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* elf64-hppa.c (elf64_hppa_new_dyn_hash_entry): Don't clear everything,
[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 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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_symbol_offset 0
71 #define elf_backend_got_header_size 8
72 #define elf_backend_can_gc_sections 1
73 #define elf_backend_can_refcount 1
74 #define elf_backend_rela_normal 1
75
76 #define bfd_elf64_mkobject ppc64_elf_mkobject
77 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
78 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
79 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
80 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
81 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
82 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
83
84 #define elf_backend_object_p ppc64_elf_object_p
85 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
86 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
87 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
88 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
89 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
90 #define elf_backend_check_directives ppc64_elf_check_directives
91 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
92 #define elf_backend_check_relocs ppc64_elf_check_relocs
93 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
94 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
95 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
96 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
97 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
98 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
99 #define elf_backend_relocate_section ppc64_elf_relocate_section
100 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
101 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
102 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
103 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
104 #define elf_backend_special_sections ppc64_elf_special_sections
105
106 /* The name of the dynamic interpreter. This is put in the .interp
107 section. */
108 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
109
110 /* The size in bytes of an entry in the procedure linkage table. */
111 #define PLT_ENTRY_SIZE 24
112
113 /* The initial size of the plt reserved for the dynamic linker. */
114 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
115
116 /* TOC base pointers offset from start of TOC. */
117 #define TOC_BASE_OFF 0x8000
118
119 /* Offset of tp and dtp pointers from start of TLS block. */
120 #define TP_OFFSET 0x7000
121 #define DTP_OFFSET 0x8000
122
123 /* .plt call stub instructions. The normal stub is like this, but
124 sometimes the .plt entry crosses a 64k boundary and we need to
125 insert an addis to adjust r12. */
126 #define PLT_CALL_STUB_SIZE (7*4)
127 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
128 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
129 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
130 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
131 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
132 /* ld %r11,xxx+16@l(%r12) */
133 #define BCTR 0x4e800420 /* bctr */
134
135
136 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
137 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
138
139 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
140
141 /* glink call stub instructions. We enter with the index in R0, and the
142 address of glink entry in CTR. From that, we can calculate PLT0. */
143 #define GLINK_CALL_STUB_SIZE (16*4)
144 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
145 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
146 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
147 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
148 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
149 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
150 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
151 /* sub %r12,%r12,%r11 */
152 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
153 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
154 /* ld %r11,xxx@l(%r12) */
155 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
156 /* ld %r2,8(%r12) */
157 /* mtctr %r11 */
158 /* ld %r11,16(%r12) */
159 /* bctr */
160
161 /* Pad with this. */
162 #define NOP 0x60000000
163
164 /* Some other nops. */
165 #define CROR_151515 0x4def7b82
166 #define CROR_313131 0x4ffffb82
167
168 /* .glink entries for the first 32k functions are two instructions. */
169 #define LI_R0_0 0x38000000 /* li %r0,0 */
170 #define B_DOT 0x48000000 /* b . */
171
172 /* After that, we need two instructions to load the index, followed by
173 a branch. */
174 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
175 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
176
177 /* Instructions used by the save and restore reg functions. */
178 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
179 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
180 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
181 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
182 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
183 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
184 #define LI_R12_0 0x39800000 /* li %r12,0 */
185 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
186 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
187 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
188 #define BLR 0x4e800020 /* blr */
189
190 /* Since .opd is an array of descriptors and each entry will end up
191 with identical R_PPC64_RELATIVE relocs, there is really no need to
192 propagate .opd relocs; The dynamic linker should be taught to
193 relocate .opd without reloc entries. */
194 #ifndef NO_OPD_RELOCS
195 #define NO_OPD_RELOCS 0
196 #endif
197 \f
198 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
199
200 /* Relocation HOWTO's. */
201 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
202
203 static reloc_howto_type ppc64_elf_howto_raw[] = {
204 /* This reloc does nothing. */
205 HOWTO (R_PPC64_NONE, /* type */
206 0, /* rightshift */
207 2, /* size (0 = byte, 1 = short, 2 = long) */
208 32, /* bitsize */
209 FALSE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_PPC64_NONE", /* name */
214 FALSE, /* partial_inplace */
215 0, /* src_mask */
216 0, /* dst_mask */
217 FALSE), /* pcrel_offset */
218
219 /* A standard 32 bit relocation. */
220 HOWTO (R_PPC64_ADDR32, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 32, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_bitfield, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_PPC64_ADDR32", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0xffffffff, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* An absolute 26 bit branch; the lower two bits must be zero.
235 FIXME: we don't check that, we just clear them. */
236 HOWTO (R_PPC64_ADDR24, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 26, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_bitfield, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_PPC64_ADDR24", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0x03fffffc, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* A standard 16 bit relocation. */
251 HOWTO (R_PPC64_ADDR16, /* type */
252 0, /* rightshift */
253 1, /* size (0 = byte, 1 = short, 2 = long) */
254 16, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_bitfield, /* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_PPC64_ADDR16", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0xffff, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* A 16 bit relocation without overflow. */
266 HOWTO (R_PPC64_ADDR16_LO, /* type */
267 0, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_dont,/* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC64_ADDR16_LO", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0xffff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 /* Bits 16-31 of an address. */
281 HOWTO (R_PPC64_ADDR16_HI, /* type */
282 16, /* rightshift */
283 1, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont, /* complain_on_overflow */
288 bfd_elf_generic_reloc, /* special_function */
289 "R_PPC64_ADDR16_HI", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
296 bits, treated as a signed number, is negative. */
297 HOWTO (R_PPC64_ADDR16_HA, /* type */
298 16, /* rightshift */
299 1, /* size (0 = byte, 1 = short, 2 = long) */
300 16, /* bitsize */
301 FALSE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_dont, /* complain_on_overflow */
304 ppc64_elf_ha_reloc, /* special_function */
305 "R_PPC64_ADDR16_HA", /* name */
306 FALSE, /* partial_inplace */
307 0, /* src_mask */
308 0xffff, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* An absolute 16 bit branch; the lower two bits must be zero.
312 FIXME: we don't check that, we just clear them. */
313 HOWTO (R_PPC64_ADDR14, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 ppc64_elf_branch_reloc, /* special_function */
321 "R_PPC64_ADDR14", /* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0x0000fffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is expected to be taken. The lower two
329 bits must be zero. */
330 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_brtaken_reloc, /* special_function */
338 "R_PPC64_ADDR14_BRTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* An absolute 16 bit branch, for which bit 10 should be set to
345 indicate that the branch is not expected to be taken. The lower
346 two bits must be zero. */
347 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 ppc64_elf_brtaken_reloc, /* special_function */
355 "R_PPC64_ADDR14_BRNTAKEN",/* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x0000fffc, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* A relative 26 bit branch; the lower two bits must be zero. */
362 HOWTO (R_PPC64_REL24, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 26, /* bitsize */
366 TRUE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_signed, /* complain_on_overflow */
369 ppc64_elf_branch_reloc, /* special_function */
370 "R_PPC64_REL24", /* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0x03fffffc, /* dst_mask */
374 TRUE), /* pcrel_offset */
375
376 /* A relative 16 bit branch; the lower two bits must be zero. */
377 HOWTO (R_PPC64_REL14, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_REL14", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is expected to be taken. The lower two bits must be
393 zero. */
394 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_REL14_BRTAKEN", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* A relative 16 bit branch. Bit 10 should be set to indicate that
409 the branch is not expected to be taken. The lower two bits must
410 be zero. */
411 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 TRUE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_REL14_BRNTAKEN",/* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 TRUE), /* pcrel_offset */
424
425 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
426 symbol. */
427 HOWTO (R_PPC64_GOT16, /* type */
428 0, /* rightshift */
429 1, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_signed, /* complain_on_overflow */
434 ppc64_elf_unhandled_reloc, /* special_function */
435 "R_PPC64_GOT16", /* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0xffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
442 the symbol. */
443 HOWTO (R_PPC64_GOT16_LO, /* type */
444 0, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 ppc64_elf_unhandled_reloc, /* special_function */
451 "R_PPC64_GOT16_LO", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
458 the symbol. */
459 HOWTO (R_PPC64_GOT16_HI, /* type */
460 16, /* rightshift */
461 1, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_dont,/* complain_on_overflow */
466 ppc64_elf_unhandled_reloc, /* special_function */
467 "R_PPC64_GOT16_HI", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
474 the symbol. */
475 HOWTO (R_PPC64_GOT16_HA, /* type */
476 16, /* rightshift */
477 1, /* size (0 = byte, 1 = short, 2 = long) */
478 16, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_dont,/* complain_on_overflow */
482 ppc64_elf_unhandled_reloc, /* special_function */
483 "R_PPC64_GOT16_HA", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0xffff, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* This is used only by the dynamic linker. The symbol should exist
490 both in the object being run and in some shared library. The
491 dynamic linker copies the data addressed by the symbol from the
492 shared library into the object, because the object being
493 run has to have the data at some particular address. */
494 HOWTO (R_PPC64_COPY, /* type */
495 0, /* rightshift */
496 0, /* this one is variable size */
497 0, /* bitsize */
498 FALSE, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_dont, /* complain_on_overflow */
501 ppc64_elf_unhandled_reloc, /* special_function */
502 "R_PPC64_COPY", /* name */
503 FALSE, /* partial_inplace */
504 0, /* src_mask */
505 0, /* dst_mask */
506 FALSE), /* pcrel_offset */
507
508 /* Like R_PPC64_ADDR64, but used when setting global offset table
509 entries. */
510 HOWTO (R_PPC64_GLOB_DAT, /* type */
511 0, /* rightshift */
512 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
513 64, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_dont, /* complain_on_overflow */
517 ppc64_elf_unhandled_reloc, /* special_function */
518 "R_PPC64_GLOB_DAT", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 ONES (64), /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Created by the link editor. Marks a procedure linkage table
525 entry for a symbol. */
526 HOWTO (R_PPC64_JMP_SLOT, /* type */
527 0, /* rightshift */
528 0, /* size (0 = byte, 1 = short, 2 = long) */
529 0, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_dont, /* complain_on_overflow */
533 ppc64_elf_unhandled_reloc, /* special_function */
534 "R_PPC64_JMP_SLOT", /* name */
535 FALSE, /* partial_inplace */
536 0, /* src_mask */
537 0, /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 /* Used only by the dynamic linker. When the object is run, this
541 doubleword64 is set to the load address of the object, plus the
542 addend. */
543 HOWTO (R_PPC64_RELATIVE, /* type */
544 0, /* rightshift */
545 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
546 64, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 bfd_elf_generic_reloc, /* special_function */
551 "R_PPC64_RELATIVE", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 ONES (64), /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Like R_PPC64_ADDR32, but may be unaligned. */
558 HOWTO (R_PPC64_UADDR32, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 32, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_bitfield, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC64_UADDR32", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0xffffffff, /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR16, but may be unaligned. */
573 HOWTO (R_PPC64_UADDR16, /* type */
574 0, /* rightshift */
575 1, /* size (0 = byte, 1 = short, 2 = long) */
576 16, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_bitfield, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_UADDR16", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* 32-bit PC relative. */
588 HOWTO (R_PPC64_REL32, /* type */
589 0, /* rightshift */
590 2, /* size (0 = byte, 1 = short, 2 = long) */
591 32, /* bitsize */
592 TRUE, /* pc_relative */
593 0, /* bitpos */
594 /* FIXME: Verify. Was complain_overflow_bitfield. */
595 complain_overflow_signed, /* complain_on_overflow */
596 bfd_elf_generic_reloc, /* special_function */
597 "R_PPC64_REL32", /* name */
598 FALSE, /* partial_inplace */
599 0, /* src_mask */
600 0xffffffff, /* dst_mask */
601 TRUE), /* pcrel_offset */
602
603 /* 32-bit relocation to the symbol's procedure linkage table. */
604 HOWTO (R_PPC64_PLT32, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 FALSE, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_bitfield, /* complain_on_overflow */
611 ppc64_elf_unhandled_reloc, /* special_function */
612 "R_PPC64_PLT32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 FALSE), /* pcrel_offset */
617
618 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
619 FIXME: R_PPC64_PLTREL32 not supported. */
620 HOWTO (R_PPC64_PLTREL32, /* type */
621 0, /* rightshift */
622 2, /* size (0 = byte, 1 = short, 2 = long) */
623 32, /* bitsize */
624 TRUE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_signed, /* complain_on_overflow */
627 bfd_elf_generic_reloc, /* special_function */
628 "R_PPC64_PLTREL32", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffffffff, /* dst_mask */
632 TRUE), /* pcrel_offset */
633
634 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
635 the symbol. */
636 HOWTO (R_PPC64_PLT16_LO, /* type */
637 0, /* rightshift */
638 1, /* size (0 = byte, 1 = short, 2 = long) */
639 16, /* bitsize */
640 FALSE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_dont, /* complain_on_overflow */
643 ppc64_elf_unhandled_reloc, /* special_function */
644 "R_PPC64_PLT16_LO", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0xffff, /* dst_mask */
648 FALSE), /* pcrel_offset */
649
650 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
651 the symbol. */
652 HOWTO (R_PPC64_PLT16_HI, /* type */
653 16, /* rightshift */
654 1, /* size (0 = byte, 1 = short, 2 = long) */
655 16, /* bitsize */
656 FALSE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_dont, /* complain_on_overflow */
659 ppc64_elf_unhandled_reloc, /* special_function */
660 "R_PPC64_PLT16_HI", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
667 the symbol. */
668 HOWTO (R_PPC64_PLT16_HA, /* type */
669 16, /* rightshift */
670 1, /* size (0 = byte, 1 = short, 2 = long) */
671 16, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 ppc64_elf_unhandled_reloc, /* special_function */
676 "R_PPC64_PLT16_HA", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0xffff, /* dst_mask */
680 FALSE), /* pcrel_offset */
681
682 /* 16-bit section relative relocation. */
683 HOWTO (R_PPC64_SECTOFF, /* type */
684 0, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_bitfield, /* complain_on_overflow */
690 ppc64_elf_sectoff_reloc, /* special_function */
691 "R_PPC64_SECTOFF", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* Like R_PPC64_SECTOFF, but no overflow warning. */
698 HOWTO (R_PPC64_SECTOFF_LO, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_dont, /* complain_on_overflow */
705 ppc64_elf_sectoff_reloc, /* special_function */
706 "R_PPC64_SECTOFF_LO", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* 16-bit upper half section relative relocation. */
713 HOWTO (R_PPC64_SECTOFF_HI, /* type */
714 16, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont, /* complain_on_overflow */
720 ppc64_elf_sectoff_reloc, /* special_function */
721 "R_PPC64_SECTOFF_HI", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit upper half adjusted section relative relocation. */
728 HOWTO (R_PPC64_SECTOFF_HA, /* type */
729 16, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc64_elf_sectoff_ha_reloc, /* special_function */
736 "R_PPC64_SECTOFF_HA", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* Like R_PPC64_REL24 without touching the two least significant bits. */
743 HOWTO (R_PPC64_REL30, /* type */
744 2, /* rightshift */
745 2, /* size (0 = byte, 1 = short, 2 = long) */
746 30, /* bitsize */
747 TRUE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_PPC64_REL30", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xfffffffc, /* dst_mask */
755 TRUE), /* pcrel_offset */
756
757 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
758
759 /* A standard 64-bit relocation. */
760 HOWTO (R_PPC64_ADDR64, /* type */
761 0, /* rightshift */
762 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
763 64, /* bitsize */
764 FALSE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_PPC64_ADDR64", /* name */
769 FALSE, /* partial_inplace */
770 0, /* src_mask */
771 ONES (64), /* dst_mask */
772 FALSE), /* pcrel_offset */
773
774 /* The bits 32-47 of an address. */
775 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
776 32, /* rightshift */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
778 16, /* bitsize */
779 FALSE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_PPC64_ADDR16_HIGHER", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 0xffff, /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 32-47 of an address, plus 1 if the contents of the low
790 16 bits, treated as a signed number, is negative. */
791 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
792 32, /* rightshift */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 ppc64_elf_ha_reloc, /* special_function */
799 "R_PPC64_ADDR16_HIGHERA", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* The bits 48-63 of an address. */
806 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
807 48, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHEST", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The bits 48-63 of an address, plus 1 if the contents of the low
821 16 bits, treated as a signed number, is negative. */
822 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
823 48, /* rightshift */
824 1, /* size (0 = byte, 1 = short, 2 = long) */
825 16, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 ppc64_elf_ha_reloc, /* special_function */
830 "R_PPC64_ADDR16_HIGHESTA", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0xffff, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 /* Like ADDR64, but may be unaligned. */
837 HOWTO (R_PPC64_UADDR64, /* type */
838 0, /* rightshift */
839 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
840 64, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_PPC64_UADDR64", /* name */
846 FALSE, /* partial_inplace */
847 0, /* src_mask */
848 ONES (64), /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* 64-bit relative relocation. */
852 HOWTO (R_PPC64_REL64, /* type */
853 0, /* rightshift */
854 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
855 64, /* bitsize */
856 TRUE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_PPC64_REL64", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 ONES (64), /* dst_mask */
864 TRUE), /* pcrel_offset */
865
866 /* 64-bit relocation to the symbol's procedure linkage table. */
867 HOWTO (R_PPC64_PLT64, /* type */
868 0, /* rightshift */
869 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
870 64, /* bitsize */
871 FALSE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 ppc64_elf_unhandled_reloc, /* special_function */
875 "R_PPC64_PLT64", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 ONES (64), /* dst_mask */
879 FALSE), /* pcrel_offset */
880
881 /* 64-bit PC relative relocation to the symbol's procedure linkage
882 table. */
883 /* FIXME: R_PPC64_PLTREL64 not supported. */
884 HOWTO (R_PPC64_PLTREL64, /* type */
885 0, /* rightshift */
886 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
887 64, /* bitsize */
888 TRUE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_dont, /* complain_on_overflow */
891 ppc64_elf_unhandled_reloc, /* special_function */
892 "R_PPC64_PLTREL64", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 ONES (64), /* dst_mask */
896 TRUE), /* pcrel_offset */
897
898 /* 16 bit TOC-relative relocation. */
899
900 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
901 HOWTO (R_PPC64_TOC16, /* type */
902 0, /* rightshift */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
904 16, /* bitsize */
905 FALSE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_signed, /* complain_on_overflow */
908 ppc64_elf_toc_reloc, /* special_function */
909 "R_PPC64_TOC16", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation without overflow. */
916
917 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
918 HOWTO (R_PPC64_TOC16_LO, /* type */
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16_LO", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation, high 16 bits. */
933
934 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_HI, /* type */
936 16, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_reloc, /* special_function */
943 "R_PPC64_TOC16_HI", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
950 contents of the low 16 bits, treated as a signed number, is
951 negative. */
952
953 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
954 HOWTO (R_PPC64_TOC16_HA, /* type */
955 16, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc64_elf_toc_ha_reloc, /* special_function */
962 "R_PPC64_TOC16_HA", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* 64-bit relocation; insert value of TOC base (.TOC.). */
969
970 /* R_PPC64_TOC 51 doubleword64 .TOC. */
971 HOWTO (R_PPC64_TOC, /* type */
972 0, /* rightshift */
973 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
974 64, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_bitfield, /* complain_on_overflow */
978 ppc64_elf_toc64_reloc, /* special_function */
979 "R_PPC64_TOC", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 ONES (64), /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like R_PPC64_GOT16, but also informs the link editor that the
986 value to relocate may (!) refer to a PLT entry which the link
987 editor (a) may replace with the symbol value. If the link editor
988 is unable to fully resolve the symbol, it may (b) create a PLT
989 entry and store the address to the new PLT entry in the GOT.
990 This permits lazy resolution of function symbols at run time.
991 The link editor may also skip all of this and just (c) emit a
992 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
993 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
994 HOWTO (R_PPC64_PLTGOT16, /* type */
995 0, /* rightshift */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
997 16, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_signed, /* complain_on_overflow */
1001 ppc64_elf_unhandled_reloc, /* special_function */
1002 "R_PPC64_PLTGOT16", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Like R_PPC64_PLTGOT16, but without overflow. */
1009 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1010 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1011 0, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_dont, /* complain_on_overflow */
1017 ppc64_elf_unhandled_reloc, /* special_function */
1018 "R_PPC64_PLTGOT16_LO", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1025 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1026 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1027 16, /* rightshift */
1028 1, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 ppc64_elf_unhandled_reloc, /* special_function */
1034 "R_PPC64_PLTGOT16_HI", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0xffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1041 1 if the contents of the low 16 bits, treated as a signed number,
1042 is negative. */
1043 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1044 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1045 16, /* rightshift */
1046 1, /* size (0 = byte, 1 = short, 2 = long) */
1047 16, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont,/* complain_on_overflow */
1051 ppc64_elf_unhandled_reloc, /* special_function */
1052 "R_PPC64_PLTGOT16_HA", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1059 HOWTO (R_PPC64_ADDR16_DS, /* type */
1060 0, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_bitfield, /* complain_on_overflow */
1066 bfd_elf_generic_reloc, /* special_function */
1067 "R_PPC64_ADDR16_DS", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xfffc, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1074 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_dont,/* complain_on_overflow */
1081 bfd_elf_generic_reloc, /* special_function */
1082 "R_PPC64_ADDR16_LO_DS",/* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xfffc, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1089 HOWTO (R_PPC64_GOT16_DS, /* type */
1090 0, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_signed, /* complain_on_overflow */
1096 ppc64_elf_unhandled_reloc, /* special_function */
1097 "R_PPC64_GOT16_DS", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xfffc, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1104 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1105 0, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 ppc64_elf_unhandled_reloc, /* special_function */
1112 "R_PPC64_GOT16_LO_DS", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xfffc, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1119 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_dont, /* complain_on_overflow */
1126 ppc64_elf_unhandled_reloc, /* special_function */
1127 "R_PPC64_PLT16_LO_DS", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xfffc, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1134 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_bitfield, /* complain_on_overflow */
1141 ppc64_elf_sectoff_reloc, /* special_function */
1142 "R_PPC64_SECTOFF_DS", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xfffc, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1149 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1150 0, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc64_elf_sectoff_reloc, /* special_function */
1157 "R_PPC64_SECTOFF_LO_DS",/* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xfffc, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1164 HOWTO (R_PPC64_TOC16_DS, /* type */
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_signed, /* complain_on_overflow */
1171 ppc64_elf_toc_reloc, /* special_function */
1172 "R_PPC64_TOC16_DS", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xfffc, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1179 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_dont, /* complain_on_overflow */
1186 ppc64_elf_toc_reloc, /* special_function */
1187 "R_PPC64_TOC16_LO_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1194 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1195 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1196 0, /* rightshift */
1197 1, /* size (0 = byte, 1 = short, 2 = long) */
1198 16, /* bitsize */
1199 FALSE, /* pc_relative */
1200 0, /* bitpos */
1201 complain_overflow_signed, /* complain_on_overflow */
1202 ppc64_elf_unhandled_reloc, /* special_function */
1203 "R_PPC64_PLTGOT16_DS", /* name */
1204 FALSE, /* partial_inplace */
1205 0, /* src_mask */
1206 0xfffc, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1208
1209 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1210 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1211 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1212 0, /* rightshift */
1213 1, /* size (0 = byte, 1 = short, 2 = long) */
1214 16, /* bitsize */
1215 FALSE, /* pc_relative */
1216 0, /* bitpos */
1217 complain_overflow_dont, /* complain_on_overflow */
1218 ppc64_elf_unhandled_reloc, /* special_function */
1219 "R_PPC64_PLTGOT16_LO_DS",/* name */
1220 FALSE, /* partial_inplace */
1221 0, /* src_mask */
1222 0xfffc, /* dst_mask */
1223 FALSE), /* pcrel_offset */
1224
1225 /* Marker reloc for TLS. */
1226 HOWTO (R_PPC64_TLS,
1227 0, /* rightshift */
1228 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 32, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 bfd_elf_generic_reloc, /* special_function */
1234 "R_PPC64_TLS", /* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Computes the load module index of the load module that contains the
1241 definition of its TLS sym. */
1242 HOWTO (R_PPC64_DTPMOD64,
1243 0, /* rightshift */
1244 4, /* size (0 = byte, 1 = short, 2 = long) */
1245 64, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_unhandled_reloc, /* special_function */
1250 "R_PPC64_DTPMOD64", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 ONES (64), /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* Computes a dtv-relative displacement, the difference between the value
1257 of sym+add and the base address of the thread-local storage block that
1258 contains the definition of sym, minus 0x8000. */
1259 HOWTO (R_PPC64_DTPREL64,
1260 0, /* rightshift */
1261 4, /* size (0 = byte, 1 = short, 2 = long) */
1262 64, /* bitsize */
1263 FALSE, /* pc_relative */
1264 0, /* bitpos */
1265 complain_overflow_dont, /* complain_on_overflow */
1266 ppc64_elf_unhandled_reloc, /* special_function */
1267 "R_PPC64_DTPREL64", /* name */
1268 FALSE, /* partial_inplace */
1269 0, /* src_mask */
1270 ONES (64), /* dst_mask */
1271 FALSE), /* pcrel_offset */
1272
1273 /* A 16 bit dtprel reloc. */
1274 HOWTO (R_PPC64_DTPREL16,
1275 0, /* rightshift */
1276 1, /* size (0 = byte, 1 = short, 2 = long) */
1277 16, /* bitsize */
1278 FALSE, /* pc_relative */
1279 0, /* bitpos */
1280 complain_overflow_signed, /* complain_on_overflow */
1281 ppc64_elf_unhandled_reloc, /* special_function */
1282 "R_PPC64_DTPREL16", /* name */
1283 FALSE, /* partial_inplace */
1284 0, /* src_mask */
1285 0xffff, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1287
1288 /* Like DTPREL16, but no overflow. */
1289 HOWTO (R_PPC64_DTPREL16_LO,
1290 0, /* rightshift */
1291 1, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 ppc64_elf_unhandled_reloc, /* special_function */
1297 "R_PPC64_DTPREL16_LO", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1304 HOWTO (R_PPC64_DTPREL16_HI,
1305 16, /* rightshift */
1306 1, /* size (0 = byte, 1 = short, 2 = long) */
1307 16, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_dont, /* complain_on_overflow */
1311 ppc64_elf_unhandled_reloc, /* special_function */
1312 "R_PPC64_DTPREL16_HI", /* name */
1313 FALSE, /* partial_inplace */
1314 0, /* src_mask */
1315 0xffff, /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1319 HOWTO (R_PPC64_DTPREL16_HA,
1320 16, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_dont, /* complain_on_overflow */
1326 ppc64_elf_unhandled_reloc, /* special_function */
1327 "R_PPC64_DTPREL16_HA", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1334 HOWTO (R_PPC64_DTPREL16_HIGHER,
1335 32, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 ppc64_elf_unhandled_reloc, /* special_function */
1342 "R_PPC64_DTPREL16_HIGHER", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1349 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1350 32, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 ppc64_elf_unhandled_reloc, /* special_function */
1357 "R_PPC64_DTPREL16_HIGHERA", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1364 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1365 48, /* rightshift */
1366 1, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL16_HIGHEST", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1379 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1380 48, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_dont, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16, but for insns with a DS field. */
1394 HOWTO (R_PPC64_DTPREL16_DS,
1395 0, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_signed, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_DS", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xfffc, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_DS, but no overflow. */
1409 HOWTO (R_PPC64_DTPREL16_LO_DS,
1410 0, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_dont, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_LO_DS", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xfffc, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Computes a tp-relative displacement, the difference between the value of
1424 sym+add and the value of the thread pointer (r13). */
1425 HOWTO (R_PPC64_TPREL64,
1426 0, /* rightshift */
1427 4, /* size (0 = byte, 1 = short, 2 = long) */
1428 64, /* bitsize */
1429 FALSE, /* pc_relative */
1430 0, /* bitpos */
1431 complain_overflow_dont, /* complain_on_overflow */
1432 ppc64_elf_unhandled_reloc, /* special_function */
1433 "R_PPC64_TPREL64", /* name */
1434 FALSE, /* partial_inplace */
1435 0, /* src_mask */
1436 ONES (64), /* dst_mask */
1437 FALSE), /* pcrel_offset */
1438
1439 /* A 16 bit tprel reloc. */
1440 HOWTO (R_PPC64_TPREL16,
1441 0, /* rightshift */
1442 1, /* size (0 = byte, 1 = short, 2 = long) */
1443 16, /* bitsize */
1444 FALSE, /* pc_relative */
1445 0, /* bitpos */
1446 complain_overflow_signed, /* complain_on_overflow */
1447 ppc64_elf_unhandled_reloc, /* special_function */
1448 "R_PPC64_TPREL16", /* name */
1449 FALSE, /* partial_inplace */
1450 0, /* src_mask */
1451 0xffff, /* dst_mask */
1452 FALSE), /* pcrel_offset */
1453
1454 /* Like TPREL16, but no overflow. */
1455 HOWTO (R_PPC64_TPREL16_LO,
1456 0, /* rightshift */
1457 1, /* size (0 = byte, 1 = short, 2 = long) */
1458 16, /* bitsize */
1459 FALSE, /* pc_relative */
1460 0, /* bitpos */
1461 complain_overflow_dont, /* complain_on_overflow */
1462 ppc64_elf_unhandled_reloc, /* special_function */
1463 "R_PPC64_TPREL16_LO", /* name */
1464 FALSE, /* partial_inplace */
1465 0, /* src_mask */
1466 0xffff, /* dst_mask */
1467 FALSE), /* pcrel_offset */
1468
1469 /* Like TPREL16_LO, but next higher group of 16 bits. */
1470 HOWTO (R_PPC64_TPREL16_HI,
1471 16, /* rightshift */
1472 1, /* size (0 = byte, 1 = short, 2 = long) */
1473 16, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 ppc64_elf_unhandled_reloc, /* special_function */
1478 "R_PPC64_TPREL16_HI", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 0xffff, /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* Like TPREL16_HI, but adjust for low 16 bits. */
1485 HOWTO (R_PPC64_TPREL16_HA,
1486 16, /* rightshift */
1487 1, /* size (0 = byte, 1 = short, 2 = long) */
1488 16, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_dont, /* complain_on_overflow */
1492 ppc64_elf_unhandled_reloc, /* special_function */
1493 "R_PPC64_TPREL16_HA", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0xffff, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Like TPREL16_HI, but next higher group of 16 bits. */
1500 HOWTO (R_PPC64_TPREL16_HIGHER,
1501 32, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_dont, /* complain_on_overflow */
1507 ppc64_elf_unhandled_reloc, /* special_function */
1508 "R_PPC64_TPREL16_HIGHER", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1515 HOWTO (R_PPC64_TPREL16_HIGHERA,
1516 32, /* rightshift */
1517 1, /* size (0 = byte, 1 = short, 2 = long) */
1518 16, /* bitsize */
1519 FALSE, /* pc_relative */
1520 0, /* bitpos */
1521 complain_overflow_dont, /* complain_on_overflow */
1522 ppc64_elf_unhandled_reloc, /* special_function */
1523 "R_PPC64_TPREL16_HIGHERA", /* name */
1524 FALSE, /* partial_inplace */
1525 0, /* src_mask */
1526 0xffff, /* dst_mask */
1527 FALSE), /* pcrel_offset */
1528
1529 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1530 HOWTO (R_PPC64_TPREL16_HIGHEST,
1531 48, /* rightshift */
1532 1, /* size (0 = byte, 1 = short, 2 = long) */
1533 16, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL16_HIGHEST", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 0xffff, /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1545 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1546 48, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_dont, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16_HIGHESTA", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16, but for insns with a DS field. */
1560 HOWTO (R_PPC64_TPREL16_DS,
1561 0, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_signed, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_DS", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xfffc, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_DS, but no overflow. */
1575 HOWTO (R_PPC64_TPREL16_LO_DS,
1576 0, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_dont, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_LO_DS", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xfffc, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1590 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1591 to the first entry relative to the TOC base (r2). */
1592 HOWTO (R_PPC64_GOT_TLSGD16,
1593 0, /* rightshift */
1594 1, /* size (0 = byte, 1 = short, 2 = long) */
1595 16, /* bitsize */
1596 FALSE, /* pc_relative */
1597 0, /* bitpos */
1598 complain_overflow_signed, /* complain_on_overflow */
1599 ppc64_elf_unhandled_reloc, /* special_function */
1600 "R_PPC64_GOT_TLSGD16", /* name */
1601 FALSE, /* partial_inplace */
1602 0, /* src_mask */
1603 0xffff, /* dst_mask */
1604 FALSE), /* pcrel_offset */
1605
1606 /* Like GOT_TLSGD16, but no overflow. */
1607 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1608 0, /* rightshift */
1609 1, /* size (0 = byte, 1 = short, 2 = long) */
1610 16, /* bitsize */
1611 FALSE, /* pc_relative */
1612 0, /* bitpos */
1613 complain_overflow_dont, /* complain_on_overflow */
1614 ppc64_elf_unhandled_reloc, /* special_function */
1615 "R_PPC64_GOT_TLSGD16_LO", /* name */
1616 FALSE, /* partial_inplace */
1617 0, /* src_mask */
1618 0xffff, /* dst_mask */
1619 FALSE), /* pcrel_offset */
1620
1621 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1622 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1623 16, /* rightshift */
1624 1, /* size (0 = byte, 1 = short, 2 = long) */
1625 16, /* bitsize */
1626 FALSE, /* pc_relative */
1627 0, /* bitpos */
1628 complain_overflow_dont, /* complain_on_overflow */
1629 ppc64_elf_unhandled_reloc, /* special_function */
1630 "R_PPC64_GOT_TLSGD16_HI", /* name */
1631 FALSE, /* partial_inplace */
1632 0, /* src_mask */
1633 0xffff, /* dst_mask */
1634 FALSE), /* pcrel_offset */
1635
1636 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1637 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1638 16, /* rightshift */
1639 1, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 FALSE, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_dont, /* complain_on_overflow */
1644 ppc64_elf_unhandled_reloc, /* special_function */
1645 "R_PPC64_GOT_TLSGD16_HA", /* name */
1646 FALSE, /* partial_inplace */
1647 0, /* src_mask */
1648 0xffff, /* dst_mask */
1649 FALSE), /* pcrel_offset */
1650
1651 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1652 with values (sym+add)@dtpmod and zero, and computes the offset to the
1653 first entry relative to the TOC base (r2). */
1654 HOWTO (R_PPC64_GOT_TLSLD16,
1655 0, /* rightshift */
1656 1, /* size (0 = byte, 1 = short, 2 = long) */
1657 16, /* bitsize */
1658 FALSE, /* pc_relative */
1659 0, /* bitpos */
1660 complain_overflow_signed, /* complain_on_overflow */
1661 ppc64_elf_unhandled_reloc, /* special_function */
1662 "R_PPC64_GOT_TLSLD16", /* name */
1663 FALSE, /* partial_inplace */
1664 0, /* src_mask */
1665 0xffff, /* dst_mask */
1666 FALSE), /* pcrel_offset */
1667
1668 /* Like GOT_TLSLD16, but no overflow. */
1669 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1670 0, /* rightshift */
1671 1, /* size (0 = byte, 1 = short, 2 = long) */
1672 16, /* bitsize */
1673 FALSE, /* pc_relative */
1674 0, /* bitpos */
1675 complain_overflow_dont, /* complain_on_overflow */
1676 ppc64_elf_unhandled_reloc, /* special_function */
1677 "R_PPC64_GOT_TLSLD16_LO", /* name */
1678 FALSE, /* partial_inplace */
1679 0, /* src_mask */
1680 0xffff, /* dst_mask */
1681 FALSE), /* pcrel_offset */
1682
1683 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1684 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1685 16, /* rightshift */
1686 1, /* size (0 = byte, 1 = short, 2 = long) */
1687 16, /* bitsize */
1688 FALSE, /* pc_relative */
1689 0, /* bitpos */
1690 complain_overflow_dont, /* complain_on_overflow */
1691 ppc64_elf_unhandled_reloc, /* special_function */
1692 "R_PPC64_GOT_TLSLD16_HI", /* name */
1693 FALSE, /* partial_inplace */
1694 0, /* src_mask */
1695 0xffff, /* dst_mask */
1696 FALSE), /* pcrel_offset */
1697
1698 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1699 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1700 16, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_dont, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_TLSLD16_HA", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xffff, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1714 the offset to the entry relative to the TOC base (r2). */
1715 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1716 0, /* rightshift */
1717 1, /* size (0 = byte, 1 = short, 2 = long) */
1718 16, /* bitsize */
1719 FALSE, /* pc_relative */
1720 0, /* bitpos */
1721 complain_overflow_signed, /* complain_on_overflow */
1722 ppc64_elf_unhandled_reloc, /* special_function */
1723 "R_PPC64_GOT_DTPREL16_DS", /* name */
1724 FALSE, /* partial_inplace */
1725 0, /* src_mask */
1726 0xfffc, /* dst_mask */
1727 FALSE), /* pcrel_offset */
1728
1729 /* Like GOT_DTPREL16_DS, but no overflow. */
1730 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1731 0, /* rightshift */
1732 1, /* size (0 = byte, 1 = short, 2 = long) */
1733 16, /* bitsize */
1734 FALSE, /* pc_relative */
1735 0, /* bitpos */
1736 complain_overflow_dont, /* complain_on_overflow */
1737 ppc64_elf_unhandled_reloc, /* special_function */
1738 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1739 FALSE, /* partial_inplace */
1740 0, /* src_mask */
1741 0xfffc, /* dst_mask */
1742 FALSE), /* pcrel_offset */
1743
1744 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1745 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1746 16, /* rightshift */
1747 1, /* size (0 = byte, 1 = short, 2 = long) */
1748 16, /* bitsize */
1749 FALSE, /* pc_relative */
1750 0, /* bitpos */
1751 complain_overflow_dont, /* complain_on_overflow */
1752 ppc64_elf_unhandled_reloc, /* special_function */
1753 "R_PPC64_GOT_DTPREL16_HI", /* name */
1754 FALSE, /* partial_inplace */
1755 0, /* src_mask */
1756 0xffff, /* dst_mask */
1757 FALSE), /* pcrel_offset */
1758
1759 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1760 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1761 16, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_dont, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_DTPREL16_HA", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xffff, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1775 offset to the entry relative to the TOC base (r2). */
1776 HOWTO (R_PPC64_GOT_TPREL16_DS,
1777 0, /* rightshift */
1778 1, /* size (0 = byte, 1 = short, 2 = long) */
1779 16, /* bitsize */
1780 FALSE, /* pc_relative */
1781 0, /* bitpos */
1782 complain_overflow_signed, /* complain_on_overflow */
1783 ppc64_elf_unhandled_reloc, /* special_function */
1784 "R_PPC64_GOT_TPREL16_DS", /* name */
1785 FALSE, /* partial_inplace */
1786 0, /* src_mask */
1787 0xfffc, /* dst_mask */
1788 FALSE), /* pcrel_offset */
1789
1790 /* Like GOT_TPREL16_DS, but no overflow. */
1791 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1792 0, /* rightshift */
1793 1, /* size (0 = byte, 1 = short, 2 = long) */
1794 16, /* bitsize */
1795 FALSE, /* pc_relative */
1796 0, /* bitpos */
1797 complain_overflow_dont, /* complain_on_overflow */
1798 ppc64_elf_unhandled_reloc, /* special_function */
1799 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1800 FALSE, /* partial_inplace */
1801 0, /* src_mask */
1802 0xfffc, /* dst_mask */
1803 FALSE), /* pcrel_offset */
1804
1805 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1806 HOWTO (R_PPC64_GOT_TPREL16_HI,
1807 16, /* rightshift */
1808 1, /* size (0 = byte, 1 = short, 2 = long) */
1809 16, /* bitsize */
1810 FALSE, /* pc_relative */
1811 0, /* bitpos */
1812 complain_overflow_dont, /* complain_on_overflow */
1813 ppc64_elf_unhandled_reloc, /* special_function */
1814 "R_PPC64_GOT_TPREL16_HI", /* name */
1815 FALSE, /* partial_inplace */
1816 0, /* src_mask */
1817 0xffff, /* dst_mask */
1818 FALSE), /* pcrel_offset */
1819
1820 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1821 HOWTO (R_PPC64_GOT_TPREL16_HA,
1822 16, /* rightshift */
1823 1, /* size (0 = byte, 1 = short, 2 = long) */
1824 16, /* bitsize */
1825 FALSE, /* pc_relative */
1826 0, /* bitpos */
1827 complain_overflow_dont, /* complain_on_overflow */
1828 ppc64_elf_unhandled_reloc, /* special_function */
1829 "R_PPC64_GOT_TPREL16_HA", /* name */
1830 FALSE, /* partial_inplace */
1831 0, /* src_mask */
1832 0xffff, /* dst_mask */
1833 FALSE), /* pcrel_offset */
1834
1835 /* GNU extension to record C++ vtable hierarchy. */
1836 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1837 0, /* rightshift */
1838 0, /* size (0 = byte, 1 = short, 2 = long) */
1839 0, /* bitsize */
1840 FALSE, /* pc_relative */
1841 0, /* bitpos */
1842 complain_overflow_dont, /* complain_on_overflow */
1843 NULL, /* special_function */
1844 "R_PPC64_GNU_VTINHERIT", /* name */
1845 FALSE, /* partial_inplace */
1846 0, /* src_mask */
1847 0, /* dst_mask */
1848 FALSE), /* pcrel_offset */
1849
1850 /* GNU extension to record C++ vtable member usage. */
1851 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1852 0, /* rightshift */
1853 0, /* size (0 = byte, 1 = short, 2 = long) */
1854 0, /* bitsize */
1855 FALSE, /* pc_relative */
1856 0, /* bitpos */
1857 complain_overflow_dont, /* complain_on_overflow */
1858 NULL, /* special_function */
1859 "R_PPC64_GNU_VTENTRY", /* name */
1860 FALSE, /* partial_inplace */
1861 0, /* src_mask */
1862 0, /* dst_mask */
1863 FALSE), /* pcrel_offset */
1864 };
1865
1866 \f
1867 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1868 be done. */
1869
1870 static void
1871 ppc_howto_init (void)
1872 {
1873 unsigned int i, type;
1874
1875 for (i = 0;
1876 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1877 i++)
1878 {
1879 type = ppc64_elf_howto_raw[i].type;
1880 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1881 / sizeof (ppc64_elf_howto_table[0])));
1882 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1883 }
1884 }
1885
1886 static reloc_howto_type *
1887 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1888 bfd_reloc_code_real_type code)
1889 {
1890 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1891
1892 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1893 /* Initialize howto table if needed. */
1894 ppc_howto_init ();
1895
1896 switch (code)
1897 {
1898 default:
1899 return NULL;
1900
1901 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1902 break;
1903 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1904 break;
1905 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1906 break;
1907 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1908 break;
1909 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1910 break;
1911 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1912 break;
1913 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1914 break;
1915 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1916 break;
1917 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1918 break;
1919 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1920 break;
1921 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1922 break;
1923 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1924 break;
1925 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1926 break;
1927 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1928 break;
1929 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1930 break;
1931 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1932 break;
1933 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1934 break;
1935 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1936 break;
1937 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1938 break;
1939 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1940 break;
1941 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1942 break;
1943 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1944 break;
1945 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1946 break;
1947 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1948 break;
1949 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1950 break;
1951 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1952 break;
1953 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1954 break;
1955 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1956 break;
1957 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1958 break;
1959 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1960 break;
1961 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1962 break;
1963 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1964 break;
1965 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1966 break;
1967 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1968 break;
1969 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1970 break;
1971 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1972 break;
1973 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1974 break;
1975 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1976 break;
1977 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1978 break;
1979 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1980 break;
1981 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1982 break;
1983 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1984 break;
1985 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1986 break;
1987 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1988 break;
1989 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1990 break;
1991 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1992 break;
1993 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1994 break;
1995 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1996 break;
1997 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2002 break;
2003 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2004 break;
2005 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2006 break;
2007 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2008 break;
2009 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2010 break;
2011 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2012 break;
2013 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2014 break;
2015 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2016 break;
2017 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2018 break;
2019 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2020 break;
2021 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2022 break;
2023 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2024 break;
2025 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2026 break;
2027 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2028 break;
2029 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2030 break;
2031 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2032 break;
2033 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2034 break;
2035 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2036 break;
2037 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2038 break;
2039 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2040 break;
2041 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2052 break;
2053 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2058 break;
2059 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2060 break;
2061 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2062 break;
2063 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2064 break;
2065 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2066 break;
2067 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2068 break;
2069 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2070 break;
2071 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2072 break;
2073 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2074 break;
2075 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2076 break;
2077 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2078 break;
2079 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2080 break;
2081 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2082 break;
2083 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2084 break;
2085 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2086 break;
2087 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2088 break;
2089 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2090 break;
2091 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2092 break;
2093 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2094 break;
2095 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2096 break;
2097 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2098 break;
2099 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2100 break;
2101 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2102 break;
2103 }
2104
2105 return ppc64_elf_howto_table[r];
2106 };
2107
2108 /* Set the howto pointer for a PowerPC ELF reloc. */
2109
2110 static void
2111 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2112 Elf_Internal_Rela *dst)
2113 {
2114 unsigned int type;
2115
2116 /* Initialize howto table if needed. */
2117 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2118 ppc_howto_init ();
2119
2120 type = ELF64_R_TYPE (dst->r_info);
2121 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2122 / sizeof (ppc64_elf_howto_table[0])));
2123 cache_ptr->howto = ppc64_elf_howto_table[type];
2124 }
2125
2126 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2127
2128 static bfd_reloc_status_type
2129 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2130 void *data, asection *input_section,
2131 bfd *output_bfd, char **error_message)
2132 {
2133 /* If this is a relocatable link (output_bfd test tells us), just
2134 call the generic function. Any adjustment will be done at final
2135 link time. */
2136 if (output_bfd != NULL)
2137 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2138 input_section, output_bfd, error_message);
2139
2140 /* Adjust the addend for sign extension of the low 16 bits.
2141 We won't actually be using the low 16 bits, so trashing them
2142 doesn't matter. */
2143 reloc_entry->addend += 0x8000;
2144 return bfd_reloc_continue;
2145 }
2146
2147 static bfd_reloc_status_type
2148 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2149 void *data, asection *input_section,
2150 bfd *output_bfd, char **error_message)
2151 {
2152 if (output_bfd != NULL)
2153 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2154 input_section, output_bfd, error_message);
2155
2156 if (strcmp (symbol->section->name, ".opd") == 0
2157 && (symbol->section->owner->flags & DYNAMIC) == 0)
2158 {
2159 bfd_vma dest = opd_entry_value (symbol->section,
2160 symbol->value + reloc_entry->addend,
2161 NULL, NULL);
2162 if (dest != (bfd_vma) -1)
2163 reloc_entry->addend = dest - (symbol->value
2164 + symbol->section->output_section->vma
2165 + symbol->section->output_offset);
2166 }
2167 return bfd_reloc_continue;
2168 }
2169
2170 static bfd_reloc_status_type
2171 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2172 void *data, asection *input_section,
2173 bfd *output_bfd, char **error_message)
2174 {
2175 long insn;
2176 enum elf_ppc64_reloc_type r_type;
2177 bfd_size_type octets;
2178 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2179 bfd_boolean is_power4 = FALSE;
2180
2181 /* If this is a relocatable link (output_bfd test tells us), just
2182 call the generic function. Any adjustment will be done at final
2183 link time. */
2184 if (output_bfd != NULL)
2185 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2186 input_section, output_bfd, error_message);
2187
2188 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2189 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2190 insn &= ~(0x01 << 21);
2191 r_type = reloc_entry->howto->type;
2192 if (r_type == R_PPC64_ADDR14_BRTAKEN
2193 || r_type == R_PPC64_REL14_BRTAKEN)
2194 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2195
2196 if (is_power4)
2197 {
2198 /* Set 'a' bit. This is 0b00010 in BO field for branch
2199 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2200 for branch on CTR insns (BO == 1a00t or 1a01t). */
2201 if ((insn & (0x14 << 21)) == (0x04 << 21))
2202 insn |= 0x02 << 21;
2203 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2204 insn |= 0x08 << 21;
2205 else
2206 goto out;
2207 }
2208 else
2209 {
2210 bfd_vma target = 0;
2211 bfd_vma from;
2212
2213 if (!bfd_is_com_section (symbol->section))
2214 target = symbol->value;
2215 target += symbol->section->output_section->vma;
2216 target += symbol->section->output_offset;
2217 target += reloc_entry->addend;
2218
2219 from = (reloc_entry->address
2220 + input_section->output_offset
2221 + input_section->output_section->vma);
2222
2223 /* Invert 'y' bit if not the default. */
2224 if ((bfd_signed_vma) (target - from) < 0)
2225 insn ^= 0x01 << 21;
2226 }
2227 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2228 out:
2229 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2230 input_section, output_bfd, error_message);
2231 }
2232
2233 static bfd_reloc_status_type
2234 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2235 void *data, asection *input_section,
2236 bfd *output_bfd, char **error_message)
2237 {
2238 /* If this is a relocatable link (output_bfd test tells us), just
2239 call the generic function. Any adjustment will be done at final
2240 link time. */
2241 if (output_bfd != NULL)
2242 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2243 input_section, output_bfd, error_message);
2244
2245 /* Subtract the symbol section base address. */
2246 reloc_entry->addend -= symbol->section->output_section->vma;
2247 return bfd_reloc_continue;
2248 }
2249
2250 static bfd_reloc_status_type
2251 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2252 void *data, asection *input_section,
2253 bfd *output_bfd, char **error_message)
2254 {
2255 /* If this is a relocatable link (output_bfd test tells us), just
2256 call the generic function. Any adjustment will be done at final
2257 link time. */
2258 if (output_bfd != NULL)
2259 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2260 input_section, output_bfd, error_message);
2261
2262 /* Subtract the symbol section base address. */
2263 reloc_entry->addend -= symbol->section->output_section->vma;
2264
2265 /* Adjust the addend for sign extension of the low 16 bits. */
2266 reloc_entry->addend += 0x8000;
2267 return bfd_reloc_continue;
2268 }
2269
2270 static bfd_reloc_status_type
2271 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2272 void *data, asection *input_section,
2273 bfd *output_bfd, char **error_message)
2274 {
2275 bfd_vma TOCstart;
2276
2277 /* If this is a relocatable link (output_bfd test tells us), just
2278 call the generic function. Any adjustment will be done at final
2279 link time. */
2280 if (output_bfd != NULL)
2281 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2282 input_section, output_bfd, error_message);
2283
2284 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2285 if (TOCstart == 0)
2286 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2287
2288 /* Subtract the TOC base address. */
2289 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2290 return bfd_reloc_continue;
2291 }
2292
2293 static bfd_reloc_status_type
2294 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2295 void *data, asection *input_section,
2296 bfd *output_bfd, char **error_message)
2297 {
2298 bfd_vma TOCstart;
2299
2300 /* If this is a relocatable link (output_bfd test tells us), just
2301 call the generic function. Any adjustment will be done at final
2302 link time. */
2303 if (output_bfd != NULL)
2304 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2305 input_section, output_bfd, error_message);
2306
2307 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2308 if (TOCstart == 0)
2309 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2310
2311 /* Subtract the TOC base address. */
2312 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2313
2314 /* Adjust the addend for sign extension of the low 16 bits. */
2315 reloc_entry->addend += 0x8000;
2316 return bfd_reloc_continue;
2317 }
2318
2319 static bfd_reloc_status_type
2320 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2321 void *data, asection *input_section,
2322 bfd *output_bfd, char **error_message)
2323 {
2324 bfd_vma TOCstart;
2325 bfd_size_type octets;
2326
2327 /* If this is a relocatable link (output_bfd test tells us), just
2328 call the generic function. Any adjustment will be done at final
2329 link time. */
2330 if (output_bfd != NULL)
2331 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2332 input_section, output_bfd, error_message);
2333
2334 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2335 if (TOCstart == 0)
2336 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2337
2338 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2339 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2340 return bfd_reloc_ok;
2341 }
2342
2343 static bfd_reloc_status_type
2344 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2345 void *data, asection *input_section,
2346 bfd *output_bfd, char **error_message)
2347 {
2348 /* If this is a relocatable link (output_bfd test tells us), just
2349 call the generic function. Any adjustment will be done at final
2350 link time. */
2351 if (output_bfd != NULL)
2352 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2353 input_section, output_bfd, error_message);
2354
2355 if (error_message != NULL)
2356 {
2357 static char buf[60];
2358 sprintf (buf, "generic linker can't handle %s",
2359 reloc_entry->howto->name);
2360 *error_message = buf;
2361 }
2362 return bfd_reloc_dangerous;
2363 }
2364
2365 struct ppc64_elf_obj_tdata
2366 {
2367 struct elf_obj_tdata elf;
2368
2369 /* Shortcuts to dynamic linker sections. */
2370 asection *got;
2371 asection *relgot;
2372
2373 /* Used during garbage collection. We attach global symbols defined
2374 on removed .opd entries to this section so that the sym is removed. */
2375 asection *deleted_section;
2376
2377 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2378 sections means we potentially need one of these for each input bfd. */
2379 union {
2380 bfd_signed_vma refcount;
2381 bfd_vma offset;
2382 } tlsld_got;
2383
2384 /* A copy of relocs before they are modified for --emit-relocs. */
2385 Elf_Internal_Rela *opd_relocs;
2386 };
2387
2388 #define ppc64_elf_tdata(bfd) \
2389 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2390
2391 #define ppc64_tlsld_got(bfd) \
2392 (&ppc64_elf_tdata (bfd)->tlsld_got)
2393
2394 /* Override the generic function because we store some extras. */
2395
2396 static bfd_boolean
2397 ppc64_elf_mkobject (bfd *abfd)
2398 {
2399 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2400 abfd->tdata.any = bfd_zalloc (abfd, amt);
2401 if (abfd->tdata.any == NULL)
2402 return FALSE;
2403 return TRUE;
2404 }
2405
2406 /* Return 1 if target is one of ours. */
2407
2408 static bfd_boolean
2409 is_ppc64_elf_target (const struct bfd_target *targ)
2410 {
2411 extern const bfd_target bfd_elf64_powerpc_vec;
2412 extern const bfd_target bfd_elf64_powerpcle_vec;
2413
2414 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2415 }
2416
2417 /* Fix bad default arch selected for a 64 bit input bfd when the
2418 default is 32 bit. */
2419
2420 static bfd_boolean
2421 ppc64_elf_object_p (bfd *abfd)
2422 {
2423 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2424 {
2425 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2426
2427 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2428 {
2429 /* Relies on arch after 32 bit default being 64 bit default. */
2430 abfd->arch_info = abfd->arch_info->next;
2431 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2432 }
2433 }
2434 return TRUE;
2435 }
2436
2437 /* Support for core dump NOTE sections. */
2438
2439 static bfd_boolean
2440 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2441 {
2442 size_t offset, size;
2443
2444 if (note->descsz != 504)
2445 return FALSE;
2446
2447 /* pr_cursig */
2448 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2449
2450 /* pr_pid */
2451 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2452
2453 /* pr_reg */
2454 offset = 112;
2455 size = 384;
2456
2457 /* Make a ".reg/999" section. */
2458 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2459 size, note->descpos + offset);
2460 }
2461
2462 static bfd_boolean
2463 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2464 {
2465 if (note->descsz != 136)
2466 return FALSE;
2467
2468 elf_tdata (abfd)->core_program
2469 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2470 elf_tdata (abfd)->core_command
2471 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2472
2473 return TRUE;
2474 }
2475
2476 /* Merge backend specific data from an object file to the output
2477 object file when linking. */
2478
2479 static bfd_boolean
2480 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2481 {
2482 /* Check if we have the same endianess. */
2483 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2484 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2485 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2486 {
2487 const char *msg;
2488
2489 if (bfd_big_endian (ibfd))
2490 msg = _("%B: compiled for a big endian system "
2491 "and target is little endian");
2492 else
2493 msg = _("%B: compiled for a little endian system "
2494 "and target is big endian");
2495
2496 (*_bfd_error_handler) (msg, ibfd);
2497
2498 bfd_set_error (bfd_error_wrong_format);
2499 return FALSE;
2500 }
2501
2502 return TRUE;
2503 }
2504
2505 /* Add extra PPC sections. */
2506
2507 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2508 {
2509 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2510 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2511 { ".plt", 4, 0, SHT_NOBITS, 0 },
2512 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2513 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2514 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2515 { NULL, 0, 0, 0, 0 }
2516 };
2517
2518 struct _ppc64_elf_section_data
2519 {
2520 struct bfd_elf_section_data elf;
2521
2522 /* An array with one entry for each opd function descriptor. */
2523 union
2524 {
2525 /* Points to the function code section for local opd entries. */
2526 asection **func_sec;
2527 /* After editing .opd, adjust references to opd local syms. */
2528 long *adjust;
2529 } opd;
2530
2531 /* An array for toc sections, indexed by offset/8.
2532 Specifies the relocation symbol index used at a given toc offset. */
2533 unsigned *t_symndx;
2534 };
2535
2536 #define ppc64_elf_section_data(sec) \
2537 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2538
2539 static bfd_boolean
2540 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2541 {
2542 struct _ppc64_elf_section_data *sdata;
2543 bfd_size_type amt = sizeof (*sdata);
2544
2545 sdata = bfd_zalloc (abfd, amt);
2546 if (sdata == NULL)
2547 return FALSE;
2548 sec->used_by_bfd = sdata;
2549
2550 return _bfd_elf_new_section_hook (abfd, sec);
2551 }
2552
2553 static void *
2554 get_opd_info (asection * sec)
2555 {
2556 if (sec != NULL
2557 && ppc64_elf_section_data (sec) != NULL
2558 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2559 return ppc64_elf_section_data (sec)->opd.adjust;
2560 return NULL;
2561 }
2562 \f
2563 /* Parameters for the qsort hook. */
2564 static asection *synthetic_opd;
2565 static bfd_boolean synthetic_relocatable;
2566
2567 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2568
2569 static int
2570 compare_symbols (const void *ap, const void *bp)
2571 {
2572 const asymbol *a = * (const asymbol **) ap;
2573 const asymbol *b = * (const asymbol **) bp;
2574
2575 /* Section symbols first. */
2576 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2577 return -1;
2578 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2579 return 1;
2580
2581 /* then .opd symbols. */
2582 if (a->section == synthetic_opd && b->section != synthetic_opd)
2583 return -1;
2584 if (a->section != synthetic_opd && b->section == synthetic_opd)
2585 return 1;
2586
2587 /* then other code symbols. */
2588 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2589 == (SEC_CODE | SEC_ALLOC)
2590 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2591 != (SEC_CODE | SEC_ALLOC))
2592 return -1;
2593
2594 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2595 != (SEC_CODE | SEC_ALLOC)
2596 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2597 == (SEC_CODE | SEC_ALLOC))
2598 return 1;
2599
2600 if (synthetic_relocatable)
2601 {
2602 if (a->section->id < b->section->id)
2603 return -1;
2604
2605 if (a->section->id > b->section->id)
2606 return 1;
2607 }
2608
2609 if (a->value + a->section->vma < b->value + b->section->vma)
2610 return -1;
2611
2612 if (a->value + a->section->vma > b->value + b->section->vma)
2613 return 1;
2614
2615 return 0;
2616 }
2617
2618 /* Search SYMS for a symbol of the given VALUE. */
2619
2620 static asymbol *
2621 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2622 {
2623 long mid;
2624
2625 if (id == -1)
2626 {
2627 while (lo < hi)
2628 {
2629 mid = (lo + hi) >> 1;
2630 if (syms[mid]->value + syms[mid]->section->vma < value)
2631 lo = mid + 1;
2632 else if (syms[mid]->value + syms[mid]->section->vma > value)
2633 hi = mid;
2634 else
2635 return syms[mid];
2636 }
2637 }
2638 else
2639 {
2640 while (lo < hi)
2641 {
2642 mid = (lo + hi) >> 1;
2643 if (syms[mid]->section->id < id)
2644 lo = mid + 1;
2645 else if (syms[mid]->section->id > id)
2646 hi = mid;
2647 else if (syms[mid]->value < value)
2648 lo = mid + 1;
2649 else if (syms[mid]->value > value)
2650 hi = mid;
2651 else
2652 return syms[mid];
2653 }
2654 }
2655 return NULL;
2656 }
2657
2658 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2659 entry syms. */
2660
2661 static long
2662 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2663 long static_count, asymbol **static_syms,
2664 long dyn_count, asymbol **dyn_syms,
2665 asymbol **ret)
2666 {
2667 asymbol *s;
2668 long i;
2669 long count;
2670 char *names;
2671 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2672 asection *opd;
2673 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2674 asymbol **syms;
2675
2676 *ret = NULL;
2677
2678 opd = bfd_get_section_by_name (abfd, ".opd");
2679 if (opd == NULL)
2680 return 0;
2681
2682 symcount = static_count;
2683 if (!relocatable)
2684 symcount += dyn_count;
2685 if (symcount == 0)
2686 return 0;
2687
2688 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2689 if (syms == NULL)
2690 return 0;
2691
2692 if (!relocatable && static_count != 0 && dyn_count != 0)
2693 {
2694 /* Use both symbol tables. */
2695 memcpy (syms, static_syms, static_count * sizeof (*syms));
2696 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2697 }
2698 else if (!relocatable && static_count == 0)
2699 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2700 else
2701 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2702
2703 synthetic_opd = opd;
2704 synthetic_relocatable = relocatable;
2705 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2706
2707 if (!relocatable && symcount > 1)
2708 {
2709 long j;
2710 /* Trim duplicate syms, since we may have merged the normal and
2711 dynamic symbols. Actually, we only care about syms that have
2712 different values, so trim any with the same value. */
2713 for (i = 1, j = 1; i < symcount; ++i)
2714 if (syms[i - 1]->value + syms[i - 1]->section->vma
2715 != syms[i]->value + syms[i]->section->vma)
2716 syms[j++] = syms[i];
2717 symcount = j;
2718 }
2719
2720 i = 0;
2721 if (syms[i]->section == opd)
2722 ++i;
2723 codesecsym = i;
2724
2725 for (; i < symcount; ++i)
2726 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2727 != (SEC_CODE | SEC_ALLOC))
2728 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2729 break;
2730 codesecsymend = i;
2731
2732 for (; i < symcount; ++i)
2733 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2734 break;
2735 secsymend = i;
2736
2737 for (; i < symcount; ++i)
2738 if (syms[i]->section != opd)
2739 break;
2740 opdsymend = i;
2741
2742 for (; i < symcount; ++i)
2743 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2744 != (SEC_CODE | SEC_ALLOC))
2745 break;
2746 symcount = i;
2747
2748 count = 0;
2749 if (opdsymend == secsymend)
2750 goto done;
2751
2752 if (relocatable)
2753 {
2754 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2755 arelent *r;
2756 size_t size;
2757 long relcount;
2758
2759 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2760 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2761
2762 if (! relcount
2763 || ! (*slurp_relocs) (abfd, opd, static_syms, FALSE))
2764 goto done;
2765
2766 size = 0;
2767 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2768 {
2769 asymbol *sym;
2770
2771 while (r < opd->relocation + relcount
2772 && r->address < syms[i]->value + opd->vma)
2773 ++r;
2774
2775 if (r == opd->relocation + relcount)
2776 break;
2777
2778 if (r->address != syms[i]->value + opd->vma)
2779 continue;
2780
2781 if (r->howto->type != R_PPC64_ADDR64)
2782 continue;
2783
2784 sym = *r->sym_ptr_ptr;
2785 if (!sym_exists_at (syms, opdsymend, symcount,
2786 sym->section->id, sym->value + r->addend))
2787 {
2788 ++count;
2789 size += sizeof (asymbol);
2790 size += strlen (syms[i]->name) + 2;
2791 }
2792 }
2793
2794 s = *ret = bfd_malloc (size);
2795 if (s == NULL)
2796 {
2797 count = 0;
2798 goto done;
2799 }
2800
2801 names = (char *) (s + count);
2802
2803 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2804 {
2805 asymbol *sym;
2806
2807 while (r < opd->relocation + relcount
2808 && r->address < syms[i]->value + opd->vma)
2809 ++r;
2810
2811 if (r == opd->relocation + relcount)
2812 break;
2813
2814 if (r->address != syms[i]->value + opd->vma)
2815 continue;
2816
2817 if (r->howto->type != R_PPC64_ADDR64)
2818 continue;
2819
2820 sym = *r->sym_ptr_ptr;
2821 if (!sym_exists_at (syms, opdsymend, symcount,
2822 sym->section->id, sym->value + r->addend))
2823 {
2824 size_t len;
2825
2826 *s = *syms[i];
2827 s->section = sym->section;
2828 s->value = sym->value + r->addend;
2829 s->name = names;
2830 *names++ = '.';
2831 len = strlen (syms[i]->name);
2832 memcpy (names, syms[i]->name, len + 1);
2833 names += len + 1;
2834 s++;
2835 }
2836 }
2837 }
2838 else
2839 {
2840 bfd_byte *contents;
2841 size_t size;
2842
2843 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2844 {
2845 if (contents)
2846 {
2847 free_contents_and_exit:
2848 free (contents);
2849 }
2850 goto done;
2851 }
2852
2853 size = 0;
2854 for (i = secsymend; i < opdsymend; ++i)
2855 {
2856 bfd_vma ent;
2857
2858 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2859 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2860 {
2861 ++count;
2862 size += sizeof (asymbol);
2863 size += strlen (syms[i]->name) + 2;
2864 }
2865 }
2866
2867 s = *ret = bfd_malloc (size);
2868 if (s == NULL)
2869 {
2870 count = 0;
2871 goto free_contents_and_exit;
2872 }
2873
2874 names = (char *) (s + count);
2875
2876 for (i = secsymend; i < opdsymend; ++i)
2877 {
2878 bfd_vma ent;
2879
2880 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2881 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2882 {
2883 long lo, hi;
2884 size_t len;
2885 asection *sec = abfd->sections;
2886
2887 *s = *syms[i];
2888 lo = codesecsym;
2889 hi = codesecsymend;
2890 while (lo < hi)
2891 {
2892 long mid = (lo + hi) >> 1;
2893 if (syms[mid]->section->vma < ent)
2894 lo = mid + 1;
2895 else if (syms[mid]->section->vma > ent)
2896 hi = mid;
2897 else
2898 {
2899 sec = syms[mid]->section;
2900 break;
2901 }
2902 }
2903
2904 if (lo >= hi && lo > codesecsym)
2905 sec = syms[lo - 1]->section;
2906
2907 for (; sec != NULL; sec = sec->next)
2908 {
2909 if (sec->vma > ent)
2910 break;
2911 if ((sec->flags & SEC_ALLOC) == 0
2912 || (sec->flags & SEC_LOAD) == 0)
2913 break;
2914 if ((sec->flags & SEC_CODE) != 0)
2915 s->section = sec;
2916 }
2917 s->value = ent - s->section->vma;
2918 s->name = names;
2919 *names++ = '.';
2920 len = strlen (syms[i]->name);
2921 memcpy (names, syms[i]->name, len + 1);
2922 names += len + 1;
2923 s++;
2924 }
2925 }
2926 free (contents);
2927 }
2928
2929 done:
2930 free (syms);
2931 return count;
2932 }
2933 \f
2934 /* The following functions are specific to the ELF linker, while
2935 functions above are used generally. Those named ppc64_elf_* are
2936 called by the main ELF linker code. They appear in this file more
2937 or less in the order in which they are called. eg.
2938 ppc64_elf_check_relocs is called early in the link process,
2939 ppc64_elf_finish_dynamic_sections is one of the last functions
2940 called.
2941
2942 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2943 functions have both a function code symbol and a function descriptor
2944 symbol. A call to foo in a relocatable object file looks like:
2945
2946 . .text
2947 . x:
2948 . bl .foo
2949 . nop
2950
2951 The function definition in another object file might be:
2952
2953 . .section .opd
2954 . foo: .quad .foo
2955 . .quad .TOC.@tocbase
2956 . .quad 0
2957 .
2958 . .text
2959 . .foo: blr
2960
2961 When the linker resolves the call during a static link, the branch
2962 unsurprisingly just goes to .foo and the .opd information is unused.
2963 If the function definition is in a shared library, things are a little
2964 different: The call goes via a plt call stub, the opd information gets
2965 copied to the plt, and the linker patches the nop.
2966
2967 . x:
2968 . bl .foo_stub
2969 . ld 2,40(1)
2970 .
2971 .
2972 . .foo_stub:
2973 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2974 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2975 . std 2,40(1) # this is the general idea
2976 . ld 11,0(12)
2977 . ld 2,8(12)
2978 . mtctr 11
2979 . ld 11,16(12)
2980 . bctr
2981 .
2982 . .section .plt
2983 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2984
2985 The "reloc ()" notation is supposed to indicate that the linker emits
2986 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2987 copying.
2988
2989 What are the difficulties here? Well, firstly, the relocations
2990 examined by the linker in check_relocs are against the function code
2991 sym .foo, while the dynamic relocation in the plt is emitted against
2992 the function descriptor symbol, foo. Somewhere along the line, we need
2993 to carefully copy dynamic link information from one symbol to the other.
2994 Secondly, the generic part of the elf linker will make .foo a dynamic
2995 symbol as is normal for most other backends. We need foo dynamic
2996 instead, at least for an application final link. However, when
2997 creating a shared library containing foo, we need to have both symbols
2998 dynamic so that references to .foo are satisfied during the early
2999 stages of linking. Otherwise the linker might decide to pull in a
3000 definition from some other object, eg. a static library.
3001
3002 Update: As of August 2004, we support a new convention. Function
3003 calls may use the function descriptor symbol, ie. "bl foo". This
3004 behaves exactly as "bl .foo". */
3005
3006 /* The linker needs to keep track of the number of relocs that it
3007 decides to copy as dynamic relocs in check_relocs for each symbol.
3008 This is so that it can later discard them if they are found to be
3009 unnecessary. We store the information in a field extending the
3010 regular ELF linker hash table. */
3011
3012 struct ppc_dyn_relocs
3013 {
3014 struct ppc_dyn_relocs *next;
3015
3016 /* The input section of the reloc. */
3017 asection *sec;
3018
3019 /* Total number of relocs copied for the input section. */
3020 bfd_size_type count;
3021
3022 /* Number of pc-relative relocs copied for the input section. */
3023 bfd_size_type pc_count;
3024 };
3025
3026 /* Track GOT entries needed for a given symbol. We might need more
3027 than one got entry per symbol. */
3028 struct got_entry
3029 {
3030 struct got_entry *next;
3031
3032 /* The symbol addend that we'll be placing in the GOT. */
3033 bfd_vma addend;
3034
3035 /* Unlike other ELF targets, we use separate GOT entries for the same
3036 symbol referenced from different input files. This is to support
3037 automatic multiple TOC/GOT sections, where the TOC base can vary
3038 from one input file to another.
3039
3040 Point to the BFD owning this GOT entry. */
3041 bfd *owner;
3042
3043 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3044 TLS_TPREL or TLS_DTPREL for tls entries. */
3045 char tls_type;
3046
3047 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3048 union
3049 {
3050 bfd_signed_vma refcount;
3051 bfd_vma offset;
3052 } got;
3053 };
3054
3055 /* The same for PLT. */
3056 struct plt_entry
3057 {
3058 struct plt_entry *next;
3059
3060 bfd_vma addend;
3061
3062 union
3063 {
3064 bfd_signed_vma refcount;
3065 bfd_vma offset;
3066 } plt;
3067 };
3068
3069 /* Of those relocs that might be copied as dynamic relocs, this macro
3070 selects those that must be copied when linking a shared library,
3071 even when the symbol is local. */
3072
3073 #define MUST_BE_DYN_RELOC(RTYPE) \
3074 ((RTYPE) != R_PPC64_REL32 \
3075 && (RTYPE) != R_PPC64_REL64 \
3076 && (RTYPE) != R_PPC64_REL30)
3077
3078 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3079 copying dynamic variables from a shared lib into an app's dynbss
3080 section, and instead use a dynamic relocation to point into the
3081 shared lib. With code that gcc generates, it's vital that this be
3082 enabled; In the PowerPC64 ABI, the address of a function is actually
3083 the address of a function descriptor, which resides in the .opd
3084 section. gcc uses the descriptor directly rather than going via the
3085 GOT as some other ABI's do, which means that initialized function
3086 pointers must reference the descriptor. Thus, a function pointer
3087 initialized to the address of a function in a shared library will
3088 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3089 redefines the function descriptor symbol to point to the copy. This
3090 presents a problem as a plt entry for that function is also
3091 initialized from the function descriptor symbol and the copy reloc
3092 may not be initialized first. */
3093 #define ELIMINATE_COPY_RELOCS 1
3094
3095 /* Section name for stubs is the associated section name plus this
3096 string. */
3097 #define STUB_SUFFIX ".stub"
3098
3099 /* Linker stubs.
3100 ppc_stub_long_branch:
3101 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3102 destination, but a 24 bit branch in a stub section will reach.
3103 . b dest
3104
3105 ppc_stub_plt_branch:
3106 Similar to the above, but a 24 bit branch in the stub section won't
3107 reach its destination.
3108 . addis %r12,%r2,xxx@toc@ha
3109 . ld %r11,xxx@toc@l(%r12)
3110 . mtctr %r11
3111 . bctr
3112
3113 ppc_stub_plt_call:
3114 Used to call a function in a shared library. If it so happens that
3115 the plt entry referenced crosses a 64k boundary, then an extra
3116 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3117 xxx+16 as appropriate.
3118 . addis %r12,%r2,xxx@toc@ha
3119 . std %r2,40(%r1)
3120 . ld %r11,xxx+0@toc@l(%r12)
3121 . ld %r2,xxx+8@toc@l(%r12)
3122 . mtctr %r11
3123 . ld %r11,xxx+16@toc@l(%r12)
3124 . bctr
3125
3126 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3127 code to adjust the value and save r2 to support multiple toc sections.
3128 A ppc_stub_long_branch with an r2 offset looks like:
3129 . std %r2,40(%r1)
3130 . addis %r2,%r2,off@ha
3131 . addi %r2,%r2,off@l
3132 . b dest
3133
3134 A ppc_stub_plt_branch with an r2 offset looks like:
3135 . std %r2,40(%r1)
3136 . addis %r12,%r2,xxx@toc@ha
3137 . ld %r11,xxx@toc@l(%r12)
3138 . addis %r2,%r2,off@ha
3139 . addi %r2,%r2,off@l
3140 . mtctr %r11
3141 . bctr
3142 */
3143
3144 enum ppc_stub_type {
3145 ppc_stub_none,
3146 ppc_stub_long_branch,
3147 ppc_stub_long_branch_r2off,
3148 ppc_stub_plt_branch,
3149 ppc_stub_plt_branch_r2off,
3150 ppc_stub_plt_call
3151 };
3152
3153 struct ppc_stub_hash_entry {
3154
3155 /* Base hash table entry structure. */
3156 struct bfd_hash_entry root;
3157
3158 enum ppc_stub_type stub_type;
3159
3160 /* The stub section. */
3161 asection *stub_sec;
3162
3163 /* Offset within stub_sec of the beginning of this stub. */
3164 bfd_vma stub_offset;
3165
3166 /* Given the symbol's value and its section we can determine its final
3167 value when building the stubs (so the stub knows where to jump. */
3168 bfd_vma target_value;
3169 asection *target_section;
3170
3171 /* The symbol table entry, if any, that this was derived from. */
3172 struct ppc_link_hash_entry *h;
3173
3174 /* And the reloc addend that this was derived from. */
3175 bfd_vma addend;
3176
3177 /* Where this stub is being called from, or, in the case of combined
3178 stub sections, the first input section in the group. */
3179 asection *id_sec;
3180 };
3181
3182 struct ppc_branch_hash_entry {
3183
3184 /* Base hash table entry structure. */
3185 struct bfd_hash_entry root;
3186
3187 /* Offset within .branch_lt. */
3188 unsigned int offset;
3189
3190 /* Generation marker. */
3191 unsigned int iter;
3192 };
3193
3194 struct ppc_link_hash_entry
3195 {
3196 struct elf_link_hash_entry elf;
3197
3198 /* A pointer to the most recently used stub hash entry against this
3199 symbol. */
3200 struct ppc_stub_hash_entry *stub_cache;
3201
3202 /* Track dynamic relocs copied for this symbol. */
3203 struct ppc_dyn_relocs *dyn_relocs;
3204
3205 /* Link between function code and descriptor symbols. */
3206 struct ppc_link_hash_entry *oh;
3207
3208 /* Flag function code and descriptor symbols. */
3209 unsigned int is_func:1;
3210 unsigned int is_func_descriptor:1;
3211
3212 /* Whether global opd/toc sym has been adjusted or not.
3213 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3214 should be set for all globals defined in any opd/toc section. */
3215 unsigned int adjust_done:1;
3216
3217 /* Set if we twiddled this symbol to weak at some stage. */
3218 unsigned int was_undefined:1;
3219
3220 /* Contexts in which symbol is used in the GOT (or TOC).
3221 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3222 corresponding relocs are encountered during check_relocs.
3223 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3224 indicate the corresponding GOT entry type is not needed.
3225 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3226 a TPREL one. We use a separate flag rather than setting TPREL
3227 just for convenience in distinguishing the two cases. */
3228 #define TLS_GD 1 /* GD reloc. */
3229 #define TLS_LD 2 /* LD reloc. */
3230 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3231 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3232 #define TLS_TLS 16 /* Any TLS reloc. */
3233 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3234 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3235 char tls_mask;
3236 };
3237
3238 /* ppc64 ELF linker hash table. */
3239
3240 struct ppc_link_hash_table
3241 {
3242 struct elf_link_hash_table elf;
3243
3244 /* The stub hash table. */
3245 struct bfd_hash_table stub_hash_table;
3246
3247 /* Another hash table for plt_branch stubs. */
3248 struct bfd_hash_table branch_hash_table;
3249
3250 /* Linker stub bfd. */
3251 bfd *stub_bfd;
3252
3253 /* Linker call-backs. */
3254 asection * (*add_stub_section) (const char *, asection *);
3255 void (*layout_sections_again) (void);
3256
3257 /* Array to keep track of which stub sections have been created, and
3258 information on stub grouping. */
3259 struct map_stub {
3260 /* This is the section to which stubs in the group will be attached. */
3261 asection *link_sec;
3262 /* The stub section. */
3263 asection *stub_sec;
3264 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3265 bfd_vma toc_off;
3266 } *stub_group;
3267
3268 /* Temp used when calculating TOC pointers. */
3269 bfd_vma toc_curr;
3270
3271 /* Highest input section id. */
3272 int top_id;
3273
3274 /* Highest output section index. */
3275 int top_index;
3276
3277 /* List of input sections for each output section. */
3278 asection **input_list;
3279
3280 /* Short-cuts to get to dynamic linker sections. */
3281 asection *got;
3282 asection *plt;
3283 asection *relplt;
3284 asection *dynbss;
3285 asection *relbss;
3286 asection *glink;
3287 asection *sfpr;
3288 asection *brlt;
3289 asection *relbrlt;
3290
3291 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3292 struct ppc_link_hash_entry *tls_get_addr;
3293 struct ppc_link_hash_entry *tls_get_addr_fd;
3294
3295 /* Statistics. */
3296 unsigned long stub_count[ppc_stub_plt_call];
3297
3298 /* Number of stubs against global syms. */
3299 unsigned long stub_globals;
3300
3301 /* Set if we should emit symbols for stubs. */
3302 unsigned int emit_stub_syms:1;
3303
3304 /* Support for multiple toc sections. */
3305 unsigned int no_multi_toc:1;
3306 unsigned int multi_toc_needed:1;
3307
3308 /* Set on error. */
3309 unsigned int stub_error:1;
3310
3311 /* Flag set when small branches are detected. Used to
3312 select suitable defaults for the stub group size. */
3313 unsigned int has_14bit_branch:1;
3314
3315 /* Temp used by ppc64_elf_check_directives. */
3316 unsigned int twiddled_syms:1;
3317
3318 /* Incremented every time we size stubs. */
3319 unsigned int stub_iteration;
3320
3321 /* Small local sym to section mapping cache. */
3322 struct sym_sec_cache sym_sec;
3323 };
3324
3325 /* Rename some of the generic section flags to better document how they
3326 are used here. */
3327 #define has_toc_reloc has_gp_reloc
3328 #define makes_toc_func_call need_finalize_relax
3329 #define call_check_in_progress reloc_done
3330
3331 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3332
3333 #define ppc_hash_table(p) \
3334 ((struct ppc_link_hash_table *) ((p)->hash))
3335
3336 #define ppc_stub_hash_lookup(table, string, create, copy) \
3337 ((struct ppc_stub_hash_entry *) \
3338 bfd_hash_lookup ((table), (string), (create), (copy)))
3339
3340 #define ppc_branch_hash_lookup(table, string, create, copy) \
3341 ((struct ppc_branch_hash_entry *) \
3342 bfd_hash_lookup ((table), (string), (create), (copy)))
3343
3344 /* Create an entry in the stub hash table. */
3345
3346 static struct bfd_hash_entry *
3347 stub_hash_newfunc (struct bfd_hash_entry *entry,
3348 struct bfd_hash_table *table,
3349 const char *string)
3350 {
3351 /* Allocate the structure if it has not already been allocated by a
3352 subclass. */
3353 if (entry == NULL)
3354 {
3355 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3356 if (entry == NULL)
3357 return entry;
3358 }
3359
3360 /* Call the allocation method of the superclass. */
3361 entry = bfd_hash_newfunc (entry, table, string);
3362 if (entry != NULL)
3363 {
3364 struct ppc_stub_hash_entry *eh;
3365
3366 /* Initialize the local fields. */
3367 eh = (struct ppc_stub_hash_entry *) entry;
3368 eh->stub_type = ppc_stub_none;
3369 eh->stub_sec = NULL;
3370 eh->stub_offset = 0;
3371 eh->target_value = 0;
3372 eh->target_section = NULL;
3373 eh->h = NULL;
3374 eh->id_sec = NULL;
3375 }
3376
3377 return entry;
3378 }
3379
3380 /* Create an entry in the branch hash table. */
3381
3382 static struct bfd_hash_entry *
3383 branch_hash_newfunc (struct bfd_hash_entry *entry,
3384 struct bfd_hash_table *table,
3385 const char *string)
3386 {
3387 /* Allocate the structure if it has not already been allocated by a
3388 subclass. */
3389 if (entry == NULL)
3390 {
3391 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3392 if (entry == NULL)
3393 return entry;
3394 }
3395
3396 /* Call the allocation method of the superclass. */
3397 entry = bfd_hash_newfunc (entry, table, string);
3398 if (entry != NULL)
3399 {
3400 struct ppc_branch_hash_entry *eh;
3401
3402 /* Initialize the local fields. */
3403 eh = (struct ppc_branch_hash_entry *) entry;
3404 eh->offset = 0;
3405 eh->iter = 0;
3406 }
3407
3408 return entry;
3409 }
3410
3411 /* Create an entry in a ppc64 ELF linker hash table. */
3412
3413 static struct bfd_hash_entry *
3414 link_hash_newfunc (struct bfd_hash_entry *entry,
3415 struct bfd_hash_table *table,
3416 const char *string)
3417 {
3418 /* Allocate the structure if it has not already been allocated by a
3419 subclass. */
3420 if (entry == NULL)
3421 {
3422 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3423 if (entry == NULL)
3424 return entry;
3425 }
3426
3427 /* Call the allocation method of the superclass. */
3428 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3429 if (entry != NULL)
3430 {
3431 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3432
3433 eh->stub_cache = NULL;
3434 eh->dyn_relocs = NULL;
3435 eh->oh = NULL;
3436 eh->is_func = 0;
3437 eh->is_func_descriptor = 0;
3438 eh->adjust_done = 0;
3439 eh->was_undefined = 0;
3440 eh->tls_mask = 0;
3441 }
3442
3443 return entry;
3444 }
3445
3446 /* Create a ppc64 ELF linker hash table. */
3447
3448 static struct bfd_link_hash_table *
3449 ppc64_elf_link_hash_table_create (bfd *abfd)
3450 {
3451 struct ppc_link_hash_table *htab;
3452 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3453
3454 htab = bfd_zmalloc (amt);
3455 if (htab == NULL)
3456 return NULL;
3457
3458 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3459 {
3460 free (htab);
3461 return NULL;
3462 }
3463
3464 /* Init the stub hash table too. */
3465 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3466 return NULL;
3467
3468 /* And the branch hash table. */
3469 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3470 return NULL;
3471
3472 /* Initializing two fields of the union is just cosmetic. We really
3473 only care about glist, but when compiled on a 32-bit host the
3474 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3475 debugger inspection of these fields look nicer. */
3476 htab->elf.init_refcount.refcount = 0;
3477 htab->elf.init_refcount.glist = NULL;
3478 htab->elf.init_offset.offset = 0;
3479 htab->elf.init_offset.glist = NULL;
3480
3481 return &htab->elf.root;
3482 }
3483
3484 /* Free the derived linker hash table. */
3485
3486 static void
3487 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3488 {
3489 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3490
3491 bfd_hash_table_free (&ret->stub_hash_table);
3492 bfd_hash_table_free (&ret->branch_hash_table);
3493 _bfd_generic_link_hash_table_free (hash);
3494 }
3495
3496 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3497
3498 void
3499 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3500 {
3501 struct ppc_link_hash_table *htab;
3502
3503 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3504
3505 /* Always hook our dynamic sections into the first bfd, which is the
3506 linker created stub bfd. This ensures that the GOT header is at
3507 the start of the output TOC section. */
3508 htab = ppc_hash_table (info);
3509 htab->stub_bfd = abfd;
3510 htab->elf.dynobj = abfd;
3511 }
3512
3513 /* Build a name for an entry in the stub hash table. */
3514
3515 static char *
3516 ppc_stub_name (const asection *input_section,
3517 const asection *sym_sec,
3518 const struct ppc_link_hash_entry *h,
3519 const Elf_Internal_Rela *rel)
3520 {
3521 char *stub_name;
3522 bfd_size_type len;
3523
3524 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3525 offsets from a sym as a branch target? In fact, we could
3526 probably assume the addend is always zero. */
3527 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3528
3529 if (h)
3530 {
3531 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3532 stub_name = bfd_malloc (len);
3533 if (stub_name != NULL)
3534 {
3535 sprintf (stub_name, "%08x.%s+%x",
3536 input_section->id & 0xffffffff,
3537 h->elf.root.root.string,
3538 (int) rel->r_addend & 0xffffffff);
3539 }
3540 }
3541 else
3542 {
3543 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3544 stub_name = bfd_malloc (len);
3545 if (stub_name != NULL)
3546 {
3547 sprintf (stub_name, "%08x.%x:%x+%x",
3548 input_section->id & 0xffffffff,
3549 sym_sec->id & 0xffffffff,
3550 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3551 (int) rel->r_addend & 0xffffffff);
3552 }
3553 }
3554 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3555 stub_name[len - 2] = 0;
3556 return stub_name;
3557 }
3558
3559 /* Look up an entry in the stub hash. Stub entries are cached because
3560 creating the stub name takes a bit of time. */
3561
3562 static struct ppc_stub_hash_entry *
3563 ppc_get_stub_entry (const asection *input_section,
3564 const asection *sym_sec,
3565 struct ppc_link_hash_entry *h,
3566 const Elf_Internal_Rela *rel,
3567 struct ppc_link_hash_table *htab)
3568 {
3569 struct ppc_stub_hash_entry *stub_entry;
3570 const asection *id_sec;
3571
3572 /* If this input section is part of a group of sections sharing one
3573 stub section, then use the id of the first section in the group.
3574 Stub names need to include a section id, as there may well be
3575 more than one stub used to reach say, printf, and we need to
3576 distinguish between them. */
3577 id_sec = htab->stub_group[input_section->id].link_sec;
3578
3579 if (h != NULL && h->stub_cache != NULL
3580 && h->stub_cache->h == h
3581 && h->stub_cache->id_sec == id_sec)
3582 {
3583 stub_entry = h->stub_cache;
3584 }
3585 else
3586 {
3587 char *stub_name;
3588
3589 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3590 if (stub_name == NULL)
3591 return NULL;
3592
3593 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3594 stub_name, FALSE, FALSE);
3595 if (h != NULL)
3596 h->stub_cache = stub_entry;
3597
3598 free (stub_name);
3599 }
3600
3601 return stub_entry;
3602 }
3603
3604 /* Add a new stub entry to the stub hash. Not all fields of the new
3605 stub entry are initialised. */
3606
3607 static struct ppc_stub_hash_entry *
3608 ppc_add_stub (const char *stub_name,
3609 asection *section,
3610 struct ppc_link_hash_table *htab)
3611 {
3612 asection *link_sec;
3613 asection *stub_sec;
3614 struct ppc_stub_hash_entry *stub_entry;
3615
3616 link_sec = htab->stub_group[section->id].link_sec;
3617 stub_sec = htab->stub_group[section->id].stub_sec;
3618 if (stub_sec == NULL)
3619 {
3620 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3621 if (stub_sec == NULL)
3622 {
3623 size_t namelen;
3624 bfd_size_type len;
3625 char *s_name;
3626
3627 namelen = strlen (link_sec->name);
3628 len = namelen + sizeof (STUB_SUFFIX);
3629 s_name = bfd_alloc (htab->stub_bfd, len);
3630 if (s_name == NULL)
3631 return NULL;
3632
3633 memcpy (s_name, link_sec->name, namelen);
3634 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3635 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3636 if (stub_sec == NULL)
3637 return NULL;
3638 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3639 }
3640 htab->stub_group[section->id].stub_sec = stub_sec;
3641 }
3642
3643 /* Enter this entry into the linker stub hash table. */
3644 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3645 TRUE, FALSE);
3646 if (stub_entry == NULL)
3647 {
3648 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3649 section->owner, stub_name);
3650 return NULL;
3651 }
3652
3653 stub_entry->stub_sec = stub_sec;
3654 stub_entry->stub_offset = 0;
3655 stub_entry->id_sec = link_sec;
3656 return stub_entry;
3657 }
3658
3659 /* Create sections for linker generated code. */
3660
3661 static bfd_boolean
3662 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3663 {
3664 struct ppc_link_hash_table *htab;
3665 flagword flags;
3666
3667 htab = ppc_hash_table (info);
3668
3669 /* Create .sfpr for code to save and restore fp regs. */
3670 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3671 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3672 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3673 if (htab->sfpr == NULL
3674 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3675 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3676 return FALSE;
3677
3678 /* Create .glink for lazy dynamic linking support. */
3679 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3680 if (htab->glink == NULL
3681 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3682 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3683 return FALSE;
3684
3685 /* Create .branch_lt for plt_branch stubs. */
3686 flags = (SEC_ALLOC | SEC_LOAD
3687 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3688 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3689 if (htab->brlt == NULL
3690 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3691 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3692 return FALSE;
3693
3694 if (info->shared || info->emitrelocations)
3695 {
3696 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3697 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3698 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3699 if (!htab->relbrlt
3700 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3701 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3702 return FALSE;
3703 }
3704 return TRUE;
3705 }
3706
3707 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3708 not already done. */
3709
3710 static bfd_boolean
3711 create_got_section (bfd *abfd, struct bfd_link_info *info)
3712 {
3713 asection *got, *relgot;
3714 flagword flags;
3715 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3716
3717 if (!htab->got)
3718 {
3719 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3720 return FALSE;
3721
3722 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3723 if (!htab->got)
3724 abort ();
3725 }
3726
3727 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3728 | SEC_LINKER_CREATED);
3729
3730 got = bfd_make_section (abfd, ".got");
3731 if (!got
3732 || !bfd_set_section_flags (abfd, got, flags)
3733 || !bfd_set_section_alignment (abfd, got, 3))
3734 return FALSE;
3735
3736 relgot = bfd_make_section (abfd, ".rela.got");
3737 if (!relgot
3738 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3739 || ! bfd_set_section_alignment (abfd, relgot, 3))
3740 return FALSE;
3741
3742 ppc64_elf_tdata (abfd)->got = got;
3743 ppc64_elf_tdata (abfd)->relgot = relgot;
3744 return TRUE;
3745 }
3746
3747 /* Create the dynamic sections, and set up shortcuts. */
3748
3749 static bfd_boolean
3750 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3751 {
3752 struct ppc_link_hash_table *htab;
3753
3754 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3755 return FALSE;
3756
3757 htab = ppc_hash_table (info);
3758 if (!htab->got)
3759 htab->got = bfd_get_section_by_name (dynobj, ".got");
3760 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3761 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3762 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3763 if (!info->shared)
3764 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3765
3766 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3767 || (!info->shared && !htab->relbss))
3768 abort ();
3769
3770 return TRUE;
3771 }
3772
3773 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3774
3775 static void
3776 ppc64_elf_copy_indirect_symbol
3777 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3778 struct elf_link_hash_entry *dir,
3779 struct elf_link_hash_entry *ind)
3780 {
3781 struct ppc_link_hash_entry *edir, *eind;
3782
3783 edir = (struct ppc_link_hash_entry *) dir;
3784 eind = (struct ppc_link_hash_entry *) ind;
3785
3786 /* Copy over any dynamic relocs we may have on the indirect sym. */
3787 if (eind->dyn_relocs != NULL)
3788 {
3789 if (edir->dyn_relocs != NULL)
3790 {
3791 struct ppc_dyn_relocs **pp;
3792 struct ppc_dyn_relocs *p;
3793
3794 if (eind->elf.root.type == bfd_link_hash_indirect)
3795 abort ();
3796
3797 /* Add reloc counts against the weak sym to the strong sym
3798 list. Merge any entries against the same section. */
3799 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3800 {
3801 struct ppc_dyn_relocs *q;
3802
3803 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3804 if (q->sec == p->sec)
3805 {
3806 q->pc_count += p->pc_count;
3807 q->count += p->count;
3808 *pp = p->next;
3809 break;
3810 }
3811 if (q == NULL)
3812 pp = &p->next;
3813 }
3814 *pp = edir->dyn_relocs;
3815 }
3816
3817 edir->dyn_relocs = eind->dyn_relocs;
3818 eind->dyn_relocs = NULL;
3819 }
3820
3821 edir->is_func |= eind->is_func;
3822 edir->is_func_descriptor |= eind->is_func_descriptor;
3823 edir->tls_mask |= eind->tls_mask;
3824
3825 /* If called to transfer flags for a weakdef during processing
3826 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3827 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3828 if (!(ELIMINATE_COPY_RELOCS
3829 && eind->elf.root.type != bfd_link_hash_indirect
3830 && edir->elf.dynamic_adjusted))
3831 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3832
3833 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3834 edir->elf.ref_regular |= eind->elf.ref_regular;
3835 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3836 edir->elf.needs_plt |= eind->elf.needs_plt;
3837
3838 /* If we were called to copy over info for a weak sym, that's all. */
3839 if (eind->elf.root.type != bfd_link_hash_indirect)
3840 return;
3841
3842 /* Copy over got entries that we may have already seen to the
3843 symbol which just became indirect. */
3844 if (eind->elf.got.glist != NULL)
3845 {
3846 if (edir->elf.got.glist != NULL)
3847 {
3848 struct got_entry **entp;
3849 struct got_entry *ent;
3850
3851 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3852 {
3853 struct got_entry *dent;
3854
3855 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3856 if (dent->addend == ent->addend
3857 && dent->owner == ent->owner
3858 && dent->tls_type == ent->tls_type)
3859 {
3860 dent->got.refcount += ent->got.refcount;
3861 *entp = ent->next;
3862 break;
3863 }
3864 if (dent == NULL)
3865 entp = &ent->next;
3866 }
3867 *entp = edir->elf.got.glist;
3868 }
3869
3870 edir->elf.got.glist = eind->elf.got.glist;
3871 eind->elf.got.glist = NULL;
3872 }
3873
3874 /* And plt entries. */
3875 if (eind->elf.plt.plist != NULL)
3876 {
3877 if (edir->elf.plt.plist != NULL)
3878 {
3879 struct plt_entry **entp;
3880 struct plt_entry *ent;
3881
3882 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3883 {
3884 struct plt_entry *dent;
3885
3886 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3887 if (dent->addend == ent->addend)
3888 {
3889 dent->plt.refcount += ent->plt.refcount;
3890 *entp = ent->next;
3891 break;
3892 }
3893 if (dent == NULL)
3894 entp = &ent->next;
3895 }
3896 *entp = edir->elf.plt.plist;
3897 }
3898
3899 edir->elf.plt.plist = eind->elf.plt.plist;
3900 eind->elf.plt.plist = NULL;
3901 }
3902
3903 if (edir->elf.dynindx == -1)
3904 {
3905 edir->elf.dynindx = eind->elf.dynindx;
3906 edir->elf.dynstr_index = eind->elf.dynstr_index;
3907 eind->elf.dynindx = -1;
3908 eind->elf.dynstr_index = 0;
3909 }
3910 else
3911 BFD_ASSERT (eind->elf.dynindx == -1);
3912 }
3913
3914 /* Find the function descriptor hash entry from the given function code
3915 hash entry FH. Link the entries via their OH fields. */
3916
3917 static struct ppc_link_hash_entry *
3918 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3919 {
3920 struct ppc_link_hash_entry *fdh = fh->oh;
3921
3922 if (fdh == NULL)
3923 {
3924 const char *fd_name = fh->elf.root.root.string + 1;
3925
3926 fdh = (struct ppc_link_hash_entry *)
3927 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3928 if (fdh != NULL)
3929 {
3930 fdh->is_func_descriptor = 1;
3931 fdh->oh = fh;
3932 fh->is_func = 1;
3933 fh->oh = fdh;
3934 }
3935 }
3936
3937 return fdh;
3938 }
3939
3940 /* Make a fake function descriptor sym for the code sym FH. */
3941
3942 static struct ppc_link_hash_entry *
3943 make_fdh (struct bfd_link_info *info,
3944 struct ppc_link_hash_entry *fh,
3945 flagword flags)
3946 {
3947 bfd *abfd;
3948 asymbol *newsym;
3949 struct bfd_link_hash_entry *bh;
3950 struct ppc_link_hash_entry *fdh;
3951
3952 abfd = fh->elf.root.u.undef.abfd;
3953 newsym = bfd_make_empty_symbol (abfd);
3954 newsym->name = fh->elf.root.root.string + 1;
3955 newsym->section = bfd_und_section_ptr;
3956 newsym->value = 0;
3957 newsym->flags = flags;
3958
3959 bh = NULL;
3960 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
3961 newsym->flags, newsym->section,
3962 newsym->value, NULL, FALSE, FALSE,
3963 &bh))
3964 return NULL;
3965
3966 fdh = (struct ppc_link_hash_entry *) bh;
3967 fdh->elf.non_elf = 0;
3968 return fdh;
3969 }
3970
3971 /* Hacks to support old ABI code.
3972 When making function calls, old ABI code references function entry
3973 points (dot symbols), while new ABI code references the function
3974 descriptor symbol. We need to make any combination of reference and
3975 definition work together, without breaking archive linking.
3976
3977 For a defined function "foo" and an undefined call to "bar":
3978 An old object defines "foo" and ".foo", references ".bar" (possibly
3979 "bar" too).
3980 A new object defines "foo" and references "bar".
3981
3982 A new object thus has no problem with its undefined symbols being
3983 satisfied by definitions in an old object. On the other hand, the
3984 old object won't have ".bar" satisfied by a new object. */
3985
3986 /* Fix function descriptor symbols defined in .opd sections to be
3987 function type. */
3988
3989 static bfd_boolean
3990 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
3991 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3992 Elf_Internal_Sym *isym,
3993 const char **name ATTRIBUTE_UNUSED,
3994 flagword *flags ATTRIBUTE_UNUSED,
3995 asection **sec,
3996 bfd_vma *value ATTRIBUTE_UNUSED)
3997 {
3998 if (*sec != NULL
3999 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4000 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4001 return TRUE;
4002 }
4003
4004 /* This function makes an old ABI object reference to ".bar" cause the
4005 inclusion of a new ABI object archive that defines "bar". */
4006
4007 static struct elf_link_hash_entry *
4008 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4009 struct bfd_link_info *info,
4010 const char *name)
4011 {
4012 struct elf_link_hash_entry *h;
4013 char *dot_name;
4014 size_t len;
4015
4016 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4017 if (h != NULL)
4018 return h;
4019
4020 if (name[0] == '.')
4021 return h;
4022
4023 len = strlen (name);
4024 dot_name = bfd_alloc (abfd, len + 2);
4025 if (dot_name == NULL)
4026 return (struct elf_link_hash_entry *) 0 - 1;
4027 dot_name[0] = '.';
4028 memcpy (dot_name + 1, name, len + 1);
4029 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4030 bfd_release (abfd, dot_name);
4031 return h;
4032 }
4033
4034 /* This function satisfies all old ABI object references to ".bar" if a
4035 new ABI object defines "bar". Well, at least, undefined dot symbols
4036 are made weak. This stops later archive searches from including an
4037 object if we already have a function descriptor definition. It also
4038 prevents the linker complaining about undefined symbols.
4039 We also check and correct mismatched symbol visibility here. The
4040 most restrictive visibility of the function descriptor and the
4041 function entry symbol is used. */
4042
4043 struct add_symbol_adjust_data
4044 {
4045 struct bfd_link_info *info;
4046 bfd_boolean ok;
4047 };
4048
4049 static bfd_boolean
4050 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4051 {
4052 struct add_symbol_adjust_data *data;
4053 struct ppc_link_hash_table *htab;
4054 struct ppc_link_hash_entry *eh;
4055 struct ppc_link_hash_entry *fdh;
4056
4057 if (h->root.type == bfd_link_hash_indirect)
4058 return TRUE;
4059
4060 if (h->root.type == bfd_link_hash_warning)
4061 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4062
4063 if (h->root.root.string[0] != '.')
4064 return TRUE;
4065
4066 data = inf;
4067 htab = ppc_hash_table (data->info);
4068 eh = (struct ppc_link_hash_entry *) h;
4069 fdh = get_fdh (eh, htab);
4070 if (fdh == NULL
4071 && (eh->elf.root.type == bfd_link_hash_undefined
4072 || eh->elf.root.type == bfd_link_hash_undefweak)
4073 && eh->elf.ref_regular)
4074 {
4075 /* Make an undefweak function descriptor sym, which is enough to
4076 pull in an --as-needed shared lib, but won't cause link
4077 errors. Archives are handled elsewhere. */
4078 fdh = make_fdh (data->info, eh, BSF_WEAK);
4079 if (fdh == NULL)
4080 data->ok = FALSE;
4081 else
4082 fdh->elf.ref_regular = 1;
4083 }
4084 else if (fdh != NULL)
4085 {
4086 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4087 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4088 if (entry_vis < descr_vis)
4089 fdh->elf.other += entry_vis - descr_vis;
4090 else if (entry_vis > descr_vis)
4091 eh->elf.other += descr_vis - entry_vis;
4092
4093 if (eh->elf.root.type == bfd_link_hash_undefined
4094 && (fdh->elf.root.type == bfd_link_hash_defined
4095 || fdh->elf.root.type == bfd_link_hash_defweak))
4096 {
4097 eh->elf.root.type = bfd_link_hash_undefweak;
4098 eh->was_undefined = 1;
4099 htab->twiddled_syms = 1;
4100 }
4101 }
4102
4103 return TRUE;
4104 }
4105
4106 static bfd_boolean
4107 ppc64_elf_check_directives (bfd *abfd ATTRIBUTE_UNUSED,
4108 struct bfd_link_info *info)
4109 {
4110 struct ppc_link_hash_table *htab;
4111 struct add_symbol_adjust_data data;
4112
4113 htab = ppc_hash_table (info);
4114 if (!is_ppc64_elf_target (htab->elf.root.creator))
4115 return TRUE;
4116
4117 data.info = info;
4118 data.ok = TRUE;
4119 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4120
4121 /* We need to fix the undefs list for any syms we have twiddled to
4122 undef_weak. */
4123 if (htab->twiddled_syms)
4124 {
4125 bfd_link_repair_undef_list (&htab->elf.root);
4126 htab->twiddled_syms = 0;
4127 }
4128 return data.ok;
4129 }
4130
4131 static bfd_boolean
4132 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4133 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4134 {
4135 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4136 char *local_got_tls_masks;
4137
4138 if (local_got_ents == NULL)
4139 {
4140 bfd_size_type size = symtab_hdr->sh_info;
4141
4142 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4143 local_got_ents = bfd_zalloc (abfd, size);
4144 if (local_got_ents == NULL)
4145 return FALSE;
4146 elf_local_got_ents (abfd) = local_got_ents;
4147 }
4148
4149 if ((tls_type & TLS_EXPLICIT) == 0)
4150 {
4151 struct got_entry *ent;
4152
4153 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4154 if (ent->addend == r_addend
4155 && ent->owner == abfd
4156 && ent->tls_type == tls_type)
4157 break;
4158 if (ent == NULL)
4159 {
4160 bfd_size_type amt = sizeof (*ent);
4161 ent = bfd_alloc (abfd, amt);
4162 if (ent == NULL)
4163 return FALSE;
4164 ent->next = local_got_ents[r_symndx];
4165 ent->addend = r_addend;
4166 ent->owner = abfd;
4167 ent->tls_type = tls_type;
4168 ent->got.refcount = 0;
4169 local_got_ents[r_symndx] = ent;
4170 }
4171 ent->got.refcount += 1;
4172 }
4173
4174 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4175 local_got_tls_masks[r_symndx] |= tls_type;
4176 return TRUE;
4177 }
4178
4179 static bfd_boolean
4180 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4181 {
4182 struct plt_entry *ent;
4183
4184 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4185 if (ent->addend == addend)
4186 break;
4187 if (ent == NULL)
4188 {
4189 bfd_size_type amt = sizeof (*ent);
4190 ent = bfd_alloc (abfd, amt);
4191 if (ent == NULL)
4192 return FALSE;
4193 ent->next = eh->elf.plt.plist;
4194 ent->addend = addend;
4195 ent->plt.refcount = 0;
4196 eh->elf.plt.plist = ent;
4197 }
4198 ent->plt.refcount += 1;
4199 eh->elf.needs_plt = 1;
4200 eh->is_func = 1;
4201 return TRUE;
4202 }
4203
4204 /* Look through the relocs for a section during the first phase, and
4205 calculate needed space in the global offset table, procedure
4206 linkage table, and dynamic reloc sections. */
4207
4208 static bfd_boolean
4209 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4210 asection *sec, const Elf_Internal_Rela *relocs)
4211 {
4212 struct ppc_link_hash_table *htab;
4213 Elf_Internal_Shdr *symtab_hdr;
4214 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4215 const Elf_Internal_Rela *rel;
4216 const Elf_Internal_Rela *rel_end;
4217 asection *sreloc;
4218 asection **opd_sym_map;
4219
4220 if (info->relocatable)
4221 return TRUE;
4222
4223 /* Don't do anything special with non-loaded, non-alloced sections.
4224 In particular, any relocs in such sections should not affect GOT
4225 and PLT reference counting (ie. we don't allow them to create GOT
4226 or PLT entries), there's no possibility or desire to optimize TLS
4227 relocs, and there's not much point in propagating relocs to shared
4228 libs that the dynamic linker won't relocate. */
4229 if ((sec->flags & SEC_ALLOC) == 0)
4230 return TRUE;
4231
4232 htab = ppc_hash_table (info);
4233 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4234
4235 sym_hashes = elf_sym_hashes (abfd);
4236 sym_hashes_end = (sym_hashes
4237 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4238 - symtab_hdr->sh_info);
4239
4240 sreloc = NULL;
4241 opd_sym_map = NULL;
4242 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4243 {
4244 /* Garbage collection needs some extra help with .opd sections.
4245 We don't want to necessarily keep everything referenced by
4246 relocs in .opd, as that would keep all functions. Instead,
4247 if we reference an .opd symbol (a function descriptor), we
4248 want to keep the function code symbol's section. This is
4249 easy for global symbols, but for local syms we need to keep
4250 information about the associated function section. Later, if
4251 edit_opd deletes entries, we'll use this array to adjust
4252 local syms in .opd. */
4253 union opd_info {
4254 asection *func_section;
4255 long entry_adjust;
4256 };
4257 bfd_size_type amt;
4258
4259 amt = sec->size * sizeof (union opd_info) / 8;
4260 opd_sym_map = bfd_zalloc (abfd, amt);
4261 if (opd_sym_map == NULL)
4262 return FALSE;
4263 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4264 }
4265
4266 if (htab->sfpr == NULL
4267 && !create_linkage_sections (htab->elf.dynobj, info))
4268 return FALSE;
4269
4270 rel_end = relocs + sec->reloc_count;
4271 for (rel = relocs; rel < rel_end; rel++)
4272 {
4273 unsigned long r_symndx;
4274 struct elf_link_hash_entry *h;
4275 enum elf_ppc64_reloc_type r_type;
4276 int tls_type = 0;
4277
4278 r_symndx = ELF64_R_SYM (rel->r_info);
4279 if (r_symndx < symtab_hdr->sh_info)
4280 h = NULL;
4281 else
4282 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4283
4284 r_type = ELF64_R_TYPE (rel->r_info);
4285 switch (r_type)
4286 {
4287 case R_PPC64_GOT_TLSLD16:
4288 case R_PPC64_GOT_TLSLD16_LO:
4289 case R_PPC64_GOT_TLSLD16_HI:
4290 case R_PPC64_GOT_TLSLD16_HA:
4291 ppc64_tlsld_got (abfd)->refcount += 1;
4292 tls_type = TLS_TLS | TLS_LD;
4293 goto dogottls;
4294
4295 case R_PPC64_GOT_TLSGD16:
4296 case R_PPC64_GOT_TLSGD16_LO:
4297 case R_PPC64_GOT_TLSGD16_HI:
4298 case R_PPC64_GOT_TLSGD16_HA:
4299 tls_type = TLS_TLS | TLS_GD;
4300 goto dogottls;
4301
4302 case R_PPC64_GOT_TPREL16_DS:
4303 case R_PPC64_GOT_TPREL16_LO_DS:
4304 case R_PPC64_GOT_TPREL16_HI:
4305 case R_PPC64_GOT_TPREL16_HA:
4306 if (info->shared)
4307 info->flags |= DF_STATIC_TLS;
4308 tls_type = TLS_TLS | TLS_TPREL;
4309 goto dogottls;
4310
4311 case R_PPC64_GOT_DTPREL16_DS:
4312 case R_PPC64_GOT_DTPREL16_LO_DS:
4313 case R_PPC64_GOT_DTPREL16_HI:
4314 case R_PPC64_GOT_DTPREL16_HA:
4315 tls_type = TLS_TLS | TLS_DTPREL;
4316 dogottls:
4317 sec->has_tls_reloc = 1;
4318 /* Fall thru */
4319
4320 case R_PPC64_GOT16:
4321 case R_PPC64_GOT16_DS:
4322 case R_PPC64_GOT16_HA:
4323 case R_PPC64_GOT16_HI:
4324 case R_PPC64_GOT16_LO:
4325 case R_PPC64_GOT16_LO_DS:
4326 /* This symbol requires a global offset table entry. */
4327 sec->has_toc_reloc = 1;
4328 if (ppc64_elf_tdata (abfd)->got == NULL
4329 && !create_got_section (abfd, info))
4330 return FALSE;
4331
4332 if (h != NULL)
4333 {
4334 struct ppc_link_hash_entry *eh;
4335 struct got_entry *ent;
4336
4337 eh = (struct ppc_link_hash_entry *) h;
4338 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4339 if (ent->addend == rel->r_addend
4340 && ent->owner == abfd
4341 && ent->tls_type == tls_type)
4342 break;
4343 if (ent == NULL)
4344 {
4345 bfd_size_type amt = sizeof (*ent);
4346 ent = bfd_alloc (abfd, amt);
4347 if (ent == NULL)
4348 return FALSE;
4349 ent->next = eh->elf.got.glist;
4350 ent->addend = rel->r_addend;
4351 ent->owner = abfd;
4352 ent->tls_type = tls_type;
4353 ent->got.refcount = 0;
4354 eh->elf.got.glist = ent;
4355 }
4356 ent->got.refcount += 1;
4357 eh->tls_mask |= tls_type;
4358 }
4359 else
4360 /* This is a global offset table entry for a local symbol. */
4361 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4362 rel->r_addend, tls_type))
4363 return FALSE;
4364 break;
4365
4366 case R_PPC64_PLT16_HA:
4367 case R_PPC64_PLT16_HI:
4368 case R_PPC64_PLT16_LO:
4369 case R_PPC64_PLT32:
4370 case R_PPC64_PLT64:
4371 /* This symbol requires a procedure linkage table entry. We
4372 actually build the entry in adjust_dynamic_symbol,
4373 because this might be a case of linking PIC code without
4374 linking in any dynamic objects, in which case we don't
4375 need to generate a procedure linkage table after all. */
4376 if (h == NULL)
4377 {
4378 /* It does not make sense to have a procedure linkage
4379 table entry for a local symbol. */
4380 bfd_set_error (bfd_error_bad_value);
4381 return FALSE;
4382 }
4383 else
4384 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4385 rel->r_addend))
4386 return FALSE;
4387 break;
4388
4389 /* The following relocations don't need to propagate the
4390 relocation if linking a shared object since they are
4391 section relative. */
4392 case R_PPC64_SECTOFF:
4393 case R_PPC64_SECTOFF_LO:
4394 case R_PPC64_SECTOFF_HI:
4395 case R_PPC64_SECTOFF_HA:
4396 case R_PPC64_SECTOFF_DS:
4397 case R_PPC64_SECTOFF_LO_DS:
4398 case R_PPC64_DTPREL16:
4399 case R_PPC64_DTPREL16_LO:
4400 case R_PPC64_DTPREL16_HI:
4401 case R_PPC64_DTPREL16_HA:
4402 case R_PPC64_DTPREL16_DS:
4403 case R_PPC64_DTPREL16_LO_DS:
4404 case R_PPC64_DTPREL16_HIGHER:
4405 case R_PPC64_DTPREL16_HIGHERA:
4406 case R_PPC64_DTPREL16_HIGHEST:
4407 case R_PPC64_DTPREL16_HIGHESTA:
4408 break;
4409
4410 /* Nor do these. */
4411 case R_PPC64_TOC16:
4412 case R_PPC64_TOC16_LO:
4413 case R_PPC64_TOC16_HI:
4414 case R_PPC64_TOC16_HA:
4415 case R_PPC64_TOC16_DS:
4416 case R_PPC64_TOC16_LO_DS:
4417 sec->has_toc_reloc = 1;
4418 break;
4419
4420 /* This relocation describes the C++ object vtable hierarchy.
4421 Reconstruct it for later use during GC. */
4422 case R_PPC64_GNU_VTINHERIT:
4423 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4424 return FALSE;
4425 break;
4426
4427 /* This relocation describes which C++ vtable entries are actually
4428 used. Record for later use during GC. */
4429 case R_PPC64_GNU_VTENTRY:
4430 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4431 return FALSE;
4432 break;
4433
4434 case R_PPC64_REL14:
4435 case R_PPC64_REL14_BRTAKEN:
4436 case R_PPC64_REL14_BRNTAKEN:
4437 htab->has_14bit_branch = 1;
4438 /* Fall through. */
4439
4440 case R_PPC64_REL24:
4441 if (h != NULL)
4442 {
4443 /* We may need a .plt entry if the function this reloc
4444 refers to is in a shared lib. */
4445 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4446 rel->r_addend))
4447 return FALSE;
4448 if (h == &htab->tls_get_addr->elf
4449 || h == &htab->tls_get_addr_fd->elf)
4450 sec->has_tls_reloc = 1;
4451 else if (htab->tls_get_addr == NULL
4452 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4453 && (h->root.root.string[15] == 0
4454 || h->root.root.string[15] == '@'))
4455 {
4456 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4457 sec->has_tls_reloc = 1;
4458 }
4459 else if (htab->tls_get_addr_fd == NULL
4460 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4461 && (h->root.root.string[14] == 0
4462 || h->root.root.string[14] == '@'))
4463 {
4464 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4465 sec->has_tls_reloc = 1;
4466 }
4467 }
4468 break;
4469
4470 case R_PPC64_TPREL64:
4471 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4472 if (info->shared)
4473 info->flags |= DF_STATIC_TLS;
4474 goto dotlstoc;
4475
4476 case R_PPC64_DTPMOD64:
4477 if (rel + 1 < rel_end
4478 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4479 && rel[1].r_offset == rel->r_offset + 8)
4480 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4481 else
4482 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4483 goto dotlstoc;
4484
4485 case R_PPC64_DTPREL64:
4486 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4487 if (rel != relocs
4488 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4489 && rel[-1].r_offset == rel->r_offset - 8)
4490 /* This is the second reloc of a dtpmod, dtprel pair.
4491 Don't mark with TLS_DTPREL. */
4492 goto dodyn;
4493
4494 dotlstoc:
4495 sec->has_tls_reloc = 1;
4496 if (h != NULL)
4497 {
4498 struct ppc_link_hash_entry *eh;
4499 eh = (struct ppc_link_hash_entry *) h;
4500 eh->tls_mask |= tls_type;
4501 }
4502 else
4503 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4504 rel->r_addend, tls_type))
4505 return FALSE;
4506
4507 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4508 {
4509 /* One extra to simplify get_tls_mask. */
4510 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4511 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4512 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4513 return FALSE;
4514 }
4515 BFD_ASSERT (rel->r_offset % 8 == 0);
4516 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4517
4518 /* Mark the second slot of a GD or LD entry.
4519 -1 to indicate GD and -2 to indicate LD. */
4520 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4521 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4522 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4523 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4524 goto dodyn;
4525
4526 case R_PPC64_TPREL16:
4527 case R_PPC64_TPREL16_LO:
4528 case R_PPC64_TPREL16_HI:
4529 case R_PPC64_TPREL16_HA:
4530 case R_PPC64_TPREL16_DS:
4531 case R_PPC64_TPREL16_LO_DS:
4532 case R_PPC64_TPREL16_HIGHER:
4533 case R_PPC64_TPREL16_HIGHERA:
4534 case R_PPC64_TPREL16_HIGHEST:
4535 case R_PPC64_TPREL16_HIGHESTA:
4536 if (info->shared)
4537 {
4538 info->flags |= DF_STATIC_TLS;
4539 goto dodyn;
4540 }
4541 break;
4542
4543 case R_PPC64_ADDR64:
4544 if (opd_sym_map != NULL
4545 && rel + 1 < rel_end
4546 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4547 {
4548 if (h != NULL)
4549 {
4550 if (h->root.root.string[0] == '.'
4551 && h->root.root.string[1] != 0
4552 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4553 ;
4554 else
4555 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4556 }
4557 else
4558 {
4559 asection *s;
4560
4561 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4562 r_symndx);
4563 if (s == NULL)
4564 return FALSE;
4565 else if (s != sec)
4566 opd_sym_map[rel->r_offset / 8] = s;
4567 }
4568 }
4569 /* Fall through. */
4570
4571 case R_PPC64_REL30:
4572 case R_PPC64_REL32:
4573 case R_PPC64_REL64:
4574 case R_PPC64_ADDR14:
4575 case R_PPC64_ADDR14_BRNTAKEN:
4576 case R_PPC64_ADDR14_BRTAKEN:
4577 case R_PPC64_ADDR16:
4578 case R_PPC64_ADDR16_DS:
4579 case R_PPC64_ADDR16_HA:
4580 case R_PPC64_ADDR16_HI:
4581 case R_PPC64_ADDR16_HIGHER:
4582 case R_PPC64_ADDR16_HIGHERA:
4583 case R_PPC64_ADDR16_HIGHEST:
4584 case R_PPC64_ADDR16_HIGHESTA:
4585 case R_PPC64_ADDR16_LO:
4586 case R_PPC64_ADDR16_LO_DS:
4587 case R_PPC64_ADDR24:
4588 case R_PPC64_ADDR32:
4589 case R_PPC64_UADDR16:
4590 case R_PPC64_UADDR32:
4591 case R_PPC64_UADDR64:
4592 case R_PPC64_TOC:
4593 if (h != NULL && !info->shared)
4594 /* We may need a copy reloc. */
4595 h->non_got_ref = 1;
4596
4597 /* Don't propagate .opd relocs. */
4598 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4599 break;
4600
4601 /* If we are creating a shared library, and this is a reloc
4602 against a global symbol, or a non PC relative reloc
4603 against a local symbol, then we need to copy the reloc
4604 into the shared library. However, if we are linking with
4605 -Bsymbolic, we do not need to copy a reloc against a
4606 global symbol which is defined in an object we are
4607 including in the link (i.e., DEF_REGULAR is set). At
4608 this point we have not seen all the input files, so it is
4609 possible that DEF_REGULAR is not set now but will be set
4610 later (it is never cleared). In case of a weak definition,
4611 DEF_REGULAR may be cleared later by a strong definition in
4612 a shared library. We account for that possibility below by
4613 storing information in the dyn_relocs field of the hash
4614 table entry. A similar situation occurs when creating
4615 shared libraries and symbol visibility changes render the
4616 symbol local.
4617
4618 If on the other hand, we are creating an executable, we
4619 may need to keep relocations for symbols satisfied by a
4620 dynamic library if we manage to avoid copy relocs for the
4621 symbol. */
4622 dodyn:
4623 if ((info->shared
4624 && (MUST_BE_DYN_RELOC (r_type)
4625 || (h != NULL
4626 && (! info->symbolic
4627 || h->root.type == bfd_link_hash_defweak
4628 || !h->def_regular))))
4629 || (ELIMINATE_COPY_RELOCS
4630 && !info->shared
4631 && h != NULL
4632 && (h->root.type == bfd_link_hash_defweak
4633 || !h->def_regular)))
4634 {
4635 struct ppc_dyn_relocs *p;
4636 struct ppc_dyn_relocs **head;
4637
4638 /* We must copy these reloc types into the output file.
4639 Create a reloc section in dynobj and make room for
4640 this reloc. */
4641 if (sreloc == NULL)
4642 {
4643 const char *name;
4644 bfd *dynobj;
4645
4646 name = (bfd_elf_string_from_elf_section
4647 (abfd,
4648 elf_elfheader (abfd)->e_shstrndx,
4649 elf_section_data (sec)->rel_hdr.sh_name));
4650 if (name == NULL)
4651 return FALSE;
4652
4653 if (strncmp (name, ".rela", 5) != 0
4654 || strcmp (bfd_get_section_name (abfd, sec),
4655 name + 5) != 0)
4656 {
4657 (*_bfd_error_handler)
4658 (_("%B: bad relocation section name `%s\'"),
4659 abfd, name);
4660 bfd_set_error (bfd_error_bad_value);
4661 }
4662
4663 dynobj = htab->elf.dynobj;
4664 sreloc = bfd_get_section_by_name (dynobj, name);
4665 if (sreloc == NULL)
4666 {
4667 flagword flags;
4668
4669 sreloc = bfd_make_section (dynobj, name);
4670 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4671 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4672 if ((sec->flags & SEC_ALLOC) != 0)
4673 flags |= SEC_ALLOC | SEC_LOAD;
4674 if (sreloc == NULL
4675 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4676 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4677 return FALSE;
4678 }
4679 elf_section_data (sec)->sreloc = sreloc;
4680 }
4681
4682 /* If this is a global symbol, we count the number of
4683 relocations we need for this symbol. */
4684 if (h != NULL)
4685 {
4686 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4687 }
4688 else
4689 {
4690 /* Track dynamic relocs needed for local syms too.
4691 We really need local syms available to do this
4692 easily. Oh well. */
4693
4694 asection *s;
4695 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4696 sec, r_symndx);
4697 if (s == NULL)
4698 return FALSE;
4699
4700 head = ((struct ppc_dyn_relocs **)
4701 &elf_section_data (s)->local_dynrel);
4702 }
4703
4704 p = *head;
4705 if (p == NULL || p->sec != sec)
4706 {
4707 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4708 if (p == NULL)
4709 return FALSE;
4710 p->next = *head;
4711 *head = p;
4712 p->sec = sec;
4713 p->count = 0;
4714 p->pc_count = 0;
4715 }
4716
4717 p->count += 1;
4718 if (!MUST_BE_DYN_RELOC (r_type))
4719 p->pc_count += 1;
4720 }
4721 break;
4722
4723 default:
4724 break;
4725 }
4726 }
4727
4728 return TRUE;
4729 }
4730
4731 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4732 of the code entry point, and its section. */
4733
4734 static bfd_vma
4735 opd_entry_value (asection *opd_sec,
4736 bfd_vma offset,
4737 asection **code_sec,
4738 bfd_vma *code_off)
4739 {
4740 bfd *opd_bfd = opd_sec->owner;
4741 Elf_Internal_Rela *relocs;
4742 Elf_Internal_Rela *lo, *hi, *look;
4743 bfd_vma val;
4744
4745 /* No relocs implies we are linking a --just-symbols object. */
4746 if (opd_sec->reloc_count == 0)
4747 {
4748 bfd_vma val;
4749
4750 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4751 return (bfd_vma) -1;
4752
4753 if (code_sec != NULL)
4754 {
4755 asection *sec, *likely = NULL;
4756 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4757 if (sec->vma <= val
4758 && (sec->flags & SEC_LOAD) != 0
4759 && (sec->flags & SEC_ALLOC) != 0)
4760 likely = sec;
4761 if (likely != NULL)
4762 {
4763 *code_sec = likely;
4764 if (code_off != NULL)
4765 *code_off = val - likely->vma;
4766 }
4767 }
4768 return val;
4769 }
4770
4771 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4772 if (relocs == NULL)
4773 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4774
4775 /* Go find the opd reloc at the sym address. */
4776 lo = relocs;
4777 BFD_ASSERT (lo != NULL);
4778 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4779 val = (bfd_vma) -1;
4780 while (lo < hi)
4781 {
4782 look = lo + (hi - lo) / 2;
4783 if (look->r_offset < offset)
4784 lo = look + 1;
4785 else if (look->r_offset > offset)
4786 hi = look;
4787 else
4788 {
4789 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4790 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4791 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4792 {
4793 unsigned long symndx = ELF64_R_SYM (look->r_info);
4794 asection *sec;
4795
4796 if (symndx < symtab_hdr->sh_info)
4797 {
4798 Elf_Internal_Sym *sym;
4799
4800 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4801 if (sym == NULL)
4802 {
4803 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4804 symtab_hdr->sh_info,
4805 0, NULL, NULL, NULL);
4806 if (sym == NULL)
4807 break;
4808 symtab_hdr->contents = (bfd_byte *) sym;
4809 }
4810
4811 sym += symndx;
4812 val = sym->st_value;
4813 sec = NULL;
4814 if ((sym->st_shndx != SHN_UNDEF
4815 && sym->st_shndx < SHN_LORESERVE)
4816 || sym->st_shndx > SHN_HIRESERVE)
4817 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4818 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4819 }
4820 else
4821 {
4822 struct elf_link_hash_entry **sym_hashes;
4823 struct elf_link_hash_entry *rh;
4824
4825 sym_hashes = elf_sym_hashes (opd_bfd);
4826 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4827 while (rh->root.type == bfd_link_hash_indirect
4828 || rh->root.type == bfd_link_hash_warning)
4829 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4830 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4831 || rh->root.type == bfd_link_hash_defweak);
4832 val = rh->root.u.def.value;
4833 sec = rh->root.u.def.section;
4834 }
4835 val += look->r_addend;
4836 if (code_off != NULL)
4837 *code_off = val;
4838 if (code_sec != NULL)
4839 *code_sec = sec;
4840 if (sec != NULL && sec->output_section != NULL)
4841 val += sec->output_section->vma + sec->output_offset;
4842 }
4843 break;
4844 }
4845 }
4846
4847 return val;
4848 }
4849
4850 /* Return the section that should be marked against GC for a given
4851 relocation. */
4852
4853 static asection *
4854 ppc64_elf_gc_mark_hook (asection *sec,
4855 struct bfd_link_info *info,
4856 Elf_Internal_Rela *rel,
4857 struct elf_link_hash_entry *h,
4858 Elf_Internal_Sym *sym)
4859 {
4860 asection *rsec;
4861
4862 /* First mark all our entry sym sections. */
4863 if (info->gc_sym_list != NULL)
4864 {
4865 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4866 struct bfd_sym_chain *sym = info->gc_sym_list;
4867
4868 info->gc_sym_list = NULL;
4869 do
4870 {
4871 struct ppc_link_hash_entry *eh;
4872
4873 eh = (struct ppc_link_hash_entry *)
4874 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4875 if (eh == NULL)
4876 continue;
4877 if (eh->elf.root.type != bfd_link_hash_defined
4878 && eh->elf.root.type != bfd_link_hash_defweak)
4879 continue;
4880
4881 if (eh->is_func_descriptor)
4882 rsec = eh->oh->elf.root.u.def.section;
4883 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4884 && opd_entry_value (eh->elf.root.u.def.section,
4885 eh->elf.root.u.def.value,
4886 &rsec, NULL) != (bfd_vma) -1)
4887 ;
4888 else
4889 continue;
4890
4891 if (!rsec->gc_mark)
4892 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4893
4894 rsec = eh->elf.root.u.def.section;
4895 if (!rsec->gc_mark)
4896 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4897
4898 sym = sym->next;
4899 }
4900 while (sym != NULL);
4901 }
4902
4903 /* Syms return NULL if we're marking .opd, so we avoid marking all
4904 function sections, as all functions are referenced in .opd. */
4905 rsec = NULL;
4906 if (get_opd_info (sec) != NULL)
4907 return rsec;
4908
4909 if (h != NULL)
4910 {
4911 enum elf_ppc64_reloc_type r_type;
4912 struct ppc_link_hash_entry *eh;
4913
4914 r_type = ELF64_R_TYPE (rel->r_info);
4915 switch (r_type)
4916 {
4917 case R_PPC64_GNU_VTINHERIT:
4918 case R_PPC64_GNU_VTENTRY:
4919 break;
4920
4921 default:
4922 switch (h->root.type)
4923 {
4924 case bfd_link_hash_defined:
4925 case bfd_link_hash_defweak:
4926 eh = (struct ppc_link_hash_entry *) h;
4927 if (eh->oh != NULL && eh->oh->is_func_descriptor)
4928 eh = eh->oh;
4929
4930 /* Function descriptor syms cause the associated
4931 function code sym section to be marked. */
4932 if (eh->is_func_descriptor)
4933 {
4934 /* They also mark their opd section. */
4935 if (!eh->elf.root.u.def.section->gc_mark)
4936 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4937 ppc64_elf_gc_mark_hook);
4938
4939 rsec = eh->oh->elf.root.u.def.section;
4940 }
4941 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4942 && opd_entry_value (eh->elf.root.u.def.section,
4943 eh->elf.root.u.def.value,
4944 &rsec, NULL) != (bfd_vma) -1)
4945 {
4946 if (!eh->elf.root.u.def.section->gc_mark)
4947 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4948 ppc64_elf_gc_mark_hook);
4949 }
4950 else
4951 rsec = h->root.u.def.section;
4952 break;
4953
4954 case bfd_link_hash_common:
4955 rsec = h->root.u.c.p->section;
4956 break;
4957
4958 default:
4959 break;
4960 }
4961 }
4962 }
4963 else
4964 {
4965 asection **opd_sym_section;
4966
4967 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4968 opd_sym_section = get_opd_info (rsec);
4969 if (opd_sym_section != NULL)
4970 {
4971 if (!rsec->gc_mark)
4972 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4973
4974 rsec = opd_sym_section[sym->st_value / 8];
4975 }
4976 }
4977
4978 return rsec;
4979 }
4980
4981 /* Update the .got, .plt. and dynamic reloc reference counts for the
4982 section being removed. */
4983
4984 static bfd_boolean
4985 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4986 asection *sec, const Elf_Internal_Rela *relocs)
4987 {
4988 struct ppc_link_hash_table *htab;
4989 Elf_Internal_Shdr *symtab_hdr;
4990 struct elf_link_hash_entry **sym_hashes;
4991 struct got_entry **local_got_ents;
4992 const Elf_Internal_Rela *rel, *relend;
4993
4994 if ((sec->flags & SEC_ALLOC) == 0)
4995 return TRUE;
4996
4997 elf_section_data (sec)->local_dynrel = NULL;
4998
4999 htab = ppc_hash_table (info);
5000 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5001 sym_hashes = elf_sym_hashes (abfd);
5002 local_got_ents = elf_local_got_ents (abfd);
5003
5004 relend = relocs + sec->reloc_count;
5005 for (rel = relocs; rel < relend; rel++)
5006 {
5007 unsigned long r_symndx;
5008 enum elf_ppc64_reloc_type r_type;
5009 struct elf_link_hash_entry *h = NULL;
5010 char tls_type = 0;
5011
5012 r_symndx = ELF64_R_SYM (rel->r_info);
5013 r_type = ELF64_R_TYPE (rel->r_info);
5014 if (r_symndx >= symtab_hdr->sh_info)
5015 {
5016 struct ppc_link_hash_entry *eh;
5017 struct ppc_dyn_relocs **pp;
5018 struct ppc_dyn_relocs *p;
5019
5020 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5021 while (h->root.type == bfd_link_hash_indirect
5022 || h->root.type == bfd_link_hash_warning)
5023 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5024 eh = (struct ppc_link_hash_entry *) h;
5025
5026 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5027 if (p->sec == sec)
5028 {
5029 /* Everything must go for SEC. */
5030 *pp = p->next;
5031 break;
5032 }
5033 }
5034
5035 switch (r_type)
5036 {
5037 case R_PPC64_GOT_TLSLD16:
5038 case R_PPC64_GOT_TLSLD16_LO:
5039 case R_PPC64_GOT_TLSLD16_HI:
5040 case R_PPC64_GOT_TLSLD16_HA:
5041 ppc64_tlsld_got (abfd)->refcount -= 1;
5042 tls_type = TLS_TLS | TLS_LD;
5043 goto dogot;
5044
5045 case R_PPC64_GOT_TLSGD16:
5046 case R_PPC64_GOT_TLSGD16_LO:
5047 case R_PPC64_GOT_TLSGD16_HI:
5048 case R_PPC64_GOT_TLSGD16_HA:
5049 tls_type = TLS_TLS | TLS_GD;
5050 goto dogot;
5051
5052 case R_PPC64_GOT_TPREL16_DS:
5053 case R_PPC64_GOT_TPREL16_LO_DS:
5054 case R_PPC64_GOT_TPREL16_HI:
5055 case R_PPC64_GOT_TPREL16_HA:
5056 tls_type = TLS_TLS | TLS_TPREL;
5057 goto dogot;
5058
5059 case R_PPC64_GOT_DTPREL16_DS:
5060 case R_PPC64_GOT_DTPREL16_LO_DS:
5061 case R_PPC64_GOT_DTPREL16_HI:
5062 case R_PPC64_GOT_DTPREL16_HA:
5063 tls_type = TLS_TLS | TLS_DTPREL;
5064 goto dogot;
5065
5066 case R_PPC64_GOT16:
5067 case R_PPC64_GOT16_DS:
5068 case R_PPC64_GOT16_HA:
5069 case R_PPC64_GOT16_HI:
5070 case R_PPC64_GOT16_LO:
5071 case R_PPC64_GOT16_LO_DS:
5072 dogot:
5073 {
5074 struct got_entry *ent;
5075
5076 if (h != NULL)
5077 ent = h->got.glist;
5078 else
5079 ent = local_got_ents[r_symndx];
5080
5081 for (; ent != NULL; ent = ent->next)
5082 if (ent->addend == rel->r_addend
5083 && ent->owner == abfd
5084 && ent->tls_type == tls_type)
5085 break;
5086 if (ent == NULL)
5087 abort ();
5088 if (ent->got.refcount > 0)
5089 ent->got.refcount -= 1;
5090 }
5091 break;
5092
5093 case R_PPC64_PLT16_HA:
5094 case R_PPC64_PLT16_HI:
5095 case R_PPC64_PLT16_LO:
5096 case R_PPC64_PLT32:
5097 case R_PPC64_PLT64:
5098 case R_PPC64_REL14:
5099 case R_PPC64_REL14_BRNTAKEN:
5100 case R_PPC64_REL14_BRTAKEN:
5101 case R_PPC64_REL24:
5102 if (h != NULL)
5103 {
5104 struct plt_entry *ent;
5105
5106 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5107 if (ent->addend == rel->r_addend)
5108 break;
5109 if (ent == NULL)
5110 abort ();
5111 if (ent->plt.refcount > 0)
5112 ent->plt.refcount -= 1;
5113 }
5114 break;
5115
5116 default:
5117 break;
5118 }
5119 }
5120 return TRUE;
5121 }
5122
5123 /* The maximum size of .sfpr. */
5124 #define SFPR_MAX (218*4)
5125
5126 struct sfpr_def_parms
5127 {
5128 const char name[12];
5129 unsigned char lo, hi;
5130 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5131 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5132 };
5133
5134 /* Auto-generate _save*, _rest* functions in .sfpr. */
5135
5136 static unsigned int
5137 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5138 {
5139 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5140 unsigned int i;
5141 size_t len = strlen (parm->name);
5142 bfd_boolean writing = FALSE;
5143 char sym[16];
5144
5145 memcpy (sym, parm->name, len);
5146 sym[len + 2] = 0;
5147
5148 for (i = parm->lo; i <= parm->hi; i++)
5149 {
5150 struct elf_link_hash_entry *h;
5151
5152 sym[len + 0] = i / 10 + '0';
5153 sym[len + 1] = i % 10 + '0';
5154 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5155 if (h != NULL
5156 && !h->def_regular)
5157 {
5158 h->root.type = bfd_link_hash_defined;
5159 h->root.u.def.section = htab->sfpr;
5160 h->root.u.def.value = htab->sfpr->size;
5161 h->type = STT_FUNC;
5162 h->def_regular = 1;
5163 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5164 writing = TRUE;
5165 if (htab->sfpr->contents == NULL)
5166 {
5167 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5168 if (htab->sfpr->contents == NULL)
5169 return FALSE;
5170 }
5171 }
5172 if (writing)
5173 {
5174 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5175 if (i != parm->hi)
5176 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5177 else
5178 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5179 htab->sfpr->size = p - htab->sfpr->contents;
5180 }
5181 }
5182
5183 return TRUE;
5184 }
5185
5186 static bfd_byte *
5187 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5188 {
5189 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5190 return p + 4;
5191 }
5192
5193 static bfd_byte *
5194 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5195 {
5196 p = savegpr0 (abfd, p, r);
5197 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5198 p = p + 4;
5199 bfd_put_32 (abfd, BLR, p);
5200 return p + 4;
5201 }
5202
5203 static bfd_byte *
5204 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5205 {
5206 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5207 return p + 4;
5208 }
5209
5210 static bfd_byte *
5211 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5212 {
5213 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5214 p = p + 4;
5215 p = restgpr0 (abfd, p, r);
5216 bfd_put_32 (abfd, MTLR_R0, p);
5217 p = p + 4;
5218 if (r == 29)
5219 {
5220 p = restgpr0 (abfd, p, 30);
5221 p = restgpr0 (abfd, p, 31);
5222 }
5223 bfd_put_32 (abfd, BLR, p);
5224 return p + 4;
5225 }
5226
5227 static bfd_byte *
5228 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5229 {
5230 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5231 return p + 4;
5232 }
5233
5234 static bfd_byte *
5235 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5236 {
5237 p = savegpr1 (abfd, p, r);
5238 bfd_put_32 (abfd, BLR, p);
5239 return p + 4;
5240 }
5241
5242 static bfd_byte *
5243 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5244 {
5245 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5246 return p + 4;
5247 }
5248
5249 static bfd_byte *
5250 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5251 {
5252 p = restgpr1 (abfd, p, r);
5253 bfd_put_32 (abfd, BLR, p);
5254 return p + 4;
5255 }
5256
5257 static bfd_byte *
5258 savefpr (bfd *abfd, bfd_byte *p, int r)
5259 {
5260 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5261 return p + 4;
5262 }
5263
5264 static bfd_byte *
5265 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5266 {
5267 p = savefpr (abfd, p, r);
5268 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5269 p = p + 4;
5270 bfd_put_32 (abfd, BLR, p);
5271 return p + 4;
5272 }
5273
5274 static bfd_byte *
5275 restfpr (bfd *abfd, bfd_byte *p, int r)
5276 {
5277 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5278 return p + 4;
5279 }
5280
5281 static bfd_byte *
5282 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5283 {
5284 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5285 p = p + 4;
5286 p = restfpr (abfd, p, r);
5287 bfd_put_32 (abfd, MTLR_R0, p);
5288 p = p + 4;
5289 if (r == 29)
5290 {
5291 p = restfpr (abfd, p, 30);
5292 p = restfpr (abfd, p, 31);
5293 }
5294 bfd_put_32 (abfd, BLR, p);
5295 return p + 4;
5296 }
5297
5298 static bfd_byte *
5299 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5300 {
5301 p = savefpr (abfd, p, r);
5302 bfd_put_32 (abfd, BLR, p);
5303 return p + 4;
5304 }
5305
5306 static bfd_byte *
5307 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5308 {
5309 p = restfpr (abfd, p, r);
5310 bfd_put_32 (abfd, BLR, p);
5311 return p + 4;
5312 }
5313
5314 static bfd_byte *
5315 savevr (bfd *abfd, bfd_byte *p, int r)
5316 {
5317 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5318 p = p + 4;
5319 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5320 return p + 4;
5321 }
5322
5323 static bfd_byte *
5324 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5325 {
5326 p = savevr (abfd, p, r);
5327 bfd_put_32 (abfd, BLR, p);
5328 return p + 4;
5329 }
5330
5331 static bfd_byte *
5332 restvr (bfd *abfd, bfd_byte *p, int r)
5333 {
5334 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5335 p = p + 4;
5336 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5337 return p + 4;
5338 }
5339
5340 static bfd_byte *
5341 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5342 {
5343 p = restvr (abfd, p, r);
5344 bfd_put_32 (abfd, BLR, p);
5345 return p + 4;
5346 }
5347
5348 /* Called via elf_link_hash_traverse to transfer dynamic linking
5349 information on function code symbol entries to their corresponding
5350 function descriptor symbol entries. */
5351
5352 static bfd_boolean
5353 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5354 {
5355 struct bfd_link_info *info;
5356 struct ppc_link_hash_table *htab;
5357 struct plt_entry *ent;
5358 struct ppc_link_hash_entry *fh;
5359 struct ppc_link_hash_entry *fdh;
5360 bfd_boolean force_local;
5361
5362 fh = (struct ppc_link_hash_entry *) h;
5363 if (fh->elf.root.type == bfd_link_hash_indirect)
5364 return TRUE;
5365
5366 if (fh->elf.root.type == bfd_link_hash_warning)
5367 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5368
5369 info = inf;
5370 htab = ppc_hash_table (info);
5371
5372 /* Resolve undefined references to dot-symbols as the value
5373 in the function descriptor, if we have one in a regular object.
5374 This is to satisfy cases like ".quad .foo". Calls to functions
5375 in dynamic objects are handled elsewhere. */
5376 if (fh->elf.root.type == bfd_link_hash_undefweak
5377 && fh->was_undefined
5378 && (fh->oh->elf.root.type == bfd_link_hash_defined
5379 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5380 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5381 && opd_entry_value (fh->oh->elf.root.u.def.section,
5382 fh->oh->elf.root.u.def.value,
5383 &fh->elf.root.u.def.section,
5384 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5385 {
5386 fh->elf.root.type = fh->oh->elf.root.type;
5387 fh->elf.forced_local = 1;
5388 }
5389
5390 /* If this is a function code symbol, transfer dynamic linking
5391 information to the function descriptor symbol. */
5392 if (!fh->is_func)
5393 return TRUE;
5394
5395 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5396 if (ent->plt.refcount > 0)
5397 break;
5398 if (ent == NULL
5399 || fh->elf.root.root.string[0] != '.'
5400 || fh->elf.root.root.string[1] == '\0')
5401 return TRUE;
5402
5403 /* Find the corresponding function descriptor symbol. Create it
5404 as undefined if necessary. */
5405
5406 fdh = get_fdh (fh, htab);
5407 if (fdh != NULL)
5408 while (fdh->elf.root.type == bfd_link_hash_indirect
5409 || fdh->elf.root.type == bfd_link_hash_warning)
5410 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5411
5412 if (fdh == NULL
5413 && info->shared
5414 && (fh->elf.root.type == bfd_link_hash_undefined
5415 || fh->elf.root.type == bfd_link_hash_undefweak))
5416 {
5417 flagword flags = 0;
5418 if (fh->elf.root.type == bfd_link_hash_undefweak)
5419 flags = BSF_WEAK;
5420 fdh = make_fdh (info, fh, flags);
5421 if (fdh == NULL)
5422 return FALSE;
5423 }
5424
5425 if (fdh != NULL
5426 && !fdh->elf.forced_local
5427 && (info->shared
5428 || fdh->elf.def_dynamic
5429 || fdh->elf.ref_dynamic
5430 || (fdh->elf.root.type == bfd_link_hash_undefweak
5431 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5432 {
5433 if (fdh->elf.dynindx == -1)
5434 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5435 return FALSE;
5436 fdh->elf.ref_regular |= fh->elf.ref_regular;
5437 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5438 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5439 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5440 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5441 {
5442 struct plt_entry **ep = &fdh->elf.plt.plist;
5443 while (*ep != NULL)
5444 ep = &(*ep)->next;
5445 *ep = fh->elf.plt.plist;
5446 fh->elf.plt.plist = NULL;
5447 fdh->elf.needs_plt = 1;
5448 }
5449 fdh->is_func_descriptor = 1;
5450 fdh->oh = fh;
5451 fh->oh = fdh;
5452 }
5453
5454 /* Now that the info is on the function descriptor, clear the
5455 function code sym info. Any function code syms for which we
5456 don't have a definition in a regular file, we force local.
5457 This prevents a shared library from exporting syms that have
5458 been imported from another library. Function code syms that
5459 are really in the library we must leave global to prevent the
5460 linker dragging in a definition from a static library. */
5461 force_local
5462 = (info->shared
5463 && (!fh->elf.def_regular
5464 || fdh == NULL
5465 || !fdh->elf.def_regular
5466 || fdh->elf.forced_local));
5467 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5468
5469 return TRUE;
5470 }
5471
5472 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5473 this hook to a) provide some gcc support functions, and b) transfer
5474 dynamic linking information gathered so far on function code symbol
5475 entries, to their corresponding function descriptor symbol entries. */
5476
5477 static bfd_boolean
5478 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5479 struct bfd_link_info *info)
5480 {
5481 struct ppc_link_hash_table *htab;
5482 unsigned int i;
5483 const struct sfpr_def_parms funcs[] =
5484 {
5485 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5486 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5487 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5488 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5489 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5490 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5491 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5492 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5493 { "._savef", 14, 31, savefpr, savefpr1_tail },
5494 { "._restf", 14, 31, restfpr, restfpr1_tail },
5495 { "_savevr_", 20, 31, savevr, savevr_tail },
5496 { "_restvr_", 20, 31, restvr, restvr_tail }
5497 };
5498
5499 htab = ppc_hash_table (info);
5500 if (htab->sfpr == NULL)
5501 /* We don't have any relocs. */
5502 return TRUE;
5503
5504 /* Provide any missing _save* and _rest* functions. */
5505 htab->sfpr->size = 0;
5506 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5507 if (!sfpr_define (info, &funcs[i]))
5508 return FALSE;
5509
5510 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5511
5512 if (htab->sfpr->size == 0)
5513 _bfd_strip_section_from_output (info, htab->sfpr);
5514
5515 return TRUE;
5516 }
5517
5518 /* Adjust a symbol defined by a dynamic object and referenced by a
5519 regular object. The current definition is in some section of the
5520 dynamic object, but we're not including those sections. We have to
5521 change the definition to something the rest of the link can
5522 understand. */
5523
5524 static bfd_boolean
5525 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5526 struct elf_link_hash_entry *h)
5527 {
5528 struct ppc_link_hash_table *htab;
5529 asection *s;
5530 unsigned int power_of_two;
5531
5532 htab = ppc_hash_table (info);
5533
5534 /* Deal with function syms. */
5535 if (h->type == STT_FUNC
5536 || h->needs_plt)
5537 {
5538 /* Clear procedure linkage table information for any symbol that
5539 won't need a .plt entry. */
5540 struct plt_entry *ent;
5541 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5542 if (ent->plt.refcount > 0)
5543 break;
5544 if (ent == NULL
5545 || SYMBOL_CALLS_LOCAL (info, h)
5546 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5547 && h->root.type == bfd_link_hash_undefweak))
5548 {
5549 h->plt.plist = NULL;
5550 h->needs_plt = 0;
5551 }
5552 }
5553 else
5554 h->plt.plist = NULL;
5555
5556 /* If this is a weak symbol, and there is a real definition, the
5557 processor independent code will have arranged for us to see the
5558 real definition first, and we can just use the same value. */
5559 if (h->u.weakdef != NULL)
5560 {
5561 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5562 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5563 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5564 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5565 if (ELIMINATE_COPY_RELOCS)
5566 h->non_got_ref = h->u.weakdef->non_got_ref;
5567 return TRUE;
5568 }
5569
5570 /* If we are creating a shared library, we must presume that the
5571 only references to the symbol are via the global offset table.
5572 For such cases we need not do anything here; the relocations will
5573 be handled correctly by relocate_section. */
5574 if (info->shared)
5575 return TRUE;
5576
5577 /* If there are no references to this symbol that do not use the
5578 GOT, we don't need to generate a copy reloc. */
5579 if (!h->non_got_ref)
5580 return TRUE;
5581
5582 if (ELIMINATE_COPY_RELOCS)
5583 {
5584 struct ppc_link_hash_entry * eh;
5585 struct ppc_dyn_relocs *p;
5586
5587 eh = (struct ppc_link_hash_entry *) h;
5588 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5589 {
5590 s = p->sec->output_section;
5591 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5592 break;
5593 }
5594
5595 /* If we didn't find any dynamic relocs in read-only sections, then
5596 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5597 if (p == NULL)
5598 {
5599 h->non_got_ref = 0;
5600 return TRUE;
5601 }
5602 }
5603
5604 if (h->plt.plist != NULL)
5605 {
5606 /* We should never get here, but unfortunately there are versions
5607 of gcc out there that improperly (for this ABI) put initialized
5608 function pointers, vtable refs and suchlike in read-only
5609 sections. Allow them to proceed, but warn that this might
5610 break at runtime. */
5611 (*_bfd_error_handler)
5612 (_("copy reloc against `%s' requires lazy plt linking; "
5613 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5614 h->root.root.string);
5615 }
5616
5617 /* This is a reference to a symbol defined by a dynamic object which
5618 is not a function. */
5619
5620 /* We must allocate the symbol in our .dynbss section, which will
5621 become part of the .bss section of the executable. There will be
5622 an entry for this symbol in the .dynsym section. The dynamic
5623 object will contain position independent code, so all references
5624 from the dynamic object to this symbol will go through the global
5625 offset table. The dynamic linker will use the .dynsym entry to
5626 determine the address it must put in the global offset table, so
5627 both the dynamic object and the regular object will refer to the
5628 same memory location for the variable. */
5629
5630 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5631 to copy the initial value out of the dynamic object and into the
5632 runtime process image. We need to remember the offset into the
5633 .rela.bss section we are going to use. */
5634 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5635 {
5636 htab->relbss->size += sizeof (Elf64_External_Rela);
5637 h->needs_copy = 1;
5638 }
5639
5640 /* We need to figure out the alignment required for this symbol. I
5641 have no idea how ELF linkers handle this. */
5642 power_of_two = bfd_log2 (h->size);
5643 if (power_of_two > 4)
5644 power_of_two = 4;
5645
5646 /* Apply the required alignment. */
5647 s = htab->dynbss;
5648 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5649 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5650 {
5651 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5652 return FALSE;
5653 }
5654
5655 /* Define the symbol as being at this point in the section. */
5656 h->root.u.def.section = s;
5657 h->root.u.def.value = s->size;
5658
5659 /* Increment the section size to make room for the symbol. */
5660 s->size += h->size;
5661
5662 return TRUE;
5663 }
5664
5665 /* If given a function descriptor symbol, hide both the function code
5666 sym and the descriptor. */
5667 static void
5668 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5669 struct elf_link_hash_entry *h,
5670 bfd_boolean force_local)
5671 {
5672 struct ppc_link_hash_entry *eh;
5673 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5674
5675 eh = (struct ppc_link_hash_entry *) h;
5676 if (eh->is_func_descriptor)
5677 {
5678 struct ppc_link_hash_entry *fh = eh->oh;
5679
5680 if (fh == NULL)
5681 {
5682 const char *p, *q;
5683 struct ppc_link_hash_table *htab;
5684 char save;
5685
5686 /* We aren't supposed to use alloca in BFD because on
5687 systems which do not have alloca the version in libiberty
5688 calls xmalloc, which might cause the program to crash
5689 when it runs out of memory. This function doesn't have a
5690 return status, so there's no way to gracefully return an
5691 error. So cheat. We know that string[-1] can be safely
5692 accessed; It's either a string in an ELF string table,
5693 or allocated in an objalloc structure. */
5694
5695 p = eh->elf.root.root.string - 1;
5696 save = *p;
5697 *(char *) p = '.';
5698 htab = ppc_hash_table (info);
5699 fh = (struct ppc_link_hash_entry *)
5700 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5701 *(char *) p = save;
5702
5703 /* Unfortunately, if it so happens that the string we were
5704 looking for was allocated immediately before this string,
5705 then we overwrote the string terminator. That's the only
5706 reason the lookup should fail. */
5707 if (fh == NULL)
5708 {
5709 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5710 while (q >= eh->elf.root.root.string && *q == *p)
5711 --q, --p;
5712 if (q < eh->elf.root.root.string && *p == '.')
5713 fh = (struct ppc_link_hash_entry *)
5714 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5715 }
5716 if (fh != NULL)
5717 {
5718 eh->oh = fh;
5719 fh->oh = eh;
5720 }
5721 }
5722 if (fh != NULL)
5723 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5724 }
5725 }
5726
5727 static bfd_boolean
5728 get_sym_h (struct elf_link_hash_entry **hp,
5729 Elf_Internal_Sym **symp,
5730 asection **symsecp,
5731 char **tls_maskp,
5732 Elf_Internal_Sym **locsymsp,
5733 unsigned long r_symndx,
5734 bfd *ibfd)
5735 {
5736 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5737
5738 if (r_symndx >= symtab_hdr->sh_info)
5739 {
5740 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5741 struct elf_link_hash_entry *h;
5742
5743 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5744 while (h->root.type == bfd_link_hash_indirect
5745 || h->root.type == bfd_link_hash_warning)
5746 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5747
5748 if (hp != NULL)
5749 *hp = h;
5750
5751 if (symp != NULL)
5752 *symp = NULL;
5753
5754 if (symsecp != NULL)
5755 {
5756 asection *symsec = NULL;
5757 if (h->root.type == bfd_link_hash_defined
5758 || h->root.type == bfd_link_hash_defweak)
5759 symsec = h->root.u.def.section;
5760 *symsecp = symsec;
5761 }
5762
5763 if (tls_maskp != NULL)
5764 {
5765 struct ppc_link_hash_entry *eh;
5766
5767 eh = (struct ppc_link_hash_entry *) h;
5768 *tls_maskp = &eh->tls_mask;
5769 }
5770 }
5771 else
5772 {
5773 Elf_Internal_Sym *sym;
5774 Elf_Internal_Sym *locsyms = *locsymsp;
5775
5776 if (locsyms == NULL)
5777 {
5778 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5779 if (locsyms == NULL)
5780 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5781 symtab_hdr->sh_info,
5782 0, NULL, NULL, NULL);
5783 if (locsyms == NULL)
5784 return FALSE;
5785 *locsymsp = locsyms;
5786 }
5787 sym = locsyms + r_symndx;
5788
5789 if (hp != NULL)
5790 *hp = NULL;
5791
5792 if (symp != NULL)
5793 *symp = sym;
5794
5795 if (symsecp != NULL)
5796 {
5797 asection *symsec = NULL;
5798 if ((sym->st_shndx != SHN_UNDEF
5799 && sym->st_shndx < SHN_LORESERVE)
5800 || sym->st_shndx > SHN_HIRESERVE)
5801 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5802 *symsecp = symsec;
5803 }
5804
5805 if (tls_maskp != NULL)
5806 {
5807 struct got_entry **lgot_ents;
5808 char *tls_mask;
5809
5810 tls_mask = NULL;
5811 lgot_ents = elf_local_got_ents (ibfd);
5812 if (lgot_ents != NULL)
5813 {
5814 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5815 tls_mask = &lgot_masks[r_symndx];
5816 }
5817 *tls_maskp = tls_mask;
5818 }
5819 }
5820 return TRUE;
5821 }
5822
5823 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5824 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5825 type suitable for optimization, and 1 otherwise. */
5826
5827 static int
5828 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5829 Elf_Internal_Sym **locsymsp,
5830 const Elf_Internal_Rela *rel, bfd *ibfd)
5831 {
5832 unsigned long r_symndx;
5833 int next_r;
5834 struct elf_link_hash_entry *h;
5835 Elf_Internal_Sym *sym;
5836 asection *sec;
5837 bfd_vma off;
5838
5839 r_symndx = ELF64_R_SYM (rel->r_info);
5840 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5841 return 0;
5842
5843 if ((*tls_maskp != NULL && **tls_maskp != 0)
5844 || sec == NULL
5845 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5846 return 1;
5847
5848 /* Look inside a TOC section too. */
5849 if (h != NULL)
5850 {
5851 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5852 off = h->root.u.def.value;
5853 }
5854 else
5855 off = sym->st_value;
5856 off += rel->r_addend;
5857 BFD_ASSERT (off % 8 == 0);
5858 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5859 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5860 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5861 return 0;
5862 if (toc_symndx != NULL)
5863 *toc_symndx = r_symndx;
5864 if ((h == NULL
5865 || ((h->root.type == bfd_link_hash_defined
5866 || h->root.type == bfd_link_hash_defweak)
5867 && !h->def_dynamic))
5868 && (next_r == -1 || next_r == -2))
5869 return 1 - next_r;
5870 return 1;
5871 }
5872
5873 /* Adjust all global syms defined in opd sections. In gcc generated
5874 code for the old ABI, these will already have been done. */
5875
5876 static bfd_boolean
5877 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5878 {
5879 struct ppc_link_hash_entry *eh;
5880 asection *sym_sec;
5881 long *opd_adjust;
5882
5883 if (h->root.type == bfd_link_hash_indirect)
5884 return TRUE;
5885
5886 if (h->root.type == bfd_link_hash_warning)
5887 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5888
5889 if (h->root.type != bfd_link_hash_defined
5890 && h->root.type != bfd_link_hash_defweak)
5891 return TRUE;
5892
5893 eh = (struct ppc_link_hash_entry *) h;
5894 if (eh->adjust_done)
5895 return TRUE;
5896
5897 sym_sec = eh->elf.root.u.def.section;
5898 opd_adjust = get_opd_info (sym_sec);
5899 if (opd_adjust != NULL)
5900 {
5901 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5902 if (adjust == -1)
5903 {
5904 /* This entry has been deleted. */
5905 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5906 if (dsec == NULL)
5907 {
5908 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5909 if (elf_discarded_section (dsec))
5910 {
5911 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5912 break;
5913 }
5914 }
5915 eh->elf.root.u.def.value = 0;
5916 eh->elf.root.u.def.section = dsec;
5917 }
5918 else
5919 eh->elf.root.u.def.value += adjust;
5920 eh->adjust_done = 1;
5921 }
5922 return TRUE;
5923 }
5924
5925 /* Remove unused Official Procedure Descriptor entries. Currently we
5926 only remove those associated with functions in discarded link-once
5927 sections, or weakly defined functions that have been overridden. It
5928 would be possible to remove many more entries for statically linked
5929 applications. */
5930
5931 bfd_boolean
5932 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
5933 bfd_boolean non_overlapping)
5934 {
5935 bfd *ibfd;
5936 bfd_boolean some_edited = FALSE;
5937 asection *need_pad = NULL;
5938
5939 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5940 {
5941 asection *sec;
5942 Elf_Internal_Rela *relstart, *rel, *relend;
5943 Elf_Internal_Shdr *symtab_hdr;
5944 Elf_Internal_Sym *local_syms;
5945 struct elf_link_hash_entry **sym_hashes;
5946 bfd_vma offset;
5947 bfd_size_type amt;
5948 long *opd_adjust;
5949 bfd_boolean need_edit, add_aux_fields;
5950 bfd_size_type cnt_16b = 0;
5951
5952 sec = bfd_get_section_by_name (ibfd, ".opd");
5953 if (sec == NULL)
5954 continue;
5955
5956 amt = sec->size * sizeof (long) / 8;
5957 opd_adjust = get_opd_info (sec);
5958 if (opd_adjust == NULL)
5959 {
5960 /* check_relocs hasn't been called. Must be a ld -r link
5961 or --just-symbols object. */
5962 opd_adjust = bfd_zalloc (obfd, amt);
5963 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
5964 }
5965 memset (opd_adjust, 0, amt);
5966
5967 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
5968 continue;
5969
5970 if (sec->output_section == bfd_abs_section_ptr)
5971 continue;
5972
5973 /* Look through the section relocs. */
5974 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
5975 continue;
5976
5977 local_syms = NULL;
5978 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5979 sym_hashes = elf_sym_hashes (ibfd);
5980
5981 /* Read the relocations. */
5982 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5983 info->keep_memory);
5984 if (relstart == NULL)
5985 return FALSE;
5986
5987 /* First run through the relocs to check they are sane, and to
5988 determine whether we need to edit this opd section. */
5989 need_edit = FALSE;
5990 need_pad = sec;
5991 offset = 0;
5992 relend = relstart + sec->reloc_count;
5993 for (rel = relstart; rel < relend; )
5994 {
5995 enum elf_ppc64_reloc_type r_type;
5996 unsigned long r_symndx;
5997 asection *sym_sec;
5998 struct elf_link_hash_entry *h;
5999 Elf_Internal_Sym *sym;
6000
6001 /* .opd contains a regular array of 16 or 24 byte entries. We're
6002 only interested in the reloc pointing to a function entry
6003 point. */
6004 if (rel->r_offset != offset
6005 || rel + 1 >= relend
6006 || (rel + 1)->r_offset != offset + 8)
6007 {
6008 /* If someone messes with .opd alignment then after a
6009 "ld -r" we might have padding in the middle of .opd.
6010 Also, there's nothing to prevent someone putting
6011 something silly in .opd with the assembler. No .opd
6012 optimization for them! */
6013 broken_opd:
6014 (*_bfd_error_handler)
6015 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6016 need_edit = FALSE;
6017 break;
6018 }
6019
6020 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6021 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6022 {
6023 (*_bfd_error_handler)
6024 (_("%B: unexpected reloc type %u in .opd section"),
6025 ibfd, r_type);
6026 need_edit = FALSE;
6027 break;
6028 }
6029
6030 r_symndx = ELF64_R_SYM (rel->r_info);
6031 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6032 r_symndx, ibfd))
6033 goto error_ret;
6034
6035 if (sym_sec == NULL || sym_sec->owner == NULL)
6036 {
6037 const char *sym_name;
6038 if (h != NULL)
6039 sym_name = h->root.root.string;
6040 else
6041 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym);
6042
6043 (*_bfd_error_handler)
6044 (_("%B: undefined sym `%s' in .opd section"),
6045 ibfd, sym_name);
6046 need_edit = FALSE;
6047 break;
6048 }
6049
6050 /* opd entries are always for functions defined in the
6051 current input bfd. If the symbol isn't defined in the
6052 input bfd, then we won't be using the function in this
6053 bfd; It must be defined in a linkonce section in another
6054 bfd, or is weak. It's also possible that we are
6055 discarding the function due to a linker script /DISCARD/,
6056 which we test for via the output_section. */
6057 if (sym_sec->owner != ibfd
6058 || sym_sec->output_section == bfd_abs_section_ptr)
6059 need_edit = TRUE;
6060
6061 rel += 2;
6062 if (rel == relend
6063 || (rel + 1 == relend && rel->r_offset == offset + 16))
6064 {
6065 if (sec->size == offset + 24)
6066 {
6067 need_pad = NULL;
6068 break;
6069 }
6070 if (rel == relend && sec->size == offset + 16)
6071 {
6072 cnt_16b++;
6073 break;
6074 }
6075 goto broken_opd;
6076 }
6077
6078 if (rel->r_offset == offset + 24)
6079 offset += 24;
6080 else if (rel->r_offset != offset + 16)
6081 goto broken_opd;
6082 else if (rel + 1 < relend
6083 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6084 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6085 {
6086 offset += 16;
6087 cnt_16b++;
6088 }
6089 else if (rel + 2 < relend
6090 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6091 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6092 {
6093 offset += 24;
6094 rel += 1;
6095 }
6096 else
6097 goto broken_opd;
6098 }
6099
6100 add_aux_fields = non_overlapping && cnt_16b > 0;
6101
6102 if (need_edit || add_aux_fields)
6103 {
6104 Elf_Internal_Rela *write_rel;
6105 bfd_byte *rptr, *wptr;
6106 bfd_byte *new_contents = NULL;
6107 bfd_boolean skip;
6108 long opd_ent_size;
6109
6110 /* This seems a waste of time as input .opd sections are all
6111 zeros as generated by gcc, but I suppose there's no reason
6112 this will always be so. We might start putting something in
6113 the third word of .opd entries. */
6114 if ((sec->flags & SEC_IN_MEMORY) == 0)
6115 {
6116 bfd_byte *loc;
6117 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6118 {
6119 if (loc != NULL)
6120 free (loc);
6121 error_ret:
6122 if (local_syms != NULL
6123 && symtab_hdr->contents != (unsigned char *) local_syms)
6124 free (local_syms);
6125 if (elf_section_data (sec)->relocs != relstart)
6126 free (relstart);
6127 return FALSE;
6128 }
6129 sec->contents = loc;
6130 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6131 }
6132
6133 elf_section_data (sec)->relocs = relstart;
6134
6135 wptr = sec->contents;
6136 rptr = sec->contents;
6137 new_contents = sec->contents;
6138
6139 if (add_aux_fields)
6140 {
6141 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6142 if (new_contents == NULL)
6143 return FALSE;
6144 need_pad = FALSE;
6145 wptr = new_contents;
6146 }
6147
6148 write_rel = relstart;
6149 skip = FALSE;
6150 offset = 0;
6151 opd_ent_size = 0;
6152 for (rel = relstart; rel < relend; rel++)
6153 {
6154 unsigned long r_symndx;
6155 asection *sym_sec;
6156 struct elf_link_hash_entry *h;
6157 Elf_Internal_Sym *sym;
6158
6159 r_symndx = ELF64_R_SYM (rel->r_info);
6160 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6161 r_symndx, ibfd))
6162 goto error_ret;
6163
6164 if (rel->r_offset == offset)
6165 {
6166 struct ppc_link_hash_entry *fdh = NULL;
6167
6168 /* See if the .opd entry is full 24 byte or
6169 16 byte (with fd_aux entry overlapped with next
6170 fd_func). */
6171 opd_ent_size = 24;
6172 if ((rel + 2 == relend && sec->size == offset + 16)
6173 || (rel + 3 < relend
6174 && rel[2].r_offset == offset + 16
6175 && rel[3].r_offset == offset + 24
6176 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6177 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6178 opd_ent_size = 16;
6179
6180 if (h != NULL
6181 && h->root.root.string[0] == '.')
6182 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6183 ppc_hash_table (info));
6184
6185 skip = (sym_sec->owner != ibfd
6186 || sym_sec->output_section == bfd_abs_section_ptr);
6187 if (skip)
6188 {
6189 if (fdh != NULL && sym_sec->owner == ibfd)
6190 {
6191 /* Arrange for the function descriptor sym
6192 to be dropped. */
6193 fdh->elf.root.u.def.value = 0;
6194 fdh->elf.root.u.def.section = sym_sec;
6195 }
6196 opd_adjust[rel->r_offset / 8] = -1;
6197 }
6198 else
6199 {
6200 /* We'll be keeping this opd entry. */
6201
6202 if (fdh != NULL)
6203 {
6204 /* Redefine the function descriptor symbol to
6205 this location in the opd section. It is
6206 necessary to update the value here rather
6207 than using an array of adjustments as we do
6208 for local symbols, because various places
6209 in the generic ELF code use the value
6210 stored in u.def.value. */
6211 fdh->elf.root.u.def.value = wptr - new_contents;
6212 fdh->adjust_done = 1;
6213 }
6214
6215 /* Local syms are a bit tricky. We could
6216 tweak them as they can be cached, but
6217 we'd need to look through the local syms
6218 for the function descriptor sym which we
6219 don't have at the moment. So keep an
6220 array of adjustments. */
6221 opd_adjust[rel->r_offset / 8]
6222 = (wptr - new_contents) - (rptr - sec->contents);
6223
6224 if (wptr != rptr)
6225 memcpy (wptr, rptr, opd_ent_size);
6226 wptr += opd_ent_size;
6227 if (add_aux_fields && opd_ent_size == 16)
6228 {
6229 memset (wptr, '\0', 8);
6230 wptr += 8;
6231 }
6232 }
6233 rptr += opd_ent_size;
6234 offset += opd_ent_size;
6235 }
6236
6237 if (skip)
6238 {
6239 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
6240 if (info->shared)
6241 {
6242 /* We won't be needing dynamic relocs here. */
6243 struct ppc_dyn_relocs **pp;
6244 struct ppc_dyn_relocs *p;
6245
6246 if (h != NULL)
6247 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6248 else if (sym_sec != NULL)
6249 pp = ((struct ppc_dyn_relocs **)
6250 &elf_section_data (sym_sec)->local_dynrel);
6251 else
6252 pp = ((struct ppc_dyn_relocs **)
6253 &elf_section_data (sec)->local_dynrel);
6254 while ((p = *pp) != NULL)
6255 {
6256 if (p->sec == sec)
6257 {
6258 p->count -= 1;
6259 if (p->count == 0)
6260 *pp = p->next;
6261 break;
6262 }
6263 pp = &p->next;
6264 }
6265 }
6266 }
6267 else
6268 {
6269 /* We need to adjust any reloc offsets to point to the
6270 new opd entries. While we're at it, we may as well
6271 remove redundant relocs. */
6272 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6273 if (write_rel != rel)
6274 memcpy (write_rel, rel, sizeof (*rel));
6275 ++write_rel;
6276 }
6277 }
6278
6279 sec->size = wptr - new_contents;
6280 sec->reloc_count = write_rel - relstart;
6281 if (add_aux_fields)
6282 {
6283 free (sec->contents);
6284 sec->contents = new_contents;
6285 }
6286
6287 /* Fudge the size too, as this is used later in
6288 elf_bfd_final_link if we are emitting relocs. */
6289 elf_section_data (sec)->rel_hdr.sh_size
6290 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6291 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6292 some_edited = TRUE;
6293 }
6294 else if (elf_section_data (sec)->relocs != relstart)
6295 free (relstart);
6296
6297 if (local_syms != NULL
6298 && symtab_hdr->contents != (unsigned char *) local_syms)
6299 {
6300 if (!info->keep_memory)
6301 free (local_syms);
6302 else
6303 symtab_hdr->contents = (unsigned char *) local_syms;
6304 }
6305 }
6306
6307 if (some_edited)
6308 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6309
6310 /* If we are doing a final link and the last .opd entry is just 16 byte
6311 long, add a 8 byte padding after it. */
6312 if (need_pad != NULL && !info->relocatable)
6313 {
6314 bfd_byte *p;
6315
6316 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6317 {
6318 BFD_ASSERT (need_pad->size > 0);
6319
6320 p = bfd_malloc (need_pad->size + 8);
6321 if (p == NULL)
6322 return FALSE;
6323
6324 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6325 p, 0, need_pad->size))
6326 return FALSE;
6327
6328 need_pad->contents = p;
6329 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6330 }
6331 else
6332 {
6333 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6334 if (p == NULL)
6335 return FALSE;
6336
6337 need_pad->contents = p;
6338 }
6339
6340 memset (need_pad->contents + need_pad->size, 0, 8);
6341 need_pad->size += 8;
6342 }
6343
6344 return TRUE;
6345 }
6346
6347 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6348
6349 asection *
6350 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6351 {
6352 struct ppc_link_hash_table *htab;
6353
6354 htab = ppc_hash_table (info);
6355 if (htab->tls_get_addr != NULL)
6356 {
6357 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6358
6359 while (h->elf.root.type == bfd_link_hash_indirect
6360 || h->elf.root.type == bfd_link_hash_warning)
6361 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6362
6363 htab->tls_get_addr = h;
6364
6365 if (htab->tls_get_addr_fd == NULL
6366 && h->oh != NULL
6367 && h->oh->is_func_descriptor)
6368 htab->tls_get_addr_fd = h->oh;
6369 }
6370
6371 if (htab->tls_get_addr_fd != NULL)
6372 {
6373 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6374
6375 while (h->elf.root.type == bfd_link_hash_indirect
6376 || h->elf.root.type == bfd_link_hash_warning)
6377 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6378
6379 htab->tls_get_addr_fd = h;
6380 }
6381
6382 return _bfd_elf_tls_setup (obfd, info);
6383 }
6384
6385 /* Run through all the TLS relocs looking for optimization
6386 opportunities. The linker has been hacked (see ppc64elf.em) to do
6387 a preliminary section layout so that we know the TLS segment
6388 offsets. We can't optimize earlier because some optimizations need
6389 to know the tp offset, and we need to optimize before allocating
6390 dynamic relocations. */
6391
6392 bfd_boolean
6393 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6394 {
6395 bfd *ibfd;
6396 asection *sec;
6397 struct ppc_link_hash_table *htab;
6398
6399 if (info->relocatable || info->shared)
6400 return TRUE;
6401
6402 htab = ppc_hash_table (info);
6403 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6404 {
6405 Elf_Internal_Sym *locsyms = NULL;
6406
6407 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6408 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6409 {
6410 Elf_Internal_Rela *relstart, *rel, *relend;
6411 int expecting_tls_get_addr;
6412
6413 /* Read the relocations. */
6414 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6415 info->keep_memory);
6416 if (relstart == NULL)
6417 return FALSE;
6418
6419 expecting_tls_get_addr = 0;
6420 relend = relstart + sec->reloc_count;
6421 for (rel = relstart; rel < relend; rel++)
6422 {
6423 enum elf_ppc64_reloc_type r_type;
6424 unsigned long r_symndx;
6425 struct elf_link_hash_entry *h;
6426 Elf_Internal_Sym *sym;
6427 asection *sym_sec;
6428 char *tls_mask;
6429 char tls_set, tls_clear, tls_type = 0;
6430 bfd_vma value;
6431 bfd_boolean ok_tprel, is_local;
6432
6433 r_symndx = ELF64_R_SYM (rel->r_info);
6434 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6435 r_symndx, ibfd))
6436 {
6437 err_free_rel:
6438 if (elf_section_data (sec)->relocs != relstart)
6439 free (relstart);
6440 if (locsyms != NULL
6441 && (elf_tdata (ibfd)->symtab_hdr.contents
6442 != (unsigned char *) locsyms))
6443 free (locsyms);
6444 return FALSE;
6445 }
6446
6447 if (h != NULL)
6448 {
6449 if (h->root.type != bfd_link_hash_defined
6450 && h->root.type != bfd_link_hash_defweak)
6451 continue;
6452 value = h->root.u.def.value;
6453 }
6454 else
6455 /* Symbols referenced by TLS relocs must be of type
6456 STT_TLS. So no need for .opd local sym adjust. */
6457 value = sym->st_value;
6458
6459 ok_tprel = FALSE;
6460 is_local = FALSE;
6461 if (h == NULL
6462 || !h->def_dynamic)
6463 {
6464 is_local = TRUE;
6465 value += sym_sec->output_offset;
6466 value += sym_sec->output_section->vma;
6467 value -= htab->elf.tls_sec->vma;
6468 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6469 < (bfd_vma) 1 << 32);
6470 }
6471
6472 r_type = ELF64_R_TYPE (rel->r_info);
6473 switch (r_type)
6474 {
6475 case R_PPC64_GOT_TLSLD16:
6476 case R_PPC64_GOT_TLSLD16_LO:
6477 case R_PPC64_GOT_TLSLD16_HI:
6478 case R_PPC64_GOT_TLSLD16_HA:
6479 /* These relocs should never be against a symbol
6480 defined in a shared lib. Leave them alone if
6481 that turns out to be the case. */
6482 ppc64_tlsld_got (ibfd)->refcount -= 1;
6483 if (!is_local)
6484 continue;
6485
6486 /* LD -> LE */
6487 tls_set = 0;
6488 tls_clear = TLS_LD;
6489 tls_type = TLS_TLS | TLS_LD;
6490 expecting_tls_get_addr = 1;
6491 break;
6492
6493 case R_PPC64_GOT_TLSGD16:
6494 case R_PPC64_GOT_TLSGD16_LO:
6495 case R_PPC64_GOT_TLSGD16_HI:
6496 case R_PPC64_GOT_TLSGD16_HA:
6497 if (ok_tprel)
6498 /* GD -> LE */
6499 tls_set = 0;
6500 else
6501 /* GD -> IE */
6502 tls_set = TLS_TLS | TLS_TPRELGD;
6503 tls_clear = TLS_GD;
6504 tls_type = TLS_TLS | TLS_GD;
6505 expecting_tls_get_addr = 1;
6506 break;
6507
6508 case R_PPC64_GOT_TPREL16_DS:
6509 case R_PPC64_GOT_TPREL16_LO_DS:
6510 case R_PPC64_GOT_TPREL16_HI:
6511 case R_PPC64_GOT_TPREL16_HA:
6512 expecting_tls_get_addr = 0;
6513 if (ok_tprel)
6514 {
6515 /* IE -> LE */
6516 tls_set = 0;
6517 tls_clear = TLS_TPREL;
6518 tls_type = TLS_TLS | TLS_TPREL;
6519 break;
6520 }
6521 else
6522 continue;
6523
6524 case R_PPC64_REL14:
6525 case R_PPC64_REL14_BRTAKEN:
6526 case R_PPC64_REL14_BRNTAKEN:
6527 case R_PPC64_REL24:
6528 if (h != NULL
6529 && (h == &htab->tls_get_addr->elf
6530 || h == &htab->tls_get_addr_fd->elf))
6531 {
6532 if (!expecting_tls_get_addr
6533 && rel != relstart
6534 && ((ELF64_R_TYPE (rel[-1].r_info)
6535 == R_PPC64_TOC16)
6536 || (ELF64_R_TYPE (rel[-1].r_info)
6537 == R_PPC64_TOC16_LO)))
6538 {
6539 /* Check for toc tls entries. */
6540 char *toc_tls;
6541 int retval;
6542
6543 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6544 rel - 1, ibfd);
6545 if (retval == 0)
6546 goto err_free_rel;
6547 if (toc_tls != NULL)
6548 expecting_tls_get_addr = retval > 1;
6549 }
6550
6551 if (expecting_tls_get_addr)
6552 {
6553 struct plt_entry *ent;
6554 for (ent = h->plt.plist; ent; ent = ent->next)
6555 if (ent->addend == 0)
6556 {
6557 if (ent->plt.refcount > 0)
6558 ent->plt.refcount -= 1;
6559 break;
6560 }
6561 }
6562 }
6563 expecting_tls_get_addr = 0;
6564 continue;
6565
6566 case R_PPC64_TPREL64:
6567 expecting_tls_get_addr = 0;
6568 if (ok_tprel)
6569 {
6570 /* IE -> LE */
6571 tls_set = TLS_EXPLICIT;
6572 tls_clear = TLS_TPREL;
6573 break;
6574 }
6575 else
6576 continue;
6577
6578 case R_PPC64_DTPMOD64:
6579 expecting_tls_get_addr = 0;
6580 if (rel + 1 < relend
6581 && (rel[1].r_info
6582 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6583 && rel[1].r_offset == rel->r_offset + 8)
6584 {
6585 if (ok_tprel)
6586 /* GD -> LE */
6587 tls_set = TLS_EXPLICIT | TLS_GD;
6588 else
6589 /* GD -> IE */
6590 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6591 tls_clear = TLS_GD;
6592 }
6593 else
6594 {
6595 if (!is_local)
6596 continue;
6597
6598 /* LD -> LE */
6599 tls_set = TLS_EXPLICIT;
6600 tls_clear = TLS_LD;
6601 }
6602 break;
6603
6604 default:
6605 expecting_tls_get_addr = 0;
6606 continue;
6607 }
6608
6609 if ((tls_set & TLS_EXPLICIT) == 0)
6610 {
6611 struct got_entry *ent;
6612
6613 /* Adjust got entry for this reloc. */
6614 if (h != NULL)
6615 ent = h->got.glist;
6616 else
6617 ent = elf_local_got_ents (ibfd)[r_symndx];
6618
6619 for (; ent != NULL; ent = ent->next)
6620 if (ent->addend == rel->r_addend
6621 && ent->owner == ibfd
6622 && ent->tls_type == tls_type)
6623 break;
6624 if (ent == NULL)
6625 abort ();
6626
6627 if (tls_set == 0)
6628 {
6629 /* We managed to get rid of a got entry. */
6630 if (ent->got.refcount > 0)
6631 ent->got.refcount -= 1;
6632 }
6633 }
6634 else if (h != NULL)
6635 {
6636 struct ppc_link_hash_entry * eh;
6637 struct ppc_dyn_relocs **pp;
6638 struct ppc_dyn_relocs *p;
6639
6640 /* Adjust dynamic relocs. */
6641 eh = (struct ppc_link_hash_entry *) h;
6642 for (pp = &eh->dyn_relocs;
6643 (p = *pp) != NULL;
6644 pp = &p->next)
6645 if (p->sec == sec)
6646 {
6647 /* If we got rid of a DTPMOD/DTPREL reloc
6648 pair then we'll lose one or two dyn
6649 relocs. */
6650 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6651 p->count -= 1;
6652 p->count -= 1;
6653 if (p->count == 0)
6654 *pp = p->next;
6655 break;
6656 }
6657 }
6658
6659 *tls_mask |= tls_set;
6660 *tls_mask &= ~tls_clear;
6661 }
6662
6663 if (elf_section_data (sec)->relocs != relstart)
6664 free (relstart);
6665 }
6666
6667 if (locsyms != NULL
6668 && (elf_tdata (ibfd)->symtab_hdr.contents
6669 != (unsigned char *) locsyms))
6670 {
6671 if (!info->keep_memory)
6672 free (locsyms);
6673 else
6674 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6675 }
6676 }
6677 return TRUE;
6678 }
6679
6680 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6681 the values of any global symbols in a toc section that has been
6682 edited. Globals in toc sections should be a rarity, so this function
6683 sets a flag if any are found in toc sections other than the one just
6684 edited, so that futher hash table traversals can be avoided. */
6685
6686 struct adjust_toc_info
6687 {
6688 asection *toc;
6689 unsigned long *skip;
6690 bfd_boolean global_toc_syms;
6691 };
6692
6693 static bfd_boolean
6694 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6695 {
6696 struct ppc_link_hash_entry *eh;
6697 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6698
6699 if (h->root.type == bfd_link_hash_indirect)
6700 return TRUE;
6701
6702 if (h->root.type == bfd_link_hash_warning)
6703 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6704
6705 if (h->root.type != bfd_link_hash_defined
6706 && h->root.type != bfd_link_hash_defweak)
6707 return TRUE;
6708
6709 eh = (struct ppc_link_hash_entry *) h;
6710 if (eh->adjust_done)
6711 return TRUE;
6712
6713 if (eh->elf.root.u.def.section == toc_inf->toc)
6714 {
6715 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6716 if (skip != (unsigned long) -1)
6717 eh->elf.root.u.def.value -= skip;
6718 else
6719 {
6720 (*_bfd_error_handler)
6721 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6722 eh->elf.root.u.def.section = &bfd_abs_section;
6723 eh->elf.root.u.def.value = 0;
6724 }
6725 eh->adjust_done = 1;
6726 }
6727 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6728 toc_inf->global_toc_syms = TRUE;
6729
6730 return TRUE;
6731 }
6732
6733 /* Examine all relocs referencing .toc sections in order to remove
6734 unused .toc entries. */
6735
6736 bfd_boolean
6737 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6738 {
6739 bfd *ibfd;
6740 struct adjust_toc_info toc_inf;
6741
6742 toc_inf.global_toc_syms = TRUE;
6743 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6744 {
6745 asection *toc, *sec;
6746 Elf_Internal_Shdr *symtab_hdr;
6747 Elf_Internal_Sym *local_syms;
6748 struct elf_link_hash_entry **sym_hashes;
6749 Elf_Internal_Rela *relstart, *rel, *wrel;
6750 unsigned long *skip, *drop;
6751 unsigned char *used;
6752 unsigned char *keep, last, some_unused;
6753
6754 toc = bfd_get_section_by_name (ibfd, ".toc");
6755 if (toc == NULL
6756 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6757 || elf_discarded_section (toc))
6758 continue;
6759
6760 local_syms = NULL;
6761 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6762 sym_hashes = elf_sym_hashes (ibfd);
6763
6764 /* Look at sections dropped from the final link. */
6765 skip = NULL;
6766 relstart = NULL;
6767 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6768 {
6769 if (sec->reloc_count == 0
6770 || !elf_discarded_section (sec)
6771 || get_opd_info (sec)
6772 || (sec->flags & SEC_ALLOC) == 0
6773 || (sec->flags & SEC_DEBUGGING) != 0)
6774 continue;
6775
6776 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6777 if (relstart == NULL)
6778 goto error_ret;
6779
6780 /* Run through the relocs to see which toc entries might be
6781 unused. */
6782 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6783 {
6784 enum elf_ppc64_reloc_type r_type;
6785 unsigned long r_symndx;
6786 asection *sym_sec;
6787 struct elf_link_hash_entry *h;
6788 Elf_Internal_Sym *sym;
6789 bfd_vma val;
6790
6791 r_type = ELF64_R_TYPE (rel->r_info);
6792 switch (r_type)
6793 {
6794 default:
6795 continue;
6796
6797 case R_PPC64_TOC16:
6798 case R_PPC64_TOC16_LO:
6799 case R_PPC64_TOC16_HI:
6800 case R_PPC64_TOC16_HA:
6801 case R_PPC64_TOC16_DS:
6802 case R_PPC64_TOC16_LO_DS:
6803 break;
6804 }
6805
6806 r_symndx = ELF64_R_SYM (rel->r_info);
6807 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6808 r_symndx, ibfd))
6809 goto error_ret;
6810
6811 if (sym_sec != toc)
6812 continue;
6813
6814 if (h != NULL)
6815 val = h->root.u.def.value;
6816 else
6817 val = sym->st_value;
6818 val += rel->r_addend;
6819
6820 if (val >= toc->size)
6821 continue;
6822
6823 /* Anything in the toc ought to be aligned to 8 bytes.
6824 If not, don't mark as unused. */
6825 if (val & 7)
6826 continue;
6827
6828 if (skip == NULL)
6829 {
6830 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
6831 if (skip == NULL)
6832 goto error_ret;
6833 }
6834
6835 skip[val >> 3] = 1;
6836 }
6837
6838 if (elf_section_data (sec)->relocs != relstart)
6839 free (relstart);
6840 }
6841
6842 if (skip == NULL)
6843 continue;
6844
6845 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
6846 if (used == NULL)
6847 {
6848 error_ret:
6849 if (local_syms != NULL
6850 && symtab_hdr->contents != (unsigned char *) local_syms)
6851 free (local_syms);
6852 if (sec != NULL
6853 && relstart != NULL
6854 && elf_section_data (sec)->relocs != relstart)
6855 free (relstart);
6856 if (skip != NULL)
6857 free (skip);
6858 return FALSE;
6859 }
6860
6861 /* Now check all kept sections that might reference the toc. */
6862 for (sec = ibfd->sections;
6863 sec != NULL;
6864 /* Check the toc itself last. */
6865 sec = (sec == toc ? NULL
6866 : sec->next == toc && sec->next->next ? sec->next->next
6867 : sec->next == NULL ? toc
6868 : sec->next))
6869 {
6870 int repeat;
6871
6872 if (sec->reloc_count == 0
6873 || elf_discarded_section (sec)
6874 || get_opd_info (sec)
6875 || (sec->flags & SEC_ALLOC) == 0
6876 || (sec->flags & SEC_DEBUGGING) != 0)
6877 continue;
6878
6879 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
6880 if (relstart == NULL)
6881 goto error_ret;
6882
6883 /* Mark toc entries referenced as used. */
6884 repeat = 0;
6885 do
6886 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6887 {
6888 enum elf_ppc64_reloc_type r_type;
6889 unsigned long r_symndx;
6890 asection *sym_sec;
6891 struct elf_link_hash_entry *h;
6892 Elf_Internal_Sym *sym;
6893 bfd_vma val;
6894
6895 r_type = ELF64_R_TYPE (rel->r_info);
6896 switch (r_type)
6897 {
6898 case R_PPC64_TOC16:
6899 case R_PPC64_TOC16_LO:
6900 case R_PPC64_TOC16_HI:
6901 case R_PPC64_TOC16_HA:
6902 case R_PPC64_TOC16_DS:
6903 case R_PPC64_TOC16_LO_DS:
6904 /* In case we're taking addresses of toc entries. */
6905 case R_PPC64_ADDR64:
6906 break;
6907
6908 default:
6909 continue;
6910 }
6911
6912 r_symndx = ELF64_R_SYM (rel->r_info);
6913 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6914 r_symndx, ibfd))
6915 {
6916 free (used);
6917 goto error_ret;
6918 }
6919
6920 if (sym_sec != toc)
6921 continue;
6922
6923 if (h != NULL)
6924 val = h->root.u.def.value;
6925 else
6926 val = sym->st_value;
6927 val += rel->r_addend;
6928
6929 if (val >= toc->size)
6930 continue;
6931
6932 /* For the toc section, we only mark as used if
6933 this entry itself isn't unused. */
6934 if (sec == toc
6935 && !used[val >> 3]
6936 && (used[rel->r_offset >> 3]
6937 || !skip[rel->r_offset >> 3]))
6938 /* Do all the relocs again, to catch reference
6939 chains. */
6940 repeat = 1;
6941
6942 used[val >> 3] = 1;
6943 }
6944 while (repeat);
6945 }
6946
6947 /* Merge the used and skip arrays. Assume that TOC
6948 doublewords not appearing as either used or unused belong
6949 to to an entry more than one doubleword in size. */
6950 for (drop = skip, keep = used, last = 0, some_unused = 0;
6951 drop < skip + (toc->size + 7) / 8;
6952 ++drop, ++keep)
6953 {
6954 if (*keep)
6955 {
6956 *drop = 0;
6957 last = 0;
6958 }
6959 else if (*drop)
6960 {
6961 some_unused = 1;
6962 last = 1;
6963 }
6964 else
6965 *drop = last;
6966 }
6967
6968 free (used);
6969
6970 if (some_unused)
6971 {
6972 bfd_byte *contents, *src;
6973 unsigned long off;
6974
6975 /* Shuffle the toc contents, and at the same time convert the
6976 skip array from booleans into offsets. */
6977 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
6978 goto error_ret;
6979
6980 elf_section_data (toc)->this_hdr.contents = contents;
6981
6982 for (src = contents, off = 0, drop = skip;
6983 src < contents + toc->size;
6984 src += 8, ++drop)
6985 {
6986 if (*drop)
6987 {
6988 *drop = (unsigned long) -1;
6989 off += 8;
6990 }
6991 else if (off != 0)
6992 {
6993 *drop = off;
6994 memcpy (src - off, src, 8);
6995 }
6996 }
6997 toc->rawsize = toc->size;
6998 toc->size = src - contents - off;
6999
7000 /* Read toc relocs. */
7001 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, TRUE);
7002 if (relstart == NULL)
7003 goto error_ret;
7004
7005 /* Remove unused toc relocs, and adjust those we keep. */
7006 wrel = relstart;
7007 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7008 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7009 {
7010 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7011 wrel->r_info = rel->r_info;
7012 wrel->r_addend = rel->r_addend;
7013 ++wrel;
7014 }
7015 toc->reloc_count = wrel - relstart;
7016 elf_section_data (toc)->rel_hdr.sh_size
7017 = toc->reloc_count * elf_section_data (toc)->rel_hdr.sh_entsize;
7018 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7019
7020 /* Adjust addends for relocs against the toc section sym. */
7021 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7022 {
7023 if (sec->reloc_count == 0
7024 || elf_discarded_section (sec))
7025 continue;
7026
7027 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7028 TRUE);
7029 if (relstart == NULL)
7030 goto error_ret;
7031
7032 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7033 {
7034 enum elf_ppc64_reloc_type r_type;
7035 unsigned long r_symndx;
7036 asection *sym_sec;
7037 struct elf_link_hash_entry *h;
7038 Elf_Internal_Sym *sym;
7039
7040 r_type = ELF64_R_TYPE (rel->r_info);
7041 switch (r_type)
7042 {
7043 default:
7044 continue;
7045
7046 case R_PPC64_TOC16:
7047 case R_PPC64_TOC16_LO:
7048 case R_PPC64_TOC16_HI:
7049 case R_PPC64_TOC16_HA:
7050 case R_PPC64_TOC16_DS:
7051 case R_PPC64_TOC16_LO_DS:
7052 case R_PPC64_ADDR64:
7053 break;
7054 }
7055
7056 r_symndx = ELF64_R_SYM (rel->r_info);
7057 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7058 r_symndx, ibfd))
7059 goto error_ret;
7060
7061 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7062 continue;
7063
7064 rel->r_addend -= skip[rel->r_addend >> 3];
7065 }
7066 }
7067
7068 /* We shouldn't have local or global symbols defined in the TOC,
7069 but handle them anyway. */
7070 if (local_syms != NULL)
7071 {
7072 Elf_Internal_Sym *sym;
7073
7074 for (sym = local_syms;
7075 sym < local_syms + symtab_hdr->sh_info;
7076 ++sym)
7077 if (sym->st_shndx != SHN_UNDEF
7078 && (sym->st_shndx < SHN_LORESERVE
7079 || sym->st_shndx > SHN_HIRESERVE)
7080 && sym->st_value != 0
7081 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7082 {
7083 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7084 sym->st_value -= skip[sym->st_value >> 3];
7085 else
7086 {
7087 (*_bfd_error_handler)
7088 (_("%s defined in removed toc entry"),
7089 bfd_elf_sym_name (ibfd, symtab_hdr, sym));
7090 sym->st_value = 0;
7091 sym->st_shndx = SHN_ABS;
7092 }
7093 symtab_hdr->contents = (unsigned char *) local_syms;
7094 }
7095 }
7096
7097 /* Finally, adjust any global syms defined in the toc. */
7098 if (toc_inf.global_toc_syms)
7099 {
7100 toc_inf.toc = toc;
7101 toc_inf.skip = skip;
7102 toc_inf.global_toc_syms = FALSE;
7103 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7104 &toc_inf);
7105 }
7106 }
7107
7108 if (local_syms != NULL
7109 && symtab_hdr->contents != (unsigned char *) local_syms)
7110 {
7111 if (!info->keep_memory)
7112 free (local_syms);
7113 else
7114 symtab_hdr->contents = (unsigned char *) local_syms;
7115 }
7116 free (skip);
7117 }
7118
7119 return TRUE;
7120 }
7121
7122 /* Allocate space in .plt, .got and associated reloc sections for
7123 dynamic relocs. */
7124
7125 static bfd_boolean
7126 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7127 {
7128 struct bfd_link_info *info;
7129 struct ppc_link_hash_table *htab;
7130 asection *s;
7131 struct ppc_link_hash_entry *eh;
7132 struct ppc_dyn_relocs *p;
7133 struct got_entry *gent;
7134
7135 if (h->root.type == bfd_link_hash_indirect)
7136 return TRUE;
7137
7138 if (h->root.type == bfd_link_hash_warning)
7139 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7140
7141 info = (struct bfd_link_info *) inf;
7142 htab = ppc_hash_table (info);
7143
7144 if (htab->elf.dynamic_sections_created
7145 && h->dynindx != -1
7146 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7147 {
7148 struct plt_entry *pent;
7149 bfd_boolean doneone = FALSE;
7150 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7151 if (pent->plt.refcount > 0)
7152 {
7153 /* If this is the first .plt entry, make room for the special
7154 first entry. */
7155 s = htab->plt;
7156 if (s->size == 0)
7157 s->size += PLT_INITIAL_ENTRY_SIZE;
7158
7159 pent->plt.offset = s->size;
7160
7161 /* Make room for this entry. */
7162 s->size += PLT_ENTRY_SIZE;
7163
7164 /* Make room for the .glink code. */
7165 s = htab->glink;
7166 if (s->size == 0)
7167 s->size += GLINK_CALL_STUB_SIZE;
7168 /* We need bigger stubs past index 32767. */
7169 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7170 s->size += 4;
7171 s->size += 2*4;
7172
7173 /* We also need to make an entry in the .rela.plt section. */
7174 s = htab->relplt;
7175 s->size += sizeof (Elf64_External_Rela);
7176 doneone = TRUE;
7177 }
7178 else
7179 pent->plt.offset = (bfd_vma) -1;
7180 if (!doneone)
7181 {
7182 h->plt.plist = NULL;
7183 h->needs_plt = 0;
7184 }
7185 }
7186 else
7187 {
7188 h->plt.plist = NULL;
7189 h->needs_plt = 0;
7190 }
7191
7192 eh = (struct ppc_link_hash_entry *) h;
7193 /* Run through the TLS GD got entries first if we're changing them
7194 to TPREL. */
7195 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7196 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7197 if (gent->got.refcount > 0
7198 && (gent->tls_type & TLS_GD) != 0)
7199 {
7200 /* This was a GD entry that has been converted to TPREL. If
7201 there happens to be a TPREL entry we can use that one. */
7202 struct got_entry *ent;
7203 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7204 if (ent->got.refcount > 0
7205 && (ent->tls_type & TLS_TPREL) != 0
7206 && ent->addend == gent->addend
7207 && ent->owner == gent->owner)
7208 {
7209 gent->got.refcount = 0;
7210 break;
7211 }
7212
7213 /* If not, then we'll be using our own TPREL entry. */
7214 if (gent->got.refcount != 0)
7215 gent->tls_type = TLS_TLS | TLS_TPREL;
7216 }
7217
7218 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7219 if (gent->got.refcount > 0)
7220 {
7221 bfd_boolean dyn;
7222
7223 /* Make sure this symbol is output as a dynamic symbol.
7224 Undefined weak syms won't yet be marked as dynamic,
7225 nor will all TLS symbols. */
7226 if (h->dynindx == -1
7227 && !h->forced_local)
7228 {
7229 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7230 return FALSE;
7231 }
7232
7233 if ((gent->tls_type & TLS_LD) != 0
7234 && !h->def_dynamic)
7235 {
7236 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7237 continue;
7238 }
7239
7240 s = ppc64_elf_tdata (gent->owner)->got;
7241 gent->got.offset = s->size;
7242 s->size
7243 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7244 dyn = htab->elf.dynamic_sections_created;
7245 if ((info->shared
7246 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7247 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7248 || h->root.type != bfd_link_hash_undefweak))
7249 ppc64_elf_tdata (gent->owner)->relgot->size
7250 += (gent->tls_type & eh->tls_mask & TLS_GD
7251 ? 2 * sizeof (Elf64_External_Rela)
7252 : sizeof (Elf64_External_Rela));
7253 }
7254 else
7255 gent->got.offset = (bfd_vma) -1;
7256
7257 if (eh->dyn_relocs == NULL)
7258 return TRUE;
7259
7260 /* In the shared -Bsymbolic case, discard space allocated for
7261 dynamic pc-relative relocs against symbols which turn out to be
7262 defined in regular objects. For the normal shared case, discard
7263 space for relocs that have become local due to symbol visibility
7264 changes. */
7265
7266 if (info->shared)
7267 {
7268 /* Relocs that use pc_count are those that appear on a call insn,
7269 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7270 generated via assembly. We want calls to protected symbols to
7271 resolve directly to the function rather than going via the plt.
7272 If people want function pointer comparisons to work as expected
7273 then they should avoid writing weird assembly. */
7274 if (SYMBOL_CALLS_LOCAL (info, h))
7275 {
7276 struct ppc_dyn_relocs **pp;
7277
7278 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7279 {
7280 p->count -= p->pc_count;
7281 p->pc_count = 0;
7282 if (p->count == 0)
7283 *pp = p->next;
7284 else
7285 pp = &p->next;
7286 }
7287 }
7288
7289 /* Also discard relocs on undefined weak syms with non-default
7290 visibility. */
7291 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7292 && h->root.type == bfd_link_hash_undefweak)
7293 eh->dyn_relocs = NULL;
7294 }
7295 else if (ELIMINATE_COPY_RELOCS)
7296 {
7297 /* For the non-shared case, discard space for relocs against
7298 symbols which turn out to need copy relocs or are not
7299 dynamic. */
7300
7301 if (!h->non_got_ref
7302 && h->def_dynamic
7303 && !h->def_regular)
7304 {
7305 /* Make sure this symbol is output as a dynamic symbol.
7306 Undefined weak syms won't yet be marked as dynamic. */
7307 if (h->dynindx == -1
7308 && !h->forced_local)
7309 {
7310 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7311 return FALSE;
7312 }
7313
7314 /* If that succeeded, we know we'll be keeping all the
7315 relocs. */
7316 if (h->dynindx != -1)
7317 goto keep;
7318 }
7319
7320 eh->dyn_relocs = NULL;
7321
7322 keep: ;
7323 }
7324
7325 /* Finally, allocate space. */
7326 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7327 {
7328 asection *sreloc = elf_section_data (p->sec)->sreloc;
7329 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7330 }
7331
7332 return TRUE;
7333 }
7334
7335 /* Find any dynamic relocs that apply to read-only sections. */
7336
7337 static bfd_boolean
7338 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7339 {
7340 struct ppc_link_hash_entry *eh;
7341 struct ppc_dyn_relocs *p;
7342
7343 if (h->root.type == bfd_link_hash_warning)
7344 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7345
7346 eh = (struct ppc_link_hash_entry *) h;
7347 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7348 {
7349 asection *s = p->sec->output_section;
7350
7351 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7352 {
7353 struct bfd_link_info *info = inf;
7354
7355 info->flags |= DF_TEXTREL;
7356
7357 /* Not an error, just cut short the traversal. */
7358 return FALSE;
7359 }
7360 }
7361 return TRUE;
7362 }
7363
7364 /* Set the sizes of the dynamic sections. */
7365
7366 static bfd_boolean
7367 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7368 struct bfd_link_info *info)
7369 {
7370 struct ppc_link_hash_table *htab;
7371 bfd *dynobj;
7372 asection *s;
7373 bfd_boolean relocs;
7374 bfd *ibfd;
7375
7376 htab = ppc_hash_table (info);
7377 dynobj = htab->elf.dynobj;
7378 if (dynobj == NULL)
7379 abort ();
7380
7381 if (htab->elf.dynamic_sections_created)
7382 {
7383 /* Set the contents of the .interp section to the interpreter. */
7384 if (info->executable)
7385 {
7386 s = bfd_get_section_by_name (dynobj, ".interp");
7387 if (s == NULL)
7388 abort ();
7389 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7390 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7391 }
7392 }
7393
7394 /* Set up .got offsets for local syms, and space for local dynamic
7395 relocs. */
7396 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7397 {
7398 struct got_entry **lgot_ents;
7399 struct got_entry **end_lgot_ents;
7400 char *lgot_masks;
7401 bfd_size_type locsymcount;
7402 Elf_Internal_Shdr *symtab_hdr;
7403 asection *srel;
7404
7405 if (!is_ppc64_elf_target (ibfd->xvec))
7406 continue;
7407
7408 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7409 {
7410 s = ppc64_elf_tdata (ibfd)->got;
7411 ppc64_tlsld_got (ibfd)->offset = s->size;
7412 s->size += 16;
7413 if (info->shared)
7414 {
7415 srel = ppc64_elf_tdata (ibfd)->relgot;
7416 srel->size += sizeof (Elf64_External_Rela);
7417 }
7418 }
7419 else
7420 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7421
7422 for (s = ibfd->sections; s != NULL; s = s->next)
7423 {
7424 struct ppc_dyn_relocs *p;
7425
7426 for (p = *((struct ppc_dyn_relocs **)
7427 &elf_section_data (s)->local_dynrel);
7428 p != NULL;
7429 p = p->next)
7430 {
7431 if (!bfd_is_abs_section (p->sec)
7432 && bfd_is_abs_section (p->sec->output_section))
7433 {
7434 /* Input section has been discarded, either because
7435 it is a copy of a linkonce section or due to
7436 linker script /DISCARD/, so we'll be discarding
7437 the relocs too. */
7438 }
7439 else if (p->count != 0)
7440 {
7441 srel = elf_section_data (p->sec)->sreloc;
7442 srel->size += p->count * sizeof (Elf64_External_Rela);
7443 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7444 info->flags |= DF_TEXTREL;
7445 }
7446 }
7447 }
7448
7449 lgot_ents = elf_local_got_ents (ibfd);
7450 if (!lgot_ents)
7451 continue;
7452
7453 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7454 locsymcount = symtab_hdr->sh_info;
7455 end_lgot_ents = lgot_ents + locsymcount;
7456 lgot_masks = (char *) end_lgot_ents;
7457 s = ppc64_elf_tdata (ibfd)->got;
7458 srel = ppc64_elf_tdata (ibfd)->relgot;
7459 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7460 {
7461 struct got_entry *ent;
7462
7463 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7464 if (ent->got.refcount > 0)
7465 {
7466 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7467 {
7468 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7469 {
7470 ppc64_tlsld_got (ibfd)->offset = s->size;
7471 s->size += 16;
7472 if (info->shared)
7473 srel->size += sizeof (Elf64_External_Rela);
7474 }
7475 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7476 }
7477 else
7478 {
7479 ent->got.offset = s->size;
7480 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7481 {
7482 s->size += 16;
7483 if (info->shared)
7484 srel->size += 2 * sizeof (Elf64_External_Rela);
7485 }
7486 else
7487 {
7488 s->size += 8;
7489 if (info->shared)
7490 srel->size += sizeof (Elf64_External_Rela);
7491 }
7492 }
7493 }
7494 else
7495 ent->got.offset = (bfd_vma) -1;
7496 }
7497 }
7498
7499 /* Allocate global sym .plt and .got entries, and space for global
7500 sym dynamic relocs. */
7501 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7502
7503 /* We now have determined the sizes of the various dynamic sections.
7504 Allocate memory for them. */
7505 relocs = FALSE;
7506 for (s = dynobj->sections; s != NULL; s = s->next)
7507 {
7508 if ((s->flags & SEC_LINKER_CREATED) == 0)
7509 continue;
7510
7511 if (s == htab->brlt || s == htab->relbrlt)
7512 /* These haven't been allocated yet; don't strip. */
7513 continue;
7514 else if (s == htab->got
7515 || s == htab->plt
7516 || s == htab->glink)
7517 {
7518 /* Strip this section if we don't need it; see the
7519 comment below. */
7520 }
7521 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7522 {
7523 if (s->size == 0)
7524 {
7525 /* If we don't need this section, strip it from the
7526 output file. This is mostly to handle .rela.bss and
7527 .rela.plt. We must create both sections in
7528 create_dynamic_sections, because they must be created
7529 before the linker maps input sections to output
7530 sections. The linker does that before
7531 adjust_dynamic_symbol is called, and it is that
7532 function which decides whether anything needs to go
7533 into these sections. */
7534 }
7535 else
7536 {
7537 if (s != htab->relplt)
7538 relocs = TRUE;
7539
7540 /* We use the reloc_count field as a counter if we need
7541 to copy relocs into the output file. */
7542 s->reloc_count = 0;
7543 }
7544 }
7545 else
7546 {
7547 /* It's not one of our sections, so don't allocate space. */
7548 continue;
7549 }
7550
7551 if (s->size == 0)
7552 {
7553 _bfd_strip_section_from_output (info, s);
7554 continue;
7555 }
7556
7557 /* .plt is in the bss section. We don't initialise it. */
7558 if (s == htab->plt)
7559 continue;
7560
7561 /* Allocate memory for the section contents. We use bfd_zalloc
7562 here in case unused entries are not reclaimed before the
7563 section's contents are written out. This should not happen,
7564 but this way if it does we get a R_PPC64_NONE reloc in .rela
7565 sections instead of garbage.
7566 We also rely on the section contents being zero when writing
7567 the GOT. */
7568 s->contents = bfd_zalloc (dynobj, s->size);
7569 if (s->contents == NULL)
7570 return FALSE;
7571 }
7572
7573 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7574 {
7575 if (!is_ppc64_elf_target (ibfd->xvec))
7576 continue;
7577
7578 s = ppc64_elf_tdata (ibfd)->got;
7579 if (s != NULL && s != htab->got)
7580 {
7581 if (s->size == 0)
7582 _bfd_strip_section_from_output (info, s);
7583 else
7584 {
7585 s->contents = bfd_zalloc (ibfd, s->size);
7586 if (s->contents == NULL)
7587 return FALSE;
7588 }
7589 }
7590 s = ppc64_elf_tdata (ibfd)->relgot;
7591 if (s != NULL)
7592 {
7593 if (s->size == 0)
7594 _bfd_strip_section_from_output (info, s);
7595 else
7596 {
7597 s->contents = bfd_zalloc (ibfd, s->size);
7598 if (s->contents == NULL)
7599 return FALSE;
7600 relocs = TRUE;
7601 s->reloc_count = 0;
7602 }
7603 }
7604 }
7605
7606 if (htab->elf.dynamic_sections_created)
7607 {
7608 /* Add some entries to the .dynamic section. We fill in the
7609 values later, in ppc64_elf_finish_dynamic_sections, but we
7610 must add the entries now so that we get the correct size for
7611 the .dynamic section. The DT_DEBUG entry is filled in by the
7612 dynamic linker and used by the debugger. */
7613 #define add_dynamic_entry(TAG, VAL) \
7614 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7615
7616 if (info->executable)
7617 {
7618 if (!add_dynamic_entry (DT_DEBUG, 0))
7619 return FALSE;
7620 }
7621
7622 if (htab->plt != NULL && htab->plt->size != 0)
7623 {
7624 if (!add_dynamic_entry (DT_PLTGOT, 0)
7625 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7626 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7627 || !add_dynamic_entry (DT_JMPREL, 0)
7628 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7629 return FALSE;
7630 }
7631
7632 if (NO_OPD_RELOCS)
7633 {
7634 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7635 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7636 return FALSE;
7637 }
7638
7639 if (relocs)
7640 {
7641 if (!add_dynamic_entry (DT_RELA, 0)
7642 || !add_dynamic_entry (DT_RELASZ, 0)
7643 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7644 return FALSE;
7645
7646 /* If any dynamic relocs apply to a read-only section,
7647 then we need a DT_TEXTREL entry. */
7648 if ((info->flags & DF_TEXTREL) == 0)
7649 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7650
7651 if ((info->flags & DF_TEXTREL) != 0)
7652 {
7653 if (!add_dynamic_entry (DT_TEXTREL, 0))
7654 return FALSE;
7655 }
7656 }
7657 }
7658 #undef add_dynamic_entry
7659
7660 return TRUE;
7661 }
7662
7663 /* Determine the type of stub needed, if any, for a call. */
7664
7665 static inline enum ppc_stub_type
7666 ppc_type_of_stub (asection *input_sec,
7667 const Elf_Internal_Rela *rel,
7668 struct ppc_link_hash_entry **hash,
7669 bfd_vma destination)
7670 {
7671 struct ppc_link_hash_entry *h = *hash;
7672 bfd_vma location;
7673 bfd_vma branch_offset;
7674 bfd_vma max_branch_offset;
7675 enum elf_ppc64_reloc_type r_type;
7676
7677 if (h != NULL)
7678 {
7679 if (h->oh != NULL
7680 && h->oh->is_func_descriptor)
7681 h = h->oh;
7682
7683 if (h->elf.dynindx != -1)
7684 {
7685 struct plt_entry *ent;
7686
7687 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7688 if (ent->addend == rel->r_addend
7689 && ent->plt.offset != (bfd_vma) -1)
7690 {
7691 *hash = h;
7692 return ppc_stub_plt_call;
7693 }
7694 }
7695
7696 if (!(h->elf.root.type == bfd_link_hash_defined
7697 || h->elf.root.type == bfd_link_hash_defweak)
7698 || h->elf.root.u.def.section->output_section == NULL)
7699 return ppc_stub_none;
7700 }
7701
7702 /* Determine where the call point is. */
7703 location = (input_sec->output_offset
7704 + input_sec->output_section->vma
7705 + rel->r_offset);
7706
7707 branch_offset = destination - location;
7708 r_type = ELF64_R_TYPE (rel->r_info);
7709
7710 /* Determine if a long branch stub is needed. */
7711 max_branch_offset = 1 << 25;
7712 if (r_type != R_PPC64_REL24)
7713 max_branch_offset = 1 << 15;
7714
7715 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7716 /* We need a stub. Figure out whether a long_branch or plt_branch
7717 is needed later. */
7718 return ppc_stub_long_branch;
7719
7720 return ppc_stub_none;
7721 }
7722
7723 /* Build a .plt call stub. */
7724
7725 static inline bfd_byte *
7726 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7727 {
7728 #define PPC_LO(v) ((v) & 0xffff)
7729 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7730 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7731
7732 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7733 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7734 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7735 if (PPC_HA (offset + 8) != PPC_HA (offset))
7736 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7737 offset += 8;
7738 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7739 if (PPC_HA (offset + 8) != PPC_HA (offset))
7740 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7741 offset += 8;
7742 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7743 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7744 bfd_put_32 (obfd, BCTR, p), p += 4;
7745 return p;
7746 }
7747
7748 static bfd_boolean
7749 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7750 {
7751 struct ppc_stub_hash_entry *stub_entry;
7752 struct ppc_branch_hash_entry *br_entry;
7753 struct bfd_link_info *info;
7754 struct ppc_link_hash_table *htab;
7755 bfd_byte *loc;
7756 bfd_byte *p;
7757 unsigned int indx;
7758 struct plt_entry *ent;
7759 bfd_vma dest, off;
7760 int size;
7761
7762 /* Massage our args to the form they really have. */
7763 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7764 info = in_arg;
7765
7766 htab = ppc_hash_table (info);
7767
7768 /* Make a note of the offset within the stubs for this entry. */
7769 stub_entry->stub_offset = stub_entry->stub_sec->size;
7770 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7771
7772 htab->stub_count[stub_entry->stub_type - 1] += 1;
7773 switch (stub_entry->stub_type)
7774 {
7775 case ppc_stub_long_branch:
7776 case ppc_stub_long_branch_r2off:
7777 /* Branches are relative. This is where we are going to. */
7778 off = dest = (stub_entry->target_value
7779 + stub_entry->target_section->output_offset
7780 + stub_entry->target_section->output_section->vma);
7781
7782 /* And this is where we are coming from. */
7783 off -= (stub_entry->stub_offset
7784 + stub_entry->stub_sec->output_offset
7785 + stub_entry->stub_sec->output_section->vma);
7786
7787 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7788 size = 4;
7789 else
7790 {
7791 bfd_vma r2off;
7792
7793 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7794 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7795 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7796 loc += 4;
7797 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7798 loc += 4;
7799 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7800 loc += 4;
7801 off -= 12;
7802 size = 16;
7803 }
7804 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7805
7806 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7807
7808 if (info->emitrelocations)
7809 {
7810 Elf_Internal_Rela *relocs, *r;
7811 struct bfd_elf_section_data *elfsec_data;
7812
7813 elfsec_data = elf_section_data (stub_entry->stub_sec);
7814 relocs = elfsec_data->relocs;
7815 if (relocs == NULL)
7816 {
7817 bfd_size_type relsize;
7818 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
7819 relocs = bfd_alloc (htab->stub_bfd, relsize);
7820 if (relocs == NULL)
7821 return FALSE;
7822 elfsec_data->relocs = relocs;
7823 elfsec_data->rel_hdr.sh_size = relsize;
7824 elfsec_data->rel_hdr.sh_entsize = 24;
7825 stub_entry->stub_sec->reloc_count = 0;
7826 }
7827 r = relocs + stub_entry->stub_sec->reloc_count;
7828 stub_entry->stub_sec->reloc_count += 1;
7829 r->r_offset = loc - stub_entry->stub_sec->contents;
7830 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
7831 r->r_addend = dest;
7832 if (stub_entry->h != NULL)
7833 {
7834 struct elf_link_hash_entry **hashes;
7835 unsigned long symndx;
7836 struct ppc_link_hash_entry *h;
7837
7838 hashes = elf_sym_hashes (htab->stub_bfd);
7839 if (hashes == NULL)
7840 {
7841 bfd_size_type hsize;
7842
7843 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
7844 hashes = bfd_zalloc (htab->stub_bfd, hsize);
7845 if (hashes == NULL)
7846 return FALSE;
7847 elf_sym_hashes (htab->stub_bfd) = hashes;
7848 htab->stub_globals = 1;
7849 }
7850 symndx = htab->stub_globals++;
7851 h = stub_entry->h;
7852 hashes[symndx] = &h->elf;
7853 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
7854 if (h->oh != NULL && h->oh->is_func)
7855 h = h->oh;
7856 if (h->elf.root.u.def.section != stub_entry->target_section)
7857 /* H is an opd symbol. The addend must be zero. */
7858 r->r_addend = 0;
7859 else
7860 {
7861 off = (h->elf.root.u.def.value
7862 + h->elf.root.u.def.section->output_offset
7863 + h->elf.root.u.def.section->output_section->vma);
7864 r->r_addend -= off;
7865 }
7866 }
7867 }
7868 break;
7869
7870 case ppc_stub_plt_branch:
7871 case ppc_stub_plt_branch_r2off:
7872 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7873 stub_entry->root.string + 9,
7874 FALSE, FALSE);
7875 if (br_entry == NULL)
7876 {
7877 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
7878 stub_entry->root.string + 9);
7879 htab->stub_error = TRUE;
7880 return FALSE;
7881 }
7882
7883 off = (stub_entry->target_value
7884 + stub_entry->target_section->output_offset
7885 + stub_entry->target_section->output_section->vma);
7886
7887 bfd_put_64 (htab->brlt->owner, off,
7888 htab->brlt->contents + br_entry->offset);
7889
7890 if (htab->relbrlt != NULL)
7891 {
7892 /* Create a reloc for the branch lookup table entry. */
7893 Elf_Internal_Rela rela;
7894 bfd_byte *rl;
7895
7896 rela.r_offset = (br_entry->offset
7897 + htab->brlt->output_offset
7898 + htab->brlt->output_section->vma);
7899 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
7900 rela.r_addend = off;
7901
7902 rl = htab->relbrlt->contents;
7903 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
7904 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
7905 }
7906
7907 off = (br_entry->offset
7908 + htab->brlt->output_offset
7909 + htab->brlt->output_section->vma
7910 - elf_gp (htab->brlt->output_section->owner)
7911 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7912
7913 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7914 {
7915 (*_bfd_error_handler)
7916 (_("linkage table error against `%s'"),
7917 stub_entry->root.string);
7918 bfd_set_error (bfd_error_bad_value);
7919 htab->stub_error = TRUE;
7920 return FALSE;
7921 }
7922
7923 indx = off;
7924 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
7925 {
7926 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7927 loc += 4;
7928 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7929 size = 16;
7930 }
7931 else
7932 {
7933 bfd_vma r2off;
7934
7935 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7936 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7937 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7938 loc += 4;
7939 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7940 loc += 4;
7941 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7942 loc += 4;
7943 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7944 loc += 4;
7945 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7946 size = 28;
7947 }
7948 loc += 4;
7949 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
7950 loc += 4;
7951 bfd_put_32 (htab->stub_bfd, BCTR, loc);
7952 break;
7953
7954 case ppc_stub_plt_call:
7955 /* Do the best we can for shared libraries built without
7956 exporting ".foo" for each "foo". This can happen when symbol
7957 versioning scripts strip all bar a subset of symbols. */
7958 if (stub_entry->h->oh != NULL
7959 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
7960 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
7961 {
7962 /* Point the symbol at the stub. There may be multiple stubs,
7963 we don't really care; The main thing is to make this sym
7964 defined somewhere. Maybe defining the symbol in the stub
7965 section is a silly idea. If we didn't do this, htab->top_id
7966 could disappear. */
7967 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
7968 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
7969 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
7970 }
7971
7972 /* Now build the stub. */
7973 off = (bfd_vma) -1;
7974 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
7975 if (ent->addend == stub_entry->addend)
7976 {
7977 off = ent->plt.offset;
7978 break;
7979 }
7980 if (off >= (bfd_vma) -2)
7981 abort ();
7982
7983 off &= ~ (bfd_vma) 1;
7984 off += (htab->plt->output_offset
7985 + htab->plt->output_section->vma
7986 - elf_gp (htab->plt->output_section->owner)
7987 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7988
7989 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7990 {
7991 (*_bfd_error_handler)
7992 (_("linkage table error against `%s'"),
7993 stub_entry->h->elf.root.root.string);
7994 bfd_set_error (bfd_error_bad_value);
7995 htab->stub_error = TRUE;
7996 return FALSE;
7997 }
7998
7999 p = build_plt_stub (htab->stub_bfd, loc, off);
8000 size = p - loc;
8001 break;
8002
8003 default:
8004 BFD_FAIL ();
8005 return FALSE;
8006 }
8007
8008 stub_entry->stub_sec->size += size;
8009
8010 if (htab->emit_stub_syms)
8011 {
8012 struct elf_link_hash_entry *h;
8013 size_t len1, len2;
8014 char *name;
8015 const char *const stub_str[] = { "long_branch",
8016 "long_branch_r2off",
8017 "plt_branch",
8018 "plt_branch_r2off",
8019 "plt_call" };
8020
8021 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8022 len2 = strlen (stub_entry->root.string);
8023 name = bfd_malloc (len1 + len2 + 2);
8024 if (name == NULL)
8025 return FALSE;
8026 memcpy (name, stub_entry->root.string, 9);
8027 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8028 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8029 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8030 if (h == NULL)
8031 return FALSE;
8032 if (h->root.type == bfd_link_hash_new)
8033 {
8034 h->root.type = bfd_link_hash_defined;
8035 h->root.u.def.section = stub_entry->stub_sec;
8036 h->root.u.def.value = stub_entry->stub_offset;
8037 h->ref_regular = 1;
8038 h->def_regular = 1;
8039 h->ref_regular_nonweak = 1;
8040 h->forced_local = 1;
8041 h->non_elf = 0;
8042 }
8043 }
8044
8045 return TRUE;
8046 }
8047
8048 /* As above, but don't actually build the stub. Just bump offset so
8049 we know stub section sizes, and select plt_branch stubs where
8050 long_branch stubs won't do. */
8051
8052 static bfd_boolean
8053 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8054 {
8055 struct ppc_stub_hash_entry *stub_entry;
8056 struct bfd_link_info *info;
8057 struct ppc_link_hash_table *htab;
8058 bfd_vma off;
8059 int size;
8060
8061 /* Massage our args to the form they really have. */
8062 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8063 info = in_arg;
8064
8065 htab = ppc_hash_table (info);
8066
8067 if (stub_entry->stub_type == ppc_stub_plt_call)
8068 {
8069 struct plt_entry *ent;
8070 off = (bfd_vma) -1;
8071 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8072 if (ent->addend == stub_entry->addend)
8073 {
8074 off = ent->plt.offset & ~(bfd_vma) 1;
8075 break;
8076 }
8077 if (off >= (bfd_vma) -2)
8078 abort ();
8079 off += (htab->plt->output_offset
8080 + htab->plt->output_section->vma
8081 - elf_gp (htab->plt->output_section->owner)
8082 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8083
8084 size = PLT_CALL_STUB_SIZE;
8085 if (PPC_HA (off + 16) != PPC_HA (off))
8086 size += 4;
8087 }
8088 else
8089 {
8090 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8091 variants. */
8092 off = (stub_entry->target_value
8093 + stub_entry->target_section->output_offset
8094 + stub_entry->target_section->output_section->vma);
8095 off -= (stub_entry->stub_sec->size
8096 + stub_entry->stub_sec->output_offset
8097 + stub_entry->stub_sec->output_section->vma);
8098
8099 /* Reset the stub type from the plt variant in case we now
8100 can reach with a shorter stub. */
8101 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8102 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8103
8104 size = 4;
8105 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8106 {
8107 off -= 12;
8108 size = 16;
8109 }
8110
8111 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8112 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8113 {
8114 struct ppc_branch_hash_entry *br_entry;
8115
8116 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8117 stub_entry->root.string + 9,
8118 TRUE, FALSE);
8119 if (br_entry == NULL)
8120 {
8121 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8122 stub_entry->root.string + 9);
8123 htab->stub_error = TRUE;
8124 return FALSE;
8125 }
8126
8127 if (br_entry->iter != htab->stub_iteration)
8128 {
8129 br_entry->iter = htab->stub_iteration;
8130 br_entry->offset = htab->brlt->size;
8131 htab->brlt->size += 8;
8132
8133 if (htab->relbrlt != NULL)
8134 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8135 }
8136
8137 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8138 size = 16;
8139 if (stub_entry->stub_type != ppc_stub_plt_branch)
8140 size = 28;
8141 }
8142
8143 if (info->emitrelocations
8144 && (stub_entry->stub_type == ppc_stub_long_branch
8145 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8146 stub_entry->stub_sec->reloc_count += 1;
8147 }
8148
8149 stub_entry->stub_sec->size += size;
8150 return TRUE;
8151 }
8152
8153 /* Set up various things so that we can make a list of input sections
8154 for each output section included in the link. Returns -1 on error,
8155 0 when no stubs will be needed, and 1 on success. */
8156
8157 int
8158 ppc64_elf_setup_section_lists (bfd *output_bfd,
8159 struct bfd_link_info *info,
8160 int no_multi_toc)
8161 {
8162 bfd *input_bfd;
8163 int top_id, top_index, id;
8164 asection *section;
8165 asection **input_list;
8166 bfd_size_type amt;
8167 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8168
8169 htab->no_multi_toc = no_multi_toc;
8170
8171 if (htab->brlt == NULL)
8172 return 0;
8173
8174 /* Find the top input section id. */
8175 for (input_bfd = info->input_bfds, top_id = 3;
8176 input_bfd != NULL;
8177 input_bfd = input_bfd->link_next)
8178 {
8179 for (section = input_bfd->sections;
8180 section != NULL;
8181 section = section->next)
8182 {
8183 if (top_id < section->id)
8184 top_id = section->id;
8185 }
8186 }
8187
8188 htab->top_id = top_id;
8189 amt = sizeof (struct map_stub) * (top_id + 1);
8190 htab->stub_group = bfd_zmalloc (amt);
8191 if (htab->stub_group == NULL)
8192 return -1;
8193
8194 /* Set toc_off for com, und, abs and ind sections. */
8195 for (id = 0; id < 3; id++)
8196 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8197
8198 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8199
8200 /* We can't use output_bfd->section_count here to find the top output
8201 section index as some sections may have been removed, and
8202 _bfd_strip_section_from_output doesn't renumber the indices. */
8203 for (section = output_bfd->sections, top_index = 0;
8204 section != NULL;
8205 section = section->next)
8206 {
8207 if (top_index < section->index)
8208 top_index = section->index;
8209 }
8210
8211 htab->top_index = top_index;
8212 amt = sizeof (asection *) * (top_index + 1);
8213 input_list = bfd_zmalloc (amt);
8214 htab->input_list = input_list;
8215 if (input_list == NULL)
8216 return -1;
8217
8218 return 1;
8219 }
8220
8221 /* The linker repeatedly calls this function for each TOC input section
8222 and linker generated GOT section. Group input bfds such that the toc
8223 within a group is less than 64k in size. Will break with cute linker
8224 scripts that play games with dot in the output toc section. */
8225
8226 void
8227 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8228 {
8229 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8230
8231 if (!htab->no_multi_toc)
8232 {
8233 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8234 bfd_vma off = addr - htab->toc_curr;
8235
8236 if (off + isec->size > 0x10000)
8237 htab->toc_curr = addr;
8238
8239 elf_gp (isec->owner) = (htab->toc_curr
8240 - elf_gp (isec->output_section->owner)
8241 + TOC_BASE_OFF);
8242 }
8243 }
8244
8245 /* Called after the last call to the above function. */
8246
8247 void
8248 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8249 {
8250 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8251
8252 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8253
8254 /* toc_curr tracks the TOC offset used for code sections below in
8255 ppc64_elf_next_input_section. Start off at 0x8000. */
8256 htab->toc_curr = TOC_BASE_OFF;
8257 }
8258
8259 /* No toc references were found in ISEC. If the code in ISEC makes no
8260 calls, then there's no need to use toc adjusting stubs when branching
8261 into ISEC. Actually, indirect calls from ISEC are OK as they will
8262 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8263 needed, and 2 if a cyclical call-graph was found but no other reason
8264 for a stub was detected. If called from the top level, a return of
8265 2 means the same as a return of 0. */
8266
8267 static int
8268 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8269 {
8270 Elf_Internal_Rela *relstart, *rel;
8271 Elf_Internal_Sym *local_syms;
8272 int ret;
8273 struct ppc_link_hash_table *htab;
8274
8275 /* We know none of our code bearing sections will need toc stubs. */
8276 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8277 return 0;
8278
8279 if (isec->size == 0)
8280 return 0;
8281
8282 if (isec->output_section == NULL)
8283 return 0;
8284
8285 /* Hack for linux kernel. .fixup contains branches, but only back to
8286 the function that hit an exception. */
8287 if (strcmp (isec->name, ".fixup") == 0)
8288 return 0;
8289
8290 if (isec->reloc_count == 0)
8291 return 0;
8292
8293 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8294 info->keep_memory);
8295 if (relstart == NULL)
8296 return -1;
8297
8298 /* Look for branches to outside of this section. */
8299 local_syms = NULL;
8300 ret = 0;
8301 htab = ppc_hash_table (info);
8302 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8303 {
8304 enum elf_ppc64_reloc_type r_type;
8305 unsigned long r_symndx;
8306 struct elf_link_hash_entry *h;
8307 Elf_Internal_Sym *sym;
8308 asection *sym_sec;
8309 long *opd_adjust;
8310 bfd_vma sym_value;
8311 bfd_vma dest;
8312
8313 r_type = ELF64_R_TYPE (rel->r_info);
8314 if (r_type != R_PPC64_REL24
8315 && r_type != R_PPC64_REL14
8316 && r_type != R_PPC64_REL14_BRTAKEN
8317 && r_type != R_PPC64_REL14_BRNTAKEN)
8318 continue;
8319
8320 r_symndx = ELF64_R_SYM (rel->r_info);
8321 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8322 isec->owner))
8323 {
8324 ret = -1;
8325 break;
8326 }
8327
8328 /* Ignore branches to undefined syms. */
8329 if (sym_sec == NULL)
8330 continue;
8331
8332 /* Calls to dynamic lib functions go through a plt call stub
8333 that uses r2. Assume branches to other sections not included
8334 in the link need stubs too, to cover -R and absolute syms. */
8335 if (sym_sec->output_section == NULL)
8336 {
8337 ret = 1;
8338 break;
8339 }
8340
8341 if (h == NULL)
8342 sym_value = sym->st_value;
8343 else
8344 {
8345 if (h->root.type != bfd_link_hash_defined
8346 && h->root.type != bfd_link_hash_defweak)
8347 abort ();
8348 sym_value = h->root.u.def.value;
8349 }
8350 sym_value += rel->r_addend;
8351
8352 /* If this branch reloc uses an opd sym, find the code section. */
8353 opd_adjust = get_opd_info (sym_sec);
8354 if (opd_adjust != NULL)
8355 {
8356
8357 if (h == NULL)
8358 {
8359 long adjust;
8360
8361 adjust = opd_adjust[sym->st_value / 8];
8362 if (adjust == -1)
8363 /* Assume deleted functions won't ever be called. */
8364 continue;
8365 sym_value += adjust;
8366 }
8367
8368 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8369 if (dest == (bfd_vma) -1)
8370 continue;
8371 }
8372 else
8373 dest = (sym_value
8374 + sym_sec->output_offset
8375 + sym_sec->output_section->vma);
8376
8377 /* Ignore branch to self. */
8378 if (sym_sec == isec)
8379 continue;
8380
8381 /* If the called function uses the toc, we need a stub. */
8382 if (sym_sec->has_toc_reloc
8383 || sym_sec->makes_toc_func_call)
8384 {
8385 ret = 1;
8386 break;
8387 }
8388
8389 /* Assume any branch that needs a long branch stub might in fact
8390 need a plt_branch stub. A plt_branch stub uses r2. */
8391 else if (dest - (isec->output_offset
8392 + isec->output_section->vma
8393 + rel->r_offset) + (1 << 25) >= (2 << 25))
8394 {
8395 ret = 1;
8396 break;
8397 }
8398
8399 /* If calling back to a section in the process of being tested, we
8400 can't say for sure that no toc adjusting stubs are needed, so
8401 don't return zero. */
8402 else if (sym_sec->call_check_in_progress)
8403 ret = 2;
8404
8405 /* Branches to another section that itself doesn't have any TOC
8406 references are OK. Recursively call ourselves to check. */
8407 else if (sym_sec->id <= htab->top_id
8408 && htab->stub_group[sym_sec->id].toc_off == 0)
8409 {
8410 int recur;
8411
8412 /* Mark current section as indeterminate, so that other
8413 sections that call back to current won't be marked as
8414 known. */
8415 isec->call_check_in_progress = 1;
8416 recur = toc_adjusting_stub_needed (info, sym_sec);
8417 isec->call_check_in_progress = 0;
8418
8419 if (recur < 0)
8420 {
8421 /* An error. Exit. */
8422 ret = -1;
8423 break;
8424 }
8425 else if (recur <= 1)
8426 {
8427 /* Known result. Mark as checked and set section flag. */
8428 htab->stub_group[sym_sec->id].toc_off = 1;
8429 if (recur != 0)
8430 {
8431 sym_sec->makes_toc_func_call = 1;
8432 ret = 1;
8433 break;
8434 }
8435 }
8436 else
8437 {
8438 /* Unknown result. Continue checking. */
8439 ret = 2;
8440 }
8441 }
8442 }
8443
8444 if (local_syms != NULL
8445 && (elf_tdata (isec->owner)->symtab_hdr.contents
8446 != (unsigned char *) local_syms))
8447 free (local_syms);
8448 if (elf_section_data (isec)->relocs != relstart)
8449 free (relstart);
8450
8451 return ret;
8452 }
8453
8454 /* The linker repeatedly calls this function for each input section,
8455 in the order that input sections are linked into output sections.
8456 Build lists of input sections to determine groupings between which
8457 we may insert linker stubs. */
8458
8459 bfd_boolean
8460 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8461 {
8462 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8463
8464 if ((isec->output_section->flags & SEC_CODE) != 0
8465 && isec->output_section->index <= htab->top_index)
8466 {
8467 asection **list = htab->input_list + isec->output_section->index;
8468 /* Steal the link_sec pointer for our list. */
8469 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8470 /* This happens to make the list in reverse order,
8471 which is what we want. */
8472 PREV_SEC (isec) = *list;
8473 *list = isec;
8474 }
8475
8476 if (htab->multi_toc_needed)
8477 {
8478 /* If a code section has a function that uses the TOC then we need
8479 to use the right TOC (obviously). Also, make sure that .opd gets
8480 the correct TOC value for R_PPC64_TOC relocs that don't have or
8481 can't find their function symbol (shouldn't ever happen now). */
8482 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8483 {
8484 if (elf_gp (isec->owner) != 0)
8485 htab->toc_curr = elf_gp (isec->owner);
8486 }
8487 else if (htab->stub_group[isec->id].toc_off == 0)
8488 {
8489 int ret = toc_adjusting_stub_needed (info, isec);
8490 if (ret < 0)
8491 return FALSE;
8492 else
8493 isec->makes_toc_func_call = ret & 1;
8494 }
8495 }
8496
8497 /* Functions that don't use the TOC can belong in any TOC group.
8498 Use the last TOC base. This happens to make _init and _fini
8499 pasting work. */
8500 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8501 return TRUE;
8502 }
8503
8504 /* See whether we can group stub sections together. Grouping stub
8505 sections may result in fewer stubs. More importantly, we need to
8506 put all .init* and .fini* stubs at the beginning of the .init or
8507 .fini output sections respectively, because glibc splits the
8508 _init and _fini functions into multiple parts. Putting a stub in
8509 the middle of a function is not a good idea. */
8510
8511 static void
8512 group_sections (struct ppc_link_hash_table *htab,
8513 bfd_size_type stub_group_size,
8514 bfd_boolean stubs_always_before_branch)
8515 {
8516 asection **list = htab->input_list + htab->top_index;
8517 do
8518 {
8519 asection *tail = *list;
8520 while (tail != NULL)
8521 {
8522 asection *curr;
8523 asection *prev;
8524 bfd_size_type total;
8525 bfd_boolean big_sec;
8526 bfd_vma curr_toc;
8527
8528 curr = tail;
8529 total = tail->size;
8530 big_sec = total >= stub_group_size;
8531 curr_toc = htab->stub_group[tail->id].toc_off;
8532
8533 while ((prev = PREV_SEC (curr)) != NULL
8534 && ((total += curr->output_offset - prev->output_offset)
8535 < stub_group_size)
8536 && htab->stub_group[prev->id].toc_off == curr_toc)
8537 curr = prev;
8538
8539 /* OK, the size from the start of CURR to the end is less
8540 than stub_group_size and thus can be handled by one stub
8541 section. (or the tail section is itself larger than
8542 stub_group_size, in which case we may be toast.) We
8543 should really be keeping track of the total size of stubs
8544 added here, as stubs contribute to the final output
8545 section size. That's a little tricky, and this way will
8546 only break if stubs added make the total size more than
8547 2^25, ie. for the default stub_group_size, if stubs total
8548 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8549 do
8550 {
8551 prev = PREV_SEC (tail);
8552 /* Set up this stub group. */
8553 htab->stub_group[tail->id].link_sec = curr;
8554 }
8555 while (tail != curr && (tail = prev) != NULL);
8556
8557 /* But wait, there's more! Input sections up to stub_group_size
8558 bytes before the stub section can be handled by it too.
8559 Don't do this if we have a really large section after the
8560 stubs, as adding more stubs increases the chance that
8561 branches may not reach into the stub section. */
8562 if (!stubs_always_before_branch && !big_sec)
8563 {
8564 total = 0;
8565 while (prev != NULL
8566 && ((total += tail->output_offset - prev->output_offset)
8567 < stub_group_size)
8568 && htab->stub_group[prev->id].toc_off == curr_toc)
8569 {
8570 tail = prev;
8571 prev = PREV_SEC (tail);
8572 htab->stub_group[tail->id].link_sec = curr;
8573 }
8574 }
8575 tail = prev;
8576 }
8577 }
8578 while (list-- != htab->input_list);
8579 free (htab->input_list);
8580 #undef PREV_SEC
8581 }
8582
8583 /* Determine and set the size of the stub section for a final link.
8584
8585 The basic idea here is to examine all the relocations looking for
8586 PC-relative calls to a target that is unreachable with a "bl"
8587 instruction. */
8588
8589 bfd_boolean
8590 ppc64_elf_size_stubs (bfd *output_bfd,
8591 struct bfd_link_info *info,
8592 bfd_signed_vma group_size,
8593 asection *(*add_stub_section) (const char *, asection *),
8594 void (*layout_sections_again) (void))
8595 {
8596 bfd_size_type stub_group_size;
8597 bfd_boolean stubs_always_before_branch;
8598 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8599
8600 /* Stash our params away. */
8601 htab->add_stub_section = add_stub_section;
8602 htab->layout_sections_again = layout_sections_again;
8603 stubs_always_before_branch = group_size < 0;
8604 if (group_size < 0)
8605 stub_group_size = -group_size;
8606 else
8607 stub_group_size = group_size;
8608 if (stub_group_size == 1)
8609 {
8610 /* Default values. */
8611 if (stubs_always_before_branch)
8612 {
8613 stub_group_size = 0x1e00000;
8614 if (htab->has_14bit_branch)
8615 stub_group_size = 0x7800;
8616 }
8617 else
8618 {
8619 stub_group_size = 0x1c00000;
8620 if (htab->has_14bit_branch)
8621 stub_group_size = 0x7000;
8622 }
8623 }
8624
8625 group_sections (htab, stub_group_size, stubs_always_before_branch);
8626
8627 while (1)
8628 {
8629 bfd *input_bfd;
8630 unsigned int bfd_indx;
8631 asection *stub_sec;
8632 bfd_boolean stub_changed;
8633
8634 htab->stub_iteration += 1;
8635 stub_changed = FALSE;
8636
8637 for (input_bfd = info->input_bfds, bfd_indx = 0;
8638 input_bfd != NULL;
8639 input_bfd = input_bfd->link_next, bfd_indx++)
8640 {
8641 Elf_Internal_Shdr *symtab_hdr;
8642 asection *section;
8643 Elf_Internal_Sym *local_syms = NULL;
8644
8645 /* We'll need the symbol table in a second. */
8646 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8647 if (symtab_hdr->sh_info == 0)
8648 continue;
8649
8650 /* Walk over each section attached to the input bfd. */
8651 for (section = input_bfd->sections;
8652 section != NULL;
8653 section = section->next)
8654 {
8655 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8656
8657 /* If there aren't any relocs, then there's nothing more
8658 to do. */
8659 if ((section->flags & SEC_RELOC) == 0
8660 || section->reloc_count == 0)
8661 continue;
8662
8663 /* If this section is a link-once section that will be
8664 discarded, then don't create any stubs. */
8665 if (section->output_section == NULL
8666 || section->output_section->owner != output_bfd)
8667 continue;
8668
8669 /* Get the relocs. */
8670 internal_relocs
8671 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8672 info->keep_memory);
8673 if (internal_relocs == NULL)
8674 goto error_ret_free_local;
8675
8676 /* Now examine each relocation. */
8677 irela = internal_relocs;
8678 irelaend = irela + section->reloc_count;
8679 for (; irela < irelaend; irela++)
8680 {
8681 enum elf_ppc64_reloc_type r_type;
8682 unsigned int r_indx;
8683 enum ppc_stub_type stub_type;
8684 struct ppc_stub_hash_entry *stub_entry;
8685 asection *sym_sec, *code_sec;
8686 bfd_vma sym_value;
8687 bfd_vma destination;
8688 bfd_boolean ok_dest;
8689 struct ppc_link_hash_entry *hash;
8690 struct ppc_link_hash_entry *fdh;
8691 struct elf_link_hash_entry *h;
8692 Elf_Internal_Sym *sym;
8693 char *stub_name;
8694 const asection *id_sec;
8695 long *opd_adjust;
8696
8697 r_type = ELF64_R_TYPE (irela->r_info);
8698 r_indx = ELF64_R_SYM (irela->r_info);
8699
8700 if (r_type >= R_PPC64_max)
8701 {
8702 bfd_set_error (bfd_error_bad_value);
8703 goto error_ret_free_internal;
8704 }
8705
8706 /* Only look for stubs on branch instructions. */
8707 if (r_type != R_PPC64_REL24
8708 && r_type != R_PPC64_REL14
8709 && r_type != R_PPC64_REL14_BRTAKEN
8710 && r_type != R_PPC64_REL14_BRNTAKEN)
8711 continue;
8712
8713 /* Now determine the call target, its name, value,
8714 section. */
8715 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8716 r_indx, input_bfd))
8717 goto error_ret_free_internal;
8718 hash = (struct ppc_link_hash_entry *) h;
8719
8720 ok_dest = FALSE;
8721 fdh = NULL;
8722 if (hash == NULL)
8723 {
8724 sym_value = sym->st_value;
8725 ok_dest = TRUE;
8726 }
8727 else
8728 {
8729 sym_value = 0;
8730 /* Recognise an old ABI func code entry sym, and
8731 use the func descriptor sym instead. */
8732 if (hash->elf.root.type == bfd_link_hash_undefweak
8733 && hash->elf.root.root.string[0] == '.'
8734 && (fdh = get_fdh (hash, htab)) != NULL)
8735 {
8736 if (fdh->elf.root.type == bfd_link_hash_defined
8737 || fdh->elf.root.type == bfd_link_hash_defweak)
8738 {
8739 sym_sec = fdh->elf.root.u.def.section;
8740 sym_value = fdh->elf.root.u.def.value;
8741 if (sym_sec->output_section != NULL)
8742 ok_dest = TRUE;
8743 }
8744 else
8745 fdh = NULL;
8746 }
8747 else if (hash->elf.root.type == bfd_link_hash_defined
8748 || hash->elf.root.type == bfd_link_hash_defweak)
8749 {
8750 sym_value = hash->elf.root.u.def.value;
8751 if (sym_sec->output_section != NULL)
8752 ok_dest = TRUE;
8753 }
8754 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8755 ;
8756 else if (hash->elf.root.type == bfd_link_hash_undefined)
8757 ;
8758 else
8759 {
8760 bfd_set_error (bfd_error_bad_value);
8761 goto error_ret_free_internal;
8762 }
8763 }
8764
8765 destination = 0;
8766 if (ok_dest)
8767 {
8768 sym_value += irela->r_addend;
8769 destination = (sym_value
8770 + sym_sec->output_offset
8771 + sym_sec->output_section->vma);
8772 }
8773
8774 code_sec = sym_sec;
8775 opd_adjust = get_opd_info (sym_sec);
8776 if (opd_adjust != NULL)
8777 {
8778 bfd_vma dest;
8779
8780 if (hash == NULL)
8781 {
8782 long adjust = opd_adjust[sym_value / 8];
8783 if (adjust == -1)
8784 continue;
8785 sym_value += adjust;
8786 }
8787 dest = opd_entry_value (sym_sec, sym_value,
8788 &code_sec, &sym_value);
8789 if (dest != (bfd_vma) -1)
8790 {
8791 destination = dest;
8792 if (fdh != NULL)
8793 {
8794 /* Fixup old ABI sym to point at code
8795 entry. */
8796 hash->elf.root.type = bfd_link_hash_defweak;
8797 hash->elf.root.u.def.section = code_sec;
8798 hash->elf.root.u.def.value = sym_value;
8799 }
8800 }
8801 }
8802
8803 /* Determine what (if any) linker stub is needed. */
8804 stub_type = ppc_type_of_stub (section, irela, &hash,
8805 destination);
8806
8807 if (stub_type != ppc_stub_plt_call)
8808 {
8809 /* Check whether we need a TOC adjusting stub.
8810 Since the linker pastes together pieces from
8811 different object files when creating the
8812 _init and _fini functions, it may be that a
8813 call to what looks like a local sym is in
8814 fact a call needing a TOC adjustment. */
8815 if (code_sec != NULL
8816 && code_sec->output_section != NULL
8817 && (htab->stub_group[code_sec->id].toc_off
8818 != htab->stub_group[section->id].toc_off)
8819 && (code_sec->has_toc_reloc
8820 || code_sec->makes_toc_func_call))
8821 stub_type = ppc_stub_long_branch_r2off;
8822 }
8823
8824 if (stub_type == ppc_stub_none)
8825 continue;
8826
8827 /* __tls_get_addr calls might be eliminated. */
8828 if (stub_type != ppc_stub_plt_call
8829 && hash != NULL
8830 && (hash == htab->tls_get_addr
8831 || hash == htab->tls_get_addr_fd)
8832 && section->has_tls_reloc
8833 && irela != internal_relocs)
8834 {
8835 /* Get tls info. */
8836 char *tls_mask;
8837
8838 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
8839 irela - 1, input_bfd))
8840 goto error_ret_free_internal;
8841 if (*tls_mask != 0)
8842 continue;
8843 }
8844
8845 /* Support for grouping stub sections. */
8846 id_sec = htab->stub_group[section->id].link_sec;
8847
8848 /* Get the name of this stub. */
8849 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
8850 if (!stub_name)
8851 goto error_ret_free_internal;
8852
8853 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
8854 stub_name, FALSE, FALSE);
8855 if (stub_entry != NULL)
8856 {
8857 /* The proper stub has already been created. */
8858 free (stub_name);
8859 continue;
8860 }
8861
8862 stub_entry = ppc_add_stub (stub_name, section, htab);
8863 if (stub_entry == NULL)
8864 {
8865 free (stub_name);
8866 error_ret_free_internal:
8867 if (elf_section_data (section)->relocs == NULL)
8868 free (internal_relocs);
8869 error_ret_free_local:
8870 if (local_syms != NULL
8871 && (symtab_hdr->contents
8872 != (unsigned char *) local_syms))
8873 free (local_syms);
8874 return FALSE;
8875 }
8876
8877 stub_entry->stub_type = stub_type;
8878 stub_entry->target_value = sym_value;
8879 stub_entry->target_section = code_sec;
8880 stub_entry->h = hash;
8881 stub_entry->addend = irela->r_addend;
8882
8883 if (stub_entry->h != NULL)
8884 htab->stub_globals += 1;
8885
8886 stub_changed = TRUE;
8887 }
8888
8889 /* We're done with the internal relocs, free them. */
8890 if (elf_section_data (section)->relocs != internal_relocs)
8891 free (internal_relocs);
8892 }
8893
8894 if (local_syms != NULL
8895 && symtab_hdr->contents != (unsigned char *) local_syms)
8896 {
8897 if (!info->keep_memory)
8898 free (local_syms);
8899 else
8900 symtab_hdr->contents = (unsigned char *) local_syms;
8901 }
8902 }
8903
8904 if (!stub_changed)
8905 break;
8906
8907 /* OK, we've added some stubs. Find out the new size of the
8908 stub sections. */
8909 for (stub_sec = htab->stub_bfd->sections;
8910 stub_sec != NULL;
8911 stub_sec = stub_sec->next)
8912 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8913 {
8914 stub_sec->size = 0;
8915 stub_sec->reloc_count = 0;
8916 }
8917
8918 htab->brlt->size = 0;
8919 if (htab->relbrlt != NULL)
8920 htab->relbrlt->size = 0;
8921
8922 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
8923
8924 /* Ask the linker to do its stuff. */
8925 (*htab->layout_sections_again) ();
8926 }
8927
8928 /* It would be nice to strip .branch_lt from the output if the
8929 section is empty, but it's too late. If we strip sections here,
8930 the dynamic symbol table is corrupted since the section symbol
8931 for the stripped section isn't written. */
8932
8933 return TRUE;
8934 }
8935
8936 /* Called after we have determined section placement. If sections
8937 move, we'll be called again. Provide a value for TOCstart. */
8938
8939 bfd_vma
8940 ppc64_elf_toc (bfd *obfd)
8941 {
8942 asection *s;
8943 bfd_vma TOCstart;
8944
8945 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
8946 order. The TOC starts where the first of these sections starts. */
8947 s = bfd_get_section_by_name (obfd, ".got");
8948 if (s == NULL)
8949 s = bfd_get_section_by_name (obfd, ".toc");
8950 if (s == NULL)
8951 s = bfd_get_section_by_name (obfd, ".tocbss");
8952 if (s == NULL)
8953 s = bfd_get_section_by_name (obfd, ".plt");
8954 if (s == NULL)
8955 {
8956 /* This may happen for
8957 o references to TOC base (SYM@toc / TOC[tc0]) without a
8958 .toc directive
8959 o bad linker script
8960 o --gc-sections and empty TOC sections
8961
8962 FIXME: Warn user? */
8963
8964 /* Look for a likely section. We probably won't even be
8965 using TOCstart. */
8966 for (s = obfd->sections; s != NULL; s = s->next)
8967 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
8968 == (SEC_ALLOC | SEC_SMALL_DATA))
8969 break;
8970 if (s == NULL)
8971 for (s = obfd->sections; s != NULL; s = s->next)
8972 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
8973 == (SEC_ALLOC | SEC_SMALL_DATA))
8974 break;
8975 if (s == NULL)
8976 for (s = obfd->sections; s != NULL; s = s->next)
8977 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
8978 break;
8979 if (s == NULL)
8980 for (s = obfd->sections; s != NULL; s = s->next)
8981 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
8982 break;
8983 }
8984
8985 TOCstart = 0;
8986 if (s != NULL)
8987 TOCstart = s->output_section->vma + s->output_offset;
8988
8989 return TOCstart;
8990 }
8991
8992 /* Build all the stubs associated with the current output file.
8993 The stubs are kept in a hash table attached to the main linker
8994 hash table. This function is called via gldelf64ppc_finish. */
8995
8996 bfd_boolean
8997 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
8998 struct bfd_link_info *info,
8999 char **stats)
9000 {
9001 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9002 asection *stub_sec;
9003 bfd_byte *p;
9004 int stub_sec_count = 0;
9005
9006 htab->emit_stub_syms = emit_stub_syms;
9007
9008 /* Allocate memory to hold the linker stubs. */
9009 for (stub_sec = htab->stub_bfd->sections;
9010 stub_sec != NULL;
9011 stub_sec = stub_sec->next)
9012 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9013 && stub_sec->size != 0)
9014 {
9015 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9016 if (stub_sec->contents == NULL)
9017 return FALSE;
9018 /* We want to check that built size is the same as calculated
9019 size. rawsize is a convenient location to use. */
9020 stub_sec->rawsize = stub_sec->size;
9021 stub_sec->size = 0;
9022 }
9023
9024 if (htab->plt != NULL)
9025 {
9026 unsigned int indx;
9027 bfd_vma plt0;
9028
9029 /* Build the .glink plt call stub. */
9030 plt0 = (htab->plt->output_section->vma
9031 + htab->plt->output_offset
9032 - (htab->glink->output_section->vma
9033 + htab->glink->output_offset
9034 + GLINK_CALL_STUB_SIZE));
9035 if (plt0 + 0x80008000 > 0xffffffff)
9036 {
9037 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9038 bfd_set_error (bfd_error_bad_value);
9039 return FALSE;
9040 }
9041
9042 if (htab->emit_stub_syms)
9043 {
9044 struct elf_link_hash_entry *h;
9045 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9046 if (h == NULL)
9047 return FALSE;
9048 if (h->root.type == bfd_link_hash_new)
9049 {
9050 h->root.type = bfd_link_hash_defined;
9051 h->root.u.def.section = htab->glink;
9052 h->root.u.def.value = 0;
9053 h->ref_regular = 1;
9054 h->def_regular = 1;
9055 h->ref_regular_nonweak = 1;
9056 h->forced_local = 1;
9057 h->non_elf = 0;
9058 }
9059 }
9060 p = htab->glink->contents;
9061 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9062 p += 4;
9063 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9064 p += 4;
9065 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9066 p += 4;
9067 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9068 p += 4;
9069 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9070 p += 4;
9071 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9072 p += 4;
9073 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9074 p += 4;
9075 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9076 p += 4;
9077 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9078 p += 4;
9079 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9080 p += 4;
9081 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9082 p += 4;
9083 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9084 p += 4;
9085 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9086 p += 4;
9087 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9088 p += 4;
9089 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9090 p += 4;
9091 bfd_put_32 (htab->glink->owner, BCTR, p);
9092 p += 4;
9093
9094 /* Build the .glink lazy link call stubs. */
9095 indx = 0;
9096 while (p < htab->glink->contents + htab->glink->size)
9097 {
9098 if (indx < 0x8000)
9099 {
9100 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9101 p += 4;
9102 }
9103 else
9104 {
9105 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9106 p += 4;
9107 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9108 p += 4;
9109 }
9110 bfd_put_32 (htab->glink->owner,
9111 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9112 indx++;
9113 p += 4;
9114 }
9115 htab->glink->rawsize = p - htab->glink->contents;
9116 }
9117
9118 if (htab->brlt->size != 0)
9119 {
9120 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9121 htab->brlt->size);
9122 if (htab->brlt->contents == NULL)
9123 return FALSE;
9124 }
9125 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9126 {
9127 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9128 htab->relbrlt->size);
9129 if (htab->relbrlt->contents == NULL)
9130 return FALSE;
9131 }
9132
9133 /* Build the stubs as directed by the stub hash table. */
9134 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9135
9136 for (stub_sec = htab->stub_bfd->sections;
9137 stub_sec != NULL;
9138 stub_sec = stub_sec->next)
9139 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9140 {
9141 stub_sec_count += 1;
9142 if (stub_sec->rawsize != stub_sec->size)
9143 break;
9144 }
9145
9146 if (stub_sec != NULL
9147 || htab->glink->rawsize != htab->glink->size)
9148 {
9149 htab->stub_error = TRUE;
9150 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9151 }
9152
9153 if (htab->stub_error)
9154 return FALSE;
9155
9156 if (stats != NULL)
9157 {
9158 *stats = bfd_malloc (500);
9159 if (*stats == NULL)
9160 return FALSE;
9161
9162 sprintf (*stats, _("linker stubs in %u group%s\n"
9163 " branch %lu\n"
9164 " toc adjust %lu\n"
9165 " long branch %lu\n"
9166 " long toc adj %lu\n"
9167 " plt call %lu"),
9168 stub_sec_count,
9169 stub_sec_count == 1 ? "" : "s",
9170 htab->stub_count[ppc_stub_long_branch - 1],
9171 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9172 htab->stub_count[ppc_stub_plt_branch - 1],
9173 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9174 htab->stub_count[ppc_stub_plt_call - 1]);
9175 }
9176 return TRUE;
9177 }
9178
9179 /* This function undoes the changes made by add_symbol_adjust. */
9180
9181 static bfd_boolean
9182 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9183 {
9184 struct ppc_link_hash_entry *eh;
9185
9186 if (h->root.type == bfd_link_hash_indirect)
9187 return TRUE;
9188
9189 if (h->root.type == bfd_link_hash_warning)
9190 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9191
9192 eh = (struct ppc_link_hash_entry *) h;
9193 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9194 return TRUE;
9195
9196 eh->elf.root.type = bfd_link_hash_undefined;
9197 return TRUE;
9198 }
9199
9200 void
9201 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9202 {
9203 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9204 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9205 }
9206
9207 /* The RELOCATE_SECTION function is called by the ELF backend linker
9208 to handle the relocations for a section.
9209
9210 The relocs are always passed as Rela structures; if the section
9211 actually uses Rel structures, the r_addend field will always be
9212 zero.
9213
9214 This function is responsible for adjust the section contents as
9215 necessary, and (if using Rela relocs and generating a
9216 relocatable output file) adjusting the reloc addend as
9217 necessary.
9218
9219 This function does not have to worry about setting the reloc
9220 address or the reloc symbol index.
9221
9222 LOCAL_SYMS is a pointer to the swapped in local symbols.
9223
9224 LOCAL_SECTIONS is an array giving the section in the input file
9225 corresponding to the st_shndx field of each local symbol.
9226
9227 The global hash table entry for the global symbols can be found
9228 via elf_sym_hashes (input_bfd).
9229
9230 When generating relocatable output, this function must handle
9231 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9232 going to be the section symbol corresponding to the output
9233 section, which means that the addend must be adjusted
9234 accordingly. */
9235
9236 static bfd_boolean
9237 ppc64_elf_relocate_section (bfd *output_bfd,
9238 struct bfd_link_info *info,
9239 bfd *input_bfd,
9240 asection *input_section,
9241 bfd_byte *contents,
9242 Elf_Internal_Rela *relocs,
9243 Elf_Internal_Sym *local_syms,
9244 asection **local_sections)
9245 {
9246 struct ppc_link_hash_table *htab;
9247 Elf_Internal_Shdr *symtab_hdr;
9248 struct elf_link_hash_entry **sym_hashes;
9249 Elf_Internal_Rela *rel;
9250 Elf_Internal_Rela *relend;
9251 Elf_Internal_Rela outrel;
9252 bfd_byte *loc;
9253 struct got_entry **local_got_ents;
9254 bfd_vma TOCstart;
9255 bfd_boolean ret = TRUE;
9256 bfd_boolean is_opd;
9257 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9258 bfd_boolean is_power4 = FALSE;
9259
9260 if (info->relocatable)
9261 return TRUE;
9262
9263 /* Initialize howto table if needed. */
9264 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9265 ppc_howto_init ();
9266
9267 htab = ppc_hash_table (info);
9268
9269 /* Don't relocate stub sections. */
9270 if (input_section->owner == htab->stub_bfd)
9271 return TRUE;
9272
9273 local_got_ents = elf_local_got_ents (input_bfd);
9274 TOCstart = elf_gp (output_bfd);
9275 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9276 sym_hashes = elf_sym_hashes (input_bfd);
9277 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9278
9279 rel = relocs;
9280 relend = relocs + input_section->reloc_count;
9281 for (; rel < relend; rel++)
9282 {
9283 enum elf_ppc64_reloc_type r_type;
9284 bfd_vma addend;
9285 bfd_reloc_status_type r;
9286 Elf_Internal_Sym *sym;
9287 asection *sec;
9288 struct elf_link_hash_entry *h_elf;
9289 struct ppc_link_hash_entry *h;
9290 struct ppc_link_hash_entry *fdh;
9291 const char *sym_name;
9292 unsigned long r_symndx, toc_symndx;
9293 char tls_mask, tls_gd, tls_type;
9294 char sym_type;
9295 bfd_vma relocation;
9296 bfd_boolean unresolved_reloc;
9297 bfd_boolean warned;
9298 unsigned long insn, mask;
9299 struct ppc_stub_hash_entry *stub_entry;
9300 bfd_vma max_br_offset;
9301 bfd_vma from;
9302
9303 r_type = ELF64_R_TYPE (rel->r_info);
9304 r_symndx = ELF64_R_SYM (rel->r_info);
9305
9306 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9307 symbol of the previous ADDR64 reloc. The symbol gives us the
9308 proper TOC base to use. */
9309 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9310 && rel != relocs
9311 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9312 && is_opd)
9313 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9314
9315 sym = NULL;
9316 sec = NULL;
9317 h_elf = NULL;
9318 sym_name = NULL;
9319 unresolved_reloc = FALSE;
9320 warned = FALSE;
9321
9322 if (r_symndx < symtab_hdr->sh_info)
9323 {
9324 /* It's a local symbol. */
9325 long *opd_adjust;
9326
9327 sym = local_syms + r_symndx;
9328 sec = local_sections[r_symndx];
9329 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
9330 sym_type = ELF64_ST_TYPE (sym->st_info);
9331 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9332 opd_adjust = get_opd_info (sec);
9333 if (opd_adjust != NULL)
9334 {
9335 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9336 if (adjust == -1)
9337 relocation = 0;
9338 else
9339 relocation += adjust;
9340 }
9341 }
9342 else
9343 {
9344 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9345 r_symndx, symtab_hdr, sym_hashes,
9346 h_elf, sec, relocation,
9347 unresolved_reloc, warned);
9348 sym_name = h_elf->root.root.string;
9349 sym_type = h_elf->type;
9350 }
9351 h = (struct ppc_link_hash_entry *) h_elf;
9352
9353 /* TLS optimizations. Replace instruction sequences and relocs
9354 based on information we collected in tls_optimize. We edit
9355 RELOCS so that --emit-relocs will output something sensible
9356 for the final instruction stream. */
9357 tls_mask = 0;
9358 tls_gd = 0;
9359 toc_symndx = 0;
9360 if (IS_PPC64_TLS_RELOC (r_type))
9361 {
9362 if (h != NULL)
9363 tls_mask = h->tls_mask;
9364 else if (local_got_ents != NULL)
9365 {
9366 char *lgot_masks;
9367 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9368 tls_mask = lgot_masks[r_symndx];
9369 }
9370 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9371 {
9372 /* Check for toc tls entries. */
9373 char *toc_tls;
9374
9375 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9376 rel, input_bfd))
9377 return FALSE;
9378
9379 if (toc_tls)
9380 tls_mask = *toc_tls;
9381 }
9382 }
9383
9384 /* Check that tls relocs are used with tls syms, and non-tls
9385 relocs are used with non-tls syms. */
9386 if (r_symndx != 0
9387 && r_type != R_PPC64_NONE
9388 && (h == NULL
9389 || h->elf.root.type == bfd_link_hash_defined
9390 || h->elf.root.type == bfd_link_hash_defweak)
9391 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9392 {
9393 if (r_type == R_PPC64_TLS && tls_mask != 0)
9394 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9395 ;
9396 else
9397 (*_bfd_error_handler)
9398 (sym_type == STT_TLS
9399 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9400 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9401 input_bfd,
9402 input_section,
9403 (long) rel->r_offset,
9404 ppc64_elf_howto_table[r_type]->name,
9405 sym_name);
9406 }
9407
9408 /* Ensure reloc mapping code below stays sane. */
9409 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9410 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9411 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9412 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9413 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9414 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9415 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9416 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9417 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9418 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9419 abort ();
9420
9421 switch (r_type)
9422 {
9423 default:
9424 break;
9425
9426 case R_PPC64_TOC16:
9427 case R_PPC64_TOC16_LO:
9428 case R_PPC64_TOC16_DS:
9429 case R_PPC64_TOC16_LO_DS:
9430 {
9431 /* Check for toc tls entries. */
9432 char *toc_tls;
9433 int retval;
9434
9435 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9436 rel, input_bfd);
9437 if (retval == 0)
9438 return FALSE;
9439
9440 if (toc_tls)
9441 {
9442 tls_mask = *toc_tls;
9443 if (r_type == R_PPC64_TOC16_DS
9444 || r_type == R_PPC64_TOC16_LO_DS)
9445 {
9446 if (tls_mask != 0
9447 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9448 goto toctprel;
9449 }
9450 else
9451 {
9452 /* If we found a GD reloc pair, then we might be
9453 doing a GD->IE transition. */
9454 if (retval == 2)
9455 {
9456 tls_gd = TLS_TPRELGD;
9457 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9458 goto tls_get_addr_check;
9459 }
9460 else if (retval == 3)
9461 {
9462 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9463 goto tls_get_addr_check;
9464 }
9465 }
9466 }
9467 }
9468 break;
9469
9470 case R_PPC64_GOT_TPREL16_DS:
9471 case R_PPC64_GOT_TPREL16_LO_DS:
9472 if (tls_mask != 0
9473 && (tls_mask & TLS_TPREL) == 0)
9474 {
9475 toctprel:
9476 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9477 insn &= 31 << 21;
9478 insn |= 0x3c0d0000; /* addis 0,13,0 */
9479 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9480 r_type = R_PPC64_TPREL16_HA;
9481 if (toc_symndx != 0)
9482 {
9483 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9484 /* We changed the symbol. Start over in order to
9485 get h, sym, sec etc. right. */
9486 rel--;
9487 continue;
9488 }
9489 else
9490 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9491 }
9492 break;
9493
9494 case R_PPC64_TLS:
9495 if (tls_mask != 0
9496 && (tls_mask & TLS_TPREL) == 0)
9497 {
9498 bfd_vma rtra;
9499 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9500 if ((insn & ((0x3f << 26) | (31 << 11)))
9501 == ((31 << 26) | (13 << 11)))
9502 rtra = insn & ((1 << 26) - (1 << 16));
9503 else if ((insn & ((0x3f << 26) | (31 << 16)))
9504 == ((31 << 26) | (13 << 16)))
9505 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9506 else
9507 abort ();
9508 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9509 /* add -> addi. */
9510 insn = 14 << 26;
9511 else if ((insn & (31 << 1)) == 23 << 1
9512 && ((insn & (31 << 6)) < 14 << 6
9513 || ((insn & (31 << 6)) >= 16 << 6
9514 && (insn & (31 << 6)) < 24 << 6)))
9515 /* load and store indexed -> dform. */
9516 insn = (32 | ((insn >> 6) & 31)) << 26;
9517 else if ((insn & (31 << 1)) == 21 << 1
9518 && (insn & (0x1a << 6)) == 0)
9519 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9520 insn = (((58 | ((insn >> 6) & 4)) << 26)
9521 | ((insn >> 6) & 1));
9522 else if ((insn & (31 << 1)) == 21 << 1
9523 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9524 /* lwax -> lwa. */
9525 insn = (58 << 26) | 2;
9526 else
9527 abort ();
9528 insn |= rtra;
9529 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9530 /* Was PPC64_TLS which sits on insn boundary, now
9531 PPC64_TPREL16_LO which is at insn+2. */
9532 rel->r_offset += 2;
9533 r_type = R_PPC64_TPREL16_LO;
9534 if (toc_symndx != 0)
9535 {
9536 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9537 /* We changed the symbol. Start over in order to
9538 get h, sym, sec etc. right. */
9539 rel--;
9540 continue;
9541 }
9542 else
9543 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9544 }
9545 break;
9546
9547 case R_PPC64_GOT_TLSGD16_HI:
9548 case R_PPC64_GOT_TLSGD16_HA:
9549 tls_gd = TLS_TPRELGD;
9550 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9551 goto tls_gdld_hi;
9552 break;
9553
9554 case R_PPC64_GOT_TLSLD16_HI:
9555 case R_PPC64_GOT_TLSLD16_HA:
9556 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9557 {
9558 tls_gdld_hi:
9559 if ((tls_mask & tls_gd) != 0)
9560 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9561 + R_PPC64_GOT_TPREL16_DS);
9562 else
9563 {
9564 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9565 rel->r_offset -= 2;
9566 r_type = R_PPC64_NONE;
9567 }
9568 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9569 }
9570 break;
9571
9572 case R_PPC64_GOT_TLSGD16:
9573 case R_PPC64_GOT_TLSGD16_LO:
9574 tls_gd = TLS_TPRELGD;
9575 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9576 goto tls_get_addr_check;
9577 break;
9578
9579 case R_PPC64_GOT_TLSLD16:
9580 case R_PPC64_GOT_TLSLD16_LO:
9581 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9582 {
9583 tls_get_addr_check:
9584 if (rel + 1 < relend)
9585 {
9586 enum elf_ppc64_reloc_type r_type2;
9587 unsigned long r_symndx2;
9588 struct elf_link_hash_entry *h2;
9589 bfd_vma insn1, insn2, insn3;
9590 bfd_vma offset;
9591
9592 /* The next instruction should be a call to
9593 __tls_get_addr. Peek at the reloc to be sure. */
9594 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9595 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9596 if (r_symndx2 < symtab_hdr->sh_info
9597 || (r_type2 != R_PPC64_REL14
9598 && r_type2 != R_PPC64_REL14_BRTAKEN
9599 && r_type2 != R_PPC64_REL14_BRNTAKEN
9600 && r_type2 != R_PPC64_REL24))
9601 break;
9602
9603 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9604 while (h2->root.type == bfd_link_hash_indirect
9605 || h2->root.type == bfd_link_hash_warning)
9606 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9607 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9608 && h2 != &htab->tls_get_addr_fd->elf))
9609 break;
9610
9611 /* OK, it checks out. Replace the call. */
9612 offset = rel[1].r_offset;
9613 insn1 = bfd_get_32 (output_bfd,
9614 contents + rel->r_offset - 2);
9615 insn3 = bfd_get_32 (output_bfd,
9616 contents + offset + 4);
9617 if ((tls_mask & tls_gd) != 0)
9618 {
9619 /* IE */
9620 insn1 &= (1 << 26) - (1 << 2);
9621 insn1 |= 58 << 26; /* ld */
9622 insn2 = 0x7c636a14; /* add 3,3,13 */
9623 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9624 if ((tls_mask & TLS_EXPLICIT) == 0)
9625 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9626 + R_PPC64_GOT_TPREL16_DS);
9627 else
9628 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9629 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9630 }
9631 else
9632 {
9633 /* LE */
9634 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9635 insn2 = 0x38630000; /* addi 3,3,0 */
9636 if (tls_gd == 0)
9637 {
9638 /* Was an LD reloc. */
9639 r_symndx = 0;
9640 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9641 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9642 }
9643 else if (toc_symndx != 0)
9644 r_symndx = toc_symndx;
9645 r_type = R_PPC64_TPREL16_HA;
9646 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9647 rel[1].r_info = ELF64_R_INFO (r_symndx,
9648 R_PPC64_TPREL16_LO);
9649 rel[1].r_offset += 2;
9650 }
9651 if (insn3 == NOP
9652 || insn3 == CROR_151515 || insn3 == CROR_313131)
9653 {
9654 insn3 = insn2;
9655 insn2 = NOP;
9656 rel[1].r_offset += 4;
9657 }
9658 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9659 bfd_put_32 (output_bfd, insn2, contents + offset);
9660 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9661 if (tls_gd == 0 || toc_symndx != 0)
9662 {
9663 /* We changed the symbol. Start over in order
9664 to get h, sym, sec etc. right. */
9665 rel--;
9666 continue;
9667 }
9668 }
9669 }
9670 break;
9671
9672 case R_PPC64_DTPMOD64:
9673 if (rel + 1 < relend
9674 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9675 && rel[1].r_offset == rel->r_offset + 8)
9676 {
9677 if ((tls_mask & TLS_GD) == 0)
9678 {
9679 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9680 if ((tls_mask & TLS_TPRELGD) != 0)
9681 r_type = R_PPC64_TPREL64;
9682 else
9683 {
9684 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9685 r_type = R_PPC64_NONE;
9686 }
9687 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9688 }
9689 }
9690 else
9691 {
9692 if ((tls_mask & TLS_LD) == 0)
9693 {
9694 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9695 r_type = R_PPC64_NONE;
9696 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9697 }
9698 }
9699 break;
9700
9701 case R_PPC64_TPREL64:
9702 if ((tls_mask & TLS_TPREL) == 0)
9703 {
9704 r_type = R_PPC64_NONE;
9705 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9706 }
9707 break;
9708 }
9709
9710 /* Handle other relocations that tweak non-addend part of insn. */
9711 insn = 0;
9712 max_br_offset = 1 << 25;
9713 addend = rel->r_addend;
9714 switch (r_type)
9715 {
9716 default:
9717 break;
9718
9719 /* Branch taken prediction relocations. */
9720 case R_PPC64_ADDR14_BRTAKEN:
9721 case R_PPC64_REL14_BRTAKEN:
9722 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9723 /* Fall thru. */
9724
9725 /* Branch not taken prediction relocations. */
9726 case R_PPC64_ADDR14_BRNTAKEN:
9727 case R_PPC64_REL14_BRNTAKEN:
9728 insn |= bfd_get_32 (output_bfd,
9729 contents + rel->r_offset) & ~(0x01 << 21);
9730 /* Fall thru. */
9731
9732 case R_PPC64_REL14:
9733 max_br_offset = 1 << 15;
9734 /* Fall thru. */
9735
9736 case R_PPC64_REL24:
9737 /* Calls to functions with a different TOC, such as calls to
9738 shared objects, need to alter the TOC pointer. This is
9739 done using a linkage stub. A REL24 branching to these
9740 linkage stubs needs to be followed by a nop, as the nop
9741 will be replaced with an instruction to restore the TOC
9742 base pointer. */
9743 stub_entry = NULL;
9744 fdh = h;
9745 if (((h != NULL
9746 && (((fdh = h->oh) != NULL
9747 && fdh->elf.plt.plist != NULL)
9748 || (fdh = h)->elf.plt.plist != NULL))
9749 || (sec != NULL
9750 && sec->output_section != NULL
9751 && sec->id <= htab->top_id
9752 && (htab->stub_group[sec->id].toc_off
9753 != htab->stub_group[input_section->id].toc_off)))
9754 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9755 rel, htab)) != NULL
9756 && (stub_entry->stub_type == ppc_stub_plt_call
9757 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9758 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9759 {
9760 bfd_boolean can_plt_call = FALSE;
9761
9762 if (rel->r_offset + 8 <= input_section->size)
9763 {
9764 unsigned long nop;
9765 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9766 if (nop == NOP
9767 || nop == CROR_151515 || nop == CROR_313131)
9768 {
9769 bfd_put_32 (input_bfd, LD_R2_40R1,
9770 contents + rel->r_offset + 4);
9771 can_plt_call = TRUE;
9772 }
9773 }
9774
9775 if (!can_plt_call)
9776 {
9777 if (stub_entry->stub_type == ppc_stub_plt_call)
9778 {
9779 /* If this is a plain branch rather than a branch
9780 and link, don't require a nop. */
9781 unsigned long br;
9782 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
9783 if ((br & 1) == 0)
9784 can_plt_call = TRUE;
9785 }
9786 else if (h != NULL
9787 && strcmp (h->elf.root.root.string,
9788 ".__libc_start_main") == 0)
9789 {
9790 /* Allow crt1 branch to go via a toc adjusting stub. */
9791 can_plt_call = TRUE;
9792 }
9793 else
9794 {
9795 if (strcmp (input_section->output_section->name,
9796 ".init") == 0
9797 || strcmp (input_section->output_section->name,
9798 ".fini") == 0)
9799 (*_bfd_error_handler)
9800 (_("%B(%A+0x%lx): automatic multiple TOCs "
9801 "not supported using your crt files; "
9802 "recompile with -mminimal-toc or upgrade gcc"),
9803 input_bfd,
9804 input_section,
9805 (long) rel->r_offset);
9806 else
9807 (*_bfd_error_handler)
9808 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
9809 "does not allow automatic multiple TOCs; "
9810 "recompile with -mminimal-toc or "
9811 "-fno-optimize-sibling-calls, "
9812 "or make `%s' extern"),
9813 input_bfd,
9814 input_section,
9815 (long) rel->r_offset,
9816 sym_name,
9817 sym_name);
9818 bfd_set_error (bfd_error_bad_value);
9819 ret = FALSE;
9820 }
9821 }
9822
9823 if (can_plt_call
9824 && stub_entry->stub_type == ppc_stub_plt_call)
9825 unresolved_reloc = FALSE;
9826 }
9827
9828 if (stub_entry == NULL
9829 && get_opd_info (sec) != NULL)
9830 {
9831 /* The branch destination is the value of the opd entry. */
9832 bfd_vma off = (relocation - sec->output_section->vma
9833 - sec->output_offset + rel->r_addend);
9834 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
9835 if (dest != (bfd_vma) -1)
9836 {
9837 relocation = dest;
9838 addend = 0;
9839 }
9840 }
9841
9842 /* If the branch is out of reach we ought to have a long
9843 branch stub. */
9844 from = (rel->r_offset
9845 + input_section->output_offset
9846 + input_section->output_section->vma);
9847
9848 if (stub_entry == NULL
9849 && (relocation + rel->r_addend - from + max_br_offset
9850 >= 2 * max_br_offset)
9851 && r_type != R_PPC64_ADDR14_BRTAKEN
9852 && r_type != R_PPC64_ADDR14_BRNTAKEN)
9853 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
9854 htab);
9855
9856 if (stub_entry != NULL)
9857 {
9858 /* Munge up the value and addend so that we call the stub
9859 rather than the procedure directly. */
9860 relocation = (stub_entry->stub_offset
9861 + stub_entry->stub_sec->output_offset
9862 + stub_entry->stub_sec->output_section->vma);
9863 addend = 0;
9864 }
9865
9866 if (insn != 0)
9867 {
9868 if (is_power4)
9869 {
9870 /* Set 'a' bit. This is 0b00010 in BO field for branch
9871 on CR(BI) insns (BO == 001at or 011at), and 0b01000
9872 for branch on CTR insns (BO == 1a00t or 1a01t). */
9873 if ((insn & (0x14 << 21)) == (0x04 << 21))
9874 insn |= 0x02 << 21;
9875 else if ((insn & (0x14 << 21)) == (0x10 << 21))
9876 insn |= 0x08 << 21;
9877 else
9878 break;
9879 }
9880 else
9881 {
9882 /* Invert 'y' bit if not the default. */
9883 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
9884 insn ^= 0x01 << 21;
9885 }
9886
9887 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9888 }
9889
9890 /* NOP out calls to undefined weak functions.
9891 We can thus call a weak function without first
9892 checking whether the function is defined. */
9893 else if (h != NULL
9894 && h->elf.root.type == bfd_link_hash_undefweak
9895 && r_type == R_PPC64_REL24
9896 && relocation == 0
9897 && rel->r_addend == 0)
9898 {
9899 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9900 continue;
9901 }
9902 break;
9903 }
9904
9905 /* Set `addend'. */
9906 tls_type = 0;
9907 switch (r_type)
9908 {
9909 default:
9910 (*_bfd_error_handler)
9911 (_("%B: unknown relocation type %d for symbol %s"),
9912 input_bfd, (int) r_type, sym_name);
9913
9914 bfd_set_error (bfd_error_bad_value);
9915 ret = FALSE;
9916 continue;
9917
9918 case R_PPC64_NONE:
9919 case R_PPC64_TLS:
9920 case R_PPC64_GNU_VTINHERIT:
9921 case R_PPC64_GNU_VTENTRY:
9922 continue;
9923
9924 /* GOT16 relocations. Like an ADDR16 using the symbol's
9925 address in the GOT as relocation value instead of the
9926 symbol's value itself. Also, create a GOT entry for the
9927 symbol and put the symbol value there. */
9928 case R_PPC64_GOT_TLSGD16:
9929 case R_PPC64_GOT_TLSGD16_LO:
9930 case R_PPC64_GOT_TLSGD16_HI:
9931 case R_PPC64_GOT_TLSGD16_HA:
9932 tls_type = TLS_TLS | TLS_GD;
9933 goto dogot;
9934
9935 case R_PPC64_GOT_TLSLD16:
9936 case R_PPC64_GOT_TLSLD16_LO:
9937 case R_PPC64_GOT_TLSLD16_HI:
9938 case R_PPC64_GOT_TLSLD16_HA:
9939 tls_type = TLS_TLS | TLS_LD;
9940 goto dogot;
9941
9942 case R_PPC64_GOT_TPREL16_DS:
9943 case R_PPC64_GOT_TPREL16_LO_DS:
9944 case R_PPC64_GOT_TPREL16_HI:
9945 case R_PPC64_GOT_TPREL16_HA:
9946 tls_type = TLS_TLS | TLS_TPREL;
9947 goto dogot;
9948
9949 case R_PPC64_GOT_DTPREL16_DS:
9950 case R_PPC64_GOT_DTPREL16_LO_DS:
9951 case R_PPC64_GOT_DTPREL16_HI:
9952 case R_PPC64_GOT_DTPREL16_HA:
9953 tls_type = TLS_TLS | TLS_DTPREL;
9954 goto dogot;
9955
9956 case R_PPC64_GOT16:
9957 case R_PPC64_GOT16_LO:
9958 case R_PPC64_GOT16_HI:
9959 case R_PPC64_GOT16_HA:
9960 case R_PPC64_GOT16_DS:
9961 case R_PPC64_GOT16_LO_DS:
9962 dogot:
9963 {
9964 /* Relocation is to the entry for this symbol in the global
9965 offset table. */
9966 asection *got;
9967 bfd_vma *offp;
9968 bfd_vma off;
9969 unsigned long indx = 0;
9970
9971 if (tls_type == (TLS_TLS | TLS_LD)
9972 && (h == NULL
9973 || !h->elf.def_dynamic))
9974 offp = &ppc64_tlsld_got (input_bfd)->offset;
9975 else
9976 {
9977 struct got_entry *ent;
9978
9979 if (h != NULL)
9980 {
9981 bfd_boolean dyn = htab->elf.dynamic_sections_created;
9982 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
9983 &h->elf)
9984 || (info->shared
9985 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
9986 /* This is actually a static link, or it is a
9987 -Bsymbolic link and the symbol is defined
9988 locally, or the symbol was forced to be local
9989 because of a version file. */
9990 ;
9991 else
9992 {
9993 indx = h->elf.dynindx;
9994 unresolved_reloc = FALSE;
9995 }
9996 ent = h->elf.got.glist;
9997 }
9998 else
9999 {
10000 if (local_got_ents == NULL)
10001 abort ();
10002 ent = local_got_ents[r_symndx];
10003 }
10004
10005 for (; ent != NULL; ent = ent->next)
10006 if (ent->addend == rel->r_addend
10007 && ent->owner == input_bfd
10008 && ent->tls_type == tls_type)
10009 break;
10010 if (ent == NULL)
10011 abort ();
10012 offp = &ent->got.offset;
10013 }
10014
10015 got = ppc64_elf_tdata (input_bfd)->got;
10016 if (got == NULL)
10017 abort ();
10018
10019 /* The offset must always be a multiple of 8. We use the
10020 least significant bit to record whether we have already
10021 processed this entry. */
10022 off = *offp;
10023 if ((off & 1) != 0)
10024 off &= ~1;
10025 else
10026 {
10027 /* Generate relocs for the dynamic linker, except in
10028 the case of TLSLD where we'll use one entry per
10029 module. */
10030 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10031
10032 *offp = off | 1;
10033 if ((info->shared || indx != 0)
10034 && (h == NULL
10035 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10036 || h->elf.root.type != bfd_link_hash_undefweak))
10037 {
10038 outrel.r_offset = (got->output_section->vma
10039 + got->output_offset
10040 + off);
10041 outrel.r_addend = rel->r_addend;
10042 if (tls_type & (TLS_LD | TLS_GD))
10043 {
10044 outrel.r_addend = 0;
10045 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10046 if (tls_type == (TLS_TLS | TLS_GD))
10047 {
10048 loc = relgot->contents;
10049 loc += (relgot->reloc_count++
10050 * sizeof (Elf64_External_Rela));
10051 bfd_elf64_swap_reloca_out (output_bfd,
10052 &outrel, loc);
10053 outrel.r_offset += 8;
10054 outrel.r_addend = rel->r_addend;
10055 outrel.r_info
10056 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10057 }
10058 }
10059 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10060 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10061 else if (tls_type == (TLS_TLS | TLS_TPREL))
10062 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10063 else if (indx == 0)
10064 {
10065 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10066
10067 /* Write the .got section contents for the sake
10068 of prelink. */
10069 loc = got->contents + off;
10070 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10071 loc);
10072 }
10073 else
10074 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10075
10076 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10077 {
10078 outrel.r_addend += relocation;
10079 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10080 outrel.r_addend -= htab->elf.tls_sec->vma;
10081 }
10082 loc = relgot->contents;
10083 loc += (relgot->reloc_count++
10084 * sizeof (Elf64_External_Rela));
10085 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10086 }
10087
10088 /* Init the .got section contents here if we're not
10089 emitting a reloc. */
10090 else
10091 {
10092 relocation += rel->r_addend;
10093 if (tls_type == (TLS_TLS | TLS_LD))
10094 relocation = 1;
10095 else if (tls_type != 0)
10096 {
10097 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10098 if (tls_type == (TLS_TLS | TLS_TPREL))
10099 relocation += DTP_OFFSET - TP_OFFSET;
10100
10101 if (tls_type == (TLS_TLS | TLS_GD))
10102 {
10103 bfd_put_64 (output_bfd, relocation,
10104 got->contents + off + 8);
10105 relocation = 1;
10106 }
10107 }
10108
10109 bfd_put_64 (output_bfd, relocation,
10110 got->contents + off);
10111 }
10112 }
10113
10114 if (off >= (bfd_vma) -2)
10115 abort ();
10116
10117 relocation = got->output_offset + off;
10118
10119 /* TOC base (r2) is TOC start plus 0x8000. */
10120 addend = -TOC_BASE_OFF;
10121 }
10122 break;
10123
10124 case R_PPC64_PLT16_HA:
10125 case R_PPC64_PLT16_HI:
10126 case R_PPC64_PLT16_LO:
10127 case R_PPC64_PLT32:
10128 case R_PPC64_PLT64:
10129 /* Relocation is to the entry for this symbol in the
10130 procedure linkage table. */
10131
10132 /* Resolve a PLT reloc against a local symbol directly,
10133 without using the procedure linkage table. */
10134 if (h == NULL)
10135 break;
10136
10137 /* It's possible that we didn't make a PLT entry for this
10138 symbol. This happens when statically linking PIC code,
10139 or when using -Bsymbolic. Go find a match if there is a
10140 PLT entry. */
10141 if (htab->plt != NULL)
10142 {
10143 struct plt_entry *ent;
10144 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10145 if (ent->addend == rel->r_addend
10146 && ent->plt.offset != (bfd_vma) -1)
10147 {
10148 relocation = (htab->plt->output_section->vma
10149 + htab->plt->output_offset
10150 + ent->plt.offset);
10151 unresolved_reloc = FALSE;
10152 }
10153 }
10154 break;
10155
10156 case R_PPC64_TOC:
10157 /* Relocation value is TOC base. */
10158 relocation = TOCstart;
10159 if (r_symndx == 0)
10160 relocation += htab->stub_group[input_section->id].toc_off;
10161 else if (unresolved_reloc)
10162 ;
10163 else if (sec != NULL && sec->id <= htab->top_id)
10164 relocation += htab->stub_group[sec->id].toc_off;
10165 else
10166 unresolved_reloc = TRUE;
10167 goto dodyn2;
10168
10169 /* TOC16 relocs. We want the offset relative to the TOC base,
10170 which is the address of the start of the TOC plus 0x8000.
10171 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10172 in this order. */
10173 case R_PPC64_TOC16:
10174 case R_PPC64_TOC16_LO:
10175 case R_PPC64_TOC16_HI:
10176 case R_PPC64_TOC16_DS:
10177 case R_PPC64_TOC16_LO_DS:
10178 case R_PPC64_TOC16_HA:
10179 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10180 break;
10181
10182 /* Relocate against the beginning of the section. */
10183 case R_PPC64_SECTOFF:
10184 case R_PPC64_SECTOFF_LO:
10185 case R_PPC64_SECTOFF_HI:
10186 case R_PPC64_SECTOFF_DS:
10187 case R_PPC64_SECTOFF_LO_DS:
10188 case R_PPC64_SECTOFF_HA:
10189 if (sec != NULL)
10190 addend -= sec->output_section->vma;
10191 break;
10192
10193 case R_PPC64_REL14:
10194 case R_PPC64_REL14_BRNTAKEN:
10195 case R_PPC64_REL14_BRTAKEN:
10196 case R_PPC64_REL24:
10197 break;
10198
10199 case R_PPC64_TPREL16:
10200 case R_PPC64_TPREL16_LO:
10201 case R_PPC64_TPREL16_HI:
10202 case R_PPC64_TPREL16_HA:
10203 case R_PPC64_TPREL16_DS:
10204 case R_PPC64_TPREL16_LO_DS:
10205 case R_PPC64_TPREL16_HIGHER:
10206 case R_PPC64_TPREL16_HIGHERA:
10207 case R_PPC64_TPREL16_HIGHEST:
10208 case R_PPC64_TPREL16_HIGHESTA:
10209 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10210 if (info->shared)
10211 /* The TPREL16 relocs shouldn't really be used in shared
10212 libs as they will result in DT_TEXTREL being set, but
10213 support them anyway. */
10214 goto dodyn;
10215 break;
10216
10217 case R_PPC64_DTPREL16:
10218 case R_PPC64_DTPREL16_LO:
10219 case R_PPC64_DTPREL16_HI:
10220 case R_PPC64_DTPREL16_HA:
10221 case R_PPC64_DTPREL16_DS:
10222 case R_PPC64_DTPREL16_LO_DS:
10223 case R_PPC64_DTPREL16_HIGHER:
10224 case R_PPC64_DTPREL16_HIGHERA:
10225 case R_PPC64_DTPREL16_HIGHEST:
10226 case R_PPC64_DTPREL16_HIGHESTA:
10227 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10228 break;
10229
10230 case R_PPC64_DTPMOD64:
10231 relocation = 1;
10232 addend = 0;
10233 goto dodyn;
10234
10235 case R_PPC64_TPREL64:
10236 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10237 goto dodyn;
10238
10239 case R_PPC64_DTPREL64:
10240 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10241 /* Fall thru */
10242
10243 /* Relocations that may need to be propagated if this is a
10244 dynamic object. */
10245 case R_PPC64_REL30:
10246 case R_PPC64_REL32:
10247 case R_PPC64_REL64:
10248 case R_PPC64_ADDR14:
10249 case R_PPC64_ADDR14_BRNTAKEN:
10250 case R_PPC64_ADDR14_BRTAKEN:
10251 case R_PPC64_ADDR16:
10252 case R_PPC64_ADDR16_DS:
10253 case R_PPC64_ADDR16_HA:
10254 case R_PPC64_ADDR16_HI:
10255 case R_PPC64_ADDR16_HIGHER:
10256 case R_PPC64_ADDR16_HIGHERA:
10257 case R_PPC64_ADDR16_HIGHEST:
10258 case R_PPC64_ADDR16_HIGHESTA:
10259 case R_PPC64_ADDR16_LO:
10260 case R_PPC64_ADDR16_LO_DS:
10261 case R_PPC64_ADDR24:
10262 case R_PPC64_ADDR32:
10263 case R_PPC64_ADDR64:
10264 case R_PPC64_UADDR16:
10265 case R_PPC64_UADDR32:
10266 case R_PPC64_UADDR64:
10267 /* r_symndx will be zero only for relocs against symbols
10268 from removed linkonce sections, or sections discarded by
10269 a linker script. */
10270 dodyn:
10271 if (r_symndx == 0)
10272 break;
10273 /* Fall thru. */
10274
10275 dodyn2:
10276 if ((input_section->flags & SEC_ALLOC) == 0)
10277 break;
10278
10279 if (NO_OPD_RELOCS && is_opd)
10280 break;
10281
10282 if ((info->shared
10283 && (h == NULL
10284 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10285 || h->elf.root.type != bfd_link_hash_undefweak)
10286 && (MUST_BE_DYN_RELOC (r_type)
10287 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10288 || (ELIMINATE_COPY_RELOCS
10289 && !info->shared
10290 && h != NULL
10291 && h->elf.dynindx != -1
10292 && !h->elf.non_got_ref
10293 && h->elf.def_dynamic
10294 && !h->elf.def_regular))
10295 {
10296 Elf_Internal_Rela outrel;
10297 bfd_boolean skip, relocate;
10298 asection *sreloc;
10299 bfd_byte *loc;
10300 bfd_vma out_off;
10301
10302 /* When generating a dynamic object, these relocations
10303 are copied into the output file to be resolved at run
10304 time. */
10305
10306 skip = FALSE;
10307 relocate = FALSE;
10308
10309 out_off = _bfd_elf_section_offset (output_bfd, info,
10310 input_section, rel->r_offset);
10311 if (out_off == (bfd_vma) -1)
10312 skip = TRUE;
10313 else if (out_off == (bfd_vma) -2)
10314 skip = TRUE, relocate = TRUE;
10315 out_off += (input_section->output_section->vma
10316 + input_section->output_offset);
10317 outrel.r_offset = out_off;
10318 outrel.r_addend = rel->r_addend;
10319
10320 /* Optimize unaligned reloc use. */
10321 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10322 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10323 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10324 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10325 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10326 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10327 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10328 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10329 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10330
10331 if (skip)
10332 memset (&outrel, 0, sizeof outrel);
10333 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10334 && !is_opd
10335 && r_type != R_PPC64_TOC)
10336 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10337 else
10338 {
10339 /* This symbol is local, or marked to become local,
10340 or this is an opd section reloc which must point
10341 at a local function. */
10342 outrel.r_addend += relocation;
10343 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10344 {
10345 if (is_opd && h != NULL)
10346 {
10347 /* Lie about opd entries. This case occurs
10348 when building shared libraries and we
10349 reference a function in another shared
10350 lib. The same thing happens for a weak
10351 definition in an application that's
10352 overridden by a strong definition in a
10353 shared lib. (I believe this is a generic
10354 bug in binutils handling of weak syms.)
10355 In these cases we won't use the opd
10356 entry in this lib. */
10357 unresolved_reloc = FALSE;
10358 }
10359 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10360
10361 /* We need to relocate .opd contents for ld.so.
10362 Prelink also wants simple and consistent rules
10363 for relocs. This make all RELATIVE relocs have
10364 *r_offset equal to r_addend. */
10365 relocate = TRUE;
10366 }
10367 else
10368 {
10369 long indx = 0;
10370
10371 if (bfd_is_abs_section (sec))
10372 ;
10373 else if (sec == NULL || sec->owner == NULL)
10374 {
10375 bfd_set_error (bfd_error_bad_value);
10376 return FALSE;
10377 }
10378 else
10379 {
10380 asection *osec;
10381
10382 osec = sec->output_section;
10383 indx = elf_section_data (osec)->dynindx;
10384
10385 /* We are turning this relocation into one
10386 against a section symbol, so subtract out
10387 the output section's address but not the
10388 offset of the input section in the output
10389 section. */
10390 outrel.r_addend -= osec->vma;
10391 }
10392
10393 outrel.r_info = ELF64_R_INFO (indx, r_type);
10394 }
10395 }
10396
10397 sreloc = elf_section_data (input_section)->sreloc;
10398 if (sreloc == NULL)
10399 abort ();
10400
10401 loc = sreloc->contents;
10402 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10403 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10404
10405 /* If this reloc is against an external symbol, it will
10406 be computed at runtime, so there's no need to do
10407 anything now. However, for the sake of prelink ensure
10408 that the section contents are a known value. */
10409 if (! relocate)
10410 {
10411 unresolved_reloc = FALSE;
10412 /* The value chosen here is quite arbitrary as ld.so
10413 ignores section contents except for the special
10414 case of .opd where the contents might be accessed
10415 before relocation. Choose zero, as that won't
10416 cause reloc overflow. */
10417 relocation = 0;
10418 addend = 0;
10419 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10420 to improve backward compatibility with older
10421 versions of ld. */
10422 if (r_type == R_PPC64_ADDR64)
10423 addend = outrel.r_addend;
10424 /* Adjust pc_relative relocs to have zero in *r_offset. */
10425 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10426 addend = (input_section->output_section->vma
10427 + input_section->output_offset
10428 + rel->r_offset);
10429 }
10430 }
10431 break;
10432
10433 case R_PPC64_COPY:
10434 case R_PPC64_GLOB_DAT:
10435 case R_PPC64_JMP_SLOT:
10436 case R_PPC64_RELATIVE:
10437 /* We shouldn't ever see these dynamic relocs in relocatable
10438 files. */
10439 /* Fall through. */
10440
10441 case R_PPC64_PLTGOT16:
10442 case R_PPC64_PLTGOT16_DS:
10443 case R_PPC64_PLTGOT16_HA:
10444 case R_PPC64_PLTGOT16_HI:
10445 case R_PPC64_PLTGOT16_LO:
10446 case R_PPC64_PLTGOT16_LO_DS:
10447 case R_PPC64_PLTREL32:
10448 case R_PPC64_PLTREL64:
10449 /* These ones haven't been implemented yet. */
10450
10451 (*_bfd_error_handler)
10452 (_("%B: relocation %s is not supported for symbol %s."),
10453 input_bfd,
10454 ppc64_elf_howto_table[r_type]->name, sym_name);
10455
10456 bfd_set_error (bfd_error_invalid_operation);
10457 ret = FALSE;
10458 continue;
10459 }
10460
10461 /* Do any further special processing. */
10462 switch (r_type)
10463 {
10464 default:
10465 break;
10466
10467 case R_PPC64_ADDR16_HA:
10468 case R_PPC64_ADDR16_HIGHERA:
10469 case R_PPC64_ADDR16_HIGHESTA:
10470 case R_PPC64_GOT16_HA:
10471 case R_PPC64_PLTGOT16_HA:
10472 case R_PPC64_PLT16_HA:
10473 case R_PPC64_TOC16_HA:
10474 case R_PPC64_SECTOFF_HA:
10475 case R_PPC64_TPREL16_HA:
10476 case R_PPC64_DTPREL16_HA:
10477 case R_PPC64_GOT_TLSGD16_HA:
10478 case R_PPC64_GOT_TLSLD16_HA:
10479 case R_PPC64_GOT_TPREL16_HA:
10480 case R_PPC64_GOT_DTPREL16_HA:
10481 case R_PPC64_TPREL16_HIGHER:
10482 case R_PPC64_TPREL16_HIGHERA:
10483 case R_PPC64_TPREL16_HIGHEST:
10484 case R_PPC64_TPREL16_HIGHESTA:
10485 case R_PPC64_DTPREL16_HIGHER:
10486 case R_PPC64_DTPREL16_HIGHERA:
10487 case R_PPC64_DTPREL16_HIGHEST:
10488 case R_PPC64_DTPREL16_HIGHESTA:
10489 /* It's just possible that this symbol is a weak symbol
10490 that's not actually defined anywhere. In that case,
10491 'sec' would be NULL, and we should leave the symbol
10492 alone (it will be set to zero elsewhere in the link). */
10493 if (sec != NULL)
10494 /* Add 0x10000 if sign bit in 0:15 is set.
10495 Bits 0:15 are not used. */
10496 addend += 0x8000;
10497 break;
10498
10499 case R_PPC64_ADDR16_DS:
10500 case R_PPC64_ADDR16_LO_DS:
10501 case R_PPC64_GOT16_DS:
10502 case R_PPC64_GOT16_LO_DS:
10503 case R_PPC64_PLT16_LO_DS:
10504 case R_PPC64_SECTOFF_DS:
10505 case R_PPC64_SECTOFF_LO_DS:
10506 case R_PPC64_TOC16_DS:
10507 case R_PPC64_TOC16_LO_DS:
10508 case R_PPC64_PLTGOT16_DS:
10509 case R_PPC64_PLTGOT16_LO_DS:
10510 case R_PPC64_GOT_TPREL16_DS:
10511 case R_PPC64_GOT_TPREL16_LO_DS:
10512 case R_PPC64_GOT_DTPREL16_DS:
10513 case R_PPC64_GOT_DTPREL16_LO_DS:
10514 case R_PPC64_TPREL16_DS:
10515 case R_PPC64_TPREL16_LO_DS:
10516 case R_PPC64_DTPREL16_DS:
10517 case R_PPC64_DTPREL16_LO_DS:
10518 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10519 mask = 3;
10520 /* If this reloc is against an lq insn, then the value must be
10521 a multiple of 16. This is somewhat of a hack, but the
10522 "correct" way to do this by defining _DQ forms of all the
10523 _DS relocs bloats all reloc switches in this file. It
10524 doesn't seem to make much sense to use any of these relocs
10525 in data, so testing the insn should be safe. */
10526 if ((insn & (0x3f << 26)) == (56u << 26))
10527 mask = 15;
10528 if (((relocation + addend) & mask) != 0)
10529 {
10530 (*_bfd_error_handler)
10531 (_("%B: error: relocation %s not a multiple of %d"),
10532 input_bfd,
10533 ppc64_elf_howto_table[r_type]->name,
10534 mask + 1);
10535 bfd_set_error (bfd_error_bad_value);
10536 ret = FALSE;
10537 continue;
10538 }
10539 break;
10540 }
10541
10542 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10543 because such sections are not SEC_ALLOC and thus ld.so will
10544 not process them. */
10545 if (unresolved_reloc
10546 && !((input_section->flags & SEC_DEBUGGING) != 0
10547 && h->elf.def_dynamic))
10548 {
10549 (*_bfd_error_handler)
10550 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10551 input_bfd,
10552 input_section,
10553 (long) rel->r_offset,
10554 ppc64_elf_howto_table[(int) r_type]->name,
10555 h->elf.root.root.string);
10556 ret = FALSE;
10557 }
10558
10559 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10560 input_bfd,
10561 input_section,
10562 contents,
10563 rel->r_offset,
10564 relocation,
10565 addend);
10566
10567 if (r != bfd_reloc_ok)
10568 {
10569 if (sym_name == NULL)
10570 sym_name = "(null)";
10571 if (r == bfd_reloc_overflow)
10572 {
10573 if (warned)
10574 continue;
10575 if (h != NULL
10576 && h->elf.root.type == bfd_link_hash_undefweak
10577 && ppc64_elf_howto_table[r_type]->pc_relative)
10578 {
10579 /* Assume this is a call protected by other code that
10580 detects the symbol is undefined. If this is the case,
10581 we can safely ignore the overflow. If not, the
10582 program is hosed anyway, and a little warning isn't
10583 going to help. */
10584
10585 continue;
10586 }
10587
10588 if (!((*info->callbacks->reloc_overflow)
10589 (info, (h ? &h->elf.root : NULL), sym_name,
10590 ppc64_elf_howto_table[r_type]->name,
10591 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10592 return FALSE;
10593 }
10594 else
10595 {
10596 (*_bfd_error_handler)
10597 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10598 input_bfd,
10599 input_section,
10600 (long) rel->r_offset,
10601 ppc64_elf_howto_table[r_type]->name,
10602 sym_name,
10603 (int) r);
10604 ret = FALSE;
10605 }
10606 }
10607 }
10608
10609 /* If we're emitting relocations, then shortly after this function
10610 returns, reloc offsets and addends for this section will be
10611 adjusted. Worse, reloc symbol indices will be for the output
10612 file rather than the input. Save a copy of the relocs for
10613 opd_entry_value. */
10614 if (is_opd && info->emitrelocations)
10615 {
10616 bfd_size_type amt;
10617 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10618 rel = bfd_alloc (input_bfd, amt);
10619 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10620 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10621 if (rel == NULL)
10622 return FALSE;
10623 memcpy (rel, relocs, amt);
10624 }
10625 return ret;
10626 }
10627
10628 /* Adjust the value of any local symbols in opd sections. */
10629
10630 static bfd_boolean
10631 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10632 const char *name ATTRIBUTE_UNUSED,
10633 Elf_Internal_Sym *elfsym,
10634 asection *input_sec,
10635 struct elf_link_hash_entry *h)
10636 {
10637 long *opd_adjust, adjust;
10638 bfd_vma value;
10639
10640 if (h != NULL)
10641 return TRUE;
10642
10643 opd_adjust = get_opd_info (input_sec);
10644 if (opd_adjust == NULL)
10645 return TRUE;
10646
10647 value = elfsym->st_value - input_sec->output_offset;
10648 if (!info->relocatable)
10649 value -= input_sec->output_section->vma;
10650
10651 adjust = opd_adjust[value / 8];
10652 if (adjust == -1)
10653 elfsym->st_value = 0;
10654 else
10655 elfsym->st_value += adjust;
10656 return TRUE;
10657 }
10658
10659 /* Finish up dynamic symbol handling. We set the contents of various
10660 dynamic sections here. */
10661
10662 static bfd_boolean
10663 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10664 struct bfd_link_info *info,
10665 struct elf_link_hash_entry *h,
10666 Elf_Internal_Sym *sym)
10667 {
10668 struct ppc_link_hash_table *htab;
10669 bfd *dynobj;
10670 struct plt_entry *ent;
10671 Elf_Internal_Rela rela;
10672 bfd_byte *loc;
10673
10674 htab = ppc_hash_table (info);
10675 dynobj = htab->elf.dynobj;
10676
10677 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10678 if (ent->plt.offset != (bfd_vma) -1)
10679 {
10680 /* This symbol has an entry in the procedure linkage
10681 table. Set it up. */
10682
10683 if (htab->plt == NULL
10684 || htab->relplt == NULL
10685 || htab->glink == NULL)
10686 abort ();
10687
10688 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10689 fill in the PLT entry. */
10690 rela.r_offset = (htab->plt->output_section->vma
10691 + htab->plt->output_offset
10692 + ent->plt.offset);
10693 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10694 rela.r_addend = ent->addend;
10695
10696 loc = htab->relplt->contents;
10697 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10698 * sizeof (Elf64_External_Rela));
10699 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10700 }
10701
10702 if (h->needs_copy)
10703 {
10704 Elf_Internal_Rela rela;
10705 bfd_byte *loc;
10706
10707 /* This symbol needs a copy reloc. Set it up. */
10708
10709 if (h->dynindx == -1
10710 || (h->root.type != bfd_link_hash_defined
10711 && h->root.type != bfd_link_hash_defweak)
10712 || htab->relbss == NULL)
10713 abort ();
10714
10715 rela.r_offset = (h->root.u.def.value
10716 + h->root.u.def.section->output_section->vma
10717 + h->root.u.def.section->output_offset);
10718 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10719 rela.r_addend = 0;
10720 loc = htab->relbss->contents;
10721 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10722 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10723 }
10724
10725 /* Mark some specially defined symbols as absolute. */
10726 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10727 sym->st_shndx = SHN_ABS;
10728
10729 return TRUE;
10730 }
10731
10732 /* Used to decide how to sort relocs in an optimal manner for the
10733 dynamic linker, before writing them out. */
10734
10735 static enum elf_reloc_type_class
10736 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10737 {
10738 enum elf_ppc64_reloc_type r_type;
10739
10740 r_type = ELF64_R_TYPE (rela->r_info);
10741 switch (r_type)
10742 {
10743 case R_PPC64_RELATIVE:
10744 return reloc_class_relative;
10745 case R_PPC64_JMP_SLOT:
10746 return reloc_class_plt;
10747 case R_PPC64_COPY:
10748 return reloc_class_copy;
10749 default:
10750 return reloc_class_normal;
10751 }
10752 }
10753
10754 /* Finish up the dynamic sections. */
10755
10756 static bfd_boolean
10757 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10758 struct bfd_link_info *info)
10759 {
10760 struct ppc_link_hash_table *htab;
10761 bfd *dynobj;
10762 asection *sdyn;
10763
10764 htab = ppc_hash_table (info);
10765 dynobj = htab->elf.dynobj;
10766 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10767
10768 if (htab->elf.dynamic_sections_created)
10769 {
10770 Elf64_External_Dyn *dyncon, *dynconend;
10771
10772 if (sdyn == NULL || htab->got == NULL)
10773 abort ();
10774
10775 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10776 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10777 for (; dyncon < dynconend; dyncon++)
10778 {
10779 Elf_Internal_Dyn dyn;
10780 asection *s;
10781
10782 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
10783
10784 switch (dyn.d_tag)
10785 {
10786 default:
10787 continue;
10788
10789 case DT_PPC64_GLINK:
10790 s = htab->glink;
10791 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10792 /* We stupidly defined DT_PPC64_GLINK to be the start
10793 of glink rather than the first entry point, which is
10794 what ld.so needs, and now have a bigger stub to
10795 support automatic multiple TOCs. */
10796 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
10797 break;
10798
10799 case DT_PPC64_OPD:
10800 s = bfd_get_section_by_name (output_bfd, ".opd");
10801 if (s == NULL)
10802 continue;
10803 dyn.d_un.d_ptr = s->vma;
10804 break;
10805
10806 case DT_PPC64_OPDSZ:
10807 s = bfd_get_section_by_name (output_bfd, ".opd");
10808 if (s == NULL)
10809 continue;
10810 dyn.d_un.d_val = s->size;
10811 break;
10812
10813 case DT_PLTGOT:
10814 s = htab->plt;
10815 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10816 break;
10817
10818 case DT_JMPREL:
10819 s = htab->relplt;
10820 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10821 break;
10822
10823 case DT_PLTRELSZ:
10824 dyn.d_un.d_val = htab->relplt->size;
10825 break;
10826
10827 case DT_RELASZ:
10828 /* Don't count procedure linkage table relocs in the
10829 overall reloc count. */
10830 s = htab->relplt;
10831 if (s == NULL)
10832 continue;
10833 dyn.d_un.d_val -= s->size;
10834 break;
10835
10836 case DT_RELA:
10837 /* We may not be using the standard ELF linker script.
10838 If .rela.plt is the first .rela section, we adjust
10839 DT_RELA to not include it. */
10840 s = htab->relplt;
10841 if (s == NULL)
10842 continue;
10843 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
10844 continue;
10845 dyn.d_un.d_ptr += s->size;
10846 break;
10847 }
10848
10849 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
10850 }
10851 }
10852
10853 if (htab->got != NULL && htab->got->size != 0)
10854 {
10855 /* Fill in the first entry in the global offset table.
10856 We use it to hold the link-time TOCbase. */
10857 bfd_put_64 (output_bfd,
10858 elf_gp (output_bfd) + TOC_BASE_OFF,
10859 htab->got->contents);
10860
10861 /* Set .got entry size. */
10862 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
10863 }
10864
10865 if (htab->plt != NULL && htab->plt->size != 0)
10866 {
10867 /* Set .plt entry size. */
10868 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
10869 = PLT_ENTRY_SIZE;
10870 }
10871
10872 /* We need to handle writing out multiple GOT sections ourselves,
10873 since we didn't add them to DYNOBJ. We know dynobj is the first
10874 bfd. */
10875 while ((dynobj = dynobj->link_next) != NULL)
10876 {
10877 asection *s;
10878
10879 if (!is_ppc64_elf_target (dynobj->xvec))
10880 continue;
10881
10882 s = ppc64_elf_tdata (dynobj)->got;
10883 if (s != NULL
10884 && s->size != 0
10885 && s->output_section != bfd_abs_section_ptr
10886 && !bfd_set_section_contents (output_bfd, s->output_section,
10887 s->contents, s->output_offset,
10888 s->size))
10889 return FALSE;
10890 s = ppc64_elf_tdata (dynobj)->relgot;
10891 if (s != NULL
10892 && s->size != 0
10893 && s->output_section != bfd_abs_section_ptr
10894 && !bfd_set_section_contents (output_bfd, s->output_section,
10895 s->contents, s->output_offset,
10896 s->size))
10897 return FALSE;
10898 }
10899
10900 return TRUE;
10901 }
10902
10903 #include "elf64-target.h"
GDB Binutils - Deliverables
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