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1/* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011, 2012 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.
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 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25/* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29#include "sysdep.h"
30#include <stdarg.h>
31#include "bfd.h"
32#include "bfdlink.h"
33#include "libbfd.h"
34#include "elf-bfd.h"
35#include "elf/ppc64.h"
36#include "elf64-ppc.h"
37#include "dwarf2.h"
38
39static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
59
60#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61#define TARGET_LITTLE_NAME "elf64-powerpcle"
62#define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63#define TARGET_BIG_NAME "elf64-powerpc"
64#define ELF_ARCH bfd_arch_powerpc
65#define ELF_TARGET_ID PPC64_ELF_DATA
66#define ELF_MACHINE_CODE EM_PPC64
67#define ELF_MAXPAGESIZE 0x10000
68#define ELF_COMMONPAGESIZE 0x1000
69#define elf_info_to_howto ppc64_elf_info_to_howto
70
71#define elf_backend_want_got_sym 0
72#define elf_backend_want_plt_sym 0
73#define elf_backend_plt_alignment 3
74#define elf_backend_plt_not_loaded 1
75#define elf_backend_got_header_size 8
76#define elf_backend_can_gc_sections 1
77#define elf_backend_can_refcount 1
78#define elf_backend_rela_normal 1
79#define elf_backend_default_execstack 0
80
81#define bfd_elf64_mkobject ppc64_elf_mkobject
82#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83#define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84#define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
85#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87#define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88#define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
89#define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
90
91#define elf_backend_object_p ppc64_elf_object_p
92#define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
93#define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
94#define elf_backend_write_core_note ppc64_elf_write_core_note
95#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
96#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
97#define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
98#define elf_backend_check_directives ppc64_elf_process_dot_syms
99#define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
100#define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
101#define elf_backend_check_relocs ppc64_elf_check_relocs
102#define elf_backend_gc_keep ppc64_elf_gc_keep
103#define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
104#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
105#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
106#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
107#define elf_backend_hide_symbol ppc64_elf_hide_symbol
108#define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
109#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
110#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
111#define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112#define elf_backend_action_discarded ppc64_elf_action_discarded
113#define elf_backend_relocate_section ppc64_elf_relocate_section
114#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117#define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118#define elf_backend_special_sections ppc64_elf_special_sections
119#define elf_backend_post_process_headers _bfd_elf_set_osabi
120
121/* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125/* The size in bytes of an entry in the procedure linkage table. */
126#define PLT_ENTRY_SIZE 24
127
128/* The initial size of the plt reserved for the dynamic linker. */
129#define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
130
131/* TOC base pointers offset from start of TOC. */
132#define TOC_BASE_OFF 0x8000
133
134/* Offset of tp and dtp pointers from start of TLS block. */
135#define TP_OFFSET 0x7000
136#define DTP_OFFSET 0x8000
137
138/* .plt call stub instructions. The normal stub is like this, but
139 sometimes the .plt entry crosses a 64k boundary and we need to
140 insert an addi to adjust r12. */
141#define PLT_CALL_STUB_SIZE (7*4)
142#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
143#define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
144#define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
145#define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
146#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
147 /* ld %r11,xxx+16@l(%r12) */
148#define BCTR 0x4e800420 /* bctr */
149
150
151#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
152#define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
153#define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
154#define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
155
156#define XOR_R11_R11_R11 0x7d6b5a78 /* xor %r11,%r11,%r11 */
157#define ADD_R12_R12_R11 0x7d8c5a14 /* add %r12,%r12,%r11 */
158#define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
159#define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
160#define BNECTR 0x4ca20420 /* bnectr+ */
161#define BNECTR_P4 0x4ce20420 /* bnectr+ */
162
163#define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
164#define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
165
166#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
167
168/* glink call stub instructions. We enter with the index in R0. */
169#define GLINK_CALL_STUB_SIZE (16*4)
170 /* 0: */
171 /* .quad plt0-1f */
172 /* __glink: */
173#define MFLR_R12 0x7d8802a6 /* mflr %12 */
174#define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
175 /* 1: */
176#define MFLR_R11 0x7d6802a6 /* mflr %11 */
177#define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
178#define MTLR_R12 0x7d8803a6 /* mtlr %12 */
179#define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
180 /* ld %11,0(%12) */
181 /* ld %2,8(%12) */
182 /* mtctr %11 */
183 /* ld %11,16(%12) */
184 /* bctr */
185
186/* Pad with this. */
187#define NOP 0x60000000
188
189/* Some other nops. */
190#define CROR_151515 0x4def7b82
191#define CROR_313131 0x4ffffb82
192
193/* .glink entries for the first 32k functions are two instructions. */
194#define LI_R0_0 0x38000000 /* li %r0,0 */
195#define B_DOT 0x48000000 /* b . */
196
197/* After that, we need two instructions to load the index, followed by
198 a branch. */
199#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
200#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
201
202/* Instructions used by the save and restore reg functions. */
203#define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
204#define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
205#define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
206#define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
207#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
208#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
209#define LI_R12_0 0x39800000 /* li %r12,0 */
210#define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
211#define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
212#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
213#define BLR 0x4e800020 /* blr */
214
215/* Since .opd is an array of descriptors and each entry will end up
216 with identical R_PPC64_RELATIVE relocs, there is really no need to
217 propagate .opd relocs; The dynamic linker should be taught to
218 relocate .opd without reloc entries. */
219#ifndef NO_OPD_RELOCS
220#define NO_OPD_RELOCS 0
221#endif
222\f
223#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
224
225/* Relocation HOWTO's. */
226static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
227
228static reloc_howto_type ppc64_elf_howto_raw[] = {
229 /* This reloc does nothing. */
230 HOWTO (R_PPC64_NONE, /* type */
231 0, /* rightshift */
232 2, /* size (0 = byte, 1 = short, 2 = long) */
233 32, /* bitsize */
234 FALSE, /* pc_relative */
235 0, /* bitpos */
236 complain_overflow_dont, /* complain_on_overflow */
237 bfd_elf_generic_reloc, /* special_function */
238 "R_PPC64_NONE", /* name */
239 FALSE, /* partial_inplace */
240 0, /* src_mask */
241 0, /* dst_mask */
242 FALSE), /* pcrel_offset */
243
244 /* A standard 32 bit relocation. */
245 HOWTO (R_PPC64_ADDR32, /* type */
246 0, /* rightshift */
247 2, /* size (0 = byte, 1 = short, 2 = long) */
248 32, /* bitsize */
249 FALSE, /* pc_relative */
250 0, /* bitpos */
251 complain_overflow_bitfield, /* complain_on_overflow */
252 bfd_elf_generic_reloc, /* special_function */
253 "R_PPC64_ADDR32", /* name */
254 FALSE, /* partial_inplace */
255 0, /* src_mask */
256 0xffffffff, /* dst_mask */
257 FALSE), /* pcrel_offset */
258
259 /* An absolute 26 bit branch; the lower two bits must be zero.
260 FIXME: we don't check that, we just clear them. */
261 HOWTO (R_PPC64_ADDR24, /* type */
262 0, /* rightshift */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
264 26, /* bitsize */
265 FALSE, /* pc_relative */
266 0, /* bitpos */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_PPC64_ADDR24", /* name */
270 FALSE, /* partial_inplace */
271 0, /* src_mask */
272 0x03fffffc, /* dst_mask */
273 FALSE), /* pcrel_offset */
274
275 /* A standard 16 bit relocation. */
276 HOWTO (R_PPC64_ADDR16, /* type */
277 0, /* rightshift */
278 1, /* size (0 = byte, 1 = short, 2 = long) */
279 16, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_PPC64_ADDR16", /* name */
285 FALSE, /* partial_inplace */
286 0, /* src_mask */
287 0xffff, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* A 16 bit relocation without overflow. */
291 HOWTO (R_PPC64_ADDR16_LO, /* type */
292 0, /* rightshift */
293 1, /* size (0 = byte, 1 = short, 2 = long) */
294 16, /* bitsize */
295 FALSE, /* pc_relative */
296 0, /* bitpos */
297 complain_overflow_dont,/* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_PPC64_ADDR16_LO", /* name */
300 FALSE, /* partial_inplace */
301 0, /* src_mask */
302 0xffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
304
305 /* Bits 16-31 of an address. */
306 HOWTO (R_PPC64_ADDR16_HI, /* type */
307 16, /* rightshift */
308 1, /* size (0 = byte, 1 = short, 2 = long) */
309 16, /* bitsize */
310 FALSE, /* pc_relative */
311 0, /* bitpos */
312 complain_overflow_dont, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_PPC64_ADDR16_HI", /* name */
315 FALSE, /* partial_inplace */
316 0, /* src_mask */
317 0xffff, /* dst_mask */
318 FALSE), /* pcrel_offset */
319
320 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
321 bits, treated as a signed number, is negative. */
322 HOWTO (R_PPC64_ADDR16_HA, /* type */
323 16, /* rightshift */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_dont, /* complain_on_overflow */
329 ppc64_elf_ha_reloc, /* special_function */
330 "R_PPC64_ADDR16_HA", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* An absolute 16 bit branch; the lower two bits must be zero.
337 FIXME: we don't check that, we just clear them. */
338 HOWTO (R_PPC64_ADDR14, /* type */
339 0, /* rightshift */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 FALSE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 ppc64_elf_branch_reloc, /* special_function */
346 "R_PPC64_ADDR14", /* name */
347 FALSE, /* partial_inplace */
348 0, /* src_mask */
349 0x0000fffc, /* dst_mask */
350 FALSE), /* pcrel_offset */
351
352 /* An absolute 16 bit branch, for which bit 10 should be set to
353 indicate that the branch is expected to be taken. The lower two
354 bits must be zero. */
355 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
356 0, /* rightshift */
357 2, /* size (0 = byte, 1 = short, 2 = long) */
358 16, /* bitsize */
359 FALSE, /* pc_relative */
360 0, /* bitpos */
361 complain_overflow_bitfield, /* complain_on_overflow */
362 ppc64_elf_brtaken_reloc, /* special_function */
363 "R_PPC64_ADDR14_BRTAKEN",/* name */
364 FALSE, /* partial_inplace */
365 0, /* src_mask */
366 0x0000fffc, /* dst_mask */
367 FALSE), /* pcrel_offset */
368
369 /* An absolute 16 bit branch, for which bit 10 should be set to
370 indicate that the branch is not expected to be taken. The lower
371 two bits must be zero. */
372 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
373 0, /* rightshift */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
375 16, /* bitsize */
376 FALSE, /* pc_relative */
377 0, /* bitpos */
378 complain_overflow_bitfield, /* complain_on_overflow */
379 ppc64_elf_brtaken_reloc, /* special_function */
380 "R_PPC64_ADDR14_BRNTAKEN",/* name */
381 FALSE, /* partial_inplace */
382 0, /* src_mask */
383 0x0000fffc, /* dst_mask */
384 FALSE), /* pcrel_offset */
385
386 /* A relative 26 bit branch; the lower two bits must be zero. */
387 HOWTO (R_PPC64_REL24, /* type */
388 0, /* rightshift */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
390 26, /* bitsize */
391 TRUE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_signed, /* complain_on_overflow */
394 ppc64_elf_branch_reloc, /* special_function */
395 "R_PPC64_REL24", /* name */
396 FALSE, /* partial_inplace */
397 0, /* src_mask */
398 0x03fffffc, /* dst_mask */
399 TRUE), /* pcrel_offset */
400
401 /* A relative 16 bit branch; the lower two bits must be zero. */
402 HOWTO (R_PPC64_REL14, /* type */
403 0, /* rightshift */
404 2, /* size (0 = byte, 1 = short, 2 = long) */
405 16, /* bitsize */
406 TRUE, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_signed, /* complain_on_overflow */
409 ppc64_elf_branch_reloc, /* special_function */
410 "R_PPC64_REL14", /* name */
411 FALSE, /* partial_inplace */
412 0, /* src_mask */
413 0x0000fffc, /* dst_mask */
414 TRUE), /* pcrel_offset */
415
416 /* A relative 16 bit branch. Bit 10 should be set to indicate that
417 the branch is expected to be taken. The lower two bits must be
418 zero. */
419 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
420 0, /* rightshift */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 TRUE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_signed, /* complain_on_overflow */
426 ppc64_elf_brtaken_reloc, /* special_function */
427 "R_PPC64_REL14_BRTAKEN", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0x0000fffc, /* dst_mask */
431 TRUE), /* pcrel_offset */
432
433 /* A relative 16 bit branch. Bit 10 should be set to indicate that
434 the branch is not expected to be taken. The lower two bits must
435 be zero. */
436 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 16, /* bitsize */
440 TRUE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_signed, /* complain_on_overflow */
443 ppc64_elf_brtaken_reloc, /* special_function */
444 "R_PPC64_REL14_BRNTAKEN",/* name */
445 FALSE, /* partial_inplace */
446 0, /* src_mask */
447 0x0000fffc, /* dst_mask */
448 TRUE), /* pcrel_offset */
449
450 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
451 symbol. */
452 HOWTO (R_PPC64_GOT16, /* type */
453 0, /* rightshift */
454 1, /* size (0 = byte, 1 = short, 2 = long) */
455 16, /* bitsize */
456 FALSE, /* pc_relative */
457 0, /* bitpos */
458 complain_overflow_signed, /* complain_on_overflow */
459 ppc64_elf_unhandled_reloc, /* special_function */
460 "R_PPC64_GOT16", /* name */
461 FALSE, /* partial_inplace */
462 0, /* src_mask */
463 0xffff, /* dst_mask */
464 FALSE), /* pcrel_offset */
465
466 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
467 the symbol. */
468 HOWTO (R_PPC64_GOT16_LO, /* type */
469 0, /* rightshift */
470 1, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 ppc64_elf_unhandled_reloc, /* special_function */
476 "R_PPC64_GOT16_LO", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0xffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
483 the symbol. */
484 HOWTO (R_PPC64_GOT16_HI, /* type */
485 16, /* rightshift */
486 1, /* size (0 = byte, 1 = short, 2 = long) */
487 16, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_dont,/* complain_on_overflow */
491 ppc64_elf_unhandled_reloc, /* special_function */
492 "R_PPC64_GOT16_HI", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
499 the symbol. */
500 HOWTO (R_PPC64_GOT16_HA, /* type */
501 16, /* rightshift */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
503 16, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_dont,/* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16_HA", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* This is used only by the dynamic linker. The symbol should exist
515 both in the object being run and in some shared library. The
516 dynamic linker copies the data addressed by the symbol from the
517 shared library into the object, because the object being
518 run has to have the data at some particular address. */
519 HOWTO (R_PPC64_COPY, /* type */
520 0, /* rightshift */
521 0, /* this one is variable size */
522 0, /* bitsize */
523 FALSE, /* pc_relative */
524 0, /* bitpos */
525 complain_overflow_dont, /* complain_on_overflow */
526 ppc64_elf_unhandled_reloc, /* special_function */
527 "R_PPC64_COPY", /* name */
528 FALSE, /* partial_inplace */
529 0, /* src_mask */
530 0, /* dst_mask */
531 FALSE), /* pcrel_offset */
532
533 /* Like R_PPC64_ADDR64, but used when setting global offset table
534 entries. */
535 HOWTO (R_PPC64_GLOB_DAT, /* type */
536 0, /* rightshift */
537 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
538 64, /* bitsize */
539 FALSE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_dont, /* complain_on_overflow */
542 ppc64_elf_unhandled_reloc, /* special_function */
543 "R_PPC64_GLOB_DAT", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 ONES (64), /* dst_mask */
547 FALSE), /* pcrel_offset */
548
549 /* Created by the link editor. Marks a procedure linkage table
550 entry for a symbol. */
551 HOWTO (R_PPC64_JMP_SLOT, /* type */
552 0, /* rightshift */
553 0, /* size (0 = byte, 1 = short, 2 = long) */
554 0, /* bitsize */
555 FALSE, /* pc_relative */
556 0, /* bitpos */
557 complain_overflow_dont, /* complain_on_overflow */
558 ppc64_elf_unhandled_reloc, /* special_function */
559 "R_PPC64_JMP_SLOT", /* name */
560 FALSE, /* partial_inplace */
561 0, /* src_mask */
562 0, /* dst_mask */
563 FALSE), /* pcrel_offset */
564
565 /* Used only by the dynamic linker. When the object is run, this
566 doubleword64 is set to the load address of the object, plus the
567 addend. */
568 HOWTO (R_PPC64_RELATIVE, /* type */
569 0, /* rightshift */
570 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
571 64, /* bitsize */
572 FALSE, /* pc_relative */
573 0, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_PPC64_RELATIVE", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 ONES (64), /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 /* Like R_PPC64_ADDR32, but may be unaligned. */
583 HOWTO (R_PPC64_UADDR32, /* type */
584 0, /* rightshift */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
586 32, /* bitsize */
587 FALSE, /* pc_relative */
588 0, /* bitpos */
589 complain_overflow_bitfield, /* complain_on_overflow */
590 bfd_elf_generic_reloc, /* special_function */
591 "R_PPC64_UADDR32", /* name */
592 FALSE, /* partial_inplace */
593 0, /* src_mask */
594 0xffffffff, /* dst_mask */
595 FALSE), /* pcrel_offset */
596
597 /* Like R_PPC64_ADDR16, but may be unaligned. */
598 HOWTO (R_PPC64_UADDR16, /* type */
599 0, /* rightshift */
600 1, /* size (0 = byte, 1 = short, 2 = long) */
601 16, /* bitsize */
602 FALSE, /* pc_relative */
603 0, /* bitpos */
604 complain_overflow_bitfield, /* complain_on_overflow */
605 bfd_elf_generic_reloc, /* special_function */
606 "R_PPC64_UADDR16", /* name */
607 FALSE, /* partial_inplace */
608 0, /* src_mask */
609 0xffff, /* dst_mask */
610 FALSE), /* pcrel_offset */
611
612 /* 32-bit PC relative. */
613 HOWTO (R_PPC64_REL32, /* type */
614 0, /* rightshift */
615 2, /* size (0 = byte, 1 = short, 2 = long) */
616 32, /* bitsize */
617 TRUE, /* pc_relative */
618 0, /* bitpos */
619 /* FIXME: Verify. Was complain_overflow_bitfield. */
620 complain_overflow_signed, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 "R_PPC64_REL32", /* name */
623 FALSE, /* partial_inplace */
624 0, /* src_mask */
625 0xffffffff, /* dst_mask */
626 TRUE), /* pcrel_offset */
627
628 /* 32-bit relocation to the symbol's procedure linkage table. */
629 HOWTO (R_PPC64_PLT32, /* type */
630 0, /* rightshift */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
632 32, /* bitsize */
633 FALSE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_bitfield, /* complain_on_overflow */
636 ppc64_elf_unhandled_reloc, /* special_function */
637 "R_PPC64_PLT32", /* name */
638 FALSE, /* partial_inplace */
639 0, /* src_mask */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
642
643 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
644 FIXME: R_PPC64_PLTREL32 not supported. */
645 HOWTO (R_PPC64_PLTREL32, /* type */
646 0, /* rightshift */
647 2, /* size (0 = byte, 1 = short, 2 = long) */
648 32, /* bitsize */
649 TRUE, /* pc_relative */
650 0, /* bitpos */
651 complain_overflow_signed, /* complain_on_overflow */
652 bfd_elf_generic_reloc, /* special_function */
653 "R_PPC64_PLTREL32", /* name */
654 FALSE, /* partial_inplace */
655 0, /* src_mask */
656 0xffffffff, /* dst_mask */
657 TRUE), /* pcrel_offset */
658
659 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
660 the symbol. */
661 HOWTO (R_PPC64_PLT16_LO, /* type */
662 0, /* rightshift */
663 1, /* size (0 = byte, 1 = short, 2 = long) */
664 16, /* bitsize */
665 FALSE, /* pc_relative */
666 0, /* bitpos */
667 complain_overflow_dont, /* complain_on_overflow */
668 ppc64_elf_unhandled_reloc, /* special_function */
669 "R_PPC64_PLT16_LO", /* name */
670 FALSE, /* partial_inplace */
671 0, /* src_mask */
672 0xffff, /* dst_mask */
673 FALSE), /* pcrel_offset */
674
675 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
676 the symbol. */
677 HOWTO (R_PPC64_PLT16_HI, /* type */
678 16, /* rightshift */
679 1, /* size (0 = byte, 1 = short, 2 = long) */
680 16, /* bitsize */
681 FALSE, /* pc_relative */
682 0, /* bitpos */
683 complain_overflow_dont, /* complain_on_overflow */
684 ppc64_elf_unhandled_reloc, /* special_function */
685 "R_PPC64_PLT16_HI", /* name */
686 FALSE, /* partial_inplace */
687 0, /* src_mask */
688 0xffff, /* dst_mask */
689 FALSE), /* pcrel_offset */
690
691 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
692 the symbol. */
693 HOWTO (R_PPC64_PLT16_HA, /* type */
694 16, /* rightshift */
695 1, /* size (0 = byte, 1 = short, 2 = long) */
696 16, /* bitsize */
697 FALSE, /* pc_relative */
698 0, /* bitpos */
699 complain_overflow_dont, /* complain_on_overflow */
700 ppc64_elf_unhandled_reloc, /* special_function */
701 "R_PPC64_PLT16_HA", /* name */
702 FALSE, /* partial_inplace */
703 0, /* src_mask */
704 0xffff, /* dst_mask */
705 FALSE), /* pcrel_offset */
706
707 /* 16-bit section relative relocation. */
708 HOWTO (R_PPC64_SECTOFF, /* type */
709 0, /* rightshift */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
711 16, /* bitsize */
712 FALSE, /* pc_relative */
713 0, /* bitpos */
714 complain_overflow_bitfield, /* complain_on_overflow */
715 ppc64_elf_sectoff_reloc, /* special_function */
716 "R_PPC64_SECTOFF", /* name */
717 FALSE, /* partial_inplace */
718 0, /* src_mask */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
721
722 /* Like R_PPC64_SECTOFF, but no overflow warning. */
723 HOWTO (R_PPC64_SECTOFF_LO, /* type */
724 0, /* rightshift */
725 1, /* size (0 = byte, 1 = short, 2 = long) */
726 16, /* bitsize */
727 FALSE, /* pc_relative */
728 0, /* bitpos */
729 complain_overflow_dont, /* complain_on_overflow */
730 ppc64_elf_sectoff_reloc, /* special_function */
731 "R_PPC64_SECTOFF_LO", /* name */
732 FALSE, /* partial_inplace */
733 0, /* src_mask */
734 0xffff, /* dst_mask */
735 FALSE), /* pcrel_offset */
736
737 /* 16-bit upper half section relative relocation. */
738 HOWTO (R_PPC64_SECTOFF_HI, /* type */
739 16, /* rightshift */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
741 16, /* bitsize */
742 FALSE, /* pc_relative */
743 0, /* bitpos */
744 complain_overflow_dont, /* complain_on_overflow */
745 ppc64_elf_sectoff_reloc, /* special_function */
746 "R_PPC64_SECTOFF_HI", /* name */
747 FALSE, /* partial_inplace */
748 0, /* src_mask */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
751
752 /* 16-bit upper half adjusted section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF_HA, /* type */
754 16, /* rightshift */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
756 16, /* bitsize */
757 FALSE, /* pc_relative */
758 0, /* bitpos */
759 complain_overflow_dont, /* complain_on_overflow */
760 ppc64_elf_sectoff_ha_reloc, /* special_function */
761 "R_PPC64_SECTOFF_HA", /* name */
762 FALSE, /* partial_inplace */
763 0, /* src_mask */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
766
767 /* Like R_PPC64_REL24 without touching the two least significant bits. */
768 HOWTO (R_PPC64_REL30, /* type */
769 2, /* rightshift */
770 2, /* size (0 = byte, 1 = short, 2 = long) */
771 30, /* bitsize */
772 TRUE, /* pc_relative */
773 0, /* bitpos */
774 complain_overflow_dont, /* complain_on_overflow */
775 bfd_elf_generic_reloc, /* special_function */
776 "R_PPC64_REL30", /* name */
777 FALSE, /* partial_inplace */
778 0, /* src_mask */
779 0xfffffffc, /* dst_mask */
780 TRUE), /* pcrel_offset */
781
782 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
783
784 /* A standard 64-bit relocation. */
785 HOWTO (R_PPC64_ADDR64, /* type */
786 0, /* rightshift */
787 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
788 64, /* bitsize */
789 FALSE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC64_ADDR64", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 ONES (64), /* dst_mask */
797 FALSE), /* pcrel_offset */
798
799 /* The bits 32-47 of an address. */
800 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
801 32, /* rightshift */
802 1, /* size (0 = byte, 1 = short, 2 = long) */
803 16, /* bitsize */
804 FALSE, /* pc_relative */
805 0, /* bitpos */
806 complain_overflow_dont, /* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_PPC64_ADDR16_HIGHER", /* name */
809 FALSE, /* partial_inplace */
810 0, /* src_mask */
811 0xffff, /* dst_mask */
812 FALSE), /* pcrel_offset */
813
814 /* The bits 32-47 of an address, plus 1 if the contents of the low
815 16 bits, treated as a signed number, is negative. */
816 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
817 32, /* rightshift */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
819 16, /* bitsize */
820 FALSE, /* pc_relative */
821 0, /* bitpos */
822 complain_overflow_dont, /* complain_on_overflow */
823 ppc64_elf_ha_reloc, /* special_function */
824 "R_PPC64_ADDR16_HIGHERA", /* name */
825 FALSE, /* partial_inplace */
826 0, /* src_mask */
827 0xffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
829
830 /* The bits 48-63 of an address. */
831 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
832 48, /* rightshift */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
834 16, /* bitsize */
835 FALSE, /* pc_relative */
836 0, /* bitpos */
837 complain_overflow_dont, /* complain_on_overflow */
838 bfd_elf_generic_reloc, /* special_function */
839 "R_PPC64_ADDR16_HIGHEST", /* name */
840 FALSE, /* partial_inplace */
841 0, /* src_mask */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
844
845 /* The bits 48-63 of an address, plus 1 if the contents of the low
846 16 bits, treated as a signed number, is negative. */
847 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
848 48, /* rightshift */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
850 16, /* bitsize */
851 FALSE, /* pc_relative */
852 0, /* bitpos */
853 complain_overflow_dont, /* complain_on_overflow */
854 ppc64_elf_ha_reloc, /* special_function */
855 "R_PPC64_ADDR16_HIGHESTA", /* name */
856 FALSE, /* partial_inplace */
857 0, /* src_mask */
858 0xffff, /* dst_mask */
859 FALSE), /* pcrel_offset */
860
861 /* Like ADDR64, but may be unaligned. */
862 HOWTO (R_PPC64_UADDR64, /* type */
863 0, /* rightshift */
864 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
865 64, /* bitsize */
866 FALSE, /* pc_relative */
867 0, /* bitpos */
868 complain_overflow_dont, /* complain_on_overflow */
869 bfd_elf_generic_reloc, /* special_function */
870 "R_PPC64_UADDR64", /* name */
871 FALSE, /* partial_inplace */
872 0, /* src_mask */
873 ONES (64), /* dst_mask */
874 FALSE), /* pcrel_offset */
875
876 /* 64-bit relative relocation. */
877 HOWTO (R_PPC64_REL64, /* type */
878 0, /* rightshift */
879 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
880 64, /* bitsize */
881 TRUE, /* pc_relative */
882 0, /* bitpos */
883 complain_overflow_dont, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC64_REL64", /* name */
886 FALSE, /* partial_inplace */
887 0, /* src_mask */
888 ONES (64), /* dst_mask */
889 TRUE), /* pcrel_offset */
890
891 /* 64-bit relocation to the symbol's procedure linkage table. */
892 HOWTO (R_PPC64_PLT64, /* type */
893 0, /* rightshift */
894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
895 64, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 ppc64_elf_unhandled_reloc, /* special_function */
900 "R_PPC64_PLT64", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 ONES (64), /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 /* 64-bit PC relative relocation to the symbol's procedure linkage
907 table. */
908 /* FIXME: R_PPC64_PLTREL64 not supported. */
909 HOWTO (R_PPC64_PLTREL64, /* type */
910 0, /* rightshift */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
912 64, /* bitsize */
913 TRUE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_dont, /* complain_on_overflow */
916 ppc64_elf_unhandled_reloc, /* special_function */
917 "R_PPC64_PLTREL64", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 ONES (64), /* dst_mask */
921 TRUE), /* pcrel_offset */
922
923 /* 16 bit TOC-relative relocation. */
924
925 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
926 HOWTO (R_PPC64_TOC16, /* type */
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc64_elf_toc_reloc, /* special_function */
934 "R_PPC64_TOC16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* 16 bit TOC-relative relocation without overflow. */
941
942 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
943 HOWTO (R_PPC64_TOC16_LO, /* type */
944 0, /* rightshift */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
946 16, /* bitsize */
947 FALSE, /* pc_relative */
948 0, /* bitpos */
949 complain_overflow_dont, /* complain_on_overflow */
950 ppc64_elf_toc_reloc, /* special_function */
951 "R_PPC64_TOC16_LO", /* name */
952 FALSE, /* partial_inplace */
953 0, /* src_mask */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
956
957 /* 16 bit TOC-relative relocation, high 16 bits. */
958
959 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
960 HOWTO (R_PPC64_TOC16_HI, /* type */
961 16, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_dont, /* complain_on_overflow */
967 ppc64_elf_toc_reloc, /* special_function */
968 "R_PPC64_TOC16_HI", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
975 contents of the low 16 bits, treated as a signed number, is
976 negative. */
977
978 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
979 HOWTO (R_PPC64_TOC16_HA, /* type */
980 16, /* rightshift */
981 1, /* size (0 = byte, 1 = short, 2 = long) */
982 16, /* bitsize */
983 FALSE, /* pc_relative */
984 0, /* bitpos */
985 complain_overflow_dont, /* complain_on_overflow */
986 ppc64_elf_toc_ha_reloc, /* special_function */
987 "R_PPC64_TOC16_HA", /* name */
988 FALSE, /* partial_inplace */
989 0, /* src_mask */
990 0xffff, /* dst_mask */
991 FALSE), /* pcrel_offset */
992
993 /* 64-bit relocation; insert value of TOC base (.TOC.). */
994
995 /* R_PPC64_TOC 51 doubleword64 .TOC. */
996 HOWTO (R_PPC64_TOC, /* type */
997 0, /* rightshift */
998 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
999 64, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_bitfield, /* complain_on_overflow */
1003 ppc64_elf_toc64_reloc, /* special_function */
1004 "R_PPC64_TOC", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 ONES (64), /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* Like R_PPC64_GOT16, but also informs the link editor that the
1011 value to relocate may (!) refer to a PLT entry which the link
1012 editor (a) may replace with the symbol value. If the link editor
1013 is unable to fully resolve the symbol, it may (b) create a PLT
1014 entry and store the address to the new PLT entry in the GOT.
1015 This permits lazy resolution of function symbols at run time.
1016 The link editor may also skip all of this and just (c) emit a
1017 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1018 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1019 HOWTO (R_PPC64_PLTGOT16, /* type */
1020 0, /* rightshift */
1021 1, /* size (0 = byte, 1 = short, 2 = long) */
1022 16, /* bitsize */
1023 FALSE, /* pc_relative */
1024 0, /* bitpos */
1025 complain_overflow_signed, /* complain_on_overflow */
1026 ppc64_elf_unhandled_reloc, /* special_function */
1027 "R_PPC64_PLTGOT16", /* name */
1028 FALSE, /* partial_inplace */
1029 0, /* src_mask */
1030 0xffff, /* dst_mask */
1031 FALSE), /* pcrel_offset */
1032
1033 /* Like R_PPC64_PLTGOT16, but without overflow. */
1034 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1035 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1036 0, /* rightshift */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1038 16, /* bitsize */
1039 FALSE, /* pc_relative */
1040 0, /* bitpos */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 ppc64_elf_unhandled_reloc, /* special_function */
1043 "R_PPC64_PLTGOT16_LO", /* name */
1044 FALSE, /* partial_inplace */
1045 0, /* src_mask */
1046 0xffff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
1048
1049 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1050 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1051 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1052 16, /* rightshift */
1053 1, /* size (0 = byte, 1 = short, 2 = long) */
1054 16, /* bitsize */
1055 FALSE, /* pc_relative */
1056 0, /* bitpos */
1057 complain_overflow_dont, /* complain_on_overflow */
1058 ppc64_elf_unhandled_reloc, /* special_function */
1059 "R_PPC64_PLTGOT16_HI", /* name */
1060 FALSE, /* partial_inplace */
1061 0, /* src_mask */
1062 0xffff, /* dst_mask */
1063 FALSE), /* pcrel_offset */
1064
1065 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1066 1 if the contents of the low 16 bits, treated as a signed number,
1067 is negative. */
1068 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1069 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1070 16, /* rightshift */
1071 1, /* size (0 = byte, 1 = short, 2 = long) */
1072 16, /* bitsize */
1073 FALSE, /* pc_relative */
1074 0, /* bitpos */
1075 complain_overflow_dont,/* complain_on_overflow */
1076 ppc64_elf_unhandled_reloc, /* special_function */
1077 "R_PPC64_PLTGOT16_HA", /* name */
1078 FALSE, /* partial_inplace */
1079 0, /* src_mask */
1080 0xffff, /* dst_mask */
1081 FALSE), /* pcrel_offset */
1082
1083 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1084 HOWTO (R_PPC64_ADDR16_DS, /* type */
1085 0, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_bitfield, /* complain_on_overflow */
1091 bfd_elf_generic_reloc, /* special_function */
1092 "R_PPC64_ADDR16_DS", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xfffc, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1099 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1100 0, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_dont,/* complain_on_overflow */
1106 bfd_elf_generic_reloc, /* special_function */
1107 "R_PPC64_ADDR16_LO_DS",/* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xfffc, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_GOT16_DS, /* type */
1115 0, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc64_elf_unhandled_reloc, /* special_function */
1122 "R_PPC64_GOT16_DS", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xfffc, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc64_elf_unhandled_reloc, /* special_function */
1137 "R_PPC64_GOT16_LO_DS", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1145 0, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_dont, /* complain_on_overflow */
1151 ppc64_elf_unhandled_reloc, /* special_function */
1152 "R_PPC64_PLT16_LO_DS", /* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1160 0, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_bitfield, /* complain_on_overflow */
1166 ppc64_elf_sectoff_reloc, /* special_function */
1167 "R_PPC64_SECTOFF_DS", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1175 0, /* rightshift */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 16, /* bitsize */
1178 FALSE, /* pc_relative */
1179 0, /* bitpos */
1180 complain_overflow_dont, /* complain_on_overflow */
1181 ppc64_elf_sectoff_reloc, /* special_function */
1182 "R_PPC64_SECTOFF_LO_DS",/* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_TOC16_DS, /* type */
1190 0, /* rightshift */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1192 16, /* bitsize */
1193 FALSE, /* pc_relative */
1194 0, /* bitpos */
1195 complain_overflow_signed, /* complain_on_overflow */
1196 ppc64_elf_toc_reloc, /* special_function */
1197 "R_PPC64_TOC16_DS", /* name */
1198 FALSE, /* partial_inplace */
1199 0, /* src_mask */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1202
1203 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1205 0, /* rightshift */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1207 16, /* bitsize */
1208 FALSE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_dont, /* complain_on_overflow */
1211 ppc64_elf_toc_reloc, /* special_function */
1212 "R_PPC64_TOC16_LO_DS", /* name */
1213 FALSE, /* partial_inplace */
1214 0, /* src_mask */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1217
1218 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1219 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1220 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1221 0, /* rightshift */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1223 16, /* bitsize */
1224 FALSE, /* pc_relative */
1225 0, /* bitpos */
1226 complain_overflow_signed, /* complain_on_overflow */
1227 ppc64_elf_unhandled_reloc, /* special_function */
1228 "R_PPC64_PLTGOT16_DS", /* name */
1229 FALSE, /* partial_inplace */
1230 0, /* src_mask */
1231 0xfffc, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1233
1234 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1235 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1236 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1237 0, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc64_elf_unhandled_reloc, /* special_function */
1244 "R_PPC64_PLTGOT16_LO_DS",/* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xfffc, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Marker relocs for TLS. */
1251 HOWTO (R_PPC64_TLS,
1252 0, /* rightshift */
1253 2, /* size (0 = byte, 1 = short, 2 = long) */
1254 32, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 bfd_elf_generic_reloc, /* special_function */
1259 "R_PPC64_TLS", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 HOWTO (R_PPC64_TLSGD,
1266 0, /* rightshift */
1267 2, /* size (0 = byte, 1 = short, 2 = long) */
1268 32, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont, /* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC64_TLSGD", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 HOWTO (R_PPC64_TLSLD,
1280 0, /* rightshift */
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1282 32, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC64_TLSLD", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 HOWTO (R_PPC64_TOCSAVE,
1294 0, /* rightshift */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 32, /* bitsize */
1297 FALSE, /* pc_relative */
1298 0, /* bitpos */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TOCSAVE", /* name */
1302 FALSE, /* partial_inplace */
1303 0, /* src_mask */
1304 0, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1306
1307 /* Computes the load module index of the load module that contains the
1308 definition of its TLS sym. */
1309 HOWTO (R_PPC64_DTPMOD64,
1310 0, /* rightshift */
1311 4, /* size (0 = byte, 1 = short, 2 = long) */
1312 64, /* bitsize */
1313 FALSE, /* pc_relative */
1314 0, /* bitpos */
1315 complain_overflow_dont, /* complain_on_overflow */
1316 ppc64_elf_unhandled_reloc, /* special_function */
1317 "R_PPC64_DTPMOD64", /* name */
1318 FALSE, /* partial_inplace */
1319 0, /* src_mask */
1320 ONES (64), /* dst_mask */
1321 FALSE), /* pcrel_offset */
1322
1323 /* Computes a dtv-relative displacement, the difference between the value
1324 of sym+add and the base address of the thread-local storage block that
1325 contains the definition of sym, minus 0x8000. */
1326 HOWTO (R_PPC64_DTPREL64,
1327 0, /* rightshift */
1328 4, /* size (0 = byte, 1 = short, 2 = long) */
1329 64, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPREL64", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 ONES (64), /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* A 16 bit dtprel reloc. */
1341 HOWTO (R_PPC64_DTPREL16,
1342 0, /* rightshift */
1343 1, /* size (0 = byte, 1 = short, 2 = long) */
1344 16, /* bitsize */
1345 FALSE, /* pc_relative */
1346 0, /* bitpos */
1347 complain_overflow_signed, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL16", /* name */
1350 FALSE, /* partial_inplace */
1351 0, /* src_mask */
1352 0xffff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1354
1355 /* Like DTPREL16, but no overflow. */
1356 HOWTO (R_PPC64_DTPREL16_LO,
1357 0, /* rightshift */
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16_LO", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1371 HOWTO (R_PPC64_DTPREL16_HI,
1372 16, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_HI", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1386 HOWTO (R_PPC64_DTPREL16_HA,
1387 16, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HA", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1401 HOWTO (R_PPC64_DTPREL16_HIGHER,
1402 32, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_HIGHER", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1417 32, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HIGHERA", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1432 48, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1434 16, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HIGHEST", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1447 48, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* Like DTPREL16, but for insns with a DS field. */
1461 HOWTO (R_PPC64_DTPREL16_DS,
1462 0, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 16, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_signed, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_DS", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0xfffc, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* Like DTPREL16_DS, but no overflow. */
1476 HOWTO (R_PPC64_DTPREL16_LO_DS,
1477 0, /* rightshift */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1479 16, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_LO_DS", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0xfffc, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Computes a tp-relative displacement, the difference between the value of
1491 sym+add and the value of the thread pointer (r13). */
1492 HOWTO (R_PPC64_TPREL64,
1493 0, /* rightshift */
1494 4, /* size (0 = byte, 1 = short, 2 = long) */
1495 64, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc64_elf_unhandled_reloc, /* special_function */
1500 "R_PPC64_TPREL64", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 ONES (64), /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* A 16 bit tprel reloc. */
1507 HOWTO (R_PPC64_TPREL16,
1508 0, /* rightshift */
1509 1, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_signed, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL16", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0xffff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Like TPREL16, but no overflow. */
1522 HOWTO (R_PPC64_TPREL16_LO,
1523 0, /* rightshift */
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16_LO", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* Like TPREL16_LO, but next higher group of 16 bits. */
1537 HOWTO (R_PPC64_TPREL16_HI,
1538 16, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1540 16, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_HI", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* Like TPREL16_HI, but adjust for low 16 bits. */
1552 HOWTO (R_PPC64_TPREL16_HA,
1553 16, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_dont, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HA", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16_HI, but next higher group of 16 bits. */
1567 HOWTO (R_PPC64_TPREL16_HIGHER,
1568 32, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_dont, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_HIGHER", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HIGHERA,
1583 32, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HIGHERA", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HIGHEST,
1598 48, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1600 16, /* bitsize */
1601 FALSE, /* pc_relative */
1602 0, /* bitpos */
1603 complain_overflow_dont, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HIGHEST", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1613 48, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1615 16, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHESTA", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like TPREL16, but for insns with a DS field. */
1627 HOWTO (R_PPC64_TPREL16_DS,
1628 0, /* rightshift */
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1630 16, /* bitsize */
1631 FALSE, /* pc_relative */
1632 0, /* bitpos */
1633 complain_overflow_signed, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_DS", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xfffc, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Like TPREL16_DS, but no overflow. */
1642 HOWTO (R_PPC64_TPREL16_LO_DS,
1643 0, /* rightshift */
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1645 16, /* bitsize */
1646 FALSE, /* pc_relative */
1647 0, /* bitpos */
1648 complain_overflow_dont, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_LO_DS", /* name */
1651 FALSE, /* partial_inplace */
1652 0, /* src_mask */
1653 0xfffc, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1655
1656 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1657 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1658 to the first entry relative to the TOC base (r2). */
1659 HOWTO (R_PPC64_GOT_TLSGD16,
1660 0, /* rightshift */
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1662 16, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_signed, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_GOT_TLSGD16", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* Like GOT_TLSGD16, but no overflow. */
1674 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc64_elf_unhandled_reloc, /* special_function */
1682 "R_PPC64_GOT_TLSGD16_LO", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1689 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1690 16, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 FALSE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSGD16_HI", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1702
1703 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1704 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 FALSE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16_HA", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1717
1718 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1719 with values (sym+add)@dtpmod and zero, and computes the offset to the
1720 first entry relative to the TOC base (r2). */
1721 HOWTO (R_PPC64_GOT_TLSLD16,
1722 0, /* rightshift */
1723 1, /* size (0 = byte, 1 = short, 2 = long) */
1724 16, /* bitsize */
1725 FALSE, /* pc_relative */
1726 0, /* bitpos */
1727 complain_overflow_signed, /* complain_on_overflow */
1728 ppc64_elf_unhandled_reloc, /* special_function */
1729 "R_PPC64_GOT_TLSLD16", /* name */
1730 FALSE, /* partial_inplace */
1731 0, /* src_mask */
1732 0xffff, /* dst_mask */
1733 FALSE), /* pcrel_offset */
1734
1735 /* Like GOT_TLSLD16, but no overflow. */
1736 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1737 0, /* rightshift */
1738 1, /* size (0 = byte, 1 = short, 2 = long) */
1739 16, /* bitsize */
1740 FALSE, /* pc_relative */
1741 0, /* bitpos */
1742 complain_overflow_dont, /* complain_on_overflow */
1743 ppc64_elf_unhandled_reloc, /* special_function */
1744 "R_PPC64_GOT_TLSLD16_LO", /* name */
1745 FALSE, /* partial_inplace */
1746 0, /* src_mask */
1747 0xffff, /* dst_mask */
1748 FALSE), /* pcrel_offset */
1749
1750 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1751 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1752 16, /* rightshift */
1753 1, /* size (0 = byte, 1 = short, 2 = long) */
1754 16, /* bitsize */
1755 FALSE, /* pc_relative */
1756 0, /* bitpos */
1757 complain_overflow_dont, /* complain_on_overflow */
1758 ppc64_elf_unhandled_reloc, /* special_function */
1759 "R_PPC64_GOT_TLSLD16_HI", /* name */
1760 FALSE, /* partial_inplace */
1761 0, /* src_mask */
1762 0xffff, /* dst_mask */
1763 FALSE), /* pcrel_offset */
1764
1765 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1766 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1767 16, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_dont, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16_HA", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779
1780 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1781 the offset to the entry relative to the TOC base (r2). */
1782 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1783 0, /* rightshift */
1784 1, /* size (0 = byte, 1 = short, 2 = long) */
1785 16, /* bitsize */
1786 FALSE, /* pc_relative */
1787 0, /* bitpos */
1788 complain_overflow_signed, /* complain_on_overflow */
1789 ppc64_elf_unhandled_reloc, /* special_function */
1790 "R_PPC64_GOT_DTPREL16_DS", /* name */
1791 FALSE, /* partial_inplace */
1792 0, /* src_mask */
1793 0xfffc, /* dst_mask */
1794 FALSE), /* pcrel_offset */
1795
1796 /* Like GOT_DTPREL16_DS, but no overflow. */
1797 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1798 0, /* rightshift */
1799 1, /* size (0 = byte, 1 = short, 2 = long) */
1800 16, /* bitsize */
1801 FALSE, /* pc_relative */
1802 0, /* bitpos */
1803 complain_overflow_dont, /* complain_on_overflow */
1804 ppc64_elf_unhandled_reloc, /* special_function */
1805 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1806 FALSE, /* partial_inplace */
1807 0, /* src_mask */
1808 0xfffc, /* dst_mask */
1809 FALSE), /* pcrel_offset */
1810
1811 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1812 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1813 16, /* rightshift */
1814 1, /* size (0 = byte, 1 = short, 2 = long) */
1815 16, /* bitsize */
1816 FALSE, /* pc_relative */
1817 0, /* bitpos */
1818 complain_overflow_dont, /* complain_on_overflow */
1819 ppc64_elf_unhandled_reloc, /* special_function */
1820 "R_PPC64_GOT_DTPREL16_HI", /* name */
1821 FALSE, /* partial_inplace */
1822 0, /* src_mask */
1823 0xffff, /* dst_mask */
1824 FALSE), /* pcrel_offset */
1825
1826 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1827 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1828 16, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1830 16, /* bitsize */
1831 FALSE, /* pc_relative */
1832 0, /* bitpos */
1833 complain_overflow_dont, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_HA", /* name */
1836 FALSE, /* partial_inplace */
1837 0, /* src_mask */
1838 0xffff, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1840
1841 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1842 offset to the entry relative to the TOC base (r2). */
1843 HOWTO (R_PPC64_GOT_TPREL16_DS,
1844 0, /* rightshift */
1845 1, /* size (0 = byte, 1 = short, 2 = long) */
1846 16, /* bitsize */
1847 FALSE, /* pc_relative */
1848 0, /* bitpos */
1849 complain_overflow_signed, /* complain_on_overflow */
1850 ppc64_elf_unhandled_reloc, /* special_function */
1851 "R_PPC64_GOT_TPREL16_DS", /* name */
1852 FALSE, /* partial_inplace */
1853 0, /* src_mask */
1854 0xfffc, /* dst_mask */
1855 FALSE), /* pcrel_offset */
1856
1857 /* Like GOT_TPREL16_DS, but no overflow. */
1858 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1859 0, /* rightshift */
1860 1, /* size (0 = byte, 1 = short, 2 = long) */
1861 16, /* bitsize */
1862 FALSE, /* pc_relative */
1863 0, /* bitpos */
1864 complain_overflow_dont, /* complain_on_overflow */
1865 ppc64_elf_unhandled_reloc, /* special_function */
1866 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1867 FALSE, /* partial_inplace */
1868 0, /* src_mask */
1869 0xfffc, /* dst_mask */
1870 FALSE), /* pcrel_offset */
1871
1872 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1873 HOWTO (R_PPC64_GOT_TPREL16_HI,
1874 16, /* rightshift */
1875 1, /* size (0 = byte, 1 = short, 2 = long) */
1876 16, /* bitsize */
1877 FALSE, /* pc_relative */
1878 0, /* bitpos */
1879 complain_overflow_dont, /* complain_on_overflow */
1880 ppc64_elf_unhandled_reloc, /* special_function */
1881 "R_PPC64_GOT_TPREL16_HI", /* name */
1882 FALSE, /* partial_inplace */
1883 0, /* src_mask */
1884 0xffff, /* dst_mask */
1885 FALSE), /* pcrel_offset */
1886
1887 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1888 HOWTO (R_PPC64_GOT_TPREL16_HA,
1889 16, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1891 16, /* bitsize */
1892 FALSE, /* pc_relative */
1893 0, /* bitpos */
1894 complain_overflow_dont, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_HA", /* name */
1897 FALSE, /* partial_inplace */
1898 0, /* src_mask */
1899 0xffff, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1901
1902 HOWTO (R_PPC64_JMP_IREL, /* type */
1903 0, /* rightshift */
1904 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1905 0, /* bitsize */
1906 FALSE, /* pc_relative */
1907 0, /* bitpos */
1908 complain_overflow_dont, /* complain_on_overflow */
1909 ppc64_elf_unhandled_reloc, /* special_function */
1910 "R_PPC64_JMP_IREL", /* name */
1911 FALSE, /* partial_inplace */
1912 0, /* src_mask */
1913 0, /* dst_mask */
1914 FALSE), /* pcrel_offset */
1915
1916 HOWTO (R_PPC64_IRELATIVE, /* type */
1917 0, /* rightshift */
1918 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1919 64, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_dont, /* complain_on_overflow */
1923 bfd_elf_generic_reloc, /* special_function */
1924 "R_PPC64_IRELATIVE", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 ONES (64), /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* A 16 bit relative relocation. */
1931 HOWTO (R_PPC64_REL16, /* type */
1932 0, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 TRUE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_bitfield, /* complain_on_overflow */
1938 bfd_elf_generic_reloc, /* special_function */
1939 "R_PPC64_REL16", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 TRUE), /* pcrel_offset */
1944
1945 /* A 16 bit relative relocation without overflow. */
1946 HOWTO (R_PPC64_REL16_LO, /* type */
1947 0, /* rightshift */
1948 1, /* size (0 = byte, 1 = short, 2 = long) */
1949 16, /* bitsize */
1950 TRUE, /* pc_relative */
1951 0, /* bitpos */
1952 complain_overflow_dont,/* complain_on_overflow */
1953 bfd_elf_generic_reloc, /* special_function */
1954 "R_PPC64_REL16_LO", /* name */
1955 FALSE, /* partial_inplace */
1956 0, /* src_mask */
1957 0xffff, /* dst_mask */
1958 TRUE), /* pcrel_offset */
1959
1960 /* The high order 16 bits of a relative address. */
1961 HOWTO (R_PPC64_REL16_HI, /* type */
1962 16, /* rightshift */
1963 1, /* size (0 = byte, 1 = short, 2 = long) */
1964 16, /* bitsize */
1965 TRUE, /* pc_relative */
1966 0, /* bitpos */
1967 complain_overflow_dont, /* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_REL16_HI", /* name */
1970 FALSE, /* partial_inplace */
1971 0, /* src_mask */
1972 0xffff, /* dst_mask */
1973 TRUE), /* pcrel_offset */
1974
1975 /* The high order 16 bits of a relative address, plus 1 if the contents of
1976 the low 16 bits, treated as a signed number, is negative. */
1977 HOWTO (R_PPC64_REL16_HA, /* type */
1978 16, /* rightshift */
1979 1, /* size (0 = byte, 1 = short, 2 = long) */
1980 16, /* bitsize */
1981 TRUE, /* pc_relative */
1982 0, /* bitpos */
1983 complain_overflow_dont, /* complain_on_overflow */
1984 ppc64_elf_ha_reloc, /* special_function */
1985 "R_PPC64_REL16_HA", /* name */
1986 FALSE, /* partial_inplace */
1987 0, /* src_mask */
1988 0xffff, /* dst_mask */
1989 TRUE), /* pcrel_offset */
1990
1991 /* GNU extension to record C++ vtable hierarchy. */
1992 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1993 0, /* rightshift */
1994 0, /* size (0 = byte, 1 = short, 2 = long) */
1995 0, /* bitsize */
1996 FALSE, /* pc_relative */
1997 0, /* bitpos */
1998 complain_overflow_dont, /* complain_on_overflow */
1999 NULL, /* special_function */
2000 "R_PPC64_GNU_VTINHERIT", /* name */
2001 FALSE, /* partial_inplace */
2002 0, /* src_mask */
2003 0, /* dst_mask */
2004 FALSE), /* pcrel_offset */
2005
2006 /* GNU extension to record C++ vtable member usage. */
2007 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2008 0, /* rightshift */
2009 0, /* size (0 = byte, 1 = short, 2 = long) */
2010 0, /* bitsize */
2011 FALSE, /* pc_relative */
2012 0, /* bitpos */
2013 complain_overflow_dont, /* complain_on_overflow */
2014 NULL, /* special_function */
2015 "R_PPC64_GNU_VTENTRY", /* name */
2016 FALSE, /* partial_inplace */
2017 0, /* src_mask */
2018 0, /* dst_mask */
2019 FALSE), /* pcrel_offset */
2020};
2021
2022\f
2023/* Initialize the ppc64_elf_howto_table, so that linear accesses can
2024 be done. */
2025
2026static void
2027ppc_howto_init (void)
2028{
2029 unsigned int i, type;
2030
2031 for (i = 0;
2032 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2033 i++)
2034 {
2035 type = ppc64_elf_howto_raw[i].type;
2036 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2037 / sizeof (ppc64_elf_howto_table[0])));
2038 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2039 }
2040}
2041
2042static reloc_howto_type *
2043ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2044 bfd_reloc_code_real_type code)
2045{
2046 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2047
2048 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2049 /* Initialize howto table if needed. */
2050 ppc_howto_init ();
2051
2052 switch (code)
2053 {
2054 default:
2055 return NULL;
2056
2057 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2058 break;
2059 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2060 break;
2061 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2062 break;
2063 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2064 break;
2065 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2066 break;
2067 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2068 break;
2069 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2070 break;
2071 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2072 break;
2073 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2074 break;
2075 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2076 break;
2077 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2078 break;
2079 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2080 break;
2081 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2082 break;
2083 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2084 break;
2085 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2086 break;
2087 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2088 break;
2089 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2090 break;
2091 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2092 break;
2093 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2094 break;
2095 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2096 break;
2097 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2098 break;
2099 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2100 break;
2101 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2102 break;
2103 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2104 break;
2105 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2106 break;
2107 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2108 break;
2109 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2110 break;
2111 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2112 break;
2113 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2114 break;
2115 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2116 break;
2117 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2118 break;
2119 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2120 break;
2121 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2122 break;
2123 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2124 break;
2125 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2126 break;
2127 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2128 break;
2129 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2130 break;
2131 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2132 break;
2133 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2134 break;
2135 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2136 break;
2137 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2138 break;
2139 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2140 break;
2141 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2142 break;
2143 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2144 break;
2145 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2146 break;
2147 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2148 break;
2149 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2150 break;
2151 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2152 break;
2153 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2154 break;
2155 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2156 break;
2157 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2158 break;
2159 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2160 break;
2161 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2162 break;
2163 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2164 break;
2165 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2166 break;
2167 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2168 break;
2169 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2170 break;
2171 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2172 break;
2173 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2174 break;
2175 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2176 break;
2177 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2178 break;
2179 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2180 break;
2181 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2182 break;
2183 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2184 break;
2185 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2186 break;
2187 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2188 break;
2189 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2190 break;
2191 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2192 break;
2193 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2194 break;
2195 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2196 break;
2197 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2198 break;
2199 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2200 break;
2201 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2202 break;
2203 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2204 break;
2205 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2206 break;
2207 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2208 break;
2209 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2210 break;
2211 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2212 break;
2213 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2214 break;
2215 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2216 break;
2217 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2218 break;
2219 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2220 break;
2221 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2222 break;
2223 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2224 break;
2225 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2226 break;
2227 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2228 break;
2229 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2230 break;
2231 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2232 break;
2233 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2234 break;
2235 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2236 break;
2237 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2238 break;
2239 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2240 break;
2241 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2242 break;
2243 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2244 break;
2245 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2246 break;
2247 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2248 break;
2249 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2250 break;
2251 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2252 break;
2253 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2254 break;
2255 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2256 break;
2257 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2258 break;
2259 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2260 break;
2261 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2262 break;
2263 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2266 break;
2267 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2268 break;
2269 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2270 break;
2271 }
2272
2273 return ppc64_elf_howto_table[r];
2274};
2275
2276static reloc_howto_type *
2277ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2278 const char *r_name)
2279{
2280 unsigned int i;
2281
2282 for (i = 0;
2283 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2284 i++)
2285 if (ppc64_elf_howto_raw[i].name != NULL
2286 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2287 return &ppc64_elf_howto_raw[i];
2288
2289 return NULL;
2290}
2291
2292/* Set the howto pointer for a PowerPC ELF reloc. */
2293
2294static void
2295ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2296 Elf_Internal_Rela *dst)
2297{
2298 unsigned int type;
2299
2300 /* Initialize howto table if needed. */
2301 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2302 ppc_howto_init ();
2303
2304 type = ELF64_R_TYPE (dst->r_info);
2305 if (type >= (sizeof (ppc64_elf_howto_table)
2306 / sizeof (ppc64_elf_howto_table[0])))
2307 {
2308 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2309 abfd, (int) type);
2310 type = R_PPC64_NONE;
2311 }
2312 cache_ptr->howto = ppc64_elf_howto_table[type];
2313}
2314
2315/* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2316
2317static bfd_reloc_status_type
2318ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2319 void *data, asection *input_section,
2320 bfd *output_bfd, char **error_message)
2321{
2322 /* If this is a relocatable link (output_bfd test tells us), just
2323 call the generic function. Any adjustment will be done at final
2324 link time. */
2325 if (output_bfd != NULL)
2326 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2327 input_section, output_bfd, error_message);
2328
2329 /* Adjust the addend for sign extension of the low 16 bits.
2330 We won't actually be using the low 16 bits, so trashing them
2331 doesn't matter. */
2332 reloc_entry->addend += 0x8000;
2333 return bfd_reloc_continue;
2334}
2335
2336static bfd_reloc_status_type
2337ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2338 void *data, asection *input_section,
2339 bfd *output_bfd, char **error_message)
2340{
2341 if (output_bfd != NULL)
2342 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2343 input_section, output_bfd, error_message);
2344
2345 if (strcmp (symbol->section->name, ".opd") == 0
2346 && (symbol->section->owner->flags & DYNAMIC) == 0)
2347 {
2348 bfd_vma dest = opd_entry_value (symbol->section,
2349 symbol->value + reloc_entry->addend,
2350 NULL, NULL, FALSE);
2351 if (dest != (bfd_vma) -1)
2352 reloc_entry->addend = dest - (symbol->value
2353 + symbol->section->output_section->vma
2354 + symbol->section->output_offset);
2355 }
2356 return bfd_reloc_continue;
2357}
2358
2359static bfd_reloc_status_type
2360ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2361 void *data, asection *input_section,
2362 bfd *output_bfd, char **error_message)
2363{
2364 long insn;
2365 enum elf_ppc64_reloc_type r_type;
2366 bfd_size_type octets;
2367 /* Assume 'at' branch hints. */
2368 bfd_boolean is_isa_v2 = TRUE;
2369
2370 /* If this is a relocatable link (output_bfd test tells us), just
2371 call the generic function. Any adjustment will be done at final
2372 link time. */
2373 if (output_bfd != NULL)
2374 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2375 input_section, output_bfd, error_message);
2376
2377 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2378 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2379 insn &= ~(0x01 << 21);
2380 r_type = reloc_entry->howto->type;
2381 if (r_type == R_PPC64_ADDR14_BRTAKEN
2382 || r_type == R_PPC64_REL14_BRTAKEN)
2383 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2384
2385 if (is_isa_v2)
2386 {
2387 /* Set 'a' bit. This is 0b00010 in BO field for branch
2388 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2389 for branch on CTR insns (BO == 1a00t or 1a01t). */
2390 if ((insn & (0x14 << 21)) == (0x04 << 21))
2391 insn |= 0x02 << 21;
2392 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2393 insn |= 0x08 << 21;
2394 else
2395 goto out;
2396 }
2397 else
2398 {
2399 bfd_vma target = 0;
2400 bfd_vma from;
2401
2402 if (!bfd_is_com_section (symbol->section))
2403 target = symbol->value;
2404 target += symbol->section->output_section->vma;
2405 target += symbol->section->output_offset;
2406 target += reloc_entry->addend;
2407
2408 from = (reloc_entry->address
2409 + input_section->output_offset
2410 + input_section->output_section->vma);
2411
2412 /* Invert 'y' bit if not the default. */
2413 if ((bfd_signed_vma) (target - from) < 0)
2414 insn ^= 0x01 << 21;
2415 }
2416 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2417 out:
2418 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2419 input_section, output_bfd, error_message);
2420}
2421
2422static bfd_reloc_status_type
2423ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2424 void *data, asection *input_section,
2425 bfd *output_bfd, char **error_message)
2426{
2427 /* If this is a relocatable link (output_bfd test tells us), just
2428 call the generic function. Any adjustment will be done at final
2429 link time. */
2430 if (output_bfd != NULL)
2431 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2432 input_section, output_bfd, error_message);
2433
2434 /* Subtract the symbol section base address. */
2435 reloc_entry->addend -= symbol->section->output_section->vma;
2436 return bfd_reloc_continue;
2437}
2438
2439static bfd_reloc_status_type
2440ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2441 void *data, asection *input_section,
2442 bfd *output_bfd, char **error_message)
2443{
2444 /* If this is a relocatable link (output_bfd test tells us), just
2445 call the generic function. Any adjustment will be done at final
2446 link time. */
2447 if (output_bfd != NULL)
2448 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2449 input_section, output_bfd, error_message);
2450
2451 /* Subtract the symbol section base address. */
2452 reloc_entry->addend -= symbol->section->output_section->vma;
2453
2454 /* Adjust the addend for sign extension of the low 16 bits. */
2455 reloc_entry->addend += 0x8000;
2456 return bfd_reloc_continue;
2457}
2458
2459static bfd_reloc_status_type
2460ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2461 void *data, asection *input_section,
2462 bfd *output_bfd, char **error_message)
2463{
2464 bfd_vma TOCstart;
2465
2466 /* If this is a relocatable link (output_bfd test tells us), just
2467 call the generic function. Any adjustment will be done at final
2468 link time. */
2469 if (output_bfd != NULL)
2470 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2471 input_section, output_bfd, error_message);
2472
2473 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2474 if (TOCstart == 0)
2475 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2476
2477 /* Subtract the TOC base address. */
2478 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2479 return bfd_reloc_continue;
2480}
2481
2482static bfd_reloc_status_type
2483ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2484 void *data, asection *input_section,
2485 bfd *output_bfd, char **error_message)
2486{
2487 bfd_vma TOCstart;
2488
2489 /* If this is a relocatable link (output_bfd test tells us), just
2490 call the generic function. Any adjustment will be done at final
2491 link time. */
2492 if (output_bfd != NULL)
2493 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2494 input_section, output_bfd, error_message);
2495
2496 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2497 if (TOCstart == 0)
2498 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2499
2500 /* Subtract the TOC base address. */
2501 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2502
2503 /* Adjust the addend for sign extension of the low 16 bits. */
2504 reloc_entry->addend += 0x8000;
2505 return bfd_reloc_continue;
2506}
2507
2508static bfd_reloc_status_type
2509ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2510 void *data, asection *input_section,
2511 bfd *output_bfd, char **error_message)
2512{
2513 bfd_vma TOCstart;
2514 bfd_size_type octets;
2515
2516 /* If this is a relocatable link (output_bfd test tells us), just
2517 call the generic function. Any adjustment will be done at final
2518 link time. */
2519 if (output_bfd != NULL)
2520 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2521 input_section, output_bfd, error_message);
2522
2523 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2524 if (TOCstart == 0)
2525 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2526
2527 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2528 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2529 return bfd_reloc_ok;
2530}
2531
2532static bfd_reloc_status_type
2533ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2534 void *data, asection *input_section,
2535 bfd *output_bfd, char **error_message)
2536{
2537 /* If this is a relocatable link (output_bfd test tells us), just
2538 call the generic function. Any adjustment will be done at final
2539 link time. */
2540 if (output_bfd != NULL)
2541 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2542 input_section, output_bfd, error_message);
2543
2544 if (error_message != NULL)
2545 {
2546 static char buf[60];
2547 sprintf (buf, "generic linker can't handle %s",
2548 reloc_entry->howto->name);
2549 *error_message = buf;
2550 }
2551 return bfd_reloc_dangerous;
2552}
2553
2554/* Track GOT entries needed for a given symbol. We might need more
2555 than one got entry per symbol. */
2556struct got_entry
2557{
2558 struct got_entry *next;
2559
2560 /* The symbol addend that we'll be placing in the GOT. */
2561 bfd_vma addend;
2562
2563 /* Unlike other ELF targets, we use separate GOT entries for the same
2564 symbol referenced from different input files. This is to support
2565 automatic multiple TOC/GOT sections, where the TOC base can vary
2566 from one input file to another. After partitioning into TOC groups
2567 we merge entries within the group.
2568
2569 Point to the BFD owning this GOT entry. */
2570 bfd *owner;
2571
2572 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2573 TLS_TPREL or TLS_DTPREL for tls entries. */
2574 unsigned char tls_type;
2575
2576 /* Non-zero if got.ent points to real entry. */
2577 unsigned char is_indirect;
2578
2579 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2580 union
2581 {
2582 bfd_signed_vma refcount;
2583 bfd_vma offset;
2584 struct got_entry *ent;
2585 } got;
2586};
2587
2588/* The same for PLT. */
2589struct plt_entry
2590{
2591 struct plt_entry *next;
2592
2593 bfd_vma addend;
2594
2595 union
2596 {
2597 bfd_signed_vma refcount;
2598 bfd_vma offset;
2599 } plt;
2600};
2601
2602struct ppc64_elf_obj_tdata
2603{
2604 struct elf_obj_tdata elf;
2605
2606 /* Shortcuts to dynamic linker sections. */
2607 asection *got;
2608 asection *relgot;
2609
2610 /* Used during garbage collection. We attach global symbols defined
2611 on removed .opd entries to this section so that the sym is removed. */
2612 asection *deleted_section;
2613
2614 /* TLS local dynamic got entry handling. Support for multiple GOT
2615 sections means we potentially need one of these for each input bfd. */
2616 struct got_entry tlsld_got;
2617
2618 /* A copy of relocs before they are modified for --emit-relocs. */
2619 Elf_Internal_Rela *opd_relocs;
2620
2621 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2622 the reloc to be in the range -32768 to 32767. */
2623 unsigned int has_small_toc_reloc : 1;
2624
2625 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2626 instruction not one we handle. */
2627 unsigned int unexpected_toc_insn : 1;
2628};
2629
2630#define ppc64_elf_tdata(bfd) \
2631 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2632
2633#define ppc64_tlsld_got(bfd) \
2634 (&ppc64_elf_tdata (bfd)->tlsld_got)
2635
2636#define is_ppc64_elf(bfd) \
2637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2638 && elf_object_id (bfd) == PPC64_ELF_DATA)
2639
2640/* Override the generic function because we store some extras. */
2641
2642static bfd_boolean
2643ppc64_elf_mkobject (bfd *abfd)
2644{
2645 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2646 PPC64_ELF_DATA);
2647}
2648
2649/* Fix bad default arch selected for a 64 bit input bfd when the
2650 default is 32 bit. */
2651
2652static bfd_boolean
2653ppc64_elf_object_p (bfd *abfd)
2654{
2655 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2656 {
2657 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2658
2659 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2660 {
2661 /* Relies on arch after 32 bit default being 64 bit default. */
2662 abfd->arch_info = abfd->arch_info->next;
2663 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2664 }
2665 }
2666 return TRUE;
2667}
2668
2669/* Support for core dump NOTE sections. */
2670
2671static bfd_boolean
2672ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2673{
2674 size_t offset, size;
2675
2676 if (note->descsz != 504)
2677 return FALSE;
2678
2679 /* pr_cursig */
2680 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2681
2682 /* pr_pid */
2683 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2684
2685 /* pr_reg */
2686 offset = 112;
2687 size = 384;
2688
2689 /* Make a ".reg/999" section. */
2690 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2691 size, note->descpos + offset);
2692}
2693
2694static bfd_boolean
2695ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2696{
2697 if (note->descsz != 136)
2698 return FALSE;
2699
2700 elf_tdata (abfd)->core->pid
2701 = bfd_get_32 (abfd, note->descdata + 24);
2702 elf_tdata (abfd)->core->program
2703 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2704 elf_tdata (abfd)->core->command
2705 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2706
2707 return TRUE;
2708}
2709
2710static char *
2711ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2712 ...)
2713{
2714 switch (note_type)
2715 {
2716 default:
2717 return NULL;
2718
2719 case NT_PRPSINFO:
2720 {
2721 char data[136];
2722 va_list ap;
2723
2724 va_start (ap, note_type);
2725 memset (data, 0, sizeof (data));
2726 strncpy (data + 40, va_arg (ap, const char *), 16);
2727 strncpy (data + 56, va_arg (ap, const char *), 80);
2728 va_end (ap);
2729 return elfcore_write_note (abfd, buf, bufsiz,
2730 "CORE", note_type, data, sizeof (data));
2731 }
2732
2733 case NT_PRSTATUS:
2734 {
2735 char data[504];
2736 va_list ap;
2737 long pid;
2738 int cursig;
2739 const void *greg;
2740
2741 va_start (ap, note_type);
2742 memset (data, 0, 112);
2743 pid = va_arg (ap, long);
2744 bfd_put_32 (abfd, pid, data + 32);
2745 cursig = va_arg (ap, int);
2746 bfd_put_16 (abfd, cursig, data + 12);
2747 greg = va_arg (ap, const void *);
2748 memcpy (data + 112, greg, 384);
2749 memset (data + 496, 0, 8);
2750 va_end (ap);
2751 return elfcore_write_note (abfd, buf, bufsiz,
2752 "CORE", note_type, data, sizeof (data));
2753 }
2754 }
2755}
2756
2757/* Add extra PPC sections. */
2758
2759static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2760{
2761 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2762 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2766 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2767 { NULL, 0, 0, 0, 0 }
2768};
2769
2770enum _ppc64_sec_type {
2771 sec_normal = 0,
2772 sec_opd = 1,
2773 sec_toc = 2
2774};
2775
2776struct _ppc64_elf_section_data
2777{
2778 struct bfd_elf_section_data elf;
2779
2780 union
2781 {
2782 /* An array with one entry for each opd function descriptor. */
2783 struct _opd_sec_data
2784 {
2785 /* Points to the function code section for local opd entries. */
2786 asection **func_sec;
2787
2788 /* After editing .opd, adjust references to opd local syms. */
2789 long *adjust;
2790 } opd;
2791
2792 /* An array for toc sections, indexed by offset/8. */
2793 struct _toc_sec_data
2794 {
2795 /* Specifies the relocation symbol index used at a given toc offset. */
2796 unsigned *symndx;
2797
2798 /* And the relocation addend. */
2799 bfd_vma *add;
2800 } toc;
2801 } u;
2802
2803 enum _ppc64_sec_type sec_type:2;
2804
2805 /* Flag set when small branches are detected. Used to
2806 select suitable defaults for the stub group size. */
2807 unsigned int has_14bit_branch:1;
2808};
2809
2810#define ppc64_elf_section_data(sec) \
2811 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2812
2813static bfd_boolean
2814ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2815{
2816 if (!sec->used_by_bfd)
2817 {
2818 struct _ppc64_elf_section_data *sdata;
2819 bfd_size_type amt = sizeof (*sdata);
2820
2821 sdata = bfd_zalloc (abfd, amt);
2822 if (sdata == NULL)
2823 return FALSE;
2824 sec->used_by_bfd = sdata;
2825 }
2826
2827 return _bfd_elf_new_section_hook (abfd, sec);
2828}
2829
2830static struct _opd_sec_data *
2831get_opd_info (asection * sec)
2832{
2833 if (sec != NULL
2834 && ppc64_elf_section_data (sec) != NULL
2835 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2836 return &ppc64_elf_section_data (sec)->u.opd;
2837 return NULL;
2838}
2839\f
2840/* Parameters for the qsort hook. */
2841static bfd_boolean synthetic_relocatable;
2842
2843/* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2844
2845static int
2846compare_symbols (const void *ap, const void *bp)
2847{
2848 const asymbol *a = * (const asymbol **) ap;
2849 const asymbol *b = * (const asymbol **) bp;
2850
2851 /* Section symbols first. */
2852 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2853 return -1;
2854 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2855 return 1;
2856
2857 /* then .opd symbols. */
2858 if (strcmp (a->section->name, ".opd") == 0
2859 && strcmp (b->section->name, ".opd") != 0)
2860 return -1;
2861 if (strcmp (a->section->name, ".opd") != 0
2862 && strcmp (b->section->name, ".opd") == 0)
2863 return 1;
2864
2865 /* then other code symbols. */
2866 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 == (SEC_CODE | SEC_ALLOC)
2868 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 != (SEC_CODE | SEC_ALLOC))
2870 return -1;
2871
2872 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 != (SEC_CODE | SEC_ALLOC)
2874 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2875 == (SEC_CODE | SEC_ALLOC))
2876 return 1;
2877
2878 if (synthetic_relocatable)
2879 {
2880 if (a->section->id < b->section->id)
2881 return -1;
2882
2883 if (a->section->id > b->section->id)
2884 return 1;
2885 }
2886
2887 if (a->value + a->section->vma < b->value + b->section->vma)
2888 return -1;
2889
2890 if (a->value + a->section->vma > b->value + b->section->vma)
2891 return 1;
2892
2893 /* For syms with the same value, prefer strong dynamic global function
2894 syms over other syms. */
2895 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2896 return -1;
2897
2898 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2899 return 1;
2900
2901 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2902 return -1;
2903
2904 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2905 return 1;
2906
2907 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2908 return -1;
2909
2910 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2911 return 1;
2912
2913 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2914 return -1;
2915
2916 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2917 return 1;
2918
2919 return 0;
2920}
2921
2922/* Search SYMS for a symbol of the given VALUE. */
2923
2924static asymbol *
2925sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2926{
2927 long mid;
2928
2929 if (id == -1)
2930 {
2931 while (lo < hi)
2932 {
2933 mid = (lo + hi) >> 1;
2934 if (syms[mid]->value + syms[mid]->section->vma < value)
2935 lo = mid + 1;
2936 else if (syms[mid]->value + syms[mid]->section->vma > value)
2937 hi = mid;
2938 else
2939 return syms[mid];
2940 }
2941 }
2942 else
2943 {
2944 while (lo < hi)
2945 {
2946 mid = (lo + hi) >> 1;
2947 if (syms[mid]->section->id < id)
2948 lo = mid + 1;
2949 else if (syms[mid]->section->id > id)
2950 hi = mid;
2951 else if (syms[mid]->value < value)
2952 lo = mid + 1;
2953 else if (syms[mid]->value > value)
2954 hi = mid;
2955 else
2956 return syms[mid];
2957 }
2958 }
2959 return NULL;
2960}
2961
2962static bfd_boolean
2963section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2964{
2965 bfd_vma vma = *(bfd_vma *) ptr;
2966 return ((section->flags & SEC_ALLOC) != 0
2967 && section->vma <= vma
2968 && vma < section->vma + section->size);
2969}
2970
2971/* Create synthetic symbols, effectively restoring "dot-symbol" function
2972 entry syms. Also generate @plt symbols for the glink branch table. */
2973
2974static long
2975ppc64_elf_get_synthetic_symtab (bfd *abfd,
2976 long static_count, asymbol **static_syms,
2977 long dyn_count, asymbol **dyn_syms,
2978 asymbol **ret)
2979{
2980 asymbol *s;
2981 long i;
2982 long count;
2983 char *names;
2984 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2985 asection *opd;
2986 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2987 asymbol **syms;
2988
2989 *ret = NULL;
2990
2991 opd = bfd_get_section_by_name (abfd, ".opd");
2992 if (opd == NULL)
2993 return 0;
2994
2995 symcount = static_count;
2996 if (!relocatable)
2997 symcount += dyn_count;
2998 if (symcount == 0)
2999 return 0;
3000
3001 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3002 if (syms == NULL)
3003 return -1;
3004
3005 if (!relocatable && static_count != 0 && dyn_count != 0)
3006 {
3007 /* Use both symbol tables. */
3008 memcpy (syms, static_syms, static_count * sizeof (*syms));
3009 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3010 }
3011 else if (!relocatable && static_count == 0)
3012 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3013 else
3014 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3015
3016 synthetic_relocatable = relocatable;
3017 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3018
3019 if (!relocatable && symcount > 1)
3020 {
3021 long j;
3022 /* Trim duplicate syms, since we may have merged the normal and
3023 dynamic symbols. Actually, we only care about syms that have
3024 different values, so trim any with the same value. */
3025 for (i = 1, j = 1; i < symcount; ++i)
3026 if (syms[i - 1]->value + syms[i - 1]->section->vma
3027 != syms[i]->value + syms[i]->section->vma)
3028 syms[j++] = syms[i];
3029 symcount = j;
3030 }
3031
3032 i = 0;
3033 if (strcmp (syms[i]->section->name, ".opd") == 0)
3034 ++i;
3035 codesecsym = i;
3036
3037 for (; i < symcount; ++i)
3038 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3039 != (SEC_CODE | SEC_ALLOC))
3040 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3041 break;
3042 codesecsymend = i;
3043
3044 for (; i < symcount; ++i)
3045 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3046 break;
3047 secsymend = i;
3048
3049 for (; i < symcount; ++i)
3050 if (strcmp (syms[i]->section->name, ".opd") != 0)
3051 break;
3052 opdsymend = i;
3053
3054 for (; i < symcount; ++i)
3055 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3056 != (SEC_CODE | SEC_ALLOC))
3057 break;
3058 symcount = i;
3059
3060 count = 0;
3061
3062 if (relocatable)
3063 {
3064 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3065 arelent *r;
3066 size_t size;
3067 long relcount;
3068
3069 if (opdsymend == secsymend)
3070 goto done;
3071
3072 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3073 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3074 if (relcount == 0)
3075 goto done;
3076
3077 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3078 {
3079 count = -1;
3080 goto done;
3081 }
3082
3083 size = 0;
3084 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3085 {
3086 asymbol *sym;
3087
3088 while (r < opd->relocation + relcount
3089 && r->address < syms[i]->value + opd->vma)
3090 ++r;
3091
3092 if (r == opd->relocation + relcount)
3093 break;
3094
3095 if (r->address != syms[i]->value + opd->vma)
3096 continue;
3097
3098 if (r->howto->type != R_PPC64_ADDR64)
3099 continue;
3100
3101 sym = *r->sym_ptr_ptr;
3102 if (!sym_exists_at (syms, opdsymend, symcount,
3103 sym->section->id, sym->value + r->addend))
3104 {
3105 ++count;
3106 size += sizeof (asymbol);
3107 size += strlen (syms[i]->name) + 2;
3108 }
3109 }
3110
3111 s = *ret = bfd_malloc (size);
3112 if (s == NULL)
3113 {
3114 count = -1;
3115 goto done;
3116 }
3117
3118 names = (char *) (s + count);
3119
3120 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3121 {
3122 asymbol *sym;
3123
3124 while (r < opd->relocation + relcount
3125 && r->address < syms[i]->value + opd->vma)
3126 ++r;
3127
3128 if (r == opd->relocation + relcount)
3129 break;
3130
3131 if (r->address != syms[i]->value + opd->vma)
3132 continue;
3133
3134 if (r->howto->type != R_PPC64_ADDR64)
3135 continue;
3136
3137 sym = *r->sym_ptr_ptr;
3138 if (!sym_exists_at (syms, opdsymend, symcount,
3139 sym->section->id, sym->value + r->addend))
3140 {
3141 size_t len;
3142
3143 *s = *syms[i];
3144 s->flags |= BSF_SYNTHETIC;
3145 s->section = sym->section;
3146 s->value = sym->value + r->addend;
3147 s->name = names;
3148 *names++ = '.';
3149 len = strlen (syms[i]->name);
3150 memcpy (names, syms[i]->name, len + 1);
3151 names += len + 1;
3152 /* Have udata.p point back to the original symbol this
3153 synthetic symbol was derived from. */
3154 s->udata.p = syms[i];
3155 s++;
3156 }
3157 }
3158 }
3159 else
3160 {
3161 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3162 bfd_byte *contents;
3163 size_t size;
3164 long plt_count = 0;
3165 bfd_vma glink_vma = 0, resolv_vma = 0;
3166 asection *dynamic, *glink = NULL, *relplt = NULL;
3167 arelent *p;
3168
3169 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3170 {
3171 if (contents)
3172 {
3173 free_contents_and_exit:
3174 free (contents);
3175 }
3176 count = -1;
3177 goto done;
3178 }
3179
3180 size = 0;
3181 for (i = secsymend; i < opdsymend; ++i)
3182 {
3183 bfd_vma ent;
3184
3185 /* Ignore bogus symbols. */
3186 if (syms[i]->value > opd->size - 8)
3187 continue;
3188
3189 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3190 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3191 {
3192 ++count;
3193 size += sizeof (asymbol);
3194 size += strlen (syms[i]->name) + 2;
3195 }
3196 }
3197
3198 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3199 if (dyn_count != 0
3200 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3201 {
3202 bfd_byte *dynbuf, *extdyn, *extdynend;
3203 size_t extdynsize;
3204 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3205
3206 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3207 goto free_contents_and_exit;
3208
3209 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3210 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3211
3212 extdyn = dynbuf;
3213 extdynend = extdyn + dynamic->size;
3214 for (; extdyn < extdynend; extdyn += extdynsize)
3215 {
3216 Elf_Internal_Dyn dyn;
3217 (*swap_dyn_in) (abfd, extdyn, &dyn);
3218
3219 if (dyn.d_tag == DT_NULL)
3220 break;
3221
3222 if (dyn.d_tag == DT_PPC64_GLINK)
3223 {
3224 /* The first glink stub starts at offset 32; see comment in
3225 ppc64_elf_finish_dynamic_sections. */
3226 glink_vma = dyn.d_un.d_val + 32;
3227 /* The .glink section usually does not survive the final
3228 link; search for the section (usually .text) where the
3229 glink stubs now reside. */
3230 glink = bfd_sections_find_if (abfd, section_covers_vma,
3231 &glink_vma);
3232 break;
3233 }
3234 }
3235
3236 free (dynbuf);
3237 }
3238
3239 if (glink != NULL)
3240 {
3241 /* Determine __glink trampoline by reading the relative branch
3242 from the first glink stub. */
3243 bfd_byte buf[4];
3244 if (bfd_get_section_contents (abfd, glink, buf,
3245 glink_vma + 4 - glink->vma, 4))
3246 {
3247 unsigned int insn = bfd_get_32 (abfd, buf);
3248 insn ^= B_DOT;
3249 if ((insn & ~0x3fffffc) == 0)
3250 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3251 }
3252
3253 if (resolv_vma)
3254 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3255
3256 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3257 if (relplt != NULL)
3258 {
3259 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3260 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3261 goto free_contents_and_exit;
3262
3263 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3264 size += plt_count * sizeof (asymbol);
3265
3266 p = relplt->relocation;
3267 for (i = 0; i < plt_count; i++, p++)
3268 {
3269 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3270 if (p->addend != 0)
3271 size += sizeof ("+0x") - 1 + 16;
3272 }
3273 }
3274 }
3275
3276 s = *ret = bfd_malloc (size);
3277 if (s == NULL)
3278 goto free_contents_and_exit;
3279
3280 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3281
3282 for (i = secsymend; i < opdsymend; ++i)
3283 {
3284 bfd_vma ent;
3285
3286 if (syms[i]->value > opd->size - 8)
3287 continue;
3288
3289 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3290 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3291 {
3292 long lo, hi;
3293 size_t len;
3294 asection *sec = abfd->sections;
3295
3296 *s = *syms[i];
3297 lo = codesecsym;
3298 hi = codesecsymend;
3299 while (lo < hi)
3300 {
3301 long mid = (lo + hi) >> 1;
3302 if (syms[mid]->section->vma < ent)
3303 lo = mid + 1;
3304 else if (syms[mid]->section->vma > ent)
3305 hi = mid;
3306 else
3307 {
3308 sec = syms[mid]->section;
3309 break;
3310 }
3311 }
3312
3313 if (lo >= hi && lo > codesecsym)
3314 sec = syms[lo - 1]->section;
3315
3316 for (; sec != NULL; sec = sec->next)
3317 {
3318 if (sec->vma > ent)
3319 break;
3320 /* SEC_LOAD may not be set if SEC is from a separate debug
3321 info file. */
3322 if ((sec->flags & SEC_ALLOC) == 0)
3323 break;
3324 if ((sec->flags & SEC_CODE) != 0)
3325 s->section = sec;
3326 }
3327 s->flags |= BSF_SYNTHETIC;
3328 s->value = ent - s->section->vma;
3329 s->name = names;
3330 *names++ = '.';
3331 len = strlen (syms[i]->name);
3332 memcpy (names, syms[i]->name, len + 1);
3333 names += len + 1;
3334 /* Have udata.p point back to the original symbol this
3335 synthetic symbol was derived from. */
3336 s->udata.p = syms[i];
3337 s++;
3338 }
3339 }
3340 free (contents);
3341
3342 if (glink != NULL && relplt != NULL)
3343 {
3344 if (resolv_vma)
3345 {
3346 /* Add a symbol for the main glink trampoline. */
3347 memset (s, 0, sizeof *s);
3348 s->the_bfd = abfd;
3349 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3350 s->section = glink;
3351 s->value = resolv_vma - glink->vma;
3352 s->name = names;
3353 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3354 names += sizeof ("__glink_PLTresolve");
3355 s++;
3356 count++;
3357 }
3358
3359 /* FIXME: It would be very much nicer to put sym@plt on the
3360 stub rather than on the glink branch table entry. The
3361 objdump disassembler would then use a sensible symbol
3362 name on plt calls. The difficulty in doing so is
3363 a) finding the stubs, and,
3364 b) matching stubs against plt entries, and,
3365 c) there can be multiple stubs for a given plt entry.
3366
3367 Solving (a) could be done by code scanning, but older
3368 ppc64 binaries used different stubs to current code.
3369 (b) is the tricky one since you need to known the toc
3370 pointer for at least one function that uses a pic stub to
3371 be able to calculate the plt address referenced.
3372 (c) means gdb would need to set multiple breakpoints (or
3373 find the glink branch itself) when setting breakpoints
3374 for pending shared library loads. */
3375 p = relplt->relocation;
3376 for (i = 0; i < plt_count; i++, p++)
3377 {
3378 size_t len;
3379
3380 *s = **p->sym_ptr_ptr;
3381 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3382 we are defining a symbol, ensure one of them is set. */
3383 if ((s->flags & BSF_LOCAL) == 0)
3384 s->flags |= BSF_GLOBAL;
3385 s->flags |= BSF_SYNTHETIC;
3386 s->section = glink;
3387 s->value = glink_vma - glink->vma;
3388 s->name = names;
3389 s->udata.p = NULL;
3390 len = strlen ((*p->sym_ptr_ptr)->name);
3391 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3392 names += len;
3393 if (p->addend != 0)
3394 {
3395 memcpy (names, "+0x", sizeof ("+0x") - 1);
3396 names += sizeof ("+0x") - 1;
3397 bfd_sprintf_vma (abfd, names, p->addend);
3398 names += strlen (names);
3399 }
3400 memcpy (names, "@plt", sizeof ("@plt"));
3401 names += sizeof ("@plt");
3402 s++;
3403 glink_vma += 8;
3404 if (i >= 0x8000)
3405 glink_vma += 4;
3406 }
3407 count += plt_count;
3408 }
3409 }
3410
3411 done:
3412 free (syms);
3413 return count;
3414}
3415\f
3416/* The following functions are specific to the ELF linker, while
3417 functions above are used generally. Those named ppc64_elf_* are
3418 called by the main ELF linker code. They appear in this file more
3419 or less in the order in which they are called. eg.
3420 ppc64_elf_check_relocs is called early in the link process,
3421 ppc64_elf_finish_dynamic_sections is one of the last functions
3422 called.
3423
3424 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3425 functions have both a function code symbol and a function descriptor
3426 symbol. A call to foo in a relocatable object file looks like:
3427
3428 . .text
3429 . x:
3430 . bl .foo
3431 . nop
3432
3433 The function definition in another object file might be:
3434
3435 . .section .opd
3436 . foo: .quad .foo
3437 . .quad .TOC.@tocbase
3438 . .quad 0
3439 .
3440 . .text
3441 . .foo: blr
3442
3443 When the linker resolves the call during a static link, the branch
3444 unsurprisingly just goes to .foo and the .opd information is unused.
3445 If the function definition is in a shared library, things are a little
3446 different: The call goes via a plt call stub, the opd information gets
3447 copied to the plt, and the linker patches the nop.
3448
3449 . x:
3450 . bl .foo_stub
3451 . ld 2,40(1)
3452 .
3453 .
3454 . .foo_stub:
3455 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3456 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3457 . std 2,40(1) # this is the general idea
3458 . ld 11,0(12)
3459 . ld 2,8(12)
3460 . mtctr 11
3461 . ld 11,16(12)
3462 . bctr
3463 .
3464 . .section .plt
3465 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3466
3467 The "reloc ()" notation is supposed to indicate that the linker emits
3468 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3469 copying.
3470
3471 What are the difficulties here? Well, firstly, the relocations
3472 examined by the linker in check_relocs are against the function code
3473 sym .foo, while the dynamic relocation in the plt is emitted against
3474 the function descriptor symbol, foo. Somewhere along the line, we need
3475 to carefully copy dynamic link information from one symbol to the other.
3476 Secondly, the generic part of the elf linker will make .foo a dynamic
3477 symbol as is normal for most other backends. We need foo dynamic
3478 instead, at least for an application final link. However, when
3479 creating a shared library containing foo, we need to have both symbols
3480 dynamic so that references to .foo are satisfied during the early
3481 stages of linking. Otherwise the linker might decide to pull in a
3482 definition from some other object, eg. a static library.
3483
3484 Update: As of August 2004, we support a new convention. Function
3485 calls may use the function descriptor symbol, ie. "bl foo". This
3486 behaves exactly as "bl .foo". */
3487
3488/* Of those relocs that might be copied as dynamic relocs, this function
3489 selects those that must be copied when linking a shared library,
3490 even when the symbol is local. */
3491
3492static int
3493must_be_dyn_reloc (struct bfd_link_info *info,
3494 enum elf_ppc64_reloc_type r_type)
3495{
3496 switch (r_type)
3497 {
3498 default:
3499 return 1;
3500
3501 case R_PPC64_REL32:
3502 case R_PPC64_REL64:
3503 case R_PPC64_REL30:
3504 return 0;
3505
3506 case R_PPC64_TPREL16:
3507 case R_PPC64_TPREL16_LO:
3508 case R_PPC64_TPREL16_HI:
3509 case R_PPC64_TPREL16_HA:
3510 case R_PPC64_TPREL16_DS:
3511 case R_PPC64_TPREL16_LO_DS:
3512 case R_PPC64_TPREL16_HIGHER:
3513 case R_PPC64_TPREL16_HIGHERA:
3514 case R_PPC64_TPREL16_HIGHEST:
3515 case R_PPC64_TPREL16_HIGHESTA:
3516 case R_PPC64_TPREL64:
3517 return !info->executable;
3518 }
3519}
3520
3521/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3522 copying dynamic variables from a shared lib into an app's dynbss
3523 section, and instead use a dynamic relocation to point into the
3524 shared lib. With code that gcc generates, it's vital that this be
3525 enabled; In the PowerPC64 ABI, the address of a function is actually
3526 the address of a function descriptor, which resides in the .opd
3527 section. gcc uses the descriptor directly rather than going via the
3528 GOT as some other ABI's do, which means that initialized function
3529 pointers must reference the descriptor. Thus, a function pointer
3530 initialized to the address of a function in a shared library will
3531 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3532 redefines the function descriptor symbol to point to the copy. This
3533 presents a problem as a plt entry for that function is also
3534 initialized from the function descriptor symbol and the copy reloc
3535 may not be initialized first. */
3536#define ELIMINATE_COPY_RELOCS 1
3537
3538/* Section name for stubs is the associated section name plus this
3539 string. */
3540#define STUB_SUFFIX ".stub"
3541
3542/* Linker stubs.
3543 ppc_stub_long_branch:
3544 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3545 destination, but a 24 bit branch in a stub section will reach.
3546 . b dest
3547
3548 ppc_stub_plt_branch:
3549 Similar to the above, but a 24 bit branch in the stub section won't
3550 reach its destination.
3551 . addis %r12,%r2,xxx@toc@ha
3552 . ld %r11,xxx@toc@l(%r12)
3553 . mtctr %r11
3554 . bctr
3555
3556 ppc_stub_plt_call:
3557 Used to call a function in a shared library. If it so happens that
3558 the plt entry referenced crosses a 64k boundary, then an extra
3559 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3560 . addis %r12,%r2,xxx@toc@ha
3561 . std %r2,40(%r1)
3562 . ld %r11,xxx+0@toc@l(%r12)
3563 . mtctr %r11
3564 . ld %r2,xxx+8@toc@l(%r12)
3565 . ld %r11,xxx+16@toc@l(%r12)
3566 . bctr
3567
3568 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3569 code to adjust the value and save r2 to support multiple toc sections.
3570 A ppc_stub_long_branch with an r2 offset looks like:
3571 . std %r2,40(%r1)
3572 . addis %r2,%r2,off@ha
3573 . addi %r2,%r2,off@l
3574 . b dest
3575
3576 A ppc_stub_plt_branch with an r2 offset looks like:
3577 . std %r2,40(%r1)
3578 . addis %r12,%r2,xxx@toc@ha
3579 . ld %r11,xxx@toc@l(%r12)
3580 . addis %r2,%r2,off@ha
3581 . addi %r2,%r2,off@l
3582 . mtctr %r11
3583 . bctr
3584
3585 In cases where the "addis" instruction would add zero, the "addis" is
3586 omitted and following instructions modified slightly in some cases.
3587*/
3588
3589enum ppc_stub_type {
3590 ppc_stub_none,
3591 ppc_stub_long_branch,
3592 ppc_stub_long_branch_r2off,
3593 ppc_stub_plt_branch,
3594 ppc_stub_plt_branch_r2off,
3595 ppc_stub_plt_call,
3596 ppc_stub_plt_call_r2save
3597};
3598
3599struct ppc_stub_hash_entry {
3600
3601 /* Base hash table entry structure. */
3602 struct bfd_hash_entry root;
3603
3604 enum ppc_stub_type stub_type;
3605
3606 /* The stub section. */
3607 asection *stub_sec;
3608
3609 /* Offset within stub_sec of the beginning of this stub. */
3610 bfd_vma stub_offset;
3611
3612 /* Given the symbol's value and its section we can determine its final
3613 value when building the stubs (so the stub knows where to jump. */
3614 bfd_vma target_value;
3615 asection *target_section;
3616
3617 /* The symbol table entry, if any, that this was derived from. */
3618 struct ppc_link_hash_entry *h;
3619 struct plt_entry *plt_ent;
3620
3621 /* And the reloc addend that this was derived from. */
3622 bfd_vma addend;
3623
3624 /* Where this stub is being called from, or, in the case of combined
3625 stub sections, the first input section in the group. */
3626 asection *id_sec;
3627};
3628
3629struct ppc_branch_hash_entry {
3630
3631 /* Base hash table entry structure. */
3632 struct bfd_hash_entry root;
3633
3634 /* Offset within branch lookup table. */
3635 unsigned int offset;
3636
3637 /* Generation marker. */
3638 unsigned int iter;
3639};
3640
3641/* Used to track dynamic relocations for local symbols. */
3642struct ppc_dyn_relocs
3643{
3644 struct ppc_dyn_relocs *next;
3645
3646 /* The input section of the reloc. */
3647 asection *sec;
3648
3649 /* Total number of relocs copied for the input section. */
3650 unsigned int count : 31;
3651
3652 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3653 unsigned int ifunc : 1;
3654};
3655
3656struct ppc_link_hash_entry
3657{
3658 struct elf_link_hash_entry elf;
3659
3660 union {
3661 /* A pointer to the most recently used stub hash entry against this
3662 symbol. */
3663 struct ppc_stub_hash_entry *stub_cache;
3664
3665 /* A pointer to the next symbol starting with a '.' */
3666 struct ppc_link_hash_entry *next_dot_sym;
3667 } u;
3668
3669 /* Track dynamic relocs copied for this symbol. */
3670 struct elf_dyn_relocs *dyn_relocs;
3671
3672 /* Link between function code and descriptor symbols. */
3673 struct ppc_link_hash_entry *oh;
3674
3675 /* Flag function code and descriptor symbols. */
3676 unsigned int is_func:1;
3677 unsigned int is_func_descriptor:1;
3678 unsigned int fake:1;
3679
3680 /* Whether global opd/toc sym has been adjusted or not.
3681 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3682 should be set for all globals defined in any opd/toc section. */
3683 unsigned int adjust_done:1;
3684
3685 /* Set if we twiddled this symbol to weak at some stage. */
3686 unsigned int was_undefined:1;
3687
3688 /* Contexts in which symbol is used in the GOT (or TOC).
3689 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3690 corresponding relocs are encountered during check_relocs.
3691 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3692 indicate the corresponding GOT entry type is not needed.
3693 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3694 a TPREL one. We use a separate flag rather than setting TPREL
3695 just for convenience in distinguishing the two cases. */
3696#define TLS_GD 1 /* GD reloc. */
3697#define TLS_LD 2 /* LD reloc. */
3698#define TLS_TPREL 4 /* TPREL reloc, => IE. */
3699#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3700#define TLS_TLS 16 /* Any TLS reloc. */
3701#define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3702#define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3703#define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3704 unsigned char tls_mask;
3705};
3706
3707/* ppc64 ELF linker hash table. */
3708
3709struct ppc_link_hash_table
3710{
3711 struct elf_link_hash_table elf;
3712
3713 /* The stub hash table. */
3714 struct bfd_hash_table stub_hash_table;
3715
3716 /* Another hash table for plt_branch stubs. */
3717 struct bfd_hash_table branch_hash_table;
3718
3719 /* Hash table for function prologue tocsave. */
3720 htab_t tocsave_htab;
3721
3722 /* Linker stub bfd. */
3723 bfd *stub_bfd;
3724
3725 /* Linker call-backs. */
3726 asection * (*add_stub_section) (const char *, asection *);
3727 void (*layout_sections_again) (void);
3728
3729 /* Array to keep track of which stub sections have been created, and
3730 information on stub grouping. */
3731 struct map_stub {
3732 /* This is the section to which stubs in the group will be attached. */
3733 asection *link_sec;
3734 /* The stub section. */
3735 asection *stub_sec;
3736 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3737 bfd_vma toc_off;
3738 } *stub_group;
3739
3740 /* Temp used when calculating TOC pointers. */
3741 bfd_vma toc_curr;
3742 bfd *toc_bfd;
3743 asection *toc_first_sec;
3744
3745 /* Highest input section id. */
3746 int top_id;
3747
3748 /* Highest output section index. */
3749 int top_index;
3750
3751 /* Used when adding symbols. */
3752 struct ppc_link_hash_entry *dot_syms;
3753
3754 /* List of input sections for each output section. */
3755 asection **input_list;
3756
3757 /* Short-cuts to get to dynamic linker sections. */
3758 asection *got;
3759 asection *plt;
3760 asection *relplt;
3761 asection *iplt;
3762 asection *reliplt;
3763 asection *dynbss;
3764 asection *relbss;
3765 asection *glink;
3766 asection *sfpr;
3767 asection *brlt;
3768 asection *relbrlt;
3769 asection *glink_eh_frame;
3770
3771 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3772 struct ppc_link_hash_entry *tls_get_addr;
3773 struct ppc_link_hash_entry *tls_get_addr_fd;
3774
3775 /* The size of reliplt used by got entry relocs. */
3776 bfd_size_type got_reli_size;
3777
3778 /* Statistics. */
3779 unsigned long stub_count[ppc_stub_plt_call_r2save];
3780
3781 /* Number of stubs against global syms. */
3782 unsigned long stub_globals;
3783
3784 /* Alignment of PLT call stubs. */
3785 unsigned int plt_stub_align:4;
3786
3787 /* Set if PLT call stubs should load r11. */
3788 unsigned int plt_static_chain:1;
3789
3790 /* Set if PLT call stubs need a read-read barrier. */
3791 unsigned int plt_thread_safe:1;
3792
3793 /* Set if we should emit symbols for stubs. */
3794 unsigned int emit_stub_syms:1;
3795
3796 /* Set if __tls_get_addr optimization should not be done. */
3797 unsigned int no_tls_get_addr_opt:1;
3798
3799 /* Support for multiple toc sections. */
3800 unsigned int do_multi_toc:1;
3801 unsigned int multi_toc_needed:1;
3802 unsigned int second_toc_pass:1;
3803 unsigned int do_toc_opt:1;
3804
3805 /* Set on error. */
3806 unsigned int stub_error:1;
3807
3808 /* Temp used by ppc64_elf_process_dot_syms. */
3809 unsigned int twiddled_syms:1;
3810
3811 /* Incremented every time we size stubs. */
3812 unsigned int stub_iteration;
3813
3814 /* Small local sym cache. */
3815 struct sym_cache sym_cache;
3816};
3817
3818/* Rename some of the generic section flags to better document how they
3819 are used here. */
3820
3821/* Nonzero if this section has TLS related relocations. */
3822#define has_tls_reloc sec_flg0
3823
3824/* Nonzero if this section has a call to __tls_get_addr. */
3825#define has_tls_get_addr_call sec_flg1
3826
3827/* Nonzero if this section has any toc or got relocs. */
3828#define has_toc_reloc sec_flg2
3829
3830/* Nonzero if this section has a call to another section that uses
3831 the toc or got. */
3832#define makes_toc_func_call sec_flg3
3833
3834/* Recursion protection when determining above flag. */
3835#define call_check_in_progress sec_flg4
3836#define call_check_done sec_flg5
3837
3838/* Get the ppc64 ELF linker hash table from a link_info structure. */
3839
3840#define ppc_hash_table(p) \
3841 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3842 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3843
3844#define ppc_stub_hash_lookup(table, string, create, copy) \
3845 ((struct ppc_stub_hash_entry *) \
3846 bfd_hash_lookup ((table), (string), (create), (copy)))
3847
3848#define ppc_branch_hash_lookup(table, string, create, copy) \
3849 ((struct ppc_branch_hash_entry *) \
3850 bfd_hash_lookup ((table), (string), (create), (copy)))
3851
3852/* Create an entry in the stub hash table. */
3853
3854static struct bfd_hash_entry *
3855stub_hash_newfunc (struct bfd_hash_entry *entry,
3856 struct bfd_hash_table *table,
3857 const char *string)
3858{
3859 /* Allocate the structure if it has not already been allocated by a
3860 subclass. */
3861 if (entry == NULL)
3862 {
3863 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3864 if (entry == NULL)
3865 return entry;
3866 }
3867
3868 /* Call the allocation method of the superclass. */
3869 entry = bfd_hash_newfunc (entry, table, string);
3870 if (entry != NULL)
3871 {
3872 struct ppc_stub_hash_entry *eh;
3873
3874 /* Initialize the local fields. */
3875 eh = (struct ppc_stub_hash_entry *) entry;
3876 eh->stub_type = ppc_stub_none;
3877 eh->stub_sec = NULL;
3878 eh->stub_offset = 0;
3879 eh->target_value = 0;
3880 eh->target_section = NULL;
3881 eh->h = NULL;
3882 eh->id_sec = NULL;
3883 }
3884
3885 return entry;
3886}
3887
3888/* Create an entry in the branch hash table. */
3889
3890static struct bfd_hash_entry *
3891branch_hash_newfunc (struct bfd_hash_entry *entry,
3892 struct bfd_hash_table *table,
3893 const char *string)
3894{
3895 /* Allocate the structure if it has not already been allocated by a
3896 subclass. */
3897 if (entry == NULL)
3898 {
3899 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3900 if (entry == NULL)
3901 return entry;
3902 }
3903
3904 /* Call the allocation method of the superclass. */
3905 entry = bfd_hash_newfunc (entry, table, string);
3906 if (entry != NULL)
3907 {
3908 struct ppc_branch_hash_entry *eh;
3909
3910 /* Initialize the local fields. */
3911 eh = (struct ppc_branch_hash_entry *) entry;
3912 eh->offset = 0;
3913 eh->iter = 0;
3914 }
3915
3916 return entry;
3917}
3918
3919/* Create an entry in a ppc64 ELF linker hash table. */
3920
3921static struct bfd_hash_entry *
3922link_hash_newfunc (struct bfd_hash_entry *entry,
3923 struct bfd_hash_table *table,
3924 const char *string)
3925{
3926 /* Allocate the structure if it has not already been allocated by a
3927 subclass. */
3928 if (entry == NULL)
3929 {
3930 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3931 if (entry == NULL)
3932 return entry;
3933 }
3934
3935 /* Call the allocation method of the superclass. */
3936 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3937 if (entry != NULL)
3938 {
3939 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3940
3941 memset (&eh->u.stub_cache, 0,
3942 (sizeof (struct ppc_link_hash_entry)
3943 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3944
3945 /* When making function calls, old ABI code references function entry
3946 points (dot symbols), while new ABI code references the function
3947 descriptor symbol. We need to make any combination of reference and
3948 definition work together, without breaking archive linking.
3949
3950 For a defined function "foo" and an undefined call to "bar":
3951 An old object defines "foo" and ".foo", references ".bar" (possibly
3952 "bar" too).
3953 A new object defines "foo" and references "bar".
3954
3955 A new object thus has no problem with its undefined symbols being
3956 satisfied by definitions in an old object. On the other hand, the
3957 old object won't have ".bar" satisfied by a new object.
3958
3959 Keep a list of newly added dot-symbols. */
3960
3961 if (string[0] == '.')
3962 {
3963 struct ppc_link_hash_table *htab;
3964
3965 htab = (struct ppc_link_hash_table *) table;
3966 eh->u.next_dot_sym = htab->dot_syms;
3967 htab->dot_syms = eh;
3968 }
3969 }
3970
3971 return entry;
3972}
3973
3974struct tocsave_entry {
3975 asection *sec;
3976 bfd_vma offset;
3977};
3978
3979static hashval_t
3980tocsave_htab_hash (const void *p)
3981{
3982 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3983 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
3984}
3985
3986static int
3987tocsave_htab_eq (const void *p1, const void *p2)
3988{
3989 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3990 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3991 return e1->sec == e2->sec && e1->offset == e2->offset;
3992}
3993
3994/* Create a ppc64 ELF linker hash table. */
3995
3996static struct bfd_link_hash_table *
3997ppc64_elf_link_hash_table_create (bfd *abfd)
3998{
3999 struct ppc_link_hash_table *htab;
4000 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4001
4002 htab = bfd_zmalloc (amt);
4003 if (htab == NULL)
4004 return NULL;
4005
4006 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4007 sizeof (struct ppc_link_hash_entry),
4008 PPC64_ELF_DATA))
4009 {
4010 free (htab);
4011 return NULL;
4012 }
4013
4014 /* Init the stub hash table too. */
4015 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4016 sizeof (struct ppc_stub_hash_entry)))
4017 return NULL;
4018
4019 /* And the branch hash table. */
4020 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4021 sizeof (struct ppc_branch_hash_entry)))
4022 return NULL;
4023
4024 htab->tocsave_htab = htab_try_create (1024,
4025 tocsave_htab_hash,
4026 tocsave_htab_eq,
4027 NULL);
4028 if (htab->tocsave_htab == NULL)
4029 return NULL;
4030
4031 /* Initializing two fields of the union is just cosmetic. We really
4032 only care about glist, but when compiled on a 32-bit host the
4033 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4034 debugger inspection of these fields look nicer. */
4035 htab->elf.init_got_refcount.refcount = 0;
4036 htab->elf.init_got_refcount.glist = NULL;
4037 htab->elf.init_plt_refcount.refcount = 0;
4038 htab->elf.init_plt_refcount.glist = NULL;
4039 htab->elf.init_got_offset.offset = 0;
4040 htab->elf.init_got_offset.glist = NULL;
4041 htab->elf.init_plt_offset.offset = 0;
4042 htab->elf.init_plt_offset.glist = NULL;
4043
4044 return &htab->elf.root;
4045}
4046
4047/* Free the derived linker hash table. */
4048
4049static void
4050ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4051{
4052 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4053
4054 bfd_hash_table_free (&htab->stub_hash_table);
4055 bfd_hash_table_free (&htab->branch_hash_table);
4056 if (htab->tocsave_htab)
4057 htab_delete (htab->tocsave_htab);
4058 _bfd_elf_link_hash_table_free (hash);
4059}
4060
4061/* Create sections for linker generated code. */
4062
4063static bfd_boolean
4064create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4065{
4066 struct ppc_link_hash_table *htab;
4067 flagword flags;
4068
4069 htab = ppc_hash_table (info);
4070
4071 /* Create .sfpr for code to save and restore fp regs. */
4072 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4073 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4074 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4075 flags);
4076 if (htab->sfpr == NULL
4077 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4078 return FALSE;
4079
4080 /* Create .glink for lazy dynamic linking support. */
4081 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4082 flags);
4083 if (htab->glink == NULL
4084 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4085 return FALSE;
4086
4087 if (!info->no_ld_generated_unwind_info)
4088 {
4089 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4090 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4091 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4092 ".eh_frame",
4093 flags);
4094 if (htab->glink_eh_frame == NULL
4095 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4096 return FALSE;
4097 }
4098
4099 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4100 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4101 if (htab->iplt == NULL
4102 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4103 return FALSE;
4104
4105 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4106 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4107 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4108 ".rela.iplt",
4109 flags);
4110 if (htab->reliplt == NULL
4111 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4112 return FALSE;
4113
4114 /* Create branch lookup table for plt_branch stubs. */
4115 flags = (SEC_ALLOC | SEC_LOAD
4116 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4117 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4118 flags);
4119 if (htab->brlt == NULL
4120 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4121 return FALSE;
4122
4123 if (!info->shared)
4124 return TRUE;
4125
4126 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4127 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4128 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4129 ".rela.branch_lt",
4130 flags);
4131 if (htab->relbrlt == NULL
4132 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4133 return FALSE;
4134
4135 return TRUE;
4136}
4137
4138/* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4139
4140bfd_boolean
4141ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4142{
4143 struct ppc_link_hash_table *htab;
4144
4145 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4146
4147/* Always hook our dynamic sections into the first bfd, which is the
4148 linker created stub bfd. This ensures that the GOT header is at
4149 the start of the output TOC section. */
4150 htab = ppc_hash_table (info);
4151 if (htab == NULL)
4152 return FALSE;
4153 htab->stub_bfd = abfd;
4154 htab->elf.dynobj = abfd;
4155
4156 if (info->relocatable)
4157 return TRUE;
4158
4159 return create_linkage_sections (htab->elf.dynobj, info);
4160}
4161
4162/* Build a name for an entry in the stub hash table. */
4163
4164static char *
4165ppc_stub_name (const asection *input_section,
4166 const asection *sym_sec,
4167 const struct ppc_link_hash_entry *h,
4168 const Elf_Internal_Rela *rel)
4169{
4170 char *stub_name;
4171 ssize_t len;
4172
4173 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4174 offsets from a sym as a branch target? In fact, we could
4175 probably assume the addend is always zero. */
4176 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4177
4178 if (h)
4179 {
4180 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4181 stub_name = bfd_malloc (len);
4182 if (stub_name == NULL)
4183 return stub_name;
4184
4185 len = sprintf (stub_name, "%08x.%s+%x",
4186 input_section->id & 0xffffffff,
4187 h->elf.root.root.string,
4188 (int) rel->r_addend & 0xffffffff);
4189 }
4190 else
4191 {
4192 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4193 stub_name = bfd_malloc (len);
4194 if (stub_name == NULL)
4195 return stub_name;
4196
4197 len = sprintf (stub_name, "%08x.%x:%x+%x",
4198 input_section->id & 0xffffffff,
4199 sym_sec->id & 0xffffffff,
4200 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4201 (int) rel->r_addend & 0xffffffff);
4202 }
4203 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4204 stub_name[len - 2] = 0;
4205 return stub_name;
4206}
4207
4208/* Look up an entry in the stub hash. Stub entries are cached because
4209 creating the stub name takes a bit of time. */
4210
4211static struct ppc_stub_hash_entry *
4212ppc_get_stub_entry (const asection *input_section,
4213 const asection *sym_sec,
4214 struct ppc_link_hash_entry *h,
4215 const Elf_Internal_Rela *rel,
4216 struct ppc_link_hash_table *htab)
4217{
4218 struct ppc_stub_hash_entry *stub_entry;
4219 const asection *id_sec;
4220
4221 /* If this input section is part of a group of sections sharing one
4222 stub section, then use the id of the first section in the group.
4223 Stub names need to include a section id, as there may well be
4224 more than one stub used to reach say, printf, and we need to
4225 distinguish between them. */
4226 id_sec = htab->stub_group[input_section->id].link_sec;
4227
4228 if (h != NULL && h->u.stub_cache != NULL
4229 && h->u.stub_cache->h == h
4230 && h->u.stub_cache->id_sec == id_sec)
4231 {
4232 stub_entry = h->u.stub_cache;
4233 }
4234 else
4235 {
4236 char *stub_name;
4237
4238 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4239 if (stub_name == NULL)
4240 return NULL;
4241
4242 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4243 stub_name, FALSE, FALSE);
4244 if (h != NULL)
4245 h->u.stub_cache = stub_entry;
4246
4247 free (stub_name);
4248 }
4249
4250 return stub_entry;
4251}
4252
4253/* Add a new stub entry to the stub hash. Not all fields of the new
4254 stub entry are initialised. */
4255
4256static struct ppc_stub_hash_entry *
4257ppc_add_stub (const char *stub_name,
4258 asection *section,
4259 struct bfd_link_info *info)
4260{
4261 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4262 asection *link_sec;
4263 asection *stub_sec;
4264 struct ppc_stub_hash_entry *stub_entry;
4265
4266 link_sec = htab->stub_group[section->id].link_sec;
4267 stub_sec = htab->stub_group[section->id].stub_sec;
4268 if (stub_sec == NULL)
4269 {
4270 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4271 if (stub_sec == NULL)
4272 {
4273 size_t namelen;
4274 bfd_size_type len;
4275 char *s_name;
4276
4277 namelen = strlen (link_sec->name);
4278 len = namelen + sizeof (STUB_SUFFIX);
4279 s_name = bfd_alloc (htab->stub_bfd, len);
4280 if (s_name == NULL)
4281 return NULL;
4282
4283 memcpy (s_name, link_sec->name, namelen);
4284 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4285 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4286 if (stub_sec == NULL)
4287 return NULL;
4288 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4289 }
4290 htab->stub_group[section->id].stub_sec = stub_sec;
4291 }
4292
4293 /* Enter this entry into the linker stub hash table. */
4294 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4295 TRUE, FALSE);
4296 if (stub_entry == NULL)
4297 {
4298 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4299 section->owner, stub_name);
4300 return NULL;
4301 }
4302
4303 stub_entry->stub_sec = stub_sec;
4304 stub_entry->stub_offset = 0;
4305 stub_entry->id_sec = link_sec;
4306 return stub_entry;
4307}
4308
4309/* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4310 not already done. */
4311
4312static bfd_boolean
4313create_got_section (bfd *abfd, struct bfd_link_info *info)
4314{
4315 asection *got, *relgot;
4316 flagword flags;
4317 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4318
4319 if (!is_ppc64_elf (abfd))
4320 return FALSE;
4321 if (htab == NULL)
4322 return FALSE;
4323
4324 if (!htab->got)
4325 {
4326 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4327 return FALSE;
4328
4329 htab->got = bfd_get_linker_section (htab->elf.dynobj, ".got");
4330 if (!htab->got)
4331 abort ();
4332 }
4333
4334 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4335 | SEC_LINKER_CREATED);
4336
4337 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4338 if (!got
4339 || !bfd_set_section_alignment (abfd, got, 3))
4340 return FALSE;
4341
4342 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4343 flags | SEC_READONLY);
4344 if (!relgot
4345 || ! bfd_set_section_alignment (abfd, relgot, 3))
4346 return FALSE;
4347
4348 ppc64_elf_tdata (abfd)->got = got;
4349 ppc64_elf_tdata (abfd)->relgot = relgot;
4350 return TRUE;
4351}
4352
4353/* Create the dynamic sections, and set up shortcuts. */
4354
4355static bfd_boolean
4356ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4357{
4358 struct ppc_link_hash_table *htab;
4359
4360 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4361 return FALSE;
4362
4363 htab = ppc_hash_table (info);
4364 if (htab == NULL)
4365 return FALSE;
4366
4367 if (!htab->got)
4368 htab->got = bfd_get_linker_section (dynobj, ".got");
4369 htab->plt = bfd_get_linker_section (dynobj, ".plt");
4370 htab->relplt = bfd_get_linker_section (dynobj, ".rela.plt");
4371 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4372 if (!info->shared)
4373 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4374
4375 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4376 || (!info->shared && !htab->relbss))
4377 abort ();
4378
4379 return TRUE;
4380}
4381
4382/* Follow indirect and warning symbol links. */
4383
4384static inline struct bfd_link_hash_entry *
4385follow_link (struct bfd_link_hash_entry *h)
4386{
4387 while (h->type == bfd_link_hash_indirect
4388 || h->type == bfd_link_hash_warning)
4389 h = h->u.i.link;
4390 return h;
4391}
4392
4393static inline struct elf_link_hash_entry *
4394elf_follow_link (struct elf_link_hash_entry *h)
4395{
4396 return (struct elf_link_hash_entry *) follow_link (&h->root);
4397}
4398
4399static inline struct ppc_link_hash_entry *
4400ppc_follow_link (struct ppc_link_hash_entry *h)
4401{
4402 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4403}
4404
4405/* Merge PLT info on FROM with that on TO. */
4406
4407static void
4408move_plt_plist (struct ppc_link_hash_entry *from,
4409 struct ppc_link_hash_entry *to)
4410{
4411 if (from->elf.plt.plist != NULL)
4412 {
4413 if (to->elf.plt.plist != NULL)
4414 {
4415 struct plt_entry **entp;
4416 struct plt_entry *ent;
4417
4418 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4419 {
4420 struct plt_entry *dent;
4421
4422 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4423 if (dent->addend == ent->addend)
4424 {
4425 dent->plt.refcount += ent->plt.refcount;
4426 *entp = ent->next;
4427 break;
4428 }
4429 if (dent == NULL)
4430 entp = &ent->next;
4431 }
4432 *entp = to->elf.plt.plist;
4433 }
4434
4435 to->elf.plt.plist = from->elf.plt.plist;
4436 from->elf.plt.plist = NULL;
4437 }
4438}
4439
4440/* Copy the extra info we tack onto an elf_link_hash_entry. */
4441
4442static void
4443ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4444 struct elf_link_hash_entry *dir,
4445 struct elf_link_hash_entry *ind)
4446{
4447 struct ppc_link_hash_entry *edir, *eind;
4448
4449 edir = (struct ppc_link_hash_entry *) dir;
4450 eind = (struct ppc_link_hash_entry *) ind;
4451
4452 edir->is_func |= eind->is_func;
4453 edir->is_func_descriptor |= eind->is_func_descriptor;
4454 edir->tls_mask |= eind->tls_mask;
4455 if (eind->oh != NULL)
4456 edir->oh = ppc_follow_link (eind->oh);
4457
4458 /* If called to transfer flags for a weakdef during processing
4459 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4460 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4461 if (!(ELIMINATE_COPY_RELOCS
4462 && eind->elf.root.type != bfd_link_hash_indirect
4463 && edir->elf.dynamic_adjusted))
4464 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4465
4466 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4467 edir->elf.ref_regular |= eind->elf.ref_regular;
4468 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4469 edir->elf.needs_plt |= eind->elf.needs_plt;
4470
4471 /* Copy over any dynamic relocs we may have on the indirect sym. */
4472 if (eind->dyn_relocs != NULL)
4473 {
4474 if (edir->dyn_relocs != NULL)
4475 {
4476 struct elf_dyn_relocs **pp;
4477 struct elf_dyn_relocs *p;
4478
4479 /* Add reloc counts against the indirect sym to the direct sym
4480 list. Merge any entries against the same section. */
4481 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4482 {
4483 struct elf_dyn_relocs *q;
4484
4485 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4486 if (q->sec == p->sec)
4487 {
4488 q->pc_count += p->pc_count;
4489 q->count += p->count;
4490 *pp = p->next;
4491 break;
4492 }
4493 if (q == NULL)
4494 pp = &p->next;
4495 }
4496 *pp = edir->dyn_relocs;
4497 }
4498
4499 edir->dyn_relocs = eind->dyn_relocs;
4500 eind->dyn_relocs = NULL;
4501 }
4502
4503 /* If we were called to copy over info for a weak sym, that's all.
4504 You might think dyn_relocs need not be copied over; After all,
4505 both syms will be dynamic or both non-dynamic so we're just
4506 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4507 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4508 dyn_relocs in read-only sections, and it does so on what is the
4509 DIR sym here. */
4510 if (eind->elf.root.type != bfd_link_hash_indirect)
4511 return;
4512
4513 /* Copy over got entries that we may have already seen to the
4514 symbol which just became indirect. */
4515 if (eind->elf.got.glist != NULL)
4516 {
4517 if (edir->elf.got.glist != NULL)
4518 {
4519 struct got_entry **entp;
4520 struct got_entry *ent;
4521
4522 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4523 {
4524 struct got_entry *dent;
4525
4526 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4527 if (dent->addend == ent->addend
4528 && dent->owner == ent->owner
4529 && dent->tls_type == ent->tls_type)
4530 {
4531 dent->got.refcount += ent->got.refcount;
4532 *entp = ent->next;
4533 break;
4534 }
4535 if (dent == NULL)
4536 entp = &ent->next;
4537 }
4538 *entp = edir->elf.got.glist;
4539 }
4540
4541 edir->elf.got.glist = eind->elf.got.glist;
4542 eind->elf.got.glist = NULL;
4543 }
4544
4545 /* And plt entries. */
4546 move_plt_plist (eind, edir);
4547
4548 if (eind->elf.dynindx != -1)
4549 {
4550 if (edir->elf.dynindx != -1)
4551 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4552 edir->elf.dynstr_index);
4553 edir->elf.dynindx = eind->elf.dynindx;
4554 edir->elf.dynstr_index = eind->elf.dynstr_index;
4555 eind->elf.dynindx = -1;
4556 eind->elf.dynstr_index = 0;
4557 }
4558}
4559
4560/* Find the function descriptor hash entry from the given function code
4561 hash entry FH. Link the entries via their OH fields. */
4562
4563static struct ppc_link_hash_entry *
4564lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4565{
4566 struct ppc_link_hash_entry *fdh = fh->oh;
4567
4568 if (fdh == NULL)
4569 {
4570 const char *fd_name = fh->elf.root.root.string + 1;
4571
4572 fdh = (struct ppc_link_hash_entry *)
4573 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4574 if (fdh == NULL)
4575 return fdh;
4576
4577 fdh->is_func_descriptor = 1;
4578 fdh->oh = fh;
4579 fh->is_func = 1;
4580 fh->oh = fdh;
4581 }
4582
4583 return ppc_follow_link (fdh);
4584}
4585
4586/* Make a fake function descriptor sym for the code sym FH. */
4587
4588static struct ppc_link_hash_entry *
4589make_fdh (struct bfd_link_info *info,
4590 struct ppc_link_hash_entry *fh)
4591{
4592 bfd *abfd;
4593 asymbol *newsym;
4594 struct bfd_link_hash_entry *bh;
4595 struct ppc_link_hash_entry *fdh;
4596
4597 abfd = fh->elf.root.u.undef.abfd;
4598 newsym = bfd_make_empty_symbol (abfd);
4599 newsym->name = fh->elf.root.root.string + 1;
4600 newsym->section = bfd_und_section_ptr;
4601 newsym->value = 0;
4602 newsym->flags = BSF_WEAK;
4603
4604 bh = NULL;
4605 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4606 newsym->flags, newsym->section,
4607 newsym->value, NULL, FALSE, FALSE,
4608 &bh))
4609 return NULL;
4610
4611 fdh = (struct ppc_link_hash_entry *) bh;
4612 fdh->elf.non_elf = 0;
4613 fdh->fake = 1;
4614 fdh->is_func_descriptor = 1;
4615 fdh->oh = fh;
4616 fh->is_func = 1;
4617 fh->oh = fdh;
4618 return fdh;
4619}
4620
4621/* Fix function descriptor symbols defined in .opd sections to be
4622 function type. */
4623
4624static bfd_boolean
4625ppc64_elf_add_symbol_hook (bfd *ibfd,
4626 struct bfd_link_info *info,
4627 Elf_Internal_Sym *isym,
4628 const char **name ATTRIBUTE_UNUSED,
4629 flagword *flags ATTRIBUTE_UNUSED,
4630 asection **sec,
4631 bfd_vma *value ATTRIBUTE_UNUSED)
4632{
4633 if ((ibfd->flags & DYNAMIC) == 0
4634 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4635 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4636
4637 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4638 {
4639 if ((ibfd->flags & DYNAMIC) == 0)
4640 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4641 }
4642 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4643 ;
4644 else if (*sec != NULL
4645 && strcmp ((*sec)->name, ".opd") == 0)
4646 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4647
4648 return TRUE;
4649}
4650
4651/* This function makes an old ABI object reference to ".bar" cause the
4652 inclusion of a new ABI object archive that defines "bar".
4653 NAME is a symbol defined in an archive. Return a symbol in the hash
4654 table that might be satisfied by the archive symbols. */
4655
4656static struct elf_link_hash_entry *
4657ppc64_elf_archive_symbol_lookup (bfd *abfd,
4658 struct bfd_link_info *info,
4659 const char *name)
4660{
4661 struct elf_link_hash_entry *h;
4662 char *dot_name;
4663 size_t len;
4664
4665 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4666 if (h != NULL
4667 /* Don't return this sym if it is a fake function descriptor
4668 created by add_symbol_adjust. */
4669 && !(h->root.type == bfd_link_hash_undefweak
4670 && ((struct ppc_link_hash_entry *) h)->fake))
4671 return h;
4672
4673 if (name[0] == '.')
4674 return h;
4675
4676 len = strlen (name);
4677 dot_name = bfd_alloc (abfd, len + 2);
4678 if (dot_name == NULL)
4679 return (struct elf_link_hash_entry *) 0 - 1;
4680 dot_name[0] = '.';
4681 memcpy (dot_name + 1, name, len + 1);
4682 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4683 bfd_release (abfd, dot_name);
4684 return h;
4685}
4686
4687/* This function satisfies all old ABI object references to ".bar" if a
4688 new ABI object defines "bar". Well, at least, undefined dot symbols
4689 are made weak. This stops later archive searches from including an
4690 object if we already have a function descriptor definition. It also
4691 prevents the linker complaining about undefined symbols.
4692 We also check and correct mismatched symbol visibility here. The
4693 most restrictive visibility of the function descriptor and the
4694 function entry symbol is used. */
4695
4696static bfd_boolean
4697add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4698{
4699 struct ppc_link_hash_table *htab;
4700 struct ppc_link_hash_entry *fdh;
4701
4702 if (eh->elf.root.type == bfd_link_hash_indirect)
4703 return TRUE;
4704
4705 if (eh->elf.root.type == bfd_link_hash_warning)
4706 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4707
4708 if (eh->elf.root.root.string[0] != '.')
4709 abort ();
4710
4711 htab = ppc_hash_table (info);
4712 if (htab == NULL)
4713 return FALSE;
4714
4715 fdh = lookup_fdh (eh, htab);
4716 if (fdh == NULL)
4717 {
4718 if (!info->relocatable
4719 && (eh->elf.root.type == bfd_link_hash_undefined
4720 || eh->elf.root.type == bfd_link_hash_undefweak)
4721 && eh->elf.ref_regular)
4722 {
4723 /* Make an undefweak function descriptor sym, which is enough to
4724 pull in an --as-needed shared lib, but won't cause link
4725 errors. Archives are handled elsewhere. */
4726 fdh = make_fdh (info, eh);
4727 if (fdh == NULL)
4728 return FALSE;
4729 fdh->elf.ref_regular = 1;
4730 }
4731 }
4732 else
4733 {
4734 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4735 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4736 if (entry_vis < descr_vis)
4737 fdh->elf.other += entry_vis - descr_vis;
4738 else if (entry_vis > descr_vis)
4739 eh->elf.other += descr_vis - entry_vis;
4740
4741 if ((fdh->elf.root.type == bfd_link_hash_defined
4742 || fdh->elf.root.type == bfd_link_hash_defweak)
4743 && eh->elf.root.type == bfd_link_hash_undefined)
4744 {
4745 eh->elf.root.type = bfd_link_hash_undefweak;
4746 eh->was_undefined = 1;
4747 htab->twiddled_syms = 1;
4748 }
4749 }
4750
4751 return TRUE;
4752}
4753
4754/* Process list of dot-symbols we made in link_hash_newfunc. */
4755
4756static bfd_boolean
4757ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4758{
4759 struct ppc_link_hash_table *htab;
4760 struct ppc_link_hash_entry **p, *eh;
4761
4762 if (!is_ppc64_elf (info->output_bfd))
4763 return TRUE;
4764 htab = ppc_hash_table (info);
4765 if (htab == NULL)
4766 return FALSE;
4767
4768 if (is_ppc64_elf (ibfd))
4769 {
4770 p = &htab->dot_syms;
4771 while ((eh = *p) != NULL)
4772 {
4773 *p = NULL;
4774 if (&eh->elf == htab->elf.hgot)
4775 ;
4776 else if (htab->elf.hgot == NULL
4777 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
4778 htab->elf.hgot = &eh->elf;
4779 else if (!add_symbol_adjust (eh, info))
4780 return FALSE;
4781 p = &eh->u.next_dot_sym;
4782 }
4783 }
4784
4785 /* Clear the list for non-ppc64 input files. */
4786 p = &htab->dot_syms;
4787 while ((eh = *p) != NULL)
4788 {
4789 *p = NULL;
4790 p = &eh->u.next_dot_sym;
4791 }
4792
4793 /* We need to fix the undefs list for any syms we have twiddled to
4794 undef_weak. */
4795 if (htab->twiddled_syms)
4796 {
4797 bfd_link_repair_undef_list (&htab->elf.root);
4798 htab->twiddled_syms = 0;
4799 }
4800 return TRUE;
4801}
4802
4803/* Undo hash table changes when an --as-needed input file is determined
4804 not to be needed. */
4805
4806static bfd_boolean
4807ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4808 struct bfd_link_info *info)
4809{
4810 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4811
4812 if (htab == NULL)
4813 return FALSE;
4814
4815 htab->dot_syms = NULL;
4816 return TRUE;
4817}
4818
4819/* If --just-symbols against a final linked binary, then assume we need
4820 toc adjusting stubs when calling functions defined there. */
4821
4822static void
4823ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4824{
4825 if ((sec->flags & SEC_CODE) != 0
4826 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4827 && is_ppc64_elf (sec->owner))
4828 {
4829 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4830 if (got != NULL
4831 && got->size >= elf_backend_got_header_size
4832 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4833 sec->has_toc_reloc = 1;
4834 }
4835 _bfd_elf_link_just_syms (sec, info);
4836}
4837
4838static struct plt_entry **
4839update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4840 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4841{
4842 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4843 struct plt_entry **local_plt;
4844 unsigned char *local_got_tls_masks;
4845
4846 if (local_got_ents == NULL)
4847 {
4848 bfd_size_type size = symtab_hdr->sh_info;
4849
4850 size *= (sizeof (*local_got_ents)
4851 + sizeof (*local_plt)
4852 + sizeof (*local_got_tls_masks));
4853 local_got_ents = bfd_zalloc (abfd, size);
4854 if (local_got_ents == NULL)
4855 return NULL;
4856 elf_local_got_ents (abfd) = local_got_ents;
4857 }
4858
4859 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4860 {
4861 struct got_entry *ent;
4862
4863 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4864 if (ent->addend == r_addend
4865 && ent->owner == abfd
4866 && ent->tls_type == tls_type)
4867 break;
4868 if (ent == NULL)
4869 {
4870 bfd_size_type amt = sizeof (*ent);
4871 ent = bfd_alloc (abfd, amt);
4872 if (ent == NULL)
4873 return FALSE;
4874 ent->next = local_got_ents[r_symndx];
4875 ent->addend = r_addend;
4876 ent->owner = abfd;
4877 ent->tls_type = tls_type;
4878 ent->is_indirect = FALSE;
4879 ent->got.refcount = 0;
4880 local_got_ents[r_symndx] = ent;
4881 }
4882 ent->got.refcount += 1;
4883 }
4884
4885 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4886 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4887 local_got_tls_masks[r_symndx] |= tls_type;
4888
4889 return local_plt + r_symndx;
4890}
4891
4892static bfd_boolean
4893update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4894{
4895 struct plt_entry *ent;
4896
4897 for (ent = *plist; ent != NULL; ent = ent->next)
4898 if (ent->addend == addend)
4899 break;
4900 if (ent == NULL)
4901 {
4902 bfd_size_type amt = sizeof (*ent);
4903 ent = bfd_alloc (abfd, amt);
4904 if (ent == NULL)
4905 return FALSE;
4906 ent->next = *plist;
4907 ent->addend = addend;
4908 ent->plt.refcount = 0;
4909 *plist = ent;
4910 }
4911 ent->plt.refcount += 1;
4912 return TRUE;
4913}
4914
4915static bfd_boolean
4916is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4917{
4918 return (r_type == R_PPC64_REL24
4919 || r_type == R_PPC64_REL14
4920 || r_type == R_PPC64_REL14_BRTAKEN
4921 || r_type == R_PPC64_REL14_BRNTAKEN
4922 || r_type == R_PPC64_ADDR24
4923 || r_type == R_PPC64_ADDR14
4924 || r_type == R_PPC64_ADDR14_BRTAKEN
4925 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4926}
4927
4928/* Look through the relocs for a section during the first phase, and
4929 calculate needed space in the global offset table, procedure
4930 linkage table, and dynamic reloc sections. */
4931
4932static bfd_boolean
4933ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4934 asection *sec, const Elf_Internal_Rela *relocs)
4935{
4936 struct ppc_link_hash_table *htab;
4937 Elf_Internal_Shdr *symtab_hdr;
4938 struct elf_link_hash_entry **sym_hashes;
4939 const Elf_Internal_Rela *rel;
4940 const Elf_Internal_Rela *rel_end;
4941 asection *sreloc;
4942 asection **opd_sym_map;
4943 struct elf_link_hash_entry *tga, *dottga;
4944
4945 if (info->relocatable)
4946 return TRUE;
4947
4948 /* Don't do anything special with non-loaded, non-alloced sections.
4949 In particular, any relocs in such sections should not affect GOT
4950 and PLT reference counting (ie. we don't allow them to create GOT
4951 or PLT entries), there's no possibility or desire to optimize TLS
4952 relocs, and there's not much point in propagating relocs to shared
4953 libs that the dynamic linker won't relocate. */
4954 if ((sec->flags & SEC_ALLOC) == 0)
4955 return TRUE;
4956
4957 BFD_ASSERT (is_ppc64_elf (abfd));
4958
4959 htab = ppc_hash_table (info);
4960 if (htab == NULL)
4961 return FALSE;
4962
4963 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4964 FALSE, FALSE, TRUE);
4965 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4966 FALSE, FALSE, TRUE);
4967 symtab_hdr = &elf_symtab_hdr (abfd);
4968 sym_hashes = elf_sym_hashes (abfd);
4969 sreloc = NULL;
4970 opd_sym_map = NULL;
4971 if (strcmp (sec->name, ".opd") == 0)
4972 {
4973 /* Garbage collection needs some extra help with .opd sections.
4974 We don't want to necessarily keep everything referenced by
4975 relocs in .opd, as that would keep all functions. Instead,
4976 if we reference an .opd symbol (a function descriptor), we
4977 want to keep the function code symbol's section. This is
4978 easy for global symbols, but for local syms we need to keep
4979 information about the associated function section. */
4980 bfd_size_type amt;
4981
4982 amt = sec->size * sizeof (*opd_sym_map) / 8;
4983 opd_sym_map = bfd_zalloc (abfd, amt);
4984 if (opd_sym_map == NULL)
4985 return FALSE;
4986 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4987 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4988 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4989 }
4990
4991 rel_end = relocs + sec->reloc_count;
4992 for (rel = relocs; rel < rel_end; rel++)
4993 {
4994 unsigned long r_symndx;
4995 struct elf_link_hash_entry *h;
4996 enum elf_ppc64_reloc_type r_type;
4997 int tls_type;
4998 struct _ppc64_elf_section_data *ppc64_sec;
4999 struct plt_entry **ifunc;
5000
5001 r_symndx = ELF64_R_SYM (rel->r_info);
5002 if (r_symndx < symtab_hdr->sh_info)
5003 h = NULL;
5004 else
5005 {
5006 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5007 h = elf_follow_link (h);
5008
5009 /* PR15323, ref flags aren't set for references in the same
5010 object. */
5011 h->root.non_ir_ref = 1;
5012
5013 if (h == htab->elf.hgot)
5014 sec->has_toc_reloc = 1;
5015 }
5016
5017 tls_type = 0;
5018 ifunc = NULL;
5019 if (h != NULL)
5020 {
5021 if (h->type == STT_GNU_IFUNC)
5022 {
5023 h->needs_plt = 1;
5024 ifunc = &h->plt.plist;
5025 }
5026 }
5027 else
5028 {
5029 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5030 abfd, r_symndx);
5031 if (isym == NULL)
5032 return FALSE;
5033
5034 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5035 {
5036 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5037 rel->r_addend, PLT_IFUNC);
5038 if (ifunc == NULL)
5039 return FALSE;
5040 }
5041 }
5042 r_type = ELF64_R_TYPE (rel->r_info);
5043 if (is_branch_reloc (r_type))
5044 {
5045 if (h != NULL && (h == tga || h == dottga))
5046 {
5047 if (rel != relocs
5048 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5049 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5050 /* We have a new-style __tls_get_addr call with a marker
5051 reloc. */
5052 ;
5053 else
5054 /* Mark this section as having an old-style call. */
5055 sec->has_tls_get_addr_call = 1;
5056 }
5057
5058 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5059 if (ifunc != NULL
5060 && !update_plt_info (abfd, ifunc, rel->r_addend))
5061 return FALSE;
5062 }
5063
5064 switch (r_type)
5065 {
5066 case R_PPC64_TLSGD:
5067 case R_PPC64_TLSLD:
5068 /* These special tls relocs tie a call to __tls_get_addr with
5069 its parameter symbol. */
5070 break;
5071
5072 case R_PPC64_GOT_TLSLD16:
5073 case R_PPC64_GOT_TLSLD16_LO:
5074 case R_PPC64_GOT_TLSLD16_HI:
5075 case R_PPC64_GOT_TLSLD16_HA:
5076 tls_type = TLS_TLS | TLS_LD;
5077 goto dogottls;
5078
5079 case R_PPC64_GOT_TLSGD16:
5080 case R_PPC64_GOT_TLSGD16_LO:
5081 case R_PPC64_GOT_TLSGD16_HI:
5082 case R_PPC64_GOT_TLSGD16_HA:
5083 tls_type = TLS_TLS | TLS_GD;
5084 goto dogottls;
5085
5086 case R_PPC64_GOT_TPREL16_DS:
5087 case R_PPC64_GOT_TPREL16_LO_DS:
5088 case R_PPC64_GOT_TPREL16_HI:
5089 case R_PPC64_GOT_TPREL16_HA:
5090 if (!info->executable)
5091 info->flags |= DF_STATIC_TLS;
5092 tls_type = TLS_TLS | TLS_TPREL;
5093 goto dogottls;
5094
5095 case R_PPC64_GOT_DTPREL16_DS:
5096 case R_PPC64_GOT_DTPREL16_LO_DS:
5097 case R_PPC64_GOT_DTPREL16_HI:
5098 case R_PPC64_GOT_DTPREL16_HA:
5099 tls_type = TLS_TLS | TLS_DTPREL;
5100 dogottls:
5101 sec->has_tls_reloc = 1;
5102 /* Fall thru */
5103
5104 case R_PPC64_GOT16:
5105 case R_PPC64_GOT16_DS:
5106 case R_PPC64_GOT16_HA:
5107 case R_PPC64_GOT16_HI:
5108 case R_PPC64_GOT16_LO:
5109 case R_PPC64_GOT16_LO_DS:
5110 /* This symbol requires a global offset table entry. */
5111 sec->has_toc_reloc = 1;
5112 if (r_type == R_PPC64_GOT_TLSLD16
5113 || r_type == R_PPC64_GOT_TLSGD16
5114 || r_type == R_PPC64_GOT_TPREL16_DS
5115 || r_type == R_PPC64_GOT_DTPREL16_DS
5116 || r_type == R_PPC64_GOT16
5117 || r_type == R_PPC64_GOT16_DS)
5118 {
5119 htab->do_multi_toc = 1;
5120 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5121 }
5122
5123 if (ppc64_elf_tdata (abfd)->got == NULL
5124 && !create_got_section (abfd, info))
5125 return FALSE;
5126
5127 if (h != NULL)
5128 {
5129 struct ppc_link_hash_entry *eh;
5130 struct got_entry *ent;
5131
5132 eh = (struct ppc_link_hash_entry *) h;
5133 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5134 if (ent->addend == rel->r_addend
5135 && ent->owner == abfd
5136 && ent->tls_type == tls_type)
5137 break;
5138 if (ent == NULL)
5139 {
5140 bfd_size_type amt = sizeof (*ent);
5141 ent = bfd_alloc (abfd, amt);
5142 if (ent == NULL)
5143 return FALSE;
5144 ent->next = eh->elf.got.glist;
5145 ent->addend = rel->r_addend;
5146 ent->owner = abfd;
5147 ent->tls_type = tls_type;
5148 ent->is_indirect = FALSE;
5149 ent->got.refcount = 0;
5150 eh->elf.got.glist = ent;
5151 }
5152 ent->got.refcount += 1;
5153 eh->tls_mask |= tls_type;
5154 }
5155 else
5156 /* This is a global offset table entry for a local symbol. */
5157 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5158 rel->r_addend, tls_type))
5159 return FALSE;
5160 break;
5161
5162 case R_PPC64_PLT16_HA:
5163 case R_PPC64_PLT16_HI:
5164 case R_PPC64_PLT16_LO:
5165 case R_PPC64_PLT32:
5166 case R_PPC64_PLT64:
5167 /* This symbol requires a procedure linkage table entry. We
5168 actually build the entry in adjust_dynamic_symbol,
5169 because this might be a case of linking PIC code without
5170 linking in any dynamic objects, in which case we don't
5171 need to generate a procedure linkage table after all. */
5172 if (h == NULL)
5173 {
5174 /* It does not make sense to have a procedure linkage
5175 table entry for a local symbol. */
5176 bfd_set_error (bfd_error_bad_value);
5177 return FALSE;
5178 }
5179 else
5180 {
5181 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5182 return FALSE;
5183 h->needs_plt = 1;
5184 if (h->root.root.string[0] == '.'
5185 && h->root.root.string[1] != '\0')
5186 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5187 }
5188 break;
5189
5190 /* The following relocations don't need to propagate the
5191 relocation if linking a shared object since they are
5192 section relative. */
5193 case R_PPC64_SECTOFF:
5194 case R_PPC64_SECTOFF_LO:
5195 case R_PPC64_SECTOFF_HI:
5196 case R_PPC64_SECTOFF_HA:
5197 case R_PPC64_SECTOFF_DS:
5198 case R_PPC64_SECTOFF_LO_DS:
5199 case R_PPC64_DTPREL16:
5200 case R_PPC64_DTPREL16_LO:
5201 case R_PPC64_DTPREL16_HI:
5202 case R_PPC64_DTPREL16_HA:
5203 case R_PPC64_DTPREL16_DS:
5204 case R_PPC64_DTPREL16_LO_DS:
5205 case R_PPC64_DTPREL16_HIGHER:
5206 case R_PPC64_DTPREL16_HIGHERA:
5207 case R_PPC64_DTPREL16_HIGHEST:
5208 case R_PPC64_DTPREL16_HIGHESTA:
5209 break;
5210
5211 /* Nor do these. */
5212 case R_PPC64_REL16:
5213 case R_PPC64_REL16_LO:
5214 case R_PPC64_REL16_HI:
5215 case R_PPC64_REL16_HA:
5216 break;
5217
5218 case R_PPC64_TOC16:
5219 case R_PPC64_TOC16_DS:
5220 htab->do_multi_toc = 1;
5221 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5222 case R_PPC64_TOC16_LO:
5223 case R_PPC64_TOC16_HI:
5224 case R_PPC64_TOC16_HA:
5225 case R_PPC64_TOC16_LO_DS:
5226 sec->has_toc_reloc = 1;
5227 break;
5228
5229 /* This relocation describes the C++ object vtable hierarchy.
5230 Reconstruct it for later use during GC. */
5231 case R_PPC64_GNU_VTINHERIT:
5232 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5233 return FALSE;
5234 break;
5235
5236 /* This relocation describes which C++ vtable entries are actually
5237 used. Record for later use during GC. */
5238 case R_PPC64_GNU_VTENTRY:
5239 BFD_ASSERT (h != NULL);
5240 if (h != NULL
5241 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5242 return FALSE;
5243 break;
5244
5245 case R_PPC64_REL14:
5246 case R_PPC64_REL14_BRTAKEN:
5247 case R_PPC64_REL14_BRNTAKEN:
5248 {
5249 asection *dest = NULL;
5250
5251 /* Heuristic: If jumping outside our section, chances are
5252 we are going to need a stub. */
5253 if (h != NULL)
5254 {
5255 /* If the sym is weak it may be overridden later, so
5256 don't assume we know where a weak sym lives. */
5257 if (h->root.type == bfd_link_hash_defined)
5258 dest = h->root.u.def.section;
5259 }
5260 else
5261 {
5262 Elf_Internal_Sym *isym;
5263
5264 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5265 abfd, r_symndx);
5266 if (isym == NULL)
5267 return FALSE;
5268
5269 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5270 }
5271
5272 if (dest != sec)
5273 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5274 }
5275 /* Fall through. */
5276
5277 case R_PPC64_REL24:
5278 if (h != NULL && ifunc == NULL)
5279 {
5280 /* We may need a .plt entry if the function this reloc
5281 refers to is in a shared lib. */
5282 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5283 return FALSE;
5284 h->needs_plt = 1;
5285 if (h->root.root.string[0] == '.'
5286 && h->root.root.string[1] != '\0')
5287 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5288 if (h == tga || h == dottga)
5289 sec->has_tls_reloc = 1;
5290 }
5291 break;
5292
5293 case R_PPC64_TPREL64:
5294 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5295 if (!info->executable)
5296 info->flags |= DF_STATIC_TLS;
5297 goto dotlstoc;
5298
5299 case R_PPC64_DTPMOD64:
5300 if (rel + 1 < rel_end
5301 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5302 && rel[1].r_offset == rel->r_offset + 8)
5303 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5304 else
5305 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5306 goto dotlstoc;
5307
5308 case R_PPC64_DTPREL64:
5309 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5310 if (rel != relocs
5311 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5312 && rel[-1].r_offset == rel->r_offset - 8)
5313 /* This is the second reloc of a dtpmod, dtprel pair.
5314 Don't mark with TLS_DTPREL. */
5315 goto dodyn;
5316
5317 dotlstoc:
5318 sec->has_tls_reloc = 1;
5319 if (h != NULL)
5320 {
5321 struct ppc_link_hash_entry *eh;
5322 eh = (struct ppc_link_hash_entry *) h;
5323 eh->tls_mask |= tls_type;
5324 }
5325 else
5326 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5327 rel->r_addend, tls_type))
5328 return FALSE;
5329
5330 ppc64_sec = ppc64_elf_section_data (sec);
5331 if (ppc64_sec->sec_type != sec_toc)
5332 {
5333 bfd_size_type amt;
5334
5335 /* One extra to simplify get_tls_mask. */
5336 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5337 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5338 if (ppc64_sec->u.toc.symndx == NULL)
5339 return FALSE;
5340 amt = sec->size * sizeof (bfd_vma) / 8;
5341 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5342 if (ppc64_sec->u.toc.add == NULL)
5343 return FALSE;
5344 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5345 ppc64_sec->sec_type = sec_toc;
5346 }
5347 BFD_ASSERT (rel->r_offset % 8 == 0);
5348 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5349 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5350
5351 /* Mark the second slot of a GD or LD entry.
5352 -1 to indicate GD and -2 to indicate LD. */
5353 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5354 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5355 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5356 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5357 goto dodyn;
5358
5359 case R_PPC64_TPREL16:
5360 case R_PPC64_TPREL16_LO:
5361 case R_PPC64_TPREL16_HI:
5362 case R_PPC64_TPREL16_HA:
5363 case R_PPC64_TPREL16_DS:
5364 case R_PPC64_TPREL16_LO_DS:
5365 case R_PPC64_TPREL16_HIGHER:
5366 case R_PPC64_TPREL16_HIGHERA:
5367 case R_PPC64_TPREL16_HIGHEST:
5368 case R_PPC64_TPREL16_HIGHESTA:
5369 if (info->shared)
5370 {
5371 if (!info->executable)
5372 info->flags |= DF_STATIC_TLS;
5373 goto dodyn;
5374 }
5375 break;
5376
5377 case R_PPC64_ADDR64:
5378 if (opd_sym_map != NULL
5379 && rel + 1 < rel_end
5380 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5381 {
5382 if (h != NULL)
5383 {
5384 if (h->root.root.string[0] == '.'
5385 && h->root.root.string[1] != 0
5386 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5387 ;
5388 else
5389 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5390 }
5391 else
5392 {
5393 asection *s;
5394 Elf_Internal_Sym *isym;
5395
5396 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5397 abfd, r_symndx);
5398 if (isym == NULL)
5399 return FALSE;
5400
5401 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5402 if (s != NULL && s != sec)
5403 opd_sym_map[rel->r_offset / 8] = s;
5404 }
5405 }
5406 /* Fall through. */
5407
5408 case R_PPC64_REL30:
5409 case R_PPC64_REL32:
5410 case R_PPC64_REL64:
5411 case R_PPC64_ADDR14:
5412 case R_PPC64_ADDR14_BRNTAKEN:
5413 case R_PPC64_ADDR14_BRTAKEN:
5414 case R_PPC64_ADDR16:
5415 case R_PPC64_ADDR16_DS:
5416 case R_PPC64_ADDR16_HA:
5417 case R_PPC64_ADDR16_HI:
5418 case R_PPC64_ADDR16_HIGHER:
5419 case R_PPC64_ADDR16_HIGHERA:
5420 case R_PPC64_ADDR16_HIGHEST:
5421 case R_PPC64_ADDR16_HIGHESTA:
5422 case R_PPC64_ADDR16_LO:
5423 case R_PPC64_ADDR16_LO_DS:
5424 case R_PPC64_ADDR24:
5425 case R_PPC64_ADDR32:
5426 case R_PPC64_UADDR16:
5427 case R_PPC64_UADDR32:
5428 case R_PPC64_UADDR64:
5429 case R_PPC64_TOC:
5430 if (h != NULL && !info->shared)
5431 /* We may need a copy reloc. */
5432 h->non_got_ref = 1;
5433
5434 /* Don't propagate .opd relocs. */
5435 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5436 break;
5437
5438 /* If we are creating a shared library, and this is a reloc
5439 against a global symbol, or a non PC relative reloc
5440 against a local symbol, then we need to copy the reloc
5441 into the shared library. However, if we are linking with
5442 -Bsymbolic, we do not need to copy a reloc against a
5443 global symbol which is defined in an object we are
5444 including in the link (i.e., DEF_REGULAR is set). At
5445 this point we have not seen all the input files, so it is
5446 possible that DEF_REGULAR is not set now but will be set
5447 later (it is never cleared). In case of a weak definition,
5448 DEF_REGULAR may be cleared later by a strong definition in
5449 a shared library. We account for that possibility below by
5450 storing information in the dyn_relocs field of the hash
5451 table entry. A similar situation occurs when creating
5452 shared libraries and symbol visibility changes render the
5453 symbol local.
5454
5455 If on the other hand, we are creating an executable, we
5456 may need to keep relocations for symbols satisfied by a
5457 dynamic library if we manage to avoid copy relocs for the
5458 symbol. */
5459 dodyn:
5460 if ((info->shared
5461 && (must_be_dyn_reloc (info, r_type)
5462 || (h != NULL
5463 && (!SYMBOLIC_BIND (info, h)
5464 || h->root.type == bfd_link_hash_defweak
5465 || !h->def_regular))))
5466 || (ELIMINATE_COPY_RELOCS
5467 && !info->shared
5468 && h != NULL
5469 && (h->root.type == bfd_link_hash_defweak
5470 || !h->def_regular))
5471 || (!info->shared
5472 && ifunc != NULL))
5473 {
5474 /* We must copy these reloc types into the output file.
5475 Create a reloc section in dynobj and make room for
5476 this reloc. */
5477 if (sreloc == NULL)
5478 {
5479 sreloc = _bfd_elf_make_dynamic_reloc_section
5480 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5481
5482 if (sreloc == NULL)
5483 return FALSE;
5484 }
5485
5486 /* If this is a global symbol, we count the number of
5487 relocations we need for this symbol. */
5488 if (h != NULL)
5489 {
5490 struct elf_dyn_relocs *p;
5491 struct elf_dyn_relocs **head;
5492
5493 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5494 p = *head;
5495 if (p == NULL || p->sec != sec)
5496 {
5497 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5498 if (p == NULL)
5499 return FALSE;
5500 p->next = *head;
5501 *head = p;
5502 p->sec = sec;
5503 p->count = 0;
5504 p->pc_count = 0;
5505 }
5506 p->count += 1;
5507 if (!must_be_dyn_reloc (info, r_type))
5508 p->pc_count += 1;
5509 }
5510 else
5511 {
5512 /* Track dynamic relocs needed for local syms too.
5513 We really need local syms available to do this
5514 easily. Oh well. */
5515 struct ppc_dyn_relocs *p;
5516 struct ppc_dyn_relocs **head;
5517 bfd_boolean is_ifunc;
5518 asection *s;
5519 void *vpp;
5520 Elf_Internal_Sym *isym;
5521
5522 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5523 abfd, r_symndx);
5524 if (isym == NULL)
5525 return FALSE;
5526
5527 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5528 if (s == NULL)
5529 s = sec;
5530
5531 vpp = &elf_section_data (s)->local_dynrel;
5532 head = (struct ppc_dyn_relocs **) vpp;
5533 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5534 p = *head;
5535 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5536 p = p->next;
5537 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5538 {
5539 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5540 if (p == NULL)
5541 return FALSE;
5542 p->next = *head;
5543 *head = p;
5544 p->sec = sec;
5545 p->ifunc = is_ifunc;
5546 p->count = 0;
5547 }
5548 p->count += 1;
5549 }
5550 }
5551 break;
5552
5553 default:
5554 break;
5555 }
5556 }
5557
5558 return TRUE;
5559}
5560
5561/* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5562 of the code entry point, and its section. */
5563
5564static bfd_vma
5565opd_entry_value (asection *opd_sec,
5566 bfd_vma offset,
5567 asection **code_sec,
5568 bfd_vma *code_off,
5569 bfd_boolean in_code_sec)
5570{
5571 bfd *opd_bfd = opd_sec->owner;
5572 Elf_Internal_Rela *relocs;
5573 Elf_Internal_Rela *lo, *hi, *look;
5574 bfd_vma val;
5575
5576 /* No relocs implies we are linking a --just-symbols object, or looking
5577 at a final linked executable with addr2line or somesuch. */
5578 if (opd_sec->reloc_count == 0)
5579 {
5580 char buf[8];
5581
5582 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5583 return (bfd_vma) -1;
5584
5585 val = bfd_get_64 (opd_bfd, buf);
5586 if (code_sec != NULL)
5587 {
5588 asection *sec, *likely = NULL;
5589
5590 if (in_code_sec)
5591 {
5592 sec = *code_sec;
5593 if (sec->vma <= val
5594 && val < sec->vma + sec->size)
5595 likely = sec;
5596 else
5597 val = -1;
5598 }
5599 else
5600 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5601 if (sec->vma <= val
5602 && (sec->flags & SEC_LOAD) != 0
5603 && (sec->flags & SEC_ALLOC) != 0)
5604 likely = sec;
5605 if (likely != NULL)
5606 {
5607 *code_sec = likely;
5608 if (code_off != NULL)
5609 *code_off = val - likely->vma;
5610 }
5611 }
5612 return val;
5613 }
5614
5615 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5616
5617 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5618 if (relocs == NULL)
5619 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5620
5621 /* Go find the opd reloc at the sym address. */
5622 lo = relocs;
5623 BFD_ASSERT (lo != NULL);
5624 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5625 val = (bfd_vma) -1;
5626 while (lo < hi)
5627 {
5628 look = lo + (hi - lo) / 2;
5629 if (look->r_offset < offset)
5630 lo = look + 1;
5631 else if (look->r_offset > offset)
5632 hi = look;
5633 else
5634 {
5635 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5636
5637 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5638 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5639 {
5640 unsigned long symndx = ELF64_R_SYM (look->r_info);
5641 asection *sec;
5642
5643 if (symndx < symtab_hdr->sh_info
5644 || elf_sym_hashes (opd_bfd) == NULL)
5645 {
5646 Elf_Internal_Sym *sym;
5647
5648 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5649 if (sym == NULL)
5650 {
5651 size_t symcnt = symtab_hdr->sh_info;
5652 if (elf_sym_hashes (opd_bfd) == NULL)
5653 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5654 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5655 0, NULL, NULL, NULL);
5656 if (sym == NULL)
5657 break;
5658 symtab_hdr->contents = (bfd_byte *) sym;
5659 }
5660
5661 sym += symndx;
5662 val = sym->st_value;
5663 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5664 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5665 }
5666 else
5667 {
5668 struct elf_link_hash_entry **sym_hashes;
5669 struct elf_link_hash_entry *rh;
5670
5671 sym_hashes = elf_sym_hashes (opd_bfd);
5672 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5673 if (rh != NULL)
5674 {
5675 rh = elf_follow_link (rh);
5676 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5677 || rh->root.type == bfd_link_hash_defweak);
5678 val = rh->root.u.def.value;
5679 sec = rh->root.u.def.section;
5680 }
5681 else
5682 {
5683 /* Handle the odd case where we can be called
5684 during bfd_elf_link_add_symbols before the
5685 symbol hashes have been fully populated. */
5686 Elf_Internal_Sym *sym;
5687
5688 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
5689 symndx, NULL, NULL, NULL);
5690 if (sym == NULL)
5691 break;
5692
5693 val = sym->st_value;
5694 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5695 free (sym);
5696 }
5697 }
5698 val += look->r_addend;
5699 if (code_off != NULL)
5700 *code_off = val;
5701 if (code_sec != NULL)
5702 {
5703 if (in_code_sec && *code_sec != sec)
5704 return -1;
5705 else
5706 *code_sec = sec;
5707 }
5708 if (sec != NULL && sec->output_section != NULL)
5709 val += sec->output_section->vma + sec->output_offset;
5710 }
5711 break;
5712 }
5713 }
5714
5715 return val;
5716}
5717
5718/* If the ELF symbol SYM might be a function in SEC, return the
5719 function size and set *CODE_OFF to the function's entry point,
5720 otherwise return zero. */
5721
5722static bfd_size_type
5723ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
5724 bfd_vma *code_off)
5725{
5726 bfd_size_type size;
5727
5728 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
5729 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
5730 return 0;
5731
5732 size = 0;
5733 if (!(sym->flags & BSF_SYNTHETIC))
5734 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
5735
5736 if (strcmp (sym->section->name, ".opd") == 0)
5737 {
5738 if (opd_entry_value (sym->section, sym->value,
5739 &sec, code_off, TRUE) == (bfd_vma) -1)
5740 return 0;
5741 /* An old ABI binary with dot-syms has a size of 24 on the .opd
5742 symbol. This size has nothing to do with the code size of the
5743 function, which is what we're supposed to return, but the
5744 code size isn't available without looking up the dot-sym.
5745 However, doing that would be a waste of time particularly
5746 since elf_find_function will look at the dot-sym anyway.
5747 Now, elf_find_function will keep the largest size of any
5748 function sym found at the code address of interest, so return
5749 1 here to avoid it incorrectly caching a larger function size
5750 for a small function. This does mean we return the wrong
5751 size for a new-ABI function of size 24, but all that does is
5752 disable caching for such functions. */
5753 if (size == 24)
5754 size = 1;
5755 }
5756 else
5757 {
5758 if (sym->section != sec)
5759 return 0;
5760 *code_off = sym->value;
5761 }
5762 if (size == 0)
5763 size = 1;
5764 return size;
5765}
5766
5767/* Return true if symbol is defined in a regular object file. */
5768
5769static bfd_boolean
5770is_static_defined (struct elf_link_hash_entry *h)
5771{
5772 return ((h->root.type == bfd_link_hash_defined
5773 || h->root.type == bfd_link_hash_defweak)
5774 && h->root.u.def.section != NULL
5775 && h->root.u.def.section->output_section != NULL);
5776}
5777
5778/* If FDH is a function descriptor symbol, return the associated code
5779 entry symbol if it is defined. Return NULL otherwise. */
5780
5781static struct ppc_link_hash_entry *
5782defined_code_entry (struct ppc_link_hash_entry *fdh)
5783{
5784 if (fdh->is_func_descriptor)
5785 {
5786 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5787 if (fh->elf.root.type == bfd_link_hash_defined
5788 || fh->elf.root.type == bfd_link_hash_defweak)
5789 return fh;
5790 }
5791 return NULL;
5792}
5793
5794/* If FH is a function code entry symbol, return the associated
5795 function descriptor symbol if it is defined. Return NULL otherwise. */
5796
5797static struct ppc_link_hash_entry *
5798defined_func_desc (struct ppc_link_hash_entry *fh)
5799{
5800 if (fh->oh != NULL
5801 && fh->oh->is_func_descriptor)
5802 {
5803 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5804 if (fdh->elf.root.type == bfd_link_hash_defined
5805 || fdh->elf.root.type == bfd_link_hash_defweak)
5806 return fdh;
5807 }
5808 return NULL;
5809}
5810
5811/* Mark all our entry sym sections, both opd and code section. */
5812
5813static void
5814ppc64_elf_gc_keep (struct bfd_link_info *info)
5815{
5816 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5817 struct bfd_sym_chain *sym;
5818
5819 if (htab == NULL)
5820 return;
5821
5822 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5823 {
5824 struct ppc_link_hash_entry *eh, *fh;
5825 asection *sec;
5826
5827 eh = (struct ppc_link_hash_entry *)
5828 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5829 if (eh == NULL)
5830 continue;
5831 if (eh->elf.root.type != bfd_link_hash_defined
5832 && eh->elf.root.type != bfd_link_hash_defweak)
5833 continue;
5834
5835 fh = defined_code_entry (eh);
5836 if (fh != NULL)
5837 {
5838 sec = fh->elf.root.u.def.section;
5839 sec->flags |= SEC_KEEP;
5840 }
5841 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5842 && opd_entry_value (eh->elf.root.u.def.section,
5843 eh->elf.root.u.def.value,
5844 &sec, NULL, FALSE) != (bfd_vma) -1)
5845 sec->flags |= SEC_KEEP;
5846
5847 sec = eh->elf.root.u.def.section;
5848 sec->flags |= SEC_KEEP;
5849 }
5850}
5851
5852/* Mark sections containing dynamically referenced symbols. When
5853 building shared libraries, we must assume that any visible symbol is
5854 referenced. */
5855
5856static bfd_boolean
5857ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5858{
5859 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5860 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5861 struct ppc_link_hash_entry *fdh;
5862
5863 /* Dynamic linking info is on the func descriptor sym. */
5864 fdh = defined_func_desc (eh);
5865 if (fdh != NULL)
5866 eh = fdh;
5867
5868 if ((eh->elf.root.type == bfd_link_hash_defined
5869 || eh->elf.root.type == bfd_link_hash_defweak)
5870 && (eh->elf.ref_dynamic
5871 || (!info->executable
5872 && eh->elf.def_regular
5873 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5874 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5875 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5876 || !bfd_hide_sym_by_version (info->version_info,
5877 eh->elf.root.root.string)))))
5878 {
5879 asection *code_sec;
5880 struct ppc_link_hash_entry *fh;
5881
5882 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5883
5884 /* Function descriptor syms cause the associated
5885 function code sym section to be marked. */
5886 fh = defined_code_entry (eh);
5887 if (fh != NULL)
5888 {
5889 code_sec = fh->elf.root.u.def.section;
5890 code_sec->flags |= SEC_KEEP;
5891 }
5892 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5893 && opd_entry_value (eh->elf.root.u.def.section,
5894 eh->elf.root.u.def.value,
5895 &code_sec, NULL, FALSE) != (bfd_vma) -1)
5896 code_sec->flags |= SEC_KEEP;
5897 }
5898
5899 return TRUE;
5900}
5901
5902/* Return the section that should be marked against GC for a given
5903 relocation. */
5904
5905static asection *
5906ppc64_elf_gc_mark_hook (asection *sec,
5907 struct bfd_link_info *info,
5908 Elf_Internal_Rela *rel,
5909 struct elf_link_hash_entry *h,
5910 Elf_Internal_Sym *sym)
5911{
5912 asection *rsec;
5913
5914 /* Syms return NULL if we're marking .opd, so we avoid marking all
5915 function sections, as all functions are referenced in .opd. */
5916 rsec = NULL;
5917 if (get_opd_info (sec) != NULL)
5918 return rsec;
5919
5920 if (h != NULL)
5921 {
5922 enum elf_ppc64_reloc_type r_type;
5923 struct ppc_link_hash_entry *eh, *fh, *fdh;
5924
5925 r_type = ELF64_R_TYPE (rel->r_info);
5926 switch (r_type)
5927 {
5928 case R_PPC64_GNU_VTINHERIT:
5929 case R_PPC64_GNU_VTENTRY:
5930 break;
5931
5932 default:
5933 switch (h->root.type)
5934 {
5935 case bfd_link_hash_defined:
5936 case bfd_link_hash_defweak:
5937 eh = (struct ppc_link_hash_entry *) h;
5938 fdh = defined_func_desc (eh);
5939 if (fdh != NULL)
5940 eh = fdh;
5941
5942 /* Function descriptor syms cause the associated
5943 function code sym section to be marked. */
5944 fh = defined_code_entry (eh);
5945 if (fh != NULL)
5946 {
5947 /* They also mark their opd section. */
5948 eh->elf.root.u.def.section->gc_mark = 1;
5949
5950 rsec = fh->elf.root.u.def.section;
5951 }
5952 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5953 && opd_entry_value (eh->elf.root.u.def.section,
5954 eh->elf.root.u.def.value,
5955 &rsec, NULL, FALSE) != (bfd_vma) -1)
5956 eh->elf.root.u.def.section->gc_mark = 1;
5957 else
5958 rsec = h->root.u.def.section;
5959 break;
5960
5961 case bfd_link_hash_common:
5962 rsec = h->root.u.c.p->section;
5963 break;
5964
5965 default:
5966 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5967 }
5968 }
5969 }
5970 else
5971 {
5972 struct _opd_sec_data *opd;
5973
5974 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5975 opd = get_opd_info (rsec);
5976 if (opd != NULL && opd->func_sec != NULL)
5977 {
5978 rsec->gc_mark = 1;
5979
5980 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5981 }
5982 }
5983
5984 return rsec;
5985}
5986
5987/* Update the .got, .plt. and dynamic reloc reference counts for the
5988 section being removed. */
5989
5990static bfd_boolean
5991ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5992 asection *sec, const Elf_Internal_Rela *relocs)
5993{
5994 struct ppc_link_hash_table *htab;
5995 Elf_Internal_Shdr *symtab_hdr;
5996 struct elf_link_hash_entry **sym_hashes;
5997 struct got_entry **local_got_ents;
5998 const Elf_Internal_Rela *rel, *relend;
5999
6000 if (info->relocatable)
6001 return TRUE;
6002
6003 if ((sec->flags & SEC_ALLOC) == 0)
6004 return TRUE;
6005
6006 elf_section_data (sec)->local_dynrel = NULL;
6007
6008 htab = ppc_hash_table (info);
6009 if (htab == NULL)
6010 return FALSE;
6011
6012 symtab_hdr = &elf_symtab_hdr (abfd);
6013 sym_hashes = elf_sym_hashes (abfd);
6014 local_got_ents = elf_local_got_ents (abfd);
6015
6016 relend = relocs + sec->reloc_count;
6017 for (rel = relocs; rel < relend; rel++)
6018 {
6019 unsigned long r_symndx;
6020 enum elf_ppc64_reloc_type r_type;
6021 struct elf_link_hash_entry *h = NULL;
6022 unsigned char tls_type = 0;
6023
6024 r_symndx = ELF64_R_SYM (rel->r_info);
6025 r_type = ELF64_R_TYPE (rel->r_info);
6026 if (r_symndx >= symtab_hdr->sh_info)
6027 {
6028 struct ppc_link_hash_entry *eh;
6029 struct elf_dyn_relocs **pp;
6030 struct elf_dyn_relocs *p;
6031
6032 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6033 h = elf_follow_link (h);
6034 eh = (struct ppc_link_hash_entry *) h;
6035
6036 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6037 if (p->sec == sec)
6038 {
6039 /* Everything must go for SEC. */
6040 *pp = p->next;
6041 break;
6042 }
6043 }
6044
6045 if (is_branch_reloc (r_type))
6046 {
6047 struct plt_entry **ifunc = NULL;
6048 if (h != NULL)
6049 {
6050 if (h->type == STT_GNU_IFUNC)
6051 ifunc = &h->plt.plist;
6052 }
6053 else if (local_got_ents != NULL)
6054 {
6055 struct plt_entry **local_plt = (struct plt_entry **)
6056 (local_got_ents + symtab_hdr->sh_info);
6057 unsigned char *local_got_tls_masks = (unsigned char *)
6058 (local_plt + symtab_hdr->sh_info);
6059 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6060 ifunc = local_plt + r_symndx;
6061 }
6062 if (ifunc != NULL)
6063 {
6064 struct plt_entry *ent;
6065
6066 for (ent = *ifunc; ent != NULL; ent = ent->next)
6067 if (ent->addend == rel->r_addend)
6068 break;
6069 if (ent == NULL)
6070 abort ();
6071 if (ent->plt.refcount > 0)
6072 ent->plt.refcount -= 1;
6073 continue;
6074 }
6075 }
6076
6077 switch (r_type)
6078 {
6079 case R_PPC64_GOT_TLSLD16:
6080 case R_PPC64_GOT_TLSLD16_LO:
6081 case R_PPC64_GOT_TLSLD16_HI:
6082 case R_PPC64_GOT_TLSLD16_HA:
6083 tls_type = TLS_TLS | TLS_LD;
6084 goto dogot;
6085
6086 case R_PPC64_GOT_TLSGD16:
6087 case R_PPC64_GOT_TLSGD16_LO:
6088 case R_PPC64_GOT_TLSGD16_HI:
6089 case R_PPC64_GOT_TLSGD16_HA:
6090 tls_type = TLS_TLS | TLS_GD;
6091 goto dogot;
6092
6093 case R_PPC64_GOT_TPREL16_DS:
6094 case R_PPC64_GOT_TPREL16_LO_DS:
6095 case R_PPC64_GOT_TPREL16_HI:
6096 case R_PPC64_GOT_TPREL16_HA:
6097 tls_type = TLS_TLS | TLS_TPREL;
6098 goto dogot;
6099
6100 case R_PPC64_GOT_DTPREL16_DS:
6101 case R_PPC64_GOT_DTPREL16_LO_DS:
6102 case R_PPC64_GOT_DTPREL16_HI:
6103 case R_PPC64_GOT_DTPREL16_HA:
6104 tls_type = TLS_TLS | TLS_DTPREL;
6105 goto dogot;
6106
6107 case R_PPC64_GOT16:
6108 case R_PPC64_GOT16_DS:
6109 case R_PPC64_GOT16_HA:
6110 case R_PPC64_GOT16_HI:
6111 case R_PPC64_GOT16_LO:
6112 case R_PPC64_GOT16_LO_DS:
6113 dogot:
6114 {
6115 struct got_entry *ent;
6116
6117 if (h != NULL)
6118 ent = h->got.glist;
6119 else
6120 ent = local_got_ents[r_symndx];
6121
6122 for (; ent != NULL; ent = ent->next)
6123 if (ent->addend == rel->r_addend
6124 && ent->owner == abfd
6125 && ent->tls_type == tls_type)
6126 break;
6127 if (ent == NULL)
6128 abort ();
6129 if (ent->got.refcount > 0)
6130 ent->got.refcount -= 1;
6131 }
6132 break;
6133
6134 case R_PPC64_PLT16_HA:
6135 case R_PPC64_PLT16_HI:
6136 case R_PPC64_PLT16_LO:
6137 case R_PPC64_PLT32:
6138 case R_PPC64_PLT64:
6139 case R_PPC64_REL14:
6140 case R_PPC64_REL14_BRNTAKEN:
6141 case R_PPC64_REL14_BRTAKEN:
6142 case R_PPC64_REL24:
6143 if (h != NULL)
6144 {
6145 struct plt_entry *ent;
6146
6147 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6148 if (ent->addend == rel->r_addend)
6149 break;
6150 if (ent != NULL && ent->plt.refcount > 0)
6151 ent->plt.refcount -= 1;
6152 }
6153 break;
6154
6155 default:
6156 break;
6157 }
6158 }
6159 return TRUE;
6160}
6161
6162/* The maximum size of .sfpr. */
6163#define SFPR_MAX (218*4)
6164
6165struct sfpr_def_parms
6166{
6167 const char name[12];
6168 unsigned char lo, hi;
6169 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6170 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6171};
6172
6173/* Auto-generate _save*, _rest* functions in .sfpr. */
6174
6175static bfd_boolean
6176sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6177{
6178 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6179 unsigned int i;
6180 size_t len = strlen (parm->name);
6181 bfd_boolean writing = FALSE;
6182 char sym[16];
6183
6184 if (htab == NULL)
6185 return FALSE;
6186
6187 memcpy (sym, parm->name, len);
6188 sym[len + 2] = 0;
6189
6190 for (i = parm->lo; i <= parm->hi; i++)
6191 {
6192 struct elf_link_hash_entry *h;
6193
6194 sym[len + 0] = i / 10 + '0';
6195 sym[len + 1] = i % 10 + '0';
6196 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6197 if (h != NULL
6198 && !h->def_regular)
6199 {
6200 h->root.type = bfd_link_hash_defined;
6201 h->root.u.def.section = htab->sfpr;
6202 h->root.u.def.value = htab->sfpr->size;
6203 h->type = STT_FUNC;
6204 h->def_regular = 1;
6205 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6206 writing = TRUE;
6207 if (htab->sfpr->contents == NULL)
6208 {
6209 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6210 if (htab->sfpr->contents == NULL)
6211 return FALSE;
6212 }
6213 }
6214 if (writing)
6215 {
6216 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6217 if (i != parm->hi)
6218 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6219 else
6220 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6221 htab->sfpr->size = p - htab->sfpr->contents;
6222 }
6223 }
6224
6225 return TRUE;
6226}
6227
6228static bfd_byte *
6229savegpr0 (bfd *abfd, bfd_byte *p, int r)
6230{
6231 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6232 return p + 4;
6233}
6234
6235static bfd_byte *
6236savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6237{
6238 p = savegpr0 (abfd, p, r);
6239 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6240 p = p + 4;
6241 bfd_put_32 (abfd, BLR, p);
6242 return p + 4;
6243}
6244
6245static bfd_byte *
6246restgpr0 (bfd *abfd, bfd_byte *p, int r)
6247{
6248 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6249 return p + 4;
6250}
6251
6252static bfd_byte *
6253restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6254{
6255 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6256 p = p + 4;
6257 p = restgpr0 (abfd, p, r);
6258 bfd_put_32 (abfd, MTLR_R0, p);
6259 p = p + 4;
6260 if (r == 29)
6261 {
6262 p = restgpr0 (abfd, p, 30);
6263 p = restgpr0 (abfd, p, 31);
6264 }
6265 bfd_put_32 (abfd, BLR, p);
6266 return p + 4;
6267}
6268
6269static bfd_byte *
6270savegpr1 (bfd *abfd, bfd_byte *p, int r)
6271{
6272 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6273 return p + 4;
6274}
6275
6276static bfd_byte *
6277savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6278{
6279 p = savegpr1 (abfd, p, r);
6280 bfd_put_32 (abfd, BLR, p);
6281 return p + 4;
6282}
6283
6284static bfd_byte *
6285restgpr1 (bfd *abfd, bfd_byte *p, int r)
6286{
6287 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6288 return p + 4;
6289}
6290
6291static bfd_byte *
6292restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6293{
6294 p = restgpr1 (abfd, p, r);
6295 bfd_put_32 (abfd, BLR, p);
6296 return p + 4;
6297}
6298
6299static bfd_byte *
6300savefpr (bfd *abfd, bfd_byte *p, int r)
6301{
6302 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6303 return p + 4;
6304}
6305
6306static bfd_byte *
6307savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6308{
6309 p = savefpr (abfd, p, r);
6310 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6311 p = p + 4;
6312 bfd_put_32 (abfd, BLR, p);
6313 return p + 4;
6314}
6315
6316static bfd_byte *
6317restfpr (bfd *abfd, bfd_byte *p, int r)
6318{
6319 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6320 return p + 4;
6321}
6322
6323static bfd_byte *
6324restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6325{
6326 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6327 p = p + 4;
6328 p = restfpr (abfd, p, r);
6329 bfd_put_32 (abfd, MTLR_R0, p);
6330 p = p + 4;
6331 if (r == 29)
6332 {
6333 p = restfpr (abfd, p, 30);
6334 p = restfpr (abfd, p, 31);
6335 }
6336 bfd_put_32 (abfd, BLR, p);
6337 return p + 4;
6338}
6339
6340static bfd_byte *
6341savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6342{
6343 p = savefpr (abfd, p, r);
6344 bfd_put_32 (abfd, BLR, p);
6345 return p + 4;
6346}
6347
6348static bfd_byte *
6349restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6350{
6351 p = restfpr (abfd, p, r);
6352 bfd_put_32 (abfd, BLR, p);
6353 return p + 4;
6354}
6355
6356static bfd_byte *
6357savevr (bfd *abfd, bfd_byte *p, int r)
6358{
6359 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6360 p = p + 4;
6361 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6362 return p + 4;
6363}
6364
6365static bfd_byte *
6366savevr_tail (bfd *abfd, bfd_byte *p, int r)
6367{
6368 p = savevr (abfd, p, r);
6369 bfd_put_32 (abfd, BLR, p);
6370 return p + 4;
6371}
6372
6373static bfd_byte *
6374restvr (bfd *abfd, bfd_byte *p, int r)
6375{
6376 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6377 p = p + 4;
6378 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6379 return p + 4;
6380}
6381
6382static bfd_byte *
6383restvr_tail (bfd *abfd, bfd_byte *p, int r)
6384{
6385 p = restvr (abfd, p, r);
6386 bfd_put_32 (abfd, BLR, p);
6387 return p + 4;
6388}
6389
6390/* Called via elf_link_hash_traverse to transfer dynamic linking
6391 information on function code symbol entries to their corresponding
6392 function descriptor symbol entries. */
6393
6394static bfd_boolean
6395func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6396{
6397 struct bfd_link_info *info;
6398 struct ppc_link_hash_table *htab;
6399 struct plt_entry *ent;
6400 struct ppc_link_hash_entry *fh;
6401 struct ppc_link_hash_entry *fdh;
6402 bfd_boolean force_local;
6403
6404 fh = (struct ppc_link_hash_entry *) h;
6405 if (fh->elf.root.type == bfd_link_hash_indirect)
6406 return TRUE;
6407
6408 info = inf;
6409 htab = ppc_hash_table (info);
6410 if (htab == NULL)
6411 return FALSE;
6412
6413 /* Resolve undefined references to dot-symbols as the value
6414 in the function descriptor, if we have one in a regular object.
6415 This is to satisfy cases like ".quad .foo". Calls to functions
6416 in dynamic objects are handled elsewhere. */
6417 if (fh->elf.root.type == bfd_link_hash_undefweak
6418 && fh->was_undefined
6419 && (fdh = defined_func_desc (fh)) != NULL
6420 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6421 && opd_entry_value (fdh->elf.root.u.def.section,
6422 fdh->elf.root.u.def.value,
6423 &fh->elf.root.u.def.section,
6424 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6425 {
6426 fh->elf.root.type = fdh->elf.root.type;
6427 fh->elf.forced_local = 1;
6428 fh->elf.def_regular = fdh->elf.def_regular;
6429 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6430 }
6431
6432 /* If this is a function code symbol, transfer dynamic linking
6433 information to the function descriptor symbol. */
6434 if (!fh->is_func)
6435 return TRUE;
6436
6437 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6438 if (ent->plt.refcount > 0)
6439 break;
6440 if (ent == NULL
6441 || fh->elf.root.root.string[0] != '.'
6442 || fh->elf.root.root.string[1] == '\0')
6443 return TRUE;
6444
6445 /* Find the corresponding function descriptor symbol. Create it
6446 as undefined if necessary. */
6447
6448 fdh = lookup_fdh (fh, htab);
6449 if (fdh == NULL
6450 && !info->executable
6451 && (fh->elf.root.type == bfd_link_hash_undefined
6452 || fh->elf.root.type == bfd_link_hash_undefweak))
6453 {
6454 fdh = make_fdh (info, fh);
6455 if (fdh == NULL)
6456 return FALSE;
6457 }
6458
6459 /* Fake function descriptors are made undefweak. If the function
6460 code symbol is strong undefined, make the fake sym the same.
6461 If the function code symbol is defined, then force the fake
6462 descriptor local; We can't support overriding of symbols in a
6463 shared library on a fake descriptor. */
6464
6465 if (fdh != NULL
6466 && fdh->fake
6467 && fdh->elf.root.type == bfd_link_hash_undefweak)
6468 {
6469 if (fh->elf.root.type == bfd_link_hash_undefined)
6470 {
6471 fdh->elf.root.type = bfd_link_hash_undefined;
6472 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6473 }
6474 else if (fh->elf.root.type == bfd_link_hash_defined
6475 || fh->elf.root.type == bfd_link_hash_defweak)
6476 {
6477 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6478 }
6479 }
6480
6481 if (fdh != NULL
6482 && !fdh->elf.forced_local
6483 && (!info->executable
6484 || fdh->elf.def_dynamic
6485 || fdh->elf.ref_dynamic
6486 || (fdh->elf.root.type == bfd_link_hash_undefweak
6487 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6488 {
6489 if (fdh->elf.dynindx == -1)
6490 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6491 return FALSE;
6492 fdh->elf.ref_regular |= fh->elf.ref_regular;
6493 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6494 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6495 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6496 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6497 {
6498 move_plt_plist (fh, fdh);
6499 fdh->elf.needs_plt = 1;
6500 }
6501 fdh->is_func_descriptor = 1;
6502 fdh->oh = fh;
6503 fh->oh = fdh;
6504 }
6505
6506 /* Now that the info is on the function descriptor, clear the
6507 function code sym info. Any function code syms for which we
6508 don't have a definition in a regular file, we force local.
6509 This prevents a shared library from exporting syms that have
6510 been imported from another library. Function code syms that
6511 are really in the library we must leave global to prevent the
6512 linker dragging in a definition from a static library. */
6513 force_local = (!fh->elf.def_regular
6514 || fdh == NULL
6515 || !fdh->elf.def_regular
6516 || fdh->elf.forced_local);
6517 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6518
6519 return TRUE;
6520}
6521
6522/* Called near the start of bfd_elf_size_dynamic_sections. We use
6523 this hook to a) provide some gcc support functions, and b) transfer
6524 dynamic linking information gathered so far on function code symbol
6525 entries, to their corresponding function descriptor symbol entries. */
6526
6527static bfd_boolean
6528ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6529 struct bfd_link_info *info)
6530{
6531 struct ppc_link_hash_table *htab;
6532 unsigned int i;
6533 static const struct sfpr_def_parms funcs[] =
6534 {
6535 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6536 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6537 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6538 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6539 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6540 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6541 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6542 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6543 { "._savef", 14, 31, savefpr, savefpr1_tail },
6544 { "._restf", 14, 31, restfpr, restfpr1_tail },
6545 { "_savevr_", 20, 31, savevr, savevr_tail },
6546 { "_restvr_", 20, 31, restvr, restvr_tail }
6547 };
6548
6549 htab = ppc_hash_table (info);
6550 if (htab == NULL)
6551 return FALSE;
6552
6553 if (htab->sfpr == NULL)
6554 /* We don't have any relocs. */
6555 return TRUE;
6556
6557 /* Provide any missing _save* and _rest* functions. */
6558 htab->sfpr->size = 0;
6559 if (!info->relocatable)
6560 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6561 if (!sfpr_define (info, &funcs[i]))
6562 return FALSE;
6563
6564 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6565
6566 if (htab->sfpr->size == 0)
6567 htab->sfpr->flags |= SEC_EXCLUDE;
6568
6569 return TRUE;
6570}
6571
6572/* Adjust a symbol defined by a dynamic object and referenced by a
6573 regular object. The current definition is in some section of the
6574 dynamic object, but we're not including those sections. We have to
6575 change the definition to something the rest of the link can
6576 understand. */
6577
6578static bfd_boolean
6579ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6580 struct elf_link_hash_entry *h)
6581{
6582 struct ppc_link_hash_table *htab;
6583 asection *s;
6584
6585 htab = ppc_hash_table (info);
6586 if (htab == NULL)
6587 return FALSE;
6588
6589 /* Deal with function syms. */
6590 if (h->type == STT_FUNC
6591 || h->type == STT_GNU_IFUNC
6592 || h->needs_plt)
6593 {
6594 /* Clear procedure linkage table information for any symbol that
6595 won't need a .plt entry. */
6596 struct plt_entry *ent;
6597 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6598 if (ent->plt.refcount > 0)
6599 break;
6600 if (ent == NULL
6601 || (h->type != STT_GNU_IFUNC
6602 && (SYMBOL_CALLS_LOCAL (info, h)
6603 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6604 && h->root.type == bfd_link_hash_undefweak))))
6605 {
6606 h->plt.plist = NULL;
6607 h->needs_plt = 0;
6608 }
6609 }
6610 else
6611 h->plt.plist = NULL;
6612
6613 /* If this is a weak symbol, and there is a real definition, the
6614 processor independent code will have arranged for us to see the
6615 real definition first, and we can just use the same value. */
6616 if (h->u.weakdef != NULL)
6617 {
6618 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6619 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6620 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6621 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6622 if (ELIMINATE_COPY_RELOCS)
6623 h->non_got_ref = h->u.weakdef->non_got_ref;
6624 return TRUE;
6625 }
6626
6627 /* If we are creating a shared library, we must presume that the
6628 only references to the symbol are via the global offset table.
6629 For such cases we need not do anything here; the relocations will
6630 be handled correctly by relocate_section. */
6631 if (info->shared)
6632 return TRUE;
6633
6634 /* If there are no references to this symbol that do not use the
6635 GOT, we don't need to generate a copy reloc. */
6636 if (!h->non_got_ref)
6637 return TRUE;
6638
6639 /* Don't generate a copy reloc for symbols defined in the executable. */
6640 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6641 return TRUE;
6642
6643 if (ELIMINATE_COPY_RELOCS)
6644 {
6645 struct ppc_link_hash_entry * eh;
6646 struct elf_dyn_relocs *p;
6647
6648 eh = (struct ppc_link_hash_entry *) h;
6649 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6650 {
6651 s = p->sec->output_section;
6652 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6653 break;
6654 }
6655
6656 /* If we didn't find any dynamic relocs in read-only sections, then
6657 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6658 if (p == NULL)
6659 {
6660 h->non_got_ref = 0;
6661 return TRUE;
6662 }
6663 }
6664
6665 if (h->plt.plist != NULL)
6666 {
6667 /* We should never get here, but unfortunately there are versions
6668 of gcc out there that improperly (for this ABI) put initialized
6669 function pointers, vtable refs and suchlike in read-only
6670 sections. Allow them to proceed, but warn that this might
6671 break at runtime. */
6672 info->callbacks->einfo
6673 (_("%P: copy reloc against `%T' requires lazy plt linking; "
6674 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6675 h->root.root.string);
6676 }
6677
6678 /* This is a reference to a symbol defined by a dynamic object which
6679 is not a function. */
6680
6681 /* We must allocate the symbol in our .dynbss section, which will
6682 become part of the .bss section of the executable. There will be
6683 an entry for this symbol in the .dynsym section. The dynamic
6684 object will contain position independent code, so all references
6685 from the dynamic object to this symbol will go through the global
6686 offset table. The dynamic linker will use the .dynsym entry to
6687 determine the address it must put in the global offset table, so
6688 both the dynamic object and the regular object will refer to the
6689 same memory location for the variable. */
6690
6691 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6692 to copy the initial value out of the dynamic object and into the
6693 runtime process image. We need to remember the offset into the
6694 .rela.bss section we are going to use. */
6695 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6696 {
6697 htab->relbss->size += sizeof (Elf64_External_Rela);
6698 h->needs_copy = 1;
6699 }
6700
6701 s = htab->dynbss;
6702
6703 return _bfd_elf_adjust_dynamic_copy (h, s);
6704}
6705
6706/* If given a function descriptor symbol, hide both the function code
6707 sym and the descriptor. */
6708static void
6709ppc64_elf_hide_symbol (struct bfd_link_info *info,
6710 struct elf_link_hash_entry *h,
6711 bfd_boolean force_local)
6712{
6713 struct ppc_link_hash_entry *eh;
6714 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6715
6716 eh = (struct ppc_link_hash_entry *) h;
6717 if (eh->is_func_descriptor)
6718 {
6719 struct ppc_link_hash_entry *fh = eh->oh;
6720
6721 if (fh == NULL)
6722 {
6723 const char *p, *q;
6724 struct ppc_link_hash_table *htab;
6725 char save;
6726
6727 /* We aren't supposed to use alloca in BFD because on
6728 systems which do not have alloca the version in libiberty
6729 calls xmalloc, which might cause the program to crash
6730 when it runs out of memory. This function doesn't have a
6731 return status, so there's no way to gracefully return an
6732 error. So cheat. We know that string[-1] can be safely
6733 accessed; It's either a string in an ELF string table,
6734 or allocated in an objalloc structure. */
6735
6736 p = eh->elf.root.root.string - 1;
6737 save = *p;
6738 *(char *) p = '.';
6739 htab = ppc_hash_table (info);
6740 if (htab == NULL)
6741 return;
6742
6743 fh = (struct ppc_link_hash_entry *)
6744 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6745 *(char *) p = save;
6746
6747 /* Unfortunately, if it so happens that the string we were
6748 looking for was allocated immediately before this string,
6749 then we overwrote the string terminator. That's the only
6750 reason the lookup should fail. */
6751 if (fh == NULL)
6752 {
6753 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6754 while (q >= eh->elf.root.root.string && *q == *p)
6755 --q, --p;
6756 if (q < eh->elf.root.root.string && *p == '.')
6757 fh = (struct ppc_link_hash_entry *)
6758 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6759 }
6760 if (fh != NULL)
6761 {
6762 eh->oh = fh;
6763 fh->oh = eh;
6764 }
6765 }
6766 if (fh != NULL)
6767 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6768 }
6769}
6770
6771static bfd_boolean
6772get_sym_h (struct elf_link_hash_entry **hp,
6773 Elf_Internal_Sym **symp,
6774 asection **symsecp,
6775 unsigned char **tls_maskp,
6776 Elf_Internal_Sym **locsymsp,
6777 unsigned long r_symndx,
6778 bfd *ibfd)
6779{
6780 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6781
6782 if (r_symndx >= symtab_hdr->sh_info)
6783 {
6784 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6785 struct elf_link_hash_entry *h;
6786
6787 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6788 h = elf_follow_link (h);
6789
6790 if (hp != NULL)
6791 *hp = h;
6792
6793 if (symp != NULL)
6794 *symp = NULL;
6795
6796 if (symsecp != NULL)
6797 {
6798 asection *symsec = NULL;
6799 if (h->root.type == bfd_link_hash_defined
6800 || h->root.type == bfd_link_hash_defweak)
6801 symsec = h->root.u.def.section;
6802 *symsecp = symsec;
6803 }
6804
6805 if (tls_maskp != NULL)
6806 {
6807 struct ppc_link_hash_entry *eh;
6808
6809 eh = (struct ppc_link_hash_entry *) h;
6810 *tls_maskp = &eh->tls_mask;
6811 }
6812 }
6813 else
6814 {
6815 Elf_Internal_Sym *sym;
6816 Elf_Internal_Sym *locsyms = *locsymsp;
6817
6818 if (locsyms == NULL)
6819 {
6820 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6821 if (locsyms == NULL)
6822 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6823 symtab_hdr->sh_info,
6824 0, NULL, NULL, NULL);
6825 if (locsyms == NULL)
6826 return FALSE;
6827 *locsymsp = locsyms;
6828 }
6829 sym = locsyms + r_symndx;
6830
6831 if (hp != NULL)
6832 *hp = NULL;
6833
6834 if (symp != NULL)
6835 *symp = sym;
6836
6837 if (symsecp != NULL)
6838 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6839
6840 if (tls_maskp != NULL)
6841 {
6842 struct got_entry **lgot_ents;
6843 unsigned char *tls_mask;
6844
6845 tls_mask = NULL;
6846 lgot_ents = elf_local_got_ents (ibfd);
6847 if (lgot_ents != NULL)
6848 {
6849 struct plt_entry **local_plt = (struct plt_entry **)
6850 (lgot_ents + symtab_hdr->sh_info);
6851 unsigned char *lgot_masks = (unsigned char *)
6852 (local_plt + symtab_hdr->sh_info);
6853 tls_mask = &lgot_masks[r_symndx];
6854 }
6855 *tls_maskp = tls_mask;
6856 }
6857 }
6858 return TRUE;
6859}
6860
6861/* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6862 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6863 type suitable for optimization, and 1 otherwise. */
6864
6865static int
6866get_tls_mask (unsigned char **tls_maskp,
6867 unsigned long *toc_symndx,
6868 bfd_vma *toc_addend,
6869 Elf_Internal_Sym **locsymsp,
6870 const Elf_Internal_Rela *rel,
6871 bfd *ibfd)
6872{
6873 unsigned long r_symndx;
6874 int next_r;
6875 struct elf_link_hash_entry *h;
6876 Elf_Internal_Sym *sym;
6877 asection *sec;
6878 bfd_vma off;
6879
6880 r_symndx = ELF64_R_SYM (rel->r_info);
6881 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6882 return 0;
6883
6884 if ((*tls_maskp != NULL && **tls_maskp != 0)
6885 || sec == NULL
6886 || ppc64_elf_section_data (sec) == NULL
6887 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6888 return 1;
6889
6890 /* Look inside a TOC section too. */
6891 if (h != NULL)
6892 {
6893 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6894 off = h->root.u.def.value;
6895 }
6896 else
6897 off = sym->st_value;
6898 off += rel->r_addend;
6899 BFD_ASSERT (off % 8 == 0);
6900 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6901 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6902 if (toc_symndx != NULL)
6903 *toc_symndx = r_symndx;
6904 if (toc_addend != NULL)
6905 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6906 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6907 return 0;
6908 if ((h == NULL || is_static_defined (h))
6909 && (next_r == -1 || next_r == -2))
6910 return 1 - next_r;
6911 return 1;
6912}
6913
6914/* Find (or create) an entry in the tocsave hash table. */
6915
6916static struct tocsave_entry *
6917tocsave_find (struct ppc_link_hash_table *htab,
6918 enum insert_option insert,
6919 Elf_Internal_Sym **local_syms,
6920 const Elf_Internal_Rela *irela,
6921 bfd *ibfd)
6922{
6923 unsigned long r_indx;
6924 struct elf_link_hash_entry *h;
6925 Elf_Internal_Sym *sym;
6926 struct tocsave_entry ent, *p;
6927 hashval_t hash;
6928 struct tocsave_entry **slot;
6929
6930 r_indx = ELF64_R_SYM (irela->r_info);
6931 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6932 return NULL;
6933 if (ent.sec == NULL || ent.sec->output_section == NULL)
6934 {
6935 (*_bfd_error_handler)
6936 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6937 return NULL;
6938 }
6939
6940 if (h != NULL)
6941 ent.offset = h->root.u.def.value;
6942 else
6943 ent.offset = sym->st_value;
6944 ent.offset += irela->r_addend;
6945
6946 hash = tocsave_htab_hash (&ent);
6947 slot = ((struct tocsave_entry **)
6948 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6949 if (slot == NULL)
6950 return NULL;
6951
6952 if (*slot == NULL)
6953 {
6954 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6955 if (p == NULL)
6956 return NULL;
6957 *p = ent;
6958 *slot = p;
6959 }
6960 return *slot;
6961}
6962
6963/* Adjust all global syms defined in opd sections. In gcc generated
6964 code for the old ABI, these will already have been done. */
6965
6966static bfd_boolean
6967adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6968{
6969 struct ppc_link_hash_entry *eh;
6970 asection *sym_sec;
6971 struct _opd_sec_data *opd;
6972
6973 if (h->root.type == bfd_link_hash_indirect)
6974 return TRUE;
6975
6976 if (h->root.type != bfd_link_hash_defined
6977 && h->root.type != bfd_link_hash_defweak)
6978 return TRUE;
6979
6980 eh = (struct ppc_link_hash_entry *) h;
6981 if (eh->adjust_done)
6982 return TRUE;
6983
6984 sym_sec = eh->elf.root.u.def.section;
6985 opd = get_opd_info (sym_sec);
6986 if (opd != NULL && opd->adjust != NULL)
6987 {
6988 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6989 if (adjust == -1)
6990 {
6991 /* This entry has been deleted. */
6992 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6993 if (dsec == NULL)
6994 {
6995 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6996 if (discarded_section (dsec))
6997 {
6998 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6999 break;
7000 }
7001 }
7002 eh->elf.root.u.def.value = 0;
7003 eh->elf.root.u.def.section = dsec;
7004 }
7005 else
7006 eh->elf.root.u.def.value += adjust;
7007 eh->adjust_done = 1;
7008 }
7009 return TRUE;
7010}
7011
7012/* Handles decrementing dynamic reloc counts for the reloc specified by
7013 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7014 have already been determined. */
7015
7016static bfd_boolean
7017dec_dynrel_count (bfd_vma r_info,
7018 asection *sec,
7019 struct bfd_link_info *info,
7020 Elf_Internal_Sym **local_syms,
7021 struct elf_link_hash_entry *h,
7022 Elf_Internal_Sym *sym)
7023{
7024 enum elf_ppc64_reloc_type r_type;
7025 asection *sym_sec = NULL;
7026
7027 /* Can this reloc be dynamic? This switch, and later tests here
7028 should be kept in sync with the code in check_relocs. */
7029 r_type = ELF64_R_TYPE (r_info);
7030 switch (r_type)
7031 {
7032 default:
7033 return TRUE;
7034
7035 case R_PPC64_TPREL16:
7036 case R_PPC64_TPREL16_LO:
7037 case R_PPC64_TPREL16_HI:
7038 case R_PPC64_TPREL16_HA:
7039 case R_PPC64_TPREL16_DS:
7040 case R_PPC64_TPREL16_LO_DS:
7041 case R_PPC64_TPREL16_HIGHER:
7042 case R_PPC64_TPREL16_HIGHERA:
7043 case R_PPC64_TPREL16_HIGHEST:
7044 case R_PPC64_TPREL16_HIGHESTA:
7045 if (!info->shared)
7046 return TRUE;
7047
7048 case R_PPC64_TPREL64:
7049 case R_PPC64_DTPMOD64:
7050 case R_PPC64_DTPREL64:
7051 case R_PPC64_ADDR64:
7052 case R_PPC64_REL30:
7053 case R_PPC64_REL32:
7054 case R_PPC64_REL64:
7055 case R_PPC64_ADDR14:
7056 case R_PPC64_ADDR14_BRNTAKEN:
7057 case R_PPC64_ADDR14_BRTAKEN:
7058 case R_PPC64_ADDR16:
7059 case R_PPC64_ADDR16_DS:
7060 case R_PPC64_ADDR16_HA:
7061 case R_PPC64_ADDR16_HI:
7062 case R_PPC64_ADDR16_HIGHER:
7063 case R_PPC64_ADDR16_HIGHERA:
7064 case R_PPC64_ADDR16_HIGHEST:
7065 case R_PPC64_ADDR16_HIGHESTA:
7066 case R_PPC64_ADDR16_LO:
7067 case R_PPC64_ADDR16_LO_DS:
7068 case R_PPC64_ADDR24:
7069 case R_PPC64_ADDR32:
7070 case R_PPC64_UADDR16:
7071 case R_PPC64_UADDR32:
7072 case R_PPC64_UADDR64:
7073 case R_PPC64_TOC:
7074 break;
7075 }
7076
7077 if (local_syms != NULL)
7078 {
7079 unsigned long r_symndx;
7080 bfd *ibfd = sec->owner;
7081
7082 r_symndx = ELF64_R_SYM (r_info);
7083 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7084 return FALSE;
7085 }
7086
7087 if ((info->shared
7088 && (must_be_dyn_reloc (info, r_type)
7089 || (h != NULL
7090 && (!SYMBOLIC_BIND (info, h)
7091 || h->root.type == bfd_link_hash_defweak
7092 || !h->def_regular))))
7093 || (ELIMINATE_COPY_RELOCS
7094 && !info->shared
7095 && h != NULL
7096 && (h->root.type == bfd_link_hash_defweak
7097 || !h->def_regular)))
7098 ;
7099 else
7100 return TRUE;
7101
7102 if (h != NULL)
7103 {
7104 struct elf_dyn_relocs *p;
7105 struct elf_dyn_relocs **pp;
7106 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7107
7108 /* elf_gc_sweep may have already removed all dyn relocs associated
7109 with local syms for a given section. Also, symbol flags are
7110 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7111 report a dynreloc miscount. */
7112 if (*pp == NULL && info->gc_sections)
7113 return TRUE;
7114
7115 while ((p = *pp) != NULL)
7116 {
7117 if (p->sec == sec)
7118 {
7119 if (!must_be_dyn_reloc (info, r_type))
7120 p->pc_count -= 1;
7121 p->count -= 1;
7122 if (p->count == 0)
7123 *pp = p->next;
7124 return TRUE;
7125 }
7126 pp = &p->next;
7127 }
7128 }
7129 else
7130 {
7131 struct ppc_dyn_relocs *p;
7132 struct ppc_dyn_relocs **pp;
7133 void *vpp;
7134 bfd_boolean is_ifunc;
7135
7136 if (local_syms == NULL)
7137 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7138 if (sym_sec == NULL)
7139 sym_sec = sec;
7140
7141 vpp = &elf_section_data (sym_sec)->local_dynrel;
7142 pp = (struct ppc_dyn_relocs **) vpp;
7143
7144 if (*pp == NULL && info->gc_sections)
7145 return TRUE;
7146
7147 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7148 while ((p = *pp) != NULL)
7149 {
7150 if (p->sec == sec && p->ifunc == is_ifunc)
7151 {
7152 p->count -= 1;
7153 if (p->count == 0)
7154 *pp = p->next;
7155 return TRUE;
7156 }
7157 pp = &p->next;
7158 }
7159 }
7160
7161 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7162 sec->owner, sec);
7163 bfd_set_error (bfd_error_bad_value);
7164 return FALSE;
7165}
7166
7167/* Remove unused Official Procedure Descriptor entries. Currently we
7168 only remove those associated with functions in discarded link-once
7169 sections, or weakly defined functions that have been overridden. It
7170 would be possible to remove many more entries for statically linked
7171 applications. */
7172
7173bfd_boolean
7174ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7175{
7176 bfd *ibfd;
7177 bfd_boolean some_edited = FALSE;
7178 asection *need_pad = NULL;
7179
7180 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7181 {
7182 asection *sec;
7183 Elf_Internal_Rela *relstart, *rel, *relend;
7184 Elf_Internal_Shdr *symtab_hdr;
7185 Elf_Internal_Sym *local_syms;
7186 bfd_vma offset;
7187 struct _opd_sec_data *opd;
7188 bfd_boolean need_edit, add_aux_fields;
7189 bfd_size_type cnt_16b = 0;
7190
7191 if (!is_ppc64_elf (ibfd))
7192 continue;
7193
7194 sec = bfd_get_section_by_name (ibfd, ".opd");
7195 if (sec == NULL || sec->size == 0)
7196 continue;
7197
7198 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7199 continue;
7200
7201 if (sec->output_section == bfd_abs_section_ptr)
7202 continue;
7203
7204 /* Look through the section relocs. */
7205 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7206 continue;
7207
7208 local_syms = NULL;
7209 symtab_hdr = &elf_symtab_hdr (ibfd);
7210
7211 /* Read the relocations. */
7212 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7213 info->keep_memory);
7214 if (relstart == NULL)
7215 return FALSE;
7216
7217 /* First run through the relocs to check they are sane, and to
7218 determine whether we need to edit this opd section. */
7219 need_edit = FALSE;
7220 need_pad = sec;
7221 offset = 0;
7222 relend = relstart + sec->reloc_count;
7223 for (rel = relstart; rel < relend; )
7224 {
7225 enum elf_ppc64_reloc_type r_type;
7226 unsigned long r_symndx;
7227 asection *sym_sec;
7228 struct elf_link_hash_entry *h;
7229 Elf_Internal_Sym *sym;
7230
7231 /* .opd contains a regular array of 16 or 24 byte entries. We're
7232 only interested in the reloc pointing to a function entry
7233 point. */
7234 if (rel->r_offset != offset
7235 || rel + 1 >= relend
7236 || (rel + 1)->r_offset != offset + 8)
7237 {
7238 /* If someone messes with .opd alignment then after a
7239 "ld -r" we might have padding in the middle of .opd.
7240 Also, there's nothing to prevent someone putting
7241 something silly in .opd with the assembler. No .opd
7242 optimization for them! */
7243 broken_opd:
7244 (*_bfd_error_handler)
7245 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7246 need_edit = FALSE;
7247 break;
7248 }
7249
7250 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7251 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7252 {
7253 (*_bfd_error_handler)
7254 (_("%B: unexpected reloc type %u in .opd section"),
7255 ibfd, r_type);
7256 need_edit = FALSE;
7257 break;
7258 }
7259
7260 r_symndx = ELF64_R_SYM (rel->r_info);
7261 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7262 r_symndx, ibfd))
7263 goto error_ret;
7264
7265 if (sym_sec == NULL || sym_sec->owner == NULL)
7266 {
7267 const char *sym_name;
7268 if (h != NULL)
7269 sym_name = h->root.root.string;
7270 else
7271 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7272 sym_sec);
7273
7274 (*_bfd_error_handler)
7275 (_("%B: undefined sym `%s' in .opd section"),
7276 ibfd, sym_name);
7277 need_edit = FALSE;
7278 break;
7279 }
7280
7281 /* opd entries are always for functions defined in the
7282 current input bfd. If the symbol isn't defined in the
7283 input bfd, then we won't be using the function in this
7284 bfd; It must be defined in a linkonce section in another
7285 bfd, or is weak. It's also possible that we are
7286 discarding the function due to a linker script /DISCARD/,
7287 which we test for via the output_section. */
7288 if (sym_sec->owner != ibfd
7289 || sym_sec->output_section == bfd_abs_section_ptr)
7290 need_edit = TRUE;
7291
7292 rel += 2;
7293 if (rel == relend
7294 || (rel + 1 == relend && rel->r_offset == offset + 16))
7295 {
7296 if (sec->size == offset + 24)
7297 {
7298 need_pad = NULL;
7299 break;
7300 }
7301 if (rel == relend && sec->size == offset + 16)
7302 {
7303 cnt_16b++;
7304 break;
7305 }
7306 goto broken_opd;
7307 }
7308
7309 if (rel->r_offset == offset + 24)
7310 offset += 24;
7311 else if (rel->r_offset != offset + 16)
7312 goto broken_opd;
7313 else if (rel + 1 < relend
7314 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7315 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7316 {
7317 offset += 16;
7318 cnt_16b++;
7319 }
7320 else if (rel + 2 < relend
7321 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7322 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7323 {
7324 offset += 24;
7325 rel += 1;
7326 }
7327 else
7328 goto broken_opd;
7329 }
7330
7331 add_aux_fields = non_overlapping && cnt_16b > 0;
7332
7333 if (need_edit || add_aux_fields)
7334 {
7335 Elf_Internal_Rela *write_rel;
7336 Elf_Internal_Shdr *rel_hdr;
7337 bfd_byte *rptr, *wptr;
7338 bfd_byte *new_contents;
7339 bfd_boolean skip;
7340 long opd_ent_size;
7341 bfd_size_type amt;
7342
7343 new_contents = NULL;
7344 amt = sec->size * sizeof (long) / 8;
7345 opd = &ppc64_elf_section_data (sec)->u.opd;
7346 opd->adjust = bfd_zalloc (sec->owner, amt);
7347 if (opd->adjust == NULL)
7348 return FALSE;
7349 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7350
7351 /* This seems a waste of time as input .opd sections are all
7352 zeros as generated by gcc, but I suppose there's no reason
7353 this will always be so. We might start putting something in
7354 the third word of .opd entries. */
7355 if ((sec->flags & SEC_IN_MEMORY) == 0)
7356 {
7357 bfd_byte *loc;
7358 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7359 {
7360 if (loc != NULL)
7361 free (loc);
7362 error_ret:
7363 if (local_syms != NULL
7364 && symtab_hdr->contents != (unsigned char *) local_syms)
7365 free (local_syms);
7366 if (elf_section_data (sec)->relocs != relstart)
7367 free (relstart);
7368 return FALSE;
7369 }
7370 sec->contents = loc;
7371 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7372 }
7373
7374 elf_section_data (sec)->relocs = relstart;
7375
7376 new_contents = sec->contents;
7377 if (add_aux_fields)
7378 {
7379 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7380 if (new_contents == NULL)
7381 return FALSE;
7382 need_pad = FALSE;
7383 }
7384 wptr = new_contents;
7385 rptr = sec->contents;
7386
7387 write_rel = relstart;
7388 skip = FALSE;
7389 offset = 0;
7390 opd_ent_size = 0;
7391 for (rel = relstart; rel < relend; rel++)
7392 {
7393 unsigned long r_symndx;
7394 asection *sym_sec;
7395 struct elf_link_hash_entry *h;
7396 Elf_Internal_Sym *sym;
7397
7398 r_symndx = ELF64_R_SYM (rel->r_info);
7399 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7400 r_symndx, ibfd))
7401 goto error_ret;
7402
7403 if (rel->r_offset == offset)
7404 {
7405 struct ppc_link_hash_entry *fdh = NULL;
7406
7407 /* See if the .opd entry is full 24 byte or
7408 16 byte (with fd_aux entry overlapped with next
7409 fd_func). */
7410 opd_ent_size = 24;
7411 if ((rel + 2 == relend && sec->size == offset + 16)
7412 || (rel + 3 < relend
7413 && rel[2].r_offset == offset + 16
7414 && rel[3].r_offset == offset + 24
7415 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7416 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7417 opd_ent_size = 16;
7418
7419 if (h != NULL
7420 && h->root.root.string[0] == '.')
7421 {
7422 struct ppc_link_hash_table *htab;
7423
7424 htab = ppc_hash_table (info);
7425 if (htab != NULL)
7426 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7427 htab);
7428 if (fdh != NULL
7429 && fdh->elf.root.type != bfd_link_hash_defined
7430 && fdh->elf.root.type != bfd_link_hash_defweak)
7431 fdh = NULL;
7432 }
7433
7434 skip = (sym_sec->owner != ibfd
7435 || sym_sec->output_section == bfd_abs_section_ptr);
7436 if (skip)
7437 {
7438 if (fdh != NULL && sym_sec->owner == ibfd)
7439 {
7440 /* Arrange for the function descriptor sym
7441 to be dropped. */
7442 fdh->elf.root.u.def.value = 0;
7443 fdh->elf.root.u.def.section = sym_sec;
7444 }
7445 opd->adjust[rel->r_offset / 8] = -1;
7446 }
7447 else
7448 {
7449 /* We'll be keeping this opd entry. */
7450
7451 if (fdh != NULL)
7452 {
7453 /* Redefine the function descriptor symbol to
7454 this location in the opd section. It is
7455 necessary to update the value here rather
7456 than using an array of adjustments as we do
7457 for local symbols, because various places
7458 in the generic ELF code use the value
7459 stored in u.def.value. */
7460 fdh->elf.root.u.def.value = wptr - new_contents;
7461 fdh->adjust_done = 1;
7462 }
7463
7464 /* Local syms are a bit tricky. We could
7465 tweak them as they can be cached, but
7466 we'd need to look through the local syms
7467 for the function descriptor sym which we
7468 don't have at the moment. So keep an
7469 array of adjustments. */
7470 opd->adjust[rel->r_offset / 8]
7471 = (wptr - new_contents) - (rptr - sec->contents);
7472
7473 if (wptr != rptr)
7474 memcpy (wptr, rptr, opd_ent_size);
7475 wptr += opd_ent_size;
7476 if (add_aux_fields && opd_ent_size == 16)
7477 {
7478 memset (wptr, '\0', 8);
7479 wptr += 8;
7480 }
7481 }
7482 rptr += opd_ent_size;
7483 offset += opd_ent_size;
7484 }
7485
7486 if (skip)
7487 {
7488 if (!NO_OPD_RELOCS
7489 && !info->relocatable
7490 && !dec_dynrel_count (rel->r_info, sec, info,
7491 NULL, h, sym))
7492 goto error_ret;
7493 }
7494 else
7495 {
7496 /* We need to adjust any reloc offsets to point to the
7497 new opd entries. While we're at it, we may as well
7498 remove redundant relocs. */
7499 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7500 if (write_rel != rel)
7501 memcpy (write_rel, rel, sizeof (*rel));
7502 ++write_rel;
7503 }
7504 }
7505
7506 sec->size = wptr - new_contents;
7507 sec->reloc_count = write_rel - relstart;
7508 if (add_aux_fields)
7509 {
7510 free (sec->contents);
7511 sec->contents = new_contents;
7512 }
7513
7514 /* Fudge the header size too, as this is used later in
7515 elf_bfd_final_link if we are emitting relocs. */
7516 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7517 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7518 some_edited = TRUE;
7519 }
7520 else if (elf_section_data (sec)->relocs != relstart)
7521 free (relstart);
7522
7523 if (local_syms != NULL
7524 && symtab_hdr->contents != (unsigned char *) local_syms)
7525 {
7526 if (!info->keep_memory)
7527 free (local_syms);
7528 else
7529 symtab_hdr->contents = (unsigned char *) local_syms;
7530 }
7531 }
7532
7533 if (some_edited)
7534 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7535
7536 /* If we are doing a final link and the last .opd entry is just 16 byte
7537 long, add a 8 byte padding after it. */
7538 if (need_pad != NULL && !info->relocatable)
7539 {
7540 bfd_byte *p;
7541
7542 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7543 {
7544 BFD_ASSERT (need_pad->size > 0);
7545
7546 p = bfd_malloc (need_pad->size + 8);
7547 if (p == NULL)
7548 return FALSE;
7549
7550 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7551 p, 0, need_pad->size))
7552 return FALSE;
7553
7554 need_pad->contents = p;
7555 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7556 }
7557 else
7558 {
7559 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7560 if (p == NULL)
7561 return FALSE;
7562
7563 need_pad->contents = p;
7564 }
7565
7566 memset (need_pad->contents + need_pad->size, 0, 8);
7567 need_pad->size += 8;
7568 }
7569
7570 return TRUE;
7571}
7572
7573/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7574
7575asection *
7576ppc64_elf_tls_setup (struct bfd_link_info *info,
7577 int no_tls_get_addr_opt,
7578 int *no_multi_toc)
7579{
7580 struct ppc_link_hash_table *htab;
7581
7582 htab = ppc_hash_table (info);
7583 if (htab == NULL)
7584 return NULL;
7585
7586 if (*no_multi_toc)
7587 htab->do_multi_toc = 0;
7588 else if (!htab->do_multi_toc)
7589 *no_multi_toc = 1;
7590
7591 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7592 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7593 FALSE, FALSE, TRUE));
7594 /* Move dynamic linking info to the function descriptor sym. */
7595 if (htab->tls_get_addr != NULL)
7596 func_desc_adjust (&htab->tls_get_addr->elf, info);
7597 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7598 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7599 FALSE, FALSE, TRUE));
7600 if (!no_tls_get_addr_opt)
7601 {
7602 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7603
7604 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7605 FALSE, FALSE, TRUE);
7606 if (opt != NULL)
7607 func_desc_adjust (opt, info);
7608 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7609 FALSE, FALSE, TRUE);
7610 if (opt_fd != NULL
7611 && (opt_fd->root.type == bfd_link_hash_defined
7612 || opt_fd->root.type == bfd_link_hash_defweak))
7613 {
7614 /* If glibc supports an optimized __tls_get_addr call stub,
7615 signalled by the presence of __tls_get_addr_opt, and we'll
7616 be calling __tls_get_addr via a plt call stub, then
7617 make __tls_get_addr point to __tls_get_addr_opt. */
7618 tga_fd = &htab->tls_get_addr_fd->elf;
7619 if (htab->elf.dynamic_sections_created
7620 && tga_fd != NULL
7621 && (tga_fd->type == STT_FUNC
7622 || tga_fd->needs_plt)
7623 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7624 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7625 && tga_fd->root.type == bfd_link_hash_undefweak)))
7626 {
7627 struct plt_entry *ent;
7628
7629 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7630 if (ent->plt.refcount > 0)
7631 break;
7632 if (ent != NULL)
7633 {
7634 tga_fd->root.type = bfd_link_hash_indirect;
7635 tga_fd->root.u.i.link = &opt_fd->root;
7636 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7637 if (opt_fd->dynindx != -1)
7638 {
7639 /* Use __tls_get_addr_opt in dynamic relocations. */
7640 opt_fd->dynindx = -1;
7641 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7642 opt_fd->dynstr_index);
7643 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7644 return NULL;
7645 }
7646 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7647 tga = &htab->tls_get_addr->elf;
7648 if (opt != NULL && tga != NULL)
7649 {
7650 tga->root.type = bfd_link_hash_indirect;
7651 tga->root.u.i.link = &opt->root;
7652 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7653 _bfd_elf_link_hash_hide_symbol (info, opt,
7654 tga->forced_local);
7655 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7656 }
7657 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7658 htab->tls_get_addr_fd->is_func_descriptor = 1;
7659 if (htab->tls_get_addr != NULL)
7660 {
7661 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7662 htab->tls_get_addr->is_func = 1;
7663 }
7664 }
7665 }
7666 }
7667 else
7668 no_tls_get_addr_opt = TRUE;
7669 }
7670 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7671 return _bfd_elf_tls_setup (info->output_bfd, info);
7672}
7673
7674/* Return TRUE iff REL is a branch reloc with a global symbol matching
7675 HASH1 or HASH2. */
7676
7677static bfd_boolean
7678branch_reloc_hash_match (const bfd *ibfd,
7679 const Elf_Internal_Rela *rel,
7680 const struct ppc_link_hash_entry *hash1,
7681 const struct ppc_link_hash_entry *hash2)
7682{
7683 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7684 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7685 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7686
7687 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7688 {
7689 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7690 struct elf_link_hash_entry *h;
7691
7692 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7693 h = elf_follow_link (h);
7694 if (h == &hash1->elf || h == &hash2->elf)
7695 return TRUE;
7696 }
7697 return FALSE;
7698}
7699
7700/* Run through all the TLS relocs looking for optimization
7701 opportunities. The linker has been hacked (see ppc64elf.em) to do
7702 a preliminary section layout so that we know the TLS segment
7703 offsets. We can't optimize earlier because some optimizations need
7704 to know the tp offset, and we need to optimize before allocating
7705 dynamic relocations. */
7706
7707bfd_boolean
7708ppc64_elf_tls_optimize (struct bfd_link_info *info)
7709{
7710 bfd *ibfd;
7711 asection *sec;
7712 struct ppc_link_hash_table *htab;
7713 unsigned char *toc_ref;
7714 int pass;
7715
7716 if (info->relocatable || !info->executable)
7717 return TRUE;
7718
7719 htab = ppc_hash_table (info);
7720 if (htab == NULL)
7721 return FALSE;
7722
7723 /* Make two passes over the relocs. On the first pass, mark toc
7724 entries involved with tls relocs, and check that tls relocs
7725 involved in setting up a tls_get_addr call are indeed followed by
7726 such a call. If they are not, we can't do any tls optimization.
7727 On the second pass twiddle tls_mask flags to notify
7728 relocate_section that optimization can be done, and adjust got
7729 and plt refcounts. */
7730 toc_ref = NULL;
7731 for (pass = 0; pass < 2; ++pass)
7732 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7733 {
7734 Elf_Internal_Sym *locsyms = NULL;
7735 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7736
7737 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7738 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7739 {
7740 Elf_Internal_Rela *relstart, *rel, *relend;
7741 bfd_boolean found_tls_get_addr_arg = 0;
7742
7743 /* Read the relocations. */
7744 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7745 info->keep_memory);
7746 if (relstart == NULL)
7747 return FALSE;
7748
7749 relend = relstart + sec->reloc_count;
7750 for (rel = relstart; rel < relend; rel++)
7751 {
7752 enum elf_ppc64_reloc_type r_type;
7753 unsigned long r_symndx;
7754 struct elf_link_hash_entry *h;
7755 Elf_Internal_Sym *sym;
7756 asection *sym_sec;
7757 unsigned char *tls_mask;
7758 unsigned char tls_set, tls_clear, tls_type = 0;
7759 bfd_vma value;
7760 bfd_boolean ok_tprel, is_local;
7761 long toc_ref_index = 0;
7762 int expecting_tls_get_addr = 0;
7763 bfd_boolean ret = FALSE;
7764
7765 r_symndx = ELF64_R_SYM (rel->r_info);
7766 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7767 r_symndx, ibfd))
7768 {
7769 err_free_rel:
7770 if (elf_section_data (sec)->relocs != relstart)
7771 free (relstart);
7772 if (toc_ref != NULL)
7773 free (toc_ref);
7774 if (locsyms != NULL
7775 && (elf_symtab_hdr (ibfd).contents
7776 != (unsigned char *) locsyms))
7777 free (locsyms);
7778 return ret;
7779 }
7780
7781 if (h != NULL)
7782 {
7783 if (h->root.type == bfd_link_hash_defined
7784 || h->root.type == bfd_link_hash_defweak)
7785 value = h->root.u.def.value;
7786 else if (h->root.type == bfd_link_hash_undefweak)
7787 value = 0;
7788 else
7789 {
7790 found_tls_get_addr_arg = 0;
7791 continue;
7792 }
7793 }
7794 else
7795 /* Symbols referenced by TLS relocs must be of type
7796 STT_TLS. So no need for .opd local sym adjust. */
7797 value = sym->st_value;
7798
7799 ok_tprel = FALSE;
7800 is_local = FALSE;
7801 if (h == NULL
7802 || !h->def_dynamic)
7803 {
7804 is_local = TRUE;
7805 if (h != NULL
7806 && h->root.type == bfd_link_hash_undefweak)
7807 ok_tprel = TRUE;
7808 else
7809 {
7810 value += sym_sec->output_offset;
7811 value += sym_sec->output_section->vma;
7812 value -= htab->elf.tls_sec->vma;
7813 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7814 < (bfd_vma) 1 << 32);
7815 }
7816 }
7817
7818 r_type = ELF64_R_TYPE (rel->r_info);
7819 /* If this section has old-style __tls_get_addr calls
7820 without marker relocs, then check that each
7821 __tls_get_addr call reloc is preceded by a reloc
7822 that conceivably belongs to the __tls_get_addr arg
7823 setup insn. If we don't find matching arg setup
7824 relocs, don't do any tls optimization. */
7825 if (pass == 0
7826 && sec->has_tls_get_addr_call
7827 && h != NULL
7828 && (h == &htab->tls_get_addr->elf
7829 || h == &htab->tls_get_addr_fd->elf)
7830 && !found_tls_get_addr_arg
7831 && is_branch_reloc (r_type))
7832 {
7833 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7834 "TLS optimization disabled\n"),
7835 ibfd, sec, rel->r_offset);
7836 ret = TRUE;
7837 goto err_free_rel;
7838 }
7839
7840 found_tls_get_addr_arg = 0;
7841 switch (r_type)
7842 {
7843 case R_PPC64_GOT_TLSLD16:
7844 case R_PPC64_GOT_TLSLD16_LO:
7845 expecting_tls_get_addr = 1;
7846 found_tls_get_addr_arg = 1;
7847 /* Fall thru */
7848
7849 case R_PPC64_GOT_TLSLD16_HI:
7850 case R_PPC64_GOT_TLSLD16_HA:
7851 /* These relocs should never be against a symbol
7852 defined in a shared lib. Leave them alone if
7853 that turns out to be the case. */
7854 if (!is_local)
7855 continue;
7856
7857 /* LD -> LE */
7858 tls_set = 0;
7859 tls_clear = TLS_LD;
7860 tls_type = TLS_TLS | TLS_LD;
7861 break;
7862
7863 case R_PPC64_GOT_TLSGD16:
7864 case R_PPC64_GOT_TLSGD16_LO:
7865 expecting_tls_get_addr = 1;
7866 found_tls_get_addr_arg = 1;
7867 /* Fall thru */
7868
7869 case R_PPC64_GOT_TLSGD16_HI:
7870 case R_PPC64_GOT_TLSGD16_HA:
7871 if (ok_tprel)
7872 /* GD -> LE */
7873 tls_set = 0;
7874 else
7875 /* GD -> IE */
7876 tls_set = TLS_TLS | TLS_TPRELGD;
7877 tls_clear = TLS_GD;
7878 tls_type = TLS_TLS | TLS_GD;
7879 break;
7880
7881 case R_PPC64_GOT_TPREL16_DS:
7882 case R_PPC64_GOT_TPREL16_LO_DS:
7883 case R_PPC64_GOT_TPREL16_HI:
7884 case R_PPC64_GOT_TPREL16_HA:
7885 if (ok_tprel)
7886 {
7887 /* IE -> LE */
7888 tls_set = 0;
7889 tls_clear = TLS_TPREL;
7890 tls_type = TLS_TLS | TLS_TPREL;
7891 break;
7892 }
7893 continue;
7894
7895 case R_PPC64_TLSGD:
7896 case R_PPC64_TLSLD:
7897 found_tls_get_addr_arg = 1;
7898 /* Fall thru */
7899
7900 case R_PPC64_TLS:
7901 case R_PPC64_TOC16:
7902 case R_PPC64_TOC16_LO:
7903 if (sym_sec == NULL || sym_sec != toc)
7904 continue;
7905
7906 /* Mark this toc entry as referenced by a TLS
7907 code sequence. We can do that now in the
7908 case of R_PPC64_TLS, and after checking for
7909 tls_get_addr for the TOC16 relocs. */
7910 if (toc_ref == NULL)
7911 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7912 if (toc_ref == NULL)
7913 goto err_free_rel;
7914
7915 if (h != NULL)
7916 value = h->root.u.def.value;
7917 else
7918 value = sym->st_value;
7919 value += rel->r_addend;
7920 BFD_ASSERT (value < toc->size && value % 8 == 0);
7921 toc_ref_index = (value + toc->output_offset) / 8;
7922 if (r_type == R_PPC64_TLS
7923 || r_type == R_PPC64_TLSGD
7924 || r_type == R_PPC64_TLSLD)
7925 {
7926 toc_ref[toc_ref_index] = 1;
7927 continue;
7928 }
7929
7930 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7931 continue;
7932
7933 tls_set = 0;
7934 tls_clear = 0;
7935 expecting_tls_get_addr = 2;
7936 break;
7937
7938 case R_PPC64_TPREL64:
7939 if (pass == 0
7940 || sec != toc
7941 || toc_ref == NULL
7942 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7943 continue;
7944 if (ok_tprel)
7945 {
7946 /* IE -> LE */
7947 tls_set = TLS_EXPLICIT;
7948 tls_clear = TLS_TPREL;
7949 break;
7950 }
7951 continue;
7952
7953 case R_PPC64_DTPMOD64:
7954 if (pass == 0
7955 || sec != toc
7956 || toc_ref == NULL
7957 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7958 continue;
7959 if (rel + 1 < relend
7960 && (rel[1].r_info
7961 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7962 && rel[1].r_offset == rel->r_offset + 8)
7963 {
7964 if (ok_tprel)
7965 /* GD -> LE */
7966 tls_set = TLS_EXPLICIT | TLS_GD;
7967 else
7968 /* GD -> IE */
7969 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7970 tls_clear = TLS_GD;
7971 }
7972 else
7973 {
7974 if (!is_local)
7975 continue;
7976
7977 /* LD -> LE */
7978 tls_set = TLS_EXPLICIT;
7979 tls_clear = TLS_LD;
7980 }
7981 break;
7982
7983 default:
7984 continue;
7985 }
7986
7987 if (pass == 0)
7988 {
7989 if (!expecting_tls_get_addr
7990 || !sec->has_tls_get_addr_call)
7991 continue;
7992
7993 if (rel + 1 < relend
7994 && branch_reloc_hash_match (ibfd, rel + 1,
7995 htab->tls_get_addr,
7996 htab->tls_get_addr_fd))
7997 {
7998 if (expecting_tls_get_addr == 2)
7999 {
8000 /* Check for toc tls entries. */
8001 unsigned char *toc_tls;
8002 int retval;
8003
8004 retval = get_tls_mask (&toc_tls, NULL, NULL,
8005 &locsyms,
8006 rel, ibfd);
8007 if (retval == 0)
8008 goto err_free_rel;
8009 if (toc_tls != NULL)
8010 {
8011 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8012 found_tls_get_addr_arg = 1;
8013 if (retval > 1)
8014 toc_ref[toc_ref_index] = 1;
8015 }
8016 }
8017 continue;
8018 }
8019
8020 if (expecting_tls_get_addr != 1)
8021 continue;
8022
8023 /* Uh oh, we didn't find the expected call. We
8024 could just mark this symbol to exclude it
8025 from tls optimization but it's safer to skip
8026 the entire optimization. */
8027 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8028 "TLS optimization disabled\n"),
8029 ibfd, sec, rel->r_offset);
8030 ret = TRUE;
8031 goto err_free_rel;
8032 }
8033
8034 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8035 {
8036 struct plt_entry *ent;
8037 for (ent = htab->tls_get_addr->elf.plt.plist;
8038 ent != NULL;
8039 ent = ent->next)
8040 if (ent->addend == 0)
8041 {
8042 if (ent->plt.refcount > 0)
8043 {
8044 ent->plt.refcount -= 1;
8045 expecting_tls_get_addr = 0;
8046 }
8047 break;
8048 }
8049 }
8050
8051 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8052 {
8053 struct plt_entry *ent;
8054 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8055 ent != NULL;
8056 ent = ent->next)
8057 if (ent->addend == 0)
8058 {
8059 if (ent->plt.refcount > 0)
8060 ent->plt.refcount -= 1;
8061 break;
8062 }
8063 }
8064
8065 if (tls_clear == 0)
8066 continue;
8067
8068 if ((tls_set & TLS_EXPLICIT) == 0)
8069 {
8070 struct got_entry *ent;
8071
8072 /* Adjust got entry for this reloc. */
8073 if (h != NULL)
8074 ent = h->got.glist;
8075 else
8076 ent = elf_local_got_ents (ibfd)[r_symndx];
8077
8078 for (; ent != NULL; ent = ent->next)
8079 if (ent->addend == rel->r_addend
8080 && ent->owner == ibfd
8081 && ent->tls_type == tls_type)
8082 break;
8083 if (ent == NULL)
8084 abort ();
8085
8086 if (tls_set == 0)
8087 {
8088 /* We managed to get rid of a got entry. */
8089 if (ent->got.refcount > 0)
8090 ent->got.refcount -= 1;
8091 }
8092 }
8093 else
8094 {
8095 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8096 we'll lose one or two dyn relocs. */
8097 if (!dec_dynrel_count (rel->r_info, sec, info,
8098 NULL, h, sym))
8099 return FALSE;
8100
8101 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8102 {
8103 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8104 NULL, h, sym))
8105 return FALSE;
8106 }
8107 }
8108
8109 *tls_mask |= tls_set;
8110 *tls_mask &= ~tls_clear;
8111 }
8112
8113 if (elf_section_data (sec)->relocs != relstart)
8114 free (relstart);
8115 }
8116
8117 if (locsyms != NULL
8118 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8119 {
8120 if (!info->keep_memory)
8121 free (locsyms);
8122 else
8123 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8124 }
8125 }
8126
8127 if (toc_ref != NULL)
8128 free (toc_ref);
8129 return TRUE;
8130}
8131
8132/* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8133 the values of any global symbols in a toc section that has been
8134 edited. Globals in toc sections should be a rarity, so this function
8135 sets a flag if any are found in toc sections other than the one just
8136 edited, so that futher hash table traversals can be avoided. */
8137
8138struct adjust_toc_info
8139{
8140 asection *toc;
8141 unsigned long *skip;
8142 bfd_boolean global_toc_syms;
8143};
8144
8145enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8146
8147static bfd_boolean
8148adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8149{
8150 struct ppc_link_hash_entry *eh;
8151 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8152 unsigned long i;
8153
8154 if (h->root.type != bfd_link_hash_defined
8155 && h->root.type != bfd_link_hash_defweak)
8156 return TRUE;
8157
8158 eh = (struct ppc_link_hash_entry *) h;
8159 if (eh->adjust_done)
8160 return TRUE;
8161
8162 if (eh->elf.root.u.def.section == toc_inf->toc)
8163 {
8164 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8165 i = toc_inf->toc->rawsize >> 3;
8166 else
8167 i = eh->elf.root.u.def.value >> 3;
8168
8169 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8170 {
8171 (*_bfd_error_handler)
8172 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8173 do
8174 ++i;
8175 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8176 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8177 }
8178
8179 eh->elf.root.u.def.value -= toc_inf->skip[i];
8180 eh->adjust_done = 1;
8181 }
8182 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8183 toc_inf->global_toc_syms = TRUE;
8184
8185 return TRUE;
8186}
8187
8188/* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8189
8190static bfd_boolean
8191ok_lo_toc_insn (unsigned int insn)
8192{
8193 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8194 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8195 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8196 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8197 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8198 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8199 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8200 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8201 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8202 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8203 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8204 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8205 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8206 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8207 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8208 && (insn & 3) != 1)
8209 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8210 && ((insn & 3) == 0 || (insn & 3) == 3))
8211 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8212}
8213
8214/* Examine all relocs referencing .toc sections in order to remove
8215 unused .toc entries. */
8216
8217bfd_boolean
8218ppc64_elf_edit_toc (struct bfd_link_info *info)
8219{
8220 bfd *ibfd;
8221 struct adjust_toc_info toc_inf;
8222 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8223
8224 htab->do_toc_opt = 1;
8225 toc_inf.global_toc_syms = TRUE;
8226 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8227 {
8228 asection *toc, *sec;
8229 Elf_Internal_Shdr *symtab_hdr;
8230 Elf_Internal_Sym *local_syms;
8231 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8232 unsigned long *skip, *drop;
8233 unsigned char *used;
8234 unsigned char *keep, last, some_unused;
8235
8236 if (!is_ppc64_elf (ibfd))
8237 continue;
8238
8239 toc = bfd_get_section_by_name (ibfd, ".toc");
8240 if (toc == NULL
8241 || toc->size == 0
8242 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8243 || discarded_section (toc))
8244 continue;
8245
8246 toc_relocs = NULL;
8247 local_syms = NULL;
8248 symtab_hdr = &elf_symtab_hdr (ibfd);
8249
8250 /* Look at sections dropped from the final link. */
8251 skip = NULL;
8252 relstart = NULL;
8253 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8254 {
8255 if (sec->reloc_count == 0
8256 || !discarded_section (sec)
8257 || get_opd_info (sec)
8258 || (sec->flags & SEC_ALLOC) == 0
8259 || (sec->flags & SEC_DEBUGGING) != 0)
8260 continue;
8261
8262 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8263 if (relstart == NULL)
8264 goto error_ret;
8265
8266 /* Run through the relocs to see which toc entries might be
8267 unused. */
8268 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8269 {
8270 enum elf_ppc64_reloc_type r_type;
8271 unsigned long r_symndx;
8272 asection *sym_sec;
8273 struct elf_link_hash_entry *h;
8274 Elf_Internal_Sym *sym;
8275 bfd_vma val;
8276
8277 r_type = ELF64_R_TYPE (rel->r_info);
8278 switch (r_type)
8279 {
8280 default:
8281 continue;
8282
8283 case R_PPC64_TOC16:
8284 case R_PPC64_TOC16_LO:
8285 case R_PPC64_TOC16_HI:
8286 case R_PPC64_TOC16_HA:
8287 case R_PPC64_TOC16_DS:
8288 case R_PPC64_TOC16_LO_DS:
8289 break;
8290 }
8291
8292 r_symndx = ELF64_R_SYM (rel->r_info);
8293 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8294 r_symndx, ibfd))
8295 goto error_ret;
8296
8297 if (sym_sec != toc)
8298 continue;
8299
8300 if (h != NULL)
8301 val = h->root.u.def.value;
8302 else
8303 val = sym->st_value;
8304 val += rel->r_addend;
8305
8306 if (val >= toc->size)
8307 continue;
8308
8309 /* Anything in the toc ought to be aligned to 8 bytes.
8310 If not, don't mark as unused. */
8311 if (val & 7)
8312 continue;
8313
8314 if (skip == NULL)
8315 {
8316 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8317 if (skip == NULL)
8318 goto error_ret;
8319 }
8320
8321 skip[val >> 3] = ref_from_discarded;
8322 }
8323
8324 if (elf_section_data (sec)->relocs != relstart)
8325 free (relstart);
8326 }
8327
8328 /* For largetoc loads of address constants, we can convert
8329 . addis rx,2,addr@got@ha
8330 . ld ry,addr@got@l(rx)
8331 to
8332 . addis rx,2,addr@toc@ha
8333 . addi ry,rx,addr@toc@l
8334 when addr is within 2G of the toc pointer. This then means
8335 that the word storing "addr" in the toc is no longer needed. */
8336
8337 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8338 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8339 && toc->reloc_count != 0)
8340 {
8341 /* Read toc relocs. */
8342 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8343 info->keep_memory);
8344 if (toc_relocs == NULL)
8345 goto error_ret;
8346
8347 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8348 {
8349 enum elf_ppc64_reloc_type r_type;
8350 unsigned long r_symndx;
8351 asection *sym_sec;
8352 struct elf_link_hash_entry *h;
8353 Elf_Internal_Sym *sym;
8354 bfd_vma val, addr;
8355
8356 r_type = ELF64_R_TYPE (rel->r_info);
8357 if (r_type != R_PPC64_ADDR64)
8358 continue;
8359
8360 r_symndx = ELF64_R_SYM (rel->r_info);
8361 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8362 r_symndx, ibfd))
8363 goto error_ret;
8364
8365 if (sym_sec == NULL
8366 || discarded_section (sym_sec))
8367 continue;
8368
8369 if (!SYMBOL_CALLS_LOCAL (info, h))
8370 continue;
8371
8372 if (h != NULL)
8373 {
8374 if (h->type == STT_GNU_IFUNC)
8375 continue;
8376 val = h->root.u.def.value;
8377 }
8378 else
8379 {
8380 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8381 continue;
8382 val = sym->st_value;
8383 }
8384 val += rel->r_addend;
8385 val += sym_sec->output_section->vma + sym_sec->output_offset;
8386
8387 /* We don't yet know the exact toc pointer value, but we
8388 know it will be somewhere in the toc section. Don't
8389 optimize if the difference from any possible toc
8390 pointer is outside [ff..f80008000, 7fff7fff]. */
8391 addr = toc->output_section->vma + TOC_BASE_OFF;
8392 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8393 continue;
8394
8395 addr = toc->output_section->vma + toc->output_section->rawsize;
8396 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8397 continue;
8398
8399 if (skip == NULL)
8400 {
8401 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8402 if (skip == NULL)
8403 goto error_ret;
8404 }
8405
8406 skip[rel->r_offset >> 3]
8407 |= can_optimize | ((rel - toc_relocs) << 2);
8408 }
8409 }
8410
8411 if (skip == NULL)
8412 continue;
8413
8414 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8415 if (used == NULL)
8416 {
8417 error_ret:
8418 if (local_syms != NULL
8419 && symtab_hdr->contents != (unsigned char *) local_syms)
8420 free (local_syms);
8421 if (sec != NULL
8422 && relstart != NULL
8423 && elf_section_data (sec)->relocs != relstart)
8424 free (relstart);
8425 if (toc_relocs != NULL
8426 && elf_section_data (toc)->relocs != toc_relocs)
8427 free (toc_relocs);
8428 if (skip != NULL)
8429 free (skip);
8430 return FALSE;
8431 }
8432
8433 /* Now check all kept sections that might reference the toc.
8434 Check the toc itself last. */
8435 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8436 : ibfd->sections);
8437 sec != NULL;
8438 sec = (sec == toc ? NULL
8439 : sec->next == NULL ? toc
8440 : sec->next == toc && toc->next ? toc->next
8441 : sec->next))
8442 {
8443 int repeat;
8444
8445 if (sec->reloc_count == 0
8446 || discarded_section (sec)
8447 || get_opd_info (sec)
8448 || (sec->flags & SEC_ALLOC) == 0
8449 || (sec->flags & SEC_DEBUGGING) != 0)
8450 continue;
8451
8452 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8453 info->keep_memory);
8454 if (relstart == NULL)
8455 goto error_ret;
8456
8457 /* Mark toc entries referenced as used. */
8458 do
8459 {
8460 repeat = 0;
8461 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8462 {
8463 enum elf_ppc64_reloc_type r_type;
8464 unsigned long r_symndx;
8465 asection *sym_sec;
8466 struct elf_link_hash_entry *h;
8467 Elf_Internal_Sym *sym;
8468 bfd_vma val;
8469 enum {no_check, check_lo, check_ha} insn_check;
8470
8471 r_type = ELF64_R_TYPE (rel->r_info);
8472 switch (r_type)
8473 {
8474 default:
8475 insn_check = no_check;
8476 break;
8477
8478 case R_PPC64_GOT_TLSLD16_HA:
8479 case R_PPC64_GOT_TLSGD16_HA:
8480 case R_PPC64_GOT_TPREL16_HA:
8481 case R_PPC64_GOT_DTPREL16_HA:
8482 case R_PPC64_GOT16_HA:
8483 case R_PPC64_TOC16_HA:
8484 insn_check = check_ha;
8485 break;
8486
8487 case R_PPC64_GOT_TLSLD16_LO:
8488 case R_PPC64_GOT_TLSGD16_LO:
8489 case R_PPC64_GOT_TPREL16_LO_DS:
8490 case R_PPC64_GOT_DTPREL16_LO_DS:
8491 case R_PPC64_GOT16_LO:
8492 case R_PPC64_GOT16_LO_DS:
8493 case R_PPC64_TOC16_LO:
8494 case R_PPC64_TOC16_LO_DS:
8495 insn_check = check_lo;
8496 break;
8497 }
8498
8499 if (insn_check != no_check)
8500 {
8501 bfd_vma off = rel->r_offset & ~3;
8502 unsigned char buf[4];
8503 unsigned int insn;
8504
8505 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8506 {
8507 free (used);
8508 goto error_ret;
8509 }
8510 insn = bfd_get_32 (ibfd, buf);
8511 if (insn_check == check_lo
8512 ? !ok_lo_toc_insn (insn)
8513 : ((insn & ((0x3f << 26) | 0x1f << 16))
8514 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8515 {
8516 char str[12];
8517
8518 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8519 sprintf (str, "%#08x", insn);
8520 info->callbacks->einfo
8521 (_("%P: %H: toc optimization is not supported for"
8522 " %s instruction.\n"),
8523 ibfd, sec, rel->r_offset & ~3, str);
8524 }
8525 }
8526
8527 switch (r_type)
8528 {
8529 case R_PPC64_TOC16:
8530 case R_PPC64_TOC16_LO:
8531 case R_PPC64_TOC16_HI:
8532 case R_PPC64_TOC16_HA:
8533 case R_PPC64_TOC16_DS:
8534 case R_PPC64_TOC16_LO_DS:
8535 /* In case we're taking addresses of toc entries. */
8536 case R_PPC64_ADDR64:
8537 break;
8538
8539 default:
8540 continue;
8541 }
8542
8543 r_symndx = ELF64_R_SYM (rel->r_info);
8544 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8545 r_symndx, ibfd))
8546 {
8547 free (used);
8548 goto error_ret;
8549 }
8550
8551 if (sym_sec != toc)
8552 continue;
8553
8554 if (h != NULL)
8555 val = h->root.u.def.value;
8556 else
8557 val = sym->st_value;
8558 val += rel->r_addend;
8559
8560 if (val >= toc->size)
8561 continue;
8562
8563 if ((skip[val >> 3] & can_optimize) != 0)
8564 {
8565 bfd_vma off;
8566 unsigned char opc;
8567
8568 switch (r_type)
8569 {
8570 case R_PPC64_TOC16_HA:
8571 break;
8572
8573 case R_PPC64_TOC16_LO_DS:
8574 off = rel->r_offset;
8575 off += (bfd_big_endian (ibfd) ? -2 : 3);
8576 if (!bfd_get_section_contents (ibfd, sec, &opc,
8577 off, 1))
8578 {
8579 free (used);
8580 goto error_ret;
8581 }
8582 if ((opc & (0x3f << 2)) == (58u << 2))
8583 break;
8584 /* Fall thru */
8585
8586 default:
8587 /* Wrong sort of reloc, or not a ld. We may
8588 as well clear ref_from_discarded too. */
8589 skip[val >> 3] = 0;
8590 }
8591 }
8592
8593 if (sec != toc)
8594 used[val >> 3] = 1;
8595 /* For the toc section, we only mark as used if this
8596 entry itself isn't unused. */
8597 else if ((used[rel->r_offset >> 3]
8598 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8599 && !used[val >> 3])
8600 {
8601 /* Do all the relocs again, to catch reference
8602 chains. */
8603 repeat = 1;
8604 used[val >> 3] = 1;
8605 }
8606 }
8607 }
8608 while (repeat);
8609
8610 if (elf_section_data (sec)->relocs != relstart)
8611 free (relstart);
8612 }
8613
8614 /* Merge the used and skip arrays. Assume that TOC
8615 doublewords not appearing as either used or unused belong
8616 to to an entry more than one doubleword in size. */
8617 for (drop = skip, keep = used, last = 0, some_unused = 0;
8618 drop < skip + (toc->size + 7) / 8;
8619 ++drop, ++keep)
8620 {
8621 if (*keep)
8622 {
8623 *drop &= ~ref_from_discarded;
8624 if ((*drop & can_optimize) != 0)
8625 some_unused = 1;
8626 last = 0;
8627 }
8628 else if ((*drop & ref_from_discarded) != 0)
8629 {
8630 some_unused = 1;
8631 last = ref_from_discarded;
8632 }
8633 else
8634 *drop = last;
8635 }
8636
8637 free (used);
8638
8639 if (some_unused)
8640 {
8641 bfd_byte *contents, *src;
8642 unsigned long off;
8643 Elf_Internal_Sym *sym;
8644 bfd_boolean local_toc_syms = FALSE;
8645
8646 /* Shuffle the toc contents, and at the same time convert the
8647 skip array from booleans into offsets. */
8648 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8649 goto error_ret;
8650
8651 elf_section_data (toc)->this_hdr.contents = contents;
8652
8653 for (src = contents, off = 0, drop = skip;
8654 src < contents + toc->size;
8655 src += 8, ++drop)
8656 {
8657 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8658 off += 8;
8659 else if (off != 0)
8660 {
8661 *drop = off;
8662 memcpy (src - off, src, 8);
8663 }
8664 }
8665 *drop = off;
8666 toc->rawsize = toc->size;
8667 toc->size = src - contents - off;
8668
8669 /* Adjust addends for relocs against the toc section sym,
8670 and optimize any accesses we can. */
8671 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8672 {
8673 if (sec->reloc_count == 0
8674 || discarded_section (sec))
8675 continue;
8676
8677 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8678 info->keep_memory);
8679 if (relstart == NULL)
8680 goto error_ret;
8681
8682 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8683 {
8684 enum elf_ppc64_reloc_type r_type;
8685 unsigned long r_symndx;
8686 asection *sym_sec;
8687 struct elf_link_hash_entry *h;
8688 bfd_vma val;
8689
8690 r_type = ELF64_R_TYPE (rel->r_info);
8691 switch (r_type)
8692 {
8693 default:
8694 continue;
8695
8696 case R_PPC64_TOC16:
8697 case R_PPC64_TOC16_LO:
8698 case R_PPC64_TOC16_HI:
8699 case R_PPC64_TOC16_HA:
8700 case R_PPC64_TOC16_DS:
8701 case R_PPC64_TOC16_LO_DS:
8702 case R_PPC64_ADDR64:
8703 break;
8704 }
8705
8706 r_symndx = ELF64_R_SYM (rel->r_info);
8707 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8708 r_symndx, ibfd))
8709 goto error_ret;
8710
8711 if (sym_sec != toc)
8712 continue;
8713
8714 if (h != NULL)
8715 val = h->root.u.def.value;
8716 else
8717 {
8718 val = sym->st_value;
8719 if (val != 0)
8720 local_toc_syms = TRUE;
8721 }
8722
8723 val += rel->r_addend;
8724
8725 if (val > toc->rawsize)
8726 val = toc->rawsize;
8727 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8728 continue;
8729 else if ((skip[val >> 3] & can_optimize) != 0)
8730 {
8731 Elf_Internal_Rela *tocrel
8732 = toc_relocs + (skip[val >> 3] >> 2);
8733 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8734
8735 switch (r_type)
8736 {
8737 case R_PPC64_TOC16_HA:
8738 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8739 break;
8740
8741 case R_PPC64_TOC16_LO_DS:
8742 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8743 break;
8744
8745 default:
8746 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8747 ppc_howto_init ();
8748 info->callbacks->einfo
8749 (_("%P: %H: %s references "
8750 "optimized away TOC entry\n"),
8751 ibfd, sec, rel->r_offset,
8752 ppc64_elf_howto_table[r_type]->name);
8753 bfd_set_error (bfd_error_bad_value);
8754 goto error_ret;
8755 }
8756 rel->r_addend = tocrel->r_addend;
8757 elf_section_data (sec)->relocs = relstart;
8758 continue;
8759 }
8760
8761 if (h != NULL || sym->st_value != 0)
8762 continue;
8763
8764 rel->r_addend -= skip[val >> 3];
8765 elf_section_data (sec)->relocs = relstart;
8766 }
8767
8768 if (elf_section_data (sec)->relocs != relstart)
8769 free (relstart);
8770 }
8771
8772 /* We shouldn't have local or global symbols defined in the TOC,
8773 but handle them anyway. */
8774 if (local_syms != NULL)
8775 for (sym = local_syms;
8776 sym < local_syms + symtab_hdr->sh_info;
8777 ++sym)
8778 if (sym->st_value != 0
8779 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8780 {
8781 unsigned long i;
8782
8783 if (sym->st_value > toc->rawsize)
8784 i = toc->rawsize >> 3;
8785 else
8786 i = sym->st_value >> 3;
8787
8788 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8789 {
8790 if (local_toc_syms)
8791 (*_bfd_error_handler)
8792 (_("%s defined on removed toc entry"),
8793 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8794 do
8795 ++i;
8796 while ((skip[i] & (ref_from_discarded | can_optimize)));
8797 sym->st_value = (bfd_vma) i << 3;
8798 }
8799
8800 sym->st_value -= skip[i];
8801 symtab_hdr->contents = (unsigned char *) local_syms;
8802 }
8803
8804 /* Adjust any global syms defined in this toc input section. */
8805 if (toc_inf.global_toc_syms)
8806 {
8807 toc_inf.toc = toc;
8808 toc_inf.skip = skip;
8809 toc_inf.global_toc_syms = FALSE;
8810 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8811 &toc_inf);
8812 }
8813
8814 if (toc->reloc_count != 0)
8815 {
8816 Elf_Internal_Shdr *rel_hdr;
8817 Elf_Internal_Rela *wrel;
8818 bfd_size_type sz;
8819
8820 /* Remove unused toc relocs, and adjust those we keep. */
8821 if (toc_relocs == NULL)
8822 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8823 info->keep_memory);
8824 if (toc_relocs == NULL)
8825 goto error_ret;
8826
8827 wrel = toc_relocs;
8828 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8829 if ((skip[rel->r_offset >> 3]
8830 & (ref_from_discarded | can_optimize)) == 0)
8831 {
8832 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8833 wrel->r_info = rel->r_info;
8834 wrel->r_addend = rel->r_addend;
8835 ++wrel;
8836 }
8837 else if (!dec_dynrel_count (rel->r_info, toc, info,
8838 &local_syms, NULL, NULL))
8839 goto error_ret;
8840
8841 elf_section_data (toc)->relocs = toc_relocs;
8842 toc->reloc_count = wrel - toc_relocs;
8843 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8844 sz = rel_hdr->sh_entsize;
8845 rel_hdr->sh_size = toc->reloc_count * sz;
8846 }
8847 }
8848 else if (toc_relocs != NULL
8849 && elf_section_data (toc)->relocs != toc_relocs)
8850 free (toc_relocs);
8851
8852 if (local_syms != NULL
8853 && symtab_hdr->contents != (unsigned char *) local_syms)
8854 {
8855 if (!info->keep_memory)
8856 free (local_syms);
8857 else
8858 symtab_hdr->contents = (unsigned char *) local_syms;
8859 }
8860 free (skip);
8861 }
8862
8863 return TRUE;
8864}
8865
8866/* Return true iff input section I references the TOC using
8867 instructions limited to +/-32k offsets. */
8868
8869bfd_boolean
8870ppc64_elf_has_small_toc_reloc (asection *i)
8871{
8872 return (is_ppc64_elf (i->owner)
8873 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8874}
8875
8876/* Allocate space for one GOT entry. */
8877
8878static void
8879allocate_got (struct elf_link_hash_entry *h,
8880 struct bfd_link_info *info,
8881 struct got_entry *gent)
8882{
8883 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8884 bfd_boolean dyn;
8885 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8886 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8887 ? 16 : 8);
8888 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8889 ? 2 : 1) * sizeof (Elf64_External_Rela);
8890 asection *got = ppc64_elf_tdata (gent->owner)->got;
8891
8892 gent->got.offset = got->size;
8893 got->size += entsize;
8894
8895 dyn = htab->elf.dynamic_sections_created;
8896 if (h->type == STT_GNU_IFUNC)
8897 {
8898 htab->reliplt->size += rentsize;
8899 htab->got_reli_size += rentsize;
8900 }
8901 else if ((info->shared
8902 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8903 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8904 || h->root.type != bfd_link_hash_undefweak))
8905 {
8906 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8907 relgot->size += rentsize;
8908 }
8909}
8910
8911/* This function merges got entries in the same toc group. */
8912
8913static void
8914merge_got_entries (struct got_entry **pent)
8915{
8916 struct got_entry *ent, *ent2;
8917
8918 for (ent = *pent; ent != NULL; ent = ent->next)
8919 if (!ent->is_indirect)
8920 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8921 if (!ent2->is_indirect
8922 && ent2->addend == ent->addend
8923 && ent2->tls_type == ent->tls_type
8924 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8925 {
8926 ent2->is_indirect = TRUE;
8927 ent2->got.ent = ent;
8928 }
8929}
8930
8931/* Allocate space in .plt, .got and associated reloc sections for
8932 dynamic relocs. */
8933
8934static bfd_boolean
8935allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8936{
8937 struct bfd_link_info *info;
8938 struct ppc_link_hash_table *htab;
8939 asection *s;
8940 struct ppc_link_hash_entry *eh;
8941 struct elf_dyn_relocs *p;
8942 struct got_entry **pgent, *gent;
8943
8944 if (h->root.type == bfd_link_hash_indirect)
8945 return TRUE;
8946
8947 info = (struct bfd_link_info *) inf;
8948 htab = ppc_hash_table (info);
8949 if (htab == NULL)
8950 return FALSE;
8951
8952 if ((htab->elf.dynamic_sections_created
8953 && h->dynindx != -1
8954 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8955 || h->type == STT_GNU_IFUNC)
8956 {
8957 struct plt_entry *pent;
8958 bfd_boolean doneone = FALSE;
8959 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8960 if (pent->plt.refcount > 0)
8961 {
8962 if (!htab->elf.dynamic_sections_created
8963 || h->dynindx == -1)
8964 {
8965 s = htab->iplt;
8966 pent->plt.offset = s->size;
8967 s->size += PLT_ENTRY_SIZE;
8968 s = htab->reliplt;
8969 }
8970 else
8971 {
8972 /* If this is the first .plt entry, make room for the special
8973 first entry. */
8974 s = htab->plt;
8975 if (s->size == 0)
8976 s->size += PLT_INITIAL_ENTRY_SIZE;
8977
8978 pent->plt.offset = s->size;
8979
8980 /* Make room for this entry. */
8981 s->size += PLT_ENTRY_SIZE;
8982
8983 /* Make room for the .glink code. */
8984 s = htab->glink;
8985 if (s->size == 0)
8986 s->size += GLINK_CALL_STUB_SIZE;
8987 /* We need bigger stubs past index 32767. */
8988 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8989 s->size += 4;
8990 s->size += 2*4;
8991
8992 /* We also need to make an entry in the .rela.plt section. */
8993 s = htab->relplt;
8994 }
8995 s->size += sizeof (Elf64_External_Rela);
8996 doneone = TRUE;
8997 }
8998 else
8999 pent->plt.offset = (bfd_vma) -1;
9000 if (!doneone)
9001 {
9002 h->plt.plist = NULL;
9003 h->needs_plt = 0;
9004 }
9005 }
9006 else
9007 {
9008 h->plt.plist = NULL;
9009 h->needs_plt = 0;
9010 }
9011
9012 eh = (struct ppc_link_hash_entry *) h;
9013 /* Run through the TLS GD got entries first if we're changing them
9014 to TPREL. */
9015 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9016 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9017 if (gent->got.refcount > 0
9018 && (gent->tls_type & TLS_GD) != 0)
9019 {
9020 /* This was a GD entry that has been converted to TPREL. If
9021 there happens to be a TPREL entry we can use that one. */
9022 struct got_entry *ent;
9023 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9024 if (ent->got.refcount > 0
9025 && (ent->tls_type & TLS_TPREL) != 0
9026 && ent->addend == gent->addend
9027 && ent->owner == gent->owner)
9028 {
9029 gent->got.refcount = 0;
9030 break;
9031 }
9032
9033 /* If not, then we'll be using our own TPREL entry. */
9034 if (gent->got.refcount != 0)
9035 gent->tls_type = TLS_TLS | TLS_TPREL;
9036 }
9037
9038 /* Remove any list entry that won't generate a word in the GOT before
9039 we call merge_got_entries. Otherwise we risk merging to empty
9040 entries. */
9041 pgent = &h->got.glist;
9042 while ((gent = *pgent) != NULL)
9043 if (gent->got.refcount > 0)
9044 {
9045 if ((gent->tls_type & TLS_LD) != 0
9046 && !h->def_dynamic)
9047 {
9048 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9049 *pgent = gent->next;
9050 }
9051 else
9052 pgent = &gent->next;
9053 }
9054 else
9055 *pgent = gent->next;
9056
9057 if (!htab->do_multi_toc)
9058 merge_got_entries (&h->got.glist);
9059
9060 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9061 if (!gent->is_indirect)
9062 {
9063 /* Make sure this symbol is output as a dynamic symbol.
9064 Undefined weak syms won't yet be marked as dynamic,
9065 nor will all TLS symbols. */
9066 if (h->dynindx == -1
9067 && !h->forced_local
9068 && h->type != STT_GNU_IFUNC
9069 && htab->elf.dynamic_sections_created)
9070 {
9071 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9072 return FALSE;
9073 }
9074
9075 if (!is_ppc64_elf (gent->owner))
9076 abort ();
9077
9078 allocate_got (h, info, gent);
9079 }
9080
9081 if (eh->dyn_relocs == NULL
9082 || (!htab->elf.dynamic_sections_created
9083 && h->type != STT_GNU_IFUNC))
9084 return TRUE;
9085
9086 /* In the shared -Bsymbolic case, discard space allocated for
9087 dynamic pc-relative relocs against symbols which turn out to be
9088 defined in regular objects. For the normal shared case, discard
9089 space for relocs that have become local due to symbol visibility
9090 changes. */
9091
9092 if (info->shared)
9093 {
9094 /* Relocs that use pc_count are those that appear on a call insn,
9095 or certain REL relocs (see must_be_dyn_reloc) that can be
9096 generated via assembly. We want calls to protected symbols to
9097 resolve directly to the function rather than going via the plt.
9098 If people want function pointer comparisons to work as expected
9099 then they should avoid writing weird assembly. */
9100 if (SYMBOL_CALLS_LOCAL (info, h))
9101 {
9102 struct elf_dyn_relocs **pp;
9103
9104 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9105 {
9106 p->count -= p->pc_count;
9107 p->pc_count = 0;
9108 if (p->count == 0)
9109 *pp = p->next;
9110 else
9111 pp = &p->next;
9112 }
9113 }
9114
9115 /* Also discard relocs on undefined weak syms with non-default
9116 visibility. */
9117 if (eh->dyn_relocs != NULL
9118 && h->root.type == bfd_link_hash_undefweak)
9119 {
9120 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9121 eh->dyn_relocs = NULL;
9122
9123 /* Make sure this symbol is output as a dynamic symbol.
9124 Undefined weak syms won't yet be marked as dynamic. */
9125 else if (h->dynindx == -1
9126 && !h->forced_local)
9127 {
9128 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9129 return FALSE;
9130 }
9131 }
9132 }
9133 else if (h->type == STT_GNU_IFUNC)
9134 {
9135 if (!h->non_got_ref)
9136 eh->dyn_relocs = NULL;
9137 }
9138 else if (ELIMINATE_COPY_RELOCS)
9139 {
9140 /* For the non-shared case, discard space for relocs against
9141 symbols which turn out to need copy relocs or are not
9142 dynamic. */
9143
9144 if (!h->non_got_ref
9145 && !h->def_regular)
9146 {
9147 /* Make sure this symbol is output as a dynamic symbol.
9148 Undefined weak syms won't yet be marked as dynamic. */
9149 if (h->dynindx == -1
9150 && !h->forced_local)
9151 {
9152 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9153 return FALSE;
9154 }
9155
9156 /* If that succeeded, we know we'll be keeping all the
9157 relocs. */
9158 if (h->dynindx != -1)
9159 goto keep;
9160 }
9161
9162 eh->dyn_relocs = NULL;
9163
9164 keep: ;
9165 }
9166
9167 /* Finally, allocate space. */
9168 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9169 {
9170 asection *sreloc = elf_section_data (p->sec)->sreloc;
9171 if (eh->elf.type == STT_GNU_IFUNC)
9172 sreloc = htab->reliplt;
9173 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9174 }
9175
9176 return TRUE;
9177}
9178
9179/* Find any dynamic relocs that apply to read-only sections. */
9180
9181static bfd_boolean
9182readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9183{
9184 struct ppc_link_hash_entry *eh;
9185 struct elf_dyn_relocs *p;
9186
9187 eh = (struct ppc_link_hash_entry *) h;
9188 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9189 {
9190 asection *s = p->sec->output_section;
9191
9192 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9193 {
9194 struct bfd_link_info *info = inf;
9195
9196 info->flags |= DF_TEXTREL;
9197
9198 /* Not an error, just cut short the traversal. */
9199 return FALSE;
9200 }
9201 }
9202 return TRUE;
9203}
9204
9205/* Set the sizes of the dynamic sections. */
9206
9207static bfd_boolean
9208ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9209 struct bfd_link_info *info)
9210{
9211 struct ppc_link_hash_table *htab;
9212 bfd *dynobj;
9213 asection *s;
9214 bfd_boolean relocs;
9215 bfd *ibfd;
9216 struct got_entry *first_tlsld;
9217
9218 htab = ppc_hash_table (info);
9219 if (htab == NULL)
9220 return FALSE;
9221
9222 dynobj = htab->elf.dynobj;
9223 if (dynobj == NULL)
9224 abort ();
9225
9226 if (htab->elf.dynamic_sections_created)
9227 {
9228 /* Set the contents of the .interp section to the interpreter. */
9229 if (info->executable)
9230 {
9231 s = bfd_get_linker_section (dynobj, ".interp");
9232 if (s == NULL)
9233 abort ();
9234 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9235 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9236 }
9237 }
9238
9239 /* Set up .got offsets for local syms, and space for local dynamic
9240 relocs. */
9241 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9242 {
9243 struct got_entry **lgot_ents;
9244 struct got_entry **end_lgot_ents;
9245 struct plt_entry **local_plt;
9246 struct plt_entry **end_local_plt;
9247 unsigned char *lgot_masks;
9248 bfd_size_type locsymcount;
9249 Elf_Internal_Shdr *symtab_hdr;
9250
9251 if (!is_ppc64_elf (ibfd))
9252 continue;
9253
9254 for (s = ibfd->sections; s != NULL; s = s->next)
9255 {
9256 struct ppc_dyn_relocs *p;
9257
9258 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9259 {
9260 if (!bfd_is_abs_section (p->sec)
9261 && bfd_is_abs_section (p->sec->output_section))
9262 {
9263 /* Input section has been discarded, either because
9264 it is a copy of a linkonce section or due to
9265 linker script /DISCARD/, so we'll be discarding
9266 the relocs too. */
9267 }
9268 else if (p->count != 0)
9269 {
9270 asection *srel = elf_section_data (p->sec)->sreloc;
9271 if (p->ifunc)
9272 srel = htab->reliplt;
9273 srel->size += p->count * sizeof (Elf64_External_Rela);
9274 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9275 info->flags |= DF_TEXTREL;
9276 }
9277 }
9278 }
9279
9280 lgot_ents = elf_local_got_ents (ibfd);
9281 if (!lgot_ents)
9282 continue;
9283
9284 symtab_hdr = &elf_symtab_hdr (ibfd);
9285 locsymcount = symtab_hdr->sh_info;
9286 end_lgot_ents = lgot_ents + locsymcount;
9287 local_plt = (struct plt_entry **) end_lgot_ents;
9288 end_local_plt = local_plt + locsymcount;
9289 lgot_masks = (unsigned char *) end_local_plt;
9290 s = ppc64_elf_tdata (ibfd)->got;
9291 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9292 {
9293 struct got_entry **pent, *ent;
9294
9295 pent = lgot_ents;
9296 while ((ent = *pent) != NULL)
9297 if (ent->got.refcount > 0)
9298 {
9299 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9300 {
9301 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9302 *pent = ent->next;
9303 }
9304 else
9305 {
9306 unsigned int ent_size = 8;
9307 unsigned int rel_size = sizeof (Elf64_External_Rela);
9308
9309 ent->got.offset = s->size;
9310 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9311 {
9312 ent_size *= 2;
9313 rel_size *= 2;
9314 }
9315 s->size += ent_size;
9316 if ((*lgot_masks & PLT_IFUNC) != 0)
9317 {
9318 htab->reliplt->size += rel_size;
9319 htab->got_reli_size += rel_size;
9320 }
9321 else if (info->shared)
9322 {
9323 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9324 srel->size += rel_size;
9325 }
9326 pent = &ent->next;
9327 }
9328 }
9329 else
9330 *pent = ent->next;
9331 }
9332
9333 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9334 for (; local_plt < end_local_plt; ++local_plt)
9335 {
9336 struct plt_entry *ent;
9337
9338 for (ent = *local_plt; ent != NULL; ent = ent->next)
9339 if (ent->plt.refcount > 0)
9340 {
9341 s = htab->iplt;
9342 ent->plt.offset = s->size;
9343 s->size += PLT_ENTRY_SIZE;
9344
9345 htab->reliplt->size += sizeof (Elf64_External_Rela);
9346 }
9347 else
9348 ent->plt.offset = (bfd_vma) -1;
9349 }
9350 }
9351
9352 /* Allocate global sym .plt and .got entries, and space for global
9353 sym dynamic relocs. */
9354 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9355
9356 first_tlsld = NULL;
9357 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9358 {
9359 struct got_entry *ent;
9360
9361 if (!is_ppc64_elf (ibfd))
9362 continue;
9363
9364 ent = ppc64_tlsld_got (ibfd);
9365 if (ent->got.refcount > 0)
9366 {
9367 if (!htab->do_multi_toc && first_tlsld != NULL)
9368 {
9369 ent->is_indirect = TRUE;
9370 ent->got.ent = first_tlsld;
9371 }
9372 else
9373 {
9374 if (first_tlsld == NULL)
9375 first_tlsld = ent;
9376 s = ppc64_elf_tdata (ibfd)->got;
9377 ent->got.offset = s->size;
9378 ent->owner = ibfd;
9379 s->size += 16;
9380 if (info->shared)
9381 {
9382 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9383 srel->size += sizeof (Elf64_External_Rela);
9384 }
9385 }
9386 }
9387 else
9388 ent->got.offset = (bfd_vma) -1;
9389 }
9390
9391 /* We now have determined the sizes of the various dynamic sections.
9392 Allocate memory for them. */
9393 relocs = FALSE;
9394 for (s = dynobj->sections; s != NULL; s = s->next)
9395 {
9396 if ((s->flags & SEC_LINKER_CREATED) == 0)
9397 continue;
9398
9399 if (s == htab->brlt || s == htab->relbrlt)
9400 /* These haven't been allocated yet; don't strip. */
9401 continue;
9402 else if (s == htab->got
9403 || s == htab->plt
9404 || s == htab->iplt
9405 || s == htab->glink
9406 || s == htab->dynbss)
9407 {
9408 /* Strip this section if we don't need it; see the
9409 comment below. */
9410 }
9411 else if (s == htab->glink_eh_frame)
9412 {
9413 if (!bfd_is_abs_section (s->output_section))
9414 /* Not sized yet. */
9415 continue;
9416 }
9417 else if (CONST_STRNEQ (s->name, ".rela"))
9418 {
9419 if (s->size != 0)
9420 {
9421 if (s != htab->relplt)
9422 relocs = TRUE;
9423
9424 /* We use the reloc_count field as a counter if we need
9425 to copy relocs into the output file. */
9426 s->reloc_count = 0;
9427 }
9428 }
9429 else
9430 {
9431 /* It's not one of our sections, so don't allocate space. */
9432 continue;
9433 }
9434
9435 if (s->size == 0)
9436 {
9437 /* If we don't need this section, strip it from the
9438 output file. This is mostly to handle .rela.bss and
9439 .rela.plt. We must create both sections in
9440 create_dynamic_sections, because they must be created
9441 before the linker maps input sections to output
9442 sections. The linker does that before
9443 adjust_dynamic_symbol is called, and it is that
9444 function which decides whether anything needs to go
9445 into these sections. */
9446 s->flags |= SEC_EXCLUDE;
9447 continue;
9448 }
9449
9450 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9451 continue;
9452
9453 /* Allocate memory for the section contents. We use bfd_zalloc
9454 here in case unused entries are not reclaimed before the
9455 section's contents are written out. This should not happen,
9456 but this way if it does we get a R_PPC64_NONE reloc in .rela
9457 sections instead of garbage.
9458 We also rely on the section contents being zero when writing
9459 the GOT. */
9460 s->contents = bfd_zalloc (dynobj, s->size);
9461 if (s->contents == NULL)
9462 return FALSE;
9463 }
9464
9465 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9466 {
9467 if (!is_ppc64_elf (ibfd))
9468 continue;
9469
9470 s = ppc64_elf_tdata (ibfd)->got;
9471 if (s != NULL && s != htab->got)
9472 {
9473 if (s->size == 0)
9474 s->flags |= SEC_EXCLUDE;
9475 else
9476 {
9477 s->contents = bfd_zalloc (ibfd, s->size);
9478 if (s->contents == NULL)
9479 return FALSE;
9480 }
9481 }
9482 s = ppc64_elf_tdata (ibfd)->relgot;
9483 if (s != NULL)
9484 {
9485 if (s->size == 0)
9486 s->flags |= SEC_EXCLUDE;
9487 else
9488 {
9489 s->contents = bfd_zalloc (ibfd, s->size);
9490 if (s->contents == NULL)
9491 return FALSE;
9492 relocs = TRUE;
9493 s->reloc_count = 0;
9494 }
9495 }
9496 }
9497
9498 if (htab->elf.dynamic_sections_created)
9499 {
9500 /* Add some entries to the .dynamic section. We fill in the
9501 values later, in ppc64_elf_finish_dynamic_sections, but we
9502 must add the entries now so that we get the correct size for
9503 the .dynamic section. The DT_DEBUG entry is filled in by the
9504 dynamic linker and used by the debugger. */
9505#define add_dynamic_entry(TAG, VAL) \
9506 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9507
9508 if (info->executable)
9509 {
9510 if (!add_dynamic_entry (DT_DEBUG, 0))
9511 return FALSE;
9512 }
9513
9514 if (htab->plt != NULL && htab->plt->size != 0)
9515 {
9516 if (!add_dynamic_entry (DT_PLTGOT, 0)
9517 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9518 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9519 || !add_dynamic_entry (DT_JMPREL, 0)
9520 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9521 return FALSE;
9522 }
9523
9524 if (NO_OPD_RELOCS)
9525 {
9526 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9527 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9528 return FALSE;
9529 }
9530
9531 if (!htab->no_tls_get_addr_opt
9532 && htab->tls_get_addr_fd != NULL
9533 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9534 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9535 return FALSE;
9536
9537 if (relocs)
9538 {
9539 if (!add_dynamic_entry (DT_RELA, 0)
9540 || !add_dynamic_entry (DT_RELASZ, 0)
9541 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9542 return FALSE;
9543
9544 /* If any dynamic relocs apply to a read-only section,
9545 then we need a DT_TEXTREL entry. */
9546 if ((info->flags & DF_TEXTREL) == 0)
9547 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9548
9549 if ((info->flags & DF_TEXTREL) != 0)
9550 {
9551 if (!add_dynamic_entry (DT_TEXTREL, 0))
9552 return FALSE;
9553 }
9554 }
9555 }
9556#undef add_dynamic_entry
9557
9558 return TRUE;
9559}
9560
9561/* Determine the type of stub needed, if any, for a call. */
9562
9563static inline enum ppc_stub_type
9564ppc_type_of_stub (asection *input_sec,
9565 const Elf_Internal_Rela *rel,
9566 struct ppc_link_hash_entry **hash,
9567 struct plt_entry **plt_ent,
9568 bfd_vma destination)
9569{
9570 struct ppc_link_hash_entry *h = *hash;
9571 bfd_vma location;
9572 bfd_vma branch_offset;
9573 bfd_vma max_branch_offset;
9574 enum elf_ppc64_reloc_type r_type;
9575
9576 if (h != NULL)
9577 {
9578 struct plt_entry *ent;
9579 struct ppc_link_hash_entry *fdh = h;
9580 if (h->oh != NULL
9581 && h->oh->is_func_descriptor)
9582 {
9583 fdh = ppc_follow_link (h->oh);
9584 *hash = fdh;
9585 }
9586
9587 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9588 if (ent->addend == rel->r_addend
9589 && ent->plt.offset != (bfd_vma) -1)
9590 {
9591 *plt_ent = ent;
9592 return ppc_stub_plt_call;
9593 }
9594
9595 /* Here, we know we don't have a plt entry. If we don't have a
9596 either a defined function descriptor or a defined entry symbol
9597 in a regular object file, then it is pointless trying to make
9598 any other type of stub. */
9599 if (!is_static_defined (&fdh->elf)
9600 && !is_static_defined (&h->elf))
9601 return ppc_stub_none;
9602 }
9603 else if (elf_local_got_ents (input_sec->owner) != NULL)
9604 {
9605 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9606 struct plt_entry **local_plt = (struct plt_entry **)
9607 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9608 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9609
9610 if (local_plt[r_symndx] != NULL)
9611 {
9612 struct plt_entry *ent;
9613
9614 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9615 if (ent->addend == rel->r_addend
9616 && ent->plt.offset != (bfd_vma) -1)
9617 {
9618 *plt_ent = ent;
9619 return ppc_stub_plt_call;
9620 }
9621 }
9622 }
9623
9624 /* Determine where the call point is. */
9625 location = (input_sec->output_offset
9626 + input_sec->output_section->vma
9627 + rel->r_offset);
9628
9629 branch_offset = destination - location;
9630 r_type = ELF64_R_TYPE (rel->r_info);
9631
9632 /* Determine if a long branch stub is needed. */
9633 max_branch_offset = 1 << 25;
9634 if (r_type != R_PPC64_REL24)
9635 max_branch_offset = 1 << 15;
9636
9637 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9638 /* We need a stub. Figure out whether a long_branch or plt_branch
9639 is needed later. */
9640 return ppc_stub_long_branch;
9641
9642 return ppc_stub_none;
9643}
9644
9645/* With power7 weakly ordered memory model, it is possible for ld.so
9646 to update a plt entry in one thread and have another thread see a
9647 stale zero toc entry. To avoid this we need some sort of acquire
9648 barrier in the call stub. One solution is to make the load of the
9649 toc word seem to appear to depend on the load of the function entry
9650 word. Another solution is to test for r2 being zero, and branch to
9651 the appropriate glink entry if so.
9652
9653 . fake dep barrier compare
9654 . ld 11,xxx(2) ld 11,xxx(2)
9655 . mtctr 11 mtctr 11
9656 . xor 11,11,11 ld 2,xxx+8(2)
9657 . add 2,2,11 cmpldi 2,0
9658 . ld 2,xxx+8(2) bnectr+
9659 . bctr b <glink_entry>
9660
9661 The solution involving the compare turns out to be faster, so
9662 that's what we use unless the branch won't reach. */
9663
9664#define ALWAYS_USE_FAKE_DEP 0
9665#define ALWAYS_EMIT_R2SAVE 0
9666
9667#define PPC_LO(v) ((v) & 0xffff)
9668#define PPC_HI(v) (((v) >> 16) & 0xffff)
9669#define PPC_HA(v) PPC_HI ((v) + 0x8000)
9670
9671static inline unsigned int
9672plt_stub_size (struct ppc_link_hash_table *htab,
9673 struct ppc_stub_hash_entry *stub_entry,
9674 bfd_vma off)
9675{
9676 unsigned size = PLT_CALL_STUB_SIZE;
9677
9678 if (!(ALWAYS_EMIT_R2SAVE
9679 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9680 size -= 4;
9681 if (!htab->plt_static_chain)
9682 size -= 4;
9683 if (htab->plt_thread_safe)
9684 size += 8;
9685 if (PPC_HA (off) == 0)
9686 size -= 4;
9687 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9688 size += 4;
9689 if (stub_entry->h != NULL
9690 && (stub_entry->h == htab->tls_get_addr_fd
9691 || stub_entry->h == htab->tls_get_addr)
9692 && !htab->no_tls_get_addr_opt)
9693 size += 13 * 4;
9694 return size;
9695}
9696
9697/* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9698 then return the padding needed to do so. */
9699static inline unsigned int
9700plt_stub_pad (struct ppc_link_hash_table *htab,
9701 struct ppc_stub_hash_entry *stub_entry,
9702 bfd_vma plt_off)
9703{
9704 int stub_align = 1 << htab->plt_stub_align;
9705 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9706 bfd_vma stub_off = stub_entry->stub_sec->size;
9707
9708 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9709 > (stub_size & -stub_align))
9710 return stub_align - (stub_off & (stub_align - 1));
9711 return 0;
9712}
9713
9714/* Build a .plt call stub. */
9715
9716static inline bfd_byte *
9717build_plt_stub (struct ppc_link_hash_table *htab,
9718 struct ppc_stub_hash_entry *stub_entry,
9719 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9720{
9721 bfd *obfd = htab->stub_bfd;
9722 bfd_boolean plt_static_chain = htab->plt_static_chain;
9723 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9724 bfd_boolean use_fake_dep = plt_thread_safe;
9725 bfd_vma cmp_branch_off = 0;
9726
9727 if (!ALWAYS_USE_FAKE_DEP
9728 && plt_thread_safe
9729 && !(stub_entry->h != NULL
9730 && (stub_entry->h == htab->tls_get_addr_fd
9731 || stub_entry->h == htab->tls_get_addr)
9732 && !htab->no_tls_get_addr_opt))
9733 {
9734 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9735 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9736 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9737 bfd_vma to, from;
9738
9739 if (pltindex > 32768)
9740 glinkoff += (pltindex - 32768) * 4;
9741 to = (glinkoff
9742 + htab->glink->output_offset
9743 + htab->glink->output_section->vma);
9744 from = (p - stub_entry->stub_sec->contents
9745 + 4 * (ALWAYS_EMIT_R2SAVE
9746 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9747 + 4 * (PPC_HA (offset) != 0)
9748 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9749 != PPC_HA (offset))
9750 + 4 * (plt_static_chain != 0)
9751 + 20
9752 + stub_entry->stub_sec->output_offset
9753 + stub_entry->stub_sec->output_section->vma);
9754 cmp_branch_off = to - from;
9755 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9756 }
9757
9758 if (PPC_HA (offset) != 0)
9759 {
9760 if (r != NULL)
9761 {
9762 if (ALWAYS_EMIT_R2SAVE
9763 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9764 r[0].r_offset += 4;
9765 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9766 r[1].r_offset = r[0].r_offset + 4;
9767 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9768 r[1].r_addend = r[0].r_addend;
9769 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9770 {
9771 r[2].r_offset = r[1].r_offset + 4;
9772 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9773 r[2].r_addend = r[0].r_addend;
9774 }
9775 else
9776 {
9777 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9778 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9779 r[2].r_addend = r[0].r_addend + 8;
9780 if (plt_static_chain)
9781 {
9782 r[3].r_offset = r[2].r_offset + 4;
9783 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9784 r[3].r_addend = r[0].r_addend + 16;
9785 }
9786 }
9787 }
9788 if (ALWAYS_EMIT_R2SAVE
9789 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9790 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9791 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9792 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9793 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9794 {
9795 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9796 offset = 0;
9797 }
9798 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9799 if (use_fake_dep)
9800 {
9801 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9802 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9803 }
9804 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9805 if (plt_static_chain)
9806 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9807 }
9808 else
9809 {
9810 if (r != NULL)
9811 {
9812 if (ALWAYS_EMIT_R2SAVE
9813 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9814 r[0].r_offset += 4;
9815 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9816 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9817 {
9818 r[1].r_offset = r[0].r_offset + 4;
9819 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9820 r[1].r_addend = r[0].r_addend;
9821 }
9822 else
9823 {
9824 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9825 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9826 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9827 if (plt_static_chain)
9828 {
9829 r[2].r_offset = r[1].r_offset + 4;
9830 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9831 r[2].r_addend = r[0].r_addend + 8;
9832 }
9833 }
9834 }
9835 if (ALWAYS_EMIT_R2SAVE
9836 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9837 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9838 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9839 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9840 {
9841 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9842 offset = 0;
9843 }
9844 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9845 if (use_fake_dep)
9846 {
9847 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9848 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9849 }
9850 if (plt_static_chain)
9851 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9852 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9853 }
9854 if (plt_thread_safe && !use_fake_dep)
9855 {
9856 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9857 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9858 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
9859 }
9860 else
9861 bfd_put_32 (obfd, BCTR, p), p += 4;
9862 return p;
9863}
9864
9865/* Build a special .plt call stub for __tls_get_addr. */
9866
9867#define LD_R11_0R3 0xe9630000
9868#define LD_R12_0R3 0xe9830000
9869#define MR_R0_R3 0x7c601b78
9870#define CMPDI_R11_0 0x2c2b0000
9871#define ADD_R3_R12_R13 0x7c6c6a14
9872#define BEQLR 0x4d820020
9873#define MR_R3_R0 0x7c030378
9874#define MFLR_R11 0x7d6802a6
9875#define STD_R11_0R1 0xf9610000
9876#define BCTRL 0x4e800421
9877#define LD_R11_0R1 0xe9610000
9878#define LD_R2_0R1 0xe8410000
9879#define MTLR_R11 0x7d6803a6
9880
9881static inline bfd_byte *
9882build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
9883 struct ppc_stub_hash_entry *stub_entry,
9884 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9885{
9886 bfd *obfd = htab->stub_bfd;
9887
9888 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9889 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9890 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9891 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9892 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9893 bfd_put_32 (obfd, BEQLR, p), p += 4;
9894 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9895 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9896 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9897
9898 if (r != NULL)
9899 r[0].r_offset += 9 * 4;
9900 p = build_plt_stub (htab, stub_entry, p, offset, r);
9901 bfd_put_32 (obfd, BCTRL, p - 4);
9902
9903 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9904 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9905 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9906 bfd_put_32 (obfd, BLR, p), p += 4;
9907
9908 return p;
9909}
9910
9911static Elf_Internal_Rela *
9912get_relocs (asection *sec, int count)
9913{
9914 Elf_Internal_Rela *relocs;
9915 struct bfd_elf_section_data *elfsec_data;
9916
9917 elfsec_data = elf_section_data (sec);
9918 relocs = elfsec_data->relocs;
9919 if (relocs == NULL)
9920 {
9921 bfd_size_type relsize;
9922 relsize = sec->reloc_count * sizeof (*relocs);
9923 relocs = bfd_alloc (sec->owner, relsize);
9924 if (relocs == NULL)
9925 return NULL;
9926 elfsec_data->relocs = relocs;
9927 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9928 sizeof (Elf_Internal_Shdr));
9929 if (elfsec_data->rela.hdr == NULL)
9930 return NULL;
9931 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9932 * sizeof (Elf64_External_Rela));
9933 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9934 sec->reloc_count = 0;
9935 }
9936 relocs += sec->reloc_count;
9937 sec->reloc_count += count;
9938 return relocs;
9939}
9940
9941static bfd_vma
9942get_r2off (struct bfd_link_info *info,
9943 struct ppc_stub_hash_entry *stub_entry)
9944{
9945 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9946 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9947
9948 if (r2off == 0)
9949 {
9950 /* Support linking -R objects. Get the toc pointer from the
9951 opd entry. */
9952 char buf[8];
9953 asection *opd = stub_entry->h->elf.root.u.def.section;
9954 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9955
9956 if (strcmp (opd->name, ".opd") != 0
9957 || opd->reloc_count != 0)
9958 {
9959 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
9960 stub_entry->h->elf.root.root.string);
9961 bfd_set_error (bfd_error_bad_value);
9962 return 0;
9963 }
9964 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9965 return 0;
9966 r2off = bfd_get_64 (opd->owner, buf);
9967 r2off -= elf_gp (info->output_bfd);
9968 }
9969 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9970 return r2off;
9971}
9972
9973static bfd_boolean
9974ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9975{
9976 struct ppc_stub_hash_entry *stub_entry;
9977 struct ppc_branch_hash_entry *br_entry;
9978 struct bfd_link_info *info;
9979 struct ppc_link_hash_table *htab;
9980 bfd_byte *loc;
9981 bfd_byte *p;
9982 bfd_vma dest, off;
9983 int size;
9984 Elf_Internal_Rela *r;
9985 asection *plt;
9986
9987 /* Massage our args to the form they really have. */
9988 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9989 info = in_arg;
9990
9991 htab = ppc_hash_table (info);
9992 if (htab == NULL)
9993 return FALSE;
9994
9995 /* Make a note of the offset within the stubs for this entry. */
9996 stub_entry->stub_offset = stub_entry->stub_sec->size;
9997 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9998
9999 htab->stub_count[stub_entry->stub_type - 1] += 1;
10000 switch (stub_entry->stub_type)
10001 {
10002 case ppc_stub_long_branch:
10003 case ppc_stub_long_branch_r2off:
10004 /* Branches are relative. This is where we are going to. */
10005 off = dest = (stub_entry->target_value
10006 + stub_entry->target_section->output_offset
10007 + stub_entry->target_section->output_section->vma);
10008
10009 /* And this is where we are coming from. */
10010 off -= (stub_entry->stub_offset
10011 + stub_entry->stub_sec->output_offset
10012 + stub_entry->stub_sec->output_section->vma);
10013
10014 size = 4;
10015 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10016 {
10017 bfd_vma r2off = get_r2off (info, stub_entry);
10018
10019 if (r2off == 0)
10020 {
10021 htab->stub_error = TRUE;
10022 return FALSE;
10023 }
10024 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10025 loc += 4;
10026 size = 12;
10027 if (PPC_HA (r2off) != 0)
10028 {
10029 size = 16;
10030 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10031 loc += 4;
10032 }
10033 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10034 loc += 4;
10035 off -= size - 4;
10036 }
10037 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10038
10039 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10040 {
10041 info->callbacks->einfo
10042 (_("%P: long branch stub `%s' offset overflow\n"),
10043 stub_entry->root.string);
10044 htab->stub_error = TRUE;
10045 return FALSE;
10046 }
10047
10048 if (info->emitrelocations)
10049 {
10050 r = get_relocs (stub_entry->stub_sec, 1);
10051 if (r == NULL)
10052 return FALSE;
10053 r->r_offset = loc - stub_entry->stub_sec->contents;
10054 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10055 r->r_addend = dest;
10056 if (stub_entry->h != NULL)
10057 {
10058 struct elf_link_hash_entry **hashes;
10059 unsigned long symndx;
10060 struct ppc_link_hash_entry *h;
10061
10062 hashes = elf_sym_hashes (htab->stub_bfd);
10063 if (hashes == NULL)
10064 {
10065 bfd_size_type hsize;
10066
10067 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10068 hashes = bfd_zalloc (htab->stub_bfd, hsize);
10069 if (hashes == NULL)
10070 return FALSE;
10071 elf_sym_hashes (htab->stub_bfd) = hashes;
10072 htab->stub_globals = 1;
10073 }
10074 symndx = htab->stub_globals++;
10075 h = stub_entry->h;
10076 hashes[symndx] = &h->elf;
10077 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10078 if (h->oh != NULL && h->oh->is_func)
10079 h = ppc_follow_link (h->oh);
10080 if (h->elf.root.u.def.section != stub_entry->target_section)
10081 /* H is an opd symbol. The addend must be zero. */
10082 r->r_addend = 0;
10083 else
10084 {
10085 off = (h->elf.root.u.def.value
10086 + h->elf.root.u.def.section->output_offset
10087 + h->elf.root.u.def.section->output_section->vma);
10088 r->r_addend -= off;
10089 }
10090 }
10091 }
10092 break;
10093
10094 case ppc_stub_plt_branch:
10095 case ppc_stub_plt_branch_r2off:
10096 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10097 stub_entry->root.string + 9,
10098 FALSE, FALSE);
10099 if (br_entry == NULL)
10100 {
10101 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10102 stub_entry->root.string);
10103 htab->stub_error = TRUE;
10104 return FALSE;
10105 }
10106
10107 dest = (stub_entry->target_value
10108 + stub_entry->target_section->output_offset
10109 + stub_entry->target_section->output_section->vma);
10110
10111 bfd_put_64 (htab->brlt->owner, dest,
10112 htab->brlt->contents + br_entry->offset);
10113
10114 if (br_entry->iter == htab->stub_iteration)
10115 {
10116 br_entry->iter = 0;
10117
10118 if (htab->relbrlt != NULL)
10119 {
10120 /* Create a reloc for the branch lookup table entry. */
10121 Elf_Internal_Rela rela;
10122 bfd_byte *rl;
10123
10124 rela.r_offset = (br_entry->offset
10125 + htab->brlt->output_offset
10126 + htab->brlt->output_section->vma);
10127 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10128 rela.r_addend = dest;
10129
10130 rl = htab->relbrlt->contents;
10131 rl += (htab->relbrlt->reloc_count++
10132 * sizeof (Elf64_External_Rela));
10133 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10134 }
10135 else if (info->emitrelocations)
10136 {
10137 r = get_relocs (htab->brlt, 1);
10138 if (r == NULL)
10139 return FALSE;
10140 /* brlt, being SEC_LINKER_CREATED does not go through the
10141 normal reloc processing. Symbols and offsets are not
10142 translated from input file to output file form, so
10143 set up the offset per the output file. */
10144 r->r_offset = (br_entry->offset
10145 + htab->brlt->output_offset
10146 + htab->brlt->output_section->vma);
10147 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10148 r->r_addend = dest;
10149 }
10150 }
10151
10152 dest = (br_entry->offset
10153 + htab->brlt->output_offset
10154 + htab->brlt->output_section->vma);
10155
10156 off = (dest
10157 - elf_gp (htab->brlt->output_section->owner)
10158 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10159
10160 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10161 {
10162 info->callbacks->einfo
10163 (_("%P: linkage table error against `%T'\n"),
10164 stub_entry->root.string);
10165 bfd_set_error (bfd_error_bad_value);
10166 htab->stub_error = TRUE;
10167 return FALSE;
10168 }
10169
10170 if (info->emitrelocations)
10171 {
10172 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10173 if (r == NULL)
10174 return FALSE;
10175 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10176 if (bfd_big_endian (info->output_bfd))
10177 r[0].r_offset += 2;
10178 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10179 r[0].r_offset += 4;
10180 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10181 r[0].r_addend = dest;
10182 if (PPC_HA (off) != 0)
10183 {
10184 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10185 r[1].r_offset = r[0].r_offset + 4;
10186 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10187 r[1].r_addend = r[0].r_addend;
10188 }
10189 }
10190
10191 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10192 {
10193 if (PPC_HA (off) != 0)
10194 {
10195 size = 16;
10196 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10197 loc += 4;
10198 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10199 }
10200 else
10201 {
10202 size = 12;
10203 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10204 }
10205 }
10206 else
10207 {
10208 bfd_vma r2off = get_r2off (info, stub_entry);
10209
10210 if (r2off == 0)
10211 {
10212 htab->stub_error = TRUE;
10213 return FALSE;
10214 }
10215
10216 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10217 loc += 4;
10218 size = 20;
10219 if (PPC_HA (off) != 0)
10220 {
10221 size += 4;
10222 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10223 loc += 4;
10224 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10225 loc += 4;
10226 }
10227 else
10228 {
10229 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10230 loc += 4;
10231 }
10232
10233 if (PPC_HA (r2off) != 0)
10234 {
10235 size += 4;
10236 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10237 loc += 4;
10238 }
10239 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10240 }
10241 loc += 4;
10242 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10243 loc += 4;
10244 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10245 break;
10246
10247 case ppc_stub_plt_call:
10248 case ppc_stub_plt_call_r2save:
10249 if (stub_entry->h != NULL
10250 && stub_entry->h->is_func_descriptor
10251 && stub_entry->h->oh != NULL)
10252 {
10253 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10254
10255 /* If the old-ABI "dot-symbol" is undefined make it weak so
10256 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10257 FIXME: We used to define the symbol on one of the call
10258 stubs instead, which is why we test symbol section id
10259 against htab->top_id in various places. Likely all
10260 these checks could now disappear. */
10261 if (fh->elf.root.type == bfd_link_hash_undefined)
10262 fh->elf.root.type = bfd_link_hash_undefweak;
10263 /* Stop undo_symbol_twiddle changing it back to undefined. */
10264 fh->was_undefined = 0;
10265 }
10266
10267 /* Now build the stub. */
10268 dest = stub_entry->plt_ent->plt.offset & ~1;
10269 if (dest >= (bfd_vma) -2)
10270 abort ();
10271
10272 plt = htab->plt;
10273 if (!htab->elf.dynamic_sections_created
10274 || stub_entry->h == NULL
10275 || stub_entry->h->elf.dynindx == -1)
10276 plt = htab->iplt;
10277
10278 dest += plt->output_offset + plt->output_section->vma;
10279
10280 if (stub_entry->h == NULL
10281 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10282 {
10283 Elf_Internal_Rela rela;
10284 bfd_byte *rl;
10285
10286 rela.r_offset = dest;
10287 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10288 rela.r_addend = (stub_entry->target_value
10289 + stub_entry->target_section->output_offset
10290 + stub_entry->target_section->output_section->vma);
10291
10292 rl = (htab->reliplt->contents
10293 + (htab->reliplt->reloc_count++
10294 * sizeof (Elf64_External_Rela)));
10295 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10296 stub_entry->plt_ent->plt.offset |= 1;
10297 }
10298
10299 off = (dest
10300 - elf_gp (plt->output_section->owner)
10301 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10302
10303 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10304 {
10305 info->callbacks->einfo
10306 (_("%P: linkage table error against `%T'\n"),
10307 stub_entry->h != NULL
10308 ? stub_entry->h->elf.root.root.string
10309 : "<local sym>");
10310 bfd_set_error (bfd_error_bad_value);
10311 htab->stub_error = TRUE;
10312 return FALSE;
10313 }
10314
10315 if (htab->plt_stub_align != 0)
10316 {
10317 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10318
10319 stub_entry->stub_sec->size += pad;
10320 stub_entry->stub_offset = stub_entry->stub_sec->size;
10321 loc += pad;
10322 }
10323
10324 r = NULL;
10325 if (info->emitrelocations)
10326 {
10327 r = get_relocs (stub_entry->stub_sec,
10328 (2
10329 + (PPC_HA (off) != 0)
10330 + (htab->plt_static_chain
10331 && PPC_HA (off + 16) == PPC_HA (off))));
10332 if (r == NULL)
10333 return FALSE;
10334 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10335 if (bfd_big_endian (info->output_bfd))
10336 r[0].r_offset += 2;
10337 r[0].r_addend = dest;
10338 }
10339 if (stub_entry->h != NULL
10340 && (stub_entry->h == htab->tls_get_addr_fd
10341 || stub_entry->h == htab->tls_get_addr)
10342 && !htab->no_tls_get_addr_opt)
10343 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10344 else
10345 p = build_plt_stub (htab, stub_entry, loc, off, r);
10346 size = p - loc;
10347 break;
10348
10349 default:
10350 BFD_FAIL ();
10351 return FALSE;
10352 }
10353
10354 stub_entry->stub_sec->size += size;
10355
10356 if (htab->emit_stub_syms)
10357 {
10358 struct elf_link_hash_entry *h;
10359 size_t len1, len2;
10360 char *name;
10361 const char *const stub_str[] = { "long_branch",
10362 "long_branch_r2off",
10363 "plt_branch",
10364 "plt_branch_r2off",
10365 "plt_call",
10366 "plt_call" };
10367
10368 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10369 len2 = strlen (stub_entry->root.string);
10370 name = bfd_malloc (len1 + len2 + 2);
10371 if (name == NULL)
10372 return FALSE;
10373 memcpy (name, stub_entry->root.string, 9);
10374 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10375 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10376 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10377 if (h == NULL)
10378 return FALSE;
10379 if (h->root.type == bfd_link_hash_new)
10380 {
10381 h->root.type = bfd_link_hash_defined;
10382 h->root.u.def.section = stub_entry->stub_sec;
10383 h->root.u.def.value = stub_entry->stub_offset;
10384 h->ref_regular = 1;
10385 h->def_regular = 1;
10386 h->ref_regular_nonweak = 1;
10387 h->forced_local = 1;
10388 h->non_elf = 0;
10389 }
10390 }
10391
10392 return TRUE;
10393}
10394
10395/* As above, but don't actually build the stub. Just bump offset so
10396 we know stub section sizes, and select plt_branch stubs where
10397 long_branch stubs won't do. */
10398
10399static bfd_boolean
10400ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10401{
10402 struct ppc_stub_hash_entry *stub_entry;
10403 struct bfd_link_info *info;
10404 struct ppc_link_hash_table *htab;
10405 bfd_vma off;
10406 int size;
10407
10408 /* Massage our args to the form they really have. */
10409 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10410 info = in_arg;
10411
10412 htab = ppc_hash_table (info);
10413 if (htab == NULL)
10414 return FALSE;
10415
10416 if (stub_entry->stub_type == ppc_stub_plt_call
10417 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10418 {
10419 asection *plt;
10420 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10421 if (off >= (bfd_vma) -2)
10422 abort ();
10423 plt = htab->plt;
10424 if (!htab->elf.dynamic_sections_created
10425 || stub_entry->h == NULL
10426 || stub_entry->h->elf.dynindx == -1)
10427 plt = htab->iplt;
10428 off += (plt->output_offset
10429 + plt->output_section->vma
10430 - elf_gp (plt->output_section->owner)
10431 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10432
10433 size = plt_stub_size (htab, stub_entry, off);
10434 if (htab->plt_stub_align)
10435 size += plt_stub_pad (htab, stub_entry, off);
10436 if (info->emitrelocations)
10437 {
10438 stub_entry->stub_sec->reloc_count
10439 += (2
10440 + (PPC_HA (off) != 0)
10441 + (htab->plt_static_chain
10442 && PPC_HA (off + 16) == PPC_HA (off)));
10443 stub_entry->stub_sec->flags |= SEC_RELOC;
10444 }
10445 }
10446 else
10447 {
10448 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10449 variants. */
10450 bfd_vma r2off = 0;
10451
10452 off = (stub_entry->target_value
10453 + stub_entry->target_section->output_offset
10454 + stub_entry->target_section->output_section->vma);
10455 off -= (stub_entry->stub_sec->size
10456 + stub_entry->stub_sec->output_offset
10457 + stub_entry->stub_sec->output_section->vma);
10458
10459 /* Reset the stub type from the plt variant in case we now
10460 can reach with a shorter stub. */
10461 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10462 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10463
10464 size = 4;
10465 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10466 {
10467 r2off = get_r2off (info, stub_entry);
10468 if (r2off == 0)
10469 {
10470 htab->stub_error = TRUE;
10471 return FALSE;
10472 }
10473 size = 12;
10474 if (PPC_HA (r2off) != 0)
10475 size = 16;
10476 off -= size - 4;
10477 }
10478
10479 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10480 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10481 {
10482 struct ppc_branch_hash_entry *br_entry;
10483
10484 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10485 stub_entry->root.string + 9,
10486 TRUE, FALSE);
10487 if (br_entry == NULL)
10488 {
10489 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10490 stub_entry->root.string);
10491 htab->stub_error = TRUE;
10492 return FALSE;
10493 }
10494
10495 if (br_entry->iter != htab->stub_iteration)
10496 {
10497 br_entry->iter = htab->stub_iteration;
10498 br_entry->offset = htab->brlt->size;
10499 htab->brlt->size += 8;
10500
10501 if (htab->relbrlt != NULL)
10502 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10503 else if (info->emitrelocations)
10504 {
10505 htab->brlt->reloc_count += 1;
10506 htab->brlt->flags |= SEC_RELOC;
10507 }
10508 }
10509
10510 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10511 off = (br_entry->offset
10512 + htab->brlt->output_offset
10513 + htab->brlt->output_section->vma
10514 - elf_gp (htab->brlt->output_section->owner)
10515 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10516
10517 if (info->emitrelocations)
10518 {
10519 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10520 stub_entry->stub_sec->flags |= SEC_RELOC;
10521 }
10522
10523 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10524 {
10525 size = 12;
10526 if (PPC_HA (off) != 0)
10527 size = 16;
10528 }
10529 else
10530 {
10531 size = 20;
10532 if (PPC_HA (off) != 0)
10533 size += 4;
10534
10535 if (PPC_HA (r2off) != 0)
10536 size += 4;
10537 }
10538 }
10539 else if (info->emitrelocations)
10540 {
10541 stub_entry->stub_sec->reloc_count += 1;
10542 stub_entry->stub_sec->flags |= SEC_RELOC;
10543 }
10544 }
10545
10546 stub_entry->stub_sec->size += size;
10547 return TRUE;
10548}
10549
10550/* Set up various things so that we can make a list of input sections
10551 for each output section included in the link. Returns -1 on error,
10552 0 when no stubs will be needed, and 1 on success. */
10553
10554int
10555ppc64_elf_setup_section_lists
10556 (struct bfd_link_info *info,
10557 asection *(*add_stub_section) (const char *, asection *),
10558 void (*layout_sections_again) (void))
10559{
10560 bfd *input_bfd;
10561 int top_id, top_index, id;
10562 asection *section;
10563 asection **input_list;
10564 bfd_size_type amt;
10565 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10566
10567 if (htab == NULL)
10568 return -1;
10569 /* Stash our params away. */
10570 htab->add_stub_section = add_stub_section;
10571 htab->layout_sections_again = layout_sections_again;
10572
10573 /* Find the top input section id. */
10574 for (input_bfd = info->input_bfds, top_id = 3;
10575 input_bfd != NULL;
10576 input_bfd = input_bfd->link_next)
10577 {
10578 for (section = input_bfd->sections;
10579 section != NULL;
10580 section = section->next)
10581 {
10582 if (top_id < section->id)
10583 top_id = section->id;
10584 }
10585 }
10586
10587 htab->top_id = top_id;
10588 amt = sizeof (struct map_stub) * (top_id + 1);
10589 htab->stub_group = bfd_zmalloc (amt);
10590 if (htab->stub_group == NULL)
10591 return -1;
10592
10593 /* Set toc_off for com, und, abs and ind sections. */
10594 for (id = 0; id < 3; id++)
10595 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10596
10597 /* We can't use output_bfd->section_count here to find the top output
10598 section index as some sections may have been removed, and
10599 strip_excluded_output_sections doesn't renumber the indices. */
10600 for (section = info->output_bfd->sections, top_index = 0;
10601 section != NULL;
10602 section = section->next)
10603 {
10604 if (top_index < section->index)
10605 top_index = section->index;
10606 }
10607
10608 htab->top_index = top_index;
10609 amt = sizeof (asection *) * (top_index + 1);
10610 input_list = bfd_zmalloc (amt);
10611 htab->input_list = input_list;
10612 if (input_list == NULL)
10613 return -1;
10614
10615 return 1;
10616}
10617
10618/* Set up for first pass at multitoc partitioning. */
10619
10620void
10621ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10622{
10623 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10624
10625 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
10626 htab->toc_bfd = NULL;
10627 htab->toc_first_sec = NULL;
10628}
10629
10630/* The linker repeatedly calls this function for each TOC input section
10631 and linker generated GOT section. Group input bfds such that the toc
10632 within a group is less than 64k in size. */
10633
10634bfd_boolean
10635ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10636{
10637 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10638 bfd_vma addr, off, limit;
10639
10640 if (htab == NULL)
10641 return FALSE;
10642
10643 if (!htab->second_toc_pass)
10644 {
10645 /* Keep track of the first .toc or .got section for this input bfd. */
10646 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
10647
10648 if (new_bfd)
10649 {
10650 htab->toc_bfd = isec->owner;
10651 htab->toc_first_sec = isec;
10652 }
10653
10654 addr = isec->output_offset + isec->output_section->vma;
10655 off = addr - htab->toc_curr;
10656 limit = 0x80008000;
10657 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10658 limit = 0x10000;
10659 if (off + isec->size > limit)
10660 {
10661 addr = (htab->toc_first_sec->output_offset
10662 + htab->toc_first_sec->output_section->vma);
10663 htab->toc_curr = addr;
10664 }
10665
10666 /* toc_curr is the base address of this toc group. Set elf_gp
10667 for the input section to be the offset relative to the
10668 output toc base plus 0x8000. Making the input elf_gp an
10669 offset allows us to move the toc as a whole without
10670 recalculating input elf_gp. */
10671 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10672 off += TOC_BASE_OFF;
10673
10674 /* Die if someone uses a linker script that doesn't keep input
10675 file .toc and .got together. */
10676 if (new_bfd
10677 && elf_gp (isec->owner) != 0
10678 && elf_gp (isec->owner) != off)
10679 return FALSE;
10680
10681 elf_gp (isec->owner) = off;
10682 return TRUE;
10683 }
10684
10685 /* During the second pass toc_first_sec points to the start of
10686 a toc group, and toc_curr is used to track the old elf_gp.
10687 We use toc_bfd to ensure we only look at each bfd once. */
10688 if (htab->toc_bfd == isec->owner)
10689 return TRUE;
10690 htab->toc_bfd = isec->owner;
10691
10692 if (htab->toc_first_sec == NULL
10693 || htab->toc_curr != elf_gp (isec->owner))
10694 {
10695 htab->toc_curr = elf_gp (isec->owner);
10696 htab->toc_first_sec = isec;
10697 }
10698 addr = (htab->toc_first_sec->output_offset
10699 + htab->toc_first_sec->output_section->vma);
10700 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10701 elf_gp (isec->owner) = off;
10702
10703 return TRUE;
10704}
10705
10706/* Called via elf_link_hash_traverse to merge GOT entries for global
10707 symbol H. */
10708
10709static bfd_boolean
10710merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10711{
10712 if (h->root.type == bfd_link_hash_indirect)
10713 return TRUE;
10714
10715 merge_got_entries (&h->got.glist);
10716
10717 return TRUE;
10718}
10719
10720/* Called via elf_link_hash_traverse to allocate GOT entries for global
10721 symbol H. */
10722
10723static bfd_boolean
10724reallocate_got (struct elf_link_hash_entry *h, void *inf)
10725{
10726 struct got_entry *gent;
10727
10728 if (h->root.type == bfd_link_hash_indirect)
10729 return TRUE;
10730
10731 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10732 if (!gent->is_indirect)
10733 allocate_got (h, (struct bfd_link_info *) inf, gent);
10734 return TRUE;
10735}
10736
10737/* Called on the first multitoc pass after the last call to
10738 ppc64_elf_next_toc_section. This function removes duplicate GOT
10739 entries. */
10740
10741bfd_boolean
10742ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10743{
10744 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10745 struct bfd *ibfd, *ibfd2;
10746 bfd_boolean done_something;
10747
10748 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10749
10750 if (!htab->do_multi_toc)
10751 return FALSE;
10752
10753 /* Merge global sym got entries within a toc group. */
10754 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10755
10756 /* And tlsld_got. */
10757 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10758 {
10759 struct got_entry *ent, *ent2;
10760
10761 if (!is_ppc64_elf (ibfd))
10762 continue;
10763
10764 ent = ppc64_tlsld_got (ibfd);
10765 if (!ent->is_indirect
10766 && ent->got.offset != (bfd_vma) -1)
10767 {
10768 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10769 {
10770 if (!is_ppc64_elf (ibfd2))
10771 continue;
10772
10773 ent2 = ppc64_tlsld_got (ibfd2);
10774 if (!ent2->is_indirect
10775 && ent2->got.offset != (bfd_vma) -1
10776 && elf_gp (ibfd2) == elf_gp (ibfd))
10777 {
10778 ent2->is_indirect = TRUE;
10779 ent2->got.ent = ent;
10780 }
10781 }
10782 }
10783 }
10784
10785 /* Zap sizes of got sections. */
10786 htab->reliplt->rawsize = htab->reliplt->size;
10787 htab->reliplt->size -= htab->got_reli_size;
10788 htab->got_reli_size = 0;
10789
10790 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10791 {
10792 asection *got, *relgot;
10793
10794 if (!is_ppc64_elf (ibfd))
10795 continue;
10796
10797 got = ppc64_elf_tdata (ibfd)->got;
10798 if (got != NULL)
10799 {
10800 got->rawsize = got->size;
10801 got->size = 0;
10802 relgot = ppc64_elf_tdata (ibfd)->relgot;
10803 relgot->rawsize = relgot->size;
10804 relgot->size = 0;
10805 }
10806 }
10807
10808 /* Now reallocate the got, local syms first. We don't need to
10809 allocate section contents again since we never increase size. */
10810 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10811 {
10812 struct got_entry **lgot_ents;
10813 struct got_entry **end_lgot_ents;
10814 struct plt_entry **local_plt;
10815 struct plt_entry **end_local_plt;
10816 unsigned char *lgot_masks;
10817 bfd_size_type locsymcount;
10818 Elf_Internal_Shdr *symtab_hdr;
10819 asection *s;
10820
10821 if (!is_ppc64_elf (ibfd))
10822 continue;
10823
10824 lgot_ents = elf_local_got_ents (ibfd);
10825 if (!lgot_ents)
10826 continue;
10827
10828 symtab_hdr = &elf_symtab_hdr (ibfd);
10829 locsymcount = symtab_hdr->sh_info;
10830 end_lgot_ents = lgot_ents + locsymcount;
10831 local_plt = (struct plt_entry **) end_lgot_ents;
10832 end_local_plt = local_plt + locsymcount;
10833 lgot_masks = (unsigned char *) end_local_plt;
10834 s = ppc64_elf_tdata (ibfd)->got;
10835 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10836 {
10837 struct got_entry *ent;
10838
10839 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10840 {
10841 unsigned int ent_size = 8;
10842 unsigned int rel_size = sizeof (Elf64_External_Rela);
10843
10844 ent->got.offset = s->size;
10845 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10846 {
10847 ent_size *= 2;
10848 rel_size *= 2;
10849 }
10850 s->size += ent_size;
10851 if ((*lgot_masks & PLT_IFUNC) != 0)
10852 {
10853 htab->reliplt->size += rel_size;
10854 htab->got_reli_size += rel_size;
10855 }
10856 else if (info->shared)
10857 {
10858 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10859 srel->size += rel_size;
10860 }
10861 }
10862 }
10863 }
10864
10865 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10866
10867 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10868 {
10869 struct got_entry *ent;
10870
10871 if (!is_ppc64_elf (ibfd))
10872 continue;
10873
10874 ent = ppc64_tlsld_got (ibfd);
10875 if (!ent->is_indirect
10876 && ent->got.offset != (bfd_vma) -1)
10877 {
10878 asection *s = ppc64_elf_tdata (ibfd)->got;
10879 ent->got.offset = s->size;
10880 s->size += 16;
10881 if (info->shared)
10882 {
10883 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10884 srel->size += sizeof (Elf64_External_Rela);
10885 }
10886 }
10887 }
10888
10889 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10890 if (!done_something)
10891 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10892 {
10893 asection *got;
10894
10895 if (!is_ppc64_elf (ibfd))
10896 continue;
10897
10898 got = ppc64_elf_tdata (ibfd)->got;
10899 if (got != NULL)
10900 {
10901 done_something = got->rawsize != got->size;
10902 if (done_something)
10903 break;
10904 }
10905 }
10906
10907 if (done_something)
10908 (*htab->layout_sections_again) ();
10909
10910 /* Set up for second pass over toc sections to recalculate elf_gp
10911 on input sections. */
10912 htab->toc_bfd = NULL;
10913 htab->toc_first_sec = NULL;
10914 htab->second_toc_pass = TRUE;
10915 return done_something;
10916}
10917
10918/* Called after second pass of multitoc partitioning. */
10919
10920void
10921ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10922{
10923 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10924
10925 /* After the second pass, toc_curr tracks the TOC offset used
10926 for code sections below in ppc64_elf_next_input_section. */
10927 htab->toc_curr = TOC_BASE_OFF;
10928}
10929
10930/* No toc references were found in ISEC. If the code in ISEC makes no
10931 calls, then there's no need to use toc adjusting stubs when branching
10932 into ISEC. Actually, indirect calls from ISEC are OK as they will
10933 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10934 needed, and 2 if a cyclical call-graph was found but no other reason
10935 for a stub was detected. If called from the top level, a return of
10936 2 means the same as a return of 0. */
10937
10938static int
10939toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10940{
10941 int ret;
10942
10943 /* Mark this section as checked. */
10944 isec->call_check_done = 1;
10945
10946 /* We know none of our code bearing sections will need toc stubs. */
10947 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10948 return 0;
10949
10950 if (isec->size == 0)
10951 return 0;
10952
10953 if (isec->output_section == NULL)
10954 return 0;
10955
10956 ret = 0;
10957 if (isec->reloc_count != 0)
10958 {
10959 Elf_Internal_Rela *relstart, *rel;
10960 Elf_Internal_Sym *local_syms;
10961 struct ppc_link_hash_table *htab;
10962
10963 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10964 info->keep_memory);
10965 if (relstart == NULL)
10966 return -1;
10967
10968 /* Look for branches to outside of this section. */
10969 local_syms = NULL;
10970 htab = ppc_hash_table (info);
10971 if (htab == NULL)
10972 return -1;
10973
10974 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10975 {
10976 enum elf_ppc64_reloc_type r_type;
10977 unsigned long r_symndx;
10978 struct elf_link_hash_entry *h;
10979 struct ppc_link_hash_entry *eh;
10980 Elf_Internal_Sym *sym;
10981 asection *sym_sec;
10982 struct _opd_sec_data *opd;
10983 bfd_vma sym_value;
10984 bfd_vma dest;
10985
10986 r_type = ELF64_R_TYPE (rel->r_info);
10987 if (r_type != R_PPC64_REL24
10988 && r_type != R_PPC64_REL14
10989 && r_type != R_PPC64_REL14_BRTAKEN
10990 && r_type != R_PPC64_REL14_BRNTAKEN)
10991 continue;
10992
10993 r_symndx = ELF64_R_SYM (rel->r_info);
10994 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10995 isec->owner))
10996 {
10997 ret = -1;
10998 break;
10999 }
11000
11001 /* Calls to dynamic lib functions go through a plt call stub
11002 that uses r2. */
11003 eh = (struct ppc_link_hash_entry *) h;
11004 if (eh != NULL
11005 && (eh->elf.plt.plist != NULL
11006 || (eh->oh != NULL
11007 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11008 {
11009 ret = 1;
11010 break;
11011 }
11012
11013 if (sym_sec == NULL)
11014 /* Ignore other undefined symbols. */
11015 continue;
11016
11017 /* Assume branches to other sections not included in the
11018 link need stubs too, to cover -R and absolute syms. */
11019 if (sym_sec->output_section == NULL)
11020 {
11021 ret = 1;
11022 break;
11023 }
11024
11025 if (h == NULL)
11026 sym_value = sym->st_value;
11027 else
11028 {
11029 if (h->root.type != bfd_link_hash_defined
11030 && h->root.type != bfd_link_hash_defweak)
11031 abort ();
11032 sym_value = h->root.u.def.value;
11033 }
11034 sym_value += rel->r_addend;
11035
11036 /* If this branch reloc uses an opd sym, find the code section. */
11037 opd = get_opd_info (sym_sec);
11038 if (opd != NULL)
11039 {
11040 if (h == NULL && opd->adjust != NULL)
11041 {
11042 long adjust;
11043
11044 adjust = opd->adjust[sym->st_value / 8];
11045 if (adjust == -1)
11046 /* Assume deleted functions won't ever be called. */
11047 continue;
11048 sym_value += adjust;
11049 }
11050
11051 dest = opd_entry_value (sym_sec, sym_value,
11052 &sym_sec, NULL, FALSE);
11053 if (dest == (bfd_vma) -1)
11054 continue;
11055 }
11056 else
11057 dest = (sym_value
11058 + sym_sec->output_offset
11059 + sym_sec->output_section->vma);
11060
11061 /* Ignore branch to self. */
11062 if (sym_sec == isec)
11063 continue;
11064
11065 /* If the called function uses the toc, we need a stub. */
11066 if (sym_sec->has_toc_reloc
11067 || sym_sec->makes_toc_func_call)
11068 {
11069 ret = 1;
11070 break;
11071 }
11072
11073 /* Assume any branch that needs a long branch stub might in fact
11074 need a plt_branch stub. A plt_branch stub uses r2. */
11075 else if (dest - (isec->output_offset
11076 + isec->output_section->vma
11077 + rel->r_offset) + (1 << 25) >= (2 << 25))
11078 {
11079 ret = 1;
11080 break;
11081 }
11082
11083 /* If calling back to a section in the process of being
11084 tested, we can't say for sure that no toc adjusting stubs
11085 are needed, so don't return zero. */
11086 else if (sym_sec->call_check_in_progress)
11087 ret = 2;
11088
11089 /* Branches to another section that itself doesn't have any TOC
11090 references are OK. Recursively call ourselves to check. */
11091 else if (!sym_sec->call_check_done)
11092 {
11093 int recur;
11094
11095 /* Mark current section as indeterminate, so that other
11096 sections that call back to current won't be marked as
11097 known. */
11098 isec->call_check_in_progress = 1;
11099 recur = toc_adjusting_stub_needed (info, sym_sec);
11100 isec->call_check_in_progress = 0;
11101
11102 if (recur != 0)
11103 {
11104 ret = recur;
11105 if (recur != 2)
11106 break;
11107 }
11108 }
11109 }
11110
11111 if (local_syms != NULL
11112 && (elf_symtab_hdr (isec->owner).contents
11113 != (unsigned char *) local_syms))
11114 free (local_syms);
11115 if (elf_section_data (isec)->relocs != relstart)
11116 free (relstart);
11117 }
11118
11119 if ((ret & 1) == 0
11120 && isec->map_head.s != NULL
11121 && (strcmp (isec->output_section->name, ".init") == 0
11122 || strcmp (isec->output_section->name, ".fini") == 0))
11123 {
11124 if (isec->map_head.s->has_toc_reloc
11125 || isec->map_head.s->makes_toc_func_call)
11126 ret = 1;
11127 else if (!isec->map_head.s->call_check_done)
11128 {
11129 int recur;
11130 isec->call_check_in_progress = 1;
11131 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11132 isec->call_check_in_progress = 0;
11133 if (recur != 0)
11134 ret = recur;
11135 }
11136 }
11137
11138 if (ret == 1)
11139 isec->makes_toc_func_call = 1;
11140
11141 return ret;
11142}
11143
11144/* The linker repeatedly calls this function for each input section,
11145 in the order that input sections are linked into output sections.
11146 Build lists of input sections to determine groupings between which
11147 we may insert linker stubs. */
11148
11149bfd_boolean
11150ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11151{
11152 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11153
11154 if (htab == NULL)
11155 return FALSE;
11156
11157 if ((isec->output_section->flags & SEC_CODE) != 0
11158 && isec->output_section->index <= htab->top_index)
11159 {
11160 asection **list = htab->input_list + isec->output_section->index;
11161 /* Steal the link_sec pointer for our list. */
11162#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11163 /* This happens to make the list in reverse order,
11164 which is what we want. */
11165 PREV_SEC (isec) = *list;
11166 *list = isec;
11167 }
11168
11169 if (htab->multi_toc_needed)
11170 {
11171 /* If a code section has a function that uses the TOC then we need
11172 to use the right TOC (obviously). Also, make sure that .opd gets
11173 the correct TOC value for R_PPC64_TOC relocs that don't have or
11174 can't find their function symbol (shouldn't ever happen now).
11175 Also specially treat .fixup for the linux kernel. .fixup
11176 contains branches, but only back to the function that hit an
11177 exception. */
11178 if (isec->has_toc_reloc
11179 || (isec->flags & SEC_CODE) == 0
11180 || strcmp (isec->name, ".fixup") == 0)
11181 {
11182 if (elf_gp (isec->owner) != 0)
11183 htab->toc_curr = elf_gp (isec->owner);
11184 }
11185 else
11186 {
11187 if (!isec->call_check_done
11188 && toc_adjusting_stub_needed (info, isec) < 0)
11189 return FALSE;
11190 /* If we make a local call from this section, ie. a branch
11191 without a following nop, then we have no place to put a
11192 toc restoring insn. We must use the same toc group as
11193 the callee.
11194 Testing makes_toc_func_call actually tests for *any*
11195 calls to functions that need a good toc pointer. A more
11196 precise test would be better, as this one will set
11197 incorrect values for pasted .init/.fini fragments.
11198 (Fixed later in check_pasted_section.) */
11199 if (isec->makes_toc_func_call
11200 && elf_gp (isec->owner) != 0)
11201 htab->toc_curr = elf_gp (isec->owner);
11202 }
11203 }
11204
11205 /* Functions that don't use the TOC can belong in any TOC group.
11206 Use the last TOC base. */
11207 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11208 return TRUE;
11209}
11210
11211/* Check that all .init and .fini sections use the same toc, if they
11212 have toc relocs. */
11213
11214static bfd_boolean
11215check_pasted_section (struct bfd_link_info *info, const char *name)
11216{
11217 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11218
11219 if (o != NULL)
11220 {
11221 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11222 bfd_vma toc_off = 0;
11223 asection *i;
11224
11225 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11226 if (i->has_toc_reloc)
11227 {
11228 if (toc_off == 0)
11229 toc_off = htab->stub_group[i->id].toc_off;
11230 else if (toc_off != htab->stub_group[i->id].toc_off)
11231 return FALSE;
11232 }
11233
11234 if (toc_off == 0)
11235 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11236 if (i->makes_toc_func_call)
11237 {
11238 toc_off = htab->stub_group[i->id].toc_off;
11239 break;
11240 }
11241
11242 /* Make sure the whole pasted function uses the same toc offset. */
11243 if (toc_off != 0)
11244 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11245 htab->stub_group[i->id].toc_off = toc_off;
11246 }
11247 return TRUE;
11248}
11249
11250bfd_boolean
11251ppc64_elf_check_init_fini (struct bfd_link_info *info)
11252{
11253 return (check_pasted_section (info, ".init")
11254 & check_pasted_section (info, ".fini"));
11255}
11256
11257/* See whether we can group stub sections together. Grouping stub
11258 sections may result in fewer stubs. More importantly, we need to
11259 put all .init* and .fini* stubs at the beginning of the .init or
11260 .fini output sections respectively, because glibc splits the
11261 _init and _fini functions into multiple parts. Putting a stub in
11262 the middle of a function is not a good idea. */
11263
11264static void
11265group_sections (struct ppc_link_hash_table *htab,
11266 bfd_size_type stub_group_size,
11267 bfd_boolean stubs_always_before_branch)
11268{
11269 asection **list;
11270 bfd_size_type stub14_group_size;
11271 bfd_boolean suppress_size_errors;
11272
11273 suppress_size_errors = FALSE;
11274 stub14_group_size = stub_group_size;
11275 if (stub_group_size == 1)
11276 {
11277 /* Default values. */
11278 if (stubs_always_before_branch)
11279 {
11280 stub_group_size = 0x1e00000;
11281 stub14_group_size = 0x7800;
11282 }
11283 else
11284 {
11285 stub_group_size = 0x1c00000;
11286 stub14_group_size = 0x7000;
11287 }
11288 suppress_size_errors = TRUE;
11289 }
11290
11291 list = htab->input_list + htab->top_index;
11292 do
11293 {
11294 asection *tail = *list;
11295 while (tail != NULL)
11296 {
11297 asection *curr;
11298 asection *prev;
11299 bfd_size_type total;
11300 bfd_boolean big_sec;
11301 bfd_vma curr_toc;
11302
11303 curr = tail;
11304 total = tail->size;
11305 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11306 && ppc64_elf_section_data (tail)->has_14bit_branch
11307 ? stub14_group_size : stub_group_size);
11308 if (big_sec && !suppress_size_errors)
11309 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11310 tail->owner, tail);
11311 curr_toc = htab->stub_group[tail->id].toc_off;
11312
11313 while ((prev = PREV_SEC (curr)) != NULL
11314 && ((total += curr->output_offset - prev->output_offset)
11315 < (ppc64_elf_section_data (prev) != NULL
11316 && ppc64_elf_section_data (prev)->has_14bit_branch
11317 ? stub14_group_size : stub_group_size))
11318 && htab->stub_group[prev->id].toc_off == curr_toc)
11319 curr = prev;
11320
11321 /* OK, the size from the start of CURR to the end is less
11322 than stub_group_size and thus can be handled by one stub
11323 section. (or the tail section is itself larger than
11324 stub_group_size, in which case we may be toast.) We
11325 should really be keeping track of the total size of stubs
11326 added here, as stubs contribute to the final output
11327 section size. That's a little tricky, and this way will
11328 only break if stubs added make the total size more than
11329 2^25, ie. for the default stub_group_size, if stubs total
11330 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11331 do
11332 {
11333 prev = PREV_SEC (tail);
11334 /* Set up this stub group. */
11335 htab->stub_group[tail->id].link_sec = curr;
11336 }
11337 while (tail != curr && (tail = prev) != NULL);
11338
11339 /* But wait, there's more! Input sections up to stub_group_size
11340 bytes before the stub section can be handled by it too.
11341 Don't do this if we have a really large section after the
11342 stubs, as adding more stubs increases the chance that
11343 branches may not reach into the stub section. */
11344 if (!stubs_always_before_branch && !big_sec)
11345 {
11346 total = 0;
11347 while (prev != NULL
11348 && ((total += tail->output_offset - prev->output_offset)
11349 < (ppc64_elf_section_data (prev) != NULL
11350 && ppc64_elf_section_data (prev)->has_14bit_branch
11351 ? stub14_group_size : stub_group_size))
11352 && htab->stub_group[prev->id].toc_off == curr_toc)
11353 {
11354 tail = prev;
11355 prev = PREV_SEC (tail);
11356 htab->stub_group[tail->id].link_sec = curr;
11357 }
11358 }
11359 tail = prev;
11360 }
11361 }
11362 while (list-- != htab->input_list);
11363 free (htab->input_list);
11364#undef PREV_SEC
11365}
11366
11367static const unsigned char glink_eh_frame_cie[] =
11368{
11369 0, 0, 0, 16, /* length. */
11370 0, 0, 0, 0, /* id. */
11371 1, /* CIE version. */
11372 'z', 'R', 0, /* Augmentation string. */
11373 4, /* Code alignment. */
11374 0x78, /* Data alignment. */
11375 65, /* RA reg. */
11376 1, /* Augmentation size. */
11377 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11378 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11379};
11380
11381/* Stripping output sections is normally done before dynamic section
11382 symbols have been allocated. This function is called later, and
11383 handles cases like htab->brlt which is mapped to its own output
11384 section. */
11385
11386static void
11387maybe_strip_output (struct bfd_link_info *info, asection *isec)
11388{
11389 if (isec->size == 0
11390 && isec->output_section->size == 0
11391 && !(isec->output_section->flags & SEC_KEEP)
11392 && !bfd_section_removed_from_list (info->output_bfd,
11393 isec->output_section)
11394 && elf_section_data (isec->output_section)->dynindx == 0)
11395 {
11396 isec->output_section->flags |= SEC_EXCLUDE;
11397 bfd_section_list_remove (info->output_bfd, isec->output_section);
11398 info->output_bfd->section_count--;
11399 }
11400}
11401
11402/* Determine and set the size of the stub section for a final link.
11403
11404 The basic idea here is to examine all the relocations looking for
11405 PC-relative calls to a target that is unreachable with a "bl"
11406 instruction. */
11407
11408bfd_boolean
11409ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11410 bfd_boolean plt_static_chain, int plt_thread_safe,
11411 int plt_stub_align)
11412{
11413 bfd_size_type stub_group_size;
11414 bfd_boolean stubs_always_before_branch;
11415 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11416
11417 if (htab == NULL)
11418 return FALSE;
11419
11420 htab->plt_static_chain = plt_static_chain;
11421 htab->plt_stub_align = plt_stub_align;
11422 if (plt_thread_safe == -1 && !info->executable)
11423 plt_thread_safe = 1;
11424 if (plt_thread_safe == -1)
11425 {
11426 static const char *const thread_starter[] =
11427 {
11428 "pthread_create",
11429 /* libstdc++ */
11430 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11431 /* librt */
11432 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11433 "mq_notify", "create_timer",
11434 /* libanl */
11435 "getaddrinfo_a",
11436 /* libgomp */
11437 "GOMP_parallel_start",
11438 "GOMP_parallel_loop_static_start",
11439 "GOMP_parallel_loop_dynamic_start",
11440 "GOMP_parallel_loop_guided_start",
11441 "GOMP_parallel_loop_runtime_start",
11442 "GOMP_parallel_sections_start",
11443 };
11444 unsigned i;
11445
11446 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11447 {
11448 struct elf_link_hash_entry *h;
11449 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11450 FALSE, FALSE, TRUE);
11451 plt_thread_safe = h != NULL && h->ref_regular;
11452 if (plt_thread_safe)
11453 break;
11454 }
11455 }
11456 htab->plt_thread_safe = plt_thread_safe;
11457 stubs_always_before_branch = group_size < 0;
11458 if (group_size < 0)
11459 stub_group_size = -group_size;
11460 else
11461 stub_group_size = group_size;
11462
11463 group_sections (htab, stub_group_size, stubs_always_before_branch);
11464
11465 while (1)
11466 {
11467 bfd *input_bfd;
11468 unsigned int bfd_indx;
11469 asection *stub_sec;
11470
11471 htab->stub_iteration += 1;
11472
11473 for (input_bfd = info->input_bfds, bfd_indx = 0;
11474 input_bfd != NULL;
11475 input_bfd = input_bfd->link_next, bfd_indx++)
11476 {
11477 Elf_Internal_Shdr *symtab_hdr;
11478 asection *section;
11479 Elf_Internal_Sym *local_syms = NULL;
11480
11481 if (!is_ppc64_elf (input_bfd))
11482 continue;
11483
11484 /* We'll need the symbol table in a second. */
11485 symtab_hdr = &elf_symtab_hdr (input_bfd);
11486 if (symtab_hdr->sh_info == 0)
11487 continue;
11488
11489 /* Walk over each section attached to the input bfd. */
11490 for (section = input_bfd->sections;
11491 section != NULL;
11492 section = section->next)
11493 {
11494 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11495
11496 /* If there aren't any relocs, then there's nothing more
11497 to do. */
11498 if ((section->flags & SEC_RELOC) == 0
11499 || (section->flags & SEC_ALLOC) == 0
11500 || (section->flags & SEC_LOAD) == 0
11501 || (section->flags & SEC_CODE) == 0
11502 || section->reloc_count == 0)
11503 continue;
11504
11505 /* If this section is a link-once section that will be
11506 discarded, then don't create any stubs. */
11507 if (section->output_section == NULL
11508 || section->output_section->owner != info->output_bfd)
11509 continue;
11510
11511 /* Get the relocs. */
11512 internal_relocs
11513 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11514 info->keep_memory);
11515 if (internal_relocs == NULL)
11516 goto error_ret_free_local;
11517
11518 /* Now examine each relocation. */
11519 irela = internal_relocs;
11520 irelaend = irela + section->reloc_count;
11521 for (; irela < irelaend; irela++)
11522 {
11523 enum elf_ppc64_reloc_type r_type;
11524 unsigned int r_indx;
11525 enum ppc_stub_type stub_type;
11526 struct ppc_stub_hash_entry *stub_entry;
11527 asection *sym_sec, *code_sec;
11528 bfd_vma sym_value, code_value;
11529 bfd_vma destination;
11530 bfd_boolean ok_dest;
11531 struct ppc_link_hash_entry *hash;
11532 struct ppc_link_hash_entry *fdh;
11533 struct elf_link_hash_entry *h;
11534 Elf_Internal_Sym *sym;
11535 char *stub_name;
11536 const asection *id_sec;
11537 struct _opd_sec_data *opd;
11538 struct plt_entry *plt_ent;
11539
11540 r_type = ELF64_R_TYPE (irela->r_info);
11541 r_indx = ELF64_R_SYM (irela->r_info);
11542
11543 if (r_type >= R_PPC64_max)
11544 {
11545 bfd_set_error (bfd_error_bad_value);
11546 goto error_ret_free_internal;
11547 }
11548
11549 /* Only look for stubs on branch instructions. */
11550 if (r_type != R_PPC64_REL24
11551 && r_type != R_PPC64_REL14
11552 && r_type != R_PPC64_REL14_BRTAKEN
11553 && r_type != R_PPC64_REL14_BRNTAKEN)
11554 continue;
11555
11556 /* Now determine the call target, its name, value,
11557 section. */
11558 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11559 r_indx, input_bfd))
11560 goto error_ret_free_internal;
11561 hash = (struct ppc_link_hash_entry *) h;
11562
11563 ok_dest = FALSE;
11564 fdh = NULL;
11565 sym_value = 0;
11566 if (hash == NULL)
11567 {
11568 sym_value = sym->st_value;
11569 ok_dest = TRUE;
11570 }
11571 else if (hash->elf.root.type == bfd_link_hash_defined
11572 || hash->elf.root.type == bfd_link_hash_defweak)
11573 {
11574 sym_value = hash->elf.root.u.def.value;
11575 if (sym_sec->output_section != NULL)
11576 ok_dest = TRUE;
11577 }
11578 else if (hash->elf.root.type == bfd_link_hash_undefweak
11579 || hash->elf.root.type == bfd_link_hash_undefined)
11580 {
11581 /* Recognise an old ABI func code entry sym, and
11582 use the func descriptor sym instead if it is
11583 defined. */
11584 if (hash->elf.root.root.string[0] == '.'
11585 && (fdh = lookup_fdh (hash, htab)) != NULL)
11586 {
11587 if (fdh->elf.root.type == bfd_link_hash_defined
11588 || fdh->elf.root.type == bfd_link_hash_defweak)
11589 {
11590 sym_sec = fdh->elf.root.u.def.section;
11591 sym_value = fdh->elf.root.u.def.value;
11592 if (sym_sec->output_section != NULL)
11593 ok_dest = TRUE;
11594 }
11595 else
11596 fdh = NULL;
11597 }
11598 }
11599 else
11600 {
11601 bfd_set_error (bfd_error_bad_value);
11602 goto error_ret_free_internal;
11603 }
11604
11605 destination = 0;
11606 if (ok_dest)
11607 {
11608 sym_value += irela->r_addend;
11609 destination = (sym_value
11610 + sym_sec->output_offset
11611 + sym_sec->output_section->vma);
11612 }
11613
11614 code_sec = sym_sec;
11615 code_value = sym_value;
11616 opd = get_opd_info (sym_sec);
11617 if (opd != NULL)
11618 {
11619 bfd_vma dest;
11620
11621 if (hash == NULL && opd->adjust != NULL)
11622 {
11623 long adjust = opd->adjust[sym_value / 8];
11624 if (adjust == -1)
11625 continue;
11626 code_value += adjust;
11627 sym_value += adjust;
11628 }
11629 dest = opd_entry_value (sym_sec, sym_value,
11630 &code_sec, &code_value, FALSE);
11631 if (dest != (bfd_vma) -1)
11632 {
11633 destination = dest;
11634 if (fdh != NULL)
11635 {
11636 /* Fixup old ABI sym to point at code
11637 entry. */
11638 hash->elf.root.type = bfd_link_hash_defweak;
11639 hash->elf.root.u.def.section = code_sec;
11640 hash->elf.root.u.def.value = code_value;
11641 }
11642 }
11643 }
11644
11645 /* Determine what (if any) linker stub is needed. */
11646 plt_ent = NULL;
11647 stub_type = ppc_type_of_stub (section, irela, &hash,
11648 &plt_ent, destination);
11649
11650 if (stub_type != ppc_stub_plt_call)
11651 {
11652 /* Check whether we need a TOC adjusting stub.
11653 Since the linker pastes together pieces from
11654 different object files when creating the
11655 _init and _fini functions, it may be that a
11656 call to what looks like a local sym is in
11657 fact a call needing a TOC adjustment. */
11658 if (code_sec != NULL
11659 && code_sec->output_section != NULL
11660 && (htab->stub_group[code_sec->id].toc_off
11661 != htab->stub_group[section->id].toc_off)
11662 && (code_sec->has_toc_reloc
11663 || code_sec->makes_toc_func_call))
11664 stub_type = ppc_stub_long_branch_r2off;
11665 }
11666
11667 if (stub_type == ppc_stub_none)
11668 continue;
11669
11670 /* __tls_get_addr calls might be eliminated. */
11671 if (stub_type != ppc_stub_plt_call
11672 && hash != NULL
11673 && (hash == htab->tls_get_addr
11674 || hash == htab->tls_get_addr_fd)
11675 && section->has_tls_reloc
11676 && irela != internal_relocs)
11677 {
11678 /* Get tls info. */
11679 unsigned char *tls_mask;
11680
11681 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11682 irela - 1, input_bfd))
11683 goto error_ret_free_internal;
11684 if (*tls_mask != 0)
11685 continue;
11686 }
11687
11688 if (stub_type == ppc_stub_plt_call
11689 && irela + 1 < irelaend
11690 && irela[1].r_offset == irela->r_offset + 4
11691 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11692 {
11693 if (!tocsave_find (htab, INSERT,
11694 &local_syms, irela + 1, input_bfd))
11695 goto error_ret_free_internal;
11696 }
11697 else if (stub_type == ppc_stub_plt_call)
11698 stub_type = ppc_stub_plt_call_r2save;
11699
11700 /* Support for grouping stub sections. */
11701 id_sec = htab->stub_group[section->id].link_sec;
11702
11703 /* Get the name of this stub. */
11704 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11705 if (!stub_name)
11706 goto error_ret_free_internal;
11707
11708 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11709 stub_name, FALSE, FALSE);
11710 if (stub_entry != NULL)
11711 {
11712 /* The proper stub has already been created. */
11713 free (stub_name);
11714 if (stub_type == ppc_stub_plt_call_r2save)
11715 stub_entry->stub_type = stub_type;
11716 continue;
11717 }
11718
11719 stub_entry = ppc_add_stub (stub_name, section, info);
11720 if (stub_entry == NULL)
11721 {
11722 free (stub_name);
11723 error_ret_free_internal:
11724 if (elf_section_data (section)->relocs == NULL)
11725 free (internal_relocs);
11726 error_ret_free_local:
11727 if (local_syms != NULL
11728 && (symtab_hdr->contents
11729 != (unsigned char *) local_syms))
11730 free (local_syms);
11731 return FALSE;
11732 }
11733
11734 stub_entry->stub_type = stub_type;
11735 if (stub_type != ppc_stub_plt_call
11736 && stub_type != ppc_stub_plt_call_r2save)
11737 {
11738 stub_entry->target_value = code_value;
11739 stub_entry->target_section = code_sec;
11740 }
11741 else
11742 {
11743 stub_entry->target_value = sym_value;
11744 stub_entry->target_section = sym_sec;
11745 }
11746 stub_entry->h = hash;
11747 stub_entry->plt_ent = plt_ent;
11748 stub_entry->addend = irela->r_addend;
11749
11750 if (stub_entry->h != NULL)
11751 htab->stub_globals += 1;
11752 }
11753
11754 /* We're done with the internal relocs, free them. */
11755 if (elf_section_data (section)->relocs != internal_relocs)
11756 free (internal_relocs);
11757 }
11758
11759 if (local_syms != NULL
11760 && symtab_hdr->contents != (unsigned char *) local_syms)
11761 {
11762 if (!info->keep_memory)
11763 free (local_syms);
11764 else
11765 symtab_hdr->contents = (unsigned char *) local_syms;
11766 }
11767 }
11768
11769 /* We may have added some stubs. Find out the new size of the
11770 stub sections. */
11771 for (stub_sec = htab->stub_bfd->sections;
11772 stub_sec != NULL;
11773 stub_sec = stub_sec->next)
11774 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11775 {
11776 stub_sec->rawsize = stub_sec->size;
11777 stub_sec->size = 0;
11778 stub_sec->reloc_count = 0;
11779 stub_sec->flags &= ~SEC_RELOC;
11780 }
11781
11782 htab->brlt->size = 0;
11783 htab->brlt->reloc_count = 0;
11784 htab->brlt->flags &= ~SEC_RELOC;
11785 if (htab->relbrlt != NULL)
11786 htab->relbrlt->size = 0;
11787
11788 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11789
11790 if (info->emitrelocations
11791 && htab->glink != NULL && htab->glink->size != 0)
11792 {
11793 htab->glink->reloc_count = 1;
11794 htab->glink->flags |= SEC_RELOC;
11795 }
11796
11797 if (htab->glink_eh_frame != NULL
11798 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11799 && htab->glink_eh_frame->output_section->size != 0)
11800 {
11801 size_t size = 0, align;
11802
11803 for (stub_sec = htab->stub_bfd->sections;
11804 stub_sec != NULL;
11805 stub_sec = stub_sec->next)
11806 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11807 size += 20;
11808 if (htab->glink != NULL && htab->glink->size != 0)
11809 size += 24;
11810 if (size != 0)
11811 size += sizeof (glink_eh_frame_cie);
11812 align = 1;
11813 align <<= htab->glink_eh_frame->output_section->alignment_power;
11814 align -= 1;
11815 size = (size + align) & ~align;
11816 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11817 htab->glink_eh_frame->size = size;
11818 }
11819
11820 if (htab->plt_stub_align != 0)
11821 for (stub_sec = htab->stub_bfd->sections;
11822 stub_sec != NULL;
11823 stub_sec = stub_sec->next)
11824 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11825 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11826 & (-1 << htab->plt_stub_align));
11827
11828 for (stub_sec = htab->stub_bfd->sections;
11829 stub_sec != NULL;
11830 stub_sec = stub_sec->next)
11831 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11832 && stub_sec->rawsize != stub_sec->size)
11833 break;
11834
11835 /* Exit from this loop when no stubs have been added, and no stubs
11836 have changed size. */
11837 if (stub_sec == NULL
11838 && (htab->glink_eh_frame == NULL
11839 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11840 break;
11841
11842 /* Ask the linker to do its stuff. */
11843 (*htab->layout_sections_again) ();
11844 }
11845
11846 maybe_strip_output (info, htab->brlt);
11847 if (htab->glink_eh_frame != NULL)
11848 maybe_strip_output (info, htab->glink_eh_frame);
11849
11850 return TRUE;
11851}
11852
11853/* Called after we have determined section placement. If sections
11854 move, we'll be called again. Provide a value for TOCstart. */
11855
11856bfd_vma
11857ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
11858{
11859 asection *s;
11860 bfd_vma TOCstart;
11861
11862 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11863 order. The TOC starts where the first of these sections starts. */
11864 s = bfd_get_section_by_name (obfd, ".got");
11865 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11866 s = bfd_get_section_by_name (obfd, ".toc");
11867 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11868 s = bfd_get_section_by_name (obfd, ".tocbss");
11869 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11870 s = bfd_get_section_by_name (obfd, ".plt");
11871 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11872 {
11873 /* This may happen for
11874 o references to TOC base (SYM@toc / TOC[tc0]) without a
11875 .toc directive
11876 o bad linker script
11877 o --gc-sections and empty TOC sections
11878
11879 FIXME: Warn user? */
11880
11881 /* Look for a likely section. We probably won't even be
11882 using TOCstart. */
11883 for (s = obfd->sections; s != NULL; s = s->next)
11884 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11885 | SEC_EXCLUDE))
11886 == (SEC_ALLOC | SEC_SMALL_DATA))
11887 break;
11888 if (s == NULL)
11889 for (s = obfd->sections; s != NULL; s = s->next)
11890 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11891 == (SEC_ALLOC | SEC_SMALL_DATA))
11892 break;
11893 if (s == NULL)
11894 for (s = obfd->sections; s != NULL; s = s->next)
11895 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11896 == SEC_ALLOC)
11897 break;
11898 if (s == NULL)
11899 for (s = obfd->sections; s != NULL; s = s->next)
11900 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11901 break;
11902 }
11903
11904 TOCstart = 0;
11905 if (s != NULL)
11906 TOCstart = s->output_section->vma + s->output_offset;
11907
11908 _bfd_set_gp_value (obfd, TOCstart);
11909
11910 if (info != NULL && s != NULL && is_ppc64_elf (obfd))
11911 {
11912 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11913
11914 if (htab != NULL
11915 && htab->elf.hgot != NULL)
11916 {
11917 htab->elf.hgot->root.type = bfd_link_hash_defined;
11918 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
11919 htab->elf.hgot->root.u.def.section = s;
11920 }
11921 }
11922 return TOCstart;
11923}
11924
11925/* Build all the stubs associated with the current output file.
11926 The stubs are kept in a hash table attached to the main linker
11927 hash table. This function is called via gldelf64ppc_finish. */
11928
11929bfd_boolean
11930ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11931 struct bfd_link_info *info,
11932 char **stats)
11933{
11934 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11935 asection *stub_sec;
11936 bfd_byte *p;
11937 int stub_sec_count = 0;
11938
11939 if (htab == NULL)
11940 return FALSE;
11941
11942 htab->emit_stub_syms = emit_stub_syms;
11943
11944 /* Allocate memory to hold the linker stubs. */
11945 for (stub_sec = htab->stub_bfd->sections;
11946 stub_sec != NULL;
11947 stub_sec = stub_sec->next)
11948 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11949 && stub_sec->size != 0)
11950 {
11951 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11952 if (stub_sec->contents == NULL)
11953 return FALSE;
11954 /* We want to check that built size is the same as calculated
11955 size. rawsize is a convenient location to use. */
11956 stub_sec->rawsize = stub_sec->size;
11957 stub_sec->size = 0;
11958 }
11959
11960 if (htab->glink != NULL && htab->glink->size != 0)
11961 {
11962 unsigned int indx;
11963 bfd_vma plt0;
11964
11965 /* Build the .glink plt call stub. */
11966 if (htab->emit_stub_syms)
11967 {
11968 struct elf_link_hash_entry *h;
11969 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11970 TRUE, FALSE, FALSE);
11971 if (h == NULL)
11972 return FALSE;
11973 if (h->root.type == bfd_link_hash_new)
11974 {
11975 h->root.type = bfd_link_hash_defined;
11976 h->root.u.def.section = htab->glink;
11977 h->root.u.def.value = 8;
11978 h->ref_regular = 1;
11979 h->def_regular = 1;
11980 h->ref_regular_nonweak = 1;
11981 h->forced_local = 1;
11982 h->non_elf = 0;
11983 }
11984 }
11985 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11986 if (info->emitrelocations)
11987 {
11988 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11989 if (r == NULL)
11990 return FALSE;
11991 r->r_offset = (htab->glink->output_offset
11992 + htab->glink->output_section->vma);
11993 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11994 r->r_addend = plt0;
11995 }
11996 p = htab->glink->contents;
11997 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11998 bfd_put_64 (htab->glink->owner, plt0, p);
11999 p += 8;
12000 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12001 p += 4;
12002 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12003 p += 4;
12004 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12005 p += 4;
12006 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
12007 p += 4;
12008 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12009 p += 4;
12010 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
12011 p += 4;
12012 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
12013 p += 4;
12014 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
12015 p += 4;
12016 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
12017 p += 4;
12018 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
12019 p += 4;
12020 bfd_put_32 (htab->glink->owner, BCTR, p);
12021 p += 4;
12022 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12023 {
12024 bfd_put_32 (htab->glink->owner, NOP, p);
12025 p += 4;
12026 }
12027
12028 /* Build the .glink lazy link call stubs. */
12029 indx = 0;
12030 while (p < htab->glink->contents + htab->glink->size)
12031 {
12032 if (indx < 0x8000)
12033 {
12034 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12035 p += 4;
12036 }
12037 else
12038 {
12039 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12040 p += 4;
12041 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
12042 p += 4;
12043 }
12044 bfd_put_32 (htab->glink->owner,
12045 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12046 indx++;
12047 p += 4;
12048 }
12049 htab->glink->rawsize = p - htab->glink->contents;
12050 }
12051
12052 if (htab->brlt->size != 0)
12053 {
12054 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12055 htab->brlt->size);
12056 if (htab->brlt->contents == NULL)
12057 return FALSE;
12058 }
12059 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12060 {
12061 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12062 htab->relbrlt->size);
12063 if (htab->relbrlt->contents == NULL)
12064 return FALSE;
12065 }
12066
12067 if (htab->glink_eh_frame != NULL
12068 && htab->glink_eh_frame->size != 0)
12069 {
12070 bfd_vma val;
12071 bfd_byte *last_fde;
12072 size_t last_fde_len, size, align, pad;
12073
12074 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12075 if (p == NULL)
12076 return FALSE;
12077 htab->glink_eh_frame->contents = p;
12078 last_fde = p;
12079
12080 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12081
12082 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12083 /* CIE length (rewrite in case little-endian). */
12084 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12085 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12086 p += sizeof (glink_eh_frame_cie);
12087
12088 for (stub_sec = htab->stub_bfd->sections;
12089 stub_sec != NULL;
12090 stub_sec = stub_sec->next)
12091 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12092 {
12093 last_fde = p;
12094 last_fde_len = 16;
12095 /* FDE length. */
12096 bfd_put_32 (htab->elf.dynobj, 16, p);
12097 p += 4;
12098 /* CIE pointer. */
12099 val = p - htab->glink_eh_frame->contents;
12100 bfd_put_32 (htab->elf.dynobj, val, p);
12101 p += 4;
12102 /* Offset to stub section. */
12103 val = (stub_sec->output_section->vma
12104 + stub_sec->output_offset);
12105 val -= (htab->glink_eh_frame->output_section->vma
12106 + htab->glink_eh_frame->output_offset);
12107 val -= p - htab->glink_eh_frame->contents;
12108 if (val + 0x80000000 > 0xffffffff)
12109 {
12110 info->callbacks->einfo
12111 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12112 stub_sec->name);
12113 return FALSE;
12114 }
12115 bfd_put_32 (htab->elf.dynobj, val, p);
12116 p += 4;
12117 /* stub section size. */
12118 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12119 p += 4;
12120 /* Augmentation. */
12121 p += 1;
12122 /* Pad. */
12123 p += 3;
12124 }
12125 if (htab->glink != NULL && htab->glink->size != 0)
12126 {
12127 last_fde = p;
12128 last_fde_len = 20;
12129 /* FDE length. */
12130 bfd_put_32 (htab->elf.dynobj, 20, p);
12131 p += 4;
12132 /* CIE pointer. */
12133 val = p - htab->glink_eh_frame->contents;
12134 bfd_put_32 (htab->elf.dynobj, val, p);
12135 p += 4;
12136 /* Offset to .glink. */
12137 val = (htab->glink->output_section->vma
12138 + htab->glink->output_offset
12139 + 8);
12140 val -= (htab->glink_eh_frame->output_section->vma
12141 + htab->glink_eh_frame->output_offset);
12142 val -= p - htab->glink_eh_frame->contents;
12143 if (val + 0x80000000 > 0xffffffff)
12144 {
12145 info->callbacks->einfo
12146 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12147 htab->glink->name);
12148 return FALSE;
12149 }
12150 bfd_put_32 (htab->elf.dynobj, val, p);
12151 p += 4;
12152 /* .glink size. */
12153 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
12154 p += 4;
12155 /* Augmentation. */
12156 p += 1;
12157
12158 *p++ = DW_CFA_advance_loc + 1;
12159 *p++ = DW_CFA_register;
12160 *p++ = 65;
12161 *p++ = 12;
12162 *p++ = DW_CFA_advance_loc + 4;
12163 *p++ = DW_CFA_restore_extended;
12164 *p++ = 65;
12165 }
12166 /* Subsume any padding into the last FDE if user .eh_frame
12167 sections are aligned more than glink_eh_frame. Otherwise any
12168 zero padding will be seen as a terminator. */
12169 size = p - htab->glink_eh_frame->contents;
12170 align = 1;
12171 align <<= htab->glink_eh_frame->output_section->alignment_power;
12172 align -= 1;
12173 pad = ((size + align) & ~align) - size;
12174 htab->glink_eh_frame->size = size + pad;
12175 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12176 }
12177
12178 /* Build the stubs as directed by the stub hash table. */
12179 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12180
12181 if (htab->relbrlt != NULL)
12182 htab->relbrlt->reloc_count = 0;
12183
12184 if (htab->plt_stub_align != 0)
12185 for (stub_sec = htab->stub_bfd->sections;
12186 stub_sec != NULL;
12187 stub_sec = stub_sec->next)
12188 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12189 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12190 & (-1 << htab->plt_stub_align));
12191
12192 for (stub_sec = htab->stub_bfd->sections;
12193 stub_sec != NULL;
12194 stub_sec = stub_sec->next)
12195 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12196 {
12197 stub_sec_count += 1;
12198 if (stub_sec->rawsize != stub_sec->size)
12199 break;
12200 }
12201
12202 if (stub_sec != NULL
12203 || htab->glink->rawsize != htab->glink->size
12204 || (htab->glink_eh_frame != NULL
12205 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12206 {
12207 htab->stub_error = TRUE;
12208 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12209 }
12210
12211 if (htab->stub_error)
12212 return FALSE;
12213
12214 if (stats != NULL)
12215 {
12216 *stats = bfd_malloc (500);
12217 if (*stats == NULL)
12218 return FALSE;
12219
12220 sprintf (*stats, _("linker stubs in %u group%s\n"
12221 " branch %lu\n"
12222 " toc adjust %lu\n"
12223 " long branch %lu\n"
12224 " long toc adj %lu\n"
12225 " plt call %lu\n"
12226 " plt call toc %lu"),
12227 stub_sec_count,
12228 stub_sec_count == 1 ? "" : "s",
12229 htab->stub_count[ppc_stub_long_branch - 1],
12230 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12231 htab->stub_count[ppc_stub_plt_branch - 1],
12232 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12233 htab->stub_count[ppc_stub_plt_call - 1],
12234 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12235 }
12236 return TRUE;
12237}
12238
12239/* This function undoes the changes made by add_symbol_adjust. */
12240
12241static bfd_boolean
12242undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12243{
12244 struct ppc_link_hash_entry *eh;
12245
12246 if (h->root.type == bfd_link_hash_indirect)
12247 return TRUE;
12248
12249 eh = (struct ppc_link_hash_entry *) h;
12250 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12251 return TRUE;
12252
12253 eh->elf.root.type = bfd_link_hash_undefined;
12254 return TRUE;
12255}
12256
12257void
12258ppc64_elf_restore_symbols (struct bfd_link_info *info)
12259{
12260 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12261
12262 if (htab != NULL)
12263 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12264}
12265
12266/* What to do when ld finds relocations against symbols defined in
12267 discarded sections. */
12268
12269static unsigned int
12270ppc64_elf_action_discarded (asection *sec)
12271{
12272 if (strcmp (".opd", sec->name) == 0)
12273 return 0;
12274
12275 if (strcmp (".toc", sec->name) == 0)
12276 return 0;
12277
12278 if (strcmp (".toc1", sec->name) == 0)
12279 return 0;
12280
12281 return _bfd_elf_default_action_discarded (sec);
12282}
12283
12284/* The RELOCATE_SECTION function is called by the ELF backend linker
12285 to handle the relocations for a section.
12286
12287 The relocs are always passed as Rela structures; if the section
12288 actually uses Rel structures, the r_addend field will always be
12289 zero.
12290
12291 This function is responsible for adjust the section contents as
12292 necessary, and (if using Rela relocs and generating a
12293 relocatable output file) adjusting the reloc addend as
12294 necessary.
12295
12296 This function does not have to worry about setting the reloc
12297 address or the reloc symbol index.
12298
12299 LOCAL_SYMS is a pointer to the swapped in local symbols.
12300
12301 LOCAL_SECTIONS is an array giving the section in the input file
12302 corresponding to the st_shndx field of each local symbol.
12303
12304 The global hash table entry for the global symbols can be found
12305 via elf_sym_hashes (input_bfd).
12306
12307 When generating relocatable output, this function must handle
12308 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12309 going to be the section symbol corresponding to the output
12310 section, which means that the addend must be adjusted
12311 accordingly. */
12312
12313static bfd_boolean
12314ppc64_elf_relocate_section (bfd *output_bfd,
12315 struct bfd_link_info *info,
12316 bfd *input_bfd,
12317 asection *input_section,
12318 bfd_byte *contents,
12319 Elf_Internal_Rela *relocs,
12320 Elf_Internal_Sym *local_syms,
12321 asection **local_sections)
12322{
12323 struct ppc_link_hash_table *htab;
12324 Elf_Internal_Shdr *symtab_hdr;
12325 struct elf_link_hash_entry **sym_hashes;
12326 Elf_Internal_Rela *rel;
12327 Elf_Internal_Rela *relend;
12328 Elf_Internal_Rela outrel;
12329 bfd_byte *loc;
12330 struct got_entry **local_got_ents;
12331 bfd_vma TOCstart;
12332 bfd_boolean ret = TRUE;
12333 bfd_boolean is_opd;
12334 /* Assume 'at' branch hints. */
12335 bfd_boolean is_isa_v2 = TRUE;
12336 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12337
12338 /* Initialize howto table if needed. */
12339 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12340 ppc_howto_init ();
12341
12342 htab = ppc_hash_table (info);
12343 if (htab == NULL)
12344 return FALSE;
12345
12346 /* Don't relocate stub sections. */
12347 if (input_section->owner == htab->stub_bfd)
12348 return TRUE;
12349
12350 BFD_ASSERT (is_ppc64_elf (input_bfd));
12351
12352 local_got_ents = elf_local_got_ents (input_bfd);
12353 TOCstart = elf_gp (output_bfd);
12354 symtab_hdr = &elf_symtab_hdr (input_bfd);
12355 sym_hashes = elf_sym_hashes (input_bfd);
12356 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12357
12358 rel = relocs;
12359 relend = relocs + input_section->reloc_count;
12360 for (; rel < relend; rel++)
12361 {
12362 enum elf_ppc64_reloc_type r_type;
12363 bfd_vma addend;
12364 bfd_reloc_status_type r;
12365 Elf_Internal_Sym *sym;
12366 asection *sec;
12367 struct elf_link_hash_entry *h_elf;
12368 struct ppc_link_hash_entry *h;
12369 struct ppc_link_hash_entry *fdh;
12370 const char *sym_name;
12371 unsigned long r_symndx, toc_symndx;
12372 bfd_vma toc_addend;
12373 unsigned char tls_mask, tls_gd, tls_type;
12374 unsigned char sym_type;
12375 bfd_vma relocation;
12376 bfd_boolean unresolved_reloc;
12377 bfd_boolean warned;
12378 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12379 unsigned int insn;
12380 unsigned int mask;
12381 struct ppc_stub_hash_entry *stub_entry;
12382 bfd_vma max_br_offset;
12383 bfd_vma from;
12384 const Elf_Internal_Rela orig_rel = *rel;
12385
12386 r_type = ELF64_R_TYPE (rel->r_info);
12387 r_symndx = ELF64_R_SYM (rel->r_info);
12388
12389 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12390 symbol of the previous ADDR64 reloc. The symbol gives us the
12391 proper TOC base to use. */
12392 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12393 && rel != relocs
12394 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12395 && is_opd)
12396 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12397
12398 sym = NULL;
12399 sec = NULL;
12400 h_elf = NULL;
12401 sym_name = NULL;
12402 unresolved_reloc = FALSE;
12403 warned = FALSE;
12404
12405 if (r_symndx < symtab_hdr->sh_info)
12406 {
12407 /* It's a local symbol. */
12408 struct _opd_sec_data *opd;
12409
12410 sym = local_syms + r_symndx;
12411 sec = local_sections[r_symndx];
12412 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12413 sym_type = ELF64_ST_TYPE (sym->st_info);
12414 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12415 opd = get_opd_info (sec);
12416 if (opd != NULL && opd->adjust != NULL)
12417 {
12418 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12419 if (adjust == -1)
12420 relocation = 0;
12421 else
12422 {
12423 /* If this is a relocation against the opd section sym
12424 and we have edited .opd, adjust the reloc addend so
12425 that ld -r and ld --emit-relocs output is correct.
12426 If it is a reloc against some other .opd symbol,
12427 then the symbol value will be adjusted later. */
12428 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12429 rel->r_addend += adjust;
12430 else
12431 relocation += adjust;
12432 }
12433 }
12434 }
12435 else
12436 {
12437 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12438 r_symndx, symtab_hdr, sym_hashes,
12439 h_elf, sec, relocation,
12440 unresolved_reloc, warned);
12441 sym_name = h_elf->root.root.string;
12442 sym_type = h_elf->type;
12443 if (sec != NULL
12444 && sec->owner == output_bfd
12445 && strcmp (sec->name, ".opd") == 0)
12446 {
12447 /* This is a symbol defined in a linker script. All
12448 such are defined in output sections, even those
12449 defined by simple assignment from a symbol defined in
12450 an input section. Transfer the symbol to an
12451 appropriate input .opd section, so that a branch to
12452 this symbol will be mapped to the location specified
12453 by the opd entry. */
12454 struct bfd_link_order *lo;
12455 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
12456 if (lo->type == bfd_indirect_link_order)
12457 {
12458 asection *isec = lo->u.indirect.section;
12459 if (h_elf->root.u.def.value >= isec->output_offset
12460 && h_elf->root.u.def.value < (isec->output_offset
12461 + isec->size))
12462 {
12463 h_elf->root.u.def.value -= isec->output_offset;
12464 h_elf->root.u.def.section = isec;
12465 sec = isec;
12466 break;
12467 }
12468 }
12469 }
12470 }
12471 h = (struct ppc_link_hash_entry *) h_elf;
12472
12473 if (sec != NULL && discarded_section (sec))
12474 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12475 rel, 1, relend,
12476 ppc64_elf_howto_table[r_type], 0,
12477 contents);
12478
12479 if (info->relocatable)
12480 continue;
12481
12482 if (h != NULL && &h->elf == htab->elf.hgot)
12483 {
12484 relocation = (TOCstart
12485 + htab->stub_group[input_section->id].toc_off);
12486 sec = bfd_abs_section_ptr;
12487 unresolved_reloc = FALSE;
12488 }
12489
12490 /* TLS optimizations. Replace instruction sequences and relocs
12491 based on information we collected in tls_optimize. We edit
12492 RELOCS so that --emit-relocs will output something sensible
12493 for the final instruction stream. */
12494 tls_mask = 0;
12495 tls_gd = 0;
12496 toc_symndx = 0;
12497 if (h != NULL)
12498 tls_mask = h->tls_mask;
12499 else if (local_got_ents != NULL)
12500 {
12501 struct plt_entry **local_plt = (struct plt_entry **)
12502 (local_got_ents + symtab_hdr->sh_info);
12503 unsigned char *lgot_masks = (unsigned char *)
12504 (local_plt + symtab_hdr->sh_info);
12505 tls_mask = lgot_masks[r_symndx];
12506 }
12507 if (tls_mask == 0
12508 && (r_type == R_PPC64_TLS
12509 || r_type == R_PPC64_TLSGD
12510 || r_type == R_PPC64_TLSLD))
12511 {
12512 /* Check for toc tls entries. */
12513 unsigned char *toc_tls;
12514
12515 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12516 &local_syms, rel, input_bfd))
12517 return FALSE;
12518
12519 if (toc_tls)
12520 tls_mask = *toc_tls;
12521 }
12522
12523 /* Check that tls relocs are used with tls syms, and non-tls
12524 relocs are used with non-tls syms. */
12525 if (r_symndx != STN_UNDEF
12526 && r_type != R_PPC64_NONE
12527 && (h == NULL
12528 || h->elf.root.type == bfd_link_hash_defined
12529 || h->elf.root.type == bfd_link_hash_defweak)
12530 && (IS_PPC64_TLS_RELOC (r_type)
12531 != (sym_type == STT_TLS
12532 || (sym_type == STT_SECTION
12533 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12534 {
12535 if (tls_mask != 0
12536 && (r_type == R_PPC64_TLS
12537 || r_type == R_PPC64_TLSGD
12538 || r_type == R_PPC64_TLSLD))
12539 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12540 ;
12541 else
12542 info->callbacks->einfo
12543 (!IS_PPC64_TLS_RELOC (r_type)
12544 ? _("%P: %H: %s used with TLS symbol `%T'\n")
12545 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
12546 input_bfd, input_section, rel->r_offset,
12547 ppc64_elf_howto_table[r_type]->name,
12548 sym_name);
12549 }
12550
12551 /* Ensure reloc mapping code below stays sane. */
12552 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12553 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12554 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12555 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12556 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12557 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12558 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12559 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12560 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12561 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12562 abort ();
12563
12564 switch (r_type)
12565 {
12566 default:
12567 break;
12568
12569 case R_PPC64_LO_DS_OPT:
12570 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12571 if ((insn & (0x3f << 26)) != 58u << 26)
12572 abort ();
12573 insn += (14u << 26) - (58u << 26);
12574 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12575 r_type = R_PPC64_TOC16_LO;
12576 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12577 break;
12578
12579 case R_PPC64_TOC16:
12580 case R_PPC64_TOC16_LO:
12581 case R_PPC64_TOC16_DS:
12582 case R_PPC64_TOC16_LO_DS:
12583 {
12584 /* Check for toc tls entries. */
12585 unsigned char *toc_tls;
12586 int retval;
12587
12588 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12589 &local_syms, rel, input_bfd);
12590 if (retval == 0)
12591 return FALSE;
12592
12593 if (toc_tls)
12594 {
12595 tls_mask = *toc_tls;
12596 if (r_type == R_PPC64_TOC16_DS
12597 || r_type == R_PPC64_TOC16_LO_DS)
12598 {
12599 if (tls_mask != 0
12600 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12601 goto toctprel;
12602 }
12603 else
12604 {
12605 /* If we found a GD reloc pair, then we might be
12606 doing a GD->IE transition. */
12607 if (retval == 2)
12608 {
12609 tls_gd = TLS_TPRELGD;
12610 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12611 goto tls_ldgd_opt;
12612 }
12613 else if (retval == 3)
12614 {
12615 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12616 goto tls_ldgd_opt;
12617 }
12618 }
12619 }
12620 }
12621 break;
12622
12623 case R_PPC64_GOT_TPREL16_HI:
12624 case R_PPC64_GOT_TPREL16_HA:
12625 if (tls_mask != 0
12626 && (tls_mask & TLS_TPREL) == 0)
12627 {
12628 rel->r_offset -= d_offset;
12629 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12630 r_type = R_PPC64_NONE;
12631 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12632 }
12633 break;
12634
12635 case R_PPC64_GOT_TPREL16_DS:
12636 case R_PPC64_GOT_TPREL16_LO_DS:
12637 if (tls_mask != 0
12638 && (tls_mask & TLS_TPREL) == 0)
12639 {
12640 toctprel:
12641 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12642 insn &= 31 << 21;
12643 insn |= 0x3c0d0000; /* addis 0,13,0 */
12644 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12645 r_type = R_PPC64_TPREL16_HA;
12646 if (toc_symndx != 0)
12647 {
12648 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12649 rel->r_addend = toc_addend;
12650 /* We changed the symbol. Start over in order to
12651 get h, sym, sec etc. right. */
12652 rel--;
12653 continue;
12654 }
12655 else
12656 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12657 }
12658 break;
12659
12660 case R_PPC64_TLS:
12661 if (tls_mask != 0
12662 && (tls_mask & TLS_TPREL) == 0)
12663 {
12664 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12665 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12666 if (insn == 0)
12667 abort ();
12668 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12669 /* Was PPC64_TLS which sits on insn boundary, now
12670 PPC64_TPREL16_LO which is at low-order half-word. */
12671 rel->r_offset += d_offset;
12672 r_type = R_PPC64_TPREL16_LO;
12673 if (toc_symndx != 0)
12674 {
12675 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12676 rel->r_addend = toc_addend;
12677 /* We changed the symbol. Start over in order to
12678 get h, sym, sec etc. right. */
12679 rel--;
12680 continue;
12681 }
12682 else
12683 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12684 }
12685 break;
12686
12687 case R_PPC64_GOT_TLSGD16_HI:
12688 case R_PPC64_GOT_TLSGD16_HA:
12689 tls_gd = TLS_TPRELGD;
12690 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12691 goto tls_gdld_hi;
12692 break;
12693
12694 case R_PPC64_GOT_TLSLD16_HI:
12695 case R_PPC64_GOT_TLSLD16_HA:
12696 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12697 {
12698 tls_gdld_hi:
12699 if ((tls_mask & tls_gd) != 0)
12700 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12701 + R_PPC64_GOT_TPREL16_DS);
12702 else
12703 {
12704 rel->r_offset -= d_offset;
12705 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12706 r_type = R_PPC64_NONE;
12707 }
12708 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12709 }
12710 break;
12711
12712 case R_PPC64_GOT_TLSGD16:
12713 case R_PPC64_GOT_TLSGD16_LO:
12714 tls_gd = TLS_TPRELGD;
12715 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12716 goto tls_ldgd_opt;
12717 break;
12718
12719 case R_PPC64_GOT_TLSLD16:
12720 case R_PPC64_GOT_TLSLD16_LO:
12721 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12722 {
12723 unsigned int insn1, insn2, insn3;
12724 bfd_vma offset;
12725
12726 tls_ldgd_opt:
12727 offset = (bfd_vma) -1;
12728 /* If not using the newer R_PPC64_TLSGD/LD to mark
12729 __tls_get_addr calls, we must trust that the call
12730 stays with its arg setup insns, ie. that the next
12731 reloc is the __tls_get_addr call associated with
12732 the current reloc. Edit both insns. */
12733 if (input_section->has_tls_get_addr_call
12734 && rel + 1 < relend
12735 && branch_reloc_hash_match (input_bfd, rel + 1,
12736 htab->tls_get_addr,
12737 htab->tls_get_addr_fd))
12738 offset = rel[1].r_offset;
12739 if ((tls_mask & tls_gd) != 0)
12740 {
12741 /* IE */
12742 insn1 = bfd_get_32 (output_bfd,
12743 contents + rel->r_offset - d_offset);
12744 insn1 &= (1 << 26) - (1 << 2);
12745 insn1 |= 58 << 26; /* ld */
12746 insn2 = 0x7c636a14; /* add 3,3,13 */
12747 if (offset != (bfd_vma) -1)
12748 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12749 if ((tls_mask & TLS_EXPLICIT) == 0)
12750 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12751 + R_PPC64_GOT_TPREL16_DS);
12752 else
12753 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12754 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12755 }
12756 else
12757 {
12758 /* LE */
12759 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12760 insn2 = 0x38630000; /* addi 3,3,0 */
12761 if (tls_gd == 0)
12762 {
12763 /* Was an LD reloc. */
12764 if (toc_symndx)
12765 sec = local_sections[toc_symndx];
12766 for (r_symndx = 0;
12767 r_symndx < symtab_hdr->sh_info;
12768 r_symndx++)
12769 if (local_sections[r_symndx] == sec)
12770 break;
12771 if (r_symndx >= symtab_hdr->sh_info)
12772 r_symndx = STN_UNDEF;
12773 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12774 if (r_symndx != STN_UNDEF)
12775 rel->r_addend -= (local_syms[r_symndx].st_value
12776 + sec->output_offset
12777 + sec->output_section->vma);
12778 }
12779 else if (toc_symndx != 0)
12780 {
12781 r_symndx = toc_symndx;
12782 rel->r_addend = toc_addend;
12783 }
12784 r_type = R_PPC64_TPREL16_HA;
12785 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12786 if (offset != (bfd_vma) -1)
12787 {
12788 rel[1].r_info = ELF64_R_INFO (r_symndx,
12789 R_PPC64_TPREL16_LO);
12790 rel[1].r_offset = offset + d_offset;
12791 rel[1].r_addend = rel->r_addend;
12792 }
12793 }
12794 bfd_put_32 (output_bfd, insn1,
12795 contents + rel->r_offset - d_offset);
12796 if (offset != (bfd_vma) -1)
12797 {
12798 insn3 = bfd_get_32 (output_bfd,
12799 contents + offset + 4);
12800 if (insn3 == NOP
12801 || insn3 == CROR_151515 || insn3 == CROR_313131)
12802 {
12803 rel[1].r_offset += 4;
12804 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12805 insn2 = NOP;
12806 }
12807 bfd_put_32 (output_bfd, insn2, contents + offset);
12808 }
12809 if ((tls_mask & tls_gd) == 0
12810 && (tls_gd == 0 || toc_symndx != 0))
12811 {
12812 /* We changed the symbol. Start over in order
12813 to get h, sym, sec etc. right. */
12814 rel--;
12815 continue;
12816 }
12817 }
12818 break;
12819
12820 case R_PPC64_TLSGD:
12821 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12822 {
12823 unsigned int insn2, insn3;
12824 bfd_vma offset = rel->r_offset;
12825
12826 if ((tls_mask & TLS_TPRELGD) != 0)
12827 {
12828 /* IE */
12829 r_type = R_PPC64_NONE;
12830 insn2 = 0x7c636a14; /* add 3,3,13 */
12831 }
12832 else
12833 {
12834 /* LE */
12835 if (toc_symndx != 0)
12836 {
12837 r_symndx = toc_symndx;
12838 rel->r_addend = toc_addend;
12839 }
12840 r_type = R_PPC64_TPREL16_LO;
12841 rel->r_offset = offset + d_offset;
12842 insn2 = 0x38630000; /* addi 3,3,0 */
12843 }
12844 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12845 /* Zap the reloc on the _tls_get_addr call too. */
12846 BFD_ASSERT (offset == rel[1].r_offset);
12847 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12848 insn3 = bfd_get_32 (output_bfd,
12849 contents + offset + 4);
12850 if (insn3 == NOP
12851 || insn3 == CROR_151515 || insn3 == CROR_313131)
12852 {
12853 rel->r_offset += 4;
12854 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12855 insn2 = NOP;
12856 }
12857 bfd_put_32 (output_bfd, insn2, contents + offset);
12858 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12859 {
12860 rel--;
12861 continue;
12862 }
12863 }
12864 break;
12865
12866 case R_PPC64_TLSLD:
12867 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12868 {
12869 unsigned int insn2, insn3;
12870 bfd_vma offset = rel->r_offset;
12871
12872 if (toc_symndx)
12873 sec = local_sections[toc_symndx];
12874 for (r_symndx = 0;
12875 r_symndx < symtab_hdr->sh_info;
12876 r_symndx++)
12877 if (local_sections[r_symndx] == sec)
12878 break;
12879 if (r_symndx >= symtab_hdr->sh_info)
12880 r_symndx = STN_UNDEF;
12881 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12882 if (r_symndx != STN_UNDEF)
12883 rel->r_addend -= (local_syms[r_symndx].st_value
12884 + sec->output_offset
12885 + sec->output_section->vma);
12886
12887 r_type = R_PPC64_TPREL16_LO;
12888 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12889 rel->r_offset = offset + d_offset;
12890 /* Zap the reloc on the _tls_get_addr call too. */
12891 BFD_ASSERT (offset == rel[1].r_offset);
12892 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12893 insn2 = 0x38630000; /* addi 3,3,0 */
12894 insn3 = bfd_get_32 (output_bfd,
12895 contents + offset + 4);
12896 if (insn3 == NOP
12897 || insn3 == CROR_151515 || insn3 == CROR_313131)
12898 {
12899 rel->r_offset += 4;
12900 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12901 insn2 = NOP;
12902 }
12903 bfd_put_32 (output_bfd, insn2, contents + offset);
12904 rel--;
12905 continue;
12906 }
12907 break;
12908
12909 case R_PPC64_DTPMOD64:
12910 if (rel + 1 < relend
12911 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12912 && rel[1].r_offset == rel->r_offset + 8)
12913 {
12914 if ((tls_mask & TLS_GD) == 0)
12915 {
12916 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12917 if ((tls_mask & TLS_TPRELGD) != 0)
12918 r_type = R_PPC64_TPREL64;
12919 else
12920 {
12921 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12922 r_type = R_PPC64_NONE;
12923 }
12924 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12925 }
12926 }
12927 else
12928 {
12929 if ((tls_mask & TLS_LD) == 0)
12930 {
12931 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12932 r_type = R_PPC64_NONE;
12933 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12934 }
12935 }
12936 break;
12937
12938 case R_PPC64_TPREL64:
12939 if ((tls_mask & TLS_TPREL) == 0)
12940 {
12941 r_type = R_PPC64_NONE;
12942 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12943 }
12944 break;
12945 }
12946
12947 /* Handle other relocations that tweak non-addend part of insn. */
12948 insn = 0;
12949 max_br_offset = 1 << 25;
12950 addend = rel->r_addend;
12951 reloc_dest = DEST_NORMAL;
12952 switch (r_type)
12953 {
12954 default:
12955 break;
12956
12957 case R_PPC64_TOCSAVE:
12958 if (relocation + addend == (rel->r_offset
12959 + input_section->output_offset
12960 + input_section->output_section->vma)
12961 && tocsave_find (htab, NO_INSERT,
12962 &local_syms, rel, input_bfd))
12963 {
12964 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12965 if (insn == NOP
12966 || insn == CROR_151515 || insn == CROR_313131)
12967 bfd_put_32 (input_bfd, STD_R2_40R1,
12968 contents + rel->r_offset);
12969 }
12970 break;
12971
12972 /* Branch taken prediction relocations. */
12973 case R_PPC64_ADDR14_BRTAKEN:
12974 case R_PPC64_REL14_BRTAKEN:
12975 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12976 /* Fall thru. */
12977
12978 /* Branch not taken prediction relocations. */
12979 case R_PPC64_ADDR14_BRNTAKEN:
12980 case R_PPC64_REL14_BRNTAKEN:
12981 insn |= bfd_get_32 (output_bfd,
12982 contents + rel->r_offset) & ~(0x01 << 21);
12983 /* Fall thru. */
12984
12985 case R_PPC64_REL14:
12986 max_br_offset = 1 << 15;
12987 /* Fall thru. */
12988
12989 case R_PPC64_REL24:
12990 /* Calls to functions with a different TOC, such as calls to
12991 shared objects, need to alter the TOC pointer. This is
12992 done using a linkage stub. A REL24 branching to these
12993 linkage stubs needs to be followed by a nop, as the nop
12994 will be replaced with an instruction to restore the TOC
12995 base pointer. */
12996 fdh = h;
12997 if (h != NULL
12998 && h->oh != NULL
12999 && h->oh->is_func_descriptor)
13000 fdh = ppc_follow_link (h->oh);
13001 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13002 htab);
13003 if (stub_entry != NULL
13004 && (stub_entry->stub_type == ppc_stub_plt_call
13005 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13006 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13007 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13008 {
13009 bfd_boolean can_plt_call = FALSE;
13010
13011 if (rel->r_offset + 8 <= input_section->size)
13012 {
13013 unsigned long nop;
13014 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13015 if (nop == NOP
13016 || nop == CROR_151515 || nop == CROR_313131)
13017 {
13018 if (h != NULL
13019 && (h == htab->tls_get_addr_fd
13020 || h == htab->tls_get_addr)
13021 && !htab->no_tls_get_addr_opt)
13022 {
13023 /* Special stub used, leave nop alone. */
13024 }
13025 else
13026 bfd_put_32 (input_bfd, LD_R2_40R1,
13027 contents + rel->r_offset + 4);
13028 can_plt_call = TRUE;
13029 }
13030 }
13031
13032 if (!can_plt_call)
13033 {
13034 if (stub_entry->stub_type == ppc_stub_plt_call
13035 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13036 {
13037 /* If this is a plain branch rather than a branch
13038 and link, don't require a nop. However, don't
13039 allow tail calls in a shared library as they
13040 will result in r2 being corrupted. */
13041 unsigned long br;
13042 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
13043 if (info->executable && (br & 1) == 0)
13044 can_plt_call = TRUE;
13045 else
13046 stub_entry = NULL;
13047 }
13048 else if (h != NULL
13049 && strcmp (h->elf.root.root.string,
13050 ".__libc_start_main") == 0)
13051 {
13052 /* Allow crt1 branch to go via a toc adjusting stub. */
13053 can_plt_call = TRUE;
13054 }
13055 else
13056 {
13057 info->callbacks->einfo
13058 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13059 "recompile with -fPIC"),
13060 input_bfd, input_section, rel->r_offset, sym_name);
13061
13062 bfd_set_error (bfd_error_bad_value);
13063 ret = FALSE;
13064 }
13065 }
13066
13067 if (can_plt_call
13068 && (stub_entry->stub_type == ppc_stub_plt_call
13069 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13070 unresolved_reloc = FALSE;
13071 }
13072
13073 if ((stub_entry == NULL
13074 || stub_entry->stub_type == ppc_stub_long_branch
13075 || stub_entry->stub_type == ppc_stub_plt_branch)
13076 && get_opd_info (sec) != NULL)
13077 {
13078 /* The branch destination is the value of the opd entry. */
13079 bfd_vma off = (relocation + addend
13080 - sec->output_section->vma
13081 - sec->output_offset);
13082 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13083 if (dest != (bfd_vma) -1)
13084 {
13085 relocation = dest;
13086 addend = 0;
13087 reloc_dest = DEST_OPD;
13088 }
13089 }
13090
13091 /* If the branch is out of reach we ought to have a long
13092 branch stub. */
13093 from = (rel->r_offset
13094 + input_section->output_offset
13095 + input_section->output_section->vma);
13096
13097 if (stub_entry != NULL
13098 && (stub_entry->stub_type == ppc_stub_long_branch
13099 || stub_entry->stub_type == ppc_stub_plt_branch)
13100 && (r_type == R_PPC64_ADDR14_BRTAKEN
13101 || r_type == R_PPC64_ADDR14_BRNTAKEN
13102 || (relocation + addend - from + max_br_offset
13103 < 2 * max_br_offset)))
13104 /* Don't use the stub if this branch is in range. */
13105 stub_entry = NULL;
13106
13107 if (stub_entry != NULL)
13108 {
13109 /* Munge up the value and addend so that we call the stub
13110 rather than the procedure directly. */
13111 relocation = (stub_entry->stub_offset
13112 + stub_entry->stub_sec->output_offset
13113 + stub_entry->stub_sec->output_section->vma);
13114 addend = 0;
13115 reloc_dest = DEST_STUB;
13116
13117 if ((stub_entry->stub_type == ppc_stub_plt_call
13118 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13119 && (ALWAYS_EMIT_R2SAVE
13120 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13121 && rel + 1 < relend
13122 && rel[1].r_offset == rel->r_offset + 4
13123 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13124 relocation += 4;
13125 }
13126
13127 if (insn != 0)
13128 {
13129 if (is_isa_v2)
13130 {
13131 /* Set 'a' bit. This is 0b00010 in BO field for branch
13132 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13133 for branch on CTR insns (BO == 1a00t or 1a01t). */
13134 if ((insn & (0x14 << 21)) == (0x04 << 21))
13135 insn |= 0x02 << 21;
13136 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13137 insn |= 0x08 << 21;
13138 else
13139 break;
13140 }
13141 else
13142 {
13143 /* Invert 'y' bit if not the default. */
13144 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13145 insn ^= 0x01 << 21;
13146 }
13147
13148 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13149 }
13150
13151 /* NOP out calls to undefined weak functions.
13152 We can thus call a weak function without first
13153 checking whether the function is defined. */
13154 else if (h != NULL
13155 && h->elf.root.type == bfd_link_hash_undefweak
13156 && h->elf.dynindx == -1
13157 && r_type == R_PPC64_REL24
13158 && relocation == 0
13159 && addend == 0)
13160 {
13161 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13162 continue;
13163 }
13164 break;
13165 }
13166
13167 /* Set `addend'. */
13168 tls_type = 0;
13169 switch (r_type)
13170 {
13171 default:
13172 info->callbacks->einfo
13173 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13174 input_bfd, (int) r_type, sym_name);
13175
13176 bfd_set_error (bfd_error_bad_value);
13177 ret = FALSE;
13178 continue;
13179
13180 case R_PPC64_NONE:
13181 case R_PPC64_TLS:
13182 case R_PPC64_TLSGD:
13183 case R_PPC64_TLSLD:
13184 case R_PPC64_TOCSAVE:
13185 case R_PPC64_GNU_VTINHERIT:
13186 case R_PPC64_GNU_VTENTRY:
13187 continue;
13188
13189 /* GOT16 relocations. Like an ADDR16 using the symbol's
13190 address in the GOT as relocation value instead of the
13191 symbol's value itself. Also, create a GOT entry for the
13192 symbol and put the symbol value there. */
13193 case R_PPC64_GOT_TLSGD16:
13194 case R_PPC64_GOT_TLSGD16_LO:
13195 case R_PPC64_GOT_TLSGD16_HI:
13196 case R_PPC64_GOT_TLSGD16_HA:
13197 tls_type = TLS_TLS | TLS_GD;
13198 goto dogot;
13199
13200 case R_PPC64_GOT_TLSLD16:
13201 case R_PPC64_GOT_TLSLD16_LO:
13202 case R_PPC64_GOT_TLSLD16_HI:
13203 case R_PPC64_GOT_TLSLD16_HA:
13204 tls_type = TLS_TLS | TLS_LD;
13205 goto dogot;
13206
13207 case R_PPC64_GOT_TPREL16_DS:
13208 case R_PPC64_GOT_TPREL16_LO_DS:
13209 case R_PPC64_GOT_TPREL16_HI:
13210 case R_PPC64_GOT_TPREL16_HA:
13211 tls_type = TLS_TLS | TLS_TPREL;
13212 goto dogot;
13213
13214 case R_PPC64_GOT_DTPREL16_DS:
13215 case R_PPC64_GOT_DTPREL16_LO_DS:
13216 case R_PPC64_GOT_DTPREL16_HI:
13217 case R_PPC64_GOT_DTPREL16_HA:
13218 tls_type = TLS_TLS | TLS_DTPREL;
13219 goto dogot;
13220
13221 case R_PPC64_GOT16:
13222 case R_PPC64_GOT16_LO:
13223 case R_PPC64_GOT16_HI:
13224 case R_PPC64_GOT16_HA:
13225 case R_PPC64_GOT16_DS:
13226 case R_PPC64_GOT16_LO_DS:
13227 dogot:
13228 {
13229 /* Relocation is to the entry for this symbol in the global
13230 offset table. */
13231 asection *got;
13232 bfd_vma *offp;
13233 bfd_vma off;
13234 unsigned long indx = 0;
13235 struct got_entry *ent;
13236
13237 if (tls_type == (TLS_TLS | TLS_LD)
13238 && (h == NULL
13239 || !h->elf.def_dynamic))
13240 ent = ppc64_tlsld_got (input_bfd);
13241 else
13242 {
13243
13244 if (h != NULL)
13245 {
13246 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13247 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13248 &h->elf)
13249 || (info->shared
13250 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13251 /* This is actually a static link, or it is a
13252 -Bsymbolic link and the symbol is defined
13253 locally, or the symbol was forced to be local
13254 because of a version file. */
13255 ;
13256 else
13257 {
13258 BFD_ASSERT (h->elf.dynindx != -1);
13259 indx = h->elf.dynindx;
13260 unresolved_reloc = FALSE;
13261 }
13262 ent = h->elf.got.glist;
13263 }
13264 else
13265 {
13266 if (local_got_ents == NULL)
13267 abort ();
13268 ent = local_got_ents[r_symndx];
13269 }
13270
13271 for (; ent != NULL; ent = ent->next)
13272 if (ent->addend == orig_rel.r_addend
13273 && ent->owner == input_bfd
13274 && ent->tls_type == tls_type)
13275 break;
13276 }
13277
13278 if (ent == NULL)
13279 abort ();
13280 if (ent->is_indirect)
13281 ent = ent->got.ent;
13282 offp = &ent->got.offset;
13283 got = ppc64_elf_tdata (ent->owner)->got;
13284 if (got == NULL)
13285 abort ();
13286
13287 /* The offset must always be a multiple of 8. We use the
13288 least significant bit to record whether we have already
13289 processed this entry. */
13290 off = *offp;
13291 if ((off & 1) != 0)
13292 off &= ~1;
13293 else
13294 {
13295 /* Generate relocs for the dynamic linker, except in
13296 the case of TLSLD where we'll use one entry per
13297 module. */
13298 asection *relgot;
13299 bfd_boolean ifunc;
13300
13301 *offp = off | 1;
13302 relgot = NULL;
13303 ifunc = (h != NULL
13304 ? h->elf.type == STT_GNU_IFUNC
13305 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13306 if (ifunc)
13307 relgot = htab->reliplt;
13308 else if ((info->shared || indx != 0)
13309 && (h == NULL
13310 || (tls_type == (TLS_TLS | TLS_LD)
13311 && !h->elf.def_dynamic)
13312 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13313 || h->elf.root.type != bfd_link_hash_undefweak))
13314 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13315 if (relgot != NULL)
13316 {
13317 outrel.r_offset = (got->output_section->vma
13318 + got->output_offset
13319 + off);
13320 outrel.r_addend = addend;
13321 if (tls_type & (TLS_LD | TLS_GD))
13322 {
13323 outrel.r_addend = 0;
13324 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13325 if (tls_type == (TLS_TLS | TLS_GD))
13326 {
13327 loc = relgot->contents;
13328 loc += (relgot->reloc_count++
13329 * sizeof (Elf64_External_Rela));
13330 bfd_elf64_swap_reloca_out (output_bfd,
13331 &outrel, loc);
13332 outrel.r_offset += 8;
13333 outrel.r_addend = addend;
13334 outrel.r_info
13335 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13336 }
13337 }
13338 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13339 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13340 else if (tls_type == (TLS_TLS | TLS_TPREL))
13341 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13342 else if (indx != 0)
13343 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13344 else
13345 {
13346 if (ifunc)
13347 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13348 else
13349 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13350
13351 /* Write the .got section contents for the sake
13352 of prelink. */
13353 loc = got->contents + off;
13354 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13355 loc);
13356 }
13357
13358 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13359 {
13360 outrel.r_addend += relocation;
13361 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13362 outrel.r_addend -= htab->elf.tls_sec->vma;
13363 }
13364 loc = relgot->contents;
13365 loc += (relgot->reloc_count++
13366 * sizeof (Elf64_External_Rela));
13367 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13368 }
13369
13370 /* Init the .got section contents here if we're not
13371 emitting a reloc. */
13372 else
13373 {
13374 relocation += addend;
13375 if (tls_type == (TLS_TLS | TLS_LD))
13376 relocation = 1;
13377 else if (tls_type != 0)
13378 {
13379 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13380 if (tls_type == (TLS_TLS | TLS_TPREL))
13381 relocation += DTP_OFFSET - TP_OFFSET;
13382
13383 if (tls_type == (TLS_TLS | TLS_GD))
13384 {
13385 bfd_put_64 (output_bfd, relocation,
13386 got->contents + off + 8);
13387 relocation = 1;
13388 }
13389 }
13390
13391 bfd_put_64 (output_bfd, relocation,
13392 got->contents + off);
13393 }
13394 }
13395
13396 if (off >= (bfd_vma) -2)
13397 abort ();
13398
13399 relocation = got->output_section->vma + got->output_offset + off;
13400 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13401 }
13402 break;
13403
13404 case R_PPC64_PLT16_HA:
13405 case R_PPC64_PLT16_HI:
13406 case R_PPC64_PLT16_LO:
13407 case R_PPC64_PLT32:
13408 case R_PPC64_PLT64:
13409 /* Relocation is to the entry for this symbol in the
13410 procedure linkage table. */
13411
13412 /* Resolve a PLT reloc against a local symbol directly,
13413 without using the procedure linkage table. */
13414 if (h == NULL)
13415 break;
13416
13417 /* It's possible that we didn't make a PLT entry for this
13418 symbol. This happens when statically linking PIC code,
13419 or when using -Bsymbolic. Go find a match if there is a
13420 PLT entry. */
13421 if (htab->plt != NULL)
13422 {
13423 struct plt_entry *ent;
13424 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13425 if (ent->addend == orig_rel.r_addend
13426 && ent->plt.offset != (bfd_vma) -1)
13427 {
13428 relocation = (htab->plt->output_section->vma
13429 + htab->plt->output_offset
13430 + ent->plt.offset);
13431 unresolved_reloc = FALSE;
13432 }
13433 }
13434 break;
13435
13436 case R_PPC64_TOC:
13437 /* Relocation value is TOC base. */
13438 relocation = TOCstart;
13439 if (r_symndx == STN_UNDEF)
13440 relocation += htab->stub_group[input_section->id].toc_off;
13441 else if (unresolved_reloc)
13442 ;
13443 else if (sec != NULL && sec->id <= htab->top_id)
13444 relocation += htab->stub_group[sec->id].toc_off;
13445 else
13446 unresolved_reloc = TRUE;
13447 goto dodyn;
13448
13449 /* TOC16 relocs. We want the offset relative to the TOC base,
13450 which is the address of the start of the TOC plus 0x8000.
13451 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13452 in this order. */
13453 case R_PPC64_TOC16:
13454 case R_PPC64_TOC16_LO:
13455 case R_PPC64_TOC16_HI:
13456 case R_PPC64_TOC16_DS:
13457 case R_PPC64_TOC16_LO_DS:
13458 case R_PPC64_TOC16_HA:
13459 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13460 break;
13461
13462 /* Relocate against the beginning of the section. */
13463 case R_PPC64_SECTOFF:
13464 case R_PPC64_SECTOFF_LO:
13465 case R_PPC64_SECTOFF_HI:
13466 case R_PPC64_SECTOFF_DS:
13467 case R_PPC64_SECTOFF_LO_DS:
13468 case R_PPC64_SECTOFF_HA:
13469 if (sec != NULL)
13470 addend -= sec->output_section->vma;
13471 break;
13472
13473 case R_PPC64_REL16:
13474 case R_PPC64_REL16_LO:
13475 case R_PPC64_REL16_HI:
13476 case R_PPC64_REL16_HA:
13477 break;
13478
13479 case R_PPC64_REL14:
13480 case R_PPC64_REL14_BRNTAKEN:
13481 case R_PPC64_REL14_BRTAKEN:
13482 case R_PPC64_REL24:
13483 break;
13484
13485 case R_PPC64_TPREL16:
13486 case R_PPC64_TPREL16_LO:
13487 case R_PPC64_TPREL16_HI:
13488 case R_PPC64_TPREL16_HA:
13489 case R_PPC64_TPREL16_DS:
13490 case R_PPC64_TPREL16_LO_DS:
13491 case R_PPC64_TPREL16_HIGHER:
13492 case R_PPC64_TPREL16_HIGHERA:
13493 case R_PPC64_TPREL16_HIGHEST:
13494 case R_PPC64_TPREL16_HIGHESTA:
13495 if (h != NULL
13496 && h->elf.root.type == bfd_link_hash_undefweak
13497 && h->elf.dynindx == -1)
13498 {
13499 /* Make this relocation against an undefined weak symbol
13500 resolve to zero. This is really just a tweak, since
13501 code using weak externs ought to check that they are
13502 defined before using them. */
13503 bfd_byte *p = contents + rel->r_offset - d_offset;
13504
13505 insn = bfd_get_32 (output_bfd, p);
13506 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13507 if (insn != 0)
13508 bfd_put_32 (output_bfd, insn, p);
13509 break;
13510 }
13511 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13512 if (info->shared)
13513 /* The TPREL16 relocs shouldn't really be used in shared
13514 libs as they will result in DT_TEXTREL being set, but
13515 support them anyway. */
13516 goto dodyn;
13517 break;
13518
13519 case R_PPC64_DTPREL16:
13520 case R_PPC64_DTPREL16_LO:
13521 case R_PPC64_DTPREL16_HI:
13522 case R_PPC64_DTPREL16_HA:
13523 case R_PPC64_DTPREL16_DS:
13524 case R_PPC64_DTPREL16_LO_DS:
13525 case R_PPC64_DTPREL16_HIGHER:
13526 case R_PPC64_DTPREL16_HIGHERA:
13527 case R_PPC64_DTPREL16_HIGHEST:
13528 case R_PPC64_DTPREL16_HIGHESTA:
13529 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13530 break;
13531
13532 case R_PPC64_DTPMOD64:
13533 relocation = 1;
13534 addend = 0;
13535 goto dodyn;
13536
13537 case R_PPC64_TPREL64:
13538 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13539 goto dodyn;
13540
13541 case R_PPC64_DTPREL64:
13542 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13543 /* Fall thru */
13544
13545 /* Relocations that may need to be propagated if this is a
13546 dynamic object. */
13547 case R_PPC64_REL30:
13548 case R_PPC64_REL32:
13549 case R_PPC64_REL64:
13550 case R_PPC64_ADDR14:
13551 case R_PPC64_ADDR14_BRNTAKEN:
13552 case R_PPC64_ADDR14_BRTAKEN:
13553 case R_PPC64_ADDR16:
13554 case R_PPC64_ADDR16_DS:
13555 case R_PPC64_ADDR16_HA:
13556 case R_PPC64_ADDR16_HI:
13557 case R_PPC64_ADDR16_HIGHER:
13558 case R_PPC64_ADDR16_HIGHERA:
13559 case R_PPC64_ADDR16_HIGHEST:
13560 case R_PPC64_ADDR16_HIGHESTA:
13561 case R_PPC64_ADDR16_LO:
13562 case R_PPC64_ADDR16_LO_DS:
13563 case R_PPC64_ADDR24:
13564 case R_PPC64_ADDR32:
13565 case R_PPC64_ADDR64:
13566 case R_PPC64_UADDR16:
13567 case R_PPC64_UADDR32:
13568 case R_PPC64_UADDR64:
13569 dodyn:
13570 if ((input_section->flags & SEC_ALLOC) == 0)
13571 break;
13572
13573 if (NO_OPD_RELOCS && is_opd)
13574 break;
13575
13576 if ((info->shared
13577 && (h == NULL
13578 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13579 || h->elf.root.type != bfd_link_hash_undefweak)
13580 && (must_be_dyn_reloc (info, r_type)
13581 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13582 || (ELIMINATE_COPY_RELOCS
13583 && !info->shared
13584 && h != NULL
13585 && h->elf.dynindx != -1
13586 && !h->elf.non_got_ref
13587 && !h->elf.def_regular)
13588 || (!info->shared
13589 && (h != NULL
13590 ? h->elf.type == STT_GNU_IFUNC
13591 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13592 {
13593 bfd_boolean skip, relocate;
13594 asection *sreloc;
13595 bfd_vma out_off;
13596
13597 /* When generating a dynamic object, these relocations
13598 are copied into the output file to be resolved at run
13599 time. */
13600
13601 skip = FALSE;
13602 relocate = FALSE;
13603
13604 out_off = _bfd_elf_section_offset (output_bfd, info,
13605 input_section, rel->r_offset);
13606 if (out_off == (bfd_vma) -1)
13607 skip = TRUE;
13608 else if (out_off == (bfd_vma) -2)
13609 skip = TRUE, relocate = TRUE;
13610 out_off += (input_section->output_section->vma
13611 + input_section->output_offset);
13612 outrel.r_offset = out_off;
13613 outrel.r_addend = rel->r_addend;
13614
13615 /* Optimize unaligned reloc use. */
13616 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13617 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13618 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13619 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13620 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13621 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13622 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13623 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13624 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13625
13626 if (skip)
13627 memset (&outrel, 0, sizeof outrel);
13628 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13629 && !is_opd
13630 && r_type != R_PPC64_TOC)
13631 {
13632 BFD_ASSERT (h->elf.dynindx != -1);
13633 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13634 }
13635 else
13636 {
13637 /* This symbol is local, or marked to become local,
13638 or this is an opd section reloc which must point
13639 at a local function. */
13640 outrel.r_addend += relocation;
13641 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13642 {
13643 if (is_opd && h != NULL)
13644 {
13645 /* Lie about opd entries. This case occurs
13646 when building shared libraries and we
13647 reference a function in another shared
13648 lib. The same thing happens for a weak
13649 definition in an application that's
13650 overridden by a strong definition in a
13651 shared lib. (I believe this is a generic
13652 bug in binutils handling of weak syms.)
13653 In these cases we won't use the opd
13654 entry in this lib. */
13655 unresolved_reloc = FALSE;
13656 }
13657 if (!is_opd
13658 && r_type == R_PPC64_ADDR64
13659 && (h != NULL
13660 ? h->elf.type == STT_GNU_IFUNC
13661 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13662 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13663 else
13664 {
13665 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13666
13667 /* We need to relocate .opd contents for ld.so.
13668 Prelink also wants simple and consistent rules
13669 for relocs. This make all RELATIVE relocs have
13670 *r_offset equal to r_addend. */
13671 relocate = TRUE;
13672 }
13673 }
13674 else
13675 {
13676 long indx = 0;
13677
13678 if (h != NULL
13679 ? h->elf.type == STT_GNU_IFUNC
13680 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13681 {
13682 info->callbacks->einfo
13683 (_("%P: %H: %s for indirect "
13684 "function `%T' unsupported\n"),
13685 input_bfd, input_section, rel->r_offset,
13686 ppc64_elf_howto_table[r_type]->name,
13687 sym_name);
13688 ret = FALSE;
13689 }
13690 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13691 ;
13692 else if (sec == NULL || sec->owner == NULL)
13693 {
13694 bfd_set_error (bfd_error_bad_value);
13695 return FALSE;
13696 }
13697 else
13698 {
13699 asection *osec;
13700
13701 osec = sec->output_section;
13702 indx = elf_section_data (osec)->dynindx;
13703
13704 if (indx == 0)
13705 {
13706 if ((osec->flags & SEC_READONLY) == 0
13707 && htab->elf.data_index_section != NULL)
13708 osec = htab->elf.data_index_section;
13709 else
13710 osec = htab->elf.text_index_section;
13711 indx = elf_section_data (osec)->dynindx;
13712 }
13713 BFD_ASSERT (indx != 0);
13714
13715 /* We are turning this relocation into one
13716 against a section symbol, so subtract out
13717 the output section's address but not the
13718 offset of the input section in the output
13719 section. */
13720 outrel.r_addend -= osec->vma;
13721 }
13722
13723 outrel.r_info = ELF64_R_INFO (indx, r_type);
13724 }
13725 }
13726
13727 sreloc = elf_section_data (input_section)->sreloc;
13728 if (h != NULL
13729 ? h->elf.type == STT_GNU_IFUNC
13730 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13731 sreloc = htab->reliplt;
13732 if (sreloc == NULL)
13733 abort ();
13734
13735 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13736 >= sreloc->size)
13737 abort ();
13738 loc = sreloc->contents;
13739 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13740 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13741
13742 /* If this reloc is against an external symbol, it will
13743 be computed at runtime, so there's no need to do
13744 anything now. However, for the sake of prelink ensure
13745 that the section contents are a known value. */
13746 if (! relocate)
13747 {
13748 unresolved_reloc = FALSE;
13749 /* The value chosen here is quite arbitrary as ld.so
13750 ignores section contents except for the special
13751 case of .opd where the contents might be accessed
13752 before relocation. Choose zero, as that won't
13753 cause reloc overflow. */
13754 relocation = 0;
13755 addend = 0;
13756 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13757 to improve backward compatibility with older
13758 versions of ld. */
13759 if (r_type == R_PPC64_ADDR64)
13760 addend = outrel.r_addend;
13761 /* Adjust pc_relative relocs to have zero in *r_offset. */
13762 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13763 addend = (input_section->output_section->vma
13764 + input_section->output_offset
13765 + rel->r_offset);
13766 }
13767 }
13768 break;
13769
13770 case R_PPC64_COPY:
13771 case R_PPC64_GLOB_DAT:
13772 case R_PPC64_JMP_SLOT:
13773 case R_PPC64_JMP_IREL:
13774 case R_PPC64_RELATIVE:
13775 /* We shouldn't ever see these dynamic relocs in relocatable
13776 files. */
13777 /* Fall through. */
13778
13779 case R_PPC64_PLTGOT16:
13780 case R_PPC64_PLTGOT16_DS:
13781 case R_PPC64_PLTGOT16_HA:
13782 case R_PPC64_PLTGOT16_HI:
13783 case R_PPC64_PLTGOT16_LO:
13784 case R_PPC64_PLTGOT16_LO_DS:
13785 case R_PPC64_PLTREL32:
13786 case R_PPC64_PLTREL64:
13787 /* These ones haven't been implemented yet. */
13788
13789 info->callbacks->einfo
13790 (_("%P: %B: %s is not supported for `%T'\n"),
13791 input_bfd,
13792 ppc64_elf_howto_table[r_type]->name, sym_name);
13793
13794 bfd_set_error (bfd_error_invalid_operation);
13795 ret = FALSE;
13796 continue;
13797 }
13798
13799 /* Multi-instruction sequences that access the TOC can be
13800 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13801 to nop; addi rb,r2,x; */
13802 switch (r_type)
13803 {
13804 default:
13805 break;
13806
13807 case R_PPC64_GOT_TLSLD16_HI:
13808 case R_PPC64_GOT_TLSGD16_HI:
13809 case R_PPC64_GOT_TPREL16_HI:
13810 case R_PPC64_GOT_DTPREL16_HI:
13811 case R_PPC64_GOT16_HI:
13812 case R_PPC64_TOC16_HI:
13813 /* These relocs would only be useful if building up an
13814 offset to later add to r2, perhaps in an indexed
13815 addressing mode instruction. Don't try to optimize.
13816 Unfortunately, the possibility of someone building up an
13817 offset like this or even with the HA relocs, means that
13818 we need to check the high insn when optimizing the low
13819 insn. */
13820 break;
13821
13822 case R_PPC64_GOT_TLSLD16_HA:
13823 case R_PPC64_GOT_TLSGD16_HA:
13824 case R_PPC64_GOT_TPREL16_HA:
13825 case R_PPC64_GOT_DTPREL16_HA:
13826 case R_PPC64_GOT16_HA:
13827 case R_PPC64_TOC16_HA:
13828 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13829 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13830 {
13831 bfd_byte *p = contents + (rel->r_offset & ~3);
13832 bfd_put_32 (input_bfd, NOP, p);
13833 }
13834 break;
13835
13836 case R_PPC64_GOT_TLSLD16_LO:
13837 case R_PPC64_GOT_TLSGD16_LO:
13838 case R_PPC64_GOT_TPREL16_LO_DS:
13839 case R_PPC64_GOT_DTPREL16_LO_DS:
13840 case R_PPC64_GOT16_LO:
13841 case R_PPC64_GOT16_LO_DS:
13842 case R_PPC64_TOC16_LO:
13843 case R_PPC64_TOC16_LO_DS:
13844 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13845 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13846 {
13847 bfd_byte *p = contents + (rel->r_offset & ~3);
13848 insn = bfd_get_32 (input_bfd, p);
13849 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13850 {
13851 /* Transform addic to addi when we change reg. */
13852 insn &= ~((0x3f << 26) | (0x1f << 16));
13853 insn |= (14u << 26) | (2 << 16);
13854 }
13855 else
13856 {
13857 insn &= ~(0x1f << 16);
13858 insn |= 2 << 16;
13859 }
13860 bfd_put_32 (input_bfd, insn, p);
13861 }
13862 break;
13863 }
13864
13865 /* Do any further special processing. */
13866 switch (r_type)
13867 {
13868 default:
13869 break;
13870
13871 case R_PPC64_ADDR16_HA:
13872 case R_PPC64_REL16_HA:
13873 case R_PPC64_ADDR16_HIGHERA:
13874 case R_PPC64_ADDR16_HIGHESTA:
13875 case R_PPC64_TOC16_HA:
13876 case R_PPC64_SECTOFF_HA:
13877 case R_PPC64_TPREL16_HA:
13878 case R_PPC64_DTPREL16_HA:
13879 case R_PPC64_TPREL16_HIGHER:
13880 case R_PPC64_TPREL16_HIGHERA:
13881 case R_PPC64_TPREL16_HIGHEST:
13882 case R_PPC64_TPREL16_HIGHESTA:
13883 case R_PPC64_DTPREL16_HIGHER:
13884 case R_PPC64_DTPREL16_HIGHERA:
13885 case R_PPC64_DTPREL16_HIGHEST:
13886 case R_PPC64_DTPREL16_HIGHESTA:
13887 /* It's just possible that this symbol is a weak symbol
13888 that's not actually defined anywhere. In that case,
13889 'sec' would be NULL, and we should leave the symbol
13890 alone (it will be set to zero elsewhere in the link). */
13891 if (sec == NULL)
13892 break;
13893 /* Fall thru */
13894
13895 case R_PPC64_GOT16_HA:
13896 case R_PPC64_PLTGOT16_HA:
13897 case R_PPC64_PLT16_HA:
13898 case R_PPC64_GOT_TLSGD16_HA:
13899 case R_PPC64_GOT_TLSLD16_HA:
13900 case R_PPC64_GOT_TPREL16_HA:
13901 case R_PPC64_GOT_DTPREL16_HA:
13902 /* Add 0x10000 if sign bit in 0:15 is set.
13903 Bits 0:15 are not used. */
13904 addend += 0x8000;
13905 break;
13906
13907 case R_PPC64_ADDR16_DS:
13908 case R_PPC64_ADDR16_LO_DS:
13909 case R_PPC64_GOT16_DS:
13910 case R_PPC64_GOT16_LO_DS:
13911 case R_PPC64_PLT16_LO_DS:
13912 case R_PPC64_SECTOFF_DS:
13913 case R_PPC64_SECTOFF_LO_DS:
13914 case R_PPC64_TOC16_DS:
13915 case R_PPC64_TOC16_LO_DS:
13916 case R_PPC64_PLTGOT16_DS:
13917 case R_PPC64_PLTGOT16_LO_DS:
13918 case R_PPC64_GOT_TPREL16_DS:
13919 case R_PPC64_GOT_TPREL16_LO_DS:
13920 case R_PPC64_GOT_DTPREL16_DS:
13921 case R_PPC64_GOT_DTPREL16_LO_DS:
13922 case R_PPC64_TPREL16_DS:
13923 case R_PPC64_TPREL16_LO_DS:
13924 case R_PPC64_DTPREL16_DS:
13925 case R_PPC64_DTPREL16_LO_DS:
13926 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13927 mask = 3;
13928 /* If this reloc is against an lq insn, then the value must be
13929 a multiple of 16. This is somewhat of a hack, but the
13930 "correct" way to do this by defining _DQ forms of all the
13931 _DS relocs bloats all reloc switches in this file. It
13932 doesn't seem to make much sense to use any of these relocs
13933 in data, so testing the insn should be safe. */
13934 if ((insn & (0x3f << 26)) == (56u << 26))
13935 mask = 15;
13936 if (((relocation + addend) & mask) != 0)
13937 {
13938 info->callbacks->einfo
13939 (_("%P: %H: error: %s not a multiple of %u\n"),
13940 input_bfd, input_section, rel->r_offset,
13941 ppc64_elf_howto_table[r_type]->name,
13942 mask + 1);
13943 bfd_set_error (bfd_error_bad_value);
13944 ret = FALSE;
13945 continue;
13946 }
13947 break;
13948 }
13949
13950 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13951 because such sections are not SEC_ALLOC and thus ld.so will
13952 not process them. */
13953 if (unresolved_reloc
13954 && !((input_section->flags & SEC_DEBUGGING) != 0
13955 && h->elf.def_dynamic)
13956 && _bfd_elf_section_offset (output_bfd, info, input_section,
13957 rel->r_offset) != (bfd_vma) -1)
13958 {
13959 info->callbacks->einfo
13960 (_("%P: %H: unresolvable %s against `%T'\n"),
13961 input_bfd, input_section, rel->r_offset,
13962 ppc64_elf_howto_table[(int) r_type]->name,
13963 h->elf.root.root.string);
13964 ret = FALSE;
13965 }
13966
13967 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13968 input_bfd,
13969 input_section,
13970 contents,
13971 rel->r_offset,
13972 relocation,
13973 addend);
13974
13975 if (r != bfd_reloc_ok)
13976 {
13977 char *more_info = NULL;
13978 const char *reloc_name = ppc64_elf_howto_table[r_type]->name;
13979
13980 if (reloc_dest != DEST_NORMAL)
13981 {
13982 more_info = bfd_malloc (strlen (reloc_name) + 8);
13983 if (more_info != NULL)
13984 {
13985 strcpy (more_info, reloc_name);
13986 strcat (more_info, (reloc_dest == DEST_OPD
13987 ? " (OPD)" : " (stub)"));
13988 reloc_name = more_info;
13989 }
13990 }
13991
13992 if (r == bfd_reloc_overflow)
13993 {
13994 if (warned)
13995 continue;
13996 if (h != NULL
13997 && h->elf.root.type == bfd_link_hash_undefweak
13998 && ppc64_elf_howto_table[r_type]->pc_relative)
13999 {
14000 /* Assume this is a call protected by other code that
14001 detects the symbol is undefined. If this is the case,
14002 we can safely ignore the overflow. If not, the
14003 program is hosed anyway, and a little warning isn't
14004 going to help. */
14005
14006 continue;
14007 }
14008
14009 if (!((*info->callbacks->reloc_overflow)
14010 (info, &h->elf.root, sym_name,
14011 reloc_name, orig_rel.r_addend,
14012 input_bfd, input_section, rel->r_offset)))
14013 return FALSE;
14014 }
14015 else
14016 {
14017 info->callbacks->einfo
14018 (_("%P: %H: %s against `%T': error %d\n"),
14019 input_bfd, input_section, rel->r_offset,
14020 reloc_name, sym_name, (int) r);
14021 ret = FALSE;
14022 }
14023 if (more_info != NULL)
14024 free (more_info);
14025 }
14026 }
14027
14028 /* If we're emitting relocations, then shortly after this function
14029 returns, reloc offsets and addends for this section will be
14030 adjusted. Worse, reloc symbol indices will be for the output
14031 file rather than the input. Save a copy of the relocs for
14032 opd_entry_value. */
14033 if (is_opd && (info->emitrelocations || info->relocatable))
14034 {
14035 bfd_size_type amt;
14036 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14037 rel = bfd_alloc (input_bfd, amt);
14038 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
14039 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
14040 if (rel == NULL)
14041 return FALSE;
14042 memcpy (rel, relocs, amt);
14043 }
14044 return ret;
14045}
14046
14047/* Adjust the value of any local symbols in opd sections. */
14048
14049static int
14050ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14051 const char *name ATTRIBUTE_UNUSED,
14052 Elf_Internal_Sym *elfsym,
14053 asection *input_sec,
14054 struct elf_link_hash_entry *h)
14055{
14056 struct _opd_sec_data *opd;
14057 long adjust;
14058 bfd_vma value;
14059
14060 if (h != NULL)
14061 return 1;
14062
14063 opd = get_opd_info (input_sec);
14064 if (opd == NULL || opd->adjust == NULL)
14065 return 1;
14066
14067 value = elfsym->st_value - input_sec->output_offset;
14068 if (!info->relocatable)
14069 value -= input_sec->output_section->vma;
14070
14071 adjust = opd->adjust[value / 8];
14072 if (adjust == -1)
14073 return 2;
14074
14075 elfsym->st_value += adjust;
14076 return 1;
14077}
14078
14079/* Finish up dynamic symbol handling. We set the contents of various
14080 dynamic sections here. */
14081
14082static bfd_boolean
14083ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14084 struct bfd_link_info *info,
14085 struct elf_link_hash_entry *h,
14086 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14087{
14088 struct ppc_link_hash_table *htab;
14089 struct plt_entry *ent;
14090 Elf_Internal_Rela rela;
14091 bfd_byte *loc;
14092
14093 htab = ppc_hash_table (info);
14094 if (htab == NULL)
14095 return FALSE;
14096
14097 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14098 if (ent->plt.offset != (bfd_vma) -1)
14099 {
14100 /* This symbol has an entry in the procedure linkage
14101 table. Set it up. */
14102 if (!htab->elf.dynamic_sections_created
14103 || h->dynindx == -1)
14104 {
14105 BFD_ASSERT (h->type == STT_GNU_IFUNC
14106 && h->def_regular
14107 && (h->root.type == bfd_link_hash_defined
14108 || h->root.type == bfd_link_hash_defweak));
14109 rela.r_offset = (htab->iplt->output_section->vma
14110 + htab->iplt->output_offset
14111 + ent->plt.offset);
14112 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14113 rela.r_addend = (h->root.u.def.value
14114 + h->root.u.def.section->output_offset
14115 + h->root.u.def.section->output_section->vma
14116 + ent->addend);
14117 loc = (htab->reliplt->contents
14118 + (htab->reliplt->reloc_count++
14119 * sizeof (Elf64_External_Rela)));
14120 }
14121 else
14122 {
14123 rela.r_offset = (htab->plt->output_section->vma
14124 + htab->plt->output_offset
14125 + ent->plt.offset);
14126 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14127 rela.r_addend = ent->addend;
14128 loc = (htab->relplt->contents
14129 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
14130 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
14131 }
14132 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14133 }
14134
14135 if (h->needs_copy)
14136 {
14137 /* This symbol needs a copy reloc. Set it up. */
14138
14139 if (h->dynindx == -1
14140 || (h->root.type != bfd_link_hash_defined
14141 && h->root.type != bfd_link_hash_defweak)
14142 || htab->relbss == NULL)
14143 abort ();
14144
14145 rela.r_offset = (h->root.u.def.value
14146 + h->root.u.def.section->output_section->vma
14147 + h->root.u.def.section->output_offset);
14148 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14149 rela.r_addend = 0;
14150 loc = htab->relbss->contents;
14151 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14152 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14153 }
14154
14155 return TRUE;
14156}
14157
14158/* Used to decide how to sort relocs in an optimal manner for the
14159 dynamic linker, before writing them out. */
14160
14161static enum elf_reloc_type_class
14162ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14163 const asection *rel_sec,
14164 const Elf_Internal_Rela *rela)
14165{
14166 enum elf_ppc64_reloc_type r_type;
14167 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14168
14169 if (rel_sec == htab->reliplt)
14170 return reloc_class_ifunc;
14171
14172 r_type = ELF64_R_TYPE (rela->r_info);
14173 switch (r_type)
14174 {
14175 case R_PPC64_RELATIVE:
14176 return reloc_class_relative;
14177 case R_PPC64_JMP_SLOT:
14178 return reloc_class_plt;
14179 case R_PPC64_COPY:
14180 return reloc_class_copy;
14181 default:
14182 return reloc_class_normal;
14183 }
14184}
14185
14186/* Finish up the dynamic sections. */
14187
14188static bfd_boolean
14189ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14190 struct bfd_link_info *info)
14191{
14192 struct ppc_link_hash_table *htab;
14193 bfd *dynobj;
14194 asection *sdyn;
14195
14196 htab = ppc_hash_table (info);
14197 if (htab == NULL)
14198 return FALSE;
14199
14200 dynobj = htab->elf.dynobj;
14201 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14202
14203 if (htab->elf.dynamic_sections_created)
14204 {
14205 Elf64_External_Dyn *dyncon, *dynconend;
14206
14207 if (sdyn == NULL || htab->got == NULL)
14208 abort ();
14209
14210 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14211 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14212 for (; dyncon < dynconend; dyncon++)
14213 {
14214 Elf_Internal_Dyn dyn;
14215 asection *s;
14216
14217 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14218
14219 switch (dyn.d_tag)
14220 {
14221 default:
14222 continue;
14223
14224 case DT_PPC64_GLINK:
14225 s = htab->glink;
14226 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14227 /* We stupidly defined DT_PPC64_GLINK to be the start
14228 of glink rather than the first entry point, which is
14229 what ld.so needs, and now have a bigger stub to
14230 support automatic multiple TOCs. */
14231 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
14232 break;
14233
14234 case DT_PPC64_OPD:
14235 s = bfd_get_section_by_name (output_bfd, ".opd");
14236 if (s == NULL)
14237 continue;
14238 dyn.d_un.d_ptr = s->vma;
14239 break;
14240
14241 case DT_PPC64_OPDSZ:
14242 s = bfd_get_section_by_name (output_bfd, ".opd");
14243 if (s == NULL)
14244 continue;
14245 dyn.d_un.d_val = s->size;
14246 break;
14247
14248 case DT_PLTGOT:
14249 s = htab->plt;
14250 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14251 break;
14252
14253 case DT_JMPREL:
14254 s = htab->relplt;
14255 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14256 break;
14257
14258 case DT_PLTRELSZ:
14259 dyn.d_un.d_val = htab->relplt->size;
14260 break;
14261
14262 case DT_RELASZ:
14263 /* Don't count procedure linkage table relocs in the
14264 overall reloc count. */
14265 s = htab->relplt;
14266 if (s == NULL)
14267 continue;
14268 dyn.d_un.d_val -= s->size;
14269 break;
14270
14271 case DT_RELA:
14272 /* We may not be using the standard ELF linker script.
14273 If .rela.plt is the first .rela section, we adjust
14274 DT_RELA to not include it. */
14275 s = htab->relplt;
14276 if (s == NULL)
14277 continue;
14278 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14279 continue;
14280 dyn.d_un.d_ptr += s->size;
14281 break;
14282 }
14283
14284 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14285 }
14286 }
14287
14288 if (htab->got != NULL && htab->got->size != 0)
14289 {
14290 /* Fill in the first entry in the global offset table.
14291 We use it to hold the link-time TOCbase. */
14292 bfd_put_64 (output_bfd,
14293 elf_gp (output_bfd) + TOC_BASE_OFF,
14294 htab->got->contents);
14295
14296 /* Set .got entry size. */
14297 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14298 }
14299
14300 if (htab->plt != NULL && htab->plt->size != 0)
14301 {
14302 /* Set .plt entry size. */
14303 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14304 = PLT_ENTRY_SIZE;
14305 }
14306
14307 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14308 brlt ourselves if emitrelocations. */
14309 if (htab->brlt != NULL
14310 && htab->brlt->reloc_count != 0
14311 && !_bfd_elf_link_output_relocs (output_bfd,
14312 htab->brlt,
14313 elf_section_data (htab->brlt)->rela.hdr,
14314 elf_section_data (htab->brlt)->relocs,
14315 NULL))
14316 return FALSE;
14317
14318 if (htab->glink != NULL
14319 && htab->glink->reloc_count != 0
14320 && !_bfd_elf_link_output_relocs (output_bfd,
14321 htab->glink,
14322 elf_section_data (htab->glink)->rela.hdr,
14323 elf_section_data (htab->glink)->relocs,
14324 NULL))
14325 return FALSE;
14326
14327
14328 if (htab->glink_eh_frame != NULL
14329 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
14330 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14331 htab->glink_eh_frame,
14332 htab->glink_eh_frame->contents))
14333 return FALSE;
14334
14335 /* We need to handle writing out multiple GOT sections ourselves,
14336 since we didn't add them to DYNOBJ. We know dynobj is the first
14337 bfd. */
14338 while ((dynobj = dynobj->link_next) != NULL)
14339 {
14340 asection *s;
14341
14342 if (!is_ppc64_elf (dynobj))
14343 continue;
14344
14345 s = ppc64_elf_tdata (dynobj)->got;
14346 if (s != NULL
14347 && s->size != 0
14348 && s->output_section != bfd_abs_section_ptr
14349 && !bfd_set_section_contents (output_bfd, s->output_section,
14350 s->contents, s->output_offset,
14351 s->size))
14352 return FALSE;
14353 s = ppc64_elf_tdata (dynobj)->relgot;
14354 if (s != NULL
14355 && s->size != 0
14356 && s->output_section != bfd_abs_section_ptr
14357 && !bfd_set_section_contents (output_bfd, s->output_section,
14358 s->contents, s->output_offset,
14359 s->size))
14360 return FALSE;
14361 }
14362
14363 return TRUE;
14364}
14365
14366#include "elf64-target.h"
14367
14368/* FreeBSD support */
14369
14370#undef TARGET_LITTLE_SYM
14371#undef TARGET_LITTLE_NAME
14372
14373#undef TARGET_BIG_SYM
14374#define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14375#undef TARGET_BIG_NAME
14376#define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14377
14378#undef ELF_OSABI
14379#define ELF_OSABI ELFOSABI_FREEBSD
14380
14381#undef elf64_bed
14382#define elf64_bed elf64_powerpc_fbsd_bed
14383
14384#include "elf64-target.h"
14385
GDB Binutils - Deliverables
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