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* elf64-alpha.c (elf64_alpha_create_got_section): Always create
[deliverable/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 union {
2373 /* Used during garbage collection. We attach global symbols defined
2374 on removed .opd entries to this section so that the sym is removed. */
2375 asection *deleted_section;
2376
2377 /* Used when adding symbols. */
2378 bfd_boolean has_dotsym;
2379 } u;
2380
2381 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2382 sections means we potentially need one of these for each input bfd. */
2383 union {
2384 bfd_signed_vma refcount;
2385 bfd_vma offset;
2386 } tlsld_got;
2387
2388 /* A copy of relocs before they are modified for --emit-relocs. */
2389 Elf_Internal_Rela *opd_relocs;
2390 };
2391
2392 #define ppc64_elf_tdata(bfd) \
2393 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2394
2395 #define ppc64_tlsld_got(bfd) \
2396 (&ppc64_elf_tdata (bfd)->tlsld_got)
2397
2398 /* Override the generic function because we store some extras. */
2399
2400 static bfd_boolean
2401 ppc64_elf_mkobject (bfd *abfd)
2402 {
2403 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2404 abfd->tdata.any = bfd_zalloc (abfd, amt);
2405 if (abfd->tdata.any == NULL)
2406 return FALSE;
2407 return TRUE;
2408 }
2409
2410 /* Return 1 if target is one of ours. */
2411
2412 static bfd_boolean
2413 is_ppc64_elf_target (const struct bfd_target *targ)
2414 {
2415 extern const bfd_target bfd_elf64_powerpc_vec;
2416 extern const bfd_target bfd_elf64_powerpcle_vec;
2417
2418 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2419 }
2420
2421 /* Fix bad default arch selected for a 64 bit input bfd when the
2422 default is 32 bit. */
2423
2424 static bfd_boolean
2425 ppc64_elf_object_p (bfd *abfd)
2426 {
2427 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2428 {
2429 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2430
2431 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2432 {
2433 /* Relies on arch after 32 bit default being 64 bit default. */
2434 abfd->arch_info = abfd->arch_info->next;
2435 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2436 }
2437 }
2438 return TRUE;
2439 }
2440
2441 /* Support for core dump NOTE sections. */
2442
2443 static bfd_boolean
2444 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2445 {
2446 size_t offset, size;
2447
2448 if (note->descsz != 504)
2449 return FALSE;
2450
2451 /* pr_cursig */
2452 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2453
2454 /* pr_pid */
2455 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2456
2457 /* pr_reg */
2458 offset = 112;
2459 size = 384;
2460
2461 /* Make a ".reg/999" section. */
2462 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2463 size, note->descpos + offset);
2464 }
2465
2466 static bfd_boolean
2467 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2468 {
2469 if (note->descsz != 136)
2470 return FALSE;
2471
2472 elf_tdata (abfd)->core_program
2473 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2474 elf_tdata (abfd)->core_command
2475 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2476
2477 return TRUE;
2478 }
2479
2480 /* Merge backend specific data from an object file to the output
2481 object file when linking. */
2482
2483 static bfd_boolean
2484 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2485 {
2486 /* Check if we have the same endianess. */
2487 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2488 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2489 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2490 {
2491 const char *msg;
2492
2493 if (bfd_big_endian (ibfd))
2494 msg = _("%B: compiled for a big endian system "
2495 "and target is little endian");
2496 else
2497 msg = _("%B: compiled for a little endian system "
2498 "and target is big endian");
2499
2500 (*_bfd_error_handler) (msg, ibfd);
2501
2502 bfd_set_error (bfd_error_wrong_format);
2503 return FALSE;
2504 }
2505
2506 return TRUE;
2507 }
2508
2509 /* Add extra PPC sections. */
2510
2511 static struct bfd_elf_special_section const
2512 ppc64_special_sections_p[]=
2513 {
2514 { ".plt", 4, 0, SHT_NOBITS, 0 },
2515 { NULL, 0, 0, 0, 0 }
2516 };
2517
2518 static struct bfd_elf_special_section const
2519 ppc64_special_sections_s[]=
2520 {
2521 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2522 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2523 { NULL, 0, 0, 0, 0 }
2524 };
2525
2526 static struct bfd_elf_special_section const
2527 ppc64_special_sections_t[]=
2528 {
2529 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2530 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2531 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2532 { NULL, 0, 0, 0, 0 }
2533 };
2534
2535 static struct bfd_elf_special_section const *
2536 ppc64_elf_special_sections[27]=
2537 {
2538 NULL, /* 'a' */
2539 NULL, /* 'b' */
2540 NULL, /* 'c' */
2541 NULL, /* 'd' */
2542 NULL, /* 'e' */
2543 NULL, /* 'f' */
2544 NULL, /* 'g' */
2545 NULL, /* 'h' */
2546 NULL, /* 'i' */
2547 NULL, /* 'j' */
2548 NULL, /* 'k' */
2549 NULL, /* 'l' */
2550 NULL, /* 'm' */
2551 NULL, /* 'n' */
2552 NULL, /* 'o' */
2553 ppc64_special_sections_p, /* 'p' */
2554 NULL, /* 'q' */
2555 NULL, /* 'r' */
2556 ppc64_special_sections_s, /* 's' */
2557 ppc64_special_sections_t, /* 't' */
2558 NULL, /* 'u' */
2559 NULL, /* 'v' */
2560 NULL, /* 'w' */
2561 NULL, /* 'x' */
2562 NULL, /* 'y' */
2563 NULL, /* 'z' */
2564 NULL /* other */
2565 };
2566
2567 struct _ppc64_elf_section_data
2568 {
2569 struct bfd_elf_section_data elf;
2570
2571 /* An array with one entry for each opd function descriptor. */
2572 union
2573 {
2574 /* Points to the function code section for local opd entries. */
2575 asection **func_sec;
2576 /* After editing .opd, adjust references to opd local syms. */
2577 long *adjust;
2578 } opd;
2579
2580 /* An array for toc sections, indexed by offset/8.
2581 Specifies the relocation symbol index used at a given toc offset. */
2582 unsigned *t_symndx;
2583 };
2584
2585 #define ppc64_elf_section_data(sec) \
2586 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2587
2588 static bfd_boolean
2589 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2590 {
2591 struct _ppc64_elf_section_data *sdata;
2592 bfd_size_type amt = sizeof (*sdata);
2593
2594 sdata = bfd_zalloc (abfd, amt);
2595 if (sdata == NULL)
2596 return FALSE;
2597 sec->used_by_bfd = sdata;
2598
2599 return _bfd_elf_new_section_hook (abfd, sec);
2600 }
2601
2602 static void *
2603 get_opd_info (asection * sec)
2604 {
2605 if (sec != NULL
2606 && ppc64_elf_section_data (sec) != NULL
2607 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2608 return ppc64_elf_section_data (sec)->opd.adjust;
2609 return NULL;
2610 }
2611 \f
2612 /* Parameters for the qsort hook. */
2613 static asection *synthetic_opd;
2614 static bfd_boolean synthetic_relocatable;
2615
2616 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2617
2618 static int
2619 compare_symbols (const void *ap, const void *bp)
2620 {
2621 const asymbol *a = * (const asymbol **) ap;
2622 const asymbol *b = * (const asymbol **) bp;
2623
2624 /* Section symbols first. */
2625 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2626 return -1;
2627 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2628 return 1;
2629
2630 /* then .opd symbols. */
2631 if (a->section == synthetic_opd && b->section != synthetic_opd)
2632 return -1;
2633 if (a->section != synthetic_opd && b->section == synthetic_opd)
2634 return 1;
2635
2636 /* then other code symbols. */
2637 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2638 == (SEC_CODE | SEC_ALLOC)
2639 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2640 != (SEC_CODE | SEC_ALLOC))
2641 return -1;
2642
2643 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2644 != (SEC_CODE | SEC_ALLOC)
2645 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2646 == (SEC_CODE | SEC_ALLOC))
2647 return 1;
2648
2649 if (synthetic_relocatable)
2650 {
2651 if (a->section->id < b->section->id)
2652 return -1;
2653
2654 if (a->section->id > b->section->id)
2655 return 1;
2656 }
2657
2658 if (a->value + a->section->vma < b->value + b->section->vma)
2659 return -1;
2660
2661 if (a->value + a->section->vma > b->value + b->section->vma)
2662 return 1;
2663
2664 return 0;
2665 }
2666
2667 /* Search SYMS for a symbol of the given VALUE. */
2668
2669 static asymbol *
2670 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2671 {
2672 long mid;
2673
2674 if (id == -1)
2675 {
2676 while (lo < hi)
2677 {
2678 mid = (lo + hi) >> 1;
2679 if (syms[mid]->value + syms[mid]->section->vma < value)
2680 lo = mid + 1;
2681 else if (syms[mid]->value + syms[mid]->section->vma > value)
2682 hi = mid;
2683 else
2684 return syms[mid];
2685 }
2686 }
2687 else
2688 {
2689 while (lo < hi)
2690 {
2691 mid = (lo + hi) >> 1;
2692 if (syms[mid]->section->id < id)
2693 lo = mid + 1;
2694 else if (syms[mid]->section->id > id)
2695 hi = mid;
2696 else if (syms[mid]->value < value)
2697 lo = mid + 1;
2698 else if (syms[mid]->value > value)
2699 hi = mid;
2700 else
2701 return syms[mid];
2702 }
2703 }
2704 return NULL;
2705 }
2706
2707 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2708 entry syms. */
2709
2710 static long
2711 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2712 long static_count, asymbol **static_syms,
2713 long dyn_count, asymbol **dyn_syms,
2714 asymbol **ret)
2715 {
2716 asymbol *s;
2717 long i;
2718 long count;
2719 char *names;
2720 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2721 asection *opd;
2722 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2723 asymbol **syms;
2724
2725 *ret = NULL;
2726
2727 opd = bfd_get_section_by_name (abfd, ".opd");
2728 if (opd == NULL)
2729 return 0;
2730
2731 symcount = static_count;
2732 if (!relocatable)
2733 symcount += dyn_count;
2734 if (symcount == 0)
2735 return 0;
2736
2737 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2738 if (syms == NULL)
2739 return -1;
2740
2741 if (!relocatable && static_count != 0 && dyn_count != 0)
2742 {
2743 /* Use both symbol tables. */
2744 memcpy (syms, static_syms, static_count * sizeof (*syms));
2745 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2746 }
2747 else if (!relocatable && static_count == 0)
2748 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2749 else
2750 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2751
2752 synthetic_opd = opd;
2753 synthetic_relocatable = relocatable;
2754 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2755
2756 if (!relocatable && symcount > 1)
2757 {
2758 long j;
2759 /* Trim duplicate syms, since we may have merged the normal and
2760 dynamic symbols. Actually, we only care about syms that have
2761 different values, so trim any with the same value. */
2762 for (i = 1, j = 1; i < symcount; ++i)
2763 if (syms[i - 1]->value + syms[i - 1]->section->vma
2764 != syms[i]->value + syms[i]->section->vma)
2765 syms[j++] = syms[i];
2766 symcount = j;
2767 }
2768
2769 i = 0;
2770 if (syms[i]->section == opd)
2771 ++i;
2772 codesecsym = i;
2773
2774 for (; i < symcount; ++i)
2775 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2776 != (SEC_CODE | SEC_ALLOC))
2777 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2778 break;
2779 codesecsymend = i;
2780
2781 for (; i < symcount; ++i)
2782 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2783 break;
2784 secsymend = i;
2785
2786 for (; i < symcount; ++i)
2787 if (syms[i]->section != opd)
2788 break;
2789 opdsymend = i;
2790
2791 for (; i < symcount; ++i)
2792 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2793 != (SEC_CODE | SEC_ALLOC))
2794 break;
2795 symcount = i;
2796
2797 count = 0;
2798 if (opdsymend == secsymend)
2799 goto done;
2800
2801 if (relocatable)
2802 {
2803 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2804 arelent *r;
2805 size_t size;
2806 long relcount;
2807
2808 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2809 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2810 if (relcount == 0)
2811 goto done;
2812
2813 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2814 {
2815 count = -1;
2816 goto done;
2817 }
2818
2819 size = 0;
2820 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2821 {
2822 asymbol *sym;
2823
2824 while (r < opd->relocation + relcount
2825 && r->address < syms[i]->value + opd->vma)
2826 ++r;
2827
2828 if (r == opd->relocation + relcount)
2829 break;
2830
2831 if (r->address != syms[i]->value + opd->vma)
2832 continue;
2833
2834 if (r->howto->type != R_PPC64_ADDR64)
2835 continue;
2836
2837 sym = *r->sym_ptr_ptr;
2838 if (!sym_exists_at (syms, opdsymend, symcount,
2839 sym->section->id, sym->value + r->addend))
2840 {
2841 ++count;
2842 size += sizeof (asymbol);
2843 size += strlen (syms[i]->name) + 2;
2844 }
2845 }
2846
2847 s = *ret = bfd_malloc (size);
2848 if (s == NULL)
2849 {
2850 count = -1;
2851 goto done;
2852 }
2853
2854 names = (char *) (s + count);
2855
2856 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2857 {
2858 asymbol *sym;
2859
2860 while (r < opd->relocation + relcount
2861 && r->address < syms[i]->value + opd->vma)
2862 ++r;
2863
2864 if (r == opd->relocation + relcount)
2865 break;
2866
2867 if (r->address != syms[i]->value + opd->vma)
2868 continue;
2869
2870 if (r->howto->type != R_PPC64_ADDR64)
2871 continue;
2872
2873 sym = *r->sym_ptr_ptr;
2874 if (!sym_exists_at (syms, opdsymend, symcount,
2875 sym->section->id, sym->value + r->addend))
2876 {
2877 size_t len;
2878
2879 *s = *syms[i];
2880 s->section = sym->section;
2881 s->value = sym->value + r->addend;
2882 s->name = names;
2883 *names++ = '.';
2884 len = strlen (syms[i]->name);
2885 memcpy (names, syms[i]->name, len + 1);
2886 names += len + 1;
2887 s++;
2888 }
2889 }
2890 }
2891 else
2892 {
2893 bfd_byte *contents;
2894 size_t size;
2895
2896 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2897 {
2898 if (contents)
2899 {
2900 free_contents_and_exit:
2901 free (contents);
2902 }
2903 count = -1;
2904 goto done;
2905 }
2906
2907 size = 0;
2908 for (i = secsymend; i < opdsymend; ++i)
2909 {
2910 bfd_vma ent;
2911
2912 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2913 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2914 {
2915 ++count;
2916 size += sizeof (asymbol);
2917 size += strlen (syms[i]->name) + 2;
2918 }
2919 }
2920
2921 s = *ret = bfd_malloc (size);
2922 if (s == NULL)
2923 goto free_contents_and_exit;
2924
2925 names = (char *) (s + count);
2926
2927 for (i = secsymend; i < opdsymend; ++i)
2928 {
2929 bfd_vma ent;
2930
2931 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2932 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2933 {
2934 long lo, hi;
2935 size_t len;
2936 asection *sec = abfd->sections;
2937
2938 *s = *syms[i];
2939 lo = codesecsym;
2940 hi = codesecsymend;
2941 while (lo < hi)
2942 {
2943 long mid = (lo + hi) >> 1;
2944 if (syms[mid]->section->vma < ent)
2945 lo = mid + 1;
2946 else if (syms[mid]->section->vma > ent)
2947 hi = mid;
2948 else
2949 {
2950 sec = syms[mid]->section;
2951 break;
2952 }
2953 }
2954
2955 if (lo >= hi && lo > codesecsym)
2956 sec = syms[lo - 1]->section;
2957
2958 for (; sec != NULL; sec = sec->next)
2959 {
2960 if (sec->vma > ent)
2961 break;
2962 if ((sec->flags & SEC_ALLOC) == 0
2963 || (sec->flags & SEC_LOAD) == 0)
2964 break;
2965 if ((sec->flags & SEC_CODE) != 0)
2966 s->section = sec;
2967 }
2968 s->value = ent - s->section->vma;
2969 s->name = names;
2970 *names++ = '.';
2971 len = strlen (syms[i]->name);
2972 memcpy (names, syms[i]->name, len + 1);
2973 names += len + 1;
2974 s++;
2975 }
2976 }
2977 free (contents);
2978 }
2979
2980 done:
2981 free (syms);
2982 return count;
2983 }
2984 \f
2985 /* The following functions are specific to the ELF linker, while
2986 functions above are used generally. Those named ppc64_elf_* are
2987 called by the main ELF linker code. They appear in this file more
2988 or less in the order in which they are called. eg.
2989 ppc64_elf_check_relocs is called early in the link process,
2990 ppc64_elf_finish_dynamic_sections is one of the last functions
2991 called.
2992
2993 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2994 functions have both a function code symbol and a function descriptor
2995 symbol. A call to foo in a relocatable object file looks like:
2996
2997 . .text
2998 . x:
2999 . bl .foo
3000 . nop
3001
3002 The function definition in another object file might be:
3003
3004 . .section .opd
3005 . foo: .quad .foo
3006 . .quad .TOC.@tocbase
3007 . .quad 0
3008 .
3009 . .text
3010 . .foo: blr
3011
3012 When the linker resolves the call during a static link, the branch
3013 unsurprisingly just goes to .foo and the .opd information is unused.
3014 If the function definition is in a shared library, things are a little
3015 different: The call goes via a plt call stub, the opd information gets
3016 copied to the plt, and the linker patches the nop.
3017
3018 . x:
3019 . bl .foo_stub
3020 . ld 2,40(1)
3021 .
3022 .
3023 . .foo_stub:
3024 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3025 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3026 . std 2,40(1) # this is the general idea
3027 . ld 11,0(12)
3028 . ld 2,8(12)
3029 . mtctr 11
3030 . ld 11,16(12)
3031 . bctr
3032 .
3033 . .section .plt
3034 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3035
3036 The "reloc ()" notation is supposed to indicate that the linker emits
3037 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3038 copying.
3039
3040 What are the difficulties here? Well, firstly, the relocations
3041 examined by the linker in check_relocs are against the function code
3042 sym .foo, while the dynamic relocation in the plt is emitted against
3043 the function descriptor symbol, foo. Somewhere along the line, we need
3044 to carefully copy dynamic link information from one symbol to the other.
3045 Secondly, the generic part of the elf linker will make .foo a dynamic
3046 symbol as is normal for most other backends. We need foo dynamic
3047 instead, at least for an application final link. However, when
3048 creating a shared library containing foo, we need to have both symbols
3049 dynamic so that references to .foo are satisfied during the early
3050 stages of linking. Otherwise the linker might decide to pull in a
3051 definition from some other object, eg. a static library.
3052
3053 Update: As of August 2004, we support a new convention. Function
3054 calls may use the function descriptor symbol, ie. "bl foo". This
3055 behaves exactly as "bl .foo". */
3056
3057 /* The linker needs to keep track of the number of relocs that it
3058 decides to copy as dynamic relocs in check_relocs for each symbol.
3059 This is so that it can later discard them if they are found to be
3060 unnecessary. We store the information in a field extending the
3061 regular ELF linker hash table. */
3062
3063 struct ppc_dyn_relocs
3064 {
3065 struct ppc_dyn_relocs *next;
3066
3067 /* The input section of the reloc. */
3068 asection *sec;
3069
3070 /* Total number of relocs copied for the input section. */
3071 bfd_size_type count;
3072
3073 /* Number of pc-relative relocs copied for the input section. */
3074 bfd_size_type pc_count;
3075 };
3076
3077 /* Track GOT entries needed for a given symbol. We might need more
3078 than one got entry per symbol. */
3079 struct got_entry
3080 {
3081 struct got_entry *next;
3082
3083 /* The symbol addend that we'll be placing in the GOT. */
3084 bfd_vma addend;
3085
3086 /* Unlike other ELF targets, we use separate GOT entries for the same
3087 symbol referenced from different input files. This is to support
3088 automatic multiple TOC/GOT sections, where the TOC base can vary
3089 from one input file to another.
3090
3091 Point to the BFD owning this GOT entry. */
3092 bfd *owner;
3093
3094 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3095 TLS_TPREL or TLS_DTPREL for tls entries. */
3096 char tls_type;
3097
3098 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3099 union
3100 {
3101 bfd_signed_vma refcount;
3102 bfd_vma offset;
3103 } got;
3104 };
3105
3106 /* The same for PLT. */
3107 struct plt_entry
3108 {
3109 struct plt_entry *next;
3110
3111 bfd_vma addend;
3112
3113 union
3114 {
3115 bfd_signed_vma refcount;
3116 bfd_vma offset;
3117 } plt;
3118 };
3119
3120 /* Of those relocs that might be copied as dynamic relocs, this macro
3121 selects those that must be copied when linking a shared library,
3122 even when the symbol is local. */
3123
3124 #define MUST_BE_DYN_RELOC(RTYPE) \
3125 ((RTYPE) != R_PPC64_REL32 \
3126 && (RTYPE) != R_PPC64_REL64 \
3127 && (RTYPE) != R_PPC64_REL30)
3128
3129 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3130 copying dynamic variables from a shared lib into an app's dynbss
3131 section, and instead use a dynamic relocation to point into the
3132 shared lib. With code that gcc generates, it's vital that this be
3133 enabled; In the PowerPC64 ABI, the address of a function is actually
3134 the address of a function descriptor, which resides in the .opd
3135 section. gcc uses the descriptor directly rather than going via the
3136 GOT as some other ABI's do, which means that initialized function
3137 pointers must reference the descriptor. Thus, a function pointer
3138 initialized to the address of a function in a shared library will
3139 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3140 redefines the function descriptor symbol to point to the copy. This
3141 presents a problem as a plt entry for that function is also
3142 initialized from the function descriptor symbol and the copy reloc
3143 may not be initialized first. */
3144 #define ELIMINATE_COPY_RELOCS 1
3145
3146 /* Section name for stubs is the associated section name plus this
3147 string. */
3148 #define STUB_SUFFIX ".stub"
3149
3150 /* Linker stubs.
3151 ppc_stub_long_branch:
3152 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3153 destination, but a 24 bit branch in a stub section will reach.
3154 . b dest
3155
3156 ppc_stub_plt_branch:
3157 Similar to the above, but a 24 bit branch in the stub section won't
3158 reach its destination.
3159 . addis %r12,%r2,xxx@toc@ha
3160 . ld %r11,xxx@toc@l(%r12)
3161 . mtctr %r11
3162 . bctr
3163
3164 ppc_stub_plt_call:
3165 Used to call a function in a shared library. If it so happens that
3166 the plt entry referenced crosses a 64k boundary, then an extra
3167 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3168 xxx+16 as appropriate.
3169 . addis %r12,%r2,xxx@toc@ha
3170 . std %r2,40(%r1)
3171 . ld %r11,xxx+0@toc@l(%r12)
3172 . ld %r2,xxx+8@toc@l(%r12)
3173 . mtctr %r11
3174 . ld %r11,xxx+16@toc@l(%r12)
3175 . bctr
3176
3177 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3178 code to adjust the value and save r2 to support multiple toc sections.
3179 A ppc_stub_long_branch with an r2 offset looks like:
3180 . std %r2,40(%r1)
3181 . addis %r2,%r2,off@ha
3182 . addi %r2,%r2,off@l
3183 . b dest
3184
3185 A ppc_stub_plt_branch with an r2 offset looks like:
3186 . std %r2,40(%r1)
3187 . addis %r12,%r2,xxx@toc@ha
3188 . ld %r11,xxx@toc@l(%r12)
3189 . addis %r2,%r2,off@ha
3190 . addi %r2,%r2,off@l
3191 . mtctr %r11
3192 . bctr
3193 */
3194
3195 enum ppc_stub_type {
3196 ppc_stub_none,
3197 ppc_stub_long_branch,
3198 ppc_stub_long_branch_r2off,
3199 ppc_stub_plt_branch,
3200 ppc_stub_plt_branch_r2off,
3201 ppc_stub_plt_call
3202 };
3203
3204 struct ppc_stub_hash_entry {
3205
3206 /* Base hash table entry structure. */
3207 struct bfd_hash_entry root;
3208
3209 enum ppc_stub_type stub_type;
3210
3211 /* The stub section. */
3212 asection *stub_sec;
3213
3214 /* Offset within stub_sec of the beginning of this stub. */
3215 bfd_vma stub_offset;
3216
3217 /* Given the symbol's value and its section we can determine its final
3218 value when building the stubs (so the stub knows where to jump. */
3219 bfd_vma target_value;
3220 asection *target_section;
3221
3222 /* The symbol table entry, if any, that this was derived from. */
3223 struct ppc_link_hash_entry *h;
3224
3225 /* And the reloc addend that this was derived from. */
3226 bfd_vma addend;
3227
3228 /* Where this stub is being called from, or, in the case of combined
3229 stub sections, the first input section in the group. */
3230 asection *id_sec;
3231 };
3232
3233 struct ppc_branch_hash_entry {
3234
3235 /* Base hash table entry structure. */
3236 struct bfd_hash_entry root;
3237
3238 /* Offset within .branch_lt. */
3239 unsigned int offset;
3240
3241 /* Generation marker. */
3242 unsigned int iter;
3243 };
3244
3245 struct ppc_link_hash_entry
3246 {
3247 struct elf_link_hash_entry elf;
3248
3249 /* A pointer to the most recently used stub hash entry against this
3250 symbol. */
3251 struct ppc_stub_hash_entry *stub_cache;
3252
3253 /* Track dynamic relocs copied for this symbol. */
3254 struct ppc_dyn_relocs *dyn_relocs;
3255
3256 /* Link between function code and descriptor symbols. */
3257 struct ppc_link_hash_entry *oh;
3258
3259 /* Flag function code and descriptor symbols. */
3260 unsigned int is_func:1;
3261 unsigned int is_func_descriptor:1;
3262 unsigned int fake:1;
3263
3264 /* Whether global opd/toc sym has been adjusted or not.
3265 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3266 should be set for all globals defined in any opd/toc section. */
3267 unsigned int adjust_done:1;
3268
3269 /* Set if we twiddled this symbol to weak at some stage. */
3270 unsigned int was_undefined:1;
3271
3272 /* Contexts in which symbol is used in the GOT (or TOC).
3273 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3274 corresponding relocs are encountered during check_relocs.
3275 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3276 indicate the corresponding GOT entry type is not needed.
3277 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3278 a TPREL one. We use a separate flag rather than setting TPREL
3279 just for convenience in distinguishing the two cases. */
3280 #define TLS_GD 1 /* GD reloc. */
3281 #define TLS_LD 2 /* LD reloc. */
3282 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3283 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3284 #define TLS_TLS 16 /* Any TLS reloc. */
3285 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3286 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3287 char tls_mask;
3288 };
3289
3290 /* ppc64 ELF linker hash table. */
3291
3292 struct ppc_link_hash_table
3293 {
3294 struct elf_link_hash_table elf;
3295
3296 /* The stub hash table. */
3297 struct bfd_hash_table stub_hash_table;
3298
3299 /* Another hash table for plt_branch stubs. */
3300 struct bfd_hash_table branch_hash_table;
3301
3302 /* Linker stub bfd. */
3303 bfd *stub_bfd;
3304
3305 /* Linker call-backs. */
3306 asection * (*add_stub_section) (const char *, asection *);
3307 void (*layout_sections_again) (void);
3308
3309 /* Array to keep track of which stub sections have been created, and
3310 information on stub grouping. */
3311 struct map_stub {
3312 /* This is the section to which stubs in the group will be attached. */
3313 asection *link_sec;
3314 /* The stub section. */
3315 asection *stub_sec;
3316 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3317 bfd_vma toc_off;
3318 } *stub_group;
3319
3320 /* Temp used when calculating TOC pointers. */
3321 bfd_vma toc_curr;
3322
3323 /* Highest input section id. */
3324 int top_id;
3325
3326 /* Highest output section index. */
3327 int top_index;
3328
3329 /* List of input sections for each output section. */
3330 asection **input_list;
3331
3332 /* Short-cuts to get to dynamic linker sections. */
3333 asection *got;
3334 asection *plt;
3335 asection *relplt;
3336 asection *dynbss;
3337 asection *relbss;
3338 asection *glink;
3339 asection *sfpr;
3340 asection *brlt;
3341 asection *relbrlt;
3342
3343 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3344 struct ppc_link_hash_entry *tls_get_addr;
3345 struct ppc_link_hash_entry *tls_get_addr_fd;
3346
3347 /* Statistics. */
3348 unsigned long stub_count[ppc_stub_plt_call];
3349
3350 /* Number of stubs against global syms. */
3351 unsigned long stub_globals;
3352
3353 /* Set if we should emit symbols for stubs. */
3354 unsigned int emit_stub_syms:1;
3355
3356 /* Support for multiple toc sections. */
3357 unsigned int no_multi_toc:1;
3358 unsigned int multi_toc_needed:1;
3359
3360 /* Set on error. */
3361 unsigned int stub_error:1;
3362
3363 /* Flag set when small branches are detected. Used to
3364 select suitable defaults for the stub group size. */
3365 unsigned int has_14bit_branch:1;
3366
3367 /* Temp used by ppc64_elf_check_directives. */
3368 unsigned int twiddled_syms:1;
3369
3370 /* Incremented every time we size stubs. */
3371 unsigned int stub_iteration;
3372
3373 /* Small local sym to section mapping cache. */
3374 struct sym_sec_cache sym_sec;
3375 };
3376
3377 /* Rename some of the generic section flags to better document how they
3378 are used here. */
3379 #define has_toc_reloc has_gp_reloc
3380 #define makes_toc_func_call need_finalize_relax
3381 #define call_check_in_progress reloc_done
3382
3383 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3384
3385 #define ppc_hash_table(p) \
3386 ((struct ppc_link_hash_table *) ((p)->hash))
3387
3388 #define ppc_stub_hash_lookup(table, string, create, copy) \
3389 ((struct ppc_stub_hash_entry *) \
3390 bfd_hash_lookup ((table), (string), (create), (copy)))
3391
3392 #define ppc_branch_hash_lookup(table, string, create, copy) \
3393 ((struct ppc_branch_hash_entry *) \
3394 bfd_hash_lookup ((table), (string), (create), (copy)))
3395
3396 /* Create an entry in the stub hash table. */
3397
3398 static struct bfd_hash_entry *
3399 stub_hash_newfunc (struct bfd_hash_entry *entry,
3400 struct bfd_hash_table *table,
3401 const char *string)
3402 {
3403 /* Allocate the structure if it has not already been allocated by a
3404 subclass. */
3405 if (entry == NULL)
3406 {
3407 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3408 if (entry == NULL)
3409 return entry;
3410 }
3411
3412 /* Call the allocation method of the superclass. */
3413 entry = bfd_hash_newfunc (entry, table, string);
3414 if (entry != NULL)
3415 {
3416 struct ppc_stub_hash_entry *eh;
3417
3418 /* Initialize the local fields. */
3419 eh = (struct ppc_stub_hash_entry *) entry;
3420 eh->stub_type = ppc_stub_none;
3421 eh->stub_sec = NULL;
3422 eh->stub_offset = 0;
3423 eh->target_value = 0;
3424 eh->target_section = NULL;
3425 eh->h = NULL;
3426 eh->id_sec = NULL;
3427 }
3428
3429 return entry;
3430 }
3431
3432 /* Create an entry in the branch hash table. */
3433
3434 static struct bfd_hash_entry *
3435 branch_hash_newfunc (struct bfd_hash_entry *entry,
3436 struct bfd_hash_table *table,
3437 const char *string)
3438 {
3439 /* Allocate the structure if it has not already been allocated by a
3440 subclass. */
3441 if (entry == NULL)
3442 {
3443 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3444 if (entry == NULL)
3445 return entry;
3446 }
3447
3448 /* Call the allocation method of the superclass. */
3449 entry = bfd_hash_newfunc (entry, table, string);
3450 if (entry != NULL)
3451 {
3452 struct ppc_branch_hash_entry *eh;
3453
3454 /* Initialize the local fields. */
3455 eh = (struct ppc_branch_hash_entry *) entry;
3456 eh->offset = 0;
3457 eh->iter = 0;
3458 }
3459
3460 return entry;
3461 }
3462
3463 /* Create an entry in a ppc64 ELF linker hash table. */
3464
3465 static struct bfd_hash_entry *
3466 link_hash_newfunc (struct bfd_hash_entry *entry,
3467 struct bfd_hash_table *table,
3468 const char *string)
3469 {
3470 /* Allocate the structure if it has not already been allocated by a
3471 subclass. */
3472 if (entry == NULL)
3473 {
3474 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3475 if (entry == NULL)
3476 return entry;
3477 }
3478
3479 /* Call the allocation method of the superclass. */
3480 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3481 if (entry != NULL)
3482 {
3483 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3484
3485 memset (&eh->stub_cache, 0,
3486 (sizeof (struct ppc_link_hash_entry)
3487 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3488 }
3489
3490 return entry;
3491 }
3492
3493 /* Create a ppc64 ELF linker hash table. */
3494
3495 static struct bfd_link_hash_table *
3496 ppc64_elf_link_hash_table_create (bfd *abfd)
3497 {
3498 struct ppc_link_hash_table *htab;
3499 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3500
3501 htab = bfd_zmalloc (amt);
3502 if (htab == NULL)
3503 return NULL;
3504
3505 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3506 {
3507 free (htab);
3508 return NULL;
3509 }
3510
3511 /* Init the stub hash table too. */
3512 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3513 return NULL;
3514
3515 /* And the branch hash table. */
3516 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3517 return NULL;
3518
3519 /* Initializing two fields of the union is just cosmetic. We really
3520 only care about glist, but when compiled on a 32-bit host the
3521 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3522 debugger inspection of these fields look nicer. */
3523 htab->elf.init_got_refcount.refcount = 0;
3524 htab->elf.init_got_refcount.glist = NULL;
3525 htab->elf.init_plt_refcount.refcount = 0;
3526 htab->elf.init_plt_refcount.glist = NULL;
3527 htab->elf.init_got_offset.offset = 0;
3528 htab->elf.init_got_offset.glist = NULL;
3529 htab->elf.init_plt_offset.offset = 0;
3530 htab->elf.init_plt_offset.glist = NULL;
3531
3532 return &htab->elf.root;
3533 }
3534
3535 /* Free the derived linker hash table. */
3536
3537 static void
3538 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3539 {
3540 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3541
3542 bfd_hash_table_free (&ret->stub_hash_table);
3543 bfd_hash_table_free (&ret->branch_hash_table);
3544 _bfd_generic_link_hash_table_free (hash);
3545 }
3546
3547 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3548
3549 void
3550 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3551 {
3552 struct ppc_link_hash_table *htab;
3553
3554 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3555
3556 /* Always hook our dynamic sections into the first bfd, which is the
3557 linker created stub bfd. This ensures that the GOT header is at
3558 the start of the output TOC section. */
3559 htab = ppc_hash_table (info);
3560 htab->stub_bfd = abfd;
3561 htab->elf.dynobj = abfd;
3562 }
3563
3564 /* Build a name for an entry in the stub hash table. */
3565
3566 static char *
3567 ppc_stub_name (const asection *input_section,
3568 const asection *sym_sec,
3569 const struct ppc_link_hash_entry *h,
3570 const Elf_Internal_Rela *rel)
3571 {
3572 char *stub_name;
3573 bfd_size_type len;
3574
3575 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3576 offsets from a sym as a branch target? In fact, we could
3577 probably assume the addend is always zero. */
3578 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3579
3580 if (h)
3581 {
3582 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3583 stub_name = bfd_malloc (len);
3584 if (stub_name == NULL)
3585 return stub_name;
3586
3587 sprintf (stub_name, "%08x.%s+%x",
3588 input_section->id & 0xffffffff,
3589 h->elf.root.root.string,
3590 (int) rel->r_addend & 0xffffffff);
3591 }
3592 else
3593 {
3594 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3595 stub_name = bfd_malloc (len);
3596 if (stub_name == NULL)
3597 return stub_name;
3598
3599 sprintf (stub_name, "%08x.%x:%x+%x",
3600 input_section->id & 0xffffffff,
3601 sym_sec->id & 0xffffffff,
3602 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3603 (int) rel->r_addend & 0xffffffff);
3604 }
3605 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3606 stub_name[len - 2] = 0;
3607 return stub_name;
3608 }
3609
3610 /* Look up an entry in the stub hash. Stub entries are cached because
3611 creating the stub name takes a bit of time. */
3612
3613 static struct ppc_stub_hash_entry *
3614 ppc_get_stub_entry (const asection *input_section,
3615 const asection *sym_sec,
3616 struct ppc_link_hash_entry *h,
3617 const Elf_Internal_Rela *rel,
3618 struct ppc_link_hash_table *htab)
3619 {
3620 struct ppc_stub_hash_entry *stub_entry;
3621 const asection *id_sec;
3622
3623 /* If this input section is part of a group of sections sharing one
3624 stub section, then use the id of the first section in the group.
3625 Stub names need to include a section id, as there may well be
3626 more than one stub used to reach say, printf, and we need to
3627 distinguish between them. */
3628 id_sec = htab->stub_group[input_section->id].link_sec;
3629
3630 if (h != NULL && h->stub_cache != NULL
3631 && h->stub_cache->h == h
3632 && h->stub_cache->id_sec == id_sec)
3633 {
3634 stub_entry = h->stub_cache;
3635 }
3636 else
3637 {
3638 char *stub_name;
3639
3640 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3641 if (stub_name == NULL)
3642 return NULL;
3643
3644 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3645 stub_name, FALSE, FALSE);
3646 if (h != NULL)
3647 h->stub_cache = stub_entry;
3648
3649 free (stub_name);
3650 }
3651
3652 return stub_entry;
3653 }
3654
3655 /* Add a new stub entry to the stub hash. Not all fields of the new
3656 stub entry are initialised. */
3657
3658 static struct ppc_stub_hash_entry *
3659 ppc_add_stub (const char *stub_name,
3660 asection *section,
3661 struct ppc_link_hash_table *htab)
3662 {
3663 asection *link_sec;
3664 asection *stub_sec;
3665 struct ppc_stub_hash_entry *stub_entry;
3666
3667 link_sec = htab->stub_group[section->id].link_sec;
3668 stub_sec = htab->stub_group[section->id].stub_sec;
3669 if (stub_sec == NULL)
3670 {
3671 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3672 if (stub_sec == NULL)
3673 {
3674 size_t namelen;
3675 bfd_size_type len;
3676 char *s_name;
3677
3678 namelen = strlen (link_sec->name);
3679 len = namelen + sizeof (STUB_SUFFIX);
3680 s_name = bfd_alloc (htab->stub_bfd, len);
3681 if (s_name == NULL)
3682 return NULL;
3683
3684 memcpy (s_name, link_sec->name, namelen);
3685 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3686 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3687 if (stub_sec == NULL)
3688 return NULL;
3689 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3690 }
3691 htab->stub_group[section->id].stub_sec = stub_sec;
3692 }
3693
3694 /* Enter this entry into the linker stub hash table. */
3695 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3696 TRUE, FALSE);
3697 if (stub_entry == NULL)
3698 {
3699 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3700 section->owner, stub_name);
3701 return NULL;
3702 }
3703
3704 stub_entry->stub_sec = stub_sec;
3705 stub_entry->stub_offset = 0;
3706 stub_entry->id_sec = link_sec;
3707 return stub_entry;
3708 }
3709
3710 /* Create sections for linker generated code. */
3711
3712 static bfd_boolean
3713 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3714 {
3715 struct ppc_link_hash_table *htab;
3716 flagword flags;
3717
3718 htab = ppc_hash_table (info);
3719
3720 /* Create .sfpr for code to save and restore fp regs. */
3721 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3722 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3723 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3724 flags);
3725 if (htab->sfpr == NULL
3726 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3727 return FALSE;
3728
3729 /* Create .glink for lazy dynamic linking support. */
3730 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3731 flags);
3732 if (htab->glink == NULL
3733 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3734 return FALSE;
3735
3736 /* Create .branch_lt for plt_branch stubs. */
3737 flags = (SEC_ALLOC | SEC_LOAD
3738 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3739 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3740 flags);
3741 if (htab->brlt == NULL
3742 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3743 return FALSE;
3744
3745 if (info->shared || info->emitrelocations)
3746 {
3747 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3748 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3749 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3750 ".rela.branch_lt",
3751 flags);
3752 if (!htab->relbrlt
3753 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3754 return FALSE;
3755 }
3756 return TRUE;
3757 }
3758
3759 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3760 not already done. */
3761
3762 static bfd_boolean
3763 create_got_section (bfd *abfd, struct bfd_link_info *info)
3764 {
3765 asection *got, *relgot;
3766 flagword flags;
3767 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3768
3769 if (!htab->got)
3770 {
3771 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3772 return FALSE;
3773
3774 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3775 if (!htab->got)
3776 abort ();
3777 }
3778
3779 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3780 | SEC_LINKER_CREATED);
3781
3782 got = bfd_make_section_with_flags (abfd, ".got", flags);
3783 if (!got
3784 || !bfd_set_section_alignment (abfd, got, 3))
3785 return FALSE;
3786
3787 relgot = bfd_make_section_with_flags (abfd, ".rela.got",
3788 flags | SEC_READONLY);
3789 if (!relgot
3790 || ! bfd_set_section_alignment (abfd, relgot, 3))
3791 return FALSE;
3792
3793 ppc64_elf_tdata (abfd)->got = got;
3794 ppc64_elf_tdata (abfd)->relgot = relgot;
3795 return TRUE;
3796 }
3797
3798 /* Create the dynamic sections, and set up shortcuts. */
3799
3800 static bfd_boolean
3801 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3802 {
3803 struct ppc_link_hash_table *htab;
3804
3805 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3806 return FALSE;
3807
3808 htab = ppc_hash_table (info);
3809 if (!htab->got)
3810 htab->got = bfd_get_section_by_name (dynobj, ".got");
3811 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3812 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3813 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3814 if (!info->shared)
3815 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3816
3817 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3818 || (!info->shared && !htab->relbss))
3819 abort ();
3820
3821 return TRUE;
3822 }
3823
3824 /* Merge PLT info on FROM with that on TO. */
3825
3826 static void
3827 move_plt_plist (struct ppc_link_hash_entry *from,
3828 struct ppc_link_hash_entry *to)
3829 {
3830 if (from->elf.plt.plist != NULL)
3831 {
3832 if (to->elf.plt.plist != NULL)
3833 {
3834 struct plt_entry **entp;
3835 struct plt_entry *ent;
3836
3837 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3838 {
3839 struct plt_entry *dent;
3840
3841 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3842 if (dent->addend == ent->addend)
3843 {
3844 dent->plt.refcount += ent->plt.refcount;
3845 *entp = ent->next;
3846 break;
3847 }
3848 if (dent == NULL)
3849 entp = &ent->next;
3850 }
3851 *entp = to->elf.plt.plist;
3852 }
3853
3854 to->elf.plt.plist = from->elf.plt.plist;
3855 from->elf.plt.plist = NULL;
3856 }
3857 }
3858
3859 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3860
3861 static void
3862 ppc64_elf_copy_indirect_symbol
3863 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3864 struct elf_link_hash_entry *dir,
3865 struct elf_link_hash_entry *ind)
3866 {
3867 struct ppc_link_hash_entry *edir, *eind;
3868
3869 edir = (struct ppc_link_hash_entry *) dir;
3870 eind = (struct ppc_link_hash_entry *) ind;
3871
3872 /* Copy over any dynamic relocs we may have on the indirect sym. */
3873 if (eind->dyn_relocs != NULL)
3874 {
3875 if (edir->dyn_relocs != NULL)
3876 {
3877 struct ppc_dyn_relocs **pp;
3878 struct ppc_dyn_relocs *p;
3879
3880 if (eind->elf.root.type == bfd_link_hash_indirect)
3881 abort ();
3882
3883 /* Add reloc counts against the weak sym to the strong sym
3884 list. Merge any entries against the same section. */
3885 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3886 {
3887 struct ppc_dyn_relocs *q;
3888
3889 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3890 if (q->sec == p->sec)
3891 {
3892 q->pc_count += p->pc_count;
3893 q->count += p->count;
3894 *pp = p->next;
3895 break;
3896 }
3897 if (q == NULL)
3898 pp = &p->next;
3899 }
3900 *pp = edir->dyn_relocs;
3901 }
3902
3903 edir->dyn_relocs = eind->dyn_relocs;
3904 eind->dyn_relocs = NULL;
3905 }
3906
3907 edir->is_func |= eind->is_func;
3908 edir->is_func_descriptor |= eind->is_func_descriptor;
3909 edir->tls_mask |= eind->tls_mask;
3910
3911 /* If called to transfer flags for a weakdef during processing
3912 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3913 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3914 if (!(ELIMINATE_COPY_RELOCS
3915 && eind->elf.root.type != bfd_link_hash_indirect
3916 && edir->elf.dynamic_adjusted))
3917 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3918
3919 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3920 edir->elf.ref_regular |= eind->elf.ref_regular;
3921 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3922 edir->elf.needs_plt |= eind->elf.needs_plt;
3923
3924 /* If we were called to copy over info for a weak sym, that's all. */
3925 if (eind->elf.root.type != bfd_link_hash_indirect)
3926 return;
3927
3928 /* Copy over got entries that we may have already seen to the
3929 symbol which just became indirect. */
3930 if (eind->elf.got.glist != NULL)
3931 {
3932 if (edir->elf.got.glist != NULL)
3933 {
3934 struct got_entry **entp;
3935 struct got_entry *ent;
3936
3937 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3938 {
3939 struct got_entry *dent;
3940
3941 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3942 if (dent->addend == ent->addend
3943 && dent->owner == ent->owner
3944 && dent->tls_type == ent->tls_type)
3945 {
3946 dent->got.refcount += ent->got.refcount;
3947 *entp = ent->next;
3948 break;
3949 }
3950 if (dent == NULL)
3951 entp = &ent->next;
3952 }
3953 *entp = edir->elf.got.glist;
3954 }
3955
3956 edir->elf.got.glist = eind->elf.got.glist;
3957 eind->elf.got.glist = NULL;
3958 }
3959
3960 /* And plt entries. */
3961 move_plt_plist (eind, edir);
3962
3963 if (edir->elf.dynindx == -1)
3964 {
3965 edir->elf.dynindx = eind->elf.dynindx;
3966 edir->elf.dynstr_index = eind->elf.dynstr_index;
3967 eind->elf.dynindx = -1;
3968 eind->elf.dynstr_index = 0;
3969 }
3970 else
3971 BFD_ASSERT (eind->elf.dynindx == -1);
3972 }
3973
3974 /* Find the function descriptor hash entry from the given function code
3975 hash entry FH. Link the entries via their OH fields. */
3976
3977 static struct ppc_link_hash_entry *
3978 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3979 {
3980 struct ppc_link_hash_entry *fdh = fh->oh;
3981
3982 if (fdh == NULL)
3983 {
3984 const char *fd_name = fh->elf.root.root.string + 1;
3985
3986 fdh = (struct ppc_link_hash_entry *)
3987 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3988 if (fdh != NULL)
3989 {
3990 fdh->is_func_descriptor = 1;
3991 fdh->oh = fh;
3992 fh->is_func = 1;
3993 fh->oh = fdh;
3994 }
3995 }
3996
3997 return fdh;
3998 }
3999
4000 /* Make a fake function descriptor sym for the code sym FH. */
4001
4002 static struct ppc_link_hash_entry *
4003 make_fdh (struct bfd_link_info *info,
4004 struct ppc_link_hash_entry *fh)
4005 {
4006 bfd *abfd;
4007 asymbol *newsym;
4008 struct bfd_link_hash_entry *bh;
4009 struct ppc_link_hash_entry *fdh;
4010
4011 abfd = fh->elf.root.u.undef.abfd;
4012 newsym = bfd_make_empty_symbol (abfd);
4013 newsym->name = fh->elf.root.root.string + 1;
4014 newsym->section = bfd_und_section_ptr;
4015 newsym->value = 0;
4016 newsym->flags = BSF_WEAK;
4017
4018 bh = NULL;
4019 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4020 newsym->flags, newsym->section,
4021 newsym->value, NULL, FALSE, FALSE,
4022 &bh))
4023 return NULL;
4024
4025 fdh = (struct ppc_link_hash_entry *) bh;
4026 fdh->elf.non_elf = 0;
4027 fdh->fake = 1;
4028 fdh->is_func_descriptor = 1;
4029 fdh->oh = fh;
4030 fh->is_func = 1;
4031 fh->oh = fdh;
4032 return fdh;
4033 }
4034
4035 /* Hacks to support old ABI code.
4036 When making function calls, old ABI code references function entry
4037 points (dot symbols), while new ABI code references the function
4038 descriptor symbol. We need to make any combination of reference and
4039 definition work together, without breaking archive linking.
4040
4041 For a defined function "foo" and an undefined call to "bar":
4042 An old object defines "foo" and ".foo", references ".bar" (possibly
4043 "bar" too).
4044 A new object defines "foo" and references "bar".
4045
4046 A new object thus has no problem with its undefined symbols being
4047 satisfied by definitions in an old object. On the other hand, the
4048 old object won't have ".bar" satisfied by a new object. */
4049
4050 /* Fix function descriptor symbols defined in .opd sections to be
4051 function type. */
4052
4053 static bfd_boolean
4054 ppc64_elf_add_symbol_hook (bfd *ibfd,
4055 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4056 Elf_Internal_Sym *isym,
4057 const char **name,
4058 flagword *flags ATTRIBUTE_UNUSED,
4059 asection **sec,
4060 bfd_vma *value ATTRIBUTE_UNUSED)
4061 {
4062 if (*sec != NULL
4063 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4064 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4065
4066 if ((*name)[0] == '.'
4067 && ELF_ST_BIND (isym->st_info) == STB_GLOBAL
4068 && ELF_ST_TYPE (isym->st_info) < STT_SECTION
4069 && is_ppc64_elf_target (ibfd->xvec))
4070 ppc64_elf_tdata (ibfd)->u.has_dotsym = 1;
4071
4072 return TRUE;
4073 }
4074
4075 /* This function makes an old ABI object reference to ".bar" cause the
4076 inclusion of a new ABI object archive that defines "bar".
4077 NAME is a symbol defined in an archive. Return a symbol in the hash
4078 table that might be satisfied by the archive symbols. */
4079
4080 static struct elf_link_hash_entry *
4081 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4082 struct bfd_link_info *info,
4083 const char *name)
4084 {
4085 struct elf_link_hash_entry *h;
4086 char *dot_name;
4087 size_t len;
4088
4089 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4090 if (h != NULL
4091 /* Don't return this sym if it is a fake function descriptor
4092 created by add_symbol_adjust. */
4093 && !(h->root.type == bfd_link_hash_undefweak
4094 && ((struct ppc_link_hash_entry *) h)->fake))
4095 return h;
4096
4097 if (name[0] == '.')
4098 return h;
4099
4100 len = strlen (name);
4101 dot_name = bfd_alloc (abfd, len + 2);
4102 if (dot_name == NULL)
4103 return (struct elf_link_hash_entry *) 0 - 1;
4104 dot_name[0] = '.';
4105 memcpy (dot_name + 1, name, len + 1);
4106 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4107 bfd_release (abfd, dot_name);
4108 return h;
4109 }
4110
4111 /* This function satisfies all old ABI object references to ".bar" if a
4112 new ABI object defines "bar". Well, at least, undefined dot symbols
4113 are made weak. This stops later archive searches from including an
4114 object if we already have a function descriptor definition. It also
4115 prevents the linker complaining about undefined symbols.
4116 We also check and correct mismatched symbol visibility here. The
4117 most restrictive visibility of the function descriptor and the
4118 function entry symbol is used. */
4119
4120 struct add_symbol_adjust_data
4121 {
4122 struct bfd_link_info *info;
4123 bfd_boolean ok;
4124 };
4125
4126 static bfd_boolean
4127 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4128 {
4129 struct add_symbol_adjust_data *data;
4130 struct ppc_link_hash_table *htab;
4131 struct ppc_link_hash_entry *eh;
4132 struct ppc_link_hash_entry *fdh;
4133
4134 if (h->root.type == bfd_link_hash_indirect)
4135 return TRUE;
4136
4137 if (h->root.type == bfd_link_hash_warning)
4138 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4139
4140 if (h->root.root.string[0] != '.')
4141 return TRUE;
4142
4143 data = inf;
4144 htab = ppc_hash_table (data->info);
4145 eh = (struct ppc_link_hash_entry *) h;
4146 fdh = get_fdh (eh, htab);
4147 if (fdh == NULL
4148 && !data->info->relocatable
4149 && (eh->elf.root.type == bfd_link_hash_undefined
4150 || eh->elf.root.type == bfd_link_hash_undefweak)
4151 && eh->elf.ref_regular)
4152 {
4153 /* Make an undefweak function descriptor sym, which is enough to
4154 pull in an --as-needed shared lib, but won't cause link
4155 errors. Archives are handled elsewhere. */
4156 fdh = make_fdh (data->info, eh);
4157 if (fdh == NULL)
4158 data->ok = FALSE;
4159 else
4160 fdh->elf.ref_regular = 1;
4161 }
4162 else if (fdh != NULL)
4163 {
4164 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4165 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4166 if (entry_vis < descr_vis)
4167 fdh->elf.other += entry_vis - descr_vis;
4168 else if (entry_vis > descr_vis)
4169 eh->elf.other += descr_vis - entry_vis;
4170
4171 if ((fdh->elf.root.type == bfd_link_hash_defined
4172 || fdh->elf.root.type == bfd_link_hash_defweak)
4173 && eh->elf.root.type == bfd_link_hash_undefined)
4174 {
4175 eh->elf.root.type = bfd_link_hash_undefweak;
4176 eh->was_undefined = 1;
4177 htab->twiddled_syms = 1;
4178 }
4179 }
4180
4181 return TRUE;
4182 }
4183
4184 static bfd_boolean
4185 ppc64_elf_check_directives (bfd *abfd, struct bfd_link_info *info)
4186 {
4187 struct ppc_link_hash_table *htab;
4188 struct add_symbol_adjust_data data;
4189
4190 if (!is_ppc64_elf_target (abfd->xvec))
4191 return TRUE;
4192
4193 if (!ppc64_elf_tdata (abfd)->u.has_dotsym)
4194 return TRUE;
4195 ppc64_elf_tdata (abfd)->u.deleted_section = NULL;
4196
4197 htab = ppc_hash_table (info);
4198 if (!is_ppc64_elf_target (htab->elf.root.creator))
4199 return TRUE;
4200
4201 data.info = info;
4202 data.ok = TRUE;
4203 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4204
4205 /* We need to fix the undefs list for any syms we have twiddled to
4206 undef_weak. */
4207 if (htab->twiddled_syms)
4208 {
4209 bfd_link_repair_undef_list (&htab->elf.root);
4210 htab->twiddled_syms = 0;
4211 }
4212 return data.ok;
4213 }
4214
4215 static bfd_boolean
4216 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4217 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4218 {
4219 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4220 char *local_got_tls_masks;
4221
4222 if (local_got_ents == NULL)
4223 {
4224 bfd_size_type size = symtab_hdr->sh_info;
4225
4226 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4227 local_got_ents = bfd_zalloc (abfd, size);
4228 if (local_got_ents == NULL)
4229 return FALSE;
4230 elf_local_got_ents (abfd) = local_got_ents;
4231 }
4232
4233 if ((tls_type & TLS_EXPLICIT) == 0)
4234 {
4235 struct got_entry *ent;
4236
4237 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4238 if (ent->addend == r_addend
4239 && ent->owner == abfd
4240 && ent->tls_type == tls_type)
4241 break;
4242 if (ent == NULL)
4243 {
4244 bfd_size_type amt = sizeof (*ent);
4245 ent = bfd_alloc (abfd, amt);
4246 if (ent == NULL)
4247 return FALSE;
4248 ent->next = local_got_ents[r_symndx];
4249 ent->addend = r_addend;
4250 ent->owner = abfd;
4251 ent->tls_type = tls_type;
4252 ent->got.refcount = 0;
4253 local_got_ents[r_symndx] = ent;
4254 }
4255 ent->got.refcount += 1;
4256 }
4257
4258 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4259 local_got_tls_masks[r_symndx] |= tls_type;
4260 return TRUE;
4261 }
4262
4263 static bfd_boolean
4264 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4265 {
4266 struct plt_entry *ent;
4267
4268 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4269 if (ent->addend == addend)
4270 break;
4271 if (ent == NULL)
4272 {
4273 bfd_size_type amt = sizeof (*ent);
4274 ent = bfd_alloc (abfd, amt);
4275 if (ent == NULL)
4276 return FALSE;
4277 ent->next = eh->elf.plt.plist;
4278 ent->addend = addend;
4279 ent->plt.refcount = 0;
4280 eh->elf.plt.plist = ent;
4281 }
4282 ent->plt.refcount += 1;
4283 eh->elf.needs_plt = 1;
4284 if (eh->elf.root.root.string[0] == '.'
4285 && eh->elf.root.root.string[1] != '\0')
4286 eh->is_func = 1;
4287 return TRUE;
4288 }
4289
4290 /* Look through the relocs for a section during the first phase, and
4291 calculate needed space in the global offset table, procedure
4292 linkage table, and dynamic reloc sections. */
4293
4294 static bfd_boolean
4295 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4296 asection *sec, const Elf_Internal_Rela *relocs)
4297 {
4298 struct ppc_link_hash_table *htab;
4299 Elf_Internal_Shdr *symtab_hdr;
4300 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4301 const Elf_Internal_Rela *rel;
4302 const Elf_Internal_Rela *rel_end;
4303 asection *sreloc;
4304 asection **opd_sym_map;
4305
4306 if (info->relocatable)
4307 return TRUE;
4308
4309 /* Don't do anything special with non-loaded, non-alloced sections.
4310 In particular, any relocs in such sections should not affect GOT
4311 and PLT reference counting (ie. we don't allow them to create GOT
4312 or PLT entries), there's no possibility or desire to optimize TLS
4313 relocs, and there's not much point in propagating relocs to shared
4314 libs that the dynamic linker won't relocate. */
4315 if ((sec->flags & SEC_ALLOC) == 0)
4316 return TRUE;
4317
4318 htab = ppc_hash_table (info);
4319 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4320
4321 sym_hashes = elf_sym_hashes (abfd);
4322 sym_hashes_end = (sym_hashes
4323 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4324 - symtab_hdr->sh_info);
4325
4326 sreloc = NULL;
4327 opd_sym_map = NULL;
4328 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4329 {
4330 /* Garbage collection needs some extra help with .opd sections.
4331 We don't want to necessarily keep everything referenced by
4332 relocs in .opd, as that would keep all functions. Instead,
4333 if we reference an .opd symbol (a function descriptor), we
4334 want to keep the function code symbol's section. This is
4335 easy for global symbols, but for local syms we need to keep
4336 information about the associated function section. Later, if
4337 edit_opd deletes entries, we'll use this array to adjust
4338 local syms in .opd. */
4339 union opd_info {
4340 asection *func_section;
4341 long entry_adjust;
4342 };
4343 bfd_size_type amt;
4344
4345 amt = sec->size * sizeof (union opd_info) / 8;
4346 opd_sym_map = bfd_zalloc (abfd, amt);
4347 if (opd_sym_map == NULL)
4348 return FALSE;
4349 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4350 }
4351
4352 if (htab->sfpr == NULL
4353 && !create_linkage_sections (htab->elf.dynobj, info))
4354 return FALSE;
4355
4356 rel_end = relocs + sec->reloc_count;
4357 for (rel = relocs; rel < rel_end; rel++)
4358 {
4359 unsigned long r_symndx;
4360 struct elf_link_hash_entry *h;
4361 enum elf_ppc64_reloc_type r_type;
4362 int tls_type = 0;
4363
4364 r_symndx = ELF64_R_SYM (rel->r_info);
4365 if (r_symndx < symtab_hdr->sh_info)
4366 h = NULL;
4367 else
4368 {
4369 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4370 while (h->root.type == bfd_link_hash_indirect
4371 || h->root.type == bfd_link_hash_warning)
4372 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4373 }
4374
4375 r_type = ELF64_R_TYPE (rel->r_info);
4376 switch (r_type)
4377 {
4378 case R_PPC64_GOT_TLSLD16:
4379 case R_PPC64_GOT_TLSLD16_LO:
4380 case R_PPC64_GOT_TLSLD16_HI:
4381 case R_PPC64_GOT_TLSLD16_HA:
4382 ppc64_tlsld_got (abfd)->refcount += 1;
4383 tls_type = TLS_TLS | TLS_LD;
4384 goto dogottls;
4385
4386 case R_PPC64_GOT_TLSGD16:
4387 case R_PPC64_GOT_TLSGD16_LO:
4388 case R_PPC64_GOT_TLSGD16_HI:
4389 case R_PPC64_GOT_TLSGD16_HA:
4390 tls_type = TLS_TLS | TLS_GD;
4391 goto dogottls;
4392
4393 case R_PPC64_GOT_TPREL16_DS:
4394 case R_PPC64_GOT_TPREL16_LO_DS:
4395 case R_PPC64_GOT_TPREL16_HI:
4396 case R_PPC64_GOT_TPREL16_HA:
4397 if (info->shared)
4398 info->flags |= DF_STATIC_TLS;
4399 tls_type = TLS_TLS | TLS_TPREL;
4400 goto dogottls;
4401
4402 case R_PPC64_GOT_DTPREL16_DS:
4403 case R_PPC64_GOT_DTPREL16_LO_DS:
4404 case R_PPC64_GOT_DTPREL16_HI:
4405 case R_PPC64_GOT_DTPREL16_HA:
4406 tls_type = TLS_TLS | TLS_DTPREL;
4407 dogottls:
4408 sec->has_tls_reloc = 1;
4409 /* Fall thru */
4410
4411 case R_PPC64_GOT16:
4412 case R_PPC64_GOT16_DS:
4413 case R_PPC64_GOT16_HA:
4414 case R_PPC64_GOT16_HI:
4415 case R_PPC64_GOT16_LO:
4416 case R_PPC64_GOT16_LO_DS:
4417 /* This symbol requires a global offset table entry. */
4418 sec->has_toc_reloc = 1;
4419 if (ppc64_elf_tdata (abfd)->got == NULL
4420 && !create_got_section (abfd, info))
4421 return FALSE;
4422
4423 if (h != NULL)
4424 {
4425 struct ppc_link_hash_entry *eh;
4426 struct got_entry *ent;
4427
4428 eh = (struct ppc_link_hash_entry *) h;
4429 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4430 if (ent->addend == rel->r_addend
4431 && ent->owner == abfd
4432 && ent->tls_type == tls_type)
4433 break;
4434 if (ent == NULL)
4435 {
4436 bfd_size_type amt = sizeof (*ent);
4437 ent = bfd_alloc (abfd, amt);
4438 if (ent == NULL)
4439 return FALSE;
4440 ent->next = eh->elf.got.glist;
4441 ent->addend = rel->r_addend;
4442 ent->owner = abfd;
4443 ent->tls_type = tls_type;
4444 ent->got.refcount = 0;
4445 eh->elf.got.glist = ent;
4446 }
4447 ent->got.refcount += 1;
4448 eh->tls_mask |= tls_type;
4449 }
4450 else
4451 /* This is a global offset table entry for a local symbol. */
4452 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4453 rel->r_addend, tls_type))
4454 return FALSE;
4455 break;
4456
4457 case R_PPC64_PLT16_HA:
4458 case R_PPC64_PLT16_HI:
4459 case R_PPC64_PLT16_LO:
4460 case R_PPC64_PLT32:
4461 case R_PPC64_PLT64:
4462 /* This symbol requires a procedure linkage table entry. We
4463 actually build the entry in adjust_dynamic_symbol,
4464 because this might be a case of linking PIC code without
4465 linking in any dynamic objects, in which case we don't
4466 need to generate a procedure linkage table after all. */
4467 if (h == NULL)
4468 {
4469 /* It does not make sense to have a procedure linkage
4470 table entry for a local symbol. */
4471 bfd_set_error (bfd_error_bad_value);
4472 return FALSE;
4473 }
4474 else
4475 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4476 rel->r_addend))
4477 return FALSE;
4478 break;
4479
4480 /* The following relocations don't need to propagate the
4481 relocation if linking a shared object since they are
4482 section relative. */
4483 case R_PPC64_SECTOFF:
4484 case R_PPC64_SECTOFF_LO:
4485 case R_PPC64_SECTOFF_HI:
4486 case R_PPC64_SECTOFF_HA:
4487 case R_PPC64_SECTOFF_DS:
4488 case R_PPC64_SECTOFF_LO_DS:
4489 case R_PPC64_DTPREL16:
4490 case R_PPC64_DTPREL16_LO:
4491 case R_PPC64_DTPREL16_HI:
4492 case R_PPC64_DTPREL16_HA:
4493 case R_PPC64_DTPREL16_DS:
4494 case R_PPC64_DTPREL16_LO_DS:
4495 case R_PPC64_DTPREL16_HIGHER:
4496 case R_PPC64_DTPREL16_HIGHERA:
4497 case R_PPC64_DTPREL16_HIGHEST:
4498 case R_PPC64_DTPREL16_HIGHESTA:
4499 break;
4500
4501 /* Nor do these. */
4502 case R_PPC64_TOC16:
4503 case R_PPC64_TOC16_LO:
4504 case R_PPC64_TOC16_HI:
4505 case R_PPC64_TOC16_HA:
4506 case R_PPC64_TOC16_DS:
4507 case R_PPC64_TOC16_LO_DS:
4508 sec->has_toc_reloc = 1;
4509 break;
4510
4511 /* This relocation describes the C++ object vtable hierarchy.
4512 Reconstruct it for later use during GC. */
4513 case R_PPC64_GNU_VTINHERIT:
4514 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4515 return FALSE;
4516 break;
4517
4518 /* This relocation describes which C++ vtable entries are actually
4519 used. Record for later use during GC. */
4520 case R_PPC64_GNU_VTENTRY:
4521 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4522 return FALSE;
4523 break;
4524
4525 case R_PPC64_REL14:
4526 case R_PPC64_REL14_BRTAKEN:
4527 case R_PPC64_REL14_BRNTAKEN:
4528 htab->has_14bit_branch = 1;
4529 /* Fall through. */
4530
4531 case R_PPC64_REL24:
4532 if (h != NULL)
4533 {
4534 /* We may need a .plt entry if the function this reloc
4535 refers to is in a shared lib. */
4536 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4537 rel->r_addend))
4538 return FALSE;
4539 if (h == &htab->tls_get_addr->elf
4540 || h == &htab->tls_get_addr_fd->elf)
4541 sec->has_tls_reloc = 1;
4542 else if (htab->tls_get_addr == NULL
4543 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4544 && (h->root.root.string[15] == 0
4545 || h->root.root.string[15] == '@'))
4546 {
4547 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4548 sec->has_tls_reloc = 1;
4549 }
4550 else if (htab->tls_get_addr_fd == NULL
4551 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4552 && (h->root.root.string[14] == 0
4553 || h->root.root.string[14] == '@'))
4554 {
4555 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4556 sec->has_tls_reloc = 1;
4557 }
4558 }
4559 break;
4560
4561 case R_PPC64_TPREL64:
4562 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4563 if (info->shared)
4564 info->flags |= DF_STATIC_TLS;
4565 goto dotlstoc;
4566
4567 case R_PPC64_DTPMOD64:
4568 if (rel + 1 < rel_end
4569 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4570 && rel[1].r_offset == rel->r_offset + 8)
4571 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4572 else
4573 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4574 goto dotlstoc;
4575
4576 case R_PPC64_DTPREL64:
4577 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4578 if (rel != relocs
4579 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4580 && rel[-1].r_offset == rel->r_offset - 8)
4581 /* This is the second reloc of a dtpmod, dtprel pair.
4582 Don't mark with TLS_DTPREL. */
4583 goto dodyn;
4584
4585 dotlstoc:
4586 sec->has_tls_reloc = 1;
4587 if (h != NULL)
4588 {
4589 struct ppc_link_hash_entry *eh;
4590 eh = (struct ppc_link_hash_entry *) h;
4591 eh->tls_mask |= tls_type;
4592 }
4593 else
4594 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4595 rel->r_addend, tls_type))
4596 return FALSE;
4597
4598 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4599 {
4600 /* One extra to simplify get_tls_mask. */
4601 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4602 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4603 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4604 return FALSE;
4605 }
4606 BFD_ASSERT (rel->r_offset % 8 == 0);
4607 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4608
4609 /* Mark the second slot of a GD or LD entry.
4610 -1 to indicate GD and -2 to indicate LD. */
4611 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4612 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4613 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4614 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4615 goto dodyn;
4616
4617 case R_PPC64_TPREL16:
4618 case R_PPC64_TPREL16_LO:
4619 case R_PPC64_TPREL16_HI:
4620 case R_PPC64_TPREL16_HA:
4621 case R_PPC64_TPREL16_DS:
4622 case R_PPC64_TPREL16_LO_DS:
4623 case R_PPC64_TPREL16_HIGHER:
4624 case R_PPC64_TPREL16_HIGHERA:
4625 case R_PPC64_TPREL16_HIGHEST:
4626 case R_PPC64_TPREL16_HIGHESTA:
4627 if (info->shared)
4628 {
4629 info->flags |= DF_STATIC_TLS;
4630 goto dodyn;
4631 }
4632 break;
4633
4634 case R_PPC64_ADDR64:
4635 if (opd_sym_map != NULL
4636 && rel + 1 < rel_end
4637 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4638 {
4639 if (h != NULL)
4640 {
4641 if (h->root.root.string[0] == '.'
4642 && h->root.root.string[1] != 0
4643 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4644 ;
4645 else
4646 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4647 }
4648 else
4649 {
4650 asection *s;
4651
4652 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4653 r_symndx);
4654 if (s == NULL)
4655 return FALSE;
4656 else if (s != sec)
4657 opd_sym_map[rel->r_offset / 8] = s;
4658 }
4659 }
4660 /* Fall through. */
4661
4662 case R_PPC64_REL30:
4663 case R_PPC64_REL32:
4664 case R_PPC64_REL64:
4665 case R_PPC64_ADDR14:
4666 case R_PPC64_ADDR14_BRNTAKEN:
4667 case R_PPC64_ADDR14_BRTAKEN:
4668 case R_PPC64_ADDR16:
4669 case R_PPC64_ADDR16_DS:
4670 case R_PPC64_ADDR16_HA:
4671 case R_PPC64_ADDR16_HI:
4672 case R_PPC64_ADDR16_HIGHER:
4673 case R_PPC64_ADDR16_HIGHERA:
4674 case R_PPC64_ADDR16_HIGHEST:
4675 case R_PPC64_ADDR16_HIGHESTA:
4676 case R_PPC64_ADDR16_LO:
4677 case R_PPC64_ADDR16_LO_DS:
4678 case R_PPC64_ADDR24:
4679 case R_PPC64_ADDR32:
4680 case R_PPC64_UADDR16:
4681 case R_PPC64_UADDR32:
4682 case R_PPC64_UADDR64:
4683 case R_PPC64_TOC:
4684 if (h != NULL && !info->shared)
4685 /* We may need a copy reloc. */
4686 h->non_got_ref = 1;
4687
4688 /* Don't propagate .opd relocs. */
4689 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4690 break;
4691
4692 /* If we are creating a shared library, and this is a reloc
4693 against a global symbol, or a non PC relative reloc
4694 against a local symbol, then we need to copy the reloc
4695 into the shared library. However, if we are linking with
4696 -Bsymbolic, we do not need to copy a reloc against a
4697 global symbol which is defined in an object we are
4698 including in the link (i.e., DEF_REGULAR is set). At
4699 this point we have not seen all the input files, so it is
4700 possible that DEF_REGULAR is not set now but will be set
4701 later (it is never cleared). In case of a weak definition,
4702 DEF_REGULAR may be cleared later by a strong definition in
4703 a shared library. We account for that possibility below by
4704 storing information in the dyn_relocs field of the hash
4705 table entry. A similar situation occurs when creating
4706 shared libraries and symbol visibility changes render the
4707 symbol local.
4708
4709 If on the other hand, we are creating an executable, we
4710 may need to keep relocations for symbols satisfied by a
4711 dynamic library if we manage to avoid copy relocs for the
4712 symbol. */
4713 dodyn:
4714 if ((info->shared
4715 && (MUST_BE_DYN_RELOC (r_type)
4716 || (h != NULL
4717 && (! info->symbolic
4718 || h->root.type == bfd_link_hash_defweak
4719 || !h->def_regular))))
4720 || (ELIMINATE_COPY_RELOCS
4721 && !info->shared
4722 && h != NULL
4723 && (h->root.type == bfd_link_hash_defweak
4724 || !h->def_regular)))
4725 {
4726 struct ppc_dyn_relocs *p;
4727 struct ppc_dyn_relocs **head;
4728
4729 /* We must copy these reloc types into the output file.
4730 Create a reloc section in dynobj and make room for
4731 this reloc. */
4732 if (sreloc == NULL)
4733 {
4734 const char *name;
4735 bfd *dynobj;
4736
4737 name = (bfd_elf_string_from_elf_section
4738 (abfd,
4739 elf_elfheader (abfd)->e_shstrndx,
4740 elf_section_data (sec)->rel_hdr.sh_name));
4741 if (name == NULL)
4742 return FALSE;
4743
4744 if (strncmp (name, ".rela", 5) != 0
4745 || strcmp (bfd_get_section_name (abfd, sec),
4746 name + 5) != 0)
4747 {
4748 (*_bfd_error_handler)
4749 (_("%B: bad relocation section name `%s\'"),
4750 abfd, name);
4751 bfd_set_error (bfd_error_bad_value);
4752 }
4753
4754 dynobj = htab->elf.dynobj;
4755 sreloc = bfd_get_section_by_name (dynobj, name);
4756 if (sreloc == NULL)
4757 {
4758 flagword flags;
4759
4760 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4761 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4762 | SEC_ALLOC | SEC_LOAD);
4763 sreloc = bfd_make_section_with_flags (dynobj,
4764 name,
4765 flags);
4766 if (sreloc == NULL
4767 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4768 return FALSE;
4769 }
4770 elf_section_data (sec)->sreloc = sreloc;
4771 }
4772
4773 /* If this is a global symbol, we count the number of
4774 relocations we need for this symbol. */
4775 if (h != NULL)
4776 {
4777 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4778 }
4779 else
4780 {
4781 /* Track dynamic relocs needed for local syms too.
4782 We really need local syms available to do this
4783 easily. Oh well. */
4784
4785 asection *s;
4786 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4787 sec, r_symndx);
4788 if (s == NULL)
4789 return FALSE;
4790
4791 head = ((struct ppc_dyn_relocs **)
4792 &elf_section_data (s)->local_dynrel);
4793 }
4794
4795 p = *head;
4796 if (p == NULL || p->sec != sec)
4797 {
4798 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4799 if (p == NULL)
4800 return FALSE;
4801 p->next = *head;
4802 *head = p;
4803 p->sec = sec;
4804 p->count = 0;
4805 p->pc_count = 0;
4806 }
4807
4808 p->count += 1;
4809 if (!MUST_BE_DYN_RELOC (r_type))
4810 p->pc_count += 1;
4811 }
4812 break;
4813
4814 default:
4815 break;
4816 }
4817 }
4818
4819 return TRUE;
4820 }
4821
4822 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4823 of the code entry point, and its section. */
4824
4825 static bfd_vma
4826 opd_entry_value (asection *opd_sec,
4827 bfd_vma offset,
4828 asection **code_sec,
4829 bfd_vma *code_off)
4830 {
4831 bfd *opd_bfd = opd_sec->owner;
4832 Elf_Internal_Rela *relocs;
4833 Elf_Internal_Rela *lo, *hi, *look;
4834 bfd_vma val;
4835
4836 /* No relocs implies we are linking a --just-symbols object. */
4837 if (opd_sec->reloc_count == 0)
4838 {
4839 bfd_vma val;
4840
4841 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4842 return (bfd_vma) -1;
4843
4844 if (code_sec != NULL)
4845 {
4846 asection *sec, *likely = NULL;
4847 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4848 if (sec->vma <= val
4849 && (sec->flags & SEC_LOAD) != 0
4850 && (sec->flags & SEC_ALLOC) != 0)
4851 likely = sec;
4852 if (likely != NULL)
4853 {
4854 *code_sec = likely;
4855 if (code_off != NULL)
4856 *code_off = val - likely->vma;
4857 }
4858 }
4859 return val;
4860 }
4861
4862 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4863 if (relocs == NULL)
4864 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4865
4866 /* Go find the opd reloc at the sym address. */
4867 lo = relocs;
4868 BFD_ASSERT (lo != NULL);
4869 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4870 val = (bfd_vma) -1;
4871 while (lo < hi)
4872 {
4873 look = lo + (hi - lo) / 2;
4874 if (look->r_offset < offset)
4875 lo = look + 1;
4876 else if (look->r_offset > offset)
4877 hi = look;
4878 else
4879 {
4880 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4881 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4882 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4883 {
4884 unsigned long symndx = ELF64_R_SYM (look->r_info);
4885 asection *sec;
4886
4887 if (symndx < symtab_hdr->sh_info)
4888 {
4889 Elf_Internal_Sym *sym;
4890
4891 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4892 if (sym == NULL)
4893 {
4894 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4895 symtab_hdr->sh_info,
4896 0, NULL, NULL, NULL);
4897 if (sym == NULL)
4898 break;
4899 symtab_hdr->contents = (bfd_byte *) sym;
4900 }
4901
4902 sym += symndx;
4903 val = sym->st_value;
4904 sec = NULL;
4905 if ((sym->st_shndx != SHN_UNDEF
4906 && sym->st_shndx < SHN_LORESERVE)
4907 || sym->st_shndx > SHN_HIRESERVE)
4908 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4909 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4910 }
4911 else
4912 {
4913 struct elf_link_hash_entry **sym_hashes;
4914 struct elf_link_hash_entry *rh;
4915
4916 sym_hashes = elf_sym_hashes (opd_bfd);
4917 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4918 while (rh->root.type == bfd_link_hash_indirect
4919 || rh->root.type == bfd_link_hash_warning)
4920 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4921 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4922 || rh->root.type == bfd_link_hash_defweak);
4923 val = rh->root.u.def.value;
4924 sec = rh->root.u.def.section;
4925 }
4926 val += look->r_addend;
4927 if (code_off != NULL)
4928 *code_off = val;
4929 if (code_sec != NULL)
4930 *code_sec = sec;
4931 if (sec != NULL && sec->output_section != NULL)
4932 val += sec->output_section->vma + sec->output_offset;
4933 }
4934 break;
4935 }
4936 }
4937
4938 return val;
4939 }
4940
4941 /* Return the section that should be marked against GC for a given
4942 relocation. */
4943
4944 static asection *
4945 ppc64_elf_gc_mark_hook (asection *sec,
4946 struct bfd_link_info *info,
4947 Elf_Internal_Rela *rel,
4948 struct elf_link_hash_entry *h,
4949 Elf_Internal_Sym *sym)
4950 {
4951 asection *rsec;
4952
4953 /* First mark all our entry sym sections. */
4954 if (info->gc_sym_list != NULL)
4955 {
4956 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4957 struct bfd_sym_chain *sym = info->gc_sym_list;
4958
4959 info->gc_sym_list = NULL;
4960 do
4961 {
4962 struct ppc_link_hash_entry *eh;
4963
4964 eh = (struct ppc_link_hash_entry *)
4965 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4966 if (eh == NULL)
4967 continue;
4968 if (eh->elf.root.type != bfd_link_hash_defined
4969 && eh->elf.root.type != bfd_link_hash_defweak)
4970 continue;
4971
4972 if (eh->is_func_descriptor
4973 && (eh->oh->elf.root.type == bfd_link_hash_defined
4974 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4975 rsec = eh->oh->elf.root.u.def.section;
4976 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4977 && opd_entry_value (eh->elf.root.u.def.section,
4978 eh->elf.root.u.def.value,
4979 &rsec, NULL) != (bfd_vma) -1)
4980 ;
4981 else
4982 continue;
4983
4984 if (!rsec->gc_mark)
4985 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4986
4987 rsec = eh->elf.root.u.def.section;
4988 if (!rsec->gc_mark)
4989 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4990
4991 sym = sym->next;
4992 }
4993 while (sym != NULL);
4994 }
4995
4996 /* Syms return NULL if we're marking .opd, so we avoid marking all
4997 function sections, as all functions are referenced in .opd. */
4998 rsec = NULL;
4999 if (get_opd_info (sec) != NULL)
5000 return rsec;
5001
5002 if (h != NULL)
5003 {
5004 enum elf_ppc64_reloc_type r_type;
5005 struct ppc_link_hash_entry *eh;
5006
5007 r_type = ELF64_R_TYPE (rel->r_info);
5008 switch (r_type)
5009 {
5010 case R_PPC64_GNU_VTINHERIT:
5011 case R_PPC64_GNU_VTENTRY:
5012 break;
5013
5014 default:
5015 switch (h->root.type)
5016 {
5017 case bfd_link_hash_defined:
5018 case bfd_link_hash_defweak:
5019 eh = (struct ppc_link_hash_entry *) h;
5020 if (eh->oh != NULL
5021 && eh->oh->is_func_descriptor
5022 && (eh->oh->elf.root.type == bfd_link_hash_defined
5023 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5024 eh = eh->oh;
5025
5026 /* Function descriptor syms cause the associated
5027 function code sym section to be marked. */
5028 if (eh->is_func_descriptor
5029 && (eh->oh->elf.root.type == bfd_link_hash_defined
5030 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5031 {
5032 /* They also mark their opd section. */
5033 if (!eh->elf.root.u.def.section->gc_mark)
5034 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5035 ppc64_elf_gc_mark_hook);
5036
5037 rsec = eh->oh->elf.root.u.def.section;
5038 }
5039 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5040 && opd_entry_value (eh->elf.root.u.def.section,
5041 eh->elf.root.u.def.value,
5042 &rsec, NULL) != (bfd_vma) -1)
5043 {
5044 if (!eh->elf.root.u.def.section->gc_mark)
5045 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5046 ppc64_elf_gc_mark_hook);
5047 }
5048 else
5049 rsec = h->root.u.def.section;
5050 break;
5051
5052 case bfd_link_hash_common:
5053 rsec = h->root.u.c.p->section;
5054 break;
5055
5056 default:
5057 break;
5058 }
5059 }
5060 }
5061 else
5062 {
5063 asection **opd_sym_section;
5064
5065 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5066 opd_sym_section = get_opd_info (rsec);
5067 if (opd_sym_section != NULL)
5068 {
5069 if (!rsec->gc_mark)
5070 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5071
5072 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5073 }
5074 }
5075
5076 return rsec;
5077 }
5078
5079 /* Update the .got, .plt. and dynamic reloc reference counts for the
5080 section being removed. */
5081
5082 static bfd_boolean
5083 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5084 asection *sec, const Elf_Internal_Rela *relocs)
5085 {
5086 struct ppc_link_hash_table *htab;
5087 Elf_Internal_Shdr *symtab_hdr;
5088 struct elf_link_hash_entry **sym_hashes;
5089 struct got_entry **local_got_ents;
5090 const Elf_Internal_Rela *rel, *relend;
5091
5092 if ((sec->flags & SEC_ALLOC) == 0)
5093 return TRUE;
5094
5095 elf_section_data (sec)->local_dynrel = NULL;
5096
5097 htab = ppc_hash_table (info);
5098 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5099 sym_hashes = elf_sym_hashes (abfd);
5100 local_got_ents = elf_local_got_ents (abfd);
5101
5102 relend = relocs + sec->reloc_count;
5103 for (rel = relocs; rel < relend; rel++)
5104 {
5105 unsigned long r_symndx;
5106 enum elf_ppc64_reloc_type r_type;
5107 struct elf_link_hash_entry *h = NULL;
5108 char tls_type = 0;
5109
5110 r_symndx = ELF64_R_SYM (rel->r_info);
5111 r_type = ELF64_R_TYPE (rel->r_info);
5112 if (r_symndx >= symtab_hdr->sh_info)
5113 {
5114 struct ppc_link_hash_entry *eh;
5115 struct ppc_dyn_relocs **pp;
5116 struct ppc_dyn_relocs *p;
5117
5118 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5119 while (h->root.type == bfd_link_hash_indirect
5120 || h->root.type == bfd_link_hash_warning)
5121 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5122 eh = (struct ppc_link_hash_entry *) h;
5123
5124 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5125 if (p->sec == sec)
5126 {
5127 /* Everything must go for SEC. */
5128 *pp = p->next;
5129 break;
5130 }
5131 }
5132
5133 switch (r_type)
5134 {
5135 case R_PPC64_GOT_TLSLD16:
5136 case R_PPC64_GOT_TLSLD16_LO:
5137 case R_PPC64_GOT_TLSLD16_HI:
5138 case R_PPC64_GOT_TLSLD16_HA:
5139 ppc64_tlsld_got (abfd)->refcount -= 1;
5140 tls_type = TLS_TLS | TLS_LD;
5141 goto dogot;
5142
5143 case R_PPC64_GOT_TLSGD16:
5144 case R_PPC64_GOT_TLSGD16_LO:
5145 case R_PPC64_GOT_TLSGD16_HI:
5146 case R_PPC64_GOT_TLSGD16_HA:
5147 tls_type = TLS_TLS | TLS_GD;
5148 goto dogot;
5149
5150 case R_PPC64_GOT_TPREL16_DS:
5151 case R_PPC64_GOT_TPREL16_LO_DS:
5152 case R_PPC64_GOT_TPREL16_HI:
5153 case R_PPC64_GOT_TPREL16_HA:
5154 tls_type = TLS_TLS | TLS_TPREL;
5155 goto dogot;
5156
5157 case R_PPC64_GOT_DTPREL16_DS:
5158 case R_PPC64_GOT_DTPREL16_LO_DS:
5159 case R_PPC64_GOT_DTPREL16_HI:
5160 case R_PPC64_GOT_DTPREL16_HA:
5161 tls_type = TLS_TLS | TLS_DTPREL;
5162 goto dogot;
5163
5164 case R_PPC64_GOT16:
5165 case R_PPC64_GOT16_DS:
5166 case R_PPC64_GOT16_HA:
5167 case R_PPC64_GOT16_HI:
5168 case R_PPC64_GOT16_LO:
5169 case R_PPC64_GOT16_LO_DS:
5170 dogot:
5171 {
5172 struct got_entry *ent;
5173
5174 if (h != NULL)
5175 ent = h->got.glist;
5176 else
5177 ent = local_got_ents[r_symndx];
5178
5179 for (; ent != NULL; ent = ent->next)
5180 if (ent->addend == rel->r_addend
5181 && ent->owner == abfd
5182 && ent->tls_type == tls_type)
5183 break;
5184 if (ent == NULL)
5185 abort ();
5186 if (ent->got.refcount > 0)
5187 ent->got.refcount -= 1;
5188 }
5189 break;
5190
5191 case R_PPC64_PLT16_HA:
5192 case R_PPC64_PLT16_HI:
5193 case R_PPC64_PLT16_LO:
5194 case R_PPC64_PLT32:
5195 case R_PPC64_PLT64:
5196 case R_PPC64_REL14:
5197 case R_PPC64_REL14_BRNTAKEN:
5198 case R_PPC64_REL14_BRTAKEN:
5199 case R_PPC64_REL24:
5200 if (h != NULL)
5201 {
5202 struct plt_entry *ent;
5203
5204 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5205 if (ent->addend == rel->r_addend)
5206 break;
5207 if (ent == NULL)
5208 abort ();
5209 if (ent->plt.refcount > 0)
5210 ent->plt.refcount -= 1;
5211 }
5212 break;
5213
5214 default:
5215 break;
5216 }
5217 }
5218 return TRUE;
5219 }
5220
5221 /* The maximum size of .sfpr. */
5222 #define SFPR_MAX (218*4)
5223
5224 struct sfpr_def_parms
5225 {
5226 const char name[12];
5227 unsigned char lo, hi;
5228 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5229 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5230 };
5231
5232 /* Auto-generate _save*, _rest* functions in .sfpr. */
5233
5234 static unsigned int
5235 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5236 {
5237 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5238 unsigned int i;
5239 size_t len = strlen (parm->name);
5240 bfd_boolean writing = FALSE;
5241 char sym[16];
5242
5243 memcpy (sym, parm->name, len);
5244 sym[len + 2] = 0;
5245
5246 for (i = parm->lo; i <= parm->hi; i++)
5247 {
5248 struct elf_link_hash_entry *h;
5249
5250 sym[len + 0] = i / 10 + '0';
5251 sym[len + 1] = i % 10 + '0';
5252 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5253 if (h != NULL
5254 && !h->def_regular)
5255 {
5256 h->root.type = bfd_link_hash_defined;
5257 h->root.u.def.section = htab->sfpr;
5258 h->root.u.def.value = htab->sfpr->size;
5259 h->type = STT_FUNC;
5260 h->def_regular = 1;
5261 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5262 writing = TRUE;
5263 if (htab->sfpr->contents == NULL)
5264 {
5265 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5266 if (htab->sfpr->contents == NULL)
5267 return FALSE;
5268 }
5269 }
5270 if (writing)
5271 {
5272 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5273 if (i != parm->hi)
5274 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5275 else
5276 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5277 htab->sfpr->size = p - htab->sfpr->contents;
5278 }
5279 }
5280
5281 return TRUE;
5282 }
5283
5284 static bfd_byte *
5285 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5286 {
5287 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5288 return p + 4;
5289 }
5290
5291 static bfd_byte *
5292 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5293 {
5294 p = savegpr0 (abfd, p, r);
5295 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5296 p = p + 4;
5297 bfd_put_32 (abfd, BLR, p);
5298 return p + 4;
5299 }
5300
5301 static bfd_byte *
5302 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5303 {
5304 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5305 return p + 4;
5306 }
5307
5308 static bfd_byte *
5309 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5310 {
5311 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5312 p = p + 4;
5313 p = restgpr0 (abfd, p, r);
5314 bfd_put_32 (abfd, MTLR_R0, p);
5315 p = p + 4;
5316 if (r == 29)
5317 {
5318 p = restgpr0 (abfd, p, 30);
5319 p = restgpr0 (abfd, p, 31);
5320 }
5321 bfd_put_32 (abfd, BLR, p);
5322 return p + 4;
5323 }
5324
5325 static bfd_byte *
5326 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5327 {
5328 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5329 return p + 4;
5330 }
5331
5332 static bfd_byte *
5333 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5334 {
5335 p = savegpr1 (abfd, p, r);
5336 bfd_put_32 (abfd, BLR, p);
5337 return p + 4;
5338 }
5339
5340 static bfd_byte *
5341 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5342 {
5343 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5344 return p + 4;
5345 }
5346
5347 static bfd_byte *
5348 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5349 {
5350 p = restgpr1 (abfd, p, r);
5351 bfd_put_32 (abfd, BLR, p);
5352 return p + 4;
5353 }
5354
5355 static bfd_byte *
5356 savefpr (bfd *abfd, bfd_byte *p, int r)
5357 {
5358 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5359 return p + 4;
5360 }
5361
5362 static bfd_byte *
5363 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5364 {
5365 p = savefpr (abfd, p, r);
5366 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5367 p = p + 4;
5368 bfd_put_32 (abfd, BLR, p);
5369 return p + 4;
5370 }
5371
5372 static bfd_byte *
5373 restfpr (bfd *abfd, bfd_byte *p, int r)
5374 {
5375 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5376 return p + 4;
5377 }
5378
5379 static bfd_byte *
5380 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5381 {
5382 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5383 p = p + 4;
5384 p = restfpr (abfd, p, r);
5385 bfd_put_32 (abfd, MTLR_R0, p);
5386 p = p + 4;
5387 if (r == 29)
5388 {
5389 p = restfpr (abfd, p, 30);
5390 p = restfpr (abfd, p, 31);
5391 }
5392 bfd_put_32 (abfd, BLR, p);
5393 return p + 4;
5394 }
5395
5396 static bfd_byte *
5397 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5398 {
5399 p = savefpr (abfd, p, r);
5400 bfd_put_32 (abfd, BLR, p);
5401 return p + 4;
5402 }
5403
5404 static bfd_byte *
5405 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5406 {
5407 p = restfpr (abfd, p, r);
5408 bfd_put_32 (abfd, BLR, p);
5409 return p + 4;
5410 }
5411
5412 static bfd_byte *
5413 savevr (bfd *abfd, bfd_byte *p, int r)
5414 {
5415 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5416 p = p + 4;
5417 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5418 return p + 4;
5419 }
5420
5421 static bfd_byte *
5422 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5423 {
5424 p = savevr (abfd, p, r);
5425 bfd_put_32 (abfd, BLR, p);
5426 return p + 4;
5427 }
5428
5429 static bfd_byte *
5430 restvr (bfd *abfd, bfd_byte *p, int r)
5431 {
5432 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5433 p = p + 4;
5434 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5435 return p + 4;
5436 }
5437
5438 static bfd_byte *
5439 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5440 {
5441 p = restvr (abfd, p, r);
5442 bfd_put_32 (abfd, BLR, p);
5443 return p + 4;
5444 }
5445
5446 /* Called via elf_link_hash_traverse to transfer dynamic linking
5447 information on function code symbol entries to their corresponding
5448 function descriptor symbol entries. */
5449
5450 static bfd_boolean
5451 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5452 {
5453 struct bfd_link_info *info;
5454 struct ppc_link_hash_table *htab;
5455 struct plt_entry *ent;
5456 struct ppc_link_hash_entry *fh;
5457 struct ppc_link_hash_entry *fdh;
5458 bfd_boolean force_local;
5459
5460 fh = (struct ppc_link_hash_entry *) h;
5461 if (fh->elf.root.type == bfd_link_hash_indirect)
5462 return TRUE;
5463
5464 if (fh->elf.root.type == bfd_link_hash_warning)
5465 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5466
5467 info = inf;
5468 htab = ppc_hash_table (info);
5469
5470 /* Resolve undefined references to dot-symbols as the value
5471 in the function descriptor, if we have one in a regular object.
5472 This is to satisfy cases like ".quad .foo". Calls to functions
5473 in dynamic objects are handled elsewhere. */
5474 if (fh->elf.root.type == bfd_link_hash_undefweak
5475 && fh->was_undefined
5476 && (fh->oh->elf.root.type == bfd_link_hash_defined
5477 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5478 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5479 && opd_entry_value (fh->oh->elf.root.u.def.section,
5480 fh->oh->elf.root.u.def.value,
5481 &fh->elf.root.u.def.section,
5482 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5483 {
5484 fh->elf.root.type = fh->oh->elf.root.type;
5485 fh->elf.forced_local = 1;
5486 }
5487
5488 /* If this is a function code symbol, transfer dynamic linking
5489 information to the function descriptor symbol. */
5490 if (!fh->is_func)
5491 return TRUE;
5492
5493 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5494 if (ent->plt.refcount > 0)
5495 break;
5496 if (ent == NULL
5497 || fh->elf.root.root.string[0] != '.'
5498 || fh->elf.root.root.string[1] == '\0')
5499 return TRUE;
5500
5501 /* Find the corresponding function descriptor symbol. Create it
5502 as undefined if necessary. */
5503
5504 fdh = get_fdh (fh, htab);
5505 if (fdh != NULL)
5506 while (fdh->elf.root.type == bfd_link_hash_indirect
5507 || fdh->elf.root.type == bfd_link_hash_warning)
5508 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5509
5510 if (fdh == NULL
5511 && info->shared
5512 && (fh->elf.root.type == bfd_link_hash_undefined
5513 || fh->elf.root.type == bfd_link_hash_undefweak))
5514 {
5515 fdh = make_fdh (info, fh);
5516 if (fdh == NULL)
5517 return FALSE;
5518 }
5519
5520 /* Fake function descriptors are made undefweak. If the function
5521 code symbol is strong undefined, make the fake sym the same.
5522 If the function code symbol is defined, then force the fake
5523 descriptor local; We can't support overriding of symbols in a
5524 shared library on a fake descriptor. */
5525
5526 if (fdh != NULL
5527 && fdh->fake
5528 && fdh->elf.root.type == bfd_link_hash_undefweak)
5529 {
5530 if (fh->elf.root.type == bfd_link_hash_undefined)
5531 {
5532 fdh->elf.root.type = bfd_link_hash_undefined;
5533 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5534 }
5535 else if (fh->elf.root.type == bfd_link_hash_defined
5536 || fh->elf.root.type == bfd_link_hash_defweak)
5537 {
5538 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5539 }
5540 }
5541
5542 if (fdh != NULL
5543 && !fdh->elf.forced_local
5544 && (info->shared
5545 || fdh->elf.def_dynamic
5546 || fdh->elf.ref_dynamic
5547 || (fdh->elf.root.type == bfd_link_hash_undefweak
5548 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5549 {
5550 if (fdh->elf.dynindx == -1)
5551 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5552 return FALSE;
5553 fdh->elf.ref_regular |= fh->elf.ref_regular;
5554 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5555 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5556 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5557 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5558 {
5559 move_plt_plist (fh, fdh);
5560 fdh->elf.needs_plt = 1;
5561 }
5562 fdh->is_func_descriptor = 1;
5563 fdh->oh = fh;
5564 fh->oh = fdh;
5565 }
5566
5567 /* Now that the info is on the function descriptor, clear the
5568 function code sym info. Any function code syms for which we
5569 don't have a definition in a regular file, we force local.
5570 This prevents a shared library from exporting syms that have
5571 been imported from another library. Function code syms that
5572 are really in the library we must leave global to prevent the
5573 linker dragging in a definition from a static library. */
5574 force_local = (!fh->elf.def_regular
5575 || fdh == NULL
5576 || !fdh->elf.def_regular
5577 || fdh->elf.forced_local);
5578 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5579
5580 return TRUE;
5581 }
5582
5583 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5584 this hook to a) provide some gcc support functions, and b) transfer
5585 dynamic linking information gathered so far on function code symbol
5586 entries, to their corresponding function descriptor symbol entries. */
5587
5588 static bfd_boolean
5589 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5590 struct bfd_link_info *info)
5591 {
5592 struct ppc_link_hash_table *htab;
5593 unsigned int i;
5594 const struct sfpr_def_parms funcs[] =
5595 {
5596 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5597 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5598 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5599 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5600 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5601 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5602 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5603 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5604 { "._savef", 14, 31, savefpr, savefpr1_tail },
5605 { "._restf", 14, 31, restfpr, restfpr1_tail },
5606 { "_savevr_", 20, 31, savevr, savevr_tail },
5607 { "_restvr_", 20, 31, restvr, restvr_tail }
5608 };
5609
5610 htab = ppc_hash_table (info);
5611 if (htab->sfpr == NULL)
5612 /* We don't have any relocs. */
5613 return TRUE;
5614
5615 /* Provide any missing _save* and _rest* functions. */
5616 htab->sfpr->size = 0;
5617 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5618 if (!sfpr_define (info, &funcs[i]))
5619 return FALSE;
5620
5621 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5622
5623 if (htab->sfpr->size == 0)
5624 htab->sfpr->flags |= SEC_EXCLUDE;
5625
5626 return TRUE;
5627 }
5628
5629 /* Adjust a symbol defined by a dynamic object and referenced by a
5630 regular object. The current definition is in some section of the
5631 dynamic object, but we're not including those sections. We have to
5632 change the definition to something the rest of the link can
5633 understand. */
5634
5635 static bfd_boolean
5636 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5637 struct elf_link_hash_entry *h)
5638 {
5639 struct ppc_link_hash_table *htab;
5640 asection *s;
5641 unsigned int power_of_two;
5642
5643 htab = ppc_hash_table (info);
5644
5645 /* Deal with function syms. */
5646 if (h->type == STT_FUNC
5647 || h->needs_plt)
5648 {
5649 /* Clear procedure linkage table information for any symbol that
5650 won't need a .plt entry. */
5651 struct plt_entry *ent;
5652 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5653 if (ent->plt.refcount > 0)
5654 break;
5655 if (ent == NULL
5656 || SYMBOL_CALLS_LOCAL (info, h)
5657 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5658 && h->root.type == bfd_link_hash_undefweak))
5659 {
5660 h->plt.plist = NULL;
5661 h->needs_plt = 0;
5662 }
5663 }
5664 else
5665 h->plt.plist = NULL;
5666
5667 /* If this is a weak symbol, and there is a real definition, the
5668 processor independent code will have arranged for us to see the
5669 real definition first, and we can just use the same value. */
5670 if (h->u.weakdef != NULL)
5671 {
5672 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5673 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5674 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5675 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5676 if (ELIMINATE_COPY_RELOCS)
5677 h->non_got_ref = h->u.weakdef->non_got_ref;
5678 return TRUE;
5679 }
5680
5681 /* If we are creating a shared library, we must presume that the
5682 only references to the symbol are via the global offset table.
5683 For such cases we need not do anything here; the relocations will
5684 be handled correctly by relocate_section. */
5685 if (info->shared)
5686 return TRUE;
5687
5688 /* If there are no references to this symbol that do not use the
5689 GOT, we don't need to generate a copy reloc. */
5690 if (!h->non_got_ref)
5691 return TRUE;
5692
5693 if (ELIMINATE_COPY_RELOCS)
5694 {
5695 struct ppc_link_hash_entry * eh;
5696 struct ppc_dyn_relocs *p;
5697
5698 eh = (struct ppc_link_hash_entry *) h;
5699 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5700 {
5701 s = p->sec->output_section;
5702 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5703 break;
5704 }
5705
5706 /* If we didn't find any dynamic relocs in read-only sections, then
5707 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5708 if (p == NULL)
5709 {
5710 h->non_got_ref = 0;
5711 return TRUE;
5712 }
5713 }
5714
5715 if (h->plt.plist != NULL)
5716 {
5717 /* We should never get here, but unfortunately there are versions
5718 of gcc out there that improperly (for this ABI) put initialized
5719 function pointers, vtable refs and suchlike in read-only
5720 sections. Allow them to proceed, but warn that this might
5721 break at runtime. */
5722 (*_bfd_error_handler)
5723 (_("copy reloc against `%s' requires lazy plt linking; "
5724 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5725 h->root.root.string);
5726 }
5727
5728 /* This is a reference to a symbol defined by a dynamic object which
5729 is not a function. */
5730
5731 /* We must allocate the symbol in our .dynbss section, which will
5732 become part of the .bss section of the executable. There will be
5733 an entry for this symbol in the .dynsym section. The dynamic
5734 object will contain position independent code, so all references
5735 from the dynamic object to this symbol will go through the global
5736 offset table. The dynamic linker will use the .dynsym entry to
5737 determine the address it must put in the global offset table, so
5738 both the dynamic object and the regular object will refer to the
5739 same memory location for the variable. */
5740
5741 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5742 to copy the initial value out of the dynamic object and into the
5743 runtime process image. We need to remember the offset into the
5744 .rela.bss section we are going to use. */
5745 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5746 {
5747 htab->relbss->size += sizeof (Elf64_External_Rela);
5748 h->needs_copy = 1;
5749 }
5750
5751 /* We need to figure out the alignment required for this symbol. I
5752 have no idea how ELF linkers handle this. */
5753 power_of_two = bfd_log2 (h->size);
5754 if (power_of_two > 4)
5755 power_of_two = 4;
5756
5757 /* Apply the required alignment. */
5758 s = htab->dynbss;
5759 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5760 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5761 {
5762 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5763 return FALSE;
5764 }
5765
5766 /* Define the symbol as being at this point in the section. */
5767 h->root.u.def.section = s;
5768 h->root.u.def.value = s->size;
5769
5770 /* Increment the section size to make room for the symbol. */
5771 s->size += h->size;
5772
5773 return TRUE;
5774 }
5775
5776 /* If given a function descriptor symbol, hide both the function code
5777 sym and the descriptor. */
5778 static void
5779 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5780 struct elf_link_hash_entry *h,
5781 bfd_boolean force_local)
5782 {
5783 struct ppc_link_hash_entry *eh;
5784 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5785
5786 eh = (struct ppc_link_hash_entry *) h;
5787 if (eh->is_func_descriptor)
5788 {
5789 struct ppc_link_hash_entry *fh = eh->oh;
5790
5791 if (fh == NULL)
5792 {
5793 const char *p, *q;
5794 struct ppc_link_hash_table *htab;
5795 char save;
5796
5797 /* We aren't supposed to use alloca in BFD because on
5798 systems which do not have alloca the version in libiberty
5799 calls xmalloc, which might cause the program to crash
5800 when it runs out of memory. This function doesn't have a
5801 return status, so there's no way to gracefully return an
5802 error. So cheat. We know that string[-1] can be safely
5803 accessed; It's either a string in an ELF string table,
5804 or allocated in an objalloc structure. */
5805
5806 p = eh->elf.root.root.string - 1;
5807 save = *p;
5808 *(char *) p = '.';
5809 htab = ppc_hash_table (info);
5810 fh = (struct ppc_link_hash_entry *)
5811 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5812 *(char *) p = save;
5813
5814 /* Unfortunately, if it so happens that the string we were
5815 looking for was allocated immediately before this string,
5816 then we overwrote the string terminator. That's the only
5817 reason the lookup should fail. */
5818 if (fh == NULL)
5819 {
5820 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5821 while (q >= eh->elf.root.root.string && *q == *p)
5822 --q, --p;
5823 if (q < eh->elf.root.root.string && *p == '.')
5824 fh = (struct ppc_link_hash_entry *)
5825 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5826 }
5827 if (fh != NULL)
5828 {
5829 eh->oh = fh;
5830 fh->oh = eh;
5831 }
5832 }
5833 if (fh != NULL)
5834 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5835 }
5836 }
5837
5838 static bfd_boolean
5839 get_sym_h (struct elf_link_hash_entry **hp,
5840 Elf_Internal_Sym **symp,
5841 asection **symsecp,
5842 char **tls_maskp,
5843 Elf_Internal_Sym **locsymsp,
5844 unsigned long r_symndx,
5845 bfd *ibfd)
5846 {
5847 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5848
5849 if (r_symndx >= symtab_hdr->sh_info)
5850 {
5851 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5852 struct elf_link_hash_entry *h;
5853
5854 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5855 while (h->root.type == bfd_link_hash_indirect
5856 || h->root.type == bfd_link_hash_warning)
5857 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5858
5859 if (hp != NULL)
5860 *hp = h;
5861
5862 if (symp != NULL)
5863 *symp = NULL;
5864
5865 if (symsecp != NULL)
5866 {
5867 asection *symsec = NULL;
5868 if (h->root.type == bfd_link_hash_defined
5869 || h->root.type == bfd_link_hash_defweak)
5870 symsec = h->root.u.def.section;
5871 *symsecp = symsec;
5872 }
5873
5874 if (tls_maskp != NULL)
5875 {
5876 struct ppc_link_hash_entry *eh;
5877
5878 eh = (struct ppc_link_hash_entry *) h;
5879 *tls_maskp = &eh->tls_mask;
5880 }
5881 }
5882 else
5883 {
5884 Elf_Internal_Sym *sym;
5885 Elf_Internal_Sym *locsyms = *locsymsp;
5886
5887 if (locsyms == NULL)
5888 {
5889 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5890 if (locsyms == NULL)
5891 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5892 symtab_hdr->sh_info,
5893 0, NULL, NULL, NULL);
5894 if (locsyms == NULL)
5895 return FALSE;
5896 *locsymsp = locsyms;
5897 }
5898 sym = locsyms + r_symndx;
5899
5900 if (hp != NULL)
5901 *hp = NULL;
5902
5903 if (symp != NULL)
5904 *symp = sym;
5905
5906 if (symsecp != NULL)
5907 {
5908 asection *symsec = NULL;
5909 if ((sym->st_shndx != SHN_UNDEF
5910 && sym->st_shndx < SHN_LORESERVE)
5911 || sym->st_shndx > SHN_HIRESERVE)
5912 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5913 *symsecp = symsec;
5914 }
5915
5916 if (tls_maskp != NULL)
5917 {
5918 struct got_entry **lgot_ents;
5919 char *tls_mask;
5920
5921 tls_mask = NULL;
5922 lgot_ents = elf_local_got_ents (ibfd);
5923 if (lgot_ents != NULL)
5924 {
5925 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5926 tls_mask = &lgot_masks[r_symndx];
5927 }
5928 *tls_maskp = tls_mask;
5929 }
5930 }
5931 return TRUE;
5932 }
5933
5934 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5935 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5936 type suitable for optimization, and 1 otherwise. */
5937
5938 static int
5939 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5940 Elf_Internal_Sym **locsymsp,
5941 const Elf_Internal_Rela *rel, bfd *ibfd)
5942 {
5943 unsigned long r_symndx;
5944 int next_r;
5945 struct elf_link_hash_entry *h;
5946 Elf_Internal_Sym *sym;
5947 asection *sec;
5948 bfd_vma off;
5949
5950 r_symndx = ELF64_R_SYM (rel->r_info);
5951 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5952 return 0;
5953
5954 if ((*tls_maskp != NULL && **tls_maskp != 0)
5955 || sec == NULL
5956 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5957 return 1;
5958
5959 /* Look inside a TOC section too. */
5960 if (h != NULL)
5961 {
5962 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5963 off = h->root.u.def.value;
5964 }
5965 else
5966 off = sym->st_value;
5967 off += rel->r_addend;
5968 BFD_ASSERT (off % 8 == 0);
5969 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5970 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5971 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5972 return 0;
5973 if (toc_symndx != NULL)
5974 *toc_symndx = r_symndx;
5975 if ((h == NULL
5976 || ((h->root.type == bfd_link_hash_defined
5977 || h->root.type == bfd_link_hash_defweak)
5978 && !h->def_dynamic))
5979 && (next_r == -1 || next_r == -2))
5980 return 1 - next_r;
5981 return 1;
5982 }
5983
5984 /* Adjust all global syms defined in opd sections. In gcc generated
5985 code for the old ABI, these will already have been done. */
5986
5987 static bfd_boolean
5988 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5989 {
5990 struct ppc_link_hash_entry *eh;
5991 asection *sym_sec;
5992 long *opd_adjust;
5993
5994 if (h->root.type == bfd_link_hash_indirect)
5995 return TRUE;
5996
5997 if (h->root.type == bfd_link_hash_warning)
5998 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5999
6000 if (h->root.type != bfd_link_hash_defined
6001 && h->root.type != bfd_link_hash_defweak)
6002 return TRUE;
6003
6004 eh = (struct ppc_link_hash_entry *) h;
6005 if (eh->adjust_done)
6006 return TRUE;
6007
6008 sym_sec = eh->elf.root.u.def.section;
6009 opd_adjust = get_opd_info (sym_sec);
6010 if (opd_adjust != NULL)
6011 {
6012 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6013 if (adjust == -1)
6014 {
6015 /* This entry has been deleted. */
6016 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->u.deleted_section;
6017 if (dsec == NULL)
6018 {
6019 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6020 if (elf_discarded_section (dsec))
6021 {
6022 ppc64_elf_tdata (sym_sec->owner)->u.deleted_section = dsec;
6023 break;
6024 }
6025 }
6026 eh->elf.root.u.def.value = 0;
6027 eh->elf.root.u.def.section = dsec;
6028 }
6029 else
6030 eh->elf.root.u.def.value += adjust;
6031 eh->adjust_done = 1;
6032 }
6033 return TRUE;
6034 }
6035
6036 /* Handles decrementing dynamic reloc counts for the reloc specified by
6037 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6038 have already been determined. */
6039
6040 static bfd_boolean
6041 dec_dynrel_count (bfd_vma r_info,
6042 asection *sec,
6043 struct bfd_link_info *info,
6044 Elf_Internal_Sym **local_syms,
6045 struct elf_link_hash_entry *h,
6046 asection *sym_sec)
6047 {
6048 enum elf_ppc64_reloc_type r_type;
6049 struct ppc_dyn_relocs *p;
6050 struct ppc_dyn_relocs **pp;
6051
6052 /* Can this reloc be dynamic? This switch, and later tests here
6053 should be kept in sync with the code in check_relocs. */
6054 r_type = ELF64_R_TYPE (r_info);
6055 switch (r_type)
6056 {
6057 default:
6058 return TRUE;
6059
6060 case R_PPC64_TPREL16:
6061 case R_PPC64_TPREL16_LO:
6062 case R_PPC64_TPREL16_HI:
6063 case R_PPC64_TPREL16_HA:
6064 case R_PPC64_TPREL16_DS:
6065 case R_PPC64_TPREL16_LO_DS:
6066 case R_PPC64_TPREL16_HIGHER:
6067 case R_PPC64_TPREL16_HIGHERA:
6068 case R_PPC64_TPREL16_HIGHEST:
6069 case R_PPC64_TPREL16_HIGHESTA:
6070 if (!info->shared)
6071 return TRUE;
6072
6073 case R_PPC64_TPREL64:
6074 case R_PPC64_DTPMOD64:
6075 case R_PPC64_DTPREL64:
6076 case R_PPC64_ADDR64:
6077 case R_PPC64_REL30:
6078 case R_PPC64_REL32:
6079 case R_PPC64_REL64:
6080 case R_PPC64_ADDR14:
6081 case R_PPC64_ADDR14_BRNTAKEN:
6082 case R_PPC64_ADDR14_BRTAKEN:
6083 case R_PPC64_ADDR16:
6084 case R_PPC64_ADDR16_DS:
6085 case R_PPC64_ADDR16_HA:
6086 case R_PPC64_ADDR16_HI:
6087 case R_PPC64_ADDR16_HIGHER:
6088 case R_PPC64_ADDR16_HIGHERA:
6089 case R_PPC64_ADDR16_HIGHEST:
6090 case R_PPC64_ADDR16_HIGHESTA:
6091 case R_PPC64_ADDR16_LO:
6092 case R_PPC64_ADDR16_LO_DS:
6093 case R_PPC64_ADDR24:
6094 case R_PPC64_ADDR32:
6095 case R_PPC64_UADDR16:
6096 case R_PPC64_UADDR32:
6097 case R_PPC64_UADDR64:
6098 case R_PPC64_TOC:
6099 break;
6100 }
6101
6102 if (local_syms != NULL)
6103 {
6104 unsigned long r_symndx;
6105 Elf_Internal_Sym *sym;
6106 bfd *ibfd = sec->owner;
6107
6108 r_symndx = ELF64_R_SYM (r_info);
6109 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6110 return FALSE;
6111 }
6112
6113 if ((info->shared
6114 && (MUST_BE_DYN_RELOC (r_type)
6115 || (h != NULL
6116 && (!info->symbolic
6117 || h->root.type == bfd_link_hash_defweak
6118 || !h->def_regular))))
6119 || (ELIMINATE_COPY_RELOCS
6120 && !info->shared
6121 && h != NULL
6122 && (h->root.type == bfd_link_hash_defweak
6123 || !h->def_regular)))
6124 ;
6125 else
6126 return TRUE;
6127
6128 if (h != NULL)
6129 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6130 else if (sym_sec != NULL)
6131 pp = (struct ppc_dyn_relocs **) &elf_section_data (sym_sec)->local_dynrel;
6132 else
6133 pp = (struct ppc_dyn_relocs **) &elf_section_data (sec)->local_dynrel;
6134
6135 while ((p = *pp) != NULL)
6136 {
6137 if (p->sec == sec)
6138 {
6139 if (!MUST_BE_DYN_RELOC (r_type))
6140 p->pc_count -= 1;
6141 p->count -= 1;
6142 if (p->count == 0)
6143 *pp = p->next;
6144 return TRUE;
6145 }
6146 pp = &p->next;
6147 }
6148
6149 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6150 sec->owner, sec);
6151 bfd_set_error (bfd_error_bad_value);
6152 return FALSE;
6153 }
6154
6155 /* Remove unused Official Procedure Descriptor entries. Currently we
6156 only remove those associated with functions in discarded link-once
6157 sections, or weakly defined functions that have been overridden. It
6158 would be possible to remove many more entries for statically linked
6159 applications. */
6160
6161 bfd_boolean
6162 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6163 bfd_boolean no_opd_opt,
6164 bfd_boolean non_overlapping)
6165 {
6166 bfd *ibfd;
6167 bfd_boolean some_edited = FALSE;
6168 asection *need_pad = NULL;
6169
6170 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6171 {
6172 asection *sec;
6173 Elf_Internal_Rela *relstart, *rel, *relend;
6174 Elf_Internal_Shdr *symtab_hdr;
6175 Elf_Internal_Sym *local_syms;
6176 struct elf_link_hash_entry **sym_hashes;
6177 bfd_vma offset;
6178 bfd_size_type amt;
6179 long *opd_adjust;
6180 bfd_boolean need_edit, add_aux_fields;
6181 bfd_size_type cnt_16b = 0;
6182
6183 sec = bfd_get_section_by_name (ibfd, ".opd");
6184 if (sec == NULL || sec->size == 0)
6185 continue;
6186
6187 amt = sec->size * sizeof (long) / 8;
6188 opd_adjust = get_opd_info (sec);
6189 if (opd_adjust == NULL)
6190 {
6191 /* check_relocs hasn't been called. Must be a ld -r link
6192 or --just-symbols object. */
6193 opd_adjust = bfd_alloc (obfd, amt);
6194 if (opd_adjust == NULL)
6195 return FALSE;
6196 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6197 }
6198 memset (opd_adjust, 0, amt);
6199
6200 if (no_opd_opt)
6201 continue;
6202
6203 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6204 continue;
6205
6206 if (sec->output_section == bfd_abs_section_ptr)
6207 continue;
6208
6209 /* Look through the section relocs. */
6210 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6211 continue;
6212
6213 local_syms = NULL;
6214 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6215 sym_hashes = elf_sym_hashes (ibfd);
6216
6217 /* Read the relocations. */
6218 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6219 info->keep_memory);
6220 if (relstart == NULL)
6221 return FALSE;
6222
6223 /* First run through the relocs to check they are sane, and to
6224 determine whether we need to edit this opd section. */
6225 need_edit = FALSE;
6226 need_pad = sec;
6227 offset = 0;
6228 relend = relstart + sec->reloc_count;
6229 for (rel = relstart; rel < relend; )
6230 {
6231 enum elf_ppc64_reloc_type r_type;
6232 unsigned long r_symndx;
6233 asection *sym_sec;
6234 struct elf_link_hash_entry *h;
6235 Elf_Internal_Sym *sym;
6236
6237 /* .opd contains a regular array of 16 or 24 byte entries. We're
6238 only interested in the reloc pointing to a function entry
6239 point. */
6240 if (rel->r_offset != offset
6241 || rel + 1 >= relend
6242 || (rel + 1)->r_offset != offset + 8)
6243 {
6244 /* If someone messes with .opd alignment then after a
6245 "ld -r" we might have padding in the middle of .opd.
6246 Also, there's nothing to prevent someone putting
6247 something silly in .opd with the assembler. No .opd
6248 optimization for them! */
6249 broken_opd:
6250 (*_bfd_error_handler)
6251 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6252 need_edit = FALSE;
6253 break;
6254 }
6255
6256 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6257 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6258 {
6259 (*_bfd_error_handler)
6260 (_("%B: unexpected reloc type %u in .opd section"),
6261 ibfd, r_type);
6262 need_edit = FALSE;
6263 break;
6264 }
6265
6266 r_symndx = ELF64_R_SYM (rel->r_info);
6267 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6268 r_symndx, ibfd))
6269 goto error_ret;
6270
6271 if (sym_sec == NULL || sym_sec->owner == NULL)
6272 {
6273 const char *sym_name;
6274 if (h != NULL)
6275 sym_name = h->root.root.string;
6276 else
6277 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6278 sym_sec);
6279
6280 (*_bfd_error_handler)
6281 (_("%B: undefined sym `%s' in .opd section"),
6282 ibfd, sym_name);
6283 need_edit = FALSE;
6284 break;
6285 }
6286
6287 /* opd entries are always for functions defined in the
6288 current input bfd. If the symbol isn't defined in the
6289 input bfd, then we won't be using the function in this
6290 bfd; It must be defined in a linkonce section in another
6291 bfd, or is weak. It's also possible that we are
6292 discarding the function due to a linker script /DISCARD/,
6293 which we test for via the output_section. */
6294 if (sym_sec->owner != ibfd
6295 || sym_sec->output_section == bfd_abs_section_ptr)
6296 need_edit = TRUE;
6297
6298 rel += 2;
6299 if (rel == relend
6300 || (rel + 1 == relend && rel->r_offset == offset + 16))
6301 {
6302 if (sec->size == offset + 24)
6303 {
6304 need_pad = NULL;
6305 break;
6306 }
6307 if (rel == relend && sec->size == offset + 16)
6308 {
6309 cnt_16b++;
6310 break;
6311 }
6312 goto broken_opd;
6313 }
6314
6315 if (rel->r_offset == offset + 24)
6316 offset += 24;
6317 else if (rel->r_offset != offset + 16)
6318 goto broken_opd;
6319 else if (rel + 1 < relend
6320 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6321 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6322 {
6323 offset += 16;
6324 cnt_16b++;
6325 }
6326 else if (rel + 2 < relend
6327 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6328 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6329 {
6330 offset += 24;
6331 rel += 1;
6332 }
6333 else
6334 goto broken_opd;
6335 }
6336
6337 add_aux_fields = non_overlapping && cnt_16b > 0;
6338
6339 if (need_edit || add_aux_fields)
6340 {
6341 Elf_Internal_Rela *write_rel;
6342 bfd_byte *rptr, *wptr;
6343 bfd_byte *new_contents = NULL;
6344 bfd_boolean skip;
6345 long opd_ent_size;
6346
6347 /* This seems a waste of time as input .opd sections are all
6348 zeros as generated by gcc, but I suppose there's no reason
6349 this will always be so. We might start putting something in
6350 the third word of .opd entries. */
6351 if ((sec->flags & SEC_IN_MEMORY) == 0)
6352 {
6353 bfd_byte *loc;
6354 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6355 {
6356 if (loc != NULL)
6357 free (loc);
6358 error_ret:
6359 if (local_syms != NULL
6360 && symtab_hdr->contents != (unsigned char *) local_syms)
6361 free (local_syms);
6362 if (elf_section_data (sec)->relocs != relstart)
6363 free (relstart);
6364 return FALSE;
6365 }
6366 sec->contents = loc;
6367 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6368 }
6369
6370 elf_section_data (sec)->relocs = relstart;
6371
6372 new_contents = sec->contents;
6373 if (add_aux_fields)
6374 {
6375 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6376 if (new_contents == NULL)
6377 return FALSE;
6378 need_pad = FALSE;
6379 }
6380 wptr = new_contents;
6381 rptr = sec->contents;
6382
6383 write_rel = relstart;
6384 skip = FALSE;
6385 offset = 0;
6386 opd_ent_size = 0;
6387 for (rel = relstart; rel < relend; rel++)
6388 {
6389 unsigned long r_symndx;
6390 asection *sym_sec;
6391 struct elf_link_hash_entry *h;
6392 Elf_Internal_Sym *sym;
6393
6394 r_symndx = ELF64_R_SYM (rel->r_info);
6395 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6396 r_symndx, ibfd))
6397 goto error_ret;
6398
6399 if (rel->r_offset == offset)
6400 {
6401 struct ppc_link_hash_entry *fdh = NULL;
6402
6403 /* See if the .opd entry is full 24 byte or
6404 16 byte (with fd_aux entry overlapped with next
6405 fd_func). */
6406 opd_ent_size = 24;
6407 if ((rel + 2 == relend && sec->size == offset + 16)
6408 || (rel + 3 < relend
6409 && rel[2].r_offset == offset + 16
6410 && rel[3].r_offset == offset + 24
6411 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6412 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6413 opd_ent_size = 16;
6414
6415 if (h != NULL
6416 && h->root.root.string[0] == '.')
6417 {
6418 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6419 ppc_hash_table (info));
6420 if (fdh != NULL
6421 && fdh->elf.root.type != bfd_link_hash_defined
6422 && fdh->elf.root.type != bfd_link_hash_defweak)
6423 fdh = NULL;
6424 }
6425
6426 skip = (sym_sec->owner != ibfd
6427 || sym_sec->output_section == bfd_abs_section_ptr);
6428 if (skip)
6429 {
6430 if (fdh != NULL && sym_sec->owner == ibfd)
6431 {
6432 /* Arrange for the function descriptor sym
6433 to be dropped. */
6434 fdh->elf.root.u.def.value = 0;
6435 fdh->elf.root.u.def.section = sym_sec;
6436 }
6437 opd_adjust[rel->r_offset / 8] = -1;
6438 }
6439 else
6440 {
6441 /* We'll be keeping this opd entry. */
6442
6443 if (fdh != NULL)
6444 {
6445 /* Redefine the function descriptor symbol to
6446 this location in the opd section. It is
6447 necessary to update the value here rather
6448 than using an array of adjustments as we do
6449 for local symbols, because various places
6450 in the generic ELF code use the value
6451 stored in u.def.value. */
6452 fdh->elf.root.u.def.value = wptr - new_contents;
6453 fdh->adjust_done = 1;
6454 }
6455
6456 /* Local syms are a bit tricky. We could
6457 tweak them as they can be cached, but
6458 we'd need to look through the local syms
6459 for the function descriptor sym which we
6460 don't have at the moment. So keep an
6461 array of adjustments. */
6462 opd_adjust[rel->r_offset / 8]
6463 = (wptr - new_contents) - (rptr - sec->contents);
6464
6465 if (wptr != rptr)
6466 memcpy (wptr, rptr, opd_ent_size);
6467 wptr += opd_ent_size;
6468 if (add_aux_fields && opd_ent_size == 16)
6469 {
6470 memset (wptr, '\0', 8);
6471 wptr += 8;
6472 }
6473 }
6474 rptr += opd_ent_size;
6475 offset += opd_ent_size;
6476 }
6477
6478 if (skip)
6479 {
6480 if (!dec_dynrel_count (rel->r_info, sec, info,
6481 NULL, h, sym_sec))
6482 goto error_ret;
6483 }
6484 else
6485 {
6486 /* We need to adjust any reloc offsets to point to the
6487 new opd entries. While we're at it, we may as well
6488 remove redundant relocs. */
6489 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6490 if (write_rel != rel)
6491 memcpy (write_rel, rel, sizeof (*rel));
6492 ++write_rel;
6493 }
6494 }
6495
6496 sec->size = wptr - new_contents;
6497 sec->reloc_count = write_rel - relstart;
6498 if (add_aux_fields)
6499 {
6500 free (sec->contents);
6501 sec->contents = new_contents;
6502 }
6503
6504 /* Fudge the size too, as this is used later in
6505 elf_bfd_final_link if we are emitting relocs. */
6506 elf_section_data (sec)->rel_hdr.sh_size
6507 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6508 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6509 some_edited = TRUE;
6510 }
6511 else if (elf_section_data (sec)->relocs != relstart)
6512 free (relstart);
6513
6514 if (local_syms != NULL
6515 && symtab_hdr->contents != (unsigned char *) local_syms)
6516 {
6517 if (!info->keep_memory)
6518 free (local_syms);
6519 else
6520 symtab_hdr->contents = (unsigned char *) local_syms;
6521 }
6522 }
6523
6524 if (some_edited)
6525 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6526
6527 /* If we are doing a final link and the last .opd entry is just 16 byte
6528 long, add a 8 byte padding after it. */
6529 if (need_pad != NULL && !info->relocatable)
6530 {
6531 bfd_byte *p;
6532
6533 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6534 {
6535 BFD_ASSERT (need_pad->size > 0);
6536
6537 p = bfd_malloc (need_pad->size + 8);
6538 if (p == NULL)
6539 return FALSE;
6540
6541 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6542 p, 0, need_pad->size))
6543 return FALSE;
6544
6545 need_pad->contents = p;
6546 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6547 }
6548 else
6549 {
6550 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6551 if (p == NULL)
6552 return FALSE;
6553
6554 need_pad->contents = p;
6555 }
6556
6557 memset (need_pad->contents + need_pad->size, 0, 8);
6558 need_pad->size += 8;
6559 }
6560
6561 return TRUE;
6562 }
6563
6564 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6565
6566 asection *
6567 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6568 {
6569 struct ppc_link_hash_table *htab;
6570
6571 htab = ppc_hash_table (info);
6572 if (htab->tls_get_addr != NULL)
6573 {
6574 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6575
6576 while (h->elf.root.type == bfd_link_hash_indirect
6577 || h->elf.root.type == bfd_link_hash_warning)
6578 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6579
6580 htab->tls_get_addr = h;
6581
6582 if (htab->tls_get_addr_fd == NULL
6583 && h->oh != NULL
6584 && h->oh->is_func_descriptor
6585 && (h->oh->elf.root.type == bfd_link_hash_defined
6586 || h->oh->elf.root.type == bfd_link_hash_defweak))
6587 htab->tls_get_addr_fd = h->oh;
6588 }
6589
6590 if (htab->tls_get_addr_fd != NULL)
6591 {
6592 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6593
6594 while (h->elf.root.type == bfd_link_hash_indirect
6595 || h->elf.root.type == bfd_link_hash_warning)
6596 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6597
6598 htab->tls_get_addr_fd = h;
6599 }
6600
6601 return _bfd_elf_tls_setup (obfd, info);
6602 }
6603
6604 /* Run through all the TLS relocs looking for optimization
6605 opportunities. The linker has been hacked (see ppc64elf.em) to do
6606 a preliminary section layout so that we know the TLS segment
6607 offsets. We can't optimize earlier because some optimizations need
6608 to know the tp offset, and we need to optimize before allocating
6609 dynamic relocations. */
6610
6611 bfd_boolean
6612 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6613 {
6614 bfd *ibfd;
6615 asection *sec;
6616 struct ppc_link_hash_table *htab;
6617
6618 if (info->relocatable || info->shared)
6619 return TRUE;
6620
6621 htab = ppc_hash_table (info);
6622 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6623 {
6624 Elf_Internal_Sym *locsyms = NULL;
6625
6626 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6627 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6628 {
6629 Elf_Internal_Rela *relstart, *rel, *relend;
6630 int expecting_tls_get_addr;
6631
6632 /* Read the relocations. */
6633 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6634 info->keep_memory);
6635 if (relstart == NULL)
6636 return FALSE;
6637
6638 expecting_tls_get_addr = 0;
6639 relend = relstart + sec->reloc_count;
6640 for (rel = relstart; rel < relend; rel++)
6641 {
6642 enum elf_ppc64_reloc_type r_type;
6643 unsigned long r_symndx;
6644 struct elf_link_hash_entry *h;
6645 Elf_Internal_Sym *sym;
6646 asection *sym_sec;
6647 char *tls_mask;
6648 char tls_set, tls_clear, tls_type = 0;
6649 bfd_vma value;
6650 bfd_boolean ok_tprel, is_local;
6651
6652 r_symndx = ELF64_R_SYM (rel->r_info);
6653 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6654 r_symndx, ibfd))
6655 {
6656 err_free_rel:
6657 if (elf_section_data (sec)->relocs != relstart)
6658 free (relstart);
6659 if (locsyms != NULL
6660 && (elf_tdata (ibfd)->symtab_hdr.contents
6661 != (unsigned char *) locsyms))
6662 free (locsyms);
6663 return FALSE;
6664 }
6665
6666 if (h != NULL)
6667 {
6668 if (h->root.type != bfd_link_hash_defined
6669 && h->root.type != bfd_link_hash_defweak)
6670 continue;
6671 value = h->root.u.def.value;
6672 }
6673 else
6674 /* Symbols referenced by TLS relocs must be of type
6675 STT_TLS. So no need for .opd local sym adjust. */
6676 value = sym->st_value;
6677
6678 ok_tprel = FALSE;
6679 is_local = FALSE;
6680 if (h == NULL
6681 || !h->def_dynamic)
6682 {
6683 is_local = TRUE;
6684 value += sym_sec->output_offset;
6685 value += sym_sec->output_section->vma;
6686 value -= htab->elf.tls_sec->vma;
6687 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6688 < (bfd_vma) 1 << 32);
6689 }
6690
6691 r_type = ELF64_R_TYPE (rel->r_info);
6692 switch (r_type)
6693 {
6694 case R_PPC64_GOT_TLSLD16:
6695 case R_PPC64_GOT_TLSLD16_LO:
6696 case R_PPC64_GOT_TLSLD16_HI:
6697 case R_PPC64_GOT_TLSLD16_HA:
6698 /* These relocs should never be against a symbol
6699 defined in a shared lib. Leave them alone if
6700 that turns out to be the case. */
6701 ppc64_tlsld_got (ibfd)->refcount -= 1;
6702 if (!is_local)
6703 continue;
6704
6705 /* LD -> LE */
6706 tls_set = 0;
6707 tls_clear = TLS_LD;
6708 tls_type = TLS_TLS | TLS_LD;
6709 expecting_tls_get_addr = 1;
6710 break;
6711
6712 case R_PPC64_GOT_TLSGD16:
6713 case R_PPC64_GOT_TLSGD16_LO:
6714 case R_PPC64_GOT_TLSGD16_HI:
6715 case R_PPC64_GOT_TLSGD16_HA:
6716 if (ok_tprel)
6717 /* GD -> LE */
6718 tls_set = 0;
6719 else
6720 /* GD -> IE */
6721 tls_set = TLS_TLS | TLS_TPRELGD;
6722 tls_clear = TLS_GD;
6723 tls_type = TLS_TLS | TLS_GD;
6724 expecting_tls_get_addr = 1;
6725 break;
6726
6727 case R_PPC64_GOT_TPREL16_DS:
6728 case R_PPC64_GOT_TPREL16_LO_DS:
6729 case R_PPC64_GOT_TPREL16_HI:
6730 case R_PPC64_GOT_TPREL16_HA:
6731 expecting_tls_get_addr = 0;
6732 if (ok_tprel)
6733 {
6734 /* IE -> LE */
6735 tls_set = 0;
6736 tls_clear = TLS_TPREL;
6737 tls_type = TLS_TLS | TLS_TPREL;
6738 break;
6739 }
6740 else
6741 continue;
6742
6743 case R_PPC64_REL14:
6744 case R_PPC64_REL14_BRTAKEN:
6745 case R_PPC64_REL14_BRNTAKEN:
6746 case R_PPC64_REL24:
6747 if (h != NULL
6748 && (h == &htab->tls_get_addr->elf
6749 || h == &htab->tls_get_addr_fd->elf))
6750 {
6751 if (!expecting_tls_get_addr
6752 && rel != relstart
6753 && ((ELF64_R_TYPE (rel[-1].r_info)
6754 == R_PPC64_TOC16)
6755 || (ELF64_R_TYPE (rel[-1].r_info)
6756 == R_PPC64_TOC16_LO)))
6757 {
6758 /* Check for toc tls entries. */
6759 char *toc_tls;
6760 int retval;
6761
6762 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6763 rel - 1, ibfd);
6764 if (retval == 0)
6765 goto err_free_rel;
6766 if (toc_tls != NULL)
6767 expecting_tls_get_addr = retval > 1;
6768 }
6769
6770 if (expecting_tls_get_addr)
6771 {
6772 struct plt_entry *ent;
6773 for (ent = h->plt.plist; ent; ent = ent->next)
6774 if (ent->addend == 0)
6775 {
6776 if (ent->plt.refcount > 0)
6777 ent->plt.refcount -= 1;
6778 break;
6779 }
6780 }
6781 }
6782 expecting_tls_get_addr = 0;
6783 continue;
6784
6785 case R_PPC64_TPREL64:
6786 expecting_tls_get_addr = 0;
6787 if (ok_tprel)
6788 {
6789 /* IE -> LE */
6790 tls_set = TLS_EXPLICIT;
6791 tls_clear = TLS_TPREL;
6792 break;
6793 }
6794 else
6795 continue;
6796
6797 case R_PPC64_DTPMOD64:
6798 expecting_tls_get_addr = 0;
6799 if (rel + 1 < relend
6800 && (rel[1].r_info
6801 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6802 && rel[1].r_offset == rel->r_offset + 8)
6803 {
6804 if (ok_tprel)
6805 /* GD -> LE */
6806 tls_set = TLS_EXPLICIT | TLS_GD;
6807 else
6808 /* GD -> IE */
6809 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6810 tls_clear = TLS_GD;
6811 }
6812 else
6813 {
6814 if (!is_local)
6815 continue;
6816
6817 /* LD -> LE */
6818 tls_set = TLS_EXPLICIT;
6819 tls_clear = TLS_LD;
6820 }
6821 break;
6822
6823 default:
6824 expecting_tls_get_addr = 0;
6825 continue;
6826 }
6827
6828 if ((tls_set & TLS_EXPLICIT) == 0)
6829 {
6830 struct got_entry *ent;
6831
6832 /* Adjust got entry for this reloc. */
6833 if (h != NULL)
6834 ent = h->got.glist;
6835 else
6836 ent = elf_local_got_ents (ibfd)[r_symndx];
6837
6838 for (; ent != NULL; ent = ent->next)
6839 if (ent->addend == rel->r_addend
6840 && ent->owner == ibfd
6841 && ent->tls_type == tls_type)
6842 break;
6843 if (ent == NULL)
6844 abort ();
6845
6846 if (tls_set == 0)
6847 {
6848 /* We managed to get rid of a got entry. */
6849 if (ent->got.refcount > 0)
6850 ent->got.refcount -= 1;
6851 }
6852 }
6853 else
6854 {
6855 /* If we got rid of a DTPMOD/DTPREL reloc pair then
6856 we'll lose one or two dyn relocs. */
6857 if (!dec_dynrel_count (rel->r_info, sec, info,
6858 NULL, h, sym_sec))
6859 return FALSE;
6860
6861 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6862 {
6863 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
6864 NULL, h, sym_sec))
6865 return FALSE;
6866 }
6867 }
6868
6869 *tls_mask |= tls_set;
6870 *tls_mask &= ~tls_clear;
6871 }
6872
6873 if (elf_section_data (sec)->relocs != relstart)
6874 free (relstart);
6875 }
6876
6877 if (locsyms != NULL
6878 && (elf_tdata (ibfd)->symtab_hdr.contents
6879 != (unsigned char *) locsyms))
6880 {
6881 if (!info->keep_memory)
6882 free (locsyms);
6883 else
6884 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6885 }
6886 }
6887 return TRUE;
6888 }
6889
6890 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6891 the values of any global symbols in a toc section that has been
6892 edited. Globals in toc sections should be a rarity, so this function
6893 sets a flag if any are found in toc sections other than the one just
6894 edited, so that futher hash table traversals can be avoided. */
6895
6896 struct adjust_toc_info
6897 {
6898 asection *toc;
6899 unsigned long *skip;
6900 bfd_boolean global_toc_syms;
6901 };
6902
6903 static bfd_boolean
6904 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6905 {
6906 struct ppc_link_hash_entry *eh;
6907 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6908
6909 if (h->root.type == bfd_link_hash_indirect)
6910 return TRUE;
6911
6912 if (h->root.type == bfd_link_hash_warning)
6913 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6914
6915 if (h->root.type != bfd_link_hash_defined
6916 && h->root.type != bfd_link_hash_defweak)
6917 return TRUE;
6918
6919 eh = (struct ppc_link_hash_entry *) h;
6920 if (eh->adjust_done)
6921 return TRUE;
6922
6923 if (eh->elf.root.u.def.section == toc_inf->toc)
6924 {
6925 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6926 if (skip != (unsigned long) -1)
6927 eh->elf.root.u.def.value -= skip;
6928 else
6929 {
6930 (*_bfd_error_handler)
6931 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6932 eh->elf.root.u.def.section = &bfd_abs_section;
6933 eh->elf.root.u.def.value = 0;
6934 }
6935 eh->adjust_done = 1;
6936 }
6937 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6938 toc_inf->global_toc_syms = TRUE;
6939
6940 return TRUE;
6941 }
6942
6943 /* Examine all relocs referencing .toc sections in order to remove
6944 unused .toc entries. */
6945
6946 bfd_boolean
6947 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6948 {
6949 bfd *ibfd;
6950 struct adjust_toc_info toc_inf;
6951
6952 toc_inf.global_toc_syms = TRUE;
6953 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6954 {
6955 asection *toc, *sec;
6956 Elf_Internal_Shdr *symtab_hdr;
6957 Elf_Internal_Sym *local_syms;
6958 struct elf_link_hash_entry **sym_hashes;
6959 Elf_Internal_Rela *relstart, *rel;
6960 unsigned long *skip, *drop;
6961 unsigned char *used;
6962 unsigned char *keep, last, some_unused;
6963
6964 toc = bfd_get_section_by_name (ibfd, ".toc");
6965 if (toc == NULL
6966 || toc->size == 0
6967 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6968 || elf_discarded_section (toc))
6969 continue;
6970
6971 local_syms = NULL;
6972 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6973 sym_hashes = elf_sym_hashes (ibfd);
6974
6975 /* Look at sections dropped from the final link. */
6976 skip = NULL;
6977 relstart = NULL;
6978 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6979 {
6980 if (sec->reloc_count == 0
6981 || !elf_discarded_section (sec)
6982 || get_opd_info (sec)
6983 || (sec->flags & SEC_ALLOC) == 0
6984 || (sec->flags & SEC_DEBUGGING) != 0)
6985 continue;
6986
6987 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6988 if (relstart == NULL)
6989 goto error_ret;
6990
6991 /* Run through the relocs to see which toc entries might be
6992 unused. */
6993 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6994 {
6995 enum elf_ppc64_reloc_type r_type;
6996 unsigned long r_symndx;
6997 asection *sym_sec;
6998 struct elf_link_hash_entry *h;
6999 Elf_Internal_Sym *sym;
7000 bfd_vma val;
7001
7002 r_type = ELF64_R_TYPE (rel->r_info);
7003 switch (r_type)
7004 {
7005 default:
7006 continue;
7007
7008 case R_PPC64_TOC16:
7009 case R_PPC64_TOC16_LO:
7010 case R_PPC64_TOC16_HI:
7011 case R_PPC64_TOC16_HA:
7012 case R_PPC64_TOC16_DS:
7013 case R_PPC64_TOC16_LO_DS:
7014 break;
7015 }
7016
7017 r_symndx = ELF64_R_SYM (rel->r_info);
7018 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7019 r_symndx, ibfd))
7020 goto error_ret;
7021
7022 if (sym_sec != toc)
7023 continue;
7024
7025 if (h != NULL)
7026 val = h->root.u.def.value;
7027 else
7028 val = sym->st_value;
7029 val += rel->r_addend;
7030
7031 if (val >= toc->size)
7032 continue;
7033
7034 /* Anything in the toc ought to be aligned to 8 bytes.
7035 If not, don't mark as unused. */
7036 if (val & 7)
7037 continue;
7038
7039 if (skip == NULL)
7040 {
7041 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7042 if (skip == NULL)
7043 goto error_ret;
7044 }
7045
7046 skip[val >> 3] = 1;
7047 }
7048
7049 if (elf_section_data (sec)->relocs != relstart)
7050 free (relstart);
7051 }
7052
7053 if (skip == NULL)
7054 continue;
7055
7056 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7057 if (used == NULL)
7058 {
7059 error_ret:
7060 if (local_syms != NULL
7061 && symtab_hdr->contents != (unsigned char *) local_syms)
7062 free (local_syms);
7063 if (sec != NULL
7064 && relstart != NULL
7065 && elf_section_data (sec)->relocs != relstart)
7066 free (relstart);
7067 if (skip != NULL)
7068 free (skip);
7069 return FALSE;
7070 }
7071
7072 /* Now check all kept sections that might reference the toc. */
7073 for (sec = ibfd->sections;
7074 sec != NULL;
7075 /* Check the toc itself last. */
7076 sec = (sec == toc ? NULL
7077 : sec->next == toc && sec->next->next ? sec->next->next
7078 : sec->next == NULL ? toc
7079 : sec->next))
7080 {
7081 int repeat;
7082
7083 if (sec->reloc_count == 0
7084 || elf_discarded_section (sec)
7085 || get_opd_info (sec)
7086 || (sec->flags & SEC_ALLOC) == 0
7087 || (sec->flags & SEC_DEBUGGING) != 0)
7088 continue;
7089
7090 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7091 if (relstart == NULL)
7092 goto error_ret;
7093
7094 /* Mark toc entries referenced as used. */
7095 repeat = 0;
7096 do
7097 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7098 {
7099 enum elf_ppc64_reloc_type r_type;
7100 unsigned long r_symndx;
7101 asection *sym_sec;
7102 struct elf_link_hash_entry *h;
7103 Elf_Internal_Sym *sym;
7104 bfd_vma val;
7105
7106 r_type = ELF64_R_TYPE (rel->r_info);
7107 switch (r_type)
7108 {
7109 case R_PPC64_TOC16:
7110 case R_PPC64_TOC16_LO:
7111 case R_PPC64_TOC16_HI:
7112 case R_PPC64_TOC16_HA:
7113 case R_PPC64_TOC16_DS:
7114 case R_PPC64_TOC16_LO_DS:
7115 /* In case we're taking addresses of toc entries. */
7116 case R_PPC64_ADDR64:
7117 break;
7118
7119 default:
7120 continue;
7121 }
7122
7123 r_symndx = ELF64_R_SYM (rel->r_info);
7124 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7125 r_symndx, ibfd))
7126 {
7127 free (used);
7128 goto error_ret;
7129 }
7130
7131 if (sym_sec != toc)
7132 continue;
7133
7134 if (h != NULL)
7135 val = h->root.u.def.value;
7136 else
7137 val = sym->st_value;
7138 val += rel->r_addend;
7139
7140 if (val >= toc->size)
7141 continue;
7142
7143 /* For the toc section, we only mark as used if
7144 this entry itself isn't unused. */
7145 if (sec == toc
7146 && !used[val >> 3]
7147 && (used[rel->r_offset >> 3]
7148 || !skip[rel->r_offset >> 3]))
7149 /* Do all the relocs again, to catch reference
7150 chains. */
7151 repeat = 1;
7152
7153 used[val >> 3] = 1;
7154 }
7155 while (repeat);
7156 }
7157
7158 /* Merge the used and skip arrays. Assume that TOC
7159 doublewords not appearing as either used or unused belong
7160 to to an entry more than one doubleword in size. */
7161 for (drop = skip, keep = used, last = 0, some_unused = 0;
7162 drop < skip + (toc->size + 7) / 8;
7163 ++drop, ++keep)
7164 {
7165 if (*keep)
7166 {
7167 *drop = 0;
7168 last = 0;
7169 }
7170 else if (*drop)
7171 {
7172 some_unused = 1;
7173 last = 1;
7174 }
7175 else
7176 *drop = last;
7177 }
7178
7179 free (used);
7180
7181 if (some_unused)
7182 {
7183 bfd_byte *contents, *src;
7184 unsigned long off;
7185
7186 /* Shuffle the toc contents, and at the same time convert the
7187 skip array from booleans into offsets. */
7188 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7189 goto error_ret;
7190
7191 elf_section_data (toc)->this_hdr.contents = contents;
7192
7193 for (src = contents, off = 0, drop = skip;
7194 src < contents + toc->size;
7195 src += 8, ++drop)
7196 {
7197 if (*drop)
7198 {
7199 *drop = (unsigned long) -1;
7200 off += 8;
7201 }
7202 else if (off != 0)
7203 {
7204 *drop = off;
7205 memcpy (src - off, src, 8);
7206 }
7207 }
7208 toc->rawsize = toc->size;
7209 toc->size = src - contents - off;
7210
7211 if (toc->reloc_count != 0)
7212 {
7213 Elf_Internal_Rela *wrel;
7214 bfd_size_type sz;
7215
7216 /* Read toc relocs. */
7217 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7218 TRUE);
7219 if (relstart == NULL)
7220 goto error_ret;
7221
7222 /* Remove unused toc relocs, and adjust those we keep. */
7223 wrel = relstart;
7224 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7225 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7226 {
7227 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7228 wrel->r_info = rel->r_info;
7229 wrel->r_addend = rel->r_addend;
7230 ++wrel;
7231 }
7232 else if (!dec_dynrel_count (rel->r_info, toc, info,
7233 &local_syms, NULL, NULL))
7234 goto error_ret;
7235
7236 toc->reloc_count = wrel - relstart;
7237 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7238 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7239 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7240 }
7241
7242 /* Adjust addends for relocs against the toc section sym. */
7243 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7244 {
7245 if (sec->reloc_count == 0
7246 || elf_discarded_section (sec))
7247 continue;
7248
7249 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7250 TRUE);
7251 if (relstart == NULL)
7252 goto error_ret;
7253
7254 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7255 {
7256 enum elf_ppc64_reloc_type r_type;
7257 unsigned long r_symndx;
7258 asection *sym_sec;
7259 struct elf_link_hash_entry *h;
7260 Elf_Internal_Sym *sym;
7261
7262 r_type = ELF64_R_TYPE (rel->r_info);
7263 switch (r_type)
7264 {
7265 default:
7266 continue;
7267
7268 case R_PPC64_TOC16:
7269 case R_PPC64_TOC16_LO:
7270 case R_PPC64_TOC16_HI:
7271 case R_PPC64_TOC16_HA:
7272 case R_PPC64_TOC16_DS:
7273 case R_PPC64_TOC16_LO_DS:
7274 case R_PPC64_ADDR64:
7275 break;
7276 }
7277
7278 r_symndx = ELF64_R_SYM (rel->r_info);
7279 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7280 r_symndx, ibfd))
7281 goto error_ret;
7282
7283 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7284 continue;
7285
7286 rel->r_addend -= skip[rel->r_addend >> 3];
7287 }
7288 }
7289
7290 /* We shouldn't have local or global symbols defined in the TOC,
7291 but handle them anyway. */
7292 if (local_syms != NULL)
7293 {
7294 Elf_Internal_Sym *sym;
7295
7296 for (sym = local_syms;
7297 sym < local_syms + symtab_hdr->sh_info;
7298 ++sym)
7299 if (sym->st_shndx != SHN_UNDEF
7300 && (sym->st_shndx < SHN_LORESERVE
7301 || sym->st_shndx > SHN_HIRESERVE)
7302 && sym->st_value != 0
7303 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7304 {
7305 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7306 sym->st_value -= skip[sym->st_value >> 3];
7307 else
7308 {
7309 (*_bfd_error_handler)
7310 (_("%s defined in removed toc entry"),
7311 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7312 NULL));
7313 sym->st_value = 0;
7314 sym->st_shndx = SHN_ABS;
7315 }
7316 symtab_hdr->contents = (unsigned char *) local_syms;
7317 }
7318 }
7319
7320 /* Finally, adjust any global syms defined in the toc. */
7321 if (toc_inf.global_toc_syms)
7322 {
7323 toc_inf.toc = toc;
7324 toc_inf.skip = skip;
7325 toc_inf.global_toc_syms = FALSE;
7326 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7327 &toc_inf);
7328 }
7329 }
7330
7331 if (local_syms != NULL
7332 && symtab_hdr->contents != (unsigned char *) local_syms)
7333 {
7334 if (!info->keep_memory)
7335 free (local_syms);
7336 else
7337 symtab_hdr->contents = (unsigned char *) local_syms;
7338 }
7339 free (skip);
7340 }
7341
7342 return TRUE;
7343 }
7344
7345 /* Allocate space in .plt, .got and associated reloc sections for
7346 dynamic relocs. */
7347
7348 static bfd_boolean
7349 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7350 {
7351 struct bfd_link_info *info;
7352 struct ppc_link_hash_table *htab;
7353 asection *s;
7354 struct ppc_link_hash_entry *eh;
7355 struct ppc_dyn_relocs *p;
7356 struct got_entry *gent;
7357
7358 if (h->root.type == bfd_link_hash_indirect)
7359 return TRUE;
7360
7361 if (h->root.type == bfd_link_hash_warning)
7362 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7363
7364 info = (struct bfd_link_info *) inf;
7365 htab = ppc_hash_table (info);
7366
7367 if (htab->elf.dynamic_sections_created
7368 && h->dynindx != -1
7369 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7370 {
7371 struct plt_entry *pent;
7372 bfd_boolean doneone = FALSE;
7373 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7374 if (pent->plt.refcount > 0)
7375 {
7376 /* If this is the first .plt entry, make room for the special
7377 first entry. */
7378 s = htab->plt;
7379 if (s->size == 0)
7380 s->size += PLT_INITIAL_ENTRY_SIZE;
7381
7382 pent->plt.offset = s->size;
7383
7384 /* Make room for this entry. */
7385 s->size += PLT_ENTRY_SIZE;
7386
7387 /* Make room for the .glink code. */
7388 s = htab->glink;
7389 if (s->size == 0)
7390 s->size += GLINK_CALL_STUB_SIZE;
7391 /* We need bigger stubs past index 32767. */
7392 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7393 s->size += 4;
7394 s->size += 2*4;
7395
7396 /* We also need to make an entry in the .rela.plt section. */
7397 s = htab->relplt;
7398 s->size += sizeof (Elf64_External_Rela);
7399 doneone = TRUE;
7400 }
7401 else
7402 pent->plt.offset = (bfd_vma) -1;
7403 if (!doneone)
7404 {
7405 h->plt.plist = NULL;
7406 h->needs_plt = 0;
7407 }
7408 }
7409 else
7410 {
7411 h->plt.plist = NULL;
7412 h->needs_plt = 0;
7413 }
7414
7415 eh = (struct ppc_link_hash_entry *) h;
7416 /* Run through the TLS GD got entries first if we're changing them
7417 to TPREL. */
7418 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7419 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7420 if (gent->got.refcount > 0
7421 && (gent->tls_type & TLS_GD) != 0)
7422 {
7423 /* This was a GD entry that has been converted to TPREL. If
7424 there happens to be a TPREL entry we can use that one. */
7425 struct got_entry *ent;
7426 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7427 if (ent->got.refcount > 0
7428 && (ent->tls_type & TLS_TPREL) != 0
7429 && ent->addend == gent->addend
7430 && ent->owner == gent->owner)
7431 {
7432 gent->got.refcount = 0;
7433 break;
7434 }
7435
7436 /* If not, then we'll be using our own TPREL entry. */
7437 if (gent->got.refcount != 0)
7438 gent->tls_type = TLS_TLS | TLS_TPREL;
7439 }
7440
7441 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7442 if (gent->got.refcount > 0)
7443 {
7444 bfd_boolean dyn;
7445
7446 /* Make sure this symbol is output as a dynamic symbol.
7447 Undefined weak syms won't yet be marked as dynamic,
7448 nor will all TLS symbols. */
7449 if (h->dynindx == -1
7450 && !h->forced_local)
7451 {
7452 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7453 return FALSE;
7454 }
7455
7456 if ((gent->tls_type & TLS_LD) != 0
7457 && !h->def_dynamic)
7458 {
7459 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7460 continue;
7461 }
7462
7463 s = ppc64_elf_tdata (gent->owner)->got;
7464 gent->got.offset = s->size;
7465 s->size
7466 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7467 dyn = htab->elf.dynamic_sections_created;
7468 if ((info->shared
7469 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7470 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7471 || h->root.type != bfd_link_hash_undefweak))
7472 ppc64_elf_tdata (gent->owner)->relgot->size
7473 += (gent->tls_type & eh->tls_mask & TLS_GD
7474 ? 2 * sizeof (Elf64_External_Rela)
7475 : sizeof (Elf64_External_Rela));
7476 }
7477 else
7478 gent->got.offset = (bfd_vma) -1;
7479
7480 if (eh->dyn_relocs == NULL)
7481 return TRUE;
7482
7483 /* In the shared -Bsymbolic case, discard space allocated for
7484 dynamic pc-relative relocs against symbols which turn out to be
7485 defined in regular objects. For the normal shared case, discard
7486 space for relocs that have become local due to symbol visibility
7487 changes. */
7488
7489 if (info->shared)
7490 {
7491 /* Relocs that use pc_count are those that appear on a call insn,
7492 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7493 generated via assembly. We want calls to protected symbols to
7494 resolve directly to the function rather than going via the plt.
7495 If people want function pointer comparisons to work as expected
7496 then they should avoid writing weird assembly. */
7497 if (SYMBOL_CALLS_LOCAL (info, h))
7498 {
7499 struct ppc_dyn_relocs **pp;
7500
7501 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7502 {
7503 p->count -= p->pc_count;
7504 p->pc_count = 0;
7505 if (p->count == 0)
7506 *pp = p->next;
7507 else
7508 pp = &p->next;
7509 }
7510 }
7511
7512 /* Also discard relocs on undefined weak syms with non-default
7513 visibility. */
7514 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7515 && h->root.type == bfd_link_hash_undefweak)
7516 eh->dyn_relocs = NULL;
7517 }
7518 else if (ELIMINATE_COPY_RELOCS)
7519 {
7520 /* For the non-shared case, discard space for relocs against
7521 symbols which turn out to need copy relocs or are not
7522 dynamic. */
7523
7524 if (!h->non_got_ref
7525 && h->def_dynamic
7526 && !h->def_regular)
7527 {
7528 /* Make sure this symbol is output as a dynamic symbol.
7529 Undefined weak syms won't yet be marked as dynamic. */
7530 if (h->dynindx == -1
7531 && !h->forced_local)
7532 {
7533 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7534 return FALSE;
7535 }
7536
7537 /* If that succeeded, we know we'll be keeping all the
7538 relocs. */
7539 if (h->dynindx != -1)
7540 goto keep;
7541 }
7542
7543 eh->dyn_relocs = NULL;
7544
7545 keep: ;
7546 }
7547
7548 /* Finally, allocate space. */
7549 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7550 {
7551 asection *sreloc = elf_section_data (p->sec)->sreloc;
7552 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7553 }
7554
7555 return TRUE;
7556 }
7557
7558 /* Find any dynamic relocs that apply to read-only sections. */
7559
7560 static bfd_boolean
7561 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7562 {
7563 struct ppc_link_hash_entry *eh;
7564 struct ppc_dyn_relocs *p;
7565
7566 if (h->root.type == bfd_link_hash_warning)
7567 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7568
7569 eh = (struct ppc_link_hash_entry *) h;
7570 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7571 {
7572 asection *s = p->sec->output_section;
7573
7574 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7575 {
7576 struct bfd_link_info *info = inf;
7577
7578 info->flags |= DF_TEXTREL;
7579
7580 /* Not an error, just cut short the traversal. */
7581 return FALSE;
7582 }
7583 }
7584 return TRUE;
7585 }
7586
7587 /* Set the sizes of the dynamic sections. */
7588
7589 static bfd_boolean
7590 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7591 struct bfd_link_info *info)
7592 {
7593 struct ppc_link_hash_table *htab;
7594 bfd *dynobj;
7595 asection *s;
7596 bfd_boolean relocs;
7597 bfd *ibfd;
7598
7599 htab = ppc_hash_table (info);
7600 dynobj = htab->elf.dynobj;
7601 if (dynobj == NULL)
7602 abort ();
7603
7604 if (htab->elf.dynamic_sections_created)
7605 {
7606 /* Set the contents of the .interp section to the interpreter. */
7607 if (info->executable)
7608 {
7609 s = bfd_get_section_by_name (dynobj, ".interp");
7610 if (s == NULL)
7611 abort ();
7612 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7613 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7614 }
7615 }
7616
7617 /* Set up .got offsets for local syms, and space for local dynamic
7618 relocs. */
7619 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7620 {
7621 struct got_entry **lgot_ents;
7622 struct got_entry **end_lgot_ents;
7623 char *lgot_masks;
7624 bfd_size_type locsymcount;
7625 Elf_Internal_Shdr *symtab_hdr;
7626 asection *srel;
7627
7628 if (!is_ppc64_elf_target (ibfd->xvec))
7629 continue;
7630
7631 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7632 {
7633 s = ppc64_elf_tdata (ibfd)->got;
7634 ppc64_tlsld_got (ibfd)->offset = s->size;
7635 s->size += 16;
7636 if (info->shared)
7637 {
7638 srel = ppc64_elf_tdata (ibfd)->relgot;
7639 srel->size += sizeof (Elf64_External_Rela);
7640 }
7641 }
7642 else
7643 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7644
7645 for (s = ibfd->sections; s != NULL; s = s->next)
7646 {
7647 struct ppc_dyn_relocs *p;
7648
7649 for (p = *((struct ppc_dyn_relocs **)
7650 &elf_section_data (s)->local_dynrel);
7651 p != NULL;
7652 p = p->next)
7653 {
7654 if (!bfd_is_abs_section (p->sec)
7655 && bfd_is_abs_section (p->sec->output_section))
7656 {
7657 /* Input section has been discarded, either because
7658 it is a copy of a linkonce section or due to
7659 linker script /DISCARD/, so we'll be discarding
7660 the relocs too. */
7661 }
7662 else if (p->count != 0)
7663 {
7664 srel = elf_section_data (p->sec)->sreloc;
7665 srel->size += p->count * sizeof (Elf64_External_Rela);
7666 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7667 info->flags |= DF_TEXTREL;
7668 }
7669 }
7670 }
7671
7672 lgot_ents = elf_local_got_ents (ibfd);
7673 if (!lgot_ents)
7674 continue;
7675
7676 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7677 locsymcount = symtab_hdr->sh_info;
7678 end_lgot_ents = lgot_ents + locsymcount;
7679 lgot_masks = (char *) end_lgot_ents;
7680 s = ppc64_elf_tdata (ibfd)->got;
7681 srel = ppc64_elf_tdata (ibfd)->relgot;
7682 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7683 {
7684 struct got_entry *ent;
7685
7686 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7687 if (ent->got.refcount > 0)
7688 {
7689 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7690 {
7691 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7692 {
7693 ppc64_tlsld_got (ibfd)->offset = s->size;
7694 s->size += 16;
7695 if (info->shared)
7696 srel->size += sizeof (Elf64_External_Rela);
7697 }
7698 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7699 }
7700 else
7701 {
7702 ent->got.offset = s->size;
7703 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7704 {
7705 s->size += 16;
7706 if (info->shared)
7707 srel->size += 2 * sizeof (Elf64_External_Rela);
7708 }
7709 else
7710 {
7711 s->size += 8;
7712 if (info->shared)
7713 srel->size += sizeof (Elf64_External_Rela);
7714 }
7715 }
7716 }
7717 else
7718 ent->got.offset = (bfd_vma) -1;
7719 }
7720 }
7721
7722 /* Allocate global sym .plt and .got entries, and space for global
7723 sym dynamic relocs. */
7724 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7725
7726 /* We now have determined the sizes of the various dynamic sections.
7727 Allocate memory for them. */
7728 relocs = FALSE;
7729 for (s = dynobj->sections; s != NULL; s = s->next)
7730 {
7731 if ((s->flags & SEC_LINKER_CREATED) == 0)
7732 continue;
7733
7734 if (s == htab->brlt || s == htab->relbrlt)
7735 /* These haven't been allocated yet; don't strip. */
7736 continue;
7737 else if (s == htab->got
7738 || s == htab->plt
7739 || s == htab->glink)
7740 {
7741 /* Strip this section if we don't need it; see the
7742 comment below. */
7743 }
7744 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7745 {
7746 if (s->size == 0)
7747 {
7748 /* If we don't need this section, strip it from the
7749 output file. This is mostly to handle .rela.bss and
7750 .rela.plt. We must create both sections in
7751 create_dynamic_sections, because they must be created
7752 before the linker maps input sections to output
7753 sections. The linker does that before
7754 adjust_dynamic_symbol is called, and it is that
7755 function which decides whether anything needs to go
7756 into these sections. */
7757 }
7758 else
7759 {
7760 if (s != htab->relplt)
7761 relocs = TRUE;
7762
7763 /* We use the reloc_count field as a counter if we need
7764 to copy relocs into the output file. */
7765 s->reloc_count = 0;
7766 }
7767 }
7768 else
7769 {
7770 /* It's not one of our sections, so don't allocate space. */
7771 continue;
7772 }
7773
7774 if (s->size == 0)
7775 {
7776 s->flags |= SEC_EXCLUDE;
7777 continue;
7778 }
7779
7780 /* .plt is in the bss section. We don't initialise it. */
7781 if (s == htab->plt)
7782 continue;
7783
7784 /* Allocate memory for the section contents. We use bfd_zalloc
7785 here in case unused entries are not reclaimed before the
7786 section's contents are written out. This should not happen,
7787 but this way if it does we get a R_PPC64_NONE reloc in .rela
7788 sections instead of garbage.
7789 We also rely on the section contents being zero when writing
7790 the GOT. */
7791 s->contents = bfd_zalloc (dynobj, s->size);
7792 if (s->contents == NULL)
7793 return FALSE;
7794 }
7795
7796 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7797 {
7798 if (!is_ppc64_elf_target (ibfd->xvec))
7799 continue;
7800
7801 s = ppc64_elf_tdata (ibfd)->got;
7802 if (s != NULL && s != htab->got)
7803 {
7804 if (s->size == 0)
7805 s->flags |= SEC_EXCLUDE;
7806 else
7807 {
7808 s->contents = bfd_zalloc (ibfd, s->size);
7809 if (s->contents == NULL)
7810 return FALSE;
7811 }
7812 }
7813 s = ppc64_elf_tdata (ibfd)->relgot;
7814 if (s != NULL)
7815 {
7816 if (s->size == 0)
7817 s->flags |= SEC_EXCLUDE;
7818 else
7819 {
7820 s->contents = bfd_zalloc (ibfd, s->size);
7821 if (s->contents == NULL)
7822 return FALSE;
7823 relocs = TRUE;
7824 s->reloc_count = 0;
7825 }
7826 }
7827 }
7828
7829 if (htab->elf.dynamic_sections_created)
7830 {
7831 /* Add some entries to the .dynamic section. We fill in the
7832 values later, in ppc64_elf_finish_dynamic_sections, but we
7833 must add the entries now so that we get the correct size for
7834 the .dynamic section. The DT_DEBUG entry is filled in by the
7835 dynamic linker and used by the debugger. */
7836 #define add_dynamic_entry(TAG, VAL) \
7837 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7838
7839 if (info->executable)
7840 {
7841 if (!add_dynamic_entry (DT_DEBUG, 0))
7842 return FALSE;
7843 }
7844
7845 if (htab->plt != NULL && htab->plt->size != 0)
7846 {
7847 if (!add_dynamic_entry (DT_PLTGOT, 0)
7848 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7849 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7850 || !add_dynamic_entry (DT_JMPREL, 0)
7851 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7852 return FALSE;
7853 }
7854
7855 if (NO_OPD_RELOCS)
7856 {
7857 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7858 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7859 return FALSE;
7860 }
7861
7862 if (relocs)
7863 {
7864 if (!add_dynamic_entry (DT_RELA, 0)
7865 || !add_dynamic_entry (DT_RELASZ, 0)
7866 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7867 return FALSE;
7868
7869 /* If any dynamic relocs apply to a read-only section,
7870 then we need a DT_TEXTREL entry. */
7871 if ((info->flags & DF_TEXTREL) == 0)
7872 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7873
7874 if ((info->flags & DF_TEXTREL) != 0)
7875 {
7876 if (!add_dynamic_entry (DT_TEXTREL, 0))
7877 return FALSE;
7878 }
7879 }
7880 }
7881 #undef add_dynamic_entry
7882
7883 return TRUE;
7884 }
7885
7886 /* Determine the type of stub needed, if any, for a call. */
7887
7888 static inline enum ppc_stub_type
7889 ppc_type_of_stub (asection *input_sec,
7890 const Elf_Internal_Rela *rel,
7891 struct ppc_link_hash_entry **hash,
7892 bfd_vma destination)
7893 {
7894 struct ppc_link_hash_entry *h = *hash;
7895 bfd_vma location;
7896 bfd_vma branch_offset;
7897 bfd_vma max_branch_offset;
7898 enum elf_ppc64_reloc_type r_type;
7899
7900 if (h != NULL)
7901 {
7902 if (h->oh != NULL
7903 && h->oh->is_func_descriptor)
7904 h = h->oh;
7905
7906 if (h->elf.dynindx != -1)
7907 {
7908 struct plt_entry *ent;
7909
7910 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7911 if (ent->addend == rel->r_addend
7912 && ent->plt.offset != (bfd_vma) -1)
7913 {
7914 *hash = h;
7915 return ppc_stub_plt_call;
7916 }
7917 }
7918
7919 if (!(h->elf.root.type == bfd_link_hash_defined
7920 || h->elf.root.type == bfd_link_hash_defweak)
7921 || h->elf.root.u.def.section->output_section == NULL)
7922 return ppc_stub_none;
7923 }
7924
7925 /* Determine where the call point is. */
7926 location = (input_sec->output_offset
7927 + input_sec->output_section->vma
7928 + rel->r_offset);
7929
7930 branch_offset = destination - location;
7931 r_type = ELF64_R_TYPE (rel->r_info);
7932
7933 /* Determine if a long branch stub is needed. */
7934 max_branch_offset = 1 << 25;
7935 if (r_type != R_PPC64_REL24)
7936 max_branch_offset = 1 << 15;
7937
7938 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7939 /* We need a stub. Figure out whether a long_branch or plt_branch
7940 is needed later. */
7941 return ppc_stub_long_branch;
7942
7943 return ppc_stub_none;
7944 }
7945
7946 /* Build a .plt call stub. */
7947
7948 static inline bfd_byte *
7949 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7950 {
7951 #define PPC_LO(v) ((v) & 0xffff)
7952 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7953 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7954
7955 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7956 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7957 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7958 if (PPC_HA (offset + 8) != PPC_HA (offset))
7959 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7960 offset += 8;
7961 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7962 if (PPC_HA (offset + 8) != PPC_HA (offset))
7963 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7964 offset += 8;
7965 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7966 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7967 bfd_put_32 (obfd, BCTR, p), p += 4;
7968 return p;
7969 }
7970
7971 static bfd_boolean
7972 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7973 {
7974 struct ppc_stub_hash_entry *stub_entry;
7975 struct ppc_branch_hash_entry *br_entry;
7976 struct bfd_link_info *info;
7977 struct ppc_link_hash_table *htab;
7978 bfd_byte *loc;
7979 bfd_byte *p;
7980 unsigned int indx;
7981 struct plt_entry *ent;
7982 bfd_vma dest, off;
7983 int size;
7984
7985 /* Massage our args to the form they really have. */
7986 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7987 info = in_arg;
7988
7989 htab = ppc_hash_table (info);
7990
7991 /* Make a note of the offset within the stubs for this entry. */
7992 stub_entry->stub_offset = stub_entry->stub_sec->size;
7993 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7994
7995 htab->stub_count[stub_entry->stub_type - 1] += 1;
7996 switch (stub_entry->stub_type)
7997 {
7998 case ppc_stub_long_branch:
7999 case ppc_stub_long_branch_r2off:
8000 /* Branches are relative. This is where we are going to. */
8001 off = dest = (stub_entry->target_value
8002 + stub_entry->target_section->output_offset
8003 + stub_entry->target_section->output_section->vma);
8004
8005 /* And this is where we are coming from. */
8006 off -= (stub_entry->stub_offset
8007 + stub_entry->stub_sec->output_offset
8008 + stub_entry->stub_sec->output_section->vma);
8009
8010 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8011 size = 4;
8012 else
8013 {
8014 bfd_vma r2off;
8015
8016 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8017 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8018 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8019 loc += 4;
8020 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8021 loc += 4;
8022 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8023 loc += 4;
8024 off -= 12;
8025 size = 16;
8026 }
8027 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8028
8029 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
8030
8031 if (info->emitrelocations)
8032 {
8033 Elf_Internal_Rela *relocs, *r;
8034 struct bfd_elf_section_data *elfsec_data;
8035
8036 elfsec_data = elf_section_data (stub_entry->stub_sec);
8037 relocs = elfsec_data->relocs;
8038 if (relocs == NULL)
8039 {
8040 bfd_size_type relsize;
8041 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8042 relocs = bfd_alloc (htab->stub_bfd, relsize);
8043 if (relocs == NULL)
8044 return FALSE;
8045 elfsec_data->relocs = relocs;
8046 elfsec_data->rel_hdr.sh_size = relsize;
8047 elfsec_data->rel_hdr.sh_entsize = 24;
8048 stub_entry->stub_sec->reloc_count = 0;
8049 }
8050 r = relocs + stub_entry->stub_sec->reloc_count;
8051 stub_entry->stub_sec->reloc_count += 1;
8052 r->r_offset = loc - stub_entry->stub_sec->contents;
8053 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8054 r->r_addend = dest;
8055 if (stub_entry->h != NULL)
8056 {
8057 struct elf_link_hash_entry **hashes;
8058 unsigned long symndx;
8059 struct ppc_link_hash_entry *h;
8060
8061 hashes = elf_sym_hashes (htab->stub_bfd);
8062 if (hashes == NULL)
8063 {
8064 bfd_size_type hsize;
8065
8066 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8067 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8068 if (hashes == NULL)
8069 return FALSE;
8070 elf_sym_hashes (htab->stub_bfd) = hashes;
8071 htab->stub_globals = 1;
8072 }
8073 symndx = htab->stub_globals++;
8074 h = stub_entry->h;
8075 hashes[symndx] = &h->elf;
8076 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8077 if (h->oh != NULL && h->oh->is_func)
8078 h = h->oh;
8079 if (h->elf.root.u.def.section != stub_entry->target_section)
8080 /* H is an opd symbol. The addend must be zero. */
8081 r->r_addend = 0;
8082 else
8083 {
8084 off = (h->elf.root.u.def.value
8085 + h->elf.root.u.def.section->output_offset
8086 + h->elf.root.u.def.section->output_section->vma);
8087 r->r_addend -= off;
8088 }
8089 }
8090 }
8091 break;
8092
8093 case ppc_stub_plt_branch:
8094 case ppc_stub_plt_branch_r2off:
8095 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8096 stub_entry->root.string + 9,
8097 FALSE, FALSE);
8098 if (br_entry == NULL)
8099 {
8100 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8101 stub_entry->root.string + 9);
8102 htab->stub_error = TRUE;
8103 return FALSE;
8104 }
8105
8106 off = (stub_entry->target_value
8107 + stub_entry->target_section->output_offset
8108 + stub_entry->target_section->output_section->vma);
8109
8110 bfd_put_64 (htab->brlt->owner, off,
8111 htab->brlt->contents + br_entry->offset);
8112
8113 if (htab->relbrlt != NULL)
8114 {
8115 /* Create a reloc for the branch lookup table entry. */
8116 Elf_Internal_Rela rela;
8117 bfd_byte *rl;
8118
8119 rela.r_offset = (br_entry->offset
8120 + htab->brlt->output_offset
8121 + htab->brlt->output_section->vma);
8122 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8123 rela.r_addend = off;
8124
8125 rl = htab->relbrlt->contents;
8126 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8127 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8128 }
8129
8130 off = (br_entry->offset
8131 + htab->brlt->output_offset
8132 + htab->brlt->output_section->vma
8133 - elf_gp (htab->brlt->output_section->owner)
8134 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8135
8136 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8137 {
8138 (*_bfd_error_handler)
8139 (_("linkage table error against `%s'"),
8140 stub_entry->root.string);
8141 bfd_set_error (bfd_error_bad_value);
8142 htab->stub_error = TRUE;
8143 return FALSE;
8144 }
8145
8146 indx = off;
8147 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8148 {
8149 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8150 loc += 4;
8151 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8152 size = 16;
8153 }
8154 else
8155 {
8156 bfd_vma r2off;
8157
8158 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8159 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8160 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8161 loc += 4;
8162 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8163 loc += 4;
8164 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8165 loc += 4;
8166 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8167 loc += 4;
8168 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8169 size = 28;
8170 }
8171 loc += 4;
8172 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8173 loc += 4;
8174 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8175 break;
8176
8177 case ppc_stub_plt_call:
8178 /* Do the best we can for shared libraries built without
8179 exporting ".foo" for each "foo". This can happen when symbol
8180 versioning scripts strip all bar a subset of symbols. */
8181 if (stub_entry->h->oh != NULL
8182 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8183 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8184 {
8185 /* Point the symbol at the stub. There may be multiple stubs,
8186 we don't really care; The main thing is to make this sym
8187 defined somewhere. Maybe defining the symbol in the stub
8188 section is a silly idea. If we didn't do this, htab->top_id
8189 could disappear. */
8190 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8191 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8192 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8193 }
8194
8195 /* Now build the stub. */
8196 off = (bfd_vma) -1;
8197 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8198 if (ent->addend == stub_entry->addend)
8199 {
8200 off = ent->plt.offset;
8201 break;
8202 }
8203 if (off >= (bfd_vma) -2)
8204 abort ();
8205
8206 off &= ~ (bfd_vma) 1;
8207 off += (htab->plt->output_offset
8208 + htab->plt->output_section->vma
8209 - elf_gp (htab->plt->output_section->owner)
8210 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8211
8212 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8213 {
8214 (*_bfd_error_handler)
8215 (_("linkage table error against `%s'"),
8216 stub_entry->h->elf.root.root.string);
8217 bfd_set_error (bfd_error_bad_value);
8218 htab->stub_error = TRUE;
8219 return FALSE;
8220 }
8221
8222 p = build_plt_stub (htab->stub_bfd, loc, off);
8223 size = p - loc;
8224 break;
8225
8226 default:
8227 BFD_FAIL ();
8228 return FALSE;
8229 }
8230
8231 stub_entry->stub_sec->size += size;
8232
8233 if (htab->emit_stub_syms)
8234 {
8235 struct elf_link_hash_entry *h;
8236 size_t len1, len2;
8237 char *name;
8238 const char *const stub_str[] = { "long_branch",
8239 "long_branch_r2off",
8240 "plt_branch",
8241 "plt_branch_r2off",
8242 "plt_call" };
8243
8244 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8245 len2 = strlen (stub_entry->root.string);
8246 name = bfd_malloc (len1 + len2 + 2);
8247 if (name == NULL)
8248 return FALSE;
8249 memcpy (name, stub_entry->root.string, 9);
8250 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8251 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8252 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8253 if (h == NULL)
8254 return FALSE;
8255 if (h->root.type == bfd_link_hash_new)
8256 {
8257 h->root.type = bfd_link_hash_defined;
8258 h->root.u.def.section = stub_entry->stub_sec;
8259 h->root.u.def.value = stub_entry->stub_offset;
8260 h->ref_regular = 1;
8261 h->def_regular = 1;
8262 h->ref_regular_nonweak = 1;
8263 h->forced_local = 1;
8264 h->non_elf = 0;
8265 }
8266 }
8267
8268 return TRUE;
8269 }
8270
8271 /* As above, but don't actually build the stub. Just bump offset so
8272 we know stub section sizes, and select plt_branch stubs where
8273 long_branch stubs won't do. */
8274
8275 static bfd_boolean
8276 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8277 {
8278 struct ppc_stub_hash_entry *stub_entry;
8279 struct bfd_link_info *info;
8280 struct ppc_link_hash_table *htab;
8281 bfd_vma off;
8282 int size;
8283
8284 /* Massage our args to the form they really have. */
8285 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8286 info = in_arg;
8287
8288 htab = ppc_hash_table (info);
8289
8290 if (stub_entry->stub_type == ppc_stub_plt_call)
8291 {
8292 struct plt_entry *ent;
8293 off = (bfd_vma) -1;
8294 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8295 if (ent->addend == stub_entry->addend)
8296 {
8297 off = ent->plt.offset & ~(bfd_vma) 1;
8298 break;
8299 }
8300 if (off >= (bfd_vma) -2)
8301 abort ();
8302 off += (htab->plt->output_offset
8303 + htab->plt->output_section->vma
8304 - elf_gp (htab->plt->output_section->owner)
8305 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8306
8307 size = PLT_CALL_STUB_SIZE;
8308 if (PPC_HA (off + 16) != PPC_HA (off))
8309 size += 4;
8310 }
8311 else
8312 {
8313 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8314 variants. */
8315 off = (stub_entry->target_value
8316 + stub_entry->target_section->output_offset
8317 + stub_entry->target_section->output_section->vma);
8318 off -= (stub_entry->stub_sec->size
8319 + stub_entry->stub_sec->output_offset
8320 + stub_entry->stub_sec->output_section->vma);
8321
8322 /* Reset the stub type from the plt variant in case we now
8323 can reach with a shorter stub. */
8324 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8325 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8326
8327 size = 4;
8328 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8329 {
8330 off -= 12;
8331 size = 16;
8332 }
8333
8334 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8335 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8336 {
8337 struct ppc_branch_hash_entry *br_entry;
8338
8339 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8340 stub_entry->root.string + 9,
8341 TRUE, FALSE);
8342 if (br_entry == NULL)
8343 {
8344 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8345 stub_entry->root.string + 9);
8346 htab->stub_error = TRUE;
8347 return FALSE;
8348 }
8349
8350 if (br_entry->iter != htab->stub_iteration)
8351 {
8352 br_entry->iter = htab->stub_iteration;
8353 br_entry->offset = htab->brlt->size;
8354 htab->brlt->size += 8;
8355
8356 if (htab->relbrlt != NULL)
8357 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8358 }
8359
8360 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8361 size = 16;
8362 if (stub_entry->stub_type != ppc_stub_plt_branch)
8363 size = 28;
8364 }
8365
8366 if (info->emitrelocations
8367 && (stub_entry->stub_type == ppc_stub_long_branch
8368 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8369 stub_entry->stub_sec->reloc_count += 1;
8370 }
8371
8372 stub_entry->stub_sec->size += size;
8373 return TRUE;
8374 }
8375
8376 /* Set up various things so that we can make a list of input sections
8377 for each output section included in the link. Returns -1 on error,
8378 0 when no stubs will be needed, and 1 on success. */
8379
8380 int
8381 ppc64_elf_setup_section_lists (bfd *output_bfd,
8382 struct bfd_link_info *info,
8383 int no_multi_toc)
8384 {
8385 bfd *input_bfd;
8386 int top_id, top_index, id;
8387 asection *section;
8388 asection **input_list;
8389 bfd_size_type amt;
8390 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8391
8392 htab->no_multi_toc = no_multi_toc;
8393
8394 if (htab->brlt == NULL)
8395 return 0;
8396
8397 /* Find the top input section id. */
8398 for (input_bfd = info->input_bfds, top_id = 3;
8399 input_bfd != NULL;
8400 input_bfd = input_bfd->link_next)
8401 {
8402 for (section = input_bfd->sections;
8403 section != NULL;
8404 section = section->next)
8405 {
8406 if (top_id < section->id)
8407 top_id = section->id;
8408 }
8409 }
8410
8411 htab->top_id = top_id;
8412 amt = sizeof (struct map_stub) * (top_id + 1);
8413 htab->stub_group = bfd_zmalloc (amt);
8414 if (htab->stub_group == NULL)
8415 return -1;
8416
8417 /* Set toc_off for com, und, abs and ind sections. */
8418 for (id = 0; id < 3; id++)
8419 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8420
8421 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8422
8423 /* We can't use output_bfd->section_count here to find the top output
8424 section index as some sections may have been removed, and
8425 strip_excluded_output_sections doesn't renumber the indices. */
8426 for (section = output_bfd->sections, top_index = 0;
8427 section != NULL;
8428 section = section->next)
8429 {
8430 if (top_index < section->index)
8431 top_index = section->index;
8432 }
8433
8434 htab->top_index = top_index;
8435 amt = sizeof (asection *) * (top_index + 1);
8436 input_list = bfd_zmalloc (amt);
8437 htab->input_list = input_list;
8438 if (input_list == NULL)
8439 return -1;
8440
8441 return 1;
8442 }
8443
8444 /* The linker repeatedly calls this function for each TOC input section
8445 and linker generated GOT section. Group input bfds such that the toc
8446 within a group is less than 64k in size. Will break with cute linker
8447 scripts that play games with dot in the output toc section. */
8448
8449 void
8450 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8451 {
8452 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8453
8454 if (!htab->no_multi_toc)
8455 {
8456 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8457 bfd_vma off = addr - htab->toc_curr;
8458
8459 if (off + isec->size > 0x10000)
8460 htab->toc_curr = addr;
8461
8462 elf_gp (isec->owner) = (htab->toc_curr
8463 - elf_gp (isec->output_section->owner)
8464 + TOC_BASE_OFF);
8465 }
8466 }
8467
8468 /* Called after the last call to the above function. */
8469
8470 void
8471 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8472 {
8473 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8474
8475 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8476
8477 /* toc_curr tracks the TOC offset used for code sections below in
8478 ppc64_elf_next_input_section. Start off at 0x8000. */
8479 htab->toc_curr = TOC_BASE_OFF;
8480 }
8481
8482 /* No toc references were found in ISEC. If the code in ISEC makes no
8483 calls, then there's no need to use toc adjusting stubs when branching
8484 into ISEC. Actually, indirect calls from ISEC are OK as they will
8485 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8486 needed, and 2 if a cyclical call-graph was found but no other reason
8487 for a stub was detected. If called from the top level, a return of
8488 2 means the same as a return of 0. */
8489
8490 static int
8491 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8492 {
8493 Elf_Internal_Rela *relstart, *rel;
8494 Elf_Internal_Sym *local_syms;
8495 int ret;
8496 struct ppc_link_hash_table *htab;
8497
8498 /* We know none of our code bearing sections will need toc stubs. */
8499 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8500 return 0;
8501
8502 if (isec->size == 0)
8503 return 0;
8504
8505 if (isec->output_section == NULL)
8506 return 0;
8507
8508 /* Hack for linux kernel. .fixup contains branches, but only back to
8509 the function that hit an exception. */
8510 if (strcmp (isec->name, ".fixup") == 0)
8511 return 0;
8512
8513 if (isec->reloc_count == 0)
8514 return 0;
8515
8516 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8517 info->keep_memory);
8518 if (relstart == NULL)
8519 return -1;
8520
8521 /* Look for branches to outside of this section. */
8522 local_syms = NULL;
8523 ret = 0;
8524 htab = ppc_hash_table (info);
8525 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8526 {
8527 enum elf_ppc64_reloc_type r_type;
8528 unsigned long r_symndx;
8529 struct elf_link_hash_entry *h;
8530 Elf_Internal_Sym *sym;
8531 asection *sym_sec;
8532 long *opd_adjust;
8533 bfd_vma sym_value;
8534 bfd_vma dest;
8535
8536 r_type = ELF64_R_TYPE (rel->r_info);
8537 if (r_type != R_PPC64_REL24
8538 && r_type != R_PPC64_REL14
8539 && r_type != R_PPC64_REL14_BRTAKEN
8540 && r_type != R_PPC64_REL14_BRNTAKEN)
8541 continue;
8542
8543 r_symndx = ELF64_R_SYM (rel->r_info);
8544 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8545 isec->owner))
8546 {
8547 ret = -1;
8548 break;
8549 }
8550
8551 /* Calls to dynamic lib functions go through a plt call stub
8552 that uses r2. Branches to undefined symbols might be a call
8553 using old-style dot symbols that can be satisfied by a plt
8554 call into a new-style dynamic library. */
8555 if (sym_sec == NULL)
8556 {
8557 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8558 if (eh != NULL
8559 && eh->oh != NULL
8560 && eh->oh->elf.plt.plist != NULL)
8561 {
8562 ret = 1;
8563 break;
8564 }
8565
8566 /* Ignore other undefined symbols. */
8567 continue;
8568 }
8569
8570 /* Assume branches to other sections not included in the link need
8571 stubs too, to cover -R and absolute syms. */
8572 if (sym_sec->output_section == NULL)
8573 {
8574 ret = 1;
8575 break;
8576 }
8577
8578 if (h == NULL)
8579 sym_value = sym->st_value;
8580 else
8581 {
8582 if (h->root.type != bfd_link_hash_defined
8583 && h->root.type != bfd_link_hash_defweak)
8584 abort ();
8585 sym_value = h->root.u.def.value;
8586 }
8587 sym_value += rel->r_addend;
8588
8589 /* If this branch reloc uses an opd sym, find the code section. */
8590 opd_adjust = get_opd_info (sym_sec);
8591 if (opd_adjust != NULL)
8592 {
8593 if (h == NULL)
8594 {
8595 long adjust;
8596
8597 adjust = opd_adjust[sym->st_value / 8];
8598 if (adjust == -1)
8599 /* Assume deleted functions won't ever be called. */
8600 continue;
8601 sym_value += adjust;
8602 }
8603
8604 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8605 if (dest == (bfd_vma) -1)
8606 continue;
8607 }
8608 else
8609 dest = (sym_value
8610 + sym_sec->output_offset
8611 + sym_sec->output_section->vma);
8612
8613 /* Ignore branch to self. */
8614 if (sym_sec == isec)
8615 continue;
8616
8617 /* If the called function uses the toc, we need a stub. */
8618 if (sym_sec->has_toc_reloc
8619 || sym_sec->makes_toc_func_call)
8620 {
8621 ret = 1;
8622 break;
8623 }
8624
8625 /* Assume any branch that needs a long branch stub might in fact
8626 need a plt_branch stub. A plt_branch stub uses r2. */
8627 else if (dest - (isec->output_offset
8628 + isec->output_section->vma
8629 + rel->r_offset) + (1 << 25) >= (2 << 25))
8630 {
8631 ret = 1;
8632 break;
8633 }
8634
8635 /* If calling back to a section in the process of being tested, we
8636 can't say for sure that no toc adjusting stubs are needed, so
8637 don't return zero. */
8638 else if (sym_sec->call_check_in_progress)
8639 ret = 2;
8640
8641 /* Branches to another section that itself doesn't have any TOC
8642 references are OK. Recursively call ourselves to check. */
8643 else if (sym_sec->id <= htab->top_id
8644 && htab->stub_group[sym_sec->id].toc_off == 0)
8645 {
8646 int recur;
8647
8648 /* Mark current section as indeterminate, so that other
8649 sections that call back to current won't be marked as
8650 known. */
8651 isec->call_check_in_progress = 1;
8652 recur = toc_adjusting_stub_needed (info, sym_sec);
8653 isec->call_check_in_progress = 0;
8654
8655 if (recur < 0)
8656 {
8657 /* An error. Exit. */
8658 ret = -1;
8659 break;
8660 }
8661 else if (recur <= 1)
8662 {
8663 /* Known result. Mark as checked and set section flag. */
8664 htab->stub_group[sym_sec->id].toc_off = 1;
8665 if (recur != 0)
8666 {
8667 sym_sec->makes_toc_func_call = 1;
8668 ret = 1;
8669 break;
8670 }
8671 }
8672 else
8673 {
8674 /* Unknown result. Continue checking. */
8675 ret = 2;
8676 }
8677 }
8678 }
8679
8680 if (local_syms != NULL
8681 && (elf_tdata (isec->owner)->symtab_hdr.contents
8682 != (unsigned char *) local_syms))
8683 free (local_syms);
8684 if (elf_section_data (isec)->relocs != relstart)
8685 free (relstart);
8686
8687 return ret;
8688 }
8689
8690 /* The linker repeatedly calls this function for each input section,
8691 in the order that input sections are linked into output sections.
8692 Build lists of input sections to determine groupings between which
8693 we may insert linker stubs. */
8694
8695 bfd_boolean
8696 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8697 {
8698 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8699
8700 if ((isec->output_section->flags & SEC_CODE) != 0
8701 && isec->output_section->index <= htab->top_index)
8702 {
8703 asection **list = htab->input_list + isec->output_section->index;
8704 /* Steal the link_sec pointer for our list. */
8705 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8706 /* This happens to make the list in reverse order,
8707 which is what we want. */
8708 PREV_SEC (isec) = *list;
8709 *list = isec;
8710 }
8711
8712 if (htab->multi_toc_needed)
8713 {
8714 /* If a code section has a function that uses the TOC then we need
8715 to use the right TOC (obviously). Also, make sure that .opd gets
8716 the correct TOC value for R_PPC64_TOC relocs that don't have or
8717 can't find their function symbol (shouldn't ever happen now). */
8718 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8719 {
8720 if (elf_gp (isec->owner) != 0)
8721 htab->toc_curr = elf_gp (isec->owner);
8722 }
8723 else if (htab->stub_group[isec->id].toc_off == 0)
8724 {
8725 int ret = toc_adjusting_stub_needed (info, isec);
8726 if (ret < 0)
8727 return FALSE;
8728 else
8729 isec->makes_toc_func_call = ret & 1;
8730 }
8731 }
8732
8733 /* Functions that don't use the TOC can belong in any TOC group.
8734 Use the last TOC base. This happens to make _init and _fini
8735 pasting work. */
8736 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8737 return TRUE;
8738 }
8739
8740 /* See whether we can group stub sections together. Grouping stub
8741 sections may result in fewer stubs. More importantly, we need to
8742 put all .init* and .fini* stubs at the beginning of the .init or
8743 .fini output sections respectively, because glibc splits the
8744 _init and _fini functions into multiple parts. Putting a stub in
8745 the middle of a function is not a good idea. */
8746
8747 static void
8748 group_sections (struct ppc_link_hash_table *htab,
8749 bfd_size_type stub_group_size,
8750 bfd_boolean stubs_always_before_branch)
8751 {
8752 asection **list = htab->input_list + htab->top_index;
8753 do
8754 {
8755 asection *tail = *list;
8756 while (tail != NULL)
8757 {
8758 asection *curr;
8759 asection *prev;
8760 bfd_size_type total;
8761 bfd_boolean big_sec;
8762 bfd_vma curr_toc;
8763
8764 curr = tail;
8765 total = tail->size;
8766 big_sec = total >= stub_group_size;
8767 curr_toc = htab->stub_group[tail->id].toc_off;
8768
8769 while ((prev = PREV_SEC (curr)) != NULL
8770 && ((total += curr->output_offset - prev->output_offset)
8771 < stub_group_size)
8772 && htab->stub_group[prev->id].toc_off == curr_toc)
8773 curr = prev;
8774
8775 /* OK, the size from the start of CURR to the end is less
8776 than stub_group_size and thus can be handled by one stub
8777 section. (or the tail section is itself larger than
8778 stub_group_size, in which case we may be toast.) We
8779 should really be keeping track of the total size of stubs
8780 added here, as stubs contribute to the final output
8781 section size. That's a little tricky, and this way will
8782 only break if stubs added make the total size more than
8783 2^25, ie. for the default stub_group_size, if stubs total
8784 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8785 do
8786 {
8787 prev = PREV_SEC (tail);
8788 /* Set up this stub group. */
8789 htab->stub_group[tail->id].link_sec = curr;
8790 }
8791 while (tail != curr && (tail = prev) != NULL);
8792
8793 /* But wait, there's more! Input sections up to stub_group_size
8794 bytes before the stub section can be handled by it too.
8795 Don't do this if we have a really large section after the
8796 stubs, as adding more stubs increases the chance that
8797 branches may not reach into the stub section. */
8798 if (!stubs_always_before_branch && !big_sec)
8799 {
8800 total = 0;
8801 while (prev != NULL
8802 && ((total += tail->output_offset - prev->output_offset)
8803 < stub_group_size)
8804 && htab->stub_group[prev->id].toc_off == curr_toc)
8805 {
8806 tail = prev;
8807 prev = PREV_SEC (tail);
8808 htab->stub_group[tail->id].link_sec = curr;
8809 }
8810 }
8811 tail = prev;
8812 }
8813 }
8814 while (list-- != htab->input_list);
8815 free (htab->input_list);
8816 #undef PREV_SEC
8817 }
8818
8819 /* Determine and set the size of the stub section for a final link.
8820
8821 The basic idea here is to examine all the relocations looking for
8822 PC-relative calls to a target that is unreachable with a "bl"
8823 instruction. */
8824
8825 bfd_boolean
8826 ppc64_elf_size_stubs (bfd *output_bfd,
8827 struct bfd_link_info *info,
8828 bfd_signed_vma group_size,
8829 asection *(*add_stub_section) (const char *, asection *),
8830 void (*layout_sections_again) (void))
8831 {
8832 bfd_size_type stub_group_size;
8833 bfd_boolean stubs_always_before_branch;
8834 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8835
8836 /* Stash our params away. */
8837 htab->add_stub_section = add_stub_section;
8838 htab->layout_sections_again = layout_sections_again;
8839 stubs_always_before_branch = group_size < 0;
8840 if (group_size < 0)
8841 stub_group_size = -group_size;
8842 else
8843 stub_group_size = group_size;
8844 if (stub_group_size == 1)
8845 {
8846 /* Default values. */
8847 if (stubs_always_before_branch)
8848 {
8849 stub_group_size = 0x1e00000;
8850 if (htab->has_14bit_branch)
8851 stub_group_size = 0x7800;
8852 }
8853 else
8854 {
8855 stub_group_size = 0x1c00000;
8856 if (htab->has_14bit_branch)
8857 stub_group_size = 0x7000;
8858 }
8859 }
8860
8861 group_sections (htab, stub_group_size, stubs_always_before_branch);
8862
8863 while (1)
8864 {
8865 bfd *input_bfd;
8866 unsigned int bfd_indx;
8867 asection *stub_sec;
8868 bfd_boolean stub_changed;
8869
8870 htab->stub_iteration += 1;
8871 stub_changed = FALSE;
8872
8873 for (input_bfd = info->input_bfds, bfd_indx = 0;
8874 input_bfd != NULL;
8875 input_bfd = input_bfd->link_next, bfd_indx++)
8876 {
8877 Elf_Internal_Shdr *symtab_hdr;
8878 asection *section;
8879 Elf_Internal_Sym *local_syms = NULL;
8880
8881 /* We'll need the symbol table in a second. */
8882 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8883 if (symtab_hdr->sh_info == 0)
8884 continue;
8885
8886 /* Walk over each section attached to the input bfd. */
8887 for (section = input_bfd->sections;
8888 section != NULL;
8889 section = section->next)
8890 {
8891 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8892
8893 /* If there aren't any relocs, then there's nothing more
8894 to do. */
8895 if ((section->flags & SEC_RELOC) == 0
8896 || section->reloc_count == 0)
8897 continue;
8898
8899 /* If this section is a link-once section that will be
8900 discarded, then don't create any stubs. */
8901 if (section->output_section == NULL
8902 || section->output_section->owner != output_bfd)
8903 continue;
8904
8905 /* Get the relocs. */
8906 internal_relocs
8907 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8908 info->keep_memory);
8909 if (internal_relocs == NULL)
8910 goto error_ret_free_local;
8911
8912 /* Now examine each relocation. */
8913 irela = internal_relocs;
8914 irelaend = irela + section->reloc_count;
8915 for (; irela < irelaend; irela++)
8916 {
8917 enum elf_ppc64_reloc_type r_type;
8918 unsigned int r_indx;
8919 enum ppc_stub_type stub_type;
8920 struct ppc_stub_hash_entry *stub_entry;
8921 asection *sym_sec, *code_sec;
8922 bfd_vma sym_value;
8923 bfd_vma destination;
8924 bfd_boolean ok_dest;
8925 struct ppc_link_hash_entry *hash;
8926 struct ppc_link_hash_entry *fdh;
8927 struct elf_link_hash_entry *h;
8928 Elf_Internal_Sym *sym;
8929 char *stub_name;
8930 const asection *id_sec;
8931 long *opd_adjust;
8932
8933 r_type = ELF64_R_TYPE (irela->r_info);
8934 r_indx = ELF64_R_SYM (irela->r_info);
8935
8936 if (r_type >= R_PPC64_max)
8937 {
8938 bfd_set_error (bfd_error_bad_value);
8939 goto error_ret_free_internal;
8940 }
8941
8942 /* Only look for stubs on branch instructions. */
8943 if (r_type != R_PPC64_REL24
8944 && r_type != R_PPC64_REL14
8945 && r_type != R_PPC64_REL14_BRTAKEN
8946 && r_type != R_PPC64_REL14_BRNTAKEN)
8947 continue;
8948
8949 /* Now determine the call target, its name, value,
8950 section. */
8951 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8952 r_indx, input_bfd))
8953 goto error_ret_free_internal;
8954 hash = (struct ppc_link_hash_entry *) h;
8955
8956 ok_dest = FALSE;
8957 fdh = NULL;
8958 if (hash == NULL)
8959 {
8960 sym_value = sym->st_value;
8961 ok_dest = TRUE;
8962 }
8963 else
8964 {
8965 sym_value = 0;
8966 /* Recognise an old ABI func code entry sym, and
8967 use the func descriptor sym instead. */
8968 if (hash->elf.root.root.string[0] == '.'
8969 && (fdh = get_fdh (hash, htab)) != NULL)
8970 {
8971 if (fdh->elf.root.type == bfd_link_hash_defined
8972 || fdh->elf.root.type == bfd_link_hash_defweak)
8973 {
8974 sym_sec = fdh->elf.root.u.def.section;
8975 sym_value = fdh->elf.root.u.def.value;
8976 if (sym_sec->output_section != NULL)
8977 ok_dest = TRUE;
8978 }
8979 else
8980 fdh = NULL;
8981 }
8982 else if (hash->elf.root.type == bfd_link_hash_defined
8983 || hash->elf.root.type == bfd_link_hash_defweak)
8984 {
8985 sym_value = hash->elf.root.u.def.value;
8986 if (sym_sec->output_section != NULL)
8987 ok_dest = TRUE;
8988 }
8989 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8990 ;
8991 else if (hash->elf.root.type == bfd_link_hash_undefined)
8992 ;
8993 else
8994 {
8995 bfd_set_error (bfd_error_bad_value);
8996 goto error_ret_free_internal;
8997 }
8998 }
8999
9000 destination = 0;
9001 if (ok_dest)
9002 {
9003 sym_value += irela->r_addend;
9004 destination = (sym_value
9005 + sym_sec->output_offset
9006 + sym_sec->output_section->vma);
9007 }
9008
9009 code_sec = sym_sec;
9010 opd_adjust = get_opd_info (sym_sec);
9011 if (opd_adjust != NULL)
9012 {
9013 bfd_vma dest;
9014
9015 if (hash == NULL)
9016 {
9017 long adjust = opd_adjust[sym_value / 8];
9018 if (adjust == -1)
9019 continue;
9020 sym_value += adjust;
9021 }
9022 dest = opd_entry_value (sym_sec, sym_value,
9023 &code_sec, &sym_value);
9024 if (dest != (bfd_vma) -1)
9025 {
9026 destination = dest;
9027 if (fdh != NULL)
9028 {
9029 /* Fixup old ABI sym to point at code
9030 entry. */
9031 hash->elf.root.type = bfd_link_hash_defweak;
9032 hash->elf.root.u.def.section = code_sec;
9033 hash->elf.root.u.def.value = sym_value;
9034 }
9035 }
9036 }
9037
9038 /* Determine what (if any) linker stub is needed. */
9039 stub_type = ppc_type_of_stub (section, irela, &hash,
9040 destination);
9041
9042 if (stub_type != ppc_stub_plt_call)
9043 {
9044 /* Check whether we need a TOC adjusting stub.
9045 Since the linker pastes together pieces from
9046 different object files when creating the
9047 _init and _fini functions, it may be that a
9048 call to what looks like a local sym is in
9049 fact a call needing a TOC adjustment. */
9050 if (code_sec != NULL
9051 && code_sec->output_section != NULL
9052 && (htab->stub_group[code_sec->id].toc_off
9053 != htab->stub_group[section->id].toc_off)
9054 && (code_sec->has_toc_reloc
9055 || code_sec->makes_toc_func_call))
9056 stub_type = ppc_stub_long_branch_r2off;
9057 }
9058
9059 if (stub_type == ppc_stub_none)
9060 continue;
9061
9062 /* __tls_get_addr calls might be eliminated. */
9063 if (stub_type != ppc_stub_plt_call
9064 && hash != NULL
9065 && (hash == htab->tls_get_addr
9066 || hash == htab->tls_get_addr_fd)
9067 && section->has_tls_reloc
9068 && irela != internal_relocs)
9069 {
9070 /* Get tls info. */
9071 char *tls_mask;
9072
9073 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9074 irela - 1, input_bfd))
9075 goto error_ret_free_internal;
9076 if (*tls_mask != 0)
9077 continue;
9078 }
9079
9080 /* Support for grouping stub sections. */
9081 id_sec = htab->stub_group[section->id].link_sec;
9082
9083 /* Get the name of this stub. */
9084 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9085 if (!stub_name)
9086 goto error_ret_free_internal;
9087
9088 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9089 stub_name, FALSE, FALSE);
9090 if (stub_entry != NULL)
9091 {
9092 /* The proper stub has already been created. */
9093 free (stub_name);
9094 continue;
9095 }
9096
9097 stub_entry = ppc_add_stub (stub_name, section, htab);
9098 if (stub_entry == NULL)
9099 {
9100 free (stub_name);
9101 error_ret_free_internal:
9102 if (elf_section_data (section)->relocs == NULL)
9103 free (internal_relocs);
9104 error_ret_free_local:
9105 if (local_syms != NULL
9106 && (symtab_hdr->contents
9107 != (unsigned char *) local_syms))
9108 free (local_syms);
9109 return FALSE;
9110 }
9111
9112 stub_entry->stub_type = stub_type;
9113 stub_entry->target_value = sym_value;
9114 stub_entry->target_section = code_sec;
9115 stub_entry->h = hash;
9116 stub_entry->addend = irela->r_addend;
9117
9118 if (stub_entry->h != NULL)
9119 htab->stub_globals += 1;
9120
9121 stub_changed = TRUE;
9122 }
9123
9124 /* We're done with the internal relocs, free them. */
9125 if (elf_section_data (section)->relocs != internal_relocs)
9126 free (internal_relocs);
9127 }
9128
9129 if (local_syms != NULL
9130 && symtab_hdr->contents != (unsigned char *) local_syms)
9131 {
9132 if (!info->keep_memory)
9133 free (local_syms);
9134 else
9135 symtab_hdr->contents = (unsigned char *) local_syms;
9136 }
9137 }
9138
9139 if (!stub_changed)
9140 break;
9141
9142 /* OK, we've added some stubs. Find out the new size of the
9143 stub sections. */
9144 for (stub_sec = htab->stub_bfd->sections;
9145 stub_sec != NULL;
9146 stub_sec = stub_sec->next)
9147 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9148 {
9149 stub_sec->size = 0;
9150 stub_sec->reloc_count = 0;
9151 }
9152
9153 htab->brlt->size = 0;
9154 if (htab->relbrlt != NULL)
9155 htab->relbrlt->size = 0;
9156
9157 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9158
9159 /* Ask the linker to do its stuff. */
9160 (*htab->layout_sections_again) ();
9161 }
9162
9163 /* It would be nice to strip .branch_lt from the output if the
9164 section is empty, but it's too late. If we strip sections here,
9165 the dynamic symbol table is corrupted since the section symbol
9166 for the stripped section isn't written. */
9167
9168 return TRUE;
9169 }
9170
9171 /* Called after we have determined section placement. If sections
9172 move, we'll be called again. Provide a value for TOCstart. */
9173
9174 bfd_vma
9175 ppc64_elf_toc (bfd *obfd)
9176 {
9177 asection *s;
9178 bfd_vma TOCstart;
9179
9180 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9181 order. The TOC starts where the first of these sections starts. */
9182 s = bfd_get_section_by_name (obfd, ".got");
9183 if (s == NULL)
9184 s = bfd_get_section_by_name (obfd, ".toc");
9185 if (s == NULL)
9186 s = bfd_get_section_by_name (obfd, ".tocbss");
9187 if (s == NULL)
9188 s = bfd_get_section_by_name (obfd, ".plt");
9189 if (s == NULL)
9190 {
9191 /* This may happen for
9192 o references to TOC base (SYM@toc / TOC[tc0]) without a
9193 .toc directive
9194 o bad linker script
9195 o --gc-sections and empty TOC sections
9196
9197 FIXME: Warn user? */
9198
9199 /* Look for a likely section. We probably won't even be
9200 using TOCstart. */
9201 for (s = obfd->sections; s != NULL; s = s->next)
9202 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9203 == (SEC_ALLOC | SEC_SMALL_DATA))
9204 break;
9205 if (s == NULL)
9206 for (s = obfd->sections; s != NULL; s = s->next)
9207 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9208 == (SEC_ALLOC | SEC_SMALL_DATA))
9209 break;
9210 if (s == NULL)
9211 for (s = obfd->sections; s != NULL; s = s->next)
9212 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9213 break;
9214 if (s == NULL)
9215 for (s = obfd->sections; s != NULL; s = s->next)
9216 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9217 break;
9218 }
9219
9220 TOCstart = 0;
9221 if (s != NULL)
9222 TOCstart = s->output_section->vma + s->output_offset;
9223
9224 return TOCstart;
9225 }
9226
9227 /* Build all the stubs associated with the current output file.
9228 The stubs are kept in a hash table attached to the main linker
9229 hash table. This function is called via gldelf64ppc_finish. */
9230
9231 bfd_boolean
9232 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9233 struct bfd_link_info *info,
9234 char **stats)
9235 {
9236 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9237 asection *stub_sec;
9238 bfd_byte *p;
9239 int stub_sec_count = 0;
9240
9241 htab->emit_stub_syms = emit_stub_syms;
9242
9243 /* Allocate memory to hold the linker stubs. */
9244 for (stub_sec = htab->stub_bfd->sections;
9245 stub_sec != NULL;
9246 stub_sec = stub_sec->next)
9247 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9248 && stub_sec->size != 0)
9249 {
9250 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9251 if (stub_sec->contents == NULL)
9252 return FALSE;
9253 /* We want to check that built size is the same as calculated
9254 size. rawsize is a convenient location to use. */
9255 stub_sec->rawsize = stub_sec->size;
9256 stub_sec->size = 0;
9257 }
9258
9259 if (htab->plt != NULL)
9260 {
9261 unsigned int indx;
9262 bfd_vma plt0;
9263
9264 /* Build the .glink plt call stub. */
9265 plt0 = (htab->plt->output_section->vma
9266 + htab->plt->output_offset
9267 - (htab->glink->output_section->vma
9268 + htab->glink->output_offset
9269 + GLINK_CALL_STUB_SIZE));
9270 if (plt0 + 0x80008000 > 0xffffffff)
9271 {
9272 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9273 bfd_set_error (bfd_error_bad_value);
9274 return FALSE;
9275 }
9276
9277 if (htab->emit_stub_syms)
9278 {
9279 struct elf_link_hash_entry *h;
9280 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9281 if (h == NULL)
9282 return FALSE;
9283 if (h->root.type == bfd_link_hash_new)
9284 {
9285 h->root.type = bfd_link_hash_defined;
9286 h->root.u.def.section = htab->glink;
9287 h->root.u.def.value = 0;
9288 h->ref_regular = 1;
9289 h->def_regular = 1;
9290 h->ref_regular_nonweak = 1;
9291 h->forced_local = 1;
9292 h->non_elf = 0;
9293 }
9294 }
9295 p = htab->glink->contents;
9296 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9297 p += 4;
9298 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9299 p += 4;
9300 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9301 p += 4;
9302 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9303 p += 4;
9304 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9305 p += 4;
9306 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9307 p += 4;
9308 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9309 p += 4;
9310 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9311 p += 4;
9312 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9313 p += 4;
9314 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9315 p += 4;
9316 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9317 p += 4;
9318 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9319 p += 4;
9320 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9321 p += 4;
9322 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9323 p += 4;
9324 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9325 p += 4;
9326 bfd_put_32 (htab->glink->owner, BCTR, p);
9327 p += 4;
9328
9329 /* Build the .glink lazy link call stubs. */
9330 indx = 0;
9331 while (p < htab->glink->contents + htab->glink->size)
9332 {
9333 if (indx < 0x8000)
9334 {
9335 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9336 p += 4;
9337 }
9338 else
9339 {
9340 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9341 p += 4;
9342 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9343 p += 4;
9344 }
9345 bfd_put_32 (htab->glink->owner,
9346 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9347 indx++;
9348 p += 4;
9349 }
9350 htab->glink->rawsize = p - htab->glink->contents;
9351 }
9352
9353 if (htab->brlt->size != 0)
9354 {
9355 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9356 htab->brlt->size);
9357 if (htab->brlt->contents == NULL)
9358 return FALSE;
9359 }
9360 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9361 {
9362 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9363 htab->relbrlt->size);
9364 if (htab->relbrlt->contents == NULL)
9365 return FALSE;
9366 }
9367
9368 /* Build the stubs as directed by the stub hash table. */
9369 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9370
9371 for (stub_sec = htab->stub_bfd->sections;
9372 stub_sec != NULL;
9373 stub_sec = stub_sec->next)
9374 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9375 {
9376 stub_sec_count += 1;
9377 if (stub_sec->rawsize != stub_sec->size)
9378 break;
9379 }
9380
9381 if (stub_sec != NULL
9382 || htab->glink->rawsize != htab->glink->size)
9383 {
9384 htab->stub_error = TRUE;
9385 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9386 }
9387
9388 if (htab->stub_error)
9389 return FALSE;
9390
9391 if (stats != NULL)
9392 {
9393 *stats = bfd_malloc (500);
9394 if (*stats == NULL)
9395 return FALSE;
9396
9397 sprintf (*stats, _("linker stubs in %u group%s\n"
9398 " branch %lu\n"
9399 " toc adjust %lu\n"
9400 " long branch %lu\n"
9401 " long toc adj %lu\n"
9402 " plt call %lu"),
9403 stub_sec_count,
9404 stub_sec_count == 1 ? "" : "s",
9405 htab->stub_count[ppc_stub_long_branch - 1],
9406 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9407 htab->stub_count[ppc_stub_plt_branch - 1],
9408 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9409 htab->stub_count[ppc_stub_plt_call - 1]);
9410 }
9411 return TRUE;
9412 }
9413
9414 /* This function undoes the changes made by add_symbol_adjust. */
9415
9416 static bfd_boolean
9417 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9418 {
9419 struct ppc_link_hash_entry *eh;
9420
9421 if (h->root.type == bfd_link_hash_indirect)
9422 return TRUE;
9423
9424 if (h->root.type == bfd_link_hash_warning)
9425 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9426
9427 eh = (struct ppc_link_hash_entry *) h;
9428 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9429 return TRUE;
9430
9431 eh->elf.root.type = bfd_link_hash_undefined;
9432 return TRUE;
9433 }
9434
9435 void
9436 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9437 {
9438 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9439 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9440 }
9441
9442 /* The RELOCATE_SECTION function is called by the ELF backend linker
9443 to handle the relocations for a section.
9444
9445 The relocs are always passed as Rela structures; if the section
9446 actually uses Rel structures, the r_addend field will always be
9447 zero.
9448
9449 This function is responsible for adjust the section contents as
9450 necessary, and (if using Rela relocs and generating a
9451 relocatable output file) adjusting the reloc addend as
9452 necessary.
9453
9454 This function does not have to worry about setting the reloc
9455 address or the reloc symbol index.
9456
9457 LOCAL_SYMS is a pointer to the swapped in local symbols.
9458
9459 LOCAL_SECTIONS is an array giving the section in the input file
9460 corresponding to the st_shndx field of each local symbol.
9461
9462 The global hash table entry for the global symbols can be found
9463 via elf_sym_hashes (input_bfd).
9464
9465 When generating relocatable output, this function must handle
9466 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9467 going to be the section symbol corresponding to the output
9468 section, which means that the addend must be adjusted
9469 accordingly. */
9470
9471 static bfd_boolean
9472 ppc64_elf_relocate_section (bfd *output_bfd,
9473 struct bfd_link_info *info,
9474 bfd *input_bfd,
9475 asection *input_section,
9476 bfd_byte *contents,
9477 Elf_Internal_Rela *relocs,
9478 Elf_Internal_Sym *local_syms,
9479 asection **local_sections)
9480 {
9481 struct ppc_link_hash_table *htab;
9482 Elf_Internal_Shdr *symtab_hdr;
9483 struct elf_link_hash_entry **sym_hashes;
9484 Elf_Internal_Rela *rel;
9485 Elf_Internal_Rela *relend;
9486 Elf_Internal_Rela outrel;
9487 bfd_byte *loc;
9488 struct got_entry **local_got_ents;
9489 bfd_vma TOCstart;
9490 bfd_boolean ret = TRUE;
9491 bfd_boolean is_opd;
9492 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9493 bfd_boolean is_power4 = FALSE;
9494
9495 if (info->relocatable)
9496 return TRUE;
9497
9498 /* Initialize howto table if needed. */
9499 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9500 ppc_howto_init ();
9501
9502 htab = ppc_hash_table (info);
9503
9504 /* Don't relocate stub sections. */
9505 if (input_section->owner == htab->stub_bfd)
9506 return TRUE;
9507
9508 local_got_ents = elf_local_got_ents (input_bfd);
9509 TOCstart = elf_gp (output_bfd);
9510 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9511 sym_hashes = elf_sym_hashes (input_bfd);
9512 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9513
9514 rel = relocs;
9515 relend = relocs + input_section->reloc_count;
9516 for (; rel < relend; rel++)
9517 {
9518 enum elf_ppc64_reloc_type r_type;
9519 bfd_vma addend;
9520 bfd_reloc_status_type r;
9521 Elf_Internal_Sym *sym;
9522 asection *sec;
9523 struct elf_link_hash_entry *h_elf;
9524 struct ppc_link_hash_entry *h;
9525 struct ppc_link_hash_entry *fdh;
9526 const char *sym_name;
9527 unsigned long r_symndx, toc_symndx;
9528 char tls_mask, tls_gd, tls_type;
9529 char sym_type;
9530 bfd_vma relocation;
9531 bfd_boolean unresolved_reloc;
9532 bfd_boolean warned;
9533 unsigned long insn, mask;
9534 struct ppc_stub_hash_entry *stub_entry;
9535 bfd_vma max_br_offset;
9536 bfd_vma from;
9537
9538 r_type = ELF64_R_TYPE (rel->r_info);
9539 r_symndx = ELF64_R_SYM (rel->r_info);
9540
9541 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9542 symbol of the previous ADDR64 reloc. The symbol gives us the
9543 proper TOC base to use. */
9544 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9545 && rel != relocs
9546 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9547 && is_opd)
9548 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9549
9550 sym = NULL;
9551 sec = NULL;
9552 h_elf = NULL;
9553 sym_name = NULL;
9554 unresolved_reloc = FALSE;
9555 warned = FALSE;
9556
9557 if (r_symndx < symtab_hdr->sh_info)
9558 {
9559 /* It's a local symbol. */
9560 long *opd_adjust;
9561
9562 sym = local_syms + r_symndx;
9563 sec = local_sections[r_symndx];
9564 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9565 sym_type = ELF64_ST_TYPE (sym->st_info);
9566 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9567 opd_adjust = get_opd_info (sec);
9568 if (opd_adjust != NULL)
9569 {
9570 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9571 if (adjust == -1)
9572 relocation = 0;
9573 else
9574 relocation += adjust;
9575 }
9576 }
9577 else
9578 {
9579 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9580 r_symndx, symtab_hdr, sym_hashes,
9581 h_elf, sec, relocation,
9582 unresolved_reloc, warned);
9583 sym_name = h_elf->root.root.string;
9584 sym_type = h_elf->type;
9585 }
9586 h = (struct ppc_link_hash_entry *) h_elf;
9587
9588 /* TLS optimizations. Replace instruction sequences and relocs
9589 based on information we collected in tls_optimize. We edit
9590 RELOCS so that --emit-relocs will output something sensible
9591 for the final instruction stream. */
9592 tls_mask = 0;
9593 tls_gd = 0;
9594 toc_symndx = 0;
9595 if (IS_PPC64_TLS_RELOC (r_type))
9596 {
9597 if (h != NULL)
9598 tls_mask = h->tls_mask;
9599 else if (local_got_ents != NULL)
9600 {
9601 char *lgot_masks;
9602 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9603 tls_mask = lgot_masks[r_symndx];
9604 }
9605 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9606 {
9607 /* Check for toc tls entries. */
9608 char *toc_tls;
9609
9610 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9611 rel, input_bfd))
9612 return FALSE;
9613
9614 if (toc_tls)
9615 tls_mask = *toc_tls;
9616 }
9617 }
9618
9619 /* Check that tls relocs are used with tls syms, and non-tls
9620 relocs are used with non-tls syms. */
9621 if (r_symndx != 0
9622 && r_type != R_PPC64_NONE
9623 && (h == NULL
9624 || h->elf.root.type == bfd_link_hash_defined
9625 || h->elf.root.type == bfd_link_hash_defweak)
9626 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9627 {
9628 if (r_type == R_PPC64_TLS && tls_mask != 0)
9629 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9630 ;
9631 else
9632 (*_bfd_error_handler)
9633 (sym_type == STT_TLS
9634 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9635 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9636 input_bfd,
9637 input_section,
9638 (long) rel->r_offset,
9639 ppc64_elf_howto_table[r_type]->name,
9640 sym_name);
9641 }
9642
9643 /* Ensure reloc mapping code below stays sane. */
9644 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9645 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9646 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9647 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9648 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9649 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9650 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9651 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9652 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9653 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9654 abort ();
9655
9656 switch (r_type)
9657 {
9658 default:
9659 break;
9660
9661 case R_PPC64_TOC16:
9662 case R_PPC64_TOC16_LO:
9663 case R_PPC64_TOC16_DS:
9664 case R_PPC64_TOC16_LO_DS:
9665 {
9666 /* Check for toc tls entries. */
9667 char *toc_tls;
9668 int retval;
9669
9670 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9671 rel, input_bfd);
9672 if (retval == 0)
9673 return FALSE;
9674
9675 if (toc_tls)
9676 {
9677 tls_mask = *toc_tls;
9678 if (r_type == R_PPC64_TOC16_DS
9679 || r_type == R_PPC64_TOC16_LO_DS)
9680 {
9681 if (tls_mask != 0
9682 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9683 goto toctprel;
9684 }
9685 else
9686 {
9687 /* If we found a GD reloc pair, then we might be
9688 doing a GD->IE transition. */
9689 if (retval == 2)
9690 {
9691 tls_gd = TLS_TPRELGD;
9692 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9693 goto tls_get_addr_check;
9694 }
9695 else if (retval == 3)
9696 {
9697 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9698 goto tls_get_addr_check;
9699 }
9700 }
9701 }
9702 }
9703 break;
9704
9705 case R_PPC64_GOT_TPREL16_DS:
9706 case R_PPC64_GOT_TPREL16_LO_DS:
9707 if (tls_mask != 0
9708 && (tls_mask & TLS_TPREL) == 0)
9709 {
9710 toctprel:
9711 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9712 insn &= 31 << 21;
9713 insn |= 0x3c0d0000; /* addis 0,13,0 */
9714 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9715 r_type = R_PPC64_TPREL16_HA;
9716 if (toc_symndx != 0)
9717 {
9718 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9719 /* We changed the symbol. Start over in order to
9720 get h, sym, sec etc. right. */
9721 rel--;
9722 continue;
9723 }
9724 else
9725 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9726 }
9727 break;
9728
9729 case R_PPC64_TLS:
9730 if (tls_mask != 0
9731 && (tls_mask & TLS_TPREL) == 0)
9732 {
9733 bfd_vma rtra;
9734 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9735 if ((insn & ((0x3f << 26) | (31 << 11)))
9736 == ((31 << 26) | (13 << 11)))
9737 rtra = insn & ((1 << 26) - (1 << 16));
9738 else if ((insn & ((0x3f << 26) | (31 << 16)))
9739 == ((31 << 26) | (13 << 16)))
9740 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9741 else
9742 abort ();
9743 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9744 /* add -> addi. */
9745 insn = 14 << 26;
9746 else if ((insn & (31 << 1)) == 23 << 1
9747 && ((insn & (31 << 6)) < 14 << 6
9748 || ((insn & (31 << 6)) >= 16 << 6
9749 && (insn & (31 << 6)) < 24 << 6)))
9750 /* load and store indexed -> dform. */
9751 insn = (32 | ((insn >> 6) & 31)) << 26;
9752 else if ((insn & (31 << 1)) == 21 << 1
9753 && (insn & (0x1a << 6)) == 0)
9754 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9755 insn = (((58 | ((insn >> 6) & 4)) << 26)
9756 | ((insn >> 6) & 1));
9757 else if ((insn & (31 << 1)) == 21 << 1
9758 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9759 /* lwax -> lwa. */
9760 insn = (58 << 26) | 2;
9761 else
9762 abort ();
9763 insn |= rtra;
9764 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9765 /* Was PPC64_TLS which sits on insn boundary, now
9766 PPC64_TPREL16_LO which is at insn+2. */
9767 rel->r_offset += 2;
9768 r_type = R_PPC64_TPREL16_LO;
9769 if (toc_symndx != 0)
9770 {
9771 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9772 /* We changed the symbol. Start over in order to
9773 get h, sym, sec etc. right. */
9774 rel--;
9775 continue;
9776 }
9777 else
9778 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9779 }
9780 break;
9781
9782 case R_PPC64_GOT_TLSGD16_HI:
9783 case R_PPC64_GOT_TLSGD16_HA:
9784 tls_gd = TLS_TPRELGD;
9785 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9786 goto tls_gdld_hi;
9787 break;
9788
9789 case R_PPC64_GOT_TLSLD16_HI:
9790 case R_PPC64_GOT_TLSLD16_HA:
9791 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9792 {
9793 tls_gdld_hi:
9794 if ((tls_mask & tls_gd) != 0)
9795 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9796 + R_PPC64_GOT_TPREL16_DS);
9797 else
9798 {
9799 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9800 rel->r_offset -= 2;
9801 r_type = R_PPC64_NONE;
9802 }
9803 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9804 }
9805 break;
9806
9807 case R_PPC64_GOT_TLSGD16:
9808 case R_PPC64_GOT_TLSGD16_LO:
9809 tls_gd = TLS_TPRELGD;
9810 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9811 goto tls_get_addr_check;
9812 break;
9813
9814 case R_PPC64_GOT_TLSLD16:
9815 case R_PPC64_GOT_TLSLD16_LO:
9816 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9817 {
9818 tls_get_addr_check:
9819 if (rel + 1 < relend)
9820 {
9821 enum elf_ppc64_reloc_type r_type2;
9822 unsigned long r_symndx2;
9823 struct elf_link_hash_entry *h2;
9824 bfd_vma insn1, insn2, insn3;
9825 bfd_vma offset;
9826
9827 /* The next instruction should be a call to
9828 __tls_get_addr. Peek at the reloc to be sure. */
9829 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9830 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9831 if (r_symndx2 < symtab_hdr->sh_info
9832 || (r_type2 != R_PPC64_REL14
9833 && r_type2 != R_PPC64_REL14_BRTAKEN
9834 && r_type2 != R_PPC64_REL14_BRNTAKEN
9835 && r_type2 != R_PPC64_REL24))
9836 break;
9837
9838 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9839 while (h2->root.type == bfd_link_hash_indirect
9840 || h2->root.type == bfd_link_hash_warning)
9841 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9842 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9843 && h2 != &htab->tls_get_addr_fd->elf))
9844 break;
9845
9846 /* OK, it checks out. Replace the call. */
9847 offset = rel[1].r_offset;
9848 insn1 = bfd_get_32 (output_bfd,
9849 contents + rel->r_offset - 2);
9850 insn3 = bfd_get_32 (output_bfd,
9851 contents + offset + 4);
9852 if ((tls_mask & tls_gd) != 0)
9853 {
9854 /* IE */
9855 insn1 &= (1 << 26) - (1 << 2);
9856 insn1 |= 58 << 26; /* ld */
9857 insn2 = 0x7c636a14; /* add 3,3,13 */
9858 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9859 if ((tls_mask & TLS_EXPLICIT) == 0)
9860 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9861 + R_PPC64_GOT_TPREL16_DS);
9862 else
9863 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9864 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9865 }
9866 else
9867 {
9868 /* LE */
9869 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9870 insn2 = 0x38630000; /* addi 3,3,0 */
9871 if (tls_gd == 0)
9872 {
9873 /* Was an LD reloc. */
9874 r_symndx = 0;
9875 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9876 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9877 }
9878 else if (toc_symndx != 0)
9879 r_symndx = toc_symndx;
9880 r_type = R_PPC64_TPREL16_HA;
9881 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9882 rel[1].r_info = ELF64_R_INFO (r_symndx,
9883 R_PPC64_TPREL16_LO);
9884 rel[1].r_offset += 2;
9885 }
9886 if (insn3 == NOP
9887 || insn3 == CROR_151515 || insn3 == CROR_313131)
9888 {
9889 insn3 = insn2;
9890 insn2 = NOP;
9891 rel[1].r_offset += 4;
9892 }
9893 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9894 bfd_put_32 (output_bfd, insn2, contents + offset);
9895 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9896 if (tls_gd == 0 || toc_symndx != 0)
9897 {
9898 /* We changed the symbol. Start over in order
9899 to get h, sym, sec etc. right. */
9900 rel--;
9901 continue;
9902 }
9903 }
9904 }
9905 break;
9906
9907 case R_PPC64_DTPMOD64:
9908 if (rel + 1 < relend
9909 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9910 && rel[1].r_offset == rel->r_offset + 8)
9911 {
9912 if ((tls_mask & TLS_GD) == 0)
9913 {
9914 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9915 if ((tls_mask & TLS_TPRELGD) != 0)
9916 r_type = R_PPC64_TPREL64;
9917 else
9918 {
9919 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9920 r_type = R_PPC64_NONE;
9921 }
9922 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9923 }
9924 }
9925 else
9926 {
9927 if ((tls_mask & TLS_LD) == 0)
9928 {
9929 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9930 r_type = R_PPC64_NONE;
9931 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9932 }
9933 }
9934 break;
9935
9936 case R_PPC64_TPREL64:
9937 if ((tls_mask & TLS_TPREL) == 0)
9938 {
9939 r_type = R_PPC64_NONE;
9940 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9941 }
9942 break;
9943 }
9944
9945 /* Handle other relocations that tweak non-addend part of insn. */
9946 insn = 0;
9947 max_br_offset = 1 << 25;
9948 addend = rel->r_addend;
9949 switch (r_type)
9950 {
9951 default:
9952 break;
9953
9954 /* Branch taken prediction relocations. */
9955 case R_PPC64_ADDR14_BRTAKEN:
9956 case R_PPC64_REL14_BRTAKEN:
9957 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9958 /* Fall thru. */
9959
9960 /* Branch not taken prediction relocations. */
9961 case R_PPC64_ADDR14_BRNTAKEN:
9962 case R_PPC64_REL14_BRNTAKEN:
9963 insn |= bfd_get_32 (output_bfd,
9964 contents + rel->r_offset) & ~(0x01 << 21);
9965 /* Fall thru. */
9966
9967 case R_PPC64_REL14:
9968 max_br_offset = 1 << 15;
9969 /* Fall thru. */
9970
9971 case R_PPC64_REL24:
9972 /* Calls to functions with a different TOC, such as calls to
9973 shared objects, need to alter the TOC pointer. This is
9974 done using a linkage stub. A REL24 branching to these
9975 linkage stubs needs to be followed by a nop, as the nop
9976 will be replaced with an instruction to restore the TOC
9977 base pointer. */
9978 stub_entry = NULL;
9979 fdh = h;
9980 if (((h != NULL
9981 && (((fdh = h->oh) != NULL
9982 && fdh->elf.plt.plist != NULL)
9983 || (fdh = h)->elf.plt.plist != NULL))
9984 || (sec != NULL
9985 && sec->output_section != NULL
9986 && sec->id <= htab->top_id
9987 && (htab->stub_group[sec->id].toc_off
9988 != htab->stub_group[input_section->id].toc_off)))
9989 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9990 rel, htab)) != NULL
9991 && (stub_entry->stub_type == ppc_stub_plt_call
9992 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9993 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9994 {
9995 bfd_boolean can_plt_call = FALSE;
9996
9997 if (rel->r_offset + 8 <= input_section->size)
9998 {
9999 unsigned long nop;
10000 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10001 if (nop == NOP
10002 || nop == CROR_151515 || nop == CROR_313131)
10003 {
10004 bfd_put_32 (input_bfd, LD_R2_40R1,
10005 contents + rel->r_offset + 4);
10006 can_plt_call = TRUE;
10007 }
10008 }
10009
10010 if (!can_plt_call)
10011 {
10012 if (stub_entry->stub_type == ppc_stub_plt_call)
10013 {
10014 /* If this is a plain branch rather than a branch
10015 and link, don't require a nop. */
10016 unsigned long br;
10017 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10018 if ((br & 1) == 0)
10019 can_plt_call = TRUE;
10020 }
10021 else if (h != NULL
10022 && strcmp (h->elf.root.root.string,
10023 ".__libc_start_main") == 0)
10024 {
10025 /* Allow crt1 branch to go via a toc adjusting stub. */
10026 can_plt_call = TRUE;
10027 }
10028 else
10029 {
10030 if (strcmp (input_section->output_section->name,
10031 ".init") == 0
10032 || strcmp (input_section->output_section->name,
10033 ".fini") == 0)
10034 (*_bfd_error_handler)
10035 (_("%B(%A+0x%lx): automatic multiple TOCs "
10036 "not supported using your crt files; "
10037 "recompile with -mminimal-toc or upgrade gcc"),
10038 input_bfd,
10039 input_section,
10040 (long) rel->r_offset);
10041 else
10042 (*_bfd_error_handler)
10043 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10044 "does not allow automatic multiple TOCs; "
10045 "recompile with -mminimal-toc or "
10046 "-fno-optimize-sibling-calls, "
10047 "or make `%s' extern"),
10048 input_bfd,
10049 input_section,
10050 (long) rel->r_offset,
10051 sym_name,
10052 sym_name);
10053 bfd_set_error (bfd_error_bad_value);
10054 ret = FALSE;
10055 }
10056 }
10057
10058 if (can_plt_call
10059 && stub_entry->stub_type == ppc_stub_plt_call)
10060 unresolved_reloc = FALSE;
10061 }
10062
10063 if (stub_entry == NULL
10064 && get_opd_info (sec) != NULL)
10065 {
10066 /* The branch destination is the value of the opd entry. */
10067 bfd_vma off = (relocation - sec->output_section->vma
10068 - sec->output_offset + rel->r_addend);
10069 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10070 if (dest != (bfd_vma) -1)
10071 {
10072 relocation = dest;
10073 addend = 0;
10074 }
10075 }
10076
10077 /* If the branch is out of reach we ought to have a long
10078 branch stub. */
10079 from = (rel->r_offset
10080 + input_section->output_offset
10081 + input_section->output_section->vma);
10082
10083 if (stub_entry == NULL
10084 && (relocation + rel->r_addend - from + max_br_offset
10085 >= 2 * max_br_offset)
10086 && r_type != R_PPC64_ADDR14_BRTAKEN
10087 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10088 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10089 htab);
10090
10091 if (stub_entry != NULL)
10092 {
10093 /* Munge up the value and addend so that we call the stub
10094 rather than the procedure directly. */
10095 relocation = (stub_entry->stub_offset
10096 + stub_entry->stub_sec->output_offset
10097 + stub_entry->stub_sec->output_section->vma);
10098 addend = 0;
10099 }
10100
10101 if (insn != 0)
10102 {
10103 if (is_power4)
10104 {
10105 /* Set 'a' bit. This is 0b00010 in BO field for branch
10106 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10107 for branch on CTR insns (BO == 1a00t or 1a01t). */
10108 if ((insn & (0x14 << 21)) == (0x04 << 21))
10109 insn |= 0x02 << 21;
10110 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10111 insn |= 0x08 << 21;
10112 else
10113 break;
10114 }
10115 else
10116 {
10117 /* Invert 'y' bit if not the default. */
10118 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
10119 insn ^= 0x01 << 21;
10120 }
10121
10122 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10123 }
10124
10125 /* NOP out calls to undefined weak functions.
10126 We can thus call a weak function without first
10127 checking whether the function is defined. */
10128 else if (h != NULL
10129 && h->elf.root.type == bfd_link_hash_undefweak
10130 && r_type == R_PPC64_REL24
10131 && relocation == 0
10132 && rel->r_addend == 0)
10133 {
10134 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10135 continue;
10136 }
10137 break;
10138 }
10139
10140 /* Set `addend'. */
10141 tls_type = 0;
10142 switch (r_type)
10143 {
10144 default:
10145 (*_bfd_error_handler)
10146 (_("%B: unknown relocation type %d for symbol %s"),
10147 input_bfd, (int) r_type, sym_name);
10148
10149 bfd_set_error (bfd_error_bad_value);
10150 ret = FALSE;
10151 continue;
10152
10153 case R_PPC64_NONE:
10154 case R_PPC64_TLS:
10155 case R_PPC64_GNU_VTINHERIT:
10156 case R_PPC64_GNU_VTENTRY:
10157 continue;
10158
10159 /* GOT16 relocations. Like an ADDR16 using the symbol's
10160 address in the GOT as relocation value instead of the
10161 symbol's value itself. Also, create a GOT entry for the
10162 symbol and put the symbol value there. */
10163 case R_PPC64_GOT_TLSGD16:
10164 case R_PPC64_GOT_TLSGD16_LO:
10165 case R_PPC64_GOT_TLSGD16_HI:
10166 case R_PPC64_GOT_TLSGD16_HA:
10167 tls_type = TLS_TLS | TLS_GD;
10168 goto dogot;
10169
10170 case R_PPC64_GOT_TLSLD16:
10171 case R_PPC64_GOT_TLSLD16_LO:
10172 case R_PPC64_GOT_TLSLD16_HI:
10173 case R_PPC64_GOT_TLSLD16_HA:
10174 tls_type = TLS_TLS | TLS_LD;
10175 goto dogot;
10176
10177 case R_PPC64_GOT_TPREL16_DS:
10178 case R_PPC64_GOT_TPREL16_LO_DS:
10179 case R_PPC64_GOT_TPREL16_HI:
10180 case R_PPC64_GOT_TPREL16_HA:
10181 tls_type = TLS_TLS | TLS_TPREL;
10182 goto dogot;
10183
10184 case R_PPC64_GOT_DTPREL16_DS:
10185 case R_PPC64_GOT_DTPREL16_LO_DS:
10186 case R_PPC64_GOT_DTPREL16_HI:
10187 case R_PPC64_GOT_DTPREL16_HA:
10188 tls_type = TLS_TLS | TLS_DTPREL;
10189 goto dogot;
10190
10191 case R_PPC64_GOT16:
10192 case R_PPC64_GOT16_LO:
10193 case R_PPC64_GOT16_HI:
10194 case R_PPC64_GOT16_HA:
10195 case R_PPC64_GOT16_DS:
10196 case R_PPC64_GOT16_LO_DS:
10197 dogot:
10198 {
10199 /* Relocation is to the entry for this symbol in the global
10200 offset table. */
10201 asection *got;
10202 bfd_vma *offp;
10203 bfd_vma off;
10204 unsigned long indx = 0;
10205
10206 if (tls_type == (TLS_TLS | TLS_LD)
10207 && (h == NULL
10208 || !h->elf.def_dynamic))
10209 offp = &ppc64_tlsld_got (input_bfd)->offset;
10210 else
10211 {
10212 struct got_entry *ent;
10213
10214 if (h != NULL)
10215 {
10216 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10217 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10218 &h->elf)
10219 || (info->shared
10220 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10221 /* This is actually a static link, or it is a
10222 -Bsymbolic link and the symbol is defined
10223 locally, or the symbol was forced to be local
10224 because of a version file. */
10225 ;
10226 else
10227 {
10228 indx = h->elf.dynindx;
10229 unresolved_reloc = FALSE;
10230 }
10231 ent = h->elf.got.glist;
10232 }
10233 else
10234 {
10235 if (local_got_ents == NULL)
10236 abort ();
10237 ent = local_got_ents[r_symndx];
10238 }
10239
10240 for (; ent != NULL; ent = ent->next)
10241 if (ent->addend == rel->r_addend
10242 && ent->owner == input_bfd
10243 && ent->tls_type == tls_type)
10244 break;
10245 if (ent == NULL)
10246 abort ();
10247 offp = &ent->got.offset;
10248 }
10249
10250 got = ppc64_elf_tdata (input_bfd)->got;
10251 if (got == NULL)
10252 abort ();
10253
10254 /* The offset must always be a multiple of 8. We use the
10255 least significant bit to record whether we have already
10256 processed this entry. */
10257 off = *offp;
10258 if ((off & 1) != 0)
10259 off &= ~1;
10260 else
10261 {
10262 /* Generate relocs for the dynamic linker, except in
10263 the case of TLSLD where we'll use one entry per
10264 module. */
10265 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10266
10267 *offp = off | 1;
10268 if ((info->shared || indx != 0)
10269 && (h == NULL
10270 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10271 || h->elf.root.type != bfd_link_hash_undefweak))
10272 {
10273 outrel.r_offset = (got->output_section->vma
10274 + got->output_offset
10275 + off);
10276 outrel.r_addend = rel->r_addend;
10277 if (tls_type & (TLS_LD | TLS_GD))
10278 {
10279 outrel.r_addend = 0;
10280 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10281 if (tls_type == (TLS_TLS | TLS_GD))
10282 {
10283 loc = relgot->contents;
10284 loc += (relgot->reloc_count++
10285 * sizeof (Elf64_External_Rela));
10286 bfd_elf64_swap_reloca_out (output_bfd,
10287 &outrel, loc);
10288 outrel.r_offset += 8;
10289 outrel.r_addend = rel->r_addend;
10290 outrel.r_info
10291 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10292 }
10293 }
10294 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10295 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10296 else if (tls_type == (TLS_TLS | TLS_TPREL))
10297 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10298 else if (indx == 0)
10299 {
10300 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10301
10302 /* Write the .got section contents for the sake
10303 of prelink. */
10304 loc = got->contents + off;
10305 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10306 loc);
10307 }
10308 else
10309 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10310
10311 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10312 {
10313 outrel.r_addend += relocation;
10314 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10315 outrel.r_addend -= htab->elf.tls_sec->vma;
10316 }
10317 loc = relgot->contents;
10318 loc += (relgot->reloc_count++
10319 * sizeof (Elf64_External_Rela));
10320 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10321 }
10322
10323 /* Init the .got section contents here if we're not
10324 emitting a reloc. */
10325 else
10326 {
10327 relocation += rel->r_addend;
10328 if (tls_type == (TLS_TLS | TLS_LD))
10329 relocation = 1;
10330 else if (tls_type != 0)
10331 {
10332 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10333 if (tls_type == (TLS_TLS | TLS_TPREL))
10334 relocation += DTP_OFFSET - TP_OFFSET;
10335
10336 if (tls_type == (TLS_TLS | TLS_GD))
10337 {
10338 bfd_put_64 (output_bfd, relocation,
10339 got->contents + off + 8);
10340 relocation = 1;
10341 }
10342 }
10343
10344 bfd_put_64 (output_bfd, relocation,
10345 got->contents + off);
10346 }
10347 }
10348
10349 if (off >= (bfd_vma) -2)
10350 abort ();
10351
10352 relocation = got->output_offset + off;
10353
10354 /* TOC base (r2) is TOC start plus 0x8000. */
10355 addend = -TOC_BASE_OFF;
10356 }
10357 break;
10358
10359 case R_PPC64_PLT16_HA:
10360 case R_PPC64_PLT16_HI:
10361 case R_PPC64_PLT16_LO:
10362 case R_PPC64_PLT32:
10363 case R_PPC64_PLT64:
10364 /* Relocation is to the entry for this symbol in the
10365 procedure linkage table. */
10366
10367 /* Resolve a PLT reloc against a local symbol directly,
10368 without using the procedure linkage table. */
10369 if (h == NULL)
10370 break;
10371
10372 /* It's possible that we didn't make a PLT entry for this
10373 symbol. This happens when statically linking PIC code,
10374 or when using -Bsymbolic. Go find a match if there is a
10375 PLT entry. */
10376 if (htab->plt != NULL)
10377 {
10378 struct plt_entry *ent;
10379 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10380 if (ent->addend == rel->r_addend
10381 && ent->plt.offset != (bfd_vma) -1)
10382 {
10383 relocation = (htab->plt->output_section->vma
10384 + htab->plt->output_offset
10385 + ent->plt.offset);
10386 unresolved_reloc = FALSE;
10387 }
10388 }
10389 break;
10390
10391 case R_PPC64_TOC:
10392 /* Relocation value is TOC base. */
10393 relocation = TOCstart;
10394 if (r_symndx == 0)
10395 relocation += htab->stub_group[input_section->id].toc_off;
10396 else if (unresolved_reloc)
10397 ;
10398 else if (sec != NULL && sec->id <= htab->top_id)
10399 relocation += htab->stub_group[sec->id].toc_off;
10400 else
10401 unresolved_reloc = TRUE;
10402 goto dodyn2;
10403
10404 /* TOC16 relocs. We want the offset relative to the TOC base,
10405 which is the address of the start of the TOC plus 0x8000.
10406 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10407 in this order. */
10408 case R_PPC64_TOC16:
10409 case R_PPC64_TOC16_LO:
10410 case R_PPC64_TOC16_HI:
10411 case R_PPC64_TOC16_DS:
10412 case R_PPC64_TOC16_LO_DS:
10413 case R_PPC64_TOC16_HA:
10414 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10415 break;
10416
10417 /* Relocate against the beginning of the section. */
10418 case R_PPC64_SECTOFF:
10419 case R_PPC64_SECTOFF_LO:
10420 case R_PPC64_SECTOFF_HI:
10421 case R_PPC64_SECTOFF_DS:
10422 case R_PPC64_SECTOFF_LO_DS:
10423 case R_PPC64_SECTOFF_HA:
10424 if (sec != NULL)
10425 addend -= sec->output_section->vma;
10426 break;
10427
10428 case R_PPC64_REL14:
10429 case R_PPC64_REL14_BRNTAKEN:
10430 case R_PPC64_REL14_BRTAKEN:
10431 case R_PPC64_REL24:
10432 break;
10433
10434 case R_PPC64_TPREL16:
10435 case R_PPC64_TPREL16_LO:
10436 case R_PPC64_TPREL16_HI:
10437 case R_PPC64_TPREL16_HA:
10438 case R_PPC64_TPREL16_DS:
10439 case R_PPC64_TPREL16_LO_DS:
10440 case R_PPC64_TPREL16_HIGHER:
10441 case R_PPC64_TPREL16_HIGHERA:
10442 case R_PPC64_TPREL16_HIGHEST:
10443 case R_PPC64_TPREL16_HIGHESTA:
10444 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10445 if (info->shared)
10446 /* The TPREL16 relocs shouldn't really be used in shared
10447 libs as they will result in DT_TEXTREL being set, but
10448 support them anyway. */
10449 goto dodyn;
10450 break;
10451
10452 case R_PPC64_DTPREL16:
10453 case R_PPC64_DTPREL16_LO:
10454 case R_PPC64_DTPREL16_HI:
10455 case R_PPC64_DTPREL16_HA:
10456 case R_PPC64_DTPREL16_DS:
10457 case R_PPC64_DTPREL16_LO_DS:
10458 case R_PPC64_DTPREL16_HIGHER:
10459 case R_PPC64_DTPREL16_HIGHERA:
10460 case R_PPC64_DTPREL16_HIGHEST:
10461 case R_PPC64_DTPREL16_HIGHESTA:
10462 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10463 break;
10464
10465 case R_PPC64_DTPMOD64:
10466 relocation = 1;
10467 addend = 0;
10468 goto dodyn;
10469
10470 case R_PPC64_TPREL64:
10471 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10472 goto dodyn;
10473
10474 case R_PPC64_DTPREL64:
10475 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10476 /* Fall thru */
10477
10478 /* Relocations that may need to be propagated if this is a
10479 dynamic object. */
10480 case R_PPC64_REL30:
10481 case R_PPC64_REL32:
10482 case R_PPC64_REL64:
10483 case R_PPC64_ADDR14:
10484 case R_PPC64_ADDR14_BRNTAKEN:
10485 case R_PPC64_ADDR14_BRTAKEN:
10486 case R_PPC64_ADDR16:
10487 case R_PPC64_ADDR16_DS:
10488 case R_PPC64_ADDR16_HA:
10489 case R_PPC64_ADDR16_HI:
10490 case R_PPC64_ADDR16_HIGHER:
10491 case R_PPC64_ADDR16_HIGHERA:
10492 case R_PPC64_ADDR16_HIGHEST:
10493 case R_PPC64_ADDR16_HIGHESTA:
10494 case R_PPC64_ADDR16_LO:
10495 case R_PPC64_ADDR16_LO_DS:
10496 case R_PPC64_ADDR24:
10497 case R_PPC64_ADDR32:
10498 case R_PPC64_ADDR64:
10499 case R_PPC64_UADDR16:
10500 case R_PPC64_UADDR32:
10501 case R_PPC64_UADDR64:
10502 /* r_symndx will be zero only for relocs against symbols
10503 from removed linkonce sections, or sections discarded by
10504 a linker script. */
10505 dodyn:
10506 if (r_symndx == 0)
10507 break;
10508 /* Fall thru. */
10509
10510 dodyn2:
10511 if ((input_section->flags & SEC_ALLOC) == 0)
10512 break;
10513
10514 if (NO_OPD_RELOCS && is_opd)
10515 break;
10516
10517 if ((info->shared
10518 && (h == NULL
10519 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10520 || h->elf.root.type != bfd_link_hash_undefweak)
10521 && (MUST_BE_DYN_RELOC (r_type)
10522 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10523 || (ELIMINATE_COPY_RELOCS
10524 && !info->shared
10525 && h != NULL
10526 && h->elf.dynindx != -1
10527 && !h->elf.non_got_ref
10528 && h->elf.def_dynamic
10529 && !h->elf.def_regular))
10530 {
10531 Elf_Internal_Rela outrel;
10532 bfd_boolean skip, relocate;
10533 asection *sreloc;
10534 bfd_byte *loc;
10535 bfd_vma out_off;
10536
10537 /* When generating a dynamic object, these relocations
10538 are copied into the output file to be resolved at run
10539 time. */
10540
10541 skip = FALSE;
10542 relocate = FALSE;
10543
10544 out_off = _bfd_elf_section_offset (output_bfd, info,
10545 input_section, rel->r_offset);
10546 if (out_off == (bfd_vma) -1)
10547 skip = TRUE;
10548 else if (out_off == (bfd_vma) -2)
10549 skip = TRUE, relocate = TRUE;
10550 out_off += (input_section->output_section->vma
10551 + input_section->output_offset);
10552 outrel.r_offset = out_off;
10553 outrel.r_addend = rel->r_addend;
10554
10555 /* Optimize unaligned reloc use. */
10556 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10557 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10558 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10559 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10560 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10561 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10562 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10563 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10564 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10565
10566 if (skip)
10567 memset (&outrel, 0, sizeof outrel);
10568 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10569 && !is_opd
10570 && r_type != R_PPC64_TOC)
10571 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10572 else
10573 {
10574 /* This symbol is local, or marked to become local,
10575 or this is an opd section reloc which must point
10576 at a local function. */
10577 outrel.r_addend += relocation;
10578 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10579 {
10580 if (is_opd && h != NULL)
10581 {
10582 /* Lie about opd entries. This case occurs
10583 when building shared libraries and we
10584 reference a function in another shared
10585 lib. The same thing happens for a weak
10586 definition in an application that's
10587 overridden by a strong definition in a
10588 shared lib. (I believe this is a generic
10589 bug in binutils handling of weak syms.)
10590 In these cases we won't use the opd
10591 entry in this lib. */
10592 unresolved_reloc = FALSE;
10593 }
10594 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10595
10596 /* We need to relocate .opd contents for ld.so.
10597 Prelink also wants simple and consistent rules
10598 for relocs. This make all RELATIVE relocs have
10599 *r_offset equal to r_addend. */
10600 relocate = TRUE;
10601 }
10602 else
10603 {
10604 long indx = 0;
10605
10606 if (bfd_is_abs_section (sec))
10607 ;
10608 else if (sec == NULL || sec->owner == NULL)
10609 {
10610 bfd_set_error (bfd_error_bad_value);
10611 return FALSE;
10612 }
10613 else
10614 {
10615 asection *osec;
10616
10617 osec = sec->output_section;
10618 indx = elf_section_data (osec)->dynindx;
10619
10620 /* We are turning this relocation into one
10621 against a section symbol, so subtract out
10622 the output section's address but not the
10623 offset of the input section in the output
10624 section. */
10625 outrel.r_addend -= osec->vma;
10626 }
10627
10628 outrel.r_info = ELF64_R_INFO (indx, r_type);
10629 }
10630 }
10631
10632 sreloc = elf_section_data (input_section)->sreloc;
10633 if (sreloc == NULL)
10634 abort ();
10635
10636 loc = sreloc->contents;
10637 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10638 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10639
10640 /* If this reloc is against an external symbol, it will
10641 be computed at runtime, so there's no need to do
10642 anything now. However, for the sake of prelink ensure
10643 that the section contents are a known value. */
10644 if (! relocate)
10645 {
10646 unresolved_reloc = FALSE;
10647 /* The value chosen here is quite arbitrary as ld.so
10648 ignores section contents except for the special
10649 case of .opd where the contents might be accessed
10650 before relocation. Choose zero, as that won't
10651 cause reloc overflow. */
10652 relocation = 0;
10653 addend = 0;
10654 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10655 to improve backward compatibility with older
10656 versions of ld. */
10657 if (r_type == R_PPC64_ADDR64)
10658 addend = outrel.r_addend;
10659 /* Adjust pc_relative relocs to have zero in *r_offset. */
10660 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10661 addend = (input_section->output_section->vma
10662 + input_section->output_offset
10663 + rel->r_offset);
10664 }
10665 }
10666 break;
10667
10668 case R_PPC64_COPY:
10669 case R_PPC64_GLOB_DAT:
10670 case R_PPC64_JMP_SLOT:
10671 case R_PPC64_RELATIVE:
10672 /* We shouldn't ever see these dynamic relocs in relocatable
10673 files. */
10674 /* Fall through. */
10675
10676 case R_PPC64_PLTGOT16:
10677 case R_PPC64_PLTGOT16_DS:
10678 case R_PPC64_PLTGOT16_HA:
10679 case R_PPC64_PLTGOT16_HI:
10680 case R_PPC64_PLTGOT16_LO:
10681 case R_PPC64_PLTGOT16_LO_DS:
10682 case R_PPC64_PLTREL32:
10683 case R_PPC64_PLTREL64:
10684 /* These ones haven't been implemented yet. */
10685
10686 (*_bfd_error_handler)
10687 (_("%B: relocation %s is not supported for symbol %s."),
10688 input_bfd,
10689 ppc64_elf_howto_table[r_type]->name, sym_name);
10690
10691 bfd_set_error (bfd_error_invalid_operation);
10692 ret = FALSE;
10693 continue;
10694 }
10695
10696 /* Do any further special processing. */
10697 switch (r_type)
10698 {
10699 default:
10700 break;
10701
10702 case R_PPC64_ADDR16_HA:
10703 case R_PPC64_ADDR16_HIGHERA:
10704 case R_PPC64_ADDR16_HIGHESTA:
10705 case R_PPC64_GOT16_HA:
10706 case R_PPC64_PLTGOT16_HA:
10707 case R_PPC64_PLT16_HA:
10708 case R_PPC64_TOC16_HA:
10709 case R_PPC64_SECTOFF_HA:
10710 case R_PPC64_TPREL16_HA:
10711 case R_PPC64_DTPREL16_HA:
10712 case R_PPC64_GOT_TLSGD16_HA:
10713 case R_PPC64_GOT_TLSLD16_HA:
10714 case R_PPC64_GOT_TPREL16_HA:
10715 case R_PPC64_GOT_DTPREL16_HA:
10716 case R_PPC64_TPREL16_HIGHER:
10717 case R_PPC64_TPREL16_HIGHERA:
10718 case R_PPC64_TPREL16_HIGHEST:
10719 case R_PPC64_TPREL16_HIGHESTA:
10720 case R_PPC64_DTPREL16_HIGHER:
10721 case R_PPC64_DTPREL16_HIGHERA:
10722 case R_PPC64_DTPREL16_HIGHEST:
10723 case R_PPC64_DTPREL16_HIGHESTA:
10724 /* It's just possible that this symbol is a weak symbol
10725 that's not actually defined anywhere. In that case,
10726 'sec' would be NULL, and we should leave the symbol
10727 alone (it will be set to zero elsewhere in the link). */
10728 if (sec != NULL)
10729 /* Add 0x10000 if sign bit in 0:15 is set.
10730 Bits 0:15 are not used. */
10731 addend += 0x8000;
10732 break;
10733
10734 case R_PPC64_ADDR16_DS:
10735 case R_PPC64_ADDR16_LO_DS:
10736 case R_PPC64_GOT16_DS:
10737 case R_PPC64_GOT16_LO_DS:
10738 case R_PPC64_PLT16_LO_DS:
10739 case R_PPC64_SECTOFF_DS:
10740 case R_PPC64_SECTOFF_LO_DS:
10741 case R_PPC64_TOC16_DS:
10742 case R_PPC64_TOC16_LO_DS:
10743 case R_PPC64_PLTGOT16_DS:
10744 case R_PPC64_PLTGOT16_LO_DS:
10745 case R_PPC64_GOT_TPREL16_DS:
10746 case R_PPC64_GOT_TPREL16_LO_DS:
10747 case R_PPC64_GOT_DTPREL16_DS:
10748 case R_PPC64_GOT_DTPREL16_LO_DS:
10749 case R_PPC64_TPREL16_DS:
10750 case R_PPC64_TPREL16_LO_DS:
10751 case R_PPC64_DTPREL16_DS:
10752 case R_PPC64_DTPREL16_LO_DS:
10753 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10754 mask = 3;
10755 /* If this reloc is against an lq insn, then the value must be
10756 a multiple of 16. This is somewhat of a hack, but the
10757 "correct" way to do this by defining _DQ forms of all the
10758 _DS relocs bloats all reloc switches in this file. It
10759 doesn't seem to make much sense to use any of these relocs
10760 in data, so testing the insn should be safe. */
10761 if ((insn & (0x3f << 26)) == (56u << 26))
10762 mask = 15;
10763 if (((relocation + addend) & mask) != 0)
10764 {
10765 (*_bfd_error_handler)
10766 (_("%B: error: relocation %s not a multiple of %d"),
10767 input_bfd,
10768 ppc64_elf_howto_table[r_type]->name,
10769 mask + 1);
10770 bfd_set_error (bfd_error_bad_value);
10771 ret = FALSE;
10772 continue;
10773 }
10774 break;
10775 }
10776
10777 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10778 because such sections are not SEC_ALLOC and thus ld.so will
10779 not process them. */
10780 if (unresolved_reloc
10781 && !((input_section->flags & SEC_DEBUGGING) != 0
10782 && h->elf.def_dynamic))
10783 {
10784 (*_bfd_error_handler)
10785 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10786 input_bfd,
10787 input_section,
10788 (long) rel->r_offset,
10789 ppc64_elf_howto_table[(int) r_type]->name,
10790 h->elf.root.root.string);
10791 ret = FALSE;
10792 }
10793
10794 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10795 input_bfd,
10796 input_section,
10797 contents,
10798 rel->r_offset,
10799 relocation,
10800 addend);
10801
10802 if (r != bfd_reloc_ok)
10803 {
10804 if (sym_name == NULL)
10805 sym_name = "(null)";
10806 if (r == bfd_reloc_overflow)
10807 {
10808 if (warned)
10809 continue;
10810 if (h != NULL
10811 && h->elf.root.type == bfd_link_hash_undefweak
10812 && ppc64_elf_howto_table[r_type]->pc_relative)
10813 {
10814 /* Assume this is a call protected by other code that
10815 detects the symbol is undefined. If this is the case,
10816 we can safely ignore the overflow. If not, the
10817 program is hosed anyway, and a little warning isn't
10818 going to help. */
10819
10820 continue;
10821 }
10822
10823 if (!((*info->callbacks->reloc_overflow)
10824 (info, (h ? &h->elf.root : NULL), sym_name,
10825 ppc64_elf_howto_table[r_type]->name,
10826 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10827 return FALSE;
10828 }
10829 else
10830 {
10831 (*_bfd_error_handler)
10832 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10833 input_bfd,
10834 input_section,
10835 (long) rel->r_offset,
10836 ppc64_elf_howto_table[r_type]->name,
10837 sym_name,
10838 (int) r);
10839 ret = FALSE;
10840 }
10841 }
10842 }
10843
10844 /* If we're emitting relocations, then shortly after this function
10845 returns, reloc offsets and addends for this section will be
10846 adjusted. Worse, reloc symbol indices will be for the output
10847 file rather than the input. Save a copy of the relocs for
10848 opd_entry_value. */
10849 if (is_opd && info->emitrelocations)
10850 {
10851 bfd_size_type amt;
10852 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10853 rel = bfd_alloc (input_bfd, amt);
10854 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10855 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10856 if (rel == NULL)
10857 return FALSE;
10858 memcpy (rel, relocs, amt);
10859 }
10860 return ret;
10861 }
10862
10863 /* Adjust the value of any local symbols in opd sections. */
10864
10865 static bfd_boolean
10866 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10867 const char *name ATTRIBUTE_UNUSED,
10868 Elf_Internal_Sym *elfsym,
10869 asection *input_sec,
10870 struct elf_link_hash_entry *h)
10871 {
10872 long *opd_adjust, adjust;
10873 bfd_vma value;
10874
10875 if (h != NULL)
10876 return TRUE;
10877
10878 opd_adjust = get_opd_info (input_sec);
10879 if (opd_adjust == NULL)
10880 return TRUE;
10881
10882 value = elfsym->st_value - input_sec->output_offset;
10883 if (!info->relocatable)
10884 value -= input_sec->output_section->vma;
10885
10886 adjust = opd_adjust[value / 8];
10887 if (adjust == -1)
10888 elfsym->st_value = 0;
10889 else
10890 elfsym->st_value += adjust;
10891 return TRUE;
10892 }
10893
10894 /* Finish up dynamic symbol handling. We set the contents of various
10895 dynamic sections here. */
10896
10897 static bfd_boolean
10898 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10899 struct bfd_link_info *info,
10900 struct elf_link_hash_entry *h,
10901 Elf_Internal_Sym *sym)
10902 {
10903 struct ppc_link_hash_table *htab;
10904 bfd *dynobj;
10905 struct plt_entry *ent;
10906 Elf_Internal_Rela rela;
10907 bfd_byte *loc;
10908
10909 htab = ppc_hash_table (info);
10910 dynobj = htab->elf.dynobj;
10911
10912 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10913 if (ent->plt.offset != (bfd_vma) -1)
10914 {
10915 /* This symbol has an entry in the procedure linkage
10916 table. Set it up. */
10917
10918 if (htab->plt == NULL
10919 || htab->relplt == NULL
10920 || htab->glink == NULL)
10921 abort ();
10922
10923 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10924 fill in the PLT entry. */
10925 rela.r_offset = (htab->plt->output_section->vma
10926 + htab->plt->output_offset
10927 + ent->plt.offset);
10928 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10929 rela.r_addend = ent->addend;
10930
10931 loc = htab->relplt->contents;
10932 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10933 * sizeof (Elf64_External_Rela));
10934 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10935 }
10936
10937 if (h->needs_copy)
10938 {
10939 Elf_Internal_Rela rela;
10940 bfd_byte *loc;
10941
10942 /* This symbol needs a copy reloc. Set it up. */
10943
10944 if (h->dynindx == -1
10945 || (h->root.type != bfd_link_hash_defined
10946 && h->root.type != bfd_link_hash_defweak)
10947 || htab->relbss == NULL)
10948 abort ();
10949
10950 rela.r_offset = (h->root.u.def.value
10951 + h->root.u.def.section->output_section->vma
10952 + h->root.u.def.section->output_offset);
10953 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10954 rela.r_addend = 0;
10955 loc = htab->relbss->contents;
10956 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10957 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10958 }
10959
10960 /* Mark some specially defined symbols as absolute. */
10961 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10962 sym->st_shndx = SHN_ABS;
10963
10964 return TRUE;
10965 }
10966
10967 /* Used to decide how to sort relocs in an optimal manner for the
10968 dynamic linker, before writing them out. */
10969
10970 static enum elf_reloc_type_class
10971 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10972 {
10973 enum elf_ppc64_reloc_type r_type;
10974
10975 r_type = ELF64_R_TYPE (rela->r_info);
10976 switch (r_type)
10977 {
10978 case R_PPC64_RELATIVE:
10979 return reloc_class_relative;
10980 case R_PPC64_JMP_SLOT:
10981 return reloc_class_plt;
10982 case R_PPC64_COPY:
10983 return reloc_class_copy;
10984 default:
10985 return reloc_class_normal;
10986 }
10987 }
10988
10989 /* Finish up the dynamic sections. */
10990
10991 static bfd_boolean
10992 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10993 struct bfd_link_info *info)
10994 {
10995 struct ppc_link_hash_table *htab;
10996 bfd *dynobj;
10997 asection *sdyn;
10998
10999 htab = ppc_hash_table (info);
11000 dynobj = htab->elf.dynobj;
11001 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11002
11003 if (htab->elf.dynamic_sections_created)
11004 {
11005 Elf64_External_Dyn *dyncon, *dynconend;
11006
11007 if (sdyn == NULL || htab->got == NULL)
11008 abort ();
11009
11010 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11011 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11012 for (; dyncon < dynconend; dyncon++)
11013 {
11014 Elf_Internal_Dyn dyn;
11015 asection *s;
11016
11017 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11018
11019 switch (dyn.d_tag)
11020 {
11021 default:
11022 continue;
11023
11024 case DT_PPC64_GLINK:
11025 s = htab->glink;
11026 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11027 /* We stupidly defined DT_PPC64_GLINK to be the start
11028 of glink rather than the first entry point, which is
11029 what ld.so needs, and now have a bigger stub to
11030 support automatic multiple TOCs. */
11031 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11032 break;
11033
11034 case DT_PPC64_OPD:
11035 s = bfd_get_section_by_name (output_bfd, ".opd");
11036 if (s == NULL)
11037 continue;
11038 dyn.d_un.d_ptr = s->vma;
11039 break;
11040
11041 case DT_PPC64_OPDSZ:
11042 s = bfd_get_section_by_name (output_bfd, ".opd");
11043 if (s == NULL)
11044 continue;
11045 dyn.d_un.d_val = s->size;
11046 break;
11047
11048 case DT_PLTGOT:
11049 s = htab->plt;
11050 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11051 break;
11052
11053 case DT_JMPREL:
11054 s = htab->relplt;
11055 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11056 break;
11057
11058 case DT_PLTRELSZ:
11059 dyn.d_un.d_val = htab->relplt->size;
11060 break;
11061
11062 case DT_RELASZ:
11063 /* Don't count procedure linkage table relocs in the
11064 overall reloc count. */
11065 s = htab->relplt;
11066 if (s == NULL)
11067 continue;
11068 dyn.d_un.d_val -= s->size;
11069 break;
11070
11071 case DT_RELA:
11072 /* We may not be using the standard ELF linker script.
11073 If .rela.plt is the first .rela section, we adjust
11074 DT_RELA to not include it. */
11075 s = htab->relplt;
11076 if (s == NULL)
11077 continue;
11078 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11079 continue;
11080 dyn.d_un.d_ptr += s->size;
11081 break;
11082 }
11083
11084 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11085 }
11086 }
11087
11088 if (htab->got != NULL && htab->got->size != 0)
11089 {
11090 /* Fill in the first entry in the global offset table.
11091 We use it to hold the link-time TOCbase. */
11092 bfd_put_64 (output_bfd,
11093 elf_gp (output_bfd) + TOC_BASE_OFF,
11094 htab->got->contents);
11095
11096 /* Set .got entry size. */
11097 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11098 }
11099
11100 if (htab->plt != NULL && htab->plt->size != 0)
11101 {
11102 /* Set .plt entry size. */
11103 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11104 = PLT_ENTRY_SIZE;
11105 }
11106
11107 /* We need to handle writing out multiple GOT sections ourselves,
11108 since we didn't add them to DYNOBJ. We know dynobj is the first
11109 bfd. */
11110 while ((dynobj = dynobj->link_next) != NULL)
11111 {
11112 asection *s;
11113
11114 if (!is_ppc64_elf_target (dynobj->xvec))
11115 continue;
11116
11117 s = ppc64_elf_tdata (dynobj)->got;
11118 if (s != NULL
11119 && s->size != 0
11120 && s->output_section != bfd_abs_section_ptr
11121 && !bfd_set_section_contents (output_bfd, s->output_section,
11122 s->contents, s->output_offset,
11123 s->size))
11124 return FALSE;
11125 s = ppc64_elf_tdata (dynobj)->relgot;
11126 if (s != NULL
11127 && s->size != 0
11128 && s->output_section != bfd_abs_section_ptr
11129 && !bfd_set_section_contents (output_bfd, s->output_section,
11130 s->contents, s->output_offset,
11131 s->size))
11132 return FALSE;
11133 }
11134
11135 return TRUE;
11136 }
11137
11138 #include "elf64-target.h"
GDB Binutils - Deliverables
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