projects / binutils-gdb.git / blob
? search:


fa6b095a1f912a4e27d044801179daef19ebebb2
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 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 <amodra@bigpond.net.au>
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 2 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 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define elf_info_to_howto ppc64_elf_info_to_howto
65
66 #define elf_backend_want_got_sym 0
67 #define elf_backend_want_plt_sym 0
68 #define elf_backend_plt_alignment 3
69 #define elf_backend_plt_not_loaded 1
70 #define elf_backend_got_header_size 8
71 #define elf_backend_can_gc_sections 1
72 #define elf_backend_can_refcount 1
73 #define elf_backend_rela_normal 1
74
75 #define bfd_elf64_mkobject ppc64_elf_mkobject
76 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
77 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
78 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
79 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
80 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
81 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
82
83 #define elf_backend_object_p ppc64_elf_object_p
84 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
85 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
86 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
87 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
88 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
89 #define elf_backend_check_directives ppc64_elf_check_directives
90 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
91 #define elf_backend_check_relocs ppc64_elf_check_relocs
92 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
93 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
94 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
95 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
96 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
97 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
98 #define elf_backend_relocate_section ppc64_elf_relocate_section
99 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
100 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
101 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
102 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
103 #define elf_backend_special_sections ppc64_elf_special_sections
104
105 /* The name of the dynamic interpreter. This is put in the .interp
106 section. */
107 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
108
109 /* The size in bytes of an entry in the procedure linkage table. */
110 #define PLT_ENTRY_SIZE 24
111
112 /* The initial size of the plt reserved for the dynamic linker. */
113 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
114
115 /* TOC base pointers offset from start of TOC. */
116 #define TOC_BASE_OFF 0x8000
117
118 /* Offset of tp and dtp pointers from start of TLS block. */
119 #define TP_OFFSET 0x7000
120 #define DTP_OFFSET 0x8000
121
122 /* .plt call stub instructions. The normal stub is like this, but
123 sometimes the .plt entry crosses a 64k boundary and we need to
124 insert an addis to adjust r12. */
125 #define PLT_CALL_STUB_SIZE (7*4)
126 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
127 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
128 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
129 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
130 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
131 /* ld %r11,xxx+16@l(%r12) */
132 #define BCTR 0x4e800420 /* bctr */
133
134
135 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
136 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
137
138 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
139
140 /* glink call stub instructions. We enter with the index in R0, and the
141 address of glink entry in CTR. From that, we can calculate PLT0. */
142 #define GLINK_CALL_STUB_SIZE (16*4)
143 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
144 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
145 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
146 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
147 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
148 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
149 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
150 /* sub %r12,%r12,%r11 */
151 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
152 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
153 /* ld %r11,xxx@l(%r12) */
154 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
155 /* ld %r2,8(%r12) */
156 /* mtctr %r11 */
157 /* ld %r11,16(%r12) */
158 /* bctr */
159
160 /* Pad with this. */
161 #define NOP 0x60000000
162
163 /* Some other nops. */
164 #define CROR_151515 0x4def7b82
165 #define CROR_313131 0x4ffffb82
166
167 /* .glink entries for the first 32k functions are two instructions. */
168 #define LI_R0_0 0x38000000 /* li %r0,0 */
169 #define B_DOT 0x48000000 /* b . */
170
171 /* After that, we need two instructions to load the index, followed by
172 a branch. */
173 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
174 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
175
176 /* Instructions used by the save and restore reg functions. */
177 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
178 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
179 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
180 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
181 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
182 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
183 #define LI_R12_0 0x39800000 /* li %r12,0 */
184 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
185 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
186 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
187 #define BLR 0x4e800020 /* blr */
188
189 /* Since .opd is an array of descriptors and each entry will end up
190 with identical R_PPC64_RELATIVE relocs, there is really no need to
191 propagate .opd relocs; The dynamic linker should be taught to
192 relocate .opd without reloc entries. */
193 #ifndef NO_OPD_RELOCS
194 #define NO_OPD_RELOCS 0
195 #endif
196 \f
197 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
198
199 /* Relocation HOWTO's. */
200 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
201
202 static reloc_howto_type ppc64_elf_howto_raw[] = {
203 /* This reloc does nothing. */
204 HOWTO (R_PPC64_NONE, /* type */
205 0, /* rightshift */
206 2, /* size (0 = byte, 1 = short, 2 = long) */
207 32, /* bitsize */
208 FALSE, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_dont, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_PPC64_NONE", /* name */
213 FALSE, /* partial_inplace */
214 0, /* src_mask */
215 0, /* dst_mask */
216 FALSE), /* pcrel_offset */
217
218 /* A standard 32 bit relocation. */
219 HOWTO (R_PPC64_ADDR32, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_bitfield, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_ADDR32", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0xffffffff, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* An absolute 26 bit branch; the lower two bits must be zero.
234 FIXME: we don't check that, we just clear them. */
235 HOWTO (R_PPC64_ADDR24, /* type */
236 0, /* rightshift */
237 2, /* size (0 = byte, 1 = short, 2 = long) */
238 26, /* bitsize */
239 FALSE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_bitfield, /* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_PPC64_ADDR24", /* name */
244 FALSE, /* partial_inplace */
245 0, /* src_mask */
246 0x03fffffc, /* dst_mask */
247 FALSE), /* pcrel_offset */
248
249 /* A standard 16 bit relocation. */
250 HOWTO (R_PPC64_ADDR16, /* type */
251 0, /* rightshift */
252 1, /* size (0 = byte, 1 = short, 2 = long) */
253 16, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR16", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0xffff, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A 16 bit relocation without overflow. */
265 HOWTO (R_PPC64_ADDR16_LO, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_dont,/* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16_LO", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* Bits 16-31 of an address. */
280 HOWTO (R_PPC64_ADDR16_HI, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_HI", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
295 bits, treated as a signed number, is negative. */
296 HOWTO (R_PPC64_ADDR16_HA, /* type */
297 16, /* rightshift */
298 1, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_dont, /* complain_on_overflow */
303 ppc64_elf_ha_reloc, /* special_function */
304 "R_PPC64_ADDR16_HA", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xffff, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch; the lower two bits must be zero.
311 FIXME: we don't check that, we just clear them. */
312 HOWTO (R_PPC64_ADDR14, /* type */
313 0, /* rightshift */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_bitfield, /* complain_on_overflow */
319 ppc64_elf_branch_reloc, /* special_function */
320 "R_PPC64_ADDR14", /* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0x0000fffc, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch, for which bit 10 should be set to
327 indicate that the branch is expected to be taken. The lower two
328 bits must be zero. */
329 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_bitfield, /* complain_on_overflow */
336 ppc64_elf_brtaken_reloc, /* special_function */
337 "R_PPC64_ADDR14_BRTAKEN",/* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0x0000fffc, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* An absolute 16 bit branch, for which bit 10 should be set to
344 indicate that the branch is not expected to be taken. The lower
345 two bits must be zero. */
346 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 0, /* bitpos */
352 complain_overflow_bitfield, /* complain_on_overflow */
353 ppc64_elf_brtaken_reloc, /* special_function */
354 "R_PPC64_ADDR14_BRNTAKEN",/* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0x0000fffc, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 /* A relative 26 bit branch; the lower two bits must be zero. */
361 HOWTO (R_PPC64_REL24, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 26, /* bitsize */
365 TRUE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 ppc64_elf_branch_reloc, /* special_function */
369 "R_PPC64_REL24", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x03fffffc, /* dst_mask */
373 TRUE), /* pcrel_offset */
374
375 /* A relative 16 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL14, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 16, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL14", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x0000fffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch. Bit 10 should be set to indicate that
391 the branch is expected to be taken. The lower two bits must be
392 zero. */
393 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 TRUE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 ppc64_elf_brtaken_reloc, /* special_function */
401 "R_PPC64_REL14_BRTAKEN", /* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0x0000fffc, /* dst_mask */
405 TRUE), /* pcrel_offset */
406
407 /* A relative 16 bit branch. Bit 10 should be set to indicate that
408 the branch is not expected to be taken. The lower two bits must
409 be zero. */
410 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
411 0, /* rightshift */
412 2, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 TRUE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc64_elf_brtaken_reloc, /* special_function */
418 "R_PPC64_REL14_BRNTAKEN",/* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0x0000fffc, /* dst_mask */
422 TRUE), /* pcrel_offset */
423
424 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
425 symbol. */
426 HOWTO (R_PPC64_GOT16, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_unhandled_reloc, /* special_function */
434 "R_PPC64_GOT16", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC64_GOT16_LO, /* type */
443 0, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc64_elf_unhandled_reloc, /* special_function */
450 "R_PPC64_GOT16_LO", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC64_GOT16_HI, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont,/* complain_on_overflow */
465 ppc64_elf_unhandled_reloc, /* special_function */
466 "R_PPC64_GOT16_HI", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
473 the symbol. */
474 HOWTO (R_PPC64_GOT16_HA, /* type */
475 16, /* rightshift */
476 1, /* size (0 = byte, 1 = short, 2 = long) */
477 16, /* bitsize */
478 FALSE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_dont,/* complain_on_overflow */
481 ppc64_elf_unhandled_reloc, /* special_function */
482 "R_PPC64_GOT16_HA", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0xffff, /* dst_mask */
486 FALSE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC64_COPY, /* type */
494 0, /* rightshift */
495 0, /* this one is variable size */
496 0, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc64_elf_unhandled_reloc, /* special_function */
501 "R_PPC64_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC64_ADDR64, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC64_GLOB_DAT, /* type */
510 0, /* rightshift */
511 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
512 64, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc64_elf_unhandled_reloc, /* special_function */
517 "R_PPC64_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 ONES (64), /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Created by the link editor. Marks a procedure linkage table
524 entry for a symbol. */
525 HOWTO (R_PPC64_JMP_SLOT, /* type */
526 0, /* rightshift */
527 0, /* size (0 = byte, 1 = short, 2 = long) */
528 0, /* bitsize */
529 FALSE, /* pc_relative */
530 0, /* bitpos */
531 complain_overflow_dont, /* complain_on_overflow */
532 ppc64_elf_unhandled_reloc, /* special_function */
533 "R_PPC64_JMP_SLOT", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 0, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 /* Used only by the dynamic linker. When the object is run, this
540 doubleword64 is set to the load address of the object, plus the
541 addend. */
542 HOWTO (R_PPC64_RELATIVE, /* type */
543 0, /* rightshift */
544 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
545 64, /* bitsize */
546 FALSE, /* pc_relative */
547 0, /* bitpos */
548 complain_overflow_dont, /* complain_on_overflow */
549 bfd_elf_generic_reloc, /* special_function */
550 "R_PPC64_RELATIVE", /* name */
551 FALSE, /* partial_inplace */
552 0, /* src_mask */
553 ONES (64), /* dst_mask */
554 FALSE), /* pcrel_offset */
555
556 /* Like R_PPC64_ADDR32, but may be unaligned. */
557 HOWTO (R_PPC64_UADDR32, /* type */
558 0, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 32, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_bitfield, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_UADDR32", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0xffffffff, /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR16, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR16, /* type */
573 0, /* rightshift */
574 1, /* size (0 = byte, 1 = short, 2 = long) */
575 16, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR16", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* 32-bit PC relative. */
587 HOWTO (R_PPC64_REL32, /* type */
588 0, /* rightshift */
589 2, /* size (0 = byte, 1 = short, 2 = long) */
590 32, /* bitsize */
591 TRUE, /* pc_relative */
592 0, /* bitpos */
593 /* FIXME: Verify. Was complain_overflow_bitfield. */
594 complain_overflow_signed, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC64_REL32", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffffffff, /* dst_mask */
600 TRUE), /* pcrel_offset */
601
602 /* 32-bit relocation to the symbol's procedure linkage table. */
603 HOWTO (R_PPC64_PLT32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 FALSE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_bitfield, /* complain_on_overflow */
610 ppc64_elf_unhandled_reloc, /* special_function */
611 "R_PPC64_PLT32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 FALSE), /* pcrel_offset */
616
617 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
618 FIXME: R_PPC64_PLTREL32 not supported. */
619 HOWTO (R_PPC64_PLTREL32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 TRUE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_signed, /* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_PPC64_PLTREL32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0xffffffff, /* dst_mask */
631 TRUE), /* pcrel_offset */
632
633 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
634 the symbol. */
635 HOWTO (R_PPC64_PLT16_LO, /* type */
636 0, /* rightshift */
637 1, /* size (0 = byte, 1 = short, 2 = long) */
638 16, /* bitsize */
639 FALSE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc64_elf_unhandled_reloc, /* special_function */
643 "R_PPC64_PLT16_LO", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0xffff, /* dst_mask */
647 FALSE), /* pcrel_offset */
648
649 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC64_PLT16_HI, /* type */
652 16, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc64_elf_unhandled_reloc, /* special_function */
659 "R_PPC64_PLT16_HI", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC64_PLT16_HA, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT16_HA", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* 16-bit section relative relocation. */
682 HOWTO (R_PPC64_SECTOFF, /* type */
683 0, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_bitfield, /* complain_on_overflow */
689 ppc64_elf_sectoff_reloc, /* special_function */
690 "R_PPC64_SECTOFF", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* Like R_PPC64_SECTOFF, but no overflow warning. */
697 HOWTO (R_PPC64_SECTOFF_LO, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_dont, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF_LO", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* 16-bit upper half section relative relocation. */
712 HOWTO (R_PPC64_SECTOFF_HI, /* type */
713 16, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_HI", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half adjusted section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HA, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_ha_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HA", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* Like R_PPC64_REL24 without touching the two least significant bits. */
742 HOWTO (R_PPC64_REL30, /* type */
743 2, /* rightshift */
744 2, /* size (0 = byte, 1 = short, 2 = long) */
745 30, /* bitsize */
746 TRUE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 bfd_elf_generic_reloc, /* special_function */
750 "R_PPC64_REL30", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xfffffffc, /* dst_mask */
754 TRUE), /* pcrel_offset */
755
756 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
757
758 /* A standard 64-bit relocation. */
759 HOWTO (R_PPC64_ADDR64, /* type */
760 0, /* rightshift */
761 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
762 64, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_PPC64_ADDR64", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 ONES (64), /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* The bits 32-47 of an address. */
774 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
775 32, /* rightshift */
776 1, /* size (0 = byte, 1 = short, 2 = long) */
777 16, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR16_HIGHER", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0xffff, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address, plus 1 if the contents of the low
789 16 bits, treated as a signed number, is negative. */
790 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
791 32, /* rightshift */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
793 16, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 ppc64_elf_ha_reloc, /* special_function */
798 "R_PPC64_ADDR16_HIGHERA", /* name */
799 FALSE, /* partial_inplace */
800 0, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* The bits 48-63 of an address. */
805 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
806 48, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 bfd_elf_generic_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHEST", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address, plus 1 if the contents of the low
820 16 bits, treated as a signed number, is negative. */
821 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
822 48, /* rightshift */
823 1, /* size (0 = byte, 1 = short, 2 = long) */
824 16, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 ppc64_elf_ha_reloc, /* special_function */
829 "R_PPC64_ADDR16_HIGHESTA", /* name */
830 FALSE, /* partial_inplace */
831 0, /* src_mask */
832 0xffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* Like ADDR64, but may be unaligned. */
836 HOWTO (R_PPC64_UADDR64, /* type */
837 0, /* rightshift */
838 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
839 64, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 "R_PPC64_UADDR64", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 ONES (64), /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* 64-bit relative relocation. */
851 HOWTO (R_PPC64_REL64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 TRUE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_REL64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 TRUE), /* pcrel_offset */
864
865 /* 64-bit relocation to the symbol's procedure linkage table. */
866 HOWTO (R_PPC64_PLT64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 FALSE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 ppc64_elf_unhandled_reloc, /* special_function */
874 "R_PPC64_PLT64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 FALSE), /* pcrel_offset */
879
880 /* 64-bit PC relative relocation to the symbol's procedure linkage
881 table. */
882 /* FIXME: R_PPC64_PLTREL64 not supported. */
883 HOWTO (R_PPC64_PLTREL64, /* type */
884 0, /* rightshift */
885 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
886 64, /* bitsize */
887 TRUE, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_dont, /* complain_on_overflow */
890 ppc64_elf_unhandled_reloc, /* special_function */
891 "R_PPC64_PLTREL64", /* name */
892 FALSE, /* partial_inplace */
893 0, /* src_mask */
894 ONES (64), /* dst_mask */
895 TRUE), /* pcrel_offset */
896
897 /* 16 bit TOC-relative relocation. */
898
899 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
900 HOWTO (R_PPC64_TOC16, /* type */
901 0, /* rightshift */
902 1, /* size (0 = byte, 1 = short, 2 = long) */
903 16, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_signed, /* complain_on_overflow */
907 ppc64_elf_toc_reloc, /* special_function */
908 "R_PPC64_TOC16", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 0xffff, /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* 16 bit TOC-relative relocation without overflow. */
915
916 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
917 HOWTO (R_PPC64_TOC16_LO, /* type */
918 0, /* rightshift */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_dont, /* complain_on_overflow */
924 ppc64_elf_toc_reloc, /* special_function */
925 "R_PPC64_TOC16_LO", /* name */
926 FALSE, /* partial_inplace */
927 0, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930
931 /* 16 bit TOC-relative relocation, high 16 bits. */
932
933 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
934 HOWTO (R_PPC64_TOC16_HI, /* type */
935 16, /* rightshift */
936 1, /* size (0 = byte, 1 = short, 2 = long) */
937 16, /* bitsize */
938 FALSE, /* pc_relative */
939 0, /* bitpos */
940 complain_overflow_dont, /* complain_on_overflow */
941 ppc64_elf_toc_reloc, /* special_function */
942 "R_PPC64_TOC16_HI", /* name */
943 FALSE, /* partial_inplace */
944 0, /* src_mask */
945 0xffff, /* dst_mask */
946 FALSE), /* pcrel_offset */
947
948 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
949 contents of the low 16 bits, treated as a signed number, is
950 negative. */
951
952 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
953 HOWTO (R_PPC64_TOC16_HA, /* type */
954 16, /* rightshift */
955 1, /* size (0 = byte, 1 = short, 2 = long) */
956 16, /* bitsize */
957 FALSE, /* pc_relative */
958 0, /* bitpos */
959 complain_overflow_dont, /* complain_on_overflow */
960 ppc64_elf_toc_ha_reloc, /* special_function */
961 "R_PPC64_TOC16_HA", /* name */
962 FALSE, /* partial_inplace */
963 0, /* src_mask */
964 0xffff, /* dst_mask */
965 FALSE), /* pcrel_offset */
966
967 /* 64-bit relocation; insert value of TOC base (.TOC.). */
968
969 /* R_PPC64_TOC 51 doubleword64 .TOC. */
970 HOWTO (R_PPC64_TOC, /* type */
971 0, /* rightshift */
972 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
973 64, /* bitsize */
974 FALSE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_bitfield, /* complain_on_overflow */
977 ppc64_elf_toc64_reloc, /* special_function */
978 "R_PPC64_TOC", /* name */
979 FALSE, /* partial_inplace */
980 0, /* src_mask */
981 ONES (64), /* dst_mask */
982 FALSE), /* pcrel_offset */
983
984 /* Like R_PPC64_GOT16, but also informs the link editor that the
985 value to relocate may (!) refer to a PLT entry which the link
986 editor (a) may replace with the symbol value. If the link editor
987 is unable to fully resolve the symbol, it may (b) create a PLT
988 entry and store the address to the new PLT entry in the GOT.
989 This permits lazy resolution of function symbols at run time.
990 The link editor may also skip all of this and just (c) emit a
991 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
992 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
993 HOWTO (R_PPC64_PLTGOT16, /* type */
994 0, /* rightshift */
995 1, /* size (0 = byte, 1 = short, 2 = long) */
996 16, /* bitsize */
997 FALSE, /* pc_relative */
998 0, /* bitpos */
999 complain_overflow_signed, /* complain_on_overflow */
1000 ppc64_elf_unhandled_reloc, /* special_function */
1001 "R_PPC64_PLTGOT16", /* name */
1002 FALSE, /* partial_inplace */
1003 0, /* src_mask */
1004 0xffff, /* dst_mask */
1005 FALSE), /* pcrel_offset */
1006
1007 /* Like R_PPC64_PLTGOT16, but without overflow. */
1008 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1009 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1010 0, /* rightshift */
1011 1, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_dont, /* complain_on_overflow */
1016 ppc64_elf_unhandled_reloc, /* special_function */
1017 "R_PPC64_PLTGOT16_LO", /* name */
1018 FALSE, /* partial_inplace */
1019 0, /* src_mask */
1020 0xffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1024 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1025 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1026 16, /* rightshift */
1027 1, /* size (0 = byte, 1 = short, 2 = long) */
1028 16, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_dont, /* complain_on_overflow */
1032 ppc64_elf_unhandled_reloc, /* special_function */
1033 "R_PPC64_PLTGOT16_HI", /* name */
1034 FALSE, /* partial_inplace */
1035 0, /* src_mask */
1036 0xffff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1040 1 if the contents of the low 16 bits, treated as a signed number,
1041 is negative. */
1042 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1043 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1044 16, /* rightshift */
1045 1, /* size (0 = byte, 1 = short, 2 = long) */
1046 16, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont,/* complain_on_overflow */
1050 ppc64_elf_unhandled_reloc, /* special_function */
1051 "R_PPC64_PLTGOT16_HA", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xffff, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1058 HOWTO (R_PPC64_ADDR16_DS, /* type */
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_bitfield, /* complain_on_overflow */
1065 bfd_elf_generic_reloc, /* special_function */
1066 "R_PPC64_ADDR16_DS", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xfffc, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont,/* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_LO_DS",/* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_GOT16_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_signed, /* complain_on_overflow */
1095 ppc64_elf_unhandled_reloc, /* special_function */
1096 "R_PPC64_GOT16_DS", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_LO_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_PLT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_bitfield, /* complain_on_overflow */
1140 ppc64_elf_sectoff_reloc, /* special_function */
1141 "R_PPC64_SECTOFF_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_dont, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_LO_DS",/* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_TOC16_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_signed, /* complain_on_overflow */
1170 ppc64_elf_toc_reloc, /* special_function */
1171 "R_PPC64_TOC16_DS", /* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_dont, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_LO_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1193 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1194 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1195 0, /* rightshift */
1196 1, /* size (0 = byte, 1 = short, 2 = long) */
1197 16, /* bitsize */
1198 FALSE, /* pc_relative */
1199 0, /* bitpos */
1200 complain_overflow_signed, /* complain_on_overflow */
1201 ppc64_elf_unhandled_reloc, /* special_function */
1202 "R_PPC64_PLTGOT16_DS", /* name */
1203 FALSE, /* partial_inplace */
1204 0, /* src_mask */
1205 0xfffc, /* dst_mask */
1206 FALSE), /* pcrel_offset */
1207
1208 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1209 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1210 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1211 0, /* rightshift */
1212 1, /* size (0 = byte, 1 = short, 2 = long) */
1213 16, /* bitsize */
1214 FALSE, /* pc_relative */
1215 0, /* bitpos */
1216 complain_overflow_dont, /* complain_on_overflow */
1217 ppc64_elf_unhandled_reloc, /* special_function */
1218 "R_PPC64_PLTGOT16_LO_DS",/* name */
1219 FALSE, /* partial_inplace */
1220 0, /* src_mask */
1221 0xfffc, /* dst_mask */
1222 FALSE), /* pcrel_offset */
1223
1224 /* Marker reloc for TLS. */
1225 HOWTO (R_PPC64_TLS,
1226 0, /* rightshift */
1227 2, /* size (0 = byte, 1 = short, 2 = long) */
1228 32, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 bfd_elf_generic_reloc, /* special_function */
1233 "R_PPC64_TLS", /* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Computes the load module index of the load module that contains the
1240 definition of its TLS sym. */
1241 HOWTO (R_PPC64_DTPMOD64,
1242 0, /* rightshift */
1243 4, /* size (0 = byte, 1 = short, 2 = long) */
1244 64, /* bitsize */
1245 FALSE, /* pc_relative */
1246 0, /* bitpos */
1247 complain_overflow_dont, /* complain_on_overflow */
1248 ppc64_elf_unhandled_reloc, /* special_function */
1249 "R_PPC64_DTPMOD64", /* name */
1250 FALSE, /* partial_inplace */
1251 0, /* src_mask */
1252 ONES (64), /* dst_mask */
1253 FALSE), /* pcrel_offset */
1254
1255 /* Computes a dtv-relative displacement, the difference between the value
1256 of sym+add and the base address of the thread-local storage block that
1257 contains the definition of sym, minus 0x8000. */
1258 HOWTO (R_PPC64_DTPREL64,
1259 0, /* rightshift */
1260 4, /* size (0 = byte, 1 = short, 2 = long) */
1261 64, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_dont, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_DTPREL64", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 ONES (64), /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* A 16 bit dtprel reloc. */
1273 HOWTO (R_PPC64_DTPREL16,
1274 0, /* rightshift */
1275 1, /* size (0 = byte, 1 = short, 2 = long) */
1276 16, /* bitsize */
1277 FALSE, /* pc_relative */
1278 0, /* bitpos */
1279 complain_overflow_signed, /* complain_on_overflow */
1280 ppc64_elf_unhandled_reloc, /* special_function */
1281 "R_PPC64_DTPREL16", /* name */
1282 FALSE, /* partial_inplace */
1283 0, /* src_mask */
1284 0xffff, /* dst_mask */
1285 FALSE), /* pcrel_offset */
1286
1287 /* Like DTPREL16, but no overflow. */
1288 HOWTO (R_PPC64_DTPREL16_LO,
1289 0, /* rightshift */
1290 1, /* size (0 = byte, 1 = short, 2 = long) */
1291 16, /* bitsize */
1292 FALSE, /* pc_relative */
1293 0, /* bitpos */
1294 complain_overflow_dont, /* complain_on_overflow */
1295 ppc64_elf_unhandled_reloc, /* special_function */
1296 "R_PPC64_DTPREL16_LO", /* name */
1297 FALSE, /* partial_inplace */
1298 0, /* src_mask */
1299 0xffff, /* dst_mask */
1300 FALSE), /* pcrel_offset */
1301
1302 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1303 HOWTO (R_PPC64_DTPREL16_HI,
1304 16, /* rightshift */
1305 1, /* size (0 = byte, 1 = short, 2 = long) */
1306 16, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 ppc64_elf_unhandled_reloc, /* special_function */
1311 "R_PPC64_DTPREL16_HI", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0xffff, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1318 HOWTO (R_PPC64_DTPREL16_HA,
1319 16, /* rightshift */
1320 1, /* size (0 = byte, 1 = short, 2 = long) */
1321 16, /* bitsize */
1322 FALSE, /* pc_relative */
1323 0, /* bitpos */
1324 complain_overflow_dont, /* complain_on_overflow */
1325 ppc64_elf_unhandled_reloc, /* special_function */
1326 "R_PPC64_DTPREL16_HA", /* name */
1327 FALSE, /* partial_inplace */
1328 0, /* src_mask */
1329 0xffff, /* dst_mask */
1330 FALSE), /* pcrel_offset */
1331
1332 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1333 HOWTO (R_PPC64_DTPREL16_HIGHER,
1334 32, /* rightshift */
1335 1, /* size (0 = byte, 1 = short, 2 = long) */
1336 16, /* bitsize */
1337 FALSE, /* pc_relative */
1338 0, /* bitpos */
1339 complain_overflow_dont, /* complain_on_overflow */
1340 ppc64_elf_unhandled_reloc, /* special_function */
1341 "R_PPC64_DTPREL16_HIGHER", /* name */
1342 FALSE, /* partial_inplace */
1343 0, /* src_mask */
1344 0xffff, /* dst_mask */
1345 FALSE), /* pcrel_offset */
1346
1347 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1348 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1349 32, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_dont, /* complain_on_overflow */
1355 ppc64_elf_unhandled_reloc, /* special_function */
1356 "R_PPC64_DTPREL16_HIGHERA", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1363 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1364 48, /* rightshift */
1365 1, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_dont, /* complain_on_overflow */
1370 ppc64_elf_unhandled_reloc, /* special_function */
1371 "R_PPC64_DTPREL16_HIGHEST", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1378 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1379 48, /* rightshift */
1380 1, /* size (0 = byte, 1 = short, 2 = long) */
1381 16, /* bitsize */
1382 FALSE, /* pc_relative */
1383 0, /* bitpos */
1384 complain_overflow_dont, /* complain_on_overflow */
1385 ppc64_elf_unhandled_reloc, /* special_function */
1386 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1387 FALSE, /* partial_inplace */
1388 0, /* src_mask */
1389 0xffff, /* dst_mask */
1390 FALSE), /* pcrel_offset */
1391
1392 /* Like DTPREL16, but for insns with a DS field. */
1393 HOWTO (R_PPC64_DTPREL16_DS,
1394 0, /* rightshift */
1395 1, /* size (0 = byte, 1 = short, 2 = long) */
1396 16, /* bitsize */
1397 FALSE, /* pc_relative */
1398 0, /* bitpos */
1399 complain_overflow_signed, /* complain_on_overflow */
1400 ppc64_elf_unhandled_reloc, /* special_function */
1401 "R_PPC64_DTPREL16_DS", /* name */
1402 FALSE, /* partial_inplace */
1403 0, /* src_mask */
1404 0xfffc, /* dst_mask */
1405 FALSE), /* pcrel_offset */
1406
1407 /* Like DTPREL16_DS, but no overflow. */
1408 HOWTO (R_PPC64_DTPREL16_LO_DS,
1409 0, /* rightshift */
1410 1, /* size (0 = byte, 1 = short, 2 = long) */
1411 16, /* bitsize */
1412 FALSE, /* pc_relative */
1413 0, /* bitpos */
1414 complain_overflow_dont, /* complain_on_overflow */
1415 ppc64_elf_unhandled_reloc, /* special_function */
1416 "R_PPC64_DTPREL16_LO_DS", /* name */
1417 FALSE, /* partial_inplace */
1418 0, /* src_mask */
1419 0xfffc, /* dst_mask */
1420 FALSE), /* pcrel_offset */
1421
1422 /* Computes a tp-relative displacement, the difference between the value of
1423 sym+add and the value of the thread pointer (r13). */
1424 HOWTO (R_PPC64_TPREL64,
1425 0, /* rightshift */
1426 4, /* size (0 = byte, 1 = short, 2 = long) */
1427 64, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_dont, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_TPREL64", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 ONES (64), /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* A 16 bit tprel reloc. */
1439 HOWTO (R_PPC64_TPREL16,
1440 0, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_signed, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_TPREL16", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like TPREL16, but no overflow. */
1454 HOWTO (R_PPC64_TPREL16_LO,
1455 0, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_TPREL16_LO", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like TPREL16_LO, but next higher group of 16 bits. */
1469 HOWTO (R_PPC64_TPREL16_HI,
1470 16, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_TPREL16_HI", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like TPREL16_HI, but adjust for low 16 bits. */
1484 HOWTO (R_PPC64_TPREL16_HA,
1485 16, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_TPREL16_HA", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like TPREL16_HI, but next higher group of 16 bits. */
1499 HOWTO (R_PPC64_TPREL16_HIGHER,
1500 32, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_dont, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_TPREL16_HIGHER", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1514 HOWTO (R_PPC64_TPREL16_HIGHERA,
1515 32, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_TPREL16_HIGHERA", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xffff, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1529 HOWTO (R_PPC64_TPREL16_HIGHEST,
1530 48, /* rightshift */
1531 1, /* size (0 = byte, 1 = short, 2 = long) */
1532 16, /* bitsize */
1533 FALSE, /* pc_relative */
1534 0, /* bitpos */
1535 complain_overflow_dont, /* complain_on_overflow */
1536 ppc64_elf_unhandled_reloc, /* special_function */
1537 "R_PPC64_TPREL16_HIGHEST", /* name */
1538 FALSE, /* partial_inplace */
1539 0, /* src_mask */
1540 0xffff, /* dst_mask */
1541 FALSE), /* pcrel_offset */
1542
1543 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1544 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1545 48, /* rightshift */
1546 1, /* size (0 = byte, 1 = short, 2 = long) */
1547 16, /* bitsize */
1548 FALSE, /* pc_relative */
1549 0, /* bitpos */
1550 complain_overflow_dont, /* complain_on_overflow */
1551 ppc64_elf_unhandled_reloc, /* special_function */
1552 "R_PPC64_TPREL16_HIGHESTA", /* name */
1553 FALSE, /* partial_inplace */
1554 0, /* src_mask */
1555 0xffff, /* dst_mask */
1556 FALSE), /* pcrel_offset */
1557
1558 /* Like TPREL16, but for insns with a DS field. */
1559 HOWTO (R_PPC64_TPREL16_DS,
1560 0, /* rightshift */
1561 1, /* size (0 = byte, 1 = short, 2 = long) */
1562 16, /* bitsize */
1563 FALSE, /* pc_relative */
1564 0, /* bitpos */
1565 complain_overflow_signed, /* complain_on_overflow */
1566 ppc64_elf_unhandled_reloc, /* special_function */
1567 "R_PPC64_TPREL16_DS", /* name */
1568 FALSE, /* partial_inplace */
1569 0, /* src_mask */
1570 0xfffc, /* dst_mask */
1571 FALSE), /* pcrel_offset */
1572
1573 /* Like TPREL16_DS, but no overflow. */
1574 HOWTO (R_PPC64_TPREL16_LO_DS,
1575 0, /* rightshift */
1576 1, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_dont, /* complain_on_overflow */
1581 ppc64_elf_unhandled_reloc, /* special_function */
1582 "R_PPC64_TPREL16_LO_DS", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xfffc, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1589 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1590 to the first entry relative to the TOC base (r2). */
1591 HOWTO (R_PPC64_GOT_TLSGD16,
1592 0, /* rightshift */
1593 1, /* size (0 = byte, 1 = short, 2 = long) */
1594 16, /* bitsize */
1595 FALSE, /* pc_relative */
1596 0, /* bitpos */
1597 complain_overflow_signed, /* complain_on_overflow */
1598 ppc64_elf_unhandled_reloc, /* special_function */
1599 "R_PPC64_GOT_TLSGD16", /* name */
1600 FALSE, /* partial_inplace */
1601 0, /* src_mask */
1602 0xffff, /* dst_mask */
1603 FALSE), /* pcrel_offset */
1604
1605 /* Like GOT_TLSGD16, but no overflow. */
1606 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1607 0, /* rightshift */
1608 1, /* size (0 = byte, 1 = short, 2 = long) */
1609 16, /* bitsize */
1610 FALSE, /* pc_relative */
1611 0, /* bitpos */
1612 complain_overflow_dont, /* complain_on_overflow */
1613 ppc64_elf_unhandled_reloc, /* special_function */
1614 "R_PPC64_GOT_TLSGD16_LO", /* name */
1615 FALSE, /* partial_inplace */
1616 0, /* src_mask */
1617 0xffff, /* dst_mask */
1618 FALSE), /* pcrel_offset */
1619
1620 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1621 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1622 16, /* rightshift */
1623 1, /* size (0 = byte, 1 = short, 2 = long) */
1624 16, /* bitsize */
1625 FALSE, /* pc_relative */
1626 0, /* bitpos */
1627 complain_overflow_dont, /* complain_on_overflow */
1628 ppc64_elf_unhandled_reloc, /* special_function */
1629 "R_PPC64_GOT_TLSGD16_HI", /* name */
1630 FALSE, /* partial_inplace */
1631 0, /* src_mask */
1632 0xffff, /* dst_mask */
1633 FALSE), /* pcrel_offset */
1634
1635 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1636 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1637 16, /* rightshift */
1638 1, /* size (0 = byte, 1 = short, 2 = long) */
1639 16, /* bitsize */
1640 FALSE, /* pc_relative */
1641 0, /* bitpos */
1642 complain_overflow_dont, /* complain_on_overflow */
1643 ppc64_elf_unhandled_reloc, /* special_function */
1644 "R_PPC64_GOT_TLSGD16_HA", /* name */
1645 FALSE, /* partial_inplace */
1646 0, /* src_mask */
1647 0xffff, /* dst_mask */
1648 FALSE), /* pcrel_offset */
1649
1650 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1651 with values (sym+add)@dtpmod and zero, and computes the offset to the
1652 first entry relative to the TOC base (r2). */
1653 HOWTO (R_PPC64_GOT_TLSLD16,
1654 0, /* rightshift */
1655 1, /* size (0 = byte, 1 = short, 2 = long) */
1656 16, /* bitsize */
1657 FALSE, /* pc_relative */
1658 0, /* bitpos */
1659 complain_overflow_signed, /* complain_on_overflow */
1660 ppc64_elf_unhandled_reloc, /* special_function */
1661 "R_PPC64_GOT_TLSLD16", /* name */
1662 FALSE, /* partial_inplace */
1663 0, /* src_mask */
1664 0xffff, /* dst_mask */
1665 FALSE), /* pcrel_offset */
1666
1667 /* Like GOT_TLSLD16, but no overflow. */
1668 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1669 0, /* rightshift */
1670 1, /* size (0 = byte, 1 = short, 2 = long) */
1671 16, /* bitsize */
1672 FALSE, /* pc_relative */
1673 0, /* bitpos */
1674 complain_overflow_dont, /* complain_on_overflow */
1675 ppc64_elf_unhandled_reloc, /* special_function */
1676 "R_PPC64_GOT_TLSLD16_LO", /* name */
1677 FALSE, /* partial_inplace */
1678 0, /* src_mask */
1679 0xffff, /* dst_mask */
1680 FALSE), /* pcrel_offset */
1681
1682 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1683 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1684 16, /* rightshift */
1685 1, /* size (0 = byte, 1 = short, 2 = long) */
1686 16, /* bitsize */
1687 FALSE, /* pc_relative */
1688 0, /* bitpos */
1689 complain_overflow_dont, /* complain_on_overflow */
1690 ppc64_elf_unhandled_reloc, /* special_function */
1691 "R_PPC64_GOT_TLSLD16_HI", /* name */
1692 FALSE, /* partial_inplace */
1693 0, /* src_mask */
1694 0xffff, /* dst_mask */
1695 FALSE), /* pcrel_offset */
1696
1697 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1698 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1699 16, /* rightshift */
1700 1, /* size (0 = byte, 1 = short, 2 = long) */
1701 16, /* bitsize */
1702 FALSE, /* pc_relative */
1703 0, /* bitpos */
1704 complain_overflow_dont, /* complain_on_overflow */
1705 ppc64_elf_unhandled_reloc, /* special_function */
1706 "R_PPC64_GOT_TLSLD16_HA", /* name */
1707 FALSE, /* partial_inplace */
1708 0, /* src_mask */
1709 0xffff, /* dst_mask */
1710 FALSE), /* pcrel_offset */
1711
1712 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1713 the offset to the entry relative to the TOC base (r2). */
1714 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1715 0, /* rightshift */
1716 1, /* size (0 = byte, 1 = short, 2 = long) */
1717 16, /* bitsize */
1718 FALSE, /* pc_relative */
1719 0, /* bitpos */
1720 complain_overflow_signed, /* complain_on_overflow */
1721 ppc64_elf_unhandled_reloc, /* special_function */
1722 "R_PPC64_GOT_DTPREL16_DS", /* name */
1723 FALSE, /* partial_inplace */
1724 0, /* src_mask */
1725 0xfffc, /* dst_mask */
1726 FALSE), /* pcrel_offset */
1727
1728 /* Like GOT_DTPREL16_DS, but no overflow. */
1729 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1730 0, /* rightshift */
1731 1, /* size (0 = byte, 1 = short, 2 = long) */
1732 16, /* bitsize */
1733 FALSE, /* pc_relative */
1734 0, /* bitpos */
1735 complain_overflow_dont, /* complain_on_overflow */
1736 ppc64_elf_unhandled_reloc, /* special_function */
1737 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1738 FALSE, /* partial_inplace */
1739 0, /* src_mask */
1740 0xfffc, /* dst_mask */
1741 FALSE), /* pcrel_offset */
1742
1743 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1744 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1745 16, /* rightshift */
1746 1, /* size (0 = byte, 1 = short, 2 = long) */
1747 16, /* bitsize */
1748 FALSE, /* pc_relative */
1749 0, /* bitpos */
1750 complain_overflow_dont, /* complain_on_overflow */
1751 ppc64_elf_unhandled_reloc, /* special_function */
1752 "R_PPC64_GOT_DTPREL16_HI", /* name */
1753 FALSE, /* partial_inplace */
1754 0, /* src_mask */
1755 0xffff, /* dst_mask */
1756 FALSE), /* pcrel_offset */
1757
1758 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1759 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1760 16, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_dont, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_DTPREL16_HA", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xffff, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1774 offset to the entry relative to the TOC base (r2). */
1775 HOWTO (R_PPC64_GOT_TPREL16_DS,
1776 0, /* rightshift */
1777 1, /* size (0 = byte, 1 = short, 2 = long) */
1778 16, /* bitsize */
1779 FALSE, /* pc_relative */
1780 0, /* bitpos */
1781 complain_overflow_signed, /* complain_on_overflow */
1782 ppc64_elf_unhandled_reloc, /* special_function */
1783 "R_PPC64_GOT_TPREL16_DS", /* name */
1784 FALSE, /* partial_inplace */
1785 0, /* src_mask */
1786 0xfffc, /* dst_mask */
1787 FALSE), /* pcrel_offset */
1788
1789 /* Like GOT_TPREL16_DS, but no overflow. */
1790 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1791 0, /* rightshift */
1792 1, /* size (0 = byte, 1 = short, 2 = long) */
1793 16, /* bitsize */
1794 FALSE, /* pc_relative */
1795 0, /* bitpos */
1796 complain_overflow_dont, /* complain_on_overflow */
1797 ppc64_elf_unhandled_reloc, /* special_function */
1798 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1799 FALSE, /* partial_inplace */
1800 0, /* src_mask */
1801 0xfffc, /* dst_mask */
1802 FALSE), /* pcrel_offset */
1803
1804 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1805 HOWTO (R_PPC64_GOT_TPREL16_HI,
1806 16, /* rightshift */
1807 1, /* size (0 = byte, 1 = short, 2 = long) */
1808 16, /* bitsize */
1809 FALSE, /* pc_relative */
1810 0, /* bitpos */
1811 complain_overflow_dont, /* complain_on_overflow */
1812 ppc64_elf_unhandled_reloc, /* special_function */
1813 "R_PPC64_GOT_TPREL16_HI", /* name */
1814 FALSE, /* partial_inplace */
1815 0, /* src_mask */
1816 0xffff, /* dst_mask */
1817 FALSE), /* pcrel_offset */
1818
1819 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1820 HOWTO (R_PPC64_GOT_TPREL16_HA,
1821 16, /* rightshift */
1822 1, /* size (0 = byte, 1 = short, 2 = long) */
1823 16, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_dont, /* complain_on_overflow */
1827 ppc64_elf_unhandled_reloc, /* special_function */
1828 "R_PPC64_GOT_TPREL16_HA", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0xffff, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* GNU extension to record C++ vtable hierarchy. */
1835 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1836 0, /* rightshift */
1837 0, /* size (0 = byte, 1 = short, 2 = long) */
1838 0, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 NULL, /* special_function */
1843 "R_PPC64_GNU_VTINHERIT", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* GNU extension to record C++ vtable member usage. */
1850 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1851 0, /* rightshift */
1852 0, /* size (0 = byte, 1 = short, 2 = long) */
1853 0, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_dont, /* complain_on_overflow */
1857 NULL, /* special_function */
1858 "R_PPC64_GNU_VTENTRY", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863 };
1864
1865 \f
1866 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1867 be done. */
1868
1869 static void
1870 ppc_howto_init (void)
1871 {
1872 unsigned int i, type;
1873
1874 for (i = 0;
1875 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1876 i++)
1877 {
1878 type = ppc64_elf_howto_raw[i].type;
1879 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1880 / sizeof (ppc64_elf_howto_table[0])));
1881 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1882 }
1883 }
1884
1885 static reloc_howto_type *
1886 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1887 bfd_reloc_code_real_type code)
1888 {
1889 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1890
1891 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1892 /* Initialize howto table if needed. */
1893 ppc_howto_init ();
1894
1895 switch (code)
1896 {
1897 default:
1898 return NULL;
1899
1900 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1901 break;
1902 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1903 break;
1904 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1905 break;
1906 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1907 break;
1908 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1909 break;
1910 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1911 break;
1912 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1913 break;
1914 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1915 break;
1916 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1917 break;
1918 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1919 break;
1920 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1921 break;
1922 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1923 break;
1924 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1925 break;
1926 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1927 break;
1928 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1929 break;
1930 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1931 break;
1932 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1933 break;
1934 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1935 break;
1936 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1937 break;
1938 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1939 break;
1940 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1941 break;
1942 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1943 break;
1944 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1945 break;
1946 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1947 break;
1948 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1949 break;
1950 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1951 break;
1952 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1953 break;
1954 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1955 break;
1956 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1957 break;
1958 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1959 break;
1960 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1961 break;
1962 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1963 break;
1964 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1965 break;
1966 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1967 break;
1968 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1969 break;
1970 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1971 break;
1972 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1973 break;
1974 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1975 break;
1976 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1977 break;
1978 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1979 break;
1980 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1981 break;
1982 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1983 break;
1984 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1985 break;
1986 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1987 break;
1988 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1989 break;
1990 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1991 break;
1992 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1993 break;
1994 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1995 break;
1996 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1997 break;
1998 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1999 break;
2000 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2001 break;
2002 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2003 break;
2004 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2005 break;
2006 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2007 break;
2008 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2009 break;
2010 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2011 break;
2012 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2013 break;
2014 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2015 break;
2016 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2017 break;
2018 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2019 break;
2020 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2021 break;
2022 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2023 break;
2024 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2025 break;
2026 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2027 break;
2028 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2029 break;
2030 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2031 break;
2032 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2033 break;
2034 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2035 break;
2036 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2037 break;
2038 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2039 break;
2040 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2041 break;
2042 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2043 break;
2044 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2045 break;
2046 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2047 break;
2048 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2049 break;
2050 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2051 break;
2052 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2053 break;
2054 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2065 break;
2066 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2067 break;
2068 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2069 break;
2070 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2071 break;
2072 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2073 break;
2074 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2075 break;
2076 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2077 break;
2078 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2079 break;
2080 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2081 break;
2082 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2083 break;
2084 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2085 break;
2086 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2087 break;
2088 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2089 break;
2090 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2091 break;
2092 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2093 break;
2094 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2095 break;
2096 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2097 break;
2098 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2099 break;
2100 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2101 break;
2102 }
2103
2104 return ppc64_elf_howto_table[r];
2105 };
2106
2107 /* Set the howto pointer for a PowerPC ELF reloc. */
2108
2109 static void
2110 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2111 Elf_Internal_Rela *dst)
2112 {
2113 unsigned int type;
2114
2115 /* Initialize howto table if needed. */
2116 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2117 ppc_howto_init ();
2118
2119 type = ELF64_R_TYPE (dst->r_info);
2120 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2121 / sizeof (ppc64_elf_howto_table[0])));
2122 cache_ptr->howto = ppc64_elf_howto_table[type];
2123 }
2124
2125 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2126
2127 static bfd_reloc_status_type
2128 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2129 void *data, asection *input_section,
2130 bfd *output_bfd, char **error_message)
2131 {
2132 /* If this is a relocatable link (output_bfd test tells us), just
2133 call the generic function. Any adjustment will be done at final
2134 link time. */
2135 if (output_bfd != NULL)
2136 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2137 input_section, output_bfd, error_message);
2138
2139 /* Adjust the addend for sign extension of the low 16 bits.
2140 We won't actually be using the low 16 bits, so trashing them
2141 doesn't matter. */
2142 reloc_entry->addend += 0x8000;
2143 return bfd_reloc_continue;
2144 }
2145
2146 static bfd_reloc_status_type
2147 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2148 void *data, asection *input_section,
2149 bfd *output_bfd, char **error_message)
2150 {
2151 if (output_bfd != NULL)
2152 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2153 input_section, output_bfd, error_message);
2154
2155 if (strcmp (symbol->section->name, ".opd") == 0
2156 && (symbol->section->owner->flags & DYNAMIC) == 0)
2157 {
2158 bfd_vma dest = opd_entry_value (symbol->section,
2159 symbol->value + reloc_entry->addend,
2160 NULL, NULL);
2161 if (dest != (bfd_vma) -1)
2162 reloc_entry->addend = dest - (symbol->value
2163 + symbol->section->output_section->vma
2164 + symbol->section->output_offset);
2165 }
2166 return bfd_reloc_continue;
2167 }
2168
2169 static bfd_reloc_status_type
2170 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2171 void *data, asection *input_section,
2172 bfd *output_bfd, char **error_message)
2173 {
2174 long insn;
2175 enum elf_ppc64_reloc_type r_type;
2176 bfd_size_type octets;
2177 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2178 bfd_boolean is_power4 = FALSE;
2179
2180 /* If this is a relocatable link (output_bfd test tells us), just
2181 call the generic function. Any adjustment will be done at final
2182 link time. */
2183 if (output_bfd != NULL)
2184 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2185 input_section, output_bfd, error_message);
2186
2187 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2188 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2189 insn &= ~(0x01 << 21);
2190 r_type = reloc_entry->howto->type;
2191 if (r_type == R_PPC64_ADDR14_BRTAKEN
2192 || r_type == R_PPC64_REL14_BRTAKEN)
2193 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2194
2195 if (is_power4)
2196 {
2197 /* Set 'a' bit. This is 0b00010 in BO field for branch
2198 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2199 for branch on CTR insns (BO == 1a00t or 1a01t). */
2200 if ((insn & (0x14 << 21)) == (0x04 << 21))
2201 insn |= 0x02 << 21;
2202 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2203 insn |= 0x08 << 21;
2204 else
2205 goto out;
2206 }
2207 else
2208 {
2209 bfd_vma target = 0;
2210 bfd_vma from;
2211
2212 if (!bfd_is_com_section (symbol->section))
2213 target = symbol->value;
2214 target += symbol->section->output_section->vma;
2215 target += symbol->section->output_offset;
2216 target += reloc_entry->addend;
2217
2218 from = (reloc_entry->address
2219 + input_section->output_offset
2220 + input_section->output_section->vma);
2221
2222 /* Invert 'y' bit if not the default. */
2223 if ((bfd_signed_vma) (target - from) < 0)
2224 insn ^= 0x01 << 21;
2225 }
2226 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2227 out:
2228 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2229 input_section, output_bfd, error_message);
2230 }
2231
2232 static bfd_reloc_status_type
2233 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2234 void *data, asection *input_section,
2235 bfd *output_bfd, char **error_message)
2236 {
2237 /* If this is a relocatable link (output_bfd test tells us), just
2238 call the generic function. Any adjustment will be done at final
2239 link time. */
2240 if (output_bfd != NULL)
2241 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2242 input_section, output_bfd, error_message);
2243
2244 /* Subtract the symbol section base address. */
2245 reloc_entry->addend -= symbol->section->output_section->vma;
2246 return bfd_reloc_continue;
2247 }
2248
2249 static bfd_reloc_status_type
2250 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2251 void *data, asection *input_section,
2252 bfd *output_bfd, char **error_message)
2253 {
2254 /* If this is a relocatable link (output_bfd test tells us), just
2255 call the generic function. Any adjustment will be done at final
2256 link time. */
2257 if (output_bfd != NULL)
2258 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2259 input_section, output_bfd, error_message);
2260
2261 /* Subtract the symbol section base address. */
2262 reloc_entry->addend -= symbol->section->output_section->vma;
2263
2264 /* Adjust the addend for sign extension of the low 16 bits. */
2265 reloc_entry->addend += 0x8000;
2266 return bfd_reloc_continue;
2267 }
2268
2269 static bfd_reloc_status_type
2270 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2271 void *data, asection *input_section,
2272 bfd *output_bfd, char **error_message)
2273 {
2274 bfd_vma TOCstart;
2275
2276 /* If this is a relocatable link (output_bfd test tells us), just
2277 call the generic function. Any adjustment will be done at final
2278 link time. */
2279 if (output_bfd != NULL)
2280 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2281 input_section, output_bfd, error_message);
2282
2283 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2284 if (TOCstart == 0)
2285 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2286
2287 /* Subtract the TOC base address. */
2288 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2289 return bfd_reloc_continue;
2290 }
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 bfd_vma TOCstart;
2298
2299 /* If this is a relocatable link (output_bfd test tells us), just
2300 call the generic function. Any adjustment will be done at final
2301 link time. */
2302 if (output_bfd != NULL)
2303 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2304 input_section, output_bfd, error_message);
2305
2306 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2307 if (TOCstart == 0)
2308 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2309
2310 /* Subtract the TOC base address. */
2311 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2312
2313 /* Adjust the addend for sign extension of the low 16 bits. */
2314 reloc_entry->addend += 0x8000;
2315 return bfd_reloc_continue;
2316 }
2317
2318 static bfd_reloc_status_type
2319 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2320 void *data, asection *input_section,
2321 bfd *output_bfd, char **error_message)
2322 {
2323 bfd_vma TOCstart;
2324 bfd_size_type octets;
2325
2326 /* If this is a relocatable link (output_bfd test tells us), just
2327 call the generic function. Any adjustment will be done at final
2328 link time. */
2329 if (output_bfd != NULL)
2330 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2331 input_section, output_bfd, error_message);
2332
2333 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2334 if (TOCstart == 0)
2335 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2336
2337 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2338 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2339 return bfd_reloc_ok;
2340 }
2341
2342 static bfd_reloc_status_type
2343 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2344 void *data, asection *input_section,
2345 bfd *output_bfd, char **error_message)
2346 {
2347 /* If this is a relocatable link (output_bfd test tells us), just
2348 call the generic function. Any adjustment will be done at final
2349 link time. */
2350 if (output_bfd != NULL)
2351 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2352 input_section, output_bfd, error_message);
2353
2354 if (error_message != NULL)
2355 {
2356 static char buf[60];
2357 sprintf (buf, "generic linker can't handle %s",
2358 reloc_entry->howto->name);
2359 *error_message = buf;
2360 }
2361 return bfd_reloc_dangerous;
2362 }
2363
2364 struct ppc64_elf_obj_tdata
2365 {
2366 struct elf_obj_tdata elf;
2367
2368 /* Shortcuts to dynamic linker sections. */
2369 asection *got;
2370 asection *relgot;
2371
2372 /* Used during garbage collection. We attach global symbols defined
2373 on removed .opd entries to this section so that the sym is removed. */
2374 asection *deleted_section;
2375
2376 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2377 sections means we potentially need one of these for each input bfd. */
2378 union {
2379 bfd_signed_vma refcount;
2380 bfd_vma offset;
2381 } tlsld_got;
2382
2383 /* A copy of relocs before they are modified for --emit-relocs. */
2384 Elf_Internal_Rela *opd_relocs;
2385 };
2386
2387 #define ppc64_elf_tdata(bfd) \
2388 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2389
2390 #define ppc64_tlsld_got(bfd) \
2391 (&ppc64_elf_tdata (bfd)->tlsld_got)
2392
2393 /* Override the generic function because we store some extras. */
2394
2395 static bfd_boolean
2396 ppc64_elf_mkobject (bfd *abfd)
2397 {
2398 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2399 abfd->tdata.any = bfd_zalloc (abfd, amt);
2400 if (abfd->tdata.any == NULL)
2401 return FALSE;
2402 return TRUE;
2403 }
2404
2405 /* Return 1 if target is one of ours. */
2406
2407 static bfd_boolean
2408 is_ppc64_elf_target (const struct bfd_target *targ)
2409 {
2410 extern const bfd_target bfd_elf64_powerpc_vec;
2411 extern const bfd_target bfd_elf64_powerpcle_vec;
2412
2413 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2414 }
2415
2416 /* Fix bad default arch selected for a 64 bit input bfd when the
2417 default is 32 bit. */
2418
2419 static bfd_boolean
2420 ppc64_elf_object_p (bfd *abfd)
2421 {
2422 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2423 {
2424 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2425
2426 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2427 {
2428 /* Relies on arch after 32 bit default being 64 bit default. */
2429 abfd->arch_info = abfd->arch_info->next;
2430 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2431 }
2432 }
2433 return TRUE;
2434 }
2435
2436 /* Support for core dump NOTE sections. */
2437
2438 static bfd_boolean
2439 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2440 {
2441 size_t offset, size;
2442
2443 if (note->descsz != 504)
2444 return FALSE;
2445
2446 /* pr_cursig */
2447 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2448
2449 /* pr_pid */
2450 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2451
2452 /* pr_reg */
2453 offset = 112;
2454 size = 384;
2455
2456 /* Make a ".reg/999" section. */
2457 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2458 size, note->descpos + offset);
2459 }
2460
2461 static bfd_boolean
2462 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2463 {
2464 if (note->descsz != 136)
2465 return FALSE;
2466
2467 elf_tdata (abfd)->core_program
2468 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2469 elf_tdata (abfd)->core_command
2470 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2471
2472 return TRUE;
2473 }
2474
2475 /* Merge backend specific data from an object file to the output
2476 object file when linking. */
2477
2478 static bfd_boolean
2479 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2480 {
2481 /* Check if we have the same endianess. */
2482 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2483 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2484 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2485 {
2486 const char *msg;
2487
2488 if (bfd_big_endian (ibfd))
2489 msg = _("%B: compiled for a big endian system "
2490 "and target is little endian");
2491 else
2492 msg = _("%B: compiled for a little endian system "
2493 "and target is big endian");
2494
2495 (*_bfd_error_handler) (msg, ibfd);
2496
2497 bfd_set_error (bfd_error_wrong_format);
2498 return FALSE;
2499 }
2500
2501 return TRUE;
2502 }
2503
2504 /* Add extra PPC sections. */
2505
2506 static struct bfd_elf_special_section const
2507 ppc64_special_sections_p[]=
2508 {
2509 { ".plt", 4, 0, SHT_NOBITS, 0 },
2510 { NULL, 0, 0, 0, 0 }
2511 };
2512
2513 static struct bfd_elf_special_section const
2514 ppc64_special_sections_s[]=
2515 {
2516 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2517 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2518 { NULL, 0, 0, 0, 0 }
2519 };
2520
2521 static struct bfd_elf_special_section const
2522 ppc64_special_sections_t[]=
2523 {
2524 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2525 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2526 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2527 { NULL, 0, 0, 0, 0 }
2528 };
2529
2530 static struct bfd_elf_special_section const *
2531 ppc64_elf_special_sections[27]=
2532 {
2533 NULL, /* 'a' */
2534 NULL, /* 'b' */
2535 NULL, /* 'c' */
2536 NULL, /* 'd' */
2537 NULL, /* 'e' */
2538 NULL, /* 'f' */
2539 NULL, /* 'g' */
2540 NULL, /* 'h' */
2541 NULL, /* 'i' */
2542 NULL, /* 'j' */
2543 NULL, /* 'k' */
2544 NULL, /* 'l' */
2545 NULL, /* 'm' */
2546 NULL, /* 'n' */
2547 NULL, /* 'o' */
2548 ppc64_special_sections_p, /* 'p' */
2549 NULL, /* 'q' */
2550 NULL, /* 'r' */
2551 ppc64_special_sections_s, /* 's' */
2552 ppc64_special_sections_t, /* 't' */
2553 NULL, /* 'u' */
2554 NULL, /* 'v' */
2555 NULL, /* 'w' */
2556 NULL, /* 'x' */
2557 NULL, /* 'y' */
2558 NULL, /* 'z' */
2559 NULL /* other */
2560 };
2561
2562 struct _ppc64_elf_section_data
2563 {
2564 struct bfd_elf_section_data elf;
2565
2566 /* An array with one entry for each opd function descriptor. */
2567 union
2568 {
2569 /* Points to the function code section for local opd entries. */
2570 asection **func_sec;
2571 /* After editing .opd, adjust references to opd local syms. */
2572 long *adjust;
2573 } opd;
2574
2575 /* An array for toc sections, indexed by offset/8.
2576 Specifies the relocation symbol index used at a given toc offset. */
2577 unsigned *t_symndx;
2578 };
2579
2580 #define ppc64_elf_section_data(sec) \
2581 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2582
2583 static bfd_boolean
2584 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2585 {
2586 struct _ppc64_elf_section_data *sdata;
2587 bfd_size_type amt = sizeof (*sdata);
2588
2589 sdata = bfd_zalloc (abfd, amt);
2590 if (sdata == NULL)
2591 return FALSE;
2592 sec->used_by_bfd = sdata;
2593
2594 return _bfd_elf_new_section_hook (abfd, sec);
2595 }
2596
2597 static void *
2598 get_opd_info (asection * sec)
2599 {
2600 if (sec != NULL
2601 && ppc64_elf_section_data (sec) != NULL
2602 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2603 return ppc64_elf_section_data (sec)->opd.adjust;
2604 return NULL;
2605 }
2606 \f
2607 /* Parameters for the qsort hook. */
2608 static asection *synthetic_opd;
2609 static bfd_boolean synthetic_relocatable;
2610
2611 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2612
2613 static int
2614 compare_symbols (const void *ap, const void *bp)
2615 {
2616 const asymbol *a = * (const asymbol **) ap;
2617 const asymbol *b = * (const asymbol **) bp;
2618
2619 /* Section symbols first. */
2620 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2621 return -1;
2622 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2623 return 1;
2624
2625 /* then .opd symbols. */
2626 if (a->section == synthetic_opd && b->section != synthetic_opd)
2627 return -1;
2628 if (a->section != synthetic_opd && b->section == synthetic_opd)
2629 return 1;
2630
2631 /* then other code symbols. */
2632 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2633 == (SEC_CODE | SEC_ALLOC)
2634 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2635 != (SEC_CODE | SEC_ALLOC))
2636 return -1;
2637
2638 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2639 != (SEC_CODE | SEC_ALLOC)
2640 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2641 == (SEC_CODE | SEC_ALLOC))
2642 return 1;
2643
2644 if (synthetic_relocatable)
2645 {
2646 if (a->section->id < b->section->id)
2647 return -1;
2648
2649 if (a->section->id > b->section->id)
2650 return 1;
2651 }
2652
2653 if (a->value + a->section->vma < b->value + b->section->vma)
2654 return -1;
2655
2656 if (a->value + a->section->vma > b->value + b->section->vma)
2657 return 1;
2658
2659 return 0;
2660 }
2661
2662 /* Search SYMS for a symbol of the given VALUE. */
2663
2664 static asymbol *
2665 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2666 {
2667 long mid;
2668
2669 if (id == -1)
2670 {
2671 while (lo < hi)
2672 {
2673 mid = (lo + hi) >> 1;
2674 if (syms[mid]->value + syms[mid]->section->vma < value)
2675 lo = mid + 1;
2676 else if (syms[mid]->value + syms[mid]->section->vma > value)
2677 hi = mid;
2678 else
2679 return syms[mid];
2680 }
2681 }
2682 else
2683 {
2684 while (lo < hi)
2685 {
2686 mid = (lo + hi) >> 1;
2687 if (syms[mid]->section->id < id)
2688 lo = mid + 1;
2689 else if (syms[mid]->section->id > id)
2690 hi = mid;
2691 else if (syms[mid]->value < value)
2692 lo = mid + 1;
2693 else if (syms[mid]->value > value)
2694 hi = mid;
2695 else
2696 return syms[mid];
2697 }
2698 }
2699 return NULL;
2700 }
2701
2702 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2703 entry syms. */
2704
2705 static long
2706 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2707 long static_count, asymbol **static_syms,
2708 long dyn_count, asymbol **dyn_syms,
2709 asymbol **ret)
2710 {
2711 asymbol *s;
2712 long i;
2713 long count;
2714 char *names;
2715 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2716 asection *opd;
2717 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2718 asymbol **syms;
2719
2720 *ret = NULL;
2721
2722 opd = bfd_get_section_by_name (abfd, ".opd");
2723 if (opd == NULL)
2724 return 0;
2725
2726 symcount = static_count;
2727 if (!relocatable)
2728 symcount += dyn_count;
2729 if (symcount == 0)
2730 return 0;
2731
2732 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2733 if (syms == NULL)
2734 return -1;
2735
2736 if (!relocatable && static_count != 0 && dyn_count != 0)
2737 {
2738 /* Use both symbol tables. */
2739 memcpy (syms, static_syms, static_count * sizeof (*syms));
2740 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2741 }
2742 else if (!relocatable && static_count == 0)
2743 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2744 else
2745 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2746
2747 synthetic_opd = opd;
2748 synthetic_relocatable = relocatable;
2749 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2750
2751 if (!relocatable && symcount > 1)
2752 {
2753 long j;
2754 /* Trim duplicate syms, since we may have merged the normal and
2755 dynamic symbols. Actually, we only care about syms that have
2756 different values, so trim any with the same value. */
2757 for (i = 1, j = 1; i < symcount; ++i)
2758 if (syms[i - 1]->value + syms[i - 1]->section->vma
2759 != syms[i]->value + syms[i]->section->vma)
2760 syms[j++] = syms[i];
2761 symcount = j;
2762 }
2763
2764 i = 0;
2765 if (syms[i]->section == opd)
2766 ++i;
2767 codesecsym = i;
2768
2769 for (; i < symcount; ++i)
2770 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2771 != (SEC_CODE | SEC_ALLOC))
2772 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2773 break;
2774 codesecsymend = i;
2775
2776 for (; i < symcount; ++i)
2777 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2778 break;
2779 secsymend = i;
2780
2781 for (; i < symcount; ++i)
2782 if (syms[i]->section != opd)
2783 break;
2784 opdsymend = i;
2785
2786 for (; i < symcount; ++i)
2787 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2788 != (SEC_CODE | SEC_ALLOC))
2789 break;
2790 symcount = i;
2791
2792 count = 0;
2793 if (opdsymend == secsymend)
2794 goto done;
2795
2796 if (relocatable)
2797 {
2798 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2799 arelent *r;
2800 size_t size;
2801 long relcount;
2802
2803 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2804 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2805 if (relcount == 0)
2806 goto done;
2807
2808 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2809 {
2810 count = -1;
2811 goto done;
2812 }
2813
2814 size = 0;
2815 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2816 {
2817 asymbol *sym;
2818
2819 while (r < opd->relocation + relcount
2820 && r->address < syms[i]->value + opd->vma)
2821 ++r;
2822
2823 if (r == opd->relocation + relcount)
2824 break;
2825
2826 if (r->address != syms[i]->value + opd->vma)
2827 continue;
2828
2829 if (r->howto->type != R_PPC64_ADDR64)
2830 continue;
2831
2832 sym = *r->sym_ptr_ptr;
2833 if (!sym_exists_at (syms, opdsymend, symcount,
2834 sym->section->id, sym->value + r->addend))
2835 {
2836 ++count;
2837 size += sizeof (asymbol);
2838 size += strlen (syms[i]->name) + 2;
2839 }
2840 }
2841
2842 s = *ret = bfd_malloc (size);
2843 if (s == NULL)
2844 {
2845 count = -1;
2846 goto done;
2847 }
2848
2849 names = (char *) (s + count);
2850
2851 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2852 {
2853 asymbol *sym;
2854
2855 while (r < opd->relocation + relcount
2856 && r->address < syms[i]->value + opd->vma)
2857 ++r;
2858
2859 if (r == opd->relocation + relcount)
2860 break;
2861
2862 if (r->address != syms[i]->value + opd->vma)
2863 continue;
2864
2865 if (r->howto->type != R_PPC64_ADDR64)
2866 continue;
2867
2868 sym = *r->sym_ptr_ptr;
2869 if (!sym_exists_at (syms, opdsymend, symcount,
2870 sym->section->id, sym->value + r->addend))
2871 {
2872 size_t len;
2873
2874 *s = *syms[i];
2875 s->section = sym->section;
2876 s->value = sym->value + r->addend;
2877 s->name = names;
2878 *names++ = '.';
2879 len = strlen (syms[i]->name);
2880 memcpy (names, syms[i]->name, len + 1);
2881 names += len + 1;
2882 s++;
2883 }
2884 }
2885 }
2886 else
2887 {
2888 bfd_byte *contents;
2889 size_t size;
2890
2891 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2892 {
2893 if (contents)
2894 {
2895 free_contents_and_exit:
2896 free (contents);
2897 }
2898 count = -1;
2899 goto done;
2900 }
2901
2902 size = 0;
2903 for (i = secsymend; i < opdsymend; ++i)
2904 {
2905 bfd_vma ent;
2906
2907 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2908 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2909 {
2910 ++count;
2911 size += sizeof (asymbol);
2912 size += strlen (syms[i]->name) + 2;
2913 }
2914 }
2915
2916 s = *ret = bfd_malloc (size);
2917 if (s == NULL)
2918 goto free_contents_and_exit;
2919
2920 names = (char *) (s + count);
2921
2922 for (i = secsymend; i < opdsymend; ++i)
2923 {
2924 bfd_vma ent;
2925
2926 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2927 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2928 {
2929 long lo, hi;
2930 size_t len;
2931 asection *sec = abfd->sections;
2932
2933 *s = *syms[i];
2934 lo = codesecsym;
2935 hi = codesecsymend;
2936 while (lo < hi)
2937 {
2938 long mid = (lo + hi) >> 1;
2939 if (syms[mid]->section->vma < ent)
2940 lo = mid + 1;
2941 else if (syms[mid]->section->vma > ent)
2942 hi = mid;
2943 else
2944 {
2945 sec = syms[mid]->section;
2946 break;
2947 }
2948 }
2949
2950 if (lo >= hi && lo > codesecsym)
2951 sec = syms[lo - 1]->section;
2952
2953 for (; sec != NULL; sec = sec->next)
2954 {
2955 if (sec->vma > ent)
2956 break;
2957 if ((sec->flags & SEC_ALLOC) == 0
2958 || (sec->flags & SEC_LOAD) == 0)
2959 break;
2960 if ((sec->flags & SEC_CODE) != 0)
2961 s->section = sec;
2962 }
2963 s->value = ent - s->section->vma;
2964 s->name = names;
2965 *names++ = '.';
2966 len = strlen (syms[i]->name);
2967 memcpy (names, syms[i]->name, len + 1);
2968 names += len + 1;
2969 s++;
2970 }
2971 }
2972 free (contents);
2973 }
2974
2975 done:
2976 free (syms);
2977 return count;
2978 }
2979 \f
2980 /* The following functions are specific to the ELF linker, while
2981 functions above are used generally. Those named ppc64_elf_* are
2982 called by the main ELF linker code. They appear in this file more
2983 or less in the order in which they are called. eg.
2984 ppc64_elf_check_relocs is called early in the link process,
2985 ppc64_elf_finish_dynamic_sections is one of the last functions
2986 called.
2987
2988 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2989 functions have both a function code symbol and a function descriptor
2990 symbol. A call to foo in a relocatable object file looks like:
2991
2992 . .text
2993 . x:
2994 . bl .foo
2995 . nop
2996
2997 The function definition in another object file might be:
2998
2999 . .section .opd
3000 . foo: .quad .foo
3001 . .quad .TOC.@tocbase
3002 . .quad 0
3003 .
3004 . .text
3005 . .foo: blr
3006
3007 When the linker resolves the call during a static link, the branch
3008 unsurprisingly just goes to .foo and the .opd information is unused.
3009 If the function definition is in a shared library, things are a little
3010 different: The call goes via a plt call stub, the opd information gets
3011 copied to the plt, and the linker patches the nop.
3012
3013 . x:
3014 . bl .foo_stub
3015 . ld 2,40(1)
3016 .
3017 .
3018 . .foo_stub:
3019 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3020 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3021 . std 2,40(1) # this is the general idea
3022 . ld 11,0(12)
3023 . ld 2,8(12)
3024 . mtctr 11
3025 . ld 11,16(12)
3026 . bctr
3027 .
3028 . .section .plt
3029 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3030
3031 The "reloc ()" notation is supposed to indicate that the linker emits
3032 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3033 copying.
3034
3035 What are the difficulties here? Well, firstly, the relocations
3036 examined by the linker in check_relocs are against the function code
3037 sym .foo, while the dynamic relocation in the plt is emitted against
3038 the function descriptor symbol, foo. Somewhere along the line, we need
3039 to carefully copy dynamic link information from one symbol to the other.
3040 Secondly, the generic part of the elf linker will make .foo a dynamic
3041 symbol as is normal for most other backends. We need foo dynamic
3042 instead, at least for an application final link. However, when
3043 creating a shared library containing foo, we need to have both symbols
3044 dynamic so that references to .foo are satisfied during the early
3045 stages of linking. Otherwise the linker might decide to pull in a
3046 definition from some other object, eg. a static library.
3047
3048 Update: As of August 2004, we support a new convention. Function
3049 calls may use the function descriptor symbol, ie. "bl foo". This
3050 behaves exactly as "bl .foo". */
3051
3052 /* The linker needs to keep track of the number of relocs that it
3053 decides to copy as dynamic relocs in check_relocs for each symbol.
3054 This is so that it can later discard them if they are found to be
3055 unnecessary. We store the information in a field extending the
3056 regular ELF linker hash table. */
3057
3058 struct ppc_dyn_relocs
3059 {
3060 struct ppc_dyn_relocs *next;
3061
3062 /* The input section of the reloc. */
3063 asection *sec;
3064
3065 /* Total number of relocs copied for the input section. */
3066 bfd_size_type count;
3067
3068 /* Number of pc-relative relocs copied for the input section. */
3069 bfd_size_type pc_count;
3070 };
3071
3072 /* Track GOT entries needed for a given symbol. We might need more
3073 than one got entry per symbol. */
3074 struct got_entry
3075 {
3076 struct got_entry *next;
3077
3078 /* The symbol addend that we'll be placing in the GOT. */
3079 bfd_vma addend;
3080
3081 /* Unlike other ELF targets, we use separate GOT entries for the same
3082 symbol referenced from different input files. This is to support
3083 automatic multiple TOC/GOT sections, where the TOC base can vary
3084 from one input file to another.
3085
3086 Point to the BFD owning this GOT entry. */
3087 bfd *owner;
3088
3089 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3090 TLS_TPREL or TLS_DTPREL for tls entries. */
3091 char tls_type;
3092
3093 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3094 union
3095 {
3096 bfd_signed_vma refcount;
3097 bfd_vma offset;
3098 } got;
3099 };
3100
3101 /* The same for PLT. */
3102 struct plt_entry
3103 {
3104 struct plt_entry *next;
3105
3106 bfd_vma addend;
3107
3108 union
3109 {
3110 bfd_signed_vma refcount;
3111 bfd_vma offset;
3112 } plt;
3113 };
3114
3115 /* Of those relocs that might be copied as dynamic relocs, this macro
3116 selects those that must be copied when linking a shared library,
3117 even when the symbol is local. */
3118
3119 #define MUST_BE_DYN_RELOC(RTYPE) \
3120 ((RTYPE) != R_PPC64_REL32 \
3121 && (RTYPE) != R_PPC64_REL64 \
3122 && (RTYPE) != R_PPC64_REL30)
3123
3124 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3125 copying dynamic variables from a shared lib into an app's dynbss
3126 section, and instead use a dynamic relocation to point into the
3127 shared lib. With code that gcc generates, it's vital that this be
3128 enabled; In the PowerPC64 ABI, the address of a function is actually
3129 the address of a function descriptor, which resides in the .opd
3130 section. gcc uses the descriptor directly rather than going via the
3131 GOT as some other ABI's do, which means that initialized function
3132 pointers must reference the descriptor. Thus, a function pointer
3133 initialized to the address of a function in a shared library will
3134 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3135 redefines the function descriptor symbol to point to the copy. This
3136 presents a problem as a plt entry for that function is also
3137 initialized from the function descriptor symbol and the copy reloc
3138 may not be initialized first. */
3139 #define ELIMINATE_COPY_RELOCS 1
3140
3141 /* Section name for stubs is the associated section name plus this
3142 string. */
3143 #define STUB_SUFFIX ".stub"
3144
3145 /* Linker stubs.
3146 ppc_stub_long_branch:
3147 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3148 destination, but a 24 bit branch in a stub section will reach.
3149 . b dest
3150
3151 ppc_stub_plt_branch:
3152 Similar to the above, but a 24 bit branch in the stub section won't
3153 reach its destination.
3154 . addis %r12,%r2,xxx@toc@ha
3155 . ld %r11,xxx@toc@l(%r12)
3156 . mtctr %r11
3157 . bctr
3158
3159 ppc_stub_plt_call:
3160 Used to call a function in a shared library. If it so happens that
3161 the plt entry referenced crosses a 64k boundary, then an extra
3162 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3163 xxx+16 as appropriate.
3164 . addis %r12,%r2,xxx@toc@ha
3165 . std %r2,40(%r1)
3166 . ld %r11,xxx+0@toc@l(%r12)
3167 . ld %r2,xxx+8@toc@l(%r12)
3168 . mtctr %r11
3169 . ld %r11,xxx+16@toc@l(%r12)
3170 . bctr
3171
3172 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3173 code to adjust the value and save r2 to support multiple toc sections.
3174 A ppc_stub_long_branch with an r2 offset looks like:
3175 . std %r2,40(%r1)
3176 . addis %r2,%r2,off@ha
3177 . addi %r2,%r2,off@l
3178 . b dest
3179
3180 A ppc_stub_plt_branch with an r2 offset looks like:
3181 . std %r2,40(%r1)
3182 . addis %r12,%r2,xxx@toc@ha
3183 . ld %r11,xxx@toc@l(%r12)
3184 . addis %r2,%r2,off@ha
3185 . addi %r2,%r2,off@l
3186 . mtctr %r11
3187 . bctr
3188 */
3189
3190 enum ppc_stub_type {
3191 ppc_stub_none,
3192 ppc_stub_long_branch,
3193 ppc_stub_long_branch_r2off,
3194 ppc_stub_plt_branch,
3195 ppc_stub_plt_branch_r2off,
3196 ppc_stub_plt_call
3197 };
3198
3199 struct ppc_stub_hash_entry {
3200
3201 /* Base hash table entry structure. */
3202 struct bfd_hash_entry root;
3203
3204 enum ppc_stub_type stub_type;
3205
3206 /* The stub section. */
3207 asection *stub_sec;
3208
3209 /* Offset within stub_sec of the beginning of this stub. */
3210 bfd_vma stub_offset;
3211
3212 /* Given the symbol's value and its section we can determine its final
3213 value when building the stubs (so the stub knows where to jump. */
3214 bfd_vma target_value;
3215 asection *target_section;
3216
3217 /* The symbol table entry, if any, that this was derived from. */
3218 struct ppc_link_hash_entry *h;
3219
3220 /* And the reloc addend that this was derived from. */
3221 bfd_vma addend;
3222
3223 /* Where this stub is being called from, or, in the case of combined
3224 stub sections, the first input section in the group. */
3225 asection *id_sec;
3226 };
3227
3228 struct ppc_branch_hash_entry {
3229
3230 /* Base hash table entry structure. */
3231 struct bfd_hash_entry root;
3232
3233 /* Offset within .branch_lt. */
3234 unsigned int offset;
3235
3236 /* Generation marker. */
3237 unsigned int iter;
3238 };
3239
3240 struct ppc_link_hash_entry
3241 {
3242 struct elf_link_hash_entry elf;
3243
3244 /* A pointer to the most recently used stub hash entry against this
3245 symbol. */
3246 struct ppc_stub_hash_entry *stub_cache;
3247
3248 /* Track dynamic relocs copied for this symbol. */
3249 struct ppc_dyn_relocs *dyn_relocs;
3250
3251 /* Link between function code and descriptor symbols. */
3252 struct ppc_link_hash_entry *oh;
3253
3254 /* Flag function code and descriptor symbols. */
3255 unsigned int is_func:1;
3256 unsigned int is_func_descriptor:1;
3257 unsigned int fake:1;
3258
3259 /* Whether global opd/toc sym has been adjusted or not.
3260 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3261 should be set for all globals defined in any opd/toc section. */
3262 unsigned int adjust_done:1;
3263
3264 /* Set if we twiddled this symbol to weak at some stage. */
3265 unsigned int was_undefined:1;
3266
3267 /* Contexts in which symbol is used in the GOT (or TOC).
3268 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3269 corresponding relocs are encountered during check_relocs.
3270 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3271 indicate the corresponding GOT entry type is not needed.
3272 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3273 a TPREL one. We use a separate flag rather than setting TPREL
3274 just for convenience in distinguishing the two cases. */
3275 #define TLS_GD 1 /* GD reloc. */
3276 #define TLS_LD 2 /* LD reloc. */
3277 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3278 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3279 #define TLS_TLS 16 /* Any TLS reloc. */
3280 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3281 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3282 char tls_mask;
3283 };
3284
3285 /* ppc64 ELF linker hash table. */
3286
3287 struct ppc_link_hash_table
3288 {
3289 struct elf_link_hash_table elf;
3290
3291 /* The stub hash table. */
3292 struct bfd_hash_table stub_hash_table;
3293
3294 /* Another hash table for plt_branch stubs. */
3295 struct bfd_hash_table branch_hash_table;
3296
3297 /* Linker stub bfd. */
3298 bfd *stub_bfd;
3299
3300 /* Linker call-backs. */
3301 asection * (*add_stub_section) (const char *, asection *);
3302 void (*layout_sections_again) (void);
3303
3304 /* Array to keep track of which stub sections have been created, and
3305 information on stub grouping. */
3306 struct map_stub {
3307 /* This is the section to which stubs in the group will be attached. */
3308 asection *link_sec;
3309 /* The stub section. */
3310 asection *stub_sec;
3311 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3312 bfd_vma toc_off;
3313 } *stub_group;
3314
3315 /* Temp used when calculating TOC pointers. */
3316 bfd_vma toc_curr;
3317
3318 /* Highest input section id. */
3319 int top_id;
3320
3321 /* Highest output section index. */
3322 int top_index;
3323
3324 /* List of input sections for each output section. */
3325 asection **input_list;
3326
3327 /* Short-cuts to get to dynamic linker sections. */
3328 asection *got;
3329 asection *plt;
3330 asection *relplt;
3331 asection *dynbss;
3332 asection *relbss;
3333 asection *glink;
3334 asection *sfpr;
3335 asection *brlt;
3336 asection *relbrlt;
3337
3338 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3339 struct ppc_link_hash_entry *tls_get_addr;
3340 struct ppc_link_hash_entry *tls_get_addr_fd;
3341
3342 /* Statistics. */
3343 unsigned long stub_count[ppc_stub_plt_call];
3344
3345 /* Number of stubs against global syms. */
3346 unsigned long stub_globals;
3347
3348 /* Set if we should emit symbols for stubs. */
3349 unsigned int emit_stub_syms:1;
3350
3351 /* Support for multiple toc sections. */
3352 unsigned int no_multi_toc:1;
3353 unsigned int multi_toc_needed:1;
3354
3355 /* Set on error. */
3356 unsigned int stub_error:1;
3357
3358 /* Flag set when small branches are detected. Used to
3359 select suitable defaults for the stub group size. */
3360 unsigned int has_14bit_branch:1;
3361
3362 /* Temp used by ppc64_elf_check_directives. */
3363 unsigned int twiddled_syms:1;
3364
3365 /* Incremented every time we size stubs. */
3366 unsigned int stub_iteration;
3367
3368 /* Small local sym to section mapping cache. */
3369 struct sym_sec_cache sym_sec;
3370 };
3371
3372 /* Rename some of the generic section flags to better document how they
3373 are used here. */
3374 #define has_toc_reloc has_gp_reloc
3375 #define makes_toc_func_call need_finalize_relax
3376 #define call_check_in_progress reloc_done
3377
3378 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3379
3380 #define ppc_hash_table(p) \
3381 ((struct ppc_link_hash_table *) ((p)->hash))
3382
3383 #define ppc_stub_hash_lookup(table, string, create, copy) \
3384 ((struct ppc_stub_hash_entry *) \
3385 bfd_hash_lookup ((table), (string), (create), (copy)))
3386
3387 #define ppc_branch_hash_lookup(table, string, create, copy) \
3388 ((struct ppc_branch_hash_entry *) \
3389 bfd_hash_lookup ((table), (string), (create), (copy)))
3390
3391 /* Create an entry in the stub hash table. */
3392
3393 static struct bfd_hash_entry *
3394 stub_hash_newfunc (struct bfd_hash_entry *entry,
3395 struct bfd_hash_table *table,
3396 const char *string)
3397 {
3398 /* Allocate the structure if it has not already been allocated by a
3399 subclass. */
3400 if (entry == NULL)
3401 {
3402 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3403 if (entry == NULL)
3404 return entry;
3405 }
3406
3407 /* Call the allocation method of the superclass. */
3408 entry = bfd_hash_newfunc (entry, table, string);
3409 if (entry != NULL)
3410 {
3411 struct ppc_stub_hash_entry *eh;
3412
3413 /* Initialize the local fields. */
3414 eh = (struct ppc_stub_hash_entry *) entry;
3415 eh->stub_type = ppc_stub_none;
3416 eh->stub_sec = NULL;
3417 eh->stub_offset = 0;
3418 eh->target_value = 0;
3419 eh->target_section = NULL;
3420 eh->h = NULL;
3421 eh->id_sec = NULL;
3422 }
3423
3424 return entry;
3425 }
3426
3427 /* Create an entry in the branch hash table. */
3428
3429 static struct bfd_hash_entry *
3430 branch_hash_newfunc (struct bfd_hash_entry *entry,
3431 struct bfd_hash_table *table,
3432 const char *string)
3433 {
3434 /* Allocate the structure if it has not already been allocated by a
3435 subclass. */
3436 if (entry == NULL)
3437 {
3438 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3439 if (entry == NULL)
3440 return entry;
3441 }
3442
3443 /* Call the allocation method of the superclass. */
3444 entry = bfd_hash_newfunc (entry, table, string);
3445 if (entry != NULL)
3446 {
3447 struct ppc_branch_hash_entry *eh;
3448
3449 /* Initialize the local fields. */
3450 eh = (struct ppc_branch_hash_entry *) entry;
3451 eh->offset = 0;
3452 eh->iter = 0;
3453 }
3454
3455 return entry;
3456 }
3457
3458 /* Create an entry in a ppc64 ELF linker hash table. */
3459
3460 static struct bfd_hash_entry *
3461 link_hash_newfunc (struct bfd_hash_entry *entry,
3462 struct bfd_hash_table *table,
3463 const char *string)
3464 {
3465 /* Allocate the structure if it has not already been allocated by a
3466 subclass. */
3467 if (entry == NULL)
3468 {
3469 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3470 if (entry == NULL)
3471 return entry;
3472 }
3473
3474 /* Call the allocation method of the superclass. */
3475 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3476 if (entry != NULL)
3477 {
3478 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3479
3480 memset (&eh->stub_cache, 0,
3481 (sizeof (struct ppc_link_hash_entry)
3482 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3483 }
3484
3485 return entry;
3486 }
3487
3488 /* Create a ppc64 ELF linker hash table. */
3489
3490 static struct bfd_link_hash_table *
3491 ppc64_elf_link_hash_table_create (bfd *abfd)
3492 {
3493 struct ppc_link_hash_table *htab;
3494 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3495
3496 htab = bfd_zmalloc (amt);
3497 if (htab == NULL)
3498 return NULL;
3499
3500 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3501 {
3502 free (htab);
3503 return NULL;
3504 }
3505
3506 /* Init the stub hash table too. */
3507 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3508 return NULL;
3509
3510 /* And the branch hash table. */
3511 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3512 return NULL;
3513
3514 /* Initializing two fields of the union is just cosmetic. We really
3515 only care about glist, but when compiled on a 32-bit host the
3516 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3517 debugger inspection of these fields look nicer. */
3518 htab->elf.init_refcount.refcount = 0;
3519 htab->elf.init_refcount.glist = NULL;
3520 htab->elf.init_offset.offset = 0;
3521 htab->elf.init_offset.glist = NULL;
3522
3523 return &htab->elf.root;
3524 }
3525
3526 /* Free the derived linker hash table. */
3527
3528 static void
3529 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3530 {
3531 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3532
3533 bfd_hash_table_free (&ret->stub_hash_table);
3534 bfd_hash_table_free (&ret->branch_hash_table);
3535 _bfd_generic_link_hash_table_free (hash);
3536 }
3537
3538 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3539
3540 void
3541 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3542 {
3543 struct ppc_link_hash_table *htab;
3544
3545 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3546
3547 /* Always hook our dynamic sections into the first bfd, which is the
3548 linker created stub bfd. This ensures that the GOT header is at
3549 the start of the output TOC section. */
3550 htab = ppc_hash_table (info);
3551 htab->stub_bfd = abfd;
3552 htab->elf.dynobj = abfd;
3553 }
3554
3555 /* Build a name for an entry in the stub hash table. */
3556
3557 static char *
3558 ppc_stub_name (const asection *input_section,
3559 const asection *sym_sec,
3560 const struct ppc_link_hash_entry *h,
3561 const Elf_Internal_Rela *rel)
3562 {
3563 char *stub_name;
3564 bfd_size_type len;
3565
3566 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3567 offsets from a sym as a branch target? In fact, we could
3568 probably assume the addend is always zero. */
3569 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3570
3571 if (h)
3572 {
3573 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3574 stub_name = bfd_malloc (len);
3575 if (stub_name != NULL)
3576 {
3577 sprintf (stub_name, "%08x.%s+%x",
3578 input_section->id & 0xffffffff,
3579 h->elf.root.root.string,
3580 (int) rel->r_addend & 0xffffffff);
3581 }
3582 }
3583 else
3584 {
3585 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3586 stub_name = bfd_malloc (len);
3587 if (stub_name != NULL)
3588 {
3589 sprintf (stub_name, "%08x.%x:%x+%x",
3590 input_section->id & 0xffffffff,
3591 sym_sec->id & 0xffffffff,
3592 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3593 (int) rel->r_addend & 0xffffffff);
3594 }
3595 }
3596 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3597 stub_name[len - 2] = 0;
3598 return stub_name;
3599 }
3600
3601 /* Look up an entry in the stub hash. Stub entries are cached because
3602 creating the stub name takes a bit of time. */
3603
3604 static struct ppc_stub_hash_entry *
3605 ppc_get_stub_entry (const asection *input_section,
3606 const asection *sym_sec,
3607 struct ppc_link_hash_entry *h,
3608 const Elf_Internal_Rela *rel,
3609 struct ppc_link_hash_table *htab)
3610 {
3611 struct ppc_stub_hash_entry *stub_entry;
3612 const asection *id_sec;
3613
3614 /* If this input section is part of a group of sections sharing one
3615 stub section, then use the id of the first section in the group.
3616 Stub names need to include a section id, as there may well be
3617 more than one stub used to reach say, printf, and we need to
3618 distinguish between them. */
3619 id_sec = htab->stub_group[input_section->id].link_sec;
3620
3621 if (h != NULL && h->stub_cache != NULL
3622 && h->stub_cache->h == h
3623 && h->stub_cache->id_sec == id_sec)
3624 {
3625 stub_entry = h->stub_cache;
3626 }
3627 else
3628 {
3629 char *stub_name;
3630
3631 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3632 if (stub_name == NULL)
3633 return NULL;
3634
3635 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3636 stub_name, FALSE, FALSE);
3637 if (h != NULL)
3638 h->stub_cache = stub_entry;
3639
3640 free (stub_name);
3641 }
3642
3643 return stub_entry;
3644 }
3645
3646 /* Add a new stub entry to the stub hash. Not all fields of the new
3647 stub entry are initialised. */
3648
3649 static struct ppc_stub_hash_entry *
3650 ppc_add_stub (const char *stub_name,
3651 asection *section,
3652 struct ppc_link_hash_table *htab)
3653 {
3654 asection *link_sec;
3655 asection *stub_sec;
3656 struct ppc_stub_hash_entry *stub_entry;
3657
3658 link_sec = htab->stub_group[section->id].link_sec;
3659 stub_sec = htab->stub_group[section->id].stub_sec;
3660 if (stub_sec == NULL)
3661 {
3662 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3663 if (stub_sec == NULL)
3664 {
3665 size_t namelen;
3666 bfd_size_type len;
3667 char *s_name;
3668
3669 namelen = strlen (link_sec->name);
3670 len = namelen + sizeof (STUB_SUFFIX);
3671 s_name = bfd_alloc (htab->stub_bfd, len);
3672 if (s_name == NULL)
3673 return NULL;
3674
3675 memcpy (s_name, link_sec->name, namelen);
3676 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3677 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3678 if (stub_sec == NULL)
3679 return NULL;
3680 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3681 }
3682 htab->stub_group[section->id].stub_sec = stub_sec;
3683 }
3684
3685 /* Enter this entry into the linker stub hash table. */
3686 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3687 TRUE, FALSE);
3688 if (stub_entry == NULL)
3689 {
3690 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3691 section->owner, stub_name);
3692 return NULL;
3693 }
3694
3695 stub_entry->stub_sec = stub_sec;
3696 stub_entry->stub_offset = 0;
3697 stub_entry->id_sec = link_sec;
3698 return stub_entry;
3699 }
3700
3701 /* Create sections for linker generated code. */
3702
3703 static bfd_boolean
3704 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3705 {
3706 struct ppc_link_hash_table *htab;
3707 flagword flags;
3708
3709 htab = ppc_hash_table (info);
3710
3711 /* Create .sfpr for code to save and restore fp regs. */
3712 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3713 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3714 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3715 flags);
3716 if (htab->sfpr == NULL
3717 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3718 return FALSE;
3719
3720 /* Create .glink for lazy dynamic linking support. */
3721 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3722 flags);
3723 if (htab->glink == NULL
3724 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3725 return FALSE;
3726
3727 /* Create .branch_lt for plt_branch stubs. */
3728 flags = (SEC_ALLOC | SEC_LOAD
3729 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3730 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3731 flags);
3732 if (htab->brlt == NULL
3733 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3734 return FALSE;
3735
3736 if (info->shared || info->emitrelocations)
3737 {
3738 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3739 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3740 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3741 ".rela.branch_lt",
3742 flags);
3743 if (!htab->relbrlt
3744 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3745 return FALSE;
3746 }
3747 return TRUE;
3748 }
3749
3750 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3751 not already done. */
3752
3753 static bfd_boolean
3754 create_got_section (bfd *abfd, struct bfd_link_info *info)
3755 {
3756 asection *got, *relgot;
3757 flagword flags;
3758 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3759
3760 if (!htab->got)
3761 {
3762 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3763 return FALSE;
3764
3765 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3766 if (!htab->got)
3767 abort ();
3768 }
3769
3770 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3771 | SEC_LINKER_CREATED);
3772
3773 got = bfd_make_section_with_flags (abfd, ".got", flags);
3774 if (!got
3775 || !bfd_set_section_alignment (abfd, got, 3))
3776 return FALSE;
3777
3778 relgot = bfd_make_section_with_flags (abfd, ".rela.got",
3779 flags | SEC_READONLY);
3780 if (!relgot
3781 || ! bfd_set_section_alignment (abfd, relgot, 3))
3782 return FALSE;
3783
3784 ppc64_elf_tdata (abfd)->got = got;
3785 ppc64_elf_tdata (abfd)->relgot = relgot;
3786 return TRUE;
3787 }
3788
3789 /* Create the dynamic sections, and set up shortcuts. */
3790
3791 static bfd_boolean
3792 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3793 {
3794 struct ppc_link_hash_table *htab;
3795
3796 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3797 return FALSE;
3798
3799 htab = ppc_hash_table (info);
3800 if (!htab->got)
3801 htab->got = bfd_get_section_by_name (dynobj, ".got");
3802 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3803 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3804 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3805 if (!info->shared)
3806 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3807
3808 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3809 || (!info->shared && !htab->relbss))
3810 abort ();
3811
3812 return TRUE;
3813 }
3814
3815 /* Merge PLT info on FROM with that on TO. */
3816
3817 static void
3818 move_plt_plist (struct ppc_link_hash_entry *from,
3819 struct ppc_link_hash_entry *to)
3820 {
3821 if (from->elf.plt.plist != NULL)
3822 {
3823 if (to->elf.plt.plist != NULL)
3824 {
3825 struct plt_entry **entp;
3826 struct plt_entry *ent;
3827
3828 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3829 {
3830 struct plt_entry *dent;
3831
3832 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3833 if (dent->addend == ent->addend)
3834 {
3835 dent->plt.refcount += ent->plt.refcount;
3836 *entp = ent->next;
3837 break;
3838 }
3839 if (dent == NULL)
3840 entp = &ent->next;
3841 }
3842 *entp = to->elf.plt.plist;
3843 }
3844
3845 to->elf.plt.plist = from->elf.plt.plist;
3846 from->elf.plt.plist = NULL;
3847 }
3848 }
3849
3850 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3851
3852 static void
3853 ppc64_elf_copy_indirect_symbol
3854 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3855 struct elf_link_hash_entry *dir,
3856 struct elf_link_hash_entry *ind)
3857 {
3858 struct ppc_link_hash_entry *edir, *eind;
3859
3860 edir = (struct ppc_link_hash_entry *) dir;
3861 eind = (struct ppc_link_hash_entry *) ind;
3862
3863 /* Copy over any dynamic relocs we may have on the indirect sym. */
3864 if (eind->dyn_relocs != NULL)
3865 {
3866 if (edir->dyn_relocs != NULL)
3867 {
3868 struct ppc_dyn_relocs **pp;
3869 struct ppc_dyn_relocs *p;
3870
3871 if (eind->elf.root.type == bfd_link_hash_indirect)
3872 abort ();
3873
3874 /* Add reloc counts against the weak sym to the strong sym
3875 list. Merge any entries against the same section. */
3876 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3877 {
3878 struct ppc_dyn_relocs *q;
3879
3880 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3881 if (q->sec == p->sec)
3882 {
3883 q->pc_count += p->pc_count;
3884 q->count += p->count;
3885 *pp = p->next;
3886 break;
3887 }
3888 if (q == NULL)
3889 pp = &p->next;
3890 }
3891 *pp = edir->dyn_relocs;
3892 }
3893
3894 edir->dyn_relocs = eind->dyn_relocs;
3895 eind->dyn_relocs = NULL;
3896 }
3897
3898 edir->is_func |= eind->is_func;
3899 edir->is_func_descriptor |= eind->is_func_descriptor;
3900 edir->tls_mask |= eind->tls_mask;
3901
3902 /* If called to transfer flags for a weakdef during processing
3903 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3904 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3905 if (!(ELIMINATE_COPY_RELOCS
3906 && eind->elf.root.type != bfd_link_hash_indirect
3907 && edir->elf.dynamic_adjusted))
3908 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3909
3910 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3911 edir->elf.ref_regular |= eind->elf.ref_regular;
3912 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3913 edir->elf.needs_plt |= eind->elf.needs_plt;
3914
3915 /* If we were called to copy over info for a weak sym, that's all. */
3916 if (eind->elf.root.type != bfd_link_hash_indirect)
3917 return;
3918
3919 /* Copy over got entries that we may have already seen to the
3920 symbol which just became indirect. */
3921 if (eind->elf.got.glist != NULL)
3922 {
3923 if (edir->elf.got.glist != NULL)
3924 {
3925 struct got_entry **entp;
3926 struct got_entry *ent;
3927
3928 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3929 {
3930 struct got_entry *dent;
3931
3932 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3933 if (dent->addend == ent->addend
3934 && dent->owner == ent->owner
3935 && dent->tls_type == ent->tls_type)
3936 {
3937 dent->got.refcount += ent->got.refcount;
3938 *entp = ent->next;
3939 break;
3940 }
3941 if (dent == NULL)
3942 entp = &ent->next;
3943 }
3944 *entp = edir->elf.got.glist;
3945 }
3946
3947 edir->elf.got.glist = eind->elf.got.glist;
3948 eind->elf.got.glist = NULL;
3949 }
3950
3951 /* And plt entries. */
3952 move_plt_plist (eind, edir);
3953
3954 if (edir->elf.dynindx == -1)
3955 {
3956 edir->elf.dynindx = eind->elf.dynindx;
3957 edir->elf.dynstr_index = eind->elf.dynstr_index;
3958 eind->elf.dynindx = -1;
3959 eind->elf.dynstr_index = 0;
3960 }
3961 else
3962 BFD_ASSERT (eind->elf.dynindx == -1);
3963 }
3964
3965 /* Find the function descriptor hash entry from the given function code
3966 hash entry FH. Link the entries via their OH fields. */
3967
3968 static struct ppc_link_hash_entry *
3969 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3970 {
3971 struct ppc_link_hash_entry *fdh = fh->oh;
3972
3973 if (fdh == NULL)
3974 {
3975 const char *fd_name = fh->elf.root.root.string + 1;
3976
3977 fdh = (struct ppc_link_hash_entry *)
3978 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3979 if (fdh != NULL)
3980 {
3981 fdh->is_func_descriptor = 1;
3982 fdh->oh = fh;
3983 fh->is_func = 1;
3984 fh->oh = fdh;
3985 }
3986 }
3987
3988 return fdh;
3989 }
3990
3991 /* Make a fake function descriptor sym for the code sym FH. */
3992
3993 static struct ppc_link_hash_entry *
3994 make_fdh (struct bfd_link_info *info,
3995 struct ppc_link_hash_entry *fh)
3996 {
3997 bfd *abfd;
3998 asymbol *newsym;
3999 struct bfd_link_hash_entry *bh;
4000 struct ppc_link_hash_entry *fdh;
4001
4002 abfd = fh->elf.root.u.undef.abfd;
4003 newsym = bfd_make_empty_symbol (abfd);
4004 newsym->name = fh->elf.root.root.string + 1;
4005 newsym->section = bfd_und_section_ptr;
4006 newsym->value = 0;
4007 newsym->flags = BSF_WEAK;
4008
4009 bh = NULL;
4010 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4011 newsym->flags, newsym->section,
4012 newsym->value, NULL, FALSE, FALSE,
4013 &bh))
4014 return NULL;
4015
4016 fdh = (struct ppc_link_hash_entry *) bh;
4017 fdh->elf.non_elf = 0;
4018 fdh->fake = 1;
4019 fdh->is_func_descriptor = 1;
4020 fdh->oh = fh;
4021 fh->is_func = 1;
4022 fh->oh = fdh;
4023 return fdh;
4024 }
4025
4026 /* Hacks to support old ABI code.
4027 When making function calls, old ABI code references function entry
4028 points (dot symbols), while new ABI code references the function
4029 descriptor symbol. We need to make any combination of reference and
4030 definition work together, without breaking archive linking.
4031
4032 For a defined function "foo" and an undefined call to "bar":
4033 An old object defines "foo" and ".foo", references ".bar" (possibly
4034 "bar" too).
4035 A new object defines "foo" and references "bar".
4036
4037 A new object thus has no problem with its undefined symbols being
4038 satisfied by definitions in an old object. On the other hand, the
4039 old object won't have ".bar" satisfied by a new object. */
4040
4041 /* Fix function descriptor symbols defined in .opd sections to be
4042 function type. */
4043
4044 static bfd_boolean
4045 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4046 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4047 Elf_Internal_Sym *isym,
4048 const char **name ATTRIBUTE_UNUSED,
4049 flagword *flags ATTRIBUTE_UNUSED,
4050 asection **sec,
4051 bfd_vma *value ATTRIBUTE_UNUSED)
4052 {
4053 if (*sec != NULL
4054 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4055 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4056 return TRUE;
4057 }
4058
4059 /* This function makes an old ABI object reference to ".bar" cause the
4060 inclusion of a new ABI object archive that defines "bar".
4061 NAME is a symbol defined in an archive. Return a symbol in the hash
4062 table that might be satisfied by the archive symbols. */
4063
4064 static struct elf_link_hash_entry *
4065 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4066 struct bfd_link_info *info,
4067 const char *name)
4068 {
4069 struct elf_link_hash_entry *h;
4070 char *dot_name;
4071 size_t len;
4072
4073 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4074 if (h != NULL
4075 /* Don't return this sym if it is a fake function descriptor
4076 created by add_symbol_adjust. */
4077 && !(h->root.type == bfd_link_hash_undefweak
4078 && ((struct ppc_link_hash_entry *) h)->fake))
4079 return h;
4080
4081 if (name[0] == '.')
4082 return h;
4083
4084 len = strlen (name);
4085 dot_name = bfd_alloc (abfd, len + 2);
4086 if (dot_name == NULL)
4087 return (struct elf_link_hash_entry *) 0 - 1;
4088 dot_name[0] = '.';
4089 memcpy (dot_name + 1, name, len + 1);
4090 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4091 bfd_release (abfd, dot_name);
4092 return h;
4093 }
4094
4095 /* This function satisfies all old ABI object references to ".bar" if a
4096 new ABI object defines "bar". Well, at least, undefined dot symbols
4097 are made weak. This stops later archive searches from including an
4098 object if we already have a function descriptor definition. It also
4099 prevents the linker complaining about undefined symbols.
4100 We also check and correct mismatched symbol visibility here. The
4101 most restrictive visibility of the function descriptor and the
4102 function entry symbol is used. */
4103
4104 struct add_symbol_adjust_data
4105 {
4106 struct bfd_link_info *info;
4107 bfd_boolean ok;
4108 };
4109
4110 static bfd_boolean
4111 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4112 {
4113 struct add_symbol_adjust_data *data;
4114 struct ppc_link_hash_table *htab;
4115 struct ppc_link_hash_entry *eh;
4116 struct ppc_link_hash_entry *fdh;
4117
4118 if (h->root.type == bfd_link_hash_indirect)
4119 return TRUE;
4120
4121 if (h->root.type == bfd_link_hash_warning)
4122 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4123
4124 if (h->root.root.string[0] != '.')
4125 return TRUE;
4126
4127 data = inf;
4128 htab = ppc_hash_table (data->info);
4129 eh = (struct ppc_link_hash_entry *) h;
4130 fdh = get_fdh (eh, htab);
4131 if (fdh == NULL
4132 && !data->info->relocatable
4133 && (eh->elf.root.type == bfd_link_hash_undefined
4134 || eh->elf.root.type == bfd_link_hash_undefweak)
4135 && eh->elf.ref_regular)
4136 {
4137 /* Make an undefweak function descriptor sym, which is enough to
4138 pull in an --as-needed shared lib, but won't cause link
4139 errors. Archives are handled elsewhere. */
4140 fdh = make_fdh (data->info, eh);
4141 if (fdh == NULL)
4142 data->ok = FALSE;
4143 else
4144 fdh->elf.ref_regular = 1;
4145 }
4146 else if (fdh != NULL
4147 && (fdh->elf.root.type == bfd_link_hash_defined
4148 || fdh->elf.root.type == bfd_link_hash_defweak))
4149 {
4150 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4151 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4152 if (entry_vis < descr_vis)
4153 fdh->elf.other += entry_vis - descr_vis;
4154 else if (entry_vis > descr_vis)
4155 eh->elf.other += descr_vis - entry_vis;
4156
4157 if (eh->elf.root.type == bfd_link_hash_undefined)
4158 {
4159 eh->elf.root.type = bfd_link_hash_undefweak;
4160 eh->was_undefined = 1;
4161 htab->twiddled_syms = 1;
4162 }
4163 }
4164
4165 return TRUE;
4166 }
4167
4168 static bfd_boolean
4169 ppc64_elf_check_directives (bfd *abfd ATTRIBUTE_UNUSED,
4170 struct bfd_link_info *info)
4171 {
4172 struct ppc_link_hash_table *htab;
4173 struct add_symbol_adjust_data data;
4174
4175 htab = ppc_hash_table (info);
4176 if (!is_ppc64_elf_target (htab->elf.root.creator))
4177 return TRUE;
4178
4179 data.info = info;
4180 data.ok = TRUE;
4181 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4182
4183 /* We need to fix the undefs list for any syms we have twiddled to
4184 undef_weak. */
4185 if (htab->twiddled_syms)
4186 {
4187 bfd_link_repair_undef_list (&htab->elf.root);
4188 htab->twiddled_syms = 0;
4189 }
4190 return data.ok;
4191 }
4192
4193 static bfd_boolean
4194 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4195 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4196 {
4197 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4198 char *local_got_tls_masks;
4199
4200 if (local_got_ents == NULL)
4201 {
4202 bfd_size_type size = symtab_hdr->sh_info;
4203
4204 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4205 local_got_ents = bfd_zalloc (abfd, size);
4206 if (local_got_ents == NULL)
4207 return FALSE;
4208 elf_local_got_ents (abfd) = local_got_ents;
4209 }
4210
4211 if ((tls_type & TLS_EXPLICIT) == 0)
4212 {
4213 struct got_entry *ent;
4214
4215 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4216 if (ent->addend == r_addend
4217 && ent->owner == abfd
4218 && ent->tls_type == tls_type)
4219 break;
4220 if (ent == NULL)
4221 {
4222 bfd_size_type amt = sizeof (*ent);
4223 ent = bfd_alloc (abfd, amt);
4224 if (ent == NULL)
4225 return FALSE;
4226 ent->next = local_got_ents[r_symndx];
4227 ent->addend = r_addend;
4228 ent->owner = abfd;
4229 ent->tls_type = tls_type;
4230 ent->got.refcount = 0;
4231 local_got_ents[r_symndx] = ent;
4232 }
4233 ent->got.refcount += 1;
4234 }
4235
4236 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4237 local_got_tls_masks[r_symndx] |= tls_type;
4238 return TRUE;
4239 }
4240
4241 static bfd_boolean
4242 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4243 {
4244 struct plt_entry *ent;
4245
4246 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4247 if (ent->addend == addend)
4248 break;
4249 if (ent == NULL)
4250 {
4251 bfd_size_type amt = sizeof (*ent);
4252 ent = bfd_alloc (abfd, amt);
4253 if (ent == NULL)
4254 return FALSE;
4255 ent->next = eh->elf.plt.plist;
4256 ent->addend = addend;
4257 ent->plt.refcount = 0;
4258 eh->elf.plt.plist = ent;
4259 }
4260 ent->plt.refcount += 1;
4261 eh->elf.needs_plt = 1;
4262 if (eh->elf.root.root.string[0] == '.'
4263 && eh->elf.root.root.string[1] != '\0')
4264 eh->is_func = 1;
4265 return TRUE;
4266 }
4267
4268 /* Look through the relocs for a section during the first phase, and
4269 calculate needed space in the global offset table, procedure
4270 linkage table, and dynamic reloc sections. */
4271
4272 static bfd_boolean
4273 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4274 asection *sec, const Elf_Internal_Rela *relocs)
4275 {
4276 struct ppc_link_hash_table *htab;
4277 Elf_Internal_Shdr *symtab_hdr;
4278 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4279 const Elf_Internal_Rela *rel;
4280 const Elf_Internal_Rela *rel_end;
4281 asection *sreloc;
4282 asection **opd_sym_map;
4283
4284 if (info->relocatable)
4285 return TRUE;
4286
4287 /* Don't do anything special with non-loaded, non-alloced sections.
4288 In particular, any relocs in such sections should not affect GOT
4289 and PLT reference counting (ie. we don't allow them to create GOT
4290 or PLT entries), there's no possibility or desire to optimize TLS
4291 relocs, and there's not much point in propagating relocs to shared
4292 libs that the dynamic linker won't relocate. */
4293 if ((sec->flags & SEC_ALLOC) == 0)
4294 return TRUE;
4295
4296 htab = ppc_hash_table (info);
4297 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4298
4299 sym_hashes = elf_sym_hashes (abfd);
4300 sym_hashes_end = (sym_hashes
4301 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4302 - symtab_hdr->sh_info);
4303
4304 sreloc = NULL;
4305 opd_sym_map = NULL;
4306 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4307 {
4308 /* Garbage collection needs some extra help with .opd sections.
4309 We don't want to necessarily keep everything referenced by
4310 relocs in .opd, as that would keep all functions. Instead,
4311 if we reference an .opd symbol (a function descriptor), we
4312 want to keep the function code symbol's section. This is
4313 easy for global symbols, but for local syms we need to keep
4314 information about the associated function section. Later, if
4315 edit_opd deletes entries, we'll use this array to adjust
4316 local syms in .opd. */
4317 union opd_info {
4318 asection *func_section;
4319 long entry_adjust;
4320 };
4321 bfd_size_type amt;
4322
4323 amt = sec->size * sizeof (union opd_info) / 8;
4324 opd_sym_map = bfd_zalloc (abfd, amt);
4325 if (opd_sym_map == NULL)
4326 return FALSE;
4327 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4328 }
4329
4330 if (htab->sfpr == NULL
4331 && !create_linkage_sections (htab->elf.dynobj, info))
4332 return FALSE;
4333
4334 rel_end = relocs + sec->reloc_count;
4335 for (rel = relocs; rel < rel_end; rel++)
4336 {
4337 unsigned long r_symndx;
4338 struct elf_link_hash_entry *h;
4339 enum elf_ppc64_reloc_type r_type;
4340 int tls_type = 0;
4341
4342 r_symndx = ELF64_R_SYM (rel->r_info);
4343 if (r_symndx < symtab_hdr->sh_info)
4344 h = NULL;
4345 else
4346 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4347
4348 r_type = ELF64_R_TYPE (rel->r_info);
4349 switch (r_type)
4350 {
4351 case R_PPC64_GOT_TLSLD16:
4352 case R_PPC64_GOT_TLSLD16_LO:
4353 case R_PPC64_GOT_TLSLD16_HI:
4354 case R_PPC64_GOT_TLSLD16_HA:
4355 ppc64_tlsld_got (abfd)->refcount += 1;
4356 tls_type = TLS_TLS | TLS_LD;
4357 goto dogottls;
4358
4359 case R_PPC64_GOT_TLSGD16:
4360 case R_PPC64_GOT_TLSGD16_LO:
4361 case R_PPC64_GOT_TLSGD16_HI:
4362 case R_PPC64_GOT_TLSGD16_HA:
4363 tls_type = TLS_TLS | TLS_GD;
4364 goto dogottls;
4365
4366 case R_PPC64_GOT_TPREL16_DS:
4367 case R_PPC64_GOT_TPREL16_LO_DS:
4368 case R_PPC64_GOT_TPREL16_HI:
4369 case R_PPC64_GOT_TPREL16_HA:
4370 if (info->shared)
4371 info->flags |= DF_STATIC_TLS;
4372 tls_type = TLS_TLS | TLS_TPREL;
4373 goto dogottls;
4374
4375 case R_PPC64_GOT_DTPREL16_DS:
4376 case R_PPC64_GOT_DTPREL16_LO_DS:
4377 case R_PPC64_GOT_DTPREL16_HI:
4378 case R_PPC64_GOT_DTPREL16_HA:
4379 tls_type = TLS_TLS | TLS_DTPREL;
4380 dogottls:
4381 sec->has_tls_reloc = 1;
4382 /* Fall thru */
4383
4384 case R_PPC64_GOT16:
4385 case R_PPC64_GOT16_DS:
4386 case R_PPC64_GOT16_HA:
4387 case R_PPC64_GOT16_HI:
4388 case R_PPC64_GOT16_LO:
4389 case R_PPC64_GOT16_LO_DS:
4390 /* This symbol requires a global offset table entry. */
4391 sec->has_toc_reloc = 1;
4392 if (ppc64_elf_tdata (abfd)->got == NULL
4393 && !create_got_section (abfd, info))
4394 return FALSE;
4395
4396 if (h != NULL)
4397 {
4398 struct ppc_link_hash_entry *eh;
4399 struct got_entry *ent;
4400
4401 eh = (struct ppc_link_hash_entry *) h;
4402 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4403 if (ent->addend == rel->r_addend
4404 && ent->owner == abfd
4405 && ent->tls_type == tls_type)
4406 break;
4407 if (ent == NULL)
4408 {
4409 bfd_size_type amt = sizeof (*ent);
4410 ent = bfd_alloc (abfd, amt);
4411 if (ent == NULL)
4412 return FALSE;
4413 ent->next = eh->elf.got.glist;
4414 ent->addend = rel->r_addend;
4415 ent->owner = abfd;
4416 ent->tls_type = tls_type;
4417 ent->got.refcount = 0;
4418 eh->elf.got.glist = ent;
4419 }
4420 ent->got.refcount += 1;
4421 eh->tls_mask |= tls_type;
4422 }
4423 else
4424 /* This is a global offset table entry for a local symbol. */
4425 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4426 rel->r_addend, tls_type))
4427 return FALSE;
4428 break;
4429
4430 case R_PPC64_PLT16_HA:
4431 case R_PPC64_PLT16_HI:
4432 case R_PPC64_PLT16_LO:
4433 case R_PPC64_PLT32:
4434 case R_PPC64_PLT64:
4435 /* This symbol requires a procedure linkage table entry. We
4436 actually build the entry in adjust_dynamic_symbol,
4437 because this might be a case of linking PIC code without
4438 linking in any dynamic objects, in which case we don't
4439 need to generate a procedure linkage table after all. */
4440 if (h == NULL)
4441 {
4442 /* It does not make sense to have a procedure linkage
4443 table entry for a local symbol. */
4444 bfd_set_error (bfd_error_bad_value);
4445 return FALSE;
4446 }
4447 else
4448 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4449 rel->r_addend))
4450 return FALSE;
4451 break;
4452
4453 /* The following relocations don't need to propagate the
4454 relocation if linking a shared object since they are
4455 section relative. */
4456 case R_PPC64_SECTOFF:
4457 case R_PPC64_SECTOFF_LO:
4458 case R_PPC64_SECTOFF_HI:
4459 case R_PPC64_SECTOFF_HA:
4460 case R_PPC64_SECTOFF_DS:
4461 case R_PPC64_SECTOFF_LO_DS:
4462 case R_PPC64_DTPREL16:
4463 case R_PPC64_DTPREL16_LO:
4464 case R_PPC64_DTPREL16_HI:
4465 case R_PPC64_DTPREL16_HA:
4466 case R_PPC64_DTPREL16_DS:
4467 case R_PPC64_DTPREL16_LO_DS:
4468 case R_PPC64_DTPREL16_HIGHER:
4469 case R_PPC64_DTPREL16_HIGHERA:
4470 case R_PPC64_DTPREL16_HIGHEST:
4471 case R_PPC64_DTPREL16_HIGHESTA:
4472 break;
4473
4474 /* Nor do these. */
4475 case R_PPC64_TOC16:
4476 case R_PPC64_TOC16_LO:
4477 case R_PPC64_TOC16_HI:
4478 case R_PPC64_TOC16_HA:
4479 case R_PPC64_TOC16_DS:
4480 case R_PPC64_TOC16_LO_DS:
4481 sec->has_toc_reloc = 1;
4482 break;
4483
4484 /* This relocation describes the C++ object vtable hierarchy.
4485 Reconstruct it for later use during GC. */
4486 case R_PPC64_GNU_VTINHERIT:
4487 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4488 return FALSE;
4489 break;
4490
4491 /* This relocation describes which C++ vtable entries are actually
4492 used. Record for later use during GC. */
4493 case R_PPC64_GNU_VTENTRY:
4494 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4495 return FALSE;
4496 break;
4497
4498 case R_PPC64_REL14:
4499 case R_PPC64_REL14_BRTAKEN:
4500 case R_PPC64_REL14_BRNTAKEN:
4501 htab->has_14bit_branch = 1;
4502 /* Fall through. */
4503
4504 case R_PPC64_REL24:
4505 if (h != NULL)
4506 {
4507 /* We may need a .plt entry if the function this reloc
4508 refers to is in a shared lib. */
4509 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4510 rel->r_addend))
4511 return FALSE;
4512 if (h == &htab->tls_get_addr->elf
4513 || h == &htab->tls_get_addr_fd->elf)
4514 sec->has_tls_reloc = 1;
4515 else if (htab->tls_get_addr == NULL
4516 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4517 && (h->root.root.string[15] == 0
4518 || h->root.root.string[15] == '@'))
4519 {
4520 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4521 sec->has_tls_reloc = 1;
4522 }
4523 else if (htab->tls_get_addr_fd == NULL
4524 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4525 && (h->root.root.string[14] == 0
4526 || h->root.root.string[14] == '@'))
4527 {
4528 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4529 sec->has_tls_reloc = 1;
4530 }
4531 }
4532 break;
4533
4534 case R_PPC64_TPREL64:
4535 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4536 if (info->shared)
4537 info->flags |= DF_STATIC_TLS;
4538 goto dotlstoc;
4539
4540 case R_PPC64_DTPMOD64:
4541 if (rel + 1 < rel_end
4542 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4543 && rel[1].r_offset == rel->r_offset + 8)
4544 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4545 else
4546 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4547 goto dotlstoc;
4548
4549 case R_PPC64_DTPREL64:
4550 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4551 if (rel != relocs
4552 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4553 && rel[-1].r_offset == rel->r_offset - 8)
4554 /* This is the second reloc of a dtpmod, dtprel pair.
4555 Don't mark with TLS_DTPREL. */
4556 goto dodyn;
4557
4558 dotlstoc:
4559 sec->has_tls_reloc = 1;
4560 if (h != NULL)
4561 {
4562 struct ppc_link_hash_entry *eh;
4563 eh = (struct ppc_link_hash_entry *) h;
4564 eh->tls_mask |= tls_type;
4565 }
4566 else
4567 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4568 rel->r_addend, tls_type))
4569 return FALSE;
4570
4571 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4572 {
4573 /* One extra to simplify get_tls_mask. */
4574 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4575 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4576 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4577 return FALSE;
4578 }
4579 BFD_ASSERT (rel->r_offset % 8 == 0);
4580 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4581
4582 /* Mark the second slot of a GD or LD entry.
4583 -1 to indicate GD and -2 to indicate LD. */
4584 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4585 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4586 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4587 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4588 goto dodyn;
4589
4590 case R_PPC64_TPREL16:
4591 case R_PPC64_TPREL16_LO:
4592 case R_PPC64_TPREL16_HI:
4593 case R_PPC64_TPREL16_HA:
4594 case R_PPC64_TPREL16_DS:
4595 case R_PPC64_TPREL16_LO_DS:
4596 case R_PPC64_TPREL16_HIGHER:
4597 case R_PPC64_TPREL16_HIGHERA:
4598 case R_PPC64_TPREL16_HIGHEST:
4599 case R_PPC64_TPREL16_HIGHESTA:
4600 if (info->shared)
4601 {
4602 info->flags |= DF_STATIC_TLS;
4603 goto dodyn;
4604 }
4605 break;
4606
4607 case R_PPC64_ADDR64:
4608 if (opd_sym_map != NULL
4609 && rel + 1 < rel_end
4610 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4611 {
4612 if (h != NULL)
4613 {
4614 if (h->root.root.string[0] == '.'
4615 && h->root.root.string[1] != 0
4616 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4617 ;
4618 else
4619 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4620 }
4621 else
4622 {
4623 asection *s;
4624
4625 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4626 r_symndx);
4627 if (s == NULL)
4628 return FALSE;
4629 else if (s != sec)
4630 opd_sym_map[rel->r_offset / 8] = s;
4631 }
4632 }
4633 /* Fall through. */
4634
4635 case R_PPC64_REL30:
4636 case R_PPC64_REL32:
4637 case R_PPC64_REL64:
4638 case R_PPC64_ADDR14:
4639 case R_PPC64_ADDR14_BRNTAKEN:
4640 case R_PPC64_ADDR14_BRTAKEN:
4641 case R_PPC64_ADDR16:
4642 case R_PPC64_ADDR16_DS:
4643 case R_PPC64_ADDR16_HA:
4644 case R_PPC64_ADDR16_HI:
4645 case R_PPC64_ADDR16_HIGHER:
4646 case R_PPC64_ADDR16_HIGHERA:
4647 case R_PPC64_ADDR16_HIGHEST:
4648 case R_PPC64_ADDR16_HIGHESTA:
4649 case R_PPC64_ADDR16_LO:
4650 case R_PPC64_ADDR16_LO_DS:
4651 case R_PPC64_ADDR24:
4652 case R_PPC64_ADDR32:
4653 case R_PPC64_UADDR16:
4654 case R_PPC64_UADDR32:
4655 case R_PPC64_UADDR64:
4656 case R_PPC64_TOC:
4657 if (h != NULL && !info->shared)
4658 /* We may need a copy reloc. */
4659 h->non_got_ref = 1;
4660
4661 /* Don't propagate .opd relocs. */
4662 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4663 break;
4664
4665 /* If we are creating a shared library, and this is a reloc
4666 against a global symbol, or a non PC relative reloc
4667 against a local symbol, then we need to copy the reloc
4668 into the shared library. However, if we are linking with
4669 -Bsymbolic, we do not need to copy a reloc against a
4670 global symbol which is defined in an object we are
4671 including in the link (i.e., DEF_REGULAR is set). At
4672 this point we have not seen all the input files, so it is
4673 possible that DEF_REGULAR is not set now but will be set
4674 later (it is never cleared). In case of a weak definition,
4675 DEF_REGULAR may be cleared later by a strong definition in
4676 a shared library. We account for that possibility below by
4677 storing information in the dyn_relocs field of the hash
4678 table entry. A similar situation occurs when creating
4679 shared libraries and symbol visibility changes render the
4680 symbol local.
4681
4682 If on the other hand, we are creating an executable, we
4683 may need to keep relocations for symbols satisfied by a
4684 dynamic library if we manage to avoid copy relocs for the
4685 symbol. */
4686 dodyn:
4687 if ((info->shared
4688 && (MUST_BE_DYN_RELOC (r_type)
4689 || (h != NULL
4690 && (! info->symbolic
4691 || h->root.type == bfd_link_hash_defweak
4692 || !h->def_regular))))
4693 || (ELIMINATE_COPY_RELOCS
4694 && !info->shared
4695 && h != NULL
4696 && (h->root.type == bfd_link_hash_defweak
4697 || !h->def_regular)))
4698 {
4699 struct ppc_dyn_relocs *p;
4700 struct ppc_dyn_relocs **head;
4701
4702 /* We must copy these reloc types into the output file.
4703 Create a reloc section in dynobj and make room for
4704 this reloc. */
4705 if (sreloc == NULL)
4706 {
4707 const char *name;
4708 bfd *dynobj;
4709
4710 name = (bfd_elf_string_from_elf_section
4711 (abfd,
4712 elf_elfheader (abfd)->e_shstrndx,
4713 elf_section_data (sec)->rel_hdr.sh_name));
4714 if (name == NULL)
4715 return FALSE;
4716
4717 if (strncmp (name, ".rela", 5) != 0
4718 || strcmp (bfd_get_section_name (abfd, sec),
4719 name + 5) != 0)
4720 {
4721 (*_bfd_error_handler)
4722 (_("%B: bad relocation section name `%s\'"),
4723 abfd, name);
4724 bfd_set_error (bfd_error_bad_value);
4725 }
4726
4727 dynobj = htab->elf.dynobj;
4728 sreloc = bfd_get_section_by_name (dynobj, name);
4729 if (sreloc == NULL)
4730 {
4731 flagword flags;
4732
4733 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4734 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4735 | SEC_ALLOC | SEC_LOAD);
4736 sreloc = bfd_make_section_with_flags (dynobj,
4737 name,
4738 flags);
4739 if (sreloc == NULL
4740 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4741 return FALSE;
4742 }
4743 elf_section_data (sec)->sreloc = sreloc;
4744 }
4745
4746 /* If this is a global symbol, we count the number of
4747 relocations we need for this symbol. */
4748 if (h != NULL)
4749 {
4750 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4751 }
4752 else
4753 {
4754 /* Track dynamic relocs needed for local syms too.
4755 We really need local syms available to do this
4756 easily. Oh well. */
4757
4758 asection *s;
4759 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4760 sec, r_symndx);
4761 if (s == NULL)
4762 return FALSE;
4763
4764 head = ((struct ppc_dyn_relocs **)
4765 &elf_section_data (s)->local_dynrel);
4766 }
4767
4768 p = *head;
4769 if (p == NULL || p->sec != sec)
4770 {
4771 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4772 if (p == NULL)
4773 return FALSE;
4774 p->next = *head;
4775 *head = p;
4776 p->sec = sec;
4777 p->count = 0;
4778 p->pc_count = 0;
4779 }
4780
4781 p->count += 1;
4782 if (!MUST_BE_DYN_RELOC (r_type))
4783 p->pc_count += 1;
4784 }
4785 break;
4786
4787 default:
4788 break;
4789 }
4790 }
4791
4792 return TRUE;
4793 }
4794
4795 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4796 of the code entry point, and its section. */
4797
4798 static bfd_vma
4799 opd_entry_value (asection *opd_sec,
4800 bfd_vma offset,
4801 asection **code_sec,
4802 bfd_vma *code_off)
4803 {
4804 bfd *opd_bfd = opd_sec->owner;
4805 Elf_Internal_Rela *relocs;
4806 Elf_Internal_Rela *lo, *hi, *look;
4807 bfd_vma val;
4808
4809 /* No relocs implies we are linking a --just-symbols object. */
4810 if (opd_sec->reloc_count == 0)
4811 {
4812 bfd_vma val;
4813
4814 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4815 return (bfd_vma) -1;
4816
4817 if (code_sec != NULL)
4818 {
4819 asection *sec, *likely = NULL;
4820 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4821 if (sec->vma <= val
4822 && (sec->flags & SEC_LOAD) != 0
4823 && (sec->flags & SEC_ALLOC) != 0)
4824 likely = sec;
4825 if (likely != NULL)
4826 {
4827 *code_sec = likely;
4828 if (code_off != NULL)
4829 *code_off = val - likely->vma;
4830 }
4831 }
4832 return val;
4833 }
4834
4835 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4836 if (relocs == NULL)
4837 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4838
4839 /* Go find the opd reloc at the sym address. */
4840 lo = relocs;
4841 BFD_ASSERT (lo != NULL);
4842 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4843 val = (bfd_vma) -1;
4844 while (lo < hi)
4845 {
4846 look = lo + (hi - lo) / 2;
4847 if (look->r_offset < offset)
4848 lo = look + 1;
4849 else if (look->r_offset > offset)
4850 hi = look;
4851 else
4852 {
4853 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4854 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4855 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4856 {
4857 unsigned long symndx = ELF64_R_SYM (look->r_info);
4858 asection *sec;
4859
4860 if (symndx < symtab_hdr->sh_info)
4861 {
4862 Elf_Internal_Sym *sym;
4863
4864 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4865 if (sym == NULL)
4866 {
4867 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4868 symtab_hdr->sh_info,
4869 0, NULL, NULL, NULL);
4870 if (sym == NULL)
4871 break;
4872 symtab_hdr->contents = (bfd_byte *) sym;
4873 }
4874
4875 sym += symndx;
4876 val = sym->st_value;
4877 sec = NULL;
4878 if ((sym->st_shndx != SHN_UNDEF
4879 && sym->st_shndx < SHN_LORESERVE)
4880 || sym->st_shndx > SHN_HIRESERVE)
4881 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4882 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4883 }
4884 else
4885 {
4886 struct elf_link_hash_entry **sym_hashes;
4887 struct elf_link_hash_entry *rh;
4888
4889 sym_hashes = elf_sym_hashes (opd_bfd);
4890 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4891 while (rh->root.type == bfd_link_hash_indirect
4892 || rh->root.type == bfd_link_hash_warning)
4893 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4894 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4895 || rh->root.type == bfd_link_hash_defweak);
4896 val = rh->root.u.def.value;
4897 sec = rh->root.u.def.section;
4898 }
4899 val += look->r_addend;
4900 if (code_off != NULL)
4901 *code_off = val;
4902 if (code_sec != NULL)
4903 *code_sec = sec;
4904 if (sec != NULL && sec->output_section != NULL)
4905 val += sec->output_section->vma + sec->output_offset;
4906 }
4907 break;
4908 }
4909 }
4910
4911 return val;
4912 }
4913
4914 /* Return the section that should be marked against GC for a given
4915 relocation. */
4916
4917 static asection *
4918 ppc64_elf_gc_mark_hook (asection *sec,
4919 struct bfd_link_info *info,
4920 Elf_Internal_Rela *rel,
4921 struct elf_link_hash_entry *h,
4922 Elf_Internal_Sym *sym)
4923 {
4924 asection *rsec;
4925
4926 /* First mark all our entry sym sections. */
4927 if (info->gc_sym_list != NULL)
4928 {
4929 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4930 struct bfd_sym_chain *sym = info->gc_sym_list;
4931
4932 info->gc_sym_list = NULL;
4933 do
4934 {
4935 struct ppc_link_hash_entry *eh;
4936
4937 eh = (struct ppc_link_hash_entry *)
4938 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4939 if (eh == NULL)
4940 continue;
4941 if (eh->elf.root.type != bfd_link_hash_defined
4942 && eh->elf.root.type != bfd_link_hash_defweak)
4943 continue;
4944
4945 if (eh->is_func_descriptor
4946 && (eh->oh->elf.root.type == bfd_link_hash_defined
4947 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4948 rsec = eh->oh->elf.root.u.def.section;
4949 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4950 && opd_entry_value (eh->elf.root.u.def.section,
4951 eh->elf.root.u.def.value,
4952 &rsec, NULL) != (bfd_vma) -1)
4953 ;
4954 else
4955 continue;
4956
4957 if (!rsec->gc_mark)
4958 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4959
4960 rsec = eh->elf.root.u.def.section;
4961 if (!rsec->gc_mark)
4962 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4963
4964 sym = sym->next;
4965 }
4966 while (sym != NULL);
4967 }
4968
4969 /* Syms return NULL if we're marking .opd, so we avoid marking all
4970 function sections, as all functions are referenced in .opd. */
4971 rsec = NULL;
4972 if (get_opd_info (sec) != NULL)
4973 return rsec;
4974
4975 if (h != NULL)
4976 {
4977 enum elf_ppc64_reloc_type r_type;
4978 struct ppc_link_hash_entry *eh;
4979
4980 r_type = ELF64_R_TYPE (rel->r_info);
4981 switch (r_type)
4982 {
4983 case R_PPC64_GNU_VTINHERIT:
4984 case R_PPC64_GNU_VTENTRY:
4985 break;
4986
4987 default:
4988 switch (h->root.type)
4989 {
4990 case bfd_link_hash_defined:
4991 case bfd_link_hash_defweak:
4992 eh = (struct ppc_link_hash_entry *) h;
4993 if (eh->oh != NULL
4994 && eh->oh->is_func_descriptor
4995 && (eh->oh->elf.root.type == bfd_link_hash_defined
4996 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4997 eh = eh->oh;
4998
4999 /* Function descriptor syms cause the associated
5000 function code sym section to be marked. */
5001 if (eh->is_func_descriptor
5002 && (eh->oh->elf.root.type == bfd_link_hash_defined
5003 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5004 {
5005 /* They also mark their opd section. */
5006 if (!eh->elf.root.u.def.section->gc_mark)
5007 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5008 ppc64_elf_gc_mark_hook);
5009
5010 rsec = eh->oh->elf.root.u.def.section;
5011 }
5012 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5013 && opd_entry_value (eh->elf.root.u.def.section,
5014 eh->elf.root.u.def.value,
5015 &rsec, NULL) != (bfd_vma) -1)
5016 {
5017 if (!eh->elf.root.u.def.section->gc_mark)
5018 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5019 ppc64_elf_gc_mark_hook);
5020 }
5021 else
5022 rsec = h->root.u.def.section;
5023 break;
5024
5025 case bfd_link_hash_common:
5026 rsec = h->root.u.c.p->section;
5027 break;
5028
5029 default:
5030 break;
5031 }
5032 }
5033 }
5034 else
5035 {
5036 asection **opd_sym_section;
5037
5038 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5039 opd_sym_section = get_opd_info (rsec);
5040 if (opd_sym_section != NULL)
5041 {
5042 if (!rsec->gc_mark)
5043 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5044
5045 rsec = opd_sym_section[sym->st_value / 8];
5046 }
5047 }
5048
5049 return rsec;
5050 }
5051
5052 /* Update the .got, .plt. and dynamic reloc reference counts for the
5053 section being removed. */
5054
5055 static bfd_boolean
5056 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5057 asection *sec, const Elf_Internal_Rela *relocs)
5058 {
5059 struct ppc_link_hash_table *htab;
5060 Elf_Internal_Shdr *symtab_hdr;
5061 struct elf_link_hash_entry **sym_hashes;
5062 struct got_entry **local_got_ents;
5063 const Elf_Internal_Rela *rel, *relend;
5064
5065 if ((sec->flags & SEC_ALLOC) == 0)
5066 return TRUE;
5067
5068 elf_section_data (sec)->local_dynrel = NULL;
5069
5070 htab = ppc_hash_table (info);
5071 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5072 sym_hashes = elf_sym_hashes (abfd);
5073 local_got_ents = elf_local_got_ents (abfd);
5074
5075 relend = relocs + sec->reloc_count;
5076 for (rel = relocs; rel < relend; rel++)
5077 {
5078 unsigned long r_symndx;
5079 enum elf_ppc64_reloc_type r_type;
5080 struct elf_link_hash_entry *h = NULL;
5081 char tls_type = 0;
5082
5083 r_symndx = ELF64_R_SYM (rel->r_info);
5084 r_type = ELF64_R_TYPE (rel->r_info);
5085 if (r_symndx >= symtab_hdr->sh_info)
5086 {
5087 struct ppc_link_hash_entry *eh;
5088 struct ppc_dyn_relocs **pp;
5089 struct ppc_dyn_relocs *p;
5090
5091 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5092 while (h->root.type == bfd_link_hash_indirect
5093 || h->root.type == bfd_link_hash_warning)
5094 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5095 eh = (struct ppc_link_hash_entry *) h;
5096
5097 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5098 if (p->sec == sec)
5099 {
5100 /* Everything must go for SEC. */
5101 *pp = p->next;
5102 break;
5103 }
5104 }
5105
5106 switch (r_type)
5107 {
5108 case R_PPC64_GOT_TLSLD16:
5109 case R_PPC64_GOT_TLSLD16_LO:
5110 case R_PPC64_GOT_TLSLD16_HI:
5111 case R_PPC64_GOT_TLSLD16_HA:
5112 ppc64_tlsld_got (abfd)->refcount -= 1;
5113 tls_type = TLS_TLS | TLS_LD;
5114 goto dogot;
5115
5116 case R_PPC64_GOT_TLSGD16:
5117 case R_PPC64_GOT_TLSGD16_LO:
5118 case R_PPC64_GOT_TLSGD16_HI:
5119 case R_PPC64_GOT_TLSGD16_HA:
5120 tls_type = TLS_TLS | TLS_GD;
5121 goto dogot;
5122
5123 case R_PPC64_GOT_TPREL16_DS:
5124 case R_PPC64_GOT_TPREL16_LO_DS:
5125 case R_PPC64_GOT_TPREL16_HI:
5126 case R_PPC64_GOT_TPREL16_HA:
5127 tls_type = TLS_TLS | TLS_TPREL;
5128 goto dogot;
5129
5130 case R_PPC64_GOT_DTPREL16_DS:
5131 case R_PPC64_GOT_DTPREL16_LO_DS:
5132 case R_PPC64_GOT_DTPREL16_HI:
5133 case R_PPC64_GOT_DTPREL16_HA:
5134 tls_type = TLS_TLS | TLS_DTPREL;
5135 goto dogot;
5136
5137 case R_PPC64_GOT16:
5138 case R_PPC64_GOT16_DS:
5139 case R_PPC64_GOT16_HA:
5140 case R_PPC64_GOT16_HI:
5141 case R_PPC64_GOT16_LO:
5142 case R_PPC64_GOT16_LO_DS:
5143 dogot:
5144 {
5145 struct got_entry *ent;
5146
5147 if (h != NULL)
5148 ent = h->got.glist;
5149 else
5150 ent = local_got_ents[r_symndx];
5151
5152 for (; ent != NULL; ent = ent->next)
5153 if (ent->addend == rel->r_addend
5154 && ent->owner == abfd
5155 && ent->tls_type == tls_type)
5156 break;
5157 if (ent == NULL)
5158 abort ();
5159 if (ent->got.refcount > 0)
5160 ent->got.refcount -= 1;
5161 }
5162 break;
5163
5164 case R_PPC64_PLT16_HA:
5165 case R_PPC64_PLT16_HI:
5166 case R_PPC64_PLT16_LO:
5167 case R_PPC64_PLT32:
5168 case R_PPC64_PLT64:
5169 case R_PPC64_REL14:
5170 case R_PPC64_REL14_BRNTAKEN:
5171 case R_PPC64_REL14_BRTAKEN:
5172 case R_PPC64_REL24:
5173 if (h != NULL)
5174 {
5175 struct plt_entry *ent;
5176
5177 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5178 if (ent->addend == rel->r_addend)
5179 break;
5180 if (ent == NULL)
5181 abort ();
5182 if (ent->plt.refcount > 0)
5183 ent->plt.refcount -= 1;
5184 }
5185 break;
5186
5187 default:
5188 break;
5189 }
5190 }
5191 return TRUE;
5192 }
5193
5194 /* The maximum size of .sfpr. */
5195 #define SFPR_MAX (218*4)
5196
5197 struct sfpr_def_parms
5198 {
5199 const char name[12];
5200 unsigned char lo, hi;
5201 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5202 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5203 };
5204
5205 /* Auto-generate _save*, _rest* functions in .sfpr. */
5206
5207 static unsigned int
5208 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5209 {
5210 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5211 unsigned int i;
5212 size_t len = strlen (parm->name);
5213 bfd_boolean writing = FALSE;
5214 char sym[16];
5215
5216 memcpy (sym, parm->name, len);
5217 sym[len + 2] = 0;
5218
5219 for (i = parm->lo; i <= parm->hi; i++)
5220 {
5221 struct elf_link_hash_entry *h;
5222
5223 sym[len + 0] = i / 10 + '0';
5224 sym[len + 1] = i % 10 + '0';
5225 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5226 if (h != NULL
5227 && !h->def_regular)
5228 {
5229 h->root.type = bfd_link_hash_defined;
5230 h->root.u.def.section = htab->sfpr;
5231 h->root.u.def.value = htab->sfpr->size;
5232 h->type = STT_FUNC;
5233 h->def_regular = 1;
5234 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5235 writing = TRUE;
5236 if (htab->sfpr->contents == NULL)
5237 {
5238 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5239 if (htab->sfpr->contents == NULL)
5240 return FALSE;
5241 }
5242 }
5243 if (writing)
5244 {
5245 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5246 if (i != parm->hi)
5247 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5248 else
5249 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5250 htab->sfpr->size = p - htab->sfpr->contents;
5251 }
5252 }
5253
5254 return TRUE;
5255 }
5256
5257 static bfd_byte *
5258 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5259 {
5260 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5261 return p + 4;
5262 }
5263
5264 static bfd_byte *
5265 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5266 {
5267 p = savegpr0 (abfd, p, r);
5268 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5269 p = p + 4;
5270 bfd_put_32 (abfd, BLR, p);
5271 return p + 4;
5272 }
5273
5274 static bfd_byte *
5275 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5276 {
5277 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5278 return p + 4;
5279 }
5280
5281 static bfd_byte *
5282 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5283 {
5284 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5285 p = p + 4;
5286 p = restgpr0 (abfd, p, r);
5287 bfd_put_32 (abfd, MTLR_R0, p);
5288 p = p + 4;
5289 if (r == 29)
5290 {
5291 p = restgpr0 (abfd, p, 30);
5292 p = restgpr0 (abfd, p, 31);
5293 }
5294 bfd_put_32 (abfd, BLR, p);
5295 return p + 4;
5296 }
5297
5298 static bfd_byte *
5299 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5300 {
5301 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5302 return p + 4;
5303 }
5304
5305 static bfd_byte *
5306 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5307 {
5308 p = savegpr1 (abfd, p, r);
5309 bfd_put_32 (abfd, BLR, p);
5310 return p + 4;
5311 }
5312
5313 static bfd_byte *
5314 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5315 {
5316 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5317 return p + 4;
5318 }
5319
5320 static bfd_byte *
5321 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5322 {
5323 p = restgpr1 (abfd, p, r);
5324 bfd_put_32 (abfd, BLR, p);
5325 return p + 4;
5326 }
5327
5328 static bfd_byte *
5329 savefpr (bfd *abfd, bfd_byte *p, int r)
5330 {
5331 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5332 return p + 4;
5333 }
5334
5335 static bfd_byte *
5336 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5337 {
5338 p = savefpr (abfd, p, r);
5339 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5340 p = p + 4;
5341 bfd_put_32 (abfd, BLR, p);
5342 return p + 4;
5343 }
5344
5345 static bfd_byte *
5346 restfpr (bfd *abfd, bfd_byte *p, int r)
5347 {
5348 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5349 return p + 4;
5350 }
5351
5352 static bfd_byte *
5353 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5354 {
5355 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5356 p = p + 4;
5357 p = restfpr (abfd, p, r);
5358 bfd_put_32 (abfd, MTLR_R0, p);
5359 p = p + 4;
5360 if (r == 29)
5361 {
5362 p = restfpr (abfd, p, 30);
5363 p = restfpr (abfd, p, 31);
5364 }
5365 bfd_put_32 (abfd, BLR, p);
5366 return p + 4;
5367 }
5368
5369 static bfd_byte *
5370 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5371 {
5372 p = savefpr (abfd, p, r);
5373 bfd_put_32 (abfd, BLR, p);
5374 return p + 4;
5375 }
5376
5377 static bfd_byte *
5378 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5379 {
5380 p = restfpr (abfd, p, r);
5381 bfd_put_32 (abfd, BLR, p);
5382 return p + 4;
5383 }
5384
5385 static bfd_byte *
5386 savevr (bfd *abfd, bfd_byte *p, int r)
5387 {
5388 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5389 p = p + 4;
5390 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5391 return p + 4;
5392 }
5393
5394 static bfd_byte *
5395 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5396 {
5397 p = savevr (abfd, p, r);
5398 bfd_put_32 (abfd, BLR, p);
5399 return p + 4;
5400 }
5401
5402 static bfd_byte *
5403 restvr (bfd *abfd, bfd_byte *p, int r)
5404 {
5405 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5406 p = p + 4;
5407 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5408 return p + 4;
5409 }
5410
5411 static bfd_byte *
5412 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5413 {
5414 p = restvr (abfd, p, r);
5415 bfd_put_32 (abfd, BLR, p);
5416 return p + 4;
5417 }
5418
5419 /* Called via elf_link_hash_traverse to transfer dynamic linking
5420 information on function code symbol entries to their corresponding
5421 function descriptor symbol entries. */
5422
5423 static bfd_boolean
5424 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5425 {
5426 struct bfd_link_info *info;
5427 struct ppc_link_hash_table *htab;
5428 struct plt_entry *ent;
5429 struct ppc_link_hash_entry *fh;
5430 struct ppc_link_hash_entry *fdh;
5431 bfd_boolean force_local;
5432
5433 fh = (struct ppc_link_hash_entry *) h;
5434 if (fh->elf.root.type == bfd_link_hash_indirect)
5435 return TRUE;
5436
5437 if (fh->elf.root.type == bfd_link_hash_warning)
5438 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5439
5440 info = inf;
5441 htab = ppc_hash_table (info);
5442
5443 /* Resolve undefined references to dot-symbols as the value
5444 in the function descriptor, if we have one in a regular object.
5445 This is to satisfy cases like ".quad .foo". Calls to functions
5446 in dynamic objects are handled elsewhere. */
5447 if (fh->elf.root.type == bfd_link_hash_undefweak
5448 && fh->was_undefined
5449 && (fh->oh->elf.root.type == bfd_link_hash_defined
5450 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5451 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5452 && opd_entry_value (fh->oh->elf.root.u.def.section,
5453 fh->oh->elf.root.u.def.value,
5454 &fh->elf.root.u.def.section,
5455 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5456 {
5457 fh->elf.root.type = fh->oh->elf.root.type;
5458 fh->elf.forced_local = 1;
5459 }
5460
5461 /* If this is a function code symbol, transfer dynamic linking
5462 information to the function descriptor symbol. */
5463 if (!fh->is_func)
5464 return TRUE;
5465
5466 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5467 if (ent->plt.refcount > 0)
5468 break;
5469 if (ent == NULL
5470 || fh->elf.root.root.string[0] != '.'
5471 || fh->elf.root.root.string[1] == '\0')
5472 return TRUE;
5473
5474 /* Find the corresponding function descriptor symbol. Create it
5475 as undefined if necessary. */
5476
5477 fdh = get_fdh (fh, htab);
5478 if (fdh != NULL)
5479 while (fdh->elf.root.type == bfd_link_hash_indirect
5480 || fdh->elf.root.type == bfd_link_hash_warning)
5481 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5482
5483 if (fdh == NULL
5484 && info->shared
5485 && (fh->elf.root.type == bfd_link_hash_undefined
5486 || fh->elf.root.type == bfd_link_hash_undefweak))
5487 {
5488 fdh = make_fdh (info, fh);
5489 if (fdh == NULL)
5490 return FALSE;
5491 }
5492
5493 /* Fake function descriptors are made undefweak. If the function
5494 code symbol is strong undefined, make the fake sym the same. */
5495
5496 if (fdh != NULL
5497 && fdh->fake
5498 && fdh->elf.root.type == bfd_link_hash_undefweak
5499 && fh->elf.root.type == bfd_link_hash_undefined)
5500 {
5501 fdh->elf.root.type = bfd_link_hash_undefined;
5502 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5503 }
5504
5505 if (fdh != NULL
5506 && !fdh->elf.forced_local
5507 && (info->shared
5508 || fdh->elf.def_dynamic
5509 || fdh->elf.ref_dynamic
5510 || (fdh->elf.root.type == bfd_link_hash_undefweak
5511 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5512 {
5513 if (fdh->elf.dynindx == -1)
5514 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5515 return FALSE;
5516 fdh->elf.ref_regular |= fh->elf.ref_regular;
5517 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5518 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5519 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5520 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5521 {
5522 move_plt_plist (fh, fdh);
5523 fdh->elf.needs_plt = 1;
5524 }
5525 fdh->is_func_descriptor = 1;
5526 fdh->oh = fh;
5527 fh->oh = fdh;
5528 }
5529
5530 /* Now that the info is on the function descriptor, clear the
5531 function code sym info. Any function code syms for which we
5532 don't have a definition in a regular file, we force local.
5533 This prevents a shared library from exporting syms that have
5534 been imported from another library. Function code syms that
5535 are really in the library we must leave global to prevent the
5536 linker dragging in a definition from a static library. */
5537 force_local = (!fh->elf.def_regular
5538 || fdh == NULL
5539 || !fdh->elf.def_regular
5540 || fdh->elf.forced_local);
5541 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5542
5543 return TRUE;
5544 }
5545
5546 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5547 this hook to a) provide some gcc support functions, and b) transfer
5548 dynamic linking information gathered so far on function code symbol
5549 entries, to their corresponding function descriptor symbol entries. */
5550
5551 static bfd_boolean
5552 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5553 struct bfd_link_info *info)
5554 {
5555 struct ppc_link_hash_table *htab;
5556 unsigned int i;
5557 const struct sfpr_def_parms funcs[] =
5558 {
5559 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5560 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5561 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5562 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5563 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5564 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5565 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5566 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5567 { "._savef", 14, 31, savefpr, savefpr1_tail },
5568 { "._restf", 14, 31, restfpr, restfpr1_tail },
5569 { "_savevr_", 20, 31, savevr, savevr_tail },
5570 { "_restvr_", 20, 31, restvr, restvr_tail }
5571 };
5572
5573 htab = ppc_hash_table (info);
5574 if (htab->sfpr == NULL)
5575 /* We don't have any relocs. */
5576 return TRUE;
5577
5578 /* Provide any missing _save* and _rest* functions. */
5579 htab->sfpr->size = 0;
5580 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5581 if (!sfpr_define (info, &funcs[i]))
5582 return FALSE;
5583
5584 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5585
5586 if (htab->sfpr->size == 0)
5587 htab->sfpr->flags |= SEC_EXCLUDE;
5588
5589 return TRUE;
5590 }
5591
5592 /* Adjust a symbol defined by a dynamic object and referenced by a
5593 regular object. The current definition is in some section of the
5594 dynamic object, but we're not including those sections. We have to
5595 change the definition to something the rest of the link can
5596 understand. */
5597
5598 static bfd_boolean
5599 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5600 struct elf_link_hash_entry *h)
5601 {
5602 struct ppc_link_hash_table *htab;
5603 asection *s;
5604 unsigned int power_of_two;
5605
5606 htab = ppc_hash_table (info);
5607
5608 /* Deal with function syms. */
5609 if (h->type == STT_FUNC
5610 || h->needs_plt)
5611 {
5612 /* Clear procedure linkage table information for any symbol that
5613 won't need a .plt entry. */
5614 struct plt_entry *ent;
5615 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5616 if (ent->plt.refcount > 0)
5617 break;
5618 if (ent == NULL
5619 || SYMBOL_CALLS_LOCAL (info, h)
5620 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5621 && h->root.type == bfd_link_hash_undefweak))
5622 {
5623 h->plt.plist = NULL;
5624 h->needs_plt = 0;
5625 }
5626 }
5627 else
5628 h->plt.plist = NULL;
5629
5630 /* If this is a weak symbol, and there is a real definition, the
5631 processor independent code will have arranged for us to see the
5632 real definition first, and we can just use the same value. */
5633 if (h->u.weakdef != NULL)
5634 {
5635 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5636 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5637 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5638 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5639 if (ELIMINATE_COPY_RELOCS)
5640 h->non_got_ref = h->u.weakdef->non_got_ref;
5641 return TRUE;
5642 }
5643
5644 /* If we are creating a shared library, we must presume that the
5645 only references to the symbol are via the global offset table.
5646 For such cases we need not do anything here; the relocations will
5647 be handled correctly by relocate_section. */
5648 if (info->shared)
5649 return TRUE;
5650
5651 /* If there are no references to this symbol that do not use the
5652 GOT, we don't need to generate a copy reloc. */
5653 if (!h->non_got_ref)
5654 return TRUE;
5655
5656 if (ELIMINATE_COPY_RELOCS)
5657 {
5658 struct ppc_link_hash_entry * eh;
5659 struct ppc_dyn_relocs *p;
5660
5661 eh = (struct ppc_link_hash_entry *) h;
5662 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5663 {
5664 s = p->sec->output_section;
5665 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5666 break;
5667 }
5668
5669 /* If we didn't find any dynamic relocs in read-only sections, then
5670 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5671 if (p == NULL)
5672 {
5673 h->non_got_ref = 0;
5674 return TRUE;
5675 }
5676 }
5677
5678 if (h->plt.plist != NULL)
5679 {
5680 /* We should never get here, but unfortunately there are versions
5681 of gcc out there that improperly (for this ABI) put initialized
5682 function pointers, vtable refs and suchlike in read-only
5683 sections. Allow them to proceed, but warn that this might
5684 break at runtime. */
5685 (*_bfd_error_handler)
5686 (_("copy reloc against `%s' requires lazy plt linking; "
5687 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5688 h->root.root.string);
5689 }
5690
5691 /* This is a reference to a symbol defined by a dynamic object which
5692 is not a function. */
5693
5694 /* We must allocate the symbol in our .dynbss section, which will
5695 become part of the .bss section of the executable. There will be
5696 an entry for this symbol in the .dynsym section. The dynamic
5697 object will contain position independent code, so all references
5698 from the dynamic object to this symbol will go through the global
5699 offset table. The dynamic linker will use the .dynsym entry to
5700 determine the address it must put in the global offset table, so
5701 both the dynamic object and the regular object will refer to the
5702 same memory location for the variable. */
5703
5704 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5705 to copy the initial value out of the dynamic object and into the
5706 runtime process image. We need to remember the offset into the
5707 .rela.bss section we are going to use. */
5708 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5709 {
5710 htab->relbss->size += sizeof (Elf64_External_Rela);
5711 h->needs_copy = 1;
5712 }
5713
5714 /* We need to figure out the alignment required for this symbol. I
5715 have no idea how ELF linkers handle this. */
5716 power_of_two = bfd_log2 (h->size);
5717 if (power_of_two > 4)
5718 power_of_two = 4;
5719
5720 /* Apply the required alignment. */
5721 s = htab->dynbss;
5722 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5723 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5724 {
5725 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5726 return FALSE;
5727 }
5728
5729 /* Define the symbol as being at this point in the section. */
5730 h->root.u.def.section = s;
5731 h->root.u.def.value = s->size;
5732
5733 /* Increment the section size to make room for the symbol. */
5734 s->size += h->size;
5735
5736 return TRUE;
5737 }
5738
5739 /* If given a function descriptor symbol, hide both the function code
5740 sym and the descriptor. */
5741 static void
5742 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5743 struct elf_link_hash_entry *h,
5744 bfd_boolean force_local)
5745 {
5746 struct ppc_link_hash_entry *eh;
5747 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5748
5749 eh = (struct ppc_link_hash_entry *) h;
5750 if (eh->is_func_descriptor)
5751 {
5752 struct ppc_link_hash_entry *fh = eh->oh;
5753
5754 if (fh == NULL)
5755 {
5756 const char *p, *q;
5757 struct ppc_link_hash_table *htab;
5758 char save;
5759
5760 /* We aren't supposed to use alloca in BFD because on
5761 systems which do not have alloca the version in libiberty
5762 calls xmalloc, which might cause the program to crash
5763 when it runs out of memory. This function doesn't have a
5764 return status, so there's no way to gracefully return an
5765 error. So cheat. We know that string[-1] can be safely
5766 accessed; It's either a string in an ELF string table,
5767 or allocated in an objalloc structure. */
5768
5769 p = eh->elf.root.root.string - 1;
5770 save = *p;
5771 *(char *) p = '.';
5772 htab = ppc_hash_table (info);
5773 fh = (struct ppc_link_hash_entry *)
5774 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5775 *(char *) p = save;
5776
5777 /* Unfortunately, if it so happens that the string we were
5778 looking for was allocated immediately before this string,
5779 then we overwrote the string terminator. That's the only
5780 reason the lookup should fail. */
5781 if (fh == NULL)
5782 {
5783 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5784 while (q >= eh->elf.root.root.string && *q == *p)
5785 --q, --p;
5786 if (q < eh->elf.root.root.string && *p == '.')
5787 fh = (struct ppc_link_hash_entry *)
5788 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5789 }
5790 if (fh != NULL)
5791 {
5792 eh->oh = fh;
5793 fh->oh = eh;
5794 }
5795 }
5796 if (fh != NULL)
5797 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5798 }
5799 }
5800
5801 static bfd_boolean
5802 get_sym_h (struct elf_link_hash_entry **hp,
5803 Elf_Internal_Sym **symp,
5804 asection **symsecp,
5805 char **tls_maskp,
5806 Elf_Internal_Sym **locsymsp,
5807 unsigned long r_symndx,
5808 bfd *ibfd)
5809 {
5810 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5811
5812 if (r_symndx >= symtab_hdr->sh_info)
5813 {
5814 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5815 struct elf_link_hash_entry *h;
5816
5817 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5818 while (h->root.type == bfd_link_hash_indirect
5819 || h->root.type == bfd_link_hash_warning)
5820 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5821
5822 if (hp != NULL)
5823 *hp = h;
5824
5825 if (symp != NULL)
5826 *symp = NULL;
5827
5828 if (symsecp != NULL)
5829 {
5830 asection *symsec = NULL;
5831 if (h->root.type == bfd_link_hash_defined
5832 || h->root.type == bfd_link_hash_defweak)
5833 symsec = h->root.u.def.section;
5834 *symsecp = symsec;
5835 }
5836
5837 if (tls_maskp != NULL)
5838 {
5839 struct ppc_link_hash_entry *eh;
5840
5841 eh = (struct ppc_link_hash_entry *) h;
5842 *tls_maskp = &eh->tls_mask;
5843 }
5844 }
5845 else
5846 {
5847 Elf_Internal_Sym *sym;
5848 Elf_Internal_Sym *locsyms = *locsymsp;
5849
5850 if (locsyms == NULL)
5851 {
5852 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5853 if (locsyms == NULL)
5854 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5855 symtab_hdr->sh_info,
5856 0, NULL, NULL, NULL);
5857 if (locsyms == NULL)
5858 return FALSE;
5859 *locsymsp = locsyms;
5860 }
5861 sym = locsyms + r_symndx;
5862
5863 if (hp != NULL)
5864 *hp = NULL;
5865
5866 if (symp != NULL)
5867 *symp = sym;
5868
5869 if (symsecp != NULL)
5870 {
5871 asection *symsec = NULL;
5872 if ((sym->st_shndx != SHN_UNDEF
5873 && sym->st_shndx < SHN_LORESERVE)
5874 || sym->st_shndx > SHN_HIRESERVE)
5875 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5876 *symsecp = symsec;
5877 }
5878
5879 if (tls_maskp != NULL)
5880 {
5881 struct got_entry **lgot_ents;
5882 char *tls_mask;
5883
5884 tls_mask = NULL;
5885 lgot_ents = elf_local_got_ents (ibfd);
5886 if (lgot_ents != NULL)
5887 {
5888 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5889 tls_mask = &lgot_masks[r_symndx];
5890 }
5891 *tls_maskp = tls_mask;
5892 }
5893 }
5894 return TRUE;
5895 }
5896
5897 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5898 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5899 type suitable for optimization, and 1 otherwise. */
5900
5901 static int
5902 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5903 Elf_Internal_Sym **locsymsp,
5904 const Elf_Internal_Rela *rel, bfd *ibfd)
5905 {
5906 unsigned long r_symndx;
5907 int next_r;
5908 struct elf_link_hash_entry *h;
5909 Elf_Internal_Sym *sym;
5910 asection *sec;
5911 bfd_vma off;
5912
5913 r_symndx = ELF64_R_SYM (rel->r_info);
5914 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5915 return 0;
5916
5917 if ((*tls_maskp != NULL && **tls_maskp != 0)
5918 || sec == NULL
5919 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5920 return 1;
5921
5922 /* Look inside a TOC section too. */
5923 if (h != NULL)
5924 {
5925 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5926 off = h->root.u.def.value;
5927 }
5928 else
5929 off = sym->st_value;
5930 off += rel->r_addend;
5931 BFD_ASSERT (off % 8 == 0);
5932 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5933 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5934 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5935 return 0;
5936 if (toc_symndx != NULL)
5937 *toc_symndx = r_symndx;
5938 if ((h == NULL
5939 || ((h->root.type == bfd_link_hash_defined
5940 || h->root.type == bfd_link_hash_defweak)
5941 && !h->def_dynamic))
5942 && (next_r == -1 || next_r == -2))
5943 return 1 - next_r;
5944 return 1;
5945 }
5946
5947 /* Adjust all global syms defined in opd sections. In gcc generated
5948 code for the old ABI, these will already have been done. */
5949
5950 static bfd_boolean
5951 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5952 {
5953 struct ppc_link_hash_entry *eh;
5954 asection *sym_sec;
5955 long *opd_adjust;
5956
5957 if (h->root.type == bfd_link_hash_indirect)
5958 return TRUE;
5959
5960 if (h->root.type == bfd_link_hash_warning)
5961 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5962
5963 if (h->root.type != bfd_link_hash_defined
5964 && h->root.type != bfd_link_hash_defweak)
5965 return TRUE;
5966
5967 eh = (struct ppc_link_hash_entry *) h;
5968 if (eh->adjust_done)
5969 return TRUE;
5970
5971 sym_sec = eh->elf.root.u.def.section;
5972 opd_adjust = get_opd_info (sym_sec);
5973 if (opd_adjust != NULL)
5974 {
5975 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5976 if (adjust == -1)
5977 {
5978 /* This entry has been deleted. */
5979 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5980 if (dsec == NULL)
5981 {
5982 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5983 if (elf_discarded_section (dsec))
5984 {
5985 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5986 break;
5987 }
5988 }
5989 eh->elf.root.u.def.value = 0;
5990 eh->elf.root.u.def.section = dsec;
5991 }
5992 else
5993 eh->elf.root.u.def.value += adjust;
5994 eh->adjust_done = 1;
5995 }
5996 return TRUE;
5997 }
5998
5999 /* Handles decrementing dynamic reloc counts for the reloc specified by
6000 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6001 have already been determined. */
6002
6003 static bfd_boolean
6004 dec_dynrel_count (bfd_vma r_info,
6005 asection *sec,
6006 struct bfd_link_info *info,
6007 Elf_Internal_Sym **local_syms,
6008 struct elf_link_hash_entry *h,
6009 asection *sym_sec)
6010 {
6011 enum elf_ppc64_reloc_type r_type;
6012 struct ppc_dyn_relocs *p;
6013 struct ppc_dyn_relocs **pp;
6014
6015 /* Can this reloc be dynamic? This switch, and later tests here
6016 should be kept in sync with the code in check_relocs. */
6017 r_type = ELF64_R_TYPE (r_info);
6018 switch (r_type)
6019 {
6020 default:
6021 return TRUE;
6022
6023 case R_PPC64_TPREL16:
6024 case R_PPC64_TPREL16_LO:
6025 case R_PPC64_TPREL16_HI:
6026 case R_PPC64_TPREL16_HA:
6027 case R_PPC64_TPREL16_DS:
6028 case R_PPC64_TPREL16_LO_DS:
6029 case R_PPC64_TPREL16_HIGHER:
6030 case R_PPC64_TPREL16_HIGHERA:
6031 case R_PPC64_TPREL16_HIGHEST:
6032 case R_PPC64_TPREL16_HIGHESTA:
6033 if (!info->shared)
6034 return TRUE;
6035
6036 case R_PPC64_TPREL64:
6037 case R_PPC64_DTPMOD64:
6038 case R_PPC64_DTPREL64:
6039 case R_PPC64_ADDR64:
6040 case R_PPC64_REL30:
6041 case R_PPC64_REL32:
6042 case R_PPC64_REL64:
6043 case R_PPC64_ADDR14:
6044 case R_PPC64_ADDR14_BRNTAKEN:
6045 case R_PPC64_ADDR14_BRTAKEN:
6046 case R_PPC64_ADDR16:
6047 case R_PPC64_ADDR16_DS:
6048 case R_PPC64_ADDR16_HA:
6049 case R_PPC64_ADDR16_HI:
6050 case R_PPC64_ADDR16_HIGHER:
6051 case R_PPC64_ADDR16_HIGHERA:
6052 case R_PPC64_ADDR16_HIGHEST:
6053 case R_PPC64_ADDR16_HIGHESTA:
6054 case R_PPC64_ADDR16_LO:
6055 case R_PPC64_ADDR16_LO_DS:
6056 case R_PPC64_ADDR24:
6057 case R_PPC64_ADDR32:
6058 case R_PPC64_UADDR16:
6059 case R_PPC64_UADDR32:
6060 case R_PPC64_UADDR64:
6061 case R_PPC64_TOC:
6062 break;
6063 }
6064
6065 if (local_syms != NULL)
6066 {
6067 unsigned long r_symndx;
6068 Elf_Internal_Sym *sym;
6069 bfd *ibfd = sec->owner;
6070
6071 r_symndx = ELF64_R_SYM (r_info);
6072 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6073 return FALSE;
6074 }
6075
6076 if ((info->shared
6077 && (MUST_BE_DYN_RELOC (r_type)
6078 || (h != NULL
6079 && (!info->symbolic
6080 || h->root.type == bfd_link_hash_defweak
6081 || !h->def_regular))))
6082 || (ELIMINATE_COPY_RELOCS
6083 && !info->shared
6084 && h != NULL
6085 && (h->root.type == bfd_link_hash_defweak
6086 || !h->def_regular)))
6087 ;
6088 else
6089 return TRUE;
6090
6091 if (h != NULL)
6092 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6093 else if (sym_sec != NULL)
6094 pp = (struct ppc_dyn_relocs **) &elf_section_data (sym_sec)->local_dynrel;
6095 else
6096 pp = (struct ppc_dyn_relocs **) &elf_section_data (sec)->local_dynrel;
6097
6098 while ((p = *pp) != NULL)
6099 {
6100 if (p->sec == sec)
6101 {
6102 if (!MUST_BE_DYN_RELOC (r_type))
6103 p->pc_count -= 1;
6104 p->count -= 1;
6105 if (p->count == 0)
6106 *pp = p->next;
6107 return TRUE;
6108 }
6109 pp = &p->next;
6110 }
6111
6112 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6113 sec->owner, sec);
6114 bfd_set_error (bfd_error_bad_value);
6115 return FALSE;
6116 }
6117
6118 /* Remove unused Official Procedure Descriptor entries. Currently we
6119 only remove those associated with functions in discarded link-once
6120 sections, or weakly defined functions that have been overridden. It
6121 would be possible to remove many more entries for statically linked
6122 applications. */
6123
6124 bfd_boolean
6125 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6126 bfd_boolean non_overlapping)
6127 {
6128 bfd *ibfd;
6129 bfd_boolean some_edited = FALSE;
6130 asection *need_pad = NULL;
6131
6132 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6133 {
6134 asection *sec;
6135 Elf_Internal_Rela *relstart, *rel, *relend;
6136 Elf_Internal_Shdr *symtab_hdr;
6137 Elf_Internal_Sym *local_syms;
6138 struct elf_link_hash_entry **sym_hashes;
6139 bfd_vma offset;
6140 bfd_size_type amt;
6141 long *opd_adjust;
6142 bfd_boolean need_edit, add_aux_fields;
6143 bfd_size_type cnt_16b = 0;
6144
6145 sec = bfd_get_section_by_name (ibfd, ".opd");
6146 if (sec == NULL)
6147 continue;
6148
6149 amt = sec->size * sizeof (long) / 8;
6150 opd_adjust = get_opd_info (sec);
6151 if (opd_adjust == NULL)
6152 {
6153 /* check_relocs hasn't been called. Must be a ld -r link
6154 or --just-symbols object. */
6155 opd_adjust = bfd_zalloc (obfd, amt);
6156 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6157 }
6158 memset (opd_adjust, 0, amt);
6159
6160 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6161 continue;
6162
6163 if (sec->output_section == bfd_abs_section_ptr)
6164 continue;
6165
6166 /* Look through the section relocs. */
6167 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6168 continue;
6169
6170 local_syms = NULL;
6171 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6172 sym_hashes = elf_sym_hashes (ibfd);
6173
6174 /* Read the relocations. */
6175 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6176 info->keep_memory);
6177 if (relstart == NULL)
6178 return FALSE;
6179
6180 /* First run through the relocs to check they are sane, and to
6181 determine whether we need to edit this opd section. */
6182 need_edit = FALSE;
6183 need_pad = sec;
6184 offset = 0;
6185 relend = relstart + sec->reloc_count;
6186 for (rel = relstart; rel < relend; )
6187 {
6188 enum elf_ppc64_reloc_type r_type;
6189 unsigned long r_symndx;
6190 asection *sym_sec;
6191 struct elf_link_hash_entry *h;
6192 Elf_Internal_Sym *sym;
6193
6194 /* .opd contains a regular array of 16 or 24 byte entries. We're
6195 only interested in the reloc pointing to a function entry
6196 point. */
6197 if (rel->r_offset != offset
6198 || rel + 1 >= relend
6199 || (rel + 1)->r_offset != offset + 8)
6200 {
6201 /* If someone messes with .opd alignment then after a
6202 "ld -r" we might have padding in the middle of .opd.
6203 Also, there's nothing to prevent someone putting
6204 something silly in .opd with the assembler. No .opd
6205 optimization for them! */
6206 broken_opd:
6207 (*_bfd_error_handler)
6208 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6209 need_edit = FALSE;
6210 break;
6211 }
6212
6213 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6214 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6215 {
6216 (*_bfd_error_handler)
6217 (_("%B: unexpected reloc type %u in .opd section"),
6218 ibfd, r_type);
6219 need_edit = FALSE;
6220 break;
6221 }
6222
6223 r_symndx = ELF64_R_SYM (rel->r_info);
6224 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6225 r_symndx, ibfd))
6226 goto error_ret;
6227
6228 if (sym_sec == NULL || sym_sec->owner == NULL)
6229 {
6230 const char *sym_name;
6231 if (h != NULL)
6232 sym_name = h->root.root.string;
6233 else
6234 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6235 sym_sec);
6236
6237 (*_bfd_error_handler)
6238 (_("%B: undefined sym `%s' in .opd section"),
6239 ibfd, sym_name);
6240 need_edit = FALSE;
6241 break;
6242 }
6243
6244 /* opd entries are always for functions defined in the
6245 current input bfd. If the symbol isn't defined in the
6246 input bfd, then we won't be using the function in this
6247 bfd; It must be defined in a linkonce section in another
6248 bfd, or is weak. It's also possible that we are
6249 discarding the function due to a linker script /DISCARD/,
6250 which we test for via the output_section. */
6251 if (sym_sec->owner != ibfd
6252 || sym_sec->output_section == bfd_abs_section_ptr)
6253 need_edit = TRUE;
6254
6255 rel += 2;
6256 if (rel == relend
6257 || (rel + 1 == relend && rel->r_offset == offset + 16))
6258 {
6259 if (sec->size == offset + 24)
6260 {
6261 need_pad = NULL;
6262 break;
6263 }
6264 if (rel == relend && sec->size == offset + 16)
6265 {
6266 cnt_16b++;
6267 break;
6268 }
6269 goto broken_opd;
6270 }
6271
6272 if (rel->r_offset == offset + 24)
6273 offset += 24;
6274 else if (rel->r_offset != offset + 16)
6275 goto broken_opd;
6276 else if (rel + 1 < relend
6277 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6278 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6279 {
6280 offset += 16;
6281 cnt_16b++;
6282 }
6283 else if (rel + 2 < relend
6284 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6285 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6286 {
6287 offset += 24;
6288 rel += 1;
6289 }
6290 else
6291 goto broken_opd;
6292 }
6293
6294 add_aux_fields = non_overlapping && cnt_16b > 0;
6295
6296 if (need_edit || add_aux_fields)
6297 {
6298 Elf_Internal_Rela *write_rel;
6299 bfd_byte *rptr, *wptr;
6300 bfd_byte *new_contents = NULL;
6301 bfd_boolean skip;
6302 long opd_ent_size;
6303
6304 /* This seems a waste of time as input .opd sections are all
6305 zeros as generated by gcc, but I suppose there's no reason
6306 this will always be so. We might start putting something in
6307 the third word of .opd entries. */
6308 if ((sec->flags & SEC_IN_MEMORY) == 0)
6309 {
6310 bfd_byte *loc;
6311 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6312 {
6313 if (loc != NULL)
6314 free (loc);
6315 error_ret:
6316 if (local_syms != NULL
6317 && symtab_hdr->contents != (unsigned char *) local_syms)
6318 free (local_syms);
6319 if (elf_section_data (sec)->relocs != relstart)
6320 free (relstart);
6321 return FALSE;
6322 }
6323 sec->contents = loc;
6324 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6325 }
6326
6327 elf_section_data (sec)->relocs = relstart;
6328
6329 wptr = sec->contents;
6330 rptr = sec->contents;
6331 new_contents = sec->contents;
6332
6333 if (add_aux_fields)
6334 {
6335 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6336 if (new_contents == NULL)
6337 return FALSE;
6338 need_pad = FALSE;
6339 wptr = new_contents;
6340 }
6341
6342 write_rel = relstart;
6343 skip = FALSE;
6344 offset = 0;
6345 opd_ent_size = 0;
6346 for (rel = relstart; rel < relend; rel++)
6347 {
6348 unsigned long r_symndx;
6349 asection *sym_sec;
6350 struct elf_link_hash_entry *h;
6351 Elf_Internal_Sym *sym;
6352
6353 r_symndx = ELF64_R_SYM (rel->r_info);
6354 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6355 r_symndx, ibfd))
6356 goto error_ret;
6357
6358 if (rel->r_offset == offset)
6359 {
6360 struct ppc_link_hash_entry *fdh = NULL;
6361
6362 /* See if the .opd entry is full 24 byte or
6363 16 byte (with fd_aux entry overlapped with next
6364 fd_func). */
6365 opd_ent_size = 24;
6366 if ((rel + 2 == relend && sec->size == offset + 16)
6367 || (rel + 3 < relend
6368 && rel[2].r_offset == offset + 16
6369 && rel[3].r_offset == offset + 24
6370 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6371 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6372 opd_ent_size = 16;
6373
6374 if (h != NULL
6375 && h->root.root.string[0] == '.')
6376 {
6377 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6378 ppc_hash_table (info));
6379 if (fdh != NULL
6380 && fdh->elf.root.type != bfd_link_hash_defined
6381 && fdh->elf.root.type != bfd_link_hash_defweak)
6382 fdh = NULL;
6383 }
6384
6385 skip = (sym_sec->owner != ibfd
6386 || sym_sec->output_section == bfd_abs_section_ptr);
6387 if (skip)
6388 {
6389 if (fdh != NULL && sym_sec->owner == ibfd)
6390 {
6391 /* Arrange for the function descriptor sym
6392 to be dropped. */
6393 fdh->elf.root.u.def.value = 0;
6394 fdh->elf.root.u.def.section = sym_sec;
6395 }
6396 opd_adjust[rel->r_offset / 8] = -1;
6397 }
6398 else
6399 {
6400 /* We'll be keeping this opd entry. */
6401
6402 if (fdh != NULL)
6403 {
6404 /* Redefine the function descriptor symbol to
6405 this location in the opd section. It is
6406 necessary to update the value here rather
6407 than using an array of adjustments as we do
6408 for local symbols, because various places
6409 in the generic ELF code use the value
6410 stored in u.def.value. */
6411 fdh->elf.root.u.def.value = wptr - new_contents;
6412 fdh->adjust_done = 1;
6413 }
6414
6415 /* Local syms are a bit tricky. We could
6416 tweak them as they can be cached, but
6417 we'd need to look through the local syms
6418 for the function descriptor sym which we
6419 don't have at the moment. So keep an
6420 array of adjustments. */
6421 opd_adjust[rel->r_offset / 8]
6422 = (wptr - new_contents) - (rptr - sec->contents);
6423
6424 if (wptr != rptr)
6425 memcpy (wptr, rptr, opd_ent_size);
6426 wptr += opd_ent_size;
6427 if (add_aux_fields && opd_ent_size == 16)
6428 {
6429 memset (wptr, '\0', 8);
6430 wptr += 8;
6431 }
6432 }
6433 rptr += opd_ent_size;
6434 offset += opd_ent_size;
6435 }
6436
6437 if (skip)
6438 {
6439 if (!dec_dynrel_count (rel->r_info, sec, info,
6440 NULL, h, sym_sec))
6441 goto error_ret;
6442 }
6443 else
6444 {
6445 /* We need to adjust any reloc offsets to point to the
6446 new opd entries. While we're at it, we may as well
6447 remove redundant relocs. */
6448 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6449 if (write_rel != rel)
6450 memcpy (write_rel, rel, sizeof (*rel));
6451 ++write_rel;
6452 }
6453 }
6454
6455 sec->size = wptr - new_contents;
6456 sec->reloc_count = write_rel - relstart;
6457 if (add_aux_fields)
6458 {
6459 free (sec->contents);
6460 sec->contents = new_contents;
6461 }
6462
6463 /* Fudge the size too, as this is used later in
6464 elf_bfd_final_link if we are emitting relocs. */
6465 elf_section_data (sec)->rel_hdr.sh_size
6466 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6467 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6468 some_edited = TRUE;
6469 }
6470 else if (elf_section_data (sec)->relocs != relstart)
6471 free (relstart);
6472
6473 if (local_syms != NULL
6474 && symtab_hdr->contents != (unsigned char *) local_syms)
6475 {
6476 if (!info->keep_memory)
6477 free (local_syms);
6478 else
6479 symtab_hdr->contents = (unsigned char *) local_syms;
6480 }
6481 }
6482
6483 if (some_edited)
6484 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6485
6486 /* If we are doing a final link and the last .opd entry is just 16 byte
6487 long, add a 8 byte padding after it. */
6488 if (need_pad != NULL && !info->relocatable)
6489 {
6490 bfd_byte *p;
6491
6492 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6493 {
6494 BFD_ASSERT (need_pad->size > 0);
6495
6496 p = bfd_malloc (need_pad->size + 8);
6497 if (p == NULL)
6498 return FALSE;
6499
6500 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6501 p, 0, need_pad->size))
6502 return FALSE;
6503
6504 need_pad->contents = p;
6505 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6506 }
6507 else
6508 {
6509 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6510 if (p == NULL)
6511 return FALSE;
6512
6513 need_pad->contents = p;
6514 }
6515
6516 memset (need_pad->contents + need_pad->size, 0, 8);
6517 need_pad->size += 8;
6518 }
6519
6520 return TRUE;
6521 }
6522
6523 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6524
6525 asection *
6526 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6527 {
6528 struct ppc_link_hash_table *htab;
6529
6530 htab = ppc_hash_table (info);
6531 if (htab->tls_get_addr != NULL)
6532 {
6533 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6534
6535 while (h->elf.root.type == bfd_link_hash_indirect
6536 || h->elf.root.type == bfd_link_hash_warning)
6537 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6538
6539 htab->tls_get_addr = h;
6540
6541 if (htab->tls_get_addr_fd == NULL
6542 && h->oh != NULL
6543 && h->oh->is_func_descriptor
6544 && (h->oh->elf.root.type == bfd_link_hash_defined
6545 || h->oh->elf.root.type == bfd_link_hash_defweak))
6546 htab->tls_get_addr_fd = h->oh;
6547 }
6548
6549 if (htab->tls_get_addr_fd != NULL)
6550 {
6551 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6552
6553 while (h->elf.root.type == bfd_link_hash_indirect
6554 || h->elf.root.type == bfd_link_hash_warning)
6555 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6556
6557 htab->tls_get_addr_fd = h;
6558 }
6559
6560 return _bfd_elf_tls_setup (obfd, info);
6561 }
6562
6563 /* Run through all the TLS relocs looking for optimization
6564 opportunities. The linker has been hacked (see ppc64elf.em) to do
6565 a preliminary section layout so that we know the TLS segment
6566 offsets. We can't optimize earlier because some optimizations need
6567 to know the tp offset, and we need to optimize before allocating
6568 dynamic relocations. */
6569
6570 bfd_boolean
6571 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6572 {
6573 bfd *ibfd;
6574 asection *sec;
6575 struct ppc_link_hash_table *htab;
6576
6577 if (info->relocatable || info->shared)
6578 return TRUE;
6579
6580 htab = ppc_hash_table (info);
6581 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6582 {
6583 Elf_Internal_Sym *locsyms = NULL;
6584
6585 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6586 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6587 {
6588 Elf_Internal_Rela *relstart, *rel, *relend;
6589 int expecting_tls_get_addr;
6590
6591 /* Read the relocations. */
6592 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6593 info->keep_memory);
6594 if (relstart == NULL)
6595 return FALSE;
6596
6597 expecting_tls_get_addr = 0;
6598 relend = relstart + sec->reloc_count;
6599 for (rel = relstart; rel < relend; rel++)
6600 {
6601 enum elf_ppc64_reloc_type r_type;
6602 unsigned long r_symndx;
6603 struct elf_link_hash_entry *h;
6604 Elf_Internal_Sym *sym;
6605 asection *sym_sec;
6606 char *tls_mask;
6607 char tls_set, tls_clear, tls_type = 0;
6608 bfd_vma value;
6609 bfd_boolean ok_tprel, is_local;
6610
6611 r_symndx = ELF64_R_SYM (rel->r_info);
6612 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6613 r_symndx, ibfd))
6614 {
6615 err_free_rel:
6616 if (elf_section_data (sec)->relocs != relstart)
6617 free (relstart);
6618 if (locsyms != NULL
6619 && (elf_tdata (ibfd)->symtab_hdr.contents
6620 != (unsigned char *) locsyms))
6621 free (locsyms);
6622 return FALSE;
6623 }
6624
6625 if (h != NULL)
6626 {
6627 if (h->root.type != bfd_link_hash_defined
6628 && h->root.type != bfd_link_hash_defweak)
6629 continue;
6630 value = h->root.u.def.value;
6631 }
6632 else
6633 /* Symbols referenced by TLS relocs must be of type
6634 STT_TLS. So no need for .opd local sym adjust. */
6635 value = sym->st_value;
6636
6637 ok_tprel = FALSE;
6638 is_local = FALSE;
6639 if (h == NULL
6640 || !h->def_dynamic)
6641 {
6642 is_local = TRUE;
6643 value += sym_sec->output_offset;
6644 value += sym_sec->output_section->vma;
6645 value -= htab->elf.tls_sec->vma;
6646 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6647 < (bfd_vma) 1 << 32);
6648 }
6649
6650 r_type = ELF64_R_TYPE (rel->r_info);
6651 switch (r_type)
6652 {
6653 case R_PPC64_GOT_TLSLD16:
6654 case R_PPC64_GOT_TLSLD16_LO:
6655 case R_PPC64_GOT_TLSLD16_HI:
6656 case R_PPC64_GOT_TLSLD16_HA:
6657 /* These relocs should never be against a symbol
6658 defined in a shared lib. Leave them alone if
6659 that turns out to be the case. */
6660 ppc64_tlsld_got (ibfd)->refcount -= 1;
6661 if (!is_local)
6662 continue;
6663
6664 /* LD -> LE */
6665 tls_set = 0;
6666 tls_clear = TLS_LD;
6667 tls_type = TLS_TLS | TLS_LD;
6668 expecting_tls_get_addr = 1;
6669 break;
6670
6671 case R_PPC64_GOT_TLSGD16:
6672 case R_PPC64_GOT_TLSGD16_LO:
6673 case R_PPC64_GOT_TLSGD16_HI:
6674 case R_PPC64_GOT_TLSGD16_HA:
6675 if (ok_tprel)
6676 /* GD -> LE */
6677 tls_set = 0;
6678 else
6679 /* GD -> IE */
6680 tls_set = TLS_TLS | TLS_TPRELGD;
6681 tls_clear = TLS_GD;
6682 tls_type = TLS_TLS | TLS_GD;
6683 expecting_tls_get_addr = 1;
6684 break;
6685
6686 case R_PPC64_GOT_TPREL16_DS:
6687 case R_PPC64_GOT_TPREL16_LO_DS:
6688 case R_PPC64_GOT_TPREL16_HI:
6689 case R_PPC64_GOT_TPREL16_HA:
6690 expecting_tls_get_addr = 0;
6691 if (ok_tprel)
6692 {
6693 /* IE -> LE */
6694 tls_set = 0;
6695 tls_clear = TLS_TPREL;
6696 tls_type = TLS_TLS | TLS_TPREL;
6697 break;
6698 }
6699 else
6700 continue;
6701
6702 case R_PPC64_REL14:
6703 case R_PPC64_REL14_BRTAKEN:
6704 case R_PPC64_REL14_BRNTAKEN:
6705 case R_PPC64_REL24:
6706 if (h != NULL
6707 && (h == &htab->tls_get_addr->elf
6708 || h == &htab->tls_get_addr_fd->elf))
6709 {
6710 if (!expecting_tls_get_addr
6711 && rel != relstart
6712 && ((ELF64_R_TYPE (rel[-1].r_info)
6713 == R_PPC64_TOC16)
6714 || (ELF64_R_TYPE (rel[-1].r_info)
6715 == R_PPC64_TOC16_LO)))
6716 {
6717 /* Check for toc tls entries. */
6718 char *toc_tls;
6719 int retval;
6720
6721 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6722 rel - 1, ibfd);
6723 if (retval == 0)
6724 goto err_free_rel;
6725 if (toc_tls != NULL)
6726 expecting_tls_get_addr = retval > 1;
6727 }
6728
6729 if (expecting_tls_get_addr)
6730 {
6731 struct plt_entry *ent;
6732 for (ent = h->plt.plist; ent; ent = ent->next)
6733 if (ent->addend == 0)
6734 {
6735 if (ent->plt.refcount > 0)
6736 ent->plt.refcount -= 1;
6737 break;
6738 }
6739 }
6740 }
6741 expecting_tls_get_addr = 0;
6742 continue;
6743
6744 case R_PPC64_TPREL64:
6745 expecting_tls_get_addr = 0;
6746 if (ok_tprel)
6747 {
6748 /* IE -> LE */
6749 tls_set = TLS_EXPLICIT;
6750 tls_clear = TLS_TPREL;
6751 break;
6752 }
6753 else
6754 continue;
6755
6756 case R_PPC64_DTPMOD64:
6757 expecting_tls_get_addr = 0;
6758 if (rel + 1 < relend
6759 && (rel[1].r_info
6760 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6761 && rel[1].r_offset == rel->r_offset + 8)
6762 {
6763 if (ok_tprel)
6764 /* GD -> LE */
6765 tls_set = TLS_EXPLICIT | TLS_GD;
6766 else
6767 /* GD -> IE */
6768 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6769 tls_clear = TLS_GD;
6770 }
6771 else
6772 {
6773 if (!is_local)
6774 continue;
6775
6776 /* LD -> LE */
6777 tls_set = TLS_EXPLICIT;
6778 tls_clear = TLS_LD;
6779 }
6780 break;
6781
6782 default:
6783 expecting_tls_get_addr = 0;
6784 continue;
6785 }
6786
6787 if ((tls_set & TLS_EXPLICIT) == 0)
6788 {
6789 struct got_entry *ent;
6790
6791 /* Adjust got entry for this reloc. */
6792 if (h != NULL)
6793 ent = h->got.glist;
6794 else
6795 ent = elf_local_got_ents (ibfd)[r_symndx];
6796
6797 for (; ent != NULL; ent = ent->next)
6798 if (ent->addend == rel->r_addend
6799 && ent->owner == ibfd
6800 && ent->tls_type == tls_type)
6801 break;
6802 if (ent == NULL)
6803 abort ();
6804
6805 if (tls_set == 0)
6806 {
6807 /* We managed to get rid of a got entry. */
6808 if (ent->got.refcount > 0)
6809 ent->got.refcount -= 1;
6810 }
6811 }
6812 else
6813 {
6814 /* If we got rid of a DTPMOD/DTPREL reloc pair then
6815 we'll lose one or two dyn relocs. */
6816 if (!dec_dynrel_count (rel->r_info, sec, info,
6817 NULL, h, sym_sec))
6818 return FALSE;
6819
6820 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6821 {
6822 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
6823 NULL, h, sym_sec))
6824 return FALSE;
6825 }
6826 }
6827
6828 *tls_mask |= tls_set;
6829 *tls_mask &= ~tls_clear;
6830 }
6831
6832 if (elf_section_data (sec)->relocs != relstart)
6833 free (relstart);
6834 }
6835
6836 if (locsyms != NULL
6837 && (elf_tdata (ibfd)->symtab_hdr.contents
6838 != (unsigned char *) locsyms))
6839 {
6840 if (!info->keep_memory)
6841 free (locsyms);
6842 else
6843 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6844 }
6845 }
6846 return TRUE;
6847 }
6848
6849 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6850 the values of any global symbols in a toc section that has been
6851 edited. Globals in toc sections should be a rarity, so this function
6852 sets a flag if any are found in toc sections other than the one just
6853 edited, so that futher hash table traversals can be avoided. */
6854
6855 struct adjust_toc_info
6856 {
6857 asection *toc;
6858 unsigned long *skip;
6859 bfd_boolean global_toc_syms;
6860 };
6861
6862 static bfd_boolean
6863 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6864 {
6865 struct ppc_link_hash_entry *eh;
6866 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6867
6868 if (h->root.type == bfd_link_hash_indirect)
6869 return TRUE;
6870
6871 if (h->root.type == bfd_link_hash_warning)
6872 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6873
6874 if (h->root.type != bfd_link_hash_defined
6875 && h->root.type != bfd_link_hash_defweak)
6876 return TRUE;
6877
6878 eh = (struct ppc_link_hash_entry *) h;
6879 if (eh->adjust_done)
6880 return TRUE;
6881
6882 if (eh->elf.root.u.def.section == toc_inf->toc)
6883 {
6884 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6885 if (skip != (unsigned long) -1)
6886 eh->elf.root.u.def.value -= skip;
6887 else
6888 {
6889 (*_bfd_error_handler)
6890 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6891 eh->elf.root.u.def.section = &bfd_abs_section;
6892 eh->elf.root.u.def.value = 0;
6893 }
6894 eh->adjust_done = 1;
6895 }
6896 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6897 toc_inf->global_toc_syms = TRUE;
6898
6899 return TRUE;
6900 }
6901
6902 /* Examine all relocs referencing .toc sections in order to remove
6903 unused .toc entries. */
6904
6905 bfd_boolean
6906 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6907 {
6908 bfd *ibfd;
6909 struct adjust_toc_info toc_inf;
6910
6911 toc_inf.global_toc_syms = TRUE;
6912 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6913 {
6914 asection *toc, *sec;
6915 Elf_Internal_Shdr *symtab_hdr;
6916 Elf_Internal_Sym *local_syms;
6917 struct elf_link_hash_entry **sym_hashes;
6918 Elf_Internal_Rela *relstart, *rel;
6919 unsigned long *skip, *drop;
6920 unsigned char *used;
6921 unsigned char *keep, last, some_unused;
6922
6923 toc = bfd_get_section_by_name (ibfd, ".toc");
6924 if (toc == NULL
6925 || toc->size == 0
6926 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6927 || elf_discarded_section (toc))
6928 continue;
6929
6930 local_syms = NULL;
6931 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6932 sym_hashes = elf_sym_hashes (ibfd);
6933
6934 /* Look at sections dropped from the final link. */
6935 skip = NULL;
6936 relstart = NULL;
6937 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6938 {
6939 if (sec->reloc_count == 0
6940 || !elf_discarded_section (sec)
6941 || get_opd_info (sec)
6942 || (sec->flags & SEC_ALLOC) == 0
6943 || (sec->flags & SEC_DEBUGGING) != 0)
6944 continue;
6945
6946 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6947 if (relstart == NULL)
6948 goto error_ret;
6949
6950 /* Run through the relocs to see which toc entries might be
6951 unused. */
6952 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6953 {
6954 enum elf_ppc64_reloc_type r_type;
6955 unsigned long r_symndx;
6956 asection *sym_sec;
6957 struct elf_link_hash_entry *h;
6958 Elf_Internal_Sym *sym;
6959 bfd_vma val;
6960
6961 r_type = ELF64_R_TYPE (rel->r_info);
6962 switch (r_type)
6963 {
6964 default:
6965 continue;
6966
6967 case R_PPC64_TOC16:
6968 case R_PPC64_TOC16_LO:
6969 case R_PPC64_TOC16_HI:
6970 case R_PPC64_TOC16_HA:
6971 case R_PPC64_TOC16_DS:
6972 case R_PPC64_TOC16_LO_DS:
6973 break;
6974 }
6975
6976 r_symndx = ELF64_R_SYM (rel->r_info);
6977 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6978 r_symndx, ibfd))
6979 goto error_ret;
6980
6981 if (sym_sec != toc)
6982 continue;
6983
6984 if (h != NULL)
6985 val = h->root.u.def.value;
6986 else
6987 val = sym->st_value;
6988 val += rel->r_addend;
6989
6990 if (val >= toc->size)
6991 continue;
6992
6993 /* Anything in the toc ought to be aligned to 8 bytes.
6994 If not, don't mark as unused. */
6995 if (val & 7)
6996 continue;
6997
6998 if (skip == NULL)
6999 {
7000 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7001 if (skip == NULL)
7002 goto error_ret;
7003 }
7004
7005 skip[val >> 3] = 1;
7006 }
7007
7008 if (elf_section_data (sec)->relocs != relstart)
7009 free (relstart);
7010 }
7011
7012 if (skip == NULL)
7013 continue;
7014
7015 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7016 if (used == NULL)
7017 {
7018 error_ret:
7019 if (local_syms != NULL
7020 && symtab_hdr->contents != (unsigned char *) local_syms)
7021 free (local_syms);
7022 if (sec != NULL
7023 && relstart != NULL
7024 && elf_section_data (sec)->relocs != relstart)
7025 free (relstart);
7026 if (skip != NULL)
7027 free (skip);
7028 return FALSE;
7029 }
7030
7031 /* Now check all kept sections that might reference the toc. */
7032 for (sec = ibfd->sections;
7033 sec != NULL;
7034 /* Check the toc itself last. */
7035 sec = (sec == toc ? NULL
7036 : sec->next == toc && sec->next->next ? sec->next->next
7037 : sec->next == NULL ? toc
7038 : sec->next))
7039 {
7040 int repeat;
7041
7042 if (sec->reloc_count == 0
7043 || elf_discarded_section (sec)
7044 || get_opd_info (sec)
7045 || (sec->flags & SEC_ALLOC) == 0
7046 || (sec->flags & SEC_DEBUGGING) != 0)
7047 continue;
7048
7049 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7050 if (relstart == NULL)
7051 goto error_ret;
7052
7053 /* Mark toc entries referenced as used. */
7054 repeat = 0;
7055 do
7056 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7057 {
7058 enum elf_ppc64_reloc_type r_type;
7059 unsigned long r_symndx;
7060 asection *sym_sec;
7061 struct elf_link_hash_entry *h;
7062 Elf_Internal_Sym *sym;
7063 bfd_vma val;
7064
7065 r_type = ELF64_R_TYPE (rel->r_info);
7066 switch (r_type)
7067 {
7068 case R_PPC64_TOC16:
7069 case R_PPC64_TOC16_LO:
7070 case R_PPC64_TOC16_HI:
7071 case R_PPC64_TOC16_HA:
7072 case R_PPC64_TOC16_DS:
7073 case R_PPC64_TOC16_LO_DS:
7074 /* In case we're taking addresses of toc entries. */
7075 case R_PPC64_ADDR64:
7076 break;
7077
7078 default:
7079 continue;
7080 }
7081
7082 r_symndx = ELF64_R_SYM (rel->r_info);
7083 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7084 r_symndx, ibfd))
7085 {
7086 free (used);
7087 goto error_ret;
7088 }
7089
7090 if (sym_sec != toc)
7091 continue;
7092
7093 if (h != NULL)
7094 val = h->root.u.def.value;
7095 else
7096 val = sym->st_value;
7097 val += rel->r_addend;
7098
7099 if (val >= toc->size)
7100 continue;
7101
7102 /* For the toc section, we only mark as used if
7103 this entry itself isn't unused. */
7104 if (sec == toc
7105 && !used[val >> 3]
7106 && (used[rel->r_offset >> 3]
7107 || !skip[rel->r_offset >> 3]))
7108 /* Do all the relocs again, to catch reference
7109 chains. */
7110 repeat = 1;
7111
7112 used[val >> 3] = 1;
7113 }
7114 while (repeat);
7115 }
7116
7117 /* Merge the used and skip arrays. Assume that TOC
7118 doublewords not appearing as either used or unused belong
7119 to to an entry more than one doubleword in size. */
7120 for (drop = skip, keep = used, last = 0, some_unused = 0;
7121 drop < skip + (toc->size + 7) / 8;
7122 ++drop, ++keep)
7123 {
7124 if (*keep)
7125 {
7126 *drop = 0;
7127 last = 0;
7128 }
7129 else if (*drop)
7130 {
7131 some_unused = 1;
7132 last = 1;
7133 }
7134 else
7135 *drop = last;
7136 }
7137
7138 free (used);
7139
7140 if (some_unused)
7141 {
7142 bfd_byte *contents, *src;
7143 unsigned long off;
7144
7145 /* Shuffle the toc contents, and at the same time convert the
7146 skip array from booleans into offsets. */
7147 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7148 goto error_ret;
7149
7150 elf_section_data (toc)->this_hdr.contents = contents;
7151
7152 for (src = contents, off = 0, drop = skip;
7153 src < contents + toc->size;
7154 src += 8, ++drop)
7155 {
7156 if (*drop)
7157 {
7158 *drop = (unsigned long) -1;
7159 off += 8;
7160 }
7161 else if (off != 0)
7162 {
7163 *drop = off;
7164 memcpy (src - off, src, 8);
7165 }
7166 }
7167 toc->rawsize = toc->size;
7168 toc->size = src - contents - off;
7169
7170 if (toc->reloc_count != 0)
7171 {
7172 Elf_Internal_Rela *wrel;
7173 bfd_size_type sz;
7174
7175 /* Read toc relocs. */
7176 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7177 TRUE);
7178 if (relstart == NULL)
7179 goto error_ret;
7180
7181 /* Remove unused toc relocs, and adjust those we keep. */
7182 wrel = relstart;
7183 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7184 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7185 {
7186 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7187 wrel->r_info = rel->r_info;
7188 wrel->r_addend = rel->r_addend;
7189 ++wrel;
7190 }
7191 else if (!dec_dynrel_count (rel->r_info, toc, info,
7192 &local_syms, NULL, NULL))
7193 goto error_ret;
7194
7195 toc->reloc_count = wrel - relstart;
7196 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7197 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7198 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7199 }
7200
7201 /* Adjust addends for relocs against the toc section sym. */
7202 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7203 {
7204 if (sec->reloc_count == 0
7205 || elf_discarded_section (sec))
7206 continue;
7207
7208 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7209 TRUE);
7210 if (relstart == NULL)
7211 goto error_ret;
7212
7213 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7214 {
7215 enum elf_ppc64_reloc_type r_type;
7216 unsigned long r_symndx;
7217 asection *sym_sec;
7218 struct elf_link_hash_entry *h;
7219 Elf_Internal_Sym *sym;
7220
7221 r_type = ELF64_R_TYPE (rel->r_info);
7222 switch (r_type)
7223 {
7224 default:
7225 continue;
7226
7227 case R_PPC64_TOC16:
7228 case R_PPC64_TOC16_LO:
7229 case R_PPC64_TOC16_HI:
7230 case R_PPC64_TOC16_HA:
7231 case R_PPC64_TOC16_DS:
7232 case R_PPC64_TOC16_LO_DS:
7233 case R_PPC64_ADDR64:
7234 break;
7235 }
7236
7237 r_symndx = ELF64_R_SYM (rel->r_info);
7238 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7239 r_symndx, ibfd))
7240 goto error_ret;
7241
7242 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7243 continue;
7244
7245 rel->r_addend -= skip[rel->r_addend >> 3];
7246 }
7247 }
7248
7249 /* We shouldn't have local or global symbols defined in the TOC,
7250 but handle them anyway. */
7251 if (local_syms != NULL)
7252 {
7253 Elf_Internal_Sym *sym;
7254
7255 for (sym = local_syms;
7256 sym < local_syms + symtab_hdr->sh_info;
7257 ++sym)
7258 if (sym->st_shndx != SHN_UNDEF
7259 && (sym->st_shndx < SHN_LORESERVE
7260 || sym->st_shndx > SHN_HIRESERVE)
7261 && sym->st_value != 0
7262 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7263 {
7264 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7265 sym->st_value -= skip[sym->st_value >> 3];
7266 else
7267 {
7268 (*_bfd_error_handler)
7269 (_("%s defined in removed toc entry"),
7270 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7271 NULL));
7272 sym->st_value = 0;
7273 sym->st_shndx = SHN_ABS;
7274 }
7275 symtab_hdr->contents = (unsigned char *) local_syms;
7276 }
7277 }
7278
7279 /* Finally, adjust any global syms defined in the toc. */
7280 if (toc_inf.global_toc_syms)
7281 {
7282 toc_inf.toc = toc;
7283 toc_inf.skip = skip;
7284 toc_inf.global_toc_syms = FALSE;
7285 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7286 &toc_inf);
7287 }
7288 }
7289
7290 if (local_syms != NULL
7291 && symtab_hdr->contents != (unsigned char *) local_syms)
7292 {
7293 if (!info->keep_memory)
7294 free (local_syms);
7295 else
7296 symtab_hdr->contents = (unsigned char *) local_syms;
7297 }
7298 free (skip);
7299 }
7300
7301 return TRUE;
7302 }
7303
7304 /* Allocate space in .plt, .got and associated reloc sections for
7305 dynamic relocs. */
7306
7307 static bfd_boolean
7308 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7309 {
7310 struct bfd_link_info *info;
7311 struct ppc_link_hash_table *htab;
7312 asection *s;
7313 struct ppc_link_hash_entry *eh;
7314 struct ppc_dyn_relocs *p;
7315 struct got_entry *gent;
7316
7317 if (h->root.type == bfd_link_hash_indirect)
7318 return TRUE;
7319
7320 if (h->root.type == bfd_link_hash_warning)
7321 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7322
7323 info = (struct bfd_link_info *) inf;
7324 htab = ppc_hash_table (info);
7325
7326 if (htab->elf.dynamic_sections_created
7327 && h->dynindx != -1
7328 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7329 {
7330 struct plt_entry *pent;
7331 bfd_boolean doneone = FALSE;
7332 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7333 if (pent->plt.refcount > 0)
7334 {
7335 /* If this is the first .plt entry, make room for the special
7336 first entry. */
7337 s = htab->plt;
7338 if (s->size == 0)
7339 s->size += PLT_INITIAL_ENTRY_SIZE;
7340
7341 pent->plt.offset = s->size;
7342
7343 /* Make room for this entry. */
7344 s->size += PLT_ENTRY_SIZE;
7345
7346 /* Make room for the .glink code. */
7347 s = htab->glink;
7348 if (s->size == 0)
7349 s->size += GLINK_CALL_STUB_SIZE;
7350 /* We need bigger stubs past index 32767. */
7351 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7352 s->size += 4;
7353 s->size += 2*4;
7354
7355 /* We also need to make an entry in the .rela.plt section. */
7356 s = htab->relplt;
7357 s->size += sizeof (Elf64_External_Rela);
7358 doneone = TRUE;
7359 }
7360 else
7361 pent->plt.offset = (bfd_vma) -1;
7362 if (!doneone)
7363 {
7364 h->plt.plist = NULL;
7365 h->needs_plt = 0;
7366 }
7367 }
7368 else
7369 {
7370 h->plt.plist = NULL;
7371 h->needs_plt = 0;
7372 }
7373
7374 eh = (struct ppc_link_hash_entry *) h;
7375 /* Run through the TLS GD got entries first if we're changing them
7376 to TPREL. */
7377 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7378 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7379 if (gent->got.refcount > 0
7380 && (gent->tls_type & TLS_GD) != 0)
7381 {
7382 /* This was a GD entry that has been converted to TPREL. If
7383 there happens to be a TPREL entry we can use that one. */
7384 struct got_entry *ent;
7385 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7386 if (ent->got.refcount > 0
7387 && (ent->tls_type & TLS_TPREL) != 0
7388 && ent->addend == gent->addend
7389 && ent->owner == gent->owner)
7390 {
7391 gent->got.refcount = 0;
7392 break;
7393 }
7394
7395 /* If not, then we'll be using our own TPREL entry. */
7396 if (gent->got.refcount != 0)
7397 gent->tls_type = TLS_TLS | TLS_TPREL;
7398 }
7399
7400 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7401 if (gent->got.refcount > 0)
7402 {
7403 bfd_boolean dyn;
7404
7405 /* Make sure this symbol is output as a dynamic symbol.
7406 Undefined weak syms won't yet be marked as dynamic,
7407 nor will all TLS symbols. */
7408 if (h->dynindx == -1
7409 && !h->forced_local)
7410 {
7411 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7412 return FALSE;
7413 }
7414
7415 if ((gent->tls_type & TLS_LD) != 0
7416 && !h->def_dynamic)
7417 {
7418 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7419 continue;
7420 }
7421
7422 s = ppc64_elf_tdata (gent->owner)->got;
7423 gent->got.offset = s->size;
7424 s->size
7425 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7426 dyn = htab->elf.dynamic_sections_created;
7427 if ((info->shared
7428 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7429 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7430 || h->root.type != bfd_link_hash_undefweak))
7431 ppc64_elf_tdata (gent->owner)->relgot->size
7432 += (gent->tls_type & eh->tls_mask & TLS_GD
7433 ? 2 * sizeof (Elf64_External_Rela)
7434 : sizeof (Elf64_External_Rela));
7435 }
7436 else
7437 gent->got.offset = (bfd_vma) -1;
7438
7439 if (eh->dyn_relocs == NULL)
7440 return TRUE;
7441
7442 /* In the shared -Bsymbolic case, discard space allocated for
7443 dynamic pc-relative relocs against symbols which turn out to be
7444 defined in regular objects. For the normal shared case, discard
7445 space for relocs that have become local due to symbol visibility
7446 changes. */
7447
7448 if (info->shared)
7449 {
7450 /* Relocs that use pc_count are those that appear on a call insn,
7451 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7452 generated via assembly. We want calls to protected symbols to
7453 resolve directly to the function rather than going via the plt.
7454 If people want function pointer comparisons to work as expected
7455 then they should avoid writing weird assembly. */
7456 if (SYMBOL_CALLS_LOCAL (info, h))
7457 {
7458 struct ppc_dyn_relocs **pp;
7459
7460 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7461 {
7462 p->count -= p->pc_count;
7463 p->pc_count = 0;
7464 if (p->count == 0)
7465 *pp = p->next;
7466 else
7467 pp = &p->next;
7468 }
7469 }
7470
7471 /* Also discard relocs on undefined weak syms with non-default
7472 visibility. */
7473 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7474 && h->root.type == bfd_link_hash_undefweak)
7475 eh->dyn_relocs = NULL;
7476 }
7477 else if (ELIMINATE_COPY_RELOCS)
7478 {
7479 /* For the non-shared case, discard space for relocs against
7480 symbols which turn out to need copy relocs or are not
7481 dynamic. */
7482
7483 if (!h->non_got_ref
7484 && h->def_dynamic
7485 && !h->def_regular)
7486 {
7487 /* Make sure this symbol is output as a dynamic symbol.
7488 Undefined weak syms won't yet be marked as dynamic. */
7489 if (h->dynindx == -1
7490 && !h->forced_local)
7491 {
7492 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7493 return FALSE;
7494 }
7495
7496 /* If that succeeded, we know we'll be keeping all the
7497 relocs. */
7498 if (h->dynindx != -1)
7499 goto keep;
7500 }
7501
7502 eh->dyn_relocs = NULL;
7503
7504 keep: ;
7505 }
7506
7507 /* Finally, allocate space. */
7508 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7509 {
7510 asection *sreloc = elf_section_data (p->sec)->sreloc;
7511 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7512 }
7513
7514 return TRUE;
7515 }
7516
7517 /* Find any dynamic relocs that apply to read-only sections. */
7518
7519 static bfd_boolean
7520 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7521 {
7522 struct ppc_link_hash_entry *eh;
7523 struct ppc_dyn_relocs *p;
7524
7525 if (h->root.type == bfd_link_hash_warning)
7526 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7527
7528 eh = (struct ppc_link_hash_entry *) h;
7529 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7530 {
7531 asection *s = p->sec->output_section;
7532
7533 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7534 {
7535 struct bfd_link_info *info = inf;
7536
7537 info->flags |= DF_TEXTREL;
7538
7539 /* Not an error, just cut short the traversal. */
7540 return FALSE;
7541 }
7542 }
7543 return TRUE;
7544 }
7545
7546 /* Set the sizes of the dynamic sections. */
7547
7548 static bfd_boolean
7549 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7550 struct bfd_link_info *info)
7551 {
7552 struct ppc_link_hash_table *htab;
7553 bfd *dynobj;
7554 asection *s;
7555 bfd_boolean relocs;
7556 bfd *ibfd;
7557
7558 htab = ppc_hash_table (info);
7559 dynobj = htab->elf.dynobj;
7560 if (dynobj == NULL)
7561 abort ();
7562
7563 if (htab->elf.dynamic_sections_created)
7564 {
7565 /* Set the contents of the .interp section to the interpreter. */
7566 if (info->executable)
7567 {
7568 s = bfd_get_section_by_name (dynobj, ".interp");
7569 if (s == NULL)
7570 abort ();
7571 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7572 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7573 }
7574 }
7575
7576 /* Set up .got offsets for local syms, and space for local dynamic
7577 relocs. */
7578 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7579 {
7580 struct got_entry **lgot_ents;
7581 struct got_entry **end_lgot_ents;
7582 char *lgot_masks;
7583 bfd_size_type locsymcount;
7584 Elf_Internal_Shdr *symtab_hdr;
7585 asection *srel;
7586
7587 if (!is_ppc64_elf_target (ibfd->xvec))
7588 continue;
7589
7590 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7591 {
7592 s = ppc64_elf_tdata (ibfd)->got;
7593 ppc64_tlsld_got (ibfd)->offset = s->size;
7594 s->size += 16;
7595 if (info->shared)
7596 {
7597 srel = ppc64_elf_tdata (ibfd)->relgot;
7598 srel->size += sizeof (Elf64_External_Rela);
7599 }
7600 }
7601 else
7602 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7603
7604 for (s = ibfd->sections; s != NULL; s = s->next)
7605 {
7606 struct ppc_dyn_relocs *p;
7607
7608 for (p = *((struct ppc_dyn_relocs **)
7609 &elf_section_data (s)->local_dynrel);
7610 p != NULL;
7611 p = p->next)
7612 {
7613 if (!bfd_is_abs_section (p->sec)
7614 && bfd_is_abs_section (p->sec->output_section))
7615 {
7616 /* Input section has been discarded, either because
7617 it is a copy of a linkonce section or due to
7618 linker script /DISCARD/, so we'll be discarding
7619 the relocs too. */
7620 }
7621 else if (p->count != 0)
7622 {
7623 srel = elf_section_data (p->sec)->sreloc;
7624 srel->size += p->count * sizeof (Elf64_External_Rela);
7625 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7626 info->flags |= DF_TEXTREL;
7627 }
7628 }
7629 }
7630
7631 lgot_ents = elf_local_got_ents (ibfd);
7632 if (!lgot_ents)
7633 continue;
7634
7635 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7636 locsymcount = symtab_hdr->sh_info;
7637 end_lgot_ents = lgot_ents + locsymcount;
7638 lgot_masks = (char *) end_lgot_ents;
7639 s = ppc64_elf_tdata (ibfd)->got;
7640 srel = ppc64_elf_tdata (ibfd)->relgot;
7641 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7642 {
7643 struct got_entry *ent;
7644
7645 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7646 if (ent->got.refcount > 0)
7647 {
7648 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7649 {
7650 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7651 {
7652 ppc64_tlsld_got (ibfd)->offset = s->size;
7653 s->size += 16;
7654 if (info->shared)
7655 srel->size += sizeof (Elf64_External_Rela);
7656 }
7657 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7658 }
7659 else
7660 {
7661 ent->got.offset = s->size;
7662 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7663 {
7664 s->size += 16;
7665 if (info->shared)
7666 srel->size += 2 * sizeof (Elf64_External_Rela);
7667 }
7668 else
7669 {
7670 s->size += 8;
7671 if (info->shared)
7672 srel->size += sizeof (Elf64_External_Rela);
7673 }
7674 }
7675 }
7676 else
7677 ent->got.offset = (bfd_vma) -1;
7678 }
7679 }
7680
7681 /* Allocate global sym .plt and .got entries, and space for global
7682 sym dynamic relocs. */
7683 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7684
7685 /* We now have determined the sizes of the various dynamic sections.
7686 Allocate memory for them. */
7687 relocs = FALSE;
7688 for (s = dynobj->sections; s != NULL; s = s->next)
7689 {
7690 if ((s->flags & SEC_LINKER_CREATED) == 0)
7691 continue;
7692
7693 if (s == htab->brlt || s == htab->relbrlt)
7694 /* These haven't been allocated yet; don't strip. */
7695 continue;
7696 else if (s == htab->got
7697 || s == htab->plt
7698 || s == htab->glink)
7699 {
7700 /* Strip this section if we don't need it; see the
7701 comment below. */
7702 }
7703 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7704 {
7705 if (s->size == 0)
7706 {
7707 /* If we don't need this section, strip it from the
7708 output file. This is mostly to handle .rela.bss and
7709 .rela.plt. We must create both sections in
7710 create_dynamic_sections, because they must be created
7711 before the linker maps input sections to output
7712 sections. The linker does that before
7713 adjust_dynamic_symbol is called, and it is that
7714 function which decides whether anything needs to go
7715 into these sections. */
7716 }
7717 else
7718 {
7719 if (s != htab->relplt)
7720 relocs = TRUE;
7721
7722 /* We use the reloc_count field as a counter if we need
7723 to copy relocs into the output file. */
7724 s->reloc_count = 0;
7725 }
7726 }
7727 else
7728 {
7729 /* It's not one of our sections, so don't allocate space. */
7730 continue;
7731 }
7732
7733 if (s->size == 0)
7734 {
7735 s->flags |= SEC_EXCLUDE;
7736 continue;
7737 }
7738
7739 /* .plt is in the bss section. We don't initialise it. */
7740 if (s == htab->plt)
7741 continue;
7742
7743 /* Allocate memory for the section contents. We use bfd_zalloc
7744 here in case unused entries are not reclaimed before the
7745 section's contents are written out. This should not happen,
7746 but this way if it does we get a R_PPC64_NONE reloc in .rela
7747 sections instead of garbage.
7748 We also rely on the section contents being zero when writing
7749 the GOT. */
7750 s->contents = bfd_zalloc (dynobj, s->size);
7751 if (s->contents == NULL)
7752 return FALSE;
7753 }
7754
7755 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7756 {
7757 if (!is_ppc64_elf_target (ibfd->xvec))
7758 continue;
7759
7760 s = ppc64_elf_tdata (ibfd)->got;
7761 if (s != NULL && s != htab->got)
7762 {
7763 if (s->size == 0)
7764 s->flags |= SEC_EXCLUDE;
7765 else
7766 {
7767 s->contents = bfd_zalloc (ibfd, s->size);
7768 if (s->contents == NULL)
7769 return FALSE;
7770 }
7771 }
7772 s = ppc64_elf_tdata (ibfd)->relgot;
7773 if (s != NULL)
7774 {
7775 if (s->size == 0)
7776 s->flags |= SEC_EXCLUDE;
7777 else
7778 {
7779 s->contents = bfd_zalloc (ibfd, s->size);
7780 if (s->contents == NULL)
7781 return FALSE;
7782 relocs = TRUE;
7783 s->reloc_count = 0;
7784 }
7785 }
7786 }
7787
7788 if (htab->elf.dynamic_sections_created)
7789 {
7790 /* Add some entries to the .dynamic section. We fill in the
7791 values later, in ppc64_elf_finish_dynamic_sections, but we
7792 must add the entries now so that we get the correct size for
7793 the .dynamic section. The DT_DEBUG entry is filled in by the
7794 dynamic linker and used by the debugger. */
7795 #define add_dynamic_entry(TAG, VAL) \
7796 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7797
7798 if (info->executable)
7799 {
7800 if (!add_dynamic_entry (DT_DEBUG, 0))
7801 return FALSE;
7802 }
7803
7804 if (htab->plt != NULL && htab->plt->size != 0)
7805 {
7806 if (!add_dynamic_entry (DT_PLTGOT, 0)
7807 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7808 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7809 || !add_dynamic_entry (DT_JMPREL, 0)
7810 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7811 return FALSE;
7812 }
7813
7814 if (NO_OPD_RELOCS)
7815 {
7816 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7817 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7818 return FALSE;
7819 }
7820
7821 if (relocs)
7822 {
7823 if (!add_dynamic_entry (DT_RELA, 0)
7824 || !add_dynamic_entry (DT_RELASZ, 0)
7825 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7826 return FALSE;
7827
7828 /* If any dynamic relocs apply to a read-only section,
7829 then we need a DT_TEXTREL entry. */
7830 if ((info->flags & DF_TEXTREL) == 0)
7831 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7832
7833 if ((info->flags & DF_TEXTREL) != 0)
7834 {
7835 if (!add_dynamic_entry (DT_TEXTREL, 0))
7836 return FALSE;
7837 }
7838 }
7839 }
7840 #undef add_dynamic_entry
7841
7842 return TRUE;
7843 }
7844
7845 /* Determine the type of stub needed, if any, for a call. */
7846
7847 static inline enum ppc_stub_type
7848 ppc_type_of_stub (asection *input_sec,
7849 const Elf_Internal_Rela *rel,
7850 struct ppc_link_hash_entry **hash,
7851 bfd_vma destination)
7852 {
7853 struct ppc_link_hash_entry *h = *hash;
7854 bfd_vma location;
7855 bfd_vma branch_offset;
7856 bfd_vma max_branch_offset;
7857 enum elf_ppc64_reloc_type r_type;
7858
7859 if (h != NULL)
7860 {
7861 if (h->oh != NULL
7862 && h->oh->is_func_descriptor)
7863 h = h->oh;
7864
7865 if (h->elf.dynindx != -1)
7866 {
7867 struct plt_entry *ent;
7868
7869 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7870 if (ent->addend == rel->r_addend
7871 && ent->plt.offset != (bfd_vma) -1)
7872 {
7873 *hash = h;
7874 return ppc_stub_plt_call;
7875 }
7876 }
7877
7878 if (!(h->elf.root.type == bfd_link_hash_defined
7879 || h->elf.root.type == bfd_link_hash_defweak)
7880 || h->elf.root.u.def.section->output_section == NULL)
7881 return ppc_stub_none;
7882 }
7883
7884 /* Determine where the call point is. */
7885 location = (input_sec->output_offset
7886 + input_sec->output_section->vma
7887 + rel->r_offset);
7888
7889 branch_offset = destination - location;
7890 r_type = ELF64_R_TYPE (rel->r_info);
7891
7892 /* Determine if a long branch stub is needed. */
7893 max_branch_offset = 1 << 25;
7894 if (r_type != R_PPC64_REL24)
7895 max_branch_offset = 1 << 15;
7896
7897 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7898 /* We need a stub. Figure out whether a long_branch or plt_branch
7899 is needed later. */
7900 return ppc_stub_long_branch;
7901
7902 return ppc_stub_none;
7903 }
7904
7905 /* Build a .plt call stub. */
7906
7907 static inline bfd_byte *
7908 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7909 {
7910 #define PPC_LO(v) ((v) & 0xffff)
7911 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7912 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7913
7914 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7915 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7916 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7917 if (PPC_HA (offset + 8) != PPC_HA (offset))
7918 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7919 offset += 8;
7920 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7921 if (PPC_HA (offset + 8) != PPC_HA (offset))
7922 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7923 offset += 8;
7924 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7925 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7926 bfd_put_32 (obfd, BCTR, p), p += 4;
7927 return p;
7928 }
7929
7930 static bfd_boolean
7931 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7932 {
7933 struct ppc_stub_hash_entry *stub_entry;
7934 struct ppc_branch_hash_entry *br_entry;
7935 struct bfd_link_info *info;
7936 struct ppc_link_hash_table *htab;
7937 bfd_byte *loc;
7938 bfd_byte *p;
7939 unsigned int indx;
7940 struct plt_entry *ent;
7941 bfd_vma dest, off;
7942 int size;
7943
7944 /* Massage our args to the form they really have. */
7945 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7946 info = in_arg;
7947
7948 htab = ppc_hash_table (info);
7949
7950 /* Make a note of the offset within the stubs for this entry. */
7951 stub_entry->stub_offset = stub_entry->stub_sec->size;
7952 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7953
7954 htab->stub_count[stub_entry->stub_type - 1] += 1;
7955 switch (stub_entry->stub_type)
7956 {
7957 case ppc_stub_long_branch:
7958 case ppc_stub_long_branch_r2off:
7959 /* Branches are relative. This is where we are going to. */
7960 off = dest = (stub_entry->target_value
7961 + stub_entry->target_section->output_offset
7962 + stub_entry->target_section->output_section->vma);
7963
7964 /* And this is where we are coming from. */
7965 off -= (stub_entry->stub_offset
7966 + stub_entry->stub_sec->output_offset
7967 + stub_entry->stub_sec->output_section->vma);
7968
7969 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7970 size = 4;
7971 else
7972 {
7973 bfd_vma r2off;
7974
7975 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7976 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7977 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7978 loc += 4;
7979 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7980 loc += 4;
7981 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7982 loc += 4;
7983 off -= 12;
7984 size = 16;
7985 }
7986 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7987
7988 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7989
7990 if (info->emitrelocations)
7991 {
7992 Elf_Internal_Rela *relocs, *r;
7993 struct bfd_elf_section_data *elfsec_data;
7994
7995 elfsec_data = elf_section_data (stub_entry->stub_sec);
7996 relocs = elfsec_data->relocs;
7997 if (relocs == NULL)
7998 {
7999 bfd_size_type relsize;
8000 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8001 relocs = bfd_alloc (htab->stub_bfd, relsize);
8002 if (relocs == NULL)
8003 return FALSE;
8004 elfsec_data->relocs = relocs;
8005 elfsec_data->rel_hdr.sh_size = relsize;
8006 elfsec_data->rel_hdr.sh_entsize = 24;
8007 stub_entry->stub_sec->reloc_count = 0;
8008 }
8009 r = relocs + stub_entry->stub_sec->reloc_count;
8010 stub_entry->stub_sec->reloc_count += 1;
8011 r->r_offset = loc - stub_entry->stub_sec->contents;
8012 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8013 r->r_addend = dest;
8014 if (stub_entry->h != NULL)
8015 {
8016 struct elf_link_hash_entry **hashes;
8017 unsigned long symndx;
8018 struct ppc_link_hash_entry *h;
8019
8020 hashes = elf_sym_hashes (htab->stub_bfd);
8021 if (hashes == NULL)
8022 {
8023 bfd_size_type hsize;
8024
8025 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8026 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8027 if (hashes == NULL)
8028 return FALSE;
8029 elf_sym_hashes (htab->stub_bfd) = hashes;
8030 htab->stub_globals = 1;
8031 }
8032 symndx = htab->stub_globals++;
8033 h = stub_entry->h;
8034 hashes[symndx] = &h->elf;
8035 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8036 if (h->oh != NULL && h->oh->is_func)
8037 h = h->oh;
8038 if (h->elf.root.u.def.section != stub_entry->target_section)
8039 /* H is an opd symbol. The addend must be zero. */
8040 r->r_addend = 0;
8041 else
8042 {
8043 off = (h->elf.root.u.def.value
8044 + h->elf.root.u.def.section->output_offset
8045 + h->elf.root.u.def.section->output_section->vma);
8046 r->r_addend -= off;
8047 }
8048 }
8049 }
8050 break;
8051
8052 case ppc_stub_plt_branch:
8053 case ppc_stub_plt_branch_r2off:
8054 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8055 stub_entry->root.string + 9,
8056 FALSE, FALSE);
8057 if (br_entry == NULL)
8058 {
8059 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8060 stub_entry->root.string + 9);
8061 htab->stub_error = TRUE;
8062 return FALSE;
8063 }
8064
8065 off = (stub_entry->target_value
8066 + stub_entry->target_section->output_offset
8067 + stub_entry->target_section->output_section->vma);
8068
8069 bfd_put_64 (htab->brlt->owner, off,
8070 htab->brlt->contents + br_entry->offset);
8071
8072 if (htab->relbrlt != NULL)
8073 {
8074 /* Create a reloc for the branch lookup table entry. */
8075 Elf_Internal_Rela rela;
8076 bfd_byte *rl;
8077
8078 rela.r_offset = (br_entry->offset
8079 + htab->brlt->output_offset
8080 + htab->brlt->output_section->vma);
8081 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8082 rela.r_addend = off;
8083
8084 rl = htab->relbrlt->contents;
8085 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8086 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8087 }
8088
8089 off = (br_entry->offset
8090 + htab->brlt->output_offset
8091 + htab->brlt->output_section->vma
8092 - elf_gp (htab->brlt->output_section->owner)
8093 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8094
8095 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8096 {
8097 (*_bfd_error_handler)
8098 (_("linkage table error against `%s'"),
8099 stub_entry->root.string);
8100 bfd_set_error (bfd_error_bad_value);
8101 htab->stub_error = TRUE;
8102 return FALSE;
8103 }
8104
8105 indx = off;
8106 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8107 {
8108 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8109 loc += 4;
8110 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8111 size = 16;
8112 }
8113 else
8114 {
8115 bfd_vma r2off;
8116
8117 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8118 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8119 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8120 loc += 4;
8121 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8122 loc += 4;
8123 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8124 loc += 4;
8125 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8126 loc += 4;
8127 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8128 size = 28;
8129 }
8130 loc += 4;
8131 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8132 loc += 4;
8133 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8134 break;
8135
8136 case ppc_stub_plt_call:
8137 /* Do the best we can for shared libraries built without
8138 exporting ".foo" for each "foo". This can happen when symbol
8139 versioning scripts strip all bar a subset of symbols. */
8140 if (stub_entry->h->oh != NULL
8141 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8142 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8143 {
8144 /* Point the symbol at the stub. There may be multiple stubs,
8145 we don't really care; The main thing is to make this sym
8146 defined somewhere. Maybe defining the symbol in the stub
8147 section is a silly idea. If we didn't do this, htab->top_id
8148 could disappear. */
8149 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8150 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8151 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8152 }
8153
8154 /* Now build the stub. */
8155 off = (bfd_vma) -1;
8156 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8157 if (ent->addend == stub_entry->addend)
8158 {
8159 off = ent->plt.offset;
8160 break;
8161 }
8162 if (off >= (bfd_vma) -2)
8163 abort ();
8164
8165 off &= ~ (bfd_vma) 1;
8166 off += (htab->plt->output_offset
8167 + htab->plt->output_section->vma
8168 - elf_gp (htab->plt->output_section->owner)
8169 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8170
8171 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8172 {
8173 (*_bfd_error_handler)
8174 (_("linkage table error against `%s'"),
8175 stub_entry->h->elf.root.root.string);
8176 bfd_set_error (bfd_error_bad_value);
8177 htab->stub_error = TRUE;
8178 return FALSE;
8179 }
8180
8181 p = build_plt_stub (htab->stub_bfd, loc, off);
8182 size = p - loc;
8183 break;
8184
8185 default:
8186 BFD_FAIL ();
8187 return FALSE;
8188 }
8189
8190 stub_entry->stub_sec->size += size;
8191
8192 if (htab->emit_stub_syms)
8193 {
8194 struct elf_link_hash_entry *h;
8195 size_t len1, len2;
8196 char *name;
8197 const char *const stub_str[] = { "long_branch",
8198 "long_branch_r2off",
8199 "plt_branch",
8200 "plt_branch_r2off",
8201 "plt_call" };
8202
8203 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8204 len2 = strlen (stub_entry->root.string);
8205 name = bfd_malloc (len1 + len2 + 2);
8206 if (name == NULL)
8207 return FALSE;
8208 memcpy (name, stub_entry->root.string, 9);
8209 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8210 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8211 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8212 if (h == NULL)
8213 return FALSE;
8214 if (h->root.type == bfd_link_hash_new)
8215 {
8216 h->root.type = bfd_link_hash_defined;
8217 h->root.u.def.section = stub_entry->stub_sec;
8218 h->root.u.def.value = stub_entry->stub_offset;
8219 h->ref_regular = 1;
8220 h->def_regular = 1;
8221 h->ref_regular_nonweak = 1;
8222 h->forced_local = 1;
8223 h->non_elf = 0;
8224 }
8225 }
8226
8227 return TRUE;
8228 }
8229
8230 /* As above, but don't actually build the stub. Just bump offset so
8231 we know stub section sizes, and select plt_branch stubs where
8232 long_branch stubs won't do. */
8233
8234 static bfd_boolean
8235 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8236 {
8237 struct ppc_stub_hash_entry *stub_entry;
8238 struct bfd_link_info *info;
8239 struct ppc_link_hash_table *htab;
8240 bfd_vma off;
8241 int size;
8242
8243 /* Massage our args to the form they really have. */
8244 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8245 info = in_arg;
8246
8247 htab = ppc_hash_table (info);
8248
8249 if (stub_entry->stub_type == ppc_stub_plt_call)
8250 {
8251 struct plt_entry *ent;
8252 off = (bfd_vma) -1;
8253 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8254 if (ent->addend == stub_entry->addend)
8255 {
8256 off = ent->plt.offset & ~(bfd_vma) 1;
8257 break;
8258 }
8259 if (off >= (bfd_vma) -2)
8260 abort ();
8261 off += (htab->plt->output_offset
8262 + htab->plt->output_section->vma
8263 - elf_gp (htab->plt->output_section->owner)
8264 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8265
8266 size = PLT_CALL_STUB_SIZE;
8267 if (PPC_HA (off + 16) != PPC_HA (off))
8268 size += 4;
8269 }
8270 else
8271 {
8272 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8273 variants. */
8274 off = (stub_entry->target_value
8275 + stub_entry->target_section->output_offset
8276 + stub_entry->target_section->output_section->vma);
8277 off -= (stub_entry->stub_sec->size
8278 + stub_entry->stub_sec->output_offset
8279 + stub_entry->stub_sec->output_section->vma);
8280
8281 /* Reset the stub type from the plt variant in case we now
8282 can reach with a shorter stub. */
8283 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8284 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8285
8286 size = 4;
8287 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8288 {
8289 off -= 12;
8290 size = 16;
8291 }
8292
8293 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8294 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8295 {
8296 struct ppc_branch_hash_entry *br_entry;
8297
8298 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8299 stub_entry->root.string + 9,
8300 TRUE, FALSE);
8301 if (br_entry == NULL)
8302 {
8303 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8304 stub_entry->root.string + 9);
8305 htab->stub_error = TRUE;
8306 return FALSE;
8307 }
8308
8309 if (br_entry->iter != htab->stub_iteration)
8310 {
8311 br_entry->iter = htab->stub_iteration;
8312 br_entry->offset = htab->brlt->size;
8313 htab->brlt->size += 8;
8314
8315 if (htab->relbrlt != NULL)
8316 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8317 }
8318
8319 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8320 size = 16;
8321 if (stub_entry->stub_type != ppc_stub_plt_branch)
8322 size = 28;
8323 }
8324
8325 if (info->emitrelocations
8326 && (stub_entry->stub_type == ppc_stub_long_branch
8327 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8328 stub_entry->stub_sec->reloc_count += 1;
8329 }
8330
8331 stub_entry->stub_sec->size += size;
8332 return TRUE;
8333 }
8334
8335 /* Set up various things so that we can make a list of input sections
8336 for each output section included in the link. Returns -1 on error,
8337 0 when no stubs will be needed, and 1 on success. */
8338
8339 int
8340 ppc64_elf_setup_section_lists (bfd *output_bfd,
8341 struct bfd_link_info *info,
8342 int no_multi_toc)
8343 {
8344 bfd *input_bfd;
8345 int top_id, top_index, id;
8346 asection *section;
8347 asection **input_list;
8348 bfd_size_type amt;
8349 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8350
8351 htab->no_multi_toc = no_multi_toc;
8352
8353 if (htab->brlt == NULL)
8354 return 0;
8355
8356 /* Find the top input section id. */
8357 for (input_bfd = info->input_bfds, top_id = 3;
8358 input_bfd != NULL;
8359 input_bfd = input_bfd->link_next)
8360 {
8361 for (section = input_bfd->sections;
8362 section != NULL;
8363 section = section->next)
8364 {
8365 if (top_id < section->id)
8366 top_id = section->id;
8367 }
8368 }
8369
8370 htab->top_id = top_id;
8371 amt = sizeof (struct map_stub) * (top_id + 1);
8372 htab->stub_group = bfd_zmalloc (amt);
8373 if (htab->stub_group == NULL)
8374 return -1;
8375
8376 /* Set toc_off for com, und, abs and ind sections. */
8377 for (id = 0; id < 3; id++)
8378 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8379
8380 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8381
8382 /* We can't use output_bfd->section_count here to find the top output
8383 section index as some sections may have been removed, and
8384 strip_excluded_output_sections doesn't renumber the indices. */
8385 for (section = output_bfd->sections, top_index = 0;
8386 section != NULL;
8387 section = section->next)
8388 {
8389 if (top_index < section->index)
8390 top_index = section->index;
8391 }
8392
8393 htab->top_index = top_index;
8394 amt = sizeof (asection *) * (top_index + 1);
8395 input_list = bfd_zmalloc (amt);
8396 htab->input_list = input_list;
8397 if (input_list == NULL)
8398 return -1;
8399
8400 return 1;
8401 }
8402
8403 /* The linker repeatedly calls this function for each TOC input section
8404 and linker generated GOT section. Group input bfds such that the toc
8405 within a group is less than 64k in size. Will break with cute linker
8406 scripts that play games with dot in the output toc section. */
8407
8408 void
8409 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8410 {
8411 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8412
8413 if (!htab->no_multi_toc)
8414 {
8415 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8416 bfd_vma off = addr - htab->toc_curr;
8417
8418 if (off + isec->size > 0x10000)
8419 htab->toc_curr = addr;
8420
8421 elf_gp (isec->owner) = (htab->toc_curr
8422 - elf_gp (isec->output_section->owner)
8423 + TOC_BASE_OFF);
8424 }
8425 }
8426
8427 /* Called after the last call to the above function. */
8428
8429 void
8430 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8431 {
8432 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8433
8434 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8435
8436 /* toc_curr tracks the TOC offset used for code sections below in
8437 ppc64_elf_next_input_section. Start off at 0x8000. */
8438 htab->toc_curr = TOC_BASE_OFF;
8439 }
8440
8441 /* No toc references were found in ISEC. If the code in ISEC makes no
8442 calls, then there's no need to use toc adjusting stubs when branching
8443 into ISEC. Actually, indirect calls from ISEC are OK as they will
8444 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8445 needed, and 2 if a cyclical call-graph was found but no other reason
8446 for a stub was detected. If called from the top level, a return of
8447 2 means the same as a return of 0. */
8448
8449 static int
8450 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8451 {
8452 Elf_Internal_Rela *relstart, *rel;
8453 Elf_Internal_Sym *local_syms;
8454 int ret;
8455 struct ppc_link_hash_table *htab;
8456
8457 /* We know none of our code bearing sections will need toc stubs. */
8458 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8459 return 0;
8460
8461 if (isec->size == 0)
8462 return 0;
8463
8464 if (isec->output_section == NULL)
8465 return 0;
8466
8467 /* Hack for linux kernel. .fixup contains branches, but only back to
8468 the function that hit an exception. */
8469 if (strcmp (isec->name, ".fixup") == 0)
8470 return 0;
8471
8472 if (isec->reloc_count == 0)
8473 return 0;
8474
8475 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8476 info->keep_memory);
8477 if (relstart == NULL)
8478 return -1;
8479
8480 /* Look for branches to outside of this section. */
8481 local_syms = NULL;
8482 ret = 0;
8483 htab = ppc_hash_table (info);
8484 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8485 {
8486 enum elf_ppc64_reloc_type r_type;
8487 unsigned long r_symndx;
8488 struct elf_link_hash_entry *h;
8489 Elf_Internal_Sym *sym;
8490 asection *sym_sec;
8491 long *opd_adjust;
8492 bfd_vma sym_value;
8493 bfd_vma dest;
8494
8495 r_type = ELF64_R_TYPE (rel->r_info);
8496 if (r_type != R_PPC64_REL24
8497 && r_type != R_PPC64_REL14
8498 && r_type != R_PPC64_REL14_BRTAKEN
8499 && r_type != R_PPC64_REL14_BRNTAKEN)
8500 continue;
8501
8502 r_symndx = ELF64_R_SYM (rel->r_info);
8503 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8504 isec->owner))
8505 {
8506 ret = -1;
8507 break;
8508 }
8509
8510 /* Calls to dynamic lib functions go through a plt call stub
8511 that uses r2. Branches to undefined symbols might be a call
8512 using old-style dot symbols that can be satisfied by a plt
8513 call into a new-style dynamic library. */
8514 if (sym_sec == NULL)
8515 {
8516 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8517 if (eh != NULL
8518 && eh->oh != NULL
8519 && eh->oh->elf.plt.plist != NULL)
8520 {
8521 ret = 1;
8522 break;
8523 }
8524
8525 /* Ignore other undefined symbols. */
8526 continue;
8527 }
8528
8529 /* Assume branches to other sections not included in the link need
8530 stubs too, to cover -R and absolute syms. */
8531 if (sym_sec->output_section == NULL)
8532 {
8533 ret = 1;
8534 break;
8535 }
8536
8537 if (h == NULL)
8538 sym_value = sym->st_value;
8539 else
8540 {
8541 if (h->root.type != bfd_link_hash_defined
8542 && h->root.type != bfd_link_hash_defweak)
8543 abort ();
8544 sym_value = h->root.u.def.value;
8545 }
8546 sym_value += rel->r_addend;
8547
8548 /* If this branch reloc uses an opd sym, find the code section. */
8549 opd_adjust = get_opd_info (sym_sec);
8550 if (opd_adjust != NULL)
8551 {
8552 if (h == NULL)
8553 {
8554 long adjust;
8555
8556 adjust = opd_adjust[sym->st_value / 8];
8557 if (adjust == -1)
8558 /* Assume deleted functions won't ever be called. */
8559 continue;
8560 sym_value += adjust;
8561 }
8562
8563 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8564 if (dest == (bfd_vma) -1)
8565 continue;
8566 }
8567 else
8568 dest = (sym_value
8569 + sym_sec->output_offset
8570 + sym_sec->output_section->vma);
8571
8572 /* Ignore branch to self. */
8573 if (sym_sec == isec)
8574 continue;
8575
8576 /* If the called function uses the toc, we need a stub. */
8577 if (sym_sec->has_toc_reloc
8578 || sym_sec->makes_toc_func_call)
8579 {
8580 ret = 1;
8581 break;
8582 }
8583
8584 /* Assume any branch that needs a long branch stub might in fact
8585 need a plt_branch stub. A plt_branch stub uses r2. */
8586 else if (dest - (isec->output_offset
8587 + isec->output_section->vma
8588 + rel->r_offset) + (1 << 25) >= (2 << 25))
8589 {
8590 ret = 1;
8591 break;
8592 }
8593
8594 /* If calling back to a section in the process of being tested, we
8595 can't say for sure that no toc adjusting stubs are needed, so
8596 don't return zero. */
8597 else if (sym_sec->call_check_in_progress)
8598 ret = 2;
8599
8600 /* Branches to another section that itself doesn't have any TOC
8601 references are OK. Recursively call ourselves to check. */
8602 else if (sym_sec->id <= htab->top_id
8603 && htab->stub_group[sym_sec->id].toc_off == 0)
8604 {
8605 int recur;
8606
8607 /* Mark current section as indeterminate, so that other
8608 sections that call back to current won't be marked as
8609 known. */
8610 isec->call_check_in_progress = 1;
8611 recur = toc_adjusting_stub_needed (info, sym_sec);
8612 isec->call_check_in_progress = 0;
8613
8614 if (recur < 0)
8615 {
8616 /* An error. Exit. */
8617 ret = -1;
8618 break;
8619 }
8620 else if (recur <= 1)
8621 {
8622 /* Known result. Mark as checked and set section flag. */
8623 htab->stub_group[sym_sec->id].toc_off = 1;
8624 if (recur != 0)
8625 {
8626 sym_sec->makes_toc_func_call = 1;
8627 ret = 1;
8628 break;
8629 }
8630 }
8631 else
8632 {
8633 /* Unknown result. Continue checking. */
8634 ret = 2;
8635 }
8636 }
8637 }
8638
8639 if (local_syms != NULL
8640 && (elf_tdata (isec->owner)->symtab_hdr.contents
8641 != (unsigned char *) local_syms))
8642 free (local_syms);
8643 if (elf_section_data (isec)->relocs != relstart)
8644 free (relstart);
8645
8646 return ret;
8647 }
8648
8649 /* The linker repeatedly calls this function for each input section,
8650 in the order that input sections are linked into output sections.
8651 Build lists of input sections to determine groupings between which
8652 we may insert linker stubs. */
8653
8654 bfd_boolean
8655 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8656 {
8657 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8658
8659 if ((isec->output_section->flags & SEC_CODE) != 0
8660 && isec->output_section->index <= htab->top_index)
8661 {
8662 asection **list = htab->input_list + isec->output_section->index;
8663 /* Steal the link_sec pointer for our list. */
8664 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8665 /* This happens to make the list in reverse order,
8666 which is what we want. */
8667 PREV_SEC (isec) = *list;
8668 *list = isec;
8669 }
8670
8671 if (htab->multi_toc_needed)
8672 {
8673 /* If a code section has a function that uses the TOC then we need
8674 to use the right TOC (obviously). Also, make sure that .opd gets
8675 the correct TOC value for R_PPC64_TOC relocs that don't have or
8676 can't find their function symbol (shouldn't ever happen now). */
8677 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8678 {
8679 if (elf_gp (isec->owner) != 0)
8680 htab->toc_curr = elf_gp (isec->owner);
8681 }
8682 else if (htab->stub_group[isec->id].toc_off == 0)
8683 {
8684 int ret = toc_adjusting_stub_needed (info, isec);
8685 if (ret < 0)
8686 return FALSE;
8687 else
8688 isec->makes_toc_func_call = ret & 1;
8689 }
8690 }
8691
8692 /* Functions that don't use the TOC can belong in any TOC group.
8693 Use the last TOC base. This happens to make _init and _fini
8694 pasting work. */
8695 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8696 return TRUE;
8697 }
8698
8699 /* See whether we can group stub sections together. Grouping stub
8700 sections may result in fewer stubs. More importantly, we need to
8701 put all .init* and .fini* stubs at the beginning of the .init or
8702 .fini output sections respectively, because glibc splits the
8703 _init and _fini functions into multiple parts. Putting a stub in
8704 the middle of a function is not a good idea. */
8705
8706 static void
8707 group_sections (struct ppc_link_hash_table *htab,
8708 bfd_size_type stub_group_size,
8709 bfd_boolean stubs_always_before_branch)
8710 {
8711 asection **list = htab->input_list + htab->top_index;
8712 do
8713 {
8714 asection *tail = *list;
8715 while (tail != NULL)
8716 {
8717 asection *curr;
8718 asection *prev;
8719 bfd_size_type total;
8720 bfd_boolean big_sec;
8721 bfd_vma curr_toc;
8722
8723 curr = tail;
8724 total = tail->size;
8725 big_sec = total >= stub_group_size;
8726 curr_toc = htab->stub_group[tail->id].toc_off;
8727
8728 while ((prev = PREV_SEC (curr)) != NULL
8729 && ((total += curr->output_offset - prev->output_offset)
8730 < stub_group_size)
8731 && htab->stub_group[prev->id].toc_off == curr_toc)
8732 curr = prev;
8733
8734 /* OK, the size from the start of CURR to the end is less
8735 than stub_group_size and thus can be handled by one stub
8736 section. (or the tail section is itself larger than
8737 stub_group_size, in which case we may be toast.) We
8738 should really be keeping track of the total size of stubs
8739 added here, as stubs contribute to the final output
8740 section size. That's a little tricky, and this way will
8741 only break if stubs added make the total size more than
8742 2^25, ie. for the default stub_group_size, if stubs total
8743 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8744 do
8745 {
8746 prev = PREV_SEC (tail);
8747 /* Set up this stub group. */
8748 htab->stub_group[tail->id].link_sec = curr;
8749 }
8750 while (tail != curr && (tail = prev) != NULL);
8751
8752 /* But wait, there's more! Input sections up to stub_group_size
8753 bytes before the stub section can be handled by it too.
8754 Don't do this if we have a really large section after the
8755 stubs, as adding more stubs increases the chance that
8756 branches may not reach into the stub section. */
8757 if (!stubs_always_before_branch && !big_sec)
8758 {
8759 total = 0;
8760 while (prev != NULL
8761 && ((total += tail->output_offset - prev->output_offset)
8762 < stub_group_size)
8763 && htab->stub_group[prev->id].toc_off == curr_toc)
8764 {
8765 tail = prev;
8766 prev = PREV_SEC (tail);
8767 htab->stub_group[tail->id].link_sec = curr;
8768 }
8769 }
8770 tail = prev;
8771 }
8772 }
8773 while (list-- != htab->input_list);
8774 free (htab->input_list);
8775 #undef PREV_SEC
8776 }
8777
8778 /* Determine and set the size of the stub section for a final link.
8779
8780 The basic idea here is to examine all the relocations looking for
8781 PC-relative calls to a target that is unreachable with a "bl"
8782 instruction. */
8783
8784 bfd_boolean
8785 ppc64_elf_size_stubs (bfd *output_bfd,
8786 struct bfd_link_info *info,
8787 bfd_signed_vma group_size,
8788 asection *(*add_stub_section) (const char *, asection *),
8789 void (*layout_sections_again) (void))
8790 {
8791 bfd_size_type stub_group_size;
8792 bfd_boolean stubs_always_before_branch;
8793 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8794
8795 /* Stash our params away. */
8796 htab->add_stub_section = add_stub_section;
8797 htab->layout_sections_again = layout_sections_again;
8798 stubs_always_before_branch = group_size < 0;
8799 if (group_size < 0)
8800 stub_group_size = -group_size;
8801 else
8802 stub_group_size = group_size;
8803 if (stub_group_size == 1)
8804 {
8805 /* Default values. */
8806 if (stubs_always_before_branch)
8807 {
8808 stub_group_size = 0x1e00000;
8809 if (htab->has_14bit_branch)
8810 stub_group_size = 0x7800;
8811 }
8812 else
8813 {
8814 stub_group_size = 0x1c00000;
8815 if (htab->has_14bit_branch)
8816 stub_group_size = 0x7000;
8817 }
8818 }
8819
8820 group_sections (htab, stub_group_size, stubs_always_before_branch);
8821
8822 while (1)
8823 {
8824 bfd *input_bfd;
8825 unsigned int bfd_indx;
8826 asection *stub_sec;
8827 bfd_boolean stub_changed;
8828
8829 htab->stub_iteration += 1;
8830 stub_changed = FALSE;
8831
8832 for (input_bfd = info->input_bfds, bfd_indx = 0;
8833 input_bfd != NULL;
8834 input_bfd = input_bfd->link_next, bfd_indx++)
8835 {
8836 Elf_Internal_Shdr *symtab_hdr;
8837 asection *section;
8838 Elf_Internal_Sym *local_syms = NULL;
8839
8840 /* We'll need the symbol table in a second. */
8841 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8842 if (symtab_hdr->sh_info == 0)
8843 continue;
8844
8845 /* Walk over each section attached to the input bfd. */
8846 for (section = input_bfd->sections;
8847 section != NULL;
8848 section = section->next)
8849 {
8850 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8851
8852 /* If there aren't any relocs, then there's nothing more
8853 to do. */
8854 if ((section->flags & SEC_RELOC) == 0
8855 || section->reloc_count == 0)
8856 continue;
8857
8858 /* If this section is a link-once section that will be
8859 discarded, then don't create any stubs. */
8860 if (section->output_section == NULL
8861 || section->output_section->owner != output_bfd)
8862 continue;
8863
8864 /* Get the relocs. */
8865 internal_relocs
8866 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8867 info->keep_memory);
8868 if (internal_relocs == NULL)
8869 goto error_ret_free_local;
8870
8871 /* Now examine each relocation. */
8872 irela = internal_relocs;
8873 irelaend = irela + section->reloc_count;
8874 for (; irela < irelaend; irela++)
8875 {
8876 enum elf_ppc64_reloc_type r_type;
8877 unsigned int r_indx;
8878 enum ppc_stub_type stub_type;
8879 struct ppc_stub_hash_entry *stub_entry;
8880 asection *sym_sec, *code_sec;
8881 bfd_vma sym_value;
8882 bfd_vma destination;
8883 bfd_boolean ok_dest;
8884 struct ppc_link_hash_entry *hash;
8885 struct ppc_link_hash_entry *fdh;
8886 struct elf_link_hash_entry *h;
8887 Elf_Internal_Sym *sym;
8888 char *stub_name;
8889 const asection *id_sec;
8890 long *opd_adjust;
8891
8892 r_type = ELF64_R_TYPE (irela->r_info);
8893 r_indx = ELF64_R_SYM (irela->r_info);
8894
8895 if (r_type >= R_PPC64_max)
8896 {
8897 bfd_set_error (bfd_error_bad_value);
8898 goto error_ret_free_internal;
8899 }
8900
8901 /* Only look for stubs on branch instructions. */
8902 if (r_type != R_PPC64_REL24
8903 && r_type != R_PPC64_REL14
8904 && r_type != R_PPC64_REL14_BRTAKEN
8905 && r_type != R_PPC64_REL14_BRNTAKEN)
8906 continue;
8907
8908 /* Now determine the call target, its name, value,
8909 section. */
8910 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8911 r_indx, input_bfd))
8912 goto error_ret_free_internal;
8913 hash = (struct ppc_link_hash_entry *) h;
8914
8915 ok_dest = FALSE;
8916 fdh = NULL;
8917 if (hash == NULL)
8918 {
8919 sym_value = sym->st_value;
8920 ok_dest = TRUE;
8921 }
8922 else
8923 {
8924 sym_value = 0;
8925 /* Recognise an old ABI func code entry sym, and
8926 use the func descriptor sym instead. */
8927 if (hash->elf.root.root.string[0] == '.'
8928 && (fdh = get_fdh (hash, htab)) != NULL)
8929 {
8930 if (fdh->elf.root.type == bfd_link_hash_defined
8931 || fdh->elf.root.type == bfd_link_hash_defweak)
8932 {
8933 sym_sec = fdh->elf.root.u.def.section;
8934 sym_value = fdh->elf.root.u.def.value;
8935 if (sym_sec->output_section != NULL)
8936 ok_dest = TRUE;
8937 }
8938 else
8939 fdh = NULL;
8940 }
8941 else if (hash->elf.root.type == bfd_link_hash_defined
8942 || hash->elf.root.type == bfd_link_hash_defweak)
8943 {
8944 sym_value = hash->elf.root.u.def.value;
8945 if (sym_sec->output_section != NULL)
8946 ok_dest = TRUE;
8947 }
8948 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8949 ;
8950 else if (hash->elf.root.type == bfd_link_hash_undefined)
8951 ;
8952 else
8953 {
8954 bfd_set_error (bfd_error_bad_value);
8955 goto error_ret_free_internal;
8956 }
8957 }
8958
8959 destination = 0;
8960 if (ok_dest)
8961 {
8962 sym_value += irela->r_addend;
8963 destination = (sym_value
8964 + sym_sec->output_offset
8965 + sym_sec->output_section->vma);
8966 }
8967
8968 code_sec = sym_sec;
8969 opd_adjust = get_opd_info (sym_sec);
8970 if (opd_adjust != NULL)
8971 {
8972 bfd_vma dest;
8973
8974 if (hash == NULL)
8975 {
8976 long adjust = opd_adjust[sym_value / 8];
8977 if (adjust == -1)
8978 continue;
8979 sym_value += adjust;
8980 }
8981 dest = opd_entry_value (sym_sec, sym_value,
8982 &code_sec, &sym_value);
8983 if (dest != (bfd_vma) -1)
8984 {
8985 destination = dest;
8986 if (fdh != NULL)
8987 {
8988 /* Fixup old ABI sym to point at code
8989 entry. */
8990 hash->elf.root.type = bfd_link_hash_defweak;
8991 hash->elf.root.u.def.section = code_sec;
8992 hash->elf.root.u.def.value = sym_value;
8993 }
8994 }
8995 }
8996
8997 /* Determine what (if any) linker stub is needed. */
8998 stub_type = ppc_type_of_stub (section, irela, &hash,
8999 destination);
9000
9001 if (stub_type != ppc_stub_plt_call)
9002 {
9003 /* Check whether we need a TOC adjusting stub.
9004 Since the linker pastes together pieces from
9005 different object files when creating the
9006 _init and _fini functions, it may be that a
9007 call to what looks like a local sym is in
9008 fact a call needing a TOC adjustment. */
9009 if (code_sec != NULL
9010 && code_sec->output_section != NULL
9011 && (htab->stub_group[code_sec->id].toc_off
9012 != htab->stub_group[section->id].toc_off)
9013 && (code_sec->has_toc_reloc
9014 || code_sec->makes_toc_func_call))
9015 stub_type = ppc_stub_long_branch_r2off;
9016 }
9017
9018 if (stub_type == ppc_stub_none)
9019 continue;
9020
9021 /* __tls_get_addr calls might be eliminated. */
9022 if (stub_type != ppc_stub_plt_call
9023 && hash != NULL
9024 && (hash == htab->tls_get_addr
9025 || hash == htab->tls_get_addr_fd)
9026 && section->has_tls_reloc
9027 && irela != internal_relocs)
9028 {
9029 /* Get tls info. */
9030 char *tls_mask;
9031
9032 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9033 irela - 1, input_bfd))
9034 goto error_ret_free_internal;
9035 if (*tls_mask != 0)
9036 continue;
9037 }
9038
9039 /* Support for grouping stub sections. */
9040 id_sec = htab->stub_group[section->id].link_sec;
9041
9042 /* Get the name of this stub. */
9043 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9044 if (!stub_name)
9045 goto error_ret_free_internal;
9046
9047 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9048 stub_name, FALSE, FALSE);
9049 if (stub_entry != NULL)
9050 {
9051 /* The proper stub has already been created. */
9052 free (stub_name);
9053 continue;
9054 }
9055
9056 stub_entry = ppc_add_stub (stub_name, section, htab);
9057 if (stub_entry == NULL)
9058 {
9059 free (stub_name);
9060 error_ret_free_internal:
9061 if (elf_section_data (section)->relocs == NULL)
9062 free (internal_relocs);
9063 error_ret_free_local:
9064 if (local_syms != NULL
9065 && (symtab_hdr->contents
9066 != (unsigned char *) local_syms))
9067 free (local_syms);
9068 return FALSE;
9069 }
9070
9071 stub_entry->stub_type = stub_type;
9072 stub_entry->target_value = sym_value;
9073 stub_entry->target_section = code_sec;
9074 stub_entry->h = hash;
9075 stub_entry->addend = irela->r_addend;
9076
9077 if (stub_entry->h != NULL)
9078 htab->stub_globals += 1;
9079
9080 stub_changed = TRUE;
9081 }
9082
9083 /* We're done with the internal relocs, free them. */
9084 if (elf_section_data (section)->relocs != internal_relocs)
9085 free (internal_relocs);
9086 }
9087
9088 if (local_syms != NULL
9089 && symtab_hdr->contents != (unsigned char *) local_syms)
9090 {
9091 if (!info->keep_memory)
9092 free (local_syms);
9093 else
9094 symtab_hdr->contents = (unsigned char *) local_syms;
9095 }
9096 }
9097
9098 if (!stub_changed)
9099 break;
9100
9101 /* OK, we've added some stubs. Find out the new size of the
9102 stub sections. */
9103 for (stub_sec = htab->stub_bfd->sections;
9104 stub_sec != NULL;
9105 stub_sec = stub_sec->next)
9106 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9107 {
9108 stub_sec->size = 0;
9109 stub_sec->reloc_count = 0;
9110 }
9111
9112 htab->brlt->size = 0;
9113 if (htab->relbrlt != NULL)
9114 htab->relbrlt->size = 0;
9115
9116 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9117
9118 /* Ask the linker to do its stuff. */
9119 (*htab->layout_sections_again) ();
9120 }
9121
9122 /* It would be nice to strip .branch_lt from the output if the
9123 section is empty, but it's too late. If we strip sections here,
9124 the dynamic symbol table is corrupted since the section symbol
9125 for the stripped section isn't written. */
9126
9127 return TRUE;
9128 }
9129
9130 /* Called after we have determined section placement. If sections
9131 move, we'll be called again. Provide a value for TOCstart. */
9132
9133 bfd_vma
9134 ppc64_elf_toc (bfd *obfd)
9135 {
9136 asection *s;
9137 bfd_vma TOCstart;
9138
9139 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9140 order. The TOC starts where the first of these sections starts. */
9141 s = bfd_get_section_by_name (obfd, ".got");
9142 if (s == NULL)
9143 s = bfd_get_section_by_name (obfd, ".toc");
9144 if (s == NULL)
9145 s = bfd_get_section_by_name (obfd, ".tocbss");
9146 if (s == NULL)
9147 s = bfd_get_section_by_name (obfd, ".plt");
9148 if (s == NULL)
9149 {
9150 /* This may happen for
9151 o references to TOC base (SYM@toc / TOC[tc0]) without a
9152 .toc directive
9153 o bad linker script
9154 o --gc-sections and empty TOC sections
9155
9156 FIXME: Warn user? */
9157
9158 /* Look for a likely section. We probably won't even be
9159 using TOCstart. */
9160 for (s = obfd->sections; s != NULL; s = s->next)
9161 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9162 == (SEC_ALLOC | SEC_SMALL_DATA))
9163 break;
9164 if (s == NULL)
9165 for (s = obfd->sections; s != NULL; s = s->next)
9166 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9167 == (SEC_ALLOC | SEC_SMALL_DATA))
9168 break;
9169 if (s == NULL)
9170 for (s = obfd->sections; s != NULL; s = s->next)
9171 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9172 break;
9173 if (s == NULL)
9174 for (s = obfd->sections; s != NULL; s = s->next)
9175 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9176 break;
9177 }
9178
9179 TOCstart = 0;
9180 if (s != NULL)
9181 TOCstart = s->output_section->vma + s->output_offset;
9182
9183 return TOCstart;
9184 }
9185
9186 /* Build all the stubs associated with the current output file.
9187 The stubs are kept in a hash table attached to the main linker
9188 hash table. This function is called via gldelf64ppc_finish. */
9189
9190 bfd_boolean
9191 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9192 struct bfd_link_info *info,
9193 char **stats)
9194 {
9195 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9196 asection *stub_sec;
9197 bfd_byte *p;
9198 int stub_sec_count = 0;
9199
9200 htab->emit_stub_syms = emit_stub_syms;
9201
9202 /* Allocate memory to hold the linker stubs. */
9203 for (stub_sec = htab->stub_bfd->sections;
9204 stub_sec != NULL;
9205 stub_sec = stub_sec->next)
9206 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9207 && stub_sec->size != 0)
9208 {
9209 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9210 if (stub_sec->contents == NULL)
9211 return FALSE;
9212 /* We want to check that built size is the same as calculated
9213 size. rawsize is a convenient location to use. */
9214 stub_sec->rawsize = stub_sec->size;
9215 stub_sec->size = 0;
9216 }
9217
9218 if (htab->plt != NULL)
9219 {
9220 unsigned int indx;
9221 bfd_vma plt0;
9222
9223 /* Build the .glink plt call stub. */
9224 plt0 = (htab->plt->output_section->vma
9225 + htab->plt->output_offset
9226 - (htab->glink->output_section->vma
9227 + htab->glink->output_offset
9228 + GLINK_CALL_STUB_SIZE));
9229 if (plt0 + 0x80008000 > 0xffffffff)
9230 {
9231 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9232 bfd_set_error (bfd_error_bad_value);
9233 return FALSE;
9234 }
9235
9236 if (htab->emit_stub_syms)
9237 {
9238 struct elf_link_hash_entry *h;
9239 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9240 if (h == NULL)
9241 return FALSE;
9242 if (h->root.type == bfd_link_hash_new)
9243 {
9244 h->root.type = bfd_link_hash_defined;
9245 h->root.u.def.section = htab->glink;
9246 h->root.u.def.value = 0;
9247 h->ref_regular = 1;
9248 h->def_regular = 1;
9249 h->ref_regular_nonweak = 1;
9250 h->forced_local = 1;
9251 h->non_elf = 0;
9252 }
9253 }
9254 p = htab->glink->contents;
9255 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9256 p += 4;
9257 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9258 p += 4;
9259 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9260 p += 4;
9261 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9262 p += 4;
9263 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9264 p += 4;
9265 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9266 p += 4;
9267 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9268 p += 4;
9269 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9270 p += 4;
9271 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9272 p += 4;
9273 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9274 p += 4;
9275 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9276 p += 4;
9277 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9278 p += 4;
9279 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9280 p += 4;
9281 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9282 p += 4;
9283 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9284 p += 4;
9285 bfd_put_32 (htab->glink->owner, BCTR, p);
9286 p += 4;
9287
9288 /* Build the .glink lazy link call stubs. */
9289 indx = 0;
9290 while (p < htab->glink->contents + htab->glink->size)
9291 {
9292 if (indx < 0x8000)
9293 {
9294 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9295 p += 4;
9296 }
9297 else
9298 {
9299 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9300 p += 4;
9301 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9302 p += 4;
9303 }
9304 bfd_put_32 (htab->glink->owner,
9305 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9306 indx++;
9307 p += 4;
9308 }
9309 htab->glink->rawsize = p - htab->glink->contents;
9310 }
9311
9312 if (htab->brlt->size != 0)
9313 {
9314 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9315 htab->brlt->size);
9316 if (htab->brlt->contents == NULL)
9317 return FALSE;
9318 }
9319 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9320 {
9321 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9322 htab->relbrlt->size);
9323 if (htab->relbrlt->contents == NULL)
9324 return FALSE;
9325 }
9326
9327 /* Build the stubs as directed by the stub hash table. */
9328 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9329
9330 for (stub_sec = htab->stub_bfd->sections;
9331 stub_sec != NULL;
9332 stub_sec = stub_sec->next)
9333 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9334 {
9335 stub_sec_count += 1;
9336 if (stub_sec->rawsize != stub_sec->size)
9337 break;
9338 }
9339
9340 if (stub_sec != NULL
9341 || htab->glink->rawsize != htab->glink->size)
9342 {
9343 htab->stub_error = TRUE;
9344 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9345 }
9346
9347 if (htab->stub_error)
9348 return FALSE;
9349
9350 if (stats != NULL)
9351 {
9352 *stats = bfd_malloc (500);
9353 if (*stats == NULL)
9354 return FALSE;
9355
9356 sprintf (*stats, _("linker stubs in %u group%s\n"
9357 " branch %lu\n"
9358 " toc adjust %lu\n"
9359 " long branch %lu\n"
9360 " long toc adj %lu\n"
9361 " plt call %lu"),
9362 stub_sec_count,
9363 stub_sec_count == 1 ? "" : "s",
9364 htab->stub_count[ppc_stub_long_branch - 1],
9365 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9366 htab->stub_count[ppc_stub_plt_branch - 1],
9367 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9368 htab->stub_count[ppc_stub_plt_call - 1]);
9369 }
9370 return TRUE;
9371 }
9372
9373 /* This function undoes the changes made by add_symbol_adjust. */
9374
9375 static bfd_boolean
9376 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9377 {
9378 struct ppc_link_hash_entry *eh;
9379
9380 if (h->root.type == bfd_link_hash_indirect)
9381 return TRUE;
9382
9383 if (h->root.type == bfd_link_hash_warning)
9384 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9385
9386 eh = (struct ppc_link_hash_entry *) h;
9387 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9388 return TRUE;
9389
9390 eh->elf.root.type = bfd_link_hash_undefined;
9391 return TRUE;
9392 }
9393
9394 void
9395 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9396 {
9397 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9398 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9399 }
9400
9401 /* The RELOCATE_SECTION function is called by the ELF backend linker
9402 to handle the relocations for a section.
9403
9404 The relocs are always passed as Rela structures; if the section
9405 actually uses Rel structures, the r_addend field will always be
9406 zero.
9407
9408 This function is responsible for adjust the section contents as
9409 necessary, and (if using Rela relocs and generating a
9410 relocatable output file) adjusting the reloc addend as
9411 necessary.
9412
9413 This function does not have to worry about setting the reloc
9414 address or the reloc symbol index.
9415
9416 LOCAL_SYMS is a pointer to the swapped in local symbols.
9417
9418 LOCAL_SECTIONS is an array giving the section in the input file
9419 corresponding to the st_shndx field of each local symbol.
9420
9421 The global hash table entry for the global symbols can be found
9422 via elf_sym_hashes (input_bfd).
9423
9424 When generating relocatable output, this function must handle
9425 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9426 going to be the section symbol corresponding to the output
9427 section, which means that the addend must be adjusted
9428 accordingly. */
9429
9430 static bfd_boolean
9431 ppc64_elf_relocate_section (bfd *output_bfd,
9432 struct bfd_link_info *info,
9433 bfd *input_bfd,
9434 asection *input_section,
9435 bfd_byte *contents,
9436 Elf_Internal_Rela *relocs,
9437 Elf_Internal_Sym *local_syms,
9438 asection **local_sections)
9439 {
9440 struct ppc_link_hash_table *htab;
9441 Elf_Internal_Shdr *symtab_hdr;
9442 struct elf_link_hash_entry **sym_hashes;
9443 Elf_Internal_Rela *rel;
9444 Elf_Internal_Rela *relend;
9445 Elf_Internal_Rela outrel;
9446 bfd_byte *loc;
9447 struct got_entry **local_got_ents;
9448 bfd_vma TOCstart;
9449 bfd_boolean ret = TRUE;
9450 bfd_boolean is_opd;
9451 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9452 bfd_boolean is_power4 = FALSE;
9453
9454 if (info->relocatable)
9455 return TRUE;
9456
9457 /* Initialize howto table if needed. */
9458 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9459 ppc_howto_init ();
9460
9461 htab = ppc_hash_table (info);
9462
9463 /* Don't relocate stub sections. */
9464 if (input_section->owner == htab->stub_bfd)
9465 return TRUE;
9466
9467 local_got_ents = elf_local_got_ents (input_bfd);
9468 TOCstart = elf_gp (output_bfd);
9469 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9470 sym_hashes = elf_sym_hashes (input_bfd);
9471 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9472
9473 rel = relocs;
9474 relend = relocs + input_section->reloc_count;
9475 for (; rel < relend; rel++)
9476 {
9477 enum elf_ppc64_reloc_type r_type;
9478 bfd_vma addend;
9479 bfd_reloc_status_type r;
9480 Elf_Internal_Sym *sym;
9481 asection *sec;
9482 struct elf_link_hash_entry *h_elf;
9483 struct ppc_link_hash_entry *h;
9484 struct ppc_link_hash_entry *fdh;
9485 const char *sym_name;
9486 unsigned long r_symndx, toc_symndx;
9487 char tls_mask, tls_gd, tls_type;
9488 char sym_type;
9489 bfd_vma relocation;
9490 bfd_boolean unresolved_reloc;
9491 bfd_boolean warned;
9492 unsigned long insn, mask;
9493 struct ppc_stub_hash_entry *stub_entry;
9494 bfd_vma max_br_offset;
9495 bfd_vma from;
9496
9497 r_type = ELF64_R_TYPE (rel->r_info);
9498 r_symndx = ELF64_R_SYM (rel->r_info);
9499
9500 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9501 symbol of the previous ADDR64 reloc. The symbol gives us the
9502 proper TOC base to use. */
9503 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9504 && rel != relocs
9505 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9506 && is_opd)
9507 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9508
9509 sym = NULL;
9510 sec = NULL;
9511 h_elf = NULL;
9512 sym_name = NULL;
9513 unresolved_reloc = FALSE;
9514 warned = FALSE;
9515
9516 if (r_symndx < symtab_hdr->sh_info)
9517 {
9518 /* It's a local symbol. */
9519 long *opd_adjust;
9520
9521 sym = local_syms + r_symndx;
9522 sec = local_sections[r_symndx];
9523 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9524 sym_type = ELF64_ST_TYPE (sym->st_info);
9525 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9526 opd_adjust = get_opd_info (sec);
9527 if (opd_adjust != NULL)
9528 {
9529 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9530 if (adjust == -1)
9531 relocation = 0;
9532 else
9533 relocation += adjust;
9534 }
9535 }
9536 else
9537 {
9538 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9539 r_symndx, symtab_hdr, sym_hashes,
9540 h_elf, sec, relocation,
9541 unresolved_reloc, warned);
9542 sym_name = h_elf->root.root.string;
9543 sym_type = h_elf->type;
9544 }
9545 h = (struct ppc_link_hash_entry *) h_elf;
9546
9547 /* TLS optimizations. Replace instruction sequences and relocs
9548 based on information we collected in tls_optimize. We edit
9549 RELOCS so that --emit-relocs will output something sensible
9550 for the final instruction stream. */
9551 tls_mask = 0;
9552 tls_gd = 0;
9553 toc_symndx = 0;
9554 if (IS_PPC64_TLS_RELOC (r_type))
9555 {
9556 if (h != NULL)
9557 tls_mask = h->tls_mask;
9558 else if (local_got_ents != NULL)
9559 {
9560 char *lgot_masks;
9561 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9562 tls_mask = lgot_masks[r_symndx];
9563 }
9564 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9565 {
9566 /* Check for toc tls entries. */
9567 char *toc_tls;
9568
9569 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9570 rel, input_bfd))
9571 return FALSE;
9572
9573 if (toc_tls)
9574 tls_mask = *toc_tls;
9575 }
9576 }
9577
9578 /* Check that tls relocs are used with tls syms, and non-tls
9579 relocs are used with non-tls syms. */
9580 if (r_symndx != 0
9581 && r_type != R_PPC64_NONE
9582 && (h == NULL
9583 || h->elf.root.type == bfd_link_hash_defined
9584 || h->elf.root.type == bfd_link_hash_defweak)
9585 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9586 {
9587 if (r_type == R_PPC64_TLS && tls_mask != 0)
9588 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9589 ;
9590 else
9591 (*_bfd_error_handler)
9592 (sym_type == STT_TLS
9593 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9594 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9595 input_bfd,
9596 input_section,
9597 (long) rel->r_offset,
9598 ppc64_elf_howto_table[r_type]->name,
9599 sym_name);
9600 }
9601
9602 /* Ensure reloc mapping code below stays sane. */
9603 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9604 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9605 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9606 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9607 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9608 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9609 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9610 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9611 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9612 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9613 abort ();
9614
9615 switch (r_type)
9616 {
9617 default:
9618 break;
9619
9620 case R_PPC64_TOC16:
9621 case R_PPC64_TOC16_LO:
9622 case R_PPC64_TOC16_DS:
9623 case R_PPC64_TOC16_LO_DS:
9624 {
9625 /* Check for toc tls entries. */
9626 char *toc_tls;
9627 int retval;
9628
9629 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9630 rel, input_bfd);
9631 if (retval == 0)
9632 return FALSE;
9633
9634 if (toc_tls)
9635 {
9636 tls_mask = *toc_tls;
9637 if (r_type == R_PPC64_TOC16_DS
9638 || r_type == R_PPC64_TOC16_LO_DS)
9639 {
9640 if (tls_mask != 0
9641 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9642 goto toctprel;
9643 }
9644 else
9645 {
9646 /* If we found a GD reloc pair, then we might be
9647 doing a GD->IE transition. */
9648 if (retval == 2)
9649 {
9650 tls_gd = TLS_TPRELGD;
9651 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9652 goto tls_get_addr_check;
9653 }
9654 else if (retval == 3)
9655 {
9656 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9657 goto tls_get_addr_check;
9658 }
9659 }
9660 }
9661 }
9662 break;
9663
9664 case R_PPC64_GOT_TPREL16_DS:
9665 case R_PPC64_GOT_TPREL16_LO_DS:
9666 if (tls_mask != 0
9667 && (tls_mask & TLS_TPREL) == 0)
9668 {
9669 toctprel:
9670 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9671 insn &= 31 << 21;
9672 insn |= 0x3c0d0000; /* addis 0,13,0 */
9673 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9674 r_type = R_PPC64_TPREL16_HA;
9675 if (toc_symndx != 0)
9676 {
9677 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9678 /* We changed the symbol. Start over in order to
9679 get h, sym, sec etc. right. */
9680 rel--;
9681 continue;
9682 }
9683 else
9684 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9685 }
9686 break;
9687
9688 case R_PPC64_TLS:
9689 if (tls_mask != 0
9690 && (tls_mask & TLS_TPREL) == 0)
9691 {
9692 bfd_vma rtra;
9693 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9694 if ((insn & ((0x3f << 26) | (31 << 11)))
9695 == ((31 << 26) | (13 << 11)))
9696 rtra = insn & ((1 << 26) - (1 << 16));
9697 else if ((insn & ((0x3f << 26) | (31 << 16)))
9698 == ((31 << 26) | (13 << 16)))
9699 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9700 else
9701 abort ();
9702 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9703 /* add -> addi. */
9704 insn = 14 << 26;
9705 else if ((insn & (31 << 1)) == 23 << 1
9706 && ((insn & (31 << 6)) < 14 << 6
9707 || ((insn & (31 << 6)) >= 16 << 6
9708 && (insn & (31 << 6)) < 24 << 6)))
9709 /* load and store indexed -> dform. */
9710 insn = (32 | ((insn >> 6) & 31)) << 26;
9711 else if ((insn & (31 << 1)) == 21 << 1
9712 && (insn & (0x1a << 6)) == 0)
9713 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9714 insn = (((58 | ((insn >> 6) & 4)) << 26)
9715 | ((insn >> 6) & 1));
9716 else if ((insn & (31 << 1)) == 21 << 1
9717 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9718 /* lwax -> lwa. */
9719 insn = (58 << 26) | 2;
9720 else
9721 abort ();
9722 insn |= rtra;
9723 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9724 /* Was PPC64_TLS which sits on insn boundary, now
9725 PPC64_TPREL16_LO which is at insn+2. */
9726 rel->r_offset += 2;
9727 r_type = R_PPC64_TPREL16_LO;
9728 if (toc_symndx != 0)
9729 {
9730 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9731 /* We changed the symbol. Start over in order to
9732 get h, sym, sec etc. right. */
9733 rel--;
9734 continue;
9735 }
9736 else
9737 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9738 }
9739 break;
9740
9741 case R_PPC64_GOT_TLSGD16_HI:
9742 case R_PPC64_GOT_TLSGD16_HA:
9743 tls_gd = TLS_TPRELGD;
9744 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9745 goto tls_gdld_hi;
9746 break;
9747
9748 case R_PPC64_GOT_TLSLD16_HI:
9749 case R_PPC64_GOT_TLSLD16_HA:
9750 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9751 {
9752 tls_gdld_hi:
9753 if ((tls_mask & tls_gd) != 0)
9754 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9755 + R_PPC64_GOT_TPREL16_DS);
9756 else
9757 {
9758 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9759 rel->r_offset -= 2;
9760 r_type = R_PPC64_NONE;
9761 }
9762 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9763 }
9764 break;
9765
9766 case R_PPC64_GOT_TLSGD16:
9767 case R_PPC64_GOT_TLSGD16_LO:
9768 tls_gd = TLS_TPRELGD;
9769 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9770 goto tls_get_addr_check;
9771 break;
9772
9773 case R_PPC64_GOT_TLSLD16:
9774 case R_PPC64_GOT_TLSLD16_LO:
9775 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9776 {
9777 tls_get_addr_check:
9778 if (rel + 1 < relend)
9779 {
9780 enum elf_ppc64_reloc_type r_type2;
9781 unsigned long r_symndx2;
9782 struct elf_link_hash_entry *h2;
9783 bfd_vma insn1, insn2, insn3;
9784 bfd_vma offset;
9785
9786 /* The next instruction should be a call to
9787 __tls_get_addr. Peek at the reloc to be sure. */
9788 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9789 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9790 if (r_symndx2 < symtab_hdr->sh_info
9791 || (r_type2 != R_PPC64_REL14
9792 && r_type2 != R_PPC64_REL14_BRTAKEN
9793 && r_type2 != R_PPC64_REL14_BRNTAKEN
9794 && r_type2 != R_PPC64_REL24))
9795 break;
9796
9797 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9798 while (h2->root.type == bfd_link_hash_indirect
9799 || h2->root.type == bfd_link_hash_warning)
9800 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9801 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9802 && h2 != &htab->tls_get_addr_fd->elf))
9803 break;
9804
9805 /* OK, it checks out. Replace the call. */
9806 offset = rel[1].r_offset;
9807 insn1 = bfd_get_32 (output_bfd,
9808 contents + rel->r_offset - 2);
9809 insn3 = bfd_get_32 (output_bfd,
9810 contents + offset + 4);
9811 if ((tls_mask & tls_gd) != 0)
9812 {
9813 /* IE */
9814 insn1 &= (1 << 26) - (1 << 2);
9815 insn1 |= 58 << 26; /* ld */
9816 insn2 = 0x7c636a14; /* add 3,3,13 */
9817 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9818 if ((tls_mask & TLS_EXPLICIT) == 0)
9819 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9820 + R_PPC64_GOT_TPREL16_DS);
9821 else
9822 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9823 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9824 }
9825 else
9826 {
9827 /* LE */
9828 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9829 insn2 = 0x38630000; /* addi 3,3,0 */
9830 if (tls_gd == 0)
9831 {
9832 /* Was an LD reloc. */
9833 r_symndx = 0;
9834 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9835 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9836 }
9837 else if (toc_symndx != 0)
9838 r_symndx = toc_symndx;
9839 r_type = R_PPC64_TPREL16_HA;
9840 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9841 rel[1].r_info = ELF64_R_INFO (r_symndx,
9842 R_PPC64_TPREL16_LO);
9843 rel[1].r_offset += 2;
9844 }
9845 if (insn3 == NOP
9846 || insn3 == CROR_151515 || insn3 == CROR_313131)
9847 {
9848 insn3 = insn2;
9849 insn2 = NOP;
9850 rel[1].r_offset += 4;
9851 }
9852 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9853 bfd_put_32 (output_bfd, insn2, contents + offset);
9854 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9855 if (tls_gd == 0 || toc_symndx != 0)
9856 {
9857 /* We changed the symbol. Start over in order
9858 to get h, sym, sec etc. right. */
9859 rel--;
9860 continue;
9861 }
9862 }
9863 }
9864 break;
9865
9866 case R_PPC64_DTPMOD64:
9867 if (rel + 1 < relend
9868 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9869 && rel[1].r_offset == rel->r_offset + 8)
9870 {
9871 if ((tls_mask & TLS_GD) == 0)
9872 {
9873 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9874 if ((tls_mask & TLS_TPRELGD) != 0)
9875 r_type = R_PPC64_TPREL64;
9876 else
9877 {
9878 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9879 r_type = R_PPC64_NONE;
9880 }
9881 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9882 }
9883 }
9884 else
9885 {
9886 if ((tls_mask & TLS_LD) == 0)
9887 {
9888 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9889 r_type = R_PPC64_NONE;
9890 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9891 }
9892 }
9893 break;
9894
9895 case R_PPC64_TPREL64:
9896 if ((tls_mask & TLS_TPREL) == 0)
9897 {
9898 r_type = R_PPC64_NONE;
9899 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9900 }
9901 break;
9902 }
9903
9904 /* Handle other relocations that tweak non-addend part of insn. */
9905 insn = 0;
9906 max_br_offset = 1 << 25;
9907 addend = rel->r_addend;
9908 switch (r_type)
9909 {
9910 default:
9911 break;
9912
9913 /* Branch taken prediction relocations. */
9914 case R_PPC64_ADDR14_BRTAKEN:
9915 case R_PPC64_REL14_BRTAKEN:
9916 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9917 /* Fall thru. */
9918
9919 /* Branch not taken prediction relocations. */
9920 case R_PPC64_ADDR14_BRNTAKEN:
9921 case R_PPC64_REL14_BRNTAKEN:
9922 insn |= bfd_get_32 (output_bfd,
9923 contents + rel->r_offset) & ~(0x01 << 21);
9924 /* Fall thru. */
9925
9926 case R_PPC64_REL14:
9927 max_br_offset = 1 << 15;
9928 /* Fall thru. */
9929
9930 case R_PPC64_REL24:
9931 /* Calls to functions with a different TOC, such as calls to
9932 shared objects, need to alter the TOC pointer. This is
9933 done using a linkage stub. A REL24 branching to these
9934 linkage stubs needs to be followed by a nop, as the nop
9935 will be replaced with an instruction to restore the TOC
9936 base pointer. */
9937 stub_entry = NULL;
9938 fdh = h;
9939 if (((h != NULL
9940 && (((fdh = h->oh) != NULL
9941 && fdh->elf.plt.plist != NULL)
9942 || (fdh = h)->elf.plt.plist != NULL))
9943 || (sec != NULL
9944 && sec->output_section != NULL
9945 && sec->id <= htab->top_id
9946 && (htab->stub_group[sec->id].toc_off
9947 != htab->stub_group[input_section->id].toc_off)))
9948 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9949 rel, htab)) != NULL
9950 && (stub_entry->stub_type == ppc_stub_plt_call
9951 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9952 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9953 {
9954 bfd_boolean can_plt_call = FALSE;
9955
9956 if (rel->r_offset + 8 <= input_section->size)
9957 {
9958 unsigned long nop;
9959 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9960 if (nop == NOP
9961 || nop == CROR_151515 || nop == CROR_313131)
9962 {
9963 bfd_put_32 (input_bfd, LD_R2_40R1,
9964 contents + rel->r_offset + 4);
9965 can_plt_call = TRUE;
9966 }
9967 }
9968
9969 if (!can_plt_call)
9970 {
9971 if (stub_entry->stub_type == ppc_stub_plt_call)
9972 {
9973 /* If this is a plain branch rather than a branch
9974 and link, don't require a nop. */
9975 unsigned long br;
9976 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
9977 if ((br & 1) == 0)
9978 can_plt_call = TRUE;
9979 }
9980 else if (h != NULL
9981 && strcmp (h->elf.root.root.string,
9982 ".__libc_start_main") == 0)
9983 {
9984 /* Allow crt1 branch to go via a toc adjusting stub. */
9985 can_plt_call = TRUE;
9986 }
9987 else
9988 {
9989 if (strcmp (input_section->output_section->name,
9990 ".init") == 0
9991 || strcmp (input_section->output_section->name,
9992 ".fini") == 0)
9993 (*_bfd_error_handler)
9994 (_("%B(%A+0x%lx): automatic multiple TOCs "
9995 "not supported using your crt files; "
9996 "recompile with -mminimal-toc or upgrade gcc"),
9997 input_bfd,
9998 input_section,
9999 (long) rel->r_offset);
10000 else
10001 (*_bfd_error_handler)
10002 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10003 "does not allow automatic multiple TOCs; "
10004 "recompile with -mminimal-toc or "
10005 "-fno-optimize-sibling-calls, "
10006 "or make `%s' extern"),
10007 input_bfd,
10008 input_section,
10009 (long) rel->r_offset,
10010 sym_name,
10011 sym_name);
10012 bfd_set_error (bfd_error_bad_value);
10013 ret = FALSE;
10014 }
10015 }
10016
10017 if (can_plt_call
10018 && stub_entry->stub_type == ppc_stub_plt_call)
10019 unresolved_reloc = FALSE;
10020 }
10021
10022 if (stub_entry == NULL
10023 && get_opd_info (sec) != NULL)
10024 {
10025 /* The branch destination is the value of the opd entry. */
10026 bfd_vma off = (relocation - sec->output_section->vma
10027 - sec->output_offset + rel->r_addend);
10028 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10029 if (dest != (bfd_vma) -1)
10030 {
10031 relocation = dest;
10032 addend = 0;
10033 }
10034 }
10035
10036 /* If the branch is out of reach we ought to have a long
10037 branch stub. */
10038 from = (rel->r_offset
10039 + input_section->output_offset
10040 + input_section->output_section->vma);
10041
10042 if (stub_entry == NULL
10043 && (relocation + rel->r_addend - from + max_br_offset
10044 >= 2 * max_br_offset)
10045 && r_type != R_PPC64_ADDR14_BRTAKEN
10046 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10047 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10048 htab);
10049
10050 if (stub_entry != NULL)
10051 {
10052 /* Munge up the value and addend so that we call the stub
10053 rather than the procedure directly. */
10054 relocation = (stub_entry->stub_offset
10055 + stub_entry->stub_sec->output_offset
10056 + stub_entry->stub_sec->output_section->vma);
10057 addend = 0;
10058 }
10059
10060 if (insn != 0)
10061 {
10062 if (is_power4)
10063 {
10064 /* Set 'a' bit. This is 0b00010 in BO field for branch
10065 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10066 for branch on CTR insns (BO == 1a00t or 1a01t). */
10067 if ((insn & (0x14 << 21)) == (0x04 << 21))
10068 insn |= 0x02 << 21;
10069 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10070 insn |= 0x08 << 21;
10071 else
10072 break;
10073 }
10074 else
10075 {
10076 /* Invert 'y' bit if not the default. */
10077 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
10078 insn ^= 0x01 << 21;
10079 }
10080
10081 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10082 }
10083
10084 /* NOP out calls to undefined weak functions.
10085 We can thus call a weak function without first
10086 checking whether the function is defined. */
10087 else if (h != NULL
10088 && h->elf.root.type == bfd_link_hash_undefweak
10089 && r_type == R_PPC64_REL24
10090 && relocation == 0
10091 && rel->r_addend == 0)
10092 {
10093 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10094 continue;
10095 }
10096 break;
10097 }
10098
10099 /* Set `addend'. */
10100 tls_type = 0;
10101 switch (r_type)
10102 {
10103 default:
10104 (*_bfd_error_handler)
10105 (_("%B: unknown relocation type %d for symbol %s"),
10106 input_bfd, (int) r_type, sym_name);
10107
10108 bfd_set_error (bfd_error_bad_value);
10109 ret = FALSE;
10110 continue;
10111
10112 case R_PPC64_NONE:
10113 case R_PPC64_TLS:
10114 case R_PPC64_GNU_VTINHERIT:
10115 case R_PPC64_GNU_VTENTRY:
10116 continue;
10117
10118 /* GOT16 relocations. Like an ADDR16 using the symbol's
10119 address in the GOT as relocation value instead of the
10120 symbol's value itself. Also, create a GOT entry for the
10121 symbol and put the symbol value there. */
10122 case R_PPC64_GOT_TLSGD16:
10123 case R_PPC64_GOT_TLSGD16_LO:
10124 case R_PPC64_GOT_TLSGD16_HI:
10125 case R_PPC64_GOT_TLSGD16_HA:
10126 tls_type = TLS_TLS | TLS_GD;
10127 goto dogot;
10128
10129 case R_PPC64_GOT_TLSLD16:
10130 case R_PPC64_GOT_TLSLD16_LO:
10131 case R_PPC64_GOT_TLSLD16_HI:
10132 case R_PPC64_GOT_TLSLD16_HA:
10133 tls_type = TLS_TLS | TLS_LD;
10134 goto dogot;
10135
10136 case R_PPC64_GOT_TPREL16_DS:
10137 case R_PPC64_GOT_TPREL16_LO_DS:
10138 case R_PPC64_GOT_TPREL16_HI:
10139 case R_PPC64_GOT_TPREL16_HA:
10140 tls_type = TLS_TLS | TLS_TPREL;
10141 goto dogot;
10142
10143 case R_PPC64_GOT_DTPREL16_DS:
10144 case R_PPC64_GOT_DTPREL16_LO_DS:
10145 case R_PPC64_GOT_DTPREL16_HI:
10146 case R_PPC64_GOT_DTPREL16_HA:
10147 tls_type = TLS_TLS | TLS_DTPREL;
10148 goto dogot;
10149
10150 case R_PPC64_GOT16:
10151 case R_PPC64_GOT16_LO:
10152 case R_PPC64_GOT16_HI:
10153 case R_PPC64_GOT16_HA:
10154 case R_PPC64_GOT16_DS:
10155 case R_PPC64_GOT16_LO_DS:
10156 dogot:
10157 {
10158 /* Relocation is to the entry for this symbol in the global
10159 offset table. */
10160 asection *got;
10161 bfd_vma *offp;
10162 bfd_vma off;
10163 unsigned long indx = 0;
10164
10165 if (tls_type == (TLS_TLS | TLS_LD)
10166 && (h == NULL
10167 || !h->elf.def_dynamic))
10168 offp = &ppc64_tlsld_got (input_bfd)->offset;
10169 else
10170 {
10171 struct got_entry *ent;
10172
10173 if (h != NULL)
10174 {
10175 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10176 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10177 &h->elf)
10178 || (info->shared
10179 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10180 /* This is actually a static link, or it is a
10181 -Bsymbolic link and the symbol is defined
10182 locally, or the symbol was forced to be local
10183 because of a version file. */
10184 ;
10185 else
10186 {
10187 indx = h->elf.dynindx;
10188 unresolved_reloc = FALSE;
10189 }
10190 ent = h->elf.got.glist;
10191 }
10192 else
10193 {
10194 if (local_got_ents == NULL)
10195 abort ();
10196 ent = local_got_ents[r_symndx];
10197 }
10198
10199 for (; ent != NULL; ent = ent->next)
10200 if (ent->addend == rel->r_addend
10201 && ent->owner == input_bfd
10202 && ent->tls_type == tls_type)
10203 break;
10204 if (ent == NULL)
10205 abort ();
10206 offp = &ent->got.offset;
10207 }
10208
10209 got = ppc64_elf_tdata (input_bfd)->got;
10210 if (got == NULL)
10211 abort ();
10212
10213 /* The offset must always be a multiple of 8. We use the
10214 least significant bit to record whether we have already
10215 processed this entry. */
10216 off = *offp;
10217 if ((off & 1) != 0)
10218 off &= ~1;
10219 else
10220 {
10221 /* Generate relocs for the dynamic linker, except in
10222 the case of TLSLD where we'll use one entry per
10223 module. */
10224 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10225
10226 *offp = off | 1;
10227 if ((info->shared || indx != 0)
10228 && (h == NULL
10229 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10230 || h->elf.root.type != bfd_link_hash_undefweak))
10231 {
10232 outrel.r_offset = (got->output_section->vma
10233 + got->output_offset
10234 + off);
10235 outrel.r_addend = rel->r_addend;
10236 if (tls_type & (TLS_LD | TLS_GD))
10237 {
10238 outrel.r_addend = 0;
10239 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10240 if (tls_type == (TLS_TLS | TLS_GD))
10241 {
10242 loc = relgot->contents;
10243 loc += (relgot->reloc_count++
10244 * sizeof (Elf64_External_Rela));
10245 bfd_elf64_swap_reloca_out (output_bfd,
10246 &outrel, loc);
10247 outrel.r_offset += 8;
10248 outrel.r_addend = rel->r_addend;
10249 outrel.r_info
10250 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10251 }
10252 }
10253 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10254 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10255 else if (tls_type == (TLS_TLS | TLS_TPREL))
10256 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10257 else if (indx == 0)
10258 {
10259 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10260
10261 /* Write the .got section contents for the sake
10262 of prelink. */
10263 loc = got->contents + off;
10264 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10265 loc);
10266 }
10267 else
10268 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10269
10270 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10271 {
10272 outrel.r_addend += relocation;
10273 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10274 outrel.r_addend -= htab->elf.tls_sec->vma;
10275 }
10276 loc = relgot->contents;
10277 loc += (relgot->reloc_count++
10278 * sizeof (Elf64_External_Rela));
10279 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10280 }
10281
10282 /* Init the .got section contents here if we're not
10283 emitting a reloc. */
10284 else
10285 {
10286 relocation += rel->r_addend;
10287 if (tls_type == (TLS_TLS | TLS_LD))
10288 relocation = 1;
10289 else if (tls_type != 0)
10290 {
10291 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10292 if (tls_type == (TLS_TLS | TLS_TPREL))
10293 relocation += DTP_OFFSET - TP_OFFSET;
10294
10295 if (tls_type == (TLS_TLS | TLS_GD))
10296 {
10297 bfd_put_64 (output_bfd, relocation,
10298 got->contents + off + 8);
10299 relocation = 1;
10300 }
10301 }
10302
10303 bfd_put_64 (output_bfd, relocation,
10304 got->contents + off);
10305 }
10306 }
10307
10308 if (off >= (bfd_vma) -2)
10309 abort ();
10310
10311 relocation = got->output_offset + off;
10312
10313 /* TOC base (r2) is TOC start plus 0x8000. */
10314 addend = -TOC_BASE_OFF;
10315 }
10316 break;
10317
10318 case R_PPC64_PLT16_HA:
10319 case R_PPC64_PLT16_HI:
10320 case R_PPC64_PLT16_LO:
10321 case R_PPC64_PLT32:
10322 case R_PPC64_PLT64:
10323 /* Relocation is to the entry for this symbol in the
10324 procedure linkage table. */
10325
10326 /* Resolve a PLT reloc against a local symbol directly,
10327 without using the procedure linkage table. */
10328 if (h == NULL)
10329 break;
10330
10331 /* It's possible that we didn't make a PLT entry for this
10332 symbol. This happens when statically linking PIC code,
10333 or when using -Bsymbolic. Go find a match if there is a
10334 PLT entry. */
10335 if (htab->plt != NULL)
10336 {
10337 struct plt_entry *ent;
10338 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10339 if (ent->addend == rel->r_addend
10340 && ent->plt.offset != (bfd_vma) -1)
10341 {
10342 relocation = (htab->plt->output_section->vma
10343 + htab->plt->output_offset
10344 + ent->plt.offset);
10345 unresolved_reloc = FALSE;
10346 }
10347 }
10348 break;
10349
10350 case R_PPC64_TOC:
10351 /* Relocation value is TOC base. */
10352 relocation = TOCstart;
10353 if (r_symndx == 0)
10354 relocation += htab->stub_group[input_section->id].toc_off;
10355 else if (unresolved_reloc)
10356 ;
10357 else if (sec != NULL && sec->id <= htab->top_id)
10358 relocation += htab->stub_group[sec->id].toc_off;
10359 else
10360 unresolved_reloc = TRUE;
10361 goto dodyn2;
10362
10363 /* TOC16 relocs. We want the offset relative to the TOC base,
10364 which is the address of the start of the TOC plus 0x8000.
10365 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10366 in this order. */
10367 case R_PPC64_TOC16:
10368 case R_PPC64_TOC16_LO:
10369 case R_PPC64_TOC16_HI:
10370 case R_PPC64_TOC16_DS:
10371 case R_PPC64_TOC16_LO_DS:
10372 case R_PPC64_TOC16_HA:
10373 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10374 break;
10375
10376 /* Relocate against the beginning of the section. */
10377 case R_PPC64_SECTOFF:
10378 case R_PPC64_SECTOFF_LO:
10379 case R_PPC64_SECTOFF_HI:
10380 case R_PPC64_SECTOFF_DS:
10381 case R_PPC64_SECTOFF_LO_DS:
10382 case R_PPC64_SECTOFF_HA:
10383 if (sec != NULL)
10384 addend -= sec->output_section->vma;
10385 break;
10386
10387 case R_PPC64_REL14:
10388 case R_PPC64_REL14_BRNTAKEN:
10389 case R_PPC64_REL14_BRTAKEN:
10390 case R_PPC64_REL24:
10391 break;
10392
10393 case R_PPC64_TPREL16:
10394 case R_PPC64_TPREL16_LO:
10395 case R_PPC64_TPREL16_HI:
10396 case R_PPC64_TPREL16_HA:
10397 case R_PPC64_TPREL16_DS:
10398 case R_PPC64_TPREL16_LO_DS:
10399 case R_PPC64_TPREL16_HIGHER:
10400 case R_PPC64_TPREL16_HIGHERA:
10401 case R_PPC64_TPREL16_HIGHEST:
10402 case R_PPC64_TPREL16_HIGHESTA:
10403 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10404 if (info->shared)
10405 /* The TPREL16 relocs shouldn't really be used in shared
10406 libs as they will result in DT_TEXTREL being set, but
10407 support them anyway. */
10408 goto dodyn;
10409 break;
10410
10411 case R_PPC64_DTPREL16:
10412 case R_PPC64_DTPREL16_LO:
10413 case R_PPC64_DTPREL16_HI:
10414 case R_PPC64_DTPREL16_HA:
10415 case R_PPC64_DTPREL16_DS:
10416 case R_PPC64_DTPREL16_LO_DS:
10417 case R_PPC64_DTPREL16_HIGHER:
10418 case R_PPC64_DTPREL16_HIGHERA:
10419 case R_PPC64_DTPREL16_HIGHEST:
10420 case R_PPC64_DTPREL16_HIGHESTA:
10421 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10422 break;
10423
10424 case R_PPC64_DTPMOD64:
10425 relocation = 1;
10426 addend = 0;
10427 goto dodyn;
10428
10429 case R_PPC64_TPREL64:
10430 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10431 goto dodyn;
10432
10433 case R_PPC64_DTPREL64:
10434 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10435 /* Fall thru */
10436
10437 /* Relocations that may need to be propagated if this is a
10438 dynamic object. */
10439 case R_PPC64_REL30:
10440 case R_PPC64_REL32:
10441 case R_PPC64_REL64:
10442 case R_PPC64_ADDR14:
10443 case R_PPC64_ADDR14_BRNTAKEN:
10444 case R_PPC64_ADDR14_BRTAKEN:
10445 case R_PPC64_ADDR16:
10446 case R_PPC64_ADDR16_DS:
10447 case R_PPC64_ADDR16_HA:
10448 case R_PPC64_ADDR16_HI:
10449 case R_PPC64_ADDR16_HIGHER:
10450 case R_PPC64_ADDR16_HIGHERA:
10451 case R_PPC64_ADDR16_HIGHEST:
10452 case R_PPC64_ADDR16_HIGHESTA:
10453 case R_PPC64_ADDR16_LO:
10454 case R_PPC64_ADDR16_LO_DS:
10455 case R_PPC64_ADDR24:
10456 case R_PPC64_ADDR32:
10457 case R_PPC64_ADDR64:
10458 case R_PPC64_UADDR16:
10459 case R_PPC64_UADDR32:
10460 case R_PPC64_UADDR64:
10461 /* r_symndx will be zero only for relocs against symbols
10462 from removed linkonce sections, or sections discarded by
10463 a linker script. */
10464 dodyn:
10465 if (r_symndx == 0)
10466 break;
10467 /* Fall thru. */
10468
10469 dodyn2:
10470 if ((input_section->flags & SEC_ALLOC) == 0)
10471 break;
10472
10473 if (NO_OPD_RELOCS && is_opd)
10474 break;
10475
10476 if ((info->shared
10477 && (h == NULL
10478 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10479 || h->elf.root.type != bfd_link_hash_undefweak)
10480 && (MUST_BE_DYN_RELOC (r_type)
10481 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10482 || (ELIMINATE_COPY_RELOCS
10483 && !info->shared
10484 && h != NULL
10485 && h->elf.dynindx != -1
10486 && !h->elf.non_got_ref
10487 && h->elf.def_dynamic
10488 && !h->elf.def_regular))
10489 {
10490 Elf_Internal_Rela outrel;
10491 bfd_boolean skip, relocate;
10492 asection *sreloc;
10493 bfd_byte *loc;
10494 bfd_vma out_off;
10495
10496 /* When generating a dynamic object, these relocations
10497 are copied into the output file to be resolved at run
10498 time. */
10499
10500 skip = FALSE;
10501 relocate = FALSE;
10502
10503 out_off = _bfd_elf_section_offset (output_bfd, info,
10504 input_section, rel->r_offset);
10505 if (out_off == (bfd_vma) -1)
10506 skip = TRUE;
10507 else if (out_off == (bfd_vma) -2)
10508 skip = TRUE, relocate = TRUE;
10509 out_off += (input_section->output_section->vma
10510 + input_section->output_offset);
10511 outrel.r_offset = out_off;
10512 outrel.r_addend = rel->r_addend;
10513
10514 /* Optimize unaligned reloc use. */
10515 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10516 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10517 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10518 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10519 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10520 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10521 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10522 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10523 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10524
10525 if (skip)
10526 memset (&outrel, 0, sizeof outrel);
10527 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10528 && !is_opd
10529 && r_type != R_PPC64_TOC)
10530 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10531 else
10532 {
10533 /* This symbol is local, or marked to become local,
10534 or this is an opd section reloc which must point
10535 at a local function. */
10536 outrel.r_addend += relocation;
10537 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10538 {
10539 if (is_opd && h != NULL)
10540 {
10541 /* Lie about opd entries. This case occurs
10542 when building shared libraries and we
10543 reference a function in another shared
10544 lib. The same thing happens for a weak
10545 definition in an application that's
10546 overridden by a strong definition in a
10547 shared lib. (I believe this is a generic
10548 bug in binutils handling of weak syms.)
10549 In these cases we won't use the opd
10550 entry in this lib. */
10551 unresolved_reloc = FALSE;
10552 }
10553 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10554
10555 /* We need to relocate .opd contents for ld.so.
10556 Prelink also wants simple and consistent rules
10557 for relocs. This make all RELATIVE relocs have
10558 *r_offset equal to r_addend. */
10559 relocate = TRUE;
10560 }
10561 else
10562 {
10563 long indx = 0;
10564
10565 if (bfd_is_abs_section (sec))
10566 ;
10567 else if (sec == NULL || sec->owner == NULL)
10568 {
10569 bfd_set_error (bfd_error_bad_value);
10570 return FALSE;
10571 }
10572 else
10573 {
10574 asection *osec;
10575
10576 osec = sec->output_section;
10577 indx = elf_section_data (osec)->dynindx;
10578
10579 /* We are turning this relocation into one
10580 against a section symbol, so subtract out
10581 the output section's address but not the
10582 offset of the input section in the output
10583 section. */
10584 outrel.r_addend -= osec->vma;
10585 }
10586
10587 outrel.r_info = ELF64_R_INFO (indx, r_type);
10588 }
10589 }
10590
10591 sreloc = elf_section_data (input_section)->sreloc;
10592 if (sreloc == NULL)
10593 abort ();
10594
10595 loc = sreloc->contents;
10596 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10597 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10598
10599 /* If this reloc is against an external symbol, it will
10600 be computed at runtime, so there's no need to do
10601 anything now. However, for the sake of prelink ensure
10602 that the section contents are a known value. */
10603 if (! relocate)
10604 {
10605 unresolved_reloc = FALSE;
10606 /* The value chosen here is quite arbitrary as ld.so
10607 ignores section contents except for the special
10608 case of .opd where the contents might be accessed
10609 before relocation. Choose zero, as that won't
10610 cause reloc overflow. */
10611 relocation = 0;
10612 addend = 0;
10613 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10614 to improve backward compatibility with older
10615 versions of ld. */
10616 if (r_type == R_PPC64_ADDR64)
10617 addend = outrel.r_addend;
10618 /* Adjust pc_relative relocs to have zero in *r_offset. */
10619 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10620 addend = (input_section->output_section->vma
10621 + input_section->output_offset
10622 + rel->r_offset);
10623 }
10624 }
10625 break;
10626
10627 case R_PPC64_COPY:
10628 case R_PPC64_GLOB_DAT:
10629 case R_PPC64_JMP_SLOT:
10630 case R_PPC64_RELATIVE:
10631 /* We shouldn't ever see these dynamic relocs in relocatable
10632 files. */
10633 /* Fall through. */
10634
10635 case R_PPC64_PLTGOT16:
10636 case R_PPC64_PLTGOT16_DS:
10637 case R_PPC64_PLTGOT16_HA:
10638 case R_PPC64_PLTGOT16_HI:
10639 case R_PPC64_PLTGOT16_LO:
10640 case R_PPC64_PLTGOT16_LO_DS:
10641 case R_PPC64_PLTREL32:
10642 case R_PPC64_PLTREL64:
10643 /* These ones haven't been implemented yet. */
10644
10645 (*_bfd_error_handler)
10646 (_("%B: relocation %s is not supported for symbol %s."),
10647 input_bfd,
10648 ppc64_elf_howto_table[r_type]->name, sym_name);
10649
10650 bfd_set_error (bfd_error_invalid_operation);
10651 ret = FALSE;
10652 continue;
10653 }
10654
10655 /* Do any further special processing. */
10656 switch (r_type)
10657 {
10658 default:
10659 break;
10660
10661 case R_PPC64_ADDR16_HA:
10662 case R_PPC64_ADDR16_HIGHERA:
10663 case R_PPC64_ADDR16_HIGHESTA:
10664 case R_PPC64_GOT16_HA:
10665 case R_PPC64_PLTGOT16_HA:
10666 case R_PPC64_PLT16_HA:
10667 case R_PPC64_TOC16_HA:
10668 case R_PPC64_SECTOFF_HA:
10669 case R_PPC64_TPREL16_HA:
10670 case R_PPC64_DTPREL16_HA:
10671 case R_PPC64_GOT_TLSGD16_HA:
10672 case R_PPC64_GOT_TLSLD16_HA:
10673 case R_PPC64_GOT_TPREL16_HA:
10674 case R_PPC64_GOT_DTPREL16_HA:
10675 case R_PPC64_TPREL16_HIGHER:
10676 case R_PPC64_TPREL16_HIGHERA:
10677 case R_PPC64_TPREL16_HIGHEST:
10678 case R_PPC64_TPREL16_HIGHESTA:
10679 case R_PPC64_DTPREL16_HIGHER:
10680 case R_PPC64_DTPREL16_HIGHERA:
10681 case R_PPC64_DTPREL16_HIGHEST:
10682 case R_PPC64_DTPREL16_HIGHESTA:
10683 /* It's just possible that this symbol is a weak symbol
10684 that's not actually defined anywhere. In that case,
10685 'sec' would be NULL, and we should leave the symbol
10686 alone (it will be set to zero elsewhere in the link). */
10687 if (sec != NULL)
10688 /* Add 0x10000 if sign bit in 0:15 is set.
10689 Bits 0:15 are not used. */
10690 addend += 0x8000;
10691 break;
10692
10693 case R_PPC64_ADDR16_DS:
10694 case R_PPC64_ADDR16_LO_DS:
10695 case R_PPC64_GOT16_DS:
10696 case R_PPC64_GOT16_LO_DS:
10697 case R_PPC64_PLT16_LO_DS:
10698 case R_PPC64_SECTOFF_DS:
10699 case R_PPC64_SECTOFF_LO_DS:
10700 case R_PPC64_TOC16_DS:
10701 case R_PPC64_TOC16_LO_DS:
10702 case R_PPC64_PLTGOT16_DS:
10703 case R_PPC64_PLTGOT16_LO_DS:
10704 case R_PPC64_GOT_TPREL16_DS:
10705 case R_PPC64_GOT_TPREL16_LO_DS:
10706 case R_PPC64_GOT_DTPREL16_DS:
10707 case R_PPC64_GOT_DTPREL16_LO_DS:
10708 case R_PPC64_TPREL16_DS:
10709 case R_PPC64_TPREL16_LO_DS:
10710 case R_PPC64_DTPREL16_DS:
10711 case R_PPC64_DTPREL16_LO_DS:
10712 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10713 mask = 3;
10714 /* If this reloc is against an lq insn, then the value must be
10715 a multiple of 16. This is somewhat of a hack, but the
10716 "correct" way to do this by defining _DQ forms of all the
10717 _DS relocs bloats all reloc switches in this file. It
10718 doesn't seem to make much sense to use any of these relocs
10719 in data, so testing the insn should be safe. */
10720 if ((insn & (0x3f << 26)) == (56u << 26))
10721 mask = 15;
10722 if (((relocation + addend) & mask) != 0)
10723 {
10724 (*_bfd_error_handler)
10725 (_("%B: error: relocation %s not a multiple of %d"),
10726 input_bfd,
10727 ppc64_elf_howto_table[r_type]->name,
10728 mask + 1);
10729 bfd_set_error (bfd_error_bad_value);
10730 ret = FALSE;
10731 continue;
10732 }
10733 break;
10734 }
10735
10736 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10737 because such sections are not SEC_ALLOC and thus ld.so will
10738 not process them. */
10739 if (unresolved_reloc
10740 && !((input_section->flags & SEC_DEBUGGING) != 0
10741 && h->elf.def_dynamic))
10742 {
10743 (*_bfd_error_handler)
10744 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10745 input_bfd,
10746 input_section,
10747 (long) rel->r_offset,
10748 ppc64_elf_howto_table[(int) r_type]->name,
10749 h->elf.root.root.string);
10750 ret = FALSE;
10751 }
10752
10753 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10754 input_bfd,
10755 input_section,
10756 contents,
10757 rel->r_offset,
10758 relocation,
10759 addend);
10760
10761 if (r != bfd_reloc_ok)
10762 {
10763 if (sym_name == NULL)
10764 sym_name = "(null)";
10765 if (r == bfd_reloc_overflow)
10766 {
10767 if (warned)
10768 continue;
10769 if (h != NULL
10770 && h->elf.root.type == bfd_link_hash_undefweak
10771 && ppc64_elf_howto_table[r_type]->pc_relative)
10772 {
10773 /* Assume this is a call protected by other code that
10774 detects the symbol is undefined. If this is the case,
10775 we can safely ignore the overflow. If not, the
10776 program is hosed anyway, and a little warning isn't
10777 going to help. */
10778
10779 continue;
10780 }
10781
10782 if (!((*info->callbacks->reloc_overflow)
10783 (info, (h ? &h->elf.root : NULL), sym_name,
10784 ppc64_elf_howto_table[r_type]->name,
10785 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10786 return FALSE;
10787 }
10788 else
10789 {
10790 (*_bfd_error_handler)
10791 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10792 input_bfd,
10793 input_section,
10794 (long) rel->r_offset,
10795 ppc64_elf_howto_table[r_type]->name,
10796 sym_name,
10797 (int) r);
10798 ret = FALSE;
10799 }
10800 }
10801 }
10802
10803 /* If we're emitting relocations, then shortly after this function
10804 returns, reloc offsets and addends for this section will be
10805 adjusted. Worse, reloc symbol indices will be for the output
10806 file rather than the input. Save a copy of the relocs for
10807 opd_entry_value. */
10808 if (is_opd && info->emitrelocations)
10809 {
10810 bfd_size_type amt;
10811 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10812 rel = bfd_alloc (input_bfd, amt);
10813 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10814 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10815 if (rel == NULL)
10816 return FALSE;
10817 memcpy (rel, relocs, amt);
10818 }
10819 return ret;
10820 }
10821
10822 /* Adjust the value of any local symbols in opd sections. */
10823
10824 static bfd_boolean
10825 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10826 const char *name ATTRIBUTE_UNUSED,
10827 Elf_Internal_Sym *elfsym,
10828 asection *input_sec,
10829 struct elf_link_hash_entry *h)
10830 {
10831 long *opd_adjust, adjust;
10832 bfd_vma value;
10833
10834 if (h != NULL)
10835 return TRUE;
10836
10837 opd_adjust = get_opd_info (input_sec);
10838 if (opd_adjust == NULL)
10839 return TRUE;
10840
10841 value = elfsym->st_value - input_sec->output_offset;
10842 if (!info->relocatable)
10843 value -= input_sec->output_section->vma;
10844
10845 adjust = opd_adjust[value / 8];
10846 if (adjust == -1)
10847 elfsym->st_value = 0;
10848 else
10849 elfsym->st_value += adjust;
10850 return TRUE;
10851 }
10852
10853 /* Finish up dynamic symbol handling. We set the contents of various
10854 dynamic sections here. */
10855
10856 static bfd_boolean
10857 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10858 struct bfd_link_info *info,
10859 struct elf_link_hash_entry *h,
10860 Elf_Internal_Sym *sym)
10861 {
10862 struct ppc_link_hash_table *htab;
10863 bfd *dynobj;
10864 struct plt_entry *ent;
10865 Elf_Internal_Rela rela;
10866 bfd_byte *loc;
10867
10868 htab = ppc_hash_table (info);
10869 dynobj = htab->elf.dynobj;
10870
10871 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10872 if (ent->plt.offset != (bfd_vma) -1)
10873 {
10874 /* This symbol has an entry in the procedure linkage
10875 table. Set it up. */
10876
10877 if (htab->plt == NULL
10878 || htab->relplt == NULL
10879 || htab->glink == NULL)
10880 abort ();
10881
10882 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10883 fill in the PLT entry. */
10884 rela.r_offset = (htab->plt->output_section->vma
10885 + htab->plt->output_offset
10886 + ent->plt.offset);
10887 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10888 rela.r_addend = ent->addend;
10889
10890 loc = htab->relplt->contents;
10891 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10892 * sizeof (Elf64_External_Rela));
10893 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10894 }
10895
10896 if (h->needs_copy)
10897 {
10898 Elf_Internal_Rela rela;
10899 bfd_byte *loc;
10900
10901 /* This symbol needs a copy reloc. Set it up. */
10902
10903 if (h->dynindx == -1
10904 || (h->root.type != bfd_link_hash_defined
10905 && h->root.type != bfd_link_hash_defweak)
10906 || htab->relbss == NULL)
10907 abort ();
10908
10909 rela.r_offset = (h->root.u.def.value
10910 + h->root.u.def.section->output_section->vma
10911 + h->root.u.def.section->output_offset);
10912 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10913 rela.r_addend = 0;
10914 loc = htab->relbss->contents;
10915 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10916 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10917 }
10918
10919 /* Mark some specially defined symbols as absolute. */
10920 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10921 sym->st_shndx = SHN_ABS;
10922
10923 return TRUE;
10924 }
10925
10926 /* Used to decide how to sort relocs in an optimal manner for the
10927 dynamic linker, before writing them out. */
10928
10929 static enum elf_reloc_type_class
10930 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10931 {
10932 enum elf_ppc64_reloc_type r_type;
10933
10934 r_type = ELF64_R_TYPE (rela->r_info);
10935 switch (r_type)
10936 {
10937 case R_PPC64_RELATIVE:
10938 return reloc_class_relative;
10939 case R_PPC64_JMP_SLOT:
10940 return reloc_class_plt;
10941 case R_PPC64_COPY:
10942 return reloc_class_copy;
10943 default:
10944 return reloc_class_normal;
10945 }
10946 }
10947
10948 /* Finish up the dynamic sections. */
10949
10950 static bfd_boolean
10951 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10952 struct bfd_link_info *info)
10953 {
10954 struct ppc_link_hash_table *htab;
10955 bfd *dynobj;
10956 asection *sdyn;
10957
10958 htab = ppc_hash_table (info);
10959 dynobj = htab->elf.dynobj;
10960 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10961
10962 if (htab->elf.dynamic_sections_created)
10963 {
10964 Elf64_External_Dyn *dyncon, *dynconend;
10965
10966 if (sdyn == NULL || htab->got == NULL)
10967 abort ();
10968
10969 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10970 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10971 for (; dyncon < dynconend; dyncon++)
10972 {
10973 Elf_Internal_Dyn dyn;
10974 asection *s;
10975
10976 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
10977
10978 switch (dyn.d_tag)
10979 {
10980 default:
10981 continue;
10982
10983 case DT_PPC64_GLINK:
10984 s = htab->glink;
10985 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10986 /* We stupidly defined DT_PPC64_GLINK to be the start
10987 of glink rather than the first entry point, which is
10988 what ld.so needs, and now have a bigger stub to
10989 support automatic multiple TOCs. */
10990 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
10991 break;
10992
10993 case DT_PPC64_OPD:
10994 s = bfd_get_section_by_name (output_bfd, ".opd");
10995 if (s == NULL)
10996 continue;
10997 dyn.d_un.d_ptr = s->vma;
10998 break;
10999
11000 case DT_PPC64_OPDSZ:
11001 s = bfd_get_section_by_name (output_bfd, ".opd");
11002 if (s == NULL)
11003 continue;
11004 dyn.d_un.d_val = s->size;
11005 break;
11006
11007 case DT_PLTGOT:
11008 s = htab->plt;
11009 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11010 break;
11011
11012 case DT_JMPREL:
11013 s = htab->relplt;
11014 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11015 break;
11016
11017 case DT_PLTRELSZ:
11018 dyn.d_un.d_val = htab->relplt->size;
11019 break;
11020
11021 case DT_RELASZ:
11022 /* Don't count procedure linkage table relocs in the
11023 overall reloc count. */
11024 s = htab->relplt;
11025 if (s == NULL)
11026 continue;
11027 dyn.d_un.d_val -= s->size;
11028 break;
11029
11030 case DT_RELA:
11031 /* We may not be using the standard ELF linker script.
11032 If .rela.plt is the first .rela section, we adjust
11033 DT_RELA to not include it. */
11034 s = htab->relplt;
11035 if (s == NULL)
11036 continue;
11037 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11038 continue;
11039 dyn.d_un.d_ptr += s->size;
11040 break;
11041 }
11042
11043 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11044 }
11045 }
11046
11047 if (htab->got != NULL && htab->got->size != 0)
11048 {
11049 /* Fill in the first entry in the global offset table.
11050 We use it to hold the link-time TOCbase. */
11051 bfd_put_64 (output_bfd,
11052 elf_gp (output_bfd) + TOC_BASE_OFF,
11053 htab->got->contents);
11054
11055 /* Set .got entry size. */
11056 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11057 }
11058
11059 if (htab->plt != NULL && htab->plt->size != 0)
11060 {
11061 /* Set .plt entry size. */
11062 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11063 = PLT_ENTRY_SIZE;
11064 }
11065
11066 /* We need to handle writing out multiple GOT sections ourselves,
11067 since we didn't add them to DYNOBJ. We know dynobj is the first
11068 bfd. */
11069 while ((dynobj = dynobj->link_next) != NULL)
11070 {
11071 asection *s;
11072
11073 if (!is_ppc64_elf_target (dynobj->xvec))
11074 continue;
11075
11076 s = ppc64_elf_tdata (dynobj)->got;
11077 if (s != NULL
11078 && s->size != 0
11079 && s->output_section != bfd_abs_section_ptr
11080 && !bfd_set_section_contents (output_bfd, s->output_section,
11081 s->contents, s->output_offset,
11082 s->size))
11083 return FALSE;
11084 s = ppc64_elf_tdata (dynobj)->relgot;
11085 if (s != NULL
11086 && s->size != 0
11087 && s->output_section != bfd_abs_section_ptr
11088 && !bfd_set_section_contents (output_bfd, s->output_section,
11089 s->contents, s->output_offset,
11090 s->size))
11091 return FALSE;
11092 }
11093
11094 return TRUE;
11095 }
11096
11097 #include "elf64-target.h"