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Support R_PPC64_ADDR64_LOCAL
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37 #include "dwarf2.h"
38
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
59
60 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61 #define TARGET_LITTLE_NAME "elf64-powerpcle"
62 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63 #define TARGET_BIG_NAME "elf64-powerpc"
64 #define ELF_ARCH bfd_arch_powerpc
65 #define ELF_TARGET_ID PPC64_ELF_DATA
66 #define ELF_MACHINE_CODE EM_PPC64
67 #define ELF_MAXPAGESIZE 0x10000
68 #define ELF_COMMONPAGESIZE 0x1000
69 #define elf_info_to_howto ppc64_elf_info_to_howto
70
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
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_default_execstack 0
80
81 #define bfd_elf64_mkobject ppc64_elf_mkobject
82 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
85 #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
86 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
87 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
88 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
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
92 #define elf_backend_object_p ppc64_elf_object_p
93 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
94 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
95 #define elf_backend_write_core_note ppc64_elf_write_core_note
96 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
97 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
98 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
99 #define elf_backend_check_directives ppc64_elf_process_dot_syms
100 #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
101 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
102 #define elf_backend_check_relocs ppc64_elf_check_relocs
103 #define elf_backend_gc_keep ppc64_elf_gc_keep
104 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
105 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
106 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
107 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
108 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
109 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
110 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
111 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
112 #define elf_backend_hash_symbol ppc64_elf_hash_symbol
113 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
114 #define elf_backend_action_discarded ppc64_elf_action_discarded
115 #define elf_backend_relocate_section ppc64_elf_relocate_section
116 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
117 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
118 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
119 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
120 #define elf_backend_special_sections ppc64_elf_special_sections
121 #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
122
123 /* The name of the dynamic interpreter. This is put in the .interp
124 section. */
125 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
126
127 /* The size in bytes of an entry in the procedure linkage table. */
128 #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
129
130 /* The initial size of the plt reserved for the dynamic linker. */
131 #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
132
133 /* Offsets to some stack save slots. */
134 #define STK_LR 16
135 #define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
136 /* This one is dodgy. ELFv2 does not have a linker word, so use the
137 CR save slot. Used only by optimised __tls_get_addr call stub,
138 relying on __tls_get_addr_opt not saving CR.. */
139 #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
140
141 /* TOC base pointers offset from start of TOC. */
142 #define TOC_BASE_OFF 0x8000
143
144 /* Offset of tp and dtp pointers from start of TLS block. */
145 #define TP_OFFSET 0x7000
146 #define DTP_OFFSET 0x8000
147
148 /* .plt call stub instructions. The normal stub is like this, but
149 sometimes the .plt entry crosses a 64k boundary and we need to
150 insert an addi to adjust r11. */
151 #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
152 #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
153 #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
154 #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
155 #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
156 #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
157 #define BCTR 0x4e800420 /* bctr */
158
159 #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
160 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
161 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
162
163 #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
164 #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
165 #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
166 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
167 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
168 #define BNECTR 0x4ca20420 /* bnectr+ */
169 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
170
171 #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
172 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
173 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
174
175 #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
176
177 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
178 #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
179
180 /* glink call stub instructions. We enter with the index in R0. */
181 #define GLINK_CALL_STUB_SIZE (16*4)
182 /* 0: */
183 /* .quad plt0-1f */
184 /* __glink: */
185 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
186 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
187 /* 1: */
188 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
189 /* ld %2,(0b-1b)(%11) */
190 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
191 #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
192 /* ld %12,0(%11) */
193 /* ld %2,8(%11) */
194 /* mtctr %12 */
195 /* ld %11,16(%11) */
196 /* bctr */
197 #define MFLR_R0 0x7c0802a6 /* mflr %r0 */
198 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
199 #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
200 #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
201 #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
202
203 /* Pad with this. */
204 #define NOP 0x60000000
205
206 /* Some other nops. */
207 #define CROR_151515 0x4def7b82
208 #define CROR_313131 0x4ffffb82
209
210 /* .glink entries for the first 32k functions are two instructions. */
211 #define LI_R0_0 0x38000000 /* li %r0,0 */
212 #define B_DOT 0x48000000 /* b . */
213
214 /* After that, we need two instructions to load the index, followed by
215 a branch. */
216 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
217 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
218
219 /* Instructions used by the save and restore reg functions. */
220 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
221 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
222 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
223 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
224 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
225 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
226 #define LI_R12_0 0x39800000 /* li %r12,0 */
227 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
228 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
229 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
230 #define BLR 0x4e800020 /* blr */
231
232 /* Since .opd is an array of descriptors and each entry will end up
233 with identical R_PPC64_RELATIVE relocs, there is really no need to
234 propagate .opd relocs; The dynamic linker should be taught to
235 relocate .opd without reloc entries. */
236 #ifndef NO_OPD_RELOCS
237 #define NO_OPD_RELOCS 0
238 #endif
239 \f
240 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
241
242 /* Relocation HOWTO's. */
243 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
244
245 static reloc_howto_type ppc64_elf_howto_raw[] = {
246 /* This reloc does nothing. */
247 HOWTO (R_PPC64_NONE, /* type */
248 0, /* rightshift */
249 2, /* size (0 = byte, 1 = short, 2 = long) */
250 32, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_PPC64_NONE", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* A standard 32 bit relocation. */
262 HOWTO (R_PPC64_ADDR32, /* type */
263 0, /* rightshift */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
265 32, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_bitfield, /* complain_on_overflow */
269 bfd_elf_generic_reloc, /* special_function */
270 "R_PPC64_ADDR32", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0xffffffff, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 /* An absolute 26 bit branch; the lower two bits must be zero.
277 FIXME: we don't check that, we just clear them. */
278 HOWTO (R_PPC64_ADDR24, /* type */
279 0, /* rightshift */
280 2, /* size (0 = byte, 1 = short, 2 = long) */
281 26, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_bitfield, /* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_PPC64_ADDR24", /* name */
287 FALSE, /* partial_inplace */
288 0, /* src_mask */
289 0x03fffffc, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* A standard 16 bit relocation. */
293 HOWTO (R_PPC64_ADDR16, /* type */
294 0, /* rightshift */
295 1, /* size (0 = byte, 1 = short, 2 = long) */
296 16, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_bitfield, /* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_PPC64_ADDR16", /* name */
302 FALSE, /* partial_inplace */
303 0, /* src_mask */
304 0xffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 /* A 16 bit relocation without overflow. */
308 HOWTO (R_PPC64_ADDR16_LO, /* type */
309 0, /* rightshift */
310 1, /* size (0 = byte, 1 = short, 2 = long) */
311 16, /* bitsize */
312 FALSE, /* pc_relative */
313 0, /* bitpos */
314 complain_overflow_dont,/* complain_on_overflow */
315 bfd_elf_generic_reloc, /* special_function */
316 "R_PPC64_ADDR16_LO", /* name */
317 FALSE, /* partial_inplace */
318 0, /* src_mask */
319 0xffff, /* dst_mask */
320 FALSE), /* pcrel_offset */
321
322 /* Bits 16-31 of an address. */
323 HOWTO (R_PPC64_ADDR16_HI, /* type */
324 16, /* rightshift */
325 1, /* size (0 = byte, 1 = short, 2 = long) */
326 16, /* bitsize */
327 FALSE, /* pc_relative */
328 0, /* bitpos */
329 complain_overflow_signed, /* complain_on_overflow */
330 bfd_elf_generic_reloc, /* special_function */
331 "R_PPC64_ADDR16_HI", /* name */
332 FALSE, /* partial_inplace */
333 0, /* src_mask */
334 0xffff, /* dst_mask */
335 FALSE), /* pcrel_offset */
336
337 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
338 bits, treated as a signed number, is negative. */
339 HOWTO (R_PPC64_ADDR16_HA, /* type */
340 16, /* rightshift */
341 1, /* size (0 = byte, 1 = short, 2 = long) */
342 16, /* bitsize */
343 FALSE, /* pc_relative */
344 0, /* bitpos */
345 complain_overflow_signed, /* complain_on_overflow */
346 ppc64_elf_ha_reloc, /* special_function */
347 "R_PPC64_ADDR16_HA", /* name */
348 FALSE, /* partial_inplace */
349 0, /* src_mask */
350 0xffff, /* dst_mask */
351 FALSE), /* pcrel_offset */
352
353 /* An absolute 16 bit branch; the lower two bits must be zero.
354 FIXME: we don't check that, we just clear them. */
355 HOWTO (R_PPC64_ADDR14, /* type */
356 0, /* rightshift */
357 2, /* size (0 = byte, 1 = short, 2 = long) */
358 16, /* bitsize */
359 FALSE, /* pc_relative */
360 0, /* bitpos */
361 complain_overflow_bitfield, /* complain_on_overflow */
362 ppc64_elf_branch_reloc, /* special_function */
363 "R_PPC64_ADDR14", /* name */
364 FALSE, /* partial_inplace */
365 0, /* src_mask */
366 0x0000fffc, /* dst_mask */
367 FALSE), /* pcrel_offset */
368
369 /* An absolute 16 bit branch, for which bit 10 should be set to
370 indicate that the branch is expected to be taken. The lower two
371 bits must be zero. */
372 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
373 0, /* rightshift */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
375 16, /* bitsize */
376 FALSE, /* pc_relative */
377 0, /* bitpos */
378 complain_overflow_bitfield, /* complain_on_overflow */
379 ppc64_elf_brtaken_reloc, /* special_function */
380 "R_PPC64_ADDR14_BRTAKEN",/* name */
381 FALSE, /* partial_inplace */
382 0, /* src_mask */
383 0x0000fffc, /* dst_mask */
384 FALSE), /* pcrel_offset */
385
386 /* An absolute 16 bit branch, for which bit 10 should be set to
387 indicate that the branch is not expected to be taken. The lower
388 two bits must be zero. */
389 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 16, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 ppc64_elf_brtaken_reloc, /* special_function */
397 "R_PPC64_ADDR14_BRNTAKEN",/* name */
398 FALSE, /* partial_inplace */
399 0, /* src_mask */
400 0x0000fffc, /* dst_mask */
401 FALSE), /* pcrel_offset */
402
403 /* A relative 26 bit branch; the lower two bits must be zero. */
404 HOWTO (R_PPC64_REL24, /* type */
405 0, /* rightshift */
406 2, /* size (0 = byte, 1 = short, 2 = long) */
407 26, /* bitsize */
408 TRUE, /* pc_relative */
409 0, /* bitpos */
410 complain_overflow_signed, /* complain_on_overflow */
411 ppc64_elf_branch_reloc, /* special_function */
412 "R_PPC64_REL24", /* name */
413 FALSE, /* partial_inplace */
414 0, /* src_mask */
415 0x03fffffc, /* dst_mask */
416 TRUE), /* pcrel_offset */
417
418 /* A relative 16 bit branch; the lower two bits must be zero. */
419 HOWTO (R_PPC64_REL14, /* type */
420 0, /* rightshift */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 TRUE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_signed, /* complain_on_overflow */
426 ppc64_elf_branch_reloc, /* special_function */
427 "R_PPC64_REL14", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0x0000fffc, /* dst_mask */
431 TRUE), /* pcrel_offset */
432
433 /* A relative 16 bit branch. Bit 10 should be set to indicate that
434 the branch is expected to be taken. The lower two bits must be
435 zero. */
436 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 16, /* bitsize */
440 TRUE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_signed, /* complain_on_overflow */
443 ppc64_elf_brtaken_reloc, /* special_function */
444 "R_PPC64_REL14_BRTAKEN", /* name */
445 FALSE, /* partial_inplace */
446 0, /* src_mask */
447 0x0000fffc, /* dst_mask */
448 TRUE), /* pcrel_offset */
449
450 /* A relative 16 bit branch. Bit 10 should be set to indicate that
451 the branch is not expected to be taken. The lower two bits must
452 be zero. */
453 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
454 0, /* rightshift */
455 2, /* size (0 = byte, 1 = short, 2 = long) */
456 16, /* bitsize */
457 TRUE, /* pc_relative */
458 0, /* bitpos */
459 complain_overflow_signed, /* complain_on_overflow */
460 ppc64_elf_brtaken_reloc, /* special_function */
461 "R_PPC64_REL14_BRNTAKEN",/* name */
462 FALSE, /* partial_inplace */
463 0, /* src_mask */
464 0x0000fffc, /* dst_mask */
465 TRUE), /* pcrel_offset */
466
467 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
468 symbol. */
469 HOWTO (R_PPC64_GOT16, /* type */
470 0, /* rightshift */
471 1, /* size (0 = byte, 1 = short, 2 = long) */
472 16, /* bitsize */
473 FALSE, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_signed, /* complain_on_overflow */
476 ppc64_elf_unhandled_reloc, /* special_function */
477 "R_PPC64_GOT16", /* name */
478 FALSE, /* partial_inplace */
479 0, /* src_mask */
480 0xffff, /* dst_mask */
481 FALSE), /* pcrel_offset */
482
483 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
484 the symbol. */
485 HOWTO (R_PPC64_GOT16_LO, /* type */
486 0, /* rightshift */
487 1, /* size (0 = byte, 1 = short, 2 = long) */
488 16, /* bitsize */
489 FALSE, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_dont, /* complain_on_overflow */
492 ppc64_elf_unhandled_reloc, /* special_function */
493 "R_PPC64_GOT16_LO", /* name */
494 FALSE, /* partial_inplace */
495 0, /* src_mask */
496 0xffff, /* dst_mask */
497 FALSE), /* pcrel_offset */
498
499 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
500 the symbol. */
501 HOWTO (R_PPC64_GOT16_HI, /* type */
502 16, /* rightshift */
503 1, /* size (0 = byte, 1 = short, 2 = long) */
504 16, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_signed,/* complain_on_overflow */
508 ppc64_elf_unhandled_reloc, /* special_function */
509 "R_PPC64_GOT16_HI", /* name */
510 FALSE, /* partial_inplace */
511 0, /* src_mask */
512 0xffff, /* dst_mask */
513 FALSE), /* pcrel_offset */
514
515 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
516 the symbol. */
517 HOWTO (R_PPC64_GOT16_HA, /* type */
518 16, /* rightshift */
519 1, /* size (0 = byte, 1 = short, 2 = long) */
520 16, /* bitsize */
521 FALSE, /* pc_relative */
522 0, /* bitpos */
523 complain_overflow_signed,/* complain_on_overflow */
524 ppc64_elf_unhandled_reloc, /* special_function */
525 "R_PPC64_GOT16_HA", /* name */
526 FALSE, /* partial_inplace */
527 0, /* src_mask */
528 0xffff, /* dst_mask */
529 FALSE), /* pcrel_offset */
530
531 /* This is used only by the dynamic linker. The symbol should exist
532 both in the object being run and in some shared library. The
533 dynamic linker copies the data addressed by the symbol from the
534 shared library into the object, because the object being
535 run has to have the data at some particular address. */
536 HOWTO (R_PPC64_COPY, /* type */
537 0, /* rightshift */
538 0, /* this one is variable size */
539 0, /* bitsize */
540 FALSE, /* pc_relative */
541 0, /* bitpos */
542 complain_overflow_dont, /* complain_on_overflow */
543 ppc64_elf_unhandled_reloc, /* special_function */
544 "R_PPC64_COPY", /* name */
545 FALSE, /* partial_inplace */
546 0, /* src_mask */
547 0, /* dst_mask */
548 FALSE), /* pcrel_offset */
549
550 /* Like R_PPC64_ADDR64, but used when setting global offset table
551 entries. */
552 HOWTO (R_PPC64_GLOB_DAT, /* type */
553 0, /* rightshift */
554 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
555 64, /* bitsize */
556 FALSE, /* pc_relative */
557 0, /* bitpos */
558 complain_overflow_dont, /* complain_on_overflow */
559 ppc64_elf_unhandled_reloc, /* special_function */
560 "R_PPC64_GLOB_DAT", /* name */
561 FALSE, /* partial_inplace */
562 0, /* src_mask */
563 ONES (64), /* dst_mask */
564 FALSE), /* pcrel_offset */
565
566 /* Created by the link editor. Marks a procedure linkage table
567 entry for a symbol. */
568 HOWTO (R_PPC64_JMP_SLOT, /* type */
569 0, /* rightshift */
570 0, /* size (0 = byte, 1 = short, 2 = long) */
571 0, /* bitsize */
572 FALSE, /* pc_relative */
573 0, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 ppc64_elf_unhandled_reloc, /* special_function */
576 "R_PPC64_JMP_SLOT", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 0, /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 /* Used only by the dynamic linker. When the object is run, this
583 doubleword64 is set to the load address of the object, plus the
584 addend. */
585 HOWTO (R_PPC64_RELATIVE, /* type */
586 0, /* rightshift */
587 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
588 64, /* bitsize */
589 FALSE, /* pc_relative */
590 0, /* bitpos */
591 complain_overflow_dont, /* complain_on_overflow */
592 bfd_elf_generic_reloc, /* special_function */
593 "R_PPC64_RELATIVE", /* name */
594 FALSE, /* partial_inplace */
595 0, /* src_mask */
596 ONES (64), /* dst_mask */
597 FALSE), /* pcrel_offset */
598
599 /* Like R_PPC64_ADDR32, but may be unaligned. */
600 HOWTO (R_PPC64_UADDR32, /* type */
601 0, /* rightshift */
602 2, /* size (0 = byte, 1 = short, 2 = long) */
603 32, /* bitsize */
604 FALSE, /* pc_relative */
605 0, /* bitpos */
606 complain_overflow_bitfield, /* complain_on_overflow */
607 bfd_elf_generic_reloc, /* special_function */
608 "R_PPC64_UADDR32", /* name */
609 FALSE, /* partial_inplace */
610 0, /* src_mask */
611 0xffffffff, /* dst_mask */
612 FALSE), /* pcrel_offset */
613
614 /* Like R_PPC64_ADDR16, but may be unaligned. */
615 HOWTO (R_PPC64_UADDR16, /* type */
616 0, /* rightshift */
617 1, /* size (0 = byte, 1 = short, 2 = long) */
618 16, /* bitsize */
619 FALSE, /* pc_relative */
620 0, /* bitpos */
621 complain_overflow_bitfield, /* complain_on_overflow */
622 bfd_elf_generic_reloc, /* special_function */
623 "R_PPC64_UADDR16", /* name */
624 FALSE, /* partial_inplace */
625 0, /* src_mask */
626 0xffff, /* dst_mask */
627 FALSE), /* pcrel_offset */
628
629 /* 32-bit PC relative. */
630 HOWTO (R_PPC64_REL32, /* type */
631 0, /* rightshift */
632 2, /* size (0 = byte, 1 = short, 2 = long) */
633 32, /* bitsize */
634 TRUE, /* pc_relative */
635 0, /* bitpos */
636 /* FIXME: Verify. Was complain_overflow_bitfield. */
637 complain_overflow_signed, /* complain_on_overflow */
638 bfd_elf_generic_reloc, /* special_function */
639 "R_PPC64_REL32", /* name */
640 FALSE, /* partial_inplace */
641 0, /* src_mask */
642 0xffffffff, /* dst_mask */
643 TRUE), /* pcrel_offset */
644
645 /* 32-bit relocation to the symbol's procedure linkage table. */
646 HOWTO (R_PPC64_PLT32, /* type */
647 0, /* rightshift */
648 2, /* size (0 = byte, 1 = short, 2 = long) */
649 32, /* bitsize */
650 FALSE, /* pc_relative */
651 0, /* bitpos */
652 complain_overflow_bitfield, /* complain_on_overflow */
653 ppc64_elf_unhandled_reloc, /* special_function */
654 "R_PPC64_PLT32", /* name */
655 FALSE, /* partial_inplace */
656 0, /* src_mask */
657 0xffffffff, /* dst_mask */
658 FALSE), /* pcrel_offset */
659
660 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
661 FIXME: R_PPC64_PLTREL32 not supported. */
662 HOWTO (R_PPC64_PLTREL32, /* type */
663 0, /* rightshift */
664 2, /* size (0 = byte, 1 = short, 2 = long) */
665 32, /* bitsize */
666 TRUE, /* pc_relative */
667 0, /* bitpos */
668 complain_overflow_signed, /* complain_on_overflow */
669 bfd_elf_generic_reloc, /* special_function */
670 "R_PPC64_PLTREL32", /* name */
671 FALSE, /* partial_inplace */
672 0, /* src_mask */
673 0xffffffff, /* dst_mask */
674 TRUE), /* pcrel_offset */
675
676 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
677 the symbol. */
678 HOWTO (R_PPC64_PLT16_LO, /* type */
679 0, /* rightshift */
680 1, /* size (0 = byte, 1 = short, 2 = long) */
681 16, /* bitsize */
682 FALSE, /* pc_relative */
683 0, /* bitpos */
684 complain_overflow_dont, /* complain_on_overflow */
685 ppc64_elf_unhandled_reloc, /* special_function */
686 "R_PPC64_PLT16_LO", /* name */
687 FALSE, /* partial_inplace */
688 0, /* src_mask */
689 0xffff, /* dst_mask */
690 FALSE), /* pcrel_offset */
691
692 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
693 the symbol. */
694 HOWTO (R_PPC64_PLT16_HI, /* type */
695 16, /* rightshift */
696 1, /* size (0 = byte, 1 = short, 2 = long) */
697 16, /* bitsize */
698 FALSE, /* pc_relative */
699 0, /* bitpos */
700 complain_overflow_signed, /* complain_on_overflow */
701 ppc64_elf_unhandled_reloc, /* special_function */
702 "R_PPC64_PLT16_HI", /* name */
703 FALSE, /* partial_inplace */
704 0, /* src_mask */
705 0xffff, /* dst_mask */
706 FALSE), /* pcrel_offset */
707
708 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
709 the symbol. */
710 HOWTO (R_PPC64_PLT16_HA, /* type */
711 16, /* rightshift */
712 1, /* size (0 = byte, 1 = short, 2 = long) */
713 16, /* bitsize */
714 FALSE, /* pc_relative */
715 0, /* bitpos */
716 complain_overflow_signed, /* complain_on_overflow */
717 ppc64_elf_unhandled_reloc, /* special_function */
718 "R_PPC64_PLT16_HA", /* name */
719 FALSE, /* partial_inplace */
720 0, /* src_mask */
721 0xffff, /* dst_mask */
722 FALSE), /* pcrel_offset */
723
724 /* 16-bit section relative relocation. */
725 HOWTO (R_PPC64_SECTOFF, /* type */
726 0, /* rightshift */
727 1, /* size (0 = byte, 1 = short, 2 = long) */
728 16, /* bitsize */
729 FALSE, /* pc_relative */
730 0, /* bitpos */
731 complain_overflow_bitfield, /* complain_on_overflow */
732 ppc64_elf_sectoff_reloc, /* special_function */
733 "R_PPC64_SECTOFF", /* name */
734 FALSE, /* partial_inplace */
735 0, /* src_mask */
736 0xffff, /* dst_mask */
737 FALSE), /* pcrel_offset */
738
739 /* Like R_PPC64_SECTOFF, but no overflow warning. */
740 HOWTO (R_PPC64_SECTOFF_LO, /* type */
741 0, /* rightshift */
742 1, /* size (0 = byte, 1 = short, 2 = long) */
743 16, /* bitsize */
744 FALSE, /* pc_relative */
745 0, /* bitpos */
746 complain_overflow_dont, /* complain_on_overflow */
747 ppc64_elf_sectoff_reloc, /* special_function */
748 "R_PPC64_SECTOFF_LO", /* name */
749 FALSE, /* partial_inplace */
750 0, /* src_mask */
751 0xffff, /* dst_mask */
752 FALSE), /* pcrel_offset */
753
754 /* 16-bit upper half section relative relocation. */
755 HOWTO (R_PPC64_SECTOFF_HI, /* type */
756 16, /* rightshift */
757 1, /* size (0 = byte, 1 = short, 2 = long) */
758 16, /* bitsize */
759 FALSE, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_signed, /* complain_on_overflow */
762 ppc64_elf_sectoff_reloc, /* special_function */
763 "R_PPC64_SECTOFF_HI", /* name */
764 FALSE, /* partial_inplace */
765 0, /* src_mask */
766 0xffff, /* dst_mask */
767 FALSE), /* pcrel_offset */
768
769 /* 16-bit upper half adjusted section relative relocation. */
770 HOWTO (R_PPC64_SECTOFF_HA, /* type */
771 16, /* rightshift */
772 1, /* size (0 = byte, 1 = short, 2 = long) */
773 16, /* bitsize */
774 FALSE, /* pc_relative */
775 0, /* bitpos */
776 complain_overflow_signed, /* complain_on_overflow */
777 ppc64_elf_sectoff_ha_reloc, /* special_function */
778 "R_PPC64_SECTOFF_HA", /* name */
779 FALSE, /* partial_inplace */
780 0, /* src_mask */
781 0xffff, /* dst_mask */
782 FALSE), /* pcrel_offset */
783
784 /* Like R_PPC64_REL24 without touching the two least significant bits. */
785 HOWTO (R_PPC64_REL30, /* type */
786 2, /* rightshift */
787 2, /* size (0 = byte, 1 = short, 2 = long) */
788 30, /* bitsize */
789 TRUE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC64_REL30", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 0xfffffffc, /* dst_mask */
797 TRUE), /* pcrel_offset */
798
799 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
800
801 /* A standard 64-bit relocation. */
802 HOWTO (R_PPC64_ADDR64, /* type */
803 0, /* rightshift */
804 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
805 64, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC64_ADDR64", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 ONES (64), /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* The bits 32-47 of an address. */
817 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
818 32, /* rightshift */
819 1, /* size (0 = byte, 1 = short, 2 = long) */
820 16, /* bitsize */
821 FALSE, /* pc_relative */
822 0, /* bitpos */
823 complain_overflow_dont, /* complain_on_overflow */
824 bfd_elf_generic_reloc, /* special_function */
825 "R_PPC64_ADDR16_HIGHER", /* name */
826 FALSE, /* partial_inplace */
827 0, /* src_mask */
828 0xffff, /* dst_mask */
829 FALSE), /* pcrel_offset */
830
831 /* The bits 32-47 of an address, plus 1 if the contents of the low
832 16 bits, treated as a signed number, is negative. */
833 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
834 32, /* rightshift */
835 1, /* size (0 = byte, 1 = short, 2 = long) */
836 16, /* bitsize */
837 FALSE, /* pc_relative */
838 0, /* bitpos */
839 complain_overflow_dont, /* complain_on_overflow */
840 ppc64_elf_ha_reloc, /* special_function */
841 "R_PPC64_ADDR16_HIGHERA", /* name */
842 FALSE, /* partial_inplace */
843 0, /* src_mask */
844 0xffff, /* dst_mask */
845 FALSE), /* pcrel_offset */
846
847 /* The bits 48-63 of an address. */
848 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
849 48, /* rightshift */
850 1, /* size (0 = byte, 1 = short, 2 = long) */
851 16, /* bitsize */
852 FALSE, /* pc_relative */
853 0, /* bitpos */
854 complain_overflow_dont, /* complain_on_overflow */
855 bfd_elf_generic_reloc, /* special_function */
856 "R_PPC64_ADDR16_HIGHEST", /* name */
857 FALSE, /* partial_inplace */
858 0, /* src_mask */
859 0xffff, /* dst_mask */
860 FALSE), /* pcrel_offset */
861
862 /* The bits 48-63 of an address, plus 1 if the contents of the low
863 16 bits, treated as a signed number, is negative. */
864 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
865 48, /* rightshift */
866 1, /* size (0 = byte, 1 = short, 2 = long) */
867 16, /* bitsize */
868 FALSE, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 ppc64_elf_ha_reloc, /* special_function */
872 "R_PPC64_ADDR16_HIGHESTA", /* name */
873 FALSE, /* partial_inplace */
874 0, /* src_mask */
875 0xffff, /* dst_mask */
876 FALSE), /* pcrel_offset */
877
878 /* Like ADDR64, but may be unaligned. */
879 HOWTO (R_PPC64_UADDR64, /* type */
880 0, /* rightshift */
881 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
882 64, /* bitsize */
883 FALSE, /* pc_relative */
884 0, /* bitpos */
885 complain_overflow_dont, /* complain_on_overflow */
886 bfd_elf_generic_reloc, /* special_function */
887 "R_PPC64_UADDR64", /* name */
888 FALSE, /* partial_inplace */
889 0, /* src_mask */
890 ONES (64), /* dst_mask */
891 FALSE), /* pcrel_offset */
892
893 /* 64-bit relative relocation. */
894 HOWTO (R_PPC64_REL64, /* type */
895 0, /* rightshift */
896 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
897 64, /* bitsize */
898 TRUE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 bfd_elf_generic_reloc, /* special_function */
902 "R_PPC64_REL64", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 ONES (64), /* dst_mask */
906 TRUE), /* pcrel_offset */
907
908 /* 64-bit relocation to the symbol's procedure linkage table. */
909 HOWTO (R_PPC64_PLT64, /* type */
910 0, /* rightshift */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
912 64, /* bitsize */
913 FALSE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_dont, /* complain_on_overflow */
916 ppc64_elf_unhandled_reloc, /* special_function */
917 "R_PPC64_PLT64", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 ONES (64), /* dst_mask */
921 FALSE), /* pcrel_offset */
922
923 /* 64-bit PC relative relocation to the symbol's procedure linkage
924 table. */
925 /* FIXME: R_PPC64_PLTREL64 not supported. */
926 HOWTO (R_PPC64_PLTREL64, /* type */
927 0, /* rightshift */
928 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
929 64, /* bitsize */
930 TRUE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_dont, /* complain_on_overflow */
933 ppc64_elf_unhandled_reloc, /* special_function */
934 "R_PPC64_PLTREL64", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 ONES (64), /* dst_mask */
938 TRUE), /* pcrel_offset */
939
940 /* 16 bit TOC-relative relocation. */
941
942 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
943 HOWTO (R_PPC64_TOC16, /* type */
944 0, /* rightshift */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
946 16, /* bitsize */
947 FALSE, /* pc_relative */
948 0, /* bitpos */
949 complain_overflow_signed, /* complain_on_overflow */
950 ppc64_elf_toc_reloc, /* special_function */
951 "R_PPC64_TOC16", /* name */
952 FALSE, /* partial_inplace */
953 0, /* src_mask */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
956
957 /* 16 bit TOC-relative relocation without overflow. */
958
959 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
960 HOWTO (R_PPC64_TOC16_LO, /* type */
961 0, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_dont, /* complain_on_overflow */
967 ppc64_elf_toc_reloc, /* special_function */
968 "R_PPC64_TOC16_LO", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* 16 bit TOC-relative relocation, high 16 bits. */
975
976 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
977 HOWTO (R_PPC64_TOC16_HI, /* type */
978 16, /* rightshift */
979 1, /* size (0 = byte, 1 = short, 2 = long) */
980 16, /* bitsize */
981 FALSE, /* pc_relative */
982 0, /* bitpos */
983 complain_overflow_signed, /* complain_on_overflow */
984 ppc64_elf_toc_reloc, /* special_function */
985 "R_PPC64_TOC16_HI", /* name */
986 FALSE, /* partial_inplace */
987 0, /* src_mask */
988 0xffff, /* dst_mask */
989 FALSE), /* pcrel_offset */
990
991 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
992 contents of the low 16 bits, treated as a signed number, is
993 negative. */
994
995 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
996 HOWTO (R_PPC64_TOC16_HA, /* type */
997 16, /* rightshift */
998 1, /* size (0 = byte, 1 = short, 2 = long) */
999 16, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_signed, /* complain_on_overflow */
1003 ppc64_elf_toc_ha_reloc, /* special_function */
1004 "R_PPC64_TOC16_HA", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 0xffff, /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1011
1012 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1013 HOWTO (R_PPC64_TOC, /* type */
1014 0, /* rightshift */
1015 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1016 64, /* bitsize */
1017 FALSE, /* pc_relative */
1018 0, /* bitpos */
1019 complain_overflow_bitfield, /* complain_on_overflow */
1020 ppc64_elf_toc64_reloc, /* special_function */
1021 "R_PPC64_TOC", /* name */
1022 FALSE, /* partial_inplace */
1023 0, /* src_mask */
1024 ONES (64), /* dst_mask */
1025 FALSE), /* pcrel_offset */
1026
1027 /* Like R_PPC64_GOT16, but also informs the link editor that the
1028 value to relocate may (!) refer to a PLT entry which the link
1029 editor (a) may replace with the symbol value. If the link editor
1030 is unable to fully resolve the symbol, it may (b) create a PLT
1031 entry and store the address to the new PLT entry in the GOT.
1032 This permits lazy resolution of function symbols at run time.
1033 The link editor may also skip all of this and just (c) emit a
1034 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1035 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1036 HOWTO (R_PPC64_PLTGOT16, /* type */
1037 0, /* rightshift */
1038 1, /* size (0 = byte, 1 = short, 2 = long) */
1039 16, /* bitsize */
1040 FALSE, /* pc_relative */
1041 0, /* bitpos */
1042 complain_overflow_signed, /* complain_on_overflow */
1043 ppc64_elf_unhandled_reloc, /* special_function */
1044 "R_PPC64_PLTGOT16", /* name */
1045 FALSE, /* partial_inplace */
1046 0, /* src_mask */
1047 0xffff, /* dst_mask */
1048 FALSE), /* pcrel_offset */
1049
1050 /* Like R_PPC64_PLTGOT16, but without overflow. */
1051 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1052 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1053 0, /* rightshift */
1054 1, /* size (0 = byte, 1 = short, 2 = long) */
1055 16, /* bitsize */
1056 FALSE, /* pc_relative */
1057 0, /* bitpos */
1058 complain_overflow_dont, /* complain_on_overflow */
1059 ppc64_elf_unhandled_reloc, /* special_function */
1060 "R_PPC64_PLTGOT16_LO", /* name */
1061 FALSE, /* partial_inplace */
1062 0, /* src_mask */
1063 0xffff, /* dst_mask */
1064 FALSE), /* pcrel_offset */
1065
1066 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1067 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1068 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1069 16, /* rightshift */
1070 1, /* size (0 = byte, 1 = short, 2 = long) */
1071 16, /* bitsize */
1072 FALSE, /* pc_relative */
1073 0, /* bitpos */
1074 complain_overflow_signed, /* complain_on_overflow */
1075 ppc64_elf_unhandled_reloc, /* special_function */
1076 "R_PPC64_PLTGOT16_HI", /* name */
1077 FALSE, /* partial_inplace */
1078 0, /* src_mask */
1079 0xffff, /* dst_mask */
1080 FALSE), /* pcrel_offset */
1081
1082 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1083 1 if the contents of the low 16 bits, treated as a signed number,
1084 is negative. */
1085 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1086 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1087 16, /* rightshift */
1088 1, /* size (0 = byte, 1 = short, 2 = long) */
1089 16, /* bitsize */
1090 FALSE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_signed, /* complain_on_overflow */
1093 ppc64_elf_unhandled_reloc, /* special_function */
1094 "R_PPC64_PLTGOT16_HA", /* name */
1095 FALSE, /* partial_inplace */
1096 0, /* src_mask */
1097 0xffff, /* dst_mask */
1098 FALSE), /* pcrel_offset */
1099
1100 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1101 HOWTO (R_PPC64_ADDR16_DS, /* type */
1102 0, /* rightshift */
1103 1, /* size (0 = byte, 1 = short, 2 = long) */
1104 16, /* bitsize */
1105 FALSE, /* pc_relative */
1106 0, /* bitpos */
1107 complain_overflow_bitfield, /* complain_on_overflow */
1108 bfd_elf_generic_reloc, /* special_function */
1109 "R_PPC64_ADDR16_DS", /* name */
1110 FALSE, /* partial_inplace */
1111 0, /* src_mask */
1112 0xfffc, /* dst_mask */
1113 FALSE), /* pcrel_offset */
1114
1115 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1116 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1117 0, /* rightshift */
1118 1, /* size (0 = byte, 1 = short, 2 = long) */
1119 16, /* bitsize */
1120 FALSE, /* pc_relative */
1121 0, /* bitpos */
1122 complain_overflow_dont,/* complain_on_overflow */
1123 bfd_elf_generic_reloc, /* special_function */
1124 "R_PPC64_ADDR16_LO_DS",/* name */
1125 FALSE, /* partial_inplace */
1126 0, /* src_mask */
1127 0xfffc, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1129
1130 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1131 HOWTO (R_PPC64_GOT16_DS, /* type */
1132 0, /* rightshift */
1133 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 16, /* bitsize */
1135 FALSE, /* pc_relative */
1136 0, /* bitpos */
1137 complain_overflow_signed, /* complain_on_overflow */
1138 ppc64_elf_unhandled_reloc, /* special_function */
1139 "R_PPC64_GOT16_DS", /* name */
1140 FALSE, /* partial_inplace */
1141 0, /* src_mask */
1142 0xfffc, /* dst_mask */
1143 FALSE), /* pcrel_offset */
1144
1145 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1146 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1147 0, /* rightshift */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1149 16, /* bitsize */
1150 FALSE, /* pc_relative */
1151 0, /* bitpos */
1152 complain_overflow_dont, /* complain_on_overflow */
1153 ppc64_elf_unhandled_reloc, /* special_function */
1154 "R_PPC64_GOT16_LO_DS", /* name */
1155 FALSE, /* partial_inplace */
1156 0, /* src_mask */
1157 0xfffc, /* dst_mask */
1158 FALSE), /* pcrel_offset */
1159
1160 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1161 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1162 0, /* rightshift */
1163 1, /* size (0 = byte, 1 = short, 2 = long) */
1164 16, /* bitsize */
1165 FALSE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_dont, /* complain_on_overflow */
1168 ppc64_elf_unhandled_reloc, /* special_function */
1169 "R_PPC64_PLT16_LO_DS", /* name */
1170 FALSE, /* partial_inplace */
1171 0, /* src_mask */
1172 0xfffc, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1174
1175 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1176 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1177 0, /* rightshift */
1178 1, /* size (0 = byte, 1 = short, 2 = long) */
1179 16, /* bitsize */
1180 FALSE, /* pc_relative */
1181 0, /* bitpos */
1182 complain_overflow_bitfield, /* complain_on_overflow */
1183 ppc64_elf_sectoff_reloc, /* special_function */
1184 "R_PPC64_SECTOFF_DS", /* name */
1185 FALSE, /* partial_inplace */
1186 0, /* src_mask */
1187 0xfffc, /* dst_mask */
1188 FALSE), /* pcrel_offset */
1189
1190 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1191 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1192 0, /* rightshift */
1193 1, /* size (0 = byte, 1 = short, 2 = long) */
1194 16, /* bitsize */
1195 FALSE, /* pc_relative */
1196 0, /* bitpos */
1197 complain_overflow_dont, /* complain_on_overflow */
1198 ppc64_elf_sectoff_reloc, /* special_function */
1199 "R_PPC64_SECTOFF_LO_DS",/* name */
1200 FALSE, /* partial_inplace */
1201 0, /* src_mask */
1202 0xfffc, /* dst_mask */
1203 FALSE), /* pcrel_offset */
1204
1205 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1206 HOWTO (R_PPC64_TOC16_DS, /* type */
1207 0, /* rightshift */
1208 1, /* size (0 = byte, 1 = short, 2 = long) */
1209 16, /* bitsize */
1210 FALSE, /* pc_relative */
1211 0, /* bitpos */
1212 complain_overflow_signed, /* complain_on_overflow */
1213 ppc64_elf_toc_reloc, /* special_function */
1214 "R_PPC64_TOC16_DS", /* name */
1215 FALSE, /* partial_inplace */
1216 0, /* src_mask */
1217 0xfffc, /* dst_mask */
1218 FALSE), /* pcrel_offset */
1219
1220 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1221 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1222 0, /* rightshift */
1223 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 16, /* bitsize */
1225 FALSE, /* pc_relative */
1226 0, /* bitpos */
1227 complain_overflow_dont, /* complain_on_overflow */
1228 ppc64_elf_toc_reloc, /* special_function */
1229 "R_PPC64_TOC16_LO_DS", /* name */
1230 FALSE, /* partial_inplace */
1231 0, /* src_mask */
1232 0xfffc, /* dst_mask */
1233 FALSE), /* pcrel_offset */
1234
1235 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1236 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1237 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1238 0, /* rightshift */
1239 1, /* size (0 = byte, 1 = short, 2 = long) */
1240 16, /* bitsize */
1241 FALSE, /* pc_relative */
1242 0, /* bitpos */
1243 complain_overflow_signed, /* complain_on_overflow */
1244 ppc64_elf_unhandled_reloc, /* special_function */
1245 "R_PPC64_PLTGOT16_DS", /* name */
1246 FALSE, /* partial_inplace */
1247 0, /* src_mask */
1248 0xfffc, /* dst_mask */
1249 FALSE), /* pcrel_offset */
1250
1251 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1252 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1253 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1254 0, /* rightshift */
1255 1, /* size (0 = byte, 1 = short, 2 = long) */
1256 16, /* bitsize */
1257 FALSE, /* pc_relative */
1258 0, /* bitpos */
1259 complain_overflow_dont, /* complain_on_overflow */
1260 ppc64_elf_unhandled_reloc, /* special_function */
1261 "R_PPC64_PLTGOT16_LO_DS",/* name */
1262 FALSE, /* partial_inplace */
1263 0, /* src_mask */
1264 0xfffc, /* dst_mask */
1265 FALSE), /* pcrel_offset */
1266
1267 /* Marker relocs for TLS. */
1268 HOWTO (R_PPC64_TLS,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLS", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 HOWTO (R_PPC64_TLSGD,
1283 0, /* rightshift */
1284 2, /* size (0 = byte, 1 = short, 2 = long) */
1285 32, /* bitsize */
1286 FALSE, /* pc_relative */
1287 0, /* bitpos */
1288 complain_overflow_dont, /* complain_on_overflow */
1289 bfd_elf_generic_reloc, /* special_function */
1290 "R_PPC64_TLSGD", /* name */
1291 FALSE, /* partial_inplace */
1292 0, /* src_mask */
1293 0, /* dst_mask */
1294 FALSE), /* pcrel_offset */
1295
1296 HOWTO (R_PPC64_TLSLD,
1297 0, /* rightshift */
1298 2, /* size (0 = byte, 1 = short, 2 = long) */
1299 32, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 bfd_elf_generic_reloc, /* special_function */
1304 "R_PPC64_TLSLD", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 HOWTO (R_PPC64_TOCSAVE,
1311 0, /* rightshift */
1312 2, /* size (0 = byte, 1 = short, 2 = long) */
1313 32, /* bitsize */
1314 FALSE, /* pc_relative */
1315 0, /* bitpos */
1316 complain_overflow_dont, /* complain_on_overflow */
1317 bfd_elf_generic_reloc, /* special_function */
1318 "R_PPC64_TOCSAVE", /* name */
1319 FALSE, /* partial_inplace */
1320 0, /* src_mask */
1321 0, /* dst_mask */
1322 FALSE), /* pcrel_offset */
1323
1324 /* Computes the load module index of the load module that contains the
1325 definition of its TLS sym. */
1326 HOWTO (R_PPC64_DTPMOD64,
1327 0, /* rightshift */
1328 4, /* size (0 = byte, 1 = short, 2 = long) */
1329 64, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPMOD64", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 ONES (64), /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* Computes a dtv-relative displacement, the difference between the value
1341 of sym+add and the base address of the thread-local storage block that
1342 contains the definition of sym, minus 0x8000. */
1343 HOWTO (R_PPC64_DTPREL64,
1344 0, /* rightshift */
1345 4, /* size (0 = byte, 1 = short, 2 = long) */
1346 64, /* bitsize */
1347 FALSE, /* pc_relative */
1348 0, /* bitpos */
1349 complain_overflow_dont, /* complain_on_overflow */
1350 ppc64_elf_unhandled_reloc, /* special_function */
1351 "R_PPC64_DTPREL64", /* name */
1352 FALSE, /* partial_inplace */
1353 0, /* src_mask */
1354 ONES (64), /* dst_mask */
1355 FALSE), /* pcrel_offset */
1356
1357 /* A 16 bit dtprel reloc. */
1358 HOWTO (R_PPC64_DTPREL16,
1359 0, /* rightshift */
1360 1, /* size (0 = byte, 1 = short, 2 = long) */
1361 16, /* bitsize */
1362 FALSE, /* pc_relative */
1363 0, /* bitpos */
1364 complain_overflow_signed, /* complain_on_overflow */
1365 ppc64_elf_unhandled_reloc, /* special_function */
1366 "R_PPC64_DTPREL16", /* name */
1367 FALSE, /* partial_inplace */
1368 0, /* src_mask */
1369 0xffff, /* dst_mask */
1370 FALSE), /* pcrel_offset */
1371
1372 /* Like DTPREL16, but no overflow. */
1373 HOWTO (R_PPC64_DTPREL16_LO,
1374 0, /* rightshift */
1375 1, /* size (0 = byte, 1 = short, 2 = long) */
1376 16, /* bitsize */
1377 FALSE, /* pc_relative */
1378 0, /* bitpos */
1379 complain_overflow_dont, /* complain_on_overflow */
1380 ppc64_elf_unhandled_reloc, /* special_function */
1381 "R_PPC64_DTPREL16_LO", /* name */
1382 FALSE, /* partial_inplace */
1383 0, /* src_mask */
1384 0xffff, /* dst_mask */
1385 FALSE), /* pcrel_offset */
1386
1387 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1388 HOWTO (R_PPC64_DTPREL16_HI,
1389 16, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 ppc64_elf_unhandled_reloc, /* special_function */
1396 "R_PPC64_DTPREL16_HI", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1403 HOWTO (R_PPC64_DTPREL16_HA,
1404 16, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 16, /* bitsize */
1407 FALSE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 ppc64_elf_unhandled_reloc, /* special_function */
1411 "R_PPC64_DTPREL16_HA", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xffff, /* dst_mask */
1415 FALSE), /* pcrel_offset */
1416
1417 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1418 HOWTO (R_PPC64_DTPREL16_HIGHER,
1419 32, /* rightshift */
1420 1, /* size (0 = byte, 1 = short, 2 = long) */
1421 16, /* bitsize */
1422 FALSE, /* pc_relative */
1423 0, /* bitpos */
1424 complain_overflow_dont, /* complain_on_overflow */
1425 ppc64_elf_unhandled_reloc, /* special_function */
1426 "R_PPC64_DTPREL16_HIGHER", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xffff, /* dst_mask */
1430 FALSE), /* pcrel_offset */
1431
1432 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1433 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1434 32, /* rightshift */
1435 1, /* size (0 = byte, 1 = short, 2 = long) */
1436 16, /* bitsize */
1437 FALSE, /* pc_relative */
1438 0, /* bitpos */
1439 complain_overflow_dont, /* complain_on_overflow */
1440 ppc64_elf_unhandled_reloc, /* special_function */
1441 "R_PPC64_DTPREL16_HIGHERA", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0xffff, /* dst_mask */
1445 FALSE), /* pcrel_offset */
1446
1447 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1448 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1449 48, /* rightshift */
1450 1, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 ppc64_elf_unhandled_reloc, /* special_function */
1456 "R_PPC64_DTPREL16_HIGHEST", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0xffff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1463 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1464 48, /* rightshift */
1465 1, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 ppc64_elf_unhandled_reloc, /* special_function */
1471 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0xffff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Like DTPREL16, but for insns with a DS field. */
1478 HOWTO (R_PPC64_DTPREL16_DS,
1479 0, /* rightshift */
1480 1, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_signed, /* complain_on_overflow */
1485 ppc64_elf_unhandled_reloc, /* special_function */
1486 "R_PPC64_DTPREL16_DS", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0xfffc, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Like DTPREL16_DS, but no overflow. */
1493 HOWTO (R_PPC64_DTPREL16_LO_DS,
1494 0, /* rightshift */
1495 1, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc64_elf_unhandled_reloc, /* special_function */
1501 "R_PPC64_DTPREL16_LO_DS", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0xfffc, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Computes a tp-relative displacement, the difference between the value of
1508 sym+add and the value of the thread pointer (r13). */
1509 HOWTO (R_PPC64_TPREL64,
1510 0, /* rightshift */
1511 4, /* size (0 = byte, 1 = short, 2 = long) */
1512 64, /* bitsize */
1513 FALSE, /* pc_relative */
1514 0, /* bitpos */
1515 complain_overflow_dont, /* complain_on_overflow */
1516 ppc64_elf_unhandled_reloc, /* special_function */
1517 "R_PPC64_TPREL64", /* name */
1518 FALSE, /* partial_inplace */
1519 0, /* src_mask */
1520 ONES (64), /* dst_mask */
1521 FALSE), /* pcrel_offset */
1522
1523 /* A 16 bit tprel reloc. */
1524 HOWTO (R_PPC64_TPREL16,
1525 0, /* rightshift */
1526 1, /* size (0 = byte, 1 = short, 2 = long) */
1527 16, /* bitsize */
1528 FALSE, /* pc_relative */
1529 0, /* bitpos */
1530 complain_overflow_signed, /* complain_on_overflow */
1531 ppc64_elf_unhandled_reloc, /* special_function */
1532 "R_PPC64_TPREL16", /* name */
1533 FALSE, /* partial_inplace */
1534 0, /* src_mask */
1535 0xffff, /* dst_mask */
1536 FALSE), /* pcrel_offset */
1537
1538 /* Like TPREL16, but no overflow. */
1539 HOWTO (R_PPC64_TPREL16_LO,
1540 0, /* rightshift */
1541 1, /* size (0 = byte, 1 = short, 2 = long) */
1542 16, /* bitsize */
1543 FALSE, /* pc_relative */
1544 0, /* bitpos */
1545 complain_overflow_dont, /* complain_on_overflow */
1546 ppc64_elf_unhandled_reloc, /* special_function */
1547 "R_PPC64_TPREL16_LO", /* name */
1548 FALSE, /* partial_inplace */
1549 0, /* src_mask */
1550 0xffff, /* dst_mask */
1551 FALSE), /* pcrel_offset */
1552
1553 /* Like TPREL16_LO, but next higher group of 16 bits. */
1554 HOWTO (R_PPC64_TPREL16_HI,
1555 16, /* rightshift */
1556 1, /* size (0 = byte, 1 = short, 2 = long) */
1557 16, /* bitsize */
1558 FALSE, /* pc_relative */
1559 0, /* bitpos */
1560 complain_overflow_signed, /* complain_on_overflow */
1561 ppc64_elf_unhandled_reloc, /* special_function */
1562 "R_PPC64_TPREL16_HI", /* name */
1563 FALSE, /* partial_inplace */
1564 0, /* src_mask */
1565 0xffff, /* dst_mask */
1566 FALSE), /* pcrel_offset */
1567
1568 /* Like TPREL16_HI, but adjust for low 16 bits. */
1569 HOWTO (R_PPC64_TPREL16_HA,
1570 16, /* rightshift */
1571 1, /* size (0 = byte, 1 = short, 2 = long) */
1572 16, /* bitsize */
1573 FALSE, /* pc_relative */
1574 0, /* bitpos */
1575 complain_overflow_signed, /* complain_on_overflow */
1576 ppc64_elf_unhandled_reloc, /* special_function */
1577 "R_PPC64_TPREL16_HA", /* name */
1578 FALSE, /* partial_inplace */
1579 0, /* src_mask */
1580 0xffff, /* dst_mask */
1581 FALSE), /* pcrel_offset */
1582
1583 /* Like TPREL16_HI, but next higher group of 16 bits. */
1584 HOWTO (R_PPC64_TPREL16_HIGHER,
1585 32, /* rightshift */
1586 1, /* size (0 = byte, 1 = short, 2 = long) */
1587 16, /* bitsize */
1588 FALSE, /* pc_relative */
1589 0, /* bitpos */
1590 complain_overflow_dont, /* complain_on_overflow */
1591 ppc64_elf_unhandled_reloc, /* special_function */
1592 "R_PPC64_TPREL16_HIGHER", /* name */
1593 FALSE, /* partial_inplace */
1594 0, /* src_mask */
1595 0xffff, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1597
1598 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1599 HOWTO (R_PPC64_TPREL16_HIGHERA,
1600 32, /* rightshift */
1601 1, /* size (0 = byte, 1 = short, 2 = long) */
1602 16, /* bitsize */
1603 FALSE, /* pc_relative */
1604 0, /* bitpos */
1605 complain_overflow_dont, /* complain_on_overflow */
1606 ppc64_elf_unhandled_reloc, /* special_function */
1607 "R_PPC64_TPREL16_HIGHERA", /* name */
1608 FALSE, /* partial_inplace */
1609 0, /* src_mask */
1610 0xffff, /* dst_mask */
1611 FALSE), /* pcrel_offset */
1612
1613 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1614 HOWTO (R_PPC64_TPREL16_HIGHEST,
1615 48, /* rightshift */
1616 1, /* size (0 = byte, 1 = short, 2 = long) */
1617 16, /* bitsize */
1618 FALSE, /* pc_relative */
1619 0, /* bitpos */
1620 complain_overflow_dont, /* complain_on_overflow */
1621 ppc64_elf_unhandled_reloc, /* special_function */
1622 "R_PPC64_TPREL16_HIGHEST", /* name */
1623 FALSE, /* partial_inplace */
1624 0, /* src_mask */
1625 0xffff, /* dst_mask */
1626 FALSE), /* pcrel_offset */
1627
1628 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1629 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1630 48, /* rightshift */
1631 1, /* size (0 = byte, 1 = short, 2 = long) */
1632 16, /* bitsize */
1633 FALSE, /* pc_relative */
1634 0, /* bitpos */
1635 complain_overflow_dont, /* complain_on_overflow */
1636 ppc64_elf_unhandled_reloc, /* special_function */
1637 "R_PPC64_TPREL16_HIGHESTA", /* name */
1638 FALSE, /* partial_inplace */
1639 0, /* src_mask */
1640 0xffff, /* dst_mask */
1641 FALSE), /* pcrel_offset */
1642
1643 /* Like TPREL16, but for insns with a DS field. */
1644 HOWTO (R_PPC64_TPREL16_DS,
1645 0, /* rightshift */
1646 1, /* size (0 = byte, 1 = short, 2 = long) */
1647 16, /* bitsize */
1648 FALSE, /* pc_relative */
1649 0, /* bitpos */
1650 complain_overflow_signed, /* complain_on_overflow */
1651 ppc64_elf_unhandled_reloc, /* special_function */
1652 "R_PPC64_TPREL16_DS", /* name */
1653 FALSE, /* partial_inplace */
1654 0, /* src_mask */
1655 0xfffc, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1657
1658 /* Like TPREL16_DS, but no overflow. */
1659 HOWTO (R_PPC64_TPREL16_LO_DS,
1660 0, /* rightshift */
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1662 16, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_TPREL16_LO_DS", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xfffc, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1674 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1675 to the first entry relative to the TOC base (r2). */
1676 HOWTO (R_PPC64_GOT_TLSGD16,
1677 0, /* rightshift */
1678 1, /* size (0 = byte, 1 = short, 2 = long) */
1679 16, /* bitsize */
1680 FALSE, /* pc_relative */
1681 0, /* bitpos */
1682 complain_overflow_signed, /* complain_on_overflow */
1683 ppc64_elf_unhandled_reloc, /* special_function */
1684 "R_PPC64_GOT_TLSGD16", /* name */
1685 FALSE, /* partial_inplace */
1686 0, /* src_mask */
1687 0xffff, /* dst_mask */
1688 FALSE), /* pcrel_offset */
1689
1690 /* Like GOT_TLSGD16, but no overflow. */
1691 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1692 0, /* rightshift */
1693 1, /* size (0 = byte, 1 = short, 2 = long) */
1694 16, /* bitsize */
1695 FALSE, /* pc_relative */
1696 0, /* bitpos */
1697 complain_overflow_dont, /* complain_on_overflow */
1698 ppc64_elf_unhandled_reloc, /* special_function */
1699 "R_PPC64_GOT_TLSGD16_LO", /* name */
1700 FALSE, /* partial_inplace */
1701 0, /* src_mask */
1702 0xffff, /* dst_mask */
1703 FALSE), /* pcrel_offset */
1704
1705 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1706 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1707 16, /* rightshift */
1708 1, /* size (0 = byte, 1 = short, 2 = long) */
1709 16, /* bitsize */
1710 FALSE, /* pc_relative */
1711 0, /* bitpos */
1712 complain_overflow_signed, /* complain_on_overflow */
1713 ppc64_elf_unhandled_reloc, /* special_function */
1714 "R_PPC64_GOT_TLSGD16_HI", /* name */
1715 FALSE, /* partial_inplace */
1716 0, /* src_mask */
1717 0xffff, /* dst_mask */
1718 FALSE), /* pcrel_offset */
1719
1720 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1721 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1722 16, /* rightshift */
1723 1, /* size (0 = byte, 1 = short, 2 = long) */
1724 16, /* bitsize */
1725 FALSE, /* pc_relative */
1726 0, /* bitpos */
1727 complain_overflow_signed, /* complain_on_overflow */
1728 ppc64_elf_unhandled_reloc, /* special_function */
1729 "R_PPC64_GOT_TLSGD16_HA", /* name */
1730 FALSE, /* partial_inplace */
1731 0, /* src_mask */
1732 0xffff, /* dst_mask */
1733 FALSE), /* pcrel_offset */
1734
1735 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1736 with values (sym+add)@dtpmod and zero, and computes the offset to the
1737 first entry relative to the TOC base (r2). */
1738 HOWTO (R_PPC64_GOT_TLSLD16,
1739 0, /* rightshift */
1740 1, /* size (0 = byte, 1 = short, 2 = long) */
1741 16, /* bitsize */
1742 FALSE, /* pc_relative */
1743 0, /* bitpos */
1744 complain_overflow_signed, /* complain_on_overflow */
1745 ppc64_elf_unhandled_reloc, /* special_function */
1746 "R_PPC64_GOT_TLSLD16", /* name */
1747 FALSE, /* partial_inplace */
1748 0, /* src_mask */
1749 0xffff, /* dst_mask */
1750 FALSE), /* pcrel_offset */
1751
1752 /* Like GOT_TLSLD16, but no overflow. */
1753 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1754 0, /* rightshift */
1755 1, /* size (0 = byte, 1 = short, 2 = long) */
1756 16, /* bitsize */
1757 FALSE, /* pc_relative */
1758 0, /* bitpos */
1759 complain_overflow_dont, /* complain_on_overflow */
1760 ppc64_elf_unhandled_reloc, /* special_function */
1761 "R_PPC64_GOT_TLSLD16_LO", /* name */
1762 FALSE, /* partial_inplace */
1763 0, /* src_mask */
1764 0xffff, /* dst_mask */
1765 FALSE), /* pcrel_offset */
1766
1767 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1768 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1769 16, /* rightshift */
1770 1, /* size (0 = byte, 1 = short, 2 = long) */
1771 16, /* bitsize */
1772 FALSE, /* pc_relative */
1773 0, /* bitpos */
1774 complain_overflow_signed, /* complain_on_overflow */
1775 ppc64_elf_unhandled_reloc, /* special_function */
1776 "R_PPC64_GOT_TLSLD16_HI", /* name */
1777 FALSE, /* partial_inplace */
1778 0, /* src_mask */
1779 0xffff, /* dst_mask */
1780 FALSE), /* pcrel_offset */
1781
1782 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1783 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1784 16, /* rightshift */
1785 1, /* size (0 = byte, 1 = short, 2 = long) */
1786 16, /* bitsize */
1787 FALSE, /* pc_relative */
1788 0, /* bitpos */
1789 complain_overflow_signed, /* complain_on_overflow */
1790 ppc64_elf_unhandled_reloc, /* special_function */
1791 "R_PPC64_GOT_TLSLD16_HA", /* name */
1792 FALSE, /* partial_inplace */
1793 0, /* src_mask */
1794 0xffff, /* dst_mask */
1795 FALSE), /* pcrel_offset */
1796
1797 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1798 the offset to the entry relative to the TOC base (r2). */
1799 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1800 0, /* rightshift */
1801 1, /* size (0 = byte, 1 = short, 2 = long) */
1802 16, /* bitsize */
1803 FALSE, /* pc_relative */
1804 0, /* bitpos */
1805 complain_overflow_signed, /* complain_on_overflow */
1806 ppc64_elf_unhandled_reloc, /* special_function */
1807 "R_PPC64_GOT_DTPREL16_DS", /* name */
1808 FALSE, /* partial_inplace */
1809 0, /* src_mask */
1810 0xfffc, /* dst_mask */
1811 FALSE), /* pcrel_offset */
1812
1813 /* Like GOT_DTPREL16_DS, but no overflow. */
1814 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1815 0, /* rightshift */
1816 1, /* size (0 = byte, 1 = short, 2 = long) */
1817 16, /* bitsize */
1818 FALSE, /* pc_relative */
1819 0, /* bitpos */
1820 complain_overflow_dont, /* complain_on_overflow */
1821 ppc64_elf_unhandled_reloc, /* special_function */
1822 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1823 FALSE, /* partial_inplace */
1824 0, /* src_mask */
1825 0xfffc, /* dst_mask */
1826 FALSE), /* pcrel_offset */
1827
1828 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1829 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1830 16, /* rightshift */
1831 1, /* size (0 = byte, 1 = short, 2 = long) */
1832 16, /* bitsize */
1833 FALSE, /* pc_relative */
1834 0, /* bitpos */
1835 complain_overflow_signed, /* complain_on_overflow */
1836 ppc64_elf_unhandled_reloc, /* special_function */
1837 "R_PPC64_GOT_DTPREL16_HI", /* name */
1838 FALSE, /* partial_inplace */
1839 0, /* src_mask */
1840 0xffff, /* dst_mask */
1841 FALSE), /* pcrel_offset */
1842
1843 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1844 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1845 16, /* rightshift */
1846 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 16, /* bitsize */
1848 FALSE, /* pc_relative */
1849 0, /* bitpos */
1850 complain_overflow_signed, /* complain_on_overflow */
1851 ppc64_elf_unhandled_reloc, /* special_function */
1852 "R_PPC64_GOT_DTPREL16_HA", /* name */
1853 FALSE, /* partial_inplace */
1854 0, /* src_mask */
1855 0xffff, /* dst_mask */
1856 FALSE), /* pcrel_offset */
1857
1858 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1859 offset to the entry relative to the TOC base (r2). */
1860 HOWTO (R_PPC64_GOT_TPREL16_DS,
1861 0, /* rightshift */
1862 1, /* size (0 = byte, 1 = short, 2 = long) */
1863 16, /* bitsize */
1864 FALSE, /* pc_relative */
1865 0, /* bitpos */
1866 complain_overflow_signed, /* complain_on_overflow */
1867 ppc64_elf_unhandled_reloc, /* special_function */
1868 "R_PPC64_GOT_TPREL16_DS", /* name */
1869 FALSE, /* partial_inplace */
1870 0, /* src_mask */
1871 0xfffc, /* dst_mask */
1872 FALSE), /* pcrel_offset */
1873
1874 /* Like GOT_TPREL16_DS, but no overflow. */
1875 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1876 0, /* rightshift */
1877 1, /* size (0 = byte, 1 = short, 2 = long) */
1878 16, /* bitsize */
1879 FALSE, /* pc_relative */
1880 0, /* bitpos */
1881 complain_overflow_dont, /* complain_on_overflow */
1882 ppc64_elf_unhandled_reloc, /* special_function */
1883 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1884 FALSE, /* partial_inplace */
1885 0, /* src_mask */
1886 0xfffc, /* dst_mask */
1887 FALSE), /* pcrel_offset */
1888
1889 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1890 HOWTO (R_PPC64_GOT_TPREL16_HI,
1891 16, /* rightshift */
1892 1, /* size (0 = byte, 1 = short, 2 = long) */
1893 16, /* bitsize */
1894 FALSE, /* pc_relative */
1895 0, /* bitpos */
1896 complain_overflow_signed, /* complain_on_overflow */
1897 ppc64_elf_unhandled_reloc, /* special_function */
1898 "R_PPC64_GOT_TPREL16_HI", /* name */
1899 FALSE, /* partial_inplace */
1900 0, /* src_mask */
1901 0xffff, /* dst_mask */
1902 FALSE), /* pcrel_offset */
1903
1904 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1905 HOWTO (R_PPC64_GOT_TPREL16_HA,
1906 16, /* rightshift */
1907 1, /* size (0 = byte, 1 = short, 2 = long) */
1908 16, /* bitsize */
1909 FALSE, /* pc_relative */
1910 0, /* bitpos */
1911 complain_overflow_signed, /* complain_on_overflow */
1912 ppc64_elf_unhandled_reloc, /* special_function */
1913 "R_PPC64_GOT_TPREL16_HA", /* name */
1914 FALSE, /* partial_inplace */
1915 0, /* src_mask */
1916 0xffff, /* dst_mask */
1917 FALSE), /* pcrel_offset */
1918
1919 HOWTO (R_PPC64_JMP_IREL, /* type */
1920 0, /* rightshift */
1921 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1922 0, /* bitsize */
1923 FALSE, /* pc_relative */
1924 0, /* bitpos */
1925 complain_overflow_dont, /* complain_on_overflow */
1926 ppc64_elf_unhandled_reloc, /* special_function */
1927 "R_PPC64_JMP_IREL", /* name */
1928 FALSE, /* partial_inplace */
1929 0, /* src_mask */
1930 0, /* dst_mask */
1931 FALSE), /* pcrel_offset */
1932
1933 HOWTO (R_PPC64_IRELATIVE, /* type */
1934 0, /* rightshift */
1935 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1936 64, /* bitsize */
1937 FALSE, /* pc_relative */
1938 0, /* bitpos */
1939 complain_overflow_dont, /* complain_on_overflow */
1940 bfd_elf_generic_reloc, /* special_function */
1941 "R_PPC64_IRELATIVE", /* name */
1942 FALSE, /* partial_inplace */
1943 0, /* src_mask */
1944 ONES (64), /* dst_mask */
1945 FALSE), /* pcrel_offset */
1946
1947 /* A 16 bit relative relocation. */
1948 HOWTO (R_PPC64_REL16, /* type */
1949 0, /* rightshift */
1950 1, /* size (0 = byte, 1 = short, 2 = long) */
1951 16, /* bitsize */
1952 TRUE, /* pc_relative */
1953 0, /* bitpos */
1954 complain_overflow_bitfield, /* complain_on_overflow */
1955 bfd_elf_generic_reloc, /* special_function */
1956 "R_PPC64_REL16", /* name */
1957 FALSE, /* partial_inplace */
1958 0, /* src_mask */
1959 0xffff, /* dst_mask */
1960 TRUE), /* pcrel_offset */
1961
1962 /* A 16 bit relative relocation without overflow. */
1963 HOWTO (R_PPC64_REL16_LO, /* type */
1964 0, /* rightshift */
1965 1, /* size (0 = byte, 1 = short, 2 = long) */
1966 16, /* bitsize */
1967 TRUE, /* pc_relative */
1968 0, /* bitpos */
1969 complain_overflow_dont,/* complain_on_overflow */
1970 bfd_elf_generic_reloc, /* special_function */
1971 "R_PPC64_REL16_LO", /* name */
1972 FALSE, /* partial_inplace */
1973 0, /* src_mask */
1974 0xffff, /* dst_mask */
1975 TRUE), /* pcrel_offset */
1976
1977 /* The high order 16 bits of a relative address. */
1978 HOWTO (R_PPC64_REL16_HI, /* type */
1979 16, /* rightshift */
1980 1, /* size (0 = byte, 1 = short, 2 = long) */
1981 16, /* bitsize */
1982 TRUE, /* pc_relative */
1983 0, /* bitpos */
1984 complain_overflow_signed, /* complain_on_overflow */
1985 bfd_elf_generic_reloc, /* special_function */
1986 "R_PPC64_REL16_HI", /* name */
1987 FALSE, /* partial_inplace */
1988 0, /* src_mask */
1989 0xffff, /* dst_mask */
1990 TRUE), /* pcrel_offset */
1991
1992 /* The high order 16 bits of a relative address, plus 1 if the contents of
1993 the low 16 bits, treated as a signed number, is negative. */
1994 HOWTO (R_PPC64_REL16_HA, /* type */
1995 16, /* rightshift */
1996 1, /* size (0 = byte, 1 = short, 2 = long) */
1997 16, /* bitsize */
1998 TRUE, /* pc_relative */
1999 0, /* bitpos */
2000 complain_overflow_signed, /* complain_on_overflow */
2001 ppc64_elf_ha_reloc, /* special_function */
2002 "R_PPC64_REL16_HA", /* name */
2003 FALSE, /* partial_inplace */
2004 0, /* src_mask */
2005 0xffff, /* dst_mask */
2006 TRUE), /* pcrel_offset */
2007
2008 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2009 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2010 16, /* rightshift */
2011 1, /* size (0 = byte, 1 = short, 2 = long) */
2012 16, /* bitsize */
2013 FALSE, /* pc_relative */
2014 0, /* bitpos */
2015 complain_overflow_dont, /* complain_on_overflow */
2016 bfd_elf_generic_reloc, /* special_function */
2017 "R_PPC64_ADDR16_HIGH", /* name */
2018 FALSE, /* partial_inplace */
2019 0, /* src_mask */
2020 0xffff, /* dst_mask */
2021 FALSE), /* pcrel_offset */
2022
2023 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2024 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2025 16, /* rightshift */
2026 1, /* size (0 = byte, 1 = short, 2 = long) */
2027 16, /* bitsize */
2028 FALSE, /* pc_relative */
2029 0, /* bitpos */
2030 complain_overflow_dont, /* complain_on_overflow */
2031 ppc64_elf_ha_reloc, /* special_function */
2032 "R_PPC64_ADDR16_HIGHA", /* name */
2033 FALSE, /* partial_inplace */
2034 0, /* src_mask */
2035 0xffff, /* dst_mask */
2036 FALSE), /* pcrel_offset */
2037
2038 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2039 HOWTO (R_PPC64_DTPREL16_HIGH,
2040 16, /* rightshift */
2041 1, /* size (0 = byte, 1 = short, 2 = long) */
2042 16, /* bitsize */
2043 FALSE, /* pc_relative */
2044 0, /* bitpos */
2045 complain_overflow_dont, /* complain_on_overflow */
2046 ppc64_elf_unhandled_reloc, /* special_function */
2047 "R_PPC64_DTPREL16_HIGH", /* name */
2048 FALSE, /* partial_inplace */
2049 0, /* src_mask */
2050 0xffff, /* dst_mask */
2051 FALSE), /* pcrel_offset */
2052
2053 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2054 HOWTO (R_PPC64_DTPREL16_HIGHA,
2055 16, /* rightshift */
2056 1, /* size (0 = byte, 1 = short, 2 = long) */
2057 16, /* bitsize */
2058 FALSE, /* pc_relative */
2059 0, /* bitpos */
2060 complain_overflow_dont, /* complain_on_overflow */
2061 ppc64_elf_unhandled_reloc, /* special_function */
2062 "R_PPC64_DTPREL16_HIGHA", /* name */
2063 FALSE, /* partial_inplace */
2064 0, /* src_mask */
2065 0xffff, /* dst_mask */
2066 FALSE), /* pcrel_offset */
2067
2068 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2069 HOWTO (R_PPC64_TPREL16_HIGH,
2070 16, /* rightshift */
2071 1, /* size (0 = byte, 1 = short, 2 = long) */
2072 16, /* bitsize */
2073 FALSE, /* pc_relative */
2074 0, /* bitpos */
2075 complain_overflow_dont, /* complain_on_overflow */
2076 ppc64_elf_unhandled_reloc, /* special_function */
2077 "R_PPC64_TPREL16_HIGH", /* name */
2078 FALSE, /* partial_inplace */
2079 0, /* src_mask */
2080 0xffff, /* dst_mask */
2081 FALSE), /* pcrel_offset */
2082
2083 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2084 HOWTO (R_PPC64_TPREL16_HIGHA,
2085 16, /* rightshift */
2086 1, /* size (0 = byte, 1 = short, 2 = long) */
2087 16, /* bitsize */
2088 FALSE, /* pc_relative */
2089 0, /* bitpos */
2090 complain_overflow_dont, /* complain_on_overflow */
2091 ppc64_elf_unhandled_reloc, /* special_function */
2092 "R_PPC64_TPREL16_HIGHA", /* name */
2093 FALSE, /* partial_inplace */
2094 0, /* src_mask */
2095 0xffff, /* dst_mask */
2096 FALSE), /* pcrel_offset */
2097
2098 /* Like ADDR64, but use local entry point of function. */
2099 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2100 0, /* rightshift */
2101 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2102 64, /* bitsize */
2103 FALSE, /* pc_relative */
2104 0, /* bitpos */
2105 complain_overflow_dont, /* complain_on_overflow */
2106 bfd_elf_generic_reloc, /* special_function */
2107 "R_PPC64_ADDR64_LOCAL", /* name */
2108 FALSE, /* partial_inplace */
2109 0, /* src_mask */
2110 ONES (64), /* dst_mask */
2111 FALSE), /* pcrel_offset */
2112
2113 /* GNU extension to record C++ vtable hierarchy. */
2114 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2115 0, /* rightshift */
2116 0, /* size (0 = byte, 1 = short, 2 = long) */
2117 0, /* bitsize */
2118 FALSE, /* pc_relative */
2119 0, /* bitpos */
2120 complain_overflow_dont, /* complain_on_overflow */
2121 NULL, /* special_function */
2122 "R_PPC64_GNU_VTINHERIT", /* name */
2123 FALSE, /* partial_inplace */
2124 0, /* src_mask */
2125 0, /* dst_mask */
2126 FALSE), /* pcrel_offset */
2127
2128 /* GNU extension to record C++ vtable member usage. */
2129 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2130 0, /* rightshift */
2131 0, /* size (0 = byte, 1 = short, 2 = long) */
2132 0, /* bitsize */
2133 FALSE, /* pc_relative */
2134 0, /* bitpos */
2135 complain_overflow_dont, /* complain_on_overflow */
2136 NULL, /* special_function */
2137 "R_PPC64_GNU_VTENTRY", /* name */
2138 FALSE, /* partial_inplace */
2139 0, /* src_mask */
2140 0, /* dst_mask */
2141 FALSE), /* pcrel_offset */
2142 };
2143
2144 \f
2145 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2146 be done. */
2147
2148 static void
2149 ppc_howto_init (void)
2150 {
2151 unsigned int i, type;
2152
2153 for (i = 0;
2154 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2155 i++)
2156 {
2157 type = ppc64_elf_howto_raw[i].type;
2158 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2159 / sizeof (ppc64_elf_howto_table[0])));
2160 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2161 }
2162 }
2163
2164 static reloc_howto_type *
2165 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2166 bfd_reloc_code_real_type code)
2167 {
2168 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2169
2170 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2171 /* Initialize howto table if needed. */
2172 ppc_howto_init ();
2173
2174 switch (code)
2175 {
2176 default:
2177 return NULL;
2178
2179 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2180 break;
2181 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2182 break;
2183 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2184 break;
2185 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2186 break;
2187 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2188 break;
2189 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2190 break;
2191 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2192 break;
2193 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2194 break;
2195 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2196 break;
2197 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2198 break;
2199 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2200 break;
2201 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2202 break;
2203 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2204 break;
2205 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2206 break;
2207 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2208 break;
2209 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2210 break;
2211 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2212 break;
2213 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2214 break;
2215 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2216 break;
2217 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2218 break;
2219 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2220 break;
2221 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2222 break;
2223 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2224 break;
2225 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2226 break;
2227 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2228 break;
2229 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2230 break;
2231 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2232 break;
2233 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2234 break;
2235 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2236 break;
2237 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2238 break;
2239 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2240 break;
2241 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2242 break;
2243 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2244 break;
2245 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2246 break;
2247 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2248 break;
2249 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2250 break;
2251 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2252 break;
2253 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2254 break;
2255 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2256 break;
2257 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2258 break;
2259 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2260 break;
2261 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2262 break;
2263 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2264 break;
2265 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2266 break;
2267 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2268 break;
2269 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2270 break;
2271 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2272 break;
2273 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2274 break;
2275 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2276 break;
2277 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2278 break;
2279 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2280 break;
2281 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2282 break;
2283 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2284 break;
2285 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2286 break;
2287 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2288 break;
2289 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2290 break;
2291 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2292 break;
2293 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2294 break;
2295 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2296 break;
2297 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2298 break;
2299 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2300 break;
2301 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2302 break;
2303 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2304 break;
2305 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2306 break;
2307 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2308 break;
2309 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2310 break;
2311 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2312 break;
2313 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2314 break;
2315 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2316 break;
2317 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2318 break;
2319 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2320 break;
2321 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2322 break;
2323 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2324 break;
2325 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2326 break;
2327 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2328 break;
2329 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2330 break;
2331 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2332 break;
2333 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2334 break;
2335 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2336 break;
2337 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2338 break;
2339 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2340 break;
2341 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2342 break;
2343 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2344 break;
2345 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2346 break;
2347 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2348 break;
2349 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2350 break;
2351 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2352 break;
2353 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2354 break;
2355 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2356 break;
2357 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2358 break;
2359 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2360 break;
2361 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2362 break;
2363 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2364 break;
2365 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2366 break;
2367 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2368 break;
2369 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2370 break;
2371 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2372 break;
2373 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2374 break;
2375 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2376 break;
2377 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2378 break;
2379 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2382 break;
2383 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2384 break;
2385 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2386 break;
2387 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2388 break;
2389 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2390 break;
2391 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2392 break;
2393 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2394 break;
2395 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2396 break;
2397 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2398 break;
2399 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2400 break;
2401 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2402 break;
2403 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2404 break;
2405 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2406 break;
2407 }
2408
2409 return ppc64_elf_howto_table[r];
2410 };
2411
2412 static reloc_howto_type *
2413 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2414 const char *r_name)
2415 {
2416 unsigned int i;
2417
2418 for (i = 0;
2419 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2420 i++)
2421 if (ppc64_elf_howto_raw[i].name != NULL
2422 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2423 return &ppc64_elf_howto_raw[i];
2424
2425 return NULL;
2426 }
2427
2428 /* Set the howto pointer for a PowerPC ELF reloc. */
2429
2430 static void
2431 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2432 Elf_Internal_Rela *dst)
2433 {
2434 unsigned int type;
2435
2436 /* Initialize howto table if needed. */
2437 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2438 ppc_howto_init ();
2439
2440 type = ELF64_R_TYPE (dst->r_info);
2441 if (type >= (sizeof (ppc64_elf_howto_table)
2442 / sizeof (ppc64_elf_howto_table[0])))
2443 {
2444 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2445 abfd, (int) type);
2446 type = R_PPC64_NONE;
2447 }
2448 cache_ptr->howto = ppc64_elf_howto_table[type];
2449 }
2450
2451 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2452
2453 static bfd_reloc_status_type
2454 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2455 void *data, asection *input_section,
2456 bfd *output_bfd, char **error_message)
2457 {
2458 /* If this is a relocatable link (output_bfd test tells us), just
2459 call the generic function. Any adjustment will be done at final
2460 link time. */
2461 if (output_bfd != NULL)
2462 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2463 input_section, output_bfd, error_message);
2464
2465 /* Adjust the addend for sign extension of the low 16 bits.
2466 We won't actually be using the low 16 bits, so trashing them
2467 doesn't matter. */
2468 reloc_entry->addend += 0x8000;
2469 return bfd_reloc_continue;
2470 }
2471
2472 static bfd_reloc_status_type
2473 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2474 void *data, asection *input_section,
2475 bfd *output_bfd, char **error_message)
2476 {
2477 if (output_bfd != NULL)
2478 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2479 input_section, output_bfd, error_message);
2480
2481 if (strcmp (symbol->section->name, ".opd") == 0
2482 && (symbol->section->owner->flags & DYNAMIC) == 0)
2483 {
2484 bfd_vma dest = opd_entry_value (symbol->section,
2485 symbol->value + reloc_entry->addend,
2486 NULL, NULL, FALSE);
2487 if (dest != (bfd_vma) -1)
2488 reloc_entry->addend = dest - (symbol->value
2489 + symbol->section->output_section->vma
2490 + symbol->section->output_offset);
2491 }
2492 return bfd_reloc_continue;
2493 }
2494
2495 static bfd_reloc_status_type
2496 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2497 void *data, asection *input_section,
2498 bfd *output_bfd, char **error_message)
2499 {
2500 long insn;
2501 enum elf_ppc64_reloc_type r_type;
2502 bfd_size_type octets;
2503 /* Assume 'at' branch hints. */
2504 bfd_boolean is_isa_v2 = TRUE;
2505
2506 /* If this is a relocatable link (output_bfd test tells us), just
2507 call the generic function. Any adjustment will be done at final
2508 link time. */
2509 if (output_bfd != NULL)
2510 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2511 input_section, output_bfd, error_message);
2512
2513 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2514 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2515 insn &= ~(0x01 << 21);
2516 r_type = reloc_entry->howto->type;
2517 if (r_type == R_PPC64_ADDR14_BRTAKEN
2518 || r_type == R_PPC64_REL14_BRTAKEN)
2519 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2520
2521 if (is_isa_v2)
2522 {
2523 /* Set 'a' bit. This is 0b00010 in BO field for branch
2524 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2525 for branch on CTR insns (BO == 1a00t or 1a01t). */
2526 if ((insn & (0x14 << 21)) == (0x04 << 21))
2527 insn |= 0x02 << 21;
2528 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2529 insn |= 0x08 << 21;
2530 else
2531 goto out;
2532 }
2533 else
2534 {
2535 bfd_vma target = 0;
2536 bfd_vma from;
2537
2538 if (!bfd_is_com_section (symbol->section))
2539 target = symbol->value;
2540 target += symbol->section->output_section->vma;
2541 target += symbol->section->output_offset;
2542 target += reloc_entry->addend;
2543
2544 from = (reloc_entry->address
2545 + input_section->output_offset
2546 + input_section->output_section->vma);
2547
2548 /* Invert 'y' bit if not the default. */
2549 if ((bfd_signed_vma) (target - from) < 0)
2550 insn ^= 0x01 << 21;
2551 }
2552 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2553 out:
2554 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2555 input_section, output_bfd, error_message);
2556 }
2557
2558 static bfd_reloc_status_type
2559 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2560 void *data, asection *input_section,
2561 bfd *output_bfd, char **error_message)
2562 {
2563 /* If this is a relocatable link (output_bfd test tells us), just
2564 call the generic function. Any adjustment will be done at final
2565 link time. */
2566 if (output_bfd != NULL)
2567 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2568 input_section, output_bfd, error_message);
2569
2570 /* Subtract the symbol section base address. */
2571 reloc_entry->addend -= symbol->section->output_section->vma;
2572 return bfd_reloc_continue;
2573 }
2574
2575 static bfd_reloc_status_type
2576 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2577 void *data, asection *input_section,
2578 bfd *output_bfd, char **error_message)
2579 {
2580 /* If this is a relocatable link (output_bfd test tells us), just
2581 call the generic function. Any adjustment will be done at final
2582 link time. */
2583 if (output_bfd != NULL)
2584 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2585 input_section, output_bfd, error_message);
2586
2587 /* Subtract the symbol section base address. */
2588 reloc_entry->addend -= symbol->section->output_section->vma;
2589
2590 /* Adjust the addend for sign extension of the low 16 bits. */
2591 reloc_entry->addend += 0x8000;
2592 return bfd_reloc_continue;
2593 }
2594
2595 static bfd_reloc_status_type
2596 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2597 void *data, asection *input_section,
2598 bfd *output_bfd, char **error_message)
2599 {
2600 bfd_vma TOCstart;
2601
2602 /* If this is a relocatable link (output_bfd test tells us), just
2603 call the generic function. Any adjustment will be done at final
2604 link time. */
2605 if (output_bfd != NULL)
2606 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2607 input_section, output_bfd, error_message);
2608
2609 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2610 if (TOCstart == 0)
2611 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2612
2613 /* Subtract the TOC base address. */
2614 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2615 return bfd_reloc_continue;
2616 }
2617
2618 static bfd_reloc_status_type
2619 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2620 void *data, asection *input_section,
2621 bfd *output_bfd, char **error_message)
2622 {
2623 bfd_vma TOCstart;
2624
2625 /* If this is a relocatable link (output_bfd test tells us), just
2626 call the generic function. Any adjustment will be done at final
2627 link time. */
2628 if (output_bfd != NULL)
2629 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2630 input_section, output_bfd, error_message);
2631
2632 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2633 if (TOCstart == 0)
2634 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2635
2636 /* Subtract the TOC base address. */
2637 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2638
2639 /* Adjust the addend for sign extension of the low 16 bits. */
2640 reloc_entry->addend += 0x8000;
2641 return bfd_reloc_continue;
2642 }
2643
2644 static bfd_reloc_status_type
2645 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2646 void *data, asection *input_section,
2647 bfd *output_bfd, char **error_message)
2648 {
2649 bfd_vma TOCstart;
2650 bfd_size_type octets;
2651
2652 /* If this is a relocatable link (output_bfd test tells us), just
2653 call the generic function. Any adjustment will be done at final
2654 link time. */
2655 if (output_bfd != NULL)
2656 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2657 input_section, output_bfd, error_message);
2658
2659 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2660 if (TOCstart == 0)
2661 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2662
2663 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2664 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2665 return bfd_reloc_ok;
2666 }
2667
2668 static bfd_reloc_status_type
2669 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2670 void *data, asection *input_section,
2671 bfd *output_bfd, char **error_message)
2672 {
2673 /* If this is a relocatable link (output_bfd test tells us), just
2674 call the generic function. Any adjustment will be done at final
2675 link time. */
2676 if (output_bfd != NULL)
2677 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2678 input_section, output_bfd, error_message);
2679
2680 if (error_message != NULL)
2681 {
2682 static char buf[60];
2683 sprintf (buf, "generic linker can't handle %s",
2684 reloc_entry->howto->name);
2685 *error_message = buf;
2686 }
2687 return bfd_reloc_dangerous;
2688 }
2689
2690 /* Track GOT entries needed for a given symbol. We might need more
2691 than one got entry per symbol. */
2692 struct got_entry
2693 {
2694 struct got_entry *next;
2695
2696 /* The symbol addend that we'll be placing in the GOT. */
2697 bfd_vma addend;
2698
2699 /* Unlike other ELF targets, we use separate GOT entries for the same
2700 symbol referenced from different input files. This is to support
2701 automatic multiple TOC/GOT sections, where the TOC base can vary
2702 from one input file to another. After partitioning into TOC groups
2703 we merge entries within the group.
2704
2705 Point to the BFD owning this GOT entry. */
2706 bfd *owner;
2707
2708 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2709 TLS_TPREL or TLS_DTPREL for tls entries. */
2710 unsigned char tls_type;
2711
2712 /* Non-zero if got.ent points to real entry. */
2713 unsigned char is_indirect;
2714
2715 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2716 union
2717 {
2718 bfd_signed_vma refcount;
2719 bfd_vma offset;
2720 struct got_entry *ent;
2721 } got;
2722 };
2723
2724 /* The same for PLT. */
2725 struct plt_entry
2726 {
2727 struct plt_entry *next;
2728
2729 bfd_vma addend;
2730
2731 union
2732 {
2733 bfd_signed_vma refcount;
2734 bfd_vma offset;
2735 } plt;
2736 };
2737
2738 struct ppc64_elf_obj_tdata
2739 {
2740 struct elf_obj_tdata elf;
2741
2742 /* Shortcuts to dynamic linker sections. */
2743 asection *got;
2744 asection *relgot;
2745
2746 /* Used during garbage collection. We attach global symbols defined
2747 on removed .opd entries to this section so that the sym is removed. */
2748 asection *deleted_section;
2749
2750 /* TLS local dynamic got entry handling. Support for multiple GOT
2751 sections means we potentially need one of these for each input bfd. */
2752 struct got_entry tlsld_got;
2753
2754 union {
2755 /* A copy of relocs before they are modified for --emit-relocs. */
2756 Elf_Internal_Rela *relocs;
2757
2758 /* Section contents. */
2759 bfd_byte *contents;
2760 } opd;
2761
2762 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2763 the reloc to be in the range -32768 to 32767. */
2764 unsigned int has_small_toc_reloc : 1;
2765
2766 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2767 instruction not one we handle. */
2768 unsigned int unexpected_toc_insn : 1;
2769 };
2770
2771 #define ppc64_elf_tdata(bfd) \
2772 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2773
2774 #define ppc64_tlsld_got(bfd) \
2775 (&ppc64_elf_tdata (bfd)->tlsld_got)
2776
2777 #define is_ppc64_elf(bfd) \
2778 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2779 && elf_object_id (bfd) == PPC64_ELF_DATA)
2780
2781 /* Override the generic function because we store some extras. */
2782
2783 static bfd_boolean
2784 ppc64_elf_mkobject (bfd *abfd)
2785 {
2786 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2787 PPC64_ELF_DATA);
2788 }
2789
2790 /* Fix bad default arch selected for a 64 bit input bfd when the
2791 default is 32 bit. */
2792
2793 static bfd_boolean
2794 ppc64_elf_object_p (bfd *abfd)
2795 {
2796 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2797 {
2798 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2799
2800 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2801 {
2802 /* Relies on arch after 32 bit default being 64 bit default. */
2803 abfd->arch_info = abfd->arch_info->next;
2804 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2805 }
2806 }
2807 return TRUE;
2808 }
2809
2810 /* Support for core dump NOTE sections. */
2811
2812 static bfd_boolean
2813 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2814 {
2815 size_t offset, size;
2816
2817 if (note->descsz != 504)
2818 return FALSE;
2819
2820 /* pr_cursig */
2821 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2822
2823 /* pr_pid */
2824 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2825
2826 /* pr_reg */
2827 offset = 112;
2828 size = 384;
2829
2830 /* Make a ".reg/999" section. */
2831 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2832 size, note->descpos + offset);
2833 }
2834
2835 static bfd_boolean
2836 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2837 {
2838 if (note->descsz != 136)
2839 return FALSE;
2840
2841 elf_tdata (abfd)->core->pid
2842 = bfd_get_32 (abfd, note->descdata + 24);
2843 elf_tdata (abfd)->core->program
2844 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2845 elf_tdata (abfd)->core->command
2846 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2847
2848 return TRUE;
2849 }
2850
2851 static char *
2852 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2853 ...)
2854 {
2855 switch (note_type)
2856 {
2857 default:
2858 return NULL;
2859
2860 case NT_PRPSINFO:
2861 {
2862 char data[136];
2863 va_list ap;
2864
2865 va_start (ap, note_type);
2866 memset (data, 0, sizeof (data));
2867 strncpy (data + 40, va_arg (ap, const char *), 16);
2868 strncpy (data + 56, va_arg (ap, const char *), 80);
2869 va_end (ap);
2870 return elfcore_write_note (abfd, buf, bufsiz,
2871 "CORE", note_type, data, sizeof (data));
2872 }
2873
2874 case NT_PRSTATUS:
2875 {
2876 char data[504];
2877 va_list ap;
2878 long pid;
2879 int cursig;
2880 const void *greg;
2881
2882 va_start (ap, note_type);
2883 memset (data, 0, 112);
2884 pid = va_arg (ap, long);
2885 bfd_put_32 (abfd, pid, data + 32);
2886 cursig = va_arg (ap, int);
2887 bfd_put_16 (abfd, cursig, data + 12);
2888 greg = va_arg (ap, const void *);
2889 memcpy (data + 112, greg, 384);
2890 memset (data + 496, 0, 8);
2891 va_end (ap);
2892 return elfcore_write_note (abfd, buf, bufsiz,
2893 "CORE", note_type, data, sizeof (data));
2894 }
2895 }
2896 }
2897
2898 /* Add extra PPC sections. */
2899
2900 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2901 {
2902 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2903 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2904 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2905 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2906 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2907 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2908 { NULL, 0, 0, 0, 0 }
2909 };
2910
2911 enum _ppc64_sec_type {
2912 sec_normal = 0,
2913 sec_opd = 1,
2914 sec_toc = 2
2915 };
2916
2917 struct _ppc64_elf_section_data
2918 {
2919 struct bfd_elf_section_data elf;
2920
2921 union
2922 {
2923 /* An array with one entry for each opd function descriptor. */
2924 struct _opd_sec_data
2925 {
2926 /* Points to the function code section for local opd entries. */
2927 asection **func_sec;
2928
2929 /* After editing .opd, adjust references to opd local syms. */
2930 long *adjust;
2931 } opd;
2932
2933 /* An array for toc sections, indexed by offset/8. */
2934 struct _toc_sec_data
2935 {
2936 /* Specifies the relocation symbol index used at a given toc offset. */
2937 unsigned *symndx;
2938
2939 /* And the relocation addend. */
2940 bfd_vma *add;
2941 } toc;
2942 } u;
2943
2944 enum _ppc64_sec_type sec_type:2;
2945
2946 /* Flag set when small branches are detected. Used to
2947 select suitable defaults for the stub group size. */
2948 unsigned int has_14bit_branch:1;
2949 };
2950
2951 #define ppc64_elf_section_data(sec) \
2952 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2953
2954 static bfd_boolean
2955 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2956 {
2957 if (!sec->used_by_bfd)
2958 {
2959 struct _ppc64_elf_section_data *sdata;
2960 bfd_size_type amt = sizeof (*sdata);
2961
2962 sdata = bfd_zalloc (abfd, amt);
2963 if (sdata == NULL)
2964 return FALSE;
2965 sec->used_by_bfd = sdata;
2966 }
2967
2968 return _bfd_elf_new_section_hook (abfd, sec);
2969 }
2970
2971 static struct _opd_sec_data *
2972 get_opd_info (asection * sec)
2973 {
2974 if (sec != NULL
2975 && ppc64_elf_section_data (sec) != NULL
2976 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2977 return &ppc64_elf_section_data (sec)->u.opd;
2978 return NULL;
2979 }
2980
2981 static inline int
2982 abiversion (bfd *abfd)
2983 {
2984 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
2985 }
2986
2987 static inline void
2988 set_abiversion (bfd *abfd, int ver)
2989 {
2990 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
2991 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
2992 }
2993 \f
2994 /* Parameters for the qsort hook. */
2995 static bfd_boolean synthetic_relocatable;
2996
2997 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2998
2999 static int
3000 compare_symbols (const void *ap, const void *bp)
3001 {
3002 const asymbol *a = * (const asymbol **) ap;
3003 const asymbol *b = * (const asymbol **) bp;
3004
3005 /* Section symbols first. */
3006 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3007 return -1;
3008 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3009 return 1;
3010
3011 /* then .opd symbols. */
3012 if (strcmp (a->section->name, ".opd") == 0
3013 && strcmp (b->section->name, ".opd") != 0)
3014 return -1;
3015 if (strcmp (a->section->name, ".opd") != 0
3016 && strcmp (b->section->name, ".opd") == 0)
3017 return 1;
3018
3019 /* then other code symbols. */
3020 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3021 == (SEC_CODE | SEC_ALLOC)
3022 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3023 != (SEC_CODE | SEC_ALLOC))
3024 return -1;
3025
3026 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3027 != (SEC_CODE | SEC_ALLOC)
3028 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3029 == (SEC_CODE | SEC_ALLOC))
3030 return 1;
3031
3032 if (synthetic_relocatable)
3033 {
3034 if (a->section->id < b->section->id)
3035 return -1;
3036
3037 if (a->section->id > b->section->id)
3038 return 1;
3039 }
3040
3041 if (a->value + a->section->vma < b->value + b->section->vma)
3042 return -1;
3043
3044 if (a->value + a->section->vma > b->value + b->section->vma)
3045 return 1;
3046
3047 /* For syms with the same value, prefer strong dynamic global function
3048 syms over other syms. */
3049 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3050 return -1;
3051
3052 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3053 return 1;
3054
3055 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3056 return -1;
3057
3058 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3059 return 1;
3060
3061 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3062 return -1;
3063
3064 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3065 return 1;
3066
3067 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3068 return -1;
3069
3070 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3071 return 1;
3072
3073 return 0;
3074 }
3075
3076 /* Search SYMS for a symbol of the given VALUE. */
3077
3078 static asymbol *
3079 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
3080 {
3081 long mid;
3082
3083 if (id == -1)
3084 {
3085 while (lo < hi)
3086 {
3087 mid = (lo + hi) >> 1;
3088 if (syms[mid]->value + syms[mid]->section->vma < value)
3089 lo = mid + 1;
3090 else if (syms[mid]->value + syms[mid]->section->vma > value)
3091 hi = mid;
3092 else
3093 return syms[mid];
3094 }
3095 }
3096 else
3097 {
3098 while (lo < hi)
3099 {
3100 mid = (lo + hi) >> 1;
3101 if (syms[mid]->section->id < id)
3102 lo = mid + 1;
3103 else if (syms[mid]->section->id > id)
3104 hi = mid;
3105 else if (syms[mid]->value < value)
3106 lo = mid + 1;
3107 else if (syms[mid]->value > value)
3108 hi = mid;
3109 else
3110 return syms[mid];
3111 }
3112 }
3113 return NULL;
3114 }
3115
3116 static bfd_boolean
3117 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3118 {
3119 bfd_vma vma = *(bfd_vma *) ptr;
3120 return ((section->flags & SEC_ALLOC) != 0
3121 && section->vma <= vma
3122 && vma < section->vma + section->size);
3123 }
3124
3125 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3126 entry syms. Also generate @plt symbols for the glink branch table. */
3127
3128 static long
3129 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3130 long static_count, asymbol **static_syms,
3131 long dyn_count, asymbol **dyn_syms,
3132 asymbol **ret)
3133 {
3134 asymbol *s;
3135 long i;
3136 long count;
3137 char *names;
3138 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3139 asection *opd = NULL;
3140 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3141 asymbol **syms;
3142 int abi = abiversion (abfd);
3143
3144 *ret = NULL;
3145
3146 if (abi < 2)
3147 {
3148 opd = bfd_get_section_by_name (abfd, ".opd");
3149 if (opd == NULL && abi == 1)
3150 return 0;
3151 }
3152
3153 symcount = static_count;
3154 if (!relocatable)
3155 symcount += dyn_count;
3156 if (symcount == 0)
3157 return 0;
3158
3159 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3160 if (syms == NULL)
3161 return -1;
3162
3163 if (!relocatable && static_count != 0 && dyn_count != 0)
3164 {
3165 /* Use both symbol tables. */
3166 memcpy (syms, static_syms, static_count * sizeof (*syms));
3167 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3168 }
3169 else if (!relocatable && static_count == 0)
3170 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3171 else
3172 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3173
3174 synthetic_relocatable = relocatable;
3175 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3176
3177 if (!relocatable && symcount > 1)
3178 {
3179 long j;
3180 /* Trim duplicate syms, since we may have merged the normal and
3181 dynamic symbols. Actually, we only care about syms that have
3182 different values, so trim any with the same value. */
3183 for (i = 1, j = 1; i < symcount; ++i)
3184 if (syms[i - 1]->value + syms[i - 1]->section->vma
3185 != syms[i]->value + syms[i]->section->vma)
3186 syms[j++] = syms[i];
3187 symcount = j;
3188 }
3189
3190 i = 0;
3191 if (strcmp (syms[i]->section->name, ".opd") == 0)
3192 ++i;
3193 codesecsym = i;
3194
3195 for (; i < symcount; ++i)
3196 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3197 != (SEC_CODE | SEC_ALLOC))
3198 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3199 break;
3200 codesecsymend = i;
3201
3202 for (; i < symcount; ++i)
3203 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3204 break;
3205 secsymend = i;
3206
3207 for (; i < symcount; ++i)
3208 if (strcmp (syms[i]->section->name, ".opd") != 0)
3209 break;
3210 opdsymend = i;
3211
3212 for (; i < symcount; ++i)
3213 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3214 != (SEC_CODE | SEC_ALLOC))
3215 break;
3216 symcount = i;
3217
3218 count = 0;
3219
3220 if (relocatable)
3221 {
3222 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3223 arelent *r;
3224 size_t size;
3225 long relcount;
3226
3227 if (opdsymend == secsymend)
3228 goto done;
3229
3230 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3231 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3232 if (relcount == 0)
3233 goto done;
3234
3235 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3236 {
3237 count = -1;
3238 goto done;
3239 }
3240
3241 size = 0;
3242 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3243 {
3244 asymbol *sym;
3245
3246 while (r < opd->relocation + relcount
3247 && r->address < syms[i]->value + opd->vma)
3248 ++r;
3249
3250 if (r == opd->relocation + relcount)
3251 break;
3252
3253 if (r->address != syms[i]->value + opd->vma)
3254 continue;
3255
3256 if (r->howto->type != R_PPC64_ADDR64)
3257 continue;
3258
3259 sym = *r->sym_ptr_ptr;
3260 if (!sym_exists_at (syms, opdsymend, symcount,
3261 sym->section->id, sym->value + r->addend))
3262 {
3263 ++count;
3264 size += sizeof (asymbol);
3265 size += strlen (syms[i]->name) + 2;
3266 }
3267 }
3268
3269 s = *ret = bfd_malloc (size);
3270 if (s == NULL)
3271 {
3272 count = -1;
3273 goto done;
3274 }
3275
3276 names = (char *) (s + count);
3277
3278 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3279 {
3280 asymbol *sym;
3281
3282 while (r < opd->relocation + relcount
3283 && r->address < syms[i]->value + opd->vma)
3284 ++r;
3285
3286 if (r == opd->relocation + relcount)
3287 break;
3288
3289 if (r->address != syms[i]->value + opd->vma)
3290 continue;
3291
3292 if (r->howto->type != R_PPC64_ADDR64)
3293 continue;
3294
3295 sym = *r->sym_ptr_ptr;
3296 if (!sym_exists_at (syms, opdsymend, symcount,
3297 sym->section->id, sym->value + r->addend))
3298 {
3299 size_t len;
3300
3301 *s = *syms[i];
3302 s->flags |= BSF_SYNTHETIC;
3303 s->section = sym->section;
3304 s->value = sym->value + r->addend;
3305 s->name = names;
3306 *names++ = '.';
3307 len = strlen (syms[i]->name);
3308 memcpy (names, syms[i]->name, len + 1);
3309 names += len + 1;
3310 /* Have udata.p point back to the original symbol this
3311 synthetic symbol was derived from. */
3312 s->udata.p = syms[i];
3313 s++;
3314 }
3315 }
3316 }
3317 else
3318 {
3319 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3320 bfd_byte *contents = NULL;
3321 size_t size;
3322 long plt_count = 0;
3323 bfd_vma glink_vma = 0, resolv_vma = 0;
3324 asection *dynamic, *glink = NULL, *relplt = NULL;
3325 arelent *p;
3326
3327 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3328 {
3329 free_contents_and_exit:
3330 if (contents)
3331 free (contents);
3332 count = -1;
3333 goto done;
3334 }
3335
3336 size = 0;
3337 for (i = secsymend; i < opdsymend; ++i)
3338 {
3339 bfd_vma ent;
3340
3341 /* Ignore bogus symbols. */
3342 if (syms[i]->value > opd->size - 8)
3343 continue;
3344
3345 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3346 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3347 {
3348 ++count;
3349 size += sizeof (asymbol);
3350 size += strlen (syms[i]->name) + 2;
3351 }
3352 }
3353
3354 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3355 if (dyn_count != 0
3356 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3357 {
3358 bfd_byte *dynbuf, *extdyn, *extdynend;
3359 size_t extdynsize;
3360 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3361
3362 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3363 goto free_contents_and_exit;
3364
3365 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3366 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3367
3368 extdyn = dynbuf;
3369 extdynend = extdyn + dynamic->size;
3370 for (; extdyn < extdynend; extdyn += extdynsize)
3371 {
3372 Elf_Internal_Dyn dyn;
3373 (*swap_dyn_in) (abfd, extdyn, &dyn);
3374
3375 if (dyn.d_tag == DT_NULL)
3376 break;
3377
3378 if (dyn.d_tag == DT_PPC64_GLINK)
3379 {
3380 /* The first glink stub starts at offset 32; see
3381 comment in ppc64_elf_finish_dynamic_sections. */
3382 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3383 /* The .glink section usually does not survive the final
3384 link; search for the section (usually .text) where the
3385 glink stubs now reside. */
3386 glink = bfd_sections_find_if (abfd, section_covers_vma,
3387 &glink_vma);
3388 break;
3389 }
3390 }
3391
3392 free (dynbuf);
3393 }
3394
3395 if (glink != NULL)
3396 {
3397 /* Determine __glink trampoline by reading the relative branch
3398 from the first glink stub. */
3399 bfd_byte buf[4];
3400 unsigned int off = 0;
3401
3402 while (bfd_get_section_contents (abfd, glink, buf,
3403 glink_vma + off - glink->vma, 4))
3404 {
3405 unsigned int insn = bfd_get_32 (abfd, buf);
3406 insn ^= B_DOT;
3407 if ((insn & ~0x3fffffc) == 0)
3408 {
3409 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3410 break;
3411 }
3412 off += 4;
3413 if (off > 4)
3414 break;
3415 }
3416
3417 if (resolv_vma)
3418 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3419
3420 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3421 if (relplt != NULL)
3422 {
3423 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3424 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3425 goto free_contents_and_exit;
3426
3427 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3428 size += plt_count * sizeof (asymbol);
3429
3430 p = relplt->relocation;
3431 for (i = 0; i < plt_count; i++, p++)
3432 {
3433 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3434 if (p->addend != 0)
3435 size += sizeof ("+0x") - 1 + 16;
3436 }
3437 }
3438 }
3439
3440 s = *ret = bfd_malloc (size);
3441 if (s == NULL)
3442 goto free_contents_and_exit;
3443
3444 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3445
3446 for (i = secsymend; i < opdsymend; ++i)
3447 {
3448 bfd_vma ent;
3449
3450 if (syms[i]->value > opd->size - 8)
3451 continue;
3452
3453 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3454 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3455 {
3456 long lo, hi;
3457 size_t len;
3458 asection *sec = abfd->sections;
3459
3460 *s = *syms[i];
3461 lo = codesecsym;
3462 hi = codesecsymend;
3463 while (lo < hi)
3464 {
3465 long mid = (lo + hi) >> 1;
3466 if (syms[mid]->section->vma < ent)
3467 lo = mid + 1;
3468 else if (syms[mid]->section->vma > ent)
3469 hi = mid;
3470 else
3471 {
3472 sec = syms[mid]->section;
3473 break;
3474 }
3475 }
3476
3477 if (lo >= hi && lo > codesecsym)
3478 sec = syms[lo - 1]->section;
3479
3480 for (; sec != NULL; sec = sec->next)
3481 {
3482 if (sec->vma > ent)
3483 break;
3484 /* SEC_LOAD may not be set if SEC is from a separate debug
3485 info file. */
3486 if ((sec->flags & SEC_ALLOC) == 0)
3487 break;
3488 if ((sec->flags & SEC_CODE) != 0)
3489 s->section = sec;
3490 }
3491 s->flags |= BSF_SYNTHETIC;
3492 s->value = ent - s->section->vma;
3493 s->name = names;
3494 *names++ = '.';
3495 len = strlen (syms[i]->name);
3496 memcpy (names, syms[i]->name, len + 1);
3497 names += len + 1;
3498 /* Have udata.p point back to the original symbol this
3499 synthetic symbol was derived from. */
3500 s->udata.p = syms[i];
3501 s++;
3502 }
3503 }
3504 free (contents);
3505
3506 if (glink != NULL && relplt != NULL)
3507 {
3508 if (resolv_vma)
3509 {
3510 /* Add a symbol for the main glink trampoline. */
3511 memset (s, 0, sizeof *s);
3512 s->the_bfd = abfd;
3513 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3514 s->section = glink;
3515 s->value = resolv_vma - glink->vma;
3516 s->name = names;
3517 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3518 names += sizeof ("__glink_PLTresolve");
3519 s++;
3520 count++;
3521 }
3522
3523 /* FIXME: It would be very much nicer to put sym@plt on the
3524 stub rather than on the glink branch table entry. The
3525 objdump disassembler would then use a sensible symbol
3526 name on plt calls. The difficulty in doing so is
3527 a) finding the stubs, and,
3528 b) matching stubs against plt entries, and,
3529 c) there can be multiple stubs for a given plt entry.
3530
3531 Solving (a) could be done by code scanning, but older
3532 ppc64 binaries used different stubs to current code.
3533 (b) is the tricky one since you need to known the toc
3534 pointer for at least one function that uses a pic stub to
3535 be able to calculate the plt address referenced.
3536 (c) means gdb would need to set multiple breakpoints (or
3537 find the glink branch itself) when setting breakpoints
3538 for pending shared library loads. */
3539 p = relplt->relocation;
3540 for (i = 0; i < plt_count; i++, p++)
3541 {
3542 size_t len;
3543
3544 *s = **p->sym_ptr_ptr;
3545 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3546 we are defining a symbol, ensure one of them is set. */
3547 if ((s->flags & BSF_LOCAL) == 0)
3548 s->flags |= BSF_GLOBAL;
3549 s->flags |= BSF_SYNTHETIC;
3550 s->section = glink;
3551 s->value = glink_vma - glink->vma;
3552 s->name = names;
3553 s->udata.p = NULL;
3554 len = strlen ((*p->sym_ptr_ptr)->name);
3555 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3556 names += len;
3557 if (p->addend != 0)
3558 {
3559 memcpy (names, "+0x", sizeof ("+0x") - 1);
3560 names += sizeof ("+0x") - 1;
3561 bfd_sprintf_vma (abfd, names, p->addend);
3562 names += strlen (names);
3563 }
3564 memcpy (names, "@plt", sizeof ("@plt"));
3565 names += sizeof ("@plt");
3566 s++;
3567 if (abi < 2)
3568 {
3569 glink_vma += 8;
3570 if (i >= 0x8000)
3571 glink_vma += 4;
3572 }
3573 else
3574 glink_vma += 4;
3575 }
3576 count += plt_count;
3577 }
3578 }
3579
3580 done:
3581 free (syms);
3582 return count;
3583 }
3584 \f
3585 /* The following functions are specific to the ELF linker, while
3586 functions above are used generally. Those named ppc64_elf_* are
3587 called by the main ELF linker code. They appear in this file more
3588 or less in the order in which they are called. eg.
3589 ppc64_elf_check_relocs is called early in the link process,
3590 ppc64_elf_finish_dynamic_sections is one of the last functions
3591 called.
3592
3593 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3594 functions have both a function code symbol and a function descriptor
3595 symbol. A call to foo in a relocatable object file looks like:
3596
3597 . .text
3598 . x:
3599 . bl .foo
3600 . nop
3601
3602 The function definition in another object file might be:
3603
3604 . .section .opd
3605 . foo: .quad .foo
3606 . .quad .TOC.@tocbase
3607 . .quad 0
3608 .
3609 . .text
3610 . .foo: blr
3611
3612 When the linker resolves the call during a static link, the branch
3613 unsurprisingly just goes to .foo and the .opd information is unused.
3614 If the function definition is in a shared library, things are a little
3615 different: The call goes via a plt call stub, the opd information gets
3616 copied to the plt, and the linker patches the nop.
3617
3618 . x:
3619 . bl .foo_stub
3620 . ld 2,40(1)
3621 .
3622 .
3623 . .foo_stub:
3624 . std 2,40(1) # in practice, the call stub
3625 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3626 . addi 11,11,Lfoo@toc@l # this is the general idea
3627 . ld 12,0(11)
3628 . ld 2,8(11)
3629 . mtctr 12
3630 . ld 11,16(11)
3631 . bctr
3632 .
3633 . .section .plt
3634 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3635
3636 The "reloc ()" notation is supposed to indicate that the linker emits
3637 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3638 copying.
3639
3640 What are the difficulties here? Well, firstly, the relocations
3641 examined by the linker in check_relocs are against the function code
3642 sym .foo, while the dynamic relocation in the plt is emitted against
3643 the function descriptor symbol, foo. Somewhere along the line, we need
3644 to carefully copy dynamic link information from one symbol to the other.
3645 Secondly, the generic part of the elf linker will make .foo a dynamic
3646 symbol as is normal for most other backends. We need foo dynamic
3647 instead, at least for an application final link. However, when
3648 creating a shared library containing foo, we need to have both symbols
3649 dynamic so that references to .foo are satisfied during the early
3650 stages of linking. Otherwise the linker might decide to pull in a
3651 definition from some other object, eg. a static library.
3652
3653 Update: As of August 2004, we support a new convention. Function
3654 calls may use the function descriptor symbol, ie. "bl foo". This
3655 behaves exactly as "bl .foo". */
3656
3657 /* Of those relocs that might be copied as dynamic relocs, this function
3658 selects those that must be copied when linking a shared library,
3659 even when the symbol is local. */
3660
3661 static int
3662 must_be_dyn_reloc (struct bfd_link_info *info,
3663 enum elf_ppc64_reloc_type r_type)
3664 {
3665 switch (r_type)
3666 {
3667 default:
3668 return 1;
3669
3670 case R_PPC64_REL32:
3671 case R_PPC64_REL64:
3672 case R_PPC64_REL30:
3673 return 0;
3674
3675 case R_PPC64_TPREL16:
3676 case R_PPC64_TPREL16_LO:
3677 case R_PPC64_TPREL16_HI:
3678 case R_PPC64_TPREL16_HA:
3679 case R_PPC64_TPREL16_DS:
3680 case R_PPC64_TPREL16_LO_DS:
3681 case R_PPC64_TPREL16_HIGH:
3682 case R_PPC64_TPREL16_HIGHA:
3683 case R_PPC64_TPREL16_HIGHER:
3684 case R_PPC64_TPREL16_HIGHERA:
3685 case R_PPC64_TPREL16_HIGHEST:
3686 case R_PPC64_TPREL16_HIGHESTA:
3687 case R_PPC64_TPREL64:
3688 return !info->executable;
3689 }
3690 }
3691
3692 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3693 copying dynamic variables from a shared lib into an app's dynbss
3694 section, and instead use a dynamic relocation to point into the
3695 shared lib. With code that gcc generates, it's vital that this be
3696 enabled; In the PowerPC64 ABI, the address of a function is actually
3697 the address of a function descriptor, which resides in the .opd
3698 section. gcc uses the descriptor directly rather than going via the
3699 GOT as some other ABI's do, which means that initialized function
3700 pointers must reference the descriptor. Thus, a function pointer
3701 initialized to the address of a function in a shared library will
3702 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3703 redefines the function descriptor symbol to point to the copy. This
3704 presents a problem as a plt entry for that function is also
3705 initialized from the function descriptor symbol and the copy reloc
3706 may not be initialized first. */
3707 #define ELIMINATE_COPY_RELOCS 1
3708
3709 /* Section name for stubs is the associated section name plus this
3710 string. */
3711 #define STUB_SUFFIX ".stub"
3712
3713 /* Linker stubs.
3714 ppc_stub_long_branch:
3715 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3716 destination, but a 24 bit branch in a stub section will reach.
3717 . b dest
3718
3719 ppc_stub_plt_branch:
3720 Similar to the above, but a 24 bit branch in the stub section won't
3721 reach its destination.
3722 . addis %r11,%r2,xxx@toc@ha
3723 . ld %r12,xxx@toc@l(%r11)
3724 . mtctr %r12
3725 . bctr
3726
3727 ppc_stub_plt_call:
3728 Used to call a function in a shared library. If it so happens that
3729 the plt entry referenced crosses a 64k boundary, then an extra
3730 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3731 . std %r2,40(%r1)
3732 . addis %r11,%r2,xxx@toc@ha
3733 . ld %r12,xxx+0@toc@l(%r11)
3734 . mtctr %r12
3735 . ld %r2,xxx+8@toc@l(%r11)
3736 . ld %r11,xxx+16@toc@l(%r11)
3737 . bctr
3738
3739 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3740 code to adjust the value and save r2 to support multiple toc sections.
3741 A ppc_stub_long_branch with an r2 offset looks like:
3742 . std %r2,40(%r1)
3743 . addis %r2,%r2,off@ha
3744 . addi %r2,%r2,off@l
3745 . b dest
3746
3747 A ppc_stub_plt_branch with an r2 offset looks like:
3748 . std %r2,40(%r1)
3749 . addis %r11,%r2,xxx@toc@ha
3750 . ld %r12,xxx@toc@l(%r11)
3751 . addis %r2,%r2,off@ha
3752 . addi %r2,%r2,off@l
3753 . mtctr %r12
3754 . bctr
3755
3756 In cases where the "addis" instruction would add zero, the "addis" is
3757 omitted and following instructions modified slightly in some cases.
3758 */
3759
3760 enum ppc_stub_type {
3761 ppc_stub_none,
3762 ppc_stub_long_branch,
3763 ppc_stub_long_branch_r2off,
3764 ppc_stub_plt_branch,
3765 ppc_stub_plt_branch_r2off,
3766 ppc_stub_plt_call,
3767 ppc_stub_plt_call_r2save
3768 };
3769
3770 struct ppc_stub_hash_entry {
3771
3772 /* Base hash table entry structure. */
3773 struct bfd_hash_entry root;
3774
3775 enum ppc_stub_type stub_type;
3776
3777 /* The stub section. */
3778 asection *stub_sec;
3779
3780 /* Offset within stub_sec of the beginning of this stub. */
3781 bfd_vma stub_offset;
3782
3783 /* Given the symbol's value and its section we can determine its final
3784 value when building the stubs (so the stub knows where to jump. */
3785 bfd_vma target_value;
3786 asection *target_section;
3787
3788 /* The symbol table entry, if any, that this was derived from. */
3789 struct ppc_link_hash_entry *h;
3790 struct plt_entry *plt_ent;
3791
3792 /* Where this stub is being called from, or, in the case of combined
3793 stub sections, the first input section in the group. */
3794 asection *id_sec;
3795
3796 /* Symbol st_other. */
3797 unsigned char other;
3798 };
3799
3800 struct ppc_branch_hash_entry {
3801
3802 /* Base hash table entry structure. */
3803 struct bfd_hash_entry root;
3804
3805 /* Offset within branch lookup table. */
3806 unsigned int offset;
3807
3808 /* Generation marker. */
3809 unsigned int iter;
3810 };
3811
3812 /* Used to track dynamic relocations for local symbols. */
3813 struct ppc_dyn_relocs
3814 {
3815 struct ppc_dyn_relocs *next;
3816
3817 /* The input section of the reloc. */
3818 asection *sec;
3819
3820 /* Total number of relocs copied for the input section. */
3821 unsigned int count : 31;
3822
3823 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3824 unsigned int ifunc : 1;
3825 };
3826
3827 struct ppc_link_hash_entry
3828 {
3829 struct elf_link_hash_entry elf;
3830
3831 union {
3832 /* A pointer to the most recently used stub hash entry against this
3833 symbol. */
3834 struct ppc_stub_hash_entry *stub_cache;
3835
3836 /* A pointer to the next symbol starting with a '.' */
3837 struct ppc_link_hash_entry *next_dot_sym;
3838 } u;
3839
3840 /* Track dynamic relocs copied for this symbol. */
3841 struct elf_dyn_relocs *dyn_relocs;
3842
3843 /* Link between function code and descriptor symbols. */
3844 struct ppc_link_hash_entry *oh;
3845
3846 /* Flag function code and descriptor symbols. */
3847 unsigned int is_func:1;
3848 unsigned int is_func_descriptor:1;
3849 unsigned int fake:1;
3850
3851 /* Whether global opd/toc sym has been adjusted or not.
3852 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3853 should be set for all globals defined in any opd/toc section. */
3854 unsigned int adjust_done:1;
3855
3856 /* Set if we twiddled this symbol to weak at some stage. */
3857 unsigned int was_undefined:1;
3858
3859 /* Contexts in which symbol is used in the GOT (or TOC).
3860 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3861 corresponding relocs are encountered during check_relocs.
3862 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3863 indicate the corresponding GOT entry type is not needed.
3864 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3865 a TPREL one. We use a separate flag rather than setting TPREL
3866 just for convenience in distinguishing the two cases. */
3867 #define TLS_GD 1 /* GD reloc. */
3868 #define TLS_LD 2 /* LD reloc. */
3869 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3870 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3871 #define TLS_TLS 16 /* Any TLS reloc. */
3872 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3873 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3874 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3875 unsigned char tls_mask;
3876 };
3877
3878 /* ppc64 ELF linker hash table. */
3879
3880 struct ppc_link_hash_table
3881 {
3882 struct elf_link_hash_table elf;
3883
3884 /* The stub hash table. */
3885 struct bfd_hash_table stub_hash_table;
3886
3887 /* Another hash table for plt_branch stubs. */
3888 struct bfd_hash_table branch_hash_table;
3889
3890 /* Hash table for function prologue tocsave. */
3891 htab_t tocsave_htab;
3892
3893 /* Various options and other info passed from the linker. */
3894 struct ppc64_elf_params *params;
3895
3896 /* Array to keep track of which stub sections have been created, and
3897 information on stub grouping. */
3898 struct map_stub {
3899 /* This is the section to which stubs in the group will be attached. */
3900 asection *link_sec;
3901 /* The stub section. */
3902 asection *stub_sec;
3903 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3904 bfd_vma toc_off;
3905 } *stub_group;
3906
3907 /* Temp used when calculating TOC pointers. */
3908 bfd_vma toc_curr;
3909 bfd *toc_bfd;
3910 asection *toc_first_sec;
3911
3912 /* Highest input section id. */
3913 int top_id;
3914
3915 /* Highest output section index. */
3916 int top_index;
3917
3918 /* Used when adding symbols. */
3919 struct ppc_link_hash_entry *dot_syms;
3920
3921 /* List of input sections for each output section. */
3922 asection **input_list;
3923
3924 /* Shortcuts to get to dynamic linker sections. */
3925 asection *dynbss;
3926 asection *relbss;
3927 asection *glink;
3928 asection *sfpr;
3929 asection *brlt;
3930 asection *relbrlt;
3931 asection *glink_eh_frame;
3932
3933 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3934 struct ppc_link_hash_entry *tls_get_addr;
3935 struct ppc_link_hash_entry *tls_get_addr_fd;
3936
3937 /* The size of reliplt used by got entry relocs. */
3938 bfd_size_type got_reli_size;
3939
3940 /* Statistics. */
3941 unsigned long stub_count[ppc_stub_plt_call_r2save];
3942
3943 /* Number of stubs against global syms. */
3944 unsigned long stub_globals;
3945
3946 /* Set if we're linking code with function descriptors. */
3947 unsigned int opd_abi:1;
3948
3949 /* Support for multiple toc sections. */
3950 unsigned int do_multi_toc:1;
3951 unsigned int multi_toc_needed:1;
3952 unsigned int second_toc_pass:1;
3953 unsigned int do_toc_opt:1;
3954
3955 /* Set on error. */
3956 unsigned int stub_error:1;
3957
3958 /* Temp used by ppc64_elf_process_dot_syms. */
3959 unsigned int twiddled_syms:1;
3960
3961 /* Incremented every time we size stubs. */
3962 unsigned int stub_iteration;
3963
3964 /* Small local sym cache. */
3965 struct sym_cache sym_cache;
3966 };
3967
3968 /* Rename some of the generic section flags to better document how they
3969 are used here. */
3970
3971 /* Nonzero if this section has TLS related relocations. */
3972 #define has_tls_reloc sec_flg0
3973
3974 /* Nonzero if this section has a call to __tls_get_addr. */
3975 #define has_tls_get_addr_call sec_flg1
3976
3977 /* Nonzero if this section has any toc or got relocs. */
3978 #define has_toc_reloc sec_flg2
3979
3980 /* Nonzero if this section has a call to another section that uses
3981 the toc or got. */
3982 #define makes_toc_func_call sec_flg3
3983
3984 /* Recursion protection when determining above flag. */
3985 #define call_check_in_progress sec_flg4
3986 #define call_check_done sec_flg5
3987
3988 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3989
3990 #define ppc_hash_table(p) \
3991 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3992 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3993
3994 #define ppc_stub_hash_lookup(table, string, create, copy) \
3995 ((struct ppc_stub_hash_entry *) \
3996 bfd_hash_lookup ((table), (string), (create), (copy)))
3997
3998 #define ppc_branch_hash_lookup(table, string, create, copy) \
3999 ((struct ppc_branch_hash_entry *) \
4000 bfd_hash_lookup ((table), (string), (create), (copy)))
4001
4002 /* Create an entry in the stub hash table. */
4003
4004 static struct bfd_hash_entry *
4005 stub_hash_newfunc (struct bfd_hash_entry *entry,
4006 struct bfd_hash_table *table,
4007 const char *string)
4008 {
4009 /* Allocate the structure if it has not already been allocated by a
4010 subclass. */
4011 if (entry == NULL)
4012 {
4013 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4014 if (entry == NULL)
4015 return entry;
4016 }
4017
4018 /* Call the allocation method of the superclass. */
4019 entry = bfd_hash_newfunc (entry, table, string);
4020 if (entry != NULL)
4021 {
4022 struct ppc_stub_hash_entry *eh;
4023
4024 /* Initialize the local fields. */
4025 eh = (struct ppc_stub_hash_entry *) entry;
4026 eh->stub_type = ppc_stub_none;
4027 eh->stub_sec = NULL;
4028 eh->stub_offset = 0;
4029 eh->target_value = 0;
4030 eh->target_section = NULL;
4031 eh->h = NULL;
4032 eh->plt_ent = NULL;
4033 eh->id_sec = NULL;
4034 eh->other = 0;
4035 }
4036
4037 return entry;
4038 }
4039
4040 /* Create an entry in the branch hash table. */
4041
4042 static struct bfd_hash_entry *
4043 branch_hash_newfunc (struct bfd_hash_entry *entry,
4044 struct bfd_hash_table *table,
4045 const char *string)
4046 {
4047 /* Allocate the structure if it has not already been allocated by a
4048 subclass. */
4049 if (entry == NULL)
4050 {
4051 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4052 if (entry == NULL)
4053 return entry;
4054 }
4055
4056 /* Call the allocation method of the superclass. */
4057 entry = bfd_hash_newfunc (entry, table, string);
4058 if (entry != NULL)
4059 {
4060 struct ppc_branch_hash_entry *eh;
4061
4062 /* Initialize the local fields. */
4063 eh = (struct ppc_branch_hash_entry *) entry;
4064 eh->offset = 0;
4065 eh->iter = 0;
4066 }
4067
4068 return entry;
4069 }
4070
4071 /* Create an entry in a ppc64 ELF linker hash table. */
4072
4073 static struct bfd_hash_entry *
4074 link_hash_newfunc (struct bfd_hash_entry *entry,
4075 struct bfd_hash_table *table,
4076 const char *string)
4077 {
4078 /* Allocate the structure if it has not already been allocated by a
4079 subclass. */
4080 if (entry == NULL)
4081 {
4082 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4083 if (entry == NULL)
4084 return entry;
4085 }
4086
4087 /* Call the allocation method of the superclass. */
4088 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4089 if (entry != NULL)
4090 {
4091 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4092
4093 memset (&eh->u.stub_cache, 0,
4094 (sizeof (struct ppc_link_hash_entry)
4095 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4096
4097 /* When making function calls, old ABI code references function entry
4098 points (dot symbols), while new ABI code references the function
4099 descriptor symbol. We need to make any combination of reference and
4100 definition work together, without breaking archive linking.
4101
4102 For a defined function "foo" and an undefined call to "bar":
4103 An old object defines "foo" and ".foo", references ".bar" (possibly
4104 "bar" too).
4105 A new object defines "foo" and references "bar".
4106
4107 A new object thus has no problem with its undefined symbols being
4108 satisfied by definitions in an old object. On the other hand, the
4109 old object won't have ".bar" satisfied by a new object.
4110
4111 Keep a list of newly added dot-symbols. */
4112
4113 if (string[0] == '.')
4114 {
4115 struct ppc_link_hash_table *htab;
4116
4117 htab = (struct ppc_link_hash_table *) table;
4118 eh->u.next_dot_sym = htab->dot_syms;
4119 htab->dot_syms = eh;
4120 }
4121 }
4122
4123 return entry;
4124 }
4125
4126 struct tocsave_entry {
4127 asection *sec;
4128 bfd_vma offset;
4129 };
4130
4131 static hashval_t
4132 tocsave_htab_hash (const void *p)
4133 {
4134 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4135 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4136 }
4137
4138 static int
4139 tocsave_htab_eq (const void *p1, const void *p2)
4140 {
4141 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4142 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4143 return e1->sec == e2->sec && e1->offset == e2->offset;
4144 }
4145
4146 /* Create a ppc64 ELF linker hash table. */
4147
4148 static struct bfd_link_hash_table *
4149 ppc64_elf_link_hash_table_create (bfd *abfd)
4150 {
4151 struct ppc_link_hash_table *htab;
4152 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4153
4154 htab = bfd_zmalloc (amt);
4155 if (htab == NULL)
4156 return NULL;
4157
4158 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4159 sizeof (struct ppc_link_hash_entry),
4160 PPC64_ELF_DATA))
4161 {
4162 free (htab);
4163 return NULL;
4164 }
4165
4166 /* Init the stub hash table too. */
4167 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4168 sizeof (struct ppc_stub_hash_entry)))
4169 {
4170 _bfd_elf_link_hash_table_free ((struct bfd_link_hash_table *) htab);
4171 return NULL;
4172 }
4173
4174 /* And the branch hash table. */
4175 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4176 sizeof (struct ppc_branch_hash_entry)))
4177 {
4178 bfd_hash_table_free (&htab->stub_hash_table);
4179 _bfd_elf_link_hash_table_free ((struct bfd_link_hash_table *) htab);
4180 return NULL;
4181 }
4182
4183 htab->tocsave_htab = htab_try_create (1024,
4184 tocsave_htab_hash,
4185 tocsave_htab_eq,
4186 NULL);
4187 if (htab->tocsave_htab == NULL)
4188 {
4189 bfd_hash_table_free (&htab->branch_hash_table);
4190 bfd_hash_table_free (&htab->stub_hash_table);
4191 _bfd_elf_link_hash_table_free ((struct bfd_link_hash_table *) htab);
4192 return NULL;
4193 }
4194
4195 /* Initializing two fields of the union is just cosmetic. We really
4196 only care about glist, but when compiled on a 32-bit host the
4197 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4198 debugger inspection of these fields look nicer. */
4199 htab->elf.init_got_refcount.refcount = 0;
4200 htab->elf.init_got_refcount.glist = NULL;
4201 htab->elf.init_plt_refcount.refcount = 0;
4202 htab->elf.init_plt_refcount.glist = NULL;
4203 htab->elf.init_got_offset.offset = 0;
4204 htab->elf.init_got_offset.glist = NULL;
4205 htab->elf.init_plt_offset.offset = 0;
4206 htab->elf.init_plt_offset.glist = NULL;
4207
4208 return &htab->elf.root;
4209 }
4210
4211 /* Free the derived linker hash table. */
4212
4213 static void
4214 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4215 {
4216 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4217
4218 bfd_hash_table_free (&htab->stub_hash_table);
4219 bfd_hash_table_free (&htab->branch_hash_table);
4220 if (htab->tocsave_htab)
4221 htab_delete (htab->tocsave_htab);
4222 _bfd_elf_link_hash_table_free (hash);
4223 }
4224
4225 /* Create sections for linker generated code. */
4226
4227 static bfd_boolean
4228 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4229 {
4230 struct ppc_link_hash_table *htab;
4231 flagword flags;
4232
4233 htab = ppc_hash_table (info);
4234
4235 /* Create .sfpr for code to save and restore fp regs. */
4236 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4237 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4238 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4239 flags);
4240 if (htab->sfpr == NULL
4241 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4242 return FALSE;
4243
4244 /* Create .glink for lazy dynamic linking support. */
4245 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4246 flags);
4247 if (htab->glink == NULL
4248 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4249 return FALSE;
4250
4251 if (!info->no_ld_generated_unwind_info)
4252 {
4253 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4254 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4255 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4256 ".eh_frame",
4257 flags);
4258 if (htab->glink_eh_frame == NULL
4259 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4260 return FALSE;
4261 }
4262
4263 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4264 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4265 if (htab->elf.iplt == NULL
4266 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4267 return FALSE;
4268
4269 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4270 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4271 htab->elf.irelplt
4272 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4273 if (htab->elf.irelplt == NULL
4274 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4275 return FALSE;
4276
4277 /* Create branch lookup table for plt_branch stubs. */
4278 flags = (SEC_ALLOC | SEC_LOAD
4279 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4280 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4281 flags);
4282 if (htab->brlt == NULL
4283 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4284 return FALSE;
4285
4286 if (!info->shared)
4287 return TRUE;
4288
4289 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4290 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4291 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4292 ".rela.branch_lt",
4293 flags);
4294 if (htab->relbrlt == NULL
4295 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4296 return FALSE;
4297
4298 return TRUE;
4299 }
4300
4301 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4302
4303 bfd_boolean
4304 ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4305 struct ppc64_elf_params *params)
4306 {
4307 struct ppc_link_hash_table *htab;
4308
4309 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4310
4311 /* Always hook our dynamic sections into the first bfd, which is the
4312 linker created stub bfd. This ensures that the GOT header is at
4313 the start of the output TOC section. */
4314 htab = ppc_hash_table (info);
4315 if (htab == NULL)
4316 return FALSE;
4317 htab->elf.dynobj = params->stub_bfd;
4318 htab->params = params;
4319
4320 if (info->relocatable)
4321 return TRUE;
4322
4323 return create_linkage_sections (htab->elf.dynobj, info);
4324 }
4325
4326 /* Build a name for an entry in the stub hash table. */
4327
4328 static char *
4329 ppc_stub_name (const asection *input_section,
4330 const asection *sym_sec,
4331 const struct ppc_link_hash_entry *h,
4332 const Elf_Internal_Rela *rel)
4333 {
4334 char *stub_name;
4335 ssize_t len;
4336
4337 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4338 offsets from a sym as a branch target? In fact, we could
4339 probably assume the addend is always zero. */
4340 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4341
4342 if (h)
4343 {
4344 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4345 stub_name = bfd_malloc (len);
4346 if (stub_name == NULL)
4347 return stub_name;
4348
4349 len = sprintf (stub_name, "%08x.%s+%x",
4350 input_section->id & 0xffffffff,
4351 h->elf.root.root.string,
4352 (int) rel->r_addend & 0xffffffff);
4353 }
4354 else
4355 {
4356 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4357 stub_name = bfd_malloc (len);
4358 if (stub_name == NULL)
4359 return stub_name;
4360
4361 len = sprintf (stub_name, "%08x.%x:%x+%x",
4362 input_section->id & 0xffffffff,
4363 sym_sec->id & 0xffffffff,
4364 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4365 (int) rel->r_addend & 0xffffffff);
4366 }
4367 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4368 stub_name[len - 2] = 0;
4369 return stub_name;
4370 }
4371
4372 /* Look up an entry in the stub hash. Stub entries are cached because
4373 creating the stub name takes a bit of time. */
4374
4375 static struct ppc_stub_hash_entry *
4376 ppc_get_stub_entry (const asection *input_section,
4377 const asection *sym_sec,
4378 struct ppc_link_hash_entry *h,
4379 const Elf_Internal_Rela *rel,
4380 struct ppc_link_hash_table *htab)
4381 {
4382 struct ppc_stub_hash_entry *stub_entry;
4383 const asection *id_sec;
4384
4385 /* If this input section is part of a group of sections sharing one
4386 stub section, then use the id of the first section in the group.
4387 Stub names need to include a section id, as there may well be
4388 more than one stub used to reach say, printf, and we need to
4389 distinguish between them. */
4390 id_sec = htab->stub_group[input_section->id].link_sec;
4391
4392 if (h != NULL && h->u.stub_cache != NULL
4393 && h->u.stub_cache->h == h
4394 && h->u.stub_cache->id_sec == id_sec)
4395 {
4396 stub_entry = h->u.stub_cache;
4397 }
4398 else
4399 {
4400 char *stub_name;
4401
4402 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4403 if (stub_name == NULL)
4404 return NULL;
4405
4406 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4407 stub_name, FALSE, FALSE);
4408 if (h != NULL)
4409 h->u.stub_cache = stub_entry;
4410
4411 free (stub_name);
4412 }
4413
4414 return stub_entry;
4415 }
4416
4417 /* Add a new stub entry to the stub hash. Not all fields of the new
4418 stub entry are initialised. */
4419
4420 static struct ppc_stub_hash_entry *
4421 ppc_add_stub (const char *stub_name,
4422 asection *section,
4423 struct bfd_link_info *info)
4424 {
4425 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4426 asection *link_sec;
4427 asection *stub_sec;
4428 struct ppc_stub_hash_entry *stub_entry;
4429
4430 link_sec = htab->stub_group[section->id].link_sec;
4431 stub_sec = htab->stub_group[section->id].stub_sec;
4432 if (stub_sec == NULL)
4433 {
4434 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4435 if (stub_sec == NULL)
4436 {
4437 size_t namelen;
4438 bfd_size_type len;
4439 char *s_name;
4440
4441 namelen = strlen (link_sec->name);
4442 len = namelen + sizeof (STUB_SUFFIX);
4443 s_name = bfd_alloc (htab->params->stub_bfd, len);
4444 if (s_name == NULL)
4445 return NULL;
4446
4447 memcpy (s_name, link_sec->name, namelen);
4448 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4449 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4450 if (stub_sec == NULL)
4451 return NULL;
4452 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4453 }
4454 htab->stub_group[section->id].stub_sec = stub_sec;
4455 }
4456
4457 /* Enter this entry into the linker stub hash table. */
4458 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4459 TRUE, FALSE);
4460 if (stub_entry == NULL)
4461 {
4462 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4463 section->owner, stub_name);
4464 return NULL;
4465 }
4466
4467 stub_entry->stub_sec = stub_sec;
4468 stub_entry->stub_offset = 0;
4469 stub_entry->id_sec = link_sec;
4470 return stub_entry;
4471 }
4472
4473 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4474 not already done. */
4475
4476 static bfd_boolean
4477 create_got_section (bfd *abfd, struct bfd_link_info *info)
4478 {
4479 asection *got, *relgot;
4480 flagword flags;
4481 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4482
4483 if (!is_ppc64_elf (abfd))
4484 return FALSE;
4485 if (htab == NULL)
4486 return FALSE;
4487
4488 if (!htab->elf.sgot
4489 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4490 return FALSE;
4491
4492 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4493 | SEC_LINKER_CREATED);
4494
4495 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4496 if (!got
4497 || !bfd_set_section_alignment (abfd, got, 3))
4498 return FALSE;
4499
4500 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4501 flags | SEC_READONLY);
4502 if (!relgot
4503 || ! bfd_set_section_alignment (abfd, relgot, 3))
4504 return FALSE;
4505
4506 ppc64_elf_tdata (abfd)->got = got;
4507 ppc64_elf_tdata (abfd)->relgot = relgot;
4508 return TRUE;
4509 }
4510
4511 /* Create the dynamic sections, and set up shortcuts. */
4512
4513 static bfd_boolean
4514 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4515 {
4516 struct ppc_link_hash_table *htab;
4517
4518 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4519 return FALSE;
4520
4521 htab = ppc_hash_table (info);
4522 if (htab == NULL)
4523 return FALSE;
4524
4525 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4526 if (!info->shared)
4527 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4528
4529 if (!htab->elf.sgot || !htab->elf.splt || !htab->elf.srelplt || !htab->dynbss
4530 || (!info->shared && !htab->relbss))
4531 abort ();
4532
4533 return TRUE;
4534 }
4535
4536 /* Follow indirect and warning symbol links. */
4537
4538 static inline struct bfd_link_hash_entry *
4539 follow_link (struct bfd_link_hash_entry *h)
4540 {
4541 while (h->type == bfd_link_hash_indirect
4542 || h->type == bfd_link_hash_warning)
4543 h = h->u.i.link;
4544 return h;
4545 }
4546
4547 static inline struct elf_link_hash_entry *
4548 elf_follow_link (struct elf_link_hash_entry *h)
4549 {
4550 return (struct elf_link_hash_entry *) follow_link (&h->root);
4551 }
4552
4553 static inline struct ppc_link_hash_entry *
4554 ppc_follow_link (struct ppc_link_hash_entry *h)
4555 {
4556 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4557 }
4558
4559 /* Merge PLT info on FROM with that on TO. */
4560
4561 static void
4562 move_plt_plist (struct ppc_link_hash_entry *from,
4563 struct ppc_link_hash_entry *to)
4564 {
4565 if (from->elf.plt.plist != NULL)
4566 {
4567 if (to->elf.plt.plist != NULL)
4568 {
4569 struct plt_entry **entp;
4570 struct plt_entry *ent;
4571
4572 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4573 {
4574 struct plt_entry *dent;
4575
4576 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4577 if (dent->addend == ent->addend)
4578 {
4579 dent->plt.refcount += ent->plt.refcount;
4580 *entp = ent->next;
4581 break;
4582 }
4583 if (dent == NULL)
4584 entp = &ent->next;
4585 }
4586 *entp = to->elf.plt.plist;
4587 }
4588
4589 to->elf.plt.plist = from->elf.plt.plist;
4590 from->elf.plt.plist = NULL;
4591 }
4592 }
4593
4594 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4595
4596 static void
4597 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4598 struct elf_link_hash_entry *dir,
4599 struct elf_link_hash_entry *ind)
4600 {
4601 struct ppc_link_hash_entry *edir, *eind;
4602
4603 edir = (struct ppc_link_hash_entry *) dir;
4604 eind = (struct ppc_link_hash_entry *) ind;
4605
4606 edir->is_func |= eind->is_func;
4607 edir->is_func_descriptor |= eind->is_func_descriptor;
4608 edir->tls_mask |= eind->tls_mask;
4609 if (eind->oh != NULL)
4610 edir->oh = ppc_follow_link (eind->oh);
4611
4612 /* If called to transfer flags for a weakdef during processing
4613 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4614 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4615 if (!(ELIMINATE_COPY_RELOCS
4616 && eind->elf.root.type != bfd_link_hash_indirect
4617 && edir->elf.dynamic_adjusted))
4618 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4619
4620 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4621 edir->elf.ref_regular |= eind->elf.ref_regular;
4622 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4623 edir->elf.needs_plt |= eind->elf.needs_plt;
4624 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4625
4626 /* Copy over any dynamic relocs we may have on the indirect sym. */
4627 if (eind->dyn_relocs != NULL)
4628 {
4629 if (edir->dyn_relocs != NULL)
4630 {
4631 struct elf_dyn_relocs **pp;
4632 struct elf_dyn_relocs *p;
4633
4634 /* Add reloc counts against the indirect sym to the direct sym
4635 list. Merge any entries against the same section. */
4636 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4637 {
4638 struct elf_dyn_relocs *q;
4639
4640 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4641 if (q->sec == p->sec)
4642 {
4643 q->pc_count += p->pc_count;
4644 q->count += p->count;
4645 *pp = p->next;
4646 break;
4647 }
4648 if (q == NULL)
4649 pp = &p->next;
4650 }
4651 *pp = edir->dyn_relocs;
4652 }
4653
4654 edir->dyn_relocs = eind->dyn_relocs;
4655 eind->dyn_relocs = NULL;
4656 }
4657
4658 /* If we were called to copy over info for a weak sym, that's all.
4659 You might think dyn_relocs need not be copied over; After all,
4660 both syms will be dynamic or both non-dynamic so we're just
4661 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4662 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4663 dyn_relocs in read-only sections, and it does so on what is the
4664 DIR sym here. */
4665 if (eind->elf.root.type != bfd_link_hash_indirect)
4666 return;
4667
4668 /* Copy over got entries that we may have already seen to the
4669 symbol which just became indirect. */
4670 if (eind->elf.got.glist != NULL)
4671 {
4672 if (edir->elf.got.glist != NULL)
4673 {
4674 struct got_entry **entp;
4675 struct got_entry *ent;
4676
4677 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4678 {
4679 struct got_entry *dent;
4680
4681 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4682 if (dent->addend == ent->addend
4683 && dent->owner == ent->owner
4684 && dent->tls_type == ent->tls_type)
4685 {
4686 dent->got.refcount += ent->got.refcount;
4687 *entp = ent->next;
4688 break;
4689 }
4690 if (dent == NULL)
4691 entp = &ent->next;
4692 }
4693 *entp = edir->elf.got.glist;
4694 }
4695
4696 edir->elf.got.glist = eind->elf.got.glist;
4697 eind->elf.got.glist = NULL;
4698 }
4699
4700 /* And plt entries. */
4701 move_plt_plist (eind, edir);
4702
4703 if (eind->elf.dynindx != -1)
4704 {
4705 if (edir->elf.dynindx != -1)
4706 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4707 edir->elf.dynstr_index);
4708 edir->elf.dynindx = eind->elf.dynindx;
4709 edir->elf.dynstr_index = eind->elf.dynstr_index;
4710 eind->elf.dynindx = -1;
4711 eind->elf.dynstr_index = 0;
4712 }
4713 }
4714
4715 /* Find the function descriptor hash entry from the given function code
4716 hash entry FH. Link the entries via their OH fields. */
4717
4718 static struct ppc_link_hash_entry *
4719 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4720 {
4721 struct ppc_link_hash_entry *fdh = fh->oh;
4722
4723 if (fdh == NULL)
4724 {
4725 const char *fd_name = fh->elf.root.root.string + 1;
4726
4727 fdh = (struct ppc_link_hash_entry *)
4728 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4729 if (fdh == NULL)
4730 return fdh;
4731
4732 fdh->is_func_descriptor = 1;
4733 fdh->oh = fh;
4734 fh->is_func = 1;
4735 fh->oh = fdh;
4736 }
4737
4738 return ppc_follow_link (fdh);
4739 }
4740
4741 /* Make a fake function descriptor sym for the code sym FH. */
4742
4743 static struct ppc_link_hash_entry *
4744 make_fdh (struct bfd_link_info *info,
4745 struct ppc_link_hash_entry *fh)
4746 {
4747 bfd *abfd;
4748 asymbol *newsym;
4749 struct bfd_link_hash_entry *bh;
4750 struct ppc_link_hash_entry *fdh;
4751
4752 abfd = fh->elf.root.u.undef.abfd;
4753 newsym = bfd_make_empty_symbol (abfd);
4754 newsym->name = fh->elf.root.root.string + 1;
4755 newsym->section = bfd_und_section_ptr;
4756 newsym->value = 0;
4757 newsym->flags = BSF_WEAK;
4758
4759 bh = NULL;
4760 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4761 newsym->flags, newsym->section,
4762 newsym->value, NULL, FALSE, FALSE,
4763 &bh))
4764 return NULL;
4765
4766 fdh = (struct ppc_link_hash_entry *) bh;
4767 fdh->elf.non_elf = 0;
4768 fdh->fake = 1;
4769 fdh->is_func_descriptor = 1;
4770 fdh->oh = fh;
4771 fh->is_func = 1;
4772 fh->oh = fdh;
4773 return fdh;
4774 }
4775
4776 /* Fix function descriptor symbols defined in .opd sections to be
4777 function type. */
4778
4779 static bfd_boolean
4780 ppc64_elf_add_symbol_hook (bfd *ibfd,
4781 struct bfd_link_info *info,
4782 Elf_Internal_Sym *isym,
4783 const char **name,
4784 flagword *flags ATTRIBUTE_UNUSED,
4785 asection **sec,
4786 bfd_vma *value ATTRIBUTE_UNUSED)
4787 {
4788 if ((ibfd->flags & DYNAMIC) == 0
4789 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4790 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4791
4792 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4793 {
4794 if ((ibfd->flags & DYNAMIC) == 0)
4795 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4796 }
4797 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4798 ;
4799 else if (*sec != NULL
4800 && strcmp ((*sec)->name, ".opd") == 0)
4801 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4802
4803 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4804 {
4805 if (abiversion (ibfd) == 0)
4806 set_abiversion (ibfd, 2);
4807 else if (abiversion (ibfd) == 1)
4808 {
4809 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4810 " for ABI version 1\n"), name);
4811 bfd_set_error (bfd_error_bad_value);
4812 return FALSE;
4813 }
4814 }
4815
4816 return TRUE;
4817 }
4818
4819 /* Merge non-visibility st_other attributes: local entry point. */
4820
4821 static void
4822 ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4823 const Elf_Internal_Sym *isym,
4824 bfd_boolean definition,
4825 bfd_boolean dynamic)
4826 {
4827 if (definition && !dynamic)
4828 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4829 | ELF_ST_VISIBILITY (h->other));
4830 }
4831
4832 /* This function makes an old ABI object reference to ".bar" cause the
4833 inclusion of a new ABI object archive that defines "bar".
4834 NAME is a symbol defined in an archive. Return a symbol in the hash
4835 table that might be satisfied by the archive symbols. */
4836
4837 static struct elf_link_hash_entry *
4838 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4839 struct bfd_link_info *info,
4840 const char *name)
4841 {
4842 struct elf_link_hash_entry *h;
4843 char *dot_name;
4844 size_t len;
4845
4846 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4847 if (h != NULL
4848 /* Don't return this sym if it is a fake function descriptor
4849 created by add_symbol_adjust. */
4850 && !(h->root.type == bfd_link_hash_undefweak
4851 && ((struct ppc_link_hash_entry *) h)->fake))
4852 return h;
4853
4854 if (name[0] == '.')
4855 return h;
4856
4857 len = strlen (name);
4858 dot_name = bfd_alloc (abfd, len + 2);
4859 if (dot_name == NULL)
4860 return (struct elf_link_hash_entry *) 0 - 1;
4861 dot_name[0] = '.';
4862 memcpy (dot_name + 1, name, len + 1);
4863 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4864 bfd_release (abfd, dot_name);
4865 return h;
4866 }
4867
4868 /* This function satisfies all old ABI object references to ".bar" if a
4869 new ABI object defines "bar". Well, at least, undefined dot symbols
4870 are made weak. This stops later archive searches from including an
4871 object if we already have a function descriptor definition. It also
4872 prevents the linker complaining about undefined symbols.
4873 We also check and correct mismatched symbol visibility here. The
4874 most restrictive visibility of the function descriptor and the
4875 function entry symbol is used. */
4876
4877 static bfd_boolean
4878 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4879 {
4880 struct ppc_link_hash_table *htab;
4881 struct ppc_link_hash_entry *fdh;
4882
4883 if (eh->elf.root.type == bfd_link_hash_indirect)
4884 return TRUE;
4885
4886 if (eh->elf.root.type == bfd_link_hash_warning)
4887 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4888
4889 if (eh->elf.root.root.string[0] != '.')
4890 abort ();
4891
4892 htab = ppc_hash_table (info);
4893 if (htab == NULL)
4894 return FALSE;
4895
4896 fdh = lookup_fdh (eh, htab);
4897 if (fdh == NULL)
4898 {
4899 if (!info->relocatable
4900 && (eh->elf.root.type == bfd_link_hash_undefined
4901 || eh->elf.root.type == bfd_link_hash_undefweak)
4902 && eh->elf.ref_regular)
4903 {
4904 /* Make an undefweak function descriptor sym, which is enough to
4905 pull in an --as-needed shared lib, but won't cause link
4906 errors. Archives are handled elsewhere. */
4907 fdh = make_fdh (info, eh);
4908 if (fdh == NULL)
4909 return FALSE;
4910 fdh->elf.ref_regular = 1;
4911 }
4912 }
4913 else
4914 {
4915 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4916 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4917 if (entry_vis < descr_vis)
4918 fdh->elf.other += entry_vis - descr_vis;
4919 else if (entry_vis > descr_vis)
4920 eh->elf.other += descr_vis - entry_vis;
4921
4922 if ((fdh->elf.root.type == bfd_link_hash_defined
4923 || fdh->elf.root.type == bfd_link_hash_defweak)
4924 && eh->elf.root.type == bfd_link_hash_undefined)
4925 {
4926 eh->elf.root.type = bfd_link_hash_undefweak;
4927 eh->was_undefined = 1;
4928 htab->twiddled_syms = 1;
4929 }
4930 }
4931
4932 return TRUE;
4933 }
4934
4935 /* Process list of dot-symbols we made in link_hash_newfunc. */
4936
4937 static bfd_boolean
4938 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4939 {
4940 struct ppc_link_hash_table *htab;
4941 struct ppc_link_hash_entry **p, *eh;
4942
4943 if (!is_ppc64_elf (info->output_bfd))
4944 return TRUE;
4945 htab = ppc_hash_table (info);
4946 if (htab == NULL)
4947 return FALSE;
4948
4949 if (is_ppc64_elf (ibfd))
4950 {
4951 p = &htab->dot_syms;
4952 while ((eh = *p) != NULL)
4953 {
4954 *p = NULL;
4955 if (&eh->elf == htab->elf.hgot)
4956 ;
4957 else if (htab->elf.hgot == NULL
4958 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
4959 htab->elf.hgot = &eh->elf;
4960 else if (!add_symbol_adjust (eh, info))
4961 return FALSE;
4962 p = &eh->u.next_dot_sym;
4963 }
4964 }
4965
4966 /* Clear the list for non-ppc64 input files. */
4967 p = &htab->dot_syms;
4968 while ((eh = *p) != NULL)
4969 {
4970 *p = NULL;
4971 p = &eh->u.next_dot_sym;
4972 }
4973
4974 /* We need to fix the undefs list for any syms we have twiddled to
4975 undef_weak. */
4976 if (htab->twiddled_syms)
4977 {
4978 bfd_link_repair_undef_list (&htab->elf.root);
4979 htab->twiddled_syms = 0;
4980 }
4981 return TRUE;
4982 }
4983
4984 /* Undo hash table changes when an --as-needed input file is determined
4985 not to be needed. */
4986
4987 static bfd_boolean
4988 ppc64_elf_notice_as_needed (bfd *ibfd,
4989 struct bfd_link_info *info,
4990 enum notice_asneeded_action act)
4991 {
4992 if (act == notice_not_needed)
4993 {
4994 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4995
4996 if (htab == NULL)
4997 return FALSE;
4998
4999 htab->dot_syms = NULL;
5000 }
5001 return _bfd_elf_notice_as_needed (ibfd, info, act);
5002 }
5003
5004 /* If --just-symbols against a final linked binary, then assume we need
5005 toc adjusting stubs when calling functions defined there. */
5006
5007 static void
5008 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5009 {
5010 if ((sec->flags & SEC_CODE) != 0
5011 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5012 && is_ppc64_elf (sec->owner))
5013 {
5014 if (abiversion (sec->owner) >= 2
5015 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5016 sec->has_toc_reloc = 1;
5017 }
5018 _bfd_elf_link_just_syms (sec, info);
5019 }
5020
5021 static struct plt_entry **
5022 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5023 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5024 {
5025 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5026 struct plt_entry **local_plt;
5027 unsigned char *local_got_tls_masks;
5028
5029 if (local_got_ents == NULL)
5030 {
5031 bfd_size_type size = symtab_hdr->sh_info;
5032
5033 size *= (sizeof (*local_got_ents)
5034 + sizeof (*local_plt)
5035 + sizeof (*local_got_tls_masks));
5036 local_got_ents = bfd_zalloc (abfd, size);
5037 if (local_got_ents == NULL)
5038 return NULL;
5039 elf_local_got_ents (abfd) = local_got_ents;
5040 }
5041
5042 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5043 {
5044 struct got_entry *ent;
5045
5046 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5047 if (ent->addend == r_addend
5048 && ent->owner == abfd
5049 && ent->tls_type == tls_type)
5050 break;
5051 if (ent == NULL)
5052 {
5053 bfd_size_type amt = sizeof (*ent);
5054 ent = bfd_alloc (abfd, amt);
5055 if (ent == NULL)
5056 return FALSE;
5057 ent->next = local_got_ents[r_symndx];
5058 ent->addend = r_addend;
5059 ent->owner = abfd;
5060 ent->tls_type = tls_type;
5061 ent->is_indirect = FALSE;
5062 ent->got.refcount = 0;
5063 local_got_ents[r_symndx] = ent;
5064 }
5065 ent->got.refcount += 1;
5066 }
5067
5068 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5069 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5070 local_got_tls_masks[r_symndx] |= tls_type;
5071
5072 return local_plt + r_symndx;
5073 }
5074
5075 static bfd_boolean
5076 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5077 {
5078 struct plt_entry *ent;
5079
5080 for (ent = *plist; ent != NULL; ent = ent->next)
5081 if (ent->addend == addend)
5082 break;
5083 if (ent == NULL)
5084 {
5085 bfd_size_type amt = sizeof (*ent);
5086 ent = bfd_alloc (abfd, amt);
5087 if (ent == NULL)
5088 return FALSE;
5089 ent->next = *plist;
5090 ent->addend = addend;
5091 ent->plt.refcount = 0;
5092 *plist = ent;
5093 }
5094 ent->plt.refcount += 1;
5095 return TRUE;
5096 }
5097
5098 static bfd_boolean
5099 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5100 {
5101 return (r_type == R_PPC64_REL24
5102 || r_type == R_PPC64_REL14
5103 || r_type == R_PPC64_REL14_BRTAKEN
5104 || r_type == R_PPC64_REL14_BRNTAKEN
5105 || r_type == R_PPC64_ADDR24
5106 || r_type == R_PPC64_ADDR14
5107 || r_type == R_PPC64_ADDR14_BRTAKEN
5108 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5109 }
5110
5111 /* Look through the relocs for a section during the first phase, and
5112 calculate needed space in the global offset table, procedure
5113 linkage table, and dynamic reloc sections. */
5114
5115 static bfd_boolean
5116 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5117 asection *sec, const Elf_Internal_Rela *relocs)
5118 {
5119 struct ppc_link_hash_table *htab;
5120 Elf_Internal_Shdr *symtab_hdr;
5121 struct elf_link_hash_entry **sym_hashes;
5122 const Elf_Internal_Rela *rel;
5123 const Elf_Internal_Rela *rel_end;
5124 asection *sreloc;
5125 asection **opd_sym_map;
5126 struct elf_link_hash_entry *tga, *dottga;
5127
5128 if (info->relocatable)
5129 return TRUE;
5130
5131 /* Don't do anything special with non-loaded, non-alloced sections.
5132 In particular, any relocs in such sections should not affect GOT
5133 and PLT reference counting (ie. we don't allow them to create GOT
5134 or PLT entries), there's no possibility or desire to optimize TLS
5135 relocs, and there's not much point in propagating relocs to shared
5136 libs that the dynamic linker won't relocate. */
5137 if ((sec->flags & SEC_ALLOC) == 0)
5138 return TRUE;
5139
5140 BFD_ASSERT (is_ppc64_elf (abfd));
5141
5142 htab = ppc_hash_table (info);
5143 if (htab == NULL)
5144 return FALSE;
5145
5146 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5147 FALSE, FALSE, TRUE);
5148 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5149 FALSE, FALSE, TRUE);
5150 symtab_hdr = &elf_symtab_hdr (abfd);
5151 sym_hashes = elf_sym_hashes (abfd);
5152 sreloc = NULL;
5153 opd_sym_map = NULL;
5154 if (strcmp (sec->name, ".opd") == 0)
5155 {
5156 /* Garbage collection needs some extra help with .opd sections.
5157 We don't want to necessarily keep everything referenced by
5158 relocs in .opd, as that would keep all functions. Instead,
5159 if we reference an .opd symbol (a function descriptor), we
5160 want to keep the function code symbol's section. This is
5161 easy for global symbols, but for local syms we need to keep
5162 information about the associated function section. */
5163 bfd_size_type amt;
5164
5165 if (abiversion (abfd) == 0)
5166 set_abiversion (abfd, 1);
5167 else if (abiversion (abfd) == 2)
5168 {
5169 info->callbacks->einfo (_("%P: .opd not allowed in ABI version %d\n"),
5170 abiversion (abfd));
5171 bfd_set_error (bfd_error_bad_value);
5172 return FALSE;
5173 }
5174 amt = sec->size * sizeof (*opd_sym_map) / 8;
5175 opd_sym_map = bfd_zalloc (abfd, amt);
5176 if (opd_sym_map == NULL)
5177 return FALSE;
5178 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
5179 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
5180 ppc64_elf_section_data (sec)->sec_type = sec_opd;
5181 }
5182
5183 rel_end = relocs + sec->reloc_count;
5184 for (rel = relocs; rel < rel_end; rel++)
5185 {
5186 unsigned long r_symndx;
5187 struct elf_link_hash_entry *h;
5188 enum elf_ppc64_reloc_type r_type;
5189 int tls_type;
5190 struct _ppc64_elf_section_data *ppc64_sec;
5191 struct plt_entry **ifunc;
5192
5193 r_symndx = ELF64_R_SYM (rel->r_info);
5194 if (r_symndx < symtab_hdr->sh_info)
5195 h = NULL;
5196 else
5197 {
5198 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5199 h = elf_follow_link (h);
5200
5201 /* PR15323, ref flags aren't set for references in the same
5202 object. */
5203 h->root.non_ir_ref = 1;
5204
5205 if (h == htab->elf.hgot)
5206 sec->has_toc_reloc = 1;
5207 }
5208
5209 tls_type = 0;
5210 ifunc = NULL;
5211 if (h != NULL)
5212 {
5213 if (h->type == STT_GNU_IFUNC)
5214 {
5215 h->needs_plt = 1;
5216 ifunc = &h->plt.plist;
5217 }
5218 }
5219 else
5220 {
5221 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5222 abfd, r_symndx);
5223 if (isym == NULL)
5224 return FALSE;
5225
5226 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5227 {
5228 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5229 rel->r_addend, PLT_IFUNC);
5230 if (ifunc == NULL)
5231 return FALSE;
5232 }
5233 }
5234 r_type = ELF64_R_TYPE (rel->r_info);
5235 if (is_branch_reloc (r_type))
5236 {
5237 if (h != NULL && (h == tga || h == dottga))
5238 {
5239 if (rel != relocs
5240 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5241 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5242 /* We have a new-style __tls_get_addr call with a marker
5243 reloc. */
5244 ;
5245 else
5246 /* Mark this section as having an old-style call. */
5247 sec->has_tls_get_addr_call = 1;
5248 }
5249
5250 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5251 if (ifunc != NULL
5252 && !update_plt_info (abfd, ifunc, rel->r_addend))
5253 return FALSE;
5254 }
5255
5256 switch (r_type)
5257 {
5258 case R_PPC64_TLSGD:
5259 case R_PPC64_TLSLD:
5260 /* These special tls relocs tie a call to __tls_get_addr with
5261 its parameter symbol. */
5262 break;
5263
5264 case R_PPC64_GOT_TLSLD16:
5265 case R_PPC64_GOT_TLSLD16_LO:
5266 case R_PPC64_GOT_TLSLD16_HI:
5267 case R_PPC64_GOT_TLSLD16_HA:
5268 tls_type = TLS_TLS | TLS_LD;
5269 goto dogottls;
5270
5271 case R_PPC64_GOT_TLSGD16:
5272 case R_PPC64_GOT_TLSGD16_LO:
5273 case R_PPC64_GOT_TLSGD16_HI:
5274 case R_PPC64_GOT_TLSGD16_HA:
5275 tls_type = TLS_TLS | TLS_GD;
5276 goto dogottls;
5277
5278 case R_PPC64_GOT_TPREL16_DS:
5279 case R_PPC64_GOT_TPREL16_LO_DS:
5280 case R_PPC64_GOT_TPREL16_HI:
5281 case R_PPC64_GOT_TPREL16_HA:
5282 if (!info->executable)
5283 info->flags |= DF_STATIC_TLS;
5284 tls_type = TLS_TLS | TLS_TPREL;
5285 goto dogottls;
5286
5287 case R_PPC64_GOT_DTPREL16_DS:
5288 case R_PPC64_GOT_DTPREL16_LO_DS:
5289 case R_PPC64_GOT_DTPREL16_HI:
5290 case R_PPC64_GOT_DTPREL16_HA:
5291 tls_type = TLS_TLS | TLS_DTPREL;
5292 dogottls:
5293 sec->has_tls_reloc = 1;
5294 /* Fall thru */
5295
5296 case R_PPC64_GOT16:
5297 case R_PPC64_GOT16_DS:
5298 case R_PPC64_GOT16_HA:
5299 case R_PPC64_GOT16_HI:
5300 case R_PPC64_GOT16_LO:
5301 case R_PPC64_GOT16_LO_DS:
5302 /* This symbol requires a global offset table entry. */
5303 sec->has_toc_reloc = 1;
5304 if (r_type == R_PPC64_GOT_TLSLD16
5305 || r_type == R_PPC64_GOT_TLSGD16
5306 || r_type == R_PPC64_GOT_TPREL16_DS
5307 || r_type == R_PPC64_GOT_DTPREL16_DS
5308 || r_type == R_PPC64_GOT16
5309 || r_type == R_PPC64_GOT16_DS)
5310 {
5311 htab->do_multi_toc = 1;
5312 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5313 }
5314
5315 if (ppc64_elf_tdata (abfd)->got == NULL
5316 && !create_got_section (abfd, info))
5317 return FALSE;
5318
5319 if (h != NULL)
5320 {
5321 struct ppc_link_hash_entry *eh;
5322 struct got_entry *ent;
5323
5324 eh = (struct ppc_link_hash_entry *) h;
5325 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5326 if (ent->addend == rel->r_addend
5327 && ent->owner == abfd
5328 && ent->tls_type == tls_type)
5329 break;
5330 if (ent == NULL)
5331 {
5332 bfd_size_type amt = sizeof (*ent);
5333 ent = bfd_alloc (abfd, amt);
5334 if (ent == NULL)
5335 return FALSE;
5336 ent->next = eh->elf.got.glist;
5337 ent->addend = rel->r_addend;
5338 ent->owner = abfd;
5339 ent->tls_type = tls_type;
5340 ent->is_indirect = FALSE;
5341 ent->got.refcount = 0;
5342 eh->elf.got.glist = ent;
5343 }
5344 ent->got.refcount += 1;
5345 eh->tls_mask |= tls_type;
5346 }
5347 else
5348 /* This is a global offset table entry for a local symbol. */
5349 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5350 rel->r_addend, tls_type))
5351 return FALSE;
5352
5353 /* We may also need a plt entry if the symbol turns out to be
5354 an ifunc. */
5355 if (h != NULL && !info->shared && abiversion (abfd) == 2)
5356 {
5357 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5358 return FALSE;
5359 }
5360 break;
5361
5362 case R_PPC64_PLT16_HA:
5363 case R_PPC64_PLT16_HI:
5364 case R_PPC64_PLT16_LO:
5365 case R_PPC64_PLT32:
5366 case R_PPC64_PLT64:
5367 /* This symbol requires a procedure linkage table entry. We
5368 actually build the entry in adjust_dynamic_symbol,
5369 because this might be a case of linking PIC code without
5370 linking in any dynamic objects, in which case we don't
5371 need to generate a procedure linkage table after all. */
5372 if (h == NULL)
5373 {
5374 /* It does not make sense to have a procedure linkage
5375 table entry for a local symbol. */
5376 bfd_set_error (bfd_error_bad_value);
5377 return FALSE;
5378 }
5379 else
5380 {
5381 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5382 return FALSE;
5383 h->needs_plt = 1;
5384 if (h->root.root.string[0] == '.'
5385 && h->root.root.string[1] != '\0')
5386 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5387 }
5388 break;
5389
5390 /* The following relocations don't need to propagate the
5391 relocation if linking a shared object since they are
5392 section relative. */
5393 case R_PPC64_SECTOFF:
5394 case R_PPC64_SECTOFF_LO:
5395 case R_PPC64_SECTOFF_HI:
5396 case R_PPC64_SECTOFF_HA:
5397 case R_PPC64_SECTOFF_DS:
5398 case R_PPC64_SECTOFF_LO_DS:
5399 case R_PPC64_DTPREL16:
5400 case R_PPC64_DTPREL16_LO:
5401 case R_PPC64_DTPREL16_HI:
5402 case R_PPC64_DTPREL16_HA:
5403 case R_PPC64_DTPREL16_DS:
5404 case R_PPC64_DTPREL16_LO_DS:
5405 case R_PPC64_DTPREL16_HIGH:
5406 case R_PPC64_DTPREL16_HIGHA:
5407 case R_PPC64_DTPREL16_HIGHER:
5408 case R_PPC64_DTPREL16_HIGHERA:
5409 case R_PPC64_DTPREL16_HIGHEST:
5410 case R_PPC64_DTPREL16_HIGHESTA:
5411 break;
5412
5413 /* Nor do these. */
5414 case R_PPC64_REL16:
5415 case R_PPC64_REL16_LO:
5416 case R_PPC64_REL16_HI:
5417 case R_PPC64_REL16_HA:
5418 break;
5419
5420 /* Not supported as a dynamic relocation. */
5421 case R_PPC64_ADDR64_LOCAL:
5422 if (info->shared)
5423 {
5424 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5425 ppc_howto_init ();
5426 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5427 "in shared libraries and PIEs.\n"),
5428 abfd, sec, rel->r_offset,
5429 ppc64_elf_howto_table[r_type]->name);
5430 bfd_set_error (bfd_error_bad_value);
5431 return FALSE;
5432 }
5433 break;
5434
5435 case R_PPC64_TOC16:
5436 case R_PPC64_TOC16_DS:
5437 htab->do_multi_toc = 1;
5438 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5439 case R_PPC64_TOC16_LO:
5440 case R_PPC64_TOC16_HI:
5441 case R_PPC64_TOC16_HA:
5442 case R_PPC64_TOC16_LO_DS:
5443 sec->has_toc_reloc = 1;
5444 break;
5445
5446 /* This relocation describes the C++ object vtable hierarchy.
5447 Reconstruct it for later use during GC. */
5448 case R_PPC64_GNU_VTINHERIT:
5449 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5450 return FALSE;
5451 break;
5452
5453 /* This relocation describes which C++ vtable entries are actually
5454 used. Record for later use during GC. */
5455 case R_PPC64_GNU_VTENTRY:
5456 BFD_ASSERT (h != NULL);
5457 if (h != NULL
5458 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5459 return FALSE;
5460 break;
5461
5462 case R_PPC64_REL14:
5463 case R_PPC64_REL14_BRTAKEN:
5464 case R_PPC64_REL14_BRNTAKEN:
5465 {
5466 asection *dest = NULL;
5467
5468 /* Heuristic: If jumping outside our section, chances are
5469 we are going to need a stub. */
5470 if (h != NULL)
5471 {
5472 /* If the sym is weak it may be overridden later, so
5473 don't assume we know where a weak sym lives. */
5474 if (h->root.type == bfd_link_hash_defined)
5475 dest = h->root.u.def.section;
5476 }
5477 else
5478 {
5479 Elf_Internal_Sym *isym;
5480
5481 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5482 abfd, r_symndx);
5483 if (isym == NULL)
5484 return FALSE;
5485
5486 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5487 }
5488
5489 if (dest != sec)
5490 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5491 }
5492 /* Fall through. */
5493
5494 case R_PPC64_REL24:
5495 if (h != NULL && ifunc == NULL)
5496 {
5497 /* We may need a .plt entry if the function this reloc
5498 refers to is in a shared lib. */
5499 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5500 return FALSE;
5501 h->needs_plt = 1;
5502 if (h->root.root.string[0] == '.'
5503 && h->root.root.string[1] != '\0')
5504 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5505 if (h == tga || h == dottga)
5506 sec->has_tls_reloc = 1;
5507 }
5508 break;
5509
5510 case R_PPC64_TPREL64:
5511 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5512 if (!info->executable)
5513 info->flags |= DF_STATIC_TLS;
5514 goto dotlstoc;
5515
5516 case R_PPC64_DTPMOD64:
5517 if (rel + 1 < rel_end
5518 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5519 && rel[1].r_offset == rel->r_offset + 8)
5520 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5521 else
5522 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5523 goto dotlstoc;
5524
5525 case R_PPC64_DTPREL64:
5526 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5527 if (rel != relocs
5528 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5529 && rel[-1].r_offset == rel->r_offset - 8)
5530 /* This is the second reloc of a dtpmod, dtprel pair.
5531 Don't mark with TLS_DTPREL. */
5532 goto dodyn;
5533
5534 dotlstoc:
5535 sec->has_tls_reloc = 1;
5536 if (h != NULL)
5537 {
5538 struct ppc_link_hash_entry *eh;
5539 eh = (struct ppc_link_hash_entry *) h;
5540 eh->tls_mask |= tls_type;
5541 }
5542 else
5543 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5544 rel->r_addend, tls_type))
5545 return FALSE;
5546
5547 ppc64_sec = ppc64_elf_section_data (sec);
5548 if (ppc64_sec->sec_type != sec_toc)
5549 {
5550 bfd_size_type amt;
5551
5552 /* One extra to simplify get_tls_mask. */
5553 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5554 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5555 if (ppc64_sec->u.toc.symndx == NULL)
5556 return FALSE;
5557 amt = sec->size * sizeof (bfd_vma) / 8;
5558 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5559 if (ppc64_sec->u.toc.add == NULL)
5560 return FALSE;
5561 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5562 ppc64_sec->sec_type = sec_toc;
5563 }
5564 BFD_ASSERT (rel->r_offset % 8 == 0);
5565 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5566 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5567
5568 /* Mark the second slot of a GD or LD entry.
5569 -1 to indicate GD and -2 to indicate LD. */
5570 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5571 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5572 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5573 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5574 goto dodyn;
5575
5576 case R_PPC64_TPREL16:
5577 case R_PPC64_TPREL16_LO:
5578 case R_PPC64_TPREL16_HI:
5579 case R_PPC64_TPREL16_HA:
5580 case R_PPC64_TPREL16_DS:
5581 case R_PPC64_TPREL16_LO_DS:
5582 case R_PPC64_TPREL16_HIGH:
5583 case R_PPC64_TPREL16_HIGHA:
5584 case R_PPC64_TPREL16_HIGHER:
5585 case R_PPC64_TPREL16_HIGHERA:
5586 case R_PPC64_TPREL16_HIGHEST:
5587 case R_PPC64_TPREL16_HIGHESTA:
5588 if (info->shared)
5589 {
5590 if (!info->executable)
5591 info->flags |= DF_STATIC_TLS;
5592 goto dodyn;
5593 }
5594 break;
5595
5596 case R_PPC64_ADDR64:
5597 if (opd_sym_map != NULL
5598 && rel + 1 < rel_end
5599 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5600 {
5601 if (h != NULL)
5602 {
5603 if (h->root.root.string[0] == '.'
5604 && h->root.root.string[1] != 0
5605 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5606 ;
5607 else
5608 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5609 }
5610 else
5611 {
5612 asection *s;
5613 Elf_Internal_Sym *isym;
5614
5615 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5616 abfd, r_symndx);
5617 if (isym == NULL)
5618 return FALSE;
5619
5620 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5621 if (s != NULL && s != sec)
5622 opd_sym_map[rel->r_offset / 8] = s;
5623 }
5624 }
5625 /* Fall through. */
5626
5627 case R_PPC64_ADDR16:
5628 case R_PPC64_ADDR16_DS:
5629 case R_PPC64_ADDR16_HA:
5630 case R_PPC64_ADDR16_HI:
5631 case R_PPC64_ADDR16_HIGH:
5632 case R_PPC64_ADDR16_HIGHA:
5633 case R_PPC64_ADDR16_HIGHER:
5634 case R_PPC64_ADDR16_HIGHERA:
5635 case R_PPC64_ADDR16_HIGHEST:
5636 case R_PPC64_ADDR16_HIGHESTA:
5637 case R_PPC64_ADDR16_LO:
5638 case R_PPC64_ADDR16_LO_DS:
5639 if (h != NULL && !info->shared && abiversion (abfd) == 2
5640 && rel->r_addend == 0)
5641 {
5642 /* We may need a .plt entry if this reloc refers to a
5643 function in a shared lib. */
5644 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5645 return FALSE;
5646 h->pointer_equality_needed = 1;
5647 }
5648 /* Fall through. */
5649
5650 case R_PPC64_REL30:
5651 case R_PPC64_REL32:
5652 case R_PPC64_REL64:
5653 case R_PPC64_ADDR14:
5654 case R_PPC64_ADDR14_BRNTAKEN:
5655 case R_PPC64_ADDR14_BRTAKEN:
5656 case R_PPC64_ADDR24:
5657 case R_PPC64_ADDR32:
5658 case R_PPC64_UADDR16:
5659 case R_PPC64_UADDR32:
5660 case R_PPC64_UADDR64:
5661 case R_PPC64_TOC:
5662 if (h != NULL && !info->shared)
5663 /* We may need a copy reloc. */
5664 h->non_got_ref = 1;
5665
5666 /* Don't propagate .opd relocs. */
5667 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5668 break;
5669
5670 /* If we are creating a shared library, and this is a reloc
5671 against a global symbol, or a non PC relative reloc
5672 against a local symbol, then we need to copy the reloc
5673 into the shared library. However, if we are linking with
5674 -Bsymbolic, we do not need to copy a reloc against a
5675 global symbol which is defined in an object we are
5676 including in the link (i.e., DEF_REGULAR is set). At
5677 this point we have not seen all the input files, so it is
5678 possible that DEF_REGULAR is not set now but will be set
5679 later (it is never cleared). In case of a weak definition,
5680 DEF_REGULAR may be cleared later by a strong definition in
5681 a shared library. We account for that possibility below by
5682 storing information in the dyn_relocs field of the hash
5683 table entry. A similar situation occurs when creating
5684 shared libraries and symbol visibility changes render the
5685 symbol local.
5686
5687 If on the other hand, we are creating an executable, we
5688 may need to keep relocations for symbols satisfied by a
5689 dynamic library if we manage to avoid copy relocs for the
5690 symbol. */
5691 dodyn:
5692 if ((info->shared
5693 && (must_be_dyn_reloc (info, r_type)
5694 || (h != NULL
5695 && (!SYMBOLIC_BIND (info, h)
5696 || h->root.type == bfd_link_hash_defweak
5697 || !h->def_regular))))
5698 || (ELIMINATE_COPY_RELOCS
5699 && !info->shared
5700 && h != NULL
5701 && (h->root.type == bfd_link_hash_defweak
5702 || !h->def_regular))
5703 || (!info->shared
5704 && ifunc != NULL))
5705 {
5706 /* We must copy these reloc types into the output file.
5707 Create a reloc section in dynobj and make room for
5708 this reloc. */
5709 if (sreloc == NULL)
5710 {
5711 sreloc = _bfd_elf_make_dynamic_reloc_section
5712 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5713
5714 if (sreloc == NULL)
5715 return FALSE;
5716 }
5717
5718 /* If this is a global symbol, we count the number of
5719 relocations we need for this symbol. */
5720 if (h != NULL)
5721 {
5722 struct elf_dyn_relocs *p;
5723 struct elf_dyn_relocs **head;
5724
5725 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5726 p = *head;
5727 if (p == NULL || p->sec != sec)
5728 {
5729 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5730 if (p == NULL)
5731 return FALSE;
5732 p->next = *head;
5733 *head = p;
5734 p->sec = sec;
5735 p->count = 0;
5736 p->pc_count = 0;
5737 }
5738 p->count += 1;
5739 if (!must_be_dyn_reloc (info, r_type))
5740 p->pc_count += 1;
5741 }
5742 else
5743 {
5744 /* Track dynamic relocs needed for local syms too.
5745 We really need local syms available to do this
5746 easily. Oh well. */
5747 struct ppc_dyn_relocs *p;
5748 struct ppc_dyn_relocs **head;
5749 bfd_boolean is_ifunc;
5750 asection *s;
5751 void *vpp;
5752 Elf_Internal_Sym *isym;
5753
5754 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5755 abfd, r_symndx);
5756 if (isym == NULL)
5757 return FALSE;
5758
5759 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5760 if (s == NULL)
5761 s = sec;
5762
5763 vpp = &elf_section_data (s)->local_dynrel;
5764 head = (struct ppc_dyn_relocs **) vpp;
5765 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5766 p = *head;
5767 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5768 p = p->next;
5769 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5770 {
5771 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5772 if (p == NULL)
5773 return FALSE;
5774 p->next = *head;
5775 *head = p;
5776 p->sec = sec;
5777 p->ifunc = is_ifunc;
5778 p->count = 0;
5779 }
5780 p->count += 1;
5781 }
5782 }
5783 break;
5784
5785 default:
5786 break;
5787 }
5788 }
5789
5790 return TRUE;
5791 }
5792
5793 /* Merge backend specific data from an object file to the output
5794 object file when linking. */
5795
5796 static bfd_boolean
5797 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5798 {
5799 unsigned long iflags, oflags;
5800
5801 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5802 return TRUE;
5803
5804 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
5805 return TRUE;
5806
5807 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5808 return FALSE;
5809
5810 iflags = elf_elfheader (ibfd)->e_flags;
5811 oflags = elf_elfheader (obfd)->e_flags;
5812
5813 if (!elf_flags_init (obfd) || oflags == 0)
5814 {
5815 elf_flags_init (obfd) = TRUE;
5816 elf_elfheader (obfd)->e_flags = iflags;
5817 }
5818 else if (iflags == oflags || iflags == 0)
5819 ;
5820 else if (iflags & ~EF_PPC64_ABI)
5821 {
5822 (*_bfd_error_handler)
5823 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
5824 bfd_set_error (bfd_error_bad_value);
5825 return FALSE;
5826 }
5827 else
5828 {
5829 (*_bfd_error_handler)
5830 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
5831 ibfd, iflags, oflags);
5832 bfd_set_error (bfd_error_bad_value);
5833 return FALSE;
5834 }
5835
5836 /* Merge Tag_compatibility attributes and any common GNU ones. */
5837 _bfd_elf_merge_object_attributes (ibfd, obfd);
5838
5839 return TRUE;
5840 }
5841
5842 static bfd_boolean
5843 ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
5844 {
5845 /* Print normal ELF private data. */
5846 _bfd_elf_print_private_bfd_data (abfd, ptr);
5847
5848 if (elf_elfheader (abfd)->e_flags != 0)
5849 {
5850 FILE *file = ptr;
5851
5852 /* xgettext:c-format */
5853 fprintf (file, _("private flags = 0x%lx:"),
5854 elf_elfheader (abfd)->e_flags);
5855
5856 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
5857 fprintf (file, _(" [abiv%ld]"),
5858 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
5859 fputc ('\n', file);
5860 }
5861
5862 return TRUE;
5863 }
5864
5865 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5866 of the code entry point, and its section. */
5867
5868 static bfd_vma
5869 opd_entry_value (asection *opd_sec,
5870 bfd_vma offset,
5871 asection **code_sec,
5872 bfd_vma *code_off,
5873 bfd_boolean in_code_sec)
5874 {
5875 bfd *opd_bfd = opd_sec->owner;
5876 Elf_Internal_Rela *relocs;
5877 Elf_Internal_Rela *lo, *hi, *look;
5878 bfd_vma val;
5879
5880 /* No relocs implies we are linking a --just-symbols object, or looking
5881 at a final linked executable with addr2line or somesuch. */
5882 if (opd_sec->reloc_count == 0)
5883 {
5884 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
5885
5886 if (contents == NULL)
5887 {
5888 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
5889 return (bfd_vma) -1;
5890 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
5891 }
5892
5893 val = bfd_get_64 (opd_bfd, contents + offset);
5894 if (code_sec != NULL)
5895 {
5896 asection *sec, *likely = NULL;
5897
5898 if (in_code_sec)
5899 {
5900 sec = *code_sec;
5901 if (sec->vma <= val
5902 && val < sec->vma + sec->size)
5903 likely = sec;
5904 else
5905 val = -1;
5906 }
5907 else
5908 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5909 if (sec->vma <= val
5910 && (sec->flags & SEC_LOAD) != 0
5911 && (sec->flags & SEC_ALLOC) != 0)
5912 likely = sec;
5913 if (likely != NULL)
5914 {
5915 *code_sec = likely;
5916 if (code_off != NULL)
5917 *code_off = val - likely->vma;
5918 }
5919 }
5920 return val;
5921 }
5922
5923 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5924
5925 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5926 if (relocs == NULL)
5927 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5928
5929 /* Go find the opd reloc at the sym address. */
5930 lo = relocs;
5931 BFD_ASSERT (lo != NULL);
5932 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5933 val = (bfd_vma) -1;
5934 while (lo < hi)
5935 {
5936 look = lo + (hi - lo) / 2;
5937 if (look->r_offset < offset)
5938 lo = look + 1;
5939 else if (look->r_offset > offset)
5940 hi = look;
5941 else
5942 {
5943 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5944
5945 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5946 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5947 {
5948 unsigned long symndx = ELF64_R_SYM (look->r_info);
5949 asection *sec;
5950
5951 if (symndx < symtab_hdr->sh_info
5952 || elf_sym_hashes (opd_bfd) == NULL)
5953 {
5954 Elf_Internal_Sym *sym;
5955
5956 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5957 if (sym == NULL)
5958 {
5959 size_t symcnt = symtab_hdr->sh_info;
5960 if (elf_sym_hashes (opd_bfd) == NULL)
5961 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5962 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5963 0, NULL, NULL, NULL);
5964 if (sym == NULL)
5965 break;
5966 symtab_hdr->contents = (bfd_byte *) sym;
5967 }
5968
5969 sym += symndx;
5970 val = sym->st_value;
5971 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5972 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5973 }
5974 else
5975 {
5976 struct elf_link_hash_entry **sym_hashes;
5977 struct elf_link_hash_entry *rh;
5978
5979 sym_hashes = elf_sym_hashes (opd_bfd);
5980 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5981 if (rh != NULL)
5982 {
5983 rh = elf_follow_link (rh);
5984 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5985 || rh->root.type == bfd_link_hash_defweak);
5986 val = rh->root.u.def.value;
5987 sec = rh->root.u.def.section;
5988 }
5989 else
5990 {
5991 /* Handle the odd case where we can be called
5992 during bfd_elf_link_add_symbols before the
5993 symbol hashes have been fully populated. */
5994 Elf_Internal_Sym *sym;
5995
5996 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
5997 symndx, NULL, NULL, NULL);
5998 if (sym == NULL)
5999 break;
6000
6001 val = sym->st_value;
6002 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6003 free (sym);
6004 }
6005 }
6006 val += look->r_addend;
6007 if (code_off != NULL)
6008 *code_off = val;
6009 if (code_sec != NULL)
6010 {
6011 if (in_code_sec && *code_sec != sec)
6012 return -1;
6013 else
6014 *code_sec = sec;
6015 }
6016 if (sec != NULL && sec->output_section != NULL)
6017 val += sec->output_section->vma + sec->output_offset;
6018 }
6019 break;
6020 }
6021 }
6022
6023 return val;
6024 }
6025
6026 /* If the ELF symbol SYM might be a function in SEC, return the
6027 function size and set *CODE_OFF to the function's entry point,
6028 otherwise return zero. */
6029
6030 static bfd_size_type
6031 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6032 bfd_vma *code_off)
6033 {
6034 bfd_size_type size;
6035
6036 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6037 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6038 return 0;
6039
6040 size = 0;
6041 if (!(sym->flags & BSF_SYNTHETIC))
6042 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6043
6044 if (strcmp (sym->section->name, ".opd") == 0)
6045 {
6046 if (opd_entry_value (sym->section, sym->value,
6047 &sec, code_off, TRUE) == (bfd_vma) -1)
6048 return 0;
6049 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6050 symbol. This size has nothing to do with the code size of the
6051 function, which is what we're supposed to return, but the
6052 code size isn't available without looking up the dot-sym.
6053 However, doing that would be a waste of time particularly
6054 since elf_find_function will look at the dot-sym anyway.
6055 Now, elf_find_function will keep the largest size of any
6056 function sym found at the code address of interest, so return
6057 1 here to avoid it incorrectly caching a larger function size
6058 for a small function. This does mean we return the wrong
6059 size for a new-ABI function of size 24, but all that does is
6060 disable caching for such functions. */
6061 if (size == 24)
6062 size = 1;
6063 }
6064 else
6065 {
6066 if (sym->section != sec)
6067 return 0;
6068 *code_off = sym->value;
6069 }
6070 if (size == 0)
6071 size = 1;
6072 return size;
6073 }
6074
6075 /* Return true if symbol is defined in a regular object file. */
6076
6077 static bfd_boolean
6078 is_static_defined (struct elf_link_hash_entry *h)
6079 {
6080 return ((h->root.type == bfd_link_hash_defined
6081 || h->root.type == bfd_link_hash_defweak)
6082 && h->root.u.def.section != NULL
6083 && h->root.u.def.section->output_section != NULL);
6084 }
6085
6086 /* If FDH is a function descriptor symbol, return the associated code
6087 entry symbol if it is defined. Return NULL otherwise. */
6088
6089 static struct ppc_link_hash_entry *
6090 defined_code_entry (struct ppc_link_hash_entry *fdh)
6091 {
6092 if (fdh->is_func_descriptor)
6093 {
6094 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6095 if (fh->elf.root.type == bfd_link_hash_defined
6096 || fh->elf.root.type == bfd_link_hash_defweak)
6097 return fh;
6098 }
6099 return NULL;
6100 }
6101
6102 /* If FH is a function code entry symbol, return the associated
6103 function descriptor symbol if it is defined. Return NULL otherwise. */
6104
6105 static struct ppc_link_hash_entry *
6106 defined_func_desc (struct ppc_link_hash_entry *fh)
6107 {
6108 if (fh->oh != NULL
6109 && fh->oh->is_func_descriptor)
6110 {
6111 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6112 if (fdh->elf.root.type == bfd_link_hash_defined
6113 || fdh->elf.root.type == bfd_link_hash_defweak)
6114 return fdh;
6115 }
6116 return NULL;
6117 }
6118
6119 /* Mark all our entry sym sections, both opd and code section. */
6120
6121 static void
6122 ppc64_elf_gc_keep (struct bfd_link_info *info)
6123 {
6124 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6125 struct bfd_sym_chain *sym;
6126
6127 if (htab == NULL)
6128 return;
6129
6130 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6131 {
6132 struct ppc_link_hash_entry *eh, *fh;
6133 asection *sec;
6134
6135 eh = (struct ppc_link_hash_entry *)
6136 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6137 if (eh == NULL)
6138 continue;
6139 if (eh->elf.root.type != bfd_link_hash_defined
6140 && eh->elf.root.type != bfd_link_hash_defweak)
6141 continue;
6142
6143 fh = defined_code_entry (eh);
6144 if (fh != NULL)
6145 {
6146 sec = fh->elf.root.u.def.section;
6147 sec->flags |= SEC_KEEP;
6148 }
6149 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6150 && opd_entry_value (eh->elf.root.u.def.section,
6151 eh->elf.root.u.def.value,
6152 &sec, NULL, FALSE) != (bfd_vma) -1)
6153 sec->flags |= SEC_KEEP;
6154
6155 sec = eh->elf.root.u.def.section;
6156 sec->flags |= SEC_KEEP;
6157 }
6158 }
6159
6160 /* Mark sections containing dynamically referenced symbols. When
6161 building shared libraries, we must assume that any visible symbol is
6162 referenced. */
6163
6164 static bfd_boolean
6165 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6166 {
6167 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6168 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6169 struct ppc_link_hash_entry *fdh;
6170 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6171
6172 /* Dynamic linking info is on the func descriptor sym. */
6173 fdh = defined_func_desc (eh);
6174 if (fdh != NULL)
6175 eh = fdh;
6176
6177 if ((eh->elf.root.type == bfd_link_hash_defined
6178 || eh->elf.root.type == bfd_link_hash_defweak)
6179 && (eh->elf.ref_dynamic
6180 || (eh->elf.def_regular
6181 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6182 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6183 && (!info->executable
6184 || info->export_dynamic
6185 || (eh->elf.dynamic
6186 && d != NULL
6187 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6188 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6189 || !bfd_hide_sym_by_version (info->version_info,
6190 eh->elf.root.root.string)))))
6191 {
6192 asection *code_sec;
6193 struct ppc_link_hash_entry *fh;
6194
6195 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6196
6197 /* Function descriptor syms cause the associated
6198 function code sym section to be marked. */
6199 fh = defined_code_entry (eh);
6200 if (fh != NULL)
6201 {
6202 code_sec = fh->elf.root.u.def.section;
6203 code_sec->flags |= SEC_KEEP;
6204 }
6205 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6206 && opd_entry_value (eh->elf.root.u.def.section,
6207 eh->elf.root.u.def.value,
6208 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6209 code_sec->flags |= SEC_KEEP;
6210 }
6211
6212 return TRUE;
6213 }
6214
6215 /* Return the section that should be marked against GC for a given
6216 relocation. */
6217
6218 static asection *
6219 ppc64_elf_gc_mark_hook (asection *sec,
6220 struct bfd_link_info *info,
6221 Elf_Internal_Rela *rel,
6222 struct elf_link_hash_entry *h,
6223 Elf_Internal_Sym *sym)
6224 {
6225 asection *rsec;
6226
6227 /* Syms return NULL if we're marking .opd, so we avoid marking all
6228 function sections, as all functions are referenced in .opd. */
6229 rsec = NULL;
6230 if (get_opd_info (sec) != NULL)
6231 return rsec;
6232
6233 if (h != NULL)
6234 {
6235 enum elf_ppc64_reloc_type r_type;
6236 struct ppc_link_hash_entry *eh, *fh, *fdh;
6237
6238 r_type = ELF64_R_TYPE (rel->r_info);
6239 switch (r_type)
6240 {
6241 case R_PPC64_GNU_VTINHERIT:
6242 case R_PPC64_GNU_VTENTRY:
6243 break;
6244
6245 default:
6246 switch (h->root.type)
6247 {
6248 case bfd_link_hash_defined:
6249 case bfd_link_hash_defweak:
6250 eh = (struct ppc_link_hash_entry *) h;
6251 fdh = defined_func_desc (eh);
6252 if (fdh != NULL)
6253 eh = fdh;
6254
6255 /* Function descriptor syms cause the associated
6256 function code sym section to be marked. */
6257 fh = defined_code_entry (eh);
6258 if (fh != NULL)
6259 {
6260 /* They also mark their opd section. */
6261 eh->elf.root.u.def.section->gc_mark = 1;
6262
6263 rsec = fh->elf.root.u.def.section;
6264 }
6265 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6266 && opd_entry_value (eh->elf.root.u.def.section,
6267 eh->elf.root.u.def.value,
6268 &rsec, NULL, FALSE) != (bfd_vma) -1)
6269 eh->elf.root.u.def.section->gc_mark = 1;
6270 else
6271 rsec = h->root.u.def.section;
6272 break;
6273
6274 case bfd_link_hash_common:
6275 rsec = h->root.u.c.p->section;
6276 break;
6277
6278 default:
6279 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6280 }
6281 }
6282 }
6283 else
6284 {
6285 struct _opd_sec_data *opd;
6286
6287 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6288 opd = get_opd_info (rsec);
6289 if (opd != NULL && opd->func_sec != NULL)
6290 {
6291 rsec->gc_mark = 1;
6292
6293 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
6294 }
6295 }
6296
6297 return rsec;
6298 }
6299
6300 /* Update the .got, .plt. and dynamic reloc reference counts for the
6301 section being removed. */
6302
6303 static bfd_boolean
6304 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6305 asection *sec, const Elf_Internal_Rela *relocs)
6306 {
6307 struct ppc_link_hash_table *htab;
6308 Elf_Internal_Shdr *symtab_hdr;
6309 struct elf_link_hash_entry **sym_hashes;
6310 struct got_entry **local_got_ents;
6311 const Elf_Internal_Rela *rel, *relend;
6312
6313 if (info->relocatable)
6314 return TRUE;
6315
6316 if ((sec->flags & SEC_ALLOC) == 0)
6317 return TRUE;
6318
6319 elf_section_data (sec)->local_dynrel = NULL;
6320
6321 htab = ppc_hash_table (info);
6322 if (htab == NULL)
6323 return FALSE;
6324
6325 symtab_hdr = &elf_symtab_hdr (abfd);
6326 sym_hashes = elf_sym_hashes (abfd);
6327 local_got_ents = elf_local_got_ents (abfd);
6328
6329 relend = relocs + sec->reloc_count;
6330 for (rel = relocs; rel < relend; rel++)
6331 {
6332 unsigned long r_symndx;
6333 enum elf_ppc64_reloc_type r_type;
6334 struct elf_link_hash_entry *h = NULL;
6335 unsigned char tls_type = 0;
6336
6337 r_symndx = ELF64_R_SYM (rel->r_info);
6338 r_type = ELF64_R_TYPE (rel->r_info);
6339 if (r_symndx >= symtab_hdr->sh_info)
6340 {
6341 struct ppc_link_hash_entry *eh;
6342 struct elf_dyn_relocs **pp;
6343 struct elf_dyn_relocs *p;
6344
6345 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6346 h = elf_follow_link (h);
6347 eh = (struct ppc_link_hash_entry *) h;
6348
6349 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6350 if (p->sec == sec)
6351 {
6352 /* Everything must go for SEC. */
6353 *pp = p->next;
6354 break;
6355 }
6356 }
6357
6358 if (is_branch_reloc (r_type))
6359 {
6360 struct plt_entry **ifunc = NULL;
6361 if (h != NULL)
6362 {
6363 if (h->type == STT_GNU_IFUNC)
6364 ifunc = &h->plt.plist;
6365 }
6366 else if (local_got_ents != NULL)
6367 {
6368 struct plt_entry **local_plt = (struct plt_entry **)
6369 (local_got_ents + symtab_hdr->sh_info);
6370 unsigned char *local_got_tls_masks = (unsigned char *)
6371 (local_plt + symtab_hdr->sh_info);
6372 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6373 ifunc = local_plt + r_symndx;
6374 }
6375 if (ifunc != NULL)
6376 {
6377 struct plt_entry *ent;
6378
6379 for (ent = *ifunc; ent != NULL; ent = ent->next)
6380 if (ent->addend == rel->r_addend)
6381 break;
6382 if (ent == NULL)
6383 abort ();
6384 if (ent->plt.refcount > 0)
6385 ent->plt.refcount -= 1;
6386 continue;
6387 }
6388 }
6389
6390 switch (r_type)
6391 {
6392 case R_PPC64_GOT_TLSLD16:
6393 case R_PPC64_GOT_TLSLD16_LO:
6394 case R_PPC64_GOT_TLSLD16_HI:
6395 case R_PPC64_GOT_TLSLD16_HA:
6396 tls_type = TLS_TLS | TLS_LD;
6397 goto dogot;
6398
6399 case R_PPC64_GOT_TLSGD16:
6400 case R_PPC64_GOT_TLSGD16_LO:
6401 case R_PPC64_GOT_TLSGD16_HI:
6402 case R_PPC64_GOT_TLSGD16_HA:
6403 tls_type = TLS_TLS | TLS_GD;
6404 goto dogot;
6405
6406 case R_PPC64_GOT_TPREL16_DS:
6407 case R_PPC64_GOT_TPREL16_LO_DS:
6408 case R_PPC64_GOT_TPREL16_HI:
6409 case R_PPC64_GOT_TPREL16_HA:
6410 tls_type = TLS_TLS | TLS_TPREL;
6411 goto dogot;
6412
6413 case R_PPC64_GOT_DTPREL16_DS:
6414 case R_PPC64_GOT_DTPREL16_LO_DS:
6415 case R_PPC64_GOT_DTPREL16_HI:
6416 case R_PPC64_GOT_DTPREL16_HA:
6417 tls_type = TLS_TLS | TLS_DTPREL;
6418 goto dogot;
6419
6420 case R_PPC64_GOT16:
6421 case R_PPC64_GOT16_DS:
6422 case R_PPC64_GOT16_HA:
6423 case R_PPC64_GOT16_HI:
6424 case R_PPC64_GOT16_LO:
6425 case R_PPC64_GOT16_LO_DS:
6426 dogot:
6427 {
6428 struct got_entry *ent;
6429
6430 if (h != NULL)
6431 ent = h->got.glist;
6432 else
6433 ent = local_got_ents[r_symndx];
6434
6435 for (; ent != NULL; ent = ent->next)
6436 if (ent->addend == rel->r_addend
6437 && ent->owner == abfd
6438 && ent->tls_type == tls_type)
6439 break;
6440 if (ent == NULL)
6441 abort ();
6442 if (ent->got.refcount > 0)
6443 ent->got.refcount -= 1;
6444 }
6445 break;
6446
6447 case R_PPC64_PLT16_HA:
6448 case R_PPC64_PLT16_HI:
6449 case R_PPC64_PLT16_LO:
6450 case R_PPC64_PLT32:
6451 case R_PPC64_PLT64:
6452 case R_PPC64_REL14:
6453 case R_PPC64_REL14_BRNTAKEN:
6454 case R_PPC64_REL14_BRTAKEN:
6455 case R_PPC64_REL24:
6456 if (h != NULL)
6457 {
6458 struct plt_entry *ent;
6459
6460 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6461 if (ent->addend == rel->r_addend)
6462 break;
6463 if (ent != NULL && ent->plt.refcount > 0)
6464 ent->plt.refcount -= 1;
6465 }
6466 break;
6467
6468 default:
6469 break;
6470 }
6471 }
6472 return TRUE;
6473 }
6474
6475 /* The maximum size of .sfpr. */
6476 #define SFPR_MAX (218*4)
6477
6478 struct sfpr_def_parms
6479 {
6480 const char name[12];
6481 unsigned char lo, hi;
6482 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6483 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6484 };
6485
6486 /* Auto-generate _save*, _rest* functions in .sfpr. */
6487
6488 static bfd_boolean
6489 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6490 {
6491 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6492 unsigned int i;
6493 size_t len = strlen (parm->name);
6494 bfd_boolean writing = FALSE;
6495 char sym[16];
6496
6497 if (htab == NULL)
6498 return FALSE;
6499
6500 memcpy (sym, parm->name, len);
6501 sym[len + 2] = 0;
6502
6503 for (i = parm->lo; i <= parm->hi; i++)
6504 {
6505 struct elf_link_hash_entry *h;
6506
6507 sym[len + 0] = i / 10 + '0';
6508 sym[len + 1] = i % 10 + '0';
6509 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6510 if (h != NULL
6511 && !h->def_regular)
6512 {
6513 h->root.type = bfd_link_hash_defined;
6514 h->root.u.def.section = htab->sfpr;
6515 h->root.u.def.value = htab->sfpr->size;
6516 h->type = STT_FUNC;
6517 h->def_regular = 1;
6518 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6519 writing = TRUE;
6520 if (htab->sfpr->contents == NULL)
6521 {
6522 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6523 if (htab->sfpr->contents == NULL)
6524 return FALSE;
6525 }
6526 }
6527 if (writing)
6528 {
6529 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6530 if (i != parm->hi)
6531 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6532 else
6533 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6534 htab->sfpr->size = p - htab->sfpr->contents;
6535 }
6536 }
6537
6538 return TRUE;
6539 }
6540
6541 static bfd_byte *
6542 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6543 {
6544 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6545 return p + 4;
6546 }
6547
6548 static bfd_byte *
6549 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6550 {
6551 p = savegpr0 (abfd, p, r);
6552 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6553 p = p + 4;
6554 bfd_put_32 (abfd, BLR, p);
6555 return p + 4;
6556 }
6557
6558 static bfd_byte *
6559 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6560 {
6561 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6562 return p + 4;
6563 }
6564
6565 static bfd_byte *
6566 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6567 {
6568 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6569 p = p + 4;
6570 p = restgpr0 (abfd, p, r);
6571 bfd_put_32 (abfd, MTLR_R0, p);
6572 p = p + 4;
6573 if (r == 29)
6574 {
6575 p = restgpr0 (abfd, p, 30);
6576 p = restgpr0 (abfd, p, 31);
6577 }
6578 bfd_put_32 (abfd, BLR, p);
6579 return p + 4;
6580 }
6581
6582 static bfd_byte *
6583 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6584 {
6585 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6586 return p + 4;
6587 }
6588
6589 static bfd_byte *
6590 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6591 {
6592 p = savegpr1 (abfd, p, r);
6593 bfd_put_32 (abfd, BLR, p);
6594 return p + 4;
6595 }
6596
6597 static bfd_byte *
6598 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6599 {
6600 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6601 return p + 4;
6602 }
6603
6604 static bfd_byte *
6605 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6606 {
6607 p = restgpr1 (abfd, p, r);
6608 bfd_put_32 (abfd, BLR, p);
6609 return p + 4;
6610 }
6611
6612 static bfd_byte *
6613 savefpr (bfd *abfd, bfd_byte *p, int r)
6614 {
6615 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6616 return p + 4;
6617 }
6618
6619 static bfd_byte *
6620 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6621 {
6622 p = savefpr (abfd, p, r);
6623 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6624 p = p + 4;
6625 bfd_put_32 (abfd, BLR, p);
6626 return p + 4;
6627 }
6628
6629 static bfd_byte *
6630 restfpr (bfd *abfd, bfd_byte *p, int r)
6631 {
6632 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6633 return p + 4;
6634 }
6635
6636 static bfd_byte *
6637 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6638 {
6639 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6640 p = p + 4;
6641 p = restfpr (abfd, p, r);
6642 bfd_put_32 (abfd, MTLR_R0, p);
6643 p = p + 4;
6644 if (r == 29)
6645 {
6646 p = restfpr (abfd, p, 30);
6647 p = restfpr (abfd, p, 31);
6648 }
6649 bfd_put_32 (abfd, BLR, p);
6650 return p + 4;
6651 }
6652
6653 static bfd_byte *
6654 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6655 {
6656 p = savefpr (abfd, p, r);
6657 bfd_put_32 (abfd, BLR, p);
6658 return p + 4;
6659 }
6660
6661 static bfd_byte *
6662 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6663 {
6664 p = restfpr (abfd, p, r);
6665 bfd_put_32 (abfd, BLR, p);
6666 return p + 4;
6667 }
6668
6669 static bfd_byte *
6670 savevr (bfd *abfd, bfd_byte *p, int r)
6671 {
6672 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6673 p = p + 4;
6674 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6675 return p + 4;
6676 }
6677
6678 static bfd_byte *
6679 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6680 {
6681 p = savevr (abfd, p, r);
6682 bfd_put_32 (abfd, BLR, p);
6683 return p + 4;
6684 }
6685
6686 static bfd_byte *
6687 restvr (bfd *abfd, bfd_byte *p, int r)
6688 {
6689 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6690 p = p + 4;
6691 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6692 return p + 4;
6693 }
6694
6695 static bfd_byte *
6696 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6697 {
6698 p = restvr (abfd, p, r);
6699 bfd_put_32 (abfd, BLR, p);
6700 return p + 4;
6701 }
6702
6703 /* Called via elf_link_hash_traverse to transfer dynamic linking
6704 information on function code symbol entries to their corresponding
6705 function descriptor symbol entries. */
6706
6707 static bfd_boolean
6708 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6709 {
6710 struct bfd_link_info *info;
6711 struct ppc_link_hash_table *htab;
6712 struct plt_entry *ent;
6713 struct ppc_link_hash_entry *fh;
6714 struct ppc_link_hash_entry *fdh;
6715 bfd_boolean force_local;
6716
6717 fh = (struct ppc_link_hash_entry *) h;
6718 if (fh->elf.root.type == bfd_link_hash_indirect)
6719 return TRUE;
6720
6721 info = inf;
6722 htab = ppc_hash_table (info);
6723 if (htab == NULL)
6724 return FALSE;
6725
6726 /* Resolve undefined references to dot-symbols as the value
6727 in the function descriptor, if we have one in a regular object.
6728 This is to satisfy cases like ".quad .foo". Calls to functions
6729 in dynamic objects are handled elsewhere. */
6730 if (fh->elf.root.type == bfd_link_hash_undefweak
6731 && fh->was_undefined
6732 && (fdh = defined_func_desc (fh)) != NULL
6733 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6734 && opd_entry_value (fdh->elf.root.u.def.section,
6735 fdh->elf.root.u.def.value,
6736 &fh->elf.root.u.def.section,
6737 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6738 {
6739 fh->elf.root.type = fdh->elf.root.type;
6740 fh->elf.forced_local = 1;
6741 fh->elf.def_regular = fdh->elf.def_regular;
6742 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6743 }
6744
6745 /* If this is a function code symbol, transfer dynamic linking
6746 information to the function descriptor symbol. */
6747 if (!fh->is_func)
6748 return TRUE;
6749
6750 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6751 if (ent->plt.refcount > 0)
6752 break;
6753 if (ent == NULL
6754 || fh->elf.root.root.string[0] != '.'
6755 || fh->elf.root.root.string[1] == '\0')
6756 return TRUE;
6757
6758 /* Find the corresponding function descriptor symbol. Create it
6759 as undefined if necessary. */
6760
6761 fdh = lookup_fdh (fh, htab);
6762 if (fdh == NULL
6763 && !info->executable
6764 && (fh->elf.root.type == bfd_link_hash_undefined
6765 || fh->elf.root.type == bfd_link_hash_undefweak))
6766 {
6767 fdh = make_fdh (info, fh);
6768 if (fdh == NULL)
6769 return FALSE;
6770 }
6771
6772 /* Fake function descriptors are made undefweak. If the function
6773 code symbol is strong undefined, make the fake sym the same.
6774 If the function code symbol is defined, then force the fake
6775 descriptor local; We can't support overriding of symbols in a
6776 shared library on a fake descriptor. */
6777
6778 if (fdh != NULL
6779 && fdh->fake
6780 && fdh->elf.root.type == bfd_link_hash_undefweak)
6781 {
6782 if (fh->elf.root.type == bfd_link_hash_undefined)
6783 {
6784 fdh->elf.root.type = bfd_link_hash_undefined;
6785 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6786 }
6787 else if (fh->elf.root.type == bfd_link_hash_defined
6788 || fh->elf.root.type == bfd_link_hash_defweak)
6789 {
6790 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6791 }
6792 }
6793
6794 if (fdh != NULL
6795 && !fdh->elf.forced_local
6796 && (!info->executable
6797 || fdh->elf.def_dynamic
6798 || fdh->elf.ref_dynamic
6799 || (fdh->elf.root.type == bfd_link_hash_undefweak
6800 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6801 {
6802 if (fdh->elf.dynindx == -1)
6803 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6804 return FALSE;
6805 fdh->elf.ref_regular |= fh->elf.ref_regular;
6806 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6807 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6808 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6809 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6810 {
6811 move_plt_plist (fh, fdh);
6812 fdh->elf.needs_plt = 1;
6813 }
6814 fdh->is_func_descriptor = 1;
6815 fdh->oh = fh;
6816 fh->oh = fdh;
6817 }
6818
6819 /* Now that the info is on the function descriptor, clear the
6820 function code sym info. Any function code syms for which we
6821 don't have a definition in a regular file, we force local.
6822 This prevents a shared library from exporting syms that have
6823 been imported from another library. Function code syms that
6824 are really in the library we must leave global to prevent the
6825 linker dragging in a definition from a static library. */
6826 force_local = (!fh->elf.def_regular
6827 || fdh == NULL
6828 || !fdh->elf.def_regular
6829 || fdh->elf.forced_local);
6830 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6831
6832 return TRUE;
6833 }
6834
6835 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6836 this hook to a) provide some gcc support functions, and b) transfer
6837 dynamic linking information gathered so far on function code symbol
6838 entries, to their corresponding function descriptor symbol entries. */
6839
6840 static bfd_boolean
6841 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6842 struct bfd_link_info *info)
6843 {
6844 struct ppc_link_hash_table *htab;
6845 unsigned int i;
6846 static const struct sfpr_def_parms funcs[] =
6847 {
6848 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6849 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6850 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6851 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6852 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6853 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6854 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6855 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6856 { "._savef", 14, 31, savefpr, savefpr1_tail },
6857 { "._restf", 14, 31, restfpr, restfpr1_tail },
6858 { "_savevr_", 20, 31, savevr, savevr_tail },
6859 { "_restvr_", 20, 31, restvr, restvr_tail }
6860 };
6861
6862 htab = ppc_hash_table (info);
6863 if (htab == NULL)
6864 return FALSE;
6865
6866 if (!info->relocatable
6867 && htab->elf.hgot != NULL)
6868 {
6869 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6870 /* Make .TOC. defined so as to prevent it being made dynamic.
6871 The wrong value here is fixed later in ppc64_elf_set_toc. */
6872 htab->elf.hgot->type = STT_OBJECT;
6873 htab->elf.hgot->root.type = bfd_link_hash_defined;
6874 htab->elf.hgot->root.u.def.value = 0;
6875 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
6876 htab->elf.hgot->def_regular = 1;
6877 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
6878 | STV_HIDDEN);
6879 }
6880
6881 if (htab->sfpr == NULL)
6882 /* We don't have any relocs. */
6883 return TRUE;
6884
6885 /* Provide any missing _save* and _rest* functions. */
6886 htab->sfpr->size = 0;
6887 if (htab->params->save_restore_funcs)
6888 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6889 if (!sfpr_define (info, &funcs[i]))
6890 return FALSE;
6891
6892 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6893
6894 if (htab->sfpr->size == 0)
6895 htab->sfpr->flags |= SEC_EXCLUDE;
6896
6897 return TRUE;
6898 }
6899
6900 /* Return true if we have dynamic relocs that apply to read-only sections. */
6901
6902 static bfd_boolean
6903 readonly_dynrelocs (struct elf_link_hash_entry *h)
6904 {
6905 struct ppc_link_hash_entry *eh;
6906 struct elf_dyn_relocs *p;
6907
6908 eh = (struct ppc_link_hash_entry *) h;
6909 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6910 {
6911 asection *s = p->sec->output_section;
6912
6913 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6914 return TRUE;
6915 }
6916 return FALSE;
6917 }
6918
6919 /* Adjust a symbol defined by a dynamic object and referenced by a
6920 regular object. The current definition is in some section of the
6921 dynamic object, but we're not including those sections. We have to
6922 change the definition to something the rest of the link can
6923 understand. */
6924
6925 static bfd_boolean
6926 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6927 struct elf_link_hash_entry *h)
6928 {
6929 struct ppc_link_hash_table *htab;
6930 asection *s;
6931
6932 htab = ppc_hash_table (info);
6933 if (htab == NULL)
6934 return FALSE;
6935
6936 /* Deal with function syms. */
6937 if (h->type == STT_FUNC
6938 || h->type == STT_GNU_IFUNC
6939 || h->needs_plt)
6940 {
6941 /* Clear procedure linkage table information for any symbol that
6942 won't need a .plt entry. */
6943 struct plt_entry *ent;
6944 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6945 if (ent->plt.refcount > 0)
6946 break;
6947 if (ent == NULL
6948 || (h->type != STT_GNU_IFUNC
6949 && (SYMBOL_CALLS_LOCAL (info, h)
6950 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6951 && h->root.type == bfd_link_hash_undefweak))))
6952 {
6953 h->plt.plist = NULL;
6954 h->needs_plt = 0;
6955 }
6956 else if (abiversion (info->output_bfd) == 2)
6957 {
6958 /* After adjust_dynamic_symbol, non_got_ref set in the
6959 non-shared case means that we have allocated space in
6960 .dynbss for the symbol and thus dyn_relocs for this
6961 symbol should be discarded.
6962 If we get here we know we are making a PLT entry for this
6963 symbol, and in an executable we'd normally resolve
6964 relocations against this symbol to the PLT entry. Allow
6965 dynamic relocs if the reference is weak, and the dynamic
6966 relocs will not cause text relocation. */
6967 if (!h->ref_regular_nonweak
6968 && h->non_got_ref
6969 && h->type != STT_GNU_IFUNC
6970 && !readonly_dynrelocs (h))
6971 h->non_got_ref = 0;
6972
6973 /* If making a plt entry, then we don't need copy relocs. */
6974 return TRUE;
6975 }
6976 }
6977 else
6978 h->plt.plist = NULL;
6979
6980 /* If this is a weak symbol, and there is a real definition, the
6981 processor independent code will have arranged for us to see the
6982 real definition first, and we can just use the same value. */
6983 if (h->u.weakdef != NULL)
6984 {
6985 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6986 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6987 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6988 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6989 if (ELIMINATE_COPY_RELOCS)
6990 h->non_got_ref = h->u.weakdef->non_got_ref;
6991 return TRUE;
6992 }
6993
6994 /* If we are creating a shared library, we must presume that the
6995 only references to the symbol are via the global offset table.
6996 For such cases we need not do anything here; the relocations will
6997 be handled correctly by relocate_section. */
6998 if (info->shared)
6999 return TRUE;
7000
7001 /* If there are no references to this symbol that do not use the
7002 GOT, we don't need to generate a copy reloc. */
7003 if (!h->non_got_ref)
7004 return TRUE;
7005
7006 /* Don't generate a copy reloc for symbols defined in the executable. */
7007 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
7008 return TRUE;
7009
7010 /* If we didn't find any dynamic relocs in read-only sections, then
7011 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7012 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
7013 {
7014 h->non_got_ref = 0;
7015 return TRUE;
7016 }
7017
7018 if (h->plt.plist != NULL)
7019 {
7020 /* We should never get here, but unfortunately there are versions
7021 of gcc out there that improperly (for this ABI) put initialized
7022 function pointers, vtable refs and suchlike in read-only
7023 sections. Allow them to proceed, but warn that this might
7024 break at runtime. */
7025 info->callbacks->einfo
7026 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7027 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7028 h->root.root.string);
7029 }
7030
7031 /* This is a reference to a symbol defined by a dynamic object which
7032 is not a function. */
7033
7034 /* We must allocate the symbol in our .dynbss section, which will
7035 become part of the .bss section of the executable. There will be
7036 an entry for this symbol in the .dynsym section. The dynamic
7037 object will contain position independent code, so all references
7038 from the dynamic object to this symbol will go through the global
7039 offset table. The dynamic linker will use the .dynsym entry to
7040 determine the address it must put in the global offset table, so
7041 both the dynamic object and the regular object will refer to the
7042 same memory location for the variable. */
7043
7044 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7045 to copy the initial value out of the dynamic object and into the
7046 runtime process image. We need to remember the offset into the
7047 .rela.bss section we are going to use. */
7048 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7049 {
7050 htab->relbss->size += sizeof (Elf64_External_Rela);
7051 h->needs_copy = 1;
7052 }
7053
7054 s = htab->dynbss;
7055
7056 return _bfd_elf_adjust_dynamic_copy (h, s);
7057 }
7058
7059 /* If given a function descriptor symbol, hide both the function code
7060 sym and the descriptor. */
7061 static void
7062 ppc64_elf_hide_symbol (struct bfd_link_info *info,
7063 struct elf_link_hash_entry *h,
7064 bfd_boolean force_local)
7065 {
7066 struct ppc_link_hash_entry *eh;
7067 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7068
7069 eh = (struct ppc_link_hash_entry *) h;
7070 if (eh->is_func_descriptor)
7071 {
7072 struct ppc_link_hash_entry *fh = eh->oh;
7073
7074 if (fh == NULL)
7075 {
7076 const char *p, *q;
7077 struct ppc_link_hash_table *htab;
7078 char save;
7079
7080 /* We aren't supposed to use alloca in BFD because on
7081 systems which do not have alloca the version in libiberty
7082 calls xmalloc, which might cause the program to crash
7083 when it runs out of memory. This function doesn't have a
7084 return status, so there's no way to gracefully return an
7085 error. So cheat. We know that string[-1] can be safely
7086 accessed; It's either a string in an ELF string table,
7087 or allocated in an objalloc structure. */
7088
7089 p = eh->elf.root.root.string - 1;
7090 save = *p;
7091 *(char *) p = '.';
7092 htab = ppc_hash_table (info);
7093 if (htab == NULL)
7094 return;
7095
7096 fh = (struct ppc_link_hash_entry *)
7097 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7098 *(char *) p = save;
7099
7100 /* Unfortunately, if it so happens that the string we were
7101 looking for was allocated immediately before this string,
7102 then we overwrote the string terminator. That's the only
7103 reason the lookup should fail. */
7104 if (fh == NULL)
7105 {
7106 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7107 while (q >= eh->elf.root.root.string && *q == *p)
7108 --q, --p;
7109 if (q < eh->elf.root.root.string && *p == '.')
7110 fh = (struct ppc_link_hash_entry *)
7111 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
7112 }
7113 if (fh != NULL)
7114 {
7115 eh->oh = fh;
7116 fh->oh = eh;
7117 }
7118 }
7119 if (fh != NULL)
7120 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7121 }
7122 }
7123
7124 static bfd_boolean
7125 get_sym_h (struct elf_link_hash_entry **hp,
7126 Elf_Internal_Sym **symp,
7127 asection **symsecp,
7128 unsigned char **tls_maskp,
7129 Elf_Internal_Sym **locsymsp,
7130 unsigned long r_symndx,
7131 bfd *ibfd)
7132 {
7133 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7134
7135 if (r_symndx >= symtab_hdr->sh_info)
7136 {
7137 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7138 struct elf_link_hash_entry *h;
7139
7140 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7141 h = elf_follow_link (h);
7142
7143 if (hp != NULL)
7144 *hp = h;
7145
7146 if (symp != NULL)
7147 *symp = NULL;
7148
7149 if (symsecp != NULL)
7150 {
7151 asection *symsec = NULL;
7152 if (h->root.type == bfd_link_hash_defined
7153 || h->root.type == bfd_link_hash_defweak)
7154 symsec = h->root.u.def.section;
7155 *symsecp = symsec;
7156 }
7157
7158 if (tls_maskp != NULL)
7159 {
7160 struct ppc_link_hash_entry *eh;
7161
7162 eh = (struct ppc_link_hash_entry *) h;
7163 *tls_maskp = &eh->tls_mask;
7164 }
7165 }
7166 else
7167 {
7168 Elf_Internal_Sym *sym;
7169 Elf_Internal_Sym *locsyms = *locsymsp;
7170
7171 if (locsyms == NULL)
7172 {
7173 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7174 if (locsyms == NULL)
7175 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7176 symtab_hdr->sh_info,
7177 0, NULL, NULL, NULL);
7178 if (locsyms == NULL)
7179 return FALSE;
7180 *locsymsp = locsyms;
7181 }
7182 sym = locsyms + r_symndx;
7183
7184 if (hp != NULL)
7185 *hp = NULL;
7186
7187 if (symp != NULL)
7188 *symp = sym;
7189
7190 if (symsecp != NULL)
7191 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7192
7193 if (tls_maskp != NULL)
7194 {
7195 struct got_entry **lgot_ents;
7196 unsigned char *tls_mask;
7197
7198 tls_mask = NULL;
7199 lgot_ents = elf_local_got_ents (ibfd);
7200 if (lgot_ents != NULL)
7201 {
7202 struct plt_entry **local_plt = (struct plt_entry **)
7203 (lgot_ents + symtab_hdr->sh_info);
7204 unsigned char *lgot_masks = (unsigned char *)
7205 (local_plt + symtab_hdr->sh_info);
7206 tls_mask = &lgot_masks[r_symndx];
7207 }
7208 *tls_maskp = tls_mask;
7209 }
7210 }
7211 return TRUE;
7212 }
7213
7214 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7215 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7216 type suitable for optimization, and 1 otherwise. */
7217
7218 static int
7219 get_tls_mask (unsigned char **tls_maskp,
7220 unsigned long *toc_symndx,
7221 bfd_vma *toc_addend,
7222 Elf_Internal_Sym **locsymsp,
7223 const Elf_Internal_Rela *rel,
7224 bfd *ibfd)
7225 {
7226 unsigned long r_symndx;
7227 int next_r;
7228 struct elf_link_hash_entry *h;
7229 Elf_Internal_Sym *sym;
7230 asection *sec;
7231 bfd_vma off;
7232
7233 r_symndx = ELF64_R_SYM (rel->r_info);
7234 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7235 return 0;
7236
7237 if ((*tls_maskp != NULL && **tls_maskp != 0)
7238 || sec == NULL
7239 || ppc64_elf_section_data (sec) == NULL
7240 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7241 return 1;
7242
7243 /* Look inside a TOC section too. */
7244 if (h != NULL)
7245 {
7246 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7247 off = h->root.u.def.value;
7248 }
7249 else
7250 off = sym->st_value;
7251 off += rel->r_addend;
7252 BFD_ASSERT (off % 8 == 0);
7253 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7254 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7255 if (toc_symndx != NULL)
7256 *toc_symndx = r_symndx;
7257 if (toc_addend != NULL)
7258 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7259 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7260 return 0;
7261 if ((h == NULL || is_static_defined (h))
7262 && (next_r == -1 || next_r == -2))
7263 return 1 - next_r;
7264 return 1;
7265 }
7266
7267 /* Find (or create) an entry in the tocsave hash table. */
7268
7269 static struct tocsave_entry *
7270 tocsave_find (struct ppc_link_hash_table *htab,
7271 enum insert_option insert,
7272 Elf_Internal_Sym **local_syms,
7273 const Elf_Internal_Rela *irela,
7274 bfd *ibfd)
7275 {
7276 unsigned long r_indx;
7277 struct elf_link_hash_entry *h;
7278 Elf_Internal_Sym *sym;
7279 struct tocsave_entry ent, *p;
7280 hashval_t hash;
7281 struct tocsave_entry **slot;
7282
7283 r_indx = ELF64_R_SYM (irela->r_info);
7284 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7285 return NULL;
7286 if (ent.sec == NULL || ent.sec->output_section == NULL)
7287 {
7288 (*_bfd_error_handler)
7289 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7290 return NULL;
7291 }
7292
7293 if (h != NULL)
7294 ent.offset = h->root.u.def.value;
7295 else
7296 ent.offset = sym->st_value;
7297 ent.offset += irela->r_addend;
7298
7299 hash = tocsave_htab_hash (&ent);
7300 slot = ((struct tocsave_entry **)
7301 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7302 if (slot == NULL)
7303 return NULL;
7304
7305 if (*slot == NULL)
7306 {
7307 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7308 if (p == NULL)
7309 return NULL;
7310 *p = ent;
7311 *slot = p;
7312 }
7313 return *slot;
7314 }
7315
7316 /* Adjust all global syms defined in opd sections. In gcc generated
7317 code for the old ABI, these will already have been done. */
7318
7319 static bfd_boolean
7320 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7321 {
7322 struct ppc_link_hash_entry *eh;
7323 asection *sym_sec;
7324 struct _opd_sec_data *opd;
7325
7326 if (h->root.type == bfd_link_hash_indirect)
7327 return TRUE;
7328
7329 if (h->root.type != bfd_link_hash_defined
7330 && h->root.type != bfd_link_hash_defweak)
7331 return TRUE;
7332
7333 eh = (struct ppc_link_hash_entry *) h;
7334 if (eh->adjust_done)
7335 return TRUE;
7336
7337 sym_sec = eh->elf.root.u.def.section;
7338 opd = get_opd_info (sym_sec);
7339 if (opd != NULL && opd->adjust != NULL)
7340 {
7341 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
7342 if (adjust == -1)
7343 {
7344 /* This entry has been deleted. */
7345 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7346 if (dsec == NULL)
7347 {
7348 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7349 if (discarded_section (dsec))
7350 {
7351 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7352 break;
7353 }
7354 }
7355 eh->elf.root.u.def.value = 0;
7356 eh->elf.root.u.def.section = dsec;
7357 }
7358 else
7359 eh->elf.root.u.def.value += adjust;
7360 eh->adjust_done = 1;
7361 }
7362 return TRUE;
7363 }
7364
7365 /* Handles decrementing dynamic reloc counts for the reloc specified by
7366 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7367 have already been determined. */
7368
7369 static bfd_boolean
7370 dec_dynrel_count (bfd_vma r_info,
7371 asection *sec,
7372 struct bfd_link_info *info,
7373 Elf_Internal_Sym **local_syms,
7374 struct elf_link_hash_entry *h,
7375 Elf_Internal_Sym *sym)
7376 {
7377 enum elf_ppc64_reloc_type r_type;
7378 asection *sym_sec = NULL;
7379
7380 /* Can this reloc be dynamic? This switch, and later tests here
7381 should be kept in sync with the code in check_relocs. */
7382 r_type = ELF64_R_TYPE (r_info);
7383 switch (r_type)
7384 {
7385 default:
7386 return TRUE;
7387
7388 case R_PPC64_TPREL16:
7389 case R_PPC64_TPREL16_LO:
7390 case R_PPC64_TPREL16_HI:
7391 case R_PPC64_TPREL16_HA:
7392 case R_PPC64_TPREL16_DS:
7393 case R_PPC64_TPREL16_LO_DS:
7394 case R_PPC64_TPREL16_HIGH:
7395 case R_PPC64_TPREL16_HIGHA:
7396 case R_PPC64_TPREL16_HIGHER:
7397 case R_PPC64_TPREL16_HIGHERA:
7398 case R_PPC64_TPREL16_HIGHEST:
7399 case R_PPC64_TPREL16_HIGHESTA:
7400 if (!info->shared)
7401 return TRUE;
7402
7403 case R_PPC64_TPREL64:
7404 case R_PPC64_DTPMOD64:
7405 case R_PPC64_DTPREL64:
7406 case R_PPC64_ADDR64:
7407 case R_PPC64_REL30:
7408 case R_PPC64_REL32:
7409 case R_PPC64_REL64:
7410 case R_PPC64_ADDR14:
7411 case R_PPC64_ADDR14_BRNTAKEN:
7412 case R_PPC64_ADDR14_BRTAKEN:
7413 case R_PPC64_ADDR16:
7414 case R_PPC64_ADDR16_DS:
7415 case R_PPC64_ADDR16_HA:
7416 case R_PPC64_ADDR16_HI:
7417 case R_PPC64_ADDR16_HIGH:
7418 case R_PPC64_ADDR16_HIGHA:
7419 case R_PPC64_ADDR16_HIGHER:
7420 case R_PPC64_ADDR16_HIGHERA:
7421 case R_PPC64_ADDR16_HIGHEST:
7422 case R_PPC64_ADDR16_HIGHESTA:
7423 case R_PPC64_ADDR16_LO:
7424 case R_PPC64_ADDR16_LO_DS:
7425 case R_PPC64_ADDR24:
7426 case R_PPC64_ADDR32:
7427 case R_PPC64_UADDR16:
7428 case R_PPC64_UADDR32:
7429 case R_PPC64_UADDR64:
7430 case R_PPC64_TOC:
7431 break;
7432 }
7433
7434 if (local_syms != NULL)
7435 {
7436 unsigned long r_symndx;
7437 bfd *ibfd = sec->owner;
7438
7439 r_symndx = ELF64_R_SYM (r_info);
7440 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7441 return FALSE;
7442 }
7443
7444 if ((info->shared
7445 && (must_be_dyn_reloc (info, r_type)
7446 || (h != NULL
7447 && (!SYMBOLIC_BIND (info, h)
7448 || h->root.type == bfd_link_hash_defweak
7449 || !h->def_regular))))
7450 || (ELIMINATE_COPY_RELOCS
7451 && !info->shared
7452 && h != NULL
7453 && (h->root.type == bfd_link_hash_defweak
7454 || !h->def_regular)))
7455 ;
7456 else
7457 return TRUE;
7458
7459 if (h != NULL)
7460 {
7461 struct elf_dyn_relocs *p;
7462 struct elf_dyn_relocs **pp;
7463 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7464
7465 /* elf_gc_sweep may have already removed all dyn relocs associated
7466 with local syms for a given section. Also, symbol flags are
7467 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7468 report a dynreloc miscount. */
7469 if (*pp == NULL && info->gc_sections)
7470 return TRUE;
7471
7472 while ((p = *pp) != NULL)
7473 {
7474 if (p->sec == sec)
7475 {
7476 if (!must_be_dyn_reloc (info, r_type))
7477 p->pc_count -= 1;
7478 p->count -= 1;
7479 if (p->count == 0)
7480 *pp = p->next;
7481 return TRUE;
7482 }
7483 pp = &p->next;
7484 }
7485 }
7486 else
7487 {
7488 struct ppc_dyn_relocs *p;
7489 struct ppc_dyn_relocs **pp;
7490 void *vpp;
7491 bfd_boolean is_ifunc;
7492
7493 if (local_syms == NULL)
7494 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7495 if (sym_sec == NULL)
7496 sym_sec = sec;
7497
7498 vpp = &elf_section_data (sym_sec)->local_dynrel;
7499 pp = (struct ppc_dyn_relocs **) vpp;
7500
7501 if (*pp == NULL && info->gc_sections)
7502 return TRUE;
7503
7504 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7505 while ((p = *pp) != NULL)
7506 {
7507 if (p->sec == sec && p->ifunc == is_ifunc)
7508 {
7509 p->count -= 1;
7510 if (p->count == 0)
7511 *pp = p->next;
7512 return TRUE;
7513 }
7514 pp = &p->next;
7515 }
7516 }
7517
7518 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7519 sec->owner, sec);
7520 bfd_set_error (bfd_error_bad_value);
7521 return FALSE;
7522 }
7523
7524 /* Remove unused Official Procedure Descriptor entries. Currently we
7525 only remove those associated with functions in discarded link-once
7526 sections, or weakly defined functions that have been overridden. It
7527 would be possible to remove many more entries for statically linked
7528 applications. */
7529
7530 bfd_boolean
7531 ppc64_elf_edit_opd (struct bfd_link_info *info)
7532 {
7533 bfd *ibfd;
7534 bfd_boolean some_edited = FALSE;
7535 asection *need_pad = NULL;
7536 struct ppc_link_hash_table *htab;
7537
7538 htab = ppc_hash_table (info);
7539 if (htab == NULL)
7540 return FALSE;
7541
7542 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7543 {
7544 asection *sec;
7545 Elf_Internal_Rela *relstart, *rel, *relend;
7546 Elf_Internal_Shdr *symtab_hdr;
7547 Elf_Internal_Sym *local_syms;
7548 bfd_vma offset;
7549 struct _opd_sec_data *opd;
7550 bfd_boolean need_edit, add_aux_fields;
7551 bfd_size_type cnt_16b = 0;
7552
7553 if (!is_ppc64_elf (ibfd))
7554 continue;
7555
7556 sec = bfd_get_section_by_name (ibfd, ".opd");
7557 if (sec == NULL || sec->size == 0)
7558 continue;
7559
7560 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7561 continue;
7562
7563 if (sec->output_section == bfd_abs_section_ptr)
7564 continue;
7565
7566 /* Look through the section relocs. */
7567 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7568 continue;
7569
7570 local_syms = NULL;
7571 symtab_hdr = &elf_symtab_hdr (ibfd);
7572
7573 /* Read the relocations. */
7574 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7575 info->keep_memory);
7576 if (relstart == NULL)
7577 return FALSE;
7578
7579 /* First run through the relocs to check they are sane, and to
7580 determine whether we need to edit this opd section. */
7581 need_edit = FALSE;
7582 need_pad = sec;
7583 offset = 0;
7584 relend = relstart + sec->reloc_count;
7585 for (rel = relstart; rel < relend; )
7586 {
7587 enum elf_ppc64_reloc_type r_type;
7588 unsigned long r_symndx;
7589 asection *sym_sec;
7590 struct elf_link_hash_entry *h;
7591 Elf_Internal_Sym *sym;
7592
7593 /* .opd contains a regular array of 16 or 24 byte entries. We're
7594 only interested in the reloc pointing to a function entry
7595 point. */
7596 if (rel->r_offset != offset
7597 || rel + 1 >= relend
7598 || (rel + 1)->r_offset != offset + 8)
7599 {
7600 /* If someone messes with .opd alignment then after a
7601 "ld -r" we might have padding in the middle of .opd.
7602 Also, there's nothing to prevent someone putting
7603 something silly in .opd with the assembler. No .opd
7604 optimization for them! */
7605 broken_opd:
7606 (*_bfd_error_handler)
7607 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7608 need_edit = FALSE;
7609 break;
7610 }
7611
7612 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7613 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7614 {
7615 (*_bfd_error_handler)
7616 (_("%B: unexpected reloc type %u in .opd section"),
7617 ibfd, r_type);
7618 need_edit = FALSE;
7619 break;
7620 }
7621
7622 r_symndx = ELF64_R_SYM (rel->r_info);
7623 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7624 r_symndx, ibfd))
7625 goto error_ret;
7626
7627 if (sym_sec == NULL || sym_sec->owner == NULL)
7628 {
7629 const char *sym_name;
7630 if (h != NULL)
7631 sym_name = h->root.root.string;
7632 else
7633 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7634 sym_sec);
7635
7636 (*_bfd_error_handler)
7637 (_("%B: undefined sym `%s' in .opd section"),
7638 ibfd, sym_name);
7639 need_edit = FALSE;
7640 break;
7641 }
7642
7643 /* opd entries are always for functions defined in the
7644 current input bfd. If the symbol isn't defined in the
7645 input bfd, then we won't be using the function in this
7646 bfd; It must be defined in a linkonce section in another
7647 bfd, or is weak. It's also possible that we are
7648 discarding the function due to a linker script /DISCARD/,
7649 which we test for via the output_section. */
7650 if (sym_sec->owner != ibfd
7651 || sym_sec->output_section == bfd_abs_section_ptr)
7652 need_edit = TRUE;
7653
7654 rel += 2;
7655 if (rel == relend
7656 || (rel + 1 == relend && rel->r_offset == offset + 16))
7657 {
7658 if (sec->size == offset + 24)
7659 {
7660 need_pad = NULL;
7661 break;
7662 }
7663 if (rel == relend && sec->size == offset + 16)
7664 {
7665 cnt_16b++;
7666 break;
7667 }
7668 goto broken_opd;
7669 }
7670
7671 if (rel->r_offset == offset + 24)
7672 offset += 24;
7673 else if (rel->r_offset != offset + 16)
7674 goto broken_opd;
7675 else if (rel + 1 < relend
7676 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7677 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7678 {
7679 offset += 16;
7680 cnt_16b++;
7681 }
7682 else if (rel + 2 < relend
7683 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7684 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7685 {
7686 offset += 24;
7687 rel += 1;
7688 }
7689 else
7690 goto broken_opd;
7691 }
7692
7693 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
7694
7695 if (need_edit || add_aux_fields)
7696 {
7697 Elf_Internal_Rela *write_rel;
7698 Elf_Internal_Shdr *rel_hdr;
7699 bfd_byte *rptr, *wptr;
7700 bfd_byte *new_contents;
7701 bfd_boolean skip;
7702 long opd_ent_size;
7703 bfd_size_type amt;
7704
7705 new_contents = NULL;
7706 amt = sec->size * sizeof (long) / 8;
7707 opd = &ppc64_elf_section_data (sec)->u.opd;
7708 opd->adjust = bfd_zalloc (sec->owner, amt);
7709 if (opd->adjust == NULL)
7710 return FALSE;
7711 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7712
7713 /* This seems a waste of time as input .opd sections are all
7714 zeros as generated by gcc, but I suppose there's no reason
7715 this will always be so. We might start putting something in
7716 the third word of .opd entries. */
7717 if ((sec->flags & SEC_IN_MEMORY) == 0)
7718 {
7719 bfd_byte *loc;
7720 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7721 {
7722 if (loc != NULL)
7723 free (loc);
7724 error_ret:
7725 if (local_syms != NULL
7726 && symtab_hdr->contents != (unsigned char *) local_syms)
7727 free (local_syms);
7728 if (elf_section_data (sec)->relocs != relstart)
7729 free (relstart);
7730 return FALSE;
7731 }
7732 sec->contents = loc;
7733 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7734 }
7735
7736 elf_section_data (sec)->relocs = relstart;
7737
7738 new_contents = sec->contents;
7739 if (add_aux_fields)
7740 {
7741 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7742 if (new_contents == NULL)
7743 return FALSE;
7744 need_pad = FALSE;
7745 }
7746 wptr = new_contents;
7747 rptr = sec->contents;
7748
7749 write_rel = relstart;
7750 skip = FALSE;
7751 offset = 0;
7752 opd_ent_size = 0;
7753 for (rel = relstart; rel < relend; rel++)
7754 {
7755 unsigned long r_symndx;
7756 asection *sym_sec;
7757 struct elf_link_hash_entry *h;
7758 Elf_Internal_Sym *sym;
7759
7760 r_symndx = ELF64_R_SYM (rel->r_info);
7761 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7762 r_symndx, ibfd))
7763 goto error_ret;
7764
7765 if (rel->r_offset == offset)
7766 {
7767 struct ppc_link_hash_entry *fdh = NULL;
7768
7769 /* See if the .opd entry is full 24 byte or
7770 16 byte (with fd_aux entry overlapped with next
7771 fd_func). */
7772 opd_ent_size = 24;
7773 if ((rel + 2 == relend && sec->size == offset + 16)
7774 || (rel + 3 < relend
7775 && rel[2].r_offset == offset + 16
7776 && rel[3].r_offset == offset + 24
7777 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7778 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7779 opd_ent_size = 16;
7780
7781 if (h != NULL
7782 && h->root.root.string[0] == '.')
7783 {
7784 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h, htab);
7785 if (fdh != NULL
7786 && fdh->elf.root.type != bfd_link_hash_defined
7787 && fdh->elf.root.type != bfd_link_hash_defweak)
7788 fdh = NULL;
7789 }
7790
7791 skip = (sym_sec->owner != ibfd
7792 || sym_sec->output_section == bfd_abs_section_ptr);
7793 if (skip)
7794 {
7795 if (fdh != NULL && sym_sec->owner == ibfd)
7796 {
7797 /* Arrange for the function descriptor sym
7798 to be dropped. */
7799 fdh->elf.root.u.def.value = 0;
7800 fdh->elf.root.u.def.section = sym_sec;
7801 }
7802 opd->adjust[rel->r_offset / 8] = -1;
7803 }
7804 else
7805 {
7806 /* We'll be keeping this opd entry. */
7807
7808 if (fdh != NULL)
7809 {
7810 /* Redefine the function descriptor symbol to
7811 this location in the opd section. It is
7812 necessary to update the value here rather
7813 than using an array of adjustments as we do
7814 for local symbols, because various places
7815 in the generic ELF code use the value
7816 stored in u.def.value. */
7817 fdh->elf.root.u.def.value = wptr - new_contents;
7818 fdh->adjust_done = 1;
7819 }
7820
7821 /* Local syms are a bit tricky. We could
7822 tweak them as they can be cached, but
7823 we'd need to look through the local syms
7824 for the function descriptor sym which we
7825 don't have at the moment. So keep an
7826 array of adjustments. */
7827 opd->adjust[rel->r_offset / 8]
7828 = (wptr - new_contents) - (rptr - sec->contents);
7829
7830 if (wptr != rptr)
7831 memcpy (wptr, rptr, opd_ent_size);
7832 wptr += opd_ent_size;
7833 if (add_aux_fields && opd_ent_size == 16)
7834 {
7835 memset (wptr, '\0', 8);
7836 wptr += 8;
7837 }
7838 }
7839 rptr += opd_ent_size;
7840 offset += opd_ent_size;
7841 }
7842
7843 if (skip)
7844 {
7845 if (!NO_OPD_RELOCS
7846 && !info->relocatable
7847 && !dec_dynrel_count (rel->r_info, sec, info,
7848 NULL, h, sym))
7849 goto error_ret;
7850 }
7851 else
7852 {
7853 /* We need to adjust any reloc offsets to point to the
7854 new opd entries. While we're at it, we may as well
7855 remove redundant relocs. */
7856 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7857 if (write_rel != rel)
7858 memcpy (write_rel, rel, sizeof (*rel));
7859 ++write_rel;
7860 }
7861 }
7862
7863 sec->size = wptr - new_contents;
7864 sec->reloc_count = write_rel - relstart;
7865 if (add_aux_fields)
7866 {
7867 free (sec->contents);
7868 sec->contents = new_contents;
7869 }
7870
7871 /* Fudge the header size too, as this is used later in
7872 elf_bfd_final_link if we are emitting relocs. */
7873 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7874 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7875 some_edited = TRUE;
7876 }
7877 else if (elf_section_data (sec)->relocs != relstart)
7878 free (relstart);
7879
7880 if (local_syms != NULL
7881 && symtab_hdr->contents != (unsigned char *) local_syms)
7882 {
7883 if (!info->keep_memory)
7884 free (local_syms);
7885 else
7886 symtab_hdr->contents = (unsigned char *) local_syms;
7887 }
7888 }
7889
7890 if (some_edited)
7891 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7892
7893 /* If we are doing a final link and the last .opd entry is just 16 byte
7894 long, add a 8 byte padding after it. */
7895 if (need_pad != NULL && !info->relocatable)
7896 {
7897 bfd_byte *p;
7898
7899 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7900 {
7901 BFD_ASSERT (need_pad->size > 0);
7902
7903 p = bfd_malloc (need_pad->size + 8);
7904 if (p == NULL)
7905 return FALSE;
7906
7907 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7908 p, 0, need_pad->size))
7909 return FALSE;
7910
7911 need_pad->contents = p;
7912 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7913 }
7914 else
7915 {
7916 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7917 if (p == NULL)
7918 return FALSE;
7919
7920 need_pad->contents = p;
7921 }
7922
7923 memset (need_pad->contents + need_pad->size, 0, 8);
7924 need_pad->size += 8;
7925 }
7926
7927 return TRUE;
7928 }
7929
7930 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7931
7932 asection *
7933 ppc64_elf_tls_setup (struct bfd_link_info *info)
7934 {
7935 struct ppc_link_hash_table *htab;
7936
7937 htab = ppc_hash_table (info);
7938 if (htab == NULL)
7939 return NULL;
7940
7941 if (abiversion (info->output_bfd) == 1)
7942 htab->opd_abi = 1;
7943
7944 if (htab->params->no_multi_toc)
7945 htab->do_multi_toc = 0;
7946 else if (!htab->do_multi_toc)
7947 htab->params->no_multi_toc = 1;
7948
7949 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7950 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7951 FALSE, FALSE, TRUE));
7952 /* Move dynamic linking info to the function descriptor sym. */
7953 if (htab->tls_get_addr != NULL)
7954 func_desc_adjust (&htab->tls_get_addr->elf, info);
7955 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7956 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7957 FALSE, FALSE, TRUE));
7958 if (!htab->params->no_tls_get_addr_opt)
7959 {
7960 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7961
7962 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7963 FALSE, FALSE, TRUE);
7964 if (opt != NULL)
7965 func_desc_adjust (opt, info);
7966 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7967 FALSE, FALSE, TRUE);
7968 if (opt_fd != NULL
7969 && (opt_fd->root.type == bfd_link_hash_defined
7970 || opt_fd->root.type == bfd_link_hash_defweak))
7971 {
7972 /* If glibc supports an optimized __tls_get_addr call stub,
7973 signalled by the presence of __tls_get_addr_opt, and we'll
7974 be calling __tls_get_addr via a plt call stub, then
7975 make __tls_get_addr point to __tls_get_addr_opt. */
7976 tga_fd = &htab->tls_get_addr_fd->elf;
7977 if (htab->elf.dynamic_sections_created
7978 && tga_fd != NULL
7979 && (tga_fd->type == STT_FUNC
7980 || tga_fd->needs_plt)
7981 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7982 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7983 && tga_fd->root.type == bfd_link_hash_undefweak)))
7984 {
7985 struct plt_entry *ent;
7986
7987 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7988 if (ent->plt.refcount > 0)
7989 break;
7990 if (ent != NULL)
7991 {
7992 tga_fd->root.type = bfd_link_hash_indirect;
7993 tga_fd->root.u.i.link = &opt_fd->root;
7994 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7995 if (opt_fd->dynindx != -1)
7996 {
7997 /* Use __tls_get_addr_opt in dynamic relocations. */
7998 opt_fd->dynindx = -1;
7999 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8000 opt_fd->dynstr_index);
8001 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8002 return NULL;
8003 }
8004 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8005 tga = &htab->tls_get_addr->elf;
8006 if (opt != NULL && tga != NULL)
8007 {
8008 tga->root.type = bfd_link_hash_indirect;
8009 tga->root.u.i.link = &opt->root;
8010 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8011 _bfd_elf_link_hash_hide_symbol (info, opt,
8012 tga->forced_local);
8013 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8014 }
8015 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8016 htab->tls_get_addr_fd->is_func_descriptor = 1;
8017 if (htab->tls_get_addr != NULL)
8018 {
8019 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8020 htab->tls_get_addr->is_func = 1;
8021 }
8022 }
8023 }
8024 }
8025 else
8026 htab->params->no_tls_get_addr_opt = TRUE;
8027 }
8028 return _bfd_elf_tls_setup (info->output_bfd, info);
8029 }
8030
8031 /* Return TRUE iff REL is a branch reloc with a global symbol matching
8032 HASH1 or HASH2. */
8033
8034 static bfd_boolean
8035 branch_reloc_hash_match (const bfd *ibfd,
8036 const Elf_Internal_Rela *rel,
8037 const struct ppc_link_hash_entry *hash1,
8038 const struct ppc_link_hash_entry *hash2)
8039 {
8040 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8041 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8042 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8043
8044 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8045 {
8046 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8047 struct elf_link_hash_entry *h;
8048
8049 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8050 h = elf_follow_link (h);
8051 if (h == &hash1->elf || h == &hash2->elf)
8052 return TRUE;
8053 }
8054 return FALSE;
8055 }
8056
8057 /* Run through all the TLS relocs looking for optimization
8058 opportunities. The linker has been hacked (see ppc64elf.em) to do
8059 a preliminary section layout so that we know the TLS segment
8060 offsets. We can't optimize earlier because some optimizations need
8061 to know the tp offset, and we need to optimize before allocating
8062 dynamic relocations. */
8063
8064 bfd_boolean
8065 ppc64_elf_tls_optimize (struct bfd_link_info *info)
8066 {
8067 bfd *ibfd;
8068 asection *sec;
8069 struct ppc_link_hash_table *htab;
8070 unsigned char *toc_ref;
8071 int pass;
8072
8073 if (info->relocatable || !info->executable)
8074 return TRUE;
8075
8076 htab = ppc_hash_table (info);
8077 if (htab == NULL)
8078 return FALSE;
8079
8080 /* Make two passes over the relocs. On the first pass, mark toc
8081 entries involved with tls relocs, and check that tls relocs
8082 involved in setting up a tls_get_addr call are indeed followed by
8083 such a call. If they are not, we can't do any tls optimization.
8084 On the second pass twiddle tls_mask flags to notify
8085 relocate_section that optimization can be done, and adjust got
8086 and plt refcounts. */
8087 toc_ref = NULL;
8088 for (pass = 0; pass < 2; ++pass)
8089 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8090 {
8091 Elf_Internal_Sym *locsyms = NULL;
8092 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8093
8094 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8095 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8096 {
8097 Elf_Internal_Rela *relstart, *rel, *relend;
8098 bfd_boolean found_tls_get_addr_arg = 0;
8099
8100 /* Read the relocations. */
8101 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8102 info->keep_memory);
8103 if (relstart == NULL)
8104 {
8105 free (toc_ref);
8106 return FALSE;
8107 }
8108
8109 relend = relstart + sec->reloc_count;
8110 for (rel = relstart; rel < relend; rel++)
8111 {
8112 enum elf_ppc64_reloc_type r_type;
8113 unsigned long r_symndx;
8114 struct elf_link_hash_entry *h;
8115 Elf_Internal_Sym *sym;
8116 asection *sym_sec;
8117 unsigned char *tls_mask;
8118 unsigned char tls_set, tls_clear, tls_type = 0;
8119 bfd_vma value;
8120 bfd_boolean ok_tprel, is_local;
8121 long toc_ref_index = 0;
8122 int expecting_tls_get_addr = 0;
8123 bfd_boolean ret = FALSE;
8124
8125 r_symndx = ELF64_R_SYM (rel->r_info);
8126 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8127 r_symndx, ibfd))
8128 {
8129 err_free_rel:
8130 if (elf_section_data (sec)->relocs != relstart)
8131 free (relstart);
8132 if (toc_ref != NULL)
8133 free (toc_ref);
8134 if (locsyms != NULL
8135 && (elf_symtab_hdr (ibfd).contents
8136 != (unsigned char *) locsyms))
8137 free (locsyms);
8138 return ret;
8139 }
8140
8141 if (h != NULL)
8142 {
8143 if (h->root.type == bfd_link_hash_defined
8144 || h->root.type == bfd_link_hash_defweak)
8145 value = h->root.u.def.value;
8146 else if (h->root.type == bfd_link_hash_undefweak)
8147 value = 0;
8148 else
8149 {
8150 found_tls_get_addr_arg = 0;
8151 continue;
8152 }
8153 }
8154 else
8155 /* Symbols referenced by TLS relocs must be of type
8156 STT_TLS. So no need for .opd local sym adjust. */
8157 value = sym->st_value;
8158
8159 ok_tprel = FALSE;
8160 is_local = FALSE;
8161 if (h == NULL
8162 || !h->def_dynamic)
8163 {
8164 is_local = TRUE;
8165 if (h != NULL
8166 && h->root.type == bfd_link_hash_undefweak)
8167 ok_tprel = TRUE;
8168 else
8169 {
8170 value += sym_sec->output_offset;
8171 value += sym_sec->output_section->vma;
8172 value -= htab->elf.tls_sec->vma;
8173 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8174 < (bfd_vma) 1 << 32);
8175 }
8176 }
8177
8178 r_type = ELF64_R_TYPE (rel->r_info);
8179 /* If this section has old-style __tls_get_addr calls
8180 without marker relocs, then check that each
8181 __tls_get_addr call reloc is preceded by a reloc
8182 that conceivably belongs to the __tls_get_addr arg
8183 setup insn. If we don't find matching arg setup
8184 relocs, don't do any tls optimization. */
8185 if (pass == 0
8186 && sec->has_tls_get_addr_call
8187 && h != NULL
8188 && (h == &htab->tls_get_addr->elf
8189 || h == &htab->tls_get_addr_fd->elf)
8190 && !found_tls_get_addr_arg
8191 && is_branch_reloc (r_type))
8192 {
8193 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8194 "TLS optimization disabled\n"),
8195 ibfd, sec, rel->r_offset);
8196 ret = TRUE;
8197 goto err_free_rel;
8198 }
8199
8200 found_tls_get_addr_arg = 0;
8201 switch (r_type)
8202 {
8203 case R_PPC64_GOT_TLSLD16:
8204 case R_PPC64_GOT_TLSLD16_LO:
8205 expecting_tls_get_addr = 1;
8206 found_tls_get_addr_arg = 1;
8207 /* Fall thru */
8208
8209 case R_PPC64_GOT_TLSLD16_HI:
8210 case R_PPC64_GOT_TLSLD16_HA:
8211 /* These relocs should never be against a symbol
8212 defined in a shared lib. Leave them alone if
8213 that turns out to be the case. */
8214 if (!is_local)
8215 continue;
8216
8217 /* LD -> LE */
8218 tls_set = 0;
8219 tls_clear = TLS_LD;
8220 tls_type = TLS_TLS | TLS_LD;
8221 break;
8222
8223 case R_PPC64_GOT_TLSGD16:
8224 case R_PPC64_GOT_TLSGD16_LO:
8225 expecting_tls_get_addr = 1;
8226 found_tls_get_addr_arg = 1;
8227 /* Fall thru */
8228
8229 case R_PPC64_GOT_TLSGD16_HI:
8230 case R_PPC64_GOT_TLSGD16_HA:
8231 if (ok_tprel)
8232 /* GD -> LE */
8233 tls_set = 0;
8234 else
8235 /* GD -> IE */
8236 tls_set = TLS_TLS | TLS_TPRELGD;
8237 tls_clear = TLS_GD;
8238 tls_type = TLS_TLS | TLS_GD;
8239 break;
8240
8241 case R_PPC64_GOT_TPREL16_DS:
8242 case R_PPC64_GOT_TPREL16_LO_DS:
8243 case R_PPC64_GOT_TPREL16_HI:
8244 case R_PPC64_GOT_TPREL16_HA:
8245 if (ok_tprel)
8246 {
8247 /* IE -> LE */
8248 tls_set = 0;
8249 tls_clear = TLS_TPREL;
8250 tls_type = TLS_TLS | TLS_TPREL;
8251 break;
8252 }
8253 continue;
8254
8255 case R_PPC64_TLSGD:
8256 case R_PPC64_TLSLD:
8257 found_tls_get_addr_arg = 1;
8258 /* Fall thru */
8259
8260 case R_PPC64_TLS:
8261 case R_PPC64_TOC16:
8262 case R_PPC64_TOC16_LO:
8263 if (sym_sec == NULL || sym_sec != toc)
8264 continue;
8265
8266 /* Mark this toc entry as referenced by a TLS
8267 code sequence. We can do that now in the
8268 case of R_PPC64_TLS, and after checking for
8269 tls_get_addr for the TOC16 relocs. */
8270 if (toc_ref == NULL)
8271 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8272 if (toc_ref == NULL)
8273 goto err_free_rel;
8274
8275 if (h != NULL)
8276 value = h->root.u.def.value;
8277 else
8278 value = sym->st_value;
8279 value += rel->r_addend;
8280 BFD_ASSERT (value < toc->size && value % 8 == 0);
8281 toc_ref_index = (value + toc->output_offset) / 8;
8282 if (r_type == R_PPC64_TLS
8283 || r_type == R_PPC64_TLSGD
8284 || r_type == R_PPC64_TLSLD)
8285 {
8286 toc_ref[toc_ref_index] = 1;
8287 continue;
8288 }
8289
8290 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8291 continue;
8292
8293 tls_set = 0;
8294 tls_clear = 0;
8295 expecting_tls_get_addr = 2;
8296 break;
8297
8298 case R_PPC64_TPREL64:
8299 if (pass == 0
8300 || sec != toc
8301 || toc_ref == NULL
8302 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8303 continue;
8304 if (ok_tprel)
8305 {
8306 /* IE -> LE */
8307 tls_set = TLS_EXPLICIT;
8308 tls_clear = TLS_TPREL;
8309 break;
8310 }
8311 continue;
8312
8313 case R_PPC64_DTPMOD64:
8314 if (pass == 0
8315 || sec != toc
8316 || toc_ref == NULL
8317 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8318 continue;
8319 if (rel + 1 < relend
8320 && (rel[1].r_info
8321 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8322 && rel[1].r_offset == rel->r_offset + 8)
8323 {
8324 if (ok_tprel)
8325 /* GD -> LE */
8326 tls_set = TLS_EXPLICIT | TLS_GD;
8327 else
8328 /* GD -> IE */
8329 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8330 tls_clear = TLS_GD;
8331 }
8332 else
8333 {
8334 if (!is_local)
8335 continue;
8336
8337 /* LD -> LE */
8338 tls_set = TLS_EXPLICIT;
8339 tls_clear = TLS_LD;
8340 }
8341 break;
8342
8343 default:
8344 continue;
8345 }
8346
8347 if (pass == 0)
8348 {
8349 if (!expecting_tls_get_addr
8350 || !sec->has_tls_get_addr_call)
8351 continue;
8352
8353 if (rel + 1 < relend
8354 && branch_reloc_hash_match (ibfd, rel + 1,
8355 htab->tls_get_addr,
8356 htab->tls_get_addr_fd))
8357 {
8358 if (expecting_tls_get_addr == 2)
8359 {
8360 /* Check for toc tls entries. */
8361 unsigned char *toc_tls;
8362 int retval;
8363
8364 retval = get_tls_mask (&toc_tls, NULL, NULL,
8365 &locsyms,
8366 rel, ibfd);
8367 if (retval == 0)
8368 goto err_free_rel;
8369 if (toc_tls != NULL)
8370 {
8371 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8372 found_tls_get_addr_arg = 1;
8373 if (retval > 1)
8374 toc_ref[toc_ref_index] = 1;
8375 }
8376 }
8377 continue;
8378 }
8379
8380 if (expecting_tls_get_addr != 1)
8381 continue;
8382
8383 /* Uh oh, we didn't find the expected call. We
8384 could just mark this symbol to exclude it
8385 from tls optimization but it's safer to skip
8386 the entire optimization. */
8387 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8388 "TLS optimization disabled\n"),
8389 ibfd, sec, rel->r_offset);
8390 ret = TRUE;
8391 goto err_free_rel;
8392 }
8393
8394 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8395 {
8396 struct plt_entry *ent;
8397 for (ent = htab->tls_get_addr->elf.plt.plist;
8398 ent != NULL;
8399 ent = ent->next)
8400 if (ent->addend == 0)
8401 {
8402 if (ent->plt.refcount > 0)
8403 {
8404 ent->plt.refcount -= 1;
8405 expecting_tls_get_addr = 0;
8406 }
8407 break;
8408 }
8409 }
8410
8411 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8412 {
8413 struct plt_entry *ent;
8414 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8415 ent != NULL;
8416 ent = ent->next)
8417 if (ent->addend == 0)
8418 {
8419 if (ent->plt.refcount > 0)
8420 ent->plt.refcount -= 1;
8421 break;
8422 }
8423 }
8424
8425 if (tls_clear == 0)
8426 continue;
8427
8428 if ((tls_set & TLS_EXPLICIT) == 0)
8429 {
8430 struct got_entry *ent;
8431
8432 /* Adjust got entry for this reloc. */
8433 if (h != NULL)
8434 ent = h->got.glist;
8435 else
8436 ent = elf_local_got_ents (ibfd)[r_symndx];
8437
8438 for (; ent != NULL; ent = ent->next)
8439 if (ent->addend == rel->r_addend
8440 && ent->owner == ibfd
8441 && ent->tls_type == tls_type)
8442 break;
8443 if (ent == NULL)
8444 abort ();
8445
8446 if (tls_set == 0)
8447 {
8448 /* We managed to get rid of a got entry. */
8449 if (ent->got.refcount > 0)
8450 ent->got.refcount -= 1;
8451 }
8452 }
8453 else
8454 {
8455 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8456 we'll lose one or two dyn relocs. */
8457 if (!dec_dynrel_count (rel->r_info, sec, info,
8458 NULL, h, sym))
8459 return FALSE;
8460
8461 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8462 {
8463 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8464 NULL, h, sym))
8465 return FALSE;
8466 }
8467 }
8468
8469 *tls_mask |= tls_set;
8470 *tls_mask &= ~tls_clear;
8471 }
8472
8473 if (elf_section_data (sec)->relocs != relstart)
8474 free (relstart);
8475 }
8476
8477 if (locsyms != NULL
8478 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8479 {
8480 if (!info->keep_memory)
8481 free (locsyms);
8482 else
8483 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8484 }
8485 }
8486
8487 if (toc_ref != NULL)
8488 free (toc_ref);
8489 return TRUE;
8490 }
8491
8492 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8493 the values of any global symbols in a toc section that has been
8494 edited. Globals in toc sections should be a rarity, so this function
8495 sets a flag if any are found in toc sections other than the one just
8496 edited, so that futher hash table traversals can be avoided. */
8497
8498 struct adjust_toc_info
8499 {
8500 asection *toc;
8501 unsigned long *skip;
8502 bfd_boolean global_toc_syms;
8503 };
8504
8505 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8506
8507 static bfd_boolean
8508 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8509 {
8510 struct ppc_link_hash_entry *eh;
8511 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8512 unsigned long i;
8513
8514 if (h->root.type != bfd_link_hash_defined
8515 && h->root.type != bfd_link_hash_defweak)
8516 return TRUE;
8517
8518 eh = (struct ppc_link_hash_entry *) h;
8519 if (eh->adjust_done)
8520 return TRUE;
8521
8522 if (eh->elf.root.u.def.section == toc_inf->toc)
8523 {
8524 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8525 i = toc_inf->toc->rawsize >> 3;
8526 else
8527 i = eh->elf.root.u.def.value >> 3;
8528
8529 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8530 {
8531 (*_bfd_error_handler)
8532 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8533 do
8534 ++i;
8535 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8536 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8537 }
8538
8539 eh->elf.root.u.def.value -= toc_inf->skip[i];
8540 eh->adjust_done = 1;
8541 }
8542 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8543 toc_inf->global_toc_syms = TRUE;
8544
8545 return TRUE;
8546 }
8547
8548 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8549
8550 static bfd_boolean
8551 ok_lo_toc_insn (unsigned int insn)
8552 {
8553 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8554 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8555 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8556 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8557 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8558 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8559 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8560 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8561 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8562 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8563 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8564 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8565 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8566 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8567 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8568 && (insn & 3) != 1)
8569 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8570 && ((insn & 3) == 0 || (insn & 3) == 3))
8571 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8572 }
8573
8574 /* Examine all relocs referencing .toc sections in order to remove
8575 unused .toc entries. */
8576
8577 bfd_boolean
8578 ppc64_elf_edit_toc (struct bfd_link_info *info)
8579 {
8580 bfd *ibfd;
8581 struct adjust_toc_info toc_inf;
8582 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8583
8584 htab->do_toc_opt = 1;
8585 toc_inf.global_toc_syms = TRUE;
8586 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8587 {
8588 asection *toc, *sec;
8589 Elf_Internal_Shdr *symtab_hdr;
8590 Elf_Internal_Sym *local_syms;
8591 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8592 unsigned long *skip, *drop;
8593 unsigned char *used;
8594 unsigned char *keep, last, some_unused;
8595
8596 if (!is_ppc64_elf (ibfd))
8597 continue;
8598
8599 toc = bfd_get_section_by_name (ibfd, ".toc");
8600 if (toc == NULL
8601 || toc->size == 0
8602 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8603 || discarded_section (toc))
8604 continue;
8605
8606 toc_relocs = NULL;
8607 local_syms = NULL;
8608 symtab_hdr = &elf_symtab_hdr (ibfd);
8609
8610 /* Look at sections dropped from the final link. */
8611 skip = NULL;
8612 relstart = NULL;
8613 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8614 {
8615 if (sec->reloc_count == 0
8616 || !discarded_section (sec)
8617 || get_opd_info (sec)
8618 || (sec->flags & SEC_ALLOC) == 0
8619 || (sec->flags & SEC_DEBUGGING) != 0)
8620 continue;
8621
8622 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8623 if (relstart == NULL)
8624 goto error_ret;
8625
8626 /* Run through the relocs to see which toc entries might be
8627 unused. */
8628 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8629 {
8630 enum elf_ppc64_reloc_type r_type;
8631 unsigned long r_symndx;
8632 asection *sym_sec;
8633 struct elf_link_hash_entry *h;
8634 Elf_Internal_Sym *sym;
8635 bfd_vma val;
8636
8637 r_type = ELF64_R_TYPE (rel->r_info);
8638 switch (r_type)
8639 {
8640 default:
8641 continue;
8642
8643 case R_PPC64_TOC16:
8644 case R_PPC64_TOC16_LO:
8645 case R_PPC64_TOC16_HI:
8646 case R_PPC64_TOC16_HA:
8647 case R_PPC64_TOC16_DS:
8648 case R_PPC64_TOC16_LO_DS:
8649 break;
8650 }
8651
8652 r_symndx = ELF64_R_SYM (rel->r_info);
8653 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8654 r_symndx, ibfd))
8655 goto error_ret;
8656
8657 if (sym_sec != toc)
8658 continue;
8659
8660 if (h != NULL)
8661 val = h->root.u.def.value;
8662 else
8663 val = sym->st_value;
8664 val += rel->r_addend;
8665
8666 if (val >= toc->size)
8667 continue;
8668
8669 /* Anything in the toc ought to be aligned to 8 bytes.
8670 If not, don't mark as unused. */
8671 if (val & 7)
8672 continue;
8673
8674 if (skip == NULL)
8675 {
8676 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8677 if (skip == NULL)
8678 goto error_ret;
8679 }
8680
8681 skip[val >> 3] = ref_from_discarded;
8682 }
8683
8684 if (elf_section_data (sec)->relocs != relstart)
8685 free (relstart);
8686 }
8687
8688 /* For largetoc loads of address constants, we can convert
8689 . addis rx,2,addr@got@ha
8690 . ld ry,addr@got@l(rx)
8691 to
8692 . addis rx,2,addr@toc@ha
8693 . addi ry,rx,addr@toc@l
8694 when addr is within 2G of the toc pointer. This then means
8695 that the word storing "addr" in the toc is no longer needed. */
8696
8697 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8698 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8699 && toc->reloc_count != 0)
8700 {
8701 /* Read toc relocs. */
8702 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8703 info->keep_memory);
8704 if (toc_relocs == NULL)
8705 goto error_ret;
8706
8707 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8708 {
8709 enum elf_ppc64_reloc_type r_type;
8710 unsigned long r_symndx;
8711 asection *sym_sec;
8712 struct elf_link_hash_entry *h;
8713 Elf_Internal_Sym *sym;
8714 bfd_vma val, addr;
8715
8716 r_type = ELF64_R_TYPE (rel->r_info);
8717 if (r_type != R_PPC64_ADDR64)
8718 continue;
8719
8720 r_symndx = ELF64_R_SYM (rel->r_info);
8721 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8722 r_symndx, ibfd))
8723 goto error_ret;
8724
8725 if (sym_sec == NULL
8726 || discarded_section (sym_sec))
8727 continue;
8728
8729 if (!SYMBOL_REFERENCES_LOCAL (info, h))
8730 continue;
8731
8732 if (h != NULL)
8733 {
8734 if (h->type == STT_GNU_IFUNC)
8735 continue;
8736 val = h->root.u.def.value;
8737 }
8738 else
8739 {
8740 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8741 continue;
8742 val = sym->st_value;
8743 }
8744 val += rel->r_addend;
8745 val += sym_sec->output_section->vma + sym_sec->output_offset;
8746
8747 /* We don't yet know the exact toc pointer value, but we
8748 know it will be somewhere in the toc section. Don't
8749 optimize if the difference from any possible toc
8750 pointer is outside [ff..f80008000, 7fff7fff]. */
8751 addr = toc->output_section->vma + TOC_BASE_OFF;
8752 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8753 continue;
8754
8755 addr = toc->output_section->vma + toc->output_section->rawsize;
8756 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8757 continue;
8758
8759 if (skip == NULL)
8760 {
8761 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8762 if (skip == NULL)
8763 goto error_ret;
8764 }
8765
8766 skip[rel->r_offset >> 3]
8767 |= can_optimize | ((rel - toc_relocs) << 2);
8768 }
8769 }
8770
8771 if (skip == NULL)
8772 continue;
8773
8774 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8775 if (used == NULL)
8776 {
8777 error_ret:
8778 if (local_syms != NULL
8779 && symtab_hdr->contents != (unsigned char *) local_syms)
8780 free (local_syms);
8781 if (sec != NULL
8782 && relstart != NULL
8783 && elf_section_data (sec)->relocs != relstart)
8784 free (relstart);
8785 if (toc_relocs != NULL
8786 && elf_section_data (toc)->relocs != toc_relocs)
8787 free (toc_relocs);
8788 if (skip != NULL)
8789 free (skip);
8790 return FALSE;
8791 }
8792
8793 /* Now check all kept sections that might reference the toc.
8794 Check the toc itself last. */
8795 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8796 : ibfd->sections);
8797 sec != NULL;
8798 sec = (sec == toc ? NULL
8799 : sec->next == NULL ? toc
8800 : sec->next == toc && toc->next ? toc->next
8801 : sec->next))
8802 {
8803 int repeat;
8804
8805 if (sec->reloc_count == 0
8806 || discarded_section (sec)
8807 || get_opd_info (sec)
8808 || (sec->flags & SEC_ALLOC) == 0
8809 || (sec->flags & SEC_DEBUGGING) != 0)
8810 continue;
8811
8812 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8813 info->keep_memory);
8814 if (relstart == NULL)
8815 {
8816 free (used);
8817 goto error_ret;
8818 }
8819
8820 /* Mark toc entries referenced as used. */
8821 do
8822 {
8823 repeat = 0;
8824 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8825 {
8826 enum elf_ppc64_reloc_type r_type;
8827 unsigned long r_symndx;
8828 asection *sym_sec;
8829 struct elf_link_hash_entry *h;
8830 Elf_Internal_Sym *sym;
8831 bfd_vma val;
8832 enum {no_check, check_lo, check_ha} insn_check;
8833
8834 r_type = ELF64_R_TYPE (rel->r_info);
8835 switch (r_type)
8836 {
8837 default:
8838 insn_check = no_check;
8839 break;
8840
8841 case R_PPC64_GOT_TLSLD16_HA:
8842 case R_PPC64_GOT_TLSGD16_HA:
8843 case R_PPC64_GOT_TPREL16_HA:
8844 case R_PPC64_GOT_DTPREL16_HA:
8845 case R_PPC64_GOT16_HA:
8846 case R_PPC64_TOC16_HA:
8847 insn_check = check_ha;
8848 break;
8849
8850 case R_PPC64_GOT_TLSLD16_LO:
8851 case R_PPC64_GOT_TLSGD16_LO:
8852 case R_PPC64_GOT_TPREL16_LO_DS:
8853 case R_PPC64_GOT_DTPREL16_LO_DS:
8854 case R_PPC64_GOT16_LO:
8855 case R_PPC64_GOT16_LO_DS:
8856 case R_PPC64_TOC16_LO:
8857 case R_PPC64_TOC16_LO_DS:
8858 insn_check = check_lo;
8859 break;
8860 }
8861
8862 if (insn_check != no_check)
8863 {
8864 bfd_vma off = rel->r_offset & ~3;
8865 unsigned char buf[4];
8866 unsigned int insn;
8867
8868 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8869 {
8870 free (used);
8871 goto error_ret;
8872 }
8873 insn = bfd_get_32 (ibfd, buf);
8874 if (insn_check == check_lo
8875 ? !ok_lo_toc_insn (insn)
8876 : ((insn & ((0x3f << 26) | 0x1f << 16))
8877 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8878 {
8879 char str[12];
8880
8881 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8882 sprintf (str, "%#08x", insn);
8883 info->callbacks->einfo
8884 (_("%P: %H: toc optimization is not supported for"
8885 " %s instruction.\n"),
8886 ibfd, sec, rel->r_offset & ~3, str);
8887 }
8888 }
8889
8890 switch (r_type)
8891 {
8892 case R_PPC64_TOC16:
8893 case R_PPC64_TOC16_LO:
8894 case R_PPC64_TOC16_HI:
8895 case R_PPC64_TOC16_HA:
8896 case R_PPC64_TOC16_DS:
8897 case R_PPC64_TOC16_LO_DS:
8898 /* In case we're taking addresses of toc entries. */
8899 case R_PPC64_ADDR64:
8900 break;
8901
8902 default:
8903 continue;
8904 }
8905
8906 r_symndx = ELF64_R_SYM (rel->r_info);
8907 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8908 r_symndx, ibfd))
8909 {
8910 free (used);
8911 goto error_ret;
8912 }
8913
8914 if (sym_sec != toc)
8915 continue;
8916
8917 if (h != NULL)
8918 val = h->root.u.def.value;
8919 else
8920 val = sym->st_value;
8921 val += rel->r_addend;
8922
8923 if (val >= toc->size)
8924 continue;
8925
8926 if ((skip[val >> 3] & can_optimize) != 0)
8927 {
8928 bfd_vma off;
8929 unsigned char opc;
8930
8931 switch (r_type)
8932 {
8933 case R_PPC64_TOC16_HA:
8934 break;
8935
8936 case R_PPC64_TOC16_LO_DS:
8937 off = rel->r_offset;
8938 off += (bfd_big_endian (ibfd) ? -2 : 3);
8939 if (!bfd_get_section_contents (ibfd, sec, &opc,
8940 off, 1))
8941 {
8942 free (used);
8943 goto error_ret;
8944 }
8945 if ((opc & (0x3f << 2)) == (58u << 2))
8946 break;
8947 /* Fall thru */
8948
8949 default:
8950 /* Wrong sort of reloc, or not a ld. We may
8951 as well clear ref_from_discarded too. */
8952 skip[val >> 3] = 0;
8953 }
8954 }
8955
8956 if (sec != toc)
8957 used[val >> 3] = 1;
8958 /* For the toc section, we only mark as used if this
8959 entry itself isn't unused. */
8960 else if ((used[rel->r_offset >> 3]
8961 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8962 && !used[val >> 3])
8963 {
8964 /* Do all the relocs again, to catch reference
8965 chains. */
8966 repeat = 1;
8967 used[val >> 3] = 1;
8968 }
8969 }
8970 }
8971 while (repeat);
8972
8973 if (elf_section_data (sec)->relocs != relstart)
8974 free (relstart);
8975 }
8976
8977 /* Merge the used and skip arrays. Assume that TOC
8978 doublewords not appearing as either used or unused belong
8979 to to an entry more than one doubleword in size. */
8980 for (drop = skip, keep = used, last = 0, some_unused = 0;
8981 drop < skip + (toc->size + 7) / 8;
8982 ++drop, ++keep)
8983 {
8984 if (*keep)
8985 {
8986 *drop &= ~ref_from_discarded;
8987 if ((*drop & can_optimize) != 0)
8988 some_unused = 1;
8989 last = 0;
8990 }
8991 else if ((*drop & ref_from_discarded) != 0)
8992 {
8993 some_unused = 1;
8994 last = ref_from_discarded;
8995 }
8996 else
8997 *drop = last;
8998 }
8999
9000 free (used);
9001
9002 if (some_unused)
9003 {
9004 bfd_byte *contents, *src;
9005 unsigned long off;
9006 Elf_Internal_Sym *sym;
9007 bfd_boolean local_toc_syms = FALSE;
9008
9009 /* Shuffle the toc contents, and at the same time convert the
9010 skip array from booleans into offsets. */
9011 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9012 goto error_ret;
9013
9014 elf_section_data (toc)->this_hdr.contents = contents;
9015
9016 for (src = contents, off = 0, drop = skip;
9017 src < contents + toc->size;
9018 src += 8, ++drop)
9019 {
9020 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9021 off += 8;
9022 else if (off != 0)
9023 {
9024 *drop = off;
9025 memcpy (src - off, src, 8);
9026 }
9027 }
9028 *drop = off;
9029 toc->rawsize = toc->size;
9030 toc->size = src - contents - off;
9031
9032 /* Adjust addends for relocs against the toc section sym,
9033 and optimize any accesses we can. */
9034 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9035 {
9036 if (sec->reloc_count == 0
9037 || discarded_section (sec))
9038 continue;
9039
9040 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9041 info->keep_memory);
9042 if (relstart == NULL)
9043 goto error_ret;
9044
9045 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9046 {
9047 enum elf_ppc64_reloc_type r_type;
9048 unsigned long r_symndx;
9049 asection *sym_sec;
9050 struct elf_link_hash_entry *h;
9051 bfd_vma val;
9052
9053 r_type = ELF64_R_TYPE (rel->r_info);
9054 switch (r_type)
9055 {
9056 default:
9057 continue;
9058
9059 case R_PPC64_TOC16:
9060 case R_PPC64_TOC16_LO:
9061 case R_PPC64_TOC16_HI:
9062 case R_PPC64_TOC16_HA:
9063 case R_PPC64_TOC16_DS:
9064 case R_PPC64_TOC16_LO_DS:
9065 case R_PPC64_ADDR64:
9066 break;
9067 }
9068
9069 r_symndx = ELF64_R_SYM (rel->r_info);
9070 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9071 r_symndx, ibfd))
9072 goto error_ret;
9073
9074 if (sym_sec != toc)
9075 continue;
9076
9077 if (h != NULL)
9078 val = h->root.u.def.value;
9079 else
9080 {
9081 val = sym->st_value;
9082 if (val != 0)
9083 local_toc_syms = TRUE;
9084 }
9085
9086 val += rel->r_addend;
9087
9088 if (val > toc->rawsize)
9089 val = toc->rawsize;
9090 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9091 continue;
9092 else if ((skip[val >> 3] & can_optimize) != 0)
9093 {
9094 Elf_Internal_Rela *tocrel
9095 = toc_relocs + (skip[val >> 3] >> 2);
9096 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9097
9098 switch (r_type)
9099 {
9100 case R_PPC64_TOC16_HA:
9101 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9102 break;
9103
9104 case R_PPC64_TOC16_LO_DS:
9105 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9106 break;
9107
9108 default:
9109 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9110 ppc_howto_init ();
9111 info->callbacks->einfo
9112 (_("%P: %H: %s references "
9113 "optimized away TOC entry\n"),
9114 ibfd, sec, rel->r_offset,
9115 ppc64_elf_howto_table[r_type]->name);
9116 bfd_set_error (bfd_error_bad_value);
9117 goto error_ret;
9118 }
9119 rel->r_addend = tocrel->r_addend;
9120 elf_section_data (sec)->relocs = relstart;
9121 continue;
9122 }
9123
9124 if (h != NULL || sym->st_value != 0)
9125 continue;
9126
9127 rel->r_addend -= skip[val >> 3];
9128 elf_section_data (sec)->relocs = relstart;
9129 }
9130
9131 if (elf_section_data (sec)->relocs != relstart)
9132 free (relstart);
9133 }
9134
9135 /* We shouldn't have local or global symbols defined in the TOC,
9136 but handle them anyway. */
9137 if (local_syms != NULL)
9138 for (sym = local_syms;
9139 sym < local_syms + symtab_hdr->sh_info;
9140 ++sym)
9141 if (sym->st_value != 0
9142 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9143 {
9144 unsigned long i;
9145
9146 if (sym->st_value > toc->rawsize)
9147 i = toc->rawsize >> 3;
9148 else
9149 i = sym->st_value >> 3;
9150
9151 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9152 {
9153 if (local_toc_syms)
9154 (*_bfd_error_handler)
9155 (_("%s defined on removed toc entry"),
9156 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9157 do
9158 ++i;
9159 while ((skip[i] & (ref_from_discarded | can_optimize)));
9160 sym->st_value = (bfd_vma) i << 3;
9161 }
9162
9163 sym->st_value -= skip[i];
9164 symtab_hdr->contents = (unsigned char *) local_syms;
9165 }
9166
9167 /* Adjust any global syms defined in this toc input section. */
9168 if (toc_inf.global_toc_syms)
9169 {
9170 toc_inf.toc = toc;
9171 toc_inf.skip = skip;
9172 toc_inf.global_toc_syms = FALSE;
9173 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9174 &toc_inf);
9175 }
9176
9177 if (toc->reloc_count != 0)
9178 {
9179 Elf_Internal_Shdr *rel_hdr;
9180 Elf_Internal_Rela *wrel;
9181 bfd_size_type sz;
9182
9183 /* Remove unused toc relocs, and adjust those we keep. */
9184 if (toc_relocs == NULL)
9185 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9186 info->keep_memory);
9187 if (toc_relocs == NULL)
9188 goto error_ret;
9189
9190 wrel = toc_relocs;
9191 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9192 if ((skip[rel->r_offset >> 3]
9193 & (ref_from_discarded | can_optimize)) == 0)
9194 {
9195 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9196 wrel->r_info = rel->r_info;
9197 wrel->r_addend = rel->r_addend;
9198 ++wrel;
9199 }
9200 else if (!dec_dynrel_count (rel->r_info, toc, info,
9201 &local_syms, NULL, NULL))
9202 goto error_ret;
9203
9204 elf_section_data (toc)->relocs = toc_relocs;
9205 toc->reloc_count = wrel - toc_relocs;
9206 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9207 sz = rel_hdr->sh_entsize;
9208 rel_hdr->sh_size = toc->reloc_count * sz;
9209 }
9210 }
9211 else if (toc_relocs != NULL
9212 && elf_section_data (toc)->relocs != toc_relocs)
9213 free (toc_relocs);
9214
9215 if (local_syms != NULL
9216 && symtab_hdr->contents != (unsigned char *) local_syms)
9217 {
9218 if (!info->keep_memory)
9219 free (local_syms);
9220 else
9221 symtab_hdr->contents = (unsigned char *) local_syms;
9222 }
9223 free (skip);
9224 }
9225
9226 return TRUE;
9227 }
9228
9229 /* Return true iff input section I references the TOC using
9230 instructions limited to +/-32k offsets. */
9231
9232 bfd_boolean
9233 ppc64_elf_has_small_toc_reloc (asection *i)
9234 {
9235 return (is_ppc64_elf (i->owner)
9236 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9237 }
9238
9239 /* Allocate space for one GOT entry. */
9240
9241 static void
9242 allocate_got (struct elf_link_hash_entry *h,
9243 struct bfd_link_info *info,
9244 struct got_entry *gent)
9245 {
9246 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9247 bfd_boolean dyn;
9248 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9249 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9250 ? 16 : 8);
9251 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9252 ? 2 : 1) * sizeof (Elf64_External_Rela);
9253 asection *got = ppc64_elf_tdata (gent->owner)->got;
9254
9255 gent->got.offset = got->size;
9256 got->size += entsize;
9257
9258 dyn = htab->elf.dynamic_sections_created;
9259 if (h->type == STT_GNU_IFUNC)
9260 {
9261 htab->elf.irelplt->size += rentsize;
9262 htab->got_reli_size += rentsize;
9263 }
9264 else if ((info->shared
9265 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9266 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9267 || h->root.type != bfd_link_hash_undefweak))
9268 {
9269 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9270 relgot->size += rentsize;
9271 }
9272 }
9273
9274 /* This function merges got entries in the same toc group. */
9275
9276 static void
9277 merge_got_entries (struct got_entry **pent)
9278 {
9279 struct got_entry *ent, *ent2;
9280
9281 for (ent = *pent; ent != NULL; ent = ent->next)
9282 if (!ent->is_indirect)
9283 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9284 if (!ent2->is_indirect
9285 && ent2->addend == ent->addend
9286 && ent2->tls_type == ent->tls_type
9287 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9288 {
9289 ent2->is_indirect = TRUE;
9290 ent2->got.ent = ent;
9291 }
9292 }
9293
9294 /* Allocate space in .plt, .got and associated reloc sections for
9295 dynamic relocs. */
9296
9297 static bfd_boolean
9298 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9299 {
9300 struct bfd_link_info *info;
9301 struct ppc_link_hash_table *htab;
9302 asection *s;
9303 struct ppc_link_hash_entry *eh;
9304 struct elf_dyn_relocs *p;
9305 struct got_entry **pgent, *gent;
9306
9307 if (h->root.type == bfd_link_hash_indirect)
9308 return TRUE;
9309
9310 info = (struct bfd_link_info *) inf;
9311 htab = ppc_hash_table (info);
9312 if (htab == NULL)
9313 return FALSE;
9314
9315 if ((htab->elf.dynamic_sections_created
9316 && h->dynindx != -1
9317 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
9318 || h->type == STT_GNU_IFUNC)
9319 {
9320 struct plt_entry *pent;
9321 bfd_boolean doneone = FALSE;
9322 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9323 if (pent->plt.refcount > 0)
9324 {
9325 if (!htab->elf.dynamic_sections_created
9326 || h->dynindx == -1)
9327 {
9328 s = htab->elf.iplt;
9329 pent->plt.offset = s->size;
9330 s->size += PLT_ENTRY_SIZE (htab);
9331 s = htab->elf.irelplt;
9332 }
9333 else
9334 {
9335 /* If this is the first .plt entry, make room for the special
9336 first entry. */
9337 s = htab->elf.splt;
9338 if (s->size == 0)
9339 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9340
9341 pent->plt.offset = s->size;
9342
9343 /* Make room for this entry. */
9344 s->size += PLT_ENTRY_SIZE (htab);
9345
9346 /* Make room for the .glink code. */
9347 s = htab->glink;
9348 if (s->size == 0)
9349 s->size += GLINK_CALL_STUB_SIZE;
9350 if (htab->opd_abi)
9351 {
9352 /* We need bigger stubs past index 32767. */
9353 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9354 s->size += 4;
9355 s->size += 2*4;
9356 }
9357 else
9358 s->size += 4;
9359
9360 /* We also need to make an entry in the .rela.plt section. */
9361 s = htab->elf.srelplt;
9362 }
9363 s->size += sizeof (Elf64_External_Rela);
9364 doneone = TRUE;
9365 }
9366 else
9367 pent->plt.offset = (bfd_vma) -1;
9368 if (!doneone)
9369 {
9370 h->plt.plist = NULL;
9371 h->needs_plt = 0;
9372 }
9373 }
9374 else
9375 {
9376 h->plt.plist = NULL;
9377 h->needs_plt = 0;
9378 }
9379
9380 eh = (struct ppc_link_hash_entry *) h;
9381 /* Run through the TLS GD got entries first if we're changing them
9382 to TPREL. */
9383 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9384 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9385 if (gent->got.refcount > 0
9386 && (gent->tls_type & TLS_GD) != 0)
9387 {
9388 /* This was a GD entry that has been converted to TPREL. If
9389 there happens to be a TPREL entry we can use that one. */
9390 struct got_entry *ent;
9391 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9392 if (ent->got.refcount > 0
9393 && (ent->tls_type & TLS_TPREL) != 0
9394 && ent->addend == gent->addend
9395 && ent->owner == gent->owner)
9396 {
9397 gent->got.refcount = 0;
9398 break;
9399 }
9400
9401 /* If not, then we'll be using our own TPREL entry. */
9402 if (gent->got.refcount != 0)
9403 gent->tls_type = TLS_TLS | TLS_TPREL;
9404 }
9405
9406 /* Remove any list entry that won't generate a word in the GOT before
9407 we call merge_got_entries. Otherwise we risk merging to empty
9408 entries. */
9409 pgent = &h->got.glist;
9410 while ((gent = *pgent) != NULL)
9411 if (gent->got.refcount > 0)
9412 {
9413 if ((gent->tls_type & TLS_LD) != 0
9414 && !h->def_dynamic)
9415 {
9416 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9417 *pgent = gent->next;
9418 }
9419 else
9420 pgent = &gent->next;
9421 }
9422 else
9423 *pgent = gent->next;
9424
9425 if (!htab->do_multi_toc)
9426 merge_got_entries (&h->got.glist);
9427
9428 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9429 if (!gent->is_indirect)
9430 {
9431 /* Make sure this symbol is output as a dynamic symbol.
9432 Undefined weak syms won't yet be marked as dynamic,
9433 nor will all TLS symbols. */
9434 if (h->dynindx == -1
9435 && !h->forced_local
9436 && h->type != STT_GNU_IFUNC
9437 && htab->elf.dynamic_sections_created)
9438 {
9439 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9440 return FALSE;
9441 }
9442
9443 if (!is_ppc64_elf (gent->owner))
9444 abort ();
9445
9446 allocate_got (h, info, gent);
9447 }
9448
9449 if (eh->dyn_relocs == NULL
9450 || (!htab->elf.dynamic_sections_created
9451 && h->type != STT_GNU_IFUNC))
9452 return TRUE;
9453
9454 /* In the shared -Bsymbolic case, discard space allocated for
9455 dynamic pc-relative relocs against symbols which turn out to be
9456 defined in regular objects. For the normal shared case, discard
9457 space for relocs that have become local due to symbol visibility
9458 changes. */
9459
9460 if (info->shared)
9461 {
9462 /* Relocs that use pc_count are those that appear on a call insn,
9463 or certain REL relocs (see must_be_dyn_reloc) that can be
9464 generated via assembly. We want calls to protected symbols to
9465 resolve directly to the function rather than going via the plt.
9466 If people want function pointer comparisons to work as expected
9467 then they should avoid writing weird assembly. */
9468 if (SYMBOL_CALLS_LOCAL (info, h))
9469 {
9470 struct elf_dyn_relocs **pp;
9471
9472 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9473 {
9474 p->count -= p->pc_count;
9475 p->pc_count = 0;
9476 if (p->count == 0)
9477 *pp = p->next;
9478 else
9479 pp = &p->next;
9480 }
9481 }
9482
9483 /* Also discard relocs on undefined weak syms with non-default
9484 visibility. */
9485 if (eh->dyn_relocs != NULL
9486 && h->root.type == bfd_link_hash_undefweak)
9487 {
9488 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9489 eh->dyn_relocs = NULL;
9490
9491 /* Make sure this symbol is output as a dynamic symbol.
9492 Undefined weak syms won't yet be marked as dynamic. */
9493 else if (h->dynindx == -1
9494 && !h->forced_local)
9495 {
9496 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9497 return FALSE;
9498 }
9499 }
9500 }
9501 else if (h->type == STT_GNU_IFUNC)
9502 {
9503 if (!h->non_got_ref)
9504 eh->dyn_relocs = NULL;
9505 }
9506 else if (ELIMINATE_COPY_RELOCS)
9507 {
9508 /* For the non-shared case, discard space for relocs against
9509 symbols which turn out to need copy relocs or are not
9510 dynamic. */
9511
9512 if (!h->non_got_ref
9513 && !h->def_regular)
9514 {
9515 /* Make sure this symbol is output as a dynamic symbol.
9516 Undefined weak syms won't yet be marked as dynamic. */
9517 if (h->dynindx == -1
9518 && !h->forced_local)
9519 {
9520 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9521 return FALSE;
9522 }
9523
9524 /* If that succeeded, we know we'll be keeping all the
9525 relocs. */
9526 if (h->dynindx != -1)
9527 goto keep;
9528 }
9529
9530 eh->dyn_relocs = NULL;
9531
9532 keep: ;
9533 }
9534
9535 /* Finally, allocate space. */
9536 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9537 {
9538 asection *sreloc = elf_section_data (p->sec)->sreloc;
9539 if (eh->elf.type == STT_GNU_IFUNC)
9540 sreloc = htab->elf.irelplt;
9541 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9542 }
9543
9544 return TRUE;
9545 }
9546
9547 /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9548 to set up space for global entry stubs. These are put in glink,
9549 after the branch table. */
9550
9551 static bfd_boolean
9552 size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9553 {
9554 struct bfd_link_info *info;
9555 struct ppc_link_hash_table *htab;
9556 struct plt_entry *pent;
9557 asection *s;
9558
9559 if (h->root.type == bfd_link_hash_indirect)
9560 return TRUE;
9561
9562 if (!h->pointer_equality_needed)
9563 return TRUE;
9564
9565 if (h->def_regular)
9566 return TRUE;
9567
9568 info = inf;
9569 htab = ppc_hash_table (info);
9570 if (htab == NULL)
9571 return FALSE;
9572
9573 s = htab->glink;
9574 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9575 if (pent->plt.offset != (bfd_vma) -1
9576 && pent->addend == 0)
9577 {
9578 /* For ELFv2, if this symbol is not defined in a regular file
9579 and we are not generating a shared library or pie, then we
9580 need to define the symbol in the executable on a call stub.
9581 This is to avoid text relocations. */
9582 s->size = (s->size + 15) & -16;
9583 h->root.u.def.section = s;
9584 h->root.u.def.value = s->size;
9585 s->size += 16;
9586 break;
9587 }
9588 return TRUE;
9589 }
9590
9591 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
9592 read-only sections. */
9593
9594 static bfd_boolean
9595 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9596 {
9597 if (h->root.type == bfd_link_hash_indirect)
9598 return TRUE;
9599
9600 if (readonly_dynrelocs (h))
9601 {
9602 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9603
9604 /* Not an error, just cut short the traversal. */
9605 return FALSE;
9606 }
9607 return TRUE;
9608 }
9609
9610 /* Set the sizes of the dynamic sections. */
9611
9612 static bfd_boolean
9613 ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9614 struct bfd_link_info *info)
9615 {
9616 struct ppc_link_hash_table *htab;
9617 bfd *dynobj;
9618 asection *s;
9619 bfd_boolean relocs;
9620 bfd *ibfd;
9621 struct got_entry *first_tlsld;
9622
9623 htab = ppc_hash_table (info);
9624 if (htab == NULL)
9625 return FALSE;
9626
9627 dynobj = htab->elf.dynobj;
9628 if (dynobj == NULL)
9629 abort ();
9630
9631 if (htab->elf.dynamic_sections_created)
9632 {
9633 /* Set the contents of the .interp section to the interpreter. */
9634 if (info->executable)
9635 {
9636 s = bfd_get_linker_section (dynobj, ".interp");
9637 if (s == NULL)
9638 abort ();
9639 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9640 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9641 }
9642 }
9643
9644 /* Set up .got offsets for local syms, and space for local dynamic
9645 relocs. */
9646 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9647 {
9648 struct got_entry **lgot_ents;
9649 struct got_entry **end_lgot_ents;
9650 struct plt_entry **local_plt;
9651 struct plt_entry **end_local_plt;
9652 unsigned char *lgot_masks;
9653 bfd_size_type locsymcount;
9654 Elf_Internal_Shdr *symtab_hdr;
9655
9656 if (!is_ppc64_elf (ibfd))
9657 continue;
9658
9659 for (s = ibfd->sections; s != NULL; s = s->next)
9660 {
9661 struct ppc_dyn_relocs *p;
9662
9663 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9664 {
9665 if (!bfd_is_abs_section (p->sec)
9666 && bfd_is_abs_section (p->sec->output_section))
9667 {
9668 /* Input section has been discarded, either because
9669 it is a copy of a linkonce section or due to
9670 linker script /DISCARD/, so we'll be discarding
9671 the relocs too. */
9672 }
9673 else if (p->count != 0)
9674 {
9675 asection *srel = elf_section_data (p->sec)->sreloc;
9676 if (p->ifunc)
9677 srel = htab->elf.irelplt;
9678 srel->size += p->count * sizeof (Elf64_External_Rela);
9679 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9680 info->flags |= DF_TEXTREL;
9681 }
9682 }
9683 }
9684
9685 lgot_ents = elf_local_got_ents (ibfd);
9686 if (!lgot_ents)
9687 continue;
9688
9689 symtab_hdr = &elf_symtab_hdr (ibfd);
9690 locsymcount = symtab_hdr->sh_info;
9691 end_lgot_ents = lgot_ents + locsymcount;
9692 local_plt = (struct plt_entry **) end_lgot_ents;
9693 end_local_plt = local_plt + locsymcount;
9694 lgot_masks = (unsigned char *) end_local_plt;
9695 s = ppc64_elf_tdata (ibfd)->got;
9696 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9697 {
9698 struct got_entry **pent, *ent;
9699
9700 pent = lgot_ents;
9701 while ((ent = *pent) != NULL)
9702 if (ent->got.refcount > 0)
9703 {
9704 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9705 {
9706 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9707 *pent = ent->next;
9708 }
9709 else
9710 {
9711 unsigned int ent_size = 8;
9712 unsigned int rel_size = sizeof (Elf64_External_Rela);
9713
9714 ent->got.offset = s->size;
9715 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9716 {
9717 ent_size *= 2;
9718 rel_size *= 2;
9719 }
9720 s->size += ent_size;
9721 if ((*lgot_masks & PLT_IFUNC) != 0)
9722 {
9723 htab->elf.irelplt->size += rel_size;
9724 htab->got_reli_size += rel_size;
9725 }
9726 else if (info->shared)
9727 {
9728 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9729 srel->size += rel_size;
9730 }
9731 pent = &ent->next;
9732 }
9733 }
9734 else
9735 *pent = ent->next;
9736 }
9737
9738 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9739 for (; local_plt < end_local_plt; ++local_plt)
9740 {
9741 struct plt_entry *ent;
9742
9743 for (ent = *local_plt; ent != NULL; ent = ent->next)
9744 if (ent->plt.refcount > 0)
9745 {
9746 s = htab->elf.iplt;
9747 ent->plt.offset = s->size;
9748 s->size += PLT_ENTRY_SIZE (htab);
9749
9750 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
9751 }
9752 else
9753 ent->plt.offset = (bfd_vma) -1;
9754 }
9755 }
9756
9757 /* Allocate global sym .plt and .got entries, and space for global
9758 sym dynamic relocs. */
9759 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9760 /* Stash the end of glink branch table. */
9761 if (htab->glink != NULL)
9762 htab->glink->rawsize = htab->glink->size;
9763
9764 if (!htab->opd_abi && !info->shared)
9765 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
9766
9767 first_tlsld = NULL;
9768 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9769 {
9770 struct got_entry *ent;
9771
9772 if (!is_ppc64_elf (ibfd))
9773 continue;
9774
9775 ent = ppc64_tlsld_got (ibfd);
9776 if (ent->got.refcount > 0)
9777 {
9778 if (!htab->do_multi_toc && first_tlsld != NULL)
9779 {
9780 ent->is_indirect = TRUE;
9781 ent->got.ent = first_tlsld;
9782 }
9783 else
9784 {
9785 if (first_tlsld == NULL)
9786 first_tlsld = ent;
9787 s = ppc64_elf_tdata (ibfd)->got;
9788 ent->got.offset = s->size;
9789 ent->owner = ibfd;
9790 s->size += 16;
9791 if (info->shared)
9792 {
9793 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9794 srel->size += sizeof (Elf64_External_Rela);
9795 }
9796 }
9797 }
9798 else
9799 ent->got.offset = (bfd_vma) -1;
9800 }
9801
9802 /* We now have determined the sizes of the various dynamic sections.
9803 Allocate memory for them. */
9804 relocs = FALSE;
9805 for (s = dynobj->sections; s != NULL; s = s->next)
9806 {
9807 if ((s->flags & SEC_LINKER_CREATED) == 0)
9808 continue;
9809
9810 if (s == htab->brlt || s == htab->relbrlt)
9811 /* These haven't been allocated yet; don't strip. */
9812 continue;
9813 else if (s == htab->elf.sgot
9814 || s == htab->elf.splt
9815 || s == htab->elf.iplt
9816 || s == htab->glink
9817 || s == htab->dynbss)
9818 {
9819 /* Strip this section if we don't need it; see the
9820 comment below. */
9821 }
9822 else if (s == htab->glink_eh_frame)
9823 {
9824 if (!bfd_is_abs_section (s->output_section))
9825 /* Not sized yet. */
9826 continue;
9827 }
9828 else if (CONST_STRNEQ (s->name, ".rela"))
9829 {
9830 if (s->size != 0)
9831 {
9832 if (s != htab->elf.srelplt)
9833 relocs = TRUE;
9834
9835 /* We use the reloc_count field as a counter if we need
9836 to copy relocs into the output file. */
9837 s->reloc_count = 0;
9838 }
9839 }
9840 else
9841 {
9842 /* It's not one of our sections, so don't allocate space. */
9843 continue;
9844 }
9845
9846 if (s->size == 0)
9847 {
9848 /* If we don't need this section, strip it from the
9849 output file. This is mostly to handle .rela.bss and
9850 .rela.plt. We must create both sections in
9851 create_dynamic_sections, because they must be created
9852 before the linker maps input sections to output
9853 sections. The linker does that before
9854 adjust_dynamic_symbol is called, and it is that
9855 function which decides whether anything needs to go
9856 into these sections. */
9857 s->flags |= SEC_EXCLUDE;
9858 continue;
9859 }
9860
9861 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9862 continue;
9863
9864 /* Allocate memory for the section contents. We use bfd_zalloc
9865 here in case unused entries are not reclaimed before the
9866 section's contents are written out. This should not happen,
9867 but this way if it does we get a R_PPC64_NONE reloc in .rela
9868 sections instead of garbage.
9869 We also rely on the section contents being zero when writing
9870 the GOT. */
9871 s->contents = bfd_zalloc (dynobj, s->size);
9872 if (s->contents == NULL)
9873 return FALSE;
9874 }
9875
9876 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9877 {
9878 if (!is_ppc64_elf (ibfd))
9879 continue;
9880
9881 s = ppc64_elf_tdata (ibfd)->got;
9882 if (s != NULL && s != htab->elf.sgot)
9883 {
9884 if (s->size == 0)
9885 s->flags |= SEC_EXCLUDE;
9886 else
9887 {
9888 s->contents = bfd_zalloc (ibfd, s->size);
9889 if (s->contents == NULL)
9890 return FALSE;
9891 }
9892 }
9893 s = ppc64_elf_tdata (ibfd)->relgot;
9894 if (s != NULL)
9895 {
9896 if (s->size == 0)
9897 s->flags |= SEC_EXCLUDE;
9898 else
9899 {
9900 s->contents = bfd_zalloc (ibfd, s->size);
9901 if (s->contents == NULL)
9902 return FALSE;
9903 relocs = TRUE;
9904 s->reloc_count = 0;
9905 }
9906 }
9907 }
9908
9909 if (htab->elf.dynamic_sections_created)
9910 {
9911 bfd_boolean tls_opt;
9912
9913 /* Add some entries to the .dynamic section. We fill in the
9914 values later, in ppc64_elf_finish_dynamic_sections, but we
9915 must add the entries now so that we get the correct size for
9916 the .dynamic section. The DT_DEBUG entry is filled in by the
9917 dynamic linker and used by the debugger. */
9918 #define add_dynamic_entry(TAG, VAL) \
9919 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9920
9921 if (info->executable)
9922 {
9923 if (!add_dynamic_entry (DT_DEBUG, 0))
9924 return FALSE;
9925 }
9926
9927 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
9928 {
9929 if (!add_dynamic_entry (DT_PLTGOT, 0)
9930 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9931 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9932 || !add_dynamic_entry (DT_JMPREL, 0)
9933 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9934 return FALSE;
9935 }
9936
9937 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
9938 {
9939 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9940 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9941 return FALSE;
9942 }
9943
9944 tls_opt = (!htab->params->no_tls_get_addr_opt
9945 && htab->tls_get_addr_fd != NULL
9946 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
9947 if (tls_opt || !htab->opd_abi)
9948 {
9949 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
9950 return FALSE;
9951 }
9952
9953 if (relocs)
9954 {
9955 if (!add_dynamic_entry (DT_RELA, 0)
9956 || !add_dynamic_entry (DT_RELASZ, 0)
9957 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9958 return FALSE;
9959
9960 /* If any dynamic relocs apply to a read-only section,
9961 then we need a DT_TEXTREL entry. */
9962 if ((info->flags & DF_TEXTREL) == 0)
9963 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
9964
9965 if ((info->flags & DF_TEXTREL) != 0)
9966 {
9967 if (!add_dynamic_entry (DT_TEXTREL, 0))
9968 return FALSE;
9969 }
9970 }
9971 }
9972 #undef add_dynamic_entry
9973
9974 return TRUE;
9975 }
9976
9977 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
9978
9979 static bfd_boolean
9980 ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
9981 {
9982 if (h->plt.plist != NULL
9983 && !h->def_regular
9984 && !h->pointer_equality_needed)
9985 return FALSE;
9986
9987 return _bfd_elf_hash_symbol (h);
9988 }
9989
9990 /* Determine the type of stub needed, if any, for a call. */
9991
9992 static inline enum ppc_stub_type
9993 ppc_type_of_stub (asection *input_sec,
9994 const Elf_Internal_Rela *rel,
9995 struct ppc_link_hash_entry **hash,
9996 struct plt_entry **plt_ent,
9997 bfd_vma destination,
9998 unsigned long local_off)
9999 {
10000 struct ppc_link_hash_entry *h = *hash;
10001 bfd_vma location;
10002 bfd_vma branch_offset;
10003 bfd_vma max_branch_offset;
10004 enum elf_ppc64_reloc_type r_type;
10005
10006 if (h != NULL)
10007 {
10008 struct plt_entry *ent;
10009 struct ppc_link_hash_entry *fdh = h;
10010 if (h->oh != NULL
10011 && h->oh->is_func_descriptor)
10012 {
10013 fdh = ppc_follow_link (h->oh);
10014 *hash = fdh;
10015 }
10016
10017 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10018 if (ent->addend == rel->r_addend
10019 && ent->plt.offset != (bfd_vma) -1)
10020 {
10021 *plt_ent = ent;
10022 return ppc_stub_plt_call;
10023 }
10024
10025 /* Here, we know we don't have a plt entry. If we don't have a
10026 either a defined function descriptor or a defined entry symbol
10027 in a regular object file, then it is pointless trying to make
10028 any other type of stub. */
10029 if (!is_static_defined (&fdh->elf)
10030 && !is_static_defined (&h->elf))
10031 return ppc_stub_none;
10032 }
10033 else if (elf_local_got_ents (input_sec->owner) != NULL)
10034 {
10035 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10036 struct plt_entry **local_plt = (struct plt_entry **)
10037 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10038 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10039
10040 if (local_plt[r_symndx] != NULL)
10041 {
10042 struct plt_entry *ent;
10043
10044 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10045 if (ent->addend == rel->r_addend
10046 && ent->plt.offset != (bfd_vma) -1)
10047 {
10048 *plt_ent = ent;
10049 return ppc_stub_plt_call;
10050 }
10051 }
10052 }
10053
10054 /* Determine where the call point is. */
10055 location = (input_sec->output_offset
10056 + input_sec->output_section->vma
10057 + rel->r_offset);
10058
10059 branch_offset = destination - location;
10060 r_type = ELF64_R_TYPE (rel->r_info);
10061
10062 /* Determine if a long branch stub is needed. */
10063 max_branch_offset = 1 << 25;
10064 if (r_type != R_PPC64_REL24)
10065 max_branch_offset = 1 << 15;
10066
10067 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10068 /* We need a stub. Figure out whether a long_branch or plt_branch
10069 is needed later. */
10070 return ppc_stub_long_branch;
10071
10072 return ppc_stub_none;
10073 }
10074
10075 /* With power7 weakly ordered memory model, it is possible for ld.so
10076 to update a plt entry in one thread and have another thread see a
10077 stale zero toc entry. To avoid this we need some sort of acquire
10078 barrier in the call stub. One solution is to make the load of the
10079 toc word seem to appear to depend on the load of the function entry
10080 word. Another solution is to test for r2 being zero, and branch to
10081 the appropriate glink entry if so.
10082
10083 . fake dep barrier compare
10084 . ld 12,xxx(2) ld 12,xxx(2)
10085 . mtctr 12 mtctr 12
10086 . xor 11,12,12 ld 2,xxx+8(2)
10087 . add 2,2,11 cmpldi 2,0
10088 . ld 2,xxx+8(2) bnectr+
10089 . bctr b <glink_entry>
10090
10091 The solution involving the compare turns out to be faster, so
10092 that's what we use unless the branch won't reach. */
10093
10094 #define ALWAYS_USE_FAKE_DEP 0
10095 #define ALWAYS_EMIT_R2SAVE 0
10096
10097 #define PPC_LO(v) ((v) & 0xffff)
10098 #define PPC_HI(v) (((v) >> 16) & 0xffff)
10099 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
10100
10101 static inline unsigned int
10102 plt_stub_size (struct ppc_link_hash_table *htab,
10103 struct ppc_stub_hash_entry *stub_entry,
10104 bfd_vma off)
10105 {
10106 unsigned size = 12;
10107
10108 if (ALWAYS_EMIT_R2SAVE
10109 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10110 size += 4;
10111 if (PPC_HA (off) != 0)
10112 size += 4;
10113 if (htab->opd_abi)
10114 {
10115 size += 4;
10116 if (htab->params->plt_static_chain)
10117 size += 4;
10118 if (htab->params->plt_thread_safe)
10119 size += 8;
10120 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10121 size += 4;
10122 }
10123 if (stub_entry->h != NULL
10124 && (stub_entry->h == htab->tls_get_addr_fd
10125 || stub_entry->h == htab->tls_get_addr)
10126 && !htab->params->no_tls_get_addr_opt)
10127 size += 13 * 4;
10128 return size;
10129 }
10130
10131 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10132 then return the padding needed to do so. */
10133 static inline unsigned int
10134 plt_stub_pad (struct ppc_link_hash_table *htab,
10135 struct ppc_stub_hash_entry *stub_entry,
10136 bfd_vma plt_off)
10137 {
10138 int stub_align = 1 << htab->params->plt_stub_align;
10139 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10140 bfd_vma stub_off = stub_entry->stub_sec->size;
10141
10142 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10143 > (stub_size & -stub_align))
10144 return stub_align - (stub_off & (stub_align - 1));
10145 return 0;
10146 }
10147
10148 /* Build a .plt call stub. */
10149
10150 static inline bfd_byte *
10151 build_plt_stub (struct ppc_link_hash_table *htab,
10152 struct ppc_stub_hash_entry *stub_entry,
10153 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10154 {
10155 bfd *obfd = htab->params->stub_bfd;
10156 bfd_boolean plt_load_toc = htab->opd_abi;
10157 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10158 bfd_boolean plt_thread_safe = htab->params->plt_thread_safe;
10159 bfd_boolean use_fake_dep = plt_thread_safe;
10160 bfd_vma cmp_branch_off = 0;
10161
10162 if (!ALWAYS_USE_FAKE_DEP
10163 && plt_load_toc
10164 && plt_thread_safe
10165 && !(stub_entry->h != NULL
10166 && (stub_entry->h == htab->tls_get_addr_fd
10167 || stub_entry->h == htab->tls_get_addr)
10168 && !htab->params->no_tls_get_addr_opt))
10169 {
10170 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10171 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10172 / PLT_ENTRY_SIZE (htab));
10173 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10174 bfd_vma to, from;
10175
10176 if (pltindex > 32768)
10177 glinkoff += (pltindex - 32768) * 4;
10178 to = (glinkoff
10179 + htab->glink->output_offset
10180 + htab->glink->output_section->vma);
10181 from = (p - stub_entry->stub_sec->contents
10182 + 4 * (ALWAYS_EMIT_R2SAVE
10183 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10184 + 4 * (PPC_HA (offset) != 0)
10185 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10186 != PPC_HA (offset))
10187 + 4 * (plt_static_chain != 0)
10188 + 20
10189 + stub_entry->stub_sec->output_offset
10190 + stub_entry->stub_sec->output_section->vma);
10191 cmp_branch_off = to - from;
10192 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10193 }
10194
10195 if (PPC_HA (offset) != 0)
10196 {
10197 if (r != NULL)
10198 {
10199 if (ALWAYS_EMIT_R2SAVE
10200 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10201 r[0].r_offset += 4;
10202 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10203 r[1].r_offset = r[0].r_offset + 4;
10204 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10205 r[1].r_addend = r[0].r_addend;
10206 if (plt_load_toc)
10207 {
10208 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10209 {
10210 r[2].r_offset = r[1].r_offset + 4;
10211 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10212 r[2].r_addend = r[0].r_addend;
10213 }
10214 else
10215 {
10216 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10217 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10218 r[2].r_addend = r[0].r_addend + 8;
10219 if (plt_static_chain)
10220 {
10221 r[3].r_offset = r[2].r_offset + 4;
10222 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10223 r[3].r_addend = r[0].r_addend + 16;
10224 }
10225 }
10226 }
10227 }
10228 if (ALWAYS_EMIT_R2SAVE
10229 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10230 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10231 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10232 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10233 if (plt_load_toc
10234 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10235 {
10236 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10237 offset = 0;
10238 }
10239 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10240 if (plt_load_toc)
10241 {
10242 if (use_fake_dep)
10243 {
10244 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10245 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10246 }
10247 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10248 if (plt_static_chain)
10249 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10250 }
10251 }
10252 else
10253 {
10254 if (r != NULL)
10255 {
10256 if (ALWAYS_EMIT_R2SAVE
10257 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10258 r[0].r_offset += 4;
10259 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10260 if (plt_load_toc)
10261 {
10262 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10263 {
10264 r[1].r_offset = r[0].r_offset + 4;
10265 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10266 r[1].r_addend = r[0].r_addend;
10267 }
10268 else
10269 {
10270 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10271 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10272 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10273 if (plt_static_chain)
10274 {
10275 r[2].r_offset = r[1].r_offset + 4;
10276 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10277 r[2].r_addend = r[0].r_addend + 8;
10278 }
10279 }
10280 }
10281 }
10282 if (ALWAYS_EMIT_R2SAVE
10283 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10284 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10285 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10286 if (plt_load_toc
10287 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10288 {
10289 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10290 offset = 0;
10291 }
10292 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10293 if (plt_load_toc)
10294 {
10295 if (use_fake_dep)
10296 {
10297 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10298 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10299 }
10300 if (plt_static_chain)
10301 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10302 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10303 }
10304 }
10305 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10306 {
10307 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10308 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10309 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10310 }
10311 else
10312 bfd_put_32 (obfd, BCTR, p), p += 4;
10313 return p;
10314 }
10315
10316 /* Build a special .plt call stub for __tls_get_addr. */
10317
10318 #define LD_R11_0R3 0xe9630000
10319 #define LD_R12_0R3 0xe9830000
10320 #define MR_R0_R3 0x7c601b78
10321 #define CMPDI_R11_0 0x2c2b0000
10322 #define ADD_R3_R12_R13 0x7c6c6a14
10323 #define BEQLR 0x4d820020
10324 #define MR_R3_R0 0x7c030378
10325 #define STD_R11_0R1 0xf9610000
10326 #define BCTRL 0x4e800421
10327 #define LD_R11_0R1 0xe9610000
10328 #define MTLR_R11 0x7d6803a6
10329
10330 static inline bfd_byte *
10331 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10332 struct ppc_stub_hash_entry *stub_entry,
10333 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10334 {
10335 bfd *obfd = htab->params->stub_bfd;
10336
10337 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10338 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10339 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10340 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10341 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10342 bfd_put_32 (obfd, BEQLR, p), p += 4;
10343 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10344 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10345 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10346
10347 if (r != NULL)
10348 r[0].r_offset += 9 * 4;
10349 p = build_plt_stub (htab, stub_entry, p, offset, r);
10350 bfd_put_32 (obfd, BCTRL, p - 4);
10351
10352 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10353 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10354 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10355 bfd_put_32 (obfd, BLR, p), p += 4;
10356
10357 return p;
10358 }
10359
10360 static Elf_Internal_Rela *
10361 get_relocs (asection *sec, int count)
10362 {
10363 Elf_Internal_Rela *relocs;
10364 struct bfd_elf_section_data *elfsec_data;
10365
10366 elfsec_data = elf_section_data (sec);
10367 relocs = elfsec_data->relocs;
10368 if (relocs == NULL)
10369 {
10370 bfd_size_type relsize;
10371 relsize = sec->reloc_count * sizeof (*relocs);
10372 relocs = bfd_alloc (sec->owner, relsize);
10373 if (relocs == NULL)
10374 return NULL;
10375 elfsec_data->relocs = relocs;
10376 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10377 sizeof (Elf_Internal_Shdr));
10378 if (elfsec_data->rela.hdr == NULL)
10379 return NULL;
10380 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10381 * sizeof (Elf64_External_Rela));
10382 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10383 sec->reloc_count = 0;
10384 }
10385 relocs += sec->reloc_count;
10386 sec->reloc_count += count;
10387 return relocs;
10388 }
10389
10390 static bfd_vma
10391 get_r2off (struct bfd_link_info *info,
10392 struct ppc_stub_hash_entry *stub_entry)
10393 {
10394 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10395 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
10396
10397 if (r2off == 0)
10398 {
10399 /* Support linking -R objects. Get the toc pointer from the
10400 opd entry. */
10401 char buf[8];
10402 if (!htab->opd_abi)
10403 return r2off;
10404 asection *opd = stub_entry->h->elf.root.u.def.section;
10405 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10406
10407 if (strcmp (opd->name, ".opd") != 0
10408 || opd->reloc_count != 0)
10409 {
10410 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10411 stub_entry->h->elf.root.root.string);
10412 bfd_set_error (bfd_error_bad_value);
10413 return 0;
10414 }
10415 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10416 return 0;
10417 r2off = bfd_get_64 (opd->owner, buf);
10418 r2off -= elf_gp (info->output_bfd);
10419 }
10420 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
10421 return r2off;
10422 }
10423
10424 static bfd_boolean
10425 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10426 {
10427 struct ppc_stub_hash_entry *stub_entry;
10428 struct ppc_branch_hash_entry *br_entry;
10429 struct bfd_link_info *info;
10430 struct ppc_link_hash_table *htab;
10431 bfd_byte *loc;
10432 bfd_byte *p;
10433 bfd_vma dest, off;
10434 int size;
10435 Elf_Internal_Rela *r;
10436 asection *plt;
10437
10438 /* Massage our args to the form they really have. */
10439 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10440 info = in_arg;
10441
10442 htab = ppc_hash_table (info);
10443 if (htab == NULL)
10444 return FALSE;
10445
10446 /* Make a note of the offset within the stubs for this entry. */
10447 stub_entry->stub_offset = stub_entry->stub_sec->size;
10448 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10449
10450 htab->stub_count[stub_entry->stub_type - 1] += 1;
10451 switch (stub_entry->stub_type)
10452 {
10453 case ppc_stub_long_branch:
10454 case ppc_stub_long_branch_r2off:
10455 /* Branches are relative. This is where we are going to. */
10456 dest = (stub_entry->target_value
10457 + stub_entry->target_section->output_offset
10458 + stub_entry->target_section->output_section->vma);
10459 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10460 off = dest;
10461
10462 /* And this is where we are coming from. */
10463 off -= (stub_entry->stub_offset
10464 + stub_entry->stub_sec->output_offset
10465 + stub_entry->stub_sec->output_section->vma);
10466
10467 size = 4;
10468 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10469 {
10470 bfd_vma r2off = get_r2off (info, stub_entry);
10471
10472 if (r2off == 0)
10473 {
10474 htab->stub_error = TRUE;
10475 return FALSE;
10476 }
10477 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10478 loc += 4;
10479 size = 12;
10480 if (PPC_HA (r2off) != 0)
10481 {
10482 size = 16;
10483 bfd_put_32 (htab->params->stub_bfd,
10484 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10485 loc += 4;
10486 }
10487 bfd_put_32 (htab->params->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10488 loc += 4;
10489 off -= size - 4;
10490 }
10491 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10492
10493 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10494 {
10495 info->callbacks->einfo
10496 (_("%P: long branch stub `%s' offset overflow\n"),
10497 stub_entry->root.string);
10498 htab->stub_error = TRUE;
10499 return FALSE;
10500 }
10501
10502 if (info->emitrelocations)
10503 {
10504 r = get_relocs (stub_entry->stub_sec, 1);
10505 if (r == NULL)
10506 return FALSE;
10507 r->r_offset = loc - stub_entry->stub_sec->contents;
10508 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10509 r->r_addend = dest;
10510 if (stub_entry->h != NULL)
10511 {
10512 struct elf_link_hash_entry **hashes;
10513 unsigned long symndx;
10514 struct ppc_link_hash_entry *h;
10515
10516 hashes = elf_sym_hashes (htab->params->stub_bfd);
10517 if (hashes == NULL)
10518 {
10519 bfd_size_type hsize;
10520
10521 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10522 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10523 if (hashes == NULL)
10524 return FALSE;
10525 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10526 htab->stub_globals = 1;
10527 }
10528 symndx = htab->stub_globals++;
10529 h = stub_entry->h;
10530 hashes[symndx] = &h->elf;
10531 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10532 if (h->oh != NULL && h->oh->is_func)
10533 h = ppc_follow_link (h->oh);
10534 if (h->elf.root.u.def.section != stub_entry->target_section)
10535 /* H is an opd symbol. The addend must be zero. */
10536 r->r_addend = 0;
10537 else
10538 {
10539 off = (h->elf.root.u.def.value
10540 + h->elf.root.u.def.section->output_offset
10541 + h->elf.root.u.def.section->output_section->vma);
10542 r->r_addend -= off;
10543 }
10544 }
10545 }
10546 break;
10547
10548 case ppc_stub_plt_branch:
10549 case ppc_stub_plt_branch_r2off:
10550 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10551 stub_entry->root.string + 9,
10552 FALSE, FALSE);
10553 if (br_entry == NULL)
10554 {
10555 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10556 stub_entry->root.string);
10557 htab->stub_error = TRUE;
10558 return FALSE;
10559 }
10560
10561 dest = (stub_entry->target_value
10562 + stub_entry->target_section->output_offset
10563 + stub_entry->target_section->output_section->vma);
10564 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10565 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10566
10567 bfd_put_64 (htab->brlt->owner, dest,
10568 htab->brlt->contents + br_entry->offset);
10569
10570 if (br_entry->iter == htab->stub_iteration)
10571 {
10572 br_entry->iter = 0;
10573
10574 if (htab->relbrlt != NULL)
10575 {
10576 /* Create a reloc for the branch lookup table entry. */
10577 Elf_Internal_Rela rela;
10578 bfd_byte *rl;
10579
10580 rela.r_offset = (br_entry->offset
10581 + htab->brlt->output_offset
10582 + htab->brlt->output_section->vma);
10583 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10584 rela.r_addend = dest;
10585
10586 rl = htab->relbrlt->contents;
10587 rl += (htab->relbrlt->reloc_count++
10588 * sizeof (Elf64_External_Rela));
10589 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10590 }
10591 else if (info->emitrelocations)
10592 {
10593 r = get_relocs (htab->brlt, 1);
10594 if (r == NULL)
10595 return FALSE;
10596 /* brlt, being SEC_LINKER_CREATED does not go through the
10597 normal reloc processing. Symbols and offsets are not
10598 translated from input file to output file form, so
10599 set up the offset per the output file. */
10600 r->r_offset = (br_entry->offset
10601 + htab->brlt->output_offset
10602 + htab->brlt->output_section->vma);
10603 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10604 r->r_addend = dest;
10605 }
10606 }
10607
10608 dest = (br_entry->offset
10609 + htab->brlt->output_offset
10610 + htab->brlt->output_section->vma);
10611
10612 off = (dest
10613 - elf_gp (htab->brlt->output_section->owner)
10614 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10615
10616 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10617 {
10618 info->callbacks->einfo
10619 (_("%P: linkage table error against `%T'\n"),
10620 stub_entry->root.string);
10621 bfd_set_error (bfd_error_bad_value);
10622 htab->stub_error = TRUE;
10623 return FALSE;
10624 }
10625
10626 if (info->emitrelocations)
10627 {
10628 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10629 if (r == NULL)
10630 return FALSE;
10631 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10632 if (bfd_big_endian (info->output_bfd))
10633 r[0].r_offset += 2;
10634 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10635 r[0].r_offset += 4;
10636 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10637 r[0].r_addend = dest;
10638 if (PPC_HA (off) != 0)
10639 {
10640 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10641 r[1].r_offset = r[0].r_offset + 4;
10642 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10643 r[1].r_addend = r[0].r_addend;
10644 }
10645 }
10646
10647 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10648 {
10649 if (PPC_HA (off) != 0)
10650 {
10651 size = 16;
10652 bfd_put_32 (htab->params->stub_bfd,
10653 ADDIS_R11_R2 | PPC_HA (off), loc);
10654 loc += 4;
10655 bfd_put_32 (htab->params->stub_bfd,
10656 LD_R12_0R11 | PPC_LO (off), loc);
10657 }
10658 else
10659 {
10660 size = 12;
10661 bfd_put_32 (htab->params->stub_bfd,
10662 LD_R12_0R2 | PPC_LO (off), loc);
10663 }
10664 }
10665 else
10666 {
10667 bfd_vma r2off = get_r2off (info, stub_entry);
10668
10669 if (r2off == 0 && htab->opd_abi)
10670 {
10671 htab->stub_error = TRUE;
10672 return FALSE;
10673 }
10674
10675 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10676 loc += 4;
10677 size = 16;
10678 if (PPC_HA (off) != 0)
10679 {
10680 size += 4;
10681 bfd_put_32 (htab->params->stub_bfd,
10682 ADDIS_R11_R2 | PPC_HA (off), loc);
10683 loc += 4;
10684 bfd_put_32 (htab->params->stub_bfd,
10685 LD_R12_0R11 | PPC_LO (off), loc);
10686 }
10687 else
10688 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
10689
10690 if (PPC_HA (r2off) != 0)
10691 {
10692 size += 4;
10693 loc += 4;
10694 bfd_put_32 (htab->params->stub_bfd,
10695 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10696 }
10697 if (PPC_LO (r2off) != 0)
10698 {
10699 size += 4;
10700 loc += 4;
10701 bfd_put_32 (htab->params->stub_bfd,
10702 ADDI_R2_R2 | PPC_LO (r2off), loc);
10703 }
10704 }
10705 loc += 4;
10706 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
10707 loc += 4;
10708 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
10709 break;
10710
10711 case ppc_stub_plt_call:
10712 case ppc_stub_plt_call_r2save:
10713 if (stub_entry->h != NULL
10714 && stub_entry->h->is_func_descriptor
10715 && stub_entry->h->oh != NULL)
10716 {
10717 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10718
10719 /* If the old-ABI "dot-symbol" is undefined make it weak so
10720 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10721 FIXME: We used to define the symbol on one of the call
10722 stubs instead, which is why we test symbol section id
10723 against htab->top_id in various places. Likely all
10724 these checks could now disappear. */
10725 if (fh->elf.root.type == bfd_link_hash_undefined)
10726 fh->elf.root.type = bfd_link_hash_undefweak;
10727 /* Stop undo_symbol_twiddle changing it back to undefined. */
10728 fh->was_undefined = 0;
10729 }
10730
10731 /* Now build the stub. */
10732 dest = stub_entry->plt_ent->plt.offset & ~1;
10733 if (dest >= (bfd_vma) -2)
10734 abort ();
10735
10736 plt = htab->elf.splt;
10737 if (!htab->elf.dynamic_sections_created
10738 || stub_entry->h == NULL
10739 || stub_entry->h->elf.dynindx == -1)
10740 plt = htab->elf.iplt;
10741
10742 dest += plt->output_offset + plt->output_section->vma;
10743
10744 if (stub_entry->h == NULL
10745 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10746 {
10747 Elf_Internal_Rela rela;
10748 bfd_byte *rl;
10749
10750 rela.r_offset = dest;
10751 if (htab->opd_abi)
10752 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10753 else
10754 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
10755 rela.r_addend = (stub_entry->target_value
10756 + stub_entry->target_section->output_offset
10757 + stub_entry->target_section->output_section->vma);
10758
10759 rl = (htab->elf.irelplt->contents
10760 + (htab->elf.irelplt->reloc_count++
10761 * sizeof (Elf64_External_Rela)));
10762 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10763 stub_entry->plt_ent->plt.offset |= 1;
10764 }
10765
10766 off = (dest
10767 - elf_gp (plt->output_section->owner)
10768 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10769
10770 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10771 {
10772 info->callbacks->einfo
10773 (_("%P: linkage table error against `%T'\n"),
10774 stub_entry->h != NULL
10775 ? stub_entry->h->elf.root.root.string
10776 : "<local sym>");
10777 bfd_set_error (bfd_error_bad_value);
10778 htab->stub_error = TRUE;
10779 return FALSE;
10780 }
10781
10782 if (htab->params->plt_stub_align != 0)
10783 {
10784 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10785
10786 stub_entry->stub_sec->size += pad;
10787 stub_entry->stub_offset = stub_entry->stub_sec->size;
10788 loc += pad;
10789 }
10790
10791 r = NULL;
10792 if (info->emitrelocations)
10793 {
10794 r = get_relocs (stub_entry->stub_sec,
10795 ((PPC_HA (off) != 0)
10796 + (htab->opd_abi
10797 ? 2 + (htab->params->plt_static_chain
10798 && PPC_HA (off + 16) == PPC_HA (off))
10799 : 1)));
10800 if (r == NULL)
10801 return FALSE;
10802 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10803 if (bfd_big_endian (info->output_bfd))
10804 r[0].r_offset += 2;
10805 r[0].r_addend = dest;
10806 }
10807 if (stub_entry->h != NULL
10808 && (stub_entry->h == htab->tls_get_addr_fd
10809 || stub_entry->h == htab->tls_get_addr)
10810 && !htab->params->no_tls_get_addr_opt)
10811 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10812 else
10813 p = build_plt_stub (htab, stub_entry, loc, off, r);
10814 size = p - loc;
10815 break;
10816
10817 default:
10818 BFD_FAIL ();
10819 return FALSE;
10820 }
10821
10822 stub_entry->stub_sec->size += size;
10823
10824 if (htab->params->emit_stub_syms)
10825 {
10826 struct elf_link_hash_entry *h;
10827 size_t len1, len2;
10828 char *name;
10829 const char *const stub_str[] = { "long_branch",
10830 "long_branch_r2off",
10831 "plt_branch",
10832 "plt_branch_r2off",
10833 "plt_call",
10834 "plt_call" };
10835
10836 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10837 len2 = strlen (stub_entry->root.string);
10838 name = bfd_malloc (len1 + len2 + 2);
10839 if (name == NULL)
10840 return FALSE;
10841 memcpy (name, stub_entry->root.string, 9);
10842 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10843 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10844 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10845 if (h == NULL)
10846 return FALSE;
10847 if (h->root.type == bfd_link_hash_new)
10848 {
10849 h->root.type = bfd_link_hash_defined;
10850 h->root.u.def.section = stub_entry->stub_sec;
10851 h->root.u.def.value = stub_entry->stub_offset;
10852 h->ref_regular = 1;
10853 h->def_regular = 1;
10854 h->ref_regular_nonweak = 1;
10855 h->forced_local = 1;
10856 h->non_elf = 0;
10857 }
10858 }
10859
10860 return TRUE;
10861 }
10862
10863 /* As above, but don't actually build the stub. Just bump offset so
10864 we know stub section sizes, and select plt_branch stubs where
10865 long_branch stubs won't do. */
10866
10867 static bfd_boolean
10868 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10869 {
10870 struct ppc_stub_hash_entry *stub_entry;
10871 struct bfd_link_info *info;
10872 struct ppc_link_hash_table *htab;
10873 bfd_vma off;
10874 int size;
10875
10876 /* Massage our args to the form they really have. */
10877 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10878 info = in_arg;
10879
10880 htab = ppc_hash_table (info);
10881 if (htab == NULL)
10882 return FALSE;
10883
10884 if (stub_entry->stub_type == ppc_stub_plt_call
10885 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10886 {
10887 asection *plt;
10888 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10889 if (off >= (bfd_vma) -2)
10890 abort ();
10891 plt = htab->elf.splt;
10892 if (!htab->elf.dynamic_sections_created
10893 || stub_entry->h == NULL
10894 || stub_entry->h->elf.dynindx == -1)
10895 plt = htab->elf.iplt;
10896 off += (plt->output_offset
10897 + plt->output_section->vma
10898 - elf_gp (plt->output_section->owner)
10899 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10900
10901 size = plt_stub_size (htab, stub_entry, off);
10902 if (htab->params->plt_stub_align)
10903 size += plt_stub_pad (htab, stub_entry, off);
10904 if (info->emitrelocations)
10905 {
10906 stub_entry->stub_sec->reloc_count
10907 += ((PPC_HA (off) != 0)
10908 + (htab->opd_abi
10909 ? 2 + (htab->params->plt_static_chain
10910 && PPC_HA (off + 16) == PPC_HA (off))
10911 : 1));
10912 stub_entry->stub_sec->flags |= SEC_RELOC;
10913 }
10914 }
10915 else
10916 {
10917 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10918 variants. */
10919 bfd_vma r2off = 0;
10920 bfd_vma local_off = 0;
10921
10922 off = (stub_entry->target_value
10923 + stub_entry->target_section->output_offset
10924 + stub_entry->target_section->output_section->vma);
10925 off -= (stub_entry->stub_sec->size
10926 + stub_entry->stub_sec->output_offset
10927 + stub_entry->stub_sec->output_section->vma);
10928
10929 /* Reset the stub type from the plt variant in case we now
10930 can reach with a shorter stub. */
10931 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10932 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10933
10934 size = 4;
10935 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10936 {
10937 r2off = get_r2off (info, stub_entry);
10938 if (r2off == 0 && htab->opd_abi)
10939 {
10940 htab->stub_error = TRUE;
10941 return FALSE;
10942 }
10943 size = 12;
10944 if (PPC_HA (r2off) != 0)
10945 size = 16;
10946 off -= size - 4;
10947 }
10948
10949 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10950
10951 /* If the branch offset if too big, use a ppc_stub_plt_branch.
10952 Do the same for -R objects without function descriptors. */
10953 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
10954 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
10955 && r2off == 0))
10956 {
10957 struct ppc_branch_hash_entry *br_entry;
10958
10959 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10960 stub_entry->root.string + 9,
10961 TRUE, FALSE);
10962 if (br_entry == NULL)
10963 {
10964 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10965 stub_entry->root.string);
10966 htab->stub_error = TRUE;
10967 return FALSE;
10968 }
10969
10970 if (br_entry->iter != htab->stub_iteration)
10971 {
10972 br_entry->iter = htab->stub_iteration;
10973 br_entry->offset = htab->brlt->size;
10974 htab->brlt->size += 8;
10975
10976 if (htab->relbrlt != NULL)
10977 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10978 else if (info->emitrelocations)
10979 {
10980 htab->brlt->reloc_count += 1;
10981 htab->brlt->flags |= SEC_RELOC;
10982 }
10983 }
10984
10985 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10986 off = (br_entry->offset
10987 + htab->brlt->output_offset
10988 + htab->brlt->output_section->vma
10989 - elf_gp (htab->brlt->output_section->owner)
10990 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10991
10992 if (info->emitrelocations)
10993 {
10994 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10995 stub_entry->stub_sec->flags |= SEC_RELOC;
10996 }
10997
10998 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10999 {
11000 size = 12;
11001 if (PPC_HA (off) != 0)
11002 size = 16;
11003 }
11004 else
11005 {
11006 size = 16;
11007 if (PPC_HA (off) != 0)
11008 size += 4;
11009
11010 if (PPC_HA (r2off) != 0)
11011 size += 4;
11012 if (PPC_LO (r2off) != 0)
11013 size += 4;
11014 }
11015 }
11016 else if (info->emitrelocations)
11017 {
11018 stub_entry->stub_sec->reloc_count += 1;
11019 stub_entry->stub_sec->flags |= SEC_RELOC;
11020 }
11021 }
11022
11023 stub_entry->stub_sec->size += size;
11024 return TRUE;
11025 }
11026
11027 /* Set up various things so that we can make a list of input sections
11028 for each output section included in the link. Returns -1 on error,
11029 0 when no stubs will be needed, and 1 on success. */
11030
11031 int
11032 ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11033 {
11034 bfd *input_bfd;
11035 int top_id, top_index, id;
11036 asection *section;
11037 asection **input_list;
11038 bfd_size_type amt;
11039 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11040
11041 if (htab == NULL)
11042 return -1;
11043
11044 /* Find the top input section id. */
11045 for (input_bfd = info->input_bfds, top_id = 3;
11046 input_bfd != NULL;
11047 input_bfd = input_bfd->link_next)
11048 {
11049 for (section = input_bfd->sections;
11050 section != NULL;
11051 section = section->next)
11052 {
11053 if (top_id < section->id)
11054 top_id = section->id;
11055 }
11056 }
11057
11058 htab->top_id = top_id;
11059 amt = sizeof (struct map_stub) * (top_id + 1);
11060 htab->stub_group = bfd_zmalloc (amt);
11061 if (htab->stub_group == NULL)
11062 return -1;
11063
11064 /* Set toc_off for com, und, abs and ind sections. */
11065 for (id = 0; id < 3; id++)
11066 htab->stub_group[id].toc_off = TOC_BASE_OFF;
11067
11068 /* We can't use output_bfd->section_count here to find the top output
11069 section index as some sections may have been removed, and
11070 strip_excluded_output_sections doesn't renumber the indices. */
11071 for (section = info->output_bfd->sections, top_index = 0;
11072 section != NULL;
11073 section = section->next)
11074 {
11075 if (top_index < section->index)
11076 top_index = section->index;
11077 }
11078
11079 htab->top_index = top_index;
11080 amt = sizeof (asection *) * (top_index + 1);
11081 input_list = bfd_zmalloc (amt);
11082 htab->input_list = input_list;
11083 if (input_list == NULL)
11084 return -1;
11085
11086 return 1;
11087 }
11088
11089 /* Set up for first pass at multitoc partitioning. */
11090
11091 void
11092 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11093 {
11094 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11095
11096 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11097 htab->toc_bfd = NULL;
11098 htab->toc_first_sec = NULL;
11099 }
11100
11101 /* The linker repeatedly calls this function for each TOC input section
11102 and linker generated GOT section. Group input bfds such that the toc
11103 within a group is less than 64k in size. */
11104
11105 bfd_boolean
11106 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11107 {
11108 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11109 bfd_vma addr, off, limit;
11110
11111 if (htab == NULL)
11112 return FALSE;
11113
11114 if (!htab->second_toc_pass)
11115 {
11116 /* Keep track of the first .toc or .got section for this input bfd. */
11117 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11118
11119 if (new_bfd)
11120 {
11121 htab->toc_bfd = isec->owner;
11122 htab->toc_first_sec = isec;
11123 }
11124
11125 addr = isec->output_offset + isec->output_section->vma;
11126 off = addr - htab->toc_curr;
11127 limit = 0x80008000;
11128 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11129 limit = 0x10000;
11130 if (off + isec->size > limit)
11131 {
11132 addr = (htab->toc_first_sec->output_offset
11133 + htab->toc_first_sec->output_section->vma);
11134 htab->toc_curr = addr;
11135 }
11136
11137 /* toc_curr is the base address of this toc group. Set elf_gp
11138 for the input section to be the offset relative to the
11139 output toc base plus 0x8000. Making the input elf_gp an
11140 offset allows us to move the toc as a whole without
11141 recalculating input elf_gp. */
11142 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11143 off += TOC_BASE_OFF;
11144
11145 /* Die if someone uses a linker script that doesn't keep input
11146 file .toc and .got together. */
11147 if (new_bfd
11148 && elf_gp (isec->owner) != 0
11149 && elf_gp (isec->owner) != off)
11150 return FALSE;
11151
11152 elf_gp (isec->owner) = off;
11153 return TRUE;
11154 }
11155
11156 /* During the second pass toc_first_sec points to the start of
11157 a toc group, and toc_curr is used to track the old elf_gp.
11158 We use toc_bfd to ensure we only look at each bfd once. */
11159 if (htab->toc_bfd == isec->owner)
11160 return TRUE;
11161 htab->toc_bfd = isec->owner;
11162
11163 if (htab->toc_first_sec == NULL
11164 || htab->toc_curr != elf_gp (isec->owner))
11165 {
11166 htab->toc_curr = elf_gp (isec->owner);
11167 htab->toc_first_sec = isec;
11168 }
11169 addr = (htab->toc_first_sec->output_offset
11170 + htab->toc_first_sec->output_section->vma);
11171 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11172 elf_gp (isec->owner) = off;
11173
11174 return TRUE;
11175 }
11176
11177 /* Called via elf_link_hash_traverse to merge GOT entries for global
11178 symbol H. */
11179
11180 static bfd_boolean
11181 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11182 {
11183 if (h->root.type == bfd_link_hash_indirect)
11184 return TRUE;
11185
11186 merge_got_entries (&h->got.glist);
11187
11188 return TRUE;
11189 }
11190
11191 /* Called via elf_link_hash_traverse to allocate GOT entries for global
11192 symbol H. */
11193
11194 static bfd_boolean
11195 reallocate_got (struct elf_link_hash_entry *h, void *inf)
11196 {
11197 struct got_entry *gent;
11198
11199 if (h->root.type == bfd_link_hash_indirect)
11200 return TRUE;
11201
11202 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11203 if (!gent->is_indirect)
11204 allocate_got (h, (struct bfd_link_info *) inf, gent);
11205 return TRUE;
11206 }
11207
11208 /* Called on the first multitoc pass after the last call to
11209 ppc64_elf_next_toc_section. This function removes duplicate GOT
11210 entries. */
11211
11212 bfd_boolean
11213 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11214 {
11215 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11216 struct bfd *ibfd, *ibfd2;
11217 bfd_boolean done_something;
11218
11219 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11220
11221 if (!htab->do_multi_toc)
11222 return FALSE;
11223
11224 /* Merge global sym got entries within a toc group. */
11225 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11226
11227 /* And tlsld_got. */
11228 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11229 {
11230 struct got_entry *ent, *ent2;
11231
11232 if (!is_ppc64_elf (ibfd))
11233 continue;
11234
11235 ent = ppc64_tlsld_got (ibfd);
11236 if (!ent->is_indirect
11237 && ent->got.offset != (bfd_vma) -1)
11238 {
11239 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
11240 {
11241 if (!is_ppc64_elf (ibfd2))
11242 continue;
11243
11244 ent2 = ppc64_tlsld_got (ibfd2);
11245 if (!ent2->is_indirect
11246 && ent2->got.offset != (bfd_vma) -1
11247 && elf_gp (ibfd2) == elf_gp (ibfd))
11248 {
11249 ent2->is_indirect = TRUE;
11250 ent2->got.ent = ent;
11251 }
11252 }
11253 }
11254 }
11255
11256 /* Zap sizes of got sections. */
11257 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11258 htab->elf.irelplt->size -= htab->got_reli_size;
11259 htab->got_reli_size = 0;
11260
11261 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11262 {
11263 asection *got, *relgot;
11264
11265 if (!is_ppc64_elf (ibfd))
11266 continue;
11267
11268 got = ppc64_elf_tdata (ibfd)->got;
11269 if (got != NULL)
11270 {
11271 got->rawsize = got->size;
11272 got->size = 0;
11273 relgot = ppc64_elf_tdata (ibfd)->relgot;
11274 relgot->rawsize = relgot->size;
11275 relgot->size = 0;
11276 }
11277 }
11278
11279 /* Now reallocate the got, local syms first. We don't need to
11280 allocate section contents again since we never increase size. */
11281 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11282 {
11283 struct got_entry **lgot_ents;
11284 struct got_entry **end_lgot_ents;
11285 struct plt_entry **local_plt;
11286 struct plt_entry **end_local_plt;
11287 unsigned char *lgot_masks;
11288 bfd_size_type locsymcount;
11289 Elf_Internal_Shdr *symtab_hdr;
11290 asection *s;
11291
11292 if (!is_ppc64_elf (ibfd))
11293 continue;
11294
11295 lgot_ents = elf_local_got_ents (ibfd);
11296 if (!lgot_ents)
11297 continue;
11298
11299 symtab_hdr = &elf_symtab_hdr (ibfd);
11300 locsymcount = symtab_hdr->sh_info;
11301 end_lgot_ents = lgot_ents + locsymcount;
11302 local_plt = (struct plt_entry **) end_lgot_ents;
11303 end_local_plt = local_plt + locsymcount;
11304 lgot_masks = (unsigned char *) end_local_plt;
11305 s = ppc64_elf_tdata (ibfd)->got;
11306 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11307 {
11308 struct got_entry *ent;
11309
11310 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11311 {
11312 unsigned int ent_size = 8;
11313 unsigned int rel_size = sizeof (Elf64_External_Rela);
11314
11315 ent->got.offset = s->size;
11316 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11317 {
11318 ent_size *= 2;
11319 rel_size *= 2;
11320 }
11321 s->size += ent_size;
11322 if ((*lgot_masks & PLT_IFUNC) != 0)
11323 {
11324 htab->elf.irelplt->size += rel_size;
11325 htab->got_reli_size += rel_size;
11326 }
11327 else if (info->shared)
11328 {
11329 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11330 srel->size += rel_size;
11331 }
11332 }
11333 }
11334 }
11335
11336 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11337
11338 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11339 {
11340 struct got_entry *ent;
11341
11342 if (!is_ppc64_elf (ibfd))
11343 continue;
11344
11345 ent = ppc64_tlsld_got (ibfd);
11346 if (!ent->is_indirect
11347 && ent->got.offset != (bfd_vma) -1)
11348 {
11349 asection *s = ppc64_elf_tdata (ibfd)->got;
11350 ent->got.offset = s->size;
11351 s->size += 16;
11352 if (info->shared)
11353 {
11354 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11355 srel->size += sizeof (Elf64_External_Rela);
11356 }
11357 }
11358 }
11359
11360 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11361 if (!done_something)
11362 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11363 {
11364 asection *got;
11365
11366 if (!is_ppc64_elf (ibfd))
11367 continue;
11368
11369 got = ppc64_elf_tdata (ibfd)->got;
11370 if (got != NULL)
11371 {
11372 done_something = got->rawsize != got->size;
11373 if (done_something)
11374 break;
11375 }
11376 }
11377
11378 if (done_something)
11379 (*htab->params->layout_sections_again) ();
11380
11381 /* Set up for second pass over toc sections to recalculate elf_gp
11382 on input sections. */
11383 htab->toc_bfd = NULL;
11384 htab->toc_first_sec = NULL;
11385 htab->second_toc_pass = TRUE;
11386 return done_something;
11387 }
11388
11389 /* Called after second pass of multitoc partitioning. */
11390
11391 void
11392 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11393 {
11394 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11395
11396 /* After the second pass, toc_curr tracks the TOC offset used
11397 for code sections below in ppc64_elf_next_input_section. */
11398 htab->toc_curr = TOC_BASE_OFF;
11399 }
11400
11401 /* No toc references were found in ISEC. If the code in ISEC makes no
11402 calls, then there's no need to use toc adjusting stubs when branching
11403 into ISEC. Actually, indirect calls from ISEC are OK as they will
11404 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11405 needed, and 2 if a cyclical call-graph was found but no other reason
11406 for a stub was detected. If called from the top level, a return of
11407 2 means the same as a return of 0. */
11408
11409 static int
11410 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11411 {
11412 int ret;
11413
11414 /* Mark this section as checked. */
11415 isec->call_check_done = 1;
11416
11417 /* We know none of our code bearing sections will need toc stubs. */
11418 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11419 return 0;
11420
11421 if (isec->size == 0)
11422 return 0;
11423
11424 if (isec->output_section == NULL)
11425 return 0;
11426
11427 ret = 0;
11428 if (isec->reloc_count != 0)
11429 {
11430 Elf_Internal_Rela *relstart, *rel;
11431 Elf_Internal_Sym *local_syms;
11432 struct ppc_link_hash_table *htab;
11433
11434 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11435 info->keep_memory);
11436 if (relstart == NULL)
11437 return -1;
11438
11439 /* Look for branches to outside of this section. */
11440 local_syms = NULL;
11441 htab = ppc_hash_table (info);
11442 if (htab == NULL)
11443 return -1;
11444
11445 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11446 {
11447 enum elf_ppc64_reloc_type r_type;
11448 unsigned long r_symndx;
11449 struct elf_link_hash_entry *h;
11450 struct ppc_link_hash_entry *eh;
11451 Elf_Internal_Sym *sym;
11452 asection *sym_sec;
11453 struct _opd_sec_data *opd;
11454 bfd_vma sym_value;
11455 bfd_vma dest;
11456
11457 r_type = ELF64_R_TYPE (rel->r_info);
11458 if (r_type != R_PPC64_REL24
11459 && r_type != R_PPC64_REL14
11460 && r_type != R_PPC64_REL14_BRTAKEN
11461 && r_type != R_PPC64_REL14_BRNTAKEN)
11462 continue;
11463
11464 r_symndx = ELF64_R_SYM (rel->r_info);
11465 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11466 isec->owner))
11467 {
11468 ret = -1;
11469 break;
11470 }
11471
11472 /* Calls to dynamic lib functions go through a plt call stub
11473 that uses r2. */
11474 eh = (struct ppc_link_hash_entry *) h;
11475 if (eh != NULL
11476 && (eh->elf.plt.plist != NULL
11477 || (eh->oh != NULL
11478 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11479 {
11480 ret = 1;
11481 break;
11482 }
11483
11484 if (sym_sec == NULL)
11485 /* Ignore other undefined symbols. */
11486 continue;
11487
11488 /* Assume branches to other sections not included in the
11489 link need stubs too, to cover -R and absolute syms. */
11490 if (sym_sec->output_section == NULL)
11491 {
11492 ret = 1;
11493 break;
11494 }
11495
11496 if (h == NULL)
11497 sym_value = sym->st_value;
11498 else
11499 {
11500 if (h->root.type != bfd_link_hash_defined
11501 && h->root.type != bfd_link_hash_defweak)
11502 abort ();
11503 sym_value = h->root.u.def.value;
11504 }
11505 sym_value += rel->r_addend;
11506
11507 /* If this branch reloc uses an opd sym, find the code section. */
11508 opd = get_opd_info (sym_sec);
11509 if (opd != NULL)
11510 {
11511 if (h == NULL && opd->adjust != NULL)
11512 {
11513 long adjust;
11514
11515 adjust = opd->adjust[sym->st_value / 8];
11516 if (adjust == -1)
11517 /* Assume deleted functions won't ever be called. */
11518 continue;
11519 sym_value += adjust;
11520 }
11521
11522 dest = opd_entry_value (sym_sec, sym_value,
11523 &sym_sec, NULL, FALSE);
11524 if (dest == (bfd_vma) -1)
11525 continue;
11526 }
11527 else
11528 dest = (sym_value
11529 + sym_sec->output_offset
11530 + sym_sec->output_section->vma);
11531
11532 /* Ignore branch to self. */
11533 if (sym_sec == isec)
11534 continue;
11535
11536 /* If the called function uses the toc, we need a stub. */
11537 if (sym_sec->has_toc_reloc
11538 || sym_sec->makes_toc_func_call)
11539 {
11540 ret = 1;
11541 break;
11542 }
11543
11544 /* Assume any branch that needs a long branch stub might in fact
11545 need a plt_branch stub. A plt_branch stub uses r2. */
11546 else if (dest - (isec->output_offset
11547 + isec->output_section->vma
11548 + rel->r_offset) + (1 << 25)
11549 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11550 ? h->other
11551 : sym->st_other))
11552 {
11553 ret = 1;
11554 break;
11555 }
11556
11557 /* If calling back to a section in the process of being
11558 tested, we can't say for sure that no toc adjusting stubs
11559 are needed, so don't return zero. */
11560 else if (sym_sec->call_check_in_progress)
11561 ret = 2;
11562
11563 /* Branches to another section that itself doesn't have any TOC
11564 references are OK. Recursively call ourselves to check. */
11565 else if (!sym_sec->call_check_done)
11566 {
11567 int recur;
11568
11569 /* Mark current section as indeterminate, so that other
11570 sections that call back to current won't be marked as
11571 known. */
11572 isec->call_check_in_progress = 1;
11573 recur = toc_adjusting_stub_needed (info, sym_sec);
11574 isec->call_check_in_progress = 0;
11575
11576 if (recur != 0)
11577 {
11578 ret = recur;
11579 if (recur != 2)
11580 break;
11581 }
11582 }
11583 }
11584
11585 if (local_syms != NULL
11586 && (elf_symtab_hdr (isec->owner).contents
11587 != (unsigned char *) local_syms))
11588 free (local_syms);
11589 if (elf_section_data (isec)->relocs != relstart)
11590 free (relstart);
11591 }
11592
11593 if ((ret & 1) == 0
11594 && isec->map_head.s != NULL
11595 && (strcmp (isec->output_section->name, ".init") == 0
11596 || strcmp (isec->output_section->name, ".fini") == 0))
11597 {
11598 if (isec->map_head.s->has_toc_reloc
11599 || isec->map_head.s->makes_toc_func_call)
11600 ret = 1;
11601 else if (!isec->map_head.s->call_check_done)
11602 {
11603 int recur;
11604 isec->call_check_in_progress = 1;
11605 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11606 isec->call_check_in_progress = 0;
11607 if (recur != 0)
11608 ret = recur;
11609 }
11610 }
11611
11612 if (ret == 1)
11613 isec->makes_toc_func_call = 1;
11614
11615 return ret;
11616 }
11617
11618 /* The linker repeatedly calls this function for each input section,
11619 in the order that input sections are linked into output sections.
11620 Build lists of input sections to determine groupings between which
11621 we may insert linker stubs. */
11622
11623 bfd_boolean
11624 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11625 {
11626 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11627
11628 if (htab == NULL)
11629 return FALSE;
11630
11631 if ((isec->output_section->flags & SEC_CODE) != 0
11632 && isec->output_section->index <= htab->top_index)
11633 {
11634 asection **list = htab->input_list + isec->output_section->index;
11635 /* Steal the link_sec pointer for our list. */
11636 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11637 /* This happens to make the list in reverse order,
11638 which is what we want. */
11639 PREV_SEC (isec) = *list;
11640 *list = isec;
11641 }
11642
11643 if (htab->multi_toc_needed)
11644 {
11645 /* Analyse sections that aren't already flagged as needing a
11646 valid toc pointer. Exclude .fixup for the linux kernel.
11647 .fixup contains branches, but only back to the function that
11648 hit an exception. */
11649 if (!(isec->has_toc_reloc
11650 || (isec->flags & SEC_CODE) == 0
11651 || strcmp (isec->name, ".fixup") == 0
11652 || isec->call_check_done))
11653 {
11654 if (toc_adjusting_stub_needed (info, isec) < 0)
11655 return FALSE;
11656 }
11657 /* Make all sections use the TOC assigned for this object file.
11658 This will be wrong for pasted sections; We fix that in
11659 check_pasted_section(). */
11660 if (elf_gp (isec->owner) != 0)
11661 htab->toc_curr = elf_gp (isec->owner);
11662 }
11663
11664 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11665 return TRUE;
11666 }
11667
11668 /* Check that all .init and .fini sections use the same toc, if they
11669 have toc relocs. */
11670
11671 static bfd_boolean
11672 check_pasted_section (struct bfd_link_info *info, const char *name)
11673 {
11674 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11675
11676 if (o != NULL)
11677 {
11678 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11679 bfd_vma toc_off = 0;
11680 asection *i;
11681
11682 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11683 if (i->has_toc_reloc)
11684 {
11685 if (toc_off == 0)
11686 toc_off = htab->stub_group[i->id].toc_off;
11687 else if (toc_off != htab->stub_group[i->id].toc_off)
11688 return FALSE;
11689 }
11690
11691 if (toc_off == 0)
11692 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11693 if (i->makes_toc_func_call)
11694 {
11695 toc_off = htab->stub_group[i->id].toc_off;
11696 break;
11697 }
11698
11699 /* Make sure the whole pasted function uses the same toc offset. */
11700 if (toc_off != 0)
11701 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11702 htab->stub_group[i->id].toc_off = toc_off;
11703 }
11704 return TRUE;
11705 }
11706
11707 bfd_boolean
11708 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11709 {
11710 return (check_pasted_section (info, ".init")
11711 & check_pasted_section (info, ".fini"));
11712 }
11713
11714 /* See whether we can group stub sections together. Grouping stub
11715 sections may result in fewer stubs. More importantly, we need to
11716 put all .init* and .fini* stubs at the beginning of the .init or
11717 .fini output sections respectively, because glibc splits the
11718 _init and _fini functions into multiple parts. Putting a stub in
11719 the middle of a function is not a good idea. */
11720
11721 static void
11722 group_sections (struct ppc_link_hash_table *htab,
11723 bfd_size_type stub_group_size,
11724 bfd_boolean stubs_always_before_branch)
11725 {
11726 asection **list;
11727 bfd_size_type stub14_group_size;
11728 bfd_boolean suppress_size_errors;
11729
11730 suppress_size_errors = FALSE;
11731 stub14_group_size = stub_group_size;
11732 if (stub_group_size == 1)
11733 {
11734 /* Default values. */
11735 if (stubs_always_before_branch)
11736 {
11737 stub_group_size = 0x1e00000;
11738 stub14_group_size = 0x7800;
11739 }
11740 else
11741 {
11742 stub_group_size = 0x1c00000;
11743 stub14_group_size = 0x7000;
11744 }
11745 suppress_size_errors = TRUE;
11746 }
11747
11748 list = htab->input_list + htab->top_index;
11749 do
11750 {
11751 asection *tail = *list;
11752 while (tail != NULL)
11753 {
11754 asection *curr;
11755 asection *prev;
11756 bfd_size_type total;
11757 bfd_boolean big_sec;
11758 bfd_vma curr_toc;
11759
11760 curr = tail;
11761 total = tail->size;
11762 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11763 && ppc64_elf_section_data (tail)->has_14bit_branch
11764 ? stub14_group_size : stub_group_size);
11765 if (big_sec && !suppress_size_errors)
11766 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11767 tail->owner, tail);
11768 curr_toc = htab->stub_group[tail->id].toc_off;
11769
11770 while ((prev = PREV_SEC (curr)) != NULL
11771 && ((total += curr->output_offset - prev->output_offset)
11772 < (ppc64_elf_section_data (prev) != NULL
11773 && ppc64_elf_section_data (prev)->has_14bit_branch
11774 ? stub14_group_size : stub_group_size))
11775 && htab->stub_group[prev->id].toc_off == curr_toc)
11776 curr = prev;
11777
11778 /* OK, the size from the start of CURR to the end is less
11779 than stub_group_size and thus can be handled by one stub
11780 section. (or the tail section is itself larger than
11781 stub_group_size, in which case we may be toast.) We
11782 should really be keeping track of the total size of stubs
11783 added here, as stubs contribute to the final output
11784 section size. That's a little tricky, and this way will
11785 only break if stubs added make the total size more than
11786 2^25, ie. for the default stub_group_size, if stubs total
11787 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11788 do
11789 {
11790 prev = PREV_SEC (tail);
11791 /* Set up this stub group. */
11792 htab->stub_group[tail->id].link_sec = curr;
11793 }
11794 while (tail != curr && (tail = prev) != NULL);
11795
11796 /* But wait, there's more! Input sections up to stub_group_size
11797 bytes before the stub section can be handled by it too.
11798 Don't do this if we have a really large section after the
11799 stubs, as adding more stubs increases the chance that
11800 branches may not reach into the stub section. */
11801 if (!stubs_always_before_branch && !big_sec)
11802 {
11803 total = 0;
11804 while (prev != NULL
11805 && ((total += tail->output_offset - prev->output_offset)
11806 < (ppc64_elf_section_data (prev) != NULL
11807 && ppc64_elf_section_data (prev)->has_14bit_branch
11808 ? stub14_group_size : stub_group_size))
11809 && htab->stub_group[prev->id].toc_off == curr_toc)
11810 {
11811 tail = prev;
11812 prev = PREV_SEC (tail);
11813 htab->stub_group[tail->id].link_sec = curr;
11814 }
11815 }
11816 tail = prev;
11817 }
11818 }
11819 while (list-- != htab->input_list);
11820 free (htab->input_list);
11821 #undef PREV_SEC
11822 }
11823
11824 static const unsigned char glink_eh_frame_cie[] =
11825 {
11826 0, 0, 0, 16, /* length. */
11827 0, 0, 0, 0, /* id. */
11828 1, /* CIE version. */
11829 'z', 'R', 0, /* Augmentation string. */
11830 4, /* Code alignment. */
11831 0x78, /* Data alignment. */
11832 65, /* RA reg. */
11833 1, /* Augmentation size. */
11834 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11835 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11836 };
11837
11838 /* Stripping output sections is normally done before dynamic section
11839 symbols have been allocated. This function is called later, and
11840 handles cases like htab->brlt which is mapped to its own output
11841 section. */
11842
11843 static void
11844 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11845 {
11846 if (isec->size == 0
11847 && isec->output_section->size == 0
11848 && !(isec->output_section->flags & SEC_KEEP)
11849 && !bfd_section_removed_from_list (info->output_bfd,
11850 isec->output_section)
11851 && elf_section_data (isec->output_section)->dynindx == 0)
11852 {
11853 isec->output_section->flags |= SEC_EXCLUDE;
11854 bfd_section_list_remove (info->output_bfd, isec->output_section);
11855 info->output_bfd->section_count--;
11856 }
11857 }
11858
11859 /* Determine and set the size of the stub section for a final link.
11860
11861 The basic idea here is to examine all the relocations looking for
11862 PC-relative calls to a target that is unreachable with a "bl"
11863 instruction. */
11864
11865 bfd_boolean
11866 ppc64_elf_size_stubs (struct bfd_link_info *info)
11867 {
11868 bfd_size_type stub_group_size;
11869 bfd_boolean stubs_always_before_branch;
11870 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11871
11872 if (htab == NULL)
11873 return FALSE;
11874
11875 if (htab->params->plt_thread_safe == -1 && !info->executable)
11876 htab->params->plt_thread_safe = 1;
11877 if (!htab->opd_abi)
11878 htab->params->plt_thread_safe = 0;
11879 else if (htab->params->plt_thread_safe == -1)
11880 {
11881 static const char *const thread_starter[] =
11882 {
11883 "pthread_create",
11884 /* libstdc++ */
11885 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11886 /* librt */
11887 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11888 "mq_notify", "create_timer",
11889 /* libanl */
11890 "getaddrinfo_a",
11891 /* libgomp */
11892 "GOMP_parallel_start",
11893 "GOMP_parallel_loop_static_start",
11894 "GOMP_parallel_loop_dynamic_start",
11895 "GOMP_parallel_loop_guided_start",
11896 "GOMP_parallel_loop_runtime_start",
11897 "GOMP_parallel_sections_start",
11898 };
11899 unsigned i;
11900
11901 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11902 {
11903 struct elf_link_hash_entry *h;
11904 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11905 FALSE, FALSE, TRUE);
11906 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
11907 if (htab->params->plt_thread_safe)
11908 break;
11909 }
11910 }
11911 stubs_always_before_branch = htab->params->group_size < 0;
11912 if (htab->params->group_size < 0)
11913 stub_group_size = -htab->params->group_size;
11914 else
11915 stub_group_size = htab->params->group_size;
11916
11917 group_sections (htab, stub_group_size, stubs_always_before_branch);
11918
11919 while (1)
11920 {
11921 bfd *input_bfd;
11922 unsigned int bfd_indx;
11923 asection *stub_sec;
11924
11925 htab->stub_iteration += 1;
11926
11927 for (input_bfd = info->input_bfds, bfd_indx = 0;
11928 input_bfd != NULL;
11929 input_bfd = input_bfd->link_next, bfd_indx++)
11930 {
11931 Elf_Internal_Shdr *symtab_hdr;
11932 asection *section;
11933 Elf_Internal_Sym *local_syms = NULL;
11934
11935 if (!is_ppc64_elf (input_bfd))
11936 continue;
11937
11938 /* We'll need the symbol table in a second. */
11939 symtab_hdr = &elf_symtab_hdr (input_bfd);
11940 if (symtab_hdr->sh_info == 0)
11941 continue;
11942
11943 /* Walk over each section attached to the input bfd. */
11944 for (section = input_bfd->sections;
11945 section != NULL;
11946 section = section->next)
11947 {
11948 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11949
11950 /* If there aren't any relocs, then there's nothing more
11951 to do. */
11952 if ((section->flags & SEC_RELOC) == 0
11953 || (section->flags & SEC_ALLOC) == 0
11954 || (section->flags & SEC_LOAD) == 0
11955 || (section->flags & SEC_CODE) == 0
11956 || section->reloc_count == 0)
11957 continue;
11958
11959 /* If this section is a link-once section that will be
11960 discarded, then don't create any stubs. */
11961 if (section->output_section == NULL
11962 || section->output_section->owner != info->output_bfd)
11963 continue;
11964
11965 /* Get the relocs. */
11966 internal_relocs
11967 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11968 info->keep_memory);
11969 if (internal_relocs == NULL)
11970 goto error_ret_free_local;
11971
11972 /* Now examine each relocation. */
11973 irela = internal_relocs;
11974 irelaend = irela + section->reloc_count;
11975 for (; irela < irelaend; irela++)
11976 {
11977 enum elf_ppc64_reloc_type r_type;
11978 unsigned int r_indx;
11979 enum ppc_stub_type stub_type;
11980 struct ppc_stub_hash_entry *stub_entry;
11981 asection *sym_sec, *code_sec;
11982 bfd_vma sym_value, code_value;
11983 bfd_vma destination;
11984 unsigned long local_off;
11985 bfd_boolean ok_dest;
11986 struct ppc_link_hash_entry *hash;
11987 struct ppc_link_hash_entry *fdh;
11988 struct elf_link_hash_entry *h;
11989 Elf_Internal_Sym *sym;
11990 char *stub_name;
11991 const asection *id_sec;
11992 struct _opd_sec_data *opd;
11993 struct plt_entry *plt_ent;
11994
11995 r_type = ELF64_R_TYPE (irela->r_info);
11996 r_indx = ELF64_R_SYM (irela->r_info);
11997
11998 if (r_type >= R_PPC64_max)
11999 {
12000 bfd_set_error (bfd_error_bad_value);
12001 goto error_ret_free_internal;
12002 }
12003
12004 /* Only look for stubs on branch instructions. */
12005 if (r_type != R_PPC64_REL24
12006 && r_type != R_PPC64_REL14
12007 && r_type != R_PPC64_REL14_BRTAKEN
12008 && r_type != R_PPC64_REL14_BRNTAKEN)
12009 continue;
12010
12011 /* Now determine the call target, its name, value,
12012 section. */
12013 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12014 r_indx, input_bfd))
12015 goto error_ret_free_internal;
12016 hash = (struct ppc_link_hash_entry *) h;
12017
12018 ok_dest = FALSE;
12019 fdh = NULL;
12020 sym_value = 0;
12021 if (hash == NULL)
12022 {
12023 sym_value = sym->st_value;
12024 ok_dest = TRUE;
12025 }
12026 else if (hash->elf.root.type == bfd_link_hash_defined
12027 || hash->elf.root.type == bfd_link_hash_defweak)
12028 {
12029 sym_value = hash->elf.root.u.def.value;
12030 if (sym_sec->output_section != NULL)
12031 ok_dest = TRUE;
12032 }
12033 else if (hash->elf.root.type == bfd_link_hash_undefweak
12034 || hash->elf.root.type == bfd_link_hash_undefined)
12035 {
12036 /* Recognise an old ABI func code entry sym, and
12037 use the func descriptor sym instead if it is
12038 defined. */
12039 if (hash->elf.root.root.string[0] == '.'
12040 && (fdh = lookup_fdh (hash, htab)) != NULL)
12041 {
12042 if (fdh->elf.root.type == bfd_link_hash_defined
12043 || fdh->elf.root.type == bfd_link_hash_defweak)
12044 {
12045 sym_sec = fdh->elf.root.u.def.section;
12046 sym_value = fdh->elf.root.u.def.value;
12047 if (sym_sec->output_section != NULL)
12048 ok_dest = TRUE;
12049 }
12050 else
12051 fdh = NULL;
12052 }
12053 }
12054 else
12055 {
12056 bfd_set_error (bfd_error_bad_value);
12057 goto error_ret_free_internal;
12058 }
12059
12060 destination = 0;
12061 local_off = 0;
12062 if (ok_dest)
12063 {
12064 sym_value += irela->r_addend;
12065 destination = (sym_value
12066 + sym_sec->output_offset
12067 + sym_sec->output_section->vma);
12068 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12069 ? hash->elf.other
12070 : sym->st_other);
12071 }
12072
12073 code_sec = sym_sec;
12074 code_value = sym_value;
12075 opd = get_opd_info (sym_sec);
12076 if (opd != NULL)
12077 {
12078 bfd_vma dest;
12079
12080 if (hash == NULL && opd->adjust != NULL)
12081 {
12082 long adjust = opd->adjust[sym_value / 8];
12083 if (adjust == -1)
12084 continue;
12085 code_value += adjust;
12086 sym_value += adjust;
12087 }
12088 dest = opd_entry_value (sym_sec, sym_value,
12089 &code_sec, &code_value, FALSE);
12090 if (dest != (bfd_vma) -1)
12091 {
12092 destination = dest;
12093 if (fdh != NULL)
12094 {
12095 /* Fixup old ABI sym to point at code
12096 entry. */
12097 hash->elf.root.type = bfd_link_hash_defweak;
12098 hash->elf.root.u.def.section = code_sec;
12099 hash->elf.root.u.def.value = code_value;
12100 }
12101 }
12102 }
12103
12104 /* Determine what (if any) linker stub is needed. */
12105 plt_ent = NULL;
12106 stub_type = ppc_type_of_stub (section, irela, &hash,
12107 &plt_ent, destination,
12108 local_off);
12109
12110 if (stub_type != ppc_stub_plt_call)
12111 {
12112 /* Check whether we need a TOC adjusting stub.
12113 Since the linker pastes together pieces from
12114 different object files when creating the
12115 _init and _fini functions, it may be that a
12116 call to what looks like a local sym is in
12117 fact a call needing a TOC adjustment. */
12118 if (code_sec != NULL
12119 && code_sec->output_section != NULL
12120 && (htab->stub_group[code_sec->id].toc_off
12121 != htab->stub_group[section->id].toc_off)
12122 && (code_sec->has_toc_reloc
12123 || code_sec->makes_toc_func_call))
12124 stub_type = ppc_stub_long_branch_r2off;
12125 }
12126
12127 if (stub_type == ppc_stub_none)
12128 continue;
12129
12130 /* __tls_get_addr calls might be eliminated. */
12131 if (stub_type != ppc_stub_plt_call
12132 && hash != NULL
12133 && (hash == htab->tls_get_addr
12134 || hash == htab->tls_get_addr_fd)
12135 && section->has_tls_reloc
12136 && irela != internal_relocs)
12137 {
12138 /* Get tls info. */
12139 unsigned char *tls_mask;
12140
12141 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12142 irela - 1, input_bfd))
12143 goto error_ret_free_internal;
12144 if (*tls_mask != 0)
12145 continue;
12146 }
12147
12148 if (stub_type == ppc_stub_plt_call
12149 && irela + 1 < irelaend
12150 && irela[1].r_offset == irela->r_offset + 4
12151 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12152 {
12153 if (!tocsave_find (htab, INSERT,
12154 &local_syms, irela + 1, input_bfd))
12155 goto error_ret_free_internal;
12156 }
12157 else if (stub_type == ppc_stub_plt_call)
12158 stub_type = ppc_stub_plt_call_r2save;
12159
12160 /* Support for grouping stub sections. */
12161 id_sec = htab->stub_group[section->id].link_sec;
12162
12163 /* Get the name of this stub. */
12164 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12165 if (!stub_name)
12166 goto error_ret_free_internal;
12167
12168 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12169 stub_name, FALSE, FALSE);
12170 if (stub_entry != NULL)
12171 {
12172 /* The proper stub has already been created. */
12173 free (stub_name);
12174 if (stub_type == ppc_stub_plt_call_r2save)
12175 stub_entry->stub_type = stub_type;
12176 continue;
12177 }
12178
12179 stub_entry = ppc_add_stub (stub_name, section, info);
12180 if (stub_entry == NULL)
12181 {
12182 free (stub_name);
12183 error_ret_free_internal:
12184 if (elf_section_data (section)->relocs == NULL)
12185 free (internal_relocs);
12186 error_ret_free_local:
12187 if (local_syms != NULL
12188 && (symtab_hdr->contents
12189 != (unsigned char *) local_syms))
12190 free (local_syms);
12191 return FALSE;
12192 }
12193
12194 stub_entry->stub_type = stub_type;
12195 if (stub_type != ppc_stub_plt_call
12196 && stub_type != ppc_stub_plt_call_r2save)
12197 {
12198 stub_entry->target_value = code_value;
12199 stub_entry->target_section = code_sec;
12200 }
12201 else
12202 {
12203 stub_entry->target_value = sym_value;
12204 stub_entry->target_section = sym_sec;
12205 }
12206 stub_entry->h = hash;
12207 stub_entry->plt_ent = plt_ent;
12208 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12209
12210 if (stub_entry->h != NULL)
12211 htab->stub_globals += 1;
12212 }
12213
12214 /* We're done with the internal relocs, free them. */
12215 if (elf_section_data (section)->relocs != internal_relocs)
12216 free (internal_relocs);
12217 }
12218
12219 if (local_syms != NULL
12220 && symtab_hdr->contents != (unsigned char *) local_syms)
12221 {
12222 if (!info->keep_memory)
12223 free (local_syms);
12224 else
12225 symtab_hdr->contents = (unsigned char *) local_syms;
12226 }
12227 }
12228
12229 /* We may have added some stubs. Find out the new size of the
12230 stub sections. */
12231 for (stub_sec = htab->params->stub_bfd->sections;
12232 stub_sec != NULL;
12233 stub_sec = stub_sec->next)
12234 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12235 {
12236 stub_sec->rawsize = stub_sec->size;
12237 stub_sec->size = 0;
12238 stub_sec->reloc_count = 0;
12239 stub_sec->flags &= ~SEC_RELOC;
12240 }
12241
12242 htab->brlt->size = 0;
12243 htab->brlt->reloc_count = 0;
12244 htab->brlt->flags &= ~SEC_RELOC;
12245 if (htab->relbrlt != NULL)
12246 htab->relbrlt->size = 0;
12247
12248 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12249
12250 if (info->emitrelocations
12251 && htab->glink != NULL && htab->glink->size != 0)
12252 {
12253 htab->glink->reloc_count = 1;
12254 htab->glink->flags |= SEC_RELOC;
12255 }
12256
12257 if (htab->glink_eh_frame != NULL
12258 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12259 && htab->glink_eh_frame->output_section->size != 0)
12260 {
12261 size_t size = 0, align;
12262
12263 for (stub_sec = htab->params->stub_bfd->sections;
12264 stub_sec != NULL;
12265 stub_sec = stub_sec->next)
12266 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12267 size += 20;
12268 if (htab->glink != NULL && htab->glink->size != 0)
12269 size += 24;
12270 if (size != 0)
12271 size += sizeof (glink_eh_frame_cie);
12272 align = 1;
12273 align <<= htab->glink_eh_frame->output_section->alignment_power;
12274 align -= 1;
12275 size = (size + align) & ~align;
12276 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12277 htab->glink_eh_frame->size = size;
12278 }
12279
12280 if (htab->params->plt_stub_align != 0)
12281 for (stub_sec = htab->params->stub_bfd->sections;
12282 stub_sec != NULL;
12283 stub_sec = stub_sec->next)
12284 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12285 stub_sec->size = ((stub_sec->size
12286 + (1 << htab->params->plt_stub_align) - 1)
12287 & (-1 << htab->params->plt_stub_align));
12288
12289 for (stub_sec = htab->params->stub_bfd->sections;
12290 stub_sec != NULL;
12291 stub_sec = stub_sec->next)
12292 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12293 && stub_sec->rawsize != stub_sec->size)
12294 break;
12295
12296 /* Exit from this loop when no stubs have been added, and no stubs
12297 have changed size. */
12298 if (stub_sec == NULL
12299 && (htab->glink_eh_frame == NULL
12300 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12301 break;
12302
12303 /* Ask the linker to do its stuff. */
12304 (*htab->params->layout_sections_again) ();
12305 }
12306
12307 maybe_strip_output (info, htab->brlt);
12308 if (htab->glink_eh_frame != NULL)
12309 maybe_strip_output (info, htab->glink_eh_frame);
12310
12311 return TRUE;
12312 }
12313
12314 /* Called after we have determined section placement. If sections
12315 move, we'll be called again. Provide a value for TOCstart. */
12316
12317 bfd_vma
12318 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12319 {
12320 asection *s;
12321 bfd_vma TOCstart;
12322
12323 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12324 order. The TOC starts where the first of these sections starts. */
12325 s = bfd_get_section_by_name (obfd, ".got");
12326 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12327 s = bfd_get_section_by_name (obfd, ".toc");
12328 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12329 s = bfd_get_section_by_name (obfd, ".tocbss");
12330 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12331 s = bfd_get_section_by_name (obfd, ".plt");
12332 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12333 {
12334 /* This may happen for
12335 o references to TOC base (SYM@toc / TOC[tc0]) without a
12336 .toc directive
12337 o bad linker script
12338 o --gc-sections and empty TOC sections
12339
12340 FIXME: Warn user? */
12341
12342 /* Look for a likely section. We probably won't even be
12343 using TOCstart. */
12344 for (s = obfd->sections; s != NULL; s = s->next)
12345 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12346 | SEC_EXCLUDE))
12347 == (SEC_ALLOC | SEC_SMALL_DATA))
12348 break;
12349 if (s == NULL)
12350 for (s = obfd->sections; s != NULL; s = s->next)
12351 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12352 == (SEC_ALLOC | SEC_SMALL_DATA))
12353 break;
12354 if (s == NULL)
12355 for (s = obfd->sections; s != NULL; s = s->next)
12356 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12357 == SEC_ALLOC)
12358 break;
12359 if (s == NULL)
12360 for (s = obfd->sections; s != NULL; s = s->next)
12361 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12362 break;
12363 }
12364
12365 TOCstart = 0;
12366 if (s != NULL)
12367 TOCstart = s->output_section->vma + s->output_offset;
12368
12369 _bfd_set_gp_value (obfd, TOCstart);
12370
12371 if (info != NULL && s != NULL && is_ppc64_elf (obfd))
12372 {
12373 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12374
12375 if (htab != NULL
12376 && htab->elf.hgot != NULL)
12377 {
12378 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
12379 htab->elf.hgot->root.u.def.section = s;
12380 }
12381 }
12382 return TOCstart;
12383 }
12384
12385 /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12386 write out any global entry stubs. */
12387
12388 static bfd_boolean
12389 build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12390 {
12391 struct bfd_link_info *info;
12392 struct ppc_link_hash_table *htab;
12393 struct plt_entry *pent;
12394 asection *s;
12395
12396 if (h->root.type == bfd_link_hash_indirect)
12397 return TRUE;
12398
12399 if (!h->pointer_equality_needed)
12400 return TRUE;
12401
12402 if (h->def_regular)
12403 return TRUE;
12404
12405 info = inf;
12406 htab = ppc_hash_table (info);
12407 if (htab == NULL)
12408 return FALSE;
12409
12410 s = htab->glink;
12411 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12412 if (pent->plt.offset != (bfd_vma) -1
12413 && pent->addend == 0)
12414 {
12415 bfd_byte *p;
12416 asection *plt;
12417 bfd_vma off;
12418
12419 p = s->contents + h->root.u.def.value;
12420 plt = htab->elf.splt;
12421 if (!htab->elf.dynamic_sections_created
12422 || h->dynindx == -1)
12423 plt = htab->elf.iplt;
12424 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12425 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12426
12427 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12428 {
12429 info->callbacks->einfo
12430 (_("%P: linkage table error against `%T'\n"),
12431 h->root.root.string);
12432 bfd_set_error (bfd_error_bad_value);
12433 htab->stub_error = TRUE;
12434 }
12435
12436 if (PPC_HA (off) != 0)
12437 {
12438 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12439 p += 4;
12440 }
12441 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12442 p += 4;
12443 bfd_put_32 (s->owner, MTCTR_R12, p);
12444 p += 4;
12445 bfd_put_32 (s->owner, BCTR, p);
12446 break;
12447 }
12448 return TRUE;
12449 }
12450
12451 /* Build all the stubs associated with the current output file.
12452 The stubs are kept in a hash table attached to the main linker
12453 hash table. This function is called via gldelf64ppc_finish. */
12454
12455 bfd_boolean
12456 ppc64_elf_build_stubs (struct bfd_link_info *info,
12457 char **stats)
12458 {
12459 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12460 asection *stub_sec;
12461 bfd_byte *p;
12462 int stub_sec_count = 0;
12463
12464 if (htab == NULL)
12465 return FALSE;
12466
12467 /* Allocate memory to hold the linker stubs. */
12468 for (stub_sec = htab->params->stub_bfd->sections;
12469 stub_sec != NULL;
12470 stub_sec = stub_sec->next)
12471 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12472 && stub_sec->size != 0)
12473 {
12474 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
12475 if (stub_sec->contents == NULL)
12476 return FALSE;
12477 /* We want to check that built size is the same as calculated
12478 size. rawsize is a convenient location to use. */
12479 stub_sec->rawsize = stub_sec->size;
12480 stub_sec->size = 0;
12481 }
12482
12483 if (htab->glink != NULL && htab->glink->size != 0)
12484 {
12485 unsigned int indx;
12486 bfd_vma plt0;
12487
12488 /* Build the .glink plt call stub. */
12489 if (htab->params->emit_stub_syms)
12490 {
12491 struct elf_link_hash_entry *h;
12492 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12493 TRUE, FALSE, FALSE);
12494 if (h == NULL)
12495 return FALSE;
12496 if (h->root.type == bfd_link_hash_new)
12497 {
12498 h->root.type = bfd_link_hash_defined;
12499 h->root.u.def.section = htab->glink;
12500 h->root.u.def.value = 8;
12501 h->ref_regular = 1;
12502 h->def_regular = 1;
12503 h->ref_regular_nonweak = 1;
12504 h->forced_local = 1;
12505 h->non_elf = 0;
12506 }
12507 }
12508 plt0 = (htab->elf.splt->output_section->vma
12509 + htab->elf.splt->output_offset
12510 - 16);
12511 if (info->emitrelocations)
12512 {
12513 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12514 if (r == NULL)
12515 return FALSE;
12516 r->r_offset = (htab->glink->output_offset
12517 + htab->glink->output_section->vma);
12518 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12519 r->r_addend = plt0;
12520 }
12521 p = htab->glink->contents;
12522 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12523 bfd_put_64 (htab->glink->owner, plt0, p);
12524 p += 8;
12525 if (htab->opd_abi)
12526 {
12527 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12528 p += 4;
12529 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12530 p += 4;
12531 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12532 p += 4;
12533 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12534 p += 4;
12535 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12536 p += 4;
12537 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12538 p += 4;
12539 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12540 p += 4;
12541 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
12542 p += 4;
12543 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12544 p += 4;
12545 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
12546 p += 4;
12547 }
12548 else
12549 {
12550 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
12551 p += 4;
12552 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12553 p += 4;
12554 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12555 p += 4;
12556 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
12557 p += 4;
12558 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
12559 p += 4;
12560 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
12561 p += 4;
12562 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
12563 p += 4;
12564 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
12565 p += 4;
12566 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
12567 p += 4;
12568 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
12569 p += 4;
12570 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
12571 p += 4;
12572 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
12573 p += 4;
12574 }
12575 bfd_put_32 (htab->glink->owner, BCTR, p);
12576 p += 4;
12577 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12578 {
12579 bfd_put_32 (htab->glink->owner, NOP, p);
12580 p += 4;
12581 }
12582
12583 /* Build the .glink lazy link call stubs. */
12584 indx = 0;
12585 while (p < htab->glink->contents + htab->glink->rawsize)
12586 {
12587 if (htab->opd_abi)
12588 {
12589 if (indx < 0x8000)
12590 {
12591 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12592 p += 4;
12593 }
12594 else
12595 {
12596 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12597 p += 4;
12598 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
12599 p);
12600 p += 4;
12601 }
12602 }
12603 bfd_put_32 (htab->glink->owner,
12604 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12605 indx++;
12606 p += 4;
12607 }
12608
12609 /* Build .glink global entry stubs. */
12610 if (htab->glink->size > htab->glink->rawsize)
12611 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
12612 }
12613
12614 if (htab->brlt->size != 0)
12615 {
12616 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12617 htab->brlt->size);
12618 if (htab->brlt->contents == NULL)
12619 return FALSE;
12620 }
12621 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12622 {
12623 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12624 htab->relbrlt->size);
12625 if (htab->relbrlt->contents == NULL)
12626 return FALSE;
12627 }
12628
12629 if (htab->glink_eh_frame != NULL
12630 && htab->glink_eh_frame->size != 0)
12631 {
12632 bfd_vma val;
12633 bfd_byte *last_fde;
12634 size_t last_fde_len, size, align, pad;
12635
12636 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12637 if (p == NULL)
12638 return FALSE;
12639 htab->glink_eh_frame->contents = p;
12640 last_fde = p;
12641
12642 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12643
12644 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12645 /* CIE length (rewrite in case little-endian). */
12646 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12647 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12648 p += sizeof (glink_eh_frame_cie);
12649
12650 for (stub_sec = htab->params->stub_bfd->sections;
12651 stub_sec != NULL;
12652 stub_sec = stub_sec->next)
12653 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12654 {
12655 last_fde = p;
12656 last_fde_len = 16;
12657 /* FDE length. */
12658 bfd_put_32 (htab->elf.dynobj, 16, p);
12659 p += 4;
12660 /* CIE pointer. */
12661 val = p - htab->glink_eh_frame->contents;
12662 bfd_put_32 (htab->elf.dynobj, val, p);
12663 p += 4;
12664 /* Offset to stub section. */
12665 val = (stub_sec->output_section->vma
12666 + stub_sec->output_offset);
12667 val -= (htab->glink_eh_frame->output_section->vma
12668 + htab->glink_eh_frame->output_offset);
12669 val -= p - htab->glink_eh_frame->contents;
12670 if (val + 0x80000000 > 0xffffffff)
12671 {
12672 info->callbacks->einfo
12673 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12674 stub_sec->name);
12675 return FALSE;
12676 }
12677 bfd_put_32 (htab->elf.dynobj, val, p);
12678 p += 4;
12679 /* stub section size. */
12680 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12681 p += 4;
12682 /* Augmentation. */
12683 p += 1;
12684 /* Pad. */
12685 p += 3;
12686 }
12687 if (htab->glink != NULL && htab->glink->size != 0)
12688 {
12689 last_fde = p;
12690 last_fde_len = 20;
12691 /* FDE length. */
12692 bfd_put_32 (htab->elf.dynobj, 20, p);
12693 p += 4;
12694 /* CIE pointer. */
12695 val = p - htab->glink_eh_frame->contents;
12696 bfd_put_32 (htab->elf.dynobj, val, p);
12697 p += 4;
12698 /* Offset to .glink. */
12699 val = (htab->glink->output_section->vma
12700 + htab->glink->output_offset
12701 + 8);
12702 val -= (htab->glink_eh_frame->output_section->vma
12703 + htab->glink_eh_frame->output_offset);
12704 val -= p - htab->glink_eh_frame->contents;
12705 if (val + 0x80000000 > 0xffffffff)
12706 {
12707 info->callbacks->einfo
12708 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12709 htab->glink->name);
12710 return FALSE;
12711 }
12712 bfd_put_32 (htab->elf.dynobj, val, p);
12713 p += 4;
12714 /* .glink size. */
12715 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12716 p += 4;
12717 /* Augmentation. */
12718 p += 1;
12719
12720 *p++ = DW_CFA_advance_loc + 1;
12721 *p++ = DW_CFA_register;
12722 *p++ = 65;
12723 *p++ = 12;
12724 *p++ = DW_CFA_advance_loc + 4;
12725 *p++ = DW_CFA_restore_extended;
12726 *p++ = 65;
12727 }
12728 /* Subsume any padding into the last FDE if user .eh_frame
12729 sections are aligned more than glink_eh_frame. Otherwise any
12730 zero padding will be seen as a terminator. */
12731 size = p - htab->glink_eh_frame->contents;
12732 align = 1;
12733 align <<= htab->glink_eh_frame->output_section->alignment_power;
12734 align -= 1;
12735 pad = ((size + align) & ~align) - size;
12736 htab->glink_eh_frame->size = size + pad;
12737 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12738 }
12739
12740 /* Build the stubs as directed by the stub hash table. */
12741 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12742
12743 if (htab->relbrlt != NULL)
12744 htab->relbrlt->reloc_count = 0;
12745
12746 if (htab->params->plt_stub_align != 0)
12747 for (stub_sec = htab->params->stub_bfd->sections;
12748 stub_sec != NULL;
12749 stub_sec = stub_sec->next)
12750 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12751 stub_sec->size = ((stub_sec->size
12752 + (1 << htab->params->plt_stub_align) - 1)
12753 & (-1 << htab->params->plt_stub_align));
12754
12755 for (stub_sec = htab->params->stub_bfd->sections;
12756 stub_sec != NULL;
12757 stub_sec = stub_sec->next)
12758 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12759 {
12760 stub_sec_count += 1;
12761 if (stub_sec->rawsize != stub_sec->size)
12762 break;
12763 }
12764
12765 if (stub_sec != NULL
12766 || (htab->glink_eh_frame != NULL
12767 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12768 {
12769 htab->stub_error = TRUE;
12770 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12771 }
12772
12773 if (htab->stub_error)
12774 return FALSE;
12775
12776 if (stats != NULL)
12777 {
12778 *stats = bfd_malloc (500);
12779 if (*stats == NULL)
12780 return FALSE;
12781
12782 sprintf (*stats, _("linker stubs in %u group%s\n"
12783 " branch %lu\n"
12784 " toc adjust %lu\n"
12785 " long branch %lu\n"
12786 " long toc adj %lu\n"
12787 " plt call %lu\n"
12788 " plt call toc %lu"),
12789 stub_sec_count,
12790 stub_sec_count == 1 ? "" : "s",
12791 htab->stub_count[ppc_stub_long_branch - 1],
12792 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12793 htab->stub_count[ppc_stub_plt_branch - 1],
12794 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12795 htab->stub_count[ppc_stub_plt_call - 1],
12796 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12797 }
12798 return TRUE;
12799 }
12800
12801 /* This function undoes the changes made by add_symbol_adjust. */
12802
12803 static bfd_boolean
12804 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12805 {
12806 struct ppc_link_hash_entry *eh;
12807
12808 if (h->root.type == bfd_link_hash_indirect)
12809 return TRUE;
12810
12811 eh = (struct ppc_link_hash_entry *) h;
12812 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12813 return TRUE;
12814
12815 eh->elf.root.type = bfd_link_hash_undefined;
12816 return TRUE;
12817 }
12818
12819 void
12820 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12821 {
12822 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12823
12824 if (htab != NULL)
12825 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12826 }
12827
12828 /* What to do when ld finds relocations against symbols defined in
12829 discarded sections. */
12830
12831 static unsigned int
12832 ppc64_elf_action_discarded (asection *sec)
12833 {
12834 if (strcmp (".opd", sec->name) == 0)
12835 return 0;
12836
12837 if (strcmp (".toc", sec->name) == 0)
12838 return 0;
12839
12840 if (strcmp (".toc1", sec->name) == 0)
12841 return 0;
12842
12843 return _bfd_elf_default_action_discarded (sec);
12844 }
12845
12846 /* The RELOCATE_SECTION function is called by the ELF backend linker
12847 to handle the relocations for a section.
12848
12849 The relocs are always passed as Rela structures; if the section
12850 actually uses Rel structures, the r_addend field will always be
12851 zero.
12852
12853 This function is responsible for adjust the section contents as
12854 necessary, and (if using Rela relocs and generating a
12855 relocatable output file) adjusting the reloc addend as
12856 necessary.
12857
12858 This function does not have to worry about setting the reloc
12859 address or the reloc symbol index.
12860
12861 LOCAL_SYMS is a pointer to the swapped in local symbols.
12862
12863 LOCAL_SECTIONS is an array giving the section in the input file
12864 corresponding to the st_shndx field of each local symbol.
12865
12866 The global hash table entry for the global symbols can be found
12867 via elf_sym_hashes (input_bfd).
12868
12869 When generating relocatable output, this function must handle
12870 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12871 going to be the section symbol corresponding to the output
12872 section, which means that the addend must be adjusted
12873 accordingly. */
12874
12875 static bfd_boolean
12876 ppc64_elf_relocate_section (bfd *output_bfd,
12877 struct bfd_link_info *info,
12878 bfd *input_bfd,
12879 asection *input_section,
12880 bfd_byte *contents,
12881 Elf_Internal_Rela *relocs,
12882 Elf_Internal_Sym *local_syms,
12883 asection **local_sections)
12884 {
12885 struct ppc_link_hash_table *htab;
12886 Elf_Internal_Shdr *symtab_hdr;
12887 struct elf_link_hash_entry **sym_hashes;
12888 Elf_Internal_Rela *rel;
12889 Elf_Internal_Rela *relend;
12890 Elf_Internal_Rela outrel;
12891 bfd_byte *loc;
12892 struct got_entry **local_got_ents;
12893 bfd_vma TOCstart;
12894 bfd_boolean ret = TRUE;
12895 bfd_boolean is_opd;
12896 /* Assume 'at' branch hints. */
12897 bfd_boolean is_isa_v2 = TRUE;
12898 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12899
12900 /* Initialize howto table if needed. */
12901 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12902 ppc_howto_init ();
12903
12904 htab = ppc_hash_table (info);
12905 if (htab == NULL)
12906 return FALSE;
12907
12908 /* Don't relocate stub sections. */
12909 if (input_section->owner == htab->params->stub_bfd)
12910 return TRUE;
12911
12912 BFD_ASSERT (is_ppc64_elf (input_bfd));
12913
12914 local_got_ents = elf_local_got_ents (input_bfd);
12915 TOCstart = elf_gp (output_bfd);
12916 symtab_hdr = &elf_symtab_hdr (input_bfd);
12917 sym_hashes = elf_sym_hashes (input_bfd);
12918 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12919
12920 rel = relocs;
12921 relend = relocs + input_section->reloc_count;
12922 for (; rel < relend; rel++)
12923 {
12924 enum elf_ppc64_reloc_type r_type;
12925 bfd_vma addend;
12926 bfd_reloc_status_type r;
12927 Elf_Internal_Sym *sym;
12928 asection *sec;
12929 struct elf_link_hash_entry *h_elf;
12930 struct ppc_link_hash_entry *h;
12931 struct ppc_link_hash_entry *fdh;
12932 const char *sym_name;
12933 unsigned long r_symndx, toc_symndx;
12934 bfd_vma toc_addend;
12935 unsigned char tls_mask, tls_gd, tls_type;
12936 unsigned char sym_type;
12937 bfd_vma relocation;
12938 bfd_boolean unresolved_reloc;
12939 bfd_boolean warned;
12940 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12941 unsigned int insn;
12942 unsigned int mask;
12943 struct ppc_stub_hash_entry *stub_entry;
12944 bfd_vma max_br_offset;
12945 bfd_vma from;
12946 const Elf_Internal_Rela orig_rel = *rel;
12947
12948 r_type = ELF64_R_TYPE (rel->r_info);
12949 r_symndx = ELF64_R_SYM (rel->r_info);
12950
12951 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12952 symbol of the previous ADDR64 reloc. The symbol gives us the
12953 proper TOC base to use. */
12954 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12955 && rel != relocs
12956 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12957 && is_opd)
12958 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12959
12960 sym = NULL;
12961 sec = NULL;
12962 h_elf = NULL;
12963 sym_name = NULL;
12964 unresolved_reloc = FALSE;
12965 warned = FALSE;
12966
12967 if (r_symndx < symtab_hdr->sh_info)
12968 {
12969 /* It's a local symbol. */
12970 struct _opd_sec_data *opd;
12971
12972 sym = local_syms + r_symndx;
12973 sec = local_sections[r_symndx];
12974 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12975 sym_type = ELF64_ST_TYPE (sym->st_info);
12976 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12977 opd = get_opd_info (sec);
12978 if (opd != NULL && opd->adjust != NULL)
12979 {
12980 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12981 if (adjust == -1)
12982 relocation = 0;
12983 else
12984 {
12985 /* If this is a relocation against the opd section sym
12986 and we have edited .opd, adjust the reloc addend so
12987 that ld -r and ld --emit-relocs output is correct.
12988 If it is a reloc against some other .opd symbol,
12989 then the symbol value will be adjusted later. */
12990 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12991 rel->r_addend += adjust;
12992 else
12993 relocation += adjust;
12994 }
12995 }
12996 }
12997 else
12998 {
12999 bfd_boolean ignored;
13000
13001 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13002 r_symndx, symtab_hdr, sym_hashes,
13003 h_elf, sec, relocation,
13004 unresolved_reloc, warned, ignored);
13005 sym_name = h_elf->root.root.string;
13006 sym_type = h_elf->type;
13007 if (sec != NULL
13008 && sec->owner == output_bfd
13009 && strcmp (sec->name, ".opd") == 0)
13010 {
13011 /* This is a symbol defined in a linker script. All
13012 such are defined in output sections, even those
13013 defined by simple assignment from a symbol defined in
13014 an input section. Transfer the symbol to an
13015 appropriate input .opd section, so that a branch to
13016 this symbol will be mapped to the location specified
13017 by the opd entry. */
13018 struct bfd_link_order *lo;
13019 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13020 if (lo->type == bfd_indirect_link_order)
13021 {
13022 asection *isec = lo->u.indirect.section;
13023 if (h_elf->root.u.def.value >= isec->output_offset
13024 && h_elf->root.u.def.value < (isec->output_offset
13025 + isec->size))
13026 {
13027 h_elf->root.u.def.value -= isec->output_offset;
13028 h_elf->root.u.def.section = isec;
13029 sec = isec;
13030 break;
13031 }
13032 }
13033 }
13034 }
13035 h = (struct ppc_link_hash_entry *) h_elf;
13036
13037 if (sec != NULL && discarded_section (sec))
13038 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
13039 rel, 1, relend,
13040 ppc64_elf_howto_table[r_type], 0,
13041 contents);
13042
13043 if (info->relocatable)
13044 continue;
13045
13046 if (h != NULL && &h->elf == htab->elf.hgot)
13047 {
13048 relocation = (TOCstart
13049 + htab->stub_group[input_section->id].toc_off);
13050 sec = bfd_abs_section_ptr;
13051 unresolved_reloc = FALSE;
13052 }
13053
13054 /* TLS optimizations. Replace instruction sequences and relocs
13055 based on information we collected in tls_optimize. We edit
13056 RELOCS so that --emit-relocs will output something sensible
13057 for the final instruction stream. */
13058 tls_mask = 0;
13059 tls_gd = 0;
13060 toc_symndx = 0;
13061 if (h != NULL)
13062 tls_mask = h->tls_mask;
13063 else if (local_got_ents != NULL)
13064 {
13065 struct plt_entry **local_plt = (struct plt_entry **)
13066 (local_got_ents + symtab_hdr->sh_info);
13067 unsigned char *lgot_masks = (unsigned char *)
13068 (local_plt + symtab_hdr->sh_info);
13069 tls_mask = lgot_masks[r_symndx];
13070 }
13071 if (tls_mask == 0
13072 && (r_type == R_PPC64_TLS
13073 || r_type == R_PPC64_TLSGD
13074 || r_type == R_PPC64_TLSLD))
13075 {
13076 /* Check for toc tls entries. */
13077 unsigned char *toc_tls;
13078
13079 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13080 &local_syms, rel, input_bfd))
13081 return FALSE;
13082
13083 if (toc_tls)
13084 tls_mask = *toc_tls;
13085 }
13086
13087 /* Check that tls relocs are used with tls syms, and non-tls
13088 relocs are used with non-tls syms. */
13089 if (r_symndx != STN_UNDEF
13090 && r_type != R_PPC64_NONE
13091 && (h == NULL
13092 || h->elf.root.type == bfd_link_hash_defined
13093 || h->elf.root.type == bfd_link_hash_defweak)
13094 && (IS_PPC64_TLS_RELOC (r_type)
13095 != (sym_type == STT_TLS
13096 || (sym_type == STT_SECTION
13097 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13098 {
13099 if (tls_mask != 0
13100 && (r_type == R_PPC64_TLS
13101 || r_type == R_PPC64_TLSGD
13102 || r_type == R_PPC64_TLSLD))
13103 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13104 ;
13105 else
13106 info->callbacks->einfo
13107 (!IS_PPC64_TLS_RELOC (r_type)
13108 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13109 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13110 input_bfd, input_section, rel->r_offset,
13111 ppc64_elf_howto_table[r_type]->name,
13112 sym_name);
13113 }
13114
13115 /* Ensure reloc mapping code below stays sane. */
13116 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13117 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13118 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13119 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13120 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13121 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13122 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13123 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13124 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13125 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13126 abort ();
13127
13128 switch (r_type)
13129 {
13130 default:
13131 break;
13132
13133 case R_PPC64_LO_DS_OPT:
13134 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13135 if ((insn & (0x3f << 26)) != 58u << 26)
13136 abort ();
13137 insn += (14u << 26) - (58u << 26);
13138 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13139 r_type = R_PPC64_TOC16_LO;
13140 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13141 break;
13142
13143 case R_PPC64_TOC16:
13144 case R_PPC64_TOC16_LO:
13145 case R_PPC64_TOC16_DS:
13146 case R_PPC64_TOC16_LO_DS:
13147 {
13148 /* Check for toc tls entries. */
13149 unsigned char *toc_tls;
13150 int retval;
13151
13152 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13153 &local_syms, rel, input_bfd);
13154 if (retval == 0)
13155 return FALSE;
13156
13157 if (toc_tls)
13158 {
13159 tls_mask = *toc_tls;
13160 if (r_type == R_PPC64_TOC16_DS
13161 || r_type == R_PPC64_TOC16_LO_DS)
13162 {
13163 if (tls_mask != 0
13164 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13165 goto toctprel;
13166 }
13167 else
13168 {
13169 /* If we found a GD reloc pair, then we might be
13170 doing a GD->IE transition. */
13171 if (retval == 2)
13172 {
13173 tls_gd = TLS_TPRELGD;
13174 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13175 goto tls_ldgd_opt;
13176 }
13177 else if (retval == 3)
13178 {
13179 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13180 goto tls_ldgd_opt;
13181 }
13182 }
13183 }
13184 }
13185 break;
13186
13187 case R_PPC64_GOT_TPREL16_HI:
13188 case R_PPC64_GOT_TPREL16_HA:
13189 if (tls_mask != 0
13190 && (tls_mask & TLS_TPREL) == 0)
13191 {
13192 rel->r_offset -= d_offset;
13193 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13194 r_type = R_PPC64_NONE;
13195 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13196 }
13197 break;
13198
13199 case R_PPC64_GOT_TPREL16_DS:
13200 case R_PPC64_GOT_TPREL16_LO_DS:
13201 if (tls_mask != 0
13202 && (tls_mask & TLS_TPREL) == 0)
13203 {
13204 toctprel:
13205 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
13206 insn &= 31 << 21;
13207 insn |= 0x3c0d0000; /* addis 0,13,0 */
13208 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
13209 r_type = R_PPC64_TPREL16_HA;
13210 if (toc_symndx != 0)
13211 {
13212 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13213 rel->r_addend = toc_addend;
13214 /* We changed the symbol. Start over in order to
13215 get h, sym, sec etc. right. */
13216 rel--;
13217 continue;
13218 }
13219 else
13220 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13221 }
13222 break;
13223
13224 case R_PPC64_TLS:
13225 if (tls_mask != 0
13226 && (tls_mask & TLS_TPREL) == 0)
13227 {
13228 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
13229 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13230 if (insn == 0)
13231 abort ();
13232 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13233 /* Was PPC64_TLS which sits on insn boundary, now
13234 PPC64_TPREL16_LO which is at low-order half-word. */
13235 rel->r_offset += d_offset;
13236 r_type = R_PPC64_TPREL16_LO;
13237 if (toc_symndx != 0)
13238 {
13239 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13240 rel->r_addend = toc_addend;
13241 /* We changed the symbol. Start over in order to
13242 get h, sym, sec etc. right. */
13243 rel--;
13244 continue;
13245 }
13246 else
13247 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13248 }
13249 break;
13250
13251 case R_PPC64_GOT_TLSGD16_HI:
13252 case R_PPC64_GOT_TLSGD16_HA:
13253 tls_gd = TLS_TPRELGD;
13254 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13255 goto tls_gdld_hi;
13256 break;
13257
13258 case R_PPC64_GOT_TLSLD16_HI:
13259 case R_PPC64_GOT_TLSLD16_HA:
13260 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13261 {
13262 tls_gdld_hi:
13263 if ((tls_mask & tls_gd) != 0)
13264 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13265 + R_PPC64_GOT_TPREL16_DS);
13266 else
13267 {
13268 rel->r_offset -= d_offset;
13269 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13270 r_type = R_PPC64_NONE;
13271 }
13272 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13273 }
13274 break;
13275
13276 case R_PPC64_GOT_TLSGD16:
13277 case R_PPC64_GOT_TLSGD16_LO:
13278 tls_gd = TLS_TPRELGD;
13279 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13280 goto tls_ldgd_opt;
13281 break;
13282
13283 case R_PPC64_GOT_TLSLD16:
13284 case R_PPC64_GOT_TLSLD16_LO:
13285 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13286 {
13287 unsigned int insn1, insn2, insn3;
13288 bfd_vma offset;
13289
13290 tls_ldgd_opt:
13291 offset = (bfd_vma) -1;
13292 /* If not using the newer R_PPC64_TLSGD/LD to mark
13293 __tls_get_addr calls, we must trust that the call
13294 stays with its arg setup insns, ie. that the next
13295 reloc is the __tls_get_addr call associated with
13296 the current reloc. Edit both insns. */
13297 if (input_section->has_tls_get_addr_call
13298 && rel + 1 < relend
13299 && branch_reloc_hash_match (input_bfd, rel + 1,
13300 htab->tls_get_addr,
13301 htab->tls_get_addr_fd))
13302 offset = rel[1].r_offset;
13303 if ((tls_mask & tls_gd) != 0)
13304 {
13305 /* IE */
13306 insn1 = bfd_get_32 (output_bfd,
13307 contents + rel->r_offset - d_offset);
13308 insn1 &= (1 << 26) - (1 << 2);
13309 insn1 |= 58 << 26; /* ld */
13310 insn2 = 0x7c636a14; /* add 3,3,13 */
13311 if (offset != (bfd_vma) -1)
13312 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13313 if ((tls_mask & TLS_EXPLICIT) == 0)
13314 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13315 + R_PPC64_GOT_TPREL16_DS);
13316 else
13317 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13318 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13319 }
13320 else
13321 {
13322 /* LE */
13323 insn1 = 0x3c6d0000; /* addis 3,13,0 */
13324 insn2 = 0x38630000; /* addi 3,3,0 */
13325 if (tls_gd == 0)
13326 {
13327 /* Was an LD reloc. */
13328 if (toc_symndx)
13329 sec = local_sections[toc_symndx];
13330 for (r_symndx = 0;
13331 r_symndx < symtab_hdr->sh_info;
13332 r_symndx++)
13333 if (local_sections[r_symndx] == sec)
13334 break;
13335 if (r_symndx >= symtab_hdr->sh_info)
13336 r_symndx = STN_UNDEF;
13337 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13338 if (r_symndx != STN_UNDEF)
13339 rel->r_addend -= (local_syms[r_symndx].st_value
13340 + sec->output_offset
13341 + sec->output_section->vma);
13342 }
13343 else if (toc_symndx != 0)
13344 {
13345 r_symndx = toc_symndx;
13346 rel->r_addend = toc_addend;
13347 }
13348 r_type = R_PPC64_TPREL16_HA;
13349 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13350 if (offset != (bfd_vma) -1)
13351 {
13352 rel[1].r_info = ELF64_R_INFO (r_symndx,
13353 R_PPC64_TPREL16_LO);
13354 rel[1].r_offset = offset + d_offset;
13355 rel[1].r_addend = rel->r_addend;
13356 }
13357 }
13358 bfd_put_32 (output_bfd, insn1,
13359 contents + rel->r_offset - d_offset);
13360 if (offset != (bfd_vma) -1)
13361 {
13362 insn3 = bfd_get_32 (output_bfd,
13363 contents + offset + 4);
13364 if (insn3 == NOP
13365 || insn3 == CROR_151515 || insn3 == CROR_313131)
13366 {
13367 rel[1].r_offset += 4;
13368 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13369 insn2 = NOP;
13370 }
13371 bfd_put_32 (output_bfd, insn2, contents + offset);
13372 }
13373 if ((tls_mask & tls_gd) == 0
13374 && (tls_gd == 0 || toc_symndx != 0))
13375 {
13376 /* We changed the symbol. Start over in order
13377 to get h, sym, sec etc. right. */
13378 rel--;
13379 continue;
13380 }
13381 }
13382 break;
13383
13384 case R_PPC64_TLSGD:
13385 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13386 {
13387 unsigned int insn2, insn3;
13388 bfd_vma offset = rel->r_offset;
13389
13390 if ((tls_mask & TLS_TPRELGD) != 0)
13391 {
13392 /* IE */
13393 r_type = R_PPC64_NONE;
13394 insn2 = 0x7c636a14; /* add 3,3,13 */
13395 }
13396 else
13397 {
13398 /* LE */
13399 if (toc_symndx != 0)
13400 {
13401 r_symndx = toc_symndx;
13402 rel->r_addend = toc_addend;
13403 }
13404 r_type = R_PPC64_TPREL16_LO;
13405 rel->r_offset = offset + d_offset;
13406 insn2 = 0x38630000; /* addi 3,3,0 */
13407 }
13408 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13409 /* Zap the reloc on the _tls_get_addr call too. */
13410 BFD_ASSERT (offset == rel[1].r_offset);
13411 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13412 insn3 = bfd_get_32 (output_bfd,
13413 contents + offset + 4);
13414 if (insn3 == NOP
13415 || insn3 == CROR_151515 || insn3 == CROR_313131)
13416 {
13417 rel->r_offset += 4;
13418 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13419 insn2 = NOP;
13420 }
13421 bfd_put_32 (output_bfd, insn2, contents + offset);
13422 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13423 {
13424 rel--;
13425 continue;
13426 }
13427 }
13428 break;
13429
13430 case R_PPC64_TLSLD:
13431 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13432 {
13433 unsigned int insn2, insn3;
13434 bfd_vma offset = rel->r_offset;
13435
13436 if (toc_symndx)
13437 sec = local_sections[toc_symndx];
13438 for (r_symndx = 0;
13439 r_symndx < symtab_hdr->sh_info;
13440 r_symndx++)
13441 if (local_sections[r_symndx] == sec)
13442 break;
13443 if (r_symndx >= symtab_hdr->sh_info)
13444 r_symndx = STN_UNDEF;
13445 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13446 if (r_symndx != STN_UNDEF)
13447 rel->r_addend -= (local_syms[r_symndx].st_value
13448 + sec->output_offset
13449 + sec->output_section->vma);
13450
13451 r_type = R_PPC64_TPREL16_LO;
13452 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13453 rel->r_offset = offset + d_offset;
13454 /* Zap the reloc on the _tls_get_addr call too. */
13455 BFD_ASSERT (offset == rel[1].r_offset);
13456 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13457 insn2 = 0x38630000; /* addi 3,3,0 */
13458 insn3 = bfd_get_32 (output_bfd,
13459 contents + offset + 4);
13460 if (insn3 == NOP
13461 || insn3 == CROR_151515 || insn3 == CROR_313131)
13462 {
13463 rel->r_offset += 4;
13464 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13465 insn2 = NOP;
13466 }
13467 bfd_put_32 (output_bfd, insn2, contents + offset);
13468 rel--;
13469 continue;
13470 }
13471 break;
13472
13473 case R_PPC64_DTPMOD64:
13474 if (rel + 1 < relend
13475 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13476 && rel[1].r_offset == rel->r_offset + 8)
13477 {
13478 if ((tls_mask & TLS_GD) == 0)
13479 {
13480 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13481 if ((tls_mask & TLS_TPRELGD) != 0)
13482 r_type = R_PPC64_TPREL64;
13483 else
13484 {
13485 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13486 r_type = R_PPC64_NONE;
13487 }
13488 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13489 }
13490 }
13491 else
13492 {
13493 if ((tls_mask & TLS_LD) == 0)
13494 {
13495 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13496 r_type = R_PPC64_NONE;
13497 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13498 }
13499 }
13500 break;
13501
13502 case R_PPC64_TPREL64:
13503 if ((tls_mask & TLS_TPREL) == 0)
13504 {
13505 r_type = R_PPC64_NONE;
13506 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13507 }
13508 break;
13509
13510 case R_PPC64_REL16_HA:
13511 /* If we are generating a non-PIC executable, edit
13512 . 0: addis 2,12,.TOC.-0b@ha
13513 . addi 2,2,.TOC.-0b@l
13514 used by ELFv2 global entry points to set up r2, to
13515 . lis 2,.TOC.@ha
13516 . addi 2,2,.TOC.@l
13517 if .TOC. is in range. */
13518 if (!info->shared
13519 && h != NULL && &h->elf == htab->elf.hgot
13520 && rel + 1 < relend
13521 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
13522 && rel[1].r_offset == rel->r_offset + 4
13523 && rel[1].r_addend == rel->r_addend + 4
13524 && relocation + 0x80008000 <= 0xffffffff)
13525 {
13526 unsigned int insn1, insn2;
13527 bfd_vma offset = rel->r_offset - d_offset;
13528 insn1 = bfd_get_32 (output_bfd, contents + offset);
13529 insn2 = bfd_get_32 (output_bfd, contents + offset + 4);
13530 if ((insn1 & 0xffff0000) == 0x3c4c0000 /* addis 2,12 */
13531 && (insn2 & 0xffff0000) == 0x38420000 /* addi 2,2 */)
13532 {
13533 r_type = R_PPC64_ADDR16_HA;
13534 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13535 rel->r_addend -= d_offset;
13536 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
13537 rel[1].r_addend -= d_offset + 4;
13538 bfd_put_32 (output_bfd, 0x3c400000, contents + offset);
13539 }
13540 }
13541 break;
13542 }
13543
13544 /* Handle other relocations that tweak non-addend part of insn. */
13545 insn = 0;
13546 max_br_offset = 1 << 25;
13547 addend = rel->r_addend;
13548 reloc_dest = DEST_NORMAL;
13549 switch (r_type)
13550 {
13551 default:
13552 break;
13553
13554 case R_PPC64_TOCSAVE:
13555 if (relocation + addend == (rel->r_offset
13556 + input_section->output_offset
13557 + input_section->output_section->vma)
13558 && tocsave_find (htab, NO_INSERT,
13559 &local_syms, rel, input_bfd))
13560 {
13561 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13562 if (insn == NOP
13563 || insn == CROR_151515 || insn == CROR_313131)
13564 bfd_put_32 (input_bfd,
13565 STD_R2_0R1 + STK_TOC (htab),
13566 contents + rel->r_offset);
13567 }
13568 break;
13569
13570 /* Branch taken prediction relocations. */
13571 case R_PPC64_ADDR14_BRTAKEN:
13572 case R_PPC64_REL14_BRTAKEN:
13573 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13574 /* Fall thru. */
13575
13576 /* Branch not taken prediction relocations. */
13577 case R_PPC64_ADDR14_BRNTAKEN:
13578 case R_PPC64_REL14_BRNTAKEN:
13579 insn |= bfd_get_32 (output_bfd,
13580 contents + rel->r_offset) & ~(0x01 << 21);
13581 /* Fall thru. */
13582
13583 case R_PPC64_REL14:
13584 max_br_offset = 1 << 15;
13585 /* Fall thru. */
13586
13587 case R_PPC64_REL24:
13588 /* Calls to functions with a different TOC, such as calls to
13589 shared objects, need to alter the TOC pointer. This is
13590 done using a linkage stub. A REL24 branching to these
13591 linkage stubs needs to be followed by a nop, as the nop
13592 will be replaced with an instruction to restore the TOC
13593 base pointer. */
13594 fdh = h;
13595 if (h != NULL
13596 && h->oh != NULL
13597 && h->oh->is_func_descriptor)
13598 fdh = ppc_follow_link (h->oh);
13599 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13600 htab);
13601 if (stub_entry != NULL
13602 && (stub_entry->stub_type == ppc_stub_plt_call
13603 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13604 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13605 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13606 {
13607 bfd_boolean can_plt_call = FALSE;
13608
13609 /* All of these stubs will modify r2, so there must be a
13610 branch and link followed by a nop. The nop is
13611 replaced by an insn to restore r2. */
13612 if (rel->r_offset + 8 <= input_section->size)
13613 {
13614 unsigned long br;
13615
13616 br = bfd_get_32 (input_bfd,
13617 contents + rel->r_offset);
13618 if ((br & 1) != 0)
13619 {
13620 unsigned long nop;
13621
13622 nop = bfd_get_32 (input_bfd,
13623 contents + rel->r_offset + 4);
13624 if (nop == NOP
13625 || nop == CROR_151515 || nop == CROR_313131)
13626 {
13627 if (h != NULL
13628 && (h == htab->tls_get_addr_fd
13629 || h == htab->tls_get_addr)
13630 && !htab->params->no_tls_get_addr_opt)
13631 {
13632 /* Special stub used, leave nop alone. */
13633 }
13634 else
13635 bfd_put_32 (input_bfd,
13636 LD_R2_0R1 + STK_TOC (htab),
13637 contents + rel->r_offset + 4);
13638 can_plt_call = TRUE;
13639 }
13640 }
13641 }
13642
13643 if (!can_plt_call && h != NULL)
13644 {
13645 const char *name = h->elf.root.root.string;
13646
13647 if (*name == '.')
13648 ++name;
13649
13650 if (strncmp (name, "__libc_start_main", 17) == 0
13651 && (name[17] == 0 || name[17] == '@'))
13652 {
13653 /* Allow crt1 branch to go via a toc adjusting
13654 stub. Other calls that never return could do
13655 the same, if we could detect such. */
13656 can_plt_call = TRUE;
13657 }
13658 }
13659
13660 if (!can_plt_call)
13661 {
13662 /* g++ as of 20130507 emits self-calls without a
13663 following nop. This is arguably wrong since we
13664 have conflicting information. On the one hand a
13665 global symbol and on the other a local call
13666 sequence, but don't error for this special case.
13667 It isn't possible to cheaply verify we have
13668 exactly such a call. Allow all calls to the same
13669 section. */
13670 asection *code_sec = sec;
13671
13672 if (get_opd_info (sec) != NULL)
13673 {
13674 bfd_vma off = (relocation + addend
13675 - sec->output_section->vma
13676 - sec->output_offset);
13677
13678 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
13679 }
13680 if (code_sec == input_section)
13681 can_plt_call = TRUE;
13682 }
13683
13684 if (!can_plt_call)
13685 {
13686 info->callbacks->einfo
13687 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13688 "recompile with -fPIC\n"),
13689 input_bfd, input_section, rel->r_offset, sym_name);
13690
13691 bfd_set_error (bfd_error_bad_value);
13692 ret = FALSE;
13693 }
13694
13695 if (can_plt_call
13696 && (stub_entry->stub_type == ppc_stub_plt_call
13697 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13698 unresolved_reloc = FALSE;
13699 }
13700
13701 if ((stub_entry == NULL
13702 || stub_entry->stub_type == ppc_stub_long_branch
13703 || stub_entry->stub_type == ppc_stub_plt_branch)
13704 && get_opd_info (sec) != NULL)
13705 {
13706 /* The branch destination is the value of the opd entry. */
13707 bfd_vma off = (relocation + addend
13708 - sec->output_section->vma
13709 - sec->output_offset);
13710 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13711 if (dest != (bfd_vma) -1)
13712 {
13713 relocation = dest;
13714 addend = 0;
13715 reloc_dest = DEST_OPD;
13716 }
13717 }
13718
13719 /* If the branch is out of reach we ought to have a long
13720 branch stub. */
13721 from = (rel->r_offset
13722 + input_section->output_offset
13723 + input_section->output_section->vma);
13724
13725 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
13726 ? fdh->elf.other
13727 : sym->st_other);
13728
13729 if (stub_entry != NULL
13730 && (stub_entry->stub_type == ppc_stub_long_branch
13731 || stub_entry->stub_type == ppc_stub_plt_branch)
13732 && (r_type == R_PPC64_ADDR14_BRTAKEN
13733 || r_type == R_PPC64_ADDR14_BRNTAKEN
13734 || (relocation + addend - from + max_br_offset
13735 < 2 * max_br_offset)))
13736 /* Don't use the stub if this branch is in range. */
13737 stub_entry = NULL;
13738
13739 if (stub_entry != NULL)
13740 {
13741 /* Munge up the value and addend so that we call the stub
13742 rather than the procedure directly. */
13743 relocation = (stub_entry->stub_offset
13744 + stub_entry->stub_sec->output_offset
13745 + stub_entry->stub_sec->output_section->vma);
13746 addend = 0;
13747 reloc_dest = DEST_STUB;
13748
13749 if ((stub_entry->stub_type == ppc_stub_plt_call
13750 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13751 && (ALWAYS_EMIT_R2SAVE
13752 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13753 && rel + 1 < relend
13754 && rel[1].r_offset == rel->r_offset + 4
13755 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13756 relocation += 4;
13757 }
13758
13759 if (insn != 0)
13760 {
13761 if (is_isa_v2)
13762 {
13763 /* Set 'a' bit. This is 0b00010 in BO field for branch
13764 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13765 for branch on CTR insns (BO == 1a00t or 1a01t). */
13766 if ((insn & (0x14 << 21)) == (0x04 << 21))
13767 insn |= 0x02 << 21;
13768 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13769 insn |= 0x08 << 21;
13770 else
13771 break;
13772 }
13773 else
13774 {
13775 /* Invert 'y' bit if not the default. */
13776 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13777 insn ^= 0x01 << 21;
13778 }
13779
13780 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13781 }
13782
13783 /* NOP out calls to undefined weak functions.
13784 We can thus call a weak function without first
13785 checking whether the function is defined. */
13786 else if (h != NULL
13787 && h->elf.root.type == bfd_link_hash_undefweak
13788 && h->elf.dynindx == -1
13789 && r_type == R_PPC64_REL24
13790 && relocation == 0
13791 && addend == 0)
13792 {
13793 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13794 continue;
13795 }
13796 break;
13797 }
13798
13799 /* Set `addend'. */
13800 tls_type = 0;
13801 switch (r_type)
13802 {
13803 default:
13804 info->callbacks->einfo
13805 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13806 input_bfd, (int) r_type, sym_name);
13807
13808 bfd_set_error (bfd_error_bad_value);
13809 ret = FALSE;
13810 continue;
13811
13812 case R_PPC64_NONE:
13813 case R_PPC64_TLS:
13814 case R_PPC64_TLSGD:
13815 case R_PPC64_TLSLD:
13816 case R_PPC64_TOCSAVE:
13817 case R_PPC64_GNU_VTINHERIT:
13818 case R_PPC64_GNU_VTENTRY:
13819 continue;
13820
13821 /* GOT16 relocations. Like an ADDR16 using the symbol's
13822 address in the GOT as relocation value instead of the
13823 symbol's value itself. Also, create a GOT entry for the
13824 symbol and put the symbol value there. */
13825 case R_PPC64_GOT_TLSGD16:
13826 case R_PPC64_GOT_TLSGD16_LO:
13827 case R_PPC64_GOT_TLSGD16_HI:
13828 case R_PPC64_GOT_TLSGD16_HA:
13829 tls_type = TLS_TLS | TLS_GD;
13830 goto dogot;
13831
13832 case R_PPC64_GOT_TLSLD16:
13833 case R_PPC64_GOT_TLSLD16_LO:
13834 case R_PPC64_GOT_TLSLD16_HI:
13835 case R_PPC64_GOT_TLSLD16_HA:
13836 tls_type = TLS_TLS | TLS_LD;
13837 goto dogot;
13838
13839 case R_PPC64_GOT_TPREL16_DS:
13840 case R_PPC64_GOT_TPREL16_LO_DS:
13841 case R_PPC64_GOT_TPREL16_HI:
13842 case R_PPC64_GOT_TPREL16_HA:
13843 tls_type = TLS_TLS | TLS_TPREL;
13844 goto dogot;
13845
13846 case R_PPC64_GOT_DTPREL16_DS:
13847 case R_PPC64_GOT_DTPREL16_LO_DS:
13848 case R_PPC64_GOT_DTPREL16_HI:
13849 case R_PPC64_GOT_DTPREL16_HA:
13850 tls_type = TLS_TLS | TLS_DTPREL;
13851 goto dogot;
13852
13853 case R_PPC64_GOT16:
13854 case R_PPC64_GOT16_LO:
13855 case R_PPC64_GOT16_HI:
13856 case R_PPC64_GOT16_HA:
13857 case R_PPC64_GOT16_DS:
13858 case R_PPC64_GOT16_LO_DS:
13859 dogot:
13860 {
13861 /* Relocation is to the entry for this symbol in the global
13862 offset table. */
13863 asection *got;
13864 bfd_vma *offp;
13865 bfd_vma off;
13866 unsigned long indx = 0;
13867 struct got_entry *ent;
13868
13869 if (tls_type == (TLS_TLS | TLS_LD)
13870 && (h == NULL
13871 || !h->elf.def_dynamic))
13872 ent = ppc64_tlsld_got (input_bfd);
13873 else
13874 {
13875
13876 if (h != NULL)
13877 {
13878 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13879 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13880 &h->elf)
13881 || (info->shared
13882 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
13883 /* This is actually a static link, or it is a
13884 -Bsymbolic link and the symbol is defined
13885 locally, or the symbol was forced to be local
13886 because of a version file. */
13887 ;
13888 else
13889 {
13890 BFD_ASSERT (h->elf.dynindx != -1);
13891 indx = h->elf.dynindx;
13892 unresolved_reloc = FALSE;
13893 }
13894 ent = h->elf.got.glist;
13895 }
13896 else
13897 {
13898 if (local_got_ents == NULL)
13899 abort ();
13900 ent = local_got_ents[r_symndx];
13901 }
13902
13903 for (; ent != NULL; ent = ent->next)
13904 if (ent->addend == orig_rel.r_addend
13905 && ent->owner == input_bfd
13906 && ent->tls_type == tls_type)
13907 break;
13908 }
13909
13910 if (ent == NULL)
13911 abort ();
13912 if (ent->is_indirect)
13913 ent = ent->got.ent;
13914 offp = &ent->got.offset;
13915 got = ppc64_elf_tdata (ent->owner)->got;
13916 if (got == NULL)
13917 abort ();
13918
13919 /* The offset must always be a multiple of 8. We use the
13920 least significant bit to record whether we have already
13921 processed this entry. */
13922 off = *offp;
13923 if ((off & 1) != 0)
13924 off &= ~1;
13925 else
13926 {
13927 /* Generate relocs for the dynamic linker, except in
13928 the case of TLSLD where we'll use one entry per
13929 module. */
13930 asection *relgot;
13931 bfd_boolean ifunc;
13932
13933 *offp = off | 1;
13934 relgot = NULL;
13935 ifunc = (h != NULL
13936 ? h->elf.type == STT_GNU_IFUNC
13937 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13938 if (ifunc)
13939 relgot = htab->elf.irelplt;
13940 else if ((info->shared || indx != 0)
13941 && (h == NULL
13942 || (tls_type == (TLS_TLS | TLS_LD)
13943 && !h->elf.def_dynamic)
13944 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13945 || h->elf.root.type != bfd_link_hash_undefweak))
13946 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13947 if (relgot != NULL)
13948 {
13949 outrel.r_offset = (got->output_section->vma
13950 + got->output_offset
13951 + off);
13952 outrel.r_addend = addend;
13953 if (tls_type & (TLS_LD | TLS_GD))
13954 {
13955 outrel.r_addend = 0;
13956 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13957 if (tls_type == (TLS_TLS | TLS_GD))
13958 {
13959 loc = relgot->contents;
13960 loc += (relgot->reloc_count++
13961 * sizeof (Elf64_External_Rela));
13962 bfd_elf64_swap_reloca_out (output_bfd,
13963 &outrel, loc);
13964 outrel.r_offset += 8;
13965 outrel.r_addend = addend;
13966 outrel.r_info
13967 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13968 }
13969 }
13970 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13971 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13972 else if (tls_type == (TLS_TLS | TLS_TPREL))
13973 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13974 else if (indx != 0)
13975 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13976 else
13977 {
13978 if (ifunc)
13979 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13980 else
13981 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13982
13983 /* Write the .got section contents for the sake
13984 of prelink. */
13985 loc = got->contents + off;
13986 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13987 loc);
13988 }
13989
13990 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13991 {
13992 outrel.r_addend += relocation;
13993 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13994 outrel.r_addend -= htab->elf.tls_sec->vma;
13995 }
13996 loc = relgot->contents;
13997 loc += (relgot->reloc_count++
13998 * sizeof (Elf64_External_Rela));
13999 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14000 }
14001
14002 /* Init the .got section contents here if we're not
14003 emitting a reloc. */
14004 else
14005 {
14006 relocation += addend;
14007 if (tls_type == (TLS_TLS | TLS_LD))
14008 relocation = 1;
14009 else if (tls_type != 0)
14010 {
14011 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14012 if (tls_type == (TLS_TLS | TLS_TPREL))
14013 relocation += DTP_OFFSET - TP_OFFSET;
14014
14015 if (tls_type == (TLS_TLS | TLS_GD))
14016 {
14017 bfd_put_64 (output_bfd, relocation,
14018 got->contents + off + 8);
14019 relocation = 1;
14020 }
14021 }
14022
14023 bfd_put_64 (output_bfd, relocation,
14024 got->contents + off);
14025 }
14026 }
14027
14028 if (off >= (bfd_vma) -2)
14029 abort ();
14030
14031 relocation = got->output_section->vma + got->output_offset + off;
14032 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
14033 }
14034 break;
14035
14036 case R_PPC64_PLT16_HA:
14037 case R_PPC64_PLT16_HI:
14038 case R_PPC64_PLT16_LO:
14039 case R_PPC64_PLT32:
14040 case R_PPC64_PLT64:
14041 /* Relocation is to the entry for this symbol in the
14042 procedure linkage table. */
14043
14044 /* Resolve a PLT reloc against a local symbol directly,
14045 without using the procedure linkage table. */
14046 if (h == NULL)
14047 break;
14048
14049 /* It's possible that we didn't make a PLT entry for this
14050 symbol. This happens when statically linking PIC code,
14051 or when using -Bsymbolic. Go find a match if there is a
14052 PLT entry. */
14053 if (htab->elf.splt != NULL)
14054 {
14055 struct plt_entry *ent;
14056 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
14057 if (ent->plt.offset != (bfd_vma) -1
14058 && ent->addend == orig_rel.r_addend)
14059 {
14060 relocation = (htab->elf.splt->output_section->vma
14061 + htab->elf.splt->output_offset
14062 + ent->plt.offset);
14063 unresolved_reloc = FALSE;
14064 break;
14065 }
14066 }
14067 break;
14068
14069 case R_PPC64_TOC:
14070 /* Relocation value is TOC base. */
14071 relocation = TOCstart;
14072 if (r_symndx == STN_UNDEF)
14073 relocation += htab->stub_group[input_section->id].toc_off;
14074 else if (unresolved_reloc)
14075 ;
14076 else if (sec != NULL && sec->id <= htab->top_id)
14077 relocation += htab->stub_group[sec->id].toc_off;
14078 else
14079 unresolved_reloc = TRUE;
14080 goto dodyn;
14081
14082 /* TOC16 relocs. We want the offset relative to the TOC base,
14083 which is the address of the start of the TOC plus 0x8000.
14084 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14085 in this order. */
14086 case R_PPC64_TOC16:
14087 case R_PPC64_TOC16_LO:
14088 case R_PPC64_TOC16_HI:
14089 case R_PPC64_TOC16_DS:
14090 case R_PPC64_TOC16_LO_DS:
14091 case R_PPC64_TOC16_HA:
14092 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
14093 break;
14094
14095 /* Relocate against the beginning of the section. */
14096 case R_PPC64_SECTOFF:
14097 case R_PPC64_SECTOFF_LO:
14098 case R_PPC64_SECTOFF_HI:
14099 case R_PPC64_SECTOFF_DS:
14100 case R_PPC64_SECTOFF_LO_DS:
14101 case R_PPC64_SECTOFF_HA:
14102 if (sec != NULL)
14103 addend -= sec->output_section->vma;
14104 break;
14105
14106 case R_PPC64_REL16:
14107 case R_PPC64_REL16_LO:
14108 case R_PPC64_REL16_HI:
14109 case R_PPC64_REL16_HA:
14110 break;
14111
14112 case R_PPC64_REL14:
14113 case R_PPC64_REL14_BRNTAKEN:
14114 case R_PPC64_REL14_BRTAKEN:
14115 case R_PPC64_REL24:
14116 break;
14117
14118 case R_PPC64_TPREL16:
14119 case R_PPC64_TPREL16_LO:
14120 case R_PPC64_TPREL16_HI:
14121 case R_PPC64_TPREL16_HA:
14122 case R_PPC64_TPREL16_DS:
14123 case R_PPC64_TPREL16_LO_DS:
14124 case R_PPC64_TPREL16_HIGH:
14125 case R_PPC64_TPREL16_HIGHA:
14126 case R_PPC64_TPREL16_HIGHER:
14127 case R_PPC64_TPREL16_HIGHERA:
14128 case R_PPC64_TPREL16_HIGHEST:
14129 case R_PPC64_TPREL16_HIGHESTA:
14130 if (h != NULL
14131 && h->elf.root.type == bfd_link_hash_undefweak
14132 && h->elf.dynindx == -1)
14133 {
14134 /* Make this relocation against an undefined weak symbol
14135 resolve to zero. This is really just a tweak, since
14136 code using weak externs ought to check that they are
14137 defined before using them. */
14138 bfd_byte *p = contents + rel->r_offset - d_offset;
14139
14140 insn = bfd_get_32 (output_bfd, p);
14141 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14142 if (insn != 0)
14143 bfd_put_32 (output_bfd, insn, p);
14144 break;
14145 }
14146 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14147 if (info->shared)
14148 /* The TPREL16 relocs shouldn't really be used in shared
14149 libs as they will result in DT_TEXTREL being set, but
14150 support them anyway. */
14151 goto dodyn;
14152 break;
14153
14154 case R_PPC64_DTPREL16:
14155 case R_PPC64_DTPREL16_LO:
14156 case R_PPC64_DTPREL16_HI:
14157 case R_PPC64_DTPREL16_HA:
14158 case R_PPC64_DTPREL16_DS:
14159 case R_PPC64_DTPREL16_LO_DS:
14160 case R_PPC64_DTPREL16_HIGH:
14161 case R_PPC64_DTPREL16_HIGHA:
14162 case R_PPC64_DTPREL16_HIGHER:
14163 case R_PPC64_DTPREL16_HIGHERA:
14164 case R_PPC64_DTPREL16_HIGHEST:
14165 case R_PPC64_DTPREL16_HIGHESTA:
14166 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14167 break;
14168
14169 case R_PPC64_ADDR64_LOCAL:
14170 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14171 ? h->elf.other
14172 : sym->st_other);
14173 break;
14174
14175 case R_PPC64_DTPMOD64:
14176 relocation = 1;
14177 addend = 0;
14178 goto dodyn;
14179
14180 case R_PPC64_TPREL64:
14181 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14182 goto dodyn;
14183
14184 case R_PPC64_DTPREL64:
14185 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14186 /* Fall thru */
14187
14188 /* Relocations that may need to be propagated if this is a
14189 dynamic object. */
14190 case R_PPC64_REL30:
14191 case R_PPC64_REL32:
14192 case R_PPC64_REL64:
14193 case R_PPC64_ADDR14:
14194 case R_PPC64_ADDR14_BRNTAKEN:
14195 case R_PPC64_ADDR14_BRTAKEN:
14196 case R_PPC64_ADDR16:
14197 case R_PPC64_ADDR16_DS:
14198 case R_PPC64_ADDR16_HA:
14199 case R_PPC64_ADDR16_HI:
14200 case R_PPC64_ADDR16_HIGH:
14201 case R_PPC64_ADDR16_HIGHA:
14202 case R_PPC64_ADDR16_HIGHER:
14203 case R_PPC64_ADDR16_HIGHERA:
14204 case R_PPC64_ADDR16_HIGHEST:
14205 case R_PPC64_ADDR16_HIGHESTA:
14206 case R_PPC64_ADDR16_LO:
14207 case R_PPC64_ADDR16_LO_DS:
14208 case R_PPC64_ADDR24:
14209 case R_PPC64_ADDR32:
14210 case R_PPC64_ADDR64:
14211 case R_PPC64_UADDR16:
14212 case R_PPC64_UADDR32:
14213 case R_PPC64_UADDR64:
14214 dodyn:
14215 if ((input_section->flags & SEC_ALLOC) == 0)
14216 break;
14217
14218 if (NO_OPD_RELOCS && is_opd)
14219 break;
14220
14221 if ((info->shared
14222 && (h == NULL
14223 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14224 || h->elf.root.type != bfd_link_hash_undefweak)
14225 && (must_be_dyn_reloc (info, r_type)
14226 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
14227 || (ELIMINATE_COPY_RELOCS
14228 && !info->shared
14229 && h != NULL
14230 && h->elf.dynindx != -1
14231 && !h->elf.non_got_ref
14232 && !h->elf.def_regular)
14233 || (!info->shared
14234 && (h != NULL
14235 ? h->elf.type == STT_GNU_IFUNC
14236 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
14237 {
14238 bfd_boolean skip, relocate;
14239 asection *sreloc;
14240 bfd_vma out_off;
14241
14242 /* When generating a dynamic object, these relocations
14243 are copied into the output file to be resolved at run
14244 time. */
14245
14246 skip = FALSE;
14247 relocate = FALSE;
14248
14249 out_off = _bfd_elf_section_offset (output_bfd, info,
14250 input_section, rel->r_offset);
14251 if (out_off == (bfd_vma) -1)
14252 skip = TRUE;
14253 else if (out_off == (bfd_vma) -2)
14254 skip = TRUE, relocate = TRUE;
14255 out_off += (input_section->output_section->vma
14256 + input_section->output_offset);
14257 outrel.r_offset = out_off;
14258 outrel.r_addend = rel->r_addend;
14259
14260 /* Optimize unaligned reloc use. */
14261 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14262 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14263 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14264 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14265 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14266 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14267 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14268 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14269 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14270
14271 if (skip)
14272 memset (&outrel, 0, sizeof outrel);
14273 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14274 && !is_opd
14275 && r_type != R_PPC64_TOC)
14276 {
14277 BFD_ASSERT (h->elf.dynindx != -1);
14278 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14279 }
14280 else
14281 {
14282 /* This symbol is local, or marked to become local,
14283 or this is an opd section reloc which must point
14284 at a local function. */
14285 outrel.r_addend += relocation;
14286 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14287 {
14288 if (is_opd && h != NULL)
14289 {
14290 /* Lie about opd entries. This case occurs
14291 when building shared libraries and we
14292 reference a function in another shared
14293 lib. The same thing happens for a weak
14294 definition in an application that's
14295 overridden by a strong definition in a
14296 shared lib. (I believe this is a generic
14297 bug in binutils handling of weak syms.)
14298 In these cases we won't use the opd
14299 entry in this lib. */
14300 unresolved_reloc = FALSE;
14301 }
14302 if (!is_opd
14303 && r_type == R_PPC64_ADDR64
14304 && (h != NULL
14305 ? h->elf.type == STT_GNU_IFUNC
14306 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14307 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14308 else
14309 {
14310 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14311
14312 /* We need to relocate .opd contents for ld.so.
14313 Prelink also wants simple and consistent rules
14314 for relocs. This make all RELATIVE relocs have
14315 *r_offset equal to r_addend. */
14316 relocate = TRUE;
14317 }
14318 }
14319 else
14320 {
14321 long indx = 0;
14322
14323 if (h != NULL
14324 ? h->elf.type == STT_GNU_IFUNC
14325 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14326 {
14327 info->callbacks->einfo
14328 (_("%P: %H: %s for indirect "
14329 "function `%T' unsupported\n"),
14330 input_bfd, input_section, rel->r_offset,
14331 ppc64_elf_howto_table[r_type]->name,
14332 sym_name);
14333 ret = FALSE;
14334 }
14335 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14336 ;
14337 else if (sec == NULL || sec->owner == NULL)
14338 {
14339 bfd_set_error (bfd_error_bad_value);
14340 return FALSE;
14341 }
14342 else
14343 {
14344 asection *osec;
14345
14346 osec = sec->output_section;
14347 indx = elf_section_data (osec)->dynindx;
14348
14349 if (indx == 0)
14350 {
14351 if ((osec->flags & SEC_READONLY) == 0
14352 && htab->elf.data_index_section != NULL)
14353 osec = htab->elf.data_index_section;
14354 else
14355 osec = htab->elf.text_index_section;
14356 indx = elf_section_data (osec)->dynindx;
14357 }
14358 BFD_ASSERT (indx != 0);
14359
14360 /* We are turning this relocation into one
14361 against a section symbol, so subtract out
14362 the output section's address but not the
14363 offset of the input section in the output
14364 section. */
14365 outrel.r_addend -= osec->vma;
14366 }
14367
14368 outrel.r_info = ELF64_R_INFO (indx, r_type);
14369 }
14370 }
14371
14372 sreloc = elf_section_data (input_section)->sreloc;
14373 if (h != NULL
14374 ? h->elf.type == STT_GNU_IFUNC
14375 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14376 sreloc = htab->elf.irelplt;
14377 if (sreloc == NULL)
14378 abort ();
14379
14380 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14381 >= sreloc->size)
14382 abort ();
14383 loc = sreloc->contents;
14384 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14385 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14386
14387 /* If this reloc is against an external symbol, it will
14388 be computed at runtime, so there's no need to do
14389 anything now. However, for the sake of prelink ensure
14390 that the section contents are a known value. */
14391 if (! relocate)
14392 {
14393 unresolved_reloc = FALSE;
14394 /* The value chosen here is quite arbitrary as ld.so
14395 ignores section contents except for the special
14396 case of .opd where the contents might be accessed
14397 before relocation. Choose zero, as that won't
14398 cause reloc overflow. */
14399 relocation = 0;
14400 addend = 0;
14401 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14402 to improve backward compatibility with older
14403 versions of ld. */
14404 if (r_type == R_PPC64_ADDR64)
14405 addend = outrel.r_addend;
14406 /* Adjust pc_relative relocs to have zero in *r_offset. */
14407 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14408 addend = (input_section->output_section->vma
14409 + input_section->output_offset
14410 + rel->r_offset);
14411 }
14412 }
14413 break;
14414
14415 case R_PPC64_COPY:
14416 case R_PPC64_GLOB_DAT:
14417 case R_PPC64_JMP_SLOT:
14418 case R_PPC64_JMP_IREL:
14419 case R_PPC64_RELATIVE:
14420 /* We shouldn't ever see these dynamic relocs in relocatable
14421 files. */
14422 /* Fall through. */
14423
14424 case R_PPC64_PLTGOT16:
14425 case R_PPC64_PLTGOT16_DS:
14426 case R_PPC64_PLTGOT16_HA:
14427 case R_PPC64_PLTGOT16_HI:
14428 case R_PPC64_PLTGOT16_LO:
14429 case R_PPC64_PLTGOT16_LO_DS:
14430 case R_PPC64_PLTREL32:
14431 case R_PPC64_PLTREL64:
14432 /* These ones haven't been implemented yet. */
14433
14434 info->callbacks->einfo
14435 (_("%P: %B: %s is not supported for `%T'\n"),
14436 input_bfd,
14437 ppc64_elf_howto_table[r_type]->name, sym_name);
14438
14439 bfd_set_error (bfd_error_invalid_operation);
14440 ret = FALSE;
14441 continue;
14442 }
14443
14444 /* Multi-instruction sequences that access the TOC can be
14445 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14446 to nop; addi rb,r2,x; */
14447 switch (r_type)
14448 {
14449 default:
14450 break;
14451
14452 case R_PPC64_GOT_TLSLD16_HI:
14453 case R_PPC64_GOT_TLSGD16_HI:
14454 case R_PPC64_GOT_TPREL16_HI:
14455 case R_PPC64_GOT_DTPREL16_HI:
14456 case R_PPC64_GOT16_HI:
14457 case R_PPC64_TOC16_HI:
14458 /* These relocs would only be useful if building up an
14459 offset to later add to r2, perhaps in an indexed
14460 addressing mode instruction. Don't try to optimize.
14461 Unfortunately, the possibility of someone building up an
14462 offset like this or even with the HA relocs, means that
14463 we need to check the high insn when optimizing the low
14464 insn. */
14465 break;
14466
14467 case R_PPC64_GOT_TLSLD16_HA:
14468 case R_PPC64_GOT_TLSGD16_HA:
14469 case R_PPC64_GOT_TPREL16_HA:
14470 case R_PPC64_GOT_DTPREL16_HA:
14471 case R_PPC64_GOT16_HA:
14472 case R_PPC64_TOC16_HA:
14473 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14474 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14475 {
14476 bfd_byte *p = contents + (rel->r_offset & ~3);
14477 bfd_put_32 (input_bfd, NOP, p);
14478 }
14479 break;
14480
14481 case R_PPC64_GOT_TLSLD16_LO:
14482 case R_PPC64_GOT_TLSGD16_LO:
14483 case R_PPC64_GOT_TPREL16_LO_DS:
14484 case R_PPC64_GOT_DTPREL16_LO_DS:
14485 case R_PPC64_GOT16_LO:
14486 case R_PPC64_GOT16_LO_DS:
14487 case R_PPC64_TOC16_LO:
14488 case R_PPC64_TOC16_LO_DS:
14489 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14490 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14491 {
14492 bfd_byte *p = contents + (rel->r_offset & ~3);
14493 insn = bfd_get_32 (input_bfd, p);
14494 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14495 {
14496 /* Transform addic to addi when we change reg. */
14497 insn &= ~((0x3f << 26) | (0x1f << 16));
14498 insn |= (14u << 26) | (2 << 16);
14499 }
14500 else
14501 {
14502 insn &= ~(0x1f << 16);
14503 insn |= 2 << 16;
14504 }
14505 bfd_put_32 (input_bfd, insn, p);
14506 }
14507 break;
14508 }
14509
14510 /* Do any further special processing. */
14511 switch (r_type)
14512 {
14513 default:
14514 break;
14515
14516 case R_PPC64_REL16_HA:
14517 case R_PPC64_ADDR16_HA:
14518 case R_PPC64_ADDR16_HIGHA:
14519 case R_PPC64_ADDR16_HIGHERA:
14520 case R_PPC64_ADDR16_HIGHESTA:
14521 case R_PPC64_TOC16_HA:
14522 case R_PPC64_SECTOFF_HA:
14523 case R_PPC64_TPREL16_HA:
14524 case R_PPC64_TPREL16_HIGHA:
14525 case R_PPC64_TPREL16_HIGHERA:
14526 case R_PPC64_TPREL16_HIGHESTA:
14527 case R_PPC64_DTPREL16_HA:
14528 case R_PPC64_DTPREL16_HIGHA:
14529 case R_PPC64_DTPREL16_HIGHERA:
14530 case R_PPC64_DTPREL16_HIGHESTA:
14531 /* It's just possible that this symbol is a weak symbol
14532 that's not actually defined anywhere. In that case,
14533 'sec' would be NULL, and we should leave the symbol
14534 alone (it will be set to zero elsewhere in the link). */
14535 if (sec == NULL)
14536 break;
14537 /* Fall thru */
14538
14539 case R_PPC64_GOT16_HA:
14540 case R_PPC64_PLTGOT16_HA:
14541 case R_PPC64_PLT16_HA:
14542 case R_PPC64_GOT_TLSGD16_HA:
14543 case R_PPC64_GOT_TLSLD16_HA:
14544 case R_PPC64_GOT_TPREL16_HA:
14545 case R_PPC64_GOT_DTPREL16_HA:
14546 /* Add 0x10000 if sign bit in 0:15 is set.
14547 Bits 0:15 are not used. */
14548 addend += 0x8000;
14549 break;
14550
14551 case R_PPC64_ADDR16_DS:
14552 case R_PPC64_ADDR16_LO_DS:
14553 case R_PPC64_GOT16_DS:
14554 case R_PPC64_GOT16_LO_DS:
14555 case R_PPC64_PLT16_LO_DS:
14556 case R_PPC64_SECTOFF_DS:
14557 case R_PPC64_SECTOFF_LO_DS:
14558 case R_PPC64_TOC16_DS:
14559 case R_PPC64_TOC16_LO_DS:
14560 case R_PPC64_PLTGOT16_DS:
14561 case R_PPC64_PLTGOT16_LO_DS:
14562 case R_PPC64_GOT_TPREL16_DS:
14563 case R_PPC64_GOT_TPREL16_LO_DS:
14564 case R_PPC64_GOT_DTPREL16_DS:
14565 case R_PPC64_GOT_DTPREL16_LO_DS:
14566 case R_PPC64_TPREL16_DS:
14567 case R_PPC64_TPREL16_LO_DS:
14568 case R_PPC64_DTPREL16_DS:
14569 case R_PPC64_DTPREL16_LO_DS:
14570 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14571 mask = 3;
14572 /* If this reloc is against an lq insn, then the value must be
14573 a multiple of 16. This is somewhat of a hack, but the
14574 "correct" way to do this by defining _DQ forms of all the
14575 _DS relocs bloats all reloc switches in this file. It
14576 doesn't seem to make much sense to use any of these relocs
14577 in data, so testing the insn should be safe. */
14578 if ((insn & (0x3f << 26)) == (56u << 26))
14579 mask = 15;
14580 if (((relocation + addend) & mask) != 0)
14581 {
14582 info->callbacks->einfo
14583 (_("%P: %H: error: %s not a multiple of %u\n"),
14584 input_bfd, input_section, rel->r_offset,
14585 ppc64_elf_howto_table[r_type]->name,
14586 mask + 1);
14587 bfd_set_error (bfd_error_bad_value);
14588 ret = FALSE;
14589 continue;
14590 }
14591 break;
14592 }
14593
14594 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
14595 because such sections are not SEC_ALLOC and thus ld.so will
14596 not process them. */
14597 if (unresolved_reloc
14598 && !((input_section->flags & SEC_DEBUGGING) != 0
14599 && h->elf.def_dynamic)
14600 && _bfd_elf_section_offset (output_bfd, info, input_section,
14601 rel->r_offset) != (bfd_vma) -1)
14602 {
14603 info->callbacks->einfo
14604 (_("%P: %H: unresolvable %s against `%T'\n"),
14605 input_bfd, input_section, rel->r_offset,
14606 ppc64_elf_howto_table[(int) r_type]->name,
14607 h->elf.root.root.string);
14608 ret = FALSE;
14609 }
14610
14611 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
14612 input_bfd,
14613 input_section,
14614 contents,
14615 rel->r_offset,
14616 relocation,
14617 addend);
14618
14619 if (r != bfd_reloc_ok)
14620 {
14621 char *more_info = NULL;
14622 const char *reloc_name = ppc64_elf_howto_table[r_type]->name;
14623
14624 if (reloc_dest != DEST_NORMAL)
14625 {
14626 more_info = bfd_malloc (strlen (reloc_name) + 8);
14627 if (more_info != NULL)
14628 {
14629 strcpy (more_info, reloc_name);
14630 strcat (more_info, (reloc_dest == DEST_OPD
14631 ? " (OPD)" : " (stub)"));
14632 reloc_name = more_info;
14633 }
14634 }
14635
14636 if (r == bfd_reloc_overflow)
14637 {
14638 if (warned)
14639 continue;
14640 if (h != NULL
14641 && h->elf.root.type == bfd_link_hash_undefweak
14642 && ppc64_elf_howto_table[r_type]->pc_relative)
14643 {
14644 /* Assume this is a call protected by other code that
14645 detects the symbol is undefined. If this is the case,
14646 we can safely ignore the overflow. If not, the
14647 program is hosed anyway, and a little warning isn't
14648 going to help. */
14649
14650 continue;
14651 }
14652
14653 if (!((*info->callbacks->reloc_overflow)
14654 (info, &h->elf.root, sym_name,
14655 reloc_name, orig_rel.r_addend,
14656 input_bfd, input_section, rel->r_offset)))
14657 return FALSE;
14658 }
14659 else
14660 {
14661 info->callbacks->einfo
14662 (_("%P: %H: %s against `%T': error %d\n"),
14663 input_bfd, input_section, rel->r_offset,
14664 reloc_name, sym_name, (int) r);
14665 ret = FALSE;
14666 }
14667 if (more_info != NULL)
14668 free (more_info);
14669 }
14670 }
14671
14672 /* If we're emitting relocations, then shortly after this function
14673 returns, reloc offsets and addends for this section will be
14674 adjusted. Worse, reloc symbol indices will be for the output
14675 file rather than the input. Save a copy of the relocs for
14676 opd_entry_value. */
14677 if (is_opd && (info->emitrelocations || info->relocatable))
14678 {
14679 bfd_size_type amt;
14680 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14681 rel = bfd_alloc (input_bfd, amt);
14682 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
14683 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
14684 if (rel == NULL)
14685 return FALSE;
14686 memcpy (rel, relocs, amt);
14687 }
14688 return ret;
14689 }
14690
14691 /* Adjust the value of any local symbols in opd sections. */
14692
14693 static int
14694 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14695 const char *name ATTRIBUTE_UNUSED,
14696 Elf_Internal_Sym *elfsym,
14697 asection *input_sec,
14698 struct elf_link_hash_entry *h)
14699 {
14700 struct _opd_sec_data *opd;
14701 long adjust;
14702 bfd_vma value;
14703
14704 if (h != NULL)
14705 return 1;
14706
14707 opd = get_opd_info (input_sec);
14708 if (opd == NULL || opd->adjust == NULL)
14709 return 1;
14710
14711 value = elfsym->st_value - input_sec->output_offset;
14712 if (!info->relocatable)
14713 value -= input_sec->output_section->vma;
14714
14715 adjust = opd->adjust[value / 8];
14716 if (adjust == -1)
14717 return 2;
14718
14719 elfsym->st_value += adjust;
14720 return 1;
14721 }
14722
14723 /* Finish up dynamic symbol handling. We set the contents of various
14724 dynamic sections here. */
14725
14726 static bfd_boolean
14727 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14728 struct bfd_link_info *info,
14729 struct elf_link_hash_entry *h,
14730 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14731 {
14732 struct ppc_link_hash_table *htab;
14733 struct plt_entry *ent;
14734 Elf_Internal_Rela rela;
14735 bfd_byte *loc;
14736
14737 htab = ppc_hash_table (info);
14738 if (htab == NULL)
14739 return FALSE;
14740
14741 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14742 if (ent->plt.offset != (bfd_vma) -1)
14743 {
14744 /* This symbol has an entry in the procedure linkage
14745 table. Set it up. */
14746 if (!htab->elf.dynamic_sections_created
14747 || h->dynindx == -1)
14748 {
14749 BFD_ASSERT (h->type == STT_GNU_IFUNC
14750 && h->def_regular
14751 && (h->root.type == bfd_link_hash_defined
14752 || h->root.type == bfd_link_hash_defweak));
14753 rela.r_offset = (htab->elf.iplt->output_section->vma
14754 + htab->elf.iplt->output_offset
14755 + ent->plt.offset);
14756 if (htab->opd_abi)
14757 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14758 else
14759 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14760 rela.r_addend = (h->root.u.def.value
14761 + h->root.u.def.section->output_offset
14762 + h->root.u.def.section->output_section->vma
14763 + ent->addend);
14764 loc = (htab->elf.irelplt->contents
14765 + (htab->elf.irelplt->reloc_count++
14766 * sizeof (Elf64_External_Rela)));
14767 }
14768 else
14769 {
14770 rela.r_offset = (htab->elf.splt->output_section->vma
14771 + htab->elf.splt->output_offset
14772 + ent->plt.offset);
14773 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14774 rela.r_addend = ent->addend;
14775 loc = (htab->elf.srelplt->contents
14776 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
14777 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
14778 }
14779 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14780
14781 if (!htab->opd_abi)
14782 {
14783 if (!h->def_regular)
14784 {
14785 /* Mark the symbol as undefined, rather than as
14786 defined in glink. Leave the value if there were
14787 any relocations where pointer equality matters
14788 (this is a clue for the dynamic linker, to make
14789 function pointer comparisons work between an
14790 application and shared library), otherwise set it
14791 to zero. */
14792 sym->st_shndx = SHN_UNDEF;
14793 if (!h->pointer_equality_needed)
14794 sym->st_value = 0;
14795 else if (!h->ref_regular_nonweak)
14796 {
14797 /* This breaks function pointer comparisons, but
14798 that is better than breaking tests for a NULL
14799 function pointer. */
14800 sym->st_value = 0;
14801 }
14802 }
14803 }
14804 }
14805
14806 if (h->needs_copy)
14807 {
14808 /* This symbol needs a copy reloc. Set it up. */
14809
14810 if (h->dynindx == -1
14811 || (h->root.type != bfd_link_hash_defined
14812 && h->root.type != bfd_link_hash_defweak)
14813 || htab->relbss == NULL)
14814 abort ();
14815
14816 rela.r_offset = (h->root.u.def.value
14817 + h->root.u.def.section->output_section->vma
14818 + h->root.u.def.section->output_offset);
14819 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14820 rela.r_addend = 0;
14821 loc = htab->relbss->contents;
14822 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14823 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14824 }
14825
14826 return TRUE;
14827 }
14828
14829 /* Used to decide how to sort relocs in an optimal manner for the
14830 dynamic linker, before writing them out. */
14831
14832 static enum elf_reloc_type_class
14833 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14834 const asection *rel_sec,
14835 const Elf_Internal_Rela *rela)
14836 {
14837 enum elf_ppc64_reloc_type r_type;
14838 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14839
14840 if (rel_sec == htab->elf.irelplt)
14841 return reloc_class_ifunc;
14842
14843 r_type = ELF64_R_TYPE (rela->r_info);
14844 switch (r_type)
14845 {
14846 case R_PPC64_RELATIVE:
14847 return reloc_class_relative;
14848 case R_PPC64_JMP_SLOT:
14849 return reloc_class_plt;
14850 case R_PPC64_COPY:
14851 return reloc_class_copy;
14852 default:
14853 return reloc_class_normal;
14854 }
14855 }
14856
14857 /* Finish up the dynamic sections. */
14858
14859 static bfd_boolean
14860 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14861 struct bfd_link_info *info)
14862 {
14863 struct ppc_link_hash_table *htab;
14864 bfd *dynobj;
14865 asection *sdyn;
14866
14867 htab = ppc_hash_table (info);
14868 if (htab == NULL)
14869 return FALSE;
14870
14871 dynobj = htab->elf.dynobj;
14872 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14873
14874 if (htab->elf.dynamic_sections_created)
14875 {
14876 Elf64_External_Dyn *dyncon, *dynconend;
14877
14878 if (sdyn == NULL || htab->elf.sgot == NULL)
14879 abort ();
14880
14881 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14882 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14883 for (; dyncon < dynconend; dyncon++)
14884 {
14885 Elf_Internal_Dyn dyn;
14886 asection *s;
14887
14888 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14889
14890 switch (dyn.d_tag)
14891 {
14892 default:
14893 continue;
14894
14895 case DT_PPC64_GLINK:
14896 s = htab->glink;
14897 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14898 /* We stupidly defined DT_PPC64_GLINK to be the start
14899 of glink rather than the first entry point, which is
14900 what ld.so needs, and now have a bigger stub to
14901 support automatic multiple TOCs. */
14902 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
14903 break;
14904
14905 case DT_PPC64_OPD:
14906 s = bfd_get_section_by_name (output_bfd, ".opd");
14907 if (s == NULL)
14908 continue;
14909 dyn.d_un.d_ptr = s->vma;
14910 break;
14911
14912 case DT_PPC64_OPT:
14913 if (htab->do_multi_toc && htab->multi_toc_needed)
14914 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
14915 break;
14916
14917 case DT_PPC64_OPDSZ:
14918 s = bfd_get_section_by_name (output_bfd, ".opd");
14919 if (s == NULL)
14920 continue;
14921 dyn.d_un.d_val = s->size;
14922 break;
14923
14924 case DT_PLTGOT:
14925 s = htab->elf.splt;
14926 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14927 break;
14928
14929 case DT_JMPREL:
14930 s = htab->elf.srelplt;
14931 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14932 break;
14933
14934 case DT_PLTRELSZ:
14935 dyn.d_un.d_val = htab->elf.srelplt->size;
14936 break;
14937
14938 case DT_RELASZ:
14939 /* Don't count procedure linkage table relocs in the
14940 overall reloc count. */
14941 s = htab->elf.srelplt;
14942 if (s == NULL)
14943 continue;
14944 dyn.d_un.d_val -= s->size;
14945 break;
14946
14947 case DT_RELA:
14948 /* We may not be using the standard ELF linker script.
14949 If .rela.plt is the first .rela section, we adjust
14950 DT_RELA to not include it. */
14951 s = htab->elf.srelplt;
14952 if (s == NULL)
14953 continue;
14954 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14955 continue;
14956 dyn.d_un.d_ptr += s->size;
14957 break;
14958 }
14959
14960 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14961 }
14962 }
14963
14964 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
14965 {
14966 /* Fill in the first entry in the global offset table.
14967 We use it to hold the link-time TOCbase. */
14968 bfd_put_64 (output_bfd,
14969 elf_gp (output_bfd) + TOC_BASE_OFF,
14970 htab->elf.sgot->contents);
14971
14972 /* Set .got entry size. */
14973 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
14974 }
14975
14976 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
14977 {
14978 /* Set .plt entry size. */
14979 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
14980 = PLT_ENTRY_SIZE (htab);
14981 }
14982
14983 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14984 brlt ourselves if emitrelocations. */
14985 if (htab->brlt != NULL
14986 && htab->brlt->reloc_count != 0
14987 && !_bfd_elf_link_output_relocs (output_bfd,
14988 htab->brlt,
14989 elf_section_data (htab->brlt)->rela.hdr,
14990 elf_section_data (htab->brlt)->relocs,
14991 NULL))
14992 return FALSE;
14993
14994 if (htab->glink != NULL
14995 && htab->glink->reloc_count != 0
14996 && !_bfd_elf_link_output_relocs (output_bfd,
14997 htab->glink,
14998 elf_section_data (htab->glink)->rela.hdr,
14999 elf_section_data (htab->glink)->relocs,
15000 NULL))
15001 return FALSE;
15002
15003
15004 if (htab->glink_eh_frame != NULL
15005 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15006 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15007 htab->glink_eh_frame,
15008 htab->glink_eh_frame->contents))
15009 return FALSE;
15010
15011 /* We need to handle writing out multiple GOT sections ourselves,
15012 since we didn't add them to DYNOBJ. We know dynobj is the first
15013 bfd. */
15014 while ((dynobj = dynobj->link_next) != NULL)
15015 {
15016 asection *s;
15017
15018 if (!is_ppc64_elf (dynobj))
15019 continue;
15020
15021 s = ppc64_elf_tdata (dynobj)->got;
15022 if (s != NULL
15023 && s->size != 0
15024 && s->output_section != bfd_abs_section_ptr
15025 && !bfd_set_section_contents (output_bfd, s->output_section,
15026 s->contents, s->output_offset,
15027 s->size))
15028 return FALSE;
15029 s = ppc64_elf_tdata (dynobj)->relgot;
15030 if (s != NULL
15031 && s->size != 0
15032 && s->output_section != bfd_abs_section_ptr
15033 && !bfd_set_section_contents (output_bfd, s->output_section,
15034 s->contents, s->output_offset,
15035 s->size))
15036 return FALSE;
15037 }
15038
15039 return TRUE;
15040 }
15041
15042 #include "elf64-target.h"
15043
15044 /* FreeBSD support */
15045
15046 #undef TARGET_LITTLE_SYM
15047 #undef TARGET_LITTLE_NAME
15048
15049 #undef TARGET_BIG_SYM
15050 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
15051 #undef TARGET_BIG_NAME
15052 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15053
15054 #undef ELF_OSABI
15055 #define ELF_OSABI ELFOSABI_FREEBSD
15056
15057 #undef elf64_bed
15058 #define elf64_bed elf64_powerpc_fbsd_bed
15059
15060 #include "elf64-target.h"
15061