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2005-05-05 H.J. Lu <hongjiu.lu@intel.com>
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define elf_info_to_howto ppc64_elf_info_to_howto
65
66 #define elf_backend_want_got_sym 0
67 #define elf_backend_want_plt_sym 0
68 #define elf_backend_plt_alignment 3
69 #define elf_backend_plt_not_loaded 1
70 #define elf_backend_got_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 -1;
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 if (relcount == 0)
2762 goto done;
2763
2764 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2765 {
2766 count = -1;
2767 goto done;
2768 }
2769
2770 size = 0;
2771 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2772 {
2773 asymbol *sym;
2774
2775 while (r < opd->relocation + relcount
2776 && r->address < syms[i]->value + opd->vma)
2777 ++r;
2778
2779 if (r == opd->relocation + relcount)
2780 break;
2781
2782 if (r->address != syms[i]->value + opd->vma)
2783 continue;
2784
2785 if (r->howto->type != R_PPC64_ADDR64)
2786 continue;
2787
2788 sym = *r->sym_ptr_ptr;
2789 if (!sym_exists_at (syms, opdsymend, symcount,
2790 sym->section->id, sym->value + r->addend))
2791 {
2792 ++count;
2793 size += sizeof (asymbol);
2794 size += strlen (syms[i]->name) + 2;
2795 }
2796 }
2797
2798 s = *ret = bfd_malloc (size);
2799 if (s == NULL)
2800 {
2801 count = -1;
2802 goto done;
2803 }
2804
2805 names = (char *) (s + count);
2806
2807 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2808 {
2809 asymbol *sym;
2810
2811 while (r < opd->relocation + relcount
2812 && r->address < syms[i]->value + opd->vma)
2813 ++r;
2814
2815 if (r == opd->relocation + relcount)
2816 break;
2817
2818 if (r->address != syms[i]->value + opd->vma)
2819 continue;
2820
2821 if (r->howto->type != R_PPC64_ADDR64)
2822 continue;
2823
2824 sym = *r->sym_ptr_ptr;
2825 if (!sym_exists_at (syms, opdsymend, symcount,
2826 sym->section->id, sym->value + r->addend))
2827 {
2828 size_t len;
2829
2830 *s = *syms[i];
2831 s->section = sym->section;
2832 s->value = sym->value + r->addend;
2833 s->name = names;
2834 *names++ = '.';
2835 len = strlen (syms[i]->name);
2836 memcpy (names, syms[i]->name, len + 1);
2837 names += len + 1;
2838 s++;
2839 }
2840 }
2841 }
2842 else
2843 {
2844 bfd_byte *contents;
2845 size_t size;
2846
2847 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2848 {
2849 if (contents)
2850 {
2851 free_contents_and_exit:
2852 free (contents);
2853 }
2854 count = -1;
2855 goto done;
2856 }
2857
2858 size = 0;
2859 for (i = secsymend; i < opdsymend; ++i)
2860 {
2861 bfd_vma ent;
2862
2863 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2864 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2865 {
2866 ++count;
2867 size += sizeof (asymbol);
2868 size += strlen (syms[i]->name) + 2;
2869 }
2870 }
2871
2872 s = *ret = bfd_malloc (size);
2873 if (s == NULL)
2874 goto free_contents_and_exit;
2875
2876 names = (char *) (s + count);
2877
2878 for (i = secsymend; i < opdsymend; ++i)
2879 {
2880 bfd_vma ent;
2881
2882 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2883 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2884 {
2885 long lo, hi;
2886 size_t len;
2887 asection *sec = abfd->sections;
2888
2889 *s = *syms[i];
2890 lo = codesecsym;
2891 hi = codesecsymend;
2892 while (lo < hi)
2893 {
2894 long mid = (lo + hi) >> 1;
2895 if (syms[mid]->section->vma < ent)
2896 lo = mid + 1;
2897 else if (syms[mid]->section->vma > ent)
2898 hi = mid;
2899 else
2900 {
2901 sec = syms[mid]->section;
2902 break;
2903 }
2904 }
2905
2906 if (lo >= hi && lo > codesecsym)
2907 sec = syms[lo - 1]->section;
2908
2909 for (; sec != NULL; sec = sec->next)
2910 {
2911 if (sec->vma > ent)
2912 break;
2913 if ((sec->flags & SEC_ALLOC) == 0
2914 || (sec->flags & SEC_LOAD) == 0)
2915 break;
2916 if ((sec->flags & SEC_CODE) != 0)
2917 s->section = sec;
2918 }
2919 s->value = ent - s->section->vma;
2920 s->name = names;
2921 *names++ = '.';
2922 len = strlen (syms[i]->name);
2923 memcpy (names, syms[i]->name, len + 1);
2924 names += len + 1;
2925 s++;
2926 }
2927 }
2928 free (contents);
2929 }
2930
2931 done:
2932 free (syms);
2933 return count;
2934 }
2935 \f
2936 /* The following functions are specific to the ELF linker, while
2937 functions above are used generally. Those named ppc64_elf_* are
2938 called by the main ELF linker code. They appear in this file more
2939 or less in the order in which they are called. eg.
2940 ppc64_elf_check_relocs is called early in the link process,
2941 ppc64_elf_finish_dynamic_sections is one of the last functions
2942 called.
2943
2944 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2945 functions have both a function code symbol and a function descriptor
2946 symbol. A call to foo in a relocatable object file looks like:
2947
2948 . .text
2949 . x:
2950 . bl .foo
2951 . nop
2952
2953 The function definition in another object file might be:
2954
2955 . .section .opd
2956 . foo: .quad .foo
2957 . .quad .TOC.@tocbase
2958 . .quad 0
2959 .
2960 . .text
2961 . .foo: blr
2962
2963 When the linker resolves the call during a static link, the branch
2964 unsurprisingly just goes to .foo and the .opd information is unused.
2965 If the function definition is in a shared library, things are a little
2966 different: The call goes via a plt call stub, the opd information gets
2967 copied to the plt, and the linker patches the nop.
2968
2969 . x:
2970 . bl .foo_stub
2971 . ld 2,40(1)
2972 .
2973 .
2974 . .foo_stub:
2975 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2976 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2977 . std 2,40(1) # this is the general idea
2978 . ld 11,0(12)
2979 . ld 2,8(12)
2980 . mtctr 11
2981 . ld 11,16(12)
2982 . bctr
2983 .
2984 . .section .plt
2985 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2986
2987 The "reloc ()" notation is supposed to indicate that the linker emits
2988 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2989 copying.
2990
2991 What are the difficulties here? Well, firstly, the relocations
2992 examined by the linker in check_relocs are against the function code
2993 sym .foo, while the dynamic relocation in the plt is emitted against
2994 the function descriptor symbol, foo. Somewhere along the line, we need
2995 to carefully copy dynamic link information from one symbol to the other.
2996 Secondly, the generic part of the elf linker will make .foo a dynamic
2997 symbol as is normal for most other backends. We need foo dynamic
2998 instead, at least for an application final link. However, when
2999 creating a shared library containing foo, we need to have both symbols
3000 dynamic so that references to .foo are satisfied during the early
3001 stages of linking. Otherwise the linker might decide to pull in a
3002 definition from some other object, eg. a static library.
3003
3004 Update: As of August 2004, we support a new convention. Function
3005 calls may use the function descriptor symbol, ie. "bl foo". This
3006 behaves exactly as "bl .foo". */
3007
3008 /* The linker needs to keep track of the number of relocs that it
3009 decides to copy as dynamic relocs in check_relocs for each symbol.
3010 This is so that it can later discard them if they are found to be
3011 unnecessary. We store the information in a field extending the
3012 regular ELF linker hash table. */
3013
3014 struct ppc_dyn_relocs
3015 {
3016 struct ppc_dyn_relocs *next;
3017
3018 /* The input section of the reloc. */
3019 asection *sec;
3020
3021 /* Total number of relocs copied for the input section. */
3022 bfd_size_type count;
3023
3024 /* Number of pc-relative relocs copied for the input section. */
3025 bfd_size_type pc_count;
3026 };
3027
3028 /* Track GOT entries needed for a given symbol. We might need more
3029 than one got entry per symbol. */
3030 struct got_entry
3031 {
3032 struct got_entry *next;
3033
3034 /* The symbol addend that we'll be placing in the GOT. */
3035 bfd_vma addend;
3036
3037 /* Unlike other ELF targets, we use separate GOT entries for the same
3038 symbol referenced from different input files. This is to support
3039 automatic multiple TOC/GOT sections, where the TOC base can vary
3040 from one input file to another.
3041
3042 Point to the BFD owning this GOT entry. */
3043 bfd *owner;
3044
3045 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3046 TLS_TPREL or TLS_DTPREL for tls entries. */
3047 char tls_type;
3048
3049 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3050 union
3051 {
3052 bfd_signed_vma refcount;
3053 bfd_vma offset;
3054 } got;
3055 };
3056
3057 /* The same for PLT. */
3058 struct plt_entry
3059 {
3060 struct plt_entry *next;
3061
3062 bfd_vma addend;
3063
3064 union
3065 {
3066 bfd_signed_vma refcount;
3067 bfd_vma offset;
3068 } plt;
3069 };
3070
3071 /* Of those relocs that might be copied as dynamic relocs, this macro
3072 selects those that must be copied when linking a shared library,
3073 even when the symbol is local. */
3074
3075 #define MUST_BE_DYN_RELOC(RTYPE) \
3076 ((RTYPE) != R_PPC64_REL32 \
3077 && (RTYPE) != R_PPC64_REL64 \
3078 && (RTYPE) != R_PPC64_REL30)
3079
3080 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3081 copying dynamic variables from a shared lib into an app's dynbss
3082 section, and instead use a dynamic relocation to point into the
3083 shared lib. With code that gcc generates, it's vital that this be
3084 enabled; In the PowerPC64 ABI, the address of a function is actually
3085 the address of a function descriptor, which resides in the .opd
3086 section. gcc uses the descriptor directly rather than going via the
3087 GOT as some other ABI's do, which means that initialized function
3088 pointers must reference the descriptor. Thus, a function pointer
3089 initialized to the address of a function in a shared library will
3090 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3091 redefines the function descriptor symbol to point to the copy. This
3092 presents a problem as a plt entry for that function is also
3093 initialized from the function descriptor symbol and the copy reloc
3094 may not be initialized first. */
3095 #define ELIMINATE_COPY_RELOCS 1
3096
3097 /* Section name for stubs is the associated section name plus this
3098 string. */
3099 #define STUB_SUFFIX ".stub"
3100
3101 /* Linker stubs.
3102 ppc_stub_long_branch:
3103 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3104 destination, but a 24 bit branch in a stub section will reach.
3105 . b dest
3106
3107 ppc_stub_plt_branch:
3108 Similar to the above, but a 24 bit branch in the stub section won't
3109 reach its destination.
3110 . addis %r12,%r2,xxx@toc@ha
3111 . ld %r11,xxx@toc@l(%r12)
3112 . mtctr %r11
3113 . bctr
3114
3115 ppc_stub_plt_call:
3116 Used to call a function in a shared library. If it so happens that
3117 the plt entry referenced crosses a 64k boundary, then an extra
3118 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3119 xxx+16 as appropriate.
3120 . addis %r12,%r2,xxx@toc@ha
3121 . std %r2,40(%r1)
3122 . ld %r11,xxx+0@toc@l(%r12)
3123 . ld %r2,xxx+8@toc@l(%r12)
3124 . mtctr %r11
3125 . ld %r11,xxx+16@toc@l(%r12)
3126 . bctr
3127
3128 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3129 code to adjust the value and save r2 to support multiple toc sections.
3130 A ppc_stub_long_branch with an r2 offset looks like:
3131 . std %r2,40(%r1)
3132 . addis %r2,%r2,off@ha
3133 . addi %r2,%r2,off@l
3134 . b dest
3135
3136 A ppc_stub_plt_branch with an r2 offset looks like:
3137 . std %r2,40(%r1)
3138 . addis %r12,%r2,xxx@toc@ha
3139 . ld %r11,xxx@toc@l(%r12)
3140 . addis %r2,%r2,off@ha
3141 . addi %r2,%r2,off@l
3142 . mtctr %r11
3143 . bctr
3144 */
3145
3146 enum ppc_stub_type {
3147 ppc_stub_none,
3148 ppc_stub_long_branch,
3149 ppc_stub_long_branch_r2off,
3150 ppc_stub_plt_branch,
3151 ppc_stub_plt_branch_r2off,
3152 ppc_stub_plt_call
3153 };
3154
3155 struct ppc_stub_hash_entry {
3156
3157 /* Base hash table entry structure. */
3158 struct bfd_hash_entry root;
3159
3160 enum ppc_stub_type stub_type;
3161
3162 /* The stub section. */
3163 asection *stub_sec;
3164
3165 /* Offset within stub_sec of the beginning of this stub. */
3166 bfd_vma stub_offset;
3167
3168 /* Given the symbol's value and its section we can determine its final
3169 value when building the stubs (so the stub knows where to jump. */
3170 bfd_vma target_value;
3171 asection *target_section;
3172
3173 /* The symbol table entry, if any, that this was derived from. */
3174 struct ppc_link_hash_entry *h;
3175
3176 /* And the reloc addend that this was derived from. */
3177 bfd_vma addend;
3178
3179 /* Where this stub is being called from, or, in the case of combined
3180 stub sections, the first input section in the group. */
3181 asection *id_sec;
3182 };
3183
3184 struct ppc_branch_hash_entry {
3185
3186 /* Base hash table entry structure. */
3187 struct bfd_hash_entry root;
3188
3189 /* Offset within .branch_lt. */
3190 unsigned int offset;
3191
3192 /* Generation marker. */
3193 unsigned int iter;
3194 };
3195
3196 struct ppc_link_hash_entry
3197 {
3198 struct elf_link_hash_entry elf;
3199
3200 /* A pointer to the most recently used stub hash entry against this
3201 symbol. */
3202 struct ppc_stub_hash_entry *stub_cache;
3203
3204 /* Track dynamic relocs copied for this symbol. */
3205 struct ppc_dyn_relocs *dyn_relocs;
3206
3207 /* Link between function code and descriptor symbols. */
3208 struct ppc_link_hash_entry *oh;
3209
3210 /* Flag function code and descriptor symbols. */
3211 unsigned int is_func:1;
3212 unsigned int is_func_descriptor:1;
3213 unsigned int fake:1;
3214
3215 /* Whether global opd/toc sym has been adjusted or not.
3216 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3217 should be set for all globals defined in any opd/toc section. */
3218 unsigned int adjust_done:1;
3219
3220 /* Set if we twiddled this symbol to weak at some stage. */
3221 unsigned int was_undefined:1;
3222
3223 /* Contexts in which symbol is used in the GOT (or TOC).
3224 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3225 corresponding relocs are encountered during check_relocs.
3226 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3227 indicate the corresponding GOT entry type is not needed.
3228 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3229 a TPREL one. We use a separate flag rather than setting TPREL
3230 just for convenience in distinguishing the two cases. */
3231 #define TLS_GD 1 /* GD reloc. */
3232 #define TLS_LD 2 /* LD reloc. */
3233 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3234 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3235 #define TLS_TLS 16 /* Any TLS reloc. */
3236 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3237 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3238 char tls_mask;
3239 };
3240
3241 /* ppc64 ELF linker hash table. */
3242
3243 struct ppc_link_hash_table
3244 {
3245 struct elf_link_hash_table elf;
3246
3247 /* The stub hash table. */
3248 struct bfd_hash_table stub_hash_table;
3249
3250 /* Another hash table for plt_branch stubs. */
3251 struct bfd_hash_table branch_hash_table;
3252
3253 /* Linker stub bfd. */
3254 bfd *stub_bfd;
3255
3256 /* Linker call-backs. */
3257 asection * (*add_stub_section) (const char *, asection *);
3258 void (*layout_sections_again) (void);
3259
3260 /* Array to keep track of which stub sections have been created, and
3261 information on stub grouping. */
3262 struct map_stub {
3263 /* This is the section to which stubs in the group will be attached. */
3264 asection *link_sec;
3265 /* The stub section. */
3266 asection *stub_sec;
3267 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3268 bfd_vma toc_off;
3269 } *stub_group;
3270
3271 /* Temp used when calculating TOC pointers. */
3272 bfd_vma toc_curr;
3273
3274 /* Highest input section id. */
3275 int top_id;
3276
3277 /* Highest output section index. */
3278 int top_index;
3279
3280 /* List of input sections for each output section. */
3281 asection **input_list;
3282
3283 /* Short-cuts to get to dynamic linker sections. */
3284 asection *got;
3285 asection *plt;
3286 asection *relplt;
3287 asection *dynbss;
3288 asection *relbss;
3289 asection *glink;
3290 asection *sfpr;
3291 asection *brlt;
3292 asection *relbrlt;
3293
3294 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3295 struct ppc_link_hash_entry *tls_get_addr;
3296 struct ppc_link_hash_entry *tls_get_addr_fd;
3297
3298 /* Statistics. */
3299 unsigned long stub_count[ppc_stub_plt_call];
3300
3301 /* Number of stubs against global syms. */
3302 unsigned long stub_globals;
3303
3304 /* Set if we should emit symbols for stubs. */
3305 unsigned int emit_stub_syms:1;
3306
3307 /* Support for multiple toc sections. */
3308 unsigned int no_multi_toc:1;
3309 unsigned int multi_toc_needed:1;
3310
3311 /* Set on error. */
3312 unsigned int stub_error:1;
3313
3314 /* Flag set when small branches are detected. Used to
3315 select suitable defaults for the stub group size. */
3316 unsigned int has_14bit_branch:1;
3317
3318 /* Temp used by ppc64_elf_check_directives. */
3319 unsigned int twiddled_syms:1;
3320
3321 /* Incremented every time we size stubs. */
3322 unsigned int stub_iteration;
3323
3324 /* Small local sym to section mapping cache. */
3325 struct sym_sec_cache sym_sec;
3326 };
3327
3328 /* Rename some of the generic section flags to better document how they
3329 are used here. */
3330 #define has_toc_reloc has_gp_reloc
3331 #define makes_toc_func_call need_finalize_relax
3332 #define call_check_in_progress reloc_done
3333
3334 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3335
3336 #define ppc_hash_table(p) \
3337 ((struct ppc_link_hash_table *) ((p)->hash))
3338
3339 #define ppc_stub_hash_lookup(table, string, create, copy) \
3340 ((struct ppc_stub_hash_entry *) \
3341 bfd_hash_lookup ((table), (string), (create), (copy)))
3342
3343 #define ppc_branch_hash_lookup(table, string, create, copy) \
3344 ((struct ppc_branch_hash_entry *) \
3345 bfd_hash_lookup ((table), (string), (create), (copy)))
3346
3347 /* Create an entry in the stub hash table. */
3348
3349 static struct bfd_hash_entry *
3350 stub_hash_newfunc (struct bfd_hash_entry *entry,
3351 struct bfd_hash_table *table,
3352 const char *string)
3353 {
3354 /* Allocate the structure if it has not already been allocated by a
3355 subclass. */
3356 if (entry == NULL)
3357 {
3358 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3359 if (entry == NULL)
3360 return entry;
3361 }
3362
3363 /* Call the allocation method of the superclass. */
3364 entry = bfd_hash_newfunc (entry, table, string);
3365 if (entry != NULL)
3366 {
3367 struct ppc_stub_hash_entry *eh;
3368
3369 /* Initialize the local fields. */
3370 eh = (struct ppc_stub_hash_entry *) entry;
3371 eh->stub_type = ppc_stub_none;
3372 eh->stub_sec = NULL;
3373 eh->stub_offset = 0;
3374 eh->target_value = 0;
3375 eh->target_section = NULL;
3376 eh->h = NULL;
3377 eh->id_sec = NULL;
3378 }
3379
3380 return entry;
3381 }
3382
3383 /* Create an entry in the branch hash table. */
3384
3385 static struct bfd_hash_entry *
3386 branch_hash_newfunc (struct bfd_hash_entry *entry,
3387 struct bfd_hash_table *table,
3388 const char *string)
3389 {
3390 /* Allocate the structure if it has not already been allocated by a
3391 subclass. */
3392 if (entry == NULL)
3393 {
3394 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3395 if (entry == NULL)
3396 return entry;
3397 }
3398
3399 /* Call the allocation method of the superclass. */
3400 entry = bfd_hash_newfunc (entry, table, string);
3401 if (entry != NULL)
3402 {
3403 struct ppc_branch_hash_entry *eh;
3404
3405 /* Initialize the local fields. */
3406 eh = (struct ppc_branch_hash_entry *) entry;
3407 eh->offset = 0;
3408 eh->iter = 0;
3409 }
3410
3411 return entry;
3412 }
3413
3414 /* Create an entry in a ppc64 ELF linker hash table. */
3415
3416 static struct bfd_hash_entry *
3417 link_hash_newfunc (struct bfd_hash_entry *entry,
3418 struct bfd_hash_table *table,
3419 const char *string)
3420 {
3421 /* Allocate the structure if it has not already been allocated by a
3422 subclass. */
3423 if (entry == NULL)
3424 {
3425 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3426 if (entry == NULL)
3427 return entry;
3428 }
3429
3430 /* Call the allocation method of the superclass. */
3431 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3432 if (entry != NULL)
3433 {
3434 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3435
3436 memset (&eh->stub_cache, 0,
3437 (sizeof (struct ppc_link_hash_entry)
3438 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3439 }
3440
3441 return entry;
3442 }
3443
3444 /* Create a ppc64 ELF linker hash table. */
3445
3446 static struct bfd_link_hash_table *
3447 ppc64_elf_link_hash_table_create (bfd *abfd)
3448 {
3449 struct ppc_link_hash_table *htab;
3450 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3451
3452 htab = bfd_zmalloc (amt);
3453 if (htab == NULL)
3454 return NULL;
3455
3456 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3457 {
3458 free (htab);
3459 return NULL;
3460 }
3461
3462 /* Init the stub hash table too. */
3463 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3464 return NULL;
3465
3466 /* And the branch hash table. */
3467 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3468 return NULL;
3469
3470 /* Initializing two fields of the union is just cosmetic. We really
3471 only care about glist, but when compiled on a 32-bit host the
3472 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3473 debugger inspection of these fields look nicer. */
3474 htab->elf.init_refcount.refcount = 0;
3475 htab->elf.init_refcount.glist = NULL;
3476 htab->elf.init_offset.offset = 0;
3477 htab->elf.init_offset.glist = NULL;
3478
3479 return &htab->elf.root;
3480 }
3481
3482 /* Free the derived linker hash table. */
3483
3484 static void
3485 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3486 {
3487 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3488
3489 bfd_hash_table_free (&ret->stub_hash_table);
3490 bfd_hash_table_free (&ret->branch_hash_table);
3491 _bfd_generic_link_hash_table_free (hash);
3492 }
3493
3494 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3495
3496 void
3497 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3498 {
3499 struct ppc_link_hash_table *htab;
3500
3501 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3502
3503 /* Always hook our dynamic sections into the first bfd, which is the
3504 linker created stub bfd. This ensures that the GOT header is at
3505 the start of the output TOC section. */
3506 htab = ppc_hash_table (info);
3507 htab->stub_bfd = abfd;
3508 htab->elf.dynobj = abfd;
3509 }
3510
3511 /* Build a name for an entry in the stub hash table. */
3512
3513 static char *
3514 ppc_stub_name (const asection *input_section,
3515 const asection *sym_sec,
3516 const struct ppc_link_hash_entry *h,
3517 const Elf_Internal_Rela *rel)
3518 {
3519 char *stub_name;
3520 bfd_size_type len;
3521
3522 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3523 offsets from a sym as a branch target? In fact, we could
3524 probably assume the addend is always zero. */
3525 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3526
3527 if (h)
3528 {
3529 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3530 stub_name = bfd_malloc (len);
3531 if (stub_name != NULL)
3532 {
3533 sprintf (stub_name, "%08x.%s+%x",
3534 input_section->id & 0xffffffff,
3535 h->elf.root.root.string,
3536 (int) rel->r_addend & 0xffffffff);
3537 }
3538 }
3539 else
3540 {
3541 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3542 stub_name = bfd_malloc (len);
3543 if (stub_name != NULL)
3544 {
3545 sprintf (stub_name, "%08x.%x:%x+%x",
3546 input_section->id & 0xffffffff,
3547 sym_sec->id & 0xffffffff,
3548 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3549 (int) rel->r_addend & 0xffffffff);
3550 }
3551 }
3552 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3553 stub_name[len - 2] = 0;
3554 return stub_name;
3555 }
3556
3557 /* Look up an entry in the stub hash. Stub entries are cached because
3558 creating the stub name takes a bit of time. */
3559
3560 static struct ppc_stub_hash_entry *
3561 ppc_get_stub_entry (const asection *input_section,
3562 const asection *sym_sec,
3563 struct ppc_link_hash_entry *h,
3564 const Elf_Internal_Rela *rel,
3565 struct ppc_link_hash_table *htab)
3566 {
3567 struct ppc_stub_hash_entry *stub_entry;
3568 const asection *id_sec;
3569
3570 /* If this input section is part of a group of sections sharing one
3571 stub section, then use the id of the first section in the group.
3572 Stub names need to include a section id, as there may well be
3573 more than one stub used to reach say, printf, and we need to
3574 distinguish between them. */
3575 id_sec = htab->stub_group[input_section->id].link_sec;
3576
3577 if (h != NULL && h->stub_cache != NULL
3578 && h->stub_cache->h == h
3579 && h->stub_cache->id_sec == id_sec)
3580 {
3581 stub_entry = h->stub_cache;
3582 }
3583 else
3584 {
3585 char *stub_name;
3586
3587 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3588 if (stub_name == NULL)
3589 return NULL;
3590
3591 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3592 stub_name, FALSE, FALSE);
3593 if (h != NULL)
3594 h->stub_cache = stub_entry;
3595
3596 free (stub_name);
3597 }
3598
3599 return stub_entry;
3600 }
3601
3602 /* Add a new stub entry to the stub hash. Not all fields of the new
3603 stub entry are initialised. */
3604
3605 static struct ppc_stub_hash_entry *
3606 ppc_add_stub (const char *stub_name,
3607 asection *section,
3608 struct ppc_link_hash_table *htab)
3609 {
3610 asection *link_sec;
3611 asection *stub_sec;
3612 struct ppc_stub_hash_entry *stub_entry;
3613
3614 link_sec = htab->stub_group[section->id].link_sec;
3615 stub_sec = htab->stub_group[section->id].stub_sec;
3616 if (stub_sec == NULL)
3617 {
3618 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3619 if (stub_sec == NULL)
3620 {
3621 size_t namelen;
3622 bfd_size_type len;
3623 char *s_name;
3624
3625 namelen = strlen (link_sec->name);
3626 len = namelen + sizeof (STUB_SUFFIX);
3627 s_name = bfd_alloc (htab->stub_bfd, len);
3628 if (s_name == NULL)
3629 return NULL;
3630
3631 memcpy (s_name, link_sec->name, namelen);
3632 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3633 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3634 if (stub_sec == NULL)
3635 return NULL;
3636 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3637 }
3638 htab->stub_group[section->id].stub_sec = stub_sec;
3639 }
3640
3641 /* Enter this entry into the linker stub hash table. */
3642 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3643 TRUE, FALSE);
3644 if (stub_entry == NULL)
3645 {
3646 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3647 section->owner, stub_name);
3648 return NULL;
3649 }
3650
3651 stub_entry->stub_sec = stub_sec;
3652 stub_entry->stub_offset = 0;
3653 stub_entry->id_sec = link_sec;
3654 return stub_entry;
3655 }
3656
3657 /* Create sections for linker generated code. */
3658
3659 static bfd_boolean
3660 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3661 {
3662 struct ppc_link_hash_table *htab;
3663 flagword flags;
3664
3665 htab = ppc_hash_table (info);
3666
3667 /* Create .sfpr for code to save and restore fp regs. */
3668 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3669 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3670 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3671 flags);
3672 if (htab->sfpr == NULL
3673 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3674 return FALSE;
3675
3676 /* Create .glink for lazy dynamic linking support. */
3677 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3678 flags);
3679 if (htab->glink == NULL
3680 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3681 return FALSE;
3682
3683 /* Create .branch_lt for plt_branch stubs. */
3684 flags = (SEC_ALLOC | SEC_LOAD
3685 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3686 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3687 flags);
3688 if (htab->brlt == NULL
3689 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3690 return FALSE;
3691
3692 if (info->shared || info->emitrelocations)
3693 {
3694 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3695 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3696 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3697 ".rela.branch_lt",
3698 flags);
3699 if (!htab->relbrlt
3700 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3701 return FALSE;
3702 }
3703 return TRUE;
3704 }
3705
3706 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3707 not already done. */
3708
3709 static bfd_boolean
3710 create_got_section (bfd *abfd, struct bfd_link_info *info)
3711 {
3712 asection *got, *relgot;
3713 flagword flags;
3714 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3715
3716 if (!htab->got)
3717 {
3718 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3719 return FALSE;
3720
3721 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3722 if (!htab->got)
3723 abort ();
3724 }
3725
3726 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3727 | SEC_LINKER_CREATED);
3728
3729 got = bfd_make_section_with_flags (abfd, ".got", flags);
3730 if (!got
3731 || !bfd_set_section_alignment (abfd, got, 3))
3732 return FALSE;
3733
3734 relgot = bfd_make_section_with_flags (abfd, ".rela.got",
3735 flags | SEC_READONLY);
3736 if (!relgot
3737 || ! bfd_set_section_alignment (abfd, relgot, 3))
3738 return FALSE;
3739
3740 ppc64_elf_tdata (abfd)->got = got;
3741 ppc64_elf_tdata (abfd)->relgot = relgot;
3742 return TRUE;
3743 }
3744
3745 /* Create the dynamic sections, and set up shortcuts. */
3746
3747 static bfd_boolean
3748 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3749 {
3750 struct ppc_link_hash_table *htab;
3751
3752 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3753 return FALSE;
3754
3755 htab = ppc_hash_table (info);
3756 if (!htab->got)
3757 htab->got = bfd_get_section_by_name (dynobj, ".got");
3758 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3759 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3760 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3761 if (!info->shared)
3762 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3763
3764 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3765 || (!info->shared && !htab->relbss))
3766 abort ();
3767
3768 return TRUE;
3769 }
3770
3771 /* Merge PLT info on FROM with that on TO. */
3772
3773 static void
3774 move_plt_plist (struct ppc_link_hash_entry *from,
3775 struct ppc_link_hash_entry *to)
3776 {
3777 if (from->elf.plt.plist != NULL)
3778 {
3779 if (to->elf.plt.plist != NULL)
3780 {
3781 struct plt_entry **entp;
3782 struct plt_entry *ent;
3783
3784 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3785 {
3786 struct plt_entry *dent;
3787
3788 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3789 if (dent->addend == ent->addend)
3790 {
3791 dent->plt.refcount += ent->plt.refcount;
3792 *entp = ent->next;
3793 break;
3794 }
3795 if (dent == NULL)
3796 entp = &ent->next;
3797 }
3798 *entp = to->elf.plt.plist;
3799 }
3800
3801 to->elf.plt.plist = from->elf.plt.plist;
3802 from->elf.plt.plist = NULL;
3803 }
3804 }
3805
3806 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3807
3808 static void
3809 ppc64_elf_copy_indirect_symbol
3810 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3811 struct elf_link_hash_entry *dir,
3812 struct elf_link_hash_entry *ind)
3813 {
3814 struct ppc_link_hash_entry *edir, *eind;
3815
3816 edir = (struct ppc_link_hash_entry *) dir;
3817 eind = (struct ppc_link_hash_entry *) ind;
3818
3819 /* Copy over any dynamic relocs we may have on the indirect sym. */
3820 if (eind->dyn_relocs != NULL)
3821 {
3822 if (edir->dyn_relocs != NULL)
3823 {
3824 struct ppc_dyn_relocs **pp;
3825 struct ppc_dyn_relocs *p;
3826
3827 if (eind->elf.root.type == bfd_link_hash_indirect)
3828 abort ();
3829
3830 /* Add reloc counts against the weak sym to the strong sym
3831 list. Merge any entries against the same section. */
3832 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3833 {
3834 struct ppc_dyn_relocs *q;
3835
3836 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3837 if (q->sec == p->sec)
3838 {
3839 q->pc_count += p->pc_count;
3840 q->count += p->count;
3841 *pp = p->next;
3842 break;
3843 }
3844 if (q == NULL)
3845 pp = &p->next;
3846 }
3847 *pp = edir->dyn_relocs;
3848 }
3849
3850 edir->dyn_relocs = eind->dyn_relocs;
3851 eind->dyn_relocs = NULL;
3852 }
3853
3854 edir->is_func |= eind->is_func;
3855 edir->is_func_descriptor |= eind->is_func_descriptor;
3856 edir->tls_mask |= eind->tls_mask;
3857
3858 /* If called to transfer flags for a weakdef during processing
3859 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3860 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3861 if (!(ELIMINATE_COPY_RELOCS
3862 && eind->elf.root.type != bfd_link_hash_indirect
3863 && edir->elf.dynamic_adjusted))
3864 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3865
3866 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3867 edir->elf.ref_regular |= eind->elf.ref_regular;
3868 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3869 edir->elf.needs_plt |= eind->elf.needs_plt;
3870
3871 /* If we were called to copy over info for a weak sym, that's all. */
3872 if (eind->elf.root.type != bfd_link_hash_indirect)
3873 return;
3874
3875 /* Copy over got entries that we may have already seen to the
3876 symbol which just became indirect. */
3877 if (eind->elf.got.glist != NULL)
3878 {
3879 if (edir->elf.got.glist != NULL)
3880 {
3881 struct got_entry **entp;
3882 struct got_entry *ent;
3883
3884 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3885 {
3886 struct got_entry *dent;
3887
3888 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3889 if (dent->addend == ent->addend
3890 && dent->owner == ent->owner
3891 && dent->tls_type == ent->tls_type)
3892 {
3893 dent->got.refcount += ent->got.refcount;
3894 *entp = ent->next;
3895 break;
3896 }
3897 if (dent == NULL)
3898 entp = &ent->next;
3899 }
3900 *entp = edir->elf.got.glist;
3901 }
3902
3903 edir->elf.got.glist = eind->elf.got.glist;
3904 eind->elf.got.glist = NULL;
3905 }
3906
3907 /* And plt entries. */
3908 move_plt_plist (eind, edir);
3909
3910 if (edir->elf.dynindx == -1)
3911 {
3912 edir->elf.dynindx = eind->elf.dynindx;
3913 edir->elf.dynstr_index = eind->elf.dynstr_index;
3914 eind->elf.dynindx = -1;
3915 eind->elf.dynstr_index = 0;
3916 }
3917 else
3918 BFD_ASSERT (eind->elf.dynindx == -1);
3919 }
3920
3921 /* Find the function descriptor hash entry from the given function code
3922 hash entry FH. Link the entries via their OH fields. */
3923
3924 static struct ppc_link_hash_entry *
3925 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3926 {
3927 struct ppc_link_hash_entry *fdh = fh->oh;
3928
3929 if (fdh == NULL)
3930 {
3931 const char *fd_name = fh->elf.root.root.string + 1;
3932
3933 fdh = (struct ppc_link_hash_entry *)
3934 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3935 if (fdh != NULL)
3936 {
3937 fdh->is_func_descriptor = 1;
3938 fdh->oh = fh;
3939 fh->is_func = 1;
3940 fh->oh = fdh;
3941 }
3942 }
3943
3944 return fdh;
3945 }
3946
3947 /* Make a fake function descriptor sym for the code sym FH. */
3948
3949 static struct ppc_link_hash_entry *
3950 make_fdh (struct bfd_link_info *info,
3951 struct ppc_link_hash_entry *fh)
3952 {
3953 bfd *abfd;
3954 asymbol *newsym;
3955 struct bfd_link_hash_entry *bh;
3956 struct ppc_link_hash_entry *fdh;
3957
3958 abfd = fh->elf.root.u.undef.abfd;
3959 newsym = bfd_make_empty_symbol (abfd);
3960 newsym->name = fh->elf.root.root.string + 1;
3961 newsym->section = bfd_und_section_ptr;
3962 newsym->value = 0;
3963 newsym->flags = BSF_WEAK;
3964
3965 bh = NULL;
3966 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
3967 newsym->flags, newsym->section,
3968 newsym->value, NULL, FALSE, FALSE,
3969 &bh))
3970 return NULL;
3971
3972 fdh = (struct ppc_link_hash_entry *) bh;
3973 fdh->elf.non_elf = 0;
3974 fdh->fake = 1;
3975 fdh->is_func_descriptor = 1;
3976 fdh->oh = fh;
3977 fh->is_func = 1;
3978 fh->oh = fdh;
3979 return fdh;
3980 }
3981
3982 /* Hacks to support old ABI code.
3983 When making function calls, old ABI code references function entry
3984 points (dot symbols), while new ABI code references the function
3985 descriptor symbol. We need to make any combination of reference and
3986 definition work together, without breaking archive linking.
3987
3988 For a defined function "foo" and an undefined call to "bar":
3989 An old object defines "foo" and ".foo", references ".bar" (possibly
3990 "bar" too).
3991 A new object defines "foo" and references "bar".
3992
3993 A new object thus has no problem with its undefined symbols being
3994 satisfied by definitions in an old object. On the other hand, the
3995 old object won't have ".bar" satisfied by a new object. */
3996
3997 /* Fix function descriptor symbols defined in .opd sections to be
3998 function type. */
3999
4000 static bfd_boolean
4001 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4002 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4003 Elf_Internal_Sym *isym,
4004 const char **name ATTRIBUTE_UNUSED,
4005 flagword *flags ATTRIBUTE_UNUSED,
4006 asection **sec,
4007 bfd_vma *value ATTRIBUTE_UNUSED)
4008 {
4009 if (*sec != NULL
4010 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4011 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4012 return TRUE;
4013 }
4014
4015 /* This function makes an old ABI object reference to ".bar" cause the
4016 inclusion of a new ABI object archive that defines "bar".
4017 NAME is a symbol defined in an archive. Return a symbol in the hash
4018 table that might be satisfied by the archive symbols. */
4019
4020 static struct elf_link_hash_entry *
4021 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4022 struct bfd_link_info *info,
4023 const char *name)
4024 {
4025 struct elf_link_hash_entry *h;
4026 char *dot_name;
4027 size_t len;
4028
4029 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4030 if (h != NULL
4031 /* Don't return this sym if it is a fake function descriptor
4032 created by add_symbol_adjust. */
4033 && !(h->root.type == bfd_link_hash_undefweak
4034 && ((struct ppc_link_hash_entry *) h)->fake))
4035 return h;
4036
4037 if (name[0] == '.')
4038 return h;
4039
4040 len = strlen (name);
4041 dot_name = bfd_alloc (abfd, len + 2);
4042 if (dot_name == NULL)
4043 return (struct elf_link_hash_entry *) 0 - 1;
4044 dot_name[0] = '.';
4045 memcpy (dot_name + 1, name, len + 1);
4046 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4047 bfd_release (abfd, dot_name);
4048 return h;
4049 }
4050
4051 /* This function satisfies all old ABI object references to ".bar" if a
4052 new ABI object defines "bar". Well, at least, undefined dot symbols
4053 are made weak. This stops later archive searches from including an
4054 object if we already have a function descriptor definition. It also
4055 prevents the linker complaining about undefined symbols.
4056 We also check and correct mismatched symbol visibility here. The
4057 most restrictive visibility of the function descriptor and the
4058 function entry symbol is used. */
4059
4060 struct add_symbol_adjust_data
4061 {
4062 struct bfd_link_info *info;
4063 bfd_boolean ok;
4064 };
4065
4066 static bfd_boolean
4067 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4068 {
4069 struct add_symbol_adjust_data *data;
4070 struct ppc_link_hash_table *htab;
4071 struct ppc_link_hash_entry *eh;
4072 struct ppc_link_hash_entry *fdh;
4073
4074 if (h->root.type == bfd_link_hash_indirect)
4075 return TRUE;
4076
4077 if (h->root.type == bfd_link_hash_warning)
4078 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4079
4080 if (h->root.root.string[0] != '.')
4081 return TRUE;
4082
4083 data = inf;
4084 htab = ppc_hash_table (data->info);
4085 eh = (struct ppc_link_hash_entry *) h;
4086 fdh = get_fdh (eh, htab);
4087 if (fdh == NULL
4088 && !data->info->relocatable
4089 && (eh->elf.root.type == bfd_link_hash_undefined
4090 || eh->elf.root.type == bfd_link_hash_undefweak)
4091 && eh->elf.ref_regular)
4092 {
4093 /* Make an undefweak function descriptor sym, which is enough to
4094 pull in an --as-needed shared lib, but won't cause link
4095 errors. Archives are handled elsewhere. */
4096 fdh = make_fdh (data->info, eh);
4097 if (fdh == NULL)
4098 data->ok = FALSE;
4099 else
4100 fdh->elf.ref_regular = 1;
4101 }
4102 else if (fdh != NULL
4103 && (fdh->elf.root.type == bfd_link_hash_defined
4104 || fdh->elf.root.type == bfd_link_hash_defweak))
4105 {
4106 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4107 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4108 if (entry_vis < descr_vis)
4109 fdh->elf.other += entry_vis - descr_vis;
4110 else if (entry_vis > descr_vis)
4111 eh->elf.other += descr_vis - entry_vis;
4112
4113 if (eh->elf.root.type == bfd_link_hash_undefined)
4114 {
4115 eh->elf.root.type = bfd_link_hash_undefweak;
4116 eh->was_undefined = 1;
4117 htab->twiddled_syms = 1;
4118 }
4119 }
4120
4121 return TRUE;
4122 }
4123
4124 static bfd_boolean
4125 ppc64_elf_check_directives (bfd *abfd ATTRIBUTE_UNUSED,
4126 struct bfd_link_info *info)
4127 {
4128 struct ppc_link_hash_table *htab;
4129 struct add_symbol_adjust_data data;
4130
4131 htab = ppc_hash_table (info);
4132 if (!is_ppc64_elf_target (htab->elf.root.creator))
4133 return TRUE;
4134
4135 data.info = info;
4136 data.ok = TRUE;
4137 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4138
4139 /* We need to fix the undefs list for any syms we have twiddled to
4140 undef_weak. */
4141 if (htab->twiddled_syms)
4142 {
4143 bfd_link_repair_undef_list (&htab->elf.root);
4144 htab->twiddled_syms = 0;
4145 }
4146 return data.ok;
4147 }
4148
4149 static bfd_boolean
4150 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4151 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4152 {
4153 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4154 char *local_got_tls_masks;
4155
4156 if (local_got_ents == NULL)
4157 {
4158 bfd_size_type size = symtab_hdr->sh_info;
4159
4160 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4161 local_got_ents = bfd_zalloc (abfd, size);
4162 if (local_got_ents == NULL)
4163 return FALSE;
4164 elf_local_got_ents (abfd) = local_got_ents;
4165 }
4166
4167 if ((tls_type & TLS_EXPLICIT) == 0)
4168 {
4169 struct got_entry *ent;
4170
4171 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4172 if (ent->addend == r_addend
4173 && ent->owner == abfd
4174 && ent->tls_type == tls_type)
4175 break;
4176 if (ent == NULL)
4177 {
4178 bfd_size_type amt = sizeof (*ent);
4179 ent = bfd_alloc (abfd, amt);
4180 if (ent == NULL)
4181 return FALSE;
4182 ent->next = local_got_ents[r_symndx];
4183 ent->addend = r_addend;
4184 ent->owner = abfd;
4185 ent->tls_type = tls_type;
4186 ent->got.refcount = 0;
4187 local_got_ents[r_symndx] = ent;
4188 }
4189 ent->got.refcount += 1;
4190 }
4191
4192 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4193 local_got_tls_masks[r_symndx] |= tls_type;
4194 return TRUE;
4195 }
4196
4197 static bfd_boolean
4198 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4199 {
4200 struct plt_entry *ent;
4201
4202 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4203 if (ent->addend == addend)
4204 break;
4205 if (ent == NULL)
4206 {
4207 bfd_size_type amt = sizeof (*ent);
4208 ent = bfd_alloc (abfd, amt);
4209 if (ent == NULL)
4210 return FALSE;
4211 ent->next = eh->elf.plt.plist;
4212 ent->addend = addend;
4213 ent->plt.refcount = 0;
4214 eh->elf.plt.plist = ent;
4215 }
4216 ent->plt.refcount += 1;
4217 eh->elf.needs_plt = 1;
4218 if (eh->elf.root.root.string[0] == '.'
4219 && eh->elf.root.root.string[1] != '\0')
4220 eh->is_func = 1;
4221 return TRUE;
4222 }
4223
4224 /* Look through the relocs for a section during the first phase, and
4225 calculate needed space in the global offset table, procedure
4226 linkage table, and dynamic reloc sections. */
4227
4228 static bfd_boolean
4229 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4230 asection *sec, const Elf_Internal_Rela *relocs)
4231 {
4232 struct ppc_link_hash_table *htab;
4233 Elf_Internal_Shdr *symtab_hdr;
4234 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4235 const Elf_Internal_Rela *rel;
4236 const Elf_Internal_Rela *rel_end;
4237 asection *sreloc;
4238 asection **opd_sym_map;
4239
4240 if (info->relocatable)
4241 return TRUE;
4242
4243 /* Don't do anything special with non-loaded, non-alloced sections.
4244 In particular, any relocs in such sections should not affect GOT
4245 and PLT reference counting (ie. we don't allow them to create GOT
4246 or PLT entries), there's no possibility or desire to optimize TLS
4247 relocs, and there's not much point in propagating relocs to shared
4248 libs that the dynamic linker won't relocate. */
4249 if ((sec->flags & SEC_ALLOC) == 0)
4250 return TRUE;
4251
4252 htab = ppc_hash_table (info);
4253 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4254
4255 sym_hashes = elf_sym_hashes (abfd);
4256 sym_hashes_end = (sym_hashes
4257 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4258 - symtab_hdr->sh_info);
4259
4260 sreloc = NULL;
4261 opd_sym_map = NULL;
4262 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4263 {
4264 /* Garbage collection needs some extra help with .opd sections.
4265 We don't want to necessarily keep everything referenced by
4266 relocs in .opd, as that would keep all functions. Instead,
4267 if we reference an .opd symbol (a function descriptor), we
4268 want to keep the function code symbol's section. This is
4269 easy for global symbols, but for local syms we need to keep
4270 information about the associated function section. Later, if
4271 edit_opd deletes entries, we'll use this array to adjust
4272 local syms in .opd. */
4273 union opd_info {
4274 asection *func_section;
4275 long entry_adjust;
4276 };
4277 bfd_size_type amt;
4278
4279 amt = sec->size * sizeof (union opd_info) / 8;
4280 opd_sym_map = bfd_zalloc (abfd, amt);
4281 if (opd_sym_map == NULL)
4282 return FALSE;
4283 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4284 }
4285
4286 if (htab->sfpr == NULL
4287 && !create_linkage_sections (htab->elf.dynobj, info))
4288 return FALSE;
4289
4290 rel_end = relocs + sec->reloc_count;
4291 for (rel = relocs; rel < rel_end; rel++)
4292 {
4293 unsigned long r_symndx;
4294 struct elf_link_hash_entry *h;
4295 enum elf_ppc64_reloc_type r_type;
4296 int tls_type = 0;
4297
4298 r_symndx = ELF64_R_SYM (rel->r_info);
4299 if (r_symndx < symtab_hdr->sh_info)
4300 h = NULL;
4301 else
4302 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4303
4304 r_type = ELF64_R_TYPE (rel->r_info);
4305 switch (r_type)
4306 {
4307 case R_PPC64_GOT_TLSLD16:
4308 case R_PPC64_GOT_TLSLD16_LO:
4309 case R_PPC64_GOT_TLSLD16_HI:
4310 case R_PPC64_GOT_TLSLD16_HA:
4311 ppc64_tlsld_got (abfd)->refcount += 1;
4312 tls_type = TLS_TLS | TLS_LD;
4313 goto dogottls;
4314
4315 case R_PPC64_GOT_TLSGD16:
4316 case R_PPC64_GOT_TLSGD16_LO:
4317 case R_PPC64_GOT_TLSGD16_HI:
4318 case R_PPC64_GOT_TLSGD16_HA:
4319 tls_type = TLS_TLS | TLS_GD;
4320 goto dogottls;
4321
4322 case R_PPC64_GOT_TPREL16_DS:
4323 case R_PPC64_GOT_TPREL16_LO_DS:
4324 case R_PPC64_GOT_TPREL16_HI:
4325 case R_PPC64_GOT_TPREL16_HA:
4326 if (info->shared)
4327 info->flags |= DF_STATIC_TLS;
4328 tls_type = TLS_TLS | TLS_TPREL;
4329 goto dogottls;
4330
4331 case R_PPC64_GOT_DTPREL16_DS:
4332 case R_PPC64_GOT_DTPREL16_LO_DS:
4333 case R_PPC64_GOT_DTPREL16_HI:
4334 case R_PPC64_GOT_DTPREL16_HA:
4335 tls_type = TLS_TLS | TLS_DTPREL;
4336 dogottls:
4337 sec->has_tls_reloc = 1;
4338 /* Fall thru */
4339
4340 case R_PPC64_GOT16:
4341 case R_PPC64_GOT16_DS:
4342 case R_PPC64_GOT16_HA:
4343 case R_PPC64_GOT16_HI:
4344 case R_PPC64_GOT16_LO:
4345 case R_PPC64_GOT16_LO_DS:
4346 /* This symbol requires a global offset table entry. */
4347 sec->has_toc_reloc = 1;
4348 if (ppc64_elf_tdata (abfd)->got == NULL
4349 && !create_got_section (abfd, info))
4350 return FALSE;
4351
4352 if (h != NULL)
4353 {
4354 struct ppc_link_hash_entry *eh;
4355 struct got_entry *ent;
4356
4357 eh = (struct ppc_link_hash_entry *) h;
4358 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4359 if (ent->addend == rel->r_addend
4360 && ent->owner == abfd
4361 && ent->tls_type == tls_type)
4362 break;
4363 if (ent == NULL)
4364 {
4365 bfd_size_type amt = sizeof (*ent);
4366 ent = bfd_alloc (abfd, amt);
4367 if (ent == NULL)
4368 return FALSE;
4369 ent->next = eh->elf.got.glist;
4370 ent->addend = rel->r_addend;
4371 ent->owner = abfd;
4372 ent->tls_type = tls_type;
4373 ent->got.refcount = 0;
4374 eh->elf.got.glist = ent;
4375 }
4376 ent->got.refcount += 1;
4377 eh->tls_mask |= tls_type;
4378 }
4379 else
4380 /* This is a global offset table entry for a local symbol. */
4381 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4382 rel->r_addend, tls_type))
4383 return FALSE;
4384 break;
4385
4386 case R_PPC64_PLT16_HA:
4387 case R_PPC64_PLT16_HI:
4388 case R_PPC64_PLT16_LO:
4389 case R_PPC64_PLT32:
4390 case R_PPC64_PLT64:
4391 /* This symbol requires a procedure linkage table entry. We
4392 actually build the entry in adjust_dynamic_symbol,
4393 because this might be a case of linking PIC code without
4394 linking in any dynamic objects, in which case we don't
4395 need to generate a procedure linkage table after all. */
4396 if (h == NULL)
4397 {
4398 /* It does not make sense to have a procedure linkage
4399 table entry for a local symbol. */
4400 bfd_set_error (bfd_error_bad_value);
4401 return FALSE;
4402 }
4403 else
4404 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4405 rel->r_addend))
4406 return FALSE;
4407 break;
4408
4409 /* The following relocations don't need to propagate the
4410 relocation if linking a shared object since they are
4411 section relative. */
4412 case R_PPC64_SECTOFF:
4413 case R_PPC64_SECTOFF_LO:
4414 case R_PPC64_SECTOFF_HI:
4415 case R_PPC64_SECTOFF_HA:
4416 case R_PPC64_SECTOFF_DS:
4417 case R_PPC64_SECTOFF_LO_DS:
4418 case R_PPC64_DTPREL16:
4419 case R_PPC64_DTPREL16_LO:
4420 case R_PPC64_DTPREL16_HI:
4421 case R_PPC64_DTPREL16_HA:
4422 case R_PPC64_DTPREL16_DS:
4423 case R_PPC64_DTPREL16_LO_DS:
4424 case R_PPC64_DTPREL16_HIGHER:
4425 case R_PPC64_DTPREL16_HIGHERA:
4426 case R_PPC64_DTPREL16_HIGHEST:
4427 case R_PPC64_DTPREL16_HIGHESTA:
4428 break;
4429
4430 /* Nor do these. */
4431 case R_PPC64_TOC16:
4432 case R_PPC64_TOC16_LO:
4433 case R_PPC64_TOC16_HI:
4434 case R_PPC64_TOC16_HA:
4435 case R_PPC64_TOC16_DS:
4436 case R_PPC64_TOC16_LO_DS:
4437 sec->has_toc_reloc = 1;
4438 break;
4439
4440 /* This relocation describes the C++ object vtable hierarchy.
4441 Reconstruct it for later use during GC. */
4442 case R_PPC64_GNU_VTINHERIT:
4443 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4444 return FALSE;
4445 break;
4446
4447 /* This relocation describes which C++ vtable entries are actually
4448 used. Record for later use during GC. */
4449 case R_PPC64_GNU_VTENTRY:
4450 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4451 return FALSE;
4452 break;
4453
4454 case R_PPC64_REL14:
4455 case R_PPC64_REL14_BRTAKEN:
4456 case R_PPC64_REL14_BRNTAKEN:
4457 htab->has_14bit_branch = 1;
4458 /* Fall through. */
4459
4460 case R_PPC64_REL24:
4461 if (h != NULL)
4462 {
4463 /* We may need a .plt entry if the function this reloc
4464 refers to is in a shared lib. */
4465 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4466 rel->r_addend))
4467 return FALSE;
4468 if (h == &htab->tls_get_addr->elf
4469 || h == &htab->tls_get_addr_fd->elf)
4470 sec->has_tls_reloc = 1;
4471 else if (htab->tls_get_addr == NULL
4472 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4473 && (h->root.root.string[15] == 0
4474 || h->root.root.string[15] == '@'))
4475 {
4476 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4477 sec->has_tls_reloc = 1;
4478 }
4479 else if (htab->tls_get_addr_fd == NULL
4480 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4481 && (h->root.root.string[14] == 0
4482 || h->root.root.string[14] == '@'))
4483 {
4484 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4485 sec->has_tls_reloc = 1;
4486 }
4487 }
4488 break;
4489
4490 case R_PPC64_TPREL64:
4491 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4492 if (info->shared)
4493 info->flags |= DF_STATIC_TLS;
4494 goto dotlstoc;
4495
4496 case R_PPC64_DTPMOD64:
4497 if (rel + 1 < rel_end
4498 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4499 && rel[1].r_offset == rel->r_offset + 8)
4500 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4501 else
4502 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4503 goto dotlstoc;
4504
4505 case R_PPC64_DTPREL64:
4506 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4507 if (rel != relocs
4508 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4509 && rel[-1].r_offset == rel->r_offset - 8)
4510 /* This is the second reloc of a dtpmod, dtprel pair.
4511 Don't mark with TLS_DTPREL. */
4512 goto dodyn;
4513
4514 dotlstoc:
4515 sec->has_tls_reloc = 1;
4516 if (h != NULL)
4517 {
4518 struct ppc_link_hash_entry *eh;
4519 eh = (struct ppc_link_hash_entry *) h;
4520 eh->tls_mask |= tls_type;
4521 }
4522 else
4523 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4524 rel->r_addend, tls_type))
4525 return FALSE;
4526
4527 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4528 {
4529 /* One extra to simplify get_tls_mask. */
4530 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4531 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4532 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4533 return FALSE;
4534 }
4535 BFD_ASSERT (rel->r_offset % 8 == 0);
4536 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4537
4538 /* Mark the second slot of a GD or LD entry.
4539 -1 to indicate GD and -2 to indicate LD. */
4540 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4541 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4542 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4543 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4544 goto dodyn;
4545
4546 case R_PPC64_TPREL16:
4547 case R_PPC64_TPREL16_LO:
4548 case R_PPC64_TPREL16_HI:
4549 case R_PPC64_TPREL16_HA:
4550 case R_PPC64_TPREL16_DS:
4551 case R_PPC64_TPREL16_LO_DS:
4552 case R_PPC64_TPREL16_HIGHER:
4553 case R_PPC64_TPREL16_HIGHERA:
4554 case R_PPC64_TPREL16_HIGHEST:
4555 case R_PPC64_TPREL16_HIGHESTA:
4556 if (info->shared)
4557 {
4558 info->flags |= DF_STATIC_TLS;
4559 goto dodyn;
4560 }
4561 break;
4562
4563 case R_PPC64_ADDR64:
4564 if (opd_sym_map != NULL
4565 && rel + 1 < rel_end
4566 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4567 {
4568 if (h != NULL)
4569 {
4570 if (h->root.root.string[0] == '.'
4571 && h->root.root.string[1] != 0
4572 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4573 ;
4574 else
4575 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4576 }
4577 else
4578 {
4579 asection *s;
4580
4581 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4582 r_symndx);
4583 if (s == NULL)
4584 return FALSE;
4585 else if (s != sec)
4586 opd_sym_map[rel->r_offset / 8] = s;
4587 }
4588 }
4589 /* Fall through. */
4590
4591 case R_PPC64_REL30:
4592 case R_PPC64_REL32:
4593 case R_PPC64_REL64:
4594 case R_PPC64_ADDR14:
4595 case R_PPC64_ADDR14_BRNTAKEN:
4596 case R_PPC64_ADDR14_BRTAKEN:
4597 case R_PPC64_ADDR16:
4598 case R_PPC64_ADDR16_DS:
4599 case R_PPC64_ADDR16_HA:
4600 case R_PPC64_ADDR16_HI:
4601 case R_PPC64_ADDR16_HIGHER:
4602 case R_PPC64_ADDR16_HIGHERA:
4603 case R_PPC64_ADDR16_HIGHEST:
4604 case R_PPC64_ADDR16_HIGHESTA:
4605 case R_PPC64_ADDR16_LO:
4606 case R_PPC64_ADDR16_LO_DS:
4607 case R_PPC64_ADDR24:
4608 case R_PPC64_ADDR32:
4609 case R_PPC64_UADDR16:
4610 case R_PPC64_UADDR32:
4611 case R_PPC64_UADDR64:
4612 case R_PPC64_TOC:
4613 if (h != NULL && !info->shared)
4614 /* We may need a copy reloc. */
4615 h->non_got_ref = 1;
4616
4617 /* Don't propagate .opd relocs. */
4618 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4619 break;
4620
4621 /* If we are creating a shared library, and this is a reloc
4622 against a global symbol, or a non PC relative reloc
4623 against a local symbol, then we need to copy the reloc
4624 into the shared library. However, if we are linking with
4625 -Bsymbolic, we do not need to copy a reloc against a
4626 global symbol which is defined in an object we are
4627 including in the link (i.e., DEF_REGULAR is set). At
4628 this point we have not seen all the input files, so it is
4629 possible that DEF_REGULAR is not set now but will be set
4630 later (it is never cleared). In case of a weak definition,
4631 DEF_REGULAR may be cleared later by a strong definition in
4632 a shared library. We account for that possibility below by
4633 storing information in the dyn_relocs field of the hash
4634 table entry. A similar situation occurs when creating
4635 shared libraries and symbol visibility changes render the
4636 symbol local.
4637
4638 If on the other hand, we are creating an executable, we
4639 may need to keep relocations for symbols satisfied by a
4640 dynamic library if we manage to avoid copy relocs for the
4641 symbol. */
4642 dodyn:
4643 if ((info->shared
4644 && (MUST_BE_DYN_RELOC (r_type)
4645 || (h != NULL
4646 && (! info->symbolic
4647 || h->root.type == bfd_link_hash_defweak
4648 || !h->def_regular))))
4649 || (ELIMINATE_COPY_RELOCS
4650 && !info->shared
4651 && h != NULL
4652 && (h->root.type == bfd_link_hash_defweak
4653 || !h->def_regular)))
4654 {
4655 struct ppc_dyn_relocs *p;
4656 struct ppc_dyn_relocs **head;
4657
4658 /* We must copy these reloc types into the output file.
4659 Create a reloc section in dynobj and make room for
4660 this reloc. */
4661 if (sreloc == NULL)
4662 {
4663 const char *name;
4664 bfd *dynobj;
4665
4666 name = (bfd_elf_string_from_elf_section
4667 (abfd,
4668 elf_elfheader (abfd)->e_shstrndx,
4669 elf_section_data (sec)->rel_hdr.sh_name));
4670 if (name == NULL)
4671 return FALSE;
4672
4673 if (strncmp (name, ".rela", 5) != 0
4674 || strcmp (bfd_get_section_name (abfd, sec),
4675 name + 5) != 0)
4676 {
4677 (*_bfd_error_handler)
4678 (_("%B: bad relocation section name `%s\'"),
4679 abfd, name);
4680 bfd_set_error (bfd_error_bad_value);
4681 }
4682
4683 dynobj = htab->elf.dynobj;
4684 sreloc = bfd_get_section_by_name (dynobj, name);
4685 if (sreloc == NULL)
4686 {
4687 flagword flags;
4688
4689 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4690 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4691 | SEC_ALLOC | SEC_LOAD);
4692 sreloc = bfd_make_section_with_flags (dynobj,
4693 name,
4694 flags);
4695 if (sreloc == NULL
4696 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4697 return FALSE;
4698 }
4699 elf_section_data (sec)->sreloc = sreloc;
4700 }
4701
4702 /* If this is a global symbol, we count the number of
4703 relocations we need for this symbol. */
4704 if (h != NULL)
4705 {
4706 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4707 }
4708 else
4709 {
4710 /* Track dynamic relocs needed for local syms too.
4711 We really need local syms available to do this
4712 easily. Oh well. */
4713
4714 asection *s;
4715 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4716 sec, r_symndx);
4717 if (s == NULL)
4718 return FALSE;
4719
4720 head = ((struct ppc_dyn_relocs **)
4721 &elf_section_data (s)->local_dynrel);
4722 }
4723
4724 p = *head;
4725 if (p == NULL || p->sec != sec)
4726 {
4727 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4728 if (p == NULL)
4729 return FALSE;
4730 p->next = *head;
4731 *head = p;
4732 p->sec = sec;
4733 p->count = 0;
4734 p->pc_count = 0;
4735 }
4736
4737 p->count += 1;
4738 if (!MUST_BE_DYN_RELOC (r_type))
4739 p->pc_count += 1;
4740 }
4741 break;
4742
4743 default:
4744 break;
4745 }
4746 }
4747
4748 return TRUE;
4749 }
4750
4751 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4752 of the code entry point, and its section. */
4753
4754 static bfd_vma
4755 opd_entry_value (asection *opd_sec,
4756 bfd_vma offset,
4757 asection **code_sec,
4758 bfd_vma *code_off)
4759 {
4760 bfd *opd_bfd = opd_sec->owner;
4761 Elf_Internal_Rela *relocs;
4762 Elf_Internal_Rela *lo, *hi, *look;
4763 bfd_vma val;
4764
4765 /* No relocs implies we are linking a --just-symbols object. */
4766 if (opd_sec->reloc_count == 0)
4767 {
4768 bfd_vma val;
4769
4770 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4771 return (bfd_vma) -1;
4772
4773 if (code_sec != NULL)
4774 {
4775 asection *sec, *likely = NULL;
4776 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4777 if (sec->vma <= val
4778 && (sec->flags & SEC_LOAD) != 0
4779 && (sec->flags & SEC_ALLOC) != 0)
4780 likely = sec;
4781 if (likely != NULL)
4782 {
4783 *code_sec = likely;
4784 if (code_off != NULL)
4785 *code_off = val - likely->vma;
4786 }
4787 }
4788 return val;
4789 }
4790
4791 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4792 if (relocs == NULL)
4793 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4794
4795 /* Go find the opd reloc at the sym address. */
4796 lo = relocs;
4797 BFD_ASSERT (lo != NULL);
4798 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4799 val = (bfd_vma) -1;
4800 while (lo < hi)
4801 {
4802 look = lo + (hi - lo) / 2;
4803 if (look->r_offset < offset)
4804 lo = look + 1;
4805 else if (look->r_offset > offset)
4806 hi = look;
4807 else
4808 {
4809 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4810 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4811 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4812 {
4813 unsigned long symndx = ELF64_R_SYM (look->r_info);
4814 asection *sec;
4815
4816 if (symndx < symtab_hdr->sh_info)
4817 {
4818 Elf_Internal_Sym *sym;
4819
4820 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4821 if (sym == NULL)
4822 {
4823 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4824 symtab_hdr->sh_info,
4825 0, NULL, NULL, NULL);
4826 if (sym == NULL)
4827 break;
4828 symtab_hdr->contents = (bfd_byte *) sym;
4829 }
4830
4831 sym += symndx;
4832 val = sym->st_value;
4833 sec = NULL;
4834 if ((sym->st_shndx != SHN_UNDEF
4835 && sym->st_shndx < SHN_LORESERVE)
4836 || sym->st_shndx > SHN_HIRESERVE)
4837 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4838 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4839 }
4840 else
4841 {
4842 struct elf_link_hash_entry **sym_hashes;
4843 struct elf_link_hash_entry *rh;
4844
4845 sym_hashes = elf_sym_hashes (opd_bfd);
4846 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4847 while (rh->root.type == bfd_link_hash_indirect
4848 || rh->root.type == bfd_link_hash_warning)
4849 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4850 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4851 || rh->root.type == bfd_link_hash_defweak);
4852 val = rh->root.u.def.value;
4853 sec = rh->root.u.def.section;
4854 }
4855 val += look->r_addend;
4856 if (code_off != NULL)
4857 *code_off = val;
4858 if (code_sec != NULL)
4859 *code_sec = sec;
4860 if (sec != NULL && sec->output_section != NULL)
4861 val += sec->output_section->vma + sec->output_offset;
4862 }
4863 break;
4864 }
4865 }
4866
4867 return val;
4868 }
4869
4870 /* Return the section that should be marked against GC for a given
4871 relocation. */
4872
4873 static asection *
4874 ppc64_elf_gc_mark_hook (asection *sec,
4875 struct bfd_link_info *info,
4876 Elf_Internal_Rela *rel,
4877 struct elf_link_hash_entry *h,
4878 Elf_Internal_Sym *sym)
4879 {
4880 asection *rsec;
4881
4882 /* First mark all our entry sym sections. */
4883 if (info->gc_sym_list != NULL)
4884 {
4885 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4886 struct bfd_sym_chain *sym = info->gc_sym_list;
4887
4888 info->gc_sym_list = NULL;
4889 do
4890 {
4891 struct ppc_link_hash_entry *eh;
4892
4893 eh = (struct ppc_link_hash_entry *)
4894 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4895 if (eh == NULL)
4896 continue;
4897 if (eh->elf.root.type != bfd_link_hash_defined
4898 && eh->elf.root.type != bfd_link_hash_defweak)
4899 continue;
4900
4901 if (eh->is_func_descriptor
4902 && (eh->oh->elf.root.type == bfd_link_hash_defined
4903 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4904 rsec = eh->oh->elf.root.u.def.section;
4905 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4906 && opd_entry_value (eh->elf.root.u.def.section,
4907 eh->elf.root.u.def.value,
4908 &rsec, NULL) != (bfd_vma) -1)
4909 ;
4910 else
4911 continue;
4912
4913 if (!rsec->gc_mark)
4914 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4915
4916 rsec = eh->elf.root.u.def.section;
4917 if (!rsec->gc_mark)
4918 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4919
4920 sym = sym->next;
4921 }
4922 while (sym != NULL);
4923 }
4924
4925 /* Syms return NULL if we're marking .opd, so we avoid marking all
4926 function sections, as all functions are referenced in .opd. */
4927 rsec = NULL;
4928 if (get_opd_info (sec) != NULL)
4929 return rsec;
4930
4931 if (h != NULL)
4932 {
4933 enum elf_ppc64_reloc_type r_type;
4934 struct ppc_link_hash_entry *eh;
4935
4936 r_type = ELF64_R_TYPE (rel->r_info);
4937 switch (r_type)
4938 {
4939 case R_PPC64_GNU_VTINHERIT:
4940 case R_PPC64_GNU_VTENTRY:
4941 break;
4942
4943 default:
4944 switch (h->root.type)
4945 {
4946 case bfd_link_hash_defined:
4947 case bfd_link_hash_defweak:
4948 eh = (struct ppc_link_hash_entry *) h;
4949 if (eh->oh != NULL
4950 && eh->oh->is_func_descriptor
4951 && (eh->oh->elf.root.type == bfd_link_hash_defined
4952 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4953 eh = eh->oh;
4954
4955 /* Function descriptor syms cause the associated
4956 function code sym section to be marked. */
4957 if (eh->is_func_descriptor
4958 && (eh->oh->elf.root.type == bfd_link_hash_defined
4959 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4960 {
4961 /* They also mark their opd section. */
4962 if (!eh->elf.root.u.def.section->gc_mark)
4963 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4964 ppc64_elf_gc_mark_hook);
4965
4966 rsec = eh->oh->elf.root.u.def.section;
4967 }
4968 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4969 && opd_entry_value (eh->elf.root.u.def.section,
4970 eh->elf.root.u.def.value,
4971 &rsec, NULL) != (bfd_vma) -1)
4972 {
4973 if (!eh->elf.root.u.def.section->gc_mark)
4974 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4975 ppc64_elf_gc_mark_hook);
4976 }
4977 else
4978 rsec = h->root.u.def.section;
4979 break;
4980
4981 case bfd_link_hash_common:
4982 rsec = h->root.u.c.p->section;
4983 break;
4984
4985 default:
4986 break;
4987 }
4988 }
4989 }
4990 else
4991 {
4992 asection **opd_sym_section;
4993
4994 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4995 opd_sym_section = get_opd_info (rsec);
4996 if (opd_sym_section != NULL)
4997 {
4998 if (!rsec->gc_mark)
4999 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5000
5001 rsec = opd_sym_section[sym->st_value / 8];
5002 }
5003 }
5004
5005 return rsec;
5006 }
5007
5008 /* Update the .got, .plt. and dynamic reloc reference counts for the
5009 section being removed. */
5010
5011 static bfd_boolean
5012 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5013 asection *sec, const Elf_Internal_Rela *relocs)
5014 {
5015 struct ppc_link_hash_table *htab;
5016 Elf_Internal_Shdr *symtab_hdr;
5017 struct elf_link_hash_entry **sym_hashes;
5018 struct got_entry **local_got_ents;
5019 const Elf_Internal_Rela *rel, *relend;
5020
5021 if ((sec->flags & SEC_ALLOC) == 0)
5022 return TRUE;
5023
5024 elf_section_data (sec)->local_dynrel = NULL;
5025
5026 htab = ppc_hash_table (info);
5027 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5028 sym_hashes = elf_sym_hashes (abfd);
5029 local_got_ents = elf_local_got_ents (abfd);
5030
5031 relend = relocs + sec->reloc_count;
5032 for (rel = relocs; rel < relend; rel++)
5033 {
5034 unsigned long r_symndx;
5035 enum elf_ppc64_reloc_type r_type;
5036 struct elf_link_hash_entry *h = NULL;
5037 char tls_type = 0;
5038
5039 r_symndx = ELF64_R_SYM (rel->r_info);
5040 r_type = ELF64_R_TYPE (rel->r_info);
5041 if (r_symndx >= symtab_hdr->sh_info)
5042 {
5043 struct ppc_link_hash_entry *eh;
5044 struct ppc_dyn_relocs **pp;
5045 struct ppc_dyn_relocs *p;
5046
5047 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5048 while (h->root.type == bfd_link_hash_indirect
5049 || h->root.type == bfd_link_hash_warning)
5050 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5051 eh = (struct ppc_link_hash_entry *) h;
5052
5053 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5054 if (p->sec == sec)
5055 {
5056 /* Everything must go for SEC. */
5057 *pp = p->next;
5058 break;
5059 }
5060 }
5061
5062 switch (r_type)
5063 {
5064 case R_PPC64_GOT_TLSLD16:
5065 case R_PPC64_GOT_TLSLD16_LO:
5066 case R_PPC64_GOT_TLSLD16_HI:
5067 case R_PPC64_GOT_TLSLD16_HA:
5068 ppc64_tlsld_got (abfd)->refcount -= 1;
5069 tls_type = TLS_TLS | TLS_LD;
5070 goto dogot;
5071
5072 case R_PPC64_GOT_TLSGD16:
5073 case R_PPC64_GOT_TLSGD16_LO:
5074 case R_PPC64_GOT_TLSGD16_HI:
5075 case R_PPC64_GOT_TLSGD16_HA:
5076 tls_type = TLS_TLS | TLS_GD;
5077 goto dogot;
5078
5079 case R_PPC64_GOT_TPREL16_DS:
5080 case R_PPC64_GOT_TPREL16_LO_DS:
5081 case R_PPC64_GOT_TPREL16_HI:
5082 case R_PPC64_GOT_TPREL16_HA:
5083 tls_type = TLS_TLS | TLS_TPREL;
5084 goto dogot;
5085
5086 case R_PPC64_GOT_DTPREL16_DS:
5087 case R_PPC64_GOT_DTPREL16_LO_DS:
5088 case R_PPC64_GOT_DTPREL16_HI:
5089 case R_PPC64_GOT_DTPREL16_HA:
5090 tls_type = TLS_TLS | TLS_DTPREL;
5091 goto dogot;
5092
5093 case R_PPC64_GOT16:
5094 case R_PPC64_GOT16_DS:
5095 case R_PPC64_GOT16_HA:
5096 case R_PPC64_GOT16_HI:
5097 case R_PPC64_GOT16_LO:
5098 case R_PPC64_GOT16_LO_DS:
5099 dogot:
5100 {
5101 struct got_entry *ent;
5102
5103 if (h != NULL)
5104 ent = h->got.glist;
5105 else
5106 ent = local_got_ents[r_symndx];
5107
5108 for (; ent != NULL; ent = ent->next)
5109 if (ent->addend == rel->r_addend
5110 && ent->owner == abfd
5111 && ent->tls_type == tls_type)
5112 break;
5113 if (ent == NULL)
5114 abort ();
5115 if (ent->got.refcount > 0)
5116 ent->got.refcount -= 1;
5117 }
5118 break;
5119
5120 case R_PPC64_PLT16_HA:
5121 case R_PPC64_PLT16_HI:
5122 case R_PPC64_PLT16_LO:
5123 case R_PPC64_PLT32:
5124 case R_PPC64_PLT64:
5125 case R_PPC64_REL14:
5126 case R_PPC64_REL14_BRNTAKEN:
5127 case R_PPC64_REL14_BRTAKEN:
5128 case R_PPC64_REL24:
5129 if (h != NULL)
5130 {
5131 struct plt_entry *ent;
5132
5133 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5134 if (ent->addend == rel->r_addend)
5135 break;
5136 if (ent == NULL)
5137 abort ();
5138 if (ent->plt.refcount > 0)
5139 ent->plt.refcount -= 1;
5140 }
5141 break;
5142
5143 default:
5144 break;
5145 }
5146 }
5147 return TRUE;
5148 }
5149
5150 /* The maximum size of .sfpr. */
5151 #define SFPR_MAX (218*4)
5152
5153 struct sfpr_def_parms
5154 {
5155 const char name[12];
5156 unsigned char lo, hi;
5157 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5158 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5159 };
5160
5161 /* Auto-generate _save*, _rest* functions in .sfpr. */
5162
5163 static unsigned int
5164 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5165 {
5166 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5167 unsigned int i;
5168 size_t len = strlen (parm->name);
5169 bfd_boolean writing = FALSE;
5170 char sym[16];
5171
5172 memcpy (sym, parm->name, len);
5173 sym[len + 2] = 0;
5174
5175 for (i = parm->lo; i <= parm->hi; i++)
5176 {
5177 struct elf_link_hash_entry *h;
5178
5179 sym[len + 0] = i / 10 + '0';
5180 sym[len + 1] = i % 10 + '0';
5181 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5182 if (h != NULL
5183 && !h->def_regular)
5184 {
5185 h->root.type = bfd_link_hash_defined;
5186 h->root.u.def.section = htab->sfpr;
5187 h->root.u.def.value = htab->sfpr->size;
5188 h->type = STT_FUNC;
5189 h->def_regular = 1;
5190 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5191 writing = TRUE;
5192 if (htab->sfpr->contents == NULL)
5193 {
5194 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5195 if (htab->sfpr->contents == NULL)
5196 return FALSE;
5197 }
5198 }
5199 if (writing)
5200 {
5201 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5202 if (i != parm->hi)
5203 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5204 else
5205 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5206 htab->sfpr->size = p - htab->sfpr->contents;
5207 }
5208 }
5209
5210 return TRUE;
5211 }
5212
5213 static bfd_byte *
5214 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5215 {
5216 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5217 return p + 4;
5218 }
5219
5220 static bfd_byte *
5221 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5222 {
5223 p = savegpr0 (abfd, p, r);
5224 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5225 p = p + 4;
5226 bfd_put_32 (abfd, BLR, p);
5227 return p + 4;
5228 }
5229
5230 static bfd_byte *
5231 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5232 {
5233 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5234 return p + 4;
5235 }
5236
5237 static bfd_byte *
5238 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5239 {
5240 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5241 p = p + 4;
5242 p = restgpr0 (abfd, p, r);
5243 bfd_put_32 (abfd, MTLR_R0, p);
5244 p = p + 4;
5245 if (r == 29)
5246 {
5247 p = restgpr0 (abfd, p, 30);
5248 p = restgpr0 (abfd, p, 31);
5249 }
5250 bfd_put_32 (abfd, BLR, p);
5251 return p + 4;
5252 }
5253
5254 static bfd_byte *
5255 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5256 {
5257 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5258 return p + 4;
5259 }
5260
5261 static bfd_byte *
5262 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5263 {
5264 p = savegpr1 (abfd, p, r);
5265 bfd_put_32 (abfd, BLR, p);
5266 return p + 4;
5267 }
5268
5269 static bfd_byte *
5270 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5271 {
5272 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5273 return p + 4;
5274 }
5275
5276 static bfd_byte *
5277 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5278 {
5279 p = restgpr1 (abfd, p, r);
5280 bfd_put_32 (abfd, BLR, p);
5281 return p + 4;
5282 }
5283
5284 static bfd_byte *
5285 savefpr (bfd *abfd, bfd_byte *p, int r)
5286 {
5287 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5288 return p + 4;
5289 }
5290
5291 static bfd_byte *
5292 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5293 {
5294 p = savefpr (abfd, p, r);
5295 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5296 p = p + 4;
5297 bfd_put_32 (abfd, BLR, p);
5298 return p + 4;
5299 }
5300
5301 static bfd_byte *
5302 restfpr (bfd *abfd, bfd_byte *p, int r)
5303 {
5304 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5305 return p + 4;
5306 }
5307
5308 static bfd_byte *
5309 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5310 {
5311 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5312 p = p + 4;
5313 p = restfpr (abfd, p, r);
5314 bfd_put_32 (abfd, MTLR_R0, p);
5315 p = p + 4;
5316 if (r == 29)
5317 {
5318 p = restfpr (abfd, p, 30);
5319 p = restfpr (abfd, p, 31);
5320 }
5321 bfd_put_32 (abfd, BLR, p);
5322 return p + 4;
5323 }
5324
5325 static bfd_byte *
5326 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5327 {
5328 p = savefpr (abfd, p, r);
5329 bfd_put_32 (abfd, BLR, p);
5330 return p + 4;
5331 }
5332
5333 static bfd_byte *
5334 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5335 {
5336 p = restfpr (abfd, p, r);
5337 bfd_put_32 (abfd, BLR, p);
5338 return p + 4;
5339 }
5340
5341 static bfd_byte *
5342 savevr (bfd *abfd, bfd_byte *p, int r)
5343 {
5344 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5345 p = p + 4;
5346 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5347 return p + 4;
5348 }
5349
5350 static bfd_byte *
5351 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5352 {
5353 p = savevr (abfd, p, r);
5354 bfd_put_32 (abfd, BLR, p);
5355 return p + 4;
5356 }
5357
5358 static bfd_byte *
5359 restvr (bfd *abfd, bfd_byte *p, int r)
5360 {
5361 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5362 p = p + 4;
5363 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5364 return p + 4;
5365 }
5366
5367 static bfd_byte *
5368 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5369 {
5370 p = restvr (abfd, p, r);
5371 bfd_put_32 (abfd, BLR, p);
5372 return p + 4;
5373 }
5374
5375 /* Called via elf_link_hash_traverse to transfer dynamic linking
5376 information on function code symbol entries to their corresponding
5377 function descriptor symbol entries. */
5378
5379 static bfd_boolean
5380 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5381 {
5382 struct bfd_link_info *info;
5383 struct ppc_link_hash_table *htab;
5384 struct plt_entry *ent;
5385 struct ppc_link_hash_entry *fh;
5386 struct ppc_link_hash_entry *fdh;
5387 bfd_boolean force_local;
5388
5389 fh = (struct ppc_link_hash_entry *) h;
5390 if (fh->elf.root.type == bfd_link_hash_indirect)
5391 return TRUE;
5392
5393 if (fh->elf.root.type == bfd_link_hash_warning)
5394 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5395
5396 info = inf;
5397 htab = ppc_hash_table (info);
5398
5399 /* Resolve undefined references to dot-symbols as the value
5400 in the function descriptor, if we have one in a regular object.
5401 This is to satisfy cases like ".quad .foo". Calls to functions
5402 in dynamic objects are handled elsewhere. */
5403 if (fh->elf.root.type == bfd_link_hash_undefweak
5404 && fh->was_undefined
5405 && (fh->oh->elf.root.type == bfd_link_hash_defined
5406 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5407 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5408 && opd_entry_value (fh->oh->elf.root.u.def.section,
5409 fh->oh->elf.root.u.def.value,
5410 &fh->elf.root.u.def.section,
5411 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5412 {
5413 fh->elf.root.type = fh->oh->elf.root.type;
5414 fh->elf.forced_local = 1;
5415 }
5416
5417 /* If this is a function code symbol, transfer dynamic linking
5418 information to the function descriptor symbol. */
5419 if (!fh->is_func)
5420 return TRUE;
5421
5422 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5423 if (ent->plt.refcount > 0)
5424 break;
5425 if (ent == NULL
5426 || fh->elf.root.root.string[0] != '.'
5427 || fh->elf.root.root.string[1] == '\0')
5428 return TRUE;
5429
5430 /* Find the corresponding function descriptor symbol. Create it
5431 as undefined if necessary. */
5432
5433 fdh = get_fdh (fh, htab);
5434 if (fdh != NULL)
5435 while (fdh->elf.root.type == bfd_link_hash_indirect
5436 || fdh->elf.root.type == bfd_link_hash_warning)
5437 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5438
5439 if (fdh == NULL
5440 && info->shared
5441 && (fh->elf.root.type == bfd_link_hash_undefined
5442 || fh->elf.root.type == bfd_link_hash_undefweak))
5443 {
5444 fdh = make_fdh (info, fh);
5445 if (fdh == NULL)
5446 return FALSE;
5447 }
5448
5449 /* Fake function descriptors are made undefweak. If the function
5450 code symbol is strong undefined, make the fake sym the same. */
5451
5452 if (fdh != NULL
5453 && fdh->fake
5454 && fdh->elf.root.type == bfd_link_hash_undefweak
5455 && fh->elf.root.type == bfd_link_hash_undefined)
5456 {
5457 fdh->elf.root.type = bfd_link_hash_undefined;
5458 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5459 }
5460
5461 if (fdh != NULL
5462 && !fdh->elf.forced_local
5463 && (info->shared
5464 || fdh->elf.def_dynamic
5465 || fdh->elf.ref_dynamic
5466 || (fdh->elf.root.type == bfd_link_hash_undefweak
5467 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5468 {
5469 if (fdh->elf.dynindx == -1)
5470 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5471 return FALSE;
5472 fdh->elf.ref_regular |= fh->elf.ref_regular;
5473 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5474 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5475 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5476 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5477 {
5478 move_plt_plist (fh, fdh);
5479 fdh->elf.needs_plt = 1;
5480 }
5481 fdh->is_func_descriptor = 1;
5482 fdh->oh = fh;
5483 fh->oh = fdh;
5484 }
5485
5486 /* Now that the info is on the function descriptor, clear the
5487 function code sym info. Any function code syms for which we
5488 don't have a definition in a regular file, we force local.
5489 This prevents a shared library from exporting syms that have
5490 been imported from another library. Function code syms that
5491 are really in the library we must leave global to prevent the
5492 linker dragging in a definition from a static library. */
5493 force_local = (!fh->elf.def_regular
5494 || fdh == NULL
5495 || !fdh->elf.def_regular
5496 || fdh->elf.forced_local);
5497 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5498
5499 return TRUE;
5500 }
5501
5502 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5503 this hook to a) provide some gcc support functions, and b) transfer
5504 dynamic linking information gathered so far on function code symbol
5505 entries, to their corresponding function descriptor symbol entries. */
5506
5507 static bfd_boolean
5508 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5509 struct bfd_link_info *info)
5510 {
5511 struct ppc_link_hash_table *htab;
5512 unsigned int i;
5513 const struct sfpr_def_parms funcs[] =
5514 {
5515 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5516 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5517 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5518 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5519 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5520 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5521 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5522 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5523 { "._savef", 14, 31, savefpr, savefpr1_tail },
5524 { "._restf", 14, 31, restfpr, restfpr1_tail },
5525 { "_savevr_", 20, 31, savevr, savevr_tail },
5526 { "_restvr_", 20, 31, restvr, restvr_tail }
5527 };
5528
5529 htab = ppc_hash_table (info);
5530 if (htab->sfpr == NULL)
5531 /* We don't have any relocs. */
5532 return TRUE;
5533
5534 /* Provide any missing _save* and _rest* functions. */
5535 htab->sfpr->size = 0;
5536 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5537 if (!sfpr_define (info, &funcs[i]))
5538 return FALSE;
5539
5540 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5541
5542 if (htab->sfpr->size == 0)
5543 htab->sfpr->flags |= SEC_EXCLUDE;
5544
5545 return TRUE;
5546 }
5547
5548 /* Adjust a symbol defined by a dynamic object and referenced by a
5549 regular object. The current definition is in some section of the
5550 dynamic object, but we're not including those sections. We have to
5551 change the definition to something the rest of the link can
5552 understand. */
5553
5554 static bfd_boolean
5555 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5556 struct elf_link_hash_entry *h)
5557 {
5558 struct ppc_link_hash_table *htab;
5559 asection *s;
5560 unsigned int power_of_two;
5561
5562 htab = ppc_hash_table (info);
5563
5564 /* Deal with function syms. */
5565 if (h->type == STT_FUNC
5566 || h->needs_plt)
5567 {
5568 /* Clear procedure linkage table information for any symbol that
5569 won't need a .plt entry. */
5570 struct plt_entry *ent;
5571 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5572 if (ent->plt.refcount > 0)
5573 break;
5574 if (ent == NULL
5575 || SYMBOL_CALLS_LOCAL (info, h)
5576 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5577 && h->root.type == bfd_link_hash_undefweak))
5578 {
5579 h->plt.plist = NULL;
5580 h->needs_plt = 0;
5581 }
5582 }
5583 else
5584 h->plt.plist = NULL;
5585
5586 /* If this is a weak symbol, and there is a real definition, the
5587 processor independent code will have arranged for us to see the
5588 real definition first, and we can just use the same value. */
5589 if (h->u.weakdef != NULL)
5590 {
5591 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5592 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5593 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5594 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5595 if (ELIMINATE_COPY_RELOCS)
5596 h->non_got_ref = h->u.weakdef->non_got_ref;
5597 return TRUE;
5598 }
5599
5600 /* If we are creating a shared library, we must presume that the
5601 only references to the symbol are via the global offset table.
5602 For such cases we need not do anything here; the relocations will
5603 be handled correctly by relocate_section. */
5604 if (info->shared)
5605 return TRUE;
5606
5607 /* If there are no references to this symbol that do not use the
5608 GOT, we don't need to generate a copy reloc. */
5609 if (!h->non_got_ref)
5610 return TRUE;
5611
5612 if (ELIMINATE_COPY_RELOCS)
5613 {
5614 struct ppc_link_hash_entry * eh;
5615 struct ppc_dyn_relocs *p;
5616
5617 eh = (struct ppc_link_hash_entry *) h;
5618 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5619 {
5620 s = p->sec->output_section;
5621 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5622 break;
5623 }
5624
5625 /* If we didn't find any dynamic relocs in read-only sections, then
5626 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5627 if (p == NULL)
5628 {
5629 h->non_got_ref = 0;
5630 return TRUE;
5631 }
5632 }
5633
5634 if (h->plt.plist != NULL)
5635 {
5636 /* We should never get here, but unfortunately there are versions
5637 of gcc out there that improperly (for this ABI) put initialized
5638 function pointers, vtable refs and suchlike in read-only
5639 sections. Allow them to proceed, but warn that this might
5640 break at runtime. */
5641 (*_bfd_error_handler)
5642 (_("copy reloc against `%s' requires lazy plt linking; "
5643 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5644 h->root.root.string);
5645 }
5646
5647 /* This is a reference to a symbol defined by a dynamic object which
5648 is not a function. */
5649
5650 /* We must allocate the symbol in our .dynbss section, which will
5651 become part of the .bss section of the executable. There will be
5652 an entry for this symbol in the .dynsym section. The dynamic
5653 object will contain position independent code, so all references
5654 from the dynamic object to this symbol will go through the global
5655 offset table. The dynamic linker will use the .dynsym entry to
5656 determine the address it must put in the global offset table, so
5657 both the dynamic object and the regular object will refer to the
5658 same memory location for the variable. */
5659
5660 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5661 to copy the initial value out of the dynamic object and into the
5662 runtime process image. We need to remember the offset into the
5663 .rela.bss section we are going to use. */
5664 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5665 {
5666 htab->relbss->size += sizeof (Elf64_External_Rela);
5667 h->needs_copy = 1;
5668 }
5669
5670 /* We need to figure out the alignment required for this symbol. I
5671 have no idea how ELF linkers handle this. */
5672 power_of_two = bfd_log2 (h->size);
5673 if (power_of_two > 4)
5674 power_of_two = 4;
5675
5676 /* Apply the required alignment. */
5677 s = htab->dynbss;
5678 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5679 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5680 {
5681 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5682 return FALSE;
5683 }
5684
5685 /* Define the symbol as being at this point in the section. */
5686 h->root.u.def.section = s;
5687 h->root.u.def.value = s->size;
5688
5689 /* Increment the section size to make room for the symbol. */
5690 s->size += h->size;
5691
5692 return TRUE;
5693 }
5694
5695 /* If given a function descriptor symbol, hide both the function code
5696 sym and the descriptor. */
5697 static void
5698 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5699 struct elf_link_hash_entry *h,
5700 bfd_boolean force_local)
5701 {
5702 struct ppc_link_hash_entry *eh;
5703 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5704
5705 eh = (struct ppc_link_hash_entry *) h;
5706 if (eh->is_func_descriptor)
5707 {
5708 struct ppc_link_hash_entry *fh = eh->oh;
5709
5710 if (fh == NULL)
5711 {
5712 const char *p, *q;
5713 struct ppc_link_hash_table *htab;
5714 char save;
5715
5716 /* We aren't supposed to use alloca in BFD because on
5717 systems which do not have alloca the version in libiberty
5718 calls xmalloc, which might cause the program to crash
5719 when it runs out of memory. This function doesn't have a
5720 return status, so there's no way to gracefully return an
5721 error. So cheat. We know that string[-1] can be safely
5722 accessed; It's either a string in an ELF string table,
5723 or allocated in an objalloc structure. */
5724
5725 p = eh->elf.root.root.string - 1;
5726 save = *p;
5727 *(char *) p = '.';
5728 htab = ppc_hash_table (info);
5729 fh = (struct ppc_link_hash_entry *)
5730 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5731 *(char *) p = save;
5732
5733 /* Unfortunately, if it so happens that the string we were
5734 looking for was allocated immediately before this string,
5735 then we overwrote the string terminator. That's the only
5736 reason the lookup should fail. */
5737 if (fh == NULL)
5738 {
5739 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5740 while (q >= eh->elf.root.root.string && *q == *p)
5741 --q, --p;
5742 if (q < eh->elf.root.root.string && *p == '.')
5743 fh = (struct ppc_link_hash_entry *)
5744 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5745 }
5746 if (fh != NULL)
5747 {
5748 eh->oh = fh;
5749 fh->oh = eh;
5750 }
5751 }
5752 if (fh != NULL)
5753 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5754 }
5755 }
5756
5757 static bfd_boolean
5758 get_sym_h (struct elf_link_hash_entry **hp,
5759 Elf_Internal_Sym **symp,
5760 asection **symsecp,
5761 char **tls_maskp,
5762 Elf_Internal_Sym **locsymsp,
5763 unsigned long r_symndx,
5764 bfd *ibfd)
5765 {
5766 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5767
5768 if (r_symndx >= symtab_hdr->sh_info)
5769 {
5770 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5771 struct elf_link_hash_entry *h;
5772
5773 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5774 while (h->root.type == bfd_link_hash_indirect
5775 || h->root.type == bfd_link_hash_warning)
5776 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5777
5778 if (hp != NULL)
5779 *hp = h;
5780
5781 if (symp != NULL)
5782 *symp = NULL;
5783
5784 if (symsecp != NULL)
5785 {
5786 asection *symsec = NULL;
5787 if (h->root.type == bfd_link_hash_defined
5788 || h->root.type == bfd_link_hash_defweak)
5789 symsec = h->root.u.def.section;
5790 *symsecp = symsec;
5791 }
5792
5793 if (tls_maskp != NULL)
5794 {
5795 struct ppc_link_hash_entry *eh;
5796
5797 eh = (struct ppc_link_hash_entry *) h;
5798 *tls_maskp = &eh->tls_mask;
5799 }
5800 }
5801 else
5802 {
5803 Elf_Internal_Sym *sym;
5804 Elf_Internal_Sym *locsyms = *locsymsp;
5805
5806 if (locsyms == NULL)
5807 {
5808 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5809 if (locsyms == NULL)
5810 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5811 symtab_hdr->sh_info,
5812 0, NULL, NULL, NULL);
5813 if (locsyms == NULL)
5814 return FALSE;
5815 *locsymsp = locsyms;
5816 }
5817 sym = locsyms + r_symndx;
5818
5819 if (hp != NULL)
5820 *hp = NULL;
5821
5822 if (symp != NULL)
5823 *symp = sym;
5824
5825 if (symsecp != NULL)
5826 {
5827 asection *symsec = NULL;
5828 if ((sym->st_shndx != SHN_UNDEF
5829 && sym->st_shndx < SHN_LORESERVE)
5830 || sym->st_shndx > SHN_HIRESERVE)
5831 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5832 *symsecp = symsec;
5833 }
5834
5835 if (tls_maskp != NULL)
5836 {
5837 struct got_entry **lgot_ents;
5838 char *tls_mask;
5839
5840 tls_mask = NULL;
5841 lgot_ents = elf_local_got_ents (ibfd);
5842 if (lgot_ents != NULL)
5843 {
5844 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5845 tls_mask = &lgot_masks[r_symndx];
5846 }
5847 *tls_maskp = tls_mask;
5848 }
5849 }
5850 return TRUE;
5851 }
5852
5853 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5854 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5855 type suitable for optimization, and 1 otherwise. */
5856
5857 static int
5858 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5859 Elf_Internal_Sym **locsymsp,
5860 const Elf_Internal_Rela *rel, bfd *ibfd)
5861 {
5862 unsigned long r_symndx;
5863 int next_r;
5864 struct elf_link_hash_entry *h;
5865 Elf_Internal_Sym *sym;
5866 asection *sec;
5867 bfd_vma off;
5868
5869 r_symndx = ELF64_R_SYM (rel->r_info);
5870 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5871 return 0;
5872
5873 if ((*tls_maskp != NULL && **tls_maskp != 0)
5874 || sec == NULL
5875 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5876 return 1;
5877
5878 /* Look inside a TOC section too. */
5879 if (h != NULL)
5880 {
5881 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5882 off = h->root.u.def.value;
5883 }
5884 else
5885 off = sym->st_value;
5886 off += rel->r_addend;
5887 BFD_ASSERT (off % 8 == 0);
5888 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5889 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5890 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5891 return 0;
5892 if (toc_symndx != NULL)
5893 *toc_symndx = r_symndx;
5894 if ((h == NULL
5895 || ((h->root.type == bfd_link_hash_defined
5896 || h->root.type == bfd_link_hash_defweak)
5897 && !h->def_dynamic))
5898 && (next_r == -1 || next_r == -2))
5899 return 1 - next_r;
5900 return 1;
5901 }
5902
5903 /* Adjust all global syms defined in opd sections. In gcc generated
5904 code for the old ABI, these will already have been done. */
5905
5906 static bfd_boolean
5907 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5908 {
5909 struct ppc_link_hash_entry *eh;
5910 asection *sym_sec;
5911 long *opd_adjust;
5912
5913 if (h->root.type == bfd_link_hash_indirect)
5914 return TRUE;
5915
5916 if (h->root.type == bfd_link_hash_warning)
5917 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5918
5919 if (h->root.type != bfd_link_hash_defined
5920 && h->root.type != bfd_link_hash_defweak)
5921 return TRUE;
5922
5923 eh = (struct ppc_link_hash_entry *) h;
5924 if (eh->adjust_done)
5925 return TRUE;
5926
5927 sym_sec = eh->elf.root.u.def.section;
5928 opd_adjust = get_opd_info (sym_sec);
5929 if (opd_adjust != NULL)
5930 {
5931 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5932 if (adjust == -1)
5933 {
5934 /* This entry has been deleted. */
5935 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5936 if (dsec == NULL)
5937 {
5938 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5939 if (elf_discarded_section (dsec))
5940 {
5941 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5942 break;
5943 }
5944 }
5945 eh->elf.root.u.def.value = 0;
5946 eh->elf.root.u.def.section = dsec;
5947 }
5948 else
5949 eh->elf.root.u.def.value += adjust;
5950 eh->adjust_done = 1;
5951 }
5952 return TRUE;
5953 }
5954
5955 /* Handles decrementing dynamic reloc counts for the reloc specified by
5956 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
5957 have already been determined. */
5958
5959 static bfd_boolean
5960 dec_dynrel_count (bfd_vma r_info,
5961 asection *sec,
5962 struct bfd_link_info *info,
5963 Elf_Internal_Sym **local_syms,
5964 struct elf_link_hash_entry *h,
5965 asection *sym_sec)
5966 {
5967 enum elf_ppc64_reloc_type r_type;
5968 struct ppc_dyn_relocs *p;
5969 struct ppc_dyn_relocs **pp;
5970
5971 /* Can this reloc be dynamic? This switch, and later tests here
5972 should be kept in sync with the code in check_relocs. */
5973 r_type = ELF64_R_TYPE (r_info);
5974 switch (r_type)
5975 {
5976 default:
5977 return TRUE;
5978
5979 case R_PPC64_TPREL16:
5980 case R_PPC64_TPREL16_LO:
5981 case R_PPC64_TPREL16_HI:
5982 case R_PPC64_TPREL16_HA:
5983 case R_PPC64_TPREL16_DS:
5984 case R_PPC64_TPREL16_LO_DS:
5985 case R_PPC64_TPREL16_HIGHER:
5986 case R_PPC64_TPREL16_HIGHERA:
5987 case R_PPC64_TPREL16_HIGHEST:
5988 case R_PPC64_TPREL16_HIGHESTA:
5989 if (!info->shared)
5990 return TRUE;
5991
5992 case R_PPC64_TPREL64:
5993 case R_PPC64_DTPMOD64:
5994 case R_PPC64_DTPREL64:
5995 case R_PPC64_ADDR64:
5996 case R_PPC64_REL30:
5997 case R_PPC64_REL32:
5998 case R_PPC64_REL64:
5999 case R_PPC64_ADDR14:
6000 case R_PPC64_ADDR14_BRNTAKEN:
6001 case R_PPC64_ADDR14_BRTAKEN:
6002 case R_PPC64_ADDR16:
6003 case R_PPC64_ADDR16_DS:
6004 case R_PPC64_ADDR16_HA:
6005 case R_PPC64_ADDR16_HI:
6006 case R_PPC64_ADDR16_HIGHER:
6007 case R_PPC64_ADDR16_HIGHERA:
6008 case R_PPC64_ADDR16_HIGHEST:
6009 case R_PPC64_ADDR16_HIGHESTA:
6010 case R_PPC64_ADDR16_LO:
6011 case R_PPC64_ADDR16_LO_DS:
6012 case R_PPC64_ADDR24:
6013 case R_PPC64_ADDR32:
6014 case R_PPC64_UADDR16:
6015 case R_PPC64_UADDR32:
6016 case R_PPC64_UADDR64:
6017 case R_PPC64_TOC:
6018 break;
6019 }
6020
6021 if (local_syms != NULL)
6022 {
6023 unsigned long r_symndx;
6024 Elf_Internal_Sym *sym;
6025 bfd *ibfd = sec->owner;
6026
6027 r_symndx = ELF64_R_SYM (r_info);
6028 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6029 return FALSE;
6030 }
6031
6032 if ((info->shared
6033 && (MUST_BE_DYN_RELOC (r_type)
6034 || (h != NULL
6035 && (!info->symbolic
6036 || h->root.type == bfd_link_hash_defweak
6037 || !h->def_regular))))
6038 || (ELIMINATE_COPY_RELOCS
6039 && !info->shared
6040 && h != NULL
6041 && (h->root.type == bfd_link_hash_defweak
6042 || !h->def_regular)))
6043 ;
6044 else
6045 return TRUE;
6046
6047 if (h != NULL)
6048 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6049 else if (sym_sec != NULL)
6050 pp = (struct ppc_dyn_relocs **) &elf_section_data (sym_sec)->local_dynrel;
6051 else
6052 pp = (struct ppc_dyn_relocs **) &elf_section_data (sec)->local_dynrel;
6053
6054 while ((p = *pp) != NULL)
6055 {
6056 if (p->sec == sec)
6057 {
6058 if (!MUST_BE_DYN_RELOC (r_type))
6059 p->pc_count -= 1;
6060 p->count -= 1;
6061 if (p->count == 0)
6062 *pp = p->next;
6063 return TRUE;
6064 }
6065 pp = &p->next;
6066 }
6067
6068 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6069 sec->owner, sec);
6070 bfd_set_error (bfd_error_bad_value);
6071 return FALSE;
6072 }
6073
6074 /* Remove unused Official Procedure Descriptor entries. Currently we
6075 only remove those associated with functions in discarded link-once
6076 sections, or weakly defined functions that have been overridden. It
6077 would be possible to remove many more entries for statically linked
6078 applications. */
6079
6080 bfd_boolean
6081 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6082 bfd_boolean non_overlapping)
6083 {
6084 bfd *ibfd;
6085 bfd_boolean some_edited = FALSE;
6086 asection *need_pad = NULL;
6087
6088 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6089 {
6090 asection *sec;
6091 Elf_Internal_Rela *relstart, *rel, *relend;
6092 Elf_Internal_Shdr *symtab_hdr;
6093 Elf_Internal_Sym *local_syms;
6094 struct elf_link_hash_entry **sym_hashes;
6095 bfd_vma offset;
6096 bfd_size_type amt;
6097 long *opd_adjust;
6098 bfd_boolean need_edit, add_aux_fields;
6099 bfd_size_type cnt_16b = 0;
6100
6101 sec = bfd_get_section_by_name (ibfd, ".opd");
6102 if (sec == NULL)
6103 continue;
6104
6105 amt = sec->size * sizeof (long) / 8;
6106 opd_adjust = get_opd_info (sec);
6107 if (opd_adjust == NULL)
6108 {
6109 /* check_relocs hasn't been called. Must be a ld -r link
6110 or --just-symbols object. */
6111 opd_adjust = bfd_zalloc (obfd, amt);
6112 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6113 }
6114 memset (opd_adjust, 0, amt);
6115
6116 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6117 continue;
6118
6119 if (sec->output_section == bfd_abs_section_ptr)
6120 continue;
6121
6122 /* Look through the section relocs. */
6123 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6124 continue;
6125
6126 local_syms = NULL;
6127 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6128 sym_hashes = elf_sym_hashes (ibfd);
6129
6130 /* Read the relocations. */
6131 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6132 info->keep_memory);
6133 if (relstart == NULL)
6134 return FALSE;
6135
6136 /* First run through the relocs to check they are sane, and to
6137 determine whether we need to edit this opd section. */
6138 need_edit = FALSE;
6139 need_pad = sec;
6140 offset = 0;
6141 relend = relstart + sec->reloc_count;
6142 for (rel = relstart; rel < relend; )
6143 {
6144 enum elf_ppc64_reloc_type r_type;
6145 unsigned long r_symndx;
6146 asection *sym_sec;
6147 struct elf_link_hash_entry *h;
6148 Elf_Internal_Sym *sym;
6149
6150 /* .opd contains a regular array of 16 or 24 byte entries. We're
6151 only interested in the reloc pointing to a function entry
6152 point. */
6153 if (rel->r_offset != offset
6154 || rel + 1 >= relend
6155 || (rel + 1)->r_offset != offset + 8)
6156 {
6157 /* If someone messes with .opd alignment then after a
6158 "ld -r" we might have padding in the middle of .opd.
6159 Also, there's nothing to prevent someone putting
6160 something silly in .opd with the assembler. No .opd
6161 optimization for them! */
6162 broken_opd:
6163 (*_bfd_error_handler)
6164 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6165 need_edit = FALSE;
6166 break;
6167 }
6168
6169 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6170 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6171 {
6172 (*_bfd_error_handler)
6173 (_("%B: unexpected reloc type %u in .opd section"),
6174 ibfd, r_type);
6175 need_edit = FALSE;
6176 break;
6177 }
6178
6179 r_symndx = ELF64_R_SYM (rel->r_info);
6180 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6181 r_symndx, ibfd))
6182 goto error_ret;
6183
6184 if (sym_sec == NULL || sym_sec->owner == NULL)
6185 {
6186 const char *sym_name;
6187 if (h != NULL)
6188 sym_name = h->root.root.string;
6189 else
6190 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6191 sym_sec);
6192
6193 (*_bfd_error_handler)
6194 (_("%B: undefined sym `%s' in .opd section"),
6195 ibfd, sym_name);
6196 need_edit = FALSE;
6197 break;
6198 }
6199
6200 /* opd entries are always for functions defined in the
6201 current input bfd. If the symbol isn't defined in the
6202 input bfd, then we won't be using the function in this
6203 bfd; It must be defined in a linkonce section in another
6204 bfd, or is weak. It's also possible that we are
6205 discarding the function due to a linker script /DISCARD/,
6206 which we test for via the output_section. */
6207 if (sym_sec->owner != ibfd
6208 || sym_sec->output_section == bfd_abs_section_ptr)
6209 need_edit = TRUE;
6210
6211 rel += 2;
6212 if (rel == relend
6213 || (rel + 1 == relend && rel->r_offset == offset + 16))
6214 {
6215 if (sec->size == offset + 24)
6216 {
6217 need_pad = NULL;
6218 break;
6219 }
6220 if (rel == relend && sec->size == offset + 16)
6221 {
6222 cnt_16b++;
6223 break;
6224 }
6225 goto broken_opd;
6226 }
6227
6228 if (rel->r_offset == offset + 24)
6229 offset += 24;
6230 else if (rel->r_offset != offset + 16)
6231 goto broken_opd;
6232 else if (rel + 1 < relend
6233 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6234 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6235 {
6236 offset += 16;
6237 cnt_16b++;
6238 }
6239 else if (rel + 2 < relend
6240 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6241 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6242 {
6243 offset += 24;
6244 rel += 1;
6245 }
6246 else
6247 goto broken_opd;
6248 }
6249
6250 add_aux_fields = non_overlapping && cnt_16b > 0;
6251
6252 if (need_edit || add_aux_fields)
6253 {
6254 Elf_Internal_Rela *write_rel;
6255 bfd_byte *rptr, *wptr;
6256 bfd_byte *new_contents = NULL;
6257 bfd_boolean skip;
6258 long opd_ent_size;
6259
6260 /* This seems a waste of time as input .opd sections are all
6261 zeros as generated by gcc, but I suppose there's no reason
6262 this will always be so. We might start putting something in
6263 the third word of .opd entries. */
6264 if ((sec->flags & SEC_IN_MEMORY) == 0)
6265 {
6266 bfd_byte *loc;
6267 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6268 {
6269 if (loc != NULL)
6270 free (loc);
6271 error_ret:
6272 if (local_syms != NULL
6273 && symtab_hdr->contents != (unsigned char *) local_syms)
6274 free (local_syms);
6275 if (elf_section_data (sec)->relocs != relstart)
6276 free (relstart);
6277 return FALSE;
6278 }
6279 sec->contents = loc;
6280 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6281 }
6282
6283 elf_section_data (sec)->relocs = relstart;
6284
6285 wptr = sec->contents;
6286 rptr = sec->contents;
6287 new_contents = sec->contents;
6288
6289 if (add_aux_fields)
6290 {
6291 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6292 if (new_contents == NULL)
6293 return FALSE;
6294 need_pad = FALSE;
6295 wptr = new_contents;
6296 }
6297
6298 write_rel = relstart;
6299 skip = FALSE;
6300 offset = 0;
6301 opd_ent_size = 0;
6302 for (rel = relstart; rel < relend; rel++)
6303 {
6304 unsigned long r_symndx;
6305 asection *sym_sec;
6306 struct elf_link_hash_entry *h;
6307 Elf_Internal_Sym *sym;
6308
6309 r_symndx = ELF64_R_SYM (rel->r_info);
6310 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6311 r_symndx, ibfd))
6312 goto error_ret;
6313
6314 if (rel->r_offset == offset)
6315 {
6316 struct ppc_link_hash_entry *fdh = NULL;
6317
6318 /* See if the .opd entry is full 24 byte or
6319 16 byte (with fd_aux entry overlapped with next
6320 fd_func). */
6321 opd_ent_size = 24;
6322 if ((rel + 2 == relend && sec->size == offset + 16)
6323 || (rel + 3 < relend
6324 && rel[2].r_offset == offset + 16
6325 && rel[3].r_offset == offset + 24
6326 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6327 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6328 opd_ent_size = 16;
6329
6330 if (h != NULL
6331 && h->root.root.string[0] == '.')
6332 {
6333 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6334 ppc_hash_table (info));
6335 if (fdh != NULL
6336 && fdh->elf.root.type != bfd_link_hash_defined
6337 && fdh->elf.root.type != bfd_link_hash_defweak)
6338 fdh = NULL;
6339 }
6340
6341 skip = (sym_sec->owner != ibfd
6342 || sym_sec->output_section == bfd_abs_section_ptr);
6343 if (skip)
6344 {
6345 if (fdh != NULL && sym_sec->owner == ibfd)
6346 {
6347 /* Arrange for the function descriptor sym
6348 to be dropped. */
6349 fdh->elf.root.u.def.value = 0;
6350 fdh->elf.root.u.def.section = sym_sec;
6351 }
6352 opd_adjust[rel->r_offset / 8] = -1;
6353 }
6354 else
6355 {
6356 /* We'll be keeping this opd entry. */
6357
6358 if (fdh != NULL)
6359 {
6360 /* Redefine the function descriptor symbol to
6361 this location in the opd section. It is
6362 necessary to update the value here rather
6363 than using an array of adjustments as we do
6364 for local symbols, because various places
6365 in the generic ELF code use the value
6366 stored in u.def.value. */
6367 fdh->elf.root.u.def.value = wptr - new_contents;
6368 fdh->adjust_done = 1;
6369 }
6370
6371 /* Local syms are a bit tricky. We could
6372 tweak them as they can be cached, but
6373 we'd need to look through the local syms
6374 for the function descriptor sym which we
6375 don't have at the moment. So keep an
6376 array of adjustments. */
6377 opd_adjust[rel->r_offset / 8]
6378 = (wptr - new_contents) - (rptr - sec->contents);
6379
6380 if (wptr != rptr)
6381 memcpy (wptr, rptr, opd_ent_size);
6382 wptr += opd_ent_size;
6383 if (add_aux_fields && opd_ent_size == 16)
6384 {
6385 memset (wptr, '\0', 8);
6386 wptr += 8;
6387 }
6388 }
6389 rptr += opd_ent_size;
6390 offset += opd_ent_size;
6391 }
6392
6393 if (skip)
6394 {
6395 if (!dec_dynrel_count (rel->r_info, sec, info,
6396 NULL, h, sym_sec))
6397 goto error_ret;
6398 }
6399 else
6400 {
6401 /* We need to adjust any reloc offsets to point to the
6402 new opd entries. While we're at it, we may as well
6403 remove redundant relocs. */
6404 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6405 if (write_rel != rel)
6406 memcpy (write_rel, rel, sizeof (*rel));
6407 ++write_rel;
6408 }
6409 }
6410
6411 sec->size = wptr - new_contents;
6412 sec->reloc_count = write_rel - relstart;
6413 if (add_aux_fields)
6414 {
6415 free (sec->contents);
6416 sec->contents = new_contents;
6417 }
6418
6419 /* Fudge the size too, as this is used later in
6420 elf_bfd_final_link if we are emitting relocs. */
6421 elf_section_data (sec)->rel_hdr.sh_size
6422 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6423 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6424 some_edited = TRUE;
6425 }
6426 else if (elf_section_data (sec)->relocs != relstart)
6427 free (relstart);
6428
6429 if (local_syms != NULL
6430 && symtab_hdr->contents != (unsigned char *) local_syms)
6431 {
6432 if (!info->keep_memory)
6433 free (local_syms);
6434 else
6435 symtab_hdr->contents = (unsigned char *) local_syms;
6436 }
6437 }
6438
6439 if (some_edited)
6440 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6441
6442 /* If we are doing a final link and the last .opd entry is just 16 byte
6443 long, add a 8 byte padding after it. */
6444 if (need_pad != NULL && !info->relocatable)
6445 {
6446 bfd_byte *p;
6447
6448 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6449 {
6450 BFD_ASSERT (need_pad->size > 0);
6451
6452 p = bfd_malloc (need_pad->size + 8);
6453 if (p == NULL)
6454 return FALSE;
6455
6456 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6457 p, 0, need_pad->size))
6458 return FALSE;
6459
6460 need_pad->contents = p;
6461 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6462 }
6463 else
6464 {
6465 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6466 if (p == NULL)
6467 return FALSE;
6468
6469 need_pad->contents = p;
6470 }
6471
6472 memset (need_pad->contents + need_pad->size, 0, 8);
6473 need_pad->size += 8;
6474 }
6475
6476 return TRUE;
6477 }
6478
6479 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6480
6481 asection *
6482 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6483 {
6484 struct ppc_link_hash_table *htab;
6485
6486 htab = ppc_hash_table (info);
6487 if (htab->tls_get_addr != NULL)
6488 {
6489 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6490
6491 while (h->elf.root.type == bfd_link_hash_indirect
6492 || h->elf.root.type == bfd_link_hash_warning)
6493 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6494
6495 htab->tls_get_addr = h;
6496
6497 if (htab->tls_get_addr_fd == NULL
6498 && h->oh != NULL
6499 && h->oh->is_func_descriptor
6500 && (h->oh->elf.root.type == bfd_link_hash_defined
6501 || h->oh->elf.root.type == bfd_link_hash_defweak))
6502 htab->tls_get_addr_fd = h->oh;
6503 }
6504
6505 if (htab->tls_get_addr_fd != NULL)
6506 {
6507 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6508
6509 while (h->elf.root.type == bfd_link_hash_indirect
6510 || h->elf.root.type == bfd_link_hash_warning)
6511 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6512
6513 htab->tls_get_addr_fd = h;
6514 }
6515
6516 return _bfd_elf_tls_setup (obfd, info);
6517 }
6518
6519 /* Run through all the TLS relocs looking for optimization
6520 opportunities. The linker has been hacked (see ppc64elf.em) to do
6521 a preliminary section layout so that we know the TLS segment
6522 offsets. We can't optimize earlier because some optimizations need
6523 to know the tp offset, and we need to optimize before allocating
6524 dynamic relocations. */
6525
6526 bfd_boolean
6527 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6528 {
6529 bfd *ibfd;
6530 asection *sec;
6531 struct ppc_link_hash_table *htab;
6532
6533 if (info->relocatable || info->shared)
6534 return TRUE;
6535
6536 htab = ppc_hash_table (info);
6537 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6538 {
6539 Elf_Internal_Sym *locsyms = NULL;
6540
6541 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6542 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6543 {
6544 Elf_Internal_Rela *relstart, *rel, *relend;
6545 int expecting_tls_get_addr;
6546
6547 /* Read the relocations. */
6548 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6549 info->keep_memory);
6550 if (relstart == NULL)
6551 return FALSE;
6552
6553 expecting_tls_get_addr = 0;
6554 relend = relstart + sec->reloc_count;
6555 for (rel = relstart; rel < relend; rel++)
6556 {
6557 enum elf_ppc64_reloc_type r_type;
6558 unsigned long r_symndx;
6559 struct elf_link_hash_entry *h;
6560 Elf_Internal_Sym *sym;
6561 asection *sym_sec;
6562 char *tls_mask;
6563 char tls_set, tls_clear, tls_type = 0;
6564 bfd_vma value;
6565 bfd_boolean ok_tprel, is_local;
6566
6567 r_symndx = ELF64_R_SYM (rel->r_info);
6568 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6569 r_symndx, ibfd))
6570 {
6571 err_free_rel:
6572 if (elf_section_data (sec)->relocs != relstart)
6573 free (relstart);
6574 if (locsyms != NULL
6575 && (elf_tdata (ibfd)->symtab_hdr.contents
6576 != (unsigned char *) locsyms))
6577 free (locsyms);
6578 return FALSE;
6579 }
6580
6581 if (h != NULL)
6582 {
6583 if (h->root.type != bfd_link_hash_defined
6584 && h->root.type != bfd_link_hash_defweak)
6585 continue;
6586 value = h->root.u.def.value;
6587 }
6588 else
6589 /* Symbols referenced by TLS relocs must be of type
6590 STT_TLS. So no need for .opd local sym adjust. */
6591 value = sym->st_value;
6592
6593 ok_tprel = FALSE;
6594 is_local = FALSE;
6595 if (h == NULL
6596 || !h->def_dynamic)
6597 {
6598 is_local = TRUE;
6599 value += sym_sec->output_offset;
6600 value += sym_sec->output_section->vma;
6601 value -= htab->elf.tls_sec->vma;
6602 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6603 < (bfd_vma) 1 << 32);
6604 }
6605
6606 r_type = ELF64_R_TYPE (rel->r_info);
6607 switch (r_type)
6608 {
6609 case R_PPC64_GOT_TLSLD16:
6610 case R_PPC64_GOT_TLSLD16_LO:
6611 case R_PPC64_GOT_TLSLD16_HI:
6612 case R_PPC64_GOT_TLSLD16_HA:
6613 /* These relocs should never be against a symbol
6614 defined in a shared lib. Leave them alone if
6615 that turns out to be the case. */
6616 ppc64_tlsld_got (ibfd)->refcount -= 1;
6617 if (!is_local)
6618 continue;
6619
6620 /* LD -> LE */
6621 tls_set = 0;
6622 tls_clear = TLS_LD;
6623 tls_type = TLS_TLS | TLS_LD;
6624 expecting_tls_get_addr = 1;
6625 break;
6626
6627 case R_PPC64_GOT_TLSGD16:
6628 case R_PPC64_GOT_TLSGD16_LO:
6629 case R_PPC64_GOT_TLSGD16_HI:
6630 case R_PPC64_GOT_TLSGD16_HA:
6631 if (ok_tprel)
6632 /* GD -> LE */
6633 tls_set = 0;
6634 else
6635 /* GD -> IE */
6636 tls_set = TLS_TLS | TLS_TPRELGD;
6637 tls_clear = TLS_GD;
6638 tls_type = TLS_TLS | TLS_GD;
6639 expecting_tls_get_addr = 1;
6640 break;
6641
6642 case R_PPC64_GOT_TPREL16_DS:
6643 case R_PPC64_GOT_TPREL16_LO_DS:
6644 case R_PPC64_GOT_TPREL16_HI:
6645 case R_PPC64_GOT_TPREL16_HA:
6646 expecting_tls_get_addr = 0;
6647 if (ok_tprel)
6648 {
6649 /* IE -> LE */
6650 tls_set = 0;
6651 tls_clear = TLS_TPREL;
6652 tls_type = TLS_TLS | TLS_TPREL;
6653 break;
6654 }
6655 else
6656 continue;
6657
6658 case R_PPC64_REL14:
6659 case R_PPC64_REL14_BRTAKEN:
6660 case R_PPC64_REL14_BRNTAKEN:
6661 case R_PPC64_REL24:
6662 if (h != NULL
6663 && (h == &htab->tls_get_addr->elf
6664 || h == &htab->tls_get_addr_fd->elf))
6665 {
6666 if (!expecting_tls_get_addr
6667 && rel != relstart
6668 && ((ELF64_R_TYPE (rel[-1].r_info)
6669 == R_PPC64_TOC16)
6670 || (ELF64_R_TYPE (rel[-1].r_info)
6671 == R_PPC64_TOC16_LO)))
6672 {
6673 /* Check for toc tls entries. */
6674 char *toc_tls;
6675 int retval;
6676
6677 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6678 rel - 1, ibfd);
6679 if (retval == 0)
6680 goto err_free_rel;
6681 if (toc_tls != NULL)
6682 expecting_tls_get_addr = retval > 1;
6683 }
6684
6685 if (expecting_tls_get_addr)
6686 {
6687 struct plt_entry *ent;
6688 for (ent = h->plt.plist; ent; ent = ent->next)
6689 if (ent->addend == 0)
6690 {
6691 if (ent->plt.refcount > 0)
6692 ent->plt.refcount -= 1;
6693 break;
6694 }
6695 }
6696 }
6697 expecting_tls_get_addr = 0;
6698 continue;
6699
6700 case R_PPC64_TPREL64:
6701 expecting_tls_get_addr = 0;
6702 if (ok_tprel)
6703 {
6704 /* IE -> LE */
6705 tls_set = TLS_EXPLICIT;
6706 tls_clear = TLS_TPREL;
6707 break;
6708 }
6709 else
6710 continue;
6711
6712 case R_PPC64_DTPMOD64:
6713 expecting_tls_get_addr = 0;
6714 if (rel + 1 < relend
6715 && (rel[1].r_info
6716 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6717 && rel[1].r_offset == rel->r_offset + 8)
6718 {
6719 if (ok_tprel)
6720 /* GD -> LE */
6721 tls_set = TLS_EXPLICIT | TLS_GD;
6722 else
6723 /* GD -> IE */
6724 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6725 tls_clear = TLS_GD;
6726 }
6727 else
6728 {
6729 if (!is_local)
6730 continue;
6731
6732 /* LD -> LE */
6733 tls_set = TLS_EXPLICIT;
6734 tls_clear = TLS_LD;
6735 }
6736 break;
6737
6738 default:
6739 expecting_tls_get_addr = 0;
6740 continue;
6741 }
6742
6743 if ((tls_set & TLS_EXPLICIT) == 0)
6744 {
6745 struct got_entry *ent;
6746
6747 /* Adjust got entry for this reloc. */
6748 if (h != NULL)
6749 ent = h->got.glist;
6750 else
6751 ent = elf_local_got_ents (ibfd)[r_symndx];
6752
6753 for (; ent != NULL; ent = ent->next)
6754 if (ent->addend == rel->r_addend
6755 && ent->owner == ibfd
6756 && ent->tls_type == tls_type)
6757 break;
6758 if (ent == NULL)
6759 abort ();
6760
6761 if (tls_set == 0)
6762 {
6763 /* We managed to get rid of a got entry. */
6764 if (ent->got.refcount > 0)
6765 ent->got.refcount -= 1;
6766 }
6767 }
6768 else
6769 {
6770 /* If we got rid of a DTPMOD/DTPREL reloc pair then
6771 we'll lose one or two dyn relocs. */
6772 if (!dec_dynrel_count (rel->r_info, sec, info,
6773 NULL, h, sym_sec))
6774 return FALSE;
6775
6776 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6777 {
6778 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
6779 NULL, h, sym_sec))
6780 return FALSE;
6781 }
6782 }
6783
6784 *tls_mask |= tls_set;
6785 *tls_mask &= ~tls_clear;
6786 }
6787
6788 if (elf_section_data (sec)->relocs != relstart)
6789 free (relstart);
6790 }
6791
6792 if (locsyms != NULL
6793 && (elf_tdata (ibfd)->symtab_hdr.contents
6794 != (unsigned char *) locsyms))
6795 {
6796 if (!info->keep_memory)
6797 free (locsyms);
6798 else
6799 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6800 }
6801 }
6802 return TRUE;
6803 }
6804
6805 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
6806 the values of any global symbols in a toc section that has been
6807 edited. Globals in toc sections should be a rarity, so this function
6808 sets a flag if any are found in toc sections other than the one just
6809 edited, so that futher hash table traversals can be avoided. */
6810
6811 struct adjust_toc_info
6812 {
6813 asection *toc;
6814 unsigned long *skip;
6815 bfd_boolean global_toc_syms;
6816 };
6817
6818 static bfd_boolean
6819 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
6820 {
6821 struct ppc_link_hash_entry *eh;
6822 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
6823
6824 if (h->root.type == bfd_link_hash_indirect)
6825 return TRUE;
6826
6827 if (h->root.type == bfd_link_hash_warning)
6828 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6829
6830 if (h->root.type != bfd_link_hash_defined
6831 && h->root.type != bfd_link_hash_defweak)
6832 return TRUE;
6833
6834 eh = (struct ppc_link_hash_entry *) h;
6835 if (eh->adjust_done)
6836 return TRUE;
6837
6838 if (eh->elf.root.u.def.section == toc_inf->toc)
6839 {
6840 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
6841 if (skip != (unsigned long) -1)
6842 eh->elf.root.u.def.value -= skip;
6843 else
6844 {
6845 (*_bfd_error_handler)
6846 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
6847 eh->elf.root.u.def.section = &bfd_abs_section;
6848 eh->elf.root.u.def.value = 0;
6849 }
6850 eh->adjust_done = 1;
6851 }
6852 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
6853 toc_inf->global_toc_syms = TRUE;
6854
6855 return TRUE;
6856 }
6857
6858 /* Examine all relocs referencing .toc sections in order to remove
6859 unused .toc entries. */
6860
6861 bfd_boolean
6862 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6863 {
6864 bfd *ibfd;
6865 struct adjust_toc_info toc_inf;
6866
6867 toc_inf.global_toc_syms = TRUE;
6868 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6869 {
6870 asection *toc, *sec;
6871 Elf_Internal_Shdr *symtab_hdr;
6872 Elf_Internal_Sym *local_syms;
6873 struct elf_link_hash_entry **sym_hashes;
6874 Elf_Internal_Rela *relstart, *rel;
6875 unsigned long *skip, *drop;
6876 unsigned char *used;
6877 unsigned char *keep, last, some_unused;
6878
6879 toc = bfd_get_section_by_name (ibfd, ".toc");
6880 if (toc == NULL
6881 || toc->size == 0
6882 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
6883 || elf_discarded_section (toc))
6884 continue;
6885
6886 local_syms = NULL;
6887 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6888 sym_hashes = elf_sym_hashes (ibfd);
6889
6890 /* Look at sections dropped from the final link. */
6891 skip = NULL;
6892 relstart = NULL;
6893 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6894 {
6895 if (sec->reloc_count == 0
6896 || !elf_discarded_section (sec)
6897 || get_opd_info (sec)
6898 || (sec->flags & SEC_ALLOC) == 0
6899 || (sec->flags & SEC_DEBUGGING) != 0)
6900 continue;
6901
6902 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
6903 if (relstart == NULL)
6904 goto error_ret;
6905
6906 /* Run through the relocs to see which toc entries might be
6907 unused. */
6908 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
6909 {
6910 enum elf_ppc64_reloc_type r_type;
6911 unsigned long r_symndx;
6912 asection *sym_sec;
6913 struct elf_link_hash_entry *h;
6914 Elf_Internal_Sym *sym;
6915 bfd_vma val;
6916
6917 r_type = ELF64_R_TYPE (rel->r_info);
6918 switch (r_type)
6919 {
6920 default:
6921 continue;
6922
6923 case R_PPC64_TOC16:
6924 case R_PPC64_TOC16_LO:
6925 case R_PPC64_TOC16_HI:
6926 case R_PPC64_TOC16_HA:
6927 case R_PPC64_TOC16_DS:
6928 case R_PPC64_TOC16_LO_DS:
6929 break;
6930 }
6931
6932 r_symndx = ELF64_R_SYM (rel->r_info);
6933 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6934 r_symndx, ibfd))
6935 goto error_ret;
6936
6937 if (sym_sec != toc)
6938 continue;
6939
6940 if (h != NULL)
6941 val = h->root.u.def.value;
6942 else
6943 val = sym->st_value;
6944 val += rel->r_addend;
6945
6946 if (val >= toc->size)
6947 continue;
6948
6949 /* Anything in the toc ought to be aligned to 8 bytes.
6950 If not, don't mark as unused. */
6951 if (val & 7)
6952 continue;
6953
6954 if (skip == NULL)
6955 {
6956 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
6957 if (skip == NULL)
6958 goto error_ret;
6959 }
6960
6961 skip[val >> 3] = 1;
6962 }
6963
6964 if (elf_section_data (sec)->relocs != relstart)
6965 free (relstart);
6966 }
6967
6968 if (skip == NULL)
6969 continue;
6970
6971 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
6972 if (used == NULL)
6973 {
6974 error_ret:
6975 if (local_syms != NULL
6976 && symtab_hdr->contents != (unsigned char *) local_syms)
6977 free (local_syms);
6978 if (sec != NULL
6979 && relstart != NULL
6980 && elf_section_data (sec)->relocs != relstart)
6981 free (relstart);
6982 if (skip != NULL)
6983 free (skip);
6984 return FALSE;
6985 }
6986
6987 /* Now check all kept sections that might reference the toc. */
6988 for (sec = ibfd->sections;
6989 sec != NULL;
6990 /* Check the toc itself last. */
6991 sec = (sec == toc ? NULL
6992 : sec->next == toc && sec->next->next ? sec->next->next
6993 : sec->next == NULL ? toc
6994 : sec->next))
6995 {
6996 int repeat;
6997
6998 if (sec->reloc_count == 0
6999 || elf_discarded_section (sec)
7000 || get_opd_info (sec)
7001 || (sec->flags & SEC_ALLOC) == 0
7002 || (sec->flags & SEC_DEBUGGING) != 0)
7003 continue;
7004
7005 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7006 if (relstart == NULL)
7007 goto error_ret;
7008
7009 /* Mark toc entries referenced as used. */
7010 repeat = 0;
7011 do
7012 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7013 {
7014 enum elf_ppc64_reloc_type r_type;
7015 unsigned long r_symndx;
7016 asection *sym_sec;
7017 struct elf_link_hash_entry *h;
7018 Elf_Internal_Sym *sym;
7019 bfd_vma val;
7020
7021 r_type = ELF64_R_TYPE (rel->r_info);
7022 switch (r_type)
7023 {
7024 case R_PPC64_TOC16:
7025 case R_PPC64_TOC16_LO:
7026 case R_PPC64_TOC16_HI:
7027 case R_PPC64_TOC16_HA:
7028 case R_PPC64_TOC16_DS:
7029 case R_PPC64_TOC16_LO_DS:
7030 /* In case we're taking addresses of toc entries. */
7031 case R_PPC64_ADDR64:
7032 break;
7033
7034 default:
7035 continue;
7036 }
7037
7038 r_symndx = ELF64_R_SYM (rel->r_info);
7039 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7040 r_symndx, ibfd))
7041 {
7042 free (used);
7043 goto error_ret;
7044 }
7045
7046 if (sym_sec != toc)
7047 continue;
7048
7049 if (h != NULL)
7050 val = h->root.u.def.value;
7051 else
7052 val = sym->st_value;
7053 val += rel->r_addend;
7054
7055 if (val >= toc->size)
7056 continue;
7057
7058 /* For the toc section, we only mark as used if
7059 this entry itself isn't unused. */
7060 if (sec == toc
7061 && !used[val >> 3]
7062 && (used[rel->r_offset >> 3]
7063 || !skip[rel->r_offset >> 3]))
7064 /* Do all the relocs again, to catch reference
7065 chains. */
7066 repeat = 1;
7067
7068 used[val >> 3] = 1;
7069 }
7070 while (repeat);
7071 }
7072
7073 /* Merge the used and skip arrays. Assume that TOC
7074 doublewords not appearing as either used or unused belong
7075 to to an entry more than one doubleword in size. */
7076 for (drop = skip, keep = used, last = 0, some_unused = 0;
7077 drop < skip + (toc->size + 7) / 8;
7078 ++drop, ++keep)
7079 {
7080 if (*keep)
7081 {
7082 *drop = 0;
7083 last = 0;
7084 }
7085 else if (*drop)
7086 {
7087 some_unused = 1;
7088 last = 1;
7089 }
7090 else
7091 *drop = last;
7092 }
7093
7094 free (used);
7095
7096 if (some_unused)
7097 {
7098 bfd_byte *contents, *src;
7099 unsigned long off;
7100
7101 /* Shuffle the toc contents, and at the same time convert the
7102 skip array from booleans into offsets. */
7103 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7104 goto error_ret;
7105
7106 elf_section_data (toc)->this_hdr.contents = contents;
7107
7108 for (src = contents, off = 0, drop = skip;
7109 src < contents + toc->size;
7110 src += 8, ++drop)
7111 {
7112 if (*drop)
7113 {
7114 *drop = (unsigned long) -1;
7115 off += 8;
7116 }
7117 else if (off != 0)
7118 {
7119 *drop = off;
7120 memcpy (src - off, src, 8);
7121 }
7122 }
7123 toc->rawsize = toc->size;
7124 toc->size = src - contents - off;
7125
7126 if (toc->reloc_count != 0)
7127 {
7128 Elf_Internal_Rela *wrel;
7129 bfd_size_type sz;
7130
7131 /* Read toc relocs. */
7132 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7133 TRUE);
7134 if (relstart == NULL)
7135 goto error_ret;
7136
7137 /* Remove unused toc relocs, and adjust those we keep. */
7138 wrel = relstart;
7139 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7140 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7141 {
7142 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7143 wrel->r_info = rel->r_info;
7144 wrel->r_addend = rel->r_addend;
7145 ++wrel;
7146 }
7147 else if (!dec_dynrel_count (rel->r_info, toc, info,
7148 &local_syms, NULL, NULL))
7149 goto error_ret;
7150
7151 toc->reloc_count = wrel - relstart;
7152 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7153 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7154 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7155 }
7156
7157 /* Adjust addends for relocs against the toc section sym. */
7158 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7159 {
7160 if (sec->reloc_count == 0
7161 || elf_discarded_section (sec))
7162 continue;
7163
7164 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7165 TRUE);
7166 if (relstart == NULL)
7167 goto error_ret;
7168
7169 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7170 {
7171 enum elf_ppc64_reloc_type r_type;
7172 unsigned long r_symndx;
7173 asection *sym_sec;
7174 struct elf_link_hash_entry *h;
7175 Elf_Internal_Sym *sym;
7176
7177 r_type = ELF64_R_TYPE (rel->r_info);
7178 switch (r_type)
7179 {
7180 default:
7181 continue;
7182
7183 case R_PPC64_TOC16:
7184 case R_PPC64_TOC16_LO:
7185 case R_PPC64_TOC16_HI:
7186 case R_PPC64_TOC16_HA:
7187 case R_PPC64_TOC16_DS:
7188 case R_PPC64_TOC16_LO_DS:
7189 case R_PPC64_ADDR64:
7190 break;
7191 }
7192
7193 r_symndx = ELF64_R_SYM (rel->r_info);
7194 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7195 r_symndx, ibfd))
7196 goto error_ret;
7197
7198 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7199 continue;
7200
7201 rel->r_addend -= skip[rel->r_addend >> 3];
7202 }
7203 }
7204
7205 /* We shouldn't have local or global symbols defined in the TOC,
7206 but handle them anyway. */
7207 if (local_syms != NULL)
7208 {
7209 Elf_Internal_Sym *sym;
7210
7211 for (sym = local_syms;
7212 sym < local_syms + symtab_hdr->sh_info;
7213 ++sym)
7214 if (sym->st_shndx != SHN_UNDEF
7215 && (sym->st_shndx < SHN_LORESERVE
7216 || sym->st_shndx > SHN_HIRESERVE)
7217 && sym->st_value != 0
7218 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7219 {
7220 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7221 sym->st_value -= skip[sym->st_value >> 3];
7222 else
7223 {
7224 (*_bfd_error_handler)
7225 (_("%s defined in removed toc entry"),
7226 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7227 NULL));
7228 sym->st_value = 0;
7229 sym->st_shndx = SHN_ABS;
7230 }
7231 symtab_hdr->contents = (unsigned char *) local_syms;
7232 }
7233 }
7234
7235 /* Finally, adjust any global syms defined in the toc. */
7236 if (toc_inf.global_toc_syms)
7237 {
7238 toc_inf.toc = toc;
7239 toc_inf.skip = skip;
7240 toc_inf.global_toc_syms = FALSE;
7241 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7242 &toc_inf);
7243 }
7244 }
7245
7246 if (local_syms != NULL
7247 && symtab_hdr->contents != (unsigned char *) local_syms)
7248 {
7249 if (!info->keep_memory)
7250 free (local_syms);
7251 else
7252 symtab_hdr->contents = (unsigned char *) local_syms;
7253 }
7254 free (skip);
7255 }
7256
7257 return TRUE;
7258 }
7259
7260 /* Allocate space in .plt, .got and associated reloc sections for
7261 dynamic relocs. */
7262
7263 static bfd_boolean
7264 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7265 {
7266 struct bfd_link_info *info;
7267 struct ppc_link_hash_table *htab;
7268 asection *s;
7269 struct ppc_link_hash_entry *eh;
7270 struct ppc_dyn_relocs *p;
7271 struct got_entry *gent;
7272
7273 if (h->root.type == bfd_link_hash_indirect)
7274 return TRUE;
7275
7276 if (h->root.type == bfd_link_hash_warning)
7277 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7278
7279 info = (struct bfd_link_info *) inf;
7280 htab = ppc_hash_table (info);
7281
7282 if (htab->elf.dynamic_sections_created
7283 && h->dynindx != -1
7284 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7285 {
7286 struct plt_entry *pent;
7287 bfd_boolean doneone = FALSE;
7288 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7289 if (pent->plt.refcount > 0)
7290 {
7291 /* If this is the first .plt entry, make room for the special
7292 first entry. */
7293 s = htab->plt;
7294 if (s->size == 0)
7295 s->size += PLT_INITIAL_ENTRY_SIZE;
7296
7297 pent->plt.offset = s->size;
7298
7299 /* Make room for this entry. */
7300 s->size += PLT_ENTRY_SIZE;
7301
7302 /* Make room for the .glink code. */
7303 s = htab->glink;
7304 if (s->size == 0)
7305 s->size += GLINK_CALL_STUB_SIZE;
7306 /* We need bigger stubs past index 32767. */
7307 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7308 s->size += 4;
7309 s->size += 2*4;
7310
7311 /* We also need to make an entry in the .rela.plt section. */
7312 s = htab->relplt;
7313 s->size += sizeof (Elf64_External_Rela);
7314 doneone = TRUE;
7315 }
7316 else
7317 pent->plt.offset = (bfd_vma) -1;
7318 if (!doneone)
7319 {
7320 h->plt.plist = NULL;
7321 h->needs_plt = 0;
7322 }
7323 }
7324 else
7325 {
7326 h->plt.plist = NULL;
7327 h->needs_plt = 0;
7328 }
7329
7330 eh = (struct ppc_link_hash_entry *) h;
7331 /* Run through the TLS GD got entries first if we're changing them
7332 to TPREL. */
7333 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7334 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7335 if (gent->got.refcount > 0
7336 && (gent->tls_type & TLS_GD) != 0)
7337 {
7338 /* This was a GD entry that has been converted to TPREL. If
7339 there happens to be a TPREL entry we can use that one. */
7340 struct got_entry *ent;
7341 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7342 if (ent->got.refcount > 0
7343 && (ent->tls_type & TLS_TPREL) != 0
7344 && ent->addend == gent->addend
7345 && ent->owner == gent->owner)
7346 {
7347 gent->got.refcount = 0;
7348 break;
7349 }
7350
7351 /* If not, then we'll be using our own TPREL entry. */
7352 if (gent->got.refcount != 0)
7353 gent->tls_type = TLS_TLS | TLS_TPREL;
7354 }
7355
7356 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7357 if (gent->got.refcount > 0)
7358 {
7359 bfd_boolean dyn;
7360
7361 /* Make sure this symbol is output as a dynamic symbol.
7362 Undefined weak syms won't yet be marked as dynamic,
7363 nor will all TLS symbols. */
7364 if (h->dynindx == -1
7365 && !h->forced_local)
7366 {
7367 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7368 return FALSE;
7369 }
7370
7371 if ((gent->tls_type & TLS_LD) != 0
7372 && !h->def_dynamic)
7373 {
7374 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7375 continue;
7376 }
7377
7378 s = ppc64_elf_tdata (gent->owner)->got;
7379 gent->got.offset = s->size;
7380 s->size
7381 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7382 dyn = htab->elf.dynamic_sections_created;
7383 if ((info->shared
7384 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7385 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7386 || h->root.type != bfd_link_hash_undefweak))
7387 ppc64_elf_tdata (gent->owner)->relgot->size
7388 += (gent->tls_type & eh->tls_mask & TLS_GD
7389 ? 2 * sizeof (Elf64_External_Rela)
7390 : sizeof (Elf64_External_Rela));
7391 }
7392 else
7393 gent->got.offset = (bfd_vma) -1;
7394
7395 if (eh->dyn_relocs == NULL)
7396 return TRUE;
7397
7398 /* In the shared -Bsymbolic case, discard space allocated for
7399 dynamic pc-relative relocs against symbols which turn out to be
7400 defined in regular objects. For the normal shared case, discard
7401 space for relocs that have become local due to symbol visibility
7402 changes. */
7403
7404 if (info->shared)
7405 {
7406 /* Relocs that use pc_count are those that appear on a call insn,
7407 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7408 generated via assembly. We want calls to protected symbols to
7409 resolve directly to the function rather than going via the plt.
7410 If people want function pointer comparisons to work as expected
7411 then they should avoid writing weird assembly. */
7412 if (SYMBOL_CALLS_LOCAL (info, h))
7413 {
7414 struct ppc_dyn_relocs **pp;
7415
7416 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7417 {
7418 p->count -= p->pc_count;
7419 p->pc_count = 0;
7420 if (p->count == 0)
7421 *pp = p->next;
7422 else
7423 pp = &p->next;
7424 }
7425 }
7426
7427 /* Also discard relocs on undefined weak syms with non-default
7428 visibility. */
7429 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7430 && h->root.type == bfd_link_hash_undefweak)
7431 eh->dyn_relocs = NULL;
7432 }
7433 else if (ELIMINATE_COPY_RELOCS)
7434 {
7435 /* For the non-shared case, discard space for relocs against
7436 symbols which turn out to need copy relocs or are not
7437 dynamic. */
7438
7439 if (!h->non_got_ref
7440 && h->def_dynamic
7441 && !h->def_regular)
7442 {
7443 /* Make sure this symbol is output as a dynamic symbol.
7444 Undefined weak syms won't yet be marked as dynamic. */
7445 if (h->dynindx == -1
7446 && !h->forced_local)
7447 {
7448 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7449 return FALSE;
7450 }
7451
7452 /* If that succeeded, we know we'll be keeping all the
7453 relocs. */
7454 if (h->dynindx != -1)
7455 goto keep;
7456 }
7457
7458 eh->dyn_relocs = NULL;
7459
7460 keep: ;
7461 }
7462
7463 /* Finally, allocate space. */
7464 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7465 {
7466 asection *sreloc = elf_section_data (p->sec)->sreloc;
7467 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7468 }
7469
7470 return TRUE;
7471 }
7472
7473 /* Find any dynamic relocs that apply to read-only sections. */
7474
7475 static bfd_boolean
7476 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7477 {
7478 struct ppc_link_hash_entry *eh;
7479 struct ppc_dyn_relocs *p;
7480
7481 if (h->root.type == bfd_link_hash_warning)
7482 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7483
7484 eh = (struct ppc_link_hash_entry *) h;
7485 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7486 {
7487 asection *s = p->sec->output_section;
7488
7489 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7490 {
7491 struct bfd_link_info *info = inf;
7492
7493 info->flags |= DF_TEXTREL;
7494
7495 /* Not an error, just cut short the traversal. */
7496 return FALSE;
7497 }
7498 }
7499 return TRUE;
7500 }
7501
7502 /* Set the sizes of the dynamic sections. */
7503
7504 static bfd_boolean
7505 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7506 struct bfd_link_info *info)
7507 {
7508 struct ppc_link_hash_table *htab;
7509 bfd *dynobj;
7510 asection *s;
7511 bfd_boolean relocs;
7512 bfd *ibfd;
7513
7514 htab = ppc_hash_table (info);
7515 dynobj = htab->elf.dynobj;
7516 if (dynobj == NULL)
7517 abort ();
7518
7519 if (htab->elf.dynamic_sections_created)
7520 {
7521 /* Set the contents of the .interp section to the interpreter. */
7522 if (info->executable)
7523 {
7524 s = bfd_get_section_by_name (dynobj, ".interp");
7525 if (s == NULL)
7526 abort ();
7527 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7528 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7529 }
7530 }
7531
7532 /* Set up .got offsets for local syms, and space for local dynamic
7533 relocs. */
7534 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7535 {
7536 struct got_entry **lgot_ents;
7537 struct got_entry **end_lgot_ents;
7538 char *lgot_masks;
7539 bfd_size_type locsymcount;
7540 Elf_Internal_Shdr *symtab_hdr;
7541 asection *srel;
7542
7543 if (!is_ppc64_elf_target (ibfd->xvec))
7544 continue;
7545
7546 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7547 {
7548 s = ppc64_elf_tdata (ibfd)->got;
7549 ppc64_tlsld_got (ibfd)->offset = s->size;
7550 s->size += 16;
7551 if (info->shared)
7552 {
7553 srel = ppc64_elf_tdata (ibfd)->relgot;
7554 srel->size += sizeof (Elf64_External_Rela);
7555 }
7556 }
7557 else
7558 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7559
7560 for (s = ibfd->sections; s != NULL; s = s->next)
7561 {
7562 struct ppc_dyn_relocs *p;
7563
7564 for (p = *((struct ppc_dyn_relocs **)
7565 &elf_section_data (s)->local_dynrel);
7566 p != NULL;
7567 p = p->next)
7568 {
7569 if (!bfd_is_abs_section (p->sec)
7570 && bfd_is_abs_section (p->sec->output_section))
7571 {
7572 /* Input section has been discarded, either because
7573 it is a copy of a linkonce section or due to
7574 linker script /DISCARD/, so we'll be discarding
7575 the relocs too. */
7576 }
7577 else if (p->count != 0)
7578 {
7579 srel = elf_section_data (p->sec)->sreloc;
7580 srel->size += p->count * sizeof (Elf64_External_Rela);
7581 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7582 info->flags |= DF_TEXTREL;
7583 }
7584 }
7585 }
7586
7587 lgot_ents = elf_local_got_ents (ibfd);
7588 if (!lgot_ents)
7589 continue;
7590
7591 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7592 locsymcount = symtab_hdr->sh_info;
7593 end_lgot_ents = lgot_ents + locsymcount;
7594 lgot_masks = (char *) end_lgot_ents;
7595 s = ppc64_elf_tdata (ibfd)->got;
7596 srel = ppc64_elf_tdata (ibfd)->relgot;
7597 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7598 {
7599 struct got_entry *ent;
7600
7601 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7602 if (ent->got.refcount > 0)
7603 {
7604 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7605 {
7606 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7607 {
7608 ppc64_tlsld_got (ibfd)->offset = s->size;
7609 s->size += 16;
7610 if (info->shared)
7611 srel->size += sizeof (Elf64_External_Rela);
7612 }
7613 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7614 }
7615 else
7616 {
7617 ent->got.offset = s->size;
7618 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7619 {
7620 s->size += 16;
7621 if (info->shared)
7622 srel->size += 2 * sizeof (Elf64_External_Rela);
7623 }
7624 else
7625 {
7626 s->size += 8;
7627 if (info->shared)
7628 srel->size += sizeof (Elf64_External_Rela);
7629 }
7630 }
7631 }
7632 else
7633 ent->got.offset = (bfd_vma) -1;
7634 }
7635 }
7636
7637 /* Allocate global sym .plt and .got entries, and space for global
7638 sym dynamic relocs. */
7639 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7640
7641 /* We now have determined the sizes of the various dynamic sections.
7642 Allocate memory for them. */
7643 relocs = FALSE;
7644 for (s = dynobj->sections; s != NULL; s = s->next)
7645 {
7646 if ((s->flags & SEC_LINKER_CREATED) == 0)
7647 continue;
7648
7649 if (s == htab->brlt || s == htab->relbrlt)
7650 /* These haven't been allocated yet; don't strip. */
7651 continue;
7652 else if (s == htab->got
7653 || s == htab->plt
7654 || s == htab->glink)
7655 {
7656 /* Strip this section if we don't need it; see the
7657 comment below. */
7658 }
7659 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7660 {
7661 if (s->size == 0)
7662 {
7663 /* If we don't need this section, strip it from the
7664 output file. This is mostly to handle .rela.bss and
7665 .rela.plt. We must create both sections in
7666 create_dynamic_sections, because they must be created
7667 before the linker maps input sections to output
7668 sections. The linker does that before
7669 adjust_dynamic_symbol is called, and it is that
7670 function which decides whether anything needs to go
7671 into these sections. */
7672 }
7673 else
7674 {
7675 if (s != htab->relplt)
7676 relocs = TRUE;
7677
7678 /* We use the reloc_count field as a counter if we need
7679 to copy relocs into the output file. */
7680 s->reloc_count = 0;
7681 }
7682 }
7683 else
7684 {
7685 /* It's not one of our sections, so don't allocate space. */
7686 continue;
7687 }
7688
7689 if (s->size == 0)
7690 {
7691 s->flags |= SEC_EXCLUDE;
7692 continue;
7693 }
7694
7695 /* .plt is in the bss section. We don't initialise it. */
7696 if (s == htab->plt)
7697 continue;
7698
7699 /* Allocate memory for the section contents. We use bfd_zalloc
7700 here in case unused entries are not reclaimed before the
7701 section's contents are written out. This should not happen,
7702 but this way if it does we get a R_PPC64_NONE reloc in .rela
7703 sections instead of garbage.
7704 We also rely on the section contents being zero when writing
7705 the GOT. */
7706 s->contents = bfd_zalloc (dynobj, s->size);
7707 if (s->contents == NULL)
7708 return FALSE;
7709 }
7710
7711 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7712 {
7713 if (!is_ppc64_elf_target (ibfd->xvec))
7714 continue;
7715
7716 s = ppc64_elf_tdata (ibfd)->got;
7717 if (s != NULL && s != htab->got)
7718 {
7719 if (s->size == 0)
7720 s->flags |= SEC_EXCLUDE;
7721 else
7722 {
7723 s->contents = bfd_zalloc (ibfd, s->size);
7724 if (s->contents == NULL)
7725 return FALSE;
7726 }
7727 }
7728 s = ppc64_elf_tdata (ibfd)->relgot;
7729 if (s != NULL)
7730 {
7731 if (s->size == 0)
7732 s->flags |= SEC_EXCLUDE;
7733 else
7734 {
7735 s->contents = bfd_zalloc (ibfd, s->size);
7736 if (s->contents == NULL)
7737 return FALSE;
7738 relocs = TRUE;
7739 s->reloc_count = 0;
7740 }
7741 }
7742 }
7743
7744 if (htab->elf.dynamic_sections_created)
7745 {
7746 /* Add some entries to the .dynamic section. We fill in the
7747 values later, in ppc64_elf_finish_dynamic_sections, but we
7748 must add the entries now so that we get the correct size for
7749 the .dynamic section. The DT_DEBUG entry is filled in by the
7750 dynamic linker and used by the debugger. */
7751 #define add_dynamic_entry(TAG, VAL) \
7752 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7753
7754 if (info->executable)
7755 {
7756 if (!add_dynamic_entry (DT_DEBUG, 0))
7757 return FALSE;
7758 }
7759
7760 if (htab->plt != NULL && htab->plt->size != 0)
7761 {
7762 if (!add_dynamic_entry (DT_PLTGOT, 0)
7763 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7764 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7765 || !add_dynamic_entry (DT_JMPREL, 0)
7766 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
7767 return FALSE;
7768 }
7769
7770 if (NO_OPD_RELOCS)
7771 {
7772 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
7773 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
7774 return FALSE;
7775 }
7776
7777 if (relocs)
7778 {
7779 if (!add_dynamic_entry (DT_RELA, 0)
7780 || !add_dynamic_entry (DT_RELASZ, 0)
7781 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
7782 return FALSE;
7783
7784 /* If any dynamic relocs apply to a read-only section,
7785 then we need a DT_TEXTREL entry. */
7786 if ((info->flags & DF_TEXTREL) == 0)
7787 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
7788
7789 if ((info->flags & DF_TEXTREL) != 0)
7790 {
7791 if (!add_dynamic_entry (DT_TEXTREL, 0))
7792 return FALSE;
7793 }
7794 }
7795 }
7796 #undef add_dynamic_entry
7797
7798 return TRUE;
7799 }
7800
7801 /* Determine the type of stub needed, if any, for a call. */
7802
7803 static inline enum ppc_stub_type
7804 ppc_type_of_stub (asection *input_sec,
7805 const Elf_Internal_Rela *rel,
7806 struct ppc_link_hash_entry **hash,
7807 bfd_vma destination)
7808 {
7809 struct ppc_link_hash_entry *h = *hash;
7810 bfd_vma location;
7811 bfd_vma branch_offset;
7812 bfd_vma max_branch_offset;
7813 enum elf_ppc64_reloc_type r_type;
7814
7815 if (h != NULL)
7816 {
7817 if (h->oh != NULL
7818 && h->oh->is_func_descriptor)
7819 h = h->oh;
7820
7821 if (h->elf.dynindx != -1)
7822 {
7823 struct plt_entry *ent;
7824
7825 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7826 if (ent->addend == rel->r_addend
7827 && ent->plt.offset != (bfd_vma) -1)
7828 {
7829 *hash = h;
7830 return ppc_stub_plt_call;
7831 }
7832 }
7833
7834 if (!(h->elf.root.type == bfd_link_hash_defined
7835 || h->elf.root.type == bfd_link_hash_defweak)
7836 || h->elf.root.u.def.section->output_section == NULL)
7837 return ppc_stub_none;
7838 }
7839
7840 /* Determine where the call point is. */
7841 location = (input_sec->output_offset
7842 + input_sec->output_section->vma
7843 + rel->r_offset);
7844
7845 branch_offset = destination - location;
7846 r_type = ELF64_R_TYPE (rel->r_info);
7847
7848 /* Determine if a long branch stub is needed. */
7849 max_branch_offset = 1 << 25;
7850 if (r_type != R_PPC64_REL24)
7851 max_branch_offset = 1 << 15;
7852
7853 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7854 /* We need a stub. Figure out whether a long_branch or plt_branch
7855 is needed later. */
7856 return ppc_stub_long_branch;
7857
7858 return ppc_stub_none;
7859 }
7860
7861 /* Build a .plt call stub. */
7862
7863 static inline bfd_byte *
7864 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7865 {
7866 #define PPC_LO(v) ((v) & 0xffff)
7867 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7868 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7869
7870 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7871 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7872 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7873 if (PPC_HA (offset + 8) != PPC_HA (offset))
7874 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7875 offset += 8;
7876 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7877 if (PPC_HA (offset + 8) != PPC_HA (offset))
7878 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7879 offset += 8;
7880 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7881 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7882 bfd_put_32 (obfd, BCTR, p), p += 4;
7883 return p;
7884 }
7885
7886 static bfd_boolean
7887 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7888 {
7889 struct ppc_stub_hash_entry *stub_entry;
7890 struct ppc_branch_hash_entry *br_entry;
7891 struct bfd_link_info *info;
7892 struct ppc_link_hash_table *htab;
7893 bfd_byte *loc;
7894 bfd_byte *p;
7895 unsigned int indx;
7896 struct plt_entry *ent;
7897 bfd_vma dest, off;
7898 int size;
7899
7900 /* Massage our args to the form they really have. */
7901 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7902 info = in_arg;
7903
7904 htab = ppc_hash_table (info);
7905
7906 /* Make a note of the offset within the stubs for this entry. */
7907 stub_entry->stub_offset = stub_entry->stub_sec->size;
7908 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7909
7910 htab->stub_count[stub_entry->stub_type - 1] += 1;
7911 switch (stub_entry->stub_type)
7912 {
7913 case ppc_stub_long_branch:
7914 case ppc_stub_long_branch_r2off:
7915 /* Branches are relative. This is where we are going to. */
7916 off = dest = (stub_entry->target_value
7917 + stub_entry->target_section->output_offset
7918 + stub_entry->target_section->output_section->vma);
7919
7920 /* And this is where we are coming from. */
7921 off -= (stub_entry->stub_offset
7922 + stub_entry->stub_sec->output_offset
7923 + stub_entry->stub_sec->output_section->vma);
7924
7925 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7926 size = 4;
7927 else
7928 {
7929 bfd_vma r2off;
7930
7931 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7932 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7933 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7934 loc += 4;
7935 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7936 loc += 4;
7937 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7938 loc += 4;
7939 off -= 12;
7940 size = 16;
7941 }
7942 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7943
7944 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7945
7946 if (info->emitrelocations)
7947 {
7948 Elf_Internal_Rela *relocs, *r;
7949 struct bfd_elf_section_data *elfsec_data;
7950
7951 elfsec_data = elf_section_data (stub_entry->stub_sec);
7952 relocs = elfsec_data->relocs;
7953 if (relocs == NULL)
7954 {
7955 bfd_size_type relsize;
7956 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
7957 relocs = bfd_alloc (htab->stub_bfd, relsize);
7958 if (relocs == NULL)
7959 return FALSE;
7960 elfsec_data->relocs = relocs;
7961 elfsec_data->rel_hdr.sh_size = relsize;
7962 elfsec_data->rel_hdr.sh_entsize = 24;
7963 stub_entry->stub_sec->reloc_count = 0;
7964 }
7965 r = relocs + stub_entry->stub_sec->reloc_count;
7966 stub_entry->stub_sec->reloc_count += 1;
7967 r->r_offset = loc - stub_entry->stub_sec->contents;
7968 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
7969 r->r_addend = dest;
7970 if (stub_entry->h != NULL)
7971 {
7972 struct elf_link_hash_entry **hashes;
7973 unsigned long symndx;
7974 struct ppc_link_hash_entry *h;
7975
7976 hashes = elf_sym_hashes (htab->stub_bfd);
7977 if (hashes == NULL)
7978 {
7979 bfd_size_type hsize;
7980
7981 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
7982 hashes = bfd_zalloc (htab->stub_bfd, hsize);
7983 if (hashes == NULL)
7984 return FALSE;
7985 elf_sym_hashes (htab->stub_bfd) = hashes;
7986 htab->stub_globals = 1;
7987 }
7988 symndx = htab->stub_globals++;
7989 h = stub_entry->h;
7990 hashes[symndx] = &h->elf;
7991 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
7992 if (h->oh != NULL && h->oh->is_func)
7993 h = h->oh;
7994 if (h->elf.root.u.def.section != stub_entry->target_section)
7995 /* H is an opd symbol. The addend must be zero. */
7996 r->r_addend = 0;
7997 else
7998 {
7999 off = (h->elf.root.u.def.value
8000 + h->elf.root.u.def.section->output_offset
8001 + h->elf.root.u.def.section->output_section->vma);
8002 r->r_addend -= off;
8003 }
8004 }
8005 }
8006 break;
8007
8008 case ppc_stub_plt_branch:
8009 case ppc_stub_plt_branch_r2off:
8010 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8011 stub_entry->root.string + 9,
8012 FALSE, FALSE);
8013 if (br_entry == NULL)
8014 {
8015 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8016 stub_entry->root.string + 9);
8017 htab->stub_error = TRUE;
8018 return FALSE;
8019 }
8020
8021 off = (stub_entry->target_value
8022 + stub_entry->target_section->output_offset
8023 + stub_entry->target_section->output_section->vma);
8024
8025 bfd_put_64 (htab->brlt->owner, off,
8026 htab->brlt->contents + br_entry->offset);
8027
8028 if (htab->relbrlt != NULL)
8029 {
8030 /* Create a reloc for the branch lookup table entry. */
8031 Elf_Internal_Rela rela;
8032 bfd_byte *rl;
8033
8034 rela.r_offset = (br_entry->offset
8035 + htab->brlt->output_offset
8036 + htab->brlt->output_section->vma);
8037 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8038 rela.r_addend = off;
8039
8040 rl = htab->relbrlt->contents;
8041 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8042 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8043 }
8044
8045 off = (br_entry->offset
8046 + htab->brlt->output_offset
8047 + htab->brlt->output_section->vma
8048 - elf_gp (htab->brlt->output_section->owner)
8049 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8050
8051 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8052 {
8053 (*_bfd_error_handler)
8054 (_("linkage table error against `%s'"),
8055 stub_entry->root.string);
8056 bfd_set_error (bfd_error_bad_value);
8057 htab->stub_error = TRUE;
8058 return FALSE;
8059 }
8060
8061 indx = off;
8062 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8063 {
8064 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8065 loc += 4;
8066 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8067 size = 16;
8068 }
8069 else
8070 {
8071 bfd_vma r2off;
8072
8073 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8074 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8075 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8076 loc += 4;
8077 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8078 loc += 4;
8079 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8080 loc += 4;
8081 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8082 loc += 4;
8083 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8084 size = 28;
8085 }
8086 loc += 4;
8087 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8088 loc += 4;
8089 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8090 break;
8091
8092 case ppc_stub_plt_call:
8093 /* Do the best we can for shared libraries built without
8094 exporting ".foo" for each "foo". This can happen when symbol
8095 versioning scripts strip all bar a subset of symbols. */
8096 if (stub_entry->h->oh != NULL
8097 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8098 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8099 {
8100 /* Point the symbol at the stub. There may be multiple stubs,
8101 we don't really care; The main thing is to make this sym
8102 defined somewhere. Maybe defining the symbol in the stub
8103 section is a silly idea. If we didn't do this, htab->top_id
8104 could disappear. */
8105 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8106 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8107 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8108 }
8109
8110 /* Now build the stub. */
8111 off = (bfd_vma) -1;
8112 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8113 if (ent->addend == stub_entry->addend)
8114 {
8115 off = ent->plt.offset;
8116 break;
8117 }
8118 if (off >= (bfd_vma) -2)
8119 abort ();
8120
8121 off &= ~ (bfd_vma) 1;
8122 off += (htab->plt->output_offset
8123 + htab->plt->output_section->vma
8124 - elf_gp (htab->plt->output_section->owner)
8125 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8126
8127 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8128 {
8129 (*_bfd_error_handler)
8130 (_("linkage table error against `%s'"),
8131 stub_entry->h->elf.root.root.string);
8132 bfd_set_error (bfd_error_bad_value);
8133 htab->stub_error = TRUE;
8134 return FALSE;
8135 }
8136
8137 p = build_plt_stub (htab->stub_bfd, loc, off);
8138 size = p - loc;
8139 break;
8140
8141 default:
8142 BFD_FAIL ();
8143 return FALSE;
8144 }
8145
8146 stub_entry->stub_sec->size += size;
8147
8148 if (htab->emit_stub_syms)
8149 {
8150 struct elf_link_hash_entry *h;
8151 size_t len1, len2;
8152 char *name;
8153 const char *const stub_str[] = { "long_branch",
8154 "long_branch_r2off",
8155 "plt_branch",
8156 "plt_branch_r2off",
8157 "plt_call" };
8158
8159 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8160 len2 = strlen (stub_entry->root.string);
8161 name = bfd_malloc (len1 + len2 + 2);
8162 if (name == NULL)
8163 return FALSE;
8164 memcpy (name, stub_entry->root.string, 9);
8165 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8166 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8167 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8168 if (h == NULL)
8169 return FALSE;
8170 if (h->root.type == bfd_link_hash_new)
8171 {
8172 h->root.type = bfd_link_hash_defined;
8173 h->root.u.def.section = stub_entry->stub_sec;
8174 h->root.u.def.value = stub_entry->stub_offset;
8175 h->ref_regular = 1;
8176 h->def_regular = 1;
8177 h->ref_regular_nonweak = 1;
8178 h->forced_local = 1;
8179 h->non_elf = 0;
8180 }
8181 }
8182
8183 return TRUE;
8184 }
8185
8186 /* As above, but don't actually build the stub. Just bump offset so
8187 we know stub section sizes, and select plt_branch stubs where
8188 long_branch stubs won't do. */
8189
8190 static bfd_boolean
8191 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8192 {
8193 struct ppc_stub_hash_entry *stub_entry;
8194 struct bfd_link_info *info;
8195 struct ppc_link_hash_table *htab;
8196 bfd_vma off;
8197 int size;
8198
8199 /* Massage our args to the form they really have. */
8200 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8201 info = in_arg;
8202
8203 htab = ppc_hash_table (info);
8204
8205 if (stub_entry->stub_type == ppc_stub_plt_call)
8206 {
8207 struct plt_entry *ent;
8208 off = (bfd_vma) -1;
8209 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8210 if (ent->addend == stub_entry->addend)
8211 {
8212 off = ent->plt.offset & ~(bfd_vma) 1;
8213 break;
8214 }
8215 if (off >= (bfd_vma) -2)
8216 abort ();
8217 off += (htab->plt->output_offset
8218 + htab->plt->output_section->vma
8219 - elf_gp (htab->plt->output_section->owner)
8220 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8221
8222 size = PLT_CALL_STUB_SIZE;
8223 if (PPC_HA (off + 16) != PPC_HA (off))
8224 size += 4;
8225 }
8226 else
8227 {
8228 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8229 variants. */
8230 off = (stub_entry->target_value
8231 + stub_entry->target_section->output_offset
8232 + stub_entry->target_section->output_section->vma);
8233 off -= (stub_entry->stub_sec->size
8234 + stub_entry->stub_sec->output_offset
8235 + stub_entry->stub_sec->output_section->vma);
8236
8237 /* Reset the stub type from the plt variant in case we now
8238 can reach with a shorter stub. */
8239 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8240 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8241
8242 size = 4;
8243 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8244 {
8245 off -= 12;
8246 size = 16;
8247 }
8248
8249 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8250 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8251 {
8252 struct ppc_branch_hash_entry *br_entry;
8253
8254 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8255 stub_entry->root.string + 9,
8256 TRUE, FALSE);
8257 if (br_entry == NULL)
8258 {
8259 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8260 stub_entry->root.string + 9);
8261 htab->stub_error = TRUE;
8262 return FALSE;
8263 }
8264
8265 if (br_entry->iter != htab->stub_iteration)
8266 {
8267 br_entry->iter = htab->stub_iteration;
8268 br_entry->offset = htab->brlt->size;
8269 htab->brlt->size += 8;
8270
8271 if (htab->relbrlt != NULL)
8272 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8273 }
8274
8275 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8276 size = 16;
8277 if (stub_entry->stub_type != ppc_stub_plt_branch)
8278 size = 28;
8279 }
8280
8281 if (info->emitrelocations
8282 && (stub_entry->stub_type == ppc_stub_long_branch
8283 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8284 stub_entry->stub_sec->reloc_count += 1;
8285 }
8286
8287 stub_entry->stub_sec->size += size;
8288 return TRUE;
8289 }
8290
8291 /* Set up various things so that we can make a list of input sections
8292 for each output section included in the link. Returns -1 on error,
8293 0 when no stubs will be needed, and 1 on success. */
8294
8295 int
8296 ppc64_elf_setup_section_lists (bfd *output_bfd,
8297 struct bfd_link_info *info,
8298 int no_multi_toc)
8299 {
8300 bfd *input_bfd;
8301 int top_id, top_index, id;
8302 asection *section;
8303 asection **input_list;
8304 bfd_size_type amt;
8305 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8306
8307 htab->no_multi_toc = no_multi_toc;
8308
8309 if (htab->brlt == NULL)
8310 return 0;
8311
8312 /* Find the top input section id. */
8313 for (input_bfd = info->input_bfds, top_id = 3;
8314 input_bfd != NULL;
8315 input_bfd = input_bfd->link_next)
8316 {
8317 for (section = input_bfd->sections;
8318 section != NULL;
8319 section = section->next)
8320 {
8321 if (top_id < section->id)
8322 top_id = section->id;
8323 }
8324 }
8325
8326 htab->top_id = top_id;
8327 amt = sizeof (struct map_stub) * (top_id + 1);
8328 htab->stub_group = bfd_zmalloc (amt);
8329 if (htab->stub_group == NULL)
8330 return -1;
8331
8332 /* Set toc_off for com, und, abs and ind sections. */
8333 for (id = 0; id < 3; id++)
8334 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8335
8336 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8337
8338 /* We can't use output_bfd->section_count here to find the top output
8339 section index as some sections may have been removed, and
8340 strip_excluded_output_sections doesn't renumber the indices. */
8341 for (section = output_bfd->sections, top_index = 0;
8342 section != NULL;
8343 section = section->next)
8344 {
8345 if (top_index < section->index)
8346 top_index = section->index;
8347 }
8348
8349 htab->top_index = top_index;
8350 amt = sizeof (asection *) * (top_index + 1);
8351 input_list = bfd_zmalloc (amt);
8352 htab->input_list = input_list;
8353 if (input_list == NULL)
8354 return -1;
8355
8356 return 1;
8357 }
8358
8359 /* The linker repeatedly calls this function for each TOC input section
8360 and linker generated GOT section. Group input bfds such that the toc
8361 within a group is less than 64k in size. Will break with cute linker
8362 scripts that play games with dot in the output toc section. */
8363
8364 void
8365 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8366 {
8367 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8368
8369 if (!htab->no_multi_toc)
8370 {
8371 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8372 bfd_vma off = addr - htab->toc_curr;
8373
8374 if (off + isec->size > 0x10000)
8375 htab->toc_curr = addr;
8376
8377 elf_gp (isec->owner) = (htab->toc_curr
8378 - elf_gp (isec->output_section->owner)
8379 + TOC_BASE_OFF);
8380 }
8381 }
8382
8383 /* Called after the last call to the above function. */
8384
8385 void
8386 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8387 {
8388 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8389
8390 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8391
8392 /* toc_curr tracks the TOC offset used for code sections below in
8393 ppc64_elf_next_input_section. Start off at 0x8000. */
8394 htab->toc_curr = TOC_BASE_OFF;
8395 }
8396
8397 /* No toc references were found in ISEC. If the code in ISEC makes no
8398 calls, then there's no need to use toc adjusting stubs when branching
8399 into ISEC. Actually, indirect calls from ISEC are OK as they will
8400 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8401 needed, and 2 if a cyclical call-graph was found but no other reason
8402 for a stub was detected. If called from the top level, a return of
8403 2 means the same as a return of 0. */
8404
8405 static int
8406 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8407 {
8408 Elf_Internal_Rela *relstart, *rel;
8409 Elf_Internal_Sym *local_syms;
8410 int ret;
8411 struct ppc_link_hash_table *htab;
8412
8413 /* We know none of our code bearing sections will need toc stubs. */
8414 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8415 return 0;
8416
8417 if (isec->size == 0)
8418 return 0;
8419
8420 if (isec->output_section == NULL)
8421 return 0;
8422
8423 /* Hack for linux kernel. .fixup contains branches, but only back to
8424 the function that hit an exception. */
8425 if (strcmp (isec->name, ".fixup") == 0)
8426 return 0;
8427
8428 if (isec->reloc_count == 0)
8429 return 0;
8430
8431 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8432 info->keep_memory);
8433 if (relstart == NULL)
8434 return -1;
8435
8436 /* Look for branches to outside of this section. */
8437 local_syms = NULL;
8438 ret = 0;
8439 htab = ppc_hash_table (info);
8440 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8441 {
8442 enum elf_ppc64_reloc_type r_type;
8443 unsigned long r_symndx;
8444 struct elf_link_hash_entry *h;
8445 Elf_Internal_Sym *sym;
8446 asection *sym_sec;
8447 long *opd_adjust;
8448 bfd_vma sym_value;
8449 bfd_vma dest;
8450
8451 r_type = ELF64_R_TYPE (rel->r_info);
8452 if (r_type != R_PPC64_REL24
8453 && r_type != R_PPC64_REL14
8454 && r_type != R_PPC64_REL14_BRTAKEN
8455 && r_type != R_PPC64_REL14_BRNTAKEN)
8456 continue;
8457
8458 r_symndx = ELF64_R_SYM (rel->r_info);
8459 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8460 isec->owner))
8461 {
8462 ret = -1;
8463 break;
8464 }
8465
8466 /* Calls to dynamic lib functions go through a plt call stub
8467 that uses r2. Branches to undefined symbols might be a call
8468 using old-style dot symbols that can be satisfied by a plt
8469 call into a new-style dynamic library. */
8470 if (sym_sec == NULL)
8471 {
8472 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8473 if (eh != NULL
8474 && eh->oh != NULL
8475 && eh->oh->elf.plt.plist != NULL)
8476 {
8477 ret = 1;
8478 break;
8479 }
8480
8481 /* Ignore other undefined symbols. */
8482 continue;
8483 }
8484
8485 /* Assume branches to other sections not included in the link need
8486 stubs too, to cover -R and absolute syms. */
8487 if (sym_sec->output_section == NULL)
8488 {
8489 ret = 1;
8490 break;
8491 }
8492
8493 if (h == NULL)
8494 sym_value = sym->st_value;
8495 else
8496 {
8497 if (h->root.type != bfd_link_hash_defined
8498 && h->root.type != bfd_link_hash_defweak)
8499 abort ();
8500 sym_value = h->root.u.def.value;
8501 }
8502 sym_value += rel->r_addend;
8503
8504 /* If this branch reloc uses an opd sym, find the code section. */
8505 opd_adjust = get_opd_info (sym_sec);
8506 if (opd_adjust != NULL)
8507 {
8508 if (h == NULL)
8509 {
8510 long adjust;
8511
8512 adjust = opd_adjust[sym->st_value / 8];
8513 if (adjust == -1)
8514 /* Assume deleted functions won't ever be called. */
8515 continue;
8516 sym_value += adjust;
8517 }
8518
8519 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8520 if (dest == (bfd_vma) -1)
8521 continue;
8522 }
8523 else
8524 dest = (sym_value
8525 + sym_sec->output_offset
8526 + sym_sec->output_section->vma);
8527
8528 /* Ignore branch to self. */
8529 if (sym_sec == isec)
8530 continue;
8531
8532 /* If the called function uses the toc, we need a stub. */
8533 if (sym_sec->has_toc_reloc
8534 || sym_sec->makes_toc_func_call)
8535 {
8536 ret = 1;
8537 break;
8538 }
8539
8540 /* Assume any branch that needs a long branch stub might in fact
8541 need a plt_branch stub. A plt_branch stub uses r2. */
8542 else if (dest - (isec->output_offset
8543 + isec->output_section->vma
8544 + rel->r_offset) + (1 << 25) >= (2 << 25))
8545 {
8546 ret = 1;
8547 break;
8548 }
8549
8550 /* If calling back to a section in the process of being tested, we
8551 can't say for sure that no toc adjusting stubs are needed, so
8552 don't return zero. */
8553 else if (sym_sec->call_check_in_progress)
8554 ret = 2;
8555
8556 /* Branches to another section that itself doesn't have any TOC
8557 references are OK. Recursively call ourselves to check. */
8558 else if (sym_sec->id <= htab->top_id
8559 && htab->stub_group[sym_sec->id].toc_off == 0)
8560 {
8561 int recur;
8562
8563 /* Mark current section as indeterminate, so that other
8564 sections that call back to current won't be marked as
8565 known. */
8566 isec->call_check_in_progress = 1;
8567 recur = toc_adjusting_stub_needed (info, sym_sec);
8568 isec->call_check_in_progress = 0;
8569
8570 if (recur < 0)
8571 {
8572 /* An error. Exit. */
8573 ret = -1;
8574 break;
8575 }
8576 else if (recur <= 1)
8577 {
8578 /* Known result. Mark as checked and set section flag. */
8579 htab->stub_group[sym_sec->id].toc_off = 1;
8580 if (recur != 0)
8581 {
8582 sym_sec->makes_toc_func_call = 1;
8583 ret = 1;
8584 break;
8585 }
8586 }
8587 else
8588 {
8589 /* Unknown result. Continue checking. */
8590 ret = 2;
8591 }
8592 }
8593 }
8594
8595 if (local_syms != NULL
8596 && (elf_tdata (isec->owner)->symtab_hdr.contents
8597 != (unsigned char *) local_syms))
8598 free (local_syms);
8599 if (elf_section_data (isec)->relocs != relstart)
8600 free (relstart);
8601
8602 return ret;
8603 }
8604
8605 /* The linker repeatedly calls this function for each input section,
8606 in the order that input sections are linked into output sections.
8607 Build lists of input sections to determine groupings between which
8608 we may insert linker stubs. */
8609
8610 bfd_boolean
8611 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8612 {
8613 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8614
8615 if ((isec->output_section->flags & SEC_CODE) != 0
8616 && isec->output_section->index <= htab->top_index)
8617 {
8618 asection **list = htab->input_list + isec->output_section->index;
8619 /* Steal the link_sec pointer for our list. */
8620 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8621 /* This happens to make the list in reverse order,
8622 which is what we want. */
8623 PREV_SEC (isec) = *list;
8624 *list = isec;
8625 }
8626
8627 if (htab->multi_toc_needed)
8628 {
8629 /* If a code section has a function that uses the TOC then we need
8630 to use the right TOC (obviously). Also, make sure that .opd gets
8631 the correct TOC value for R_PPC64_TOC relocs that don't have or
8632 can't find their function symbol (shouldn't ever happen now). */
8633 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8634 {
8635 if (elf_gp (isec->owner) != 0)
8636 htab->toc_curr = elf_gp (isec->owner);
8637 }
8638 else if (htab->stub_group[isec->id].toc_off == 0)
8639 {
8640 int ret = toc_adjusting_stub_needed (info, isec);
8641 if (ret < 0)
8642 return FALSE;
8643 else
8644 isec->makes_toc_func_call = ret & 1;
8645 }
8646 }
8647
8648 /* Functions that don't use the TOC can belong in any TOC group.
8649 Use the last TOC base. This happens to make _init and _fini
8650 pasting work. */
8651 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8652 return TRUE;
8653 }
8654
8655 /* See whether we can group stub sections together. Grouping stub
8656 sections may result in fewer stubs. More importantly, we need to
8657 put all .init* and .fini* stubs at the beginning of the .init or
8658 .fini output sections respectively, because glibc splits the
8659 _init and _fini functions into multiple parts. Putting a stub in
8660 the middle of a function is not a good idea. */
8661
8662 static void
8663 group_sections (struct ppc_link_hash_table *htab,
8664 bfd_size_type stub_group_size,
8665 bfd_boolean stubs_always_before_branch)
8666 {
8667 asection **list = htab->input_list + htab->top_index;
8668 do
8669 {
8670 asection *tail = *list;
8671 while (tail != NULL)
8672 {
8673 asection *curr;
8674 asection *prev;
8675 bfd_size_type total;
8676 bfd_boolean big_sec;
8677 bfd_vma curr_toc;
8678
8679 curr = tail;
8680 total = tail->size;
8681 big_sec = total >= stub_group_size;
8682 curr_toc = htab->stub_group[tail->id].toc_off;
8683
8684 while ((prev = PREV_SEC (curr)) != NULL
8685 && ((total += curr->output_offset - prev->output_offset)
8686 < stub_group_size)
8687 && htab->stub_group[prev->id].toc_off == curr_toc)
8688 curr = prev;
8689
8690 /* OK, the size from the start of CURR to the end is less
8691 than stub_group_size and thus can be handled by one stub
8692 section. (or the tail section is itself larger than
8693 stub_group_size, in which case we may be toast.) We
8694 should really be keeping track of the total size of stubs
8695 added here, as stubs contribute to the final output
8696 section size. That's a little tricky, and this way will
8697 only break if stubs added make the total size more than
8698 2^25, ie. for the default stub_group_size, if stubs total
8699 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8700 do
8701 {
8702 prev = PREV_SEC (tail);
8703 /* Set up this stub group. */
8704 htab->stub_group[tail->id].link_sec = curr;
8705 }
8706 while (tail != curr && (tail = prev) != NULL);
8707
8708 /* But wait, there's more! Input sections up to stub_group_size
8709 bytes before the stub section can be handled by it too.
8710 Don't do this if we have a really large section after the
8711 stubs, as adding more stubs increases the chance that
8712 branches may not reach into the stub section. */
8713 if (!stubs_always_before_branch && !big_sec)
8714 {
8715 total = 0;
8716 while (prev != NULL
8717 && ((total += tail->output_offset - prev->output_offset)
8718 < stub_group_size)
8719 && htab->stub_group[prev->id].toc_off == curr_toc)
8720 {
8721 tail = prev;
8722 prev = PREV_SEC (tail);
8723 htab->stub_group[tail->id].link_sec = curr;
8724 }
8725 }
8726 tail = prev;
8727 }
8728 }
8729 while (list-- != htab->input_list);
8730 free (htab->input_list);
8731 #undef PREV_SEC
8732 }
8733
8734 /* Determine and set the size of the stub section for a final link.
8735
8736 The basic idea here is to examine all the relocations looking for
8737 PC-relative calls to a target that is unreachable with a "bl"
8738 instruction. */
8739
8740 bfd_boolean
8741 ppc64_elf_size_stubs (bfd *output_bfd,
8742 struct bfd_link_info *info,
8743 bfd_signed_vma group_size,
8744 asection *(*add_stub_section) (const char *, asection *),
8745 void (*layout_sections_again) (void))
8746 {
8747 bfd_size_type stub_group_size;
8748 bfd_boolean stubs_always_before_branch;
8749 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8750
8751 /* Stash our params away. */
8752 htab->add_stub_section = add_stub_section;
8753 htab->layout_sections_again = layout_sections_again;
8754 stubs_always_before_branch = group_size < 0;
8755 if (group_size < 0)
8756 stub_group_size = -group_size;
8757 else
8758 stub_group_size = group_size;
8759 if (stub_group_size == 1)
8760 {
8761 /* Default values. */
8762 if (stubs_always_before_branch)
8763 {
8764 stub_group_size = 0x1e00000;
8765 if (htab->has_14bit_branch)
8766 stub_group_size = 0x7800;
8767 }
8768 else
8769 {
8770 stub_group_size = 0x1c00000;
8771 if (htab->has_14bit_branch)
8772 stub_group_size = 0x7000;
8773 }
8774 }
8775
8776 group_sections (htab, stub_group_size, stubs_always_before_branch);
8777
8778 while (1)
8779 {
8780 bfd *input_bfd;
8781 unsigned int bfd_indx;
8782 asection *stub_sec;
8783 bfd_boolean stub_changed;
8784
8785 htab->stub_iteration += 1;
8786 stub_changed = FALSE;
8787
8788 for (input_bfd = info->input_bfds, bfd_indx = 0;
8789 input_bfd != NULL;
8790 input_bfd = input_bfd->link_next, bfd_indx++)
8791 {
8792 Elf_Internal_Shdr *symtab_hdr;
8793 asection *section;
8794 Elf_Internal_Sym *local_syms = NULL;
8795
8796 /* We'll need the symbol table in a second. */
8797 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8798 if (symtab_hdr->sh_info == 0)
8799 continue;
8800
8801 /* Walk over each section attached to the input bfd. */
8802 for (section = input_bfd->sections;
8803 section != NULL;
8804 section = section->next)
8805 {
8806 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
8807
8808 /* If there aren't any relocs, then there's nothing more
8809 to do. */
8810 if ((section->flags & SEC_RELOC) == 0
8811 || section->reloc_count == 0)
8812 continue;
8813
8814 /* If this section is a link-once section that will be
8815 discarded, then don't create any stubs. */
8816 if (section->output_section == NULL
8817 || section->output_section->owner != output_bfd)
8818 continue;
8819
8820 /* Get the relocs. */
8821 internal_relocs
8822 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
8823 info->keep_memory);
8824 if (internal_relocs == NULL)
8825 goto error_ret_free_local;
8826
8827 /* Now examine each relocation. */
8828 irela = internal_relocs;
8829 irelaend = irela + section->reloc_count;
8830 for (; irela < irelaend; irela++)
8831 {
8832 enum elf_ppc64_reloc_type r_type;
8833 unsigned int r_indx;
8834 enum ppc_stub_type stub_type;
8835 struct ppc_stub_hash_entry *stub_entry;
8836 asection *sym_sec, *code_sec;
8837 bfd_vma sym_value;
8838 bfd_vma destination;
8839 bfd_boolean ok_dest;
8840 struct ppc_link_hash_entry *hash;
8841 struct ppc_link_hash_entry *fdh;
8842 struct elf_link_hash_entry *h;
8843 Elf_Internal_Sym *sym;
8844 char *stub_name;
8845 const asection *id_sec;
8846 long *opd_adjust;
8847
8848 r_type = ELF64_R_TYPE (irela->r_info);
8849 r_indx = ELF64_R_SYM (irela->r_info);
8850
8851 if (r_type >= R_PPC64_max)
8852 {
8853 bfd_set_error (bfd_error_bad_value);
8854 goto error_ret_free_internal;
8855 }
8856
8857 /* Only look for stubs on branch instructions. */
8858 if (r_type != R_PPC64_REL24
8859 && r_type != R_PPC64_REL14
8860 && r_type != R_PPC64_REL14_BRTAKEN
8861 && r_type != R_PPC64_REL14_BRNTAKEN)
8862 continue;
8863
8864 /* Now determine the call target, its name, value,
8865 section. */
8866 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8867 r_indx, input_bfd))
8868 goto error_ret_free_internal;
8869 hash = (struct ppc_link_hash_entry *) h;
8870
8871 ok_dest = FALSE;
8872 fdh = NULL;
8873 if (hash == NULL)
8874 {
8875 sym_value = sym->st_value;
8876 ok_dest = TRUE;
8877 }
8878 else
8879 {
8880 sym_value = 0;
8881 /* Recognise an old ABI func code entry sym, and
8882 use the func descriptor sym instead. */
8883 if (hash->elf.root.root.string[0] == '.'
8884 && (fdh = get_fdh (hash, htab)) != NULL)
8885 {
8886 if (fdh->elf.root.type == bfd_link_hash_defined
8887 || fdh->elf.root.type == bfd_link_hash_defweak)
8888 {
8889 sym_sec = fdh->elf.root.u.def.section;
8890 sym_value = fdh->elf.root.u.def.value;
8891 if (sym_sec->output_section != NULL)
8892 ok_dest = TRUE;
8893 }
8894 else
8895 fdh = NULL;
8896 }
8897 else if (hash->elf.root.type == bfd_link_hash_defined
8898 || hash->elf.root.type == bfd_link_hash_defweak)
8899 {
8900 sym_value = hash->elf.root.u.def.value;
8901 if (sym_sec->output_section != NULL)
8902 ok_dest = TRUE;
8903 }
8904 else if (hash->elf.root.type == bfd_link_hash_undefweak)
8905 ;
8906 else if (hash->elf.root.type == bfd_link_hash_undefined)
8907 ;
8908 else
8909 {
8910 bfd_set_error (bfd_error_bad_value);
8911 goto error_ret_free_internal;
8912 }
8913 }
8914
8915 destination = 0;
8916 if (ok_dest)
8917 {
8918 sym_value += irela->r_addend;
8919 destination = (sym_value
8920 + sym_sec->output_offset
8921 + sym_sec->output_section->vma);
8922 }
8923
8924 code_sec = sym_sec;
8925 opd_adjust = get_opd_info (sym_sec);
8926 if (opd_adjust != NULL)
8927 {
8928 bfd_vma dest;
8929
8930 if (hash == NULL)
8931 {
8932 long adjust = opd_adjust[sym_value / 8];
8933 if (adjust == -1)
8934 continue;
8935 sym_value += adjust;
8936 }
8937 dest = opd_entry_value (sym_sec, sym_value,
8938 &code_sec, &sym_value);
8939 if (dest != (bfd_vma) -1)
8940 {
8941 destination = dest;
8942 if (fdh != NULL)
8943 {
8944 /* Fixup old ABI sym to point at code
8945 entry. */
8946 hash->elf.root.type = bfd_link_hash_defweak;
8947 hash->elf.root.u.def.section = code_sec;
8948 hash->elf.root.u.def.value = sym_value;
8949 }
8950 }
8951 }
8952
8953 /* Determine what (if any) linker stub is needed. */
8954 stub_type = ppc_type_of_stub (section, irela, &hash,
8955 destination);
8956
8957 if (stub_type != ppc_stub_plt_call)
8958 {
8959 /* Check whether we need a TOC adjusting stub.
8960 Since the linker pastes together pieces from
8961 different object files when creating the
8962 _init and _fini functions, it may be that a
8963 call to what looks like a local sym is in
8964 fact a call needing a TOC adjustment. */
8965 if (code_sec != NULL
8966 && code_sec->output_section != NULL
8967 && (htab->stub_group[code_sec->id].toc_off
8968 != htab->stub_group[section->id].toc_off)
8969 && (code_sec->has_toc_reloc
8970 || code_sec->makes_toc_func_call))
8971 stub_type = ppc_stub_long_branch_r2off;
8972 }
8973
8974 if (stub_type == ppc_stub_none)
8975 continue;
8976
8977 /* __tls_get_addr calls might be eliminated. */
8978 if (stub_type != ppc_stub_plt_call
8979 && hash != NULL
8980 && (hash == htab->tls_get_addr
8981 || hash == htab->tls_get_addr_fd)
8982 && section->has_tls_reloc
8983 && irela != internal_relocs)
8984 {
8985 /* Get tls info. */
8986 char *tls_mask;
8987
8988 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
8989 irela - 1, input_bfd))
8990 goto error_ret_free_internal;
8991 if (*tls_mask != 0)
8992 continue;
8993 }
8994
8995 /* Support for grouping stub sections. */
8996 id_sec = htab->stub_group[section->id].link_sec;
8997
8998 /* Get the name of this stub. */
8999 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9000 if (!stub_name)
9001 goto error_ret_free_internal;
9002
9003 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9004 stub_name, FALSE, FALSE);
9005 if (stub_entry != NULL)
9006 {
9007 /* The proper stub has already been created. */
9008 free (stub_name);
9009 continue;
9010 }
9011
9012 stub_entry = ppc_add_stub (stub_name, section, htab);
9013 if (stub_entry == NULL)
9014 {
9015 free (stub_name);
9016 error_ret_free_internal:
9017 if (elf_section_data (section)->relocs == NULL)
9018 free (internal_relocs);
9019 error_ret_free_local:
9020 if (local_syms != NULL
9021 && (symtab_hdr->contents
9022 != (unsigned char *) local_syms))
9023 free (local_syms);
9024 return FALSE;
9025 }
9026
9027 stub_entry->stub_type = stub_type;
9028 stub_entry->target_value = sym_value;
9029 stub_entry->target_section = code_sec;
9030 stub_entry->h = hash;
9031 stub_entry->addend = irela->r_addend;
9032
9033 if (stub_entry->h != NULL)
9034 htab->stub_globals += 1;
9035
9036 stub_changed = TRUE;
9037 }
9038
9039 /* We're done with the internal relocs, free them. */
9040 if (elf_section_data (section)->relocs != internal_relocs)
9041 free (internal_relocs);
9042 }
9043
9044 if (local_syms != NULL
9045 && symtab_hdr->contents != (unsigned char *) local_syms)
9046 {
9047 if (!info->keep_memory)
9048 free (local_syms);
9049 else
9050 symtab_hdr->contents = (unsigned char *) local_syms;
9051 }
9052 }
9053
9054 if (!stub_changed)
9055 break;
9056
9057 /* OK, we've added some stubs. Find out the new size of the
9058 stub sections. */
9059 for (stub_sec = htab->stub_bfd->sections;
9060 stub_sec != NULL;
9061 stub_sec = stub_sec->next)
9062 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9063 {
9064 stub_sec->size = 0;
9065 stub_sec->reloc_count = 0;
9066 }
9067
9068 htab->brlt->size = 0;
9069 if (htab->relbrlt != NULL)
9070 htab->relbrlt->size = 0;
9071
9072 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9073
9074 /* Ask the linker to do its stuff. */
9075 (*htab->layout_sections_again) ();
9076 }
9077
9078 /* It would be nice to strip .branch_lt from the output if the
9079 section is empty, but it's too late. If we strip sections here,
9080 the dynamic symbol table is corrupted since the section symbol
9081 for the stripped section isn't written. */
9082
9083 return TRUE;
9084 }
9085
9086 /* Called after we have determined section placement. If sections
9087 move, we'll be called again. Provide a value for TOCstart. */
9088
9089 bfd_vma
9090 ppc64_elf_toc (bfd *obfd)
9091 {
9092 asection *s;
9093 bfd_vma TOCstart;
9094
9095 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9096 order. The TOC starts where the first of these sections starts. */
9097 s = bfd_get_section_by_name (obfd, ".got");
9098 if (s == NULL)
9099 s = bfd_get_section_by_name (obfd, ".toc");
9100 if (s == NULL)
9101 s = bfd_get_section_by_name (obfd, ".tocbss");
9102 if (s == NULL)
9103 s = bfd_get_section_by_name (obfd, ".plt");
9104 if (s == NULL)
9105 {
9106 /* This may happen for
9107 o references to TOC base (SYM@toc / TOC[tc0]) without a
9108 .toc directive
9109 o bad linker script
9110 o --gc-sections and empty TOC sections
9111
9112 FIXME: Warn user? */
9113
9114 /* Look for a likely section. We probably won't even be
9115 using TOCstart. */
9116 for (s = obfd->sections; s != NULL; s = s->next)
9117 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9118 == (SEC_ALLOC | SEC_SMALL_DATA))
9119 break;
9120 if (s == NULL)
9121 for (s = obfd->sections; s != NULL; s = s->next)
9122 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9123 == (SEC_ALLOC | SEC_SMALL_DATA))
9124 break;
9125 if (s == NULL)
9126 for (s = obfd->sections; s != NULL; s = s->next)
9127 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9128 break;
9129 if (s == NULL)
9130 for (s = obfd->sections; s != NULL; s = s->next)
9131 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9132 break;
9133 }
9134
9135 TOCstart = 0;
9136 if (s != NULL)
9137 TOCstart = s->output_section->vma + s->output_offset;
9138
9139 return TOCstart;
9140 }
9141
9142 /* Build all the stubs associated with the current output file.
9143 The stubs are kept in a hash table attached to the main linker
9144 hash table. This function is called via gldelf64ppc_finish. */
9145
9146 bfd_boolean
9147 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9148 struct bfd_link_info *info,
9149 char **stats)
9150 {
9151 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9152 asection *stub_sec;
9153 bfd_byte *p;
9154 int stub_sec_count = 0;
9155
9156 htab->emit_stub_syms = emit_stub_syms;
9157
9158 /* Allocate memory to hold the linker stubs. */
9159 for (stub_sec = htab->stub_bfd->sections;
9160 stub_sec != NULL;
9161 stub_sec = stub_sec->next)
9162 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9163 && stub_sec->size != 0)
9164 {
9165 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9166 if (stub_sec->contents == NULL)
9167 return FALSE;
9168 /* We want to check that built size is the same as calculated
9169 size. rawsize is a convenient location to use. */
9170 stub_sec->rawsize = stub_sec->size;
9171 stub_sec->size = 0;
9172 }
9173
9174 if (htab->plt != NULL)
9175 {
9176 unsigned int indx;
9177 bfd_vma plt0;
9178
9179 /* Build the .glink plt call stub. */
9180 plt0 = (htab->plt->output_section->vma
9181 + htab->plt->output_offset
9182 - (htab->glink->output_section->vma
9183 + htab->glink->output_offset
9184 + GLINK_CALL_STUB_SIZE));
9185 if (plt0 + 0x80008000 > 0xffffffff)
9186 {
9187 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9188 bfd_set_error (bfd_error_bad_value);
9189 return FALSE;
9190 }
9191
9192 if (htab->emit_stub_syms)
9193 {
9194 struct elf_link_hash_entry *h;
9195 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9196 if (h == NULL)
9197 return FALSE;
9198 if (h->root.type == bfd_link_hash_new)
9199 {
9200 h->root.type = bfd_link_hash_defined;
9201 h->root.u.def.section = htab->glink;
9202 h->root.u.def.value = 0;
9203 h->ref_regular = 1;
9204 h->def_regular = 1;
9205 h->ref_regular_nonweak = 1;
9206 h->forced_local = 1;
9207 h->non_elf = 0;
9208 }
9209 }
9210 p = htab->glink->contents;
9211 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9212 p += 4;
9213 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9214 p += 4;
9215 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9216 p += 4;
9217 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9218 p += 4;
9219 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9220 p += 4;
9221 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9222 p += 4;
9223 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9224 p += 4;
9225 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9226 p += 4;
9227 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9228 p += 4;
9229 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9230 p += 4;
9231 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9232 p += 4;
9233 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9234 p += 4;
9235 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9236 p += 4;
9237 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9238 p += 4;
9239 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9240 p += 4;
9241 bfd_put_32 (htab->glink->owner, BCTR, p);
9242 p += 4;
9243
9244 /* Build the .glink lazy link call stubs. */
9245 indx = 0;
9246 while (p < htab->glink->contents + htab->glink->size)
9247 {
9248 if (indx < 0x8000)
9249 {
9250 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9251 p += 4;
9252 }
9253 else
9254 {
9255 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9256 p += 4;
9257 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9258 p += 4;
9259 }
9260 bfd_put_32 (htab->glink->owner,
9261 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9262 indx++;
9263 p += 4;
9264 }
9265 htab->glink->rawsize = p - htab->glink->contents;
9266 }
9267
9268 if (htab->brlt->size != 0)
9269 {
9270 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9271 htab->brlt->size);
9272 if (htab->brlt->contents == NULL)
9273 return FALSE;
9274 }
9275 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9276 {
9277 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9278 htab->relbrlt->size);
9279 if (htab->relbrlt->contents == NULL)
9280 return FALSE;
9281 }
9282
9283 /* Build the stubs as directed by the stub hash table. */
9284 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9285
9286 for (stub_sec = htab->stub_bfd->sections;
9287 stub_sec != NULL;
9288 stub_sec = stub_sec->next)
9289 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9290 {
9291 stub_sec_count += 1;
9292 if (stub_sec->rawsize != stub_sec->size)
9293 break;
9294 }
9295
9296 if (stub_sec != NULL
9297 || htab->glink->rawsize != htab->glink->size)
9298 {
9299 htab->stub_error = TRUE;
9300 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9301 }
9302
9303 if (htab->stub_error)
9304 return FALSE;
9305
9306 if (stats != NULL)
9307 {
9308 *stats = bfd_malloc (500);
9309 if (*stats == NULL)
9310 return FALSE;
9311
9312 sprintf (*stats, _("linker stubs in %u group%s\n"
9313 " branch %lu\n"
9314 " toc adjust %lu\n"
9315 " long branch %lu\n"
9316 " long toc adj %lu\n"
9317 " plt call %lu"),
9318 stub_sec_count,
9319 stub_sec_count == 1 ? "" : "s",
9320 htab->stub_count[ppc_stub_long_branch - 1],
9321 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9322 htab->stub_count[ppc_stub_plt_branch - 1],
9323 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9324 htab->stub_count[ppc_stub_plt_call - 1]);
9325 }
9326 return TRUE;
9327 }
9328
9329 /* This function undoes the changes made by add_symbol_adjust. */
9330
9331 static bfd_boolean
9332 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9333 {
9334 struct ppc_link_hash_entry *eh;
9335
9336 if (h->root.type == bfd_link_hash_indirect)
9337 return TRUE;
9338
9339 if (h->root.type == bfd_link_hash_warning)
9340 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9341
9342 eh = (struct ppc_link_hash_entry *) h;
9343 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9344 return TRUE;
9345
9346 eh->elf.root.type = bfd_link_hash_undefined;
9347 return TRUE;
9348 }
9349
9350 void
9351 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9352 {
9353 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9354 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9355 }
9356
9357 /* The RELOCATE_SECTION function is called by the ELF backend linker
9358 to handle the relocations for a section.
9359
9360 The relocs are always passed as Rela structures; if the section
9361 actually uses Rel structures, the r_addend field will always be
9362 zero.
9363
9364 This function is responsible for adjust the section contents as
9365 necessary, and (if using Rela relocs and generating a
9366 relocatable output file) adjusting the reloc addend as
9367 necessary.
9368
9369 This function does not have to worry about setting the reloc
9370 address or the reloc symbol index.
9371
9372 LOCAL_SYMS is a pointer to the swapped in local symbols.
9373
9374 LOCAL_SECTIONS is an array giving the section in the input file
9375 corresponding to the st_shndx field of each local symbol.
9376
9377 The global hash table entry for the global symbols can be found
9378 via elf_sym_hashes (input_bfd).
9379
9380 When generating relocatable output, this function must handle
9381 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9382 going to be the section symbol corresponding to the output
9383 section, which means that the addend must be adjusted
9384 accordingly. */
9385
9386 static bfd_boolean
9387 ppc64_elf_relocate_section (bfd *output_bfd,
9388 struct bfd_link_info *info,
9389 bfd *input_bfd,
9390 asection *input_section,
9391 bfd_byte *contents,
9392 Elf_Internal_Rela *relocs,
9393 Elf_Internal_Sym *local_syms,
9394 asection **local_sections)
9395 {
9396 struct ppc_link_hash_table *htab;
9397 Elf_Internal_Shdr *symtab_hdr;
9398 struct elf_link_hash_entry **sym_hashes;
9399 Elf_Internal_Rela *rel;
9400 Elf_Internal_Rela *relend;
9401 Elf_Internal_Rela outrel;
9402 bfd_byte *loc;
9403 struct got_entry **local_got_ents;
9404 bfd_vma TOCstart;
9405 bfd_boolean ret = TRUE;
9406 bfd_boolean is_opd;
9407 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9408 bfd_boolean is_power4 = FALSE;
9409
9410 if (info->relocatable)
9411 return TRUE;
9412
9413 /* Initialize howto table if needed. */
9414 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9415 ppc_howto_init ();
9416
9417 htab = ppc_hash_table (info);
9418
9419 /* Don't relocate stub sections. */
9420 if (input_section->owner == htab->stub_bfd)
9421 return TRUE;
9422
9423 local_got_ents = elf_local_got_ents (input_bfd);
9424 TOCstart = elf_gp (output_bfd);
9425 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9426 sym_hashes = elf_sym_hashes (input_bfd);
9427 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9428
9429 rel = relocs;
9430 relend = relocs + input_section->reloc_count;
9431 for (; rel < relend; rel++)
9432 {
9433 enum elf_ppc64_reloc_type r_type;
9434 bfd_vma addend;
9435 bfd_reloc_status_type r;
9436 Elf_Internal_Sym *sym;
9437 asection *sec;
9438 struct elf_link_hash_entry *h_elf;
9439 struct ppc_link_hash_entry *h;
9440 struct ppc_link_hash_entry *fdh;
9441 const char *sym_name;
9442 unsigned long r_symndx, toc_symndx;
9443 char tls_mask, tls_gd, tls_type;
9444 char sym_type;
9445 bfd_vma relocation;
9446 bfd_boolean unresolved_reloc;
9447 bfd_boolean warned;
9448 unsigned long insn, mask;
9449 struct ppc_stub_hash_entry *stub_entry;
9450 bfd_vma max_br_offset;
9451 bfd_vma from;
9452
9453 r_type = ELF64_R_TYPE (rel->r_info);
9454 r_symndx = ELF64_R_SYM (rel->r_info);
9455
9456 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9457 symbol of the previous ADDR64 reloc. The symbol gives us the
9458 proper TOC base to use. */
9459 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9460 && rel != relocs
9461 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9462 && is_opd)
9463 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9464
9465 sym = NULL;
9466 sec = NULL;
9467 h_elf = NULL;
9468 sym_name = NULL;
9469 unresolved_reloc = FALSE;
9470 warned = FALSE;
9471
9472 if (r_symndx < symtab_hdr->sh_info)
9473 {
9474 /* It's a local symbol. */
9475 long *opd_adjust;
9476
9477 sym = local_syms + r_symndx;
9478 sec = local_sections[r_symndx];
9479 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9480 sym_type = ELF64_ST_TYPE (sym->st_info);
9481 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9482 opd_adjust = get_opd_info (sec);
9483 if (opd_adjust != NULL)
9484 {
9485 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9486 if (adjust == -1)
9487 relocation = 0;
9488 else
9489 relocation += adjust;
9490 }
9491 }
9492 else
9493 {
9494 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9495 r_symndx, symtab_hdr, sym_hashes,
9496 h_elf, sec, relocation,
9497 unresolved_reloc, warned);
9498 sym_name = h_elf->root.root.string;
9499 sym_type = h_elf->type;
9500 }
9501 h = (struct ppc_link_hash_entry *) h_elf;
9502
9503 /* TLS optimizations. Replace instruction sequences and relocs
9504 based on information we collected in tls_optimize. We edit
9505 RELOCS so that --emit-relocs will output something sensible
9506 for the final instruction stream. */
9507 tls_mask = 0;
9508 tls_gd = 0;
9509 toc_symndx = 0;
9510 if (IS_PPC64_TLS_RELOC (r_type))
9511 {
9512 if (h != NULL)
9513 tls_mask = h->tls_mask;
9514 else if (local_got_ents != NULL)
9515 {
9516 char *lgot_masks;
9517 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9518 tls_mask = lgot_masks[r_symndx];
9519 }
9520 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9521 {
9522 /* Check for toc tls entries. */
9523 char *toc_tls;
9524
9525 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9526 rel, input_bfd))
9527 return FALSE;
9528
9529 if (toc_tls)
9530 tls_mask = *toc_tls;
9531 }
9532 }
9533
9534 /* Check that tls relocs are used with tls syms, and non-tls
9535 relocs are used with non-tls syms. */
9536 if (r_symndx != 0
9537 && r_type != R_PPC64_NONE
9538 && (h == NULL
9539 || h->elf.root.type == bfd_link_hash_defined
9540 || h->elf.root.type == bfd_link_hash_defweak)
9541 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9542 {
9543 if (r_type == R_PPC64_TLS && tls_mask != 0)
9544 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9545 ;
9546 else
9547 (*_bfd_error_handler)
9548 (sym_type == STT_TLS
9549 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9550 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9551 input_bfd,
9552 input_section,
9553 (long) rel->r_offset,
9554 ppc64_elf_howto_table[r_type]->name,
9555 sym_name);
9556 }
9557
9558 /* Ensure reloc mapping code below stays sane. */
9559 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9560 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9561 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9562 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9563 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9564 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9565 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9566 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9567 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9568 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9569 abort ();
9570
9571 switch (r_type)
9572 {
9573 default:
9574 break;
9575
9576 case R_PPC64_TOC16:
9577 case R_PPC64_TOC16_LO:
9578 case R_PPC64_TOC16_DS:
9579 case R_PPC64_TOC16_LO_DS:
9580 {
9581 /* Check for toc tls entries. */
9582 char *toc_tls;
9583 int retval;
9584
9585 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9586 rel, input_bfd);
9587 if (retval == 0)
9588 return FALSE;
9589
9590 if (toc_tls)
9591 {
9592 tls_mask = *toc_tls;
9593 if (r_type == R_PPC64_TOC16_DS
9594 || r_type == R_PPC64_TOC16_LO_DS)
9595 {
9596 if (tls_mask != 0
9597 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9598 goto toctprel;
9599 }
9600 else
9601 {
9602 /* If we found a GD reloc pair, then we might be
9603 doing a GD->IE transition. */
9604 if (retval == 2)
9605 {
9606 tls_gd = TLS_TPRELGD;
9607 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9608 goto tls_get_addr_check;
9609 }
9610 else if (retval == 3)
9611 {
9612 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9613 goto tls_get_addr_check;
9614 }
9615 }
9616 }
9617 }
9618 break;
9619
9620 case R_PPC64_GOT_TPREL16_DS:
9621 case R_PPC64_GOT_TPREL16_LO_DS:
9622 if (tls_mask != 0
9623 && (tls_mask & TLS_TPREL) == 0)
9624 {
9625 toctprel:
9626 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9627 insn &= 31 << 21;
9628 insn |= 0x3c0d0000; /* addis 0,13,0 */
9629 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9630 r_type = R_PPC64_TPREL16_HA;
9631 if (toc_symndx != 0)
9632 {
9633 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9634 /* We changed the symbol. Start over in order to
9635 get h, sym, sec etc. right. */
9636 rel--;
9637 continue;
9638 }
9639 else
9640 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9641 }
9642 break;
9643
9644 case R_PPC64_TLS:
9645 if (tls_mask != 0
9646 && (tls_mask & TLS_TPREL) == 0)
9647 {
9648 bfd_vma rtra;
9649 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9650 if ((insn & ((0x3f << 26) | (31 << 11)))
9651 == ((31 << 26) | (13 << 11)))
9652 rtra = insn & ((1 << 26) - (1 << 16));
9653 else if ((insn & ((0x3f << 26) | (31 << 16)))
9654 == ((31 << 26) | (13 << 16)))
9655 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9656 else
9657 abort ();
9658 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9659 /* add -> addi. */
9660 insn = 14 << 26;
9661 else if ((insn & (31 << 1)) == 23 << 1
9662 && ((insn & (31 << 6)) < 14 << 6
9663 || ((insn & (31 << 6)) >= 16 << 6
9664 && (insn & (31 << 6)) < 24 << 6)))
9665 /* load and store indexed -> dform. */
9666 insn = (32 | ((insn >> 6) & 31)) << 26;
9667 else if ((insn & (31 << 1)) == 21 << 1
9668 && (insn & (0x1a << 6)) == 0)
9669 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9670 insn = (((58 | ((insn >> 6) & 4)) << 26)
9671 | ((insn >> 6) & 1));
9672 else if ((insn & (31 << 1)) == 21 << 1
9673 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9674 /* lwax -> lwa. */
9675 insn = (58 << 26) | 2;
9676 else
9677 abort ();
9678 insn |= rtra;
9679 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9680 /* Was PPC64_TLS which sits on insn boundary, now
9681 PPC64_TPREL16_LO which is at insn+2. */
9682 rel->r_offset += 2;
9683 r_type = R_PPC64_TPREL16_LO;
9684 if (toc_symndx != 0)
9685 {
9686 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9687 /* We changed the symbol. Start over in order to
9688 get h, sym, sec etc. right. */
9689 rel--;
9690 continue;
9691 }
9692 else
9693 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9694 }
9695 break;
9696
9697 case R_PPC64_GOT_TLSGD16_HI:
9698 case R_PPC64_GOT_TLSGD16_HA:
9699 tls_gd = TLS_TPRELGD;
9700 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9701 goto tls_gdld_hi;
9702 break;
9703
9704 case R_PPC64_GOT_TLSLD16_HI:
9705 case R_PPC64_GOT_TLSLD16_HA:
9706 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9707 {
9708 tls_gdld_hi:
9709 if ((tls_mask & tls_gd) != 0)
9710 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9711 + R_PPC64_GOT_TPREL16_DS);
9712 else
9713 {
9714 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
9715 rel->r_offset -= 2;
9716 r_type = R_PPC64_NONE;
9717 }
9718 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9719 }
9720 break;
9721
9722 case R_PPC64_GOT_TLSGD16:
9723 case R_PPC64_GOT_TLSGD16_LO:
9724 tls_gd = TLS_TPRELGD;
9725 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9726 goto tls_get_addr_check;
9727 break;
9728
9729 case R_PPC64_GOT_TLSLD16:
9730 case R_PPC64_GOT_TLSLD16_LO:
9731 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9732 {
9733 tls_get_addr_check:
9734 if (rel + 1 < relend)
9735 {
9736 enum elf_ppc64_reloc_type r_type2;
9737 unsigned long r_symndx2;
9738 struct elf_link_hash_entry *h2;
9739 bfd_vma insn1, insn2, insn3;
9740 bfd_vma offset;
9741
9742 /* The next instruction should be a call to
9743 __tls_get_addr. Peek at the reloc to be sure. */
9744 r_type2 = ELF64_R_TYPE (rel[1].r_info);
9745 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
9746 if (r_symndx2 < symtab_hdr->sh_info
9747 || (r_type2 != R_PPC64_REL14
9748 && r_type2 != R_PPC64_REL14_BRTAKEN
9749 && r_type2 != R_PPC64_REL14_BRNTAKEN
9750 && r_type2 != R_PPC64_REL24))
9751 break;
9752
9753 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
9754 while (h2->root.type == bfd_link_hash_indirect
9755 || h2->root.type == bfd_link_hash_warning)
9756 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
9757 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
9758 && h2 != &htab->tls_get_addr_fd->elf))
9759 break;
9760
9761 /* OK, it checks out. Replace the call. */
9762 offset = rel[1].r_offset;
9763 insn1 = bfd_get_32 (output_bfd,
9764 contents + rel->r_offset - 2);
9765 insn3 = bfd_get_32 (output_bfd,
9766 contents + offset + 4);
9767 if ((tls_mask & tls_gd) != 0)
9768 {
9769 /* IE */
9770 insn1 &= (1 << 26) - (1 << 2);
9771 insn1 |= 58 << 26; /* ld */
9772 insn2 = 0x7c636a14; /* add 3,3,13 */
9773 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
9774 if ((tls_mask & TLS_EXPLICIT) == 0)
9775 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
9776 + R_PPC64_GOT_TPREL16_DS);
9777 else
9778 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
9779 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9780 }
9781 else
9782 {
9783 /* LE */
9784 insn1 = 0x3c6d0000; /* addis 3,13,0 */
9785 insn2 = 0x38630000; /* addi 3,3,0 */
9786 if (tls_gd == 0)
9787 {
9788 /* Was an LD reloc. */
9789 r_symndx = 0;
9790 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9791 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
9792 }
9793 else if (toc_symndx != 0)
9794 r_symndx = toc_symndx;
9795 r_type = R_PPC64_TPREL16_HA;
9796 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9797 rel[1].r_info = ELF64_R_INFO (r_symndx,
9798 R_PPC64_TPREL16_LO);
9799 rel[1].r_offset += 2;
9800 }
9801 if (insn3 == NOP
9802 || insn3 == CROR_151515 || insn3 == CROR_313131)
9803 {
9804 insn3 = insn2;
9805 insn2 = NOP;
9806 rel[1].r_offset += 4;
9807 }
9808 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
9809 bfd_put_32 (output_bfd, insn2, contents + offset);
9810 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
9811 if (tls_gd == 0 || toc_symndx != 0)
9812 {
9813 /* We changed the symbol. Start over in order
9814 to get h, sym, sec etc. right. */
9815 rel--;
9816 continue;
9817 }
9818 }
9819 }
9820 break;
9821
9822 case R_PPC64_DTPMOD64:
9823 if (rel + 1 < relend
9824 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
9825 && rel[1].r_offset == rel->r_offset + 8)
9826 {
9827 if ((tls_mask & TLS_GD) == 0)
9828 {
9829 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
9830 if ((tls_mask & TLS_TPRELGD) != 0)
9831 r_type = R_PPC64_TPREL64;
9832 else
9833 {
9834 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9835 r_type = R_PPC64_NONE;
9836 }
9837 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9838 }
9839 }
9840 else
9841 {
9842 if ((tls_mask & TLS_LD) == 0)
9843 {
9844 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
9845 r_type = R_PPC64_NONE;
9846 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9847 }
9848 }
9849 break;
9850
9851 case R_PPC64_TPREL64:
9852 if ((tls_mask & TLS_TPREL) == 0)
9853 {
9854 r_type = R_PPC64_NONE;
9855 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9856 }
9857 break;
9858 }
9859
9860 /* Handle other relocations that tweak non-addend part of insn. */
9861 insn = 0;
9862 max_br_offset = 1 << 25;
9863 addend = rel->r_addend;
9864 switch (r_type)
9865 {
9866 default:
9867 break;
9868
9869 /* Branch taken prediction relocations. */
9870 case R_PPC64_ADDR14_BRTAKEN:
9871 case R_PPC64_REL14_BRTAKEN:
9872 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
9873 /* Fall thru. */
9874
9875 /* Branch not taken prediction relocations. */
9876 case R_PPC64_ADDR14_BRNTAKEN:
9877 case R_PPC64_REL14_BRNTAKEN:
9878 insn |= bfd_get_32 (output_bfd,
9879 contents + rel->r_offset) & ~(0x01 << 21);
9880 /* Fall thru. */
9881
9882 case R_PPC64_REL14:
9883 max_br_offset = 1 << 15;
9884 /* Fall thru. */
9885
9886 case R_PPC64_REL24:
9887 /* Calls to functions with a different TOC, such as calls to
9888 shared objects, need to alter the TOC pointer. This is
9889 done using a linkage stub. A REL24 branching to these
9890 linkage stubs needs to be followed by a nop, as the nop
9891 will be replaced with an instruction to restore the TOC
9892 base pointer. */
9893 stub_entry = NULL;
9894 fdh = h;
9895 if (((h != NULL
9896 && (((fdh = h->oh) != NULL
9897 && fdh->elf.plt.plist != NULL)
9898 || (fdh = h)->elf.plt.plist != NULL))
9899 || (sec != NULL
9900 && sec->output_section != NULL
9901 && sec->id <= htab->top_id
9902 && (htab->stub_group[sec->id].toc_off
9903 != htab->stub_group[input_section->id].toc_off)))
9904 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
9905 rel, htab)) != NULL
9906 && (stub_entry->stub_type == ppc_stub_plt_call
9907 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
9908 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
9909 {
9910 bfd_boolean can_plt_call = FALSE;
9911
9912 if (rel->r_offset + 8 <= input_section->size)
9913 {
9914 unsigned long nop;
9915 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
9916 if (nop == NOP
9917 || nop == CROR_151515 || nop == CROR_313131)
9918 {
9919 bfd_put_32 (input_bfd, LD_R2_40R1,
9920 contents + rel->r_offset + 4);
9921 can_plt_call = TRUE;
9922 }
9923 }
9924
9925 if (!can_plt_call)
9926 {
9927 if (stub_entry->stub_type == ppc_stub_plt_call)
9928 {
9929 /* If this is a plain branch rather than a branch
9930 and link, don't require a nop. */
9931 unsigned long br;
9932 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
9933 if ((br & 1) == 0)
9934 can_plt_call = TRUE;
9935 }
9936 else if (h != NULL
9937 && strcmp (h->elf.root.root.string,
9938 ".__libc_start_main") == 0)
9939 {
9940 /* Allow crt1 branch to go via a toc adjusting stub. */
9941 can_plt_call = TRUE;
9942 }
9943 else
9944 {
9945 if (strcmp (input_section->output_section->name,
9946 ".init") == 0
9947 || strcmp (input_section->output_section->name,
9948 ".fini") == 0)
9949 (*_bfd_error_handler)
9950 (_("%B(%A+0x%lx): automatic multiple TOCs "
9951 "not supported using your crt files; "
9952 "recompile with -mminimal-toc or upgrade gcc"),
9953 input_bfd,
9954 input_section,
9955 (long) rel->r_offset);
9956 else
9957 (*_bfd_error_handler)
9958 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
9959 "does not allow automatic multiple TOCs; "
9960 "recompile with -mminimal-toc or "
9961 "-fno-optimize-sibling-calls, "
9962 "or make `%s' extern"),
9963 input_bfd,
9964 input_section,
9965 (long) rel->r_offset,
9966 sym_name,
9967 sym_name);
9968 bfd_set_error (bfd_error_bad_value);
9969 ret = FALSE;
9970 }
9971 }
9972
9973 if (can_plt_call
9974 && stub_entry->stub_type == ppc_stub_plt_call)
9975 unresolved_reloc = FALSE;
9976 }
9977
9978 if (stub_entry == NULL
9979 && get_opd_info (sec) != NULL)
9980 {
9981 /* The branch destination is the value of the opd entry. */
9982 bfd_vma off = (relocation - sec->output_section->vma
9983 - sec->output_offset + rel->r_addend);
9984 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
9985 if (dest != (bfd_vma) -1)
9986 {
9987 relocation = dest;
9988 addend = 0;
9989 }
9990 }
9991
9992 /* If the branch is out of reach we ought to have a long
9993 branch stub. */
9994 from = (rel->r_offset
9995 + input_section->output_offset
9996 + input_section->output_section->vma);
9997
9998 if (stub_entry == NULL
9999 && (relocation + rel->r_addend - from + max_br_offset
10000 >= 2 * max_br_offset)
10001 && r_type != R_PPC64_ADDR14_BRTAKEN
10002 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10003 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10004 htab);
10005
10006 if (stub_entry != NULL)
10007 {
10008 /* Munge up the value and addend so that we call the stub
10009 rather than the procedure directly. */
10010 relocation = (stub_entry->stub_offset
10011 + stub_entry->stub_sec->output_offset
10012 + stub_entry->stub_sec->output_section->vma);
10013 addend = 0;
10014 }
10015
10016 if (insn != 0)
10017 {
10018 if (is_power4)
10019 {
10020 /* Set 'a' bit. This is 0b00010 in BO field for branch
10021 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10022 for branch on CTR insns (BO == 1a00t or 1a01t). */
10023 if ((insn & (0x14 << 21)) == (0x04 << 21))
10024 insn |= 0x02 << 21;
10025 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10026 insn |= 0x08 << 21;
10027 else
10028 break;
10029 }
10030 else
10031 {
10032 /* Invert 'y' bit if not the default. */
10033 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
10034 insn ^= 0x01 << 21;
10035 }
10036
10037 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10038 }
10039
10040 /* NOP out calls to undefined weak functions.
10041 We can thus call a weak function without first
10042 checking whether the function is defined. */
10043 else if (h != NULL
10044 && h->elf.root.type == bfd_link_hash_undefweak
10045 && r_type == R_PPC64_REL24
10046 && relocation == 0
10047 && rel->r_addend == 0)
10048 {
10049 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10050 continue;
10051 }
10052 break;
10053 }
10054
10055 /* Set `addend'. */
10056 tls_type = 0;
10057 switch (r_type)
10058 {
10059 default:
10060 (*_bfd_error_handler)
10061 (_("%B: unknown relocation type %d for symbol %s"),
10062 input_bfd, (int) r_type, sym_name);
10063
10064 bfd_set_error (bfd_error_bad_value);
10065 ret = FALSE;
10066 continue;
10067
10068 case R_PPC64_NONE:
10069 case R_PPC64_TLS:
10070 case R_PPC64_GNU_VTINHERIT:
10071 case R_PPC64_GNU_VTENTRY:
10072 continue;
10073
10074 /* GOT16 relocations. Like an ADDR16 using the symbol's
10075 address in the GOT as relocation value instead of the
10076 symbol's value itself. Also, create a GOT entry for the
10077 symbol and put the symbol value there. */
10078 case R_PPC64_GOT_TLSGD16:
10079 case R_PPC64_GOT_TLSGD16_LO:
10080 case R_PPC64_GOT_TLSGD16_HI:
10081 case R_PPC64_GOT_TLSGD16_HA:
10082 tls_type = TLS_TLS | TLS_GD;
10083 goto dogot;
10084
10085 case R_PPC64_GOT_TLSLD16:
10086 case R_PPC64_GOT_TLSLD16_LO:
10087 case R_PPC64_GOT_TLSLD16_HI:
10088 case R_PPC64_GOT_TLSLD16_HA:
10089 tls_type = TLS_TLS | TLS_LD;
10090 goto dogot;
10091
10092 case R_PPC64_GOT_TPREL16_DS:
10093 case R_PPC64_GOT_TPREL16_LO_DS:
10094 case R_PPC64_GOT_TPREL16_HI:
10095 case R_PPC64_GOT_TPREL16_HA:
10096 tls_type = TLS_TLS | TLS_TPREL;
10097 goto dogot;
10098
10099 case R_PPC64_GOT_DTPREL16_DS:
10100 case R_PPC64_GOT_DTPREL16_LO_DS:
10101 case R_PPC64_GOT_DTPREL16_HI:
10102 case R_PPC64_GOT_DTPREL16_HA:
10103 tls_type = TLS_TLS | TLS_DTPREL;
10104 goto dogot;
10105
10106 case R_PPC64_GOT16:
10107 case R_PPC64_GOT16_LO:
10108 case R_PPC64_GOT16_HI:
10109 case R_PPC64_GOT16_HA:
10110 case R_PPC64_GOT16_DS:
10111 case R_PPC64_GOT16_LO_DS:
10112 dogot:
10113 {
10114 /* Relocation is to the entry for this symbol in the global
10115 offset table. */
10116 asection *got;
10117 bfd_vma *offp;
10118 bfd_vma off;
10119 unsigned long indx = 0;
10120
10121 if (tls_type == (TLS_TLS | TLS_LD)
10122 && (h == NULL
10123 || !h->elf.def_dynamic))
10124 offp = &ppc64_tlsld_got (input_bfd)->offset;
10125 else
10126 {
10127 struct got_entry *ent;
10128
10129 if (h != NULL)
10130 {
10131 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10132 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10133 &h->elf)
10134 || (info->shared
10135 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10136 /* This is actually a static link, or it is a
10137 -Bsymbolic link and the symbol is defined
10138 locally, or the symbol was forced to be local
10139 because of a version file. */
10140 ;
10141 else
10142 {
10143 indx = h->elf.dynindx;
10144 unresolved_reloc = FALSE;
10145 }
10146 ent = h->elf.got.glist;
10147 }
10148 else
10149 {
10150 if (local_got_ents == NULL)
10151 abort ();
10152 ent = local_got_ents[r_symndx];
10153 }
10154
10155 for (; ent != NULL; ent = ent->next)
10156 if (ent->addend == rel->r_addend
10157 && ent->owner == input_bfd
10158 && ent->tls_type == tls_type)
10159 break;
10160 if (ent == NULL)
10161 abort ();
10162 offp = &ent->got.offset;
10163 }
10164
10165 got = ppc64_elf_tdata (input_bfd)->got;
10166 if (got == NULL)
10167 abort ();
10168
10169 /* The offset must always be a multiple of 8. We use the
10170 least significant bit to record whether we have already
10171 processed this entry. */
10172 off = *offp;
10173 if ((off & 1) != 0)
10174 off &= ~1;
10175 else
10176 {
10177 /* Generate relocs for the dynamic linker, except in
10178 the case of TLSLD where we'll use one entry per
10179 module. */
10180 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10181
10182 *offp = off | 1;
10183 if ((info->shared || indx != 0)
10184 && (h == NULL
10185 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10186 || h->elf.root.type != bfd_link_hash_undefweak))
10187 {
10188 outrel.r_offset = (got->output_section->vma
10189 + got->output_offset
10190 + off);
10191 outrel.r_addend = rel->r_addend;
10192 if (tls_type & (TLS_LD | TLS_GD))
10193 {
10194 outrel.r_addend = 0;
10195 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10196 if (tls_type == (TLS_TLS | TLS_GD))
10197 {
10198 loc = relgot->contents;
10199 loc += (relgot->reloc_count++
10200 * sizeof (Elf64_External_Rela));
10201 bfd_elf64_swap_reloca_out (output_bfd,
10202 &outrel, loc);
10203 outrel.r_offset += 8;
10204 outrel.r_addend = rel->r_addend;
10205 outrel.r_info
10206 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10207 }
10208 }
10209 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10210 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10211 else if (tls_type == (TLS_TLS | TLS_TPREL))
10212 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10213 else if (indx == 0)
10214 {
10215 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10216
10217 /* Write the .got section contents for the sake
10218 of prelink. */
10219 loc = got->contents + off;
10220 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10221 loc);
10222 }
10223 else
10224 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10225
10226 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10227 {
10228 outrel.r_addend += relocation;
10229 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10230 outrel.r_addend -= htab->elf.tls_sec->vma;
10231 }
10232 loc = relgot->contents;
10233 loc += (relgot->reloc_count++
10234 * sizeof (Elf64_External_Rela));
10235 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10236 }
10237
10238 /* Init the .got section contents here if we're not
10239 emitting a reloc. */
10240 else
10241 {
10242 relocation += rel->r_addend;
10243 if (tls_type == (TLS_TLS | TLS_LD))
10244 relocation = 1;
10245 else if (tls_type != 0)
10246 {
10247 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10248 if (tls_type == (TLS_TLS | TLS_TPREL))
10249 relocation += DTP_OFFSET - TP_OFFSET;
10250
10251 if (tls_type == (TLS_TLS | TLS_GD))
10252 {
10253 bfd_put_64 (output_bfd, relocation,
10254 got->contents + off + 8);
10255 relocation = 1;
10256 }
10257 }
10258
10259 bfd_put_64 (output_bfd, relocation,
10260 got->contents + off);
10261 }
10262 }
10263
10264 if (off >= (bfd_vma) -2)
10265 abort ();
10266
10267 relocation = got->output_offset + off;
10268
10269 /* TOC base (r2) is TOC start plus 0x8000. */
10270 addend = -TOC_BASE_OFF;
10271 }
10272 break;
10273
10274 case R_PPC64_PLT16_HA:
10275 case R_PPC64_PLT16_HI:
10276 case R_PPC64_PLT16_LO:
10277 case R_PPC64_PLT32:
10278 case R_PPC64_PLT64:
10279 /* Relocation is to the entry for this symbol in the
10280 procedure linkage table. */
10281
10282 /* Resolve a PLT reloc against a local symbol directly,
10283 without using the procedure linkage table. */
10284 if (h == NULL)
10285 break;
10286
10287 /* It's possible that we didn't make a PLT entry for this
10288 symbol. This happens when statically linking PIC code,
10289 or when using -Bsymbolic. Go find a match if there is a
10290 PLT entry. */
10291 if (htab->plt != NULL)
10292 {
10293 struct plt_entry *ent;
10294 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10295 if (ent->addend == rel->r_addend
10296 && ent->plt.offset != (bfd_vma) -1)
10297 {
10298 relocation = (htab->plt->output_section->vma
10299 + htab->plt->output_offset
10300 + ent->plt.offset);
10301 unresolved_reloc = FALSE;
10302 }
10303 }
10304 break;
10305
10306 case R_PPC64_TOC:
10307 /* Relocation value is TOC base. */
10308 relocation = TOCstart;
10309 if (r_symndx == 0)
10310 relocation += htab->stub_group[input_section->id].toc_off;
10311 else if (unresolved_reloc)
10312 ;
10313 else if (sec != NULL && sec->id <= htab->top_id)
10314 relocation += htab->stub_group[sec->id].toc_off;
10315 else
10316 unresolved_reloc = TRUE;
10317 goto dodyn2;
10318
10319 /* TOC16 relocs. We want the offset relative to the TOC base,
10320 which is the address of the start of the TOC plus 0x8000.
10321 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10322 in this order. */
10323 case R_PPC64_TOC16:
10324 case R_PPC64_TOC16_LO:
10325 case R_PPC64_TOC16_HI:
10326 case R_PPC64_TOC16_DS:
10327 case R_PPC64_TOC16_LO_DS:
10328 case R_PPC64_TOC16_HA:
10329 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10330 break;
10331
10332 /* Relocate against the beginning of the section. */
10333 case R_PPC64_SECTOFF:
10334 case R_PPC64_SECTOFF_LO:
10335 case R_PPC64_SECTOFF_HI:
10336 case R_PPC64_SECTOFF_DS:
10337 case R_PPC64_SECTOFF_LO_DS:
10338 case R_PPC64_SECTOFF_HA:
10339 if (sec != NULL)
10340 addend -= sec->output_section->vma;
10341 break;
10342
10343 case R_PPC64_REL14:
10344 case R_PPC64_REL14_BRNTAKEN:
10345 case R_PPC64_REL14_BRTAKEN:
10346 case R_PPC64_REL24:
10347 break;
10348
10349 case R_PPC64_TPREL16:
10350 case R_PPC64_TPREL16_LO:
10351 case R_PPC64_TPREL16_HI:
10352 case R_PPC64_TPREL16_HA:
10353 case R_PPC64_TPREL16_DS:
10354 case R_PPC64_TPREL16_LO_DS:
10355 case R_PPC64_TPREL16_HIGHER:
10356 case R_PPC64_TPREL16_HIGHERA:
10357 case R_PPC64_TPREL16_HIGHEST:
10358 case R_PPC64_TPREL16_HIGHESTA:
10359 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10360 if (info->shared)
10361 /* The TPREL16 relocs shouldn't really be used in shared
10362 libs as they will result in DT_TEXTREL being set, but
10363 support them anyway. */
10364 goto dodyn;
10365 break;
10366
10367 case R_PPC64_DTPREL16:
10368 case R_PPC64_DTPREL16_LO:
10369 case R_PPC64_DTPREL16_HI:
10370 case R_PPC64_DTPREL16_HA:
10371 case R_PPC64_DTPREL16_DS:
10372 case R_PPC64_DTPREL16_LO_DS:
10373 case R_PPC64_DTPREL16_HIGHER:
10374 case R_PPC64_DTPREL16_HIGHERA:
10375 case R_PPC64_DTPREL16_HIGHEST:
10376 case R_PPC64_DTPREL16_HIGHESTA:
10377 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10378 break;
10379
10380 case R_PPC64_DTPMOD64:
10381 relocation = 1;
10382 addend = 0;
10383 goto dodyn;
10384
10385 case R_PPC64_TPREL64:
10386 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10387 goto dodyn;
10388
10389 case R_PPC64_DTPREL64:
10390 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10391 /* Fall thru */
10392
10393 /* Relocations that may need to be propagated if this is a
10394 dynamic object. */
10395 case R_PPC64_REL30:
10396 case R_PPC64_REL32:
10397 case R_PPC64_REL64:
10398 case R_PPC64_ADDR14:
10399 case R_PPC64_ADDR14_BRNTAKEN:
10400 case R_PPC64_ADDR14_BRTAKEN:
10401 case R_PPC64_ADDR16:
10402 case R_PPC64_ADDR16_DS:
10403 case R_PPC64_ADDR16_HA:
10404 case R_PPC64_ADDR16_HI:
10405 case R_PPC64_ADDR16_HIGHER:
10406 case R_PPC64_ADDR16_HIGHERA:
10407 case R_PPC64_ADDR16_HIGHEST:
10408 case R_PPC64_ADDR16_HIGHESTA:
10409 case R_PPC64_ADDR16_LO:
10410 case R_PPC64_ADDR16_LO_DS:
10411 case R_PPC64_ADDR24:
10412 case R_PPC64_ADDR32:
10413 case R_PPC64_ADDR64:
10414 case R_PPC64_UADDR16:
10415 case R_PPC64_UADDR32:
10416 case R_PPC64_UADDR64:
10417 /* r_symndx will be zero only for relocs against symbols
10418 from removed linkonce sections, or sections discarded by
10419 a linker script. */
10420 dodyn:
10421 if (r_symndx == 0)
10422 break;
10423 /* Fall thru. */
10424
10425 dodyn2:
10426 if ((input_section->flags & SEC_ALLOC) == 0)
10427 break;
10428
10429 if (NO_OPD_RELOCS && is_opd)
10430 break;
10431
10432 if ((info->shared
10433 && (h == NULL
10434 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10435 || h->elf.root.type != bfd_link_hash_undefweak)
10436 && (MUST_BE_DYN_RELOC (r_type)
10437 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10438 || (ELIMINATE_COPY_RELOCS
10439 && !info->shared
10440 && h != NULL
10441 && h->elf.dynindx != -1
10442 && !h->elf.non_got_ref
10443 && h->elf.def_dynamic
10444 && !h->elf.def_regular))
10445 {
10446 Elf_Internal_Rela outrel;
10447 bfd_boolean skip, relocate;
10448 asection *sreloc;
10449 bfd_byte *loc;
10450 bfd_vma out_off;
10451
10452 /* When generating a dynamic object, these relocations
10453 are copied into the output file to be resolved at run
10454 time. */
10455
10456 skip = FALSE;
10457 relocate = FALSE;
10458
10459 out_off = _bfd_elf_section_offset (output_bfd, info,
10460 input_section, rel->r_offset);
10461 if (out_off == (bfd_vma) -1)
10462 skip = TRUE;
10463 else if (out_off == (bfd_vma) -2)
10464 skip = TRUE, relocate = TRUE;
10465 out_off += (input_section->output_section->vma
10466 + input_section->output_offset);
10467 outrel.r_offset = out_off;
10468 outrel.r_addend = rel->r_addend;
10469
10470 /* Optimize unaligned reloc use. */
10471 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10472 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10473 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10474 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10475 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10476 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10477 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10478 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10479 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10480
10481 if (skip)
10482 memset (&outrel, 0, sizeof outrel);
10483 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10484 && !is_opd
10485 && r_type != R_PPC64_TOC)
10486 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10487 else
10488 {
10489 /* This symbol is local, or marked to become local,
10490 or this is an opd section reloc which must point
10491 at a local function. */
10492 outrel.r_addend += relocation;
10493 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10494 {
10495 if (is_opd && h != NULL)
10496 {
10497 /* Lie about opd entries. This case occurs
10498 when building shared libraries and we
10499 reference a function in another shared
10500 lib. The same thing happens for a weak
10501 definition in an application that's
10502 overridden by a strong definition in a
10503 shared lib. (I believe this is a generic
10504 bug in binutils handling of weak syms.)
10505 In these cases we won't use the opd
10506 entry in this lib. */
10507 unresolved_reloc = FALSE;
10508 }
10509 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10510
10511 /* We need to relocate .opd contents for ld.so.
10512 Prelink also wants simple and consistent rules
10513 for relocs. This make all RELATIVE relocs have
10514 *r_offset equal to r_addend. */
10515 relocate = TRUE;
10516 }
10517 else
10518 {
10519 long indx = 0;
10520
10521 if (bfd_is_abs_section (sec))
10522 ;
10523 else if (sec == NULL || sec->owner == NULL)
10524 {
10525 bfd_set_error (bfd_error_bad_value);
10526 return FALSE;
10527 }
10528 else
10529 {
10530 asection *osec;
10531
10532 osec = sec->output_section;
10533 indx = elf_section_data (osec)->dynindx;
10534
10535 /* We are turning this relocation into one
10536 against a section symbol, so subtract out
10537 the output section's address but not the
10538 offset of the input section in the output
10539 section. */
10540 outrel.r_addend -= osec->vma;
10541 }
10542
10543 outrel.r_info = ELF64_R_INFO (indx, r_type);
10544 }
10545 }
10546
10547 sreloc = elf_section_data (input_section)->sreloc;
10548 if (sreloc == NULL)
10549 abort ();
10550
10551 loc = sreloc->contents;
10552 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10553 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10554
10555 /* If this reloc is against an external symbol, it will
10556 be computed at runtime, so there's no need to do
10557 anything now. However, for the sake of prelink ensure
10558 that the section contents are a known value. */
10559 if (! relocate)
10560 {
10561 unresolved_reloc = FALSE;
10562 /* The value chosen here is quite arbitrary as ld.so
10563 ignores section contents except for the special
10564 case of .opd where the contents might be accessed
10565 before relocation. Choose zero, as that won't
10566 cause reloc overflow. */
10567 relocation = 0;
10568 addend = 0;
10569 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10570 to improve backward compatibility with older
10571 versions of ld. */
10572 if (r_type == R_PPC64_ADDR64)
10573 addend = outrel.r_addend;
10574 /* Adjust pc_relative relocs to have zero in *r_offset. */
10575 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10576 addend = (input_section->output_section->vma
10577 + input_section->output_offset
10578 + rel->r_offset);
10579 }
10580 }
10581 break;
10582
10583 case R_PPC64_COPY:
10584 case R_PPC64_GLOB_DAT:
10585 case R_PPC64_JMP_SLOT:
10586 case R_PPC64_RELATIVE:
10587 /* We shouldn't ever see these dynamic relocs in relocatable
10588 files. */
10589 /* Fall through. */
10590
10591 case R_PPC64_PLTGOT16:
10592 case R_PPC64_PLTGOT16_DS:
10593 case R_PPC64_PLTGOT16_HA:
10594 case R_PPC64_PLTGOT16_HI:
10595 case R_PPC64_PLTGOT16_LO:
10596 case R_PPC64_PLTGOT16_LO_DS:
10597 case R_PPC64_PLTREL32:
10598 case R_PPC64_PLTREL64:
10599 /* These ones haven't been implemented yet. */
10600
10601 (*_bfd_error_handler)
10602 (_("%B: relocation %s is not supported for symbol %s."),
10603 input_bfd,
10604 ppc64_elf_howto_table[r_type]->name, sym_name);
10605
10606 bfd_set_error (bfd_error_invalid_operation);
10607 ret = FALSE;
10608 continue;
10609 }
10610
10611 /* Do any further special processing. */
10612 switch (r_type)
10613 {
10614 default:
10615 break;
10616
10617 case R_PPC64_ADDR16_HA:
10618 case R_PPC64_ADDR16_HIGHERA:
10619 case R_PPC64_ADDR16_HIGHESTA:
10620 case R_PPC64_GOT16_HA:
10621 case R_PPC64_PLTGOT16_HA:
10622 case R_PPC64_PLT16_HA:
10623 case R_PPC64_TOC16_HA:
10624 case R_PPC64_SECTOFF_HA:
10625 case R_PPC64_TPREL16_HA:
10626 case R_PPC64_DTPREL16_HA:
10627 case R_PPC64_GOT_TLSGD16_HA:
10628 case R_PPC64_GOT_TLSLD16_HA:
10629 case R_PPC64_GOT_TPREL16_HA:
10630 case R_PPC64_GOT_DTPREL16_HA:
10631 case R_PPC64_TPREL16_HIGHER:
10632 case R_PPC64_TPREL16_HIGHERA:
10633 case R_PPC64_TPREL16_HIGHEST:
10634 case R_PPC64_TPREL16_HIGHESTA:
10635 case R_PPC64_DTPREL16_HIGHER:
10636 case R_PPC64_DTPREL16_HIGHERA:
10637 case R_PPC64_DTPREL16_HIGHEST:
10638 case R_PPC64_DTPREL16_HIGHESTA:
10639 /* It's just possible that this symbol is a weak symbol
10640 that's not actually defined anywhere. In that case,
10641 'sec' would be NULL, and we should leave the symbol
10642 alone (it will be set to zero elsewhere in the link). */
10643 if (sec != NULL)
10644 /* Add 0x10000 if sign bit in 0:15 is set.
10645 Bits 0:15 are not used. */
10646 addend += 0x8000;
10647 break;
10648
10649 case R_PPC64_ADDR16_DS:
10650 case R_PPC64_ADDR16_LO_DS:
10651 case R_PPC64_GOT16_DS:
10652 case R_PPC64_GOT16_LO_DS:
10653 case R_PPC64_PLT16_LO_DS:
10654 case R_PPC64_SECTOFF_DS:
10655 case R_PPC64_SECTOFF_LO_DS:
10656 case R_PPC64_TOC16_DS:
10657 case R_PPC64_TOC16_LO_DS:
10658 case R_PPC64_PLTGOT16_DS:
10659 case R_PPC64_PLTGOT16_LO_DS:
10660 case R_PPC64_GOT_TPREL16_DS:
10661 case R_PPC64_GOT_TPREL16_LO_DS:
10662 case R_PPC64_GOT_DTPREL16_DS:
10663 case R_PPC64_GOT_DTPREL16_LO_DS:
10664 case R_PPC64_TPREL16_DS:
10665 case R_PPC64_TPREL16_LO_DS:
10666 case R_PPC64_DTPREL16_DS:
10667 case R_PPC64_DTPREL16_LO_DS:
10668 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10669 mask = 3;
10670 /* If this reloc is against an lq insn, then the value must be
10671 a multiple of 16. This is somewhat of a hack, but the
10672 "correct" way to do this by defining _DQ forms of all the
10673 _DS relocs bloats all reloc switches in this file. It
10674 doesn't seem to make much sense to use any of these relocs
10675 in data, so testing the insn should be safe. */
10676 if ((insn & (0x3f << 26)) == (56u << 26))
10677 mask = 15;
10678 if (((relocation + addend) & mask) != 0)
10679 {
10680 (*_bfd_error_handler)
10681 (_("%B: error: relocation %s not a multiple of %d"),
10682 input_bfd,
10683 ppc64_elf_howto_table[r_type]->name,
10684 mask + 1);
10685 bfd_set_error (bfd_error_bad_value);
10686 ret = FALSE;
10687 continue;
10688 }
10689 break;
10690 }
10691
10692 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
10693 because such sections are not SEC_ALLOC and thus ld.so will
10694 not process them. */
10695 if (unresolved_reloc
10696 && !((input_section->flags & SEC_DEBUGGING) != 0
10697 && h->elf.def_dynamic))
10698 {
10699 (*_bfd_error_handler)
10700 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
10701 input_bfd,
10702 input_section,
10703 (long) rel->r_offset,
10704 ppc64_elf_howto_table[(int) r_type]->name,
10705 h->elf.root.root.string);
10706 ret = FALSE;
10707 }
10708
10709 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
10710 input_bfd,
10711 input_section,
10712 contents,
10713 rel->r_offset,
10714 relocation,
10715 addend);
10716
10717 if (r != bfd_reloc_ok)
10718 {
10719 if (sym_name == NULL)
10720 sym_name = "(null)";
10721 if (r == bfd_reloc_overflow)
10722 {
10723 if (warned)
10724 continue;
10725 if (h != NULL
10726 && h->elf.root.type == bfd_link_hash_undefweak
10727 && ppc64_elf_howto_table[r_type]->pc_relative)
10728 {
10729 /* Assume this is a call protected by other code that
10730 detects the symbol is undefined. If this is the case,
10731 we can safely ignore the overflow. If not, the
10732 program is hosed anyway, and a little warning isn't
10733 going to help. */
10734
10735 continue;
10736 }
10737
10738 if (!((*info->callbacks->reloc_overflow)
10739 (info, (h ? &h->elf.root : NULL), sym_name,
10740 ppc64_elf_howto_table[r_type]->name,
10741 rel->r_addend, input_bfd, input_section, rel->r_offset)))
10742 return FALSE;
10743 }
10744 else
10745 {
10746 (*_bfd_error_handler)
10747 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
10748 input_bfd,
10749 input_section,
10750 (long) rel->r_offset,
10751 ppc64_elf_howto_table[r_type]->name,
10752 sym_name,
10753 (int) r);
10754 ret = FALSE;
10755 }
10756 }
10757 }
10758
10759 /* If we're emitting relocations, then shortly after this function
10760 returns, reloc offsets and addends for this section will be
10761 adjusted. Worse, reloc symbol indices will be for the output
10762 file rather than the input. Save a copy of the relocs for
10763 opd_entry_value. */
10764 if (is_opd && info->emitrelocations)
10765 {
10766 bfd_size_type amt;
10767 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
10768 rel = bfd_alloc (input_bfd, amt);
10769 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
10770 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
10771 if (rel == NULL)
10772 return FALSE;
10773 memcpy (rel, relocs, amt);
10774 }
10775 return ret;
10776 }
10777
10778 /* Adjust the value of any local symbols in opd sections. */
10779
10780 static bfd_boolean
10781 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
10782 const char *name ATTRIBUTE_UNUSED,
10783 Elf_Internal_Sym *elfsym,
10784 asection *input_sec,
10785 struct elf_link_hash_entry *h)
10786 {
10787 long *opd_adjust, adjust;
10788 bfd_vma value;
10789
10790 if (h != NULL)
10791 return TRUE;
10792
10793 opd_adjust = get_opd_info (input_sec);
10794 if (opd_adjust == NULL)
10795 return TRUE;
10796
10797 value = elfsym->st_value - input_sec->output_offset;
10798 if (!info->relocatable)
10799 value -= input_sec->output_section->vma;
10800
10801 adjust = opd_adjust[value / 8];
10802 if (adjust == -1)
10803 elfsym->st_value = 0;
10804 else
10805 elfsym->st_value += adjust;
10806 return TRUE;
10807 }
10808
10809 /* Finish up dynamic symbol handling. We set the contents of various
10810 dynamic sections here. */
10811
10812 static bfd_boolean
10813 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
10814 struct bfd_link_info *info,
10815 struct elf_link_hash_entry *h,
10816 Elf_Internal_Sym *sym)
10817 {
10818 struct ppc_link_hash_table *htab;
10819 bfd *dynobj;
10820 struct plt_entry *ent;
10821 Elf_Internal_Rela rela;
10822 bfd_byte *loc;
10823
10824 htab = ppc_hash_table (info);
10825 dynobj = htab->elf.dynobj;
10826
10827 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10828 if (ent->plt.offset != (bfd_vma) -1)
10829 {
10830 /* This symbol has an entry in the procedure linkage
10831 table. Set it up. */
10832
10833 if (htab->plt == NULL
10834 || htab->relplt == NULL
10835 || htab->glink == NULL)
10836 abort ();
10837
10838 /* Create a JMP_SLOT reloc to inform the dynamic linker to
10839 fill in the PLT entry. */
10840 rela.r_offset = (htab->plt->output_section->vma
10841 + htab->plt->output_offset
10842 + ent->plt.offset);
10843 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
10844 rela.r_addend = ent->addend;
10845
10846 loc = htab->relplt->contents;
10847 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
10848 * sizeof (Elf64_External_Rela));
10849 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10850 }
10851
10852 if (h->needs_copy)
10853 {
10854 Elf_Internal_Rela rela;
10855 bfd_byte *loc;
10856
10857 /* This symbol needs a copy reloc. Set it up. */
10858
10859 if (h->dynindx == -1
10860 || (h->root.type != bfd_link_hash_defined
10861 && h->root.type != bfd_link_hash_defweak)
10862 || htab->relbss == NULL)
10863 abort ();
10864
10865 rela.r_offset = (h->root.u.def.value
10866 + h->root.u.def.section->output_section->vma
10867 + h->root.u.def.section->output_offset);
10868 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
10869 rela.r_addend = 0;
10870 loc = htab->relbss->contents;
10871 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
10872 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
10873 }
10874
10875 /* Mark some specially defined symbols as absolute. */
10876 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
10877 sym->st_shndx = SHN_ABS;
10878
10879 return TRUE;
10880 }
10881
10882 /* Used to decide how to sort relocs in an optimal manner for the
10883 dynamic linker, before writing them out. */
10884
10885 static enum elf_reloc_type_class
10886 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
10887 {
10888 enum elf_ppc64_reloc_type r_type;
10889
10890 r_type = ELF64_R_TYPE (rela->r_info);
10891 switch (r_type)
10892 {
10893 case R_PPC64_RELATIVE:
10894 return reloc_class_relative;
10895 case R_PPC64_JMP_SLOT:
10896 return reloc_class_plt;
10897 case R_PPC64_COPY:
10898 return reloc_class_copy;
10899 default:
10900 return reloc_class_normal;
10901 }
10902 }
10903
10904 /* Finish up the dynamic sections. */
10905
10906 static bfd_boolean
10907 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
10908 struct bfd_link_info *info)
10909 {
10910 struct ppc_link_hash_table *htab;
10911 bfd *dynobj;
10912 asection *sdyn;
10913
10914 htab = ppc_hash_table (info);
10915 dynobj = htab->elf.dynobj;
10916 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
10917
10918 if (htab->elf.dynamic_sections_created)
10919 {
10920 Elf64_External_Dyn *dyncon, *dynconend;
10921
10922 if (sdyn == NULL || htab->got == NULL)
10923 abort ();
10924
10925 dyncon = (Elf64_External_Dyn *) sdyn->contents;
10926 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
10927 for (; dyncon < dynconend; dyncon++)
10928 {
10929 Elf_Internal_Dyn dyn;
10930 asection *s;
10931
10932 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
10933
10934 switch (dyn.d_tag)
10935 {
10936 default:
10937 continue;
10938
10939 case DT_PPC64_GLINK:
10940 s = htab->glink;
10941 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10942 /* We stupidly defined DT_PPC64_GLINK to be the start
10943 of glink rather than the first entry point, which is
10944 what ld.so needs, and now have a bigger stub to
10945 support automatic multiple TOCs. */
10946 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
10947 break;
10948
10949 case DT_PPC64_OPD:
10950 s = bfd_get_section_by_name (output_bfd, ".opd");
10951 if (s == NULL)
10952 continue;
10953 dyn.d_un.d_ptr = s->vma;
10954 break;
10955
10956 case DT_PPC64_OPDSZ:
10957 s = bfd_get_section_by_name (output_bfd, ".opd");
10958 if (s == NULL)
10959 continue;
10960 dyn.d_un.d_val = s->size;
10961 break;
10962
10963 case DT_PLTGOT:
10964 s = htab->plt;
10965 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10966 break;
10967
10968 case DT_JMPREL:
10969 s = htab->relplt;
10970 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10971 break;
10972
10973 case DT_PLTRELSZ:
10974 dyn.d_un.d_val = htab->relplt->size;
10975 break;
10976
10977 case DT_RELASZ:
10978 /* Don't count procedure linkage table relocs in the
10979 overall reloc count. */
10980 s = htab->relplt;
10981 if (s == NULL)
10982 continue;
10983 dyn.d_un.d_val -= s->size;
10984 break;
10985
10986 case DT_RELA:
10987 /* We may not be using the standard ELF linker script.
10988 If .rela.plt is the first .rela section, we adjust
10989 DT_RELA to not include it. */
10990 s = htab->relplt;
10991 if (s == NULL)
10992 continue;
10993 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
10994 continue;
10995 dyn.d_un.d_ptr += s->size;
10996 break;
10997 }
10998
10999 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11000 }
11001 }
11002
11003 if (htab->got != NULL && htab->got->size != 0)
11004 {
11005 /* Fill in the first entry in the global offset table.
11006 We use it to hold the link-time TOCbase. */
11007 bfd_put_64 (output_bfd,
11008 elf_gp (output_bfd) + TOC_BASE_OFF,
11009 htab->got->contents);
11010
11011 /* Set .got entry size. */
11012 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11013 }
11014
11015 if (htab->plt != NULL && htab->plt->size != 0)
11016 {
11017 /* Set .plt entry size. */
11018 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11019 = PLT_ENTRY_SIZE;
11020 }
11021
11022 /* We need to handle writing out multiple GOT sections ourselves,
11023 since we didn't add them to DYNOBJ. We know dynobj is the first
11024 bfd. */
11025 while ((dynobj = dynobj->link_next) != NULL)
11026 {
11027 asection *s;
11028
11029 if (!is_ppc64_elf_target (dynobj->xvec))
11030 continue;
11031
11032 s = ppc64_elf_tdata (dynobj)->got;
11033 if (s != NULL
11034 && s->size != 0
11035 && s->output_section != bfd_abs_section_ptr
11036 && !bfd_set_section_contents (output_bfd, s->output_section,
11037 s->contents, s->output_offset,
11038 s->size))
11039 return FALSE;
11040 s = ppc64_elf_tdata (dynobj)->relgot;
11041 if (s != NULL
11042 && s->size != 0
11043 && s->output_section != bfd_abs_section_ptr
11044 && !bfd_set_section_contents (output_bfd, s->output_section,
11045 s->contents, s->output_offset,
11046 s->size))
11047 return FALSE;
11048 }
11049
11050 return TRUE;
11051 }
11052
11053 #include "elf64-target.h"
GDB Binutils - Deliverables
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