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bfd/
[binutils.git] / bfd / elf64-ppc.c
blobd269b9f8d60ad57c696a5aa54d7f9acd4ec91976
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_toc_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc64_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52
53
54 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
55 #define TARGET_LITTLE_NAME "elf64-powerpcle"
56 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
57 #define TARGET_BIG_NAME "elf64-powerpc"
58 #define ELF_ARCH bfd_arch_powerpc
59 #define ELF_MACHINE_CODE EM_PPC64
60 #define ELF_MAXPAGESIZE 0x10000
61 #define elf_info_to_howto ppc64_elf_info_to_howto
62
63 #define elf_backend_want_got_sym 0
64 #define elf_backend_want_plt_sym 0
65 #define elf_backend_plt_alignment 3
66 #define elf_backend_plt_not_loaded 1
67 #define elf_backend_got_symbol_offset 0
68 #define elf_backend_got_header_size 8
69 #define elf_backend_can_gc_sections 1
70 #define elf_backend_can_refcount 1
71 #define elf_backend_rela_normal 1
72
73 #define bfd_elf64_mkobject ppc64_elf_mkobject
74 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
75 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
76 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
77 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
78 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
79
80 #define elf_backend_object_p ppc64_elf_object_p
81 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
82 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
83 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
84 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
85 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
86 #define elf_backend_check_relocs ppc64_elf_check_relocs
87 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
88 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
89 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
90 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
91 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
92 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
93 #define elf_backend_relocate_section ppc64_elf_relocate_section
94 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
95 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
96 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
97 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
98 #define elf_backend_special_sections ppc64_elf_special_sections
99
100 /* The name of the dynamic interpreter. This is put in the .interp
101 section. */
102 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
103
104 /* The size in bytes of an entry in the procedure linkage table. */
105 #define PLT_ENTRY_SIZE 24
106
107 /* The initial size of the plt reserved for the dynamic linker. */
108 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
109
110 /* TOC base pointers offset from start of TOC. */
111 #define TOC_BASE_OFF 0x8000
112
113 /* Offset of tp and dtp pointers from start of TLS block. */
114 #define TP_OFFSET 0x7000
115 #define DTP_OFFSET 0x8000
116
117 /* .plt call stub instructions. The normal stub is like this, but
118 sometimes the .plt entry crosses a 64k boundary and we need to
119 insert an addis to adjust r12. */
120 #define PLT_CALL_STUB_SIZE (7*4)
121 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
122 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
123 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
124 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
125 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
126 /* ld %r11,xxx+16@l(%r12) */
127 #define BCTR 0x4e800420 /* bctr */
128
129
130 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
131 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
132
133 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
134
135 /* glink call stub instructions. We enter with the index in R0, and the
136 address of glink entry in CTR. From that, we can calculate PLT0. */
137 #define GLINK_CALL_STUB_SIZE (16*4)
138 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
139 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
140 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
141 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
142 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
143 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
144 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
145 /* sub %r12,%r12,%r11 */
146 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
148 /* ld %r11,xxx@l(%r12) */
149 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
150 /* ld %r2,8(%r12) */
151 /* mtctr %r11 */
152 /* ld %r11,16(%r12) */
153 /* bctr */
154
155 /* Pad with this. */
156 #define NOP 0x60000000
157
158 /* Some other nops. */
159 #define CROR_151515 0x4def7b82
160 #define CROR_313131 0x4ffffb82
161
162 /* .glink entries for the first 32k functions are two instructions. */
163 #define LI_R0_0 0x38000000 /* li %r0,0 */
164 #define B_DOT 0x48000000 /* b . */
165
166 /* After that, we need two instructions to load the index, followed by
167 a branch. */
168 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
169 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
170
171 /* Instructions to save and restore floating point regs. */
172 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
173 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
174 #define BLR 0x4e800020 /* blr */
175
176 /* Since .opd is an array of descriptors and each entry will end up
177 with identical R_PPC64_RELATIVE relocs, there is really no need to
178 propagate .opd relocs; The dynamic linker should be taught to
179 relocate .opd without reloc entries. */
180 #ifndef NO_OPD_RELOCS
181 #define NO_OPD_RELOCS 0
182 #endif
183 \f
184 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
185
186 /* Relocation HOWTO's. */
187 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
188
189 static reloc_howto_type ppc64_elf_howto_raw[] = {
190 /* This reloc does nothing. */
191 HOWTO (R_PPC64_NONE, /* type */
192 0, /* rightshift */
193 2, /* size (0 = byte, 1 = short, 2 = long) */
194 32, /* bitsize */
195 FALSE, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_dont, /* complain_on_overflow */
198 bfd_elf_generic_reloc, /* special_function */
199 "R_PPC64_NONE", /* name */
200 FALSE, /* partial_inplace */
201 0, /* src_mask */
202 0, /* dst_mask */
203 FALSE), /* pcrel_offset */
204
205 /* A standard 32 bit relocation. */
206 HOWTO (R_PPC64_ADDR32, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_bitfield, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_PPC64_ADDR32", /* name */
215 FALSE, /* partial_inplace */
216 0, /* src_mask */
217 0xffffffff, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* An absolute 26 bit branch; the lower two bits must be zero.
221 FIXME: we don't check that, we just clear them. */
222 HOWTO (R_PPC64_ADDR24, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 26, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_bitfield, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC64_ADDR24", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0x03fffffc, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* A standard 16 bit relocation. */
237 HOWTO (R_PPC64_ADDR16, /* type */
238 0, /* rightshift */
239 1, /* size (0 = byte, 1 = short, 2 = long) */
240 16, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC64_ADDR16", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* A 16 bit relocation without overflow. */
252 HOWTO (R_PPC64_ADDR16_LO, /* type */
253 0, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_dont,/* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_PPC64_ADDR16_LO", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0xffff, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* Bits 16-31 of an address. */
267 HOWTO (R_PPC64_ADDR16_HI, /* type */
268 16, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont, /* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_PPC64_ADDR16_HI", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
282 bits, treated as a signed number, is negative. */
283 HOWTO (R_PPC64_ADDR16_HA, /* type */
284 16, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont, /* complain_on_overflow */
290 ppc64_elf_ha_reloc, /* special_function */
291 "R_PPC64_ADDR16_HA", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* An absolute 16 bit branch; the lower two bits must be zero.
298 FIXME: we don't check that, we just clear them. */
299 HOWTO (R_PPC64_ADDR14, /* type */
300 0, /* rightshift */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
302 16, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_bitfield, /* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_PPC64_ADDR14", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0x0000fffc, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 /* An absolute 16 bit branch, for which bit 10 should be set to
314 indicate that the branch is expected to be taken. The lower two
315 bits must be zero. */
316 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 0, /* bitpos */
322 complain_overflow_bitfield, /* complain_on_overflow */
323 ppc64_elf_brtaken_reloc, /* special_function */
324 "R_PPC64_ADDR14_BRTAKEN",/* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0000fffc, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* An absolute 16 bit branch, for which bit 10 should be set to
331 indicate that the branch is not expected to be taken. The lower
332 two bits must be zero. */
333 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 16, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 ppc64_elf_brtaken_reloc, /* special_function */
341 "R_PPC64_ADDR14_BRNTAKEN",/* name */
342 FALSE, /* partial_inplace */
343 0, /* src_mask */
344 0x0000fffc, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 /* A relative 26 bit branch; the lower two bits must be zero. */
348 HOWTO (R_PPC64_REL24, /* type */
349 0, /* rightshift */
350 2, /* size (0 = byte, 1 = short, 2 = long) */
351 26, /* bitsize */
352 TRUE, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_signed, /* complain_on_overflow */
355 bfd_elf_generic_reloc, /* special_function */
356 "R_PPC64_REL24", /* name */
357 FALSE, /* partial_inplace */
358 0, /* src_mask */
359 0x03fffffc, /* dst_mask */
360 TRUE), /* pcrel_offset */
361
362 /* A relative 16 bit branch; the lower two bits must be zero. */
363 HOWTO (R_PPC64_REL14, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 16, /* bitsize */
367 TRUE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_signed, /* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_PPC64_REL14", /* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0x0000fffc, /* dst_mask */
375 TRUE), /* pcrel_offset */
376
377 /* A relative 16 bit branch. Bit 10 should be set to indicate that
378 the branch is expected to be taken. The lower two bits must be
379 zero. */
380 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
381 0, /* rightshift */
382 2, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 TRUE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_signed, /* complain_on_overflow */
387 ppc64_elf_brtaken_reloc, /* special_function */
388 "R_PPC64_REL14_BRTAKEN", /* name */
389 FALSE, /* partial_inplace */
390 0, /* src_mask */
391 0x0000fffc, /* dst_mask */
392 TRUE), /* pcrel_offset */
393
394 /* A relative 16 bit branch. Bit 10 should be set to indicate that
395 the branch is not expected to be taken. The lower two bits must
396 be zero. */
397 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
398 0, /* rightshift */
399 2, /* size (0 = byte, 1 = short, 2 = long) */
400 16, /* bitsize */
401 TRUE, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_signed, /* complain_on_overflow */
404 ppc64_elf_brtaken_reloc, /* special_function */
405 "R_PPC64_REL14_BRNTAKEN",/* name */
406 FALSE, /* partial_inplace */
407 0, /* src_mask */
408 0x0000fffc, /* dst_mask */
409 TRUE), /* pcrel_offset */
410
411 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
412 symbol. */
413 HOWTO (R_PPC64_GOT16, /* type */
414 0, /* rightshift */
415 1, /* size (0 = byte, 1 = short, 2 = long) */
416 16, /* bitsize */
417 FALSE, /* pc_relative */
418 0, /* bitpos */
419 complain_overflow_signed, /* complain_on_overflow */
420 ppc64_elf_unhandled_reloc, /* special_function */
421 "R_PPC64_GOT16", /* name */
422 FALSE, /* partial_inplace */
423 0, /* src_mask */
424 0xffff, /* dst_mask */
425 FALSE), /* pcrel_offset */
426
427 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
428 the symbol. */
429 HOWTO (R_PPC64_GOT16_LO, /* type */
430 0, /* rightshift */
431 1, /* size (0 = byte, 1 = short, 2 = long) */
432 16, /* bitsize */
433 FALSE, /* pc_relative */
434 0, /* bitpos */
435 complain_overflow_dont, /* complain_on_overflow */
436 ppc64_elf_unhandled_reloc, /* special_function */
437 "R_PPC64_GOT16_LO", /* name */
438 FALSE, /* partial_inplace */
439 0, /* src_mask */
440 0xffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
442
443 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
444 the symbol. */
445 HOWTO (R_PPC64_GOT16_HI, /* type */
446 16, /* rightshift */
447 1, /* size (0 = byte, 1 = short, 2 = long) */
448 16, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_dont,/* complain_on_overflow */
452 ppc64_elf_unhandled_reloc, /* special_function */
453 "R_PPC64_GOT16_HI", /* name */
454 FALSE, /* partial_inplace */
455 0, /* src_mask */
456 0xffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
460 the symbol. */
461 HOWTO (R_PPC64_GOT16_HA, /* type */
462 16, /* rightshift */
463 1, /* size (0 = byte, 1 = short, 2 = long) */
464 16, /* bitsize */
465 FALSE, /* pc_relative */
466 0, /* bitpos */
467 complain_overflow_dont,/* complain_on_overflow */
468 ppc64_elf_unhandled_reloc, /* special_function */
469 "R_PPC64_GOT16_HA", /* name */
470 FALSE, /* partial_inplace */
471 0, /* src_mask */
472 0xffff, /* dst_mask */
473 FALSE), /* pcrel_offset */
474
475 /* This is used only by the dynamic linker. The symbol should exist
476 both in the object being run and in some shared library. The
477 dynamic linker copies the data addressed by the symbol from the
478 shared library into the object, because the object being
479 run has to have the data at some particular address. */
480 HOWTO (R_PPC64_COPY, /* type */
481 0, /* rightshift */
482 0, /* this one is variable size */
483 0, /* bitsize */
484 FALSE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_dont, /* complain_on_overflow */
487 ppc64_elf_unhandled_reloc, /* special_function */
488 "R_PPC64_COPY", /* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0, /* dst_mask */
492 FALSE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR64, but used when setting global offset table
495 entries. */
496 HOWTO (R_PPC64_GLOB_DAT, /* type */
497 0, /* rightshift */
498 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
499 64, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_dont, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GLOB_DAT", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 ONES (64), /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Created by the link editor. Marks a procedure linkage table
511 entry for a symbol. */
512 HOWTO (R_PPC64_JMP_SLOT, /* type */
513 0, /* rightshift */
514 0, /* size (0 = byte, 1 = short, 2 = long) */
515 0, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_JMP_SLOT", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Used only by the dynamic linker. When the object is run, this
527 doubleword64 is set to the load address of the object, plus the
528 addend. */
529 HOWTO (R_PPC64_RELATIVE, /* type */
530 0, /* rightshift */
531 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
532 64, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_dont, /* complain_on_overflow */
536 bfd_elf_generic_reloc, /* special_function */
537 "R_PPC64_RELATIVE", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 ONES (64), /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* Like R_PPC64_ADDR32, but may be unaligned. */
544 HOWTO (R_PPC64_UADDR32, /* type */
545 0, /* rightshift */
546 2, /* size (0 = byte, 1 = short, 2 = long) */
547 32, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_bitfield, /* complain_on_overflow */
551 bfd_elf_generic_reloc, /* special_function */
552 "R_PPC64_UADDR32", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffffffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* Like R_PPC64_ADDR16, but may be unaligned. */
559 HOWTO (R_PPC64_UADDR16, /* type */
560 0, /* rightshift */
561 1, /* size (0 = byte, 1 = short, 2 = long) */
562 16, /* bitsize */
563 FALSE, /* pc_relative */
564 0, /* bitpos */
565 complain_overflow_bitfield, /* complain_on_overflow */
566 bfd_elf_generic_reloc, /* special_function */
567 "R_PPC64_UADDR16", /* name */
568 FALSE, /* partial_inplace */
569 0, /* src_mask */
570 0xffff, /* dst_mask */
571 FALSE), /* pcrel_offset */
572
573 /* 32-bit PC relative. */
574 HOWTO (R_PPC64_REL32, /* type */
575 0, /* rightshift */
576 2, /* size (0 = byte, 1 = short, 2 = long) */
577 32, /* bitsize */
578 TRUE, /* pc_relative */
579 0, /* bitpos */
580 /* FIXME: Verify. Was complain_overflow_bitfield. */
581 complain_overflow_signed, /* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_PPC64_REL32", /* name */
584 FALSE, /* partial_inplace */
585 0, /* src_mask */
586 0xffffffff, /* dst_mask */
587 TRUE), /* pcrel_offset */
588
589 /* 32-bit relocation to the symbol's procedure linkage table. */
590 HOWTO (R_PPC64_PLT32, /* type */
591 0, /* rightshift */
592 2, /* size (0 = byte, 1 = short, 2 = long) */
593 32, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_bitfield, /* complain_on_overflow */
597 ppc64_elf_unhandled_reloc, /* special_function */
598 "R_PPC64_PLT32", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0xffffffff, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
605 FIXME: R_PPC64_PLTREL32 not supported. */
606 HOWTO (R_PPC64_PLTREL32, /* type */
607 0, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 32, /* bitsize */
610 TRUE, /* pc_relative */
611 0, /* bitpos */
612 complain_overflow_signed, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_PPC64_PLTREL32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
619
620 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
621 the symbol. */
622 HOWTO (R_PPC64_PLT16_LO, /* type */
623 0, /* rightshift */
624 1, /* size (0 = byte, 1 = short, 2 = long) */
625 16, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_dont, /* complain_on_overflow */
629 ppc64_elf_unhandled_reloc, /* special_function */
630 "R_PPC64_PLT16_LO", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
637 the symbol. */
638 HOWTO (R_PPC64_PLT16_HI, /* type */
639 16, /* rightshift */
640 1, /* size (0 = byte, 1 = short, 2 = long) */
641 16, /* bitsize */
642 FALSE, /* pc_relative */
643 0, /* bitpos */
644 complain_overflow_dont, /* complain_on_overflow */
645 ppc64_elf_unhandled_reloc, /* special_function */
646 "R_PPC64_PLT16_HI", /* name */
647 FALSE, /* partial_inplace */
648 0, /* src_mask */
649 0xffff, /* dst_mask */
650 FALSE), /* pcrel_offset */
651
652 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
653 the symbol. */
654 HOWTO (R_PPC64_PLT16_HA, /* type */
655 16, /* rightshift */
656 1, /* size (0 = byte, 1 = short, 2 = long) */
657 16, /* bitsize */
658 FALSE, /* pc_relative */
659 0, /* bitpos */
660 complain_overflow_dont, /* complain_on_overflow */
661 ppc64_elf_unhandled_reloc, /* special_function */
662 "R_PPC64_PLT16_HA", /* name */
663 FALSE, /* partial_inplace */
664 0, /* src_mask */
665 0xffff, /* dst_mask */
666 FALSE), /* pcrel_offset */
667
668 /* 16-bit section relative relocation. */
669 HOWTO (R_PPC64_SECTOFF, /* type */
670 0, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_bitfield, /* complain_on_overflow */
676 ppc64_elf_sectoff_reloc, /* special_function */
677 "R_PPC64_SECTOFF", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* Like R_PPC64_SECTOFF, but no overflow warning. */
684 HOWTO (R_PPC64_SECTOFF_LO, /* type */
685 0, /* rightshift */
686 1, /* size (0 = byte, 1 = short, 2 = long) */
687 16, /* bitsize */
688 FALSE, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_dont, /* complain_on_overflow */
691 ppc64_elf_sectoff_reloc, /* special_function */
692 "R_PPC64_SECTOFF_LO", /* name */
693 FALSE, /* partial_inplace */
694 0, /* src_mask */
695 0xffff, /* dst_mask */
696 FALSE), /* pcrel_offset */
697
698 /* 16-bit upper half section relative relocation. */
699 HOWTO (R_PPC64_SECTOFF_HI, /* type */
700 16, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_sectoff_reloc, /* special_function */
707 "R_PPC64_SECTOFF_HI", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit upper half adjusted section relative relocation. */
714 HOWTO (R_PPC64_SECTOFF_HA, /* type */
715 16, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_dont, /* complain_on_overflow */
721 ppc64_elf_sectoff_ha_reloc, /* special_function */
722 "R_PPC64_SECTOFF_HA", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* Like R_PPC64_REL24 without touching the two least significant bits. */
729 HOWTO (R_PPC64_REL30, /* type */
730 2, /* rightshift */
731 2, /* size (0 = byte, 1 = short, 2 = long) */
732 30, /* bitsize */
733 TRUE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 "R_PPC64_REL30", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xfffffffc, /* dst_mask */
741 TRUE), /* pcrel_offset */
742
743 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
744
745 /* A standard 64-bit relocation. */
746 HOWTO (R_PPC64_ADDR64, /* type */
747 0, /* rightshift */
748 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
749 64, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_dont, /* complain_on_overflow */
753 bfd_elf_generic_reloc, /* special_function */
754 "R_PPC64_ADDR64", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 ONES (64), /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* The bits 32-47 of an address. */
761 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
762 32, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 bfd_elf_generic_reloc, /* special_function */
769 "R_PPC64_ADDR16_HIGHER", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* The bits 32-47 of an address, plus 1 if the contents of the low
776 16 bits, treated as a signed number, is negative. */
777 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
778 32, /* rightshift */
779 1, /* size (0 = byte, 1 = short, 2 = long) */
780 16, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 ppc64_elf_ha_reloc, /* special_function */
785 "R_PPC64_ADDR16_HIGHERA", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 0xffff, /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 /* The bits 48-63 of an address. */
792 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
793 48, /* rightshift */
794 1, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 FALSE, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_PPC64_ADDR16_HIGHEST", /* name */
801 FALSE, /* partial_inplace */
802 0, /* src_mask */
803 0xffff, /* dst_mask */
804 FALSE), /* pcrel_offset */
805
806 /* The bits 48-63 of an address, plus 1 if the contents of the low
807 16 bits, treated as a signed number, is negative. */
808 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
809 48, /* rightshift */
810 1, /* size (0 = byte, 1 = short, 2 = long) */
811 16, /* bitsize */
812 FALSE, /* pc_relative */
813 0, /* bitpos */
814 complain_overflow_dont, /* complain_on_overflow */
815 ppc64_elf_ha_reloc, /* special_function */
816 "R_PPC64_ADDR16_HIGHESTA", /* name */
817 FALSE, /* partial_inplace */
818 0, /* src_mask */
819 0xffff, /* dst_mask */
820 FALSE), /* pcrel_offset */
821
822 /* Like ADDR64, but may be unaligned. */
823 HOWTO (R_PPC64_UADDR64, /* type */
824 0, /* rightshift */
825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
826 64, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_UADDR64", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 ONES (64), /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* 64-bit relative relocation. */
838 HOWTO (R_PPC64_REL64, /* type */
839 0, /* rightshift */
840 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
841 64, /* bitsize */
842 TRUE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_REL64", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 ONES (64), /* dst_mask */
850 TRUE), /* pcrel_offset */
851
852 /* 64-bit relocation to the symbol's procedure linkage table. */
853 HOWTO (R_PPC64_PLT64, /* type */
854 0, /* rightshift */
855 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
856 64, /* bitsize */
857 FALSE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_dont, /* complain_on_overflow */
860 ppc64_elf_unhandled_reloc, /* special_function */
861 "R_PPC64_PLT64", /* name */
862 FALSE, /* partial_inplace */
863 0, /* src_mask */
864 ONES (64), /* dst_mask */
865 FALSE), /* pcrel_offset */
866
867 /* 64-bit PC relative relocation to the symbol's procedure linkage
868 table. */
869 /* FIXME: R_PPC64_PLTREL64 not supported. */
870 HOWTO (R_PPC64_PLTREL64, /* type */
871 0, /* rightshift */
872 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
873 64, /* bitsize */
874 TRUE, /* pc_relative */
875 0, /* bitpos */
876 complain_overflow_dont, /* complain_on_overflow */
877 ppc64_elf_unhandled_reloc, /* special_function */
878 "R_PPC64_PLTREL64", /* name */
879 FALSE, /* partial_inplace */
880 0, /* src_mask */
881 ONES (64), /* dst_mask */
882 TRUE), /* pcrel_offset */
883
884 /* 16 bit TOC-relative relocation. */
885
886 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
887 HOWTO (R_PPC64_TOC16, /* type */
888 0, /* rightshift */
889 1, /* size (0 = byte, 1 = short, 2 = long) */
890 16, /* bitsize */
891 FALSE, /* pc_relative */
892 0, /* bitpos */
893 complain_overflow_signed, /* complain_on_overflow */
894 ppc64_elf_toc_reloc, /* special_function */
895 "R_PPC64_TOC16", /* name */
896 FALSE, /* partial_inplace */
897 0, /* src_mask */
898 0xffff, /* dst_mask */
899 FALSE), /* pcrel_offset */
900
901 /* 16 bit TOC-relative relocation without overflow. */
902
903 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
904 HOWTO (R_PPC64_TOC16_LO, /* type */
905 0, /* rightshift */
906 1, /* size (0 = byte, 1 = short, 2 = long) */
907 16, /* bitsize */
908 FALSE, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_dont, /* complain_on_overflow */
911 ppc64_elf_toc_reloc, /* special_function */
912 "R_PPC64_TOC16_LO", /* name */
913 FALSE, /* partial_inplace */
914 0, /* src_mask */
915 0xffff, /* dst_mask */
916 FALSE), /* pcrel_offset */
917
918 /* 16 bit TOC-relative relocation, high 16 bits. */
919
920 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
921 HOWTO (R_PPC64_TOC16_HI, /* type */
922 16, /* rightshift */
923 1, /* size (0 = byte, 1 = short, 2 = long) */
924 16, /* bitsize */
925 FALSE, /* pc_relative */
926 0, /* bitpos */
927 complain_overflow_dont, /* complain_on_overflow */
928 ppc64_elf_toc_reloc, /* special_function */
929 "R_PPC64_TOC16_HI", /* name */
930 FALSE, /* partial_inplace */
931 0, /* src_mask */
932 0xffff, /* dst_mask */
933 FALSE), /* pcrel_offset */
934
935 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
936 contents of the low 16 bits, treated as a signed number, is
937 negative. */
938
939 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
940 HOWTO (R_PPC64_TOC16_HA, /* type */
941 16, /* rightshift */
942 1, /* size (0 = byte, 1 = short, 2 = long) */
943 16, /* bitsize */
944 FALSE, /* pc_relative */
945 0, /* bitpos */
946 complain_overflow_dont, /* complain_on_overflow */
947 ppc64_elf_toc_ha_reloc, /* special_function */
948 "R_PPC64_TOC16_HA", /* name */
949 FALSE, /* partial_inplace */
950 0, /* src_mask */
951 0xffff, /* dst_mask */
952 FALSE), /* pcrel_offset */
953
954 /* 64-bit relocation; insert value of TOC base (.TOC.). */
955
956 /* R_PPC64_TOC 51 doubleword64 .TOC. */
957 HOWTO (R_PPC64_TOC, /* type */
958 0, /* rightshift */
959 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
960 64, /* bitsize */
961 FALSE, /* pc_relative */
962 0, /* bitpos */
963 complain_overflow_bitfield, /* complain_on_overflow */
964 ppc64_elf_toc64_reloc, /* special_function */
965 "R_PPC64_TOC", /* name */
966 FALSE, /* partial_inplace */
967 0, /* src_mask */
968 ONES (64), /* dst_mask */
969 FALSE), /* pcrel_offset */
970
971 /* Like R_PPC64_GOT16, but also informs the link editor that the
972 value to relocate may (!) refer to a PLT entry which the link
973 editor (a) may replace with the symbol value. If the link editor
974 is unable to fully resolve the symbol, it may (b) create a PLT
975 entry and store the address to the new PLT entry in the GOT.
976 This permits lazy resolution of function symbols at run time.
977 The link editor may also skip all of this and just (c) emit a
978 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
979 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
980 HOWTO (R_PPC64_PLTGOT16, /* type */
981 0, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_signed, /* complain_on_overflow */
987 ppc64_elf_unhandled_reloc, /* special_function */
988 "R_PPC64_PLTGOT16", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Like R_PPC64_PLTGOT16, but without overflow. */
995 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
996 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
997 0, /* rightshift */
998 1, /* size (0 = byte, 1 = short, 2 = long) */
999 16, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_dont, /* complain_on_overflow */
1003 ppc64_elf_unhandled_reloc, /* special_function */
1004 "R_PPC64_PLTGOT16_LO", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 0xffff, /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1011 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1012 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1013 16, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc64_elf_unhandled_reloc, /* special_function */
1020 "R_PPC64_PLTGOT16_HI", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1027 1 if the contents of the low 16 bits, treated as a signed number,
1028 is negative. */
1029 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1030 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1031 16, /* rightshift */
1032 1, /* size (0 = byte, 1 = short, 2 = long) */
1033 16, /* bitsize */
1034 FALSE, /* pc_relative */
1035 0, /* bitpos */
1036 complain_overflow_dont,/* complain_on_overflow */
1037 ppc64_elf_unhandled_reloc, /* special_function */
1038 "R_PPC64_PLTGOT16_HA", /* name */
1039 FALSE, /* partial_inplace */
1040 0, /* src_mask */
1041 0xffff, /* dst_mask */
1042 FALSE), /* pcrel_offset */
1043
1044 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1045 HOWTO (R_PPC64_ADDR16_DS, /* type */
1046 0, /* rightshift */
1047 1, /* size (0 = byte, 1 = short, 2 = long) */
1048 16, /* bitsize */
1049 FALSE, /* pc_relative */
1050 0, /* bitpos */
1051 complain_overflow_bitfield, /* complain_on_overflow */
1052 bfd_elf_generic_reloc, /* special_function */
1053 "R_PPC64_ADDR16_DS", /* name */
1054 FALSE, /* partial_inplace */
1055 0, /* src_mask */
1056 0xfffc, /* dst_mask */
1057 FALSE), /* pcrel_offset */
1058
1059 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1060 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1061 0, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_dont,/* complain_on_overflow */
1067 bfd_elf_generic_reloc, /* special_function */
1068 "R_PPC64_ADDR16_LO_DS",/* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xfffc, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1075 HOWTO (R_PPC64_GOT16_DS, /* type */
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_signed, /* complain_on_overflow */
1082 ppc64_elf_unhandled_reloc, /* special_function */
1083 "R_PPC64_GOT16_DS", /* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xfffc, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1090 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1091 0, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_dont, /* complain_on_overflow */
1097 ppc64_elf_unhandled_reloc, /* special_function */
1098 "R_PPC64_GOT16_LO_DS", /* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xfffc, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1105 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1106 0, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 ppc64_elf_unhandled_reloc, /* special_function */
1113 "R_PPC64_PLT16_LO_DS", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xfffc, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1120 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1121 0, /* rightshift */
1122 1, /* size (0 = byte, 1 = short, 2 = long) */
1123 16, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_bitfield, /* complain_on_overflow */
1127 ppc64_elf_sectoff_reloc, /* special_function */
1128 "R_PPC64_SECTOFF_DS", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xfffc, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133
1134 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1135 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1136 0, /* rightshift */
1137 1, /* size (0 = byte, 1 = short, 2 = long) */
1138 16, /* bitsize */
1139 FALSE, /* pc_relative */
1140 0, /* bitpos */
1141 complain_overflow_dont, /* complain_on_overflow */
1142 ppc64_elf_sectoff_reloc, /* special_function */
1143 "R_PPC64_SECTOFF_LO_DS",/* name */
1144 FALSE, /* partial_inplace */
1145 0, /* src_mask */
1146 0xfffc, /* dst_mask */
1147 FALSE), /* pcrel_offset */
1148
1149 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1150 HOWTO (R_PPC64_TOC16_DS, /* type */
1151 0, /* rightshift */
1152 1, /* size (0 = byte, 1 = short, 2 = long) */
1153 16, /* bitsize */
1154 FALSE, /* pc_relative */
1155 0, /* bitpos */
1156 complain_overflow_signed, /* complain_on_overflow */
1157 ppc64_elf_toc_reloc, /* special_function */
1158 "R_PPC64_TOC16_DS", /* name */
1159 FALSE, /* partial_inplace */
1160 0, /* src_mask */
1161 0xfffc, /* dst_mask */
1162 FALSE), /* pcrel_offset */
1163
1164 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1165 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1166 0, /* rightshift */
1167 1, /* size (0 = byte, 1 = short, 2 = long) */
1168 16, /* bitsize */
1169 FALSE, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_dont, /* complain_on_overflow */
1172 ppc64_elf_toc_reloc, /* special_function */
1173 "R_PPC64_TOC16_LO_DS", /* name */
1174 FALSE, /* partial_inplace */
1175 0, /* src_mask */
1176 0xfffc, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1178
1179 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1180 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1181 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1182 0, /* rightshift */
1183 1, /* size (0 = byte, 1 = short, 2 = long) */
1184 16, /* bitsize */
1185 FALSE, /* pc_relative */
1186 0, /* bitpos */
1187 complain_overflow_signed, /* complain_on_overflow */
1188 ppc64_elf_unhandled_reloc, /* special_function */
1189 "R_PPC64_PLTGOT16_DS", /* name */
1190 FALSE, /* partial_inplace */
1191 0, /* src_mask */
1192 0xfffc, /* dst_mask */
1193 FALSE), /* pcrel_offset */
1194
1195 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1196 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1197 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_dont, /* complain_on_overflow */
1204 ppc64_elf_unhandled_reloc, /* special_function */
1205 "R_PPC64_PLTGOT16_LO_DS",/* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Marker reloc for TLS. */
1212 HOWTO (R_PPC64_TLS,
1213 0, /* rightshift */
1214 2, /* size (0 = byte, 1 = short, 2 = long) */
1215 32, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC64_TLS", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Computes the load module index of the load module that contains the
1227 definition of its TLS sym. */
1228 HOWTO (R_PPC64_DTPMOD64,
1229 0, /* rightshift */
1230 4, /* size (0 = byte, 1 = short, 2 = long) */
1231 64, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 ppc64_elf_unhandled_reloc, /* special_function */
1236 "R_PPC64_DTPMOD64", /* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 ONES (64), /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* Computes a dtv-relative displacement, the difference between the value
1243 of sym+add and the base address of the thread-local storage block that
1244 contains the definition of sym, minus 0x8000. */
1245 HOWTO (R_PPC64_DTPREL64,
1246 0, /* rightshift */
1247 4, /* size (0 = byte, 1 = short, 2 = long) */
1248 64, /* bitsize */
1249 FALSE, /* pc_relative */
1250 0, /* bitpos */
1251 complain_overflow_dont, /* complain_on_overflow */
1252 ppc64_elf_unhandled_reloc, /* special_function */
1253 "R_PPC64_DTPREL64", /* name */
1254 FALSE, /* partial_inplace */
1255 0, /* src_mask */
1256 ONES (64), /* dst_mask */
1257 FALSE), /* pcrel_offset */
1258
1259 /* A 16 bit dtprel reloc. */
1260 HOWTO (R_PPC64_DTPREL16,
1261 0, /* rightshift */
1262 1, /* size (0 = byte, 1 = short, 2 = long) */
1263 16, /* bitsize */
1264 FALSE, /* pc_relative */
1265 0, /* bitpos */
1266 complain_overflow_signed, /* complain_on_overflow */
1267 ppc64_elf_unhandled_reloc, /* special_function */
1268 "R_PPC64_DTPREL16", /* name */
1269 FALSE, /* partial_inplace */
1270 0, /* src_mask */
1271 0xffff, /* dst_mask */
1272 FALSE), /* pcrel_offset */
1273
1274 /* Like DTPREL16, but no overflow. */
1275 HOWTO (R_PPC64_DTPREL16_LO,
1276 0, /* rightshift */
1277 1, /* size (0 = byte, 1 = short, 2 = long) */
1278 16, /* bitsize */
1279 FALSE, /* pc_relative */
1280 0, /* bitpos */
1281 complain_overflow_dont, /* complain_on_overflow */
1282 ppc64_elf_unhandled_reloc, /* special_function */
1283 "R_PPC64_DTPREL16_LO", /* name */
1284 FALSE, /* partial_inplace */
1285 0, /* src_mask */
1286 0xffff, /* dst_mask */
1287 FALSE), /* pcrel_offset */
1288
1289 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1290 HOWTO (R_PPC64_DTPREL16_HI,
1291 16, /* rightshift */
1292 1, /* size (0 = byte, 1 = short, 2 = long) */
1293 16, /* bitsize */
1294 FALSE, /* pc_relative */
1295 0, /* bitpos */
1296 complain_overflow_dont, /* complain_on_overflow */
1297 ppc64_elf_unhandled_reloc, /* special_function */
1298 "R_PPC64_DTPREL16_HI", /* name */
1299 FALSE, /* partial_inplace */
1300 0, /* src_mask */
1301 0xffff, /* dst_mask */
1302 FALSE), /* pcrel_offset */
1303
1304 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1305 HOWTO (R_PPC64_DTPREL16_HA,
1306 16, /* rightshift */
1307 1, /* size (0 = byte, 1 = short, 2 = long) */
1308 16, /* bitsize */
1309 FALSE, /* pc_relative */
1310 0, /* bitpos */
1311 complain_overflow_dont, /* complain_on_overflow */
1312 ppc64_elf_unhandled_reloc, /* special_function */
1313 "R_PPC64_DTPREL16_HA", /* name */
1314 FALSE, /* partial_inplace */
1315 0, /* src_mask */
1316 0xffff, /* dst_mask */
1317 FALSE), /* pcrel_offset */
1318
1319 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1320 HOWTO (R_PPC64_DTPREL16_HIGHER,
1321 32, /* rightshift */
1322 1, /* size (0 = byte, 1 = short, 2 = long) */
1323 16, /* bitsize */
1324 FALSE, /* pc_relative */
1325 0, /* bitpos */
1326 complain_overflow_dont, /* complain_on_overflow */
1327 ppc64_elf_unhandled_reloc, /* special_function */
1328 "R_PPC64_DTPREL16_HIGHER", /* name */
1329 FALSE, /* partial_inplace */
1330 0, /* src_mask */
1331 0xffff, /* dst_mask */
1332 FALSE), /* pcrel_offset */
1333
1334 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1335 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1336 32, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 FALSE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_dont, /* complain_on_overflow */
1342 ppc64_elf_unhandled_reloc, /* special_function */
1343 "R_PPC64_DTPREL16_HIGHERA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1350 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1351 48, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 FALSE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_dont, /* complain_on_overflow */
1357 ppc64_elf_unhandled_reloc, /* special_function */
1358 "R_PPC64_DTPREL16_HIGHEST", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 FALSE), /* pcrel_offset */
1363
1364 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1365 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1366 48, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 FALSE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont, /* complain_on_overflow */
1372 ppc64_elf_unhandled_reloc, /* special_function */
1373 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 FALSE), /* pcrel_offset */
1378
1379 /* Like DTPREL16, but for insns with a DS field. */
1380 HOWTO (R_PPC64_DTPREL16_DS,
1381 0, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 FALSE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_signed, /* complain_on_overflow */
1387 ppc64_elf_unhandled_reloc, /* special_function */
1388 "R_PPC64_DTPREL16_DS", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xfffc, /* dst_mask */
1392 FALSE), /* pcrel_offset */
1393
1394 /* Like DTPREL16_DS, but no overflow. */
1395 HOWTO (R_PPC64_DTPREL16_LO_DS,
1396 0, /* rightshift */
1397 1, /* size (0 = byte, 1 = short, 2 = long) */
1398 16, /* bitsize */
1399 FALSE, /* pc_relative */
1400 0, /* bitpos */
1401 complain_overflow_dont, /* complain_on_overflow */
1402 ppc64_elf_unhandled_reloc, /* special_function */
1403 "R_PPC64_DTPREL16_LO_DS", /* name */
1404 FALSE, /* partial_inplace */
1405 0, /* src_mask */
1406 0xfffc, /* dst_mask */
1407 FALSE), /* pcrel_offset */
1408
1409 /* Computes a tp-relative displacement, the difference between the value of
1410 sym+add and the value of the thread pointer (r13). */
1411 HOWTO (R_PPC64_TPREL64,
1412 0, /* rightshift */
1413 4, /* size (0 = byte, 1 = short, 2 = long) */
1414 64, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 ppc64_elf_unhandled_reloc, /* special_function */
1419 "R_PPC64_TPREL64", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 ONES (64), /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* A 16 bit tprel reloc. */
1426 HOWTO (R_PPC64_TPREL16,
1427 0, /* rightshift */
1428 1, /* size (0 = byte, 1 = short, 2 = long) */
1429 16, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_signed, /* complain_on_overflow */
1433 ppc64_elf_unhandled_reloc, /* special_function */
1434 "R_PPC64_TPREL16", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0xffff, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Like TPREL16, but no overflow. */
1441 HOWTO (R_PPC64_TPREL16_LO,
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_dont, /* complain_on_overflow */
1448 ppc64_elf_unhandled_reloc, /* special_function */
1449 "R_PPC64_TPREL16_LO", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454
1455 /* Like TPREL16_LO, but next higher group of 16 bits. */
1456 HOWTO (R_PPC64_TPREL16_HI,
1457 16, /* rightshift */
1458 1, /* size (0 = byte, 1 = short, 2 = long) */
1459 16, /* bitsize */
1460 FALSE, /* pc_relative */
1461 0, /* bitpos */
1462 complain_overflow_dont, /* complain_on_overflow */
1463 ppc64_elf_unhandled_reloc, /* special_function */
1464 "R_PPC64_TPREL16_HI", /* name */
1465 FALSE, /* partial_inplace */
1466 0, /* src_mask */
1467 0xffff, /* dst_mask */
1468 FALSE), /* pcrel_offset */
1469
1470 /* Like TPREL16_HI, but adjust for low 16 bits. */
1471 HOWTO (R_PPC64_TPREL16_HA,
1472 16, /* rightshift */
1473 1, /* size (0 = byte, 1 = short, 2 = long) */
1474 16, /* bitsize */
1475 FALSE, /* pc_relative */
1476 0, /* bitpos */
1477 complain_overflow_dont, /* complain_on_overflow */
1478 ppc64_elf_unhandled_reloc, /* special_function */
1479 "R_PPC64_TPREL16_HA", /* name */
1480 FALSE, /* partial_inplace */
1481 0, /* src_mask */
1482 0xffff, /* dst_mask */
1483 FALSE), /* pcrel_offset */
1484
1485 /* Like TPREL16_HI, but next higher group of 16 bits. */
1486 HOWTO (R_PPC64_TPREL16_HIGHER,
1487 32, /* rightshift */
1488 1, /* size (0 = byte, 1 = short, 2 = long) */
1489 16, /* bitsize */
1490 FALSE, /* pc_relative */
1491 0, /* bitpos */
1492 complain_overflow_dont, /* complain_on_overflow */
1493 ppc64_elf_unhandled_reloc, /* special_function */
1494 "R_PPC64_TPREL16_HIGHER", /* name */
1495 FALSE, /* partial_inplace */
1496 0, /* src_mask */
1497 0xffff, /* dst_mask */
1498 FALSE), /* pcrel_offset */
1499
1500 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1501 HOWTO (R_PPC64_TPREL16_HIGHERA,
1502 32, /* rightshift */
1503 1, /* size (0 = byte, 1 = short, 2 = long) */
1504 16, /* bitsize */
1505 FALSE, /* pc_relative */
1506 0, /* bitpos */
1507 complain_overflow_dont, /* complain_on_overflow */
1508 ppc64_elf_unhandled_reloc, /* special_function */
1509 "R_PPC64_TPREL16_HIGHERA", /* name */
1510 FALSE, /* partial_inplace */
1511 0, /* src_mask */
1512 0xffff, /* dst_mask */
1513 FALSE), /* pcrel_offset */
1514
1515 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1516 HOWTO (R_PPC64_TPREL16_HIGHEST,
1517 48, /* rightshift */
1518 1, /* size (0 = byte, 1 = short, 2 = long) */
1519 16, /* bitsize */
1520 FALSE, /* pc_relative */
1521 0, /* bitpos */
1522 complain_overflow_dont, /* complain_on_overflow */
1523 ppc64_elf_unhandled_reloc, /* special_function */
1524 "R_PPC64_TPREL16_HIGHEST", /* name */
1525 FALSE, /* partial_inplace */
1526 0, /* src_mask */
1527 0xffff, /* dst_mask */
1528 FALSE), /* pcrel_offset */
1529
1530 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1531 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1532 48, /* rightshift */
1533 1, /* size (0 = byte, 1 = short, 2 = long) */
1534 16, /* bitsize */
1535 FALSE, /* pc_relative */
1536 0, /* bitpos */
1537 complain_overflow_dont, /* complain_on_overflow */
1538 ppc64_elf_unhandled_reloc, /* special_function */
1539 "R_PPC64_TPREL16_HIGHESTA", /* name */
1540 FALSE, /* partial_inplace */
1541 0, /* src_mask */
1542 0xffff, /* dst_mask */
1543 FALSE), /* pcrel_offset */
1544
1545 /* Like TPREL16, but for insns with a DS field. */
1546 HOWTO (R_PPC64_TPREL16_DS,
1547 0, /* rightshift */
1548 1, /* size (0 = byte, 1 = short, 2 = long) */
1549 16, /* bitsize */
1550 FALSE, /* pc_relative */
1551 0, /* bitpos */
1552 complain_overflow_signed, /* complain_on_overflow */
1553 ppc64_elf_unhandled_reloc, /* special_function */
1554 "R_PPC64_TPREL16_DS", /* name */
1555 FALSE, /* partial_inplace */
1556 0, /* src_mask */
1557 0xfffc, /* dst_mask */
1558 FALSE), /* pcrel_offset */
1559
1560 /* Like TPREL16_DS, but no overflow. */
1561 HOWTO (R_PPC64_TPREL16_LO_DS,
1562 0, /* rightshift */
1563 1, /* size (0 = byte, 1 = short, 2 = long) */
1564 16, /* bitsize */
1565 FALSE, /* pc_relative */
1566 0, /* bitpos */
1567 complain_overflow_dont, /* complain_on_overflow */
1568 ppc64_elf_unhandled_reloc, /* special_function */
1569 "R_PPC64_TPREL16_LO_DS", /* name */
1570 FALSE, /* partial_inplace */
1571 0, /* src_mask */
1572 0xfffc, /* dst_mask */
1573 FALSE), /* pcrel_offset */
1574
1575 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1576 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1577 to the first entry relative to the TOC base (r2). */
1578 HOWTO (R_PPC64_GOT_TLSGD16,
1579 0, /* rightshift */
1580 1, /* size (0 = byte, 1 = short, 2 = long) */
1581 16, /* bitsize */
1582 FALSE, /* pc_relative */
1583 0, /* bitpos */
1584 complain_overflow_signed, /* complain_on_overflow */
1585 ppc64_elf_unhandled_reloc, /* special_function */
1586 "R_PPC64_GOT_TLSGD16", /* name */
1587 FALSE, /* partial_inplace */
1588 0, /* src_mask */
1589 0xffff, /* dst_mask */
1590 FALSE), /* pcrel_offset */
1591
1592 /* Like GOT_TLSGD16, but no overflow. */
1593 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1594 0, /* rightshift */
1595 1, /* size (0 = byte, 1 = short, 2 = long) */
1596 16, /* bitsize */
1597 FALSE, /* pc_relative */
1598 0, /* bitpos */
1599 complain_overflow_dont, /* complain_on_overflow */
1600 ppc64_elf_unhandled_reloc, /* special_function */
1601 "R_PPC64_GOT_TLSGD16_LO", /* name */
1602 FALSE, /* partial_inplace */
1603 0, /* src_mask */
1604 0xffff, /* dst_mask */
1605 FALSE), /* pcrel_offset */
1606
1607 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1608 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1609 16, /* rightshift */
1610 1, /* size (0 = byte, 1 = short, 2 = long) */
1611 16, /* bitsize */
1612 FALSE, /* pc_relative */
1613 0, /* bitpos */
1614 complain_overflow_dont, /* complain_on_overflow */
1615 ppc64_elf_unhandled_reloc, /* special_function */
1616 "R_PPC64_GOT_TLSGD16_HI", /* name */
1617 FALSE, /* partial_inplace */
1618 0, /* src_mask */
1619 0xffff, /* dst_mask */
1620 FALSE), /* pcrel_offset */
1621
1622 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1623 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1624 16, /* rightshift */
1625 1, /* size (0 = byte, 1 = short, 2 = long) */
1626 16, /* bitsize */
1627 FALSE, /* pc_relative */
1628 0, /* bitpos */
1629 complain_overflow_dont, /* complain_on_overflow */
1630 ppc64_elf_unhandled_reloc, /* special_function */
1631 "R_PPC64_GOT_TLSGD16_HA", /* name */
1632 FALSE, /* partial_inplace */
1633 0, /* src_mask */
1634 0xffff, /* dst_mask */
1635 FALSE), /* pcrel_offset */
1636
1637 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1638 with values (sym+add)@dtpmod and zero, and computes the offset to the
1639 first entry relative to the TOC base (r2). */
1640 HOWTO (R_PPC64_GOT_TLSLD16,
1641 0, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_signed, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_GOT_TLSLD16", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like GOT_TLSLD16, but no overflow. */
1655 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1656 0, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_GOT_TLSLD16_LO", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1670 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1671 16, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_dont, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_GOT_TLSLD16_HI", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xffff, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1685 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1686 16, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_GOT_TLSLD16_HA", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xffff, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1700 the offset to the entry relative to the TOC base (r2). */
1701 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1702 0, /* rightshift */
1703 1, /* size (0 = byte, 1 = short, 2 = long) */
1704 16, /* bitsize */
1705 FALSE, /* pc_relative */
1706 0, /* bitpos */
1707 complain_overflow_signed, /* complain_on_overflow */
1708 ppc64_elf_unhandled_reloc, /* special_function */
1709 "R_PPC64_GOT_DTPREL16_DS", /* name */
1710 FALSE, /* partial_inplace */
1711 0, /* src_mask */
1712 0xfffc, /* dst_mask */
1713 FALSE), /* pcrel_offset */
1714
1715 /* Like GOT_DTPREL16_DS, but no overflow. */
1716 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1717 0, /* rightshift */
1718 1, /* size (0 = byte, 1 = short, 2 = long) */
1719 16, /* bitsize */
1720 FALSE, /* pc_relative */
1721 0, /* bitpos */
1722 complain_overflow_dont, /* complain_on_overflow */
1723 ppc64_elf_unhandled_reloc, /* special_function */
1724 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1725 FALSE, /* partial_inplace */
1726 0, /* src_mask */
1727 0xfffc, /* dst_mask */
1728 FALSE), /* pcrel_offset */
1729
1730 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1731 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1732 16, /* rightshift */
1733 1, /* size (0 = byte, 1 = short, 2 = long) */
1734 16, /* bitsize */
1735 FALSE, /* pc_relative */
1736 0, /* bitpos */
1737 complain_overflow_dont, /* complain_on_overflow */
1738 ppc64_elf_unhandled_reloc, /* special_function */
1739 "R_PPC64_GOT_DTPREL16_HI", /* name */
1740 FALSE, /* partial_inplace */
1741 0, /* src_mask */
1742 0xffff, /* dst_mask */
1743 FALSE), /* pcrel_offset */
1744
1745 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1746 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1747 16, /* rightshift */
1748 1, /* size (0 = byte, 1 = short, 2 = long) */
1749 16, /* bitsize */
1750 FALSE, /* pc_relative */
1751 0, /* bitpos */
1752 complain_overflow_dont, /* complain_on_overflow */
1753 ppc64_elf_unhandled_reloc, /* special_function */
1754 "R_PPC64_GOT_DTPREL16_HA", /* name */
1755 FALSE, /* partial_inplace */
1756 0, /* src_mask */
1757 0xffff, /* dst_mask */
1758 FALSE), /* pcrel_offset */
1759
1760 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1761 offset to the entry relative to the TOC base (r2). */
1762 HOWTO (R_PPC64_GOT_TPREL16_DS,
1763 0, /* rightshift */
1764 1, /* size (0 = byte, 1 = short, 2 = long) */
1765 16, /* bitsize */
1766 FALSE, /* pc_relative */
1767 0, /* bitpos */
1768 complain_overflow_signed, /* complain_on_overflow */
1769 ppc64_elf_unhandled_reloc, /* special_function */
1770 "R_PPC64_GOT_TPREL16_DS", /* name */
1771 FALSE, /* partial_inplace */
1772 0, /* src_mask */
1773 0xfffc, /* dst_mask */
1774 FALSE), /* pcrel_offset */
1775
1776 /* Like GOT_TPREL16_DS, but no overflow. */
1777 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1778 0, /* rightshift */
1779 1, /* size (0 = byte, 1 = short, 2 = long) */
1780 16, /* bitsize */
1781 FALSE, /* pc_relative */
1782 0, /* bitpos */
1783 complain_overflow_dont, /* complain_on_overflow */
1784 ppc64_elf_unhandled_reloc, /* special_function */
1785 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1786 FALSE, /* partial_inplace */
1787 0, /* src_mask */
1788 0xfffc, /* dst_mask */
1789 FALSE), /* pcrel_offset */
1790
1791 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1792 HOWTO (R_PPC64_GOT_TPREL16_HI,
1793 16, /* rightshift */
1794 1, /* size (0 = byte, 1 = short, 2 = long) */
1795 16, /* bitsize */
1796 FALSE, /* pc_relative */
1797 0, /* bitpos */
1798 complain_overflow_dont, /* complain_on_overflow */
1799 ppc64_elf_unhandled_reloc, /* special_function */
1800 "R_PPC64_GOT_TPREL16_HI", /* name */
1801 FALSE, /* partial_inplace */
1802 0, /* src_mask */
1803 0xffff, /* dst_mask */
1804 FALSE), /* pcrel_offset */
1805
1806 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1807 HOWTO (R_PPC64_GOT_TPREL16_HA,
1808 16, /* rightshift */
1809 1, /* size (0 = byte, 1 = short, 2 = long) */
1810 16, /* bitsize */
1811 FALSE, /* pc_relative */
1812 0, /* bitpos */
1813 complain_overflow_dont, /* complain_on_overflow */
1814 ppc64_elf_unhandled_reloc, /* special_function */
1815 "R_PPC64_GOT_TPREL16_HA", /* name */
1816 FALSE, /* partial_inplace */
1817 0, /* src_mask */
1818 0xffff, /* dst_mask */
1819 FALSE), /* pcrel_offset */
1820
1821 /* GNU extension to record C++ vtable hierarchy. */
1822 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1823 0, /* rightshift */
1824 0, /* size (0 = byte, 1 = short, 2 = long) */
1825 0, /* bitsize */
1826 FALSE, /* pc_relative */
1827 0, /* bitpos */
1828 complain_overflow_dont, /* complain_on_overflow */
1829 NULL, /* special_function */
1830 "R_PPC64_GNU_VTINHERIT", /* name */
1831 FALSE, /* partial_inplace */
1832 0, /* src_mask */
1833 0, /* dst_mask */
1834 FALSE), /* pcrel_offset */
1835
1836 /* GNU extension to record C++ vtable member usage. */
1837 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1838 0, /* rightshift */
1839 0, /* size (0 = byte, 1 = short, 2 = long) */
1840 0, /* bitsize */
1841 FALSE, /* pc_relative */
1842 0, /* bitpos */
1843 complain_overflow_dont, /* complain_on_overflow */
1844 NULL, /* special_function */
1845 "R_PPC64_GNU_VTENTRY", /* name */
1846 FALSE, /* partial_inplace */
1847 0, /* src_mask */
1848 0, /* dst_mask */
1849 FALSE), /* pcrel_offset */
1850 };
1851
1852 \f
1853 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1854 be done. */
1855
1856 static void
1857 ppc_howto_init (void)
1858 {
1859 unsigned int i, type;
1860
1861 for (i = 0;
1862 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1863 i++)
1864 {
1865 type = ppc64_elf_howto_raw[i].type;
1866 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1867 / sizeof (ppc64_elf_howto_table[0])));
1868 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1869 }
1870 }
1871
1872 static reloc_howto_type *
1873 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1874 bfd_reloc_code_real_type code)
1875 {
1876 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1877
1878 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1879 /* Initialize howto table if needed. */
1880 ppc_howto_init ();
1881
1882 switch (code)
1883 {
1884 default:
1885 return NULL;
1886
1887 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1888 break;
1889 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1890 break;
1891 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1892 break;
1893 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1894 break;
1895 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1896 break;
1897 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1898 break;
1899 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1900 break;
1901 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1902 break;
1903 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1904 break;
1905 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1906 break;
1907 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1908 break;
1909 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1910 break;
1911 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1912 break;
1913 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1914 break;
1915 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1916 break;
1917 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1918 break;
1919 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1920 break;
1921 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1922 break;
1923 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1924 break;
1925 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1926 break;
1927 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1928 break;
1929 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1930 break;
1931 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1932 break;
1933 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1934 break;
1935 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1936 break;
1937 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1938 break;
1939 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1940 break;
1941 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1942 break;
1943 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1944 break;
1945 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1946 break;
1947 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1948 break;
1949 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1950 break;
1951 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1952 break;
1953 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1954 break;
1955 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1956 break;
1957 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1958 break;
1959 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1960 break;
1961 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1962 break;
1963 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1964 break;
1965 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1966 break;
1967 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1968 break;
1969 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1970 break;
1971 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1972 break;
1973 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1974 break;
1975 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1976 break;
1977 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1978 break;
1979 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1980 break;
1981 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1982 break;
1983 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1984 break;
1985 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1986 break;
1987 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1988 break;
1989 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1990 break;
1991 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1992 break;
1993 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1994 break;
1995 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1996 break;
1997 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2002 break;
2003 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2004 break;
2005 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2006 break;
2007 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2008 break;
2009 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2010 break;
2011 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2012 break;
2013 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2014 break;
2015 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2016 break;
2017 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2018 break;
2019 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2020 break;
2021 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2022 break;
2023 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2024 break;
2025 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2026 break;
2027 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2028 break;
2029 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2030 break;
2031 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2032 break;
2033 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2034 break;
2035 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2036 break;
2037 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2038 break;
2039 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2040 break;
2041 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2052 break;
2053 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2054 break;
2055 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2056 break;
2057 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2058 break;
2059 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2060 break;
2061 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2062 break;
2063 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2064 break;
2065 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2066 break;
2067 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2068 break;
2069 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2070 break;
2071 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2072 break;
2073 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2074 break;
2075 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2076 break;
2077 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2078 break;
2079 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2080 break;
2081 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2082 break;
2083 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2084 break;
2085 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2086 break;
2087 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2088 break;
2089 }
2090
2091 return ppc64_elf_howto_table[r];
2092 };
2093
2094 /* Set the howto pointer for a PowerPC ELF reloc. */
2095
2096 static void
2097 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2098 Elf_Internal_Rela *dst)
2099 {
2100 unsigned int type;
2101
2102 /* Initialize howto table if needed. */
2103 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2104 ppc_howto_init ();
2105
2106 type = ELF64_R_TYPE (dst->r_info);
2107 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2108 / sizeof (ppc64_elf_howto_table[0])));
2109 cache_ptr->howto = ppc64_elf_howto_table[type];
2110 }
2111
2112 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2113
2114 static bfd_reloc_status_type
2115 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2116 void *data, asection *input_section,
2117 bfd *output_bfd, char **error_message)
2118 {
2119 /* If this is a relocatable link (output_bfd test tells us), just
2120 call the generic function. Any adjustment will be done at final
2121 link time. */
2122 if (output_bfd != NULL)
2123 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2124 input_section, output_bfd, error_message);
2125
2126 /* Adjust the addend for sign extension of the low 16 bits.
2127 We won't actually be using the low 16 bits, so trashing them
2128 doesn't matter. */
2129 reloc_entry->addend += 0x8000;
2130 return bfd_reloc_continue;
2131 }
2132
2133 static bfd_reloc_status_type
2134 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2135 void *data, asection *input_section,
2136 bfd *output_bfd, char **error_message)
2137 {
2138 long insn;
2139 enum elf_ppc64_reloc_type r_type;
2140 bfd_size_type octets;
2141 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2142 bfd_boolean is_power4 = FALSE;
2143
2144 /* If this is a relocatable link (output_bfd test tells us), just
2145 call the generic function. Any adjustment will be done at final
2146 link time. */
2147 if (output_bfd != NULL)
2148 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2149 input_section, output_bfd, error_message);
2150
2151 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2152 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2153 insn &= ~(0x01 << 21);
2154 r_type = reloc_entry->howto->type;
2155 if (r_type == R_PPC64_ADDR14_BRTAKEN
2156 || r_type == R_PPC64_REL14_BRTAKEN)
2157 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2158
2159 if (is_power4)
2160 {
2161 /* Set 'a' bit. This is 0b00010 in BO field for branch
2162 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2163 for branch on CTR insns (BO == 1a00t or 1a01t). */
2164 if ((insn & (0x14 << 21)) == (0x04 << 21))
2165 insn |= 0x02 << 21;
2166 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2167 insn |= 0x08 << 21;
2168 else
2169 return bfd_reloc_continue;
2170 }
2171 else
2172 {
2173 bfd_vma target = 0;
2174 bfd_vma from;
2175
2176 if (!bfd_is_com_section (symbol->section))
2177 target = symbol->value;
2178 target += symbol->section->output_section->vma;
2179 target += symbol->section->output_offset;
2180 target += reloc_entry->addend;
2181
2182 from = (reloc_entry->address
2183 + input_section->output_offset
2184 + input_section->output_section->vma);
2185
2186 /* Invert 'y' bit if not the default. */
2187 if ((bfd_signed_vma) (target - from) < 0)
2188 insn ^= 0x01 << 21;
2189 }
2190 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2191 return bfd_reloc_continue;
2192 }
2193
2194 static bfd_reloc_status_type
2195 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2196 void *data, asection *input_section,
2197 bfd *output_bfd, char **error_message)
2198 {
2199 /* If this is a relocatable link (output_bfd test tells us), just
2200 call the generic function. Any adjustment will be done at final
2201 link time. */
2202 if (output_bfd != NULL)
2203 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2204 input_section, output_bfd, error_message);
2205
2206 /* Subtract the symbol section base address. */
2207 reloc_entry->addend -= symbol->section->output_section->vma;
2208 return bfd_reloc_continue;
2209 }
2210
2211 static bfd_reloc_status_type
2212 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2213 void *data, asection *input_section,
2214 bfd *output_bfd, char **error_message)
2215 {
2216 /* If this is a relocatable link (output_bfd test tells us), just
2217 call the generic function. Any adjustment will be done at final
2218 link time. */
2219 if (output_bfd != NULL)
2220 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2221 input_section, output_bfd, error_message);
2222
2223 /* Subtract the symbol section base address. */
2224 reloc_entry->addend -= symbol->section->output_section->vma;
2225
2226 /* Adjust the addend for sign extension of the low 16 bits. */
2227 reloc_entry->addend += 0x8000;
2228 return bfd_reloc_continue;
2229 }
2230
2231 static bfd_reloc_status_type
2232 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2233 void *data, asection *input_section,
2234 bfd *output_bfd, char **error_message)
2235 {
2236 bfd_vma TOCstart;
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 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2246 if (TOCstart == 0)
2247 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2248
2249 /* Subtract the TOC base address. */
2250 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2251 return bfd_reloc_continue;
2252 }
2253
2254 static bfd_reloc_status_type
2255 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2256 void *data, asection *input_section,
2257 bfd *output_bfd, char **error_message)
2258 {
2259 bfd_vma TOCstart;
2260
2261 /* If this is a relocatable link (output_bfd test tells us), just
2262 call the generic function. Any adjustment will be done at final
2263 link time. */
2264 if (output_bfd != NULL)
2265 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2266 input_section, output_bfd, error_message);
2267
2268 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2269 if (TOCstart == 0)
2270 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2271
2272 /* Subtract the TOC base address. */
2273 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2274
2275 /* Adjust the addend for sign extension of the low 16 bits. */
2276 reloc_entry->addend += 0x8000;
2277 return bfd_reloc_continue;
2278 }
2279
2280 static bfd_reloc_status_type
2281 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2282 void *data, asection *input_section,
2283 bfd *output_bfd, char **error_message)
2284 {
2285 bfd_vma TOCstart;
2286 bfd_size_type octets;
2287
2288 /* If this is a relocatable link (output_bfd test tells us), just
2289 call the generic function. Any adjustment will be done at final
2290 link time. */
2291 if (output_bfd != NULL)
2292 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2293 input_section, output_bfd, error_message);
2294
2295 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2296 if (TOCstart == 0)
2297 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2298
2299 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2300 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2301 return bfd_reloc_ok;
2302 }
2303
2304 static bfd_reloc_status_type
2305 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2306 void *data, asection *input_section,
2307 bfd *output_bfd, char **error_message)
2308 {
2309 /* If this is a relocatable link (output_bfd test tells us), just
2310 call the generic function. Any adjustment will be done at final
2311 link time. */
2312 if (output_bfd != NULL)
2313 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2314 input_section, output_bfd, error_message);
2315
2316 if (error_message != NULL)
2317 {
2318 static char buf[60];
2319 sprintf (buf, "generic linker can't handle %s",
2320 reloc_entry->howto->name);
2321 *error_message = buf;
2322 }
2323 return bfd_reloc_dangerous;
2324 }
2325
2326 struct ppc64_elf_obj_tdata
2327 {
2328 struct elf_obj_tdata elf;
2329
2330 /* Shortcuts to dynamic linker sections. */
2331 asection *got;
2332 asection *relgot;
2333
2334 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2335 sections means we potentially need one of these for each input bfd. */
2336 union {
2337 bfd_signed_vma refcount;
2338 bfd_vma offset;
2339 } tlsld_got;
2340 };
2341
2342 #define ppc64_elf_tdata(bfd) \
2343 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2344
2345 #define ppc64_tlsld_got(bfd) \
2346 (&ppc64_elf_tdata (bfd)->tlsld_got)
2347
2348 /* Override the generic function because we store some extras. */
2349
2350 static bfd_boolean
2351 ppc64_elf_mkobject (bfd *abfd)
2352 {
2353 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2354 abfd->tdata.any = bfd_zalloc (abfd, amt);
2355 if (abfd->tdata.any == NULL)
2356 return FALSE;
2357 return TRUE;
2358 }
2359
2360 /* Fix bad default arch selected for a 64 bit input bfd when the
2361 default is 32 bit. */
2362
2363 static bfd_boolean
2364 ppc64_elf_object_p (bfd *abfd)
2365 {
2366 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2367 {
2368 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2369
2370 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2371 {
2372 /* Relies on arch after 32 bit default being 64 bit default. */
2373 abfd->arch_info = abfd->arch_info->next;
2374 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2375 }
2376 }
2377 return TRUE;
2378 }
2379
2380 /* Support for core dump NOTE sections. */
2381
2382 static bfd_boolean
2383 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2384 {
2385 size_t offset, size;
2386
2387 if (note->descsz != 504)
2388 return FALSE;
2389
2390 /* pr_cursig */
2391 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2392
2393 /* pr_pid */
2394 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2395
2396 /* pr_reg */
2397 offset = 112;
2398 size = 384;
2399
2400 /* Make a ".reg/999" section. */
2401 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2402 size, note->descpos + offset);
2403 }
2404
2405 static bfd_boolean
2406 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2407 {
2408 if (note->descsz != 136)
2409 return FALSE;
2410
2411 elf_tdata (abfd)->core_program
2412 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2413 elf_tdata (abfd)->core_command
2414 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2415
2416 return TRUE;
2417 }
2418
2419 /* Merge backend specific data from an object file to the output
2420 object file when linking. */
2421
2422 static bfd_boolean
2423 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2424 {
2425 /* Check if we have the same endianess. */
2426 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2427 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2428 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2429 {
2430 const char *msg;
2431
2432 if (bfd_big_endian (ibfd))
2433 msg = _("%s: compiled for a big endian system "
2434 "and target is little endian");
2435 else
2436 msg = _("%s: compiled for a little endian system "
2437 "and target is big endian");
2438
2439 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2440
2441 bfd_set_error (bfd_error_wrong_format);
2442 return FALSE;
2443 }
2444
2445 return TRUE;
2446 }
2447
2448 /* Add extra PPC sections. */
2449
2450 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2451 {
2452 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2453 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2454 { ".plt", 4, 0, SHT_NOBITS, 0 },
2455 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2456 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2457 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2458 { NULL, 0, 0, 0, 0 }
2459 };
2460
2461 struct _ppc64_elf_section_data
2462 {
2463 struct bfd_elf_section_data elf;
2464
2465 /* An array with one entry for each opd function descriptor. */
2466 union
2467 {
2468 /* Points to the function code section for local opd entries. */
2469 asection **func_sec;
2470 /* After editing .opd, adjust references to opd local syms. */
2471 long *adjust;
2472 } opd;
2473
2474 /* An array for toc sections, indexed by offset/8.
2475 Specifies the relocation symbol index used at a given toc offset. */
2476 unsigned *t_symndx;
2477 };
2478
2479 #define ppc64_elf_section_data(sec) \
2480 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2481
2482 static bfd_boolean
2483 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2484 {
2485 struct _ppc64_elf_section_data *sdata;
2486 bfd_size_type amt = sizeof (*sdata);
2487
2488 sdata = bfd_zalloc (abfd, amt);
2489 if (sdata == NULL)
2490 return FALSE;
2491 sec->used_by_bfd = sdata;
2492
2493 return _bfd_elf_new_section_hook (abfd, sec);
2494 }
2495 \f
2496 /* The following functions are specific to the ELF linker, while
2497 functions above are used generally. Those named ppc64_elf_* are
2498 called by the main ELF linker code. They appear in this file more
2499 or less in the order in which they are called. eg.
2500 ppc64_elf_check_relocs is called early in the link process,
2501 ppc64_elf_finish_dynamic_sections is one of the last functions
2502 called.
2503
2504 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2505 functions have both a function code symbol and a function descriptor
2506 symbol. A call to foo in a relocatable object file looks like:
2507
2508 . .text
2509 . x:
2510 . bl .foo
2511 . nop
2512
2513 The function definition in another object file might be:
2514
2515 . .section .opd
2516 . foo: .quad .foo
2517 . .quad .TOC.@tocbase
2518 . .quad 0
2519 .
2520 . .text
2521 . .foo: blr
2522
2523 When the linker resolves the call during a static link, the branch
2524 unsurprisingly just goes to .foo and the .opd information is unused.
2525 If the function definition is in a shared library, things are a little
2526 different: The call goes via a plt call stub, the opd information gets
2527 copied to the plt, and the linker patches the nop.
2528
2529 . x:
2530 . bl .foo_stub
2531 . ld 2,40(1)
2532 .
2533 .
2534 . .foo_stub:
2535 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2536 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2537 . std 2,40(1) # this is the general idea
2538 . ld 11,0(12)
2539 . ld 2,8(12)
2540 . mtctr 11
2541 . ld 11,16(12)
2542 . bctr
2543 .
2544 . .section .plt
2545 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2546
2547 The "reloc ()" notation is supposed to indicate that the linker emits
2548 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2549 copying.
2550
2551 What are the difficulties here? Well, firstly, the relocations
2552 examined by the linker in check_relocs are against the function code
2553 sym .foo, while the dynamic relocation in the plt is emitted against
2554 the function descriptor symbol, foo. Somewhere along the line, we need
2555 to carefully copy dynamic link information from one symbol to the other.
2556 Secondly, the generic part of the elf linker will make .foo a dynamic
2557 symbol as is normal for most other backends. We need foo dynamic
2558 instead, at least for an application final link. However, when
2559 creating a shared library containing foo, we need to have both symbols
2560 dynamic so that references to .foo are satisfied during the early
2561 stages of linking. Otherwise the linker might decide to pull in a
2562 definition from some other object, eg. a static library. */
2563
2564 /* The linker needs to keep track of the number of relocs that it
2565 decides to copy as dynamic relocs in check_relocs for each symbol.
2566 This is so that it can later discard them if they are found to be
2567 unnecessary. We store the information in a field extending the
2568 regular ELF linker hash table. */
2569
2570 struct ppc_dyn_relocs
2571 {
2572 struct ppc_dyn_relocs *next;
2573
2574 /* The input section of the reloc. */
2575 asection *sec;
2576
2577 /* Total number of relocs copied for the input section. */
2578 bfd_size_type count;
2579
2580 /* Number of pc-relative relocs copied for the input section. */
2581 bfd_size_type pc_count;
2582 };
2583
2584 /* Track GOT entries needed for a given symbol. We might need more
2585 than one got entry per symbol. */
2586 struct got_entry
2587 {
2588 struct got_entry *next;
2589
2590 /* The symbol addend that we'll be placing in the GOT. */
2591 bfd_vma addend;
2592
2593 /* Unlike other ELF targets, we use separate GOT entries for the same
2594 symbol referenced from different input files. This is to support
2595 automatic multiple TOC/GOT sections, where the TOC base can vary
2596 from one input file to another.
2597
2598 Point to the BFD owning this GOT entry. */
2599 bfd *owner;
2600
2601 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2602 TLS_TPREL or TLS_DTPREL for tls entries. */
2603 char tls_type;
2604
2605 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2606 union
2607 {
2608 bfd_signed_vma refcount;
2609 bfd_vma offset;
2610 } got;
2611 };
2612
2613 /* The same for PLT. */
2614 struct plt_entry
2615 {
2616 struct plt_entry *next;
2617
2618 bfd_vma addend;
2619
2620 union
2621 {
2622 bfd_signed_vma refcount;
2623 bfd_vma offset;
2624 } plt;
2625 };
2626
2627 /* Of those relocs that might be copied as dynamic relocs, this macro
2628 selects those that must be copied when linking a shared library,
2629 even when the symbol is local. */
2630
2631 #define MUST_BE_DYN_RELOC(RTYPE) \
2632 ((RTYPE) != R_PPC64_REL32 \
2633 && (RTYPE) != R_PPC64_REL64 \
2634 && (RTYPE) != R_PPC64_REL30)
2635
2636 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2637 copying dynamic variables from a shared lib into an app's dynbss
2638 section, and instead use a dynamic relocation to point into the
2639 shared lib. With code that gcc generates, it's vital that this be
2640 enabled; In the PowerPC64 ABI, the address of a function is actually
2641 the address of a function descriptor, which resides in the .opd
2642 section. gcc uses the descriptor directly rather than going via the
2643 GOT as some other ABI's do, which means that initialized function
2644 pointers must reference the descriptor. Thus, a function pointer
2645 initialized to the address of a function in a shared library will
2646 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2647 redefines the function descriptor symbol to point to the copy. This
2648 presents a problem as a plt entry for that function is also
2649 initialized from the function descriptor symbol and the copy reloc
2650 may not be initialized first. */
2651 #define ELIMINATE_COPY_RELOCS 1
2652
2653 /* Section name for stubs is the associated section name plus this
2654 string. */
2655 #define STUB_SUFFIX ".stub"
2656
2657 /* Linker stubs.
2658 ppc_stub_long_branch:
2659 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2660 destination, but a 24 bit branch in a stub section will reach.
2661 . b dest
2662
2663 ppc_stub_plt_branch:
2664 Similar to the above, but a 24 bit branch in the stub section won't
2665 reach its destination.
2666 . addis %r12,%r2,xxx@toc@ha
2667 . ld %r11,xxx@toc@l(%r12)
2668 . mtctr %r11
2669 . bctr
2670
2671 ppc_stub_plt_call:
2672 Used to call a function in a shared library. If it so happens that
2673 the plt entry referenced crosses a 64k boundary, then an extra
2674 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
2675 xxx+16 as appropriate.
2676 . addis %r12,%r2,xxx@toc@ha
2677 . std %r2,40(%r1)
2678 . ld %r11,xxx+0@toc@l(%r12)
2679 . ld %r2,xxx+8@toc@l(%r12)
2680 . mtctr %r11
2681 . ld %r11,xxx+16@toc@l(%r12)
2682 . bctr
2683
2684 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2685 code to adjust the value and save r2 to support multiple toc sections.
2686 A ppc_stub_long_branch with an r2 offset looks like:
2687 . std %r2,40(%r1)
2688 . addis %r2,%r2,off@ha
2689 . addi %r2,%r2,off@l
2690 . b dest
2691
2692 A ppc_stub_plt_branch with an r2 offset looks like:
2693 . std %r2,40(%r1)
2694 . addis %r12,%r2,xxx@toc@ha
2695 . ld %r11,xxx@toc@l(%r12)
2696 . addis %r2,%r2,off@ha
2697 . addi %r2,%r2,off@l
2698 . mtctr %r11
2699 . bctr
2700 */
2701
2702 enum ppc_stub_type {
2703 ppc_stub_none,
2704 ppc_stub_long_branch,
2705 ppc_stub_long_branch_r2off,
2706 ppc_stub_plt_branch,
2707 ppc_stub_plt_branch_r2off,
2708 ppc_stub_plt_call
2709 };
2710
2711 struct ppc_stub_hash_entry {
2712
2713 /* Base hash table entry structure. */
2714 struct bfd_hash_entry root;
2715
2716 enum ppc_stub_type stub_type;
2717
2718 /* The stub section. */
2719 asection *stub_sec;
2720
2721 /* Offset within stub_sec of the beginning of this stub. */
2722 bfd_vma stub_offset;
2723
2724 /* Given the symbol's value and its section we can determine its final
2725 value when building the stubs (so the stub knows where to jump. */
2726 bfd_vma target_value;
2727 asection *target_section;
2728
2729 /* The symbol table entry, if any, that this was derived from. */
2730 struct ppc_link_hash_entry *h;
2731
2732 /* And the reloc addend that this was derived from. */
2733 bfd_vma addend;
2734
2735 /* Where this stub is being called from, or, in the case of combined
2736 stub sections, the first input section in the group. */
2737 asection *id_sec;
2738 };
2739
2740 struct ppc_branch_hash_entry {
2741
2742 /* Base hash table entry structure. */
2743 struct bfd_hash_entry root;
2744
2745 /* Offset within .branch_lt. */
2746 unsigned int offset;
2747
2748 /* Generation marker. */
2749 unsigned int iter;
2750 };
2751
2752 struct ppc_link_hash_entry
2753 {
2754 struct elf_link_hash_entry elf;
2755
2756 /* A pointer to the most recently used stub hash entry against this
2757 symbol. */
2758 struct ppc_stub_hash_entry *stub_cache;
2759
2760 /* Track dynamic relocs copied for this symbol. */
2761 struct ppc_dyn_relocs *dyn_relocs;
2762
2763 /* Link between function code and descriptor symbols. */
2764 struct elf_link_hash_entry *oh;
2765
2766 /* Flag function code and descriptor symbols. */
2767 unsigned int is_func:1;
2768 unsigned int is_func_descriptor:1;
2769 unsigned int is_entry:1;
2770
2771 /* Whether global opd sym has been adjusted or not. */
2772 unsigned int adjust_done:1;
2773
2774 /* Contexts in which symbol is used in the GOT (or TOC).
2775 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2776 corresponding relocs are encountered during check_relocs.
2777 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2778 indicate the corresponding GOT entry type is not needed.
2779 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2780 a TPREL one. We use a separate flag rather than setting TPREL
2781 just for convenience in distinguishing the two cases. */
2782 #define TLS_GD 1 /* GD reloc. */
2783 #define TLS_LD 2 /* LD reloc. */
2784 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2785 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2786 #define TLS_TLS 16 /* Any TLS reloc. */
2787 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2788 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2789 char tls_mask;
2790 };
2791
2792 /* ppc64 ELF linker hash table. */
2793
2794 struct ppc_link_hash_table
2795 {
2796 struct elf_link_hash_table elf;
2797
2798 /* The stub hash table. */
2799 struct bfd_hash_table stub_hash_table;
2800
2801 /* Another hash table for plt_branch stubs. */
2802 struct bfd_hash_table branch_hash_table;
2803
2804 /* Linker stub bfd. */
2805 bfd *stub_bfd;
2806
2807 /* Linker call-backs. */
2808 asection * (*add_stub_section) (const char *, asection *);
2809 void (*layout_sections_again) (void);
2810
2811 /* Array to keep track of which stub sections have been created, and
2812 information on stub grouping. */
2813 struct map_stub {
2814 /* This is the section to which stubs in the group will be attached. */
2815 asection *link_sec;
2816 /* The stub section. */
2817 asection *stub_sec;
2818 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2819 bfd_vma toc_off;
2820 } *stub_group;
2821
2822 /* Support for multiple toc sections. */
2823 unsigned int no_multi_toc;
2824 unsigned int multi_toc_needed;
2825
2826 /* Temp used when calculating TOC pointers. */
2827 bfd_vma toc_curr;
2828
2829 /* Highest input section id. */
2830 int top_id;
2831
2832 /* Highest output section index. */
2833 int top_index;
2834
2835 /* List of input sections for each output section. */
2836 asection **input_list;
2837
2838 /* Short-cuts to get to dynamic linker sections. */
2839 asection *got;
2840 asection *plt;
2841 asection *relplt;
2842 asection *dynbss;
2843 asection *relbss;
2844 asection *glink;
2845 asection *sfpr;
2846 asection *brlt;
2847 asection *relbrlt;
2848
2849 /* Shortcut to .__tls_get_addr. */
2850 struct elf_link_hash_entry *tls_get_addr;
2851
2852 /* Statistics. */
2853 unsigned long stub_count[ppc_stub_plt_call];
2854
2855 /* Set if we should emit symbols for stubs. */
2856 unsigned int emit_stub_syms;
2857
2858 /* Set on error. */
2859 unsigned int stub_error;
2860
2861 /* Flag set when small branches are detected. Used to
2862 select suitable defaults for the stub group size. */
2863 unsigned int has_14bit_branch;
2864
2865 /* Set if we detect a reference undefined weak symbol. */
2866 unsigned int have_undefweak;
2867
2868 /* Incremented every time we size stubs. */
2869 unsigned int stub_iteration;
2870
2871 /* Small local sym to section mapping cache. */
2872 struct sym_sec_cache sym_sec;
2873 };
2874
2875 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2876
2877 #define ppc_hash_table(p) \
2878 ((struct ppc_link_hash_table *) ((p)->hash))
2879
2880 #define ppc_stub_hash_lookup(table, string, create, copy) \
2881 ((struct ppc_stub_hash_entry *) \
2882 bfd_hash_lookup ((table), (string), (create), (copy)))
2883
2884 #define ppc_branch_hash_lookup(table, string, create, copy) \
2885 ((struct ppc_branch_hash_entry *) \
2886 bfd_hash_lookup ((table), (string), (create), (copy)))
2887
2888 /* Create an entry in the stub hash table. */
2889
2890 static struct bfd_hash_entry *
2891 stub_hash_newfunc (struct bfd_hash_entry *entry,
2892 struct bfd_hash_table *table,
2893 const char *string)
2894 {
2895 /* Allocate the structure if it has not already been allocated by a
2896 subclass. */
2897 if (entry == NULL)
2898 {
2899 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2900 if (entry == NULL)
2901 return entry;
2902 }
2903
2904 /* Call the allocation method of the superclass. */
2905 entry = bfd_hash_newfunc (entry, table, string);
2906 if (entry != NULL)
2907 {
2908 struct ppc_stub_hash_entry *eh;
2909
2910 /* Initialize the local fields. */
2911 eh = (struct ppc_stub_hash_entry *) entry;
2912 eh->stub_type = ppc_stub_none;
2913 eh->stub_sec = NULL;
2914 eh->stub_offset = 0;
2915 eh->target_value = 0;
2916 eh->target_section = NULL;
2917 eh->h = NULL;
2918 eh->id_sec = NULL;
2919 }
2920
2921 return entry;
2922 }
2923
2924 /* Create an entry in the branch hash table. */
2925
2926 static struct bfd_hash_entry *
2927 branch_hash_newfunc (struct bfd_hash_entry *entry,
2928 struct bfd_hash_table *table,
2929 const char *string)
2930 {
2931 /* Allocate the structure if it has not already been allocated by a
2932 subclass. */
2933 if (entry == NULL)
2934 {
2935 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2936 if (entry == NULL)
2937 return entry;
2938 }
2939
2940 /* Call the allocation method of the superclass. */
2941 entry = bfd_hash_newfunc (entry, table, string);
2942 if (entry != NULL)
2943 {
2944 struct ppc_branch_hash_entry *eh;
2945
2946 /* Initialize the local fields. */
2947 eh = (struct ppc_branch_hash_entry *) entry;
2948 eh->offset = 0;
2949 eh->iter = 0;
2950 }
2951
2952 return entry;
2953 }
2954
2955 /* Create an entry in a ppc64 ELF linker hash table. */
2956
2957 static struct bfd_hash_entry *
2958 link_hash_newfunc (struct bfd_hash_entry *entry,
2959 struct bfd_hash_table *table,
2960 const char *string)
2961 {
2962 /* Allocate the structure if it has not already been allocated by a
2963 subclass. */
2964 if (entry == NULL)
2965 {
2966 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2967 if (entry == NULL)
2968 return entry;
2969 }
2970
2971 /* Call the allocation method of the superclass. */
2972 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2973 if (entry != NULL)
2974 {
2975 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2976
2977 eh->stub_cache = NULL;
2978 eh->dyn_relocs = NULL;
2979 eh->oh = NULL;
2980 eh->is_func = 0;
2981 eh->is_func_descriptor = 0;
2982 eh->is_entry = 0;
2983 eh->adjust_done = 0;
2984 eh->tls_mask = 0;
2985 }
2986
2987 return entry;
2988 }
2989
2990 /* Create a ppc64 ELF linker hash table. */
2991
2992 static struct bfd_link_hash_table *
2993 ppc64_elf_link_hash_table_create (bfd *abfd)
2994 {
2995 struct ppc_link_hash_table *htab;
2996 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2997
2998 htab = bfd_zmalloc (amt);
2999 if (htab == NULL)
3000 return NULL;
3001
3002 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3003 {
3004 free (htab);
3005 return NULL;
3006 }
3007
3008 /* Init the stub hash table too. */
3009 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3010 return NULL;
3011
3012 /* And the branch hash table. */
3013 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3014 return NULL;
3015
3016 /* Initializing two fields of the union is just cosmetic. We really
3017 only care about glist, but when compiled on a 32-bit host the
3018 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3019 debugger inspection of these fields look nicer. */
3020 htab->elf.init_refcount.refcount = 0;
3021 htab->elf.init_refcount.glist = NULL;
3022 htab->elf.init_offset.offset = 0;
3023 htab->elf.init_offset.glist = NULL;
3024
3025 return &htab->elf.root;
3026 }
3027
3028 /* Free the derived linker hash table. */
3029
3030 static void
3031 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3032 {
3033 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3034
3035 bfd_hash_table_free (&ret->stub_hash_table);
3036 bfd_hash_table_free (&ret->branch_hash_table);
3037 _bfd_generic_link_hash_table_free (hash);
3038 }
3039
3040 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3041
3042 void
3043 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3044 {
3045 struct ppc_link_hash_table *htab;
3046
3047 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3048
3049 /* Always hook our dynamic sections into the first bfd, which is the
3050 linker created stub bfd. This ensures that the GOT header is at
3051 the start of the output TOC section. */
3052 htab = ppc_hash_table (info);
3053 htab->stub_bfd = abfd;
3054 htab->elf.dynobj = abfd;
3055 }
3056
3057 /* Build a name for an entry in the stub hash table. */
3058
3059 static char *
3060 ppc_stub_name (const asection *input_section,
3061 const asection *sym_sec,
3062 const struct ppc_link_hash_entry *h,
3063 const Elf_Internal_Rela *rel)
3064 {
3065 char *stub_name;
3066 bfd_size_type len;
3067
3068 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3069 offsets from a sym as a branch target? In fact, we could
3070 probably assume the addend is always zero. */
3071 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3072
3073 if (h)
3074 {
3075 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3076 stub_name = bfd_malloc (len);
3077 if (stub_name != NULL)
3078 {
3079 sprintf (stub_name, "%08x.%s+%x",
3080 input_section->id & 0xffffffff,
3081 h->elf.root.root.string,
3082 (int) rel->r_addend & 0xffffffff);
3083 }
3084 }
3085 else
3086 {
3087 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3088 stub_name = bfd_malloc (len);
3089 if (stub_name != NULL)
3090 {
3091 sprintf (stub_name, "%08x.%x:%x+%x",
3092 input_section->id & 0xffffffff,
3093 sym_sec->id & 0xffffffff,
3094 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3095 (int) rel->r_addend & 0xffffffff);
3096 }
3097 }
3098 return stub_name;
3099 }
3100
3101 /* Look up an entry in the stub hash. Stub entries are cached because
3102 creating the stub name takes a bit of time. */
3103
3104 static struct ppc_stub_hash_entry *
3105 ppc_get_stub_entry (const asection *input_section,
3106 const asection *sym_sec,
3107 struct elf_link_hash_entry *hash,
3108 const Elf_Internal_Rela *rel,
3109 struct ppc_link_hash_table *htab)
3110 {
3111 struct ppc_stub_hash_entry *stub_entry;
3112 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3113 const asection *id_sec;
3114
3115 /* If this input section is part of a group of sections sharing one
3116 stub section, then use the id of the first section in the group.
3117 Stub names need to include a section id, as there may well be
3118 more than one stub used to reach say, printf, and we need to
3119 distinguish between them. */
3120 id_sec = htab->stub_group[input_section->id].link_sec;
3121
3122 if (h != NULL && h->stub_cache != NULL
3123 && h->stub_cache->h == h
3124 && h->stub_cache->id_sec == id_sec)
3125 {
3126 stub_entry = h->stub_cache;
3127 }
3128 else
3129 {
3130 char *stub_name;
3131
3132 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3133 if (stub_name == NULL)
3134 return NULL;
3135
3136 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3137 stub_name, FALSE, FALSE);
3138 if (h != NULL)
3139 h->stub_cache = stub_entry;
3140
3141 free (stub_name);
3142 }
3143
3144 return stub_entry;
3145 }
3146
3147 /* Add a new stub entry to the stub hash. Not all fields of the new
3148 stub entry are initialised. */
3149
3150 static struct ppc_stub_hash_entry *
3151 ppc_add_stub (const char *stub_name,
3152 asection *section,
3153 struct ppc_link_hash_table *htab)
3154 {
3155 asection *link_sec;
3156 asection *stub_sec;
3157 struct ppc_stub_hash_entry *stub_entry;
3158
3159 link_sec = htab->stub_group[section->id].link_sec;
3160 stub_sec = htab->stub_group[section->id].stub_sec;
3161 if (stub_sec == NULL)
3162 {
3163 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3164 if (stub_sec == NULL)
3165 {
3166 size_t namelen;
3167 bfd_size_type len;
3168 char *s_name;
3169
3170 namelen = strlen (link_sec->name);
3171 len = namelen + sizeof (STUB_SUFFIX);
3172 s_name = bfd_alloc (htab->stub_bfd, len);
3173 if (s_name == NULL)
3174 return NULL;
3175
3176 memcpy (s_name, link_sec->name, namelen);
3177 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3178 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3179 if (stub_sec == NULL)
3180 return NULL;
3181 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3182 }
3183 htab->stub_group[section->id].stub_sec = stub_sec;
3184 }
3185
3186 /* Enter this entry into the linker stub hash table. */
3187 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3188 TRUE, FALSE);
3189 if (stub_entry == NULL)
3190 {
3191 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3192 bfd_archive_filename (section->owner),
3193 stub_name);
3194 return NULL;
3195 }
3196
3197 stub_entry->stub_sec = stub_sec;
3198 stub_entry->stub_offset = 0;
3199 stub_entry->id_sec = link_sec;
3200 return stub_entry;
3201 }
3202
3203 /* Create sections for linker generated code. */
3204
3205 static bfd_boolean
3206 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3207 {
3208 struct ppc_link_hash_table *htab;
3209 flagword flags;
3210
3211 htab = ppc_hash_table (info);
3212
3213 /* Create .sfpr for code to save and restore fp regs. */
3214 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3215 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3216 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3217 if (htab->sfpr == NULL
3218 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3219 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3220 return FALSE;
3221
3222 /* Create .glink for lazy dynamic linking support. */
3223 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3224 if (htab->glink == NULL
3225 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3226 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3227 return FALSE;
3228
3229 /* Create .branch_lt for plt_branch stubs. */
3230 flags = (SEC_ALLOC | SEC_LOAD
3231 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3232 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3233 if (htab->brlt == NULL
3234 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3235 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3236 return FALSE;
3237
3238 if (info->shared)
3239 {
3240 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3241 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3242 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3243 if (!htab->relbrlt
3244 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3245 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3246 return FALSE;
3247 }
3248 return TRUE;
3249 }
3250
3251 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3252 not already done. */
3253
3254 static bfd_boolean
3255 create_got_section (bfd *abfd, struct bfd_link_info *info)
3256 {
3257 asection *got, *relgot;
3258 flagword flags;
3259 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3260
3261 if (!htab->got)
3262 {
3263 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3264 return FALSE;
3265
3266 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3267 if (!htab->got)
3268 abort ();
3269 }
3270
3271 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3272 | SEC_LINKER_CREATED);
3273
3274 got = bfd_make_section (abfd, ".got");
3275 if (!got
3276 || !bfd_set_section_flags (abfd, got, flags)
3277 || !bfd_set_section_alignment (abfd, got, 3))
3278 return FALSE;
3279
3280 relgot = bfd_make_section (abfd, ".rela.got");
3281 if (!relgot
3282 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3283 || ! bfd_set_section_alignment (abfd, relgot, 3))
3284 return FALSE;
3285
3286 ppc64_elf_tdata (abfd)->got = got;
3287 ppc64_elf_tdata (abfd)->relgot = relgot;
3288 return TRUE;
3289 }
3290
3291 /* Create the dynamic sections, and set up shortcuts. */
3292
3293 static bfd_boolean
3294 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3295 {
3296 struct ppc_link_hash_table *htab;
3297
3298 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3299 return FALSE;
3300
3301 htab = ppc_hash_table (info);
3302 if (!htab->got)
3303 htab->got = bfd_get_section_by_name (dynobj, ".got");
3304 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3305 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3306 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3307 if (!info->shared)
3308 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3309
3310 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3311 || (!info->shared && !htab->relbss))
3312 abort ();
3313
3314 return TRUE;
3315 }
3316
3317 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3318
3319 static void
3320 ppc64_elf_copy_indirect_symbol
3321 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3322 struct elf_link_hash_entry *dir,
3323 struct elf_link_hash_entry *ind)
3324 {
3325 struct ppc_link_hash_entry *edir, *eind;
3326 flagword mask;
3327
3328 edir = (struct ppc_link_hash_entry *) dir;
3329 eind = (struct ppc_link_hash_entry *) ind;
3330
3331 /* Copy over any dynamic relocs we may have on the indirect sym. */
3332 if (eind->dyn_relocs != NULL)
3333 {
3334 if (edir->dyn_relocs != NULL)
3335 {
3336 struct ppc_dyn_relocs **pp;
3337 struct ppc_dyn_relocs *p;
3338
3339 if (eind->elf.root.type == bfd_link_hash_indirect)
3340 abort ();
3341
3342 /* Add reloc counts against the weak sym to the strong sym
3343 list. Merge any entries against the same section. */
3344 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3345 {
3346 struct ppc_dyn_relocs *q;
3347
3348 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3349 if (q->sec == p->sec)
3350 {
3351 q->pc_count += p->pc_count;
3352 q->count += p->count;
3353 *pp = p->next;
3354 break;
3355 }
3356 if (q == NULL)
3357 pp = &p->next;
3358 }
3359 *pp = edir->dyn_relocs;
3360 }
3361
3362 edir->dyn_relocs = eind->dyn_relocs;
3363 eind->dyn_relocs = NULL;
3364 }
3365
3366 edir->is_func |= eind->is_func;
3367 edir->is_func_descriptor |= eind->is_func_descriptor;
3368 edir->is_entry |= eind->is_entry;
3369 edir->tls_mask |= eind->tls_mask;
3370
3371 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3372 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF
3373 | ELF_LINK_HASH_NEEDS_PLT);
3374 /* If called to transfer flags for a weakdef during processing
3375 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3376 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3377 if (ELIMINATE_COPY_RELOCS
3378 && eind->elf.root.type != bfd_link_hash_indirect
3379 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3380 mask &= ~ELF_LINK_NON_GOT_REF;
3381
3382 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3383
3384 /* If we were called to copy over info for a weak sym, that's all. */
3385 if (eind->elf.root.type != bfd_link_hash_indirect)
3386 return;
3387
3388 /* Copy over got entries that we may have already seen to the
3389 symbol which just became indirect. */
3390 if (eind->elf.got.glist != NULL)
3391 {
3392 if (edir->elf.got.glist != NULL)
3393 {
3394 struct got_entry **entp;
3395 struct got_entry *ent;
3396
3397 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3398 {
3399 struct got_entry *dent;
3400
3401 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3402 if (dent->addend == ent->addend
3403 && dent->owner == ent->owner
3404 && dent->tls_type == ent->tls_type)
3405 {
3406 dent->got.refcount += ent->got.refcount;
3407 *entp = ent->next;
3408 break;
3409 }
3410 if (dent == NULL)
3411 entp = &ent->next;
3412 }
3413 *entp = edir->elf.got.glist;
3414 }
3415
3416 edir->elf.got.glist = eind->elf.got.glist;
3417 eind->elf.got.glist = NULL;
3418 }
3419
3420 /* And plt entries. */
3421 if (eind->elf.plt.plist != NULL)
3422 {
3423 if (edir->elf.plt.plist != NULL)
3424 {
3425 struct plt_entry **entp;
3426 struct plt_entry *ent;
3427
3428 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3429 {
3430 struct plt_entry *dent;
3431
3432 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3433 if (dent->addend == ent->addend)
3434 {
3435 dent->plt.refcount += ent->plt.refcount;
3436 *entp = ent->next;
3437 break;
3438 }
3439 if (dent == NULL)
3440 entp = &ent->next;
3441 }
3442 *entp = edir->elf.plt.plist;
3443 }
3444
3445 edir->elf.plt.plist = eind->elf.plt.plist;
3446 eind->elf.plt.plist = NULL;
3447 }
3448
3449 if (edir->elf.dynindx == -1)
3450 {
3451 edir->elf.dynindx = eind->elf.dynindx;
3452 edir->elf.dynstr_index = eind->elf.dynstr_index;
3453 eind->elf.dynindx = -1;
3454 eind->elf.dynstr_index = 0;
3455 }
3456 else
3457 BFD_ASSERT (eind->elf.dynindx == -1);
3458 }
3459
3460 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3461 symbols undefined on the command-line. */
3462
3463 bfd_boolean
3464 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3465 {
3466 struct ppc_link_hash_table *htab;
3467 struct bfd_sym_chain *sym;
3468
3469 htab = ppc_hash_table (info);
3470 for (sym = info->gc_sym_list; sym; sym = sym->next)
3471 {
3472 struct elf_link_hash_entry *h;
3473
3474 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3475 if (h != NULL)
3476 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3477 }
3478 return TRUE;
3479 }
3480
3481 /* Hack symbols defined in .opd sections to be function type. */
3482
3483 static bfd_boolean
3484 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
3485 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3486 Elf_Internal_Sym *isym,
3487 const char **name ATTRIBUTE_UNUSED,
3488 flagword *flags ATTRIBUTE_UNUSED,
3489 asection **sec,
3490 bfd_vma *value ATTRIBUTE_UNUSED)
3491 {
3492 if (strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
3493 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
3494 return TRUE;
3495 }
3496
3497 static bfd_boolean
3498 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3499 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3500 {
3501 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3502 char *local_got_tls_masks;
3503
3504 if (local_got_ents == NULL)
3505 {
3506 bfd_size_type size = symtab_hdr->sh_info;
3507
3508 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3509 local_got_ents = bfd_zalloc (abfd, size);
3510 if (local_got_ents == NULL)
3511 return FALSE;
3512 elf_local_got_ents (abfd) = local_got_ents;
3513 }
3514
3515 if ((tls_type & TLS_EXPLICIT) == 0)
3516 {
3517 struct got_entry *ent;
3518
3519 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3520 if (ent->addend == r_addend
3521 && ent->owner == abfd
3522 && ent->tls_type == tls_type)
3523 break;
3524 if (ent == NULL)
3525 {
3526 bfd_size_type amt = sizeof (*ent);
3527 ent = bfd_alloc (abfd, amt);
3528 if (ent == NULL)
3529 return FALSE;
3530 ent->next = local_got_ents[r_symndx];
3531 ent->addend = r_addend;
3532 ent->owner = abfd;
3533 ent->tls_type = tls_type;
3534 ent->got.refcount = 0;
3535 local_got_ents[r_symndx] = ent;
3536 }
3537 ent->got.refcount += 1;
3538 }
3539
3540 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3541 local_got_tls_masks[r_symndx] |= tls_type;
3542 return TRUE;
3543 }
3544
3545 static bfd_boolean
3546 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3547 {
3548 struct plt_entry *ent;
3549
3550 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3551 if (ent->addend == addend)
3552 break;
3553 if (ent == NULL)
3554 {
3555 bfd_size_type amt = sizeof (*ent);
3556 ent = bfd_alloc (abfd, amt);
3557 if (ent == NULL)
3558 return FALSE;
3559 ent->next = eh->elf.plt.plist;
3560 ent->addend = addend;
3561 ent->plt.refcount = 0;
3562 eh->elf.plt.plist = ent;
3563 }
3564 ent->plt.refcount += 1;
3565 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3566 eh->is_func = 1;
3567 return TRUE;
3568 }
3569
3570 /* Find the function descriptor hash entry from the given function code
3571 hash entry FH. Link the entries via their OH fields. */
3572 static struct ppc_link_hash_entry *
3573 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3574 {
3575 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh;
3576
3577 if (fdh == NULL)
3578 {
3579 const char *fd_name = fh->elf.root.root.string + 1;
3580
3581 fdh = (struct ppc_link_hash_entry *)
3582 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3583 if (fdh != NULL)
3584 {
3585 fdh->is_func_descriptor = 1;
3586 fdh->oh = &fh->elf;
3587 fh->is_func = 1;
3588 fh->oh = &fdh->elf;
3589 }
3590 }
3591
3592 return fdh;
3593 }
3594
3595 /* Look through the relocs for a section during the first phase, and
3596 calculate needed space in the global offset table, procedure
3597 linkage table, and dynamic reloc sections. */
3598
3599 static bfd_boolean
3600 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3601 asection *sec, const Elf_Internal_Rela *relocs)
3602 {
3603 struct ppc_link_hash_table *htab;
3604 Elf_Internal_Shdr *symtab_hdr;
3605 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3606 const Elf_Internal_Rela *rel;
3607 const Elf_Internal_Rela *rel_end;
3608 asection *sreloc;
3609 asection **opd_sym_map;
3610
3611 if (info->relocatable)
3612 return TRUE;
3613
3614 /* Don't do anything special with non-loaded, non-alloced sections.
3615 In particular, any relocs in such sections should not affect GOT
3616 and PLT reference counting (ie. we don't allow them to create GOT
3617 or PLT entries), there's no possibility or desire to optimize TLS
3618 relocs, and there's not much point in propagating relocs to shared
3619 libs that the dynamic linker won't relocate. */
3620 if ((sec->flags & SEC_ALLOC) == 0)
3621 return TRUE;
3622
3623 htab = ppc_hash_table (info);
3624 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3625
3626 sym_hashes = elf_sym_hashes (abfd);
3627 sym_hashes_end = (sym_hashes
3628 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3629 - symtab_hdr->sh_info);
3630
3631 sreloc = NULL;
3632 opd_sym_map = NULL;
3633 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3634 {
3635 /* Garbage collection needs some extra help with .opd sections.
3636 We don't want to necessarily keep everything referenced by
3637 relocs in .opd, as that would keep all functions. Instead,
3638 if we reference an .opd symbol (a function descriptor), we
3639 want to keep the function code symbol's section. This is
3640 easy for global symbols, but for local syms we need to keep
3641 information about the associated function section. Later, if
3642 edit_opd deletes entries, we'll use this array to adjust
3643 local syms in .opd. */
3644 union opd_info {
3645 asection *func_section;
3646 long entry_adjust;
3647 };
3648 bfd_size_type amt;
3649
3650 amt = sec->size * sizeof (union opd_info) / 24;
3651 opd_sym_map = bfd_zalloc (abfd, amt);
3652 if (opd_sym_map == NULL)
3653 return FALSE;
3654 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3655 }
3656
3657 if (htab->sfpr == NULL
3658 && !create_linkage_sections (htab->elf.dynobj, info))
3659 return FALSE;
3660
3661 rel_end = relocs + sec->reloc_count;
3662 for (rel = relocs; rel < rel_end; rel++)
3663 {
3664 unsigned long r_symndx;
3665 struct elf_link_hash_entry *h;
3666 enum elf_ppc64_reloc_type r_type;
3667 int tls_type = 0;
3668
3669 r_symndx = ELF64_R_SYM (rel->r_info);
3670 if (r_symndx < symtab_hdr->sh_info)
3671 h = NULL;
3672 else
3673 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3674
3675 r_type = ELF64_R_TYPE (rel->r_info);
3676 switch (r_type)
3677 {
3678 case R_PPC64_GOT_TLSLD16:
3679 case R_PPC64_GOT_TLSLD16_LO:
3680 case R_PPC64_GOT_TLSLD16_HI:
3681 case R_PPC64_GOT_TLSLD16_HA:
3682 ppc64_tlsld_got (abfd)->refcount += 1;
3683 tls_type = TLS_TLS | TLS_LD;
3684 goto dogottls;
3685
3686 case R_PPC64_GOT_TLSGD16:
3687 case R_PPC64_GOT_TLSGD16_LO:
3688 case R_PPC64_GOT_TLSGD16_HI:
3689 case R_PPC64_GOT_TLSGD16_HA:
3690 tls_type = TLS_TLS | TLS_GD;
3691 goto dogottls;
3692
3693 case R_PPC64_GOT_TPREL16_DS:
3694 case R_PPC64_GOT_TPREL16_LO_DS:
3695 case R_PPC64_GOT_TPREL16_HI:
3696 case R_PPC64_GOT_TPREL16_HA:
3697 if (info->shared)
3698 info->flags |= DF_STATIC_TLS;
3699 tls_type = TLS_TLS | TLS_TPREL;
3700 goto dogottls;
3701
3702 case R_PPC64_GOT_DTPREL16_DS:
3703 case R_PPC64_GOT_DTPREL16_LO_DS:
3704 case R_PPC64_GOT_DTPREL16_HI:
3705 case R_PPC64_GOT_DTPREL16_HA:
3706 tls_type = TLS_TLS | TLS_DTPREL;
3707 dogottls:
3708 sec->has_tls_reloc = 1;
3709 /* Fall thru */
3710
3711 case R_PPC64_GOT16:
3712 case R_PPC64_GOT16_DS:
3713 case R_PPC64_GOT16_HA:
3714 case R_PPC64_GOT16_HI:
3715 case R_PPC64_GOT16_LO:
3716 case R_PPC64_GOT16_LO_DS:
3717 /* This symbol requires a global offset table entry. */
3718 sec->has_gp_reloc = 1;
3719 if (ppc64_elf_tdata (abfd)->got == NULL
3720 && !create_got_section (abfd, info))
3721 return FALSE;
3722
3723 if (h != NULL)
3724 {
3725 struct ppc_link_hash_entry *eh;
3726 struct got_entry *ent;
3727
3728 eh = (struct ppc_link_hash_entry *) h;
3729 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3730 if (ent->addend == rel->r_addend
3731 && ent->owner == abfd
3732 && ent->tls_type == tls_type)
3733 break;
3734 if (ent == NULL)
3735 {
3736 bfd_size_type amt = sizeof (*ent);
3737 ent = bfd_alloc (abfd, amt);
3738 if (ent == NULL)
3739 return FALSE;
3740 ent->next = eh->elf.got.glist;
3741 ent->addend = rel->r_addend;
3742 ent->owner = abfd;
3743 ent->tls_type = tls_type;
3744 ent->got.refcount = 0;
3745 eh->elf.got.glist = ent;
3746 }
3747 ent->got.refcount += 1;
3748 eh->tls_mask |= tls_type;
3749 }
3750 else
3751 /* This is a global offset table entry for a local symbol. */
3752 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3753 rel->r_addend, tls_type))
3754 return FALSE;
3755 break;
3756
3757 case R_PPC64_PLT16_HA:
3758 case R_PPC64_PLT16_HI:
3759 case R_PPC64_PLT16_LO:
3760 case R_PPC64_PLT32:
3761 case R_PPC64_PLT64:
3762 /* This symbol requires a procedure linkage table entry. We
3763 actually build the entry in adjust_dynamic_symbol,
3764 because this might be a case of linking PIC code without
3765 linking in any dynamic objects, in which case we don't
3766 need to generate a procedure linkage table after all. */
3767 if (h == NULL)
3768 {
3769 /* It does not make sense to have a procedure linkage
3770 table entry for a local symbol. */
3771 bfd_set_error (bfd_error_bad_value);
3772 return FALSE;
3773 }
3774 else
3775 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3776 rel->r_addend))
3777 return FALSE;
3778 break;
3779
3780 /* The following relocations don't need to propagate the
3781 relocation if linking a shared object since they are
3782 section relative. */
3783 case R_PPC64_SECTOFF:
3784 case R_PPC64_SECTOFF_LO:
3785 case R_PPC64_SECTOFF_HI:
3786 case R_PPC64_SECTOFF_HA:
3787 case R_PPC64_SECTOFF_DS:
3788 case R_PPC64_SECTOFF_LO_DS:
3789 case R_PPC64_DTPREL16:
3790 case R_PPC64_DTPREL16_LO:
3791 case R_PPC64_DTPREL16_HI:
3792 case R_PPC64_DTPREL16_HA:
3793 case R_PPC64_DTPREL16_DS:
3794 case R_PPC64_DTPREL16_LO_DS:
3795 case R_PPC64_DTPREL16_HIGHER:
3796 case R_PPC64_DTPREL16_HIGHERA:
3797 case R_PPC64_DTPREL16_HIGHEST:
3798 case R_PPC64_DTPREL16_HIGHESTA:
3799 break;
3800
3801 /* Nor do these. */
3802 case R_PPC64_TOC16:
3803 case R_PPC64_TOC16_LO:
3804 case R_PPC64_TOC16_HI:
3805 case R_PPC64_TOC16_HA:
3806 case R_PPC64_TOC16_DS:
3807 case R_PPC64_TOC16_LO_DS:
3808 sec->has_gp_reloc = 1;
3809 break;
3810
3811 /* This relocation describes the C++ object vtable hierarchy.
3812 Reconstruct it for later use during GC. */
3813 case R_PPC64_GNU_VTINHERIT:
3814 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3815 return FALSE;
3816 break;
3817
3818 /* This relocation describes which C++ vtable entries are actually
3819 used. Record for later use during GC. */
3820 case R_PPC64_GNU_VTENTRY:
3821 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3822 return FALSE;
3823 break;
3824
3825 case R_PPC64_REL14:
3826 case R_PPC64_REL14_BRTAKEN:
3827 case R_PPC64_REL14_BRNTAKEN:
3828 htab->has_14bit_branch = 1;
3829 /* Fall through. */
3830
3831 case R_PPC64_REL24:
3832 if (h != NULL
3833 && h->root.root.string[0] == '.'
3834 && h->root.root.string[1] != 0)
3835 {
3836 /* We may need a .plt entry if the function this reloc
3837 refers to is in a shared lib. */
3838 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3839 rel->r_addend))
3840 return FALSE;
3841 if (h == htab->tls_get_addr)
3842 sec->has_tls_reloc = 1;
3843 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3844 == 0)
3845 && (h->root.root.string[15] == 0
3846 || h->root.root.string[15] == '@'))
3847 {
3848 htab->tls_get_addr = h;
3849 sec->has_tls_reloc = 1;
3850 }
3851 }
3852 break;
3853
3854 case R_PPC64_TPREL64:
3855 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3856 if (info->shared)
3857 info->flags |= DF_STATIC_TLS;
3858 goto dotlstoc;
3859
3860 case R_PPC64_DTPMOD64:
3861 if (rel + 1 < rel_end
3862 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3863 && rel[1].r_offset == rel->r_offset + 8)
3864 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3865 else
3866 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3867 goto dotlstoc;
3868
3869 case R_PPC64_DTPREL64:
3870 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3871 if (rel != relocs
3872 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3873 && rel[-1].r_offset == rel->r_offset - 8)
3874 /* This is the second reloc of a dtpmod, dtprel pair.
3875 Don't mark with TLS_DTPREL. */
3876 goto dodyn;
3877
3878 dotlstoc:
3879 sec->has_tls_reloc = 1;
3880 if (h != NULL)
3881 {
3882 struct ppc_link_hash_entry *eh;
3883 eh = (struct ppc_link_hash_entry *) h;
3884 eh->tls_mask |= tls_type;
3885 }
3886 else
3887 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3888 rel->r_addend, tls_type))
3889 return FALSE;
3890
3891 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3892 {
3893 /* One extra to simplify get_tls_mask. */
3894 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
3895 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3896 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3897 return FALSE;
3898 }
3899 BFD_ASSERT (rel->r_offset % 8 == 0);
3900 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3901
3902 /* Mark the second slot of a GD or LD entry.
3903 -1 to indicate GD and -2 to indicate LD. */
3904 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3905 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3906 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3907 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3908 goto dodyn;
3909
3910 case R_PPC64_TPREL16:
3911 case R_PPC64_TPREL16_LO:
3912 case R_PPC64_TPREL16_HI:
3913 case R_PPC64_TPREL16_HA:
3914 case R_PPC64_TPREL16_DS:
3915 case R_PPC64_TPREL16_LO_DS:
3916 case R_PPC64_TPREL16_HIGHER:
3917 case R_PPC64_TPREL16_HIGHERA:
3918 case R_PPC64_TPREL16_HIGHEST:
3919 case R_PPC64_TPREL16_HIGHESTA:
3920 if (info->shared)
3921 {
3922 info->flags |= DF_STATIC_TLS;
3923 goto dodyn;
3924 }
3925 break;
3926
3927 case R_PPC64_ADDR64:
3928 if (opd_sym_map != NULL
3929 && h != NULL
3930 && h->root.root.string[0] == '.'
3931 && h->root.root.string[1] != 0)
3932 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3933
3934 if (opd_sym_map != NULL
3935 && h == NULL
3936 && rel + 1 < rel_end
3937 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3938 {
3939 asection *s;
3940
3941 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3942 r_symndx);
3943 if (s == NULL)
3944 return FALSE;
3945 else if (s != sec)
3946 opd_sym_map[rel->r_offset / 24] = s;
3947 }
3948 /* Fall through. */
3949
3950 case R_PPC64_REL30:
3951 case R_PPC64_REL32:
3952 case R_PPC64_REL64:
3953 case R_PPC64_ADDR14:
3954 case R_PPC64_ADDR14_BRNTAKEN:
3955 case R_PPC64_ADDR14_BRTAKEN:
3956 case R_PPC64_ADDR16:
3957 case R_PPC64_ADDR16_DS:
3958 case R_PPC64_ADDR16_HA:
3959 case R_PPC64_ADDR16_HI:
3960 case R_PPC64_ADDR16_HIGHER:
3961 case R_PPC64_ADDR16_HIGHERA:
3962 case R_PPC64_ADDR16_HIGHEST:
3963 case R_PPC64_ADDR16_HIGHESTA:
3964 case R_PPC64_ADDR16_LO:
3965 case R_PPC64_ADDR16_LO_DS:
3966 case R_PPC64_ADDR24:
3967 case R_PPC64_ADDR32:
3968 case R_PPC64_UADDR16:
3969 case R_PPC64_UADDR32:
3970 case R_PPC64_UADDR64:
3971 case R_PPC64_TOC:
3972 if (h != NULL && !info->shared)
3973 /* We may need a copy reloc. */
3974 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3975
3976 /* Don't propagate .opd relocs. */
3977 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3978 break;
3979
3980 /* If we are creating a shared library, and this is a reloc
3981 against a global symbol, or a non PC relative reloc
3982 against a local symbol, then we need to copy the reloc
3983 into the shared library. However, if we are linking with
3984 -Bsymbolic, we do not need to copy a reloc against a
3985 global symbol which is defined in an object we are
3986 including in the link (i.e., DEF_REGULAR is set). At
3987 this point we have not seen all the input files, so it is
3988 possible that DEF_REGULAR is not set now but will be set
3989 later (it is never cleared). In case of a weak definition,
3990 DEF_REGULAR may be cleared later by a strong definition in
3991 a shared library. We account for that possibility below by
3992 storing information in the dyn_relocs field of the hash
3993 table entry. A similar situation occurs when creating
3994 shared libraries and symbol visibility changes render the
3995 symbol local.
3996
3997 If on the other hand, we are creating an executable, we
3998 may need to keep relocations for symbols satisfied by a
3999 dynamic library if we manage to avoid copy relocs for the
4000 symbol. */
4001 dodyn:
4002 if ((info->shared
4003 && (MUST_BE_DYN_RELOC (r_type)
4004 || (h != NULL
4005 && (! info->symbolic
4006 || h->root.type == bfd_link_hash_defweak
4007 || (h->elf_link_hash_flags
4008 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
4009 || (ELIMINATE_COPY_RELOCS
4010 && !info->shared
4011 && h != NULL
4012 && (h->root.type == bfd_link_hash_defweak
4013 || (h->elf_link_hash_flags
4014 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
4015 {
4016 struct ppc_dyn_relocs *p;
4017 struct ppc_dyn_relocs **head;
4018
4019 /* We must copy these reloc types into the output file.
4020 Create a reloc section in dynobj and make room for
4021 this reloc. */
4022 if (sreloc == NULL)
4023 {
4024 const char *name;
4025 bfd *dynobj;
4026
4027 name = (bfd_elf_string_from_elf_section
4028 (abfd,
4029 elf_elfheader (abfd)->e_shstrndx,
4030 elf_section_data (sec)->rel_hdr.sh_name));
4031 if (name == NULL)
4032 return FALSE;
4033
4034 if (strncmp (name, ".rela", 5) != 0
4035 || strcmp (bfd_get_section_name (abfd, sec),
4036 name + 5) != 0)
4037 {
4038 (*_bfd_error_handler)
4039 (_("%s: bad relocation section name `%s\'"),
4040 bfd_archive_filename (abfd), name);
4041 bfd_set_error (bfd_error_bad_value);
4042 }
4043
4044 dynobj = htab->elf.dynobj;
4045 sreloc = bfd_get_section_by_name (dynobj, name);
4046 if (sreloc == NULL)
4047 {
4048 flagword flags;
4049
4050 sreloc = bfd_make_section (dynobj, name);
4051 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4052 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4053 if ((sec->flags & SEC_ALLOC) != 0)
4054 flags |= SEC_ALLOC | SEC_LOAD;
4055 if (sreloc == NULL
4056 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4057 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4058 return FALSE;
4059 }
4060 elf_section_data (sec)->sreloc = sreloc;
4061 }
4062
4063 /* If this is a global symbol, we count the number of
4064 relocations we need for this symbol. */
4065 if (h != NULL)
4066 {
4067 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4068 }
4069 else
4070 {
4071 /* Track dynamic relocs needed for local syms too.
4072 We really need local syms available to do this
4073 easily. Oh well. */
4074
4075 asection *s;
4076 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4077 sec, r_symndx);
4078 if (s == NULL)
4079 return FALSE;
4080
4081 head = ((struct ppc_dyn_relocs **)
4082 &elf_section_data (s)->local_dynrel);
4083 }
4084
4085 p = *head;
4086 if (p == NULL || p->sec != sec)
4087 {
4088 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4089 if (p == NULL)
4090 return FALSE;
4091 p->next = *head;
4092 *head = p;
4093 p->sec = sec;
4094 p->count = 0;
4095 p->pc_count = 0;
4096 }
4097
4098 p->count += 1;
4099 if (!MUST_BE_DYN_RELOC (r_type))
4100 p->pc_count += 1;
4101 }
4102 break;
4103
4104 default:
4105 break;
4106 }
4107 }
4108
4109 return TRUE;
4110 }
4111
4112 /* Return the section that should be marked against GC for a given
4113 relocation. */
4114
4115 static asection *
4116 ppc64_elf_gc_mark_hook (asection *sec,
4117 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4118 Elf_Internal_Rela *rel,
4119 struct elf_link_hash_entry *h,
4120 Elf_Internal_Sym *sym)
4121 {
4122 asection *rsec = NULL;
4123
4124 if (h != NULL)
4125 {
4126 enum elf_ppc64_reloc_type r_type;
4127 struct ppc_link_hash_entry *fdh;
4128
4129 r_type = ELF64_R_TYPE (rel->r_info);
4130 switch (r_type)
4131 {
4132 case R_PPC64_GNU_VTINHERIT:
4133 case R_PPC64_GNU_VTENTRY:
4134 break;
4135
4136 default:
4137 switch (h->root.type)
4138 {
4139 case bfd_link_hash_defined:
4140 case bfd_link_hash_defweak:
4141 fdh = (struct ppc_link_hash_entry *) h;
4142
4143 /* Function descriptor syms cause the associated
4144 function code sym section to be marked. */
4145 if (fdh->is_func_descriptor)
4146 rsec = fdh->oh->root.u.def.section;
4147
4148 /* Function entry syms return NULL if they are in .opd
4149 and are not ._start (or others undefined on the ld
4150 command line). Thus we avoid marking all function
4151 sections, as all functions are referenced in .opd. */
4152 else if ((fdh->oh != NULL
4153 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4154 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4155 rsec = h->root.u.def.section;
4156 break;
4157
4158 case bfd_link_hash_common:
4159 rsec = h->root.u.c.p->section;
4160 break;
4161
4162 default:
4163 break;
4164 }
4165 }
4166 }
4167 else
4168 {
4169 asection **opd_sym_section;
4170
4171 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4172 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4173 if (opd_sym_section != NULL)
4174 rsec = opd_sym_section[sym->st_value / 24];
4175 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4176 rsec = NULL;
4177 }
4178
4179 return rsec;
4180 }
4181
4182 /* Update the .got, .plt. and dynamic reloc reference counts for the
4183 section being removed. */
4184
4185 static bfd_boolean
4186 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4187 asection *sec, const Elf_Internal_Rela *relocs)
4188 {
4189 struct ppc_link_hash_table *htab;
4190 Elf_Internal_Shdr *symtab_hdr;
4191 struct elf_link_hash_entry **sym_hashes;
4192 struct got_entry **local_got_ents;
4193 const Elf_Internal_Rela *rel, *relend;
4194
4195 if ((sec->flags & SEC_ALLOC) == 0)
4196 return TRUE;
4197
4198 elf_section_data (sec)->local_dynrel = NULL;
4199
4200 htab = ppc_hash_table (info);
4201 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4202 sym_hashes = elf_sym_hashes (abfd);
4203 local_got_ents = elf_local_got_ents (abfd);
4204
4205 relend = relocs + sec->reloc_count;
4206 for (rel = relocs; rel < relend; rel++)
4207 {
4208 unsigned long r_symndx;
4209 enum elf_ppc64_reloc_type r_type;
4210 struct elf_link_hash_entry *h = NULL;
4211 char tls_type = 0;
4212
4213 r_symndx = ELF64_R_SYM (rel->r_info);
4214 r_type = ELF64_R_TYPE (rel->r_info);
4215 if (r_symndx >= symtab_hdr->sh_info)
4216 {
4217 struct ppc_link_hash_entry *eh;
4218 struct ppc_dyn_relocs **pp;
4219 struct ppc_dyn_relocs *p;
4220
4221 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4222 eh = (struct ppc_link_hash_entry *) h;
4223
4224 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4225 if (p->sec == sec)
4226 {
4227 /* Everything must go for SEC. */
4228 *pp = p->next;
4229 break;
4230 }
4231 }
4232
4233 switch (r_type)
4234 {
4235 case R_PPC64_GOT_TLSLD16:
4236 case R_PPC64_GOT_TLSLD16_LO:
4237 case R_PPC64_GOT_TLSLD16_HI:
4238 case R_PPC64_GOT_TLSLD16_HA:
4239 ppc64_tlsld_got (abfd)->refcount -= 1;
4240 tls_type = TLS_TLS | TLS_LD;
4241 goto dogot;
4242
4243 case R_PPC64_GOT_TLSGD16:
4244 case R_PPC64_GOT_TLSGD16_LO:
4245 case R_PPC64_GOT_TLSGD16_HI:
4246 case R_PPC64_GOT_TLSGD16_HA:
4247 tls_type = TLS_TLS | TLS_GD;
4248 goto dogot;
4249
4250 case R_PPC64_GOT_TPREL16_DS:
4251 case R_PPC64_GOT_TPREL16_LO_DS:
4252 case R_PPC64_GOT_TPREL16_HI:
4253 case R_PPC64_GOT_TPREL16_HA:
4254 tls_type = TLS_TLS | TLS_TPREL;
4255 goto dogot;
4256
4257 case R_PPC64_GOT_DTPREL16_DS:
4258 case R_PPC64_GOT_DTPREL16_LO_DS:
4259 case R_PPC64_GOT_DTPREL16_HI:
4260 case R_PPC64_GOT_DTPREL16_HA:
4261 tls_type = TLS_TLS | TLS_DTPREL;
4262 goto dogot;
4263
4264 case R_PPC64_GOT16:
4265 case R_PPC64_GOT16_DS:
4266 case R_PPC64_GOT16_HA:
4267 case R_PPC64_GOT16_HI:
4268 case R_PPC64_GOT16_LO:
4269 case R_PPC64_GOT16_LO_DS:
4270 dogot:
4271 {
4272 struct got_entry *ent;
4273
4274 if (h != NULL)
4275 ent = h->got.glist;
4276 else
4277 ent = local_got_ents[r_symndx];
4278
4279 for (; ent != NULL; ent = ent->next)
4280 if (ent->addend == rel->r_addend
4281 && ent->owner == abfd
4282 && ent->tls_type == tls_type)
4283 break;
4284 if (ent == NULL)
4285 abort ();
4286 if (ent->got.refcount > 0)
4287 ent->got.refcount -= 1;
4288 }
4289 break;
4290
4291 case R_PPC64_PLT16_HA:
4292 case R_PPC64_PLT16_HI:
4293 case R_PPC64_PLT16_LO:
4294 case R_PPC64_PLT32:
4295 case R_PPC64_PLT64:
4296 case R_PPC64_REL14:
4297 case R_PPC64_REL14_BRNTAKEN:
4298 case R_PPC64_REL14_BRTAKEN:
4299 case R_PPC64_REL24:
4300 if (h != NULL)
4301 {
4302 struct plt_entry *ent;
4303
4304 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4305 if (ent->addend == rel->r_addend)
4306 break;
4307 if (ent == NULL)
4308 abort ();
4309 if (ent->plt.refcount > 0)
4310 ent->plt.refcount -= 1;
4311 }
4312 break;
4313
4314 default:
4315 break;
4316 }
4317 }
4318 return TRUE;
4319 }
4320
4321 /* Called via elf_link_hash_traverse to transfer dynamic linking
4322 information on function code symbol entries to their corresponding
4323 function descriptor symbol entries. */
4324 static bfd_boolean
4325 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4326 {
4327 struct bfd_link_info *info;
4328 struct ppc_link_hash_table *htab;
4329 struct plt_entry *ent;
4330 struct ppc_link_hash_entry *fh;
4331 struct ppc_link_hash_entry *fdh;
4332 bfd_boolean force_local;
4333
4334 fh = (struct ppc_link_hash_entry *) h;
4335 if (fh->elf.root.type == bfd_link_hash_indirect)
4336 return TRUE;
4337
4338 if (fh->elf.root.type == bfd_link_hash_warning)
4339 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4340
4341 info = inf;
4342 htab = ppc_hash_table (info);
4343
4344 /* If this is a function code symbol, transfer dynamic linking
4345 information to the function descriptor symbol. */
4346 if (!fh->is_func)
4347 return TRUE;
4348
4349 if (fh->elf.root.type == bfd_link_hash_undefweak
4350 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4351 htab->have_undefweak = TRUE;
4352
4353 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4354 if (ent->plt.refcount > 0)
4355 break;
4356 if (ent == NULL
4357 || fh->elf.root.root.string[0] != '.'
4358 || fh->elf.root.root.string[1] == '\0')
4359 return TRUE;
4360
4361 /* Find the corresponding function descriptor symbol. Create it
4362 as undefined if necessary. */
4363
4364 fdh = get_fdh (fh, htab);
4365 if (fdh != NULL)
4366 while (fdh->elf.root.type == bfd_link_hash_indirect
4367 || fdh->elf.root.type == bfd_link_hash_warning)
4368 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4369
4370 if (fdh == NULL
4371 && info->shared
4372 && (fh->elf.root.type == bfd_link_hash_undefined
4373 || fh->elf.root.type == bfd_link_hash_undefweak))
4374 {
4375 bfd *abfd;
4376 asymbol *newsym;
4377 struct bfd_link_hash_entry *bh;
4378
4379 abfd = fh->elf.root.u.undef.abfd;
4380 newsym = bfd_make_empty_symbol (abfd);
4381 newsym->name = fh->elf.root.root.string + 1;
4382 newsym->section = bfd_und_section_ptr;
4383 newsym->value = 0;
4384 newsym->flags = BSF_OBJECT;
4385 if (fh->elf.root.type == bfd_link_hash_undefweak)
4386 newsym->flags |= BSF_WEAK;
4387
4388 bh = &fdh->elf.root;
4389 if ( !(_bfd_generic_link_add_one_symbol
4390 (info, abfd, newsym->name, newsym->flags,
4391 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4392 {
4393 return FALSE;
4394 }
4395 fdh = (struct ppc_link_hash_entry *) bh;
4396 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4397 fdh->elf.size = 24;
4398 fdh->elf.type = STT_OBJECT;
4399 }
4400
4401 if (fdh != NULL
4402 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4403 && (info->shared
4404 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4405 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4406 || (fdh->elf.root.type == bfd_link_hash_undefweak
4407 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4408 {
4409 if (fdh->elf.dynindx == -1)
4410 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
4411 return FALSE;
4412 fdh->elf.elf_link_hash_flags
4413 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4414 | ELF_LINK_HASH_REF_DYNAMIC
4415 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4416 | ELF_LINK_NON_GOT_REF));
4417 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4418 {
4419 fdh->elf.plt.plist = fh->elf.plt.plist;
4420 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4421 }
4422 fdh->is_func_descriptor = 1;
4423 fdh->oh = &fh->elf;
4424 fh->oh = &fdh->elf;
4425 }
4426
4427 /* Now that the info is on the function descriptor, clear the
4428 function code sym info. Any function code syms for which we
4429 don't have a definition in a regular file, we force local.
4430 This prevents a shared library from exporting syms that have
4431 been imported from another library. Function code syms that
4432 are really in the library we must leave global to prevent the
4433 linker dragging in a definition from a static library. */
4434 force_local
4435 = (info->shared
4436 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4437 || fdh == NULL
4438 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4439 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4440 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4441
4442 return TRUE;
4443 }
4444
4445 #define MIN_SAVE_FPR 14
4446 #define MAX_SAVE_FPR 31
4447
4448 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4449 this hook to a) provide some gcc support functions, and b) transfer
4450 dynamic linking information gathered so far on function code symbol
4451 entries, to their corresponding function descriptor symbol entries. */
4452 static bfd_boolean
4453 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4454 struct bfd_link_info *info)
4455 {
4456 struct ppc_link_hash_table *htab;
4457 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4458 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4459 unsigned int i;
4460 struct elf_link_hash_entry *h;
4461 bfd_byte *p;
4462 char sym[10];
4463
4464 htab = ppc_hash_table (info);
4465
4466 if (htab->sfpr == NULL)
4467 /* We don't have any relocs. */
4468 return TRUE;
4469
4470 /* First provide any missing ._savef* and ._restf* functions. */
4471 memcpy (sym, "._savef14", 10);
4472 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4473 {
4474 sym[7] = i / 10 + '0';
4475 sym[8] = i % 10 + '0';
4476 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4477 if (h != NULL
4478 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4479 {
4480 if (lowest_savef > i)
4481 lowest_savef = i;
4482 h->root.type = bfd_link_hash_defined;
4483 h->root.u.def.section = htab->sfpr;
4484 h->root.u.def.value = (i - lowest_savef) * 4;
4485 h->type = STT_FUNC;
4486 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4487 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4488 }
4489 }
4490
4491 memcpy (sym, "._restf14", 10);
4492 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4493 {
4494 sym[7] = i / 10 + '0';
4495 sym[8] = i % 10 + '0';
4496 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4497 if (h != NULL
4498 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4499 {
4500 if (lowest_restf > i)
4501 lowest_restf = i;
4502 h->root.type = bfd_link_hash_defined;
4503 h->root.u.def.section = htab->sfpr;
4504 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4505 + (i - lowest_restf) * 4);
4506 h->type = STT_FUNC;
4507 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4508 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4509 }
4510 }
4511
4512 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4513
4514 htab->sfpr->size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4515 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4516
4517 if (htab->sfpr->size == 0)
4518 {
4519 if (!htab->have_undefweak)
4520 {
4521 _bfd_strip_section_from_output (info, htab->sfpr);
4522 return TRUE;
4523 }
4524
4525 htab->sfpr->size = 4;
4526 }
4527
4528 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->size);
4529 if (p == NULL)
4530 return FALSE;
4531 htab->sfpr->contents = p;
4532
4533 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4534 {
4535 unsigned int fpr = i << 21;
4536 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4537 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4538 p += 4;
4539 }
4540 if (lowest_savef <= MAX_SAVE_FPR)
4541 {
4542 bfd_put_32 (htab->elf.dynobj, BLR, p);
4543 p += 4;
4544 }
4545
4546 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4547 {
4548 unsigned int fpr = i << 21;
4549 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4550 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4551 p += 4;
4552 }
4553 if (lowest_restf <= MAX_SAVE_FPR
4554 || htab->sfpr->size == 4)
4555 {
4556 bfd_put_32 (htab->elf.dynobj, BLR, p);
4557 }
4558
4559 return TRUE;
4560 }
4561
4562 /* Adjust a symbol defined by a dynamic object and referenced by a
4563 regular object. The current definition is in some section of the
4564 dynamic object, but we're not including those sections. We have to
4565 change the definition to something the rest of the link can
4566 understand. */
4567
4568 static bfd_boolean
4569 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4570 struct elf_link_hash_entry *h)
4571 {
4572 struct ppc_link_hash_table *htab;
4573 asection *s;
4574 unsigned int power_of_two;
4575
4576 htab = ppc_hash_table (info);
4577
4578 /* Deal with function syms. */
4579 if (h->type == STT_FUNC
4580 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4581 {
4582 /* Clear procedure linkage table information for any symbol that
4583 won't need a .plt entry. */
4584 struct plt_entry *ent;
4585 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4586 if (ent->plt.refcount > 0)
4587 break;
4588 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4589 || ent == NULL
4590 || SYMBOL_CALLS_LOCAL (info, h)
4591 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4592 && h->root.type == bfd_link_hash_undefweak))
4593 {
4594 h->plt.plist = NULL;
4595 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4596 }
4597 }
4598 else
4599 h->plt.plist = NULL;
4600
4601 /* If this is a weak symbol, and there is a real definition, the
4602 processor independent code will have arranged for us to see the
4603 real definition first, and we can just use the same value. */
4604 if (h->weakdef != NULL)
4605 {
4606 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4607 || h->weakdef->root.type == bfd_link_hash_defweak);
4608 h->root.u.def.section = h->weakdef->root.u.def.section;
4609 h->root.u.def.value = h->weakdef->root.u.def.value;
4610 if (ELIMINATE_COPY_RELOCS)
4611 h->elf_link_hash_flags
4612 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4613 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4614 return TRUE;
4615 }
4616
4617 /* If we are creating a shared library, we must presume that the
4618 only references to the symbol are via the global offset table.
4619 For such cases we need not do anything here; the relocations will
4620 be handled correctly by relocate_section. */
4621 if (info->shared)
4622 return TRUE;
4623
4624 /* If there are no references to this symbol that do not use the
4625 GOT, we don't need to generate a copy reloc. */
4626 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4627 return TRUE;
4628
4629 if (ELIMINATE_COPY_RELOCS)
4630 {
4631 struct ppc_link_hash_entry * eh;
4632 struct ppc_dyn_relocs *p;
4633
4634 eh = (struct ppc_link_hash_entry *) h;
4635 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4636 {
4637 s = p->sec->output_section;
4638 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4639 break;
4640 }
4641
4642 /* If we didn't find any dynamic relocs in read-only sections, then
4643 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4644 if (p == NULL)
4645 {
4646 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4647 return TRUE;
4648 }
4649 }
4650
4651 if (h->plt.plist != NULL)
4652 {
4653 /* We should never get here, but unfortunately there are versions
4654 of gcc out there that improperly (for this ABI) put initialized
4655 function pointers, vtable refs and suchlike in read-only
4656 sections. Allow them to proceed, but warn that this might
4657 break at runtime. */
4658 (*_bfd_error_handler)
4659 (_("copy reloc against `%s' requires lazy plt linking; "
4660 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
4661 h->root.root.string);
4662 }
4663
4664 /* This is a reference to a symbol defined by a dynamic object which
4665 is not a function. */
4666
4667 /* We must allocate the symbol in our .dynbss section, which will
4668 become part of the .bss section of the executable. There will be
4669 an entry for this symbol in the .dynsym section. The dynamic
4670 object will contain position independent code, so all references
4671 from the dynamic object to this symbol will go through the global
4672 offset table. The dynamic linker will use the .dynsym entry to
4673 determine the address it must put in the global offset table, so
4674 both the dynamic object and the regular object will refer to the
4675 same memory location for the variable. */
4676
4677 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4678 to copy the initial value out of the dynamic object and into the
4679 runtime process image. We need to remember the offset into the
4680 .rela.bss section we are going to use. */
4681 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4682 {
4683 htab->relbss->size += sizeof (Elf64_External_Rela);
4684 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4685 }
4686
4687 /* We need to figure out the alignment required for this symbol. I
4688 have no idea how ELF linkers handle this. */
4689 power_of_two = bfd_log2 (h->size);
4690 if (power_of_two > 4)
4691 power_of_two = 4;
4692
4693 /* Apply the required alignment. */
4694 s = htab->dynbss;
4695 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4696 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4697 {
4698 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4699 return FALSE;
4700 }
4701
4702 /* Define the symbol as being at this point in the section. */
4703 h->root.u.def.section = s;
4704 h->root.u.def.value = s->size;
4705
4706 /* Increment the section size to make room for the symbol. */
4707 s->size += h->size;
4708
4709 return TRUE;
4710 }
4711
4712 /* If given a function descriptor symbol, hide both the function code
4713 sym and the descriptor. */
4714 static void
4715 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4716 struct elf_link_hash_entry *h,
4717 bfd_boolean force_local)
4718 {
4719 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4720
4721 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4722 {
4723 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4724
4725 if (fh == NULL)
4726 {
4727 const char *p, *q;
4728 struct ppc_link_hash_table *htab;
4729 char save;
4730
4731 /* We aren't supposed to use alloca in BFD because on
4732 systems which do not have alloca the version in libiberty
4733 calls xmalloc, which might cause the program to crash
4734 when it runs out of memory. This function doesn't have a
4735 return status, so there's no way to gracefully return an
4736 error. So cheat. We know that string[-1] can be safely
4737 dereferenced; It's either a string in an ELF string
4738 table, or allocated in an objalloc structure. */
4739
4740 p = h->root.root.string - 1;
4741 save = *p;
4742 *(char *) p = '.';
4743 htab = ppc_hash_table (info);
4744 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4745 *(char *) p = save;
4746
4747 /* Unfortunately, if it so happens that the string we were
4748 looking for was allocated immediately before this string,
4749 then we overwrote the string terminator. That's the only
4750 reason the lookup should fail. */
4751 if (fh == NULL)
4752 {
4753 q = h->root.root.string + strlen (h->root.root.string);
4754 while (q >= h->root.root.string && *q == *p)
4755 --q, --p;
4756 if (q < h->root.root.string && *p == '.')
4757 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4758 }
4759 if (fh != NULL)
4760 {
4761 ((struct ppc_link_hash_entry *) h)->oh = fh;
4762 ((struct ppc_link_hash_entry *) fh)->oh = h;
4763 }
4764 }
4765 if (fh != NULL)
4766 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4767 }
4768 }
4769
4770 static bfd_boolean
4771 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4772 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4773 unsigned long r_symndx, bfd *ibfd)
4774 {
4775 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4776
4777 if (r_symndx >= symtab_hdr->sh_info)
4778 {
4779 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4780 struct elf_link_hash_entry *h;
4781
4782 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4783 while (h->root.type == bfd_link_hash_indirect
4784 || h->root.type == bfd_link_hash_warning)
4785 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4786
4787 if (hp != NULL)
4788 *hp = h;
4789
4790 if (symp != NULL)
4791 *symp = NULL;
4792
4793 if (symsecp != NULL)
4794 {
4795 asection *symsec = NULL;
4796 if (h->root.type == bfd_link_hash_defined
4797 || h->root.type == bfd_link_hash_defweak)
4798 symsec = h->root.u.def.section;
4799 *symsecp = symsec;
4800 }
4801
4802 if (tls_maskp != NULL)
4803 {
4804 struct ppc_link_hash_entry *eh;
4805
4806 eh = (struct ppc_link_hash_entry *) h;
4807 *tls_maskp = &eh->tls_mask;
4808 }
4809 }
4810 else
4811 {
4812 Elf_Internal_Sym *sym;
4813 Elf_Internal_Sym *locsyms = *locsymsp;
4814
4815 if (locsyms == NULL)
4816 {
4817 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4818 if (locsyms == NULL)
4819 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4820 symtab_hdr->sh_info,
4821 0, NULL, NULL, NULL);
4822 if (locsyms == NULL)
4823 return FALSE;
4824 *locsymsp = locsyms;
4825 }
4826 sym = locsyms + r_symndx;
4827
4828 if (hp != NULL)
4829 *hp = NULL;
4830
4831 if (symp != NULL)
4832 *symp = sym;
4833
4834 if (symsecp != NULL)
4835 {
4836 asection *symsec = NULL;
4837 if ((sym->st_shndx != SHN_UNDEF
4838 && sym->st_shndx < SHN_LORESERVE)
4839 || sym->st_shndx > SHN_HIRESERVE)
4840 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4841 *symsecp = symsec;
4842 }
4843
4844 if (tls_maskp != NULL)
4845 {
4846 struct got_entry **lgot_ents;
4847 char *tls_mask;
4848
4849 tls_mask = NULL;
4850 lgot_ents = elf_local_got_ents (ibfd);
4851 if (lgot_ents != NULL)
4852 {
4853 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4854 tls_mask = &lgot_masks[r_symndx];
4855 }
4856 *tls_maskp = tls_mask;
4857 }
4858 }
4859 return TRUE;
4860 }
4861
4862 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4863 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4864 type suitable for optimization, and 1 otherwise. */
4865
4866 static int
4867 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
4868 Elf_Internal_Sym **locsymsp,
4869 const Elf_Internal_Rela *rel, bfd *ibfd)
4870 {
4871 unsigned long r_symndx;
4872 int next_r;
4873 struct elf_link_hash_entry *h;
4874 Elf_Internal_Sym *sym;
4875 asection *sec;
4876 bfd_vma off;
4877
4878 r_symndx = ELF64_R_SYM (rel->r_info);
4879 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4880 return 0;
4881
4882 if ((*tls_maskp != NULL && **tls_maskp != 0)
4883 || sec == NULL
4884 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4885 return 1;
4886
4887 /* Look inside a TOC section too. */
4888 if (h != NULL)
4889 {
4890 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4891 off = h->root.u.def.value;
4892 }
4893 else
4894 off = sym->st_value;
4895 off += rel->r_addend;
4896 BFD_ASSERT (off % 8 == 0);
4897 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4898 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4899 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4900 return 0;
4901 if (toc_symndx != NULL)
4902 *toc_symndx = r_symndx;
4903 if ((h == NULL
4904 || ((h->root.type == bfd_link_hash_defined
4905 || h->root.type == bfd_link_hash_defweak)
4906 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4907 && (next_r == -1 || next_r == -2))
4908 return 1 - next_r;
4909 return 1;
4910 }
4911
4912 /* Adjust all global syms defined in opd sections. In gcc generated
4913 code these will already have been done, but I suppose we have to
4914 cater for all sorts of hand written assembly. */
4915
4916 static bfd_boolean
4917 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
4918 {
4919 struct ppc_link_hash_entry *eh;
4920 asection *sym_sec;
4921 long *opd_adjust;
4922
4923 if (h->root.type == bfd_link_hash_indirect)
4924 return TRUE;
4925
4926 if (h->root.type == bfd_link_hash_warning)
4927 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4928
4929 if (h->root.type != bfd_link_hash_defined
4930 && h->root.type != bfd_link_hash_defweak)
4931 return TRUE;
4932
4933 eh = (struct ppc_link_hash_entry *) h;
4934 if (eh->adjust_done)
4935 return TRUE;
4936
4937 sym_sec = eh->elf.root.u.def.section;
4938 if (sym_sec != NULL
4939 && elf_section_data (sym_sec) != NULL
4940 && (opd_adjust = ppc64_elf_section_data (sym_sec)->opd.adjust) != NULL)
4941 {
4942 eh->elf.root.u.def.value += opd_adjust[eh->elf.root.u.def.value / 24];
4943 eh->adjust_done = 1;
4944 }
4945 return TRUE;
4946 }
4947
4948 /* Remove unused Official Procedure Descriptor entries. Currently we
4949 only remove those associated with functions in discarded link-once
4950 sections, or weakly defined functions that have been overridden. It
4951 would be possible to remove many more entries for statically linked
4952 applications. */
4953
4954 bfd_boolean
4955 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4956 {
4957 bfd *ibfd;
4958 bfd_boolean some_edited = FALSE;
4959
4960 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4961 {
4962 asection *sec;
4963 Elf_Internal_Rela *relstart, *rel, *relend;
4964 Elf_Internal_Shdr *symtab_hdr;
4965 Elf_Internal_Sym *local_syms;
4966 struct elf_link_hash_entry **sym_hashes;
4967 bfd_vma offset;
4968 bfd_size_type amt;
4969 long *adjust;
4970 bfd_boolean need_edit;
4971
4972 sec = bfd_get_section_by_name (ibfd, ".opd");
4973 if (sec == NULL)
4974 continue;
4975
4976 amt = sec->size * sizeof (long) / 24;
4977 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4978 if (adjust == NULL)
4979 {
4980 /* Must be a ld -r link. ie. check_relocs hasn't been
4981 called. */
4982 adjust = bfd_zalloc (obfd, amt);
4983 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4984 }
4985 memset (adjust, 0, amt);
4986
4987 if (sec->output_section == bfd_abs_section_ptr)
4988 continue;
4989
4990 /* Look through the section relocs. */
4991 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4992 continue;
4993
4994 local_syms = NULL;
4995 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4996 sym_hashes = elf_sym_hashes (ibfd);
4997
4998 /* Read the relocations. */
4999 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5000 info->keep_memory);
5001 if (relstart == NULL)
5002 return FALSE;
5003
5004 /* First run through the relocs to check they are sane, and to
5005 determine whether we need to edit this opd section. */
5006 need_edit = FALSE;
5007 offset = 0;
5008 relend = relstart + sec->reloc_count;
5009 for (rel = relstart; rel < relend; )
5010 {
5011 enum elf_ppc64_reloc_type r_type;
5012 unsigned long r_symndx;
5013 asection *sym_sec;
5014 struct elf_link_hash_entry *h;
5015 Elf_Internal_Sym *sym;
5016
5017 /* .opd contains a regular array of 24 byte entries. We're
5018 only interested in the reloc pointing to a function entry
5019 point. */
5020 if (rel->r_offset != offset
5021 || rel + 1 >= relend
5022 || (rel + 1)->r_offset != offset + 8)
5023 {
5024 /* If someone messes with .opd alignment then after a
5025 "ld -r" we might have padding in the middle of .opd.
5026 Also, there's nothing to prevent someone putting
5027 something silly in .opd with the assembler. No .opd
5028 optimization for them! */
5029 (*_bfd_error_handler)
5030 (_("%s: .opd is not a regular array of opd entries"),
5031 bfd_archive_filename (ibfd));
5032 need_edit = FALSE;
5033 break;
5034 }
5035
5036 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
5037 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
5038 {
5039 (*_bfd_error_handler)
5040 (_("%s: unexpected reloc type %u in .opd section"),
5041 bfd_archive_filename (ibfd), r_type);
5042 need_edit = FALSE;
5043 break;
5044 }
5045
5046 r_symndx = ELF64_R_SYM (rel->r_info);
5047 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5048 r_symndx, ibfd))
5049 goto error_ret;
5050
5051 if (sym_sec == NULL || sym_sec->owner == NULL)
5052 {
5053 const char *sym_name;
5054 if (h != NULL)
5055 sym_name = h->root.root.string;
5056 else
5057 sym_name = bfd_elf_local_sym_name (ibfd, sym);
5058
5059 (*_bfd_error_handler)
5060 (_("%s: undefined sym `%s' in .opd section"),
5061 bfd_archive_filename (ibfd),
5062 sym_name);
5063 need_edit = FALSE;
5064 break;
5065 }
5066
5067 /* opd entries are always for functions defined in the
5068 current input bfd. If the symbol isn't defined in the
5069 input bfd, then we won't be using the function in this
5070 bfd; It must be defined in a linkonce section in another
5071 bfd, or is weak. It's also possible that we are
5072 discarding the function due to a linker script /DISCARD/,
5073 which we test for via the output_section. */
5074 if (sym_sec->owner != ibfd
5075 || sym_sec->output_section == bfd_abs_section_ptr)
5076 need_edit = TRUE;
5077
5078 offset += 24;
5079 rel += 2;
5080 /* Allow for the possibility of a reloc on the third word. */
5081 if (rel < relend
5082 && rel->r_offset == offset - 8)
5083 rel += 1;
5084 }
5085
5086 if (need_edit)
5087 {
5088 Elf_Internal_Rela *write_rel;
5089 bfd_byte *rptr, *wptr;
5090 bfd_boolean skip;
5091
5092 /* This seems a waste of time as input .opd sections are all
5093 zeros as generated by gcc, but I suppose there's no reason
5094 this will always be so. We might start putting something in
5095 the third word of .opd entries. */
5096 if ((sec->flags & SEC_IN_MEMORY) == 0)
5097 {
5098 bfd_byte *loc;
5099 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
5100 {
5101 if (loc != NULL)
5102 free (loc);
5103 error_ret:
5104 if (local_syms != NULL
5105 && symtab_hdr->contents != (unsigned char *) local_syms)
5106 free (local_syms);
5107 if (elf_section_data (sec)->relocs != relstart)
5108 free (relstart);
5109 return FALSE;
5110 }
5111 sec->contents = loc;
5112 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
5113 }
5114
5115 elf_section_data (sec)->relocs = relstart;
5116
5117 wptr = sec->contents;
5118 rptr = sec->contents;
5119 write_rel = relstart;
5120 skip = FALSE;
5121 offset = 0;
5122 for (rel = relstart; rel < relend; rel++)
5123 {
5124 unsigned long r_symndx;
5125 asection *sym_sec;
5126 struct elf_link_hash_entry *h;
5127 Elf_Internal_Sym *sym;
5128
5129 r_symndx = ELF64_R_SYM (rel->r_info);
5130 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5131 r_symndx, ibfd))
5132 goto error_ret;
5133
5134 if (rel->r_offset == offset)
5135 {
5136 struct ppc_link_hash_entry *fdh = NULL;
5137 if (h != NULL)
5138 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5139 ppc_hash_table (info));
5140
5141 skip = (sym_sec->owner != ibfd
5142 || sym_sec->output_section == bfd_abs_section_ptr);
5143 if (skip)
5144 {
5145 if (h != NULL && sym_sec->owner == ibfd)
5146 {
5147 /* Arrange for the function descriptor sym
5148 to be dropped. */
5149 fdh->elf.root.u.def.value = 0;
5150 fdh->elf.root.u.def.section = sym_sec;
5151 }
5152 }
5153 else
5154 {
5155 /* We'll be keeping this opd entry. */
5156
5157 if (h != NULL)
5158 {
5159 /* Redefine the function descriptor symbol to
5160 this location in the opd section. It is
5161 necessary to update the value here rather
5162 than using an array of adjustments as we do
5163 for local symbols, because various places
5164 in the generic ELF code use the value
5165 stored in u.def.value. */
5166 fdh->elf.root.u.def.value = wptr - sec->contents;
5167 fdh->adjust_done = 1;
5168 }
5169
5170 /* Local syms are a bit tricky. We could
5171 tweak them as they can be cached, but
5172 we'd need to look through the local syms
5173 for the function descriptor sym which we
5174 don't have at the moment. So keep an
5175 array of adjustments. */
5176 adjust[rel->r_offset / 24] = wptr - rptr;
5177
5178 if (wptr != rptr)
5179 memcpy (wptr, rptr, 24);
5180 wptr += 24;
5181 }
5182 rptr += 24;
5183 offset += 24;
5184 }
5185
5186 if (skip)
5187 {
5188 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5189 if (info->shared)
5190 {
5191 /* We won't be needing dynamic relocs here. */
5192 struct ppc_dyn_relocs **pp;
5193 struct ppc_dyn_relocs *p;
5194
5195 if (h != NULL)
5196 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5197 else if (sym_sec != NULL)
5198 pp = ((struct ppc_dyn_relocs **)
5199 &elf_section_data (sym_sec)->local_dynrel);
5200 else
5201 pp = ((struct ppc_dyn_relocs **)
5202 &elf_section_data (sec)->local_dynrel);
5203 while ((p = *pp) != NULL)
5204 {
5205 if (p->sec == sec)
5206 {
5207 p->count -= 1;
5208 if (p->count == 0)
5209 *pp = p->next;
5210 break;
5211 }
5212 pp = &p->next;
5213 }
5214 }
5215 }
5216 else
5217 {
5218 /* We need to adjust any reloc offsets to point to the
5219 new opd entries. While we're at it, we may as well
5220 remove redundant relocs. */
5221 rel->r_offset += wptr - rptr;
5222 if (write_rel != rel)
5223 memcpy (write_rel, rel, sizeof (*rel));
5224 ++write_rel;
5225 }
5226 }
5227
5228 sec->size = wptr - sec->contents;
5229 sec->reloc_count = write_rel - relstart;
5230 /* Fudge the size too, as this is used later in
5231 elf_bfd_final_link if we are emitting relocs. */
5232 elf_section_data (sec)->rel_hdr.sh_size
5233 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5234 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5235 some_edited = TRUE;
5236 }
5237 else if (elf_section_data (sec)->relocs != relstart)
5238 free (relstart);
5239
5240 if (local_syms != NULL
5241 && symtab_hdr->contents != (unsigned char *) local_syms)
5242 {
5243 if (!info->keep_memory)
5244 free (local_syms);
5245 else
5246 symtab_hdr->contents = (unsigned char *) local_syms;
5247 }
5248 }
5249
5250 if (some_edited)
5251 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
5252
5253 return TRUE;
5254 }
5255
5256 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
5257
5258 asection *
5259 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5260 {
5261 struct ppc_link_hash_table *htab;
5262
5263 htab = ppc_hash_table (info);
5264 if (htab->tls_get_addr != NULL)
5265 {
5266 struct elf_link_hash_entry *h = htab->tls_get_addr;
5267
5268 while (h->root.type == bfd_link_hash_indirect
5269 || h->root.type == bfd_link_hash_warning)
5270 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5271
5272 htab->tls_get_addr = h;
5273 }
5274
5275 return _bfd_elf_tls_setup (obfd, info);
5276 }
5277
5278 /* Run through all the TLS relocs looking for optimization
5279 opportunities. The linker has been hacked (see ppc64elf.em) to do
5280 a preliminary section layout so that we know the TLS segment
5281 offsets. We can't optimize earlier because some optimizations need
5282 to know the tp offset, and we need to optimize before allocating
5283 dynamic relocations. */
5284
5285 bfd_boolean
5286 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5287 {
5288 bfd *ibfd;
5289 asection *sec;
5290 struct ppc_link_hash_table *htab;
5291
5292 if (info->relocatable || info->shared)
5293 return TRUE;
5294
5295 htab = ppc_hash_table (info);
5296 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5297 {
5298 Elf_Internal_Sym *locsyms = NULL;
5299
5300 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5301 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5302 {
5303 Elf_Internal_Rela *relstart, *rel, *relend;
5304 int expecting_tls_get_addr;
5305
5306 /* Read the relocations. */
5307 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5308 info->keep_memory);
5309 if (relstart == NULL)
5310 return FALSE;
5311
5312 expecting_tls_get_addr = 0;
5313 relend = relstart + sec->reloc_count;
5314 for (rel = relstart; rel < relend; rel++)
5315 {
5316 enum elf_ppc64_reloc_type r_type;
5317 unsigned long r_symndx;
5318 struct elf_link_hash_entry *h;
5319 Elf_Internal_Sym *sym;
5320 asection *sym_sec;
5321 char *tls_mask;
5322 char tls_set, tls_clear, tls_type = 0;
5323 bfd_vma value;
5324 bfd_boolean ok_tprel, is_local;
5325
5326 r_symndx = ELF64_R_SYM (rel->r_info);
5327 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5328 r_symndx, ibfd))
5329 {
5330 err_free_rel:
5331 if (elf_section_data (sec)->relocs != relstart)
5332 free (relstart);
5333 if (locsyms != NULL
5334 && (elf_tdata (ibfd)->symtab_hdr.contents
5335 != (unsigned char *) locsyms))
5336 free (locsyms);
5337 return FALSE;
5338 }
5339
5340 if (h != NULL)
5341 {
5342 if (h->root.type != bfd_link_hash_defined
5343 && h->root.type != bfd_link_hash_defweak)
5344 continue;
5345 value = h->root.u.def.value;
5346 }
5347 else
5348 {
5349 value = sym->st_value;
5350
5351 if (elf_section_data (sym_sec) != NULL)
5352 {
5353 long *adjust;
5354 adjust = ppc64_elf_section_data (sym_sec)->opd.adjust;
5355 if (adjust != NULL)
5356 value += adjust[value / 24];
5357 }
5358 }
5359
5360 ok_tprel = FALSE;
5361 is_local = FALSE;
5362 if (h == NULL
5363 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5364 {
5365 is_local = TRUE;
5366 value += sym_sec->output_offset;
5367 value += sym_sec->output_section->vma;
5368 value -= htab->elf.tls_sec->vma;
5369 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5370 < (bfd_vma) 1 << 32);
5371 }
5372
5373 r_type = ELF64_R_TYPE (rel->r_info);
5374 switch (r_type)
5375 {
5376 case R_PPC64_GOT_TLSLD16:
5377 case R_PPC64_GOT_TLSLD16_LO:
5378 case R_PPC64_GOT_TLSLD16_HI:
5379 case R_PPC64_GOT_TLSLD16_HA:
5380 /* These relocs should never be against a symbol
5381 defined in a shared lib. Leave them alone if
5382 that turns out to be the case. */
5383 ppc64_tlsld_got (ibfd)->refcount -= 1;
5384 if (!is_local)
5385 continue;
5386
5387 /* LD -> LE */
5388 tls_set = 0;
5389 tls_clear = TLS_LD;
5390 tls_type = TLS_TLS | TLS_LD;
5391 expecting_tls_get_addr = 1;
5392 break;
5393
5394 case R_PPC64_GOT_TLSGD16:
5395 case R_PPC64_GOT_TLSGD16_LO:
5396 case R_PPC64_GOT_TLSGD16_HI:
5397 case R_PPC64_GOT_TLSGD16_HA:
5398 if (ok_tprel)
5399 /* GD -> LE */
5400 tls_set = 0;
5401 else
5402 /* GD -> IE */
5403 tls_set = TLS_TLS | TLS_TPRELGD;
5404 tls_clear = TLS_GD;
5405 tls_type = TLS_TLS | TLS_GD;
5406 expecting_tls_get_addr = 1;
5407 break;
5408
5409 case R_PPC64_GOT_TPREL16_DS:
5410 case R_PPC64_GOT_TPREL16_LO_DS:
5411 case R_PPC64_GOT_TPREL16_HI:
5412 case R_PPC64_GOT_TPREL16_HA:
5413 expecting_tls_get_addr = 0;
5414 if (ok_tprel)
5415 {
5416 /* IE -> LE */
5417 tls_set = 0;
5418 tls_clear = TLS_TPREL;
5419 tls_type = TLS_TLS | TLS_TPREL;
5420 break;
5421 }
5422 else
5423 continue;
5424
5425 case R_PPC64_REL14:
5426 case R_PPC64_REL14_BRTAKEN:
5427 case R_PPC64_REL14_BRNTAKEN:
5428 case R_PPC64_REL24:
5429 if (h != NULL
5430 && h == htab->tls_get_addr)
5431 {
5432 if (!expecting_tls_get_addr
5433 && rel != relstart
5434 && ((ELF64_R_TYPE (rel[-1].r_info)
5435 == R_PPC64_TOC16)
5436 || (ELF64_R_TYPE (rel[-1].r_info)
5437 == R_PPC64_TOC16_LO)))
5438 {
5439 /* Check for toc tls entries. */
5440 char *toc_tls;
5441 int retval;
5442
5443 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
5444 rel - 1, ibfd);
5445 if (retval == 0)
5446 goto err_free_rel;
5447 if (toc_tls != NULL)
5448 expecting_tls_get_addr = retval > 1;
5449 }
5450
5451 if (expecting_tls_get_addr)
5452 {
5453 struct plt_entry *ent;
5454 for (ent = h->plt.plist; ent; ent = ent->next)
5455 if (ent->addend == 0)
5456 {
5457 if (ent->plt.refcount > 0)
5458 ent->plt.refcount -= 1;
5459 break;
5460 }
5461 }
5462 }
5463 expecting_tls_get_addr = 0;
5464 continue;
5465
5466 case R_PPC64_TPREL64:
5467 expecting_tls_get_addr = 0;
5468 if (ok_tprel)
5469 {
5470 /* IE -> LE */
5471 tls_set = TLS_EXPLICIT;
5472 tls_clear = TLS_TPREL;
5473 break;
5474 }
5475 else
5476 continue;
5477
5478 case R_PPC64_DTPMOD64:
5479 expecting_tls_get_addr = 0;
5480 if (rel + 1 < relend
5481 && (rel[1].r_info
5482 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5483 && rel[1].r_offset == rel->r_offset + 8)
5484 {
5485 if (ok_tprel)
5486 /* GD -> LE */
5487 tls_set = TLS_EXPLICIT | TLS_GD;
5488 else
5489 /* GD -> IE */
5490 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5491 tls_clear = TLS_GD;
5492 }
5493 else
5494 {
5495 if (!is_local)
5496 continue;
5497
5498 /* LD -> LE */
5499 tls_set = TLS_EXPLICIT;
5500 tls_clear = TLS_LD;
5501 }
5502 break;
5503
5504 default:
5505 expecting_tls_get_addr = 0;
5506 continue;
5507 }
5508
5509 if ((tls_set & TLS_EXPLICIT) == 0)
5510 {
5511 struct got_entry *ent;
5512
5513 /* Adjust got entry for this reloc. */
5514 if (h != NULL)
5515 ent = h->got.glist;
5516 else
5517 ent = elf_local_got_ents (ibfd)[r_symndx];
5518
5519 for (; ent != NULL; ent = ent->next)
5520 if (ent->addend == rel->r_addend
5521 && ent->owner == ibfd
5522 && ent->tls_type == tls_type)
5523 break;
5524 if (ent == NULL)
5525 abort ();
5526
5527 if (tls_set == 0)
5528 {
5529 /* We managed to get rid of a got entry. */
5530 if (ent->got.refcount > 0)
5531 ent->got.refcount -= 1;
5532 }
5533 }
5534 else if (h != NULL)
5535 {
5536 struct ppc_link_hash_entry * eh;
5537 struct ppc_dyn_relocs **pp;
5538 struct ppc_dyn_relocs *p;
5539
5540 /* Adjust dynamic relocs. */
5541 eh = (struct ppc_link_hash_entry *) h;
5542 for (pp = &eh->dyn_relocs;
5543 (p = *pp) != NULL;
5544 pp = &p->next)
5545 if (p->sec == sec)
5546 {
5547 /* If we got rid of a DTPMOD/DTPREL reloc
5548 pair then we'll lose one or two dyn
5549 relocs. */
5550 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5551 p->count -= 1;
5552 p->count -= 1;
5553 if (p->count == 0)
5554 *pp = p->next;
5555 break;
5556 }
5557 }
5558
5559 *tls_mask |= tls_set;
5560 *tls_mask &= ~tls_clear;
5561 }
5562
5563 if (elf_section_data (sec)->relocs != relstart)
5564 free (relstart);
5565 }
5566
5567 if (locsyms != NULL
5568 && (elf_tdata (ibfd)->symtab_hdr.contents
5569 != (unsigned char *) locsyms))
5570 {
5571 if (!info->keep_memory)
5572 free (locsyms);
5573 else
5574 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5575 }
5576 }
5577 return TRUE;
5578 }
5579
5580 /* Allocate space in .plt, .got and associated reloc sections for
5581 dynamic relocs. */
5582
5583 static bfd_boolean
5584 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5585 {
5586 struct bfd_link_info *info;
5587 struct ppc_link_hash_table *htab;
5588 asection *s;
5589 struct ppc_link_hash_entry *eh;
5590 struct ppc_dyn_relocs *p;
5591 struct got_entry *gent;
5592
5593 if (h->root.type == bfd_link_hash_indirect)
5594 return TRUE;
5595
5596 if (h->root.type == bfd_link_hash_warning)
5597 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5598
5599 info = (struct bfd_link_info *) inf;
5600 htab = ppc_hash_table (info);
5601
5602 if (htab->elf.dynamic_sections_created
5603 && h->dynindx != -1
5604 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5605 {
5606 struct plt_entry *pent;
5607 bfd_boolean doneone = FALSE;
5608 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5609 if (pent->plt.refcount > 0)
5610 {
5611 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5612
5613 /* If this is the first .plt entry, make room for the special
5614 first entry. */
5615 s = htab->plt;
5616 if (s->size == 0)
5617 s->size += PLT_INITIAL_ENTRY_SIZE;
5618
5619 pent->plt.offset = s->size;
5620
5621 /* Make room for this entry. */
5622 s->size += PLT_ENTRY_SIZE;
5623
5624 /* Make room for the .glink code. */
5625 s = htab->glink;
5626 if (s->size == 0)
5627 s->size += GLINK_CALL_STUB_SIZE;
5628 /* We need bigger stubs past index 32767. */
5629 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5630 s->size += 4;
5631 s->size += 2*4;
5632
5633 /* We also need to make an entry in the .rela.plt section. */
5634 s = htab->relplt;
5635 s->size += sizeof (Elf64_External_Rela);
5636 doneone = TRUE;
5637 }
5638 else
5639 pent->plt.offset = (bfd_vma) -1;
5640 if (!doneone)
5641 {
5642 h->plt.plist = NULL;
5643 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5644 }
5645 }
5646 else
5647 {
5648 h->plt.plist = NULL;
5649 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5650 }
5651
5652 eh = (struct ppc_link_hash_entry *) h;
5653 /* Run through the TLS GD got entries first if we're changing them
5654 to TPREL. */
5655 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5656 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5657 if (gent->got.refcount > 0
5658 && (gent->tls_type & TLS_GD) != 0)
5659 {
5660 /* This was a GD entry that has been converted to TPREL. If
5661 there happens to be a TPREL entry we can use that one. */
5662 struct got_entry *ent;
5663 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5664 if (ent->got.refcount > 0
5665 && (ent->tls_type & TLS_TPREL) != 0
5666 && ent->addend == gent->addend
5667 && ent->owner == gent->owner)
5668 {
5669 gent->got.refcount = 0;
5670 break;
5671 }
5672
5673 /* If not, then we'll be using our own TPREL entry. */
5674 if (gent->got.refcount != 0)
5675 gent->tls_type = TLS_TLS | TLS_TPREL;
5676 }
5677
5678 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5679 if (gent->got.refcount > 0)
5680 {
5681 bfd_boolean dyn;
5682
5683 /* Make sure this symbol is output as a dynamic symbol.
5684 Undefined weak syms won't yet be marked as dynamic,
5685 nor will all TLS symbols. */
5686 if (h->dynindx == -1
5687 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5688 {
5689 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5690 return FALSE;
5691 }
5692
5693 if ((gent->tls_type & TLS_LD) != 0
5694 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5695 {
5696 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5697 continue;
5698 }
5699
5700 s = ppc64_elf_tdata (gent->owner)->got;
5701 gent->got.offset = s->size;
5702 s->size
5703 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5704 dyn = htab->elf.dynamic_sections_created;
5705 if ((info->shared
5706 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5707 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5708 || h->root.type != bfd_link_hash_undefweak))
5709 ppc64_elf_tdata (gent->owner)->relgot->size
5710 += (gent->tls_type & eh->tls_mask & TLS_GD
5711 ? 2 * sizeof (Elf64_External_Rela)
5712 : sizeof (Elf64_External_Rela));
5713 }
5714 else
5715 gent->got.offset = (bfd_vma) -1;
5716
5717 if (eh->dyn_relocs == NULL)
5718 return TRUE;
5719
5720 /* In the shared -Bsymbolic case, discard space allocated for
5721 dynamic pc-relative relocs against symbols which turn out to be
5722 defined in regular objects. For the normal shared case, discard
5723 space for relocs that have become local due to symbol visibility
5724 changes. */
5725
5726 if (info->shared)
5727 {
5728 /* Relocs that use pc_count are those that appear on a call insn,
5729 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5730 generated via assembly. We want calls to protected symbols to
5731 resolve directly to the function rather than going via the plt.
5732 If people want function pointer comparisons to work as expected
5733 then they should avoid writing weird assembly. */
5734 if (SYMBOL_CALLS_LOCAL (info, h))
5735 {
5736 struct ppc_dyn_relocs **pp;
5737
5738 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5739 {
5740 p->count -= p->pc_count;
5741 p->pc_count = 0;
5742 if (p->count == 0)
5743 *pp = p->next;
5744 else
5745 pp = &p->next;
5746 }
5747 }
5748
5749 /* Also discard relocs on undefined weak syms with non-default
5750 visibility. */
5751 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5752 && h->root.type == bfd_link_hash_undefweak)
5753 eh->dyn_relocs = NULL;
5754 }
5755 else if (ELIMINATE_COPY_RELOCS)
5756 {
5757 /* For the non-shared case, discard space for relocs against
5758 symbols which turn out to need copy relocs or are not
5759 dynamic. */
5760
5761 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5762 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5763 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5764 {
5765 /* Make sure this symbol is output as a dynamic symbol.
5766 Undefined weak syms won't yet be marked as dynamic. */
5767 if (h->dynindx == -1
5768 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5769 {
5770 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5771 return FALSE;
5772 }
5773
5774 /* If that succeeded, we know we'll be keeping all the
5775 relocs. */
5776 if (h->dynindx != -1)
5777 goto keep;
5778 }
5779
5780 eh->dyn_relocs = NULL;
5781
5782 keep: ;
5783 }
5784
5785 /* Finally, allocate space. */
5786 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5787 {
5788 asection *sreloc = elf_section_data (p->sec)->sreloc;
5789 sreloc->size += p->count * sizeof (Elf64_External_Rela);
5790 }
5791
5792 return TRUE;
5793 }
5794
5795 /* Find any dynamic relocs that apply to read-only sections. */
5796
5797 static bfd_boolean
5798 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5799 {
5800 struct ppc_link_hash_entry *eh;
5801 struct ppc_dyn_relocs *p;
5802
5803 if (h->root.type == bfd_link_hash_warning)
5804 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5805
5806 eh = (struct ppc_link_hash_entry *) h;
5807 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5808 {
5809 asection *s = p->sec->output_section;
5810
5811 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5812 {
5813 struct bfd_link_info *info = inf;
5814
5815 info->flags |= DF_TEXTREL;
5816
5817 /* Not an error, just cut short the traversal. */
5818 return FALSE;
5819 }
5820 }
5821 return TRUE;
5822 }
5823
5824 /* Set the sizes of the dynamic sections. */
5825
5826 static bfd_boolean
5827 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5828 struct bfd_link_info *info)
5829 {
5830 struct ppc_link_hash_table *htab;
5831 bfd *dynobj;
5832 asection *s;
5833 bfd_boolean relocs;
5834 bfd *ibfd;
5835
5836 htab = ppc_hash_table (info);
5837 dynobj = htab->elf.dynobj;
5838 if (dynobj == NULL)
5839 abort ();
5840
5841 if (htab->elf.dynamic_sections_created)
5842 {
5843 /* Set the contents of the .interp section to the interpreter. */
5844 if (info->executable)
5845 {
5846 s = bfd_get_section_by_name (dynobj, ".interp");
5847 if (s == NULL)
5848 abort ();
5849 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5850 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5851 }
5852 }
5853
5854 /* Set up .got offsets for local syms, and space for local dynamic
5855 relocs. */
5856 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5857 {
5858 struct got_entry **lgot_ents;
5859 struct got_entry **end_lgot_ents;
5860 char *lgot_masks;
5861 bfd_size_type locsymcount;
5862 Elf_Internal_Shdr *symtab_hdr;
5863 asection *srel;
5864
5865 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5866 continue;
5867
5868 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5869 {
5870 s = ppc64_elf_tdata (ibfd)->got;
5871 ppc64_tlsld_got (ibfd)->offset = s->size;
5872 s->size += 16;
5873 if (info->shared)
5874 {
5875 srel = ppc64_elf_tdata (ibfd)->relgot;
5876 srel->size += sizeof (Elf64_External_Rela);
5877 }
5878 }
5879 else
5880 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5881
5882 for (s = ibfd->sections; s != NULL; s = s->next)
5883 {
5884 struct ppc_dyn_relocs *p;
5885
5886 for (p = *((struct ppc_dyn_relocs **)
5887 &elf_section_data (s)->local_dynrel);
5888 p != NULL;
5889 p = p->next)
5890 {
5891 if (!bfd_is_abs_section (p->sec)
5892 && bfd_is_abs_section (p->sec->output_section))
5893 {
5894 /* Input section has been discarded, either because
5895 it is a copy of a linkonce section or due to
5896 linker script /DISCARD/, so we'll be discarding
5897 the relocs too. */
5898 }
5899 else if (p->count != 0)
5900 {
5901 srel = elf_section_data (p->sec)->sreloc;
5902 srel->size += p->count * sizeof (Elf64_External_Rela);
5903 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5904 info->flags |= DF_TEXTREL;
5905 }
5906 }
5907 }
5908
5909 lgot_ents = elf_local_got_ents (ibfd);
5910 if (!lgot_ents)
5911 continue;
5912
5913 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5914 locsymcount = symtab_hdr->sh_info;
5915 end_lgot_ents = lgot_ents + locsymcount;
5916 lgot_masks = (char *) end_lgot_ents;
5917 s = ppc64_elf_tdata (ibfd)->got;
5918 srel = ppc64_elf_tdata (ibfd)->relgot;
5919 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5920 {
5921 struct got_entry *ent;
5922
5923 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5924 if (ent->got.refcount > 0)
5925 {
5926 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5927 {
5928 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5929 {
5930 ppc64_tlsld_got (ibfd)->offset = s->size;
5931 s->size += 16;
5932 if (info->shared)
5933 srel->size += sizeof (Elf64_External_Rela);
5934 }
5935 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5936 }
5937 else
5938 {
5939 ent->got.offset = s->size;
5940 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5941 {
5942 s->size += 16;
5943 if (info->shared)
5944 srel->size += 2 * sizeof (Elf64_External_Rela);
5945 }
5946 else
5947 {
5948 s->size += 8;
5949 if (info->shared)
5950 srel->size += sizeof (Elf64_External_Rela);
5951 }
5952 }
5953 }
5954 else
5955 ent->got.offset = (bfd_vma) -1;
5956 }
5957 }
5958
5959 /* Allocate global sym .plt and .got entries, and space for global
5960 sym dynamic relocs. */
5961 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5962
5963 /* We now have determined the sizes of the various dynamic sections.
5964 Allocate memory for them. */
5965 relocs = FALSE;
5966 for (s = dynobj->sections; s != NULL; s = s->next)
5967 {
5968 if ((s->flags & SEC_LINKER_CREATED) == 0)
5969 continue;
5970
5971 if (s == htab->brlt || s == htab->relbrlt)
5972 /* These haven't been allocated yet; don't strip. */
5973 continue;
5974 else if (s == htab->got
5975 || s == htab->plt
5976 || s == htab->glink)
5977 {
5978 /* Strip this section if we don't need it; see the
5979 comment below. */
5980 }
5981 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5982 {
5983 if (s->size == 0)
5984 {
5985 /* If we don't need this section, strip it from the
5986 output file. This is mostly to handle .rela.bss and
5987 .rela.plt. We must create both sections in
5988 create_dynamic_sections, because they must be created
5989 before the linker maps input sections to output
5990 sections. The linker does that before
5991 adjust_dynamic_symbol is called, and it is that
5992 function which decides whether anything needs to go
5993 into these sections. */
5994 }
5995 else
5996 {
5997 if (s != htab->relplt)
5998 relocs = TRUE;
5999
6000 /* We use the reloc_count field as a counter if we need
6001 to copy relocs into the output file. */
6002 s->reloc_count = 0;
6003 }
6004 }
6005 else
6006 {
6007 /* It's not one of our sections, so don't allocate space. */
6008 continue;
6009 }
6010
6011 if (s->size == 0)
6012 {
6013 _bfd_strip_section_from_output (info, s);
6014 continue;
6015 }
6016
6017 /* .plt is in the bss section. We don't initialise it. */
6018 if (s == htab->plt)
6019 continue;
6020
6021 /* Allocate memory for the section contents. We use bfd_zalloc
6022 here in case unused entries are not reclaimed before the
6023 section's contents are written out. This should not happen,
6024 but this way if it does we get a R_PPC64_NONE reloc in .rela
6025 sections instead of garbage.
6026 We also rely on the section contents being zero when writing
6027 the GOT. */
6028 s->contents = bfd_zalloc (dynobj, s->size);
6029 if (s->contents == NULL)
6030 return FALSE;
6031 }
6032
6033 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6034 {
6035 s = ppc64_elf_tdata (ibfd)->got;
6036 if (s != NULL && s != htab->got)
6037 {
6038 if (s->size == 0)
6039 _bfd_strip_section_from_output (info, s);
6040 else
6041 {
6042 s->contents = bfd_zalloc (ibfd, s->size);
6043 if (s->contents == NULL)
6044 return FALSE;
6045 }
6046 }
6047 s = ppc64_elf_tdata (ibfd)->relgot;
6048 if (s != NULL)
6049 {
6050 if (s->size == 0)
6051 _bfd_strip_section_from_output (info, s);
6052 else
6053 {
6054 s->contents = bfd_zalloc (ibfd, s->size);
6055 if (s->contents == NULL)
6056 return FALSE;
6057 relocs = TRUE;
6058 s->reloc_count = 0;
6059 }
6060 }
6061 }
6062
6063 if (htab->elf.dynamic_sections_created)
6064 {
6065 /* Add some entries to the .dynamic section. We fill in the
6066 values later, in ppc64_elf_finish_dynamic_sections, but we
6067 must add the entries now so that we get the correct size for
6068 the .dynamic section. The DT_DEBUG entry is filled in by the
6069 dynamic linker and used by the debugger. */
6070 #define add_dynamic_entry(TAG, VAL) \
6071 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6072
6073 if (info->executable)
6074 {
6075 if (!add_dynamic_entry (DT_DEBUG, 0))
6076 return FALSE;
6077 }
6078
6079 if (htab->plt != NULL && htab->plt->size != 0)
6080 {
6081 if (!add_dynamic_entry (DT_PLTGOT, 0)
6082 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6083 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6084 || !add_dynamic_entry (DT_JMPREL, 0)
6085 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
6086 return FALSE;
6087 }
6088
6089 if (NO_OPD_RELOCS)
6090 {
6091 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
6092 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
6093 return FALSE;
6094 }
6095
6096 if (relocs)
6097 {
6098 if (!add_dynamic_entry (DT_RELA, 0)
6099 || !add_dynamic_entry (DT_RELASZ, 0)
6100 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
6101 return FALSE;
6102
6103 /* If any dynamic relocs apply to a read-only section,
6104 then we need a DT_TEXTREL entry. */
6105 if ((info->flags & DF_TEXTREL) == 0)
6106 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6107
6108 if ((info->flags & DF_TEXTREL) != 0)
6109 {
6110 if (!add_dynamic_entry (DT_TEXTREL, 0))
6111 return FALSE;
6112 }
6113 }
6114 }
6115 #undef add_dynamic_entry
6116
6117 return TRUE;
6118 }
6119
6120 /* Determine the type of stub needed, if any, for a call. */
6121
6122 static inline enum ppc_stub_type
6123 ppc_type_of_stub (asection *input_sec,
6124 const Elf_Internal_Rela *rel,
6125 struct ppc_link_hash_entry **hash,
6126 bfd_vma destination)
6127 {
6128 struct ppc_link_hash_entry *h = *hash;
6129 bfd_vma location;
6130 bfd_vma branch_offset;
6131 bfd_vma max_branch_offset;
6132 enum elf_ppc64_reloc_type r_type;
6133
6134 if (h != NULL)
6135 {
6136 if (h->oh != NULL
6137 && h->oh->dynindx != -1)
6138 {
6139 struct plt_entry *ent;
6140 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6141 if (ent->addend == rel->r_addend
6142 && ent->plt.offset != (bfd_vma) -1)
6143 {
6144 *hash = (struct ppc_link_hash_entry *) h->oh;
6145 return ppc_stub_plt_call;
6146 }
6147 }
6148
6149 if (!(h->elf.root.type == bfd_link_hash_defined
6150 || h->elf.root.type == bfd_link_hash_defweak)
6151 || h->elf.root.u.def.section->output_section == NULL)
6152 return ppc_stub_none;
6153 }
6154
6155 /* Determine where the call point is. */
6156 location = (input_sec->output_offset
6157 + input_sec->output_section->vma
6158 + rel->r_offset);
6159
6160 branch_offset = destination - location;
6161 r_type = ELF64_R_TYPE (rel->r_info);
6162
6163 /* Determine if a long branch stub is needed. */
6164 max_branch_offset = 1 << 25;
6165 if (r_type != R_PPC64_REL24)
6166 max_branch_offset = 1 << 15;
6167
6168 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6169 /* We need a stub. Figure out whether a long_branch or plt_branch
6170 is needed later. */
6171 return ppc_stub_long_branch;
6172
6173 return ppc_stub_none;
6174 }
6175
6176 /* Build a .plt call stub. */
6177
6178 static inline bfd_byte *
6179 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6180 {
6181 #define PPC_LO(v) ((v) & 0xffff)
6182 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6183 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6184
6185 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6186 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6187 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6188 if (PPC_HA (offset + 8) != PPC_HA (offset))
6189 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6190 offset += 8;
6191 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6192 if (PPC_HA (offset + 8) != PPC_HA (offset))
6193 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6194 offset += 8;
6195 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6196 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6197 bfd_put_32 (obfd, BCTR, p), p += 4;
6198 return p;
6199 }
6200
6201 static bfd_boolean
6202 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6203 {
6204 struct ppc_stub_hash_entry *stub_entry;
6205 struct ppc_branch_hash_entry *br_entry;
6206 struct bfd_link_info *info;
6207 struct ppc_link_hash_table *htab;
6208 bfd_byte *loc;
6209 bfd_byte *p;
6210 unsigned int indx;
6211 struct plt_entry *ent;
6212 bfd_vma off;
6213 int size;
6214
6215 /* Massage our args to the form they really have. */
6216 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6217 info = in_arg;
6218
6219 htab = ppc_hash_table (info);
6220
6221 /* Make a note of the offset within the stubs for this entry. */
6222 stub_entry->stub_offset = stub_entry->stub_sec->size;
6223 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
6224
6225 htab->stub_count[stub_entry->stub_type - 1] += 1;
6226 switch (stub_entry->stub_type)
6227 {
6228 case ppc_stub_long_branch:
6229 case ppc_stub_long_branch_r2off:
6230 /* Branches are relative. This is where we are going to. */
6231 off = (stub_entry->target_value
6232 + stub_entry->target_section->output_offset
6233 + stub_entry->target_section->output_section->vma);
6234
6235 /* And this is where we are coming from. */
6236 off -= (stub_entry->stub_offset
6237 + stub_entry->stub_sec->output_offset
6238 + stub_entry->stub_sec->output_section->vma);
6239
6240 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6241 size = 4;
6242 else
6243 {
6244 bfd_vma r2off;
6245
6246 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6247 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6248 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6249 loc += 4;
6250 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6251 loc += 4;
6252 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6253 loc += 4;
6254 off -= 12;
6255 size = 16;
6256 }
6257 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6258
6259 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6260 break;
6261
6262 case ppc_stub_plt_branch:
6263 case ppc_stub_plt_branch_r2off:
6264 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6265 stub_entry->root.string + 9,
6266 FALSE, FALSE);
6267 if (br_entry == NULL)
6268 {
6269 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6270 stub_entry->root.string + 9);
6271 htab->stub_error = TRUE;
6272 return FALSE;
6273 }
6274
6275 off = (stub_entry->target_value
6276 + stub_entry->target_section->output_offset
6277 + stub_entry->target_section->output_section->vma);
6278
6279 bfd_put_64 (htab->brlt->owner, off,
6280 htab->brlt->contents + br_entry->offset);
6281
6282 if (info->shared)
6283 {
6284 /* Create a reloc for the branch lookup table entry. */
6285 Elf_Internal_Rela rela;
6286 bfd_byte *rl;
6287
6288 rela.r_offset = (br_entry->offset
6289 + htab->brlt->output_offset
6290 + htab->brlt->output_section->vma);
6291 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6292 rela.r_addend = off;
6293
6294 rl = htab->relbrlt->contents;
6295 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6296 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6297 }
6298
6299 off = (br_entry->offset
6300 + htab->brlt->output_offset
6301 + htab->brlt->output_section->vma
6302 - elf_gp (htab->brlt->output_section->owner)
6303 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6304
6305 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6306 {
6307 (*_bfd_error_handler)
6308 (_("linkage table error against `%s'"),
6309 stub_entry->root.string);
6310 bfd_set_error (bfd_error_bad_value);
6311 htab->stub_error = TRUE;
6312 return FALSE;
6313 }
6314
6315 indx = off;
6316 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6317 {
6318 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6319 loc += 4;
6320 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6321 size = 16;
6322 }
6323 else
6324 {
6325 bfd_vma r2off;
6326
6327 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6328 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6329 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6330 loc += 4;
6331 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6332 loc += 4;
6333 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6334 loc += 4;
6335 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6336 loc += 4;
6337 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6338 size = 28;
6339 }
6340 loc += 4;
6341 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
6342 loc += 4;
6343 bfd_put_32 (htab->stub_bfd, BCTR, loc);
6344 break;
6345
6346 case ppc_stub_plt_call:
6347 /* Do the best we can for shared libraries built without
6348 exporting ".foo" for each "foo". This can happen when symbol
6349 versioning scripts strip all bar a subset of symbols. */
6350 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6351 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6352 {
6353 /* Point the symbol at the stub. There may be multiple stubs,
6354 we don't really care; The main thing is to make this sym
6355 defined somewhere. Maybe defining the symbol in the stub
6356 section is a silly idea. If we didn't do this, htab->top_id
6357 could disappear. */
6358 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6359 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6360 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6361 }
6362
6363 /* Now build the stub. */
6364 off = (bfd_vma) -1;
6365 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6366 if (ent->addend == stub_entry->addend)
6367 {
6368 off = ent->plt.offset;
6369 break;
6370 }
6371 if (off >= (bfd_vma) -2)
6372 abort ();
6373
6374 off &= ~ (bfd_vma) 1;
6375 off += (htab->plt->output_offset
6376 + htab->plt->output_section->vma
6377 - elf_gp (htab->plt->output_section->owner)
6378 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6379
6380 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6381 {
6382 (*_bfd_error_handler)
6383 (_("linkage table error against `%s'"),
6384 stub_entry->h->elf.root.root.string);
6385 bfd_set_error (bfd_error_bad_value);
6386 htab->stub_error = TRUE;
6387 return FALSE;
6388 }
6389
6390 p = build_plt_stub (htab->stub_bfd, loc, off);
6391 size = p - loc;
6392 break;
6393
6394 default:
6395 BFD_FAIL ();
6396 return FALSE;
6397 }
6398
6399 stub_entry->stub_sec->size += size;
6400
6401 if (htab->emit_stub_syms
6402 && !(stub_entry->stub_type == ppc_stub_plt_call
6403 && stub_entry->h->oh->root.type == bfd_link_hash_defined
6404 && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec
6405 && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset))
6406 {
6407 struct elf_link_hash_entry *h;
6408 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6409 TRUE, FALSE, FALSE);
6410 if (h == NULL)
6411 return FALSE;
6412 if (h->root.type == bfd_link_hash_new)
6413 {
6414 h->root.type = bfd_link_hash_defined;
6415 h->root.u.def.section = stub_entry->stub_sec;
6416 h->root.u.def.value = stub_entry->stub_offset;
6417 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6418 | ELF_LINK_HASH_DEF_REGULAR
6419 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6420 | ELF_LINK_FORCED_LOCAL);
6421 }
6422 }
6423
6424 return TRUE;
6425 }
6426
6427 /* As above, but don't actually build the stub. Just bump offset so
6428 we know stub section sizes, and select plt_branch stubs where
6429 long_branch stubs won't do. */
6430
6431 static bfd_boolean
6432 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6433 {
6434 struct ppc_stub_hash_entry *stub_entry;
6435 struct bfd_link_info *info;
6436 struct ppc_link_hash_table *htab;
6437 bfd_vma off;
6438 int size;
6439
6440 /* Massage our args to the form they really have. */
6441 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6442 info = in_arg;
6443
6444 htab = ppc_hash_table (info);
6445
6446 if (stub_entry->stub_type == ppc_stub_plt_call)
6447 {
6448 struct plt_entry *ent;
6449 off = (bfd_vma) -1;
6450 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6451 if (ent->addend == stub_entry->addend)
6452 {
6453 off = ent->plt.offset & ~(bfd_vma) 1;
6454 break;
6455 }
6456 if (off >= (bfd_vma) -2)
6457 abort ();
6458 off += (htab->plt->output_offset
6459 + htab->plt->output_section->vma
6460 - elf_gp (htab->plt->output_section->owner)
6461 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6462
6463 size = PLT_CALL_STUB_SIZE;
6464 if (PPC_HA (off + 16) != PPC_HA (off))
6465 size += 4;
6466 }
6467 else
6468 {
6469 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6470 variants. */
6471 off = (stub_entry->target_value
6472 + stub_entry->target_section->output_offset
6473 + stub_entry->target_section->output_section->vma);
6474 off -= (stub_entry->stub_sec->size
6475 + stub_entry->stub_sec->output_offset
6476 + stub_entry->stub_sec->output_section->vma);
6477
6478 /* Reset the stub type from the plt variant in case we now
6479 can reach with a shorter stub. */
6480 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6481 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6482
6483 size = 4;
6484 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6485 {
6486 off -= 12;
6487 size = 16;
6488 }
6489
6490 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6491 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6492 {
6493 struct ppc_branch_hash_entry *br_entry;
6494
6495 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6496 stub_entry->root.string + 9,
6497 TRUE, FALSE);
6498 if (br_entry == NULL)
6499 {
6500 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6501 stub_entry->root.string + 9);
6502 htab->stub_error = TRUE;
6503 return FALSE;
6504 }
6505
6506 if (br_entry->iter != htab->stub_iteration)
6507 {
6508 br_entry->iter = htab->stub_iteration;
6509 br_entry->offset = htab->brlt->size;
6510 htab->brlt->size += 8;
6511
6512 if (info->shared)
6513 htab->relbrlt->size += sizeof (Elf64_External_Rela);
6514 }
6515
6516 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6517 size = 16;
6518 if (stub_entry->stub_type != ppc_stub_plt_branch)
6519 size = 28;
6520 }
6521 }
6522
6523 stub_entry->stub_sec->size += size;
6524 return TRUE;
6525 }
6526
6527 /* Set up various things so that we can make a list of input sections
6528 for each output section included in the link. Returns -1 on error,
6529 0 when no stubs will be needed, and 1 on success. */
6530
6531 int
6532 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6533 {
6534 bfd *input_bfd;
6535 int top_id, top_index, id;
6536 asection *section;
6537 asection **input_list;
6538 bfd_size_type amt;
6539 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6540
6541 if (htab->brlt == NULL)
6542 return 0;
6543
6544 /* Find the top input section id. */
6545 for (input_bfd = info->input_bfds, top_id = 3;
6546 input_bfd != NULL;
6547 input_bfd = input_bfd->link_next)
6548 {
6549 for (section = input_bfd->sections;
6550 section != NULL;
6551 section = section->next)
6552 {
6553 if (top_id < section->id)
6554 top_id = section->id;
6555 }
6556 }
6557
6558 htab->top_id = top_id;
6559 amt = sizeof (struct map_stub) * (top_id + 1);
6560 htab->stub_group = bfd_zmalloc (amt);
6561 if (htab->stub_group == NULL)
6562 return -1;
6563
6564 /* Set toc_off for com, und, abs and ind sections. */
6565 for (id = 0; id < 3; id++)
6566 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6567
6568 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6569
6570 /* We can't use output_bfd->section_count here to find the top output
6571 section index as some sections may have been removed, and
6572 _bfd_strip_section_from_output doesn't renumber the indices. */
6573 for (section = output_bfd->sections, top_index = 0;
6574 section != NULL;
6575 section = section->next)
6576 {
6577 if (top_index < section->index)
6578 top_index = section->index;
6579 }
6580
6581 htab->top_index = top_index;
6582 amt = sizeof (asection *) * (top_index + 1);
6583 input_list = bfd_zmalloc (amt);
6584 htab->input_list = input_list;
6585 if (input_list == NULL)
6586 return -1;
6587
6588 return 1;
6589 }
6590
6591 /* The linker repeatedly calls this function for each TOC input section
6592 and linker generated GOT section. Group input bfds such that the toc
6593 within a group is less than 64k in size. Will break with cute linker
6594 scripts that play games with dot in the output toc section. */
6595
6596 void
6597 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6598 {
6599 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6600
6601 if (!htab->no_multi_toc)
6602 {
6603 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6604 bfd_vma off = addr - htab->toc_curr;
6605 if (off + isec->size > 0x10000)
6606 {
6607 htab->toc_curr = addr;
6608 htab->multi_toc_needed = 1;
6609 }
6610 elf_gp (isec->owner) = (htab->toc_curr
6611 - elf_gp (isec->output_section->owner)
6612 + TOC_BASE_OFF);
6613 }
6614 }
6615
6616 /* Called after the last call to the above function. */
6617
6618 void
6619 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6620 struct bfd_link_info *info)
6621 {
6622 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6623
6624 /* toc_curr tracks the TOC offset used for code sections below in
6625 ppc64_elf_next_input_section. Start off at 0x8000. */
6626 htab->toc_curr = TOC_BASE_OFF;
6627 }
6628
6629 /* No toc references were found in ISEC. If the code in ISEC makes no
6630 calls, then there's no need to use toc adjusting stubs when branching
6631 into ISEC. Actually, indirect calls from ISEC are OK as they will
6632 load r2. */
6633
6634 static int
6635 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6636 {
6637 bfd_byte *contents;
6638 bfd_size_type i;
6639 int ret;
6640 int branch_ok;
6641
6642 /* We know none of our code bearing sections will need toc stubs. */
6643 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6644 return 0;
6645
6646 if (isec->size == 0)
6647 return 0;
6648
6649 /* Hack for linux kernel. .fixup contains branches, but only back to
6650 the function that hit an exception. */
6651 branch_ok = strcmp (isec->name, ".fixup") == 0;
6652
6653 contents = elf_section_data (isec)->this_hdr.contents;
6654 if (contents == NULL)
6655 {
6656 if (!bfd_malloc_and_get_section (isec->owner, isec, &contents))
6657 {
6658 if (contents != NULL)
6659 free (contents);
6660 return -1;
6661 }
6662 if (info->keep_memory)
6663 elf_section_data (isec)->this_hdr.contents = contents;
6664 }
6665
6666 /* Code scan, because we don't necessarily have relocs on calls to
6667 static functions. */
6668 ret = 0;
6669 for (i = 0; i < isec->size; i += 4)
6670 {
6671 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6672 /* Is this a branch? */
6673 if ((insn & (0x3f << 26)) == (18 << 26)
6674 /* If branch and link, it's a function call. */
6675 && ((insn & 1) != 0
6676 /* Sibling calls use a plain branch. I don't know a way
6677 of deciding whether a branch is really a sibling call. */
6678 || !branch_ok))
6679 {
6680 ret = 1;
6681 break;
6682 }
6683 }
6684
6685 if (elf_section_data (isec)->this_hdr.contents != contents)
6686 free (contents);
6687 return ret;
6688 }
6689
6690 /* The linker repeatedly calls this function for each input section,
6691 in the order that input sections are linked into output sections.
6692 Build lists of input sections to determine groupings between which
6693 we may insert linker stubs. */
6694
6695 bfd_boolean
6696 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6697 {
6698 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6699 int ret;
6700
6701 if ((isec->output_section->flags & SEC_CODE) != 0
6702 && isec->output_section->index <= htab->top_index)
6703 {
6704 asection **list = htab->input_list + isec->output_section->index;
6705 /* Steal the link_sec pointer for our list. */
6706 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6707 /* This happens to make the list in reverse order,
6708 which is what we want. */
6709 PREV_SEC (isec) = *list;
6710 *list = isec;
6711 }
6712
6713 /* If a code section has a function that uses the TOC then we need
6714 to use the right TOC (obviously). Also, make sure that .opd gets
6715 the correct TOC value for R_PPC64_TOC relocs that don't have or
6716 can't find their function symbol (shouldn't ever happen now). */
6717 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6718 {
6719 if (elf_gp (isec->owner) != 0)
6720 htab->toc_curr = elf_gp (isec->owner);
6721 }
6722 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6723 return FALSE;
6724 else
6725 isec->has_gp_reloc = ret;
6726
6727 /* Functions that don't use the TOC can belong in any TOC group.
6728 Use the last TOC base. This happens to make _init and _fini
6729 pasting work. */
6730 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6731 return TRUE;
6732 }
6733
6734 /* See whether we can group stub sections together. Grouping stub
6735 sections may result in fewer stubs. More importantly, we need to
6736 put all .init* and .fini* stubs at the beginning of the .init or
6737 .fini output sections respectively, because glibc splits the
6738 _init and _fini functions into multiple parts. Putting a stub in
6739 the middle of a function is not a good idea. */
6740
6741 static void
6742 group_sections (struct ppc_link_hash_table *htab,
6743 bfd_size_type stub_group_size,
6744 bfd_boolean stubs_always_before_branch)
6745 {
6746 asection **list = htab->input_list + htab->top_index;
6747 do
6748 {
6749 asection *tail = *list;
6750 while (tail != NULL)
6751 {
6752 asection *curr;
6753 asection *prev;
6754 bfd_size_type total;
6755 bfd_boolean big_sec;
6756 bfd_vma curr_toc;
6757
6758 curr = tail;
6759 total = tail->size;
6760 big_sec = total >= stub_group_size;
6761 curr_toc = htab->stub_group[tail->id].toc_off;
6762
6763 while ((prev = PREV_SEC (curr)) != NULL
6764 && ((total += curr->output_offset - prev->output_offset)
6765 < stub_group_size)
6766 && htab->stub_group[prev->id].toc_off == curr_toc)
6767 curr = prev;
6768
6769 /* OK, the size from the start of CURR to the end is less
6770 than stub_group_size and thus can be handled by one stub
6771 section. (or the tail section is itself larger than
6772 stub_group_size, in which case we may be toast.) We
6773 should really be keeping track of the total size of stubs
6774 added here, as stubs contribute to the final output
6775 section size. That's a little tricky, and this way will
6776 only break if stubs added make the total size more than
6777 2^25, ie. for the default stub_group_size, if stubs total
6778 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6779 do
6780 {
6781 prev = PREV_SEC (tail);
6782 /* Set up this stub group. */
6783 htab->stub_group[tail->id].link_sec = curr;
6784 }
6785 while (tail != curr && (tail = prev) != NULL);
6786
6787 /* But wait, there's more! Input sections up to stub_group_size
6788 bytes before the stub section can be handled by it too.
6789 Don't do this if we have a really large section after the
6790 stubs, as adding more stubs increases the chance that
6791 branches may not reach into the stub section. */
6792 if (!stubs_always_before_branch && !big_sec)
6793 {
6794 total = 0;
6795 while (prev != NULL
6796 && ((total += tail->output_offset - prev->output_offset)
6797 < stub_group_size)
6798 && htab->stub_group[prev->id].toc_off == curr_toc)
6799 {
6800 tail = prev;
6801 prev = PREV_SEC (tail);
6802 htab->stub_group[tail->id].link_sec = curr;
6803 }
6804 }
6805 tail = prev;
6806 }
6807 }
6808 while (list-- != htab->input_list);
6809 free (htab->input_list);
6810 #undef PREV_SEC
6811 }
6812
6813 /* Determine and set the size of the stub section for a final link.
6814
6815 The basic idea here is to examine all the relocations looking for
6816 PC-relative calls to a target that is unreachable with a "bl"
6817 instruction. */
6818
6819 bfd_boolean
6820 ppc64_elf_size_stubs (bfd *output_bfd,
6821 struct bfd_link_info *info,
6822 bfd_signed_vma group_size,
6823 asection *(*add_stub_section) (const char *, asection *),
6824 void (*layout_sections_again) (void))
6825 {
6826 bfd_size_type stub_group_size;
6827 bfd_boolean stubs_always_before_branch;
6828 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6829
6830 /* Stash our params away. */
6831 htab->add_stub_section = add_stub_section;
6832 htab->layout_sections_again = layout_sections_again;
6833 stubs_always_before_branch = group_size < 0;
6834 if (group_size < 0)
6835 stub_group_size = -group_size;
6836 else
6837 stub_group_size = group_size;
6838 if (stub_group_size == 1)
6839 {
6840 /* Default values. */
6841 if (stubs_always_before_branch)
6842 {
6843 stub_group_size = 0x1e00000;
6844 if (htab->has_14bit_branch)
6845 stub_group_size = 0x7800;
6846 }
6847 else
6848 {
6849 stub_group_size = 0x1c00000;
6850 if (htab->has_14bit_branch)
6851 stub_group_size = 0x7000;
6852 }
6853 }
6854
6855 group_sections (htab, stub_group_size, stubs_always_before_branch);
6856
6857 while (1)
6858 {
6859 bfd *input_bfd;
6860 unsigned int bfd_indx;
6861 asection *stub_sec;
6862 bfd_boolean stub_changed;
6863
6864 htab->stub_iteration += 1;
6865 stub_changed = FALSE;
6866
6867 for (input_bfd = info->input_bfds, bfd_indx = 0;
6868 input_bfd != NULL;
6869 input_bfd = input_bfd->link_next, bfd_indx++)
6870 {
6871 Elf_Internal_Shdr *symtab_hdr;
6872 asection *section;
6873 Elf_Internal_Sym *local_syms = NULL;
6874
6875 /* We'll need the symbol table in a second. */
6876 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6877 if (symtab_hdr->sh_info == 0)
6878 continue;
6879
6880 /* Walk over each section attached to the input bfd. */
6881 for (section = input_bfd->sections;
6882 section != NULL;
6883 section = section->next)
6884 {
6885 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6886
6887 /* If there aren't any relocs, then there's nothing more
6888 to do. */
6889 if ((section->flags & SEC_RELOC) == 0
6890 || section->reloc_count == 0)
6891 continue;
6892
6893 /* If this section is a link-once section that will be
6894 discarded, then don't create any stubs. */
6895 if (section->output_section == NULL
6896 || section->output_section->owner != output_bfd)
6897 continue;
6898
6899 /* Get the relocs. */
6900 internal_relocs
6901 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6902 info->keep_memory);
6903 if (internal_relocs == NULL)
6904 goto error_ret_free_local;
6905
6906 /* Now examine each relocation. */
6907 irela = internal_relocs;
6908 irelaend = irela + section->reloc_count;
6909 for (; irela < irelaend; irela++)
6910 {
6911 enum elf_ppc64_reloc_type r_type;
6912 unsigned int r_indx;
6913 enum ppc_stub_type stub_type;
6914 struct ppc_stub_hash_entry *stub_entry;
6915 asection *sym_sec;
6916 bfd_vma sym_value;
6917 bfd_vma destination;
6918 struct ppc_link_hash_entry *hash;
6919 struct elf_link_hash_entry *h;
6920 Elf_Internal_Sym *sym;
6921 char *stub_name;
6922 const asection *id_sec;
6923
6924 r_type = ELF64_R_TYPE (irela->r_info);
6925 r_indx = ELF64_R_SYM (irela->r_info);
6926
6927 if (r_type >= R_PPC64_max)
6928 {
6929 bfd_set_error (bfd_error_bad_value);
6930 goto error_ret_free_internal;
6931 }
6932
6933 /* Only look for stubs on branch instructions. */
6934 if (r_type != R_PPC64_REL24
6935 && r_type != R_PPC64_REL14
6936 && r_type != R_PPC64_REL14_BRTAKEN
6937 && r_type != R_PPC64_REL14_BRNTAKEN)
6938 continue;
6939
6940 /* Now determine the call target, its name, value,
6941 section. */
6942 destination = 0;
6943 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6944 r_indx, input_bfd))
6945 goto error_ret_free_internal;
6946 hash = (struct ppc_link_hash_entry *) h;
6947
6948 if (hash == NULL)
6949 {
6950 /* It's a local symbol. */
6951 sym_value = sym->st_value;
6952 destination = (sym_value + irela->r_addend
6953 + sym_sec->output_offset
6954 + sym_sec->output_section->vma);
6955 }
6956 else
6957 {
6958 /* It's an external symbol. */
6959 sym_value = 0;
6960 if (hash->elf.root.type == bfd_link_hash_defined
6961 || hash->elf.root.type == bfd_link_hash_defweak)
6962 {
6963 sym_value = hash->elf.root.u.def.value;
6964 if (sym_sec->output_section != NULL)
6965 destination = (sym_value + irela->r_addend
6966 + sym_sec->output_offset
6967 + sym_sec->output_section->vma);
6968 }
6969 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6970 ;
6971 else if (hash->elf.root.type == bfd_link_hash_undefined)
6972 ;
6973 else
6974 {
6975 bfd_set_error (bfd_error_bad_value);
6976 goto error_ret_free_internal;
6977 }
6978 }
6979
6980 /* Determine what (if any) linker stub is needed. */
6981 stub_type = ppc_type_of_stub (section, irela, &hash,
6982 destination);
6983
6984 if (stub_type != ppc_stub_plt_call)
6985 {
6986 /* Check whether we need a TOC adjusting stub.
6987 Since the linker pastes together pieces from
6988 different object files when creating the
6989 _init and _fini functions, it may be that a
6990 call to what looks like a local sym is in
6991 fact a call needing a TOC adjustment. */
6992 if (sym_sec != NULL
6993 && sym_sec->output_section != NULL
6994 && (htab->stub_group[sym_sec->id].toc_off
6995 != htab->stub_group[section->id].toc_off)
6996 && sym_sec->has_gp_reloc
6997 && section->has_gp_reloc)
6998 stub_type = ppc_stub_long_branch_r2off;
6999 }
7000
7001 if (stub_type == ppc_stub_none)
7002 continue;
7003
7004 /* __tls_get_addr calls might be eliminated. */
7005 if (stub_type != ppc_stub_plt_call
7006 && hash != NULL
7007 && &hash->elf == htab->tls_get_addr
7008 && section->has_tls_reloc
7009 && irela != internal_relocs)
7010 {
7011 /* Get tls info. */
7012 char *tls_mask;
7013
7014 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
7015 irela - 1, input_bfd))
7016 goto error_ret_free_internal;
7017 if (*tls_mask != 0)
7018 continue;
7019 }
7020
7021 /* Support for grouping stub sections. */
7022 id_sec = htab->stub_group[section->id].link_sec;
7023
7024 /* Get the name of this stub. */
7025 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
7026 if (!stub_name)
7027 goto error_ret_free_internal;
7028
7029 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
7030 stub_name, FALSE, FALSE);
7031 if (stub_entry != NULL)
7032 {
7033 /* The proper stub has already been created. */
7034 free (stub_name);
7035 continue;
7036 }
7037
7038 stub_entry = ppc_add_stub (stub_name, section, htab);
7039 if (stub_entry == NULL)
7040 {
7041 free (stub_name);
7042 error_ret_free_internal:
7043 if (elf_section_data (section)->relocs == NULL)
7044 free (internal_relocs);
7045 error_ret_free_local:
7046 if (local_syms != NULL
7047 && (symtab_hdr->contents
7048 != (unsigned char *) local_syms))
7049 free (local_syms);
7050 return FALSE;
7051 }
7052
7053 stub_entry->stub_type = stub_type;
7054 stub_entry->target_value = sym_value;
7055 stub_entry->target_section = sym_sec;
7056 stub_entry->h = hash;
7057 stub_entry->addend = irela->r_addend;
7058 stub_changed = TRUE;
7059 }
7060
7061 /* We're done with the internal relocs, free them. */
7062 if (elf_section_data (section)->relocs != internal_relocs)
7063 free (internal_relocs);
7064 }
7065
7066 if (local_syms != NULL
7067 && symtab_hdr->contents != (unsigned char *) local_syms)
7068 {
7069 if (!info->keep_memory)
7070 free (local_syms);
7071 else
7072 symtab_hdr->contents = (unsigned char *) local_syms;
7073 }
7074 }
7075
7076 if (!stub_changed)
7077 break;
7078
7079 /* OK, we've added some stubs. Find out the new size of the
7080 stub sections. */
7081 for (stub_sec = htab->stub_bfd->sections;
7082 stub_sec != NULL;
7083 stub_sec = stub_sec->next)
7084 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7085 stub_sec->size = 0;
7086
7087 htab->brlt->size = 0;
7088 if (info->shared)
7089 htab->relbrlt->size = 0;
7090
7091 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
7092
7093 /* Ask the linker to do its stuff. */
7094 (*htab->layout_sections_again) ();
7095 }
7096
7097 /* It would be nice to strip .branch_lt from the output if the
7098 section is empty, but it's too late. If we strip sections here,
7099 the dynamic symbol table is corrupted since the section symbol
7100 for the stripped section isn't written. */
7101
7102 return TRUE;
7103 }
7104
7105 /* Called after we have determined section placement. If sections
7106 move, we'll be called again. Provide a value for TOCstart. */
7107
7108 bfd_vma
7109 ppc64_elf_toc (bfd *obfd)
7110 {
7111 asection *s;
7112 bfd_vma TOCstart;
7113
7114 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7115 order. The TOC starts where the first of these sections starts. */
7116 s = bfd_get_section_by_name (obfd, ".got");
7117 if (s == NULL)
7118 s = bfd_get_section_by_name (obfd, ".toc");
7119 if (s == NULL)
7120 s = bfd_get_section_by_name (obfd, ".tocbss");
7121 if (s == NULL)
7122 s = bfd_get_section_by_name (obfd, ".plt");
7123 if (s == NULL)
7124 {
7125 /* This may happen for
7126 o references to TOC base (SYM@toc / TOC[tc0]) without a
7127 .toc directive
7128 o bad linker script
7129 o --gc-sections and empty TOC sections
7130
7131 FIXME: Warn user? */
7132
7133 /* Look for a likely section. We probably won't even be
7134 using TOCstart. */
7135 for (s = obfd->sections; s != NULL; s = s->next)
7136 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7137 == (SEC_ALLOC | SEC_SMALL_DATA))
7138 break;
7139 if (s == NULL)
7140 for (s = obfd->sections; s != NULL; s = s->next)
7141 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7142 == (SEC_ALLOC | SEC_SMALL_DATA))
7143 break;
7144 if (s == NULL)
7145 for (s = obfd->sections; s != NULL; s = s->next)
7146 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7147 break;
7148 if (s == NULL)
7149 for (s = obfd->sections; s != NULL; s = s->next)
7150 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7151 break;
7152 }
7153
7154 TOCstart = 0;
7155 if (s != NULL)
7156 TOCstart = s->output_section->vma + s->output_offset;
7157
7158 return TOCstart;
7159 }
7160
7161 /* Build all the stubs associated with the current output file.
7162 The stubs are kept in a hash table attached to the main linker
7163 hash table. This function is called via gldelf64ppc_finish. */
7164
7165 bfd_boolean
7166 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7167 struct bfd_link_info *info,
7168 char **stats)
7169 {
7170 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7171 asection *stub_sec;
7172 bfd_byte *p;
7173 int stub_sec_count = 0;
7174
7175 htab->emit_stub_syms = emit_stub_syms;
7176
7177 /* Allocate memory to hold the linker stubs. */
7178 for (stub_sec = htab->stub_bfd->sections;
7179 stub_sec != NULL;
7180 stub_sec = stub_sec->next)
7181 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
7182 && stub_sec->size != 0)
7183 {
7184 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
7185 if (stub_sec->contents == NULL)
7186 return FALSE;
7187 /* We want to check that built size is the same as calculated
7188 size. rawsize is a convenient location to use. */
7189 stub_sec->rawsize = stub_sec->size;
7190 stub_sec->size = 0;
7191 }
7192
7193 if (htab->plt != NULL)
7194 {
7195 unsigned int indx;
7196 bfd_vma plt0;
7197
7198 /* Build the .glink plt call stub. */
7199 plt0 = (htab->plt->output_section->vma
7200 + htab->plt->output_offset
7201 - (htab->glink->output_section->vma
7202 + htab->glink->output_offset
7203 + GLINK_CALL_STUB_SIZE));
7204 if (plt0 + 0x80008000 > 0xffffffff)
7205 {
7206 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7207 bfd_set_error (bfd_error_bad_value);
7208 return FALSE;
7209 }
7210
7211 if (htab->emit_stub_syms)
7212 {
7213 struct elf_link_hash_entry *h;
7214 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
7215 if (h == NULL)
7216 return FALSE;
7217 if (h->root.type == bfd_link_hash_new)
7218 {
7219 h->root.type = bfd_link_hash_defined;
7220 h->root.u.def.section = htab->glink;
7221 h->root.u.def.value = 0;
7222 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7223 | ELF_LINK_HASH_DEF_REGULAR
7224 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7225 | ELF_LINK_FORCED_LOCAL);
7226 }
7227 }
7228 p = htab->glink->contents;
7229 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7230 p += 4;
7231 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7232 p += 4;
7233 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7234 p += 4;
7235 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7236 p += 4;
7237 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7238 p += 4;
7239 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7240 p += 4;
7241 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7242 p += 4;
7243 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7244 p += 4;
7245 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7246 p += 4;
7247 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7248 p += 4;
7249 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7250 p += 4;
7251 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7252 p += 4;
7253 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7254 p += 4;
7255 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7256 p += 4;
7257 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7258 p += 4;
7259 bfd_put_32 (htab->glink->owner, BCTR, p);
7260 p += 4;
7261
7262 /* Build the .glink lazy link call stubs. */
7263 indx = 0;
7264 while (p < htab->glink->contents + htab->glink->size)
7265 {
7266 if (indx < 0x8000)
7267 {
7268 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7269 p += 4;
7270 }
7271 else
7272 {
7273 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7274 p += 4;
7275 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7276 p += 4;
7277 }
7278 bfd_put_32 (htab->glink->owner,
7279 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7280 indx++;
7281 p += 4;
7282 }
7283 htab->glink->rawsize = p - htab->glink->contents;
7284 }
7285
7286 if (htab->brlt->size != 0)
7287 {
7288 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7289 htab->brlt->size);
7290 if (htab->brlt->contents == NULL)
7291 return FALSE;
7292 }
7293 if (info->shared && htab->relbrlt->size != 0)
7294 {
7295 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
7296 htab->relbrlt->size);
7297 if (htab->relbrlt->contents == NULL)
7298 return FALSE;
7299 }
7300
7301 /* Build the stubs as directed by the stub hash table. */
7302 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7303
7304 for (stub_sec = htab->stub_bfd->sections;
7305 stub_sec != NULL;
7306 stub_sec = stub_sec->next)
7307 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7308 {
7309 stub_sec_count += 1;
7310 if (stub_sec->rawsize != stub_sec->size)
7311 break;
7312 }
7313
7314 if (stub_sec != NULL
7315 || htab->glink->rawsize != htab->glink->size)
7316 {
7317 htab->stub_error = TRUE;
7318 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7319 }
7320
7321 if (htab->stub_error)
7322 return FALSE;
7323
7324 if (stats != NULL)
7325 {
7326 *stats = bfd_malloc (500);
7327 if (*stats == NULL)
7328 return FALSE;
7329
7330 sprintf (*stats, _("linker stubs in %u groups\n"
7331 " branch %lu\n"
7332 " toc adjust %lu\n"
7333 " long branch %lu\n"
7334 " long toc adj %lu\n"
7335 " plt call %lu"),
7336 stub_sec_count,
7337 htab->stub_count[ppc_stub_long_branch - 1],
7338 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7339 htab->stub_count[ppc_stub_plt_branch - 1],
7340 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7341 htab->stub_count[ppc_stub_plt_call - 1]);
7342 }
7343 return TRUE;
7344 }
7345
7346 /* The RELOCATE_SECTION function is called by the ELF backend linker
7347 to handle the relocations for a section.
7348
7349 The relocs are always passed as Rela structures; if the section
7350 actually uses Rel structures, the r_addend field will always be
7351 zero.
7352
7353 This function is responsible for adjust the section contents as
7354 necessary, and (if using Rela relocs and generating a
7355 relocatable output file) adjusting the reloc addend as
7356 necessary.
7357
7358 This function does not have to worry about setting the reloc
7359 address or the reloc symbol index.
7360
7361 LOCAL_SYMS is a pointer to the swapped in local symbols.
7362
7363 LOCAL_SECTIONS is an array giving the section in the input file
7364 corresponding to the st_shndx field of each local symbol.
7365
7366 The global hash table entry for the global symbols can be found
7367 via elf_sym_hashes (input_bfd).
7368
7369 When generating relocatable output, this function must handle
7370 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7371 going to be the section symbol corresponding to the output
7372 section, which means that the addend must be adjusted
7373 accordingly. */
7374
7375 static bfd_boolean
7376 ppc64_elf_relocate_section (bfd *output_bfd,
7377 struct bfd_link_info *info,
7378 bfd *input_bfd,
7379 asection *input_section,
7380 bfd_byte *contents,
7381 Elf_Internal_Rela *relocs,
7382 Elf_Internal_Sym *local_syms,
7383 asection **local_sections)
7384 {
7385 struct ppc_link_hash_table *htab;
7386 Elf_Internal_Shdr *symtab_hdr;
7387 struct elf_link_hash_entry **sym_hashes;
7388 Elf_Internal_Rela *rel;
7389 Elf_Internal_Rela *relend;
7390 Elf_Internal_Rela outrel;
7391 bfd_byte *loc;
7392 struct got_entry **local_got_ents;
7393 bfd_vma TOCstart;
7394 bfd_boolean ret = TRUE;
7395 bfd_boolean is_opd;
7396 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7397 bfd_boolean is_power4 = FALSE;
7398
7399 if (info->relocatable)
7400 return TRUE;
7401
7402 /* Initialize howto table if needed. */
7403 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7404 ppc_howto_init ();
7405
7406 htab = ppc_hash_table (info);
7407 local_got_ents = elf_local_got_ents (input_bfd);
7408 TOCstart = elf_gp (output_bfd);
7409 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7410 sym_hashes = elf_sym_hashes (input_bfd);
7411 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7412
7413 rel = relocs;
7414 relend = relocs + input_section->reloc_count;
7415 for (; rel < relend; rel++)
7416 {
7417 enum elf_ppc64_reloc_type r_type;
7418 bfd_vma addend;
7419 bfd_reloc_status_type r;
7420 Elf_Internal_Sym *sym;
7421 asection *sec;
7422 struct elf_link_hash_entry *h;
7423 struct elf_link_hash_entry *fdh;
7424 const char *sym_name;
7425 unsigned long r_symndx, toc_symndx;
7426 char tls_mask, tls_gd, tls_type;
7427 char sym_type;
7428 bfd_vma relocation;
7429 bfd_boolean unresolved_reloc;
7430 bfd_boolean warned;
7431 unsigned long insn, mask;
7432 struct ppc_stub_hash_entry *stub_entry;
7433 bfd_vma max_br_offset;
7434 bfd_vma from;
7435
7436 r_type = ELF64_R_TYPE (rel->r_info);
7437 r_symndx = ELF64_R_SYM (rel->r_info);
7438
7439 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
7440 symbol of the previous ADDR64 reloc. The symbol gives us the
7441 proper TOC base to use. */
7442 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
7443 && rel != relocs
7444 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
7445 && is_opd)
7446 r_symndx = ELF64_R_SYM (rel[-1].r_info);
7447
7448 sym = NULL;
7449 sec = NULL;
7450 h = NULL;
7451 sym_name = NULL;
7452 unresolved_reloc = FALSE;
7453 warned = FALSE;
7454
7455 if (r_symndx < symtab_hdr->sh_info)
7456 {
7457 /* It's a local symbol. */
7458 sym = local_syms + r_symndx;
7459 sec = local_sections[r_symndx];
7460 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7461 sym_type = ELF64_ST_TYPE (sym->st_info);
7462 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7463 if (elf_section_data (sec) != NULL)
7464 {
7465 long *opd_sym_adjust;
7466
7467 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7468 if (opd_sym_adjust != NULL)
7469 relocation += opd_sym_adjust[sym->st_value / 24];
7470 }
7471 }
7472 else
7473 {
7474 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7475 r_symndx, symtab_hdr, sym_hashes,
7476 h, sec, relocation,
7477 unresolved_reloc, warned);
7478 sym_name = h->root.root.string;
7479 sym_type = h->type;
7480 }
7481
7482 /* TLS optimizations. Replace instruction sequences and relocs
7483 based on information we collected in tls_optimize. We edit
7484 RELOCS so that --emit-relocs will output something sensible
7485 for the final instruction stream. */
7486 tls_mask = 0;
7487 tls_gd = 0;
7488 toc_symndx = 0;
7489 if (IS_PPC64_TLS_RELOC (r_type))
7490 {
7491 if (h != NULL)
7492 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7493 else if (local_got_ents != NULL)
7494 {
7495 char *lgot_masks;
7496 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7497 tls_mask = lgot_masks[r_symndx];
7498 }
7499 if (tls_mask == 0 && r_type == R_PPC64_TLS)
7500 {
7501 /* Check for toc tls entries. */
7502 char *toc_tls;
7503
7504 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7505 rel, input_bfd))
7506 return FALSE;
7507
7508 if (toc_tls)
7509 tls_mask = *toc_tls;
7510 }
7511 }
7512
7513 /* Check that tls relocs are used with tls syms, and non-tls
7514 relocs are used with non-tls syms. */
7515 if (r_symndx != 0
7516 && r_type != R_PPC64_NONE
7517 && (h == NULL
7518 || h->root.type == bfd_link_hash_defined
7519 || h->root.type == bfd_link_hash_defweak)
7520 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7521 {
7522 if (r_type == R_PPC64_TLS && tls_mask != 0)
7523 /* R_PPC64_TLS is OK against a symbol in the TOC. */
7524 ;
7525 else
7526 (*_bfd_error_handler)
7527 (sym_type == STT_TLS
7528 ? _("%s(%s+0x%lx): %s used with TLS symbol %s")
7529 : _("%s(%s+0x%lx): %s used with non-TLS symbol %s"),
7530 bfd_archive_filename (input_bfd),
7531 input_section->name,
7532 (long) rel->r_offset,
7533 ppc64_elf_howto_table[r_type]->name,
7534 sym_name);
7535 }
7536
7537 /* Ensure reloc mapping code below stays sane. */
7538 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7539 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7540 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7541 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7542 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7543 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7544 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7545 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7546 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7547 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7548 abort ();
7549
7550 switch (r_type)
7551 {
7552 default:
7553 break;
7554
7555 case R_PPC64_TOC16:
7556 case R_PPC64_TOC16_LO:
7557 case R_PPC64_TOC16_DS:
7558 case R_PPC64_TOC16_LO_DS:
7559 {
7560 /* Check for toc tls entries. */
7561 char *toc_tls;
7562 int retval;
7563
7564 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7565 rel, input_bfd);
7566 if (retval == 0)
7567 return FALSE;
7568
7569 if (toc_tls)
7570 {
7571 tls_mask = *toc_tls;
7572 if (r_type == R_PPC64_TOC16_DS
7573 || r_type == R_PPC64_TOC16_LO_DS)
7574 {
7575 if (tls_mask != 0
7576 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7577 goto toctprel;
7578 }
7579 else
7580 {
7581 /* If we found a GD reloc pair, then we might be
7582 doing a GD->IE transition. */
7583 if (retval == 2)
7584 {
7585 tls_gd = TLS_TPRELGD;
7586 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7587 goto tls_get_addr_check;
7588 }
7589 else if (retval == 3)
7590 {
7591 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7592 goto tls_get_addr_check;
7593 }
7594 }
7595 }
7596 }
7597 break;
7598
7599 case R_PPC64_GOT_TPREL16_DS:
7600 case R_PPC64_GOT_TPREL16_LO_DS:
7601 if (tls_mask != 0
7602 && (tls_mask & TLS_TPREL) == 0)
7603 {
7604 toctprel:
7605 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7606 insn &= 31 << 21;
7607 insn |= 0x3c0d0000; /* addis 0,13,0 */
7608 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7609 r_type = R_PPC64_TPREL16_HA;
7610 if (toc_symndx != 0)
7611 {
7612 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7613 /* We changed the symbol. Start over in order to
7614 get h, sym, sec etc. right. */
7615 rel--;
7616 continue;
7617 }
7618 else
7619 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7620 }
7621 break;
7622
7623 case R_PPC64_TLS:
7624 if (tls_mask != 0
7625 && (tls_mask & TLS_TPREL) == 0)
7626 {
7627 bfd_vma rtra;
7628 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7629 if ((insn & ((0x3f << 26) | (31 << 11)))
7630 == ((31 << 26) | (13 << 11)))
7631 rtra = insn & ((1 << 26) - (1 << 16));
7632 else if ((insn & ((0x3f << 26) | (31 << 16)))
7633 == ((31 << 26) | (13 << 16)))
7634 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7635 else
7636 abort ();
7637 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7638 /* add -> addi. */
7639 insn = 14 << 26;
7640 else if ((insn & (31 << 1)) == 23 << 1
7641 && ((insn & (31 << 6)) < 14 << 6
7642 || ((insn & (31 << 6)) >= 16 << 6
7643 && (insn & (31 << 6)) < 24 << 6)))
7644 /* load and store indexed -> dform. */
7645 insn = (32 | ((insn >> 6) & 31)) << 26;
7646 else if ((insn & (31 << 1)) == 21 << 1
7647 && (insn & (0x1a << 6)) == 0)
7648 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7649 insn = (((58 | ((insn >> 6) & 4)) << 26)
7650 | ((insn >> 6) & 1));
7651 else if ((insn & (31 << 1)) == 21 << 1
7652 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7653 /* lwax -> lwa. */
7654 insn = (58 << 26) | 2;
7655 else
7656 abort ();
7657 insn |= rtra;
7658 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7659 /* Was PPC64_TLS which sits on insn boundary, now
7660 PPC64_TPREL16_LO which is at insn+2. */
7661 rel->r_offset += 2;
7662 r_type = R_PPC64_TPREL16_LO;
7663 if (toc_symndx != 0)
7664 {
7665 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7666 /* We changed the symbol. Start over in order to
7667 get h, sym, sec etc. right. */
7668 rel--;
7669 continue;
7670 }
7671 else
7672 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7673 }
7674 break;
7675
7676 case R_PPC64_GOT_TLSGD16_HI:
7677 case R_PPC64_GOT_TLSGD16_HA:
7678 tls_gd = TLS_TPRELGD;
7679 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7680 goto tls_gdld_hi;
7681 break;
7682
7683 case R_PPC64_GOT_TLSLD16_HI:
7684 case R_PPC64_GOT_TLSLD16_HA:
7685 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7686 {
7687 tls_gdld_hi:
7688 if ((tls_mask & tls_gd) != 0)
7689 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7690 + R_PPC64_GOT_TPREL16_DS);
7691 else
7692 {
7693 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7694 rel->r_offset -= 2;
7695 r_type = R_PPC64_NONE;
7696 }
7697 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7698 }
7699 break;
7700
7701 case R_PPC64_GOT_TLSGD16:
7702 case R_PPC64_GOT_TLSGD16_LO:
7703 tls_gd = TLS_TPRELGD;
7704 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7705 goto tls_get_addr_check;
7706 break;
7707
7708 case R_PPC64_GOT_TLSLD16:
7709 case R_PPC64_GOT_TLSLD16_LO:
7710 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7711 {
7712 tls_get_addr_check:
7713 if (rel + 1 < relend)
7714 {
7715 enum elf_ppc64_reloc_type r_type2;
7716 unsigned long r_symndx2;
7717 struct elf_link_hash_entry *h2;
7718 bfd_vma insn1, insn2, insn3;
7719 bfd_vma offset;
7720
7721 /* The next instruction should be a call to
7722 __tls_get_addr. Peek at the reloc to be sure. */
7723 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7724 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7725 if (r_symndx2 < symtab_hdr->sh_info
7726 || (r_type2 != R_PPC64_REL14
7727 && r_type2 != R_PPC64_REL14_BRTAKEN
7728 && r_type2 != R_PPC64_REL14_BRNTAKEN
7729 && r_type2 != R_PPC64_REL24))
7730 break;
7731
7732 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7733 while (h2->root.type == bfd_link_hash_indirect
7734 || h2->root.type == bfd_link_hash_warning)
7735 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7736 if (h2 == NULL || h2 != htab->tls_get_addr)
7737 break;
7738
7739 /* OK, it checks out. Replace the call. */
7740 offset = rel[1].r_offset;
7741 insn1 = bfd_get_32 (output_bfd,
7742 contents + rel->r_offset - 2);
7743 insn3 = bfd_get_32 (output_bfd,
7744 contents + offset + 4);
7745 if ((tls_mask & tls_gd) != 0)
7746 {
7747 /* IE */
7748 insn1 &= (1 << 26) - (1 << 2);
7749 insn1 |= 58 << 26; /* ld */
7750 insn2 = 0x7c636a14; /* add 3,3,13 */
7751 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7752 if ((tls_mask & TLS_EXPLICIT) == 0)
7753 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7754 + R_PPC64_GOT_TPREL16_DS);
7755 else
7756 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7757 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7758 }
7759 else
7760 {
7761 /* LE */
7762 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7763 insn2 = 0x38630000; /* addi 3,3,0 */
7764 if (tls_gd == 0)
7765 {
7766 /* Was an LD reloc. */
7767 r_symndx = 0;
7768 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7769 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7770 }
7771 else if (toc_symndx != 0)
7772 r_symndx = toc_symndx;
7773 r_type = R_PPC64_TPREL16_HA;
7774 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7775 rel[1].r_info = ELF64_R_INFO (r_symndx,
7776 R_PPC64_TPREL16_LO);
7777 rel[1].r_offset += 2;
7778 }
7779 if (insn3 == NOP
7780 || insn3 == CROR_151515 || insn3 == CROR_313131)
7781 {
7782 insn3 = insn2;
7783 insn2 = NOP;
7784 rel[1].r_offset += 4;
7785 }
7786 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7787 bfd_put_32 (output_bfd, insn2, contents + offset);
7788 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7789 if (tls_gd == 0 || toc_symndx != 0)
7790 {
7791 /* We changed the symbol. Start over in order
7792 to get h, sym, sec etc. right. */
7793 rel--;
7794 continue;
7795 }
7796 }
7797 }
7798 break;
7799
7800 case R_PPC64_DTPMOD64:
7801 if (rel + 1 < relend
7802 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7803 && rel[1].r_offset == rel->r_offset + 8)
7804 {
7805 if ((tls_mask & TLS_GD) == 0)
7806 {
7807 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7808 if ((tls_mask & TLS_TPRELGD) != 0)
7809 r_type = R_PPC64_TPREL64;
7810 else
7811 {
7812 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7813 r_type = R_PPC64_NONE;
7814 }
7815 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7816 }
7817 }
7818 else
7819 {
7820 if ((tls_mask & TLS_LD) == 0)
7821 {
7822 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7823 r_type = R_PPC64_NONE;
7824 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7825 }
7826 }
7827 break;
7828
7829 case R_PPC64_TPREL64:
7830 if ((tls_mask & TLS_TPREL) == 0)
7831 {
7832 r_type = R_PPC64_NONE;
7833 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7834 }
7835 break;
7836 }
7837
7838 /* Handle other relocations that tweak non-addend part of insn. */
7839 insn = 0;
7840 switch (r_type)
7841 {
7842 default:
7843 break;
7844
7845 /* Branch taken prediction relocations. */
7846 case R_PPC64_ADDR14_BRTAKEN:
7847 case R_PPC64_REL14_BRTAKEN:
7848 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7849 /* Fall thru. */
7850
7851 /* Branch not taken prediction relocations. */
7852 case R_PPC64_ADDR14_BRNTAKEN:
7853 case R_PPC64_REL14_BRNTAKEN:
7854 insn |= bfd_get_32 (output_bfd,
7855 contents + rel->r_offset) & ~(0x01 << 21);
7856 if (is_power4)
7857 {
7858 /* Set 'a' bit. This is 0b00010 in BO field for branch
7859 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7860 for branch on CTR insns (BO == 1a00t or 1a01t). */
7861 if ((insn & (0x14 << 21)) == (0x04 << 21))
7862 insn |= 0x02 << 21;
7863 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7864 insn |= 0x08 << 21;
7865 else
7866 break;
7867 }
7868 else
7869 {
7870 from = (rel->r_offset
7871 + input_section->output_offset
7872 + input_section->output_section->vma);
7873
7874 /* Invert 'y' bit if not the default. */
7875 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7876 insn ^= 0x01 << 21;
7877 }
7878
7879 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7880 break;
7881
7882 case R_PPC64_REL24:
7883 /* Calls to functions with a different TOC, such as calls to
7884 shared objects, need to alter the TOC pointer. This is
7885 done using a linkage stub. A REL24 branching to these
7886 linkage stubs needs to be followed by a nop, as the nop
7887 will be replaced with an instruction to restore the TOC
7888 base pointer. */
7889 if (((h != NULL
7890 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7891 && fdh->plt.plist != NULL)
7892 || ((fdh = h, sec) != NULL
7893 && sec->output_section != NULL
7894 && (htab->stub_group[sec->id].toc_off
7895 != htab->stub_group[input_section->id].toc_off)))
7896 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7897 rel, htab)) != NULL
7898 && (stub_entry->stub_type == ppc_stub_plt_call
7899 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7900 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7901 {
7902 bfd_boolean can_plt_call = 0;
7903
7904 if (rel->r_offset + 8 <= input_section->size)
7905 {
7906 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7907 if (insn == NOP
7908 || insn == CROR_151515 || insn == CROR_313131)
7909 {
7910 bfd_put_32 (input_bfd, LD_R2_40R1,
7911 contents + rel->r_offset + 4);
7912 can_plt_call = 1;
7913 }
7914 }
7915
7916 if (!can_plt_call)
7917 {
7918 if (stub_entry->stub_type == ppc_stub_plt_call)
7919 {
7920 /* If this is a plain branch rather than a branch
7921 and link, don't require a nop. */
7922 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7923 if ((insn & 1) == 0)
7924 can_plt_call = 1;
7925 }
7926 else if (h != NULL
7927 && strcmp (h->root.root.string,
7928 ".__libc_start_main") == 0)
7929 {
7930 /* Allow crt1 branch to go via a toc adjusting stub. */
7931 can_plt_call = 1;
7932 }
7933 else
7934 {
7935 if (strcmp (input_section->output_section->name,
7936 ".init") == 0
7937 || strcmp (input_section->output_section->name,
7938 ".fini") == 0)
7939 (*_bfd_error_handler)
7940 (_("%s(%s+0x%lx): automatic multiple TOCs "
7941 "not supported using your crt files; "
7942 "recompile with -mminimal-toc or upgrade gcc"),
7943 bfd_archive_filename (input_bfd),
7944 input_section->name,
7945 (long) rel->r_offset);
7946 else
7947 (*_bfd_error_handler)
7948 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7949 "does not allow automatic multiple TOCs; "
7950 "recompile with -mminimal-toc or "
7951 "-fno-optimize-sibling-calls, "
7952 "or make `%s' extern"),
7953 bfd_archive_filename (input_bfd),
7954 input_section->name,
7955 (long) rel->r_offset,
7956 sym_name,
7957 sym_name);
7958 bfd_set_error (bfd_error_bad_value);
7959 ret = FALSE;
7960 }
7961 }
7962
7963 if (can_plt_call)
7964 {
7965 relocation = (stub_entry->stub_offset
7966 + stub_entry->stub_sec->output_offset
7967 + stub_entry->stub_sec->output_section->vma);
7968 if (stub_entry->stub_type == ppc_stub_plt_call)
7969 unresolved_reloc = FALSE;
7970 }
7971 }
7972
7973 if (h != NULL
7974 && h->root.type == bfd_link_hash_undefweak
7975 && relocation == 0
7976 && rel->r_addend == 0)
7977 {
7978 /* Tweak calls to undefined weak functions to point at a
7979 blr. We can thus call a weak function without first
7980 checking whether the function is defined. We have a
7981 blr at the end of .sfpr. */
7982 BFD_ASSERT (htab->sfpr->size != 0);
7983 relocation = (htab->sfpr->size - 4
7984 + htab->sfpr->output_offset
7985 + htab->sfpr->output_section->vma);
7986 from = (rel->r_offset
7987 + input_section->output_offset
7988 + input_section->output_section->vma);
7989
7990 /* But let's not be silly about it. If the blr isn't in
7991 reach, just go to the next instruction. */
7992 if (relocation - from + (1 << 25) >= (1 << 26)
7993 || htab->sfpr->size == 0)
7994 relocation = from + 4;
7995 }
7996 break;
7997 }
7998
7999 /* Set `addend'. */
8000 tls_type = 0;
8001 addend = rel->r_addend;
8002 switch (r_type)
8003 {
8004 default:
8005 (*_bfd_error_handler)
8006 (_("%s: unknown relocation type %d for symbol %s"),
8007 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
8008
8009 bfd_set_error (bfd_error_bad_value);
8010 ret = FALSE;
8011 continue;
8012
8013 case R_PPC64_NONE:
8014 case R_PPC64_TLS:
8015 case R_PPC64_GNU_VTINHERIT:
8016 case R_PPC64_GNU_VTENTRY:
8017 continue;
8018
8019 /* GOT16 relocations. Like an ADDR16 using the symbol's
8020 address in the GOT as relocation value instead of the
8021 symbol's value itself. Also, create a GOT entry for the
8022 symbol and put the symbol value there. */
8023 case R_PPC64_GOT_TLSGD16:
8024 case R_PPC64_GOT_TLSGD16_LO:
8025 case R_PPC64_GOT_TLSGD16_HI:
8026 case R_PPC64_GOT_TLSGD16_HA:
8027 tls_type = TLS_TLS | TLS_GD;
8028 goto dogot;
8029
8030 case R_PPC64_GOT_TLSLD16:
8031 case R_PPC64_GOT_TLSLD16_LO:
8032 case R_PPC64_GOT_TLSLD16_HI:
8033 case R_PPC64_GOT_TLSLD16_HA:
8034 tls_type = TLS_TLS | TLS_LD;
8035 goto dogot;
8036
8037 case R_PPC64_GOT_TPREL16_DS:
8038 case R_PPC64_GOT_TPREL16_LO_DS:
8039 case R_PPC64_GOT_TPREL16_HI:
8040 case R_PPC64_GOT_TPREL16_HA:
8041 tls_type = TLS_TLS | TLS_TPREL;
8042 goto dogot;
8043
8044 case R_PPC64_GOT_DTPREL16_DS:
8045 case R_PPC64_GOT_DTPREL16_LO_DS:
8046 case R_PPC64_GOT_DTPREL16_HI:
8047 case R_PPC64_GOT_DTPREL16_HA:
8048 tls_type = TLS_TLS | TLS_DTPREL;
8049 goto dogot;
8050
8051 case R_PPC64_GOT16:
8052 case R_PPC64_GOT16_LO:
8053 case R_PPC64_GOT16_HI:
8054 case R_PPC64_GOT16_HA:
8055 case R_PPC64_GOT16_DS:
8056 case R_PPC64_GOT16_LO_DS:
8057 dogot:
8058 {
8059 /* Relocation is to the entry for this symbol in the global
8060 offset table. */
8061 asection *got;
8062 bfd_vma *offp;
8063 bfd_vma off;
8064 unsigned long indx = 0;
8065
8066 if (tls_type == (TLS_TLS | TLS_LD)
8067 && (h == NULL
8068 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
8069 offp = &ppc64_tlsld_got (input_bfd)->offset;
8070 else
8071 {
8072 struct got_entry *ent;
8073
8074 if (h != NULL)
8075 {
8076 bfd_boolean dyn = htab->elf.dynamic_sections_created;
8077 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8078 || (info->shared
8079 && SYMBOL_REFERENCES_LOCAL (info, h)))
8080 /* This is actually a static link, or it is a
8081 -Bsymbolic link and the symbol is defined
8082 locally, or the symbol was forced to be local
8083 because of a version file. */
8084 ;
8085 else
8086 {
8087 indx = h->dynindx;
8088 unresolved_reloc = FALSE;
8089 }
8090 ent = h->got.glist;
8091 }
8092 else
8093 {
8094 if (local_got_ents == NULL)
8095 abort ();
8096 ent = local_got_ents[r_symndx];
8097 }
8098
8099 for (; ent != NULL; ent = ent->next)
8100 if (ent->addend == rel->r_addend
8101 && ent->owner == input_bfd
8102 && ent->tls_type == tls_type)
8103 break;
8104 if (ent == NULL)
8105 abort ();
8106 offp = &ent->got.offset;
8107 }
8108
8109 got = ppc64_elf_tdata (input_bfd)->got;
8110 if (got == NULL)
8111 abort ();
8112
8113 /* The offset must always be a multiple of 8. We use the
8114 least significant bit to record whether we have already
8115 processed this entry. */
8116 off = *offp;
8117 if ((off & 1) != 0)
8118 off &= ~1;
8119 else
8120 {
8121 /* Generate relocs for the dynamic linker, except in
8122 the case of TLSLD where we'll use one entry per
8123 module. */
8124 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
8125
8126 *offp = off | 1;
8127 if ((info->shared || indx != 0)
8128 && (h == NULL
8129 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8130 || h->root.type != bfd_link_hash_undefweak))
8131 {
8132 outrel.r_offset = (got->output_section->vma
8133 + got->output_offset
8134 + off);
8135 outrel.r_addend = rel->r_addend;
8136 if (tls_type & (TLS_LD | TLS_GD))
8137 {
8138 outrel.r_addend = 0;
8139 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
8140 if (tls_type == (TLS_TLS | TLS_GD))
8141 {
8142 loc = relgot->contents;
8143 loc += (relgot->reloc_count++
8144 * sizeof (Elf64_External_Rela));
8145 bfd_elf64_swap_reloca_out (output_bfd,
8146 &outrel, loc);
8147 outrel.r_offset += 8;
8148 outrel.r_addend = rel->r_addend;
8149 outrel.r_info
8150 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8151 }
8152 }
8153 else if (tls_type == (TLS_TLS | TLS_DTPREL))
8154 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8155 else if (tls_type == (TLS_TLS | TLS_TPREL))
8156 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
8157 else if (indx == 0)
8158 {
8159 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
8160
8161 /* Write the .got section contents for the sake
8162 of prelink. */
8163 loc = got->contents + off;
8164 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
8165 loc);
8166 }
8167 else
8168 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8169
8170 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8171 {
8172 outrel.r_addend += relocation;
8173 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8174 outrel.r_addend -= htab->elf.tls_sec->vma;
8175 }
8176 loc = relgot->contents;
8177 loc += (relgot->reloc_count++
8178 * sizeof (Elf64_External_Rela));
8179 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8180 }
8181
8182 /* Init the .got section contents here if we're not
8183 emitting a reloc. */
8184 else
8185 {
8186 relocation += rel->r_addend;
8187 if (tls_type == (TLS_TLS | TLS_LD))
8188 relocation = 1;
8189 else if (tls_type != 0)
8190 {
8191 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
8192 if (tls_type == (TLS_TLS | TLS_TPREL))
8193 relocation += DTP_OFFSET - TP_OFFSET;
8194
8195 if (tls_type == (TLS_TLS | TLS_GD))
8196 {
8197 bfd_put_64 (output_bfd, relocation,
8198 got->contents + off + 8);
8199 relocation = 1;
8200 }
8201 }
8202
8203 bfd_put_64 (output_bfd, relocation,
8204 got->contents + off);
8205 }
8206 }
8207
8208 if (off >= (bfd_vma) -2)
8209 abort ();
8210
8211 relocation = got->output_offset + off;
8212
8213 /* TOC base (r2) is TOC start plus 0x8000. */
8214 addend = -TOC_BASE_OFF;
8215 }
8216 break;
8217
8218 case R_PPC64_PLT16_HA:
8219 case R_PPC64_PLT16_HI:
8220 case R_PPC64_PLT16_LO:
8221 case R_PPC64_PLT32:
8222 case R_PPC64_PLT64:
8223 /* Relocation is to the entry for this symbol in the
8224 procedure linkage table. */
8225
8226 /* Resolve a PLT reloc against a local symbol directly,
8227 without using the procedure linkage table. */
8228 if (h == NULL)
8229 break;
8230
8231 /* It's possible that we didn't make a PLT entry for this
8232 symbol. This happens when statically linking PIC code,
8233 or when using -Bsymbolic. Go find a match if there is a
8234 PLT entry. */
8235 if (htab->plt != NULL)
8236 {
8237 struct plt_entry *ent;
8238 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8239 if (ent->addend == rel->r_addend
8240 && ent->plt.offset != (bfd_vma) -1)
8241 {
8242 relocation = (htab->plt->output_section->vma
8243 + htab->plt->output_offset
8244 + ent->plt.offset);
8245 unresolved_reloc = FALSE;
8246 }
8247 }
8248 break;
8249
8250 case R_PPC64_TOC:
8251 /* Relocation value is TOC base. */
8252 relocation = TOCstart;
8253 if (r_symndx == 0)
8254 relocation += htab->stub_group[input_section->id].toc_off;
8255 else if (unresolved_reloc)
8256 ;
8257 else if (sec != NULL && sec->id <= htab->top_id)
8258 relocation += htab->stub_group[sec->id].toc_off;
8259 else
8260 unresolved_reloc = TRUE;
8261 goto dodyn2;
8262
8263 /* TOC16 relocs. We want the offset relative to the TOC base,
8264 which is the address of the start of the TOC plus 0x8000.
8265 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8266 in this order. */
8267 case R_PPC64_TOC16:
8268 case R_PPC64_TOC16_LO:
8269 case R_PPC64_TOC16_HI:
8270 case R_PPC64_TOC16_DS:
8271 case R_PPC64_TOC16_LO_DS:
8272 case R_PPC64_TOC16_HA:
8273 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8274 break;
8275
8276 /* Relocate against the beginning of the section. */
8277 case R_PPC64_SECTOFF:
8278 case R_PPC64_SECTOFF_LO:
8279 case R_PPC64_SECTOFF_HI:
8280 case R_PPC64_SECTOFF_DS:
8281 case R_PPC64_SECTOFF_LO_DS:
8282 case R_PPC64_SECTOFF_HA:
8283 if (sec != NULL)
8284 addend -= sec->output_section->vma;
8285 break;
8286
8287 case R_PPC64_REL14:
8288 case R_PPC64_REL14_BRNTAKEN:
8289 case R_PPC64_REL14_BRTAKEN:
8290 case R_PPC64_REL24:
8291 break;
8292
8293 case R_PPC64_TPREL16:
8294 case R_PPC64_TPREL16_LO:
8295 case R_PPC64_TPREL16_HI:
8296 case R_PPC64_TPREL16_HA:
8297 case R_PPC64_TPREL16_DS:
8298 case R_PPC64_TPREL16_LO_DS:
8299 case R_PPC64_TPREL16_HIGHER:
8300 case R_PPC64_TPREL16_HIGHERA:
8301 case R_PPC64_TPREL16_HIGHEST:
8302 case R_PPC64_TPREL16_HIGHESTA:
8303 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8304 if (info->shared)
8305 /* The TPREL16 relocs shouldn't really be used in shared
8306 libs as they will result in DT_TEXTREL being set, but
8307 support them anyway. */
8308 goto dodyn;
8309 break;
8310
8311 case R_PPC64_DTPREL16:
8312 case R_PPC64_DTPREL16_LO:
8313 case R_PPC64_DTPREL16_HI:
8314 case R_PPC64_DTPREL16_HA:
8315 case R_PPC64_DTPREL16_DS:
8316 case R_PPC64_DTPREL16_LO_DS:
8317 case R_PPC64_DTPREL16_HIGHER:
8318 case R_PPC64_DTPREL16_HIGHERA:
8319 case R_PPC64_DTPREL16_HIGHEST:
8320 case R_PPC64_DTPREL16_HIGHESTA:
8321 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8322 break;
8323
8324 case R_PPC64_DTPMOD64:
8325 relocation = 1;
8326 addend = 0;
8327 goto dodyn;
8328
8329 case R_PPC64_TPREL64:
8330 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8331 goto dodyn;
8332
8333 case R_PPC64_DTPREL64:
8334 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8335 /* Fall thru */
8336
8337 /* Relocations that may need to be propagated if this is a
8338 dynamic object. */
8339 case R_PPC64_REL30:
8340 case R_PPC64_REL32:
8341 case R_PPC64_REL64:
8342 case R_PPC64_ADDR14:
8343 case R_PPC64_ADDR14_BRNTAKEN:
8344 case R_PPC64_ADDR14_BRTAKEN:
8345 case R_PPC64_ADDR16:
8346 case R_PPC64_ADDR16_DS:
8347 case R_PPC64_ADDR16_HA:
8348 case R_PPC64_ADDR16_HI:
8349 case R_PPC64_ADDR16_HIGHER:
8350 case R_PPC64_ADDR16_HIGHERA:
8351 case R_PPC64_ADDR16_HIGHEST:
8352 case R_PPC64_ADDR16_HIGHESTA:
8353 case R_PPC64_ADDR16_LO:
8354 case R_PPC64_ADDR16_LO_DS:
8355 case R_PPC64_ADDR24:
8356 case R_PPC64_ADDR32:
8357 case R_PPC64_ADDR64:
8358 case R_PPC64_UADDR16:
8359 case R_PPC64_UADDR32:
8360 case R_PPC64_UADDR64:
8361 /* r_symndx will be zero only for relocs against symbols
8362 from removed linkonce sections, or sections discarded by
8363 a linker script. */
8364 dodyn:
8365 if (r_symndx == 0)
8366 break;
8367 /* Fall thru. */
8368
8369 dodyn2:
8370 if ((input_section->flags & SEC_ALLOC) == 0)
8371 break;
8372
8373 if (NO_OPD_RELOCS && is_opd)
8374 break;
8375
8376 if ((info->shared
8377 && (h == NULL
8378 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8379 || h->root.type != bfd_link_hash_undefweak)
8380 && (MUST_BE_DYN_RELOC (r_type)
8381 || !SYMBOL_CALLS_LOCAL (info, h)))
8382 || (ELIMINATE_COPY_RELOCS
8383 && !info->shared
8384 && h != NULL
8385 && h->dynindx != -1
8386 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8387 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8388 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8389 {
8390 Elf_Internal_Rela outrel;
8391 bfd_boolean skip, relocate;
8392 asection *sreloc;
8393 bfd_byte *loc;
8394 bfd_vma out_off;
8395
8396 /* When generating a dynamic object, these relocations
8397 are copied into the output file to be resolved at run
8398 time. */
8399
8400 skip = FALSE;
8401 relocate = FALSE;
8402
8403 out_off = _bfd_elf_section_offset (output_bfd, info,
8404 input_section, rel->r_offset);
8405 if (out_off == (bfd_vma) -1)
8406 skip = TRUE;
8407 else if (out_off == (bfd_vma) -2)
8408 skip = TRUE, relocate = TRUE;
8409 out_off += (input_section->output_section->vma
8410 + input_section->output_offset);
8411 outrel.r_offset = out_off;
8412 outrel.r_addend = rel->r_addend;
8413
8414 /* Optimize unaligned reloc use. */
8415 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8416 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8417 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8418 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8419 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8420 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8421 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8422 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8423 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8424
8425 if (skip)
8426 memset (&outrel, 0, sizeof outrel);
8427 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8428 && !is_opd
8429 && r_type != R_PPC64_TOC)
8430 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8431 else
8432 {
8433 /* This symbol is local, or marked to become local,
8434 or this is an opd section reloc which must point
8435 at a local function. */
8436 outrel.r_addend += relocation;
8437 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8438 {
8439 if (is_opd && h != NULL)
8440 {
8441 /* Lie about opd entries. This case occurs
8442 when building shared libraries and we
8443 reference a function in another shared
8444 lib. The same thing happens for a weak
8445 definition in an application that's
8446 overridden by a strong definition in a
8447 shared lib. (I believe this is a generic
8448 bug in binutils handling of weak syms.)
8449 In these cases we won't use the opd
8450 entry in this lib. */
8451 unresolved_reloc = FALSE;
8452 }
8453 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8454
8455 /* We need to relocate .opd contents for ld.so.
8456 Prelink also wants simple and consistent rules
8457 for relocs. This make all RELATIVE relocs have
8458 *r_offset equal to r_addend. */
8459 relocate = TRUE;
8460 }
8461 else
8462 {
8463 long indx = 0;
8464
8465 if (bfd_is_abs_section (sec))
8466 ;
8467 else if (sec == NULL || sec->owner == NULL)
8468 {
8469 bfd_set_error (bfd_error_bad_value);
8470 return FALSE;
8471 }
8472 else
8473 {
8474 asection *osec;
8475
8476 osec = sec->output_section;
8477 indx = elf_section_data (osec)->dynindx;
8478
8479 /* We are turning this relocation into one
8480 against a section symbol, so subtract out
8481 the output section's address but not the
8482 offset of the input section in the output
8483 section. */
8484 outrel.r_addend -= osec->vma;
8485 }
8486
8487 outrel.r_info = ELF64_R_INFO (indx, r_type);
8488 }
8489 }
8490
8491 sreloc = elf_section_data (input_section)->sreloc;
8492 if (sreloc == NULL)
8493 abort ();
8494
8495 loc = sreloc->contents;
8496 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8497 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8498
8499 /* If this reloc is against an external symbol, it will
8500 be computed at runtime, so there's no need to do
8501 anything now. However, for the sake of prelink ensure
8502 that the section contents are a known value. */
8503 if (! relocate)
8504 {
8505 unresolved_reloc = FALSE;
8506 /* The value chosen here is quite arbitrary as ld.so
8507 ignores section contents except for the special
8508 case of .opd where the contents might be accessed
8509 before relocation. Choose zero, as that won't
8510 cause reloc overflow. */
8511 relocation = 0;
8512 addend = 0;
8513 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8514 to improve backward compatibility with older
8515 versions of ld. */
8516 if (r_type == R_PPC64_ADDR64)
8517 addend = outrel.r_addend;
8518 /* Adjust pc_relative relocs to have zero in *r_offset. */
8519 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8520 addend = (input_section->output_section->vma
8521 + input_section->output_offset
8522 + rel->r_offset);
8523 }
8524 }
8525 break;
8526
8527 case R_PPC64_COPY:
8528 case R_PPC64_GLOB_DAT:
8529 case R_PPC64_JMP_SLOT:
8530 case R_PPC64_RELATIVE:
8531 /* We shouldn't ever see these dynamic relocs in relocatable
8532 files. */
8533 /* Fall through. */
8534
8535 case R_PPC64_PLTGOT16:
8536 case R_PPC64_PLTGOT16_DS:
8537 case R_PPC64_PLTGOT16_HA:
8538 case R_PPC64_PLTGOT16_HI:
8539 case R_PPC64_PLTGOT16_LO:
8540 case R_PPC64_PLTGOT16_LO_DS:
8541 case R_PPC64_PLTREL32:
8542 case R_PPC64_PLTREL64:
8543 /* These ones haven't been implemented yet. */
8544
8545 (*_bfd_error_handler)
8546 (_("%s: relocation %s is not supported for symbol %s."),
8547 bfd_archive_filename (input_bfd),
8548 ppc64_elf_howto_table[r_type]->name, sym_name);
8549
8550 bfd_set_error (bfd_error_invalid_operation);
8551 ret = FALSE;
8552 continue;
8553 }
8554
8555 /* Do any further special processing. */
8556 switch (r_type)
8557 {
8558 default:
8559 break;
8560
8561 case R_PPC64_ADDR16_HA:
8562 case R_PPC64_ADDR16_HIGHERA:
8563 case R_PPC64_ADDR16_HIGHESTA:
8564 case R_PPC64_GOT16_HA:
8565 case R_PPC64_PLTGOT16_HA:
8566 case R_PPC64_PLT16_HA:
8567 case R_PPC64_TOC16_HA:
8568 case R_PPC64_SECTOFF_HA:
8569 case R_PPC64_TPREL16_HA:
8570 case R_PPC64_DTPREL16_HA:
8571 case R_PPC64_GOT_TLSGD16_HA:
8572 case R_PPC64_GOT_TLSLD16_HA:
8573 case R_PPC64_GOT_TPREL16_HA:
8574 case R_PPC64_GOT_DTPREL16_HA:
8575 case R_PPC64_TPREL16_HIGHER:
8576 case R_PPC64_TPREL16_HIGHERA:
8577 case R_PPC64_TPREL16_HIGHEST:
8578 case R_PPC64_TPREL16_HIGHESTA:
8579 case R_PPC64_DTPREL16_HIGHER:
8580 case R_PPC64_DTPREL16_HIGHERA:
8581 case R_PPC64_DTPREL16_HIGHEST:
8582 case R_PPC64_DTPREL16_HIGHESTA:
8583 /* It's just possible that this symbol is a weak symbol
8584 that's not actually defined anywhere. In that case,
8585 'sec' would be NULL, and we should leave the symbol
8586 alone (it will be set to zero elsewhere in the link). */
8587 if (sec != NULL)
8588 /* Add 0x10000 if sign bit in 0:15 is set.
8589 Bits 0:15 are not used. */
8590 addend += 0x8000;
8591 break;
8592
8593 case R_PPC64_ADDR16_DS:
8594 case R_PPC64_ADDR16_LO_DS:
8595 case R_PPC64_GOT16_DS:
8596 case R_PPC64_GOT16_LO_DS:
8597 case R_PPC64_PLT16_LO_DS:
8598 case R_PPC64_SECTOFF_DS:
8599 case R_PPC64_SECTOFF_LO_DS:
8600 case R_PPC64_TOC16_DS:
8601 case R_PPC64_TOC16_LO_DS:
8602 case R_PPC64_PLTGOT16_DS:
8603 case R_PPC64_PLTGOT16_LO_DS:
8604 case R_PPC64_GOT_TPREL16_DS:
8605 case R_PPC64_GOT_TPREL16_LO_DS:
8606 case R_PPC64_GOT_DTPREL16_DS:
8607 case R_PPC64_GOT_DTPREL16_LO_DS:
8608 case R_PPC64_TPREL16_DS:
8609 case R_PPC64_TPREL16_LO_DS:
8610 case R_PPC64_DTPREL16_DS:
8611 case R_PPC64_DTPREL16_LO_DS:
8612 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8613 mask = 3;
8614 /* If this reloc is against an lq insn, then the value must be
8615 a multiple of 16. This is somewhat of a hack, but the
8616 "correct" way to do this by defining _DQ forms of all the
8617 _DS relocs bloats all reloc switches in this file. It
8618 doesn't seem to make much sense to use any of these relocs
8619 in data, so testing the insn should be safe. */
8620 if ((insn & (0x3f << 26)) == (56u << 26))
8621 mask = 15;
8622 if (((relocation + addend) & mask) != 0)
8623 {
8624 (*_bfd_error_handler)
8625 (_("%s: error: relocation %s not a multiple of %d"),
8626 bfd_archive_filename (input_bfd),
8627 ppc64_elf_howto_table[r_type]->name,
8628 mask + 1);
8629 bfd_set_error (bfd_error_bad_value);
8630 ret = FALSE;
8631 continue;
8632 }
8633 break;
8634
8635 case R_PPC64_REL14:
8636 case R_PPC64_REL14_BRNTAKEN:
8637 case R_PPC64_REL14_BRTAKEN:
8638 max_br_offset = 1 << 15;
8639 goto branch_check;
8640
8641 case R_PPC64_REL24:
8642 max_br_offset = 1 << 25;
8643
8644 branch_check:
8645 /* If the branch is out of reach or the TOC register needs
8646 adjusting, then redirect the call to the local stub for
8647 this function. */
8648 from = (rel->r_offset
8649 + input_section->output_offset
8650 + input_section->output_section->vma);
8651 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8652 || (sec != NULL
8653 && sec->output_section != NULL
8654 && sec->id <= htab->top_id
8655 && (htab->stub_group[sec->id].toc_off
8656 != htab->stub_group[input_section->id].toc_off)))
8657 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8658 rel, htab)) != NULL)
8659 {
8660 /* Munge up the value and addend so that we call the stub
8661 rather than the procedure directly. */
8662 relocation = (stub_entry->stub_offset
8663 + stub_entry->stub_sec->output_offset
8664 + stub_entry->stub_sec->output_section->vma);
8665 addend = 0;
8666 }
8667 break;
8668 }
8669
8670 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8671 because such sections are not SEC_ALLOC and thus ld.so will
8672 not process them. */
8673 if (unresolved_reloc
8674 && !((input_section->flags & SEC_DEBUGGING) != 0
8675 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8676 {
8677 (*_bfd_error_handler)
8678 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8679 bfd_archive_filename (input_bfd),
8680 bfd_get_section_name (input_bfd, input_section),
8681 (long) rel->r_offset,
8682 ppc64_elf_howto_table[(int) r_type]->name,
8683 h->root.root.string);
8684 ret = FALSE;
8685 }
8686
8687 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8688 input_bfd,
8689 input_section,
8690 contents,
8691 rel->r_offset,
8692 relocation,
8693 addend);
8694
8695 if (r != bfd_reloc_ok)
8696 {
8697 if (sym_name == NULL)
8698 sym_name = "(null)";
8699 if (r == bfd_reloc_overflow)
8700 {
8701 if (warned)
8702 continue;
8703 if (h != NULL
8704 && h->root.type == bfd_link_hash_undefweak
8705 && ppc64_elf_howto_table[r_type]->pc_relative)
8706 {
8707 /* Assume this is a call protected by other code that
8708 detects the symbol is undefined. If this is the case,
8709 we can safely ignore the overflow. If not, the
8710 program is hosed anyway, and a little warning isn't
8711 going to help. */
8712
8713 continue;
8714 }
8715
8716 if (!((*info->callbacks->reloc_overflow)
8717 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8718 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8719 return FALSE;
8720 }
8721 else
8722 {
8723 (*_bfd_error_handler)
8724 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8725 bfd_archive_filename (input_bfd),
8726 bfd_get_section_name (input_bfd, input_section),
8727 (long) rel->r_offset,
8728 ppc64_elf_howto_table[r_type]->name,
8729 sym_name,
8730 (int) r);
8731 ret = FALSE;
8732 }
8733 }
8734 }
8735
8736 return ret;
8737 }
8738
8739 /* Adjust the value of any local symbols in opd sections. */
8740
8741 static bfd_boolean
8742 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
8743 const char *name ATTRIBUTE_UNUSED,
8744 Elf_Internal_Sym *elfsym,
8745 asection *input_sec,
8746 struct elf_link_hash_entry *h)
8747 {
8748 long *adjust;
8749 bfd_vma value;
8750
8751 if (h != NULL
8752 || input_sec == NULL
8753 || ppc64_elf_section_data (input_sec) == NULL
8754 || (adjust = ppc64_elf_section_data (input_sec)->opd.adjust) == NULL)
8755 return TRUE;
8756
8757 value = elfsym->st_value - input_sec->output_offset;
8758 if (!info->relocatable)
8759 value -= input_sec->output_section->vma;
8760
8761 elfsym->st_value += adjust[value / 24];
8762 return TRUE;
8763 }
8764
8765 /* Finish up dynamic symbol handling. We set the contents of various
8766 dynamic sections here. */
8767
8768 static bfd_boolean
8769 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8770 struct bfd_link_info *info,
8771 struct elf_link_hash_entry *h,
8772 Elf_Internal_Sym *sym)
8773 {
8774 struct ppc_link_hash_table *htab;
8775 bfd *dynobj;
8776
8777 htab = ppc_hash_table (info);
8778 dynobj = htab->elf.dynobj;
8779
8780 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8781 {
8782 struct plt_entry *ent;
8783 Elf_Internal_Rela rela;
8784 bfd_byte *loc;
8785
8786 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8787 if (ent->plt.offset != (bfd_vma) -1)
8788 {
8789 /* This symbol has an entry in the procedure linkage
8790 table. Set it up. */
8791
8792 if (htab->plt == NULL
8793 || htab->relplt == NULL
8794 || htab->glink == NULL)
8795 abort ();
8796
8797 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8798 fill in the PLT entry. */
8799 rela.r_offset = (htab->plt->output_section->vma
8800 + htab->plt->output_offset
8801 + ent->plt.offset);
8802 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8803 rela.r_addend = ent->addend;
8804
8805 loc = htab->relplt->contents;
8806 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8807 * sizeof (Elf64_External_Rela));
8808 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8809 }
8810 }
8811
8812 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8813 {
8814 Elf_Internal_Rela rela;
8815 bfd_byte *loc;
8816
8817 /* This symbol needs a copy reloc. Set it up. */
8818
8819 if (h->dynindx == -1
8820 || (h->root.type != bfd_link_hash_defined
8821 && h->root.type != bfd_link_hash_defweak)
8822 || htab->relbss == NULL)
8823 abort ();
8824
8825 rela.r_offset = (h->root.u.def.value
8826 + h->root.u.def.section->output_section->vma
8827 + h->root.u.def.section->output_offset);
8828 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8829 rela.r_addend = 0;
8830 loc = htab->relbss->contents;
8831 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8832 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8833 }
8834
8835 /* Mark some specially defined symbols as absolute. */
8836 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8837 sym->st_shndx = SHN_ABS;
8838
8839 return TRUE;
8840 }
8841
8842 /* Used to decide how to sort relocs in an optimal manner for the
8843 dynamic linker, before writing them out. */
8844
8845 static enum elf_reloc_type_class
8846 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8847 {
8848 enum elf_ppc64_reloc_type r_type;
8849
8850 r_type = ELF64_R_TYPE (rela->r_info);
8851 switch (r_type)
8852 {
8853 case R_PPC64_RELATIVE:
8854 return reloc_class_relative;
8855 case R_PPC64_JMP_SLOT:
8856 return reloc_class_plt;
8857 case R_PPC64_COPY:
8858 return reloc_class_copy;
8859 default:
8860 return reloc_class_normal;
8861 }
8862 }
8863
8864 /* Finish up the dynamic sections. */
8865
8866 static bfd_boolean
8867 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8868 struct bfd_link_info *info)
8869 {
8870 struct ppc_link_hash_table *htab;
8871 bfd *dynobj;
8872 asection *sdyn;
8873
8874 htab = ppc_hash_table (info);
8875 dynobj = htab->elf.dynobj;
8876 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8877
8878 if (htab->elf.dynamic_sections_created)
8879 {
8880 Elf64_External_Dyn *dyncon, *dynconend;
8881
8882 if (sdyn == NULL || htab->got == NULL)
8883 abort ();
8884
8885 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8886 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
8887 for (; dyncon < dynconend; dyncon++)
8888 {
8889 Elf_Internal_Dyn dyn;
8890 asection *s;
8891
8892 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8893
8894 switch (dyn.d_tag)
8895 {
8896 default:
8897 continue;
8898
8899 case DT_PPC64_GLINK:
8900 s = htab->glink;
8901 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8902 /* We stupidly defined DT_PPC64_GLINK to be the start
8903 of glink rather than the first entry point, which is
8904 what ld.so needs, and now have a bigger stub to
8905 support automatic multiple TOCs. */
8906 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8907 break;
8908
8909 case DT_PPC64_OPD:
8910 s = bfd_get_section_by_name (output_bfd, ".opd");
8911 if (s == NULL)
8912 continue;
8913 dyn.d_un.d_ptr = s->vma;
8914 break;
8915
8916 case DT_PPC64_OPDSZ:
8917 s = bfd_get_section_by_name (output_bfd, ".opd");
8918 if (s == NULL)
8919 continue;
8920 dyn.d_un.d_val = s->size;
8921 break;
8922
8923 case DT_PLTGOT:
8924 s = htab->plt;
8925 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8926 break;
8927
8928 case DT_JMPREL:
8929 s = htab->relplt;
8930 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8931 break;
8932
8933 case DT_PLTRELSZ:
8934 dyn.d_un.d_val = htab->relplt->size;
8935 break;
8936
8937 case DT_RELASZ:
8938 /* Don't count procedure linkage table relocs in the
8939 overall reloc count. */
8940 s = htab->relplt;
8941 if (s == NULL)
8942 continue;
8943 dyn.d_un.d_val -= s->size;
8944 break;
8945
8946 case DT_RELA:
8947 /* We may not be using the standard ELF linker script.
8948 If .rela.plt is the first .rela section, we adjust
8949 DT_RELA to not include it. */
8950 s = htab->relplt;
8951 if (s == NULL)
8952 continue;
8953 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8954 continue;
8955 dyn.d_un.d_ptr += s->size;
8956 break;
8957 }
8958
8959 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8960 }
8961 }
8962
8963 if (htab->got != NULL && htab->got->size != 0)
8964 {
8965 /* Fill in the first entry in the global offset table.
8966 We use it to hold the link-time TOCbase. */
8967 bfd_put_64 (output_bfd,
8968 elf_gp (output_bfd) + TOC_BASE_OFF,
8969 htab->got->contents);
8970
8971 /* Set .got entry size. */
8972 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
8973 }
8974
8975 if (htab->plt != NULL && htab->plt->size != 0)
8976 {
8977 /* Set .plt entry size. */
8978 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
8979 = PLT_ENTRY_SIZE;
8980 }
8981
8982 /* We need to handle writing out multiple GOT sections ourselves,
8983 since we didn't add them to DYNOBJ. */
8984 while ((dynobj = dynobj->link_next) != NULL)
8985 {
8986 asection *s;
8987 s = ppc64_elf_tdata (dynobj)->got;
8988 if (s != NULL
8989 && s->size != 0
8990 && s->output_section != bfd_abs_section_ptr
8991 && !bfd_set_section_contents (output_bfd, s->output_section,
8992 s->contents, s->output_offset,
8993 s->size))
8994 return FALSE;
8995 s = ppc64_elf_tdata (dynobj)->relgot;
8996 if (s != NULL
8997 && s->size != 0
8998 && s->output_section != bfd_abs_section_ptr
8999 && !bfd_set_section_contents (output_bfd, s->output_section,
9000 s->contents, s->output_offset,
9001 s->size))
9002 return FALSE;
9003 }
9004
9005 return TRUE;
9006 }
9007
9008 #include "elf64-target.h"
git-cvsimport of binutils cvsroot