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* elf64-ppc.c (ppc_build_one_stub): Replace assertion that long
[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 if (type >= (sizeof (ppc64_elf_howto_table)
2121 / sizeof (ppc64_elf_howto_table[0])))
2122 {
2123 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2124 abfd, (int) type);
2125 type = R_PPC64_NONE;
2126 }
2127 cache_ptr->howto = ppc64_elf_howto_table[type];
2128 }
2129
2130 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2131
2132 static bfd_reloc_status_type
2133 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2134 void *data, asection *input_section,
2135 bfd *output_bfd, char **error_message)
2136 {
2137 /* If this is a relocatable link (output_bfd test tells us), just
2138 call the generic function. Any adjustment will be done at final
2139 link time. */
2140 if (output_bfd != NULL)
2141 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2142 input_section, output_bfd, error_message);
2143
2144 /* Adjust the addend for sign extension of the low 16 bits.
2145 We won't actually be using the low 16 bits, so trashing them
2146 doesn't matter. */
2147 reloc_entry->addend += 0x8000;
2148 return bfd_reloc_continue;
2149 }
2150
2151 static bfd_reloc_status_type
2152 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2153 void *data, asection *input_section,
2154 bfd *output_bfd, char **error_message)
2155 {
2156 if (output_bfd != NULL)
2157 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2158 input_section, output_bfd, error_message);
2159
2160 if (strcmp (symbol->section->name, ".opd") == 0
2161 && (symbol->section->owner->flags & DYNAMIC) == 0)
2162 {
2163 bfd_vma dest = opd_entry_value (symbol->section,
2164 symbol->value + reloc_entry->addend,
2165 NULL, NULL);
2166 if (dest != (bfd_vma) -1)
2167 reloc_entry->addend = dest - (symbol->value
2168 + symbol->section->output_section->vma
2169 + symbol->section->output_offset);
2170 }
2171 return bfd_reloc_continue;
2172 }
2173
2174 static bfd_reloc_status_type
2175 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2176 void *data, asection *input_section,
2177 bfd *output_bfd, char **error_message)
2178 {
2179 long insn;
2180 enum elf_ppc64_reloc_type r_type;
2181 bfd_size_type octets;
2182 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2183 bfd_boolean is_power4 = FALSE;
2184
2185 /* If this is a relocatable link (output_bfd test tells us), just
2186 call the generic function. Any adjustment will be done at final
2187 link time. */
2188 if (output_bfd != NULL)
2189 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2190 input_section, output_bfd, error_message);
2191
2192 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2193 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2194 insn &= ~(0x01 << 21);
2195 r_type = reloc_entry->howto->type;
2196 if (r_type == R_PPC64_ADDR14_BRTAKEN
2197 || r_type == R_PPC64_REL14_BRTAKEN)
2198 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2199
2200 if (is_power4)
2201 {
2202 /* Set 'a' bit. This is 0b00010 in BO field for branch
2203 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2204 for branch on CTR insns (BO == 1a00t or 1a01t). */
2205 if ((insn & (0x14 << 21)) == (0x04 << 21))
2206 insn |= 0x02 << 21;
2207 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2208 insn |= 0x08 << 21;
2209 else
2210 goto out;
2211 }
2212 else
2213 {
2214 bfd_vma target = 0;
2215 bfd_vma from;
2216
2217 if (!bfd_is_com_section (symbol->section))
2218 target = symbol->value;
2219 target += symbol->section->output_section->vma;
2220 target += symbol->section->output_offset;
2221 target += reloc_entry->addend;
2222
2223 from = (reloc_entry->address
2224 + input_section->output_offset
2225 + input_section->output_section->vma);
2226
2227 /* Invert 'y' bit if not the default. */
2228 if ((bfd_signed_vma) (target - from) < 0)
2229 insn ^= 0x01 << 21;
2230 }
2231 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2232 out:
2233 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2234 input_section, output_bfd, error_message);
2235 }
2236
2237 static bfd_reloc_status_type
2238 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2239 void *data, asection *input_section,
2240 bfd *output_bfd, char **error_message)
2241 {
2242 /* If this is a relocatable link (output_bfd test tells us), just
2243 call the generic function. Any adjustment will be done at final
2244 link time. */
2245 if (output_bfd != NULL)
2246 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2247 input_section, output_bfd, error_message);
2248
2249 /* Subtract the symbol section base address. */
2250 reloc_entry->addend -= symbol->section->output_section->vma;
2251 return bfd_reloc_continue;
2252 }
2253
2254 static bfd_reloc_status_type
2255 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2256 void *data, asection *input_section,
2257 bfd *output_bfd, char **error_message)
2258 {
2259 /* If this is a relocatable link (output_bfd test tells us), just
2260 call the generic function. Any adjustment will be done at final
2261 link time. */
2262 if (output_bfd != NULL)
2263 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2264 input_section, output_bfd, error_message);
2265
2266 /* Subtract the symbol section base address. */
2267 reloc_entry->addend -= symbol->section->output_section->vma;
2268
2269 /* Adjust the addend for sign extension of the low 16 bits. */
2270 reloc_entry->addend += 0x8000;
2271 return bfd_reloc_continue;
2272 }
2273
2274 static bfd_reloc_status_type
2275 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2276 void *data, asection *input_section,
2277 bfd *output_bfd, char **error_message)
2278 {
2279 bfd_vma TOCstart;
2280
2281 /* If this is a relocatable link (output_bfd test tells us), just
2282 call the generic function. Any adjustment will be done at final
2283 link time. */
2284 if (output_bfd != NULL)
2285 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2286 input_section, output_bfd, error_message);
2287
2288 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2289 if (TOCstart == 0)
2290 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2291
2292 /* Subtract the TOC base address. */
2293 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2294 return bfd_reloc_continue;
2295 }
2296
2297 static bfd_reloc_status_type
2298 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2299 void *data, asection *input_section,
2300 bfd *output_bfd, char **error_message)
2301 {
2302 bfd_vma TOCstart;
2303
2304 /* If this is a relocatable link (output_bfd test tells us), just
2305 call the generic function. Any adjustment will be done at final
2306 link time. */
2307 if (output_bfd != NULL)
2308 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2309 input_section, output_bfd, error_message);
2310
2311 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2312 if (TOCstart == 0)
2313 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2314
2315 /* Subtract the TOC base address. */
2316 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2317
2318 /* Adjust the addend for sign extension of the low 16 bits. */
2319 reloc_entry->addend += 0x8000;
2320 return bfd_reloc_continue;
2321 }
2322
2323 static bfd_reloc_status_type
2324 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2325 void *data, asection *input_section,
2326 bfd *output_bfd, char **error_message)
2327 {
2328 bfd_vma TOCstart;
2329 bfd_size_type octets;
2330
2331 /* If this is a relocatable link (output_bfd test tells us), just
2332 call the generic function. Any adjustment will be done at final
2333 link time. */
2334 if (output_bfd != NULL)
2335 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2336 input_section, output_bfd, error_message);
2337
2338 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2339 if (TOCstart == 0)
2340 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2341
2342 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2343 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2344 return bfd_reloc_ok;
2345 }
2346
2347 static bfd_reloc_status_type
2348 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2349 void *data, asection *input_section,
2350 bfd *output_bfd, char **error_message)
2351 {
2352 /* If this is a relocatable link (output_bfd test tells us), just
2353 call the generic function. Any adjustment will be done at final
2354 link time. */
2355 if (output_bfd != NULL)
2356 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2357 input_section, output_bfd, error_message);
2358
2359 if (error_message != NULL)
2360 {
2361 static char buf[60];
2362 sprintf (buf, "generic linker can't handle %s",
2363 reloc_entry->howto->name);
2364 *error_message = buf;
2365 }
2366 return bfd_reloc_dangerous;
2367 }
2368
2369 struct ppc64_elf_obj_tdata
2370 {
2371 struct elf_obj_tdata elf;
2372
2373 /* Shortcuts to dynamic linker sections. */
2374 asection *got;
2375 asection *relgot;
2376
2377 union {
2378 /* Used during garbage collection. We attach global symbols defined
2379 on removed .opd entries to this section so that the sym is removed. */
2380 asection *deleted_section;
2381
2382 /* Used when adding symbols. */
2383 bfd_boolean has_dotsym;
2384 } u;
2385
2386 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2387 sections means we potentially need one of these for each input bfd. */
2388 union {
2389 bfd_signed_vma refcount;
2390 bfd_vma offset;
2391 } tlsld_got;
2392
2393 /* A copy of relocs before they are modified for --emit-relocs. */
2394 Elf_Internal_Rela *opd_relocs;
2395 };
2396
2397 #define ppc64_elf_tdata(bfd) \
2398 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2399
2400 #define ppc64_tlsld_got(bfd) \
2401 (&ppc64_elf_tdata (bfd)->tlsld_got)
2402
2403 /* Override the generic function because we store some extras. */
2404
2405 static bfd_boolean
2406 ppc64_elf_mkobject (bfd *abfd)
2407 {
2408 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2409 abfd->tdata.any = bfd_zalloc (abfd, amt);
2410 if (abfd->tdata.any == NULL)
2411 return FALSE;
2412 return TRUE;
2413 }
2414
2415 /* Return 1 if target is one of ours. */
2416
2417 static bfd_boolean
2418 is_ppc64_elf_target (const struct bfd_target *targ)
2419 {
2420 extern const bfd_target bfd_elf64_powerpc_vec;
2421 extern const bfd_target bfd_elf64_powerpcle_vec;
2422
2423 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2424 }
2425
2426 /* Fix bad default arch selected for a 64 bit input bfd when the
2427 default is 32 bit. */
2428
2429 static bfd_boolean
2430 ppc64_elf_object_p (bfd *abfd)
2431 {
2432 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2433 {
2434 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2435
2436 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2437 {
2438 /* Relies on arch after 32 bit default being 64 bit default. */
2439 abfd->arch_info = abfd->arch_info->next;
2440 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2441 }
2442 }
2443 return TRUE;
2444 }
2445
2446 /* Support for core dump NOTE sections. */
2447
2448 static bfd_boolean
2449 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2450 {
2451 size_t offset, size;
2452
2453 if (note->descsz != 504)
2454 return FALSE;
2455
2456 /* pr_cursig */
2457 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2458
2459 /* pr_pid */
2460 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2461
2462 /* pr_reg */
2463 offset = 112;
2464 size = 384;
2465
2466 /* Make a ".reg/999" section. */
2467 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2468 size, note->descpos + offset);
2469 }
2470
2471 static bfd_boolean
2472 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2473 {
2474 if (note->descsz != 136)
2475 return FALSE;
2476
2477 elf_tdata (abfd)->core_program
2478 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2479 elf_tdata (abfd)->core_command
2480 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2481
2482 return TRUE;
2483 }
2484
2485 /* Merge backend specific data from an object file to the output
2486 object file when linking. */
2487
2488 static bfd_boolean
2489 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2490 {
2491 /* Check if we have the same endianess. */
2492 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2493 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2494 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2495 {
2496 const char *msg;
2497
2498 if (bfd_big_endian (ibfd))
2499 msg = _("%B: compiled for a big endian system "
2500 "and target is little endian");
2501 else
2502 msg = _("%B: compiled for a little endian system "
2503 "and target is big endian");
2504
2505 (*_bfd_error_handler) (msg, ibfd);
2506
2507 bfd_set_error (bfd_error_wrong_format);
2508 return FALSE;
2509 }
2510
2511 return TRUE;
2512 }
2513
2514 /* Add extra PPC sections. */
2515
2516 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2517 {
2518 { ".plt", 4, 0, SHT_NOBITS, 0 },
2519 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2520 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2521 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2522 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2523 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2524 { NULL, 0, 0, 0, 0 }
2525 };
2526
2527 struct _ppc64_elf_section_data
2528 {
2529 struct bfd_elf_section_data elf;
2530
2531 /* An array with one entry for each opd function descriptor. */
2532 union
2533 {
2534 /* Points to the function code section for local opd entries. */
2535 asection **func_sec;
2536 /* After editing .opd, adjust references to opd local syms. */
2537 long *adjust;
2538 } opd;
2539
2540 /* An array for toc sections, indexed by offset/8.
2541 Specifies the relocation symbol index used at a given toc offset. */
2542 unsigned *t_symndx;
2543 };
2544
2545 #define ppc64_elf_section_data(sec) \
2546 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2547
2548 static bfd_boolean
2549 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2550 {
2551 struct _ppc64_elf_section_data *sdata;
2552 bfd_size_type amt = sizeof (*sdata);
2553
2554 sdata = bfd_zalloc (abfd, amt);
2555 if (sdata == NULL)
2556 return FALSE;
2557 sec->used_by_bfd = sdata;
2558
2559 return _bfd_elf_new_section_hook (abfd, sec);
2560 }
2561
2562 static void *
2563 get_opd_info (asection * sec)
2564 {
2565 if (sec != NULL
2566 && ppc64_elf_section_data (sec) != NULL
2567 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2568 return ppc64_elf_section_data (sec)->opd.adjust;
2569 return NULL;
2570 }
2571 \f
2572 /* Parameters for the qsort hook. */
2573 static asection *synthetic_opd;
2574 static bfd_boolean synthetic_relocatable;
2575
2576 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2577
2578 static int
2579 compare_symbols (const void *ap, const void *bp)
2580 {
2581 const asymbol *a = * (const asymbol **) ap;
2582 const asymbol *b = * (const asymbol **) bp;
2583
2584 /* Section symbols first. */
2585 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2586 return -1;
2587 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2588 return 1;
2589
2590 /* then .opd symbols. */
2591 if (a->section == synthetic_opd && b->section != synthetic_opd)
2592 return -1;
2593 if (a->section != synthetic_opd && b->section == synthetic_opd)
2594 return 1;
2595
2596 /* then other code symbols. */
2597 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2598 == (SEC_CODE | SEC_ALLOC)
2599 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2600 != (SEC_CODE | SEC_ALLOC))
2601 return -1;
2602
2603 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2604 != (SEC_CODE | SEC_ALLOC)
2605 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2606 == (SEC_CODE | SEC_ALLOC))
2607 return 1;
2608
2609 if (synthetic_relocatable)
2610 {
2611 if (a->section->id < b->section->id)
2612 return -1;
2613
2614 if (a->section->id > b->section->id)
2615 return 1;
2616 }
2617
2618 if (a->value + a->section->vma < b->value + b->section->vma)
2619 return -1;
2620
2621 if (a->value + a->section->vma > b->value + b->section->vma)
2622 return 1;
2623
2624 return 0;
2625 }
2626
2627 /* Search SYMS for a symbol of the given VALUE. */
2628
2629 static asymbol *
2630 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2631 {
2632 long mid;
2633
2634 if (id == -1)
2635 {
2636 while (lo < hi)
2637 {
2638 mid = (lo + hi) >> 1;
2639 if (syms[mid]->value + syms[mid]->section->vma < value)
2640 lo = mid + 1;
2641 else if (syms[mid]->value + syms[mid]->section->vma > value)
2642 hi = mid;
2643 else
2644 return syms[mid];
2645 }
2646 }
2647 else
2648 {
2649 while (lo < hi)
2650 {
2651 mid = (lo + hi) >> 1;
2652 if (syms[mid]->section->id < id)
2653 lo = mid + 1;
2654 else if (syms[mid]->section->id > id)
2655 hi = mid;
2656 else if (syms[mid]->value < value)
2657 lo = mid + 1;
2658 else if (syms[mid]->value > value)
2659 hi = mid;
2660 else
2661 return syms[mid];
2662 }
2663 }
2664 return NULL;
2665 }
2666
2667 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2668 entry syms. */
2669
2670 static long
2671 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2672 long static_count, asymbol **static_syms,
2673 long dyn_count, asymbol **dyn_syms,
2674 asymbol **ret)
2675 {
2676 asymbol *s;
2677 long i;
2678 long count;
2679 char *names;
2680 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2681 asection *opd;
2682 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2683 asymbol **syms;
2684
2685 *ret = NULL;
2686
2687 opd = bfd_get_section_by_name (abfd, ".opd");
2688 if (opd == NULL)
2689 return 0;
2690
2691 symcount = static_count;
2692 if (!relocatable)
2693 symcount += dyn_count;
2694 if (symcount == 0)
2695 return 0;
2696
2697 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2698 if (syms == NULL)
2699 return -1;
2700
2701 if (!relocatable && static_count != 0 && dyn_count != 0)
2702 {
2703 /* Use both symbol tables. */
2704 memcpy (syms, static_syms, static_count * sizeof (*syms));
2705 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2706 }
2707 else if (!relocatable && static_count == 0)
2708 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2709 else
2710 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2711
2712 synthetic_opd = opd;
2713 synthetic_relocatable = relocatable;
2714 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2715
2716 if (!relocatable && symcount > 1)
2717 {
2718 long j;
2719 /* Trim duplicate syms, since we may have merged the normal and
2720 dynamic symbols. Actually, we only care about syms that have
2721 different values, so trim any with the same value. */
2722 for (i = 1, j = 1; i < symcount; ++i)
2723 if (syms[i - 1]->value + syms[i - 1]->section->vma
2724 != syms[i]->value + syms[i]->section->vma)
2725 syms[j++] = syms[i];
2726 symcount = j;
2727 }
2728
2729 i = 0;
2730 if (syms[i]->section == opd)
2731 ++i;
2732 codesecsym = i;
2733
2734 for (; i < symcount; ++i)
2735 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2736 != (SEC_CODE | SEC_ALLOC))
2737 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2738 break;
2739 codesecsymend = i;
2740
2741 for (; i < symcount; ++i)
2742 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2743 break;
2744 secsymend = i;
2745
2746 for (; i < symcount; ++i)
2747 if (syms[i]->section != opd)
2748 break;
2749 opdsymend = i;
2750
2751 for (; i < symcount; ++i)
2752 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2753 != (SEC_CODE | SEC_ALLOC))
2754 break;
2755 symcount = i;
2756
2757 count = 0;
2758 if (opdsymend == secsymend)
2759 goto done;
2760
2761 if (relocatable)
2762 {
2763 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2764 arelent *r;
2765 size_t size;
2766 long relcount;
2767
2768 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2769 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2770 if (relcount == 0)
2771 goto done;
2772
2773 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2774 {
2775 count = -1;
2776 goto done;
2777 }
2778
2779 size = 0;
2780 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2781 {
2782 asymbol *sym;
2783
2784 while (r < opd->relocation + relcount
2785 && r->address < syms[i]->value + opd->vma)
2786 ++r;
2787
2788 if (r == opd->relocation + relcount)
2789 break;
2790
2791 if (r->address != syms[i]->value + opd->vma)
2792 continue;
2793
2794 if (r->howto->type != R_PPC64_ADDR64)
2795 continue;
2796
2797 sym = *r->sym_ptr_ptr;
2798 if (!sym_exists_at (syms, opdsymend, symcount,
2799 sym->section->id, sym->value + r->addend))
2800 {
2801 ++count;
2802 size += sizeof (asymbol);
2803 size += strlen (syms[i]->name) + 2;
2804 }
2805 }
2806
2807 s = *ret = bfd_malloc (size);
2808 if (s == NULL)
2809 {
2810 count = -1;
2811 goto done;
2812 }
2813
2814 names = (char *) (s + count);
2815
2816 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2817 {
2818 asymbol *sym;
2819
2820 while (r < opd->relocation + relcount
2821 && r->address < syms[i]->value + opd->vma)
2822 ++r;
2823
2824 if (r == opd->relocation + relcount)
2825 break;
2826
2827 if (r->address != syms[i]->value + opd->vma)
2828 continue;
2829
2830 if (r->howto->type != R_PPC64_ADDR64)
2831 continue;
2832
2833 sym = *r->sym_ptr_ptr;
2834 if (!sym_exists_at (syms, opdsymend, symcount,
2835 sym->section->id, sym->value + r->addend))
2836 {
2837 size_t len;
2838
2839 *s = *syms[i];
2840 s->section = sym->section;
2841 s->value = sym->value + r->addend;
2842 s->name = names;
2843 *names++ = '.';
2844 len = strlen (syms[i]->name);
2845 memcpy (names, syms[i]->name, len + 1);
2846 names += len + 1;
2847 s++;
2848 }
2849 }
2850 }
2851 else
2852 {
2853 bfd_byte *contents;
2854 size_t size;
2855
2856 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2857 {
2858 if (contents)
2859 {
2860 free_contents_and_exit:
2861 free (contents);
2862 }
2863 count = -1;
2864 goto done;
2865 }
2866
2867 size = 0;
2868 for (i = secsymend; i < opdsymend; ++i)
2869 {
2870 bfd_vma ent;
2871
2872 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2873 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2874 {
2875 ++count;
2876 size += sizeof (asymbol);
2877 size += strlen (syms[i]->name) + 2;
2878 }
2879 }
2880
2881 s = *ret = bfd_malloc (size);
2882 if (s == NULL)
2883 goto free_contents_and_exit;
2884
2885 names = (char *) (s + count);
2886
2887 for (i = secsymend; i < opdsymend; ++i)
2888 {
2889 bfd_vma ent;
2890
2891 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2892 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2893 {
2894 long lo, hi;
2895 size_t len;
2896 asection *sec = abfd->sections;
2897
2898 *s = *syms[i];
2899 lo = codesecsym;
2900 hi = codesecsymend;
2901 while (lo < hi)
2902 {
2903 long mid = (lo + hi) >> 1;
2904 if (syms[mid]->section->vma < ent)
2905 lo = mid + 1;
2906 else if (syms[mid]->section->vma > ent)
2907 hi = mid;
2908 else
2909 {
2910 sec = syms[mid]->section;
2911 break;
2912 }
2913 }
2914
2915 if (lo >= hi && lo > codesecsym)
2916 sec = syms[lo - 1]->section;
2917
2918 for (; sec != NULL; sec = sec->next)
2919 {
2920 if (sec->vma > ent)
2921 break;
2922 if ((sec->flags & SEC_ALLOC) == 0
2923 || (sec->flags & SEC_LOAD) == 0)
2924 break;
2925 if ((sec->flags & SEC_CODE) != 0)
2926 s->section = sec;
2927 }
2928 s->value = ent - s->section->vma;
2929 s->name = names;
2930 *names++ = '.';
2931 len = strlen (syms[i]->name);
2932 memcpy (names, syms[i]->name, len + 1);
2933 names += len + 1;
2934 s++;
2935 }
2936 }
2937 free (contents);
2938 }
2939
2940 done:
2941 free (syms);
2942 return count;
2943 }
2944 \f
2945 /* The following functions are specific to the ELF linker, while
2946 functions above are used generally. Those named ppc64_elf_* are
2947 called by the main ELF linker code. They appear in this file more
2948 or less in the order in which they are called. eg.
2949 ppc64_elf_check_relocs is called early in the link process,
2950 ppc64_elf_finish_dynamic_sections is one of the last functions
2951 called.
2952
2953 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2954 functions have both a function code symbol and a function descriptor
2955 symbol. A call to foo in a relocatable object file looks like:
2956
2957 . .text
2958 . x:
2959 . bl .foo
2960 . nop
2961
2962 The function definition in another object file might be:
2963
2964 . .section .opd
2965 . foo: .quad .foo
2966 . .quad .TOC.@tocbase
2967 . .quad 0
2968 .
2969 . .text
2970 . .foo: blr
2971
2972 When the linker resolves the call during a static link, the branch
2973 unsurprisingly just goes to .foo and the .opd information is unused.
2974 If the function definition is in a shared library, things are a little
2975 different: The call goes via a plt call stub, the opd information gets
2976 copied to the plt, and the linker patches the nop.
2977
2978 . x:
2979 . bl .foo_stub
2980 . ld 2,40(1)
2981 .
2982 .
2983 . .foo_stub:
2984 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2985 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2986 . std 2,40(1) # this is the general idea
2987 . ld 11,0(12)
2988 . ld 2,8(12)
2989 . mtctr 11
2990 . ld 11,16(12)
2991 . bctr
2992 .
2993 . .section .plt
2994 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2995
2996 The "reloc ()" notation is supposed to indicate that the linker emits
2997 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2998 copying.
2999
3000 What are the difficulties here? Well, firstly, the relocations
3001 examined by the linker in check_relocs are against the function code
3002 sym .foo, while the dynamic relocation in the plt is emitted against
3003 the function descriptor symbol, foo. Somewhere along the line, we need
3004 to carefully copy dynamic link information from one symbol to the other.
3005 Secondly, the generic part of the elf linker will make .foo a dynamic
3006 symbol as is normal for most other backends. We need foo dynamic
3007 instead, at least for an application final link. However, when
3008 creating a shared library containing foo, we need to have both symbols
3009 dynamic so that references to .foo are satisfied during the early
3010 stages of linking. Otherwise the linker might decide to pull in a
3011 definition from some other object, eg. a static library.
3012
3013 Update: As of August 2004, we support a new convention. Function
3014 calls may use the function descriptor symbol, ie. "bl foo". This
3015 behaves exactly as "bl .foo". */
3016
3017 /* The linker needs to keep track of the number of relocs that it
3018 decides to copy as dynamic relocs in check_relocs for each symbol.
3019 This is so that it can later discard them if they are found to be
3020 unnecessary. We store the information in a field extending the
3021 regular ELF linker hash table. */
3022
3023 struct ppc_dyn_relocs
3024 {
3025 struct ppc_dyn_relocs *next;
3026
3027 /* The input section of the reloc. */
3028 asection *sec;
3029
3030 /* Total number of relocs copied for the input section. */
3031 bfd_size_type count;
3032
3033 /* Number of pc-relative relocs copied for the input section. */
3034 bfd_size_type pc_count;
3035 };
3036
3037 /* Track GOT entries needed for a given symbol. We might need more
3038 than one got entry per symbol. */
3039 struct got_entry
3040 {
3041 struct got_entry *next;
3042
3043 /* The symbol addend that we'll be placing in the GOT. */
3044 bfd_vma addend;
3045
3046 /* Unlike other ELF targets, we use separate GOT entries for the same
3047 symbol referenced from different input files. This is to support
3048 automatic multiple TOC/GOT sections, where the TOC base can vary
3049 from one input file to another.
3050
3051 Point to the BFD owning this GOT entry. */
3052 bfd *owner;
3053
3054 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3055 TLS_TPREL or TLS_DTPREL for tls entries. */
3056 char tls_type;
3057
3058 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3059 union
3060 {
3061 bfd_signed_vma refcount;
3062 bfd_vma offset;
3063 } got;
3064 };
3065
3066 /* The same for PLT. */
3067 struct plt_entry
3068 {
3069 struct plt_entry *next;
3070
3071 bfd_vma addend;
3072
3073 union
3074 {
3075 bfd_signed_vma refcount;
3076 bfd_vma offset;
3077 } plt;
3078 };
3079
3080 /* Of those relocs that might be copied as dynamic relocs, this macro
3081 selects those that must be copied when linking a shared library,
3082 even when the symbol is local. */
3083
3084 #define MUST_BE_DYN_RELOC(RTYPE) \
3085 ((RTYPE) != R_PPC64_REL32 \
3086 && (RTYPE) != R_PPC64_REL64 \
3087 && (RTYPE) != R_PPC64_REL30)
3088
3089 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3090 copying dynamic variables from a shared lib into an app's dynbss
3091 section, and instead use a dynamic relocation to point into the
3092 shared lib. With code that gcc generates, it's vital that this be
3093 enabled; In the PowerPC64 ABI, the address of a function is actually
3094 the address of a function descriptor, which resides in the .opd
3095 section. gcc uses the descriptor directly rather than going via the
3096 GOT as some other ABI's do, which means that initialized function
3097 pointers must reference the descriptor. Thus, a function pointer
3098 initialized to the address of a function in a shared library will
3099 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3100 redefines the function descriptor symbol to point to the copy. This
3101 presents a problem as a plt entry for that function is also
3102 initialized from the function descriptor symbol and the copy reloc
3103 may not be initialized first. */
3104 #define ELIMINATE_COPY_RELOCS 1
3105
3106 /* Section name for stubs is the associated section name plus this
3107 string. */
3108 #define STUB_SUFFIX ".stub"
3109
3110 /* Linker stubs.
3111 ppc_stub_long_branch:
3112 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3113 destination, but a 24 bit branch in a stub section will reach.
3114 . b dest
3115
3116 ppc_stub_plt_branch:
3117 Similar to the above, but a 24 bit branch in the stub section won't
3118 reach its destination.
3119 . addis %r12,%r2,xxx@toc@ha
3120 . ld %r11,xxx@toc@l(%r12)
3121 . mtctr %r11
3122 . bctr
3123
3124 ppc_stub_plt_call:
3125 Used to call a function in a shared library. If it so happens that
3126 the plt entry referenced crosses a 64k boundary, then an extra
3127 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3128 xxx+16 as appropriate.
3129 . addis %r12,%r2,xxx@toc@ha
3130 . std %r2,40(%r1)
3131 . ld %r11,xxx+0@toc@l(%r12)
3132 . ld %r2,xxx+8@toc@l(%r12)
3133 . mtctr %r11
3134 . ld %r11,xxx+16@toc@l(%r12)
3135 . bctr
3136
3137 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3138 code to adjust the value and save r2 to support multiple toc sections.
3139 A ppc_stub_long_branch with an r2 offset looks like:
3140 . std %r2,40(%r1)
3141 . addis %r2,%r2,off@ha
3142 . addi %r2,%r2,off@l
3143 . b dest
3144
3145 A ppc_stub_plt_branch with an r2 offset looks like:
3146 . std %r2,40(%r1)
3147 . addis %r12,%r2,xxx@toc@ha
3148 . ld %r11,xxx@toc@l(%r12)
3149 . addis %r2,%r2,off@ha
3150 . addi %r2,%r2,off@l
3151 . mtctr %r11
3152 . bctr
3153 */
3154
3155 enum ppc_stub_type {
3156 ppc_stub_none,
3157 ppc_stub_long_branch,
3158 ppc_stub_long_branch_r2off,
3159 ppc_stub_plt_branch,
3160 ppc_stub_plt_branch_r2off,
3161 ppc_stub_plt_call
3162 };
3163
3164 struct ppc_stub_hash_entry {
3165
3166 /* Base hash table entry structure. */
3167 struct bfd_hash_entry root;
3168
3169 enum ppc_stub_type stub_type;
3170
3171 /* The stub section. */
3172 asection *stub_sec;
3173
3174 /* Offset within stub_sec of the beginning of this stub. */
3175 bfd_vma stub_offset;
3176
3177 /* Given the symbol's value and its section we can determine its final
3178 value when building the stubs (so the stub knows where to jump. */
3179 bfd_vma target_value;
3180 asection *target_section;
3181
3182 /* The symbol table entry, if any, that this was derived from. */
3183 struct ppc_link_hash_entry *h;
3184
3185 /* And the reloc addend that this was derived from. */
3186 bfd_vma addend;
3187
3188 /* Where this stub is being called from, or, in the case of combined
3189 stub sections, the first input section in the group. */
3190 asection *id_sec;
3191 };
3192
3193 struct ppc_branch_hash_entry {
3194
3195 /* Base hash table entry structure. */
3196 struct bfd_hash_entry root;
3197
3198 /* Offset within branch lookup table. */
3199 unsigned int offset;
3200
3201 /* Generation marker. */
3202 unsigned int iter;
3203 };
3204
3205 struct ppc_link_hash_entry
3206 {
3207 struct elf_link_hash_entry elf;
3208
3209 /* A pointer to the most recently used stub hash entry against this
3210 symbol. */
3211 struct ppc_stub_hash_entry *stub_cache;
3212
3213 /* Track dynamic relocs copied for this symbol. */
3214 struct ppc_dyn_relocs *dyn_relocs;
3215
3216 /* Link between function code and descriptor symbols. */
3217 struct ppc_link_hash_entry *oh;
3218
3219 /* Flag function code and descriptor symbols. */
3220 unsigned int is_func:1;
3221 unsigned int is_func_descriptor:1;
3222 unsigned int fake:1;
3223
3224 /* Whether global opd/toc sym has been adjusted or not.
3225 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3226 should be set for all globals defined in any opd/toc section. */
3227 unsigned int adjust_done:1;
3228
3229 /* Set if we twiddled this symbol to weak at some stage. */
3230 unsigned int was_undefined:1;
3231
3232 /* Contexts in which symbol is used in the GOT (or TOC).
3233 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3234 corresponding relocs are encountered during check_relocs.
3235 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3236 indicate the corresponding GOT entry type is not needed.
3237 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3238 a TPREL one. We use a separate flag rather than setting TPREL
3239 just for convenience in distinguishing the two cases. */
3240 #define TLS_GD 1 /* GD reloc. */
3241 #define TLS_LD 2 /* LD reloc. */
3242 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3243 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3244 #define TLS_TLS 16 /* Any TLS reloc. */
3245 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3246 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3247 char tls_mask;
3248 };
3249
3250 /* ppc64 ELF linker hash table. */
3251
3252 struct ppc_link_hash_table
3253 {
3254 struct elf_link_hash_table elf;
3255
3256 /* The stub hash table. */
3257 struct bfd_hash_table stub_hash_table;
3258
3259 /* Another hash table for plt_branch stubs. */
3260 struct bfd_hash_table branch_hash_table;
3261
3262 /* Linker stub bfd. */
3263 bfd *stub_bfd;
3264
3265 /* Linker call-backs. */
3266 asection * (*add_stub_section) (const char *, asection *);
3267 void (*layout_sections_again) (void);
3268
3269 /* Array to keep track of which stub sections have been created, and
3270 information on stub grouping. */
3271 struct map_stub {
3272 /* This is the section to which stubs in the group will be attached. */
3273 asection *link_sec;
3274 /* The stub section. */
3275 asection *stub_sec;
3276 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3277 bfd_vma toc_off;
3278 } *stub_group;
3279
3280 /* Temp used when calculating TOC pointers. */
3281 bfd_vma toc_curr;
3282
3283 /* Highest input section id. */
3284 int top_id;
3285
3286 /* Highest output section index. */
3287 int top_index;
3288
3289 /* List of input sections for each output section. */
3290 asection **input_list;
3291
3292 /* Short-cuts to get to dynamic linker sections. */
3293 asection *got;
3294 asection *plt;
3295 asection *relplt;
3296 asection *dynbss;
3297 asection *relbss;
3298 asection *glink;
3299 asection *sfpr;
3300 asection *brlt;
3301 asection *relbrlt;
3302
3303 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3304 struct ppc_link_hash_entry *tls_get_addr;
3305 struct ppc_link_hash_entry *tls_get_addr_fd;
3306
3307 /* Statistics. */
3308 unsigned long stub_count[ppc_stub_plt_call];
3309
3310 /* Number of stubs against global syms. */
3311 unsigned long stub_globals;
3312
3313 /* Set if we should emit symbols for stubs. */
3314 unsigned int emit_stub_syms:1;
3315
3316 /* Support for multiple toc sections. */
3317 unsigned int no_multi_toc:1;
3318 unsigned int multi_toc_needed:1;
3319
3320 /* Set on error. */
3321 unsigned int stub_error:1;
3322
3323 /* Flag set when small branches are detected. Used to
3324 select suitable defaults for the stub group size. */
3325 unsigned int has_14bit_branch:1;
3326
3327 /* Temp used by ppc64_elf_check_directives. */
3328 unsigned int twiddled_syms:1;
3329
3330 /* Incremented every time we size stubs. */
3331 unsigned int stub_iteration;
3332
3333 /* Small local sym to section mapping cache. */
3334 struct sym_sec_cache sym_sec;
3335 };
3336
3337 /* Rename some of the generic section flags to better document how they
3338 are used here. */
3339 #define has_toc_reloc has_gp_reloc
3340 #define makes_toc_func_call need_finalize_relax
3341 #define call_check_in_progress reloc_done
3342
3343 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3344
3345 #define ppc_hash_table(p) \
3346 ((struct ppc_link_hash_table *) ((p)->hash))
3347
3348 #define ppc_stub_hash_lookup(table, string, create, copy) \
3349 ((struct ppc_stub_hash_entry *) \
3350 bfd_hash_lookup ((table), (string), (create), (copy)))
3351
3352 #define ppc_branch_hash_lookup(table, string, create, copy) \
3353 ((struct ppc_branch_hash_entry *) \
3354 bfd_hash_lookup ((table), (string), (create), (copy)))
3355
3356 /* Create an entry in the stub hash table. */
3357
3358 static struct bfd_hash_entry *
3359 stub_hash_newfunc (struct bfd_hash_entry *entry,
3360 struct bfd_hash_table *table,
3361 const char *string)
3362 {
3363 /* Allocate the structure if it has not already been allocated by a
3364 subclass. */
3365 if (entry == NULL)
3366 {
3367 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3368 if (entry == NULL)
3369 return entry;
3370 }
3371
3372 /* Call the allocation method of the superclass. */
3373 entry = bfd_hash_newfunc (entry, table, string);
3374 if (entry != NULL)
3375 {
3376 struct ppc_stub_hash_entry *eh;
3377
3378 /* Initialize the local fields. */
3379 eh = (struct ppc_stub_hash_entry *) entry;
3380 eh->stub_type = ppc_stub_none;
3381 eh->stub_sec = NULL;
3382 eh->stub_offset = 0;
3383 eh->target_value = 0;
3384 eh->target_section = NULL;
3385 eh->h = NULL;
3386 eh->id_sec = NULL;
3387 }
3388
3389 return entry;
3390 }
3391
3392 /* Create an entry in the branch hash table. */
3393
3394 static struct bfd_hash_entry *
3395 branch_hash_newfunc (struct bfd_hash_entry *entry,
3396 struct bfd_hash_table *table,
3397 const char *string)
3398 {
3399 /* Allocate the structure if it has not already been allocated by a
3400 subclass. */
3401 if (entry == NULL)
3402 {
3403 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3404 if (entry == NULL)
3405 return entry;
3406 }
3407
3408 /* Call the allocation method of the superclass. */
3409 entry = bfd_hash_newfunc (entry, table, string);
3410 if (entry != NULL)
3411 {
3412 struct ppc_branch_hash_entry *eh;
3413
3414 /* Initialize the local fields. */
3415 eh = (struct ppc_branch_hash_entry *) entry;
3416 eh->offset = 0;
3417 eh->iter = 0;
3418 }
3419
3420 return entry;
3421 }
3422
3423 /* Create an entry in a ppc64 ELF linker hash table. */
3424
3425 static struct bfd_hash_entry *
3426 link_hash_newfunc (struct bfd_hash_entry *entry,
3427 struct bfd_hash_table *table,
3428 const char *string)
3429 {
3430 /* Allocate the structure if it has not already been allocated by a
3431 subclass. */
3432 if (entry == NULL)
3433 {
3434 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3435 if (entry == NULL)
3436 return entry;
3437 }
3438
3439 /* Call the allocation method of the superclass. */
3440 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3441 if (entry != NULL)
3442 {
3443 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3444
3445 memset (&eh->stub_cache, 0,
3446 (sizeof (struct ppc_link_hash_entry)
3447 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3448 }
3449
3450 return entry;
3451 }
3452
3453 /* Create a ppc64 ELF linker hash table. */
3454
3455 static struct bfd_link_hash_table *
3456 ppc64_elf_link_hash_table_create (bfd *abfd)
3457 {
3458 struct ppc_link_hash_table *htab;
3459 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3460
3461 htab = bfd_zmalloc (amt);
3462 if (htab == NULL)
3463 return NULL;
3464
3465 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3466 {
3467 free (htab);
3468 return NULL;
3469 }
3470
3471 /* Init the stub hash table too. */
3472 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3473 return NULL;
3474
3475 /* And the branch hash table. */
3476 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3477 return NULL;
3478
3479 /* Initializing two fields of the union is just cosmetic. We really
3480 only care about glist, but when compiled on a 32-bit host the
3481 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3482 debugger inspection of these fields look nicer. */
3483 htab->elf.init_got_refcount.refcount = 0;
3484 htab->elf.init_got_refcount.glist = NULL;
3485 htab->elf.init_plt_refcount.refcount = 0;
3486 htab->elf.init_plt_refcount.glist = NULL;
3487 htab->elf.init_got_offset.offset = 0;
3488 htab->elf.init_got_offset.glist = NULL;
3489 htab->elf.init_plt_offset.offset = 0;
3490 htab->elf.init_plt_offset.glist = NULL;
3491
3492 return &htab->elf.root;
3493 }
3494
3495 /* Free the derived linker hash table. */
3496
3497 static void
3498 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3499 {
3500 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3501
3502 bfd_hash_table_free (&ret->stub_hash_table);
3503 bfd_hash_table_free (&ret->branch_hash_table);
3504 _bfd_generic_link_hash_table_free (hash);
3505 }
3506
3507 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3508
3509 void
3510 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3511 {
3512 struct ppc_link_hash_table *htab;
3513
3514 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3515
3516 /* Always hook our dynamic sections into the first bfd, which is the
3517 linker created stub bfd. This ensures that the GOT header is at
3518 the start of the output TOC section. */
3519 htab = ppc_hash_table (info);
3520 htab->stub_bfd = abfd;
3521 htab->elf.dynobj = abfd;
3522 }
3523
3524 /* Build a name for an entry in the stub hash table. */
3525
3526 static char *
3527 ppc_stub_name (const asection *input_section,
3528 const asection *sym_sec,
3529 const struct ppc_link_hash_entry *h,
3530 const Elf_Internal_Rela *rel)
3531 {
3532 char *stub_name;
3533 bfd_size_type len;
3534
3535 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3536 offsets from a sym as a branch target? In fact, we could
3537 probably assume the addend is always zero. */
3538 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3539
3540 if (h)
3541 {
3542 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3543 stub_name = bfd_malloc (len);
3544 if (stub_name == NULL)
3545 return stub_name;
3546
3547 sprintf (stub_name, "%08x.%s+%x",
3548 input_section->id & 0xffffffff,
3549 h->elf.root.root.string,
3550 (int) rel->r_addend & 0xffffffff);
3551 }
3552 else
3553 {
3554 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3555 stub_name = bfd_malloc (len);
3556 if (stub_name == NULL)
3557 return stub_name;
3558
3559 sprintf (stub_name, "%08x.%x:%x+%x",
3560 input_section->id & 0xffffffff,
3561 sym_sec->id & 0xffffffff,
3562 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3563 (int) rel->r_addend & 0xffffffff);
3564 }
3565 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3566 stub_name[len - 2] = 0;
3567 return stub_name;
3568 }
3569
3570 /* Look up an entry in the stub hash. Stub entries are cached because
3571 creating the stub name takes a bit of time. */
3572
3573 static struct ppc_stub_hash_entry *
3574 ppc_get_stub_entry (const asection *input_section,
3575 const asection *sym_sec,
3576 struct ppc_link_hash_entry *h,
3577 const Elf_Internal_Rela *rel,
3578 struct ppc_link_hash_table *htab)
3579 {
3580 struct ppc_stub_hash_entry *stub_entry;
3581 const asection *id_sec;
3582
3583 /* If this input section is part of a group of sections sharing one
3584 stub section, then use the id of the first section in the group.
3585 Stub names need to include a section id, as there may well be
3586 more than one stub used to reach say, printf, and we need to
3587 distinguish between them. */
3588 id_sec = htab->stub_group[input_section->id].link_sec;
3589
3590 if (h != NULL && h->stub_cache != NULL
3591 && h->stub_cache->h == h
3592 && h->stub_cache->id_sec == id_sec)
3593 {
3594 stub_entry = h->stub_cache;
3595 }
3596 else
3597 {
3598 char *stub_name;
3599
3600 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3601 if (stub_name == NULL)
3602 return NULL;
3603
3604 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3605 stub_name, FALSE, FALSE);
3606 if (h != NULL)
3607 h->stub_cache = stub_entry;
3608
3609 free (stub_name);
3610 }
3611
3612 return stub_entry;
3613 }
3614
3615 /* Add a new stub entry to the stub hash. Not all fields of the new
3616 stub entry are initialised. */
3617
3618 static struct ppc_stub_hash_entry *
3619 ppc_add_stub (const char *stub_name,
3620 asection *section,
3621 struct ppc_link_hash_table *htab)
3622 {
3623 asection *link_sec;
3624 asection *stub_sec;
3625 struct ppc_stub_hash_entry *stub_entry;
3626
3627 link_sec = htab->stub_group[section->id].link_sec;
3628 stub_sec = htab->stub_group[section->id].stub_sec;
3629 if (stub_sec == NULL)
3630 {
3631 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3632 if (stub_sec == NULL)
3633 {
3634 size_t namelen;
3635 bfd_size_type len;
3636 char *s_name;
3637
3638 namelen = strlen (link_sec->name);
3639 len = namelen + sizeof (STUB_SUFFIX);
3640 s_name = bfd_alloc (htab->stub_bfd, len);
3641 if (s_name == NULL)
3642 return NULL;
3643
3644 memcpy (s_name, link_sec->name, namelen);
3645 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3646 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3647 if (stub_sec == NULL)
3648 return NULL;
3649 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3650 }
3651 htab->stub_group[section->id].stub_sec = stub_sec;
3652 }
3653
3654 /* Enter this entry into the linker stub hash table. */
3655 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3656 TRUE, FALSE);
3657 if (stub_entry == NULL)
3658 {
3659 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3660 section->owner, stub_name);
3661 return NULL;
3662 }
3663
3664 stub_entry->stub_sec = stub_sec;
3665 stub_entry->stub_offset = 0;
3666 stub_entry->id_sec = link_sec;
3667 return stub_entry;
3668 }
3669
3670 /* Create sections for linker generated code. */
3671
3672 static bfd_boolean
3673 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3674 {
3675 struct ppc_link_hash_table *htab;
3676 flagword flags;
3677
3678 htab = ppc_hash_table (info);
3679
3680 /* Create .sfpr for code to save and restore fp regs. */
3681 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3682 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3683 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3684 flags);
3685 if (htab->sfpr == NULL
3686 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3687 return FALSE;
3688
3689 /* Create .glink for lazy dynamic linking support. */
3690 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3691 flags);
3692 if (htab->glink == NULL
3693 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3694 return FALSE;
3695
3696 /* Create branch lookup table for plt_branch stubs. */
3697 if (info->shared)
3698 {
3699 flags = (SEC_ALLOC | SEC_LOAD
3700 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3701 htab->brlt
3702 = bfd_make_section_anyway_with_flags (dynobj, ".data.rel.ro.brlt",
3703 flags);
3704 }
3705 else
3706 {
3707 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3708 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3709 htab->brlt
3710 = bfd_make_section_anyway_with_flags (dynobj, ".rodata.brlt", flags);
3711 }
3712
3713 if (htab->brlt == NULL
3714 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3715 return FALSE;
3716
3717 if (info->shared)
3718 {
3719 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3720 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3721 htab->relbrlt
3722 = bfd_make_section_anyway_with_flags (dynobj, ".rela.data.rel.ro.brlt",
3723 flags);
3724 }
3725 else if (info->emitrelocations)
3726 {
3727 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3728 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3729 htab->relbrlt
3730 = bfd_make_section_anyway_with_flags (dynobj, ".rela.rodata.brlt",
3731 flags);
3732 }
3733 else
3734 return TRUE;
3735
3736 if (!htab->relbrlt
3737 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3738 return FALSE;
3739
3740 return TRUE;
3741 }
3742
3743 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3744 not already done. */
3745
3746 static bfd_boolean
3747 create_got_section (bfd *abfd, struct bfd_link_info *info)
3748 {
3749 asection *got, *relgot;
3750 flagword flags;
3751 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3752
3753 if (!htab->got)
3754 {
3755 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3756 return FALSE;
3757
3758 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3759 if (!htab->got)
3760 abort ();
3761 }
3762
3763 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3764 | SEC_LINKER_CREATED);
3765
3766 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3767 if (!got
3768 || !bfd_set_section_alignment (abfd, got, 3))
3769 return FALSE;
3770
3771 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3772 flags | SEC_READONLY);
3773 if (!relgot
3774 || ! bfd_set_section_alignment (abfd, relgot, 3))
3775 return FALSE;
3776
3777 ppc64_elf_tdata (abfd)->got = got;
3778 ppc64_elf_tdata (abfd)->relgot = relgot;
3779 return TRUE;
3780 }
3781
3782 /* Create the dynamic sections, and set up shortcuts. */
3783
3784 static bfd_boolean
3785 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3786 {
3787 struct ppc_link_hash_table *htab;
3788
3789 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3790 return FALSE;
3791
3792 htab = ppc_hash_table (info);
3793 if (!htab->got)
3794 htab->got = bfd_get_section_by_name (dynobj, ".got");
3795 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3796 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3797 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3798 if (!info->shared)
3799 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3800
3801 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3802 || (!info->shared && !htab->relbss))
3803 abort ();
3804
3805 return TRUE;
3806 }
3807
3808 /* Merge PLT info on FROM with that on TO. */
3809
3810 static void
3811 move_plt_plist (struct ppc_link_hash_entry *from,
3812 struct ppc_link_hash_entry *to)
3813 {
3814 if (from->elf.plt.plist != NULL)
3815 {
3816 if (to->elf.plt.plist != NULL)
3817 {
3818 struct plt_entry **entp;
3819 struct plt_entry *ent;
3820
3821 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3822 {
3823 struct plt_entry *dent;
3824
3825 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3826 if (dent->addend == ent->addend)
3827 {
3828 dent->plt.refcount += ent->plt.refcount;
3829 *entp = ent->next;
3830 break;
3831 }
3832 if (dent == NULL)
3833 entp = &ent->next;
3834 }
3835 *entp = to->elf.plt.plist;
3836 }
3837
3838 to->elf.plt.plist = from->elf.plt.plist;
3839 from->elf.plt.plist = NULL;
3840 }
3841 }
3842
3843 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3844
3845 static void
3846 ppc64_elf_copy_indirect_symbol
3847 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3848 struct elf_link_hash_entry *dir,
3849 struct elf_link_hash_entry *ind)
3850 {
3851 struct ppc_link_hash_entry *edir, *eind;
3852
3853 edir = (struct ppc_link_hash_entry *) dir;
3854 eind = (struct ppc_link_hash_entry *) ind;
3855
3856 /* Copy over any dynamic relocs we may have on the indirect sym. */
3857 if (eind->dyn_relocs != NULL)
3858 {
3859 if (edir->dyn_relocs != NULL)
3860 {
3861 struct ppc_dyn_relocs **pp;
3862 struct ppc_dyn_relocs *p;
3863
3864 if (eind->elf.root.type == bfd_link_hash_indirect)
3865 abort ();
3866
3867 /* Add reloc counts against the weak sym to the strong sym
3868 list. Merge any entries against the same section. */
3869 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3870 {
3871 struct ppc_dyn_relocs *q;
3872
3873 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3874 if (q->sec == p->sec)
3875 {
3876 q->pc_count += p->pc_count;
3877 q->count += p->count;
3878 *pp = p->next;
3879 break;
3880 }
3881 if (q == NULL)
3882 pp = &p->next;
3883 }
3884 *pp = edir->dyn_relocs;
3885 }
3886
3887 edir->dyn_relocs = eind->dyn_relocs;
3888 eind->dyn_relocs = NULL;
3889 }
3890
3891 edir->is_func |= eind->is_func;
3892 edir->is_func_descriptor |= eind->is_func_descriptor;
3893 edir->tls_mask |= eind->tls_mask;
3894
3895 /* If called to transfer flags for a weakdef during processing
3896 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3897 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3898 if (!(ELIMINATE_COPY_RELOCS
3899 && eind->elf.root.type != bfd_link_hash_indirect
3900 && edir->elf.dynamic_adjusted))
3901 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3902
3903 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3904 edir->elf.ref_regular |= eind->elf.ref_regular;
3905 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3906 edir->elf.needs_plt |= eind->elf.needs_plt;
3907
3908 /* If we were called to copy over info for a weak sym, that's all. */
3909 if (eind->elf.root.type != bfd_link_hash_indirect)
3910 return;
3911
3912 /* Copy over got entries that we may have already seen to the
3913 symbol which just became indirect. */
3914 if (eind->elf.got.glist != NULL)
3915 {
3916 if (edir->elf.got.glist != NULL)
3917 {
3918 struct got_entry **entp;
3919 struct got_entry *ent;
3920
3921 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3922 {
3923 struct got_entry *dent;
3924
3925 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3926 if (dent->addend == ent->addend
3927 && dent->owner == ent->owner
3928 && dent->tls_type == ent->tls_type)
3929 {
3930 dent->got.refcount += ent->got.refcount;
3931 *entp = ent->next;
3932 break;
3933 }
3934 if (dent == NULL)
3935 entp = &ent->next;
3936 }
3937 *entp = edir->elf.got.glist;
3938 }
3939
3940 edir->elf.got.glist = eind->elf.got.glist;
3941 eind->elf.got.glist = NULL;
3942 }
3943
3944 /* And plt entries. */
3945 move_plt_plist (eind, edir);
3946
3947 if (edir->elf.dynindx == -1)
3948 {
3949 edir->elf.dynindx = eind->elf.dynindx;
3950 edir->elf.dynstr_index = eind->elf.dynstr_index;
3951 eind->elf.dynindx = -1;
3952 eind->elf.dynstr_index = 0;
3953 }
3954 else
3955 BFD_ASSERT (eind->elf.dynindx == -1);
3956 }
3957
3958 /* Find the function descriptor hash entry from the given function code
3959 hash entry FH. Link the entries via their OH fields. */
3960
3961 static struct ppc_link_hash_entry *
3962 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3963 {
3964 struct ppc_link_hash_entry *fdh = fh->oh;
3965
3966 if (fdh == NULL)
3967 {
3968 const char *fd_name = fh->elf.root.root.string + 1;
3969
3970 fdh = (struct ppc_link_hash_entry *)
3971 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3972 if (fdh != NULL)
3973 {
3974 fdh->is_func_descriptor = 1;
3975 fdh->oh = fh;
3976 fh->is_func = 1;
3977 fh->oh = fdh;
3978 }
3979 }
3980
3981 return fdh;
3982 }
3983
3984 /* Make a fake function descriptor sym for the code sym FH. */
3985
3986 static struct ppc_link_hash_entry *
3987 make_fdh (struct bfd_link_info *info,
3988 struct ppc_link_hash_entry *fh)
3989 {
3990 bfd *abfd;
3991 asymbol *newsym;
3992 struct bfd_link_hash_entry *bh;
3993 struct ppc_link_hash_entry *fdh;
3994
3995 abfd = fh->elf.root.u.undef.abfd;
3996 newsym = bfd_make_empty_symbol (abfd);
3997 newsym->name = fh->elf.root.root.string + 1;
3998 newsym->section = bfd_und_section_ptr;
3999 newsym->value = 0;
4000 newsym->flags = BSF_WEAK;
4001
4002 bh = NULL;
4003 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4004 newsym->flags, newsym->section,
4005 newsym->value, NULL, FALSE, FALSE,
4006 &bh))
4007 return NULL;
4008
4009 fdh = (struct ppc_link_hash_entry *) bh;
4010 fdh->elf.non_elf = 0;
4011 fdh->fake = 1;
4012 fdh->is_func_descriptor = 1;
4013 fdh->oh = fh;
4014 fh->is_func = 1;
4015 fh->oh = fdh;
4016 return fdh;
4017 }
4018
4019 /* Hacks to support old ABI code.
4020 When making function calls, old ABI code references function entry
4021 points (dot symbols), while new ABI code references the function
4022 descriptor symbol. We need to make any combination of reference and
4023 definition work together, without breaking archive linking.
4024
4025 For a defined function "foo" and an undefined call to "bar":
4026 An old object defines "foo" and ".foo", references ".bar" (possibly
4027 "bar" too).
4028 A new object defines "foo" and references "bar".
4029
4030 A new object thus has no problem with its undefined symbols being
4031 satisfied by definitions in an old object. On the other hand, the
4032 old object won't have ".bar" satisfied by a new object. */
4033
4034 /* Fix function descriptor symbols defined in .opd sections to be
4035 function type. */
4036
4037 static bfd_boolean
4038 ppc64_elf_add_symbol_hook (bfd *ibfd,
4039 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4040 Elf_Internal_Sym *isym,
4041 const char **name,
4042 flagword *flags ATTRIBUTE_UNUSED,
4043 asection **sec,
4044 bfd_vma *value ATTRIBUTE_UNUSED)
4045 {
4046 if (*sec != NULL
4047 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4048 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4049
4050 if ((*name)[0] == '.'
4051 && ELF_ST_BIND (isym->st_info) == STB_GLOBAL
4052 && ELF_ST_TYPE (isym->st_info) < STT_SECTION
4053 && is_ppc64_elf_target (ibfd->xvec))
4054 ppc64_elf_tdata (ibfd)->u.has_dotsym = 1;
4055
4056 return TRUE;
4057 }
4058
4059 /* This function makes an old ABI object reference to ".bar" cause the
4060 inclusion of a new ABI object archive that defines "bar".
4061 NAME is a symbol defined in an archive. Return a symbol in the hash
4062 table that might be satisfied by the archive symbols. */
4063
4064 static struct elf_link_hash_entry *
4065 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4066 struct bfd_link_info *info,
4067 const char *name)
4068 {
4069 struct elf_link_hash_entry *h;
4070 char *dot_name;
4071 size_t len;
4072
4073 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4074 if (h != NULL
4075 /* Don't return this sym if it is a fake function descriptor
4076 created by add_symbol_adjust. */
4077 && !(h->root.type == bfd_link_hash_undefweak
4078 && ((struct ppc_link_hash_entry *) h)->fake))
4079 return h;
4080
4081 if (name[0] == '.')
4082 return h;
4083
4084 len = strlen (name);
4085 dot_name = bfd_alloc (abfd, len + 2);
4086 if (dot_name == NULL)
4087 return (struct elf_link_hash_entry *) 0 - 1;
4088 dot_name[0] = '.';
4089 memcpy (dot_name + 1, name, len + 1);
4090 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4091 bfd_release (abfd, dot_name);
4092 return h;
4093 }
4094
4095 /* This function satisfies all old ABI object references to ".bar" if a
4096 new ABI object defines "bar". Well, at least, undefined dot symbols
4097 are made weak. This stops later archive searches from including an
4098 object if we already have a function descriptor definition. It also
4099 prevents the linker complaining about undefined symbols.
4100 We also check and correct mismatched symbol visibility here. The
4101 most restrictive visibility of the function descriptor and the
4102 function entry symbol is used. */
4103
4104 struct add_symbol_adjust_data
4105 {
4106 struct bfd_link_info *info;
4107 bfd_boolean ok;
4108 };
4109
4110 static bfd_boolean
4111 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4112 {
4113 struct add_symbol_adjust_data *data;
4114 struct ppc_link_hash_table *htab;
4115 struct ppc_link_hash_entry *eh;
4116 struct ppc_link_hash_entry *fdh;
4117
4118 if (h->root.type == bfd_link_hash_indirect)
4119 return TRUE;
4120
4121 if (h->root.type == bfd_link_hash_warning)
4122 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4123
4124 if (h->root.root.string[0] != '.')
4125 return TRUE;
4126
4127 data = inf;
4128 htab = ppc_hash_table (data->info);
4129 eh = (struct ppc_link_hash_entry *) h;
4130 fdh = get_fdh (eh, htab);
4131 if (fdh == NULL
4132 && !data->info->relocatable
4133 && (eh->elf.root.type == bfd_link_hash_undefined
4134 || eh->elf.root.type == bfd_link_hash_undefweak)
4135 && eh->elf.ref_regular)
4136 {
4137 /* Make an undefweak function descriptor sym, which is enough to
4138 pull in an --as-needed shared lib, but won't cause link
4139 errors. Archives are handled elsewhere. */
4140 fdh = make_fdh (data->info, eh);
4141 if (fdh == NULL)
4142 data->ok = FALSE;
4143 else
4144 fdh->elf.ref_regular = 1;
4145 }
4146 else if (fdh != NULL)
4147 {
4148 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4149 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4150 if (entry_vis < descr_vis)
4151 fdh->elf.other += entry_vis - descr_vis;
4152 else if (entry_vis > descr_vis)
4153 eh->elf.other += descr_vis - entry_vis;
4154
4155 if ((fdh->elf.root.type == bfd_link_hash_defined
4156 || fdh->elf.root.type == bfd_link_hash_defweak)
4157 && eh->elf.root.type == bfd_link_hash_undefined)
4158 {
4159 eh->elf.root.type = bfd_link_hash_undefweak;
4160 eh->was_undefined = 1;
4161 htab->twiddled_syms = 1;
4162 }
4163 }
4164
4165 return TRUE;
4166 }
4167
4168 static bfd_boolean
4169 ppc64_elf_check_directives (bfd *abfd, struct bfd_link_info *info)
4170 {
4171 struct ppc_link_hash_table *htab;
4172 struct add_symbol_adjust_data data;
4173
4174 if (!is_ppc64_elf_target (abfd->xvec))
4175 return TRUE;
4176
4177 if (!ppc64_elf_tdata (abfd)->u.has_dotsym)
4178 return TRUE;
4179 ppc64_elf_tdata (abfd)->u.deleted_section = NULL;
4180
4181 htab = ppc_hash_table (info);
4182 if (!is_ppc64_elf_target (htab->elf.root.creator))
4183 return TRUE;
4184
4185 data.info = info;
4186 data.ok = TRUE;
4187 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4188
4189 /* We need to fix the undefs list for any syms we have twiddled to
4190 undef_weak. */
4191 if (htab->twiddled_syms)
4192 {
4193 bfd_link_repair_undef_list (&htab->elf.root);
4194 htab->twiddled_syms = 0;
4195 }
4196 return data.ok;
4197 }
4198
4199 static bfd_boolean
4200 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4201 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4202 {
4203 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4204 char *local_got_tls_masks;
4205
4206 if (local_got_ents == NULL)
4207 {
4208 bfd_size_type size = symtab_hdr->sh_info;
4209
4210 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4211 local_got_ents = bfd_zalloc (abfd, size);
4212 if (local_got_ents == NULL)
4213 return FALSE;
4214 elf_local_got_ents (abfd) = local_got_ents;
4215 }
4216
4217 if ((tls_type & TLS_EXPLICIT) == 0)
4218 {
4219 struct got_entry *ent;
4220
4221 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4222 if (ent->addend == r_addend
4223 && ent->owner == abfd
4224 && ent->tls_type == tls_type)
4225 break;
4226 if (ent == NULL)
4227 {
4228 bfd_size_type amt = sizeof (*ent);
4229 ent = bfd_alloc (abfd, amt);
4230 if (ent == NULL)
4231 return FALSE;
4232 ent->next = local_got_ents[r_symndx];
4233 ent->addend = r_addend;
4234 ent->owner = abfd;
4235 ent->tls_type = tls_type;
4236 ent->got.refcount = 0;
4237 local_got_ents[r_symndx] = ent;
4238 }
4239 ent->got.refcount += 1;
4240 }
4241
4242 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4243 local_got_tls_masks[r_symndx] |= tls_type;
4244 return TRUE;
4245 }
4246
4247 static bfd_boolean
4248 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4249 {
4250 struct plt_entry *ent;
4251
4252 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4253 if (ent->addend == addend)
4254 break;
4255 if (ent == NULL)
4256 {
4257 bfd_size_type amt = sizeof (*ent);
4258 ent = bfd_alloc (abfd, amt);
4259 if (ent == NULL)
4260 return FALSE;
4261 ent->next = eh->elf.plt.plist;
4262 ent->addend = addend;
4263 ent->plt.refcount = 0;
4264 eh->elf.plt.plist = ent;
4265 }
4266 ent->plt.refcount += 1;
4267 eh->elf.needs_plt = 1;
4268 if (eh->elf.root.root.string[0] == '.'
4269 && eh->elf.root.root.string[1] != '\0')
4270 eh->is_func = 1;
4271 return TRUE;
4272 }
4273
4274 /* Look through the relocs for a section during the first phase, and
4275 calculate needed space in the global offset table, procedure
4276 linkage table, and dynamic reloc sections. */
4277
4278 static bfd_boolean
4279 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4280 asection *sec, const Elf_Internal_Rela *relocs)
4281 {
4282 struct ppc_link_hash_table *htab;
4283 Elf_Internal_Shdr *symtab_hdr;
4284 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4285 const Elf_Internal_Rela *rel;
4286 const Elf_Internal_Rela *rel_end;
4287 asection *sreloc;
4288 asection **opd_sym_map;
4289
4290 if (info->relocatable)
4291 return TRUE;
4292
4293 /* Don't do anything special with non-loaded, non-alloced sections.
4294 In particular, any relocs in such sections should not affect GOT
4295 and PLT reference counting (ie. we don't allow them to create GOT
4296 or PLT entries), there's no possibility or desire to optimize TLS
4297 relocs, and there's not much point in propagating relocs to shared
4298 libs that the dynamic linker won't relocate. */
4299 if ((sec->flags & SEC_ALLOC) == 0)
4300 return TRUE;
4301
4302 htab = ppc_hash_table (info);
4303 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4304
4305 sym_hashes = elf_sym_hashes (abfd);
4306 sym_hashes_end = (sym_hashes
4307 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4308 - symtab_hdr->sh_info);
4309
4310 sreloc = NULL;
4311 opd_sym_map = NULL;
4312 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4313 {
4314 /* Garbage collection needs some extra help with .opd sections.
4315 We don't want to necessarily keep everything referenced by
4316 relocs in .opd, as that would keep all functions. Instead,
4317 if we reference an .opd symbol (a function descriptor), we
4318 want to keep the function code symbol's section. This is
4319 easy for global symbols, but for local syms we need to keep
4320 information about the associated function section. Later, if
4321 edit_opd deletes entries, we'll use this array to adjust
4322 local syms in .opd. */
4323 union opd_info {
4324 asection *func_section;
4325 long entry_adjust;
4326 };
4327 bfd_size_type amt;
4328
4329 amt = sec->size * sizeof (union opd_info) / 8;
4330 opd_sym_map = bfd_zalloc (abfd, amt);
4331 if (opd_sym_map == NULL)
4332 return FALSE;
4333 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4334 }
4335
4336 if (htab->sfpr == NULL
4337 && !create_linkage_sections (htab->elf.dynobj, info))
4338 return FALSE;
4339
4340 rel_end = relocs + sec->reloc_count;
4341 for (rel = relocs; rel < rel_end; rel++)
4342 {
4343 unsigned long r_symndx;
4344 struct elf_link_hash_entry *h;
4345 enum elf_ppc64_reloc_type r_type;
4346 int tls_type = 0;
4347
4348 r_symndx = ELF64_R_SYM (rel->r_info);
4349 if (r_symndx < symtab_hdr->sh_info)
4350 h = NULL;
4351 else
4352 {
4353 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4354 while (h->root.type == bfd_link_hash_indirect
4355 || h->root.type == bfd_link_hash_warning)
4356 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4357 }
4358
4359 r_type = ELF64_R_TYPE (rel->r_info);
4360 switch (r_type)
4361 {
4362 case R_PPC64_GOT_TLSLD16:
4363 case R_PPC64_GOT_TLSLD16_LO:
4364 case R_PPC64_GOT_TLSLD16_HI:
4365 case R_PPC64_GOT_TLSLD16_HA:
4366 ppc64_tlsld_got (abfd)->refcount += 1;
4367 tls_type = TLS_TLS | TLS_LD;
4368 goto dogottls;
4369
4370 case R_PPC64_GOT_TLSGD16:
4371 case R_PPC64_GOT_TLSGD16_LO:
4372 case R_PPC64_GOT_TLSGD16_HI:
4373 case R_PPC64_GOT_TLSGD16_HA:
4374 tls_type = TLS_TLS | TLS_GD;
4375 goto dogottls;
4376
4377 case R_PPC64_GOT_TPREL16_DS:
4378 case R_PPC64_GOT_TPREL16_LO_DS:
4379 case R_PPC64_GOT_TPREL16_HI:
4380 case R_PPC64_GOT_TPREL16_HA:
4381 if (info->shared)
4382 info->flags |= DF_STATIC_TLS;
4383 tls_type = TLS_TLS | TLS_TPREL;
4384 goto dogottls;
4385
4386 case R_PPC64_GOT_DTPREL16_DS:
4387 case R_PPC64_GOT_DTPREL16_LO_DS:
4388 case R_PPC64_GOT_DTPREL16_HI:
4389 case R_PPC64_GOT_DTPREL16_HA:
4390 tls_type = TLS_TLS | TLS_DTPREL;
4391 dogottls:
4392 sec->has_tls_reloc = 1;
4393 /* Fall thru */
4394
4395 case R_PPC64_GOT16:
4396 case R_PPC64_GOT16_DS:
4397 case R_PPC64_GOT16_HA:
4398 case R_PPC64_GOT16_HI:
4399 case R_PPC64_GOT16_LO:
4400 case R_PPC64_GOT16_LO_DS:
4401 /* This symbol requires a global offset table entry. */
4402 sec->has_toc_reloc = 1;
4403 if (ppc64_elf_tdata (abfd)->got == NULL
4404 && !create_got_section (abfd, info))
4405 return FALSE;
4406
4407 if (h != NULL)
4408 {
4409 struct ppc_link_hash_entry *eh;
4410 struct got_entry *ent;
4411
4412 eh = (struct ppc_link_hash_entry *) h;
4413 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4414 if (ent->addend == rel->r_addend
4415 && ent->owner == abfd
4416 && ent->tls_type == tls_type)
4417 break;
4418 if (ent == NULL)
4419 {
4420 bfd_size_type amt = sizeof (*ent);
4421 ent = bfd_alloc (abfd, amt);
4422 if (ent == NULL)
4423 return FALSE;
4424 ent->next = eh->elf.got.glist;
4425 ent->addend = rel->r_addend;
4426 ent->owner = abfd;
4427 ent->tls_type = tls_type;
4428 ent->got.refcount = 0;
4429 eh->elf.got.glist = ent;
4430 }
4431 ent->got.refcount += 1;
4432 eh->tls_mask |= tls_type;
4433 }
4434 else
4435 /* This is a global offset table entry for a local symbol. */
4436 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4437 rel->r_addend, tls_type))
4438 return FALSE;
4439 break;
4440
4441 case R_PPC64_PLT16_HA:
4442 case R_PPC64_PLT16_HI:
4443 case R_PPC64_PLT16_LO:
4444 case R_PPC64_PLT32:
4445 case R_PPC64_PLT64:
4446 /* This symbol requires a procedure linkage table entry. We
4447 actually build the entry in adjust_dynamic_symbol,
4448 because this might be a case of linking PIC code without
4449 linking in any dynamic objects, in which case we don't
4450 need to generate a procedure linkage table after all. */
4451 if (h == NULL)
4452 {
4453 /* It does not make sense to have a procedure linkage
4454 table entry for a local symbol. */
4455 bfd_set_error (bfd_error_bad_value);
4456 return FALSE;
4457 }
4458 else
4459 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4460 rel->r_addend))
4461 return FALSE;
4462 break;
4463
4464 /* The following relocations don't need to propagate the
4465 relocation if linking a shared object since they are
4466 section relative. */
4467 case R_PPC64_SECTOFF:
4468 case R_PPC64_SECTOFF_LO:
4469 case R_PPC64_SECTOFF_HI:
4470 case R_PPC64_SECTOFF_HA:
4471 case R_PPC64_SECTOFF_DS:
4472 case R_PPC64_SECTOFF_LO_DS:
4473 case R_PPC64_DTPREL16:
4474 case R_PPC64_DTPREL16_LO:
4475 case R_PPC64_DTPREL16_HI:
4476 case R_PPC64_DTPREL16_HA:
4477 case R_PPC64_DTPREL16_DS:
4478 case R_PPC64_DTPREL16_LO_DS:
4479 case R_PPC64_DTPREL16_HIGHER:
4480 case R_PPC64_DTPREL16_HIGHERA:
4481 case R_PPC64_DTPREL16_HIGHEST:
4482 case R_PPC64_DTPREL16_HIGHESTA:
4483 break;
4484
4485 /* Nor do these. */
4486 case R_PPC64_TOC16:
4487 case R_PPC64_TOC16_LO:
4488 case R_PPC64_TOC16_HI:
4489 case R_PPC64_TOC16_HA:
4490 case R_PPC64_TOC16_DS:
4491 case R_PPC64_TOC16_LO_DS:
4492 sec->has_toc_reloc = 1;
4493 break;
4494
4495 /* This relocation describes the C++ object vtable hierarchy.
4496 Reconstruct it for later use during GC. */
4497 case R_PPC64_GNU_VTINHERIT:
4498 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4499 return FALSE;
4500 break;
4501
4502 /* This relocation describes which C++ vtable entries are actually
4503 used. Record for later use during GC. */
4504 case R_PPC64_GNU_VTENTRY:
4505 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4506 return FALSE;
4507 break;
4508
4509 case R_PPC64_REL14:
4510 case R_PPC64_REL14_BRTAKEN:
4511 case R_PPC64_REL14_BRNTAKEN:
4512 htab->has_14bit_branch = 1;
4513 /* Fall through. */
4514
4515 case R_PPC64_REL24:
4516 if (h != NULL)
4517 {
4518 /* We may need a .plt entry if the function this reloc
4519 refers to is in a shared lib. */
4520 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4521 rel->r_addend))
4522 return FALSE;
4523 if (h == &htab->tls_get_addr->elf
4524 || h == &htab->tls_get_addr_fd->elf)
4525 sec->has_tls_reloc = 1;
4526 else if (htab->tls_get_addr == NULL
4527 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4528 && (h->root.root.string[15] == 0
4529 || h->root.root.string[15] == '@'))
4530 {
4531 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4532 sec->has_tls_reloc = 1;
4533 }
4534 else if (htab->tls_get_addr_fd == NULL
4535 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4536 && (h->root.root.string[14] == 0
4537 || h->root.root.string[14] == '@'))
4538 {
4539 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4540 sec->has_tls_reloc = 1;
4541 }
4542 }
4543 break;
4544
4545 case R_PPC64_TPREL64:
4546 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4547 if (info->shared)
4548 info->flags |= DF_STATIC_TLS;
4549 goto dotlstoc;
4550
4551 case R_PPC64_DTPMOD64:
4552 if (rel + 1 < rel_end
4553 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4554 && rel[1].r_offset == rel->r_offset + 8)
4555 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4556 else
4557 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4558 goto dotlstoc;
4559
4560 case R_PPC64_DTPREL64:
4561 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4562 if (rel != relocs
4563 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4564 && rel[-1].r_offset == rel->r_offset - 8)
4565 /* This is the second reloc of a dtpmod, dtprel pair.
4566 Don't mark with TLS_DTPREL. */
4567 goto dodyn;
4568
4569 dotlstoc:
4570 sec->has_tls_reloc = 1;
4571 if (h != NULL)
4572 {
4573 struct ppc_link_hash_entry *eh;
4574 eh = (struct ppc_link_hash_entry *) h;
4575 eh->tls_mask |= tls_type;
4576 }
4577 else
4578 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4579 rel->r_addend, tls_type))
4580 return FALSE;
4581
4582 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4583 {
4584 /* One extra to simplify get_tls_mask. */
4585 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4586 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4587 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4588 return FALSE;
4589 }
4590 BFD_ASSERT (rel->r_offset % 8 == 0);
4591 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4592
4593 /* Mark the second slot of a GD or LD entry.
4594 -1 to indicate GD and -2 to indicate LD. */
4595 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4596 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4597 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4598 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4599 goto dodyn;
4600
4601 case R_PPC64_TPREL16:
4602 case R_PPC64_TPREL16_LO:
4603 case R_PPC64_TPREL16_HI:
4604 case R_PPC64_TPREL16_HA:
4605 case R_PPC64_TPREL16_DS:
4606 case R_PPC64_TPREL16_LO_DS:
4607 case R_PPC64_TPREL16_HIGHER:
4608 case R_PPC64_TPREL16_HIGHERA:
4609 case R_PPC64_TPREL16_HIGHEST:
4610 case R_PPC64_TPREL16_HIGHESTA:
4611 if (info->shared)
4612 {
4613 info->flags |= DF_STATIC_TLS;
4614 goto dodyn;
4615 }
4616 break;
4617
4618 case R_PPC64_ADDR64:
4619 if (opd_sym_map != NULL
4620 && rel + 1 < rel_end
4621 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4622 {
4623 if (h != NULL)
4624 {
4625 if (h->root.root.string[0] == '.'
4626 && h->root.root.string[1] != 0
4627 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4628 ;
4629 else
4630 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4631 }
4632 else
4633 {
4634 asection *s;
4635
4636 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4637 r_symndx);
4638 if (s == NULL)
4639 return FALSE;
4640 else if (s != sec)
4641 opd_sym_map[rel->r_offset / 8] = s;
4642 }
4643 }
4644 /* Fall through. */
4645
4646 case R_PPC64_REL30:
4647 case R_PPC64_REL32:
4648 case R_PPC64_REL64:
4649 case R_PPC64_ADDR14:
4650 case R_PPC64_ADDR14_BRNTAKEN:
4651 case R_PPC64_ADDR14_BRTAKEN:
4652 case R_PPC64_ADDR16:
4653 case R_PPC64_ADDR16_DS:
4654 case R_PPC64_ADDR16_HA:
4655 case R_PPC64_ADDR16_HI:
4656 case R_PPC64_ADDR16_HIGHER:
4657 case R_PPC64_ADDR16_HIGHERA:
4658 case R_PPC64_ADDR16_HIGHEST:
4659 case R_PPC64_ADDR16_HIGHESTA:
4660 case R_PPC64_ADDR16_LO:
4661 case R_PPC64_ADDR16_LO_DS:
4662 case R_PPC64_ADDR24:
4663 case R_PPC64_ADDR32:
4664 case R_PPC64_UADDR16:
4665 case R_PPC64_UADDR32:
4666 case R_PPC64_UADDR64:
4667 case R_PPC64_TOC:
4668 if (h != NULL && !info->shared)
4669 /* We may need a copy reloc. */
4670 h->non_got_ref = 1;
4671
4672 /* Don't propagate .opd relocs. */
4673 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4674 break;
4675
4676 /* If we are creating a shared library, and this is a reloc
4677 against a global symbol, or a non PC relative reloc
4678 against a local symbol, then we need to copy the reloc
4679 into the shared library. However, if we are linking with
4680 -Bsymbolic, we do not need to copy a reloc against a
4681 global symbol which is defined in an object we are
4682 including in the link (i.e., DEF_REGULAR is set). At
4683 this point we have not seen all the input files, so it is
4684 possible that DEF_REGULAR is not set now but will be set
4685 later (it is never cleared). In case of a weak definition,
4686 DEF_REGULAR may be cleared later by a strong definition in
4687 a shared library. We account for that possibility below by
4688 storing information in the dyn_relocs field of the hash
4689 table entry. A similar situation occurs when creating
4690 shared libraries and symbol visibility changes render the
4691 symbol local.
4692
4693 If on the other hand, we are creating an executable, we
4694 may need to keep relocations for symbols satisfied by a
4695 dynamic library if we manage to avoid copy relocs for the
4696 symbol. */
4697 dodyn:
4698 if ((info->shared
4699 && (MUST_BE_DYN_RELOC (r_type)
4700 || (h != NULL
4701 && (! info->symbolic
4702 || h->root.type == bfd_link_hash_defweak
4703 || !h->def_regular))))
4704 || (ELIMINATE_COPY_RELOCS
4705 && !info->shared
4706 && h != NULL
4707 && (h->root.type == bfd_link_hash_defweak
4708 || !h->def_regular)))
4709 {
4710 struct ppc_dyn_relocs *p;
4711 struct ppc_dyn_relocs **head;
4712
4713 /* We must copy these reloc types into the output file.
4714 Create a reloc section in dynobj and make room for
4715 this reloc. */
4716 if (sreloc == NULL)
4717 {
4718 const char *name;
4719 bfd *dynobj;
4720
4721 name = (bfd_elf_string_from_elf_section
4722 (abfd,
4723 elf_elfheader (abfd)->e_shstrndx,
4724 elf_section_data (sec)->rel_hdr.sh_name));
4725 if (name == NULL)
4726 return FALSE;
4727
4728 if (strncmp (name, ".rela", 5) != 0
4729 || strcmp (bfd_get_section_name (abfd, sec),
4730 name + 5) != 0)
4731 {
4732 (*_bfd_error_handler)
4733 (_("%B: bad relocation section name `%s\'"),
4734 abfd, name);
4735 bfd_set_error (bfd_error_bad_value);
4736 }
4737
4738 dynobj = htab->elf.dynobj;
4739 sreloc = bfd_get_section_by_name (dynobj, name);
4740 if (sreloc == NULL)
4741 {
4742 flagword flags;
4743
4744 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4745 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4746 | SEC_ALLOC | SEC_LOAD);
4747 sreloc = bfd_make_section_with_flags (dynobj,
4748 name,
4749 flags);
4750 if (sreloc == NULL
4751 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4752 return FALSE;
4753 }
4754 elf_section_data (sec)->sreloc = sreloc;
4755 }
4756
4757 /* If this is a global symbol, we count the number of
4758 relocations we need for this symbol. */
4759 if (h != NULL)
4760 {
4761 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4762 }
4763 else
4764 {
4765 /* Track dynamic relocs needed for local syms too.
4766 We really need local syms available to do this
4767 easily. Oh well. */
4768
4769 asection *s;
4770 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4771 sec, r_symndx);
4772 if (s == NULL)
4773 return FALSE;
4774
4775 head = ((struct ppc_dyn_relocs **)
4776 &elf_section_data (s)->local_dynrel);
4777 }
4778
4779 p = *head;
4780 if (p == NULL || p->sec != sec)
4781 {
4782 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4783 if (p == NULL)
4784 return FALSE;
4785 p->next = *head;
4786 *head = p;
4787 p->sec = sec;
4788 p->count = 0;
4789 p->pc_count = 0;
4790 }
4791
4792 p->count += 1;
4793 if (!MUST_BE_DYN_RELOC (r_type))
4794 p->pc_count += 1;
4795 }
4796 break;
4797
4798 default:
4799 break;
4800 }
4801 }
4802
4803 return TRUE;
4804 }
4805
4806 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4807 of the code entry point, and its section. */
4808
4809 static bfd_vma
4810 opd_entry_value (asection *opd_sec,
4811 bfd_vma offset,
4812 asection **code_sec,
4813 bfd_vma *code_off)
4814 {
4815 bfd *opd_bfd = opd_sec->owner;
4816 Elf_Internal_Rela *relocs;
4817 Elf_Internal_Rela *lo, *hi, *look;
4818 bfd_vma val;
4819
4820 /* No relocs implies we are linking a --just-symbols object. */
4821 if (opd_sec->reloc_count == 0)
4822 {
4823 bfd_vma val;
4824
4825 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4826 return (bfd_vma) -1;
4827
4828 if (code_sec != NULL)
4829 {
4830 asection *sec, *likely = NULL;
4831 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4832 if (sec->vma <= val
4833 && (sec->flags & SEC_LOAD) != 0
4834 && (sec->flags & SEC_ALLOC) != 0)
4835 likely = sec;
4836 if (likely != NULL)
4837 {
4838 *code_sec = likely;
4839 if (code_off != NULL)
4840 *code_off = val - likely->vma;
4841 }
4842 }
4843 return val;
4844 }
4845
4846 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4847 if (relocs == NULL)
4848 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4849
4850 /* Go find the opd reloc at the sym address. */
4851 lo = relocs;
4852 BFD_ASSERT (lo != NULL);
4853 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4854 val = (bfd_vma) -1;
4855 while (lo < hi)
4856 {
4857 look = lo + (hi - lo) / 2;
4858 if (look->r_offset < offset)
4859 lo = look + 1;
4860 else if (look->r_offset > offset)
4861 hi = look;
4862 else
4863 {
4864 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4865 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4866 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4867 {
4868 unsigned long symndx = ELF64_R_SYM (look->r_info);
4869 asection *sec;
4870
4871 if (symndx < symtab_hdr->sh_info)
4872 {
4873 Elf_Internal_Sym *sym;
4874
4875 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4876 if (sym == NULL)
4877 {
4878 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4879 symtab_hdr->sh_info,
4880 0, NULL, NULL, NULL);
4881 if (sym == NULL)
4882 break;
4883 symtab_hdr->contents = (bfd_byte *) sym;
4884 }
4885
4886 sym += symndx;
4887 val = sym->st_value;
4888 sec = NULL;
4889 if ((sym->st_shndx != SHN_UNDEF
4890 && sym->st_shndx < SHN_LORESERVE)
4891 || sym->st_shndx > SHN_HIRESERVE)
4892 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4893 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4894 }
4895 else
4896 {
4897 struct elf_link_hash_entry **sym_hashes;
4898 struct elf_link_hash_entry *rh;
4899
4900 sym_hashes = elf_sym_hashes (opd_bfd);
4901 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4902 while (rh->root.type == bfd_link_hash_indirect
4903 || rh->root.type == bfd_link_hash_warning)
4904 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4905 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4906 || rh->root.type == bfd_link_hash_defweak);
4907 val = rh->root.u.def.value;
4908 sec = rh->root.u.def.section;
4909 }
4910 val += look->r_addend;
4911 if (code_off != NULL)
4912 *code_off = val;
4913 if (code_sec != NULL)
4914 *code_sec = sec;
4915 if (sec != NULL && sec->output_section != NULL)
4916 val += sec->output_section->vma + sec->output_offset;
4917 }
4918 break;
4919 }
4920 }
4921
4922 return val;
4923 }
4924
4925 /* Return the section that should be marked against GC for a given
4926 relocation. */
4927
4928 static asection *
4929 ppc64_elf_gc_mark_hook (asection *sec,
4930 struct bfd_link_info *info,
4931 Elf_Internal_Rela *rel,
4932 struct elf_link_hash_entry *h,
4933 Elf_Internal_Sym *sym)
4934 {
4935 asection *rsec;
4936
4937 /* First mark all our entry sym sections. */
4938 if (info->gc_sym_list != NULL)
4939 {
4940 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4941 struct bfd_sym_chain *sym = info->gc_sym_list;
4942
4943 info->gc_sym_list = NULL;
4944 do
4945 {
4946 struct ppc_link_hash_entry *eh;
4947
4948 eh = (struct ppc_link_hash_entry *)
4949 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4950 if (eh == NULL)
4951 continue;
4952 if (eh->elf.root.type != bfd_link_hash_defined
4953 && eh->elf.root.type != bfd_link_hash_defweak)
4954 continue;
4955
4956 if (eh->is_func_descriptor
4957 && (eh->oh->elf.root.type == bfd_link_hash_defined
4958 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4959 rsec = eh->oh->elf.root.u.def.section;
4960 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4961 && opd_entry_value (eh->elf.root.u.def.section,
4962 eh->elf.root.u.def.value,
4963 &rsec, NULL) != (bfd_vma) -1)
4964 ;
4965 else
4966 continue;
4967
4968 if (!rsec->gc_mark)
4969 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4970
4971 rsec = eh->elf.root.u.def.section;
4972 if (!rsec->gc_mark)
4973 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4974
4975 sym = sym->next;
4976 }
4977 while (sym != NULL);
4978 }
4979
4980 /* Syms return NULL if we're marking .opd, so we avoid marking all
4981 function sections, as all functions are referenced in .opd. */
4982 rsec = NULL;
4983 if (get_opd_info (sec) != NULL)
4984 return rsec;
4985
4986 if (h != NULL)
4987 {
4988 enum elf_ppc64_reloc_type r_type;
4989 struct ppc_link_hash_entry *eh;
4990
4991 r_type = ELF64_R_TYPE (rel->r_info);
4992 switch (r_type)
4993 {
4994 case R_PPC64_GNU_VTINHERIT:
4995 case R_PPC64_GNU_VTENTRY:
4996 break;
4997
4998 default:
4999 switch (h->root.type)
5000 {
5001 case bfd_link_hash_defined:
5002 case bfd_link_hash_defweak:
5003 eh = (struct ppc_link_hash_entry *) h;
5004 if (eh->oh != NULL
5005 && eh->oh->is_func_descriptor
5006 && (eh->oh->elf.root.type == bfd_link_hash_defined
5007 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5008 eh = eh->oh;
5009
5010 /* Function descriptor syms cause the associated
5011 function code sym section to be marked. */
5012 if (eh->is_func_descriptor
5013 && (eh->oh->elf.root.type == bfd_link_hash_defined
5014 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5015 {
5016 /* They also mark their opd section. */
5017 if (!eh->elf.root.u.def.section->gc_mark)
5018 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5019 ppc64_elf_gc_mark_hook);
5020
5021 rsec = eh->oh->elf.root.u.def.section;
5022 }
5023 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5024 && opd_entry_value (eh->elf.root.u.def.section,
5025 eh->elf.root.u.def.value,
5026 &rsec, NULL) != (bfd_vma) -1)
5027 {
5028 if (!eh->elf.root.u.def.section->gc_mark)
5029 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5030 ppc64_elf_gc_mark_hook);
5031 }
5032 else
5033 rsec = h->root.u.def.section;
5034 break;
5035
5036 case bfd_link_hash_common:
5037 rsec = h->root.u.c.p->section;
5038 break;
5039
5040 default:
5041 break;
5042 }
5043 }
5044 }
5045 else
5046 {
5047 asection **opd_sym_section;
5048
5049 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5050 opd_sym_section = get_opd_info (rsec);
5051 if (opd_sym_section != NULL)
5052 {
5053 if (!rsec->gc_mark)
5054 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5055
5056 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5057 }
5058 }
5059
5060 return rsec;
5061 }
5062
5063 /* Update the .got, .plt. and dynamic reloc reference counts for the
5064 section being removed. */
5065
5066 static bfd_boolean
5067 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5068 asection *sec, const Elf_Internal_Rela *relocs)
5069 {
5070 struct ppc_link_hash_table *htab;
5071 Elf_Internal_Shdr *symtab_hdr;
5072 struct elf_link_hash_entry **sym_hashes;
5073 struct got_entry **local_got_ents;
5074 const Elf_Internal_Rela *rel, *relend;
5075
5076 if ((sec->flags & SEC_ALLOC) == 0)
5077 return TRUE;
5078
5079 elf_section_data (sec)->local_dynrel = NULL;
5080
5081 htab = ppc_hash_table (info);
5082 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5083 sym_hashes = elf_sym_hashes (abfd);
5084 local_got_ents = elf_local_got_ents (abfd);
5085
5086 relend = relocs + sec->reloc_count;
5087 for (rel = relocs; rel < relend; rel++)
5088 {
5089 unsigned long r_symndx;
5090 enum elf_ppc64_reloc_type r_type;
5091 struct elf_link_hash_entry *h = NULL;
5092 char tls_type = 0;
5093
5094 r_symndx = ELF64_R_SYM (rel->r_info);
5095 r_type = ELF64_R_TYPE (rel->r_info);
5096 if (r_symndx >= symtab_hdr->sh_info)
5097 {
5098 struct ppc_link_hash_entry *eh;
5099 struct ppc_dyn_relocs **pp;
5100 struct ppc_dyn_relocs *p;
5101
5102 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5103 while (h->root.type == bfd_link_hash_indirect
5104 || h->root.type == bfd_link_hash_warning)
5105 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5106 eh = (struct ppc_link_hash_entry *) h;
5107
5108 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5109 if (p->sec == sec)
5110 {
5111 /* Everything must go for SEC. */
5112 *pp = p->next;
5113 break;
5114 }
5115 }
5116
5117 switch (r_type)
5118 {
5119 case R_PPC64_GOT_TLSLD16:
5120 case R_PPC64_GOT_TLSLD16_LO:
5121 case R_PPC64_GOT_TLSLD16_HI:
5122 case R_PPC64_GOT_TLSLD16_HA:
5123 ppc64_tlsld_got (abfd)->refcount -= 1;
5124 tls_type = TLS_TLS | TLS_LD;
5125 goto dogot;
5126
5127 case R_PPC64_GOT_TLSGD16:
5128 case R_PPC64_GOT_TLSGD16_LO:
5129 case R_PPC64_GOT_TLSGD16_HI:
5130 case R_PPC64_GOT_TLSGD16_HA:
5131 tls_type = TLS_TLS | TLS_GD;
5132 goto dogot;
5133
5134 case R_PPC64_GOT_TPREL16_DS:
5135 case R_PPC64_GOT_TPREL16_LO_DS:
5136 case R_PPC64_GOT_TPREL16_HI:
5137 case R_PPC64_GOT_TPREL16_HA:
5138 tls_type = TLS_TLS | TLS_TPREL;
5139 goto dogot;
5140
5141 case R_PPC64_GOT_DTPREL16_DS:
5142 case R_PPC64_GOT_DTPREL16_LO_DS:
5143 case R_PPC64_GOT_DTPREL16_HI:
5144 case R_PPC64_GOT_DTPREL16_HA:
5145 tls_type = TLS_TLS | TLS_DTPREL;
5146 goto dogot;
5147
5148 case R_PPC64_GOT16:
5149 case R_PPC64_GOT16_DS:
5150 case R_PPC64_GOT16_HA:
5151 case R_PPC64_GOT16_HI:
5152 case R_PPC64_GOT16_LO:
5153 case R_PPC64_GOT16_LO_DS:
5154 dogot:
5155 {
5156 struct got_entry *ent;
5157
5158 if (h != NULL)
5159 ent = h->got.glist;
5160 else
5161 ent = local_got_ents[r_symndx];
5162
5163 for (; ent != NULL; ent = ent->next)
5164 if (ent->addend == rel->r_addend
5165 && ent->owner == abfd
5166 && ent->tls_type == tls_type)
5167 break;
5168 if (ent == NULL)
5169 abort ();
5170 if (ent->got.refcount > 0)
5171 ent->got.refcount -= 1;
5172 }
5173 break;
5174
5175 case R_PPC64_PLT16_HA:
5176 case R_PPC64_PLT16_HI:
5177 case R_PPC64_PLT16_LO:
5178 case R_PPC64_PLT32:
5179 case R_PPC64_PLT64:
5180 case R_PPC64_REL14:
5181 case R_PPC64_REL14_BRNTAKEN:
5182 case R_PPC64_REL14_BRTAKEN:
5183 case R_PPC64_REL24:
5184 if (h != NULL)
5185 {
5186 struct plt_entry *ent;
5187
5188 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5189 if (ent->addend == rel->r_addend)
5190 break;
5191 if (ent == NULL)
5192 abort ();
5193 if (ent->plt.refcount > 0)
5194 ent->plt.refcount -= 1;
5195 }
5196 break;
5197
5198 default:
5199 break;
5200 }
5201 }
5202 return TRUE;
5203 }
5204
5205 /* The maximum size of .sfpr. */
5206 #define SFPR_MAX (218*4)
5207
5208 struct sfpr_def_parms
5209 {
5210 const char name[12];
5211 unsigned char lo, hi;
5212 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5213 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5214 };
5215
5216 /* Auto-generate _save*, _rest* functions in .sfpr. */
5217
5218 static unsigned int
5219 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5220 {
5221 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5222 unsigned int i;
5223 size_t len = strlen (parm->name);
5224 bfd_boolean writing = FALSE;
5225 char sym[16];
5226
5227 memcpy (sym, parm->name, len);
5228 sym[len + 2] = 0;
5229
5230 for (i = parm->lo; i <= parm->hi; i++)
5231 {
5232 struct elf_link_hash_entry *h;
5233
5234 sym[len + 0] = i / 10 + '0';
5235 sym[len + 1] = i % 10 + '0';
5236 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5237 if (h != NULL
5238 && !h->def_regular)
5239 {
5240 h->root.type = bfd_link_hash_defined;
5241 h->root.u.def.section = htab->sfpr;
5242 h->root.u.def.value = htab->sfpr->size;
5243 h->type = STT_FUNC;
5244 h->def_regular = 1;
5245 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5246 writing = TRUE;
5247 if (htab->sfpr->contents == NULL)
5248 {
5249 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5250 if (htab->sfpr->contents == NULL)
5251 return FALSE;
5252 }
5253 }
5254 if (writing)
5255 {
5256 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5257 if (i != parm->hi)
5258 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5259 else
5260 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5261 htab->sfpr->size = p - htab->sfpr->contents;
5262 }
5263 }
5264
5265 return TRUE;
5266 }
5267
5268 static bfd_byte *
5269 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5270 {
5271 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5272 return p + 4;
5273 }
5274
5275 static bfd_byte *
5276 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5277 {
5278 p = savegpr0 (abfd, p, r);
5279 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5280 p = p + 4;
5281 bfd_put_32 (abfd, BLR, p);
5282 return p + 4;
5283 }
5284
5285 static bfd_byte *
5286 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5287 {
5288 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5289 return p + 4;
5290 }
5291
5292 static bfd_byte *
5293 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5294 {
5295 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5296 p = p + 4;
5297 p = restgpr0 (abfd, p, r);
5298 bfd_put_32 (abfd, MTLR_R0, p);
5299 p = p + 4;
5300 if (r == 29)
5301 {
5302 p = restgpr0 (abfd, p, 30);
5303 p = restgpr0 (abfd, p, 31);
5304 }
5305 bfd_put_32 (abfd, BLR, p);
5306 return p + 4;
5307 }
5308
5309 static bfd_byte *
5310 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5311 {
5312 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5313 return p + 4;
5314 }
5315
5316 static bfd_byte *
5317 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5318 {
5319 p = savegpr1 (abfd, p, r);
5320 bfd_put_32 (abfd, BLR, p);
5321 return p + 4;
5322 }
5323
5324 static bfd_byte *
5325 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5326 {
5327 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5328 return p + 4;
5329 }
5330
5331 static bfd_byte *
5332 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5333 {
5334 p = restgpr1 (abfd, p, r);
5335 bfd_put_32 (abfd, BLR, p);
5336 return p + 4;
5337 }
5338
5339 static bfd_byte *
5340 savefpr (bfd *abfd, bfd_byte *p, int r)
5341 {
5342 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5343 return p + 4;
5344 }
5345
5346 static bfd_byte *
5347 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5348 {
5349 p = savefpr (abfd, p, r);
5350 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5351 p = p + 4;
5352 bfd_put_32 (abfd, BLR, p);
5353 return p + 4;
5354 }
5355
5356 static bfd_byte *
5357 restfpr (bfd *abfd, bfd_byte *p, int r)
5358 {
5359 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5360 return p + 4;
5361 }
5362
5363 static bfd_byte *
5364 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5365 {
5366 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5367 p = p + 4;
5368 p = restfpr (abfd, p, r);
5369 bfd_put_32 (abfd, MTLR_R0, p);
5370 p = p + 4;
5371 if (r == 29)
5372 {
5373 p = restfpr (abfd, p, 30);
5374 p = restfpr (abfd, p, 31);
5375 }
5376 bfd_put_32 (abfd, BLR, p);
5377 return p + 4;
5378 }
5379
5380 static bfd_byte *
5381 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5382 {
5383 p = savefpr (abfd, p, r);
5384 bfd_put_32 (abfd, BLR, p);
5385 return p + 4;
5386 }
5387
5388 static bfd_byte *
5389 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5390 {
5391 p = restfpr (abfd, p, r);
5392 bfd_put_32 (abfd, BLR, p);
5393 return p + 4;
5394 }
5395
5396 static bfd_byte *
5397 savevr (bfd *abfd, bfd_byte *p, int r)
5398 {
5399 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5400 p = p + 4;
5401 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5402 return p + 4;
5403 }
5404
5405 static bfd_byte *
5406 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5407 {
5408 p = savevr (abfd, p, r);
5409 bfd_put_32 (abfd, BLR, p);
5410 return p + 4;
5411 }
5412
5413 static bfd_byte *
5414 restvr (bfd *abfd, bfd_byte *p, int r)
5415 {
5416 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5417 p = p + 4;
5418 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5419 return p + 4;
5420 }
5421
5422 static bfd_byte *
5423 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5424 {
5425 p = restvr (abfd, p, r);
5426 bfd_put_32 (abfd, BLR, p);
5427 return p + 4;
5428 }
5429
5430 /* Called via elf_link_hash_traverse to transfer dynamic linking
5431 information on function code symbol entries to their corresponding
5432 function descriptor symbol entries. */
5433
5434 static bfd_boolean
5435 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5436 {
5437 struct bfd_link_info *info;
5438 struct ppc_link_hash_table *htab;
5439 struct plt_entry *ent;
5440 struct ppc_link_hash_entry *fh;
5441 struct ppc_link_hash_entry *fdh;
5442 bfd_boolean force_local;
5443
5444 fh = (struct ppc_link_hash_entry *) h;
5445 if (fh->elf.root.type == bfd_link_hash_indirect)
5446 return TRUE;
5447
5448 if (fh->elf.root.type == bfd_link_hash_warning)
5449 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5450
5451 info = inf;
5452 htab = ppc_hash_table (info);
5453
5454 /* Resolve undefined references to dot-symbols as the value
5455 in the function descriptor, if we have one in a regular object.
5456 This is to satisfy cases like ".quad .foo". Calls to functions
5457 in dynamic objects are handled elsewhere. */
5458 if (fh->elf.root.type == bfd_link_hash_undefweak
5459 && fh->was_undefined
5460 && (fh->oh->elf.root.type == bfd_link_hash_defined
5461 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5462 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5463 && opd_entry_value (fh->oh->elf.root.u.def.section,
5464 fh->oh->elf.root.u.def.value,
5465 &fh->elf.root.u.def.section,
5466 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5467 {
5468 fh->elf.root.type = fh->oh->elf.root.type;
5469 fh->elf.forced_local = 1;
5470 }
5471
5472 /* If this is a function code symbol, transfer dynamic linking
5473 information to the function descriptor symbol. */
5474 if (!fh->is_func)
5475 return TRUE;
5476
5477 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5478 if (ent->plt.refcount > 0)
5479 break;
5480 if (ent == NULL
5481 || fh->elf.root.root.string[0] != '.'
5482 || fh->elf.root.root.string[1] == '\0')
5483 return TRUE;
5484
5485 /* Find the corresponding function descriptor symbol. Create it
5486 as undefined if necessary. */
5487
5488 fdh = get_fdh (fh, htab);
5489 if (fdh != NULL)
5490 while (fdh->elf.root.type == bfd_link_hash_indirect
5491 || fdh->elf.root.type == bfd_link_hash_warning)
5492 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5493
5494 if (fdh == NULL
5495 && info->shared
5496 && (fh->elf.root.type == bfd_link_hash_undefined
5497 || fh->elf.root.type == bfd_link_hash_undefweak))
5498 {
5499 fdh = make_fdh (info, fh);
5500 if (fdh == NULL)
5501 return FALSE;
5502 }
5503
5504 /* Fake function descriptors are made undefweak. If the function
5505 code symbol is strong undefined, make the fake sym the same.
5506 If the function code symbol is defined, then force the fake
5507 descriptor local; We can't support overriding of symbols in a
5508 shared library on a fake descriptor. */
5509
5510 if (fdh != NULL
5511 && fdh->fake
5512 && fdh->elf.root.type == bfd_link_hash_undefweak)
5513 {
5514 if (fh->elf.root.type == bfd_link_hash_undefined)
5515 {
5516 fdh->elf.root.type = bfd_link_hash_undefined;
5517 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5518 }
5519 else if (fh->elf.root.type == bfd_link_hash_defined
5520 || fh->elf.root.type == bfd_link_hash_defweak)
5521 {
5522 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5523 }
5524 }
5525
5526 if (fdh != NULL
5527 && !fdh->elf.forced_local
5528 && (info->shared
5529 || fdh->elf.def_dynamic
5530 || fdh->elf.ref_dynamic
5531 || (fdh->elf.root.type == bfd_link_hash_undefweak
5532 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5533 {
5534 if (fdh->elf.dynindx == -1)
5535 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5536 return FALSE;
5537 fdh->elf.ref_regular |= fh->elf.ref_regular;
5538 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5539 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5540 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5541 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5542 {
5543 move_plt_plist (fh, fdh);
5544 fdh->elf.needs_plt = 1;
5545 }
5546 fdh->is_func_descriptor = 1;
5547 fdh->oh = fh;
5548 fh->oh = fdh;
5549 }
5550
5551 /* Now that the info is on the function descriptor, clear the
5552 function code sym info. Any function code syms for which we
5553 don't have a definition in a regular file, we force local.
5554 This prevents a shared library from exporting syms that have
5555 been imported from another library. Function code syms that
5556 are really in the library we must leave global to prevent the
5557 linker dragging in a definition from a static library. */
5558 force_local = (!fh->elf.def_regular
5559 || fdh == NULL
5560 || !fdh->elf.def_regular
5561 || fdh->elf.forced_local);
5562 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5563
5564 return TRUE;
5565 }
5566
5567 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5568 this hook to a) provide some gcc support functions, and b) transfer
5569 dynamic linking information gathered so far on function code symbol
5570 entries, to their corresponding function descriptor symbol entries. */
5571
5572 static bfd_boolean
5573 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5574 struct bfd_link_info *info)
5575 {
5576 struct ppc_link_hash_table *htab;
5577 unsigned int i;
5578 const struct sfpr_def_parms funcs[] =
5579 {
5580 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5581 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5582 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5583 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5584 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5585 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5586 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5587 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5588 { "._savef", 14, 31, savefpr, savefpr1_tail },
5589 { "._restf", 14, 31, restfpr, restfpr1_tail },
5590 { "_savevr_", 20, 31, savevr, savevr_tail },
5591 { "_restvr_", 20, 31, restvr, restvr_tail }
5592 };
5593
5594 htab = ppc_hash_table (info);
5595 if (htab->sfpr == NULL)
5596 /* We don't have any relocs. */
5597 return TRUE;
5598
5599 /* Provide any missing _save* and _rest* functions. */
5600 htab->sfpr->size = 0;
5601 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5602 if (!sfpr_define (info, &funcs[i]))
5603 return FALSE;
5604
5605 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5606
5607 if (htab->sfpr->size == 0)
5608 htab->sfpr->flags |= SEC_EXCLUDE;
5609
5610 return TRUE;
5611 }
5612
5613 /* Adjust a symbol defined by a dynamic object and referenced by a
5614 regular object. The current definition is in some section of the
5615 dynamic object, but we're not including those sections. We have to
5616 change the definition to something the rest of the link can
5617 understand. */
5618
5619 static bfd_boolean
5620 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5621 struct elf_link_hash_entry *h)
5622 {
5623 struct ppc_link_hash_table *htab;
5624 asection *s;
5625 unsigned int power_of_two;
5626
5627 htab = ppc_hash_table (info);
5628
5629 /* Deal with function syms. */
5630 if (h->type == STT_FUNC
5631 || h->needs_plt)
5632 {
5633 /* Clear procedure linkage table information for any symbol that
5634 won't need a .plt entry. */
5635 struct plt_entry *ent;
5636 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5637 if (ent->plt.refcount > 0)
5638 break;
5639 if (ent == NULL
5640 || SYMBOL_CALLS_LOCAL (info, h)
5641 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5642 && h->root.type == bfd_link_hash_undefweak))
5643 {
5644 h->plt.plist = NULL;
5645 h->needs_plt = 0;
5646 }
5647 }
5648 else
5649 h->plt.plist = NULL;
5650
5651 /* If this is a weak symbol, and there is a real definition, the
5652 processor independent code will have arranged for us to see the
5653 real definition first, and we can just use the same value. */
5654 if (h->u.weakdef != NULL)
5655 {
5656 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5657 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5658 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5659 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5660 if (ELIMINATE_COPY_RELOCS)
5661 h->non_got_ref = h->u.weakdef->non_got_ref;
5662 return TRUE;
5663 }
5664
5665 /* If we are creating a shared library, we must presume that the
5666 only references to the symbol are via the global offset table.
5667 For such cases we need not do anything here; the relocations will
5668 be handled correctly by relocate_section. */
5669 if (info->shared)
5670 return TRUE;
5671
5672 /* If there are no references to this symbol that do not use the
5673 GOT, we don't need to generate a copy reloc. */
5674 if (!h->non_got_ref)
5675 return TRUE;
5676
5677 if (ELIMINATE_COPY_RELOCS)
5678 {
5679 struct ppc_link_hash_entry * eh;
5680 struct ppc_dyn_relocs *p;
5681
5682 eh = (struct ppc_link_hash_entry *) h;
5683 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5684 {
5685 s = p->sec->output_section;
5686 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5687 break;
5688 }
5689
5690 /* If we didn't find any dynamic relocs in read-only sections, then
5691 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5692 if (p == NULL)
5693 {
5694 h->non_got_ref = 0;
5695 return TRUE;
5696 }
5697 }
5698
5699 if (h->plt.plist != NULL)
5700 {
5701 /* We should never get here, but unfortunately there are versions
5702 of gcc out there that improperly (for this ABI) put initialized
5703 function pointers, vtable refs and suchlike in read-only
5704 sections. Allow them to proceed, but warn that this might
5705 break at runtime. */
5706 (*_bfd_error_handler)
5707 (_("copy reloc against `%s' requires lazy plt linking; "
5708 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5709 h->root.root.string);
5710 }
5711
5712 /* This is a reference to a symbol defined by a dynamic object which
5713 is not a function. */
5714
5715 if (h->size == 0)
5716 {
5717 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5718 h->root.root.string);
5719 return TRUE;
5720 }
5721
5722 /* We must allocate the symbol in our .dynbss section, which will
5723 become part of the .bss section of the executable. There will be
5724 an entry for this symbol in the .dynsym section. The dynamic
5725 object will contain position independent code, so all references
5726 from the dynamic object to this symbol will go through the global
5727 offset table. The dynamic linker will use the .dynsym entry to
5728 determine the address it must put in the global offset table, so
5729 both the dynamic object and the regular object will refer to the
5730 same memory location for the variable. */
5731
5732 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5733 to copy the initial value out of the dynamic object and into the
5734 runtime process image. We need to remember the offset into the
5735 .rela.bss section we are going to use. */
5736 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5737 {
5738 htab->relbss->size += sizeof (Elf64_External_Rela);
5739 h->needs_copy = 1;
5740 }
5741
5742 /* We need to figure out the alignment required for this symbol. I
5743 have no idea how ELF linkers handle this. */
5744 power_of_two = bfd_log2 (h->size);
5745 if (power_of_two > 4)
5746 power_of_two = 4;
5747
5748 /* Apply the required alignment. */
5749 s = htab->dynbss;
5750 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5751 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5752 {
5753 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5754 return FALSE;
5755 }
5756
5757 /* Define the symbol as being at this point in the section. */
5758 h->root.u.def.section = s;
5759 h->root.u.def.value = s->size;
5760
5761 /* Increment the section size to make room for the symbol. */
5762 s->size += h->size;
5763
5764 return TRUE;
5765 }
5766
5767 /* If given a function descriptor symbol, hide both the function code
5768 sym and the descriptor. */
5769 static void
5770 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5771 struct elf_link_hash_entry *h,
5772 bfd_boolean force_local)
5773 {
5774 struct ppc_link_hash_entry *eh;
5775 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5776
5777 eh = (struct ppc_link_hash_entry *) h;
5778 if (eh->is_func_descriptor)
5779 {
5780 struct ppc_link_hash_entry *fh = eh->oh;
5781
5782 if (fh == NULL)
5783 {
5784 const char *p, *q;
5785 struct ppc_link_hash_table *htab;
5786 char save;
5787
5788 /* We aren't supposed to use alloca in BFD because on
5789 systems which do not have alloca the version in libiberty
5790 calls xmalloc, which might cause the program to crash
5791 when it runs out of memory. This function doesn't have a
5792 return status, so there's no way to gracefully return an
5793 error. So cheat. We know that string[-1] can be safely
5794 accessed; It's either a string in an ELF string table,
5795 or allocated in an objalloc structure. */
5796
5797 p = eh->elf.root.root.string - 1;
5798 save = *p;
5799 *(char *) p = '.';
5800 htab = ppc_hash_table (info);
5801 fh = (struct ppc_link_hash_entry *)
5802 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5803 *(char *) p = save;
5804
5805 /* Unfortunately, if it so happens that the string we were
5806 looking for was allocated immediately before this string,
5807 then we overwrote the string terminator. That's the only
5808 reason the lookup should fail. */
5809 if (fh == NULL)
5810 {
5811 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5812 while (q >= eh->elf.root.root.string && *q == *p)
5813 --q, --p;
5814 if (q < eh->elf.root.root.string && *p == '.')
5815 fh = (struct ppc_link_hash_entry *)
5816 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5817 }
5818 if (fh != NULL)
5819 {
5820 eh->oh = fh;
5821 fh->oh = eh;
5822 }
5823 }
5824 if (fh != NULL)
5825 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5826 }
5827 }
5828
5829 static bfd_boolean
5830 get_sym_h (struct elf_link_hash_entry **hp,
5831 Elf_Internal_Sym **symp,
5832 asection **symsecp,
5833 char **tls_maskp,
5834 Elf_Internal_Sym **locsymsp,
5835 unsigned long r_symndx,
5836 bfd *ibfd)
5837 {
5838 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5839
5840 if (r_symndx >= symtab_hdr->sh_info)
5841 {
5842 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5843 struct elf_link_hash_entry *h;
5844
5845 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5846 while (h->root.type == bfd_link_hash_indirect
5847 || h->root.type == bfd_link_hash_warning)
5848 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5849
5850 if (hp != NULL)
5851 *hp = h;
5852
5853 if (symp != NULL)
5854 *symp = NULL;
5855
5856 if (symsecp != NULL)
5857 {
5858 asection *symsec = NULL;
5859 if (h->root.type == bfd_link_hash_defined
5860 || h->root.type == bfd_link_hash_defweak)
5861 symsec = h->root.u.def.section;
5862 *symsecp = symsec;
5863 }
5864
5865 if (tls_maskp != NULL)
5866 {
5867 struct ppc_link_hash_entry *eh;
5868
5869 eh = (struct ppc_link_hash_entry *) h;
5870 *tls_maskp = &eh->tls_mask;
5871 }
5872 }
5873 else
5874 {
5875 Elf_Internal_Sym *sym;
5876 Elf_Internal_Sym *locsyms = *locsymsp;
5877
5878 if (locsyms == NULL)
5879 {
5880 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5881 if (locsyms == NULL)
5882 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5883 symtab_hdr->sh_info,
5884 0, NULL, NULL, NULL);
5885 if (locsyms == NULL)
5886 return FALSE;
5887 *locsymsp = locsyms;
5888 }
5889 sym = locsyms + r_symndx;
5890
5891 if (hp != NULL)
5892 *hp = NULL;
5893
5894 if (symp != NULL)
5895 *symp = sym;
5896
5897 if (symsecp != NULL)
5898 {
5899 asection *symsec = NULL;
5900 if ((sym->st_shndx != SHN_UNDEF
5901 && sym->st_shndx < SHN_LORESERVE)
5902 || sym->st_shndx > SHN_HIRESERVE)
5903 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5904 *symsecp = symsec;
5905 }
5906
5907 if (tls_maskp != NULL)
5908 {
5909 struct got_entry **lgot_ents;
5910 char *tls_mask;
5911
5912 tls_mask = NULL;
5913 lgot_ents = elf_local_got_ents (ibfd);
5914 if (lgot_ents != NULL)
5915 {
5916 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5917 tls_mask = &lgot_masks[r_symndx];
5918 }
5919 *tls_maskp = tls_mask;
5920 }
5921 }
5922 return TRUE;
5923 }
5924
5925 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5926 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5927 type suitable for optimization, and 1 otherwise. */
5928
5929 static int
5930 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5931 Elf_Internal_Sym **locsymsp,
5932 const Elf_Internal_Rela *rel, bfd *ibfd)
5933 {
5934 unsigned long r_symndx;
5935 int next_r;
5936 struct elf_link_hash_entry *h;
5937 Elf_Internal_Sym *sym;
5938 asection *sec;
5939 bfd_vma off;
5940
5941 r_symndx = ELF64_R_SYM (rel->r_info);
5942 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5943 return 0;
5944
5945 if ((*tls_maskp != NULL && **tls_maskp != 0)
5946 || sec == NULL
5947 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5948 return 1;
5949
5950 /* Look inside a TOC section too. */
5951 if (h != NULL)
5952 {
5953 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5954 off = h->root.u.def.value;
5955 }
5956 else
5957 off = sym->st_value;
5958 off += rel->r_addend;
5959 BFD_ASSERT (off % 8 == 0);
5960 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5961 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5962 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5963 return 0;
5964 if (toc_symndx != NULL)
5965 *toc_symndx = r_symndx;
5966 if ((h == NULL
5967 || ((h->root.type == bfd_link_hash_defined
5968 || h->root.type == bfd_link_hash_defweak)
5969 && !h->def_dynamic))
5970 && (next_r == -1 || next_r == -2))
5971 return 1 - next_r;
5972 return 1;
5973 }
5974
5975 /* Adjust all global syms defined in opd sections. In gcc generated
5976 code for the old ABI, these will already have been done. */
5977
5978 static bfd_boolean
5979 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5980 {
5981 struct ppc_link_hash_entry *eh;
5982 asection *sym_sec;
5983 long *opd_adjust;
5984
5985 if (h->root.type == bfd_link_hash_indirect)
5986 return TRUE;
5987
5988 if (h->root.type == bfd_link_hash_warning)
5989 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5990
5991 if (h->root.type != bfd_link_hash_defined
5992 && h->root.type != bfd_link_hash_defweak)
5993 return TRUE;
5994
5995 eh = (struct ppc_link_hash_entry *) h;
5996 if (eh->adjust_done)
5997 return TRUE;
5998
5999 sym_sec = eh->elf.root.u.def.section;
6000 opd_adjust = get_opd_info (sym_sec);
6001 if (opd_adjust != NULL)
6002 {
6003 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6004 if (adjust == -1)
6005 {
6006 /* This entry has been deleted. */
6007 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->u.deleted_section;
6008 if (dsec == NULL)
6009 {
6010 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6011 if (elf_discarded_section (dsec))
6012 {
6013 ppc64_elf_tdata (sym_sec->owner)->u.deleted_section = dsec;
6014 break;
6015 }
6016 }
6017 eh->elf.root.u.def.value = 0;
6018 eh->elf.root.u.def.section = dsec;
6019 }
6020 else
6021 eh->elf.root.u.def.value += adjust;
6022 eh->adjust_done = 1;
6023 }
6024 return TRUE;
6025 }
6026
6027 /* Handles decrementing dynamic reloc counts for the reloc specified by
6028 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6029 have already been determined. */
6030
6031 static bfd_boolean
6032 dec_dynrel_count (bfd_vma r_info,
6033 asection *sec,
6034 struct bfd_link_info *info,
6035 Elf_Internal_Sym **local_syms,
6036 struct elf_link_hash_entry *h,
6037 asection *sym_sec)
6038 {
6039 enum elf_ppc64_reloc_type r_type;
6040 struct ppc_dyn_relocs *p;
6041 struct ppc_dyn_relocs **pp;
6042
6043 /* Can this reloc be dynamic? This switch, and later tests here
6044 should be kept in sync with the code in check_relocs. */
6045 r_type = ELF64_R_TYPE (r_info);
6046 switch (r_type)
6047 {
6048 default:
6049 return TRUE;
6050
6051 case R_PPC64_TPREL16:
6052 case R_PPC64_TPREL16_LO:
6053 case R_PPC64_TPREL16_HI:
6054 case R_PPC64_TPREL16_HA:
6055 case R_PPC64_TPREL16_DS:
6056 case R_PPC64_TPREL16_LO_DS:
6057 case R_PPC64_TPREL16_HIGHER:
6058 case R_PPC64_TPREL16_HIGHERA:
6059 case R_PPC64_TPREL16_HIGHEST:
6060 case R_PPC64_TPREL16_HIGHESTA:
6061 if (!info->shared)
6062 return TRUE;
6063
6064 case R_PPC64_TPREL64:
6065 case R_PPC64_DTPMOD64:
6066 case R_PPC64_DTPREL64:
6067 case R_PPC64_ADDR64:
6068 case R_PPC64_REL30:
6069 case R_PPC64_REL32:
6070 case R_PPC64_REL64:
6071 case R_PPC64_ADDR14:
6072 case R_PPC64_ADDR14_BRNTAKEN:
6073 case R_PPC64_ADDR14_BRTAKEN:
6074 case R_PPC64_ADDR16:
6075 case R_PPC64_ADDR16_DS:
6076 case R_PPC64_ADDR16_HA:
6077 case R_PPC64_ADDR16_HI:
6078 case R_PPC64_ADDR16_HIGHER:
6079 case R_PPC64_ADDR16_HIGHERA:
6080 case R_PPC64_ADDR16_HIGHEST:
6081 case R_PPC64_ADDR16_HIGHESTA:
6082 case R_PPC64_ADDR16_LO:
6083 case R_PPC64_ADDR16_LO_DS:
6084 case R_PPC64_ADDR24:
6085 case R_PPC64_ADDR32:
6086 case R_PPC64_UADDR16:
6087 case R_PPC64_UADDR32:
6088 case R_PPC64_UADDR64:
6089 case R_PPC64_TOC:
6090 break;
6091 }
6092
6093 if (local_syms != NULL)
6094 {
6095 unsigned long r_symndx;
6096 Elf_Internal_Sym *sym;
6097 bfd *ibfd = sec->owner;
6098
6099 r_symndx = ELF64_R_SYM (r_info);
6100 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6101 return FALSE;
6102 }
6103
6104 if ((info->shared
6105 && (MUST_BE_DYN_RELOC (r_type)
6106 || (h != NULL
6107 && (!info->symbolic
6108 || h->root.type == bfd_link_hash_defweak
6109 || !h->def_regular))))
6110 || (ELIMINATE_COPY_RELOCS
6111 && !info->shared
6112 && h != NULL
6113 && (h->root.type == bfd_link_hash_defweak
6114 || !h->def_regular)))
6115 ;
6116 else
6117 return TRUE;
6118
6119 if (h != NULL)
6120 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6121 else if (sym_sec != NULL)
6122 pp = (struct ppc_dyn_relocs **) &elf_section_data (sym_sec)->local_dynrel;
6123 else
6124 pp = (struct ppc_dyn_relocs **) &elf_section_data (sec)->local_dynrel;
6125
6126 while ((p = *pp) != NULL)
6127 {
6128 if (p->sec == sec)
6129 {
6130 if (!MUST_BE_DYN_RELOC (r_type))
6131 p->pc_count -= 1;
6132 p->count -= 1;
6133 if (p->count == 0)
6134 *pp = p->next;
6135 return TRUE;
6136 }
6137 pp = &p->next;
6138 }
6139
6140 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6141 sec->owner, sec);
6142 bfd_set_error (bfd_error_bad_value);
6143 return FALSE;
6144 }
6145
6146 /* Remove unused Official Procedure Descriptor entries. Currently we
6147 only remove those associated with functions in discarded link-once
6148 sections, or weakly defined functions that have been overridden. It
6149 would be possible to remove many more entries for statically linked
6150 applications. */
6151
6152 bfd_boolean
6153 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6154 bfd_boolean no_opd_opt,
6155 bfd_boolean non_overlapping)
6156 {
6157 bfd *ibfd;
6158 bfd_boolean some_edited = FALSE;
6159 asection *need_pad = NULL;
6160
6161 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6162 {
6163 asection *sec;
6164 Elf_Internal_Rela *relstart, *rel, *relend;
6165 Elf_Internal_Shdr *symtab_hdr;
6166 Elf_Internal_Sym *local_syms;
6167 struct elf_link_hash_entry **sym_hashes;
6168 bfd_vma offset;
6169 bfd_size_type amt;
6170 long *opd_adjust;
6171 bfd_boolean need_edit, add_aux_fields;
6172 bfd_size_type cnt_16b = 0;
6173
6174 sec = bfd_get_section_by_name (ibfd, ".opd");
6175 if (sec == NULL || sec->size == 0)
6176 continue;
6177
6178 amt = sec->size * sizeof (long) / 8;
6179 opd_adjust = get_opd_info (sec);
6180 if (opd_adjust == NULL)
6181 {
6182 /* check_relocs hasn't been called. Must be a ld -r link
6183 or --just-symbols object. */
6184 opd_adjust = bfd_alloc (obfd, amt);
6185 if (opd_adjust == NULL)
6186 return FALSE;
6187 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6188 }
6189 memset (opd_adjust, 0, amt);
6190
6191 if (no_opd_opt)
6192 continue;
6193
6194 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6195 continue;
6196
6197 if (sec->output_section == bfd_abs_section_ptr)
6198 continue;
6199
6200 /* Look through the section relocs. */
6201 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6202 continue;
6203
6204 local_syms = NULL;
6205 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6206 sym_hashes = elf_sym_hashes (ibfd);
6207
6208 /* Read the relocations. */
6209 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6210 info->keep_memory);
6211 if (relstart == NULL)
6212 return FALSE;
6213
6214 /* First run through the relocs to check they are sane, and to
6215 determine whether we need to edit this opd section. */
6216 need_edit = FALSE;
6217 need_pad = sec;
6218 offset = 0;
6219 relend = relstart + sec->reloc_count;
6220 for (rel = relstart; rel < relend; )
6221 {
6222 enum elf_ppc64_reloc_type r_type;
6223 unsigned long r_symndx;
6224 asection *sym_sec;
6225 struct elf_link_hash_entry *h;
6226 Elf_Internal_Sym *sym;
6227
6228 /* .opd contains a regular array of 16 or 24 byte entries. We're
6229 only interested in the reloc pointing to a function entry
6230 point. */
6231 if (rel->r_offset != offset
6232 || rel + 1 >= relend
6233 || (rel + 1)->r_offset != offset + 8)
6234 {
6235 /* If someone messes with .opd alignment then after a
6236 "ld -r" we might have padding in the middle of .opd.
6237 Also, there's nothing to prevent someone putting
6238 something silly in .opd with the assembler. No .opd
6239 optimization for them! */
6240 broken_opd:
6241 (*_bfd_error_handler)
6242 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6243 need_edit = FALSE;
6244 break;
6245 }
6246
6247 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6248 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6249 {
6250 (*_bfd_error_handler)
6251 (_("%B: unexpected reloc type %u in .opd section"),
6252 ibfd, r_type);
6253 need_edit = FALSE;
6254 break;
6255 }
6256
6257 r_symndx = ELF64_R_SYM (rel->r_info);
6258 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6259 r_symndx, ibfd))
6260 goto error_ret;
6261
6262 if (sym_sec == NULL || sym_sec->owner == NULL)
6263 {
6264 const char *sym_name;
6265 if (h != NULL)
6266 sym_name = h->root.root.string;
6267 else
6268 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6269 sym_sec);
6270
6271 (*_bfd_error_handler)
6272 (_("%B: undefined sym `%s' in .opd section"),
6273 ibfd, sym_name);
6274 need_edit = FALSE;
6275 break;
6276 }
6277
6278 /* opd entries are always for functions defined in the
6279 current input bfd. If the symbol isn't defined in the
6280 input bfd, then we won't be using the function in this
6281 bfd; It must be defined in a linkonce section in another
6282 bfd, or is weak. It's also possible that we are
6283 discarding the function due to a linker script /DISCARD/,
6284 which we test for via the output_section. */
6285 if (sym_sec->owner != ibfd
6286 || sym_sec->output_section == bfd_abs_section_ptr)
6287 need_edit = TRUE;
6288
6289 rel += 2;
6290 if (rel == relend
6291 || (rel + 1 == relend && rel->r_offset == offset + 16))
6292 {
6293 if (sec->size == offset + 24)
6294 {
6295 need_pad = NULL;
6296 break;
6297 }
6298 if (rel == relend && sec->size == offset + 16)
6299 {
6300 cnt_16b++;
6301 break;
6302 }
6303 goto broken_opd;
6304 }
6305
6306 if (rel->r_offset == offset + 24)
6307 offset += 24;
6308 else if (rel->r_offset != offset + 16)
6309 goto broken_opd;
6310 else if (rel + 1 < relend
6311 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6312 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6313 {
6314 offset += 16;
6315 cnt_16b++;
6316 }
6317 else if (rel + 2 < relend
6318 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6319 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6320 {
6321 offset += 24;
6322 rel += 1;
6323 }
6324 else
6325 goto broken_opd;
6326 }
6327
6328 add_aux_fields = non_overlapping && cnt_16b > 0;
6329
6330 if (need_edit || add_aux_fields)
6331 {
6332 Elf_Internal_Rela *write_rel;
6333 bfd_byte *rptr, *wptr;
6334 bfd_byte *new_contents = NULL;
6335 bfd_boolean skip;
6336 long opd_ent_size;
6337
6338 /* This seems a waste of time as input .opd sections are all
6339 zeros as generated by gcc, but I suppose there's no reason
6340 this will always be so. We might start putting something in
6341 the third word of .opd entries. */
6342 if ((sec->flags & SEC_IN_MEMORY) == 0)
6343 {
6344 bfd_byte *loc;
6345 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6346 {
6347 if (loc != NULL)
6348 free (loc);
6349 error_ret:
6350 if (local_syms != NULL
6351 && symtab_hdr->contents != (unsigned char *) local_syms)
6352 free (local_syms);
6353 if (elf_section_data (sec)->relocs != relstart)
6354 free (relstart);
6355 return FALSE;
6356 }
6357 sec->contents = loc;
6358 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6359 }
6360
6361 elf_section_data (sec)->relocs = relstart;
6362
6363 new_contents = sec->contents;
6364 if (add_aux_fields)
6365 {
6366 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6367 if (new_contents == NULL)
6368 return FALSE;
6369 need_pad = FALSE;
6370 }
6371 wptr = new_contents;
6372 rptr = sec->contents;
6373
6374 write_rel = relstart;
6375 skip = FALSE;
6376 offset = 0;
6377 opd_ent_size = 0;
6378 for (rel = relstart; rel < relend; rel++)
6379 {
6380 unsigned long r_symndx;
6381 asection *sym_sec;
6382 struct elf_link_hash_entry *h;
6383 Elf_Internal_Sym *sym;
6384
6385 r_symndx = ELF64_R_SYM (rel->r_info);
6386 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6387 r_symndx, ibfd))
6388 goto error_ret;
6389
6390 if (rel->r_offset == offset)
6391 {
6392 struct ppc_link_hash_entry *fdh = NULL;
6393
6394 /* See if the .opd entry is full 24 byte or
6395 16 byte (with fd_aux entry overlapped with next
6396 fd_func). */
6397 opd_ent_size = 24;
6398 if ((rel + 2 == relend && sec->size == offset + 16)
6399 || (rel + 3 < relend
6400 && rel[2].r_offset == offset + 16
6401 && rel[3].r_offset == offset + 24
6402 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6403 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6404 opd_ent_size = 16;
6405
6406 if (h != NULL
6407 && h->root.root.string[0] == '.')
6408 {
6409 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6410 ppc_hash_table (info));
6411 if (fdh != NULL
6412 && fdh->elf.root.type != bfd_link_hash_defined
6413 && fdh->elf.root.type != bfd_link_hash_defweak)
6414 fdh = NULL;
6415 }
6416
6417 skip = (sym_sec->owner != ibfd
6418 || sym_sec->output_section == bfd_abs_section_ptr);
6419 if (skip)
6420 {
6421 if (fdh != NULL && sym_sec->owner == ibfd)
6422 {
6423 /* Arrange for the function descriptor sym
6424 to be dropped. */
6425 fdh->elf.root.u.def.value = 0;
6426 fdh->elf.root.u.def.section = sym_sec;
6427 }
6428 opd_adjust[rel->r_offset / 8] = -1;
6429 }
6430 else
6431 {
6432 /* We'll be keeping this opd entry. */
6433
6434 if (fdh != NULL)
6435 {
6436 /* Redefine the function descriptor symbol to
6437 this location in the opd section. It is
6438 necessary to update the value here rather
6439 than using an array of adjustments as we do
6440 for local symbols, because various places
6441 in the generic ELF code use the value
6442 stored in u.def.value. */
6443 fdh->elf.root.u.def.value = wptr - new_contents;
6444 fdh->adjust_done = 1;
6445 }
6446
6447 /* Local syms are a bit tricky. We could
6448 tweak them as they can be cached, but
6449 we'd need to look through the local syms
6450 for the function descriptor sym which we
6451 don't have at the moment. So keep an
6452 array of adjustments. */
6453 opd_adjust[rel->r_offset / 8]
6454 = (wptr - new_contents) - (rptr - sec->contents);
6455
6456 if (wptr != rptr)
6457 memcpy (wptr, rptr, opd_ent_size);
6458 wptr += opd_ent_size;
6459 if (add_aux_fields && opd_ent_size == 16)
6460 {
6461 memset (wptr, '\0', 8);
6462 wptr += 8;
6463 }
6464 }
6465 rptr += opd_ent_size;
6466 offset += opd_ent_size;
6467 }
6468
6469 if (skip)
6470 {
6471 if (!info->relocatable
6472 && !dec_dynrel_count (rel->r_info, sec, info,
6473 NULL, h, sym_sec))
6474 goto error_ret;
6475 }
6476 else
6477 {
6478 /* We need to adjust any reloc offsets to point to the
6479 new opd entries. While we're at it, we may as well
6480 remove redundant relocs. */
6481 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6482 if (write_rel != rel)
6483 memcpy (write_rel, rel, sizeof (*rel));
6484 ++write_rel;
6485 }
6486 }
6487
6488 sec->size = wptr - new_contents;
6489 sec->reloc_count = write_rel - relstart;
6490 if (add_aux_fields)
6491 {
6492 free (sec->contents);
6493 sec->contents = new_contents;
6494 }
6495
6496 /* Fudge the size too, as this is used later in
6497 elf_bfd_final_link if we are emitting relocs. */
6498 elf_section_data (sec)->rel_hdr.sh_size
6499 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6500 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6501 some_edited = TRUE;
6502 }
6503 else if (elf_section_data (sec)->relocs != relstart)
6504 free (relstart);
6505
6506 if (local_syms != NULL
6507 && symtab_hdr->contents != (unsigned char *) local_syms)
6508 {
6509 if (!info->keep_memory)
6510 free (local_syms);
6511 else
6512 symtab_hdr->contents = (unsigned char *) local_syms;
6513 }
6514 }
6515
6516 if (some_edited)
6517 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6518
6519 /* If we are doing a final link and the last .opd entry is just 16 byte
6520 long, add a 8 byte padding after it. */
6521 if (need_pad != NULL && !info->relocatable)
6522 {
6523 bfd_byte *p;
6524
6525 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6526 {
6527 BFD_ASSERT (need_pad->size > 0);
6528
6529 p = bfd_malloc (need_pad->size + 8);
6530 if (p == NULL)
6531 return FALSE;
6532
6533 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6534 p, 0, need_pad->size))
6535 return FALSE;
6536
6537 need_pad->contents = p;
6538 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6539 }
6540 else
6541 {
6542 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6543 if (p == NULL)
6544 return FALSE;
6545
6546 need_pad->contents = p;
6547 }
6548
6549 memset (need_pad->contents + need_pad->size, 0, 8);
6550 need_pad->size += 8;
6551 }
6552
6553 return TRUE;
6554 }
6555
6556 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6557
6558 asection *
6559 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6560 {
6561 struct ppc_link_hash_table *htab;
6562
6563 htab = ppc_hash_table (info);
6564 if (htab->tls_get_addr != NULL)
6565 {
6566 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6567
6568 while (h->elf.root.type == bfd_link_hash_indirect
6569 || h->elf.root.type == bfd_link_hash_warning)
6570 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6571
6572 htab->tls_get_addr = h;
6573
6574 if (htab->tls_get_addr_fd == NULL
6575 && h->oh != NULL
6576 && h->oh->is_func_descriptor
6577 && (h->oh->elf.root.type == bfd_link_hash_defined
6578 || h->oh->elf.root.type == bfd_link_hash_defweak))
6579 htab->tls_get_addr_fd = h->oh;
6580 }
6581
6582 if (htab->tls_get_addr_fd != NULL)
6583 {
6584 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6585
6586 while (h->elf.root.type == bfd_link_hash_indirect
6587 || h->elf.root.type == bfd_link_hash_warning)
6588 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6589
6590 htab->tls_get_addr_fd = h;
6591 }
6592
6593 return _bfd_elf_tls_setup (obfd, info);
6594 }
6595
6596 /* Run through all the TLS relocs looking for optimization
6597 opportunities. The linker has been hacked (see ppc64elf.em) to do
6598 a preliminary section layout so that we know the TLS segment
6599 offsets. We can't optimize earlier because some optimizations need
6600 to know the tp offset, and we need to optimize before allocating
6601 dynamic relocations. */
6602
6603 bfd_boolean
6604 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6605 {
6606 bfd *ibfd;
6607 asection *sec;
6608 struct ppc_link_hash_table *htab;
6609
6610 if (info->relocatable || info->shared)
6611 return TRUE;
6612
6613 htab = ppc_hash_table (info);
6614 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6615 {
6616 Elf_Internal_Sym *locsyms = NULL;
6617
6618 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6619 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6620 {
6621 Elf_Internal_Rela *relstart, *rel, *relend;
6622 int expecting_tls_get_addr;
6623
6624 /* Read the relocations. */
6625 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6626 info->keep_memory);
6627 if (relstart == NULL)
6628 return FALSE;
6629
6630 expecting_tls_get_addr = 0;
6631 relend = relstart + sec->reloc_count;
6632 for (rel = relstart; rel < relend; rel++)
6633 {
6634 enum elf_ppc64_reloc_type r_type;
6635 unsigned long r_symndx;
6636 struct elf_link_hash_entry *h;
6637 Elf_Internal_Sym *sym;
6638 asection *sym_sec;
6639 char *tls_mask;
6640 char tls_set, tls_clear, tls_type = 0;
6641 bfd_vma value;
6642 bfd_boolean ok_tprel, is_local;
6643
6644 r_symndx = ELF64_R_SYM (rel->r_info);
6645 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6646 r_symndx, ibfd))
6647 {
6648 err_free_rel:
6649 if (elf_section_data (sec)->relocs != relstart)
6650 free (relstart);
6651 if (locsyms != NULL
6652 && (elf_tdata (ibfd)->symtab_hdr.contents
6653 != (unsigned char *) locsyms))
6654 free (locsyms);
6655 return FALSE;
6656 }
6657
6658 if (h != NULL)
6659 {
6660 if (h->root.type != bfd_link_hash_defined
6661 && h->root.type != bfd_link_hash_defweak)
6662 continue;
6663 value = h->root.u.def.value;
6664 }
6665 else
6666 /* Symbols referenced by TLS relocs must be of type
6667 STT_TLS. So no need for .opd local sym adjust. */
6668 value = sym->st_value;
6669
6670 ok_tprel = FALSE;
6671 is_local = FALSE;
6672 if (h == NULL
6673 || !h->def_dynamic)
6674 {
6675 is_local = TRUE;
6676 value += sym_sec->output_offset;
6677 value += sym_sec->output_section->vma;
6678 value -= htab->elf.tls_sec->vma;
6679 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6680 < (bfd_vma) 1 << 32);
6681 }
6682
6683 r_type = ELF64_R_TYPE (rel->r_info);
6684 switch (r_type)
6685 {
6686 case R_PPC64_GOT_TLSLD16:
6687 case R_PPC64_GOT_TLSLD16_LO:
6688 case R_PPC64_GOT_TLSLD16_HI:
6689 case R_PPC64_GOT_TLSLD16_HA:
6690 /* These relocs should never be against a symbol
6691 defined in a shared lib. Leave them alone if
6692 that turns out to be the case. */
6693 ppc64_tlsld_got (ibfd)->refcount -= 1;
6694 if (!is_local)
6695 continue;
6696
6697 /* LD -> LE */
6698 tls_set = 0;
6699 tls_clear = TLS_LD;
6700 tls_type = TLS_TLS | TLS_LD;
6701 expecting_tls_get_addr = 1;
6702 break;
6703
6704 case R_PPC64_GOT_TLSGD16:
6705 case R_PPC64_GOT_TLSGD16_LO:
6706 case R_PPC64_GOT_TLSGD16_HI:
6707 case R_PPC64_GOT_TLSGD16_HA:
6708 if (ok_tprel)
6709 /* GD -> LE */
6710 tls_set = 0;
6711 else
6712 /* GD -> IE */
6713 tls_set = TLS_TLS | TLS_TPRELGD;
6714 tls_clear = TLS_GD;
6715 tls_type = TLS_TLS | TLS_GD;
6716 expecting_tls_get_addr = 1;
6717 break;
6718
6719 case R_PPC64_GOT_TPREL16_DS:
6720 case R_PPC64_GOT_TPREL16_LO_DS:
6721 case R_PPC64_GOT_TPREL16_HI:
6722 case R_PPC64_GOT_TPREL16_HA:
6723 expecting_tls_get_addr = 0;
6724 if (ok_tprel)
6725 {
6726 /* IE -> LE */
6727 tls_set = 0;
6728 tls_clear = TLS_TPREL;
6729 tls_type = TLS_TLS | TLS_TPREL;
6730 break;
6731 }
6732 else
6733 continue;
6734
6735 case R_PPC64_REL14:
6736 case R_PPC64_REL14_BRTAKEN:
6737 case R_PPC64_REL14_BRNTAKEN:
6738 case R_PPC64_REL24:
6739 if (h != NULL
6740 && (h == &htab->tls_get_addr->elf
6741 || h == &htab->tls_get_addr_fd->elf))
6742 {
6743 if (!expecting_tls_get_addr
6744 && rel != relstart
6745 && ((ELF64_R_TYPE (rel[-1].r_info)
6746 == R_PPC64_TOC16)
6747 || (ELF64_R_TYPE (rel[-1].r_info)
6748 == R_PPC64_TOC16_LO)))
6749 {
6750 /* Check for toc tls entries. */
6751 char *toc_tls;
6752 int retval;
6753
6754 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6755 rel - 1, ibfd);
6756 if (retval == 0)
6757 goto err_free_rel;
6758 if (toc_tls != NULL)
6759 expecting_tls_get_addr = retval > 1;
6760 }
6761
6762 if (expecting_tls_get_addr)
6763 {
6764 struct plt_entry *ent;
6765 for (ent = h->plt.plist; ent; ent = ent->next)
6766 if (ent->addend == 0)
6767 {
6768 if (ent->plt.refcount > 0)
6769 ent->plt.refcount -= 1;
6770 break;
6771 }
6772 }
6773 }
6774 expecting_tls_get_addr = 0;
6775 continue;
6776
6777 case R_PPC64_TPREL64:
6778 expecting_tls_get_addr = 0;
6779 if (ok_tprel)
6780 {
6781 /* IE -> LE */
6782 tls_set = TLS_EXPLICIT;
6783 tls_clear = TLS_TPREL;
6784 break;
6785 }
6786 else
6787 continue;
6788
6789 case R_PPC64_DTPMOD64:
6790 expecting_tls_get_addr = 0;
6791 if (rel + 1 < relend
6792 && (rel[1].r_info
6793 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6794 && rel[1].r_offset == rel->r_offset + 8)
6795 {
6796 if (ok_tprel)
6797 /* GD -> LE */
6798 tls_set = TLS_EXPLICIT | TLS_GD;
6799 else
6800 /* GD -> IE */
6801 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6802 tls_clear = TLS_GD;
6803 }
6804 else
6805 {
6806 if (!is_local)
6807 continue;
6808
6809 /* LD -> LE */
6810 tls_set = TLS_EXPLICIT;
6811 tls_clear = TLS_LD;
6812 }
6813 break;
6814
6815 default:
6816 expecting_tls_get_addr = 0;
6817 continue;
6818 }
6819
6820 if ((tls_set & TLS_EXPLICIT) == 0)
6821 {
6822 struct got_entry *ent;
6823
6824 /* Adjust got entry for this reloc. */
6825 if (h != NULL)
6826 ent = h->got.glist;
6827 else
6828 ent = elf_local_got_ents (ibfd)[r_symndx];
6829
6830 for (; ent != NULL; ent = ent->next)
6831 if (ent->addend == rel->r_addend
6832 && ent->owner == ibfd
6833 && ent->tls_type == tls_type)
6834 break;
6835 if (ent == NULL)
6836 abort ();
6837
6838 if (tls_set == 0)
6839 {
6840 /* We managed to get rid of a got entry. */
6841 if (ent->got.refcount > 0)
6842 ent->got.refcount -= 1;
6843 }
6844 }
6845 else
6846 {
6847 /* If we got rid of a DTPMOD/DTPREL reloc pair then
6848 we'll lose one or two dyn relocs. */
6849 if (!dec_dynrel_count (rel->r_info, sec, info,
6850 NULL, h, sym_sec))
6851 return FALSE;
6852
6853 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6854 {
6855 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
6856 NULL, h, sym_sec))
6857 return FALSE;
6858 }
6859 }
6860
6861 *tls_mask |= tls_set;
6862 *tls_mask &= ~tls_clear;
6863 }
6864
6865 if (elf_section_data (sec)->relocs != relstart)
6866 free (relstart);
6867 }
6868
6869 if (locsyms != NULL
6870 && (elf_tdata (ibfd)->symtab_hdr.contents
6871 != (unsigned char *) locsyms))
6872 {
6873 if (!info->keep_memory)
6874 free (locsyms);
6875 else
6876 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6877 }
6878 }
6879 return TRUE;
6880 }
6881
6882 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6883 the values of any global symbols in a toc section that has been
6884 edited. Globals in toc sections should be a rarity, so this function
6885 sets a flag if any are found in toc sections other than the one just
6886 edited, so that futher hash table traversals can be avoided. */
6887
6888 struct adjust_toc_info
6889 {
6890 asection *toc;
6891 unsigned long *skip;
6892 bfd_boolean global_toc_syms;
6893 };
6894
6895 static bfd_boolean
6896 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6897 {
6898 struct ppc_link_hash_entry *eh;
6899 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6900
6901 if (h->root.type == bfd_link_hash_indirect)
6902 return TRUE;
6903
6904 if (h->root.type == bfd_link_hash_warning)
6905 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6906
6907 if (h->root.type != bfd_link_hash_defined
6908 && h->root.type != bfd_link_hash_defweak)
6909 return TRUE;
6910
6911 eh = (struct ppc_link_hash_entry *) h;
6912 if (eh->adjust_done)
6913 return TRUE;
6914
6915 if (eh->elf.root.u.def.section == toc_inf->toc)
6916 {
6917 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6918 if (skip != (unsigned long) -1)
6919 eh->elf.root.u.def.value -= skip;
6920 else
6921 {
6922 (*_bfd_error_handler)
6923 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6924 eh->elf.root.u.def.section = &bfd_abs_section;
6925 eh->elf.root.u.def.value = 0;
6926 }
6927 eh->adjust_done = 1;
6928 }
6929 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6930 toc_inf->global_toc_syms = TRUE;
6931
6932 return TRUE;
6933 }
6934
6935 /* Examine all relocs referencing .toc sections in order to remove
6936 unused .toc entries. */
6937
6938 bfd_boolean
6939 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6940 {
6941 bfd *ibfd;
6942 struct adjust_toc_info toc_inf;
6943
6944 toc_inf.global_toc_syms = TRUE;
6945 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6946 {
6947 asection *toc, *sec;
6948 Elf_Internal_Shdr *symtab_hdr;
6949 Elf_Internal_Sym *local_syms;
6950 struct elf_link_hash_entry **sym_hashes;
6951 Elf_Internal_Rela *relstart, *rel;
6952 unsigned long *skip, *drop;
6953 unsigned char *used;
6954 unsigned char *keep, last, some_unused;
6955
6956 toc = bfd_get_section_by_name (ibfd, ".toc");
6957 if (toc == NULL
6958 || toc->size == 0
6959 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6960 || elf_discarded_section (toc))
6961 continue;
6962
6963 local_syms = NULL;
6964 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6965 sym_hashes = elf_sym_hashes (ibfd);
6966
6967 /* Look at sections dropped from the final link. */
6968 skip = NULL;
6969 relstart = NULL;
6970 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6971 {
6972 if (sec->reloc_count == 0
6973 || !elf_discarded_section (sec)
6974 || get_opd_info (sec)
6975 || (sec->flags & SEC_ALLOC) == 0
6976 || (sec->flags & SEC_DEBUGGING) != 0)
6977 continue;
6978
6979 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6980 if (relstart == NULL)
6981 goto error_ret;
6982
6983 /* Run through the relocs to see which toc entries might be
6984 unused. */
6985 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6986 {
6987 enum elf_ppc64_reloc_type r_type;
6988 unsigned long r_symndx;
6989 asection *sym_sec;
6990 struct elf_link_hash_entry *h;
6991 Elf_Internal_Sym *sym;
6992 bfd_vma val;
6993
6994 r_type = ELF64_R_TYPE (rel->r_info);
6995 switch (r_type)
6996 {
6997 default:
6998 continue;
6999
7000 case R_PPC64_TOC16:
7001 case R_PPC64_TOC16_LO:
7002 case R_PPC64_TOC16_HI:
7003 case R_PPC64_TOC16_HA:
7004 case R_PPC64_TOC16_DS:
7005 case R_PPC64_TOC16_LO_DS:
7006 break;
7007 }
7008
7009 r_symndx = ELF64_R_SYM (rel->r_info);
7010 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7011 r_symndx, ibfd))
7012 goto error_ret;
7013
7014 if (sym_sec != toc)
7015 continue;
7016
7017 if (h != NULL)
7018 val = h->root.u.def.value;
7019 else
7020 val = sym->st_value;
7021 val += rel->r_addend;
7022
7023 if (val >= toc->size)
7024 continue;
7025
7026 /* Anything in the toc ought to be aligned to 8 bytes.
7027 If not, don't mark as unused. */
7028 if (val & 7)
7029 continue;
7030
7031 if (skip == NULL)
7032 {
7033 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7034 if (skip == NULL)
7035 goto error_ret;
7036 }
7037
7038 skip[val >> 3] = 1;
7039 }
7040
7041 if (elf_section_data (sec)->relocs != relstart)
7042 free (relstart);
7043 }
7044
7045 if (skip == NULL)
7046 continue;
7047
7048 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7049 if (used == NULL)
7050 {
7051 error_ret:
7052 if (local_syms != NULL
7053 && symtab_hdr->contents != (unsigned char *) local_syms)
7054 free (local_syms);
7055 if (sec != NULL
7056 && relstart != NULL
7057 && elf_section_data (sec)->relocs != relstart)
7058 free (relstart);
7059 if (skip != NULL)
7060 free (skip);
7061 return FALSE;
7062 }
7063
7064 /* Now check all kept sections that might reference the toc. */
7065 for (sec = ibfd->sections;
7066 sec != NULL;
7067 /* Check the toc itself last. */
7068 sec = (sec == toc ? NULL
7069 : sec->next == toc && sec->next->next ? sec->next->next
7070 : sec->next == NULL ? toc
7071 : sec->next))
7072 {
7073 int repeat;
7074
7075 if (sec->reloc_count == 0
7076 || elf_discarded_section (sec)
7077 || get_opd_info (sec)
7078 || (sec->flags & SEC_ALLOC) == 0
7079 || (sec->flags & SEC_DEBUGGING) != 0)
7080 continue;
7081
7082 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7083 if (relstart == NULL)
7084 goto error_ret;
7085
7086 /* Mark toc entries referenced as used. */
7087 repeat = 0;
7088 do
7089 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7090 {
7091 enum elf_ppc64_reloc_type r_type;
7092 unsigned long r_symndx;
7093 asection *sym_sec;
7094 struct elf_link_hash_entry *h;
7095 Elf_Internal_Sym *sym;
7096 bfd_vma val;
7097
7098 r_type = ELF64_R_TYPE (rel->r_info);
7099 switch (r_type)
7100 {
7101 case R_PPC64_TOC16:
7102 case R_PPC64_TOC16_LO:
7103 case R_PPC64_TOC16_HI:
7104 case R_PPC64_TOC16_HA:
7105 case R_PPC64_TOC16_DS:
7106 case R_PPC64_TOC16_LO_DS:
7107 /* In case we're taking addresses of toc entries. */
7108 case R_PPC64_ADDR64:
7109 break;
7110
7111 default:
7112 continue;
7113 }
7114
7115 r_symndx = ELF64_R_SYM (rel->r_info);
7116 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7117 r_symndx, ibfd))
7118 {
7119 free (used);
7120 goto error_ret;
7121 }
7122
7123 if (sym_sec != toc)
7124 continue;
7125
7126 if (h != NULL)
7127 val = h->root.u.def.value;
7128 else
7129 val = sym->st_value;
7130 val += rel->r_addend;
7131
7132 if (val >= toc->size)
7133 continue;
7134
7135 /* For the toc section, we only mark as used if
7136 this entry itself isn't unused. */
7137 if (sec == toc
7138 && !used[val >> 3]
7139 && (used[rel->r_offset >> 3]
7140 || !skip[rel->r_offset >> 3]))
7141 /* Do all the relocs again, to catch reference
7142 chains. */
7143 repeat = 1;
7144
7145 used[val >> 3] = 1;
7146 }
7147 while (repeat);
7148 }
7149
7150 /* Merge the used and skip arrays. Assume that TOC
7151 doublewords not appearing as either used or unused belong
7152 to to an entry more than one doubleword in size. */
7153 for (drop = skip, keep = used, last = 0, some_unused = 0;
7154 drop < skip + (toc->size + 7) / 8;
7155 ++drop, ++keep)
7156 {
7157 if (*keep)
7158 {
7159 *drop = 0;
7160 last = 0;
7161 }
7162 else if (*drop)
7163 {
7164 some_unused = 1;
7165 last = 1;
7166 }
7167 else
7168 *drop = last;
7169 }
7170
7171 free (used);
7172
7173 if (some_unused)
7174 {
7175 bfd_byte *contents, *src;
7176 unsigned long off;
7177
7178 /* Shuffle the toc contents, and at the same time convert the
7179 skip array from booleans into offsets. */
7180 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7181 goto error_ret;
7182
7183 elf_section_data (toc)->this_hdr.contents = contents;
7184
7185 for (src = contents, off = 0, drop = skip;
7186 src < contents + toc->size;
7187 src += 8, ++drop)
7188 {
7189 if (*drop)
7190 {
7191 *drop = (unsigned long) -1;
7192 off += 8;
7193 }
7194 else if (off != 0)
7195 {
7196 *drop = off;
7197 memcpy (src - off, src, 8);
7198 }
7199 }
7200 toc->rawsize = toc->size;
7201 toc->size = src - contents - off;
7202
7203 if (toc->reloc_count != 0)
7204 {
7205 Elf_Internal_Rela *wrel;
7206 bfd_size_type sz;
7207
7208 /* Read toc relocs. */
7209 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7210 TRUE);
7211 if (relstart == NULL)
7212 goto error_ret;
7213
7214 /* Remove unused toc relocs, and adjust those we keep. */
7215 wrel = relstart;
7216 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7217 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7218 {
7219 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7220 wrel->r_info = rel->r_info;
7221 wrel->r_addend = rel->r_addend;
7222 ++wrel;
7223 }
7224 else if (!dec_dynrel_count (rel->r_info, toc, info,
7225 &local_syms, NULL, NULL))
7226 goto error_ret;
7227
7228 toc->reloc_count = wrel - relstart;
7229 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7230 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7231 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7232 }
7233
7234 /* Adjust addends for relocs against the toc section sym. */
7235 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7236 {
7237 if (sec->reloc_count == 0
7238 || elf_discarded_section (sec))
7239 continue;
7240
7241 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7242 TRUE);
7243 if (relstart == NULL)
7244 goto error_ret;
7245
7246 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7247 {
7248 enum elf_ppc64_reloc_type r_type;
7249 unsigned long r_symndx;
7250 asection *sym_sec;
7251 struct elf_link_hash_entry *h;
7252 Elf_Internal_Sym *sym;
7253
7254 r_type = ELF64_R_TYPE (rel->r_info);
7255 switch (r_type)
7256 {
7257 default:
7258 continue;
7259
7260 case R_PPC64_TOC16:
7261 case R_PPC64_TOC16_LO:
7262 case R_PPC64_TOC16_HI:
7263 case R_PPC64_TOC16_HA:
7264 case R_PPC64_TOC16_DS:
7265 case R_PPC64_TOC16_LO_DS:
7266 case R_PPC64_ADDR64:
7267 break;
7268 }
7269
7270 r_symndx = ELF64_R_SYM (rel->r_info);
7271 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7272 r_symndx, ibfd))
7273 goto error_ret;
7274
7275 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7276 continue;
7277
7278 rel->r_addend -= skip[rel->r_addend >> 3];
7279 }
7280 }
7281
7282 /* We shouldn't have local or global symbols defined in the TOC,
7283 but handle them anyway. */
7284 if (local_syms != NULL)
7285 {
7286 Elf_Internal_Sym *sym;
7287
7288 for (sym = local_syms;
7289 sym < local_syms + symtab_hdr->sh_info;
7290 ++sym)
7291 if (sym->st_shndx != SHN_UNDEF
7292 && (sym->st_shndx < SHN_LORESERVE
7293 || sym->st_shndx > SHN_HIRESERVE)
7294 && sym->st_value != 0
7295 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7296 {
7297 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7298 sym->st_value -= skip[sym->st_value >> 3];
7299 else
7300 {
7301 (*_bfd_error_handler)
7302 (_("%s defined in removed toc entry"),
7303 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7304 NULL));
7305 sym->st_value = 0;
7306 sym->st_shndx = SHN_ABS;
7307 }
7308 symtab_hdr->contents = (unsigned char *) local_syms;
7309 }
7310 }
7311
7312 /* Finally, adjust any global syms defined in the toc. */
7313 if (toc_inf.global_toc_syms)
7314 {
7315 toc_inf.toc = toc;
7316 toc_inf.skip = skip;
7317 toc_inf.global_toc_syms = FALSE;
7318 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7319 &toc_inf);
7320 }
7321 }
7322
7323 if (local_syms != NULL
7324 && symtab_hdr->contents != (unsigned char *) local_syms)
7325 {
7326 if (!info->keep_memory)
7327 free (local_syms);
7328 else
7329 symtab_hdr->contents = (unsigned char *) local_syms;
7330 }
7331 free (skip);
7332 }
7333
7334 return TRUE;
7335 }
7336
7337 /* Allocate space in .plt, .got and associated reloc sections for
7338 dynamic relocs. */
7339
7340 static bfd_boolean
7341 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7342 {
7343 struct bfd_link_info *info;
7344 struct ppc_link_hash_table *htab;
7345 asection *s;
7346 struct ppc_link_hash_entry *eh;
7347 struct ppc_dyn_relocs *p;
7348 struct got_entry *gent;
7349
7350 if (h->root.type == bfd_link_hash_indirect)
7351 return TRUE;
7352
7353 if (h->root.type == bfd_link_hash_warning)
7354 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7355
7356 info = (struct bfd_link_info *) inf;
7357 htab = ppc_hash_table (info);
7358
7359 if (htab->elf.dynamic_sections_created
7360 && h->dynindx != -1
7361 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7362 {
7363 struct plt_entry *pent;
7364 bfd_boolean doneone = FALSE;
7365 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7366 if (pent->plt.refcount > 0)
7367 {
7368 /* If this is the first .plt entry, make room for the special
7369 first entry. */
7370 s = htab->plt;
7371 if (s->size == 0)
7372 s->size += PLT_INITIAL_ENTRY_SIZE;
7373
7374 pent->plt.offset = s->size;
7375
7376 /* Make room for this entry. */
7377 s->size += PLT_ENTRY_SIZE;
7378
7379 /* Make room for the .glink code. */
7380 s = htab->glink;
7381 if (s->size == 0)
7382 s->size += GLINK_CALL_STUB_SIZE;
7383 /* We need bigger stubs past index 32767. */
7384 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7385 s->size += 4;
7386 s->size += 2*4;
7387
7388 /* We also need to make an entry in the .rela.plt section. */
7389 s = htab->relplt;
7390 s->size += sizeof (Elf64_External_Rela);
7391 doneone = TRUE;
7392 }
7393 else
7394 pent->plt.offset = (bfd_vma) -1;
7395 if (!doneone)
7396 {
7397 h->plt.plist = NULL;
7398 h->needs_plt = 0;
7399 }
7400 }
7401 else
7402 {
7403 h->plt.plist = NULL;
7404 h->needs_plt = 0;
7405 }
7406
7407 eh = (struct ppc_link_hash_entry *) h;
7408 /* Run through the TLS GD got entries first if we're changing them
7409 to TPREL. */
7410 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7411 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7412 if (gent->got.refcount > 0
7413 && (gent->tls_type & TLS_GD) != 0)
7414 {
7415 /* This was a GD entry that has been converted to TPREL. If
7416 there happens to be a TPREL entry we can use that one. */
7417 struct got_entry *ent;
7418 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7419 if (ent->got.refcount > 0
7420 && (ent->tls_type & TLS_TPREL) != 0
7421 && ent->addend == gent->addend
7422 && ent->owner == gent->owner)
7423 {
7424 gent->got.refcount = 0;
7425 break;
7426 }
7427
7428 /* If not, then we'll be using our own TPREL entry. */
7429 if (gent->got.refcount != 0)
7430 gent->tls_type = TLS_TLS | TLS_TPREL;
7431 }
7432
7433 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7434 if (gent->got.refcount > 0)
7435 {
7436 bfd_boolean dyn;
7437
7438 /* Make sure this symbol is output as a dynamic symbol.
7439 Undefined weak syms won't yet be marked as dynamic,
7440 nor will all TLS symbols. */
7441 if (h->dynindx == -1
7442 && !h->forced_local)
7443 {
7444 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7445 return FALSE;
7446 }
7447
7448 if ((gent->tls_type & TLS_LD) != 0
7449 && !h->def_dynamic)
7450 {
7451 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7452 continue;
7453 }
7454
7455 s = ppc64_elf_tdata (gent->owner)->got;
7456 gent->got.offset = s->size;
7457 s->size
7458 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7459 dyn = htab->elf.dynamic_sections_created;
7460 if ((info->shared
7461 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7462 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7463 || h->root.type != bfd_link_hash_undefweak))
7464 ppc64_elf_tdata (gent->owner)->relgot->size
7465 += (gent->tls_type & eh->tls_mask & TLS_GD
7466 ? 2 * sizeof (Elf64_External_Rela)
7467 : sizeof (Elf64_External_Rela));
7468 }
7469 else
7470 gent->got.offset = (bfd_vma) -1;
7471
7472 if (eh->dyn_relocs == NULL)
7473 return TRUE;
7474
7475 /* In the shared -Bsymbolic case, discard space allocated for
7476 dynamic pc-relative relocs against symbols which turn out to be
7477 defined in regular objects. For the normal shared case, discard
7478 space for relocs that have become local due to symbol visibility
7479 changes. */
7480
7481 if (info->shared)
7482 {
7483 /* Relocs that use pc_count are those that appear on a call insn,
7484 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7485 generated via assembly. We want calls to protected symbols to
7486 resolve directly to the function rather than going via the plt.
7487 If people want function pointer comparisons to work as expected
7488 then they should avoid writing weird assembly. */
7489 if (SYMBOL_CALLS_LOCAL (info, h))
7490 {
7491 struct ppc_dyn_relocs **pp;
7492
7493 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7494 {
7495 p->count -= p->pc_count;
7496 p->pc_count = 0;
7497 if (p->count == 0)
7498 *pp = p->next;
7499 else
7500 pp = &p->next;
7501 }
7502 }
7503
7504 /* Also discard relocs on undefined weak syms with non-default
7505 visibility. */
7506 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7507 && h->root.type == bfd_link_hash_undefweak)
7508 eh->dyn_relocs = NULL;
7509 }
7510 else if (ELIMINATE_COPY_RELOCS)
7511 {
7512 /* For the non-shared case, discard space for relocs against
7513 symbols which turn out to need copy relocs or are not
7514 dynamic. */
7515
7516 if (!h->non_got_ref
7517 && h->def_dynamic
7518 && !h->def_regular)
7519 {
7520 /* Make sure this symbol is output as a dynamic symbol.
7521 Undefined weak syms won't yet be marked as dynamic. */
7522 if (h->dynindx == -1
7523 && !h->forced_local)
7524 {
7525 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7526 return FALSE;
7527 }
7528
7529 /* If that succeeded, we know we'll be keeping all the
7530 relocs. */
7531 if (h->dynindx != -1)
7532 goto keep;
7533 }
7534
7535 eh->dyn_relocs = NULL;
7536
7537 keep: ;
7538 }
7539
7540 /* Finally, allocate space. */
7541 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7542 {
7543 asection *sreloc = elf_section_data (p->sec)->sreloc;
7544 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7545 }
7546
7547 return TRUE;
7548 }
7549
7550 /* Find any dynamic relocs that apply to read-only sections. */
7551
7552 static bfd_boolean
7553 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7554 {
7555 struct ppc_link_hash_entry *eh;
7556 struct ppc_dyn_relocs *p;
7557
7558 if (h->root.type == bfd_link_hash_warning)
7559 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7560
7561 eh = (struct ppc_link_hash_entry *) h;
7562 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7563 {
7564 asection *s = p->sec->output_section;
7565
7566 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7567 {
7568 struct bfd_link_info *info = inf;
7569
7570 info->flags |= DF_TEXTREL;
7571
7572 /* Not an error, just cut short the traversal. */
7573 return FALSE;
7574 }
7575 }
7576 return TRUE;
7577 }
7578
7579 /* Set the sizes of the dynamic sections. */
7580
7581 static bfd_boolean
7582 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7583 struct bfd_link_info *info)
7584 {
7585 struct ppc_link_hash_table *htab;
7586 bfd *dynobj;
7587 asection *s;
7588 bfd_boolean relocs;
7589 bfd *ibfd;
7590
7591 htab = ppc_hash_table (info);
7592 dynobj = htab->elf.dynobj;
7593 if (dynobj == NULL)
7594 abort ();
7595
7596 if (htab->elf.dynamic_sections_created)
7597 {
7598 /* Set the contents of the .interp section to the interpreter. */
7599 if (info->executable)
7600 {
7601 s = bfd_get_section_by_name (dynobj, ".interp");
7602 if (s == NULL)
7603 abort ();
7604 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7605 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7606 }
7607 }
7608
7609 /* Set up .got offsets for local syms, and space for local dynamic
7610 relocs. */
7611 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7612 {
7613 struct got_entry **lgot_ents;
7614 struct got_entry **end_lgot_ents;
7615 char *lgot_masks;
7616 bfd_size_type locsymcount;
7617 Elf_Internal_Shdr *symtab_hdr;
7618 asection *srel;
7619
7620 if (!is_ppc64_elf_target (ibfd->xvec))
7621 continue;
7622
7623 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7624 {
7625 s = ppc64_elf_tdata (ibfd)->got;
7626 ppc64_tlsld_got (ibfd)->offset = s->size;
7627 s->size += 16;
7628 if (info->shared)
7629 {
7630 srel = ppc64_elf_tdata (ibfd)->relgot;
7631 srel->size += sizeof (Elf64_External_Rela);
7632 }
7633 }
7634 else
7635 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7636
7637 for (s = ibfd->sections; s != NULL; s = s->next)
7638 {
7639 struct ppc_dyn_relocs *p;
7640
7641 for (p = *((struct ppc_dyn_relocs **)
7642 &elf_section_data (s)->local_dynrel);
7643 p != NULL;
7644 p = p->next)
7645 {
7646 if (!bfd_is_abs_section (p->sec)
7647 && bfd_is_abs_section (p->sec->output_section))
7648 {
7649 /* Input section has been discarded, either because
7650 it is a copy of a linkonce section or due to
7651 linker script /DISCARD/, so we'll be discarding
7652 the relocs too. */
7653 }
7654 else if (p->count != 0)
7655 {
7656 srel = elf_section_data (p->sec)->sreloc;
7657 srel->size += p->count * sizeof (Elf64_External_Rela);
7658 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7659 info->flags |= DF_TEXTREL;
7660 }
7661 }
7662 }
7663
7664 lgot_ents = elf_local_got_ents (ibfd);
7665 if (!lgot_ents)
7666 continue;
7667
7668 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7669 locsymcount = symtab_hdr->sh_info;
7670 end_lgot_ents = lgot_ents + locsymcount;
7671 lgot_masks = (char *) end_lgot_ents;
7672 s = ppc64_elf_tdata (ibfd)->got;
7673 srel = ppc64_elf_tdata (ibfd)->relgot;
7674 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7675 {
7676 struct got_entry *ent;
7677
7678 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7679 if (ent->got.refcount > 0)
7680 {
7681 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7682 {
7683 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7684 {
7685 ppc64_tlsld_got (ibfd)->offset = s->size;
7686 s->size += 16;
7687 if (info->shared)
7688 srel->size += sizeof (Elf64_External_Rela);
7689 }
7690 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7691 }
7692 else
7693 {
7694 ent->got.offset = s->size;
7695 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7696 {
7697 s->size += 16;
7698 if (info->shared)
7699 srel->size += 2 * sizeof (Elf64_External_Rela);
7700 }
7701 else
7702 {
7703 s->size += 8;
7704 if (info->shared)
7705 srel->size += sizeof (Elf64_External_Rela);
7706 }
7707 }
7708 }
7709 else
7710 ent->got.offset = (bfd_vma) -1;
7711 }
7712 }
7713
7714 /* Allocate global sym .plt and .got entries, and space for global
7715 sym dynamic relocs. */
7716 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7717
7718 /* We now have determined the sizes of the various dynamic sections.
7719 Allocate memory for them. */
7720 relocs = FALSE;
7721 for (s = dynobj->sections; s != NULL; s = s->next)
7722 {
7723 if ((s->flags & SEC_LINKER_CREATED) == 0)
7724 continue;
7725
7726 if (s == htab->brlt || s == htab->relbrlt)
7727 /* These haven't been allocated yet; don't strip. */
7728 continue;
7729 else if (s == htab->got
7730 || s == htab->plt
7731 || s == htab->glink
7732 || s == htab->dynbss)
7733 {
7734 /* Strip this section if we don't need it; see the
7735 comment below. */
7736 }
7737 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7738 {
7739 if (s->size != 0)
7740 {
7741 if (s != htab->relplt)
7742 relocs = TRUE;
7743
7744 /* We use the reloc_count field as a counter if we need
7745 to copy relocs into the output file. */
7746 s->reloc_count = 0;
7747 }
7748 }
7749 else
7750 {
7751 /* It's not one of our sections, so don't allocate space. */
7752 continue;
7753 }
7754
7755 if (s->size == 0)
7756 {
7757 /* If we don't need this section, strip it from the
7758 output file. This is mostly to handle .rela.bss and
7759 .rela.plt. We must create both sections in
7760 create_dynamic_sections, because they must be created
7761 before the linker maps input sections to output
7762 sections. The linker does that before
7763 adjust_dynamic_symbol is called, and it is that
7764 function which decides whether anything needs to go
7765 into these sections. */
7766 s->flags |= SEC_EXCLUDE;
7767 continue;
7768 }
7769
7770 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7771 continue;
7772
7773 /* Allocate memory for the section contents. We use bfd_zalloc
7774 here in case unused entries are not reclaimed before the
7775 section's contents are written out. This should not happen,
7776 but this way if it does we get a R_PPC64_NONE reloc in .rela
7777 sections instead of garbage.
7778 We also rely on the section contents being zero when writing
7779 the GOT. */
7780 s->contents = bfd_zalloc (dynobj, s->size);
7781 if (s->contents == NULL)
7782 return FALSE;
7783 }
7784
7785 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7786 {
7787 if (!is_ppc64_elf_target (ibfd->xvec))
7788 continue;
7789
7790 s = ppc64_elf_tdata (ibfd)->got;
7791 if (s != NULL && s != htab->got)
7792 {
7793 if (s->size == 0)
7794 s->flags |= SEC_EXCLUDE;
7795 else
7796 {
7797 s->contents = bfd_zalloc (ibfd, s->size);
7798 if (s->contents == NULL)
7799 return FALSE;
7800 }
7801 }
7802 s = ppc64_elf_tdata (ibfd)->relgot;
7803 if (s != NULL)
7804 {
7805 if (s->size == 0)
7806 s->flags |= SEC_EXCLUDE;
7807 else
7808 {
7809 s->contents = bfd_zalloc (ibfd, s->size);
7810 if (s->contents == NULL)
7811 return FALSE;
7812 relocs = TRUE;
7813 s->reloc_count = 0;
7814 }
7815 }
7816 }
7817
7818 if (htab->elf.dynamic_sections_created)
7819 {
7820 /* Add some entries to the .dynamic section. We fill in the
7821 values later, in ppc64_elf_finish_dynamic_sections, but we
7822 must add the entries now so that we get the correct size for
7823 the .dynamic section. The DT_DEBUG entry is filled in by the
7824 dynamic linker and used by the debugger. */
7825 #define add_dynamic_entry(TAG, VAL) \
7826 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7827
7828 if (info->executable)
7829 {
7830 if (!add_dynamic_entry (DT_DEBUG, 0))
7831 return FALSE;
7832 }
7833
7834 if (htab->plt != NULL && htab->plt->size != 0)
7835 {
7836 if (!add_dynamic_entry (DT_PLTGOT, 0)
7837 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7838 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7839 || !add_dynamic_entry (DT_JMPREL, 0)
7840 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7841 return FALSE;
7842 }
7843
7844 if (NO_OPD_RELOCS)
7845 {
7846 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7847 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7848 return FALSE;
7849 }
7850
7851 if (relocs)
7852 {
7853 if (!add_dynamic_entry (DT_RELA, 0)
7854 || !add_dynamic_entry (DT_RELASZ, 0)
7855 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7856 return FALSE;
7857
7858 /* If any dynamic relocs apply to a read-only section,
7859 then we need a DT_TEXTREL entry. */
7860 if ((info->flags & DF_TEXTREL) == 0)
7861 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7862
7863 if ((info->flags & DF_TEXTREL) != 0)
7864 {
7865 if (!add_dynamic_entry (DT_TEXTREL, 0))
7866 return FALSE;
7867 }
7868 }
7869 }
7870 #undef add_dynamic_entry
7871
7872 return TRUE;
7873 }
7874
7875 /* Determine the type of stub needed, if any, for a call. */
7876
7877 static inline enum ppc_stub_type
7878 ppc_type_of_stub (asection *input_sec,
7879 const Elf_Internal_Rela *rel,
7880 struct ppc_link_hash_entry **hash,
7881 bfd_vma destination)
7882 {
7883 struct ppc_link_hash_entry *h = *hash;
7884 bfd_vma location;
7885 bfd_vma branch_offset;
7886 bfd_vma max_branch_offset;
7887 enum elf_ppc64_reloc_type r_type;
7888
7889 if (h != NULL)
7890 {
7891 if (h->oh != NULL
7892 && h->oh->is_func_descriptor)
7893 h = h->oh;
7894
7895 if (h->elf.dynindx != -1)
7896 {
7897 struct plt_entry *ent;
7898
7899 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7900 if (ent->addend == rel->r_addend
7901 && ent->plt.offset != (bfd_vma) -1)
7902 {
7903 *hash = h;
7904 return ppc_stub_plt_call;
7905 }
7906 }
7907
7908 if (!(h->elf.root.type == bfd_link_hash_defined
7909 || h->elf.root.type == bfd_link_hash_defweak)
7910 || h->elf.root.u.def.section->output_section == NULL)
7911 return ppc_stub_none;
7912 }
7913
7914 /* Determine where the call point is. */
7915 location = (input_sec->output_offset
7916 + input_sec->output_section->vma
7917 + rel->r_offset);
7918
7919 branch_offset = destination - location;
7920 r_type = ELF64_R_TYPE (rel->r_info);
7921
7922 /* Determine if a long branch stub is needed. */
7923 max_branch_offset = 1 << 25;
7924 if (r_type != R_PPC64_REL24)
7925 max_branch_offset = 1 << 15;
7926
7927 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7928 /* We need a stub. Figure out whether a long_branch or plt_branch
7929 is needed later. */
7930 return ppc_stub_long_branch;
7931
7932 return ppc_stub_none;
7933 }
7934
7935 /* Build a .plt call stub. */
7936
7937 static inline bfd_byte *
7938 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7939 {
7940 #define PPC_LO(v) ((v) & 0xffff)
7941 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7942 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7943
7944 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7945 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7946 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7947 if (PPC_HA (offset + 8) != PPC_HA (offset))
7948 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7949 offset += 8;
7950 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7951 if (PPC_HA (offset + 8) != PPC_HA (offset))
7952 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7953 offset += 8;
7954 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7955 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7956 bfd_put_32 (obfd, BCTR, p), p += 4;
7957 return p;
7958 }
7959
7960 static bfd_boolean
7961 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7962 {
7963 struct ppc_stub_hash_entry *stub_entry;
7964 struct ppc_branch_hash_entry *br_entry;
7965 struct bfd_link_info *info;
7966 struct ppc_link_hash_table *htab;
7967 bfd_byte *loc;
7968 bfd_byte *p;
7969 unsigned int indx;
7970 struct plt_entry *ent;
7971 bfd_vma dest, off;
7972 int size;
7973
7974 /* Massage our args to the form they really have. */
7975 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7976 info = in_arg;
7977
7978 htab = ppc_hash_table (info);
7979
7980 /* Make a note of the offset within the stubs for this entry. */
7981 stub_entry->stub_offset = stub_entry->stub_sec->size;
7982 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7983
7984 htab->stub_count[stub_entry->stub_type - 1] += 1;
7985 switch (stub_entry->stub_type)
7986 {
7987 case ppc_stub_long_branch:
7988 case ppc_stub_long_branch_r2off:
7989 /* Branches are relative. This is where we are going to. */
7990 off = dest = (stub_entry->target_value
7991 + stub_entry->target_section->output_offset
7992 + stub_entry->target_section->output_section->vma);
7993
7994 /* And this is where we are coming from. */
7995 off -= (stub_entry->stub_offset
7996 + stub_entry->stub_sec->output_offset
7997 + stub_entry->stub_sec->output_section->vma);
7998
7999 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8000 size = 4;
8001 else
8002 {
8003 bfd_vma r2off;
8004
8005 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8006 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8007 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8008 loc += 4;
8009 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8010 loc += 4;
8011 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8012 loc += 4;
8013 off -= 12;
8014 size = 16;
8015 }
8016 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8017
8018 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8019 {
8020 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8021 stub_entry->root.string);
8022 htab->stub_error = TRUE;
8023 return FALSE;
8024 }
8025
8026 if (info->emitrelocations)
8027 {
8028 Elf_Internal_Rela *relocs, *r;
8029 struct bfd_elf_section_data *elfsec_data;
8030
8031 elfsec_data = elf_section_data (stub_entry->stub_sec);
8032 relocs = elfsec_data->relocs;
8033 if (relocs == NULL)
8034 {
8035 bfd_size_type relsize;
8036 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8037 relocs = bfd_alloc (htab->stub_bfd, relsize);
8038 if (relocs == NULL)
8039 return FALSE;
8040 elfsec_data->relocs = relocs;
8041 elfsec_data->rel_hdr.sh_size = relsize;
8042 elfsec_data->rel_hdr.sh_entsize = 24;
8043 stub_entry->stub_sec->reloc_count = 0;
8044 }
8045 r = relocs + stub_entry->stub_sec->reloc_count;
8046 stub_entry->stub_sec->reloc_count += 1;
8047 r->r_offset = loc - stub_entry->stub_sec->contents;
8048 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8049 r->r_addend = dest;
8050 if (stub_entry->h != NULL)
8051 {
8052 struct elf_link_hash_entry **hashes;
8053 unsigned long symndx;
8054 struct ppc_link_hash_entry *h;
8055
8056 hashes = elf_sym_hashes (htab->stub_bfd);
8057 if (hashes == NULL)
8058 {
8059 bfd_size_type hsize;
8060
8061 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8062 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8063 if (hashes == NULL)
8064 return FALSE;
8065 elf_sym_hashes (htab->stub_bfd) = hashes;
8066 htab->stub_globals = 1;
8067 }
8068 symndx = htab->stub_globals++;
8069 h = stub_entry->h;
8070 hashes[symndx] = &h->elf;
8071 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8072 if (h->oh != NULL && h->oh->is_func)
8073 h = h->oh;
8074 if (h->elf.root.u.def.section != stub_entry->target_section)
8075 /* H is an opd symbol. The addend must be zero. */
8076 r->r_addend = 0;
8077 else
8078 {
8079 off = (h->elf.root.u.def.value
8080 + h->elf.root.u.def.section->output_offset
8081 + h->elf.root.u.def.section->output_section->vma);
8082 r->r_addend -= off;
8083 }
8084 }
8085 }
8086 break;
8087
8088 case ppc_stub_plt_branch:
8089 case ppc_stub_plt_branch_r2off:
8090 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8091 stub_entry->root.string + 9,
8092 FALSE, FALSE);
8093 if (br_entry == NULL)
8094 {
8095 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8096 stub_entry->root.string);
8097 htab->stub_error = TRUE;
8098 return FALSE;
8099 }
8100
8101 off = (stub_entry->target_value
8102 + stub_entry->target_section->output_offset
8103 + stub_entry->target_section->output_section->vma);
8104
8105 bfd_put_64 (htab->brlt->owner, off,
8106 htab->brlt->contents + br_entry->offset);
8107
8108 if (htab->relbrlt != NULL)
8109 {
8110 /* Create a reloc for the branch lookup table entry. */
8111 Elf_Internal_Rela rela;
8112 bfd_byte *rl;
8113
8114 rela.r_offset = (br_entry->offset
8115 + htab->brlt->output_offset
8116 + htab->brlt->output_section->vma);
8117 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8118 rela.r_addend = off;
8119
8120 rl = htab->relbrlt->contents;
8121 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8122 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8123 }
8124
8125 off = (br_entry->offset
8126 + htab->brlt->output_offset
8127 + htab->brlt->output_section->vma
8128 - elf_gp (htab->brlt->output_section->owner)
8129 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8130
8131 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8132 {
8133 (*_bfd_error_handler)
8134 (_("linkage table error against `%s'"),
8135 stub_entry->root.string);
8136 bfd_set_error (bfd_error_bad_value);
8137 htab->stub_error = TRUE;
8138 return FALSE;
8139 }
8140
8141 indx = off;
8142 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8143 {
8144 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8145 loc += 4;
8146 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8147 size = 16;
8148 }
8149 else
8150 {
8151 bfd_vma r2off;
8152
8153 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8154 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8155 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8156 loc += 4;
8157 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8158 loc += 4;
8159 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8160 loc += 4;
8161 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8162 loc += 4;
8163 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8164 size = 28;
8165 }
8166 loc += 4;
8167 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8168 loc += 4;
8169 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8170 break;
8171
8172 case ppc_stub_plt_call:
8173 /* Do the best we can for shared libraries built without
8174 exporting ".foo" for each "foo". This can happen when symbol
8175 versioning scripts strip all bar a subset of symbols. */
8176 if (stub_entry->h->oh != NULL
8177 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8178 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8179 {
8180 /* Point the symbol at the stub. There may be multiple stubs,
8181 we don't really care; The main thing is to make this sym
8182 defined somewhere. Maybe defining the symbol in the stub
8183 section is a silly idea. If we didn't do this, htab->top_id
8184 could disappear. */
8185 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8186 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8187 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8188 }
8189
8190 /* Now build the stub. */
8191 off = (bfd_vma) -1;
8192 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8193 if (ent->addend == stub_entry->addend)
8194 {
8195 off = ent->plt.offset;
8196 break;
8197 }
8198 if (off >= (bfd_vma) -2)
8199 abort ();
8200
8201 off &= ~ (bfd_vma) 1;
8202 off += (htab->plt->output_offset
8203 + htab->plt->output_section->vma
8204 - elf_gp (htab->plt->output_section->owner)
8205 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8206
8207 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8208 {
8209 (*_bfd_error_handler)
8210 (_("linkage table error against `%s'"),
8211 stub_entry->h->elf.root.root.string);
8212 bfd_set_error (bfd_error_bad_value);
8213 htab->stub_error = TRUE;
8214 return FALSE;
8215 }
8216
8217 p = build_plt_stub (htab->stub_bfd, loc, off);
8218 size = p - loc;
8219 break;
8220
8221 default:
8222 BFD_FAIL ();
8223 return FALSE;
8224 }
8225
8226 stub_entry->stub_sec->size += size;
8227
8228 if (htab->emit_stub_syms)
8229 {
8230 struct elf_link_hash_entry *h;
8231 size_t len1, len2;
8232 char *name;
8233 const char *const stub_str[] = { "long_branch",
8234 "long_branch_r2off",
8235 "plt_branch",
8236 "plt_branch_r2off",
8237 "plt_call" };
8238
8239 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8240 len2 = strlen (stub_entry->root.string);
8241 name = bfd_malloc (len1 + len2 + 2);
8242 if (name == NULL)
8243 return FALSE;
8244 memcpy (name, stub_entry->root.string, 9);
8245 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8246 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8247 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8248 if (h == NULL)
8249 return FALSE;
8250 if (h->root.type == bfd_link_hash_new)
8251 {
8252 h->root.type = bfd_link_hash_defined;
8253 h->root.u.def.section = stub_entry->stub_sec;
8254 h->root.u.def.value = stub_entry->stub_offset;
8255 h->ref_regular = 1;
8256 h->def_regular = 1;
8257 h->ref_regular_nonweak = 1;
8258 h->forced_local = 1;
8259 h->non_elf = 0;
8260 }
8261 }
8262
8263 return TRUE;
8264 }
8265
8266 /* As above, but don't actually build the stub. Just bump offset so
8267 we know stub section sizes, and select plt_branch stubs where
8268 long_branch stubs won't do. */
8269
8270 static bfd_boolean
8271 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8272 {
8273 struct ppc_stub_hash_entry *stub_entry;
8274 struct bfd_link_info *info;
8275 struct ppc_link_hash_table *htab;
8276 bfd_vma off;
8277 int size;
8278
8279 /* Massage our args to the form they really have. */
8280 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8281 info = in_arg;
8282
8283 htab = ppc_hash_table (info);
8284
8285 if (stub_entry->stub_type == ppc_stub_plt_call)
8286 {
8287 struct plt_entry *ent;
8288 off = (bfd_vma) -1;
8289 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8290 if (ent->addend == stub_entry->addend)
8291 {
8292 off = ent->plt.offset & ~(bfd_vma) 1;
8293 break;
8294 }
8295 if (off >= (bfd_vma) -2)
8296 abort ();
8297 off += (htab->plt->output_offset
8298 + htab->plt->output_section->vma
8299 - elf_gp (htab->plt->output_section->owner)
8300 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8301
8302 size = PLT_CALL_STUB_SIZE;
8303 if (PPC_HA (off + 16) != PPC_HA (off))
8304 size += 4;
8305 }
8306 else
8307 {
8308 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8309 variants. */
8310 off = (stub_entry->target_value
8311 + stub_entry->target_section->output_offset
8312 + stub_entry->target_section->output_section->vma);
8313 off -= (stub_entry->stub_sec->size
8314 + stub_entry->stub_sec->output_offset
8315 + stub_entry->stub_sec->output_section->vma);
8316
8317 /* Reset the stub type from the plt variant in case we now
8318 can reach with a shorter stub. */
8319 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8320 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8321
8322 size = 4;
8323 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8324 {
8325 off -= 12;
8326 size = 16;
8327 }
8328
8329 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8330 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8331 {
8332 struct ppc_branch_hash_entry *br_entry;
8333
8334 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8335 stub_entry->root.string + 9,
8336 TRUE, FALSE);
8337 if (br_entry == NULL)
8338 {
8339 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8340 stub_entry->root.string);
8341 htab->stub_error = TRUE;
8342 return FALSE;
8343 }
8344
8345 if (br_entry->iter != htab->stub_iteration)
8346 {
8347 br_entry->iter = htab->stub_iteration;
8348 br_entry->offset = htab->brlt->size;
8349 htab->brlt->size += 8;
8350
8351 if (htab->relbrlt != NULL)
8352 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8353 }
8354
8355 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8356 size = 16;
8357 if (stub_entry->stub_type != ppc_stub_plt_branch)
8358 size = 28;
8359 }
8360
8361 if (info->emitrelocations
8362 && (stub_entry->stub_type == ppc_stub_long_branch
8363 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8364 stub_entry->stub_sec->reloc_count += 1;
8365 }
8366
8367 stub_entry->stub_sec->size += size;
8368 return TRUE;
8369 }
8370
8371 /* Set up various things so that we can make a list of input sections
8372 for each output section included in the link. Returns -1 on error,
8373 0 when no stubs will be needed, and 1 on success. */
8374
8375 int
8376 ppc64_elf_setup_section_lists (bfd *output_bfd,
8377 struct bfd_link_info *info,
8378 int no_multi_toc)
8379 {
8380 bfd *input_bfd;
8381 int top_id, top_index, id;
8382 asection *section;
8383 asection **input_list;
8384 bfd_size_type amt;
8385 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8386
8387 htab->no_multi_toc = no_multi_toc;
8388
8389 if (htab->brlt == NULL)
8390 return 0;
8391
8392 /* Find the top input section id. */
8393 for (input_bfd = info->input_bfds, top_id = 3;
8394 input_bfd != NULL;
8395 input_bfd = input_bfd->link_next)
8396 {
8397 for (section = input_bfd->sections;
8398 section != NULL;
8399 section = section->next)
8400 {
8401 if (top_id < section->id)
8402 top_id = section->id;
8403 }
8404 }
8405
8406 htab->top_id = top_id;
8407 amt = sizeof (struct map_stub) * (top_id + 1);
8408 htab->stub_group = bfd_zmalloc (amt);
8409 if (htab->stub_group == NULL)
8410 return -1;
8411
8412 /* Set toc_off for com, und, abs and ind sections. */
8413 for (id = 0; id < 3; id++)
8414 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8415
8416 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8417
8418 /* We can't use output_bfd->section_count here to find the top output
8419 section index as some sections may have been removed, and
8420 strip_excluded_output_sections doesn't renumber the indices. */
8421 for (section = output_bfd->sections, top_index = 0;
8422 section != NULL;
8423 section = section->next)
8424 {
8425 if (top_index < section->index)
8426 top_index = section->index;
8427 }
8428
8429 htab->top_index = top_index;
8430 amt = sizeof (asection *) * (top_index + 1);
8431 input_list = bfd_zmalloc (amt);
8432 htab->input_list = input_list;
8433 if (input_list == NULL)
8434 return -1;
8435
8436 return 1;
8437 }
8438
8439 /* The linker repeatedly calls this function for each TOC input section
8440 and linker generated GOT section. Group input bfds such that the toc
8441 within a group is less than 64k in size. Will break with cute linker
8442 scripts that play games with dot in the output toc section. */
8443
8444 void
8445 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8446 {
8447 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8448
8449 if (!htab->no_multi_toc)
8450 {
8451 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8452 bfd_vma off = addr - htab->toc_curr;
8453
8454 if (off + isec->size > 0x10000)
8455 htab->toc_curr = addr;
8456
8457 elf_gp (isec->owner) = (htab->toc_curr
8458 - elf_gp (isec->output_section->owner)
8459 + TOC_BASE_OFF);
8460 }
8461 }
8462
8463 /* Called after the last call to the above function. */
8464
8465 void
8466 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8467 {
8468 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8469
8470 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8471
8472 /* toc_curr tracks the TOC offset used for code sections below in
8473 ppc64_elf_next_input_section. Start off at 0x8000. */
8474 htab->toc_curr = TOC_BASE_OFF;
8475 }
8476
8477 /* No toc references were found in ISEC. If the code in ISEC makes no
8478 calls, then there's no need to use toc adjusting stubs when branching
8479 into ISEC. Actually, indirect calls from ISEC are OK as they will
8480 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8481 needed, and 2 if a cyclical call-graph was found but no other reason
8482 for a stub was detected. If called from the top level, a return of
8483 2 means the same as a return of 0. */
8484
8485 static int
8486 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8487 {
8488 Elf_Internal_Rela *relstart, *rel;
8489 Elf_Internal_Sym *local_syms;
8490 int ret;
8491 struct ppc_link_hash_table *htab;
8492
8493 /* We know none of our code bearing sections will need toc stubs. */
8494 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8495 return 0;
8496
8497 if (isec->size == 0)
8498 return 0;
8499
8500 if (isec->output_section == NULL)
8501 return 0;
8502
8503 /* Hack for linux kernel. .fixup contains branches, but only back to
8504 the function that hit an exception. */
8505 if (strcmp (isec->name, ".fixup") == 0)
8506 return 0;
8507
8508 if (isec->reloc_count == 0)
8509 return 0;
8510
8511 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8512 info->keep_memory);
8513 if (relstart == NULL)
8514 return -1;
8515
8516 /* Look for branches to outside of this section. */
8517 local_syms = NULL;
8518 ret = 0;
8519 htab = ppc_hash_table (info);
8520 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8521 {
8522 enum elf_ppc64_reloc_type r_type;
8523 unsigned long r_symndx;
8524 struct elf_link_hash_entry *h;
8525 Elf_Internal_Sym *sym;
8526 asection *sym_sec;
8527 long *opd_adjust;
8528 bfd_vma sym_value;
8529 bfd_vma dest;
8530
8531 r_type = ELF64_R_TYPE (rel->r_info);
8532 if (r_type != R_PPC64_REL24
8533 && r_type != R_PPC64_REL14
8534 && r_type != R_PPC64_REL14_BRTAKEN
8535 && r_type != R_PPC64_REL14_BRNTAKEN)
8536 continue;
8537
8538 r_symndx = ELF64_R_SYM (rel->r_info);
8539 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8540 isec->owner))
8541 {
8542 ret = -1;
8543 break;
8544 }
8545
8546 /* Calls to dynamic lib functions go through a plt call stub
8547 that uses r2. Branches to undefined symbols might be a call
8548 using old-style dot symbols that can be satisfied by a plt
8549 call into a new-style dynamic library. */
8550 if (sym_sec == NULL)
8551 {
8552 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8553 if (eh != NULL
8554 && eh->oh != NULL
8555 && eh->oh->elf.plt.plist != NULL)
8556 {
8557 ret = 1;
8558 break;
8559 }
8560
8561 /* Ignore other undefined symbols. */
8562 continue;
8563 }
8564
8565 /* Assume branches to other sections not included in the link need
8566 stubs too, to cover -R and absolute syms. */
8567 if (sym_sec->output_section == NULL)
8568 {
8569 ret = 1;
8570 break;
8571 }
8572
8573 if (h == NULL)
8574 sym_value = sym->st_value;
8575 else
8576 {
8577 if (h->root.type != bfd_link_hash_defined
8578 && h->root.type != bfd_link_hash_defweak)
8579 abort ();
8580 sym_value = h->root.u.def.value;
8581 }
8582 sym_value += rel->r_addend;
8583
8584 /* If this branch reloc uses an opd sym, find the code section. */
8585 opd_adjust = get_opd_info (sym_sec);
8586 if (opd_adjust != NULL)
8587 {
8588 if (h == NULL)
8589 {
8590 long adjust;
8591
8592 adjust = opd_adjust[sym->st_value / 8];
8593 if (adjust == -1)
8594 /* Assume deleted functions won't ever be called. */
8595 continue;
8596 sym_value += adjust;
8597 }
8598
8599 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8600 if (dest == (bfd_vma) -1)
8601 continue;
8602 }
8603 else
8604 dest = (sym_value
8605 + sym_sec->output_offset
8606 + sym_sec->output_section->vma);
8607
8608 /* Ignore branch to self. */
8609 if (sym_sec == isec)
8610 continue;
8611
8612 /* If the called function uses the toc, we need a stub. */
8613 if (sym_sec->has_toc_reloc
8614 || sym_sec->makes_toc_func_call)
8615 {
8616 ret = 1;
8617 break;
8618 }
8619
8620 /* Assume any branch that needs a long branch stub might in fact
8621 need a plt_branch stub. A plt_branch stub uses r2. */
8622 else if (dest - (isec->output_offset
8623 + isec->output_section->vma
8624 + rel->r_offset) + (1 << 25) >= (2 << 25))
8625 {
8626 ret = 1;
8627 break;
8628 }
8629
8630 /* If calling back to a section in the process of being tested, we
8631 can't say for sure that no toc adjusting stubs are needed, so
8632 don't return zero. */
8633 else if (sym_sec->call_check_in_progress)
8634 ret = 2;
8635
8636 /* Branches to another section that itself doesn't have any TOC
8637 references are OK. Recursively call ourselves to check. */
8638 else if (sym_sec->id <= htab->top_id
8639 && htab->stub_group[sym_sec->id].toc_off == 0)
8640 {
8641 int recur;
8642
8643 /* Mark current section as indeterminate, so that other
8644 sections that call back to current won't be marked as
8645 known. */
8646 isec->call_check_in_progress = 1;
8647 recur = toc_adjusting_stub_needed (info, sym_sec);
8648 isec->call_check_in_progress = 0;
8649
8650 if (recur < 0)
8651 {
8652 /* An error. Exit. */
8653 ret = -1;
8654 break;
8655 }
8656 else if (recur <= 1)
8657 {
8658 /* Known result. Mark as checked and set section flag. */
8659 htab->stub_group[sym_sec->id].toc_off = 1;
8660 if (recur != 0)
8661 {
8662 sym_sec->makes_toc_func_call = 1;
8663 ret = 1;
8664 break;
8665 }
8666 }
8667 else
8668 {
8669 /* Unknown result. Continue checking. */
8670 ret = 2;
8671 }
8672 }
8673 }
8674
8675 if (local_syms != NULL
8676 && (elf_tdata (isec->owner)->symtab_hdr.contents
8677 != (unsigned char *) local_syms))
8678 free (local_syms);
8679 if (elf_section_data (isec)->relocs != relstart)
8680 free (relstart);
8681
8682 return ret;
8683 }
8684
8685 /* The linker repeatedly calls this function for each input section,
8686 in the order that input sections are linked into output sections.
8687 Build lists of input sections to determine groupings between which
8688 we may insert linker stubs. */
8689
8690 bfd_boolean
8691 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8692 {
8693 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8694
8695 if ((isec->output_section->flags & SEC_CODE) != 0
8696 && isec->output_section->index <= htab->top_index)
8697 {
8698 asection **list = htab->input_list + isec->output_section->index;
8699 /* Steal the link_sec pointer for our list. */
8700 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8701 /* This happens to make the list in reverse order,
8702 which is what we want. */
8703 PREV_SEC (isec) = *list;
8704 *list = isec;
8705 }
8706
8707 if (htab->multi_toc_needed)
8708 {
8709 /* If a code section has a function that uses the TOC then we need
8710 to use the right TOC (obviously). Also, make sure that .opd gets
8711 the correct TOC value for R_PPC64_TOC relocs that don't have or
8712 can't find their function symbol (shouldn't ever happen now). */
8713 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8714 {
8715 if (elf_gp (isec->owner) != 0)
8716 htab->toc_curr = elf_gp (isec->owner);
8717 }
8718 else if (htab->stub_group[isec->id].toc_off == 0)
8719 {
8720 int ret = toc_adjusting_stub_needed (info, isec);
8721 if (ret < 0)
8722 return FALSE;
8723 else
8724 isec->makes_toc_func_call = ret & 1;
8725 }
8726 }
8727
8728 /* Functions that don't use the TOC can belong in any TOC group.
8729 Use the last TOC base. This happens to make _init and _fini
8730 pasting work. */
8731 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8732 return TRUE;
8733 }
8734
8735 /* See whether we can group stub sections together. Grouping stub
8736 sections may result in fewer stubs. More importantly, we need to
8737 put all .init* and .fini* stubs at the beginning of the .init or
8738 .fini output sections respectively, because glibc splits the
8739 _init and _fini functions into multiple parts. Putting a stub in
8740 the middle of a function is not a good idea. */
8741
8742 static void
8743 group_sections (struct ppc_link_hash_table *htab,
8744 bfd_size_type stub_group_size,
8745 bfd_boolean stubs_always_before_branch)
8746 {
8747 asection **list = htab->input_list + htab->top_index;
8748 do
8749 {
8750 asection *tail = *list;
8751 while (tail != NULL)
8752 {
8753 asection *curr;
8754 asection *prev;
8755 bfd_size_type total;
8756 bfd_boolean big_sec;
8757 bfd_vma curr_toc;
8758
8759 curr = tail;
8760 total = tail->size;
8761 big_sec = total > stub_group_size;
8762 if (big_sec)
8763 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
8764 tail->owner, tail);
8765 curr_toc = htab->stub_group[tail->id].toc_off;
8766
8767 while ((prev = PREV_SEC (curr)) != NULL
8768 && ((total += curr->output_offset - prev->output_offset)
8769 < stub_group_size)
8770 && htab->stub_group[prev->id].toc_off == curr_toc)
8771 curr = prev;
8772
8773 /* OK, the size from the start of CURR to the end is less
8774 than stub_group_size and thus can be handled by one stub
8775 section. (or the tail section is itself larger than
8776 stub_group_size, in which case we may be toast.) We
8777 should really be keeping track of the total size of stubs
8778 added here, as stubs contribute to the final output
8779 section size. That's a little tricky, and this way will
8780 only break if stubs added make the total size more than
8781 2^25, ie. for the default stub_group_size, if stubs total
8782 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8783 do
8784 {
8785 prev = PREV_SEC (tail);
8786 /* Set up this stub group. */
8787 htab->stub_group[tail->id].link_sec = curr;
8788 }
8789 while (tail != curr && (tail = prev) != NULL);
8790
8791 /* But wait, there's more! Input sections up to stub_group_size
8792 bytes before the stub section can be handled by it too.
8793 Don't do this if we have a really large section after the
8794 stubs, as adding more stubs increases the chance that
8795 branches may not reach into the stub section. */
8796 if (!stubs_always_before_branch && !big_sec)
8797 {
8798 total = 0;
8799 while (prev != NULL
8800 && ((total += tail->output_offset - prev->output_offset)
8801 < stub_group_size)
8802 && htab->stub_group[prev->id].toc_off == curr_toc)
8803 {
8804 tail = prev;
8805 prev = PREV_SEC (tail);
8806 htab->stub_group[tail->id].link_sec = curr;
8807 }
8808 }
8809 tail = prev;
8810 }
8811 }
8812 while (list-- != htab->input_list);
8813 free (htab->input_list);
8814 #undef PREV_SEC
8815 }
8816
8817 /* Determine and set the size of the stub section for a final link.
8818
8819 The basic idea here is to examine all the relocations looking for
8820 PC-relative calls to a target that is unreachable with a "bl"
8821 instruction. */
8822
8823 bfd_boolean
8824 ppc64_elf_size_stubs (bfd *output_bfd,
8825 struct bfd_link_info *info,
8826 bfd_signed_vma group_size,
8827 asection *(*add_stub_section) (const char *, asection *),
8828 void (*layout_sections_again) (void))
8829 {
8830 bfd_size_type stub_group_size;
8831 bfd_boolean stubs_always_before_branch;
8832 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8833
8834 /* Stash our params away. */
8835 htab->add_stub_section = add_stub_section;
8836 htab->layout_sections_again = layout_sections_again;
8837 stubs_always_before_branch = group_size < 0;
8838 if (group_size < 0)
8839 stub_group_size = -group_size;
8840 else
8841 stub_group_size = group_size;
8842 if (stub_group_size == 1)
8843 {
8844 /* Default values. */
8845 if (stubs_always_before_branch)
8846 {
8847 stub_group_size = 0x1e00000;
8848 if (htab->has_14bit_branch)
8849 stub_group_size = 0x7800;
8850 }
8851 else
8852 {
8853 stub_group_size = 0x1c00000;
8854 if (htab->has_14bit_branch)
8855 stub_group_size = 0x7000;
8856 }
8857 }
8858
8859 group_sections (htab, stub_group_size, stubs_always_before_branch);
8860
8861 while (1)
8862 {
8863 bfd *input_bfd;
8864 unsigned int bfd_indx;
8865 asection *stub_sec;
8866
8867 htab->stub_iteration += 1;
8868
8869 for (input_bfd = info->input_bfds, bfd_indx = 0;
8870 input_bfd != NULL;
8871 input_bfd = input_bfd->link_next, bfd_indx++)
8872 {
8873 Elf_Internal_Shdr *symtab_hdr;
8874 asection *section;
8875 Elf_Internal_Sym *local_syms = NULL;
8876
8877 /* We'll need the symbol table in a second. */
8878 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8879 if (symtab_hdr->sh_info == 0)
8880 continue;
8881
8882 /* Walk over each section attached to the input bfd. */
8883 for (section = input_bfd->sections;
8884 section != NULL;
8885 section = section->next)
8886 {
8887 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8888
8889 /* If there aren't any relocs, then there's nothing more
8890 to do. */
8891 if ((section->flags & SEC_RELOC) == 0
8892 || section->reloc_count == 0)
8893 continue;
8894
8895 /* If this section is a link-once section that will be
8896 discarded, then don't create any stubs. */
8897 if (section->output_section == NULL
8898 || section->output_section->owner != output_bfd)
8899 continue;
8900
8901 /* Get the relocs. */
8902 internal_relocs
8903 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8904 info->keep_memory);
8905 if (internal_relocs == NULL)
8906 goto error_ret_free_local;
8907
8908 /* Now examine each relocation. */
8909 irela = internal_relocs;
8910 irelaend = irela + section->reloc_count;
8911 for (; irela < irelaend; irela++)
8912 {
8913 enum elf_ppc64_reloc_type r_type;
8914 unsigned int r_indx;
8915 enum ppc_stub_type stub_type;
8916 struct ppc_stub_hash_entry *stub_entry;
8917 asection *sym_sec, *code_sec;
8918 bfd_vma sym_value;
8919 bfd_vma destination;
8920 bfd_boolean ok_dest;
8921 struct ppc_link_hash_entry *hash;
8922 struct ppc_link_hash_entry *fdh;
8923 struct elf_link_hash_entry *h;
8924 Elf_Internal_Sym *sym;
8925 char *stub_name;
8926 const asection *id_sec;
8927 long *opd_adjust;
8928
8929 r_type = ELF64_R_TYPE (irela->r_info);
8930 r_indx = ELF64_R_SYM (irela->r_info);
8931
8932 if (r_type >= R_PPC64_max)
8933 {
8934 bfd_set_error (bfd_error_bad_value);
8935 goto error_ret_free_internal;
8936 }
8937
8938 /* Only look for stubs on branch instructions. */
8939 if (r_type != R_PPC64_REL24
8940 && r_type != R_PPC64_REL14
8941 && r_type != R_PPC64_REL14_BRTAKEN
8942 && r_type != R_PPC64_REL14_BRNTAKEN)
8943 continue;
8944
8945 /* Now determine the call target, its name, value,
8946 section. */
8947 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8948 r_indx, input_bfd))
8949 goto error_ret_free_internal;
8950 hash = (struct ppc_link_hash_entry *) h;
8951
8952 ok_dest = FALSE;
8953 fdh = NULL;
8954 if (hash == NULL)
8955 {
8956 sym_value = sym->st_value;
8957 ok_dest = TRUE;
8958 }
8959 else
8960 {
8961 sym_value = 0;
8962 /* Recognise an old ABI func code entry sym, and
8963 use the func descriptor sym instead. */
8964 if (hash->elf.root.root.string[0] == '.'
8965 && (fdh = get_fdh (hash, htab)) != NULL)
8966 {
8967 if (fdh->elf.root.type == bfd_link_hash_defined
8968 || fdh->elf.root.type == bfd_link_hash_defweak)
8969 {
8970 sym_sec = fdh->elf.root.u.def.section;
8971 sym_value = fdh->elf.root.u.def.value;
8972 if (sym_sec->output_section != NULL)
8973 ok_dest = TRUE;
8974 }
8975 else
8976 fdh = NULL;
8977 }
8978 else if (hash->elf.root.type == bfd_link_hash_defined
8979 || hash->elf.root.type == bfd_link_hash_defweak)
8980 {
8981 sym_value = hash->elf.root.u.def.value;
8982 if (sym_sec->output_section != NULL)
8983 ok_dest = TRUE;
8984 }
8985 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8986 ;
8987 else if (hash->elf.root.type == bfd_link_hash_undefined)
8988 ;
8989 else
8990 {
8991 bfd_set_error (bfd_error_bad_value);
8992 goto error_ret_free_internal;
8993 }
8994 }
8995
8996 destination = 0;
8997 if (ok_dest)
8998 {
8999 sym_value += irela->r_addend;
9000 destination = (sym_value
9001 + sym_sec->output_offset
9002 + sym_sec->output_section->vma);
9003 }
9004
9005 code_sec = sym_sec;
9006 opd_adjust = get_opd_info (sym_sec);
9007 if (opd_adjust != NULL)
9008 {
9009 bfd_vma dest;
9010
9011 if (hash == NULL)
9012 {
9013 long adjust = opd_adjust[sym_value / 8];
9014 if (adjust == -1)
9015 continue;
9016 sym_value += adjust;
9017 }
9018 dest = opd_entry_value (sym_sec, sym_value,
9019 &code_sec, &sym_value);
9020 if (dest != (bfd_vma) -1)
9021 {
9022 destination = dest;
9023 if (fdh != NULL)
9024 {
9025 /* Fixup old ABI sym to point at code
9026 entry. */
9027 hash->elf.root.type = bfd_link_hash_defweak;
9028 hash->elf.root.u.def.section = code_sec;
9029 hash->elf.root.u.def.value = sym_value;
9030 }
9031 }
9032 }
9033
9034 /* Determine what (if any) linker stub is needed. */
9035 stub_type = ppc_type_of_stub (section, irela, &hash,
9036 destination);
9037
9038 if (stub_type != ppc_stub_plt_call)
9039 {
9040 /* Check whether we need a TOC adjusting stub.
9041 Since the linker pastes together pieces from
9042 different object files when creating the
9043 _init and _fini functions, it may be that a
9044 call to what looks like a local sym is in
9045 fact a call needing a TOC adjustment. */
9046 if (code_sec != NULL
9047 && code_sec->output_section != NULL
9048 && (htab->stub_group[code_sec->id].toc_off
9049 != htab->stub_group[section->id].toc_off)
9050 && (code_sec->has_toc_reloc
9051 || code_sec->makes_toc_func_call))
9052 stub_type = ppc_stub_long_branch_r2off;
9053 }
9054
9055 if (stub_type == ppc_stub_none)
9056 continue;
9057
9058 /* __tls_get_addr calls might be eliminated. */
9059 if (stub_type != ppc_stub_plt_call
9060 && hash != NULL
9061 && (hash == htab->tls_get_addr
9062 || hash == htab->tls_get_addr_fd)
9063 && section->has_tls_reloc
9064 && irela != internal_relocs)
9065 {
9066 /* Get tls info. */
9067 char *tls_mask;
9068
9069 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9070 irela - 1, input_bfd))
9071 goto error_ret_free_internal;
9072 if (*tls_mask != 0)
9073 continue;
9074 }
9075
9076 /* Support for grouping stub sections. */
9077 id_sec = htab->stub_group[section->id].link_sec;
9078
9079 /* Get the name of this stub. */
9080 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9081 if (!stub_name)
9082 goto error_ret_free_internal;
9083
9084 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9085 stub_name, FALSE, FALSE);
9086 if (stub_entry != NULL)
9087 {
9088 /* The proper stub has already been created. */
9089 free (stub_name);
9090 continue;
9091 }
9092
9093 stub_entry = ppc_add_stub (stub_name, section, htab);
9094 if (stub_entry == NULL)
9095 {
9096 free (stub_name);
9097 error_ret_free_internal:
9098 if (elf_section_data (section)->relocs == NULL)
9099 free (internal_relocs);
9100 error_ret_free_local:
9101 if (local_syms != NULL
9102 && (symtab_hdr->contents
9103 != (unsigned char *) local_syms))
9104 free (local_syms);
9105 return FALSE;
9106 }
9107
9108 stub_entry->stub_type = stub_type;
9109 stub_entry->target_value = sym_value;
9110 stub_entry->target_section = code_sec;
9111 stub_entry->h = hash;
9112 stub_entry->addend = irela->r_addend;
9113
9114 if (stub_entry->h != NULL)
9115 htab->stub_globals += 1;
9116 }
9117
9118 /* We're done with the internal relocs, free them. */
9119 if (elf_section_data (section)->relocs != internal_relocs)
9120 free (internal_relocs);
9121 }
9122
9123 if (local_syms != NULL
9124 && symtab_hdr->contents != (unsigned char *) local_syms)
9125 {
9126 if (!info->keep_memory)
9127 free (local_syms);
9128 else
9129 symtab_hdr->contents = (unsigned char *) local_syms;
9130 }
9131 }
9132
9133 /* We may have added some stubs. Find out the new size of the
9134 stub sections. */
9135 for (stub_sec = htab->stub_bfd->sections;
9136 stub_sec != NULL;
9137 stub_sec = stub_sec->next)
9138 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9139 {
9140 stub_sec->rawsize = stub_sec->size;
9141 stub_sec->size = 0;
9142 stub_sec->reloc_count = 0;
9143 }
9144
9145 htab->brlt->size = 0;
9146 if (htab->relbrlt != NULL)
9147 htab->relbrlt->size = 0;
9148
9149 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9150
9151 for (stub_sec = htab->stub_bfd->sections;
9152 stub_sec != NULL;
9153 stub_sec = stub_sec->next)
9154 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9155 && stub_sec->rawsize != stub_sec->size)
9156 break;
9157
9158 /* Exit from this loop when no stubs have been added, and no stubs
9159 have changed size. */
9160 if (stub_sec == NULL)
9161 break;
9162
9163 /* Ask the linker to do its stuff. */
9164 (*htab->layout_sections_again) ();
9165 }
9166
9167 /* It would be nice to strip htab->brlt from the output if the
9168 section is empty, but it's too late. If we strip sections here,
9169 the dynamic symbol table is corrupted since the section symbol
9170 for the stripped section isn't written. */
9171
9172 return TRUE;
9173 }
9174
9175 /* Called after we have determined section placement. If sections
9176 move, we'll be called again. Provide a value for TOCstart. */
9177
9178 bfd_vma
9179 ppc64_elf_toc (bfd *obfd)
9180 {
9181 asection *s;
9182 bfd_vma TOCstart;
9183
9184 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9185 order. The TOC starts where the first of these sections starts. */
9186 s = bfd_get_section_by_name (obfd, ".got");
9187 if (s == NULL)
9188 s = bfd_get_section_by_name (obfd, ".toc");
9189 if (s == NULL)
9190 s = bfd_get_section_by_name (obfd, ".tocbss");
9191 if (s == NULL)
9192 s = bfd_get_section_by_name (obfd, ".plt");
9193 if (s == NULL)
9194 {
9195 /* This may happen for
9196 o references to TOC base (SYM@toc / TOC[tc0]) without a
9197 .toc directive
9198 o bad linker script
9199 o --gc-sections and empty TOC sections
9200
9201 FIXME: Warn user? */
9202
9203 /* Look for a likely section. We probably won't even be
9204 using TOCstart. */
9205 for (s = obfd->sections; s != NULL; s = s->next)
9206 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9207 == (SEC_ALLOC | SEC_SMALL_DATA))
9208 break;
9209 if (s == NULL)
9210 for (s = obfd->sections; s != NULL; s = s->next)
9211 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9212 == (SEC_ALLOC | SEC_SMALL_DATA))
9213 break;
9214 if (s == NULL)
9215 for (s = obfd->sections; s != NULL; s = s->next)
9216 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9217 break;
9218 if (s == NULL)
9219 for (s = obfd->sections; s != NULL; s = s->next)
9220 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9221 break;
9222 }
9223
9224 TOCstart = 0;
9225 if (s != NULL)
9226 TOCstart = s->output_section->vma + s->output_offset;
9227
9228 return TOCstart;
9229 }
9230
9231 /* Build all the stubs associated with the current output file.
9232 The stubs are kept in a hash table attached to the main linker
9233 hash table. This function is called via gldelf64ppc_finish. */
9234
9235 bfd_boolean
9236 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9237 struct bfd_link_info *info,
9238 char **stats)
9239 {
9240 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9241 asection *stub_sec;
9242 bfd_byte *p;
9243 int stub_sec_count = 0;
9244
9245 htab->emit_stub_syms = emit_stub_syms;
9246
9247 /* Allocate memory to hold the linker stubs. */
9248 for (stub_sec = htab->stub_bfd->sections;
9249 stub_sec != NULL;
9250 stub_sec = stub_sec->next)
9251 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9252 && stub_sec->size != 0)
9253 {
9254 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9255 if (stub_sec->contents == NULL)
9256 return FALSE;
9257 /* We want to check that built size is the same as calculated
9258 size. rawsize is a convenient location to use. */
9259 stub_sec->rawsize = stub_sec->size;
9260 stub_sec->size = 0;
9261 }
9262
9263 if (htab->plt != NULL)
9264 {
9265 unsigned int indx;
9266 bfd_vma plt0;
9267
9268 /* Build the .glink plt call stub. */
9269 plt0 = (htab->plt->output_section->vma
9270 + htab->plt->output_offset
9271 - (htab->glink->output_section->vma
9272 + htab->glink->output_offset
9273 + GLINK_CALL_STUB_SIZE));
9274 if (plt0 + 0x80008000 > 0xffffffff)
9275 {
9276 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9277 bfd_set_error (bfd_error_bad_value);
9278 return FALSE;
9279 }
9280
9281 if (htab->emit_stub_syms)
9282 {
9283 struct elf_link_hash_entry *h;
9284 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9285 if (h == NULL)
9286 return FALSE;
9287 if (h->root.type == bfd_link_hash_new)
9288 {
9289 h->root.type = bfd_link_hash_defined;
9290 h->root.u.def.section = htab->glink;
9291 h->root.u.def.value = 0;
9292 h->ref_regular = 1;
9293 h->def_regular = 1;
9294 h->ref_regular_nonweak = 1;
9295 h->forced_local = 1;
9296 h->non_elf = 0;
9297 }
9298 }
9299 p = htab->glink->contents;
9300 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9301 p += 4;
9302 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9303 p += 4;
9304 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9305 p += 4;
9306 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9307 p += 4;
9308 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9309 p += 4;
9310 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9311 p += 4;
9312 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9313 p += 4;
9314 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9315 p += 4;
9316 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9317 p += 4;
9318 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9319 p += 4;
9320 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9321 p += 4;
9322 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9323 p += 4;
9324 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9325 p += 4;
9326 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9327 p += 4;
9328 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9329 p += 4;
9330 bfd_put_32 (htab->glink->owner, BCTR, p);
9331 p += 4;
9332
9333 /* Build the .glink lazy link call stubs. */
9334 indx = 0;
9335 while (p < htab->glink->contents + htab->glink->size)
9336 {
9337 if (indx < 0x8000)
9338 {
9339 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9340 p += 4;
9341 }
9342 else
9343 {
9344 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9345 p += 4;
9346 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9347 p += 4;
9348 }
9349 bfd_put_32 (htab->glink->owner,
9350 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9351 indx++;
9352 p += 4;
9353 }
9354 htab->glink->rawsize = p - htab->glink->contents;
9355 }
9356
9357 if (htab->brlt->size != 0)
9358 {
9359 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9360 htab->brlt->size);
9361 if (htab->brlt->contents == NULL)
9362 return FALSE;
9363 }
9364 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9365 {
9366 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9367 htab->relbrlt->size);
9368 if (htab->relbrlt->contents == NULL)
9369 return FALSE;
9370 }
9371
9372 /* Build the stubs as directed by the stub hash table. */
9373 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9374
9375 for (stub_sec = htab->stub_bfd->sections;
9376 stub_sec != NULL;
9377 stub_sec = stub_sec->next)
9378 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9379 {
9380 stub_sec_count += 1;
9381 if (stub_sec->rawsize != stub_sec->size)
9382 break;
9383 }
9384
9385 if (stub_sec != NULL
9386 || htab->glink->rawsize != htab->glink->size)
9387 {
9388 htab->stub_error = TRUE;
9389 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9390 }
9391
9392 if (htab->stub_error)
9393 return FALSE;
9394
9395 if (stats != NULL)
9396 {
9397 *stats = bfd_malloc (500);
9398 if (*stats == NULL)
9399 return FALSE;
9400
9401 sprintf (*stats, _("linker stubs in %u group%s\n"
9402 " branch %lu\n"
9403 " toc adjust %lu\n"
9404 " long branch %lu\n"
9405 " long toc adj %lu\n"
9406 " plt call %lu"),
9407 stub_sec_count,
9408 stub_sec_count == 1 ? "" : "s",
9409 htab->stub_count[ppc_stub_long_branch - 1],
9410 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9411 htab->stub_count[ppc_stub_plt_branch - 1],
9412 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9413 htab->stub_count[ppc_stub_plt_call - 1]);
9414 }
9415 return TRUE;
9416 }
9417
9418 /* This function undoes the changes made by add_symbol_adjust. */
9419
9420 static bfd_boolean
9421 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9422 {
9423 struct ppc_link_hash_entry *eh;
9424
9425 if (h->root.type == bfd_link_hash_indirect)
9426 return TRUE;
9427
9428 if (h->root.type == bfd_link_hash_warning)
9429 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9430
9431 eh = (struct ppc_link_hash_entry *) h;
9432 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9433 return TRUE;
9434
9435 eh->elf.root.type = bfd_link_hash_undefined;
9436 return TRUE;
9437 }
9438
9439 void
9440 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9441 {
9442 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9443 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9444 }
9445
9446 /* The RELOCATE_SECTION function is called by the ELF backend linker
9447 to handle the relocations for a section.
9448
9449 The relocs are always passed as Rela structures; if the section
9450 actually uses Rel structures, the r_addend field will always be
9451 zero.
9452
9453 This function is responsible for adjust the section contents as
9454 necessary, and (if using Rela relocs and generating a
9455 relocatable output file) adjusting the reloc addend as
9456 necessary.
9457
9458 This function does not have to worry about setting the reloc
9459 address or the reloc symbol index.
9460
9461 LOCAL_SYMS is a pointer to the swapped in local symbols.
9462
9463 LOCAL_SECTIONS is an array giving the section in the input file
9464 corresponding to the st_shndx field of each local symbol.
9465
9466 The global hash table entry for the global symbols can be found
9467 via elf_sym_hashes (input_bfd).
9468
9469 When generating relocatable output, this function must handle
9470 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9471 going to be the section symbol corresponding to the output
9472 section, which means that the addend must be adjusted
9473 accordingly. */
9474
9475 static bfd_boolean
9476 ppc64_elf_relocate_section (bfd *output_bfd,
9477 struct bfd_link_info *info,
9478 bfd *input_bfd,
9479 asection *input_section,
9480 bfd_byte *contents,
9481 Elf_Internal_Rela *relocs,
9482 Elf_Internal_Sym *local_syms,
9483 asection **local_sections)
9484 {
9485 struct ppc_link_hash_table *htab;
9486 Elf_Internal_Shdr *symtab_hdr;
9487 struct elf_link_hash_entry **sym_hashes;
9488 Elf_Internal_Rela *rel;
9489 Elf_Internal_Rela *relend;
9490 Elf_Internal_Rela outrel;
9491 bfd_byte *loc;
9492 struct got_entry **local_got_ents;
9493 bfd_vma TOCstart;
9494 bfd_boolean ret = TRUE;
9495 bfd_boolean is_opd;
9496 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9497 bfd_boolean is_power4 = FALSE;
9498
9499 if (info->relocatable)
9500 return TRUE;
9501
9502 /* Initialize howto table if needed. */
9503 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9504 ppc_howto_init ();
9505
9506 htab = ppc_hash_table (info);
9507
9508 /* Don't relocate stub sections. */
9509 if (input_section->owner == htab->stub_bfd)
9510 return TRUE;
9511
9512 local_got_ents = elf_local_got_ents (input_bfd);
9513 TOCstart = elf_gp (output_bfd);
9514 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9515 sym_hashes = elf_sym_hashes (input_bfd);
9516 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9517
9518 rel = relocs;
9519 relend = relocs + input_section->reloc_count;
9520 for (; rel < relend; rel++)
9521 {
9522 enum elf_ppc64_reloc_type r_type;
9523 bfd_vma addend;
9524 bfd_reloc_status_type r;
9525 Elf_Internal_Sym *sym;
9526 asection *sec;
9527 struct elf_link_hash_entry *h_elf;
9528 struct ppc_link_hash_entry *h;
9529 struct ppc_link_hash_entry *fdh;
9530 const char *sym_name;
9531 unsigned long r_symndx, toc_symndx;
9532 char tls_mask, tls_gd, tls_type;
9533 char sym_type;
9534 bfd_vma relocation;
9535 bfd_boolean unresolved_reloc;
9536 bfd_boolean warned;
9537 unsigned long insn, mask;
9538 struct ppc_stub_hash_entry *stub_entry;
9539 bfd_vma max_br_offset;
9540 bfd_vma from;
9541
9542 r_type = ELF64_R_TYPE (rel->r_info);
9543 r_symndx = ELF64_R_SYM (rel->r_info);
9544
9545 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9546 symbol of the previous ADDR64 reloc. The symbol gives us the
9547 proper TOC base to use. */
9548 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9549 && rel != relocs
9550 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9551 && is_opd)
9552 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9553
9554 sym = NULL;
9555 sec = NULL;
9556 h_elf = NULL;
9557 sym_name = NULL;
9558 unresolved_reloc = FALSE;
9559 warned = FALSE;
9560
9561 if (r_symndx < symtab_hdr->sh_info)
9562 {
9563 /* It's a local symbol. */
9564 long *opd_adjust;
9565
9566 sym = local_syms + r_symndx;
9567 sec = local_sections[r_symndx];
9568 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9569 sym_type = ELF64_ST_TYPE (sym->st_info);
9570 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9571 opd_adjust = get_opd_info (sec);
9572 if (opd_adjust != NULL)
9573 {
9574 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9575 if (adjust == -1)
9576 relocation = 0;
9577 else
9578 relocation += adjust;
9579 }
9580 }
9581 else
9582 {
9583 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9584 r_symndx, symtab_hdr, sym_hashes,
9585 h_elf, sec, relocation,
9586 unresolved_reloc, warned);
9587 sym_name = h_elf->root.root.string;
9588 sym_type = h_elf->type;
9589 }
9590 h = (struct ppc_link_hash_entry *) h_elf;
9591
9592 /* TLS optimizations. Replace instruction sequences and relocs
9593 based on information we collected in tls_optimize. We edit
9594 RELOCS so that --emit-relocs will output something sensible
9595 for the final instruction stream. */
9596 tls_mask = 0;
9597 tls_gd = 0;
9598 toc_symndx = 0;
9599 if (IS_PPC64_TLS_RELOC (r_type))
9600 {
9601 if (h != NULL)
9602 tls_mask = h->tls_mask;
9603 else if (local_got_ents != NULL)
9604 {
9605 char *lgot_masks;
9606 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9607 tls_mask = lgot_masks[r_symndx];
9608 }
9609 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9610 {
9611 /* Check for toc tls entries. */
9612 char *toc_tls;
9613
9614 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9615 rel, input_bfd))
9616 return FALSE;
9617
9618 if (toc_tls)
9619 tls_mask = *toc_tls;
9620 }
9621 }
9622
9623 /* Check that tls relocs are used with tls syms, and non-tls
9624 relocs are used with non-tls syms. */
9625 if (r_symndx != 0
9626 && r_type != R_PPC64_NONE
9627 && (h == NULL
9628 || h->elf.root.type == bfd_link_hash_defined
9629 || h->elf.root.type == bfd_link_hash_defweak)
9630 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9631 {
9632 if (r_type == R_PPC64_TLS && tls_mask != 0)
9633 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9634 ;
9635 else
9636 (*_bfd_error_handler)
9637 (sym_type == STT_TLS
9638 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9639 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9640 input_bfd,
9641 input_section,
9642 (long) rel->r_offset,
9643 ppc64_elf_howto_table[r_type]->name,
9644 sym_name);
9645 }
9646
9647 /* Ensure reloc mapping code below stays sane. */
9648 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9649 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9650 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9651 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9652 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9653 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9654 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9655 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9656 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9657 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9658 abort ();
9659
9660 switch (r_type)
9661 {
9662 default:
9663 break;
9664
9665 case R_PPC64_TOC16:
9666 case R_PPC64_TOC16_LO:
9667 case R_PPC64_TOC16_DS:
9668 case R_PPC64_TOC16_LO_DS:
9669 {
9670 /* Check for toc tls entries. */
9671 char *toc_tls;
9672 int retval;
9673
9674 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9675 rel, input_bfd);
9676 if (retval == 0)
9677 return FALSE;
9678
9679 if (toc_tls)
9680 {
9681 tls_mask = *toc_tls;
9682 if (r_type == R_PPC64_TOC16_DS
9683 || r_type == R_PPC64_TOC16_LO_DS)
9684 {
9685 if (tls_mask != 0
9686 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9687 goto toctprel;
9688 }
9689 else
9690 {
9691 /* If we found a GD reloc pair, then we might be
9692 doing a GD->IE transition. */
9693 if (retval == 2)
9694 {
9695 tls_gd = TLS_TPRELGD;
9696 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9697 goto tls_get_addr_check;
9698 }
9699 else if (retval == 3)
9700 {
9701 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9702 goto tls_get_addr_check;
9703 }
9704 }
9705 }
9706 }
9707 break;
9708
9709 case R_PPC64_GOT_TPREL16_DS:
9710 case R_PPC64_GOT_TPREL16_LO_DS:
9711 if (tls_mask != 0
9712 && (tls_mask & TLS_TPREL) == 0)
9713 {
9714 toctprel:
9715 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9716 insn &= 31 << 21;
9717 insn |= 0x3c0d0000; /* addis 0,13,0 */
9718 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9719 r_type = R_PPC64_TPREL16_HA;
9720 if (toc_symndx != 0)
9721 {
9722 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9723 /* We changed the symbol. Start over in order to
9724 get h, sym, sec etc. right. */
9725 rel--;
9726 continue;
9727 }
9728 else
9729 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9730 }
9731 break;
9732
9733 case R_PPC64_TLS:
9734 if (tls_mask != 0
9735 && (tls_mask & TLS_TPREL) == 0)
9736 {
9737 bfd_vma rtra;
9738 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9739 if ((insn & ((0x3f << 26) | (31 << 11)))
9740 == ((31 << 26) | (13 << 11)))
9741 rtra = insn & ((1 << 26) - (1 << 16));
9742 else if ((insn & ((0x3f << 26) | (31 << 16)))
9743 == ((31 << 26) | (13 << 16)))
9744 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9745 else
9746 abort ();
9747 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9748 /* add -> addi. */
9749 insn = 14 << 26;
9750 else if ((insn & (31 << 1)) == 23 << 1
9751 && ((insn & (31 << 6)) < 14 << 6
9752 || ((insn & (31 << 6)) >= 16 << 6
9753 && (insn & (31 << 6)) < 24 << 6)))
9754 /* load and store indexed -> dform. */
9755 insn = (32 | ((insn >> 6) & 31)) << 26;
9756 else if ((insn & (31 << 1)) == 21 << 1
9757 && (insn & (0x1a << 6)) == 0)
9758 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9759 insn = (((58 | ((insn >> 6) & 4)) << 26)
9760 | ((insn >> 6) & 1));
9761 else if ((insn & (31 << 1)) == 21 << 1
9762 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9763 /* lwax -> lwa. */
9764 insn = (58 << 26) | 2;
9765 else
9766 abort ();
9767 insn |= rtra;
9768 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9769 /* Was PPC64_TLS which sits on insn boundary, now
9770 PPC64_TPREL16_LO which is at insn+2. */
9771 rel->r_offset += 2;
9772 r_type = R_PPC64_TPREL16_LO;
9773 if (toc_symndx != 0)
9774 {
9775 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9776 /* We changed the symbol. Start over in order to
9777 get h, sym, sec etc. right. */
9778 rel--;
9779 continue;
9780 }
9781 else
9782 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9783 }
9784 break;
9785
9786 case R_PPC64_GOT_TLSGD16_HI:
9787 case R_PPC64_GOT_TLSGD16_HA:
9788 tls_gd = TLS_TPRELGD;
9789 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9790 goto tls_gdld_hi;
9791 break;
9792
9793 case R_PPC64_GOT_TLSLD16_HI:
9794 case R_PPC64_GOT_TLSLD16_HA:
9795 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9796 {
9797 tls_gdld_hi:
9798 if ((tls_mask & tls_gd) != 0)
9799 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9800 + R_PPC64_GOT_TPREL16_DS);
9801 else
9802 {
9803 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9804 rel->r_offset -= 2;
9805 r_type = R_PPC64_NONE;
9806 }
9807 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9808 }
9809 break;
9810
9811 case R_PPC64_GOT_TLSGD16:
9812 case R_PPC64_GOT_TLSGD16_LO:
9813 tls_gd = TLS_TPRELGD;
9814 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9815 goto tls_get_addr_check;
9816 break;
9817
9818 case R_PPC64_GOT_TLSLD16:
9819 case R_PPC64_GOT_TLSLD16_LO:
9820 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9821 {
9822 tls_get_addr_check:
9823 if (rel + 1 < relend)
9824 {
9825 enum elf_ppc64_reloc_type r_type2;
9826 unsigned long r_symndx2;
9827 struct elf_link_hash_entry *h2;
9828 bfd_vma insn1, insn2, insn3;
9829 bfd_vma offset;
9830
9831 /* The next instruction should be a call to
9832 __tls_get_addr. Peek at the reloc to be sure. */
9833 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9834 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9835 if (r_symndx2 < symtab_hdr->sh_info
9836 || (r_type2 != R_PPC64_REL14
9837 && r_type2 != R_PPC64_REL14_BRTAKEN
9838 && r_type2 != R_PPC64_REL14_BRNTAKEN
9839 && r_type2 != R_PPC64_REL24))
9840 break;
9841
9842 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9843 while (h2->root.type == bfd_link_hash_indirect
9844 || h2->root.type == bfd_link_hash_warning)
9845 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9846 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9847 && h2 != &htab->tls_get_addr_fd->elf))
9848 break;
9849
9850 /* OK, it checks out. Replace the call. */
9851 offset = rel[1].r_offset;
9852 insn1 = bfd_get_32 (output_bfd,
9853 contents + rel->r_offset - 2);
9854 insn3 = bfd_get_32 (output_bfd,
9855 contents + offset + 4);
9856 if ((tls_mask & tls_gd) != 0)
9857 {
9858 /* IE */
9859 insn1 &= (1 << 26) - (1 << 2);
9860 insn1 |= 58 << 26; /* ld */
9861 insn2 = 0x7c636a14; /* add 3,3,13 */
9862 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9863 if ((tls_mask & TLS_EXPLICIT) == 0)
9864 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9865 + R_PPC64_GOT_TPREL16_DS);
9866 else
9867 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9868 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9869 }
9870 else
9871 {
9872 /* LE */
9873 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9874 insn2 = 0x38630000; /* addi 3,3,0 */
9875 if (tls_gd == 0)
9876 {
9877 /* Was an LD reloc. */
9878 r_symndx = 0;
9879 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9880 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9881 }
9882 else if (toc_symndx != 0)
9883 r_symndx = toc_symndx;
9884 r_type = R_PPC64_TPREL16_HA;
9885 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9886 rel[1].r_info = ELF64_R_INFO (r_symndx,
9887 R_PPC64_TPREL16_LO);
9888 rel[1].r_offset += 2;
9889 }
9890 if (insn3 == NOP
9891 || insn3 == CROR_151515 || insn3 == CROR_313131)
9892 {
9893 insn3 = insn2;
9894 insn2 = NOP;
9895 rel[1].r_offset += 4;
9896 }
9897 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9898 bfd_put_32 (output_bfd, insn2, contents + offset);
9899 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9900 if (tls_gd == 0 || toc_symndx != 0)
9901 {
9902 /* We changed the symbol. Start over in order
9903 to get h, sym, sec etc. right. */
9904 rel--;
9905 continue;
9906 }
9907 }
9908 }
9909 break;
9910
9911 case R_PPC64_DTPMOD64:
9912 if (rel + 1 < relend
9913 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9914 && rel[1].r_offset == rel->r_offset + 8)
9915 {
9916 if ((tls_mask & TLS_GD) == 0)
9917 {
9918 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9919 if ((tls_mask & TLS_TPRELGD) != 0)
9920 r_type = R_PPC64_TPREL64;
9921 else
9922 {
9923 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9924 r_type = R_PPC64_NONE;
9925 }
9926 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9927 }
9928 }
9929 else
9930 {
9931 if ((tls_mask & TLS_LD) == 0)
9932 {
9933 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9934 r_type = R_PPC64_NONE;
9935 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9936 }
9937 }
9938 break;
9939
9940 case R_PPC64_TPREL64:
9941 if ((tls_mask & TLS_TPREL) == 0)
9942 {
9943 r_type = R_PPC64_NONE;
9944 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9945 }
9946 break;
9947 }
9948
9949 /* Handle other relocations that tweak non-addend part of insn. */
9950 insn = 0;
9951 max_br_offset = 1 << 25;
9952 addend = rel->r_addend;
9953 switch (r_type)
9954 {
9955 default:
9956 break;
9957
9958 /* Branch taken prediction relocations. */
9959 case R_PPC64_ADDR14_BRTAKEN:
9960 case R_PPC64_REL14_BRTAKEN:
9961 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9962 /* Fall thru. */
9963
9964 /* Branch not taken prediction relocations. */
9965 case R_PPC64_ADDR14_BRNTAKEN:
9966 case R_PPC64_REL14_BRNTAKEN:
9967 insn |= bfd_get_32 (output_bfd,
9968 contents + rel->r_offset) & ~(0x01 << 21);
9969 /* Fall thru. */
9970
9971 case R_PPC64_REL14:
9972 max_br_offset = 1 << 15;
9973 /* Fall thru. */
9974
9975 case R_PPC64_REL24:
9976 /* Calls to functions with a different TOC, such as calls to
9977 shared objects, need to alter the TOC pointer. This is
9978 done using a linkage stub. A REL24 branching to these
9979 linkage stubs needs to be followed by a nop, as the nop
9980 will be replaced with an instruction to restore the TOC
9981 base pointer. */
9982 stub_entry = NULL;
9983 fdh = h;
9984 if (((h != NULL
9985 && (((fdh = h->oh) != NULL
9986 && fdh->elf.plt.plist != NULL)
9987 || (fdh = h)->elf.plt.plist != NULL))
9988 || (sec != NULL
9989 && sec->output_section != NULL
9990 && sec->id <= htab->top_id
9991 && (htab->stub_group[sec->id].toc_off
9992 != htab->stub_group[input_section->id].toc_off)))
9993 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9994 rel, htab)) != NULL
9995 && (stub_entry->stub_type == ppc_stub_plt_call
9996 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9997 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9998 {
9999 bfd_boolean can_plt_call = FALSE;
10000
10001 if (rel->r_offset + 8 <= input_section->size)
10002 {
10003 unsigned long nop;
10004 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10005 if (nop == NOP
10006 || nop == CROR_151515 || nop == CROR_313131)
10007 {
10008 bfd_put_32 (input_bfd, LD_R2_40R1,
10009 contents + rel->r_offset + 4);
10010 can_plt_call = TRUE;
10011 }
10012 }
10013
10014 if (!can_plt_call)
10015 {
10016 if (stub_entry->stub_type == ppc_stub_plt_call)
10017 {
10018 /* If this is a plain branch rather than a branch
10019 and link, don't require a nop. */
10020 unsigned long br;
10021 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10022 if ((br & 1) == 0)
10023 can_plt_call = TRUE;
10024 else
10025 stub_entry = NULL;
10026 }
10027 else if (h != NULL
10028 && strcmp (h->elf.root.root.string,
10029 ".__libc_start_main") == 0)
10030 {
10031 /* Allow crt1 branch to go via a toc adjusting stub. */
10032 can_plt_call = TRUE;
10033 }
10034 else
10035 {
10036 if (strcmp (input_section->output_section->name,
10037 ".init") == 0
10038 || strcmp (input_section->output_section->name,
10039 ".fini") == 0)
10040 (*_bfd_error_handler)
10041 (_("%B(%A+0x%lx): automatic multiple TOCs "
10042 "not supported using your crt files; "
10043 "recompile with -mminimal-toc or upgrade gcc"),
10044 input_bfd,
10045 input_section,
10046 (long) rel->r_offset);
10047 else
10048 (*_bfd_error_handler)
10049 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10050 "does not allow automatic multiple TOCs; "
10051 "recompile with -mminimal-toc or "
10052 "-fno-optimize-sibling-calls, "
10053 "or make `%s' extern"),
10054 input_bfd,
10055 input_section,
10056 (long) rel->r_offset,
10057 sym_name,
10058 sym_name);
10059 bfd_set_error (bfd_error_bad_value);
10060 ret = FALSE;
10061 }
10062 }
10063
10064 if (can_plt_call
10065 && stub_entry->stub_type == ppc_stub_plt_call)
10066 unresolved_reloc = FALSE;
10067 }
10068
10069 if (stub_entry == NULL
10070 && get_opd_info (sec) != NULL)
10071 {
10072 /* The branch destination is the value of the opd entry. */
10073 bfd_vma off = (relocation - sec->output_section->vma
10074 - sec->output_offset + rel->r_addend);
10075 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10076 if (dest != (bfd_vma) -1)
10077 {
10078 relocation = dest;
10079 addend = 0;
10080 }
10081 }
10082
10083 /* If the branch is out of reach we ought to have a long
10084 branch stub. */
10085 from = (rel->r_offset
10086 + input_section->output_offset
10087 + input_section->output_section->vma);
10088
10089 if (stub_entry == NULL
10090 && (relocation + rel->r_addend - from + max_br_offset
10091 >= 2 * max_br_offset)
10092 && r_type != R_PPC64_ADDR14_BRTAKEN
10093 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10094 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10095 htab);
10096
10097 if (stub_entry != NULL)
10098 {
10099 /* Munge up the value and addend so that we call the stub
10100 rather than the procedure directly. */
10101 relocation = (stub_entry->stub_offset
10102 + stub_entry->stub_sec->output_offset
10103 + stub_entry->stub_sec->output_section->vma);
10104 addend = 0;
10105 }
10106
10107 if (insn != 0)
10108 {
10109 if (is_power4)
10110 {
10111 /* Set 'a' bit. This is 0b00010 in BO field for branch
10112 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10113 for branch on CTR insns (BO == 1a00t or 1a01t). */
10114 if ((insn & (0x14 << 21)) == (0x04 << 21))
10115 insn |= 0x02 << 21;
10116 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10117 insn |= 0x08 << 21;
10118 else
10119 break;
10120 }
10121 else
10122 {
10123 /* Invert 'y' bit if not the default. */
10124 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
10125 insn ^= 0x01 << 21;
10126 }
10127
10128 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10129 }
10130
10131 /* NOP out calls to undefined weak functions.
10132 We can thus call a weak function without first
10133 checking whether the function is defined. */
10134 else if (h != NULL
10135 && h->elf.root.type == bfd_link_hash_undefweak
10136 && r_type == R_PPC64_REL24
10137 && relocation == 0
10138 && rel->r_addend == 0)
10139 {
10140 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10141 continue;
10142 }
10143 break;
10144 }
10145
10146 /* Set `addend'. */
10147 tls_type = 0;
10148 switch (r_type)
10149 {
10150 default:
10151 (*_bfd_error_handler)
10152 (_("%B: unknown relocation type %d for symbol %s"),
10153 input_bfd, (int) r_type, sym_name);
10154
10155 bfd_set_error (bfd_error_bad_value);
10156 ret = FALSE;
10157 continue;
10158
10159 case R_PPC64_NONE:
10160 case R_PPC64_TLS:
10161 case R_PPC64_GNU_VTINHERIT:
10162 case R_PPC64_GNU_VTENTRY:
10163 continue;
10164
10165 /* GOT16 relocations. Like an ADDR16 using the symbol's
10166 address in the GOT as relocation value instead of the
10167 symbol's value itself. Also, create a GOT entry for the
10168 symbol and put the symbol value there. */
10169 case R_PPC64_GOT_TLSGD16:
10170 case R_PPC64_GOT_TLSGD16_LO:
10171 case R_PPC64_GOT_TLSGD16_HI:
10172 case R_PPC64_GOT_TLSGD16_HA:
10173 tls_type = TLS_TLS | TLS_GD;
10174 goto dogot;
10175
10176 case R_PPC64_GOT_TLSLD16:
10177 case R_PPC64_GOT_TLSLD16_LO:
10178 case R_PPC64_GOT_TLSLD16_HI:
10179 case R_PPC64_GOT_TLSLD16_HA:
10180 tls_type = TLS_TLS | TLS_LD;
10181 goto dogot;
10182
10183 case R_PPC64_GOT_TPREL16_DS:
10184 case R_PPC64_GOT_TPREL16_LO_DS:
10185 case R_PPC64_GOT_TPREL16_HI:
10186 case R_PPC64_GOT_TPREL16_HA:
10187 tls_type = TLS_TLS | TLS_TPREL;
10188 goto dogot;
10189
10190 case R_PPC64_GOT_DTPREL16_DS:
10191 case R_PPC64_GOT_DTPREL16_LO_DS:
10192 case R_PPC64_GOT_DTPREL16_HI:
10193 case R_PPC64_GOT_DTPREL16_HA:
10194 tls_type = TLS_TLS | TLS_DTPREL;
10195 goto dogot;
10196
10197 case R_PPC64_GOT16:
10198 case R_PPC64_GOT16_LO:
10199 case R_PPC64_GOT16_HI:
10200 case R_PPC64_GOT16_HA:
10201 case R_PPC64_GOT16_DS:
10202 case R_PPC64_GOT16_LO_DS:
10203 dogot:
10204 {
10205 /* Relocation is to the entry for this symbol in the global
10206 offset table. */
10207 asection *got;
10208 bfd_vma *offp;
10209 bfd_vma off;
10210 unsigned long indx = 0;
10211
10212 if (tls_type == (TLS_TLS | TLS_LD)
10213 && (h == NULL
10214 || !h->elf.def_dynamic))
10215 offp = &ppc64_tlsld_got (input_bfd)->offset;
10216 else
10217 {
10218 struct got_entry *ent;
10219
10220 if (h != NULL)
10221 {
10222 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10223 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10224 &h->elf)
10225 || (info->shared
10226 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10227 /* This is actually a static link, or it is a
10228 -Bsymbolic link and the symbol is defined
10229 locally, or the symbol was forced to be local
10230 because of a version file. */
10231 ;
10232 else
10233 {
10234 indx = h->elf.dynindx;
10235 unresolved_reloc = FALSE;
10236 }
10237 ent = h->elf.got.glist;
10238 }
10239 else
10240 {
10241 if (local_got_ents == NULL)
10242 abort ();
10243 ent = local_got_ents[r_symndx];
10244 }
10245
10246 for (; ent != NULL; ent = ent->next)
10247 if (ent->addend == rel->r_addend
10248 && ent->owner == input_bfd
10249 && ent->tls_type == tls_type)
10250 break;
10251 if (ent == NULL)
10252 abort ();
10253 offp = &ent->got.offset;
10254 }
10255
10256 got = ppc64_elf_tdata (input_bfd)->got;
10257 if (got == NULL)
10258 abort ();
10259
10260 /* The offset must always be a multiple of 8. We use the
10261 least significant bit to record whether we have already
10262 processed this entry. */
10263 off = *offp;
10264 if ((off & 1) != 0)
10265 off &= ~1;
10266 else
10267 {
10268 /* Generate relocs for the dynamic linker, except in
10269 the case of TLSLD where we'll use one entry per
10270 module. */
10271 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10272
10273 *offp = off | 1;
10274 if ((info->shared || indx != 0)
10275 && (h == NULL
10276 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10277 || h->elf.root.type != bfd_link_hash_undefweak))
10278 {
10279 outrel.r_offset = (got->output_section->vma
10280 + got->output_offset
10281 + off);
10282 outrel.r_addend = rel->r_addend;
10283 if (tls_type & (TLS_LD | TLS_GD))
10284 {
10285 outrel.r_addend = 0;
10286 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10287 if (tls_type == (TLS_TLS | TLS_GD))
10288 {
10289 loc = relgot->contents;
10290 loc += (relgot->reloc_count++
10291 * sizeof (Elf64_External_Rela));
10292 bfd_elf64_swap_reloca_out (output_bfd,
10293 &outrel, loc);
10294 outrel.r_offset += 8;
10295 outrel.r_addend = rel->r_addend;
10296 outrel.r_info
10297 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10298 }
10299 }
10300 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10301 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10302 else if (tls_type == (TLS_TLS | TLS_TPREL))
10303 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10304 else if (indx == 0)
10305 {
10306 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10307
10308 /* Write the .got section contents for the sake
10309 of prelink. */
10310 loc = got->contents + off;
10311 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10312 loc);
10313 }
10314 else
10315 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10316
10317 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10318 {
10319 outrel.r_addend += relocation;
10320 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10321 outrel.r_addend -= htab->elf.tls_sec->vma;
10322 }
10323 loc = relgot->contents;
10324 loc += (relgot->reloc_count++
10325 * sizeof (Elf64_External_Rela));
10326 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10327 }
10328
10329 /* Init the .got section contents here if we're not
10330 emitting a reloc. */
10331 else
10332 {
10333 relocation += rel->r_addend;
10334 if (tls_type == (TLS_TLS | TLS_LD))
10335 relocation = 1;
10336 else if (tls_type != 0)
10337 {
10338 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10339 if (tls_type == (TLS_TLS | TLS_TPREL))
10340 relocation += DTP_OFFSET - TP_OFFSET;
10341
10342 if (tls_type == (TLS_TLS | TLS_GD))
10343 {
10344 bfd_put_64 (output_bfd, relocation,
10345 got->contents + off + 8);
10346 relocation = 1;
10347 }
10348 }
10349
10350 bfd_put_64 (output_bfd, relocation,
10351 got->contents + off);
10352 }
10353 }
10354
10355 if (off >= (bfd_vma) -2)
10356 abort ();
10357
10358 relocation = got->output_offset + off;
10359
10360 /* TOC base (r2) is TOC start plus 0x8000. */
10361 addend = -TOC_BASE_OFF;
10362 }
10363 break;
10364
10365 case R_PPC64_PLT16_HA:
10366 case R_PPC64_PLT16_HI:
10367 case R_PPC64_PLT16_LO:
10368 case R_PPC64_PLT32:
10369 case R_PPC64_PLT64:
10370 /* Relocation is to the entry for this symbol in the
10371 procedure linkage table. */
10372
10373 /* Resolve a PLT reloc against a local symbol directly,
10374 without using the procedure linkage table. */
10375 if (h == NULL)
10376 break;
10377
10378 /* It's possible that we didn't make a PLT entry for this
10379 symbol. This happens when statically linking PIC code,
10380 or when using -Bsymbolic. Go find a match if there is a
10381 PLT entry. */
10382 if (htab->plt != NULL)
10383 {
10384 struct plt_entry *ent;
10385 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10386 if (ent->addend == rel->r_addend
10387 && ent->plt.offset != (bfd_vma) -1)
10388 {
10389 relocation = (htab->plt->output_section->vma
10390 + htab->plt->output_offset
10391 + ent->plt.offset);
10392 unresolved_reloc = FALSE;
10393 }
10394 }
10395 break;
10396
10397 case R_PPC64_TOC:
10398 /* Relocation value is TOC base. */
10399 relocation = TOCstart;
10400 if (r_symndx == 0)
10401 relocation += htab->stub_group[input_section->id].toc_off;
10402 else if (unresolved_reloc)
10403 ;
10404 else if (sec != NULL && sec->id <= htab->top_id)
10405 relocation += htab->stub_group[sec->id].toc_off;
10406 else
10407 unresolved_reloc = TRUE;
10408 goto dodyn2;
10409
10410 /* TOC16 relocs. We want the offset relative to the TOC base,
10411 which is the address of the start of the TOC plus 0x8000.
10412 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10413 in this order. */
10414 case R_PPC64_TOC16:
10415 case R_PPC64_TOC16_LO:
10416 case R_PPC64_TOC16_HI:
10417 case R_PPC64_TOC16_DS:
10418 case R_PPC64_TOC16_LO_DS:
10419 case R_PPC64_TOC16_HA:
10420 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10421 break;
10422
10423 /* Relocate against the beginning of the section. */
10424 case R_PPC64_SECTOFF:
10425 case R_PPC64_SECTOFF_LO:
10426 case R_PPC64_SECTOFF_HI:
10427 case R_PPC64_SECTOFF_DS:
10428 case R_PPC64_SECTOFF_LO_DS:
10429 case R_PPC64_SECTOFF_HA:
10430 if (sec != NULL)
10431 addend -= sec->output_section->vma;
10432 break;
10433
10434 case R_PPC64_REL14:
10435 case R_PPC64_REL14_BRNTAKEN:
10436 case R_PPC64_REL14_BRTAKEN:
10437 case R_PPC64_REL24:
10438 break;
10439
10440 case R_PPC64_TPREL16:
10441 case R_PPC64_TPREL16_LO:
10442 case R_PPC64_TPREL16_HI:
10443 case R_PPC64_TPREL16_HA:
10444 case R_PPC64_TPREL16_DS:
10445 case R_PPC64_TPREL16_LO_DS:
10446 case R_PPC64_TPREL16_HIGHER:
10447 case R_PPC64_TPREL16_HIGHERA:
10448 case R_PPC64_TPREL16_HIGHEST:
10449 case R_PPC64_TPREL16_HIGHESTA:
10450 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10451 if (info->shared)
10452 /* The TPREL16 relocs shouldn't really be used in shared
10453 libs as they will result in DT_TEXTREL being set, but
10454 support them anyway. */
10455 goto dodyn;
10456 break;
10457
10458 case R_PPC64_DTPREL16:
10459 case R_PPC64_DTPREL16_LO:
10460 case R_PPC64_DTPREL16_HI:
10461 case R_PPC64_DTPREL16_HA:
10462 case R_PPC64_DTPREL16_DS:
10463 case R_PPC64_DTPREL16_LO_DS:
10464 case R_PPC64_DTPREL16_HIGHER:
10465 case R_PPC64_DTPREL16_HIGHERA:
10466 case R_PPC64_DTPREL16_HIGHEST:
10467 case R_PPC64_DTPREL16_HIGHESTA:
10468 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10469 break;
10470
10471 case R_PPC64_DTPMOD64:
10472 relocation = 1;
10473 addend = 0;
10474 goto dodyn;
10475
10476 case R_PPC64_TPREL64:
10477 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10478 goto dodyn;
10479
10480 case R_PPC64_DTPREL64:
10481 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10482 /* Fall thru */
10483
10484 /* Relocations that may need to be propagated if this is a
10485 dynamic object. */
10486 case R_PPC64_REL30:
10487 case R_PPC64_REL32:
10488 case R_PPC64_REL64:
10489 case R_PPC64_ADDR14:
10490 case R_PPC64_ADDR14_BRNTAKEN:
10491 case R_PPC64_ADDR14_BRTAKEN:
10492 case R_PPC64_ADDR16:
10493 case R_PPC64_ADDR16_DS:
10494 case R_PPC64_ADDR16_HA:
10495 case R_PPC64_ADDR16_HI:
10496 case R_PPC64_ADDR16_HIGHER:
10497 case R_PPC64_ADDR16_HIGHERA:
10498 case R_PPC64_ADDR16_HIGHEST:
10499 case R_PPC64_ADDR16_HIGHESTA:
10500 case R_PPC64_ADDR16_LO:
10501 case R_PPC64_ADDR16_LO_DS:
10502 case R_PPC64_ADDR24:
10503 case R_PPC64_ADDR32:
10504 case R_PPC64_ADDR64:
10505 case R_PPC64_UADDR16:
10506 case R_PPC64_UADDR32:
10507 case R_PPC64_UADDR64:
10508 /* r_symndx will be zero only for relocs against symbols
10509 from removed linkonce sections, or sections discarded by
10510 a linker script. */
10511 dodyn:
10512 if (r_symndx == 0)
10513 break;
10514 /* Fall thru. */
10515
10516 dodyn2:
10517 if ((input_section->flags & SEC_ALLOC) == 0)
10518 break;
10519
10520 if (NO_OPD_RELOCS && is_opd)
10521 break;
10522
10523 if ((info->shared
10524 && (h == NULL
10525 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10526 || h->elf.root.type != bfd_link_hash_undefweak)
10527 && (MUST_BE_DYN_RELOC (r_type)
10528 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10529 || (ELIMINATE_COPY_RELOCS
10530 && !info->shared
10531 && h != NULL
10532 && h->elf.dynindx != -1
10533 && !h->elf.non_got_ref
10534 && h->elf.def_dynamic
10535 && !h->elf.def_regular))
10536 {
10537 Elf_Internal_Rela outrel;
10538 bfd_boolean skip, relocate;
10539 asection *sreloc;
10540 bfd_byte *loc;
10541 bfd_vma out_off;
10542
10543 /* When generating a dynamic object, these relocations
10544 are copied into the output file to be resolved at run
10545 time. */
10546
10547 skip = FALSE;
10548 relocate = FALSE;
10549
10550 out_off = _bfd_elf_section_offset (output_bfd, info,
10551 input_section, rel->r_offset);
10552 if (out_off == (bfd_vma) -1)
10553 skip = TRUE;
10554 else if (out_off == (bfd_vma) -2)
10555 skip = TRUE, relocate = TRUE;
10556 out_off += (input_section->output_section->vma
10557 + input_section->output_offset);
10558 outrel.r_offset = out_off;
10559 outrel.r_addend = rel->r_addend;
10560
10561 /* Optimize unaligned reloc use. */
10562 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10563 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10564 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10565 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10566 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10567 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10568 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10569 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10570 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10571
10572 if (skip)
10573 memset (&outrel, 0, sizeof outrel);
10574 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10575 && !is_opd
10576 && r_type != R_PPC64_TOC)
10577 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10578 else
10579 {
10580 /* This symbol is local, or marked to become local,
10581 or this is an opd section reloc which must point
10582 at a local function. */
10583 outrel.r_addend += relocation;
10584 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10585 {
10586 if (is_opd && h != NULL)
10587 {
10588 /* Lie about opd entries. This case occurs
10589 when building shared libraries and we
10590 reference a function in another shared
10591 lib. The same thing happens for a weak
10592 definition in an application that's
10593 overridden by a strong definition in a
10594 shared lib. (I believe this is a generic
10595 bug in binutils handling of weak syms.)
10596 In these cases we won't use the opd
10597 entry in this lib. */
10598 unresolved_reloc = FALSE;
10599 }
10600 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10601
10602 /* We need to relocate .opd contents for ld.so.
10603 Prelink also wants simple and consistent rules
10604 for relocs. This make all RELATIVE relocs have
10605 *r_offset equal to r_addend. */
10606 relocate = TRUE;
10607 }
10608 else
10609 {
10610 long indx = 0;
10611
10612 if (bfd_is_abs_section (sec))
10613 ;
10614 else if (sec == NULL || sec->owner == NULL)
10615 {
10616 bfd_set_error (bfd_error_bad_value);
10617 return FALSE;
10618 }
10619 else
10620 {
10621 asection *osec;
10622
10623 osec = sec->output_section;
10624 indx = elf_section_data (osec)->dynindx;
10625
10626 /* We are turning this relocation into one
10627 against a section symbol, so subtract out
10628 the output section's address but not the
10629 offset of the input section in the output
10630 section. */
10631 outrel.r_addend -= osec->vma;
10632 }
10633
10634 outrel.r_info = ELF64_R_INFO (indx, r_type);
10635 }
10636 }
10637
10638 sreloc = elf_section_data (input_section)->sreloc;
10639 if (sreloc == NULL)
10640 abort ();
10641
10642 loc = sreloc->contents;
10643 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10644 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10645
10646 /* If this reloc is against an external symbol, it will
10647 be computed at runtime, so there's no need to do
10648 anything now. However, for the sake of prelink ensure
10649 that the section contents are a known value. */
10650 if (! relocate)
10651 {
10652 unresolved_reloc = FALSE;
10653 /* The value chosen here is quite arbitrary as ld.so
10654 ignores section contents except for the special
10655 case of .opd where the contents might be accessed
10656 before relocation. Choose zero, as that won't
10657 cause reloc overflow. */
10658 relocation = 0;
10659 addend = 0;
10660 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10661 to improve backward compatibility with older
10662 versions of ld. */
10663 if (r_type == R_PPC64_ADDR64)
10664 addend = outrel.r_addend;
10665 /* Adjust pc_relative relocs to have zero in *r_offset. */
10666 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10667 addend = (input_section->output_section->vma
10668 + input_section->output_offset
10669 + rel->r_offset);
10670 }
10671 }
10672 break;
10673
10674 case R_PPC64_COPY:
10675 case R_PPC64_GLOB_DAT:
10676 case R_PPC64_JMP_SLOT:
10677 case R_PPC64_RELATIVE:
10678 /* We shouldn't ever see these dynamic relocs in relocatable
10679 files. */
10680 /* Fall through. */
10681
10682 case R_PPC64_PLTGOT16:
10683 case R_PPC64_PLTGOT16_DS:
10684 case R_PPC64_PLTGOT16_HA:
10685 case R_PPC64_PLTGOT16_HI:
10686 case R_PPC64_PLTGOT16_LO:
10687 case R_PPC64_PLTGOT16_LO_DS:
10688 case R_PPC64_PLTREL32:
10689 case R_PPC64_PLTREL64:
10690 /* These ones haven't been implemented yet. */
10691
10692 (*_bfd_error_handler)
10693 (_("%B: relocation %s is not supported for symbol %s."),
10694 input_bfd,
10695 ppc64_elf_howto_table[r_type]->name, sym_name);
10696
10697 bfd_set_error (bfd_error_invalid_operation);
10698 ret = FALSE;
10699 continue;
10700 }
10701
10702 /* Do any further special processing. */
10703 switch (r_type)
10704 {
10705 default:
10706 break;
10707
10708 case R_PPC64_ADDR16_HA:
10709 case R_PPC64_ADDR16_HIGHERA:
10710 case R_PPC64_ADDR16_HIGHESTA:
10711 case R_PPC64_GOT16_HA:
10712 case R_PPC64_PLTGOT16_HA:
10713 case R_PPC64_PLT16_HA:
10714 case R_PPC64_TOC16_HA:
10715 case R_PPC64_SECTOFF_HA:
10716 case R_PPC64_TPREL16_HA:
10717 case R_PPC64_DTPREL16_HA:
10718 case R_PPC64_GOT_TLSGD16_HA:
10719 case R_PPC64_GOT_TLSLD16_HA:
10720 case R_PPC64_GOT_TPREL16_HA:
10721 case R_PPC64_GOT_DTPREL16_HA:
10722 case R_PPC64_TPREL16_HIGHER:
10723 case R_PPC64_TPREL16_HIGHERA:
10724 case R_PPC64_TPREL16_HIGHEST:
10725 case R_PPC64_TPREL16_HIGHESTA:
10726 case R_PPC64_DTPREL16_HIGHER:
10727 case R_PPC64_DTPREL16_HIGHERA:
10728 case R_PPC64_DTPREL16_HIGHEST:
10729 case R_PPC64_DTPREL16_HIGHESTA:
10730 /* It's just possible that this symbol is a weak symbol
10731 that's not actually defined anywhere. In that case,
10732 'sec' would be NULL, and we should leave the symbol
10733 alone (it will be set to zero elsewhere in the link). */
10734 if (sec != NULL)
10735 /* Add 0x10000 if sign bit in 0:15 is set.
10736 Bits 0:15 are not used. */
10737 addend += 0x8000;
10738 break;
10739
10740 case R_PPC64_ADDR16_DS:
10741 case R_PPC64_ADDR16_LO_DS:
10742 case R_PPC64_GOT16_DS:
10743 case R_PPC64_GOT16_LO_DS:
10744 case R_PPC64_PLT16_LO_DS:
10745 case R_PPC64_SECTOFF_DS:
10746 case R_PPC64_SECTOFF_LO_DS:
10747 case R_PPC64_TOC16_DS:
10748 case R_PPC64_TOC16_LO_DS:
10749 case R_PPC64_PLTGOT16_DS:
10750 case R_PPC64_PLTGOT16_LO_DS:
10751 case R_PPC64_GOT_TPREL16_DS:
10752 case R_PPC64_GOT_TPREL16_LO_DS:
10753 case R_PPC64_GOT_DTPREL16_DS:
10754 case R_PPC64_GOT_DTPREL16_LO_DS:
10755 case R_PPC64_TPREL16_DS:
10756 case R_PPC64_TPREL16_LO_DS:
10757 case R_PPC64_DTPREL16_DS:
10758 case R_PPC64_DTPREL16_LO_DS:
10759 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10760 mask = 3;
10761 /* If this reloc is against an lq insn, then the value must be
10762 a multiple of 16. This is somewhat of a hack, but the
10763 "correct" way to do this by defining _DQ forms of all the
10764 _DS relocs bloats all reloc switches in this file. It
10765 doesn't seem to make much sense to use any of these relocs
10766 in data, so testing the insn should be safe. */
10767 if ((insn & (0x3f << 26)) == (56u << 26))
10768 mask = 15;
10769 if (((relocation + addend) & mask) != 0)
10770 {
10771 (*_bfd_error_handler)
10772 (_("%B: error: relocation %s not a multiple of %d"),
10773 input_bfd,
10774 ppc64_elf_howto_table[r_type]->name,
10775 mask + 1);
10776 bfd_set_error (bfd_error_bad_value);
10777 ret = FALSE;
10778 continue;
10779 }
10780 break;
10781 }
10782
10783 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10784 because such sections are not SEC_ALLOC and thus ld.so will
10785 not process them. */
10786 if (unresolved_reloc
10787 && !((input_section->flags & SEC_DEBUGGING) != 0
10788 && h->elf.def_dynamic))
10789 {
10790 (*_bfd_error_handler)
10791 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10792 input_bfd,
10793 input_section,
10794 (long) rel->r_offset,
10795 ppc64_elf_howto_table[(int) r_type]->name,
10796 h->elf.root.root.string);
10797 ret = FALSE;
10798 }
10799
10800 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10801 input_bfd,
10802 input_section,
10803 contents,
10804 rel->r_offset,
10805 relocation,
10806 addend);
10807
10808 if (r != bfd_reloc_ok)
10809 {
10810 if (sym_name == NULL)
10811 sym_name = "(null)";
10812 if (r == bfd_reloc_overflow)
10813 {
10814 if (warned)
10815 continue;
10816 if (h != NULL
10817 && h->elf.root.type == bfd_link_hash_undefweak
10818 && ppc64_elf_howto_table[r_type]->pc_relative)
10819 {
10820 /* Assume this is a call protected by other code that
10821 detects the symbol is undefined. If this is the case,
10822 we can safely ignore the overflow. If not, the
10823 program is hosed anyway, and a little warning isn't
10824 going to help. */
10825
10826 continue;
10827 }
10828
10829 if (!((*info->callbacks->reloc_overflow)
10830 (info, (h ? &h->elf.root : NULL), sym_name,
10831 ppc64_elf_howto_table[r_type]->name,
10832 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10833 return FALSE;
10834 }
10835 else
10836 {
10837 (*_bfd_error_handler)
10838 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10839 input_bfd,
10840 input_section,
10841 (long) rel->r_offset,
10842 ppc64_elf_howto_table[r_type]->name,
10843 sym_name,
10844 (int) r);
10845 ret = FALSE;
10846 }
10847 }
10848 }
10849
10850 /* If we're emitting relocations, then shortly after this function
10851 returns, reloc offsets and addends for this section will be
10852 adjusted. Worse, reloc symbol indices will be for the output
10853 file rather than the input. Save a copy of the relocs for
10854 opd_entry_value. */
10855 if (is_opd && info->emitrelocations)
10856 {
10857 bfd_size_type amt;
10858 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10859 rel = bfd_alloc (input_bfd, amt);
10860 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10861 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10862 if (rel == NULL)
10863 return FALSE;
10864 memcpy (rel, relocs, amt);
10865 }
10866 return ret;
10867 }
10868
10869 /* Adjust the value of any local symbols in opd sections. */
10870
10871 static bfd_boolean
10872 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10873 const char *name ATTRIBUTE_UNUSED,
10874 Elf_Internal_Sym *elfsym,
10875 asection *input_sec,
10876 struct elf_link_hash_entry *h)
10877 {
10878 long *opd_adjust, adjust;
10879 bfd_vma value;
10880
10881 if (h != NULL)
10882 return TRUE;
10883
10884 opd_adjust = get_opd_info (input_sec);
10885 if (opd_adjust == NULL)
10886 return TRUE;
10887
10888 value = elfsym->st_value - input_sec->output_offset;
10889 if (!info->relocatable)
10890 value -= input_sec->output_section->vma;
10891
10892 adjust = opd_adjust[value / 8];
10893 if (adjust == -1)
10894 elfsym->st_value = 0;
10895 else
10896 elfsym->st_value += adjust;
10897 return TRUE;
10898 }
10899
10900 /* Finish up dynamic symbol handling. We set the contents of various
10901 dynamic sections here. */
10902
10903 static bfd_boolean
10904 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10905 struct bfd_link_info *info,
10906 struct elf_link_hash_entry *h,
10907 Elf_Internal_Sym *sym)
10908 {
10909 struct ppc_link_hash_table *htab;
10910 bfd *dynobj;
10911 struct plt_entry *ent;
10912 Elf_Internal_Rela rela;
10913 bfd_byte *loc;
10914
10915 htab = ppc_hash_table (info);
10916 dynobj = htab->elf.dynobj;
10917
10918 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10919 if (ent->plt.offset != (bfd_vma) -1)
10920 {
10921 /* This symbol has an entry in the procedure linkage
10922 table. Set it up. */
10923
10924 if (htab->plt == NULL
10925 || htab->relplt == NULL
10926 || htab->glink == NULL)
10927 abort ();
10928
10929 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10930 fill in the PLT entry. */
10931 rela.r_offset = (htab->plt->output_section->vma
10932 + htab->plt->output_offset
10933 + ent->plt.offset);
10934 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10935 rela.r_addend = ent->addend;
10936
10937 loc = htab->relplt->contents;
10938 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10939 * sizeof (Elf64_External_Rela));
10940 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10941 }
10942
10943 if (h->needs_copy)
10944 {
10945 Elf_Internal_Rela rela;
10946 bfd_byte *loc;
10947
10948 /* This symbol needs a copy reloc. Set it up. */
10949
10950 if (h->dynindx == -1
10951 || (h->root.type != bfd_link_hash_defined
10952 && h->root.type != bfd_link_hash_defweak)
10953 || htab->relbss == NULL)
10954 abort ();
10955
10956 rela.r_offset = (h->root.u.def.value
10957 + h->root.u.def.section->output_section->vma
10958 + h->root.u.def.section->output_offset);
10959 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10960 rela.r_addend = 0;
10961 loc = htab->relbss->contents;
10962 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10963 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10964 }
10965
10966 /* Mark some specially defined symbols as absolute. */
10967 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10968 sym->st_shndx = SHN_ABS;
10969
10970 return TRUE;
10971 }
10972
10973 /* Used to decide how to sort relocs in an optimal manner for the
10974 dynamic linker, before writing them out. */
10975
10976 static enum elf_reloc_type_class
10977 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10978 {
10979 enum elf_ppc64_reloc_type r_type;
10980
10981 r_type = ELF64_R_TYPE (rela->r_info);
10982 switch (r_type)
10983 {
10984 case R_PPC64_RELATIVE:
10985 return reloc_class_relative;
10986 case R_PPC64_JMP_SLOT:
10987 return reloc_class_plt;
10988 case R_PPC64_COPY:
10989 return reloc_class_copy;
10990 default:
10991 return reloc_class_normal;
10992 }
10993 }
10994
10995 /* Finish up the dynamic sections. */
10996
10997 static bfd_boolean
10998 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10999 struct bfd_link_info *info)
11000 {
11001 struct ppc_link_hash_table *htab;
11002 bfd *dynobj;
11003 asection *sdyn;
11004
11005 htab = ppc_hash_table (info);
11006 dynobj = htab->elf.dynobj;
11007 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11008
11009 if (htab->elf.dynamic_sections_created)
11010 {
11011 Elf64_External_Dyn *dyncon, *dynconend;
11012
11013 if (sdyn == NULL || htab->got == NULL)
11014 abort ();
11015
11016 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11017 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11018 for (; dyncon < dynconend; dyncon++)
11019 {
11020 Elf_Internal_Dyn dyn;
11021 asection *s;
11022
11023 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11024
11025 switch (dyn.d_tag)
11026 {
11027 default:
11028 continue;
11029
11030 case DT_PPC64_GLINK:
11031 s = htab->glink;
11032 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11033 /* We stupidly defined DT_PPC64_GLINK to be the start
11034 of glink rather than the first entry point, which is
11035 what ld.so needs, and now have a bigger stub to
11036 support automatic multiple TOCs. */
11037 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11038 break;
11039
11040 case DT_PPC64_OPD:
11041 s = bfd_get_section_by_name (output_bfd, ".opd");
11042 if (s == NULL)
11043 continue;
11044 dyn.d_un.d_ptr = s->vma;
11045 break;
11046
11047 case DT_PPC64_OPDSZ:
11048 s = bfd_get_section_by_name (output_bfd, ".opd");
11049 if (s == NULL)
11050 continue;
11051 dyn.d_un.d_val = s->size;
11052 break;
11053
11054 case DT_PLTGOT:
11055 s = htab->plt;
11056 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11057 break;
11058
11059 case DT_JMPREL:
11060 s = htab->relplt;
11061 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11062 break;
11063
11064 case DT_PLTRELSZ:
11065 dyn.d_un.d_val = htab->relplt->size;
11066 break;
11067
11068 case DT_RELASZ:
11069 /* Don't count procedure linkage table relocs in the
11070 overall reloc count. */
11071 s = htab->relplt;
11072 if (s == NULL)
11073 continue;
11074 dyn.d_un.d_val -= s->size;
11075 break;
11076
11077 case DT_RELA:
11078 /* We may not be using the standard ELF linker script.
11079 If .rela.plt is the first .rela section, we adjust
11080 DT_RELA to not include it. */
11081 s = htab->relplt;
11082 if (s == NULL)
11083 continue;
11084 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11085 continue;
11086 dyn.d_un.d_ptr += s->size;
11087 break;
11088 }
11089
11090 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11091 }
11092 }
11093
11094 if (htab->got != NULL && htab->got->size != 0)
11095 {
11096 /* Fill in the first entry in the global offset table.
11097 We use it to hold the link-time TOCbase. */
11098 bfd_put_64 (output_bfd,
11099 elf_gp (output_bfd) + TOC_BASE_OFF,
11100 htab->got->contents);
11101
11102 /* Set .got entry size. */
11103 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11104 }
11105
11106 if (htab->plt != NULL && htab->plt->size != 0)
11107 {
11108 /* Set .plt entry size. */
11109 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11110 = PLT_ENTRY_SIZE;
11111 }
11112
11113 /* We need to handle writing out multiple GOT sections ourselves,
11114 since we didn't add them to DYNOBJ. We know dynobj is the first
11115 bfd. */
11116 while ((dynobj = dynobj->link_next) != NULL)
11117 {
11118 asection *s;
11119
11120 if (!is_ppc64_elf_target (dynobj->xvec))
11121 continue;
11122
11123 s = ppc64_elf_tdata (dynobj)->got;
11124 if (s != NULL
11125 && s->size != 0
11126 && s->output_section != bfd_abs_section_ptr
11127 && !bfd_set_section_contents (output_bfd, s->output_section,
11128 s->contents, s->output_offset,
11129 s->size))
11130 return FALSE;
11131 s = ppc64_elf_tdata (dynobj)->relgot;
11132 if (s != NULL
11133 && s->size != 0
11134 && s->output_section != bfd_abs_section_ptr
11135 && !bfd_set_section_contents (output_bfd, s->output_section,
11136 s->contents, s->output_offset,
11137 s->size))
11138 return FALSE;
11139 }
11140
11141 return TRUE;
11142 }
11143
11144 #include "elf64-target.h"
GDB Binutils - Deliverables
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