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.
8 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
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 */
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
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
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
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
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
121 /* The name of the dynamic interpreter. This is put in the .interp
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE 24
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
131 /* TOC base pointers offset from start of TOC. */
132 #define TOC_BASE_OFF 0x8000
134 /* Offset of tp and dtp pointers from start of TLS block. */
135 #define TP_OFFSET 0x7000
136 #define DTP_OFFSET 0x8000
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 */
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 */
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+ */
163 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
164 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
166 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
168 /* glink call stub instructions. We enter with the index in R0. */
169 #define GLINK_CALL_STUB_SIZE (16*4)
173 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
174 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
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 */
187 #define NOP 0x60000000
189 /* Some other nops. */
190 #define CROR_151515 0x4def7b82
191 #define CROR_313131 0x4ffffb82
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 . */
197 /* After that, we need two instructions to load the index, followed by
199 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
200 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
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 */
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
223 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
225 /* Relocation HOWTO's. */
226 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
228 static reloc_howto_type ppc64_elf_howto_raw[] = {
229 /* This reloc does nothing. */
230 HOWTO (R_PPC64_NONE, /* type */
232 2, /* size (0 = byte, 1 = short, 2 = long) */
234 FALSE, /* pc_relative */
236 complain_overflow_dont, /* complain_on_overflow */
237 bfd_elf_generic_reloc, /* special_function */
238 "R_PPC64_NONE", /* name */
239 FALSE, /* partial_inplace */
242 FALSE), /* pcrel_offset */
244 /* A standard 32 bit relocation. */
245 HOWTO (R_PPC64_ADDR32, /* type */
247 2, /* size (0 = byte, 1 = short, 2 = long) */
249 FALSE, /* pc_relative */
251 complain_overflow_bitfield, /* complain_on_overflow */
252 bfd_elf_generic_reloc, /* special_function */
253 "R_PPC64_ADDR32", /* name */
254 FALSE, /* partial_inplace */
256 0xffffffff, /* dst_mask */
257 FALSE), /* pcrel_offset */
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 */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
265 FALSE, /* pc_relative */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_PPC64_ADDR24", /* name */
270 FALSE, /* partial_inplace */
272 0x03fffffc, /* dst_mask */
273 FALSE), /* pcrel_offset */
275 /* A standard 16 bit relocation. */
276 HOWTO (R_PPC64_ADDR16, /* type */
278 1, /* size (0 = byte, 1 = short, 2 = long) */
280 FALSE, /* pc_relative */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_PPC64_ADDR16", /* name */
285 FALSE, /* partial_inplace */
287 0xffff, /* dst_mask */
288 FALSE), /* pcrel_offset */
290 /* A 16 bit relocation without overflow. */
291 HOWTO (R_PPC64_ADDR16_LO, /* type */
293 1, /* size (0 = byte, 1 = short, 2 = long) */
295 FALSE, /* pc_relative */
297 complain_overflow_dont,/* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_PPC64_ADDR16_LO", /* name */
300 FALSE, /* partial_inplace */
302 0xffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
305 /* Bits 16-31 of an address. */
306 HOWTO (R_PPC64_ADDR16_HI, /* type */
308 1, /* size (0 = byte, 1 = short, 2 = long) */
310 FALSE, /* pc_relative */
312 complain_overflow_dont, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_PPC64_ADDR16_HI", /* name */
315 FALSE, /* partial_inplace */
317 0xffff, /* dst_mask */
318 FALSE), /* pcrel_offset */
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 */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
326 FALSE, /* pc_relative */
328 complain_overflow_dont, /* complain_on_overflow */
329 ppc64_elf_ha_reloc, /* special_function */
330 "R_PPC64_ADDR16_HA", /* name */
331 FALSE, /* partial_inplace */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
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 */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
342 FALSE, /* pc_relative */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 ppc64_elf_branch_reloc, /* special_function */
346 "R_PPC64_ADDR14", /* name */
347 FALSE, /* partial_inplace */
349 0x0000fffc, /* dst_mask */
350 FALSE), /* pcrel_offset */
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 */
357 2, /* size (0 = byte, 1 = short, 2 = long) */
359 FALSE, /* pc_relative */
361 complain_overflow_bitfield, /* complain_on_overflow */
362 ppc64_elf_brtaken_reloc, /* special_function */
363 "R_PPC64_ADDR14_BRTAKEN",/* name */
364 FALSE, /* partial_inplace */
366 0x0000fffc, /* dst_mask */
367 FALSE), /* pcrel_offset */
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 */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
376 FALSE, /* pc_relative */
378 complain_overflow_bitfield, /* complain_on_overflow */
379 ppc64_elf_brtaken_reloc, /* special_function */
380 "R_PPC64_ADDR14_BRNTAKEN",/* name */
381 FALSE, /* partial_inplace */
383 0x0000fffc, /* dst_mask */
384 FALSE), /* pcrel_offset */
386 /* A relative 26 bit branch; the lower two bits must be zero. */
387 HOWTO (R_PPC64_REL24, /* type */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
391 TRUE, /* pc_relative */
393 complain_overflow_signed, /* complain_on_overflow */
394 ppc64_elf_branch_reloc, /* special_function */
395 "R_PPC64_REL24", /* name */
396 FALSE, /* partial_inplace */
398 0x03fffffc, /* dst_mask */
399 TRUE), /* pcrel_offset */
401 /* A relative 16 bit branch; the lower two bits must be zero. */
402 HOWTO (R_PPC64_REL14, /* type */
404 2, /* size (0 = byte, 1 = short, 2 = long) */
406 TRUE, /* pc_relative */
408 complain_overflow_signed, /* complain_on_overflow */
409 ppc64_elf_branch_reloc, /* special_function */
410 "R_PPC64_REL14", /* name */
411 FALSE, /* partial_inplace */
413 0x0000fffc, /* dst_mask */
414 TRUE), /* pcrel_offset */
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
419 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
423 TRUE, /* pc_relative */
425 complain_overflow_signed, /* complain_on_overflow */
426 ppc64_elf_brtaken_reloc, /* special_function */
427 "R_PPC64_REL14_BRTAKEN", /* name */
428 FALSE, /* partial_inplace */
430 0x0000fffc, /* dst_mask */
431 TRUE), /* pcrel_offset */
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
436 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 TRUE, /* pc_relative */
442 complain_overflow_signed, /* complain_on_overflow */
443 ppc64_elf_brtaken_reloc, /* special_function */
444 "R_PPC64_REL14_BRNTAKEN",/* name */
445 FALSE, /* partial_inplace */
447 0x0000fffc, /* dst_mask */
448 TRUE), /* pcrel_offset */
450 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
452 HOWTO (R_PPC64_GOT16, /* type */
454 1, /* size (0 = byte, 1 = short, 2 = long) */
456 FALSE, /* pc_relative */
458 complain_overflow_signed, /* complain_on_overflow */
459 ppc64_elf_unhandled_reloc, /* special_function */
460 "R_PPC64_GOT16", /* name */
461 FALSE, /* partial_inplace */
463 0xffff, /* dst_mask */
464 FALSE), /* pcrel_offset */
466 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
468 HOWTO (R_PPC64_GOT16_LO, /* type */
470 1, /* size (0 = byte, 1 = short, 2 = long) */
472 FALSE, /* pc_relative */
474 complain_overflow_dont, /* complain_on_overflow */
475 ppc64_elf_unhandled_reloc, /* special_function */
476 "R_PPC64_GOT16_LO", /* name */
477 FALSE, /* partial_inplace */
479 0xffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
482 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
484 HOWTO (R_PPC64_GOT16_HI, /* type */
486 1, /* size (0 = byte, 1 = short, 2 = long) */
488 FALSE, /* pc_relative */
490 complain_overflow_dont,/* complain_on_overflow */
491 ppc64_elf_unhandled_reloc, /* special_function */
492 "R_PPC64_GOT16_HI", /* name */
493 FALSE, /* partial_inplace */
495 0xffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
498 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
500 HOWTO (R_PPC64_GOT16_HA, /* type */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
504 FALSE, /* pc_relative */
506 complain_overflow_dont,/* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16_HA", /* name */
509 FALSE, /* partial_inplace */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
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 */
521 0, /* this one is variable size */
523 FALSE, /* pc_relative */
525 complain_overflow_dont, /* complain_on_overflow */
526 ppc64_elf_unhandled_reloc, /* special_function */
527 "R_PPC64_COPY", /* name */
528 FALSE, /* partial_inplace */
531 FALSE), /* pcrel_offset */
533 /* Like R_PPC64_ADDR64, but used when setting global offset table
535 HOWTO (R_PPC64_GLOB_DAT, /* type */
537 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
539 FALSE, /* pc_relative */
541 complain_overflow_dont, /* complain_on_overflow */
542 ppc64_elf_unhandled_reloc, /* special_function */
543 "R_PPC64_GLOB_DAT", /* name */
544 FALSE, /* partial_inplace */
546 ONES (64), /* dst_mask */
547 FALSE), /* pcrel_offset */
549 /* Created by the link editor. Marks a procedure linkage table
550 entry for a symbol. */
551 HOWTO (R_PPC64_JMP_SLOT, /* type */
553 0, /* size (0 = byte, 1 = short, 2 = long) */
555 FALSE, /* pc_relative */
557 complain_overflow_dont, /* complain_on_overflow */
558 ppc64_elf_unhandled_reloc, /* special_function */
559 "R_PPC64_JMP_SLOT", /* name */
560 FALSE, /* partial_inplace */
563 FALSE), /* pcrel_offset */
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
568 HOWTO (R_PPC64_RELATIVE, /* type */
570 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
572 FALSE, /* pc_relative */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_PPC64_RELATIVE", /* name */
577 FALSE, /* partial_inplace */
579 ONES (64), /* dst_mask */
580 FALSE), /* pcrel_offset */
582 /* Like R_PPC64_ADDR32, but may be unaligned. */
583 HOWTO (R_PPC64_UADDR32, /* type */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
587 FALSE, /* pc_relative */
589 complain_overflow_bitfield, /* complain_on_overflow */
590 bfd_elf_generic_reloc, /* special_function */
591 "R_PPC64_UADDR32", /* name */
592 FALSE, /* partial_inplace */
594 0xffffffff, /* dst_mask */
595 FALSE), /* pcrel_offset */
597 /* Like R_PPC64_ADDR16, but may be unaligned. */
598 HOWTO (R_PPC64_UADDR16, /* type */
600 1, /* size (0 = byte, 1 = short, 2 = long) */
602 FALSE, /* pc_relative */
604 complain_overflow_bitfield, /* complain_on_overflow */
605 bfd_elf_generic_reloc, /* special_function */
606 "R_PPC64_UADDR16", /* name */
607 FALSE, /* partial_inplace */
609 0xffff, /* dst_mask */
610 FALSE), /* pcrel_offset */
612 /* 32-bit PC relative. */
613 HOWTO (R_PPC64_REL32, /* type */
615 2, /* size (0 = byte, 1 = short, 2 = long) */
617 TRUE, /* pc_relative */
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 */
625 0xffffffff, /* dst_mask */
626 TRUE), /* pcrel_offset */
628 /* 32-bit relocation to the symbol's procedure linkage table. */
629 HOWTO (R_PPC64_PLT32, /* type */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
633 FALSE, /* pc_relative */
635 complain_overflow_bitfield, /* complain_on_overflow */
636 ppc64_elf_unhandled_reloc, /* special_function */
637 "R_PPC64_PLT32", /* name */
638 FALSE, /* partial_inplace */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
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 */
647 2, /* size (0 = byte, 1 = short, 2 = long) */
649 TRUE, /* pc_relative */
651 complain_overflow_signed, /* complain_on_overflow */
652 bfd_elf_generic_reloc, /* special_function */
653 "R_PPC64_PLTREL32", /* name */
654 FALSE, /* partial_inplace */
656 0xffffffff, /* dst_mask */
657 TRUE), /* pcrel_offset */
659 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
661 HOWTO (R_PPC64_PLT16_LO, /* type */
663 1, /* size (0 = byte, 1 = short, 2 = long) */
665 FALSE, /* pc_relative */
667 complain_overflow_dont, /* complain_on_overflow */
668 ppc64_elf_unhandled_reloc, /* special_function */
669 "R_PPC64_PLT16_LO", /* name */
670 FALSE, /* partial_inplace */
672 0xffff, /* dst_mask */
673 FALSE), /* pcrel_offset */
675 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
677 HOWTO (R_PPC64_PLT16_HI, /* type */
679 1, /* size (0 = byte, 1 = short, 2 = long) */
681 FALSE, /* pc_relative */
683 complain_overflow_dont, /* complain_on_overflow */
684 ppc64_elf_unhandled_reloc, /* special_function */
685 "R_PPC64_PLT16_HI", /* name */
686 FALSE, /* partial_inplace */
688 0xffff, /* dst_mask */
689 FALSE), /* pcrel_offset */
691 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
693 HOWTO (R_PPC64_PLT16_HA, /* type */
695 1, /* size (0 = byte, 1 = short, 2 = long) */
697 FALSE, /* pc_relative */
699 complain_overflow_dont, /* complain_on_overflow */
700 ppc64_elf_unhandled_reloc, /* special_function */
701 "R_PPC64_PLT16_HA", /* name */
702 FALSE, /* partial_inplace */
704 0xffff, /* dst_mask */
705 FALSE), /* pcrel_offset */
707 /* 16-bit section relative relocation. */
708 HOWTO (R_PPC64_SECTOFF, /* type */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
712 FALSE, /* pc_relative */
714 complain_overflow_bitfield, /* complain_on_overflow */
715 ppc64_elf_sectoff_reloc, /* special_function */
716 "R_PPC64_SECTOFF", /* name */
717 FALSE, /* partial_inplace */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
722 /* Like R_PPC64_SECTOFF, but no overflow warning. */
723 HOWTO (R_PPC64_SECTOFF_LO, /* type */
725 1, /* size (0 = byte, 1 = short, 2 = long) */
727 FALSE, /* pc_relative */
729 complain_overflow_dont, /* complain_on_overflow */
730 ppc64_elf_sectoff_reloc, /* special_function */
731 "R_PPC64_SECTOFF_LO", /* name */
732 FALSE, /* partial_inplace */
734 0xffff, /* dst_mask */
735 FALSE), /* pcrel_offset */
737 /* 16-bit upper half section relative relocation. */
738 HOWTO (R_PPC64_SECTOFF_HI, /* type */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
742 FALSE, /* pc_relative */
744 complain_overflow_dont, /* complain_on_overflow */
745 ppc64_elf_sectoff_reloc, /* special_function */
746 "R_PPC64_SECTOFF_HI", /* name */
747 FALSE, /* partial_inplace */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
752 /* 16-bit upper half adjusted section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF_HA, /* type */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
757 FALSE, /* pc_relative */
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 */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
767 /* Like R_PPC64_REL24 without touching the two least significant bits. */
768 HOWTO (R_PPC64_REL30, /* type */
770 2, /* size (0 = byte, 1 = short, 2 = long) */
772 TRUE, /* pc_relative */
774 complain_overflow_dont, /* complain_on_overflow */
775 bfd_elf_generic_reloc, /* special_function */
776 "R_PPC64_REL30", /* name */
777 FALSE, /* partial_inplace */
779 0xfffffffc, /* dst_mask */
780 TRUE), /* pcrel_offset */
782 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
784 /* A standard 64-bit relocation. */
785 HOWTO (R_PPC64_ADDR64, /* type */
787 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
789 FALSE, /* pc_relative */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC64_ADDR64", /* name */
794 FALSE, /* partial_inplace */
796 ONES (64), /* dst_mask */
797 FALSE), /* pcrel_offset */
799 /* The bits 32-47 of an address. */
800 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
802 1, /* size (0 = byte, 1 = short, 2 = long) */
804 FALSE, /* pc_relative */
806 complain_overflow_dont, /* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_PPC64_ADDR16_HIGHER", /* name */
809 FALSE, /* partial_inplace */
811 0xffff, /* dst_mask */
812 FALSE), /* pcrel_offset */
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 */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
820 FALSE, /* pc_relative */
822 complain_overflow_dont, /* complain_on_overflow */
823 ppc64_elf_ha_reloc, /* special_function */
824 "R_PPC64_ADDR16_HIGHERA", /* name */
825 FALSE, /* partial_inplace */
827 0xffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
830 /* The bits 48-63 of an address. */
831 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
835 FALSE, /* pc_relative */
837 complain_overflow_dont, /* complain_on_overflow */
838 bfd_elf_generic_reloc, /* special_function */
839 "R_PPC64_ADDR16_HIGHEST", /* name */
840 FALSE, /* partial_inplace */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
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 */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
851 FALSE, /* pc_relative */
853 complain_overflow_dont, /* complain_on_overflow */
854 ppc64_elf_ha_reloc, /* special_function */
855 "R_PPC64_ADDR16_HIGHESTA", /* name */
856 FALSE, /* partial_inplace */
858 0xffff, /* dst_mask */
859 FALSE), /* pcrel_offset */
861 /* Like ADDR64, but may be unaligned. */
862 HOWTO (R_PPC64_UADDR64, /* type */
864 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
866 FALSE, /* pc_relative */
868 complain_overflow_dont, /* complain_on_overflow */
869 bfd_elf_generic_reloc, /* special_function */
870 "R_PPC64_UADDR64", /* name */
871 FALSE, /* partial_inplace */
873 ONES (64), /* dst_mask */
874 FALSE), /* pcrel_offset */
876 /* 64-bit relative relocation. */
877 HOWTO (R_PPC64_REL64, /* type */
879 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
881 TRUE, /* pc_relative */
883 complain_overflow_dont, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC64_REL64", /* name */
886 FALSE, /* partial_inplace */
888 ONES (64), /* dst_mask */
889 TRUE), /* pcrel_offset */
891 /* 64-bit relocation to the symbol's procedure linkage table. */
892 HOWTO (R_PPC64_PLT64, /* type */
894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
896 FALSE, /* pc_relative */
898 complain_overflow_dont, /* complain_on_overflow */
899 ppc64_elf_unhandled_reloc, /* special_function */
900 "R_PPC64_PLT64", /* name */
901 FALSE, /* partial_inplace */
903 ONES (64), /* dst_mask */
904 FALSE), /* pcrel_offset */
906 /* 64-bit PC relative relocation to the symbol's procedure linkage
908 /* FIXME: R_PPC64_PLTREL64 not supported. */
909 HOWTO (R_PPC64_PLTREL64, /* type */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
913 TRUE, /* pc_relative */
915 complain_overflow_dont, /* complain_on_overflow */
916 ppc64_elf_unhandled_reloc, /* special_function */
917 "R_PPC64_PLTREL64", /* name */
918 FALSE, /* partial_inplace */
920 ONES (64), /* dst_mask */
921 TRUE), /* pcrel_offset */
923 /* 16 bit TOC-relative relocation. */
925 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
926 HOWTO (R_PPC64_TOC16, /* type */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
930 FALSE, /* pc_relative */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc64_elf_toc_reloc, /* special_function */
934 "R_PPC64_TOC16", /* name */
935 FALSE, /* partial_inplace */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
940 /* 16 bit TOC-relative relocation without overflow. */
942 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
943 HOWTO (R_PPC64_TOC16_LO, /* type */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
947 FALSE, /* pc_relative */
949 complain_overflow_dont, /* complain_on_overflow */
950 ppc64_elf_toc_reloc, /* special_function */
951 "R_PPC64_TOC16_LO", /* name */
952 FALSE, /* partial_inplace */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
957 /* 16 bit TOC-relative relocation, high 16 bits. */
959 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
960 HOWTO (R_PPC64_TOC16_HI, /* type */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
964 FALSE, /* pc_relative */
966 complain_overflow_dont, /* complain_on_overflow */
967 ppc64_elf_toc_reloc, /* special_function */
968 "R_PPC64_TOC16_HI", /* name */
969 FALSE, /* partial_inplace */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
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
978 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
979 HOWTO (R_PPC64_TOC16_HA, /* type */
981 1, /* size (0 = byte, 1 = short, 2 = long) */
983 FALSE, /* pc_relative */
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 */
990 0xffff, /* dst_mask */
991 FALSE), /* pcrel_offset */
993 /* 64-bit relocation; insert value of TOC base (.TOC.). */
995 /* R_PPC64_TOC 51 doubleword64 .TOC. */
996 HOWTO (R_PPC64_TOC, /* type */
998 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1000 FALSE, /* pc_relative */
1002 complain_overflow_bitfield, /* complain_on_overflow */
1003 ppc64_elf_toc64_reloc, /* special_function */
1004 "R_PPC64_TOC", /* name */
1005 FALSE, /* partial_inplace */
1007 ONES (64), /* dst_mask */
1008 FALSE), /* pcrel_offset */
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 */
1021 1, /* size (0 = byte, 1 = short, 2 = long) */
1023 FALSE, /* pc_relative */
1025 complain_overflow_signed, /* complain_on_overflow */
1026 ppc64_elf_unhandled_reloc, /* special_function */
1027 "R_PPC64_PLTGOT16", /* name */
1028 FALSE, /* partial_inplace */
1030 0xffff, /* dst_mask */
1031 FALSE), /* pcrel_offset */
1033 /* Like R_PPC64_PLTGOT16, but without overflow. */
1034 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1035 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1039 FALSE, /* pc_relative */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 ppc64_elf_unhandled_reloc, /* special_function */
1043 "R_PPC64_PLTGOT16_LO", /* name */
1044 FALSE, /* partial_inplace */
1046 0xffff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
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) */
1055 FALSE, /* pc_relative */
1057 complain_overflow_dont, /* complain_on_overflow */
1058 ppc64_elf_unhandled_reloc, /* special_function */
1059 "R_PPC64_PLTGOT16_HI", /* name */
1060 FALSE, /* partial_inplace */
1062 0xffff, /* dst_mask */
1063 FALSE), /* pcrel_offset */
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,
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) */
1073 FALSE, /* pc_relative */
1075 complain_overflow_dont,/* complain_on_overflow */
1076 ppc64_elf_unhandled_reloc, /* special_function */
1077 "R_PPC64_PLTGOT16_HA", /* name */
1078 FALSE, /* partial_inplace */
1080 0xffff, /* dst_mask */
1081 FALSE), /* pcrel_offset */
1083 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1084 HOWTO (R_PPC64_ADDR16_DS, /* type */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1088 FALSE, /* pc_relative */
1090 complain_overflow_bitfield, /* complain_on_overflow */
1091 bfd_elf_generic_reloc, /* special_function */
1092 "R_PPC64_ADDR16_DS", /* name */
1093 FALSE, /* partial_inplace */
1095 0xfffc, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1098 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1099 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1103 FALSE, /* pc_relative */
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 */
1110 0xfffc, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1113 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_GOT16_DS, /* type */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1118 FALSE, /* pc_relative */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc64_elf_unhandled_reloc, /* special_function */
1122 "R_PPC64_GOT16_DS", /* name */
1123 FALSE, /* partial_inplace */
1125 0xfffc, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1128 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1133 FALSE, /* pc_relative */
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 */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1143 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1148 FALSE, /* pc_relative */
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 */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1158 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1163 FALSE, /* pc_relative */
1165 complain_overflow_bitfield, /* complain_on_overflow */
1166 ppc64_elf_sectoff_reloc, /* special_function */
1167 "R_PPC64_SECTOFF_DS", /* name */
1168 FALSE, /* partial_inplace */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1173 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 FALSE, /* pc_relative */
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 */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1188 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_TOC16_DS, /* type */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 FALSE, /* pc_relative */
1195 complain_overflow_signed, /* complain_on_overflow */
1196 ppc64_elf_toc_reloc, /* special_function */
1197 "R_PPC64_TOC16_DS", /* name */
1198 FALSE, /* partial_inplace */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1203 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1208 FALSE, /* pc_relative */
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 */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
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 */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 FALSE, /* pc_relative */
1226 complain_overflow_signed, /* complain_on_overflow */
1227 ppc64_elf_unhandled_reloc, /* special_function */
1228 "R_PPC64_PLTGOT16_DS", /* name */
1229 FALSE, /* partial_inplace */
1231 0xfffc, /* dst_mask */
1232 FALSE), /* pcrel_offset */
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 */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1240 FALSE, /* pc_relative */
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 */
1247 0xfffc, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1250 /* Marker relocs for TLS. */
1253 2, /* size (0 = byte, 1 = short, 2 = long) */
1255 FALSE, /* pc_relative */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 bfd_elf_generic_reloc, /* special_function */
1259 "R_PPC64_TLS", /* name */
1260 FALSE, /* partial_inplace */
1263 FALSE), /* pcrel_offset */
1265 HOWTO (R_PPC64_TLSGD,
1267 2, /* size (0 = byte, 1 = short, 2 = long) */
1269 FALSE, /* pc_relative */
1271 complain_overflow_dont, /* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC64_TLSGD", /* name */
1274 FALSE, /* partial_inplace */
1277 FALSE), /* pcrel_offset */
1279 HOWTO (R_PPC64_TLSLD,
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1283 FALSE, /* pc_relative */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC64_TLSLD", /* name */
1288 FALSE, /* partial_inplace */
1291 FALSE), /* pcrel_offset */
1293 HOWTO (R_PPC64_TOCSAVE,
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 FALSE, /* pc_relative */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TOCSAVE", /* name */
1302 FALSE, /* partial_inplace */
1305 FALSE), /* pcrel_offset */
1307 /* Computes the load module index of the load module that contains the
1308 definition of its TLS sym. */
1309 HOWTO (R_PPC64_DTPMOD64,
1311 4, /* size (0 = byte, 1 = short, 2 = long) */
1313 FALSE, /* pc_relative */
1315 complain_overflow_dont, /* complain_on_overflow */
1316 ppc64_elf_unhandled_reloc, /* special_function */
1317 "R_PPC64_DTPMOD64", /* name */
1318 FALSE, /* partial_inplace */
1320 ONES (64), /* dst_mask */
1321 FALSE), /* pcrel_offset */
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,
1328 4, /* size (0 = byte, 1 = short, 2 = long) */
1330 FALSE, /* pc_relative */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPREL64", /* name */
1335 FALSE, /* partial_inplace */
1337 ONES (64), /* dst_mask */
1338 FALSE), /* pcrel_offset */
1340 /* A 16 bit dtprel reloc. */
1341 HOWTO (R_PPC64_DTPREL16,
1343 1, /* size (0 = byte, 1 = short, 2 = long) */
1345 FALSE, /* pc_relative */
1347 complain_overflow_signed, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL16", /* name */
1350 FALSE, /* partial_inplace */
1352 0xffff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1355 /* Like DTPREL16, but no overflow. */
1356 HOWTO (R_PPC64_DTPREL16_LO,
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1360 FALSE, /* pc_relative */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16_LO", /* name */
1365 FALSE, /* partial_inplace */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
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) */
1375 FALSE, /* pc_relative */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_HI", /* name */
1380 FALSE, /* partial_inplace */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
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) */
1390 FALSE, /* pc_relative */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HA", /* name */
1395 FALSE, /* partial_inplace */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
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) */
1405 FALSE, /* pc_relative */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_HIGHER", /* name */
1410 FALSE, /* partial_inplace */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
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) */
1420 FALSE, /* pc_relative */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HIGHERA", /* name */
1425 FALSE, /* partial_inplace */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
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) */
1435 FALSE, /* pc_relative */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HIGHEST", /* name */
1440 FALSE, /* partial_inplace */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
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) */
1450 FALSE, /* pc_relative */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1455 FALSE, /* partial_inplace */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1460 /* Like DTPREL16, but for insns with a DS field. */
1461 HOWTO (R_PPC64_DTPREL16_DS,
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1465 FALSE, /* pc_relative */
1467 complain_overflow_signed, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_DS", /* name */
1470 FALSE, /* partial_inplace */
1472 0xfffc, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1475 /* Like DTPREL16_DS, but no overflow. */
1476 HOWTO (R_PPC64_DTPREL16_LO_DS,
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1480 FALSE, /* pc_relative */
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 */
1487 0xfffc, /* dst_mask */
1488 FALSE), /* pcrel_offset */
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,
1494 4, /* size (0 = byte, 1 = short, 2 = long) */
1496 FALSE, /* pc_relative */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc64_elf_unhandled_reloc, /* special_function */
1500 "R_PPC64_TPREL64", /* name */
1501 FALSE, /* partial_inplace */
1503 ONES (64), /* dst_mask */
1504 FALSE), /* pcrel_offset */
1506 /* A 16 bit tprel reloc. */
1507 HOWTO (R_PPC64_TPREL16,
1509 1, /* size (0 = byte, 1 = short, 2 = long) */
1511 FALSE, /* pc_relative */
1513 complain_overflow_signed, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL16", /* name */
1516 FALSE, /* partial_inplace */
1518 0xffff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1521 /* Like TPREL16, but no overflow. */
1522 HOWTO (R_PPC64_TPREL16_LO,
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1526 FALSE, /* pc_relative */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16_LO", /* name */
1531 FALSE, /* partial_inplace */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
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) */
1541 FALSE, /* pc_relative */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_HI", /* name */
1546 FALSE, /* partial_inplace */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
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) */
1556 FALSE, /* pc_relative */
1558 complain_overflow_dont, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HA", /* name */
1561 FALSE, /* partial_inplace */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
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) */
1571 FALSE, /* pc_relative */
1573 complain_overflow_dont, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_HIGHER", /* name */
1576 FALSE, /* partial_inplace */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
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) */
1586 FALSE, /* pc_relative */
1588 complain_overflow_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HIGHERA", /* name */
1591 FALSE, /* partial_inplace */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
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) */
1601 FALSE, /* pc_relative */
1603 complain_overflow_dont, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HIGHEST", /* name */
1606 FALSE, /* partial_inplace */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
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) */
1616 FALSE, /* pc_relative */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHESTA", /* name */
1621 FALSE, /* partial_inplace */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1626 /* Like TPREL16, but for insns with a DS field. */
1627 HOWTO (R_PPC64_TPREL16_DS,
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1631 FALSE, /* pc_relative */
1633 complain_overflow_signed, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_DS", /* name */
1636 FALSE, /* partial_inplace */
1638 0xfffc, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1641 /* Like TPREL16_DS, but no overflow. */
1642 HOWTO (R_PPC64_TPREL16_LO_DS,
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1646 FALSE, /* pc_relative */
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 */
1653 0xfffc, /* dst_mask */
1654 FALSE), /* pcrel_offset */
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,
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1663 FALSE, /* pc_relative */
1665 complain_overflow_signed, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_GOT_TLSGD16", /* name */
1668 FALSE, /* partial_inplace */
1670 0xffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1673 /* Like GOT_TLSGD16, but no overflow. */
1674 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1678 FALSE, /* pc_relative */
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 */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
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) */
1693 FALSE, /* pc_relative */
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 */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
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) */
1708 FALSE, /* pc_relative */
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 */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
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,
1723 1, /* size (0 = byte, 1 = short, 2 = long) */
1725 FALSE, /* pc_relative */
1727 complain_overflow_signed, /* complain_on_overflow */
1728 ppc64_elf_unhandled_reloc, /* special_function */
1729 "R_PPC64_GOT_TLSLD16", /* name */
1730 FALSE, /* partial_inplace */
1732 0xffff, /* dst_mask */
1733 FALSE), /* pcrel_offset */
1735 /* Like GOT_TLSLD16, but no overflow. */
1736 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1738 1, /* size (0 = byte, 1 = short, 2 = long) */
1740 FALSE, /* pc_relative */
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 */
1747 0xffff, /* dst_mask */
1748 FALSE), /* pcrel_offset */
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) */
1755 FALSE, /* pc_relative */
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 */
1762 0xffff, /* dst_mask */
1763 FALSE), /* pcrel_offset */
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) */
1770 FALSE, /* pc_relative */
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 */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
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,
1784 1, /* size (0 = byte, 1 = short, 2 = long) */
1786 FALSE, /* pc_relative */
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 */
1793 0xfffc, /* dst_mask */
1794 FALSE), /* pcrel_offset */
1796 /* Like GOT_DTPREL16_DS, but no overflow. */
1797 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1799 1, /* size (0 = byte, 1 = short, 2 = long) */
1801 FALSE, /* pc_relative */
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 */
1808 0xfffc, /* dst_mask */
1809 FALSE), /* pcrel_offset */
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) */
1816 FALSE, /* pc_relative */
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 */
1823 0xffff, /* dst_mask */
1824 FALSE), /* pcrel_offset */
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) */
1831 FALSE, /* pc_relative */
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 */
1838 0xffff, /* dst_mask */
1839 FALSE), /* pcrel_offset */
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,
1845 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 FALSE, /* pc_relative */
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 */
1854 0xfffc, /* dst_mask */
1855 FALSE), /* pcrel_offset */
1857 /* Like GOT_TPREL16_DS, but no overflow. */
1858 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1860 1, /* size (0 = byte, 1 = short, 2 = long) */
1862 FALSE, /* pc_relative */
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 */
1869 0xfffc, /* dst_mask */
1870 FALSE), /* pcrel_offset */
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) */
1877 FALSE, /* pc_relative */
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 */
1884 0xffff, /* dst_mask */
1885 FALSE), /* pcrel_offset */
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) */
1892 FALSE, /* pc_relative */
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 */
1899 0xffff, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1902 HOWTO (R_PPC64_JMP_IREL, /* type */
1904 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1906 FALSE, /* pc_relative */
1908 complain_overflow_dont, /* complain_on_overflow */
1909 ppc64_elf_unhandled_reloc, /* special_function */
1910 "R_PPC64_JMP_IREL", /* name */
1911 FALSE, /* partial_inplace */
1914 FALSE), /* pcrel_offset */
1916 HOWTO (R_PPC64_IRELATIVE, /* type */
1918 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1920 FALSE, /* pc_relative */
1922 complain_overflow_dont, /* complain_on_overflow */
1923 bfd_elf_generic_reloc, /* special_function */
1924 "R_PPC64_IRELATIVE", /* name */
1925 FALSE, /* partial_inplace */
1927 ONES (64), /* dst_mask */
1928 FALSE), /* pcrel_offset */
1930 /* A 16 bit relative relocation. */
1931 HOWTO (R_PPC64_REL16, /* type */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1935 TRUE, /* pc_relative */
1937 complain_overflow_bitfield, /* complain_on_overflow */
1938 bfd_elf_generic_reloc, /* special_function */
1939 "R_PPC64_REL16", /* name */
1940 FALSE, /* partial_inplace */
1942 0xffff, /* dst_mask */
1943 TRUE), /* pcrel_offset */
1945 /* A 16 bit relative relocation without overflow. */
1946 HOWTO (R_PPC64_REL16_LO, /* type */
1948 1, /* size (0 = byte, 1 = short, 2 = long) */
1950 TRUE, /* pc_relative */
1952 complain_overflow_dont,/* complain_on_overflow */
1953 bfd_elf_generic_reloc, /* special_function */
1954 "R_PPC64_REL16_LO", /* name */
1955 FALSE, /* partial_inplace */
1957 0xffff, /* dst_mask */
1958 TRUE), /* pcrel_offset */
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) */
1965 TRUE, /* pc_relative */
1967 complain_overflow_dont, /* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_REL16_HI", /* name */
1970 FALSE, /* partial_inplace */
1972 0xffff, /* dst_mask */
1973 TRUE), /* pcrel_offset */
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) */
1981 TRUE, /* pc_relative */
1983 complain_overflow_dont, /* complain_on_overflow */
1984 ppc64_elf_ha_reloc, /* special_function */
1985 "R_PPC64_REL16_HA", /* name */
1986 FALSE, /* partial_inplace */
1988 0xffff, /* dst_mask */
1989 TRUE), /* pcrel_offset */
1991 /* GNU extension to record C++ vtable hierarchy. */
1992 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1994 0, /* size (0 = byte, 1 = short, 2 = long) */
1996 FALSE, /* pc_relative */
1998 complain_overflow_dont, /* complain_on_overflow */
1999 NULL, /* special_function */
2000 "R_PPC64_GNU_VTINHERIT", /* name */
2001 FALSE, /* partial_inplace */
2004 FALSE), /* pcrel_offset */
2006 /* GNU extension to record C++ vtable member usage. */
2007 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2009 0, /* size (0 = byte, 1 = short, 2 = long) */
2011 FALSE, /* pc_relative */
2013 complain_overflow_dont, /* complain_on_overflow */
2014 NULL, /* special_function */
2015 "R_PPC64_GNU_VTENTRY", /* name */
2016 FALSE, /* partial_inplace */
2019 FALSE), /* pcrel_offset */
2023 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2027 ppc_howto_init (void)
2029 unsigned int i, type;
2032 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
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];
2042 static reloc_howto_type *
2043 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2044 bfd_reloc_code_real_type code)
2046 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2048 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2049 /* Initialize howto table if needed. */
2057 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2059 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2061 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2063 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2065 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2067 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2069 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2071 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2073 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2075 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2077 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2079 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2081 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2083 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2085 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2087 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2089 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2091 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2093 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2095 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2097 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2099 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2101 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2103 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2105 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2107 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2109 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2111 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2113 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2115 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2117 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2119 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2121 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2123 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2125 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2127 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2129 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2131 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2133 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2135 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2137 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2139 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2141 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2143 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2145 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2147 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2149 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2151 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2153 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2155 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2157 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2159 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2161 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2163 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2165 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2167 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2169 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2171 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2173 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2175 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2177 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2179 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2181 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2183 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2185 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2187 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2189 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2191 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2193 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2195 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2197 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2199 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2201 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2203 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2205 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2207 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2209 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2211 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2213 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2215 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2217 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2219 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2221 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2223 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2225 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2227 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2229 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2231 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2233 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2235 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2237 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2239 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2241 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2243 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2245 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2247 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2249 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2251 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2253 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2255 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2257 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2259 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2261 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2263 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2265 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2267 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2269 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2273 return ppc64_elf_howto_table[r];
2276 static reloc_howto_type *
2277 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2283 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
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];
2292 /* Set the howto pointer for a PowerPC ELF reloc. */
2295 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2296 Elf_Internal_Rela *dst)
2300 /* Initialize howto table if needed. */
2301 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2304 type = ELF64_R_TYPE (dst->r_info);
2305 if (type >= (sizeof (ppc64_elf_howto_table)
2306 / sizeof (ppc64_elf_howto_table[0])))
2308 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2310 type = R_PPC64_NONE;
2312 cache_ptr->howto = ppc64_elf_howto_table[type];
2315 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2317 static bfd_reloc_status_type
2318 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2319 void *data, asection *input_section,
2320 bfd *output_bfd, char **error_message)
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
2325 if (output_bfd != NULL)
2326 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2327 input_section, output_bfd, error_message);
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
2332 reloc_entry->addend += 0x8000;
2333 return bfd_reloc_continue;
2336 static bfd_reloc_status_type
2337 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2338 void *data, asection *input_section,
2339 bfd *output_bfd, char **error_message)
2341 if (output_bfd != NULL)
2342 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2343 input_section, output_bfd, error_message);
2345 if (strcmp (symbol->section->name, ".opd") == 0
2346 && (symbol->section->owner->flags & DYNAMIC) == 0)
2348 bfd_vma dest = opd_entry_value (symbol->section,
2349 symbol->value + reloc_entry->addend,
2351 if (dest != (bfd_vma) -1)
2352 reloc_entry->addend = dest - (symbol->value
2353 + symbol->section->output_section->vma
2354 + symbol->section->output_offset);
2356 return bfd_reloc_continue;
2359 static bfd_reloc_status_type
2360 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2361 void *data, asection *input_section,
2362 bfd *output_bfd, char **error_message)
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;
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
2373 if (output_bfd != NULL)
2374 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2375 input_section, output_bfd, error_message);
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. */
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))
2392 else if ((insn & (0x14 << 21)) == (0x10 << 21))
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;
2408 from = (reloc_entry->address
2409 + input_section->output_offset
2410 + input_section->output_section->vma);
2412 /* Invert 'y' bit if not the default. */
2413 if ((bfd_signed_vma) (target - from) < 0)
2416 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2418 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2419 input_section, output_bfd, error_message);
2422 static bfd_reloc_status_type
2423 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2424 void *data, asection *input_section,
2425 bfd *output_bfd, char **error_message)
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
2430 if (output_bfd != NULL)
2431 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2432 input_section, output_bfd, error_message);
2434 /* Subtract the symbol section base address. */
2435 reloc_entry->addend -= symbol->section->output_section->vma;
2436 return bfd_reloc_continue;
2439 static bfd_reloc_status_type
2440 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2441 void *data, asection *input_section,
2442 bfd *output_bfd, char **error_message)
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
2447 if (output_bfd != NULL)
2448 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2449 input_section, output_bfd, error_message);
2451 /* Subtract the symbol section base address. */
2452 reloc_entry->addend -= symbol->section->output_section->vma;
2454 /* Adjust the addend for sign extension of the low 16 bits. */
2455 reloc_entry->addend += 0x8000;
2456 return bfd_reloc_continue;
2459 static bfd_reloc_status_type
2460 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2461 void *data, asection *input_section,
2462 bfd *output_bfd, char **error_message)
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
2469 if (output_bfd != NULL)
2470 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2471 input_section, output_bfd, error_message);
2473 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2475 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2477 /* Subtract the TOC base address. */
2478 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2479 return bfd_reloc_continue;
2482 static bfd_reloc_status_type
2483 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2484 void *data, asection *input_section,
2485 bfd *output_bfd, char **error_message)
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
2492 if (output_bfd != NULL)
2493 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2494 input_section, output_bfd, error_message);
2496 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2498 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2500 /* Subtract the TOC base address. */
2501 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2503 /* Adjust the addend for sign extension of the low 16 bits. */
2504 reloc_entry->addend += 0x8000;
2505 return bfd_reloc_continue;
2508 static bfd_reloc_status_type
2509 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2510 void *data, asection *input_section,
2511 bfd *output_bfd, char **error_message)
2514 bfd_size_type octets;
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
2519 if (output_bfd != NULL)
2520 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2521 input_section, output_bfd, error_message);
2523 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2525 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
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;
2532 static bfd_reloc_status_type
2533 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2534 void *data, asection *input_section,
2535 bfd *output_bfd, char **error_message)
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
2540 if (output_bfd != NULL)
2541 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2542 input_section, output_bfd, error_message);
2544 if (error_message != NULL)
2546 static char buf[60];
2547 sprintf (buf, "generic linker can't handle %s",
2548 reloc_entry->howto->name);
2549 *error_message = buf;
2551 return bfd_reloc_dangerous;
2554 /* Track GOT entries needed for a given symbol. We might need more
2555 than one got entry per symbol. */
2558 struct got_entry *next;
2560 /* The symbol addend that we'll be placing in the GOT. */
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.
2569 Point to the BFD owning this GOT entry. */
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;
2576 /* Non-zero if got.ent points to real entry. */
2577 unsigned char is_indirect;
2579 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2582 bfd_signed_vma refcount;
2584 struct got_entry *ent;
2588 /* The same for PLT. */
2591 struct plt_entry *next;
2597 bfd_signed_vma refcount;
2602 struct ppc64_elf_obj_tdata
2604 struct elf_obj_tdata elf;
2606 /* Shortcuts to dynamic linker sections. */
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;
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;
2619 /* A copy of relocs before they are modified for --emit-relocs. */
2620 Elf_Internal_Rela *relocs;
2622 /* Section contents. */
2626 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2627 the reloc to be in the range -32768 to 32767. */
2628 unsigned int has_small_toc_reloc : 1;
2630 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2631 instruction not one we handle. */
2632 unsigned int unexpected_toc_insn : 1;
2635 #define ppc64_elf_tdata(bfd) \
2636 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2638 #define ppc64_tlsld_got(bfd) \
2639 (&ppc64_elf_tdata (bfd)->tlsld_got)
2641 #define is_ppc64_elf(bfd) \
2642 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2643 && elf_object_id (bfd) == PPC64_ELF_DATA)
2645 /* Override the generic function because we store some extras. */
2648 ppc64_elf_mkobject (bfd *abfd)
2650 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2654 /* Fix bad default arch selected for a 64 bit input bfd when the
2655 default is 32 bit. */
2658 ppc64_elf_object_p (bfd *abfd)
2660 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2662 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2664 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2666 /* Relies on arch after 32 bit default being 64 bit default. */
2667 abfd->arch_info = abfd->arch_info->next;
2668 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2674 /* Support for core dump NOTE sections. */
2677 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2679 size_t offset, size;
2681 if (note->descsz != 504)
2685 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2688 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2694 /* Make a ".reg/999" section. */
2695 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2696 size, note->descpos + offset);
2700 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2702 if (note->descsz != 136)
2705 elf_tdata (abfd)->core->pid
2706 = bfd_get_32 (abfd, note->descdata + 24);
2707 elf_tdata (abfd)->core->program
2708 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2709 elf_tdata (abfd)->core->command
2710 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2716 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2729 va_start (ap, note_type);
2730 memset (data, 0, sizeof (data));
2731 strncpy (data + 40, va_arg (ap, const char *), 16);
2732 strncpy (data + 56, va_arg (ap, const char *), 80);
2734 return elfcore_write_note (abfd, buf, bufsiz,
2735 "CORE", note_type, data, sizeof (data));
2746 va_start (ap, note_type);
2747 memset (data, 0, 112);
2748 pid = va_arg (ap, long);
2749 bfd_put_32 (abfd, pid, data + 32);
2750 cursig = va_arg (ap, int);
2751 bfd_put_16 (abfd, cursig, data + 12);
2752 greg = va_arg (ap, const void *);
2753 memcpy (data + 112, greg, 384);
2754 memset (data + 496, 0, 8);
2756 return elfcore_write_note (abfd, buf, bufsiz,
2757 "CORE", note_type, data, sizeof (data));
2762 /* Add extra PPC sections. */
2764 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2766 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2767 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2768 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2769 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2770 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2771 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2772 { NULL, 0, 0, 0, 0 }
2775 enum _ppc64_sec_type {
2781 struct _ppc64_elf_section_data
2783 struct bfd_elf_section_data elf;
2787 /* An array with one entry for each opd function descriptor. */
2788 struct _opd_sec_data
2790 /* Points to the function code section for local opd entries. */
2791 asection **func_sec;
2793 /* After editing .opd, adjust references to opd local syms. */
2797 /* An array for toc sections, indexed by offset/8. */
2798 struct _toc_sec_data
2800 /* Specifies the relocation symbol index used at a given toc offset. */
2803 /* And the relocation addend. */
2808 enum _ppc64_sec_type sec_type:2;
2810 /* Flag set when small branches are detected. Used to
2811 select suitable defaults for the stub group size. */
2812 unsigned int has_14bit_branch:1;
2815 #define ppc64_elf_section_data(sec) \
2816 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2819 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2821 if (!sec->used_by_bfd)
2823 struct _ppc64_elf_section_data *sdata;
2824 bfd_size_type amt = sizeof (*sdata);
2826 sdata = bfd_zalloc (abfd, amt);
2829 sec->used_by_bfd = sdata;
2832 return _bfd_elf_new_section_hook (abfd, sec);
2835 static struct _opd_sec_data *
2836 get_opd_info (asection * sec)
2839 && ppc64_elf_section_data (sec) != NULL
2840 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2841 return &ppc64_elf_section_data (sec)->u.opd;
2845 /* Parameters for the qsort hook. */
2846 static bfd_boolean synthetic_relocatable;
2848 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2851 compare_symbols (const void *ap, const void *bp)
2853 const asymbol *a = * (const asymbol **) ap;
2854 const asymbol *b = * (const asymbol **) bp;
2856 /* Section symbols first. */
2857 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2859 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2862 /* then .opd symbols. */
2863 if (strcmp (a->section->name, ".opd") == 0
2864 && strcmp (b->section->name, ".opd") != 0)
2866 if (strcmp (a->section->name, ".opd") != 0
2867 && strcmp (b->section->name, ".opd") == 0)
2870 /* then other code symbols. */
2871 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2872 == (SEC_CODE | SEC_ALLOC)
2873 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2874 != (SEC_CODE | SEC_ALLOC))
2877 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2878 != (SEC_CODE | SEC_ALLOC)
2879 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2880 == (SEC_CODE | SEC_ALLOC))
2883 if (synthetic_relocatable)
2885 if (a->section->id < b->section->id)
2888 if (a->section->id > b->section->id)
2892 if (a->value + a->section->vma < b->value + b->section->vma)
2895 if (a->value + a->section->vma > b->value + b->section->vma)
2898 /* For syms with the same value, prefer strong dynamic global function
2899 syms over other syms. */
2900 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2903 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2906 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2909 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2912 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2915 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2918 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2921 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2927 /* Search SYMS for a symbol of the given VALUE. */
2930 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2938 mid = (lo + hi) >> 1;
2939 if (syms[mid]->value + syms[mid]->section->vma < value)
2941 else if (syms[mid]->value + syms[mid]->section->vma > value)
2951 mid = (lo + hi) >> 1;
2952 if (syms[mid]->section->id < id)
2954 else if (syms[mid]->section->id > id)
2956 else if (syms[mid]->value < value)
2958 else if (syms[mid]->value > value)
2968 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2970 bfd_vma vma = *(bfd_vma *) ptr;
2971 return ((section->flags & SEC_ALLOC) != 0
2972 && section->vma <= vma
2973 && vma < section->vma + section->size);
2976 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2977 entry syms. Also generate @plt symbols for the glink branch table. */
2980 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2981 long static_count, asymbol **static_syms,
2982 long dyn_count, asymbol **dyn_syms,
2989 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2991 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2996 opd = bfd_get_section_by_name (abfd, ".opd");
3000 symcount = static_count;
3002 symcount += dyn_count;
3006 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3010 if (!relocatable && static_count != 0 && dyn_count != 0)
3012 /* Use both symbol tables. */
3013 memcpy (syms, static_syms, static_count * sizeof (*syms));
3014 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3016 else if (!relocatable && static_count == 0)
3017 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3019 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3021 synthetic_relocatable = relocatable;
3022 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3024 if (!relocatable && symcount > 1)
3027 /* Trim duplicate syms, since we may have merged the normal and
3028 dynamic symbols. Actually, we only care about syms that have
3029 different values, so trim any with the same value. */
3030 for (i = 1, j = 1; i < symcount; ++i)
3031 if (syms[i - 1]->value + syms[i - 1]->section->vma
3032 != syms[i]->value + syms[i]->section->vma)
3033 syms[j++] = syms[i];
3038 if (strcmp (syms[i]->section->name, ".opd") == 0)
3042 for (; i < symcount; ++i)
3043 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3044 != (SEC_CODE | SEC_ALLOC))
3045 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3049 for (; i < symcount; ++i)
3050 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3054 for (; i < symcount; ++i)
3055 if (strcmp (syms[i]->section->name, ".opd") != 0)
3059 for (; i < symcount; ++i)
3060 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3061 != (SEC_CODE | SEC_ALLOC))
3069 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3074 if (opdsymend == secsymend)
3077 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3078 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3082 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3089 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3093 while (r < opd->relocation + relcount
3094 && r->address < syms[i]->value + opd->vma)
3097 if (r == opd->relocation + relcount)
3100 if (r->address != syms[i]->value + opd->vma)
3103 if (r->howto->type != R_PPC64_ADDR64)
3106 sym = *r->sym_ptr_ptr;
3107 if (!sym_exists_at (syms, opdsymend, symcount,
3108 sym->section->id, sym->value + r->addend))
3111 size += sizeof (asymbol);
3112 size += strlen (syms[i]->name) + 2;
3116 s = *ret = bfd_malloc (size);
3123 names = (char *) (s + count);
3125 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3129 while (r < opd->relocation + relcount
3130 && r->address < syms[i]->value + opd->vma)
3133 if (r == opd->relocation + relcount)
3136 if (r->address != syms[i]->value + opd->vma)
3139 if (r->howto->type != R_PPC64_ADDR64)
3142 sym = *r->sym_ptr_ptr;
3143 if (!sym_exists_at (syms, opdsymend, symcount,
3144 sym->section->id, sym->value + r->addend))
3149 s->flags |= BSF_SYNTHETIC;
3150 s->section = sym->section;
3151 s->value = sym->value + r->addend;
3154 len = strlen (syms[i]->name);
3155 memcpy (names, syms[i]->name, len + 1);
3157 /* Have udata.p point back to the original symbol this
3158 synthetic symbol was derived from. */
3159 s->udata.p = syms[i];
3166 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3170 bfd_vma glink_vma = 0, resolv_vma = 0;
3171 asection *dynamic, *glink = NULL, *relplt = NULL;
3174 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3178 free_contents_and_exit:
3186 for (i = secsymend; i < opdsymend; ++i)
3190 /* Ignore bogus symbols. */
3191 if (syms[i]->value > opd->size - 8)
3194 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3195 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3198 size += sizeof (asymbol);
3199 size += strlen (syms[i]->name) + 2;
3203 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3205 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3207 bfd_byte *dynbuf, *extdyn, *extdynend;
3209 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3211 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3212 goto free_contents_and_exit;
3214 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3215 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3218 extdynend = extdyn + dynamic->size;
3219 for (; extdyn < extdynend; extdyn += extdynsize)
3221 Elf_Internal_Dyn dyn;
3222 (*swap_dyn_in) (abfd, extdyn, &dyn);
3224 if (dyn.d_tag == DT_NULL)
3227 if (dyn.d_tag == DT_PPC64_GLINK)
3229 /* The first glink stub starts at offset 32; see comment in
3230 ppc64_elf_finish_dynamic_sections. */
3231 glink_vma = dyn.d_un.d_val + 32;
3232 /* The .glink section usually does not survive the final
3233 link; search for the section (usually .text) where the
3234 glink stubs now reside. */
3235 glink = bfd_sections_find_if (abfd, section_covers_vma,
3246 /* Determine __glink trampoline by reading the relative branch
3247 from the first glink stub. */
3249 if (bfd_get_section_contents (abfd, glink, buf,
3250 glink_vma + 4 - glink->vma, 4))
3252 unsigned int insn = bfd_get_32 (abfd, buf);
3254 if ((insn & ~0x3fffffc) == 0)
3255 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3259 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3261 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3264 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3265 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3266 goto free_contents_and_exit;
3268 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3269 size += plt_count * sizeof (asymbol);
3271 p = relplt->relocation;
3272 for (i = 0; i < plt_count; i++, p++)
3274 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3276 size += sizeof ("+0x") - 1 + 16;
3281 s = *ret = bfd_malloc (size);
3283 goto free_contents_and_exit;
3285 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3287 for (i = secsymend; i < opdsymend; ++i)
3291 if (syms[i]->value > opd->size - 8)
3294 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3295 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3299 asection *sec = abfd->sections;
3306 long mid = (lo + hi) >> 1;
3307 if (syms[mid]->section->vma < ent)
3309 else if (syms[mid]->section->vma > ent)
3313 sec = syms[mid]->section;
3318 if (lo >= hi && lo > codesecsym)
3319 sec = syms[lo - 1]->section;
3321 for (; sec != NULL; sec = sec->next)
3325 /* SEC_LOAD may not be set if SEC is from a separate debug
3327 if ((sec->flags & SEC_ALLOC) == 0)
3329 if ((sec->flags & SEC_CODE) != 0)
3332 s->flags |= BSF_SYNTHETIC;
3333 s->value = ent - s->section->vma;
3336 len = strlen (syms[i]->name);
3337 memcpy (names, syms[i]->name, len + 1);
3339 /* Have udata.p point back to the original symbol this
3340 synthetic symbol was derived from. */
3341 s->udata.p = syms[i];
3347 if (glink != NULL && relplt != NULL)
3351 /* Add a symbol for the main glink trampoline. */
3352 memset (s, 0, sizeof *s);
3354 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3356 s->value = resolv_vma - glink->vma;
3358 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3359 names += sizeof ("__glink_PLTresolve");
3364 /* FIXME: It would be very much nicer to put sym@plt on the
3365 stub rather than on the glink branch table entry. The
3366 objdump disassembler would then use a sensible symbol
3367 name on plt calls. The difficulty in doing so is
3368 a) finding the stubs, and,
3369 b) matching stubs against plt entries, and,
3370 c) there can be multiple stubs for a given plt entry.
3372 Solving (a) could be done by code scanning, but older
3373 ppc64 binaries used different stubs to current code.
3374 (b) is the tricky one since you need to known the toc
3375 pointer for at least one function that uses a pic stub to
3376 be able to calculate the plt address referenced.
3377 (c) means gdb would need to set multiple breakpoints (or
3378 find the glink branch itself) when setting breakpoints
3379 for pending shared library loads. */
3380 p = relplt->relocation;
3381 for (i = 0; i < plt_count; i++, p++)
3385 *s = **p->sym_ptr_ptr;
3386 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3387 we are defining a symbol, ensure one of them is set. */
3388 if ((s->flags & BSF_LOCAL) == 0)
3389 s->flags |= BSF_GLOBAL;
3390 s->flags |= BSF_SYNTHETIC;
3392 s->value = glink_vma - glink->vma;
3395 len = strlen ((*p->sym_ptr_ptr)->name);
3396 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3400 memcpy (names, "+0x", sizeof ("+0x") - 1);
3401 names += sizeof ("+0x") - 1;
3402 bfd_sprintf_vma (abfd, names, p->addend);
3403 names += strlen (names);
3405 memcpy (names, "@plt", sizeof ("@plt"));
3406 names += sizeof ("@plt");
3421 /* The following functions are specific to the ELF linker, while
3422 functions above are used generally. Those named ppc64_elf_* are
3423 called by the main ELF linker code. They appear in this file more
3424 or less in the order in which they are called. eg.
3425 ppc64_elf_check_relocs is called early in the link process,
3426 ppc64_elf_finish_dynamic_sections is one of the last functions
3429 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3430 functions have both a function code symbol and a function descriptor
3431 symbol. A call to foo in a relocatable object file looks like:
3438 The function definition in another object file might be:
3442 . .quad .TOC.@tocbase
3448 When the linker resolves the call during a static link, the branch
3449 unsurprisingly just goes to .foo and the .opd information is unused.
3450 If the function definition is in a shared library, things are a little
3451 different: The call goes via a plt call stub, the opd information gets
3452 copied to the plt, and the linker patches the nop.
3460 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3461 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3462 . std 2,40(1) # this is the general idea
3470 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3472 The "reloc ()" notation is supposed to indicate that the linker emits
3473 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3476 What are the difficulties here? Well, firstly, the relocations
3477 examined by the linker in check_relocs are against the function code
3478 sym .foo, while the dynamic relocation in the plt is emitted against
3479 the function descriptor symbol, foo. Somewhere along the line, we need
3480 to carefully copy dynamic link information from one symbol to the other.
3481 Secondly, the generic part of the elf linker will make .foo a dynamic
3482 symbol as is normal for most other backends. We need foo dynamic
3483 instead, at least for an application final link. However, when
3484 creating a shared library containing foo, we need to have both symbols
3485 dynamic so that references to .foo are satisfied during the early
3486 stages of linking. Otherwise the linker might decide to pull in a
3487 definition from some other object, eg. a static library.
3489 Update: As of August 2004, we support a new convention. Function
3490 calls may use the function descriptor symbol, ie. "bl foo". This
3491 behaves exactly as "bl .foo". */
3493 /* Of those relocs that might be copied as dynamic relocs, this function
3494 selects those that must be copied when linking a shared library,
3495 even when the symbol is local. */
3498 must_be_dyn_reloc (struct bfd_link_info *info,
3499 enum elf_ppc64_reloc_type r_type)
3511 case R_PPC64_TPREL16:
3512 case R_PPC64_TPREL16_LO:
3513 case R_PPC64_TPREL16_HI:
3514 case R_PPC64_TPREL16_HA:
3515 case R_PPC64_TPREL16_DS:
3516 case R_PPC64_TPREL16_LO_DS:
3517 case R_PPC64_TPREL16_HIGHER:
3518 case R_PPC64_TPREL16_HIGHERA:
3519 case R_PPC64_TPREL16_HIGHEST:
3520 case R_PPC64_TPREL16_HIGHESTA:
3521 case R_PPC64_TPREL64:
3522 return !info->executable;
3526 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3527 copying dynamic variables from a shared lib into an app's dynbss
3528 section, and instead use a dynamic relocation to point into the
3529 shared lib. With code that gcc generates, it's vital that this be
3530 enabled; In the PowerPC64 ABI, the address of a function is actually
3531 the address of a function descriptor, which resides in the .opd
3532 section. gcc uses the descriptor directly rather than going via the
3533 GOT as some other ABI's do, which means that initialized function
3534 pointers must reference the descriptor. Thus, a function pointer
3535 initialized to the address of a function in a shared library will
3536 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3537 redefines the function descriptor symbol to point to the copy. This
3538 presents a problem as a plt entry for that function is also
3539 initialized from the function descriptor symbol and the copy reloc
3540 may not be initialized first. */
3541 #define ELIMINATE_COPY_RELOCS 1
3543 /* Section name for stubs is the associated section name plus this
3545 #define STUB_SUFFIX ".stub"
3548 ppc_stub_long_branch:
3549 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3550 destination, but a 24 bit branch in a stub section will reach.
3553 ppc_stub_plt_branch:
3554 Similar to the above, but a 24 bit branch in the stub section won't
3555 reach its destination.
3556 . addis %r12,%r2,xxx@toc@ha
3557 . ld %r11,xxx@toc@l(%r12)
3562 Used to call a function in a shared library. If it so happens that
3563 the plt entry referenced crosses a 64k boundary, then an extra
3564 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3565 . addis %r12,%r2,xxx@toc@ha
3567 . ld %r11,xxx+0@toc@l(%r12)
3569 . ld %r2,xxx+8@toc@l(%r12)
3570 . ld %r11,xxx+16@toc@l(%r12)
3573 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3574 code to adjust the value and save r2 to support multiple toc sections.
3575 A ppc_stub_long_branch with an r2 offset looks like:
3577 . addis %r2,%r2,off@ha
3578 . addi %r2,%r2,off@l
3581 A ppc_stub_plt_branch with an r2 offset looks like:
3583 . addis %r12,%r2,xxx@toc@ha
3584 . ld %r11,xxx@toc@l(%r12)
3585 . addis %r2,%r2,off@ha
3586 . addi %r2,%r2,off@l
3590 In cases where the "addis" instruction would add zero, the "addis" is
3591 omitted and following instructions modified slightly in some cases.
3594 enum ppc_stub_type {
3596 ppc_stub_long_branch,
3597 ppc_stub_long_branch_r2off,
3598 ppc_stub_plt_branch,
3599 ppc_stub_plt_branch_r2off,
3601 ppc_stub_plt_call_r2save
3604 struct ppc_stub_hash_entry {
3606 /* Base hash table entry structure. */
3607 struct bfd_hash_entry root;
3609 enum ppc_stub_type stub_type;
3611 /* The stub section. */
3614 /* Offset within stub_sec of the beginning of this stub. */
3615 bfd_vma stub_offset;
3617 /* Given the symbol's value and its section we can determine its final
3618 value when building the stubs (so the stub knows where to jump. */
3619 bfd_vma target_value;
3620 asection *target_section;
3622 /* The symbol table entry, if any, that this was derived from. */
3623 struct ppc_link_hash_entry *h;
3624 struct plt_entry *plt_ent;
3626 /* Where this stub is being called from, or, in the case of combined
3627 stub sections, the first input section in the group. */
3631 struct ppc_branch_hash_entry {
3633 /* Base hash table entry structure. */
3634 struct bfd_hash_entry root;
3636 /* Offset within branch lookup table. */
3637 unsigned int offset;
3639 /* Generation marker. */
3643 /* Used to track dynamic relocations for local symbols. */
3644 struct ppc_dyn_relocs
3646 struct ppc_dyn_relocs *next;
3648 /* The input section of the reloc. */
3651 /* Total number of relocs copied for the input section. */
3652 unsigned int count : 31;
3654 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3655 unsigned int ifunc : 1;
3658 struct ppc_link_hash_entry
3660 struct elf_link_hash_entry elf;
3663 /* A pointer to the most recently used stub hash entry against this
3665 struct ppc_stub_hash_entry *stub_cache;
3667 /* A pointer to the next symbol starting with a '.' */
3668 struct ppc_link_hash_entry *next_dot_sym;
3671 /* Track dynamic relocs copied for this symbol. */
3672 struct elf_dyn_relocs *dyn_relocs;
3674 /* Link between function code and descriptor symbols. */
3675 struct ppc_link_hash_entry *oh;
3677 /* Flag function code and descriptor symbols. */
3678 unsigned int is_func:1;
3679 unsigned int is_func_descriptor:1;
3680 unsigned int fake:1;
3682 /* Whether global opd/toc sym has been adjusted or not.
3683 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3684 should be set for all globals defined in any opd/toc section. */
3685 unsigned int adjust_done:1;
3687 /* Set if we twiddled this symbol to weak at some stage. */
3688 unsigned int was_undefined:1;
3690 /* Contexts in which symbol is used in the GOT (or TOC).
3691 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3692 corresponding relocs are encountered during check_relocs.
3693 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3694 indicate the corresponding GOT entry type is not needed.
3695 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3696 a TPREL one. We use a separate flag rather than setting TPREL
3697 just for convenience in distinguishing the two cases. */
3698 #define TLS_GD 1 /* GD reloc. */
3699 #define TLS_LD 2 /* LD reloc. */
3700 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3701 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3702 #define TLS_TLS 16 /* Any TLS reloc. */
3703 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3704 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3705 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3706 unsigned char tls_mask;
3709 /* ppc64 ELF linker hash table. */
3711 struct ppc_link_hash_table
3713 struct elf_link_hash_table elf;
3715 /* The stub hash table. */
3716 struct bfd_hash_table stub_hash_table;
3718 /* Another hash table for plt_branch stubs. */
3719 struct bfd_hash_table branch_hash_table;
3721 /* Hash table for function prologue tocsave. */
3722 htab_t tocsave_htab;
3724 /* Linker stub bfd. */
3727 /* Linker call-backs. */
3728 asection * (*add_stub_section) (const char *, asection *);
3729 void (*layout_sections_again) (void);
3731 /* Array to keep track of which stub sections have been created, and
3732 information on stub grouping. */
3734 /* This is the section to which stubs in the group will be attached. */
3736 /* The stub section. */
3738 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3742 /* Temp used when calculating TOC pointers. */
3745 asection *toc_first_sec;
3747 /* Highest input section id. */
3750 /* Highest output section index. */
3753 /* Used when adding symbols. */
3754 struct ppc_link_hash_entry *dot_syms;
3756 /* List of input sections for each output section. */
3757 asection **input_list;
3759 /* Short-cuts to get to dynamic linker sections. */
3771 asection *glink_eh_frame;
3773 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3774 struct ppc_link_hash_entry *tls_get_addr;
3775 struct ppc_link_hash_entry *tls_get_addr_fd;
3777 /* The size of reliplt used by got entry relocs. */
3778 bfd_size_type got_reli_size;
3781 unsigned long stub_count[ppc_stub_plt_call_r2save];
3783 /* Number of stubs against global syms. */
3784 unsigned long stub_globals;
3786 /* Alignment of PLT call stubs. */
3787 unsigned int plt_stub_align:4;
3789 /* Set if PLT call stubs should load r11. */
3790 unsigned int plt_static_chain:1;
3792 /* Set if PLT call stubs need a read-read barrier. */
3793 unsigned int plt_thread_safe:1;
3795 /* Set if we should emit symbols for stubs. */
3796 unsigned int emit_stub_syms:1;
3798 /* Set if __tls_get_addr optimization should not be done. */
3799 unsigned int no_tls_get_addr_opt:1;
3801 /* Support for multiple toc sections. */
3802 unsigned int do_multi_toc:1;
3803 unsigned int multi_toc_needed:1;
3804 unsigned int second_toc_pass:1;
3805 unsigned int do_toc_opt:1;
3808 unsigned int stub_error:1;
3810 /* Temp used by ppc64_elf_process_dot_syms. */
3811 unsigned int twiddled_syms:1;
3813 /* Incremented every time we size stubs. */
3814 unsigned int stub_iteration;
3816 /* Small local sym cache. */
3817 struct sym_cache sym_cache;
3820 /* Rename some of the generic section flags to better document how they
3823 /* Nonzero if this section has TLS related relocations. */
3824 #define has_tls_reloc sec_flg0
3826 /* Nonzero if this section has a call to __tls_get_addr. */
3827 #define has_tls_get_addr_call sec_flg1
3829 /* Nonzero if this section has any toc or got relocs. */
3830 #define has_toc_reloc sec_flg2
3832 /* Nonzero if this section has a call to another section that uses
3834 #define makes_toc_func_call sec_flg3
3836 /* Recursion protection when determining above flag. */
3837 #define call_check_in_progress sec_flg4
3838 #define call_check_done sec_flg5
3840 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3842 #define ppc_hash_table(p) \
3843 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3844 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3846 #define ppc_stub_hash_lookup(table, string, create, copy) \
3847 ((struct ppc_stub_hash_entry *) \
3848 bfd_hash_lookup ((table), (string), (create), (copy)))
3850 #define ppc_branch_hash_lookup(table, string, create, copy) \
3851 ((struct ppc_branch_hash_entry *) \
3852 bfd_hash_lookup ((table), (string), (create), (copy)))
3854 /* Create an entry in the stub hash table. */
3856 static struct bfd_hash_entry *
3857 stub_hash_newfunc (struct bfd_hash_entry *entry,
3858 struct bfd_hash_table *table,
3861 /* Allocate the structure if it has not already been allocated by a
3865 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3870 /* Call the allocation method of the superclass. */
3871 entry = bfd_hash_newfunc (entry, table, string);
3874 struct ppc_stub_hash_entry *eh;
3876 /* Initialize the local fields. */
3877 eh = (struct ppc_stub_hash_entry *) entry;
3878 eh->stub_type = ppc_stub_none;
3879 eh->stub_sec = NULL;
3880 eh->stub_offset = 0;
3881 eh->target_value = 0;
3882 eh->target_section = NULL;
3890 /* Create an entry in the branch hash table. */
3892 static struct bfd_hash_entry *
3893 branch_hash_newfunc (struct bfd_hash_entry *entry,
3894 struct bfd_hash_table *table,
3897 /* Allocate the structure if it has not already been allocated by a
3901 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3906 /* Call the allocation method of the superclass. */
3907 entry = bfd_hash_newfunc (entry, table, string);
3910 struct ppc_branch_hash_entry *eh;
3912 /* Initialize the local fields. */
3913 eh = (struct ppc_branch_hash_entry *) entry;
3921 /* Create an entry in a ppc64 ELF linker hash table. */
3923 static struct bfd_hash_entry *
3924 link_hash_newfunc (struct bfd_hash_entry *entry,
3925 struct bfd_hash_table *table,
3928 /* Allocate the structure if it has not already been allocated by a
3932 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3937 /* Call the allocation method of the superclass. */
3938 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3941 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3943 memset (&eh->u.stub_cache, 0,
3944 (sizeof (struct ppc_link_hash_entry)
3945 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3947 /* When making function calls, old ABI code references function entry
3948 points (dot symbols), while new ABI code references the function
3949 descriptor symbol. We need to make any combination of reference and
3950 definition work together, without breaking archive linking.
3952 For a defined function "foo" and an undefined call to "bar":
3953 An old object defines "foo" and ".foo", references ".bar" (possibly
3955 A new object defines "foo" and references "bar".
3957 A new object thus has no problem with its undefined symbols being
3958 satisfied by definitions in an old object. On the other hand, the
3959 old object won't have ".bar" satisfied by a new object.
3961 Keep a list of newly added dot-symbols. */
3963 if (string[0] == '.')
3965 struct ppc_link_hash_table *htab;
3967 htab = (struct ppc_link_hash_table *) table;
3968 eh->u.next_dot_sym = htab->dot_syms;
3969 htab->dot_syms = eh;
3976 struct tocsave_entry {
3982 tocsave_htab_hash (const void *p)
3984 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3985 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
3989 tocsave_htab_eq (const void *p1, const void *p2)
3991 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3992 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3993 return e1->sec == e2->sec && e1->offset == e2->offset;
3996 /* Create a ppc64 ELF linker hash table. */
3998 static struct bfd_link_hash_table *
3999 ppc64_elf_link_hash_table_create (bfd *abfd)
4001 struct ppc_link_hash_table *htab;
4002 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4004 htab = bfd_zmalloc (amt);
4008 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4009 sizeof (struct ppc_link_hash_entry),
4016 /* Init the stub hash table too. */
4017 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4018 sizeof (struct ppc_stub_hash_entry)))
4021 /* And the branch hash table. */
4022 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4023 sizeof (struct ppc_branch_hash_entry)))
4026 htab->tocsave_htab = htab_try_create (1024,
4030 if (htab->tocsave_htab == NULL)
4033 /* Initializing two fields of the union is just cosmetic. We really
4034 only care about glist, but when compiled on a 32-bit host the
4035 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4036 debugger inspection of these fields look nicer. */
4037 htab->elf.init_got_refcount.refcount = 0;
4038 htab->elf.init_got_refcount.glist = NULL;
4039 htab->elf.init_plt_refcount.refcount = 0;
4040 htab->elf.init_plt_refcount.glist = NULL;
4041 htab->elf.init_got_offset.offset = 0;
4042 htab->elf.init_got_offset.glist = NULL;
4043 htab->elf.init_plt_offset.offset = 0;
4044 htab->elf.init_plt_offset.glist = NULL;
4046 return &htab->elf.root;
4049 /* Free the derived linker hash table. */
4052 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4054 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4056 bfd_hash_table_free (&htab->stub_hash_table);
4057 bfd_hash_table_free (&htab->branch_hash_table);
4058 if (htab->tocsave_htab)
4059 htab_delete (htab->tocsave_htab);
4060 _bfd_elf_link_hash_table_free (hash);
4063 /* Create sections for linker generated code. */
4066 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4068 struct ppc_link_hash_table *htab;
4071 htab = ppc_hash_table (info);
4073 /* Create .sfpr for code to save and restore fp regs. */
4074 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4075 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4076 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4078 if (htab->sfpr == NULL
4079 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4082 /* Create .glink for lazy dynamic linking support. */
4083 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4085 if (htab->glink == NULL
4086 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4089 if (!info->no_ld_generated_unwind_info)
4091 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4092 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4093 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4096 if (htab->glink_eh_frame == NULL
4097 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4101 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4102 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4103 if (htab->iplt == NULL
4104 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4107 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4108 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4109 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4112 if (htab->reliplt == NULL
4113 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4116 /* Create branch lookup table for plt_branch stubs. */
4117 flags = (SEC_ALLOC | SEC_LOAD
4118 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4119 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4121 if (htab->brlt == NULL
4122 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4128 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4129 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4130 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4133 if (htab->relbrlt == NULL
4134 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4140 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4143 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4145 struct ppc_link_hash_table *htab;
4147 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4149 /* Always hook our dynamic sections into the first bfd, which is the
4150 linker created stub bfd. This ensures that the GOT header is at
4151 the start of the output TOC section. */
4152 htab = ppc_hash_table (info);
4155 htab->stub_bfd = abfd;
4156 htab->elf.dynobj = abfd;
4158 if (info->relocatable)
4161 return create_linkage_sections (htab->elf.dynobj, info);
4164 /* Build a name for an entry in the stub hash table. */
4167 ppc_stub_name (const asection *input_section,
4168 const asection *sym_sec,
4169 const struct ppc_link_hash_entry *h,
4170 const Elf_Internal_Rela *rel)
4175 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4176 offsets from a sym as a branch target? In fact, we could
4177 probably assume the addend is always zero. */
4178 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4182 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4183 stub_name = bfd_malloc (len);
4184 if (stub_name == NULL)
4187 len = sprintf (stub_name, "%08x.%s+%x",
4188 input_section->id & 0xffffffff,
4189 h->elf.root.root.string,
4190 (int) rel->r_addend & 0xffffffff);
4194 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4195 stub_name = bfd_malloc (len);
4196 if (stub_name == NULL)
4199 len = sprintf (stub_name, "%08x.%x:%x+%x",
4200 input_section->id & 0xffffffff,
4201 sym_sec->id & 0xffffffff,
4202 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4203 (int) rel->r_addend & 0xffffffff);
4205 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4206 stub_name[len - 2] = 0;
4210 /* Look up an entry in the stub hash. Stub entries are cached because
4211 creating the stub name takes a bit of time. */
4213 static struct ppc_stub_hash_entry *
4214 ppc_get_stub_entry (const asection *input_section,
4215 const asection *sym_sec,
4216 struct ppc_link_hash_entry *h,
4217 const Elf_Internal_Rela *rel,
4218 struct ppc_link_hash_table *htab)
4220 struct ppc_stub_hash_entry *stub_entry;
4221 const asection *id_sec;
4223 /* If this input section is part of a group of sections sharing one
4224 stub section, then use the id of the first section in the group.
4225 Stub names need to include a section id, as there may well be
4226 more than one stub used to reach say, printf, and we need to
4227 distinguish between them. */
4228 id_sec = htab->stub_group[input_section->id].link_sec;
4230 if (h != NULL && h->u.stub_cache != NULL
4231 && h->u.stub_cache->h == h
4232 && h->u.stub_cache->id_sec == id_sec)
4234 stub_entry = h->u.stub_cache;
4240 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4241 if (stub_name == NULL)
4244 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4245 stub_name, FALSE, FALSE);
4247 h->u.stub_cache = stub_entry;
4255 /* Add a new stub entry to the stub hash. Not all fields of the new
4256 stub entry are initialised. */
4258 static struct ppc_stub_hash_entry *
4259 ppc_add_stub (const char *stub_name,
4261 struct bfd_link_info *info)
4263 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4266 struct ppc_stub_hash_entry *stub_entry;
4268 link_sec = htab->stub_group[section->id].link_sec;
4269 stub_sec = htab->stub_group[section->id].stub_sec;
4270 if (stub_sec == NULL)
4272 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4273 if (stub_sec == NULL)
4279 namelen = strlen (link_sec->name);
4280 len = namelen + sizeof (STUB_SUFFIX);
4281 s_name = bfd_alloc (htab->stub_bfd, len);
4285 memcpy (s_name, link_sec->name, namelen);
4286 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4287 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4288 if (stub_sec == NULL)
4290 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4292 htab->stub_group[section->id].stub_sec = stub_sec;
4295 /* Enter this entry into the linker stub hash table. */
4296 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4298 if (stub_entry == NULL)
4300 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4301 section->owner, stub_name);
4305 stub_entry->stub_sec = stub_sec;
4306 stub_entry->stub_offset = 0;
4307 stub_entry->id_sec = link_sec;
4311 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4312 not already done. */
4315 create_got_section (bfd *abfd, struct bfd_link_info *info)
4317 asection *got, *relgot;
4319 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4321 if (!is_ppc64_elf (abfd))
4328 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4331 htab->got = bfd_get_linker_section (htab->elf.dynobj, ".got");
4336 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4337 | SEC_LINKER_CREATED);
4339 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4341 || !bfd_set_section_alignment (abfd, got, 3))
4344 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4345 flags | SEC_READONLY);
4347 || ! bfd_set_section_alignment (abfd, relgot, 3))
4350 ppc64_elf_tdata (abfd)->got = got;
4351 ppc64_elf_tdata (abfd)->relgot = relgot;
4355 /* Create the dynamic sections, and set up shortcuts. */
4358 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4360 struct ppc_link_hash_table *htab;
4362 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4365 htab = ppc_hash_table (info);
4370 htab->got = bfd_get_linker_section (dynobj, ".got");
4371 htab->plt = bfd_get_linker_section (dynobj, ".plt");
4372 htab->relplt = bfd_get_linker_section (dynobj, ".rela.plt");
4373 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4375 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4377 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4378 || (!info->shared && !htab->relbss))
4384 /* Follow indirect and warning symbol links. */
4386 static inline struct bfd_link_hash_entry *
4387 follow_link (struct bfd_link_hash_entry *h)
4389 while (h->type == bfd_link_hash_indirect
4390 || h->type == bfd_link_hash_warning)
4395 static inline struct elf_link_hash_entry *
4396 elf_follow_link (struct elf_link_hash_entry *h)
4398 return (struct elf_link_hash_entry *) follow_link (&h->root);
4401 static inline struct ppc_link_hash_entry *
4402 ppc_follow_link (struct ppc_link_hash_entry *h)
4404 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4407 /* Merge PLT info on FROM with that on TO. */
4410 move_plt_plist (struct ppc_link_hash_entry *from,
4411 struct ppc_link_hash_entry *to)
4413 if (from->elf.plt.plist != NULL)
4415 if (to->elf.plt.plist != NULL)
4417 struct plt_entry **entp;
4418 struct plt_entry *ent;
4420 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4422 struct plt_entry *dent;
4424 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4425 if (dent->addend == ent->addend)
4427 dent->plt.refcount += ent->plt.refcount;
4434 *entp = to->elf.plt.plist;
4437 to->elf.plt.plist = from->elf.plt.plist;
4438 from->elf.plt.plist = NULL;
4442 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4445 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4446 struct elf_link_hash_entry *dir,
4447 struct elf_link_hash_entry *ind)
4449 struct ppc_link_hash_entry *edir, *eind;
4451 edir = (struct ppc_link_hash_entry *) dir;
4452 eind = (struct ppc_link_hash_entry *) ind;
4454 edir->is_func |= eind->is_func;
4455 edir->is_func_descriptor |= eind->is_func_descriptor;
4456 edir->tls_mask |= eind->tls_mask;
4457 if (eind->oh != NULL)
4458 edir->oh = ppc_follow_link (eind->oh);
4460 /* If called to transfer flags for a weakdef during processing
4461 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4462 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4463 if (!(ELIMINATE_COPY_RELOCS
4464 && eind->elf.root.type != bfd_link_hash_indirect
4465 && edir->elf.dynamic_adjusted))
4466 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4468 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4469 edir->elf.ref_regular |= eind->elf.ref_regular;
4470 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4471 edir->elf.needs_plt |= eind->elf.needs_plt;
4473 /* Copy over any dynamic relocs we may have on the indirect sym. */
4474 if (eind->dyn_relocs != NULL)
4476 if (edir->dyn_relocs != NULL)
4478 struct elf_dyn_relocs **pp;
4479 struct elf_dyn_relocs *p;
4481 /* Add reloc counts against the indirect sym to the direct sym
4482 list. Merge any entries against the same section. */
4483 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4485 struct elf_dyn_relocs *q;
4487 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4488 if (q->sec == p->sec)
4490 q->pc_count += p->pc_count;
4491 q->count += p->count;
4498 *pp = edir->dyn_relocs;
4501 edir->dyn_relocs = eind->dyn_relocs;
4502 eind->dyn_relocs = NULL;
4505 /* If we were called to copy over info for a weak sym, that's all.
4506 You might think dyn_relocs need not be copied over; After all,
4507 both syms will be dynamic or both non-dynamic so we're just
4508 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4509 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4510 dyn_relocs in read-only sections, and it does so on what is the
4512 if (eind->elf.root.type != bfd_link_hash_indirect)
4515 /* Copy over got entries that we may have already seen to the
4516 symbol which just became indirect. */
4517 if (eind->elf.got.glist != NULL)
4519 if (edir->elf.got.glist != NULL)
4521 struct got_entry **entp;
4522 struct got_entry *ent;
4524 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4526 struct got_entry *dent;
4528 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4529 if (dent->addend == ent->addend
4530 && dent->owner == ent->owner
4531 && dent->tls_type == ent->tls_type)
4533 dent->got.refcount += ent->got.refcount;
4540 *entp = edir->elf.got.glist;
4543 edir->elf.got.glist = eind->elf.got.glist;
4544 eind->elf.got.glist = NULL;
4547 /* And plt entries. */
4548 move_plt_plist (eind, edir);
4550 if (eind->elf.dynindx != -1)
4552 if (edir->elf.dynindx != -1)
4553 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4554 edir->elf.dynstr_index);
4555 edir->elf.dynindx = eind->elf.dynindx;
4556 edir->elf.dynstr_index = eind->elf.dynstr_index;
4557 eind->elf.dynindx = -1;
4558 eind->elf.dynstr_index = 0;
4562 /* Find the function descriptor hash entry from the given function code
4563 hash entry FH. Link the entries via their OH fields. */
4565 static struct ppc_link_hash_entry *
4566 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4568 struct ppc_link_hash_entry *fdh = fh->oh;
4572 const char *fd_name = fh->elf.root.root.string + 1;
4574 fdh = (struct ppc_link_hash_entry *)
4575 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4579 fdh->is_func_descriptor = 1;
4585 return ppc_follow_link (fdh);
4588 /* Make a fake function descriptor sym for the code sym FH. */
4590 static struct ppc_link_hash_entry *
4591 make_fdh (struct bfd_link_info *info,
4592 struct ppc_link_hash_entry *fh)
4596 struct bfd_link_hash_entry *bh;
4597 struct ppc_link_hash_entry *fdh;
4599 abfd = fh->elf.root.u.undef.abfd;
4600 newsym = bfd_make_empty_symbol (abfd);
4601 newsym->name = fh->elf.root.root.string + 1;
4602 newsym->section = bfd_und_section_ptr;
4604 newsym->flags = BSF_WEAK;
4607 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4608 newsym->flags, newsym->section,
4609 newsym->value, NULL, FALSE, FALSE,
4613 fdh = (struct ppc_link_hash_entry *) bh;
4614 fdh->elf.non_elf = 0;
4616 fdh->is_func_descriptor = 1;
4623 /* Fix function descriptor symbols defined in .opd sections to be
4627 ppc64_elf_add_symbol_hook (bfd *ibfd,
4628 struct bfd_link_info *info,
4629 Elf_Internal_Sym *isym,
4630 const char **name ATTRIBUTE_UNUSED,
4631 flagword *flags ATTRIBUTE_UNUSED,
4633 bfd_vma *value ATTRIBUTE_UNUSED)
4635 if ((ibfd->flags & DYNAMIC) == 0
4636 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4637 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4639 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4641 if ((ibfd->flags & DYNAMIC) == 0)
4642 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4644 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4646 else if (*sec != NULL
4647 && strcmp ((*sec)->name, ".opd") == 0)
4648 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4653 /* This function makes an old ABI object reference to ".bar" cause the
4654 inclusion of a new ABI object archive that defines "bar".
4655 NAME is a symbol defined in an archive. Return a symbol in the hash
4656 table that might be satisfied by the archive symbols. */
4658 static struct elf_link_hash_entry *
4659 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4660 struct bfd_link_info *info,
4663 struct elf_link_hash_entry *h;
4667 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4669 /* Don't return this sym if it is a fake function descriptor
4670 created by add_symbol_adjust. */
4671 && !(h->root.type == bfd_link_hash_undefweak
4672 && ((struct ppc_link_hash_entry *) h)->fake))
4678 len = strlen (name);
4679 dot_name = bfd_alloc (abfd, len + 2);
4680 if (dot_name == NULL)
4681 return (struct elf_link_hash_entry *) 0 - 1;
4683 memcpy (dot_name + 1, name, len + 1);
4684 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4685 bfd_release (abfd, dot_name);
4689 /* This function satisfies all old ABI object references to ".bar" if a
4690 new ABI object defines "bar". Well, at least, undefined dot symbols
4691 are made weak. This stops later archive searches from including an
4692 object if we already have a function descriptor definition. It also
4693 prevents the linker complaining about undefined symbols.
4694 We also check and correct mismatched symbol visibility here. The
4695 most restrictive visibility of the function descriptor and the
4696 function entry symbol is used. */
4699 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4701 struct ppc_link_hash_table *htab;
4702 struct ppc_link_hash_entry *fdh;
4704 if (eh->elf.root.type == bfd_link_hash_indirect)
4707 if (eh->elf.root.type == bfd_link_hash_warning)
4708 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4710 if (eh->elf.root.root.string[0] != '.')
4713 htab = ppc_hash_table (info);
4717 fdh = lookup_fdh (eh, htab);
4720 if (!info->relocatable
4721 && (eh->elf.root.type == bfd_link_hash_undefined
4722 || eh->elf.root.type == bfd_link_hash_undefweak)
4723 && eh->elf.ref_regular)
4725 /* Make an undefweak function descriptor sym, which is enough to
4726 pull in an --as-needed shared lib, but won't cause link
4727 errors. Archives are handled elsewhere. */
4728 fdh = make_fdh (info, eh);
4731 fdh->elf.ref_regular = 1;
4736 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4737 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4738 if (entry_vis < descr_vis)
4739 fdh->elf.other += entry_vis - descr_vis;
4740 else if (entry_vis > descr_vis)
4741 eh->elf.other += descr_vis - entry_vis;
4743 if ((fdh->elf.root.type == bfd_link_hash_defined
4744 || fdh->elf.root.type == bfd_link_hash_defweak)
4745 && eh->elf.root.type == bfd_link_hash_undefined)
4747 eh->elf.root.type = bfd_link_hash_undefweak;
4748 eh->was_undefined = 1;
4749 htab->twiddled_syms = 1;
4756 /* Process list of dot-symbols we made in link_hash_newfunc. */
4759 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4761 struct ppc_link_hash_table *htab;
4762 struct ppc_link_hash_entry **p, *eh;
4764 if (!is_ppc64_elf (info->output_bfd))
4766 htab = ppc_hash_table (info);
4770 if (is_ppc64_elf (ibfd))
4772 p = &htab->dot_syms;
4773 while ((eh = *p) != NULL)
4776 if (&eh->elf == htab->elf.hgot)
4778 else if (htab->elf.hgot == NULL
4779 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
4780 htab->elf.hgot = &eh->elf;
4781 else if (!add_symbol_adjust (eh, info))
4783 p = &eh->u.next_dot_sym;
4787 /* Clear the list for non-ppc64 input files. */
4788 p = &htab->dot_syms;
4789 while ((eh = *p) != NULL)
4792 p = &eh->u.next_dot_sym;
4795 /* We need to fix the undefs list for any syms we have twiddled to
4797 if (htab->twiddled_syms)
4799 bfd_link_repair_undef_list (&htab->elf.root);
4800 htab->twiddled_syms = 0;
4805 /* Undo hash table changes when an --as-needed input file is determined
4806 not to be needed. */
4809 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4810 struct bfd_link_info *info)
4812 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4817 htab->dot_syms = NULL;
4821 /* If --just-symbols against a final linked binary, then assume we need
4822 toc adjusting stubs when calling functions defined there. */
4825 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4827 if ((sec->flags & SEC_CODE) != 0
4828 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4829 && is_ppc64_elf (sec->owner))
4831 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4833 && got->size >= elf_backend_got_header_size
4834 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4835 sec->has_toc_reloc = 1;
4837 _bfd_elf_link_just_syms (sec, info);
4840 static struct plt_entry **
4841 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4842 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4844 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4845 struct plt_entry **local_plt;
4846 unsigned char *local_got_tls_masks;
4848 if (local_got_ents == NULL)
4850 bfd_size_type size = symtab_hdr->sh_info;
4852 size *= (sizeof (*local_got_ents)
4853 + sizeof (*local_plt)
4854 + sizeof (*local_got_tls_masks));
4855 local_got_ents = bfd_zalloc (abfd, size);
4856 if (local_got_ents == NULL)
4858 elf_local_got_ents (abfd) = local_got_ents;
4861 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4863 struct got_entry *ent;
4865 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4866 if (ent->addend == r_addend
4867 && ent->owner == abfd
4868 && ent->tls_type == tls_type)
4872 bfd_size_type amt = sizeof (*ent);
4873 ent = bfd_alloc (abfd, amt);
4876 ent->next = local_got_ents[r_symndx];
4877 ent->addend = r_addend;
4879 ent->tls_type = tls_type;
4880 ent->is_indirect = FALSE;
4881 ent->got.refcount = 0;
4882 local_got_ents[r_symndx] = ent;
4884 ent->got.refcount += 1;
4887 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4888 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4889 local_got_tls_masks[r_symndx] |= tls_type;
4891 return local_plt + r_symndx;
4895 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4897 struct plt_entry *ent;
4899 for (ent = *plist; ent != NULL; ent = ent->next)
4900 if (ent->addend == addend)
4904 bfd_size_type amt = sizeof (*ent);
4905 ent = bfd_alloc (abfd, amt);
4909 ent->addend = addend;
4910 ent->plt.refcount = 0;
4913 ent->plt.refcount += 1;
4918 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4920 return (r_type == R_PPC64_REL24
4921 || r_type == R_PPC64_REL14
4922 || r_type == R_PPC64_REL14_BRTAKEN
4923 || r_type == R_PPC64_REL14_BRNTAKEN
4924 || r_type == R_PPC64_ADDR24
4925 || r_type == R_PPC64_ADDR14
4926 || r_type == R_PPC64_ADDR14_BRTAKEN
4927 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4930 /* Look through the relocs for a section during the first phase, and
4931 calculate needed space in the global offset table, procedure
4932 linkage table, and dynamic reloc sections. */
4935 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4936 asection *sec, const Elf_Internal_Rela *relocs)
4938 struct ppc_link_hash_table *htab;
4939 Elf_Internal_Shdr *symtab_hdr;
4940 struct elf_link_hash_entry **sym_hashes;
4941 const Elf_Internal_Rela *rel;
4942 const Elf_Internal_Rela *rel_end;
4944 asection **opd_sym_map;
4945 struct elf_link_hash_entry *tga, *dottga;
4947 if (info->relocatable)
4950 /* Don't do anything special with non-loaded, non-alloced sections.
4951 In particular, any relocs in such sections should not affect GOT
4952 and PLT reference counting (ie. we don't allow them to create GOT
4953 or PLT entries), there's no possibility or desire to optimize TLS
4954 relocs, and there's not much point in propagating relocs to shared
4955 libs that the dynamic linker won't relocate. */
4956 if ((sec->flags & SEC_ALLOC) == 0)
4959 BFD_ASSERT (is_ppc64_elf (abfd));
4961 htab = ppc_hash_table (info);
4965 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4966 FALSE, FALSE, TRUE);
4967 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4968 FALSE, FALSE, TRUE);
4969 symtab_hdr = &elf_symtab_hdr (abfd);
4970 sym_hashes = elf_sym_hashes (abfd);
4973 if (strcmp (sec->name, ".opd") == 0)
4975 /* Garbage collection needs some extra help with .opd sections.
4976 We don't want to necessarily keep everything referenced by
4977 relocs in .opd, as that would keep all functions. Instead,
4978 if we reference an .opd symbol (a function descriptor), we
4979 want to keep the function code symbol's section. This is
4980 easy for global symbols, but for local syms we need to keep
4981 information about the associated function section. */
4984 amt = sec->size * sizeof (*opd_sym_map) / 8;
4985 opd_sym_map = bfd_zalloc (abfd, amt);
4986 if (opd_sym_map == NULL)
4988 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4989 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4990 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4993 rel_end = relocs + sec->reloc_count;
4994 for (rel = relocs; rel < rel_end; rel++)
4996 unsigned long r_symndx;
4997 struct elf_link_hash_entry *h;
4998 enum elf_ppc64_reloc_type r_type;
5000 struct _ppc64_elf_section_data *ppc64_sec;
5001 struct plt_entry **ifunc;
5003 r_symndx = ELF64_R_SYM (rel->r_info);
5004 if (r_symndx < symtab_hdr->sh_info)
5008 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5009 h = elf_follow_link (h);
5011 /* PR15323, ref flags aren't set for references in the same
5013 h->root.non_ir_ref = 1;
5015 if (h == htab->elf.hgot)
5016 sec->has_toc_reloc = 1;
5023 if (h->type == STT_GNU_IFUNC)
5026 ifunc = &h->plt.plist;
5031 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5036 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5038 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5039 rel->r_addend, PLT_IFUNC);
5044 r_type = ELF64_R_TYPE (rel->r_info);
5045 if (is_branch_reloc (r_type))
5047 if (h != NULL && (h == tga || h == dottga))
5050 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5051 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5052 /* We have a new-style __tls_get_addr call with a marker
5056 /* Mark this section as having an old-style call. */
5057 sec->has_tls_get_addr_call = 1;
5060 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5062 && !update_plt_info (abfd, ifunc, rel->r_addend))
5070 /* These special tls relocs tie a call to __tls_get_addr with
5071 its parameter symbol. */
5074 case R_PPC64_GOT_TLSLD16:
5075 case R_PPC64_GOT_TLSLD16_LO:
5076 case R_PPC64_GOT_TLSLD16_HI:
5077 case R_PPC64_GOT_TLSLD16_HA:
5078 tls_type = TLS_TLS | TLS_LD;
5081 case R_PPC64_GOT_TLSGD16:
5082 case R_PPC64_GOT_TLSGD16_LO:
5083 case R_PPC64_GOT_TLSGD16_HI:
5084 case R_PPC64_GOT_TLSGD16_HA:
5085 tls_type = TLS_TLS | TLS_GD;
5088 case R_PPC64_GOT_TPREL16_DS:
5089 case R_PPC64_GOT_TPREL16_LO_DS:
5090 case R_PPC64_GOT_TPREL16_HI:
5091 case R_PPC64_GOT_TPREL16_HA:
5092 if (!info->executable)
5093 info->flags |= DF_STATIC_TLS;
5094 tls_type = TLS_TLS | TLS_TPREL;
5097 case R_PPC64_GOT_DTPREL16_DS:
5098 case R_PPC64_GOT_DTPREL16_LO_DS:
5099 case R_PPC64_GOT_DTPREL16_HI:
5100 case R_PPC64_GOT_DTPREL16_HA:
5101 tls_type = TLS_TLS | TLS_DTPREL;
5103 sec->has_tls_reloc = 1;
5107 case R_PPC64_GOT16_DS:
5108 case R_PPC64_GOT16_HA:
5109 case R_PPC64_GOT16_HI:
5110 case R_PPC64_GOT16_LO:
5111 case R_PPC64_GOT16_LO_DS:
5112 /* This symbol requires a global offset table entry. */
5113 sec->has_toc_reloc = 1;
5114 if (r_type == R_PPC64_GOT_TLSLD16
5115 || r_type == R_PPC64_GOT_TLSGD16
5116 || r_type == R_PPC64_GOT_TPREL16_DS
5117 || r_type == R_PPC64_GOT_DTPREL16_DS
5118 || r_type == R_PPC64_GOT16
5119 || r_type == R_PPC64_GOT16_DS)
5121 htab->do_multi_toc = 1;
5122 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5125 if (ppc64_elf_tdata (abfd)->got == NULL
5126 && !create_got_section (abfd, info))
5131 struct ppc_link_hash_entry *eh;
5132 struct got_entry *ent;
5134 eh = (struct ppc_link_hash_entry *) h;
5135 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5136 if (ent->addend == rel->r_addend
5137 && ent->owner == abfd
5138 && ent->tls_type == tls_type)
5142 bfd_size_type amt = sizeof (*ent);
5143 ent = bfd_alloc (abfd, amt);
5146 ent->next = eh->elf.got.glist;
5147 ent->addend = rel->r_addend;
5149 ent->tls_type = tls_type;
5150 ent->is_indirect = FALSE;
5151 ent->got.refcount = 0;
5152 eh->elf.got.glist = ent;
5154 ent->got.refcount += 1;
5155 eh->tls_mask |= tls_type;
5158 /* This is a global offset table entry for a local symbol. */
5159 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5160 rel->r_addend, tls_type))
5164 case R_PPC64_PLT16_HA:
5165 case R_PPC64_PLT16_HI:
5166 case R_PPC64_PLT16_LO:
5169 /* This symbol requires a procedure linkage table entry. We
5170 actually build the entry in adjust_dynamic_symbol,
5171 because this might be a case of linking PIC code without
5172 linking in any dynamic objects, in which case we don't
5173 need to generate a procedure linkage table after all. */
5176 /* It does not make sense to have a procedure linkage
5177 table entry for a local symbol. */
5178 bfd_set_error (bfd_error_bad_value);
5183 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5186 if (h->root.root.string[0] == '.'
5187 && h->root.root.string[1] != '\0')
5188 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5192 /* The following relocations don't need to propagate the
5193 relocation if linking a shared object since they are
5194 section relative. */
5195 case R_PPC64_SECTOFF:
5196 case R_PPC64_SECTOFF_LO:
5197 case R_PPC64_SECTOFF_HI:
5198 case R_PPC64_SECTOFF_HA:
5199 case R_PPC64_SECTOFF_DS:
5200 case R_PPC64_SECTOFF_LO_DS:
5201 case R_PPC64_DTPREL16:
5202 case R_PPC64_DTPREL16_LO:
5203 case R_PPC64_DTPREL16_HI:
5204 case R_PPC64_DTPREL16_HA:
5205 case R_PPC64_DTPREL16_DS:
5206 case R_PPC64_DTPREL16_LO_DS:
5207 case R_PPC64_DTPREL16_HIGHER:
5208 case R_PPC64_DTPREL16_HIGHERA:
5209 case R_PPC64_DTPREL16_HIGHEST:
5210 case R_PPC64_DTPREL16_HIGHESTA:
5215 case R_PPC64_REL16_LO:
5216 case R_PPC64_REL16_HI:
5217 case R_PPC64_REL16_HA:
5221 case R_PPC64_TOC16_DS:
5222 htab->do_multi_toc = 1;
5223 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5224 case R_PPC64_TOC16_LO:
5225 case R_PPC64_TOC16_HI:
5226 case R_PPC64_TOC16_HA:
5227 case R_PPC64_TOC16_LO_DS:
5228 sec->has_toc_reloc = 1;
5231 /* This relocation describes the C++ object vtable hierarchy.
5232 Reconstruct it for later use during GC. */
5233 case R_PPC64_GNU_VTINHERIT:
5234 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5238 /* This relocation describes which C++ vtable entries are actually
5239 used. Record for later use during GC. */
5240 case R_PPC64_GNU_VTENTRY:
5241 BFD_ASSERT (h != NULL);
5243 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5248 case R_PPC64_REL14_BRTAKEN:
5249 case R_PPC64_REL14_BRNTAKEN:
5251 asection *dest = NULL;
5253 /* Heuristic: If jumping outside our section, chances are
5254 we are going to need a stub. */
5257 /* If the sym is weak it may be overridden later, so
5258 don't assume we know where a weak sym lives. */
5259 if (h->root.type == bfd_link_hash_defined)
5260 dest = h->root.u.def.section;
5264 Elf_Internal_Sym *isym;
5266 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5271 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5275 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5280 if (h != NULL && ifunc == NULL)
5282 /* We may need a .plt entry if the function this reloc
5283 refers to is in a shared lib. */
5284 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5287 if (h->root.root.string[0] == '.'
5288 && h->root.root.string[1] != '\0')
5289 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5290 if (h == tga || h == dottga)
5291 sec->has_tls_reloc = 1;
5295 case R_PPC64_TPREL64:
5296 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5297 if (!info->executable)
5298 info->flags |= DF_STATIC_TLS;
5301 case R_PPC64_DTPMOD64:
5302 if (rel + 1 < rel_end
5303 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5304 && rel[1].r_offset == rel->r_offset + 8)
5305 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5307 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5310 case R_PPC64_DTPREL64:
5311 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5313 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5314 && rel[-1].r_offset == rel->r_offset - 8)
5315 /* This is the second reloc of a dtpmod, dtprel pair.
5316 Don't mark with TLS_DTPREL. */
5320 sec->has_tls_reloc = 1;
5323 struct ppc_link_hash_entry *eh;
5324 eh = (struct ppc_link_hash_entry *) h;
5325 eh->tls_mask |= tls_type;
5328 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5329 rel->r_addend, tls_type))
5332 ppc64_sec = ppc64_elf_section_data (sec);
5333 if (ppc64_sec->sec_type != sec_toc)
5337 /* One extra to simplify get_tls_mask. */
5338 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5339 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5340 if (ppc64_sec->u.toc.symndx == NULL)
5342 amt = sec->size * sizeof (bfd_vma) / 8;
5343 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5344 if (ppc64_sec->u.toc.add == NULL)
5346 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5347 ppc64_sec->sec_type = sec_toc;
5349 BFD_ASSERT (rel->r_offset % 8 == 0);
5350 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5351 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5353 /* Mark the second slot of a GD or LD entry.
5354 -1 to indicate GD and -2 to indicate LD. */
5355 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5356 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5357 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5358 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5361 case R_PPC64_TPREL16:
5362 case R_PPC64_TPREL16_LO:
5363 case R_PPC64_TPREL16_HI:
5364 case R_PPC64_TPREL16_HA:
5365 case R_PPC64_TPREL16_DS:
5366 case R_PPC64_TPREL16_LO_DS:
5367 case R_PPC64_TPREL16_HIGHER:
5368 case R_PPC64_TPREL16_HIGHERA:
5369 case R_PPC64_TPREL16_HIGHEST:
5370 case R_PPC64_TPREL16_HIGHESTA:
5373 if (!info->executable)
5374 info->flags |= DF_STATIC_TLS;
5379 case R_PPC64_ADDR64:
5380 if (opd_sym_map != NULL
5381 && rel + 1 < rel_end
5382 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5386 if (h->root.root.string[0] == '.'
5387 && h->root.root.string[1] != 0
5388 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5391 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5396 Elf_Internal_Sym *isym;
5398 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5403 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5404 if (s != NULL && s != sec)
5405 opd_sym_map[rel->r_offset / 8] = s;
5413 case R_PPC64_ADDR14:
5414 case R_PPC64_ADDR14_BRNTAKEN:
5415 case R_PPC64_ADDR14_BRTAKEN:
5416 case R_PPC64_ADDR16:
5417 case R_PPC64_ADDR16_DS:
5418 case R_PPC64_ADDR16_HA:
5419 case R_PPC64_ADDR16_HI:
5420 case R_PPC64_ADDR16_HIGHER:
5421 case R_PPC64_ADDR16_HIGHERA:
5422 case R_PPC64_ADDR16_HIGHEST:
5423 case R_PPC64_ADDR16_HIGHESTA:
5424 case R_PPC64_ADDR16_LO:
5425 case R_PPC64_ADDR16_LO_DS:
5426 case R_PPC64_ADDR24:
5427 case R_PPC64_ADDR32:
5428 case R_PPC64_UADDR16:
5429 case R_PPC64_UADDR32:
5430 case R_PPC64_UADDR64:
5432 if (h != NULL && !info->shared)
5433 /* We may need a copy reloc. */
5436 /* Don't propagate .opd relocs. */
5437 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5440 /* If we are creating a shared library, and this is a reloc
5441 against a global symbol, or a non PC relative reloc
5442 against a local symbol, then we need to copy the reloc
5443 into the shared library. However, if we are linking with
5444 -Bsymbolic, we do not need to copy a reloc against a
5445 global symbol which is defined in an object we are
5446 including in the link (i.e., DEF_REGULAR is set). At
5447 this point we have not seen all the input files, so it is
5448 possible that DEF_REGULAR is not set now but will be set
5449 later (it is never cleared). In case of a weak definition,
5450 DEF_REGULAR may be cleared later by a strong definition in
5451 a shared library. We account for that possibility below by
5452 storing information in the dyn_relocs field of the hash
5453 table entry. A similar situation occurs when creating
5454 shared libraries and symbol visibility changes render the
5457 If on the other hand, we are creating an executable, we
5458 may need to keep relocations for symbols satisfied by a
5459 dynamic library if we manage to avoid copy relocs for the
5463 && (must_be_dyn_reloc (info, r_type)
5465 && (!SYMBOLIC_BIND (info, h)
5466 || h->root.type == bfd_link_hash_defweak
5467 || !h->def_regular))))
5468 || (ELIMINATE_COPY_RELOCS
5471 && (h->root.type == bfd_link_hash_defweak
5472 || !h->def_regular))
5476 /* We must copy these reloc types into the output file.
5477 Create a reloc section in dynobj and make room for
5481 sreloc = _bfd_elf_make_dynamic_reloc_section
5482 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5488 /* If this is a global symbol, we count the number of
5489 relocations we need for this symbol. */
5492 struct elf_dyn_relocs *p;
5493 struct elf_dyn_relocs **head;
5495 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5497 if (p == NULL || p->sec != sec)
5499 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5509 if (!must_be_dyn_reloc (info, r_type))
5514 /* Track dynamic relocs needed for local syms too.
5515 We really need local syms available to do this
5517 struct ppc_dyn_relocs *p;
5518 struct ppc_dyn_relocs **head;
5519 bfd_boolean is_ifunc;
5522 Elf_Internal_Sym *isym;
5524 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5529 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5533 vpp = &elf_section_data (s)->local_dynrel;
5534 head = (struct ppc_dyn_relocs **) vpp;
5535 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5537 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5539 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5541 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5547 p->ifunc = is_ifunc;
5563 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5564 of the code entry point, and its section. */
5567 opd_entry_value (asection *opd_sec,
5569 asection **code_sec,
5571 bfd_boolean in_code_sec)
5573 bfd *opd_bfd = opd_sec->owner;
5574 Elf_Internal_Rela *relocs;
5575 Elf_Internal_Rela *lo, *hi, *look;
5578 /* No relocs implies we are linking a --just-symbols object, or looking
5579 at a final linked executable with addr2line or somesuch. */
5580 if (opd_sec->reloc_count == 0)
5582 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
5584 if (contents == NULL)
5586 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
5587 return (bfd_vma) -1;
5588 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
5591 val = bfd_get_64 (opd_bfd, contents + offset);
5592 if (code_sec != NULL)
5594 asection *sec, *likely = NULL;
5600 && val < sec->vma + sec->size)
5606 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5608 && (sec->flags & SEC_LOAD) != 0
5609 && (sec->flags & SEC_ALLOC) != 0)
5614 if (code_off != NULL)
5615 *code_off = val - likely->vma;
5621 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5623 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5625 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5627 /* Go find the opd reloc at the sym address. */
5629 BFD_ASSERT (lo != NULL);
5630 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5634 look = lo + (hi - lo) / 2;
5635 if (look->r_offset < offset)
5637 else if (look->r_offset > offset)
5641 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5643 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5644 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5646 unsigned long symndx = ELF64_R_SYM (look->r_info);
5649 if (symndx < symtab_hdr->sh_info
5650 || elf_sym_hashes (opd_bfd) == NULL)
5652 Elf_Internal_Sym *sym;
5654 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5657 size_t symcnt = symtab_hdr->sh_info;
5658 if (elf_sym_hashes (opd_bfd) == NULL)
5659 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5660 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5661 0, NULL, NULL, NULL);
5664 symtab_hdr->contents = (bfd_byte *) sym;
5668 val = sym->st_value;
5669 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5670 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5674 struct elf_link_hash_entry **sym_hashes;
5675 struct elf_link_hash_entry *rh;
5677 sym_hashes = elf_sym_hashes (opd_bfd);
5678 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5681 rh = elf_follow_link (rh);
5682 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5683 || rh->root.type == bfd_link_hash_defweak);
5684 val = rh->root.u.def.value;
5685 sec = rh->root.u.def.section;
5689 /* Handle the odd case where we can be called
5690 during bfd_elf_link_add_symbols before the
5691 symbol hashes have been fully populated. */
5692 Elf_Internal_Sym *sym;
5694 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
5695 symndx, NULL, NULL, NULL);
5699 val = sym->st_value;
5700 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5704 val += look->r_addend;
5705 if (code_off != NULL)
5707 if (code_sec != NULL)
5709 if (in_code_sec && *code_sec != sec)
5714 if (sec != NULL && sec->output_section != NULL)
5715 val += sec->output_section->vma + sec->output_offset;
5724 /* If the ELF symbol SYM might be a function in SEC, return the
5725 function size and set *CODE_OFF to the function's entry point,
5726 otherwise return zero. */
5728 static bfd_size_type
5729 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
5734 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
5735 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
5739 if (!(sym->flags & BSF_SYNTHETIC))
5740 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
5742 if (strcmp (sym->section->name, ".opd") == 0)
5744 if (opd_entry_value (sym->section, sym->value,
5745 &sec, code_off, TRUE) == (bfd_vma) -1)
5747 /* An old ABI binary with dot-syms has a size of 24 on the .opd
5748 symbol. This size has nothing to do with the code size of the
5749 function, which is what we're supposed to return, but the
5750 code size isn't available without looking up the dot-sym.
5751 However, doing that would be a waste of time particularly
5752 since elf_find_function will look at the dot-sym anyway.
5753 Now, elf_find_function will keep the largest size of any
5754 function sym found at the code address of interest, so return
5755 1 here to avoid it incorrectly caching a larger function size
5756 for a small function. This does mean we return the wrong
5757 size for a new-ABI function of size 24, but all that does is
5758 disable caching for such functions. */
5764 if (sym->section != sec)
5766 *code_off = sym->value;
5773 /* Return true if symbol is defined in a regular object file. */
5776 is_static_defined (struct elf_link_hash_entry *h)
5778 return ((h->root.type == bfd_link_hash_defined
5779 || h->root.type == bfd_link_hash_defweak)
5780 && h->root.u.def.section != NULL
5781 && h->root.u.def.section->output_section != NULL);
5784 /* If FDH is a function descriptor symbol, return the associated code
5785 entry symbol if it is defined. Return NULL otherwise. */
5787 static struct ppc_link_hash_entry *
5788 defined_code_entry (struct ppc_link_hash_entry *fdh)
5790 if (fdh->is_func_descriptor)
5792 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5793 if (fh->elf.root.type == bfd_link_hash_defined
5794 || fh->elf.root.type == bfd_link_hash_defweak)
5800 /* If FH is a function code entry symbol, return the associated
5801 function descriptor symbol if it is defined. Return NULL otherwise. */
5803 static struct ppc_link_hash_entry *
5804 defined_func_desc (struct ppc_link_hash_entry *fh)
5807 && fh->oh->is_func_descriptor)
5809 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5810 if (fdh->elf.root.type == bfd_link_hash_defined
5811 || fdh->elf.root.type == bfd_link_hash_defweak)
5817 /* Mark all our entry sym sections, both opd and code section. */
5820 ppc64_elf_gc_keep (struct bfd_link_info *info)
5822 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5823 struct bfd_sym_chain *sym;
5828 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5830 struct ppc_link_hash_entry *eh, *fh;
5833 eh = (struct ppc_link_hash_entry *)
5834 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5837 if (eh->elf.root.type != bfd_link_hash_defined
5838 && eh->elf.root.type != bfd_link_hash_defweak)
5841 fh = defined_code_entry (eh);
5844 sec = fh->elf.root.u.def.section;
5845 sec->flags |= SEC_KEEP;
5847 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5848 && opd_entry_value (eh->elf.root.u.def.section,
5849 eh->elf.root.u.def.value,
5850 &sec, NULL, FALSE) != (bfd_vma) -1)
5851 sec->flags |= SEC_KEEP;
5853 sec = eh->elf.root.u.def.section;
5854 sec->flags |= SEC_KEEP;
5858 /* Mark sections containing dynamically referenced symbols. When
5859 building shared libraries, we must assume that any visible symbol is
5863 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5865 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5866 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5867 struct ppc_link_hash_entry *fdh;
5869 /* Dynamic linking info is on the func descriptor sym. */
5870 fdh = defined_func_desc (eh);
5874 if ((eh->elf.root.type == bfd_link_hash_defined
5875 || eh->elf.root.type == bfd_link_hash_defweak)
5876 && (eh->elf.ref_dynamic
5877 || (!info->executable
5878 && eh->elf.def_regular
5879 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5880 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5881 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5882 || !bfd_hide_sym_by_version (info->version_info,
5883 eh->elf.root.root.string)))))
5886 struct ppc_link_hash_entry *fh;
5888 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5890 /* Function descriptor syms cause the associated
5891 function code sym section to be marked. */
5892 fh = defined_code_entry (eh);
5895 code_sec = fh->elf.root.u.def.section;
5896 code_sec->flags |= SEC_KEEP;
5898 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5899 && opd_entry_value (eh->elf.root.u.def.section,
5900 eh->elf.root.u.def.value,
5901 &code_sec, NULL, FALSE) != (bfd_vma) -1)
5902 code_sec->flags |= SEC_KEEP;
5908 /* Return the section that should be marked against GC for a given
5912 ppc64_elf_gc_mark_hook (asection *sec,
5913 struct bfd_link_info *info,
5914 Elf_Internal_Rela *rel,
5915 struct elf_link_hash_entry *h,
5916 Elf_Internal_Sym *sym)
5920 /* Syms return NULL if we're marking .opd, so we avoid marking all
5921 function sections, as all functions are referenced in .opd. */
5923 if (get_opd_info (sec) != NULL)
5928 enum elf_ppc64_reloc_type r_type;
5929 struct ppc_link_hash_entry *eh, *fh, *fdh;
5931 r_type = ELF64_R_TYPE (rel->r_info);
5934 case R_PPC64_GNU_VTINHERIT:
5935 case R_PPC64_GNU_VTENTRY:
5939 switch (h->root.type)
5941 case bfd_link_hash_defined:
5942 case bfd_link_hash_defweak:
5943 eh = (struct ppc_link_hash_entry *) h;
5944 fdh = defined_func_desc (eh);
5948 /* Function descriptor syms cause the associated
5949 function code sym section to be marked. */
5950 fh = defined_code_entry (eh);
5953 /* They also mark their opd section. */
5954 eh->elf.root.u.def.section->gc_mark = 1;
5956 rsec = fh->elf.root.u.def.section;
5958 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5959 && opd_entry_value (eh->elf.root.u.def.section,
5960 eh->elf.root.u.def.value,
5961 &rsec, NULL, FALSE) != (bfd_vma) -1)
5962 eh->elf.root.u.def.section->gc_mark = 1;
5964 rsec = h->root.u.def.section;
5967 case bfd_link_hash_common:
5968 rsec = h->root.u.c.p->section;
5972 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5978 struct _opd_sec_data *opd;
5980 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5981 opd = get_opd_info (rsec);
5982 if (opd != NULL && opd->func_sec != NULL)
5986 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5993 /* Update the .got, .plt. and dynamic reloc reference counts for the
5994 section being removed. */
5997 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5998 asection *sec, const Elf_Internal_Rela *relocs)
6000 struct ppc_link_hash_table *htab;
6001 Elf_Internal_Shdr *symtab_hdr;
6002 struct elf_link_hash_entry **sym_hashes;
6003 struct got_entry **local_got_ents;
6004 const Elf_Internal_Rela *rel, *relend;
6006 if (info->relocatable)
6009 if ((sec->flags & SEC_ALLOC) == 0)
6012 elf_section_data (sec)->local_dynrel = NULL;
6014 htab = ppc_hash_table (info);
6018 symtab_hdr = &elf_symtab_hdr (abfd);
6019 sym_hashes = elf_sym_hashes (abfd);
6020 local_got_ents = elf_local_got_ents (abfd);
6022 relend = relocs + sec->reloc_count;
6023 for (rel = relocs; rel < relend; rel++)
6025 unsigned long r_symndx;
6026 enum elf_ppc64_reloc_type r_type;
6027 struct elf_link_hash_entry *h = NULL;
6028 unsigned char tls_type = 0;
6030 r_symndx = ELF64_R_SYM (rel->r_info);
6031 r_type = ELF64_R_TYPE (rel->r_info);
6032 if (r_symndx >= symtab_hdr->sh_info)
6034 struct ppc_link_hash_entry *eh;
6035 struct elf_dyn_relocs **pp;
6036 struct elf_dyn_relocs *p;
6038 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6039 h = elf_follow_link (h);
6040 eh = (struct ppc_link_hash_entry *) h;
6042 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6045 /* Everything must go for SEC. */
6051 if (is_branch_reloc (r_type))
6053 struct plt_entry **ifunc = NULL;
6056 if (h->type == STT_GNU_IFUNC)
6057 ifunc = &h->plt.plist;
6059 else if (local_got_ents != NULL)
6061 struct plt_entry **local_plt = (struct plt_entry **)
6062 (local_got_ents + symtab_hdr->sh_info);
6063 unsigned char *local_got_tls_masks = (unsigned char *)
6064 (local_plt + symtab_hdr->sh_info);
6065 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6066 ifunc = local_plt + r_symndx;
6070 struct plt_entry *ent;
6072 for (ent = *ifunc; ent != NULL; ent = ent->next)
6073 if (ent->addend == rel->r_addend)
6077 if (ent->plt.refcount > 0)
6078 ent->plt.refcount -= 1;
6085 case R_PPC64_GOT_TLSLD16:
6086 case R_PPC64_GOT_TLSLD16_LO:
6087 case R_PPC64_GOT_TLSLD16_HI:
6088 case R_PPC64_GOT_TLSLD16_HA:
6089 tls_type = TLS_TLS | TLS_LD;
6092 case R_PPC64_GOT_TLSGD16:
6093 case R_PPC64_GOT_TLSGD16_LO:
6094 case R_PPC64_GOT_TLSGD16_HI:
6095 case R_PPC64_GOT_TLSGD16_HA:
6096 tls_type = TLS_TLS | TLS_GD;
6099 case R_PPC64_GOT_TPREL16_DS:
6100 case R_PPC64_GOT_TPREL16_LO_DS:
6101 case R_PPC64_GOT_TPREL16_HI:
6102 case R_PPC64_GOT_TPREL16_HA:
6103 tls_type = TLS_TLS | TLS_TPREL;
6106 case R_PPC64_GOT_DTPREL16_DS:
6107 case R_PPC64_GOT_DTPREL16_LO_DS:
6108 case R_PPC64_GOT_DTPREL16_HI:
6109 case R_PPC64_GOT_DTPREL16_HA:
6110 tls_type = TLS_TLS | TLS_DTPREL;
6114 case R_PPC64_GOT16_DS:
6115 case R_PPC64_GOT16_HA:
6116 case R_PPC64_GOT16_HI:
6117 case R_PPC64_GOT16_LO:
6118 case R_PPC64_GOT16_LO_DS:
6121 struct got_entry *ent;
6126 ent = local_got_ents[r_symndx];
6128 for (; ent != NULL; ent = ent->next)
6129 if (ent->addend == rel->r_addend
6130 && ent->owner == abfd
6131 && ent->tls_type == tls_type)
6135 if (ent->got.refcount > 0)
6136 ent->got.refcount -= 1;
6140 case R_PPC64_PLT16_HA:
6141 case R_PPC64_PLT16_HI:
6142 case R_PPC64_PLT16_LO:
6146 case R_PPC64_REL14_BRNTAKEN:
6147 case R_PPC64_REL14_BRTAKEN:
6151 struct plt_entry *ent;
6153 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6154 if (ent->addend == rel->r_addend)
6156 if (ent != NULL && ent->plt.refcount > 0)
6157 ent->plt.refcount -= 1;
6168 /* The maximum size of .sfpr. */
6169 #define SFPR_MAX (218*4)
6171 struct sfpr_def_parms
6173 const char name[12];
6174 unsigned char lo, hi;
6175 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6176 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6179 /* Auto-generate _save*, _rest* functions in .sfpr. */
6182 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6184 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6186 size_t len = strlen (parm->name);
6187 bfd_boolean writing = FALSE;
6193 memcpy (sym, parm->name, len);
6196 for (i = parm->lo; i <= parm->hi; i++)
6198 struct elf_link_hash_entry *h;
6200 sym[len + 0] = i / 10 + '0';
6201 sym[len + 1] = i % 10 + '0';
6202 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6206 h->root.type = bfd_link_hash_defined;
6207 h->root.u.def.section = htab->sfpr;
6208 h->root.u.def.value = htab->sfpr->size;
6211 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6213 if (htab->sfpr->contents == NULL)
6215 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6216 if (htab->sfpr->contents == NULL)
6222 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6224 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6226 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6227 htab->sfpr->size = p - htab->sfpr->contents;
6235 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6237 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6242 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6244 p = savegpr0 (abfd, p, r);
6245 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6247 bfd_put_32 (abfd, BLR, p);
6252 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6254 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6259 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6261 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6263 p = restgpr0 (abfd, p, r);
6264 bfd_put_32 (abfd, MTLR_R0, p);
6268 p = restgpr0 (abfd, p, 30);
6269 p = restgpr0 (abfd, p, 31);
6271 bfd_put_32 (abfd, BLR, p);
6276 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6278 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6283 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6285 p = savegpr1 (abfd, p, r);
6286 bfd_put_32 (abfd, BLR, p);
6291 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6293 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6298 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6300 p = restgpr1 (abfd, p, r);
6301 bfd_put_32 (abfd, BLR, p);
6306 savefpr (bfd *abfd, bfd_byte *p, int r)
6308 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6313 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6315 p = savefpr (abfd, p, r);
6316 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6318 bfd_put_32 (abfd, BLR, p);
6323 restfpr (bfd *abfd, bfd_byte *p, int r)
6325 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6330 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6332 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6334 p = restfpr (abfd, p, r);
6335 bfd_put_32 (abfd, MTLR_R0, p);
6339 p = restfpr (abfd, p, 30);
6340 p = restfpr (abfd, p, 31);
6342 bfd_put_32 (abfd, BLR, p);
6347 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6349 p = savefpr (abfd, p, r);
6350 bfd_put_32 (abfd, BLR, p);
6355 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6357 p = restfpr (abfd, p, r);
6358 bfd_put_32 (abfd, BLR, p);
6363 savevr (bfd *abfd, bfd_byte *p, int r)
6365 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6367 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6372 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6374 p = savevr (abfd, p, r);
6375 bfd_put_32 (abfd, BLR, p);
6380 restvr (bfd *abfd, bfd_byte *p, int r)
6382 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6384 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6389 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6391 p = restvr (abfd, p, r);
6392 bfd_put_32 (abfd, BLR, p);
6396 /* Called via elf_link_hash_traverse to transfer dynamic linking
6397 information on function code symbol entries to their corresponding
6398 function descriptor symbol entries. */
6401 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6403 struct bfd_link_info *info;
6404 struct ppc_link_hash_table *htab;
6405 struct plt_entry *ent;
6406 struct ppc_link_hash_entry *fh;
6407 struct ppc_link_hash_entry *fdh;
6408 bfd_boolean force_local;
6410 fh = (struct ppc_link_hash_entry *) h;
6411 if (fh->elf.root.type == bfd_link_hash_indirect)
6415 htab = ppc_hash_table (info);
6419 /* Resolve undefined references to dot-symbols as the value
6420 in the function descriptor, if we have one in a regular object.
6421 This is to satisfy cases like ".quad .foo". Calls to functions
6422 in dynamic objects are handled elsewhere. */
6423 if (fh->elf.root.type == bfd_link_hash_undefweak
6424 && fh->was_undefined
6425 && (fdh = defined_func_desc (fh)) != NULL
6426 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6427 && opd_entry_value (fdh->elf.root.u.def.section,
6428 fdh->elf.root.u.def.value,
6429 &fh->elf.root.u.def.section,
6430 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6432 fh->elf.root.type = fdh->elf.root.type;
6433 fh->elf.forced_local = 1;
6434 fh->elf.def_regular = fdh->elf.def_regular;
6435 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6438 /* If this is a function code symbol, transfer dynamic linking
6439 information to the function descriptor symbol. */
6443 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6444 if (ent->plt.refcount > 0)
6447 || fh->elf.root.root.string[0] != '.'
6448 || fh->elf.root.root.string[1] == '\0')
6451 /* Find the corresponding function descriptor symbol. Create it
6452 as undefined if necessary. */
6454 fdh = lookup_fdh (fh, htab);
6456 && !info->executable
6457 && (fh->elf.root.type == bfd_link_hash_undefined
6458 || fh->elf.root.type == bfd_link_hash_undefweak))
6460 fdh = make_fdh (info, fh);
6465 /* Fake function descriptors are made undefweak. If the function
6466 code symbol is strong undefined, make the fake sym the same.
6467 If the function code symbol is defined, then force the fake
6468 descriptor local; We can't support overriding of symbols in a
6469 shared library on a fake descriptor. */
6473 && fdh->elf.root.type == bfd_link_hash_undefweak)
6475 if (fh->elf.root.type == bfd_link_hash_undefined)
6477 fdh->elf.root.type = bfd_link_hash_undefined;
6478 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6480 else if (fh->elf.root.type == bfd_link_hash_defined
6481 || fh->elf.root.type == bfd_link_hash_defweak)
6483 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6488 && !fdh->elf.forced_local
6489 && (!info->executable
6490 || fdh->elf.def_dynamic
6491 || fdh->elf.ref_dynamic
6492 || (fdh->elf.root.type == bfd_link_hash_undefweak
6493 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6495 if (fdh->elf.dynindx == -1)
6496 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6498 fdh->elf.ref_regular |= fh->elf.ref_regular;
6499 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6500 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6501 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6502 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6504 move_plt_plist (fh, fdh);
6505 fdh->elf.needs_plt = 1;
6507 fdh->is_func_descriptor = 1;
6512 /* Now that the info is on the function descriptor, clear the
6513 function code sym info. Any function code syms for which we
6514 don't have a definition in a regular file, we force local.
6515 This prevents a shared library from exporting syms that have
6516 been imported from another library. Function code syms that
6517 are really in the library we must leave global to prevent the
6518 linker dragging in a definition from a static library. */
6519 force_local = (!fh->elf.def_regular
6521 || !fdh->elf.def_regular
6522 || fdh->elf.forced_local);
6523 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6528 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6529 this hook to a) provide some gcc support functions, and b) transfer
6530 dynamic linking information gathered so far on function code symbol
6531 entries, to their corresponding function descriptor symbol entries. */
6534 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6535 struct bfd_link_info *info)
6537 struct ppc_link_hash_table *htab;
6539 static const struct sfpr_def_parms funcs[] =
6541 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6542 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6543 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6544 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6545 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6546 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6547 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6548 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6549 { "._savef", 14, 31, savefpr, savefpr1_tail },
6550 { "._restf", 14, 31, restfpr, restfpr1_tail },
6551 { "_savevr_", 20, 31, savevr, savevr_tail },
6552 { "_restvr_", 20, 31, restvr, restvr_tail }
6555 htab = ppc_hash_table (info);
6559 if (!info->relocatable
6560 && htab->elf.hgot != NULL)
6561 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6563 if (htab->sfpr == NULL)
6564 /* We don't have any relocs. */
6567 /* Provide any missing _save* and _rest* functions. */
6568 htab->sfpr->size = 0;
6569 if (!info->relocatable)
6570 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6571 if (!sfpr_define (info, &funcs[i]))
6574 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6576 if (htab->sfpr->size == 0)
6577 htab->sfpr->flags |= SEC_EXCLUDE;
6582 /* Adjust a symbol defined by a dynamic object and referenced by a
6583 regular object. The current definition is in some section of the
6584 dynamic object, but we're not including those sections. We have to
6585 change the definition to something the rest of the link can
6589 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6590 struct elf_link_hash_entry *h)
6592 struct ppc_link_hash_table *htab;
6595 htab = ppc_hash_table (info);
6599 /* Deal with function syms. */
6600 if (h->type == STT_FUNC
6601 || h->type == STT_GNU_IFUNC
6604 /* Clear procedure linkage table information for any symbol that
6605 won't need a .plt entry. */
6606 struct plt_entry *ent;
6607 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6608 if (ent->plt.refcount > 0)
6611 || (h->type != STT_GNU_IFUNC
6612 && (SYMBOL_CALLS_LOCAL (info, h)
6613 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6614 && h->root.type == bfd_link_hash_undefweak))))
6616 h->plt.plist = NULL;
6621 h->plt.plist = NULL;
6623 /* If this is a weak symbol, and there is a real definition, the
6624 processor independent code will have arranged for us to see the
6625 real definition first, and we can just use the same value. */
6626 if (h->u.weakdef != NULL)
6628 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6629 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6630 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6631 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6632 if (ELIMINATE_COPY_RELOCS)
6633 h->non_got_ref = h->u.weakdef->non_got_ref;
6637 /* If we are creating a shared library, we must presume that the
6638 only references to the symbol are via the global offset table.
6639 For such cases we need not do anything here; the relocations will
6640 be handled correctly by relocate_section. */
6644 /* If there are no references to this symbol that do not use the
6645 GOT, we don't need to generate a copy reloc. */
6646 if (!h->non_got_ref)
6649 /* Don't generate a copy reloc for symbols defined in the executable. */
6650 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6653 if (ELIMINATE_COPY_RELOCS)
6655 struct ppc_link_hash_entry * eh;
6656 struct elf_dyn_relocs *p;
6658 eh = (struct ppc_link_hash_entry *) h;
6659 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6661 s = p->sec->output_section;
6662 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6666 /* If we didn't find any dynamic relocs in read-only sections, then
6667 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6675 if (h->plt.plist != NULL)
6677 /* We should never get here, but unfortunately there are versions
6678 of gcc out there that improperly (for this ABI) put initialized
6679 function pointers, vtable refs and suchlike in read-only
6680 sections. Allow them to proceed, but warn that this might
6681 break at runtime. */
6682 info->callbacks->einfo
6683 (_("%P: copy reloc against `%T' requires lazy plt linking; "
6684 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6685 h->root.root.string);
6688 /* This is a reference to a symbol defined by a dynamic object which
6689 is not a function. */
6691 /* We must allocate the symbol in our .dynbss section, which will
6692 become part of the .bss section of the executable. There will be
6693 an entry for this symbol in the .dynsym section. The dynamic
6694 object will contain position independent code, so all references
6695 from the dynamic object to this symbol will go through the global
6696 offset table. The dynamic linker will use the .dynsym entry to
6697 determine the address it must put in the global offset table, so
6698 both the dynamic object and the regular object will refer to the
6699 same memory location for the variable. */
6701 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6702 to copy the initial value out of the dynamic object and into the
6703 runtime process image. We need to remember the offset into the
6704 .rela.bss section we are going to use. */
6705 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6707 htab->relbss->size += sizeof (Elf64_External_Rela);
6713 return _bfd_elf_adjust_dynamic_copy (h, s);
6716 /* If given a function descriptor symbol, hide both the function code
6717 sym and the descriptor. */
6719 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6720 struct elf_link_hash_entry *h,
6721 bfd_boolean force_local)
6723 struct ppc_link_hash_entry *eh;
6724 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6726 eh = (struct ppc_link_hash_entry *) h;
6727 if (eh->is_func_descriptor)
6729 struct ppc_link_hash_entry *fh = eh->oh;
6734 struct ppc_link_hash_table *htab;
6737 /* We aren't supposed to use alloca in BFD because on
6738 systems which do not have alloca the version in libiberty
6739 calls xmalloc, which might cause the program to crash
6740 when it runs out of memory. This function doesn't have a
6741 return status, so there's no way to gracefully return an
6742 error. So cheat. We know that string[-1] can be safely
6743 accessed; It's either a string in an ELF string table,
6744 or allocated in an objalloc structure. */
6746 p = eh->elf.root.root.string - 1;
6749 htab = ppc_hash_table (info);
6753 fh = (struct ppc_link_hash_entry *)
6754 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6757 /* Unfortunately, if it so happens that the string we were
6758 looking for was allocated immediately before this string,
6759 then we overwrote the string terminator. That's the only
6760 reason the lookup should fail. */
6763 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6764 while (q >= eh->elf.root.root.string && *q == *p)
6766 if (q < eh->elf.root.root.string && *p == '.')
6767 fh = (struct ppc_link_hash_entry *)
6768 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6777 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6782 get_sym_h (struct elf_link_hash_entry **hp,
6783 Elf_Internal_Sym **symp,
6785 unsigned char **tls_maskp,
6786 Elf_Internal_Sym **locsymsp,
6787 unsigned long r_symndx,
6790 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6792 if (r_symndx >= symtab_hdr->sh_info)
6794 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6795 struct elf_link_hash_entry *h;
6797 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6798 h = elf_follow_link (h);
6806 if (symsecp != NULL)
6808 asection *symsec = NULL;
6809 if (h->root.type == bfd_link_hash_defined
6810 || h->root.type == bfd_link_hash_defweak)
6811 symsec = h->root.u.def.section;
6815 if (tls_maskp != NULL)
6817 struct ppc_link_hash_entry *eh;
6819 eh = (struct ppc_link_hash_entry *) h;
6820 *tls_maskp = &eh->tls_mask;
6825 Elf_Internal_Sym *sym;
6826 Elf_Internal_Sym *locsyms = *locsymsp;
6828 if (locsyms == NULL)
6830 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6831 if (locsyms == NULL)
6832 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6833 symtab_hdr->sh_info,
6834 0, NULL, NULL, NULL);
6835 if (locsyms == NULL)
6837 *locsymsp = locsyms;
6839 sym = locsyms + r_symndx;
6847 if (symsecp != NULL)
6848 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6850 if (tls_maskp != NULL)
6852 struct got_entry **lgot_ents;
6853 unsigned char *tls_mask;
6856 lgot_ents = elf_local_got_ents (ibfd);
6857 if (lgot_ents != NULL)
6859 struct plt_entry **local_plt = (struct plt_entry **)
6860 (lgot_ents + symtab_hdr->sh_info);
6861 unsigned char *lgot_masks = (unsigned char *)
6862 (local_plt + symtab_hdr->sh_info);
6863 tls_mask = &lgot_masks[r_symndx];
6865 *tls_maskp = tls_mask;
6871 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6872 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6873 type suitable for optimization, and 1 otherwise. */
6876 get_tls_mask (unsigned char **tls_maskp,
6877 unsigned long *toc_symndx,
6878 bfd_vma *toc_addend,
6879 Elf_Internal_Sym **locsymsp,
6880 const Elf_Internal_Rela *rel,
6883 unsigned long r_symndx;
6885 struct elf_link_hash_entry *h;
6886 Elf_Internal_Sym *sym;
6890 r_symndx = ELF64_R_SYM (rel->r_info);
6891 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6894 if ((*tls_maskp != NULL && **tls_maskp != 0)
6896 || ppc64_elf_section_data (sec) == NULL
6897 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6900 /* Look inside a TOC section too. */
6903 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6904 off = h->root.u.def.value;
6907 off = sym->st_value;
6908 off += rel->r_addend;
6909 BFD_ASSERT (off % 8 == 0);
6910 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6911 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6912 if (toc_symndx != NULL)
6913 *toc_symndx = r_symndx;
6914 if (toc_addend != NULL)
6915 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6916 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6918 if ((h == NULL || is_static_defined (h))
6919 && (next_r == -1 || next_r == -2))
6924 /* Find (or create) an entry in the tocsave hash table. */
6926 static struct tocsave_entry *
6927 tocsave_find (struct ppc_link_hash_table *htab,
6928 enum insert_option insert,
6929 Elf_Internal_Sym **local_syms,
6930 const Elf_Internal_Rela *irela,
6933 unsigned long r_indx;
6934 struct elf_link_hash_entry *h;
6935 Elf_Internal_Sym *sym;
6936 struct tocsave_entry ent, *p;
6938 struct tocsave_entry **slot;
6940 r_indx = ELF64_R_SYM (irela->r_info);
6941 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6943 if (ent.sec == NULL || ent.sec->output_section == NULL)
6945 (*_bfd_error_handler)
6946 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6951 ent.offset = h->root.u.def.value;
6953 ent.offset = sym->st_value;
6954 ent.offset += irela->r_addend;
6956 hash = tocsave_htab_hash (&ent);
6957 slot = ((struct tocsave_entry **)
6958 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6964 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6973 /* Adjust all global syms defined in opd sections. In gcc generated
6974 code for the old ABI, these will already have been done. */
6977 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6979 struct ppc_link_hash_entry *eh;
6981 struct _opd_sec_data *opd;
6983 if (h->root.type == bfd_link_hash_indirect)
6986 if (h->root.type != bfd_link_hash_defined
6987 && h->root.type != bfd_link_hash_defweak)
6990 eh = (struct ppc_link_hash_entry *) h;
6991 if (eh->adjust_done)
6994 sym_sec = eh->elf.root.u.def.section;
6995 opd = get_opd_info (sym_sec);
6996 if (opd != NULL && opd->adjust != NULL)
6998 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
7001 /* This entry has been deleted. */
7002 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7005 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7006 if (discarded_section (dsec))
7008 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7012 eh->elf.root.u.def.value = 0;
7013 eh->elf.root.u.def.section = dsec;
7016 eh->elf.root.u.def.value += adjust;
7017 eh->adjust_done = 1;
7022 /* Handles decrementing dynamic reloc counts for the reloc specified by
7023 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7024 have already been determined. */
7027 dec_dynrel_count (bfd_vma r_info,
7029 struct bfd_link_info *info,
7030 Elf_Internal_Sym **local_syms,
7031 struct elf_link_hash_entry *h,
7032 Elf_Internal_Sym *sym)
7034 enum elf_ppc64_reloc_type r_type;
7035 asection *sym_sec = NULL;
7037 /* Can this reloc be dynamic? This switch, and later tests here
7038 should be kept in sync with the code in check_relocs. */
7039 r_type = ELF64_R_TYPE (r_info);
7045 case R_PPC64_TPREL16:
7046 case R_PPC64_TPREL16_LO:
7047 case R_PPC64_TPREL16_HI:
7048 case R_PPC64_TPREL16_HA:
7049 case R_PPC64_TPREL16_DS:
7050 case R_PPC64_TPREL16_LO_DS:
7051 case R_PPC64_TPREL16_HIGHER:
7052 case R_PPC64_TPREL16_HIGHERA:
7053 case R_PPC64_TPREL16_HIGHEST:
7054 case R_PPC64_TPREL16_HIGHESTA:
7058 case R_PPC64_TPREL64:
7059 case R_PPC64_DTPMOD64:
7060 case R_PPC64_DTPREL64:
7061 case R_PPC64_ADDR64:
7065 case R_PPC64_ADDR14:
7066 case R_PPC64_ADDR14_BRNTAKEN:
7067 case R_PPC64_ADDR14_BRTAKEN:
7068 case R_PPC64_ADDR16:
7069 case R_PPC64_ADDR16_DS:
7070 case R_PPC64_ADDR16_HA:
7071 case R_PPC64_ADDR16_HI:
7072 case R_PPC64_ADDR16_HIGHER:
7073 case R_PPC64_ADDR16_HIGHERA:
7074 case R_PPC64_ADDR16_HIGHEST:
7075 case R_PPC64_ADDR16_HIGHESTA:
7076 case R_PPC64_ADDR16_LO:
7077 case R_PPC64_ADDR16_LO_DS:
7078 case R_PPC64_ADDR24:
7079 case R_PPC64_ADDR32:
7080 case R_PPC64_UADDR16:
7081 case R_PPC64_UADDR32:
7082 case R_PPC64_UADDR64:
7087 if (local_syms != NULL)
7089 unsigned long r_symndx;
7090 bfd *ibfd = sec->owner;
7092 r_symndx = ELF64_R_SYM (r_info);
7093 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7098 && (must_be_dyn_reloc (info, r_type)
7100 && (!SYMBOLIC_BIND (info, h)
7101 || h->root.type == bfd_link_hash_defweak
7102 || !h->def_regular))))
7103 || (ELIMINATE_COPY_RELOCS
7106 && (h->root.type == bfd_link_hash_defweak
7107 || !h->def_regular)))
7114 struct elf_dyn_relocs *p;
7115 struct elf_dyn_relocs **pp;
7116 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7118 /* elf_gc_sweep may have already removed all dyn relocs associated
7119 with local syms for a given section. Also, symbol flags are
7120 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7121 report a dynreloc miscount. */
7122 if (*pp == NULL && info->gc_sections)
7125 while ((p = *pp) != NULL)
7129 if (!must_be_dyn_reloc (info, r_type))
7141 struct ppc_dyn_relocs *p;
7142 struct ppc_dyn_relocs **pp;
7144 bfd_boolean is_ifunc;
7146 if (local_syms == NULL)
7147 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7148 if (sym_sec == NULL)
7151 vpp = &elf_section_data (sym_sec)->local_dynrel;
7152 pp = (struct ppc_dyn_relocs **) vpp;
7154 if (*pp == NULL && info->gc_sections)
7157 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7158 while ((p = *pp) != NULL)
7160 if (p->sec == sec && p->ifunc == is_ifunc)
7171 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7173 bfd_set_error (bfd_error_bad_value);
7177 /* Remove unused Official Procedure Descriptor entries. Currently we
7178 only remove those associated with functions in discarded link-once
7179 sections, or weakly defined functions that have been overridden. It
7180 would be possible to remove many more entries for statically linked
7184 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7187 bfd_boolean some_edited = FALSE;
7188 asection *need_pad = NULL;
7190 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7193 Elf_Internal_Rela *relstart, *rel, *relend;
7194 Elf_Internal_Shdr *symtab_hdr;
7195 Elf_Internal_Sym *local_syms;
7197 struct _opd_sec_data *opd;
7198 bfd_boolean need_edit, add_aux_fields;
7199 bfd_size_type cnt_16b = 0;
7201 if (!is_ppc64_elf (ibfd))
7204 sec = bfd_get_section_by_name (ibfd, ".opd");
7205 if (sec == NULL || sec->size == 0)
7208 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7211 if (sec->output_section == bfd_abs_section_ptr)
7214 /* Look through the section relocs. */
7215 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7219 symtab_hdr = &elf_symtab_hdr (ibfd);
7221 /* Read the relocations. */
7222 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7224 if (relstart == NULL)
7227 /* First run through the relocs to check they are sane, and to
7228 determine whether we need to edit this opd section. */
7232 relend = relstart + sec->reloc_count;
7233 for (rel = relstart; rel < relend; )
7235 enum elf_ppc64_reloc_type r_type;
7236 unsigned long r_symndx;
7238 struct elf_link_hash_entry *h;
7239 Elf_Internal_Sym *sym;
7241 /* .opd contains a regular array of 16 or 24 byte entries. We're
7242 only interested in the reloc pointing to a function entry
7244 if (rel->r_offset != offset
7245 || rel + 1 >= relend
7246 || (rel + 1)->r_offset != offset + 8)
7248 /* If someone messes with .opd alignment then after a
7249 "ld -r" we might have padding in the middle of .opd.
7250 Also, there's nothing to prevent someone putting
7251 something silly in .opd with the assembler. No .opd
7252 optimization for them! */
7254 (*_bfd_error_handler)
7255 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7260 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7261 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7263 (*_bfd_error_handler)
7264 (_("%B: unexpected reloc type %u in .opd section"),
7270 r_symndx = ELF64_R_SYM (rel->r_info);
7271 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7275 if (sym_sec == NULL || sym_sec->owner == NULL)
7277 const char *sym_name;
7279 sym_name = h->root.root.string;
7281 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7284 (*_bfd_error_handler)
7285 (_("%B: undefined sym `%s' in .opd section"),
7291 /* opd entries are always for functions defined in the
7292 current input bfd. If the symbol isn't defined in the
7293 input bfd, then we won't be using the function in this
7294 bfd; It must be defined in a linkonce section in another
7295 bfd, or is weak. It's also possible that we are
7296 discarding the function due to a linker script /DISCARD/,
7297 which we test for via the output_section. */
7298 if (sym_sec->owner != ibfd
7299 || sym_sec->output_section == bfd_abs_section_ptr)
7304 || (rel + 1 == relend && rel->r_offset == offset + 16))
7306 if (sec->size == offset + 24)
7311 if (rel == relend && sec->size == offset + 16)
7319 if (rel->r_offset == offset + 24)
7321 else if (rel->r_offset != offset + 16)
7323 else if (rel + 1 < relend
7324 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7325 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7330 else if (rel + 2 < relend
7331 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7332 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7341 add_aux_fields = non_overlapping && cnt_16b > 0;
7343 if (need_edit || add_aux_fields)
7345 Elf_Internal_Rela *write_rel;
7346 Elf_Internal_Shdr *rel_hdr;
7347 bfd_byte *rptr, *wptr;
7348 bfd_byte *new_contents;
7353 new_contents = NULL;
7354 amt = sec->size * sizeof (long) / 8;
7355 opd = &ppc64_elf_section_data (sec)->u.opd;
7356 opd->adjust = bfd_zalloc (sec->owner, amt);
7357 if (opd->adjust == NULL)
7359 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7361 /* This seems a waste of time as input .opd sections are all
7362 zeros as generated by gcc, but I suppose there's no reason
7363 this will always be so. We might start putting something in
7364 the third word of .opd entries. */
7365 if ((sec->flags & SEC_IN_MEMORY) == 0)
7368 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7373 if (local_syms != NULL
7374 && symtab_hdr->contents != (unsigned char *) local_syms)
7376 if (elf_section_data (sec)->relocs != relstart)
7380 sec->contents = loc;
7381 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7384 elf_section_data (sec)->relocs = relstart;
7386 new_contents = sec->contents;
7389 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7390 if (new_contents == NULL)
7394 wptr = new_contents;
7395 rptr = sec->contents;
7397 write_rel = relstart;
7401 for (rel = relstart; rel < relend; rel++)
7403 unsigned long r_symndx;
7405 struct elf_link_hash_entry *h;
7406 Elf_Internal_Sym *sym;
7408 r_symndx = ELF64_R_SYM (rel->r_info);
7409 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7413 if (rel->r_offset == offset)
7415 struct ppc_link_hash_entry *fdh = NULL;
7417 /* See if the .opd entry is full 24 byte or
7418 16 byte (with fd_aux entry overlapped with next
7421 if ((rel + 2 == relend && sec->size == offset + 16)
7422 || (rel + 3 < relend
7423 && rel[2].r_offset == offset + 16
7424 && rel[3].r_offset == offset + 24
7425 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7426 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7430 && h->root.root.string[0] == '.')
7432 struct ppc_link_hash_table *htab;
7434 htab = ppc_hash_table (info);
7436 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7439 && fdh->elf.root.type != bfd_link_hash_defined
7440 && fdh->elf.root.type != bfd_link_hash_defweak)
7444 skip = (sym_sec->owner != ibfd
7445 || sym_sec->output_section == bfd_abs_section_ptr);
7448 if (fdh != NULL && sym_sec->owner == ibfd)
7450 /* Arrange for the function descriptor sym
7452 fdh->elf.root.u.def.value = 0;
7453 fdh->elf.root.u.def.section = sym_sec;
7455 opd->adjust[rel->r_offset / 8] = -1;
7459 /* We'll be keeping this opd entry. */
7463 /* Redefine the function descriptor symbol to
7464 this location in the opd section. It is
7465 necessary to update the value here rather
7466 than using an array of adjustments as we do
7467 for local symbols, because various places
7468 in the generic ELF code use the value
7469 stored in u.def.value. */
7470 fdh->elf.root.u.def.value = wptr - new_contents;
7471 fdh->adjust_done = 1;
7474 /* Local syms are a bit tricky. We could
7475 tweak them as they can be cached, but
7476 we'd need to look through the local syms
7477 for the function descriptor sym which we
7478 don't have at the moment. So keep an
7479 array of adjustments. */
7480 opd->adjust[rel->r_offset / 8]
7481 = (wptr - new_contents) - (rptr - sec->contents);
7484 memcpy (wptr, rptr, opd_ent_size);
7485 wptr += opd_ent_size;
7486 if (add_aux_fields && opd_ent_size == 16)
7488 memset (wptr, '\0', 8);
7492 rptr += opd_ent_size;
7493 offset += opd_ent_size;
7499 && !info->relocatable
7500 && !dec_dynrel_count (rel->r_info, sec, info,
7506 /* We need to adjust any reloc offsets to point to the
7507 new opd entries. While we're at it, we may as well
7508 remove redundant relocs. */
7509 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7510 if (write_rel != rel)
7511 memcpy (write_rel, rel, sizeof (*rel));
7516 sec->size = wptr - new_contents;
7517 sec->reloc_count = write_rel - relstart;
7520 free (sec->contents);
7521 sec->contents = new_contents;
7524 /* Fudge the header size too, as this is used later in
7525 elf_bfd_final_link if we are emitting relocs. */
7526 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7527 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7530 else if (elf_section_data (sec)->relocs != relstart)
7533 if (local_syms != NULL
7534 && symtab_hdr->contents != (unsigned char *) local_syms)
7536 if (!info->keep_memory)
7539 symtab_hdr->contents = (unsigned char *) local_syms;
7544 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7546 /* If we are doing a final link and the last .opd entry is just 16 byte
7547 long, add a 8 byte padding after it. */
7548 if (need_pad != NULL && !info->relocatable)
7552 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7554 BFD_ASSERT (need_pad->size > 0);
7556 p = bfd_malloc (need_pad->size + 8);
7560 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7561 p, 0, need_pad->size))
7564 need_pad->contents = p;
7565 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7569 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7573 need_pad->contents = p;
7576 memset (need_pad->contents + need_pad->size, 0, 8);
7577 need_pad->size += 8;
7583 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7586 ppc64_elf_tls_setup (struct bfd_link_info *info,
7587 int no_tls_get_addr_opt,
7590 struct ppc_link_hash_table *htab;
7592 htab = ppc_hash_table (info);
7597 htab->do_multi_toc = 0;
7598 else if (!htab->do_multi_toc)
7601 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7602 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7603 FALSE, FALSE, TRUE));
7604 /* Move dynamic linking info to the function descriptor sym. */
7605 if (htab->tls_get_addr != NULL)
7606 func_desc_adjust (&htab->tls_get_addr->elf, info);
7607 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7608 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7609 FALSE, FALSE, TRUE));
7610 if (!no_tls_get_addr_opt)
7612 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7614 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7615 FALSE, FALSE, TRUE);
7617 func_desc_adjust (opt, info);
7618 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7619 FALSE, FALSE, TRUE);
7621 && (opt_fd->root.type == bfd_link_hash_defined
7622 || opt_fd->root.type == bfd_link_hash_defweak))
7624 /* If glibc supports an optimized __tls_get_addr call stub,
7625 signalled by the presence of __tls_get_addr_opt, and we'll
7626 be calling __tls_get_addr via a plt call stub, then
7627 make __tls_get_addr point to __tls_get_addr_opt. */
7628 tga_fd = &htab->tls_get_addr_fd->elf;
7629 if (htab->elf.dynamic_sections_created
7631 && (tga_fd->type == STT_FUNC
7632 || tga_fd->needs_plt)
7633 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7634 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7635 && tga_fd->root.type == bfd_link_hash_undefweak)))
7637 struct plt_entry *ent;
7639 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7640 if (ent->plt.refcount > 0)
7644 tga_fd->root.type = bfd_link_hash_indirect;
7645 tga_fd->root.u.i.link = &opt_fd->root;
7646 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7647 if (opt_fd->dynindx != -1)
7649 /* Use __tls_get_addr_opt in dynamic relocations. */
7650 opt_fd->dynindx = -1;
7651 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7652 opt_fd->dynstr_index);
7653 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7656 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7657 tga = &htab->tls_get_addr->elf;
7658 if (opt != NULL && tga != NULL)
7660 tga->root.type = bfd_link_hash_indirect;
7661 tga->root.u.i.link = &opt->root;
7662 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7663 _bfd_elf_link_hash_hide_symbol (info, opt,
7665 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7667 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7668 htab->tls_get_addr_fd->is_func_descriptor = 1;
7669 if (htab->tls_get_addr != NULL)
7671 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7672 htab->tls_get_addr->is_func = 1;
7678 no_tls_get_addr_opt = TRUE;
7680 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7681 return _bfd_elf_tls_setup (info->output_bfd, info);
7684 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7688 branch_reloc_hash_match (const bfd *ibfd,
7689 const Elf_Internal_Rela *rel,
7690 const struct ppc_link_hash_entry *hash1,
7691 const struct ppc_link_hash_entry *hash2)
7693 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7694 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7695 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7697 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7699 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7700 struct elf_link_hash_entry *h;
7702 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7703 h = elf_follow_link (h);
7704 if (h == &hash1->elf || h == &hash2->elf)
7710 /* Run through all the TLS relocs looking for optimization
7711 opportunities. The linker has been hacked (see ppc64elf.em) to do
7712 a preliminary section layout so that we know the TLS segment
7713 offsets. We can't optimize earlier because some optimizations need
7714 to know the tp offset, and we need to optimize before allocating
7715 dynamic relocations. */
7718 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7722 struct ppc_link_hash_table *htab;
7723 unsigned char *toc_ref;
7726 if (info->relocatable || !info->executable)
7729 htab = ppc_hash_table (info);
7733 /* Make two passes over the relocs. On the first pass, mark toc
7734 entries involved with tls relocs, and check that tls relocs
7735 involved in setting up a tls_get_addr call are indeed followed by
7736 such a call. If they are not, we can't do any tls optimization.
7737 On the second pass twiddle tls_mask flags to notify
7738 relocate_section that optimization can be done, and adjust got
7739 and plt refcounts. */
7741 for (pass = 0; pass < 2; ++pass)
7742 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7744 Elf_Internal_Sym *locsyms = NULL;
7745 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7747 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7748 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7750 Elf_Internal_Rela *relstart, *rel, *relend;
7751 bfd_boolean found_tls_get_addr_arg = 0;
7753 /* Read the relocations. */
7754 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7756 if (relstart == NULL)
7759 relend = relstart + sec->reloc_count;
7760 for (rel = relstart; rel < relend; rel++)
7762 enum elf_ppc64_reloc_type r_type;
7763 unsigned long r_symndx;
7764 struct elf_link_hash_entry *h;
7765 Elf_Internal_Sym *sym;
7767 unsigned char *tls_mask;
7768 unsigned char tls_set, tls_clear, tls_type = 0;
7770 bfd_boolean ok_tprel, is_local;
7771 long toc_ref_index = 0;
7772 int expecting_tls_get_addr = 0;
7773 bfd_boolean ret = FALSE;
7775 r_symndx = ELF64_R_SYM (rel->r_info);
7776 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7780 if (elf_section_data (sec)->relocs != relstart)
7782 if (toc_ref != NULL)
7785 && (elf_symtab_hdr (ibfd).contents
7786 != (unsigned char *) locsyms))
7793 if (h->root.type == bfd_link_hash_defined
7794 || h->root.type == bfd_link_hash_defweak)
7795 value = h->root.u.def.value;
7796 else if (h->root.type == bfd_link_hash_undefweak)
7800 found_tls_get_addr_arg = 0;
7805 /* Symbols referenced by TLS relocs must be of type
7806 STT_TLS. So no need for .opd local sym adjust. */
7807 value = sym->st_value;
7816 && h->root.type == bfd_link_hash_undefweak)
7820 value += sym_sec->output_offset;
7821 value += sym_sec->output_section->vma;
7822 value -= htab->elf.tls_sec->vma;
7823 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7824 < (bfd_vma) 1 << 32);
7828 r_type = ELF64_R_TYPE (rel->r_info);
7829 /* If this section has old-style __tls_get_addr calls
7830 without marker relocs, then check that each
7831 __tls_get_addr call reloc is preceded by a reloc
7832 that conceivably belongs to the __tls_get_addr arg
7833 setup insn. If we don't find matching arg setup
7834 relocs, don't do any tls optimization. */
7836 && sec->has_tls_get_addr_call
7838 && (h == &htab->tls_get_addr->elf
7839 || h == &htab->tls_get_addr_fd->elf)
7840 && !found_tls_get_addr_arg
7841 && is_branch_reloc (r_type))
7843 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7844 "TLS optimization disabled\n"),
7845 ibfd, sec, rel->r_offset);
7850 found_tls_get_addr_arg = 0;
7853 case R_PPC64_GOT_TLSLD16:
7854 case R_PPC64_GOT_TLSLD16_LO:
7855 expecting_tls_get_addr = 1;
7856 found_tls_get_addr_arg = 1;
7859 case R_PPC64_GOT_TLSLD16_HI:
7860 case R_PPC64_GOT_TLSLD16_HA:
7861 /* These relocs should never be against a symbol
7862 defined in a shared lib. Leave them alone if
7863 that turns out to be the case. */
7870 tls_type = TLS_TLS | TLS_LD;
7873 case R_PPC64_GOT_TLSGD16:
7874 case R_PPC64_GOT_TLSGD16_LO:
7875 expecting_tls_get_addr = 1;
7876 found_tls_get_addr_arg = 1;
7879 case R_PPC64_GOT_TLSGD16_HI:
7880 case R_PPC64_GOT_TLSGD16_HA:
7886 tls_set = TLS_TLS | TLS_TPRELGD;
7888 tls_type = TLS_TLS | TLS_GD;
7891 case R_PPC64_GOT_TPREL16_DS:
7892 case R_PPC64_GOT_TPREL16_LO_DS:
7893 case R_PPC64_GOT_TPREL16_HI:
7894 case R_PPC64_GOT_TPREL16_HA:
7899 tls_clear = TLS_TPREL;
7900 tls_type = TLS_TLS | TLS_TPREL;
7907 found_tls_get_addr_arg = 1;
7912 case R_PPC64_TOC16_LO:
7913 if (sym_sec == NULL || sym_sec != toc)
7916 /* Mark this toc entry as referenced by a TLS
7917 code sequence. We can do that now in the
7918 case of R_PPC64_TLS, and after checking for
7919 tls_get_addr for the TOC16 relocs. */
7920 if (toc_ref == NULL)
7921 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7922 if (toc_ref == NULL)
7926 value = h->root.u.def.value;
7928 value = sym->st_value;
7929 value += rel->r_addend;
7930 BFD_ASSERT (value < toc->size && value % 8 == 0);
7931 toc_ref_index = (value + toc->output_offset) / 8;
7932 if (r_type == R_PPC64_TLS
7933 || r_type == R_PPC64_TLSGD
7934 || r_type == R_PPC64_TLSLD)
7936 toc_ref[toc_ref_index] = 1;
7940 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7945 expecting_tls_get_addr = 2;
7948 case R_PPC64_TPREL64:
7952 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7957 tls_set = TLS_EXPLICIT;
7958 tls_clear = TLS_TPREL;
7963 case R_PPC64_DTPMOD64:
7967 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7969 if (rel + 1 < relend
7971 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7972 && rel[1].r_offset == rel->r_offset + 8)
7976 tls_set = TLS_EXPLICIT | TLS_GD;
7979 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7988 tls_set = TLS_EXPLICIT;
7999 if (!expecting_tls_get_addr
8000 || !sec->has_tls_get_addr_call)
8003 if (rel + 1 < relend
8004 && branch_reloc_hash_match (ibfd, rel + 1,
8006 htab->tls_get_addr_fd))
8008 if (expecting_tls_get_addr == 2)
8010 /* Check for toc tls entries. */
8011 unsigned char *toc_tls;
8014 retval = get_tls_mask (&toc_tls, NULL, NULL,
8019 if (toc_tls != NULL)
8021 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8022 found_tls_get_addr_arg = 1;
8024 toc_ref[toc_ref_index] = 1;
8030 if (expecting_tls_get_addr != 1)
8033 /* Uh oh, we didn't find the expected call. We
8034 could just mark this symbol to exclude it
8035 from tls optimization but it's safer to skip
8036 the entire optimization. */
8037 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8038 "TLS optimization disabled\n"),
8039 ibfd, sec, rel->r_offset);
8044 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8046 struct plt_entry *ent;
8047 for (ent = htab->tls_get_addr->elf.plt.plist;
8050 if (ent->addend == 0)
8052 if (ent->plt.refcount > 0)
8054 ent->plt.refcount -= 1;
8055 expecting_tls_get_addr = 0;
8061 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8063 struct plt_entry *ent;
8064 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8067 if (ent->addend == 0)
8069 if (ent->plt.refcount > 0)
8070 ent->plt.refcount -= 1;
8078 if ((tls_set & TLS_EXPLICIT) == 0)
8080 struct got_entry *ent;
8082 /* Adjust got entry for this reloc. */
8086 ent = elf_local_got_ents (ibfd)[r_symndx];
8088 for (; ent != NULL; ent = ent->next)
8089 if (ent->addend == rel->r_addend
8090 && ent->owner == ibfd
8091 && ent->tls_type == tls_type)
8098 /* We managed to get rid of a got entry. */
8099 if (ent->got.refcount > 0)
8100 ent->got.refcount -= 1;
8105 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8106 we'll lose one or two dyn relocs. */
8107 if (!dec_dynrel_count (rel->r_info, sec, info,
8111 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8113 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8119 *tls_mask |= tls_set;
8120 *tls_mask &= ~tls_clear;
8123 if (elf_section_data (sec)->relocs != relstart)
8128 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8130 if (!info->keep_memory)
8133 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8137 if (toc_ref != NULL)
8142 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8143 the values of any global symbols in a toc section that has been
8144 edited. Globals in toc sections should be a rarity, so this function
8145 sets a flag if any are found in toc sections other than the one just
8146 edited, so that futher hash table traversals can be avoided. */
8148 struct adjust_toc_info
8151 unsigned long *skip;
8152 bfd_boolean global_toc_syms;
8155 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8158 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8160 struct ppc_link_hash_entry *eh;
8161 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8164 if (h->root.type != bfd_link_hash_defined
8165 && h->root.type != bfd_link_hash_defweak)
8168 eh = (struct ppc_link_hash_entry *) h;
8169 if (eh->adjust_done)
8172 if (eh->elf.root.u.def.section == toc_inf->toc)
8174 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8175 i = toc_inf->toc->rawsize >> 3;
8177 i = eh->elf.root.u.def.value >> 3;
8179 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8181 (*_bfd_error_handler)
8182 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8185 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8186 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8189 eh->elf.root.u.def.value -= toc_inf->skip[i];
8190 eh->adjust_done = 1;
8192 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8193 toc_inf->global_toc_syms = TRUE;
8198 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8201 ok_lo_toc_insn (unsigned int insn)
8203 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8204 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8205 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8206 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8207 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8208 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8209 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8210 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8211 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8212 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8213 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8214 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8215 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8216 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8217 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8219 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8220 && ((insn & 3) == 0 || (insn & 3) == 3))
8221 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8224 /* Examine all relocs referencing .toc sections in order to remove
8225 unused .toc entries. */
8228 ppc64_elf_edit_toc (struct bfd_link_info *info)
8231 struct adjust_toc_info toc_inf;
8232 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8234 htab->do_toc_opt = 1;
8235 toc_inf.global_toc_syms = TRUE;
8236 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8238 asection *toc, *sec;
8239 Elf_Internal_Shdr *symtab_hdr;
8240 Elf_Internal_Sym *local_syms;
8241 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8242 unsigned long *skip, *drop;
8243 unsigned char *used;
8244 unsigned char *keep, last, some_unused;
8246 if (!is_ppc64_elf (ibfd))
8249 toc = bfd_get_section_by_name (ibfd, ".toc");
8252 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8253 || discarded_section (toc))
8258 symtab_hdr = &elf_symtab_hdr (ibfd);
8260 /* Look at sections dropped from the final link. */
8263 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8265 if (sec->reloc_count == 0
8266 || !discarded_section (sec)
8267 || get_opd_info (sec)
8268 || (sec->flags & SEC_ALLOC) == 0
8269 || (sec->flags & SEC_DEBUGGING) != 0)
8272 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8273 if (relstart == NULL)
8276 /* Run through the relocs to see which toc entries might be
8278 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8280 enum elf_ppc64_reloc_type r_type;
8281 unsigned long r_symndx;
8283 struct elf_link_hash_entry *h;
8284 Elf_Internal_Sym *sym;
8287 r_type = ELF64_R_TYPE (rel->r_info);
8294 case R_PPC64_TOC16_LO:
8295 case R_PPC64_TOC16_HI:
8296 case R_PPC64_TOC16_HA:
8297 case R_PPC64_TOC16_DS:
8298 case R_PPC64_TOC16_LO_DS:
8302 r_symndx = ELF64_R_SYM (rel->r_info);
8303 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8311 val = h->root.u.def.value;
8313 val = sym->st_value;
8314 val += rel->r_addend;
8316 if (val >= toc->size)
8319 /* Anything in the toc ought to be aligned to 8 bytes.
8320 If not, don't mark as unused. */
8326 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8331 skip[val >> 3] = ref_from_discarded;
8334 if (elf_section_data (sec)->relocs != relstart)
8338 /* For largetoc loads of address constants, we can convert
8339 . addis rx,2,addr@got@ha
8340 . ld ry,addr@got@l(rx)
8342 . addis rx,2,addr@toc@ha
8343 . addi ry,rx,addr@toc@l
8344 when addr is within 2G of the toc pointer. This then means
8345 that the word storing "addr" in the toc is no longer needed. */
8347 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8348 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8349 && toc->reloc_count != 0)
8351 /* Read toc relocs. */
8352 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8354 if (toc_relocs == NULL)
8357 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8359 enum elf_ppc64_reloc_type r_type;
8360 unsigned long r_symndx;
8362 struct elf_link_hash_entry *h;
8363 Elf_Internal_Sym *sym;
8366 r_type = ELF64_R_TYPE (rel->r_info);
8367 if (r_type != R_PPC64_ADDR64)
8370 r_symndx = ELF64_R_SYM (rel->r_info);
8371 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8376 || discarded_section (sym_sec))
8379 if (!SYMBOL_CALLS_LOCAL (info, h))
8384 if (h->type == STT_GNU_IFUNC)
8386 val = h->root.u.def.value;
8390 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8392 val = sym->st_value;
8394 val += rel->r_addend;
8395 val += sym_sec->output_section->vma + sym_sec->output_offset;
8397 /* We don't yet know the exact toc pointer value, but we
8398 know it will be somewhere in the toc section. Don't
8399 optimize if the difference from any possible toc
8400 pointer is outside [ff..f80008000, 7fff7fff]. */
8401 addr = toc->output_section->vma + TOC_BASE_OFF;
8402 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8405 addr = toc->output_section->vma + toc->output_section->rawsize;
8406 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8411 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8416 skip[rel->r_offset >> 3]
8417 |= can_optimize | ((rel - toc_relocs) << 2);
8424 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8428 if (local_syms != NULL
8429 && symtab_hdr->contents != (unsigned char *) local_syms)
8433 && elf_section_data (sec)->relocs != relstart)
8435 if (toc_relocs != NULL
8436 && elf_section_data (toc)->relocs != toc_relocs)
8443 /* Now check all kept sections that might reference the toc.
8444 Check the toc itself last. */
8445 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8448 sec = (sec == toc ? NULL
8449 : sec->next == NULL ? toc
8450 : sec->next == toc && toc->next ? toc->next
8455 if (sec->reloc_count == 0
8456 || discarded_section (sec)
8457 || get_opd_info (sec)
8458 || (sec->flags & SEC_ALLOC) == 0
8459 || (sec->flags & SEC_DEBUGGING) != 0)
8462 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8464 if (relstart == NULL)
8467 /* Mark toc entries referenced as used. */
8471 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8473 enum elf_ppc64_reloc_type r_type;
8474 unsigned long r_symndx;
8476 struct elf_link_hash_entry *h;
8477 Elf_Internal_Sym *sym;
8479 enum {no_check, check_lo, check_ha} insn_check;
8481 r_type = ELF64_R_TYPE (rel->r_info);
8485 insn_check = no_check;
8488 case R_PPC64_GOT_TLSLD16_HA:
8489 case R_PPC64_GOT_TLSGD16_HA:
8490 case R_PPC64_GOT_TPREL16_HA:
8491 case R_PPC64_GOT_DTPREL16_HA:
8492 case R_PPC64_GOT16_HA:
8493 case R_PPC64_TOC16_HA:
8494 insn_check = check_ha;
8497 case R_PPC64_GOT_TLSLD16_LO:
8498 case R_PPC64_GOT_TLSGD16_LO:
8499 case R_PPC64_GOT_TPREL16_LO_DS:
8500 case R_PPC64_GOT_DTPREL16_LO_DS:
8501 case R_PPC64_GOT16_LO:
8502 case R_PPC64_GOT16_LO_DS:
8503 case R_PPC64_TOC16_LO:
8504 case R_PPC64_TOC16_LO_DS:
8505 insn_check = check_lo;
8509 if (insn_check != no_check)
8511 bfd_vma off = rel->r_offset & ~3;
8512 unsigned char buf[4];
8515 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8520 insn = bfd_get_32 (ibfd, buf);
8521 if (insn_check == check_lo
8522 ? !ok_lo_toc_insn (insn)
8523 : ((insn & ((0x3f << 26) | 0x1f << 16))
8524 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8528 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8529 sprintf (str, "%#08x", insn);
8530 info->callbacks->einfo
8531 (_("%P: %H: toc optimization is not supported for"
8532 " %s instruction.\n"),
8533 ibfd, sec, rel->r_offset & ~3, str);
8540 case R_PPC64_TOC16_LO:
8541 case R_PPC64_TOC16_HI:
8542 case R_PPC64_TOC16_HA:
8543 case R_PPC64_TOC16_DS:
8544 case R_PPC64_TOC16_LO_DS:
8545 /* In case we're taking addresses of toc entries. */
8546 case R_PPC64_ADDR64:
8553 r_symndx = ELF64_R_SYM (rel->r_info);
8554 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8565 val = h->root.u.def.value;
8567 val = sym->st_value;
8568 val += rel->r_addend;
8570 if (val >= toc->size)
8573 if ((skip[val >> 3] & can_optimize) != 0)
8580 case R_PPC64_TOC16_HA:
8583 case R_PPC64_TOC16_LO_DS:
8584 off = rel->r_offset;
8585 off += (bfd_big_endian (ibfd) ? -2 : 3);
8586 if (!bfd_get_section_contents (ibfd, sec, &opc,
8592 if ((opc & (0x3f << 2)) == (58u << 2))
8597 /* Wrong sort of reloc, or not a ld. We may
8598 as well clear ref_from_discarded too. */
8605 /* For the toc section, we only mark as used if this
8606 entry itself isn't unused. */
8607 else if ((used[rel->r_offset >> 3]
8608 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8611 /* Do all the relocs again, to catch reference
8620 if (elf_section_data (sec)->relocs != relstart)
8624 /* Merge the used and skip arrays. Assume that TOC
8625 doublewords not appearing as either used or unused belong
8626 to to an entry more than one doubleword in size. */
8627 for (drop = skip, keep = used, last = 0, some_unused = 0;
8628 drop < skip + (toc->size + 7) / 8;
8633 *drop &= ~ref_from_discarded;
8634 if ((*drop & can_optimize) != 0)
8638 else if ((*drop & ref_from_discarded) != 0)
8641 last = ref_from_discarded;
8651 bfd_byte *contents, *src;
8653 Elf_Internal_Sym *sym;
8654 bfd_boolean local_toc_syms = FALSE;
8656 /* Shuffle the toc contents, and at the same time convert the
8657 skip array from booleans into offsets. */
8658 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8661 elf_section_data (toc)->this_hdr.contents = contents;
8663 for (src = contents, off = 0, drop = skip;
8664 src < contents + toc->size;
8667 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8672 memcpy (src - off, src, 8);
8676 toc->rawsize = toc->size;
8677 toc->size = src - contents - off;
8679 /* Adjust addends for relocs against the toc section sym,
8680 and optimize any accesses we can. */
8681 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8683 if (sec->reloc_count == 0
8684 || discarded_section (sec))
8687 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8689 if (relstart == NULL)
8692 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8694 enum elf_ppc64_reloc_type r_type;
8695 unsigned long r_symndx;
8697 struct elf_link_hash_entry *h;
8700 r_type = ELF64_R_TYPE (rel->r_info);
8707 case R_PPC64_TOC16_LO:
8708 case R_PPC64_TOC16_HI:
8709 case R_PPC64_TOC16_HA:
8710 case R_PPC64_TOC16_DS:
8711 case R_PPC64_TOC16_LO_DS:
8712 case R_PPC64_ADDR64:
8716 r_symndx = ELF64_R_SYM (rel->r_info);
8717 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8725 val = h->root.u.def.value;
8728 val = sym->st_value;
8730 local_toc_syms = TRUE;
8733 val += rel->r_addend;
8735 if (val > toc->rawsize)
8737 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8739 else if ((skip[val >> 3] & can_optimize) != 0)
8741 Elf_Internal_Rela *tocrel
8742 = toc_relocs + (skip[val >> 3] >> 2);
8743 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8747 case R_PPC64_TOC16_HA:
8748 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8751 case R_PPC64_TOC16_LO_DS:
8752 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8756 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8758 info->callbacks->einfo
8759 (_("%P: %H: %s references "
8760 "optimized away TOC entry\n"),
8761 ibfd, sec, rel->r_offset,
8762 ppc64_elf_howto_table[r_type]->name);
8763 bfd_set_error (bfd_error_bad_value);
8766 rel->r_addend = tocrel->r_addend;
8767 elf_section_data (sec)->relocs = relstart;
8771 if (h != NULL || sym->st_value != 0)
8774 rel->r_addend -= skip[val >> 3];
8775 elf_section_data (sec)->relocs = relstart;
8778 if (elf_section_data (sec)->relocs != relstart)
8782 /* We shouldn't have local or global symbols defined in the TOC,
8783 but handle them anyway. */
8784 if (local_syms != NULL)
8785 for (sym = local_syms;
8786 sym < local_syms + symtab_hdr->sh_info;
8788 if (sym->st_value != 0
8789 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8793 if (sym->st_value > toc->rawsize)
8794 i = toc->rawsize >> 3;
8796 i = sym->st_value >> 3;
8798 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8801 (*_bfd_error_handler)
8802 (_("%s defined on removed toc entry"),
8803 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8806 while ((skip[i] & (ref_from_discarded | can_optimize)));
8807 sym->st_value = (bfd_vma) i << 3;
8810 sym->st_value -= skip[i];
8811 symtab_hdr->contents = (unsigned char *) local_syms;
8814 /* Adjust any global syms defined in this toc input section. */
8815 if (toc_inf.global_toc_syms)
8818 toc_inf.skip = skip;
8819 toc_inf.global_toc_syms = FALSE;
8820 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8824 if (toc->reloc_count != 0)
8826 Elf_Internal_Shdr *rel_hdr;
8827 Elf_Internal_Rela *wrel;
8830 /* Remove unused toc relocs, and adjust those we keep. */
8831 if (toc_relocs == NULL)
8832 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8834 if (toc_relocs == NULL)
8838 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8839 if ((skip[rel->r_offset >> 3]
8840 & (ref_from_discarded | can_optimize)) == 0)
8842 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8843 wrel->r_info = rel->r_info;
8844 wrel->r_addend = rel->r_addend;
8847 else if (!dec_dynrel_count (rel->r_info, toc, info,
8848 &local_syms, NULL, NULL))
8851 elf_section_data (toc)->relocs = toc_relocs;
8852 toc->reloc_count = wrel - toc_relocs;
8853 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8854 sz = rel_hdr->sh_entsize;
8855 rel_hdr->sh_size = toc->reloc_count * sz;
8858 else if (toc_relocs != NULL
8859 && elf_section_data (toc)->relocs != toc_relocs)
8862 if (local_syms != NULL
8863 && symtab_hdr->contents != (unsigned char *) local_syms)
8865 if (!info->keep_memory)
8868 symtab_hdr->contents = (unsigned char *) local_syms;
8876 /* Return true iff input section I references the TOC using
8877 instructions limited to +/-32k offsets. */
8880 ppc64_elf_has_small_toc_reloc (asection *i)
8882 return (is_ppc64_elf (i->owner)
8883 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8886 /* Allocate space for one GOT entry. */
8889 allocate_got (struct elf_link_hash_entry *h,
8890 struct bfd_link_info *info,
8891 struct got_entry *gent)
8893 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8895 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8896 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8898 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8899 ? 2 : 1) * sizeof (Elf64_External_Rela);
8900 asection *got = ppc64_elf_tdata (gent->owner)->got;
8902 gent->got.offset = got->size;
8903 got->size += entsize;
8905 dyn = htab->elf.dynamic_sections_created;
8906 if (h->type == STT_GNU_IFUNC)
8908 htab->reliplt->size += rentsize;
8909 htab->got_reli_size += rentsize;
8911 else if ((info->shared
8912 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8913 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8914 || h->root.type != bfd_link_hash_undefweak))
8916 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8917 relgot->size += rentsize;
8921 /* This function merges got entries in the same toc group. */
8924 merge_got_entries (struct got_entry **pent)
8926 struct got_entry *ent, *ent2;
8928 for (ent = *pent; ent != NULL; ent = ent->next)
8929 if (!ent->is_indirect)
8930 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8931 if (!ent2->is_indirect
8932 && ent2->addend == ent->addend
8933 && ent2->tls_type == ent->tls_type
8934 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8936 ent2->is_indirect = TRUE;
8937 ent2->got.ent = ent;
8941 /* Allocate space in .plt, .got and associated reloc sections for
8945 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8947 struct bfd_link_info *info;
8948 struct ppc_link_hash_table *htab;
8950 struct ppc_link_hash_entry *eh;
8951 struct elf_dyn_relocs *p;
8952 struct got_entry **pgent, *gent;
8954 if (h->root.type == bfd_link_hash_indirect)
8957 info = (struct bfd_link_info *) inf;
8958 htab = ppc_hash_table (info);
8962 if ((htab->elf.dynamic_sections_created
8964 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8965 || h->type == STT_GNU_IFUNC)
8967 struct plt_entry *pent;
8968 bfd_boolean doneone = FALSE;
8969 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8970 if (pent->plt.refcount > 0)
8972 if (!htab->elf.dynamic_sections_created
8973 || h->dynindx == -1)
8976 pent->plt.offset = s->size;
8977 s->size += PLT_ENTRY_SIZE;
8982 /* If this is the first .plt entry, make room for the special
8986 s->size += PLT_INITIAL_ENTRY_SIZE;
8988 pent->plt.offset = s->size;
8990 /* Make room for this entry. */
8991 s->size += PLT_ENTRY_SIZE;
8993 /* Make room for the .glink code. */
8996 s->size += GLINK_CALL_STUB_SIZE;
8997 /* We need bigger stubs past index 32767. */
8998 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9002 /* We also need to make an entry in the .rela.plt section. */
9005 s->size += sizeof (Elf64_External_Rela);
9009 pent->plt.offset = (bfd_vma) -1;
9012 h->plt.plist = NULL;
9018 h->plt.plist = NULL;
9022 eh = (struct ppc_link_hash_entry *) h;
9023 /* Run through the TLS GD got entries first if we're changing them
9025 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9026 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9027 if (gent->got.refcount > 0
9028 && (gent->tls_type & TLS_GD) != 0)
9030 /* This was a GD entry that has been converted to TPREL. If
9031 there happens to be a TPREL entry we can use that one. */
9032 struct got_entry *ent;
9033 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9034 if (ent->got.refcount > 0
9035 && (ent->tls_type & TLS_TPREL) != 0
9036 && ent->addend == gent->addend
9037 && ent->owner == gent->owner)
9039 gent->got.refcount = 0;
9043 /* If not, then we'll be using our own TPREL entry. */
9044 if (gent->got.refcount != 0)
9045 gent->tls_type = TLS_TLS | TLS_TPREL;
9048 /* Remove any list entry that won't generate a word in the GOT before
9049 we call merge_got_entries. Otherwise we risk merging to empty
9051 pgent = &h->got.glist;
9052 while ((gent = *pgent) != NULL)
9053 if (gent->got.refcount > 0)
9055 if ((gent->tls_type & TLS_LD) != 0
9058 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9059 *pgent = gent->next;
9062 pgent = &gent->next;
9065 *pgent = gent->next;
9067 if (!htab->do_multi_toc)
9068 merge_got_entries (&h->got.glist);
9070 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9071 if (!gent->is_indirect)
9073 /* Make sure this symbol is output as a dynamic symbol.
9074 Undefined weak syms won't yet be marked as dynamic,
9075 nor will all TLS symbols. */
9076 if (h->dynindx == -1
9078 && h->type != STT_GNU_IFUNC
9079 && htab->elf.dynamic_sections_created)
9081 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9085 if (!is_ppc64_elf (gent->owner))
9088 allocate_got (h, info, gent);
9091 if (eh->dyn_relocs == NULL
9092 || (!htab->elf.dynamic_sections_created
9093 && h->type != STT_GNU_IFUNC))
9096 /* In the shared -Bsymbolic case, discard space allocated for
9097 dynamic pc-relative relocs against symbols which turn out to be
9098 defined in regular objects. For the normal shared case, discard
9099 space for relocs that have become local due to symbol visibility
9104 /* Relocs that use pc_count are those that appear on a call insn,
9105 or certain REL relocs (see must_be_dyn_reloc) that can be
9106 generated via assembly. We want calls to protected symbols to
9107 resolve directly to the function rather than going via the plt.
9108 If people want function pointer comparisons to work as expected
9109 then they should avoid writing weird assembly. */
9110 if (SYMBOL_CALLS_LOCAL (info, h))
9112 struct elf_dyn_relocs **pp;
9114 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9116 p->count -= p->pc_count;
9125 /* Also discard relocs on undefined weak syms with non-default
9127 if (eh->dyn_relocs != NULL
9128 && h->root.type == bfd_link_hash_undefweak)
9130 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9131 eh->dyn_relocs = NULL;
9133 /* Make sure this symbol is output as a dynamic symbol.
9134 Undefined weak syms won't yet be marked as dynamic. */
9135 else if (h->dynindx == -1
9136 && !h->forced_local)
9138 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9143 else if (h->type == STT_GNU_IFUNC)
9145 if (!h->non_got_ref)
9146 eh->dyn_relocs = NULL;
9148 else if (ELIMINATE_COPY_RELOCS)
9150 /* For the non-shared case, discard space for relocs against
9151 symbols which turn out to need copy relocs or are not
9157 /* Make sure this symbol is output as a dynamic symbol.
9158 Undefined weak syms won't yet be marked as dynamic. */
9159 if (h->dynindx == -1
9160 && !h->forced_local)
9162 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9166 /* If that succeeded, we know we'll be keeping all the
9168 if (h->dynindx != -1)
9172 eh->dyn_relocs = NULL;
9177 /* Finally, allocate space. */
9178 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9180 asection *sreloc = elf_section_data (p->sec)->sreloc;
9181 if (eh->elf.type == STT_GNU_IFUNC)
9182 sreloc = htab->reliplt;
9183 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9189 /* Find any dynamic relocs that apply to read-only sections. */
9192 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9194 struct ppc_link_hash_entry *eh;
9195 struct elf_dyn_relocs *p;
9197 eh = (struct ppc_link_hash_entry *) h;
9198 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9200 asection *s = p->sec->output_section;
9202 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9204 struct bfd_link_info *info = inf;
9206 info->flags |= DF_TEXTREL;
9208 /* Not an error, just cut short the traversal. */
9215 /* Set the sizes of the dynamic sections. */
9218 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9219 struct bfd_link_info *info)
9221 struct ppc_link_hash_table *htab;
9226 struct got_entry *first_tlsld;
9228 htab = ppc_hash_table (info);
9232 dynobj = htab->elf.dynobj;
9236 if (htab->elf.dynamic_sections_created)
9238 /* Set the contents of the .interp section to the interpreter. */
9239 if (info->executable)
9241 s = bfd_get_linker_section (dynobj, ".interp");
9244 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9245 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9249 /* Set up .got offsets for local syms, and space for local dynamic
9251 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9253 struct got_entry **lgot_ents;
9254 struct got_entry **end_lgot_ents;
9255 struct plt_entry **local_plt;
9256 struct plt_entry **end_local_plt;
9257 unsigned char *lgot_masks;
9258 bfd_size_type locsymcount;
9259 Elf_Internal_Shdr *symtab_hdr;
9261 if (!is_ppc64_elf (ibfd))
9264 for (s = ibfd->sections; s != NULL; s = s->next)
9266 struct ppc_dyn_relocs *p;
9268 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9270 if (!bfd_is_abs_section (p->sec)
9271 && bfd_is_abs_section (p->sec->output_section))
9273 /* Input section has been discarded, either because
9274 it is a copy of a linkonce section or due to
9275 linker script /DISCARD/, so we'll be discarding
9278 else if (p->count != 0)
9280 asection *srel = elf_section_data (p->sec)->sreloc;
9282 srel = htab->reliplt;
9283 srel->size += p->count * sizeof (Elf64_External_Rela);
9284 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9285 info->flags |= DF_TEXTREL;
9290 lgot_ents = elf_local_got_ents (ibfd);
9294 symtab_hdr = &elf_symtab_hdr (ibfd);
9295 locsymcount = symtab_hdr->sh_info;
9296 end_lgot_ents = lgot_ents + locsymcount;
9297 local_plt = (struct plt_entry **) end_lgot_ents;
9298 end_local_plt = local_plt + locsymcount;
9299 lgot_masks = (unsigned char *) end_local_plt;
9300 s = ppc64_elf_tdata (ibfd)->got;
9301 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9303 struct got_entry **pent, *ent;
9306 while ((ent = *pent) != NULL)
9307 if (ent->got.refcount > 0)
9309 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9311 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9316 unsigned int ent_size = 8;
9317 unsigned int rel_size = sizeof (Elf64_External_Rela);
9319 ent->got.offset = s->size;
9320 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9325 s->size += ent_size;
9326 if ((*lgot_masks & PLT_IFUNC) != 0)
9328 htab->reliplt->size += rel_size;
9329 htab->got_reli_size += rel_size;
9331 else if (info->shared)
9333 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9334 srel->size += rel_size;
9343 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9344 for (; local_plt < end_local_plt; ++local_plt)
9346 struct plt_entry *ent;
9348 for (ent = *local_plt; ent != NULL; ent = ent->next)
9349 if (ent->plt.refcount > 0)
9352 ent->plt.offset = s->size;
9353 s->size += PLT_ENTRY_SIZE;
9355 htab->reliplt->size += sizeof (Elf64_External_Rela);
9358 ent->plt.offset = (bfd_vma) -1;
9362 /* Allocate global sym .plt and .got entries, and space for global
9363 sym dynamic relocs. */
9364 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9367 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9369 struct got_entry *ent;
9371 if (!is_ppc64_elf (ibfd))
9374 ent = ppc64_tlsld_got (ibfd);
9375 if (ent->got.refcount > 0)
9377 if (!htab->do_multi_toc && first_tlsld != NULL)
9379 ent->is_indirect = TRUE;
9380 ent->got.ent = first_tlsld;
9384 if (first_tlsld == NULL)
9386 s = ppc64_elf_tdata (ibfd)->got;
9387 ent->got.offset = s->size;
9392 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9393 srel->size += sizeof (Elf64_External_Rela);
9398 ent->got.offset = (bfd_vma) -1;
9401 /* We now have determined the sizes of the various dynamic sections.
9402 Allocate memory for them. */
9404 for (s = dynobj->sections; s != NULL; s = s->next)
9406 if ((s->flags & SEC_LINKER_CREATED) == 0)
9409 if (s == htab->brlt || s == htab->relbrlt)
9410 /* These haven't been allocated yet; don't strip. */
9412 else if (s == htab->got
9416 || s == htab->dynbss)
9418 /* Strip this section if we don't need it; see the
9421 else if (s == htab->glink_eh_frame)
9423 if (!bfd_is_abs_section (s->output_section))
9424 /* Not sized yet. */
9427 else if (CONST_STRNEQ (s->name, ".rela"))
9431 if (s != htab->relplt)
9434 /* We use the reloc_count field as a counter if we need
9435 to copy relocs into the output file. */
9441 /* It's not one of our sections, so don't allocate space. */
9447 /* If we don't need this section, strip it from the
9448 output file. This is mostly to handle .rela.bss and
9449 .rela.plt. We must create both sections in
9450 create_dynamic_sections, because they must be created
9451 before the linker maps input sections to output
9452 sections. The linker does that before
9453 adjust_dynamic_symbol is called, and it is that
9454 function which decides whether anything needs to go
9455 into these sections. */
9456 s->flags |= SEC_EXCLUDE;
9460 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9463 /* Allocate memory for the section contents. We use bfd_zalloc
9464 here in case unused entries are not reclaimed before the
9465 section's contents are written out. This should not happen,
9466 but this way if it does we get a R_PPC64_NONE reloc in .rela
9467 sections instead of garbage.
9468 We also rely on the section contents being zero when writing
9470 s->contents = bfd_zalloc (dynobj, s->size);
9471 if (s->contents == NULL)
9475 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9477 if (!is_ppc64_elf (ibfd))
9480 s = ppc64_elf_tdata (ibfd)->got;
9481 if (s != NULL && s != htab->got)
9484 s->flags |= SEC_EXCLUDE;
9487 s->contents = bfd_zalloc (ibfd, s->size);
9488 if (s->contents == NULL)
9492 s = ppc64_elf_tdata (ibfd)->relgot;
9496 s->flags |= SEC_EXCLUDE;
9499 s->contents = bfd_zalloc (ibfd, s->size);
9500 if (s->contents == NULL)
9508 if (htab->elf.dynamic_sections_created)
9510 /* Add some entries to the .dynamic section. We fill in the
9511 values later, in ppc64_elf_finish_dynamic_sections, but we
9512 must add the entries now so that we get the correct size for
9513 the .dynamic section. The DT_DEBUG entry is filled in by the
9514 dynamic linker and used by the debugger. */
9515 #define add_dynamic_entry(TAG, VAL) \
9516 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9518 if (info->executable)
9520 if (!add_dynamic_entry (DT_DEBUG, 0))
9524 if (htab->plt != NULL && htab->plt->size != 0)
9526 if (!add_dynamic_entry (DT_PLTGOT, 0)
9527 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9528 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9529 || !add_dynamic_entry (DT_JMPREL, 0)
9530 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9536 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9537 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9541 if (!htab->no_tls_get_addr_opt
9542 && htab->tls_get_addr_fd != NULL
9543 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9544 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9549 if (!add_dynamic_entry (DT_RELA, 0)
9550 || !add_dynamic_entry (DT_RELASZ, 0)
9551 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9554 /* If any dynamic relocs apply to a read-only section,
9555 then we need a DT_TEXTREL entry. */
9556 if ((info->flags & DF_TEXTREL) == 0)
9557 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9559 if ((info->flags & DF_TEXTREL) != 0)
9561 if (!add_dynamic_entry (DT_TEXTREL, 0))
9566 #undef add_dynamic_entry
9571 /* Determine the type of stub needed, if any, for a call. */
9573 static inline enum ppc_stub_type
9574 ppc_type_of_stub (asection *input_sec,
9575 const Elf_Internal_Rela *rel,
9576 struct ppc_link_hash_entry **hash,
9577 struct plt_entry **plt_ent,
9578 bfd_vma destination)
9580 struct ppc_link_hash_entry *h = *hash;
9582 bfd_vma branch_offset;
9583 bfd_vma max_branch_offset;
9584 enum elf_ppc64_reloc_type r_type;
9588 struct plt_entry *ent;
9589 struct ppc_link_hash_entry *fdh = h;
9591 && h->oh->is_func_descriptor)
9593 fdh = ppc_follow_link (h->oh);
9597 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9598 if (ent->addend == rel->r_addend
9599 && ent->plt.offset != (bfd_vma) -1)
9602 return ppc_stub_plt_call;
9605 /* Here, we know we don't have a plt entry. If we don't have a
9606 either a defined function descriptor or a defined entry symbol
9607 in a regular object file, then it is pointless trying to make
9608 any other type of stub. */
9609 if (!is_static_defined (&fdh->elf)
9610 && !is_static_defined (&h->elf))
9611 return ppc_stub_none;
9613 else if (elf_local_got_ents (input_sec->owner) != NULL)
9615 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9616 struct plt_entry **local_plt = (struct plt_entry **)
9617 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9618 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9620 if (local_plt[r_symndx] != NULL)
9622 struct plt_entry *ent;
9624 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9625 if (ent->addend == rel->r_addend
9626 && ent->plt.offset != (bfd_vma) -1)
9629 return ppc_stub_plt_call;
9634 /* Determine where the call point is. */
9635 location = (input_sec->output_offset
9636 + input_sec->output_section->vma
9639 branch_offset = destination - location;
9640 r_type = ELF64_R_TYPE (rel->r_info);
9642 /* Determine if a long branch stub is needed. */
9643 max_branch_offset = 1 << 25;
9644 if (r_type != R_PPC64_REL24)
9645 max_branch_offset = 1 << 15;
9647 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9648 /* We need a stub. Figure out whether a long_branch or plt_branch
9650 return ppc_stub_long_branch;
9652 return ppc_stub_none;
9655 /* With power7 weakly ordered memory model, it is possible for ld.so
9656 to update a plt entry in one thread and have another thread see a
9657 stale zero toc entry. To avoid this we need some sort of acquire
9658 barrier in the call stub. One solution is to make the load of the
9659 toc word seem to appear to depend on the load of the function entry
9660 word. Another solution is to test for r2 being zero, and branch to
9661 the appropriate glink entry if so.
9663 . fake dep barrier compare
9664 . ld 11,xxx(2) ld 11,xxx(2)
9666 . xor 11,11,11 ld 2,xxx+8(2)
9667 . add 2,2,11 cmpldi 2,0
9668 . ld 2,xxx+8(2) bnectr+
9669 . bctr b <glink_entry>
9671 The solution involving the compare turns out to be faster, so
9672 that's what we use unless the branch won't reach. */
9674 #define ALWAYS_USE_FAKE_DEP 0
9675 #define ALWAYS_EMIT_R2SAVE 0
9677 #define PPC_LO(v) ((v) & 0xffff)
9678 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9679 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9681 static inline unsigned int
9682 plt_stub_size (struct ppc_link_hash_table *htab,
9683 struct ppc_stub_hash_entry *stub_entry,
9686 unsigned size = PLT_CALL_STUB_SIZE;
9688 if (!(ALWAYS_EMIT_R2SAVE
9689 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9691 if (!htab->plt_static_chain)
9693 if (htab->plt_thread_safe)
9695 if (PPC_HA (off) == 0)
9697 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9699 if (stub_entry->h != NULL
9700 && (stub_entry->h == htab->tls_get_addr_fd
9701 || stub_entry->h == htab->tls_get_addr)
9702 && !htab->no_tls_get_addr_opt)
9707 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9708 then return the padding needed to do so. */
9709 static inline unsigned int
9710 plt_stub_pad (struct ppc_link_hash_table *htab,
9711 struct ppc_stub_hash_entry *stub_entry,
9714 int stub_align = 1 << htab->plt_stub_align;
9715 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9716 bfd_vma stub_off = stub_entry->stub_sec->size;
9718 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9719 > (stub_size & -stub_align))
9720 return stub_align - (stub_off & (stub_align - 1));
9724 /* Build a .plt call stub. */
9726 static inline bfd_byte *
9727 build_plt_stub (struct ppc_link_hash_table *htab,
9728 struct ppc_stub_hash_entry *stub_entry,
9729 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9731 bfd *obfd = htab->stub_bfd;
9732 bfd_boolean plt_static_chain = htab->plt_static_chain;
9733 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9734 bfd_boolean use_fake_dep = plt_thread_safe;
9735 bfd_vma cmp_branch_off = 0;
9737 if (!ALWAYS_USE_FAKE_DEP
9739 && !(stub_entry->h != NULL
9740 && (stub_entry->h == htab->tls_get_addr_fd
9741 || stub_entry->h == htab->tls_get_addr)
9742 && !htab->no_tls_get_addr_opt))
9744 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9745 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9746 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9749 if (pltindex > 32768)
9750 glinkoff += (pltindex - 32768) * 4;
9752 + htab->glink->output_offset
9753 + htab->glink->output_section->vma);
9754 from = (p - stub_entry->stub_sec->contents
9755 + 4 * (ALWAYS_EMIT_R2SAVE
9756 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9757 + 4 * (PPC_HA (offset) != 0)
9758 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9760 + 4 * (plt_static_chain != 0)
9762 + stub_entry->stub_sec->output_offset
9763 + stub_entry->stub_sec->output_section->vma);
9764 cmp_branch_off = to - from;
9765 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9768 if (PPC_HA (offset) != 0)
9772 if (ALWAYS_EMIT_R2SAVE
9773 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9775 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9776 r[1].r_offset = r[0].r_offset + 4;
9777 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9778 r[1].r_addend = r[0].r_addend;
9779 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9781 r[2].r_offset = r[1].r_offset + 4;
9782 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9783 r[2].r_addend = r[0].r_addend;
9787 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9788 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9789 r[2].r_addend = r[0].r_addend + 8;
9790 if (plt_static_chain)
9792 r[3].r_offset = r[2].r_offset + 4;
9793 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9794 r[3].r_addend = r[0].r_addend + 16;
9798 if (ALWAYS_EMIT_R2SAVE
9799 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9800 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9801 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9802 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9803 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9805 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9808 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9811 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9812 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9814 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9815 if (plt_static_chain)
9816 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9822 if (ALWAYS_EMIT_R2SAVE
9823 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9825 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9826 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9828 r[1].r_offset = r[0].r_offset + 4;
9829 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9830 r[1].r_addend = r[0].r_addend;
9834 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9835 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9836 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9837 if (plt_static_chain)
9839 r[2].r_offset = r[1].r_offset + 4;
9840 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9841 r[2].r_addend = r[0].r_addend + 8;
9845 if (ALWAYS_EMIT_R2SAVE
9846 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9847 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9848 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9849 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9851 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9854 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9857 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9858 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9860 if (plt_static_chain)
9861 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9862 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9864 if (plt_thread_safe && !use_fake_dep)
9866 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9867 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9868 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
9871 bfd_put_32 (obfd, BCTR, p), p += 4;
9875 /* Build a special .plt call stub for __tls_get_addr. */
9877 #define LD_R11_0R3 0xe9630000
9878 #define LD_R12_0R3 0xe9830000
9879 #define MR_R0_R3 0x7c601b78
9880 #define CMPDI_R11_0 0x2c2b0000
9881 #define ADD_R3_R12_R13 0x7c6c6a14
9882 #define BEQLR 0x4d820020
9883 #define MR_R3_R0 0x7c030378
9884 #define MFLR_R11 0x7d6802a6
9885 #define STD_R11_0R1 0xf9610000
9886 #define BCTRL 0x4e800421
9887 #define LD_R11_0R1 0xe9610000
9888 #define LD_R2_0R1 0xe8410000
9889 #define MTLR_R11 0x7d6803a6
9891 static inline bfd_byte *
9892 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
9893 struct ppc_stub_hash_entry *stub_entry,
9894 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9896 bfd *obfd = htab->stub_bfd;
9898 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9899 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9900 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9901 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9902 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9903 bfd_put_32 (obfd, BEQLR, p), p += 4;
9904 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9905 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9906 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9909 r[0].r_offset += 9 * 4;
9910 p = build_plt_stub (htab, stub_entry, p, offset, r);
9911 bfd_put_32 (obfd, BCTRL, p - 4);
9913 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9914 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9915 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9916 bfd_put_32 (obfd, BLR, p), p += 4;
9921 static Elf_Internal_Rela *
9922 get_relocs (asection *sec, int count)
9924 Elf_Internal_Rela *relocs;
9925 struct bfd_elf_section_data *elfsec_data;
9927 elfsec_data = elf_section_data (sec);
9928 relocs = elfsec_data->relocs;
9931 bfd_size_type relsize;
9932 relsize = sec->reloc_count * sizeof (*relocs);
9933 relocs = bfd_alloc (sec->owner, relsize);
9936 elfsec_data->relocs = relocs;
9937 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9938 sizeof (Elf_Internal_Shdr));
9939 if (elfsec_data->rela.hdr == NULL)
9941 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9942 * sizeof (Elf64_External_Rela));
9943 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9944 sec->reloc_count = 0;
9946 relocs += sec->reloc_count;
9947 sec->reloc_count += count;
9952 get_r2off (struct bfd_link_info *info,
9953 struct ppc_stub_hash_entry *stub_entry)
9955 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9956 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9960 /* Support linking -R objects. Get the toc pointer from the
9963 asection *opd = stub_entry->h->elf.root.u.def.section;
9964 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9966 if (strcmp (opd->name, ".opd") != 0
9967 || opd->reloc_count != 0)
9969 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
9970 stub_entry->h->elf.root.root.string);
9971 bfd_set_error (bfd_error_bad_value);
9974 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9976 r2off = bfd_get_64 (opd->owner, buf);
9977 r2off -= elf_gp (info->output_bfd);
9979 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9984 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9986 struct ppc_stub_hash_entry *stub_entry;
9987 struct ppc_branch_hash_entry *br_entry;
9988 struct bfd_link_info *info;
9989 struct ppc_link_hash_table *htab;
9994 Elf_Internal_Rela *r;
9997 /* Massage our args to the form they really have. */
9998 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10001 htab = ppc_hash_table (info);
10005 /* Make a note of the offset within the stubs for this entry. */
10006 stub_entry->stub_offset = stub_entry->stub_sec->size;
10007 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10009 htab->stub_count[stub_entry->stub_type - 1] += 1;
10010 switch (stub_entry->stub_type)
10012 case ppc_stub_long_branch:
10013 case ppc_stub_long_branch_r2off:
10014 /* Branches are relative. This is where we are going to. */
10015 off = dest = (stub_entry->target_value
10016 + stub_entry->target_section->output_offset
10017 + stub_entry->target_section->output_section->vma);
10019 /* And this is where we are coming from. */
10020 off -= (stub_entry->stub_offset
10021 + stub_entry->stub_sec->output_offset
10022 + stub_entry->stub_sec->output_section->vma);
10025 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10027 bfd_vma r2off = get_r2off (info, stub_entry);
10031 htab->stub_error = TRUE;
10034 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10037 if (PPC_HA (r2off) != 0)
10040 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10043 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10047 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10049 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10051 info->callbacks->einfo
10052 (_("%P: long branch stub `%s' offset overflow\n"),
10053 stub_entry->root.string);
10054 htab->stub_error = TRUE;
10058 if (info->emitrelocations)
10060 r = get_relocs (stub_entry->stub_sec, 1);
10063 r->r_offset = loc - stub_entry->stub_sec->contents;
10064 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10065 r->r_addend = dest;
10066 if (stub_entry->h != NULL)
10068 struct elf_link_hash_entry **hashes;
10069 unsigned long symndx;
10070 struct ppc_link_hash_entry *h;
10072 hashes = elf_sym_hashes (htab->stub_bfd);
10073 if (hashes == NULL)
10075 bfd_size_type hsize;
10077 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10078 hashes = bfd_zalloc (htab->stub_bfd, hsize);
10079 if (hashes == NULL)
10081 elf_sym_hashes (htab->stub_bfd) = hashes;
10082 htab->stub_globals = 1;
10084 symndx = htab->stub_globals++;
10086 hashes[symndx] = &h->elf;
10087 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10088 if (h->oh != NULL && h->oh->is_func)
10089 h = ppc_follow_link (h->oh);
10090 if (h->elf.root.u.def.section != stub_entry->target_section)
10091 /* H is an opd symbol. The addend must be zero. */
10095 off = (h->elf.root.u.def.value
10096 + h->elf.root.u.def.section->output_offset
10097 + h->elf.root.u.def.section->output_section->vma);
10098 r->r_addend -= off;
10104 case ppc_stub_plt_branch:
10105 case ppc_stub_plt_branch_r2off:
10106 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10107 stub_entry->root.string + 9,
10109 if (br_entry == NULL)
10111 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10112 stub_entry->root.string);
10113 htab->stub_error = TRUE;
10117 dest = (stub_entry->target_value
10118 + stub_entry->target_section->output_offset
10119 + stub_entry->target_section->output_section->vma);
10121 bfd_put_64 (htab->brlt->owner, dest,
10122 htab->brlt->contents + br_entry->offset);
10124 if (br_entry->iter == htab->stub_iteration)
10126 br_entry->iter = 0;
10128 if (htab->relbrlt != NULL)
10130 /* Create a reloc for the branch lookup table entry. */
10131 Elf_Internal_Rela rela;
10134 rela.r_offset = (br_entry->offset
10135 + htab->brlt->output_offset
10136 + htab->brlt->output_section->vma);
10137 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10138 rela.r_addend = dest;
10140 rl = htab->relbrlt->contents;
10141 rl += (htab->relbrlt->reloc_count++
10142 * sizeof (Elf64_External_Rela));
10143 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10145 else if (info->emitrelocations)
10147 r = get_relocs (htab->brlt, 1);
10150 /* brlt, being SEC_LINKER_CREATED does not go through the
10151 normal reloc processing. Symbols and offsets are not
10152 translated from input file to output file form, so
10153 set up the offset per the output file. */
10154 r->r_offset = (br_entry->offset
10155 + htab->brlt->output_offset
10156 + htab->brlt->output_section->vma);
10157 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10158 r->r_addend = dest;
10162 dest = (br_entry->offset
10163 + htab->brlt->output_offset
10164 + htab->brlt->output_section->vma);
10167 - elf_gp (htab->brlt->output_section->owner)
10168 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10170 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10172 info->callbacks->einfo
10173 (_("%P: linkage table error against `%T'\n"),
10174 stub_entry->root.string);
10175 bfd_set_error (bfd_error_bad_value);
10176 htab->stub_error = TRUE;
10180 if (info->emitrelocations)
10182 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10185 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10186 if (bfd_big_endian (info->output_bfd))
10187 r[0].r_offset += 2;
10188 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10189 r[0].r_offset += 4;
10190 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10191 r[0].r_addend = dest;
10192 if (PPC_HA (off) != 0)
10194 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10195 r[1].r_offset = r[0].r_offset + 4;
10196 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10197 r[1].r_addend = r[0].r_addend;
10201 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10203 if (PPC_HA (off) != 0)
10206 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10208 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10213 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10218 bfd_vma r2off = get_r2off (info, stub_entry);
10222 htab->stub_error = TRUE;
10226 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10229 if (PPC_HA (off) != 0)
10232 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10234 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10239 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10243 if (PPC_HA (r2off) != 0)
10246 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10249 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10252 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10254 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10257 case ppc_stub_plt_call:
10258 case ppc_stub_plt_call_r2save:
10259 if (stub_entry->h != NULL
10260 && stub_entry->h->is_func_descriptor
10261 && stub_entry->h->oh != NULL)
10263 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10265 /* If the old-ABI "dot-symbol" is undefined make it weak so
10266 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10267 FIXME: We used to define the symbol on one of the call
10268 stubs instead, which is why we test symbol section id
10269 against htab->top_id in various places. Likely all
10270 these checks could now disappear. */
10271 if (fh->elf.root.type == bfd_link_hash_undefined)
10272 fh->elf.root.type = bfd_link_hash_undefweak;
10273 /* Stop undo_symbol_twiddle changing it back to undefined. */
10274 fh->was_undefined = 0;
10277 /* Now build the stub. */
10278 dest = stub_entry->plt_ent->plt.offset & ~1;
10279 if (dest >= (bfd_vma) -2)
10283 if (!htab->elf.dynamic_sections_created
10284 || stub_entry->h == NULL
10285 || stub_entry->h->elf.dynindx == -1)
10288 dest += plt->output_offset + plt->output_section->vma;
10290 if (stub_entry->h == NULL
10291 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10293 Elf_Internal_Rela rela;
10296 rela.r_offset = dest;
10297 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10298 rela.r_addend = (stub_entry->target_value
10299 + stub_entry->target_section->output_offset
10300 + stub_entry->target_section->output_section->vma);
10302 rl = (htab->reliplt->contents
10303 + (htab->reliplt->reloc_count++
10304 * sizeof (Elf64_External_Rela)));
10305 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10306 stub_entry->plt_ent->plt.offset |= 1;
10310 - elf_gp (plt->output_section->owner)
10311 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10313 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10315 info->callbacks->einfo
10316 (_("%P: linkage table error against `%T'\n"),
10317 stub_entry->h != NULL
10318 ? stub_entry->h->elf.root.root.string
10320 bfd_set_error (bfd_error_bad_value);
10321 htab->stub_error = TRUE;
10325 if (htab->plt_stub_align != 0)
10327 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10329 stub_entry->stub_sec->size += pad;
10330 stub_entry->stub_offset = stub_entry->stub_sec->size;
10335 if (info->emitrelocations)
10337 r = get_relocs (stub_entry->stub_sec,
10339 + (PPC_HA (off) != 0)
10340 + (htab->plt_static_chain
10341 && PPC_HA (off + 16) == PPC_HA (off))));
10344 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10345 if (bfd_big_endian (info->output_bfd))
10346 r[0].r_offset += 2;
10347 r[0].r_addend = dest;
10349 if (stub_entry->h != NULL
10350 && (stub_entry->h == htab->tls_get_addr_fd
10351 || stub_entry->h == htab->tls_get_addr)
10352 && !htab->no_tls_get_addr_opt)
10353 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10355 p = build_plt_stub (htab, stub_entry, loc, off, r);
10364 stub_entry->stub_sec->size += size;
10366 if (htab->emit_stub_syms)
10368 struct elf_link_hash_entry *h;
10371 const char *const stub_str[] = { "long_branch",
10372 "long_branch_r2off",
10374 "plt_branch_r2off",
10378 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10379 len2 = strlen (stub_entry->root.string);
10380 name = bfd_malloc (len1 + len2 + 2);
10383 memcpy (name, stub_entry->root.string, 9);
10384 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10385 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10386 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10389 if (h->root.type == bfd_link_hash_new)
10391 h->root.type = bfd_link_hash_defined;
10392 h->root.u.def.section = stub_entry->stub_sec;
10393 h->root.u.def.value = stub_entry->stub_offset;
10394 h->ref_regular = 1;
10395 h->def_regular = 1;
10396 h->ref_regular_nonweak = 1;
10397 h->forced_local = 1;
10405 /* As above, but don't actually build the stub. Just bump offset so
10406 we know stub section sizes, and select plt_branch stubs where
10407 long_branch stubs won't do. */
10410 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10412 struct ppc_stub_hash_entry *stub_entry;
10413 struct bfd_link_info *info;
10414 struct ppc_link_hash_table *htab;
10418 /* Massage our args to the form they really have. */
10419 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10422 htab = ppc_hash_table (info);
10426 if (stub_entry->stub_type == ppc_stub_plt_call
10427 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10430 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10431 if (off >= (bfd_vma) -2)
10434 if (!htab->elf.dynamic_sections_created
10435 || stub_entry->h == NULL
10436 || stub_entry->h->elf.dynindx == -1)
10438 off += (plt->output_offset
10439 + plt->output_section->vma
10440 - elf_gp (plt->output_section->owner)
10441 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10443 size = plt_stub_size (htab, stub_entry, off);
10444 if (htab->plt_stub_align)
10445 size += plt_stub_pad (htab, stub_entry, off);
10446 if (info->emitrelocations)
10448 stub_entry->stub_sec->reloc_count
10450 + (PPC_HA (off) != 0)
10451 + (htab->plt_static_chain
10452 && PPC_HA (off + 16) == PPC_HA (off)));
10453 stub_entry->stub_sec->flags |= SEC_RELOC;
10458 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10462 off = (stub_entry->target_value
10463 + stub_entry->target_section->output_offset
10464 + stub_entry->target_section->output_section->vma);
10465 off -= (stub_entry->stub_sec->size
10466 + stub_entry->stub_sec->output_offset
10467 + stub_entry->stub_sec->output_section->vma);
10469 /* Reset the stub type from the plt variant in case we now
10470 can reach with a shorter stub. */
10471 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10472 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10475 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10477 r2off = get_r2off (info, stub_entry);
10480 htab->stub_error = TRUE;
10484 if (PPC_HA (r2off) != 0)
10489 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10490 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10492 struct ppc_branch_hash_entry *br_entry;
10494 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10495 stub_entry->root.string + 9,
10497 if (br_entry == NULL)
10499 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10500 stub_entry->root.string);
10501 htab->stub_error = TRUE;
10505 if (br_entry->iter != htab->stub_iteration)
10507 br_entry->iter = htab->stub_iteration;
10508 br_entry->offset = htab->brlt->size;
10509 htab->brlt->size += 8;
10511 if (htab->relbrlt != NULL)
10512 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10513 else if (info->emitrelocations)
10515 htab->brlt->reloc_count += 1;
10516 htab->brlt->flags |= SEC_RELOC;
10520 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10521 off = (br_entry->offset
10522 + htab->brlt->output_offset
10523 + htab->brlt->output_section->vma
10524 - elf_gp (htab->brlt->output_section->owner)
10525 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10527 if (info->emitrelocations)
10529 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10530 stub_entry->stub_sec->flags |= SEC_RELOC;
10533 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10536 if (PPC_HA (off) != 0)
10542 if (PPC_HA (off) != 0)
10545 if (PPC_HA (r2off) != 0)
10549 else if (info->emitrelocations)
10551 stub_entry->stub_sec->reloc_count += 1;
10552 stub_entry->stub_sec->flags |= SEC_RELOC;
10556 stub_entry->stub_sec->size += size;
10560 /* Set up various things so that we can make a list of input sections
10561 for each output section included in the link. Returns -1 on error,
10562 0 when no stubs will be needed, and 1 on success. */
10565 ppc64_elf_setup_section_lists
10566 (struct bfd_link_info *info,
10567 asection *(*add_stub_section) (const char *, asection *),
10568 void (*layout_sections_again) (void))
10571 int top_id, top_index, id;
10573 asection **input_list;
10575 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10579 /* Stash our params away. */
10580 htab->add_stub_section = add_stub_section;
10581 htab->layout_sections_again = layout_sections_again;
10583 /* Find the top input section id. */
10584 for (input_bfd = info->input_bfds, top_id = 3;
10586 input_bfd = input_bfd->link_next)
10588 for (section = input_bfd->sections;
10590 section = section->next)
10592 if (top_id < section->id)
10593 top_id = section->id;
10597 htab->top_id = top_id;
10598 amt = sizeof (struct map_stub) * (top_id + 1);
10599 htab->stub_group = bfd_zmalloc (amt);
10600 if (htab->stub_group == NULL)
10603 /* Set toc_off for com, und, abs and ind sections. */
10604 for (id = 0; id < 3; id++)
10605 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10607 /* We can't use output_bfd->section_count here to find the top output
10608 section index as some sections may have been removed, and
10609 strip_excluded_output_sections doesn't renumber the indices. */
10610 for (section = info->output_bfd->sections, top_index = 0;
10612 section = section->next)
10614 if (top_index < section->index)
10615 top_index = section->index;
10618 htab->top_index = top_index;
10619 amt = sizeof (asection *) * (top_index + 1);
10620 input_list = bfd_zmalloc (amt);
10621 htab->input_list = input_list;
10622 if (input_list == NULL)
10628 /* Set up for first pass at multitoc partitioning. */
10631 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10633 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10635 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
10636 htab->toc_bfd = NULL;
10637 htab->toc_first_sec = NULL;
10640 /* The linker repeatedly calls this function for each TOC input section
10641 and linker generated GOT section. Group input bfds such that the toc
10642 within a group is less than 64k in size. */
10645 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10647 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10648 bfd_vma addr, off, limit;
10653 if (!htab->second_toc_pass)
10655 /* Keep track of the first .toc or .got section for this input bfd. */
10656 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
10660 htab->toc_bfd = isec->owner;
10661 htab->toc_first_sec = isec;
10664 addr = isec->output_offset + isec->output_section->vma;
10665 off = addr - htab->toc_curr;
10666 limit = 0x80008000;
10667 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10669 if (off + isec->size > limit)
10671 addr = (htab->toc_first_sec->output_offset
10672 + htab->toc_first_sec->output_section->vma);
10673 htab->toc_curr = addr;
10676 /* toc_curr is the base address of this toc group. Set elf_gp
10677 for the input section to be the offset relative to the
10678 output toc base plus 0x8000. Making the input elf_gp an
10679 offset allows us to move the toc as a whole without
10680 recalculating input elf_gp. */
10681 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10682 off += TOC_BASE_OFF;
10684 /* Die if someone uses a linker script that doesn't keep input
10685 file .toc and .got together. */
10687 && elf_gp (isec->owner) != 0
10688 && elf_gp (isec->owner) != off)
10691 elf_gp (isec->owner) = off;
10695 /* During the second pass toc_first_sec points to the start of
10696 a toc group, and toc_curr is used to track the old elf_gp.
10697 We use toc_bfd to ensure we only look at each bfd once. */
10698 if (htab->toc_bfd == isec->owner)
10700 htab->toc_bfd = isec->owner;
10702 if (htab->toc_first_sec == NULL
10703 || htab->toc_curr != elf_gp (isec->owner))
10705 htab->toc_curr = elf_gp (isec->owner);
10706 htab->toc_first_sec = isec;
10708 addr = (htab->toc_first_sec->output_offset
10709 + htab->toc_first_sec->output_section->vma);
10710 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10711 elf_gp (isec->owner) = off;
10716 /* Called via elf_link_hash_traverse to merge GOT entries for global
10720 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10722 if (h->root.type == bfd_link_hash_indirect)
10725 merge_got_entries (&h->got.glist);
10730 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10734 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10736 struct got_entry *gent;
10738 if (h->root.type == bfd_link_hash_indirect)
10741 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10742 if (!gent->is_indirect)
10743 allocate_got (h, (struct bfd_link_info *) inf, gent);
10747 /* Called on the first multitoc pass after the last call to
10748 ppc64_elf_next_toc_section. This function removes duplicate GOT
10752 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10754 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10755 struct bfd *ibfd, *ibfd2;
10756 bfd_boolean done_something;
10758 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10760 if (!htab->do_multi_toc)
10763 /* Merge global sym got entries within a toc group. */
10764 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10766 /* And tlsld_got. */
10767 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10769 struct got_entry *ent, *ent2;
10771 if (!is_ppc64_elf (ibfd))
10774 ent = ppc64_tlsld_got (ibfd);
10775 if (!ent->is_indirect
10776 && ent->got.offset != (bfd_vma) -1)
10778 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10780 if (!is_ppc64_elf (ibfd2))
10783 ent2 = ppc64_tlsld_got (ibfd2);
10784 if (!ent2->is_indirect
10785 && ent2->got.offset != (bfd_vma) -1
10786 && elf_gp (ibfd2) == elf_gp (ibfd))
10788 ent2->is_indirect = TRUE;
10789 ent2->got.ent = ent;
10795 /* Zap sizes of got sections. */
10796 htab->reliplt->rawsize = htab->reliplt->size;
10797 htab->reliplt->size -= htab->got_reli_size;
10798 htab->got_reli_size = 0;
10800 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10802 asection *got, *relgot;
10804 if (!is_ppc64_elf (ibfd))
10807 got = ppc64_elf_tdata (ibfd)->got;
10810 got->rawsize = got->size;
10812 relgot = ppc64_elf_tdata (ibfd)->relgot;
10813 relgot->rawsize = relgot->size;
10818 /* Now reallocate the got, local syms first. We don't need to
10819 allocate section contents again since we never increase size. */
10820 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10822 struct got_entry **lgot_ents;
10823 struct got_entry **end_lgot_ents;
10824 struct plt_entry **local_plt;
10825 struct plt_entry **end_local_plt;
10826 unsigned char *lgot_masks;
10827 bfd_size_type locsymcount;
10828 Elf_Internal_Shdr *symtab_hdr;
10831 if (!is_ppc64_elf (ibfd))
10834 lgot_ents = elf_local_got_ents (ibfd);
10838 symtab_hdr = &elf_symtab_hdr (ibfd);
10839 locsymcount = symtab_hdr->sh_info;
10840 end_lgot_ents = lgot_ents + locsymcount;
10841 local_plt = (struct plt_entry **) end_lgot_ents;
10842 end_local_plt = local_plt + locsymcount;
10843 lgot_masks = (unsigned char *) end_local_plt;
10844 s = ppc64_elf_tdata (ibfd)->got;
10845 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10847 struct got_entry *ent;
10849 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10851 unsigned int ent_size = 8;
10852 unsigned int rel_size = sizeof (Elf64_External_Rela);
10854 ent->got.offset = s->size;
10855 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10860 s->size += ent_size;
10861 if ((*lgot_masks & PLT_IFUNC) != 0)
10863 htab->reliplt->size += rel_size;
10864 htab->got_reli_size += rel_size;
10866 else if (info->shared)
10868 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10869 srel->size += rel_size;
10875 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10877 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10879 struct got_entry *ent;
10881 if (!is_ppc64_elf (ibfd))
10884 ent = ppc64_tlsld_got (ibfd);
10885 if (!ent->is_indirect
10886 && ent->got.offset != (bfd_vma) -1)
10888 asection *s = ppc64_elf_tdata (ibfd)->got;
10889 ent->got.offset = s->size;
10893 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10894 srel->size += sizeof (Elf64_External_Rela);
10899 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10900 if (!done_something)
10901 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10905 if (!is_ppc64_elf (ibfd))
10908 got = ppc64_elf_tdata (ibfd)->got;
10911 done_something = got->rawsize != got->size;
10912 if (done_something)
10917 if (done_something)
10918 (*htab->layout_sections_again) ();
10920 /* Set up for second pass over toc sections to recalculate elf_gp
10921 on input sections. */
10922 htab->toc_bfd = NULL;
10923 htab->toc_first_sec = NULL;
10924 htab->second_toc_pass = TRUE;
10925 return done_something;
10928 /* Called after second pass of multitoc partitioning. */
10931 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10933 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10935 /* After the second pass, toc_curr tracks the TOC offset used
10936 for code sections below in ppc64_elf_next_input_section. */
10937 htab->toc_curr = TOC_BASE_OFF;
10940 /* No toc references were found in ISEC. If the code in ISEC makes no
10941 calls, then there's no need to use toc adjusting stubs when branching
10942 into ISEC. Actually, indirect calls from ISEC are OK as they will
10943 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10944 needed, and 2 if a cyclical call-graph was found but no other reason
10945 for a stub was detected. If called from the top level, a return of
10946 2 means the same as a return of 0. */
10949 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10953 /* Mark this section as checked. */
10954 isec->call_check_done = 1;
10956 /* We know none of our code bearing sections will need toc stubs. */
10957 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10960 if (isec->size == 0)
10963 if (isec->output_section == NULL)
10967 if (isec->reloc_count != 0)
10969 Elf_Internal_Rela *relstart, *rel;
10970 Elf_Internal_Sym *local_syms;
10971 struct ppc_link_hash_table *htab;
10973 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10974 info->keep_memory);
10975 if (relstart == NULL)
10978 /* Look for branches to outside of this section. */
10980 htab = ppc_hash_table (info);
10984 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10986 enum elf_ppc64_reloc_type r_type;
10987 unsigned long r_symndx;
10988 struct elf_link_hash_entry *h;
10989 struct ppc_link_hash_entry *eh;
10990 Elf_Internal_Sym *sym;
10992 struct _opd_sec_data *opd;
10996 r_type = ELF64_R_TYPE (rel->r_info);
10997 if (r_type != R_PPC64_REL24
10998 && r_type != R_PPC64_REL14
10999 && r_type != R_PPC64_REL14_BRTAKEN
11000 && r_type != R_PPC64_REL14_BRNTAKEN)
11003 r_symndx = ELF64_R_SYM (rel->r_info);
11004 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11011 /* Calls to dynamic lib functions go through a plt call stub
11013 eh = (struct ppc_link_hash_entry *) h;
11015 && (eh->elf.plt.plist != NULL
11017 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11023 if (sym_sec == NULL)
11024 /* Ignore other undefined symbols. */
11027 /* Assume branches to other sections not included in the
11028 link need stubs too, to cover -R and absolute syms. */
11029 if (sym_sec->output_section == NULL)
11036 sym_value = sym->st_value;
11039 if (h->root.type != bfd_link_hash_defined
11040 && h->root.type != bfd_link_hash_defweak)
11042 sym_value = h->root.u.def.value;
11044 sym_value += rel->r_addend;
11046 /* If this branch reloc uses an opd sym, find the code section. */
11047 opd = get_opd_info (sym_sec);
11050 if (h == NULL && opd->adjust != NULL)
11054 adjust = opd->adjust[sym->st_value / 8];
11056 /* Assume deleted functions won't ever be called. */
11058 sym_value += adjust;
11061 dest = opd_entry_value (sym_sec, sym_value,
11062 &sym_sec, NULL, FALSE);
11063 if (dest == (bfd_vma) -1)
11068 + sym_sec->output_offset
11069 + sym_sec->output_section->vma);
11071 /* Ignore branch to self. */
11072 if (sym_sec == isec)
11075 /* If the called function uses the toc, we need a stub. */
11076 if (sym_sec->has_toc_reloc
11077 || sym_sec->makes_toc_func_call)
11083 /* Assume any branch that needs a long branch stub might in fact
11084 need a plt_branch stub. A plt_branch stub uses r2. */
11085 else if (dest - (isec->output_offset
11086 + isec->output_section->vma
11087 + rel->r_offset) + (1 << 25) >= (2 << 25))
11093 /* If calling back to a section in the process of being
11094 tested, we can't say for sure that no toc adjusting stubs
11095 are needed, so don't return zero. */
11096 else if (sym_sec->call_check_in_progress)
11099 /* Branches to another section that itself doesn't have any TOC
11100 references are OK. Recursively call ourselves to check. */
11101 else if (!sym_sec->call_check_done)
11105 /* Mark current section as indeterminate, so that other
11106 sections that call back to current won't be marked as
11108 isec->call_check_in_progress = 1;
11109 recur = toc_adjusting_stub_needed (info, sym_sec);
11110 isec->call_check_in_progress = 0;
11121 if (local_syms != NULL
11122 && (elf_symtab_hdr (isec->owner).contents
11123 != (unsigned char *) local_syms))
11125 if (elf_section_data (isec)->relocs != relstart)
11130 && isec->map_head.s != NULL
11131 && (strcmp (isec->output_section->name, ".init") == 0
11132 || strcmp (isec->output_section->name, ".fini") == 0))
11134 if (isec->map_head.s->has_toc_reloc
11135 || isec->map_head.s->makes_toc_func_call)
11137 else if (!isec->map_head.s->call_check_done)
11140 isec->call_check_in_progress = 1;
11141 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11142 isec->call_check_in_progress = 0;
11149 isec->makes_toc_func_call = 1;
11154 /* The linker repeatedly calls this function for each input section,
11155 in the order that input sections are linked into output sections.
11156 Build lists of input sections to determine groupings between which
11157 we may insert linker stubs. */
11160 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11162 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11167 if ((isec->output_section->flags & SEC_CODE) != 0
11168 && isec->output_section->index <= htab->top_index)
11170 asection **list = htab->input_list + isec->output_section->index;
11171 /* Steal the link_sec pointer for our list. */
11172 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11173 /* This happens to make the list in reverse order,
11174 which is what we want. */
11175 PREV_SEC (isec) = *list;
11179 if (htab->multi_toc_needed)
11181 /* If a code section has a function that uses the TOC then we need
11182 to use the right TOC (obviously). Also, make sure that .opd gets
11183 the correct TOC value for R_PPC64_TOC relocs that don't have or
11184 can't find their function symbol (shouldn't ever happen now).
11185 Also specially treat .fixup for the linux kernel. .fixup
11186 contains branches, but only back to the function that hit an
11188 if (isec->has_toc_reloc
11189 || (isec->flags & SEC_CODE) == 0
11190 || strcmp (isec->name, ".fixup") == 0)
11192 if (elf_gp (isec->owner) != 0)
11193 htab->toc_curr = elf_gp (isec->owner);
11197 if (!isec->call_check_done
11198 && toc_adjusting_stub_needed (info, isec) < 0)
11200 /* If we make a local call from this section, ie. a branch
11201 without a following nop, then we have no place to put a
11202 toc restoring insn. We must use the same toc group as
11204 Testing makes_toc_func_call actually tests for *any*
11205 calls to functions that need a good toc pointer. A more
11206 precise test would be better, as this one will set
11207 incorrect values for pasted .init/.fini fragments.
11208 (Fixed later in check_pasted_section.) */
11209 if (isec->makes_toc_func_call
11210 && elf_gp (isec->owner) != 0)
11211 htab->toc_curr = elf_gp (isec->owner);
11215 /* Functions that don't use the TOC can belong in any TOC group.
11216 Use the last TOC base. */
11217 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11221 /* Check that all .init and .fini sections use the same toc, if they
11222 have toc relocs. */
11225 check_pasted_section (struct bfd_link_info *info, const char *name)
11227 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11231 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11232 bfd_vma toc_off = 0;
11235 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11236 if (i->has_toc_reloc)
11239 toc_off = htab->stub_group[i->id].toc_off;
11240 else if (toc_off != htab->stub_group[i->id].toc_off)
11245 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11246 if (i->makes_toc_func_call)
11248 toc_off = htab->stub_group[i->id].toc_off;
11252 /* Make sure the whole pasted function uses the same toc offset. */
11254 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11255 htab->stub_group[i->id].toc_off = toc_off;
11261 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11263 return (check_pasted_section (info, ".init")
11264 & check_pasted_section (info, ".fini"));
11267 /* See whether we can group stub sections together. Grouping stub
11268 sections may result in fewer stubs. More importantly, we need to
11269 put all .init* and .fini* stubs at the beginning of the .init or
11270 .fini output sections respectively, because glibc splits the
11271 _init and _fini functions into multiple parts. Putting a stub in
11272 the middle of a function is not a good idea. */
11275 group_sections (struct ppc_link_hash_table *htab,
11276 bfd_size_type stub_group_size,
11277 bfd_boolean stubs_always_before_branch)
11280 bfd_size_type stub14_group_size;
11281 bfd_boolean suppress_size_errors;
11283 suppress_size_errors = FALSE;
11284 stub14_group_size = stub_group_size;
11285 if (stub_group_size == 1)
11287 /* Default values. */
11288 if (stubs_always_before_branch)
11290 stub_group_size = 0x1e00000;
11291 stub14_group_size = 0x7800;
11295 stub_group_size = 0x1c00000;
11296 stub14_group_size = 0x7000;
11298 suppress_size_errors = TRUE;
11301 list = htab->input_list + htab->top_index;
11304 asection *tail = *list;
11305 while (tail != NULL)
11309 bfd_size_type total;
11310 bfd_boolean big_sec;
11314 total = tail->size;
11315 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11316 && ppc64_elf_section_data (tail)->has_14bit_branch
11317 ? stub14_group_size : stub_group_size);
11318 if (big_sec && !suppress_size_errors)
11319 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11320 tail->owner, tail);
11321 curr_toc = htab->stub_group[tail->id].toc_off;
11323 while ((prev = PREV_SEC (curr)) != NULL
11324 && ((total += curr->output_offset - prev->output_offset)
11325 < (ppc64_elf_section_data (prev) != NULL
11326 && ppc64_elf_section_data (prev)->has_14bit_branch
11327 ? stub14_group_size : stub_group_size))
11328 && htab->stub_group[prev->id].toc_off == curr_toc)
11331 /* OK, the size from the start of CURR to the end is less
11332 than stub_group_size and thus can be handled by one stub
11333 section. (or the tail section is itself larger than
11334 stub_group_size, in which case we may be toast.) We
11335 should really be keeping track of the total size of stubs
11336 added here, as stubs contribute to the final output
11337 section size. That's a little tricky, and this way will
11338 only break if stubs added make the total size more than
11339 2^25, ie. for the default stub_group_size, if stubs total
11340 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11343 prev = PREV_SEC (tail);
11344 /* Set up this stub group. */
11345 htab->stub_group[tail->id].link_sec = curr;
11347 while (tail != curr && (tail = prev) != NULL);
11349 /* But wait, there's more! Input sections up to stub_group_size
11350 bytes before the stub section can be handled by it too.
11351 Don't do this if we have a really large section after the
11352 stubs, as adding more stubs increases the chance that
11353 branches may not reach into the stub section. */
11354 if (!stubs_always_before_branch && !big_sec)
11357 while (prev != NULL
11358 && ((total += tail->output_offset - prev->output_offset)
11359 < (ppc64_elf_section_data (prev) != NULL
11360 && ppc64_elf_section_data (prev)->has_14bit_branch
11361 ? stub14_group_size : stub_group_size))
11362 && htab->stub_group[prev->id].toc_off == curr_toc)
11365 prev = PREV_SEC (tail);
11366 htab->stub_group[tail->id].link_sec = curr;
11372 while (list-- != htab->input_list);
11373 free (htab->input_list);
11377 static const unsigned char glink_eh_frame_cie[] =
11379 0, 0, 0, 16, /* length. */
11380 0, 0, 0, 0, /* id. */
11381 1, /* CIE version. */
11382 'z', 'R', 0, /* Augmentation string. */
11383 4, /* Code alignment. */
11384 0x78, /* Data alignment. */
11386 1, /* Augmentation size. */
11387 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11388 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11391 /* Stripping output sections is normally done before dynamic section
11392 symbols have been allocated. This function is called later, and
11393 handles cases like htab->brlt which is mapped to its own output
11397 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11399 if (isec->size == 0
11400 && isec->output_section->size == 0
11401 && !(isec->output_section->flags & SEC_KEEP)
11402 && !bfd_section_removed_from_list (info->output_bfd,
11403 isec->output_section)
11404 && elf_section_data (isec->output_section)->dynindx == 0)
11406 isec->output_section->flags |= SEC_EXCLUDE;
11407 bfd_section_list_remove (info->output_bfd, isec->output_section);
11408 info->output_bfd->section_count--;
11412 /* Determine and set the size of the stub section for a final link.
11414 The basic idea here is to examine all the relocations looking for
11415 PC-relative calls to a target that is unreachable with a "bl"
11419 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11420 bfd_boolean plt_static_chain, int plt_thread_safe,
11421 int plt_stub_align)
11423 bfd_size_type stub_group_size;
11424 bfd_boolean stubs_always_before_branch;
11425 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11430 htab->plt_static_chain = plt_static_chain;
11431 htab->plt_stub_align = plt_stub_align;
11432 if (plt_thread_safe == -1 && !info->executable)
11433 plt_thread_safe = 1;
11434 if (plt_thread_safe == -1)
11436 static const char *const thread_starter[] =
11440 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11442 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11443 "mq_notify", "create_timer",
11447 "GOMP_parallel_start",
11448 "GOMP_parallel_loop_static_start",
11449 "GOMP_parallel_loop_dynamic_start",
11450 "GOMP_parallel_loop_guided_start",
11451 "GOMP_parallel_loop_runtime_start",
11452 "GOMP_parallel_sections_start",
11456 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11458 struct elf_link_hash_entry *h;
11459 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11460 FALSE, FALSE, TRUE);
11461 plt_thread_safe = h != NULL && h->ref_regular;
11462 if (plt_thread_safe)
11466 htab->plt_thread_safe = plt_thread_safe;
11467 stubs_always_before_branch = group_size < 0;
11468 if (group_size < 0)
11469 stub_group_size = -group_size;
11471 stub_group_size = group_size;
11473 group_sections (htab, stub_group_size, stubs_always_before_branch);
11478 unsigned int bfd_indx;
11479 asection *stub_sec;
11481 htab->stub_iteration += 1;
11483 for (input_bfd = info->input_bfds, bfd_indx = 0;
11485 input_bfd = input_bfd->link_next, bfd_indx++)
11487 Elf_Internal_Shdr *symtab_hdr;
11489 Elf_Internal_Sym *local_syms = NULL;
11491 if (!is_ppc64_elf (input_bfd))
11494 /* We'll need the symbol table in a second. */
11495 symtab_hdr = &elf_symtab_hdr (input_bfd);
11496 if (symtab_hdr->sh_info == 0)
11499 /* Walk over each section attached to the input bfd. */
11500 for (section = input_bfd->sections;
11502 section = section->next)
11504 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11506 /* If there aren't any relocs, then there's nothing more
11508 if ((section->flags & SEC_RELOC) == 0
11509 || (section->flags & SEC_ALLOC) == 0
11510 || (section->flags & SEC_LOAD) == 0
11511 || (section->flags & SEC_CODE) == 0
11512 || section->reloc_count == 0)
11515 /* If this section is a link-once section that will be
11516 discarded, then don't create any stubs. */
11517 if (section->output_section == NULL
11518 || section->output_section->owner != info->output_bfd)
11521 /* Get the relocs. */
11523 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11524 info->keep_memory);
11525 if (internal_relocs == NULL)
11526 goto error_ret_free_local;
11528 /* Now examine each relocation. */
11529 irela = internal_relocs;
11530 irelaend = irela + section->reloc_count;
11531 for (; irela < irelaend; irela++)
11533 enum elf_ppc64_reloc_type r_type;
11534 unsigned int r_indx;
11535 enum ppc_stub_type stub_type;
11536 struct ppc_stub_hash_entry *stub_entry;
11537 asection *sym_sec, *code_sec;
11538 bfd_vma sym_value, code_value;
11539 bfd_vma destination;
11540 bfd_boolean ok_dest;
11541 struct ppc_link_hash_entry *hash;
11542 struct ppc_link_hash_entry *fdh;
11543 struct elf_link_hash_entry *h;
11544 Elf_Internal_Sym *sym;
11546 const asection *id_sec;
11547 struct _opd_sec_data *opd;
11548 struct plt_entry *plt_ent;
11550 r_type = ELF64_R_TYPE (irela->r_info);
11551 r_indx = ELF64_R_SYM (irela->r_info);
11553 if (r_type >= R_PPC64_max)
11555 bfd_set_error (bfd_error_bad_value);
11556 goto error_ret_free_internal;
11559 /* Only look for stubs on branch instructions. */
11560 if (r_type != R_PPC64_REL24
11561 && r_type != R_PPC64_REL14
11562 && r_type != R_PPC64_REL14_BRTAKEN
11563 && r_type != R_PPC64_REL14_BRNTAKEN)
11566 /* Now determine the call target, its name, value,
11568 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11569 r_indx, input_bfd))
11570 goto error_ret_free_internal;
11571 hash = (struct ppc_link_hash_entry *) h;
11578 sym_value = sym->st_value;
11581 else if (hash->elf.root.type == bfd_link_hash_defined
11582 || hash->elf.root.type == bfd_link_hash_defweak)
11584 sym_value = hash->elf.root.u.def.value;
11585 if (sym_sec->output_section != NULL)
11588 else if (hash->elf.root.type == bfd_link_hash_undefweak
11589 || hash->elf.root.type == bfd_link_hash_undefined)
11591 /* Recognise an old ABI func code entry sym, and
11592 use the func descriptor sym instead if it is
11594 if (hash->elf.root.root.string[0] == '.'
11595 && (fdh = lookup_fdh (hash, htab)) != NULL)
11597 if (fdh->elf.root.type == bfd_link_hash_defined
11598 || fdh->elf.root.type == bfd_link_hash_defweak)
11600 sym_sec = fdh->elf.root.u.def.section;
11601 sym_value = fdh->elf.root.u.def.value;
11602 if (sym_sec->output_section != NULL)
11611 bfd_set_error (bfd_error_bad_value);
11612 goto error_ret_free_internal;
11618 sym_value += irela->r_addend;
11619 destination = (sym_value
11620 + sym_sec->output_offset
11621 + sym_sec->output_section->vma);
11624 code_sec = sym_sec;
11625 code_value = sym_value;
11626 opd = get_opd_info (sym_sec);
11631 if (hash == NULL && opd->adjust != NULL)
11633 long adjust = opd->adjust[sym_value / 8];
11636 code_value += adjust;
11637 sym_value += adjust;
11639 dest = opd_entry_value (sym_sec, sym_value,
11640 &code_sec, &code_value, FALSE);
11641 if (dest != (bfd_vma) -1)
11643 destination = dest;
11646 /* Fixup old ABI sym to point at code
11648 hash->elf.root.type = bfd_link_hash_defweak;
11649 hash->elf.root.u.def.section = code_sec;
11650 hash->elf.root.u.def.value = code_value;
11655 /* Determine what (if any) linker stub is needed. */
11657 stub_type = ppc_type_of_stub (section, irela, &hash,
11658 &plt_ent, destination);
11660 if (stub_type != ppc_stub_plt_call)
11662 /* Check whether we need a TOC adjusting stub.
11663 Since the linker pastes together pieces from
11664 different object files when creating the
11665 _init and _fini functions, it may be that a
11666 call to what looks like a local sym is in
11667 fact a call needing a TOC adjustment. */
11668 if (code_sec != NULL
11669 && code_sec->output_section != NULL
11670 && (htab->stub_group[code_sec->id].toc_off
11671 != htab->stub_group[section->id].toc_off)
11672 && (code_sec->has_toc_reloc
11673 || code_sec->makes_toc_func_call))
11674 stub_type = ppc_stub_long_branch_r2off;
11677 if (stub_type == ppc_stub_none)
11680 /* __tls_get_addr calls might be eliminated. */
11681 if (stub_type != ppc_stub_plt_call
11683 && (hash == htab->tls_get_addr
11684 || hash == htab->tls_get_addr_fd)
11685 && section->has_tls_reloc
11686 && irela != internal_relocs)
11688 /* Get tls info. */
11689 unsigned char *tls_mask;
11691 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11692 irela - 1, input_bfd))
11693 goto error_ret_free_internal;
11694 if (*tls_mask != 0)
11698 if (stub_type == ppc_stub_plt_call
11699 && irela + 1 < irelaend
11700 && irela[1].r_offset == irela->r_offset + 4
11701 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11703 if (!tocsave_find (htab, INSERT,
11704 &local_syms, irela + 1, input_bfd))
11705 goto error_ret_free_internal;
11707 else if (stub_type == ppc_stub_plt_call)
11708 stub_type = ppc_stub_plt_call_r2save;
11710 /* Support for grouping stub sections. */
11711 id_sec = htab->stub_group[section->id].link_sec;
11713 /* Get the name of this stub. */
11714 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11716 goto error_ret_free_internal;
11718 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11719 stub_name, FALSE, FALSE);
11720 if (stub_entry != NULL)
11722 /* The proper stub has already been created. */
11724 if (stub_type == ppc_stub_plt_call_r2save)
11725 stub_entry->stub_type = stub_type;
11729 stub_entry = ppc_add_stub (stub_name, section, info);
11730 if (stub_entry == NULL)
11733 error_ret_free_internal:
11734 if (elf_section_data (section)->relocs == NULL)
11735 free (internal_relocs);
11736 error_ret_free_local:
11737 if (local_syms != NULL
11738 && (symtab_hdr->contents
11739 != (unsigned char *) local_syms))
11744 stub_entry->stub_type = stub_type;
11745 if (stub_type != ppc_stub_plt_call
11746 && stub_type != ppc_stub_plt_call_r2save)
11748 stub_entry->target_value = code_value;
11749 stub_entry->target_section = code_sec;
11753 stub_entry->target_value = sym_value;
11754 stub_entry->target_section = sym_sec;
11756 stub_entry->h = hash;
11757 stub_entry->plt_ent = plt_ent;
11759 if (stub_entry->h != NULL)
11760 htab->stub_globals += 1;
11763 /* We're done with the internal relocs, free them. */
11764 if (elf_section_data (section)->relocs != internal_relocs)
11765 free (internal_relocs);
11768 if (local_syms != NULL
11769 && symtab_hdr->contents != (unsigned char *) local_syms)
11771 if (!info->keep_memory)
11774 symtab_hdr->contents = (unsigned char *) local_syms;
11778 /* We may have added some stubs. Find out the new size of the
11780 for (stub_sec = htab->stub_bfd->sections;
11782 stub_sec = stub_sec->next)
11783 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11785 stub_sec->rawsize = stub_sec->size;
11786 stub_sec->size = 0;
11787 stub_sec->reloc_count = 0;
11788 stub_sec->flags &= ~SEC_RELOC;
11791 htab->brlt->size = 0;
11792 htab->brlt->reloc_count = 0;
11793 htab->brlt->flags &= ~SEC_RELOC;
11794 if (htab->relbrlt != NULL)
11795 htab->relbrlt->size = 0;
11797 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11799 if (info->emitrelocations
11800 && htab->glink != NULL && htab->glink->size != 0)
11802 htab->glink->reloc_count = 1;
11803 htab->glink->flags |= SEC_RELOC;
11806 if (htab->glink_eh_frame != NULL
11807 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11808 && htab->glink_eh_frame->output_section->size != 0)
11810 size_t size = 0, align;
11812 for (stub_sec = htab->stub_bfd->sections;
11814 stub_sec = stub_sec->next)
11815 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11817 if (htab->glink != NULL && htab->glink->size != 0)
11820 size += sizeof (glink_eh_frame_cie);
11822 align <<= htab->glink_eh_frame->output_section->alignment_power;
11824 size = (size + align) & ~align;
11825 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11826 htab->glink_eh_frame->size = size;
11829 if (htab->plt_stub_align != 0)
11830 for (stub_sec = htab->stub_bfd->sections;
11832 stub_sec = stub_sec->next)
11833 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11834 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11835 & (-1 << htab->plt_stub_align));
11837 for (stub_sec = htab->stub_bfd->sections;
11839 stub_sec = stub_sec->next)
11840 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11841 && stub_sec->rawsize != stub_sec->size)
11844 /* Exit from this loop when no stubs have been added, and no stubs
11845 have changed size. */
11846 if (stub_sec == NULL
11847 && (htab->glink_eh_frame == NULL
11848 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11851 /* Ask the linker to do its stuff. */
11852 (*htab->layout_sections_again) ();
11855 maybe_strip_output (info, htab->brlt);
11856 if (htab->glink_eh_frame != NULL)
11857 maybe_strip_output (info, htab->glink_eh_frame);
11862 /* Called after we have determined section placement. If sections
11863 move, we'll be called again. Provide a value for TOCstart. */
11866 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
11871 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11872 order. The TOC starts where the first of these sections starts. */
11873 s = bfd_get_section_by_name (obfd, ".got");
11874 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11875 s = bfd_get_section_by_name (obfd, ".toc");
11876 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11877 s = bfd_get_section_by_name (obfd, ".tocbss");
11878 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11879 s = bfd_get_section_by_name (obfd, ".plt");
11880 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11882 /* This may happen for
11883 o references to TOC base (SYM@toc / TOC[tc0]) without a
11885 o bad linker script
11886 o --gc-sections and empty TOC sections
11888 FIXME: Warn user? */
11890 /* Look for a likely section. We probably won't even be
11892 for (s = obfd->sections; s != NULL; s = s->next)
11893 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11895 == (SEC_ALLOC | SEC_SMALL_DATA))
11898 for (s = obfd->sections; s != NULL; s = s->next)
11899 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11900 == (SEC_ALLOC | SEC_SMALL_DATA))
11903 for (s = obfd->sections; s != NULL; s = s->next)
11904 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11908 for (s = obfd->sections; s != NULL; s = s->next)
11909 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11915 TOCstart = s->output_section->vma + s->output_offset;
11917 _bfd_set_gp_value (obfd, TOCstart);
11919 if (info != NULL && s != NULL && is_ppc64_elf (obfd))
11921 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11924 && htab->elf.hgot != NULL)
11926 htab->elf.hgot->type = STT_OBJECT;
11927 htab->elf.hgot->root.type = bfd_link_hash_defined;
11928 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
11929 htab->elf.hgot->root.u.def.section = s;
11935 /* Build all the stubs associated with the current output file.
11936 The stubs are kept in a hash table attached to the main linker
11937 hash table. This function is called via gldelf64ppc_finish. */
11940 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11941 struct bfd_link_info *info,
11944 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11945 asection *stub_sec;
11947 int stub_sec_count = 0;
11952 htab->emit_stub_syms = emit_stub_syms;
11954 /* Allocate memory to hold the linker stubs. */
11955 for (stub_sec = htab->stub_bfd->sections;
11957 stub_sec = stub_sec->next)
11958 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11959 && stub_sec->size != 0)
11961 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11962 if (stub_sec->contents == NULL)
11964 /* We want to check that built size is the same as calculated
11965 size. rawsize is a convenient location to use. */
11966 stub_sec->rawsize = stub_sec->size;
11967 stub_sec->size = 0;
11970 if (htab->glink != NULL && htab->glink->size != 0)
11975 /* Build the .glink plt call stub. */
11976 if (htab->emit_stub_syms)
11978 struct elf_link_hash_entry *h;
11979 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11980 TRUE, FALSE, FALSE);
11983 if (h->root.type == bfd_link_hash_new)
11985 h->root.type = bfd_link_hash_defined;
11986 h->root.u.def.section = htab->glink;
11987 h->root.u.def.value = 8;
11988 h->ref_regular = 1;
11989 h->def_regular = 1;
11990 h->ref_regular_nonweak = 1;
11991 h->forced_local = 1;
11995 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11996 if (info->emitrelocations)
11998 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12001 r->r_offset = (htab->glink->output_offset
12002 + htab->glink->output_section->vma);
12003 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12004 r->r_addend = plt0;
12006 p = htab->glink->contents;
12007 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12008 bfd_put_64 (htab->glink->owner, plt0, p);
12010 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12012 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12014 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12016 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
12018 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12020 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
12022 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
12024 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
12026 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
12028 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
12030 bfd_put_32 (htab->glink->owner, BCTR, p);
12032 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12034 bfd_put_32 (htab->glink->owner, NOP, p);
12038 /* Build the .glink lazy link call stubs. */
12040 while (p < htab->glink->contents + htab->glink->size)
12044 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12049 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12051 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
12054 bfd_put_32 (htab->glink->owner,
12055 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12059 htab->glink->rawsize = p - htab->glink->contents;
12062 if (htab->brlt->size != 0)
12064 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12066 if (htab->brlt->contents == NULL)
12069 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12071 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12072 htab->relbrlt->size);
12073 if (htab->relbrlt->contents == NULL)
12077 if (htab->glink_eh_frame != NULL
12078 && htab->glink_eh_frame->size != 0)
12081 bfd_byte *last_fde;
12082 size_t last_fde_len, size, align, pad;
12084 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12087 htab->glink_eh_frame->contents = p;
12090 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12092 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12093 /* CIE length (rewrite in case little-endian). */
12094 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12095 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12096 p += sizeof (glink_eh_frame_cie);
12098 for (stub_sec = htab->stub_bfd->sections;
12100 stub_sec = stub_sec->next)
12101 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12106 bfd_put_32 (htab->elf.dynobj, 16, p);
12109 val = p - htab->glink_eh_frame->contents;
12110 bfd_put_32 (htab->elf.dynobj, val, p);
12112 /* Offset to stub section. */
12113 val = (stub_sec->output_section->vma
12114 + stub_sec->output_offset);
12115 val -= (htab->glink_eh_frame->output_section->vma
12116 + htab->glink_eh_frame->output_offset);
12117 val -= p - htab->glink_eh_frame->contents;
12118 if (val + 0x80000000 > 0xffffffff)
12120 info->callbacks->einfo
12121 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12125 bfd_put_32 (htab->elf.dynobj, val, p);
12127 /* stub section size. */
12128 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12130 /* Augmentation. */
12135 if (htab->glink != NULL && htab->glink->size != 0)
12140 bfd_put_32 (htab->elf.dynobj, 20, p);
12143 val = p - htab->glink_eh_frame->contents;
12144 bfd_put_32 (htab->elf.dynobj, val, p);
12146 /* Offset to .glink. */
12147 val = (htab->glink->output_section->vma
12148 + htab->glink->output_offset
12150 val -= (htab->glink_eh_frame->output_section->vma
12151 + htab->glink_eh_frame->output_offset);
12152 val -= p - htab->glink_eh_frame->contents;
12153 if (val + 0x80000000 > 0xffffffff)
12155 info->callbacks->einfo
12156 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12157 htab->glink->name);
12160 bfd_put_32 (htab->elf.dynobj, val, p);
12163 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
12165 /* Augmentation. */
12168 *p++ = DW_CFA_advance_loc + 1;
12169 *p++ = DW_CFA_register;
12172 *p++ = DW_CFA_advance_loc + 4;
12173 *p++ = DW_CFA_restore_extended;
12176 /* Subsume any padding into the last FDE if user .eh_frame
12177 sections are aligned more than glink_eh_frame. Otherwise any
12178 zero padding will be seen as a terminator. */
12179 size = p - htab->glink_eh_frame->contents;
12181 align <<= htab->glink_eh_frame->output_section->alignment_power;
12183 pad = ((size + align) & ~align) - size;
12184 htab->glink_eh_frame->size = size + pad;
12185 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12188 /* Build the stubs as directed by the stub hash table. */
12189 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12191 if (htab->relbrlt != NULL)
12192 htab->relbrlt->reloc_count = 0;
12194 if (htab->plt_stub_align != 0)
12195 for (stub_sec = htab->stub_bfd->sections;
12197 stub_sec = stub_sec->next)
12198 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12199 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12200 & (-1 << htab->plt_stub_align));
12202 for (stub_sec = htab->stub_bfd->sections;
12204 stub_sec = stub_sec->next)
12205 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12207 stub_sec_count += 1;
12208 if (stub_sec->rawsize != stub_sec->size)
12212 if (stub_sec != NULL
12213 || htab->glink->rawsize != htab->glink->size
12214 || (htab->glink_eh_frame != NULL
12215 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12217 htab->stub_error = TRUE;
12218 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12221 if (htab->stub_error)
12226 *stats = bfd_malloc (500);
12227 if (*stats == NULL)
12230 sprintf (*stats, _("linker stubs in %u group%s\n"
12232 " toc adjust %lu\n"
12233 " long branch %lu\n"
12234 " long toc adj %lu\n"
12236 " plt call toc %lu"),
12238 stub_sec_count == 1 ? "" : "s",
12239 htab->stub_count[ppc_stub_long_branch - 1],
12240 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12241 htab->stub_count[ppc_stub_plt_branch - 1],
12242 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12243 htab->stub_count[ppc_stub_plt_call - 1],
12244 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12249 /* This function undoes the changes made by add_symbol_adjust. */
12252 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12254 struct ppc_link_hash_entry *eh;
12256 if (h->root.type == bfd_link_hash_indirect)
12259 eh = (struct ppc_link_hash_entry *) h;
12260 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12263 eh->elf.root.type = bfd_link_hash_undefined;
12268 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12270 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12273 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12276 /* What to do when ld finds relocations against symbols defined in
12277 discarded sections. */
12279 static unsigned int
12280 ppc64_elf_action_discarded (asection *sec)
12282 if (strcmp (".opd", sec->name) == 0)
12285 if (strcmp (".toc", sec->name) == 0)
12288 if (strcmp (".toc1", sec->name) == 0)
12291 return _bfd_elf_default_action_discarded (sec);
12294 /* The RELOCATE_SECTION function is called by the ELF backend linker
12295 to handle the relocations for a section.
12297 The relocs are always passed as Rela structures; if the section
12298 actually uses Rel structures, the r_addend field will always be
12301 This function is responsible for adjust the section contents as
12302 necessary, and (if using Rela relocs and generating a
12303 relocatable output file) adjusting the reloc addend as
12306 This function does not have to worry about setting the reloc
12307 address or the reloc symbol index.
12309 LOCAL_SYMS is a pointer to the swapped in local symbols.
12311 LOCAL_SECTIONS is an array giving the section in the input file
12312 corresponding to the st_shndx field of each local symbol.
12314 The global hash table entry for the global symbols can be found
12315 via elf_sym_hashes (input_bfd).
12317 When generating relocatable output, this function must handle
12318 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12319 going to be the section symbol corresponding to the output
12320 section, which means that the addend must be adjusted
12324 ppc64_elf_relocate_section (bfd *output_bfd,
12325 struct bfd_link_info *info,
12327 asection *input_section,
12328 bfd_byte *contents,
12329 Elf_Internal_Rela *relocs,
12330 Elf_Internal_Sym *local_syms,
12331 asection **local_sections)
12333 struct ppc_link_hash_table *htab;
12334 Elf_Internal_Shdr *symtab_hdr;
12335 struct elf_link_hash_entry **sym_hashes;
12336 Elf_Internal_Rela *rel;
12337 Elf_Internal_Rela *relend;
12338 Elf_Internal_Rela outrel;
12340 struct got_entry **local_got_ents;
12342 bfd_boolean ret = TRUE;
12343 bfd_boolean is_opd;
12344 /* Assume 'at' branch hints. */
12345 bfd_boolean is_isa_v2 = TRUE;
12346 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12348 /* Initialize howto table if needed. */
12349 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12352 htab = ppc_hash_table (info);
12356 /* Don't relocate stub sections. */
12357 if (input_section->owner == htab->stub_bfd)
12360 BFD_ASSERT (is_ppc64_elf (input_bfd));
12362 local_got_ents = elf_local_got_ents (input_bfd);
12363 TOCstart = elf_gp (output_bfd);
12364 symtab_hdr = &elf_symtab_hdr (input_bfd);
12365 sym_hashes = elf_sym_hashes (input_bfd);
12366 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12369 relend = relocs + input_section->reloc_count;
12370 for (; rel < relend; rel++)
12372 enum elf_ppc64_reloc_type r_type;
12374 bfd_reloc_status_type r;
12375 Elf_Internal_Sym *sym;
12377 struct elf_link_hash_entry *h_elf;
12378 struct ppc_link_hash_entry *h;
12379 struct ppc_link_hash_entry *fdh;
12380 const char *sym_name;
12381 unsigned long r_symndx, toc_symndx;
12382 bfd_vma toc_addend;
12383 unsigned char tls_mask, tls_gd, tls_type;
12384 unsigned char sym_type;
12385 bfd_vma relocation;
12386 bfd_boolean unresolved_reloc;
12387 bfd_boolean warned;
12388 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12391 struct ppc_stub_hash_entry *stub_entry;
12392 bfd_vma max_br_offset;
12394 const Elf_Internal_Rela orig_rel = *rel;
12396 r_type = ELF64_R_TYPE (rel->r_info);
12397 r_symndx = ELF64_R_SYM (rel->r_info);
12399 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12400 symbol of the previous ADDR64 reloc. The symbol gives us the
12401 proper TOC base to use. */
12402 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12404 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12406 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12412 unresolved_reloc = FALSE;
12415 if (r_symndx < symtab_hdr->sh_info)
12417 /* It's a local symbol. */
12418 struct _opd_sec_data *opd;
12420 sym = local_syms + r_symndx;
12421 sec = local_sections[r_symndx];
12422 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12423 sym_type = ELF64_ST_TYPE (sym->st_info);
12424 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12425 opd = get_opd_info (sec);
12426 if (opd != NULL && opd->adjust != NULL)
12428 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12433 /* If this is a relocation against the opd section sym
12434 and we have edited .opd, adjust the reloc addend so
12435 that ld -r and ld --emit-relocs output is correct.
12436 If it is a reloc against some other .opd symbol,
12437 then the symbol value will be adjusted later. */
12438 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12439 rel->r_addend += adjust;
12441 relocation += adjust;
12447 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12448 r_symndx, symtab_hdr, sym_hashes,
12449 h_elf, sec, relocation,
12450 unresolved_reloc, warned);
12451 sym_name = h_elf->root.root.string;
12452 sym_type = h_elf->type;
12454 && sec->owner == output_bfd
12455 && strcmp (sec->name, ".opd") == 0)
12457 /* This is a symbol defined in a linker script. All
12458 such are defined in output sections, even those
12459 defined by simple assignment from a symbol defined in
12460 an input section. Transfer the symbol to an
12461 appropriate input .opd section, so that a branch to
12462 this symbol will be mapped to the location specified
12463 by the opd entry. */
12464 struct bfd_link_order *lo;
12465 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
12466 if (lo->type == bfd_indirect_link_order)
12468 asection *isec = lo->u.indirect.section;
12469 if (h_elf->root.u.def.value >= isec->output_offset
12470 && h_elf->root.u.def.value < (isec->output_offset
12473 h_elf->root.u.def.value -= isec->output_offset;
12474 h_elf->root.u.def.section = isec;
12481 h = (struct ppc_link_hash_entry *) h_elf;
12483 if (sec != NULL && discarded_section (sec))
12484 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12486 ppc64_elf_howto_table[r_type], 0,
12489 if (info->relocatable)
12492 if (h != NULL && &h->elf == htab->elf.hgot)
12494 relocation = (TOCstart
12495 + htab->stub_group[input_section->id].toc_off);
12496 sec = bfd_abs_section_ptr;
12497 unresolved_reloc = FALSE;
12500 /* TLS optimizations. Replace instruction sequences and relocs
12501 based on information we collected in tls_optimize. We edit
12502 RELOCS so that --emit-relocs will output something sensible
12503 for the final instruction stream. */
12508 tls_mask = h->tls_mask;
12509 else if (local_got_ents != NULL)
12511 struct plt_entry **local_plt = (struct plt_entry **)
12512 (local_got_ents + symtab_hdr->sh_info);
12513 unsigned char *lgot_masks = (unsigned char *)
12514 (local_plt + symtab_hdr->sh_info);
12515 tls_mask = lgot_masks[r_symndx];
12518 && (r_type == R_PPC64_TLS
12519 || r_type == R_PPC64_TLSGD
12520 || r_type == R_PPC64_TLSLD))
12522 /* Check for toc tls entries. */
12523 unsigned char *toc_tls;
12525 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12526 &local_syms, rel, input_bfd))
12530 tls_mask = *toc_tls;
12533 /* Check that tls relocs are used with tls syms, and non-tls
12534 relocs are used with non-tls syms. */
12535 if (r_symndx != STN_UNDEF
12536 && r_type != R_PPC64_NONE
12538 || h->elf.root.type == bfd_link_hash_defined
12539 || h->elf.root.type == bfd_link_hash_defweak)
12540 && (IS_PPC64_TLS_RELOC (r_type)
12541 != (sym_type == STT_TLS
12542 || (sym_type == STT_SECTION
12543 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12546 && (r_type == R_PPC64_TLS
12547 || r_type == R_PPC64_TLSGD
12548 || r_type == R_PPC64_TLSLD))
12549 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12552 info->callbacks->einfo
12553 (!IS_PPC64_TLS_RELOC (r_type)
12554 ? _("%P: %H: %s used with TLS symbol `%T'\n")
12555 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
12556 input_bfd, input_section, rel->r_offset,
12557 ppc64_elf_howto_table[r_type]->name,
12561 /* Ensure reloc mapping code below stays sane. */
12562 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12563 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12564 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12565 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12566 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12567 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12568 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12569 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12570 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12571 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12579 case R_PPC64_LO_DS_OPT:
12580 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12581 if ((insn & (0x3f << 26)) != 58u << 26)
12583 insn += (14u << 26) - (58u << 26);
12584 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12585 r_type = R_PPC64_TOC16_LO;
12586 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12589 case R_PPC64_TOC16:
12590 case R_PPC64_TOC16_LO:
12591 case R_PPC64_TOC16_DS:
12592 case R_PPC64_TOC16_LO_DS:
12594 /* Check for toc tls entries. */
12595 unsigned char *toc_tls;
12598 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12599 &local_syms, rel, input_bfd);
12605 tls_mask = *toc_tls;
12606 if (r_type == R_PPC64_TOC16_DS
12607 || r_type == R_PPC64_TOC16_LO_DS)
12610 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12615 /* If we found a GD reloc pair, then we might be
12616 doing a GD->IE transition. */
12619 tls_gd = TLS_TPRELGD;
12620 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12623 else if (retval == 3)
12625 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12633 case R_PPC64_GOT_TPREL16_HI:
12634 case R_PPC64_GOT_TPREL16_HA:
12636 && (tls_mask & TLS_TPREL) == 0)
12638 rel->r_offset -= d_offset;
12639 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12640 r_type = R_PPC64_NONE;
12641 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12645 case R_PPC64_GOT_TPREL16_DS:
12646 case R_PPC64_GOT_TPREL16_LO_DS:
12648 && (tls_mask & TLS_TPREL) == 0)
12651 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12653 insn |= 0x3c0d0000; /* addis 0,13,0 */
12654 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12655 r_type = R_PPC64_TPREL16_HA;
12656 if (toc_symndx != 0)
12658 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12659 rel->r_addend = toc_addend;
12660 /* We changed the symbol. Start over in order to
12661 get h, sym, sec etc. right. */
12666 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12672 && (tls_mask & TLS_TPREL) == 0)
12674 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12675 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12678 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12679 /* Was PPC64_TLS which sits on insn boundary, now
12680 PPC64_TPREL16_LO which is at low-order half-word. */
12681 rel->r_offset += d_offset;
12682 r_type = R_PPC64_TPREL16_LO;
12683 if (toc_symndx != 0)
12685 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12686 rel->r_addend = toc_addend;
12687 /* We changed the symbol. Start over in order to
12688 get h, sym, sec etc. right. */
12693 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12697 case R_PPC64_GOT_TLSGD16_HI:
12698 case R_PPC64_GOT_TLSGD16_HA:
12699 tls_gd = TLS_TPRELGD;
12700 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12704 case R_PPC64_GOT_TLSLD16_HI:
12705 case R_PPC64_GOT_TLSLD16_HA:
12706 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12709 if ((tls_mask & tls_gd) != 0)
12710 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12711 + R_PPC64_GOT_TPREL16_DS);
12714 rel->r_offset -= d_offset;
12715 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12716 r_type = R_PPC64_NONE;
12718 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12722 case R_PPC64_GOT_TLSGD16:
12723 case R_PPC64_GOT_TLSGD16_LO:
12724 tls_gd = TLS_TPRELGD;
12725 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12729 case R_PPC64_GOT_TLSLD16:
12730 case R_PPC64_GOT_TLSLD16_LO:
12731 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12733 unsigned int insn1, insn2, insn3;
12737 offset = (bfd_vma) -1;
12738 /* If not using the newer R_PPC64_TLSGD/LD to mark
12739 __tls_get_addr calls, we must trust that the call
12740 stays with its arg setup insns, ie. that the next
12741 reloc is the __tls_get_addr call associated with
12742 the current reloc. Edit both insns. */
12743 if (input_section->has_tls_get_addr_call
12744 && rel + 1 < relend
12745 && branch_reloc_hash_match (input_bfd, rel + 1,
12746 htab->tls_get_addr,
12747 htab->tls_get_addr_fd))
12748 offset = rel[1].r_offset;
12749 if ((tls_mask & tls_gd) != 0)
12752 insn1 = bfd_get_32 (output_bfd,
12753 contents + rel->r_offset - d_offset);
12754 insn1 &= (1 << 26) - (1 << 2);
12755 insn1 |= 58 << 26; /* ld */
12756 insn2 = 0x7c636a14; /* add 3,3,13 */
12757 if (offset != (bfd_vma) -1)
12758 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12759 if ((tls_mask & TLS_EXPLICIT) == 0)
12760 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12761 + R_PPC64_GOT_TPREL16_DS);
12763 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12764 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12769 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12770 insn2 = 0x38630000; /* addi 3,3,0 */
12773 /* Was an LD reloc. */
12775 sec = local_sections[toc_symndx];
12777 r_symndx < symtab_hdr->sh_info;
12779 if (local_sections[r_symndx] == sec)
12781 if (r_symndx >= symtab_hdr->sh_info)
12782 r_symndx = STN_UNDEF;
12783 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12784 if (r_symndx != STN_UNDEF)
12785 rel->r_addend -= (local_syms[r_symndx].st_value
12786 + sec->output_offset
12787 + sec->output_section->vma);
12789 else if (toc_symndx != 0)
12791 r_symndx = toc_symndx;
12792 rel->r_addend = toc_addend;
12794 r_type = R_PPC64_TPREL16_HA;
12795 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12796 if (offset != (bfd_vma) -1)
12798 rel[1].r_info = ELF64_R_INFO (r_symndx,
12799 R_PPC64_TPREL16_LO);
12800 rel[1].r_offset = offset + d_offset;
12801 rel[1].r_addend = rel->r_addend;
12804 bfd_put_32 (output_bfd, insn1,
12805 contents + rel->r_offset - d_offset);
12806 if (offset != (bfd_vma) -1)
12808 insn3 = bfd_get_32 (output_bfd,
12809 contents + offset + 4);
12811 || insn3 == CROR_151515 || insn3 == CROR_313131)
12813 rel[1].r_offset += 4;
12814 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12817 bfd_put_32 (output_bfd, insn2, contents + offset);
12819 if ((tls_mask & tls_gd) == 0
12820 && (tls_gd == 0 || toc_symndx != 0))
12822 /* We changed the symbol. Start over in order
12823 to get h, sym, sec etc. right. */
12830 case R_PPC64_TLSGD:
12831 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12833 unsigned int insn2, insn3;
12834 bfd_vma offset = rel->r_offset;
12836 if ((tls_mask & TLS_TPRELGD) != 0)
12839 r_type = R_PPC64_NONE;
12840 insn2 = 0x7c636a14; /* add 3,3,13 */
12845 if (toc_symndx != 0)
12847 r_symndx = toc_symndx;
12848 rel->r_addend = toc_addend;
12850 r_type = R_PPC64_TPREL16_LO;
12851 rel->r_offset = offset + d_offset;
12852 insn2 = 0x38630000; /* addi 3,3,0 */
12854 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12855 /* Zap the reloc on the _tls_get_addr call too. */
12856 BFD_ASSERT (offset == rel[1].r_offset);
12857 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12858 insn3 = bfd_get_32 (output_bfd,
12859 contents + offset + 4);
12861 || insn3 == CROR_151515 || insn3 == CROR_313131)
12863 rel->r_offset += 4;
12864 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12867 bfd_put_32 (output_bfd, insn2, contents + offset);
12868 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12876 case R_PPC64_TLSLD:
12877 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12879 unsigned int insn2, insn3;
12880 bfd_vma offset = rel->r_offset;
12883 sec = local_sections[toc_symndx];
12885 r_symndx < symtab_hdr->sh_info;
12887 if (local_sections[r_symndx] == sec)
12889 if (r_symndx >= symtab_hdr->sh_info)
12890 r_symndx = STN_UNDEF;
12891 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12892 if (r_symndx != STN_UNDEF)
12893 rel->r_addend -= (local_syms[r_symndx].st_value
12894 + sec->output_offset
12895 + sec->output_section->vma);
12897 r_type = R_PPC64_TPREL16_LO;
12898 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12899 rel->r_offset = offset + d_offset;
12900 /* Zap the reloc on the _tls_get_addr call too. */
12901 BFD_ASSERT (offset == rel[1].r_offset);
12902 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12903 insn2 = 0x38630000; /* addi 3,3,0 */
12904 insn3 = bfd_get_32 (output_bfd,
12905 contents + offset + 4);
12907 || insn3 == CROR_151515 || insn3 == CROR_313131)
12909 rel->r_offset += 4;
12910 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12913 bfd_put_32 (output_bfd, insn2, contents + offset);
12919 case R_PPC64_DTPMOD64:
12920 if (rel + 1 < relend
12921 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12922 && rel[1].r_offset == rel->r_offset + 8)
12924 if ((tls_mask & TLS_GD) == 0)
12926 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12927 if ((tls_mask & TLS_TPRELGD) != 0)
12928 r_type = R_PPC64_TPREL64;
12931 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12932 r_type = R_PPC64_NONE;
12934 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12939 if ((tls_mask & TLS_LD) == 0)
12941 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12942 r_type = R_PPC64_NONE;
12943 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12948 case R_PPC64_TPREL64:
12949 if ((tls_mask & TLS_TPREL) == 0)
12951 r_type = R_PPC64_NONE;
12952 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12957 /* Handle other relocations that tweak non-addend part of insn. */
12959 max_br_offset = 1 << 25;
12960 addend = rel->r_addend;
12961 reloc_dest = DEST_NORMAL;
12967 case R_PPC64_TOCSAVE:
12968 if (relocation + addend == (rel->r_offset
12969 + input_section->output_offset
12970 + input_section->output_section->vma)
12971 && tocsave_find (htab, NO_INSERT,
12972 &local_syms, rel, input_bfd))
12974 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12976 || insn == CROR_151515 || insn == CROR_313131)
12977 bfd_put_32 (input_bfd, STD_R2_40R1,
12978 contents + rel->r_offset);
12982 /* Branch taken prediction relocations. */
12983 case R_PPC64_ADDR14_BRTAKEN:
12984 case R_PPC64_REL14_BRTAKEN:
12985 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12988 /* Branch not taken prediction relocations. */
12989 case R_PPC64_ADDR14_BRNTAKEN:
12990 case R_PPC64_REL14_BRNTAKEN:
12991 insn |= bfd_get_32 (output_bfd,
12992 contents + rel->r_offset) & ~(0x01 << 21);
12995 case R_PPC64_REL14:
12996 max_br_offset = 1 << 15;
12999 case R_PPC64_REL24:
13000 /* Calls to functions with a different TOC, such as calls to
13001 shared objects, need to alter the TOC pointer. This is
13002 done using a linkage stub. A REL24 branching to these
13003 linkage stubs needs to be followed by a nop, as the nop
13004 will be replaced with an instruction to restore the TOC
13009 && h->oh->is_func_descriptor)
13010 fdh = ppc_follow_link (h->oh);
13011 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13013 if (stub_entry != NULL
13014 && (stub_entry->stub_type == ppc_stub_plt_call
13015 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13016 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13017 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13019 bfd_boolean can_plt_call = FALSE;
13021 /* All of these stubs will modify r2, so there must be a
13022 branch and link followed by a nop. The nop is
13023 replaced by an insn to restore r2. */
13024 if (rel->r_offset + 8 <= input_section->size)
13028 br = bfd_get_32 (input_bfd,
13029 contents + rel->r_offset);
13034 nop = bfd_get_32 (input_bfd,
13035 contents + rel->r_offset + 4);
13037 || nop == CROR_151515 || nop == CROR_313131)
13040 && (h == htab->tls_get_addr_fd
13041 || h == htab->tls_get_addr)
13042 && !htab->no_tls_get_addr_opt)
13044 /* Special stub used, leave nop alone. */
13047 bfd_put_32 (input_bfd, LD_R2_40R1,
13048 contents + rel->r_offset + 4);
13049 can_plt_call = TRUE;
13054 if (!can_plt_call && h != NULL)
13056 const char *name = h->elf.root.root.string;
13061 if (strncmp (name, "__libc_start_main", 17) == 0
13062 && (name[17] == 0 || name[17] == '@'))
13064 /* Allow crt1 branch to go via a toc adjusting
13065 stub. Other calls that never return could do
13066 the same, if we could detect such. */
13067 can_plt_call = TRUE;
13073 /* g++ as of 20130507 emits self-calls without a
13074 following nop. This is arguably wrong since we
13075 have conflicting information. On the one hand a
13076 global symbol and on the other a local call
13077 sequence, but don't error for this special case.
13078 It isn't possible to cheaply verify we have
13079 exactly such a call. Allow all calls to the same
13081 asection *code_sec = sec;
13083 if (get_opd_info (sec) != NULL)
13085 bfd_vma off = (relocation + addend
13086 - sec->output_section->vma
13087 - sec->output_offset);
13089 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
13091 if (code_sec == input_section)
13092 can_plt_call = TRUE;
13097 info->callbacks->einfo
13098 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13099 "recompile with -fPIC"),
13100 input_bfd, input_section, rel->r_offset, sym_name);
13102 bfd_set_error (bfd_error_bad_value);
13107 && (stub_entry->stub_type == ppc_stub_plt_call
13108 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13109 unresolved_reloc = FALSE;
13112 if ((stub_entry == NULL
13113 || stub_entry->stub_type == ppc_stub_long_branch
13114 || stub_entry->stub_type == ppc_stub_plt_branch)
13115 && get_opd_info (sec) != NULL)
13117 /* The branch destination is the value of the opd entry. */
13118 bfd_vma off = (relocation + addend
13119 - sec->output_section->vma
13120 - sec->output_offset);
13121 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13122 if (dest != (bfd_vma) -1)
13126 reloc_dest = DEST_OPD;
13130 /* If the branch is out of reach we ought to have a long
13132 from = (rel->r_offset
13133 + input_section->output_offset
13134 + input_section->output_section->vma);
13136 if (stub_entry != NULL
13137 && (stub_entry->stub_type == ppc_stub_long_branch
13138 || stub_entry->stub_type == ppc_stub_plt_branch)
13139 && (r_type == R_PPC64_ADDR14_BRTAKEN
13140 || r_type == R_PPC64_ADDR14_BRNTAKEN
13141 || (relocation + addend - from + max_br_offset
13142 < 2 * max_br_offset)))
13143 /* Don't use the stub if this branch is in range. */
13146 if (stub_entry != NULL)
13148 /* Munge up the value and addend so that we call the stub
13149 rather than the procedure directly. */
13150 relocation = (stub_entry->stub_offset
13151 + stub_entry->stub_sec->output_offset
13152 + stub_entry->stub_sec->output_section->vma);
13154 reloc_dest = DEST_STUB;
13156 if ((stub_entry->stub_type == ppc_stub_plt_call
13157 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13158 && (ALWAYS_EMIT_R2SAVE
13159 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13160 && rel + 1 < relend
13161 && rel[1].r_offset == rel->r_offset + 4
13162 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13170 /* Set 'a' bit. This is 0b00010 in BO field for branch
13171 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13172 for branch on CTR insns (BO == 1a00t or 1a01t). */
13173 if ((insn & (0x14 << 21)) == (0x04 << 21))
13174 insn |= 0x02 << 21;
13175 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13176 insn |= 0x08 << 21;
13182 /* Invert 'y' bit if not the default. */
13183 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13184 insn ^= 0x01 << 21;
13187 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13190 /* NOP out calls to undefined weak functions.
13191 We can thus call a weak function without first
13192 checking whether the function is defined. */
13194 && h->elf.root.type == bfd_link_hash_undefweak
13195 && h->elf.dynindx == -1
13196 && r_type == R_PPC64_REL24
13200 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13206 /* Set `addend'. */
13211 info->callbacks->einfo
13212 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13213 input_bfd, (int) r_type, sym_name);
13215 bfd_set_error (bfd_error_bad_value);
13221 case R_PPC64_TLSGD:
13222 case R_PPC64_TLSLD:
13223 case R_PPC64_TOCSAVE:
13224 case R_PPC64_GNU_VTINHERIT:
13225 case R_PPC64_GNU_VTENTRY:
13228 /* GOT16 relocations. Like an ADDR16 using the symbol's
13229 address in the GOT as relocation value instead of the
13230 symbol's value itself. Also, create a GOT entry for the
13231 symbol and put the symbol value there. */
13232 case R_PPC64_GOT_TLSGD16:
13233 case R_PPC64_GOT_TLSGD16_LO:
13234 case R_PPC64_GOT_TLSGD16_HI:
13235 case R_PPC64_GOT_TLSGD16_HA:
13236 tls_type = TLS_TLS | TLS_GD;
13239 case R_PPC64_GOT_TLSLD16:
13240 case R_PPC64_GOT_TLSLD16_LO:
13241 case R_PPC64_GOT_TLSLD16_HI:
13242 case R_PPC64_GOT_TLSLD16_HA:
13243 tls_type = TLS_TLS | TLS_LD;
13246 case R_PPC64_GOT_TPREL16_DS:
13247 case R_PPC64_GOT_TPREL16_LO_DS:
13248 case R_PPC64_GOT_TPREL16_HI:
13249 case R_PPC64_GOT_TPREL16_HA:
13250 tls_type = TLS_TLS | TLS_TPREL;
13253 case R_PPC64_GOT_DTPREL16_DS:
13254 case R_PPC64_GOT_DTPREL16_LO_DS:
13255 case R_PPC64_GOT_DTPREL16_HI:
13256 case R_PPC64_GOT_DTPREL16_HA:
13257 tls_type = TLS_TLS | TLS_DTPREL;
13260 case R_PPC64_GOT16:
13261 case R_PPC64_GOT16_LO:
13262 case R_PPC64_GOT16_HI:
13263 case R_PPC64_GOT16_HA:
13264 case R_PPC64_GOT16_DS:
13265 case R_PPC64_GOT16_LO_DS:
13268 /* Relocation is to the entry for this symbol in the global
13273 unsigned long indx = 0;
13274 struct got_entry *ent;
13276 if (tls_type == (TLS_TLS | TLS_LD)
13278 || !h->elf.def_dynamic))
13279 ent = ppc64_tlsld_got (input_bfd);
13285 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13286 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13289 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13290 /* This is actually a static link, or it is a
13291 -Bsymbolic link and the symbol is defined
13292 locally, or the symbol was forced to be local
13293 because of a version file. */
13297 BFD_ASSERT (h->elf.dynindx != -1);
13298 indx = h->elf.dynindx;
13299 unresolved_reloc = FALSE;
13301 ent = h->elf.got.glist;
13305 if (local_got_ents == NULL)
13307 ent = local_got_ents[r_symndx];
13310 for (; ent != NULL; ent = ent->next)
13311 if (ent->addend == orig_rel.r_addend
13312 && ent->owner == input_bfd
13313 && ent->tls_type == tls_type)
13319 if (ent->is_indirect)
13320 ent = ent->got.ent;
13321 offp = &ent->got.offset;
13322 got = ppc64_elf_tdata (ent->owner)->got;
13326 /* The offset must always be a multiple of 8. We use the
13327 least significant bit to record whether we have already
13328 processed this entry. */
13330 if ((off & 1) != 0)
13334 /* Generate relocs for the dynamic linker, except in
13335 the case of TLSLD where we'll use one entry per
13343 ? h->elf.type == STT_GNU_IFUNC
13344 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13346 relgot = htab->reliplt;
13347 else if ((info->shared || indx != 0)
13349 || (tls_type == (TLS_TLS | TLS_LD)
13350 && !h->elf.def_dynamic)
13351 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13352 || h->elf.root.type != bfd_link_hash_undefweak))
13353 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13354 if (relgot != NULL)
13356 outrel.r_offset = (got->output_section->vma
13357 + got->output_offset
13359 outrel.r_addend = addend;
13360 if (tls_type & (TLS_LD | TLS_GD))
13362 outrel.r_addend = 0;
13363 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13364 if (tls_type == (TLS_TLS | TLS_GD))
13366 loc = relgot->contents;
13367 loc += (relgot->reloc_count++
13368 * sizeof (Elf64_External_Rela));
13369 bfd_elf64_swap_reloca_out (output_bfd,
13371 outrel.r_offset += 8;
13372 outrel.r_addend = addend;
13374 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13377 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13378 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13379 else if (tls_type == (TLS_TLS | TLS_TPREL))
13380 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13381 else if (indx != 0)
13382 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13386 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13388 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13390 /* Write the .got section contents for the sake
13392 loc = got->contents + off;
13393 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13397 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13399 outrel.r_addend += relocation;
13400 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13401 outrel.r_addend -= htab->elf.tls_sec->vma;
13403 loc = relgot->contents;
13404 loc += (relgot->reloc_count++
13405 * sizeof (Elf64_External_Rela));
13406 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13409 /* Init the .got section contents here if we're not
13410 emitting a reloc. */
13413 relocation += addend;
13414 if (tls_type == (TLS_TLS | TLS_LD))
13416 else if (tls_type != 0)
13418 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13419 if (tls_type == (TLS_TLS | TLS_TPREL))
13420 relocation += DTP_OFFSET - TP_OFFSET;
13422 if (tls_type == (TLS_TLS | TLS_GD))
13424 bfd_put_64 (output_bfd, relocation,
13425 got->contents + off + 8);
13430 bfd_put_64 (output_bfd, relocation,
13431 got->contents + off);
13435 if (off >= (bfd_vma) -2)
13438 relocation = got->output_section->vma + got->output_offset + off;
13439 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13443 case R_PPC64_PLT16_HA:
13444 case R_PPC64_PLT16_HI:
13445 case R_PPC64_PLT16_LO:
13446 case R_PPC64_PLT32:
13447 case R_PPC64_PLT64:
13448 /* Relocation is to the entry for this symbol in the
13449 procedure linkage table. */
13451 /* Resolve a PLT reloc against a local symbol directly,
13452 without using the procedure linkage table. */
13456 /* It's possible that we didn't make a PLT entry for this
13457 symbol. This happens when statically linking PIC code,
13458 or when using -Bsymbolic. Go find a match if there is a
13460 if (htab->plt != NULL)
13462 struct plt_entry *ent;
13463 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13464 if (ent->addend == orig_rel.r_addend
13465 && ent->plt.offset != (bfd_vma) -1)
13467 relocation = (htab->plt->output_section->vma
13468 + htab->plt->output_offset
13469 + ent->plt.offset);
13470 unresolved_reloc = FALSE;
13476 /* Relocation value is TOC base. */
13477 relocation = TOCstart;
13478 if (r_symndx == STN_UNDEF)
13479 relocation += htab->stub_group[input_section->id].toc_off;
13480 else if (unresolved_reloc)
13482 else if (sec != NULL && sec->id <= htab->top_id)
13483 relocation += htab->stub_group[sec->id].toc_off;
13485 unresolved_reloc = TRUE;
13488 /* TOC16 relocs. We want the offset relative to the TOC base,
13489 which is the address of the start of the TOC plus 0x8000.
13490 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13492 case R_PPC64_TOC16:
13493 case R_PPC64_TOC16_LO:
13494 case R_PPC64_TOC16_HI:
13495 case R_PPC64_TOC16_DS:
13496 case R_PPC64_TOC16_LO_DS:
13497 case R_PPC64_TOC16_HA:
13498 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13501 /* Relocate against the beginning of the section. */
13502 case R_PPC64_SECTOFF:
13503 case R_PPC64_SECTOFF_LO:
13504 case R_PPC64_SECTOFF_HI:
13505 case R_PPC64_SECTOFF_DS:
13506 case R_PPC64_SECTOFF_LO_DS:
13507 case R_PPC64_SECTOFF_HA:
13509 addend -= sec->output_section->vma;
13512 case R_PPC64_REL16:
13513 case R_PPC64_REL16_LO:
13514 case R_PPC64_REL16_HI:
13515 case R_PPC64_REL16_HA:
13518 case R_PPC64_REL14:
13519 case R_PPC64_REL14_BRNTAKEN:
13520 case R_PPC64_REL14_BRTAKEN:
13521 case R_PPC64_REL24:
13524 case R_PPC64_TPREL16:
13525 case R_PPC64_TPREL16_LO:
13526 case R_PPC64_TPREL16_HI:
13527 case R_PPC64_TPREL16_HA:
13528 case R_PPC64_TPREL16_DS:
13529 case R_PPC64_TPREL16_LO_DS:
13530 case R_PPC64_TPREL16_HIGHER:
13531 case R_PPC64_TPREL16_HIGHERA:
13532 case R_PPC64_TPREL16_HIGHEST:
13533 case R_PPC64_TPREL16_HIGHESTA:
13535 && h->elf.root.type == bfd_link_hash_undefweak
13536 && h->elf.dynindx == -1)
13538 /* Make this relocation against an undefined weak symbol
13539 resolve to zero. This is really just a tweak, since
13540 code using weak externs ought to check that they are
13541 defined before using them. */
13542 bfd_byte *p = contents + rel->r_offset - d_offset;
13544 insn = bfd_get_32 (output_bfd, p);
13545 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13547 bfd_put_32 (output_bfd, insn, p);
13550 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13552 /* The TPREL16 relocs shouldn't really be used in shared
13553 libs as they will result in DT_TEXTREL being set, but
13554 support them anyway. */
13558 case R_PPC64_DTPREL16:
13559 case R_PPC64_DTPREL16_LO:
13560 case R_PPC64_DTPREL16_HI:
13561 case R_PPC64_DTPREL16_HA:
13562 case R_PPC64_DTPREL16_DS:
13563 case R_PPC64_DTPREL16_LO_DS:
13564 case R_PPC64_DTPREL16_HIGHER:
13565 case R_PPC64_DTPREL16_HIGHERA:
13566 case R_PPC64_DTPREL16_HIGHEST:
13567 case R_PPC64_DTPREL16_HIGHESTA:
13568 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13571 case R_PPC64_DTPMOD64:
13576 case R_PPC64_TPREL64:
13577 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13580 case R_PPC64_DTPREL64:
13581 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13584 /* Relocations that may need to be propagated if this is a
13586 case R_PPC64_REL30:
13587 case R_PPC64_REL32:
13588 case R_PPC64_REL64:
13589 case R_PPC64_ADDR14:
13590 case R_PPC64_ADDR14_BRNTAKEN:
13591 case R_PPC64_ADDR14_BRTAKEN:
13592 case R_PPC64_ADDR16:
13593 case R_PPC64_ADDR16_DS:
13594 case R_PPC64_ADDR16_HA:
13595 case R_PPC64_ADDR16_HI:
13596 case R_PPC64_ADDR16_HIGHER:
13597 case R_PPC64_ADDR16_HIGHERA:
13598 case R_PPC64_ADDR16_HIGHEST:
13599 case R_PPC64_ADDR16_HIGHESTA:
13600 case R_PPC64_ADDR16_LO:
13601 case R_PPC64_ADDR16_LO_DS:
13602 case R_PPC64_ADDR24:
13603 case R_PPC64_ADDR32:
13604 case R_PPC64_ADDR64:
13605 case R_PPC64_UADDR16:
13606 case R_PPC64_UADDR32:
13607 case R_PPC64_UADDR64:
13609 if ((input_section->flags & SEC_ALLOC) == 0)
13612 if (NO_OPD_RELOCS && is_opd)
13617 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13618 || h->elf.root.type != bfd_link_hash_undefweak)
13619 && (must_be_dyn_reloc (info, r_type)
13620 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13621 || (ELIMINATE_COPY_RELOCS
13624 && h->elf.dynindx != -1
13625 && !h->elf.non_got_ref
13626 && !h->elf.def_regular)
13629 ? h->elf.type == STT_GNU_IFUNC
13630 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13632 bfd_boolean skip, relocate;
13636 /* When generating a dynamic object, these relocations
13637 are copied into the output file to be resolved at run
13643 out_off = _bfd_elf_section_offset (output_bfd, info,
13644 input_section, rel->r_offset);
13645 if (out_off == (bfd_vma) -1)
13647 else if (out_off == (bfd_vma) -2)
13648 skip = TRUE, relocate = TRUE;
13649 out_off += (input_section->output_section->vma
13650 + input_section->output_offset);
13651 outrel.r_offset = out_off;
13652 outrel.r_addend = rel->r_addend;
13654 /* Optimize unaligned reloc use. */
13655 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13656 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13657 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13658 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13659 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13660 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13661 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13662 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13663 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13666 memset (&outrel, 0, sizeof outrel);
13667 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13669 && r_type != R_PPC64_TOC)
13671 BFD_ASSERT (h->elf.dynindx != -1);
13672 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13676 /* This symbol is local, or marked to become local,
13677 or this is an opd section reloc which must point
13678 at a local function. */
13679 outrel.r_addend += relocation;
13680 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13682 if (is_opd && h != NULL)
13684 /* Lie about opd entries. This case occurs
13685 when building shared libraries and we
13686 reference a function in another shared
13687 lib. The same thing happens for a weak
13688 definition in an application that's
13689 overridden by a strong definition in a
13690 shared lib. (I believe this is a generic
13691 bug in binutils handling of weak syms.)
13692 In these cases we won't use the opd
13693 entry in this lib. */
13694 unresolved_reloc = FALSE;
13697 && r_type == R_PPC64_ADDR64
13699 ? h->elf.type == STT_GNU_IFUNC
13700 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13701 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13704 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13706 /* We need to relocate .opd contents for ld.so.
13707 Prelink also wants simple and consistent rules
13708 for relocs. This make all RELATIVE relocs have
13709 *r_offset equal to r_addend. */
13718 ? h->elf.type == STT_GNU_IFUNC
13719 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13721 info->callbacks->einfo
13722 (_("%P: %H: %s for indirect "
13723 "function `%T' unsupported\n"),
13724 input_bfd, input_section, rel->r_offset,
13725 ppc64_elf_howto_table[r_type]->name,
13729 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13731 else if (sec == NULL || sec->owner == NULL)
13733 bfd_set_error (bfd_error_bad_value);
13740 osec = sec->output_section;
13741 indx = elf_section_data (osec)->dynindx;
13745 if ((osec->flags & SEC_READONLY) == 0
13746 && htab->elf.data_index_section != NULL)
13747 osec = htab->elf.data_index_section;
13749 osec = htab->elf.text_index_section;
13750 indx = elf_section_data (osec)->dynindx;
13752 BFD_ASSERT (indx != 0);
13754 /* We are turning this relocation into one
13755 against a section symbol, so subtract out
13756 the output section's address but not the
13757 offset of the input section in the output
13759 outrel.r_addend -= osec->vma;
13762 outrel.r_info = ELF64_R_INFO (indx, r_type);
13766 sreloc = elf_section_data (input_section)->sreloc;
13768 ? h->elf.type == STT_GNU_IFUNC
13769 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13770 sreloc = htab->reliplt;
13771 if (sreloc == NULL)
13774 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13777 loc = sreloc->contents;
13778 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13779 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13781 /* If this reloc is against an external symbol, it will
13782 be computed at runtime, so there's no need to do
13783 anything now. However, for the sake of prelink ensure
13784 that the section contents are a known value. */
13787 unresolved_reloc = FALSE;
13788 /* The value chosen here is quite arbitrary as ld.so
13789 ignores section contents except for the special
13790 case of .opd where the contents might be accessed
13791 before relocation. Choose zero, as that won't
13792 cause reloc overflow. */
13795 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13796 to improve backward compatibility with older
13798 if (r_type == R_PPC64_ADDR64)
13799 addend = outrel.r_addend;
13800 /* Adjust pc_relative relocs to have zero in *r_offset. */
13801 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13802 addend = (input_section->output_section->vma
13803 + input_section->output_offset
13810 case R_PPC64_GLOB_DAT:
13811 case R_PPC64_JMP_SLOT:
13812 case R_PPC64_JMP_IREL:
13813 case R_PPC64_RELATIVE:
13814 /* We shouldn't ever see these dynamic relocs in relocatable
13816 /* Fall through. */
13818 case R_PPC64_PLTGOT16:
13819 case R_PPC64_PLTGOT16_DS:
13820 case R_PPC64_PLTGOT16_HA:
13821 case R_PPC64_PLTGOT16_HI:
13822 case R_PPC64_PLTGOT16_LO:
13823 case R_PPC64_PLTGOT16_LO_DS:
13824 case R_PPC64_PLTREL32:
13825 case R_PPC64_PLTREL64:
13826 /* These ones haven't been implemented yet. */
13828 info->callbacks->einfo
13829 (_("%P: %B: %s is not supported for `%T'\n"),
13831 ppc64_elf_howto_table[r_type]->name, sym_name);
13833 bfd_set_error (bfd_error_invalid_operation);
13838 /* Multi-instruction sequences that access the TOC can be
13839 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13840 to nop; addi rb,r2,x; */
13846 case R_PPC64_GOT_TLSLD16_HI:
13847 case R_PPC64_GOT_TLSGD16_HI:
13848 case R_PPC64_GOT_TPREL16_HI:
13849 case R_PPC64_GOT_DTPREL16_HI:
13850 case R_PPC64_GOT16_HI:
13851 case R_PPC64_TOC16_HI:
13852 /* These relocs would only be useful if building up an
13853 offset to later add to r2, perhaps in an indexed
13854 addressing mode instruction. Don't try to optimize.
13855 Unfortunately, the possibility of someone building up an
13856 offset like this or even with the HA relocs, means that
13857 we need to check the high insn when optimizing the low
13861 case R_PPC64_GOT_TLSLD16_HA:
13862 case R_PPC64_GOT_TLSGD16_HA:
13863 case R_PPC64_GOT_TPREL16_HA:
13864 case R_PPC64_GOT_DTPREL16_HA:
13865 case R_PPC64_GOT16_HA:
13866 case R_PPC64_TOC16_HA:
13867 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13868 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13870 bfd_byte *p = contents + (rel->r_offset & ~3);
13871 bfd_put_32 (input_bfd, NOP, p);
13875 case R_PPC64_GOT_TLSLD16_LO:
13876 case R_PPC64_GOT_TLSGD16_LO:
13877 case R_PPC64_GOT_TPREL16_LO_DS:
13878 case R_PPC64_GOT_DTPREL16_LO_DS:
13879 case R_PPC64_GOT16_LO:
13880 case R_PPC64_GOT16_LO_DS:
13881 case R_PPC64_TOC16_LO:
13882 case R_PPC64_TOC16_LO_DS:
13883 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13884 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13886 bfd_byte *p = contents + (rel->r_offset & ~3);
13887 insn = bfd_get_32 (input_bfd, p);
13888 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13890 /* Transform addic to addi when we change reg. */
13891 insn &= ~((0x3f << 26) | (0x1f << 16));
13892 insn |= (14u << 26) | (2 << 16);
13896 insn &= ~(0x1f << 16);
13899 bfd_put_32 (input_bfd, insn, p);
13904 /* Do any further special processing. */
13910 case R_PPC64_ADDR16_HA:
13911 case R_PPC64_REL16_HA:
13912 case R_PPC64_ADDR16_HIGHERA:
13913 case R_PPC64_ADDR16_HIGHESTA:
13914 case R_PPC64_TOC16_HA:
13915 case R_PPC64_SECTOFF_HA:
13916 case R_PPC64_TPREL16_HA:
13917 case R_PPC64_DTPREL16_HA:
13918 case R_PPC64_TPREL16_HIGHER:
13919 case R_PPC64_TPREL16_HIGHERA:
13920 case R_PPC64_TPREL16_HIGHEST:
13921 case R_PPC64_TPREL16_HIGHESTA:
13922 case R_PPC64_DTPREL16_HIGHER:
13923 case R_PPC64_DTPREL16_HIGHERA:
13924 case R_PPC64_DTPREL16_HIGHEST:
13925 case R_PPC64_DTPREL16_HIGHESTA:
13926 /* It's just possible that this symbol is a weak symbol
13927 that's not actually defined anywhere. In that case,
13928 'sec' would be NULL, and we should leave the symbol
13929 alone (it will be set to zero elsewhere in the link). */
13934 case R_PPC64_GOT16_HA:
13935 case R_PPC64_PLTGOT16_HA:
13936 case R_PPC64_PLT16_HA:
13937 case R_PPC64_GOT_TLSGD16_HA:
13938 case R_PPC64_GOT_TLSLD16_HA:
13939 case R_PPC64_GOT_TPREL16_HA:
13940 case R_PPC64_GOT_DTPREL16_HA:
13941 /* Add 0x10000 if sign bit in 0:15 is set.
13942 Bits 0:15 are not used. */
13946 case R_PPC64_ADDR16_DS:
13947 case R_PPC64_ADDR16_LO_DS:
13948 case R_PPC64_GOT16_DS:
13949 case R_PPC64_GOT16_LO_DS:
13950 case R_PPC64_PLT16_LO_DS:
13951 case R_PPC64_SECTOFF_DS:
13952 case R_PPC64_SECTOFF_LO_DS:
13953 case R_PPC64_TOC16_DS:
13954 case R_PPC64_TOC16_LO_DS:
13955 case R_PPC64_PLTGOT16_DS:
13956 case R_PPC64_PLTGOT16_LO_DS:
13957 case R_PPC64_GOT_TPREL16_DS:
13958 case R_PPC64_GOT_TPREL16_LO_DS:
13959 case R_PPC64_GOT_DTPREL16_DS:
13960 case R_PPC64_GOT_DTPREL16_LO_DS:
13961 case R_PPC64_TPREL16_DS:
13962 case R_PPC64_TPREL16_LO_DS:
13963 case R_PPC64_DTPREL16_DS:
13964 case R_PPC64_DTPREL16_LO_DS:
13965 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13967 /* If this reloc is against an lq insn, then the value must be
13968 a multiple of 16. This is somewhat of a hack, but the
13969 "correct" way to do this by defining _DQ forms of all the
13970 _DS relocs bloats all reloc switches in this file. It
13971 doesn't seem to make much sense to use any of these relocs
13972 in data, so testing the insn should be safe. */
13973 if ((insn & (0x3f << 26)) == (56u << 26))
13975 if (((relocation + addend) & mask) != 0)
13977 info->callbacks->einfo
13978 (_("%P: %H: error: %s not a multiple of %u\n"),
13979 input_bfd, input_section, rel->r_offset,
13980 ppc64_elf_howto_table[r_type]->name,
13982 bfd_set_error (bfd_error_bad_value);
13989 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13990 because such sections are not SEC_ALLOC and thus ld.so will
13991 not process them. */
13992 if (unresolved_reloc
13993 && !((input_section->flags & SEC_DEBUGGING) != 0
13994 && h->elf.def_dynamic)
13995 && _bfd_elf_section_offset (output_bfd, info, input_section,
13996 rel->r_offset) != (bfd_vma) -1)
13998 info->callbacks->einfo
13999 (_("%P: %H: unresolvable %s against `%T'\n"),
14000 input_bfd, input_section, rel->r_offset,
14001 ppc64_elf_howto_table[(int) r_type]->name,
14002 h->elf.root.root.string);
14006 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
14014 if (r != bfd_reloc_ok)
14016 char *more_info = NULL;
14017 const char *reloc_name = ppc64_elf_howto_table[r_type]->name;
14019 if (reloc_dest != DEST_NORMAL)
14021 more_info = bfd_malloc (strlen (reloc_name) + 8);
14022 if (more_info != NULL)
14024 strcpy (more_info, reloc_name);
14025 strcat (more_info, (reloc_dest == DEST_OPD
14026 ? " (OPD)" : " (stub)"));
14027 reloc_name = more_info;
14031 if (r == bfd_reloc_overflow)
14036 && h->elf.root.type == bfd_link_hash_undefweak
14037 && ppc64_elf_howto_table[r_type]->pc_relative)
14039 /* Assume this is a call protected by other code that
14040 detects the symbol is undefined. If this is the case,
14041 we can safely ignore the overflow. If not, the
14042 program is hosed anyway, and a little warning isn't
14048 if (!((*info->callbacks->reloc_overflow)
14049 (info, &h->elf.root, sym_name,
14050 reloc_name, orig_rel.r_addend,
14051 input_bfd, input_section, rel->r_offset)))
14056 info->callbacks->einfo
14057 (_("%P: %H: %s against `%T': error %d\n"),
14058 input_bfd, input_section, rel->r_offset,
14059 reloc_name, sym_name, (int) r);
14062 if (more_info != NULL)
14067 /* If we're emitting relocations, then shortly after this function
14068 returns, reloc offsets and addends for this section will be
14069 adjusted. Worse, reloc symbol indices will be for the output
14070 file rather than the input. Save a copy of the relocs for
14071 opd_entry_value. */
14072 if (is_opd && (info->emitrelocations || info->relocatable))
14075 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14076 rel = bfd_alloc (input_bfd, amt);
14077 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
14078 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
14081 memcpy (rel, relocs, amt);
14086 /* Adjust the value of any local symbols in opd sections. */
14089 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14090 const char *name ATTRIBUTE_UNUSED,
14091 Elf_Internal_Sym *elfsym,
14092 asection *input_sec,
14093 struct elf_link_hash_entry *h)
14095 struct _opd_sec_data *opd;
14102 opd = get_opd_info (input_sec);
14103 if (opd == NULL || opd->adjust == NULL)
14106 value = elfsym->st_value - input_sec->output_offset;
14107 if (!info->relocatable)
14108 value -= input_sec->output_section->vma;
14110 adjust = opd->adjust[value / 8];
14114 elfsym->st_value += adjust;
14118 /* Finish up dynamic symbol handling. We set the contents of various
14119 dynamic sections here. */
14122 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14123 struct bfd_link_info *info,
14124 struct elf_link_hash_entry *h,
14125 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14127 struct ppc_link_hash_table *htab;
14128 struct plt_entry *ent;
14129 Elf_Internal_Rela rela;
14132 htab = ppc_hash_table (info);
14136 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14137 if (ent->plt.offset != (bfd_vma) -1)
14139 /* This symbol has an entry in the procedure linkage
14140 table. Set it up. */
14141 if (!htab->elf.dynamic_sections_created
14142 || h->dynindx == -1)
14144 BFD_ASSERT (h->type == STT_GNU_IFUNC
14146 && (h->root.type == bfd_link_hash_defined
14147 || h->root.type == bfd_link_hash_defweak));
14148 rela.r_offset = (htab->iplt->output_section->vma
14149 + htab->iplt->output_offset
14150 + ent->plt.offset);
14151 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14152 rela.r_addend = (h->root.u.def.value
14153 + h->root.u.def.section->output_offset
14154 + h->root.u.def.section->output_section->vma
14156 loc = (htab->reliplt->contents
14157 + (htab->reliplt->reloc_count++
14158 * sizeof (Elf64_External_Rela)));
14162 rela.r_offset = (htab->plt->output_section->vma
14163 + htab->plt->output_offset
14164 + ent->plt.offset);
14165 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14166 rela.r_addend = ent->addend;
14167 loc = (htab->relplt->contents
14168 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
14169 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
14171 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14176 /* This symbol needs a copy reloc. Set it up. */
14178 if (h->dynindx == -1
14179 || (h->root.type != bfd_link_hash_defined
14180 && h->root.type != bfd_link_hash_defweak)
14181 || htab->relbss == NULL)
14184 rela.r_offset = (h->root.u.def.value
14185 + h->root.u.def.section->output_section->vma
14186 + h->root.u.def.section->output_offset);
14187 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14189 loc = htab->relbss->contents;
14190 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14191 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14197 /* Used to decide how to sort relocs in an optimal manner for the
14198 dynamic linker, before writing them out. */
14200 static enum elf_reloc_type_class
14201 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14202 const asection *rel_sec,
14203 const Elf_Internal_Rela *rela)
14205 enum elf_ppc64_reloc_type r_type;
14206 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14208 if (rel_sec == htab->reliplt)
14209 return reloc_class_ifunc;
14211 r_type = ELF64_R_TYPE (rela->r_info);
14214 case R_PPC64_RELATIVE:
14215 return reloc_class_relative;
14216 case R_PPC64_JMP_SLOT:
14217 return reloc_class_plt;
14219 return reloc_class_copy;
14221 return reloc_class_normal;
14225 /* Finish up the dynamic sections. */
14228 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14229 struct bfd_link_info *info)
14231 struct ppc_link_hash_table *htab;
14235 htab = ppc_hash_table (info);
14239 dynobj = htab->elf.dynobj;
14240 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14242 if (htab->elf.dynamic_sections_created)
14244 Elf64_External_Dyn *dyncon, *dynconend;
14246 if (sdyn == NULL || htab->got == NULL)
14249 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14250 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14251 for (; dyncon < dynconend; dyncon++)
14253 Elf_Internal_Dyn dyn;
14256 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14263 case DT_PPC64_GLINK:
14265 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14266 /* We stupidly defined DT_PPC64_GLINK to be the start
14267 of glink rather than the first entry point, which is
14268 what ld.so needs, and now have a bigger stub to
14269 support automatic multiple TOCs. */
14270 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
14274 s = bfd_get_section_by_name (output_bfd, ".opd");
14277 dyn.d_un.d_ptr = s->vma;
14280 case DT_PPC64_OPDSZ:
14281 s = bfd_get_section_by_name (output_bfd, ".opd");
14284 dyn.d_un.d_val = s->size;
14289 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14294 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14298 dyn.d_un.d_val = htab->relplt->size;
14302 /* Don't count procedure linkage table relocs in the
14303 overall reloc count. */
14307 dyn.d_un.d_val -= s->size;
14311 /* We may not be using the standard ELF linker script.
14312 If .rela.plt is the first .rela section, we adjust
14313 DT_RELA to not include it. */
14317 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14319 dyn.d_un.d_ptr += s->size;
14323 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14327 if (htab->got != NULL && htab->got->size != 0)
14329 /* Fill in the first entry in the global offset table.
14330 We use it to hold the link-time TOCbase. */
14331 bfd_put_64 (output_bfd,
14332 elf_gp (output_bfd) + TOC_BASE_OFF,
14333 htab->got->contents);
14335 /* Set .got entry size. */
14336 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14339 if (htab->plt != NULL && htab->plt->size != 0)
14341 /* Set .plt entry size. */
14342 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14346 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14347 brlt ourselves if emitrelocations. */
14348 if (htab->brlt != NULL
14349 && htab->brlt->reloc_count != 0
14350 && !_bfd_elf_link_output_relocs (output_bfd,
14352 elf_section_data (htab->brlt)->rela.hdr,
14353 elf_section_data (htab->brlt)->relocs,
14357 if (htab->glink != NULL
14358 && htab->glink->reloc_count != 0
14359 && !_bfd_elf_link_output_relocs (output_bfd,
14361 elf_section_data (htab->glink)->rela.hdr,
14362 elf_section_data (htab->glink)->relocs,
14367 if (htab->glink_eh_frame != NULL
14368 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
14369 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14370 htab->glink_eh_frame,
14371 htab->glink_eh_frame->contents))
14374 /* We need to handle writing out multiple GOT sections ourselves,
14375 since we didn't add them to DYNOBJ. We know dynobj is the first
14377 while ((dynobj = dynobj->link_next) != NULL)
14381 if (!is_ppc64_elf (dynobj))
14384 s = ppc64_elf_tdata (dynobj)->got;
14387 && s->output_section != bfd_abs_section_ptr
14388 && !bfd_set_section_contents (output_bfd, s->output_section,
14389 s->contents, s->output_offset,
14392 s = ppc64_elf_tdata (dynobj)->relgot;
14395 && s->output_section != bfd_abs_section_ptr
14396 && !bfd_set_section_contents (output_bfd, s->output_section,
14397 s->contents, s->output_offset,
14405 #include "elf64-target.h"
14407 /* FreeBSD support */
14409 #undef TARGET_LITTLE_SYM
14410 #undef TARGET_LITTLE_NAME
14412 #undef TARGET_BIG_SYM
14413 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14414 #undef TARGET_BIG_NAME
14415 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14418 #define ELF_OSABI ELFOSABI_FREEBSD
14421 #define elf64_bed elf64_powerpc_fbsd_bed
14423 #include "elf64-target.h"