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_toc (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_toc (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_toc (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;
2618 /* A copy of relocs before they are modified for --emit-relocs. */
2619 Elf_Internal_Rela *opd_relocs;
2621 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2622 the reloc to be in the range -32768 to 32767. */
2623 unsigned int has_small_toc_reloc : 1;
2625 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2626 instruction not one we handle. */
2627 unsigned int unexpected_toc_insn : 1;
2630 #define ppc64_elf_tdata(bfd) \
2631 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2633 #define ppc64_tlsld_got(bfd) \
2634 (&ppc64_elf_tdata (bfd)->tlsld_got)
2636 #define is_ppc64_elf(bfd) \
2637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2638 && elf_object_id (bfd) == PPC64_ELF_DATA)
2640 /* Override the generic function because we store some extras. */
2643 ppc64_elf_mkobject (bfd *abfd)
2645 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2649 /* Fix bad default arch selected for a 64 bit input bfd when the
2650 default is 32 bit. */
2653 ppc64_elf_object_p (bfd *abfd)
2655 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2657 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2659 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2661 /* Relies on arch after 32 bit default being 64 bit default. */
2662 abfd->arch_info = abfd->arch_info->next;
2663 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2669 /* Support for core dump NOTE sections. */
2672 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2674 size_t offset, size;
2676 if (note->descsz != 504)
2680 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2683 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2689 /* Make a ".reg/999" section. */
2690 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2691 size, note->descpos + offset);
2695 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2697 if (note->descsz != 136)
2700 elf_tdata (abfd)->core_pid
2701 = bfd_get_32 (abfd, note->descdata + 24);
2702 elf_tdata (abfd)->core_program
2703 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2704 elf_tdata (abfd)->core_command
2705 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2711 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2724 va_start (ap, note_type);
2725 memset (data, 0, sizeof (data));
2726 strncpy (data + 40, va_arg (ap, const char *), 16);
2727 strncpy (data + 56, va_arg (ap, const char *), 80);
2729 return elfcore_write_note (abfd, buf, bufsiz,
2730 "CORE", note_type, data, sizeof (data));
2741 va_start (ap, note_type);
2742 memset (data, 0, 112);
2743 pid = va_arg (ap, long);
2744 bfd_put_32 (abfd, pid, data + 32);
2745 cursig = va_arg (ap, int);
2746 bfd_put_16 (abfd, cursig, data + 12);
2747 greg = va_arg (ap, const void *);
2748 memcpy (data + 112, greg, 384);
2749 memset (data + 496, 0, 8);
2751 return elfcore_write_note (abfd, buf, bufsiz,
2752 "CORE", note_type, data, sizeof (data));
2757 /* Add extra PPC sections. */
2759 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2761 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2762 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2766 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2767 { NULL, 0, 0, 0, 0 }
2770 enum _ppc64_sec_type {
2776 struct _ppc64_elf_section_data
2778 struct bfd_elf_section_data elf;
2782 /* An array with one entry for each opd function descriptor. */
2783 struct _opd_sec_data
2785 /* Points to the function code section for local opd entries. */
2786 asection **func_sec;
2788 /* After editing .opd, adjust references to opd local syms. */
2792 /* An array for toc sections, indexed by offset/8. */
2793 struct _toc_sec_data
2795 /* Specifies the relocation symbol index used at a given toc offset. */
2798 /* And the relocation addend. */
2803 enum _ppc64_sec_type sec_type:2;
2805 /* Flag set when small branches are detected. Used to
2806 select suitable defaults for the stub group size. */
2807 unsigned int has_14bit_branch:1;
2810 #define ppc64_elf_section_data(sec) \
2811 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2814 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2816 if (!sec->used_by_bfd)
2818 struct _ppc64_elf_section_data *sdata;
2819 bfd_size_type amt = sizeof (*sdata);
2821 sdata = bfd_zalloc (abfd, amt);
2824 sec->used_by_bfd = sdata;
2827 return _bfd_elf_new_section_hook (abfd, sec);
2830 static struct _opd_sec_data *
2831 get_opd_info (asection * sec)
2834 && ppc64_elf_section_data (sec) != NULL
2835 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2836 return &ppc64_elf_section_data (sec)->u.opd;
2840 /* Parameters for the qsort hook. */
2841 static bfd_boolean synthetic_relocatable;
2843 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2846 compare_symbols (const void *ap, const void *bp)
2848 const asymbol *a = * (const asymbol **) ap;
2849 const asymbol *b = * (const asymbol **) bp;
2851 /* Section symbols first. */
2852 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2854 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2857 /* then .opd symbols. */
2858 if (strcmp (a->section->name, ".opd") == 0
2859 && strcmp (b->section->name, ".opd") != 0)
2861 if (strcmp (a->section->name, ".opd") != 0
2862 && strcmp (b->section->name, ".opd") == 0)
2865 /* then other code symbols. */
2866 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 == (SEC_CODE | SEC_ALLOC)
2868 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 != (SEC_CODE | SEC_ALLOC))
2872 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 != (SEC_CODE | SEC_ALLOC)
2874 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2875 == (SEC_CODE | SEC_ALLOC))
2878 if (synthetic_relocatable)
2880 if (a->section->id < b->section->id)
2883 if (a->section->id > b->section->id)
2887 if (a->value + a->section->vma < b->value + b->section->vma)
2890 if (a->value + a->section->vma > b->value + b->section->vma)
2893 /* For syms with the same value, prefer strong dynamic global function
2894 syms over other syms. */
2895 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2898 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2901 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2904 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2907 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2910 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2913 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2916 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2922 /* Search SYMS for a symbol of the given VALUE. */
2925 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2933 mid = (lo + hi) >> 1;
2934 if (syms[mid]->value + syms[mid]->section->vma < value)
2936 else if (syms[mid]->value + syms[mid]->section->vma > value)
2946 mid = (lo + hi) >> 1;
2947 if (syms[mid]->section->id < id)
2949 else if (syms[mid]->section->id > id)
2951 else if (syms[mid]->value < value)
2953 else if (syms[mid]->value > value)
2963 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2965 bfd_vma vma = *(bfd_vma *) ptr;
2966 return ((section->flags & SEC_ALLOC) != 0
2967 && section->vma <= vma
2968 && vma < section->vma + section->size);
2971 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2972 entry syms. Also generate @plt symbols for the glink branch table. */
2975 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2976 long static_count, asymbol **static_syms,
2977 long dyn_count, asymbol **dyn_syms,
2984 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2986 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2991 opd = bfd_get_section_by_name (abfd, ".opd");
2995 symcount = static_count;
2997 symcount += dyn_count;
3001 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3005 if (!relocatable && static_count != 0 && dyn_count != 0)
3007 /* Use both symbol tables. */
3008 memcpy (syms, static_syms, static_count * sizeof (*syms));
3009 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3011 else if (!relocatable && static_count == 0)
3012 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3014 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3016 synthetic_relocatable = relocatable;
3017 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3019 if (!relocatable && symcount > 1)
3022 /* Trim duplicate syms, since we may have merged the normal and
3023 dynamic symbols. Actually, we only care about syms that have
3024 different values, so trim any with the same value. */
3025 for (i = 1, j = 1; i < symcount; ++i)
3026 if (syms[i - 1]->value + syms[i - 1]->section->vma
3027 != syms[i]->value + syms[i]->section->vma)
3028 syms[j++] = syms[i];
3033 if (strcmp (syms[i]->section->name, ".opd") == 0)
3037 for (; i < symcount; ++i)
3038 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3039 != (SEC_CODE | SEC_ALLOC))
3040 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3044 for (; i < symcount; ++i)
3045 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3049 for (; i < symcount; ++i)
3050 if (strcmp (syms[i]->section->name, ".opd") != 0)
3054 for (; i < symcount; ++i)
3055 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3056 != (SEC_CODE | SEC_ALLOC))
3064 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3069 if (opdsymend == secsymend)
3072 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3073 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3077 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3084 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3088 while (r < opd->relocation + relcount
3089 && r->address < syms[i]->value + opd->vma)
3092 if (r == opd->relocation + relcount)
3095 if (r->address != syms[i]->value + opd->vma)
3098 if (r->howto->type != R_PPC64_ADDR64)
3101 sym = *r->sym_ptr_ptr;
3102 if (!sym_exists_at (syms, opdsymend, symcount,
3103 sym->section->id, sym->value + r->addend))
3106 size += sizeof (asymbol);
3107 size += strlen (syms[i]->name) + 2;
3111 s = *ret = bfd_malloc (size);
3118 names = (char *) (s + count);
3120 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3124 while (r < opd->relocation + relcount
3125 && r->address < syms[i]->value + opd->vma)
3128 if (r == opd->relocation + relcount)
3131 if (r->address != syms[i]->value + opd->vma)
3134 if (r->howto->type != R_PPC64_ADDR64)
3137 sym = *r->sym_ptr_ptr;
3138 if (!sym_exists_at (syms, opdsymend, symcount,
3139 sym->section->id, sym->value + r->addend))
3144 s->flags |= BSF_SYNTHETIC;
3145 s->section = sym->section;
3146 s->value = sym->value + r->addend;
3149 len = strlen (syms[i]->name);
3150 memcpy (names, syms[i]->name, len + 1);
3152 /* Have udata.p point back to the original symbol this
3153 synthetic symbol was derived from. */
3154 s->udata.p = syms[i];
3161 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3165 bfd_vma glink_vma = 0, resolv_vma = 0;
3166 asection *dynamic, *glink = NULL, *relplt = NULL;
3169 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3173 free_contents_and_exit:
3181 for (i = secsymend; i < opdsymend; ++i)
3185 /* Ignore bogus symbols. */
3186 if (syms[i]->value > opd->size - 8)
3189 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3190 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3193 size += sizeof (asymbol);
3194 size += strlen (syms[i]->name) + 2;
3198 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3200 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3202 bfd_byte *dynbuf, *extdyn, *extdynend;
3204 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3206 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3207 goto free_contents_and_exit;
3209 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3210 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3213 extdynend = extdyn + dynamic->size;
3214 for (; extdyn < extdynend; extdyn += extdynsize)
3216 Elf_Internal_Dyn dyn;
3217 (*swap_dyn_in) (abfd, extdyn, &dyn);
3219 if (dyn.d_tag == DT_NULL)
3222 if (dyn.d_tag == DT_PPC64_GLINK)
3224 /* The first glink stub starts at offset 32; see comment in
3225 ppc64_elf_finish_dynamic_sections. */
3226 glink_vma = dyn.d_un.d_val + 32;
3227 /* The .glink section usually does not survive the final
3228 link; search for the section (usually .text) where the
3229 glink stubs now reside. */
3230 glink = bfd_sections_find_if (abfd, section_covers_vma,
3241 /* Determine __glink trampoline by reading the relative branch
3242 from the first glink stub. */
3244 if (bfd_get_section_contents (abfd, glink, buf,
3245 glink_vma + 4 - glink->vma, 4))
3247 unsigned int insn = bfd_get_32 (abfd, buf);
3249 if ((insn & ~0x3fffffc) == 0)
3250 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3254 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3256 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3259 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3260 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3261 goto free_contents_and_exit;
3263 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3264 size += plt_count * sizeof (asymbol);
3266 p = relplt->relocation;
3267 for (i = 0; i < plt_count; i++, p++)
3269 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3271 size += sizeof ("+0x") - 1 + 16;
3276 s = *ret = bfd_malloc (size);
3278 goto free_contents_and_exit;
3280 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3282 for (i = secsymend; i < opdsymend; ++i)
3286 if (syms[i]->value > opd->size - 8)
3289 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3290 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3294 asection *sec = abfd->sections;
3301 long mid = (lo + hi) >> 1;
3302 if (syms[mid]->section->vma < ent)
3304 else if (syms[mid]->section->vma > ent)
3308 sec = syms[mid]->section;
3313 if (lo >= hi && lo > codesecsym)
3314 sec = syms[lo - 1]->section;
3316 for (; sec != NULL; sec = sec->next)
3320 /* SEC_LOAD may not be set if SEC is from a separate debug
3322 if ((sec->flags & SEC_ALLOC) == 0)
3324 if ((sec->flags & SEC_CODE) != 0)
3327 s->flags |= BSF_SYNTHETIC;
3328 s->value = ent - s->section->vma;
3331 len = strlen (syms[i]->name);
3332 memcpy (names, syms[i]->name, len + 1);
3334 /* Have udata.p point back to the original symbol this
3335 synthetic symbol was derived from. */
3336 s->udata.p = syms[i];
3342 if (glink != NULL && relplt != NULL)
3346 /* Add a symbol for the main glink trampoline. */
3347 memset (s, 0, sizeof *s);
3349 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3351 s->value = resolv_vma - glink->vma;
3353 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3354 names += sizeof ("__glink_PLTresolve");
3359 /* FIXME: It would be very much nicer to put sym@plt on the
3360 stub rather than on the glink branch table entry. The
3361 objdump disassembler would then use a sensible symbol
3362 name on plt calls. The difficulty in doing so is
3363 a) finding the stubs, and,
3364 b) matching stubs against plt entries, and,
3365 c) there can be multiple stubs for a given plt entry.
3367 Solving (a) could be done by code scanning, but older
3368 ppc64 binaries used different stubs to current code.
3369 (b) is the tricky one since you need to known the toc
3370 pointer for at least one function that uses a pic stub to
3371 be able to calculate the plt address referenced.
3372 (c) means gdb would need to set multiple breakpoints (or
3373 find the glink branch itself) when setting breakpoints
3374 for pending shared library loads. */
3375 p = relplt->relocation;
3376 for (i = 0; i < plt_count; i++, p++)
3380 *s = **p->sym_ptr_ptr;
3381 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3382 we are defining a symbol, ensure one of them is set. */
3383 if ((s->flags & BSF_LOCAL) == 0)
3384 s->flags |= BSF_GLOBAL;
3385 s->flags |= BSF_SYNTHETIC;
3387 s->value = glink_vma - glink->vma;
3390 len = strlen ((*p->sym_ptr_ptr)->name);
3391 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3395 memcpy (names, "+0x", sizeof ("+0x") - 1);
3396 names += sizeof ("+0x") - 1;
3397 bfd_sprintf_vma (abfd, names, p->addend);
3398 names += strlen (names);
3400 memcpy (names, "@plt", sizeof ("@plt"));
3401 names += sizeof ("@plt");
3416 /* The following functions are specific to the ELF linker, while
3417 functions above are used generally. Those named ppc64_elf_* are
3418 called by the main ELF linker code. They appear in this file more
3419 or less in the order in which they are called. eg.
3420 ppc64_elf_check_relocs is called early in the link process,
3421 ppc64_elf_finish_dynamic_sections is one of the last functions
3424 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3425 functions have both a function code symbol and a function descriptor
3426 symbol. A call to foo in a relocatable object file looks like:
3433 The function definition in another object file might be:
3437 . .quad .TOC.@tocbase
3443 When the linker resolves the call during a static link, the branch
3444 unsurprisingly just goes to .foo and the .opd information is unused.
3445 If the function definition is in a shared library, things are a little
3446 different: The call goes via a plt call stub, the opd information gets
3447 copied to the plt, and the linker patches the nop.
3455 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3456 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3457 . std 2,40(1) # this is the general idea
3465 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3467 The "reloc ()" notation is supposed to indicate that the linker emits
3468 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3471 What are the difficulties here? Well, firstly, the relocations
3472 examined by the linker in check_relocs are against the function code
3473 sym .foo, while the dynamic relocation in the plt is emitted against
3474 the function descriptor symbol, foo. Somewhere along the line, we need
3475 to carefully copy dynamic link information from one symbol to the other.
3476 Secondly, the generic part of the elf linker will make .foo a dynamic
3477 symbol as is normal for most other backends. We need foo dynamic
3478 instead, at least for an application final link. However, when
3479 creating a shared library containing foo, we need to have both symbols
3480 dynamic so that references to .foo are satisfied during the early
3481 stages of linking. Otherwise the linker might decide to pull in a
3482 definition from some other object, eg. a static library.
3484 Update: As of August 2004, we support a new convention. Function
3485 calls may use the function descriptor symbol, ie. "bl foo". This
3486 behaves exactly as "bl .foo". */
3488 /* Of those relocs that might be copied as dynamic relocs, this function
3489 selects those that must be copied when linking a shared library,
3490 even when the symbol is local. */
3493 must_be_dyn_reloc (struct bfd_link_info *info,
3494 enum elf_ppc64_reloc_type r_type)
3506 case R_PPC64_TPREL16:
3507 case R_PPC64_TPREL16_LO:
3508 case R_PPC64_TPREL16_HI:
3509 case R_PPC64_TPREL16_HA:
3510 case R_PPC64_TPREL16_DS:
3511 case R_PPC64_TPREL16_LO_DS:
3512 case R_PPC64_TPREL16_HIGHER:
3513 case R_PPC64_TPREL16_HIGHERA:
3514 case R_PPC64_TPREL16_HIGHEST:
3515 case R_PPC64_TPREL16_HIGHESTA:
3516 case R_PPC64_TPREL64:
3517 return !info->executable;
3521 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3522 copying dynamic variables from a shared lib into an app's dynbss
3523 section, and instead use a dynamic relocation to point into the
3524 shared lib. With code that gcc generates, it's vital that this be
3525 enabled; In the PowerPC64 ABI, the address of a function is actually
3526 the address of a function descriptor, which resides in the .opd
3527 section. gcc uses the descriptor directly rather than going via the
3528 GOT as some other ABI's do, which means that initialized function
3529 pointers must reference the descriptor. Thus, a function pointer
3530 initialized to the address of a function in a shared library will
3531 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3532 redefines the function descriptor symbol to point to the copy. This
3533 presents a problem as a plt entry for that function is also
3534 initialized from the function descriptor symbol and the copy reloc
3535 may not be initialized first. */
3536 #define ELIMINATE_COPY_RELOCS 1
3538 /* Section name for stubs is the associated section name plus this
3540 #define STUB_SUFFIX ".stub"
3543 ppc_stub_long_branch:
3544 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3545 destination, but a 24 bit branch in a stub section will reach.
3548 ppc_stub_plt_branch:
3549 Similar to the above, but a 24 bit branch in the stub section won't
3550 reach its destination.
3551 . addis %r12,%r2,xxx@toc@ha
3552 . ld %r11,xxx@toc@l(%r12)
3557 Used to call a function in a shared library. If it so happens that
3558 the plt entry referenced crosses a 64k boundary, then an extra
3559 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3560 . addis %r12,%r2,xxx@toc@ha
3562 . ld %r11,xxx+0@toc@l(%r12)
3564 . ld %r2,xxx+8@toc@l(%r12)
3565 . ld %r11,xxx+16@toc@l(%r12)
3568 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3569 code to adjust the value and save r2 to support multiple toc sections.
3570 A ppc_stub_long_branch with an r2 offset looks like:
3572 . addis %r2,%r2,off@ha
3573 . addi %r2,%r2,off@l
3576 A ppc_stub_plt_branch with an r2 offset looks like:
3578 . addis %r12,%r2,xxx@toc@ha
3579 . ld %r11,xxx@toc@l(%r12)
3580 . addis %r2,%r2,off@ha
3581 . addi %r2,%r2,off@l
3585 In cases where the "addis" instruction would add zero, the "addis" is
3586 omitted and following instructions modified slightly in some cases.
3589 enum ppc_stub_type {
3591 ppc_stub_long_branch,
3592 ppc_stub_long_branch_r2off,
3593 ppc_stub_plt_branch,
3594 ppc_stub_plt_branch_r2off,
3596 ppc_stub_plt_call_r2save
3599 struct ppc_stub_hash_entry {
3601 /* Base hash table entry structure. */
3602 struct bfd_hash_entry root;
3604 enum ppc_stub_type stub_type;
3606 /* The stub section. */
3609 /* Offset within stub_sec of the beginning of this stub. */
3610 bfd_vma stub_offset;
3612 /* Given the symbol's value and its section we can determine its final
3613 value when building the stubs (so the stub knows where to jump. */
3614 bfd_vma target_value;
3615 asection *target_section;
3617 /* The symbol table entry, if any, that this was derived from. */
3618 struct ppc_link_hash_entry *h;
3619 struct plt_entry *plt_ent;
3621 /* And the reloc addend that this was derived from. */
3624 /* Where this stub is being called from, or, in the case of combined
3625 stub sections, the first input section in the group. */
3629 struct ppc_branch_hash_entry {
3631 /* Base hash table entry structure. */
3632 struct bfd_hash_entry root;
3634 /* Offset within branch lookup table. */
3635 unsigned int offset;
3637 /* Generation marker. */
3641 struct ppc_link_hash_entry
3643 struct elf_link_hash_entry elf;
3646 /* A pointer to the most recently used stub hash entry against this
3648 struct ppc_stub_hash_entry *stub_cache;
3650 /* A pointer to the next symbol starting with a '.' */
3651 struct ppc_link_hash_entry *next_dot_sym;
3654 /* Track dynamic relocs copied for this symbol. */
3655 struct elf_dyn_relocs *dyn_relocs;
3657 /* Link between function code and descriptor symbols. */
3658 struct ppc_link_hash_entry *oh;
3660 /* Flag function code and descriptor symbols. */
3661 unsigned int is_func:1;
3662 unsigned int is_func_descriptor:1;
3663 unsigned int fake:1;
3665 /* Whether global opd/toc sym has been adjusted or not.
3666 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3667 should be set for all globals defined in any opd/toc section. */
3668 unsigned int adjust_done:1;
3670 /* Set if we twiddled this symbol to weak at some stage. */
3671 unsigned int was_undefined:1;
3673 /* Contexts in which symbol is used in the GOT (or TOC).
3674 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3675 corresponding relocs are encountered during check_relocs.
3676 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3677 indicate the corresponding GOT entry type is not needed.
3678 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3679 a TPREL one. We use a separate flag rather than setting TPREL
3680 just for convenience in distinguishing the two cases. */
3681 #define TLS_GD 1 /* GD reloc. */
3682 #define TLS_LD 2 /* LD reloc. */
3683 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3684 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3685 #define TLS_TLS 16 /* Any TLS reloc. */
3686 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3687 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3688 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3689 unsigned char tls_mask;
3692 /* ppc64 ELF linker hash table. */
3694 struct ppc_link_hash_table
3696 struct elf_link_hash_table elf;
3698 /* The stub hash table. */
3699 struct bfd_hash_table stub_hash_table;
3701 /* Another hash table for plt_branch stubs. */
3702 struct bfd_hash_table branch_hash_table;
3704 /* Hash table for function prologue tocsave. */
3705 htab_t tocsave_htab;
3707 /* Linker stub bfd. */
3710 /* Linker call-backs. */
3711 asection * (*add_stub_section) (const char *, asection *);
3712 void (*layout_sections_again) (void);
3714 /* Array to keep track of which stub sections have been created, and
3715 information on stub grouping. */
3717 /* This is the section to which stubs in the group will be attached. */
3719 /* The stub section. */
3721 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3725 /* Temp used when calculating TOC pointers. */
3728 asection *toc_first_sec;
3730 /* Highest input section id. */
3733 /* Highest output section index. */
3736 /* Used when adding symbols. */
3737 struct ppc_link_hash_entry *dot_syms;
3739 /* List of input sections for each output section. */
3740 asection **input_list;
3742 /* Short-cuts to get to dynamic linker sections. */
3754 asection *glink_eh_frame;
3756 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3757 struct ppc_link_hash_entry *tls_get_addr;
3758 struct ppc_link_hash_entry *tls_get_addr_fd;
3760 /* The special .TOC. symbol. */
3761 struct ppc_link_hash_entry *dot_toc_dot;
3763 /* The size of reliplt used by got entry relocs. */
3764 bfd_size_type got_reli_size;
3767 unsigned long stub_count[ppc_stub_plt_call_r2save];
3769 /* Number of stubs against global syms. */
3770 unsigned long stub_globals;
3772 /* Alignment of PLT call stubs. */
3773 unsigned int plt_stub_align:4;
3775 /* Set if PLT call stubs should load r11. */
3776 unsigned int plt_static_chain:1;
3778 /* Set if PLT call stubs need a read-read barrier. */
3779 unsigned int plt_thread_safe:1;
3781 /* Set if we should emit symbols for stubs. */
3782 unsigned int emit_stub_syms:1;
3784 /* Set if __tls_get_addr optimization should not be done. */
3785 unsigned int no_tls_get_addr_opt:1;
3787 /* Support for multiple toc sections. */
3788 unsigned int do_multi_toc:1;
3789 unsigned int multi_toc_needed:1;
3790 unsigned int second_toc_pass:1;
3791 unsigned int do_toc_opt:1;
3794 unsigned int stub_error:1;
3796 /* Temp used by ppc64_elf_process_dot_syms. */
3797 unsigned int twiddled_syms:1;
3799 /* Incremented every time we size stubs. */
3800 unsigned int stub_iteration;
3802 /* Small local sym cache. */
3803 struct sym_cache sym_cache;
3806 /* Rename some of the generic section flags to better document how they
3809 /* Nonzero if this section has TLS related relocations. */
3810 #define has_tls_reloc sec_flg0
3812 /* Nonzero if this section has a call to __tls_get_addr. */
3813 #define has_tls_get_addr_call sec_flg1
3815 /* Nonzero if this section has any toc or got relocs. */
3816 #define has_toc_reloc sec_flg2
3818 /* Nonzero if this section has a call to another section that uses
3820 #define makes_toc_func_call sec_flg3
3822 /* Recursion protection when determining above flag. */
3823 #define call_check_in_progress sec_flg4
3824 #define call_check_done sec_flg5
3826 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3828 #define ppc_hash_table(p) \
3829 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3830 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3832 #define ppc_stub_hash_lookup(table, string, create, copy) \
3833 ((struct ppc_stub_hash_entry *) \
3834 bfd_hash_lookup ((table), (string), (create), (copy)))
3836 #define ppc_branch_hash_lookup(table, string, create, copy) \
3837 ((struct ppc_branch_hash_entry *) \
3838 bfd_hash_lookup ((table), (string), (create), (copy)))
3840 /* Create an entry in the stub hash table. */
3842 static struct bfd_hash_entry *
3843 stub_hash_newfunc (struct bfd_hash_entry *entry,
3844 struct bfd_hash_table *table,
3847 /* Allocate the structure if it has not already been allocated by a
3851 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3856 /* Call the allocation method of the superclass. */
3857 entry = bfd_hash_newfunc (entry, table, string);
3860 struct ppc_stub_hash_entry *eh;
3862 /* Initialize the local fields. */
3863 eh = (struct ppc_stub_hash_entry *) entry;
3864 eh->stub_type = ppc_stub_none;
3865 eh->stub_sec = NULL;
3866 eh->stub_offset = 0;
3867 eh->target_value = 0;
3868 eh->target_section = NULL;
3876 /* Create an entry in the branch hash table. */
3878 static struct bfd_hash_entry *
3879 branch_hash_newfunc (struct bfd_hash_entry *entry,
3880 struct bfd_hash_table *table,
3883 /* Allocate the structure if it has not already been allocated by a
3887 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3892 /* Call the allocation method of the superclass. */
3893 entry = bfd_hash_newfunc (entry, table, string);
3896 struct ppc_branch_hash_entry *eh;
3898 /* Initialize the local fields. */
3899 eh = (struct ppc_branch_hash_entry *) entry;
3907 /* Create an entry in a ppc64 ELF linker hash table. */
3909 static struct bfd_hash_entry *
3910 link_hash_newfunc (struct bfd_hash_entry *entry,
3911 struct bfd_hash_table *table,
3914 /* Allocate the structure if it has not already been allocated by a
3918 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3923 /* Call the allocation method of the superclass. */
3924 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3927 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3929 memset (&eh->u.stub_cache, 0,
3930 (sizeof (struct ppc_link_hash_entry)
3931 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3933 /* When making function calls, old ABI code references function entry
3934 points (dot symbols), while new ABI code references the function
3935 descriptor symbol. We need to make any combination of reference and
3936 definition work together, without breaking archive linking.
3938 For a defined function "foo" and an undefined call to "bar":
3939 An old object defines "foo" and ".foo", references ".bar" (possibly
3941 A new object defines "foo" and references "bar".
3943 A new object thus has no problem with its undefined symbols being
3944 satisfied by definitions in an old object. On the other hand, the
3945 old object won't have ".bar" satisfied by a new object.
3947 Keep a list of newly added dot-symbols. */
3949 if (string[0] == '.')
3951 struct ppc_link_hash_table *htab;
3953 htab = (struct ppc_link_hash_table *) table;
3954 eh->u.next_dot_sym = htab->dot_syms;
3955 htab->dot_syms = eh;
3962 struct tocsave_entry {
3968 tocsave_htab_hash (const void *p)
3970 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3971 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
3975 tocsave_htab_eq (const void *p1, const void *p2)
3977 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3978 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3979 return e1->sec == e2->sec && e1->offset == e2->offset;
3982 /* Create a ppc64 ELF linker hash table. */
3984 static struct bfd_link_hash_table *
3985 ppc64_elf_link_hash_table_create (bfd *abfd)
3987 struct ppc_link_hash_table *htab;
3988 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3990 htab = bfd_zmalloc (amt);
3994 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3995 sizeof (struct ppc_link_hash_entry),
4002 /* Init the stub hash table too. */
4003 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4004 sizeof (struct ppc_stub_hash_entry)))
4007 /* And the branch hash table. */
4008 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4009 sizeof (struct ppc_branch_hash_entry)))
4012 htab->tocsave_htab = htab_try_create (1024,
4016 if (htab->tocsave_htab == NULL)
4019 /* Initializing two fields of the union is just cosmetic. We really
4020 only care about glist, but when compiled on a 32-bit host the
4021 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4022 debugger inspection of these fields look nicer. */
4023 htab->elf.init_got_refcount.refcount = 0;
4024 htab->elf.init_got_refcount.glist = NULL;
4025 htab->elf.init_plt_refcount.refcount = 0;
4026 htab->elf.init_plt_refcount.glist = NULL;
4027 htab->elf.init_got_offset.offset = 0;
4028 htab->elf.init_got_offset.glist = NULL;
4029 htab->elf.init_plt_offset.offset = 0;
4030 htab->elf.init_plt_offset.glist = NULL;
4032 return &htab->elf.root;
4035 /* Free the derived linker hash table. */
4038 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4040 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4042 bfd_hash_table_free (&htab->stub_hash_table);
4043 bfd_hash_table_free (&htab->branch_hash_table);
4044 if (htab->tocsave_htab)
4045 htab_delete (htab->tocsave_htab);
4046 _bfd_generic_link_hash_table_free (hash);
4049 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4052 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4054 struct ppc_link_hash_table *htab;
4056 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4058 /* Always hook our dynamic sections into the first bfd, which is the
4059 linker created stub bfd. This ensures that the GOT header is at
4060 the start of the output TOC section. */
4061 htab = ppc_hash_table (info);
4064 htab->stub_bfd = abfd;
4065 htab->elf.dynobj = abfd;
4068 /* Build a name for an entry in the stub hash table. */
4071 ppc_stub_name (const asection *input_section,
4072 const asection *sym_sec,
4073 const struct ppc_link_hash_entry *h,
4074 const Elf_Internal_Rela *rel)
4079 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4080 offsets from a sym as a branch target? In fact, we could
4081 probably assume the addend is always zero. */
4082 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4086 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4087 stub_name = bfd_malloc (len);
4088 if (stub_name == NULL)
4091 len = sprintf (stub_name, "%08x.%s+%x",
4092 input_section->id & 0xffffffff,
4093 h->elf.root.root.string,
4094 (int) rel->r_addend & 0xffffffff);
4098 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4099 stub_name = bfd_malloc (len);
4100 if (stub_name == NULL)
4103 len = sprintf (stub_name, "%08x.%x:%x+%x",
4104 input_section->id & 0xffffffff,
4105 sym_sec->id & 0xffffffff,
4106 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4107 (int) rel->r_addend & 0xffffffff);
4109 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4110 stub_name[len - 2] = 0;
4114 /* Look up an entry in the stub hash. Stub entries are cached because
4115 creating the stub name takes a bit of time. */
4117 static struct ppc_stub_hash_entry *
4118 ppc_get_stub_entry (const asection *input_section,
4119 const asection *sym_sec,
4120 struct ppc_link_hash_entry *h,
4121 const Elf_Internal_Rela *rel,
4122 struct ppc_link_hash_table *htab)
4124 struct ppc_stub_hash_entry *stub_entry;
4125 const asection *id_sec;
4127 /* If this input section is part of a group of sections sharing one
4128 stub section, then use the id of the first section in the group.
4129 Stub names need to include a section id, as there may well be
4130 more than one stub used to reach say, printf, and we need to
4131 distinguish between them. */
4132 id_sec = htab->stub_group[input_section->id].link_sec;
4134 if (h != NULL && h->u.stub_cache != NULL
4135 && h->u.stub_cache->h == h
4136 && h->u.stub_cache->id_sec == id_sec)
4138 stub_entry = h->u.stub_cache;
4144 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4145 if (stub_name == NULL)
4148 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4149 stub_name, FALSE, FALSE);
4151 h->u.stub_cache = stub_entry;
4159 /* Add a new stub entry to the stub hash. Not all fields of the new
4160 stub entry are initialised. */
4162 static struct ppc_stub_hash_entry *
4163 ppc_add_stub (const char *stub_name,
4165 struct bfd_link_info *info)
4167 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4170 struct ppc_stub_hash_entry *stub_entry;
4172 link_sec = htab->stub_group[section->id].link_sec;
4173 stub_sec = htab->stub_group[section->id].stub_sec;
4174 if (stub_sec == NULL)
4176 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4177 if (stub_sec == NULL)
4183 namelen = strlen (link_sec->name);
4184 len = namelen + sizeof (STUB_SUFFIX);
4185 s_name = bfd_alloc (htab->stub_bfd, len);
4189 memcpy (s_name, link_sec->name, namelen);
4190 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4191 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4192 if (stub_sec == NULL)
4194 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4196 htab->stub_group[section->id].stub_sec = stub_sec;
4199 /* Enter this entry into the linker stub hash table. */
4200 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4202 if (stub_entry == NULL)
4204 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4205 section->owner, stub_name);
4209 stub_entry->stub_sec = stub_sec;
4210 stub_entry->stub_offset = 0;
4211 stub_entry->id_sec = link_sec;
4215 /* Create sections for linker generated code. */
4218 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4220 struct ppc_link_hash_table *htab;
4223 htab = ppc_hash_table (info);
4227 /* Create .sfpr for code to save and restore fp regs. */
4228 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4229 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4230 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4232 if (htab->sfpr == NULL
4233 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4236 /* Create .glink for lazy dynamic linking support. */
4237 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4239 if (htab->glink == NULL
4240 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4243 if (!info->no_ld_generated_unwind_info)
4245 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4246 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4247 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4250 if (htab->glink_eh_frame == NULL
4251 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4255 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4256 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4257 if (htab->iplt == NULL
4258 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4261 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4262 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4263 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4266 if (htab->reliplt == NULL
4267 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4270 /* Create branch lookup table for plt_branch stubs. */
4271 flags = (SEC_ALLOC | SEC_LOAD
4272 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4273 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4275 if (htab->brlt == NULL
4276 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4282 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4283 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4284 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4287 if (htab->relbrlt == NULL
4288 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4294 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4295 not already done. */
4298 create_got_section (bfd *abfd, struct bfd_link_info *info)
4300 asection *got, *relgot;
4302 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4304 if (!is_ppc64_elf (abfd))
4311 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4314 htab->got = bfd_get_linker_section (htab->elf.dynobj, ".got");
4319 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4320 | SEC_LINKER_CREATED);
4322 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4324 || !bfd_set_section_alignment (abfd, got, 3))
4327 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4328 flags | SEC_READONLY);
4330 || ! bfd_set_section_alignment (abfd, relgot, 3))
4333 ppc64_elf_tdata (abfd)->got = got;
4334 ppc64_elf_tdata (abfd)->relgot = relgot;
4338 /* Create the dynamic sections, and set up shortcuts. */
4341 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4343 struct ppc_link_hash_table *htab;
4345 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4348 htab = ppc_hash_table (info);
4353 htab->got = bfd_get_linker_section (dynobj, ".got");
4354 htab->plt = bfd_get_linker_section (dynobj, ".plt");
4355 htab->relplt = bfd_get_linker_section (dynobj, ".rela.plt");
4356 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4358 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4360 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4361 || (!info->shared && !htab->relbss))
4367 /* Follow indirect and warning symbol links. */
4369 static inline struct bfd_link_hash_entry *
4370 follow_link (struct bfd_link_hash_entry *h)
4372 while (h->type == bfd_link_hash_indirect
4373 || h->type == bfd_link_hash_warning)
4378 static inline struct elf_link_hash_entry *
4379 elf_follow_link (struct elf_link_hash_entry *h)
4381 return (struct elf_link_hash_entry *) follow_link (&h->root);
4384 static inline struct ppc_link_hash_entry *
4385 ppc_follow_link (struct ppc_link_hash_entry *h)
4387 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4390 /* Merge PLT info on FROM with that on TO. */
4393 move_plt_plist (struct ppc_link_hash_entry *from,
4394 struct ppc_link_hash_entry *to)
4396 if (from->elf.plt.plist != NULL)
4398 if (to->elf.plt.plist != NULL)
4400 struct plt_entry **entp;
4401 struct plt_entry *ent;
4403 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4405 struct plt_entry *dent;
4407 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4408 if (dent->addend == ent->addend)
4410 dent->plt.refcount += ent->plt.refcount;
4417 *entp = to->elf.plt.plist;
4420 to->elf.plt.plist = from->elf.plt.plist;
4421 from->elf.plt.plist = NULL;
4425 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4428 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4429 struct elf_link_hash_entry *dir,
4430 struct elf_link_hash_entry *ind)
4432 struct ppc_link_hash_entry *edir, *eind;
4434 edir = (struct ppc_link_hash_entry *) dir;
4435 eind = (struct ppc_link_hash_entry *) ind;
4437 edir->is_func |= eind->is_func;
4438 edir->is_func_descriptor |= eind->is_func_descriptor;
4439 edir->tls_mask |= eind->tls_mask;
4440 if (eind->oh != NULL)
4441 edir->oh = ppc_follow_link (eind->oh);
4443 /* If called to transfer flags for a weakdef during processing
4444 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4445 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4446 if (!(ELIMINATE_COPY_RELOCS
4447 && eind->elf.root.type != bfd_link_hash_indirect
4448 && edir->elf.dynamic_adjusted))
4449 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4451 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4452 edir->elf.ref_regular |= eind->elf.ref_regular;
4453 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4454 edir->elf.needs_plt |= eind->elf.needs_plt;
4456 /* Copy over any dynamic relocs we may have on the indirect sym. */
4457 if (eind->dyn_relocs != NULL)
4459 if (edir->dyn_relocs != NULL)
4461 struct elf_dyn_relocs **pp;
4462 struct elf_dyn_relocs *p;
4464 /* Add reloc counts against the indirect sym to the direct sym
4465 list. Merge any entries against the same section. */
4466 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4468 struct elf_dyn_relocs *q;
4470 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4471 if (q->sec == p->sec)
4473 q->pc_count += p->pc_count;
4474 q->count += p->count;
4481 *pp = edir->dyn_relocs;
4484 edir->dyn_relocs = eind->dyn_relocs;
4485 eind->dyn_relocs = NULL;
4488 /* If we were called to copy over info for a weak sym, that's all.
4489 You might think dyn_relocs need not be copied over; After all,
4490 both syms will be dynamic or both non-dynamic so we're just
4491 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4492 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4493 dyn_relocs in read-only sections, and it does so on what is the
4495 if (eind->elf.root.type != bfd_link_hash_indirect)
4498 /* Copy over got entries that we may have already seen to the
4499 symbol which just became indirect. */
4500 if (eind->elf.got.glist != NULL)
4502 if (edir->elf.got.glist != NULL)
4504 struct got_entry **entp;
4505 struct got_entry *ent;
4507 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4509 struct got_entry *dent;
4511 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4512 if (dent->addend == ent->addend
4513 && dent->owner == ent->owner
4514 && dent->tls_type == ent->tls_type)
4516 dent->got.refcount += ent->got.refcount;
4523 *entp = edir->elf.got.glist;
4526 edir->elf.got.glist = eind->elf.got.glist;
4527 eind->elf.got.glist = NULL;
4530 /* And plt entries. */
4531 move_plt_plist (eind, edir);
4533 if (eind->elf.dynindx != -1)
4535 if (edir->elf.dynindx != -1)
4536 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4537 edir->elf.dynstr_index);
4538 edir->elf.dynindx = eind->elf.dynindx;
4539 edir->elf.dynstr_index = eind->elf.dynstr_index;
4540 eind->elf.dynindx = -1;
4541 eind->elf.dynstr_index = 0;
4545 /* Find the function descriptor hash entry from the given function code
4546 hash entry FH. Link the entries via their OH fields. */
4548 static struct ppc_link_hash_entry *
4549 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4551 struct ppc_link_hash_entry *fdh = fh->oh;
4555 const char *fd_name = fh->elf.root.root.string + 1;
4557 fdh = (struct ppc_link_hash_entry *)
4558 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4562 fdh->is_func_descriptor = 1;
4568 return ppc_follow_link (fdh);
4571 /* Make a fake function descriptor sym for the code sym FH. */
4573 static struct ppc_link_hash_entry *
4574 make_fdh (struct bfd_link_info *info,
4575 struct ppc_link_hash_entry *fh)
4579 struct bfd_link_hash_entry *bh;
4580 struct ppc_link_hash_entry *fdh;
4582 abfd = fh->elf.root.u.undef.abfd;
4583 newsym = bfd_make_empty_symbol (abfd);
4584 newsym->name = fh->elf.root.root.string + 1;
4585 newsym->section = bfd_und_section_ptr;
4587 newsym->flags = BSF_WEAK;
4590 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4591 newsym->flags, newsym->section,
4592 newsym->value, NULL, FALSE, FALSE,
4596 fdh = (struct ppc_link_hash_entry *) bh;
4597 fdh->elf.non_elf = 0;
4599 fdh->is_func_descriptor = 1;
4606 /* Fix function descriptor symbols defined in .opd sections to be
4610 ppc64_elf_add_symbol_hook (bfd *ibfd,
4611 struct bfd_link_info *info,
4612 Elf_Internal_Sym *isym,
4613 const char **name ATTRIBUTE_UNUSED,
4614 flagword *flags ATTRIBUTE_UNUSED,
4616 bfd_vma *value ATTRIBUTE_UNUSED)
4618 if ((ibfd->flags & DYNAMIC) == 0
4619 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4620 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4622 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4624 if ((ibfd->flags & DYNAMIC) == 0)
4625 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4627 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4629 else if (*sec != NULL
4630 && strcmp ((*sec)->name, ".opd") == 0)
4631 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4636 /* This function makes an old ABI object reference to ".bar" cause the
4637 inclusion of a new ABI object archive that defines "bar".
4638 NAME is a symbol defined in an archive. Return a symbol in the hash
4639 table that might be satisfied by the archive symbols. */
4641 static struct elf_link_hash_entry *
4642 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4643 struct bfd_link_info *info,
4646 struct elf_link_hash_entry *h;
4650 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4652 /* Don't return this sym if it is a fake function descriptor
4653 created by add_symbol_adjust. */
4654 && !(h->root.type == bfd_link_hash_undefweak
4655 && ((struct ppc_link_hash_entry *) h)->fake))
4661 len = strlen (name);
4662 dot_name = bfd_alloc (abfd, len + 2);
4663 if (dot_name == NULL)
4664 return (struct elf_link_hash_entry *) 0 - 1;
4666 memcpy (dot_name + 1, name, len + 1);
4667 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4668 bfd_release (abfd, dot_name);
4672 /* This function satisfies all old ABI object references to ".bar" if a
4673 new ABI object defines "bar". Well, at least, undefined dot symbols
4674 are made weak. This stops later archive searches from including an
4675 object if we already have a function descriptor definition. It also
4676 prevents the linker complaining about undefined symbols.
4677 We also check and correct mismatched symbol visibility here. The
4678 most restrictive visibility of the function descriptor and the
4679 function entry symbol is used. */
4682 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4684 struct ppc_link_hash_table *htab;
4685 struct ppc_link_hash_entry *fdh;
4687 if (eh->elf.root.type == bfd_link_hash_indirect)
4690 if (eh->elf.root.type == bfd_link_hash_warning)
4691 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4693 if (eh->elf.root.root.string[0] != '.')
4696 htab = ppc_hash_table (info);
4700 fdh = lookup_fdh (eh, htab);
4703 if (!info->relocatable
4704 && (eh->elf.root.type == bfd_link_hash_undefined
4705 || eh->elf.root.type == bfd_link_hash_undefweak)
4706 && eh->elf.ref_regular)
4708 /* Make an undefweak function descriptor sym, which is enough to
4709 pull in an --as-needed shared lib, but won't cause link
4710 errors. Archives are handled elsewhere. */
4711 fdh = make_fdh (info, eh);
4714 fdh->elf.ref_regular = 1;
4719 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4720 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4721 if (entry_vis < descr_vis)
4722 fdh->elf.other += entry_vis - descr_vis;
4723 else if (entry_vis > descr_vis)
4724 eh->elf.other += descr_vis - entry_vis;
4726 if ((fdh->elf.root.type == bfd_link_hash_defined
4727 || fdh->elf.root.type == bfd_link_hash_defweak)
4728 && eh->elf.root.type == bfd_link_hash_undefined)
4730 eh->elf.root.type = bfd_link_hash_undefweak;
4731 eh->was_undefined = 1;
4732 htab->twiddled_syms = 1;
4739 /* Process list of dot-symbols we made in link_hash_newfunc. */
4742 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4744 struct ppc_link_hash_table *htab;
4745 struct ppc_link_hash_entry **p, *eh;
4747 if (!is_ppc64_elf (info->output_bfd))
4749 htab = ppc_hash_table (info);
4753 if (is_ppc64_elf (ibfd))
4755 p = &htab->dot_syms;
4756 while ((eh = *p) != NULL)
4759 if (!add_symbol_adjust (eh, info))
4761 p = &eh->u.next_dot_sym;
4765 /* Clear the list for non-ppc64 input files. */
4766 p = &htab->dot_syms;
4767 while ((eh = *p) != NULL)
4770 p = &eh->u.next_dot_sym;
4773 /* We need to fix the undefs list for any syms we have twiddled to
4775 if (htab->twiddled_syms)
4777 bfd_link_repair_undef_list (&htab->elf.root);
4778 htab->twiddled_syms = 0;
4783 /* Undo hash table changes when an --as-needed input file is determined
4784 not to be needed. */
4787 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4788 struct bfd_link_info *info)
4790 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4795 htab->dot_syms = NULL;
4799 /* If --just-symbols against a final linked binary, then assume we need
4800 toc adjusting stubs when calling functions defined there. */
4803 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4805 if ((sec->flags & SEC_CODE) != 0
4806 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4807 && is_ppc64_elf (sec->owner))
4809 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4811 && got->size >= elf_backend_got_header_size
4812 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4813 sec->has_toc_reloc = 1;
4815 _bfd_elf_link_just_syms (sec, info);
4818 static struct plt_entry **
4819 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4820 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4822 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4823 struct plt_entry **local_plt;
4824 unsigned char *local_got_tls_masks;
4826 if (local_got_ents == NULL)
4828 bfd_size_type size = symtab_hdr->sh_info;
4830 size *= (sizeof (*local_got_ents)
4831 + sizeof (*local_plt)
4832 + sizeof (*local_got_tls_masks));
4833 local_got_ents = bfd_zalloc (abfd, size);
4834 if (local_got_ents == NULL)
4836 elf_local_got_ents (abfd) = local_got_ents;
4839 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4841 struct got_entry *ent;
4843 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4844 if (ent->addend == r_addend
4845 && ent->owner == abfd
4846 && ent->tls_type == tls_type)
4850 bfd_size_type amt = sizeof (*ent);
4851 ent = bfd_alloc (abfd, amt);
4854 ent->next = local_got_ents[r_symndx];
4855 ent->addend = r_addend;
4857 ent->tls_type = tls_type;
4858 ent->is_indirect = FALSE;
4859 ent->got.refcount = 0;
4860 local_got_ents[r_symndx] = ent;
4862 ent->got.refcount += 1;
4865 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4866 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4867 local_got_tls_masks[r_symndx] |= tls_type;
4869 return local_plt + r_symndx;
4873 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4875 struct plt_entry *ent;
4877 for (ent = *plist; ent != NULL; ent = ent->next)
4878 if (ent->addend == addend)
4882 bfd_size_type amt = sizeof (*ent);
4883 ent = bfd_alloc (abfd, amt);
4887 ent->addend = addend;
4888 ent->plt.refcount = 0;
4891 ent->plt.refcount += 1;
4896 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4898 return (r_type == R_PPC64_REL24
4899 || r_type == R_PPC64_REL14
4900 || r_type == R_PPC64_REL14_BRTAKEN
4901 || r_type == R_PPC64_REL14_BRNTAKEN
4902 || r_type == R_PPC64_ADDR24
4903 || r_type == R_PPC64_ADDR14
4904 || r_type == R_PPC64_ADDR14_BRTAKEN
4905 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4908 /* Look through the relocs for a section during the first phase, and
4909 calculate needed space in the global offset table, procedure
4910 linkage table, and dynamic reloc sections. */
4913 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4914 asection *sec, const Elf_Internal_Rela *relocs)
4916 struct ppc_link_hash_table *htab;
4917 Elf_Internal_Shdr *symtab_hdr;
4918 struct elf_link_hash_entry **sym_hashes;
4919 const Elf_Internal_Rela *rel;
4920 const Elf_Internal_Rela *rel_end;
4922 asection **opd_sym_map;
4923 struct elf_link_hash_entry *tga, *dottga;
4925 if (info->relocatable)
4928 /* Don't do anything special with non-loaded, non-alloced sections.
4929 In particular, any relocs in such sections should not affect GOT
4930 and PLT reference counting (ie. we don't allow them to create GOT
4931 or PLT entries), there's no possibility or desire to optimize TLS
4932 relocs, and there's not much point in propagating relocs to shared
4933 libs that the dynamic linker won't relocate. */
4934 if ((sec->flags & SEC_ALLOC) == 0)
4937 BFD_ASSERT (is_ppc64_elf (abfd));
4939 htab = ppc_hash_table (info);
4943 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4944 FALSE, FALSE, TRUE);
4945 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4946 FALSE, FALSE, TRUE);
4947 symtab_hdr = &elf_symtab_hdr (abfd);
4948 sym_hashes = elf_sym_hashes (abfd);
4951 if (strcmp (sec->name, ".opd") == 0)
4953 /* Garbage collection needs some extra help with .opd sections.
4954 We don't want to necessarily keep everything referenced by
4955 relocs in .opd, as that would keep all functions. Instead,
4956 if we reference an .opd symbol (a function descriptor), we
4957 want to keep the function code symbol's section. This is
4958 easy for global symbols, but for local syms we need to keep
4959 information about the associated function section. */
4962 amt = sec->size * sizeof (*opd_sym_map) / 8;
4963 opd_sym_map = bfd_zalloc (abfd, amt);
4964 if (opd_sym_map == NULL)
4966 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4967 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4968 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4971 if (htab->sfpr == NULL
4972 && !create_linkage_sections (htab->elf.dynobj, info))
4975 rel_end = relocs + sec->reloc_count;
4976 for (rel = relocs; rel < rel_end; rel++)
4978 unsigned long r_symndx;
4979 struct elf_link_hash_entry *h;
4980 enum elf_ppc64_reloc_type r_type;
4982 struct _ppc64_elf_section_data *ppc64_sec;
4983 struct plt_entry **ifunc;
4985 r_symndx = ELF64_R_SYM (rel->r_info);
4986 if (r_symndx < symtab_hdr->sh_info)
4990 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4991 h = elf_follow_link (h);
4998 if (h->type == STT_GNU_IFUNC)
5001 ifunc = &h->plt.plist;
5006 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5011 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5013 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5014 rel->r_addend, PLT_IFUNC);
5019 r_type = ELF64_R_TYPE (rel->r_info);
5020 if (is_branch_reloc (r_type))
5022 if (h != NULL && (h == tga || h == dottga))
5025 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5026 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5027 /* We have a new-style __tls_get_addr call with a marker
5031 /* Mark this section as having an old-style call. */
5032 sec->has_tls_get_addr_call = 1;
5035 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5037 && !update_plt_info (abfd, ifunc, rel->r_addend))
5045 /* These special tls relocs tie a call to __tls_get_addr with
5046 its parameter symbol. */
5049 case R_PPC64_GOT_TLSLD16:
5050 case R_PPC64_GOT_TLSLD16_LO:
5051 case R_PPC64_GOT_TLSLD16_HI:
5052 case R_PPC64_GOT_TLSLD16_HA:
5053 tls_type = TLS_TLS | TLS_LD;
5056 case R_PPC64_GOT_TLSGD16:
5057 case R_PPC64_GOT_TLSGD16_LO:
5058 case R_PPC64_GOT_TLSGD16_HI:
5059 case R_PPC64_GOT_TLSGD16_HA:
5060 tls_type = TLS_TLS | TLS_GD;
5063 case R_PPC64_GOT_TPREL16_DS:
5064 case R_PPC64_GOT_TPREL16_LO_DS:
5065 case R_PPC64_GOT_TPREL16_HI:
5066 case R_PPC64_GOT_TPREL16_HA:
5067 if (!info->executable)
5068 info->flags |= DF_STATIC_TLS;
5069 tls_type = TLS_TLS | TLS_TPREL;
5072 case R_PPC64_GOT_DTPREL16_DS:
5073 case R_PPC64_GOT_DTPREL16_LO_DS:
5074 case R_PPC64_GOT_DTPREL16_HI:
5075 case R_PPC64_GOT_DTPREL16_HA:
5076 tls_type = TLS_TLS | TLS_DTPREL;
5078 sec->has_tls_reloc = 1;
5082 case R_PPC64_GOT16_DS:
5083 case R_PPC64_GOT16_HA:
5084 case R_PPC64_GOT16_HI:
5085 case R_PPC64_GOT16_LO:
5086 case R_PPC64_GOT16_LO_DS:
5087 /* This symbol requires a global offset table entry. */
5088 sec->has_toc_reloc = 1;
5089 if (r_type == R_PPC64_GOT_TLSLD16
5090 || r_type == R_PPC64_GOT_TLSGD16
5091 || r_type == R_PPC64_GOT_TPREL16_DS
5092 || r_type == R_PPC64_GOT_DTPREL16_DS
5093 || r_type == R_PPC64_GOT16
5094 || r_type == R_PPC64_GOT16_DS)
5096 htab->do_multi_toc = 1;
5097 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5100 if (ppc64_elf_tdata (abfd)->got == NULL
5101 && !create_got_section (abfd, info))
5106 struct ppc_link_hash_entry *eh;
5107 struct got_entry *ent;
5109 eh = (struct ppc_link_hash_entry *) h;
5110 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5111 if (ent->addend == rel->r_addend
5112 && ent->owner == abfd
5113 && ent->tls_type == tls_type)
5117 bfd_size_type amt = sizeof (*ent);
5118 ent = bfd_alloc (abfd, amt);
5121 ent->next = eh->elf.got.glist;
5122 ent->addend = rel->r_addend;
5124 ent->tls_type = tls_type;
5125 ent->is_indirect = FALSE;
5126 ent->got.refcount = 0;
5127 eh->elf.got.glist = ent;
5129 ent->got.refcount += 1;
5130 eh->tls_mask |= tls_type;
5133 /* This is a global offset table entry for a local symbol. */
5134 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5135 rel->r_addend, tls_type))
5139 case R_PPC64_PLT16_HA:
5140 case R_PPC64_PLT16_HI:
5141 case R_PPC64_PLT16_LO:
5144 /* This symbol requires a procedure linkage table entry. We
5145 actually build the entry in adjust_dynamic_symbol,
5146 because this might be a case of linking PIC code without
5147 linking in any dynamic objects, in which case we don't
5148 need to generate a procedure linkage table after all. */
5151 /* It does not make sense to have a procedure linkage
5152 table entry for a local symbol. */
5153 bfd_set_error (bfd_error_bad_value);
5158 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5161 if (h->root.root.string[0] == '.'
5162 && h->root.root.string[1] != '\0')
5163 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5167 /* The following relocations don't need to propagate the
5168 relocation if linking a shared object since they are
5169 section relative. */
5170 case R_PPC64_SECTOFF:
5171 case R_PPC64_SECTOFF_LO:
5172 case R_PPC64_SECTOFF_HI:
5173 case R_PPC64_SECTOFF_HA:
5174 case R_PPC64_SECTOFF_DS:
5175 case R_PPC64_SECTOFF_LO_DS:
5176 case R_PPC64_DTPREL16:
5177 case R_PPC64_DTPREL16_LO:
5178 case R_PPC64_DTPREL16_HI:
5179 case R_PPC64_DTPREL16_HA:
5180 case R_PPC64_DTPREL16_DS:
5181 case R_PPC64_DTPREL16_LO_DS:
5182 case R_PPC64_DTPREL16_HIGHER:
5183 case R_PPC64_DTPREL16_HIGHERA:
5184 case R_PPC64_DTPREL16_HIGHEST:
5185 case R_PPC64_DTPREL16_HIGHESTA:
5190 case R_PPC64_REL16_LO:
5191 case R_PPC64_REL16_HI:
5192 case R_PPC64_REL16_HA:
5196 case R_PPC64_TOC16_DS:
5197 htab->do_multi_toc = 1;
5198 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5199 case R_PPC64_TOC16_LO:
5200 case R_PPC64_TOC16_HI:
5201 case R_PPC64_TOC16_HA:
5202 case R_PPC64_TOC16_LO_DS:
5203 sec->has_toc_reloc = 1;
5206 /* This relocation describes the C++ object vtable hierarchy.
5207 Reconstruct it for later use during GC. */
5208 case R_PPC64_GNU_VTINHERIT:
5209 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5213 /* This relocation describes which C++ vtable entries are actually
5214 used. Record for later use during GC. */
5215 case R_PPC64_GNU_VTENTRY:
5216 BFD_ASSERT (h != NULL);
5218 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5223 case R_PPC64_REL14_BRTAKEN:
5224 case R_PPC64_REL14_BRNTAKEN:
5226 asection *dest = NULL;
5228 /* Heuristic: If jumping outside our section, chances are
5229 we are going to need a stub. */
5232 /* If the sym is weak it may be overridden later, so
5233 don't assume we know where a weak sym lives. */
5234 if (h->root.type == bfd_link_hash_defined)
5235 dest = h->root.u.def.section;
5239 Elf_Internal_Sym *isym;
5241 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5246 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5250 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5255 if (h != NULL && ifunc == NULL)
5257 /* We may need a .plt entry if the function this reloc
5258 refers to is in a shared lib. */
5259 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5262 if (h->root.root.string[0] == '.'
5263 && h->root.root.string[1] != '\0')
5264 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5265 if (h == tga || h == dottga)
5266 sec->has_tls_reloc = 1;
5270 case R_PPC64_TPREL64:
5271 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5272 if (!info->executable)
5273 info->flags |= DF_STATIC_TLS;
5276 case R_PPC64_DTPMOD64:
5277 if (rel + 1 < rel_end
5278 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5279 && rel[1].r_offset == rel->r_offset + 8)
5280 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5282 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5285 case R_PPC64_DTPREL64:
5286 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5288 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5289 && rel[-1].r_offset == rel->r_offset - 8)
5290 /* This is the second reloc of a dtpmod, dtprel pair.
5291 Don't mark with TLS_DTPREL. */
5295 sec->has_tls_reloc = 1;
5298 struct ppc_link_hash_entry *eh;
5299 eh = (struct ppc_link_hash_entry *) h;
5300 eh->tls_mask |= tls_type;
5303 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5304 rel->r_addend, tls_type))
5307 ppc64_sec = ppc64_elf_section_data (sec);
5308 if (ppc64_sec->sec_type != sec_toc)
5312 /* One extra to simplify get_tls_mask. */
5313 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5314 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5315 if (ppc64_sec->u.toc.symndx == NULL)
5317 amt = sec->size * sizeof (bfd_vma) / 8;
5318 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5319 if (ppc64_sec->u.toc.add == NULL)
5321 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5322 ppc64_sec->sec_type = sec_toc;
5324 BFD_ASSERT (rel->r_offset % 8 == 0);
5325 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5326 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5328 /* Mark the second slot of a GD or LD entry.
5329 -1 to indicate GD and -2 to indicate LD. */
5330 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5331 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5332 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5333 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5336 case R_PPC64_TPREL16:
5337 case R_PPC64_TPREL16_LO:
5338 case R_PPC64_TPREL16_HI:
5339 case R_PPC64_TPREL16_HA:
5340 case R_PPC64_TPREL16_DS:
5341 case R_PPC64_TPREL16_LO_DS:
5342 case R_PPC64_TPREL16_HIGHER:
5343 case R_PPC64_TPREL16_HIGHERA:
5344 case R_PPC64_TPREL16_HIGHEST:
5345 case R_PPC64_TPREL16_HIGHESTA:
5348 if (!info->executable)
5349 info->flags |= DF_STATIC_TLS;
5354 case R_PPC64_ADDR64:
5355 if (opd_sym_map != NULL
5356 && rel + 1 < rel_end
5357 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5361 if (h->root.root.string[0] == '.'
5362 && h->root.root.string[1] != 0
5363 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5366 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5371 Elf_Internal_Sym *isym;
5373 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5378 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5379 if (s != NULL && s != sec)
5380 opd_sym_map[rel->r_offset / 8] = s;
5388 case R_PPC64_ADDR14:
5389 case R_PPC64_ADDR14_BRNTAKEN:
5390 case R_PPC64_ADDR14_BRTAKEN:
5391 case R_PPC64_ADDR16:
5392 case R_PPC64_ADDR16_DS:
5393 case R_PPC64_ADDR16_HA:
5394 case R_PPC64_ADDR16_HI:
5395 case R_PPC64_ADDR16_HIGHER:
5396 case R_PPC64_ADDR16_HIGHERA:
5397 case R_PPC64_ADDR16_HIGHEST:
5398 case R_PPC64_ADDR16_HIGHESTA:
5399 case R_PPC64_ADDR16_LO:
5400 case R_PPC64_ADDR16_LO_DS:
5401 case R_PPC64_ADDR24:
5402 case R_PPC64_ADDR32:
5403 case R_PPC64_UADDR16:
5404 case R_PPC64_UADDR32:
5405 case R_PPC64_UADDR64:
5407 if (h != NULL && !info->shared)
5408 /* We may need a copy reloc. */
5411 /* Don't propagate .opd relocs. */
5412 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5415 /* If we are creating a shared library, and this is a reloc
5416 against a global symbol, or a non PC relative reloc
5417 against a local symbol, then we need to copy the reloc
5418 into the shared library. However, if we are linking with
5419 -Bsymbolic, we do not need to copy a reloc against a
5420 global symbol which is defined in an object we are
5421 including in the link (i.e., DEF_REGULAR is set). At
5422 this point we have not seen all the input files, so it is
5423 possible that DEF_REGULAR is not set now but will be set
5424 later (it is never cleared). In case of a weak definition,
5425 DEF_REGULAR may be cleared later by a strong definition in
5426 a shared library. We account for that possibility below by
5427 storing information in the dyn_relocs field of the hash
5428 table entry. A similar situation occurs when creating
5429 shared libraries and symbol visibility changes render the
5432 If on the other hand, we are creating an executable, we
5433 may need to keep relocations for symbols satisfied by a
5434 dynamic library if we manage to avoid copy relocs for the
5438 && (must_be_dyn_reloc (info, r_type)
5440 && (! info->symbolic
5441 || h->root.type == bfd_link_hash_defweak
5442 || !h->def_regular))))
5443 || (ELIMINATE_COPY_RELOCS
5446 && (h->root.type == bfd_link_hash_defweak
5447 || !h->def_regular))
5451 struct elf_dyn_relocs *p;
5452 struct elf_dyn_relocs **head;
5454 /* We must copy these reloc types into the output file.
5455 Create a reloc section in dynobj and make room for
5459 sreloc = _bfd_elf_make_dynamic_reloc_section
5460 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5466 /* If this is a global symbol, we count the number of
5467 relocations we need for this symbol. */
5470 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5474 /* Track dynamic relocs needed for local syms too.
5475 We really need local syms available to do this
5479 Elf_Internal_Sym *isym;
5481 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5486 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5490 vpp = &elf_section_data (s)->local_dynrel;
5491 head = (struct elf_dyn_relocs **) vpp;
5495 if (p == NULL || p->sec != sec)
5497 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5508 if (!must_be_dyn_reloc (info, r_type))
5521 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5522 of the code entry point, and its section. */
5525 opd_entry_value (asection *opd_sec,
5527 asection **code_sec,
5529 bfd_boolean in_code_sec)
5531 bfd *opd_bfd = opd_sec->owner;
5532 Elf_Internal_Rela *relocs;
5533 Elf_Internal_Rela *lo, *hi, *look;
5536 /* No relocs implies we are linking a --just-symbols object, or looking
5537 at a final linked executable with addr2line or somesuch. */
5538 if (opd_sec->reloc_count == 0)
5542 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5543 return (bfd_vma) -1;
5545 val = bfd_get_64 (opd_bfd, buf);
5546 if (code_sec != NULL)
5548 asection *sec, *likely = NULL;
5554 && val < sec->vma + sec->size)
5560 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5562 && (sec->flags & SEC_LOAD) != 0
5563 && (sec->flags & SEC_ALLOC) != 0)
5568 if (code_off != NULL)
5569 *code_off = val - likely->vma;
5575 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5577 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5579 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5581 /* Go find the opd reloc at the sym address. */
5583 BFD_ASSERT (lo != NULL);
5584 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5588 look = lo + (hi - lo) / 2;
5589 if (look->r_offset < offset)
5591 else if (look->r_offset > offset)
5595 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5597 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5598 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5600 unsigned long symndx = ELF64_R_SYM (look->r_info);
5603 if (symndx < symtab_hdr->sh_info
5604 || elf_sym_hashes (opd_bfd) == NULL)
5606 Elf_Internal_Sym *sym;
5608 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5611 size_t symcnt = symtab_hdr->sh_info;
5612 if (elf_sym_hashes (opd_bfd) == NULL)
5613 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5614 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5615 0, NULL, NULL, NULL);
5618 symtab_hdr->contents = (bfd_byte *) sym;
5622 val = sym->st_value;
5623 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5624 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5628 struct elf_link_hash_entry **sym_hashes;
5629 struct elf_link_hash_entry *rh;
5631 sym_hashes = elf_sym_hashes (opd_bfd);
5632 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5633 rh = elf_follow_link (rh);
5634 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5635 || rh->root.type == bfd_link_hash_defweak);
5636 val = rh->root.u.def.value;
5637 sec = rh->root.u.def.section;
5639 val += look->r_addend;
5640 if (code_off != NULL)
5642 if (code_sec != NULL)
5644 if (in_code_sec && *code_sec != sec)
5649 if (sec != NULL && sec->output_section != NULL)
5650 val += sec->output_section->vma + sec->output_offset;
5659 /* If the ELF symbol SYM might be a function in SEC, return the
5660 function size and set *CODE_OFF to the function's entry point,
5661 otherwise return zero. */
5663 static bfd_size_type
5664 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
5669 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
5670 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
5674 if (!(sym->flags & BSF_SYNTHETIC))
5675 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
5677 if (strcmp (sym->section->name, ".opd") == 0)
5679 if (opd_entry_value (sym->section, sym->value,
5680 &sec, code_off, TRUE) == (bfd_vma) -1)
5682 /* An old ABI binary with dot-syms has a size of 24 on the .opd
5683 symbol. This size has nothing to do with the code size of the
5684 function, which is what we're supposed to return, but the
5685 code size isn't available without looking up the dot-sym.
5686 However, doing that would be a waste of time particularly
5687 since elf_find_function will look at the dot-sym anyway.
5688 Now, elf_find_function will keep the largest size of any
5689 function sym found at the code address of interest, so return
5690 1 here to avoid it incorrectly caching a larger function size
5691 for a small function. This does mean we return the wrong
5692 size for a new-ABI function of size 24, but all that does is
5693 disable caching for such functions. */
5699 if (sym->section != sec)
5701 *code_off = sym->value;
5708 /* Return true if symbol is defined in a regular object file. */
5711 is_static_defined (struct elf_link_hash_entry *h)
5713 return ((h->root.type == bfd_link_hash_defined
5714 || h->root.type == bfd_link_hash_defweak)
5715 && h->root.u.def.section != NULL
5716 && h->root.u.def.section->output_section != NULL);
5719 /* If FDH is a function descriptor symbol, return the associated code
5720 entry symbol if it is defined. Return NULL otherwise. */
5722 static struct ppc_link_hash_entry *
5723 defined_code_entry (struct ppc_link_hash_entry *fdh)
5725 if (fdh->is_func_descriptor)
5727 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5728 if (fh->elf.root.type == bfd_link_hash_defined
5729 || fh->elf.root.type == bfd_link_hash_defweak)
5735 /* If FH is a function code entry symbol, return the associated
5736 function descriptor symbol if it is defined. Return NULL otherwise. */
5738 static struct ppc_link_hash_entry *
5739 defined_func_desc (struct ppc_link_hash_entry *fh)
5742 && fh->oh->is_func_descriptor)
5744 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5745 if (fdh->elf.root.type == bfd_link_hash_defined
5746 || fdh->elf.root.type == bfd_link_hash_defweak)
5752 /* Mark all our entry sym sections, both opd and code section. */
5755 ppc64_elf_gc_keep (struct bfd_link_info *info)
5757 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5758 struct bfd_sym_chain *sym;
5763 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5765 struct ppc_link_hash_entry *eh, *fh;
5768 eh = (struct ppc_link_hash_entry *)
5769 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5772 if (eh->elf.root.type != bfd_link_hash_defined
5773 && eh->elf.root.type != bfd_link_hash_defweak)
5776 fh = defined_code_entry (eh);
5779 sec = fh->elf.root.u.def.section;
5780 sec->flags |= SEC_KEEP;
5782 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5783 && opd_entry_value (eh->elf.root.u.def.section,
5784 eh->elf.root.u.def.value,
5785 &sec, NULL, FALSE) != (bfd_vma) -1)
5786 sec->flags |= SEC_KEEP;
5788 sec = eh->elf.root.u.def.section;
5789 sec->flags |= SEC_KEEP;
5793 /* Mark sections containing dynamically referenced symbols. When
5794 building shared libraries, we must assume that any visible symbol is
5798 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5800 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5801 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5802 struct ppc_link_hash_entry *fdh;
5804 /* Dynamic linking info is on the func descriptor sym. */
5805 fdh = defined_func_desc (eh);
5809 if ((eh->elf.root.type == bfd_link_hash_defined
5810 || eh->elf.root.type == bfd_link_hash_defweak)
5811 && (eh->elf.ref_dynamic
5812 || (!info->executable
5813 && eh->elf.def_regular
5814 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5815 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5816 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5817 || !bfd_hide_sym_by_version (info->version_info,
5818 eh->elf.root.root.string)))))
5821 struct ppc_link_hash_entry *fh;
5823 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5825 /* Function descriptor syms cause the associated
5826 function code sym section to be marked. */
5827 fh = defined_code_entry (eh);
5830 code_sec = fh->elf.root.u.def.section;
5831 code_sec->flags |= SEC_KEEP;
5833 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5834 && opd_entry_value (eh->elf.root.u.def.section,
5835 eh->elf.root.u.def.value,
5836 &code_sec, NULL, FALSE) != (bfd_vma) -1)
5837 code_sec->flags |= SEC_KEEP;
5843 /* Return the section that should be marked against GC for a given
5847 ppc64_elf_gc_mark_hook (asection *sec,
5848 struct bfd_link_info *info,
5849 Elf_Internal_Rela *rel,
5850 struct elf_link_hash_entry *h,
5851 Elf_Internal_Sym *sym)
5855 /* Syms return NULL if we're marking .opd, so we avoid marking all
5856 function sections, as all functions are referenced in .opd. */
5858 if (get_opd_info (sec) != NULL)
5863 enum elf_ppc64_reloc_type r_type;
5864 struct ppc_link_hash_entry *eh, *fh, *fdh;
5866 r_type = ELF64_R_TYPE (rel->r_info);
5869 case R_PPC64_GNU_VTINHERIT:
5870 case R_PPC64_GNU_VTENTRY:
5874 switch (h->root.type)
5876 case bfd_link_hash_defined:
5877 case bfd_link_hash_defweak:
5878 eh = (struct ppc_link_hash_entry *) h;
5879 fdh = defined_func_desc (eh);
5883 /* Function descriptor syms cause the associated
5884 function code sym section to be marked. */
5885 fh = defined_code_entry (eh);
5888 /* They also mark their opd section. */
5889 eh->elf.root.u.def.section->gc_mark = 1;
5891 rsec = fh->elf.root.u.def.section;
5893 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5894 && opd_entry_value (eh->elf.root.u.def.section,
5895 eh->elf.root.u.def.value,
5896 &rsec, NULL, FALSE) != (bfd_vma) -1)
5897 eh->elf.root.u.def.section->gc_mark = 1;
5899 rsec = h->root.u.def.section;
5902 case bfd_link_hash_common:
5903 rsec = h->root.u.c.p->section;
5907 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5913 struct _opd_sec_data *opd;
5915 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5916 opd = get_opd_info (rsec);
5917 if (opd != NULL && opd->func_sec != NULL)
5921 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5928 /* Update the .got, .plt. and dynamic reloc reference counts for the
5929 section being removed. */
5932 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5933 asection *sec, const Elf_Internal_Rela *relocs)
5935 struct ppc_link_hash_table *htab;
5936 Elf_Internal_Shdr *symtab_hdr;
5937 struct elf_link_hash_entry **sym_hashes;
5938 struct got_entry **local_got_ents;
5939 const Elf_Internal_Rela *rel, *relend;
5941 if (info->relocatable)
5944 if ((sec->flags & SEC_ALLOC) == 0)
5947 elf_section_data (sec)->local_dynrel = NULL;
5949 htab = ppc_hash_table (info);
5953 symtab_hdr = &elf_symtab_hdr (abfd);
5954 sym_hashes = elf_sym_hashes (abfd);
5955 local_got_ents = elf_local_got_ents (abfd);
5957 relend = relocs + sec->reloc_count;
5958 for (rel = relocs; rel < relend; rel++)
5960 unsigned long r_symndx;
5961 enum elf_ppc64_reloc_type r_type;
5962 struct elf_link_hash_entry *h = NULL;
5963 unsigned char tls_type = 0;
5965 r_symndx = ELF64_R_SYM (rel->r_info);
5966 r_type = ELF64_R_TYPE (rel->r_info);
5967 if (r_symndx >= symtab_hdr->sh_info)
5969 struct ppc_link_hash_entry *eh;
5970 struct elf_dyn_relocs **pp;
5971 struct elf_dyn_relocs *p;
5973 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5974 h = elf_follow_link (h);
5975 eh = (struct ppc_link_hash_entry *) h;
5977 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5980 /* Everything must go for SEC. */
5986 if (is_branch_reloc (r_type))
5988 struct plt_entry **ifunc = NULL;
5991 if (h->type == STT_GNU_IFUNC)
5992 ifunc = &h->plt.plist;
5994 else if (local_got_ents != NULL)
5996 struct plt_entry **local_plt = (struct plt_entry **)
5997 (local_got_ents + symtab_hdr->sh_info);
5998 unsigned char *local_got_tls_masks = (unsigned char *)
5999 (local_plt + symtab_hdr->sh_info);
6000 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6001 ifunc = local_plt + r_symndx;
6005 struct plt_entry *ent;
6007 for (ent = *ifunc; ent != NULL; ent = ent->next)
6008 if (ent->addend == rel->r_addend)
6012 if (ent->plt.refcount > 0)
6013 ent->plt.refcount -= 1;
6020 case R_PPC64_GOT_TLSLD16:
6021 case R_PPC64_GOT_TLSLD16_LO:
6022 case R_PPC64_GOT_TLSLD16_HI:
6023 case R_PPC64_GOT_TLSLD16_HA:
6024 tls_type = TLS_TLS | TLS_LD;
6027 case R_PPC64_GOT_TLSGD16:
6028 case R_PPC64_GOT_TLSGD16_LO:
6029 case R_PPC64_GOT_TLSGD16_HI:
6030 case R_PPC64_GOT_TLSGD16_HA:
6031 tls_type = TLS_TLS | TLS_GD;
6034 case R_PPC64_GOT_TPREL16_DS:
6035 case R_PPC64_GOT_TPREL16_LO_DS:
6036 case R_PPC64_GOT_TPREL16_HI:
6037 case R_PPC64_GOT_TPREL16_HA:
6038 tls_type = TLS_TLS | TLS_TPREL;
6041 case R_PPC64_GOT_DTPREL16_DS:
6042 case R_PPC64_GOT_DTPREL16_LO_DS:
6043 case R_PPC64_GOT_DTPREL16_HI:
6044 case R_PPC64_GOT_DTPREL16_HA:
6045 tls_type = TLS_TLS | TLS_DTPREL;
6049 case R_PPC64_GOT16_DS:
6050 case R_PPC64_GOT16_HA:
6051 case R_PPC64_GOT16_HI:
6052 case R_PPC64_GOT16_LO:
6053 case R_PPC64_GOT16_LO_DS:
6056 struct got_entry *ent;
6061 ent = local_got_ents[r_symndx];
6063 for (; ent != NULL; ent = ent->next)
6064 if (ent->addend == rel->r_addend
6065 && ent->owner == abfd
6066 && ent->tls_type == tls_type)
6070 if (ent->got.refcount > 0)
6071 ent->got.refcount -= 1;
6075 case R_PPC64_PLT16_HA:
6076 case R_PPC64_PLT16_HI:
6077 case R_PPC64_PLT16_LO:
6081 case R_PPC64_REL14_BRNTAKEN:
6082 case R_PPC64_REL14_BRTAKEN:
6086 struct plt_entry *ent;
6088 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6089 if (ent->addend == rel->r_addend)
6091 if (ent != NULL && ent->plt.refcount > 0)
6092 ent->plt.refcount -= 1;
6103 /* The maximum size of .sfpr. */
6104 #define SFPR_MAX (218*4)
6106 struct sfpr_def_parms
6108 const char name[12];
6109 unsigned char lo, hi;
6110 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6111 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6114 /* Auto-generate _save*, _rest* functions in .sfpr. */
6117 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6119 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6121 size_t len = strlen (parm->name);
6122 bfd_boolean writing = FALSE;
6128 memcpy (sym, parm->name, len);
6131 for (i = parm->lo; i <= parm->hi; i++)
6133 struct elf_link_hash_entry *h;
6135 sym[len + 0] = i / 10 + '0';
6136 sym[len + 1] = i % 10 + '0';
6137 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6141 h->root.type = bfd_link_hash_defined;
6142 h->root.u.def.section = htab->sfpr;
6143 h->root.u.def.value = htab->sfpr->size;
6146 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6148 if (htab->sfpr->contents == NULL)
6150 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6151 if (htab->sfpr->contents == NULL)
6157 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6159 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6161 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6162 htab->sfpr->size = p - htab->sfpr->contents;
6170 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6172 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6177 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6179 p = savegpr0 (abfd, p, r);
6180 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6182 bfd_put_32 (abfd, BLR, p);
6187 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6189 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6194 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6196 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6198 p = restgpr0 (abfd, p, r);
6199 bfd_put_32 (abfd, MTLR_R0, p);
6203 p = restgpr0 (abfd, p, 30);
6204 p = restgpr0 (abfd, p, 31);
6206 bfd_put_32 (abfd, BLR, p);
6211 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6213 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6218 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6220 p = savegpr1 (abfd, p, r);
6221 bfd_put_32 (abfd, BLR, p);
6226 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6228 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6233 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6235 p = restgpr1 (abfd, p, r);
6236 bfd_put_32 (abfd, BLR, p);
6241 savefpr (bfd *abfd, bfd_byte *p, int r)
6243 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6248 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6250 p = savefpr (abfd, p, r);
6251 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6253 bfd_put_32 (abfd, BLR, p);
6258 restfpr (bfd *abfd, bfd_byte *p, int r)
6260 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6265 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6267 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6269 p = restfpr (abfd, p, r);
6270 bfd_put_32 (abfd, MTLR_R0, p);
6274 p = restfpr (abfd, p, 30);
6275 p = restfpr (abfd, p, 31);
6277 bfd_put_32 (abfd, BLR, p);
6282 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6284 p = savefpr (abfd, p, r);
6285 bfd_put_32 (abfd, BLR, p);
6290 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6292 p = restfpr (abfd, p, r);
6293 bfd_put_32 (abfd, BLR, p);
6298 savevr (bfd *abfd, bfd_byte *p, int r)
6300 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6302 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6307 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6309 p = savevr (abfd, p, r);
6310 bfd_put_32 (abfd, BLR, p);
6315 restvr (bfd *abfd, bfd_byte *p, int r)
6317 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6319 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6324 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6326 p = restvr (abfd, p, r);
6327 bfd_put_32 (abfd, BLR, p);
6331 /* Called via elf_link_hash_traverse to transfer dynamic linking
6332 information on function code symbol entries to their corresponding
6333 function descriptor symbol entries. */
6336 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6338 struct bfd_link_info *info;
6339 struct ppc_link_hash_table *htab;
6340 struct plt_entry *ent;
6341 struct ppc_link_hash_entry *fh;
6342 struct ppc_link_hash_entry *fdh;
6343 bfd_boolean force_local;
6345 fh = (struct ppc_link_hash_entry *) h;
6346 if (fh->elf.root.type == bfd_link_hash_indirect)
6350 htab = ppc_hash_table (info);
6354 /* Resolve undefined references to dot-symbols as the value
6355 in the function descriptor, if we have one in a regular object.
6356 This is to satisfy cases like ".quad .foo". Calls to functions
6357 in dynamic objects are handled elsewhere. */
6358 if (fh->elf.root.type == bfd_link_hash_undefweak
6359 && fh->was_undefined
6360 && (fdh = defined_func_desc (fh)) != NULL
6361 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6362 && opd_entry_value (fdh->elf.root.u.def.section,
6363 fdh->elf.root.u.def.value,
6364 &fh->elf.root.u.def.section,
6365 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6367 fh->elf.root.type = fdh->elf.root.type;
6368 fh->elf.forced_local = 1;
6369 fh->elf.def_regular = fdh->elf.def_regular;
6370 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6373 /* If this is a function code symbol, transfer dynamic linking
6374 information to the function descriptor symbol. */
6378 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6379 if (ent->plt.refcount > 0)
6382 || fh->elf.root.root.string[0] != '.'
6383 || fh->elf.root.root.string[1] == '\0')
6386 /* Find the corresponding function descriptor symbol. Create it
6387 as undefined if necessary. */
6389 fdh = lookup_fdh (fh, htab);
6391 && !info->executable
6392 && (fh->elf.root.type == bfd_link_hash_undefined
6393 || fh->elf.root.type == bfd_link_hash_undefweak))
6395 fdh = make_fdh (info, fh);
6400 /* Fake function descriptors are made undefweak. If the function
6401 code symbol is strong undefined, make the fake sym the same.
6402 If the function code symbol is defined, then force the fake
6403 descriptor local; We can't support overriding of symbols in a
6404 shared library on a fake descriptor. */
6408 && fdh->elf.root.type == bfd_link_hash_undefweak)
6410 if (fh->elf.root.type == bfd_link_hash_undefined)
6412 fdh->elf.root.type = bfd_link_hash_undefined;
6413 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6415 else if (fh->elf.root.type == bfd_link_hash_defined
6416 || fh->elf.root.type == bfd_link_hash_defweak)
6418 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6423 && !fdh->elf.forced_local
6424 && (!info->executable
6425 || fdh->elf.def_dynamic
6426 || fdh->elf.ref_dynamic
6427 || (fdh->elf.root.type == bfd_link_hash_undefweak
6428 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6430 if (fdh->elf.dynindx == -1)
6431 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6433 fdh->elf.ref_regular |= fh->elf.ref_regular;
6434 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6435 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6436 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6437 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6439 move_plt_plist (fh, fdh);
6440 fdh->elf.needs_plt = 1;
6442 fdh->is_func_descriptor = 1;
6447 /* Now that the info is on the function descriptor, clear the
6448 function code sym info. Any function code syms for which we
6449 don't have a definition in a regular file, we force local.
6450 This prevents a shared library from exporting syms that have
6451 been imported from another library. Function code syms that
6452 are really in the library we must leave global to prevent the
6453 linker dragging in a definition from a static library. */
6454 force_local = (!fh->elf.def_regular
6456 || !fdh->elf.def_regular
6457 || fdh->elf.forced_local);
6458 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6463 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6464 this hook to a) provide some gcc support functions, and b) transfer
6465 dynamic linking information gathered so far on function code symbol
6466 entries, to their corresponding function descriptor symbol entries. */
6469 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6470 struct bfd_link_info *info)
6472 struct ppc_link_hash_table *htab;
6474 static const struct sfpr_def_parms funcs[] =
6476 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6477 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6478 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6479 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6480 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6481 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6482 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6483 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6484 { "._savef", 14, 31, savefpr, savefpr1_tail },
6485 { "._restf", 14, 31, restfpr, restfpr1_tail },
6486 { "_savevr_", 20, 31, savevr, savevr_tail },
6487 { "_restvr_", 20, 31, restvr, restvr_tail }
6490 htab = ppc_hash_table (info);
6494 if (htab->sfpr == NULL)
6495 /* We don't have any relocs. */
6498 /* Provide any missing _save* and _rest* functions. */
6499 htab->sfpr->size = 0;
6500 if (!info->relocatable)
6501 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6502 if (!sfpr_define (info, &funcs[i]))
6505 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6507 if (htab->sfpr->size == 0)
6508 htab->sfpr->flags |= SEC_EXCLUDE;
6513 /* Adjust a symbol defined by a dynamic object and referenced by a
6514 regular object. The current definition is in some section of the
6515 dynamic object, but we're not including those sections. We have to
6516 change the definition to something the rest of the link can
6520 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6521 struct elf_link_hash_entry *h)
6523 struct ppc_link_hash_table *htab;
6526 htab = ppc_hash_table (info);
6530 /* Deal with function syms. */
6531 if (h->type == STT_FUNC
6532 || h->type == STT_GNU_IFUNC
6535 /* Clear procedure linkage table information for any symbol that
6536 won't need a .plt entry. */
6537 struct plt_entry *ent;
6538 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6539 if (ent->plt.refcount > 0)
6542 || (h->type != STT_GNU_IFUNC
6543 && (SYMBOL_CALLS_LOCAL (info, h)
6544 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6545 && h->root.type == bfd_link_hash_undefweak))))
6547 h->plt.plist = NULL;
6552 h->plt.plist = NULL;
6554 /* If this is a weak symbol, and there is a real definition, the
6555 processor independent code will have arranged for us to see the
6556 real definition first, and we can just use the same value. */
6557 if (h->u.weakdef != NULL)
6559 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6560 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6561 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6562 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6563 if (ELIMINATE_COPY_RELOCS)
6564 h->non_got_ref = h->u.weakdef->non_got_ref;
6568 /* If we are creating a shared library, we must presume that the
6569 only references to the symbol are via the global offset table.
6570 For such cases we need not do anything here; the relocations will
6571 be handled correctly by relocate_section. */
6575 /* If there are no references to this symbol that do not use the
6576 GOT, we don't need to generate a copy reloc. */
6577 if (!h->non_got_ref)
6580 /* Don't generate a copy reloc for symbols defined in the executable. */
6581 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6584 if (ELIMINATE_COPY_RELOCS)
6586 struct ppc_link_hash_entry * eh;
6587 struct elf_dyn_relocs *p;
6589 eh = (struct ppc_link_hash_entry *) h;
6590 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6592 s = p->sec->output_section;
6593 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6597 /* If we didn't find any dynamic relocs in read-only sections, then
6598 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6606 if (h->plt.plist != NULL)
6608 /* We should never get here, but unfortunately there are versions
6609 of gcc out there that improperly (for this ABI) put initialized
6610 function pointers, vtable refs and suchlike in read-only
6611 sections. Allow them to proceed, but warn that this might
6612 break at runtime. */
6613 info->callbacks->einfo
6614 (_("%P: copy reloc against `%T' requires lazy plt linking; "
6615 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6616 h->root.root.string);
6619 /* This is a reference to a symbol defined by a dynamic object which
6620 is not a function. */
6622 /* We must allocate the symbol in our .dynbss section, which will
6623 become part of the .bss section of the executable. There will be
6624 an entry for this symbol in the .dynsym section. The dynamic
6625 object will contain position independent code, so all references
6626 from the dynamic object to this symbol will go through the global
6627 offset table. The dynamic linker will use the .dynsym entry to
6628 determine the address it must put in the global offset table, so
6629 both the dynamic object and the regular object will refer to the
6630 same memory location for the variable. */
6632 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6633 to copy the initial value out of the dynamic object and into the
6634 runtime process image. We need to remember the offset into the
6635 .rela.bss section we are going to use. */
6636 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6638 htab->relbss->size += sizeof (Elf64_External_Rela);
6644 return _bfd_elf_adjust_dynamic_copy (h, s);
6647 /* If given a function descriptor symbol, hide both the function code
6648 sym and the descriptor. */
6650 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6651 struct elf_link_hash_entry *h,
6652 bfd_boolean force_local)
6654 struct ppc_link_hash_entry *eh;
6655 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6657 eh = (struct ppc_link_hash_entry *) h;
6658 if (eh->is_func_descriptor)
6660 struct ppc_link_hash_entry *fh = eh->oh;
6665 struct ppc_link_hash_table *htab;
6668 /* We aren't supposed to use alloca in BFD because on
6669 systems which do not have alloca the version in libiberty
6670 calls xmalloc, which might cause the program to crash
6671 when it runs out of memory. This function doesn't have a
6672 return status, so there's no way to gracefully return an
6673 error. So cheat. We know that string[-1] can be safely
6674 accessed; It's either a string in an ELF string table,
6675 or allocated in an objalloc structure. */
6677 p = eh->elf.root.root.string - 1;
6680 htab = ppc_hash_table (info);
6684 fh = (struct ppc_link_hash_entry *)
6685 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6688 /* Unfortunately, if it so happens that the string we were
6689 looking for was allocated immediately before this string,
6690 then we overwrote the string terminator. That's the only
6691 reason the lookup should fail. */
6694 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6695 while (q >= eh->elf.root.root.string && *q == *p)
6697 if (q < eh->elf.root.root.string && *p == '.')
6698 fh = (struct ppc_link_hash_entry *)
6699 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6708 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6713 get_sym_h (struct elf_link_hash_entry **hp,
6714 Elf_Internal_Sym **symp,
6716 unsigned char **tls_maskp,
6717 Elf_Internal_Sym **locsymsp,
6718 unsigned long r_symndx,
6721 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6723 if (r_symndx >= symtab_hdr->sh_info)
6725 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6726 struct elf_link_hash_entry *h;
6728 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6729 h = elf_follow_link (h);
6737 if (symsecp != NULL)
6739 asection *symsec = NULL;
6740 if (h->root.type == bfd_link_hash_defined
6741 || h->root.type == bfd_link_hash_defweak)
6742 symsec = h->root.u.def.section;
6746 if (tls_maskp != NULL)
6748 struct ppc_link_hash_entry *eh;
6750 eh = (struct ppc_link_hash_entry *) h;
6751 *tls_maskp = &eh->tls_mask;
6756 Elf_Internal_Sym *sym;
6757 Elf_Internal_Sym *locsyms = *locsymsp;
6759 if (locsyms == NULL)
6761 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6762 if (locsyms == NULL)
6763 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6764 symtab_hdr->sh_info,
6765 0, NULL, NULL, NULL);
6766 if (locsyms == NULL)
6768 *locsymsp = locsyms;
6770 sym = locsyms + r_symndx;
6778 if (symsecp != NULL)
6779 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6781 if (tls_maskp != NULL)
6783 struct got_entry **lgot_ents;
6784 unsigned char *tls_mask;
6787 lgot_ents = elf_local_got_ents (ibfd);
6788 if (lgot_ents != NULL)
6790 struct plt_entry **local_plt = (struct plt_entry **)
6791 (lgot_ents + symtab_hdr->sh_info);
6792 unsigned char *lgot_masks = (unsigned char *)
6793 (local_plt + symtab_hdr->sh_info);
6794 tls_mask = &lgot_masks[r_symndx];
6796 *tls_maskp = tls_mask;
6802 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6803 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6804 type suitable for optimization, and 1 otherwise. */
6807 get_tls_mask (unsigned char **tls_maskp,
6808 unsigned long *toc_symndx,
6809 bfd_vma *toc_addend,
6810 Elf_Internal_Sym **locsymsp,
6811 const Elf_Internal_Rela *rel,
6814 unsigned long r_symndx;
6816 struct elf_link_hash_entry *h;
6817 Elf_Internal_Sym *sym;
6821 r_symndx = ELF64_R_SYM (rel->r_info);
6822 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6825 if ((*tls_maskp != NULL && **tls_maskp != 0)
6827 || ppc64_elf_section_data (sec) == NULL
6828 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6831 /* Look inside a TOC section too. */
6834 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6835 off = h->root.u.def.value;
6838 off = sym->st_value;
6839 off += rel->r_addend;
6840 BFD_ASSERT (off % 8 == 0);
6841 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6842 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6843 if (toc_symndx != NULL)
6844 *toc_symndx = r_symndx;
6845 if (toc_addend != NULL)
6846 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6847 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6849 if ((h == NULL || is_static_defined (h))
6850 && (next_r == -1 || next_r == -2))
6855 /* Find (or create) an entry in the tocsave hash table. */
6857 static struct tocsave_entry *
6858 tocsave_find (struct ppc_link_hash_table *htab,
6859 enum insert_option insert,
6860 Elf_Internal_Sym **local_syms,
6861 const Elf_Internal_Rela *irela,
6864 unsigned long r_indx;
6865 struct elf_link_hash_entry *h;
6866 Elf_Internal_Sym *sym;
6867 struct tocsave_entry ent, *p;
6869 struct tocsave_entry **slot;
6871 r_indx = ELF64_R_SYM (irela->r_info);
6872 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6874 if (ent.sec == NULL || ent.sec->output_section == NULL)
6876 (*_bfd_error_handler)
6877 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6882 ent.offset = h->root.u.def.value;
6884 ent.offset = sym->st_value;
6885 ent.offset += irela->r_addend;
6887 hash = tocsave_htab_hash (&ent);
6888 slot = ((struct tocsave_entry **)
6889 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6895 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6904 /* Adjust all global syms defined in opd sections. In gcc generated
6905 code for the old ABI, these will already have been done. */
6908 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6910 struct ppc_link_hash_entry *eh;
6912 struct _opd_sec_data *opd;
6914 if (h->root.type == bfd_link_hash_indirect)
6917 if (h->root.type != bfd_link_hash_defined
6918 && h->root.type != bfd_link_hash_defweak)
6921 eh = (struct ppc_link_hash_entry *) h;
6922 if (eh->adjust_done)
6925 sym_sec = eh->elf.root.u.def.section;
6926 opd = get_opd_info (sym_sec);
6927 if (opd != NULL && opd->adjust != NULL)
6929 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6932 /* This entry has been deleted. */
6933 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6936 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6937 if (discarded_section (dsec))
6939 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6943 eh->elf.root.u.def.value = 0;
6944 eh->elf.root.u.def.section = dsec;
6947 eh->elf.root.u.def.value += adjust;
6948 eh->adjust_done = 1;
6953 /* Handles decrementing dynamic reloc counts for the reloc specified by
6954 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6955 have already been determined. */
6958 dec_dynrel_count (bfd_vma r_info,
6960 struct bfd_link_info *info,
6961 Elf_Internal_Sym **local_syms,
6962 struct elf_link_hash_entry *h,
6965 enum elf_ppc64_reloc_type r_type;
6966 struct elf_dyn_relocs *p;
6967 struct elf_dyn_relocs **pp;
6969 /* Can this reloc be dynamic? This switch, and later tests here
6970 should be kept in sync with the code in check_relocs. */
6971 r_type = ELF64_R_TYPE (r_info);
6977 case R_PPC64_TPREL16:
6978 case R_PPC64_TPREL16_LO:
6979 case R_PPC64_TPREL16_HI:
6980 case R_PPC64_TPREL16_HA:
6981 case R_PPC64_TPREL16_DS:
6982 case R_PPC64_TPREL16_LO_DS:
6983 case R_PPC64_TPREL16_HIGHER:
6984 case R_PPC64_TPREL16_HIGHERA:
6985 case R_PPC64_TPREL16_HIGHEST:
6986 case R_PPC64_TPREL16_HIGHESTA:
6990 case R_PPC64_TPREL64:
6991 case R_PPC64_DTPMOD64:
6992 case R_PPC64_DTPREL64:
6993 case R_PPC64_ADDR64:
6997 case R_PPC64_ADDR14:
6998 case R_PPC64_ADDR14_BRNTAKEN:
6999 case R_PPC64_ADDR14_BRTAKEN:
7000 case R_PPC64_ADDR16:
7001 case R_PPC64_ADDR16_DS:
7002 case R_PPC64_ADDR16_HA:
7003 case R_PPC64_ADDR16_HI:
7004 case R_PPC64_ADDR16_HIGHER:
7005 case R_PPC64_ADDR16_HIGHERA:
7006 case R_PPC64_ADDR16_HIGHEST:
7007 case R_PPC64_ADDR16_HIGHESTA:
7008 case R_PPC64_ADDR16_LO:
7009 case R_PPC64_ADDR16_LO_DS:
7010 case R_PPC64_ADDR24:
7011 case R_PPC64_ADDR32:
7012 case R_PPC64_UADDR16:
7013 case R_PPC64_UADDR32:
7014 case R_PPC64_UADDR64:
7019 if (local_syms != NULL)
7021 unsigned long r_symndx;
7022 Elf_Internal_Sym *sym;
7023 bfd *ibfd = sec->owner;
7025 r_symndx = ELF64_R_SYM (r_info);
7026 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7031 && (must_be_dyn_reloc (info, r_type)
7034 || h->root.type == bfd_link_hash_defweak
7035 || !h->def_regular))))
7036 || (ELIMINATE_COPY_RELOCS
7039 && (h->root.type == bfd_link_hash_defweak
7040 || !h->def_regular)))
7046 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7049 if (sym_sec != NULL)
7051 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
7052 pp = (struct elf_dyn_relocs **) vpp;
7056 void *vpp = &elf_section_data (sec)->local_dynrel;
7057 pp = (struct elf_dyn_relocs **) vpp;
7061 /* elf_gc_sweep may have already removed all dyn relocs associated
7062 with local syms for a given section. Also, symbol flags are
7063 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7064 report a dynreloc miscount. */
7065 if (*pp == NULL && info->gc_sections)
7068 while ((p = *pp) != NULL)
7072 if (!must_be_dyn_reloc (info, r_type))
7082 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7084 bfd_set_error (bfd_error_bad_value);
7088 /* Remove unused Official Procedure Descriptor entries. Currently we
7089 only remove those associated with functions in discarded link-once
7090 sections, or weakly defined functions that have been overridden. It
7091 would be possible to remove many more entries for statically linked
7095 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7098 bfd_boolean some_edited = FALSE;
7099 asection *need_pad = NULL;
7101 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7104 Elf_Internal_Rela *relstart, *rel, *relend;
7105 Elf_Internal_Shdr *symtab_hdr;
7106 Elf_Internal_Sym *local_syms;
7108 struct _opd_sec_data *opd;
7109 bfd_boolean need_edit, add_aux_fields;
7110 bfd_size_type cnt_16b = 0;
7112 if (!is_ppc64_elf (ibfd))
7115 sec = bfd_get_section_by_name (ibfd, ".opd");
7116 if (sec == NULL || sec->size == 0)
7119 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7122 if (sec->output_section == bfd_abs_section_ptr)
7125 /* Look through the section relocs. */
7126 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7130 symtab_hdr = &elf_symtab_hdr (ibfd);
7132 /* Read the relocations. */
7133 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7135 if (relstart == NULL)
7138 /* First run through the relocs to check they are sane, and to
7139 determine whether we need to edit this opd section. */
7143 relend = relstart + sec->reloc_count;
7144 for (rel = relstart; rel < relend; )
7146 enum elf_ppc64_reloc_type r_type;
7147 unsigned long r_symndx;
7149 struct elf_link_hash_entry *h;
7150 Elf_Internal_Sym *sym;
7152 /* .opd contains a regular array of 16 or 24 byte entries. We're
7153 only interested in the reloc pointing to a function entry
7155 if (rel->r_offset != offset
7156 || rel + 1 >= relend
7157 || (rel + 1)->r_offset != offset + 8)
7159 /* If someone messes with .opd alignment then after a
7160 "ld -r" we might have padding in the middle of .opd.
7161 Also, there's nothing to prevent someone putting
7162 something silly in .opd with the assembler. No .opd
7163 optimization for them! */
7165 (*_bfd_error_handler)
7166 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7171 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7172 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7174 (*_bfd_error_handler)
7175 (_("%B: unexpected reloc type %u in .opd section"),
7181 r_symndx = ELF64_R_SYM (rel->r_info);
7182 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7186 if (sym_sec == NULL || sym_sec->owner == NULL)
7188 const char *sym_name;
7190 sym_name = h->root.root.string;
7192 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7195 (*_bfd_error_handler)
7196 (_("%B: undefined sym `%s' in .opd section"),
7202 /* opd entries are always for functions defined in the
7203 current input bfd. If the symbol isn't defined in the
7204 input bfd, then we won't be using the function in this
7205 bfd; It must be defined in a linkonce section in another
7206 bfd, or is weak. It's also possible that we are
7207 discarding the function due to a linker script /DISCARD/,
7208 which we test for via the output_section. */
7209 if (sym_sec->owner != ibfd
7210 || sym_sec->output_section == bfd_abs_section_ptr)
7215 || (rel + 1 == relend && rel->r_offset == offset + 16))
7217 if (sec->size == offset + 24)
7222 if (rel == relend && sec->size == offset + 16)
7230 if (rel->r_offset == offset + 24)
7232 else if (rel->r_offset != offset + 16)
7234 else if (rel + 1 < relend
7235 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7236 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7241 else if (rel + 2 < relend
7242 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7243 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7252 add_aux_fields = non_overlapping && cnt_16b > 0;
7254 if (need_edit || add_aux_fields)
7256 Elf_Internal_Rela *write_rel;
7257 Elf_Internal_Shdr *rel_hdr;
7258 bfd_byte *rptr, *wptr;
7259 bfd_byte *new_contents;
7264 new_contents = NULL;
7265 amt = sec->size * sizeof (long) / 8;
7266 opd = &ppc64_elf_section_data (sec)->u.opd;
7267 opd->adjust = bfd_zalloc (sec->owner, amt);
7268 if (opd->adjust == NULL)
7270 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7272 /* This seems a waste of time as input .opd sections are all
7273 zeros as generated by gcc, but I suppose there's no reason
7274 this will always be so. We might start putting something in
7275 the third word of .opd entries. */
7276 if ((sec->flags & SEC_IN_MEMORY) == 0)
7279 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7284 if (local_syms != NULL
7285 && symtab_hdr->contents != (unsigned char *) local_syms)
7287 if (elf_section_data (sec)->relocs != relstart)
7291 sec->contents = loc;
7292 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7295 elf_section_data (sec)->relocs = relstart;
7297 new_contents = sec->contents;
7300 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7301 if (new_contents == NULL)
7305 wptr = new_contents;
7306 rptr = sec->contents;
7308 write_rel = relstart;
7312 for (rel = relstart; rel < relend; rel++)
7314 unsigned long r_symndx;
7316 struct elf_link_hash_entry *h;
7317 Elf_Internal_Sym *sym;
7319 r_symndx = ELF64_R_SYM (rel->r_info);
7320 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7324 if (rel->r_offset == offset)
7326 struct ppc_link_hash_entry *fdh = NULL;
7328 /* See if the .opd entry is full 24 byte or
7329 16 byte (with fd_aux entry overlapped with next
7332 if ((rel + 2 == relend && sec->size == offset + 16)
7333 || (rel + 3 < relend
7334 && rel[2].r_offset == offset + 16
7335 && rel[3].r_offset == offset + 24
7336 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7337 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7341 && h->root.root.string[0] == '.')
7343 struct ppc_link_hash_table *htab;
7345 htab = ppc_hash_table (info);
7347 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7350 && fdh->elf.root.type != bfd_link_hash_defined
7351 && fdh->elf.root.type != bfd_link_hash_defweak)
7355 skip = (sym_sec->owner != ibfd
7356 || sym_sec->output_section == bfd_abs_section_ptr);
7359 if (fdh != NULL && sym_sec->owner == ibfd)
7361 /* Arrange for the function descriptor sym
7363 fdh->elf.root.u.def.value = 0;
7364 fdh->elf.root.u.def.section = sym_sec;
7366 opd->adjust[rel->r_offset / 8] = -1;
7370 /* We'll be keeping this opd entry. */
7374 /* Redefine the function descriptor symbol to
7375 this location in the opd section. It is
7376 necessary to update the value here rather
7377 than using an array of adjustments as we do
7378 for local symbols, because various places
7379 in the generic ELF code use the value
7380 stored in u.def.value. */
7381 fdh->elf.root.u.def.value = wptr - new_contents;
7382 fdh->adjust_done = 1;
7385 /* Local syms are a bit tricky. We could
7386 tweak them as they can be cached, but
7387 we'd need to look through the local syms
7388 for the function descriptor sym which we
7389 don't have at the moment. So keep an
7390 array of adjustments. */
7391 opd->adjust[rel->r_offset / 8]
7392 = (wptr - new_contents) - (rptr - sec->contents);
7395 memcpy (wptr, rptr, opd_ent_size);
7396 wptr += opd_ent_size;
7397 if (add_aux_fields && opd_ent_size == 16)
7399 memset (wptr, '\0', 8);
7403 rptr += opd_ent_size;
7404 offset += opd_ent_size;
7410 && !info->relocatable
7411 && !dec_dynrel_count (rel->r_info, sec, info,
7417 /* We need to adjust any reloc offsets to point to the
7418 new opd entries. While we're at it, we may as well
7419 remove redundant relocs. */
7420 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7421 if (write_rel != rel)
7422 memcpy (write_rel, rel, sizeof (*rel));
7427 sec->size = wptr - new_contents;
7428 sec->reloc_count = write_rel - relstart;
7431 free (sec->contents);
7432 sec->contents = new_contents;
7435 /* Fudge the header size too, as this is used later in
7436 elf_bfd_final_link if we are emitting relocs. */
7437 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7438 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7441 else if (elf_section_data (sec)->relocs != relstart)
7444 if (local_syms != NULL
7445 && symtab_hdr->contents != (unsigned char *) local_syms)
7447 if (!info->keep_memory)
7450 symtab_hdr->contents = (unsigned char *) local_syms;
7455 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7457 /* If we are doing a final link and the last .opd entry is just 16 byte
7458 long, add a 8 byte padding after it. */
7459 if (need_pad != NULL && !info->relocatable)
7463 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7465 BFD_ASSERT (need_pad->size > 0);
7467 p = bfd_malloc (need_pad->size + 8);
7471 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7472 p, 0, need_pad->size))
7475 need_pad->contents = p;
7476 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7480 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7484 need_pad->contents = p;
7487 memset (need_pad->contents + need_pad->size, 0, 8);
7488 need_pad->size += 8;
7494 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7497 ppc64_elf_tls_setup (struct bfd_link_info *info,
7498 int no_tls_get_addr_opt,
7501 struct ppc_link_hash_table *htab;
7503 htab = ppc_hash_table (info);
7508 htab->do_multi_toc = 0;
7509 else if (!htab->do_multi_toc)
7512 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7513 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7514 FALSE, FALSE, TRUE));
7515 /* Move dynamic linking info to the function descriptor sym. */
7516 if (htab->tls_get_addr != NULL)
7517 func_desc_adjust (&htab->tls_get_addr->elf, info);
7518 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7519 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7520 FALSE, FALSE, TRUE));
7521 if (!no_tls_get_addr_opt)
7523 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7525 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7526 FALSE, FALSE, TRUE);
7528 func_desc_adjust (opt, info);
7529 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7530 FALSE, FALSE, TRUE);
7532 && (opt_fd->root.type == bfd_link_hash_defined
7533 || opt_fd->root.type == bfd_link_hash_defweak))
7535 /* If glibc supports an optimized __tls_get_addr call stub,
7536 signalled by the presence of __tls_get_addr_opt, and we'll
7537 be calling __tls_get_addr via a plt call stub, then
7538 make __tls_get_addr point to __tls_get_addr_opt. */
7539 tga_fd = &htab->tls_get_addr_fd->elf;
7540 if (htab->elf.dynamic_sections_created
7542 && (tga_fd->type == STT_FUNC
7543 || tga_fd->needs_plt)
7544 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7545 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7546 && tga_fd->root.type == bfd_link_hash_undefweak)))
7548 struct plt_entry *ent;
7550 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7551 if (ent->plt.refcount > 0)
7555 tga_fd->root.type = bfd_link_hash_indirect;
7556 tga_fd->root.u.i.link = &opt_fd->root;
7557 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7558 if (opt_fd->dynindx != -1)
7560 /* Use __tls_get_addr_opt in dynamic relocations. */
7561 opt_fd->dynindx = -1;
7562 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7563 opt_fd->dynstr_index);
7564 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7567 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7568 tga = &htab->tls_get_addr->elf;
7569 if (opt != NULL && tga != NULL)
7571 tga->root.type = bfd_link_hash_indirect;
7572 tga->root.u.i.link = &opt->root;
7573 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7574 _bfd_elf_link_hash_hide_symbol (info, opt,
7576 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7578 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7579 htab->tls_get_addr_fd->is_func_descriptor = 1;
7580 if (htab->tls_get_addr != NULL)
7582 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7583 htab->tls_get_addr->is_func = 1;
7589 no_tls_get_addr_opt = TRUE;
7591 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7592 return _bfd_elf_tls_setup (info->output_bfd, info);
7595 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7599 branch_reloc_hash_match (const bfd *ibfd,
7600 const Elf_Internal_Rela *rel,
7601 const struct ppc_link_hash_entry *hash1,
7602 const struct ppc_link_hash_entry *hash2)
7604 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7605 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7606 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7608 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7610 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7611 struct elf_link_hash_entry *h;
7613 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7614 h = elf_follow_link (h);
7615 if (h == &hash1->elf || h == &hash2->elf)
7621 /* Run through all the TLS relocs looking for optimization
7622 opportunities. The linker has been hacked (see ppc64elf.em) to do
7623 a preliminary section layout so that we know the TLS segment
7624 offsets. We can't optimize earlier because some optimizations need
7625 to know the tp offset, and we need to optimize before allocating
7626 dynamic relocations. */
7629 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7633 struct ppc_link_hash_table *htab;
7634 unsigned char *toc_ref;
7637 if (info->relocatable || !info->executable)
7640 htab = ppc_hash_table (info);
7644 /* Make two passes over the relocs. On the first pass, mark toc
7645 entries involved with tls relocs, and check that tls relocs
7646 involved in setting up a tls_get_addr call are indeed followed by
7647 such a call. If they are not, we can't do any tls optimization.
7648 On the second pass twiddle tls_mask flags to notify
7649 relocate_section that optimization can be done, and adjust got
7650 and plt refcounts. */
7652 for (pass = 0; pass < 2; ++pass)
7653 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7655 Elf_Internal_Sym *locsyms = NULL;
7656 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7658 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7659 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7661 Elf_Internal_Rela *relstart, *rel, *relend;
7662 bfd_boolean found_tls_get_addr_arg = 0;
7664 /* Read the relocations. */
7665 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7667 if (relstart == NULL)
7670 relend = relstart + sec->reloc_count;
7671 for (rel = relstart; rel < relend; rel++)
7673 enum elf_ppc64_reloc_type r_type;
7674 unsigned long r_symndx;
7675 struct elf_link_hash_entry *h;
7676 Elf_Internal_Sym *sym;
7678 unsigned char *tls_mask;
7679 unsigned char tls_set, tls_clear, tls_type = 0;
7681 bfd_boolean ok_tprel, is_local;
7682 long toc_ref_index = 0;
7683 int expecting_tls_get_addr = 0;
7684 bfd_boolean ret = FALSE;
7686 r_symndx = ELF64_R_SYM (rel->r_info);
7687 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7691 if (elf_section_data (sec)->relocs != relstart)
7693 if (toc_ref != NULL)
7696 && (elf_symtab_hdr (ibfd).contents
7697 != (unsigned char *) locsyms))
7704 if (h->root.type == bfd_link_hash_defined
7705 || h->root.type == bfd_link_hash_defweak)
7706 value = h->root.u.def.value;
7707 else if (h->root.type == bfd_link_hash_undefweak)
7711 found_tls_get_addr_arg = 0;
7716 /* Symbols referenced by TLS relocs must be of type
7717 STT_TLS. So no need for .opd local sym adjust. */
7718 value = sym->st_value;
7727 && h->root.type == bfd_link_hash_undefweak)
7731 value += sym_sec->output_offset;
7732 value += sym_sec->output_section->vma;
7733 value -= htab->elf.tls_sec->vma;
7734 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7735 < (bfd_vma) 1 << 32);
7739 r_type = ELF64_R_TYPE (rel->r_info);
7740 /* If this section has old-style __tls_get_addr calls
7741 without marker relocs, then check that each
7742 __tls_get_addr call reloc is preceded by a reloc
7743 that conceivably belongs to the __tls_get_addr arg
7744 setup insn. If we don't find matching arg setup
7745 relocs, don't do any tls optimization. */
7747 && sec->has_tls_get_addr_call
7749 && (h == &htab->tls_get_addr->elf
7750 || h == &htab->tls_get_addr_fd->elf)
7751 && !found_tls_get_addr_arg
7752 && is_branch_reloc (r_type))
7754 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7755 "TLS optimization disabled\n"),
7756 ibfd, sec, rel->r_offset);
7761 found_tls_get_addr_arg = 0;
7764 case R_PPC64_GOT_TLSLD16:
7765 case R_PPC64_GOT_TLSLD16_LO:
7766 expecting_tls_get_addr = 1;
7767 found_tls_get_addr_arg = 1;
7770 case R_PPC64_GOT_TLSLD16_HI:
7771 case R_PPC64_GOT_TLSLD16_HA:
7772 /* These relocs should never be against a symbol
7773 defined in a shared lib. Leave them alone if
7774 that turns out to be the case. */
7781 tls_type = TLS_TLS | TLS_LD;
7784 case R_PPC64_GOT_TLSGD16:
7785 case R_PPC64_GOT_TLSGD16_LO:
7786 expecting_tls_get_addr = 1;
7787 found_tls_get_addr_arg = 1;
7790 case R_PPC64_GOT_TLSGD16_HI:
7791 case R_PPC64_GOT_TLSGD16_HA:
7797 tls_set = TLS_TLS | TLS_TPRELGD;
7799 tls_type = TLS_TLS | TLS_GD;
7802 case R_PPC64_GOT_TPREL16_DS:
7803 case R_PPC64_GOT_TPREL16_LO_DS:
7804 case R_PPC64_GOT_TPREL16_HI:
7805 case R_PPC64_GOT_TPREL16_HA:
7810 tls_clear = TLS_TPREL;
7811 tls_type = TLS_TLS | TLS_TPREL;
7818 found_tls_get_addr_arg = 1;
7823 case R_PPC64_TOC16_LO:
7824 if (sym_sec == NULL || sym_sec != toc)
7827 /* Mark this toc entry as referenced by a TLS
7828 code sequence. We can do that now in the
7829 case of R_PPC64_TLS, and after checking for
7830 tls_get_addr for the TOC16 relocs. */
7831 if (toc_ref == NULL)
7832 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7833 if (toc_ref == NULL)
7837 value = h->root.u.def.value;
7839 value = sym->st_value;
7840 value += rel->r_addend;
7841 BFD_ASSERT (value < toc->size && value % 8 == 0);
7842 toc_ref_index = (value + toc->output_offset) / 8;
7843 if (r_type == R_PPC64_TLS
7844 || r_type == R_PPC64_TLSGD
7845 || r_type == R_PPC64_TLSLD)
7847 toc_ref[toc_ref_index] = 1;
7851 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7856 expecting_tls_get_addr = 2;
7859 case R_PPC64_TPREL64:
7863 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7868 tls_set = TLS_EXPLICIT;
7869 tls_clear = TLS_TPREL;
7874 case R_PPC64_DTPMOD64:
7878 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7880 if (rel + 1 < relend
7882 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7883 && rel[1].r_offset == rel->r_offset + 8)
7887 tls_set = TLS_EXPLICIT | TLS_GD;
7890 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7899 tls_set = TLS_EXPLICIT;
7910 if (!expecting_tls_get_addr
7911 || !sec->has_tls_get_addr_call)
7914 if (rel + 1 < relend
7915 && branch_reloc_hash_match (ibfd, rel + 1,
7917 htab->tls_get_addr_fd))
7919 if (expecting_tls_get_addr == 2)
7921 /* Check for toc tls entries. */
7922 unsigned char *toc_tls;
7925 retval = get_tls_mask (&toc_tls, NULL, NULL,
7930 if (toc_tls != NULL)
7932 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
7933 found_tls_get_addr_arg = 1;
7935 toc_ref[toc_ref_index] = 1;
7941 if (expecting_tls_get_addr != 1)
7944 /* Uh oh, we didn't find the expected call. We
7945 could just mark this symbol to exclude it
7946 from tls optimization but it's safer to skip
7947 the entire optimization. */
7948 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
7949 "TLS optimization disabled\n"),
7950 ibfd, sec, rel->r_offset);
7955 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7957 struct plt_entry *ent;
7958 for (ent = htab->tls_get_addr->elf.plt.plist;
7961 if (ent->addend == 0)
7963 if (ent->plt.refcount > 0)
7965 ent->plt.refcount -= 1;
7966 expecting_tls_get_addr = 0;
7972 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7974 struct plt_entry *ent;
7975 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7978 if (ent->addend == 0)
7980 if (ent->plt.refcount > 0)
7981 ent->plt.refcount -= 1;
7989 if ((tls_set & TLS_EXPLICIT) == 0)
7991 struct got_entry *ent;
7993 /* Adjust got entry for this reloc. */
7997 ent = elf_local_got_ents (ibfd)[r_symndx];
7999 for (; ent != NULL; ent = ent->next)
8000 if (ent->addend == rel->r_addend
8001 && ent->owner == ibfd
8002 && ent->tls_type == tls_type)
8009 /* We managed to get rid of a got entry. */
8010 if (ent->got.refcount > 0)
8011 ent->got.refcount -= 1;
8016 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8017 we'll lose one or two dyn relocs. */
8018 if (!dec_dynrel_count (rel->r_info, sec, info,
8022 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8024 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8030 *tls_mask |= tls_set;
8031 *tls_mask &= ~tls_clear;
8034 if (elf_section_data (sec)->relocs != relstart)
8039 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8041 if (!info->keep_memory)
8044 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8048 if (toc_ref != NULL)
8053 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8054 the values of any global symbols in a toc section that has been
8055 edited. Globals in toc sections should be a rarity, so this function
8056 sets a flag if any are found in toc sections other than the one just
8057 edited, so that futher hash table traversals can be avoided. */
8059 struct adjust_toc_info
8062 unsigned long *skip;
8063 bfd_boolean global_toc_syms;
8066 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8069 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8071 struct ppc_link_hash_entry *eh;
8072 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8075 if (h->root.type != bfd_link_hash_defined
8076 && h->root.type != bfd_link_hash_defweak)
8079 eh = (struct ppc_link_hash_entry *) h;
8080 if (eh->adjust_done)
8083 if (eh->elf.root.u.def.section == toc_inf->toc)
8085 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8086 i = toc_inf->toc->rawsize >> 3;
8088 i = eh->elf.root.u.def.value >> 3;
8090 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8092 (*_bfd_error_handler)
8093 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8096 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8097 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8100 eh->elf.root.u.def.value -= toc_inf->skip[i];
8101 eh->adjust_done = 1;
8103 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8104 toc_inf->global_toc_syms = TRUE;
8109 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8112 ok_lo_toc_insn (unsigned int insn)
8114 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8115 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8116 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8117 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8118 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8119 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8120 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8121 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8122 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8123 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8124 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8125 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8126 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8127 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8128 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8130 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8131 && ((insn & 3) == 0 || (insn & 3) == 3))
8132 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8135 /* Examine all relocs referencing .toc sections in order to remove
8136 unused .toc entries. */
8139 ppc64_elf_edit_toc (struct bfd_link_info *info)
8142 struct adjust_toc_info toc_inf;
8143 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8145 htab->do_toc_opt = 1;
8146 toc_inf.global_toc_syms = TRUE;
8147 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8149 asection *toc, *sec;
8150 Elf_Internal_Shdr *symtab_hdr;
8151 Elf_Internal_Sym *local_syms;
8152 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8153 unsigned long *skip, *drop;
8154 unsigned char *used;
8155 unsigned char *keep, last, some_unused;
8157 if (!is_ppc64_elf (ibfd))
8160 toc = bfd_get_section_by_name (ibfd, ".toc");
8163 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8164 || discarded_section (toc))
8169 symtab_hdr = &elf_symtab_hdr (ibfd);
8171 /* Look at sections dropped from the final link. */
8174 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8176 if (sec->reloc_count == 0
8177 || !discarded_section (sec)
8178 || get_opd_info (sec)
8179 || (sec->flags & SEC_ALLOC) == 0
8180 || (sec->flags & SEC_DEBUGGING) != 0)
8183 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8184 if (relstart == NULL)
8187 /* Run through the relocs to see which toc entries might be
8189 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8191 enum elf_ppc64_reloc_type r_type;
8192 unsigned long r_symndx;
8194 struct elf_link_hash_entry *h;
8195 Elf_Internal_Sym *sym;
8198 r_type = ELF64_R_TYPE (rel->r_info);
8205 case R_PPC64_TOC16_LO:
8206 case R_PPC64_TOC16_HI:
8207 case R_PPC64_TOC16_HA:
8208 case R_PPC64_TOC16_DS:
8209 case R_PPC64_TOC16_LO_DS:
8213 r_symndx = ELF64_R_SYM (rel->r_info);
8214 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8222 val = h->root.u.def.value;
8224 val = sym->st_value;
8225 val += rel->r_addend;
8227 if (val >= toc->size)
8230 /* Anything in the toc ought to be aligned to 8 bytes.
8231 If not, don't mark as unused. */
8237 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8242 skip[val >> 3] = ref_from_discarded;
8245 if (elf_section_data (sec)->relocs != relstart)
8249 /* For largetoc loads of address constants, we can convert
8250 . addis rx,2,addr@got@ha
8251 . ld ry,addr@got@l(rx)
8253 . addis rx,2,addr@toc@ha
8254 . addi ry,rx,addr@toc@l
8255 when addr is within 2G of the toc pointer. This then means
8256 that the word storing "addr" in the toc is no longer needed. */
8258 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8259 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8260 && toc->reloc_count != 0)
8262 /* Read toc relocs. */
8263 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8265 if (toc_relocs == NULL)
8268 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8270 enum elf_ppc64_reloc_type r_type;
8271 unsigned long r_symndx;
8273 struct elf_link_hash_entry *h;
8274 Elf_Internal_Sym *sym;
8277 r_type = ELF64_R_TYPE (rel->r_info);
8278 if (r_type != R_PPC64_ADDR64)
8281 r_symndx = ELF64_R_SYM (rel->r_info);
8282 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8287 || discarded_section (sym_sec))
8290 if (!SYMBOL_CALLS_LOCAL (info, h))
8295 if (h->type == STT_GNU_IFUNC)
8297 val = h->root.u.def.value;
8301 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8303 val = sym->st_value;
8305 val += rel->r_addend;
8306 val += sym_sec->output_section->vma + sym_sec->output_offset;
8308 /* We don't yet know the exact toc pointer value, but we
8309 know it will be somewhere in the toc section. Don't
8310 optimize if the difference from any possible toc
8311 pointer is outside [ff..f80008000, 7fff7fff]. */
8312 addr = toc->output_section->vma + TOC_BASE_OFF;
8313 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8316 addr = toc->output_section->vma + toc->output_section->rawsize;
8317 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8322 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8327 skip[rel->r_offset >> 3]
8328 |= can_optimize | ((rel - toc_relocs) << 2);
8335 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8339 if (local_syms != NULL
8340 && symtab_hdr->contents != (unsigned char *) local_syms)
8344 && elf_section_data (sec)->relocs != relstart)
8346 if (toc_relocs != NULL
8347 && elf_section_data (toc)->relocs != toc_relocs)
8354 /* Now check all kept sections that might reference the toc.
8355 Check the toc itself last. */
8356 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8359 sec = (sec == toc ? NULL
8360 : sec->next == NULL ? toc
8361 : sec->next == toc && toc->next ? toc->next
8366 if (sec->reloc_count == 0
8367 || discarded_section (sec)
8368 || get_opd_info (sec)
8369 || (sec->flags & SEC_ALLOC) == 0
8370 || (sec->flags & SEC_DEBUGGING) != 0)
8373 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8375 if (relstart == NULL)
8378 /* Mark toc entries referenced as used. */
8382 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8384 enum elf_ppc64_reloc_type r_type;
8385 unsigned long r_symndx;
8387 struct elf_link_hash_entry *h;
8388 Elf_Internal_Sym *sym;
8390 enum {no_check, check_lo, check_ha} insn_check;
8392 r_type = ELF64_R_TYPE (rel->r_info);
8396 insn_check = no_check;
8399 case R_PPC64_GOT_TLSLD16_HA:
8400 case R_PPC64_GOT_TLSGD16_HA:
8401 case R_PPC64_GOT_TPREL16_HA:
8402 case R_PPC64_GOT_DTPREL16_HA:
8403 case R_PPC64_GOT16_HA:
8404 case R_PPC64_TOC16_HA:
8405 insn_check = check_ha;
8408 case R_PPC64_GOT_TLSLD16_LO:
8409 case R_PPC64_GOT_TLSGD16_LO:
8410 case R_PPC64_GOT_TPREL16_LO_DS:
8411 case R_PPC64_GOT_DTPREL16_LO_DS:
8412 case R_PPC64_GOT16_LO:
8413 case R_PPC64_GOT16_LO_DS:
8414 case R_PPC64_TOC16_LO:
8415 case R_PPC64_TOC16_LO_DS:
8416 insn_check = check_lo;
8420 if (insn_check != no_check)
8422 bfd_vma off = rel->r_offset & ~3;
8423 unsigned char buf[4];
8426 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8431 insn = bfd_get_32 (ibfd, buf);
8432 if (insn_check == check_lo
8433 ? !ok_lo_toc_insn (insn)
8434 : ((insn & ((0x3f << 26) | 0x1f << 16))
8435 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8439 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8440 sprintf (str, "%#08x", insn);
8441 info->callbacks->einfo
8442 (_("%P: %H: toc optimization is not supported for"
8443 " %s instruction.\n"),
8444 ibfd, sec, rel->r_offset & ~3, str);
8451 case R_PPC64_TOC16_LO:
8452 case R_PPC64_TOC16_HI:
8453 case R_PPC64_TOC16_HA:
8454 case R_PPC64_TOC16_DS:
8455 case R_PPC64_TOC16_LO_DS:
8456 /* In case we're taking addresses of toc entries. */
8457 case R_PPC64_ADDR64:
8464 r_symndx = ELF64_R_SYM (rel->r_info);
8465 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8476 val = h->root.u.def.value;
8478 val = sym->st_value;
8479 val += rel->r_addend;
8481 if (val >= toc->size)
8484 if ((skip[val >> 3] & can_optimize) != 0)
8491 case R_PPC64_TOC16_HA:
8494 case R_PPC64_TOC16_LO_DS:
8495 off = rel->r_offset;
8496 off += (bfd_big_endian (ibfd) ? -2 : 3);
8497 if (!bfd_get_section_contents (ibfd, sec, &opc,
8503 if ((opc & (0x3f << 2)) == (58u << 2))
8508 /* Wrong sort of reloc, or not a ld. We may
8509 as well clear ref_from_discarded too. */
8516 /* For the toc section, we only mark as used if this
8517 entry itself isn't unused. */
8518 else if ((used[rel->r_offset >> 3]
8519 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8522 /* Do all the relocs again, to catch reference
8531 if (elf_section_data (sec)->relocs != relstart)
8535 /* Merge the used and skip arrays. Assume that TOC
8536 doublewords not appearing as either used or unused belong
8537 to to an entry more than one doubleword in size. */
8538 for (drop = skip, keep = used, last = 0, some_unused = 0;
8539 drop < skip + (toc->size + 7) / 8;
8544 *drop &= ~ref_from_discarded;
8545 if ((*drop & can_optimize) != 0)
8549 else if ((*drop & ref_from_discarded) != 0)
8552 last = ref_from_discarded;
8562 bfd_byte *contents, *src;
8564 Elf_Internal_Sym *sym;
8565 bfd_boolean local_toc_syms = FALSE;
8567 /* Shuffle the toc contents, and at the same time convert the
8568 skip array from booleans into offsets. */
8569 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8572 elf_section_data (toc)->this_hdr.contents = contents;
8574 for (src = contents, off = 0, drop = skip;
8575 src < contents + toc->size;
8578 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8583 memcpy (src - off, src, 8);
8587 toc->rawsize = toc->size;
8588 toc->size = src - contents - off;
8590 /* Adjust addends for relocs against the toc section sym,
8591 and optimize any accesses we can. */
8592 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8594 if (sec->reloc_count == 0
8595 || discarded_section (sec))
8598 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8600 if (relstart == NULL)
8603 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8605 enum elf_ppc64_reloc_type r_type;
8606 unsigned long r_symndx;
8608 struct elf_link_hash_entry *h;
8611 r_type = ELF64_R_TYPE (rel->r_info);
8618 case R_PPC64_TOC16_LO:
8619 case R_PPC64_TOC16_HI:
8620 case R_PPC64_TOC16_HA:
8621 case R_PPC64_TOC16_DS:
8622 case R_PPC64_TOC16_LO_DS:
8623 case R_PPC64_ADDR64:
8627 r_symndx = ELF64_R_SYM (rel->r_info);
8628 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8636 val = h->root.u.def.value;
8639 val = sym->st_value;
8641 local_toc_syms = TRUE;
8644 val += rel->r_addend;
8646 if (val > toc->rawsize)
8648 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8650 else if ((skip[val >> 3] & can_optimize) != 0)
8652 Elf_Internal_Rela *tocrel
8653 = toc_relocs + (skip[val >> 3] >> 2);
8654 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8658 case R_PPC64_TOC16_HA:
8659 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8662 case R_PPC64_TOC16_LO_DS:
8663 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8667 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8669 info->callbacks->einfo
8670 (_("%P: %H: %s references "
8671 "optimized away TOC entry\n"),
8672 ibfd, sec, rel->r_offset,
8673 ppc64_elf_howto_table[r_type]->name);
8674 bfd_set_error (bfd_error_bad_value);
8677 rel->r_addend = tocrel->r_addend;
8678 elf_section_data (sec)->relocs = relstart;
8682 if (h != NULL || sym->st_value != 0)
8685 rel->r_addend -= skip[val >> 3];
8686 elf_section_data (sec)->relocs = relstart;
8689 if (elf_section_data (sec)->relocs != relstart)
8693 /* We shouldn't have local or global symbols defined in the TOC,
8694 but handle them anyway. */
8695 if (local_syms != NULL)
8696 for (sym = local_syms;
8697 sym < local_syms + symtab_hdr->sh_info;
8699 if (sym->st_value != 0
8700 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8704 if (sym->st_value > toc->rawsize)
8705 i = toc->rawsize >> 3;
8707 i = sym->st_value >> 3;
8709 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8712 (*_bfd_error_handler)
8713 (_("%s defined on removed toc entry"),
8714 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8717 while ((skip[i] & (ref_from_discarded | can_optimize)));
8718 sym->st_value = (bfd_vma) i << 3;
8721 sym->st_value -= skip[i];
8722 symtab_hdr->contents = (unsigned char *) local_syms;
8725 /* Adjust any global syms defined in this toc input section. */
8726 if (toc_inf.global_toc_syms)
8729 toc_inf.skip = skip;
8730 toc_inf.global_toc_syms = FALSE;
8731 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8735 if (toc->reloc_count != 0)
8737 Elf_Internal_Shdr *rel_hdr;
8738 Elf_Internal_Rela *wrel;
8741 /* Remove unused toc relocs, and adjust those we keep. */
8742 if (toc_relocs == NULL)
8743 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8745 if (toc_relocs == NULL)
8749 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8750 if ((skip[rel->r_offset >> 3]
8751 & (ref_from_discarded | can_optimize)) == 0)
8753 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8754 wrel->r_info = rel->r_info;
8755 wrel->r_addend = rel->r_addend;
8758 else if (!dec_dynrel_count (rel->r_info, toc, info,
8759 &local_syms, NULL, NULL))
8762 elf_section_data (toc)->relocs = toc_relocs;
8763 toc->reloc_count = wrel - toc_relocs;
8764 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8765 sz = rel_hdr->sh_entsize;
8766 rel_hdr->sh_size = toc->reloc_count * sz;
8769 else if (toc_relocs != NULL
8770 && elf_section_data (toc)->relocs != toc_relocs)
8773 if (local_syms != NULL
8774 && symtab_hdr->contents != (unsigned char *) local_syms)
8776 if (!info->keep_memory)
8779 symtab_hdr->contents = (unsigned char *) local_syms;
8787 /* Return true iff input section I references the TOC using
8788 instructions limited to +/-32k offsets. */
8791 ppc64_elf_has_small_toc_reloc (asection *i)
8793 return (is_ppc64_elf (i->owner)
8794 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8797 /* Allocate space for one GOT entry. */
8800 allocate_got (struct elf_link_hash_entry *h,
8801 struct bfd_link_info *info,
8802 struct got_entry *gent)
8804 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8806 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8807 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8809 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8810 ? 2 : 1) * sizeof (Elf64_External_Rela);
8811 asection *got = ppc64_elf_tdata (gent->owner)->got;
8813 gent->got.offset = got->size;
8814 got->size += entsize;
8816 dyn = htab->elf.dynamic_sections_created;
8818 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8819 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8820 || h->root.type != bfd_link_hash_undefweak))
8822 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8823 relgot->size += rentsize;
8825 else if (h->type == STT_GNU_IFUNC)
8827 asection *relgot = htab->reliplt;
8828 relgot->size += rentsize;
8829 htab->got_reli_size += rentsize;
8833 /* This function merges got entries in the same toc group. */
8836 merge_got_entries (struct got_entry **pent)
8838 struct got_entry *ent, *ent2;
8840 for (ent = *pent; ent != NULL; ent = ent->next)
8841 if (!ent->is_indirect)
8842 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8843 if (!ent2->is_indirect
8844 && ent2->addend == ent->addend
8845 && ent2->tls_type == ent->tls_type
8846 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8848 ent2->is_indirect = TRUE;
8849 ent2->got.ent = ent;
8853 /* Allocate space in .plt, .got and associated reloc sections for
8857 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8859 struct bfd_link_info *info;
8860 struct ppc_link_hash_table *htab;
8862 struct ppc_link_hash_entry *eh;
8863 struct elf_dyn_relocs *p;
8864 struct got_entry **pgent, *gent;
8866 if (h->root.type == bfd_link_hash_indirect)
8869 info = (struct bfd_link_info *) inf;
8870 htab = ppc_hash_table (info);
8874 if ((htab->elf.dynamic_sections_created
8876 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8877 || h->type == STT_GNU_IFUNC)
8879 struct plt_entry *pent;
8880 bfd_boolean doneone = FALSE;
8881 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8882 if (pent->plt.refcount > 0)
8884 if (!htab->elf.dynamic_sections_created
8885 || h->dynindx == -1)
8888 pent->plt.offset = s->size;
8889 s->size += PLT_ENTRY_SIZE;
8894 /* If this is the first .plt entry, make room for the special
8898 s->size += PLT_INITIAL_ENTRY_SIZE;
8900 pent->plt.offset = s->size;
8902 /* Make room for this entry. */
8903 s->size += PLT_ENTRY_SIZE;
8905 /* Make room for the .glink code. */
8908 s->size += GLINK_CALL_STUB_SIZE;
8909 /* We need bigger stubs past index 32767. */
8910 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8914 /* We also need to make an entry in the .rela.plt section. */
8917 s->size += sizeof (Elf64_External_Rela);
8921 pent->plt.offset = (bfd_vma) -1;
8924 h->plt.plist = NULL;
8930 h->plt.plist = NULL;
8934 eh = (struct ppc_link_hash_entry *) h;
8935 /* Run through the TLS GD got entries first if we're changing them
8937 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8938 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8939 if (gent->got.refcount > 0
8940 && (gent->tls_type & TLS_GD) != 0)
8942 /* This was a GD entry that has been converted to TPREL. If
8943 there happens to be a TPREL entry we can use that one. */
8944 struct got_entry *ent;
8945 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8946 if (ent->got.refcount > 0
8947 && (ent->tls_type & TLS_TPREL) != 0
8948 && ent->addend == gent->addend
8949 && ent->owner == gent->owner)
8951 gent->got.refcount = 0;
8955 /* If not, then we'll be using our own TPREL entry. */
8956 if (gent->got.refcount != 0)
8957 gent->tls_type = TLS_TLS | TLS_TPREL;
8960 /* Remove any list entry that won't generate a word in the GOT before
8961 we call merge_got_entries. Otherwise we risk merging to empty
8963 pgent = &h->got.glist;
8964 while ((gent = *pgent) != NULL)
8965 if (gent->got.refcount > 0)
8967 if ((gent->tls_type & TLS_LD) != 0
8970 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8971 *pgent = gent->next;
8974 pgent = &gent->next;
8977 *pgent = gent->next;
8979 if (!htab->do_multi_toc)
8980 merge_got_entries (&h->got.glist);
8982 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8983 if (!gent->is_indirect)
8985 /* Make sure this symbol is output as a dynamic symbol.
8986 Undefined weak syms won't yet be marked as dynamic,
8987 nor will all TLS symbols. */
8988 if (h->dynindx == -1
8990 && h->type != STT_GNU_IFUNC
8991 && htab->elf.dynamic_sections_created)
8993 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8997 if (!is_ppc64_elf (gent->owner))
9000 allocate_got (h, info, gent);
9003 if (eh->dyn_relocs == NULL
9004 || (!htab->elf.dynamic_sections_created
9005 && h->type != STT_GNU_IFUNC))
9008 /* In the shared -Bsymbolic case, discard space allocated for
9009 dynamic pc-relative relocs against symbols which turn out to be
9010 defined in regular objects. For the normal shared case, discard
9011 space for relocs that have become local due to symbol visibility
9016 /* Relocs that use pc_count are those that appear on a call insn,
9017 or certain REL relocs (see must_be_dyn_reloc) that can be
9018 generated via assembly. We want calls to protected symbols to
9019 resolve directly to the function rather than going via the plt.
9020 If people want function pointer comparisons to work as expected
9021 then they should avoid writing weird assembly. */
9022 if (SYMBOL_CALLS_LOCAL (info, h))
9024 struct elf_dyn_relocs **pp;
9026 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9028 p->count -= p->pc_count;
9037 /* Also discard relocs on undefined weak syms with non-default
9039 if (eh->dyn_relocs != NULL
9040 && h->root.type == bfd_link_hash_undefweak)
9042 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9043 eh->dyn_relocs = NULL;
9045 /* Make sure this symbol is output as a dynamic symbol.
9046 Undefined weak syms won't yet be marked as dynamic. */
9047 else if (h->dynindx == -1
9048 && !h->forced_local)
9050 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9055 else if (h->type == STT_GNU_IFUNC)
9057 if (!h->non_got_ref)
9058 eh->dyn_relocs = NULL;
9060 else if (ELIMINATE_COPY_RELOCS)
9062 /* For the non-shared case, discard space for relocs against
9063 symbols which turn out to need copy relocs or are not
9069 /* Make sure this symbol is output as a dynamic symbol.
9070 Undefined weak syms won't yet be marked as dynamic. */
9071 if (h->dynindx == -1
9072 && !h->forced_local)
9074 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9078 /* If that succeeded, we know we'll be keeping all the
9080 if (h->dynindx != -1)
9084 eh->dyn_relocs = NULL;
9089 /* Finally, allocate space. */
9090 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9092 asection *sreloc = elf_section_data (p->sec)->sreloc;
9093 if (!htab->elf.dynamic_sections_created)
9094 sreloc = htab->reliplt;
9095 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9101 /* Find any dynamic relocs that apply to read-only sections. */
9104 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9106 struct ppc_link_hash_entry *eh;
9107 struct elf_dyn_relocs *p;
9109 eh = (struct ppc_link_hash_entry *) h;
9110 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9112 asection *s = p->sec->output_section;
9114 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9116 struct bfd_link_info *info = inf;
9118 info->flags |= DF_TEXTREL;
9120 /* Not an error, just cut short the traversal. */
9127 /* Set the sizes of the dynamic sections. */
9130 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9131 struct bfd_link_info *info)
9133 struct ppc_link_hash_table *htab;
9138 struct got_entry *first_tlsld;
9140 htab = ppc_hash_table (info);
9144 dynobj = htab->elf.dynobj;
9148 if (htab->elf.dynamic_sections_created)
9150 /* Set the contents of the .interp section to the interpreter. */
9151 if (info->executable)
9153 s = bfd_get_linker_section (dynobj, ".interp");
9156 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9157 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9161 /* Set up .got offsets for local syms, and space for local dynamic
9163 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9165 struct got_entry **lgot_ents;
9166 struct got_entry **end_lgot_ents;
9167 struct plt_entry **local_plt;
9168 struct plt_entry **end_local_plt;
9169 unsigned char *lgot_masks;
9170 bfd_size_type locsymcount;
9171 Elf_Internal_Shdr *symtab_hdr;
9174 if (!is_ppc64_elf (ibfd))
9177 for (s = ibfd->sections; s != NULL; s = s->next)
9179 struct elf_dyn_relocs *p;
9181 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9183 if (!bfd_is_abs_section (p->sec)
9184 && bfd_is_abs_section (p->sec->output_section))
9186 /* Input section has been discarded, either because
9187 it is a copy of a linkonce section or due to
9188 linker script /DISCARD/, so we'll be discarding
9191 else if (p->count != 0)
9193 srel = elf_section_data (p->sec)->sreloc;
9194 if (!htab->elf.dynamic_sections_created)
9195 srel = htab->reliplt;
9196 srel->size += p->count * sizeof (Elf64_External_Rela);
9197 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9198 info->flags |= DF_TEXTREL;
9203 lgot_ents = elf_local_got_ents (ibfd);
9207 symtab_hdr = &elf_symtab_hdr (ibfd);
9208 locsymcount = symtab_hdr->sh_info;
9209 end_lgot_ents = lgot_ents + locsymcount;
9210 local_plt = (struct plt_entry **) end_lgot_ents;
9211 end_local_plt = local_plt + locsymcount;
9212 lgot_masks = (unsigned char *) end_local_plt;
9213 s = ppc64_elf_tdata (ibfd)->got;
9214 srel = ppc64_elf_tdata (ibfd)->relgot;
9215 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9217 struct got_entry **pent, *ent;
9220 while ((ent = *pent) != NULL)
9221 if (ent->got.refcount > 0)
9223 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9225 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9230 unsigned int num = 1;
9231 ent->got.offset = s->size;
9232 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9236 srel->size += num * sizeof (Elf64_External_Rela);
9237 else if ((*lgot_masks & PLT_IFUNC) != 0)
9240 += num * sizeof (Elf64_External_Rela);
9242 += num * sizeof (Elf64_External_Rela);
9251 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9252 for (; local_plt < end_local_plt; ++local_plt)
9254 struct plt_entry *ent;
9256 for (ent = *local_plt; ent != NULL; ent = ent->next)
9257 if (ent->plt.refcount > 0)
9260 ent->plt.offset = s->size;
9261 s->size += PLT_ENTRY_SIZE;
9263 htab->reliplt->size += sizeof (Elf64_External_Rela);
9266 ent->plt.offset = (bfd_vma) -1;
9270 /* Allocate global sym .plt and .got entries, and space for global
9271 sym dynamic relocs. */
9272 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9275 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9277 struct got_entry *ent;
9279 if (!is_ppc64_elf (ibfd))
9282 ent = ppc64_tlsld_got (ibfd);
9283 if (ent->got.refcount > 0)
9285 if (!htab->do_multi_toc && first_tlsld != NULL)
9287 ent->is_indirect = TRUE;
9288 ent->got.ent = first_tlsld;
9292 if (first_tlsld == NULL)
9294 s = ppc64_elf_tdata (ibfd)->got;
9295 ent->got.offset = s->size;
9300 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9301 srel->size += sizeof (Elf64_External_Rela);
9306 ent->got.offset = (bfd_vma) -1;
9309 /* We now have determined the sizes of the various dynamic sections.
9310 Allocate memory for them. */
9312 for (s = dynobj->sections; s != NULL; s = s->next)
9314 if ((s->flags & SEC_LINKER_CREATED) == 0)
9317 if (s == htab->brlt || s == htab->relbrlt)
9318 /* These haven't been allocated yet; don't strip. */
9320 else if (s == htab->got
9324 || s == htab->dynbss)
9326 /* Strip this section if we don't need it; see the
9329 else if (s == htab->glink_eh_frame)
9331 if (!bfd_is_abs_section (s->output_section))
9332 /* Not sized yet. */
9335 else if (CONST_STRNEQ (s->name, ".rela"))
9339 if (s != htab->relplt)
9342 /* We use the reloc_count field as a counter if we need
9343 to copy relocs into the output file. */
9349 /* It's not one of our sections, so don't allocate space. */
9355 /* If we don't need this section, strip it from the
9356 output file. This is mostly to handle .rela.bss and
9357 .rela.plt. We must create both sections in
9358 create_dynamic_sections, because they must be created
9359 before the linker maps input sections to output
9360 sections. The linker does that before
9361 adjust_dynamic_symbol is called, and it is that
9362 function which decides whether anything needs to go
9363 into these sections. */
9364 s->flags |= SEC_EXCLUDE;
9368 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9371 /* Allocate memory for the section contents. We use bfd_zalloc
9372 here in case unused entries are not reclaimed before the
9373 section's contents are written out. This should not happen,
9374 but this way if it does we get a R_PPC64_NONE reloc in .rela
9375 sections instead of garbage.
9376 We also rely on the section contents being zero when writing
9378 s->contents = bfd_zalloc (dynobj, s->size);
9379 if (s->contents == NULL)
9383 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9385 if (!is_ppc64_elf (ibfd))
9388 s = ppc64_elf_tdata (ibfd)->got;
9389 if (s != NULL && s != htab->got)
9392 s->flags |= SEC_EXCLUDE;
9395 s->contents = bfd_zalloc (ibfd, s->size);
9396 if (s->contents == NULL)
9400 s = ppc64_elf_tdata (ibfd)->relgot;
9404 s->flags |= SEC_EXCLUDE;
9407 s->contents = bfd_zalloc (ibfd, s->size);
9408 if (s->contents == NULL)
9416 if (htab->elf.dynamic_sections_created)
9418 /* Add some entries to the .dynamic section. We fill in the
9419 values later, in ppc64_elf_finish_dynamic_sections, but we
9420 must add the entries now so that we get the correct size for
9421 the .dynamic section. The DT_DEBUG entry is filled in by the
9422 dynamic linker and used by the debugger. */
9423 #define add_dynamic_entry(TAG, VAL) \
9424 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9426 if (info->executable)
9428 if (!add_dynamic_entry (DT_DEBUG, 0))
9432 if (htab->plt != NULL && htab->plt->size != 0)
9434 if (!add_dynamic_entry (DT_PLTGOT, 0)
9435 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9436 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9437 || !add_dynamic_entry (DT_JMPREL, 0)
9438 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9444 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9445 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9449 if (!htab->no_tls_get_addr_opt
9450 && htab->tls_get_addr_fd != NULL
9451 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9452 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9457 if (!add_dynamic_entry (DT_RELA, 0)
9458 || !add_dynamic_entry (DT_RELASZ, 0)
9459 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9462 /* If any dynamic relocs apply to a read-only section,
9463 then we need a DT_TEXTREL entry. */
9464 if ((info->flags & DF_TEXTREL) == 0)
9465 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9467 if ((info->flags & DF_TEXTREL) != 0)
9469 if (!add_dynamic_entry (DT_TEXTREL, 0))
9474 #undef add_dynamic_entry
9479 /* Determine the type of stub needed, if any, for a call. */
9481 static inline enum ppc_stub_type
9482 ppc_type_of_stub (asection *input_sec,
9483 const Elf_Internal_Rela *rel,
9484 struct ppc_link_hash_entry **hash,
9485 struct plt_entry **plt_ent,
9486 bfd_vma destination)
9488 struct ppc_link_hash_entry *h = *hash;
9490 bfd_vma branch_offset;
9491 bfd_vma max_branch_offset;
9492 enum elf_ppc64_reloc_type r_type;
9496 struct plt_entry *ent;
9497 struct ppc_link_hash_entry *fdh = h;
9499 && h->oh->is_func_descriptor)
9501 fdh = ppc_follow_link (h->oh);
9505 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9506 if (ent->addend == rel->r_addend
9507 && ent->plt.offset != (bfd_vma) -1)
9510 return ppc_stub_plt_call;
9513 /* Here, we know we don't have a plt entry. If we don't have a
9514 either a defined function descriptor or a defined entry symbol
9515 in a regular object file, then it is pointless trying to make
9516 any other type of stub. */
9517 if (!is_static_defined (&fdh->elf)
9518 && !is_static_defined (&h->elf))
9519 return ppc_stub_none;
9521 else if (elf_local_got_ents (input_sec->owner) != NULL)
9523 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9524 struct plt_entry **local_plt = (struct plt_entry **)
9525 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9526 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9528 if (local_plt[r_symndx] != NULL)
9530 struct plt_entry *ent;
9532 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9533 if (ent->addend == rel->r_addend
9534 && ent->plt.offset != (bfd_vma) -1)
9537 return ppc_stub_plt_call;
9542 /* Determine where the call point is. */
9543 location = (input_sec->output_offset
9544 + input_sec->output_section->vma
9547 branch_offset = destination - location;
9548 r_type = ELF64_R_TYPE (rel->r_info);
9550 /* Determine if a long branch stub is needed. */
9551 max_branch_offset = 1 << 25;
9552 if (r_type != R_PPC64_REL24)
9553 max_branch_offset = 1 << 15;
9555 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9556 /* We need a stub. Figure out whether a long_branch or plt_branch
9558 return ppc_stub_long_branch;
9560 return ppc_stub_none;
9563 /* With power7 weakly ordered memory model, it is possible for ld.so
9564 to update a plt entry in one thread and have another thread see a
9565 stale zero toc entry. To avoid this we need some sort of acquire
9566 barrier in the call stub. One solution is to make the load of the
9567 toc word seem to appear to depend on the load of the function entry
9568 word. Another solution is to test for r2 being zero, and branch to
9569 the appropriate glink entry if so.
9571 . fake dep barrier compare
9572 . ld 11,xxx(2) ld 11,xxx(2)
9574 . xor 11,11,11 ld 2,xxx+8(2)
9575 . add 2,2,11 cmpldi 2,0
9576 . ld 2,xxx+8(2) bnectr+
9577 . bctr b <glink_entry>
9579 The solution involving the compare turns out to be faster, so
9580 that's what we use unless the branch won't reach. */
9582 #define ALWAYS_USE_FAKE_DEP 0
9583 #define ALWAYS_EMIT_R2SAVE 0
9585 #define PPC_LO(v) ((v) & 0xffff)
9586 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9587 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9589 static inline unsigned int
9590 plt_stub_size (struct ppc_link_hash_table *htab,
9591 struct ppc_stub_hash_entry *stub_entry,
9594 unsigned size = PLT_CALL_STUB_SIZE;
9596 if (!(ALWAYS_EMIT_R2SAVE
9597 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9599 if (!htab->plt_static_chain)
9601 if (htab->plt_thread_safe)
9603 if (PPC_HA (off) == 0)
9605 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9607 if (stub_entry->h != NULL
9608 && (stub_entry->h == htab->tls_get_addr_fd
9609 || stub_entry->h == htab->tls_get_addr)
9610 && !htab->no_tls_get_addr_opt)
9615 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9616 then return the padding needed to do so. */
9617 static inline unsigned int
9618 plt_stub_pad (struct ppc_link_hash_table *htab,
9619 struct ppc_stub_hash_entry *stub_entry,
9622 int stub_align = 1 << htab->plt_stub_align;
9623 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9624 bfd_vma stub_off = stub_entry->stub_sec->size;
9626 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9627 > (stub_size & -stub_align))
9628 return stub_align - (stub_off & (stub_align - 1));
9632 /* Build a .plt call stub. */
9634 static inline bfd_byte *
9635 build_plt_stub (struct ppc_link_hash_table *htab,
9636 struct ppc_stub_hash_entry *stub_entry,
9637 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9639 bfd *obfd = htab->stub_bfd;
9640 bfd_boolean plt_static_chain = htab->plt_static_chain;
9641 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9642 bfd_boolean use_fake_dep = plt_thread_safe;
9643 bfd_vma cmp_branch_off = 0;
9645 if (!ALWAYS_USE_FAKE_DEP
9647 && !(stub_entry->h != NULL
9648 && (stub_entry->h == htab->tls_get_addr_fd
9649 || stub_entry->h == htab->tls_get_addr)
9650 && !htab->no_tls_get_addr_opt))
9652 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9653 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9654 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9657 if (pltindex > 32768)
9658 glinkoff += (pltindex - 32768) * 4;
9660 + htab->glink->output_offset
9661 + htab->glink->output_section->vma);
9662 from = (p - stub_entry->stub_sec->contents
9663 + 4 * (ALWAYS_EMIT_R2SAVE
9664 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9665 + 4 * (PPC_HA (offset) != 0)
9666 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9668 + 4 * (plt_static_chain != 0)
9670 + stub_entry->stub_sec->output_offset
9671 + stub_entry->stub_sec->output_section->vma);
9672 cmp_branch_off = to - from;
9673 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9676 if (PPC_HA (offset) != 0)
9680 if (ALWAYS_EMIT_R2SAVE
9681 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9683 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9684 r[1].r_offset = r[0].r_offset + 4;
9685 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9686 r[1].r_addend = r[0].r_addend;
9687 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9689 r[2].r_offset = r[1].r_offset + 4;
9690 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9691 r[2].r_addend = r[0].r_addend;
9695 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9696 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9697 r[2].r_addend = r[0].r_addend + 8;
9698 if (plt_static_chain)
9700 r[3].r_offset = r[2].r_offset + 4;
9701 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9702 r[3].r_addend = r[0].r_addend + 16;
9706 if (ALWAYS_EMIT_R2SAVE
9707 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9708 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9709 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9710 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9711 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9713 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9716 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9719 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9720 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9722 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9723 if (plt_static_chain)
9724 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9730 if (ALWAYS_EMIT_R2SAVE
9731 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9733 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9734 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9736 r[1].r_offset = r[0].r_offset + 4;
9737 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9738 r[1].r_addend = r[0].r_addend;
9742 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9743 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9744 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9745 if (plt_static_chain)
9747 r[2].r_offset = r[1].r_offset + 4;
9748 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9749 r[2].r_addend = r[0].r_addend + 8;
9753 if (ALWAYS_EMIT_R2SAVE
9754 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9755 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9756 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9757 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9759 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9762 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9765 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9766 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9768 if (plt_static_chain)
9769 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9770 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9772 if (plt_thread_safe && !use_fake_dep)
9774 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9775 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9776 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
9779 bfd_put_32 (obfd, BCTR, p), p += 4;
9783 /* Build a special .plt call stub for __tls_get_addr. */
9785 #define LD_R11_0R3 0xe9630000
9786 #define LD_R12_0R3 0xe9830000
9787 #define MR_R0_R3 0x7c601b78
9788 #define CMPDI_R11_0 0x2c2b0000
9789 #define ADD_R3_R12_R13 0x7c6c6a14
9790 #define BEQLR 0x4d820020
9791 #define MR_R3_R0 0x7c030378
9792 #define MFLR_R11 0x7d6802a6
9793 #define STD_R11_0R1 0xf9610000
9794 #define BCTRL 0x4e800421
9795 #define LD_R11_0R1 0xe9610000
9796 #define LD_R2_0R1 0xe8410000
9797 #define MTLR_R11 0x7d6803a6
9799 static inline bfd_byte *
9800 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
9801 struct ppc_stub_hash_entry *stub_entry,
9802 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9804 bfd *obfd = htab->stub_bfd;
9806 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9807 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9808 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9809 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9810 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9811 bfd_put_32 (obfd, BEQLR, p), p += 4;
9812 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9813 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9814 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9817 r[0].r_offset += 9 * 4;
9818 p = build_plt_stub (htab, stub_entry, p, offset, r);
9819 bfd_put_32 (obfd, BCTRL, p - 4);
9821 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9822 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9823 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9824 bfd_put_32 (obfd, BLR, p), p += 4;
9829 static Elf_Internal_Rela *
9830 get_relocs (asection *sec, int count)
9832 Elf_Internal_Rela *relocs;
9833 struct bfd_elf_section_data *elfsec_data;
9835 elfsec_data = elf_section_data (sec);
9836 relocs = elfsec_data->relocs;
9839 bfd_size_type relsize;
9840 relsize = sec->reloc_count * sizeof (*relocs);
9841 relocs = bfd_alloc (sec->owner, relsize);
9844 elfsec_data->relocs = relocs;
9845 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9846 sizeof (Elf_Internal_Shdr));
9847 if (elfsec_data->rela.hdr == NULL)
9849 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9850 * sizeof (Elf64_External_Rela));
9851 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9852 sec->reloc_count = 0;
9854 relocs += sec->reloc_count;
9855 sec->reloc_count += count;
9860 get_r2off (struct bfd_link_info *info,
9861 struct ppc_stub_hash_entry *stub_entry)
9863 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9864 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9868 /* Support linking -R objects. Get the toc pointer from the
9871 asection *opd = stub_entry->h->elf.root.u.def.section;
9872 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9874 if (strcmp (opd->name, ".opd") != 0
9875 || opd->reloc_count != 0)
9877 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
9878 stub_entry->h->elf.root.root.string);
9879 bfd_set_error (bfd_error_bad_value);
9882 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9884 r2off = bfd_get_64 (opd->owner, buf);
9885 r2off -= elf_gp (info->output_bfd);
9887 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9892 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9894 struct ppc_stub_hash_entry *stub_entry;
9895 struct ppc_branch_hash_entry *br_entry;
9896 struct bfd_link_info *info;
9897 struct ppc_link_hash_table *htab;
9902 Elf_Internal_Rela *r;
9905 /* Massage our args to the form they really have. */
9906 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9909 htab = ppc_hash_table (info);
9913 /* Make a note of the offset within the stubs for this entry. */
9914 stub_entry->stub_offset = stub_entry->stub_sec->size;
9915 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9917 htab->stub_count[stub_entry->stub_type - 1] += 1;
9918 switch (stub_entry->stub_type)
9920 case ppc_stub_long_branch:
9921 case ppc_stub_long_branch_r2off:
9922 /* Branches are relative. This is where we are going to. */
9923 off = dest = (stub_entry->target_value
9924 + stub_entry->target_section->output_offset
9925 + stub_entry->target_section->output_section->vma);
9927 /* And this is where we are coming from. */
9928 off -= (stub_entry->stub_offset
9929 + stub_entry->stub_sec->output_offset
9930 + stub_entry->stub_sec->output_section->vma);
9933 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9935 bfd_vma r2off = get_r2off (info, stub_entry);
9939 htab->stub_error = TRUE;
9942 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9945 if (PPC_HA (r2off) != 0)
9948 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9951 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9955 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9957 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9959 info->callbacks->einfo
9960 (_("%P: long branch stub `%s' offset overflow\n"),
9961 stub_entry->root.string);
9962 htab->stub_error = TRUE;
9966 if (info->emitrelocations)
9968 r = get_relocs (stub_entry->stub_sec, 1);
9971 r->r_offset = loc - stub_entry->stub_sec->contents;
9972 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9974 if (stub_entry->h != NULL)
9976 struct elf_link_hash_entry **hashes;
9977 unsigned long symndx;
9978 struct ppc_link_hash_entry *h;
9980 hashes = elf_sym_hashes (htab->stub_bfd);
9983 bfd_size_type hsize;
9985 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9986 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9989 elf_sym_hashes (htab->stub_bfd) = hashes;
9990 htab->stub_globals = 1;
9992 symndx = htab->stub_globals++;
9994 hashes[symndx] = &h->elf;
9995 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9996 if (h->oh != NULL && h->oh->is_func)
9997 h = ppc_follow_link (h->oh);
9998 if (h->elf.root.u.def.section != stub_entry->target_section)
9999 /* H is an opd symbol. The addend must be zero. */
10003 off = (h->elf.root.u.def.value
10004 + h->elf.root.u.def.section->output_offset
10005 + h->elf.root.u.def.section->output_section->vma);
10006 r->r_addend -= off;
10012 case ppc_stub_plt_branch:
10013 case ppc_stub_plt_branch_r2off:
10014 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10015 stub_entry->root.string + 9,
10017 if (br_entry == NULL)
10019 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10020 stub_entry->root.string);
10021 htab->stub_error = TRUE;
10025 dest = (stub_entry->target_value
10026 + stub_entry->target_section->output_offset
10027 + stub_entry->target_section->output_section->vma);
10029 bfd_put_64 (htab->brlt->owner, dest,
10030 htab->brlt->contents + br_entry->offset);
10032 if (br_entry->iter == htab->stub_iteration)
10034 br_entry->iter = 0;
10036 if (htab->relbrlt != NULL)
10038 /* Create a reloc for the branch lookup table entry. */
10039 Elf_Internal_Rela rela;
10042 rela.r_offset = (br_entry->offset
10043 + htab->brlt->output_offset
10044 + htab->brlt->output_section->vma);
10045 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10046 rela.r_addend = dest;
10048 rl = htab->relbrlt->contents;
10049 rl += (htab->relbrlt->reloc_count++
10050 * sizeof (Elf64_External_Rela));
10051 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10053 else if (info->emitrelocations)
10055 r = get_relocs (htab->brlt, 1);
10058 /* brlt, being SEC_LINKER_CREATED does not go through the
10059 normal reloc processing. Symbols and offsets are not
10060 translated from input file to output file form, so
10061 set up the offset per the output file. */
10062 r->r_offset = (br_entry->offset
10063 + htab->brlt->output_offset
10064 + htab->brlt->output_section->vma);
10065 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10066 r->r_addend = dest;
10070 dest = (br_entry->offset
10071 + htab->brlt->output_offset
10072 + htab->brlt->output_section->vma);
10075 - elf_gp (htab->brlt->output_section->owner)
10076 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10078 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10080 info->callbacks->einfo
10081 (_("%P: linkage table error against `%T'\n"),
10082 stub_entry->root.string);
10083 bfd_set_error (bfd_error_bad_value);
10084 htab->stub_error = TRUE;
10088 if (info->emitrelocations)
10090 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10093 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10094 if (bfd_big_endian (info->output_bfd))
10095 r[0].r_offset += 2;
10096 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10097 r[0].r_offset += 4;
10098 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10099 r[0].r_addend = dest;
10100 if (PPC_HA (off) != 0)
10102 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10103 r[1].r_offset = r[0].r_offset + 4;
10104 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10105 r[1].r_addend = r[0].r_addend;
10109 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10111 if (PPC_HA (off) != 0)
10114 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10116 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10121 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10126 bfd_vma r2off = get_r2off (info, stub_entry);
10130 htab->stub_error = TRUE;
10134 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10137 if (PPC_HA (off) != 0)
10140 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10142 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10147 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10151 if (PPC_HA (r2off) != 0)
10154 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10157 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10160 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10162 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10165 case ppc_stub_plt_call:
10166 case ppc_stub_plt_call_r2save:
10167 if (stub_entry->h != NULL
10168 && stub_entry->h->is_func_descriptor
10169 && stub_entry->h->oh != NULL)
10171 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10173 /* If the old-ABI "dot-symbol" is undefined make it weak so
10174 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10175 FIXME: We used to define the symbol on one of the call
10176 stubs instead, which is why we test symbol section id
10177 against htab->top_id in various places. Likely all
10178 these checks could now disappear. */
10179 if (fh->elf.root.type == bfd_link_hash_undefined)
10180 fh->elf.root.type = bfd_link_hash_undefweak;
10181 /* Stop undo_symbol_twiddle changing it back to undefined. */
10182 fh->was_undefined = 0;
10185 /* Now build the stub. */
10186 dest = stub_entry->plt_ent->plt.offset & ~1;
10187 if (dest >= (bfd_vma) -2)
10191 if (!htab->elf.dynamic_sections_created
10192 || stub_entry->h == NULL
10193 || stub_entry->h->elf.dynindx == -1)
10196 dest += plt->output_offset + plt->output_section->vma;
10198 if (stub_entry->h == NULL
10199 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10201 Elf_Internal_Rela rela;
10204 rela.r_offset = dest;
10205 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10206 rela.r_addend = (stub_entry->target_value
10207 + stub_entry->target_section->output_offset
10208 + stub_entry->target_section->output_section->vma);
10210 rl = (htab->reliplt->contents
10211 + (htab->reliplt->reloc_count++
10212 * sizeof (Elf64_External_Rela)));
10213 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10214 stub_entry->plt_ent->plt.offset |= 1;
10218 - elf_gp (plt->output_section->owner)
10219 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10221 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10223 info->callbacks->einfo
10224 (_("%P: linkage table error against `%T'\n"),
10225 stub_entry->h != NULL
10226 ? stub_entry->h->elf.root.root.string
10228 bfd_set_error (bfd_error_bad_value);
10229 htab->stub_error = TRUE;
10233 if (htab->plt_stub_align != 0)
10235 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10237 stub_entry->stub_sec->size += pad;
10238 stub_entry->stub_offset = stub_entry->stub_sec->size;
10243 if (info->emitrelocations)
10245 r = get_relocs (stub_entry->stub_sec,
10247 + (PPC_HA (off) != 0)
10248 + (htab->plt_static_chain
10249 && PPC_HA (off + 16) == PPC_HA (off))));
10252 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10253 if (bfd_big_endian (info->output_bfd))
10254 r[0].r_offset += 2;
10255 r[0].r_addend = dest;
10257 if (stub_entry->h != NULL
10258 && (stub_entry->h == htab->tls_get_addr_fd
10259 || stub_entry->h == htab->tls_get_addr)
10260 && !htab->no_tls_get_addr_opt)
10261 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10263 p = build_plt_stub (htab, stub_entry, loc, off, r);
10272 stub_entry->stub_sec->size += size;
10274 if (htab->emit_stub_syms)
10276 struct elf_link_hash_entry *h;
10279 const char *const stub_str[] = { "long_branch",
10280 "long_branch_r2off",
10282 "plt_branch_r2off",
10286 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10287 len2 = strlen (stub_entry->root.string);
10288 name = bfd_malloc (len1 + len2 + 2);
10291 memcpy (name, stub_entry->root.string, 9);
10292 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10293 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10294 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10297 if (h->root.type == bfd_link_hash_new)
10299 h->root.type = bfd_link_hash_defined;
10300 h->root.u.def.section = stub_entry->stub_sec;
10301 h->root.u.def.value = stub_entry->stub_offset;
10302 h->ref_regular = 1;
10303 h->def_regular = 1;
10304 h->ref_regular_nonweak = 1;
10305 h->forced_local = 1;
10313 /* As above, but don't actually build the stub. Just bump offset so
10314 we know stub section sizes, and select plt_branch stubs where
10315 long_branch stubs won't do. */
10318 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10320 struct ppc_stub_hash_entry *stub_entry;
10321 struct bfd_link_info *info;
10322 struct ppc_link_hash_table *htab;
10326 /* Massage our args to the form they really have. */
10327 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10330 htab = ppc_hash_table (info);
10334 if (stub_entry->stub_type == ppc_stub_plt_call
10335 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10338 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10339 if (off >= (bfd_vma) -2)
10342 if (!htab->elf.dynamic_sections_created
10343 || stub_entry->h == NULL
10344 || stub_entry->h->elf.dynindx == -1)
10346 off += (plt->output_offset
10347 + plt->output_section->vma
10348 - elf_gp (plt->output_section->owner)
10349 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10351 size = plt_stub_size (htab, stub_entry, off);
10352 if (htab->plt_stub_align)
10353 size += plt_stub_pad (htab, stub_entry, off);
10354 if (info->emitrelocations)
10356 stub_entry->stub_sec->reloc_count
10358 + (PPC_HA (off) != 0)
10359 + (htab->plt_static_chain
10360 && PPC_HA (off + 16) == PPC_HA (off)));
10361 stub_entry->stub_sec->flags |= SEC_RELOC;
10366 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10370 off = (stub_entry->target_value
10371 + stub_entry->target_section->output_offset
10372 + stub_entry->target_section->output_section->vma);
10373 off -= (stub_entry->stub_sec->size
10374 + stub_entry->stub_sec->output_offset
10375 + stub_entry->stub_sec->output_section->vma);
10377 /* Reset the stub type from the plt variant in case we now
10378 can reach with a shorter stub. */
10379 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10380 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10383 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10385 r2off = get_r2off (info, stub_entry);
10388 htab->stub_error = TRUE;
10392 if (PPC_HA (r2off) != 0)
10397 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10398 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10400 struct ppc_branch_hash_entry *br_entry;
10402 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10403 stub_entry->root.string + 9,
10405 if (br_entry == NULL)
10407 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10408 stub_entry->root.string);
10409 htab->stub_error = TRUE;
10413 if (br_entry->iter != htab->stub_iteration)
10415 br_entry->iter = htab->stub_iteration;
10416 br_entry->offset = htab->brlt->size;
10417 htab->brlt->size += 8;
10419 if (htab->relbrlt != NULL)
10420 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10421 else if (info->emitrelocations)
10423 htab->brlt->reloc_count += 1;
10424 htab->brlt->flags |= SEC_RELOC;
10428 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10429 off = (br_entry->offset
10430 + htab->brlt->output_offset
10431 + htab->brlt->output_section->vma
10432 - elf_gp (htab->brlt->output_section->owner)
10433 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10435 if (info->emitrelocations)
10437 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10438 stub_entry->stub_sec->flags |= SEC_RELOC;
10441 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10444 if (PPC_HA (off) != 0)
10450 if (PPC_HA (off) != 0)
10453 if (PPC_HA (r2off) != 0)
10457 else if (info->emitrelocations)
10459 stub_entry->stub_sec->reloc_count += 1;
10460 stub_entry->stub_sec->flags |= SEC_RELOC;
10464 stub_entry->stub_sec->size += size;
10468 /* Set up various things so that we can make a list of input sections
10469 for each output section included in the link. Returns -1 on error,
10470 0 when no stubs will be needed, and 1 on success. */
10473 ppc64_elf_setup_section_lists
10474 (struct bfd_link_info *info,
10475 asection *(*add_stub_section) (const char *, asection *),
10476 void (*layout_sections_again) (void))
10479 int top_id, top_index, id;
10481 asection **input_list;
10483 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10487 /* Stash our params away. */
10488 htab->add_stub_section = add_stub_section;
10489 htab->layout_sections_again = layout_sections_again;
10491 if (htab->brlt == NULL)
10494 /* Find the top input section id. */
10495 for (input_bfd = info->input_bfds, top_id = 3;
10497 input_bfd = input_bfd->link_next)
10499 for (section = input_bfd->sections;
10501 section = section->next)
10503 if (top_id < section->id)
10504 top_id = section->id;
10508 htab->top_id = top_id;
10509 amt = sizeof (struct map_stub) * (top_id + 1);
10510 htab->stub_group = bfd_zmalloc (amt);
10511 if (htab->stub_group == NULL)
10514 /* Set toc_off for com, und, abs and ind sections. */
10515 for (id = 0; id < 3; id++)
10516 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10518 /* We can't use output_bfd->section_count here to find the top output
10519 section index as some sections may have been removed, and
10520 strip_excluded_output_sections doesn't renumber the indices. */
10521 for (section = info->output_bfd->sections, top_index = 0;
10523 section = section->next)
10525 if (top_index < section->index)
10526 top_index = section->index;
10529 htab->top_index = top_index;
10530 amt = sizeof (asection *) * (top_index + 1);
10531 input_list = bfd_zmalloc (amt);
10532 htab->input_list = input_list;
10533 if (input_list == NULL)
10539 /* Set up for first pass at multitoc partitioning. */
10542 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10544 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10546 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10547 htab->toc_curr = elf_gp (info->output_bfd);
10548 htab->toc_bfd = NULL;
10549 htab->toc_first_sec = NULL;
10552 /* The linker repeatedly calls this function for each TOC input section
10553 and linker generated GOT section. Group input bfds such that the toc
10554 within a group is less than 64k in size. */
10557 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10559 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10560 bfd_vma addr, off, limit;
10565 if (!htab->second_toc_pass)
10567 /* Keep track of the first .toc or .got section for this input bfd. */
10568 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
10572 htab->toc_bfd = isec->owner;
10573 htab->toc_first_sec = isec;
10576 addr = isec->output_offset + isec->output_section->vma;
10577 off = addr - htab->toc_curr;
10578 limit = 0x80008000;
10579 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10581 if (off + isec->size > limit)
10583 addr = (htab->toc_first_sec->output_offset
10584 + htab->toc_first_sec->output_section->vma);
10585 htab->toc_curr = addr;
10588 /* toc_curr is the base address of this toc group. Set elf_gp
10589 for the input section to be the offset relative to the
10590 output toc base plus 0x8000. Making the input elf_gp an
10591 offset allows us to move the toc as a whole without
10592 recalculating input elf_gp. */
10593 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10594 off += TOC_BASE_OFF;
10596 /* Die if someone uses a linker script that doesn't keep input
10597 file .toc and .got together. */
10599 && elf_gp (isec->owner) != 0
10600 && elf_gp (isec->owner) != off)
10603 elf_gp (isec->owner) = off;
10607 /* During the second pass toc_first_sec points to the start of
10608 a toc group, and toc_curr is used to track the old elf_gp.
10609 We use toc_bfd to ensure we only look at each bfd once. */
10610 if (htab->toc_bfd == isec->owner)
10612 htab->toc_bfd = isec->owner;
10614 if (htab->toc_first_sec == NULL
10615 || htab->toc_curr != elf_gp (isec->owner))
10617 htab->toc_curr = elf_gp (isec->owner);
10618 htab->toc_first_sec = isec;
10620 addr = (htab->toc_first_sec->output_offset
10621 + htab->toc_first_sec->output_section->vma);
10622 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10623 elf_gp (isec->owner) = off;
10628 /* Called via elf_link_hash_traverse to merge GOT entries for global
10632 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10634 if (h->root.type == bfd_link_hash_indirect)
10637 merge_got_entries (&h->got.glist);
10642 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10646 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10648 struct got_entry *gent;
10650 if (h->root.type == bfd_link_hash_indirect)
10653 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10654 if (!gent->is_indirect)
10655 allocate_got (h, (struct bfd_link_info *) inf, gent);
10659 /* Called on the first multitoc pass after the last call to
10660 ppc64_elf_next_toc_section. This function removes duplicate GOT
10664 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10666 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10667 struct bfd *ibfd, *ibfd2;
10668 bfd_boolean done_something;
10670 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10672 if (!htab->do_multi_toc)
10675 /* Merge global sym got entries within a toc group. */
10676 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10678 /* And tlsld_got. */
10679 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10681 struct got_entry *ent, *ent2;
10683 if (!is_ppc64_elf (ibfd))
10686 ent = ppc64_tlsld_got (ibfd);
10687 if (!ent->is_indirect
10688 && ent->got.offset != (bfd_vma) -1)
10690 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10692 if (!is_ppc64_elf (ibfd2))
10695 ent2 = ppc64_tlsld_got (ibfd2);
10696 if (!ent2->is_indirect
10697 && ent2->got.offset != (bfd_vma) -1
10698 && elf_gp (ibfd2) == elf_gp (ibfd))
10700 ent2->is_indirect = TRUE;
10701 ent2->got.ent = ent;
10707 /* Zap sizes of got sections. */
10708 htab->reliplt->rawsize = htab->reliplt->size;
10709 htab->reliplt->size -= htab->got_reli_size;
10710 htab->got_reli_size = 0;
10712 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10714 asection *got, *relgot;
10716 if (!is_ppc64_elf (ibfd))
10719 got = ppc64_elf_tdata (ibfd)->got;
10722 got->rawsize = got->size;
10724 relgot = ppc64_elf_tdata (ibfd)->relgot;
10725 relgot->rawsize = relgot->size;
10730 /* Now reallocate the got, local syms first. We don't need to
10731 allocate section contents again since we never increase size. */
10732 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10734 struct got_entry **lgot_ents;
10735 struct got_entry **end_lgot_ents;
10736 struct plt_entry **local_plt;
10737 struct plt_entry **end_local_plt;
10738 unsigned char *lgot_masks;
10739 bfd_size_type locsymcount;
10740 Elf_Internal_Shdr *symtab_hdr;
10741 asection *s, *srel;
10743 if (!is_ppc64_elf (ibfd))
10746 lgot_ents = elf_local_got_ents (ibfd);
10750 symtab_hdr = &elf_symtab_hdr (ibfd);
10751 locsymcount = symtab_hdr->sh_info;
10752 end_lgot_ents = lgot_ents + locsymcount;
10753 local_plt = (struct plt_entry **) end_lgot_ents;
10754 end_local_plt = local_plt + locsymcount;
10755 lgot_masks = (unsigned char *) end_local_plt;
10756 s = ppc64_elf_tdata (ibfd)->got;
10757 srel = ppc64_elf_tdata (ibfd)->relgot;
10758 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10760 struct got_entry *ent;
10762 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10764 unsigned int num = 1;
10765 ent->got.offset = s->size;
10766 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10768 s->size += num * 8;
10770 srel->size += num * sizeof (Elf64_External_Rela);
10771 else if ((*lgot_masks & PLT_IFUNC) != 0)
10773 htab->reliplt->size
10774 += num * sizeof (Elf64_External_Rela);
10775 htab->got_reli_size
10776 += num * sizeof (Elf64_External_Rela);
10782 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10784 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10786 struct got_entry *ent;
10788 if (!is_ppc64_elf (ibfd))
10791 ent = ppc64_tlsld_got (ibfd);
10792 if (!ent->is_indirect
10793 && ent->got.offset != (bfd_vma) -1)
10795 asection *s = ppc64_elf_tdata (ibfd)->got;
10796 ent->got.offset = s->size;
10800 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10801 srel->size += sizeof (Elf64_External_Rela);
10806 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10807 if (!done_something)
10808 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10812 if (!is_ppc64_elf (ibfd))
10815 got = ppc64_elf_tdata (ibfd)->got;
10818 done_something = got->rawsize != got->size;
10819 if (done_something)
10824 if (done_something)
10825 (*htab->layout_sections_again) ();
10827 /* Set up for second pass over toc sections to recalculate elf_gp
10828 on input sections. */
10829 htab->toc_bfd = NULL;
10830 htab->toc_first_sec = NULL;
10831 htab->second_toc_pass = TRUE;
10832 return done_something;
10835 /* Called after second pass of multitoc partitioning. */
10838 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10840 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10842 /* After the second pass, toc_curr tracks the TOC offset used
10843 for code sections below in ppc64_elf_next_input_section. */
10844 htab->toc_curr = TOC_BASE_OFF;
10847 /* No toc references were found in ISEC. If the code in ISEC makes no
10848 calls, then there's no need to use toc adjusting stubs when branching
10849 into ISEC. Actually, indirect calls from ISEC are OK as they will
10850 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10851 needed, and 2 if a cyclical call-graph was found but no other reason
10852 for a stub was detected. If called from the top level, a return of
10853 2 means the same as a return of 0. */
10856 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10860 /* Mark this section as checked. */
10861 isec->call_check_done = 1;
10863 /* We know none of our code bearing sections will need toc stubs. */
10864 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10867 if (isec->size == 0)
10870 if (isec->output_section == NULL)
10874 if (isec->reloc_count != 0)
10876 Elf_Internal_Rela *relstart, *rel;
10877 Elf_Internal_Sym *local_syms;
10878 struct ppc_link_hash_table *htab;
10880 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10881 info->keep_memory);
10882 if (relstart == NULL)
10885 /* Look for branches to outside of this section. */
10887 htab = ppc_hash_table (info);
10891 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10893 enum elf_ppc64_reloc_type r_type;
10894 unsigned long r_symndx;
10895 struct elf_link_hash_entry *h;
10896 struct ppc_link_hash_entry *eh;
10897 Elf_Internal_Sym *sym;
10899 struct _opd_sec_data *opd;
10903 r_type = ELF64_R_TYPE (rel->r_info);
10904 if (r_type != R_PPC64_REL24
10905 && r_type != R_PPC64_REL14
10906 && r_type != R_PPC64_REL14_BRTAKEN
10907 && r_type != R_PPC64_REL14_BRNTAKEN)
10910 r_symndx = ELF64_R_SYM (rel->r_info);
10911 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10918 /* Calls to dynamic lib functions go through a plt call stub
10920 eh = (struct ppc_link_hash_entry *) h;
10922 && (eh->elf.plt.plist != NULL
10924 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10930 if (sym_sec == NULL)
10931 /* Ignore other undefined symbols. */
10934 /* Assume branches to other sections not included in the
10935 link need stubs too, to cover -R and absolute syms. */
10936 if (sym_sec->output_section == NULL)
10943 sym_value = sym->st_value;
10946 if (h->root.type != bfd_link_hash_defined
10947 && h->root.type != bfd_link_hash_defweak)
10949 sym_value = h->root.u.def.value;
10951 sym_value += rel->r_addend;
10953 /* If this branch reloc uses an opd sym, find the code section. */
10954 opd = get_opd_info (sym_sec);
10957 if (h == NULL && opd->adjust != NULL)
10961 adjust = opd->adjust[sym->st_value / 8];
10963 /* Assume deleted functions won't ever be called. */
10965 sym_value += adjust;
10968 dest = opd_entry_value (sym_sec, sym_value,
10969 &sym_sec, NULL, FALSE);
10970 if (dest == (bfd_vma) -1)
10975 + sym_sec->output_offset
10976 + sym_sec->output_section->vma);
10978 /* Ignore branch to self. */
10979 if (sym_sec == isec)
10982 /* If the called function uses the toc, we need a stub. */
10983 if (sym_sec->has_toc_reloc
10984 || sym_sec->makes_toc_func_call)
10990 /* Assume any branch that needs a long branch stub might in fact
10991 need a plt_branch stub. A plt_branch stub uses r2. */
10992 else if (dest - (isec->output_offset
10993 + isec->output_section->vma
10994 + rel->r_offset) + (1 << 25) >= (2 << 25))
11000 /* If calling back to a section in the process of being
11001 tested, we can't say for sure that no toc adjusting stubs
11002 are needed, so don't return zero. */
11003 else if (sym_sec->call_check_in_progress)
11006 /* Branches to another section that itself doesn't have any TOC
11007 references are OK. Recursively call ourselves to check. */
11008 else if (!sym_sec->call_check_done)
11012 /* Mark current section as indeterminate, so that other
11013 sections that call back to current won't be marked as
11015 isec->call_check_in_progress = 1;
11016 recur = toc_adjusting_stub_needed (info, sym_sec);
11017 isec->call_check_in_progress = 0;
11028 if (local_syms != NULL
11029 && (elf_symtab_hdr (isec->owner).contents
11030 != (unsigned char *) local_syms))
11032 if (elf_section_data (isec)->relocs != relstart)
11037 && isec->map_head.s != NULL
11038 && (strcmp (isec->output_section->name, ".init") == 0
11039 || strcmp (isec->output_section->name, ".fini") == 0))
11041 if (isec->map_head.s->has_toc_reloc
11042 || isec->map_head.s->makes_toc_func_call)
11044 else if (!isec->map_head.s->call_check_done)
11047 isec->call_check_in_progress = 1;
11048 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11049 isec->call_check_in_progress = 0;
11056 isec->makes_toc_func_call = 1;
11061 /* The linker repeatedly calls this function for each input section,
11062 in the order that input sections are linked into output sections.
11063 Build lists of input sections to determine groupings between which
11064 we may insert linker stubs. */
11067 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11069 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11074 if ((isec->output_section->flags & SEC_CODE) != 0
11075 && isec->output_section->index <= htab->top_index)
11077 asection **list = htab->input_list + isec->output_section->index;
11078 /* Steal the link_sec pointer for our list. */
11079 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11080 /* This happens to make the list in reverse order,
11081 which is what we want. */
11082 PREV_SEC (isec) = *list;
11086 if (htab->multi_toc_needed)
11088 /* If a code section has a function that uses the TOC then we need
11089 to use the right TOC (obviously). Also, make sure that .opd gets
11090 the correct TOC value for R_PPC64_TOC relocs that don't have or
11091 can't find their function symbol (shouldn't ever happen now).
11092 Also specially treat .fixup for the linux kernel. .fixup
11093 contains branches, but only back to the function that hit an
11095 if (isec->has_toc_reloc
11096 || (isec->flags & SEC_CODE) == 0
11097 || strcmp (isec->name, ".fixup") == 0)
11099 if (elf_gp (isec->owner) != 0)
11100 htab->toc_curr = elf_gp (isec->owner);
11104 if (!isec->call_check_done
11105 && toc_adjusting_stub_needed (info, isec) < 0)
11107 /* If we make a local call from this section, ie. a branch
11108 without a following nop, then we have no place to put a
11109 toc restoring insn. We must use the same toc group as
11111 Testing makes_toc_func_call actually tests for *any*
11112 calls to functions that need a good toc pointer. A more
11113 precise test would be better, as this one will set
11114 incorrect values for pasted .init/.fini fragments.
11115 (Fixed later in check_pasted_section.) */
11116 if (isec->makes_toc_func_call
11117 && elf_gp (isec->owner) != 0)
11118 htab->toc_curr = elf_gp (isec->owner);
11122 /* Functions that don't use the TOC can belong in any TOC group.
11123 Use the last TOC base. */
11124 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11128 /* Check that all .init and .fini sections use the same toc, if they
11129 have toc relocs. */
11132 check_pasted_section (struct bfd_link_info *info, const char *name)
11134 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11138 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11139 bfd_vma toc_off = 0;
11142 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11143 if (i->has_toc_reloc)
11146 toc_off = htab->stub_group[i->id].toc_off;
11147 else if (toc_off != htab->stub_group[i->id].toc_off)
11152 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11153 if (i->makes_toc_func_call)
11155 toc_off = htab->stub_group[i->id].toc_off;
11159 /* Make sure the whole pasted function uses the same toc offset. */
11161 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11162 htab->stub_group[i->id].toc_off = toc_off;
11168 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11170 return (check_pasted_section (info, ".init")
11171 & check_pasted_section (info, ".fini"));
11174 /* See whether we can group stub sections together. Grouping stub
11175 sections may result in fewer stubs. More importantly, we need to
11176 put all .init* and .fini* stubs at the beginning of the .init or
11177 .fini output sections respectively, because glibc splits the
11178 _init and _fini functions into multiple parts. Putting a stub in
11179 the middle of a function is not a good idea. */
11182 group_sections (struct ppc_link_hash_table *htab,
11183 bfd_size_type stub_group_size,
11184 bfd_boolean stubs_always_before_branch)
11187 bfd_size_type stub14_group_size;
11188 bfd_boolean suppress_size_errors;
11190 suppress_size_errors = FALSE;
11191 stub14_group_size = stub_group_size;
11192 if (stub_group_size == 1)
11194 /* Default values. */
11195 if (stubs_always_before_branch)
11197 stub_group_size = 0x1e00000;
11198 stub14_group_size = 0x7800;
11202 stub_group_size = 0x1c00000;
11203 stub14_group_size = 0x7000;
11205 suppress_size_errors = TRUE;
11208 list = htab->input_list + htab->top_index;
11211 asection *tail = *list;
11212 while (tail != NULL)
11216 bfd_size_type total;
11217 bfd_boolean big_sec;
11221 total = tail->size;
11222 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11223 && ppc64_elf_section_data (tail)->has_14bit_branch
11224 ? stub14_group_size : stub_group_size);
11225 if (big_sec && !suppress_size_errors)
11226 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11227 tail->owner, tail);
11228 curr_toc = htab->stub_group[tail->id].toc_off;
11230 while ((prev = PREV_SEC (curr)) != NULL
11231 && ((total += curr->output_offset - prev->output_offset)
11232 < (ppc64_elf_section_data (prev) != NULL
11233 && ppc64_elf_section_data (prev)->has_14bit_branch
11234 ? stub14_group_size : stub_group_size))
11235 && htab->stub_group[prev->id].toc_off == curr_toc)
11238 /* OK, the size from the start of CURR to the end is less
11239 than stub_group_size and thus can be handled by one stub
11240 section. (or the tail section is itself larger than
11241 stub_group_size, in which case we may be toast.) We
11242 should really be keeping track of the total size of stubs
11243 added here, as stubs contribute to the final output
11244 section size. That's a little tricky, and this way will
11245 only break if stubs added make the total size more than
11246 2^25, ie. for the default stub_group_size, if stubs total
11247 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11250 prev = PREV_SEC (tail);
11251 /* Set up this stub group. */
11252 htab->stub_group[tail->id].link_sec = curr;
11254 while (tail != curr && (tail = prev) != NULL);
11256 /* But wait, there's more! Input sections up to stub_group_size
11257 bytes before the stub section can be handled by it too.
11258 Don't do this if we have a really large section after the
11259 stubs, as adding more stubs increases the chance that
11260 branches may not reach into the stub section. */
11261 if (!stubs_always_before_branch && !big_sec)
11264 while (prev != NULL
11265 && ((total += tail->output_offset - prev->output_offset)
11266 < (ppc64_elf_section_data (prev) != NULL
11267 && ppc64_elf_section_data (prev)->has_14bit_branch
11268 ? stub14_group_size : stub_group_size))
11269 && htab->stub_group[prev->id].toc_off == curr_toc)
11272 prev = PREV_SEC (tail);
11273 htab->stub_group[tail->id].link_sec = curr;
11279 while (list-- != htab->input_list);
11280 free (htab->input_list);
11284 static const unsigned char glink_eh_frame_cie[] =
11286 0, 0, 0, 16, /* length. */
11287 0, 0, 0, 0, /* id. */
11288 1, /* CIE version. */
11289 'z', 'R', 0, /* Augmentation string. */
11290 4, /* Code alignment. */
11291 0x78, /* Data alignment. */
11293 1, /* Augmentation size. */
11294 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11295 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11298 /* Stripping output sections is normally done before dynamic section
11299 symbols have been allocated. This function is called later, and
11300 handles cases like htab->brlt which is mapped to its own output
11304 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11306 if (isec->size == 0
11307 && isec->output_section->size == 0
11308 && !(isec->output_section->flags & SEC_KEEP)
11309 && !bfd_section_removed_from_list (info->output_bfd,
11310 isec->output_section)
11311 && elf_section_data (isec->output_section)->dynindx == 0)
11313 isec->output_section->flags |= SEC_EXCLUDE;
11314 bfd_section_list_remove (info->output_bfd, isec->output_section);
11315 info->output_bfd->section_count--;
11319 /* Determine and set the size of the stub section for a final link.
11321 The basic idea here is to examine all the relocations looking for
11322 PC-relative calls to a target that is unreachable with a "bl"
11326 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11327 bfd_boolean plt_static_chain, int plt_thread_safe,
11328 int plt_stub_align)
11330 bfd_size_type stub_group_size;
11331 bfd_boolean stubs_always_before_branch;
11332 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11337 htab->plt_static_chain = plt_static_chain;
11338 htab->plt_stub_align = plt_stub_align;
11339 if (plt_thread_safe == -1 && !info->executable)
11340 plt_thread_safe = 1;
11341 if (plt_thread_safe == -1)
11343 static const char *const thread_starter[] =
11347 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11349 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11350 "mq_notify", "create_timer",
11354 "GOMP_parallel_start",
11355 "GOMP_parallel_loop_static_start",
11356 "GOMP_parallel_loop_dynamic_start",
11357 "GOMP_parallel_loop_guided_start",
11358 "GOMP_parallel_loop_runtime_start",
11359 "GOMP_parallel_sections_start",
11363 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11365 struct elf_link_hash_entry *h;
11366 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11367 FALSE, FALSE, TRUE);
11368 plt_thread_safe = h != NULL && h->ref_regular;
11369 if (plt_thread_safe)
11373 htab->plt_thread_safe = plt_thread_safe;
11374 htab->dot_toc_dot = ((struct ppc_link_hash_entry *)
11375 elf_link_hash_lookup (&htab->elf, ".TOC.",
11376 FALSE, FALSE, TRUE));
11377 stubs_always_before_branch = group_size < 0;
11378 if (group_size < 0)
11379 stub_group_size = -group_size;
11381 stub_group_size = group_size;
11383 group_sections (htab, stub_group_size, stubs_always_before_branch);
11388 unsigned int bfd_indx;
11389 asection *stub_sec;
11391 htab->stub_iteration += 1;
11393 for (input_bfd = info->input_bfds, bfd_indx = 0;
11395 input_bfd = input_bfd->link_next, bfd_indx++)
11397 Elf_Internal_Shdr *symtab_hdr;
11399 Elf_Internal_Sym *local_syms = NULL;
11401 if (!is_ppc64_elf (input_bfd))
11404 /* We'll need the symbol table in a second. */
11405 symtab_hdr = &elf_symtab_hdr (input_bfd);
11406 if (symtab_hdr->sh_info == 0)
11409 /* Walk over each section attached to the input bfd. */
11410 for (section = input_bfd->sections;
11412 section = section->next)
11414 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11416 /* If there aren't any relocs, then there's nothing more
11418 if ((section->flags & SEC_RELOC) == 0
11419 || (section->flags & SEC_ALLOC) == 0
11420 || (section->flags & SEC_LOAD) == 0
11421 || (section->flags & SEC_CODE) == 0
11422 || section->reloc_count == 0)
11425 /* If this section is a link-once section that will be
11426 discarded, then don't create any stubs. */
11427 if (section->output_section == NULL
11428 || section->output_section->owner != info->output_bfd)
11431 /* Get the relocs. */
11433 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11434 info->keep_memory);
11435 if (internal_relocs == NULL)
11436 goto error_ret_free_local;
11438 /* Now examine each relocation. */
11439 irela = internal_relocs;
11440 irelaend = irela + section->reloc_count;
11441 for (; irela < irelaend; irela++)
11443 enum elf_ppc64_reloc_type r_type;
11444 unsigned int r_indx;
11445 enum ppc_stub_type stub_type;
11446 struct ppc_stub_hash_entry *stub_entry;
11447 asection *sym_sec, *code_sec;
11448 bfd_vma sym_value, code_value;
11449 bfd_vma destination;
11450 bfd_boolean ok_dest;
11451 struct ppc_link_hash_entry *hash;
11452 struct ppc_link_hash_entry *fdh;
11453 struct elf_link_hash_entry *h;
11454 Elf_Internal_Sym *sym;
11456 const asection *id_sec;
11457 struct _opd_sec_data *opd;
11458 struct plt_entry *plt_ent;
11460 r_type = ELF64_R_TYPE (irela->r_info);
11461 r_indx = ELF64_R_SYM (irela->r_info);
11463 if (r_type >= R_PPC64_max)
11465 bfd_set_error (bfd_error_bad_value);
11466 goto error_ret_free_internal;
11469 /* Only look for stubs on branch instructions. */
11470 if (r_type != R_PPC64_REL24
11471 && r_type != R_PPC64_REL14
11472 && r_type != R_PPC64_REL14_BRTAKEN
11473 && r_type != R_PPC64_REL14_BRNTAKEN)
11476 /* Now determine the call target, its name, value,
11478 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11479 r_indx, input_bfd))
11480 goto error_ret_free_internal;
11481 hash = (struct ppc_link_hash_entry *) h;
11488 sym_value = sym->st_value;
11491 else if (hash->elf.root.type == bfd_link_hash_defined
11492 || hash->elf.root.type == bfd_link_hash_defweak)
11494 sym_value = hash->elf.root.u.def.value;
11495 if (sym_sec->output_section != NULL)
11498 else if (hash->elf.root.type == bfd_link_hash_undefweak
11499 || hash->elf.root.type == bfd_link_hash_undefined)
11501 /* Recognise an old ABI func code entry sym, and
11502 use the func descriptor sym instead if it is
11504 if (hash->elf.root.root.string[0] == '.'
11505 && (fdh = lookup_fdh (hash, htab)) != NULL)
11507 if (fdh->elf.root.type == bfd_link_hash_defined
11508 || fdh->elf.root.type == bfd_link_hash_defweak)
11510 sym_sec = fdh->elf.root.u.def.section;
11511 sym_value = fdh->elf.root.u.def.value;
11512 if (sym_sec->output_section != NULL)
11521 bfd_set_error (bfd_error_bad_value);
11522 goto error_ret_free_internal;
11528 sym_value += irela->r_addend;
11529 destination = (sym_value
11530 + sym_sec->output_offset
11531 + sym_sec->output_section->vma);
11534 code_sec = sym_sec;
11535 code_value = sym_value;
11536 opd = get_opd_info (sym_sec);
11541 if (hash == NULL && opd->adjust != NULL)
11543 long adjust = opd->adjust[sym_value / 8];
11546 code_value += adjust;
11547 sym_value += adjust;
11549 dest = opd_entry_value (sym_sec, sym_value,
11550 &code_sec, &code_value, FALSE);
11551 if (dest != (bfd_vma) -1)
11553 destination = dest;
11556 /* Fixup old ABI sym to point at code
11558 hash->elf.root.type = bfd_link_hash_defweak;
11559 hash->elf.root.u.def.section = code_sec;
11560 hash->elf.root.u.def.value = code_value;
11565 /* Determine what (if any) linker stub is needed. */
11567 stub_type = ppc_type_of_stub (section, irela, &hash,
11568 &plt_ent, destination);
11570 if (stub_type != ppc_stub_plt_call)
11572 /* Check whether we need a TOC adjusting stub.
11573 Since the linker pastes together pieces from
11574 different object files when creating the
11575 _init and _fini functions, it may be that a
11576 call to what looks like a local sym is in
11577 fact a call needing a TOC adjustment. */
11578 if (code_sec != NULL
11579 && code_sec->output_section != NULL
11580 && (htab->stub_group[code_sec->id].toc_off
11581 != htab->stub_group[section->id].toc_off)
11582 && (code_sec->has_toc_reloc
11583 || code_sec->makes_toc_func_call))
11584 stub_type = ppc_stub_long_branch_r2off;
11587 if (stub_type == ppc_stub_none)
11590 /* __tls_get_addr calls might be eliminated. */
11591 if (stub_type != ppc_stub_plt_call
11593 && (hash == htab->tls_get_addr
11594 || hash == htab->tls_get_addr_fd)
11595 && section->has_tls_reloc
11596 && irela != internal_relocs)
11598 /* Get tls info. */
11599 unsigned char *tls_mask;
11601 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11602 irela - 1, input_bfd))
11603 goto error_ret_free_internal;
11604 if (*tls_mask != 0)
11608 if (stub_type == ppc_stub_plt_call
11609 && irela + 1 < irelaend
11610 && irela[1].r_offset == irela->r_offset + 4
11611 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11613 if (!tocsave_find (htab, INSERT,
11614 &local_syms, irela + 1, input_bfd))
11615 goto error_ret_free_internal;
11617 else if (stub_type == ppc_stub_plt_call)
11618 stub_type = ppc_stub_plt_call_r2save;
11620 /* Support for grouping stub sections. */
11621 id_sec = htab->stub_group[section->id].link_sec;
11623 /* Get the name of this stub. */
11624 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11626 goto error_ret_free_internal;
11628 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11629 stub_name, FALSE, FALSE);
11630 if (stub_entry != NULL)
11632 /* The proper stub has already been created. */
11634 if (stub_type == ppc_stub_plt_call_r2save)
11635 stub_entry->stub_type = stub_type;
11639 stub_entry = ppc_add_stub (stub_name, section, info);
11640 if (stub_entry == NULL)
11643 error_ret_free_internal:
11644 if (elf_section_data (section)->relocs == NULL)
11645 free (internal_relocs);
11646 error_ret_free_local:
11647 if (local_syms != NULL
11648 && (symtab_hdr->contents
11649 != (unsigned char *) local_syms))
11654 stub_entry->stub_type = stub_type;
11655 if (stub_type != ppc_stub_plt_call
11656 && stub_type != ppc_stub_plt_call_r2save)
11658 stub_entry->target_value = code_value;
11659 stub_entry->target_section = code_sec;
11663 stub_entry->target_value = sym_value;
11664 stub_entry->target_section = sym_sec;
11666 stub_entry->h = hash;
11667 stub_entry->plt_ent = plt_ent;
11668 stub_entry->addend = irela->r_addend;
11670 if (stub_entry->h != NULL)
11671 htab->stub_globals += 1;
11674 /* We're done with the internal relocs, free them. */
11675 if (elf_section_data (section)->relocs != internal_relocs)
11676 free (internal_relocs);
11679 if (local_syms != NULL
11680 && symtab_hdr->contents != (unsigned char *) local_syms)
11682 if (!info->keep_memory)
11685 symtab_hdr->contents = (unsigned char *) local_syms;
11689 /* We may have added some stubs. Find out the new size of the
11691 for (stub_sec = htab->stub_bfd->sections;
11693 stub_sec = stub_sec->next)
11694 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11696 stub_sec->rawsize = stub_sec->size;
11697 stub_sec->size = 0;
11698 stub_sec->reloc_count = 0;
11699 stub_sec->flags &= ~SEC_RELOC;
11702 htab->brlt->size = 0;
11703 htab->brlt->reloc_count = 0;
11704 htab->brlt->flags &= ~SEC_RELOC;
11705 if (htab->relbrlt != NULL)
11706 htab->relbrlt->size = 0;
11708 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11710 if (info->emitrelocations
11711 && htab->glink != NULL && htab->glink->size != 0)
11713 htab->glink->reloc_count = 1;
11714 htab->glink->flags |= SEC_RELOC;
11717 if (htab->glink_eh_frame != NULL
11718 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11719 && htab->glink_eh_frame->output_section->size != 0)
11721 size_t size = 0, align;
11723 for (stub_sec = htab->stub_bfd->sections;
11725 stub_sec = stub_sec->next)
11726 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11728 if (htab->glink != NULL && htab->glink->size != 0)
11731 size += sizeof (glink_eh_frame_cie);
11733 align <<= htab->glink_eh_frame->output_section->alignment_power;
11735 size = (size + align) & ~align;
11736 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11737 htab->glink_eh_frame->size = size;
11740 if (htab->plt_stub_align != 0)
11741 for (stub_sec = htab->stub_bfd->sections;
11743 stub_sec = stub_sec->next)
11744 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11745 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11746 & (-1 << htab->plt_stub_align));
11748 for (stub_sec = htab->stub_bfd->sections;
11750 stub_sec = stub_sec->next)
11751 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11752 && stub_sec->rawsize != stub_sec->size)
11755 /* Exit from this loop when no stubs have been added, and no stubs
11756 have changed size. */
11757 if (stub_sec == NULL
11758 && (htab->glink_eh_frame == NULL
11759 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11762 /* Ask the linker to do its stuff. */
11763 (*htab->layout_sections_again) ();
11766 maybe_strip_output (info, htab->brlt);
11767 if (htab->glink_eh_frame != NULL)
11768 maybe_strip_output (info, htab->glink_eh_frame);
11773 /* Called after we have determined section placement. If sections
11774 move, we'll be called again. Provide a value for TOCstart. */
11777 ppc64_elf_toc (bfd *obfd)
11782 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11783 order. The TOC starts where the first of these sections starts. */
11784 s = bfd_get_section_by_name (obfd, ".got");
11785 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11786 s = bfd_get_section_by_name (obfd, ".toc");
11787 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11788 s = bfd_get_section_by_name (obfd, ".tocbss");
11789 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11790 s = bfd_get_section_by_name (obfd, ".plt");
11791 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11793 /* This may happen for
11794 o references to TOC base (SYM@toc / TOC[tc0]) without a
11796 o bad linker script
11797 o --gc-sections and empty TOC sections
11799 FIXME: Warn user? */
11801 /* Look for a likely section. We probably won't even be
11803 for (s = obfd->sections; s != NULL; s = s->next)
11804 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11806 == (SEC_ALLOC | SEC_SMALL_DATA))
11809 for (s = obfd->sections; s != NULL; s = s->next)
11810 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11811 == (SEC_ALLOC | SEC_SMALL_DATA))
11814 for (s = obfd->sections; s != NULL; s = s->next)
11815 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11819 for (s = obfd->sections; s != NULL; s = s->next)
11820 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11826 TOCstart = s->output_section->vma + s->output_offset;
11831 /* Build all the stubs associated with the current output file.
11832 The stubs are kept in a hash table attached to the main linker
11833 hash table. This function is called via gldelf64ppc_finish. */
11836 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11837 struct bfd_link_info *info,
11840 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11841 asection *stub_sec;
11843 int stub_sec_count = 0;
11848 htab->emit_stub_syms = emit_stub_syms;
11850 /* Allocate memory to hold the linker stubs. */
11851 for (stub_sec = htab->stub_bfd->sections;
11853 stub_sec = stub_sec->next)
11854 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11855 && stub_sec->size != 0)
11857 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11858 if (stub_sec->contents == NULL)
11860 /* We want to check that built size is the same as calculated
11861 size. rawsize is a convenient location to use. */
11862 stub_sec->rawsize = stub_sec->size;
11863 stub_sec->size = 0;
11866 if (htab->glink != NULL && htab->glink->size != 0)
11871 /* Build the .glink plt call stub. */
11872 if (htab->emit_stub_syms)
11874 struct elf_link_hash_entry *h;
11875 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11876 TRUE, FALSE, FALSE);
11879 if (h->root.type == bfd_link_hash_new)
11881 h->root.type = bfd_link_hash_defined;
11882 h->root.u.def.section = htab->glink;
11883 h->root.u.def.value = 8;
11884 h->ref_regular = 1;
11885 h->def_regular = 1;
11886 h->ref_regular_nonweak = 1;
11887 h->forced_local = 1;
11891 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11892 if (info->emitrelocations)
11894 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11897 r->r_offset = (htab->glink->output_offset
11898 + htab->glink->output_section->vma);
11899 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11900 r->r_addend = plt0;
11902 p = htab->glink->contents;
11903 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11904 bfd_put_64 (htab->glink->owner, plt0, p);
11906 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11908 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11910 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11912 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11914 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11916 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11918 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11920 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11922 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11924 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11926 bfd_put_32 (htab->glink->owner, BCTR, p);
11928 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11930 bfd_put_32 (htab->glink->owner, NOP, p);
11934 /* Build the .glink lazy link call stubs. */
11936 while (p < htab->glink->contents + htab->glink->size)
11940 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11945 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11947 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11950 bfd_put_32 (htab->glink->owner,
11951 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11955 htab->glink->rawsize = p - htab->glink->contents;
11958 if (htab->brlt->size != 0)
11960 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11962 if (htab->brlt->contents == NULL)
11965 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11967 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11968 htab->relbrlt->size);
11969 if (htab->relbrlt->contents == NULL)
11973 if (htab->glink_eh_frame != NULL
11974 && htab->glink_eh_frame->size != 0)
11977 bfd_byte *last_fde;
11978 size_t last_fde_len, size, align, pad;
11980 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
11983 htab->glink_eh_frame->contents = p;
11986 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11988 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
11989 /* CIE length (rewrite in case little-endian). */
11990 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
11991 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
11992 p += sizeof (glink_eh_frame_cie);
11994 for (stub_sec = htab->stub_bfd->sections;
11996 stub_sec = stub_sec->next)
11997 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12002 bfd_put_32 (htab->elf.dynobj, 16, p);
12005 val = p - htab->glink_eh_frame->contents;
12006 bfd_put_32 (htab->elf.dynobj, val, p);
12008 /* Offset to stub section. */
12009 val = (stub_sec->output_section->vma
12010 + stub_sec->output_offset);
12011 val -= (htab->glink_eh_frame->output_section->vma
12012 + htab->glink_eh_frame->output_offset);
12013 val -= p - htab->glink_eh_frame->contents;
12014 if (val + 0x80000000 > 0xffffffff)
12016 info->callbacks->einfo
12017 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12021 bfd_put_32 (htab->elf.dynobj, val, p);
12023 /* stub section size. */
12024 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12026 /* Augmentation. */
12031 if (htab->glink != NULL && htab->glink->size != 0)
12036 bfd_put_32 (htab->elf.dynobj, 20, p);
12039 val = p - htab->glink_eh_frame->contents;
12040 bfd_put_32 (htab->elf.dynobj, val, p);
12042 /* Offset to .glink. */
12043 val = (htab->glink->output_section->vma
12044 + htab->glink->output_offset
12046 val -= (htab->glink_eh_frame->output_section->vma
12047 + htab->glink_eh_frame->output_offset);
12048 val -= p - htab->glink_eh_frame->contents;
12049 if (val + 0x80000000 > 0xffffffff)
12051 info->callbacks->einfo
12052 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12053 htab->glink->name);
12056 bfd_put_32 (htab->elf.dynobj, val, p);
12059 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
12061 /* Augmentation. */
12064 *p++ = DW_CFA_advance_loc + 1;
12065 *p++ = DW_CFA_register;
12068 *p++ = DW_CFA_advance_loc + 4;
12069 *p++ = DW_CFA_restore_extended;
12072 /* Subsume any padding into the last FDE if user .eh_frame
12073 sections are aligned more than glink_eh_frame. Otherwise any
12074 zero padding will be seen as a terminator. */
12075 size = p - htab->glink_eh_frame->contents;
12077 align <<= htab->glink_eh_frame->output_section->alignment_power;
12079 pad = ((size + align) & ~align) - size;
12080 htab->glink_eh_frame->size = size + pad;
12081 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12084 /* Build the stubs as directed by the stub hash table. */
12085 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12087 if (htab->relbrlt != NULL)
12088 htab->relbrlt->reloc_count = 0;
12090 if (htab->plt_stub_align != 0)
12091 for (stub_sec = htab->stub_bfd->sections;
12093 stub_sec = stub_sec->next)
12094 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12095 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12096 & (-1 << htab->plt_stub_align));
12098 for (stub_sec = htab->stub_bfd->sections;
12100 stub_sec = stub_sec->next)
12101 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12103 stub_sec_count += 1;
12104 if (stub_sec->rawsize != stub_sec->size)
12108 if (stub_sec != NULL
12109 || htab->glink->rawsize != htab->glink->size
12110 || (htab->glink_eh_frame != NULL
12111 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12113 htab->stub_error = TRUE;
12114 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12117 if (htab->stub_error)
12122 *stats = bfd_malloc (500);
12123 if (*stats == NULL)
12126 sprintf (*stats, _("linker stubs in %u group%s\n"
12128 " toc adjust %lu\n"
12129 " long branch %lu\n"
12130 " long toc adj %lu\n"
12132 " plt call toc %lu"),
12134 stub_sec_count == 1 ? "" : "s",
12135 htab->stub_count[ppc_stub_long_branch - 1],
12136 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12137 htab->stub_count[ppc_stub_plt_branch - 1],
12138 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12139 htab->stub_count[ppc_stub_plt_call - 1],
12140 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12145 /* This function undoes the changes made by add_symbol_adjust. */
12148 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12150 struct ppc_link_hash_entry *eh;
12152 if (h->root.type == bfd_link_hash_indirect)
12155 eh = (struct ppc_link_hash_entry *) h;
12156 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12159 eh->elf.root.type = bfd_link_hash_undefined;
12164 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12166 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12169 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12172 /* What to do when ld finds relocations against symbols defined in
12173 discarded sections. */
12175 static unsigned int
12176 ppc64_elf_action_discarded (asection *sec)
12178 if (strcmp (".opd", sec->name) == 0)
12181 if (strcmp (".toc", sec->name) == 0)
12184 if (strcmp (".toc1", sec->name) == 0)
12187 return _bfd_elf_default_action_discarded (sec);
12190 /* The RELOCATE_SECTION function is called by the ELF backend linker
12191 to handle the relocations for a section.
12193 The relocs are always passed as Rela structures; if the section
12194 actually uses Rel structures, the r_addend field will always be
12197 This function is responsible for adjust the section contents as
12198 necessary, and (if using Rela relocs and generating a
12199 relocatable output file) adjusting the reloc addend as
12202 This function does not have to worry about setting the reloc
12203 address or the reloc symbol index.
12205 LOCAL_SYMS is a pointer to the swapped in local symbols.
12207 LOCAL_SECTIONS is an array giving the section in the input file
12208 corresponding to the st_shndx field of each local symbol.
12210 The global hash table entry for the global symbols can be found
12211 via elf_sym_hashes (input_bfd).
12213 When generating relocatable output, this function must handle
12214 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12215 going to be the section symbol corresponding to the output
12216 section, which means that the addend must be adjusted
12220 ppc64_elf_relocate_section (bfd *output_bfd,
12221 struct bfd_link_info *info,
12223 asection *input_section,
12224 bfd_byte *contents,
12225 Elf_Internal_Rela *relocs,
12226 Elf_Internal_Sym *local_syms,
12227 asection **local_sections)
12229 struct ppc_link_hash_table *htab;
12230 Elf_Internal_Shdr *symtab_hdr;
12231 struct elf_link_hash_entry **sym_hashes;
12232 Elf_Internal_Rela *rel;
12233 Elf_Internal_Rela *relend;
12234 Elf_Internal_Rela outrel;
12236 struct got_entry **local_got_ents;
12238 bfd_boolean ret = TRUE;
12239 bfd_boolean is_opd;
12240 /* Assume 'at' branch hints. */
12241 bfd_boolean is_isa_v2 = TRUE;
12242 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12244 /* Initialize howto table if needed. */
12245 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12248 htab = ppc_hash_table (info);
12252 /* Don't relocate stub sections. */
12253 if (input_section->owner == htab->stub_bfd)
12256 BFD_ASSERT (is_ppc64_elf (input_bfd));
12258 local_got_ents = elf_local_got_ents (input_bfd);
12259 TOCstart = elf_gp (output_bfd);
12260 symtab_hdr = &elf_symtab_hdr (input_bfd);
12261 sym_hashes = elf_sym_hashes (input_bfd);
12262 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12265 relend = relocs + input_section->reloc_count;
12266 for (; rel < relend; rel++)
12268 enum elf_ppc64_reloc_type r_type;
12270 bfd_reloc_status_type r;
12271 Elf_Internal_Sym *sym;
12273 struct elf_link_hash_entry *h_elf;
12274 struct ppc_link_hash_entry *h;
12275 struct ppc_link_hash_entry *fdh;
12276 const char *sym_name;
12277 unsigned long r_symndx, toc_symndx;
12278 bfd_vma toc_addend;
12279 unsigned char tls_mask, tls_gd, tls_type;
12280 unsigned char sym_type;
12281 bfd_vma relocation;
12282 bfd_boolean unresolved_reloc;
12283 bfd_boolean warned;
12284 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12287 struct ppc_stub_hash_entry *stub_entry;
12288 bfd_vma max_br_offset;
12290 const Elf_Internal_Rela orig_rel = *rel;
12292 r_type = ELF64_R_TYPE (rel->r_info);
12293 r_symndx = ELF64_R_SYM (rel->r_info);
12295 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12296 symbol of the previous ADDR64 reloc. The symbol gives us the
12297 proper TOC base to use. */
12298 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12300 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12302 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12308 unresolved_reloc = FALSE;
12311 if (r_symndx < symtab_hdr->sh_info)
12313 /* It's a local symbol. */
12314 struct _opd_sec_data *opd;
12316 sym = local_syms + r_symndx;
12317 sec = local_sections[r_symndx];
12318 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12319 sym_type = ELF64_ST_TYPE (sym->st_info);
12320 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12321 opd = get_opd_info (sec);
12322 if (opd != NULL && opd->adjust != NULL)
12324 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12329 /* If this is a relocation against the opd section sym
12330 and we have edited .opd, adjust the reloc addend so
12331 that ld -r and ld --emit-relocs output is correct.
12332 If it is a reloc against some other .opd symbol,
12333 then the symbol value will be adjusted later. */
12334 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12335 rel->r_addend += adjust;
12337 relocation += adjust;
12343 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12344 r_symndx, symtab_hdr, sym_hashes,
12345 h_elf, sec, relocation,
12346 unresolved_reloc, warned);
12347 sym_name = h_elf->root.root.string;
12348 sym_type = h_elf->type;
12350 && sec->owner == output_bfd
12351 && strcmp (sec->name, ".opd") == 0)
12353 /* This is a symbol defined in a linker script. All
12354 such are defined in output sections, even those
12355 defined by simple assignment from a symbol defined in
12356 an input section. Transfer the symbol to an
12357 appropriate input .opd section, so that a branch to
12358 this symbol will be mapped to the location specified
12359 by the opd entry. */
12360 struct bfd_link_order *lo;
12361 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
12362 if (lo->type == bfd_indirect_link_order)
12364 asection *isec = lo->u.indirect.section;
12365 if (h_elf->root.u.def.value >= isec->output_offset
12366 && h_elf->root.u.def.value < (isec->output_offset
12369 h_elf->root.u.def.value -= isec->output_offset;
12370 h_elf->root.u.def.section = isec;
12376 if (h_elf == &htab->dot_toc_dot->elf)
12378 relocation = (TOCstart
12379 + htab->stub_group[input_section->id].toc_off);
12380 sec = bfd_abs_section_ptr;
12381 unresolved_reloc = FALSE;
12384 h = (struct ppc_link_hash_entry *) h_elf;
12386 if (sec != NULL && discarded_section (sec))
12387 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12389 ppc64_elf_howto_table[r_type], 0,
12392 if (info->relocatable)
12395 /* TLS optimizations. Replace instruction sequences and relocs
12396 based on information we collected in tls_optimize. We edit
12397 RELOCS so that --emit-relocs will output something sensible
12398 for the final instruction stream. */
12403 tls_mask = h->tls_mask;
12404 else if (local_got_ents != NULL)
12406 struct plt_entry **local_plt = (struct plt_entry **)
12407 (local_got_ents + symtab_hdr->sh_info);
12408 unsigned char *lgot_masks = (unsigned char *)
12409 (local_plt + symtab_hdr->sh_info);
12410 tls_mask = lgot_masks[r_symndx];
12413 && (r_type == R_PPC64_TLS
12414 || r_type == R_PPC64_TLSGD
12415 || r_type == R_PPC64_TLSLD))
12417 /* Check for toc tls entries. */
12418 unsigned char *toc_tls;
12420 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12421 &local_syms, rel, input_bfd))
12425 tls_mask = *toc_tls;
12428 /* Check that tls relocs are used with tls syms, and non-tls
12429 relocs are used with non-tls syms. */
12430 if (r_symndx != STN_UNDEF
12431 && r_type != R_PPC64_NONE
12433 || h->elf.root.type == bfd_link_hash_defined
12434 || h->elf.root.type == bfd_link_hash_defweak)
12435 && (IS_PPC64_TLS_RELOC (r_type)
12436 != (sym_type == STT_TLS
12437 || (sym_type == STT_SECTION
12438 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12441 && (r_type == R_PPC64_TLS
12442 || r_type == R_PPC64_TLSGD
12443 || r_type == R_PPC64_TLSLD))
12444 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12447 info->callbacks->einfo
12448 (!IS_PPC64_TLS_RELOC (r_type)
12449 ? _("%P: %H: %s used with TLS symbol `%T'\n")
12450 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
12451 input_bfd, input_section, rel->r_offset,
12452 ppc64_elf_howto_table[r_type]->name,
12456 /* Ensure reloc mapping code below stays sane. */
12457 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12458 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12459 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12460 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12461 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12462 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12463 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12464 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12465 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12466 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12474 case R_PPC64_LO_DS_OPT:
12475 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12476 if ((insn & (0x3f << 26)) != 58u << 26)
12478 insn += (14u << 26) - (58u << 26);
12479 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12480 r_type = R_PPC64_TOC16_LO;
12481 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12484 case R_PPC64_TOC16:
12485 case R_PPC64_TOC16_LO:
12486 case R_PPC64_TOC16_DS:
12487 case R_PPC64_TOC16_LO_DS:
12489 /* Check for toc tls entries. */
12490 unsigned char *toc_tls;
12493 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12494 &local_syms, rel, input_bfd);
12500 tls_mask = *toc_tls;
12501 if (r_type == R_PPC64_TOC16_DS
12502 || r_type == R_PPC64_TOC16_LO_DS)
12505 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12510 /* If we found a GD reloc pair, then we might be
12511 doing a GD->IE transition. */
12514 tls_gd = TLS_TPRELGD;
12515 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12518 else if (retval == 3)
12520 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12528 case R_PPC64_GOT_TPREL16_HI:
12529 case R_PPC64_GOT_TPREL16_HA:
12531 && (tls_mask & TLS_TPREL) == 0)
12533 rel->r_offset -= d_offset;
12534 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12535 r_type = R_PPC64_NONE;
12536 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12540 case R_PPC64_GOT_TPREL16_DS:
12541 case R_PPC64_GOT_TPREL16_LO_DS:
12543 && (tls_mask & TLS_TPREL) == 0)
12546 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12548 insn |= 0x3c0d0000; /* addis 0,13,0 */
12549 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12550 r_type = R_PPC64_TPREL16_HA;
12551 if (toc_symndx != 0)
12553 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12554 rel->r_addend = toc_addend;
12555 /* We changed the symbol. Start over in order to
12556 get h, sym, sec etc. right. */
12561 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12567 && (tls_mask & TLS_TPREL) == 0)
12569 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12570 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12573 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12574 /* Was PPC64_TLS which sits on insn boundary, now
12575 PPC64_TPREL16_LO which is at low-order half-word. */
12576 rel->r_offset += d_offset;
12577 r_type = R_PPC64_TPREL16_LO;
12578 if (toc_symndx != 0)
12580 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12581 rel->r_addend = toc_addend;
12582 /* We changed the symbol. Start over in order to
12583 get h, sym, sec etc. right. */
12588 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12592 case R_PPC64_GOT_TLSGD16_HI:
12593 case R_PPC64_GOT_TLSGD16_HA:
12594 tls_gd = TLS_TPRELGD;
12595 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12599 case R_PPC64_GOT_TLSLD16_HI:
12600 case R_PPC64_GOT_TLSLD16_HA:
12601 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12604 if ((tls_mask & tls_gd) != 0)
12605 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12606 + R_PPC64_GOT_TPREL16_DS);
12609 rel->r_offset -= d_offset;
12610 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12611 r_type = R_PPC64_NONE;
12613 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12617 case R_PPC64_GOT_TLSGD16:
12618 case R_PPC64_GOT_TLSGD16_LO:
12619 tls_gd = TLS_TPRELGD;
12620 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12624 case R_PPC64_GOT_TLSLD16:
12625 case R_PPC64_GOT_TLSLD16_LO:
12626 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12628 unsigned int insn1, insn2, insn3;
12632 offset = (bfd_vma) -1;
12633 /* If not using the newer R_PPC64_TLSGD/LD to mark
12634 __tls_get_addr calls, we must trust that the call
12635 stays with its arg setup insns, ie. that the next
12636 reloc is the __tls_get_addr call associated with
12637 the current reloc. Edit both insns. */
12638 if (input_section->has_tls_get_addr_call
12639 && rel + 1 < relend
12640 && branch_reloc_hash_match (input_bfd, rel + 1,
12641 htab->tls_get_addr,
12642 htab->tls_get_addr_fd))
12643 offset = rel[1].r_offset;
12644 if ((tls_mask & tls_gd) != 0)
12647 insn1 = bfd_get_32 (output_bfd,
12648 contents + rel->r_offset - d_offset);
12649 insn1 &= (1 << 26) - (1 << 2);
12650 insn1 |= 58 << 26; /* ld */
12651 insn2 = 0x7c636a14; /* add 3,3,13 */
12652 if (offset != (bfd_vma) -1)
12653 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12654 if ((tls_mask & TLS_EXPLICIT) == 0)
12655 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12656 + R_PPC64_GOT_TPREL16_DS);
12658 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12659 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12664 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12665 insn2 = 0x38630000; /* addi 3,3,0 */
12668 /* Was an LD reloc. */
12670 sec = local_sections[toc_symndx];
12672 r_symndx < symtab_hdr->sh_info;
12674 if (local_sections[r_symndx] == sec)
12676 if (r_symndx >= symtab_hdr->sh_info)
12677 r_symndx = STN_UNDEF;
12678 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12679 if (r_symndx != STN_UNDEF)
12680 rel->r_addend -= (local_syms[r_symndx].st_value
12681 + sec->output_offset
12682 + sec->output_section->vma);
12684 else if (toc_symndx != 0)
12686 r_symndx = toc_symndx;
12687 rel->r_addend = toc_addend;
12689 r_type = R_PPC64_TPREL16_HA;
12690 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12691 if (offset != (bfd_vma) -1)
12693 rel[1].r_info = ELF64_R_INFO (r_symndx,
12694 R_PPC64_TPREL16_LO);
12695 rel[1].r_offset = offset + d_offset;
12696 rel[1].r_addend = rel->r_addend;
12699 bfd_put_32 (output_bfd, insn1,
12700 contents + rel->r_offset - d_offset);
12701 if (offset != (bfd_vma) -1)
12703 insn3 = bfd_get_32 (output_bfd,
12704 contents + offset + 4);
12706 || insn3 == CROR_151515 || insn3 == CROR_313131)
12708 rel[1].r_offset += 4;
12709 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12712 bfd_put_32 (output_bfd, insn2, contents + offset);
12714 if ((tls_mask & tls_gd) == 0
12715 && (tls_gd == 0 || toc_symndx != 0))
12717 /* We changed the symbol. Start over in order
12718 to get h, sym, sec etc. right. */
12725 case R_PPC64_TLSGD:
12726 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12728 unsigned int insn2, insn3;
12729 bfd_vma offset = rel->r_offset;
12731 if ((tls_mask & TLS_TPRELGD) != 0)
12734 r_type = R_PPC64_NONE;
12735 insn2 = 0x7c636a14; /* add 3,3,13 */
12740 if (toc_symndx != 0)
12742 r_symndx = toc_symndx;
12743 rel->r_addend = toc_addend;
12745 r_type = R_PPC64_TPREL16_LO;
12746 rel->r_offset = offset + d_offset;
12747 insn2 = 0x38630000; /* addi 3,3,0 */
12749 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12750 /* Zap the reloc on the _tls_get_addr call too. */
12751 BFD_ASSERT (offset == rel[1].r_offset);
12752 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12753 insn3 = bfd_get_32 (output_bfd,
12754 contents + offset + 4);
12756 || insn3 == CROR_151515 || insn3 == CROR_313131)
12758 rel->r_offset += 4;
12759 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12762 bfd_put_32 (output_bfd, insn2, contents + offset);
12763 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12771 case R_PPC64_TLSLD:
12772 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12774 unsigned int insn2, insn3;
12775 bfd_vma offset = rel->r_offset;
12778 sec = local_sections[toc_symndx];
12780 r_symndx < symtab_hdr->sh_info;
12782 if (local_sections[r_symndx] == sec)
12784 if (r_symndx >= symtab_hdr->sh_info)
12785 r_symndx = STN_UNDEF;
12786 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12787 if (r_symndx != STN_UNDEF)
12788 rel->r_addend -= (local_syms[r_symndx].st_value
12789 + sec->output_offset
12790 + sec->output_section->vma);
12792 r_type = R_PPC64_TPREL16_LO;
12793 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12794 rel->r_offset = offset + d_offset;
12795 /* Zap the reloc on the _tls_get_addr call too. */
12796 BFD_ASSERT (offset == rel[1].r_offset);
12797 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12798 insn2 = 0x38630000; /* addi 3,3,0 */
12799 insn3 = bfd_get_32 (output_bfd,
12800 contents + offset + 4);
12802 || insn3 == CROR_151515 || insn3 == CROR_313131)
12804 rel->r_offset += 4;
12805 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12808 bfd_put_32 (output_bfd, insn2, contents + offset);
12814 case R_PPC64_DTPMOD64:
12815 if (rel + 1 < relend
12816 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12817 && rel[1].r_offset == rel->r_offset + 8)
12819 if ((tls_mask & TLS_GD) == 0)
12821 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12822 if ((tls_mask & TLS_TPRELGD) != 0)
12823 r_type = R_PPC64_TPREL64;
12826 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12827 r_type = R_PPC64_NONE;
12829 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12834 if ((tls_mask & TLS_LD) == 0)
12836 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12837 r_type = R_PPC64_NONE;
12838 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12843 case R_PPC64_TPREL64:
12844 if ((tls_mask & TLS_TPREL) == 0)
12846 r_type = R_PPC64_NONE;
12847 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12852 /* Handle other relocations that tweak non-addend part of insn. */
12854 max_br_offset = 1 << 25;
12855 addend = rel->r_addend;
12856 reloc_dest = DEST_NORMAL;
12862 case R_PPC64_TOCSAVE:
12863 if (relocation + addend == (rel->r_offset
12864 + input_section->output_offset
12865 + input_section->output_section->vma)
12866 && tocsave_find (htab, NO_INSERT,
12867 &local_syms, rel, input_bfd))
12869 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12871 || insn == CROR_151515 || insn == CROR_313131)
12872 bfd_put_32 (input_bfd, STD_R2_40R1,
12873 contents + rel->r_offset);
12877 /* Branch taken prediction relocations. */
12878 case R_PPC64_ADDR14_BRTAKEN:
12879 case R_PPC64_REL14_BRTAKEN:
12880 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12883 /* Branch not taken prediction relocations. */
12884 case R_PPC64_ADDR14_BRNTAKEN:
12885 case R_PPC64_REL14_BRNTAKEN:
12886 insn |= bfd_get_32 (output_bfd,
12887 contents + rel->r_offset) & ~(0x01 << 21);
12890 case R_PPC64_REL14:
12891 max_br_offset = 1 << 15;
12894 case R_PPC64_REL24:
12895 /* Calls to functions with a different TOC, such as calls to
12896 shared objects, need to alter the TOC pointer. This is
12897 done using a linkage stub. A REL24 branching to these
12898 linkage stubs needs to be followed by a nop, as the nop
12899 will be replaced with an instruction to restore the TOC
12904 && h->oh->is_func_descriptor)
12905 fdh = ppc_follow_link (h->oh);
12906 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
12908 if (stub_entry != NULL
12909 && (stub_entry->stub_type == ppc_stub_plt_call
12910 || stub_entry->stub_type == ppc_stub_plt_call_r2save
12911 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12912 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12914 bfd_boolean can_plt_call = FALSE;
12916 if (rel->r_offset + 8 <= input_section->size)
12919 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12921 || nop == CROR_151515 || nop == CROR_313131)
12924 && (h == htab->tls_get_addr_fd
12925 || h == htab->tls_get_addr)
12926 && !htab->no_tls_get_addr_opt)
12928 /* Special stub used, leave nop alone. */
12931 bfd_put_32 (input_bfd, LD_R2_40R1,
12932 contents + rel->r_offset + 4);
12933 can_plt_call = TRUE;
12939 if (stub_entry->stub_type == ppc_stub_plt_call
12940 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
12942 /* If this is a plain branch rather than a branch
12943 and link, don't require a nop. However, don't
12944 allow tail calls in a shared library as they
12945 will result in r2 being corrupted. */
12947 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12948 if (info->executable && (br & 1) == 0)
12949 can_plt_call = TRUE;
12954 && strcmp (h->elf.root.root.string,
12955 ".__libc_start_main") == 0)
12957 /* Allow crt1 branch to go via a toc adjusting stub. */
12958 can_plt_call = TRUE;
12962 info->callbacks->einfo
12963 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
12964 "recompile with -fPIC"),
12965 input_bfd, input_section, rel->r_offset, sym_name);
12967 bfd_set_error (bfd_error_bad_value);
12973 && (stub_entry->stub_type == ppc_stub_plt_call
12974 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
12975 unresolved_reloc = FALSE;
12978 if ((stub_entry == NULL
12979 || stub_entry->stub_type == ppc_stub_long_branch
12980 || stub_entry->stub_type == ppc_stub_plt_branch)
12981 && get_opd_info (sec) != NULL)
12983 /* The branch destination is the value of the opd entry. */
12984 bfd_vma off = (relocation + addend
12985 - sec->output_section->vma
12986 - sec->output_offset);
12987 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
12988 if (dest != (bfd_vma) -1)
12992 reloc_dest = DEST_OPD;
12996 /* If the branch is out of reach we ought to have a long
12998 from = (rel->r_offset
12999 + input_section->output_offset
13000 + input_section->output_section->vma);
13002 if (stub_entry != NULL
13003 && (stub_entry->stub_type == ppc_stub_long_branch
13004 || stub_entry->stub_type == ppc_stub_plt_branch)
13005 && (r_type == R_PPC64_ADDR14_BRTAKEN
13006 || r_type == R_PPC64_ADDR14_BRNTAKEN
13007 || (relocation + addend - from + max_br_offset
13008 < 2 * max_br_offset)))
13009 /* Don't use the stub if this branch is in range. */
13012 if (stub_entry != NULL)
13014 /* Munge up the value and addend so that we call the stub
13015 rather than the procedure directly. */
13016 relocation = (stub_entry->stub_offset
13017 + stub_entry->stub_sec->output_offset
13018 + stub_entry->stub_sec->output_section->vma);
13020 reloc_dest = DEST_STUB;
13022 if ((stub_entry->stub_type == ppc_stub_plt_call
13023 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13024 && (ALWAYS_EMIT_R2SAVE
13025 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13026 && rel + 1 < relend
13027 && rel[1].r_offset == rel->r_offset + 4
13028 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13036 /* Set 'a' bit. This is 0b00010 in BO field for branch
13037 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13038 for branch on CTR insns (BO == 1a00t or 1a01t). */
13039 if ((insn & (0x14 << 21)) == (0x04 << 21))
13040 insn |= 0x02 << 21;
13041 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13042 insn |= 0x08 << 21;
13048 /* Invert 'y' bit if not the default. */
13049 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13050 insn ^= 0x01 << 21;
13053 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13056 /* NOP out calls to undefined weak functions.
13057 We can thus call a weak function without first
13058 checking whether the function is defined. */
13060 && h->elf.root.type == bfd_link_hash_undefweak
13061 && h->elf.dynindx == -1
13062 && r_type == R_PPC64_REL24
13066 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13072 /* Set `addend'. */
13077 info->callbacks->einfo
13078 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13079 input_bfd, (int) r_type, sym_name);
13081 bfd_set_error (bfd_error_bad_value);
13087 case R_PPC64_TLSGD:
13088 case R_PPC64_TLSLD:
13089 case R_PPC64_TOCSAVE:
13090 case R_PPC64_GNU_VTINHERIT:
13091 case R_PPC64_GNU_VTENTRY:
13094 /* GOT16 relocations. Like an ADDR16 using the symbol's
13095 address in the GOT as relocation value instead of the
13096 symbol's value itself. Also, create a GOT entry for the
13097 symbol and put the symbol value there. */
13098 case R_PPC64_GOT_TLSGD16:
13099 case R_PPC64_GOT_TLSGD16_LO:
13100 case R_PPC64_GOT_TLSGD16_HI:
13101 case R_PPC64_GOT_TLSGD16_HA:
13102 tls_type = TLS_TLS | TLS_GD;
13105 case R_PPC64_GOT_TLSLD16:
13106 case R_PPC64_GOT_TLSLD16_LO:
13107 case R_PPC64_GOT_TLSLD16_HI:
13108 case R_PPC64_GOT_TLSLD16_HA:
13109 tls_type = TLS_TLS | TLS_LD;
13112 case R_PPC64_GOT_TPREL16_DS:
13113 case R_PPC64_GOT_TPREL16_LO_DS:
13114 case R_PPC64_GOT_TPREL16_HI:
13115 case R_PPC64_GOT_TPREL16_HA:
13116 tls_type = TLS_TLS | TLS_TPREL;
13119 case R_PPC64_GOT_DTPREL16_DS:
13120 case R_PPC64_GOT_DTPREL16_LO_DS:
13121 case R_PPC64_GOT_DTPREL16_HI:
13122 case R_PPC64_GOT_DTPREL16_HA:
13123 tls_type = TLS_TLS | TLS_DTPREL;
13126 case R_PPC64_GOT16:
13127 case R_PPC64_GOT16_LO:
13128 case R_PPC64_GOT16_HI:
13129 case R_PPC64_GOT16_HA:
13130 case R_PPC64_GOT16_DS:
13131 case R_PPC64_GOT16_LO_DS:
13134 /* Relocation is to the entry for this symbol in the global
13139 unsigned long indx = 0;
13140 struct got_entry *ent;
13142 if (tls_type == (TLS_TLS | TLS_LD)
13144 || !h->elf.def_dynamic))
13145 ent = ppc64_tlsld_got (input_bfd);
13151 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13152 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13155 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13156 /* This is actually a static link, or it is a
13157 -Bsymbolic link and the symbol is defined
13158 locally, or the symbol was forced to be local
13159 because of a version file. */
13163 BFD_ASSERT (h->elf.dynindx != -1);
13164 indx = h->elf.dynindx;
13165 unresolved_reloc = FALSE;
13167 ent = h->elf.got.glist;
13171 if (local_got_ents == NULL)
13173 ent = local_got_ents[r_symndx];
13176 for (; ent != NULL; ent = ent->next)
13177 if (ent->addend == orig_rel.r_addend
13178 && ent->owner == input_bfd
13179 && ent->tls_type == tls_type)
13185 if (ent->is_indirect)
13186 ent = ent->got.ent;
13187 offp = &ent->got.offset;
13188 got = ppc64_elf_tdata (ent->owner)->got;
13192 /* The offset must always be a multiple of 8. We use the
13193 least significant bit to record whether we have already
13194 processed this entry. */
13196 if ((off & 1) != 0)
13200 /* Generate relocs for the dynamic linker, except in
13201 the case of TLSLD where we'll use one entry per
13209 ? h->elf.type == STT_GNU_IFUNC
13210 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13211 if ((info->shared || indx != 0)
13213 || (tls_type == (TLS_TLS | TLS_LD)
13214 && !h->elf.def_dynamic)
13215 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13216 || h->elf.root.type != bfd_link_hash_undefweak))
13217 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13219 relgot = htab->reliplt;
13220 if (relgot != NULL)
13222 outrel.r_offset = (got->output_section->vma
13223 + got->output_offset
13225 outrel.r_addend = addend;
13226 if (tls_type & (TLS_LD | TLS_GD))
13228 outrel.r_addend = 0;
13229 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13230 if (tls_type == (TLS_TLS | TLS_GD))
13232 loc = relgot->contents;
13233 loc += (relgot->reloc_count++
13234 * sizeof (Elf64_External_Rela));
13235 bfd_elf64_swap_reloca_out (output_bfd,
13237 outrel.r_offset += 8;
13238 outrel.r_addend = addend;
13240 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13243 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13244 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13245 else if (tls_type == (TLS_TLS | TLS_TPREL))
13246 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13247 else if (indx != 0)
13248 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13252 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13254 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13256 /* Write the .got section contents for the sake
13258 loc = got->contents + off;
13259 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13263 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13265 outrel.r_addend += relocation;
13266 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13267 outrel.r_addend -= htab->elf.tls_sec->vma;
13269 loc = relgot->contents;
13270 loc += (relgot->reloc_count++
13271 * sizeof (Elf64_External_Rela));
13272 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13275 /* Init the .got section contents here if we're not
13276 emitting a reloc. */
13279 relocation += addend;
13280 if (tls_type == (TLS_TLS | TLS_LD))
13282 else if (tls_type != 0)
13284 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13285 if (tls_type == (TLS_TLS | TLS_TPREL))
13286 relocation += DTP_OFFSET - TP_OFFSET;
13288 if (tls_type == (TLS_TLS | TLS_GD))
13290 bfd_put_64 (output_bfd, relocation,
13291 got->contents + off + 8);
13296 bfd_put_64 (output_bfd, relocation,
13297 got->contents + off);
13301 if (off >= (bfd_vma) -2)
13304 relocation = got->output_section->vma + got->output_offset + off;
13305 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13309 case R_PPC64_PLT16_HA:
13310 case R_PPC64_PLT16_HI:
13311 case R_PPC64_PLT16_LO:
13312 case R_PPC64_PLT32:
13313 case R_PPC64_PLT64:
13314 /* Relocation is to the entry for this symbol in the
13315 procedure linkage table. */
13317 /* Resolve a PLT reloc against a local symbol directly,
13318 without using the procedure linkage table. */
13322 /* It's possible that we didn't make a PLT entry for this
13323 symbol. This happens when statically linking PIC code,
13324 or when using -Bsymbolic. Go find a match if there is a
13326 if (htab->plt != NULL)
13328 struct plt_entry *ent;
13329 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13330 if (ent->addend == orig_rel.r_addend
13331 && ent->plt.offset != (bfd_vma) -1)
13333 relocation = (htab->plt->output_section->vma
13334 + htab->plt->output_offset
13335 + ent->plt.offset);
13336 unresolved_reloc = FALSE;
13342 /* Relocation value is TOC base. */
13343 relocation = TOCstart;
13344 if (r_symndx == STN_UNDEF)
13345 relocation += htab->stub_group[input_section->id].toc_off;
13346 else if (unresolved_reloc)
13348 else if (sec != NULL && sec->id <= htab->top_id)
13349 relocation += htab->stub_group[sec->id].toc_off;
13351 unresolved_reloc = TRUE;
13354 /* TOC16 relocs. We want the offset relative to the TOC base,
13355 which is the address of the start of the TOC plus 0x8000.
13356 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13358 case R_PPC64_TOC16:
13359 case R_PPC64_TOC16_LO:
13360 case R_PPC64_TOC16_HI:
13361 case R_PPC64_TOC16_DS:
13362 case R_PPC64_TOC16_LO_DS:
13363 case R_PPC64_TOC16_HA:
13364 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13367 /* Relocate against the beginning of the section. */
13368 case R_PPC64_SECTOFF:
13369 case R_PPC64_SECTOFF_LO:
13370 case R_PPC64_SECTOFF_HI:
13371 case R_PPC64_SECTOFF_DS:
13372 case R_PPC64_SECTOFF_LO_DS:
13373 case R_PPC64_SECTOFF_HA:
13375 addend -= sec->output_section->vma;
13378 case R_PPC64_REL16:
13379 case R_PPC64_REL16_LO:
13380 case R_PPC64_REL16_HI:
13381 case R_PPC64_REL16_HA:
13384 case R_PPC64_REL14:
13385 case R_PPC64_REL14_BRNTAKEN:
13386 case R_PPC64_REL14_BRTAKEN:
13387 case R_PPC64_REL24:
13390 case R_PPC64_TPREL16:
13391 case R_PPC64_TPREL16_LO:
13392 case R_PPC64_TPREL16_HI:
13393 case R_PPC64_TPREL16_HA:
13394 case R_PPC64_TPREL16_DS:
13395 case R_PPC64_TPREL16_LO_DS:
13396 case R_PPC64_TPREL16_HIGHER:
13397 case R_PPC64_TPREL16_HIGHERA:
13398 case R_PPC64_TPREL16_HIGHEST:
13399 case R_PPC64_TPREL16_HIGHESTA:
13401 && h->elf.root.type == bfd_link_hash_undefweak
13402 && h->elf.dynindx == -1)
13404 /* Make this relocation against an undefined weak symbol
13405 resolve to zero. This is really just a tweak, since
13406 code using weak externs ought to check that they are
13407 defined before using them. */
13408 bfd_byte *p = contents + rel->r_offset - d_offset;
13410 insn = bfd_get_32 (output_bfd, p);
13411 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13413 bfd_put_32 (output_bfd, insn, p);
13416 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13418 /* The TPREL16 relocs shouldn't really be used in shared
13419 libs as they will result in DT_TEXTREL being set, but
13420 support them anyway. */
13424 case R_PPC64_DTPREL16:
13425 case R_PPC64_DTPREL16_LO:
13426 case R_PPC64_DTPREL16_HI:
13427 case R_PPC64_DTPREL16_HA:
13428 case R_PPC64_DTPREL16_DS:
13429 case R_PPC64_DTPREL16_LO_DS:
13430 case R_PPC64_DTPREL16_HIGHER:
13431 case R_PPC64_DTPREL16_HIGHERA:
13432 case R_PPC64_DTPREL16_HIGHEST:
13433 case R_PPC64_DTPREL16_HIGHESTA:
13434 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13437 case R_PPC64_DTPMOD64:
13442 case R_PPC64_TPREL64:
13443 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13446 case R_PPC64_DTPREL64:
13447 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13450 /* Relocations that may need to be propagated if this is a
13452 case R_PPC64_REL30:
13453 case R_PPC64_REL32:
13454 case R_PPC64_REL64:
13455 case R_PPC64_ADDR14:
13456 case R_PPC64_ADDR14_BRNTAKEN:
13457 case R_PPC64_ADDR14_BRTAKEN:
13458 case R_PPC64_ADDR16:
13459 case R_PPC64_ADDR16_DS:
13460 case R_PPC64_ADDR16_HA:
13461 case R_PPC64_ADDR16_HI:
13462 case R_PPC64_ADDR16_HIGHER:
13463 case R_PPC64_ADDR16_HIGHERA:
13464 case R_PPC64_ADDR16_HIGHEST:
13465 case R_PPC64_ADDR16_HIGHESTA:
13466 case R_PPC64_ADDR16_LO:
13467 case R_PPC64_ADDR16_LO_DS:
13468 case R_PPC64_ADDR24:
13469 case R_PPC64_ADDR32:
13470 case R_PPC64_ADDR64:
13471 case R_PPC64_UADDR16:
13472 case R_PPC64_UADDR32:
13473 case R_PPC64_UADDR64:
13475 if ((input_section->flags & SEC_ALLOC) == 0)
13478 if (NO_OPD_RELOCS && is_opd)
13483 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13484 || h->elf.root.type != bfd_link_hash_undefweak)
13485 && (must_be_dyn_reloc (info, r_type)
13486 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13487 || (ELIMINATE_COPY_RELOCS
13490 && h->elf.dynindx != -1
13491 && !h->elf.non_got_ref
13492 && !h->elf.def_regular)
13495 ? h->elf.type == STT_GNU_IFUNC
13496 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13498 bfd_boolean skip, relocate;
13502 /* When generating a dynamic object, these relocations
13503 are copied into the output file to be resolved at run
13509 out_off = _bfd_elf_section_offset (output_bfd, info,
13510 input_section, rel->r_offset);
13511 if (out_off == (bfd_vma) -1)
13513 else if (out_off == (bfd_vma) -2)
13514 skip = TRUE, relocate = TRUE;
13515 out_off += (input_section->output_section->vma
13516 + input_section->output_offset);
13517 outrel.r_offset = out_off;
13518 outrel.r_addend = rel->r_addend;
13520 /* Optimize unaligned reloc use. */
13521 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13522 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13523 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13524 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13525 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13526 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13527 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13528 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13529 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13532 memset (&outrel, 0, sizeof outrel);
13533 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13535 && r_type != R_PPC64_TOC)
13537 BFD_ASSERT (h->elf.dynindx != -1);
13538 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13542 /* This symbol is local, or marked to become local,
13543 or this is an opd section reloc which must point
13544 at a local function. */
13545 outrel.r_addend += relocation;
13546 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13548 if (is_opd && h != NULL)
13550 /* Lie about opd entries. This case occurs
13551 when building shared libraries and we
13552 reference a function in another shared
13553 lib. The same thing happens for a weak
13554 definition in an application that's
13555 overridden by a strong definition in a
13556 shared lib. (I believe this is a generic
13557 bug in binutils handling of weak syms.)
13558 In these cases we won't use the opd
13559 entry in this lib. */
13560 unresolved_reloc = FALSE;
13563 && r_type == R_PPC64_ADDR64
13565 ? h->elf.type == STT_GNU_IFUNC
13566 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13567 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13570 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13572 /* We need to relocate .opd contents for ld.so.
13573 Prelink also wants simple and consistent rules
13574 for relocs. This make all RELATIVE relocs have
13575 *r_offset equal to r_addend. */
13584 ? h->elf.type == STT_GNU_IFUNC
13585 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13587 info->callbacks->einfo
13588 (_("%P: %H: %s for indirect "
13589 "function `%T' unsupported\n"),
13590 input_bfd, input_section, rel->r_offset,
13591 ppc64_elf_howto_table[r_type]->name,
13595 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13597 else if (sec == NULL || sec->owner == NULL)
13599 bfd_set_error (bfd_error_bad_value);
13606 osec = sec->output_section;
13607 indx = elf_section_data (osec)->dynindx;
13611 if ((osec->flags & SEC_READONLY) == 0
13612 && htab->elf.data_index_section != NULL)
13613 osec = htab->elf.data_index_section;
13615 osec = htab->elf.text_index_section;
13616 indx = elf_section_data (osec)->dynindx;
13618 BFD_ASSERT (indx != 0);
13620 /* We are turning this relocation into one
13621 against a section symbol, so subtract out
13622 the output section's address but not the
13623 offset of the input section in the output
13625 outrel.r_addend -= osec->vma;
13628 outrel.r_info = ELF64_R_INFO (indx, r_type);
13632 sreloc = elf_section_data (input_section)->sreloc;
13633 if (!htab->elf.dynamic_sections_created)
13634 sreloc = htab->reliplt;
13635 if (sreloc == NULL)
13638 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13641 loc = sreloc->contents;
13642 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13643 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13645 /* If this reloc is against an external symbol, it will
13646 be computed at runtime, so there's no need to do
13647 anything now. However, for the sake of prelink ensure
13648 that the section contents are a known value. */
13651 unresolved_reloc = FALSE;
13652 /* The value chosen here is quite arbitrary as ld.so
13653 ignores section contents except for the special
13654 case of .opd where the contents might be accessed
13655 before relocation. Choose zero, as that won't
13656 cause reloc overflow. */
13659 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13660 to improve backward compatibility with older
13662 if (r_type == R_PPC64_ADDR64)
13663 addend = outrel.r_addend;
13664 /* Adjust pc_relative relocs to have zero in *r_offset. */
13665 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13666 addend = (input_section->output_section->vma
13667 + input_section->output_offset
13674 case R_PPC64_GLOB_DAT:
13675 case R_PPC64_JMP_SLOT:
13676 case R_PPC64_JMP_IREL:
13677 case R_PPC64_RELATIVE:
13678 /* We shouldn't ever see these dynamic relocs in relocatable
13680 /* Fall through. */
13682 case R_PPC64_PLTGOT16:
13683 case R_PPC64_PLTGOT16_DS:
13684 case R_PPC64_PLTGOT16_HA:
13685 case R_PPC64_PLTGOT16_HI:
13686 case R_PPC64_PLTGOT16_LO:
13687 case R_PPC64_PLTGOT16_LO_DS:
13688 case R_PPC64_PLTREL32:
13689 case R_PPC64_PLTREL64:
13690 /* These ones haven't been implemented yet. */
13692 info->callbacks->einfo
13693 (_("%P: %B: %s is not supported for `%T'\n"),
13695 ppc64_elf_howto_table[r_type]->name, sym_name);
13697 bfd_set_error (bfd_error_invalid_operation);
13702 /* Multi-instruction sequences that access the TOC can be
13703 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13704 to nop; addi rb,r2,x; */
13710 case R_PPC64_GOT_TLSLD16_HI:
13711 case R_PPC64_GOT_TLSGD16_HI:
13712 case R_PPC64_GOT_TPREL16_HI:
13713 case R_PPC64_GOT_DTPREL16_HI:
13714 case R_PPC64_GOT16_HI:
13715 case R_PPC64_TOC16_HI:
13716 /* These relocs would only be useful if building up an
13717 offset to later add to r2, perhaps in an indexed
13718 addressing mode instruction. Don't try to optimize.
13719 Unfortunately, the possibility of someone building up an
13720 offset like this or even with the HA relocs, means that
13721 we need to check the high insn when optimizing the low
13725 case R_PPC64_GOT_TLSLD16_HA:
13726 case R_PPC64_GOT_TLSGD16_HA:
13727 case R_PPC64_GOT_TPREL16_HA:
13728 case R_PPC64_GOT_DTPREL16_HA:
13729 case R_PPC64_GOT16_HA:
13730 case R_PPC64_TOC16_HA:
13731 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13732 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13734 bfd_byte *p = contents + (rel->r_offset & ~3);
13735 bfd_put_32 (input_bfd, NOP, p);
13739 case R_PPC64_GOT_TLSLD16_LO:
13740 case R_PPC64_GOT_TLSGD16_LO:
13741 case R_PPC64_GOT_TPREL16_LO_DS:
13742 case R_PPC64_GOT_DTPREL16_LO_DS:
13743 case R_PPC64_GOT16_LO:
13744 case R_PPC64_GOT16_LO_DS:
13745 case R_PPC64_TOC16_LO:
13746 case R_PPC64_TOC16_LO_DS:
13747 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13748 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13750 bfd_byte *p = contents + (rel->r_offset & ~3);
13751 insn = bfd_get_32 (input_bfd, p);
13752 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13754 /* Transform addic to addi when we change reg. */
13755 insn &= ~((0x3f << 26) | (0x1f << 16));
13756 insn |= (14u << 26) | (2 << 16);
13760 insn &= ~(0x1f << 16);
13763 bfd_put_32 (input_bfd, insn, p);
13768 /* Do any further special processing. */
13774 case R_PPC64_ADDR16_HA:
13775 case R_PPC64_REL16_HA:
13776 case R_PPC64_ADDR16_HIGHERA:
13777 case R_PPC64_ADDR16_HIGHESTA:
13778 case R_PPC64_TOC16_HA:
13779 case R_PPC64_SECTOFF_HA:
13780 case R_PPC64_TPREL16_HA:
13781 case R_PPC64_DTPREL16_HA:
13782 case R_PPC64_TPREL16_HIGHER:
13783 case R_PPC64_TPREL16_HIGHERA:
13784 case R_PPC64_TPREL16_HIGHEST:
13785 case R_PPC64_TPREL16_HIGHESTA:
13786 case R_PPC64_DTPREL16_HIGHER:
13787 case R_PPC64_DTPREL16_HIGHERA:
13788 case R_PPC64_DTPREL16_HIGHEST:
13789 case R_PPC64_DTPREL16_HIGHESTA:
13790 /* It's just possible that this symbol is a weak symbol
13791 that's not actually defined anywhere. In that case,
13792 'sec' would be NULL, and we should leave the symbol
13793 alone (it will be set to zero elsewhere in the link). */
13798 case R_PPC64_GOT16_HA:
13799 case R_PPC64_PLTGOT16_HA:
13800 case R_PPC64_PLT16_HA:
13801 case R_PPC64_GOT_TLSGD16_HA:
13802 case R_PPC64_GOT_TLSLD16_HA:
13803 case R_PPC64_GOT_TPREL16_HA:
13804 case R_PPC64_GOT_DTPREL16_HA:
13805 /* Add 0x10000 if sign bit in 0:15 is set.
13806 Bits 0:15 are not used. */
13810 case R_PPC64_ADDR16_DS:
13811 case R_PPC64_ADDR16_LO_DS:
13812 case R_PPC64_GOT16_DS:
13813 case R_PPC64_GOT16_LO_DS:
13814 case R_PPC64_PLT16_LO_DS:
13815 case R_PPC64_SECTOFF_DS:
13816 case R_PPC64_SECTOFF_LO_DS:
13817 case R_PPC64_TOC16_DS:
13818 case R_PPC64_TOC16_LO_DS:
13819 case R_PPC64_PLTGOT16_DS:
13820 case R_PPC64_PLTGOT16_LO_DS:
13821 case R_PPC64_GOT_TPREL16_DS:
13822 case R_PPC64_GOT_TPREL16_LO_DS:
13823 case R_PPC64_GOT_DTPREL16_DS:
13824 case R_PPC64_GOT_DTPREL16_LO_DS:
13825 case R_PPC64_TPREL16_DS:
13826 case R_PPC64_TPREL16_LO_DS:
13827 case R_PPC64_DTPREL16_DS:
13828 case R_PPC64_DTPREL16_LO_DS:
13829 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13831 /* If this reloc is against an lq insn, then the value must be
13832 a multiple of 16. This is somewhat of a hack, but the
13833 "correct" way to do this by defining _DQ forms of all the
13834 _DS relocs bloats all reloc switches in this file. It
13835 doesn't seem to make much sense to use any of these relocs
13836 in data, so testing the insn should be safe. */
13837 if ((insn & (0x3f << 26)) == (56u << 26))
13839 if (((relocation + addend) & mask) != 0)
13841 info->callbacks->einfo
13842 (_("%P: %H: error: %s not a multiple of %u\n"),
13843 input_bfd, input_section, rel->r_offset,
13844 ppc64_elf_howto_table[r_type]->name,
13846 bfd_set_error (bfd_error_bad_value);
13853 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13854 because such sections are not SEC_ALLOC and thus ld.so will
13855 not process them. */
13856 if (unresolved_reloc
13857 && !((input_section->flags & SEC_DEBUGGING) != 0
13858 && h->elf.def_dynamic)
13859 && _bfd_elf_section_offset (output_bfd, info, input_section,
13860 rel->r_offset) != (bfd_vma) -1)
13862 info->callbacks->einfo
13863 (_("%P: %H: unresolvable %s against `%T'\n"),
13864 input_bfd, input_section, rel->r_offset,
13865 ppc64_elf_howto_table[(int) r_type]->name,
13866 h->elf.root.root.string);
13870 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13878 if (r != bfd_reloc_ok)
13880 char *more_info = NULL;
13881 const char *reloc_name = ppc64_elf_howto_table[r_type]->name;
13883 if (reloc_dest != DEST_NORMAL)
13885 more_info = bfd_malloc (strlen (reloc_name) + 8);
13886 if (more_info != NULL)
13888 strcpy (more_info, reloc_name);
13889 strcat (more_info, (reloc_dest == DEST_OPD
13890 ? " (OPD)" : " (stub)"));
13891 reloc_name = more_info;
13895 if (r == bfd_reloc_overflow)
13900 && h->elf.root.type == bfd_link_hash_undefweak
13901 && ppc64_elf_howto_table[r_type]->pc_relative)
13903 /* Assume this is a call protected by other code that
13904 detects the symbol is undefined. If this is the case,
13905 we can safely ignore the overflow. If not, the
13906 program is hosed anyway, and a little warning isn't
13912 if (!((*info->callbacks->reloc_overflow)
13913 (info, &h->elf.root, sym_name,
13914 reloc_name, orig_rel.r_addend,
13915 input_bfd, input_section, rel->r_offset)))
13920 info->callbacks->einfo
13921 (_("%P: %H: %s against `%T': error %d\n"),
13922 input_bfd, input_section, rel->r_offset,
13923 reloc_name, sym_name, (int) r);
13926 if (more_info != NULL)
13931 /* If we're emitting relocations, then shortly after this function
13932 returns, reloc offsets and addends for this section will be
13933 adjusted. Worse, reloc symbol indices will be for the output
13934 file rather than the input. Save a copy of the relocs for
13935 opd_entry_value. */
13936 if (is_opd && (info->emitrelocations || info->relocatable))
13939 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13940 rel = bfd_alloc (input_bfd, amt);
13941 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13942 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13945 memcpy (rel, relocs, amt);
13950 /* Adjust the value of any local symbols in opd sections. */
13953 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13954 const char *name ATTRIBUTE_UNUSED,
13955 Elf_Internal_Sym *elfsym,
13956 asection *input_sec,
13957 struct elf_link_hash_entry *h)
13959 struct _opd_sec_data *opd;
13966 opd = get_opd_info (input_sec);
13967 if (opd == NULL || opd->adjust == NULL)
13970 value = elfsym->st_value - input_sec->output_offset;
13971 if (!info->relocatable)
13972 value -= input_sec->output_section->vma;
13974 adjust = opd->adjust[value / 8];
13978 elfsym->st_value += adjust;
13982 /* Finish up dynamic symbol handling. We set the contents of various
13983 dynamic sections here. */
13986 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13987 struct bfd_link_info *info,
13988 struct elf_link_hash_entry *h,
13989 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
13991 struct ppc_link_hash_table *htab;
13992 struct plt_entry *ent;
13993 Elf_Internal_Rela rela;
13996 htab = ppc_hash_table (info);
14000 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14001 if (ent->plt.offset != (bfd_vma) -1)
14003 /* This symbol has an entry in the procedure linkage
14004 table. Set it up. */
14005 if (!htab->elf.dynamic_sections_created
14006 || h->dynindx == -1)
14008 BFD_ASSERT (h->type == STT_GNU_IFUNC
14010 && (h->root.type == bfd_link_hash_defined
14011 || h->root.type == bfd_link_hash_defweak));
14012 rela.r_offset = (htab->iplt->output_section->vma
14013 + htab->iplt->output_offset
14014 + ent->plt.offset);
14015 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14016 rela.r_addend = (h->root.u.def.value
14017 + h->root.u.def.section->output_offset
14018 + h->root.u.def.section->output_section->vma
14020 loc = (htab->reliplt->contents
14021 + (htab->reliplt->reloc_count++
14022 * sizeof (Elf64_External_Rela)));
14026 rela.r_offset = (htab->plt->output_section->vma
14027 + htab->plt->output_offset
14028 + ent->plt.offset);
14029 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14030 rela.r_addend = ent->addend;
14031 loc = (htab->relplt->contents
14032 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
14033 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
14035 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14040 /* This symbol needs a copy reloc. Set it up. */
14042 if (h->dynindx == -1
14043 || (h->root.type != bfd_link_hash_defined
14044 && h->root.type != bfd_link_hash_defweak)
14045 || htab->relbss == NULL)
14048 rela.r_offset = (h->root.u.def.value
14049 + h->root.u.def.section->output_section->vma
14050 + h->root.u.def.section->output_offset);
14051 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14053 loc = htab->relbss->contents;
14054 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14055 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14061 /* Used to decide how to sort relocs in an optimal manner for the
14062 dynamic linker, before writing them out. */
14064 static enum elf_reloc_type_class
14065 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
14067 enum elf_ppc64_reloc_type r_type;
14069 r_type = ELF64_R_TYPE (rela->r_info);
14072 case R_PPC64_RELATIVE:
14073 return reloc_class_relative;
14074 case R_PPC64_JMP_SLOT:
14075 return reloc_class_plt;
14077 return reloc_class_copy;
14079 return reloc_class_normal;
14083 /* Finish up the dynamic sections. */
14086 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14087 struct bfd_link_info *info)
14089 struct ppc_link_hash_table *htab;
14093 htab = ppc_hash_table (info);
14097 dynobj = htab->elf.dynobj;
14098 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14100 if (htab->elf.dynamic_sections_created)
14102 Elf64_External_Dyn *dyncon, *dynconend;
14104 if (sdyn == NULL || htab->got == NULL)
14107 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14108 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14109 for (; dyncon < dynconend; dyncon++)
14111 Elf_Internal_Dyn dyn;
14114 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14121 case DT_PPC64_GLINK:
14123 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14124 /* We stupidly defined DT_PPC64_GLINK to be the start
14125 of glink rather than the first entry point, which is
14126 what ld.so needs, and now have a bigger stub to
14127 support automatic multiple TOCs. */
14128 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
14132 s = bfd_get_section_by_name (output_bfd, ".opd");
14135 dyn.d_un.d_ptr = s->vma;
14138 case DT_PPC64_OPDSZ:
14139 s = bfd_get_section_by_name (output_bfd, ".opd");
14142 dyn.d_un.d_val = s->size;
14147 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14152 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14156 dyn.d_un.d_val = htab->relplt->size;
14160 /* Don't count procedure linkage table relocs in the
14161 overall reloc count. */
14165 dyn.d_un.d_val -= s->size;
14169 /* We may not be using the standard ELF linker script.
14170 If .rela.plt is the first .rela section, we adjust
14171 DT_RELA to not include it. */
14175 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14177 dyn.d_un.d_ptr += s->size;
14181 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14185 if (htab->got != NULL && htab->got->size != 0)
14187 /* Fill in the first entry in the global offset table.
14188 We use it to hold the link-time TOCbase. */
14189 bfd_put_64 (output_bfd,
14190 elf_gp (output_bfd) + TOC_BASE_OFF,
14191 htab->got->contents);
14193 /* Set .got entry size. */
14194 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14197 if (htab->plt != NULL && htab->plt->size != 0)
14199 /* Set .plt entry size. */
14200 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14204 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14205 brlt ourselves if emitrelocations. */
14206 if (htab->brlt != NULL
14207 && htab->brlt->reloc_count != 0
14208 && !_bfd_elf_link_output_relocs (output_bfd,
14210 elf_section_data (htab->brlt)->rela.hdr,
14211 elf_section_data (htab->brlt)->relocs,
14215 if (htab->glink != NULL
14216 && htab->glink->reloc_count != 0
14217 && !_bfd_elf_link_output_relocs (output_bfd,
14219 elf_section_data (htab->glink)->rela.hdr,
14220 elf_section_data (htab->glink)->relocs,
14225 if (htab->glink_eh_frame != NULL
14226 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
14227 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14228 htab->glink_eh_frame,
14229 htab->glink_eh_frame->contents))
14232 /* We need to handle writing out multiple GOT sections ourselves,
14233 since we didn't add them to DYNOBJ. We know dynobj is the first
14235 while ((dynobj = dynobj->link_next) != NULL)
14239 if (!is_ppc64_elf (dynobj))
14242 s = ppc64_elf_tdata (dynobj)->got;
14245 && s->output_section != bfd_abs_section_ptr
14246 && !bfd_set_section_contents (output_bfd, s->output_section,
14247 s->contents, s->output_offset,
14250 s = ppc64_elf_tdata (dynobj)->relgot;
14253 && s->output_section != bfd_abs_section_ptr
14254 && !bfd_set_section_contents (output_bfd, s->output_section,
14255 s->contents, s->output_offset,
14263 #include "elf64-target.h"
14265 /* FreeBSD support */
14267 #undef TARGET_LITTLE_SYM
14268 #undef TARGET_LITTLE_NAME
14270 #undef TARGET_BIG_SYM
14271 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14272 #undef TARGET_BIG_NAME
14273 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14276 #define ELF_OSABI ELFOSABI_FREEBSD
14279 #define elf64_bed elf64_powerpc_fbsd_bed
14281 #include "elf64-target.h"