1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
8 This file is part of BFD, the Binary File Descriptor library.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
60 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61 #define TARGET_LITTLE_NAME "elf64-powerpcle"
62 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63 #define TARGET_BIG_NAME "elf64-powerpc"
64 #define ELF_ARCH bfd_arch_powerpc
65 #define ELF_TARGET_ID PPC64_ELF_DATA
66 #define ELF_MACHINE_CODE EM_PPC64
67 #define ELF_MAXPAGESIZE 0x10000
68 #define ELF_COMMONPAGESIZE 0x1000
69 #define elf_info_to_howto ppc64_elf_info_to_howto
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_default_execstack 0
81 #define bfd_elf64_mkobject ppc64_elf_mkobject
82 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
89 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define elf_backend_object_p ppc64_elf_object_p
92 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
93 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
94 #define elf_backend_write_core_note ppc64_elf_write_core_note
95 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
96 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
97 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
98 #define elf_backend_check_directives ppc64_elf_process_dot_syms
99 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
100 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
101 #define elf_backend_check_relocs ppc64_elf_check_relocs
102 #define elf_backend_gc_keep ppc64_elf_gc_keep
103 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
104 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
105 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
106 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
107 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
108 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
109 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
110 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_post_process_headers _bfd_elf_set_osabi
121 /* The name of the dynamic interpreter. This is put in the .interp
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE 24
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
131 /* TOC base pointers offset from start of TOC. */
132 #define TOC_BASE_OFF 0x8000
134 /* Offset of tp and dtp pointers from start of TLS block. */
135 #define TP_OFFSET 0x7000
136 #define DTP_OFFSET 0x8000
138 /* .plt call stub instructions. The normal stub is like this, but
139 sometimes the .plt entry crosses a 64k boundary and we need to
140 insert an addi to adjust r12. */
141 #define PLT_CALL_STUB_SIZE (7*4)
142 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
143 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
144 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
145 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
146 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
147 /* ld %r11,xxx+16@l(%r12) */
148 #define BCTR 0x4e800420 /* bctr */
151 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
152 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
153 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
154 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
156 #define XOR_R11_R11_R11 0x7d6b5a78 /* xor %r11,%r11,%r11 */
157 #define ADD_R12_R12_R11 0x7d8c5a14 /* add %r12,%r12,%r11 */
158 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
159 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
160 #define BNECTR 0x4ca20420 /* bnectr+ */
161 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
163 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
164 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
166 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
168 /* glink call stub instructions. We enter with the index in R0. */
169 #define GLINK_CALL_STUB_SIZE (16*4)
173 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
174 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
176 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
177 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
178 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
179 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
187 #define NOP 0x60000000
189 /* Some other nops. */
190 #define CROR_151515 0x4def7b82
191 #define CROR_313131 0x4ffffb82
193 /* .glink entries for the first 32k functions are two instructions. */
194 #define LI_R0_0 0x38000000 /* li %r0,0 */
195 #define B_DOT 0x48000000 /* b . */
197 /* After that, we need two instructions to load the index, followed by
199 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
200 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
202 /* Instructions used by the save and restore reg functions. */
203 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
204 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
205 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
206 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
207 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
208 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
209 #define LI_R12_0 0x39800000 /* li %r12,0 */
210 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
211 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
212 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
213 #define BLR 0x4e800020 /* blr */
215 /* Since .opd is an array of descriptors and each entry will end up
216 with identical R_PPC64_RELATIVE relocs, there is really no need to
217 propagate .opd relocs; The dynamic linker should be taught to
218 relocate .opd without reloc entries. */
219 #ifndef NO_OPD_RELOCS
220 #define NO_OPD_RELOCS 0
223 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
225 /* Relocation HOWTO's. */
226 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
228 static reloc_howto_type ppc64_elf_howto_raw[] = {
229 /* This reloc does nothing. */
230 HOWTO (R_PPC64_NONE, /* type */
232 2, /* size (0 = byte, 1 = short, 2 = long) */
234 FALSE, /* pc_relative */
236 complain_overflow_dont, /* complain_on_overflow */
237 bfd_elf_generic_reloc, /* special_function */
238 "R_PPC64_NONE", /* name */
239 FALSE, /* partial_inplace */
242 FALSE), /* pcrel_offset */
244 /* A standard 32 bit relocation. */
245 HOWTO (R_PPC64_ADDR32, /* type */
247 2, /* size (0 = byte, 1 = short, 2 = long) */
249 FALSE, /* pc_relative */
251 complain_overflow_bitfield, /* complain_on_overflow */
252 bfd_elf_generic_reloc, /* special_function */
253 "R_PPC64_ADDR32", /* name */
254 FALSE, /* partial_inplace */
256 0xffffffff, /* dst_mask */
257 FALSE), /* pcrel_offset */
259 /* An absolute 26 bit branch; the lower two bits must be zero.
260 FIXME: we don't check that, we just clear them. */
261 HOWTO (R_PPC64_ADDR24, /* type */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
265 FALSE, /* pc_relative */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_PPC64_ADDR24", /* name */
270 FALSE, /* partial_inplace */
272 0x03fffffc, /* dst_mask */
273 FALSE), /* pcrel_offset */
275 /* A standard 16 bit relocation. */
276 HOWTO (R_PPC64_ADDR16, /* type */
278 1, /* size (0 = byte, 1 = short, 2 = long) */
280 FALSE, /* pc_relative */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_PPC64_ADDR16", /* name */
285 FALSE, /* partial_inplace */
287 0xffff, /* dst_mask */
288 FALSE), /* pcrel_offset */
290 /* A 16 bit relocation without overflow. */
291 HOWTO (R_PPC64_ADDR16_LO, /* type */
293 1, /* size (0 = byte, 1 = short, 2 = long) */
295 FALSE, /* pc_relative */
297 complain_overflow_dont,/* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_PPC64_ADDR16_LO", /* name */
300 FALSE, /* partial_inplace */
302 0xffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
305 /* Bits 16-31 of an address. */
306 HOWTO (R_PPC64_ADDR16_HI, /* type */
308 1, /* size (0 = byte, 1 = short, 2 = long) */
310 FALSE, /* pc_relative */
312 complain_overflow_dont, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_PPC64_ADDR16_HI", /* name */
315 FALSE, /* partial_inplace */
317 0xffff, /* dst_mask */
318 FALSE), /* pcrel_offset */
320 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
321 bits, treated as a signed number, is negative. */
322 HOWTO (R_PPC64_ADDR16_HA, /* type */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
326 FALSE, /* pc_relative */
328 complain_overflow_dont, /* complain_on_overflow */
329 ppc64_elf_ha_reloc, /* special_function */
330 "R_PPC64_ADDR16_HA", /* name */
331 FALSE, /* partial_inplace */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
336 /* An absolute 16 bit branch; the lower two bits must be zero.
337 FIXME: we don't check that, we just clear them. */
338 HOWTO (R_PPC64_ADDR14, /* type */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
342 FALSE, /* pc_relative */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 ppc64_elf_branch_reloc, /* special_function */
346 "R_PPC64_ADDR14", /* name */
347 FALSE, /* partial_inplace */
349 0x0000fffc, /* dst_mask */
350 FALSE), /* pcrel_offset */
352 /* An absolute 16 bit branch, for which bit 10 should be set to
353 indicate that the branch is expected to be taken. The lower two
354 bits must be zero. */
355 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
357 2, /* size (0 = byte, 1 = short, 2 = long) */
359 FALSE, /* pc_relative */
361 complain_overflow_bitfield, /* complain_on_overflow */
362 ppc64_elf_brtaken_reloc, /* special_function */
363 "R_PPC64_ADDR14_BRTAKEN",/* name */
364 FALSE, /* partial_inplace */
366 0x0000fffc, /* dst_mask */
367 FALSE), /* pcrel_offset */
369 /* An absolute 16 bit branch, for which bit 10 should be set to
370 indicate that the branch is not expected to be taken. The lower
371 two bits must be zero. */
372 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
376 FALSE, /* pc_relative */
378 complain_overflow_bitfield, /* complain_on_overflow */
379 ppc64_elf_brtaken_reloc, /* special_function */
380 "R_PPC64_ADDR14_BRNTAKEN",/* name */
381 FALSE, /* partial_inplace */
383 0x0000fffc, /* dst_mask */
384 FALSE), /* pcrel_offset */
386 /* A relative 26 bit branch; the lower two bits must be zero. */
387 HOWTO (R_PPC64_REL24, /* type */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
391 TRUE, /* pc_relative */
393 complain_overflow_signed, /* complain_on_overflow */
394 ppc64_elf_branch_reloc, /* special_function */
395 "R_PPC64_REL24", /* name */
396 FALSE, /* partial_inplace */
398 0x03fffffc, /* dst_mask */
399 TRUE), /* pcrel_offset */
401 /* A relative 16 bit branch; the lower two bits must be zero. */
402 HOWTO (R_PPC64_REL14, /* type */
404 2, /* size (0 = byte, 1 = short, 2 = long) */
406 TRUE, /* pc_relative */
408 complain_overflow_signed, /* complain_on_overflow */
409 ppc64_elf_branch_reloc, /* special_function */
410 "R_PPC64_REL14", /* name */
411 FALSE, /* partial_inplace */
413 0x0000fffc, /* dst_mask */
414 TRUE), /* pcrel_offset */
416 /* A relative 16 bit branch. Bit 10 should be set to indicate that
417 the branch is expected to be taken. The lower two bits must be
419 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
423 TRUE, /* pc_relative */
425 complain_overflow_signed, /* complain_on_overflow */
426 ppc64_elf_brtaken_reloc, /* special_function */
427 "R_PPC64_REL14_BRTAKEN", /* name */
428 FALSE, /* partial_inplace */
430 0x0000fffc, /* dst_mask */
431 TRUE), /* pcrel_offset */
433 /* A relative 16 bit branch. Bit 10 should be set to indicate that
434 the branch is not expected to be taken. The lower two bits must
436 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 TRUE, /* pc_relative */
442 complain_overflow_signed, /* complain_on_overflow */
443 ppc64_elf_brtaken_reloc, /* special_function */
444 "R_PPC64_REL14_BRNTAKEN",/* name */
445 FALSE, /* partial_inplace */
447 0x0000fffc, /* dst_mask */
448 TRUE), /* pcrel_offset */
450 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
452 HOWTO (R_PPC64_GOT16, /* type */
454 1, /* size (0 = byte, 1 = short, 2 = long) */
456 FALSE, /* pc_relative */
458 complain_overflow_signed, /* complain_on_overflow */
459 ppc64_elf_unhandled_reloc, /* special_function */
460 "R_PPC64_GOT16", /* name */
461 FALSE, /* partial_inplace */
463 0xffff, /* dst_mask */
464 FALSE), /* pcrel_offset */
466 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
468 HOWTO (R_PPC64_GOT16_LO, /* type */
470 1, /* size (0 = byte, 1 = short, 2 = long) */
472 FALSE, /* pc_relative */
474 complain_overflow_dont, /* complain_on_overflow */
475 ppc64_elf_unhandled_reloc, /* special_function */
476 "R_PPC64_GOT16_LO", /* name */
477 FALSE, /* partial_inplace */
479 0xffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
482 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
484 HOWTO (R_PPC64_GOT16_HI, /* type */
486 1, /* size (0 = byte, 1 = short, 2 = long) */
488 FALSE, /* pc_relative */
490 complain_overflow_dont,/* complain_on_overflow */
491 ppc64_elf_unhandled_reloc, /* special_function */
492 "R_PPC64_GOT16_HI", /* name */
493 FALSE, /* partial_inplace */
495 0xffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
498 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
500 HOWTO (R_PPC64_GOT16_HA, /* type */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
504 FALSE, /* pc_relative */
506 complain_overflow_dont,/* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16_HA", /* name */
509 FALSE, /* partial_inplace */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
514 /* This is used only by the dynamic linker. The symbol should exist
515 both in the object being run and in some shared library. The
516 dynamic linker copies the data addressed by the symbol from the
517 shared library into the object, because the object being
518 run has to have the data at some particular address. */
519 HOWTO (R_PPC64_COPY, /* type */
521 0, /* this one is variable size */
523 FALSE, /* pc_relative */
525 complain_overflow_dont, /* complain_on_overflow */
526 ppc64_elf_unhandled_reloc, /* special_function */
527 "R_PPC64_COPY", /* name */
528 FALSE, /* partial_inplace */
531 FALSE), /* pcrel_offset */
533 /* Like R_PPC64_ADDR64, but used when setting global offset table
535 HOWTO (R_PPC64_GLOB_DAT, /* type */
537 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
539 FALSE, /* pc_relative */
541 complain_overflow_dont, /* complain_on_overflow */
542 ppc64_elf_unhandled_reloc, /* special_function */
543 "R_PPC64_GLOB_DAT", /* name */
544 FALSE, /* partial_inplace */
546 ONES (64), /* dst_mask */
547 FALSE), /* pcrel_offset */
549 /* Created by the link editor. Marks a procedure linkage table
550 entry for a symbol. */
551 HOWTO (R_PPC64_JMP_SLOT, /* type */
553 0, /* size (0 = byte, 1 = short, 2 = long) */
555 FALSE, /* pc_relative */
557 complain_overflow_dont, /* complain_on_overflow */
558 ppc64_elf_unhandled_reloc, /* special_function */
559 "R_PPC64_JMP_SLOT", /* name */
560 FALSE, /* partial_inplace */
563 FALSE), /* pcrel_offset */
565 /* Used only by the dynamic linker. When the object is run, this
566 doubleword64 is set to the load address of the object, plus the
568 HOWTO (R_PPC64_RELATIVE, /* type */
570 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
572 FALSE, /* pc_relative */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_PPC64_RELATIVE", /* name */
577 FALSE, /* partial_inplace */
579 ONES (64), /* dst_mask */
580 FALSE), /* pcrel_offset */
582 /* Like R_PPC64_ADDR32, but may be unaligned. */
583 HOWTO (R_PPC64_UADDR32, /* type */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
587 FALSE, /* pc_relative */
589 complain_overflow_bitfield, /* complain_on_overflow */
590 bfd_elf_generic_reloc, /* special_function */
591 "R_PPC64_UADDR32", /* name */
592 FALSE, /* partial_inplace */
594 0xffffffff, /* dst_mask */
595 FALSE), /* pcrel_offset */
597 /* Like R_PPC64_ADDR16, but may be unaligned. */
598 HOWTO (R_PPC64_UADDR16, /* type */
600 1, /* size (0 = byte, 1 = short, 2 = long) */
602 FALSE, /* pc_relative */
604 complain_overflow_bitfield, /* complain_on_overflow */
605 bfd_elf_generic_reloc, /* special_function */
606 "R_PPC64_UADDR16", /* name */
607 FALSE, /* partial_inplace */
609 0xffff, /* dst_mask */
610 FALSE), /* pcrel_offset */
612 /* 32-bit PC relative. */
613 HOWTO (R_PPC64_REL32, /* type */
615 2, /* size (0 = byte, 1 = short, 2 = long) */
617 TRUE, /* pc_relative */
619 /* FIXME: Verify. Was complain_overflow_bitfield. */
620 complain_overflow_signed, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 "R_PPC64_REL32", /* name */
623 FALSE, /* partial_inplace */
625 0xffffffff, /* dst_mask */
626 TRUE), /* pcrel_offset */
628 /* 32-bit relocation to the symbol's procedure linkage table. */
629 HOWTO (R_PPC64_PLT32, /* type */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
633 FALSE, /* pc_relative */
635 complain_overflow_bitfield, /* complain_on_overflow */
636 ppc64_elf_unhandled_reloc, /* special_function */
637 "R_PPC64_PLT32", /* name */
638 FALSE, /* partial_inplace */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
643 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
644 FIXME: R_PPC64_PLTREL32 not supported. */
645 HOWTO (R_PPC64_PLTREL32, /* type */
647 2, /* size (0 = byte, 1 = short, 2 = long) */
649 TRUE, /* pc_relative */
651 complain_overflow_signed, /* complain_on_overflow */
652 bfd_elf_generic_reloc, /* special_function */
653 "R_PPC64_PLTREL32", /* name */
654 FALSE, /* partial_inplace */
656 0xffffffff, /* dst_mask */
657 TRUE), /* pcrel_offset */
659 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
661 HOWTO (R_PPC64_PLT16_LO, /* type */
663 1, /* size (0 = byte, 1 = short, 2 = long) */
665 FALSE, /* pc_relative */
667 complain_overflow_dont, /* complain_on_overflow */
668 ppc64_elf_unhandled_reloc, /* special_function */
669 "R_PPC64_PLT16_LO", /* name */
670 FALSE, /* partial_inplace */
672 0xffff, /* dst_mask */
673 FALSE), /* pcrel_offset */
675 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
677 HOWTO (R_PPC64_PLT16_HI, /* type */
679 1, /* size (0 = byte, 1 = short, 2 = long) */
681 FALSE, /* pc_relative */
683 complain_overflow_dont, /* complain_on_overflow */
684 ppc64_elf_unhandled_reloc, /* special_function */
685 "R_PPC64_PLT16_HI", /* name */
686 FALSE, /* partial_inplace */
688 0xffff, /* dst_mask */
689 FALSE), /* pcrel_offset */
691 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
693 HOWTO (R_PPC64_PLT16_HA, /* type */
695 1, /* size (0 = byte, 1 = short, 2 = long) */
697 FALSE, /* pc_relative */
699 complain_overflow_dont, /* complain_on_overflow */
700 ppc64_elf_unhandled_reloc, /* special_function */
701 "R_PPC64_PLT16_HA", /* name */
702 FALSE, /* partial_inplace */
704 0xffff, /* dst_mask */
705 FALSE), /* pcrel_offset */
707 /* 16-bit section relative relocation. */
708 HOWTO (R_PPC64_SECTOFF, /* type */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
712 FALSE, /* pc_relative */
714 complain_overflow_bitfield, /* complain_on_overflow */
715 ppc64_elf_sectoff_reloc, /* special_function */
716 "R_PPC64_SECTOFF", /* name */
717 FALSE, /* partial_inplace */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
722 /* Like R_PPC64_SECTOFF, but no overflow warning. */
723 HOWTO (R_PPC64_SECTOFF_LO, /* type */
725 1, /* size (0 = byte, 1 = short, 2 = long) */
727 FALSE, /* pc_relative */
729 complain_overflow_dont, /* complain_on_overflow */
730 ppc64_elf_sectoff_reloc, /* special_function */
731 "R_PPC64_SECTOFF_LO", /* name */
732 FALSE, /* partial_inplace */
734 0xffff, /* dst_mask */
735 FALSE), /* pcrel_offset */
737 /* 16-bit upper half section relative relocation. */
738 HOWTO (R_PPC64_SECTOFF_HI, /* type */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
742 FALSE, /* pc_relative */
744 complain_overflow_dont, /* complain_on_overflow */
745 ppc64_elf_sectoff_reloc, /* special_function */
746 "R_PPC64_SECTOFF_HI", /* name */
747 FALSE, /* partial_inplace */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
752 /* 16-bit upper half adjusted section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF_HA, /* type */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
757 FALSE, /* pc_relative */
759 complain_overflow_dont, /* complain_on_overflow */
760 ppc64_elf_sectoff_ha_reloc, /* special_function */
761 "R_PPC64_SECTOFF_HA", /* name */
762 FALSE, /* partial_inplace */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
767 /* Like R_PPC64_REL24 without touching the two least significant bits. */
768 HOWTO (R_PPC64_REL30, /* type */
770 2, /* size (0 = byte, 1 = short, 2 = long) */
772 TRUE, /* pc_relative */
774 complain_overflow_dont, /* complain_on_overflow */
775 bfd_elf_generic_reloc, /* special_function */
776 "R_PPC64_REL30", /* name */
777 FALSE, /* partial_inplace */
779 0xfffffffc, /* dst_mask */
780 TRUE), /* pcrel_offset */
782 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
784 /* A standard 64-bit relocation. */
785 HOWTO (R_PPC64_ADDR64, /* type */
787 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
789 FALSE, /* pc_relative */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC64_ADDR64", /* name */
794 FALSE, /* partial_inplace */
796 ONES (64), /* dst_mask */
797 FALSE), /* pcrel_offset */
799 /* The bits 32-47 of an address. */
800 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
802 1, /* size (0 = byte, 1 = short, 2 = long) */
804 FALSE, /* pc_relative */
806 complain_overflow_dont, /* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_PPC64_ADDR16_HIGHER", /* name */
809 FALSE, /* partial_inplace */
811 0xffff, /* dst_mask */
812 FALSE), /* pcrel_offset */
814 /* The bits 32-47 of an address, plus 1 if the contents of the low
815 16 bits, treated as a signed number, is negative. */
816 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
820 FALSE, /* pc_relative */
822 complain_overflow_dont, /* complain_on_overflow */
823 ppc64_elf_ha_reloc, /* special_function */
824 "R_PPC64_ADDR16_HIGHERA", /* name */
825 FALSE, /* partial_inplace */
827 0xffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
830 /* The bits 48-63 of an address. */
831 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
835 FALSE, /* pc_relative */
837 complain_overflow_dont, /* complain_on_overflow */
838 bfd_elf_generic_reloc, /* special_function */
839 "R_PPC64_ADDR16_HIGHEST", /* name */
840 FALSE, /* partial_inplace */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
845 /* The bits 48-63 of an address, plus 1 if the contents of the low
846 16 bits, treated as a signed number, is negative. */
847 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
851 FALSE, /* pc_relative */
853 complain_overflow_dont, /* complain_on_overflow */
854 ppc64_elf_ha_reloc, /* special_function */
855 "R_PPC64_ADDR16_HIGHESTA", /* name */
856 FALSE, /* partial_inplace */
858 0xffff, /* dst_mask */
859 FALSE), /* pcrel_offset */
861 /* Like ADDR64, but may be unaligned. */
862 HOWTO (R_PPC64_UADDR64, /* type */
864 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
866 FALSE, /* pc_relative */
868 complain_overflow_dont, /* complain_on_overflow */
869 bfd_elf_generic_reloc, /* special_function */
870 "R_PPC64_UADDR64", /* name */
871 FALSE, /* partial_inplace */
873 ONES (64), /* dst_mask */
874 FALSE), /* pcrel_offset */
876 /* 64-bit relative relocation. */
877 HOWTO (R_PPC64_REL64, /* type */
879 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
881 TRUE, /* pc_relative */
883 complain_overflow_dont, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC64_REL64", /* name */
886 FALSE, /* partial_inplace */
888 ONES (64), /* dst_mask */
889 TRUE), /* pcrel_offset */
891 /* 64-bit relocation to the symbol's procedure linkage table. */
892 HOWTO (R_PPC64_PLT64, /* type */
894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
896 FALSE, /* pc_relative */
898 complain_overflow_dont, /* complain_on_overflow */
899 ppc64_elf_unhandled_reloc, /* special_function */
900 "R_PPC64_PLT64", /* name */
901 FALSE, /* partial_inplace */
903 ONES (64), /* dst_mask */
904 FALSE), /* pcrel_offset */
906 /* 64-bit PC relative relocation to the symbol's procedure linkage
908 /* FIXME: R_PPC64_PLTREL64 not supported. */
909 HOWTO (R_PPC64_PLTREL64, /* type */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
913 TRUE, /* pc_relative */
915 complain_overflow_dont, /* complain_on_overflow */
916 ppc64_elf_unhandled_reloc, /* special_function */
917 "R_PPC64_PLTREL64", /* name */
918 FALSE, /* partial_inplace */
920 ONES (64), /* dst_mask */
921 TRUE), /* pcrel_offset */
923 /* 16 bit TOC-relative relocation. */
925 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
926 HOWTO (R_PPC64_TOC16, /* type */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
930 FALSE, /* pc_relative */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc64_elf_toc_reloc, /* special_function */
934 "R_PPC64_TOC16", /* name */
935 FALSE, /* partial_inplace */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
940 /* 16 bit TOC-relative relocation without overflow. */
942 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
943 HOWTO (R_PPC64_TOC16_LO, /* type */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
947 FALSE, /* pc_relative */
949 complain_overflow_dont, /* complain_on_overflow */
950 ppc64_elf_toc_reloc, /* special_function */
951 "R_PPC64_TOC16_LO", /* name */
952 FALSE, /* partial_inplace */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
957 /* 16 bit TOC-relative relocation, high 16 bits. */
959 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
960 HOWTO (R_PPC64_TOC16_HI, /* type */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
964 FALSE, /* pc_relative */
966 complain_overflow_dont, /* complain_on_overflow */
967 ppc64_elf_toc_reloc, /* special_function */
968 "R_PPC64_TOC16_HI", /* name */
969 FALSE, /* partial_inplace */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
974 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
975 contents of the low 16 bits, treated as a signed number, is
978 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
979 HOWTO (R_PPC64_TOC16_HA, /* type */
981 1, /* size (0 = byte, 1 = short, 2 = long) */
983 FALSE, /* pc_relative */
985 complain_overflow_dont, /* complain_on_overflow */
986 ppc64_elf_toc_ha_reloc, /* special_function */
987 "R_PPC64_TOC16_HA", /* name */
988 FALSE, /* partial_inplace */
990 0xffff, /* dst_mask */
991 FALSE), /* pcrel_offset */
993 /* 64-bit relocation; insert value of TOC base (.TOC.). */
995 /* R_PPC64_TOC 51 doubleword64 .TOC. */
996 HOWTO (R_PPC64_TOC, /* type */
998 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1000 FALSE, /* pc_relative */
1002 complain_overflow_bitfield, /* complain_on_overflow */
1003 ppc64_elf_toc64_reloc, /* special_function */
1004 "R_PPC64_TOC", /* name */
1005 FALSE, /* partial_inplace */
1007 ONES (64), /* dst_mask */
1008 FALSE), /* pcrel_offset */
1010 /* Like R_PPC64_GOT16, but also informs the link editor that the
1011 value to relocate may (!) refer to a PLT entry which the link
1012 editor (a) may replace with the symbol value. If the link editor
1013 is unable to fully resolve the symbol, it may (b) create a PLT
1014 entry and store the address to the new PLT entry in the GOT.
1015 This permits lazy resolution of function symbols at run time.
1016 The link editor may also skip all of this and just (c) emit a
1017 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1018 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1019 HOWTO (R_PPC64_PLTGOT16, /* type */
1021 1, /* size (0 = byte, 1 = short, 2 = long) */
1023 FALSE, /* pc_relative */
1025 complain_overflow_signed, /* complain_on_overflow */
1026 ppc64_elf_unhandled_reloc, /* special_function */
1027 "R_PPC64_PLTGOT16", /* name */
1028 FALSE, /* partial_inplace */
1030 0xffff, /* dst_mask */
1031 FALSE), /* pcrel_offset */
1033 /* Like R_PPC64_PLTGOT16, but without overflow. */
1034 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1035 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1039 FALSE, /* pc_relative */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 ppc64_elf_unhandled_reloc, /* special_function */
1043 "R_PPC64_PLTGOT16_LO", /* name */
1044 FALSE, /* partial_inplace */
1046 0xffff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
1049 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1050 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1051 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1052 16, /* rightshift */
1053 1, /* size (0 = byte, 1 = short, 2 = long) */
1055 FALSE, /* pc_relative */
1057 complain_overflow_dont, /* complain_on_overflow */
1058 ppc64_elf_unhandled_reloc, /* special_function */
1059 "R_PPC64_PLTGOT16_HI", /* name */
1060 FALSE, /* partial_inplace */
1062 0xffff, /* dst_mask */
1063 FALSE), /* pcrel_offset */
1065 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1066 1 if the contents of the low 16 bits, treated as a signed number,
1068 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1069 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1070 16, /* rightshift */
1071 1, /* size (0 = byte, 1 = short, 2 = long) */
1073 FALSE, /* pc_relative */
1075 complain_overflow_dont,/* complain_on_overflow */
1076 ppc64_elf_unhandled_reloc, /* special_function */
1077 "R_PPC64_PLTGOT16_HA", /* name */
1078 FALSE, /* partial_inplace */
1080 0xffff, /* dst_mask */
1081 FALSE), /* pcrel_offset */
1083 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1084 HOWTO (R_PPC64_ADDR16_DS, /* type */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1088 FALSE, /* pc_relative */
1090 complain_overflow_bitfield, /* complain_on_overflow */
1091 bfd_elf_generic_reloc, /* special_function */
1092 "R_PPC64_ADDR16_DS", /* name */
1093 FALSE, /* partial_inplace */
1095 0xfffc, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1098 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1099 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1103 FALSE, /* pc_relative */
1105 complain_overflow_dont,/* complain_on_overflow */
1106 bfd_elf_generic_reloc, /* special_function */
1107 "R_PPC64_ADDR16_LO_DS",/* name */
1108 FALSE, /* partial_inplace */
1110 0xfffc, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1113 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_GOT16_DS, /* type */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1118 FALSE, /* pc_relative */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc64_elf_unhandled_reloc, /* special_function */
1122 "R_PPC64_GOT16_DS", /* name */
1123 FALSE, /* partial_inplace */
1125 0xfffc, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1128 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1133 FALSE, /* pc_relative */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc64_elf_unhandled_reloc, /* special_function */
1137 "R_PPC64_GOT16_LO_DS", /* name */
1138 FALSE, /* partial_inplace */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1143 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1148 FALSE, /* pc_relative */
1150 complain_overflow_dont, /* complain_on_overflow */
1151 ppc64_elf_unhandled_reloc, /* special_function */
1152 "R_PPC64_PLT16_LO_DS", /* name */
1153 FALSE, /* partial_inplace */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1158 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1163 FALSE, /* pc_relative */
1165 complain_overflow_bitfield, /* complain_on_overflow */
1166 ppc64_elf_sectoff_reloc, /* special_function */
1167 "R_PPC64_SECTOFF_DS", /* name */
1168 FALSE, /* partial_inplace */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1173 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 FALSE, /* pc_relative */
1180 complain_overflow_dont, /* complain_on_overflow */
1181 ppc64_elf_sectoff_reloc, /* special_function */
1182 "R_PPC64_SECTOFF_LO_DS",/* name */
1183 FALSE, /* partial_inplace */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1188 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_TOC16_DS, /* type */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 FALSE, /* pc_relative */
1195 complain_overflow_signed, /* complain_on_overflow */
1196 ppc64_elf_toc_reloc, /* special_function */
1197 "R_PPC64_TOC16_DS", /* name */
1198 FALSE, /* partial_inplace */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1203 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1208 FALSE, /* pc_relative */
1210 complain_overflow_dont, /* complain_on_overflow */
1211 ppc64_elf_toc_reloc, /* special_function */
1212 "R_PPC64_TOC16_LO_DS", /* name */
1213 FALSE, /* partial_inplace */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1218 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1219 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1220 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 FALSE, /* pc_relative */
1226 complain_overflow_signed, /* complain_on_overflow */
1227 ppc64_elf_unhandled_reloc, /* special_function */
1228 "R_PPC64_PLTGOT16_DS", /* name */
1229 FALSE, /* partial_inplace */
1231 0xfffc, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1234 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1235 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1236 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1240 FALSE, /* pc_relative */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc64_elf_unhandled_reloc, /* special_function */
1244 "R_PPC64_PLTGOT16_LO_DS",/* name */
1245 FALSE, /* partial_inplace */
1247 0xfffc, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1250 /* Marker relocs for TLS. */
1253 2, /* size (0 = byte, 1 = short, 2 = long) */
1255 FALSE, /* pc_relative */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 bfd_elf_generic_reloc, /* special_function */
1259 "R_PPC64_TLS", /* name */
1260 FALSE, /* partial_inplace */
1263 FALSE), /* pcrel_offset */
1265 HOWTO (R_PPC64_TLSGD,
1267 2, /* size (0 = byte, 1 = short, 2 = long) */
1269 FALSE, /* pc_relative */
1271 complain_overflow_dont, /* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC64_TLSGD", /* name */
1274 FALSE, /* partial_inplace */
1277 FALSE), /* pcrel_offset */
1279 HOWTO (R_PPC64_TLSLD,
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1283 FALSE, /* pc_relative */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC64_TLSLD", /* name */
1288 FALSE, /* partial_inplace */
1291 FALSE), /* pcrel_offset */
1293 HOWTO (R_PPC64_TOCSAVE,
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 FALSE, /* pc_relative */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TOCSAVE", /* name */
1302 FALSE, /* partial_inplace */
1305 FALSE), /* pcrel_offset */
1307 /* Computes the load module index of the load module that contains the
1308 definition of its TLS sym. */
1309 HOWTO (R_PPC64_DTPMOD64,
1311 4, /* size (0 = byte, 1 = short, 2 = long) */
1313 FALSE, /* pc_relative */
1315 complain_overflow_dont, /* complain_on_overflow */
1316 ppc64_elf_unhandled_reloc, /* special_function */
1317 "R_PPC64_DTPMOD64", /* name */
1318 FALSE, /* partial_inplace */
1320 ONES (64), /* dst_mask */
1321 FALSE), /* pcrel_offset */
1323 /* Computes a dtv-relative displacement, the difference between the value
1324 of sym+add and the base address of the thread-local storage block that
1325 contains the definition of sym, minus 0x8000. */
1326 HOWTO (R_PPC64_DTPREL64,
1328 4, /* size (0 = byte, 1 = short, 2 = long) */
1330 FALSE, /* pc_relative */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPREL64", /* name */
1335 FALSE, /* partial_inplace */
1337 ONES (64), /* dst_mask */
1338 FALSE), /* pcrel_offset */
1340 /* A 16 bit dtprel reloc. */
1341 HOWTO (R_PPC64_DTPREL16,
1343 1, /* size (0 = byte, 1 = short, 2 = long) */
1345 FALSE, /* pc_relative */
1347 complain_overflow_signed, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL16", /* name */
1350 FALSE, /* partial_inplace */
1352 0xffff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1355 /* Like DTPREL16, but no overflow. */
1356 HOWTO (R_PPC64_DTPREL16_LO,
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1360 FALSE, /* pc_relative */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16_LO", /* name */
1365 FALSE, /* partial_inplace */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1370 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1371 HOWTO (R_PPC64_DTPREL16_HI,
1372 16, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1375 FALSE, /* pc_relative */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_HI", /* name */
1380 FALSE, /* partial_inplace */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1385 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1386 HOWTO (R_PPC64_DTPREL16_HA,
1387 16, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1390 FALSE, /* pc_relative */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HA", /* name */
1395 FALSE, /* partial_inplace */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1400 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1401 HOWTO (R_PPC64_DTPREL16_HIGHER,
1402 32, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1405 FALSE, /* pc_relative */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_HIGHER", /* name */
1410 FALSE, /* partial_inplace */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1415 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1417 32, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1420 FALSE, /* pc_relative */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HIGHERA", /* name */
1425 FALSE, /* partial_inplace */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1430 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1432 48, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1435 FALSE, /* pc_relative */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HIGHEST", /* name */
1440 FALSE, /* partial_inplace */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1445 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1447 48, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1450 FALSE, /* pc_relative */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1455 FALSE, /* partial_inplace */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1460 /* Like DTPREL16, but for insns with a DS field. */
1461 HOWTO (R_PPC64_DTPREL16_DS,
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1465 FALSE, /* pc_relative */
1467 complain_overflow_signed, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_DS", /* name */
1470 FALSE, /* partial_inplace */
1472 0xfffc, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1475 /* Like DTPREL16_DS, but no overflow. */
1476 HOWTO (R_PPC64_DTPREL16_LO_DS,
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1480 FALSE, /* pc_relative */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_LO_DS", /* name */
1485 FALSE, /* partial_inplace */
1487 0xfffc, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1490 /* Computes a tp-relative displacement, the difference between the value of
1491 sym+add and the value of the thread pointer (r13). */
1492 HOWTO (R_PPC64_TPREL64,
1494 4, /* size (0 = byte, 1 = short, 2 = long) */
1496 FALSE, /* pc_relative */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc64_elf_unhandled_reloc, /* special_function */
1500 "R_PPC64_TPREL64", /* name */
1501 FALSE, /* partial_inplace */
1503 ONES (64), /* dst_mask */
1504 FALSE), /* pcrel_offset */
1506 /* A 16 bit tprel reloc. */
1507 HOWTO (R_PPC64_TPREL16,
1509 1, /* size (0 = byte, 1 = short, 2 = long) */
1511 FALSE, /* pc_relative */
1513 complain_overflow_signed, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL16", /* name */
1516 FALSE, /* partial_inplace */
1518 0xffff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1521 /* Like TPREL16, but no overflow. */
1522 HOWTO (R_PPC64_TPREL16_LO,
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1526 FALSE, /* pc_relative */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16_LO", /* name */
1531 FALSE, /* partial_inplace */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1536 /* Like TPREL16_LO, but next higher group of 16 bits. */
1537 HOWTO (R_PPC64_TPREL16_HI,
1538 16, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1541 FALSE, /* pc_relative */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_HI", /* name */
1546 FALSE, /* partial_inplace */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1551 /* Like TPREL16_HI, but adjust for low 16 bits. */
1552 HOWTO (R_PPC64_TPREL16_HA,
1553 16, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1556 FALSE, /* pc_relative */
1558 complain_overflow_dont, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HA", /* name */
1561 FALSE, /* partial_inplace */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1566 /* Like TPREL16_HI, but next higher group of 16 bits. */
1567 HOWTO (R_PPC64_TPREL16_HIGHER,
1568 32, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1571 FALSE, /* pc_relative */
1573 complain_overflow_dont, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_HIGHER", /* name */
1576 FALSE, /* partial_inplace */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1581 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HIGHERA,
1583 32, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1586 FALSE, /* pc_relative */
1588 complain_overflow_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HIGHERA", /* name */
1591 FALSE, /* partial_inplace */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1596 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HIGHEST,
1598 48, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1601 FALSE, /* pc_relative */
1603 complain_overflow_dont, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HIGHEST", /* name */
1606 FALSE, /* partial_inplace */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1611 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1613 48, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1616 FALSE, /* pc_relative */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHESTA", /* name */
1621 FALSE, /* partial_inplace */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1626 /* Like TPREL16, but for insns with a DS field. */
1627 HOWTO (R_PPC64_TPREL16_DS,
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1631 FALSE, /* pc_relative */
1633 complain_overflow_signed, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_DS", /* name */
1636 FALSE, /* partial_inplace */
1638 0xfffc, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1641 /* Like TPREL16_DS, but no overflow. */
1642 HOWTO (R_PPC64_TPREL16_LO_DS,
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1646 FALSE, /* pc_relative */
1648 complain_overflow_dont, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_LO_DS", /* name */
1651 FALSE, /* partial_inplace */
1653 0xfffc, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1656 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1657 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1658 to the first entry relative to the TOC base (r2). */
1659 HOWTO (R_PPC64_GOT_TLSGD16,
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1663 FALSE, /* pc_relative */
1665 complain_overflow_signed, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_GOT_TLSGD16", /* name */
1668 FALSE, /* partial_inplace */
1670 0xffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1673 /* Like GOT_TLSGD16, but no overflow. */
1674 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1678 FALSE, /* pc_relative */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc64_elf_unhandled_reloc, /* special_function */
1682 "R_PPC64_GOT_TLSGD16_LO", /* name */
1683 FALSE, /* partial_inplace */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1688 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1689 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1690 16, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1693 FALSE, /* pc_relative */
1695 complain_overflow_dont, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSGD16_HI", /* name */
1698 FALSE, /* partial_inplace */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1703 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1704 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1708 FALSE, /* pc_relative */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16_HA", /* name */
1713 FALSE, /* partial_inplace */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1718 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1719 with values (sym+add)@dtpmod and zero, and computes the offset to the
1720 first entry relative to the TOC base (r2). */
1721 HOWTO (R_PPC64_GOT_TLSLD16,
1723 1, /* size (0 = byte, 1 = short, 2 = long) */
1725 FALSE, /* pc_relative */
1727 complain_overflow_signed, /* complain_on_overflow */
1728 ppc64_elf_unhandled_reloc, /* special_function */
1729 "R_PPC64_GOT_TLSLD16", /* name */
1730 FALSE, /* partial_inplace */
1732 0xffff, /* dst_mask */
1733 FALSE), /* pcrel_offset */
1735 /* Like GOT_TLSLD16, but no overflow. */
1736 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1738 1, /* size (0 = byte, 1 = short, 2 = long) */
1740 FALSE, /* pc_relative */
1742 complain_overflow_dont, /* complain_on_overflow */
1743 ppc64_elf_unhandled_reloc, /* special_function */
1744 "R_PPC64_GOT_TLSLD16_LO", /* name */
1745 FALSE, /* partial_inplace */
1747 0xffff, /* dst_mask */
1748 FALSE), /* pcrel_offset */
1750 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1751 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1752 16, /* rightshift */
1753 1, /* size (0 = byte, 1 = short, 2 = long) */
1755 FALSE, /* pc_relative */
1757 complain_overflow_dont, /* complain_on_overflow */
1758 ppc64_elf_unhandled_reloc, /* special_function */
1759 "R_PPC64_GOT_TLSLD16_HI", /* name */
1760 FALSE, /* partial_inplace */
1762 0xffff, /* dst_mask */
1763 FALSE), /* pcrel_offset */
1765 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1766 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1767 16, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1770 FALSE, /* pc_relative */
1772 complain_overflow_dont, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16_HA", /* name */
1775 FALSE, /* partial_inplace */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1780 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1781 the offset to the entry relative to the TOC base (r2). */
1782 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1784 1, /* size (0 = byte, 1 = short, 2 = long) */
1786 FALSE, /* pc_relative */
1788 complain_overflow_signed, /* complain_on_overflow */
1789 ppc64_elf_unhandled_reloc, /* special_function */
1790 "R_PPC64_GOT_DTPREL16_DS", /* name */
1791 FALSE, /* partial_inplace */
1793 0xfffc, /* dst_mask */
1794 FALSE), /* pcrel_offset */
1796 /* Like GOT_DTPREL16_DS, but no overflow. */
1797 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1799 1, /* size (0 = byte, 1 = short, 2 = long) */
1801 FALSE, /* pc_relative */
1803 complain_overflow_dont, /* complain_on_overflow */
1804 ppc64_elf_unhandled_reloc, /* special_function */
1805 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1806 FALSE, /* partial_inplace */
1808 0xfffc, /* dst_mask */
1809 FALSE), /* pcrel_offset */
1811 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1812 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1813 16, /* rightshift */
1814 1, /* size (0 = byte, 1 = short, 2 = long) */
1816 FALSE, /* pc_relative */
1818 complain_overflow_dont, /* complain_on_overflow */
1819 ppc64_elf_unhandled_reloc, /* special_function */
1820 "R_PPC64_GOT_DTPREL16_HI", /* name */
1821 FALSE, /* partial_inplace */
1823 0xffff, /* dst_mask */
1824 FALSE), /* pcrel_offset */
1826 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1827 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1828 16, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1831 FALSE, /* pc_relative */
1833 complain_overflow_dont, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_HA", /* name */
1836 FALSE, /* partial_inplace */
1838 0xffff, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1841 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1842 offset to the entry relative to the TOC base (r2). */
1843 HOWTO (R_PPC64_GOT_TPREL16_DS,
1845 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 FALSE, /* pc_relative */
1849 complain_overflow_signed, /* complain_on_overflow */
1850 ppc64_elf_unhandled_reloc, /* special_function */
1851 "R_PPC64_GOT_TPREL16_DS", /* name */
1852 FALSE, /* partial_inplace */
1854 0xfffc, /* dst_mask */
1855 FALSE), /* pcrel_offset */
1857 /* Like GOT_TPREL16_DS, but no overflow. */
1858 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1860 1, /* size (0 = byte, 1 = short, 2 = long) */
1862 FALSE, /* pc_relative */
1864 complain_overflow_dont, /* complain_on_overflow */
1865 ppc64_elf_unhandled_reloc, /* special_function */
1866 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1867 FALSE, /* partial_inplace */
1869 0xfffc, /* dst_mask */
1870 FALSE), /* pcrel_offset */
1872 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1873 HOWTO (R_PPC64_GOT_TPREL16_HI,
1874 16, /* rightshift */
1875 1, /* size (0 = byte, 1 = short, 2 = long) */
1877 FALSE, /* pc_relative */
1879 complain_overflow_dont, /* complain_on_overflow */
1880 ppc64_elf_unhandled_reloc, /* special_function */
1881 "R_PPC64_GOT_TPREL16_HI", /* name */
1882 FALSE, /* partial_inplace */
1884 0xffff, /* dst_mask */
1885 FALSE), /* pcrel_offset */
1887 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1888 HOWTO (R_PPC64_GOT_TPREL16_HA,
1889 16, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1892 FALSE, /* pc_relative */
1894 complain_overflow_dont, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_HA", /* name */
1897 FALSE, /* partial_inplace */
1899 0xffff, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1902 HOWTO (R_PPC64_JMP_IREL, /* type */
1904 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1906 FALSE, /* pc_relative */
1908 complain_overflow_dont, /* complain_on_overflow */
1909 ppc64_elf_unhandled_reloc, /* special_function */
1910 "R_PPC64_JMP_IREL", /* name */
1911 FALSE, /* partial_inplace */
1914 FALSE), /* pcrel_offset */
1916 HOWTO (R_PPC64_IRELATIVE, /* type */
1918 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1920 FALSE, /* pc_relative */
1922 complain_overflow_dont, /* complain_on_overflow */
1923 bfd_elf_generic_reloc, /* special_function */
1924 "R_PPC64_IRELATIVE", /* name */
1925 FALSE, /* partial_inplace */
1927 ONES (64), /* dst_mask */
1928 FALSE), /* pcrel_offset */
1930 /* A 16 bit relative relocation. */
1931 HOWTO (R_PPC64_REL16, /* type */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1935 TRUE, /* pc_relative */
1937 complain_overflow_bitfield, /* complain_on_overflow */
1938 bfd_elf_generic_reloc, /* special_function */
1939 "R_PPC64_REL16", /* name */
1940 FALSE, /* partial_inplace */
1942 0xffff, /* dst_mask */
1943 TRUE), /* pcrel_offset */
1945 /* A 16 bit relative relocation without overflow. */
1946 HOWTO (R_PPC64_REL16_LO, /* type */
1948 1, /* size (0 = byte, 1 = short, 2 = long) */
1950 TRUE, /* pc_relative */
1952 complain_overflow_dont,/* complain_on_overflow */
1953 bfd_elf_generic_reloc, /* special_function */
1954 "R_PPC64_REL16_LO", /* name */
1955 FALSE, /* partial_inplace */
1957 0xffff, /* dst_mask */
1958 TRUE), /* pcrel_offset */
1960 /* The high order 16 bits of a relative address. */
1961 HOWTO (R_PPC64_REL16_HI, /* type */
1962 16, /* rightshift */
1963 1, /* size (0 = byte, 1 = short, 2 = long) */
1965 TRUE, /* pc_relative */
1967 complain_overflow_dont, /* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_REL16_HI", /* name */
1970 FALSE, /* partial_inplace */
1972 0xffff, /* dst_mask */
1973 TRUE), /* pcrel_offset */
1975 /* The high order 16 bits of a relative address, plus 1 if the contents of
1976 the low 16 bits, treated as a signed number, is negative. */
1977 HOWTO (R_PPC64_REL16_HA, /* type */
1978 16, /* rightshift */
1979 1, /* size (0 = byte, 1 = short, 2 = long) */
1981 TRUE, /* pc_relative */
1983 complain_overflow_dont, /* complain_on_overflow */
1984 ppc64_elf_ha_reloc, /* special_function */
1985 "R_PPC64_REL16_HA", /* name */
1986 FALSE, /* partial_inplace */
1988 0xffff, /* dst_mask */
1989 TRUE), /* pcrel_offset */
1991 /* GNU extension to record C++ vtable hierarchy. */
1992 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1994 0, /* size (0 = byte, 1 = short, 2 = long) */
1996 FALSE, /* pc_relative */
1998 complain_overflow_dont, /* complain_on_overflow */
1999 NULL, /* special_function */
2000 "R_PPC64_GNU_VTINHERIT", /* name */
2001 FALSE, /* partial_inplace */
2004 FALSE), /* pcrel_offset */
2006 /* GNU extension to record C++ vtable member usage. */
2007 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2009 0, /* size (0 = byte, 1 = short, 2 = long) */
2011 FALSE, /* pc_relative */
2013 complain_overflow_dont, /* complain_on_overflow */
2014 NULL, /* special_function */
2015 "R_PPC64_GNU_VTENTRY", /* name */
2016 FALSE, /* partial_inplace */
2019 FALSE), /* pcrel_offset */
2023 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2027 ppc_howto_init (void)
2029 unsigned int i, type;
2032 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2035 type = ppc64_elf_howto_raw[i].type;
2036 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2037 / sizeof (ppc64_elf_howto_table[0])));
2038 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2042 static reloc_howto_type *
2043 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2044 bfd_reloc_code_real_type code)
2046 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2048 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2049 /* Initialize howto table if needed. */
2057 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2059 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2061 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2063 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2065 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2067 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2069 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2071 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2073 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2075 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2077 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2079 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2081 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2083 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2085 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2087 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2089 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2091 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2093 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2095 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2097 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2099 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2101 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2103 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2105 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2107 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2109 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2111 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2113 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2115 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2117 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2119 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2121 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2123 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2125 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2127 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2129 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2131 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2133 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2135 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2137 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2139 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2141 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2143 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2145 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2147 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2149 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2151 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2153 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2155 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2157 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2159 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2161 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2163 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2165 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2167 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2169 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2171 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2173 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2175 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2177 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2179 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2181 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2183 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2185 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2187 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2189 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2191 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2193 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2195 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2197 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2199 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2201 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2203 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2205 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2207 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2209 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2211 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2213 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2215 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2217 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2219 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2221 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2223 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2225 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2227 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2229 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2231 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2233 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2235 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2237 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2239 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2241 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2243 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2245 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2247 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2249 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2251 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2253 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2255 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2257 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2259 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2261 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2263 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2265 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2267 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2269 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2273 return ppc64_elf_howto_table[r];
2276 static reloc_howto_type *
2277 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2283 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2285 if (ppc64_elf_howto_raw[i].name != NULL
2286 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2287 return &ppc64_elf_howto_raw[i];
2292 /* Set the howto pointer for a PowerPC ELF reloc. */
2295 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2296 Elf_Internal_Rela *dst)
2300 /* Initialize howto table if needed. */
2301 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2304 type = ELF64_R_TYPE (dst->r_info);
2305 if (type >= (sizeof (ppc64_elf_howto_table)
2306 / sizeof (ppc64_elf_howto_table[0])))
2308 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2310 type = R_PPC64_NONE;
2312 cache_ptr->howto = ppc64_elf_howto_table[type];
2315 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2317 static bfd_reloc_status_type
2318 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2319 void *data, asection *input_section,
2320 bfd *output_bfd, char **error_message)
2322 /* If this is a relocatable link (output_bfd test tells us), just
2323 call the generic function. Any adjustment will be done at final
2325 if (output_bfd != NULL)
2326 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2327 input_section, output_bfd, error_message);
2329 /* Adjust the addend for sign extension of the low 16 bits.
2330 We won't actually be using the low 16 bits, so trashing them
2332 reloc_entry->addend += 0x8000;
2333 return bfd_reloc_continue;
2336 static bfd_reloc_status_type
2337 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2338 void *data, asection *input_section,
2339 bfd *output_bfd, char **error_message)
2341 if (output_bfd != NULL)
2342 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2343 input_section, output_bfd, error_message);
2345 if (strcmp (symbol->section->name, ".opd") == 0
2346 && (symbol->section->owner->flags & DYNAMIC) == 0)
2348 bfd_vma dest = opd_entry_value (symbol->section,
2349 symbol->value + reloc_entry->addend,
2351 if (dest != (bfd_vma) -1)
2352 reloc_entry->addend = dest - (symbol->value
2353 + symbol->section->output_section->vma
2354 + symbol->section->output_offset);
2356 return bfd_reloc_continue;
2359 static bfd_reloc_status_type
2360 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2361 void *data, asection *input_section,
2362 bfd *output_bfd, char **error_message)
2365 enum elf_ppc64_reloc_type r_type;
2366 bfd_size_type octets;
2367 /* Assume 'at' branch hints. */
2368 bfd_boolean is_isa_v2 = TRUE;
2370 /* If this is a relocatable link (output_bfd test tells us), just
2371 call the generic function. Any adjustment will be done at final
2373 if (output_bfd != NULL)
2374 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2375 input_section, output_bfd, error_message);
2377 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2378 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2379 insn &= ~(0x01 << 21);
2380 r_type = reloc_entry->howto->type;
2381 if (r_type == R_PPC64_ADDR14_BRTAKEN
2382 || r_type == R_PPC64_REL14_BRTAKEN)
2383 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2387 /* Set 'a' bit. This is 0b00010 in BO field for branch
2388 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2389 for branch on CTR insns (BO == 1a00t or 1a01t). */
2390 if ((insn & (0x14 << 21)) == (0x04 << 21))
2392 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2402 if (!bfd_is_com_section (symbol->section))
2403 target = symbol->value;
2404 target += symbol->section->output_section->vma;
2405 target += symbol->section->output_offset;
2406 target += reloc_entry->addend;
2408 from = (reloc_entry->address
2409 + input_section->output_offset
2410 + input_section->output_section->vma);
2412 /* Invert 'y' bit if not the default. */
2413 if ((bfd_signed_vma) (target - from) < 0)
2416 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2418 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2419 input_section, output_bfd, error_message);
2422 static bfd_reloc_status_type
2423 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2424 void *data, asection *input_section,
2425 bfd *output_bfd, char **error_message)
2427 /* If this is a relocatable link (output_bfd test tells us), just
2428 call the generic function. Any adjustment will be done at final
2430 if (output_bfd != NULL)
2431 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2432 input_section, output_bfd, error_message);
2434 /* Subtract the symbol section base address. */
2435 reloc_entry->addend -= symbol->section->output_section->vma;
2436 return bfd_reloc_continue;
2439 static bfd_reloc_status_type
2440 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2441 void *data, asection *input_section,
2442 bfd *output_bfd, char **error_message)
2444 /* If this is a relocatable link (output_bfd test tells us), just
2445 call the generic function. Any adjustment will be done at final
2447 if (output_bfd != NULL)
2448 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2449 input_section, output_bfd, error_message);
2451 /* Subtract the symbol section base address. */
2452 reloc_entry->addend -= symbol->section->output_section->vma;
2454 /* Adjust the addend for sign extension of the low 16 bits. */
2455 reloc_entry->addend += 0x8000;
2456 return bfd_reloc_continue;
2459 static bfd_reloc_status_type
2460 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2461 void *data, asection *input_section,
2462 bfd *output_bfd, char **error_message)
2466 /* If this is a relocatable link (output_bfd test tells us), just
2467 call the generic function. Any adjustment will be done at final
2469 if (output_bfd != NULL)
2470 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2471 input_section, output_bfd, error_message);
2473 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2475 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2477 /* Subtract the TOC base address. */
2478 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2479 return bfd_reloc_continue;
2482 static bfd_reloc_status_type
2483 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2484 void *data, asection *input_section,
2485 bfd *output_bfd, char **error_message)
2489 /* If this is a relocatable link (output_bfd test tells us), just
2490 call the generic function. Any adjustment will be done at final
2492 if (output_bfd != NULL)
2493 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2494 input_section, output_bfd, error_message);
2496 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2498 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2500 /* Subtract the TOC base address. */
2501 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2503 /* Adjust the addend for sign extension of the low 16 bits. */
2504 reloc_entry->addend += 0x8000;
2505 return bfd_reloc_continue;
2508 static bfd_reloc_status_type
2509 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2510 void *data, asection *input_section,
2511 bfd *output_bfd, char **error_message)
2514 bfd_size_type octets;
2516 /* If this is a relocatable link (output_bfd test tells us), just
2517 call the generic function. Any adjustment will be done at final
2519 if (output_bfd != NULL)
2520 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2521 input_section, output_bfd, error_message);
2523 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2525 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2527 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2528 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2529 return bfd_reloc_ok;
2532 static bfd_reloc_status_type
2533 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2534 void *data, asection *input_section,
2535 bfd *output_bfd, char **error_message)
2537 /* If this is a relocatable link (output_bfd test tells us), just
2538 call the generic function. Any adjustment will be done at final
2540 if (output_bfd != NULL)
2541 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2542 input_section, output_bfd, error_message);
2544 if (error_message != NULL)
2546 static char buf[60];
2547 sprintf (buf, "generic linker can't handle %s",
2548 reloc_entry->howto->name);
2549 *error_message = buf;
2551 return bfd_reloc_dangerous;
2554 /* Track GOT entries needed for a given symbol. We might need more
2555 than one got entry per symbol. */
2558 struct got_entry *next;
2560 /* The symbol addend that we'll be placing in the GOT. */
2563 /* Unlike other ELF targets, we use separate GOT entries for the same
2564 symbol referenced from different input files. This is to support
2565 automatic multiple TOC/GOT sections, where the TOC base can vary
2566 from one input file to another. After partitioning into TOC groups
2567 we merge entries within the group.
2569 Point to the BFD owning this GOT entry. */
2572 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2573 TLS_TPREL or TLS_DTPREL for tls entries. */
2574 unsigned char tls_type;
2576 /* Non-zero if got.ent points to real entry. */
2577 unsigned char is_indirect;
2579 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2582 bfd_signed_vma refcount;
2584 struct got_entry *ent;
2588 /* The same for PLT. */
2591 struct plt_entry *next;
2597 bfd_signed_vma refcount;
2602 struct ppc64_elf_obj_tdata
2604 struct elf_obj_tdata elf;
2606 /* Shortcuts to dynamic linker sections. */
2610 /* Used during garbage collection. We attach global symbols defined
2611 on removed .opd entries to this section so that the sym is removed. */
2612 asection *deleted_section;
2614 /* TLS local dynamic got entry handling. Support for multiple GOT
2615 sections means we potentially need one of these for each input bfd. */
2616 struct got_entry tlsld_got;
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 /* Used to track dynamic relocations for local symbols. */
3642 struct ppc_dyn_relocs
3644 struct ppc_dyn_relocs *next;
3646 /* The input section of the reloc. */
3649 /* Total number of relocs copied for the input section. */
3650 unsigned int count : 31;
3652 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3653 unsigned int ifunc : 1;
3656 struct ppc_link_hash_entry
3658 struct elf_link_hash_entry elf;
3661 /* A pointer to the most recently used stub hash entry against this
3663 struct ppc_stub_hash_entry *stub_cache;
3665 /* A pointer to the next symbol starting with a '.' */
3666 struct ppc_link_hash_entry *next_dot_sym;
3669 /* Track dynamic relocs copied for this symbol. */
3670 struct elf_dyn_relocs *dyn_relocs;
3672 /* Link between function code and descriptor symbols. */
3673 struct ppc_link_hash_entry *oh;
3675 /* Flag function code and descriptor symbols. */
3676 unsigned int is_func:1;
3677 unsigned int is_func_descriptor:1;
3678 unsigned int fake:1;
3680 /* Whether global opd/toc sym has been adjusted or not.
3681 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3682 should be set for all globals defined in any opd/toc section. */
3683 unsigned int adjust_done:1;
3685 /* Set if we twiddled this symbol to weak at some stage. */
3686 unsigned int was_undefined:1;
3688 /* Contexts in which symbol is used in the GOT (or TOC).
3689 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3690 corresponding relocs are encountered during check_relocs.
3691 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3692 indicate the corresponding GOT entry type is not needed.
3693 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3694 a TPREL one. We use a separate flag rather than setting TPREL
3695 just for convenience in distinguishing the two cases. */
3696 #define TLS_GD 1 /* GD reloc. */
3697 #define TLS_LD 2 /* LD reloc. */
3698 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3699 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3700 #define TLS_TLS 16 /* Any TLS reloc. */
3701 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3702 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3703 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3704 unsigned char tls_mask;
3707 /* ppc64 ELF linker hash table. */
3709 struct ppc_link_hash_table
3711 struct elf_link_hash_table elf;
3713 /* The stub hash table. */
3714 struct bfd_hash_table stub_hash_table;
3716 /* Another hash table for plt_branch stubs. */
3717 struct bfd_hash_table branch_hash_table;
3719 /* Hash table for function prologue tocsave. */
3720 htab_t tocsave_htab;
3722 /* Linker stub bfd. */
3725 /* Linker call-backs. */
3726 asection * (*add_stub_section) (const char *, asection *);
3727 void (*layout_sections_again) (void);
3729 /* Array to keep track of which stub sections have been created, and
3730 information on stub grouping. */
3732 /* This is the section to which stubs in the group will be attached. */
3734 /* The stub section. */
3736 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3740 /* Temp used when calculating TOC pointers. */
3743 asection *toc_first_sec;
3745 /* Highest input section id. */
3748 /* Highest output section index. */
3751 /* Used when adding symbols. */
3752 struct ppc_link_hash_entry *dot_syms;
3754 /* List of input sections for each output section. */
3755 asection **input_list;
3757 /* Short-cuts to get to dynamic linker sections. */
3769 asection *glink_eh_frame;
3771 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3772 struct ppc_link_hash_entry *tls_get_addr;
3773 struct ppc_link_hash_entry *tls_get_addr_fd;
3775 /* The size of reliplt used by got entry relocs. */
3776 bfd_size_type got_reli_size;
3779 unsigned long stub_count[ppc_stub_plt_call_r2save];
3781 /* Number of stubs against global syms. */
3782 unsigned long stub_globals;
3784 /* Alignment of PLT call stubs. */
3785 unsigned int plt_stub_align:4;
3787 /* Set if PLT call stubs should load r11. */
3788 unsigned int plt_static_chain:1;
3790 /* Set if PLT call stubs need a read-read barrier. */
3791 unsigned int plt_thread_safe:1;
3793 /* Set if we should emit symbols for stubs. */
3794 unsigned int emit_stub_syms:1;
3796 /* Set if __tls_get_addr optimization should not be done. */
3797 unsigned int no_tls_get_addr_opt:1;
3799 /* Support for multiple toc sections. */
3800 unsigned int do_multi_toc:1;
3801 unsigned int multi_toc_needed:1;
3802 unsigned int second_toc_pass:1;
3803 unsigned int do_toc_opt:1;
3806 unsigned int stub_error:1;
3808 /* Temp used by ppc64_elf_process_dot_syms. */
3809 unsigned int twiddled_syms:1;
3811 /* Incremented every time we size stubs. */
3812 unsigned int stub_iteration;
3814 /* Small local sym cache. */
3815 struct sym_cache sym_cache;
3818 /* Rename some of the generic section flags to better document how they
3821 /* Nonzero if this section has TLS related relocations. */
3822 #define has_tls_reloc sec_flg0
3824 /* Nonzero if this section has a call to __tls_get_addr. */
3825 #define has_tls_get_addr_call sec_flg1
3827 /* Nonzero if this section has any toc or got relocs. */
3828 #define has_toc_reloc sec_flg2
3830 /* Nonzero if this section has a call to another section that uses
3832 #define makes_toc_func_call sec_flg3
3834 /* Recursion protection when determining above flag. */
3835 #define call_check_in_progress sec_flg4
3836 #define call_check_done sec_flg5
3838 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3840 #define ppc_hash_table(p) \
3841 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3842 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3844 #define ppc_stub_hash_lookup(table, string, create, copy) \
3845 ((struct ppc_stub_hash_entry *) \
3846 bfd_hash_lookup ((table), (string), (create), (copy)))
3848 #define ppc_branch_hash_lookup(table, string, create, copy) \
3849 ((struct ppc_branch_hash_entry *) \
3850 bfd_hash_lookup ((table), (string), (create), (copy)))
3852 /* Create an entry in the stub hash table. */
3854 static struct bfd_hash_entry *
3855 stub_hash_newfunc (struct bfd_hash_entry *entry,
3856 struct bfd_hash_table *table,
3859 /* Allocate the structure if it has not already been allocated by a
3863 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3868 /* Call the allocation method of the superclass. */
3869 entry = bfd_hash_newfunc (entry, table, string);
3872 struct ppc_stub_hash_entry *eh;
3874 /* Initialize the local fields. */
3875 eh = (struct ppc_stub_hash_entry *) entry;
3876 eh->stub_type = ppc_stub_none;
3877 eh->stub_sec = NULL;
3878 eh->stub_offset = 0;
3879 eh->target_value = 0;
3880 eh->target_section = NULL;
3888 /* Create an entry in the branch hash table. */
3890 static struct bfd_hash_entry *
3891 branch_hash_newfunc (struct bfd_hash_entry *entry,
3892 struct bfd_hash_table *table,
3895 /* Allocate the structure if it has not already been allocated by a
3899 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3904 /* Call the allocation method of the superclass. */
3905 entry = bfd_hash_newfunc (entry, table, string);
3908 struct ppc_branch_hash_entry *eh;
3910 /* Initialize the local fields. */
3911 eh = (struct ppc_branch_hash_entry *) entry;
3919 /* Create an entry in a ppc64 ELF linker hash table. */
3921 static struct bfd_hash_entry *
3922 link_hash_newfunc (struct bfd_hash_entry *entry,
3923 struct bfd_hash_table *table,
3926 /* Allocate the structure if it has not already been allocated by a
3930 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3935 /* Call the allocation method of the superclass. */
3936 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3939 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3941 memset (&eh->u.stub_cache, 0,
3942 (sizeof (struct ppc_link_hash_entry)
3943 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3945 /* When making function calls, old ABI code references function entry
3946 points (dot symbols), while new ABI code references the function
3947 descriptor symbol. We need to make any combination of reference and
3948 definition work together, without breaking archive linking.
3950 For a defined function "foo" and an undefined call to "bar":
3951 An old object defines "foo" and ".foo", references ".bar" (possibly
3953 A new object defines "foo" and references "bar".
3955 A new object thus has no problem with its undefined symbols being
3956 satisfied by definitions in an old object. On the other hand, the
3957 old object won't have ".bar" satisfied by a new object.
3959 Keep a list of newly added dot-symbols. */
3961 if (string[0] == '.')
3963 struct ppc_link_hash_table *htab;
3965 htab = (struct ppc_link_hash_table *) table;
3966 eh->u.next_dot_sym = htab->dot_syms;
3967 htab->dot_syms = eh;
3974 struct tocsave_entry {
3980 tocsave_htab_hash (const void *p)
3982 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3983 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
3987 tocsave_htab_eq (const void *p1, const void *p2)
3989 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3990 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3991 return e1->sec == e2->sec && e1->offset == e2->offset;
3994 /* Create a ppc64 ELF linker hash table. */
3996 static struct bfd_link_hash_table *
3997 ppc64_elf_link_hash_table_create (bfd *abfd)
3999 struct ppc_link_hash_table *htab;
4000 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4002 htab = bfd_zmalloc (amt);
4006 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4007 sizeof (struct ppc_link_hash_entry),
4014 /* Init the stub hash table too. */
4015 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4016 sizeof (struct ppc_stub_hash_entry)))
4019 /* And the branch hash table. */
4020 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4021 sizeof (struct ppc_branch_hash_entry)))
4024 htab->tocsave_htab = htab_try_create (1024,
4028 if (htab->tocsave_htab == NULL)
4031 /* Initializing two fields of the union is just cosmetic. We really
4032 only care about glist, but when compiled on a 32-bit host the
4033 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4034 debugger inspection of these fields look nicer. */
4035 htab->elf.init_got_refcount.refcount = 0;
4036 htab->elf.init_got_refcount.glist = NULL;
4037 htab->elf.init_plt_refcount.refcount = 0;
4038 htab->elf.init_plt_refcount.glist = NULL;
4039 htab->elf.init_got_offset.offset = 0;
4040 htab->elf.init_got_offset.glist = NULL;
4041 htab->elf.init_plt_offset.offset = 0;
4042 htab->elf.init_plt_offset.glist = NULL;
4044 return &htab->elf.root;
4047 /* Free the derived linker hash table. */
4050 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4052 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4054 bfd_hash_table_free (&htab->stub_hash_table);
4055 bfd_hash_table_free (&htab->branch_hash_table);
4056 if (htab->tocsave_htab)
4057 htab_delete (htab->tocsave_htab);
4058 _bfd_elf_link_hash_table_free (hash);
4061 /* Create sections for linker generated code. */
4064 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4066 struct ppc_link_hash_table *htab;
4069 htab = ppc_hash_table (info);
4071 /* Create .sfpr for code to save and restore fp regs. */
4072 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4073 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4074 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4076 if (htab->sfpr == NULL
4077 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4080 /* Create .glink for lazy dynamic linking support. */
4081 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4083 if (htab->glink == NULL
4084 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4087 if (!info->no_ld_generated_unwind_info)
4089 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4090 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4091 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4094 if (htab->glink_eh_frame == NULL
4095 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4099 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4100 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4101 if (htab->iplt == NULL
4102 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4105 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4106 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4107 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4110 if (htab->reliplt == NULL
4111 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4114 /* Create branch lookup table for plt_branch stubs. */
4115 flags = (SEC_ALLOC | SEC_LOAD
4116 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4117 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4119 if (htab->brlt == NULL
4120 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4126 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4127 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4128 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4131 if (htab->relbrlt == NULL
4132 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4138 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4141 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4143 struct ppc_link_hash_table *htab;
4145 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4147 /* Always hook our dynamic sections into the first bfd, which is the
4148 linker created stub bfd. This ensures that the GOT header is at
4149 the start of the output TOC section. */
4150 htab = ppc_hash_table (info);
4153 htab->stub_bfd = abfd;
4154 htab->elf.dynobj = abfd;
4156 if (info->relocatable)
4159 return create_linkage_sections (htab->elf.dynobj, info);
4162 /* Build a name for an entry in the stub hash table. */
4165 ppc_stub_name (const asection *input_section,
4166 const asection *sym_sec,
4167 const struct ppc_link_hash_entry *h,
4168 const Elf_Internal_Rela *rel)
4173 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4174 offsets from a sym as a branch target? In fact, we could
4175 probably assume the addend is always zero. */
4176 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4180 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4181 stub_name = bfd_malloc (len);
4182 if (stub_name == NULL)
4185 len = sprintf (stub_name, "%08x.%s+%x",
4186 input_section->id & 0xffffffff,
4187 h->elf.root.root.string,
4188 (int) rel->r_addend & 0xffffffff);
4192 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4193 stub_name = bfd_malloc (len);
4194 if (stub_name == NULL)
4197 len = sprintf (stub_name, "%08x.%x:%x+%x",
4198 input_section->id & 0xffffffff,
4199 sym_sec->id & 0xffffffff,
4200 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4201 (int) rel->r_addend & 0xffffffff);
4203 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4204 stub_name[len - 2] = 0;
4208 /* Look up an entry in the stub hash. Stub entries are cached because
4209 creating the stub name takes a bit of time. */
4211 static struct ppc_stub_hash_entry *
4212 ppc_get_stub_entry (const asection *input_section,
4213 const asection *sym_sec,
4214 struct ppc_link_hash_entry *h,
4215 const Elf_Internal_Rela *rel,
4216 struct ppc_link_hash_table *htab)
4218 struct ppc_stub_hash_entry *stub_entry;
4219 const asection *id_sec;
4221 /* If this input section is part of a group of sections sharing one
4222 stub section, then use the id of the first section in the group.
4223 Stub names need to include a section id, as there may well be
4224 more than one stub used to reach say, printf, and we need to
4225 distinguish between them. */
4226 id_sec = htab->stub_group[input_section->id].link_sec;
4228 if (h != NULL && h->u.stub_cache != NULL
4229 && h->u.stub_cache->h == h
4230 && h->u.stub_cache->id_sec == id_sec)
4232 stub_entry = h->u.stub_cache;
4238 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4239 if (stub_name == NULL)
4242 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4243 stub_name, FALSE, FALSE);
4245 h->u.stub_cache = stub_entry;
4253 /* Add a new stub entry to the stub hash. Not all fields of the new
4254 stub entry are initialised. */
4256 static struct ppc_stub_hash_entry *
4257 ppc_add_stub (const char *stub_name,
4259 struct bfd_link_info *info)
4261 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4264 struct ppc_stub_hash_entry *stub_entry;
4266 link_sec = htab->stub_group[section->id].link_sec;
4267 stub_sec = htab->stub_group[section->id].stub_sec;
4268 if (stub_sec == NULL)
4270 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4271 if (stub_sec == NULL)
4277 namelen = strlen (link_sec->name);
4278 len = namelen + sizeof (STUB_SUFFIX);
4279 s_name = bfd_alloc (htab->stub_bfd, len);
4283 memcpy (s_name, link_sec->name, namelen);
4284 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4285 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4286 if (stub_sec == NULL)
4288 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4290 htab->stub_group[section->id].stub_sec = stub_sec;
4293 /* Enter this entry into the linker stub hash table. */
4294 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4296 if (stub_entry == NULL)
4298 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4299 section->owner, stub_name);
4303 stub_entry->stub_sec = stub_sec;
4304 stub_entry->stub_offset = 0;
4305 stub_entry->id_sec = link_sec;
4309 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4310 not already done. */
4313 create_got_section (bfd *abfd, struct bfd_link_info *info)
4315 asection *got, *relgot;
4317 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4319 if (!is_ppc64_elf (abfd))
4326 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4329 htab->got = bfd_get_linker_section (htab->elf.dynobj, ".got");
4334 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4335 | SEC_LINKER_CREATED);
4337 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4339 || !bfd_set_section_alignment (abfd, got, 3))
4342 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4343 flags | SEC_READONLY);
4345 || ! bfd_set_section_alignment (abfd, relgot, 3))
4348 ppc64_elf_tdata (abfd)->got = got;
4349 ppc64_elf_tdata (abfd)->relgot = relgot;
4353 /* Create the dynamic sections, and set up shortcuts. */
4356 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4358 struct ppc_link_hash_table *htab;
4360 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4363 htab = ppc_hash_table (info);
4368 htab->got = bfd_get_linker_section (dynobj, ".got");
4369 htab->plt = bfd_get_linker_section (dynobj, ".plt");
4370 htab->relplt = bfd_get_linker_section (dynobj, ".rela.plt");
4371 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4373 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4375 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4376 || (!info->shared && !htab->relbss))
4382 /* Follow indirect and warning symbol links. */
4384 static inline struct bfd_link_hash_entry *
4385 follow_link (struct bfd_link_hash_entry *h)
4387 while (h->type == bfd_link_hash_indirect
4388 || h->type == bfd_link_hash_warning)
4393 static inline struct elf_link_hash_entry *
4394 elf_follow_link (struct elf_link_hash_entry *h)
4396 return (struct elf_link_hash_entry *) follow_link (&h->root);
4399 static inline struct ppc_link_hash_entry *
4400 ppc_follow_link (struct ppc_link_hash_entry *h)
4402 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4405 /* Merge PLT info on FROM with that on TO. */
4408 move_plt_plist (struct ppc_link_hash_entry *from,
4409 struct ppc_link_hash_entry *to)
4411 if (from->elf.plt.plist != NULL)
4413 if (to->elf.plt.plist != NULL)
4415 struct plt_entry **entp;
4416 struct plt_entry *ent;
4418 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4420 struct plt_entry *dent;
4422 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4423 if (dent->addend == ent->addend)
4425 dent->plt.refcount += ent->plt.refcount;
4432 *entp = to->elf.plt.plist;
4435 to->elf.plt.plist = from->elf.plt.plist;
4436 from->elf.plt.plist = NULL;
4440 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4443 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4444 struct elf_link_hash_entry *dir,
4445 struct elf_link_hash_entry *ind)
4447 struct ppc_link_hash_entry *edir, *eind;
4449 edir = (struct ppc_link_hash_entry *) dir;
4450 eind = (struct ppc_link_hash_entry *) ind;
4452 edir->is_func |= eind->is_func;
4453 edir->is_func_descriptor |= eind->is_func_descriptor;
4454 edir->tls_mask |= eind->tls_mask;
4455 if (eind->oh != NULL)
4456 edir->oh = ppc_follow_link (eind->oh);
4458 /* If called to transfer flags for a weakdef during processing
4459 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4460 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4461 if (!(ELIMINATE_COPY_RELOCS
4462 && eind->elf.root.type != bfd_link_hash_indirect
4463 && edir->elf.dynamic_adjusted))
4464 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4466 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4467 edir->elf.ref_regular |= eind->elf.ref_regular;
4468 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4469 edir->elf.needs_plt |= eind->elf.needs_plt;
4471 /* Copy over any dynamic relocs we may have on the indirect sym. */
4472 if (eind->dyn_relocs != NULL)
4474 if (edir->dyn_relocs != NULL)
4476 struct elf_dyn_relocs **pp;
4477 struct elf_dyn_relocs *p;
4479 /* Add reloc counts against the indirect sym to the direct sym
4480 list. Merge any entries against the same section. */
4481 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4483 struct elf_dyn_relocs *q;
4485 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4486 if (q->sec == p->sec)
4488 q->pc_count += p->pc_count;
4489 q->count += p->count;
4496 *pp = edir->dyn_relocs;
4499 edir->dyn_relocs = eind->dyn_relocs;
4500 eind->dyn_relocs = NULL;
4503 /* If we were called to copy over info for a weak sym, that's all.
4504 You might think dyn_relocs need not be copied over; After all,
4505 both syms will be dynamic or both non-dynamic so we're just
4506 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4507 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4508 dyn_relocs in read-only sections, and it does so on what is the
4510 if (eind->elf.root.type != bfd_link_hash_indirect)
4513 /* Copy over got entries that we may have already seen to the
4514 symbol which just became indirect. */
4515 if (eind->elf.got.glist != NULL)
4517 if (edir->elf.got.glist != NULL)
4519 struct got_entry **entp;
4520 struct got_entry *ent;
4522 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4524 struct got_entry *dent;
4526 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4527 if (dent->addend == ent->addend
4528 && dent->owner == ent->owner
4529 && dent->tls_type == ent->tls_type)
4531 dent->got.refcount += ent->got.refcount;
4538 *entp = edir->elf.got.glist;
4541 edir->elf.got.glist = eind->elf.got.glist;
4542 eind->elf.got.glist = NULL;
4545 /* And plt entries. */
4546 move_plt_plist (eind, edir);
4548 if (eind->elf.dynindx != -1)
4550 if (edir->elf.dynindx != -1)
4551 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4552 edir->elf.dynstr_index);
4553 edir->elf.dynindx = eind->elf.dynindx;
4554 edir->elf.dynstr_index = eind->elf.dynstr_index;
4555 eind->elf.dynindx = -1;
4556 eind->elf.dynstr_index = 0;
4560 /* Find the function descriptor hash entry from the given function code
4561 hash entry FH. Link the entries via their OH fields. */
4563 static struct ppc_link_hash_entry *
4564 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4566 struct ppc_link_hash_entry *fdh = fh->oh;
4570 const char *fd_name = fh->elf.root.root.string + 1;
4572 fdh = (struct ppc_link_hash_entry *)
4573 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4577 fdh->is_func_descriptor = 1;
4583 return ppc_follow_link (fdh);
4586 /* Make a fake function descriptor sym for the code sym FH. */
4588 static struct ppc_link_hash_entry *
4589 make_fdh (struct bfd_link_info *info,
4590 struct ppc_link_hash_entry *fh)
4594 struct bfd_link_hash_entry *bh;
4595 struct ppc_link_hash_entry *fdh;
4597 abfd = fh->elf.root.u.undef.abfd;
4598 newsym = bfd_make_empty_symbol (abfd);
4599 newsym->name = fh->elf.root.root.string + 1;
4600 newsym->section = bfd_und_section_ptr;
4602 newsym->flags = BSF_WEAK;
4605 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4606 newsym->flags, newsym->section,
4607 newsym->value, NULL, FALSE, FALSE,
4611 fdh = (struct ppc_link_hash_entry *) bh;
4612 fdh->elf.non_elf = 0;
4614 fdh->is_func_descriptor = 1;
4621 /* Fix function descriptor symbols defined in .opd sections to be
4625 ppc64_elf_add_symbol_hook (bfd *ibfd,
4626 struct bfd_link_info *info,
4627 Elf_Internal_Sym *isym,
4628 const char **name ATTRIBUTE_UNUSED,
4629 flagword *flags ATTRIBUTE_UNUSED,
4631 bfd_vma *value ATTRIBUTE_UNUSED)
4633 if ((ibfd->flags & DYNAMIC) == 0
4634 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4635 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4637 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4639 if ((ibfd->flags & DYNAMIC) == 0)
4640 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4642 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4644 else if (*sec != NULL
4645 && strcmp ((*sec)->name, ".opd") == 0)
4646 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4651 /* This function makes an old ABI object reference to ".bar" cause the
4652 inclusion of a new ABI object archive that defines "bar".
4653 NAME is a symbol defined in an archive. Return a symbol in the hash
4654 table that might be satisfied by the archive symbols. */
4656 static struct elf_link_hash_entry *
4657 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4658 struct bfd_link_info *info,
4661 struct elf_link_hash_entry *h;
4665 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4667 /* Don't return this sym if it is a fake function descriptor
4668 created by add_symbol_adjust. */
4669 && !(h->root.type == bfd_link_hash_undefweak
4670 && ((struct ppc_link_hash_entry *) h)->fake))
4676 len = strlen (name);
4677 dot_name = bfd_alloc (abfd, len + 2);
4678 if (dot_name == NULL)
4679 return (struct elf_link_hash_entry *) 0 - 1;
4681 memcpy (dot_name + 1, name, len + 1);
4682 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4683 bfd_release (abfd, dot_name);
4687 /* This function satisfies all old ABI object references to ".bar" if a
4688 new ABI object defines "bar". Well, at least, undefined dot symbols
4689 are made weak. This stops later archive searches from including an
4690 object if we already have a function descriptor definition. It also
4691 prevents the linker complaining about undefined symbols.
4692 We also check and correct mismatched symbol visibility here. The
4693 most restrictive visibility of the function descriptor and the
4694 function entry symbol is used. */
4697 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4699 struct ppc_link_hash_table *htab;
4700 struct ppc_link_hash_entry *fdh;
4702 if (eh->elf.root.type == bfd_link_hash_indirect)
4705 if (eh->elf.root.type == bfd_link_hash_warning)
4706 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4708 if (eh->elf.root.root.string[0] != '.')
4711 htab = ppc_hash_table (info);
4715 fdh = lookup_fdh (eh, htab);
4718 if (!info->relocatable
4719 && (eh->elf.root.type == bfd_link_hash_undefined
4720 || eh->elf.root.type == bfd_link_hash_undefweak)
4721 && eh->elf.ref_regular)
4723 /* Make an undefweak function descriptor sym, which is enough to
4724 pull in an --as-needed shared lib, but won't cause link
4725 errors. Archives are handled elsewhere. */
4726 fdh = make_fdh (info, eh);
4729 fdh->elf.ref_regular = 1;
4734 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4735 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4736 if (entry_vis < descr_vis)
4737 fdh->elf.other += entry_vis - descr_vis;
4738 else if (entry_vis > descr_vis)
4739 eh->elf.other += descr_vis - entry_vis;
4741 if ((fdh->elf.root.type == bfd_link_hash_defined
4742 || fdh->elf.root.type == bfd_link_hash_defweak)
4743 && eh->elf.root.type == bfd_link_hash_undefined)
4745 eh->elf.root.type = bfd_link_hash_undefweak;
4746 eh->was_undefined = 1;
4747 htab->twiddled_syms = 1;
4754 /* Process list of dot-symbols we made in link_hash_newfunc. */
4757 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4759 struct ppc_link_hash_table *htab;
4760 struct ppc_link_hash_entry **p, *eh;
4762 if (!is_ppc64_elf (info->output_bfd))
4764 htab = ppc_hash_table (info);
4768 if (is_ppc64_elf (ibfd))
4770 p = &htab->dot_syms;
4771 while ((eh = *p) != NULL)
4774 if (&eh->elf == htab->elf.hgot)
4776 else if (htab->elf.hgot == NULL
4777 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
4778 htab->elf.hgot = &eh->elf;
4779 else if (!add_symbol_adjust (eh, info))
4781 p = &eh->u.next_dot_sym;
4785 /* Clear the list for non-ppc64 input files. */
4786 p = &htab->dot_syms;
4787 while ((eh = *p) != NULL)
4790 p = &eh->u.next_dot_sym;
4793 /* We need to fix the undefs list for any syms we have twiddled to
4795 if (htab->twiddled_syms)
4797 bfd_link_repair_undef_list (&htab->elf.root);
4798 htab->twiddled_syms = 0;
4803 /* Undo hash table changes when an --as-needed input file is determined
4804 not to be needed. */
4807 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4808 struct bfd_link_info *info)
4810 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4815 htab->dot_syms = NULL;
4819 /* If --just-symbols against a final linked binary, then assume we need
4820 toc adjusting stubs when calling functions defined there. */
4823 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4825 if ((sec->flags & SEC_CODE) != 0
4826 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4827 && is_ppc64_elf (sec->owner))
4829 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4831 && got->size >= elf_backend_got_header_size
4832 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4833 sec->has_toc_reloc = 1;
4835 _bfd_elf_link_just_syms (sec, info);
4838 static struct plt_entry **
4839 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4840 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4842 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4843 struct plt_entry **local_plt;
4844 unsigned char *local_got_tls_masks;
4846 if (local_got_ents == NULL)
4848 bfd_size_type size = symtab_hdr->sh_info;
4850 size *= (sizeof (*local_got_ents)
4851 + sizeof (*local_plt)
4852 + sizeof (*local_got_tls_masks));
4853 local_got_ents = bfd_zalloc (abfd, size);
4854 if (local_got_ents == NULL)
4856 elf_local_got_ents (abfd) = local_got_ents;
4859 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4861 struct got_entry *ent;
4863 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4864 if (ent->addend == r_addend
4865 && ent->owner == abfd
4866 && ent->tls_type == tls_type)
4870 bfd_size_type amt = sizeof (*ent);
4871 ent = bfd_alloc (abfd, amt);
4874 ent->next = local_got_ents[r_symndx];
4875 ent->addend = r_addend;
4877 ent->tls_type = tls_type;
4878 ent->is_indirect = FALSE;
4879 ent->got.refcount = 0;
4880 local_got_ents[r_symndx] = ent;
4882 ent->got.refcount += 1;
4885 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4886 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4887 local_got_tls_masks[r_symndx] |= tls_type;
4889 return local_plt + r_symndx;
4893 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4895 struct plt_entry *ent;
4897 for (ent = *plist; ent != NULL; ent = ent->next)
4898 if (ent->addend == addend)
4902 bfd_size_type amt = sizeof (*ent);
4903 ent = bfd_alloc (abfd, amt);
4907 ent->addend = addend;
4908 ent->plt.refcount = 0;
4911 ent->plt.refcount += 1;
4916 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4918 return (r_type == R_PPC64_REL24
4919 || r_type == R_PPC64_REL14
4920 || r_type == R_PPC64_REL14_BRTAKEN
4921 || r_type == R_PPC64_REL14_BRNTAKEN
4922 || r_type == R_PPC64_ADDR24
4923 || r_type == R_PPC64_ADDR14
4924 || r_type == R_PPC64_ADDR14_BRTAKEN
4925 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4928 /* Look through the relocs for a section during the first phase, and
4929 calculate needed space in the global offset table, procedure
4930 linkage table, and dynamic reloc sections. */
4933 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4934 asection *sec, const Elf_Internal_Rela *relocs)
4936 struct ppc_link_hash_table *htab;
4937 Elf_Internal_Shdr *symtab_hdr;
4938 struct elf_link_hash_entry **sym_hashes;
4939 const Elf_Internal_Rela *rel;
4940 const Elf_Internal_Rela *rel_end;
4942 asection **opd_sym_map;
4943 struct elf_link_hash_entry *tga, *dottga;
4945 if (info->relocatable)
4948 /* Don't do anything special with non-loaded, non-alloced sections.
4949 In particular, any relocs in such sections should not affect GOT
4950 and PLT reference counting (ie. we don't allow them to create GOT
4951 or PLT entries), there's no possibility or desire to optimize TLS
4952 relocs, and there's not much point in propagating relocs to shared
4953 libs that the dynamic linker won't relocate. */
4954 if ((sec->flags & SEC_ALLOC) == 0)
4957 BFD_ASSERT (is_ppc64_elf (abfd));
4959 htab = ppc_hash_table (info);
4963 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4964 FALSE, FALSE, TRUE);
4965 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4966 FALSE, FALSE, TRUE);
4967 symtab_hdr = &elf_symtab_hdr (abfd);
4968 sym_hashes = elf_sym_hashes (abfd);
4971 if (strcmp (sec->name, ".opd") == 0)
4973 /* Garbage collection needs some extra help with .opd sections.
4974 We don't want to necessarily keep everything referenced by
4975 relocs in .opd, as that would keep all functions. Instead,
4976 if we reference an .opd symbol (a function descriptor), we
4977 want to keep the function code symbol's section. This is
4978 easy for global symbols, but for local syms we need to keep
4979 information about the associated function section. */
4982 amt = sec->size * sizeof (*opd_sym_map) / 8;
4983 opd_sym_map = bfd_zalloc (abfd, amt);
4984 if (opd_sym_map == NULL)
4986 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4987 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4988 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4991 rel_end = relocs + sec->reloc_count;
4992 for (rel = relocs; rel < rel_end; rel++)
4994 unsigned long r_symndx;
4995 struct elf_link_hash_entry *h;
4996 enum elf_ppc64_reloc_type r_type;
4998 struct _ppc64_elf_section_data *ppc64_sec;
4999 struct plt_entry **ifunc;
5001 r_symndx = ELF64_R_SYM (rel->r_info);
5002 if (r_symndx < symtab_hdr->sh_info)
5006 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5007 h = elf_follow_link (h);
5009 /* PR15323, ref flags aren't set for references in the same
5011 h->root.non_ir_ref = 1;
5013 if (h == htab->elf.hgot)
5014 sec->has_toc_reloc = 1;
5021 if (h->type == STT_GNU_IFUNC)
5024 ifunc = &h->plt.plist;
5029 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5034 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5036 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5037 rel->r_addend, PLT_IFUNC);
5042 r_type = ELF64_R_TYPE (rel->r_info);
5043 if (is_branch_reloc (r_type))
5045 if (h != NULL && (h == tga || h == dottga))
5048 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5049 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5050 /* We have a new-style __tls_get_addr call with a marker
5054 /* Mark this section as having an old-style call. */
5055 sec->has_tls_get_addr_call = 1;
5058 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5060 && !update_plt_info (abfd, ifunc, rel->r_addend))
5068 /* These special tls relocs tie a call to __tls_get_addr with
5069 its parameter symbol. */
5072 case R_PPC64_GOT_TLSLD16:
5073 case R_PPC64_GOT_TLSLD16_LO:
5074 case R_PPC64_GOT_TLSLD16_HI:
5075 case R_PPC64_GOT_TLSLD16_HA:
5076 tls_type = TLS_TLS | TLS_LD;
5079 case R_PPC64_GOT_TLSGD16:
5080 case R_PPC64_GOT_TLSGD16_LO:
5081 case R_PPC64_GOT_TLSGD16_HI:
5082 case R_PPC64_GOT_TLSGD16_HA:
5083 tls_type = TLS_TLS | TLS_GD;
5086 case R_PPC64_GOT_TPREL16_DS:
5087 case R_PPC64_GOT_TPREL16_LO_DS:
5088 case R_PPC64_GOT_TPREL16_HI:
5089 case R_PPC64_GOT_TPREL16_HA:
5090 if (!info->executable)
5091 info->flags |= DF_STATIC_TLS;
5092 tls_type = TLS_TLS | TLS_TPREL;
5095 case R_PPC64_GOT_DTPREL16_DS:
5096 case R_PPC64_GOT_DTPREL16_LO_DS:
5097 case R_PPC64_GOT_DTPREL16_HI:
5098 case R_PPC64_GOT_DTPREL16_HA:
5099 tls_type = TLS_TLS | TLS_DTPREL;
5101 sec->has_tls_reloc = 1;
5105 case R_PPC64_GOT16_DS:
5106 case R_PPC64_GOT16_HA:
5107 case R_PPC64_GOT16_HI:
5108 case R_PPC64_GOT16_LO:
5109 case R_PPC64_GOT16_LO_DS:
5110 /* This symbol requires a global offset table entry. */
5111 sec->has_toc_reloc = 1;
5112 if (r_type == R_PPC64_GOT_TLSLD16
5113 || r_type == R_PPC64_GOT_TLSGD16
5114 || r_type == R_PPC64_GOT_TPREL16_DS
5115 || r_type == R_PPC64_GOT_DTPREL16_DS
5116 || r_type == R_PPC64_GOT16
5117 || r_type == R_PPC64_GOT16_DS)
5119 htab->do_multi_toc = 1;
5120 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5123 if (ppc64_elf_tdata (abfd)->got == NULL
5124 && !create_got_section (abfd, info))
5129 struct ppc_link_hash_entry *eh;
5130 struct got_entry *ent;
5132 eh = (struct ppc_link_hash_entry *) h;
5133 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5134 if (ent->addend == rel->r_addend
5135 && ent->owner == abfd
5136 && ent->tls_type == tls_type)
5140 bfd_size_type amt = sizeof (*ent);
5141 ent = bfd_alloc (abfd, amt);
5144 ent->next = eh->elf.got.glist;
5145 ent->addend = rel->r_addend;
5147 ent->tls_type = tls_type;
5148 ent->is_indirect = FALSE;
5149 ent->got.refcount = 0;
5150 eh->elf.got.glist = ent;
5152 ent->got.refcount += 1;
5153 eh->tls_mask |= tls_type;
5156 /* This is a global offset table entry for a local symbol. */
5157 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5158 rel->r_addend, tls_type))
5162 case R_PPC64_PLT16_HA:
5163 case R_PPC64_PLT16_HI:
5164 case R_PPC64_PLT16_LO:
5167 /* This symbol requires a procedure linkage table entry. We
5168 actually build the entry in adjust_dynamic_symbol,
5169 because this might be a case of linking PIC code without
5170 linking in any dynamic objects, in which case we don't
5171 need to generate a procedure linkage table after all. */
5174 /* It does not make sense to have a procedure linkage
5175 table entry for a local symbol. */
5176 bfd_set_error (bfd_error_bad_value);
5181 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5184 if (h->root.root.string[0] == '.'
5185 && h->root.root.string[1] != '\0')
5186 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5190 /* The following relocations don't need to propagate the
5191 relocation if linking a shared object since they are
5192 section relative. */
5193 case R_PPC64_SECTOFF:
5194 case R_PPC64_SECTOFF_LO:
5195 case R_PPC64_SECTOFF_HI:
5196 case R_PPC64_SECTOFF_HA:
5197 case R_PPC64_SECTOFF_DS:
5198 case R_PPC64_SECTOFF_LO_DS:
5199 case R_PPC64_DTPREL16:
5200 case R_PPC64_DTPREL16_LO:
5201 case R_PPC64_DTPREL16_HI:
5202 case R_PPC64_DTPREL16_HA:
5203 case R_PPC64_DTPREL16_DS:
5204 case R_PPC64_DTPREL16_LO_DS:
5205 case R_PPC64_DTPREL16_HIGHER:
5206 case R_PPC64_DTPREL16_HIGHERA:
5207 case R_PPC64_DTPREL16_HIGHEST:
5208 case R_PPC64_DTPREL16_HIGHESTA:
5213 case R_PPC64_REL16_LO:
5214 case R_PPC64_REL16_HI:
5215 case R_PPC64_REL16_HA:
5219 case R_PPC64_TOC16_DS:
5220 htab->do_multi_toc = 1;
5221 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5222 case R_PPC64_TOC16_LO:
5223 case R_PPC64_TOC16_HI:
5224 case R_PPC64_TOC16_HA:
5225 case R_PPC64_TOC16_LO_DS:
5226 sec->has_toc_reloc = 1;
5229 /* This relocation describes the C++ object vtable hierarchy.
5230 Reconstruct it for later use during GC. */
5231 case R_PPC64_GNU_VTINHERIT:
5232 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5236 /* This relocation describes which C++ vtable entries are actually
5237 used. Record for later use during GC. */
5238 case R_PPC64_GNU_VTENTRY:
5239 BFD_ASSERT (h != NULL);
5241 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5246 case R_PPC64_REL14_BRTAKEN:
5247 case R_PPC64_REL14_BRNTAKEN:
5249 asection *dest = NULL;
5251 /* Heuristic: If jumping outside our section, chances are
5252 we are going to need a stub. */
5255 /* If the sym is weak it may be overridden later, so
5256 don't assume we know where a weak sym lives. */
5257 if (h->root.type == bfd_link_hash_defined)
5258 dest = h->root.u.def.section;
5262 Elf_Internal_Sym *isym;
5264 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5269 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5273 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5278 if (h != NULL && ifunc == NULL)
5280 /* We may need a .plt entry if the function this reloc
5281 refers to is in a shared lib. */
5282 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5285 if (h->root.root.string[0] == '.'
5286 && h->root.root.string[1] != '\0')
5287 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5288 if (h == tga || h == dottga)
5289 sec->has_tls_reloc = 1;
5293 case R_PPC64_TPREL64:
5294 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5295 if (!info->executable)
5296 info->flags |= DF_STATIC_TLS;
5299 case R_PPC64_DTPMOD64:
5300 if (rel + 1 < rel_end
5301 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5302 && rel[1].r_offset == rel->r_offset + 8)
5303 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5305 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5308 case R_PPC64_DTPREL64:
5309 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5311 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5312 && rel[-1].r_offset == rel->r_offset - 8)
5313 /* This is the second reloc of a dtpmod, dtprel pair.
5314 Don't mark with TLS_DTPREL. */
5318 sec->has_tls_reloc = 1;
5321 struct ppc_link_hash_entry *eh;
5322 eh = (struct ppc_link_hash_entry *) h;
5323 eh->tls_mask |= tls_type;
5326 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5327 rel->r_addend, tls_type))
5330 ppc64_sec = ppc64_elf_section_data (sec);
5331 if (ppc64_sec->sec_type != sec_toc)
5335 /* One extra to simplify get_tls_mask. */
5336 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5337 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5338 if (ppc64_sec->u.toc.symndx == NULL)
5340 amt = sec->size * sizeof (bfd_vma) / 8;
5341 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5342 if (ppc64_sec->u.toc.add == NULL)
5344 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5345 ppc64_sec->sec_type = sec_toc;
5347 BFD_ASSERT (rel->r_offset % 8 == 0);
5348 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5349 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5351 /* Mark the second slot of a GD or LD entry.
5352 -1 to indicate GD and -2 to indicate LD. */
5353 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5354 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5355 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5356 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5359 case R_PPC64_TPREL16:
5360 case R_PPC64_TPREL16_LO:
5361 case R_PPC64_TPREL16_HI:
5362 case R_PPC64_TPREL16_HA:
5363 case R_PPC64_TPREL16_DS:
5364 case R_PPC64_TPREL16_LO_DS:
5365 case R_PPC64_TPREL16_HIGHER:
5366 case R_PPC64_TPREL16_HIGHERA:
5367 case R_PPC64_TPREL16_HIGHEST:
5368 case R_PPC64_TPREL16_HIGHESTA:
5371 if (!info->executable)
5372 info->flags |= DF_STATIC_TLS;
5377 case R_PPC64_ADDR64:
5378 if (opd_sym_map != NULL
5379 && rel + 1 < rel_end
5380 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5384 if (h->root.root.string[0] == '.'
5385 && h->root.root.string[1] != 0
5386 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5389 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5394 Elf_Internal_Sym *isym;
5396 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5401 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5402 if (s != NULL && s != sec)
5403 opd_sym_map[rel->r_offset / 8] = s;
5411 case R_PPC64_ADDR14:
5412 case R_PPC64_ADDR14_BRNTAKEN:
5413 case R_PPC64_ADDR14_BRTAKEN:
5414 case R_PPC64_ADDR16:
5415 case R_PPC64_ADDR16_DS:
5416 case R_PPC64_ADDR16_HA:
5417 case R_PPC64_ADDR16_HI:
5418 case R_PPC64_ADDR16_HIGHER:
5419 case R_PPC64_ADDR16_HIGHERA:
5420 case R_PPC64_ADDR16_HIGHEST:
5421 case R_PPC64_ADDR16_HIGHESTA:
5422 case R_PPC64_ADDR16_LO:
5423 case R_PPC64_ADDR16_LO_DS:
5424 case R_PPC64_ADDR24:
5425 case R_PPC64_ADDR32:
5426 case R_PPC64_UADDR16:
5427 case R_PPC64_UADDR32:
5428 case R_PPC64_UADDR64:
5430 if (h != NULL && !info->shared)
5431 /* We may need a copy reloc. */
5434 /* Don't propagate .opd relocs. */
5435 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5438 /* If we are creating a shared library, and this is a reloc
5439 against a global symbol, or a non PC relative reloc
5440 against a local symbol, then we need to copy the reloc
5441 into the shared library. However, if we are linking with
5442 -Bsymbolic, we do not need to copy a reloc against a
5443 global symbol which is defined in an object we are
5444 including in the link (i.e., DEF_REGULAR is set). At
5445 this point we have not seen all the input files, so it is
5446 possible that DEF_REGULAR is not set now but will be set
5447 later (it is never cleared). In case of a weak definition,
5448 DEF_REGULAR may be cleared later by a strong definition in
5449 a shared library. We account for that possibility below by
5450 storing information in the dyn_relocs field of the hash
5451 table entry. A similar situation occurs when creating
5452 shared libraries and symbol visibility changes render the
5455 If on the other hand, we are creating an executable, we
5456 may need to keep relocations for symbols satisfied by a
5457 dynamic library if we manage to avoid copy relocs for the
5461 && (must_be_dyn_reloc (info, r_type)
5463 && (!SYMBOLIC_BIND (info, h)
5464 || h->root.type == bfd_link_hash_defweak
5465 || !h->def_regular))))
5466 || (ELIMINATE_COPY_RELOCS
5469 && (h->root.type == bfd_link_hash_defweak
5470 || !h->def_regular))
5474 /* We must copy these reloc types into the output file.
5475 Create a reloc section in dynobj and make room for
5479 sreloc = _bfd_elf_make_dynamic_reloc_section
5480 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5486 /* If this is a global symbol, we count the number of
5487 relocations we need for this symbol. */
5490 struct elf_dyn_relocs *p;
5491 struct elf_dyn_relocs **head;
5493 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5495 if (p == NULL || p->sec != sec)
5497 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5507 if (!must_be_dyn_reloc (info, r_type))
5512 /* Track dynamic relocs needed for local syms too.
5513 We really need local syms available to do this
5515 struct ppc_dyn_relocs *p;
5516 struct ppc_dyn_relocs **head;
5517 bfd_boolean is_ifunc;
5520 Elf_Internal_Sym *isym;
5522 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5527 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5531 vpp = &elf_section_data (s)->local_dynrel;
5532 head = (struct ppc_dyn_relocs **) vpp;
5533 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5535 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5537 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5539 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5545 p->ifunc = is_ifunc;
5561 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5562 of the code entry point, and its section. */
5565 opd_entry_value (asection *opd_sec,
5567 asection **code_sec,
5569 bfd_boolean in_code_sec)
5571 bfd *opd_bfd = opd_sec->owner;
5572 Elf_Internal_Rela *relocs;
5573 Elf_Internal_Rela *lo, *hi, *look;
5576 /* No relocs implies we are linking a --just-symbols object, or looking
5577 at a final linked executable with addr2line or somesuch. */
5578 if (opd_sec->reloc_count == 0)
5582 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5583 return (bfd_vma) -1;
5585 val = bfd_get_64 (opd_bfd, buf);
5586 if (code_sec != NULL)
5588 asection *sec, *likely = NULL;
5594 && val < sec->vma + sec->size)
5600 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5602 && (sec->flags & SEC_LOAD) != 0
5603 && (sec->flags & SEC_ALLOC) != 0)
5608 if (code_off != NULL)
5609 *code_off = val - likely->vma;
5615 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5617 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5619 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5621 /* Go find the opd reloc at the sym address. */
5623 BFD_ASSERT (lo != NULL);
5624 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5628 look = lo + (hi - lo) / 2;
5629 if (look->r_offset < offset)
5631 else if (look->r_offset > offset)
5635 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5637 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5638 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5640 unsigned long symndx = ELF64_R_SYM (look->r_info);
5643 if (symndx < symtab_hdr->sh_info
5644 || elf_sym_hashes (opd_bfd) == NULL)
5646 Elf_Internal_Sym *sym;
5648 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5651 size_t symcnt = symtab_hdr->sh_info;
5652 if (elf_sym_hashes (opd_bfd) == NULL)
5653 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5654 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5655 0, NULL, NULL, NULL);
5658 symtab_hdr->contents = (bfd_byte *) sym;
5662 val = sym->st_value;
5663 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5664 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5668 struct elf_link_hash_entry **sym_hashes;
5669 struct elf_link_hash_entry *rh;
5671 sym_hashes = elf_sym_hashes (opd_bfd);
5672 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5675 rh = elf_follow_link (rh);
5676 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5677 || rh->root.type == bfd_link_hash_defweak);
5678 val = rh->root.u.def.value;
5679 sec = rh->root.u.def.section;
5683 /* Handle the odd case where we can be called
5684 during bfd_elf_link_add_symbols before the
5685 symbol hashes have been fully populated. */
5686 Elf_Internal_Sym *sym;
5688 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
5689 symndx, NULL, NULL, NULL);
5693 val = sym->st_value;
5694 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5698 val += look->r_addend;
5699 if (code_off != NULL)
5701 if (code_sec != NULL)
5703 if (in_code_sec && *code_sec != sec)
5708 if (sec != NULL && sec->output_section != NULL)
5709 val += sec->output_section->vma + sec->output_offset;
5718 /* If the ELF symbol SYM might be a function in SEC, return the
5719 function size and set *CODE_OFF to the function's entry point,
5720 otherwise return zero. */
5722 static bfd_size_type
5723 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
5728 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
5729 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
5733 if (!(sym->flags & BSF_SYNTHETIC))
5734 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
5736 if (strcmp (sym->section->name, ".opd") == 0)
5738 if (opd_entry_value (sym->section, sym->value,
5739 &sec, code_off, TRUE) == (bfd_vma) -1)
5741 /* An old ABI binary with dot-syms has a size of 24 on the .opd
5742 symbol. This size has nothing to do with the code size of the
5743 function, which is what we're supposed to return, but the
5744 code size isn't available without looking up the dot-sym.
5745 However, doing that would be a waste of time particularly
5746 since elf_find_function will look at the dot-sym anyway.
5747 Now, elf_find_function will keep the largest size of any
5748 function sym found at the code address of interest, so return
5749 1 here to avoid it incorrectly caching a larger function size
5750 for a small function. This does mean we return the wrong
5751 size for a new-ABI function of size 24, but all that does is
5752 disable caching for such functions. */
5758 if (sym->section != sec)
5760 *code_off = sym->value;
5767 /* Return true if symbol is defined in a regular object file. */
5770 is_static_defined (struct elf_link_hash_entry *h)
5772 return ((h->root.type == bfd_link_hash_defined
5773 || h->root.type == bfd_link_hash_defweak)
5774 && h->root.u.def.section != NULL
5775 && h->root.u.def.section->output_section != NULL);
5778 /* If FDH is a function descriptor symbol, return the associated code
5779 entry symbol if it is defined. Return NULL otherwise. */
5781 static struct ppc_link_hash_entry *
5782 defined_code_entry (struct ppc_link_hash_entry *fdh)
5784 if (fdh->is_func_descriptor)
5786 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5787 if (fh->elf.root.type == bfd_link_hash_defined
5788 || fh->elf.root.type == bfd_link_hash_defweak)
5794 /* If FH is a function code entry symbol, return the associated
5795 function descriptor symbol if it is defined. Return NULL otherwise. */
5797 static struct ppc_link_hash_entry *
5798 defined_func_desc (struct ppc_link_hash_entry *fh)
5801 && fh->oh->is_func_descriptor)
5803 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5804 if (fdh->elf.root.type == bfd_link_hash_defined
5805 || fdh->elf.root.type == bfd_link_hash_defweak)
5811 /* Mark all our entry sym sections, both opd and code section. */
5814 ppc64_elf_gc_keep (struct bfd_link_info *info)
5816 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5817 struct bfd_sym_chain *sym;
5822 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5824 struct ppc_link_hash_entry *eh, *fh;
5827 eh = (struct ppc_link_hash_entry *)
5828 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5831 if (eh->elf.root.type != bfd_link_hash_defined
5832 && eh->elf.root.type != bfd_link_hash_defweak)
5835 fh = defined_code_entry (eh);
5838 sec = fh->elf.root.u.def.section;
5839 sec->flags |= SEC_KEEP;
5841 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5842 && opd_entry_value (eh->elf.root.u.def.section,
5843 eh->elf.root.u.def.value,
5844 &sec, NULL, FALSE) != (bfd_vma) -1)
5845 sec->flags |= SEC_KEEP;
5847 sec = eh->elf.root.u.def.section;
5848 sec->flags |= SEC_KEEP;
5852 /* Mark sections containing dynamically referenced symbols. When
5853 building shared libraries, we must assume that any visible symbol is
5857 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5859 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5860 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5861 struct ppc_link_hash_entry *fdh;
5863 /* Dynamic linking info is on the func descriptor sym. */
5864 fdh = defined_func_desc (eh);
5868 if ((eh->elf.root.type == bfd_link_hash_defined
5869 || eh->elf.root.type == bfd_link_hash_defweak)
5870 && (eh->elf.ref_dynamic
5871 || (!info->executable
5872 && eh->elf.def_regular
5873 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5874 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5875 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5876 || !bfd_hide_sym_by_version (info->version_info,
5877 eh->elf.root.root.string)))))
5880 struct ppc_link_hash_entry *fh;
5882 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5884 /* Function descriptor syms cause the associated
5885 function code sym section to be marked. */
5886 fh = defined_code_entry (eh);
5889 code_sec = fh->elf.root.u.def.section;
5890 code_sec->flags |= SEC_KEEP;
5892 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5893 && opd_entry_value (eh->elf.root.u.def.section,
5894 eh->elf.root.u.def.value,
5895 &code_sec, NULL, FALSE) != (bfd_vma) -1)
5896 code_sec->flags |= SEC_KEEP;
5902 /* Return the section that should be marked against GC for a given
5906 ppc64_elf_gc_mark_hook (asection *sec,
5907 struct bfd_link_info *info,
5908 Elf_Internal_Rela *rel,
5909 struct elf_link_hash_entry *h,
5910 Elf_Internal_Sym *sym)
5914 /* Syms return NULL if we're marking .opd, so we avoid marking all
5915 function sections, as all functions are referenced in .opd. */
5917 if (get_opd_info (sec) != NULL)
5922 enum elf_ppc64_reloc_type r_type;
5923 struct ppc_link_hash_entry *eh, *fh, *fdh;
5925 r_type = ELF64_R_TYPE (rel->r_info);
5928 case R_PPC64_GNU_VTINHERIT:
5929 case R_PPC64_GNU_VTENTRY:
5933 switch (h->root.type)
5935 case bfd_link_hash_defined:
5936 case bfd_link_hash_defweak:
5937 eh = (struct ppc_link_hash_entry *) h;
5938 fdh = defined_func_desc (eh);
5942 /* Function descriptor syms cause the associated
5943 function code sym section to be marked. */
5944 fh = defined_code_entry (eh);
5947 /* They also mark their opd section. */
5948 eh->elf.root.u.def.section->gc_mark = 1;
5950 rsec = fh->elf.root.u.def.section;
5952 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5953 && opd_entry_value (eh->elf.root.u.def.section,
5954 eh->elf.root.u.def.value,
5955 &rsec, NULL, FALSE) != (bfd_vma) -1)
5956 eh->elf.root.u.def.section->gc_mark = 1;
5958 rsec = h->root.u.def.section;
5961 case bfd_link_hash_common:
5962 rsec = h->root.u.c.p->section;
5966 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5972 struct _opd_sec_data *opd;
5974 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5975 opd = get_opd_info (rsec);
5976 if (opd != NULL && opd->func_sec != NULL)
5980 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5987 /* Update the .got, .plt. and dynamic reloc reference counts for the
5988 section being removed. */
5991 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5992 asection *sec, const Elf_Internal_Rela *relocs)
5994 struct ppc_link_hash_table *htab;
5995 Elf_Internal_Shdr *symtab_hdr;
5996 struct elf_link_hash_entry **sym_hashes;
5997 struct got_entry **local_got_ents;
5998 const Elf_Internal_Rela *rel, *relend;
6000 if (info->relocatable)
6003 if ((sec->flags & SEC_ALLOC) == 0)
6006 elf_section_data (sec)->local_dynrel = NULL;
6008 htab = ppc_hash_table (info);
6012 symtab_hdr = &elf_symtab_hdr (abfd);
6013 sym_hashes = elf_sym_hashes (abfd);
6014 local_got_ents = elf_local_got_ents (abfd);
6016 relend = relocs + sec->reloc_count;
6017 for (rel = relocs; rel < relend; rel++)
6019 unsigned long r_symndx;
6020 enum elf_ppc64_reloc_type r_type;
6021 struct elf_link_hash_entry *h = NULL;
6022 unsigned char tls_type = 0;
6024 r_symndx = ELF64_R_SYM (rel->r_info);
6025 r_type = ELF64_R_TYPE (rel->r_info);
6026 if (r_symndx >= symtab_hdr->sh_info)
6028 struct ppc_link_hash_entry *eh;
6029 struct elf_dyn_relocs **pp;
6030 struct elf_dyn_relocs *p;
6032 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6033 h = elf_follow_link (h);
6034 eh = (struct ppc_link_hash_entry *) h;
6036 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6039 /* Everything must go for SEC. */
6045 if (is_branch_reloc (r_type))
6047 struct plt_entry **ifunc = NULL;
6050 if (h->type == STT_GNU_IFUNC)
6051 ifunc = &h->plt.plist;
6053 else if (local_got_ents != NULL)
6055 struct plt_entry **local_plt = (struct plt_entry **)
6056 (local_got_ents + symtab_hdr->sh_info);
6057 unsigned char *local_got_tls_masks = (unsigned char *)
6058 (local_plt + symtab_hdr->sh_info);
6059 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6060 ifunc = local_plt + r_symndx;
6064 struct plt_entry *ent;
6066 for (ent = *ifunc; ent != NULL; ent = ent->next)
6067 if (ent->addend == rel->r_addend)
6071 if (ent->plt.refcount > 0)
6072 ent->plt.refcount -= 1;
6079 case R_PPC64_GOT_TLSLD16:
6080 case R_PPC64_GOT_TLSLD16_LO:
6081 case R_PPC64_GOT_TLSLD16_HI:
6082 case R_PPC64_GOT_TLSLD16_HA:
6083 tls_type = TLS_TLS | TLS_LD;
6086 case R_PPC64_GOT_TLSGD16:
6087 case R_PPC64_GOT_TLSGD16_LO:
6088 case R_PPC64_GOT_TLSGD16_HI:
6089 case R_PPC64_GOT_TLSGD16_HA:
6090 tls_type = TLS_TLS | TLS_GD;
6093 case R_PPC64_GOT_TPREL16_DS:
6094 case R_PPC64_GOT_TPREL16_LO_DS:
6095 case R_PPC64_GOT_TPREL16_HI:
6096 case R_PPC64_GOT_TPREL16_HA:
6097 tls_type = TLS_TLS | TLS_TPREL;
6100 case R_PPC64_GOT_DTPREL16_DS:
6101 case R_PPC64_GOT_DTPREL16_LO_DS:
6102 case R_PPC64_GOT_DTPREL16_HI:
6103 case R_PPC64_GOT_DTPREL16_HA:
6104 tls_type = TLS_TLS | TLS_DTPREL;
6108 case R_PPC64_GOT16_DS:
6109 case R_PPC64_GOT16_HA:
6110 case R_PPC64_GOT16_HI:
6111 case R_PPC64_GOT16_LO:
6112 case R_PPC64_GOT16_LO_DS:
6115 struct got_entry *ent;
6120 ent = local_got_ents[r_symndx];
6122 for (; ent != NULL; ent = ent->next)
6123 if (ent->addend == rel->r_addend
6124 && ent->owner == abfd
6125 && ent->tls_type == tls_type)
6129 if (ent->got.refcount > 0)
6130 ent->got.refcount -= 1;
6134 case R_PPC64_PLT16_HA:
6135 case R_PPC64_PLT16_HI:
6136 case R_PPC64_PLT16_LO:
6140 case R_PPC64_REL14_BRNTAKEN:
6141 case R_PPC64_REL14_BRTAKEN:
6145 struct plt_entry *ent;
6147 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6148 if (ent->addend == rel->r_addend)
6150 if (ent != NULL && ent->plt.refcount > 0)
6151 ent->plt.refcount -= 1;
6162 /* The maximum size of .sfpr. */
6163 #define SFPR_MAX (218*4)
6165 struct sfpr_def_parms
6167 const char name[12];
6168 unsigned char lo, hi;
6169 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6170 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6173 /* Auto-generate _save*, _rest* functions in .sfpr. */
6176 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6178 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6180 size_t len = strlen (parm->name);
6181 bfd_boolean writing = FALSE;
6187 memcpy (sym, parm->name, len);
6190 for (i = parm->lo; i <= parm->hi; i++)
6192 struct elf_link_hash_entry *h;
6194 sym[len + 0] = i / 10 + '0';
6195 sym[len + 1] = i % 10 + '0';
6196 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6200 h->root.type = bfd_link_hash_defined;
6201 h->root.u.def.section = htab->sfpr;
6202 h->root.u.def.value = htab->sfpr->size;
6205 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6207 if (htab->sfpr->contents == NULL)
6209 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6210 if (htab->sfpr->contents == NULL)
6216 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6218 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6220 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6221 htab->sfpr->size = p - htab->sfpr->contents;
6229 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6231 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6236 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6238 p = savegpr0 (abfd, p, r);
6239 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6241 bfd_put_32 (abfd, BLR, p);
6246 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6248 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6253 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6255 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6257 p = restgpr0 (abfd, p, r);
6258 bfd_put_32 (abfd, MTLR_R0, p);
6262 p = restgpr0 (abfd, p, 30);
6263 p = restgpr0 (abfd, p, 31);
6265 bfd_put_32 (abfd, BLR, p);
6270 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6272 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6277 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6279 p = savegpr1 (abfd, p, r);
6280 bfd_put_32 (abfd, BLR, p);
6285 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6287 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6292 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6294 p = restgpr1 (abfd, p, r);
6295 bfd_put_32 (abfd, BLR, p);
6300 savefpr (bfd *abfd, bfd_byte *p, int r)
6302 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6307 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6309 p = savefpr (abfd, p, r);
6310 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6312 bfd_put_32 (abfd, BLR, p);
6317 restfpr (bfd *abfd, bfd_byte *p, int r)
6319 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6324 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6326 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6328 p = restfpr (abfd, p, r);
6329 bfd_put_32 (abfd, MTLR_R0, p);
6333 p = restfpr (abfd, p, 30);
6334 p = restfpr (abfd, p, 31);
6336 bfd_put_32 (abfd, BLR, p);
6341 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6343 p = savefpr (abfd, p, r);
6344 bfd_put_32 (abfd, BLR, p);
6349 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6351 p = restfpr (abfd, p, r);
6352 bfd_put_32 (abfd, BLR, p);
6357 savevr (bfd *abfd, bfd_byte *p, int r)
6359 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6361 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6366 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6368 p = savevr (abfd, p, r);
6369 bfd_put_32 (abfd, BLR, p);
6374 restvr (bfd *abfd, bfd_byte *p, int r)
6376 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6378 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6383 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6385 p = restvr (abfd, p, r);
6386 bfd_put_32 (abfd, BLR, p);
6390 /* Called via elf_link_hash_traverse to transfer dynamic linking
6391 information on function code symbol entries to their corresponding
6392 function descriptor symbol entries. */
6395 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6397 struct bfd_link_info *info;
6398 struct ppc_link_hash_table *htab;
6399 struct plt_entry *ent;
6400 struct ppc_link_hash_entry *fh;
6401 struct ppc_link_hash_entry *fdh;
6402 bfd_boolean force_local;
6404 fh = (struct ppc_link_hash_entry *) h;
6405 if (fh->elf.root.type == bfd_link_hash_indirect)
6409 htab = ppc_hash_table (info);
6413 /* Resolve undefined references to dot-symbols as the value
6414 in the function descriptor, if we have one in a regular object.
6415 This is to satisfy cases like ".quad .foo". Calls to functions
6416 in dynamic objects are handled elsewhere. */
6417 if (fh->elf.root.type == bfd_link_hash_undefweak
6418 && fh->was_undefined
6419 && (fdh = defined_func_desc (fh)) != NULL
6420 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6421 && opd_entry_value (fdh->elf.root.u.def.section,
6422 fdh->elf.root.u.def.value,
6423 &fh->elf.root.u.def.section,
6424 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6426 fh->elf.root.type = fdh->elf.root.type;
6427 fh->elf.forced_local = 1;
6428 fh->elf.def_regular = fdh->elf.def_regular;
6429 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6432 /* If this is a function code symbol, transfer dynamic linking
6433 information to the function descriptor symbol. */
6437 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6438 if (ent->plt.refcount > 0)
6441 || fh->elf.root.root.string[0] != '.'
6442 || fh->elf.root.root.string[1] == '\0')
6445 /* Find the corresponding function descriptor symbol. Create it
6446 as undefined if necessary. */
6448 fdh = lookup_fdh (fh, htab);
6450 && !info->executable
6451 && (fh->elf.root.type == bfd_link_hash_undefined
6452 || fh->elf.root.type == bfd_link_hash_undefweak))
6454 fdh = make_fdh (info, fh);
6459 /* Fake function descriptors are made undefweak. If the function
6460 code symbol is strong undefined, make the fake sym the same.
6461 If the function code symbol is defined, then force the fake
6462 descriptor local; We can't support overriding of symbols in a
6463 shared library on a fake descriptor. */
6467 && fdh->elf.root.type == bfd_link_hash_undefweak)
6469 if (fh->elf.root.type == bfd_link_hash_undefined)
6471 fdh->elf.root.type = bfd_link_hash_undefined;
6472 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6474 else if (fh->elf.root.type == bfd_link_hash_defined
6475 || fh->elf.root.type == bfd_link_hash_defweak)
6477 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6482 && !fdh->elf.forced_local
6483 && (!info->executable
6484 || fdh->elf.def_dynamic
6485 || fdh->elf.ref_dynamic
6486 || (fdh->elf.root.type == bfd_link_hash_undefweak
6487 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6489 if (fdh->elf.dynindx == -1)
6490 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6492 fdh->elf.ref_regular |= fh->elf.ref_regular;
6493 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6494 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6495 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6496 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6498 move_plt_plist (fh, fdh);
6499 fdh->elf.needs_plt = 1;
6501 fdh->is_func_descriptor = 1;
6506 /* Now that the info is on the function descriptor, clear the
6507 function code sym info. Any function code syms for which we
6508 don't have a definition in a regular file, we force local.
6509 This prevents a shared library from exporting syms that have
6510 been imported from another library. Function code syms that
6511 are really in the library we must leave global to prevent the
6512 linker dragging in a definition from a static library. */
6513 force_local = (!fh->elf.def_regular
6515 || !fdh->elf.def_regular
6516 || fdh->elf.forced_local);
6517 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6522 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6523 this hook to a) provide some gcc support functions, and b) transfer
6524 dynamic linking information gathered so far on function code symbol
6525 entries, to their corresponding function descriptor symbol entries. */
6528 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6529 struct bfd_link_info *info)
6531 struct ppc_link_hash_table *htab;
6533 static const struct sfpr_def_parms funcs[] =
6535 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6536 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6537 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6538 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6539 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6540 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6541 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6542 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6543 { "._savef", 14, 31, savefpr, savefpr1_tail },
6544 { "._restf", 14, 31, restfpr, restfpr1_tail },
6545 { "_savevr_", 20, 31, savevr, savevr_tail },
6546 { "_restvr_", 20, 31, restvr, restvr_tail }
6549 htab = ppc_hash_table (info);
6553 if (htab->elf.hgot != NULL)
6555 htab->elf.hgot->root.type = bfd_link_hash_new;
6556 htab->elf.hgot->type = STT_OBJECT;
6557 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6560 if (htab->sfpr == NULL)
6561 /* We don't have any relocs. */
6564 /* Provide any missing _save* and _rest* functions. */
6565 htab->sfpr->size = 0;
6566 if (!info->relocatable)
6567 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6568 if (!sfpr_define (info, &funcs[i]))
6571 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6573 if (htab->sfpr->size == 0)
6574 htab->sfpr->flags |= SEC_EXCLUDE;
6579 /* Adjust a symbol defined by a dynamic object and referenced by a
6580 regular object. The current definition is in some section of the
6581 dynamic object, but we're not including those sections. We have to
6582 change the definition to something the rest of the link can
6586 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6587 struct elf_link_hash_entry *h)
6589 struct ppc_link_hash_table *htab;
6592 htab = ppc_hash_table (info);
6596 /* Deal with function syms. */
6597 if (h->type == STT_FUNC
6598 || h->type == STT_GNU_IFUNC
6601 /* Clear procedure linkage table information for any symbol that
6602 won't need a .plt entry. */
6603 struct plt_entry *ent;
6604 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6605 if (ent->plt.refcount > 0)
6608 || (h->type != STT_GNU_IFUNC
6609 && (SYMBOL_CALLS_LOCAL (info, h)
6610 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6611 && h->root.type == bfd_link_hash_undefweak))))
6613 h->plt.plist = NULL;
6618 h->plt.plist = NULL;
6620 /* If this is a weak symbol, and there is a real definition, the
6621 processor independent code will have arranged for us to see the
6622 real definition first, and we can just use the same value. */
6623 if (h->u.weakdef != NULL)
6625 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6626 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6627 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6628 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6629 if (ELIMINATE_COPY_RELOCS)
6630 h->non_got_ref = h->u.weakdef->non_got_ref;
6634 /* If we are creating a shared library, we must presume that the
6635 only references to the symbol are via the global offset table.
6636 For such cases we need not do anything here; the relocations will
6637 be handled correctly by relocate_section. */
6641 /* If there are no references to this symbol that do not use the
6642 GOT, we don't need to generate a copy reloc. */
6643 if (!h->non_got_ref)
6646 /* Don't generate a copy reloc for symbols defined in the executable. */
6647 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6650 if (ELIMINATE_COPY_RELOCS)
6652 struct ppc_link_hash_entry * eh;
6653 struct elf_dyn_relocs *p;
6655 eh = (struct ppc_link_hash_entry *) h;
6656 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6658 s = p->sec->output_section;
6659 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6663 /* If we didn't find any dynamic relocs in read-only sections, then
6664 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6672 if (h->plt.plist != NULL)
6674 /* We should never get here, but unfortunately there are versions
6675 of gcc out there that improperly (for this ABI) put initialized
6676 function pointers, vtable refs and suchlike in read-only
6677 sections. Allow them to proceed, but warn that this might
6678 break at runtime. */
6679 info->callbacks->einfo
6680 (_("%P: copy reloc against `%T' requires lazy plt linking; "
6681 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6682 h->root.root.string);
6685 /* This is a reference to a symbol defined by a dynamic object which
6686 is not a function. */
6688 /* We must allocate the symbol in our .dynbss section, which will
6689 become part of the .bss section of the executable. There will be
6690 an entry for this symbol in the .dynsym section. The dynamic
6691 object will contain position independent code, so all references
6692 from the dynamic object to this symbol will go through the global
6693 offset table. The dynamic linker will use the .dynsym entry to
6694 determine the address it must put in the global offset table, so
6695 both the dynamic object and the regular object will refer to the
6696 same memory location for the variable. */
6698 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6699 to copy the initial value out of the dynamic object and into the
6700 runtime process image. We need to remember the offset into the
6701 .rela.bss section we are going to use. */
6702 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6704 htab->relbss->size += sizeof (Elf64_External_Rela);
6710 return _bfd_elf_adjust_dynamic_copy (h, s);
6713 /* If given a function descriptor symbol, hide both the function code
6714 sym and the descriptor. */
6716 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6717 struct elf_link_hash_entry *h,
6718 bfd_boolean force_local)
6720 struct ppc_link_hash_entry *eh;
6721 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6723 eh = (struct ppc_link_hash_entry *) h;
6724 if (eh->is_func_descriptor)
6726 struct ppc_link_hash_entry *fh = eh->oh;
6731 struct ppc_link_hash_table *htab;
6734 /* We aren't supposed to use alloca in BFD because on
6735 systems which do not have alloca the version in libiberty
6736 calls xmalloc, which might cause the program to crash
6737 when it runs out of memory. This function doesn't have a
6738 return status, so there's no way to gracefully return an
6739 error. So cheat. We know that string[-1] can be safely
6740 accessed; It's either a string in an ELF string table,
6741 or allocated in an objalloc structure. */
6743 p = eh->elf.root.root.string - 1;
6746 htab = ppc_hash_table (info);
6750 fh = (struct ppc_link_hash_entry *)
6751 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6754 /* Unfortunately, if it so happens that the string we were
6755 looking for was allocated immediately before this string,
6756 then we overwrote the string terminator. That's the only
6757 reason the lookup should fail. */
6760 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6761 while (q >= eh->elf.root.root.string && *q == *p)
6763 if (q < eh->elf.root.root.string && *p == '.')
6764 fh = (struct ppc_link_hash_entry *)
6765 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6774 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6779 get_sym_h (struct elf_link_hash_entry **hp,
6780 Elf_Internal_Sym **symp,
6782 unsigned char **tls_maskp,
6783 Elf_Internal_Sym **locsymsp,
6784 unsigned long r_symndx,
6787 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6789 if (r_symndx >= symtab_hdr->sh_info)
6791 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6792 struct elf_link_hash_entry *h;
6794 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6795 h = elf_follow_link (h);
6803 if (symsecp != NULL)
6805 asection *symsec = NULL;
6806 if (h->root.type == bfd_link_hash_defined
6807 || h->root.type == bfd_link_hash_defweak)
6808 symsec = h->root.u.def.section;
6812 if (tls_maskp != NULL)
6814 struct ppc_link_hash_entry *eh;
6816 eh = (struct ppc_link_hash_entry *) h;
6817 *tls_maskp = &eh->tls_mask;
6822 Elf_Internal_Sym *sym;
6823 Elf_Internal_Sym *locsyms = *locsymsp;
6825 if (locsyms == NULL)
6827 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6828 if (locsyms == NULL)
6829 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6830 symtab_hdr->sh_info,
6831 0, NULL, NULL, NULL);
6832 if (locsyms == NULL)
6834 *locsymsp = locsyms;
6836 sym = locsyms + r_symndx;
6844 if (symsecp != NULL)
6845 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6847 if (tls_maskp != NULL)
6849 struct got_entry **lgot_ents;
6850 unsigned char *tls_mask;
6853 lgot_ents = elf_local_got_ents (ibfd);
6854 if (lgot_ents != NULL)
6856 struct plt_entry **local_plt = (struct plt_entry **)
6857 (lgot_ents + symtab_hdr->sh_info);
6858 unsigned char *lgot_masks = (unsigned char *)
6859 (local_plt + symtab_hdr->sh_info);
6860 tls_mask = &lgot_masks[r_symndx];
6862 *tls_maskp = tls_mask;
6868 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6869 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6870 type suitable for optimization, and 1 otherwise. */
6873 get_tls_mask (unsigned char **tls_maskp,
6874 unsigned long *toc_symndx,
6875 bfd_vma *toc_addend,
6876 Elf_Internal_Sym **locsymsp,
6877 const Elf_Internal_Rela *rel,
6880 unsigned long r_symndx;
6882 struct elf_link_hash_entry *h;
6883 Elf_Internal_Sym *sym;
6887 r_symndx = ELF64_R_SYM (rel->r_info);
6888 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6891 if ((*tls_maskp != NULL && **tls_maskp != 0)
6893 || ppc64_elf_section_data (sec) == NULL
6894 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6897 /* Look inside a TOC section too. */
6900 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6901 off = h->root.u.def.value;
6904 off = sym->st_value;
6905 off += rel->r_addend;
6906 BFD_ASSERT (off % 8 == 0);
6907 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6908 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6909 if (toc_symndx != NULL)
6910 *toc_symndx = r_symndx;
6911 if (toc_addend != NULL)
6912 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6913 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6915 if ((h == NULL || is_static_defined (h))
6916 && (next_r == -1 || next_r == -2))
6921 /* Find (or create) an entry in the tocsave hash table. */
6923 static struct tocsave_entry *
6924 tocsave_find (struct ppc_link_hash_table *htab,
6925 enum insert_option insert,
6926 Elf_Internal_Sym **local_syms,
6927 const Elf_Internal_Rela *irela,
6930 unsigned long r_indx;
6931 struct elf_link_hash_entry *h;
6932 Elf_Internal_Sym *sym;
6933 struct tocsave_entry ent, *p;
6935 struct tocsave_entry **slot;
6937 r_indx = ELF64_R_SYM (irela->r_info);
6938 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6940 if (ent.sec == NULL || ent.sec->output_section == NULL)
6942 (*_bfd_error_handler)
6943 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6948 ent.offset = h->root.u.def.value;
6950 ent.offset = sym->st_value;
6951 ent.offset += irela->r_addend;
6953 hash = tocsave_htab_hash (&ent);
6954 slot = ((struct tocsave_entry **)
6955 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6961 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6970 /* Adjust all global syms defined in opd sections. In gcc generated
6971 code for the old ABI, these will already have been done. */
6974 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6976 struct ppc_link_hash_entry *eh;
6978 struct _opd_sec_data *opd;
6980 if (h->root.type == bfd_link_hash_indirect)
6983 if (h->root.type != bfd_link_hash_defined
6984 && h->root.type != bfd_link_hash_defweak)
6987 eh = (struct ppc_link_hash_entry *) h;
6988 if (eh->adjust_done)
6991 sym_sec = eh->elf.root.u.def.section;
6992 opd = get_opd_info (sym_sec);
6993 if (opd != NULL && opd->adjust != NULL)
6995 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6998 /* This entry has been deleted. */
6999 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7002 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7003 if (discarded_section (dsec))
7005 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7009 eh->elf.root.u.def.value = 0;
7010 eh->elf.root.u.def.section = dsec;
7013 eh->elf.root.u.def.value += adjust;
7014 eh->adjust_done = 1;
7019 /* Handles decrementing dynamic reloc counts for the reloc specified by
7020 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7021 have already been determined. */
7024 dec_dynrel_count (bfd_vma r_info,
7026 struct bfd_link_info *info,
7027 Elf_Internal_Sym **local_syms,
7028 struct elf_link_hash_entry *h,
7029 Elf_Internal_Sym *sym)
7031 enum elf_ppc64_reloc_type r_type;
7032 asection *sym_sec = NULL;
7034 /* Can this reloc be dynamic? This switch, and later tests here
7035 should be kept in sync with the code in check_relocs. */
7036 r_type = ELF64_R_TYPE (r_info);
7042 case R_PPC64_TPREL16:
7043 case R_PPC64_TPREL16_LO:
7044 case R_PPC64_TPREL16_HI:
7045 case R_PPC64_TPREL16_HA:
7046 case R_PPC64_TPREL16_DS:
7047 case R_PPC64_TPREL16_LO_DS:
7048 case R_PPC64_TPREL16_HIGHER:
7049 case R_PPC64_TPREL16_HIGHERA:
7050 case R_PPC64_TPREL16_HIGHEST:
7051 case R_PPC64_TPREL16_HIGHESTA:
7055 case R_PPC64_TPREL64:
7056 case R_PPC64_DTPMOD64:
7057 case R_PPC64_DTPREL64:
7058 case R_PPC64_ADDR64:
7062 case R_PPC64_ADDR14:
7063 case R_PPC64_ADDR14_BRNTAKEN:
7064 case R_PPC64_ADDR14_BRTAKEN:
7065 case R_PPC64_ADDR16:
7066 case R_PPC64_ADDR16_DS:
7067 case R_PPC64_ADDR16_HA:
7068 case R_PPC64_ADDR16_HI:
7069 case R_PPC64_ADDR16_HIGHER:
7070 case R_PPC64_ADDR16_HIGHERA:
7071 case R_PPC64_ADDR16_HIGHEST:
7072 case R_PPC64_ADDR16_HIGHESTA:
7073 case R_PPC64_ADDR16_LO:
7074 case R_PPC64_ADDR16_LO_DS:
7075 case R_PPC64_ADDR24:
7076 case R_PPC64_ADDR32:
7077 case R_PPC64_UADDR16:
7078 case R_PPC64_UADDR32:
7079 case R_PPC64_UADDR64:
7084 if (local_syms != NULL)
7086 unsigned long r_symndx;
7087 bfd *ibfd = sec->owner;
7089 r_symndx = ELF64_R_SYM (r_info);
7090 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7095 && (must_be_dyn_reloc (info, r_type)
7097 && (!SYMBOLIC_BIND (info, h)
7098 || h->root.type == bfd_link_hash_defweak
7099 || !h->def_regular))))
7100 || (ELIMINATE_COPY_RELOCS
7103 && (h->root.type == bfd_link_hash_defweak
7104 || !h->def_regular)))
7111 struct elf_dyn_relocs *p;
7112 struct elf_dyn_relocs **pp;
7113 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7115 /* elf_gc_sweep may have already removed all dyn relocs associated
7116 with local syms for a given section. Also, symbol flags are
7117 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7118 report a dynreloc miscount. */
7119 if (*pp == NULL && info->gc_sections)
7122 while ((p = *pp) != NULL)
7126 if (!must_be_dyn_reloc (info, r_type))
7138 struct ppc_dyn_relocs *p;
7139 struct ppc_dyn_relocs **pp;
7141 bfd_boolean is_ifunc;
7143 if (local_syms == NULL)
7144 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7145 if (sym_sec == NULL)
7148 vpp = &elf_section_data (sym_sec)->local_dynrel;
7149 pp = (struct ppc_dyn_relocs **) vpp;
7151 if (*pp == NULL && info->gc_sections)
7154 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7155 while ((p = *pp) != NULL)
7157 if (p->sec == sec && p->ifunc == is_ifunc)
7168 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7170 bfd_set_error (bfd_error_bad_value);
7174 /* Remove unused Official Procedure Descriptor entries. Currently we
7175 only remove those associated with functions in discarded link-once
7176 sections, or weakly defined functions that have been overridden. It
7177 would be possible to remove many more entries for statically linked
7181 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7184 bfd_boolean some_edited = FALSE;
7185 asection *need_pad = NULL;
7187 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7190 Elf_Internal_Rela *relstart, *rel, *relend;
7191 Elf_Internal_Shdr *symtab_hdr;
7192 Elf_Internal_Sym *local_syms;
7194 struct _opd_sec_data *opd;
7195 bfd_boolean need_edit, add_aux_fields;
7196 bfd_size_type cnt_16b = 0;
7198 if (!is_ppc64_elf (ibfd))
7201 sec = bfd_get_section_by_name (ibfd, ".opd");
7202 if (sec == NULL || sec->size == 0)
7205 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7208 if (sec->output_section == bfd_abs_section_ptr)
7211 /* Look through the section relocs. */
7212 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7216 symtab_hdr = &elf_symtab_hdr (ibfd);
7218 /* Read the relocations. */
7219 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7221 if (relstart == NULL)
7224 /* First run through the relocs to check they are sane, and to
7225 determine whether we need to edit this opd section. */
7229 relend = relstart + sec->reloc_count;
7230 for (rel = relstart; rel < relend; )
7232 enum elf_ppc64_reloc_type r_type;
7233 unsigned long r_symndx;
7235 struct elf_link_hash_entry *h;
7236 Elf_Internal_Sym *sym;
7238 /* .opd contains a regular array of 16 or 24 byte entries. We're
7239 only interested in the reloc pointing to a function entry
7241 if (rel->r_offset != offset
7242 || rel + 1 >= relend
7243 || (rel + 1)->r_offset != offset + 8)
7245 /* If someone messes with .opd alignment then after a
7246 "ld -r" we might have padding in the middle of .opd.
7247 Also, there's nothing to prevent someone putting
7248 something silly in .opd with the assembler. No .opd
7249 optimization for them! */
7251 (*_bfd_error_handler)
7252 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7257 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7258 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7260 (*_bfd_error_handler)
7261 (_("%B: unexpected reloc type %u in .opd section"),
7267 r_symndx = ELF64_R_SYM (rel->r_info);
7268 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7272 if (sym_sec == NULL || sym_sec->owner == NULL)
7274 const char *sym_name;
7276 sym_name = h->root.root.string;
7278 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7281 (*_bfd_error_handler)
7282 (_("%B: undefined sym `%s' in .opd section"),
7288 /* opd entries are always for functions defined in the
7289 current input bfd. If the symbol isn't defined in the
7290 input bfd, then we won't be using the function in this
7291 bfd; It must be defined in a linkonce section in another
7292 bfd, or is weak. It's also possible that we are
7293 discarding the function due to a linker script /DISCARD/,
7294 which we test for via the output_section. */
7295 if (sym_sec->owner != ibfd
7296 || sym_sec->output_section == bfd_abs_section_ptr)
7301 || (rel + 1 == relend && rel->r_offset == offset + 16))
7303 if (sec->size == offset + 24)
7308 if (rel == relend && sec->size == offset + 16)
7316 if (rel->r_offset == offset + 24)
7318 else if (rel->r_offset != offset + 16)
7320 else if (rel + 1 < relend
7321 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7322 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7327 else if (rel + 2 < relend
7328 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7329 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7338 add_aux_fields = non_overlapping && cnt_16b > 0;
7340 if (need_edit || add_aux_fields)
7342 Elf_Internal_Rela *write_rel;
7343 Elf_Internal_Shdr *rel_hdr;
7344 bfd_byte *rptr, *wptr;
7345 bfd_byte *new_contents;
7350 new_contents = NULL;
7351 amt = sec->size * sizeof (long) / 8;
7352 opd = &ppc64_elf_section_data (sec)->u.opd;
7353 opd->adjust = bfd_zalloc (sec->owner, amt);
7354 if (opd->adjust == NULL)
7356 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7358 /* This seems a waste of time as input .opd sections are all
7359 zeros as generated by gcc, but I suppose there's no reason
7360 this will always be so. We might start putting something in
7361 the third word of .opd entries. */
7362 if ((sec->flags & SEC_IN_MEMORY) == 0)
7365 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7370 if (local_syms != NULL
7371 && symtab_hdr->contents != (unsigned char *) local_syms)
7373 if (elf_section_data (sec)->relocs != relstart)
7377 sec->contents = loc;
7378 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7381 elf_section_data (sec)->relocs = relstart;
7383 new_contents = sec->contents;
7386 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7387 if (new_contents == NULL)
7391 wptr = new_contents;
7392 rptr = sec->contents;
7394 write_rel = relstart;
7398 for (rel = relstart; rel < relend; rel++)
7400 unsigned long r_symndx;
7402 struct elf_link_hash_entry *h;
7403 Elf_Internal_Sym *sym;
7405 r_symndx = ELF64_R_SYM (rel->r_info);
7406 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7410 if (rel->r_offset == offset)
7412 struct ppc_link_hash_entry *fdh = NULL;
7414 /* See if the .opd entry is full 24 byte or
7415 16 byte (with fd_aux entry overlapped with next
7418 if ((rel + 2 == relend && sec->size == offset + 16)
7419 || (rel + 3 < relend
7420 && rel[2].r_offset == offset + 16
7421 && rel[3].r_offset == offset + 24
7422 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7423 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7427 && h->root.root.string[0] == '.')
7429 struct ppc_link_hash_table *htab;
7431 htab = ppc_hash_table (info);
7433 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7436 && fdh->elf.root.type != bfd_link_hash_defined
7437 && fdh->elf.root.type != bfd_link_hash_defweak)
7441 skip = (sym_sec->owner != ibfd
7442 || sym_sec->output_section == bfd_abs_section_ptr);
7445 if (fdh != NULL && sym_sec->owner == ibfd)
7447 /* Arrange for the function descriptor sym
7449 fdh->elf.root.u.def.value = 0;
7450 fdh->elf.root.u.def.section = sym_sec;
7452 opd->adjust[rel->r_offset / 8] = -1;
7456 /* We'll be keeping this opd entry. */
7460 /* Redefine the function descriptor symbol to
7461 this location in the opd section. It is
7462 necessary to update the value here rather
7463 than using an array of adjustments as we do
7464 for local symbols, because various places
7465 in the generic ELF code use the value
7466 stored in u.def.value. */
7467 fdh->elf.root.u.def.value = wptr - new_contents;
7468 fdh->adjust_done = 1;
7471 /* Local syms are a bit tricky. We could
7472 tweak them as they can be cached, but
7473 we'd need to look through the local syms
7474 for the function descriptor sym which we
7475 don't have at the moment. So keep an
7476 array of adjustments. */
7477 opd->adjust[rel->r_offset / 8]
7478 = (wptr - new_contents) - (rptr - sec->contents);
7481 memcpy (wptr, rptr, opd_ent_size);
7482 wptr += opd_ent_size;
7483 if (add_aux_fields && opd_ent_size == 16)
7485 memset (wptr, '\0', 8);
7489 rptr += opd_ent_size;
7490 offset += opd_ent_size;
7496 && !info->relocatable
7497 && !dec_dynrel_count (rel->r_info, sec, info,
7503 /* We need to adjust any reloc offsets to point to the
7504 new opd entries. While we're at it, we may as well
7505 remove redundant relocs. */
7506 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7507 if (write_rel != rel)
7508 memcpy (write_rel, rel, sizeof (*rel));
7513 sec->size = wptr - new_contents;
7514 sec->reloc_count = write_rel - relstart;
7517 free (sec->contents);
7518 sec->contents = new_contents;
7521 /* Fudge the header size too, as this is used later in
7522 elf_bfd_final_link if we are emitting relocs. */
7523 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7524 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7527 else if (elf_section_data (sec)->relocs != relstart)
7530 if (local_syms != NULL
7531 && symtab_hdr->contents != (unsigned char *) local_syms)
7533 if (!info->keep_memory)
7536 symtab_hdr->contents = (unsigned char *) local_syms;
7541 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7543 /* If we are doing a final link and the last .opd entry is just 16 byte
7544 long, add a 8 byte padding after it. */
7545 if (need_pad != NULL && !info->relocatable)
7549 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7551 BFD_ASSERT (need_pad->size > 0);
7553 p = bfd_malloc (need_pad->size + 8);
7557 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7558 p, 0, need_pad->size))
7561 need_pad->contents = p;
7562 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7566 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7570 need_pad->contents = p;
7573 memset (need_pad->contents + need_pad->size, 0, 8);
7574 need_pad->size += 8;
7580 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7583 ppc64_elf_tls_setup (struct bfd_link_info *info,
7584 int no_tls_get_addr_opt,
7587 struct ppc_link_hash_table *htab;
7589 htab = ppc_hash_table (info);
7594 htab->do_multi_toc = 0;
7595 else if (!htab->do_multi_toc)
7598 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7599 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7600 FALSE, FALSE, TRUE));
7601 /* Move dynamic linking info to the function descriptor sym. */
7602 if (htab->tls_get_addr != NULL)
7603 func_desc_adjust (&htab->tls_get_addr->elf, info);
7604 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7605 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7606 FALSE, FALSE, TRUE));
7607 if (!no_tls_get_addr_opt)
7609 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7611 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7612 FALSE, FALSE, TRUE);
7614 func_desc_adjust (opt, info);
7615 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7616 FALSE, FALSE, TRUE);
7618 && (opt_fd->root.type == bfd_link_hash_defined
7619 || opt_fd->root.type == bfd_link_hash_defweak))
7621 /* If glibc supports an optimized __tls_get_addr call stub,
7622 signalled by the presence of __tls_get_addr_opt, and we'll
7623 be calling __tls_get_addr via a plt call stub, then
7624 make __tls_get_addr point to __tls_get_addr_opt. */
7625 tga_fd = &htab->tls_get_addr_fd->elf;
7626 if (htab->elf.dynamic_sections_created
7628 && (tga_fd->type == STT_FUNC
7629 || tga_fd->needs_plt)
7630 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7631 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7632 && tga_fd->root.type == bfd_link_hash_undefweak)))
7634 struct plt_entry *ent;
7636 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7637 if (ent->plt.refcount > 0)
7641 tga_fd->root.type = bfd_link_hash_indirect;
7642 tga_fd->root.u.i.link = &opt_fd->root;
7643 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7644 if (opt_fd->dynindx != -1)
7646 /* Use __tls_get_addr_opt in dynamic relocations. */
7647 opt_fd->dynindx = -1;
7648 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7649 opt_fd->dynstr_index);
7650 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7653 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7654 tga = &htab->tls_get_addr->elf;
7655 if (opt != NULL && tga != NULL)
7657 tga->root.type = bfd_link_hash_indirect;
7658 tga->root.u.i.link = &opt->root;
7659 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7660 _bfd_elf_link_hash_hide_symbol (info, opt,
7662 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7664 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7665 htab->tls_get_addr_fd->is_func_descriptor = 1;
7666 if (htab->tls_get_addr != NULL)
7668 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7669 htab->tls_get_addr->is_func = 1;
7675 no_tls_get_addr_opt = TRUE;
7677 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7678 return _bfd_elf_tls_setup (info->output_bfd, info);
7681 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7685 branch_reloc_hash_match (const bfd *ibfd,
7686 const Elf_Internal_Rela *rel,
7687 const struct ppc_link_hash_entry *hash1,
7688 const struct ppc_link_hash_entry *hash2)
7690 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7691 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7692 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7694 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7696 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7697 struct elf_link_hash_entry *h;
7699 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7700 h = elf_follow_link (h);
7701 if (h == &hash1->elf || h == &hash2->elf)
7707 /* Run through all the TLS relocs looking for optimization
7708 opportunities. The linker has been hacked (see ppc64elf.em) to do
7709 a preliminary section layout so that we know the TLS segment
7710 offsets. We can't optimize earlier because some optimizations need
7711 to know the tp offset, and we need to optimize before allocating
7712 dynamic relocations. */
7715 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7719 struct ppc_link_hash_table *htab;
7720 unsigned char *toc_ref;
7723 if (info->relocatable || !info->executable)
7726 htab = ppc_hash_table (info);
7730 /* Make two passes over the relocs. On the first pass, mark toc
7731 entries involved with tls relocs, and check that tls relocs
7732 involved in setting up a tls_get_addr call are indeed followed by
7733 such a call. If they are not, we can't do any tls optimization.
7734 On the second pass twiddle tls_mask flags to notify
7735 relocate_section that optimization can be done, and adjust got
7736 and plt refcounts. */
7738 for (pass = 0; pass < 2; ++pass)
7739 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7741 Elf_Internal_Sym *locsyms = NULL;
7742 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7744 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7745 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7747 Elf_Internal_Rela *relstart, *rel, *relend;
7748 bfd_boolean found_tls_get_addr_arg = 0;
7750 /* Read the relocations. */
7751 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7753 if (relstart == NULL)
7756 relend = relstart + sec->reloc_count;
7757 for (rel = relstart; rel < relend; rel++)
7759 enum elf_ppc64_reloc_type r_type;
7760 unsigned long r_symndx;
7761 struct elf_link_hash_entry *h;
7762 Elf_Internal_Sym *sym;
7764 unsigned char *tls_mask;
7765 unsigned char tls_set, tls_clear, tls_type = 0;
7767 bfd_boolean ok_tprel, is_local;
7768 long toc_ref_index = 0;
7769 int expecting_tls_get_addr = 0;
7770 bfd_boolean ret = FALSE;
7772 r_symndx = ELF64_R_SYM (rel->r_info);
7773 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7777 if (elf_section_data (sec)->relocs != relstart)
7779 if (toc_ref != NULL)
7782 && (elf_symtab_hdr (ibfd).contents
7783 != (unsigned char *) locsyms))
7790 if (h->root.type == bfd_link_hash_defined
7791 || h->root.type == bfd_link_hash_defweak)
7792 value = h->root.u.def.value;
7793 else if (h->root.type == bfd_link_hash_undefweak)
7797 found_tls_get_addr_arg = 0;
7802 /* Symbols referenced by TLS relocs must be of type
7803 STT_TLS. So no need for .opd local sym adjust. */
7804 value = sym->st_value;
7813 && h->root.type == bfd_link_hash_undefweak)
7817 value += sym_sec->output_offset;
7818 value += sym_sec->output_section->vma;
7819 value -= htab->elf.tls_sec->vma;
7820 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7821 < (bfd_vma) 1 << 32);
7825 r_type = ELF64_R_TYPE (rel->r_info);
7826 /* If this section has old-style __tls_get_addr calls
7827 without marker relocs, then check that each
7828 __tls_get_addr call reloc is preceded by a reloc
7829 that conceivably belongs to the __tls_get_addr arg
7830 setup insn. If we don't find matching arg setup
7831 relocs, don't do any tls optimization. */
7833 && sec->has_tls_get_addr_call
7835 && (h == &htab->tls_get_addr->elf
7836 || h == &htab->tls_get_addr_fd->elf)
7837 && !found_tls_get_addr_arg
7838 && is_branch_reloc (r_type))
7840 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7841 "TLS optimization disabled\n"),
7842 ibfd, sec, rel->r_offset);
7847 found_tls_get_addr_arg = 0;
7850 case R_PPC64_GOT_TLSLD16:
7851 case R_PPC64_GOT_TLSLD16_LO:
7852 expecting_tls_get_addr = 1;
7853 found_tls_get_addr_arg = 1;
7856 case R_PPC64_GOT_TLSLD16_HI:
7857 case R_PPC64_GOT_TLSLD16_HA:
7858 /* These relocs should never be against a symbol
7859 defined in a shared lib. Leave them alone if
7860 that turns out to be the case. */
7867 tls_type = TLS_TLS | TLS_LD;
7870 case R_PPC64_GOT_TLSGD16:
7871 case R_PPC64_GOT_TLSGD16_LO:
7872 expecting_tls_get_addr = 1;
7873 found_tls_get_addr_arg = 1;
7876 case R_PPC64_GOT_TLSGD16_HI:
7877 case R_PPC64_GOT_TLSGD16_HA:
7883 tls_set = TLS_TLS | TLS_TPRELGD;
7885 tls_type = TLS_TLS | TLS_GD;
7888 case R_PPC64_GOT_TPREL16_DS:
7889 case R_PPC64_GOT_TPREL16_LO_DS:
7890 case R_PPC64_GOT_TPREL16_HI:
7891 case R_PPC64_GOT_TPREL16_HA:
7896 tls_clear = TLS_TPREL;
7897 tls_type = TLS_TLS | TLS_TPREL;
7904 found_tls_get_addr_arg = 1;
7909 case R_PPC64_TOC16_LO:
7910 if (sym_sec == NULL || sym_sec != toc)
7913 /* Mark this toc entry as referenced by a TLS
7914 code sequence. We can do that now in the
7915 case of R_PPC64_TLS, and after checking for
7916 tls_get_addr for the TOC16 relocs. */
7917 if (toc_ref == NULL)
7918 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7919 if (toc_ref == NULL)
7923 value = h->root.u.def.value;
7925 value = sym->st_value;
7926 value += rel->r_addend;
7927 BFD_ASSERT (value < toc->size && value % 8 == 0);
7928 toc_ref_index = (value + toc->output_offset) / 8;
7929 if (r_type == R_PPC64_TLS
7930 || r_type == R_PPC64_TLSGD
7931 || r_type == R_PPC64_TLSLD)
7933 toc_ref[toc_ref_index] = 1;
7937 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7942 expecting_tls_get_addr = 2;
7945 case R_PPC64_TPREL64:
7949 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7954 tls_set = TLS_EXPLICIT;
7955 tls_clear = TLS_TPREL;
7960 case R_PPC64_DTPMOD64:
7964 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7966 if (rel + 1 < relend
7968 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7969 && rel[1].r_offset == rel->r_offset + 8)
7973 tls_set = TLS_EXPLICIT | TLS_GD;
7976 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7985 tls_set = TLS_EXPLICIT;
7996 if (!expecting_tls_get_addr
7997 || !sec->has_tls_get_addr_call)
8000 if (rel + 1 < relend
8001 && branch_reloc_hash_match (ibfd, rel + 1,
8003 htab->tls_get_addr_fd))
8005 if (expecting_tls_get_addr == 2)
8007 /* Check for toc tls entries. */
8008 unsigned char *toc_tls;
8011 retval = get_tls_mask (&toc_tls, NULL, NULL,
8016 if (toc_tls != NULL)
8018 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8019 found_tls_get_addr_arg = 1;
8021 toc_ref[toc_ref_index] = 1;
8027 if (expecting_tls_get_addr != 1)
8030 /* Uh oh, we didn't find the expected call. We
8031 could just mark this symbol to exclude it
8032 from tls optimization but it's safer to skip
8033 the entire optimization. */
8034 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8035 "TLS optimization disabled\n"),
8036 ibfd, sec, rel->r_offset);
8041 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8043 struct plt_entry *ent;
8044 for (ent = htab->tls_get_addr->elf.plt.plist;
8047 if (ent->addend == 0)
8049 if (ent->plt.refcount > 0)
8051 ent->plt.refcount -= 1;
8052 expecting_tls_get_addr = 0;
8058 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8060 struct plt_entry *ent;
8061 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8064 if (ent->addend == 0)
8066 if (ent->plt.refcount > 0)
8067 ent->plt.refcount -= 1;
8075 if ((tls_set & TLS_EXPLICIT) == 0)
8077 struct got_entry *ent;
8079 /* Adjust got entry for this reloc. */
8083 ent = elf_local_got_ents (ibfd)[r_symndx];
8085 for (; ent != NULL; ent = ent->next)
8086 if (ent->addend == rel->r_addend
8087 && ent->owner == ibfd
8088 && ent->tls_type == tls_type)
8095 /* We managed to get rid of a got entry. */
8096 if (ent->got.refcount > 0)
8097 ent->got.refcount -= 1;
8102 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8103 we'll lose one or two dyn relocs. */
8104 if (!dec_dynrel_count (rel->r_info, sec, info,
8108 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8110 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8116 *tls_mask |= tls_set;
8117 *tls_mask &= ~tls_clear;
8120 if (elf_section_data (sec)->relocs != relstart)
8125 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8127 if (!info->keep_memory)
8130 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8134 if (toc_ref != NULL)
8139 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8140 the values of any global symbols in a toc section that has been
8141 edited. Globals in toc sections should be a rarity, so this function
8142 sets a flag if any are found in toc sections other than the one just
8143 edited, so that futher hash table traversals can be avoided. */
8145 struct adjust_toc_info
8148 unsigned long *skip;
8149 bfd_boolean global_toc_syms;
8152 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8155 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8157 struct ppc_link_hash_entry *eh;
8158 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8161 if (h->root.type != bfd_link_hash_defined
8162 && h->root.type != bfd_link_hash_defweak)
8165 eh = (struct ppc_link_hash_entry *) h;
8166 if (eh->adjust_done)
8169 if (eh->elf.root.u.def.section == toc_inf->toc)
8171 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8172 i = toc_inf->toc->rawsize >> 3;
8174 i = eh->elf.root.u.def.value >> 3;
8176 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8178 (*_bfd_error_handler)
8179 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8182 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8183 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8186 eh->elf.root.u.def.value -= toc_inf->skip[i];
8187 eh->adjust_done = 1;
8189 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8190 toc_inf->global_toc_syms = TRUE;
8195 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8198 ok_lo_toc_insn (unsigned int insn)
8200 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8201 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8202 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8203 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8204 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8205 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8206 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8207 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8208 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8209 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8210 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8211 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8212 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8213 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8214 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8216 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8217 && ((insn & 3) == 0 || (insn & 3) == 3))
8218 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8221 /* Examine all relocs referencing .toc sections in order to remove
8222 unused .toc entries. */
8225 ppc64_elf_edit_toc (struct bfd_link_info *info)
8228 struct adjust_toc_info toc_inf;
8229 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8231 htab->do_toc_opt = 1;
8232 toc_inf.global_toc_syms = TRUE;
8233 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8235 asection *toc, *sec;
8236 Elf_Internal_Shdr *symtab_hdr;
8237 Elf_Internal_Sym *local_syms;
8238 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8239 unsigned long *skip, *drop;
8240 unsigned char *used;
8241 unsigned char *keep, last, some_unused;
8243 if (!is_ppc64_elf (ibfd))
8246 toc = bfd_get_section_by_name (ibfd, ".toc");
8249 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8250 || discarded_section (toc))
8255 symtab_hdr = &elf_symtab_hdr (ibfd);
8257 /* Look at sections dropped from the final link. */
8260 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8262 if (sec->reloc_count == 0
8263 || !discarded_section (sec)
8264 || get_opd_info (sec)
8265 || (sec->flags & SEC_ALLOC) == 0
8266 || (sec->flags & SEC_DEBUGGING) != 0)
8269 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8270 if (relstart == NULL)
8273 /* Run through the relocs to see which toc entries might be
8275 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8277 enum elf_ppc64_reloc_type r_type;
8278 unsigned long r_symndx;
8280 struct elf_link_hash_entry *h;
8281 Elf_Internal_Sym *sym;
8284 r_type = ELF64_R_TYPE (rel->r_info);
8291 case R_PPC64_TOC16_LO:
8292 case R_PPC64_TOC16_HI:
8293 case R_PPC64_TOC16_HA:
8294 case R_PPC64_TOC16_DS:
8295 case R_PPC64_TOC16_LO_DS:
8299 r_symndx = ELF64_R_SYM (rel->r_info);
8300 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8308 val = h->root.u.def.value;
8310 val = sym->st_value;
8311 val += rel->r_addend;
8313 if (val >= toc->size)
8316 /* Anything in the toc ought to be aligned to 8 bytes.
8317 If not, don't mark as unused. */
8323 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8328 skip[val >> 3] = ref_from_discarded;
8331 if (elf_section_data (sec)->relocs != relstart)
8335 /* For largetoc loads of address constants, we can convert
8336 . addis rx,2,addr@got@ha
8337 . ld ry,addr@got@l(rx)
8339 . addis rx,2,addr@toc@ha
8340 . addi ry,rx,addr@toc@l
8341 when addr is within 2G of the toc pointer. This then means
8342 that the word storing "addr" in the toc is no longer needed. */
8344 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8345 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8346 && toc->reloc_count != 0)
8348 /* Read toc relocs. */
8349 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8351 if (toc_relocs == NULL)
8354 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8356 enum elf_ppc64_reloc_type r_type;
8357 unsigned long r_symndx;
8359 struct elf_link_hash_entry *h;
8360 Elf_Internal_Sym *sym;
8363 r_type = ELF64_R_TYPE (rel->r_info);
8364 if (r_type != R_PPC64_ADDR64)
8367 r_symndx = ELF64_R_SYM (rel->r_info);
8368 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8373 || discarded_section (sym_sec))
8376 if (!SYMBOL_CALLS_LOCAL (info, h))
8381 if (h->type == STT_GNU_IFUNC)
8383 val = h->root.u.def.value;
8387 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8389 val = sym->st_value;
8391 val += rel->r_addend;
8392 val += sym_sec->output_section->vma + sym_sec->output_offset;
8394 /* We don't yet know the exact toc pointer value, but we
8395 know it will be somewhere in the toc section. Don't
8396 optimize if the difference from any possible toc
8397 pointer is outside [ff..f80008000, 7fff7fff]. */
8398 addr = toc->output_section->vma + TOC_BASE_OFF;
8399 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8402 addr = toc->output_section->vma + toc->output_section->rawsize;
8403 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8408 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8413 skip[rel->r_offset >> 3]
8414 |= can_optimize | ((rel - toc_relocs) << 2);
8421 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8425 if (local_syms != NULL
8426 && symtab_hdr->contents != (unsigned char *) local_syms)
8430 && elf_section_data (sec)->relocs != relstart)
8432 if (toc_relocs != NULL
8433 && elf_section_data (toc)->relocs != toc_relocs)
8440 /* Now check all kept sections that might reference the toc.
8441 Check the toc itself last. */
8442 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8445 sec = (sec == toc ? NULL
8446 : sec->next == NULL ? toc
8447 : sec->next == toc && toc->next ? toc->next
8452 if (sec->reloc_count == 0
8453 || discarded_section (sec)
8454 || get_opd_info (sec)
8455 || (sec->flags & SEC_ALLOC) == 0
8456 || (sec->flags & SEC_DEBUGGING) != 0)
8459 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8461 if (relstart == NULL)
8464 /* Mark toc entries referenced as used. */
8468 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8470 enum elf_ppc64_reloc_type r_type;
8471 unsigned long r_symndx;
8473 struct elf_link_hash_entry *h;
8474 Elf_Internal_Sym *sym;
8476 enum {no_check, check_lo, check_ha} insn_check;
8478 r_type = ELF64_R_TYPE (rel->r_info);
8482 insn_check = no_check;
8485 case R_PPC64_GOT_TLSLD16_HA:
8486 case R_PPC64_GOT_TLSGD16_HA:
8487 case R_PPC64_GOT_TPREL16_HA:
8488 case R_PPC64_GOT_DTPREL16_HA:
8489 case R_PPC64_GOT16_HA:
8490 case R_PPC64_TOC16_HA:
8491 insn_check = check_ha;
8494 case R_PPC64_GOT_TLSLD16_LO:
8495 case R_PPC64_GOT_TLSGD16_LO:
8496 case R_PPC64_GOT_TPREL16_LO_DS:
8497 case R_PPC64_GOT_DTPREL16_LO_DS:
8498 case R_PPC64_GOT16_LO:
8499 case R_PPC64_GOT16_LO_DS:
8500 case R_PPC64_TOC16_LO:
8501 case R_PPC64_TOC16_LO_DS:
8502 insn_check = check_lo;
8506 if (insn_check != no_check)
8508 bfd_vma off = rel->r_offset & ~3;
8509 unsigned char buf[4];
8512 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8517 insn = bfd_get_32 (ibfd, buf);
8518 if (insn_check == check_lo
8519 ? !ok_lo_toc_insn (insn)
8520 : ((insn & ((0x3f << 26) | 0x1f << 16))
8521 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8525 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8526 sprintf (str, "%#08x", insn);
8527 info->callbacks->einfo
8528 (_("%P: %H: toc optimization is not supported for"
8529 " %s instruction.\n"),
8530 ibfd, sec, rel->r_offset & ~3, str);
8537 case R_PPC64_TOC16_LO:
8538 case R_PPC64_TOC16_HI:
8539 case R_PPC64_TOC16_HA:
8540 case R_PPC64_TOC16_DS:
8541 case R_PPC64_TOC16_LO_DS:
8542 /* In case we're taking addresses of toc entries. */
8543 case R_PPC64_ADDR64:
8550 r_symndx = ELF64_R_SYM (rel->r_info);
8551 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8562 val = h->root.u.def.value;
8564 val = sym->st_value;
8565 val += rel->r_addend;
8567 if (val >= toc->size)
8570 if ((skip[val >> 3] & can_optimize) != 0)
8577 case R_PPC64_TOC16_HA:
8580 case R_PPC64_TOC16_LO_DS:
8581 off = rel->r_offset;
8582 off += (bfd_big_endian (ibfd) ? -2 : 3);
8583 if (!bfd_get_section_contents (ibfd, sec, &opc,
8589 if ((opc & (0x3f << 2)) == (58u << 2))
8594 /* Wrong sort of reloc, or not a ld. We may
8595 as well clear ref_from_discarded too. */
8602 /* For the toc section, we only mark as used if this
8603 entry itself isn't unused. */
8604 else if ((used[rel->r_offset >> 3]
8605 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8608 /* Do all the relocs again, to catch reference
8617 if (elf_section_data (sec)->relocs != relstart)
8621 /* Merge the used and skip arrays. Assume that TOC
8622 doublewords not appearing as either used or unused belong
8623 to to an entry more than one doubleword in size. */
8624 for (drop = skip, keep = used, last = 0, some_unused = 0;
8625 drop < skip + (toc->size + 7) / 8;
8630 *drop &= ~ref_from_discarded;
8631 if ((*drop & can_optimize) != 0)
8635 else if ((*drop & ref_from_discarded) != 0)
8638 last = ref_from_discarded;
8648 bfd_byte *contents, *src;
8650 Elf_Internal_Sym *sym;
8651 bfd_boolean local_toc_syms = FALSE;
8653 /* Shuffle the toc contents, and at the same time convert the
8654 skip array from booleans into offsets. */
8655 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8658 elf_section_data (toc)->this_hdr.contents = contents;
8660 for (src = contents, off = 0, drop = skip;
8661 src < contents + toc->size;
8664 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8669 memcpy (src - off, src, 8);
8673 toc->rawsize = toc->size;
8674 toc->size = src - contents - off;
8676 /* Adjust addends for relocs against the toc section sym,
8677 and optimize any accesses we can. */
8678 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8680 if (sec->reloc_count == 0
8681 || discarded_section (sec))
8684 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8686 if (relstart == NULL)
8689 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8691 enum elf_ppc64_reloc_type r_type;
8692 unsigned long r_symndx;
8694 struct elf_link_hash_entry *h;
8697 r_type = ELF64_R_TYPE (rel->r_info);
8704 case R_PPC64_TOC16_LO:
8705 case R_PPC64_TOC16_HI:
8706 case R_PPC64_TOC16_HA:
8707 case R_PPC64_TOC16_DS:
8708 case R_PPC64_TOC16_LO_DS:
8709 case R_PPC64_ADDR64:
8713 r_symndx = ELF64_R_SYM (rel->r_info);
8714 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8722 val = h->root.u.def.value;
8725 val = sym->st_value;
8727 local_toc_syms = TRUE;
8730 val += rel->r_addend;
8732 if (val > toc->rawsize)
8734 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8736 else if ((skip[val >> 3] & can_optimize) != 0)
8738 Elf_Internal_Rela *tocrel
8739 = toc_relocs + (skip[val >> 3] >> 2);
8740 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8744 case R_PPC64_TOC16_HA:
8745 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8748 case R_PPC64_TOC16_LO_DS:
8749 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8753 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8755 info->callbacks->einfo
8756 (_("%P: %H: %s references "
8757 "optimized away TOC entry\n"),
8758 ibfd, sec, rel->r_offset,
8759 ppc64_elf_howto_table[r_type]->name);
8760 bfd_set_error (bfd_error_bad_value);
8763 rel->r_addend = tocrel->r_addend;
8764 elf_section_data (sec)->relocs = relstart;
8768 if (h != NULL || sym->st_value != 0)
8771 rel->r_addend -= skip[val >> 3];
8772 elf_section_data (sec)->relocs = relstart;
8775 if (elf_section_data (sec)->relocs != relstart)
8779 /* We shouldn't have local or global symbols defined in the TOC,
8780 but handle them anyway. */
8781 if (local_syms != NULL)
8782 for (sym = local_syms;
8783 sym < local_syms + symtab_hdr->sh_info;
8785 if (sym->st_value != 0
8786 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8790 if (sym->st_value > toc->rawsize)
8791 i = toc->rawsize >> 3;
8793 i = sym->st_value >> 3;
8795 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8798 (*_bfd_error_handler)
8799 (_("%s defined on removed toc entry"),
8800 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8803 while ((skip[i] & (ref_from_discarded | can_optimize)));
8804 sym->st_value = (bfd_vma) i << 3;
8807 sym->st_value -= skip[i];
8808 symtab_hdr->contents = (unsigned char *) local_syms;
8811 /* Adjust any global syms defined in this toc input section. */
8812 if (toc_inf.global_toc_syms)
8815 toc_inf.skip = skip;
8816 toc_inf.global_toc_syms = FALSE;
8817 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8821 if (toc->reloc_count != 0)
8823 Elf_Internal_Shdr *rel_hdr;
8824 Elf_Internal_Rela *wrel;
8827 /* Remove unused toc relocs, and adjust those we keep. */
8828 if (toc_relocs == NULL)
8829 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8831 if (toc_relocs == NULL)
8835 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8836 if ((skip[rel->r_offset >> 3]
8837 & (ref_from_discarded | can_optimize)) == 0)
8839 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8840 wrel->r_info = rel->r_info;
8841 wrel->r_addend = rel->r_addend;
8844 else if (!dec_dynrel_count (rel->r_info, toc, info,
8845 &local_syms, NULL, NULL))
8848 elf_section_data (toc)->relocs = toc_relocs;
8849 toc->reloc_count = wrel - toc_relocs;
8850 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8851 sz = rel_hdr->sh_entsize;
8852 rel_hdr->sh_size = toc->reloc_count * sz;
8855 else if (toc_relocs != NULL
8856 && elf_section_data (toc)->relocs != toc_relocs)
8859 if (local_syms != NULL
8860 && symtab_hdr->contents != (unsigned char *) local_syms)
8862 if (!info->keep_memory)
8865 symtab_hdr->contents = (unsigned char *) local_syms;
8873 /* Return true iff input section I references the TOC using
8874 instructions limited to +/-32k offsets. */
8877 ppc64_elf_has_small_toc_reloc (asection *i)
8879 return (is_ppc64_elf (i->owner)
8880 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8883 /* Allocate space for one GOT entry. */
8886 allocate_got (struct elf_link_hash_entry *h,
8887 struct bfd_link_info *info,
8888 struct got_entry *gent)
8890 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8892 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8893 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8895 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8896 ? 2 : 1) * sizeof (Elf64_External_Rela);
8897 asection *got = ppc64_elf_tdata (gent->owner)->got;
8899 gent->got.offset = got->size;
8900 got->size += entsize;
8902 dyn = htab->elf.dynamic_sections_created;
8903 if (h->type == STT_GNU_IFUNC)
8905 htab->reliplt->size += rentsize;
8906 htab->got_reli_size += rentsize;
8908 else if ((info->shared
8909 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8910 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8911 || h->root.type != bfd_link_hash_undefweak))
8913 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8914 relgot->size += rentsize;
8918 /* This function merges got entries in the same toc group. */
8921 merge_got_entries (struct got_entry **pent)
8923 struct got_entry *ent, *ent2;
8925 for (ent = *pent; ent != NULL; ent = ent->next)
8926 if (!ent->is_indirect)
8927 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8928 if (!ent2->is_indirect
8929 && ent2->addend == ent->addend
8930 && ent2->tls_type == ent->tls_type
8931 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8933 ent2->is_indirect = TRUE;
8934 ent2->got.ent = ent;
8938 /* Allocate space in .plt, .got and associated reloc sections for
8942 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8944 struct bfd_link_info *info;
8945 struct ppc_link_hash_table *htab;
8947 struct ppc_link_hash_entry *eh;
8948 struct elf_dyn_relocs *p;
8949 struct got_entry **pgent, *gent;
8951 if (h->root.type == bfd_link_hash_indirect)
8954 info = (struct bfd_link_info *) inf;
8955 htab = ppc_hash_table (info);
8959 if ((htab->elf.dynamic_sections_created
8961 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8962 || h->type == STT_GNU_IFUNC)
8964 struct plt_entry *pent;
8965 bfd_boolean doneone = FALSE;
8966 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8967 if (pent->plt.refcount > 0)
8969 if (!htab->elf.dynamic_sections_created
8970 || h->dynindx == -1)
8973 pent->plt.offset = s->size;
8974 s->size += PLT_ENTRY_SIZE;
8979 /* If this is the first .plt entry, make room for the special
8983 s->size += PLT_INITIAL_ENTRY_SIZE;
8985 pent->plt.offset = s->size;
8987 /* Make room for this entry. */
8988 s->size += PLT_ENTRY_SIZE;
8990 /* Make room for the .glink code. */
8993 s->size += GLINK_CALL_STUB_SIZE;
8994 /* We need bigger stubs past index 32767. */
8995 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8999 /* We also need to make an entry in the .rela.plt section. */
9002 s->size += sizeof (Elf64_External_Rela);
9006 pent->plt.offset = (bfd_vma) -1;
9009 h->plt.plist = NULL;
9015 h->plt.plist = NULL;
9019 eh = (struct ppc_link_hash_entry *) h;
9020 /* Run through the TLS GD got entries first if we're changing them
9022 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9023 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9024 if (gent->got.refcount > 0
9025 && (gent->tls_type & TLS_GD) != 0)
9027 /* This was a GD entry that has been converted to TPREL. If
9028 there happens to be a TPREL entry we can use that one. */
9029 struct got_entry *ent;
9030 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9031 if (ent->got.refcount > 0
9032 && (ent->tls_type & TLS_TPREL) != 0
9033 && ent->addend == gent->addend
9034 && ent->owner == gent->owner)
9036 gent->got.refcount = 0;
9040 /* If not, then we'll be using our own TPREL entry. */
9041 if (gent->got.refcount != 0)
9042 gent->tls_type = TLS_TLS | TLS_TPREL;
9045 /* Remove any list entry that won't generate a word in the GOT before
9046 we call merge_got_entries. Otherwise we risk merging to empty
9048 pgent = &h->got.glist;
9049 while ((gent = *pgent) != NULL)
9050 if (gent->got.refcount > 0)
9052 if ((gent->tls_type & TLS_LD) != 0
9055 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9056 *pgent = gent->next;
9059 pgent = &gent->next;
9062 *pgent = gent->next;
9064 if (!htab->do_multi_toc)
9065 merge_got_entries (&h->got.glist);
9067 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9068 if (!gent->is_indirect)
9070 /* Make sure this symbol is output as a dynamic symbol.
9071 Undefined weak syms won't yet be marked as dynamic,
9072 nor will all TLS symbols. */
9073 if (h->dynindx == -1
9075 && h->type != STT_GNU_IFUNC
9076 && htab->elf.dynamic_sections_created)
9078 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9082 if (!is_ppc64_elf (gent->owner))
9085 allocate_got (h, info, gent);
9088 if (eh->dyn_relocs == NULL
9089 || (!htab->elf.dynamic_sections_created
9090 && h->type != STT_GNU_IFUNC))
9093 /* In the shared -Bsymbolic case, discard space allocated for
9094 dynamic pc-relative relocs against symbols which turn out to be
9095 defined in regular objects. For the normal shared case, discard
9096 space for relocs that have become local due to symbol visibility
9101 /* Relocs that use pc_count are those that appear on a call insn,
9102 or certain REL relocs (see must_be_dyn_reloc) that can be
9103 generated via assembly. We want calls to protected symbols to
9104 resolve directly to the function rather than going via the plt.
9105 If people want function pointer comparisons to work as expected
9106 then they should avoid writing weird assembly. */
9107 if (SYMBOL_CALLS_LOCAL (info, h))
9109 struct elf_dyn_relocs **pp;
9111 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9113 p->count -= p->pc_count;
9122 /* Also discard relocs on undefined weak syms with non-default
9124 if (eh->dyn_relocs != NULL
9125 && h->root.type == bfd_link_hash_undefweak)
9127 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9128 eh->dyn_relocs = NULL;
9130 /* Make sure this symbol is output as a dynamic symbol.
9131 Undefined weak syms won't yet be marked as dynamic. */
9132 else if (h->dynindx == -1
9133 && !h->forced_local)
9135 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9140 else if (h->type == STT_GNU_IFUNC)
9142 if (!h->non_got_ref)
9143 eh->dyn_relocs = NULL;
9145 else if (ELIMINATE_COPY_RELOCS)
9147 /* For the non-shared case, discard space for relocs against
9148 symbols which turn out to need copy relocs or are not
9154 /* Make sure this symbol is output as a dynamic symbol.
9155 Undefined weak syms won't yet be marked as dynamic. */
9156 if (h->dynindx == -1
9157 && !h->forced_local)
9159 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9163 /* If that succeeded, we know we'll be keeping all the
9165 if (h->dynindx != -1)
9169 eh->dyn_relocs = NULL;
9174 /* Finally, allocate space. */
9175 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9177 asection *sreloc = elf_section_data (p->sec)->sreloc;
9178 if (eh->elf.type == STT_GNU_IFUNC)
9179 sreloc = htab->reliplt;
9180 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9186 /* Find any dynamic relocs that apply to read-only sections. */
9189 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9191 struct ppc_link_hash_entry *eh;
9192 struct elf_dyn_relocs *p;
9194 eh = (struct ppc_link_hash_entry *) h;
9195 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9197 asection *s = p->sec->output_section;
9199 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9201 struct bfd_link_info *info = inf;
9203 info->flags |= DF_TEXTREL;
9205 /* Not an error, just cut short the traversal. */
9212 /* Set the sizes of the dynamic sections. */
9215 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9216 struct bfd_link_info *info)
9218 struct ppc_link_hash_table *htab;
9223 struct got_entry *first_tlsld;
9225 htab = ppc_hash_table (info);
9229 dynobj = htab->elf.dynobj;
9233 if (htab->elf.dynamic_sections_created)
9235 /* Set the contents of the .interp section to the interpreter. */
9236 if (info->executable)
9238 s = bfd_get_linker_section (dynobj, ".interp");
9241 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9242 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9246 /* Set up .got offsets for local syms, and space for local dynamic
9248 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9250 struct got_entry **lgot_ents;
9251 struct got_entry **end_lgot_ents;
9252 struct plt_entry **local_plt;
9253 struct plt_entry **end_local_plt;
9254 unsigned char *lgot_masks;
9255 bfd_size_type locsymcount;
9256 Elf_Internal_Shdr *symtab_hdr;
9258 if (!is_ppc64_elf (ibfd))
9261 for (s = ibfd->sections; s != NULL; s = s->next)
9263 struct ppc_dyn_relocs *p;
9265 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9267 if (!bfd_is_abs_section (p->sec)
9268 && bfd_is_abs_section (p->sec->output_section))
9270 /* Input section has been discarded, either because
9271 it is a copy of a linkonce section or due to
9272 linker script /DISCARD/, so we'll be discarding
9275 else if (p->count != 0)
9277 asection *srel = elf_section_data (p->sec)->sreloc;
9279 srel = htab->reliplt;
9280 srel->size += p->count * sizeof (Elf64_External_Rela);
9281 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9282 info->flags |= DF_TEXTREL;
9287 lgot_ents = elf_local_got_ents (ibfd);
9291 symtab_hdr = &elf_symtab_hdr (ibfd);
9292 locsymcount = symtab_hdr->sh_info;
9293 end_lgot_ents = lgot_ents + locsymcount;
9294 local_plt = (struct plt_entry **) end_lgot_ents;
9295 end_local_plt = local_plt + locsymcount;
9296 lgot_masks = (unsigned char *) end_local_plt;
9297 s = ppc64_elf_tdata (ibfd)->got;
9298 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9300 struct got_entry **pent, *ent;
9303 while ((ent = *pent) != NULL)
9304 if (ent->got.refcount > 0)
9306 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9308 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9313 unsigned int ent_size = 8;
9314 unsigned int rel_size = sizeof (Elf64_External_Rela);
9316 ent->got.offset = s->size;
9317 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9322 s->size += ent_size;
9323 if ((*lgot_masks & PLT_IFUNC) != 0)
9325 htab->reliplt->size += rel_size;
9326 htab->got_reli_size += rel_size;
9328 else if (info->shared)
9330 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9331 srel->size += rel_size;
9340 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9341 for (; local_plt < end_local_plt; ++local_plt)
9343 struct plt_entry *ent;
9345 for (ent = *local_plt; ent != NULL; ent = ent->next)
9346 if (ent->plt.refcount > 0)
9349 ent->plt.offset = s->size;
9350 s->size += PLT_ENTRY_SIZE;
9352 htab->reliplt->size += sizeof (Elf64_External_Rela);
9355 ent->plt.offset = (bfd_vma) -1;
9359 /* Allocate global sym .plt and .got entries, and space for global
9360 sym dynamic relocs. */
9361 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9364 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9366 struct got_entry *ent;
9368 if (!is_ppc64_elf (ibfd))
9371 ent = ppc64_tlsld_got (ibfd);
9372 if (ent->got.refcount > 0)
9374 if (!htab->do_multi_toc && first_tlsld != NULL)
9376 ent->is_indirect = TRUE;
9377 ent->got.ent = first_tlsld;
9381 if (first_tlsld == NULL)
9383 s = ppc64_elf_tdata (ibfd)->got;
9384 ent->got.offset = s->size;
9389 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9390 srel->size += sizeof (Elf64_External_Rela);
9395 ent->got.offset = (bfd_vma) -1;
9398 /* We now have determined the sizes of the various dynamic sections.
9399 Allocate memory for them. */
9401 for (s = dynobj->sections; s != NULL; s = s->next)
9403 if ((s->flags & SEC_LINKER_CREATED) == 0)
9406 if (s == htab->brlt || s == htab->relbrlt)
9407 /* These haven't been allocated yet; don't strip. */
9409 else if (s == htab->got
9413 || s == htab->dynbss)
9415 /* Strip this section if we don't need it; see the
9418 else if (s == htab->glink_eh_frame)
9420 if (!bfd_is_abs_section (s->output_section))
9421 /* Not sized yet. */
9424 else if (CONST_STRNEQ (s->name, ".rela"))
9428 if (s != htab->relplt)
9431 /* We use the reloc_count field as a counter if we need
9432 to copy relocs into the output file. */
9438 /* It's not one of our sections, so don't allocate space. */
9444 /* If we don't need this section, strip it from the
9445 output file. This is mostly to handle .rela.bss and
9446 .rela.plt. We must create both sections in
9447 create_dynamic_sections, because they must be created
9448 before the linker maps input sections to output
9449 sections. The linker does that before
9450 adjust_dynamic_symbol is called, and it is that
9451 function which decides whether anything needs to go
9452 into these sections. */
9453 s->flags |= SEC_EXCLUDE;
9457 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9460 /* Allocate memory for the section contents. We use bfd_zalloc
9461 here in case unused entries are not reclaimed before the
9462 section's contents are written out. This should not happen,
9463 but this way if it does we get a R_PPC64_NONE reloc in .rela
9464 sections instead of garbage.
9465 We also rely on the section contents being zero when writing
9467 s->contents = bfd_zalloc (dynobj, s->size);
9468 if (s->contents == NULL)
9472 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9474 if (!is_ppc64_elf (ibfd))
9477 s = ppc64_elf_tdata (ibfd)->got;
9478 if (s != NULL && s != htab->got)
9481 s->flags |= SEC_EXCLUDE;
9484 s->contents = bfd_zalloc (ibfd, s->size);
9485 if (s->contents == NULL)
9489 s = ppc64_elf_tdata (ibfd)->relgot;
9493 s->flags |= SEC_EXCLUDE;
9496 s->contents = bfd_zalloc (ibfd, s->size);
9497 if (s->contents == NULL)
9505 if (htab->elf.dynamic_sections_created)
9507 /* Add some entries to the .dynamic section. We fill in the
9508 values later, in ppc64_elf_finish_dynamic_sections, but we
9509 must add the entries now so that we get the correct size for
9510 the .dynamic section. The DT_DEBUG entry is filled in by the
9511 dynamic linker and used by the debugger. */
9512 #define add_dynamic_entry(TAG, VAL) \
9513 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9515 if (info->executable)
9517 if (!add_dynamic_entry (DT_DEBUG, 0))
9521 if (htab->plt != NULL && htab->plt->size != 0)
9523 if (!add_dynamic_entry (DT_PLTGOT, 0)
9524 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9525 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9526 || !add_dynamic_entry (DT_JMPREL, 0)
9527 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9533 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9534 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9538 if (!htab->no_tls_get_addr_opt
9539 && htab->tls_get_addr_fd != NULL
9540 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9541 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9546 if (!add_dynamic_entry (DT_RELA, 0)
9547 || !add_dynamic_entry (DT_RELASZ, 0)
9548 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9551 /* If any dynamic relocs apply to a read-only section,
9552 then we need a DT_TEXTREL entry. */
9553 if ((info->flags & DF_TEXTREL) == 0)
9554 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9556 if ((info->flags & DF_TEXTREL) != 0)
9558 if (!add_dynamic_entry (DT_TEXTREL, 0))
9563 #undef add_dynamic_entry
9568 /* Determine the type of stub needed, if any, for a call. */
9570 static inline enum ppc_stub_type
9571 ppc_type_of_stub (asection *input_sec,
9572 const Elf_Internal_Rela *rel,
9573 struct ppc_link_hash_entry **hash,
9574 struct plt_entry **plt_ent,
9575 bfd_vma destination)
9577 struct ppc_link_hash_entry *h = *hash;
9579 bfd_vma branch_offset;
9580 bfd_vma max_branch_offset;
9581 enum elf_ppc64_reloc_type r_type;
9585 struct plt_entry *ent;
9586 struct ppc_link_hash_entry *fdh = h;
9588 && h->oh->is_func_descriptor)
9590 fdh = ppc_follow_link (h->oh);
9594 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9595 if (ent->addend == rel->r_addend
9596 && ent->plt.offset != (bfd_vma) -1)
9599 return ppc_stub_plt_call;
9602 /* Here, we know we don't have a plt entry. If we don't have a
9603 either a defined function descriptor or a defined entry symbol
9604 in a regular object file, then it is pointless trying to make
9605 any other type of stub. */
9606 if (!is_static_defined (&fdh->elf)
9607 && !is_static_defined (&h->elf))
9608 return ppc_stub_none;
9610 else if (elf_local_got_ents (input_sec->owner) != NULL)
9612 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9613 struct plt_entry **local_plt = (struct plt_entry **)
9614 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9615 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9617 if (local_plt[r_symndx] != NULL)
9619 struct plt_entry *ent;
9621 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9622 if (ent->addend == rel->r_addend
9623 && ent->plt.offset != (bfd_vma) -1)
9626 return ppc_stub_plt_call;
9631 /* Determine where the call point is. */
9632 location = (input_sec->output_offset
9633 + input_sec->output_section->vma
9636 branch_offset = destination - location;
9637 r_type = ELF64_R_TYPE (rel->r_info);
9639 /* Determine if a long branch stub is needed. */
9640 max_branch_offset = 1 << 25;
9641 if (r_type != R_PPC64_REL24)
9642 max_branch_offset = 1 << 15;
9644 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9645 /* We need a stub. Figure out whether a long_branch or plt_branch
9647 return ppc_stub_long_branch;
9649 return ppc_stub_none;
9652 /* With power7 weakly ordered memory model, it is possible for ld.so
9653 to update a plt entry in one thread and have another thread see a
9654 stale zero toc entry. To avoid this we need some sort of acquire
9655 barrier in the call stub. One solution is to make the load of the
9656 toc word seem to appear to depend on the load of the function entry
9657 word. Another solution is to test for r2 being zero, and branch to
9658 the appropriate glink entry if so.
9660 . fake dep barrier compare
9661 . ld 11,xxx(2) ld 11,xxx(2)
9663 . xor 11,11,11 ld 2,xxx+8(2)
9664 . add 2,2,11 cmpldi 2,0
9665 . ld 2,xxx+8(2) bnectr+
9666 . bctr b <glink_entry>
9668 The solution involving the compare turns out to be faster, so
9669 that's what we use unless the branch won't reach. */
9671 #define ALWAYS_USE_FAKE_DEP 0
9672 #define ALWAYS_EMIT_R2SAVE 0
9674 #define PPC_LO(v) ((v) & 0xffff)
9675 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9676 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9678 static inline unsigned int
9679 plt_stub_size (struct ppc_link_hash_table *htab,
9680 struct ppc_stub_hash_entry *stub_entry,
9683 unsigned size = PLT_CALL_STUB_SIZE;
9685 if (!(ALWAYS_EMIT_R2SAVE
9686 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9688 if (!htab->plt_static_chain)
9690 if (htab->plt_thread_safe)
9692 if (PPC_HA (off) == 0)
9694 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9696 if (stub_entry->h != NULL
9697 && (stub_entry->h == htab->tls_get_addr_fd
9698 || stub_entry->h == htab->tls_get_addr)
9699 && !htab->no_tls_get_addr_opt)
9704 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9705 then return the padding needed to do so. */
9706 static inline unsigned int
9707 plt_stub_pad (struct ppc_link_hash_table *htab,
9708 struct ppc_stub_hash_entry *stub_entry,
9711 int stub_align = 1 << htab->plt_stub_align;
9712 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9713 bfd_vma stub_off = stub_entry->stub_sec->size;
9715 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9716 > (stub_size & -stub_align))
9717 return stub_align - (stub_off & (stub_align - 1));
9721 /* Build a .plt call stub. */
9723 static inline bfd_byte *
9724 build_plt_stub (struct ppc_link_hash_table *htab,
9725 struct ppc_stub_hash_entry *stub_entry,
9726 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9728 bfd *obfd = htab->stub_bfd;
9729 bfd_boolean plt_static_chain = htab->plt_static_chain;
9730 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9731 bfd_boolean use_fake_dep = plt_thread_safe;
9732 bfd_vma cmp_branch_off = 0;
9734 if (!ALWAYS_USE_FAKE_DEP
9736 && !(stub_entry->h != NULL
9737 && (stub_entry->h == htab->tls_get_addr_fd
9738 || stub_entry->h == htab->tls_get_addr)
9739 && !htab->no_tls_get_addr_opt))
9741 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9742 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9743 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9746 if (pltindex > 32768)
9747 glinkoff += (pltindex - 32768) * 4;
9749 + htab->glink->output_offset
9750 + htab->glink->output_section->vma);
9751 from = (p - stub_entry->stub_sec->contents
9752 + 4 * (ALWAYS_EMIT_R2SAVE
9753 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9754 + 4 * (PPC_HA (offset) != 0)
9755 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9757 + 4 * (plt_static_chain != 0)
9759 + stub_entry->stub_sec->output_offset
9760 + stub_entry->stub_sec->output_section->vma);
9761 cmp_branch_off = to - from;
9762 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9765 if (PPC_HA (offset) != 0)
9769 if (ALWAYS_EMIT_R2SAVE
9770 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9772 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9773 r[1].r_offset = r[0].r_offset + 4;
9774 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9775 r[1].r_addend = r[0].r_addend;
9776 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9778 r[2].r_offset = r[1].r_offset + 4;
9779 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9780 r[2].r_addend = r[0].r_addend;
9784 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9785 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9786 r[2].r_addend = r[0].r_addend + 8;
9787 if (plt_static_chain)
9789 r[3].r_offset = r[2].r_offset + 4;
9790 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9791 r[3].r_addend = r[0].r_addend + 16;
9795 if (ALWAYS_EMIT_R2SAVE
9796 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9797 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9798 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9799 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9800 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9802 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9805 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9808 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9809 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9811 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9812 if (plt_static_chain)
9813 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9819 if (ALWAYS_EMIT_R2SAVE
9820 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9822 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9823 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9825 r[1].r_offset = r[0].r_offset + 4;
9826 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9827 r[1].r_addend = r[0].r_addend;
9831 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9832 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9833 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9834 if (plt_static_chain)
9836 r[2].r_offset = r[1].r_offset + 4;
9837 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9838 r[2].r_addend = r[0].r_addend + 8;
9842 if (ALWAYS_EMIT_R2SAVE
9843 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9844 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9845 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9846 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9848 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9851 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9854 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9855 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9857 if (plt_static_chain)
9858 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9859 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9861 if (plt_thread_safe && !use_fake_dep)
9863 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9864 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9865 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
9868 bfd_put_32 (obfd, BCTR, p), p += 4;
9872 /* Build a special .plt call stub for __tls_get_addr. */
9874 #define LD_R11_0R3 0xe9630000
9875 #define LD_R12_0R3 0xe9830000
9876 #define MR_R0_R3 0x7c601b78
9877 #define CMPDI_R11_0 0x2c2b0000
9878 #define ADD_R3_R12_R13 0x7c6c6a14
9879 #define BEQLR 0x4d820020
9880 #define MR_R3_R0 0x7c030378
9881 #define MFLR_R11 0x7d6802a6
9882 #define STD_R11_0R1 0xf9610000
9883 #define BCTRL 0x4e800421
9884 #define LD_R11_0R1 0xe9610000
9885 #define LD_R2_0R1 0xe8410000
9886 #define MTLR_R11 0x7d6803a6
9888 static inline bfd_byte *
9889 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
9890 struct ppc_stub_hash_entry *stub_entry,
9891 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9893 bfd *obfd = htab->stub_bfd;
9895 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9896 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9897 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9898 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9899 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9900 bfd_put_32 (obfd, BEQLR, p), p += 4;
9901 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9902 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9903 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9906 r[0].r_offset += 9 * 4;
9907 p = build_plt_stub (htab, stub_entry, p, offset, r);
9908 bfd_put_32 (obfd, BCTRL, p - 4);
9910 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9911 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9912 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9913 bfd_put_32 (obfd, BLR, p), p += 4;
9918 static Elf_Internal_Rela *
9919 get_relocs (asection *sec, int count)
9921 Elf_Internal_Rela *relocs;
9922 struct bfd_elf_section_data *elfsec_data;
9924 elfsec_data = elf_section_data (sec);
9925 relocs = elfsec_data->relocs;
9928 bfd_size_type relsize;
9929 relsize = sec->reloc_count * sizeof (*relocs);
9930 relocs = bfd_alloc (sec->owner, relsize);
9933 elfsec_data->relocs = relocs;
9934 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9935 sizeof (Elf_Internal_Shdr));
9936 if (elfsec_data->rela.hdr == NULL)
9938 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9939 * sizeof (Elf64_External_Rela));
9940 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9941 sec->reloc_count = 0;
9943 relocs += sec->reloc_count;
9944 sec->reloc_count += count;
9949 get_r2off (struct bfd_link_info *info,
9950 struct ppc_stub_hash_entry *stub_entry)
9952 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9953 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9957 /* Support linking -R objects. Get the toc pointer from the
9960 asection *opd = stub_entry->h->elf.root.u.def.section;
9961 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9963 if (strcmp (opd->name, ".opd") != 0
9964 || opd->reloc_count != 0)
9966 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
9967 stub_entry->h->elf.root.root.string);
9968 bfd_set_error (bfd_error_bad_value);
9971 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9973 r2off = bfd_get_64 (opd->owner, buf);
9974 r2off -= elf_gp (info->output_bfd);
9976 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9981 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9983 struct ppc_stub_hash_entry *stub_entry;
9984 struct ppc_branch_hash_entry *br_entry;
9985 struct bfd_link_info *info;
9986 struct ppc_link_hash_table *htab;
9991 Elf_Internal_Rela *r;
9994 /* Massage our args to the form they really have. */
9995 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9998 htab = ppc_hash_table (info);
10002 /* Make a note of the offset within the stubs for this entry. */
10003 stub_entry->stub_offset = stub_entry->stub_sec->size;
10004 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10006 htab->stub_count[stub_entry->stub_type - 1] += 1;
10007 switch (stub_entry->stub_type)
10009 case ppc_stub_long_branch:
10010 case ppc_stub_long_branch_r2off:
10011 /* Branches are relative. This is where we are going to. */
10012 off = dest = (stub_entry->target_value
10013 + stub_entry->target_section->output_offset
10014 + stub_entry->target_section->output_section->vma);
10016 /* And this is where we are coming from. */
10017 off -= (stub_entry->stub_offset
10018 + stub_entry->stub_sec->output_offset
10019 + stub_entry->stub_sec->output_section->vma);
10022 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10024 bfd_vma r2off = get_r2off (info, stub_entry);
10028 htab->stub_error = TRUE;
10031 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10034 if (PPC_HA (r2off) != 0)
10037 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10040 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10044 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10046 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10048 info->callbacks->einfo
10049 (_("%P: long branch stub `%s' offset overflow\n"),
10050 stub_entry->root.string);
10051 htab->stub_error = TRUE;
10055 if (info->emitrelocations)
10057 r = get_relocs (stub_entry->stub_sec, 1);
10060 r->r_offset = loc - stub_entry->stub_sec->contents;
10061 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10062 r->r_addend = dest;
10063 if (stub_entry->h != NULL)
10065 struct elf_link_hash_entry **hashes;
10066 unsigned long symndx;
10067 struct ppc_link_hash_entry *h;
10069 hashes = elf_sym_hashes (htab->stub_bfd);
10070 if (hashes == NULL)
10072 bfd_size_type hsize;
10074 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10075 hashes = bfd_zalloc (htab->stub_bfd, hsize);
10076 if (hashes == NULL)
10078 elf_sym_hashes (htab->stub_bfd) = hashes;
10079 htab->stub_globals = 1;
10081 symndx = htab->stub_globals++;
10083 hashes[symndx] = &h->elf;
10084 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10085 if (h->oh != NULL && h->oh->is_func)
10086 h = ppc_follow_link (h->oh);
10087 if (h->elf.root.u.def.section != stub_entry->target_section)
10088 /* H is an opd symbol. The addend must be zero. */
10092 off = (h->elf.root.u.def.value
10093 + h->elf.root.u.def.section->output_offset
10094 + h->elf.root.u.def.section->output_section->vma);
10095 r->r_addend -= off;
10101 case ppc_stub_plt_branch:
10102 case ppc_stub_plt_branch_r2off:
10103 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10104 stub_entry->root.string + 9,
10106 if (br_entry == NULL)
10108 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10109 stub_entry->root.string);
10110 htab->stub_error = TRUE;
10114 dest = (stub_entry->target_value
10115 + stub_entry->target_section->output_offset
10116 + stub_entry->target_section->output_section->vma);
10118 bfd_put_64 (htab->brlt->owner, dest,
10119 htab->brlt->contents + br_entry->offset);
10121 if (br_entry->iter == htab->stub_iteration)
10123 br_entry->iter = 0;
10125 if (htab->relbrlt != NULL)
10127 /* Create a reloc for the branch lookup table entry. */
10128 Elf_Internal_Rela rela;
10131 rela.r_offset = (br_entry->offset
10132 + htab->brlt->output_offset
10133 + htab->brlt->output_section->vma);
10134 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10135 rela.r_addend = dest;
10137 rl = htab->relbrlt->contents;
10138 rl += (htab->relbrlt->reloc_count++
10139 * sizeof (Elf64_External_Rela));
10140 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10142 else if (info->emitrelocations)
10144 r = get_relocs (htab->brlt, 1);
10147 /* brlt, being SEC_LINKER_CREATED does not go through the
10148 normal reloc processing. Symbols and offsets are not
10149 translated from input file to output file form, so
10150 set up the offset per the output file. */
10151 r->r_offset = (br_entry->offset
10152 + htab->brlt->output_offset
10153 + htab->brlt->output_section->vma);
10154 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10155 r->r_addend = dest;
10159 dest = (br_entry->offset
10160 + htab->brlt->output_offset
10161 + htab->brlt->output_section->vma);
10164 - elf_gp (htab->brlt->output_section->owner)
10165 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10167 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10169 info->callbacks->einfo
10170 (_("%P: linkage table error against `%T'\n"),
10171 stub_entry->root.string);
10172 bfd_set_error (bfd_error_bad_value);
10173 htab->stub_error = TRUE;
10177 if (info->emitrelocations)
10179 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10182 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10183 if (bfd_big_endian (info->output_bfd))
10184 r[0].r_offset += 2;
10185 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10186 r[0].r_offset += 4;
10187 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10188 r[0].r_addend = dest;
10189 if (PPC_HA (off) != 0)
10191 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10192 r[1].r_offset = r[0].r_offset + 4;
10193 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10194 r[1].r_addend = r[0].r_addend;
10198 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10200 if (PPC_HA (off) != 0)
10203 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10205 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10210 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10215 bfd_vma r2off = get_r2off (info, stub_entry);
10219 htab->stub_error = TRUE;
10223 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10226 if (PPC_HA (off) != 0)
10229 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10231 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10236 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10240 if (PPC_HA (r2off) != 0)
10243 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10246 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10249 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10251 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10254 case ppc_stub_plt_call:
10255 case ppc_stub_plt_call_r2save:
10256 if (stub_entry->h != NULL
10257 && stub_entry->h->is_func_descriptor
10258 && stub_entry->h->oh != NULL)
10260 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10262 /* If the old-ABI "dot-symbol" is undefined make it weak so
10263 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10264 FIXME: We used to define the symbol on one of the call
10265 stubs instead, which is why we test symbol section id
10266 against htab->top_id in various places. Likely all
10267 these checks could now disappear. */
10268 if (fh->elf.root.type == bfd_link_hash_undefined)
10269 fh->elf.root.type = bfd_link_hash_undefweak;
10270 /* Stop undo_symbol_twiddle changing it back to undefined. */
10271 fh->was_undefined = 0;
10274 /* Now build the stub. */
10275 dest = stub_entry->plt_ent->plt.offset & ~1;
10276 if (dest >= (bfd_vma) -2)
10280 if (!htab->elf.dynamic_sections_created
10281 || stub_entry->h == NULL
10282 || stub_entry->h->elf.dynindx == -1)
10285 dest += plt->output_offset + plt->output_section->vma;
10287 if (stub_entry->h == NULL
10288 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10290 Elf_Internal_Rela rela;
10293 rela.r_offset = dest;
10294 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10295 rela.r_addend = (stub_entry->target_value
10296 + stub_entry->target_section->output_offset
10297 + stub_entry->target_section->output_section->vma);
10299 rl = (htab->reliplt->contents
10300 + (htab->reliplt->reloc_count++
10301 * sizeof (Elf64_External_Rela)));
10302 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10303 stub_entry->plt_ent->plt.offset |= 1;
10307 - elf_gp (plt->output_section->owner)
10308 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10310 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10312 info->callbacks->einfo
10313 (_("%P: linkage table error against `%T'\n"),
10314 stub_entry->h != NULL
10315 ? stub_entry->h->elf.root.root.string
10317 bfd_set_error (bfd_error_bad_value);
10318 htab->stub_error = TRUE;
10322 if (htab->plt_stub_align != 0)
10324 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10326 stub_entry->stub_sec->size += pad;
10327 stub_entry->stub_offset = stub_entry->stub_sec->size;
10332 if (info->emitrelocations)
10334 r = get_relocs (stub_entry->stub_sec,
10336 + (PPC_HA (off) != 0)
10337 + (htab->plt_static_chain
10338 && PPC_HA (off + 16) == PPC_HA (off))));
10341 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10342 if (bfd_big_endian (info->output_bfd))
10343 r[0].r_offset += 2;
10344 r[0].r_addend = dest;
10346 if (stub_entry->h != NULL
10347 && (stub_entry->h == htab->tls_get_addr_fd
10348 || stub_entry->h == htab->tls_get_addr)
10349 && !htab->no_tls_get_addr_opt)
10350 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10352 p = build_plt_stub (htab, stub_entry, loc, off, r);
10361 stub_entry->stub_sec->size += size;
10363 if (htab->emit_stub_syms)
10365 struct elf_link_hash_entry *h;
10368 const char *const stub_str[] = { "long_branch",
10369 "long_branch_r2off",
10371 "plt_branch_r2off",
10375 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10376 len2 = strlen (stub_entry->root.string);
10377 name = bfd_malloc (len1 + len2 + 2);
10380 memcpy (name, stub_entry->root.string, 9);
10381 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10382 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10383 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10386 if (h->root.type == bfd_link_hash_new)
10388 h->root.type = bfd_link_hash_defined;
10389 h->root.u.def.section = stub_entry->stub_sec;
10390 h->root.u.def.value = stub_entry->stub_offset;
10391 h->ref_regular = 1;
10392 h->def_regular = 1;
10393 h->ref_regular_nonweak = 1;
10394 h->forced_local = 1;
10402 /* As above, but don't actually build the stub. Just bump offset so
10403 we know stub section sizes, and select plt_branch stubs where
10404 long_branch stubs won't do. */
10407 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10409 struct ppc_stub_hash_entry *stub_entry;
10410 struct bfd_link_info *info;
10411 struct ppc_link_hash_table *htab;
10415 /* Massage our args to the form they really have. */
10416 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10419 htab = ppc_hash_table (info);
10423 if (stub_entry->stub_type == ppc_stub_plt_call
10424 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10427 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10428 if (off >= (bfd_vma) -2)
10431 if (!htab->elf.dynamic_sections_created
10432 || stub_entry->h == NULL
10433 || stub_entry->h->elf.dynindx == -1)
10435 off += (plt->output_offset
10436 + plt->output_section->vma
10437 - elf_gp (plt->output_section->owner)
10438 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10440 size = plt_stub_size (htab, stub_entry, off);
10441 if (htab->plt_stub_align)
10442 size += plt_stub_pad (htab, stub_entry, off);
10443 if (info->emitrelocations)
10445 stub_entry->stub_sec->reloc_count
10447 + (PPC_HA (off) != 0)
10448 + (htab->plt_static_chain
10449 && PPC_HA (off + 16) == PPC_HA (off)));
10450 stub_entry->stub_sec->flags |= SEC_RELOC;
10455 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10459 off = (stub_entry->target_value
10460 + stub_entry->target_section->output_offset
10461 + stub_entry->target_section->output_section->vma);
10462 off -= (stub_entry->stub_sec->size
10463 + stub_entry->stub_sec->output_offset
10464 + stub_entry->stub_sec->output_section->vma);
10466 /* Reset the stub type from the plt variant in case we now
10467 can reach with a shorter stub. */
10468 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10469 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10472 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10474 r2off = get_r2off (info, stub_entry);
10477 htab->stub_error = TRUE;
10481 if (PPC_HA (r2off) != 0)
10486 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10487 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10489 struct ppc_branch_hash_entry *br_entry;
10491 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10492 stub_entry->root.string + 9,
10494 if (br_entry == NULL)
10496 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10497 stub_entry->root.string);
10498 htab->stub_error = TRUE;
10502 if (br_entry->iter != htab->stub_iteration)
10504 br_entry->iter = htab->stub_iteration;
10505 br_entry->offset = htab->brlt->size;
10506 htab->brlt->size += 8;
10508 if (htab->relbrlt != NULL)
10509 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10510 else if (info->emitrelocations)
10512 htab->brlt->reloc_count += 1;
10513 htab->brlt->flags |= SEC_RELOC;
10517 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10518 off = (br_entry->offset
10519 + htab->brlt->output_offset
10520 + htab->brlt->output_section->vma
10521 - elf_gp (htab->brlt->output_section->owner)
10522 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10524 if (info->emitrelocations)
10526 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10527 stub_entry->stub_sec->flags |= SEC_RELOC;
10530 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10533 if (PPC_HA (off) != 0)
10539 if (PPC_HA (off) != 0)
10542 if (PPC_HA (r2off) != 0)
10546 else if (info->emitrelocations)
10548 stub_entry->stub_sec->reloc_count += 1;
10549 stub_entry->stub_sec->flags |= SEC_RELOC;
10553 stub_entry->stub_sec->size += size;
10557 /* Set up various things so that we can make a list of input sections
10558 for each output section included in the link. Returns -1 on error,
10559 0 when no stubs will be needed, and 1 on success. */
10562 ppc64_elf_setup_section_lists
10563 (struct bfd_link_info *info,
10564 asection *(*add_stub_section) (const char *, asection *),
10565 void (*layout_sections_again) (void))
10568 int top_id, top_index, id;
10570 asection **input_list;
10572 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10576 /* Stash our params away. */
10577 htab->add_stub_section = add_stub_section;
10578 htab->layout_sections_again = layout_sections_again;
10580 /* Find the top input section id. */
10581 for (input_bfd = info->input_bfds, top_id = 3;
10583 input_bfd = input_bfd->link_next)
10585 for (section = input_bfd->sections;
10587 section = section->next)
10589 if (top_id < section->id)
10590 top_id = section->id;
10594 htab->top_id = top_id;
10595 amt = sizeof (struct map_stub) * (top_id + 1);
10596 htab->stub_group = bfd_zmalloc (amt);
10597 if (htab->stub_group == NULL)
10600 /* Set toc_off for com, und, abs and ind sections. */
10601 for (id = 0; id < 3; id++)
10602 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10604 /* We can't use output_bfd->section_count here to find the top output
10605 section index as some sections may have been removed, and
10606 strip_excluded_output_sections doesn't renumber the indices. */
10607 for (section = info->output_bfd->sections, top_index = 0;
10609 section = section->next)
10611 if (top_index < section->index)
10612 top_index = section->index;
10615 htab->top_index = top_index;
10616 amt = sizeof (asection *) * (top_index + 1);
10617 input_list = bfd_zmalloc (amt);
10618 htab->input_list = input_list;
10619 if (input_list == NULL)
10625 /* Set up for first pass at multitoc partitioning. */
10628 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10630 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10632 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
10633 htab->toc_bfd = NULL;
10634 htab->toc_first_sec = NULL;
10637 /* The linker repeatedly calls this function for each TOC input section
10638 and linker generated GOT section. Group input bfds such that the toc
10639 within a group is less than 64k in size. */
10642 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10644 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10645 bfd_vma addr, off, limit;
10650 if (!htab->second_toc_pass)
10652 /* Keep track of the first .toc or .got section for this input bfd. */
10653 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
10657 htab->toc_bfd = isec->owner;
10658 htab->toc_first_sec = isec;
10661 addr = isec->output_offset + isec->output_section->vma;
10662 off = addr - htab->toc_curr;
10663 limit = 0x80008000;
10664 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10666 if (off + isec->size > limit)
10668 addr = (htab->toc_first_sec->output_offset
10669 + htab->toc_first_sec->output_section->vma);
10670 htab->toc_curr = addr;
10673 /* toc_curr is the base address of this toc group. Set elf_gp
10674 for the input section to be the offset relative to the
10675 output toc base plus 0x8000. Making the input elf_gp an
10676 offset allows us to move the toc as a whole without
10677 recalculating input elf_gp. */
10678 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10679 off += TOC_BASE_OFF;
10681 /* Die if someone uses a linker script that doesn't keep input
10682 file .toc and .got together. */
10684 && elf_gp (isec->owner) != 0
10685 && elf_gp (isec->owner) != off)
10688 elf_gp (isec->owner) = off;
10692 /* During the second pass toc_first_sec points to the start of
10693 a toc group, and toc_curr is used to track the old elf_gp.
10694 We use toc_bfd to ensure we only look at each bfd once. */
10695 if (htab->toc_bfd == isec->owner)
10697 htab->toc_bfd = isec->owner;
10699 if (htab->toc_first_sec == NULL
10700 || htab->toc_curr != elf_gp (isec->owner))
10702 htab->toc_curr = elf_gp (isec->owner);
10703 htab->toc_first_sec = isec;
10705 addr = (htab->toc_first_sec->output_offset
10706 + htab->toc_first_sec->output_section->vma);
10707 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10708 elf_gp (isec->owner) = off;
10713 /* Called via elf_link_hash_traverse to merge GOT entries for global
10717 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10719 if (h->root.type == bfd_link_hash_indirect)
10722 merge_got_entries (&h->got.glist);
10727 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10731 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10733 struct got_entry *gent;
10735 if (h->root.type == bfd_link_hash_indirect)
10738 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10739 if (!gent->is_indirect)
10740 allocate_got (h, (struct bfd_link_info *) inf, gent);
10744 /* Called on the first multitoc pass after the last call to
10745 ppc64_elf_next_toc_section. This function removes duplicate GOT
10749 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10751 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10752 struct bfd *ibfd, *ibfd2;
10753 bfd_boolean done_something;
10755 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10757 if (!htab->do_multi_toc)
10760 /* Merge global sym got entries within a toc group. */
10761 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10763 /* And tlsld_got. */
10764 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10766 struct got_entry *ent, *ent2;
10768 if (!is_ppc64_elf (ibfd))
10771 ent = ppc64_tlsld_got (ibfd);
10772 if (!ent->is_indirect
10773 && ent->got.offset != (bfd_vma) -1)
10775 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10777 if (!is_ppc64_elf (ibfd2))
10780 ent2 = ppc64_tlsld_got (ibfd2);
10781 if (!ent2->is_indirect
10782 && ent2->got.offset != (bfd_vma) -1
10783 && elf_gp (ibfd2) == elf_gp (ibfd))
10785 ent2->is_indirect = TRUE;
10786 ent2->got.ent = ent;
10792 /* Zap sizes of got sections. */
10793 htab->reliplt->rawsize = htab->reliplt->size;
10794 htab->reliplt->size -= htab->got_reli_size;
10795 htab->got_reli_size = 0;
10797 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10799 asection *got, *relgot;
10801 if (!is_ppc64_elf (ibfd))
10804 got = ppc64_elf_tdata (ibfd)->got;
10807 got->rawsize = got->size;
10809 relgot = ppc64_elf_tdata (ibfd)->relgot;
10810 relgot->rawsize = relgot->size;
10815 /* Now reallocate the got, local syms first. We don't need to
10816 allocate section contents again since we never increase size. */
10817 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10819 struct got_entry **lgot_ents;
10820 struct got_entry **end_lgot_ents;
10821 struct plt_entry **local_plt;
10822 struct plt_entry **end_local_plt;
10823 unsigned char *lgot_masks;
10824 bfd_size_type locsymcount;
10825 Elf_Internal_Shdr *symtab_hdr;
10828 if (!is_ppc64_elf (ibfd))
10831 lgot_ents = elf_local_got_ents (ibfd);
10835 symtab_hdr = &elf_symtab_hdr (ibfd);
10836 locsymcount = symtab_hdr->sh_info;
10837 end_lgot_ents = lgot_ents + locsymcount;
10838 local_plt = (struct plt_entry **) end_lgot_ents;
10839 end_local_plt = local_plt + locsymcount;
10840 lgot_masks = (unsigned char *) end_local_plt;
10841 s = ppc64_elf_tdata (ibfd)->got;
10842 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10844 struct got_entry *ent;
10846 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10848 unsigned int ent_size = 8;
10849 unsigned int rel_size = sizeof (Elf64_External_Rela);
10851 ent->got.offset = s->size;
10852 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10857 s->size += ent_size;
10858 if ((*lgot_masks & PLT_IFUNC) != 0)
10860 htab->reliplt->size += rel_size;
10861 htab->got_reli_size += rel_size;
10863 else if (info->shared)
10865 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10866 srel->size += rel_size;
10872 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10874 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10876 struct got_entry *ent;
10878 if (!is_ppc64_elf (ibfd))
10881 ent = ppc64_tlsld_got (ibfd);
10882 if (!ent->is_indirect
10883 && ent->got.offset != (bfd_vma) -1)
10885 asection *s = ppc64_elf_tdata (ibfd)->got;
10886 ent->got.offset = s->size;
10890 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10891 srel->size += sizeof (Elf64_External_Rela);
10896 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10897 if (!done_something)
10898 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10902 if (!is_ppc64_elf (ibfd))
10905 got = ppc64_elf_tdata (ibfd)->got;
10908 done_something = got->rawsize != got->size;
10909 if (done_something)
10914 if (done_something)
10915 (*htab->layout_sections_again) ();
10917 /* Set up for second pass over toc sections to recalculate elf_gp
10918 on input sections. */
10919 htab->toc_bfd = NULL;
10920 htab->toc_first_sec = NULL;
10921 htab->second_toc_pass = TRUE;
10922 return done_something;
10925 /* Called after second pass of multitoc partitioning. */
10928 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10930 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10932 /* After the second pass, toc_curr tracks the TOC offset used
10933 for code sections below in ppc64_elf_next_input_section. */
10934 htab->toc_curr = TOC_BASE_OFF;
10937 /* No toc references were found in ISEC. If the code in ISEC makes no
10938 calls, then there's no need to use toc adjusting stubs when branching
10939 into ISEC. Actually, indirect calls from ISEC are OK as they will
10940 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10941 needed, and 2 if a cyclical call-graph was found but no other reason
10942 for a stub was detected. If called from the top level, a return of
10943 2 means the same as a return of 0. */
10946 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10950 /* Mark this section as checked. */
10951 isec->call_check_done = 1;
10953 /* We know none of our code bearing sections will need toc stubs. */
10954 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10957 if (isec->size == 0)
10960 if (isec->output_section == NULL)
10964 if (isec->reloc_count != 0)
10966 Elf_Internal_Rela *relstart, *rel;
10967 Elf_Internal_Sym *local_syms;
10968 struct ppc_link_hash_table *htab;
10970 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10971 info->keep_memory);
10972 if (relstart == NULL)
10975 /* Look for branches to outside of this section. */
10977 htab = ppc_hash_table (info);
10981 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10983 enum elf_ppc64_reloc_type r_type;
10984 unsigned long r_symndx;
10985 struct elf_link_hash_entry *h;
10986 struct ppc_link_hash_entry *eh;
10987 Elf_Internal_Sym *sym;
10989 struct _opd_sec_data *opd;
10993 r_type = ELF64_R_TYPE (rel->r_info);
10994 if (r_type != R_PPC64_REL24
10995 && r_type != R_PPC64_REL14
10996 && r_type != R_PPC64_REL14_BRTAKEN
10997 && r_type != R_PPC64_REL14_BRNTAKEN)
11000 r_symndx = ELF64_R_SYM (rel->r_info);
11001 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11008 /* Calls to dynamic lib functions go through a plt call stub
11010 eh = (struct ppc_link_hash_entry *) h;
11012 && (eh->elf.plt.plist != NULL
11014 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11020 if (sym_sec == NULL)
11021 /* Ignore other undefined symbols. */
11024 /* Assume branches to other sections not included in the
11025 link need stubs too, to cover -R and absolute syms. */
11026 if (sym_sec->output_section == NULL)
11033 sym_value = sym->st_value;
11036 if (h->root.type != bfd_link_hash_defined
11037 && h->root.type != bfd_link_hash_defweak)
11039 sym_value = h->root.u.def.value;
11041 sym_value += rel->r_addend;
11043 /* If this branch reloc uses an opd sym, find the code section. */
11044 opd = get_opd_info (sym_sec);
11047 if (h == NULL && opd->adjust != NULL)
11051 adjust = opd->adjust[sym->st_value / 8];
11053 /* Assume deleted functions won't ever be called. */
11055 sym_value += adjust;
11058 dest = opd_entry_value (sym_sec, sym_value,
11059 &sym_sec, NULL, FALSE);
11060 if (dest == (bfd_vma) -1)
11065 + sym_sec->output_offset
11066 + sym_sec->output_section->vma);
11068 /* Ignore branch to self. */
11069 if (sym_sec == isec)
11072 /* If the called function uses the toc, we need a stub. */
11073 if (sym_sec->has_toc_reloc
11074 || sym_sec->makes_toc_func_call)
11080 /* Assume any branch that needs a long branch stub might in fact
11081 need a plt_branch stub. A plt_branch stub uses r2. */
11082 else if (dest - (isec->output_offset
11083 + isec->output_section->vma
11084 + rel->r_offset) + (1 << 25) >= (2 << 25))
11090 /* If calling back to a section in the process of being
11091 tested, we can't say for sure that no toc adjusting stubs
11092 are needed, so don't return zero. */
11093 else if (sym_sec->call_check_in_progress)
11096 /* Branches to another section that itself doesn't have any TOC
11097 references are OK. Recursively call ourselves to check. */
11098 else if (!sym_sec->call_check_done)
11102 /* Mark current section as indeterminate, so that other
11103 sections that call back to current won't be marked as
11105 isec->call_check_in_progress = 1;
11106 recur = toc_adjusting_stub_needed (info, sym_sec);
11107 isec->call_check_in_progress = 0;
11118 if (local_syms != NULL
11119 && (elf_symtab_hdr (isec->owner).contents
11120 != (unsigned char *) local_syms))
11122 if (elf_section_data (isec)->relocs != relstart)
11127 && isec->map_head.s != NULL
11128 && (strcmp (isec->output_section->name, ".init") == 0
11129 || strcmp (isec->output_section->name, ".fini") == 0))
11131 if (isec->map_head.s->has_toc_reloc
11132 || isec->map_head.s->makes_toc_func_call)
11134 else if (!isec->map_head.s->call_check_done)
11137 isec->call_check_in_progress = 1;
11138 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11139 isec->call_check_in_progress = 0;
11146 isec->makes_toc_func_call = 1;
11151 /* The linker repeatedly calls this function for each input section,
11152 in the order that input sections are linked into output sections.
11153 Build lists of input sections to determine groupings between which
11154 we may insert linker stubs. */
11157 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11159 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11164 if ((isec->output_section->flags & SEC_CODE) != 0
11165 && isec->output_section->index <= htab->top_index)
11167 asection **list = htab->input_list + isec->output_section->index;
11168 /* Steal the link_sec pointer for our list. */
11169 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11170 /* This happens to make the list in reverse order,
11171 which is what we want. */
11172 PREV_SEC (isec) = *list;
11176 if (htab->multi_toc_needed)
11178 /* If a code section has a function that uses the TOC then we need
11179 to use the right TOC (obviously). Also, make sure that .opd gets
11180 the correct TOC value for R_PPC64_TOC relocs that don't have or
11181 can't find their function symbol (shouldn't ever happen now).
11182 Also specially treat .fixup for the linux kernel. .fixup
11183 contains branches, but only back to the function that hit an
11185 if (isec->has_toc_reloc
11186 || (isec->flags & SEC_CODE) == 0
11187 || strcmp (isec->name, ".fixup") == 0)
11189 if (elf_gp (isec->owner) != 0)
11190 htab->toc_curr = elf_gp (isec->owner);
11194 if (!isec->call_check_done
11195 && toc_adjusting_stub_needed (info, isec) < 0)
11197 /* If we make a local call from this section, ie. a branch
11198 without a following nop, then we have no place to put a
11199 toc restoring insn. We must use the same toc group as
11201 Testing makes_toc_func_call actually tests for *any*
11202 calls to functions that need a good toc pointer. A more
11203 precise test would be better, as this one will set
11204 incorrect values for pasted .init/.fini fragments.
11205 (Fixed later in check_pasted_section.) */
11206 if (isec->makes_toc_func_call
11207 && elf_gp (isec->owner) != 0)
11208 htab->toc_curr = elf_gp (isec->owner);
11212 /* Functions that don't use the TOC can belong in any TOC group.
11213 Use the last TOC base. */
11214 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11218 /* Check that all .init and .fini sections use the same toc, if they
11219 have toc relocs. */
11222 check_pasted_section (struct bfd_link_info *info, const char *name)
11224 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11228 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11229 bfd_vma toc_off = 0;
11232 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11233 if (i->has_toc_reloc)
11236 toc_off = htab->stub_group[i->id].toc_off;
11237 else if (toc_off != htab->stub_group[i->id].toc_off)
11242 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11243 if (i->makes_toc_func_call)
11245 toc_off = htab->stub_group[i->id].toc_off;
11249 /* Make sure the whole pasted function uses the same toc offset. */
11251 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11252 htab->stub_group[i->id].toc_off = toc_off;
11258 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11260 return (check_pasted_section (info, ".init")
11261 & check_pasted_section (info, ".fini"));
11264 /* See whether we can group stub sections together. Grouping stub
11265 sections may result in fewer stubs. More importantly, we need to
11266 put all .init* and .fini* stubs at the beginning of the .init or
11267 .fini output sections respectively, because glibc splits the
11268 _init and _fini functions into multiple parts. Putting a stub in
11269 the middle of a function is not a good idea. */
11272 group_sections (struct ppc_link_hash_table *htab,
11273 bfd_size_type stub_group_size,
11274 bfd_boolean stubs_always_before_branch)
11277 bfd_size_type stub14_group_size;
11278 bfd_boolean suppress_size_errors;
11280 suppress_size_errors = FALSE;
11281 stub14_group_size = stub_group_size;
11282 if (stub_group_size == 1)
11284 /* Default values. */
11285 if (stubs_always_before_branch)
11287 stub_group_size = 0x1e00000;
11288 stub14_group_size = 0x7800;
11292 stub_group_size = 0x1c00000;
11293 stub14_group_size = 0x7000;
11295 suppress_size_errors = TRUE;
11298 list = htab->input_list + htab->top_index;
11301 asection *tail = *list;
11302 while (tail != NULL)
11306 bfd_size_type total;
11307 bfd_boolean big_sec;
11311 total = tail->size;
11312 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11313 && ppc64_elf_section_data (tail)->has_14bit_branch
11314 ? stub14_group_size : stub_group_size);
11315 if (big_sec && !suppress_size_errors)
11316 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11317 tail->owner, tail);
11318 curr_toc = htab->stub_group[tail->id].toc_off;
11320 while ((prev = PREV_SEC (curr)) != NULL
11321 && ((total += curr->output_offset - prev->output_offset)
11322 < (ppc64_elf_section_data (prev) != NULL
11323 && ppc64_elf_section_data (prev)->has_14bit_branch
11324 ? stub14_group_size : stub_group_size))
11325 && htab->stub_group[prev->id].toc_off == curr_toc)
11328 /* OK, the size from the start of CURR to the end is less
11329 than stub_group_size and thus can be handled by one stub
11330 section. (or the tail section is itself larger than
11331 stub_group_size, in which case we may be toast.) We
11332 should really be keeping track of the total size of stubs
11333 added here, as stubs contribute to the final output
11334 section size. That's a little tricky, and this way will
11335 only break if stubs added make the total size more than
11336 2^25, ie. for the default stub_group_size, if stubs total
11337 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11340 prev = PREV_SEC (tail);
11341 /* Set up this stub group. */
11342 htab->stub_group[tail->id].link_sec = curr;
11344 while (tail != curr && (tail = prev) != NULL);
11346 /* But wait, there's more! Input sections up to stub_group_size
11347 bytes before the stub section can be handled by it too.
11348 Don't do this if we have a really large section after the
11349 stubs, as adding more stubs increases the chance that
11350 branches may not reach into the stub section. */
11351 if (!stubs_always_before_branch && !big_sec)
11354 while (prev != NULL
11355 && ((total += tail->output_offset - prev->output_offset)
11356 < (ppc64_elf_section_data (prev) != NULL
11357 && ppc64_elf_section_data (prev)->has_14bit_branch
11358 ? stub14_group_size : stub_group_size))
11359 && htab->stub_group[prev->id].toc_off == curr_toc)
11362 prev = PREV_SEC (tail);
11363 htab->stub_group[tail->id].link_sec = curr;
11369 while (list-- != htab->input_list);
11370 free (htab->input_list);
11374 static const unsigned char glink_eh_frame_cie[] =
11376 0, 0, 0, 16, /* length. */
11377 0, 0, 0, 0, /* id. */
11378 1, /* CIE version. */
11379 'z', 'R', 0, /* Augmentation string. */
11380 4, /* Code alignment. */
11381 0x78, /* Data alignment. */
11383 1, /* Augmentation size. */
11384 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11385 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11388 /* Stripping output sections is normally done before dynamic section
11389 symbols have been allocated. This function is called later, and
11390 handles cases like htab->brlt which is mapped to its own output
11394 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11396 if (isec->size == 0
11397 && isec->output_section->size == 0
11398 && !(isec->output_section->flags & SEC_KEEP)
11399 && !bfd_section_removed_from_list (info->output_bfd,
11400 isec->output_section)
11401 && elf_section_data (isec->output_section)->dynindx == 0)
11403 isec->output_section->flags |= SEC_EXCLUDE;
11404 bfd_section_list_remove (info->output_bfd, isec->output_section);
11405 info->output_bfd->section_count--;
11409 /* Determine and set the size of the stub section for a final link.
11411 The basic idea here is to examine all the relocations looking for
11412 PC-relative calls to a target that is unreachable with a "bl"
11416 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11417 bfd_boolean plt_static_chain, int plt_thread_safe,
11418 int plt_stub_align)
11420 bfd_size_type stub_group_size;
11421 bfd_boolean stubs_always_before_branch;
11422 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11427 htab->plt_static_chain = plt_static_chain;
11428 htab->plt_stub_align = plt_stub_align;
11429 if (plt_thread_safe == -1 && !info->executable)
11430 plt_thread_safe = 1;
11431 if (plt_thread_safe == -1)
11433 static const char *const thread_starter[] =
11437 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11439 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11440 "mq_notify", "create_timer",
11444 "GOMP_parallel_start",
11445 "GOMP_parallel_loop_static_start",
11446 "GOMP_parallel_loop_dynamic_start",
11447 "GOMP_parallel_loop_guided_start",
11448 "GOMP_parallel_loop_runtime_start",
11449 "GOMP_parallel_sections_start",
11453 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11455 struct elf_link_hash_entry *h;
11456 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11457 FALSE, FALSE, TRUE);
11458 plt_thread_safe = h != NULL && h->ref_regular;
11459 if (plt_thread_safe)
11463 htab->plt_thread_safe = plt_thread_safe;
11464 stubs_always_before_branch = group_size < 0;
11465 if (group_size < 0)
11466 stub_group_size = -group_size;
11468 stub_group_size = group_size;
11470 group_sections (htab, stub_group_size, stubs_always_before_branch);
11475 unsigned int bfd_indx;
11476 asection *stub_sec;
11478 htab->stub_iteration += 1;
11480 for (input_bfd = info->input_bfds, bfd_indx = 0;
11482 input_bfd = input_bfd->link_next, bfd_indx++)
11484 Elf_Internal_Shdr *symtab_hdr;
11486 Elf_Internal_Sym *local_syms = NULL;
11488 if (!is_ppc64_elf (input_bfd))
11491 /* We'll need the symbol table in a second. */
11492 symtab_hdr = &elf_symtab_hdr (input_bfd);
11493 if (symtab_hdr->sh_info == 0)
11496 /* Walk over each section attached to the input bfd. */
11497 for (section = input_bfd->sections;
11499 section = section->next)
11501 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11503 /* If there aren't any relocs, then there's nothing more
11505 if ((section->flags & SEC_RELOC) == 0
11506 || (section->flags & SEC_ALLOC) == 0
11507 || (section->flags & SEC_LOAD) == 0
11508 || (section->flags & SEC_CODE) == 0
11509 || section->reloc_count == 0)
11512 /* If this section is a link-once section that will be
11513 discarded, then don't create any stubs. */
11514 if (section->output_section == NULL
11515 || section->output_section->owner != info->output_bfd)
11518 /* Get the relocs. */
11520 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11521 info->keep_memory);
11522 if (internal_relocs == NULL)
11523 goto error_ret_free_local;
11525 /* Now examine each relocation. */
11526 irela = internal_relocs;
11527 irelaend = irela + section->reloc_count;
11528 for (; irela < irelaend; irela++)
11530 enum elf_ppc64_reloc_type r_type;
11531 unsigned int r_indx;
11532 enum ppc_stub_type stub_type;
11533 struct ppc_stub_hash_entry *stub_entry;
11534 asection *sym_sec, *code_sec;
11535 bfd_vma sym_value, code_value;
11536 bfd_vma destination;
11537 bfd_boolean ok_dest;
11538 struct ppc_link_hash_entry *hash;
11539 struct ppc_link_hash_entry *fdh;
11540 struct elf_link_hash_entry *h;
11541 Elf_Internal_Sym *sym;
11543 const asection *id_sec;
11544 struct _opd_sec_data *opd;
11545 struct plt_entry *plt_ent;
11547 r_type = ELF64_R_TYPE (irela->r_info);
11548 r_indx = ELF64_R_SYM (irela->r_info);
11550 if (r_type >= R_PPC64_max)
11552 bfd_set_error (bfd_error_bad_value);
11553 goto error_ret_free_internal;
11556 /* Only look for stubs on branch instructions. */
11557 if (r_type != R_PPC64_REL24
11558 && r_type != R_PPC64_REL14
11559 && r_type != R_PPC64_REL14_BRTAKEN
11560 && r_type != R_PPC64_REL14_BRNTAKEN)
11563 /* Now determine the call target, its name, value,
11565 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11566 r_indx, input_bfd))
11567 goto error_ret_free_internal;
11568 hash = (struct ppc_link_hash_entry *) h;
11575 sym_value = sym->st_value;
11578 else if (hash->elf.root.type == bfd_link_hash_defined
11579 || hash->elf.root.type == bfd_link_hash_defweak)
11581 sym_value = hash->elf.root.u.def.value;
11582 if (sym_sec->output_section != NULL)
11585 else if (hash->elf.root.type == bfd_link_hash_undefweak
11586 || hash->elf.root.type == bfd_link_hash_undefined)
11588 /* Recognise an old ABI func code entry sym, and
11589 use the func descriptor sym instead if it is
11591 if (hash->elf.root.root.string[0] == '.'
11592 && (fdh = lookup_fdh (hash, htab)) != NULL)
11594 if (fdh->elf.root.type == bfd_link_hash_defined
11595 || fdh->elf.root.type == bfd_link_hash_defweak)
11597 sym_sec = fdh->elf.root.u.def.section;
11598 sym_value = fdh->elf.root.u.def.value;
11599 if (sym_sec->output_section != NULL)
11608 bfd_set_error (bfd_error_bad_value);
11609 goto error_ret_free_internal;
11615 sym_value += irela->r_addend;
11616 destination = (sym_value
11617 + sym_sec->output_offset
11618 + sym_sec->output_section->vma);
11621 code_sec = sym_sec;
11622 code_value = sym_value;
11623 opd = get_opd_info (sym_sec);
11628 if (hash == NULL && opd->adjust != NULL)
11630 long adjust = opd->adjust[sym_value / 8];
11633 code_value += adjust;
11634 sym_value += adjust;
11636 dest = opd_entry_value (sym_sec, sym_value,
11637 &code_sec, &code_value, FALSE);
11638 if (dest != (bfd_vma) -1)
11640 destination = dest;
11643 /* Fixup old ABI sym to point at code
11645 hash->elf.root.type = bfd_link_hash_defweak;
11646 hash->elf.root.u.def.section = code_sec;
11647 hash->elf.root.u.def.value = code_value;
11652 /* Determine what (if any) linker stub is needed. */
11654 stub_type = ppc_type_of_stub (section, irela, &hash,
11655 &plt_ent, destination);
11657 if (stub_type != ppc_stub_plt_call)
11659 /* Check whether we need a TOC adjusting stub.
11660 Since the linker pastes together pieces from
11661 different object files when creating the
11662 _init and _fini functions, it may be that a
11663 call to what looks like a local sym is in
11664 fact a call needing a TOC adjustment. */
11665 if (code_sec != NULL
11666 && code_sec->output_section != NULL
11667 && (htab->stub_group[code_sec->id].toc_off
11668 != htab->stub_group[section->id].toc_off)
11669 && (code_sec->has_toc_reloc
11670 || code_sec->makes_toc_func_call))
11671 stub_type = ppc_stub_long_branch_r2off;
11674 if (stub_type == ppc_stub_none)
11677 /* __tls_get_addr calls might be eliminated. */
11678 if (stub_type != ppc_stub_plt_call
11680 && (hash == htab->tls_get_addr
11681 || hash == htab->tls_get_addr_fd)
11682 && section->has_tls_reloc
11683 && irela != internal_relocs)
11685 /* Get tls info. */
11686 unsigned char *tls_mask;
11688 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11689 irela - 1, input_bfd))
11690 goto error_ret_free_internal;
11691 if (*tls_mask != 0)
11695 if (stub_type == ppc_stub_plt_call
11696 && irela + 1 < irelaend
11697 && irela[1].r_offset == irela->r_offset + 4
11698 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11700 if (!tocsave_find (htab, INSERT,
11701 &local_syms, irela + 1, input_bfd))
11702 goto error_ret_free_internal;
11704 else if (stub_type == ppc_stub_plt_call)
11705 stub_type = ppc_stub_plt_call_r2save;
11707 /* Support for grouping stub sections. */
11708 id_sec = htab->stub_group[section->id].link_sec;
11710 /* Get the name of this stub. */
11711 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11713 goto error_ret_free_internal;
11715 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11716 stub_name, FALSE, FALSE);
11717 if (stub_entry != NULL)
11719 /* The proper stub has already been created. */
11721 if (stub_type == ppc_stub_plt_call_r2save)
11722 stub_entry->stub_type = stub_type;
11726 stub_entry = ppc_add_stub (stub_name, section, info);
11727 if (stub_entry == NULL)
11730 error_ret_free_internal:
11731 if (elf_section_data (section)->relocs == NULL)
11732 free (internal_relocs);
11733 error_ret_free_local:
11734 if (local_syms != NULL
11735 && (symtab_hdr->contents
11736 != (unsigned char *) local_syms))
11741 stub_entry->stub_type = stub_type;
11742 if (stub_type != ppc_stub_plt_call
11743 && stub_type != ppc_stub_plt_call_r2save)
11745 stub_entry->target_value = code_value;
11746 stub_entry->target_section = code_sec;
11750 stub_entry->target_value = sym_value;
11751 stub_entry->target_section = sym_sec;
11753 stub_entry->h = hash;
11754 stub_entry->plt_ent = plt_ent;
11755 stub_entry->addend = irela->r_addend;
11757 if (stub_entry->h != NULL)
11758 htab->stub_globals += 1;
11761 /* We're done with the internal relocs, free them. */
11762 if (elf_section_data (section)->relocs != internal_relocs)
11763 free (internal_relocs);
11766 if (local_syms != NULL
11767 && symtab_hdr->contents != (unsigned char *) local_syms)
11769 if (!info->keep_memory)
11772 symtab_hdr->contents = (unsigned char *) local_syms;
11776 /* We may have added some stubs. Find out the new size of the
11778 for (stub_sec = htab->stub_bfd->sections;
11780 stub_sec = stub_sec->next)
11781 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11783 stub_sec->rawsize = stub_sec->size;
11784 stub_sec->size = 0;
11785 stub_sec->reloc_count = 0;
11786 stub_sec->flags &= ~SEC_RELOC;
11789 htab->brlt->size = 0;
11790 htab->brlt->reloc_count = 0;
11791 htab->brlt->flags &= ~SEC_RELOC;
11792 if (htab->relbrlt != NULL)
11793 htab->relbrlt->size = 0;
11795 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11797 if (info->emitrelocations
11798 && htab->glink != NULL && htab->glink->size != 0)
11800 htab->glink->reloc_count = 1;
11801 htab->glink->flags |= SEC_RELOC;
11804 if (htab->glink_eh_frame != NULL
11805 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11806 && htab->glink_eh_frame->output_section->size != 0)
11808 size_t size = 0, align;
11810 for (stub_sec = htab->stub_bfd->sections;
11812 stub_sec = stub_sec->next)
11813 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11815 if (htab->glink != NULL && htab->glink->size != 0)
11818 size += sizeof (glink_eh_frame_cie);
11820 align <<= htab->glink_eh_frame->output_section->alignment_power;
11822 size = (size + align) & ~align;
11823 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11824 htab->glink_eh_frame->size = size;
11827 if (htab->plt_stub_align != 0)
11828 for (stub_sec = htab->stub_bfd->sections;
11830 stub_sec = stub_sec->next)
11831 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11832 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11833 & (-1 << htab->plt_stub_align));
11835 for (stub_sec = htab->stub_bfd->sections;
11837 stub_sec = stub_sec->next)
11838 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11839 && stub_sec->rawsize != stub_sec->size)
11842 /* Exit from this loop when no stubs have been added, and no stubs
11843 have changed size. */
11844 if (stub_sec == NULL
11845 && (htab->glink_eh_frame == NULL
11846 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11849 /* Ask the linker to do its stuff. */
11850 (*htab->layout_sections_again) ();
11853 maybe_strip_output (info, htab->brlt);
11854 if (htab->glink_eh_frame != NULL)
11855 maybe_strip_output (info, htab->glink_eh_frame);
11860 /* Called after we have determined section placement. If sections
11861 move, we'll be called again. Provide a value for TOCstart. */
11864 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
11869 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11870 order. The TOC starts where the first of these sections starts. */
11871 s = bfd_get_section_by_name (obfd, ".got");
11872 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11873 s = bfd_get_section_by_name (obfd, ".toc");
11874 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11875 s = bfd_get_section_by_name (obfd, ".tocbss");
11876 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11877 s = bfd_get_section_by_name (obfd, ".plt");
11878 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11880 /* This may happen for
11881 o references to TOC base (SYM@toc / TOC[tc0]) without a
11883 o bad linker script
11884 o --gc-sections and empty TOC sections
11886 FIXME: Warn user? */
11888 /* Look for a likely section. We probably won't even be
11890 for (s = obfd->sections; s != NULL; s = s->next)
11891 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11893 == (SEC_ALLOC | SEC_SMALL_DATA))
11896 for (s = obfd->sections; s != NULL; s = s->next)
11897 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11898 == (SEC_ALLOC | SEC_SMALL_DATA))
11901 for (s = obfd->sections; s != NULL; s = s->next)
11902 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11906 for (s = obfd->sections; s != NULL; s = s->next)
11907 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11913 TOCstart = s->output_section->vma + s->output_offset;
11915 _bfd_set_gp_value (obfd, TOCstart);
11917 if (info != NULL && s != NULL && is_ppc64_elf (obfd))
11919 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11922 && htab->elf.hgot != NULL)
11924 htab->elf.hgot->root.type = bfd_link_hash_defined;
11925 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
11926 htab->elf.hgot->root.u.def.section = s;
11932 /* Build all the stubs associated with the current output file.
11933 The stubs are kept in a hash table attached to the main linker
11934 hash table. This function is called via gldelf64ppc_finish. */
11937 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11938 struct bfd_link_info *info,
11941 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11942 asection *stub_sec;
11944 int stub_sec_count = 0;
11949 htab->emit_stub_syms = emit_stub_syms;
11951 /* Allocate memory to hold the linker stubs. */
11952 for (stub_sec = htab->stub_bfd->sections;
11954 stub_sec = stub_sec->next)
11955 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11956 && stub_sec->size != 0)
11958 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11959 if (stub_sec->contents == NULL)
11961 /* We want to check that built size is the same as calculated
11962 size. rawsize is a convenient location to use. */
11963 stub_sec->rawsize = stub_sec->size;
11964 stub_sec->size = 0;
11967 if (htab->glink != NULL && htab->glink->size != 0)
11972 /* Build the .glink plt call stub. */
11973 if (htab->emit_stub_syms)
11975 struct elf_link_hash_entry *h;
11976 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11977 TRUE, FALSE, FALSE);
11980 if (h->root.type == bfd_link_hash_new)
11982 h->root.type = bfd_link_hash_defined;
11983 h->root.u.def.section = htab->glink;
11984 h->root.u.def.value = 8;
11985 h->ref_regular = 1;
11986 h->def_regular = 1;
11987 h->ref_regular_nonweak = 1;
11988 h->forced_local = 1;
11992 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11993 if (info->emitrelocations)
11995 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11998 r->r_offset = (htab->glink->output_offset
11999 + htab->glink->output_section->vma);
12000 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12001 r->r_addend = plt0;
12003 p = htab->glink->contents;
12004 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12005 bfd_put_64 (htab->glink->owner, plt0, p);
12007 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12009 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12011 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12013 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
12015 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12017 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
12019 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
12021 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
12023 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
12025 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
12027 bfd_put_32 (htab->glink->owner, BCTR, p);
12029 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12031 bfd_put_32 (htab->glink->owner, NOP, p);
12035 /* Build the .glink lazy link call stubs. */
12037 while (p < htab->glink->contents + htab->glink->size)
12041 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12046 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12048 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
12051 bfd_put_32 (htab->glink->owner,
12052 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12056 htab->glink->rawsize = p - htab->glink->contents;
12059 if (htab->brlt->size != 0)
12061 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12063 if (htab->brlt->contents == NULL)
12066 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12068 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12069 htab->relbrlt->size);
12070 if (htab->relbrlt->contents == NULL)
12074 if (htab->glink_eh_frame != NULL
12075 && htab->glink_eh_frame->size != 0)
12078 bfd_byte *last_fde;
12079 size_t last_fde_len, size, align, pad;
12081 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12084 htab->glink_eh_frame->contents = p;
12087 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12089 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12090 /* CIE length (rewrite in case little-endian). */
12091 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12092 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12093 p += sizeof (glink_eh_frame_cie);
12095 for (stub_sec = htab->stub_bfd->sections;
12097 stub_sec = stub_sec->next)
12098 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12103 bfd_put_32 (htab->elf.dynobj, 16, p);
12106 val = p - htab->glink_eh_frame->contents;
12107 bfd_put_32 (htab->elf.dynobj, val, p);
12109 /* Offset to stub section. */
12110 val = (stub_sec->output_section->vma
12111 + stub_sec->output_offset);
12112 val -= (htab->glink_eh_frame->output_section->vma
12113 + htab->glink_eh_frame->output_offset);
12114 val -= p - htab->glink_eh_frame->contents;
12115 if (val + 0x80000000 > 0xffffffff)
12117 info->callbacks->einfo
12118 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12122 bfd_put_32 (htab->elf.dynobj, val, p);
12124 /* stub section size. */
12125 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12127 /* Augmentation. */
12132 if (htab->glink != NULL && htab->glink->size != 0)
12137 bfd_put_32 (htab->elf.dynobj, 20, p);
12140 val = p - htab->glink_eh_frame->contents;
12141 bfd_put_32 (htab->elf.dynobj, val, p);
12143 /* Offset to .glink. */
12144 val = (htab->glink->output_section->vma
12145 + htab->glink->output_offset
12147 val -= (htab->glink_eh_frame->output_section->vma
12148 + htab->glink_eh_frame->output_offset);
12149 val -= p - htab->glink_eh_frame->contents;
12150 if (val + 0x80000000 > 0xffffffff)
12152 info->callbacks->einfo
12153 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12154 htab->glink->name);
12157 bfd_put_32 (htab->elf.dynobj, val, p);
12160 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
12162 /* Augmentation. */
12165 *p++ = DW_CFA_advance_loc + 1;
12166 *p++ = DW_CFA_register;
12169 *p++ = DW_CFA_advance_loc + 4;
12170 *p++ = DW_CFA_restore_extended;
12173 /* Subsume any padding into the last FDE if user .eh_frame
12174 sections are aligned more than glink_eh_frame. Otherwise any
12175 zero padding will be seen as a terminator. */
12176 size = p - htab->glink_eh_frame->contents;
12178 align <<= htab->glink_eh_frame->output_section->alignment_power;
12180 pad = ((size + align) & ~align) - size;
12181 htab->glink_eh_frame->size = size + pad;
12182 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12185 /* Build the stubs as directed by the stub hash table. */
12186 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12188 if (htab->relbrlt != NULL)
12189 htab->relbrlt->reloc_count = 0;
12191 if (htab->plt_stub_align != 0)
12192 for (stub_sec = htab->stub_bfd->sections;
12194 stub_sec = stub_sec->next)
12195 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12196 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12197 & (-1 << htab->plt_stub_align));
12199 for (stub_sec = htab->stub_bfd->sections;
12201 stub_sec = stub_sec->next)
12202 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12204 stub_sec_count += 1;
12205 if (stub_sec->rawsize != stub_sec->size)
12209 if (stub_sec != NULL
12210 || htab->glink->rawsize != htab->glink->size
12211 || (htab->glink_eh_frame != NULL
12212 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12214 htab->stub_error = TRUE;
12215 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12218 if (htab->stub_error)
12223 *stats = bfd_malloc (500);
12224 if (*stats == NULL)
12227 sprintf (*stats, _("linker stubs in %u group%s\n"
12229 " toc adjust %lu\n"
12230 " long branch %lu\n"
12231 " long toc adj %lu\n"
12233 " plt call toc %lu"),
12235 stub_sec_count == 1 ? "" : "s",
12236 htab->stub_count[ppc_stub_long_branch - 1],
12237 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12238 htab->stub_count[ppc_stub_plt_branch - 1],
12239 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12240 htab->stub_count[ppc_stub_plt_call - 1],
12241 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12246 /* This function undoes the changes made by add_symbol_adjust. */
12249 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12251 struct ppc_link_hash_entry *eh;
12253 if (h->root.type == bfd_link_hash_indirect)
12256 eh = (struct ppc_link_hash_entry *) h;
12257 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12260 eh->elf.root.type = bfd_link_hash_undefined;
12265 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12267 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12270 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12273 /* What to do when ld finds relocations against symbols defined in
12274 discarded sections. */
12276 static unsigned int
12277 ppc64_elf_action_discarded (asection *sec)
12279 if (strcmp (".opd", sec->name) == 0)
12282 if (strcmp (".toc", sec->name) == 0)
12285 if (strcmp (".toc1", sec->name) == 0)
12288 return _bfd_elf_default_action_discarded (sec);
12291 /* The RELOCATE_SECTION function is called by the ELF backend linker
12292 to handle the relocations for a section.
12294 The relocs are always passed as Rela structures; if the section
12295 actually uses Rel structures, the r_addend field will always be
12298 This function is responsible for adjust the section contents as
12299 necessary, and (if using Rela relocs and generating a
12300 relocatable output file) adjusting the reloc addend as
12303 This function does not have to worry about setting the reloc
12304 address or the reloc symbol index.
12306 LOCAL_SYMS is a pointer to the swapped in local symbols.
12308 LOCAL_SECTIONS is an array giving the section in the input file
12309 corresponding to the st_shndx field of each local symbol.
12311 The global hash table entry for the global symbols can be found
12312 via elf_sym_hashes (input_bfd).
12314 When generating relocatable output, this function must handle
12315 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12316 going to be the section symbol corresponding to the output
12317 section, which means that the addend must be adjusted
12321 ppc64_elf_relocate_section (bfd *output_bfd,
12322 struct bfd_link_info *info,
12324 asection *input_section,
12325 bfd_byte *contents,
12326 Elf_Internal_Rela *relocs,
12327 Elf_Internal_Sym *local_syms,
12328 asection **local_sections)
12330 struct ppc_link_hash_table *htab;
12331 Elf_Internal_Shdr *symtab_hdr;
12332 struct elf_link_hash_entry **sym_hashes;
12333 Elf_Internal_Rela *rel;
12334 Elf_Internal_Rela *relend;
12335 Elf_Internal_Rela outrel;
12337 struct got_entry **local_got_ents;
12339 bfd_boolean ret = TRUE;
12340 bfd_boolean is_opd;
12341 /* Assume 'at' branch hints. */
12342 bfd_boolean is_isa_v2 = TRUE;
12343 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12345 /* Initialize howto table if needed. */
12346 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12349 htab = ppc_hash_table (info);
12353 /* Don't relocate stub sections. */
12354 if (input_section->owner == htab->stub_bfd)
12357 BFD_ASSERT (is_ppc64_elf (input_bfd));
12359 local_got_ents = elf_local_got_ents (input_bfd);
12360 TOCstart = elf_gp (output_bfd);
12361 symtab_hdr = &elf_symtab_hdr (input_bfd);
12362 sym_hashes = elf_sym_hashes (input_bfd);
12363 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12366 relend = relocs + input_section->reloc_count;
12367 for (; rel < relend; rel++)
12369 enum elf_ppc64_reloc_type r_type;
12371 bfd_reloc_status_type r;
12372 Elf_Internal_Sym *sym;
12374 struct elf_link_hash_entry *h_elf;
12375 struct ppc_link_hash_entry *h;
12376 struct ppc_link_hash_entry *fdh;
12377 const char *sym_name;
12378 unsigned long r_symndx, toc_symndx;
12379 bfd_vma toc_addend;
12380 unsigned char tls_mask, tls_gd, tls_type;
12381 unsigned char sym_type;
12382 bfd_vma relocation;
12383 bfd_boolean unresolved_reloc;
12384 bfd_boolean warned;
12385 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12388 struct ppc_stub_hash_entry *stub_entry;
12389 bfd_vma max_br_offset;
12391 const Elf_Internal_Rela orig_rel = *rel;
12393 r_type = ELF64_R_TYPE (rel->r_info);
12394 r_symndx = ELF64_R_SYM (rel->r_info);
12396 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12397 symbol of the previous ADDR64 reloc. The symbol gives us the
12398 proper TOC base to use. */
12399 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12401 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12403 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12409 unresolved_reloc = FALSE;
12412 if (r_symndx < symtab_hdr->sh_info)
12414 /* It's a local symbol. */
12415 struct _opd_sec_data *opd;
12417 sym = local_syms + r_symndx;
12418 sec = local_sections[r_symndx];
12419 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12420 sym_type = ELF64_ST_TYPE (sym->st_info);
12421 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12422 opd = get_opd_info (sec);
12423 if (opd != NULL && opd->adjust != NULL)
12425 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12430 /* If this is a relocation against the opd section sym
12431 and we have edited .opd, adjust the reloc addend so
12432 that ld -r and ld --emit-relocs output is correct.
12433 If it is a reloc against some other .opd symbol,
12434 then the symbol value will be adjusted later. */
12435 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12436 rel->r_addend += adjust;
12438 relocation += adjust;
12444 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12445 r_symndx, symtab_hdr, sym_hashes,
12446 h_elf, sec, relocation,
12447 unresolved_reloc, warned);
12448 sym_name = h_elf->root.root.string;
12449 sym_type = h_elf->type;
12451 && sec->owner == output_bfd
12452 && strcmp (sec->name, ".opd") == 0)
12454 /* This is a symbol defined in a linker script. All
12455 such are defined in output sections, even those
12456 defined by simple assignment from a symbol defined in
12457 an input section. Transfer the symbol to an
12458 appropriate input .opd section, so that a branch to
12459 this symbol will be mapped to the location specified
12460 by the opd entry. */
12461 struct bfd_link_order *lo;
12462 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
12463 if (lo->type == bfd_indirect_link_order)
12465 asection *isec = lo->u.indirect.section;
12466 if (h_elf->root.u.def.value >= isec->output_offset
12467 && h_elf->root.u.def.value < (isec->output_offset
12470 h_elf->root.u.def.value -= isec->output_offset;
12471 h_elf->root.u.def.section = isec;
12478 h = (struct ppc_link_hash_entry *) h_elf;
12480 if (sec != NULL && discarded_section (sec))
12481 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12483 ppc64_elf_howto_table[r_type], 0,
12486 if (info->relocatable)
12489 if (h != NULL && &h->elf == htab->elf.hgot)
12491 relocation = (TOCstart
12492 + htab->stub_group[input_section->id].toc_off);
12493 sec = bfd_abs_section_ptr;
12494 unresolved_reloc = FALSE;
12497 /* TLS optimizations. Replace instruction sequences and relocs
12498 based on information we collected in tls_optimize. We edit
12499 RELOCS so that --emit-relocs will output something sensible
12500 for the final instruction stream. */
12505 tls_mask = h->tls_mask;
12506 else if (local_got_ents != NULL)
12508 struct plt_entry **local_plt = (struct plt_entry **)
12509 (local_got_ents + symtab_hdr->sh_info);
12510 unsigned char *lgot_masks = (unsigned char *)
12511 (local_plt + symtab_hdr->sh_info);
12512 tls_mask = lgot_masks[r_symndx];
12515 && (r_type == R_PPC64_TLS
12516 || r_type == R_PPC64_TLSGD
12517 || r_type == R_PPC64_TLSLD))
12519 /* Check for toc tls entries. */
12520 unsigned char *toc_tls;
12522 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12523 &local_syms, rel, input_bfd))
12527 tls_mask = *toc_tls;
12530 /* Check that tls relocs are used with tls syms, and non-tls
12531 relocs are used with non-tls syms. */
12532 if (r_symndx != STN_UNDEF
12533 && r_type != R_PPC64_NONE
12535 || h->elf.root.type == bfd_link_hash_defined
12536 || h->elf.root.type == bfd_link_hash_defweak)
12537 && (IS_PPC64_TLS_RELOC (r_type)
12538 != (sym_type == STT_TLS
12539 || (sym_type == STT_SECTION
12540 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12543 && (r_type == R_PPC64_TLS
12544 || r_type == R_PPC64_TLSGD
12545 || r_type == R_PPC64_TLSLD))
12546 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12549 info->callbacks->einfo
12550 (!IS_PPC64_TLS_RELOC (r_type)
12551 ? _("%P: %H: %s used with TLS symbol `%T'\n")
12552 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
12553 input_bfd, input_section, rel->r_offset,
12554 ppc64_elf_howto_table[r_type]->name,
12558 /* Ensure reloc mapping code below stays sane. */
12559 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12560 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12561 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12562 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12563 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12564 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12565 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12566 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12567 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12568 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12576 case R_PPC64_LO_DS_OPT:
12577 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12578 if ((insn & (0x3f << 26)) != 58u << 26)
12580 insn += (14u << 26) - (58u << 26);
12581 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12582 r_type = R_PPC64_TOC16_LO;
12583 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12586 case R_PPC64_TOC16:
12587 case R_PPC64_TOC16_LO:
12588 case R_PPC64_TOC16_DS:
12589 case R_PPC64_TOC16_LO_DS:
12591 /* Check for toc tls entries. */
12592 unsigned char *toc_tls;
12595 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12596 &local_syms, rel, input_bfd);
12602 tls_mask = *toc_tls;
12603 if (r_type == R_PPC64_TOC16_DS
12604 || r_type == R_PPC64_TOC16_LO_DS)
12607 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12612 /* If we found a GD reloc pair, then we might be
12613 doing a GD->IE transition. */
12616 tls_gd = TLS_TPRELGD;
12617 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12620 else if (retval == 3)
12622 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12630 case R_PPC64_GOT_TPREL16_HI:
12631 case R_PPC64_GOT_TPREL16_HA:
12633 && (tls_mask & TLS_TPREL) == 0)
12635 rel->r_offset -= d_offset;
12636 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12637 r_type = R_PPC64_NONE;
12638 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12642 case R_PPC64_GOT_TPREL16_DS:
12643 case R_PPC64_GOT_TPREL16_LO_DS:
12645 && (tls_mask & TLS_TPREL) == 0)
12648 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12650 insn |= 0x3c0d0000; /* addis 0,13,0 */
12651 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12652 r_type = R_PPC64_TPREL16_HA;
12653 if (toc_symndx != 0)
12655 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12656 rel->r_addend = toc_addend;
12657 /* We changed the symbol. Start over in order to
12658 get h, sym, sec etc. right. */
12663 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12669 && (tls_mask & TLS_TPREL) == 0)
12671 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12672 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12675 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12676 /* Was PPC64_TLS which sits on insn boundary, now
12677 PPC64_TPREL16_LO which is at low-order half-word. */
12678 rel->r_offset += d_offset;
12679 r_type = R_PPC64_TPREL16_LO;
12680 if (toc_symndx != 0)
12682 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12683 rel->r_addend = toc_addend;
12684 /* We changed the symbol. Start over in order to
12685 get h, sym, sec etc. right. */
12690 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12694 case R_PPC64_GOT_TLSGD16_HI:
12695 case R_PPC64_GOT_TLSGD16_HA:
12696 tls_gd = TLS_TPRELGD;
12697 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12701 case R_PPC64_GOT_TLSLD16_HI:
12702 case R_PPC64_GOT_TLSLD16_HA:
12703 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12706 if ((tls_mask & tls_gd) != 0)
12707 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12708 + R_PPC64_GOT_TPREL16_DS);
12711 rel->r_offset -= d_offset;
12712 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12713 r_type = R_PPC64_NONE;
12715 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12719 case R_PPC64_GOT_TLSGD16:
12720 case R_PPC64_GOT_TLSGD16_LO:
12721 tls_gd = TLS_TPRELGD;
12722 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12726 case R_PPC64_GOT_TLSLD16:
12727 case R_PPC64_GOT_TLSLD16_LO:
12728 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12730 unsigned int insn1, insn2, insn3;
12734 offset = (bfd_vma) -1;
12735 /* If not using the newer R_PPC64_TLSGD/LD to mark
12736 __tls_get_addr calls, we must trust that the call
12737 stays with its arg setup insns, ie. that the next
12738 reloc is the __tls_get_addr call associated with
12739 the current reloc. Edit both insns. */
12740 if (input_section->has_tls_get_addr_call
12741 && rel + 1 < relend
12742 && branch_reloc_hash_match (input_bfd, rel + 1,
12743 htab->tls_get_addr,
12744 htab->tls_get_addr_fd))
12745 offset = rel[1].r_offset;
12746 if ((tls_mask & tls_gd) != 0)
12749 insn1 = bfd_get_32 (output_bfd,
12750 contents + rel->r_offset - d_offset);
12751 insn1 &= (1 << 26) - (1 << 2);
12752 insn1 |= 58 << 26; /* ld */
12753 insn2 = 0x7c636a14; /* add 3,3,13 */
12754 if (offset != (bfd_vma) -1)
12755 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12756 if ((tls_mask & TLS_EXPLICIT) == 0)
12757 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12758 + R_PPC64_GOT_TPREL16_DS);
12760 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12761 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12766 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12767 insn2 = 0x38630000; /* addi 3,3,0 */
12770 /* Was an LD reloc. */
12772 sec = local_sections[toc_symndx];
12774 r_symndx < symtab_hdr->sh_info;
12776 if (local_sections[r_symndx] == sec)
12778 if (r_symndx >= symtab_hdr->sh_info)
12779 r_symndx = STN_UNDEF;
12780 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12781 if (r_symndx != STN_UNDEF)
12782 rel->r_addend -= (local_syms[r_symndx].st_value
12783 + sec->output_offset
12784 + sec->output_section->vma);
12786 else if (toc_symndx != 0)
12788 r_symndx = toc_symndx;
12789 rel->r_addend = toc_addend;
12791 r_type = R_PPC64_TPREL16_HA;
12792 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12793 if (offset != (bfd_vma) -1)
12795 rel[1].r_info = ELF64_R_INFO (r_symndx,
12796 R_PPC64_TPREL16_LO);
12797 rel[1].r_offset = offset + d_offset;
12798 rel[1].r_addend = rel->r_addend;
12801 bfd_put_32 (output_bfd, insn1,
12802 contents + rel->r_offset - d_offset);
12803 if (offset != (bfd_vma) -1)
12805 insn3 = bfd_get_32 (output_bfd,
12806 contents + offset + 4);
12808 || insn3 == CROR_151515 || insn3 == CROR_313131)
12810 rel[1].r_offset += 4;
12811 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12814 bfd_put_32 (output_bfd, insn2, contents + offset);
12816 if ((tls_mask & tls_gd) == 0
12817 && (tls_gd == 0 || toc_symndx != 0))
12819 /* We changed the symbol. Start over in order
12820 to get h, sym, sec etc. right. */
12827 case R_PPC64_TLSGD:
12828 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12830 unsigned int insn2, insn3;
12831 bfd_vma offset = rel->r_offset;
12833 if ((tls_mask & TLS_TPRELGD) != 0)
12836 r_type = R_PPC64_NONE;
12837 insn2 = 0x7c636a14; /* add 3,3,13 */
12842 if (toc_symndx != 0)
12844 r_symndx = toc_symndx;
12845 rel->r_addend = toc_addend;
12847 r_type = R_PPC64_TPREL16_LO;
12848 rel->r_offset = offset + d_offset;
12849 insn2 = 0x38630000; /* addi 3,3,0 */
12851 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12852 /* Zap the reloc on the _tls_get_addr call too. */
12853 BFD_ASSERT (offset == rel[1].r_offset);
12854 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12855 insn3 = bfd_get_32 (output_bfd,
12856 contents + offset + 4);
12858 || insn3 == CROR_151515 || insn3 == CROR_313131)
12860 rel->r_offset += 4;
12861 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12864 bfd_put_32 (output_bfd, insn2, contents + offset);
12865 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12873 case R_PPC64_TLSLD:
12874 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12876 unsigned int insn2, insn3;
12877 bfd_vma offset = rel->r_offset;
12880 sec = local_sections[toc_symndx];
12882 r_symndx < symtab_hdr->sh_info;
12884 if (local_sections[r_symndx] == sec)
12886 if (r_symndx >= symtab_hdr->sh_info)
12887 r_symndx = STN_UNDEF;
12888 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12889 if (r_symndx != STN_UNDEF)
12890 rel->r_addend -= (local_syms[r_symndx].st_value
12891 + sec->output_offset
12892 + sec->output_section->vma);
12894 r_type = R_PPC64_TPREL16_LO;
12895 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12896 rel->r_offset = offset + d_offset;
12897 /* Zap the reloc on the _tls_get_addr call too. */
12898 BFD_ASSERT (offset == rel[1].r_offset);
12899 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12900 insn2 = 0x38630000; /* addi 3,3,0 */
12901 insn3 = bfd_get_32 (output_bfd,
12902 contents + offset + 4);
12904 || insn3 == CROR_151515 || insn3 == CROR_313131)
12906 rel->r_offset += 4;
12907 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12910 bfd_put_32 (output_bfd, insn2, contents + offset);
12916 case R_PPC64_DTPMOD64:
12917 if (rel + 1 < relend
12918 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12919 && rel[1].r_offset == rel->r_offset + 8)
12921 if ((tls_mask & TLS_GD) == 0)
12923 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12924 if ((tls_mask & TLS_TPRELGD) != 0)
12925 r_type = R_PPC64_TPREL64;
12928 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12929 r_type = R_PPC64_NONE;
12931 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12936 if ((tls_mask & TLS_LD) == 0)
12938 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12939 r_type = R_PPC64_NONE;
12940 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12945 case R_PPC64_TPREL64:
12946 if ((tls_mask & TLS_TPREL) == 0)
12948 r_type = R_PPC64_NONE;
12949 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12954 /* Handle other relocations that tweak non-addend part of insn. */
12956 max_br_offset = 1 << 25;
12957 addend = rel->r_addend;
12958 reloc_dest = DEST_NORMAL;
12964 case R_PPC64_TOCSAVE:
12965 if (relocation + addend == (rel->r_offset
12966 + input_section->output_offset
12967 + input_section->output_section->vma)
12968 && tocsave_find (htab, NO_INSERT,
12969 &local_syms, rel, input_bfd))
12971 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12973 || insn == CROR_151515 || insn == CROR_313131)
12974 bfd_put_32 (input_bfd, STD_R2_40R1,
12975 contents + rel->r_offset);
12979 /* Branch taken prediction relocations. */
12980 case R_PPC64_ADDR14_BRTAKEN:
12981 case R_PPC64_REL14_BRTAKEN:
12982 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12985 /* Branch not taken prediction relocations. */
12986 case R_PPC64_ADDR14_BRNTAKEN:
12987 case R_PPC64_REL14_BRNTAKEN:
12988 insn |= bfd_get_32 (output_bfd,
12989 contents + rel->r_offset) & ~(0x01 << 21);
12992 case R_PPC64_REL14:
12993 max_br_offset = 1 << 15;
12996 case R_PPC64_REL24:
12997 /* Calls to functions with a different TOC, such as calls to
12998 shared objects, need to alter the TOC pointer. This is
12999 done using a linkage stub. A REL24 branching to these
13000 linkage stubs needs to be followed by a nop, as the nop
13001 will be replaced with an instruction to restore the TOC
13006 && h->oh->is_func_descriptor)
13007 fdh = ppc_follow_link (h->oh);
13008 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13010 if (stub_entry != NULL
13011 && (stub_entry->stub_type == ppc_stub_plt_call
13012 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13013 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13014 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13016 bfd_boolean can_plt_call = FALSE;
13018 if (rel->r_offset + 8 <= input_section->size)
13021 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13023 || nop == CROR_151515 || nop == CROR_313131)
13026 && (h == htab->tls_get_addr_fd
13027 || h == htab->tls_get_addr)
13028 && !htab->no_tls_get_addr_opt)
13030 /* Special stub used, leave nop alone. */
13033 bfd_put_32 (input_bfd, LD_R2_40R1,
13034 contents + rel->r_offset + 4);
13035 can_plt_call = TRUE;
13041 if (stub_entry->stub_type == ppc_stub_plt_call
13042 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13044 /* If this is a plain branch rather than a branch
13045 and link, don't require a nop. However, don't
13046 allow tail calls in a shared library as they
13047 will result in r2 being corrupted. */
13049 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
13050 if (info->executable && (br & 1) == 0)
13051 can_plt_call = TRUE;
13056 && strcmp (h->elf.root.root.string,
13057 ".__libc_start_main") == 0)
13059 /* Allow crt1 branch to go via a toc adjusting stub. */
13060 can_plt_call = TRUE;
13064 info->callbacks->einfo
13065 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13066 "recompile with -fPIC"),
13067 input_bfd, input_section, rel->r_offset, sym_name);
13069 bfd_set_error (bfd_error_bad_value);
13075 && (stub_entry->stub_type == ppc_stub_plt_call
13076 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13077 unresolved_reloc = FALSE;
13080 if ((stub_entry == NULL
13081 || stub_entry->stub_type == ppc_stub_long_branch
13082 || stub_entry->stub_type == ppc_stub_plt_branch)
13083 && get_opd_info (sec) != NULL)
13085 /* The branch destination is the value of the opd entry. */
13086 bfd_vma off = (relocation + addend
13087 - sec->output_section->vma
13088 - sec->output_offset);
13089 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13090 if (dest != (bfd_vma) -1)
13094 reloc_dest = DEST_OPD;
13098 /* If the branch is out of reach we ought to have a long
13100 from = (rel->r_offset
13101 + input_section->output_offset
13102 + input_section->output_section->vma);
13104 if (stub_entry != NULL
13105 && (stub_entry->stub_type == ppc_stub_long_branch
13106 || stub_entry->stub_type == ppc_stub_plt_branch)
13107 && (r_type == R_PPC64_ADDR14_BRTAKEN
13108 || r_type == R_PPC64_ADDR14_BRNTAKEN
13109 || (relocation + addend - from + max_br_offset
13110 < 2 * max_br_offset)))
13111 /* Don't use the stub if this branch is in range. */
13114 if (stub_entry != NULL)
13116 /* Munge up the value and addend so that we call the stub
13117 rather than the procedure directly. */
13118 relocation = (stub_entry->stub_offset
13119 + stub_entry->stub_sec->output_offset
13120 + stub_entry->stub_sec->output_section->vma);
13122 reloc_dest = DEST_STUB;
13124 if ((stub_entry->stub_type == ppc_stub_plt_call
13125 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13126 && (ALWAYS_EMIT_R2SAVE
13127 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13128 && rel + 1 < relend
13129 && rel[1].r_offset == rel->r_offset + 4
13130 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13138 /* Set 'a' bit. This is 0b00010 in BO field for branch
13139 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13140 for branch on CTR insns (BO == 1a00t or 1a01t). */
13141 if ((insn & (0x14 << 21)) == (0x04 << 21))
13142 insn |= 0x02 << 21;
13143 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13144 insn |= 0x08 << 21;
13150 /* Invert 'y' bit if not the default. */
13151 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13152 insn ^= 0x01 << 21;
13155 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13158 /* NOP out calls to undefined weak functions.
13159 We can thus call a weak function without first
13160 checking whether the function is defined. */
13162 && h->elf.root.type == bfd_link_hash_undefweak
13163 && h->elf.dynindx == -1
13164 && r_type == R_PPC64_REL24
13168 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13174 /* Set `addend'. */
13179 info->callbacks->einfo
13180 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13181 input_bfd, (int) r_type, sym_name);
13183 bfd_set_error (bfd_error_bad_value);
13189 case R_PPC64_TLSGD:
13190 case R_PPC64_TLSLD:
13191 case R_PPC64_TOCSAVE:
13192 case R_PPC64_GNU_VTINHERIT:
13193 case R_PPC64_GNU_VTENTRY:
13196 /* GOT16 relocations. Like an ADDR16 using the symbol's
13197 address in the GOT as relocation value instead of the
13198 symbol's value itself. Also, create a GOT entry for the
13199 symbol and put the symbol value there. */
13200 case R_PPC64_GOT_TLSGD16:
13201 case R_PPC64_GOT_TLSGD16_LO:
13202 case R_PPC64_GOT_TLSGD16_HI:
13203 case R_PPC64_GOT_TLSGD16_HA:
13204 tls_type = TLS_TLS | TLS_GD;
13207 case R_PPC64_GOT_TLSLD16:
13208 case R_PPC64_GOT_TLSLD16_LO:
13209 case R_PPC64_GOT_TLSLD16_HI:
13210 case R_PPC64_GOT_TLSLD16_HA:
13211 tls_type = TLS_TLS | TLS_LD;
13214 case R_PPC64_GOT_TPREL16_DS:
13215 case R_PPC64_GOT_TPREL16_LO_DS:
13216 case R_PPC64_GOT_TPREL16_HI:
13217 case R_PPC64_GOT_TPREL16_HA:
13218 tls_type = TLS_TLS | TLS_TPREL;
13221 case R_PPC64_GOT_DTPREL16_DS:
13222 case R_PPC64_GOT_DTPREL16_LO_DS:
13223 case R_PPC64_GOT_DTPREL16_HI:
13224 case R_PPC64_GOT_DTPREL16_HA:
13225 tls_type = TLS_TLS | TLS_DTPREL;
13228 case R_PPC64_GOT16:
13229 case R_PPC64_GOT16_LO:
13230 case R_PPC64_GOT16_HI:
13231 case R_PPC64_GOT16_HA:
13232 case R_PPC64_GOT16_DS:
13233 case R_PPC64_GOT16_LO_DS:
13236 /* Relocation is to the entry for this symbol in the global
13241 unsigned long indx = 0;
13242 struct got_entry *ent;
13244 if (tls_type == (TLS_TLS | TLS_LD)
13246 || !h->elf.def_dynamic))
13247 ent = ppc64_tlsld_got (input_bfd);
13253 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13254 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13257 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13258 /* This is actually a static link, or it is a
13259 -Bsymbolic link and the symbol is defined
13260 locally, or the symbol was forced to be local
13261 because of a version file. */
13265 BFD_ASSERT (h->elf.dynindx != -1);
13266 indx = h->elf.dynindx;
13267 unresolved_reloc = FALSE;
13269 ent = h->elf.got.glist;
13273 if (local_got_ents == NULL)
13275 ent = local_got_ents[r_symndx];
13278 for (; ent != NULL; ent = ent->next)
13279 if (ent->addend == orig_rel.r_addend
13280 && ent->owner == input_bfd
13281 && ent->tls_type == tls_type)
13287 if (ent->is_indirect)
13288 ent = ent->got.ent;
13289 offp = &ent->got.offset;
13290 got = ppc64_elf_tdata (ent->owner)->got;
13294 /* The offset must always be a multiple of 8. We use the
13295 least significant bit to record whether we have already
13296 processed this entry. */
13298 if ((off & 1) != 0)
13302 /* Generate relocs for the dynamic linker, except in
13303 the case of TLSLD where we'll use one entry per
13311 ? h->elf.type == STT_GNU_IFUNC
13312 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13314 relgot = htab->reliplt;
13315 else if ((info->shared || indx != 0)
13317 || (tls_type == (TLS_TLS | TLS_LD)
13318 && !h->elf.def_dynamic)
13319 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13320 || h->elf.root.type != bfd_link_hash_undefweak))
13321 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13322 if (relgot != NULL)
13324 outrel.r_offset = (got->output_section->vma
13325 + got->output_offset
13327 outrel.r_addend = addend;
13328 if (tls_type & (TLS_LD | TLS_GD))
13330 outrel.r_addend = 0;
13331 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13332 if (tls_type == (TLS_TLS | TLS_GD))
13334 loc = relgot->contents;
13335 loc += (relgot->reloc_count++
13336 * sizeof (Elf64_External_Rela));
13337 bfd_elf64_swap_reloca_out (output_bfd,
13339 outrel.r_offset += 8;
13340 outrel.r_addend = addend;
13342 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13345 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13346 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13347 else if (tls_type == (TLS_TLS | TLS_TPREL))
13348 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13349 else if (indx != 0)
13350 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13354 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13356 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13358 /* Write the .got section contents for the sake
13360 loc = got->contents + off;
13361 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13365 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13367 outrel.r_addend += relocation;
13368 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13369 outrel.r_addend -= htab->elf.tls_sec->vma;
13371 loc = relgot->contents;
13372 loc += (relgot->reloc_count++
13373 * sizeof (Elf64_External_Rela));
13374 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13377 /* Init the .got section contents here if we're not
13378 emitting a reloc. */
13381 relocation += addend;
13382 if (tls_type == (TLS_TLS | TLS_LD))
13384 else if (tls_type != 0)
13386 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13387 if (tls_type == (TLS_TLS | TLS_TPREL))
13388 relocation += DTP_OFFSET - TP_OFFSET;
13390 if (tls_type == (TLS_TLS | TLS_GD))
13392 bfd_put_64 (output_bfd, relocation,
13393 got->contents + off + 8);
13398 bfd_put_64 (output_bfd, relocation,
13399 got->contents + off);
13403 if (off >= (bfd_vma) -2)
13406 relocation = got->output_section->vma + got->output_offset + off;
13407 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13411 case R_PPC64_PLT16_HA:
13412 case R_PPC64_PLT16_HI:
13413 case R_PPC64_PLT16_LO:
13414 case R_PPC64_PLT32:
13415 case R_PPC64_PLT64:
13416 /* Relocation is to the entry for this symbol in the
13417 procedure linkage table. */
13419 /* Resolve a PLT reloc against a local symbol directly,
13420 without using the procedure linkage table. */
13424 /* It's possible that we didn't make a PLT entry for this
13425 symbol. This happens when statically linking PIC code,
13426 or when using -Bsymbolic. Go find a match if there is a
13428 if (htab->plt != NULL)
13430 struct plt_entry *ent;
13431 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13432 if (ent->addend == orig_rel.r_addend
13433 && ent->plt.offset != (bfd_vma) -1)
13435 relocation = (htab->plt->output_section->vma
13436 + htab->plt->output_offset
13437 + ent->plt.offset);
13438 unresolved_reloc = FALSE;
13444 /* Relocation value is TOC base. */
13445 relocation = TOCstart;
13446 if (r_symndx == STN_UNDEF)
13447 relocation += htab->stub_group[input_section->id].toc_off;
13448 else if (unresolved_reloc)
13450 else if (sec != NULL && sec->id <= htab->top_id)
13451 relocation += htab->stub_group[sec->id].toc_off;
13453 unresolved_reloc = TRUE;
13456 /* TOC16 relocs. We want the offset relative to the TOC base,
13457 which is the address of the start of the TOC plus 0x8000.
13458 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13460 case R_PPC64_TOC16:
13461 case R_PPC64_TOC16_LO:
13462 case R_PPC64_TOC16_HI:
13463 case R_PPC64_TOC16_DS:
13464 case R_PPC64_TOC16_LO_DS:
13465 case R_PPC64_TOC16_HA:
13466 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13469 /* Relocate against the beginning of the section. */
13470 case R_PPC64_SECTOFF:
13471 case R_PPC64_SECTOFF_LO:
13472 case R_PPC64_SECTOFF_HI:
13473 case R_PPC64_SECTOFF_DS:
13474 case R_PPC64_SECTOFF_LO_DS:
13475 case R_PPC64_SECTOFF_HA:
13477 addend -= sec->output_section->vma;
13480 case R_PPC64_REL16:
13481 case R_PPC64_REL16_LO:
13482 case R_PPC64_REL16_HI:
13483 case R_PPC64_REL16_HA:
13486 case R_PPC64_REL14:
13487 case R_PPC64_REL14_BRNTAKEN:
13488 case R_PPC64_REL14_BRTAKEN:
13489 case R_PPC64_REL24:
13492 case R_PPC64_TPREL16:
13493 case R_PPC64_TPREL16_LO:
13494 case R_PPC64_TPREL16_HI:
13495 case R_PPC64_TPREL16_HA:
13496 case R_PPC64_TPREL16_DS:
13497 case R_PPC64_TPREL16_LO_DS:
13498 case R_PPC64_TPREL16_HIGHER:
13499 case R_PPC64_TPREL16_HIGHERA:
13500 case R_PPC64_TPREL16_HIGHEST:
13501 case R_PPC64_TPREL16_HIGHESTA:
13503 && h->elf.root.type == bfd_link_hash_undefweak
13504 && h->elf.dynindx == -1)
13506 /* Make this relocation against an undefined weak symbol
13507 resolve to zero. This is really just a tweak, since
13508 code using weak externs ought to check that they are
13509 defined before using them. */
13510 bfd_byte *p = contents + rel->r_offset - d_offset;
13512 insn = bfd_get_32 (output_bfd, p);
13513 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13515 bfd_put_32 (output_bfd, insn, p);
13518 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13520 /* The TPREL16 relocs shouldn't really be used in shared
13521 libs as they will result in DT_TEXTREL being set, but
13522 support them anyway. */
13526 case R_PPC64_DTPREL16:
13527 case R_PPC64_DTPREL16_LO:
13528 case R_PPC64_DTPREL16_HI:
13529 case R_PPC64_DTPREL16_HA:
13530 case R_PPC64_DTPREL16_DS:
13531 case R_PPC64_DTPREL16_LO_DS:
13532 case R_PPC64_DTPREL16_HIGHER:
13533 case R_PPC64_DTPREL16_HIGHERA:
13534 case R_PPC64_DTPREL16_HIGHEST:
13535 case R_PPC64_DTPREL16_HIGHESTA:
13536 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13539 case R_PPC64_DTPMOD64:
13544 case R_PPC64_TPREL64:
13545 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13548 case R_PPC64_DTPREL64:
13549 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13552 /* Relocations that may need to be propagated if this is a
13554 case R_PPC64_REL30:
13555 case R_PPC64_REL32:
13556 case R_PPC64_REL64:
13557 case R_PPC64_ADDR14:
13558 case R_PPC64_ADDR14_BRNTAKEN:
13559 case R_PPC64_ADDR14_BRTAKEN:
13560 case R_PPC64_ADDR16:
13561 case R_PPC64_ADDR16_DS:
13562 case R_PPC64_ADDR16_HA:
13563 case R_PPC64_ADDR16_HI:
13564 case R_PPC64_ADDR16_HIGHER:
13565 case R_PPC64_ADDR16_HIGHERA:
13566 case R_PPC64_ADDR16_HIGHEST:
13567 case R_PPC64_ADDR16_HIGHESTA:
13568 case R_PPC64_ADDR16_LO:
13569 case R_PPC64_ADDR16_LO_DS:
13570 case R_PPC64_ADDR24:
13571 case R_PPC64_ADDR32:
13572 case R_PPC64_ADDR64:
13573 case R_PPC64_UADDR16:
13574 case R_PPC64_UADDR32:
13575 case R_PPC64_UADDR64:
13577 if ((input_section->flags & SEC_ALLOC) == 0)
13580 if (NO_OPD_RELOCS && is_opd)
13585 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13586 || h->elf.root.type != bfd_link_hash_undefweak)
13587 && (must_be_dyn_reloc (info, r_type)
13588 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13589 || (ELIMINATE_COPY_RELOCS
13592 && h->elf.dynindx != -1
13593 && !h->elf.non_got_ref
13594 && !h->elf.def_regular)
13597 ? h->elf.type == STT_GNU_IFUNC
13598 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13600 bfd_boolean skip, relocate;
13604 /* When generating a dynamic object, these relocations
13605 are copied into the output file to be resolved at run
13611 out_off = _bfd_elf_section_offset (output_bfd, info,
13612 input_section, rel->r_offset);
13613 if (out_off == (bfd_vma) -1)
13615 else if (out_off == (bfd_vma) -2)
13616 skip = TRUE, relocate = TRUE;
13617 out_off += (input_section->output_section->vma
13618 + input_section->output_offset);
13619 outrel.r_offset = out_off;
13620 outrel.r_addend = rel->r_addend;
13622 /* Optimize unaligned reloc use. */
13623 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13624 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13625 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13626 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13627 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13628 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13629 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13630 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13631 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13634 memset (&outrel, 0, sizeof outrel);
13635 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13637 && r_type != R_PPC64_TOC)
13639 BFD_ASSERT (h->elf.dynindx != -1);
13640 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13644 /* This symbol is local, or marked to become local,
13645 or this is an opd section reloc which must point
13646 at a local function. */
13647 outrel.r_addend += relocation;
13648 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13650 if (is_opd && h != NULL)
13652 /* Lie about opd entries. This case occurs
13653 when building shared libraries and we
13654 reference a function in another shared
13655 lib. The same thing happens for a weak
13656 definition in an application that's
13657 overridden by a strong definition in a
13658 shared lib. (I believe this is a generic
13659 bug in binutils handling of weak syms.)
13660 In these cases we won't use the opd
13661 entry in this lib. */
13662 unresolved_reloc = FALSE;
13665 && r_type == R_PPC64_ADDR64
13667 ? h->elf.type == STT_GNU_IFUNC
13668 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13669 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13672 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13674 /* We need to relocate .opd contents for ld.so.
13675 Prelink also wants simple and consistent rules
13676 for relocs. This make all RELATIVE relocs have
13677 *r_offset equal to r_addend. */
13686 ? h->elf.type == STT_GNU_IFUNC
13687 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13689 info->callbacks->einfo
13690 (_("%P: %H: %s for indirect "
13691 "function `%T' unsupported\n"),
13692 input_bfd, input_section, rel->r_offset,
13693 ppc64_elf_howto_table[r_type]->name,
13697 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13699 else if (sec == NULL || sec->owner == NULL)
13701 bfd_set_error (bfd_error_bad_value);
13708 osec = sec->output_section;
13709 indx = elf_section_data (osec)->dynindx;
13713 if ((osec->flags & SEC_READONLY) == 0
13714 && htab->elf.data_index_section != NULL)
13715 osec = htab->elf.data_index_section;
13717 osec = htab->elf.text_index_section;
13718 indx = elf_section_data (osec)->dynindx;
13720 BFD_ASSERT (indx != 0);
13722 /* We are turning this relocation into one
13723 against a section symbol, so subtract out
13724 the output section's address but not the
13725 offset of the input section in the output
13727 outrel.r_addend -= osec->vma;
13730 outrel.r_info = ELF64_R_INFO (indx, r_type);
13734 sreloc = elf_section_data (input_section)->sreloc;
13736 ? h->elf.type == STT_GNU_IFUNC
13737 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13738 sreloc = htab->reliplt;
13739 if (sreloc == NULL)
13742 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13745 loc = sreloc->contents;
13746 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13747 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13749 /* If this reloc is against an external symbol, it will
13750 be computed at runtime, so there's no need to do
13751 anything now. However, for the sake of prelink ensure
13752 that the section contents are a known value. */
13755 unresolved_reloc = FALSE;
13756 /* The value chosen here is quite arbitrary as ld.so
13757 ignores section contents except for the special
13758 case of .opd where the contents might be accessed
13759 before relocation. Choose zero, as that won't
13760 cause reloc overflow. */
13763 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13764 to improve backward compatibility with older
13766 if (r_type == R_PPC64_ADDR64)
13767 addend = outrel.r_addend;
13768 /* Adjust pc_relative relocs to have zero in *r_offset. */
13769 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13770 addend = (input_section->output_section->vma
13771 + input_section->output_offset
13778 case R_PPC64_GLOB_DAT:
13779 case R_PPC64_JMP_SLOT:
13780 case R_PPC64_JMP_IREL:
13781 case R_PPC64_RELATIVE:
13782 /* We shouldn't ever see these dynamic relocs in relocatable
13784 /* Fall through. */
13786 case R_PPC64_PLTGOT16:
13787 case R_PPC64_PLTGOT16_DS:
13788 case R_PPC64_PLTGOT16_HA:
13789 case R_PPC64_PLTGOT16_HI:
13790 case R_PPC64_PLTGOT16_LO:
13791 case R_PPC64_PLTGOT16_LO_DS:
13792 case R_PPC64_PLTREL32:
13793 case R_PPC64_PLTREL64:
13794 /* These ones haven't been implemented yet. */
13796 info->callbacks->einfo
13797 (_("%P: %B: %s is not supported for `%T'\n"),
13799 ppc64_elf_howto_table[r_type]->name, sym_name);
13801 bfd_set_error (bfd_error_invalid_operation);
13806 /* Multi-instruction sequences that access the TOC can be
13807 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13808 to nop; addi rb,r2,x; */
13814 case R_PPC64_GOT_TLSLD16_HI:
13815 case R_PPC64_GOT_TLSGD16_HI:
13816 case R_PPC64_GOT_TPREL16_HI:
13817 case R_PPC64_GOT_DTPREL16_HI:
13818 case R_PPC64_GOT16_HI:
13819 case R_PPC64_TOC16_HI:
13820 /* These relocs would only be useful if building up an
13821 offset to later add to r2, perhaps in an indexed
13822 addressing mode instruction. Don't try to optimize.
13823 Unfortunately, the possibility of someone building up an
13824 offset like this or even with the HA relocs, means that
13825 we need to check the high insn when optimizing the low
13829 case R_PPC64_GOT_TLSLD16_HA:
13830 case R_PPC64_GOT_TLSGD16_HA:
13831 case R_PPC64_GOT_TPREL16_HA:
13832 case R_PPC64_GOT_DTPREL16_HA:
13833 case R_PPC64_GOT16_HA:
13834 case R_PPC64_TOC16_HA:
13835 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13836 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13838 bfd_byte *p = contents + (rel->r_offset & ~3);
13839 bfd_put_32 (input_bfd, NOP, p);
13843 case R_PPC64_GOT_TLSLD16_LO:
13844 case R_PPC64_GOT_TLSGD16_LO:
13845 case R_PPC64_GOT_TPREL16_LO_DS:
13846 case R_PPC64_GOT_DTPREL16_LO_DS:
13847 case R_PPC64_GOT16_LO:
13848 case R_PPC64_GOT16_LO_DS:
13849 case R_PPC64_TOC16_LO:
13850 case R_PPC64_TOC16_LO_DS:
13851 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13852 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13854 bfd_byte *p = contents + (rel->r_offset & ~3);
13855 insn = bfd_get_32 (input_bfd, p);
13856 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13858 /* Transform addic to addi when we change reg. */
13859 insn &= ~((0x3f << 26) | (0x1f << 16));
13860 insn |= (14u << 26) | (2 << 16);
13864 insn &= ~(0x1f << 16);
13867 bfd_put_32 (input_bfd, insn, p);
13872 /* Do any further special processing. */
13878 case R_PPC64_ADDR16_HA:
13879 case R_PPC64_REL16_HA:
13880 case R_PPC64_ADDR16_HIGHERA:
13881 case R_PPC64_ADDR16_HIGHESTA:
13882 case R_PPC64_TOC16_HA:
13883 case R_PPC64_SECTOFF_HA:
13884 case R_PPC64_TPREL16_HA:
13885 case R_PPC64_DTPREL16_HA:
13886 case R_PPC64_TPREL16_HIGHER:
13887 case R_PPC64_TPREL16_HIGHERA:
13888 case R_PPC64_TPREL16_HIGHEST:
13889 case R_PPC64_TPREL16_HIGHESTA:
13890 case R_PPC64_DTPREL16_HIGHER:
13891 case R_PPC64_DTPREL16_HIGHERA:
13892 case R_PPC64_DTPREL16_HIGHEST:
13893 case R_PPC64_DTPREL16_HIGHESTA:
13894 /* It's just possible that this symbol is a weak symbol
13895 that's not actually defined anywhere. In that case,
13896 'sec' would be NULL, and we should leave the symbol
13897 alone (it will be set to zero elsewhere in the link). */
13902 case R_PPC64_GOT16_HA:
13903 case R_PPC64_PLTGOT16_HA:
13904 case R_PPC64_PLT16_HA:
13905 case R_PPC64_GOT_TLSGD16_HA:
13906 case R_PPC64_GOT_TLSLD16_HA:
13907 case R_PPC64_GOT_TPREL16_HA:
13908 case R_PPC64_GOT_DTPREL16_HA:
13909 /* Add 0x10000 if sign bit in 0:15 is set.
13910 Bits 0:15 are not used. */
13914 case R_PPC64_ADDR16_DS:
13915 case R_PPC64_ADDR16_LO_DS:
13916 case R_PPC64_GOT16_DS:
13917 case R_PPC64_GOT16_LO_DS:
13918 case R_PPC64_PLT16_LO_DS:
13919 case R_PPC64_SECTOFF_DS:
13920 case R_PPC64_SECTOFF_LO_DS:
13921 case R_PPC64_TOC16_DS:
13922 case R_PPC64_TOC16_LO_DS:
13923 case R_PPC64_PLTGOT16_DS:
13924 case R_PPC64_PLTGOT16_LO_DS:
13925 case R_PPC64_GOT_TPREL16_DS:
13926 case R_PPC64_GOT_TPREL16_LO_DS:
13927 case R_PPC64_GOT_DTPREL16_DS:
13928 case R_PPC64_GOT_DTPREL16_LO_DS:
13929 case R_PPC64_TPREL16_DS:
13930 case R_PPC64_TPREL16_LO_DS:
13931 case R_PPC64_DTPREL16_DS:
13932 case R_PPC64_DTPREL16_LO_DS:
13933 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13935 /* If this reloc is against an lq insn, then the value must be
13936 a multiple of 16. This is somewhat of a hack, but the
13937 "correct" way to do this by defining _DQ forms of all the
13938 _DS relocs bloats all reloc switches in this file. It
13939 doesn't seem to make much sense to use any of these relocs
13940 in data, so testing the insn should be safe. */
13941 if ((insn & (0x3f << 26)) == (56u << 26))
13943 if (((relocation + addend) & mask) != 0)
13945 info->callbacks->einfo
13946 (_("%P: %H: error: %s not a multiple of %u\n"),
13947 input_bfd, input_section, rel->r_offset,
13948 ppc64_elf_howto_table[r_type]->name,
13950 bfd_set_error (bfd_error_bad_value);
13957 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13958 because such sections are not SEC_ALLOC and thus ld.so will
13959 not process them. */
13960 if (unresolved_reloc
13961 && !((input_section->flags & SEC_DEBUGGING) != 0
13962 && h->elf.def_dynamic)
13963 && _bfd_elf_section_offset (output_bfd, info, input_section,
13964 rel->r_offset) != (bfd_vma) -1)
13966 info->callbacks->einfo
13967 (_("%P: %H: unresolvable %s against `%T'\n"),
13968 input_bfd, input_section, rel->r_offset,
13969 ppc64_elf_howto_table[(int) r_type]->name,
13970 h->elf.root.root.string);
13974 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13982 if (r != bfd_reloc_ok)
13984 char *more_info = NULL;
13985 const char *reloc_name = ppc64_elf_howto_table[r_type]->name;
13987 if (reloc_dest != DEST_NORMAL)
13989 more_info = bfd_malloc (strlen (reloc_name) + 8);
13990 if (more_info != NULL)
13992 strcpy (more_info, reloc_name);
13993 strcat (more_info, (reloc_dest == DEST_OPD
13994 ? " (OPD)" : " (stub)"));
13995 reloc_name = more_info;
13999 if (r == bfd_reloc_overflow)
14004 && h->elf.root.type == bfd_link_hash_undefweak
14005 && ppc64_elf_howto_table[r_type]->pc_relative)
14007 /* Assume this is a call protected by other code that
14008 detects the symbol is undefined. If this is the case,
14009 we can safely ignore the overflow. If not, the
14010 program is hosed anyway, and a little warning isn't
14016 if (!((*info->callbacks->reloc_overflow)
14017 (info, &h->elf.root, sym_name,
14018 reloc_name, orig_rel.r_addend,
14019 input_bfd, input_section, rel->r_offset)))
14024 info->callbacks->einfo
14025 (_("%P: %H: %s against `%T': error %d\n"),
14026 input_bfd, input_section, rel->r_offset,
14027 reloc_name, sym_name, (int) r);
14030 if (more_info != NULL)
14035 /* If we're emitting relocations, then shortly after this function
14036 returns, reloc offsets and addends for this section will be
14037 adjusted. Worse, reloc symbol indices will be for the output
14038 file rather than the input. Save a copy of the relocs for
14039 opd_entry_value. */
14040 if (is_opd && (info->emitrelocations || info->relocatable))
14043 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14044 rel = bfd_alloc (input_bfd, amt);
14045 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
14046 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
14049 memcpy (rel, relocs, amt);
14054 /* Adjust the value of any local symbols in opd sections. */
14057 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14058 const char *name ATTRIBUTE_UNUSED,
14059 Elf_Internal_Sym *elfsym,
14060 asection *input_sec,
14061 struct elf_link_hash_entry *h)
14063 struct _opd_sec_data *opd;
14070 opd = get_opd_info (input_sec);
14071 if (opd == NULL || opd->adjust == NULL)
14074 value = elfsym->st_value - input_sec->output_offset;
14075 if (!info->relocatable)
14076 value -= input_sec->output_section->vma;
14078 adjust = opd->adjust[value / 8];
14082 elfsym->st_value += adjust;
14086 /* Finish up dynamic symbol handling. We set the contents of various
14087 dynamic sections here. */
14090 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14091 struct bfd_link_info *info,
14092 struct elf_link_hash_entry *h,
14093 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14095 struct ppc_link_hash_table *htab;
14096 struct plt_entry *ent;
14097 Elf_Internal_Rela rela;
14100 htab = ppc_hash_table (info);
14104 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14105 if (ent->plt.offset != (bfd_vma) -1)
14107 /* This symbol has an entry in the procedure linkage
14108 table. Set it up. */
14109 if (!htab->elf.dynamic_sections_created
14110 || h->dynindx == -1)
14112 BFD_ASSERT (h->type == STT_GNU_IFUNC
14114 && (h->root.type == bfd_link_hash_defined
14115 || h->root.type == bfd_link_hash_defweak));
14116 rela.r_offset = (htab->iplt->output_section->vma
14117 + htab->iplt->output_offset
14118 + ent->plt.offset);
14119 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14120 rela.r_addend = (h->root.u.def.value
14121 + h->root.u.def.section->output_offset
14122 + h->root.u.def.section->output_section->vma
14124 loc = (htab->reliplt->contents
14125 + (htab->reliplt->reloc_count++
14126 * sizeof (Elf64_External_Rela)));
14130 rela.r_offset = (htab->plt->output_section->vma
14131 + htab->plt->output_offset
14132 + ent->plt.offset);
14133 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14134 rela.r_addend = ent->addend;
14135 loc = (htab->relplt->contents
14136 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
14137 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
14139 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14144 /* This symbol needs a copy reloc. Set it up. */
14146 if (h->dynindx == -1
14147 || (h->root.type != bfd_link_hash_defined
14148 && h->root.type != bfd_link_hash_defweak)
14149 || htab->relbss == NULL)
14152 rela.r_offset = (h->root.u.def.value
14153 + h->root.u.def.section->output_section->vma
14154 + h->root.u.def.section->output_offset);
14155 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14157 loc = htab->relbss->contents;
14158 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14159 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14165 /* Used to decide how to sort relocs in an optimal manner for the
14166 dynamic linker, before writing them out. */
14168 static enum elf_reloc_type_class
14169 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14170 const asection *rel_sec,
14171 const Elf_Internal_Rela *rela)
14173 enum elf_ppc64_reloc_type r_type;
14174 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14176 if (rel_sec == htab->reliplt)
14177 return reloc_class_ifunc;
14179 r_type = ELF64_R_TYPE (rela->r_info);
14182 case R_PPC64_RELATIVE:
14183 return reloc_class_relative;
14184 case R_PPC64_JMP_SLOT:
14185 return reloc_class_plt;
14187 return reloc_class_copy;
14189 return reloc_class_normal;
14193 /* Finish up the dynamic sections. */
14196 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14197 struct bfd_link_info *info)
14199 struct ppc_link_hash_table *htab;
14203 htab = ppc_hash_table (info);
14207 dynobj = htab->elf.dynobj;
14208 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14210 if (htab->elf.dynamic_sections_created)
14212 Elf64_External_Dyn *dyncon, *dynconend;
14214 if (sdyn == NULL || htab->got == NULL)
14217 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14218 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14219 for (; dyncon < dynconend; dyncon++)
14221 Elf_Internal_Dyn dyn;
14224 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14231 case DT_PPC64_GLINK:
14233 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14234 /* We stupidly defined DT_PPC64_GLINK to be the start
14235 of glink rather than the first entry point, which is
14236 what ld.so needs, and now have a bigger stub to
14237 support automatic multiple TOCs. */
14238 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
14242 s = bfd_get_section_by_name (output_bfd, ".opd");
14245 dyn.d_un.d_ptr = s->vma;
14248 case DT_PPC64_OPDSZ:
14249 s = bfd_get_section_by_name (output_bfd, ".opd");
14252 dyn.d_un.d_val = s->size;
14257 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14262 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14266 dyn.d_un.d_val = htab->relplt->size;
14270 /* Don't count procedure linkage table relocs in the
14271 overall reloc count. */
14275 dyn.d_un.d_val -= s->size;
14279 /* We may not be using the standard ELF linker script.
14280 If .rela.plt is the first .rela section, we adjust
14281 DT_RELA to not include it. */
14285 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14287 dyn.d_un.d_ptr += s->size;
14291 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14295 if (htab->got != NULL && htab->got->size != 0)
14297 /* Fill in the first entry in the global offset table.
14298 We use it to hold the link-time TOCbase. */
14299 bfd_put_64 (output_bfd,
14300 elf_gp (output_bfd) + TOC_BASE_OFF,
14301 htab->got->contents);
14303 /* Set .got entry size. */
14304 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14307 if (htab->plt != NULL && htab->plt->size != 0)
14309 /* Set .plt entry size. */
14310 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14314 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14315 brlt ourselves if emitrelocations. */
14316 if (htab->brlt != NULL
14317 && htab->brlt->reloc_count != 0
14318 && !_bfd_elf_link_output_relocs (output_bfd,
14320 elf_section_data (htab->brlt)->rela.hdr,
14321 elf_section_data (htab->brlt)->relocs,
14325 if (htab->glink != NULL
14326 && htab->glink->reloc_count != 0
14327 && !_bfd_elf_link_output_relocs (output_bfd,
14329 elf_section_data (htab->glink)->rela.hdr,
14330 elf_section_data (htab->glink)->relocs,
14335 if (htab->glink_eh_frame != NULL
14336 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
14337 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14338 htab->glink_eh_frame,
14339 htab->glink_eh_frame->contents))
14342 /* We need to handle writing out multiple GOT sections ourselves,
14343 since we didn't add them to DYNOBJ. We know dynobj is the first
14345 while ((dynobj = dynobj->link_next) != NULL)
14349 if (!is_ppc64_elf (dynobj))
14352 s = ppc64_elf_tdata (dynobj)->got;
14355 && s->output_section != bfd_abs_section_ptr
14356 && !bfd_set_section_contents (output_bfd, s->output_section,
14357 s->contents, s->output_offset,
14360 s = ppc64_elf_tdata (dynobj)->relgot;
14363 && s->output_section != bfd_abs_section_ptr
14364 && !bfd_set_section_contents (output_bfd, s->output_section,
14365 s->contents, s->output_offset,
14373 #include "elf64-target.h"
14375 /* FreeBSD support */
14377 #undef TARGET_LITTLE_SYM
14378 #undef TARGET_LITTLE_NAME
14380 #undef TARGET_BIG_SYM
14381 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14382 #undef TARGET_BIG_NAME
14383 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14386 #define ELF_OSABI ELFOSABI_FREEBSD
14389 #define elf64_bed elf64_powerpc_fbsd_bed
14391 #include "elf64-target.h"