projects / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
PR 21412, get_reloc_section assumes .rel/.rela name for SHT_REL/RELA.
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc64.h"
35 #include "elf64-ppc.h"
36 #include "dwarf2.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59 #define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM powerpc_elf64_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x10000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_want_dynrelro 1
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_dtrel_excludes_plt 1
80 #define elf_backend_default_execstack 0
81
82 #define bfd_elf64_mkobject ppc64_elf_mkobject
83 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93 #define elf_backend_object_p ppc64_elf_object_p
94 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96 #define elf_backend_write_core_note ppc64_elf_write_core_note
97 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100 #define elf_backend_check_directives ppc64_elf_before_check_relocs
101 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103 #define elf_backend_check_relocs ppc64_elf_check_relocs
104 #define elf_backend_gc_keep ppc64_elf_gc_keep
105 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
106 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
107 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
108 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
110 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
114 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115 #define elf_backend_action_discarded ppc64_elf_action_discarded
116 #define elf_backend_relocate_section ppc64_elf_relocate_section
117 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121 #define elf_backend_special_sections ppc64_elf_special_sections
122 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123 #define elf_backend_merge_symbol ppc64_elf_merge_symbol
124 #define elf_backend_get_reloc_section bfd_get_section_by_name
125
126 /* The name of the dynamic interpreter. This is put in the .interp
127 section. */
128 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
129
130 /* The size in bytes of an entry in the procedure linkage table. */
131 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
132
133 /* The initial size of the plt reserved for the dynamic linker. */
134 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
135
136 /* Offsets to some stack save slots. */
137 #define STK_LR 16
138 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
139 /* This one is dodgy. ELFv2 does not have a linker word, so use the
140 CR save slot. Used only by optimised __tls_get_addr call stub,
141 relying on __tls_get_addr_opt not saving CR.. */
142 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
143
144 /* TOC base pointers offset from start of TOC. */
145 #define TOC_BASE_OFF 0x8000
146 /* TOC base alignment. */
147 #define TOC_BASE_ALIGN 256
148
149 /* Offset of tp and dtp pointers from start of TLS block. */
150 #define TP_OFFSET 0x7000
151 #define DTP_OFFSET 0x8000
152
153 /* .plt call stub instructions. The normal stub is like this, but
154 sometimes the .plt entry crosses a 64k boundary and we need to
155 insert an addi to adjust r11. */
156 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
157 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
158 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
159 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
160 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
161 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
162 #define BCTR 0x4e800420 /* bctr */
163
164 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
165 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
166 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
167
168 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
169 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
170 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
171 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
172 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
173 #define BNECTR 0x4ca20420 /* bnectr+ */
174 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
175
176 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
177 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
178 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
179
180 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
181 #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
182 #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
183
184 #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
185 #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
186 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
187 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
188 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
189
190 /* glink call stub instructions. We enter with the index in R0. */
191 #define GLINK_CALL_STUB_SIZE (16*4)
192 /* 0: */
193 /* .quad plt0-1f */
194 /* __glink: */
195 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
196 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
197 /* 1: */
198 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
199 /* ld %2,(0b-1b)(%11) */
200 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
201 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
202 /* ld %12,0(%11) */
203 /* ld %2,8(%11) */
204 /* mtctr %12 */
205 /* ld %11,16(%11) */
206 /* bctr */
207 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
208 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
209 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
210 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
211 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
212
213 /* Pad with this. */
214 #define NOP 0x60000000
215
216 /* Some other nops. */
217 #define CROR_151515 0x4def7b82
218 #define CROR_313131 0x4ffffb82
219
220 /* .glink entries for the first 32k functions are two instructions. */
221 #define LI_R0_0 0x38000000 /* li %r0,0 */
222 #define B_DOT 0x48000000 /* b . */
223
224 /* After that, we need two instructions to load the index, followed by
225 a branch. */
226 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
227 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
228
229 /* Instructions used by the save and restore reg functions. */
230 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
231 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
232 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
233 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
234 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
235 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
236 #define LI_R12_0 0x39800000 /* li %r12,0 */
237 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
238 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
239 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
240 #define BLR 0x4e800020 /* blr */
241
242 /* Since .opd is an array of descriptors and each entry will end up
243 with identical R_PPC64_RELATIVE relocs, there is really no need to
244 propagate .opd relocs; The dynamic linker should be taught to
245 relocate .opd without reloc entries. */
246 #ifndef NO_OPD_RELOCS
247 #define NO_OPD_RELOCS 0
248 #endif
249
250 #ifndef ARRAY_SIZE
251 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
252 #endif
253
254 static inline int
255 abiversion (bfd *abfd)
256 {
257 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
258 }
259
260 static inline void
261 set_abiversion (bfd *abfd, int ver)
262 {
263 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
264 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
265 }
266 \f
267 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
268
269 /* Relocation HOWTO's. */
270 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
271
272 static reloc_howto_type ppc64_elf_howto_raw[] = {
273 /* This reloc does nothing. */
274 HOWTO (R_PPC64_NONE, /* type */
275 0, /* rightshift */
276 3, /* size (0 = byte, 1 = short, 2 = long) */
277 0, /* bitsize */
278 FALSE, /* pc_relative */
279 0, /* bitpos */
280 complain_overflow_dont, /* complain_on_overflow */
281 bfd_elf_generic_reloc, /* special_function */
282 "R_PPC64_NONE", /* name */
283 FALSE, /* partial_inplace */
284 0, /* src_mask */
285 0, /* dst_mask */
286 FALSE), /* pcrel_offset */
287
288 /* A standard 32 bit relocation. */
289 HOWTO (R_PPC64_ADDR32, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 32, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC64_ADDR32", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffffffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 26 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR24, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 26, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC64_ADDR24", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x03fffffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A standard 16 bit relocation. */
320 HOWTO (R_PPC64_ADDR16, /* type */
321 0, /* rightshift */
322 1, /* size (0 = byte, 1 = short, 2 = long) */
323 16, /* bitsize */
324 FALSE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_bitfield, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC64_ADDR16", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0xffff, /* dst_mask */
332 FALSE), /* pcrel_offset */
333
334 /* A 16 bit relocation without overflow. */
335 HOWTO (R_PPC64_ADDR16_LO, /* type */
336 0, /* rightshift */
337 1, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC64_ADDR16_LO", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xffff, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* Bits 16-31 of an address. */
350 HOWTO (R_PPC64_ADDR16_HI, /* type */
351 16, /* rightshift */
352 1, /* size (0 = byte, 1 = short, 2 = long) */
353 16, /* bitsize */
354 FALSE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC64_ADDR16_HI", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0xffff, /* dst_mask */
362 FALSE), /* pcrel_offset */
363
364 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
365 bits, treated as a signed number, is negative. */
366 HOWTO (R_PPC64_ADDR16_HA, /* type */
367 16, /* rightshift */
368 1, /* size (0 = byte, 1 = short, 2 = long) */
369 16, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_signed, /* complain_on_overflow */
373 ppc64_elf_ha_reloc, /* special_function */
374 "R_PPC64_ADDR16_HA", /* name */
375 FALSE, /* partial_inplace */
376 0, /* src_mask */
377 0xffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 /* An absolute 16 bit branch; the lower two bits must be zero.
381 FIXME: we don't check that, we just clear them. */
382 HOWTO (R_PPC64_ADDR14, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 ppc64_elf_branch_reloc, /* special_function */
390 "R_PPC64_ADDR14", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0x0000fffc, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 /* An absolute 16 bit branch, for which bit 10 should be set to
397 indicate that the branch is expected to be taken. The lower two
398 bits must be zero. */
399 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 FALSE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 ppc64_elf_brtaken_reloc, /* special_function */
407 "R_PPC64_ADDR14_BRTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0x0000fffc, /* dst_mask */
411 FALSE), /* pcrel_offset */
412
413 /* An absolute 16 bit branch, for which bit 10 should be set to
414 indicate that the branch is not expected to be taken. The lower
415 two bits must be zero. */
416 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
417 0, /* rightshift */
418 2, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 FALSE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 ppc64_elf_brtaken_reloc, /* special_function */
424 "R_PPC64_ADDR14_BRNTAKEN",/* name */
425 FALSE, /* partial_inplace */
426 0, /* src_mask */
427 0x0000fffc, /* dst_mask */
428 FALSE), /* pcrel_offset */
429
430 /* A relative 26 bit branch; the lower two bits must be zero. */
431 HOWTO (R_PPC64_REL24, /* type */
432 0, /* rightshift */
433 2, /* size (0 = byte, 1 = short, 2 = long) */
434 26, /* bitsize */
435 TRUE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_signed, /* complain_on_overflow */
438 ppc64_elf_branch_reloc, /* special_function */
439 "R_PPC64_REL24", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0x03fffffc, /* dst_mask */
443 TRUE), /* pcrel_offset */
444
445 /* A relative 16 bit branch; the lower two bits must be zero. */
446 HOWTO (R_PPC64_REL14, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 16, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 ppc64_elf_branch_reloc, /* special_function */
454 "R_PPC64_REL14", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x0000fffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* A relative 16 bit branch. Bit 10 should be set to indicate that
461 the branch is expected to be taken. The lower two bits must be
462 zero. */
463 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
464 0, /* rightshift */
465 2, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 TRUE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_signed, /* complain_on_overflow */
470 ppc64_elf_brtaken_reloc, /* special_function */
471 "R_PPC64_REL14_BRTAKEN", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0x0000fffc, /* dst_mask */
475 TRUE), /* pcrel_offset */
476
477 /* A relative 16 bit branch. Bit 10 should be set to indicate that
478 the branch is not expected to be taken. The lower two bits must
479 be zero. */
480 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
481 0, /* rightshift */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
483 16, /* bitsize */
484 TRUE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_signed, /* complain_on_overflow */
487 ppc64_elf_brtaken_reloc, /* special_function */
488 "R_PPC64_REL14_BRNTAKEN",/* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0x0000fffc, /* dst_mask */
492 TRUE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
495 symbol. */
496 HOWTO (R_PPC64_GOT16, /* type */
497 0, /* rightshift */
498 1, /* size (0 = byte, 1 = short, 2 = long) */
499 16, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_signed, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GOT16", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
511 the symbol. */
512 HOWTO (R_PPC64_GOT16_LO, /* type */
513 0, /* rightshift */
514 1, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_GOT16_LO", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
527 the symbol. */
528 HOWTO (R_PPC64_GOT16_HI, /* type */
529 16, /* rightshift */
530 1, /* size (0 = byte, 1 = short, 2 = long) */
531 16, /* bitsize */
532 FALSE, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_signed,/* complain_on_overflow */
535 ppc64_elf_unhandled_reloc, /* special_function */
536 "R_PPC64_GOT16_HI", /* name */
537 FALSE, /* partial_inplace */
538 0, /* src_mask */
539 0xffff, /* dst_mask */
540 FALSE), /* pcrel_offset */
541
542 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
543 the symbol. */
544 HOWTO (R_PPC64_GOT16_HA, /* type */
545 16, /* rightshift */
546 1, /* size (0 = byte, 1 = short, 2 = long) */
547 16, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_signed,/* complain_on_overflow */
551 ppc64_elf_unhandled_reloc, /* special_function */
552 "R_PPC64_GOT16_HA", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* This is used only by the dynamic linker. The symbol should exist
559 both in the object being run and in some shared library. The
560 dynamic linker copies the data addressed by the symbol from the
561 shared library into the object, because the object being
562 run has to have the data at some particular address. */
563 HOWTO (R_PPC64_COPY, /* type */
564 0, /* rightshift */
565 0, /* this one is variable size */
566 0, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_dont, /* complain_on_overflow */
570 ppc64_elf_unhandled_reloc, /* special_function */
571 "R_PPC64_COPY", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* Like R_PPC64_ADDR64, but used when setting global offset table
578 entries. */
579 HOWTO (R_PPC64_GLOB_DAT, /* type */
580 0, /* rightshift */
581 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
582 64, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 ppc64_elf_unhandled_reloc, /* special_function */
587 "R_PPC64_GLOB_DAT", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 ONES (64), /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* Created by the link editor. Marks a procedure linkage table
594 entry for a symbol. */
595 HOWTO (R_PPC64_JMP_SLOT, /* type */
596 0, /* rightshift */
597 0, /* size (0 = byte, 1 = short, 2 = long) */
598 0, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_dont, /* complain_on_overflow */
602 ppc64_elf_unhandled_reloc, /* special_function */
603 "R_PPC64_JMP_SLOT", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* Used only by the dynamic linker. When the object is run, this
610 doubleword64 is set to the load address of the object, plus the
611 addend. */
612 HOWTO (R_PPC64_RELATIVE, /* type */
613 0, /* rightshift */
614 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
615 64, /* bitsize */
616 FALSE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_dont, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_RELATIVE", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 ONES (64), /* dst_mask */
624 FALSE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR32, but may be unaligned. */
627 HOWTO (R_PPC64_UADDR32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC64_UADDR32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffffffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC64_ADDR16, but may be unaligned. */
642 HOWTO (R_PPC64_UADDR16, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC64_UADDR16", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* 32-bit PC relative. */
657 HOWTO (R_PPC64_REL32, /* type */
658 0, /* rightshift */
659 2, /* size (0 = byte, 1 = short, 2 = long) */
660 32, /* bitsize */
661 TRUE, /* pc_relative */
662 0, /* bitpos */
663 complain_overflow_signed, /* complain_on_overflow */
664 bfd_elf_generic_reloc, /* special_function */
665 "R_PPC64_REL32", /* name */
666 FALSE, /* partial_inplace */
667 0, /* src_mask */
668 0xffffffff, /* dst_mask */
669 TRUE), /* pcrel_offset */
670
671 /* 32-bit relocation to the symbol's procedure linkage table. */
672 HOWTO (R_PPC64_PLT32, /* type */
673 0, /* rightshift */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
675 32, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_bitfield, /* complain_on_overflow */
679 ppc64_elf_unhandled_reloc, /* special_function */
680 "R_PPC64_PLT32", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffffffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
687 FIXME: R_PPC64_PLTREL32 not supported. */
688 HOWTO (R_PPC64_PLTREL32, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 32, /* bitsize */
692 TRUE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 ppc64_elf_unhandled_reloc, /* special_function */
696 "R_PPC64_PLTREL32", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffffffff, /* dst_mask */
700 TRUE), /* pcrel_offset */
701
702 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
703 the symbol. */
704 HOWTO (R_PPC64_PLT16_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 ppc64_elf_unhandled_reloc, /* special_function */
712 "R_PPC64_PLT16_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
719 the symbol. */
720 HOWTO (R_PPC64_PLT16_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_signed, /* complain_on_overflow */
727 ppc64_elf_unhandled_reloc, /* special_function */
728 "R_PPC64_PLT16_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
735 the symbol. */
736 HOWTO (R_PPC64_PLT16_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_signed, /* complain_on_overflow */
743 ppc64_elf_unhandled_reloc, /* special_function */
744 "R_PPC64_PLT16_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit section relative relocation. */
751 HOWTO (R_PPC64_SECTOFF, /* type */
752 0, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 ppc64_elf_sectoff_reloc, /* special_function */
759 "R_PPC64_SECTOFF", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Like R_PPC64_SECTOFF, but no overflow warning. */
766 HOWTO (R_PPC64_SECTOFF_LO, /* type */
767 0, /* rightshift */
768 1, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc64_elf_sectoff_reloc, /* special_function */
774 "R_PPC64_SECTOFF_LO", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* 16-bit upper half section relative relocation. */
781 HOWTO (R_PPC64_SECTOFF_HI, /* type */
782 16, /* rightshift */
783 1, /* size (0 = byte, 1 = short, 2 = long) */
784 16, /* bitsize */
785 FALSE, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 ppc64_elf_sectoff_reloc, /* special_function */
789 "R_PPC64_SECTOFF_HI", /* name */
790 FALSE, /* partial_inplace */
791 0, /* src_mask */
792 0xffff, /* dst_mask */
793 FALSE), /* pcrel_offset */
794
795 /* 16-bit upper half adjusted section relative relocation. */
796 HOWTO (R_PPC64_SECTOFF_HA, /* type */
797 16, /* rightshift */
798 1, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 FALSE, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_signed, /* complain_on_overflow */
803 ppc64_elf_sectoff_ha_reloc, /* special_function */
804 "R_PPC64_SECTOFF_HA", /* name */
805 FALSE, /* partial_inplace */
806 0, /* src_mask */
807 0xffff, /* dst_mask */
808 FALSE), /* pcrel_offset */
809
810 /* Like R_PPC64_REL24 without touching the two least significant bits. */
811 HOWTO (R_PPC64_REL30, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 30, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 "R_PPC64_REL30", /* name */
820 FALSE, /* partial_inplace */
821 0, /* src_mask */
822 0xfffffffc, /* dst_mask */
823 TRUE), /* pcrel_offset */
824
825 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
826
827 /* A standard 64-bit relocation. */
828 HOWTO (R_PPC64_ADDR64, /* type */
829 0, /* rightshift */
830 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
831 64, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 bfd_elf_generic_reloc, /* special_function */
836 "R_PPC64_ADDR64", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 ONES (64), /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* The bits 32-47 of an address. */
843 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
844 32, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 "R_PPC64_ADDR16_HIGHER", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* The bits 32-47 of an address, plus 1 if the contents of the low
858 16 bits, treated as a signed number, is negative. */
859 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
860 32, /* rightshift */
861 1, /* size (0 = byte, 1 = short, 2 = long) */
862 16, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_ha_reloc, /* special_function */
867 "R_PPC64_ADDR16_HIGHERA", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* The bits 48-63 of an address. */
874 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
875 48, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 "R_PPC64_ADDR16_HIGHEST", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* The bits 48-63 of an address, plus 1 if the contents of the low
889 16 bits, treated as a signed number, is negative. */
890 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
891 48, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc64_elf_ha_reloc, /* special_function */
898 "R_PPC64_ADDR16_HIGHESTA", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like ADDR64, but may be unaligned. */
905 HOWTO (R_PPC64_UADDR64, /* type */
906 0, /* rightshift */
907 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
908 64, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 bfd_elf_generic_reloc, /* special_function */
913 "R_PPC64_UADDR64", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 ONES (64), /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* 64-bit relative relocation. */
920 HOWTO (R_PPC64_REL64, /* type */
921 0, /* rightshift */
922 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
923 64, /* bitsize */
924 TRUE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 bfd_elf_generic_reloc, /* special_function */
928 "R_PPC64_REL64", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 ONES (64), /* dst_mask */
932 TRUE), /* pcrel_offset */
933
934 /* 64-bit relocation to the symbol's procedure linkage table. */
935 HOWTO (R_PPC64_PLT64, /* type */
936 0, /* rightshift */
937 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
938 64, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_unhandled_reloc, /* special_function */
943 "R_PPC64_PLT64", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 ONES (64), /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit PC relative relocation to the symbol's procedure linkage
950 table. */
951 /* FIXME: R_PPC64_PLTREL64 not supported. */
952 HOWTO (R_PPC64_PLTREL64, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 TRUE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_unhandled_reloc, /* special_function */
960 "R_PPC64_PLTREL64", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 TRUE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation. */
967
968 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
969 HOWTO (R_PPC64_TOC16, /* type */
970 0, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_signed, /* complain_on_overflow */
976 ppc64_elf_toc_reloc, /* special_function */
977 "R_PPC64_TOC16", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 16 bit TOC-relative relocation without overflow. */
984
985 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
986 HOWTO (R_PPC64_TOC16_LO, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc64_elf_toc_reloc, /* special_function */
994 "R_PPC64_TOC16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* 16 bit TOC-relative relocation, high 16 bits. */
1001
1002 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1003 HOWTO (R_PPC64_TOC16_HI, /* type */
1004 16, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_signed, /* complain_on_overflow */
1010 ppc64_elf_toc_reloc, /* special_function */
1011 "R_PPC64_TOC16_HI", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1018 contents of the low 16 bits, treated as a signed number, is
1019 negative. */
1020
1021 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1022 HOWTO (R_PPC64_TOC16_HA, /* type */
1023 16, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc64_elf_toc_ha_reloc, /* special_function */
1030 "R_PPC64_TOC16_HA", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1037
1038 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1039 HOWTO (R_PPC64_TOC, /* type */
1040 0, /* rightshift */
1041 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1042 64, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_toc64_reloc, /* special_function */
1047 "R_PPC64_TOC", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 ONES (64), /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_GOT16, but also informs the link editor that the
1054 value to relocate may (!) refer to a PLT entry which the link
1055 editor (a) may replace with the symbol value. If the link editor
1056 is unable to fully resolve the symbol, it may (b) create a PLT
1057 entry and store the address to the new PLT entry in the GOT.
1058 This permits lazy resolution of function symbols at run time.
1059 The link editor may also skip all of this and just (c) emit a
1060 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1061 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1062 HOWTO (R_PPC64_PLTGOT16, /* type */
1063 0, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_signed, /* complain_on_overflow */
1069 ppc64_elf_unhandled_reloc, /* special_function */
1070 "R_PPC64_PLTGOT16", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like R_PPC64_PLTGOT16, but without overflow. */
1077 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1078 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1079 0, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc64_elf_unhandled_reloc, /* special_function */
1086 "R_PPC64_PLTGOT16_LO", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1093 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1094 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc64_elf_unhandled_reloc, /* special_function */
1102 "R_PPC64_PLTGOT16_HI", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1109 1 if the contents of the low 16 bits, treated as a signed number,
1110 is negative. */
1111 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1112 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1113 16, /* rightshift */
1114 1, /* size (0 = byte, 1 = short, 2 = long) */
1115 16, /* bitsize */
1116 FALSE, /* pc_relative */
1117 0, /* bitpos */
1118 complain_overflow_signed, /* complain_on_overflow */
1119 ppc64_elf_unhandled_reloc, /* special_function */
1120 "R_PPC64_PLTGOT16_HA", /* name */
1121 FALSE, /* partial_inplace */
1122 0, /* src_mask */
1123 0xffff, /* dst_mask */
1124 FALSE), /* pcrel_offset */
1125
1126 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1127 HOWTO (R_PPC64_ADDR16_DS, /* type */
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 bfd_elf_generic_reloc, /* special_function */
1135 "R_PPC64_ADDR16_DS", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xfffc, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1142 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont,/* complain_on_overflow */
1149 bfd_elf_generic_reloc, /* special_function */
1150 "R_PPC64_ADDR16_LO_DS",/* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xfffc, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1157 HOWTO (R_PPC64_GOT16_DS, /* type */
1158 0, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_signed, /* complain_on_overflow */
1164 ppc64_elf_unhandled_reloc, /* special_function */
1165 "R_PPC64_GOT16_DS", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xfffc, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1172 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc64_elf_unhandled_reloc, /* special_function */
1180 "R_PPC64_GOT16_LO_DS", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xfffc, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1187 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLT16_LO_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1202 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1203 0, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_signed, /* complain_on_overflow */
1209 ppc64_elf_sectoff_reloc, /* special_function */
1210 "R_PPC64_SECTOFF_DS", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xfffc, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1217 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1218 0, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc64_elf_sectoff_reloc, /* special_function */
1225 "R_PPC64_SECTOFF_LO_DS",/* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xfffc, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1232 HOWTO (R_PPC64_TOC16_DS, /* type */
1233 0, /* rightshift */
1234 1, /* size (0 = byte, 1 = short, 2 = long) */
1235 16, /* bitsize */
1236 FALSE, /* pc_relative */
1237 0, /* bitpos */
1238 complain_overflow_signed, /* complain_on_overflow */
1239 ppc64_elf_toc_reloc, /* special_function */
1240 "R_PPC64_TOC16_DS", /* name */
1241 FALSE, /* partial_inplace */
1242 0, /* src_mask */
1243 0xfffc, /* dst_mask */
1244 FALSE), /* pcrel_offset */
1245
1246 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1247 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1248 0, /* rightshift */
1249 1, /* size (0 = byte, 1 = short, 2 = long) */
1250 16, /* bitsize */
1251 FALSE, /* pc_relative */
1252 0, /* bitpos */
1253 complain_overflow_dont, /* complain_on_overflow */
1254 ppc64_elf_toc_reloc, /* special_function */
1255 "R_PPC64_TOC16_LO_DS", /* name */
1256 FALSE, /* partial_inplace */
1257 0, /* src_mask */
1258 0xfffc, /* dst_mask */
1259 FALSE), /* pcrel_offset */
1260
1261 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1262 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1263 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_signed, /* complain_on_overflow */
1270 ppc64_elf_unhandled_reloc, /* special_function */
1271 "R_PPC64_PLTGOT16_DS", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xfffc, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1278 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1279 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc64_elf_unhandled_reloc, /* special_function */
1287 "R_PPC64_PLTGOT16_LO_DS",/* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xfffc, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* Marker relocs for TLS. */
1294 HOWTO (R_PPC64_TLS,
1295 0, /* rightshift */
1296 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 32, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_dont, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC64_TLS", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 HOWTO (R_PPC64_TLSGD,
1309 0, /* rightshift */
1310 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 32, /* bitsize */
1312 FALSE, /* pc_relative */
1313 0, /* bitpos */
1314 complain_overflow_dont, /* complain_on_overflow */
1315 bfd_elf_generic_reloc, /* special_function */
1316 "R_PPC64_TLSGD", /* name */
1317 FALSE, /* partial_inplace */
1318 0, /* src_mask */
1319 0, /* dst_mask */
1320 FALSE), /* pcrel_offset */
1321
1322 HOWTO (R_PPC64_TLSLD,
1323 0, /* rightshift */
1324 2, /* size (0 = byte, 1 = short, 2 = long) */
1325 32, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_dont, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC64_TLSLD", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 HOWTO (R_PPC64_TOCSAVE,
1337 0, /* rightshift */
1338 2, /* size (0 = byte, 1 = short, 2 = long) */
1339 32, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_dont, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC64_TOCSAVE", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* Computes the load module index of the load module that contains the
1351 definition of its TLS sym. */
1352 HOWTO (R_PPC64_DTPMOD64,
1353 0, /* rightshift */
1354 4, /* size (0 = byte, 1 = short, 2 = long) */
1355 64, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_dont, /* complain_on_overflow */
1359 ppc64_elf_unhandled_reloc, /* special_function */
1360 "R_PPC64_DTPMOD64", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 ONES (64), /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Computes a dtv-relative displacement, the difference between the value
1367 of sym+add and the base address of the thread-local storage block that
1368 contains the definition of sym, minus 0x8000. */
1369 HOWTO (R_PPC64_DTPREL64,
1370 0, /* rightshift */
1371 4, /* size (0 = byte, 1 = short, 2 = long) */
1372 64, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 ppc64_elf_unhandled_reloc, /* special_function */
1377 "R_PPC64_DTPREL64", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 ONES (64), /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* A 16 bit dtprel reloc. */
1384 HOWTO (R_PPC64_DTPREL16,
1385 0, /* rightshift */
1386 1, /* size (0 = byte, 1 = short, 2 = long) */
1387 16, /* bitsize */
1388 FALSE, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_signed, /* complain_on_overflow */
1391 ppc64_elf_unhandled_reloc, /* special_function */
1392 "R_PPC64_DTPREL16", /* name */
1393 FALSE, /* partial_inplace */
1394 0, /* src_mask */
1395 0xffff, /* dst_mask */
1396 FALSE), /* pcrel_offset */
1397
1398 /* Like DTPREL16, but no overflow. */
1399 HOWTO (R_PPC64_DTPREL16_LO,
1400 0, /* rightshift */
1401 1, /* size (0 = byte, 1 = short, 2 = long) */
1402 16, /* bitsize */
1403 FALSE, /* pc_relative */
1404 0, /* bitpos */
1405 complain_overflow_dont, /* complain_on_overflow */
1406 ppc64_elf_unhandled_reloc, /* special_function */
1407 "R_PPC64_DTPREL16_LO", /* name */
1408 FALSE, /* partial_inplace */
1409 0, /* src_mask */
1410 0xffff, /* dst_mask */
1411 FALSE), /* pcrel_offset */
1412
1413 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1414 HOWTO (R_PPC64_DTPREL16_HI,
1415 16, /* rightshift */
1416 1, /* size (0 = byte, 1 = short, 2 = long) */
1417 16, /* bitsize */
1418 FALSE, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 ppc64_elf_unhandled_reloc, /* special_function */
1422 "R_PPC64_DTPREL16_HI", /* name */
1423 FALSE, /* partial_inplace */
1424 0, /* src_mask */
1425 0xffff, /* dst_mask */
1426 FALSE), /* pcrel_offset */
1427
1428 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1429 HOWTO (R_PPC64_DTPREL16_HA,
1430 16, /* rightshift */
1431 1, /* size (0 = byte, 1 = short, 2 = long) */
1432 16, /* bitsize */
1433 FALSE, /* pc_relative */
1434 0, /* bitpos */
1435 complain_overflow_signed, /* complain_on_overflow */
1436 ppc64_elf_unhandled_reloc, /* special_function */
1437 "R_PPC64_DTPREL16_HA", /* name */
1438 FALSE, /* partial_inplace */
1439 0, /* src_mask */
1440 0xffff, /* dst_mask */
1441 FALSE), /* pcrel_offset */
1442
1443 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1444 HOWTO (R_PPC64_DTPREL16_HIGHER,
1445 32, /* rightshift */
1446 1, /* size (0 = byte, 1 = short, 2 = long) */
1447 16, /* bitsize */
1448 FALSE, /* pc_relative */
1449 0, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 ppc64_elf_unhandled_reloc, /* special_function */
1452 "R_PPC64_DTPREL16_HIGHER", /* name */
1453 FALSE, /* partial_inplace */
1454 0, /* src_mask */
1455 0xffff, /* dst_mask */
1456 FALSE), /* pcrel_offset */
1457
1458 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1459 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1460 32, /* rightshift */
1461 1, /* size (0 = byte, 1 = short, 2 = long) */
1462 16, /* bitsize */
1463 FALSE, /* pc_relative */
1464 0, /* bitpos */
1465 complain_overflow_dont, /* complain_on_overflow */
1466 ppc64_elf_unhandled_reloc, /* special_function */
1467 "R_PPC64_DTPREL16_HIGHERA", /* name */
1468 FALSE, /* partial_inplace */
1469 0, /* src_mask */
1470 0xffff, /* dst_mask */
1471 FALSE), /* pcrel_offset */
1472
1473 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1474 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1475 48, /* rightshift */
1476 1, /* size (0 = byte, 1 = short, 2 = long) */
1477 16, /* bitsize */
1478 FALSE, /* pc_relative */
1479 0, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 ppc64_elf_unhandled_reloc, /* special_function */
1482 "R_PPC64_DTPREL16_HIGHEST", /* name */
1483 FALSE, /* partial_inplace */
1484 0, /* src_mask */
1485 0xffff, /* dst_mask */
1486 FALSE), /* pcrel_offset */
1487
1488 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1489 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1490 48, /* rightshift */
1491 1, /* size (0 = byte, 1 = short, 2 = long) */
1492 16, /* bitsize */
1493 FALSE, /* pc_relative */
1494 0, /* bitpos */
1495 complain_overflow_dont, /* complain_on_overflow */
1496 ppc64_elf_unhandled_reloc, /* special_function */
1497 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1498 FALSE, /* partial_inplace */
1499 0, /* src_mask */
1500 0xffff, /* dst_mask */
1501 FALSE), /* pcrel_offset */
1502
1503 /* Like DTPREL16, but for insns with a DS field. */
1504 HOWTO (R_PPC64_DTPREL16_DS,
1505 0, /* rightshift */
1506 1, /* size (0 = byte, 1 = short, 2 = long) */
1507 16, /* bitsize */
1508 FALSE, /* pc_relative */
1509 0, /* bitpos */
1510 complain_overflow_signed, /* complain_on_overflow */
1511 ppc64_elf_unhandled_reloc, /* special_function */
1512 "R_PPC64_DTPREL16_DS", /* name */
1513 FALSE, /* partial_inplace */
1514 0, /* src_mask */
1515 0xfffc, /* dst_mask */
1516 FALSE), /* pcrel_offset */
1517
1518 /* Like DTPREL16_DS, but no overflow. */
1519 HOWTO (R_PPC64_DTPREL16_LO_DS,
1520 0, /* rightshift */
1521 1, /* size (0 = byte, 1 = short, 2 = long) */
1522 16, /* bitsize */
1523 FALSE, /* pc_relative */
1524 0, /* bitpos */
1525 complain_overflow_dont, /* complain_on_overflow */
1526 ppc64_elf_unhandled_reloc, /* special_function */
1527 "R_PPC64_DTPREL16_LO_DS", /* name */
1528 FALSE, /* partial_inplace */
1529 0, /* src_mask */
1530 0xfffc, /* dst_mask */
1531 FALSE), /* pcrel_offset */
1532
1533 /* Computes a tp-relative displacement, the difference between the value of
1534 sym+add and the value of the thread pointer (r13). */
1535 HOWTO (R_PPC64_TPREL64,
1536 0, /* rightshift */
1537 4, /* size (0 = byte, 1 = short, 2 = long) */
1538 64, /* bitsize */
1539 FALSE, /* pc_relative */
1540 0, /* bitpos */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 ppc64_elf_unhandled_reloc, /* special_function */
1543 "R_PPC64_TPREL64", /* name */
1544 FALSE, /* partial_inplace */
1545 0, /* src_mask */
1546 ONES (64), /* dst_mask */
1547 FALSE), /* pcrel_offset */
1548
1549 /* A 16 bit tprel reloc. */
1550 HOWTO (R_PPC64_TPREL16,
1551 0, /* rightshift */
1552 1, /* size (0 = byte, 1 = short, 2 = long) */
1553 16, /* bitsize */
1554 FALSE, /* pc_relative */
1555 0, /* bitpos */
1556 complain_overflow_signed, /* complain_on_overflow */
1557 ppc64_elf_unhandled_reloc, /* special_function */
1558 "R_PPC64_TPREL16", /* name */
1559 FALSE, /* partial_inplace */
1560 0, /* src_mask */
1561 0xffff, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1563
1564 /* Like TPREL16, but no overflow. */
1565 HOWTO (R_PPC64_TPREL16_LO,
1566 0, /* rightshift */
1567 1, /* size (0 = byte, 1 = short, 2 = long) */
1568 16, /* bitsize */
1569 FALSE, /* pc_relative */
1570 0, /* bitpos */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 ppc64_elf_unhandled_reloc, /* special_function */
1573 "R_PPC64_TPREL16_LO", /* name */
1574 FALSE, /* partial_inplace */
1575 0, /* src_mask */
1576 0xffff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1578
1579 /* Like TPREL16_LO, but next higher group of 16 bits. */
1580 HOWTO (R_PPC64_TPREL16_HI,
1581 16, /* rightshift */
1582 1, /* size (0 = byte, 1 = short, 2 = long) */
1583 16, /* bitsize */
1584 FALSE, /* pc_relative */
1585 0, /* bitpos */
1586 complain_overflow_signed, /* complain_on_overflow */
1587 ppc64_elf_unhandled_reloc, /* special_function */
1588 "R_PPC64_TPREL16_HI", /* name */
1589 FALSE, /* partial_inplace */
1590 0, /* src_mask */
1591 0xffff, /* dst_mask */
1592 FALSE), /* pcrel_offset */
1593
1594 /* Like TPREL16_HI, but adjust for low 16 bits. */
1595 HOWTO (R_PPC64_TPREL16_HA,
1596 16, /* rightshift */
1597 1, /* size (0 = byte, 1 = short, 2 = long) */
1598 16, /* bitsize */
1599 FALSE, /* pc_relative */
1600 0, /* bitpos */
1601 complain_overflow_signed, /* complain_on_overflow */
1602 ppc64_elf_unhandled_reloc, /* special_function */
1603 "R_PPC64_TPREL16_HA", /* name */
1604 FALSE, /* partial_inplace */
1605 0, /* src_mask */
1606 0xffff, /* dst_mask */
1607 FALSE), /* pcrel_offset */
1608
1609 /* Like TPREL16_HI, but next higher group of 16 bits. */
1610 HOWTO (R_PPC64_TPREL16_HIGHER,
1611 32, /* rightshift */
1612 1, /* size (0 = byte, 1 = short, 2 = long) */
1613 16, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
1616 complain_overflow_dont, /* complain_on_overflow */
1617 ppc64_elf_unhandled_reloc, /* special_function */
1618 "R_PPC64_TPREL16_HIGHER", /* name */
1619 FALSE, /* partial_inplace */
1620 0, /* src_mask */
1621 0xffff, /* dst_mask */
1622 FALSE), /* pcrel_offset */
1623
1624 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1625 HOWTO (R_PPC64_TPREL16_HIGHERA,
1626 32, /* rightshift */
1627 1, /* size (0 = byte, 1 = short, 2 = long) */
1628 16, /* bitsize */
1629 FALSE, /* pc_relative */
1630 0, /* bitpos */
1631 complain_overflow_dont, /* complain_on_overflow */
1632 ppc64_elf_unhandled_reloc, /* special_function */
1633 "R_PPC64_TPREL16_HIGHERA", /* name */
1634 FALSE, /* partial_inplace */
1635 0, /* src_mask */
1636 0xffff, /* dst_mask */
1637 FALSE), /* pcrel_offset */
1638
1639 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1640 HOWTO (R_PPC64_TPREL16_HIGHEST,
1641 48, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_dont, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_TPREL16_HIGHEST", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1655 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1656 48, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_TPREL16_HIGHESTA", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like TPREL16, but for insns with a DS field. */
1670 HOWTO (R_PPC64_TPREL16_DS,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_signed, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_TPREL16_DS", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xfffc, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like TPREL16_DS, but no overflow. */
1685 HOWTO (R_PPC64_TPREL16_LO_DS,
1686 0, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_TPREL16_LO_DS", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xfffc, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1700 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1701 to the first entry relative to the TOC base (r2). */
1702 HOWTO (R_PPC64_GOT_TLSGD16,
1703 0, /* rightshift */
1704 1, /* size (0 = byte, 1 = short, 2 = long) */
1705 16, /* bitsize */
1706 FALSE, /* pc_relative */
1707 0, /* bitpos */
1708 complain_overflow_signed, /* complain_on_overflow */
1709 ppc64_elf_unhandled_reloc, /* special_function */
1710 "R_PPC64_GOT_TLSGD16", /* name */
1711 FALSE, /* partial_inplace */
1712 0, /* src_mask */
1713 0xffff, /* dst_mask */
1714 FALSE), /* pcrel_offset */
1715
1716 /* Like GOT_TLSGD16, but no overflow. */
1717 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1718 0, /* rightshift */
1719 1, /* size (0 = byte, 1 = short, 2 = long) */
1720 16, /* bitsize */
1721 FALSE, /* pc_relative */
1722 0, /* bitpos */
1723 complain_overflow_dont, /* complain_on_overflow */
1724 ppc64_elf_unhandled_reloc, /* special_function */
1725 "R_PPC64_GOT_TLSGD16_LO", /* name */
1726 FALSE, /* partial_inplace */
1727 0, /* src_mask */
1728 0xffff, /* dst_mask */
1729 FALSE), /* pcrel_offset */
1730
1731 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1732 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1733 16, /* rightshift */
1734 1, /* size (0 = byte, 1 = short, 2 = long) */
1735 16, /* bitsize */
1736 FALSE, /* pc_relative */
1737 0, /* bitpos */
1738 complain_overflow_signed, /* complain_on_overflow */
1739 ppc64_elf_unhandled_reloc, /* special_function */
1740 "R_PPC64_GOT_TLSGD16_HI", /* name */
1741 FALSE, /* partial_inplace */
1742 0, /* src_mask */
1743 0xffff, /* dst_mask */
1744 FALSE), /* pcrel_offset */
1745
1746 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1747 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1748 16, /* rightshift */
1749 1, /* size (0 = byte, 1 = short, 2 = long) */
1750 16, /* bitsize */
1751 FALSE, /* pc_relative */
1752 0, /* bitpos */
1753 complain_overflow_signed, /* complain_on_overflow */
1754 ppc64_elf_unhandled_reloc, /* special_function */
1755 "R_PPC64_GOT_TLSGD16_HA", /* name */
1756 FALSE, /* partial_inplace */
1757 0, /* src_mask */
1758 0xffff, /* dst_mask */
1759 FALSE), /* pcrel_offset */
1760
1761 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1762 with values (sym+add)@dtpmod and zero, and computes the offset to the
1763 first entry relative to the TOC base (r2). */
1764 HOWTO (R_PPC64_GOT_TLSLD16,
1765 0, /* rightshift */
1766 1, /* size (0 = byte, 1 = short, 2 = long) */
1767 16, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_signed, /* complain_on_overflow */
1771 ppc64_elf_unhandled_reloc, /* special_function */
1772 "R_PPC64_GOT_TLSLD16", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0xffff, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Like GOT_TLSLD16, but no overflow. */
1779 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_dont, /* complain_on_overflow */
1786 ppc64_elf_unhandled_reloc, /* special_function */
1787 "R_PPC64_GOT_TLSLD16_LO", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792
1793 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1794 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1795 16, /* rightshift */
1796 1, /* size (0 = byte, 1 = short, 2 = long) */
1797 16, /* bitsize */
1798 FALSE, /* pc_relative */
1799 0, /* bitpos */
1800 complain_overflow_signed, /* complain_on_overflow */
1801 ppc64_elf_unhandled_reloc, /* special_function */
1802 "R_PPC64_GOT_TLSLD16_HI", /* name */
1803 FALSE, /* partial_inplace */
1804 0, /* src_mask */
1805 0xffff, /* dst_mask */
1806 FALSE), /* pcrel_offset */
1807
1808 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1809 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1810 16, /* rightshift */
1811 1, /* size (0 = byte, 1 = short, 2 = long) */
1812 16, /* bitsize */
1813 FALSE, /* pc_relative */
1814 0, /* bitpos */
1815 complain_overflow_signed, /* complain_on_overflow */
1816 ppc64_elf_unhandled_reloc, /* special_function */
1817 "R_PPC64_GOT_TLSLD16_HA", /* name */
1818 FALSE, /* partial_inplace */
1819 0, /* src_mask */
1820 0xffff, /* dst_mask */
1821 FALSE), /* pcrel_offset */
1822
1823 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1824 the offset to the entry relative to the TOC base (r2). */
1825 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1826 0, /* rightshift */
1827 1, /* size (0 = byte, 1 = short, 2 = long) */
1828 16, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
1831 complain_overflow_signed, /* complain_on_overflow */
1832 ppc64_elf_unhandled_reloc, /* special_function */
1833 "R_PPC64_GOT_DTPREL16_DS", /* name */
1834 FALSE, /* partial_inplace */
1835 0, /* src_mask */
1836 0xfffc, /* dst_mask */
1837 FALSE), /* pcrel_offset */
1838
1839 /* Like GOT_DTPREL16_DS, but no overflow. */
1840 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1841 0, /* rightshift */
1842 1, /* size (0 = byte, 1 = short, 2 = long) */
1843 16, /* bitsize */
1844 FALSE, /* pc_relative */
1845 0, /* bitpos */
1846 complain_overflow_dont, /* complain_on_overflow */
1847 ppc64_elf_unhandled_reloc, /* special_function */
1848 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1849 FALSE, /* partial_inplace */
1850 0, /* src_mask */
1851 0xfffc, /* dst_mask */
1852 FALSE), /* pcrel_offset */
1853
1854 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1855 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1856 16, /* rightshift */
1857 1, /* size (0 = byte, 1 = short, 2 = long) */
1858 16, /* bitsize */
1859 FALSE, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_signed, /* complain_on_overflow */
1862 ppc64_elf_unhandled_reloc, /* special_function */
1863 "R_PPC64_GOT_DTPREL16_HI", /* name */
1864 FALSE, /* partial_inplace */
1865 0, /* src_mask */
1866 0xffff, /* dst_mask */
1867 FALSE), /* pcrel_offset */
1868
1869 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1870 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1871 16, /* rightshift */
1872 1, /* size (0 = byte, 1 = short, 2 = long) */
1873 16, /* bitsize */
1874 FALSE, /* pc_relative */
1875 0, /* bitpos */
1876 complain_overflow_signed, /* complain_on_overflow */
1877 ppc64_elf_unhandled_reloc, /* special_function */
1878 "R_PPC64_GOT_DTPREL16_HA", /* name */
1879 FALSE, /* partial_inplace */
1880 0, /* src_mask */
1881 0xffff, /* dst_mask */
1882 FALSE), /* pcrel_offset */
1883
1884 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1885 offset to the entry relative to the TOC base (r2). */
1886 HOWTO (R_PPC64_GOT_TPREL16_DS,
1887 0, /* rightshift */
1888 1, /* size (0 = byte, 1 = short, 2 = long) */
1889 16, /* bitsize */
1890 FALSE, /* pc_relative */
1891 0, /* bitpos */
1892 complain_overflow_signed, /* complain_on_overflow */
1893 ppc64_elf_unhandled_reloc, /* special_function */
1894 "R_PPC64_GOT_TPREL16_DS", /* name */
1895 FALSE, /* partial_inplace */
1896 0, /* src_mask */
1897 0xfffc, /* dst_mask */
1898 FALSE), /* pcrel_offset */
1899
1900 /* Like GOT_TPREL16_DS, but no overflow. */
1901 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1902 0, /* rightshift */
1903 1, /* size (0 = byte, 1 = short, 2 = long) */
1904 16, /* bitsize */
1905 FALSE, /* pc_relative */
1906 0, /* bitpos */
1907 complain_overflow_dont, /* complain_on_overflow */
1908 ppc64_elf_unhandled_reloc, /* special_function */
1909 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1910 FALSE, /* partial_inplace */
1911 0, /* src_mask */
1912 0xfffc, /* dst_mask */
1913 FALSE), /* pcrel_offset */
1914
1915 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1916 HOWTO (R_PPC64_GOT_TPREL16_HI,
1917 16, /* rightshift */
1918 1, /* size (0 = byte, 1 = short, 2 = long) */
1919 16, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_signed, /* complain_on_overflow */
1923 ppc64_elf_unhandled_reloc, /* special_function */
1924 "R_PPC64_GOT_TPREL16_HI", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 0xffff, /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1931 HOWTO (R_PPC64_GOT_TPREL16_HA,
1932 16, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 FALSE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_signed, /* complain_on_overflow */
1938 ppc64_elf_unhandled_reloc, /* special_function */
1939 "R_PPC64_GOT_TPREL16_HA", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 FALSE), /* pcrel_offset */
1944
1945 HOWTO (R_PPC64_JMP_IREL, /* type */
1946 0, /* rightshift */
1947 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1948 0, /* bitsize */
1949 FALSE, /* pc_relative */
1950 0, /* bitpos */
1951 complain_overflow_dont, /* complain_on_overflow */
1952 ppc64_elf_unhandled_reloc, /* special_function */
1953 "R_PPC64_JMP_IREL", /* name */
1954 FALSE, /* partial_inplace */
1955 0, /* src_mask */
1956 0, /* dst_mask */
1957 FALSE), /* pcrel_offset */
1958
1959 HOWTO (R_PPC64_IRELATIVE, /* type */
1960 0, /* rightshift */
1961 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1962 64, /* bitsize */
1963 FALSE, /* pc_relative */
1964 0, /* bitpos */
1965 complain_overflow_dont, /* complain_on_overflow */
1966 bfd_elf_generic_reloc, /* special_function */
1967 "R_PPC64_IRELATIVE", /* name */
1968 FALSE, /* partial_inplace */
1969 0, /* src_mask */
1970 ONES (64), /* dst_mask */
1971 FALSE), /* pcrel_offset */
1972
1973 /* A 16 bit relative relocation. */
1974 HOWTO (R_PPC64_REL16, /* type */
1975 0, /* rightshift */
1976 1, /* size (0 = byte, 1 = short, 2 = long) */
1977 16, /* bitsize */
1978 TRUE, /* pc_relative */
1979 0, /* bitpos */
1980 complain_overflow_signed, /* complain_on_overflow */
1981 bfd_elf_generic_reloc, /* special_function */
1982 "R_PPC64_REL16", /* name */
1983 FALSE, /* partial_inplace */
1984 0, /* src_mask */
1985 0xffff, /* dst_mask */
1986 TRUE), /* pcrel_offset */
1987
1988 /* A 16 bit relative relocation without overflow. */
1989 HOWTO (R_PPC64_REL16_LO, /* type */
1990 0, /* rightshift */
1991 1, /* size (0 = byte, 1 = short, 2 = long) */
1992 16, /* bitsize */
1993 TRUE, /* pc_relative */
1994 0, /* bitpos */
1995 complain_overflow_dont,/* complain_on_overflow */
1996 bfd_elf_generic_reloc, /* special_function */
1997 "R_PPC64_REL16_LO", /* name */
1998 FALSE, /* partial_inplace */
1999 0, /* src_mask */
2000 0xffff, /* dst_mask */
2001 TRUE), /* pcrel_offset */
2002
2003 /* The high order 16 bits of a relative address. */
2004 HOWTO (R_PPC64_REL16_HI, /* type */
2005 16, /* rightshift */
2006 1, /* size (0 = byte, 1 = short, 2 = long) */
2007 16, /* bitsize */
2008 TRUE, /* pc_relative */
2009 0, /* bitpos */
2010 complain_overflow_signed, /* complain_on_overflow */
2011 bfd_elf_generic_reloc, /* special_function */
2012 "R_PPC64_REL16_HI", /* name */
2013 FALSE, /* partial_inplace */
2014 0, /* src_mask */
2015 0xffff, /* dst_mask */
2016 TRUE), /* pcrel_offset */
2017
2018 /* The high order 16 bits of a relative address, plus 1 if the contents of
2019 the low 16 bits, treated as a signed number, is negative. */
2020 HOWTO (R_PPC64_REL16_HA, /* type */
2021 16, /* rightshift */
2022 1, /* size (0 = byte, 1 = short, 2 = long) */
2023 16, /* bitsize */
2024 TRUE, /* pc_relative */
2025 0, /* bitpos */
2026 complain_overflow_signed, /* complain_on_overflow */
2027 ppc64_elf_ha_reloc, /* special_function */
2028 "R_PPC64_REL16_HA", /* name */
2029 FALSE, /* partial_inplace */
2030 0, /* src_mask */
2031 0xffff, /* dst_mask */
2032 TRUE), /* pcrel_offset */
2033
2034 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2035 HOWTO (R_PPC64_REL16DX_HA, /* type */
2036 16, /* rightshift */
2037 2, /* size (0 = byte, 1 = short, 2 = long) */
2038 16, /* bitsize */
2039 TRUE, /* pc_relative */
2040 0, /* bitpos */
2041 complain_overflow_signed, /* complain_on_overflow */
2042 ppc64_elf_ha_reloc, /* special_function */
2043 "R_PPC64_REL16DX_HA", /* name */
2044 FALSE, /* partial_inplace */
2045 0, /* src_mask */
2046 0x1fffc1, /* dst_mask */
2047 TRUE), /* pcrel_offset */
2048
2049 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
2050 HOWTO (R_PPC64_16DX_HA, /* type */
2051 16, /* rightshift */
2052 2, /* size (0 = byte, 1 = short, 2 = long) */
2053 16, /* bitsize */
2054 FALSE, /* pc_relative */
2055 0, /* bitpos */
2056 complain_overflow_signed, /* complain_on_overflow */
2057 ppc64_elf_ha_reloc, /* special_function */
2058 "R_PPC64_16DX_HA", /* name */
2059 FALSE, /* partial_inplace */
2060 0, /* src_mask */
2061 0x1fffc1, /* dst_mask */
2062 FALSE), /* pcrel_offset */
2063
2064 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2065 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2066 16, /* rightshift */
2067 1, /* size (0 = byte, 1 = short, 2 = long) */
2068 16, /* bitsize */
2069 FALSE, /* pc_relative */
2070 0, /* bitpos */
2071 complain_overflow_dont, /* complain_on_overflow */
2072 bfd_elf_generic_reloc, /* special_function */
2073 "R_PPC64_ADDR16_HIGH", /* name */
2074 FALSE, /* partial_inplace */
2075 0, /* src_mask */
2076 0xffff, /* dst_mask */
2077 FALSE), /* pcrel_offset */
2078
2079 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2080 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2081 16, /* rightshift */
2082 1, /* size (0 = byte, 1 = short, 2 = long) */
2083 16, /* bitsize */
2084 FALSE, /* pc_relative */
2085 0, /* bitpos */
2086 complain_overflow_dont, /* complain_on_overflow */
2087 ppc64_elf_ha_reloc, /* special_function */
2088 "R_PPC64_ADDR16_HIGHA", /* name */
2089 FALSE, /* partial_inplace */
2090 0, /* src_mask */
2091 0xffff, /* dst_mask */
2092 FALSE), /* pcrel_offset */
2093
2094 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2095 HOWTO (R_PPC64_DTPREL16_HIGH,
2096 16, /* rightshift */
2097 1, /* size (0 = byte, 1 = short, 2 = long) */
2098 16, /* bitsize */
2099 FALSE, /* pc_relative */
2100 0, /* bitpos */
2101 complain_overflow_dont, /* complain_on_overflow */
2102 ppc64_elf_unhandled_reloc, /* special_function */
2103 "R_PPC64_DTPREL16_HIGH", /* name */
2104 FALSE, /* partial_inplace */
2105 0, /* src_mask */
2106 0xffff, /* dst_mask */
2107 FALSE), /* pcrel_offset */
2108
2109 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2110 HOWTO (R_PPC64_DTPREL16_HIGHA,
2111 16, /* rightshift */
2112 1, /* size (0 = byte, 1 = short, 2 = long) */
2113 16, /* bitsize */
2114 FALSE, /* pc_relative */
2115 0, /* bitpos */
2116 complain_overflow_dont, /* complain_on_overflow */
2117 ppc64_elf_unhandled_reloc, /* special_function */
2118 "R_PPC64_DTPREL16_HIGHA", /* name */
2119 FALSE, /* partial_inplace */
2120 0, /* src_mask */
2121 0xffff, /* dst_mask */
2122 FALSE), /* pcrel_offset */
2123
2124 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2125 HOWTO (R_PPC64_TPREL16_HIGH,
2126 16, /* rightshift */
2127 1, /* size (0 = byte, 1 = short, 2 = long) */
2128 16, /* bitsize */
2129 FALSE, /* pc_relative */
2130 0, /* bitpos */
2131 complain_overflow_dont, /* complain_on_overflow */
2132 ppc64_elf_unhandled_reloc, /* special_function */
2133 "R_PPC64_TPREL16_HIGH", /* name */
2134 FALSE, /* partial_inplace */
2135 0, /* src_mask */
2136 0xffff, /* dst_mask */
2137 FALSE), /* pcrel_offset */
2138
2139 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2140 HOWTO (R_PPC64_TPREL16_HIGHA,
2141 16, /* rightshift */
2142 1, /* size (0 = byte, 1 = short, 2 = long) */
2143 16, /* bitsize */
2144 FALSE, /* pc_relative */
2145 0, /* bitpos */
2146 complain_overflow_dont, /* complain_on_overflow */
2147 ppc64_elf_unhandled_reloc, /* special_function */
2148 "R_PPC64_TPREL16_HIGHA", /* name */
2149 FALSE, /* partial_inplace */
2150 0, /* src_mask */
2151 0xffff, /* dst_mask */
2152 FALSE), /* pcrel_offset */
2153
2154 /* Marker reloc on ELFv2 large-model function entry. */
2155 HOWTO (R_PPC64_ENTRY,
2156 0, /* rightshift */
2157 2, /* size (0 = byte, 1 = short, 2 = long) */
2158 32, /* bitsize */
2159 FALSE, /* pc_relative */
2160 0, /* bitpos */
2161 complain_overflow_dont, /* complain_on_overflow */
2162 bfd_elf_generic_reloc, /* special_function */
2163 "R_PPC64_ENTRY", /* name */
2164 FALSE, /* partial_inplace */
2165 0, /* src_mask */
2166 0, /* dst_mask */
2167 FALSE), /* pcrel_offset */
2168
2169 /* Like ADDR64, but use local entry point of function. */
2170 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2171 0, /* rightshift */
2172 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2173 64, /* bitsize */
2174 FALSE, /* pc_relative */
2175 0, /* bitpos */
2176 complain_overflow_dont, /* complain_on_overflow */
2177 bfd_elf_generic_reloc, /* special_function */
2178 "R_PPC64_ADDR64_LOCAL", /* name */
2179 FALSE, /* partial_inplace */
2180 0, /* src_mask */
2181 ONES (64), /* dst_mask */
2182 FALSE), /* pcrel_offset */
2183
2184 /* GNU extension to record C++ vtable hierarchy. */
2185 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2186 0, /* rightshift */
2187 0, /* size (0 = byte, 1 = short, 2 = long) */
2188 0, /* bitsize */
2189 FALSE, /* pc_relative */
2190 0, /* bitpos */
2191 complain_overflow_dont, /* complain_on_overflow */
2192 NULL, /* special_function */
2193 "R_PPC64_GNU_VTINHERIT", /* name */
2194 FALSE, /* partial_inplace */
2195 0, /* src_mask */
2196 0, /* dst_mask */
2197 FALSE), /* pcrel_offset */
2198
2199 /* GNU extension to record C++ vtable member usage. */
2200 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2201 0, /* rightshift */
2202 0, /* size (0 = byte, 1 = short, 2 = long) */
2203 0, /* bitsize */
2204 FALSE, /* pc_relative */
2205 0, /* bitpos */
2206 complain_overflow_dont, /* complain_on_overflow */
2207 NULL, /* special_function */
2208 "R_PPC64_GNU_VTENTRY", /* name */
2209 FALSE, /* partial_inplace */
2210 0, /* src_mask */
2211 0, /* dst_mask */
2212 FALSE), /* pcrel_offset */
2213 };
2214
2215 \f
2216 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2217 be done. */
2218
2219 static void
2220 ppc_howto_init (void)
2221 {
2222 unsigned int i, type;
2223
2224 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2225 {
2226 type = ppc64_elf_howto_raw[i].type;
2227 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2228 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2229 }
2230 }
2231
2232 static reloc_howto_type *
2233 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2234 bfd_reloc_code_real_type code)
2235 {
2236 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2237
2238 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2239 /* Initialize howto table if needed. */
2240 ppc_howto_init ();
2241
2242 switch (code)
2243 {
2244 default:
2245 return NULL;
2246
2247 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2248 break;
2249 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2250 break;
2251 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2252 break;
2253 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2254 break;
2255 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2256 break;
2257 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2258 break;
2259 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2260 break;
2261 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2262 break;
2263 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2264 break;
2265 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2266 break;
2267 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2268 break;
2269 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2270 break;
2271 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2272 break;
2273 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2274 break;
2275 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2276 break;
2277 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2278 break;
2279 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2280 break;
2281 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2286 break;
2287 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2288 break;
2289 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2290 break;
2291 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2292 break;
2293 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2294 break;
2295 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2296 break;
2297 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2298 break;
2299 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2300 break;
2301 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2302 break;
2303 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2304 break;
2305 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2306 break;
2307 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2308 break;
2309 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2310 break;
2311 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2312 break;
2313 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2314 break;
2315 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2316 break;
2317 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2318 break;
2319 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2320 break;
2321 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2322 break;
2323 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2324 break;
2325 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2326 break;
2327 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2328 break;
2329 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2330 break;
2331 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2332 break;
2333 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2334 break;
2335 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2338 break;
2339 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2340 break;
2341 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2342 break;
2343 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2344 break;
2345 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2346 break;
2347 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2348 break;
2349 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2350 break;
2351 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2352 break;
2353 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2354 break;
2355 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2358 break;
2359 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2360 break;
2361 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2362 break;
2363 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2366 break;
2367 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2368 break;
2369 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2370 break;
2371 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2372 break;
2373 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2374 break;
2375 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2376 break;
2377 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2378 break;
2379 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2380 break;
2381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2382 break;
2383 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2384 break;
2385 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2386 break;
2387 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2388 break;
2389 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2390 break;
2391 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2392 break;
2393 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2394 break;
2395 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2396 break;
2397 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2398 break;
2399 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2402 break;
2403 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2414 break;
2415 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2416 break;
2417 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2420 break;
2421 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2426 break;
2427 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2428 break;
2429 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2430 break;
2431 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2432 break;
2433 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2434 break;
2435 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2436 break;
2437 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2438 break;
2439 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2440 break;
2441 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2442 break;
2443 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2444 break;
2445 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2446 break;
2447 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2448 break;
2449 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2450 break;
2451 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2452 break;
2453 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2454 break;
2455 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2456 break;
2457 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2458 break;
2459 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2460 break;
2461 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2462 break;
2463 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2464 break;
2465 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2466 break;
2467 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2468 break;
2469 case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA;
2470 break;
2471 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2472 break;
2473 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2474 break;
2475 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2476 break;
2477 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2478 break;
2479 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2480 break;
2481 }
2482
2483 return ppc64_elf_howto_table[r];
2484 };
2485
2486 static reloc_howto_type *
2487 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2488 const char *r_name)
2489 {
2490 unsigned int i;
2491
2492 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2493 if (ppc64_elf_howto_raw[i].name != NULL
2494 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2495 return &ppc64_elf_howto_raw[i];
2496
2497 return NULL;
2498 }
2499
2500 /* Set the howto pointer for a PowerPC ELF reloc. */
2501
2502 static void
2503 ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr,
2504 Elf_Internal_Rela *dst)
2505 {
2506 unsigned int type;
2507
2508 /* Initialize howto table if needed. */
2509 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2510 ppc_howto_init ();
2511
2512 type = ELF64_R_TYPE (dst->r_info);
2513 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2514 {
2515 /* xgettext:c-format */
2516 _bfd_error_handler (_("%B: invalid relocation type %d"),
2517 abfd, (int) type);
2518 type = R_PPC64_NONE;
2519 }
2520 cache_ptr->howto = ppc64_elf_howto_table[type];
2521 }
2522
2523 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2524
2525 static bfd_reloc_status_type
2526 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2527 void *data, asection *input_section,
2528 bfd *output_bfd, char **error_message)
2529 {
2530 enum elf_ppc64_reloc_type r_type;
2531 long insn;
2532 bfd_size_type octets;
2533 bfd_vma value;
2534
2535 /* If this is a relocatable link (output_bfd test tells us), just
2536 call the generic function. Any adjustment will be done at final
2537 link time. */
2538 if (output_bfd != NULL)
2539 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2540 input_section, output_bfd, error_message);
2541
2542 /* Adjust the addend for sign extension of the low 16 bits.
2543 We won't actually be using the low 16 bits, so trashing them
2544 doesn't matter. */
2545 reloc_entry->addend += 0x8000;
2546 r_type = reloc_entry->howto->type;
2547 if (r_type != R_PPC64_REL16DX_HA)
2548 return bfd_reloc_continue;
2549
2550 value = 0;
2551 if (!bfd_is_com_section (symbol->section))
2552 value = symbol->value;
2553 value += (reloc_entry->addend
2554 + symbol->section->output_offset
2555 + symbol->section->output_section->vma);
2556 value -= (reloc_entry->address
2557 + input_section->output_offset
2558 + input_section->output_section->vma);
2559 value = (bfd_signed_vma) value >> 16;
2560
2561 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2562 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2563 insn &= ~0x1fffc1;
2564 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2565 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2566 if (value + 0x8000 > 0xffff)
2567 return bfd_reloc_overflow;
2568 return bfd_reloc_ok;
2569 }
2570
2571 static bfd_reloc_status_type
2572 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2573 void *data, asection *input_section,
2574 bfd *output_bfd, char **error_message)
2575 {
2576 if (output_bfd != NULL)
2577 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2578 input_section, output_bfd, error_message);
2579
2580 if (strcmp (symbol->section->name, ".opd") == 0
2581 && (symbol->section->owner->flags & DYNAMIC) == 0)
2582 {
2583 bfd_vma dest = opd_entry_value (symbol->section,
2584 symbol->value + reloc_entry->addend,
2585 NULL, NULL, FALSE);
2586 if (dest != (bfd_vma) -1)
2587 reloc_entry->addend = dest - (symbol->value
2588 + symbol->section->output_section->vma
2589 + symbol->section->output_offset);
2590 }
2591 else
2592 {
2593 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2594
2595 if (symbol->section->owner != abfd
2596 && symbol->section->owner != NULL
2597 && abiversion (symbol->section->owner) >= 2)
2598 {
2599 unsigned int i;
2600
2601 for (i = 0; i < symbol->section->owner->symcount; ++i)
2602 {
2603 asymbol *symdef = symbol->section->owner->outsymbols[i];
2604
2605 if (strcmp (symdef->name, symbol->name) == 0)
2606 {
2607 elfsym = (elf_symbol_type *) symdef;
2608 break;
2609 }
2610 }
2611 }
2612 reloc_entry->addend
2613 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2614 }
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 long insn;
2624 enum elf_ppc64_reloc_type r_type;
2625 bfd_size_type octets;
2626 /* Assume 'at' branch hints. */
2627 bfd_boolean is_isa_v2 = TRUE;
2628
2629 /* If this is a relocatable link (output_bfd test tells us), just
2630 call the generic function. Any adjustment will be done at final
2631 link time. */
2632 if (output_bfd != NULL)
2633 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2634 input_section, output_bfd, error_message);
2635
2636 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2637 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2638 insn &= ~(0x01 << 21);
2639 r_type = reloc_entry->howto->type;
2640 if (r_type == R_PPC64_ADDR14_BRTAKEN
2641 || r_type == R_PPC64_REL14_BRTAKEN)
2642 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2643
2644 if (is_isa_v2)
2645 {
2646 /* Set 'a' bit. This is 0b00010 in BO field for branch
2647 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2648 for branch on CTR insns (BO == 1a00t or 1a01t). */
2649 if ((insn & (0x14 << 21)) == (0x04 << 21))
2650 insn |= 0x02 << 21;
2651 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2652 insn |= 0x08 << 21;
2653 else
2654 goto out;
2655 }
2656 else
2657 {
2658 bfd_vma target = 0;
2659 bfd_vma from;
2660
2661 if (!bfd_is_com_section (symbol->section))
2662 target = symbol->value;
2663 target += symbol->section->output_section->vma;
2664 target += symbol->section->output_offset;
2665 target += reloc_entry->addend;
2666
2667 from = (reloc_entry->address
2668 + input_section->output_offset
2669 + input_section->output_section->vma);
2670
2671 /* Invert 'y' bit if not the default. */
2672 if ((bfd_signed_vma) (target - from) < 0)
2673 insn ^= 0x01 << 21;
2674 }
2675 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2676 out:
2677 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679 }
2680
2681 static bfd_reloc_status_type
2682 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2683 void *data, asection *input_section,
2684 bfd *output_bfd, char **error_message)
2685 {
2686 /* If this is a relocatable link (output_bfd test tells us), just
2687 call the generic function. Any adjustment will be done at final
2688 link time. */
2689 if (output_bfd != NULL)
2690 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2691 input_section, output_bfd, error_message);
2692
2693 /* Subtract the symbol section base address. */
2694 reloc_entry->addend -= symbol->section->output_section->vma;
2695 return bfd_reloc_continue;
2696 }
2697
2698 static bfd_reloc_status_type
2699 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2700 void *data, asection *input_section,
2701 bfd *output_bfd, char **error_message)
2702 {
2703 /* If this is a relocatable link (output_bfd test tells us), just
2704 call the generic function. Any adjustment will be done at final
2705 link time. */
2706 if (output_bfd != NULL)
2707 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2708 input_section, output_bfd, error_message);
2709
2710 /* Subtract the symbol section base address. */
2711 reloc_entry->addend -= symbol->section->output_section->vma;
2712
2713 /* Adjust the addend for sign extension of the low 16 bits. */
2714 reloc_entry->addend += 0x8000;
2715 return bfd_reloc_continue;
2716 }
2717
2718 static bfd_reloc_status_type
2719 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2720 void *data, asection *input_section,
2721 bfd *output_bfd, char **error_message)
2722 {
2723 bfd_vma TOCstart;
2724
2725 /* If this is a relocatable link (output_bfd test tells us), just
2726 call the generic function. Any adjustment will be done at final
2727 link time. */
2728 if (output_bfd != NULL)
2729 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2730 input_section, output_bfd, error_message);
2731
2732 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2733 if (TOCstart == 0)
2734 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2735
2736 /* Subtract the TOC base address. */
2737 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2738 return bfd_reloc_continue;
2739 }
2740
2741 static bfd_reloc_status_type
2742 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2743 void *data, asection *input_section,
2744 bfd *output_bfd, char **error_message)
2745 {
2746 bfd_vma TOCstart;
2747
2748 /* If this is a relocatable link (output_bfd test tells us), just
2749 call the generic function. Any adjustment will be done at final
2750 link time. */
2751 if (output_bfd != NULL)
2752 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2753 input_section, output_bfd, error_message);
2754
2755 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2756 if (TOCstart == 0)
2757 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2758
2759 /* Subtract the TOC base address. */
2760 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2761
2762 /* Adjust the addend for sign extension of the low 16 bits. */
2763 reloc_entry->addend += 0x8000;
2764 return bfd_reloc_continue;
2765 }
2766
2767 static bfd_reloc_status_type
2768 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2769 void *data, asection *input_section,
2770 bfd *output_bfd, char **error_message)
2771 {
2772 bfd_vma TOCstart;
2773 bfd_size_type octets;
2774
2775 /* If this is a relocatable link (output_bfd test tells us), just
2776 call the generic function. Any adjustment will be done at final
2777 link time. */
2778 if (output_bfd != NULL)
2779 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2780 input_section, output_bfd, error_message);
2781
2782 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2783 if (TOCstart == 0)
2784 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2785
2786 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2787 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2788 return bfd_reloc_ok;
2789 }
2790
2791 static bfd_reloc_status_type
2792 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2793 void *data, asection *input_section,
2794 bfd *output_bfd, char **error_message)
2795 {
2796 /* If this is a relocatable link (output_bfd test tells us), just
2797 call the generic function. Any adjustment will be done at final
2798 link time. */
2799 if (output_bfd != NULL)
2800 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2801 input_section, output_bfd, error_message);
2802
2803 if (error_message != NULL)
2804 {
2805 static char buf[60];
2806 sprintf (buf, "generic linker can't handle %s",
2807 reloc_entry->howto->name);
2808 *error_message = buf;
2809 }
2810 return bfd_reloc_dangerous;
2811 }
2812
2813 /* Track GOT entries needed for a given symbol. We might need more
2814 than one got entry per symbol. */
2815 struct got_entry
2816 {
2817 struct got_entry *next;
2818
2819 /* The symbol addend that we'll be placing in the GOT. */
2820 bfd_vma addend;
2821
2822 /* Unlike other ELF targets, we use separate GOT entries for the same
2823 symbol referenced from different input files. This is to support
2824 automatic multiple TOC/GOT sections, where the TOC base can vary
2825 from one input file to another. After partitioning into TOC groups
2826 we merge entries within the group.
2827
2828 Point to the BFD owning this GOT entry. */
2829 bfd *owner;
2830
2831 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2832 TLS_TPREL or TLS_DTPREL for tls entries. */
2833 unsigned char tls_type;
2834
2835 /* Non-zero if got.ent points to real entry. */
2836 unsigned char is_indirect;
2837
2838 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2839 union
2840 {
2841 bfd_signed_vma refcount;
2842 bfd_vma offset;
2843 struct got_entry *ent;
2844 } got;
2845 };
2846
2847 /* The same for PLT. */
2848 struct plt_entry
2849 {
2850 struct plt_entry *next;
2851
2852 bfd_vma addend;
2853
2854 union
2855 {
2856 bfd_signed_vma refcount;
2857 bfd_vma offset;
2858 } plt;
2859 };
2860
2861 struct ppc64_elf_obj_tdata
2862 {
2863 struct elf_obj_tdata elf;
2864
2865 /* Shortcuts to dynamic linker sections. */
2866 asection *got;
2867 asection *relgot;
2868
2869 /* Used during garbage collection. We attach global symbols defined
2870 on removed .opd entries to this section so that the sym is removed. */
2871 asection *deleted_section;
2872
2873 /* TLS local dynamic got entry handling. Support for multiple GOT
2874 sections means we potentially need one of these for each input bfd. */
2875 struct got_entry tlsld_got;
2876
2877 union {
2878 /* A copy of relocs before they are modified for --emit-relocs. */
2879 Elf_Internal_Rela *relocs;
2880
2881 /* Section contents. */
2882 bfd_byte *contents;
2883 } opd;
2884
2885 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2886 the reloc to be in the range -32768 to 32767. */
2887 unsigned int has_small_toc_reloc : 1;
2888
2889 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2890 instruction not one we handle. */
2891 unsigned int unexpected_toc_insn : 1;
2892 };
2893
2894 #define ppc64_elf_tdata(bfd) \
2895 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2896
2897 #define ppc64_tlsld_got(bfd) \
2898 (&ppc64_elf_tdata (bfd)->tlsld_got)
2899
2900 #define is_ppc64_elf(bfd) \
2901 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2902 && elf_object_id (bfd) == PPC64_ELF_DATA)
2903
2904 /* Override the generic function because we store some extras. */
2905
2906 static bfd_boolean
2907 ppc64_elf_mkobject (bfd *abfd)
2908 {
2909 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2910 PPC64_ELF_DATA);
2911 }
2912
2913 /* Fix bad default arch selected for a 64 bit input bfd when the
2914 default is 32 bit. Also select arch based on apuinfo. */
2915
2916 static bfd_boolean
2917 ppc64_elf_object_p (bfd *abfd)
2918 {
2919 if (!abfd->arch_info->the_default)
2920 return TRUE;
2921
2922 if (abfd->arch_info->bits_per_word == 32)
2923 {
2924 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2925
2926 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2927 {
2928 /* Relies on arch after 32 bit default being 64 bit default. */
2929 abfd->arch_info = abfd->arch_info->next;
2930 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2931 }
2932 }
2933 return _bfd_elf_ppc_set_arch (abfd);
2934 }
2935
2936 /* Support for core dump NOTE sections. */
2937
2938 static bfd_boolean
2939 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2940 {
2941 size_t offset, size;
2942
2943 if (note->descsz != 504)
2944 return FALSE;
2945
2946 /* pr_cursig */
2947 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2948
2949 /* pr_pid */
2950 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2951
2952 /* pr_reg */
2953 offset = 112;
2954 size = 384;
2955
2956 /* Make a ".reg/999" section. */
2957 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2958 size, note->descpos + offset);
2959 }
2960
2961 static bfd_boolean
2962 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2963 {
2964 if (note->descsz != 136)
2965 return FALSE;
2966
2967 elf_tdata (abfd)->core->pid
2968 = bfd_get_32 (abfd, note->descdata + 24);
2969 elf_tdata (abfd)->core->program
2970 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2971 elf_tdata (abfd)->core->command
2972 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2973
2974 return TRUE;
2975 }
2976
2977 static char *
2978 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2979 ...)
2980 {
2981 switch (note_type)
2982 {
2983 default:
2984 return NULL;
2985
2986 case NT_PRPSINFO:
2987 {
2988 char data[136];
2989 va_list ap;
2990
2991 va_start (ap, note_type);
2992 memset (data, 0, sizeof (data));
2993 strncpy (data + 40, va_arg (ap, const char *), 16);
2994 strncpy (data + 56, va_arg (ap, const char *), 80);
2995 va_end (ap);
2996 return elfcore_write_note (abfd, buf, bufsiz,
2997 "CORE", note_type, data, sizeof (data));
2998 }
2999
3000 case NT_PRSTATUS:
3001 {
3002 char data[504];
3003 va_list ap;
3004 long pid;
3005 int cursig;
3006 const void *greg;
3007
3008 va_start (ap, note_type);
3009 memset (data, 0, 112);
3010 pid = va_arg (ap, long);
3011 bfd_put_32 (abfd, pid, data + 32);
3012 cursig = va_arg (ap, int);
3013 bfd_put_16 (abfd, cursig, data + 12);
3014 greg = va_arg (ap, const void *);
3015 memcpy (data + 112, greg, 384);
3016 memset (data + 496, 0, 8);
3017 va_end (ap);
3018 return elfcore_write_note (abfd, buf, bufsiz,
3019 "CORE", note_type, data, sizeof (data));
3020 }
3021 }
3022 }
3023
3024 /* Add extra PPC sections. */
3025
3026 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3027 {
3028 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3029 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3030 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3031 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3032 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3033 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3034 { NULL, 0, 0, 0, 0 }
3035 };
3036
3037 enum _ppc64_sec_type {
3038 sec_normal = 0,
3039 sec_opd = 1,
3040 sec_toc = 2
3041 };
3042
3043 struct _ppc64_elf_section_data
3044 {
3045 struct bfd_elf_section_data elf;
3046
3047 union
3048 {
3049 /* An array with one entry for each opd function descriptor,
3050 and some spares since opd entries may be either 16 or 24 bytes. */
3051 #define OPD_NDX(OFF) ((OFF) >> 4)
3052 struct _opd_sec_data
3053 {
3054 /* Points to the function code section for local opd entries. */
3055 asection **func_sec;
3056
3057 /* After editing .opd, adjust references to opd local syms. */
3058 long *adjust;
3059 } opd;
3060
3061 /* An array for toc sections, indexed by offset/8. */
3062 struct _toc_sec_data
3063 {
3064 /* Specifies the relocation symbol index used at a given toc offset. */
3065 unsigned *symndx;
3066
3067 /* And the relocation addend. */
3068 bfd_vma *add;
3069 } toc;
3070 } u;
3071
3072 enum _ppc64_sec_type sec_type:2;
3073
3074 /* Flag set when small branches are detected. Used to
3075 select suitable defaults for the stub group size. */
3076 unsigned int has_14bit_branch:1;
3077 };
3078
3079 #define ppc64_elf_section_data(sec) \
3080 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3081
3082 static bfd_boolean
3083 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3084 {
3085 if (!sec->used_by_bfd)
3086 {
3087 struct _ppc64_elf_section_data *sdata;
3088 bfd_size_type amt = sizeof (*sdata);
3089
3090 sdata = bfd_zalloc (abfd, amt);
3091 if (sdata == NULL)
3092 return FALSE;
3093 sec->used_by_bfd = sdata;
3094 }
3095
3096 return _bfd_elf_new_section_hook (abfd, sec);
3097 }
3098
3099 static struct _opd_sec_data *
3100 get_opd_info (asection * sec)
3101 {
3102 if (sec != NULL
3103 && ppc64_elf_section_data (sec) != NULL
3104 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3105 return &ppc64_elf_section_data (sec)->u.opd;
3106 return NULL;
3107 }
3108 \f
3109 /* Parameters for the qsort hook. */
3110 static bfd_boolean synthetic_relocatable;
3111 static asection *synthetic_opd;
3112
3113 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3114
3115 static int
3116 compare_symbols (const void *ap, const void *bp)
3117 {
3118 const asymbol *a = * (const asymbol **) ap;
3119 const asymbol *b = * (const asymbol **) bp;
3120
3121 /* Section symbols first. */
3122 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3123 return -1;
3124 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3125 return 1;
3126
3127 /* then .opd symbols. */
3128 if (synthetic_opd != NULL)
3129 {
3130 if (strcmp (a->section->name, ".opd") == 0
3131 && strcmp (b->section->name, ".opd") != 0)
3132 return -1;
3133 if (strcmp (a->section->name, ".opd") != 0
3134 && strcmp (b->section->name, ".opd") == 0)
3135 return 1;
3136 }
3137
3138 /* then other code symbols. */
3139 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3140 == (SEC_CODE | SEC_ALLOC)
3141 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3142 != (SEC_CODE | SEC_ALLOC))
3143 return -1;
3144
3145 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC)
3147 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3148 == (SEC_CODE | SEC_ALLOC))
3149 return 1;
3150
3151 if (synthetic_relocatable)
3152 {
3153 if (a->section->id < b->section->id)
3154 return -1;
3155
3156 if (a->section->id > b->section->id)
3157 return 1;
3158 }
3159
3160 if (a->value + a->section->vma < b->value + b->section->vma)
3161 return -1;
3162
3163 if (a->value + a->section->vma > b->value + b->section->vma)
3164 return 1;
3165
3166 /* For syms with the same value, prefer strong dynamic global function
3167 syms over other syms. */
3168 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3172 return 1;
3173
3174 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3175 return -1;
3176
3177 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3178 return 1;
3179
3180 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3181 return -1;
3182
3183 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3184 return 1;
3185
3186 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3187 return -1;
3188
3189 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3190 return 1;
3191
3192 return a > b;
3193 }
3194
3195 /* Search SYMS for a symbol of the given VALUE. */
3196
3197 static asymbol *
3198 sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3199 {
3200 long mid;
3201
3202 if (id == (unsigned) -1)
3203 {
3204 while (lo < hi)
3205 {
3206 mid = (lo + hi) >> 1;
3207 if (syms[mid]->value + syms[mid]->section->vma < value)
3208 lo = mid + 1;
3209 else if (syms[mid]->value + syms[mid]->section->vma > value)
3210 hi = mid;
3211 else
3212 return syms[mid];
3213 }
3214 }
3215 else
3216 {
3217 while (lo < hi)
3218 {
3219 mid = (lo + hi) >> 1;
3220 if (syms[mid]->section->id < id)
3221 lo = mid + 1;
3222 else if (syms[mid]->section->id > id)
3223 hi = mid;
3224 else if (syms[mid]->value < value)
3225 lo = mid + 1;
3226 else if (syms[mid]->value > value)
3227 hi = mid;
3228 else
3229 return syms[mid];
3230 }
3231 }
3232 return NULL;
3233 }
3234
3235 static bfd_boolean
3236 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3237 {
3238 bfd_vma vma = *(bfd_vma *) ptr;
3239 return ((section->flags & SEC_ALLOC) != 0
3240 && section->vma <= vma
3241 && vma < section->vma + section->size);
3242 }
3243
3244 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3245 entry syms. Also generate @plt symbols for the glink branch table.
3246 Returns count of synthetic symbols in RET or -1 on error. */
3247
3248 static long
3249 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3250 long static_count, asymbol **static_syms,
3251 long dyn_count, asymbol **dyn_syms,
3252 asymbol **ret)
3253 {
3254 asymbol *s;
3255 long i;
3256 long count;
3257 char *names;
3258 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3259 asection *opd = NULL;
3260 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3261 asymbol **syms;
3262 int abi = abiversion (abfd);
3263
3264 *ret = NULL;
3265
3266 if (abi < 2)
3267 {
3268 opd = bfd_get_section_by_name (abfd, ".opd");
3269 if (opd == NULL && abi == 1)
3270 return 0;
3271 }
3272
3273 symcount = static_count;
3274 if (!relocatable)
3275 symcount += dyn_count;
3276 if (symcount == 0)
3277 return 0;
3278
3279 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3280 if (syms == NULL)
3281 return -1;
3282
3283 if (!relocatable && static_count != 0 && dyn_count != 0)
3284 {
3285 /* Use both symbol tables. */
3286 memcpy (syms, static_syms, static_count * sizeof (*syms));
3287 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3288 }
3289 else if (!relocatable && static_count == 0)
3290 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3291 else
3292 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3293
3294 synthetic_relocatable = relocatable;
3295 synthetic_opd = opd;
3296 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3297
3298 if (!relocatable && symcount > 1)
3299 {
3300 long j;
3301 /* Trim duplicate syms, since we may have merged the normal and
3302 dynamic symbols. Actually, we only care about syms that have
3303 different values, so trim any with the same value. */
3304 for (i = 1, j = 1; i < symcount; ++i)
3305 if (syms[i - 1]->value + syms[i - 1]->section->vma
3306 != syms[i]->value + syms[i]->section->vma)
3307 syms[j++] = syms[i];
3308 symcount = j;
3309 }
3310
3311 i = 0;
3312 /* Note that here and in compare_symbols we can't compare opd and
3313 sym->section directly. With separate debug info files, the
3314 symbols will be extracted from the debug file while abfd passed
3315 to this function is the real binary. */
3316 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3317 ++i;
3318 codesecsym = i;
3319
3320 for (; i < symcount; ++i)
3321 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3322 != (SEC_CODE | SEC_ALLOC))
3323 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3324 break;
3325 codesecsymend = i;
3326
3327 for (; i < symcount; ++i)
3328 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3329 break;
3330 secsymend = i;
3331
3332 if (opd != NULL)
3333 for (; i < symcount; ++i)
3334 if (strcmp (syms[i]->section->name, ".opd") != 0)
3335 break;
3336 opdsymend = i;
3337
3338 for (; i < symcount; ++i)
3339 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3340 != (SEC_CODE | SEC_ALLOC))
3341 break;
3342 symcount = i;
3343
3344 count = 0;
3345
3346 if (relocatable)
3347 {
3348 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3349 arelent *r;
3350 size_t size;
3351 long relcount;
3352
3353 if (opdsymend == secsymend)
3354 goto done;
3355
3356 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3357 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3358 if (relcount == 0)
3359 goto done;
3360
3361 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3362 {
3363 count = -1;
3364 goto done;
3365 }
3366
3367 size = 0;
3368 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3369 {
3370 asymbol *sym;
3371
3372 while (r < opd->relocation + relcount
3373 && r->address < syms[i]->value + opd->vma)
3374 ++r;
3375
3376 if (r == opd->relocation + relcount)
3377 break;
3378
3379 if (r->address != syms[i]->value + opd->vma)
3380 continue;
3381
3382 if (r->howto->type != R_PPC64_ADDR64)
3383 continue;
3384
3385 sym = *r->sym_ptr_ptr;
3386 if (!sym_exists_at (syms, opdsymend, symcount,
3387 sym->section->id, sym->value + r->addend))
3388 {
3389 ++count;
3390 size += sizeof (asymbol);
3391 size += strlen (syms[i]->name) + 2;
3392 }
3393 }
3394
3395 if (size == 0)
3396 goto done;
3397 s = *ret = bfd_malloc (size);
3398 if (s == NULL)
3399 {
3400 count = -1;
3401 goto done;
3402 }
3403
3404 names = (char *) (s + count);
3405
3406 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3407 {
3408 asymbol *sym;
3409
3410 while (r < opd->relocation + relcount
3411 && r->address < syms[i]->value + opd->vma)
3412 ++r;
3413
3414 if (r == opd->relocation + relcount)
3415 break;
3416
3417 if (r->address != syms[i]->value + opd->vma)
3418 continue;
3419
3420 if (r->howto->type != R_PPC64_ADDR64)
3421 continue;
3422
3423 sym = *r->sym_ptr_ptr;
3424 if (!sym_exists_at (syms, opdsymend, symcount,
3425 sym->section->id, sym->value + r->addend))
3426 {
3427 size_t len;
3428
3429 *s = *syms[i];
3430 s->flags |= BSF_SYNTHETIC;
3431 s->section = sym->section;
3432 s->value = sym->value + r->addend;
3433 s->name = names;
3434 *names++ = '.';
3435 len = strlen (syms[i]->name);
3436 memcpy (names, syms[i]->name, len + 1);
3437 names += len + 1;
3438 /* Have udata.p point back to the original symbol this
3439 synthetic symbol was derived from. */
3440 s->udata.p = syms[i];
3441 s++;
3442 }
3443 }
3444 }
3445 else
3446 {
3447 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3448 bfd_byte *contents = NULL;
3449 size_t size;
3450 long plt_count = 0;
3451 bfd_vma glink_vma = 0, resolv_vma = 0;
3452 asection *dynamic, *glink = NULL, *relplt = NULL;
3453 arelent *p;
3454
3455 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3456 {
3457 free_contents_and_exit_err:
3458 count = -1;
3459 free_contents_and_exit:
3460 if (contents)
3461 free (contents);
3462 goto done;
3463 }
3464
3465 size = 0;
3466 for (i = secsymend; i < opdsymend; ++i)
3467 {
3468 bfd_vma ent;
3469
3470 /* Ignore bogus symbols. */
3471 if (syms[i]->value > opd->size - 8)
3472 continue;
3473
3474 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3475 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3476 {
3477 ++count;
3478 size += sizeof (asymbol);
3479 size += strlen (syms[i]->name) + 2;
3480 }
3481 }
3482
3483 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3484 if (dyn_count != 0
3485 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3486 {
3487 bfd_byte *dynbuf, *extdyn, *extdynend;
3488 size_t extdynsize;
3489 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3490
3491 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3492 goto free_contents_and_exit_err;
3493
3494 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3495 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3496
3497 extdyn = dynbuf;
3498 extdynend = extdyn + dynamic->size;
3499 for (; extdyn < extdynend; extdyn += extdynsize)
3500 {
3501 Elf_Internal_Dyn dyn;
3502 (*swap_dyn_in) (abfd, extdyn, &dyn);
3503
3504 if (dyn.d_tag == DT_NULL)
3505 break;
3506
3507 if (dyn.d_tag == DT_PPC64_GLINK)
3508 {
3509 /* The first glink stub starts at offset 32; see
3510 comment in ppc64_elf_finish_dynamic_sections. */
3511 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3512 /* The .glink section usually does not survive the final
3513 link; search for the section (usually .text) where the
3514 glink stubs now reside. */
3515 glink = bfd_sections_find_if (abfd, section_covers_vma,
3516 &glink_vma);
3517 break;
3518 }
3519 }
3520
3521 free (dynbuf);
3522 }
3523
3524 if (glink != NULL)
3525 {
3526 /* Determine __glink trampoline by reading the relative branch
3527 from the first glink stub. */
3528 bfd_byte buf[4];
3529 unsigned int off = 0;
3530
3531 while (bfd_get_section_contents (abfd, glink, buf,
3532 glink_vma + off - glink->vma, 4))
3533 {
3534 unsigned int insn = bfd_get_32 (abfd, buf);
3535 insn ^= B_DOT;
3536 if ((insn & ~0x3fffffc) == 0)
3537 {
3538 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3539 break;
3540 }
3541 off += 4;
3542 if (off > 4)
3543 break;
3544 }
3545
3546 if (resolv_vma)
3547 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3548
3549 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3550 if (relplt != NULL)
3551 {
3552 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3553 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3554 goto free_contents_and_exit_err;
3555
3556 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3557 size += plt_count * sizeof (asymbol);
3558
3559 p = relplt->relocation;
3560 for (i = 0; i < plt_count; i++, p++)
3561 {
3562 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3563 if (p->addend != 0)
3564 size += sizeof ("+0x") - 1 + 16;
3565 }
3566 }
3567 }
3568
3569 if (size == 0)
3570 goto free_contents_and_exit;
3571 s = *ret = bfd_malloc (size);
3572 if (s == NULL)
3573 goto free_contents_and_exit_err;
3574
3575 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3576
3577 for (i = secsymend; i < opdsymend; ++i)
3578 {
3579 bfd_vma ent;
3580
3581 if (syms[i]->value > opd->size - 8)
3582 continue;
3583
3584 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3585 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3586 {
3587 long lo, hi;
3588 size_t len;
3589 asection *sec = abfd->sections;
3590
3591 *s = *syms[i];
3592 lo = codesecsym;
3593 hi = codesecsymend;
3594 while (lo < hi)
3595 {
3596 long mid = (lo + hi) >> 1;
3597 if (syms[mid]->section->vma < ent)
3598 lo = mid + 1;
3599 else if (syms[mid]->section->vma > ent)
3600 hi = mid;
3601 else
3602 {
3603 sec = syms[mid]->section;
3604 break;
3605 }
3606 }
3607
3608 if (lo >= hi && lo > codesecsym)
3609 sec = syms[lo - 1]->section;
3610
3611 for (; sec != NULL; sec = sec->next)
3612 {
3613 if (sec->vma > ent)
3614 break;
3615 /* SEC_LOAD may not be set if SEC is from a separate debug
3616 info file. */
3617 if ((sec->flags & SEC_ALLOC) == 0)
3618 break;
3619 if ((sec->flags & SEC_CODE) != 0)
3620 s->section = sec;
3621 }
3622 s->flags |= BSF_SYNTHETIC;
3623 s->value = ent - s->section->vma;
3624 s->name = names;
3625 *names++ = '.';
3626 len = strlen (syms[i]->name);
3627 memcpy (names, syms[i]->name, len + 1);
3628 names += len + 1;
3629 /* Have udata.p point back to the original symbol this
3630 synthetic symbol was derived from. */
3631 s->udata.p = syms[i];
3632 s++;
3633 }
3634 }
3635 free (contents);
3636
3637 if (glink != NULL && relplt != NULL)
3638 {
3639 if (resolv_vma)
3640 {
3641 /* Add a symbol for the main glink trampoline. */
3642 memset (s, 0, sizeof *s);
3643 s->the_bfd = abfd;
3644 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3645 s->section = glink;
3646 s->value = resolv_vma - glink->vma;
3647 s->name = names;
3648 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3649 names += sizeof ("__glink_PLTresolve");
3650 s++;
3651 count++;
3652 }
3653
3654 /* FIXME: It would be very much nicer to put sym@plt on the
3655 stub rather than on the glink branch table entry. The
3656 objdump disassembler would then use a sensible symbol
3657 name on plt calls. The difficulty in doing so is
3658 a) finding the stubs, and,
3659 b) matching stubs against plt entries, and,
3660 c) there can be multiple stubs for a given plt entry.
3661
3662 Solving (a) could be done by code scanning, but older
3663 ppc64 binaries used different stubs to current code.
3664 (b) is the tricky one since you need to known the toc
3665 pointer for at least one function that uses a pic stub to
3666 be able to calculate the plt address referenced.
3667 (c) means gdb would need to set multiple breakpoints (or
3668 find the glink branch itself) when setting breakpoints
3669 for pending shared library loads. */
3670 p = relplt->relocation;
3671 for (i = 0; i < plt_count; i++, p++)
3672 {
3673 size_t len;
3674
3675 *s = **p->sym_ptr_ptr;
3676 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3677 we are defining a symbol, ensure one of them is set. */
3678 if ((s->flags & BSF_LOCAL) == 0)
3679 s->flags |= BSF_GLOBAL;
3680 s->flags |= BSF_SYNTHETIC;
3681 s->section = glink;
3682 s->value = glink_vma - glink->vma;
3683 s->name = names;
3684 s->udata.p = NULL;
3685 len = strlen ((*p->sym_ptr_ptr)->name);
3686 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3687 names += len;
3688 if (p->addend != 0)
3689 {
3690 memcpy (names, "+0x", sizeof ("+0x") - 1);
3691 names += sizeof ("+0x") - 1;
3692 bfd_sprintf_vma (abfd, names, p->addend);
3693 names += strlen (names);
3694 }
3695 memcpy (names, "@plt", sizeof ("@plt"));
3696 names += sizeof ("@plt");
3697 s++;
3698 if (abi < 2)
3699 {
3700 glink_vma += 8;
3701 if (i >= 0x8000)
3702 glink_vma += 4;
3703 }
3704 else
3705 glink_vma += 4;
3706 }
3707 count += plt_count;
3708 }
3709 }
3710
3711 done:
3712 free (syms);
3713 return count;
3714 }
3715 \f
3716 /* The following functions are specific to the ELF linker, while
3717 functions above are used generally. Those named ppc64_elf_* are
3718 called by the main ELF linker code. They appear in this file more
3719 or less in the order in which they are called. eg.
3720 ppc64_elf_check_relocs is called early in the link process,
3721 ppc64_elf_finish_dynamic_sections is one of the last functions
3722 called.
3723
3724 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3725 functions have both a function code symbol and a function descriptor
3726 symbol. A call to foo in a relocatable object file looks like:
3727
3728 . .text
3729 . x:
3730 . bl .foo
3731 . nop
3732
3733 The function definition in another object file might be:
3734
3735 . .section .opd
3736 . foo: .quad .foo
3737 . .quad .TOC.@tocbase
3738 . .quad 0
3739 .
3740 . .text
3741 . .foo: blr
3742
3743 When the linker resolves the call during a static link, the branch
3744 unsurprisingly just goes to .foo and the .opd information is unused.
3745 If the function definition is in a shared library, things are a little
3746 different: The call goes via a plt call stub, the opd information gets
3747 copied to the plt, and the linker patches the nop.
3748
3749 . x:
3750 . bl .foo_stub
3751 . ld 2,40(1)
3752 .
3753 .
3754 . .foo_stub:
3755 . std 2,40(1) # in practice, the call stub
3756 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3757 . addi 11,11,Lfoo@toc@l # this is the general idea
3758 . ld 12,0(11)
3759 . ld 2,8(11)
3760 . mtctr 12
3761 . ld 11,16(11)
3762 . bctr
3763 .
3764 . .section .plt
3765 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3766
3767 The "reloc ()" notation is supposed to indicate that the linker emits
3768 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3769 copying.
3770
3771 What are the difficulties here? Well, firstly, the relocations
3772 examined by the linker in check_relocs are against the function code
3773 sym .foo, while the dynamic relocation in the plt is emitted against
3774 the function descriptor symbol, foo. Somewhere along the line, we need
3775 to carefully copy dynamic link information from one symbol to the other.
3776 Secondly, the generic part of the elf linker will make .foo a dynamic
3777 symbol as is normal for most other backends. We need foo dynamic
3778 instead, at least for an application final link. However, when
3779 creating a shared library containing foo, we need to have both symbols
3780 dynamic so that references to .foo are satisfied during the early
3781 stages of linking. Otherwise the linker might decide to pull in a
3782 definition from some other object, eg. a static library.
3783
3784 Update: As of August 2004, we support a new convention. Function
3785 calls may use the function descriptor symbol, ie. "bl foo". This
3786 behaves exactly as "bl .foo". */
3787
3788 /* Of those relocs that might be copied as dynamic relocs, this function
3789 selects those that must be copied when linking a shared library,
3790 even when the symbol is local. */
3791
3792 static int
3793 must_be_dyn_reloc (struct bfd_link_info *info,
3794 enum elf_ppc64_reloc_type r_type)
3795 {
3796 switch (r_type)
3797 {
3798 default:
3799 return 1;
3800
3801 case R_PPC64_REL32:
3802 case R_PPC64_REL64:
3803 case R_PPC64_REL30:
3804 return 0;
3805
3806 case R_PPC64_TPREL16:
3807 case R_PPC64_TPREL16_LO:
3808 case R_PPC64_TPREL16_HI:
3809 case R_PPC64_TPREL16_HA:
3810 case R_PPC64_TPREL16_DS:
3811 case R_PPC64_TPREL16_LO_DS:
3812 case R_PPC64_TPREL16_HIGH:
3813 case R_PPC64_TPREL16_HIGHA:
3814 case R_PPC64_TPREL16_HIGHER:
3815 case R_PPC64_TPREL16_HIGHERA:
3816 case R_PPC64_TPREL16_HIGHEST:
3817 case R_PPC64_TPREL16_HIGHESTA:
3818 case R_PPC64_TPREL64:
3819 return !bfd_link_executable (info);
3820 }
3821 }
3822
3823 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3824 copying dynamic variables from a shared lib into an app's dynbss
3825 section, and instead use a dynamic relocation to point into the
3826 shared lib. With code that gcc generates, it's vital that this be
3827 enabled; In the PowerPC64 ABI, the address of a function is actually
3828 the address of a function descriptor, which resides in the .opd
3829 section. gcc uses the descriptor directly rather than going via the
3830 GOT as some other ABI's do, which means that initialized function
3831 pointers must reference the descriptor. Thus, a function pointer
3832 initialized to the address of a function in a shared library will
3833 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3834 redefines the function descriptor symbol to point to the copy. This
3835 presents a problem as a plt entry for that function is also
3836 initialized from the function descriptor symbol and the copy reloc
3837 may not be initialized first. */
3838 #define ELIMINATE_COPY_RELOCS 1
3839
3840 /* Section name for stubs is the associated section name plus this
3841 string. */
3842 #define STUB_SUFFIX ".stub"
3843
3844 /* Linker stubs.
3845 ppc_stub_long_branch:
3846 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3847 destination, but a 24 bit branch in a stub section will reach.
3848 . b dest
3849
3850 ppc_stub_plt_branch:
3851 Similar to the above, but a 24 bit branch in the stub section won't
3852 reach its destination.
3853 . addis %r11,%r2,xxx@toc@ha
3854 . ld %r12,xxx@toc@l(%r11)
3855 . mtctr %r12
3856 . bctr
3857
3858 ppc_stub_plt_call:
3859 Used to call a function in a shared library. If it so happens that
3860 the plt entry referenced crosses a 64k boundary, then an extra
3861 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3862 . std %r2,40(%r1)
3863 . addis %r11,%r2,xxx@toc@ha
3864 . ld %r12,xxx+0@toc@l(%r11)
3865 . mtctr %r12
3866 . ld %r2,xxx+8@toc@l(%r11)
3867 . ld %r11,xxx+16@toc@l(%r11)
3868 . bctr
3869
3870 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3871 code to adjust the value and save r2 to support multiple toc sections.
3872 A ppc_stub_long_branch with an r2 offset looks like:
3873 . std %r2,40(%r1)
3874 . addis %r2,%r2,off@ha
3875 . addi %r2,%r2,off@l
3876 . b dest
3877
3878 A ppc_stub_plt_branch with an r2 offset looks like:
3879 . std %r2,40(%r1)
3880 . addis %r11,%r2,xxx@toc@ha
3881 . ld %r12,xxx@toc@l(%r11)
3882 . addis %r2,%r2,off@ha
3883 . addi %r2,%r2,off@l
3884 . mtctr %r12
3885 . bctr
3886
3887 In cases where the "addis" instruction would add zero, the "addis" is
3888 omitted and following instructions modified slightly in some cases.
3889 */
3890
3891 enum ppc_stub_type {
3892 ppc_stub_none,
3893 ppc_stub_long_branch,
3894 ppc_stub_long_branch_r2off,
3895 ppc_stub_plt_branch,
3896 ppc_stub_plt_branch_r2off,
3897 ppc_stub_plt_call,
3898 ppc_stub_plt_call_r2save,
3899 ppc_stub_global_entry,
3900 ppc_stub_save_res
3901 };
3902
3903 /* Information on stub grouping. */
3904 struct map_stub
3905 {
3906 /* The stub section. */
3907 asection *stub_sec;
3908 /* This is the section to which stubs in the group will be attached. */
3909 asection *link_sec;
3910 /* Next group. */
3911 struct map_stub *next;
3912 /* Whether to emit a copy of register save/restore functions in this
3913 group. */
3914 int needs_save_res;
3915 };
3916
3917 struct ppc_stub_hash_entry {
3918
3919 /* Base hash table entry structure. */
3920 struct bfd_hash_entry root;
3921
3922 enum ppc_stub_type stub_type;
3923
3924 /* Group information. */
3925 struct map_stub *group;
3926
3927 /* Offset within stub_sec of the beginning of this stub. */
3928 bfd_vma stub_offset;
3929
3930 /* Given the symbol's value and its section we can determine its final
3931 value when building the stubs (so the stub knows where to jump. */
3932 bfd_vma target_value;
3933 asection *target_section;
3934
3935 /* The symbol table entry, if any, that this was derived from. */
3936 struct ppc_link_hash_entry *h;
3937 struct plt_entry *plt_ent;
3938
3939 /* Symbol st_other. */
3940 unsigned char other;
3941 };
3942
3943 struct ppc_branch_hash_entry {
3944
3945 /* Base hash table entry structure. */
3946 struct bfd_hash_entry root;
3947
3948 /* Offset within branch lookup table. */
3949 unsigned int offset;
3950
3951 /* Generation marker. */
3952 unsigned int iter;
3953 };
3954
3955 /* Used to track dynamic relocations for local symbols. */
3956 struct ppc_dyn_relocs
3957 {
3958 struct ppc_dyn_relocs *next;
3959
3960 /* The input section of the reloc. */
3961 asection *sec;
3962
3963 /* Total number of relocs copied for the input section. */
3964 unsigned int count : 31;
3965
3966 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3967 unsigned int ifunc : 1;
3968 };
3969
3970 struct ppc_link_hash_entry
3971 {
3972 struct elf_link_hash_entry elf;
3973
3974 union {
3975 /* A pointer to the most recently used stub hash entry against this
3976 symbol. */
3977 struct ppc_stub_hash_entry *stub_cache;
3978
3979 /* A pointer to the next symbol starting with a '.' */
3980 struct ppc_link_hash_entry *next_dot_sym;
3981 } u;
3982
3983 /* Track dynamic relocs copied for this symbol. */
3984 struct elf_dyn_relocs *dyn_relocs;
3985
3986 /* Chain of aliases referring to a weakdef. */
3987 struct ppc_link_hash_entry *weakref;
3988
3989 /* Link between function code and descriptor symbols. */
3990 struct ppc_link_hash_entry *oh;
3991
3992 /* Flag function code and descriptor symbols. */
3993 unsigned int is_func:1;
3994 unsigned int is_func_descriptor:1;
3995 unsigned int fake:1;
3996
3997 /* Whether global opd/toc sym has been adjusted or not.
3998 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3999 should be set for all globals defined in any opd/toc section. */
4000 unsigned int adjust_done:1;
4001
4002 /* Set if this is an out-of-line register save/restore function,
4003 with non-standard calling convention. */
4004 unsigned int save_res:1;
4005
4006 /* Contexts in which symbol is used in the GOT (or TOC).
4007 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
4008 corresponding relocs are encountered during check_relocs.
4009 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
4010 indicate the corresponding GOT entry type is not needed.
4011 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
4012 a TPREL one. We use a separate flag rather than setting TPREL
4013 just for convenience in distinguishing the two cases. */
4014 #define TLS_GD 1 /* GD reloc. */
4015 #define TLS_LD 2 /* LD reloc. */
4016 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
4017 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4018 #define TLS_TLS 16 /* Any TLS reloc. */
4019 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4020 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4021 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4022 unsigned char tls_mask;
4023 };
4024
4025 /* ppc64 ELF linker hash table. */
4026
4027 struct ppc_link_hash_table
4028 {
4029 struct elf_link_hash_table elf;
4030
4031 /* The stub hash table. */
4032 struct bfd_hash_table stub_hash_table;
4033
4034 /* Another hash table for plt_branch stubs. */
4035 struct bfd_hash_table branch_hash_table;
4036
4037 /* Hash table for function prologue tocsave. */
4038 htab_t tocsave_htab;
4039
4040 /* Various options and other info passed from the linker. */
4041 struct ppc64_elf_params *params;
4042
4043 /* The size of sec_info below. */
4044 unsigned int sec_info_arr_size;
4045
4046 /* Per-section array of extra section info. Done this way rather
4047 than as part of ppc64_elf_section_data so we have the info for
4048 non-ppc64 sections. */
4049 struct
4050 {
4051 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4052 bfd_vma toc_off;
4053
4054 union
4055 {
4056 /* The section group that this section belongs to. */
4057 struct map_stub *group;
4058 /* A temp section list pointer. */
4059 asection *list;
4060 } u;
4061 } *sec_info;
4062
4063 /* Linked list of groups. */
4064 struct map_stub *group;
4065
4066 /* Temp used when calculating TOC pointers. */
4067 bfd_vma toc_curr;
4068 bfd *toc_bfd;
4069 asection *toc_first_sec;
4070
4071 /* Used when adding symbols. */
4072 struct ppc_link_hash_entry *dot_syms;
4073
4074 /* Shortcuts to get to dynamic linker sections. */
4075 asection *glink;
4076 asection *sfpr;
4077 asection *brlt;
4078 asection *relbrlt;
4079 asection *glink_eh_frame;
4080
4081 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4082 struct ppc_link_hash_entry *tls_get_addr;
4083 struct ppc_link_hash_entry *tls_get_addr_fd;
4084
4085 /* The size of reliplt used by got entry relocs. */
4086 bfd_size_type got_reli_size;
4087
4088 /* Statistics. */
4089 unsigned long stub_count[ppc_stub_global_entry];
4090
4091 /* Number of stubs against global syms. */
4092 unsigned long stub_globals;
4093
4094 /* Set if we're linking code with function descriptors. */
4095 unsigned int opd_abi:1;
4096
4097 /* Support for multiple toc sections. */
4098 unsigned int do_multi_toc:1;
4099 unsigned int multi_toc_needed:1;
4100 unsigned int second_toc_pass:1;
4101 unsigned int do_toc_opt:1;
4102
4103 /* Set on error. */
4104 unsigned int stub_error:1;
4105
4106 /* Whether func_desc_adjust needs to be run over symbols. */
4107 unsigned int need_func_desc_adj:1;
4108
4109 /* Whether there exist local gnu indirect function resolvers,
4110 referenced by dynamic relocations. */
4111 unsigned int local_ifunc_resolver:1;
4112 unsigned int maybe_local_ifunc_resolver:1;
4113
4114 /* Incremented every time we size stubs. */
4115 unsigned int stub_iteration;
4116
4117 /* Small local sym cache. */
4118 struct sym_cache sym_cache;
4119 };
4120
4121 /* Rename some of the generic section flags to better document how they
4122 are used here. */
4123
4124 /* Nonzero if this section has TLS related relocations. */
4125 #define has_tls_reloc sec_flg0
4126
4127 /* Nonzero if this section has a call to __tls_get_addr. */
4128 #define has_tls_get_addr_call sec_flg1
4129
4130 /* Nonzero if this section has any toc or got relocs. */
4131 #define has_toc_reloc sec_flg2
4132
4133 /* Nonzero if this section has a call to another section that uses
4134 the toc or got. */
4135 #define makes_toc_func_call sec_flg3
4136
4137 /* Recursion protection when determining above flag. */
4138 #define call_check_in_progress sec_flg4
4139 #define call_check_done sec_flg5
4140
4141 /* Get the ppc64 ELF linker hash table from a link_info structure. */
4142
4143 #define ppc_hash_table(p) \
4144 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4145 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4146
4147 #define ppc_stub_hash_lookup(table, string, create, copy) \
4148 ((struct ppc_stub_hash_entry *) \
4149 bfd_hash_lookup ((table), (string), (create), (copy)))
4150
4151 #define ppc_branch_hash_lookup(table, string, create, copy) \
4152 ((struct ppc_branch_hash_entry *) \
4153 bfd_hash_lookup ((table), (string), (create), (copy)))
4154
4155 /* Create an entry in the stub hash table. */
4156
4157 static struct bfd_hash_entry *
4158 stub_hash_newfunc (struct bfd_hash_entry *entry,
4159 struct bfd_hash_table *table,
4160 const char *string)
4161 {
4162 /* Allocate the structure if it has not already been allocated by a
4163 subclass. */
4164 if (entry == NULL)
4165 {
4166 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4167 if (entry == NULL)
4168 return entry;
4169 }
4170
4171 /* Call the allocation method of the superclass. */
4172 entry = bfd_hash_newfunc (entry, table, string);
4173 if (entry != NULL)
4174 {
4175 struct ppc_stub_hash_entry *eh;
4176
4177 /* Initialize the local fields. */
4178 eh = (struct ppc_stub_hash_entry *) entry;
4179 eh->stub_type = ppc_stub_none;
4180 eh->group = NULL;
4181 eh->stub_offset = 0;
4182 eh->target_value = 0;
4183 eh->target_section = NULL;
4184 eh->h = NULL;
4185 eh->plt_ent = NULL;
4186 eh->other = 0;
4187 }
4188
4189 return entry;
4190 }
4191
4192 /* Create an entry in the branch hash table. */
4193
4194 static struct bfd_hash_entry *
4195 branch_hash_newfunc (struct bfd_hash_entry *entry,
4196 struct bfd_hash_table *table,
4197 const char *string)
4198 {
4199 /* Allocate the structure if it has not already been allocated by a
4200 subclass. */
4201 if (entry == NULL)
4202 {
4203 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4204 if (entry == NULL)
4205 return entry;
4206 }
4207
4208 /* Call the allocation method of the superclass. */
4209 entry = bfd_hash_newfunc (entry, table, string);
4210 if (entry != NULL)
4211 {
4212 struct ppc_branch_hash_entry *eh;
4213
4214 /* Initialize the local fields. */
4215 eh = (struct ppc_branch_hash_entry *) entry;
4216 eh->offset = 0;
4217 eh->iter = 0;
4218 }
4219
4220 return entry;
4221 }
4222
4223 /* Create an entry in a ppc64 ELF linker hash table. */
4224
4225 static struct bfd_hash_entry *
4226 link_hash_newfunc (struct bfd_hash_entry *entry,
4227 struct bfd_hash_table *table,
4228 const char *string)
4229 {
4230 /* Allocate the structure if it has not already been allocated by a
4231 subclass. */
4232 if (entry == NULL)
4233 {
4234 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4235 if (entry == NULL)
4236 return entry;
4237 }
4238
4239 /* Call the allocation method of the superclass. */
4240 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4241 if (entry != NULL)
4242 {
4243 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4244
4245 memset (&eh->u.stub_cache, 0,
4246 (sizeof (struct ppc_link_hash_entry)
4247 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4248
4249 /* When making function calls, old ABI code references function entry
4250 points (dot symbols), while new ABI code references the function
4251 descriptor symbol. We need to make any combination of reference and
4252 definition work together, without breaking archive linking.
4253
4254 For a defined function "foo" and an undefined call to "bar":
4255 An old object defines "foo" and ".foo", references ".bar" (possibly
4256 "bar" too).
4257 A new object defines "foo" and references "bar".
4258
4259 A new object thus has no problem with its undefined symbols being
4260 satisfied by definitions in an old object. On the other hand, the
4261 old object won't have ".bar" satisfied by a new object.
4262
4263 Keep a list of newly added dot-symbols. */
4264
4265 if (string[0] == '.')
4266 {
4267 struct ppc_link_hash_table *htab;
4268
4269 htab = (struct ppc_link_hash_table *) table;
4270 eh->u.next_dot_sym = htab->dot_syms;
4271 htab->dot_syms = eh;
4272 }
4273 }
4274
4275 return entry;
4276 }
4277
4278 struct tocsave_entry {
4279 asection *sec;
4280 bfd_vma offset;
4281 };
4282
4283 static hashval_t
4284 tocsave_htab_hash (const void *p)
4285 {
4286 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4287 return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3;
4288 }
4289
4290 static int
4291 tocsave_htab_eq (const void *p1, const void *p2)
4292 {
4293 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4294 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4295 return e1->sec == e2->sec && e1->offset == e2->offset;
4296 }
4297
4298 /* Destroy a ppc64 ELF linker hash table. */
4299
4300 static void
4301 ppc64_elf_link_hash_table_free (bfd *obfd)
4302 {
4303 struct ppc_link_hash_table *htab;
4304
4305 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4306 if (htab->tocsave_htab)
4307 htab_delete (htab->tocsave_htab);
4308 bfd_hash_table_free (&htab->branch_hash_table);
4309 bfd_hash_table_free (&htab->stub_hash_table);
4310 _bfd_elf_link_hash_table_free (obfd);
4311 }
4312
4313 /* Create a ppc64 ELF linker hash table. */
4314
4315 static struct bfd_link_hash_table *
4316 ppc64_elf_link_hash_table_create (bfd *abfd)
4317 {
4318 struct ppc_link_hash_table *htab;
4319 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4320
4321 htab = bfd_zmalloc (amt);
4322 if (htab == NULL)
4323 return NULL;
4324
4325 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4326 sizeof (struct ppc_link_hash_entry),
4327 PPC64_ELF_DATA))
4328 {
4329 free (htab);
4330 return NULL;
4331 }
4332
4333 /* Init the stub hash table too. */
4334 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4335 sizeof (struct ppc_stub_hash_entry)))
4336 {
4337 _bfd_elf_link_hash_table_free (abfd);
4338 return NULL;
4339 }
4340
4341 /* And the branch hash table. */
4342 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4343 sizeof (struct ppc_branch_hash_entry)))
4344 {
4345 bfd_hash_table_free (&htab->stub_hash_table);
4346 _bfd_elf_link_hash_table_free (abfd);
4347 return NULL;
4348 }
4349
4350 htab->tocsave_htab = htab_try_create (1024,
4351 tocsave_htab_hash,
4352 tocsave_htab_eq,
4353 NULL);
4354 if (htab->tocsave_htab == NULL)
4355 {
4356 ppc64_elf_link_hash_table_free (abfd);
4357 return NULL;
4358 }
4359 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4360
4361 /* Initializing two fields of the union is just cosmetic. We really
4362 only care about glist, but when compiled on a 32-bit host the
4363 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4364 debugger inspection of these fields look nicer. */
4365 htab->elf.init_got_refcount.refcount = 0;
4366 htab->elf.init_got_refcount.glist = NULL;
4367 htab->elf.init_plt_refcount.refcount = 0;
4368 htab->elf.init_plt_refcount.glist = NULL;
4369 htab->elf.init_got_offset.offset = 0;
4370 htab->elf.init_got_offset.glist = NULL;
4371 htab->elf.init_plt_offset.offset = 0;
4372 htab->elf.init_plt_offset.glist = NULL;
4373
4374 return &htab->elf.root;
4375 }
4376
4377 /* Create sections for linker generated code. */
4378
4379 static bfd_boolean
4380 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4381 {
4382 struct ppc_link_hash_table *htab;
4383 flagword flags;
4384
4385 htab = ppc_hash_table (info);
4386
4387 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4388 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4389 if (htab->params->save_restore_funcs)
4390 {
4391 /* Create .sfpr for code to save and restore fp regs. */
4392 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4393 flags);
4394 if (htab->sfpr == NULL
4395 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4396 return FALSE;
4397 }
4398
4399 if (bfd_link_relocatable (info))
4400 return TRUE;
4401
4402 /* Create .glink for lazy dynamic linking support. */
4403 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4404 flags);
4405 if (htab->glink == NULL
4406 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4407 return FALSE;
4408
4409 if (!info->no_ld_generated_unwind_info)
4410 {
4411 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4412 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4413 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4414 ".eh_frame",
4415 flags);
4416 if (htab->glink_eh_frame == NULL
4417 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4418 return FALSE;
4419 }
4420
4421 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4422 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4423 if (htab->elf.iplt == NULL
4424 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4425 return FALSE;
4426
4427 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4428 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4429 htab->elf.irelplt
4430 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4431 if (htab->elf.irelplt == NULL
4432 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4433 return FALSE;
4434
4435 /* Create branch lookup table for plt_branch stubs. */
4436 flags = (SEC_ALLOC | SEC_LOAD
4437 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4438 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4439 flags);
4440 if (htab->brlt == NULL
4441 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4442 return FALSE;
4443
4444 if (!bfd_link_pic (info))
4445 return TRUE;
4446
4447 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4448 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4449 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4450 ".rela.branch_lt",
4451 flags);
4452 if (htab->relbrlt == NULL
4453 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4454 return FALSE;
4455
4456 return TRUE;
4457 }
4458
4459 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4460
4461 bfd_boolean
4462 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4463 struct ppc64_elf_params *params)
4464 {
4465 struct ppc_link_hash_table *htab;
4466
4467 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4468
4469 /* Always hook our dynamic sections into the first bfd, which is the
4470 linker created stub bfd. This ensures that the GOT header is at
4471 the start of the output TOC section. */
4472 htab = ppc_hash_table (info);
4473 htab->elf.dynobj = params->stub_bfd;
4474 htab->params = params;
4475
4476 return create_linkage_sections (htab->elf.dynobj, info);
4477 }
4478
4479 /* Build a name for an entry in the stub hash table. */
4480
4481 static char *
4482 ppc_stub_name (const asection *input_section,
4483 const asection *sym_sec,
4484 const struct ppc_link_hash_entry *h,
4485 const Elf_Internal_Rela *rel)
4486 {
4487 char *stub_name;
4488 ssize_t len;
4489
4490 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4491 offsets from a sym as a branch target? In fact, we could
4492 probably assume the addend is always zero. */
4493 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4494
4495 if (h)
4496 {
4497 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4498 stub_name = bfd_malloc (len);
4499 if (stub_name == NULL)
4500 return stub_name;
4501
4502 len = sprintf (stub_name, "%08x.%s+%x",
4503 input_section->id & 0xffffffff,
4504 h->elf.root.root.string,
4505 (int) rel->r_addend & 0xffffffff);
4506 }
4507 else
4508 {
4509 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4510 stub_name = bfd_malloc (len);
4511 if (stub_name == NULL)
4512 return stub_name;
4513
4514 len = sprintf (stub_name, "%08x.%x:%x+%x",
4515 input_section->id & 0xffffffff,
4516 sym_sec->id & 0xffffffff,
4517 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4518 (int) rel->r_addend & 0xffffffff);
4519 }
4520 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4521 stub_name[len - 2] = 0;
4522 return stub_name;
4523 }
4524
4525 /* Look up an entry in the stub hash. Stub entries are cached because
4526 creating the stub name takes a bit of time. */
4527
4528 static struct ppc_stub_hash_entry *
4529 ppc_get_stub_entry (const asection *input_section,
4530 const asection *sym_sec,
4531 struct ppc_link_hash_entry *h,
4532 const Elf_Internal_Rela *rel,
4533 struct ppc_link_hash_table *htab)
4534 {
4535 struct ppc_stub_hash_entry *stub_entry;
4536 struct map_stub *group;
4537
4538 /* If this input section is part of a group of sections sharing one
4539 stub section, then use the id of the first section in the group.
4540 Stub names need to include a section id, as there may well be
4541 more than one stub used to reach say, printf, and we need to
4542 distinguish between them. */
4543 group = htab->sec_info[input_section->id].u.group;
4544 if (group == NULL)
4545 return NULL;
4546
4547 if (h != NULL && h->u.stub_cache != NULL
4548 && h->u.stub_cache->h == h
4549 && h->u.stub_cache->group == group)
4550 {
4551 stub_entry = h->u.stub_cache;
4552 }
4553 else
4554 {
4555 char *stub_name;
4556
4557 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4558 if (stub_name == NULL)
4559 return NULL;
4560
4561 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4562 stub_name, FALSE, FALSE);
4563 if (h != NULL)
4564 h->u.stub_cache = stub_entry;
4565
4566 free (stub_name);
4567 }
4568
4569 return stub_entry;
4570 }
4571
4572 /* Add a new stub entry to the stub hash. Not all fields of the new
4573 stub entry are initialised. */
4574
4575 static struct ppc_stub_hash_entry *
4576 ppc_add_stub (const char *stub_name,
4577 asection *section,
4578 struct bfd_link_info *info)
4579 {
4580 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4581 struct map_stub *group;
4582 asection *link_sec;
4583 asection *stub_sec;
4584 struct ppc_stub_hash_entry *stub_entry;
4585
4586 group = htab->sec_info[section->id].u.group;
4587 link_sec = group->link_sec;
4588 stub_sec = group->stub_sec;
4589 if (stub_sec == NULL)
4590 {
4591 size_t namelen;
4592 bfd_size_type len;
4593 char *s_name;
4594
4595 namelen = strlen (link_sec->name);
4596 len = namelen + sizeof (STUB_SUFFIX);
4597 s_name = bfd_alloc (htab->params->stub_bfd, len);
4598 if (s_name == NULL)
4599 return NULL;
4600
4601 memcpy (s_name, link_sec->name, namelen);
4602 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4603 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4604 if (stub_sec == NULL)
4605 return NULL;
4606 group->stub_sec = stub_sec;
4607 }
4608
4609 /* Enter this entry into the linker stub hash table. */
4610 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4611 TRUE, FALSE);
4612 if (stub_entry == NULL)
4613 {
4614 /* xgettext:c-format */
4615 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4616 section->owner, stub_name);
4617 return NULL;
4618 }
4619
4620 stub_entry->group = group;
4621 stub_entry->stub_offset = 0;
4622 return stub_entry;
4623 }
4624
4625 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4626 not already done. */
4627
4628 static bfd_boolean
4629 create_got_section (bfd *abfd, struct bfd_link_info *info)
4630 {
4631 asection *got, *relgot;
4632 flagword flags;
4633 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4634
4635 if (!is_ppc64_elf (abfd))
4636 return FALSE;
4637 if (htab == NULL)
4638 return FALSE;
4639
4640 if (!htab->elf.sgot
4641 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4642 return FALSE;
4643
4644 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4645 | SEC_LINKER_CREATED);
4646
4647 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4648 if (!got
4649 || !bfd_set_section_alignment (abfd, got, 3))
4650 return FALSE;
4651
4652 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4653 flags | SEC_READONLY);
4654 if (!relgot
4655 || ! bfd_set_section_alignment (abfd, relgot, 3))
4656 return FALSE;
4657
4658 ppc64_elf_tdata (abfd)->got = got;
4659 ppc64_elf_tdata (abfd)->relgot = relgot;
4660 return TRUE;
4661 }
4662
4663 /* Follow indirect and warning symbol links. */
4664
4665 static inline struct bfd_link_hash_entry *
4666 follow_link (struct bfd_link_hash_entry *h)
4667 {
4668 while (h->type == bfd_link_hash_indirect
4669 || h->type == bfd_link_hash_warning)
4670 h = h->u.i.link;
4671 return h;
4672 }
4673
4674 static inline struct elf_link_hash_entry *
4675 elf_follow_link (struct elf_link_hash_entry *h)
4676 {
4677 return (struct elf_link_hash_entry *) follow_link (&h->root);
4678 }
4679
4680 static inline struct ppc_link_hash_entry *
4681 ppc_follow_link (struct ppc_link_hash_entry *h)
4682 {
4683 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4684 }
4685
4686 /* Merge PLT info on FROM with that on TO. */
4687
4688 static void
4689 move_plt_plist (struct ppc_link_hash_entry *from,
4690 struct ppc_link_hash_entry *to)
4691 {
4692 if (from->elf.plt.plist != NULL)
4693 {
4694 if (to->elf.plt.plist != NULL)
4695 {
4696 struct plt_entry **entp;
4697 struct plt_entry *ent;
4698
4699 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4700 {
4701 struct plt_entry *dent;
4702
4703 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4704 if (dent->addend == ent->addend)
4705 {
4706 dent->plt.refcount += ent->plt.refcount;
4707 *entp = ent->next;
4708 break;
4709 }
4710 if (dent == NULL)
4711 entp = &ent->next;
4712 }
4713 *entp = to->elf.plt.plist;
4714 }
4715
4716 to->elf.plt.plist = from->elf.plt.plist;
4717 from->elf.plt.plist = NULL;
4718 }
4719 }
4720
4721 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4722
4723 static void
4724 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4725 struct elf_link_hash_entry *dir,
4726 struct elf_link_hash_entry *ind)
4727 {
4728 struct ppc_link_hash_entry *edir, *eind;
4729
4730 edir = (struct ppc_link_hash_entry *) dir;
4731 eind = (struct ppc_link_hash_entry *) ind;
4732
4733 edir->is_func |= eind->is_func;
4734 edir->is_func_descriptor |= eind->is_func_descriptor;
4735 edir->tls_mask |= eind->tls_mask;
4736 if (eind->oh != NULL)
4737 edir->oh = ppc_follow_link (eind->oh);
4738
4739 /* If called to transfer flags for a weakdef during processing
4740 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4741 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4742 if (!(ELIMINATE_COPY_RELOCS
4743 && eind->elf.root.type != bfd_link_hash_indirect
4744 && edir->elf.dynamic_adjusted))
4745 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4746
4747 if (edir->elf.versioned != versioned_hidden)
4748 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4749 edir->elf.ref_regular |= eind->elf.ref_regular;
4750 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4751 edir->elf.needs_plt |= eind->elf.needs_plt;
4752 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4753
4754 /* If we were called to copy over info for a weak sym, don't copy
4755 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4756 in order to simplify readonly_dynrelocs and save a field in the
4757 symbol hash entry, but that means dyn_relocs can't be used in any
4758 tests about a specific symbol, or affect other symbol flags which
4759 are then tested.
4760 Chain weakdefs so we can get from the weakdef back to an alias.
4761 The list is circular so that we don't need to use u.weakdef as
4762 well as this list to look at all aliases. */
4763 if (eind->elf.root.type != bfd_link_hash_indirect)
4764 {
4765 struct ppc_link_hash_entry *cur, *add, *next;
4766
4767 add = eind;
4768 do
4769 {
4770 cur = edir->weakref;
4771 if (cur != NULL)
4772 {
4773 do
4774 {
4775 /* We can be called twice for the same symbols.
4776 Don't make multiple loops. */
4777 if (cur == add)
4778 return;
4779 cur = cur->weakref;
4780 } while (cur != edir);
4781 }
4782 next = add->weakref;
4783 if (cur != add)
4784 {
4785 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4786 edir->weakref = add;
4787 }
4788 add = next;
4789 } while (add != NULL && add != eind);
4790 return;
4791 }
4792
4793 /* Copy over any dynamic relocs we may have on the indirect sym. */
4794 if (eind->dyn_relocs != NULL)
4795 {
4796 if (edir->dyn_relocs != NULL)
4797 {
4798 struct elf_dyn_relocs **pp;
4799 struct elf_dyn_relocs *p;
4800
4801 /* Add reloc counts against the indirect sym to the direct sym
4802 list. Merge any entries against the same section. */
4803 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4804 {
4805 struct elf_dyn_relocs *q;
4806
4807 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4808 if (q->sec == p->sec)
4809 {
4810 q->pc_count += p->pc_count;
4811 q->count += p->count;
4812 *pp = p->next;
4813 break;
4814 }
4815 if (q == NULL)
4816 pp = &p->next;
4817 }
4818 *pp = edir->dyn_relocs;
4819 }
4820
4821 edir->dyn_relocs = eind->dyn_relocs;
4822 eind->dyn_relocs = NULL;
4823 }
4824
4825 /* Copy over got entries that we may have already seen to the
4826 symbol which just became indirect. */
4827 if (eind->elf.got.glist != NULL)
4828 {
4829 if (edir->elf.got.glist != NULL)
4830 {
4831 struct got_entry **entp;
4832 struct got_entry *ent;
4833
4834 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4835 {
4836 struct got_entry *dent;
4837
4838 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4839 if (dent->addend == ent->addend
4840 && dent->owner == ent->owner
4841 && dent->tls_type == ent->tls_type)
4842 {
4843 dent->got.refcount += ent->got.refcount;
4844 *entp = ent->next;
4845 break;
4846 }
4847 if (dent == NULL)
4848 entp = &ent->next;
4849 }
4850 *entp = edir->elf.got.glist;
4851 }
4852
4853 edir->elf.got.glist = eind->elf.got.glist;
4854 eind->elf.got.glist = NULL;
4855 }
4856
4857 /* And plt entries. */
4858 move_plt_plist (eind, edir);
4859
4860 if (eind->elf.dynindx != -1)
4861 {
4862 if (edir->elf.dynindx != -1)
4863 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4864 edir->elf.dynstr_index);
4865 edir->elf.dynindx = eind->elf.dynindx;
4866 edir->elf.dynstr_index = eind->elf.dynstr_index;
4867 eind->elf.dynindx = -1;
4868 eind->elf.dynstr_index = 0;
4869 }
4870 }
4871
4872 /* Find the function descriptor hash entry from the given function code
4873 hash entry FH. Link the entries via their OH fields. */
4874
4875 static struct ppc_link_hash_entry *
4876 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4877 {
4878 struct ppc_link_hash_entry *fdh = fh->oh;
4879
4880 if (fdh == NULL)
4881 {
4882 const char *fd_name = fh->elf.root.root.string + 1;
4883
4884 fdh = (struct ppc_link_hash_entry *)
4885 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4886 if (fdh == NULL)
4887 return fdh;
4888
4889 fdh->is_func_descriptor = 1;
4890 fdh->oh = fh;
4891 fh->is_func = 1;
4892 fh->oh = fdh;
4893 }
4894
4895 fdh = ppc_follow_link (fdh);
4896 fdh->is_func_descriptor = 1;
4897 fdh->oh = fh;
4898 return fdh;
4899 }
4900
4901 /* Make a fake function descriptor sym for the undefined code sym FH. */
4902
4903 static struct ppc_link_hash_entry *
4904 make_fdh (struct bfd_link_info *info,
4905 struct ppc_link_hash_entry *fh)
4906 {
4907 bfd *abfd = fh->elf.root.u.undef.abfd;
4908 struct bfd_link_hash_entry *bh = NULL;
4909 struct ppc_link_hash_entry *fdh;
4910 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4911 ? BSF_WEAK
4912 : BSF_GLOBAL);
4913
4914 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4915 fh->elf.root.root.string + 1,
4916 flags, bfd_und_section_ptr, 0,
4917 NULL, FALSE, FALSE, &bh))
4918 return NULL;
4919
4920 fdh = (struct ppc_link_hash_entry *) bh;
4921 fdh->elf.non_elf = 0;
4922 fdh->fake = 1;
4923 fdh->is_func_descriptor = 1;
4924 fdh->oh = fh;
4925 fh->is_func = 1;
4926 fh->oh = fdh;
4927 return fdh;
4928 }
4929
4930 /* Fix function descriptor symbols defined in .opd sections to be
4931 function type. */
4932
4933 static bfd_boolean
4934 ppc64_elf_add_symbol_hook (bfd *ibfd,
4935 struct bfd_link_info *info,
4936 Elf_Internal_Sym *isym,
4937 const char **name,
4938 flagword *flags ATTRIBUTE_UNUSED,
4939 asection **sec,
4940 bfd_vma *value)
4941 {
4942 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4943 && (ibfd->flags & DYNAMIC) == 0
4944 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4945 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4946
4947 if (*sec != NULL
4948 && strcmp ((*sec)->name, ".opd") == 0)
4949 {
4950 asection *code_sec;
4951
4952 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4953 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4954 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4955
4956 /* If the symbol is a function defined in .opd, and the function
4957 code is in a discarded group, let it appear to be undefined. */
4958 if (!bfd_link_relocatable (info)
4959 && (*sec)->reloc_count != 0
4960 && opd_entry_value (*sec, *value, &code_sec, NULL,
4961 FALSE) != (bfd_vma) -1
4962 && discarded_section (code_sec))
4963 {
4964 *sec = bfd_und_section_ptr;
4965 isym->st_shndx = SHN_UNDEF;
4966 }
4967 }
4968 else if (*sec != NULL
4969 && strcmp ((*sec)->name, ".toc") == 0
4970 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4971 {
4972 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4973 if (htab != NULL)
4974 htab->params->object_in_toc = 1;
4975 }
4976
4977 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4978 {
4979 if (abiversion (ibfd) == 0)
4980 set_abiversion (ibfd, 2);
4981 else if (abiversion (ibfd) == 1)
4982 {
4983 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4984 " for ABI version 1\n"), name);
4985 bfd_set_error (bfd_error_bad_value);
4986 return FALSE;
4987 }
4988 }
4989
4990 return TRUE;
4991 }
4992
4993 /* Merge non-visibility st_other attributes: local entry point. */
4994
4995 static void
4996 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4997 const Elf_Internal_Sym *isym,
4998 bfd_boolean definition,
4999 bfd_boolean dynamic)
5000 {
5001 if (definition && !dynamic)
5002 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
5003 | ELF_ST_VISIBILITY (h->other));
5004 }
5005
5006 /* Hook called on merging a symbol. We use this to clear "fake" since
5007 we now have a real symbol. */
5008
5009 static bfd_boolean
5010 ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
5011 const Elf_Internal_Sym *isym ATTRIBUTE_UNUSED,
5012 asection **psec ATTRIBUTE_UNUSED,
5013 bfd_boolean newdef ATTRIBUTE_UNUSED,
5014 bfd_boolean olddef ATTRIBUTE_UNUSED,
5015 bfd *oldbfd ATTRIBUTE_UNUSED,
5016 const asection *oldsec ATTRIBUTE_UNUSED)
5017 {
5018 ((struct ppc_link_hash_entry *) h)->fake = 0;
5019 return TRUE;
5020 }
5021
5022 /* This function makes an old ABI object reference to ".bar" cause the
5023 inclusion of a new ABI object archive that defines "bar".
5024 NAME is a symbol defined in an archive. Return a symbol in the hash
5025 table that might be satisfied by the archive symbols. */
5026
5027 static struct elf_link_hash_entry *
5028 ppc64_elf_archive_symbol_lookup (bfd *abfd,
5029 struct bfd_link_info *info,
5030 const char *name)
5031 {
5032 struct elf_link_hash_entry *h;
5033 char *dot_name;
5034 size_t len;
5035
5036 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5037 if (h != NULL
5038 /* Don't return this sym if it is a fake function descriptor
5039 created by add_symbol_adjust. */
5040 && !((struct ppc_link_hash_entry *) h)->fake)
5041 return h;
5042
5043 if (name[0] == '.')
5044 return h;
5045
5046 len = strlen (name);
5047 dot_name = bfd_alloc (abfd, len + 2);
5048 if (dot_name == NULL)
5049 return (struct elf_link_hash_entry *) 0 - 1;
5050 dot_name[0] = '.';
5051 memcpy (dot_name + 1, name, len + 1);
5052 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5053 bfd_release (abfd, dot_name);
5054 return h;
5055 }
5056
5057 /* This function satisfies all old ABI object references to ".bar" if a
5058 new ABI object defines "bar". Well, at least, undefined dot symbols
5059 are made weak. This stops later archive searches from including an
5060 object if we already have a function descriptor definition. It also
5061 prevents the linker complaining about undefined symbols.
5062 We also check and correct mismatched symbol visibility here. The
5063 most restrictive visibility of the function descriptor and the
5064 function entry symbol is used. */
5065
5066 static bfd_boolean
5067 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5068 {
5069 struct ppc_link_hash_table *htab;
5070 struct ppc_link_hash_entry *fdh;
5071
5072 if (eh->elf.root.type == bfd_link_hash_warning)
5073 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5074
5075 if (eh->elf.root.type == bfd_link_hash_indirect)
5076 return TRUE;
5077
5078 if (eh->elf.root.root.string[0] != '.')
5079 abort ();
5080
5081 htab = ppc_hash_table (info);
5082 if (htab == NULL)
5083 return FALSE;
5084
5085 fdh = lookup_fdh (eh, htab);
5086 if (fdh == NULL
5087 && !bfd_link_relocatable (info)
5088 && (eh->elf.root.type == bfd_link_hash_undefined
5089 || eh->elf.root.type == bfd_link_hash_undefweak)
5090 && eh->elf.ref_regular)
5091 {
5092 /* Make an undefined function descriptor sym, in order to
5093 pull in an --as-needed shared lib. Archives are handled
5094 elsewhere. */
5095 fdh = make_fdh (info, eh);
5096 if (fdh == NULL)
5097 return FALSE;
5098 }
5099
5100 if (fdh != NULL)
5101 {
5102 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5103 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5104
5105 /* Make both descriptor and entry symbol have the most
5106 constraining visibility of either symbol. */
5107 if (entry_vis < descr_vis)
5108 fdh->elf.other += entry_vis - descr_vis;
5109 else if (entry_vis > descr_vis)
5110 eh->elf.other += descr_vis - entry_vis;
5111
5112 /* Propagate reference flags from entry symbol to function
5113 descriptor symbol. */
5114 fdh->elf.root.non_ir_ref |= eh->elf.root.non_ir_ref;
5115 fdh->elf.ref_regular |= eh->elf.ref_regular;
5116 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5117
5118 if (!fdh->elf.forced_local
5119 && fdh->elf.dynindx == -1
5120 && fdh->elf.versioned != versioned_hidden
5121 && (bfd_link_dll (info)
5122 || fdh->elf.def_dynamic
5123 || fdh->elf.ref_dynamic)
5124 && (eh->elf.ref_regular
5125 || eh->elf.def_regular))
5126 {
5127 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5128 return FALSE;
5129 }
5130 }
5131
5132 return TRUE;
5133 }
5134
5135 /* Set up opd section info and abiversion for IBFD, and process list
5136 of dot-symbols we made in link_hash_newfunc. */
5137
5138 static bfd_boolean
5139 ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5140 {
5141 struct ppc_link_hash_table *htab;
5142 struct ppc_link_hash_entry **p, *eh;
5143 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5144
5145 if (opd != NULL && opd->size != 0)
5146 {
5147 if (abiversion (ibfd) == 0)
5148 set_abiversion (ibfd, 1);
5149 else if (abiversion (ibfd) >= 2)
5150 {
5151 /* xgettext:c-format */
5152 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5153 " version %d\n"),
5154 ibfd, abiversion (ibfd));
5155 bfd_set_error (bfd_error_bad_value);
5156 return FALSE;
5157 }
5158
5159 if ((ibfd->flags & DYNAMIC) == 0
5160 && (opd->flags & SEC_RELOC) != 0
5161 && opd->reloc_count != 0
5162 && !bfd_is_abs_section (opd->output_section))
5163 {
5164 /* Garbage collection needs some extra help with .opd sections.
5165 We don't want to necessarily keep everything referenced by
5166 relocs in .opd, as that would keep all functions. Instead,
5167 if we reference an .opd symbol (a function descriptor), we
5168 want to keep the function code symbol's section. This is
5169 easy for global symbols, but for local syms we need to keep
5170 information about the associated function section. */
5171 bfd_size_type amt;
5172 asection **opd_sym_map;
5173
5174 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5175 opd_sym_map = bfd_zalloc (ibfd, amt);
5176 if (opd_sym_map == NULL)
5177 return FALSE;
5178 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5179 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5180 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5181 }
5182 }
5183
5184 if (!is_ppc64_elf (info->output_bfd))
5185 return TRUE;
5186 htab = ppc_hash_table (info);
5187 if (htab == NULL)
5188 return FALSE;
5189
5190 /* For input files without an explicit abiversion in e_flags
5191 we should have flagged any with symbol st_other bits set
5192 as ELFv1 and above flagged those with .opd as ELFv2.
5193 Set the output abiversion if not yet set, and for any input
5194 still ambiguous, take its abiversion from the output.
5195 Differences in ABI are reported later. */
5196 if (abiversion (info->output_bfd) == 0)
5197 set_abiversion (info->output_bfd, abiversion (ibfd));
5198 else if (abiversion (ibfd) == 0)
5199 set_abiversion (ibfd, abiversion (info->output_bfd));
5200
5201 p = &htab->dot_syms;
5202 while ((eh = *p) != NULL)
5203 {
5204 *p = NULL;
5205 if (&eh->elf == htab->elf.hgot)
5206 ;
5207 else if (htab->elf.hgot == NULL
5208 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5209 htab->elf.hgot = &eh->elf;
5210 else if (abiversion (ibfd) <= 1)
5211 {
5212 htab->need_func_desc_adj = 1;
5213 if (!add_symbol_adjust (eh, info))
5214 return FALSE;
5215 }
5216 p = &eh->u.next_dot_sym;
5217 }
5218 return TRUE;
5219 }
5220
5221 /* Undo hash table changes when an --as-needed input file is determined
5222 not to be needed. */
5223
5224 static bfd_boolean
5225 ppc64_elf_notice_as_needed (bfd *ibfd,
5226 struct bfd_link_info *info,
5227 enum notice_asneeded_action act)
5228 {
5229 if (act == notice_not_needed)
5230 {
5231 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5232
5233 if (htab == NULL)
5234 return FALSE;
5235
5236 htab->dot_syms = NULL;
5237 }
5238 return _bfd_elf_notice_as_needed (ibfd, info, act);
5239 }
5240
5241 /* If --just-symbols against a final linked binary, then assume we need
5242 toc adjusting stubs when calling functions defined there. */
5243
5244 static void
5245 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5246 {
5247 if ((sec->flags & SEC_CODE) != 0
5248 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5249 && is_ppc64_elf (sec->owner))
5250 {
5251 if (abiversion (sec->owner) >= 2
5252 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5253 sec->has_toc_reloc = 1;
5254 }
5255 _bfd_elf_link_just_syms (sec, info);
5256 }
5257
5258 static struct plt_entry **
5259 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5260 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5261 {
5262 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5263 struct plt_entry **local_plt;
5264 unsigned char *local_got_tls_masks;
5265
5266 if (local_got_ents == NULL)
5267 {
5268 bfd_size_type size = symtab_hdr->sh_info;
5269
5270 size *= (sizeof (*local_got_ents)
5271 + sizeof (*local_plt)
5272 + sizeof (*local_got_tls_masks));
5273 local_got_ents = bfd_zalloc (abfd, size);
5274 if (local_got_ents == NULL)
5275 return NULL;
5276 elf_local_got_ents (abfd) = local_got_ents;
5277 }
5278
5279 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5280 {
5281 struct got_entry *ent;
5282
5283 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5284 if (ent->addend == r_addend
5285 && ent->owner == abfd
5286 && ent->tls_type == tls_type)
5287 break;
5288 if (ent == NULL)
5289 {
5290 bfd_size_type amt = sizeof (*ent);
5291 ent = bfd_alloc (abfd, amt);
5292 if (ent == NULL)
5293 return FALSE;
5294 ent->next = local_got_ents[r_symndx];
5295 ent->addend = r_addend;
5296 ent->owner = abfd;
5297 ent->tls_type = tls_type;
5298 ent->is_indirect = FALSE;
5299 ent->got.refcount = 0;
5300 local_got_ents[r_symndx] = ent;
5301 }
5302 ent->got.refcount += 1;
5303 }
5304
5305 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5306 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5307 local_got_tls_masks[r_symndx] |= tls_type;
5308
5309 return local_plt + r_symndx;
5310 }
5311
5312 static bfd_boolean
5313 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5314 {
5315 struct plt_entry *ent;
5316
5317 for (ent = *plist; ent != NULL; ent = ent->next)
5318 if (ent->addend == addend)
5319 break;
5320 if (ent == NULL)
5321 {
5322 bfd_size_type amt = sizeof (*ent);
5323 ent = bfd_alloc (abfd, amt);
5324 if (ent == NULL)
5325 return FALSE;
5326 ent->next = *plist;
5327 ent->addend = addend;
5328 ent->plt.refcount = 0;
5329 *plist = ent;
5330 }
5331 ent->plt.refcount += 1;
5332 return TRUE;
5333 }
5334
5335 static bfd_boolean
5336 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5337 {
5338 return (r_type == R_PPC64_REL24
5339 || r_type == R_PPC64_REL14
5340 || r_type == R_PPC64_REL14_BRTAKEN
5341 || r_type == R_PPC64_REL14_BRNTAKEN
5342 || r_type == R_PPC64_ADDR24
5343 || r_type == R_PPC64_ADDR14
5344 || r_type == R_PPC64_ADDR14_BRTAKEN
5345 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5346 }
5347
5348 /* Look through the relocs for a section during the first phase, and
5349 calculate needed space in the global offset table, procedure
5350 linkage table, and dynamic reloc sections. */
5351
5352 static bfd_boolean
5353 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5354 asection *sec, const Elf_Internal_Rela *relocs)
5355 {
5356 struct ppc_link_hash_table *htab;
5357 Elf_Internal_Shdr *symtab_hdr;
5358 struct elf_link_hash_entry **sym_hashes;
5359 const Elf_Internal_Rela *rel;
5360 const Elf_Internal_Rela *rel_end;
5361 asection *sreloc;
5362 asection **opd_sym_map;
5363 struct elf_link_hash_entry *tga, *dottga;
5364
5365 if (bfd_link_relocatable (info))
5366 return TRUE;
5367
5368 /* Don't do anything special with non-loaded, non-alloced sections.
5369 In particular, any relocs in such sections should not affect GOT
5370 and PLT reference counting (ie. we don't allow them to create GOT
5371 or PLT entries), there's no possibility or desire to optimize TLS
5372 relocs, and there's not much point in propagating relocs to shared
5373 libs that the dynamic linker won't relocate. */
5374 if ((sec->flags & SEC_ALLOC) == 0)
5375 return TRUE;
5376
5377 BFD_ASSERT (is_ppc64_elf (abfd));
5378
5379 htab = ppc_hash_table (info);
5380 if (htab == NULL)
5381 return FALSE;
5382
5383 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5384 FALSE, FALSE, TRUE);
5385 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5386 FALSE, FALSE, TRUE);
5387 symtab_hdr = &elf_symtab_hdr (abfd);
5388 sym_hashes = elf_sym_hashes (abfd);
5389 sreloc = NULL;
5390 opd_sym_map = NULL;
5391 if (ppc64_elf_section_data (sec) != NULL
5392 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5393 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5394
5395 rel_end = relocs + sec->reloc_count;
5396 for (rel = relocs; rel < rel_end; rel++)
5397 {
5398 unsigned long r_symndx;
5399 struct elf_link_hash_entry *h;
5400 enum elf_ppc64_reloc_type r_type;
5401 int tls_type;
5402 struct _ppc64_elf_section_data *ppc64_sec;
5403 struct plt_entry **ifunc, **plt_list;
5404
5405 r_symndx = ELF64_R_SYM (rel->r_info);
5406 if (r_symndx < symtab_hdr->sh_info)
5407 h = NULL;
5408 else
5409 {
5410 struct ppc_link_hash_entry *eh;
5411
5412 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5413 h = elf_follow_link (h);
5414 eh = (struct ppc_link_hash_entry *) h;
5415
5416 /* PR15323, ref flags aren't set for references in the same
5417 object. */
5418 h->root.non_ir_ref = 1;
5419 if (eh->is_func && eh->oh != NULL)
5420 eh->oh->elf.root.non_ir_ref = 1;
5421
5422 if (h == htab->elf.hgot)
5423 sec->has_toc_reloc = 1;
5424 }
5425
5426 tls_type = 0;
5427 ifunc = NULL;
5428 if (h != NULL)
5429 {
5430 if (h->type == STT_GNU_IFUNC)
5431 {
5432 h->needs_plt = 1;
5433 ifunc = &h->plt.plist;
5434 }
5435 }
5436 else
5437 {
5438 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5439 abfd, r_symndx);
5440 if (isym == NULL)
5441 return FALSE;
5442
5443 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5444 {
5445 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5446 rel->r_addend, PLT_IFUNC);
5447 if (ifunc == NULL)
5448 return FALSE;
5449 }
5450 }
5451
5452 r_type = ELF64_R_TYPE (rel->r_info);
5453 switch (r_type)
5454 {
5455 case R_PPC64_TLSGD:
5456 case R_PPC64_TLSLD:
5457 /* These special tls relocs tie a call to __tls_get_addr with
5458 its parameter symbol. */
5459 break;
5460
5461 case R_PPC64_GOT_TLSLD16:
5462 case R_PPC64_GOT_TLSLD16_LO:
5463 case R_PPC64_GOT_TLSLD16_HI:
5464 case R_PPC64_GOT_TLSLD16_HA:
5465 tls_type = TLS_TLS | TLS_LD;
5466 goto dogottls;
5467
5468 case R_PPC64_GOT_TLSGD16:
5469 case R_PPC64_GOT_TLSGD16_LO:
5470 case R_PPC64_GOT_TLSGD16_HI:
5471 case R_PPC64_GOT_TLSGD16_HA:
5472 tls_type = TLS_TLS | TLS_GD;
5473 goto dogottls;
5474
5475 case R_PPC64_GOT_TPREL16_DS:
5476 case R_PPC64_GOT_TPREL16_LO_DS:
5477 case R_PPC64_GOT_TPREL16_HI:
5478 case R_PPC64_GOT_TPREL16_HA:
5479 if (bfd_link_pic (info))
5480 info->flags |= DF_STATIC_TLS;
5481 tls_type = TLS_TLS | TLS_TPREL;
5482 goto dogottls;
5483
5484 case R_PPC64_GOT_DTPREL16_DS:
5485 case R_PPC64_GOT_DTPREL16_LO_DS:
5486 case R_PPC64_GOT_DTPREL16_HI:
5487 case R_PPC64_GOT_DTPREL16_HA:
5488 tls_type = TLS_TLS | TLS_DTPREL;
5489 dogottls:
5490 sec->has_tls_reloc = 1;
5491 /* Fall through */
5492
5493 case R_PPC64_GOT16:
5494 case R_PPC64_GOT16_DS:
5495 case R_PPC64_GOT16_HA:
5496 case R_PPC64_GOT16_HI:
5497 case R_PPC64_GOT16_LO:
5498 case R_PPC64_GOT16_LO_DS:
5499 /* This symbol requires a global offset table entry. */
5500 sec->has_toc_reloc = 1;
5501 if (r_type == R_PPC64_GOT_TLSLD16
5502 || r_type == R_PPC64_GOT_TLSGD16
5503 || r_type == R_PPC64_GOT_TPREL16_DS
5504 || r_type == R_PPC64_GOT_DTPREL16_DS
5505 || r_type == R_PPC64_GOT16
5506 || r_type == R_PPC64_GOT16_DS)
5507 {
5508 htab->do_multi_toc = 1;
5509 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5510 }
5511
5512 if (ppc64_elf_tdata (abfd)->got == NULL
5513 && !create_got_section (abfd, info))
5514 return FALSE;
5515
5516 if (h != NULL)
5517 {
5518 struct ppc_link_hash_entry *eh;
5519 struct got_entry *ent;
5520
5521 eh = (struct ppc_link_hash_entry *) h;
5522 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5523 if (ent->addend == rel->r_addend
5524 && ent->owner == abfd
5525 && ent->tls_type == tls_type)
5526 break;
5527 if (ent == NULL)
5528 {
5529 bfd_size_type amt = sizeof (*ent);
5530 ent = bfd_alloc (abfd, amt);
5531 if (ent == NULL)
5532 return FALSE;
5533 ent->next = eh->elf.got.glist;
5534 ent->addend = rel->r_addend;
5535 ent->owner = abfd;
5536 ent->tls_type = tls_type;
5537 ent->is_indirect = FALSE;
5538 ent->got.refcount = 0;
5539 eh->elf.got.glist = ent;
5540 }
5541 ent->got.refcount += 1;
5542 eh->tls_mask |= tls_type;
5543 }
5544 else
5545 /* This is a global offset table entry for a local symbol. */
5546 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5547 rel->r_addend, tls_type))
5548 return FALSE;
5549
5550 /* We may also need a plt entry if the symbol turns out to be
5551 an ifunc. */
5552 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5553 {
5554 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5555 return FALSE;
5556 }
5557 break;
5558
5559 case R_PPC64_PLT16_HA:
5560 case R_PPC64_PLT16_HI:
5561 case R_PPC64_PLT16_LO:
5562 case R_PPC64_PLT32:
5563 case R_PPC64_PLT64:
5564 /* This symbol requires a procedure linkage table entry. */
5565 plt_list = ifunc;
5566 if (h != NULL)
5567 {
5568 h->needs_plt = 1;
5569 if (h->root.root.string[0] == '.'
5570 && h->root.root.string[1] != '\0')
5571 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5572 plt_list = &h->plt.plist;
5573 }
5574 if (plt_list == NULL)
5575 {
5576 /* It does not make sense to have a procedure linkage
5577 table entry for a non-ifunc local symbol. */
5578 info->callbacks->einfo
5579 /* xgettext:c-format */
5580 (_("%H: %s reloc against local symbol\n"),
5581 abfd, sec, rel->r_offset,
5582 ppc64_elf_howto_table[r_type]->name);
5583 bfd_set_error (bfd_error_bad_value);
5584 return FALSE;
5585 }
5586 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5587 return FALSE;
5588 break;
5589
5590 /* The following relocations don't need to propagate the
5591 relocation if linking a shared object since they are
5592 section relative. */
5593 case R_PPC64_SECTOFF:
5594 case R_PPC64_SECTOFF_LO:
5595 case R_PPC64_SECTOFF_HI:
5596 case R_PPC64_SECTOFF_HA:
5597 case R_PPC64_SECTOFF_DS:
5598 case R_PPC64_SECTOFF_LO_DS:
5599 case R_PPC64_DTPREL16:
5600 case R_PPC64_DTPREL16_LO:
5601 case R_PPC64_DTPREL16_HI:
5602 case R_PPC64_DTPREL16_HA:
5603 case R_PPC64_DTPREL16_DS:
5604 case R_PPC64_DTPREL16_LO_DS:
5605 case R_PPC64_DTPREL16_HIGH:
5606 case R_PPC64_DTPREL16_HIGHA:
5607 case R_PPC64_DTPREL16_HIGHER:
5608 case R_PPC64_DTPREL16_HIGHERA:
5609 case R_PPC64_DTPREL16_HIGHEST:
5610 case R_PPC64_DTPREL16_HIGHESTA:
5611 break;
5612
5613 /* Nor do these. */
5614 case R_PPC64_REL16:
5615 case R_PPC64_REL16_LO:
5616 case R_PPC64_REL16_HI:
5617 case R_PPC64_REL16_HA:
5618 case R_PPC64_REL16DX_HA:
5619 break;
5620
5621 /* Not supported as a dynamic relocation. */
5622 case R_PPC64_ADDR64_LOCAL:
5623 if (bfd_link_pic (info))
5624 {
5625 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5626 ppc_howto_init ();
5627 /* xgettext:c-format */
5628 info->callbacks->einfo (_("%H: %s reloc unsupported "
5629 "in shared libraries and PIEs.\n"),
5630 abfd, sec, rel->r_offset,
5631 ppc64_elf_howto_table[r_type]->name);
5632 bfd_set_error (bfd_error_bad_value);
5633 return FALSE;
5634 }
5635 break;
5636
5637 case R_PPC64_TOC16:
5638 case R_PPC64_TOC16_DS:
5639 htab->do_multi_toc = 1;
5640 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5641 /* Fall through. */
5642 case R_PPC64_TOC16_LO:
5643 case R_PPC64_TOC16_HI:
5644 case R_PPC64_TOC16_HA:
5645 case R_PPC64_TOC16_LO_DS:
5646 sec->has_toc_reloc = 1;
5647 break;
5648
5649 /* Marker reloc. */
5650 case R_PPC64_ENTRY:
5651 break;
5652
5653 /* This relocation describes the C++ object vtable hierarchy.
5654 Reconstruct it for later use during GC. */
5655 case R_PPC64_GNU_VTINHERIT:
5656 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5657 return FALSE;
5658 break;
5659
5660 /* This relocation describes which C++ vtable entries are actually
5661 used. Record for later use during GC. */
5662 case R_PPC64_GNU_VTENTRY:
5663 BFD_ASSERT (h != NULL);
5664 if (h != NULL
5665 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5666 return FALSE;
5667 break;
5668
5669 case R_PPC64_REL14:
5670 case R_PPC64_REL14_BRTAKEN:
5671 case R_PPC64_REL14_BRNTAKEN:
5672 {
5673 asection *dest = NULL;
5674
5675 /* Heuristic: If jumping outside our section, chances are
5676 we are going to need a stub. */
5677 if (h != NULL)
5678 {
5679 /* If the sym is weak it may be overridden later, so
5680 don't assume we know where a weak sym lives. */
5681 if (h->root.type == bfd_link_hash_defined)
5682 dest = h->root.u.def.section;
5683 }
5684 else
5685 {
5686 Elf_Internal_Sym *isym;
5687
5688 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5689 abfd, r_symndx);
5690 if (isym == NULL)
5691 return FALSE;
5692
5693 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5694 }
5695
5696 if (dest != sec)
5697 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5698 }
5699 /* Fall through. */
5700
5701 case R_PPC64_REL24:
5702 plt_list = ifunc;
5703 if (h != NULL)
5704 {
5705 h->needs_plt = 1;
5706 if (h->root.root.string[0] == '.'
5707 && h->root.root.string[1] != '\0')
5708 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5709
5710 if (h == tga || h == dottga)
5711 {
5712 sec->has_tls_reloc = 1;
5713 if (rel != relocs
5714 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5715 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5716 /* We have a new-style __tls_get_addr call with
5717 a marker reloc. */
5718 ;
5719 else
5720 /* Mark this section as having an old-style call. */
5721 sec->has_tls_get_addr_call = 1;
5722 }
5723 plt_list = &h->plt.plist;
5724 }
5725
5726 /* We may need a .plt entry if the function this reloc
5727 refers to is in a shared lib. */
5728 if (plt_list
5729 && !update_plt_info (abfd, plt_list, rel->r_addend))
5730 return FALSE;
5731 break;
5732
5733 case R_PPC64_ADDR14:
5734 case R_PPC64_ADDR14_BRNTAKEN:
5735 case R_PPC64_ADDR14_BRTAKEN:
5736 case R_PPC64_ADDR24:
5737 goto dodyn;
5738
5739 case R_PPC64_TPREL64:
5740 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5741 if (bfd_link_pic (info))
5742 info->flags |= DF_STATIC_TLS;
5743 goto dotlstoc;
5744
5745 case R_PPC64_DTPMOD64:
5746 if (rel + 1 < rel_end
5747 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5748 && rel[1].r_offset == rel->r_offset + 8)
5749 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5750 else
5751 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5752 goto dotlstoc;
5753
5754 case R_PPC64_DTPREL64:
5755 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5756 if (rel != relocs
5757 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5758 && rel[-1].r_offset == rel->r_offset - 8)
5759 /* This is the second reloc of a dtpmod, dtprel pair.
5760 Don't mark with TLS_DTPREL. */
5761 goto dodyn;
5762
5763 dotlstoc:
5764 sec->has_tls_reloc = 1;
5765 if (h != NULL)
5766 {
5767 struct ppc_link_hash_entry *eh;
5768 eh = (struct ppc_link_hash_entry *) h;
5769 eh->tls_mask |= tls_type;
5770 }
5771 else
5772 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5773 rel->r_addend, tls_type))
5774 return FALSE;
5775
5776 ppc64_sec = ppc64_elf_section_data (sec);
5777 if (ppc64_sec->sec_type != sec_toc)
5778 {
5779 bfd_size_type amt;
5780
5781 /* One extra to simplify get_tls_mask. */
5782 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5783 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5784 if (ppc64_sec->u.toc.symndx == NULL)
5785 return FALSE;
5786 amt = sec->size * sizeof (bfd_vma) / 8;
5787 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5788 if (ppc64_sec->u.toc.add == NULL)
5789 return FALSE;
5790 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5791 ppc64_sec->sec_type = sec_toc;
5792 }
5793 BFD_ASSERT (rel->r_offset % 8 == 0);
5794 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5795 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5796
5797 /* Mark the second slot of a GD or LD entry.
5798 -1 to indicate GD and -2 to indicate LD. */
5799 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5800 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5801 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5802 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5803 goto dodyn;
5804
5805 case R_PPC64_TPREL16:
5806 case R_PPC64_TPREL16_LO:
5807 case R_PPC64_TPREL16_HI:
5808 case R_PPC64_TPREL16_HA:
5809 case R_PPC64_TPREL16_DS:
5810 case R_PPC64_TPREL16_LO_DS:
5811 case R_PPC64_TPREL16_HIGH:
5812 case R_PPC64_TPREL16_HIGHA:
5813 case R_PPC64_TPREL16_HIGHER:
5814 case R_PPC64_TPREL16_HIGHERA:
5815 case R_PPC64_TPREL16_HIGHEST:
5816 case R_PPC64_TPREL16_HIGHESTA:
5817 if (bfd_link_pic (info))
5818 {
5819 info->flags |= DF_STATIC_TLS;
5820 goto dodyn;
5821 }
5822 break;
5823
5824 case R_PPC64_ADDR64:
5825 if (opd_sym_map != NULL
5826 && rel + 1 < rel_end
5827 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5828 {
5829 if (h != NULL)
5830 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5831 else
5832 {
5833 asection *s;
5834 Elf_Internal_Sym *isym;
5835
5836 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5837 abfd, r_symndx);
5838 if (isym == NULL)
5839 return FALSE;
5840
5841 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5842 if (s != NULL && s != sec)
5843 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5844 }
5845 }
5846 /* Fall through. */
5847
5848 case R_PPC64_ADDR16:
5849 case R_PPC64_ADDR16_DS:
5850 case R_PPC64_ADDR16_HA:
5851 case R_PPC64_ADDR16_HI:
5852 case R_PPC64_ADDR16_HIGH:
5853 case R_PPC64_ADDR16_HIGHA:
5854 case R_PPC64_ADDR16_HIGHER:
5855 case R_PPC64_ADDR16_HIGHERA:
5856 case R_PPC64_ADDR16_HIGHEST:
5857 case R_PPC64_ADDR16_HIGHESTA:
5858 case R_PPC64_ADDR16_LO:
5859 case R_PPC64_ADDR16_LO_DS:
5860 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5861 && rel->r_addend == 0)
5862 {
5863 /* We may need a .plt entry if this reloc refers to a
5864 function in a shared lib. */
5865 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5866 return FALSE;
5867 h->pointer_equality_needed = 1;
5868 }
5869 /* Fall through. */
5870
5871 case R_PPC64_REL30:
5872 case R_PPC64_REL32:
5873 case R_PPC64_REL64:
5874 case R_PPC64_ADDR32:
5875 case R_PPC64_UADDR16:
5876 case R_PPC64_UADDR32:
5877 case R_PPC64_UADDR64:
5878 case R_PPC64_TOC:
5879 if (h != NULL && !bfd_link_pic (info))
5880 /* We may need a copy reloc. */
5881 h->non_got_ref = 1;
5882
5883 /* Don't propagate .opd relocs. */
5884 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5885 break;
5886
5887 /* If we are creating a shared library, and this is a reloc
5888 against a global symbol, or a non PC relative reloc
5889 against a local symbol, then we need to copy the reloc
5890 into the shared library. However, if we are linking with
5891 -Bsymbolic, we do not need to copy a reloc against a
5892 global symbol which is defined in an object we are
5893 including in the link (i.e., DEF_REGULAR is set). At
5894 this point we have not seen all the input files, so it is
5895 possible that DEF_REGULAR is not set now but will be set
5896 later (it is never cleared). In case of a weak definition,
5897 DEF_REGULAR may be cleared later by a strong definition in
5898 a shared library. We account for that possibility below by
5899 storing information in the dyn_relocs field of the hash
5900 table entry. A similar situation occurs when creating
5901 shared libraries and symbol visibility changes render the
5902 symbol local.
5903
5904 If on the other hand, we are creating an executable, we
5905 may need to keep relocations for symbols satisfied by a
5906 dynamic library if we manage to avoid copy relocs for the
5907 symbol. */
5908 dodyn:
5909 if ((bfd_link_pic (info)
5910 && (must_be_dyn_reloc (info, r_type)
5911 || (h != NULL
5912 && (!SYMBOLIC_BIND (info, h)
5913 || h->root.type == bfd_link_hash_defweak
5914 || !h->def_regular))))
5915 || (ELIMINATE_COPY_RELOCS
5916 && !bfd_link_pic (info)
5917 && h != NULL
5918 && (h->root.type == bfd_link_hash_defweak
5919 || !h->def_regular))
5920 || (!bfd_link_pic (info)
5921 && ifunc != NULL))
5922 {
5923 /* We must copy these reloc types into the output file.
5924 Create a reloc section in dynobj and make room for
5925 this reloc. */
5926 if (sreloc == NULL)
5927 {
5928 sreloc = _bfd_elf_make_dynamic_reloc_section
5929 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5930
5931 if (sreloc == NULL)
5932 return FALSE;
5933 }
5934
5935 /* If this is a global symbol, we count the number of
5936 relocations we need for this symbol. */
5937 if (h != NULL)
5938 {
5939 struct elf_dyn_relocs *p;
5940 struct elf_dyn_relocs **head;
5941
5942 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5943 p = *head;
5944 if (p == NULL || p->sec != sec)
5945 {
5946 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5947 if (p == NULL)
5948 return FALSE;
5949 p->next = *head;
5950 *head = p;
5951 p->sec = sec;
5952 p->count = 0;
5953 p->pc_count = 0;
5954 }
5955 p->count += 1;
5956 if (!must_be_dyn_reloc (info, r_type))
5957 p->pc_count += 1;
5958 }
5959 else
5960 {
5961 /* Track dynamic relocs needed for local syms too.
5962 We really need local syms available to do this
5963 easily. Oh well. */
5964 struct ppc_dyn_relocs *p;
5965 struct ppc_dyn_relocs **head;
5966 bfd_boolean is_ifunc;
5967 asection *s;
5968 void *vpp;
5969 Elf_Internal_Sym *isym;
5970
5971 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5972 abfd, r_symndx);
5973 if (isym == NULL)
5974 return FALSE;
5975
5976 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5977 if (s == NULL)
5978 s = sec;
5979
5980 vpp = &elf_section_data (s)->local_dynrel;
5981 head = (struct ppc_dyn_relocs **) vpp;
5982 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5983 p = *head;
5984 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5985 p = p->next;
5986 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5987 {
5988 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5989 if (p == NULL)
5990 return FALSE;
5991 p->next = *head;
5992 *head = p;
5993 p->sec = sec;
5994 p->ifunc = is_ifunc;
5995 p->count = 0;
5996 }
5997 p->count += 1;
5998 }
5999 }
6000 break;
6001
6002 default:
6003 break;
6004 }
6005 }
6006
6007 return TRUE;
6008 }
6009
6010 /* Merge backend specific data from an object file to the output
6011 object file when linking. */
6012
6013 static bfd_boolean
6014 ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6015 {
6016 bfd *obfd = info->output_bfd;
6017 unsigned long iflags, oflags;
6018
6019 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
6020 return TRUE;
6021
6022 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6023 return TRUE;
6024
6025 if (!_bfd_generic_verify_endian_match (ibfd, info))
6026 return FALSE;
6027
6028 iflags = elf_elfheader (ibfd)->e_flags;
6029 oflags = elf_elfheader (obfd)->e_flags;
6030
6031 if (iflags & ~EF_PPC64_ABI)
6032 {
6033 _bfd_error_handler
6034 /* xgettext:c-format */
6035 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6036 bfd_set_error (bfd_error_bad_value);
6037 return FALSE;
6038 }
6039 else if (iflags != oflags && iflags != 0)
6040 {
6041 _bfd_error_handler
6042 /* xgettext:c-format */
6043 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6044 ibfd, iflags, oflags);
6045 bfd_set_error (bfd_error_bad_value);
6046 return FALSE;
6047 }
6048
6049 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6050
6051 /* Merge Tag_compatibility attributes and any common GNU ones. */
6052 _bfd_elf_merge_object_attributes (ibfd, info);
6053
6054 return TRUE;
6055 }
6056
6057 static bfd_boolean
6058 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6059 {
6060 /* Print normal ELF private data. */
6061 _bfd_elf_print_private_bfd_data (abfd, ptr);
6062
6063 if (elf_elfheader (abfd)->e_flags != 0)
6064 {
6065 FILE *file = ptr;
6066
6067 fprintf (file, _("private flags = 0x%lx:"),
6068 elf_elfheader (abfd)->e_flags);
6069
6070 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6071 fprintf (file, _(" [abiv%ld]"),
6072 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6073 fputc ('\n', file);
6074 }
6075
6076 return TRUE;
6077 }
6078
6079 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6080 of the code entry point, and its section, which must be in the same
6081 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6082
6083 static bfd_vma
6084 opd_entry_value (asection *opd_sec,
6085 bfd_vma offset,
6086 asection **code_sec,
6087 bfd_vma *code_off,
6088 bfd_boolean in_code_sec)
6089 {
6090 bfd *opd_bfd = opd_sec->owner;
6091 Elf_Internal_Rela *relocs;
6092 Elf_Internal_Rela *lo, *hi, *look;
6093 bfd_vma val;
6094
6095 /* No relocs implies we are linking a --just-symbols object, or looking
6096 at a final linked executable with addr2line or somesuch. */
6097 if (opd_sec->reloc_count == 0)
6098 {
6099 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6100
6101 if (contents == NULL)
6102 {
6103 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6104 return (bfd_vma) -1;
6105 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6106 }
6107
6108 /* PR 17512: file: 64b9dfbb. */
6109 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6110 return (bfd_vma) -1;
6111
6112 val = bfd_get_64 (opd_bfd, contents + offset);
6113 if (code_sec != NULL)
6114 {
6115 asection *sec, *likely = NULL;
6116
6117 if (in_code_sec)
6118 {
6119 sec = *code_sec;
6120 if (sec->vma <= val
6121 && val < sec->vma + sec->size)
6122 likely = sec;
6123 else
6124 val = -1;
6125 }
6126 else
6127 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6128 if (sec->vma <= val
6129 && (sec->flags & SEC_LOAD) != 0
6130 && (sec->flags & SEC_ALLOC) != 0)
6131 likely = sec;
6132 if (likely != NULL)
6133 {
6134 *code_sec = likely;
6135 if (code_off != NULL)
6136 *code_off = val - likely->vma;
6137 }
6138 }
6139 return val;
6140 }
6141
6142 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6143
6144 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6145 if (relocs == NULL)
6146 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6147 /* PR 17512: file: df8e1fd6. */
6148 if (relocs == NULL)
6149 return (bfd_vma) -1;
6150
6151 /* Go find the opd reloc at the sym address. */
6152 lo = relocs;
6153 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6154 val = (bfd_vma) -1;
6155 while (lo < hi)
6156 {
6157 look = lo + (hi - lo) / 2;
6158 if (look->r_offset < offset)
6159 lo = look + 1;
6160 else if (look->r_offset > offset)
6161 hi = look;
6162 else
6163 {
6164 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6165
6166 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6167 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6168 {
6169 unsigned long symndx = ELF64_R_SYM (look->r_info);
6170 asection *sec = NULL;
6171
6172 if (symndx >= symtab_hdr->sh_info
6173 && elf_sym_hashes (opd_bfd) != NULL)
6174 {
6175 struct elf_link_hash_entry **sym_hashes;
6176 struct elf_link_hash_entry *rh;
6177
6178 sym_hashes = elf_sym_hashes (opd_bfd);
6179 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6180 if (rh != NULL)
6181 {
6182 rh = elf_follow_link (rh);
6183 if (rh->root.type != bfd_link_hash_defined
6184 && rh->root.type != bfd_link_hash_defweak)
6185 break;
6186 if (rh->root.u.def.section->owner == opd_bfd)
6187 {
6188 val = rh->root.u.def.value;
6189 sec = rh->root.u.def.section;
6190 }
6191 }
6192 }
6193
6194 if (sec == NULL)
6195 {
6196 Elf_Internal_Sym *sym;
6197
6198 if (symndx < symtab_hdr->sh_info)
6199 {
6200 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6201 if (sym == NULL)
6202 {
6203 size_t symcnt = symtab_hdr->sh_info;
6204 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6205 symcnt, 0,
6206 NULL, NULL, NULL);
6207 if (sym == NULL)
6208 break;
6209 symtab_hdr->contents = (bfd_byte *) sym;
6210 }
6211 sym += symndx;
6212 }
6213 else
6214 {
6215 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6216 1, symndx,
6217 NULL, NULL, NULL);
6218 if (sym == NULL)
6219 break;
6220 }
6221 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6222 if (sec == NULL)
6223 break;
6224 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6225 val = sym->st_value;
6226 }
6227
6228 val += look->r_addend;
6229 if (code_off != NULL)
6230 *code_off = val;
6231 if (code_sec != NULL)
6232 {
6233 if (in_code_sec && *code_sec != sec)
6234 return -1;
6235 else
6236 *code_sec = sec;
6237 }
6238 if (sec->output_section != NULL)
6239 val += sec->output_section->vma + sec->output_offset;
6240 }
6241 break;
6242 }
6243 }
6244
6245 return val;
6246 }
6247
6248 /* If the ELF symbol SYM might be a function in SEC, return the
6249 function size and set *CODE_OFF to the function's entry point,
6250 otherwise return zero. */
6251
6252 static bfd_size_type
6253 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6254 bfd_vma *code_off)
6255 {
6256 bfd_size_type size;
6257
6258 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6259 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6260 return 0;
6261
6262 size = 0;
6263 if (!(sym->flags & BSF_SYNTHETIC))
6264 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6265
6266 if (strcmp (sym->section->name, ".opd") == 0)
6267 {
6268 struct _opd_sec_data *opd = get_opd_info (sym->section);
6269 bfd_vma symval = sym->value;
6270
6271 if (opd != NULL
6272 && opd->adjust != NULL
6273 && elf_section_data (sym->section)->relocs != NULL)
6274 {
6275 /* opd_entry_value will use cached relocs that have been
6276 adjusted, but with raw symbols. That means both local
6277 and global symbols need adjusting. */
6278 long adjust = opd->adjust[OPD_NDX (symval)];
6279 if (adjust == -1)
6280 return 0;
6281 symval += adjust;
6282 }
6283
6284 if (opd_entry_value (sym->section, symval,
6285 &sec, code_off, TRUE) == (bfd_vma) -1)
6286 return 0;
6287 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6288 symbol. This size has nothing to do with the code size of the
6289 function, which is what we're supposed to return, but the
6290 code size isn't available without looking up the dot-sym.
6291 However, doing that would be a waste of time particularly
6292 since elf_find_function will look at the dot-sym anyway.
6293 Now, elf_find_function will keep the largest size of any
6294 function sym found at the code address of interest, so return
6295 1 here to avoid it incorrectly caching a larger function size
6296 for a small function. This does mean we return the wrong
6297 size for a new-ABI function of size 24, but all that does is
6298 disable caching for such functions. */
6299 if (size == 24)
6300 size = 1;
6301 }
6302 else
6303 {
6304 if (sym->section != sec)
6305 return 0;
6306 *code_off = sym->value;
6307 }
6308 if (size == 0)
6309 size = 1;
6310 return size;
6311 }
6312
6313 /* Return true if symbol is defined in a regular object file. */
6314
6315 static bfd_boolean
6316 is_static_defined (struct elf_link_hash_entry *h)
6317 {
6318 return ((h->root.type == bfd_link_hash_defined
6319 || h->root.type == bfd_link_hash_defweak)
6320 && h->root.u.def.section != NULL
6321 && h->root.u.def.section->output_section != NULL);
6322 }
6323
6324 /* If FDH is a function descriptor symbol, return the associated code
6325 entry symbol if it is defined. Return NULL otherwise. */
6326
6327 static struct ppc_link_hash_entry *
6328 defined_code_entry (struct ppc_link_hash_entry *fdh)
6329 {
6330 if (fdh->is_func_descriptor)
6331 {
6332 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6333 if (fh->elf.root.type == bfd_link_hash_defined
6334 || fh->elf.root.type == bfd_link_hash_defweak)
6335 return fh;
6336 }
6337 return NULL;
6338 }
6339
6340 /* If FH is a function code entry symbol, return the associated
6341 function descriptor symbol if it is defined. Return NULL otherwise. */
6342
6343 static struct ppc_link_hash_entry *
6344 defined_func_desc (struct ppc_link_hash_entry *fh)
6345 {
6346 if (fh->oh != NULL
6347 && fh->oh->is_func_descriptor)
6348 {
6349 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6350 if (fdh->elf.root.type == bfd_link_hash_defined
6351 || fdh->elf.root.type == bfd_link_hash_defweak)
6352 return fdh;
6353 }
6354 return NULL;
6355 }
6356
6357 static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6358
6359 /* Garbage collect sections, after first dealing with dot-symbols. */
6360
6361 static bfd_boolean
6362 ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6363 {
6364 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6365
6366 if (htab != NULL && htab->need_func_desc_adj)
6367 {
6368 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6369 htab->need_func_desc_adj = 0;
6370 }
6371 return bfd_elf_gc_sections (abfd, info);
6372 }
6373
6374 /* Mark all our entry sym sections, both opd and code section. */
6375
6376 static void
6377 ppc64_elf_gc_keep (struct bfd_link_info *info)
6378 {
6379 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6380 struct bfd_sym_chain *sym;
6381
6382 if (htab == NULL)
6383 return;
6384
6385 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6386 {
6387 struct ppc_link_hash_entry *eh, *fh;
6388 asection *sec;
6389
6390 eh = (struct ppc_link_hash_entry *)
6391 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6392 if (eh == NULL)
6393 continue;
6394 if (eh->elf.root.type != bfd_link_hash_defined
6395 && eh->elf.root.type != bfd_link_hash_defweak)
6396 continue;
6397
6398 fh = defined_code_entry (eh);
6399 if (fh != NULL)
6400 {
6401 sec = fh->elf.root.u.def.section;
6402 sec->flags |= SEC_KEEP;
6403 }
6404 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6405 && opd_entry_value (eh->elf.root.u.def.section,
6406 eh->elf.root.u.def.value,
6407 &sec, NULL, FALSE) != (bfd_vma) -1)
6408 sec->flags |= SEC_KEEP;
6409
6410 sec = eh->elf.root.u.def.section;
6411 sec->flags |= SEC_KEEP;
6412 }
6413 }
6414
6415 /* Mark sections containing dynamically referenced symbols. When
6416 building shared libraries, we must assume that any visible symbol is
6417 referenced. */
6418
6419 static bfd_boolean
6420 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6421 {
6422 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6423 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6424 struct ppc_link_hash_entry *fdh;
6425 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6426
6427 /* Dynamic linking info is on the func descriptor sym. */
6428 fdh = defined_func_desc (eh);
6429 if (fdh != NULL)
6430 eh = fdh;
6431
6432 if ((eh->elf.root.type == bfd_link_hash_defined
6433 || eh->elf.root.type == bfd_link_hash_defweak)
6434 && (eh->elf.ref_dynamic
6435 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6436 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6437 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6438 && (!bfd_link_executable (info)
6439 || info->gc_keep_exported
6440 || info->export_dynamic
6441 || (eh->elf.dynamic
6442 && d != NULL
6443 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6444 && (eh->elf.versioned >= versioned
6445 || !bfd_hide_sym_by_version (info->version_info,
6446 eh->elf.root.root.string)))))
6447 {
6448 asection *code_sec;
6449 struct ppc_link_hash_entry *fh;
6450
6451 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6452
6453 /* Function descriptor syms cause the associated
6454 function code sym section to be marked. */
6455 fh = defined_code_entry (eh);
6456 if (fh != NULL)
6457 {
6458 code_sec = fh->elf.root.u.def.section;
6459 code_sec->flags |= SEC_KEEP;
6460 }
6461 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6462 && opd_entry_value (eh->elf.root.u.def.section,
6463 eh->elf.root.u.def.value,
6464 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6465 code_sec->flags |= SEC_KEEP;
6466 }
6467
6468 return TRUE;
6469 }
6470
6471 /* Return the section that should be marked against GC for a given
6472 relocation. */
6473
6474 static asection *
6475 ppc64_elf_gc_mark_hook (asection *sec,
6476 struct bfd_link_info *info,
6477 Elf_Internal_Rela *rel,
6478 struct elf_link_hash_entry *h,
6479 Elf_Internal_Sym *sym)
6480 {
6481 asection *rsec;
6482
6483 /* Syms return NULL if we're marking .opd, so we avoid marking all
6484 function sections, as all functions are referenced in .opd. */
6485 rsec = NULL;
6486 if (get_opd_info (sec) != NULL)
6487 return rsec;
6488
6489 if (h != NULL)
6490 {
6491 enum elf_ppc64_reloc_type r_type;
6492 struct ppc_link_hash_entry *eh, *fh, *fdh;
6493
6494 r_type = ELF64_R_TYPE (rel->r_info);
6495 switch (r_type)
6496 {
6497 case R_PPC64_GNU_VTINHERIT:
6498 case R_PPC64_GNU_VTENTRY:
6499 break;
6500
6501 default:
6502 switch (h->root.type)
6503 {
6504 case bfd_link_hash_defined:
6505 case bfd_link_hash_defweak:
6506 eh = (struct ppc_link_hash_entry *) h;
6507 fdh = defined_func_desc (eh);
6508 if (fdh != NULL)
6509 {
6510 /* -mcall-aixdesc code references the dot-symbol on
6511 a call reloc. Mark the function descriptor too
6512 against garbage collection. */
6513 fdh->elf.mark = 1;
6514 if (fdh->elf.u.weakdef != NULL)
6515 fdh->elf.u.weakdef->mark = 1;
6516 eh = fdh;
6517 }
6518
6519 /* Function descriptor syms cause the associated
6520 function code sym section to be marked. */
6521 fh = defined_code_entry (eh);
6522 if (fh != NULL)
6523 {
6524 /* They also mark their opd section. */
6525 eh->elf.root.u.def.section->gc_mark = 1;
6526
6527 rsec = fh->elf.root.u.def.section;
6528 }
6529 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6530 && opd_entry_value (eh->elf.root.u.def.section,
6531 eh->elf.root.u.def.value,
6532 &rsec, NULL, FALSE) != (bfd_vma) -1)
6533 eh->elf.root.u.def.section->gc_mark = 1;
6534 else
6535 rsec = h->root.u.def.section;
6536 break;
6537
6538 case bfd_link_hash_common:
6539 rsec = h->root.u.c.p->section;
6540 break;
6541
6542 default:
6543 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6544 }
6545 }
6546 }
6547 else
6548 {
6549 struct _opd_sec_data *opd;
6550
6551 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6552 opd = get_opd_info (rsec);
6553 if (opd != NULL && opd->func_sec != NULL)
6554 {
6555 rsec->gc_mark = 1;
6556
6557 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6558 }
6559 }
6560
6561 return rsec;
6562 }
6563
6564 /* Update the .got, .plt. and dynamic reloc reference counts for the
6565 section being removed. */
6566
6567 static bfd_boolean
6568 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6569 asection *sec, const Elf_Internal_Rela *relocs)
6570 {
6571 struct ppc_link_hash_table *htab;
6572 Elf_Internal_Shdr *symtab_hdr;
6573 struct elf_link_hash_entry **sym_hashes;
6574 struct got_entry **local_got_ents;
6575 const Elf_Internal_Rela *rel, *relend;
6576
6577 if (bfd_link_relocatable (info))
6578 return TRUE;
6579
6580 if ((sec->flags & SEC_ALLOC) == 0)
6581 return TRUE;
6582
6583 elf_section_data (sec)->local_dynrel = NULL;
6584
6585 htab = ppc_hash_table (info);
6586 if (htab == NULL)
6587 return FALSE;
6588
6589 symtab_hdr = &elf_symtab_hdr (abfd);
6590 sym_hashes = elf_sym_hashes (abfd);
6591 local_got_ents = elf_local_got_ents (abfd);
6592
6593 relend = relocs + sec->reloc_count;
6594 for (rel = relocs; rel < relend; rel++)
6595 {
6596 unsigned long r_symndx;
6597 enum elf_ppc64_reloc_type r_type;
6598 struct elf_link_hash_entry *h = NULL;
6599 struct plt_entry **plt_list = NULL;
6600 unsigned char tls_type = 0;
6601
6602 r_symndx = ELF64_R_SYM (rel->r_info);
6603 r_type = ELF64_R_TYPE (rel->r_info);
6604 if (r_symndx >= symtab_hdr->sh_info)
6605 {
6606 struct ppc_link_hash_entry *eh;
6607 struct elf_dyn_relocs **pp;
6608 struct elf_dyn_relocs *p;
6609
6610 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6611 h = elf_follow_link (h);
6612 eh = (struct ppc_link_hash_entry *) h;
6613
6614 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6615 if (p->sec == sec)
6616 {
6617 /* Everything must go for SEC. */
6618 *pp = p->next;
6619 break;
6620 }
6621 }
6622
6623 switch (r_type)
6624 {
6625 case R_PPC64_GOT_TLSLD16:
6626 case R_PPC64_GOT_TLSLD16_LO:
6627 case R_PPC64_GOT_TLSLD16_HI:
6628 case R_PPC64_GOT_TLSLD16_HA:
6629 tls_type = TLS_TLS | TLS_LD;
6630 goto dogot;
6631
6632 case R_PPC64_GOT_TLSGD16:
6633 case R_PPC64_GOT_TLSGD16_LO:
6634 case R_PPC64_GOT_TLSGD16_HI:
6635 case R_PPC64_GOT_TLSGD16_HA:
6636 tls_type = TLS_TLS | TLS_GD;
6637 goto dogot;
6638
6639 case R_PPC64_GOT_TPREL16_DS:
6640 case R_PPC64_GOT_TPREL16_LO_DS:
6641 case R_PPC64_GOT_TPREL16_HI:
6642 case R_PPC64_GOT_TPREL16_HA:
6643 tls_type = TLS_TLS | TLS_TPREL;
6644 goto dogot;
6645
6646 case R_PPC64_GOT_DTPREL16_DS:
6647 case R_PPC64_GOT_DTPREL16_LO_DS:
6648 case R_PPC64_GOT_DTPREL16_HI:
6649 case R_PPC64_GOT_DTPREL16_HA:
6650 tls_type = TLS_TLS | TLS_DTPREL;
6651 goto dogot;
6652
6653 case R_PPC64_GOT16:
6654 case R_PPC64_GOT16_DS:
6655 case R_PPC64_GOT16_HA:
6656 case R_PPC64_GOT16_HI:
6657 case R_PPC64_GOT16_LO:
6658 case R_PPC64_GOT16_LO_DS:
6659 dogot:
6660 {
6661 struct got_entry *ent;
6662
6663 if (h != NULL)
6664 ent = h->got.glist;
6665 else
6666 ent = local_got_ents[r_symndx];
6667
6668 for (; ent != NULL; ent = ent->next)
6669 if (ent->addend == rel->r_addend
6670 && ent->owner == abfd
6671 && ent->tls_type == tls_type)
6672 break;
6673 if (ent == NULL)
6674 abort ();
6675 if (ent->got.refcount > 0)
6676 ent->got.refcount -= 1;
6677 }
6678 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
6679 plt_list = &h->plt.plist;
6680 break;
6681
6682 case R_PPC64_PLT16_HA:
6683 case R_PPC64_PLT16_HI:
6684 case R_PPC64_PLT16_LO:
6685 case R_PPC64_PLT32:
6686 case R_PPC64_PLT64:
6687 case R_PPC64_REL14:
6688 case R_PPC64_REL14_BRNTAKEN:
6689 case R_PPC64_REL14_BRTAKEN:
6690 case R_PPC64_REL24:
6691 if (h != NULL)
6692 plt_list = &h->plt.plist;
6693 else if (local_got_ents != NULL)
6694 {
6695 struct plt_entry **local_plt = (struct plt_entry **)
6696 (local_got_ents + symtab_hdr->sh_info);
6697 unsigned char *local_got_tls_masks = (unsigned char *)
6698 (local_plt + symtab_hdr->sh_info);
6699 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6700 plt_list = local_plt + r_symndx;
6701 }
6702 break;
6703
6704 case R_PPC64_ADDR64:
6705 case R_PPC64_ADDR16:
6706 case R_PPC64_ADDR16_DS:
6707 case R_PPC64_ADDR16_HA:
6708 case R_PPC64_ADDR16_HI:
6709 case R_PPC64_ADDR16_HIGH:
6710 case R_PPC64_ADDR16_HIGHA:
6711 case R_PPC64_ADDR16_HIGHER:
6712 case R_PPC64_ADDR16_HIGHERA:
6713 case R_PPC64_ADDR16_HIGHEST:
6714 case R_PPC64_ADDR16_HIGHESTA:
6715 case R_PPC64_ADDR16_LO:
6716 case R_PPC64_ADDR16_LO_DS:
6717 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
6718 && rel->r_addend == 0)
6719 plt_list = &h->plt.plist;
6720 break;
6721
6722 default:
6723 break;
6724 }
6725 if (plt_list != NULL)
6726 {
6727 struct plt_entry *ent;
6728
6729 for (ent = *plt_list; ent != NULL; ent = ent->next)
6730 if (ent->addend == rel->r_addend)
6731 break;
6732 if (ent != NULL && ent->plt.refcount > 0)
6733 ent->plt.refcount -= 1;
6734 }
6735 }
6736 return TRUE;
6737 }
6738
6739 /* The maximum size of .sfpr. */
6740 #define SFPR_MAX (218*4)
6741
6742 struct sfpr_def_parms
6743 {
6744 const char name[12];
6745 unsigned char lo, hi;
6746 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6747 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6748 };
6749
6750 /* Auto-generate _save*, _rest* functions in .sfpr.
6751 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6752 instead. */
6753
6754 static bfd_boolean
6755 sfpr_define (struct bfd_link_info *info,
6756 const struct sfpr_def_parms *parm,
6757 asection *stub_sec)
6758 {
6759 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6760 unsigned int i;
6761 size_t len = strlen (parm->name);
6762 bfd_boolean writing = FALSE;
6763 char sym[16];
6764
6765 if (htab == NULL)
6766 return FALSE;
6767
6768 memcpy (sym, parm->name, len);
6769 sym[len + 2] = 0;
6770
6771 for (i = parm->lo; i <= parm->hi; i++)
6772 {
6773 struct ppc_link_hash_entry *h;
6774
6775 sym[len + 0] = i / 10 + '0';
6776 sym[len + 1] = i % 10 + '0';
6777 h = (struct ppc_link_hash_entry *)
6778 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6779 if (stub_sec != NULL)
6780 {
6781 if (h != NULL
6782 && h->elf.root.type == bfd_link_hash_defined
6783 && h->elf.root.u.def.section == htab->sfpr)
6784 {
6785 struct elf_link_hash_entry *s;
6786 char buf[32];
6787 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6788 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6789 if (s == NULL)
6790 return FALSE;
6791 if (s->root.type == bfd_link_hash_new
6792 || (s->root.type = bfd_link_hash_defined
6793 && s->root.u.def.section == stub_sec))
6794 {
6795 s->root.type = bfd_link_hash_defined;
6796 s->root.u.def.section = stub_sec;
6797 s->root.u.def.value = (stub_sec->size
6798 + h->elf.root.u.def.value);
6799 s->ref_regular = 1;
6800 s->def_regular = 1;
6801 s->ref_regular_nonweak = 1;
6802 s->forced_local = 1;
6803 s->non_elf = 0;
6804 s->root.linker_def = 1;
6805 }
6806 }
6807 continue;
6808 }
6809 if (h != NULL)
6810 {
6811 h->save_res = 1;
6812 if (!h->elf.def_regular)
6813 {
6814 h->elf.root.type = bfd_link_hash_defined;
6815 h->elf.root.u.def.section = htab->sfpr;
6816 h->elf.root.u.def.value = htab->sfpr->size;
6817 h->elf.type = STT_FUNC;
6818 h->elf.def_regular = 1;
6819 h->elf.non_elf = 0;
6820 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6821 writing = TRUE;
6822 if (htab->sfpr->contents == NULL)
6823 {
6824 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6825 if (htab->sfpr->contents == NULL)
6826 return FALSE;
6827 }
6828 }
6829 }
6830 if (writing)
6831 {
6832 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6833 if (i != parm->hi)
6834 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6835 else
6836 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6837 htab->sfpr->size = p - htab->sfpr->contents;
6838 }
6839 }
6840
6841 return TRUE;
6842 }
6843
6844 static bfd_byte *
6845 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6846 {
6847 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6848 return p + 4;
6849 }
6850
6851 static bfd_byte *
6852 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6853 {
6854 p = savegpr0 (abfd, p, r);
6855 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6856 p = p + 4;
6857 bfd_put_32 (abfd, BLR, p);
6858 return p + 4;
6859 }
6860
6861 static bfd_byte *
6862 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6863 {
6864 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6865 return p + 4;
6866 }
6867
6868 static bfd_byte *
6869 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6870 {
6871 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6872 p = p + 4;
6873 p = restgpr0 (abfd, p, r);
6874 bfd_put_32 (abfd, MTLR_R0, p);
6875 p = p + 4;
6876 if (r == 29)
6877 {
6878 p = restgpr0 (abfd, p, 30);
6879 p = restgpr0 (abfd, p, 31);
6880 }
6881 bfd_put_32 (abfd, BLR, p);
6882 return p + 4;
6883 }
6884
6885 static bfd_byte *
6886 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6887 {
6888 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6889 return p + 4;
6890 }
6891
6892 static bfd_byte *
6893 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6894 {
6895 p = savegpr1 (abfd, p, r);
6896 bfd_put_32 (abfd, BLR, p);
6897 return p + 4;
6898 }
6899
6900 static bfd_byte *
6901 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6902 {
6903 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6904 return p + 4;
6905 }
6906
6907 static bfd_byte *
6908 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6909 {
6910 p = restgpr1 (abfd, p, r);
6911 bfd_put_32 (abfd, BLR, p);
6912 return p + 4;
6913 }
6914
6915 static bfd_byte *
6916 savefpr (bfd *abfd, bfd_byte *p, int r)
6917 {
6918 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6919 return p + 4;
6920 }
6921
6922 static bfd_byte *
6923 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6924 {
6925 p = savefpr (abfd, p, r);
6926 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6927 p = p + 4;
6928 bfd_put_32 (abfd, BLR, p);
6929 return p + 4;
6930 }
6931
6932 static bfd_byte *
6933 restfpr (bfd *abfd, bfd_byte *p, int r)
6934 {
6935 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6936 return p + 4;
6937 }
6938
6939 static bfd_byte *
6940 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6941 {
6942 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6943 p = p + 4;
6944 p = restfpr (abfd, p, r);
6945 bfd_put_32 (abfd, MTLR_R0, p);
6946 p = p + 4;
6947 if (r == 29)
6948 {
6949 p = restfpr (abfd, p, 30);
6950 p = restfpr (abfd, p, 31);
6951 }
6952 bfd_put_32 (abfd, BLR, p);
6953 return p + 4;
6954 }
6955
6956 static bfd_byte *
6957 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6958 {
6959 p = savefpr (abfd, p, r);
6960 bfd_put_32 (abfd, BLR, p);
6961 return p + 4;
6962 }
6963
6964 static bfd_byte *
6965 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6966 {
6967 p = restfpr (abfd, p, r);
6968 bfd_put_32 (abfd, BLR, p);
6969 return p + 4;
6970 }
6971
6972 static bfd_byte *
6973 savevr (bfd *abfd, bfd_byte *p, int r)
6974 {
6975 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6976 p = p + 4;
6977 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6978 return p + 4;
6979 }
6980
6981 static bfd_byte *
6982 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6983 {
6984 p = savevr (abfd, p, r);
6985 bfd_put_32 (abfd, BLR, p);
6986 return p + 4;
6987 }
6988
6989 static bfd_byte *
6990 restvr (bfd *abfd, bfd_byte *p, int r)
6991 {
6992 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6993 p = p + 4;
6994 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6995 return p + 4;
6996 }
6997
6998 static bfd_byte *
6999 restvr_tail (bfd *abfd, bfd_byte *p, int r)
7000 {
7001 p = restvr (abfd, p, r);
7002 bfd_put_32 (abfd, BLR, p);
7003 return p + 4;
7004 }
7005
7006 /* Called via elf_link_hash_traverse to transfer dynamic linking
7007 information on function code symbol entries to their corresponding
7008 function descriptor symbol entries. */
7009
7010 static bfd_boolean
7011 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
7012 {
7013 struct bfd_link_info *info;
7014 struct ppc_link_hash_table *htab;
7015 struct ppc_link_hash_entry *fh;
7016 struct ppc_link_hash_entry *fdh;
7017 bfd_boolean force_local;
7018
7019 fh = (struct ppc_link_hash_entry *) h;
7020 if (fh->elf.root.type == bfd_link_hash_indirect)
7021 return TRUE;
7022
7023 if (!fh->is_func)
7024 return TRUE;
7025
7026 if (fh->elf.root.root.string[0] != '.'
7027 || fh->elf.root.root.string[1] == '\0')
7028 return TRUE;
7029
7030 info = inf;
7031 htab = ppc_hash_table (info);
7032 if (htab == NULL)
7033 return FALSE;
7034
7035 /* Find the corresponding function descriptor symbol. */
7036 fdh = lookup_fdh (fh, htab);
7037
7038 /* Resolve undefined references to dot-symbols as the value
7039 in the function descriptor, if we have one in a regular object.
7040 This is to satisfy cases like ".quad .foo". Calls to functions
7041 in dynamic objects are handled elsewhere. */
7042 if ((fh->elf.root.type == bfd_link_hash_undefined
7043 || fh->elf.root.type == bfd_link_hash_undefweak)
7044 && (fdh->elf.root.type == bfd_link_hash_defined
7045 || fdh->elf.root.type == bfd_link_hash_defweak)
7046 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7047 && opd_entry_value (fdh->elf.root.u.def.section,
7048 fdh->elf.root.u.def.value,
7049 &fh->elf.root.u.def.section,
7050 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7051 {
7052 fh->elf.root.type = fdh->elf.root.type;
7053 fh->elf.forced_local = 1;
7054 fh->elf.def_regular = fdh->elf.def_regular;
7055 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7056 }
7057
7058 if (!fh->elf.dynamic)
7059 {
7060 struct plt_entry *ent;
7061
7062 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7063 if (ent->plt.refcount > 0)
7064 break;
7065 if (ent == NULL)
7066 return TRUE;
7067 }
7068
7069 /* Create a descriptor as undefined if necessary. */
7070 if (fdh == NULL
7071 && !bfd_link_executable (info)
7072 && (fh->elf.root.type == bfd_link_hash_undefined
7073 || fh->elf.root.type == bfd_link_hash_undefweak))
7074 {
7075 fdh = make_fdh (info, fh);
7076 if (fdh == NULL)
7077 return FALSE;
7078 }
7079
7080 /* We can't support overriding of symbols on a fake descriptor. */
7081 if (fdh != NULL
7082 && fdh->fake
7083 && (fh->elf.root.type == bfd_link_hash_defined
7084 || fh->elf.root.type == bfd_link_hash_defweak))
7085 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7086
7087 /* Transfer dynamic linking information to the function descriptor. */
7088 if (fdh != NULL)
7089 {
7090 fdh->elf.ref_regular |= fh->elf.ref_regular;
7091 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7092 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7093 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7094 fdh->elf.dynamic |= fh->elf.dynamic;
7095 fdh->elf.needs_plt |= (fh->elf.needs_plt
7096 || fh->elf.type == STT_FUNC
7097 || fh->elf.type == STT_GNU_IFUNC);
7098 move_plt_plist (fh, fdh);
7099
7100 if (!fdh->elf.forced_local
7101 && fh->elf.dynindx != -1)
7102 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7103 return FALSE;
7104 }
7105
7106 /* Now that the info is on the function descriptor, clear the
7107 function code sym info. Any function code syms for which we
7108 don't have a definition in a regular file, we force local.
7109 This prevents a shared library from exporting syms that have
7110 been imported from another library. Function code syms that
7111 are really in the library we must leave global to prevent the
7112 linker dragging in a definition from a static library. */
7113 force_local = (!fh->elf.def_regular
7114 || fdh == NULL
7115 || !fdh->elf.def_regular
7116 || fdh->elf.forced_local);
7117 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7118
7119 return TRUE;
7120 }
7121
7122 static const struct sfpr_def_parms save_res_funcs[] =
7123 {
7124 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7125 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7126 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7127 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7128 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7129 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7130 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7131 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7132 { "._savef", 14, 31, savefpr, savefpr1_tail },
7133 { "._restf", 14, 31, restfpr, restfpr1_tail },
7134 { "_savevr_", 20, 31, savevr, savevr_tail },
7135 { "_restvr_", 20, 31, restvr, restvr_tail }
7136 };
7137
7138 /* Called near the start of bfd_elf_size_dynamic_sections. We use
7139 this hook to a) provide some gcc support functions, and b) transfer
7140 dynamic linking information gathered so far on function code symbol
7141 entries, to their corresponding function descriptor symbol entries. */
7142
7143 static bfd_boolean
7144 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7145 struct bfd_link_info *info)
7146 {
7147 struct ppc_link_hash_table *htab;
7148
7149 htab = ppc_hash_table (info);
7150 if (htab == NULL)
7151 return FALSE;
7152
7153 /* Provide any missing _save* and _rest* functions. */
7154 if (htab->sfpr != NULL)
7155 {
7156 unsigned int i;
7157
7158 htab->sfpr->size = 0;
7159 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7160 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7161 return FALSE;
7162 if (htab->sfpr->size == 0)
7163 htab->sfpr->flags |= SEC_EXCLUDE;
7164 }
7165
7166 if (bfd_link_relocatable (info))
7167 return TRUE;
7168
7169 if (htab->elf.hgot != NULL)
7170 {
7171 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7172 /* Make .TOC. defined so as to prevent it being made dynamic.
7173 The wrong value here is fixed later in ppc64_elf_set_toc. */
7174 if (!htab->elf.hgot->def_regular
7175 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7176 {
7177 htab->elf.hgot->root.type = bfd_link_hash_defined;
7178 htab->elf.hgot->root.u.def.value = 0;
7179 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7180 htab->elf.hgot->def_regular = 1;
7181 htab->elf.hgot->root.linker_def = 1;
7182 }
7183 htab->elf.hgot->type = STT_OBJECT;
7184 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7185 | STV_HIDDEN);
7186 }
7187
7188 if (htab->need_func_desc_adj)
7189 {
7190 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7191 htab->need_func_desc_adj = 0;
7192 }
7193
7194 return TRUE;
7195 }
7196
7197 /* Return true if we have dynamic relocs against H that apply to
7198 read-only sections. */
7199
7200 static bfd_boolean
7201 readonly_dynrelocs (struct elf_link_hash_entry *h)
7202 {
7203 struct ppc_link_hash_entry *eh;
7204 struct elf_dyn_relocs *p;
7205
7206 eh = (struct ppc_link_hash_entry *) h;
7207 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7208 {
7209 asection *s = p->sec->output_section;
7210
7211 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7212 return TRUE;
7213 }
7214 return FALSE;
7215 }
7216
7217 /* Return true if we have dynamic relocs against H or any of its weak
7218 aliases, that apply to read-only sections. */
7219
7220 static bfd_boolean
7221 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7222 {
7223 struct ppc_link_hash_entry *eh;
7224
7225 eh = (struct ppc_link_hash_entry *) h;
7226 do
7227 {
7228 if (readonly_dynrelocs (&eh->elf))
7229 return TRUE;
7230 eh = eh->weakref;
7231 } while (eh != NULL && &eh->elf != h);
7232
7233 return FALSE;
7234 }
7235
7236 /* Return whether EH has pc-relative dynamic relocs. */
7237
7238 static bfd_boolean
7239 pc_dynrelocs (struct ppc_link_hash_entry *eh)
7240 {
7241 struct elf_dyn_relocs *p;
7242
7243 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7244 if (p->pc_count != 0)
7245 return TRUE;
7246 return FALSE;
7247 }
7248
7249 /* Return true if a global entry stub will be created for H. Valid
7250 for ELFv2 before plt entries have been allocated. */
7251
7252 static bfd_boolean
7253 global_entry_stub (struct elf_link_hash_entry *h)
7254 {
7255 struct plt_entry *pent;
7256
7257 if (!h->pointer_equality_needed
7258 || h->def_regular)
7259 return FALSE;
7260
7261 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7262 if (pent->plt.refcount > 0
7263 && pent->addend == 0)
7264 return TRUE;
7265
7266 return FALSE;
7267 }
7268
7269 /* Adjust a symbol defined by a dynamic object and referenced by a
7270 regular object. The current definition is in some section of the
7271 dynamic object, but we're not including those sections. We have to
7272 change the definition to something the rest of the link can
7273 understand. */
7274
7275 static bfd_boolean
7276 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7277 struct elf_link_hash_entry *h)
7278 {
7279 struct ppc_link_hash_table *htab;
7280 asection *s, *srel;
7281
7282 htab = ppc_hash_table (info);
7283 if (htab == NULL)
7284 return FALSE;
7285
7286 /* Deal with function syms. */
7287 if (h->type == STT_FUNC
7288 || h->type == STT_GNU_IFUNC
7289 || h->needs_plt)
7290 {
7291 /* Clear procedure linkage table information for any symbol that
7292 won't need a .plt entry. */
7293 struct plt_entry *ent;
7294 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7295 if (ent->plt.refcount > 0)
7296 break;
7297 if (ent == NULL
7298 || (h->type != STT_GNU_IFUNC
7299 && (SYMBOL_CALLS_LOCAL (info, h)
7300 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7301 && h->root.type == bfd_link_hash_undefweak)))
7302 || ((struct ppc_link_hash_entry *) h)->save_res)
7303 {
7304 h->plt.plist = NULL;
7305 h->needs_plt = 0;
7306 h->pointer_equality_needed = 0;
7307 }
7308 else if (abiversion (info->output_bfd) >= 2)
7309 {
7310 /* Taking a function's address in a read/write section
7311 doesn't require us to define the function symbol in the
7312 executable on a global entry stub. A dynamic reloc can
7313 be used instead. The reason we prefer a few more dynamic
7314 relocs is that calling via a global entry stub costs a
7315 few more instructions, and pointer_equality_needed causes
7316 extra work in ld.so when resolving these symbols. */
7317 if (global_entry_stub (h)
7318 && !alias_readonly_dynrelocs (h))
7319 {
7320 h->pointer_equality_needed = 0;
7321 /* After adjust_dynamic_symbol, non_got_ref set in
7322 the non-pic case means that dyn_relocs for this
7323 symbol should be discarded. */
7324 h->non_got_ref = 0;
7325 }
7326
7327 /* If making a plt entry, then we don't need copy relocs. */
7328 return TRUE;
7329 }
7330 }
7331 else
7332 h->plt.plist = NULL;
7333
7334 /* If this is a weak symbol, and there is a real definition, the
7335 processor independent code will have arranged for us to see the
7336 real definition first, and we can just use the same value. */
7337 if (h->u.weakdef != NULL)
7338 {
7339 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7340 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7341 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7342 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7343 if (ELIMINATE_COPY_RELOCS)
7344 h->non_got_ref = h->u.weakdef->non_got_ref;
7345 return TRUE;
7346 }
7347
7348 /* If we are creating a shared library, we must presume that the
7349 only references to the symbol are via the global offset table.
7350 For such cases we need not do anything here; the relocations will
7351 be handled correctly by relocate_section. */
7352 if (bfd_link_pic (info))
7353 return TRUE;
7354
7355 /* If there are no references to this symbol that do not use the
7356 GOT, we don't need to generate a copy reloc. */
7357 if (!h->non_got_ref)
7358 return TRUE;
7359
7360 /* Don't generate a copy reloc for symbols defined in the executable. */
7361 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7362
7363 /* If -z nocopyreloc was given, don't generate them either. */
7364 || info->nocopyreloc
7365
7366 /* If we didn't find any dynamic relocs in read-only sections, then
7367 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7368 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7369
7370 /* Protected variables do not work with .dynbss. The copy in
7371 .dynbss won't be used by the shared library with the protected
7372 definition for the variable. Text relocations are preferable
7373 to an incorrect program. */
7374 || h->protected_def)
7375 {
7376 h->non_got_ref = 0;
7377 return TRUE;
7378 }
7379
7380 if (h->plt.plist != NULL)
7381 {
7382 /* We should never get here, but unfortunately there are versions
7383 of gcc out there that improperly (for this ABI) put initialized
7384 function pointers, vtable refs and suchlike in read-only
7385 sections. Allow them to proceed, but warn that this might
7386 break at runtime. */
7387 info->callbacks->einfo
7388 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7389 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7390 h->root.root.string);
7391 }
7392
7393 /* This is a reference to a symbol defined by a dynamic object which
7394 is not a function. */
7395
7396 /* We must allocate the symbol in our .dynbss section, which will
7397 become part of the .bss section of the executable. There will be
7398 an entry for this symbol in the .dynsym section. The dynamic
7399 object will contain position independent code, so all references
7400 from the dynamic object to this symbol will go through the global
7401 offset table. The dynamic linker will use the .dynsym entry to
7402 determine the address it must put in the global offset table, so
7403 both the dynamic object and the regular object will refer to the
7404 same memory location for the variable. */
7405
7406 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7407 to copy the initial value out of the dynamic object and into the
7408 runtime process image. We need to remember the offset into the
7409 .rela.bss section we are going to use. */
7410 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7411 {
7412 s = htab->elf.sdynrelro;
7413 srel = htab->elf.sreldynrelro;
7414 }
7415 else
7416 {
7417 s = htab->elf.sdynbss;
7418 srel = htab->elf.srelbss;
7419 }
7420 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7421 {
7422 srel->size += sizeof (Elf64_External_Rela);
7423 h->needs_copy = 1;
7424 }
7425
7426 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7427 }
7428
7429 /* If given a function descriptor symbol, hide both the function code
7430 sym and the descriptor. */
7431 static void
7432 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7433 struct elf_link_hash_entry *h,
7434 bfd_boolean force_local)
7435 {
7436 struct ppc_link_hash_entry *eh;
7437 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7438
7439 eh = (struct ppc_link_hash_entry *) h;
7440 if (eh->is_func_descriptor)
7441 {
7442 struct ppc_link_hash_entry *fh = eh->oh;
7443
7444 if (fh == NULL)
7445 {
7446 const char *p, *q;
7447 struct elf_link_hash_table *htab = elf_hash_table (info);
7448 char save;
7449
7450 /* We aren't supposed to use alloca in BFD because on
7451 systems which do not have alloca the version in libiberty
7452 calls xmalloc, which might cause the program to crash
7453 when it runs out of memory. This function doesn't have a
7454 return status, so there's no way to gracefully return an
7455 error. So cheat. We know that string[-1] can be safely
7456 accessed; It's either a string in an ELF string table,
7457 or allocated in an objalloc structure. */
7458
7459 p = eh->elf.root.root.string - 1;
7460 save = *p;
7461 *(char *) p = '.';
7462 fh = (struct ppc_link_hash_entry *)
7463 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7464 *(char *) p = save;
7465
7466 /* Unfortunately, if it so happens that the string we were
7467 looking for was allocated immediately before this string,
7468 then we overwrote the string terminator. That's the only
7469 reason the lookup should fail. */
7470 if (fh == NULL)
7471 {
7472 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7473 while (q >= eh->elf.root.root.string && *q == *p)
7474 --q, --p;
7475 if (q < eh->elf.root.root.string && *p == '.')
7476 fh = (struct ppc_link_hash_entry *)
7477 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7478 }
7479 if (fh != NULL)
7480 {
7481 eh->oh = fh;
7482 fh->oh = eh;
7483 }
7484 }
7485 if (fh != NULL)
7486 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7487 }
7488 }
7489
7490 static bfd_boolean
7491 get_sym_h (struct elf_link_hash_entry **hp,
7492 Elf_Internal_Sym **symp,
7493 asection **symsecp,
7494 unsigned char **tls_maskp,
7495 Elf_Internal_Sym **locsymsp,
7496 unsigned long r_symndx,
7497 bfd *ibfd)
7498 {
7499 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7500
7501 if (r_symndx >= symtab_hdr->sh_info)
7502 {
7503 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7504 struct elf_link_hash_entry *h;
7505
7506 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7507 h = elf_follow_link (h);
7508
7509 if (hp != NULL)
7510 *hp = h;
7511
7512 if (symp != NULL)
7513 *symp = NULL;
7514
7515 if (symsecp != NULL)
7516 {
7517 asection *symsec = NULL;
7518 if (h->root.type == bfd_link_hash_defined
7519 || h->root.type == bfd_link_hash_defweak)
7520 symsec = h->root.u.def.section;
7521 *symsecp = symsec;
7522 }
7523
7524 if (tls_maskp != NULL)
7525 {
7526 struct ppc_link_hash_entry *eh;
7527
7528 eh = (struct ppc_link_hash_entry *) h;
7529 *tls_maskp = &eh->tls_mask;
7530 }
7531 }
7532 else
7533 {
7534 Elf_Internal_Sym *sym;
7535 Elf_Internal_Sym *locsyms = *locsymsp;
7536
7537 if (locsyms == NULL)
7538 {
7539 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7540 if (locsyms == NULL)
7541 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7542 symtab_hdr->sh_info,
7543 0, NULL, NULL, NULL);
7544 if (locsyms == NULL)
7545 return FALSE;
7546 *locsymsp = locsyms;
7547 }
7548 sym = locsyms + r_symndx;
7549
7550 if (hp != NULL)
7551 *hp = NULL;
7552
7553 if (symp != NULL)
7554 *symp = sym;
7555
7556 if (symsecp != NULL)
7557 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7558
7559 if (tls_maskp != NULL)
7560 {
7561 struct got_entry **lgot_ents;
7562 unsigned char *tls_mask;
7563
7564 tls_mask = NULL;
7565 lgot_ents = elf_local_got_ents (ibfd);
7566 if (lgot_ents != NULL)
7567 {
7568 struct plt_entry **local_plt = (struct plt_entry **)
7569 (lgot_ents + symtab_hdr->sh_info);
7570 unsigned char *lgot_masks = (unsigned char *)
7571 (local_plt + symtab_hdr->sh_info);
7572 tls_mask = &lgot_masks[r_symndx];
7573 }
7574 *tls_maskp = tls_mask;
7575 }
7576 }
7577 return TRUE;
7578 }
7579
7580 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7581 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7582 type suitable for optimization, and 1 otherwise. */
7583
7584 static int
7585 get_tls_mask (unsigned char **tls_maskp,
7586 unsigned long *toc_symndx,
7587 bfd_vma *toc_addend,
7588 Elf_Internal_Sym **locsymsp,
7589 const Elf_Internal_Rela *rel,
7590 bfd *ibfd)
7591 {
7592 unsigned long r_symndx;
7593 int next_r;
7594 struct elf_link_hash_entry *h;
7595 Elf_Internal_Sym *sym;
7596 asection *sec;
7597 bfd_vma off;
7598
7599 r_symndx = ELF64_R_SYM (rel->r_info);
7600 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7601 return 0;
7602
7603 if ((*tls_maskp != NULL && **tls_maskp != 0)
7604 || sec == NULL
7605 || ppc64_elf_section_data (sec) == NULL
7606 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7607 return 1;
7608
7609 /* Look inside a TOC section too. */
7610 if (h != NULL)
7611 {
7612 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7613 off = h->root.u.def.value;
7614 }
7615 else
7616 off = sym->st_value;
7617 off += rel->r_addend;
7618 BFD_ASSERT (off % 8 == 0);
7619 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7620 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7621 if (toc_symndx != NULL)
7622 *toc_symndx = r_symndx;
7623 if (toc_addend != NULL)
7624 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7625 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7626 return 0;
7627 if ((h == NULL || is_static_defined (h))
7628 && (next_r == -1 || next_r == -2))
7629 return 1 - next_r;
7630 return 1;
7631 }
7632
7633 /* Find (or create) an entry in the tocsave hash table. */
7634
7635 static struct tocsave_entry *
7636 tocsave_find (struct ppc_link_hash_table *htab,
7637 enum insert_option insert,
7638 Elf_Internal_Sym **local_syms,
7639 const Elf_Internal_Rela *irela,
7640 bfd *ibfd)
7641 {
7642 unsigned long r_indx;
7643 struct elf_link_hash_entry *h;
7644 Elf_Internal_Sym *sym;
7645 struct tocsave_entry ent, *p;
7646 hashval_t hash;
7647 struct tocsave_entry **slot;
7648
7649 r_indx = ELF64_R_SYM (irela->r_info);
7650 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7651 return NULL;
7652 if (ent.sec == NULL || ent.sec->output_section == NULL)
7653 {
7654 _bfd_error_handler
7655 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd);
7656 return NULL;
7657 }
7658
7659 if (h != NULL)
7660 ent.offset = h->root.u.def.value;
7661 else
7662 ent.offset = sym->st_value;
7663 ent.offset += irela->r_addend;
7664
7665 hash = tocsave_htab_hash (&ent);
7666 slot = ((struct tocsave_entry **)
7667 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7668 if (slot == NULL)
7669 return NULL;
7670
7671 if (*slot == NULL)
7672 {
7673 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7674 if (p == NULL)
7675 return NULL;
7676 *p = ent;
7677 *slot = p;
7678 }
7679 return *slot;
7680 }
7681
7682 /* Adjust all global syms defined in opd sections. In gcc generated
7683 code for the old ABI, these will already have been done. */
7684
7685 static bfd_boolean
7686 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7687 {
7688 struct ppc_link_hash_entry *eh;
7689 asection *sym_sec;
7690 struct _opd_sec_data *opd;
7691
7692 if (h->root.type == bfd_link_hash_indirect)
7693 return TRUE;
7694
7695 if (h->root.type != bfd_link_hash_defined
7696 && h->root.type != bfd_link_hash_defweak)
7697 return TRUE;
7698
7699 eh = (struct ppc_link_hash_entry *) h;
7700 if (eh->adjust_done)
7701 return TRUE;
7702
7703 sym_sec = eh->elf.root.u.def.section;
7704 opd = get_opd_info (sym_sec);
7705 if (opd != NULL && opd->adjust != NULL)
7706 {
7707 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7708 if (adjust == -1)
7709 {
7710 /* This entry has been deleted. */
7711 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7712 if (dsec == NULL)
7713 {
7714 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7715 if (discarded_section (dsec))
7716 {
7717 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7718 break;
7719 }
7720 }
7721 eh->elf.root.u.def.value = 0;
7722 eh->elf.root.u.def.section = dsec;
7723 }
7724 else
7725 eh->elf.root.u.def.value += adjust;
7726 eh->adjust_done = 1;
7727 }
7728 return TRUE;
7729 }
7730
7731 /* Handles decrementing dynamic reloc counts for the reloc specified by
7732 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7733 have already been determined. */
7734
7735 static bfd_boolean
7736 dec_dynrel_count (bfd_vma r_info,
7737 asection *sec,
7738 struct bfd_link_info *info,
7739 Elf_Internal_Sym **local_syms,
7740 struct elf_link_hash_entry *h,
7741 Elf_Internal_Sym *sym)
7742 {
7743 enum elf_ppc64_reloc_type r_type;
7744 asection *sym_sec = NULL;
7745
7746 /* Can this reloc be dynamic? This switch, and later tests here
7747 should be kept in sync with the code in check_relocs. */
7748 r_type = ELF64_R_TYPE (r_info);
7749 switch (r_type)
7750 {
7751 default:
7752 return TRUE;
7753
7754 case R_PPC64_TPREL16:
7755 case R_PPC64_TPREL16_LO:
7756 case R_PPC64_TPREL16_HI:
7757 case R_PPC64_TPREL16_HA:
7758 case R_PPC64_TPREL16_DS:
7759 case R_PPC64_TPREL16_LO_DS:
7760 case R_PPC64_TPREL16_HIGH:
7761 case R_PPC64_TPREL16_HIGHA:
7762 case R_PPC64_TPREL16_HIGHER:
7763 case R_PPC64_TPREL16_HIGHERA:
7764 case R_PPC64_TPREL16_HIGHEST:
7765 case R_PPC64_TPREL16_HIGHESTA:
7766 if (!bfd_link_pic (info))
7767 return TRUE;
7768
7769 case R_PPC64_TPREL64:
7770 case R_PPC64_DTPMOD64:
7771 case R_PPC64_DTPREL64:
7772 case R_PPC64_ADDR64:
7773 case R_PPC64_REL30:
7774 case R_PPC64_REL32:
7775 case R_PPC64_REL64:
7776 case R_PPC64_ADDR14:
7777 case R_PPC64_ADDR14_BRNTAKEN:
7778 case R_PPC64_ADDR14_BRTAKEN:
7779 case R_PPC64_ADDR16:
7780 case R_PPC64_ADDR16_DS:
7781 case R_PPC64_ADDR16_HA:
7782 case R_PPC64_ADDR16_HI:
7783 case R_PPC64_ADDR16_HIGH:
7784 case R_PPC64_ADDR16_HIGHA:
7785 case R_PPC64_ADDR16_HIGHER:
7786 case R_PPC64_ADDR16_HIGHERA:
7787 case R_PPC64_ADDR16_HIGHEST:
7788 case R_PPC64_ADDR16_HIGHESTA:
7789 case R_PPC64_ADDR16_LO:
7790 case R_PPC64_ADDR16_LO_DS:
7791 case R_PPC64_ADDR24:
7792 case R_PPC64_ADDR32:
7793 case R_PPC64_UADDR16:
7794 case R_PPC64_UADDR32:
7795 case R_PPC64_UADDR64:
7796 case R_PPC64_TOC:
7797 break;
7798 }
7799
7800 if (local_syms != NULL)
7801 {
7802 unsigned long r_symndx;
7803 bfd *ibfd = sec->owner;
7804
7805 r_symndx = ELF64_R_SYM (r_info);
7806 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7807 return FALSE;
7808 }
7809
7810 if ((bfd_link_pic (info)
7811 && (must_be_dyn_reloc (info, r_type)
7812 || (h != NULL
7813 && (!SYMBOLIC_BIND (info, h)
7814 || h->root.type == bfd_link_hash_defweak
7815 || !h->def_regular))))
7816 || (ELIMINATE_COPY_RELOCS
7817 && !bfd_link_pic (info)
7818 && h != NULL
7819 && (h->root.type == bfd_link_hash_defweak
7820 || !h->def_regular)))
7821 ;
7822 else
7823 return TRUE;
7824
7825 if (h != NULL)
7826 {
7827 struct elf_dyn_relocs *p;
7828 struct elf_dyn_relocs **pp;
7829 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7830
7831 /* elf_gc_sweep may have already removed all dyn relocs associated
7832 with local syms for a given section. Also, symbol flags are
7833 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7834 report a dynreloc miscount. */
7835 if (*pp == NULL && info->gc_sections)
7836 return TRUE;
7837
7838 while ((p = *pp) != NULL)
7839 {
7840 if (p->sec == sec)
7841 {
7842 if (!must_be_dyn_reloc (info, r_type))
7843 p->pc_count -= 1;
7844 p->count -= 1;
7845 if (p->count == 0)
7846 *pp = p->next;
7847 return TRUE;
7848 }
7849 pp = &p->next;
7850 }
7851 }
7852 else
7853 {
7854 struct ppc_dyn_relocs *p;
7855 struct ppc_dyn_relocs **pp;
7856 void *vpp;
7857 bfd_boolean is_ifunc;
7858
7859 if (local_syms == NULL)
7860 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7861 if (sym_sec == NULL)
7862 sym_sec = sec;
7863
7864 vpp = &elf_section_data (sym_sec)->local_dynrel;
7865 pp = (struct ppc_dyn_relocs **) vpp;
7866
7867 if (*pp == NULL && info->gc_sections)
7868 return TRUE;
7869
7870 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7871 while ((p = *pp) != NULL)
7872 {
7873 if (p->sec == sec && p->ifunc == is_ifunc)
7874 {
7875 p->count -= 1;
7876 if (p->count == 0)
7877 *pp = p->next;
7878 return TRUE;
7879 }
7880 pp = &p->next;
7881 }
7882 }
7883
7884 /* xgettext:c-format */
7885 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7886 sec->owner, sec);
7887 bfd_set_error (bfd_error_bad_value);
7888 return FALSE;
7889 }
7890
7891 /* Remove unused Official Procedure Descriptor entries. Currently we
7892 only remove those associated with functions in discarded link-once
7893 sections, or weakly defined functions that have been overridden. It
7894 would be possible to remove many more entries for statically linked
7895 applications. */
7896
7897 bfd_boolean
7898 ppc64_elf_edit_opd (struct bfd_link_info *info)
7899 {
7900 bfd *ibfd;
7901 bfd_boolean some_edited = FALSE;
7902 asection *need_pad = NULL;
7903 struct ppc_link_hash_table *htab;
7904
7905 htab = ppc_hash_table (info);
7906 if (htab == NULL)
7907 return FALSE;
7908
7909 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7910 {
7911 asection *sec;
7912 Elf_Internal_Rela *relstart, *rel, *relend;
7913 Elf_Internal_Shdr *symtab_hdr;
7914 Elf_Internal_Sym *local_syms;
7915 struct _opd_sec_data *opd;
7916 bfd_boolean need_edit, add_aux_fields, broken;
7917 bfd_size_type cnt_16b = 0;
7918
7919 if (!is_ppc64_elf (ibfd))
7920 continue;
7921
7922 sec = bfd_get_section_by_name (ibfd, ".opd");
7923 if (sec == NULL || sec->size == 0)
7924 continue;
7925
7926 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7927 continue;
7928
7929 if (sec->output_section == bfd_abs_section_ptr)
7930 continue;
7931
7932 /* Look through the section relocs. */
7933 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7934 continue;
7935
7936 local_syms = NULL;
7937 symtab_hdr = &elf_symtab_hdr (ibfd);
7938
7939 /* Read the relocations. */
7940 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7941 info->keep_memory);
7942 if (relstart == NULL)
7943 return FALSE;
7944
7945 /* First run through the relocs to check they are sane, and to
7946 determine whether we need to edit this opd section. */
7947 need_edit = FALSE;
7948 broken = FALSE;
7949 need_pad = sec;
7950 relend = relstart + sec->reloc_count;
7951 for (rel = relstart; rel < relend; )
7952 {
7953 enum elf_ppc64_reloc_type r_type;
7954 unsigned long r_symndx;
7955 asection *sym_sec;
7956 struct elf_link_hash_entry *h;
7957 Elf_Internal_Sym *sym;
7958 bfd_vma offset;
7959
7960 /* .opd contains an array of 16 or 24 byte entries. We're
7961 only interested in the reloc pointing to a function entry
7962 point. */
7963 offset = rel->r_offset;
7964 if (rel + 1 == relend
7965 || rel[1].r_offset != offset + 8)
7966 {
7967 /* If someone messes with .opd alignment then after a
7968 "ld -r" we might have padding in the middle of .opd.
7969 Also, there's nothing to prevent someone putting
7970 something silly in .opd with the assembler. No .opd
7971 optimization for them! */
7972 broken_opd:
7973 _bfd_error_handler
7974 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7975 broken = TRUE;
7976 break;
7977 }
7978
7979 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7980 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7981 {
7982 _bfd_error_handler
7983 /* xgettext:c-format */
7984 (_("%B: unexpected reloc type %u in .opd section"),
7985 ibfd, r_type);
7986 broken = TRUE;
7987 break;
7988 }
7989
7990 r_symndx = ELF64_R_SYM (rel->r_info);
7991 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7992 r_symndx, ibfd))
7993 goto error_ret;
7994
7995 if (sym_sec == NULL || sym_sec->owner == NULL)
7996 {
7997 const char *sym_name;
7998 if (h != NULL)
7999 sym_name = h->root.root.string;
8000 else
8001 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8002 sym_sec);
8003
8004 _bfd_error_handler
8005 /* xgettext:c-format */
8006 (_("%B: undefined sym `%s' in .opd section"),
8007 ibfd, sym_name);
8008 broken = TRUE;
8009 break;
8010 }
8011
8012 /* opd entries are always for functions defined in the
8013 current input bfd. If the symbol isn't defined in the
8014 input bfd, then we won't be using the function in this
8015 bfd; It must be defined in a linkonce section in another
8016 bfd, or is weak. It's also possible that we are
8017 discarding the function due to a linker script /DISCARD/,
8018 which we test for via the output_section. */
8019 if (sym_sec->owner != ibfd
8020 || sym_sec->output_section == bfd_abs_section_ptr)
8021 need_edit = TRUE;
8022
8023 rel += 2;
8024 if (rel + 1 == relend
8025 || (rel + 2 < relend
8026 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
8027 ++rel;
8028
8029 if (rel == relend)
8030 {
8031 if (sec->size == offset + 24)
8032 {
8033 need_pad = NULL;
8034 break;
8035 }
8036 if (sec->size == offset + 16)
8037 {
8038 cnt_16b++;
8039 break;
8040 }
8041 goto broken_opd;
8042 }
8043 else if (rel + 1 < relend
8044 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8045 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8046 {
8047 if (rel[0].r_offset == offset + 16)
8048 cnt_16b++;
8049 else if (rel[0].r_offset != offset + 24)
8050 goto broken_opd;
8051 }
8052 else
8053 goto broken_opd;
8054 }
8055
8056 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8057
8058 if (!broken && (need_edit || add_aux_fields))
8059 {
8060 Elf_Internal_Rela *write_rel;
8061 Elf_Internal_Shdr *rel_hdr;
8062 bfd_byte *rptr, *wptr;
8063 bfd_byte *new_contents;
8064 bfd_size_type amt;
8065
8066 new_contents = NULL;
8067 amt = OPD_NDX (sec->size) * sizeof (long);
8068 opd = &ppc64_elf_section_data (sec)->u.opd;
8069 opd->adjust = bfd_zalloc (sec->owner, amt);
8070 if (opd->adjust == NULL)
8071 return FALSE;
8072 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8073
8074 /* This seems a waste of time as input .opd sections are all
8075 zeros as generated by gcc, but I suppose there's no reason
8076 this will always be so. We might start putting something in
8077 the third word of .opd entries. */
8078 if ((sec->flags & SEC_IN_MEMORY) == 0)
8079 {
8080 bfd_byte *loc;
8081 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8082 {
8083 if (loc != NULL)
8084 free (loc);
8085 error_ret:
8086 if (local_syms != NULL
8087 && symtab_hdr->contents != (unsigned char *) local_syms)
8088 free (local_syms);
8089 if (elf_section_data (sec)->relocs != relstart)
8090 free (relstart);
8091 return FALSE;
8092 }
8093 sec->contents = loc;
8094 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8095 }
8096
8097 elf_section_data (sec)->relocs = relstart;
8098
8099 new_contents = sec->contents;
8100 if (add_aux_fields)
8101 {
8102 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8103 if (new_contents == NULL)
8104 return FALSE;
8105 need_pad = NULL;
8106 }
8107 wptr = new_contents;
8108 rptr = sec->contents;
8109 write_rel = relstart;
8110 for (rel = relstart; rel < relend; )
8111 {
8112 unsigned long r_symndx;
8113 asection *sym_sec;
8114 struct elf_link_hash_entry *h;
8115 struct ppc_link_hash_entry *fdh = NULL;
8116 Elf_Internal_Sym *sym;
8117 long opd_ent_size;
8118 Elf_Internal_Rela *next_rel;
8119 bfd_boolean skip;
8120
8121 r_symndx = ELF64_R_SYM (rel->r_info);
8122 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8123 r_symndx, ibfd))
8124 goto error_ret;
8125
8126 next_rel = rel + 2;
8127 if (next_rel + 1 == relend
8128 || (next_rel + 2 < relend
8129 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8130 ++next_rel;
8131
8132 /* See if the .opd entry is full 24 byte or
8133 16 byte (with fd_aux entry overlapped with next
8134 fd_func). */
8135 opd_ent_size = 24;
8136 if (next_rel == relend)
8137 {
8138 if (sec->size == rel->r_offset + 16)
8139 opd_ent_size = 16;
8140 }
8141 else if (next_rel->r_offset == rel->r_offset + 16)
8142 opd_ent_size = 16;
8143
8144 if (h != NULL
8145 && h->root.root.string[0] == '.')
8146 {
8147 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8148 if (fdh != NULL)
8149 {
8150 fdh = ppc_follow_link (fdh);
8151 if (fdh->elf.root.type != bfd_link_hash_defined
8152 && fdh->elf.root.type != bfd_link_hash_defweak)
8153 fdh = NULL;
8154 }
8155 }
8156
8157 skip = (sym_sec->owner != ibfd
8158 || sym_sec->output_section == bfd_abs_section_ptr);
8159 if (skip)
8160 {
8161 if (fdh != NULL && sym_sec->owner == ibfd)
8162 {
8163 /* Arrange for the function descriptor sym
8164 to be dropped. */
8165 fdh->elf.root.u.def.value = 0;
8166 fdh->elf.root.u.def.section = sym_sec;
8167 }
8168 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8169
8170 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8171 rel = next_rel;
8172 else
8173 while (1)
8174 {
8175 if (!dec_dynrel_count (rel->r_info, sec, info,
8176 NULL, h, sym))
8177 goto error_ret;
8178
8179 if (++rel == next_rel)
8180 break;
8181
8182 r_symndx = ELF64_R_SYM (rel->r_info);
8183 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8184 r_symndx, ibfd))
8185 goto error_ret;
8186 }
8187 }
8188 else
8189 {
8190 /* We'll be keeping this opd entry. */
8191 long adjust;
8192
8193 if (fdh != NULL)
8194 {
8195 /* Redefine the function descriptor symbol to
8196 this location in the opd section. It is
8197 necessary to update the value here rather
8198 than using an array of adjustments as we do
8199 for local symbols, because various places
8200 in the generic ELF code use the value
8201 stored in u.def.value. */
8202 fdh->elf.root.u.def.value = wptr - new_contents;
8203 fdh->adjust_done = 1;
8204 }
8205
8206 /* Local syms are a bit tricky. We could
8207 tweak them as they can be cached, but
8208 we'd need to look through the local syms
8209 for the function descriptor sym which we
8210 don't have at the moment. So keep an
8211 array of adjustments. */
8212 adjust = (wptr - new_contents) - (rptr - sec->contents);
8213 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8214
8215 if (wptr != rptr)
8216 memcpy (wptr, rptr, opd_ent_size);
8217 wptr += opd_ent_size;
8218 if (add_aux_fields && opd_ent_size == 16)
8219 {
8220 memset (wptr, '\0', 8);
8221 wptr += 8;
8222 }
8223
8224 /* We need to adjust any reloc offsets to point to the
8225 new opd entries. */
8226 for ( ; rel != next_rel; ++rel)
8227 {
8228 rel->r_offset += adjust;
8229 if (write_rel != rel)
8230 memcpy (write_rel, rel, sizeof (*rel));
8231 ++write_rel;
8232 }
8233 }
8234
8235 rptr += opd_ent_size;
8236 }
8237
8238 sec->size = wptr - new_contents;
8239 sec->reloc_count = write_rel - relstart;
8240 if (add_aux_fields)
8241 {
8242 free (sec->contents);
8243 sec->contents = new_contents;
8244 }
8245
8246 /* Fudge the header size too, as this is used later in
8247 elf_bfd_final_link if we are emitting relocs. */
8248 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8249 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8250 some_edited = TRUE;
8251 }
8252 else if (elf_section_data (sec)->relocs != relstart)
8253 free (relstart);
8254
8255 if (local_syms != NULL
8256 && symtab_hdr->contents != (unsigned char *) local_syms)
8257 {
8258 if (!info->keep_memory)
8259 free (local_syms);
8260 else
8261 symtab_hdr->contents = (unsigned char *) local_syms;
8262 }
8263 }
8264
8265 if (some_edited)
8266 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8267
8268 /* If we are doing a final link and the last .opd entry is just 16 byte
8269 long, add a 8 byte padding after it. */
8270 if (need_pad != NULL && !bfd_link_relocatable (info))
8271 {
8272 bfd_byte *p;
8273
8274 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8275 {
8276 BFD_ASSERT (need_pad->size > 0);
8277
8278 p = bfd_malloc (need_pad->size + 8);
8279 if (p == NULL)
8280 return FALSE;
8281
8282 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8283 p, 0, need_pad->size))
8284 return FALSE;
8285
8286 need_pad->contents = p;
8287 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8288 }
8289 else
8290 {
8291 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8292 if (p == NULL)
8293 return FALSE;
8294
8295 need_pad->contents = p;
8296 }
8297
8298 memset (need_pad->contents + need_pad->size, 0, 8);
8299 need_pad->size += 8;
8300 }
8301
8302 return TRUE;
8303 }
8304
8305 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8306
8307 asection *
8308 ppc64_elf_tls_setup (struct bfd_link_info *info)
8309 {
8310 struct ppc_link_hash_table *htab;
8311
8312 htab = ppc_hash_table (info);
8313 if (htab == NULL)
8314 return NULL;
8315
8316 if (abiversion (info->output_bfd) == 1)
8317 htab->opd_abi = 1;
8318
8319 if (htab->params->no_multi_toc)
8320 htab->do_multi_toc = 0;
8321 else if (!htab->do_multi_toc)
8322 htab->params->no_multi_toc = 1;
8323
8324 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8325 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8326 FALSE, FALSE, TRUE));
8327 /* Move dynamic linking info to the function descriptor sym. */
8328 if (htab->tls_get_addr != NULL)
8329 func_desc_adjust (&htab->tls_get_addr->elf, info);
8330 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8331 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8332 FALSE, FALSE, TRUE));
8333 if (htab->params->tls_get_addr_opt)
8334 {
8335 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8336
8337 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8338 FALSE, FALSE, TRUE);
8339 if (opt != NULL)
8340 func_desc_adjust (opt, info);
8341 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8342 FALSE, FALSE, TRUE);
8343 if (opt_fd != NULL
8344 && (opt_fd->root.type == bfd_link_hash_defined
8345 || opt_fd->root.type == bfd_link_hash_defweak))
8346 {
8347 /* If glibc supports an optimized __tls_get_addr call stub,
8348 signalled by the presence of __tls_get_addr_opt, and we'll
8349 be calling __tls_get_addr via a plt call stub, then
8350 make __tls_get_addr point to __tls_get_addr_opt. */
8351 tga_fd = &htab->tls_get_addr_fd->elf;
8352 if (htab->elf.dynamic_sections_created
8353 && tga_fd != NULL
8354 && (tga_fd->type == STT_FUNC
8355 || tga_fd->needs_plt)
8356 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8357 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8358 && tga_fd->root.type == bfd_link_hash_undefweak)))
8359 {
8360 struct plt_entry *ent;
8361
8362 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8363 if (ent->plt.refcount > 0)
8364 break;
8365 if (ent != NULL)
8366 {
8367 tga_fd->root.type = bfd_link_hash_indirect;
8368 tga_fd->root.u.i.link = &opt_fd->root;
8369 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8370 opt_fd->mark = 1;
8371 if (opt_fd->dynindx != -1)
8372 {
8373 /* Use __tls_get_addr_opt in dynamic relocations. */
8374 opt_fd->dynindx = -1;
8375 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8376 opt_fd->dynstr_index);
8377 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8378 return NULL;
8379 }
8380 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8381 tga = &htab->tls_get_addr->elf;
8382 if (opt != NULL && tga != NULL)
8383 {
8384 tga->root.type = bfd_link_hash_indirect;
8385 tga->root.u.i.link = &opt->root;
8386 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8387 opt->mark = 1;
8388 _bfd_elf_link_hash_hide_symbol (info, opt,
8389 tga->forced_local);
8390 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8391 }
8392 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8393 htab->tls_get_addr_fd->is_func_descriptor = 1;
8394 if (htab->tls_get_addr != NULL)
8395 {
8396 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8397 htab->tls_get_addr->is_func = 1;
8398 }
8399 }
8400 }
8401 }
8402 else if (htab->params->tls_get_addr_opt < 0)
8403 htab->params->tls_get_addr_opt = 0;
8404 }
8405 return _bfd_elf_tls_setup (info->output_bfd, info);
8406 }
8407
8408 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8409 HASH1 or HASH2. */
8410
8411 static bfd_boolean
8412 branch_reloc_hash_match (const bfd *ibfd,
8413 const Elf_Internal_Rela *rel,
8414 const struct ppc_link_hash_entry *hash1,
8415 const struct ppc_link_hash_entry *hash2)
8416 {
8417 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8418 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8419 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8420
8421 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8422 {
8423 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8424 struct elf_link_hash_entry *h;
8425
8426 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8427 h = elf_follow_link (h);
8428 if (h == &hash1->elf || h == &hash2->elf)
8429 return TRUE;
8430 }
8431 return FALSE;
8432 }
8433
8434 /* Run through all the TLS relocs looking for optimization
8435 opportunities. The linker has been hacked (see ppc64elf.em) to do
8436 a preliminary section layout so that we know the TLS segment
8437 offsets. We can't optimize earlier because some optimizations need
8438 to know the tp offset, and we need to optimize before allocating
8439 dynamic relocations. */
8440
8441 bfd_boolean
8442 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8443 {
8444 bfd *ibfd;
8445 asection *sec;
8446 struct ppc_link_hash_table *htab;
8447 unsigned char *toc_ref;
8448 int pass;
8449
8450 if (!bfd_link_executable (info))
8451 return TRUE;
8452
8453 htab = ppc_hash_table (info);
8454 if (htab == NULL)
8455 return FALSE;
8456
8457 /* Make two passes over the relocs. On the first pass, mark toc
8458 entries involved with tls relocs, and check that tls relocs
8459 involved in setting up a tls_get_addr call are indeed followed by
8460 such a call. If they are not, we can't do any tls optimization.
8461 On the second pass twiddle tls_mask flags to notify
8462 relocate_section that optimization can be done, and adjust got
8463 and plt refcounts. */
8464 toc_ref = NULL;
8465 for (pass = 0; pass < 2; ++pass)
8466 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8467 {
8468 Elf_Internal_Sym *locsyms = NULL;
8469 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8470
8471 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8472 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8473 {
8474 Elf_Internal_Rela *relstart, *rel, *relend;
8475 bfd_boolean found_tls_get_addr_arg = 0;
8476
8477 /* Read the relocations. */
8478 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8479 info->keep_memory);
8480 if (relstart == NULL)
8481 {
8482 free (toc_ref);
8483 return FALSE;
8484 }
8485
8486 relend = relstart + sec->reloc_count;
8487 for (rel = relstart; rel < relend; rel++)
8488 {
8489 enum elf_ppc64_reloc_type r_type;
8490 unsigned long r_symndx;
8491 struct elf_link_hash_entry *h;
8492 Elf_Internal_Sym *sym;
8493 asection *sym_sec;
8494 unsigned char *tls_mask;
8495 unsigned char tls_set, tls_clear, tls_type = 0;
8496 bfd_vma value;
8497 bfd_boolean ok_tprel, is_local;
8498 long toc_ref_index = 0;
8499 int expecting_tls_get_addr = 0;
8500 bfd_boolean ret = FALSE;
8501
8502 r_symndx = ELF64_R_SYM (rel->r_info);
8503 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8504 r_symndx, ibfd))
8505 {
8506 err_free_rel:
8507 if (elf_section_data (sec)->relocs != relstart)
8508 free (relstart);
8509 if (toc_ref != NULL)
8510 free (toc_ref);
8511 if (locsyms != NULL
8512 && (elf_symtab_hdr (ibfd).contents
8513 != (unsigned char *) locsyms))
8514 free (locsyms);
8515 return ret;
8516 }
8517
8518 if (h != NULL)
8519 {
8520 if (h->root.type == bfd_link_hash_defined
8521 || h->root.type == bfd_link_hash_defweak)
8522 value = h->root.u.def.value;
8523 else if (h->root.type == bfd_link_hash_undefweak)
8524 value = 0;
8525 else
8526 {
8527 found_tls_get_addr_arg = 0;
8528 continue;
8529 }
8530 }
8531 else
8532 /* Symbols referenced by TLS relocs must be of type
8533 STT_TLS. So no need for .opd local sym adjust. */
8534 value = sym->st_value;
8535
8536 ok_tprel = FALSE;
8537 is_local = FALSE;
8538 if (h == NULL
8539 || !h->def_dynamic)
8540 {
8541 is_local = TRUE;
8542 if (h != NULL
8543 && h->root.type == bfd_link_hash_undefweak)
8544 ok_tprel = TRUE;
8545 else if (sym_sec != NULL
8546 && sym_sec->output_section != NULL)
8547 {
8548 value += sym_sec->output_offset;
8549 value += sym_sec->output_section->vma;
8550 value -= htab->elf.tls_sec->vma;
8551 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8552 < (bfd_vma) 1 << 32);
8553 }
8554 }
8555
8556 r_type = ELF64_R_TYPE (rel->r_info);
8557 /* If this section has old-style __tls_get_addr calls
8558 without marker relocs, then check that each
8559 __tls_get_addr call reloc is preceded by a reloc
8560 that conceivably belongs to the __tls_get_addr arg
8561 setup insn. If we don't find matching arg setup
8562 relocs, don't do any tls optimization. */
8563 if (pass == 0
8564 && sec->has_tls_get_addr_call
8565 && h != NULL
8566 && (h == &htab->tls_get_addr->elf
8567 || h == &htab->tls_get_addr_fd->elf)
8568 && !found_tls_get_addr_arg
8569 && is_branch_reloc (r_type))
8570 {
8571 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8572 "TLS optimization disabled\n"),
8573 ibfd, sec, rel->r_offset);
8574 ret = TRUE;
8575 goto err_free_rel;
8576 }
8577
8578 found_tls_get_addr_arg = 0;
8579 switch (r_type)
8580 {
8581 case R_PPC64_GOT_TLSLD16:
8582 case R_PPC64_GOT_TLSLD16_LO:
8583 expecting_tls_get_addr = 1;
8584 found_tls_get_addr_arg = 1;
8585 /* Fall through. */
8586
8587 case R_PPC64_GOT_TLSLD16_HI:
8588 case R_PPC64_GOT_TLSLD16_HA:
8589 /* These relocs should never be against a symbol
8590 defined in a shared lib. Leave them alone if
8591 that turns out to be the case. */
8592 if (!is_local)
8593 continue;
8594
8595 /* LD -> LE */
8596 tls_set = 0;
8597 tls_clear = TLS_LD;
8598 tls_type = TLS_TLS | TLS_LD;
8599 break;
8600
8601 case R_PPC64_GOT_TLSGD16:
8602 case R_PPC64_GOT_TLSGD16_LO:
8603 expecting_tls_get_addr = 1;
8604 found_tls_get_addr_arg = 1;
8605 /* Fall through. */
8606
8607 case R_PPC64_GOT_TLSGD16_HI:
8608 case R_PPC64_GOT_TLSGD16_HA:
8609 if (ok_tprel)
8610 /* GD -> LE */
8611 tls_set = 0;
8612 else
8613 /* GD -> IE */
8614 tls_set = TLS_TLS | TLS_TPRELGD;
8615 tls_clear = TLS_GD;
8616 tls_type = TLS_TLS | TLS_GD;
8617 break;
8618
8619 case R_PPC64_GOT_TPREL16_DS:
8620 case R_PPC64_GOT_TPREL16_LO_DS:
8621 case R_PPC64_GOT_TPREL16_HI:
8622 case R_PPC64_GOT_TPREL16_HA:
8623 if (ok_tprel)
8624 {
8625 /* IE -> LE */
8626 tls_set = 0;
8627 tls_clear = TLS_TPREL;
8628 tls_type = TLS_TLS | TLS_TPREL;
8629 break;
8630 }
8631 continue;
8632
8633 case R_PPC64_TLSGD:
8634 case R_PPC64_TLSLD:
8635 found_tls_get_addr_arg = 1;
8636 /* Fall through. */
8637
8638 case R_PPC64_TLS:
8639 case R_PPC64_TOC16:
8640 case R_PPC64_TOC16_LO:
8641 if (sym_sec == NULL || sym_sec != toc)
8642 continue;
8643
8644 /* Mark this toc entry as referenced by a TLS
8645 code sequence. We can do that now in the
8646 case of R_PPC64_TLS, and after checking for
8647 tls_get_addr for the TOC16 relocs. */
8648 if (toc_ref == NULL)
8649 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8650 if (toc_ref == NULL)
8651 goto err_free_rel;
8652
8653 if (h != NULL)
8654 value = h->root.u.def.value;
8655 else
8656 value = sym->st_value;
8657 value += rel->r_addend;
8658 if (value % 8 != 0)
8659 continue;
8660 BFD_ASSERT (value < toc->size
8661 && toc->output_offset % 8 == 0);
8662 toc_ref_index = (value + toc->output_offset) / 8;
8663 if (r_type == R_PPC64_TLS
8664 || r_type == R_PPC64_TLSGD
8665 || r_type == R_PPC64_TLSLD)
8666 {
8667 toc_ref[toc_ref_index] = 1;
8668 continue;
8669 }
8670
8671 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8672 continue;
8673
8674 tls_set = 0;
8675 tls_clear = 0;
8676 expecting_tls_get_addr = 2;
8677 break;
8678
8679 case R_PPC64_TPREL64:
8680 if (pass == 0
8681 || sec != toc
8682 || toc_ref == NULL
8683 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8684 continue;
8685 if (ok_tprel)
8686 {
8687 /* IE -> LE */
8688 tls_set = TLS_EXPLICIT;
8689 tls_clear = TLS_TPREL;
8690 break;
8691 }
8692 continue;
8693
8694 case R_PPC64_DTPMOD64:
8695 if (pass == 0
8696 || sec != toc
8697 || toc_ref == NULL
8698 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8699 continue;
8700 if (rel + 1 < relend
8701 && (rel[1].r_info
8702 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8703 && rel[1].r_offset == rel->r_offset + 8)
8704 {
8705 if (ok_tprel)
8706 /* GD -> LE */
8707 tls_set = TLS_EXPLICIT | TLS_GD;
8708 else
8709 /* GD -> IE */
8710 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8711 tls_clear = TLS_GD;
8712 }
8713 else
8714 {
8715 if (!is_local)
8716 continue;
8717
8718 /* LD -> LE */
8719 tls_set = TLS_EXPLICIT;
8720 tls_clear = TLS_LD;
8721 }
8722 break;
8723
8724 default:
8725 continue;
8726 }
8727
8728 if (pass == 0)
8729 {
8730 if (!expecting_tls_get_addr
8731 || !sec->has_tls_get_addr_call)
8732 continue;
8733
8734 if (rel + 1 < relend
8735 && branch_reloc_hash_match (ibfd, rel + 1,
8736 htab->tls_get_addr,
8737 htab->tls_get_addr_fd))
8738 {
8739 if (expecting_tls_get_addr == 2)
8740 {
8741 /* Check for toc tls entries. */
8742 unsigned char *toc_tls;
8743 int retval;
8744
8745 retval = get_tls_mask (&toc_tls, NULL, NULL,
8746 &locsyms,
8747 rel, ibfd);
8748 if (retval == 0)
8749 goto err_free_rel;
8750 if (toc_tls != NULL)
8751 {
8752 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8753 found_tls_get_addr_arg = 1;
8754 if (retval > 1)
8755 toc_ref[toc_ref_index] = 1;
8756 }
8757 }
8758 continue;
8759 }
8760
8761 if (expecting_tls_get_addr != 1)
8762 continue;
8763
8764 /* Uh oh, we didn't find the expected call. We
8765 could just mark this symbol to exclude it
8766 from tls optimization but it's safer to skip
8767 the entire optimization. */
8768 /* xgettext:c-format */
8769 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8770 "TLS optimization disabled\n"),
8771 ibfd, sec, rel->r_offset);
8772 ret = TRUE;
8773 goto err_free_rel;
8774 }
8775
8776 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8777 {
8778 struct plt_entry *ent;
8779 for (ent = htab->tls_get_addr->elf.plt.plist;
8780 ent != NULL;
8781 ent = ent->next)
8782 if (ent->addend == 0)
8783 {
8784 if (ent->plt.refcount > 0)
8785 {
8786 ent->plt.refcount -= 1;
8787 expecting_tls_get_addr = 0;
8788 }
8789 break;
8790 }
8791 }
8792
8793 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8794 {
8795 struct plt_entry *ent;
8796 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8797 ent != NULL;
8798 ent = ent->next)
8799 if (ent->addend == 0)
8800 {
8801 if (ent->plt.refcount > 0)
8802 ent->plt.refcount -= 1;
8803 break;
8804 }
8805 }
8806
8807 if (tls_clear == 0)
8808 continue;
8809
8810 if ((tls_set & TLS_EXPLICIT) == 0)
8811 {
8812 struct got_entry *ent;
8813
8814 /* Adjust got entry for this reloc. */
8815 if (h != NULL)
8816 ent = h->got.glist;
8817 else
8818 ent = elf_local_got_ents (ibfd)[r_symndx];
8819
8820 for (; ent != NULL; ent = ent->next)
8821 if (ent->addend == rel->r_addend
8822 && ent->owner == ibfd
8823 && ent->tls_type == tls_type)
8824 break;
8825 if (ent == NULL)
8826 abort ();
8827
8828 if (tls_set == 0)
8829 {
8830 /* We managed to get rid of a got entry. */
8831 if (ent->got.refcount > 0)
8832 ent->got.refcount -= 1;
8833 }
8834 }
8835 else
8836 {
8837 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8838 we'll lose one or two dyn relocs. */
8839 if (!dec_dynrel_count (rel->r_info, sec, info,
8840 NULL, h, sym))
8841 return FALSE;
8842
8843 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8844 {
8845 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8846 NULL, h, sym))
8847 return FALSE;
8848 }
8849 }
8850
8851 *tls_mask |= tls_set;
8852 *tls_mask &= ~tls_clear;
8853 }
8854
8855 if (elf_section_data (sec)->relocs != relstart)
8856 free (relstart);
8857 }
8858
8859 if (locsyms != NULL
8860 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8861 {
8862 if (!info->keep_memory)
8863 free (locsyms);
8864 else
8865 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8866 }
8867 }
8868
8869 if (toc_ref != NULL)
8870 free (toc_ref);
8871 return TRUE;
8872 }
8873
8874 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8875 the values of any global symbols in a toc section that has been
8876 edited. Globals in toc sections should be a rarity, so this function
8877 sets a flag if any are found in toc sections other than the one just
8878 edited, so that futher hash table traversals can be avoided. */
8879
8880 struct adjust_toc_info
8881 {
8882 asection *toc;
8883 unsigned long *skip;
8884 bfd_boolean global_toc_syms;
8885 };
8886
8887 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8888
8889 static bfd_boolean
8890 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8891 {
8892 struct ppc_link_hash_entry *eh;
8893 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8894 unsigned long i;
8895
8896 if (h->root.type != bfd_link_hash_defined
8897 && h->root.type != bfd_link_hash_defweak)
8898 return TRUE;
8899
8900 eh = (struct ppc_link_hash_entry *) h;
8901 if (eh->adjust_done)
8902 return TRUE;
8903
8904 if (eh->elf.root.u.def.section == toc_inf->toc)
8905 {
8906 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8907 i = toc_inf->toc->rawsize >> 3;
8908 else
8909 i = eh->elf.root.u.def.value >> 3;
8910
8911 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8912 {
8913 _bfd_error_handler
8914 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8915 do
8916 ++i;
8917 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8918 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8919 }
8920
8921 eh->elf.root.u.def.value -= toc_inf->skip[i];
8922 eh->adjust_done = 1;
8923 }
8924 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8925 toc_inf->global_toc_syms = TRUE;
8926
8927 return TRUE;
8928 }
8929
8930 /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8931 on a _LO variety toc/got reloc. */
8932
8933 static bfd_boolean
8934 ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8935 {
8936 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8937 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8938 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8939 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8940 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8941 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8942 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8943 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8944 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8945 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8946 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8947 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8948 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8949 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8950 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8951 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8952 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8953 /* Exclude lfqu by testing reloc. If relocs are ever
8954 defined for the reduced D field in psq_lu then those
8955 will need testing too. */
8956 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8957 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8958 && (insn & 1) == 0)
8959 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8960 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8961 /* Exclude stfqu. psq_stu as above for psq_lu. */
8962 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8963 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8964 && (insn & 1) == 0));
8965 }
8966
8967 /* Examine all relocs referencing .toc sections in order to remove
8968 unused .toc entries. */
8969
8970 bfd_boolean
8971 ppc64_elf_edit_toc (struct bfd_link_info *info)
8972 {
8973 bfd *ibfd;
8974 struct adjust_toc_info toc_inf;
8975 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8976
8977 htab->do_toc_opt = 1;
8978 toc_inf.global_toc_syms = TRUE;
8979 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8980 {
8981 asection *toc, *sec;
8982 Elf_Internal_Shdr *symtab_hdr;
8983 Elf_Internal_Sym *local_syms;
8984 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8985 unsigned long *skip, *drop;
8986 unsigned char *used;
8987 unsigned char *keep, last, some_unused;
8988
8989 if (!is_ppc64_elf (ibfd))
8990 continue;
8991
8992 toc = bfd_get_section_by_name (ibfd, ".toc");
8993 if (toc == NULL
8994 || toc->size == 0
8995 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8996 || discarded_section (toc))
8997 continue;
8998
8999 toc_relocs = NULL;
9000 local_syms = NULL;
9001 symtab_hdr = &elf_symtab_hdr (ibfd);
9002
9003 /* Look at sections dropped from the final link. */
9004 skip = NULL;
9005 relstart = NULL;
9006 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9007 {
9008 if (sec->reloc_count == 0
9009 || !discarded_section (sec)
9010 || get_opd_info (sec)
9011 || (sec->flags & SEC_ALLOC) == 0
9012 || (sec->flags & SEC_DEBUGGING) != 0)
9013 continue;
9014
9015 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
9016 if (relstart == NULL)
9017 goto error_ret;
9018
9019 /* Run through the relocs to see which toc entries might be
9020 unused. */
9021 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9022 {
9023 enum elf_ppc64_reloc_type r_type;
9024 unsigned long r_symndx;
9025 asection *sym_sec;
9026 struct elf_link_hash_entry *h;
9027 Elf_Internal_Sym *sym;
9028 bfd_vma val;
9029
9030 r_type = ELF64_R_TYPE (rel->r_info);
9031 switch (r_type)
9032 {
9033 default:
9034 continue;
9035
9036 case R_PPC64_TOC16:
9037 case R_PPC64_TOC16_LO:
9038 case R_PPC64_TOC16_HI:
9039 case R_PPC64_TOC16_HA:
9040 case R_PPC64_TOC16_DS:
9041 case R_PPC64_TOC16_LO_DS:
9042 break;
9043 }
9044
9045 r_symndx = ELF64_R_SYM (rel->r_info);
9046 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9047 r_symndx, ibfd))
9048 goto error_ret;
9049
9050 if (sym_sec != toc)
9051 continue;
9052
9053 if (h != NULL)
9054 val = h->root.u.def.value;
9055 else
9056 val = sym->st_value;
9057 val += rel->r_addend;
9058
9059 if (val >= toc->size)
9060 continue;
9061
9062 /* Anything in the toc ought to be aligned to 8 bytes.
9063 If not, don't mark as unused. */
9064 if (val & 7)
9065 continue;
9066
9067 if (skip == NULL)
9068 {
9069 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9070 if (skip == NULL)
9071 goto error_ret;
9072 }
9073
9074 skip[val >> 3] = ref_from_discarded;
9075 }
9076
9077 if (elf_section_data (sec)->relocs != relstart)
9078 free (relstart);
9079 }
9080
9081 /* For largetoc loads of address constants, we can convert
9082 . addis rx,2,addr@got@ha
9083 . ld ry,addr@got@l(rx)
9084 to
9085 . addis rx,2,addr@toc@ha
9086 . addi ry,rx,addr@toc@l
9087 when addr is within 2G of the toc pointer. This then means
9088 that the word storing "addr" in the toc is no longer needed. */
9089
9090 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9091 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9092 && toc->reloc_count != 0)
9093 {
9094 /* Read toc relocs. */
9095 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9096 info->keep_memory);
9097 if (toc_relocs == NULL)
9098 goto error_ret;
9099
9100 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9101 {
9102 enum elf_ppc64_reloc_type r_type;
9103 unsigned long r_symndx;
9104 asection *sym_sec;
9105 struct elf_link_hash_entry *h;
9106 Elf_Internal_Sym *sym;
9107 bfd_vma val, addr;
9108
9109 r_type = ELF64_R_TYPE (rel->r_info);
9110 if (r_type != R_PPC64_ADDR64)
9111 continue;
9112
9113 r_symndx = ELF64_R_SYM (rel->r_info);
9114 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9115 r_symndx, ibfd))
9116 goto error_ret;
9117
9118 if (sym_sec == NULL
9119 || sym_sec->output_section == NULL
9120 || discarded_section (sym_sec))
9121 continue;
9122
9123 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9124 continue;
9125
9126 if (h != NULL)
9127 {
9128 if (h->type == STT_GNU_IFUNC)
9129 continue;
9130 val = h->root.u.def.value;
9131 }
9132 else
9133 {
9134 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9135 continue;
9136 val = sym->st_value;
9137 }
9138 val += rel->r_addend;
9139 val += sym_sec->output_section->vma + sym_sec->output_offset;
9140
9141 /* We don't yet know the exact toc pointer value, but we
9142 know it will be somewhere in the toc section. Don't
9143 optimize if the difference from any possible toc
9144 pointer is outside [ff..f80008000, 7fff7fff]. */
9145 addr = toc->output_section->vma + TOC_BASE_OFF;
9146 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9147 continue;
9148
9149 addr = toc->output_section->vma + toc->output_section->rawsize;
9150 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9151 continue;
9152
9153 if (skip == NULL)
9154 {
9155 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9156 if (skip == NULL)
9157 goto error_ret;
9158 }
9159
9160 skip[rel->r_offset >> 3]
9161 |= can_optimize | ((rel - toc_relocs) << 2);
9162 }
9163 }
9164
9165 if (skip == NULL)
9166 continue;
9167
9168 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9169 if (used == NULL)
9170 {
9171 error_ret:
9172 if (local_syms != NULL
9173 && symtab_hdr->contents != (unsigned char *) local_syms)
9174 free (local_syms);
9175 if (sec != NULL
9176 && relstart != NULL
9177 && elf_section_data (sec)->relocs != relstart)
9178 free (relstart);
9179 if (toc_relocs != NULL
9180 && elf_section_data (toc)->relocs != toc_relocs)
9181 free (toc_relocs);
9182 if (skip != NULL)
9183 free (skip);
9184 return FALSE;
9185 }
9186
9187 /* Now check all kept sections that might reference the toc.
9188 Check the toc itself last. */
9189 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9190 : ibfd->sections);
9191 sec != NULL;
9192 sec = (sec == toc ? NULL
9193 : sec->next == NULL ? toc
9194 : sec->next == toc && toc->next ? toc->next
9195 : sec->next))
9196 {
9197 int repeat;
9198
9199 if (sec->reloc_count == 0
9200 || discarded_section (sec)
9201 || get_opd_info (sec)
9202 || (sec->flags & SEC_ALLOC) == 0
9203 || (sec->flags & SEC_DEBUGGING) != 0)
9204 continue;
9205
9206 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9207 info->keep_memory);
9208 if (relstart == NULL)
9209 {
9210 free (used);
9211 goto error_ret;
9212 }
9213
9214 /* Mark toc entries referenced as used. */
9215 do
9216 {
9217 repeat = 0;
9218 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9219 {
9220 enum elf_ppc64_reloc_type r_type;
9221 unsigned long r_symndx;
9222 asection *sym_sec;
9223 struct elf_link_hash_entry *h;
9224 Elf_Internal_Sym *sym;
9225 bfd_vma val;
9226 enum {no_check, check_lo, check_ha} insn_check;
9227
9228 r_type = ELF64_R_TYPE (rel->r_info);
9229 switch (r_type)
9230 {
9231 default:
9232 insn_check = no_check;
9233 break;
9234
9235 case R_PPC64_GOT_TLSLD16_HA:
9236 case R_PPC64_GOT_TLSGD16_HA:
9237 case R_PPC64_GOT_TPREL16_HA:
9238 case R_PPC64_GOT_DTPREL16_HA:
9239 case R_PPC64_GOT16_HA:
9240 case R_PPC64_TOC16_HA:
9241 insn_check = check_ha;
9242 break;
9243
9244 case R_PPC64_GOT_TLSLD16_LO:
9245 case R_PPC64_GOT_TLSGD16_LO:
9246 case R_PPC64_GOT_TPREL16_LO_DS:
9247 case R_PPC64_GOT_DTPREL16_LO_DS:
9248 case R_PPC64_GOT16_LO:
9249 case R_PPC64_GOT16_LO_DS:
9250 case R_PPC64_TOC16_LO:
9251 case R_PPC64_TOC16_LO_DS:
9252 insn_check = check_lo;
9253 break;
9254 }
9255
9256 if (insn_check != no_check)
9257 {
9258 bfd_vma off = rel->r_offset & ~3;
9259 unsigned char buf[4];
9260 unsigned int insn;
9261
9262 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9263 {
9264 free (used);
9265 goto error_ret;
9266 }
9267 insn = bfd_get_32 (ibfd, buf);
9268 if (insn_check == check_lo
9269 ? !ok_lo_toc_insn (insn, r_type)
9270 : ((insn & ((0x3f << 26) | 0x1f << 16))
9271 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9272 {
9273 char str[12];
9274
9275 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9276 sprintf (str, "%#08x", insn);
9277 info->callbacks->einfo
9278 /* xgettext:c-format */
9279 (_("%H: toc optimization is not supported for"
9280 " %s instruction.\n"),
9281 ibfd, sec, rel->r_offset & ~3, str);
9282 }
9283 }
9284
9285 switch (r_type)
9286 {
9287 case R_PPC64_TOC16:
9288 case R_PPC64_TOC16_LO:
9289 case R_PPC64_TOC16_HI:
9290 case R_PPC64_TOC16_HA:
9291 case R_PPC64_TOC16_DS:
9292 case R_PPC64_TOC16_LO_DS:
9293 /* In case we're taking addresses of toc entries. */
9294 case R_PPC64_ADDR64:
9295 break;
9296
9297 default:
9298 continue;
9299 }
9300
9301 r_symndx = ELF64_R_SYM (rel->r_info);
9302 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9303 r_symndx, ibfd))
9304 {
9305 free (used);
9306 goto error_ret;
9307 }
9308
9309 if (sym_sec != toc)
9310 continue;
9311
9312 if (h != NULL)
9313 val = h->root.u.def.value;
9314 else
9315 val = sym->st_value;
9316 val += rel->r_addend;
9317
9318 if (val >= toc->size)
9319 continue;
9320
9321 if ((skip[val >> 3] & can_optimize) != 0)
9322 {
9323 bfd_vma off;
9324 unsigned char opc;
9325
9326 switch (r_type)
9327 {
9328 case R_PPC64_TOC16_HA:
9329 break;
9330
9331 case R_PPC64_TOC16_LO_DS:
9332 off = rel->r_offset;
9333 off += (bfd_big_endian (ibfd) ? -2 : 3);
9334 if (!bfd_get_section_contents (ibfd, sec, &opc,
9335 off, 1))
9336 {
9337 free (used);
9338 goto error_ret;
9339 }
9340 if ((opc & (0x3f << 2)) == (58u << 2))
9341 break;
9342 /* Fall through. */
9343
9344 default:
9345 /* Wrong sort of reloc, or not a ld. We may
9346 as well clear ref_from_discarded too. */
9347 skip[val >> 3] = 0;
9348 }
9349 }
9350
9351 if (sec != toc)
9352 used[val >> 3] = 1;
9353 /* For the toc section, we only mark as used if this
9354 entry itself isn't unused. */
9355 else if ((used[rel->r_offset >> 3]
9356 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9357 && !used[val >> 3])
9358 {
9359 /* Do all the relocs again, to catch reference
9360 chains. */
9361 repeat = 1;
9362 used[val >> 3] = 1;
9363 }
9364 }
9365 }
9366 while (repeat);
9367
9368 if (elf_section_data (sec)->relocs != relstart)
9369 free (relstart);
9370 }
9371
9372 /* Merge the used and skip arrays. Assume that TOC
9373 doublewords not appearing as either used or unused belong
9374 to to an entry more than one doubleword in size. */
9375 for (drop = skip, keep = used, last = 0, some_unused = 0;
9376 drop < skip + (toc->size + 7) / 8;
9377 ++drop, ++keep)
9378 {
9379 if (*keep)
9380 {
9381 *drop &= ~ref_from_discarded;
9382 if ((*drop & can_optimize) != 0)
9383 some_unused = 1;
9384 last = 0;
9385 }
9386 else if ((*drop & ref_from_discarded) != 0)
9387 {
9388 some_unused = 1;
9389 last = ref_from_discarded;
9390 }
9391 else
9392 *drop = last;
9393 }
9394
9395 free (used);
9396
9397 if (some_unused)
9398 {
9399 bfd_byte *contents, *src;
9400 unsigned long off;
9401 Elf_Internal_Sym *sym;
9402 bfd_boolean local_toc_syms = FALSE;
9403
9404 /* Shuffle the toc contents, and at the same time convert the
9405 skip array from booleans into offsets. */
9406 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9407 goto error_ret;
9408
9409 elf_section_data (toc)->this_hdr.contents = contents;
9410
9411 for (src = contents, off = 0, drop = skip;
9412 src < contents + toc->size;
9413 src += 8, ++drop)
9414 {
9415 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9416 off += 8;
9417 else if (off != 0)
9418 {
9419 *drop = off;
9420 memcpy (src - off, src, 8);
9421 }
9422 }
9423 *drop = off;
9424 toc->rawsize = toc->size;
9425 toc->size = src - contents - off;
9426
9427 /* Adjust addends for relocs against the toc section sym,
9428 and optimize any accesses we can. */
9429 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9430 {
9431 if (sec->reloc_count == 0
9432 || discarded_section (sec))
9433 continue;
9434
9435 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9436 info->keep_memory);
9437 if (relstart == NULL)
9438 goto error_ret;
9439
9440 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9441 {
9442 enum elf_ppc64_reloc_type r_type;
9443 unsigned long r_symndx;
9444 asection *sym_sec;
9445 struct elf_link_hash_entry *h;
9446 bfd_vma val;
9447
9448 r_type = ELF64_R_TYPE (rel->r_info);
9449 switch (r_type)
9450 {
9451 default:
9452 continue;
9453
9454 case R_PPC64_TOC16:
9455 case R_PPC64_TOC16_LO:
9456 case R_PPC64_TOC16_HI:
9457 case R_PPC64_TOC16_HA:
9458 case R_PPC64_TOC16_DS:
9459 case R_PPC64_TOC16_LO_DS:
9460 case R_PPC64_ADDR64:
9461 break;
9462 }
9463
9464 r_symndx = ELF64_R_SYM (rel->r_info);
9465 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9466 r_symndx, ibfd))
9467 goto error_ret;
9468
9469 if (sym_sec != toc)
9470 continue;
9471
9472 if (h != NULL)
9473 val = h->root.u.def.value;
9474 else
9475 {
9476 val = sym->st_value;
9477 if (val != 0)
9478 local_toc_syms = TRUE;
9479 }
9480
9481 val += rel->r_addend;
9482
9483 if (val > toc->rawsize)
9484 val = toc->rawsize;
9485 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9486 continue;
9487 else if ((skip[val >> 3] & can_optimize) != 0)
9488 {
9489 Elf_Internal_Rela *tocrel
9490 = toc_relocs + (skip[val >> 3] >> 2);
9491 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9492
9493 switch (r_type)
9494 {
9495 case R_PPC64_TOC16_HA:
9496 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9497 break;
9498
9499 case R_PPC64_TOC16_LO_DS:
9500 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9501 break;
9502
9503 default:
9504 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9505 ppc_howto_init ();
9506 info->callbacks->einfo
9507 /* xgettext:c-format */
9508 (_("%H: %s references "
9509 "optimized away TOC entry\n"),
9510 ibfd, sec, rel->r_offset,
9511 ppc64_elf_howto_table[r_type]->name);
9512 bfd_set_error (bfd_error_bad_value);
9513 goto error_ret;
9514 }
9515 rel->r_addend = tocrel->r_addend;
9516 elf_section_data (sec)->relocs = relstart;
9517 continue;
9518 }
9519
9520 if (h != NULL || sym->st_value != 0)
9521 continue;
9522
9523 rel->r_addend -= skip[val >> 3];
9524 elf_section_data (sec)->relocs = relstart;
9525 }
9526
9527 if (elf_section_data (sec)->relocs != relstart)
9528 free (relstart);
9529 }
9530
9531 /* We shouldn't have local or global symbols defined in the TOC,
9532 but handle them anyway. */
9533 if (local_syms != NULL)
9534 for (sym = local_syms;
9535 sym < local_syms + symtab_hdr->sh_info;
9536 ++sym)
9537 if (sym->st_value != 0
9538 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9539 {
9540 unsigned long i;
9541
9542 if (sym->st_value > toc->rawsize)
9543 i = toc->rawsize >> 3;
9544 else
9545 i = sym->st_value >> 3;
9546
9547 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9548 {
9549 if (local_toc_syms)
9550 _bfd_error_handler
9551 (_("%s defined on removed toc entry"),
9552 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9553 do
9554 ++i;
9555 while ((skip[i] & (ref_from_discarded | can_optimize)));
9556 sym->st_value = (bfd_vma) i << 3;
9557 }
9558
9559 sym->st_value -= skip[i];
9560 symtab_hdr->contents = (unsigned char *) local_syms;
9561 }
9562
9563 /* Adjust any global syms defined in this toc input section. */
9564 if (toc_inf.global_toc_syms)
9565 {
9566 toc_inf.toc = toc;
9567 toc_inf.skip = skip;
9568 toc_inf.global_toc_syms = FALSE;
9569 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9570 &toc_inf);
9571 }
9572
9573 if (toc->reloc_count != 0)
9574 {
9575 Elf_Internal_Shdr *rel_hdr;
9576 Elf_Internal_Rela *wrel;
9577 bfd_size_type sz;
9578
9579 /* Remove unused toc relocs, and adjust those we keep. */
9580 if (toc_relocs == NULL)
9581 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9582 info->keep_memory);
9583 if (toc_relocs == NULL)
9584 goto error_ret;
9585
9586 wrel = toc_relocs;
9587 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9588 if ((skip[rel->r_offset >> 3]
9589 & (ref_from_discarded | can_optimize)) == 0)
9590 {
9591 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9592 wrel->r_info = rel->r_info;
9593 wrel->r_addend = rel->r_addend;
9594 ++wrel;
9595 }
9596 else if (!dec_dynrel_count (rel->r_info, toc, info,
9597 &local_syms, NULL, NULL))
9598 goto error_ret;
9599
9600 elf_section_data (toc)->relocs = toc_relocs;
9601 toc->reloc_count = wrel - toc_relocs;
9602 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9603 sz = rel_hdr->sh_entsize;
9604 rel_hdr->sh_size = toc->reloc_count * sz;
9605 }
9606 }
9607 else if (toc_relocs != NULL
9608 && elf_section_data (toc)->relocs != toc_relocs)
9609 free (toc_relocs);
9610
9611 if (local_syms != NULL
9612 && symtab_hdr->contents != (unsigned char *) local_syms)
9613 {
9614 if (!info->keep_memory)
9615 free (local_syms);
9616 else
9617 symtab_hdr->contents = (unsigned char *) local_syms;
9618 }
9619 free (skip);
9620 }
9621
9622 return TRUE;
9623 }
9624
9625 /* Return true iff input section I references the TOC using
9626 instructions limited to +/-32k offsets. */
9627
9628 bfd_boolean
9629 ppc64_elf_has_small_toc_reloc (asection *i)
9630 {
9631 return (is_ppc64_elf (i->owner)
9632 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9633 }
9634
9635 /* Allocate space for one GOT entry. */
9636
9637 static void
9638 allocate_got (struct elf_link_hash_entry *h,
9639 struct bfd_link_info *info,
9640 struct got_entry *gent)
9641 {
9642 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9643 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9644 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9645 ? 16 : 8);
9646 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9647 ? 2 : 1) * sizeof (Elf64_External_Rela);
9648 asection *got = ppc64_elf_tdata (gent->owner)->got;
9649
9650 gent->got.offset = got->size;
9651 got->size += entsize;
9652
9653 if (h->type == STT_GNU_IFUNC)
9654 {
9655 htab->elf.irelplt->size += rentsize;
9656 htab->got_reli_size += rentsize;
9657 }
9658 else if ((bfd_link_pic (info)
9659 || (htab->elf.dynamic_sections_created
9660 && h->dynindx != -1
9661 && !SYMBOL_REFERENCES_LOCAL (info, h)))
9662 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9663 || h->root.type != bfd_link_hash_undefweak))
9664 {
9665 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9666 relgot->size += rentsize;
9667 }
9668 }
9669
9670 /* This function merges got entries in the same toc group. */
9671
9672 static void
9673 merge_got_entries (struct got_entry **pent)
9674 {
9675 struct got_entry *ent, *ent2;
9676
9677 for (ent = *pent; ent != NULL; ent = ent->next)
9678 if (!ent->is_indirect)
9679 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9680 if (!ent2->is_indirect
9681 && ent2->addend == ent->addend
9682 && ent2->tls_type == ent->tls_type
9683 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9684 {
9685 ent2->is_indirect = TRUE;
9686 ent2->got.ent = ent;
9687 }
9688 }
9689
9690 /* If H is undefined weak, make it dynamic if that makes sense. */
9691
9692 static bfd_boolean
9693 ensure_undefweak_dynamic (struct bfd_link_info *info,
9694 struct elf_link_hash_entry *h)
9695 {
9696 struct elf_link_hash_table *htab = elf_hash_table (info);
9697
9698 if (htab->dynamic_sections_created
9699 && info->dynamic_undefined_weak != 0
9700 && h->root.type == bfd_link_hash_undefweak
9701 && h->dynindx == -1
9702 && !h->forced_local
9703 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
9704 return bfd_elf_link_record_dynamic_symbol (info, h);
9705 return TRUE;
9706 }
9707
9708 /* Allocate space in .plt, .got and associated reloc sections for
9709 dynamic relocs. */
9710
9711 static bfd_boolean
9712 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9713 {
9714 struct bfd_link_info *info;
9715 struct ppc_link_hash_table *htab;
9716 asection *s;
9717 struct ppc_link_hash_entry *eh;
9718 struct got_entry **pgent, *gent;
9719
9720 if (h->root.type == bfd_link_hash_indirect)
9721 return TRUE;
9722
9723 info = (struct bfd_link_info *) inf;
9724 htab = ppc_hash_table (info);
9725 if (htab == NULL)
9726 return FALSE;
9727
9728 eh = (struct ppc_link_hash_entry *) h;
9729 /* Run through the TLS GD got entries first if we're changing them
9730 to TPREL. */
9731 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9732 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9733 if (gent->got.refcount > 0
9734 && (gent->tls_type & TLS_GD) != 0)
9735 {
9736 /* This was a GD entry that has been converted to TPREL. If
9737 there happens to be a TPREL entry we can use that one. */
9738 struct got_entry *ent;
9739 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9740 if (ent->got.refcount > 0
9741 && (ent->tls_type & TLS_TPREL) != 0
9742 && ent->addend == gent->addend
9743 && ent->owner == gent->owner)
9744 {
9745 gent->got.refcount = 0;
9746 break;
9747 }
9748
9749 /* If not, then we'll be using our own TPREL entry. */
9750 if (gent->got.refcount != 0)
9751 gent->tls_type = TLS_TLS | TLS_TPREL;
9752 }
9753
9754 /* Remove any list entry that won't generate a word in the GOT before
9755 we call merge_got_entries. Otherwise we risk merging to empty
9756 entries. */
9757 pgent = &h->got.glist;
9758 while ((gent = *pgent) != NULL)
9759 if (gent->got.refcount > 0)
9760 {
9761 if ((gent->tls_type & TLS_LD) != 0
9762 && !h->def_dynamic)
9763 {
9764 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9765 *pgent = gent->next;
9766 }
9767 else
9768 pgent = &gent->next;
9769 }
9770 else
9771 *pgent = gent->next;
9772
9773 if (!htab->do_multi_toc)
9774 merge_got_entries (&h->got.glist);
9775
9776 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9777 if (!gent->is_indirect)
9778 {
9779 /* Make sure this symbol is output as a dynamic symbol.
9780 Undefined weak syms won't yet be marked as dynamic. */
9781 if (!ensure_undefweak_dynamic (info, h))
9782 return FALSE;
9783
9784 if (!is_ppc64_elf (gent->owner))
9785 abort ();
9786
9787 allocate_got (h, info, gent);
9788 }
9789
9790 /* If no dynamic sections we can't have dynamic relocs, except for
9791 IFUNCs which are handled even in static executables. */
9792 if (!htab->elf.dynamic_sections_created
9793 && h->type != STT_GNU_IFUNC)
9794 eh->dyn_relocs = NULL;
9795
9796 /* Also discard relocs on undefined weak syms with non-default
9797 visibility, or when dynamic_undefined_weak says so. */
9798 else if (h->root.type == bfd_link_hash_undefweak
9799 && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
9800 || info->dynamic_undefined_weak == 0))
9801 eh->dyn_relocs = NULL;
9802
9803 if (eh->dyn_relocs != NULL)
9804 {
9805 struct elf_dyn_relocs *p, **pp;
9806
9807 /* In the shared -Bsymbolic case, discard space allocated for
9808 dynamic pc-relative relocs against symbols which turn out to
9809 be defined in regular objects. For the normal shared case,
9810 discard space for relocs that have become local due to symbol
9811 visibility changes. */
9812
9813 if (bfd_link_pic (info))
9814 {
9815 /* Relocs that use pc_count are those that appear on a call
9816 insn, or certain REL relocs (see must_be_dyn_reloc) that
9817 can be generated via assembly. We want calls to
9818 protected symbols to resolve directly to the function
9819 rather than going via the plt. If people want function
9820 pointer comparisons to work as expected then they should
9821 avoid writing weird assembly. */
9822 if (SYMBOL_CALLS_LOCAL (info, h))
9823 {
9824 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9825 {
9826 p->count -= p->pc_count;
9827 p->pc_count = 0;
9828 if (p->count == 0)
9829 *pp = p->next;
9830 else
9831 pp = &p->next;
9832 }
9833 }
9834
9835 if (eh->dyn_relocs != NULL)
9836 {
9837 /* Make sure this symbol is output as a dynamic symbol.
9838 Undefined weak syms won't yet be marked as dynamic. */
9839 if (!ensure_undefweak_dynamic (info, h))
9840 return FALSE;
9841 }
9842 }
9843 else if (h->type == STT_GNU_IFUNC)
9844 {
9845 /* A plt entry is always created when making direct calls to
9846 an ifunc, even when building a static executable, but
9847 that doesn't cover all cases. We may have only an ifunc
9848 initialised function pointer for a given ifunc symbol.
9849
9850 For ELFv2, dynamic relocations are not required when
9851 generating a global entry PLT stub. */
9852 if (abiversion (info->output_bfd) >= 2)
9853 {
9854 if (global_entry_stub (h))
9855 eh->dyn_relocs = NULL;
9856 }
9857
9858 /* For ELFv1 we have function descriptors. Descriptors need
9859 to be treated like PLT entries and thus have dynamic
9860 relocations. One exception is when the function
9861 descriptor is copied into .dynbss (which should only
9862 happen with ancient versions of gcc). */
9863 else if (h->needs_copy)
9864 eh->dyn_relocs = NULL;
9865 }
9866 else if (ELIMINATE_COPY_RELOCS)
9867 {
9868 /* For the non-pic case, discard space for relocs against
9869 symbols which turn out to need copy relocs or are not
9870 dynamic. */
9871 if (!h->non_got_ref
9872 && !h->def_regular)
9873 {
9874 /* Make sure this symbol is output as a dynamic symbol.
9875 Undefined weak syms won't yet be marked as dynamic. */
9876 if (!ensure_undefweak_dynamic (info, h))
9877 return FALSE;
9878
9879 if (h->dynindx == -1)
9880 eh->dyn_relocs = NULL;
9881 }
9882 else
9883 eh->dyn_relocs = NULL;
9884 }
9885
9886 /* Finally, allocate space. */
9887 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9888 {
9889 asection *sreloc = elf_section_data (p->sec)->sreloc;
9890 if (eh->elf.type == STT_GNU_IFUNC)
9891 sreloc = htab->elf.irelplt;
9892 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9893 }
9894 }
9895
9896 if ((htab->elf.dynamic_sections_created
9897 && h->dynindx != -1)
9898 || h->type == STT_GNU_IFUNC)
9899 {
9900 struct plt_entry *pent;
9901 bfd_boolean doneone = FALSE;
9902 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9903 if (pent->plt.refcount > 0)
9904 {
9905 if (!htab->elf.dynamic_sections_created
9906 || h->dynindx == -1)
9907 {
9908 s = htab->elf.iplt;
9909 pent->plt.offset = s->size;
9910 s->size += PLT_ENTRY_SIZE (htab);
9911 s = htab->elf.irelplt;
9912 }
9913 else
9914 {
9915 /* If this is the first .plt entry, make room for the special
9916 first entry. */
9917 s = htab->elf.splt;
9918 if (s->size == 0)
9919 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9920
9921 pent->plt.offset = s->size;
9922
9923 /* Make room for this entry. */
9924 s->size += PLT_ENTRY_SIZE (htab);
9925
9926 /* Make room for the .glink code. */
9927 s = htab->glink;
9928 if (s->size == 0)
9929 s->size += GLINK_CALL_STUB_SIZE;
9930 if (htab->opd_abi)
9931 {
9932 /* We need bigger stubs past index 32767. */
9933 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9934 s->size += 4;
9935 s->size += 2*4;
9936 }
9937 else
9938 s->size += 4;
9939
9940 /* We also need to make an entry in the .rela.plt section. */
9941 s = htab->elf.srelplt;
9942 }
9943 s->size += sizeof (Elf64_External_Rela);
9944 doneone = TRUE;
9945 }
9946 else
9947 pent->plt.offset = (bfd_vma) -1;
9948 if (!doneone)
9949 {
9950 h->plt.plist = NULL;
9951 h->needs_plt = 0;
9952 }
9953 }
9954 else
9955 {
9956 h->plt.plist = NULL;
9957 h->needs_plt = 0;
9958 }
9959
9960 return TRUE;
9961 }
9962
9963 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9964 to set up space for global entry stubs. These are put in glink,
9965 after the branch table. */
9966
9967 static bfd_boolean
9968 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9969 {
9970 struct bfd_link_info *info;
9971 struct ppc_link_hash_table *htab;
9972 struct plt_entry *pent;
9973 asection *s;
9974
9975 if (h->root.type == bfd_link_hash_indirect)
9976 return TRUE;
9977
9978 if (!h->pointer_equality_needed)
9979 return TRUE;
9980
9981 if (h->def_regular)
9982 return TRUE;
9983
9984 info = inf;
9985 htab = ppc_hash_table (info);
9986 if (htab == NULL)
9987 return FALSE;
9988
9989 s = htab->glink;
9990 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9991 if (pent->plt.offset != (bfd_vma) -1
9992 && pent->addend == 0)
9993 {
9994 /* For ELFv2, if this symbol is not defined in a regular file
9995 and we are not generating a shared library or pie, then we
9996 need to define the symbol in the executable on a call stub.
9997 This is to avoid text relocations. */
9998 s->size = (s->size + 15) & -16;
9999 h->root.type = bfd_link_hash_defined;
10000 h->root.u.def.section = s;
10001 h->root.u.def.value = s->size;
10002 s->size += 16;
10003 break;
10004 }
10005 return TRUE;
10006 }
10007
10008 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
10009 read-only sections. */
10010
10011 static bfd_boolean
10012 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
10013 {
10014 if (h->root.type == bfd_link_hash_indirect)
10015 return TRUE;
10016
10017 if (readonly_dynrelocs (h))
10018 {
10019 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
10020
10021 /* Not an error, just cut short the traversal. */
10022 return FALSE;
10023 }
10024 return TRUE;
10025 }
10026
10027 /* Set the sizes of the dynamic sections. */
10028
10029 static bfd_boolean
10030 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
10031 struct bfd_link_info *info)
10032 {
10033 struct ppc_link_hash_table *htab;
10034 bfd *dynobj;
10035 asection *s;
10036 bfd_boolean relocs;
10037 bfd *ibfd;
10038 struct got_entry *first_tlsld;
10039
10040 htab = ppc_hash_table (info);
10041 if (htab == NULL)
10042 return FALSE;
10043
10044 dynobj = htab->elf.dynobj;
10045 if (dynobj == NULL)
10046 abort ();
10047
10048 if (htab->elf.dynamic_sections_created)
10049 {
10050 /* Set the contents of the .interp section to the interpreter. */
10051 if (bfd_link_executable (info) && !info->nointerp)
10052 {
10053 s = bfd_get_linker_section (dynobj, ".interp");
10054 if (s == NULL)
10055 abort ();
10056 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10057 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10058 }
10059 }
10060
10061 /* Set up .got offsets for local syms, and space for local dynamic
10062 relocs. */
10063 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10064 {
10065 struct got_entry **lgot_ents;
10066 struct got_entry **end_lgot_ents;
10067 struct plt_entry **local_plt;
10068 struct plt_entry **end_local_plt;
10069 unsigned char *lgot_masks;
10070 bfd_size_type locsymcount;
10071 Elf_Internal_Shdr *symtab_hdr;
10072
10073 if (!is_ppc64_elf (ibfd))
10074 continue;
10075
10076 for (s = ibfd->sections; s != NULL; s = s->next)
10077 {
10078 struct ppc_dyn_relocs *p;
10079
10080 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10081 {
10082 if (!bfd_is_abs_section (p->sec)
10083 && bfd_is_abs_section (p->sec->output_section))
10084 {
10085 /* Input section has been discarded, either because
10086 it is a copy of a linkonce section or due to
10087 linker script /DISCARD/, so we'll be discarding
10088 the relocs too. */
10089 }
10090 else if (p->count != 0)
10091 {
10092 asection *srel = elf_section_data (p->sec)->sreloc;
10093 if (p->ifunc)
10094 srel = htab->elf.irelplt;
10095 srel->size += p->count * sizeof (Elf64_External_Rela);
10096 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10097 info->flags |= DF_TEXTREL;
10098 }
10099 }
10100 }
10101
10102 lgot_ents = elf_local_got_ents (ibfd);
10103 if (!lgot_ents)
10104 continue;
10105
10106 symtab_hdr = &elf_symtab_hdr (ibfd);
10107 locsymcount = symtab_hdr->sh_info;
10108 end_lgot_ents = lgot_ents + locsymcount;
10109 local_plt = (struct plt_entry **) end_lgot_ents;
10110 end_local_plt = local_plt + locsymcount;
10111 lgot_masks = (unsigned char *) end_local_plt;
10112 s = ppc64_elf_tdata (ibfd)->got;
10113 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10114 {
10115 struct got_entry **pent, *ent;
10116
10117 pent = lgot_ents;
10118 while ((ent = *pent) != NULL)
10119 if (ent->got.refcount > 0)
10120 {
10121 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10122 {
10123 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10124 *pent = ent->next;
10125 }
10126 else
10127 {
10128 unsigned int ent_size = 8;
10129 unsigned int rel_size = sizeof (Elf64_External_Rela);
10130
10131 ent->got.offset = s->size;
10132 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10133 {
10134 ent_size *= 2;
10135 rel_size *= 2;
10136 }
10137 s->size += ent_size;
10138 if ((*lgot_masks & PLT_IFUNC) != 0)
10139 {
10140 htab->elf.irelplt->size += rel_size;
10141 htab->got_reli_size += rel_size;
10142 }
10143 else if (bfd_link_pic (info))
10144 {
10145 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10146 srel->size += rel_size;
10147 }
10148 pent = &ent->next;
10149 }
10150 }
10151 else
10152 *pent = ent->next;
10153 }
10154
10155 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10156 for (; local_plt < end_local_plt; ++local_plt)
10157 {
10158 struct plt_entry *ent;
10159
10160 for (ent = *local_plt; ent != NULL; ent = ent->next)
10161 if (ent->plt.refcount > 0)
10162 {
10163 s = htab->elf.iplt;
10164 ent->plt.offset = s->size;
10165 s->size += PLT_ENTRY_SIZE (htab);
10166
10167 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10168 }
10169 else
10170 ent->plt.offset = (bfd_vma) -1;
10171 }
10172 }
10173
10174 /* Allocate global sym .plt and .got entries, and space for global
10175 sym dynamic relocs. */
10176 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10177 /* Stash the end of glink branch table. */
10178 if (htab->glink != NULL)
10179 htab->glink->rawsize = htab->glink->size;
10180
10181 if (!htab->opd_abi && !bfd_link_pic (info))
10182 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10183
10184 first_tlsld = NULL;
10185 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10186 {
10187 struct got_entry *ent;
10188
10189 if (!is_ppc64_elf (ibfd))
10190 continue;
10191
10192 ent = ppc64_tlsld_got (ibfd);
10193 if (ent->got.refcount > 0)
10194 {
10195 if (!htab->do_multi_toc && first_tlsld != NULL)
10196 {
10197 ent->is_indirect = TRUE;
10198 ent->got.ent = first_tlsld;
10199 }
10200 else
10201 {
10202 if (first_tlsld == NULL)
10203 first_tlsld = ent;
10204 s = ppc64_elf_tdata (ibfd)->got;
10205 ent->got.offset = s->size;
10206 ent->owner = ibfd;
10207 s->size += 16;
10208 if (bfd_link_pic (info))
10209 {
10210 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10211 srel->size += sizeof (Elf64_External_Rela);
10212 }
10213 }
10214 }
10215 else
10216 ent->got.offset = (bfd_vma) -1;
10217 }
10218
10219 /* We now have determined the sizes of the various dynamic sections.
10220 Allocate memory for them. */
10221 relocs = FALSE;
10222 for (s = dynobj->sections; s != NULL; s = s->next)
10223 {
10224 if ((s->flags & SEC_LINKER_CREATED) == 0)
10225 continue;
10226
10227 if (s == htab->brlt || s == htab->relbrlt)
10228 /* These haven't been allocated yet; don't strip. */
10229 continue;
10230 else if (s == htab->elf.sgot
10231 || s == htab->elf.splt
10232 || s == htab->elf.iplt
10233 || s == htab->glink
10234 || s == htab->elf.sdynbss
10235 || s == htab->elf.sdynrelro)
10236 {
10237 /* Strip this section if we don't need it; see the
10238 comment below. */
10239 }
10240 else if (s == htab->glink_eh_frame)
10241 {
10242 if (!bfd_is_abs_section (s->output_section))
10243 /* Not sized yet. */
10244 continue;
10245 }
10246 else if (CONST_STRNEQ (s->name, ".rela"))
10247 {
10248 if (s->size != 0)
10249 {
10250 if (s != htab->elf.srelplt)
10251 relocs = TRUE;
10252
10253 /* We use the reloc_count field as a counter if we need
10254 to copy relocs into the output file. */
10255 s->reloc_count = 0;
10256 }
10257 }
10258 else
10259 {
10260 /* It's not one of our sections, so don't allocate space. */
10261 continue;
10262 }
10263
10264 if (s->size == 0)
10265 {
10266 /* If we don't need this section, strip it from the
10267 output file. This is mostly to handle .rela.bss and
10268 .rela.plt. We must create both sections in
10269 create_dynamic_sections, because they must be created
10270 before the linker maps input sections to output
10271 sections. The linker does that before
10272 adjust_dynamic_symbol is called, and it is that
10273 function which decides whether anything needs to go
10274 into these sections. */
10275 s->flags |= SEC_EXCLUDE;
10276 continue;
10277 }
10278
10279 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10280 continue;
10281
10282 /* Allocate memory for the section contents. We use bfd_zalloc
10283 here in case unused entries are not reclaimed before the
10284 section's contents are written out. This should not happen,
10285 but this way if it does we get a R_PPC64_NONE reloc in .rela
10286 sections instead of garbage.
10287 We also rely on the section contents being zero when writing
10288 the GOT and .dynrelro. */
10289 s->contents = bfd_zalloc (dynobj, s->size);
10290 if (s->contents == NULL)
10291 return FALSE;
10292 }
10293
10294 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10295 {
10296 if (!is_ppc64_elf (ibfd))
10297 continue;
10298
10299 s = ppc64_elf_tdata (ibfd)->got;
10300 if (s != NULL && s != htab->elf.sgot)
10301 {
10302 if (s->size == 0)
10303 s->flags |= SEC_EXCLUDE;
10304 else
10305 {
10306 s->contents = bfd_zalloc (ibfd, s->size);
10307 if (s->contents == NULL)
10308 return FALSE;
10309 }
10310 }
10311 s = ppc64_elf_tdata (ibfd)->relgot;
10312 if (s != NULL)
10313 {
10314 if (s->size == 0)
10315 s->flags |= SEC_EXCLUDE;
10316 else
10317 {
10318 s->contents = bfd_zalloc (ibfd, s->size);
10319 if (s->contents == NULL)
10320 return FALSE;
10321 relocs = TRUE;
10322 s->reloc_count = 0;
10323 }
10324 }
10325 }
10326
10327 if (htab->elf.dynamic_sections_created)
10328 {
10329 bfd_boolean tls_opt;
10330
10331 /* Add some entries to the .dynamic section. We fill in the
10332 values later, in ppc64_elf_finish_dynamic_sections, but we
10333 must add the entries now so that we get the correct size for
10334 the .dynamic section. The DT_DEBUG entry is filled in by the
10335 dynamic linker and used by the debugger. */
10336 #define add_dynamic_entry(TAG, VAL) \
10337 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10338
10339 if (bfd_link_executable (info))
10340 {
10341 if (!add_dynamic_entry (DT_DEBUG, 0))
10342 return FALSE;
10343 }
10344
10345 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10346 {
10347 if (!add_dynamic_entry (DT_PLTGOT, 0)
10348 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10349 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10350 || !add_dynamic_entry (DT_JMPREL, 0)
10351 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10352 return FALSE;
10353 }
10354
10355 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10356 {
10357 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10358 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10359 return FALSE;
10360 }
10361
10362 tls_opt = (htab->params->tls_get_addr_opt
10363 && htab->tls_get_addr_fd != NULL
10364 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10365 if (tls_opt || !htab->opd_abi)
10366 {
10367 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10368 return FALSE;
10369 }
10370
10371 if (relocs)
10372 {
10373 if (!add_dynamic_entry (DT_RELA, 0)
10374 || !add_dynamic_entry (DT_RELASZ, 0)
10375 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10376 return FALSE;
10377
10378 /* If any dynamic relocs apply to a read-only section,
10379 then we need a DT_TEXTREL entry. */
10380 if ((info->flags & DF_TEXTREL) == 0)
10381 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10382
10383 if ((info->flags & DF_TEXTREL) != 0)
10384 {
10385 if (!add_dynamic_entry (DT_TEXTREL, 0))
10386 return FALSE;
10387 }
10388 }
10389 }
10390 #undef add_dynamic_entry
10391
10392 return TRUE;
10393 }
10394
10395 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10396
10397 static bfd_boolean
10398 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10399 {
10400 if (h->plt.plist != NULL
10401 && !h->def_regular
10402 && !h->pointer_equality_needed)
10403 return FALSE;
10404
10405 return _bfd_elf_hash_symbol (h);
10406 }
10407
10408 /* Determine the type of stub needed, if any, for a call. */
10409
10410 static inline enum ppc_stub_type
10411 ppc_type_of_stub (asection *input_sec,
10412 const Elf_Internal_Rela *rel,
10413 struct ppc_link_hash_entry **hash,
10414 struct plt_entry **plt_ent,
10415 bfd_vma destination,
10416 unsigned long local_off)
10417 {
10418 struct ppc_link_hash_entry *h = *hash;
10419 bfd_vma location;
10420 bfd_vma branch_offset;
10421 bfd_vma max_branch_offset;
10422 enum elf_ppc64_reloc_type r_type;
10423
10424 if (h != NULL)
10425 {
10426 struct plt_entry *ent;
10427 struct ppc_link_hash_entry *fdh = h;
10428 if (h->oh != NULL
10429 && h->oh->is_func_descriptor)
10430 {
10431 fdh = ppc_follow_link (h->oh);
10432 *hash = fdh;
10433 }
10434
10435 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10436 if (ent->addend == rel->r_addend
10437 && ent->plt.offset != (bfd_vma) -1)
10438 {
10439 *plt_ent = ent;
10440 return ppc_stub_plt_call;
10441 }
10442
10443 /* Here, we know we don't have a plt entry. If we don't have a
10444 either a defined function descriptor or a defined entry symbol
10445 in a regular object file, then it is pointless trying to make
10446 any other type of stub. */
10447 if (!is_static_defined (&fdh->elf)
10448 && !is_static_defined (&h->elf))
10449 return ppc_stub_none;
10450 }
10451 else if (elf_local_got_ents (input_sec->owner) != NULL)
10452 {
10453 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10454 struct plt_entry **local_plt = (struct plt_entry **)
10455 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10456 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10457
10458 if (local_plt[r_symndx] != NULL)
10459 {
10460 struct plt_entry *ent;
10461
10462 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10463 if (ent->addend == rel->r_addend
10464 && ent->plt.offset != (bfd_vma) -1)
10465 {
10466 *plt_ent = ent;
10467 return ppc_stub_plt_call;
10468 }
10469 }
10470 }
10471
10472 /* Determine where the call point is. */
10473 location = (input_sec->output_offset
10474 + input_sec->output_section->vma
10475 + rel->r_offset);
10476
10477 branch_offset = destination - location;
10478 r_type = ELF64_R_TYPE (rel->r_info);
10479
10480 /* Determine if a long branch stub is needed. */
10481 max_branch_offset = 1 << 25;
10482 if (r_type != R_PPC64_REL24)
10483 max_branch_offset = 1 << 15;
10484
10485 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10486 /* We need a stub. Figure out whether a long_branch or plt_branch
10487 is needed later. */
10488 return ppc_stub_long_branch;
10489
10490 return ppc_stub_none;
10491 }
10492
10493 /* With power7 weakly ordered memory model, it is possible for ld.so
10494 to update a plt entry in one thread and have another thread see a
10495 stale zero toc entry. To avoid this we need some sort of acquire
10496 barrier in the call stub. One solution is to make the load of the
10497 toc word seem to appear to depend on the load of the function entry
10498 word. Another solution is to test for r2 being zero, and branch to
10499 the appropriate glink entry if so.
10500
10501 . fake dep barrier compare
10502 . ld 12,xxx(2) ld 12,xxx(2)
10503 . mtctr 12 mtctr 12
10504 . xor 11,12,12 ld 2,xxx+8(2)
10505 . add 2,2,11 cmpldi 2,0
10506 . ld 2,xxx+8(2) bnectr+
10507 . bctr b <glink_entry>
10508
10509 The solution involving the compare turns out to be faster, so
10510 that's what we use unless the branch won't reach. */
10511
10512 #define ALWAYS_USE_FAKE_DEP 0
10513 #define ALWAYS_EMIT_R2SAVE 0
10514
10515 #define PPC_LO(v) ((v) & 0xffff)
10516 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10517 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10518
10519 static inline unsigned int
10520 plt_stub_size (struct ppc_link_hash_table *htab,
10521 struct ppc_stub_hash_entry *stub_entry,
10522 bfd_vma off)
10523 {
10524 unsigned size = 12;
10525
10526 if (ALWAYS_EMIT_R2SAVE
10527 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10528 size += 4;
10529 if (PPC_HA (off) != 0)
10530 size += 4;
10531 if (htab->opd_abi)
10532 {
10533 size += 4;
10534 if (htab->params->plt_static_chain)
10535 size += 4;
10536 if (htab->params->plt_thread_safe
10537 && htab->elf.dynamic_sections_created
10538 && stub_entry->h != NULL
10539 && stub_entry->h->elf.dynindx != -1)
10540 size += 8;
10541 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10542 size += 4;
10543 }
10544 if (stub_entry->h != NULL
10545 && (stub_entry->h == htab->tls_get_addr_fd
10546 || stub_entry->h == htab->tls_get_addr)
10547 && htab->params->tls_get_addr_opt)
10548 size += 13 * 4;
10549 return size;
10550 }
10551
10552 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10553 then return the padding needed to do so. */
10554 static inline unsigned int
10555 plt_stub_pad (struct ppc_link_hash_table *htab,
10556 struct ppc_stub_hash_entry *stub_entry,
10557 bfd_vma plt_off)
10558 {
10559 int stub_align = 1 << htab->params->plt_stub_align;
10560 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10561 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10562
10563 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10564 > ((stub_size - 1) & -stub_align))
10565 return stub_align - (stub_off & (stub_align - 1));
10566 return 0;
10567 }
10568
10569 /* Build a .plt call stub. */
10570
10571 static inline bfd_byte *
10572 build_plt_stub (struct ppc_link_hash_table *htab,
10573 struct ppc_stub_hash_entry *stub_entry,
10574 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10575 {
10576 bfd *obfd = htab->params->stub_bfd;
10577 bfd_boolean plt_load_toc = htab->opd_abi;
10578 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10579 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10580 && htab->elf.dynamic_sections_created
10581 && stub_entry->h != NULL
10582 && stub_entry->h->elf.dynindx != -1);
10583 bfd_boolean use_fake_dep = plt_thread_safe;
10584 bfd_vma cmp_branch_off = 0;
10585
10586 if (!ALWAYS_USE_FAKE_DEP
10587 && plt_load_toc
10588 && plt_thread_safe
10589 && !((stub_entry->h == htab->tls_get_addr_fd
10590 || stub_entry->h == htab->tls_get_addr)
10591 && htab->params->tls_get_addr_opt))
10592 {
10593 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10594 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10595 / PLT_ENTRY_SIZE (htab));
10596 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10597 bfd_vma to, from;
10598
10599 if (pltindex > 32768)
10600 glinkoff += (pltindex - 32768) * 4;
10601 to = (glinkoff
10602 + htab->glink->output_offset
10603 + htab->glink->output_section->vma);
10604 from = (p - stub_entry->group->stub_sec->contents
10605 + 4 * (ALWAYS_EMIT_R2SAVE
10606 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10607 + 4 * (PPC_HA (offset) != 0)
10608 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10609 != PPC_HA (offset))
10610 + 4 * (plt_static_chain != 0)
10611 + 20
10612 + stub_entry->group->stub_sec->output_offset
10613 + stub_entry->group->stub_sec->output_section->vma);
10614 cmp_branch_off = to - from;
10615 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10616 }
10617
10618 if (PPC_HA (offset) != 0)
10619 {
10620 if (r != NULL)
10621 {
10622 if (ALWAYS_EMIT_R2SAVE
10623 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10624 r[0].r_offset += 4;
10625 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10626 r[1].r_offset = r[0].r_offset + 4;
10627 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10628 r[1].r_addend = r[0].r_addend;
10629 if (plt_load_toc)
10630 {
10631 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10632 {
10633 r[2].r_offset = r[1].r_offset + 4;
10634 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10635 r[2].r_addend = r[0].r_addend;
10636 }
10637 else
10638 {
10639 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10640 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10641 r[2].r_addend = r[0].r_addend + 8;
10642 if (plt_static_chain)
10643 {
10644 r[3].r_offset = r[2].r_offset + 4;
10645 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10646 r[3].r_addend = r[0].r_addend + 16;
10647 }
10648 }
10649 }
10650 }
10651 if (ALWAYS_EMIT_R2SAVE
10652 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10653 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10654 if (plt_load_toc)
10655 {
10656 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10657 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10658 }
10659 else
10660 {
10661 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10662 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10663 }
10664 if (plt_load_toc
10665 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10666 {
10667 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10668 offset = 0;
10669 }
10670 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10671 if (plt_load_toc)
10672 {
10673 if (use_fake_dep)
10674 {
10675 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10676 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10677 }
10678 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10679 if (plt_static_chain)
10680 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10681 }
10682 }
10683 else
10684 {
10685 if (r != NULL)
10686 {
10687 if (ALWAYS_EMIT_R2SAVE
10688 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10689 r[0].r_offset += 4;
10690 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10691 if (plt_load_toc)
10692 {
10693 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10694 {
10695 r[1].r_offset = r[0].r_offset + 4;
10696 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10697 r[1].r_addend = r[0].r_addend;
10698 }
10699 else
10700 {
10701 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10702 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10703 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10704 if (plt_static_chain)
10705 {
10706 r[2].r_offset = r[1].r_offset + 4;
10707 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10708 r[2].r_addend = r[0].r_addend + 8;
10709 }
10710 }
10711 }
10712 }
10713 if (ALWAYS_EMIT_R2SAVE
10714 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10715 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10716 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10717 if (plt_load_toc
10718 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10719 {
10720 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10721 offset = 0;
10722 }
10723 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10724 if (plt_load_toc)
10725 {
10726 if (use_fake_dep)
10727 {
10728 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10729 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10730 }
10731 if (plt_static_chain)
10732 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10733 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10734 }
10735 }
10736 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10737 {
10738 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10739 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10740 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10741 }
10742 else
10743 bfd_put_32 (obfd, BCTR, p), p += 4;
10744 return p;
10745 }
10746
10747 /* Build a special .plt call stub for __tls_get_addr. */
10748
10749 #define LD_R11_0R3 0xe9630000
10750 #define LD_R12_0R3 0xe9830000
10751 #define MR_R0_R3 0x7c601b78
10752 #define CMPDI_R11_0 0x2c2b0000
10753 #define ADD_R3_R12_R13 0x7c6c6a14
10754 #define BEQLR 0x4d820020
10755 #define MR_R3_R0 0x7c030378
10756 #define STD_R11_0R1 0xf9610000
10757 #define BCTRL 0x4e800421
10758 #define LD_R11_0R1 0xe9610000
10759 #define MTLR_R11 0x7d6803a6
10760
10761 static inline bfd_byte *
10762 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10763 struct ppc_stub_hash_entry *stub_entry,
10764 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10765 {
10766 bfd *obfd = htab->params->stub_bfd;
10767
10768 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10769 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10770 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10771 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10772 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10773 bfd_put_32 (obfd, BEQLR, p), p += 4;
10774 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10775 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10776 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10777
10778 if (r != NULL)
10779 r[0].r_offset += 9 * 4;
10780 p = build_plt_stub (htab, stub_entry, p, offset, r);
10781 bfd_put_32 (obfd, BCTRL, p - 4);
10782
10783 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10784 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10785 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10786 bfd_put_32 (obfd, BLR, p), p += 4;
10787
10788 return p;
10789 }
10790
10791 static Elf_Internal_Rela *
10792 get_relocs (asection *sec, int count)
10793 {
10794 Elf_Internal_Rela *relocs;
10795 struct bfd_elf_section_data *elfsec_data;
10796
10797 elfsec_data = elf_section_data (sec);
10798 relocs = elfsec_data->relocs;
10799 if (relocs == NULL)
10800 {
10801 bfd_size_type relsize;
10802 relsize = sec->reloc_count * sizeof (*relocs);
10803 relocs = bfd_alloc (sec->owner, relsize);
10804 if (relocs == NULL)
10805 return NULL;
10806 elfsec_data->relocs = relocs;
10807 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10808 sizeof (Elf_Internal_Shdr));
10809 if (elfsec_data->rela.hdr == NULL)
10810 return NULL;
10811 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10812 * sizeof (Elf64_External_Rela));
10813 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10814 sec->reloc_count = 0;
10815 }
10816 relocs += sec->reloc_count;
10817 sec->reloc_count += count;
10818 return relocs;
10819 }
10820
10821 static bfd_vma
10822 get_r2off (struct bfd_link_info *info,
10823 struct ppc_stub_hash_entry *stub_entry)
10824 {
10825 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10826 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10827
10828 if (r2off == 0)
10829 {
10830 /* Support linking -R objects. Get the toc pointer from the
10831 opd entry. */
10832 char buf[8];
10833 if (!htab->opd_abi)
10834 return r2off;
10835 asection *opd = stub_entry->h->elf.root.u.def.section;
10836 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10837
10838 if (strcmp (opd->name, ".opd") != 0
10839 || opd->reloc_count != 0)
10840 {
10841 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10842 stub_entry->h->elf.root.root.string);
10843 bfd_set_error (bfd_error_bad_value);
10844 return (bfd_vma) -1;
10845 }
10846 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10847 return (bfd_vma) -1;
10848 r2off = bfd_get_64 (opd->owner, buf);
10849 r2off -= elf_gp (info->output_bfd);
10850 }
10851 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10852 return r2off;
10853 }
10854
10855 static bfd_boolean
10856 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10857 {
10858 struct ppc_stub_hash_entry *stub_entry;
10859 struct ppc_branch_hash_entry *br_entry;
10860 struct bfd_link_info *info;
10861 struct ppc_link_hash_table *htab;
10862 bfd_byte *loc;
10863 bfd_byte *p;
10864 bfd_vma dest, off;
10865 int size;
10866 Elf_Internal_Rela *r;
10867 asection *plt;
10868
10869 /* Massage our args to the form they really have. */
10870 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10871 info = in_arg;
10872
10873 htab = ppc_hash_table (info);
10874 if (htab == NULL)
10875 return FALSE;
10876
10877 /* Make a note of the offset within the stubs for this entry. */
10878 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10879 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10880
10881 htab->stub_count[stub_entry->stub_type - 1] += 1;
10882 switch (stub_entry->stub_type)
10883 {
10884 case ppc_stub_long_branch:
10885 case ppc_stub_long_branch_r2off:
10886 /* Branches are relative. This is where we are going to. */
10887 dest = (stub_entry->target_value
10888 + stub_entry->target_section->output_offset
10889 + stub_entry->target_section->output_section->vma);
10890 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10891 off = dest;
10892
10893 /* And this is where we are coming from. */
10894 off -= (stub_entry->stub_offset
10895 + stub_entry->group->stub_sec->output_offset
10896 + stub_entry->group->stub_sec->output_section->vma);
10897
10898 size = 4;
10899 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10900 {
10901 bfd_vma r2off = get_r2off (info, stub_entry);
10902
10903 if (r2off == (bfd_vma) -1)
10904 {
10905 htab->stub_error = TRUE;
10906 return FALSE;
10907 }
10908 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10909 loc += 4;
10910 size = 8;
10911 if (PPC_HA (r2off) != 0)
10912 {
10913 bfd_put_32 (htab->params->stub_bfd,
10914 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10915 loc += 4;
10916 size += 4;
10917 }
10918 if (PPC_LO (r2off) != 0)
10919 {
10920 bfd_put_32 (htab->params->stub_bfd,
10921 ADDI_R2_R2 | PPC_LO (r2off), loc);
10922 loc += 4;
10923 size += 4;
10924 }
10925 off -= size - 4;
10926 }
10927 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10928
10929 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10930 {
10931 info->callbacks->einfo
10932 (_("%P: long branch stub `%s' offset overflow\n"),
10933 stub_entry->root.string);
10934 htab->stub_error = TRUE;
10935 return FALSE;
10936 }
10937
10938 if (info->emitrelocations)
10939 {
10940 r = get_relocs (stub_entry->group->stub_sec, 1);
10941 if (r == NULL)
10942 return FALSE;
10943 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10944 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10945 r->r_addend = dest;
10946 if (stub_entry->h != NULL)
10947 {
10948 struct elf_link_hash_entry **hashes;
10949 unsigned long symndx;
10950 struct ppc_link_hash_entry *h;
10951
10952 hashes = elf_sym_hashes (htab->params->stub_bfd);
10953 if (hashes == NULL)
10954 {
10955 bfd_size_type hsize;
10956
10957 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10958 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10959 if (hashes == NULL)
10960 return FALSE;
10961 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10962 htab->stub_globals = 1;
10963 }
10964 symndx = htab->stub_globals++;
10965 h = stub_entry->h;
10966 hashes[symndx] = &h->elf;
10967 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10968 if (h->oh != NULL && h->oh->is_func)
10969 h = ppc_follow_link (h->oh);
10970 if (h->elf.root.u.def.section != stub_entry->target_section)
10971 /* H is an opd symbol. The addend must be zero. */
10972 r->r_addend = 0;
10973 else
10974 {
10975 off = (h->elf.root.u.def.value
10976 + h->elf.root.u.def.section->output_offset
10977 + h->elf.root.u.def.section->output_section->vma);
10978 r->r_addend -= off;
10979 }
10980 }
10981 }
10982 break;
10983
10984 case ppc_stub_plt_branch:
10985 case ppc_stub_plt_branch_r2off:
10986 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10987 stub_entry->root.string + 9,
10988 FALSE, FALSE);
10989 if (br_entry == NULL)
10990 {
10991 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10992 stub_entry->root.string);
10993 htab->stub_error = TRUE;
10994 return FALSE;
10995 }
10996
10997 dest = (stub_entry->target_value
10998 + stub_entry->target_section->output_offset
10999 + stub_entry->target_section->output_section->vma);
11000 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11001 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11002
11003 bfd_put_64 (htab->brlt->owner, dest,
11004 htab->brlt->contents + br_entry->offset);
11005
11006 if (br_entry->iter == htab->stub_iteration)
11007 {
11008 br_entry->iter = 0;
11009
11010 if (htab->relbrlt != NULL)
11011 {
11012 /* Create a reloc for the branch lookup table entry. */
11013 Elf_Internal_Rela rela;
11014 bfd_byte *rl;
11015
11016 rela.r_offset = (br_entry->offset
11017 + htab->brlt->output_offset
11018 + htab->brlt->output_section->vma);
11019 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11020 rela.r_addend = dest;
11021
11022 rl = htab->relbrlt->contents;
11023 rl += (htab->relbrlt->reloc_count++
11024 * sizeof (Elf64_External_Rela));
11025 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
11026 }
11027 else if (info->emitrelocations)
11028 {
11029 r = get_relocs (htab->brlt, 1);
11030 if (r == NULL)
11031 return FALSE;
11032 /* brlt, being SEC_LINKER_CREATED does not go through the
11033 normal reloc processing. Symbols and offsets are not
11034 translated from input file to output file form, so
11035 set up the offset per the output file. */
11036 r->r_offset = (br_entry->offset
11037 + htab->brlt->output_offset
11038 + htab->brlt->output_section->vma);
11039 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11040 r->r_addend = dest;
11041 }
11042 }
11043
11044 dest = (br_entry->offset
11045 + htab->brlt->output_offset
11046 + htab->brlt->output_section->vma);
11047
11048 off = (dest
11049 - elf_gp (htab->brlt->output_section->owner)
11050 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11051
11052 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11053 {
11054 info->callbacks->einfo
11055 (_("%P: linkage table error against `%T'\n"),
11056 stub_entry->root.string);
11057 bfd_set_error (bfd_error_bad_value);
11058 htab->stub_error = TRUE;
11059 return FALSE;
11060 }
11061
11062 if (info->emitrelocations)
11063 {
11064 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11065 if (r == NULL)
11066 return FALSE;
11067 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11068 if (bfd_big_endian (info->output_bfd))
11069 r[0].r_offset += 2;
11070 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11071 r[0].r_offset += 4;
11072 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11073 r[0].r_addend = dest;
11074 if (PPC_HA (off) != 0)
11075 {
11076 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11077 r[1].r_offset = r[0].r_offset + 4;
11078 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11079 r[1].r_addend = r[0].r_addend;
11080 }
11081 }
11082
11083 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11084 {
11085 if (PPC_HA (off) != 0)
11086 {
11087 size = 16;
11088 bfd_put_32 (htab->params->stub_bfd,
11089 ADDIS_R12_R2 | PPC_HA (off), loc);
11090 loc += 4;
11091 bfd_put_32 (htab->params->stub_bfd,
11092 LD_R12_0R12 | PPC_LO (off), loc);
11093 }
11094 else
11095 {
11096 size = 12;
11097 bfd_put_32 (htab->params->stub_bfd,
11098 LD_R12_0R2 | PPC_LO (off), loc);
11099 }
11100 }
11101 else
11102 {
11103 bfd_vma r2off = get_r2off (info, stub_entry);
11104
11105 if (r2off == (bfd_vma) -1)
11106 {
11107 htab->stub_error = TRUE;
11108 return FALSE;
11109 }
11110
11111 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11112 loc += 4;
11113 size = 16;
11114 if (PPC_HA (off) != 0)
11115 {
11116 size += 4;
11117 bfd_put_32 (htab->params->stub_bfd,
11118 ADDIS_R12_R2 | PPC_HA (off), loc);
11119 loc += 4;
11120 bfd_put_32 (htab->params->stub_bfd,
11121 LD_R12_0R12 | PPC_LO (off), loc);
11122 }
11123 else
11124 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11125
11126 if (PPC_HA (r2off) != 0)
11127 {
11128 size += 4;
11129 loc += 4;
11130 bfd_put_32 (htab->params->stub_bfd,
11131 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11132 }
11133 if (PPC_LO (r2off) != 0)
11134 {
11135 size += 4;
11136 loc += 4;
11137 bfd_put_32 (htab->params->stub_bfd,
11138 ADDI_R2_R2 | PPC_LO (r2off), loc);
11139 }
11140 }
11141 loc += 4;
11142 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11143 loc += 4;
11144 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11145 break;
11146
11147 case ppc_stub_plt_call:
11148 case ppc_stub_plt_call_r2save:
11149 if (stub_entry->h != NULL
11150 && stub_entry->h->is_func_descriptor
11151 && stub_entry->h->oh != NULL)
11152 {
11153 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11154
11155 /* If the old-ABI "dot-symbol" is undefined make it weak so
11156 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11157 if (fh->elf.root.type == bfd_link_hash_undefined
11158 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11159 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11160 fh->elf.root.type = bfd_link_hash_undefweak;
11161 }
11162
11163 /* Now build the stub. */
11164 dest = stub_entry->plt_ent->plt.offset & ~1;
11165 if (dest >= (bfd_vma) -2)
11166 abort ();
11167
11168 plt = htab->elf.splt;
11169 if (!htab->elf.dynamic_sections_created
11170 || stub_entry->h == NULL
11171 || stub_entry->h->elf.dynindx == -1)
11172 plt = htab->elf.iplt;
11173
11174 dest += plt->output_offset + plt->output_section->vma;
11175
11176 if (stub_entry->h == NULL
11177 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11178 {
11179 Elf_Internal_Rela rela;
11180 bfd_byte *rl;
11181
11182 rela.r_offset = dest;
11183 if (htab->opd_abi)
11184 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11185 else
11186 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11187 rela.r_addend = (stub_entry->target_value
11188 + stub_entry->target_section->output_offset
11189 + stub_entry->target_section->output_section->vma);
11190
11191 rl = (htab->elf.irelplt->contents
11192 + (htab->elf.irelplt->reloc_count++
11193 * sizeof (Elf64_External_Rela)));
11194 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11195 stub_entry->plt_ent->plt.offset |= 1;
11196 htab->local_ifunc_resolver = 1;
11197 }
11198
11199 off = (dest
11200 - elf_gp (plt->output_section->owner)
11201 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11202
11203 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11204 {
11205 info->callbacks->einfo
11206 /* xgettext:c-format */
11207 (_("%P: linkage table error against `%T'\n"),
11208 stub_entry->h != NULL
11209 ? stub_entry->h->elf.root.root.string
11210 : "<local sym>");
11211 bfd_set_error (bfd_error_bad_value);
11212 htab->stub_error = TRUE;
11213 return FALSE;
11214 }
11215
11216 if (htab->params->plt_stub_align != 0)
11217 {
11218 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11219
11220 stub_entry->group->stub_sec->size += pad;
11221 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11222 loc += pad;
11223 }
11224
11225 r = NULL;
11226 if (info->emitrelocations)
11227 {
11228 r = get_relocs (stub_entry->group->stub_sec,
11229 ((PPC_HA (off) != 0)
11230 + (htab->opd_abi
11231 ? 2 + (htab->params->plt_static_chain
11232 && PPC_HA (off + 16) == PPC_HA (off))
11233 : 1)));
11234 if (r == NULL)
11235 return FALSE;
11236 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11237 if (bfd_big_endian (info->output_bfd))
11238 r[0].r_offset += 2;
11239 r[0].r_addend = dest;
11240 }
11241 if (stub_entry->h != NULL
11242 && (stub_entry->h == htab->tls_get_addr_fd
11243 || stub_entry->h == htab->tls_get_addr)
11244 && htab->params->tls_get_addr_opt)
11245 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11246 else
11247 p = build_plt_stub (htab, stub_entry, loc, off, r);
11248 size = p - loc;
11249 break;
11250
11251 case ppc_stub_save_res:
11252 return TRUE;
11253
11254 default:
11255 BFD_FAIL ();
11256 return FALSE;
11257 }
11258
11259 stub_entry->group->stub_sec->size += size;
11260
11261 if (htab->params->emit_stub_syms)
11262 {
11263 struct elf_link_hash_entry *h;
11264 size_t len1, len2;
11265 char *name;
11266 const char *const stub_str[] = { "long_branch",
11267 "long_branch_r2off",
11268 "plt_branch",
11269 "plt_branch_r2off",
11270 "plt_call",
11271 "plt_call" };
11272
11273 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11274 len2 = strlen (stub_entry->root.string);
11275 name = bfd_malloc (len1 + len2 + 2);
11276 if (name == NULL)
11277 return FALSE;
11278 memcpy (name, stub_entry->root.string, 9);
11279 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11280 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11281 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11282 if (h == NULL)
11283 return FALSE;
11284 if (h->root.type == bfd_link_hash_new)
11285 {
11286 h->root.type = bfd_link_hash_defined;
11287 h->root.u.def.section = stub_entry->group->stub_sec;
11288 h->root.u.def.value = stub_entry->stub_offset;
11289 h->ref_regular = 1;
11290 h->def_regular = 1;
11291 h->ref_regular_nonweak = 1;
11292 h->forced_local = 1;
11293 h->non_elf = 0;
11294 h->root.linker_def = 1;
11295 }
11296 }
11297
11298 return TRUE;
11299 }
11300
11301 /* As above, but don't actually build the stub. Just bump offset so
11302 we know stub section sizes, and select plt_branch stubs where
11303 long_branch stubs won't do. */
11304
11305 static bfd_boolean
11306 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11307 {
11308 struct ppc_stub_hash_entry *stub_entry;
11309 struct bfd_link_info *info;
11310 struct ppc_link_hash_table *htab;
11311 bfd_vma off;
11312 int size;
11313
11314 /* Massage our args to the form they really have. */
11315 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11316 info = in_arg;
11317
11318 htab = ppc_hash_table (info);
11319 if (htab == NULL)
11320 return FALSE;
11321
11322 if (stub_entry->h != NULL
11323 && stub_entry->h->save_res
11324 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11325 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11326 {
11327 /* Don't make stubs to out-of-line register save/restore
11328 functions. Instead, emit copies of the functions. */
11329 stub_entry->group->needs_save_res = 1;
11330 stub_entry->stub_type = ppc_stub_save_res;
11331 return TRUE;
11332 }
11333
11334 if (stub_entry->stub_type == ppc_stub_plt_call
11335 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11336 {
11337 asection *plt;
11338 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11339 if (off >= (bfd_vma) -2)
11340 abort ();
11341 plt = htab->elf.splt;
11342 if (!htab->elf.dynamic_sections_created
11343 || stub_entry->h == NULL
11344 || stub_entry->h->elf.dynindx == -1)
11345 plt = htab->elf.iplt;
11346 off += (plt->output_offset
11347 + plt->output_section->vma
11348 - elf_gp (plt->output_section->owner)
11349 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11350
11351 size = plt_stub_size (htab, stub_entry, off);
11352 if (htab->params->plt_stub_align)
11353 size += plt_stub_pad (htab, stub_entry, off);
11354 if (info->emitrelocations)
11355 {
11356 stub_entry->group->stub_sec->reloc_count
11357 += ((PPC_HA (off) != 0)
11358 + (htab->opd_abi
11359 ? 2 + (htab->params->plt_static_chain
11360 && PPC_HA (off + 16) == PPC_HA (off))
11361 : 1));
11362 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11363 }
11364 }
11365 else
11366 {
11367 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11368 variants. */
11369 bfd_vma r2off = 0;
11370 bfd_vma local_off = 0;
11371
11372 off = (stub_entry->target_value
11373 + stub_entry->target_section->output_offset
11374 + stub_entry->target_section->output_section->vma);
11375 off -= (stub_entry->group->stub_sec->size
11376 + stub_entry->group->stub_sec->output_offset
11377 + stub_entry->group->stub_sec->output_section->vma);
11378
11379 /* Reset the stub type from the plt variant in case we now
11380 can reach with a shorter stub. */
11381 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11382 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11383
11384 size = 4;
11385 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11386 {
11387 r2off = get_r2off (info, stub_entry);
11388 if (r2off == (bfd_vma) -1)
11389 {
11390 htab->stub_error = TRUE;
11391 return FALSE;
11392 }
11393 size = 8;
11394 if (PPC_HA (r2off) != 0)
11395 size += 4;
11396 if (PPC_LO (r2off) != 0)
11397 size += 4;
11398 off -= size - 4;
11399 }
11400
11401 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11402
11403 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11404 Do the same for -R objects without function descriptors. */
11405 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11406 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11407 && r2off == 0
11408 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11409 {
11410 struct ppc_branch_hash_entry *br_entry;
11411
11412 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11413 stub_entry->root.string + 9,
11414 TRUE, FALSE);
11415 if (br_entry == NULL)
11416 {
11417 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11418 stub_entry->root.string);
11419 htab->stub_error = TRUE;
11420 return FALSE;
11421 }
11422
11423 if (br_entry->iter != htab->stub_iteration)
11424 {
11425 br_entry->iter = htab->stub_iteration;
11426 br_entry->offset = htab->brlt->size;
11427 htab->brlt->size += 8;
11428
11429 if (htab->relbrlt != NULL)
11430 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11431 else if (info->emitrelocations)
11432 {
11433 htab->brlt->reloc_count += 1;
11434 htab->brlt->flags |= SEC_RELOC;
11435 }
11436 }
11437
11438 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11439 off = (br_entry->offset
11440 + htab->brlt->output_offset
11441 + htab->brlt->output_section->vma
11442 - elf_gp (htab->brlt->output_section->owner)
11443 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11444
11445 if (info->emitrelocations)
11446 {
11447 stub_entry->group->stub_sec->reloc_count
11448 += 1 + (PPC_HA (off) != 0);
11449 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11450 }
11451
11452 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11453 {
11454 size = 12;
11455 if (PPC_HA (off) != 0)
11456 size = 16;
11457 }
11458 else
11459 {
11460 size = 16;
11461 if (PPC_HA (off) != 0)
11462 size += 4;
11463
11464 if (PPC_HA (r2off) != 0)
11465 size += 4;
11466 if (PPC_LO (r2off) != 0)
11467 size += 4;
11468 }
11469 }
11470 else if (info->emitrelocations)
11471 {
11472 stub_entry->group->stub_sec->reloc_count += 1;
11473 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11474 }
11475 }
11476
11477 stub_entry->group->stub_sec->size += size;
11478 return TRUE;
11479 }
11480
11481 /* Set up various things so that we can make a list of input sections
11482 for each output section included in the link. Returns -1 on error,
11483 0 when no stubs will be needed, and 1 on success. */
11484
11485 int
11486 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11487 {
11488 unsigned int id;
11489 bfd_size_type amt;
11490 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11491
11492 if (htab == NULL)
11493 return -1;
11494
11495 htab->sec_info_arr_size = bfd_get_next_section_id ();
11496 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11497 htab->sec_info = bfd_zmalloc (amt);
11498 if (htab->sec_info == NULL)
11499 return -1;
11500
11501 /* Set toc_off for com, und, abs and ind sections. */
11502 for (id = 0; id < 3; id++)
11503 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11504
11505 return 1;
11506 }
11507
11508 /* Set up for first pass at multitoc partitioning. */
11509
11510 void
11511 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11512 {
11513 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11514
11515 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11516 htab->toc_bfd = NULL;
11517 htab->toc_first_sec = NULL;
11518 }
11519
11520 /* The linker repeatedly calls this function for each TOC input section
11521 and linker generated GOT section. Group input bfds such that the toc
11522 within a group is less than 64k in size. */
11523
11524 bfd_boolean
11525 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11526 {
11527 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11528 bfd_vma addr, off, limit;
11529
11530 if (htab == NULL)
11531 return FALSE;
11532
11533 if (!htab->second_toc_pass)
11534 {
11535 /* Keep track of the first .toc or .got section for this input bfd. */
11536 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11537
11538 if (new_bfd)
11539 {
11540 htab->toc_bfd = isec->owner;
11541 htab->toc_first_sec = isec;
11542 }
11543
11544 addr = isec->output_offset + isec->output_section->vma;
11545 off = addr - htab->toc_curr;
11546 limit = 0x80008000;
11547 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11548 limit = 0x10000;
11549 if (off + isec->size > limit)
11550 {
11551 addr = (htab->toc_first_sec->output_offset
11552 + htab->toc_first_sec->output_section->vma);
11553 htab->toc_curr = addr;
11554 htab->toc_curr &= -TOC_BASE_ALIGN;
11555 }
11556
11557 /* toc_curr is the base address of this toc group. Set elf_gp
11558 for the input section to be the offset relative to the
11559 output toc base plus 0x8000. Making the input elf_gp an
11560 offset allows us to move the toc as a whole without
11561 recalculating input elf_gp. */
11562 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11563 off += TOC_BASE_OFF;
11564
11565 /* Die if someone uses a linker script that doesn't keep input
11566 file .toc and .got together. */
11567 if (new_bfd
11568 && elf_gp (isec->owner) != 0
11569 && elf_gp (isec->owner) != off)
11570 return FALSE;
11571
11572 elf_gp (isec->owner) = off;
11573 return TRUE;
11574 }
11575
11576 /* During the second pass toc_first_sec points to the start of
11577 a toc group, and toc_curr is used to track the old elf_gp.
11578 We use toc_bfd to ensure we only look at each bfd once. */
11579 if (htab->toc_bfd == isec->owner)
11580 return TRUE;
11581 htab->toc_bfd = isec->owner;
11582
11583 if (htab->toc_first_sec == NULL
11584 || htab->toc_curr != elf_gp (isec->owner))
11585 {
11586 htab->toc_curr = elf_gp (isec->owner);
11587 htab->toc_first_sec = isec;
11588 }
11589 addr = (htab->toc_first_sec->output_offset
11590 + htab->toc_first_sec->output_section->vma);
11591 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11592 elf_gp (isec->owner) = off;
11593
11594 return TRUE;
11595 }
11596
11597 /* Called via elf_link_hash_traverse to merge GOT entries for global
11598 symbol H. */
11599
11600 static bfd_boolean
11601 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11602 {
11603 if (h->root.type == bfd_link_hash_indirect)
11604 return TRUE;
11605
11606 merge_got_entries (&h->got.glist);
11607
11608 return TRUE;
11609 }
11610
11611 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11612 symbol H. */
11613
11614 static bfd_boolean
11615 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11616 {
11617 struct got_entry *gent;
11618
11619 if (h->root.type == bfd_link_hash_indirect)
11620 return TRUE;
11621
11622 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11623 if (!gent->is_indirect)
11624 allocate_got (h, (struct bfd_link_info *) inf, gent);
11625 return TRUE;
11626 }
11627
11628 /* Called on the first multitoc pass after the last call to
11629 ppc64_elf_next_toc_section. This function removes duplicate GOT
11630 entries. */
11631
11632 bfd_boolean
11633 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11634 {
11635 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11636 struct bfd *ibfd, *ibfd2;
11637 bfd_boolean done_something;
11638
11639 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11640
11641 if (!htab->do_multi_toc)
11642 return FALSE;
11643
11644 /* Merge global sym got entries within a toc group. */
11645 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11646
11647 /* And tlsld_got. */
11648 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11649 {
11650 struct got_entry *ent, *ent2;
11651
11652 if (!is_ppc64_elf (ibfd))
11653 continue;
11654
11655 ent = ppc64_tlsld_got (ibfd);
11656 if (!ent->is_indirect
11657 && ent->got.offset != (bfd_vma) -1)
11658 {
11659 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11660 {
11661 if (!is_ppc64_elf (ibfd2))
11662 continue;
11663
11664 ent2 = ppc64_tlsld_got (ibfd2);
11665 if (!ent2->is_indirect
11666 && ent2->got.offset != (bfd_vma) -1
11667 && elf_gp (ibfd2) == elf_gp (ibfd))
11668 {
11669 ent2->is_indirect = TRUE;
11670 ent2->got.ent = ent;
11671 }
11672 }
11673 }
11674 }
11675
11676 /* Zap sizes of got sections. */
11677 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11678 htab->elf.irelplt->size -= htab->got_reli_size;
11679 htab->got_reli_size = 0;
11680
11681 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11682 {
11683 asection *got, *relgot;
11684
11685 if (!is_ppc64_elf (ibfd))
11686 continue;
11687
11688 got = ppc64_elf_tdata (ibfd)->got;
11689 if (got != NULL)
11690 {
11691 got->rawsize = got->size;
11692 got->size = 0;
11693 relgot = ppc64_elf_tdata (ibfd)->relgot;
11694 relgot->rawsize = relgot->size;
11695 relgot->size = 0;
11696 }
11697 }
11698
11699 /* Now reallocate the got, local syms first. We don't need to
11700 allocate section contents again since we never increase size. */
11701 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11702 {
11703 struct got_entry **lgot_ents;
11704 struct got_entry **end_lgot_ents;
11705 struct plt_entry **local_plt;
11706 struct plt_entry **end_local_plt;
11707 unsigned char *lgot_masks;
11708 bfd_size_type locsymcount;
11709 Elf_Internal_Shdr *symtab_hdr;
11710 asection *s;
11711
11712 if (!is_ppc64_elf (ibfd))
11713 continue;
11714
11715 lgot_ents = elf_local_got_ents (ibfd);
11716 if (!lgot_ents)
11717 continue;
11718
11719 symtab_hdr = &elf_symtab_hdr (ibfd);
11720 locsymcount = symtab_hdr->sh_info;
11721 end_lgot_ents = lgot_ents + locsymcount;
11722 local_plt = (struct plt_entry **) end_lgot_ents;
11723 end_local_plt = local_plt + locsymcount;
11724 lgot_masks = (unsigned char *) end_local_plt;
11725 s = ppc64_elf_tdata (ibfd)->got;
11726 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11727 {
11728 struct got_entry *ent;
11729
11730 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11731 {
11732 unsigned int ent_size = 8;
11733 unsigned int rel_size = sizeof (Elf64_External_Rela);
11734
11735 ent->got.offset = s->size;
11736 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11737 {
11738 ent_size *= 2;
11739 rel_size *= 2;
11740 }
11741 s->size += ent_size;
11742 if ((*lgot_masks & PLT_IFUNC) != 0)
11743 {
11744 htab->elf.irelplt->size += rel_size;
11745 htab->got_reli_size += rel_size;
11746 }
11747 else if (bfd_link_pic (info))
11748 {
11749 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11750 srel->size += rel_size;
11751 }
11752 }
11753 }
11754 }
11755
11756 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11757
11758 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11759 {
11760 struct got_entry *ent;
11761
11762 if (!is_ppc64_elf (ibfd))
11763 continue;
11764
11765 ent = ppc64_tlsld_got (ibfd);
11766 if (!ent->is_indirect
11767 && ent->got.offset != (bfd_vma) -1)
11768 {
11769 asection *s = ppc64_elf_tdata (ibfd)->got;
11770 ent->got.offset = s->size;
11771 s->size += 16;
11772 if (bfd_link_pic (info))
11773 {
11774 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11775 srel->size += sizeof (Elf64_External_Rela);
11776 }
11777 }
11778 }
11779
11780 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11781 if (!done_something)
11782 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11783 {
11784 asection *got;
11785
11786 if (!is_ppc64_elf (ibfd))
11787 continue;
11788
11789 got = ppc64_elf_tdata (ibfd)->got;
11790 if (got != NULL)
11791 {
11792 done_something = got->rawsize != got->size;
11793 if (done_something)
11794 break;
11795 }
11796 }
11797
11798 if (done_something)
11799 (*htab->params->layout_sections_again) ();
11800
11801 /* Set up for second pass over toc sections to recalculate elf_gp
11802 on input sections. */
11803 htab->toc_bfd = NULL;
11804 htab->toc_first_sec = NULL;
11805 htab->second_toc_pass = TRUE;
11806 return done_something;
11807 }
11808
11809 /* Called after second pass of multitoc partitioning. */
11810
11811 void
11812 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11813 {
11814 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11815
11816 /* After the second pass, toc_curr tracks the TOC offset used
11817 for code sections below in ppc64_elf_next_input_section. */
11818 htab->toc_curr = TOC_BASE_OFF;
11819 }
11820
11821 /* No toc references were found in ISEC. If the code in ISEC makes no
11822 calls, then there's no need to use toc adjusting stubs when branching
11823 into ISEC. Actually, indirect calls from ISEC are OK as they will
11824 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11825 needed, and 2 if a cyclical call-graph was found but no other reason
11826 for a stub was detected. If called from the top level, a return of
11827 2 means the same as a return of 0. */
11828
11829 static int
11830 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11831 {
11832 int ret;
11833
11834 /* Mark this section as checked. */
11835 isec->call_check_done = 1;
11836
11837 /* We know none of our code bearing sections will need toc stubs. */
11838 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11839 return 0;
11840
11841 if (isec->size == 0)
11842 return 0;
11843
11844 if (isec->output_section == NULL)
11845 return 0;
11846
11847 ret = 0;
11848 if (isec->reloc_count != 0)
11849 {
11850 Elf_Internal_Rela *relstart, *rel;
11851 Elf_Internal_Sym *local_syms;
11852 struct ppc_link_hash_table *htab;
11853
11854 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11855 info->keep_memory);
11856 if (relstart == NULL)
11857 return -1;
11858
11859 /* Look for branches to outside of this section. */
11860 local_syms = NULL;
11861 htab = ppc_hash_table (info);
11862 if (htab == NULL)
11863 return -1;
11864
11865 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11866 {
11867 enum elf_ppc64_reloc_type r_type;
11868 unsigned long r_symndx;
11869 struct elf_link_hash_entry *h;
11870 struct ppc_link_hash_entry *eh;
11871 Elf_Internal_Sym *sym;
11872 asection *sym_sec;
11873 struct _opd_sec_data *opd;
11874 bfd_vma sym_value;
11875 bfd_vma dest;
11876
11877 r_type = ELF64_R_TYPE (rel->r_info);
11878 if (r_type != R_PPC64_REL24
11879 && r_type != R_PPC64_REL14
11880 && r_type != R_PPC64_REL14_BRTAKEN
11881 && r_type != R_PPC64_REL14_BRNTAKEN)
11882 continue;
11883
11884 r_symndx = ELF64_R_SYM (rel->r_info);
11885 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11886 isec->owner))
11887 {
11888 ret = -1;
11889 break;
11890 }
11891
11892 /* Calls to dynamic lib functions go through a plt call stub
11893 that uses r2. */
11894 eh = (struct ppc_link_hash_entry *) h;
11895 if (eh != NULL
11896 && (eh->elf.plt.plist != NULL
11897 || (eh->oh != NULL
11898 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11899 {
11900 ret = 1;
11901 break;
11902 }
11903
11904 if (sym_sec == NULL)
11905 /* Ignore other undefined symbols. */
11906 continue;
11907
11908 /* Assume branches to other sections not included in the
11909 link need stubs too, to cover -R and absolute syms. */
11910 if (sym_sec->output_section == NULL)
11911 {
11912 ret = 1;
11913 break;
11914 }
11915
11916 if (h == NULL)
11917 sym_value = sym->st_value;
11918 else
11919 {
11920 if (h->root.type != bfd_link_hash_defined
11921 && h->root.type != bfd_link_hash_defweak)
11922 abort ();
11923 sym_value = h->root.u.def.value;
11924 }
11925 sym_value += rel->r_addend;
11926
11927 /* If this branch reloc uses an opd sym, find the code section. */
11928 opd = get_opd_info (sym_sec);
11929 if (opd != NULL)
11930 {
11931 if (h == NULL && opd->adjust != NULL)
11932 {
11933 long adjust;
11934
11935 adjust = opd->adjust[OPD_NDX (sym_value)];
11936 if (adjust == -1)
11937 /* Assume deleted functions won't ever be called. */
11938 continue;
11939 sym_value += adjust;
11940 }
11941
11942 dest = opd_entry_value (sym_sec, sym_value,
11943 &sym_sec, NULL, FALSE);
11944 if (dest == (bfd_vma) -1)
11945 continue;
11946 }
11947 else
11948 dest = (sym_value
11949 + sym_sec->output_offset
11950 + sym_sec->output_section->vma);
11951
11952 /* Ignore branch to self. */
11953 if (sym_sec == isec)
11954 continue;
11955
11956 /* If the called function uses the toc, we need a stub. */
11957 if (sym_sec->has_toc_reloc
11958 || sym_sec->makes_toc_func_call)
11959 {
11960 ret = 1;
11961 break;
11962 }
11963
11964 /* Assume any branch that needs a long branch stub might in fact
11965 need a plt_branch stub. A plt_branch stub uses r2. */
11966 else if (dest - (isec->output_offset
11967 + isec->output_section->vma
11968 + rel->r_offset) + (1 << 25)
11969 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11970 ? h->other
11971 : sym->st_other))
11972 {
11973 ret = 1;
11974 break;
11975 }
11976
11977 /* If calling back to a section in the process of being
11978 tested, we can't say for sure that no toc adjusting stubs
11979 are needed, so don't return zero. */
11980 else if (sym_sec->call_check_in_progress)
11981 ret = 2;
11982
11983 /* Branches to another section that itself doesn't have any TOC
11984 references are OK. Recursively call ourselves to check. */
11985 else if (!sym_sec->call_check_done)
11986 {
11987 int recur;
11988
11989 /* Mark current section as indeterminate, so that other
11990 sections that call back to current won't be marked as
11991 known. */
11992 isec->call_check_in_progress = 1;
11993 recur = toc_adjusting_stub_needed (info, sym_sec);
11994 isec->call_check_in_progress = 0;
11995
11996 if (recur != 0)
11997 {
11998 ret = recur;
11999 if (recur != 2)
12000 break;
12001 }
12002 }
12003 }
12004
12005 if (local_syms != NULL
12006 && (elf_symtab_hdr (isec->owner).contents
12007 != (unsigned char *) local_syms))
12008 free (local_syms);
12009 if (elf_section_data (isec)->relocs != relstart)
12010 free (relstart);
12011 }
12012
12013 if ((ret & 1) == 0
12014 && isec->map_head.s != NULL
12015 && (strcmp (isec->output_section->name, ".init") == 0
12016 || strcmp (isec->output_section->name, ".fini") == 0))
12017 {
12018 if (isec->map_head.s->has_toc_reloc
12019 || isec->map_head.s->makes_toc_func_call)
12020 ret = 1;
12021 else if (!isec->map_head.s->call_check_done)
12022 {
12023 int recur;
12024 isec->call_check_in_progress = 1;
12025 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
12026 isec->call_check_in_progress = 0;
12027 if (recur != 0)
12028 ret = recur;
12029 }
12030 }
12031
12032 if (ret == 1)
12033 isec->makes_toc_func_call = 1;
12034
12035 return ret;
12036 }
12037
12038 /* The linker repeatedly calls this function for each input section,
12039 in the order that input sections are linked into output sections.
12040 Build lists of input sections to determine groupings between which
12041 we may insert linker stubs. */
12042
12043 bfd_boolean
12044 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
12045 {
12046 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12047
12048 if (htab == NULL)
12049 return FALSE;
12050
12051 if ((isec->output_section->flags & SEC_CODE) != 0
12052 && isec->output_section->id < htab->sec_info_arr_size)
12053 {
12054 /* This happens to make the list in reverse order,
12055 which is what we want. */
12056 htab->sec_info[isec->id].u.list
12057 = htab->sec_info[isec->output_section->id].u.list;
12058 htab->sec_info[isec->output_section->id].u.list = isec;
12059 }
12060
12061 if (htab->multi_toc_needed)
12062 {
12063 /* Analyse sections that aren't already flagged as needing a
12064 valid toc pointer. Exclude .fixup for the linux kernel.
12065 .fixup contains branches, but only back to the function that
12066 hit an exception. */
12067 if (!(isec->has_toc_reloc
12068 || (isec->flags & SEC_CODE) == 0
12069 || strcmp (isec->name, ".fixup") == 0
12070 || isec->call_check_done))
12071 {
12072 if (toc_adjusting_stub_needed (info, isec) < 0)
12073 return FALSE;
12074 }
12075 /* Make all sections use the TOC assigned for this object file.
12076 This will be wrong for pasted sections; We fix that in
12077 check_pasted_section(). */
12078 if (elf_gp (isec->owner) != 0)
12079 htab->toc_curr = elf_gp (isec->owner);
12080 }
12081
12082 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12083 return TRUE;
12084 }
12085
12086 /* Check that all .init and .fini sections use the same toc, if they
12087 have toc relocs. */
12088
12089 static bfd_boolean
12090 check_pasted_section (struct bfd_link_info *info, const char *name)
12091 {
12092 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12093
12094 if (o != NULL)
12095 {
12096 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12097 bfd_vma toc_off = 0;
12098 asection *i;
12099
12100 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12101 if (i->has_toc_reloc)
12102 {
12103 if (toc_off == 0)
12104 toc_off = htab->sec_info[i->id].toc_off;
12105 else if (toc_off != htab->sec_info[i->id].toc_off)
12106 return FALSE;
12107 }
12108
12109 if (toc_off == 0)
12110 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12111 if (i->makes_toc_func_call)
12112 {
12113 toc_off = htab->sec_info[i->id].toc_off;
12114 break;
12115 }
12116
12117 /* Make sure the whole pasted function uses the same toc offset. */
12118 if (toc_off != 0)
12119 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12120 htab->sec_info[i->id].toc_off = toc_off;
12121 }
12122 return TRUE;
12123 }
12124
12125 bfd_boolean
12126 ppc64_elf_check_init_fini (struct bfd_link_info *info)
12127 {
12128 return (check_pasted_section (info, ".init")
12129 & check_pasted_section (info, ".fini"));
12130 }
12131
12132 /* See whether we can group stub sections together. Grouping stub
12133 sections may result in fewer stubs. More importantly, we need to
12134 put all .init* and .fini* stubs at the beginning of the .init or
12135 .fini output sections respectively, because glibc splits the
12136 _init and _fini functions into multiple parts. Putting a stub in
12137 the middle of a function is not a good idea. */
12138
12139 static bfd_boolean
12140 group_sections (struct bfd_link_info *info,
12141 bfd_size_type stub_group_size,
12142 bfd_boolean stubs_always_before_branch)
12143 {
12144 struct ppc_link_hash_table *htab;
12145 asection *osec;
12146 bfd_boolean suppress_size_errors;
12147
12148 htab = ppc_hash_table (info);
12149 if (htab == NULL)
12150 return FALSE;
12151
12152 suppress_size_errors = FALSE;
12153 if (stub_group_size == 1)
12154 {
12155 /* Default values. */
12156 if (stubs_always_before_branch)
12157 stub_group_size = 0x1e00000;
12158 else
12159 stub_group_size = 0x1c00000;
12160 suppress_size_errors = TRUE;
12161 }
12162
12163 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12164 {
12165 asection *tail;
12166
12167 if (osec->id >= htab->sec_info_arr_size)
12168 continue;
12169
12170 tail = htab->sec_info[osec->id].u.list;
12171 while (tail != NULL)
12172 {
12173 asection *curr;
12174 asection *prev;
12175 bfd_size_type total;
12176 bfd_boolean big_sec;
12177 bfd_vma curr_toc;
12178 struct map_stub *group;
12179 bfd_size_type group_size;
12180
12181 curr = tail;
12182 total = tail->size;
12183 group_size = (ppc64_elf_section_data (tail) != NULL
12184 && ppc64_elf_section_data (tail)->has_14bit_branch
12185 ? stub_group_size >> 10 : stub_group_size);
12186
12187 big_sec = total > group_size;
12188 if (big_sec && !suppress_size_errors)
12189 /* xgettext:c-format */
12190 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12191 tail->owner, tail);
12192 curr_toc = htab->sec_info[tail->id].toc_off;
12193
12194 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12195 && ((total += curr->output_offset - prev->output_offset)
12196 < (ppc64_elf_section_data (prev) != NULL
12197 && ppc64_elf_section_data (prev)->has_14bit_branch
12198 ? (group_size = stub_group_size >> 10) : group_size))
12199 && htab->sec_info[prev->id].toc_off == curr_toc)
12200 curr = prev;
12201
12202 /* OK, the size from the start of CURR to the end is less
12203 than group_size and thus can be handled by one stub
12204 section. (or the tail section is itself larger than
12205 group_size, in which case we may be toast.) We should
12206 really be keeping track of the total size of stubs added
12207 here, as stubs contribute to the final output section
12208 size. That's a little tricky, and this way will only
12209 break if stubs added make the total size more than 2^25,
12210 ie. for the default stub_group_size, if stubs total more
12211 than 2097152 bytes, or nearly 75000 plt call stubs. */
12212 group = bfd_alloc (curr->owner, sizeof (*group));
12213 if (group == NULL)
12214 return FALSE;
12215 group->link_sec = curr;
12216 group->stub_sec = NULL;
12217 group->needs_save_res = 0;
12218 group->next = htab->group;
12219 htab->group = group;
12220 do
12221 {
12222 prev = htab->sec_info[tail->id].u.list;
12223 /* Set up this stub group. */
12224 htab->sec_info[tail->id].u.group = group;
12225 }
12226 while (tail != curr && (tail = prev) != NULL);
12227
12228 /* But wait, there's more! Input sections up to group_size
12229 bytes before the stub section can be handled by it too.
12230 Don't do this if we have a really large section after the
12231 stubs, as adding more stubs increases the chance that
12232 branches may not reach into the stub section. */
12233 if (!stubs_always_before_branch && !big_sec)
12234 {
12235 total = 0;
12236 while (prev != NULL
12237 && ((total += tail->output_offset - prev->output_offset)
12238 < (ppc64_elf_section_data (prev) != NULL
12239 && ppc64_elf_section_data (prev)->has_14bit_branch
12240 ? (group_size = stub_group_size >> 10) : group_size))
12241 && htab->sec_info[prev->id].toc_off == curr_toc)
12242 {
12243 tail = prev;
12244 prev = htab->sec_info[tail->id].u.list;
12245 htab->sec_info[tail->id].u.group = group;
12246 }
12247 }
12248 tail = prev;
12249 }
12250 }
12251 return TRUE;
12252 }
12253
12254 static const unsigned char glink_eh_frame_cie[] =
12255 {
12256 0, 0, 0, 16, /* length. */
12257 0, 0, 0, 0, /* id. */
12258 1, /* CIE version. */
12259 'z', 'R', 0, /* Augmentation string. */
12260 4, /* Code alignment. */
12261 0x78, /* Data alignment. */
12262 65, /* RA reg. */
12263 1, /* Augmentation size. */
12264 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12265 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
12266 };
12267
12268 /* Stripping output sections is normally done before dynamic section
12269 symbols have been allocated. This function is called later, and
12270 handles cases like htab->brlt which is mapped to its own output
12271 section. */
12272
12273 static void
12274 maybe_strip_output (struct bfd_link_info *info, asection *isec)
12275 {
12276 if (isec->size == 0
12277 && isec->output_section->size == 0
12278 && !(isec->output_section->flags & SEC_KEEP)
12279 && !bfd_section_removed_from_list (info->output_bfd,
12280 isec->output_section)
12281 && elf_section_data (isec->output_section)->dynindx == 0)
12282 {
12283 isec->output_section->flags |= SEC_EXCLUDE;
12284 bfd_section_list_remove (info->output_bfd, isec->output_section);
12285 info->output_bfd->section_count--;
12286 }
12287 }
12288
12289 /* Determine and set the size of the stub section for a final link.
12290
12291 The basic idea here is to examine all the relocations looking for
12292 PC-relative calls to a target that is unreachable with a "bl"
12293 instruction. */
12294
12295 bfd_boolean
12296 ppc64_elf_size_stubs (struct bfd_link_info *info)
12297 {
12298 bfd_size_type stub_group_size;
12299 bfd_boolean stubs_always_before_branch;
12300 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12301
12302 if (htab == NULL)
12303 return FALSE;
12304
12305 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12306 htab->params->plt_thread_safe = 1;
12307 if (!htab->opd_abi)
12308 htab->params->plt_thread_safe = 0;
12309 else if (htab->params->plt_thread_safe == -1)
12310 {
12311 static const char *const thread_starter[] =
12312 {
12313 "pthread_create",
12314 /* libstdc++ */
12315 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12316 /* librt */
12317 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12318 "mq_notify", "create_timer",
12319 /* libanl */
12320 "getaddrinfo_a",
12321 /* libgomp */
12322 "GOMP_parallel",
12323 "GOMP_parallel_start",
12324 "GOMP_parallel_loop_static",
12325 "GOMP_parallel_loop_static_start",
12326 "GOMP_parallel_loop_dynamic",
12327 "GOMP_parallel_loop_dynamic_start",
12328 "GOMP_parallel_loop_guided",
12329 "GOMP_parallel_loop_guided_start",
12330 "GOMP_parallel_loop_runtime",
12331 "GOMP_parallel_loop_runtime_start",
12332 "GOMP_parallel_sections",
12333 "GOMP_parallel_sections_start",
12334 /* libgo */
12335 "__go_go",
12336 };
12337 unsigned i;
12338
12339 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12340 {
12341 struct elf_link_hash_entry *h;
12342 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12343 FALSE, FALSE, TRUE);
12344 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12345 if (htab->params->plt_thread_safe)
12346 break;
12347 }
12348 }
12349 stubs_always_before_branch = htab->params->group_size < 0;
12350 if (htab->params->group_size < 0)
12351 stub_group_size = -htab->params->group_size;
12352 else
12353 stub_group_size = htab->params->group_size;
12354
12355 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12356 return FALSE;
12357
12358 #define STUB_SHRINK_ITER 20
12359 /* Loop until no stubs added. After iteration 20 of this loop we may
12360 exit on a stub section shrinking. This is to break out of a
12361 pathological case where adding stubs on one iteration decreases
12362 section gaps (perhaps due to alignment), which then requires
12363 fewer or smaller stubs on the next iteration. */
12364
12365 while (1)
12366 {
12367 bfd *input_bfd;
12368 unsigned int bfd_indx;
12369 struct map_stub *group;
12370 asection *stub_sec;
12371
12372 htab->stub_iteration += 1;
12373
12374 for (input_bfd = info->input_bfds, bfd_indx = 0;
12375 input_bfd != NULL;
12376 input_bfd = input_bfd->link.next, bfd_indx++)
12377 {
12378 Elf_Internal_Shdr *symtab_hdr;
12379 asection *section;
12380 Elf_Internal_Sym *local_syms = NULL;
12381
12382 if (!is_ppc64_elf (input_bfd))
12383 continue;
12384
12385 /* We'll need the symbol table in a second. */
12386 symtab_hdr = &elf_symtab_hdr (input_bfd);
12387 if (symtab_hdr->sh_info == 0)
12388 continue;
12389
12390 /* Walk over each section attached to the input bfd. */
12391 for (section = input_bfd->sections;
12392 section != NULL;
12393 section = section->next)
12394 {
12395 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12396
12397 /* If there aren't any relocs, then there's nothing more
12398 to do. */
12399 if ((section->flags & SEC_RELOC) == 0
12400 || (section->flags & SEC_ALLOC) == 0
12401 || (section->flags & SEC_LOAD) == 0
12402 || (section->flags & SEC_CODE) == 0
12403 || section->reloc_count == 0)
12404 continue;
12405
12406 /* If this section is a link-once section that will be
12407 discarded, then don't create any stubs. */
12408 if (section->output_section == NULL
12409 || section->output_section->owner != info->output_bfd)
12410 continue;
12411
12412 /* Get the relocs. */
12413 internal_relocs
12414 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12415 info->keep_memory);
12416 if (internal_relocs == NULL)
12417 goto error_ret_free_local;
12418
12419 /* Now examine each relocation. */
12420 irela = internal_relocs;
12421 irelaend = irela + section->reloc_count;
12422 for (; irela < irelaend; irela++)
12423 {
12424 enum elf_ppc64_reloc_type r_type;
12425 unsigned int r_indx;
12426 enum ppc_stub_type stub_type;
12427 struct ppc_stub_hash_entry *stub_entry;
12428 asection *sym_sec, *code_sec;
12429 bfd_vma sym_value, code_value;
12430 bfd_vma destination;
12431 unsigned long local_off;
12432 bfd_boolean ok_dest;
12433 struct ppc_link_hash_entry *hash;
12434 struct ppc_link_hash_entry *fdh;
12435 struct elf_link_hash_entry *h;
12436 Elf_Internal_Sym *sym;
12437 char *stub_name;
12438 const asection *id_sec;
12439 struct _opd_sec_data *opd;
12440 struct plt_entry *plt_ent;
12441
12442 r_type = ELF64_R_TYPE (irela->r_info);
12443 r_indx = ELF64_R_SYM (irela->r_info);
12444
12445 if (r_type >= R_PPC64_max)
12446 {
12447 bfd_set_error (bfd_error_bad_value);
12448 goto error_ret_free_internal;
12449 }
12450
12451 /* Only look for stubs on branch instructions. */
12452 if (r_type != R_PPC64_REL24
12453 && r_type != R_PPC64_REL14
12454 && r_type != R_PPC64_REL14_BRTAKEN
12455 && r_type != R_PPC64_REL14_BRNTAKEN)
12456 continue;
12457
12458 /* Now determine the call target, its name, value,
12459 section. */
12460 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12461 r_indx, input_bfd))
12462 goto error_ret_free_internal;
12463 hash = (struct ppc_link_hash_entry *) h;
12464
12465 ok_dest = FALSE;
12466 fdh = NULL;
12467 sym_value = 0;
12468 if (hash == NULL)
12469 {
12470 sym_value = sym->st_value;
12471 if (sym_sec != NULL
12472 && sym_sec->output_section != NULL)
12473 ok_dest = TRUE;
12474 }
12475 else if (hash->elf.root.type == bfd_link_hash_defined
12476 || hash->elf.root.type == bfd_link_hash_defweak)
12477 {
12478 sym_value = hash->elf.root.u.def.value;
12479 if (sym_sec->output_section != NULL)
12480 ok_dest = TRUE;
12481 }
12482 else if (hash->elf.root.type == bfd_link_hash_undefweak
12483 || hash->elf.root.type == bfd_link_hash_undefined)
12484 {
12485 /* Recognise an old ABI func code entry sym, and
12486 use the func descriptor sym instead if it is
12487 defined. */
12488 if (hash->elf.root.root.string[0] == '.'
12489 && hash->oh != NULL)
12490 {
12491 fdh = ppc_follow_link (hash->oh);
12492 if (fdh->elf.root.type == bfd_link_hash_defined
12493 || fdh->elf.root.type == bfd_link_hash_defweak)
12494 {
12495 sym_sec = fdh->elf.root.u.def.section;
12496 sym_value = fdh->elf.root.u.def.value;
12497 if (sym_sec->output_section != NULL)
12498 ok_dest = TRUE;
12499 }
12500 else
12501 fdh = NULL;
12502 }
12503 }
12504 else
12505 {
12506 bfd_set_error (bfd_error_bad_value);
12507 goto error_ret_free_internal;
12508 }
12509
12510 destination = 0;
12511 local_off = 0;
12512 if (ok_dest)
12513 {
12514 sym_value += irela->r_addend;
12515 destination = (sym_value
12516 + sym_sec->output_offset
12517 + sym_sec->output_section->vma);
12518 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12519 ? hash->elf.other
12520 : sym->st_other);
12521 }
12522
12523 code_sec = sym_sec;
12524 code_value = sym_value;
12525 opd = get_opd_info (sym_sec);
12526 if (opd != NULL)
12527 {
12528 bfd_vma dest;
12529
12530 if (hash == NULL && opd->adjust != NULL)
12531 {
12532 long adjust = opd->adjust[OPD_NDX (sym_value)];
12533 if (adjust == -1)
12534 continue;
12535 code_value += adjust;
12536 sym_value += adjust;
12537 }
12538 dest = opd_entry_value (sym_sec, sym_value,
12539 &code_sec, &code_value, FALSE);
12540 if (dest != (bfd_vma) -1)
12541 {
12542 destination = dest;
12543 if (fdh != NULL)
12544 {
12545 /* Fixup old ABI sym to point at code
12546 entry. */
12547 hash->elf.root.type = bfd_link_hash_defweak;
12548 hash->elf.root.u.def.section = code_sec;
12549 hash->elf.root.u.def.value = code_value;
12550 }
12551 }
12552 }
12553
12554 /* Determine what (if any) linker stub is needed. */
12555 plt_ent = NULL;
12556 stub_type = ppc_type_of_stub (section, irela, &hash,
12557 &plt_ent, destination,
12558 local_off);
12559
12560 if (stub_type != ppc_stub_plt_call)
12561 {
12562 /* Check whether we need a TOC adjusting stub.
12563 Since the linker pastes together pieces from
12564 different object files when creating the
12565 _init and _fini functions, it may be that a
12566 call to what looks like a local sym is in
12567 fact a call needing a TOC adjustment. */
12568 if (code_sec != NULL
12569 && code_sec->output_section != NULL
12570 && (htab->sec_info[code_sec->id].toc_off
12571 != htab->sec_info[section->id].toc_off)
12572 && (code_sec->has_toc_reloc
12573 || code_sec->makes_toc_func_call))
12574 stub_type = ppc_stub_long_branch_r2off;
12575 }
12576
12577 if (stub_type == ppc_stub_none)
12578 continue;
12579
12580 /* __tls_get_addr calls might be eliminated. */
12581 if (stub_type != ppc_stub_plt_call
12582 && hash != NULL
12583 && (hash == htab->tls_get_addr
12584 || hash == htab->tls_get_addr_fd)
12585 && section->has_tls_reloc
12586 && irela != internal_relocs)
12587 {
12588 /* Get tls info. */
12589 unsigned char *tls_mask;
12590
12591 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12592 irela - 1, input_bfd))
12593 goto error_ret_free_internal;
12594 if (*tls_mask != 0)
12595 continue;
12596 }
12597
12598 if (stub_type == ppc_stub_plt_call
12599 && irela + 1 < irelaend
12600 && irela[1].r_offset == irela->r_offset + 4
12601 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12602 {
12603 if (!tocsave_find (htab, INSERT,
12604 &local_syms, irela + 1, input_bfd))
12605 goto error_ret_free_internal;
12606 }
12607 else if (stub_type == ppc_stub_plt_call)
12608 stub_type = ppc_stub_plt_call_r2save;
12609
12610 /* Support for grouping stub sections. */
12611 id_sec = htab->sec_info[section->id].u.group->link_sec;
12612
12613 /* Get the name of this stub. */
12614 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12615 if (!stub_name)
12616 goto error_ret_free_internal;
12617
12618 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12619 stub_name, FALSE, FALSE);
12620 if (stub_entry != NULL)
12621 {
12622 /* The proper stub has already been created. */
12623 free (stub_name);
12624 if (stub_type == ppc_stub_plt_call_r2save)
12625 stub_entry->stub_type = stub_type;
12626 continue;
12627 }
12628
12629 stub_entry = ppc_add_stub (stub_name, section, info);
12630 if (stub_entry == NULL)
12631 {
12632 free (stub_name);
12633 error_ret_free_internal:
12634 if (elf_section_data (section)->relocs == NULL)
12635 free (internal_relocs);
12636 error_ret_free_local:
12637 if (local_syms != NULL
12638 && (symtab_hdr->contents
12639 != (unsigned char *) local_syms))
12640 free (local_syms);
12641 return FALSE;
12642 }
12643
12644 stub_entry->stub_type = stub_type;
12645 if (stub_type != ppc_stub_plt_call
12646 && stub_type != ppc_stub_plt_call_r2save)
12647 {
12648 stub_entry->target_value = code_value;
12649 stub_entry->target_section = code_sec;
12650 }
12651 else
12652 {
12653 stub_entry->target_value = sym_value;
12654 stub_entry->target_section = sym_sec;
12655 }
12656 stub_entry->h = hash;
12657 stub_entry->plt_ent = plt_ent;
12658 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12659
12660 if (stub_entry->h != NULL)
12661 htab->stub_globals += 1;
12662 }
12663
12664 /* We're done with the internal relocs, free them. */
12665 if (elf_section_data (section)->relocs != internal_relocs)
12666 free (internal_relocs);
12667 }
12668
12669 if (local_syms != NULL
12670 && symtab_hdr->contents != (unsigned char *) local_syms)
12671 {
12672 if (!info->keep_memory)
12673 free (local_syms);
12674 else
12675 symtab_hdr->contents = (unsigned char *) local_syms;
12676 }
12677 }
12678
12679 /* We may have added some stubs. Find out the new size of the
12680 stub sections. */
12681 for (stub_sec = htab->params->stub_bfd->sections;
12682 stub_sec != NULL;
12683 stub_sec = stub_sec->next)
12684 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12685 {
12686 if (htab->stub_iteration <= STUB_SHRINK_ITER
12687 || stub_sec->rawsize < stub_sec->size)
12688 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12689 stub_sec->rawsize = stub_sec->size;
12690 stub_sec->size = 0;
12691 stub_sec->reloc_count = 0;
12692 stub_sec->flags &= ~SEC_RELOC;
12693 }
12694
12695 htab->brlt->size = 0;
12696 htab->brlt->reloc_count = 0;
12697 htab->brlt->flags &= ~SEC_RELOC;
12698 if (htab->relbrlt != NULL)
12699 htab->relbrlt->size = 0;
12700
12701 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12702
12703 for (group = htab->group; group != NULL; group = group->next)
12704 if (group->needs_save_res)
12705 group->stub_sec->size += htab->sfpr->size;
12706
12707 if (info->emitrelocations
12708 && htab->glink != NULL && htab->glink->size != 0)
12709 {
12710 htab->glink->reloc_count = 1;
12711 htab->glink->flags |= SEC_RELOC;
12712 }
12713
12714 if (htab->glink_eh_frame != NULL
12715 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12716 && htab->glink_eh_frame->output_section->size != 0)
12717 {
12718 size_t size = 0, align = 4;
12719
12720 for (stub_sec = htab->params->stub_bfd->sections;
12721 stub_sec != NULL;
12722 stub_sec = stub_sec->next)
12723 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12724 size += (17 + align - 1) & -align;
12725 if (htab->glink != NULL && htab->glink->size != 0)
12726 size += (24 + align - 1) & -align;
12727 if (size != 0)
12728 size += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
12729 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12730 size = (size + align - 1) & -align;
12731 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12732 htab->glink_eh_frame->size = size;
12733 }
12734
12735 if (htab->params->plt_stub_align != 0)
12736 for (stub_sec = htab->params->stub_bfd->sections;
12737 stub_sec != NULL;
12738 stub_sec = stub_sec->next)
12739 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12740 stub_sec->size = ((stub_sec->size
12741 + (1 << htab->params->plt_stub_align) - 1)
12742 & -(1 << htab->params->plt_stub_align));
12743
12744 for (stub_sec = htab->params->stub_bfd->sections;
12745 stub_sec != NULL;
12746 stub_sec = stub_sec->next)
12747 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12748 && stub_sec->rawsize != stub_sec->size
12749 && (htab->stub_iteration <= STUB_SHRINK_ITER
12750 || stub_sec->rawsize < stub_sec->size))
12751 break;
12752
12753 if (stub_sec == NULL
12754 && (htab->glink_eh_frame == NULL
12755 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12756 break;
12757
12758 /* Ask the linker to do its stuff. */
12759 (*htab->params->layout_sections_again) ();
12760 }
12761
12762 if (htab->glink_eh_frame != NULL
12763 && htab->glink_eh_frame->size != 0)
12764 {
12765 bfd_vma val;
12766 bfd_byte *p, *last_fde;
12767 size_t last_fde_len, size, align, pad;
12768 asection *stub_sec;
12769
12770 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12771 if (p == NULL)
12772 return FALSE;
12773 htab->glink_eh_frame->contents = p;
12774 last_fde = p;
12775 align = 4;
12776
12777 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12778 /* CIE length (rewrite in case little-endian). */
12779 last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4;
12780 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12781 p += last_fde_len + 4;
12782
12783 for (stub_sec = htab->params->stub_bfd->sections;
12784 stub_sec != NULL;
12785 stub_sec = stub_sec->next)
12786 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12787 {
12788 last_fde = p;
12789 last_fde_len = ((17 + align - 1) & -align) - 4;
12790 /* FDE length. */
12791 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12792 p += 4;
12793 /* CIE pointer. */
12794 val = p - htab->glink_eh_frame->contents;
12795 bfd_put_32 (htab->elf.dynobj, val, p);
12796 p += 4;
12797 /* Offset to stub section, written later. */
12798 p += 4;
12799 /* stub section size. */
12800 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12801 p += 4;
12802 /* Augmentation. */
12803 p += 1;
12804 /* Pad. */
12805 p += ((17 + align - 1) & -align) - 17;
12806 }
12807 if (htab->glink != NULL && htab->glink->size != 0)
12808 {
12809 last_fde = p;
12810 last_fde_len = ((24 + align - 1) & -align) - 4;
12811 /* FDE length. */
12812 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12813 p += 4;
12814 /* CIE pointer. */
12815 val = p - htab->glink_eh_frame->contents;
12816 bfd_put_32 (htab->elf.dynobj, val, p);
12817 p += 4;
12818 /* Offset to .glink, written later. */
12819 p += 4;
12820 /* .glink size. */
12821 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12822 p += 4;
12823 /* Augmentation. */
12824 p += 1;
12825
12826 *p++ = DW_CFA_advance_loc + 1;
12827 *p++ = DW_CFA_register;
12828 *p++ = 65;
12829 *p++ = htab->opd_abi ? 12 : 0;
12830 *p++ = DW_CFA_advance_loc + 4;
12831 *p++ = DW_CFA_restore_extended;
12832 *p++ = 65;
12833 p += ((24 + align - 1) & -align) - 24;
12834 }
12835 /* Subsume any padding into the last FDE if user .eh_frame
12836 sections are aligned more than glink_eh_frame. Otherwise any
12837 zero padding will be seen as a terminator. */
12838 align = 1ul << htab->glink_eh_frame->output_section->alignment_power;
12839 size = p - htab->glink_eh_frame->contents;
12840 pad = ((size + align - 1) & -align) - size;
12841 htab->glink_eh_frame->size = size + pad;
12842 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12843 }
12844
12845 maybe_strip_output (info, htab->brlt);
12846 if (htab->glink_eh_frame != NULL)
12847 maybe_strip_output (info, htab->glink_eh_frame);
12848
12849 return TRUE;
12850 }
12851
12852 /* Called after we have determined section placement. If sections
12853 move, we'll be called again. Provide a value for TOCstart. */
12854
12855 bfd_vma
12856 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12857 {
12858 asection *s;
12859 bfd_vma TOCstart, adjust;
12860
12861 if (info != NULL)
12862 {
12863 struct elf_link_hash_entry *h;
12864 struct elf_link_hash_table *htab = elf_hash_table (info);
12865
12866 if (is_elf_hash_table (htab)
12867 && htab->hgot != NULL)
12868 h = htab->hgot;
12869 else
12870 {
12871 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12872 if (is_elf_hash_table (htab))
12873 htab->hgot = h;
12874 }
12875 if (h != NULL
12876 && h->root.type == bfd_link_hash_defined
12877 && !h->root.linker_def
12878 && (!is_elf_hash_table (htab)
12879 || h->def_regular))
12880 {
12881 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12882 + h->root.u.def.section->output_offset
12883 + h->root.u.def.section->output_section->vma);
12884 _bfd_set_gp_value (obfd, TOCstart);
12885 return TOCstart;
12886 }
12887 }
12888
12889 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12890 order. The TOC starts where the first of these sections starts. */
12891 s = bfd_get_section_by_name (obfd, ".got");
12892 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12893 s = bfd_get_section_by_name (obfd, ".toc");
12894 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12895 s = bfd_get_section_by_name (obfd, ".tocbss");
12896 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12897 s = bfd_get_section_by_name (obfd, ".plt");
12898 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12899 {
12900 /* This may happen for
12901 o references to TOC base (SYM@toc / TOC[tc0]) without a
12902 .toc directive
12903 o bad linker script
12904 o --gc-sections and empty TOC sections
12905
12906 FIXME: Warn user? */
12907
12908 /* Look for a likely section. We probably won't even be
12909 using TOCstart. */
12910 for (s = obfd->sections; s != NULL; s = s->next)
12911 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12912 | SEC_EXCLUDE))
12913 == (SEC_ALLOC | SEC_SMALL_DATA))
12914 break;
12915 if (s == NULL)
12916 for (s = obfd->sections; s != NULL; s = s->next)
12917 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12918 == (SEC_ALLOC | SEC_SMALL_DATA))
12919 break;
12920 if (s == NULL)
12921 for (s = obfd->sections; s != NULL; s = s->next)
12922 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12923 == SEC_ALLOC)
12924 break;
12925 if (s == NULL)
12926 for (s = obfd->sections; s != NULL; s = s->next)
12927 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12928 break;
12929 }
12930
12931 TOCstart = 0;
12932 if (s != NULL)
12933 TOCstart = s->output_section->vma + s->output_offset;
12934
12935 /* Force alignment. */
12936 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12937 TOCstart -= adjust;
12938 _bfd_set_gp_value (obfd, TOCstart);
12939
12940 if (info != NULL && s != NULL)
12941 {
12942 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12943
12944 if (htab != NULL)
12945 {
12946 if (htab->elf.hgot != NULL)
12947 {
12948 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12949 htab->elf.hgot->root.u.def.section = s;
12950 }
12951 }
12952 else
12953 {
12954 struct bfd_link_hash_entry *bh = NULL;
12955 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12956 s, TOC_BASE_OFF - adjust,
12957 NULL, FALSE, FALSE, &bh);
12958 }
12959 }
12960 return TOCstart;
12961 }
12962
12963 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12964 write out any global entry stubs. */
12965
12966 static bfd_boolean
12967 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12968 {
12969 struct bfd_link_info *info;
12970 struct ppc_link_hash_table *htab;
12971 struct plt_entry *pent;
12972 asection *s;
12973
12974 if (h->root.type == bfd_link_hash_indirect)
12975 return TRUE;
12976
12977 if (!h->pointer_equality_needed)
12978 return TRUE;
12979
12980 if (h->def_regular)
12981 return TRUE;
12982
12983 info = inf;
12984 htab = ppc_hash_table (info);
12985 if (htab == NULL)
12986 return FALSE;
12987
12988 s = htab->glink;
12989 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12990 if (pent->plt.offset != (bfd_vma) -1
12991 && pent->addend == 0)
12992 {
12993 bfd_byte *p;
12994 asection *plt;
12995 bfd_vma off;
12996
12997 p = s->contents + h->root.u.def.value;
12998 plt = htab->elf.splt;
12999 if (!htab->elf.dynamic_sections_created
13000 || h->dynindx == -1)
13001 plt = htab->elf.iplt;
13002 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
13003 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
13004
13005 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
13006 {
13007 info->callbacks->einfo
13008 (_("%P: linkage table error against `%T'\n"),
13009 h->root.root.string);
13010 bfd_set_error (bfd_error_bad_value);
13011 htab->stub_error = TRUE;
13012 }
13013
13014 htab->stub_count[ppc_stub_global_entry - 1] += 1;
13015 if (htab->params->emit_stub_syms)
13016 {
13017 size_t len = strlen (h->root.root.string);
13018 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
13019
13020 if (name == NULL)
13021 return FALSE;
13022
13023 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
13024 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
13025 if (h == NULL)
13026 return FALSE;
13027 if (h->root.type == bfd_link_hash_new)
13028 {
13029 h->root.type = bfd_link_hash_defined;
13030 h->root.u.def.section = s;
13031 h->root.u.def.value = p - s->contents;
13032 h->ref_regular = 1;
13033 h->def_regular = 1;
13034 h->ref_regular_nonweak = 1;
13035 h->forced_local = 1;
13036 h->non_elf = 0;
13037 h->root.linker_def = 1;
13038 }
13039 }
13040
13041 if (PPC_HA (off) != 0)
13042 {
13043 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
13044 p += 4;
13045 }
13046 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
13047 p += 4;
13048 bfd_put_32 (s->owner, MTCTR_R12, p);
13049 p += 4;
13050 bfd_put_32 (s->owner, BCTR, p);
13051 break;
13052 }
13053 return TRUE;
13054 }
13055
13056 /* Build all the stubs associated with the current output file.
13057 The stubs are kept in a hash table attached to the main linker
13058 hash table. This function is called via gldelf64ppc_finish. */
13059
13060 bfd_boolean
13061 ppc64_elf_build_stubs (struct bfd_link_info *info,
13062 char **stats)
13063 {
13064 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13065 struct map_stub *group;
13066 asection *stub_sec;
13067 bfd_byte *p;
13068 int stub_sec_count = 0;
13069
13070 if (htab == NULL)
13071 return FALSE;
13072
13073 /* Allocate memory to hold the linker stubs. */
13074 for (stub_sec = htab->params->stub_bfd->sections;
13075 stub_sec != NULL;
13076 stub_sec = stub_sec->next)
13077 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
13078 && stub_sec->size != 0)
13079 {
13080 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13081 if (stub_sec->contents == NULL)
13082 return FALSE;
13083 stub_sec->size = 0;
13084 }
13085
13086 if (htab->glink != NULL && htab->glink->size != 0)
13087 {
13088 unsigned int indx;
13089 bfd_vma plt0;
13090
13091 /* Build the .glink plt call stub. */
13092 if (htab->params->emit_stub_syms)
13093 {
13094 struct elf_link_hash_entry *h;
13095 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13096 TRUE, FALSE, FALSE);
13097 if (h == NULL)
13098 return FALSE;
13099 if (h->root.type == bfd_link_hash_new)
13100 {
13101 h->root.type = bfd_link_hash_defined;
13102 h->root.u.def.section = htab->glink;
13103 h->root.u.def.value = 8;
13104 h->ref_regular = 1;
13105 h->def_regular = 1;
13106 h->ref_regular_nonweak = 1;
13107 h->forced_local = 1;
13108 h->non_elf = 0;
13109 h->root.linker_def = 1;
13110 }
13111 }
13112 plt0 = (htab->elf.splt->output_section->vma
13113 + htab->elf.splt->output_offset
13114 - 16);
13115 if (info->emitrelocations)
13116 {
13117 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13118 if (r == NULL)
13119 return FALSE;
13120 r->r_offset = (htab->glink->output_offset
13121 + htab->glink->output_section->vma);
13122 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13123 r->r_addend = plt0;
13124 }
13125 p = htab->glink->contents;
13126 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13127 bfd_put_64 (htab->glink->owner, plt0, p);
13128 p += 8;
13129 if (htab->opd_abi)
13130 {
13131 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13132 p += 4;
13133 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13134 p += 4;
13135 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13136 p += 4;
13137 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13138 p += 4;
13139 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13140 p += 4;
13141 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13142 p += 4;
13143 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13144 p += 4;
13145 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13146 p += 4;
13147 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13148 p += 4;
13149 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13150 p += 4;
13151 }
13152 else
13153 {
13154 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13155 p += 4;
13156 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13157 p += 4;
13158 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13159 p += 4;
13160 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13161 p += 4;
13162 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13163 p += 4;
13164 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13165 p += 4;
13166 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13167 p += 4;
13168 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13169 p += 4;
13170 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13171 p += 4;
13172 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13173 p += 4;
13174 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13175 p += 4;
13176 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13177 p += 4;
13178 }
13179 bfd_put_32 (htab->glink->owner, BCTR, p);
13180 p += 4;
13181 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13182 {
13183 bfd_put_32 (htab->glink->owner, NOP, p);
13184 p += 4;
13185 }
13186
13187 /* Build the .glink lazy link call stubs. */
13188 indx = 0;
13189 while (p < htab->glink->contents + htab->glink->rawsize)
13190 {
13191 if (htab->opd_abi)
13192 {
13193 if (indx < 0x8000)
13194 {
13195 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13196 p += 4;
13197 }
13198 else
13199 {
13200 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13201 p += 4;
13202 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13203 p);
13204 p += 4;
13205 }
13206 }
13207 bfd_put_32 (htab->glink->owner,
13208 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13209 indx++;
13210 p += 4;
13211 }
13212
13213 /* Build .glink global entry stubs. */
13214 if (htab->glink->size > htab->glink->rawsize)
13215 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13216 }
13217
13218 if (htab->brlt != NULL && htab->brlt->size != 0)
13219 {
13220 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13221 htab->brlt->size);
13222 if (htab->brlt->contents == NULL)
13223 return FALSE;
13224 }
13225 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13226 {
13227 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13228 htab->relbrlt->size);
13229 if (htab->relbrlt->contents == NULL)
13230 return FALSE;
13231 }
13232
13233 /* Build the stubs as directed by the stub hash table. */
13234 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13235
13236 for (group = htab->group; group != NULL; group = group->next)
13237 if (group->needs_save_res)
13238 {
13239 stub_sec = group->stub_sec;
13240 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13241 htab->sfpr->size);
13242 if (htab->params->emit_stub_syms)
13243 {
13244 unsigned int i;
13245
13246 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13247 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13248 return FALSE;
13249 }
13250 stub_sec->size += htab->sfpr->size;
13251 }
13252
13253 if (htab->relbrlt != NULL)
13254 htab->relbrlt->reloc_count = 0;
13255
13256 if (htab->params->plt_stub_align != 0)
13257 for (stub_sec = htab->params->stub_bfd->sections;
13258 stub_sec != NULL;
13259 stub_sec = stub_sec->next)
13260 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13261 stub_sec->size = ((stub_sec->size
13262 + (1 << htab->params->plt_stub_align) - 1)
13263 & -(1 << htab->params->plt_stub_align));
13264
13265 for (stub_sec = htab->params->stub_bfd->sections;
13266 stub_sec != NULL;
13267 stub_sec = stub_sec->next)
13268 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13269 {
13270 stub_sec_count += 1;
13271 if (stub_sec->rawsize != stub_sec->size
13272 && (htab->stub_iteration <= STUB_SHRINK_ITER
13273 || stub_sec->rawsize < stub_sec->size))
13274 break;
13275 }
13276
13277 /* Note that the glink_eh_frame check here is not only testing that
13278 the generated size matched the calculated size but also that
13279 bfd_elf_discard_info didn't make any changes to the section. */
13280 if (stub_sec != NULL
13281 || (htab->glink_eh_frame != NULL
13282 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13283 {
13284 htab->stub_error = TRUE;
13285 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13286 }
13287
13288 if (htab->stub_error)
13289 return FALSE;
13290
13291 if (stats != NULL)
13292 {
13293 *stats = bfd_malloc (500);
13294 if (*stats == NULL)
13295 return FALSE;
13296
13297 sprintf (*stats, _("linker stubs in %u group%s\n"
13298 " branch %lu\n"
13299 " toc adjust %lu\n"
13300 " long branch %lu\n"
13301 " long toc adj %lu\n"
13302 " plt call %lu\n"
13303 " plt call toc %lu\n"
13304 " global entry %lu"),
13305 stub_sec_count,
13306 stub_sec_count == 1 ? "" : "s",
13307 htab->stub_count[ppc_stub_long_branch - 1],
13308 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13309 htab->stub_count[ppc_stub_plt_branch - 1],
13310 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13311 htab->stub_count[ppc_stub_plt_call - 1],
13312 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13313 htab->stub_count[ppc_stub_global_entry - 1]);
13314 }
13315 return TRUE;
13316 }
13317
13318 /* What to do when ld finds relocations against symbols defined in
13319 discarded sections. */
13320
13321 static unsigned int
13322 ppc64_elf_action_discarded (asection *sec)
13323 {
13324 if (strcmp (".opd", sec->name) == 0)
13325 return 0;
13326
13327 if (strcmp (".toc", sec->name) == 0)
13328 return 0;
13329
13330 if (strcmp (".toc1", sec->name) == 0)
13331 return 0;
13332
13333 return _bfd_elf_default_action_discarded (sec);
13334 }
13335
13336 /* The RELOCATE_SECTION function is called by the ELF backend linker
13337 to handle the relocations for a section.
13338
13339 The relocs are always passed as Rela structures; if the section
13340 actually uses Rel structures, the r_addend field will always be
13341 zero.
13342
13343 This function is responsible for adjust the section contents as
13344 necessary, and (if using Rela relocs and generating a
13345 relocatable output file) adjusting the reloc addend as
13346 necessary.
13347
13348 This function does not have to worry about setting the reloc
13349 address or the reloc symbol index.
13350
13351 LOCAL_SYMS is a pointer to the swapped in local symbols.
13352
13353 LOCAL_SECTIONS is an array giving the section in the input file
13354 corresponding to the st_shndx field of each local symbol.
13355
13356 The global hash table entry for the global symbols can be found
13357 via elf_sym_hashes (input_bfd).
13358
13359 When generating relocatable output, this function must handle
13360 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13361 going to be the section symbol corresponding to the output
13362 section, which means that the addend must be adjusted
13363 accordingly. */
13364
13365 static bfd_boolean
13366 ppc64_elf_relocate_section (bfd *output_bfd,
13367 struct bfd_link_info *info,
13368 bfd *input_bfd,
13369 asection *input_section,
13370 bfd_byte *contents,
13371 Elf_Internal_Rela *relocs,
13372 Elf_Internal_Sym *local_syms,
13373 asection **local_sections)
13374 {
13375 struct ppc_link_hash_table *htab;
13376 Elf_Internal_Shdr *symtab_hdr;
13377 struct elf_link_hash_entry **sym_hashes;
13378 Elf_Internal_Rela *rel;
13379 Elf_Internal_Rela *wrel;
13380 Elf_Internal_Rela *relend;
13381 Elf_Internal_Rela outrel;
13382 bfd_byte *loc;
13383 struct got_entry **local_got_ents;
13384 bfd_vma TOCstart;
13385 bfd_boolean ret = TRUE;
13386 bfd_boolean is_opd;
13387 /* Assume 'at' branch hints. */
13388 bfd_boolean is_isa_v2 = TRUE;
13389 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13390
13391 /* Initialize howto table if needed. */
13392 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13393 ppc_howto_init ();
13394
13395 htab = ppc_hash_table (info);
13396 if (htab == NULL)
13397 return FALSE;
13398
13399 /* Don't relocate stub sections. */
13400 if (input_section->owner == htab->params->stub_bfd)
13401 return TRUE;
13402
13403 BFD_ASSERT (is_ppc64_elf (input_bfd));
13404
13405 local_got_ents = elf_local_got_ents (input_bfd);
13406 TOCstart = elf_gp (output_bfd);
13407 symtab_hdr = &elf_symtab_hdr (input_bfd);
13408 sym_hashes = elf_sym_hashes (input_bfd);
13409 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13410
13411 rel = wrel = relocs;
13412 relend = relocs + input_section->reloc_count;
13413 for (; rel < relend; wrel++, rel++)
13414 {
13415 enum elf_ppc64_reloc_type r_type;
13416 bfd_vma addend;
13417 bfd_reloc_status_type r;
13418 Elf_Internal_Sym *sym;
13419 asection *sec;
13420 struct elf_link_hash_entry *h_elf;
13421 struct ppc_link_hash_entry *h;
13422 struct ppc_link_hash_entry *fdh;
13423 const char *sym_name;
13424 unsigned long r_symndx, toc_symndx;
13425 bfd_vma toc_addend;
13426 unsigned char tls_mask, tls_gd, tls_type;
13427 unsigned char sym_type;
13428 bfd_vma relocation;
13429 bfd_boolean unresolved_reloc;
13430 bfd_boolean warned;
13431 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13432 unsigned int insn;
13433 unsigned int mask;
13434 struct ppc_stub_hash_entry *stub_entry;
13435 bfd_vma max_br_offset;
13436 bfd_vma from;
13437 Elf_Internal_Rela orig_rel;
13438 reloc_howto_type *howto;
13439 struct reloc_howto_struct alt_howto;
13440
13441 again:
13442 orig_rel = *rel;
13443
13444 r_type = ELF64_R_TYPE (rel->r_info);
13445 r_symndx = ELF64_R_SYM (rel->r_info);
13446
13447 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13448 symbol of the previous ADDR64 reloc. The symbol gives us the
13449 proper TOC base to use. */
13450 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13451 && wrel != relocs
13452 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13453 && is_opd)
13454 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13455
13456 sym = NULL;
13457 sec = NULL;
13458 h_elf = NULL;
13459 sym_name = NULL;
13460 unresolved_reloc = FALSE;
13461 warned = FALSE;
13462
13463 if (r_symndx < symtab_hdr->sh_info)
13464 {
13465 /* It's a local symbol. */
13466 struct _opd_sec_data *opd;
13467
13468 sym = local_syms + r_symndx;
13469 sec = local_sections[r_symndx];
13470 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13471 sym_type = ELF64_ST_TYPE (sym->st_info);
13472 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13473 opd = get_opd_info (sec);
13474 if (opd != NULL && opd->adjust != NULL)
13475 {
13476 long adjust = opd->adjust[OPD_NDX (sym->st_value
13477 + rel->r_addend)];
13478 if (adjust == -1)
13479 relocation = 0;
13480 else
13481 {
13482 /* If this is a relocation against the opd section sym
13483 and we have edited .opd, adjust the reloc addend so
13484 that ld -r and ld --emit-relocs output is correct.
13485 If it is a reloc against some other .opd symbol,
13486 then the symbol value will be adjusted later. */
13487 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13488 rel->r_addend += adjust;
13489 else
13490 relocation += adjust;
13491 }
13492 }
13493 }
13494 else
13495 {
13496 bfd_boolean ignored;
13497
13498 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13499 r_symndx, symtab_hdr, sym_hashes,
13500 h_elf, sec, relocation,
13501 unresolved_reloc, warned, ignored);
13502 sym_name = h_elf->root.root.string;
13503 sym_type = h_elf->type;
13504 if (sec != NULL
13505 && sec->owner == output_bfd
13506 && strcmp (sec->name, ".opd") == 0)
13507 {
13508 /* This is a symbol defined in a linker script. All
13509 such are defined in output sections, even those
13510 defined by simple assignment from a symbol defined in
13511 an input section. Transfer the symbol to an
13512 appropriate input .opd section, so that a branch to
13513 this symbol will be mapped to the location specified
13514 by the opd entry. */
13515 struct bfd_link_order *lo;
13516 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13517 if (lo->type == bfd_indirect_link_order)
13518 {
13519 asection *isec = lo->u.indirect.section;
13520 if (h_elf->root.u.def.value >= isec->output_offset
13521 && h_elf->root.u.def.value < (isec->output_offset
13522 + isec->size))
13523 {
13524 h_elf->root.u.def.value -= isec->output_offset;
13525 h_elf->root.u.def.section = isec;
13526 sec = isec;
13527 break;
13528 }
13529 }
13530 }
13531 }
13532 h = (struct ppc_link_hash_entry *) h_elf;
13533
13534 if (sec != NULL && discarded_section (sec))
13535 {
13536 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13537 input_bfd, input_section,
13538 contents + rel->r_offset);
13539 wrel->r_offset = rel->r_offset;
13540 wrel->r_info = 0;
13541 wrel->r_addend = 0;
13542
13543 /* For ld -r, remove relocations in debug sections against
13544 sections defined in discarded sections. Not done for
13545 non-debug to preserve relocs in .eh_frame which the
13546 eh_frame editing code expects to be present. */
13547 if (bfd_link_relocatable (info)
13548 && (input_section->flags & SEC_DEBUGGING))
13549 wrel--;
13550
13551 continue;
13552 }
13553
13554 if (bfd_link_relocatable (info))
13555 goto copy_reloc;
13556
13557 if (h != NULL && &h->elf == htab->elf.hgot)
13558 {
13559 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13560 sec = bfd_abs_section_ptr;
13561 unresolved_reloc = FALSE;
13562 }
13563
13564 /* TLS optimizations. Replace instruction sequences and relocs
13565 based on information we collected in tls_optimize. We edit
13566 RELOCS so that --emit-relocs will output something sensible
13567 for the final instruction stream. */
13568 tls_mask = 0;
13569 tls_gd = 0;
13570 toc_symndx = 0;
13571 if (h != NULL)
13572 tls_mask = h->tls_mask;
13573 else if (local_got_ents != NULL)
13574 {
13575 struct plt_entry **local_plt = (struct plt_entry **)
13576 (local_got_ents + symtab_hdr->sh_info);
13577 unsigned char *lgot_masks = (unsigned char *)
13578 (local_plt + symtab_hdr->sh_info);
13579 tls_mask = lgot_masks[r_symndx];
13580 }
13581 if (tls_mask == 0
13582 && (r_type == R_PPC64_TLS
13583 || r_type == R_PPC64_TLSGD
13584 || r_type == R_PPC64_TLSLD))
13585 {
13586 /* Check for toc tls entries. */
13587 unsigned char *toc_tls;
13588
13589 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13590 &local_syms, rel, input_bfd))
13591 return FALSE;
13592
13593 if (toc_tls)
13594 tls_mask = *toc_tls;
13595 }
13596
13597 /* Check that tls relocs are used with tls syms, and non-tls
13598 relocs are used with non-tls syms. */
13599 if (r_symndx != STN_UNDEF
13600 && r_type != R_PPC64_NONE
13601 && (h == NULL
13602 || h->elf.root.type == bfd_link_hash_defined
13603 || h->elf.root.type == bfd_link_hash_defweak)
13604 && (IS_PPC64_TLS_RELOC (r_type)
13605 != (sym_type == STT_TLS
13606 || (sym_type == STT_SECTION
13607 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13608 {
13609 if (tls_mask != 0
13610 && (r_type == R_PPC64_TLS
13611 || r_type == R_PPC64_TLSGD
13612 || r_type == R_PPC64_TLSLD))
13613 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13614 ;
13615 else
13616 info->callbacks->einfo
13617 (!IS_PPC64_TLS_RELOC (r_type)
13618 /* xgettext:c-format */
13619 ? _("%H: %s used with TLS symbol `%T'\n")
13620 /* xgettext:c-format */
13621 : _("%H: %s used with non-TLS symbol `%T'\n"),
13622 input_bfd, input_section, rel->r_offset,
13623 ppc64_elf_howto_table[r_type]->name,
13624 sym_name);
13625 }
13626
13627 /* Ensure reloc mapping code below stays sane. */
13628 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13629 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13630 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13631 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13632 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13633 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13634 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13635 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13636 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13637 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13638 abort ();
13639
13640 switch (r_type)
13641 {
13642 default:
13643 break;
13644
13645 case R_PPC64_LO_DS_OPT:
13646 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13647 if ((insn & (0x3f << 26)) != 58u << 26)
13648 abort ();
13649 insn += (14u << 26) - (58u << 26);
13650 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13651 r_type = R_PPC64_TOC16_LO;
13652 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13653 break;
13654
13655 case R_PPC64_TOC16:
13656 case R_PPC64_TOC16_LO:
13657 case R_PPC64_TOC16_DS:
13658 case R_PPC64_TOC16_LO_DS:
13659 {
13660 /* Check for toc tls entries. */
13661 unsigned char *toc_tls;
13662 int retval;
13663
13664 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13665 &local_syms, rel, input_bfd);
13666 if (retval == 0)
13667 return FALSE;
13668
13669 if (toc_tls)
13670 {
13671 tls_mask = *toc_tls;
13672 if (r_type == R_PPC64_TOC16_DS
13673 || r_type == R_PPC64_TOC16_LO_DS)
13674 {
13675 if (tls_mask != 0
13676 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13677 goto toctprel;
13678 }
13679 else
13680 {
13681 /* If we found a GD reloc pair, then we might be
13682 doing a GD->IE transition. */
13683 if (retval == 2)
13684 {
13685 tls_gd = TLS_TPRELGD;
13686 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13687 goto tls_ldgd_opt;
13688 }
13689 else if (retval == 3)
13690 {
13691 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13692 goto tls_ldgd_opt;
13693 }
13694 }
13695 }
13696 }
13697 break;
13698
13699 case R_PPC64_GOT_TPREL16_HI:
13700 case R_PPC64_GOT_TPREL16_HA:
13701 if (tls_mask != 0
13702 && (tls_mask & TLS_TPREL) == 0)
13703 {
13704 rel->r_offset -= d_offset;
13705 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13706 r_type = R_PPC64_NONE;
13707 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13708 }
13709 break;
13710
13711 case R_PPC64_GOT_TPREL16_DS:
13712 case R_PPC64_GOT_TPREL16_LO_DS:
13713 if (tls_mask != 0
13714 && (tls_mask & TLS_TPREL) == 0)
13715 {
13716 toctprel:
13717 insn = bfd_get_32 (input_bfd,
13718 contents + rel->r_offset - d_offset);
13719 insn &= 31 << 21;
13720 insn |= 0x3c0d0000; /* addis 0,13,0 */
13721 bfd_put_32 (input_bfd, insn,
13722 contents + rel->r_offset - d_offset);
13723 r_type = R_PPC64_TPREL16_HA;
13724 if (toc_symndx != 0)
13725 {
13726 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13727 rel->r_addend = toc_addend;
13728 /* We changed the symbol. Start over in order to
13729 get h, sym, sec etc. right. */
13730 goto again;
13731 }
13732 else
13733 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13734 }
13735 break;
13736
13737 case R_PPC64_TLS:
13738 if (tls_mask != 0
13739 && (tls_mask & TLS_TPREL) == 0)
13740 {
13741 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13742 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13743 if (insn == 0)
13744 abort ();
13745 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13746 /* Was PPC64_TLS which sits on insn boundary, now
13747 PPC64_TPREL16_LO which is at low-order half-word. */
13748 rel->r_offset += d_offset;
13749 r_type = R_PPC64_TPREL16_LO;
13750 if (toc_symndx != 0)
13751 {
13752 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13753 rel->r_addend = toc_addend;
13754 /* We changed the symbol. Start over in order to
13755 get h, sym, sec etc. right. */
13756 goto again;
13757 }
13758 else
13759 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13760 }
13761 break;
13762
13763 case R_PPC64_GOT_TLSGD16_HI:
13764 case R_PPC64_GOT_TLSGD16_HA:
13765 tls_gd = TLS_TPRELGD;
13766 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13767 goto tls_gdld_hi;
13768 break;
13769
13770 case R_PPC64_GOT_TLSLD16_HI:
13771 case R_PPC64_GOT_TLSLD16_HA:
13772 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13773 {
13774 tls_gdld_hi:
13775 if ((tls_mask & tls_gd) != 0)
13776 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13777 + R_PPC64_GOT_TPREL16_DS);
13778 else
13779 {
13780 rel->r_offset -= d_offset;
13781 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13782 r_type = R_PPC64_NONE;
13783 }
13784 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13785 }
13786 break;
13787
13788 case R_PPC64_GOT_TLSGD16:
13789 case R_PPC64_GOT_TLSGD16_LO:
13790 tls_gd = TLS_TPRELGD;
13791 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13792 goto tls_ldgd_opt;
13793 break;
13794
13795 case R_PPC64_GOT_TLSLD16:
13796 case R_PPC64_GOT_TLSLD16_LO:
13797 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13798 {
13799 unsigned int insn1, insn2, insn3;
13800 bfd_vma offset;
13801
13802 tls_ldgd_opt:
13803 offset = (bfd_vma) -1;
13804 /* If not using the newer R_PPC64_TLSGD/LD to mark
13805 __tls_get_addr calls, we must trust that the call
13806 stays with its arg setup insns, ie. that the next
13807 reloc is the __tls_get_addr call associated with
13808 the current reloc. Edit both insns. */
13809 if (input_section->has_tls_get_addr_call
13810 && rel + 1 < relend
13811 && branch_reloc_hash_match (input_bfd, rel + 1,
13812 htab->tls_get_addr,
13813 htab->tls_get_addr_fd))
13814 offset = rel[1].r_offset;
13815 /* We read the low GOT_TLS (or TOC16) insn because we
13816 need to keep the destination reg. It may be
13817 something other than the usual r3, and moved to r3
13818 before the call by intervening code. */
13819 insn1 = bfd_get_32 (input_bfd,
13820 contents + rel->r_offset - d_offset);
13821 if ((tls_mask & tls_gd) != 0)
13822 {
13823 /* IE */
13824 insn1 &= (0x1f << 21) | (0x1f << 16);
13825 insn1 |= 58 << 26; /* ld */
13826 insn2 = 0x7c636a14; /* add 3,3,13 */
13827 if (offset != (bfd_vma) -1)
13828 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13829 if ((tls_mask & TLS_EXPLICIT) == 0)
13830 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13831 + R_PPC64_GOT_TPREL16_DS);
13832 else
13833 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13834 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13835 }
13836 else
13837 {
13838 /* LE */
13839 insn1 &= 0x1f << 21;
13840 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13841 insn2 = 0x38630000; /* addi 3,3,0 */
13842 if (tls_gd == 0)
13843 {
13844 /* Was an LD reloc. */
13845 if (toc_symndx)
13846 sec = local_sections[toc_symndx];
13847 for (r_symndx = 0;
13848 r_symndx < symtab_hdr->sh_info;
13849 r_symndx++)
13850 if (local_sections[r_symndx] == sec)
13851 break;
13852 if (r_symndx >= symtab_hdr->sh_info)
13853 r_symndx = STN_UNDEF;
13854 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13855 if (r_symndx != STN_UNDEF)
13856 rel->r_addend -= (local_syms[r_symndx].st_value
13857 + sec->output_offset
13858 + sec->output_section->vma);
13859 }
13860 else if (toc_symndx != 0)
13861 {
13862 r_symndx = toc_symndx;
13863 rel->r_addend = toc_addend;
13864 }
13865 r_type = R_PPC64_TPREL16_HA;
13866 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13867 if (offset != (bfd_vma) -1)
13868 {
13869 rel[1].r_info = ELF64_R_INFO (r_symndx,
13870 R_PPC64_TPREL16_LO);
13871 rel[1].r_offset = offset + d_offset;
13872 rel[1].r_addend = rel->r_addend;
13873 }
13874 }
13875 bfd_put_32 (input_bfd, insn1,
13876 contents + rel->r_offset - d_offset);
13877 if (offset != (bfd_vma) -1)
13878 {
13879 insn3 = bfd_get_32 (input_bfd,
13880 contents + offset + 4);
13881 if (insn3 == NOP
13882 || insn3 == CROR_151515 || insn3 == CROR_313131)
13883 {
13884 rel[1].r_offset += 4;
13885 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13886 insn2 = NOP;
13887 }
13888 bfd_put_32 (input_bfd, insn2, contents + offset);
13889 }
13890 if ((tls_mask & tls_gd) == 0
13891 && (tls_gd == 0 || toc_symndx != 0))
13892 {
13893 /* We changed the symbol. Start over in order
13894 to get h, sym, sec etc. right. */
13895 goto again;
13896 }
13897 }
13898 break;
13899
13900 case R_PPC64_TLSGD:
13901 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13902 {
13903 unsigned int insn2, insn3;
13904 bfd_vma offset = rel->r_offset;
13905
13906 if ((tls_mask & TLS_TPRELGD) != 0)
13907 {
13908 /* IE */
13909 r_type = R_PPC64_NONE;
13910 insn2 = 0x7c636a14; /* add 3,3,13 */
13911 }
13912 else
13913 {
13914 /* LE */
13915 if (toc_symndx != 0)
13916 {
13917 r_symndx = toc_symndx;
13918 rel->r_addend = toc_addend;
13919 }
13920 r_type = R_PPC64_TPREL16_LO;
13921 rel->r_offset = offset + d_offset;
13922 insn2 = 0x38630000; /* addi 3,3,0 */
13923 }
13924 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13925 /* Zap the reloc on the _tls_get_addr call too. */
13926 BFD_ASSERT (offset == rel[1].r_offset);
13927 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13928 insn3 = bfd_get_32 (input_bfd,
13929 contents + offset + 4);
13930 if (insn3 == NOP
13931 || insn3 == CROR_151515 || insn3 == CROR_313131)
13932 {
13933 rel->r_offset += 4;
13934 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13935 insn2 = NOP;
13936 }
13937 bfd_put_32 (input_bfd, insn2, contents + offset);
13938 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13939 goto again;
13940 }
13941 break;
13942
13943 case R_PPC64_TLSLD:
13944 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13945 {
13946 unsigned int insn2, insn3;
13947 bfd_vma offset = rel->r_offset;
13948
13949 if (toc_symndx)
13950 sec = local_sections[toc_symndx];
13951 for (r_symndx = 0;
13952 r_symndx < symtab_hdr->sh_info;
13953 r_symndx++)
13954 if (local_sections[r_symndx] == sec)
13955 break;
13956 if (r_symndx >= symtab_hdr->sh_info)
13957 r_symndx = STN_UNDEF;
13958 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13959 if (r_symndx != STN_UNDEF)
13960 rel->r_addend -= (local_syms[r_symndx].st_value
13961 + sec->output_offset
13962 + sec->output_section->vma);
13963
13964 r_type = R_PPC64_TPREL16_LO;
13965 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13966 rel->r_offset = offset + d_offset;
13967 /* Zap the reloc on the _tls_get_addr call too. */
13968 BFD_ASSERT (offset == rel[1].r_offset);
13969 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13970 insn2 = 0x38630000; /* addi 3,3,0 */
13971 insn3 = bfd_get_32 (input_bfd,
13972 contents + offset + 4);
13973 if (insn3 == NOP
13974 || insn3 == CROR_151515 || insn3 == CROR_313131)
13975 {
13976 rel->r_offset += 4;
13977 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13978 insn2 = NOP;
13979 }
13980 bfd_put_32 (input_bfd, insn2, contents + offset);
13981 goto again;
13982 }
13983 break;
13984
13985 case R_PPC64_DTPMOD64:
13986 if (rel + 1 < relend
13987 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13988 && rel[1].r_offset == rel->r_offset + 8)
13989 {
13990 if ((tls_mask & TLS_GD) == 0)
13991 {
13992 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13993 if ((tls_mask & TLS_TPRELGD) != 0)
13994 r_type = R_PPC64_TPREL64;
13995 else
13996 {
13997 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13998 r_type = R_PPC64_NONE;
13999 }
14000 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14001 }
14002 }
14003 else
14004 {
14005 if ((tls_mask & TLS_LD) == 0)
14006 {
14007 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
14008 r_type = R_PPC64_NONE;
14009 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14010 }
14011 }
14012 break;
14013
14014 case R_PPC64_TPREL64:
14015 if ((tls_mask & TLS_TPREL) == 0)
14016 {
14017 r_type = R_PPC64_NONE;
14018 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14019 }
14020 break;
14021
14022 case R_PPC64_ENTRY:
14023 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
14024 if (!bfd_link_pic (info)
14025 && !info->traditional_format
14026 && relocation + 0x80008000 <= 0xffffffff)
14027 {
14028 unsigned int insn1, insn2;
14029
14030 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14031 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14032 if ((insn1 & ~0xfffc) == LD_R2_0R12
14033 && insn2 == ADD_R2_R2_R12)
14034 {
14035 bfd_put_32 (input_bfd,
14036 LIS_R2 + PPC_HA (relocation),
14037 contents + rel->r_offset);
14038 bfd_put_32 (input_bfd,
14039 ADDI_R2_R2 + PPC_LO (relocation),
14040 contents + rel->r_offset + 4);
14041 }
14042 }
14043 else
14044 {
14045 relocation -= (rel->r_offset
14046 + input_section->output_offset
14047 + input_section->output_section->vma);
14048 if (relocation + 0x80008000 <= 0xffffffff)
14049 {
14050 unsigned int insn1, insn2;
14051
14052 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14053 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14054 if ((insn1 & ~0xfffc) == LD_R2_0R12
14055 && insn2 == ADD_R2_R2_R12)
14056 {
14057 bfd_put_32 (input_bfd,
14058 ADDIS_R2_R12 + PPC_HA (relocation),
14059 contents + rel->r_offset);
14060 bfd_put_32 (input_bfd,
14061 ADDI_R2_R2 + PPC_LO (relocation),
14062 contents + rel->r_offset + 4);
14063 }
14064 }
14065 }
14066 break;
14067
14068 case R_PPC64_REL16_HA:
14069 /* If we are generating a non-PIC executable, edit
14070 . 0: addis 2,12,.TOC.-0b@ha
14071 . addi 2,2,.TOC.-0b@l
14072 used by ELFv2 global entry points to set up r2, to
14073 . lis 2,.TOC.@ha
14074 . addi 2,2,.TOC.@l
14075 if .TOC. is in range. */
14076 if (!bfd_link_pic (info)
14077 && !info->traditional_format
14078 && !htab->opd_abi
14079 && rel->r_addend == d_offset
14080 && h != NULL && &h->elf == htab->elf.hgot
14081 && rel + 1 < relend
14082 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14083 && rel[1].r_offset == rel->r_offset + 4
14084 && rel[1].r_addend == rel->r_addend + 4
14085 && relocation + 0x80008000 <= 0xffffffff)
14086 {
14087 unsigned int insn1, insn2;
14088 bfd_vma offset = rel->r_offset - d_offset;
14089 insn1 = bfd_get_32 (input_bfd, contents + offset);
14090 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14091 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14092 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14093 {
14094 r_type = R_PPC64_ADDR16_HA;
14095 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14096 rel->r_addend -= d_offset;
14097 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14098 rel[1].r_addend -= d_offset + 4;
14099 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14100 }
14101 }
14102 break;
14103 }
14104
14105 /* Handle other relocations that tweak non-addend part of insn. */
14106 insn = 0;
14107 max_br_offset = 1 << 25;
14108 addend = rel->r_addend;
14109 reloc_dest = DEST_NORMAL;
14110 switch (r_type)
14111 {
14112 default:
14113 break;
14114
14115 case R_PPC64_TOCSAVE:
14116 if (relocation + addend == (rel->r_offset
14117 + input_section->output_offset
14118 + input_section->output_section->vma)
14119 && tocsave_find (htab, NO_INSERT,
14120 &local_syms, rel, input_bfd))
14121 {
14122 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14123 if (insn == NOP
14124 || insn == CROR_151515 || insn == CROR_313131)
14125 bfd_put_32 (input_bfd,
14126 STD_R2_0R1 + STK_TOC (htab),
14127 contents + rel->r_offset);
14128 }
14129 break;
14130
14131 /* Branch taken prediction relocations. */
14132 case R_PPC64_ADDR14_BRTAKEN:
14133 case R_PPC64_REL14_BRTAKEN:
14134 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14135 /* Fall through. */
14136
14137 /* Branch not taken prediction relocations. */
14138 case R_PPC64_ADDR14_BRNTAKEN:
14139 case R_PPC64_REL14_BRNTAKEN:
14140 insn |= bfd_get_32 (input_bfd,
14141 contents + rel->r_offset) & ~(0x01 << 21);
14142 /* Fall through. */
14143
14144 case R_PPC64_REL14:
14145 max_br_offset = 1 << 15;
14146 /* Fall through. */
14147
14148 case R_PPC64_REL24:
14149 /* Calls to functions with a different TOC, such as calls to
14150 shared objects, need to alter the TOC pointer. This is
14151 done using a linkage stub. A REL24 branching to these
14152 linkage stubs needs to be followed by a nop, as the nop
14153 will be replaced with an instruction to restore the TOC
14154 base pointer. */
14155 fdh = h;
14156 if (h != NULL
14157 && h->oh != NULL
14158 && h->oh->is_func_descriptor)
14159 fdh = ppc_follow_link (h->oh);
14160 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14161 htab);
14162 if (stub_entry != NULL
14163 && (stub_entry->stub_type == ppc_stub_plt_call
14164 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14165 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14166 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14167 {
14168 bfd_boolean can_plt_call = FALSE;
14169
14170 /* All of these stubs will modify r2, so there must be a
14171 branch and link followed by a nop. The nop is
14172 replaced by an insn to restore r2. */
14173 if (rel->r_offset + 8 <= input_section->size)
14174 {
14175 unsigned long br;
14176
14177 br = bfd_get_32 (input_bfd,
14178 contents + rel->r_offset);
14179 if ((br & 1) != 0)
14180 {
14181 unsigned long nop;
14182
14183 nop = bfd_get_32 (input_bfd,
14184 contents + rel->r_offset + 4);
14185 if (nop == NOP
14186 || nop == CROR_151515 || nop == CROR_313131)
14187 {
14188 if (h != NULL
14189 && (h == htab->tls_get_addr_fd
14190 || h == htab->tls_get_addr)
14191 && htab->params->tls_get_addr_opt)
14192 {
14193 /* Special stub used, leave nop alone. */
14194 }
14195 else
14196 bfd_put_32 (input_bfd,
14197 LD_R2_0R1 + STK_TOC (htab),
14198 contents + rel->r_offset + 4);
14199 can_plt_call = TRUE;
14200 }
14201 }
14202 }
14203
14204 if (!can_plt_call && h != NULL)
14205 {
14206 const char *name = h->elf.root.root.string;
14207
14208 if (*name == '.')
14209 ++name;
14210
14211 if (strncmp (name, "__libc_start_main", 17) == 0
14212 && (name[17] == 0 || name[17] == '@'))
14213 {
14214 /* Allow crt1 branch to go via a toc adjusting
14215 stub. Other calls that never return could do
14216 the same, if we could detect such. */
14217 can_plt_call = TRUE;
14218 }
14219 }
14220
14221 if (!can_plt_call)
14222 {
14223 /* g++ as of 20130507 emits self-calls without a
14224 following nop. This is arguably wrong since we
14225 have conflicting information. On the one hand a
14226 global symbol and on the other a local call
14227 sequence, but don't error for this special case.
14228 It isn't possible to cheaply verify we have
14229 exactly such a call. Allow all calls to the same
14230 section. */
14231 asection *code_sec = sec;
14232
14233 if (get_opd_info (sec) != NULL)
14234 {
14235 bfd_vma off = (relocation + addend
14236 - sec->output_section->vma
14237 - sec->output_offset);
14238
14239 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14240 }
14241 if (code_sec == input_section)
14242 can_plt_call = TRUE;
14243 }
14244
14245 if (!can_plt_call)
14246 {
14247 if (stub_entry->stub_type == ppc_stub_plt_call
14248 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14249 info->callbacks->einfo
14250 /* xgettext:c-format */
14251 (_("%H: call to `%T' lacks nop, can't restore toc; "
14252 "recompile with -fPIC\n"),
14253 input_bfd, input_section, rel->r_offset, sym_name);
14254 else
14255 info->callbacks->einfo
14256 /* xgettext:c-format */
14257 (_("%H: call to `%T' lacks nop, can't restore toc; "
14258 "(-mcmodel=small toc adjust stub)\n"),
14259 input_bfd, input_section, rel->r_offset, sym_name);
14260
14261 bfd_set_error (bfd_error_bad_value);
14262 ret = FALSE;
14263 }
14264
14265 if (can_plt_call
14266 && (stub_entry->stub_type == ppc_stub_plt_call
14267 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14268 unresolved_reloc = FALSE;
14269 }
14270
14271 if ((stub_entry == NULL
14272 || stub_entry->stub_type == ppc_stub_long_branch
14273 || stub_entry->stub_type == ppc_stub_plt_branch)
14274 && get_opd_info (sec) != NULL)
14275 {
14276 /* The branch destination is the value of the opd entry. */
14277 bfd_vma off = (relocation + addend
14278 - sec->output_section->vma
14279 - sec->output_offset);
14280 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14281 if (dest != (bfd_vma) -1)
14282 {
14283 relocation = dest;
14284 addend = 0;
14285 reloc_dest = DEST_OPD;
14286 }
14287 }
14288
14289 /* If the branch is out of reach we ought to have a long
14290 branch stub. */
14291 from = (rel->r_offset
14292 + input_section->output_offset
14293 + input_section->output_section->vma);
14294
14295 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14296 ? fdh->elf.other
14297 : sym->st_other);
14298
14299 if (stub_entry != NULL
14300 && (stub_entry->stub_type == ppc_stub_long_branch
14301 || stub_entry->stub_type == ppc_stub_plt_branch)
14302 && (r_type == R_PPC64_ADDR14_BRTAKEN
14303 || r_type == R_PPC64_ADDR14_BRNTAKEN
14304 || (relocation + addend - from + max_br_offset
14305 < 2 * max_br_offset)))
14306 /* Don't use the stub if this branch is in range. */
14307 stub_entry = NULL;
14308
14309 if (stub_entry != NULL)
14310 {
14311 /* Munge up the value and addend so that we call the stub
14312 rather than the procedure directly. */
14313 asection *stub_sec = stub_entry->group->stub_sec;
14314
14315 if (stub_entry->stub_type == ppc_stub_save_res)
14316 relocation += (stub_sec->output_offset
14317 + stub_sec->output_section->vma
14318 + stub_sec->size - htab->sfpr->size
14319 - htab->sfpr->output_offset
14320 - htab->sfpr->output_section->vma);
14321 else
14322 relocation = (stub_entry->stub_offset
14323 + stub_sec->output_offset
14324 + stub_sec->output_section->vma);
14325 addend = 0;
14326 reloc_dest = DEST_STUB;
14327
14328 if ((stub_entry->stub_type == ppc_stub_plt_call
14329 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14330 && (ALWAYS_EMIT_R2SAVE
14331 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14332 && rel + 1 < relend
14333 && rel[1].r_offset == rel->r_offset + 4
14334 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14335 relocation += 4;
14336 }
14337
14338 if (insn != 0)
14339 {
14340 if (is_isa_v2)
14341 {
14342 /* Set 'a' bit. This is 0b00010 in BO field for branch
14343 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14344 for branch on CTR insns (BO == 1a00t or 1a01t). */
14345 if ((insn & (0x14 << 21)) == (0x04 << 21))
14346 insn |= 0x02 << 21;
14347 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14348 insn |= 0x08 << 21;
14349 else
14350 break;
14351 }
14352 else
14353 {
14354 /* Invert 'y' bit if not the default. */
14355 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14356 insn ^= 0x01 << 21;
14357 }
14358
14359 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14360 }
14361
14362 /* NOP out calls to undefined weak functions.
14363 We can thus call a weak function without first
14364 checking whether the function is defined. */
14365 else if (h != NULL
14366 && h->elf.root.type == bfd_link_hash_undefweak
14367 && h->elf.dynindx == -1
14368 && r_type == R_PPC64_REL24
14369 && relocation == 0
14370 && addend == 0)
14371 {
14372 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14373 goto copy_reloc;
14374 }
14375 break;
14376 }
14377
14378 /* Set `addend'. */
14379 tls_type = 0;
14380 switch (r_type)
14381 {
14382 default:
14383 info->callbacks->einfo
14384 /* xgettext:c-format */
14385 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14386 input_bfd, (int) r_type, sym_name);
14387
14388 bfd_set_error (bfd_error_bad_value);
14389 ret = FALSE;
14390 goto copy_reloc;
14391
14392 case R_PPC64_NONE:
14393 case R_PPC64_TLS:
14394 case R_PPC64_TLSGD:
14395 case R_PPC64_TLSLD:
14396 case R_PPC64_TOCSAVE:
14397 case R_PPC64_GNU_VTINHERIT:
14398 case R_PPC64_GNU_VTENTRY:
14399 case R_PPC64_ENTRY:
14400 goto copy_reloc;
14401
14402 /* GOT16 relocations. Like an ADDR16 using the symbol's
14403 address in the GOT as relocation value instead of the
14404 symbol's value itself. Also, create a GOT entry for the
14405 symbol and put the symbol value there. */
14406 case R_PPC64_GOT_TLSGD16:
14407 case R_PPC64_GOT_TLSGD16_LO:
14408 case R_PPC64_GOT_TLSGD16_HI:
14409 case R_PPC64_GOT_TLSGD16_HA:
14410 tls_type = TLS_TLS | TLS_GD;
14411 goto dogot;
14412
14413 case R_PPC64_GOT_TLSLD16:
14414 case R_PPC64_GOT_TLSLD16_LO:
14415 case R_PPC64_GOT_TLSLD16_HI:
14416 case R_PPC64_GOT_TLSLD16_HA:
14417 tls_type = TLS_TLS | TLS_LD;
14418 goto dogot;
14419
14420 case R_PPC64_GOT_TPREL16_DS:
14421 case R_PPC64_GOT_TPREL16_LO_DS:
14422 case R_PPC64_GOT_TPREL16_HI:
14423 case R_PPC64_GOT_TPREL16_HA:
14424 tls_type = TLS_TLS | TLS_TPREL;
14425 goto dogot;
14426
14427 case R_PPC64_GOT_DTPREL16_DS:
14428 case R_PPC64_GOT_DTPREL16_LO_DS:
14429 case R_PPC64_GOT_DTPREL16_HI:
14430 case R_PPC64_GOT_DTPREL16_HA:
14431 tls_type = TLS_TLS | TLS_DTPREL;
14432 goto dogot;
14433
14434 case R_PPC64_GOT16:
14435 case R_PPC64_GOT16_LO:
14436 case R_PPC64_GOT16_HI:
14437 case R_PPC64_GOT16_HA:
14438 case R_PPC64_GOT16_DS:
14439 case R_PPC64_GOT16_LO_DS:
14440 dogot:
14441 {
14442 /* Relocation is to the entry for this symbol in the global
14443 offset table. */
14444 asection *got;
14445 bfd_vma *offp;
14446 bfd_vma off;
14447 unsigned long indx = 0;
14448 struct got_entry *ent;
14449
14450 if (tls_type == (TLS_TLS | TLS_LD)
14451 && (h == NULL
14452 || !h->elf.def_dynamic))
14453 ent = ppc64_tlsld_got (input_bfd);
14454 else
14455 {
14456 if (h != NULL)
14457 {
14458 if (!htab->elf.dynamic_sections_created
14459 || h->elf.dynindx == -1
14460 || SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14461 || (ELF_ST_VISIBILITY (h->elf.other) != STV_DEFAULT
14462 && h->elf.root.type == bfd_link_hash_undefweak))
14463 /* This is actually a static link, or it is a
14464 -Bsymbolic link and the symbol is defined
14465 locally, or the symbol was forced to be local
14466 because of a version file. */
14467 ;
14468 else
14469 {
14470 indx = h->elf.dynindx;
14471 unresolved_reloc = FALSE;
14472 }
14473 ent = h->elf.got.glist;
14474 }
14475 else
14476 {
14477 if (local_got_ents == NULL)
14478 abort ();
14479 ent = local_got_ents[r_symndx];
14480 }
14481
14482 for (; ent != NULL; ent = ent->next)
14483 if (ent->addend == orig_rel.r_addend
14484 && ent->owner == input_bfd
14485 && ent->tls_type == tls_type)
14486 break;
14487 }
14488
14489 if (ent == NULL)
14490 abort ();
14491 if (ent->is_indirect)
14492 ent = ent->got.ent;
14493 offp = &ent->got.offset;
14494 got = ppc64_elf_tdata (ent->owner)->got;
14495 if (got == NULL)
14496 abort ();
14497
14498 /* The offset must always be a multiple of 8. We use the
14499 least significant bit to record whether we have already
14500 processed this entry. */
14501 off = *offp;
14502 if ((off & 1) != 0)
14503 off &= ~1;
14504 else
14505 {
14506 /* Generate relocs for the dynamic linker, except in
14507 the case of TLSLD where we'll use one entry per
14508 module. */
14509 asection *relgot;
14510 bfd_boolean ifunc;
14511
14512 *offp = off | 1;
14513 relgot = NULL;
14514 ifunc = (h != NULL
14515 ? h->elf.type == STT_GNU_IFUNC
14516 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14517 if (ifunc)
14518 {
14519 relgot = htab->elf.irelplt;
14520 if (indx == 0)
14521 htab->local_ifunc_resolver = 1;
14522 else if (is_static_defined (&h->elf))
14523 htab->maybe_local_ifunc_resolver = 1;
14524 }
14525 else if (indx != 0
14526 || (bfd_link_pic (info)
14527 && (h == NULL
14528 || (ELF_ST_VISIBILITY (h->elf.other)
14529 == STV_DEFAULT)
14530 || h->elf.root.type != bfd_link_hash_undefweak
14531 || (tls_type == (TLS_TLS | TLS_LD)
14532 && !h->elf.def_dynamic))))
14533 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14534 if (relgot != NULL)
14535 {
14536 outrel.r_offset = (got->output_section->vma
14537 + got->output_offset
14538 + off);
14539 outrel.r_addend = addend;
14540 if (tls_type & (TLS_LD | TLS_GD))
14541 {
14542 outrel.r_addend = 0;
14543 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14544 if (tls_type == (TLS_TLS | TLS_GD))
14545 {
14546 loc = relgot->contents;
14547 loc += (relgot->reloc_count++
14548 * sizeof (Elf64_External_Rela));
14549 bfd_elf64_swap_reloca_out (output_bfd,
14550 &outrel, loc);
14551 outrel.r_offset += 8;
14552 outrel.r_addend = addend;
14553 outrel.r_info
14554 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14555 }
14556 }
14557 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14558 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14559 else if (tls_type == (TLS_TLS | TLS_TPREL))
14560 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14561 else if (indx != 0)
14562 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14563 else
14564 {
14565 if (ifunc)
14566 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14567 else
14568 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14569
14570 /* Write the .got section contents for the sake
14571 of prelink. */
14572 loc = got->contents + off;
14573 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14574 loc);
14575 }
14576
14577 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14578 {
14579 outrel.r_addend += relocation;
14580 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14581 {
14582 if (htab->elf.tls_sec == NULL)
14583 outrel.r_addend = 0;
14584 else
14585 outrel.r_addend -= htab->elf.tls_sec->vma;
14586 }
14587 }
14588 loc = relgot->contents;
14589 loc += (relgot->reloc_count++
14590 * sizeof (Elf64_External_Rela));
14591 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14592 }
14593
14594 /* Init the .got section contents here if we're not
14595 emitting a reloc. */
14596 else
14597 {
14598 int tlsopt
14599 = (htab->params->tls_get_addr_opt
14600 && htab->tls_get_addr_fd != NULL
14601 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
14602
14603 relocation += addend;
14604 if (tls_type != 0)
14605 {
14606 if (htab->elf.tls_sec == NULL)
14607 relocation = 0;
14608 else
14609 {
14610 if (tls_type & TLS_LD)
14611 relocation = 0;
14612 else
14613 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14614 if ((tls_type & TLS_TPREL)
14615 || (tlsopt && !(tls_type & TLS_DTPREL)))
14616 relocation += DTP_OFFSET - TP_OFFSET;
14617 }
14618
14619 if (tls_type & (TLS_GD | TLS_LD))
14620 {
14621 bfd_put_64 (output_bfd, relocation,
14622 got->contents + off + 8);
14623 relocation = !tlsopt;
14624 }
14625 }
14626 bfd_put_64 (output_bfd, relocation,
14627 got->contents + off);
14628 }
14629 }
14630
14631 if (off >= (bfd_vma) -2)
14632 abort ();
14633
14634 relocation = got->output_section->vma + got->output_offset + off;
14635 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14636 }
14637 break;
14638
14639 case R_PPC64_PLT16_HA:
14640 case R_PPC64_PLT16_HI:
14641 case R_PPC64_PLT16_LO:
14642 case R_PPC64_PLT32:
14643 case R_PPC64_PLT64:
14644 /* Relocation is to the entry for this symbol in the
14645 procedure linkage table. */
14646 {
14647 struct plt_entry **plt_list = NULL;
14648 if (h != NULL)
14649 plt_list = &h->elf.plt.plist;
14650 else if (local_got_ents != NULL)
14651 {
14652 struct plt_entry **local_plt = (struct plt_entry **)
14653 (local_got_ents + symtab_hdr->sh_info);
14654 unsigned char *local_got_tls_masks = (unsigned char *)
14655 (local_plt + symtab_hdr->sh_info);
14656 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14657 plt_list = local_plt + r_symndx;
14658 }
14659 if (plt_list)
14660 {
14661 struct plt_entry *ent;
14662
14663 for (ent = *plt_list; ent != NULL; ent = ent->next)
14664 if (ent->plt.offset != (bfd_vma) -1
14665 && ent->addend == orig_rel.r_addend)
14666 {
14667 asection *plt;
14668
14669 plt = htab->elf.splt;
14670 if (!htab->elf.dynamic_sections_created
14671 || h == NULL
14672 || h->elf.dynindx == -1)
14673 plt = htab->elf.iplt;
14674 relocation = (plt->output_section->vma
14675 + plt->output_offset
14676 + ent->plt.offset);
14677 addend = 0;
14678 unresolved_reloc = FALSE;
14679 break;
14680 }
14681 }
14682 }
14683 break;
14684
14685 case R_PPC64_TOC:
14686 /* Relocation value is TOC base. */
14687 relocation = TOCstart;
14688 if (r_symndx == STN_UNDEF)
14689 relocation += htab->sec_info[input_section->id].toc_off;
14690 else if (unresolved_reloc)
14691 ;
14692 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14693 relocation += htab->sec_info[sec->id].toc_off;
14694 else
14695 unresolved_reloc = TRUE;
14696 goto dodyn;
14697
14698 /* TOC16 relocs. We want the offset relative to the TOC base,
14699 which is the address of the start of the TOC plus 0x8000.
14700 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14701 in this order. */
14702 case R_PPC64_TOC16:
14703 case R_PPC64_TOC16_LO:
14704 case R_PPC64_TOC16_HI:
14705 case R_PPC64_TOC16_DS:
14706 case R_PPC64_TOC16_LO_DS:
14707 case R_PPC64_TOC16_HA:
14708 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14709 break;
14710
14711 /* Relocate against the beginning of the section. */
14712 case R_PPC64_SECTOFF:
14713 case R_PPC64_SECTOFF_LO:
14714 case R_PPC64_SECTOFF_HI:
14715 case R_PPC64_SECTOFF_DS:
14716 case R_PPC64_SECTOFF_LO_DS:
14717 case R_PPC64_SECTOFF_HA:
14718 if (sec != NULL)
14719 addend -= sec->output_section->vma;
14720 break;
14721
14722 case R_PPC64_REL16:
14723 case R_PPC64_REL16_LO:
14724 case R_PPC64_REL16_HI:
14725 case R_PPC64_REL16_HA:
14726 case R_PPC64_REL16DX_HA:
14727 break;
14728
14729 case R_PPC64_REL14:
14730 case R_PPC64_REL14_BRNTAKEN:
14731 case R_PPC64_REL14_BRTAKEN:
14732 case R_PPC64_REL24:
14733 break;
14734
14735 case R_PPC64_TPREL16:
14736 case R_PPC64_TPREL16_LO:
14737 case R_PPC64_TPREL16_HI:
14738 case R_PPC64_TPREL16_HA:
14739 case R_PPC64_TPREL16_DS:
14740 case R_PPC64_TPREL16_LO_DS:
14741 case R_PPC64_TPREL16_HIGH:
14742 case R_PPC64_TPREL16_HIGHA:
14743 case R_PPC64_TPREL16_HIGHER:
14744 case R_PPC64_TPREL16_HIGHERA:
14745 case R_PPC64_TPREL16_HIGHEST:
14746 case R_PPC64_TPREL16_HIGHESTA:
14747 if (h != NULL
14748 && h->elf.root.type == bfd_link_hash_undefweak
14749 && h->elf.dynindx == -1)
14750 {
14751 /* Make this relocation against an undefined weak symbol
14752 resolve to zero. This is really just a tweak, since
14753 code using weak externs ought to check that they are
14754 defined before using them. */
14755 bfd_byte *p = contents + rel->r_offset - d_offset;
14756
14757 insn = bfd_get_32 (input_bfd, p);
14758 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14759 if (insn != 0)
14760 bfd_put_32 (input_bfd, insn, p);
14761 break;
14762 }
14763 if (htab->elf.tls_sec != NULL)
14764 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14765 if (bfd_link_pic (info))
14766 /* The TPREL16 relocs shouldn't really be used in shared
14767 libs as they will result in DT_TEXTREL being set, but
14768 support them anyway. */
14769 goto dodyn;
14770 break;
14771
14772 case R_PPC64_DTPREL16:
14773 case R_PPC64_DTPREL16_LO:
14774 case R_PPC64_DTPREL16_HI:
14775 case R_PPC64_DTPREL16_HA:
14776 case R_PPC64_DTPREL16_DS:
14777 case R_PPC64_DTPREL16_LO_DS:
14778 case R_PPC64_DTPREL16_HIGH:
14779 case R_PPC64_DTPREL16_HIGHA:
14780 case R_PPC64_DTPREL16_HIGHER:
14781 case R_PPC64_DTPREL16_HIGHERA:
14782 case R_PPC64_DTPREL16_HIGHEST:
14783 case R_PPC64_DTPREL16_HIGHESTA:
14784 if (htab->elf.tls_sec != NULL)
14785 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14786 break;
14787
14788 case R_PPC64_ADDR64_LOCAL:
14789 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14790 ? h->elf.other
14791 : sym->st_other);
14792 break;
14793
14794 case R_PPC64_DTPMOD64:
14795 relocation = 1;
14796 addend = 0;
14797 goto dodyn;
14798
14799 case R_PPC64_TPREL64:
14800 if (htab->elf.tls_sec != NULL)
14801 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14802 goto dodyn;
14803
14804 case R_PPC64_DTPREL64:
14805 if (htab->elf.tls_sec != NULL)
14806 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14807 /* Fall through. */
14808
14809 /* Relocations that may need to be propagated if this is a
14810 dynamic object. */
14811 case R_PPC64_REL30:
14812 case R_PPC64_REL32:
14813 case R_PPC64_REL64:
14814 case R_PPC64_ADDR14:
14815 case R_PPC64_ADDR14_BRNTAKEN:
14816 case R_PPC64_ADDR14_BRTAKEN:
14817 case R_PPC64_ADDR16:
14818 case R_PPC64_ADDR16_DS:
14819 case R_PPC64_ADDR16_HA:
14820 case R_PPC64_ADDR16_HI:
14821 case R_PPC64_ADDR16_HIGH:
14822 case R_PPC64_ADDR16_HIGHA:
14823 case R_PPC64_ADDR16_HIGHER:
14824 case R_PPC64_ADDR16_HIGHERA:
14825 case R_PPC64_ADDR16_HIGHEST:
14826 case R_PPC64_ADDR16_HIGHESTA:
14827 case R_PPC64_ADDR16_LO:
14828 case R_PPC64_ADDR16_LO_DS:
14829 case R_PPC64_ADDR24:
14830 case R_PPC64_ADDR32:
14831 case R_PPC64_ADDR64:
14832 case R_PPC64_UADDR16:
14833 case R_PPC64_UADDR32:
14834 case R_PPC64_UADDR64:
14835 dodyn:
14836 if ((input_section->flags & SEC_ALLOC) == 0)
14837 break;
14838
14839 if (NO_OPD_RELOCS && is_opd)
14840 break;
14841
14842 if (bfd_link_pic (info)
14843 ? ((h == NULL
14844 || h->dyn_relocs != NULL)
14845 && ((h != NULL && pc_dynrelocs (h))
14846 || must_be_dyn_reloc (info, r_type)))
14847 : (h != NULL
14848 ? h->dyn_relocs != NULL
14849 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14850 {
14851 bfd_boolean skip, relocate;
14852 asection *sreloc;
14853 bfd_vma out_off;
14854 long indx = 0;
14855
14856 /* When generating a dynamic object, these relocations
14857 are copied into the output file to be resolved at run
14858 time. */
14859
14860 skip = FALSE;
14861 relocate = FALSE;
14862
14863 out_off = _bfd_elf_section_offset (output_bfd, info,
14864 input_section, rel->r_offset);
14865 if (out_off == (bfd_vma) -1)
14866 skip = TRUE;
14867 else if (out_off == (bfd_vma) -2)
14868 skip = TRUE, relocate = TRUE;
14869 out_off += (input_section->output_section->vma
14870 + input_section->output_offset);
14871 outrel.r_offset = out_off;
14872 outrel.r_addend = rel->r_addend;
14873
14874 /* Optimize unaligned reloc use. */
14875 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14876 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14877 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14878 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14879 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14880 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14881 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14882 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14883 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14884
14885 if (skip)
14886 memset (&outrel, 0, sizeof outrel);
14887 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14888 && !is_opd
14889 && r_type != R_PPC64_TOC)
14890 {
14891 indx = h->elf.dynindx;
14892 BFD_ASSERT (indx != -1);
14893 outrel.r_info = ELF64_R_INFO (indx, r_type);
14894 }
14895 else
14896 {
14897 /* This symbol is local, or marked to become local,
14898 or this is an opd section reloc which must point
14899 at a local function. */
14900 outrel.r_addend += relocation;
14901 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14902 {
14903 if (is_opd && h != NULL)
14904 {
14905 /* Lie about opd entries. This case occurs
14906 when building shared libraries and we
14907 reference a function in another shared
14908 lib. The same thing happens for a weak
14909 definition in an application that's
14910 overridden by a strong definition in a
14911 shared lib. (I believe this is a generic
14912 bug in binutils handling of weak syms.)
14913 In these cases we won't use the opd
14914 entry in this lib. */
14915 unresolved_reloc = FALSE;
14916 }
14917 if (!is_opd
14918 && r_type == R_PPC64_ADDR64
14919 && (h != NULL
14920 ? h->elf.type == STT_GNU_IFUNC
14921 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14922 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14923 else
14924 {
14925 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14926
14927 /* We need to relocate .opd contents for ld.so.
14928 Prelink also wants simple and consistent rules
14929 for relocs. This make all RELATIVE relocs have
14930 *r_offset equal to r_addend. */
14931 relocate = TRUE;
14932 }
14933 }
14934 else
14935 {
14936 if (h != NULL
14937 ? h->elf.type == STT_GNU_IFUNC
14938 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14939 {
14940 info->callbacks->einfo
14941 /* xgettext:c-format */
14942 (_("%H: %s for indirect "
14943 "function `%T' unsupported\n"),
14944 input_bfd, input_section, rel->r_offset,
14945 ppc64_elf_howto_table[r_type]->name,
14946 sym_name);
14947 ret = FALSE;
14948 }
14949 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14950 ;
14951 else if (sec == NULL || sec->owner == NULL)
14952 {
14953 bfd_set_error (bfd_error_bad_value);
14954 return FALSE;
14955 }
14956 else
14957 {
14958 asection *osec;
14959
14960 osec = sec->output_section;
14961 indx = elf_section_data (osec)->dynindx;
14962
14963 if (indx == 0)
14964 {
14965 if ((osec->flags & SEC_READONLY) == 0
14966 && htab->elf.data_index_section != NULL)
14967 osec = htab->elf.data_index_section;
14968 else
14969 osec = htab->elf.text_index_section;
14970 indx = elf_section_data (osec)->dynindx;
14971 }
14972 BFD_ASSERT (indx != 0);
14973
14974 /* We are turning this relocation into one
14975 against a section symbol, so subtract out
14976 the output section's address but not the
14977 offset of the input section in the output
14978 section. */
14979 outrel.r_addend -= osec->vma;
14980 }
14981
14982 outrel.r_info = ELF64_R_INFO (indx, r_type);
14983 }
14984 }
14985
14986 sreloc = elf_section_data (input_section)->sreloc;
14987 if (h != NULL
14988 ? h->elf.type == STT_GNU_IFUNC
14989 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14990 {
14991 sreloc = htab->elf.irelplt;
14992 if (indx == 0)
14993 htab->local_ifunc_resolver = 1;
14994 else if (is_static_defined (&h->elf))
14995 htab->maybe_local_ifunc_resolver = 1;
14996 }
14997 if (sreloc == NULL)
14998 abort ();
14999
15000 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
15001 >= sreloc->size)
15002 abort ();
15003 loc = sreloc->contents;
15004 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
15005 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
15006
15007 /* If this reloc is against an external symbol, it will
15008 be computed at runtime, so there's no need to do
15009 anything now. However, for the sake of prelink ensure
15010 that the section contents are a known value. */
15011 if (! relocate)
15012 {
15013 unresolved_reloc = FALSE;
15014 /* The value chosen here is quite arbitrary as ld.so
15015 ignores section contents except for the special
15016 case of .opd where the contents might be accessed
15017 before relocation. Choose zero, as that won't
15018 cause reloc overflow. */
15019 relocation = 0;
15020 addend = 0;
15021 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
15022 to improve backward compatibility with older
15023 versions of ld. */
15024 if (r_type == R_PPC64_ADDR64)
15025 addend = outrel.r_addend;
15026 /* Adjust pc_relative relocs to have zero in *r_offset. */
15027 else if (ppc64_elf_howto_table[r_type]->pc_relative)
15028 addend = outrel.r_offset;
15029 }
15030 }
15031 else if (r_type == R_PPC64_DTPMOD64
15032 && htab->params->tls_get_addr_opt
15033 && htab->tls_get_addr_fd != NULL
15034 && htab->tls_get_addr_fd->elf.plt.plist != NULL)
15035 {
15036 /* Set up for __tls_get_addr_opt stub, when this entry
15037 does not have dynamic relocs. */
15038 relocation = 0;
15039 /* Set up the next word for local dynamic. If it turns
15040 out to be global dynamic, the reloc will overwrite
15041 this value. */
15042 if (rel->r_offset + 16 <= input_section->size)
15043 bfd_put_64 (input_bfd, DTP_OFFSET - TP_OFFSET,
15044 contents + rel->r_offset + 8);
15045 }
15046 else if (r_type == R_PPC64_DTPREL64
15047 && htab->params->tls_get_addr_opt
15048 && htab->tls_get_addr_fd != NULL
15049 && htab->tls_get_addr_fd->elf.plt.plist != NULL
15050 && rel > relocs
15051 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
15052 && rel[-1].r_offset + 8 == rel->r_offset)
15053 {
15054 /* __tls_get_addr_opt stub value. */
15055 addend += DTP_OFFSET - TP_OFFSET;
15056 }
15057 break;
15058
15059 case R_PPC64_COPY:
15060 case R_PPC64_GLOB_DAT:
15061 case R_PPC64_JMP_SLOT:
15062 case R_PPC64_JMP_IREL:
15063 case R_PPC64_RELATIVE:
15064 /* We shouldn't ever see these dynamic relocs in relocatable
15065 files. */
15066 /* Fall through. */
15067
15068 case R_PPC64_PLTGOT16:
15069 case R_PPC64_PLTGOT16_DS:
15070 case R_PPC64_PLTGOT16_HA:
15071 case R_PPC64_PLTGOT16_HI:
15072 case R_PPC64_PLTGOT16_LO:
15073 case R_PPC64_PLTGOT16_LO_DS:
15074 case R_PPC64_PLTREL32:
15075 case R_PPC64_PLTREL64:
15076 /* These ones haven't been implemented yet. */
15077
15078 info->callbacks->einfo
15079 /* xgettext:c-format */
15080 (_("%P: %B: %s is not supported for `%T'\n"),
15081 input_bfd,
15082 ppc64_elf_howto_table[r_type]->name, sym_name);
15083
15084 bfd_set_error (bfd_error_invalid_operation);
15085 ret = FALSE;
15086 goto copy_reloc;
15087 }
15088
15089 /* Multi-instruction sequences that access the TOC can be
15090 optimized, eg. addis ra,r2,0; addi rb,ra,x;
15091 to nop; addi rb,r2,x; */
15092 switch (r_type)
15093 {
15094 default:
15095 break;
15096
15097 case R_PPC64_GOT_TLSLD16_HI:
15098 case R_PPC64_GOT_TLSGD16_HI:
15099 case R_PPC64_GOT_TPREL16_HI:
15100 case R_PPC64_GOT_DTPREL16_HI:
15101 case R_PPC64_GOT16_HI:
15102 case R_PPC64_TOC16_HI:
15103 /* These relocs would only be useful if building up an
15104 offset to later add to r2, perhaps in an indexed
15105 addressing mode instruction. Don't try to optimize.
15106 Unfortunately, the possibility of someone building up an
15107 offset like this or even with the HA relocs, means that
15108 we need to check the high insn when optimizing the low
15109 insn. */
15110 break;
15111
15112 case R_PPC64_GOT_TLSLD16_HA:
15113 case R_PPC64_GOT_TLSGD16_HA:
15114 case R_PPC64_GOT_TPREL16_HA:
15115 case R_PPC64_GOT_DTPREL16_HA:
15116 case R_PPC64_GOT16_HA:
15117 case R_PPC64_TOC16_HA:
15118 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15119 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15120 {
15121 bfd_byte *p = contents + (rel->r_offset & ~3);
15122 bfd_put_32 (input_bfd, NOP, p);
15123 }
15124 break;
15125
15126 case R_PPC64_GOT_TLSLD16_LO:
15127 case R_PPC64_GOT_TLSGD16_LO:
15128 case R_PPC64_GOT_TPREL16_LO_DS:
15129 case R_PPC64_GOT_DTPREL16_LO_DS:
15130 case R_PPC64_GOT16_LO:
15131 case R_PPC64_GOT16_LO_DS:
15132 case R_PPC64_TOC16_LO:
15133 case R_PPC64_TOC16_LO_DS:
15134 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15135 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15136 {
15137 bfd_byte *p = contents + (rel->r_offset & ~3);
15138 insn = bfd_get_32 (input_bfd, p);
15139 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15140 {
15141 /* Transform addic to addi when we change reg. */
15142 insn &= ~((0x3f << 26) | (0x1f << 16));
15143 insn |= (14u << 26) | (2 << 16);
15144 }
15145 else
15146 {
15147 insn &= ~(0x1f << 16);
15148 insn |= 2 << 16;
15149 }
15150 bfd_put_32 (input_bfd, insn, p);
15151 }
15152 break;
15153 }
15154
15155 /* Do any further special processing. */
15156 howto = ppc64_elf_howto_table[(int) r_type];
15157 switch (r_type)
15158 {
15159 default:
15160 break;
15161
15162 case R_PPC64_REL16_HA:
15163 case R_PPC64_REL16DX_HA:
15164 case R_PPC64_ADDR16_HA:
15165 case R_PPC64_ADDR16_HIGHA:
15166 case R_PPC64_ADDR16_HIGHERA:
15167 case R_PPC64_ADDR16_HIGHESTA:
15168 case R_PPC64_TOC16_HA:
15169 case R_PPC64_SECTOFF_HA:
15170 case R_PPC64_TPREL16_HA:
15171 case R_PPC64_TPREL16_HIGHA:
15172 case R_PPC64_TPREL16_HIGHERA:
15173 case R_PPC64_TPREL16_HIGHESTA:
15174 case R_PPC64_DTPREL16_HA:
15175 case R_PPC64_DTPREL16_HIGHA:
15176 case R_PPC64_DTPREL16_HIGHERA:
15177 case R_PPC64_DTPREL16_HIGHESTA:
15178 /* It's just possible that this symbol is a weak symbol
15179 that's not actually defined anywhere. In that case,
15180 'sec' would be NULL, and we should leave the symbol
15181 alone (it will be set to zero elsewhere in the link). */
15182 if (sec == NULL)
15183 break;
15184 /* Fall through. */
15185
15186 case R_PPC64_GOT16_HA:
15187 case R_PPC64_PLTGOT16_HA:
15188 case R_PPC64_PLT16_HA:
15189 case R_PPC64_GOT_TLSGD16_HA:
15190 case R_PPC64_GOT_TLSLD16_HA:
15191 case R_PPC64_GOT_TPREL16_HA:
15192 case R_PPC64_GOT_DTPREL16_HA:
15193 /* Add 0x10000 if sign bit in 0:15 is set.
15194 Bits 0:15 are not used. */
15195 addend += 0x8000;
15196 break;
15197
15198 case R_PPC64_ADDR16_DS:
15199 case R_PPC64_ADDR16_LO_DS:
15200 case R_PPC64_GOT16_DS:
15201 case R_PPC64_GOT16_LO_DS:
15202 case R_PPC64_PLT16_LO_DS:
15203 case R_PPC64_SECTOFF_DS:
15204 case R_PPC64_SECTOFF_LO_DS:
15205 case R_PPC64_TOC16_DS:
15206 case R_PPC64_TOC16_LO_DS:
15207 case R_PPC64_PLTGOT16_DS:
15208 case R_PPC64_PLTGOT16_LO_DS:
15209 case R_PPC64_GOT_TPREL16_DS:
15210 case R_PPC64_GOT_TPREL16_LO_DS:
15211 case R_PPC64_GOT_DTPREL16_DS:
15212 case R_PPC64_GOT_DTPREL16_LO_DS:
15213 case R_PPC64_TPREL16_DS:
15214 case R_PPC64_TPREL16_LO_DS:
15215 case R_PPC64_DTPREL16_DS:
15216 case R_PPC64_DTPREL16_LO_DS:
15217 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15218 mask = 3;
15219 /* If this reloc is against an lq, lxv, or stxv insn, then
15220 the value must be a multiple of 16. This is somewhat of
15221 a hack, but the "correct" way to do this by defining _DQ
15222 forms of all the _DS relocs bloats all reloc switches in
15223 this file. It doesn't make much sense to use these
15224 relocs in data, so testing the insn should be safe. */
15225 if ((insn & (0x3f << 26)) == (56u << 26)
15226 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15227 mask = 15;
15228 relocation += addend;
15229 addend = insn & (mask ^ 3);
15230 if ((relocation & mask) != 0)
15231 {
15232 relocation ^= relocation & mask;
15233 info->callbacks->einfo
15234 /* xgettext:c-format */
15235 (_("%H: error: %s not a multiple of %u\n"),
15236 input_bfd, input_section, rel->r_offset,
15237 howto->name,
15238 mask + 1);
15239 bfd_set_error (bfd_error_bad_value);
15240 ret = FALSE;
15241 goto copy_reloc;
15242 }
15243 break;
15244 }
15245
15246 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15247 because such sections are not SEC_ALLOC and thus ld.so will
15248 not process them. */
15249 if (unresolved_reloc
15250 && !((input_section->flags & SEC_DEBUGGING) != 0
15251 && h->elf.def_dynamic)
15252 && _bfd_elf_section_offset (output_bfd, info, input_section,
15253 rel->r_offset) != (bfd_vma) -1)
15254 {
15255 info->callbacks->einfo
15256 /* xgettext:c-format */
15257 (_("%H: unresolvable %s against `%T'\n"),
15258 input_bfd, input_section, rel->r_offset,
15259 howto->name,
15260 h->elf.root.root.string);
15261 ret = FALSE;
15262 }
15263
15264 /* 16-bit fields in insns mostly have signed values, but a
15265 few insns have 16-bit unsigned values. Really, we should
15266 have different reloc types. */
15267 if (howto->complain_on_overflow != complain_overflow_dont
15268 && howto->dst_mask == 0xffff
15269 && (input_section->flags & SEC_CODE) != 0)
15270 {
15271 enum complain_overflow complain = complain_overflow_signed;
15272
15273 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15274 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15275 complain = complain_overflow_bitfield;
15276 else if (howto->rightshift == 0
15277 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15278 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15279 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15280 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15281 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15282 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15283 complain = complain_overflow_unsigned;
15284 if (howto->complain_on_overflow != complain)
15285 {
15286 alt_howto = *howto;
15287 alt_howto.complain_on_overflow = complain;
15288 howto = &alt_howto;
15289 }
15290 }
15291
15292 if (r_type == R_PPC64_REL16DX_HA)
15293 {
15294 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15295 if (rel->r_offset + 4 > input_section->size)
15296 r = bfd_reloc_outofrange;
15297 else
15298 {
15299 relocation += addend;
15300 relocation -= (rel->r_offset
15301 + input_section->output_offset
15302 + input_section->output_section->vma);
15303 relocation = (bfd_signed_vma) relocation >> 16;
15304 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15305 insn &= ~0x1fffc1;
15306 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15307 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15308 r = bfd_reloc_ok;
15309 if (relocation + 0x8000 > 0xffff)
15310 r = bfd_reloc_overflow;
15311 }
15312 }
15313 else
15314 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15315 rel->r_offset, relocation, addend);
15316
15317 if (r != bfd_reloc_ok)
15318 {
15319 char *more_info = NULL;
15320 const char *reloc_name = howto->name;
15321
15322 if (reloc_dest != DEST_NORMAL)
15323 {
15324 more_info = bfd_malloc (strlen (reloc_name) + 8);
15325 if (more_info != NULL)
15326 {
15327 strcpy (more_info, reloc_name);
15328 strcat (more_info, (reloc_dest == DEST_OPD
15329 ? " (OPD)" : " (stub)"));
15330 reloc_name = more_info;
15331 }
15332 }
15333
15334 if (r == bfd_reloc_overflow)
15335 {
15336 /* On code like "if (foo) foo();" don't report overflow
15337 on a branch to zero when foo is undefined. */
15338 if (!warned
15339 && (reloc_dest == DEST_STUB
15340 || !(h != NULL
15341 && (h->elf.root.type == bfd_link_hash_undefweak
15342 || h->elf.root.type == bfd_link_hash_undefined)
15343 && is_branch_reloc (r_type))))
15344 info->callbacks->reloc_overflow (info, &h->elf.root,
15345 sym_name, reloc_name,
15346 orig_rel.r_addend,
15347 input_bfd, input_section,
15348 rel->r_offset);
15349 }
15350 else
15351 {
15352 info->callbacks->einfo
15353 /* xgettext:c-format */
15354 (_("%H: %s against `%T': error %d\n"),
15355 input_bfd, input_section, rel->r_offset,
15356 reloc_name, sym_name, (int) r);
15357 ret = FALSE;
15358 }
15359 if (more_info != NULL)
15360 free (more_info);
15361 }
15362 copy_reloc:
15363 if (wrel != rel)
15364 *wrel = *rel;
15365 }
15366
15367 if (wrel != rel)
15368 {
15369 Elf_Internal_Shdr *rel_hdr;
15370 size_t deleted = rel - wrel;
15371
15372 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15373 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15374 if (rel_hdr->sh_size == 0)
15375 {
15376 /* It is too late to remove an empty reloc section. Leave
15377 one NONE reloc.
15378 ??? What is wrong with an empty section??? */
15379 rel_hdr->sh_size = rel_hdr->sh_entsize;
15380 deleted -= 1;
15381 }
15382 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15383 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15384 input_section->reloc_count -= deleted;
15385 }
15386
15387 /* If we're emitting relocations, then shortly after this function
15388 returns, reloc offsets and addends for this section will be
15389 adjusted. Worse, reloc symbol indices will be for the output
15390 file rather than the input. Save a copy of the relocs for
15391 opd_entry_value. */
15392 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15393 {
15394 bfd_size_type amt;
15395 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15396 rel = bfd_alloc (input_bfd, amt);
15397 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15398 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15399 if (rel == NULL)
15400 return FALSE;
15401 memcpy (rel, relocs, amt);
15402 }
15403 return ret;
15404 }
15405
15406 /* Adjust the value of any local symbols in opd sections. */
15407
15408 static int
15409 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15410 const char *name ATTRIBUTE_UNUSED,
15411 Elf_Internal_Sym *elfsym,
15412 asection *input_sec,
15413 struct elf_link_hash_entry *h)
15414 {
15415 struct _opd_sec_data *opd;
15416 long adjust;
15417 bfd_vma value;
15418
15419 if (h != NULL)
15420 return 1;
15421
15422 opd = get_opd_info (input_sec);
15423 if (opd == NULL || opd->adjust == NULL)
15424 return 1;
15425
15426 value = elfsym->st_value - input_sec->output_offset;
15427 if (!bfd_link_relocatable (info))
15428 value -= input_sec->output_section->vma;
15429
15430 adjust = opd->adjust[OPD_NDX (value)];
15431 if (adjust == -1)
15432 return 2;
15433
15434 elfsym->st_value += adjust;
15435 return 1;
15436 }
15437
15438 /* Finish up dynamic symbol handling. We set the contents of various
15439 dynamic sections here. */
15440
15441 static bfd_boolean
15442 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15443 struct bfd_link_info *info,
15444 struct elf_link_hash_entry *h,
15445 Elf_Internal_Sym *sym)
15446 {
15447 struct ppc_link_hash_table *htab;
15448 struct plt_entry *ent;
15449 Elf_Internal_Rela rela;
15450 bfd_byte *loc;
15451
15452 htab = ppc_hash_table (info);
15453 if (htab == NULL)
15454 return FALSE;
15455
15456 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15457 if (ent->plt.offset != (bfd_vma) -1)
15458 {
15459 /* This symbol has an entry in the procedure linkage
15460 table. Set it up. */
15461 if (!htab->elf.dynamic_sections_created
15462 || h->dynindx == -1)
15463 {
15464 BFD_ASSERT (h->type == STT_GNU_IFUNC
15465 && h->def_regular
15466 && (h->root.type == bfd_link_hash_defined
15467 || h->root.type == bfd_link_hash_defweak));
15468 rela.r_offset = (htab->elf.iplt->output_section->vma
15469 + htab->elf.iplt->output_offset
15470 + ent->plt.offset);
15471 if (htab->opd_abi)
15472 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15473 else
15474 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15475 rela.r_addend = (h->root.u.def.value
15476 + h->root.u.def.section->output_offset
15477 + h->root.u.def.section->output_section->vma
15478 + ent->addend);
15479 loc = (htab->elf.irelplt->contents
15480 + (htab->elf.irelplt->reloc_count++
15481 * sizeof (Elf64_External_Rela)));
15482 htab->local_ifunc_resolver = 1;
15483 }
15484 else
15485 {
15486 rela.r_offset = (htab->elf.splt->output_section->vma
15487 + htab->elf.splt->output_offset
15488 + ent->plt.offset);
15489 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15490 rela.r_addend = ent->addend;
15491 loc = (htab->elf.srelplt->contents
15492 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15493 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15494 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
15495 htab->maybe_local_ifunc_resolver = 1;
15496 }
15497 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15498
15499 if (!htab->opd_abi)
15500 {
15501 if (!h->def_regular)
15502 {
15503 /* Mark the symbol as undefined, rather than as
15504 defined in glink. Leave the value if there were
15505 any relocations where pointer equality matters
15506 (this is a clue for the dynamic linker, to make
15507 function pointer comparisons work between an
15508 application and shared library), otherwise set it
15509 to zero. */
15510 sym->st_shndx = SHN_UNDEF;
15511 if (!h->pointer_equality_needed)
15512 sym->st_value = 0;
15513 else if (!h->ref_regular_nonweak)
15514 {
15515 /* This breaks function pointer comparisons, but
15516 that is better than breaking tests for a NULL
15517 function pointer. */
15518 sym->st_value = 0;
15519 }
15520 }
15521 }
15522 }
15523
15524 if (h->needs_copy)
15525 {
15526 /* This symbol needs a copy reloc. Set it up. */
15527 asection *srel;
15528
15529 if (h->dynindx == -1
15530 || (h->root.type != bfd_link_hash_defined
15531 && h->root.type != bfd_link_hash_defweak)
15532 || htab->elf.srelbss == NULL
15533 || htab->elf.sreldynrelro == NULL)
15534 abort ();
15535
15536 rela.r_offset = (h->root.u.def.value
15537 + h->root.u.def.section->output_section->vma
15538 + h->root.u.def.section->output_offset);
15539 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15540 rela.r_addend = 0;
15541 if (h->root.u.def.section == htab->elf.sdynrelro)
15542 srel = htab->elf.sreldynrelro;
15543 else
15544 srel = htab->elf.srelbss;
15545 loc = srel->contents;
15546 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15547 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15548 }
15549
15550 return TRUE;
15551 }
15552
15553 /* Used to decide how to sort relocs in an optimal manner for the
15554 dynamic linker, before writing them out. */
15555
15556 static enum elf_reloc_type_class
15557 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15558 const asection *rel_sec,
15559 const Elf_Internal_Rela *rela)
15560 {
15561 enum elf_ppc64_reloc_type r_type;
15562 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15563
15564 if (rel_sec == htab->elf.irelplt)
15565 return reloc_class_ifunc;
15566
15567 r_type = ELF64_R_TYPE (rela->r_info);
15568 switch (r_type)
15569 {
15570 case R_PPC64_RELATIVE:
15571 return reloc_class_relative;
15572 case R_PPC64_JMP_SLOT:
15573 return reloc_class_plt;
15574 case R_PPC64_COPY:
15575 return reloc_class_copy;
15576 default:
15577 return reloc_class_normal;
15578 }
15579 }
15580
15581 /* Finish up the dynamic sections. */
15582
15583 static bfd_boolean
15584 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15585 struct bfd_link_info *info)
15586 {
15587 struct ppc_link_hash_table *htab;
15588 bfd *dynobj;
15589 asection *sdyn;
15590
15591 htab = ppc_hash_table (info);
15592 if (htab == NULL)
15593 return FALSE;
15594
15595 dynobj = htab->elf.dynobj;
15596 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15597
15598 if (htab->elf.dynamic_sections_created)
15599 {
15600 Elf64_External_Dyn *dyncon, *dynconend;
15601
15602 if (sdyn == NULL || htab->elf.sgot == NULL)
15603 abort ();
15604
15605 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15606 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15607 for (; dyncon < dynconend; dyncon++)
15608 {
15609 Elf_Internal_Dyn dyn;
15610 asection *s;
15611
15612 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15613
15614 switch (dyn.d_tag)
15615 {
15616 default:
15617 continue;
15618
15619 case DT_PPC64_GLINK:
15620 s = htab->glink;
15621 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15622 /* We stupidly defined DT_PPC64_GLINK to be the start
15623 of glink rather than the first entry point, which is
15624 what ld.so needs, and now have a bigger stub to
15625 support automatic multiple TOCs. */
15626 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15627 break;
15628
15629 case DT_PPC64_OPD:
15630 s = bfd_get_section_by_name (output_bfd, ".opd");
15631 if (s == NULL)
15632 continue;
15633 dyn.d_un.d_ptr = s->vma;
15634 break;
15635
15636 case DT_PPC64_OPT:
15637 if (htab->do_multi_toc && htab->multi_toc_needed)
15638 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15639 break;
15640
15641 case DT_PPC64_OPDSZ:
15642 s = bfd_get_section_by_name (output_bfd, ".opd");
15643 if (s == NULL)
15644 continue;
15645 dyn.d_un.d_val = s->size;
15646 break;
15647
15648 case DT_PLTGOT:
15649 s = htab->elf.splt;
15650 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15651 break;
15652
15653 case DT_JMPREL:
15654 s = htab->elf.srelplt;
15655 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15656 break;
15657
15658 case DT_PLTRELSZ:
15659 dyn.d_un.d_val = htab->elf.srelplt->size;
15660 break;
15661
15662 case DT_TEXTREL:
15663 if (htab->local_ifunc_resolver)
15664 info->callbacks->einfo
15665 (_("%X%P: text relocations and GNU indirect "
15666 "functions will result in a segfault at runtime\n"));
15667 else if (htab->maybe_local_ifunc_resolver)
15668 info->callbacks->einfo
15669 (_("%P: warning: text relocations and GNU indirect "
15670 "functions may result in a segfault at runtime\n"));
15671 continue;
15672 }
15673
15674 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15675 }
15676 }
15677
15678 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0
15679 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
15680 {
15681 /* Fill in the first entry in the global offset table.
15682 We use it to hold the link-time TOCbase. */
15683 bfd_put_64 (output_bfd,
15684 elf_gp (output_bfd) + TOC_BASE_OFF,
15685 htab->elf.sgot->contents);
15686
15687 /* Set .got entry size. */
15688 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15689 }
15690
15691 if (htab->elf.splt != NULL && htab->elf.splt->size != 0
15692 && htab->elf.splt->output_section != bfd_abs_section_ptr)
15693 {
15694 /* Set .plt entry size. */
15695 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15696 = PLT_ENTRY_SIZE (htab);
15697 }
15698
15699 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15700 brlt ourselves if emitrelocations. */
15701 if (htab->brlt != NULL
15702 && htab->brlt->reloc_count != 0
15703 && !_bfd_elf_link_output_relocs (output_bfd,
15704 htab->brlt,
15705 elf_section_data (htab->brlt)->rela.hdr,
15706 elf_section_data (htab->brlt)->relocs,
15707 NULL))
15708 return FALSE;
15709
15710 if (htab->glink != NULL
15711 && htab->glink->reloc_count != 0
15712 && !_bfd_elf_link_output_relocs (output_bfd,
15713 htab->glink,
15714 elf_section_data (htab->glink)->rela.hdr,
15715 elf_section_data (htab->glink)->relocs,
15716 NULL))
15717 return FALSE;
15718
15719 if (htab->glink_eh_frame != NULL
15720 && htab->glink_eh_frame->size != 0)
15721 {
15722 bfd_vma val;
15723 bfd_byte *p;
15724 asection *stub_sec;
15725 size_t align = 4;
15726
15727 p = htab->glink_eh_frame->contents;
15728 p += (sizeof (glink_eh_frame_cie) + align - 1) & -align;
15729 for (stub_sec = htab->params->stub_bfd->sections;
15730 stub_sec != NULL;
15731 stub_sec = stub_sec->next)
15732 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15733 {
15734 /* FDE length. */
15735 p += 4;
15736 /* CIE pointer. */
15737 p += 4;
15738 /* Offset to stub section. */
15739 val = (stub_sec->output_section->vma
15740 + stub_sec->output_offset);
15741 val -= (htab->glink_eh_frame->output_section->vma
15742 + htab->glink_eh_frame->output_offset
15743 + (p - htab->glink_eh_frame->contents));
15744 if (val + 0x80000000 > 0xffffffff)
15745 {
15746 info->callbacks->einfo
15747 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15748 stub_sec->name);
15749 return FALSE;
15750 }
15751 bfd_put_32 (dynobj, val, p);
15752 p += 4;
15753 /* stub section size. */
15754 p += 4;
15755 /* Augmentation. */
15756 p += 1;
15757 /* Pad. */
15758 p += ((17 + align - 1) & -align) - 17;
15759 }
15760 if (htab->glink != NULL && htab->glink->size != 0)
15761 {
15762 /* FDE length. */
15763 p += 4;
15764 /* CIE pointer. */
15765 p += 4;
15766 /* Offset to .glink. */
15767 val = (htab->glink->output_section->vma
15768 + htab->glink->output_offset
15769 + 8);
15770 val -= (htab->glink_eh_frame->output_section->vma
15771 + htab->glink_eh_frame->output_offset
15772 + (p - htab->glink_eh_frame->contents));
15773 if (val + 0x80000000 > 0xffffffff)
15774 {
15775 info->callbacks->einfo
15776 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15777 htab->glink->name);
15778 return FALSE;
15779 }
15780 bfd_put_32 (dynobj, val, p);
15781 p += 4;
15782 /* .glink size. */
15783 p += 4;
15784 /* Augmentation. */
15785 p += 1;
15786 /* Ops. */
15787 p += 7;
15788 p += ((24 + align - 1) & -align) - 24;
15789 }
15790
15791 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15792 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15793 htab->glink_eh_frame,
15794 htab->glink_eh_frame->contents))
15795 return FALSE;
15796 }
15797
15798 /* We need to handle writing out multiple GOT sections ourselves,
15799 since we didn't add them to DYNOBJ. We know dynobj is the first
15800 bfd. */
15801 while ((dynobj = dynobj->link.next) != NULL)
15802 {
15803 asection *s;
15804
15805 if (!is_ppc64_elf (dynobj))
15806 continue;
15807
15808 s = ppc64_elf_tdata (dynobj)->got;
15809 if (s != NULL
15810 && s->size != 0
15811 && s->output_section != bfd_abs_section_ptr
15812 && !bfd_set_section_contents (output_bfd, s->output_section,
15813 s->contents, s->output_offset,
15814 s->size))
15815 return FALSE;
15816 s = ppc64_elf_tdata (dynobj)->relgot;
15817 if (s != NULL
15818 && s->size != 0
15819 && s->output_section != bfd_abs_section_ptr
15820 && !bfd_set_section_contents (output_bfd, s->output_section,
15821 s->contents, s->output_offset,
15822 s->size))
15823 return FALSE;
15824 }
15825
15826 return TRUE;
15827 }
15828
15829 #include "elf64-target.h"
15830
15831 /* FreeBSD support */
15832
15833 #undef TARGET_LITTLE_SYM
15834 #undef TARGET_LITTLE_NAME
15835
15836 #undef TARGET_BIG_SYM
15837 #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15838 #undef TARGET_BIG_NAME
15839 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15840
15841 #undef ELF_OSABI
15842 #define ELF_OSABI ELFOSABI_FREEBSD
15843
15844 #undef elf64_bed
15845 #define elf64_bed elf64_powerpc_fbsd_bed
15846
15847 #include "elf64-target.h"
15848