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->sfpr == NULL)
6554 /* We don't have any relocs. */
6557 /* Provide any missing _save* and _rest* functions. */
6558 htab->sfpr->size = 0;
6559 if (!info->relocatable)
6560 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6561 if (!sfpr_define (info, &funcs[i]))
6564 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6566 if (htab->sfpr->size == 0)
6567 htab->sfpr->flags |= SEC_EXCLUDE;
6572 /* Adjust a symbol defined by a dynamic object and referenced by a
6573 regular object. The current definition is in some section of the
6574 dynamic object, but we're not including those sections. We have to
6575 change the definition to something the rest of the link can
6579 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6580 struct elf_link_hash_entry *h)
6582 struct ppc_link_hash_table *htab;
6585 htab = ppc_hash_table (info);
6589 /* Deal with function syms. */
6590 if (h->type == STT_FUNC
6591 || h->type == STT_GNU_IFUNC
6594 /* Clear procedure linkage table information for any symbol that
6595 won't need a .plt entry. */
6596 struct plt_entry *ent;
6597 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6598 if (ent->plt.refcount > 0)
6601 || (h->type != STT_GNU_IFUNC
6602 && (SYMBOL_CALLS_LOCAL (info, h)
6603 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6604 && h->root.type == bfd_link_hash_undefweak))))
6606 h->plt.plist = NULL;
6611 h->plt.plist = NULL;
6613 /* If this is a weak symbol, and there is a real definition, the
6614 processor independent code will have arranged for us to see the
6615 real definition first, and we can just use the same value. */
6616 if (h->u.weakdef != NULL)
6618 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6619 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6620 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6621 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6622 if (ELIMINATE_COPY_RELOCS)
6623 h->non_got_ref = h->u.weakdef->non_got_ref;
6627 /* If we are creating a shared library, we must presume that the
6628 only references to the symbol are via the global offset table.
6629 For such cases we need not do anything here; the relocations will
6630 be handled correctly by relocate_section. */
6634 /* If there are no references to this symbol that do not use the
6635 GOT, we don't need to generate a copy reloc. */
6636 if (!h->non_got_ref)
6639 /* Don't generate a copy reloc for symbols defined in the executable. */
6640 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6643 if (ELIMINATE_COPY_RELOCS)
6645 struct ppc_link_hash_entry * eh;
6646 struct elf_dyn_relocs *p;
6648 eh = (struct ppc_link_hash_entry *) h;
6649 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6651 s = p->sec->output_section;
6652 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6656 /* If we didn't find any dynamic relocs in read-only sections, then
6657 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6665 if (h->plt.plist != NULL)
6667 /* We should never get here, but unfortunately there are versions
6668 of gcc out there that improperly (for this ABI) put initialized
6669 function pointers, vtable refs and suchlike in read-only
6670 sections. Allow them to proceed, but warn that this might
6671 break at runtime. */
6672 info->callbacks->einfo
6673 (_("%P: copy reloc against `%T' requires lazy plt linking; "
6674 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6675 h->root.root.string);
6678 /* This is a reference to a symbol defined by a dynamic object which
6679 is not a function. */
6681 /* We must allocate the symbol in our .dynbss section, which will
6682 become part of the .bss section of the executable. There will be
6683 an entry for this symbol in the .dynsym section. The dynamic
6684 object will contain position independent code, so all references
6685 from the dynamic object to this symbol will go through the global
6686 offset table. The dynamic linker will use the .dynsym entry to
6687 determine the address it must put in the global offset table, so
6688 both the dynamic object and the regular object will refer to the
6689 same memory location for the variable. */
6691 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6692 to copy the initial value out of the dynamic object and into the
6693 runtime process image. We need to remember the offset into the
6694 .rela.bss section we are going to use. */
6695 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6697 htab->relbss->size += sizeof (Elf64_External_Rela);
6703 return _bfd_elf_adjust_dynamic_copy (h, s);
6706 /* If given a function descriptor symbol, hide both the function code
6707 sym and the descriptor. */
6709 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6710 struct elf_link_hash_entry *h,
6711 bfd_boolean force_local)
6713 struct ppc_link_hash_entry *eh;
6714 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6716 eh = (struct ppc_link_hash_entry *) h;
6717 if (eh->is_func_descriptor)
6719 struct ppc_link_hash_entry *fh = eh->oh;
6724 struct ppc_link_hash_table *htab;
6727 /* We aren't supposed to use alloca in BFD because on
6728 systems which do not have alloca the version in libiberty
6729 calls xmalloc, which might cause the program to crash
6730 when it runs out of memory. This function doesn't have a
6731 return status, so there's no way to gracefully return an
6732 error. So cheat. We know that string[-1] can be safely
6733 accessed; It's either a string in an ELF string table,
6734 or allocated in an objalloc structure. */
6736 p = eh->elf.root.root.string - 1;
6739 htab = ppc_hash_table (info);
6743 fh = (struct ppc_link_hash_entry *)
6744 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6747 /* Unfortunately, if it so happens that the string we were
6748 looking for was allocated immediately before this string,
6749 then we overwrote the string terminator. That's the only
6750 reason the lookup should fail. */
6753 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6754 while (q >= eh->elf.root.root.string && *q == *p)
6756 if (q < eh->elf.root.root.string && *p == '.')
6757 fh = (struct ppc_link_hash_entry *)
6758 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6767 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6772 get_sym_h (struct elf_link_hash_entry **hp,
6773 Elf_Internal_Sym **symp,
6775 unsigned char **tls_maskp,
6776 Elf_Internal_Sym **locsymsp,
6777 unsigned long r_symndx,
6780 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6782 if (r_symndx >= symtab_hdr->sh_info)
6784 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6785 struct elf_link_hash_entry *h;
6787 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6788 h = elf_follow_link (h);
6796 if (symsecp != NULL)
6798 asection *symsec = NULL;
6799 if (h->root.type == bfd_link_hash_defined
6800 || h->root.type == bfd_link_hash_defweak)
6801 symsec = h->root.u.def.section;
6805 if (tls_maskp != NULL)
6807 struct ppc_link_hash_entry *eh;
6809 eh = (struct ppc_link_hash_entry *) h;
6810 *tls_maskp = &eh->tls_mask;
6815 Elf_Internal_Sym *sym;
6816 Elf_Internal_Sym *locsyms = *locsymsp;
6818 if (locsyms == NULL)
6820 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6821 if (locsyms == NULL)
6822 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6823 symtab_hdr->sh_info,
6824 0, NULL, NULL, NULL);
6825 if (locsyms == NULL)
6827 *locsymsp = locsyms;
6829 sym = locsyms + r_symndx;
6837 if (symsecp != NULL)
6838 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6840 if (tls_maskp != NULL)
6842 struct got_entry **lgot_ents;
6843 unsigned char *tls_mask;
6846 lgot_ents = elf_local_got_ents (ibfd);
6847 if (lgot_ents != NULL)
6849 struct plt_entry **local_plt = (struct plt_entry **)
6850 (lgot_ents + symtab_hdr->sh_info);
6851 unsigned char *lgot_masks = (unsigned char *)
6852 (local_plt + symtab_hdr->sh_info);
6853 tls_mask = &lgot_masks[r_symndx];
6855 *tls_maskp = tls_mask;
6861 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6862 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6863 type suitable for optimization, and 1 otherwise. */
6866 get_tls_mask (unsigned char **tls_maskp,
6867 unsigned long *toc_symndx,
6868 bfd_vma *toc_addend,
6869 Elf_Internal_Sym **locsymsp,
6870 const Elf_Internal_Rela *rel,
6873 unsigned long r_symndx;
6875 struct elf_link_hash_entry *h;
6876 Elf_Internal_Sym *sym;
6880 r_symndx = ELF64_R_SYM (rel->r_info);
6881 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6884 if ((*tls_maskp != NULL && **tls_maskp != 0)
6886 || ppc64_elf_section_data (sec) == NULL
6887 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6890 /* Look inside a TOC section too. */
6893 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6894 off = h->root.u.def.value;
6897 off = sym->st_value;
6898 off += rel->r_addend;
6899 BFD_ASSERT (off % 8 == 0);
6900 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6901 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6902 if (toc_symndx != NULL)
6903 *toc_symndx = r_symndx;
6904 if (toc_addend != NULL)
6905 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6906 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6908 if ((h == NULL || is_static_defined (h))
6909 && (next_r == -1 || next_r == -2))
6914 /* Find (or create) an entry in the tocsave hash table. */
6916 static struct tocsave_entry *
6917 tocsave_find (struct ppc_link_hash_table *htab,
6918 enum insert_option insert,
6919 Elf_Internal_Sym **local_syms,
6920 const Elf_Internal_Rela *irela,
6923 unsigned long r_indx;
6924 struct elf_link_hash_entry *h;
6925 Elf_Internal_Sym *sym;
6926 struct tocsave_entry ent, *p;
6928 struct tocsave_entry **slot;
6930 r_indx = ELF64_R_SYM (irela->r_info);
6931 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6933 if (ent.sec == NULL || ent.sec->output_section == NULL)
6935 (*_bfd_error_handler)
6936 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6941 ent.offset = h->root.u.def.value;
6943 ent.offset = sym->st_value;
6944 ent.offset += irela->r_addend;
6946 hash = tocsave_htab_hash (&ent);
6947 slot = ((struct tocsave_entry **)
6948 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6954 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6963 /* Adjust all global syms defined in opd sections. In gcc generated
6964 code for the old ABI, these will already have been done. */
6967 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6969 struct ppc_link_hash_entry *eh;
6971 struct _opd_sec_data *opd;
6973 if (h->root.type == bfd_link_hash_indirect)
6976 if (h->root.type != bfd_link_hash_defined
6977 && h->root.type != bfd_link_hash_defweak)
6980 eh = (struct ppc_link_hash_entry *) h;
6981 if (eh->adjust_done)
6984 sym_sec = eh->elf.root.u.def.section;
6985 opd = get_opd_info (sym_sec);
6986 if (opd != NULL && opd->adjust != NULL)
6988 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6991 /* This entry has been deleted. */
6992 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6995 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6996 if (discarded_section (dsec))
6998 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7002 eh->elf.root.u.def.value = 0;
7003 eh->elf.root.u.def.section = dsec;
7006 eh->elf.root.u.def.value += adjust;
7007 eh->adjust_done = 1;
7012 /* Handles decrementing dynamic reloc counts for the reloc specified by
7013 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7014 have already been determined. */
7017 dec_dynrel_count (bfd_vma r_info,
7019 struct bfd_link_info *info,
7020 Elf_Internal_Sym **local_syms,
7021 struct elf_link_hash_entry *h,
7022 Elf_Internal_Sym *sym)
7024 enum elf_ppc64_reloc_type r_type;
7025 asection *sym_sec = NULL;
7027 /* Can this reloc be dynamic? This switch, and later tests here
7028 should be kept in sync with the code in check_relocs. */
7029 r_type = ELF64_R_TYPE (r_info);
7035 case R_PPC64_TPREL16:
7036 case R_PPC64_TPREL16_LO:
7037 case R_PPC64_TPREL16_HI:
7038 case R_PPC64_TPREL16_HA:
7039 case R_PPC64_TPREL16_DS:
7040 case R_PPC64_TPREL16_LO_DS:
7041 case R_PPC64_TPREL16_HIGHER:
7042 case R_PPC64_TPREL16_HIGHERA:
7043 case R_PPC64_TPREL16_HIGHEST:
7044 case R_PPC64_TPREL16_HIGHESTA:
7048 case R_PPC64_TPREL64:
7049 case R_PPC64_DTPMOD64:
7050 case R_PPC64_DTPREL64:
7051 case R_PPC64_ADDR64:
7055 case R_PPC64_ADDR14:
7056 case R_PPC64_ADDR14_BRNTAKEN:
7057 case R_PPC64_ADDR14_BRTAKEN:
7058 case R_PPC64_ADDR16:
7059 case R_PPC64_ADDR16_DS:
7060 case R_PPC64_ADDR16_HA:
7061 case R_PPC64_ADDR16_HI:
7062 case R_PPC64_ADDR16_HIGHER:
7063 case R_PPC64_ADDR16_HIGHERA:
7064 case R_PPC64_ADDR16_HIGHEST:
7065 case R_PPC64_ADDR16_HIGHESTA:
7066 case R_PPC64_ADDR16_LO:
7067 case R_PPC64_ADDR16_LO_DS:
7068 case R_PPC64_ADDR24:
7069 case R_PPC64_ADDR32:
7070 case R_PPC64_UADDR16:
7071 case R_PPC64_UADDR32:
7072 case R_PPC64_UADDR64:
7077 if (local_syms != NULL)
7079 unsigned long r_symndx;
7080 bfd *ibfd = sec->owner;
7082 r_symndx = ELF64_R_SYM (r_info);
7083 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7088 && (must_be_dyn_reloc (info, r_type)
7090 && (!SYMBOLIC_BIND (info, h)
7091 || h->root.type == bfd_link_hash_defweak
7092 || !h->def_regular))))
7093 || (ELIMINATE_COPY_RELOCS
7096 && (h->root.type == bfd_link_hash_defweak
7097 || !h->def_regular)))
7104 struct elf_dyn_relocs *p;
7105 struct elf_dyn_relocs **pp;
7106 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7108 /* elf_gc_sweep may have already removed all dyn relocs associated
7109 with local syms for a given section. Also, symbol flags are
7110 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7111 report a dynreloc miscount. */
7112 if (*pp == NULL && info->gc_sections)
7115 while ((p = *pp) != NULL)
7119 if (!must_be_dyn_reloc (info, r_type))
7131 struct ppc_dyn_relocs *p;
7132 struct ppc_dyn_relocs **pp;
7134 bfd_boolean is_ifunc;
7136 if (local_syms == NULL)
7137 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7138 if (sym_sec == NULL)
7141 vpp = &elf_section_data (sym_sec)->local_dynrel;
7142 pp = (struct ppc_dyn_relocs **) vpp;
7144 if (*pp == NULL && info->gc_sections)
7147 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7148 while ((p = *pp) != NULL)
7150 if (p->sec == sec && p->ifunc == is_ifunc)
7161 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7163 bfd_set_error (bfd_error_bad_value);
7167 /* Remove unused Official Procedure Descriptor entries. Currently we
7168 only remove those associated with functions in discarded link-once
7169 sections, or weakly defined functions that have been overridden. It
7170 would be possible to remove many more entries for statically linked
7174 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7177 bfd_boolean some_edited = FALSE;
7178 asection *need_pad = NULL;
7180 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7183 Elf_Internal_Rela *relstart, *rel, *relend;
7184 Elf_Internal_Shdr *symtab_hdr;
7185 Elf_Internal_Sym *local_syms;
7187 struct _opd_sec_data *opd;
7188 bfd_boolean need_edit, add_aux_fields;
7189 bfd_size_type cnt_16b = 0;
7191 if (!is_ppc64_elf (ibfd))
7194 sec = bfd_get_section_by_name (ibfd, ".opd");
7195 if (sec == NULL || sec->size == 0)
7198 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7201 if (sec->output_section == bfd_abs_section_ptr)
7204 /* Look through the section relocs. */
7205 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7209 symtab_hdr = &elf_symtab_hdr (ibfd);
7211 /* Read the relocations. */
7212 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7214 if (relstart == NULL)
7217 /* First run through the relocs to check they are sane, and to
7218 determine whether we need to edit this opd section. */
7222 relend = relstart + sec->reloc_count;
7223 for (rel = relstart; rel < relend; )
7225 enum elf_ppc64_reloc_type r_type;
7226 unsigned long r_symndx;
7228 struct elf_link_hash_entry *h;
7229 Elf_Internal_Sym *sym;
7231 /* .opd contains a regular array of 16 or 24 byte entries. We're
7232 only interested in the reloc pointing to a function entry
7234 if (rel->r_offset != offset
7235 || rel + 1 >= relend
7236 || (rel + 1)->r_offset != offset + 8)
7238 /* If someone messes with .opd alignment then after a
7239 "ld -r" we might have padding in the middle of .opd.
7240 Also, there's nothing to prevent someone putting
7241 something silly in .opd with the assembler. No .opd
7242 optimization for them! */
7244 (*_bfd_error_handler)
7245 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7250 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7251 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7253 (*_bfd_error_handler)
7254 (_("%B: unexpected reloc type %u in .opd section"),
7260 r_symndx = ELF64_R_SYM (rel->r_info);
7261 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7265 if (sym_sec == NULL || sym_sec->owner == NULL)
7267 const char *sym_name;
7269 sym_name = h->root.root.string;
7271 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7274 (*_bfd_error_handler)
7275 (_("%B: undefined sym `%s' in .opd section"),
7281 /* opd entries are always for functions defined in the
7282 current input bfd. If the symbol isn't defined in the
7283 input bfd, then we won't be using the function in this
7284 bfd; It must be defined in a linkonce section in another
7285 bfd, or is weak. It's also possible that we are
7286 discarding the function due to a linker script /DISCARD/,
7287 which we test for via the output_section. */
7288 if (sym_sec->owner != ibfd
7289 || sym_sec->output_section == bfd_abs_section_ptr)
7294 || (rel + 1 == relend && rel->r_offset == offset + 16))
7296 if (sec->size == offset + 24)
7301 if (rel == relend && sec->size == offset + 16)
7309 if (rel->r_offset == offset + 24)
7311 else if (rel->r_offset != offset + 16)
7313 else if (rel + 1 < relend
7314 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7315 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7320 else if (rel + 2 < relend
7321 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7322 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7331 add_aux_fields = non_overlapping && cnt_16b > 0;
7333 if (need_edit || add_aux_fields)
7335 Elf_Internal_Rela *write_rel;
7336 Elf_Internal_Shdr *rel_hdr;
7337 bfd_byte *rptr, *wptr;
7338 bfd_byte *new_contents;
7343 new_contents = NULL;
7344 amt = sec->size * sizeof (long) / 8;
7345 opd = &ppc64_elf_section_data (sec)->u.opd;
7346 opd->adjust = bfd_zalloc (sec->owner, amt);
7347 if (opd->adjust == NULL)
7349 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7351 /* This seems a waste of time as input .opd sections are all
7352 zeros as generated by gcc, but I suppose there's no reason
7353 this will always be so. We might start putting something in
7354 the third word of .opd entries. */
7355 if ((sec->flags & SEC_IN_MEMORY) == 0)
7358 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7363 if (local_syms != NULL
7364 && symtab_hdr->contents != (unsigned char *) local_syms)
7366 if (elf_section_data (sec)->relocs != relstart)
7370 sec->contents = loc;
7371 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7374 elf_section_data (sec)->relocs = relstart;
7376 new_contents = sec->contents;
7379 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7380 if (new_contents == NULL)
7384 wptr = new_contents;
7385 rptr = sec->contents;
7387 write_rel = relstart;
7391 for (rel = relstart; rel < relend; rel++)
7393 unsigned long r_symndx;
7395 struct elf_link_hash_entry *h;
7396 Elf_Internal_Sym *sym;
7398 r_symndx = ELF64_R_SYM (rel->r_info);
7399 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7403 if (rel->r_offset == offset)
7405 struct ppc_link_hash_entry *fdh = NULL;
7407 /* See if the .opd entry is full 24 byte or
7408 16 byte (with fd_aux entry overlapped with next
7411 if ((rel + 2 == relend && sec->size == offset + 16)
7412 || (rel + 3 < relend
7413 && rel[2].r_offset == offset + 16
7414 && rel[3].r_offset == offset + 24
7415 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7416 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7420 && h->root.root.string[0] == '.')
7422 struct ppc_link_hash_table *htab;
7424 htab = ppc_hash_table (info);
7426 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7429 && fdh->elf.root.type != bfd_link_hash_defined
7430 && fdh->elf.root.type != bfd_link_hash_defweak)
7434 skip = (sym_sec->owner != ibfd
7435 || sym_sec->output_section == bfd_abs_section_ptr);
7438 if (fdh != NULL && sym_sec->owner == ibfd)
7440 /* Arrange for the function descriptor sym
7442 fdh->elf.root.u.def.value = 0;
7443 fdh->elf.root.u.def.section = sym_sec;
7445 opd->adjust[rel->r_offset / 8] = -1;
7449 /* We'll be keeping this opd entry. */
7453 /* Redefine the function descriptor symbol to
7454 this location in the opd section. It is
7455 necessary to update the value here rather
7456 than using an array of adjustments as we do
7457 for local symbols, because various places
7458 in the generic ELF code use the value
7459 stored in u.def.value. */
7460 fdh->elf.root.u.def.value = wptr - new_contents;
7461 fdh->adjust_done = 1;
7464 /* Local syms are a bit tricky. We could
7465 tweak them as they can be cached, but
7466 we'd need to look through the local syms
7467 for the function descriptor sym which we
7468 don't have at the moment. So keep an
7469 array of adjustments. */
7470 opd->adjust[rel->r_offset / 8]
7471 = (wptr - new_contents) - (rptr - sec->contents);
7474 memcpy (wptr, rptr, opd_ent_size);
7475 wptr += opd_ent_size;
7476 if (add_aux_fields && opd_ent_size == 16)
7478 memset (wptr, '\0', 8);
7482 rptr += opd_ent_size;
7483 offset += opd_ent_size;
7489 && !info->relocatable
7490 && !dec_dynrel_count (rel->r_info, sec, info,
7496 /* We need to adjust any reloc offsets to point to the
7497 new opd entries. While we're at it, we may as well
7498 remove redundant relocs. */
7499 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7500 if (write_rel != rel)
7501 memcpy (write_rel, rel, sizeof (*rel));
7506 sec->size = wptr - new_contents;
7507 sec->reloc_count = write_rel - relstart;
7510 free (sec->contents);
7511 sec->contents = new_contents;
7514 /* Fudge the header size too, as this is used later in
7515 elf_bfd_final_link if we are emitting relocs. */
7516 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7517 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7520 else if (elf_section_data (sec)->relocs != relstart)
7523 if (local_syms != NULL
7524 && symtab_hdr->contents != (unsigned char *) local_syms)
7526 if (!info->keep_memory)
7529 symtab_hdr->contents = (unsigned char *) local_syms;
7534 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7536 /* If we are doing a final link and the last .opd entry is just 16 byte
7537 long, add a 8 byte padding after it. */
7538 if (need_pad != NULL && !info->relocatable)
7542 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7544 BFD_ASSERT (need_pad->size > 0);
7546 p = bfd_malloc (need_pad->size + 8);
7550 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7551 p, 0, need_pad->size))
7554 need_pad->contents = p;
7555 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7559 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7563 need_pad->contents = p;
7566 memset (need_pad->contents + need_pad->size, 0, 8);
7567 need_pad->size += 8;
7573 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7576 ppc64_elf_tls_setup (struct bfd_link_info *info,
7577 int no_tls_get_addr_opt,
7580 struct ppc_link_hash_table *htab;
7582 htab = ppc_hash_table (info);
7587 htab->do_multi_toc = 0;
7588 else if (!htab->do_multi_toc)
7591 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7592 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7593 FALSE, FALSE, TRUE));
7594 /* Move dynamic linking info to the function descriptor sym. */
7595 if (htab->tls_get_addr != NULL)
7596 func_desc_adjust (&htab->tls_get_addr->elf, info);
7597 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7598 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7599 FALSE, FALSE, TRUE));
7600 if (!no_tls_get_addr_opt)
7602 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7604 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7605 FALSE, FALSE, TRUE);
7607 func_desc_adjust (opt, info);
7608 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7609 FALSE, FALSE, TRUE);
7611 && (opt_fd->root.type == bfd_link_hash_defined
7612 || opt_fd->root.type == bfd_link_hash_defweak))
7614 /* If glibc supports an optimized __tls_get_addr call stub,
7615 signalled by the presence of __tls_get_addr_opt, and we'll
7616 be calling __tls_get_addr via a plt call stub, then
7617 make __tls_get_addr point to __tls_get_addr_opt. */
7618 tga_fd = &htab->tls_get_addr_fd->elf;
7619 if (htab->elf.dynamic_sections_created
7621 && (tga_fd->type == STT_FUNC
7622 || tga_fd->needs_plt)
7623 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7624 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7625 && tga_fd->root.type == bfd_link_hash_undefweak)))
7627 struct plt_entry *ent;
7629 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7630 if (ent->plt.refcount > 0)
7634 tga_fd->root.type = bfd_link_hash_indirect;
7635 tga_fd->root.u.i.link = &opt_fd->root;
7636 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7637 if (opt_fd->dynindx != -1)
7639 /* Use __tls_get_addr_opt in dynamic relocations. */
7640 opt_fd->dynindx = -1;
7641 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7642 opt_fd->dynstr_index);
7643 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7646 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7647 tga = &htab->tls_get_addr->elf;
7648 if (opt != NULL && tga != NULL)
7650 tga->root.type = bfd_link_hash_indirect;
7651 tga->root.u.i.link = &opt->root;
7652 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7653 _bfd_elf_link_hash_hide_symbol (info, opt,
7655 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7657 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7658 htab->tls_get_addr_fd->is_func_descriptor = 1;
7659 if (htab->tls_get_addr != NULL)
7661 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7662 htab->tls_get_addr->is_func = 1;
7668 no_tls_get_addr_opt = TRUE;
7670 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7671 return _bfd_elf_tls_setup (info->output_bfd, info);
7674 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7678 branch_reloc_hash_match (const bfd *ibfd,
7679 const Elf_Internal_Rela *rel,
7680 const struct ppc_link_hash_entry *hash1,
7681 const struct ppc_link_hash_entry *hash2)
7683 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7684 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7685 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7687 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7689 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7690 struct elf_link_hash_entry *h;
7692 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7693 h = elf_follow_link (h);
7694 if (h == &hash1->elf || h == &hash2->elf)
7700 /* Run through all the TLS relocs looking for optimization
7701 opportunities. The linker has been hacked (see ppc64elf.em) to do
7702 a preliminary section layout so that we know the TLS segment
7703 offsets. We can't optimize earlier because some optimizations need
7704 to know the tp offset, and we need to optimize before allocating
7705 dynamic relocations. */
7708 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7712 struct ppc_link_hash_table *htab;
7713 unsigned char *toc_ref;
7716 if (info->relocatable || !info->executable)
7719 htab = ppc_hash_table (info);
7723 /* Make two passes over the relocs. On the first pass, mark toc
7724 entries involved with tls relocs, and check that tls relocs
7725 involved in setting up a tls_get_addr call are indeed followed by
7726 such a call. If they are not, we can't do any tls optimization.
7727 On the second pass twiddle tls_mask flags to notify
7728 relocate_section that optimization can be done, and adjust got
7729 and plt refcounts. */
7731 for (pass = 0; pass < 2; ++pass)
7732 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7734 Elf_Internal_Sym *locsyms = NULL;
7735 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7737 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7738 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7740 Elf_Internal_Rela *relstart, *rel, *relend;
7741 bfd_boolean found_tls_get_addr_arg = 0;
7743 /* Read the relocations. */
7744 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7746 if (relstart == NULL)
7749 relend = relstart + sec->reloc_count;
7750 for (rel = relstart; rel < relend; rel++)
7752 enum elf_ppc64_reloc_type r_type;
7753 unsigned long r_symndx;
7754 struct elf_link_hash_entry *h;
7755 Elf_Internal_Sym *sym;
7757 unsigned char *tls_mask;
7758 unsigned char tls_set, tls_clear, tls_type = 0;
7760 bfd_boolean ok_tprel, is_local;
7761 long toc_ref_index = 0;
7762 int expecting_tls_get_addr = 0;
7763 bfd_boolean ret = FALSE;
7765 r_symndx = ELF64_R_SYM (rel->r_info);
7766 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7770 if (elf_section_data (sec)->relocs != relstart)
7772 if (toc_ref != NULL)
7775 && (elf_symtab_hdr (ibfd).contents
7776 != (unsigned char *) locsyms))
7783 if (h->root.type == bfd_link_hash_defined
7784 || h->root.type == bfd_link_hash_defweak)
7785 value = h->root.u.def.value;
7786 else if (h->root.type == bfd_link_hash_undefweak)
7790 found_tls_get_addr_arg = 0;
7795 /* Symbols referenced by TLS relocs must be of type
7796 STT_TLS. So no need for .opd local sym adjust. */
7797 value = sym->st_value;
7806 && h->root.type == bfd_link_hash_undefweak)
7810 value += sym_sec->output_offset;
7811 value += sym_sec->output_section->vma;
7812 value -= htab->elf.tls_sec->vma;
7813 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7814 < (bfd_vma) 1 << 32);
7818 r_type = ELF64_R_TYPE (rel->r_info);
7819 /* If this section has old-style __tls_get_addr calls
7820 without marker relocs, then check that each
7821 __tls_get_addr call reloc is preceded by a reloc
7822 that conceivably belongs to the __tls_get_addr arg
7823 setup insn. If we don't find matching arg setup
7824 relocs, don't do any tls optimization. */
7826 && sec->has_tls_get_addr_call
7828 && (h == &htab->tls_get_addr->elf
7829 || h == &htab->tls_get_addr_fd->elf)
7830 && !found_tls_get_addr_arg
7831 && is_branch_reloc (r_type))
7833 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7834 "TLS optimization disabled\n"),
7835 ibfd, sec, rel->r_offset);
7840 found_tls_get_addr_arg = 0;
7843 case R_PPC64_GOT_TLSLD16:
7844 case R_PPC64_GOT_TLSLD16_LO:
7845 expecting_tls_get_addr = 1;
7846 found_tls_get_addr_arg = 1;
7849 case R_PPC64_GOT_TLSLD16_HI:
7850 case R_PPC64_GOT_TLSLD16_HA:
7851 /* These relocs should never be against a symbol
7852 defined in a shared lib. Leave them alone if
7853 that turns out to be the case. */
7860 tls_type = TLS_TLS | TLS_LD;
7863 case R_PPC64_GOT_TLSGD16:
7864 case R_PPC64_GOT_TLSGD16_LO:
7865 expecting_tls_get_addr = 1;
7866 found_tls_get_addr_arg = 1;
7869 case R_PPC64_GOT_TLSGD16_HI:
7870 case R_PPC64_GOT_TLSGD16_HA:
7876 tls_set = TLS_TLS | TLS_TPRELGD;
7878 tls_type = TLS_TLS | TLS_GD;
7881 case R_PPC64_GOT_TPREL16_DS:
7882 case R_PPC64_GOT_TPREL16_LO_DS:
7883 case R_PPC64_GOT_TPREL16_HI:
7884 case R_PPC64_GOT_TPREL16_HA:
7889 tls_clear = TLS_TPREL;
7890 tls_type = TLS_TLS | TLS_TPREL;
7897 found_tls_get_addr_arg = 1;
7902 case R_PPC64_TOC16_LO:
7903 if (sym_sec == NULL || sym_sec != toc)
7906 /* Mark this toc entry as referenced by a TLS
7907 code sequence. We can do that now in the
7908 case of R_PPC64_TLS, and after checking for
7909 tls_get_addr for the TOC16 relocs. */
7910 if (toc_ref == NULL)
7911 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7912 if (toc_ref == NULL)
7916 value = h->root.u.def.value;
7918 value = sym->st_value;
7919 value += rel->r_addend;
7920 BFD_ASSERT (value < toc->size && value % 8 == 0);
7921 toc_ref_index = (value + toc->output_offset) / 8;
7922 if (r_type == R_PPC64_TLS
7923 || r_type == R_PPC64_TLSGD
7924 || r_type == R_PPC64_TLSLD)
7926 toc_ref[toc_ref_index] = 1;
7930 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7935 expecting_tls_get_addr = 2;
7938 case R_PPC64_TPREL64:
7942 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7947 tls_set = TLS_EXPLICIT;
7948 tls_clear = TLS_TPREL;
7953 case R_PPC64_DTPMOD64:
7957 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7959 if (rel + 1 < relend
7961 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7962 && rel[1].r_offset == rel->r_offset + 8)
7966 tls_set = TLS_EXPLICIT | TLS_GD;
7969 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7978 tls_set = TLS_EXPLICIT;
7989 if (!expecting_tls_get_addr
7990 || !sec->has_tls_get_addr_call)
7993 if (rel + 1 < relend
7994 && branch_reloc_hash_match (ibfd, rel + 1,
7996 htab->tls_get_addr_fd))
7998 if (expecting_tls_get_addr == 2)
8000 /* Check for toc tls entries. */
8001 unsigned char *toc_tls;
8004 retval = get_tls_mask (&toc_tls, NULL, NULL,
8009 if (toc_tls != NULL)
8011 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8012 found_tls_get_addr_arg = 1;
8014 toc_ref[toc_ref_index] = 1;
8020 if (expecting_tls_get_addr != 1)
8023 /* Uh oh, we didn't find the expected call. We
8024 could just mark this symbol to exclude it
8025 from tls optimization but it's safer to skip
8026 the entire optimization. */
8027 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8028 "TLS optimization disabled\n"),
8029 ibfd, sec, rel->r_offset);
8034 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8036 struct plt_entry *ent;
8037 for (ent = htab->tls_get_addr->elf.plt.plist;
8040 if (ent->addend == 0)
8042 if (ent->plt.refcount > 0)
8044 ent->plt.refcount -= 1;
8045 expecting_tls_get_addr = 0;
8051 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8053 struct plt_entry *ent;
8054 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8057 if (ent->addend == 0)
8059 if (ent->plt.refcount > 0)
8060 ent->plt.refcount -= 1;
8068 if ((tls_set & TLS_EXPLICIT) == 0)
8070 struct got_entry *ent;
8072 /* Adjust got entry for this reloc. */
8076 ent = elf_local_got_ents (ibfd)[r_symndx];
8078 for (; ent != NULL; ent = ent->next)
8079 if (ent->addend == rel->r_addend
8080 && ent->owner == ibfd
8081 && ent->tls_type == tls_type)
8088 /* We managed to get rid of a got entry. */
8089 if (ent->got.refcount > 0)
8090 ent->got.refcount -= 1;
8095 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8096 we'll lose one or two dyn relocs. */
8097 if (!dec_dynrel_count (rel->r_info, sec, info,
8101 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8103 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8109 *tls_mask |= tls_set;
8110 *tls_mask &= ~tls_clear;
8113 if (elf_section_data (sec)->relocs != relstart)
8118 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8120 if (!info->keep_memory)
8123 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8127 if (toc_ref != NULL)
8132 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8133 the values of any global symbols in a toc section that has been
8134 edited. Globals in toc sections should be a rarity, so this function
8135 sets a flag if any are found in toc sections other than the one just
8136 edited, so that futher hash table traversals can be avoided. */
8138 struct adjust_toc_info
8141 unsigned long *skip;
8142 bfd_boolean global_toc_syms;
8145 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8148 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8150 struct ppc_link_hash_entry *eh;
8151 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8154 if (h->root.type != bfd_link_hash_defined
8155 && h->root.type != bfd_link_hash_defweak)
8158 eh = (struct ppc_link_hash_entry *) h;
8159 if (eh->adjust_done)
8162 if (eh->elf.root.u.def.section == toc_inf->toc)
8164 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8165 i = toc_inf->toc->rawsize >> 3;
8167 i = eh->elf.root.u.def.value >> 3;
8169 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8171 (*_bfd_error_handler)
8172 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8175 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8176 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8179 eh->elf.root.u.def.value -= toc_inf->skip[i];
8180 eh->adjust_done = 1;
8182 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8183 toc_inf->global_toc_syms = TRUE;
8188 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8191 ok_lo_toc_insn (unsigned int insn)
8193 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8194 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8195 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8196 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8197 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8198 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8199 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8200 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8201 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8202 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8203 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8204 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8205 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8206 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8207 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8209 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8210 && ((insn & 3) == 0 || (insn & 3) == 3))
8211 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8214 /* Examine all relocs referencing .toc sections in order to remove
8215 unused .toc entries. */
8218 ppc64_elf_edit_toc (struct bfd_link_info *info)
8221 struct adjust_toc_info toc_inf;
8222 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8224 htab->do_toc_opt = 1;
8225 toc_inf.global_toc_syms = TRUE;
8226 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8228 asection *toc, *sec;
8229 Elf_Internal_Shdr *symtab_hdr;
8230 Elf_Internal_Sym *local_syms;
8231 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8232 unsigned long *skip, *drop;
8233 unsigned char *used;
8234 unsigned char *keep, last, some_unused;
8236 if (!is_ppc64_elf (ibfd))
8239 toc = bfd_get_section_by_name (ibfd, ".toc");
8242 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8243 || discarded_section (toc))
8248 symtab_hdr = &elf_symtab_hdr (ibfd);
8250 /* Look at sections dropped from the final link. */
8253 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8255 if (sec->reloc_count == 0
8256 || !discarded_section (sec)
8257 || get_opd_info (sec)
8258 || (sec->flags & SEC_ALLOC) == 0
8259 || (sec->flags & SEC_DEBUGGING) != 0)
8262 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8263 if (relstart == NULL)
8266 /* Run through the relocs to see which toc entries might be
8268 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8270 enum elf_ppc64_reloc_type r_type;
8271 unsigned long r_symndx;
8273 struct elf_link_hash_entry *h;
8274 Elf_Internal_Sym *sym;
8277 r_type = ELF64_R_TYPE (rel->r_info);
8284 case R_PPC64_TOC16_LO:
8285 case R_PPC64_TOC16_HI:
8286 case R_PPC64_TOC16_HA:
8287 case R_PPC64_TOC16_DS:
8288 case R_PPC64_TOC16_LO_DS:
8292 r_symndx = ELF64_R_SYM (rel->r_info);
8293 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8301 val = h->root.u.def.value;
8303 val = sym->st_value;
8304 val += rel->r_addend;
8306 if (val >= toc->size)
8309 /* Anything in the toc ought to be aligned to 8 bytes.
8310 If not, don't mark as unused. */
8316 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8321 skip[val >> 3] = ref_from_discarded;
8324 if (elf_section_data (sec)->relocs != relstart)
8328 /* For largetoc loads of address constants, we can convert
8329 . addis rx,2,addr@got@ha
8330 . ld ry,addr@got@l(rx)
8332 . addis rx,2,addr@toc@ha
8333 . addi ry,rx,addr@toc@l
8334 when addr is within 2G of the toc pointer. This then means
8335 that the word storing "addr" in the toc is no longer needed. */
8337 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8338 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8339 && toc->reloc_count != 0)
8341 /* Read toc relocs. */
8342 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8344 if (toc_relocs == NULL)
8347 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8349 enum elf_ppc64_reloc_type r_type;
8350 unsigned long r_symndx;
8352 struct elf_link_hash_entry *h;
8353 Elf_Internal_Sym *sym;
8356 r_type = ELF64_R_TYPE (rel->r_info);
8357 if (r_type != R_PPC64_ADDR64)
8360 r_symndx = ELF64_R_SYM (rel->r_info);
8361 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8366 || discarded_section (sym_sec))
8369 if (!SYMBOL_CALLS_LOCAL (info, h))
8374 if (h->type == STT_GNU_IFUNC)
8376 val = h->root.u.def.value;
8380 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8382 val = sym->st_value;
8384 val += rel->r_addend;
8385 val += sym_sec->output_section->vma + sym_sec->output_offset;
8387 /* We don't yet know the exact toc pointer value, but we
8388 know it will be somewhere in the toc section. Don't
8389 optimize if the difference from any possible toc
8390 pointer is outside [ff..f80008000, 7fff7fff]. */
8391 addr = toc->output_section->vma + TOC_BASE_OFF;
8392 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8395 addr = toc->output_section->vma + toc->output_section->rawsize;
8396 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8401 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8406 skip[rel->r_offset >> 3]
8407 |= can_optimize | ((rel - toc_relocs) << 2);
8414 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8418 if (local_syms != NULL
8419 && symtab_hdr->contents != (unsigned char *) local_syms)
8423 && elf_section_data (sec)->relocs != relstart)
8425 if (toc_relocs != NULL
8426 && elf_section_data (toc)->relocs != toc_relocs)
8433 /* Now check all kept sections that might reference the toc.
8434 Check the toc itself last. */
8435 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8438 sec = (sec == toc ? NULL
8439 : sec->next == NULL ? toc
8440 : sec->next == toc && toc->next ? toc->next
8445 if (sec->reloc_count == 0
8446 || discarded_section (sec)
8447 || get_opd_info (sec)
8448 || (sec->flags & SEC_ALLOC) == 0
8449 || (sec->flags & SEC_DEBUGGING) != 0)
8452 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8454 if (relstart == NULL)
8457 /* Mark toc entries referenced as used. */
8461 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8463 enum elf_ppc64_reloc_type r_type;
8464 unsigned long r_symndx;
8466 struct elf_link_hash_entry *h;
8467 Elf_Internal_Sym *sym;
8469 enum {no_check, check_lo, check_ha} insn_check;
8471 r_type = ELF64_R_TYPE (rel->r_info);
8475 insn_check = no_check;
8478 case R_PPC64_GOT_TLSLD16_HA:
8479 case R_PPC64_GOT_TLSGD16_HA:
8480 case R_PPC64_GOT_TPREL16_HA:
8481 case R_PPC64_GOT_DTPREL16_HA:
8482 case R_PPC64_GOT16_HA:
8483 case R_PPC64_TOC16_HA:
8484 insn_check = check_ha;
8487 case R_PPC64_GOT_TLSLD16_LO:
8488 case R_PPC64_GOT_TLSGD16_LO:
8489 case R_PPC64_GOT_TPREL16_LO_DS:
8490 case R_PPC64_GOT_DTPREL16_LO_DS:
8491 case R_PPC64_GOT16_LO:
8492 case R_PPC64_GOT16_LO_DS:
8493 case R_PPC64_TOC16_LO:
8494 case R_PPC64_TOC16_LO_DS:
8495 insn_check = check_lo;
8499 if (insn_check != no_check)
8501 bfd_vma off = rel->r_offset & ~3;
8502 unsigned char buf[4];
8505 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8510 insn = bfd_get_32 (ibfd, buf);
8511 if (insn_check == check_lo
8512 ? !ok_lo_toc_insn (insn)
8513 : ((insn & ((0x3f << 26) | 0x1f << 16))
8514 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8518 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8519 sprintf (str, "%#08x", insn);
8520 info->callbacks->einfo
8521 (_("%P: %H: toc optimization is not supported for"
8522 " %s instruction.\n"),
8523 ibfd, sec, rel->r_offset & ~3, str);
8530 case R_PPC64_TOC16_LO:
8531 case R_PPC64_TOC16_HI:
8532 case R_PPC64_TOC16_HA:
8533 case R_PPC64_TOC16_DS:
8534 case R_PPC64_TOC16_LO_DS:
8535 /* In case we're taking addresses of toc entries. */
8536 case R_PPC64_ADDR64:
8543 r_symndx = ELF64_R_SYM (rel->r_info);
8544 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8555 val = h->root.u.def.value;
8557 val = sym->st_value;
8558 val += rel->r_addend;
8560 if (val >= toc->size)
8563 if ((skip[val >> 3] & can_optimize) != 0)
8570 case R_PPC64_TOC16_HA:
8573 case R_PPC64_TOC16_LO_DS:
8574 off = rel->r_offset;
8575 off += (bfd_big_endian (ibfd) ? -2 : 3);
8576 if (!bfd_get_section_contents (ibfd, sec, &opc,
8582 if ((opc & (0x3f << 2)) == (58u << 2))
8587 /* Wrong sort of reloc, or not a ld. We may
8588 as well clear ref_from_discarded too. */
8595 /* For the toc section, we only mark as used if this
8596 entry itself isn't unused. */
8597 else if ((used[rel->r_offset >> 3]
8598 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8601 /* Do all the relocs again, to catch reference
8610 if (elf_section_data (sec)->relocs != relstart)
8614 /* Merge the used and skip arrays. Assume that TOC
8615 doublewords not appearing as either used or unused belong
8616 to to an entry more than one doubleword in size. */
8617 for (drop = skip, keep = used, last = 0, some_unused = 0;
8618 drop < skip + (toc->size + 7) / 8;
8623 *drop &= ~ref_from_discarded;
8624 if ((*drop & can_optimize) != 0)
8628 else if ((*drop & ref_from_discarded) != 0)
8631 last = ref_from_discarded;
8641 bfd_byte *contents, *src;
8643 Elf_Internal_Sym *sym;
8644 bfd_boolean local_toc_syms = FALSE;
8646 /* Shuffle the toc contents, and at the same time convert the
8647 skip array from booleans into offsets. */
8648 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8651 elf_section_data (toc)->this_hdr.contents = contents;
8653 for (src = contents, off = 0, drop = skip;
8654 src < contents + toc->size;
8657 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8662 memcpy (src - off, src, 8);
8666 toc->rawsize = toc->size;
8667 toc->size = src - contents - off;
8669 /* Adjust addends for relocs against the toc section sym,
8670 and optimize any accesses we can. */
8671 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8673 if (sec->reloc_count == 0
8674 || discarded_section (sec))
8677 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8679 if (relstart == NULL)
8682 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8684 enum elf_ppc64_reloc_type r_type;
8685 unsigned long r_symndx;
8687 struct elf_link_hash_entry *h;
8690 r_type = ELF64_R_TYPE (rel->r_info);
8697 case R_PPC64_TOC16_LO:
8698 case R_PPC64_TOC16_HI:
8699 case R_PPC64_TOC16_HA:
8700 case R_PPC64_TOC16_DS:
8701 case R_PPC64_TOC16_LO_DS:
8702 case R_PPC64_ADDR64:
8706 r_symndx = ELF64_R_SYM (rel->r_info);
8707 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8715 val = h->root.u.def.value;
8718 val = sym->st_value;
8720 local_toc_syms = TRUE;
8723 val += rel->r_addend;
8725 if (val > toc->rawsize)
8727 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8729 else if ((skip[val >> 3] & can_optimize) != 0)
8731 Elf_Internal_Rela *tocrel
8732 = toc_relocs + (skip[val >> 3] >> 2);
8733 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8737 case R_PPC64_TOC16_HA:
8738 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8741 case R_PPC64_TOC16_LO_DS:
8742 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8746 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8748 info->callbacks->einfo
8749 (_("%P: %H: %s references "
8750 "optimized away TOC entry\n"),
8751 ibfd, sec, rel->r_offset,
8752 ppc64_elf_howto_table[r_type]->name);
8753 bfd_set_error (bfd_error_bad_value);
8756 rel->r_addend = tocrel->r_addend;
8757 elf_section_data (sec)->relocs = relstart;
8761 if (h != NULL || sym->st_value != 0)
8764 rel->r_addend -= skip[val >> 3];
8765 elf_section_data (sec)->relocs = relstart;
8768 if (elf_section_data (sec)->relocs != relstart)
8772 /* We shouldn't have local or global symbols defined in the TOC,
8773 but handle them anyway. */
8774 if (local_syms != NULL)
8775 for (sym = local_syms;
8776 sym < local_syms + symtab_hdr->sh_info;
8778 if (sym->st_value != 0
8779 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8783 if (sym->st_value > toc->rawsize)
8784 i = toc->rawsize >> 3;
8786 i = sym->st_value >> 3;
8788 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8791 (*_bfd_error_handler)
8792 (_("%s defined on removed toc entry"),
8793 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8796 while ((skip[i] & (ref_from_discarded | can_optimize)));
8797 sym->st_value = (bfd_vma) i << 3;
8800 sym->st_value -= skip[i];
8801 symtab_hdr->contents = (unsigned char *) local_syms;
8804 /* Adjust any global syms defined in this toc input section. */
8805 if (toc_inf.global_toc_syms)
8808 toc_inf.skip = skip;
8809 toc_inf.global_toc_syms = FALSE;
8810 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8814 if (toc->reloc_count != 0)
8816 Elf_Internal_Shdr *rel_hdr;
8817 Elf_Internal_Rela *wrel;
8820 /* Remove unused toc relocs, and adjust those we keep. */
8821 if (toc_relocs == NULL)
8822 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8824 if (toc_relocs == NULL)
8828 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8829 if ((skip[rel->r_offset >> 3]
8830 & (ref_from_discarded | can_optimize)) == 0)
8832 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8833 wrel->r_info = rel->r_info;
8834 wrel->r_addend = rel->r_addend;
8837 else if (!dec_dynrel_count (rel->r_info, toc, info,
8838 &local_syms, NULL, NULL))
8841 elf_section_data (toc)->relocs = toc_relocs;
8842 toc->reloc_count = wrel - toc_relocs;
8843 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8844 sz = rel_hdr->sh_entsize;
8845 rel_hdr->sh_size = toc->reloc_count * sz;
8848 else if (toc_relocs != NULL
8849 && elf_section_data (toc)->relocs != toc_relocs)
8852 if (local_syms != NULL
8853 && symtab_hdr->contents != (unsigned char *) local_syms)
8855 if (!info->keep_memory)
8858 symtab_hdr->contents = (unsigned char *) local_syms;
8866 /* Return true iff input section I references the TOC using
8867 instructions limited to +/-32k offsets. */
8870 ppc64_elf_has_small_toc_reloc (asection *i)
8872 return (is_ppc64_elf (i->owner)
8873 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8876 /* Allocate space for one GOT entry. */
8879 allocate_got (struct elf_link_hash_entry *h,
8880 struct bfd_link_info *info,
8881 struct got_entry *gent)
8883 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8885 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8886 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8888 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8889 ? 2 : 1) * sizeof (Elf64_External_Rela);
8890 asection *got = ppc64_elf_tdata (gent->owner)->got;
8892 gent->got.offset = got->size;
8893 got->size += entsize;
8895 dyn = htab->elf.dynamic_sections_created;
8896 if (h->type == STT_GNU_IFUNC)
8898 htab->reliplt->size += rentsize;
8899 htab->got_reli_size += rentsize;
8901 else if ((info->shared
8902 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8903 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8904 || h->root.type != bfd_link_hash_undefweak))
8906 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8907 relgot->size += rentsize;
8911 /* This function merges got entries in the same toc group. */
8914 merge_got_entries (struct got_entry **pent)
8916 struct got_entry *ent, *ent2;
8918 for (ent = *pent; ent != NULL; ent = ent->next)
8919 if (!ent->is_indirect)
8920 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8921 if (!ent2->is_indirect
8922 && ent2->addend == ent->addend
8923 && ent2->tls_type == ent->tls_type
8924 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8926 ent2->is_indirect = TRUE;
8927 ent2->got.ent = ent;
8931 /* Allocate space in .plt, .got and associated reloc sections for
8935 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8937 struct bfd_link_info *info;
8938 struct ppc_link_hash_table *htab;
8940 struct ppc_link_hash_entry *eh;
8941 struct elf_dyn_relocs *p;
8942 struct got_entry **pgent, *gent;
8944 if (h->root.type == bfd_link_hash_indirect)
8947 info = (struct bfd_link_info *) inf;
8948 htab = ppc_hash_table (info);
8952 if ((htab->elf.dynamic_sections_created
8954 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8955 || h->type == STT_GNU_IFUNC)
8957 struct plt_entry *pent;
8958 bfd_boolean doneone = FALSE;
8959 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8960 if (pent->plt.refcount > 0)
8962 if (!htab->elf.dynamic_sections_created
8963 || h->dynindx == -1)
8966 pent->plt.offset = s->size;
8967 s->size += PLT_ENTRY_SIZE;
8972 /* If this is the first .plt entry, make room for the special
8976 s->size += PLT_INITIAL_ENTRY_SIZE;
8978 pent->plt.offset = s->size;
8980 /* Make room for this entry. */
8981 s->size += PLT_ENTRY_SIZE;
8983 /* Make room for the .glink code. */
8986 s->size += GLINK_CALL_STUB_SIZE;
8987 /* We need bigger stubs past index 32767. */
8988 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8992 /* We also need to make an entry in the .rela.plt section. */
8995 s->size += sizeof (Elf64_External_Rela);
8999 pent->plt.offset = (bfd_vma) -1;
9002 h->plt.plist = NULL;
9008 h->plt.plist = NULL;
9012 eh = (struct ppc_link_hash_entry *) h;
9013 /* Run through the TLS GD got entries first if we're changing them
9015 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9016 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9017 if (gent->got.refcount > 0
9018 && (gent->tls_type & TLS_GD) != 0)
9020 /* This was a GD entry that has been converted to TPREL. If
9021 there happens to be a TPREL entry we can use that one. */
9022 struct got_entry *ent;
9023 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9024 if (ent->got.refcount > 0
9025 && (ent->tls_type & TLS_TPREL) != 0
9026 && ent->addend == gent->addend
9027 && ent->owner == gent->owner)
9029 gent->got.refcount = 0;
9033 /* If not, then we'll be using our own TPREL entry. */
9034 if (gent->got.refcount != 0)
9035 gent->tls_type = TLS_TLS | TLS_TPREL;
9038 /* Remove any list entry that won't generate a word in the GOT before
9039 we call merge_got_entries. Otherwise we risk merging to empty
9041 pgent = &h->got.glist;
9042 while ((gent = *pgent) != NULL)
9043 if (gent->got.refcount > 0)
9045 if ((gent->tls_type & TLS_LD) != 0
9048 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9049 *pgent = gent->next;
9052 pgent = &gent->next;
9055 *pgent = gent->next;
9057 if (!htab->do_multi_toc)
9058 merge_got_entries (&h->got.glist);
9060 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9061 if (!gent->is_indirect)
9063 /* Make sure this symbol is output as a dynamic symbol.
9064 Undefined weak syms won't yet be marked as dynamic,
9065 nor will all TLS symbols. */
9066 if (h->dynindx == -1
9068 && h->type != STT_GNU_IFUNC
9069 && htab->elf.dynamic_sections_created)
9071 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9075 if (!is_ppc64_elf (gent->owner))
9078 allocate_got (h, info, gent);
9081 if (eh->dyn_relocs == NULL
9082 || (!htab->elf.dynamic_sections_created
9083 && h->type != STT_GNU_IFUNC))
9086 /* In the shared -Bsymbolic case, discard space allocated for
9087 dynamic pc-relative relocs against symbols which turn out to be
9088 defined in regular objects. For the normal shared case, discard
9089 space for relocs that have become local due to symbol visibility
9094 /* Relocs that use pc_count are those that appear on a call insn,
9095 or certain REL relocs (see must_be_dyn_reloc) that can be
9096 generated via assembly. We want calls to protected symbols to
9097 resolve directly to the function rather than going via the plt.
9098 If people want function pointer comparisons to work as expected
9099 then they should avoid writing weird assembly. */
9100 if (SYMBOL_CALLS_LOCAL (info, h))
9102 struct elf_dyn_relocs **pp;
9104 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9106 p->count -= p->pc_count;
9115 /* Also discard relocs on undefined weak syms with non-default
9117 if (eh->dyn_relocs != NULL
9118 && h->root.type == bfd_link_hash_undefweak)
9120 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9121 eh->dyn_relocs = NULL;
9123 /* Make sure this symbol is output as a dynamic symbol.
9124 Undefined weak syms won't yet be marked as dynamic. */
9125 else if (h->dynindx == -1
9126 && !h->forced_local)
9128 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9133 else if (h->type == STT_GNU_IFUNC)
9135 if (!h->non_got_ref)
9136 eh->dyn_relocs = NULL;
9138 else if (ELIMINATE_COPY_RELOCS)
9140 /* For the non-shared case, discard space for relocs against
9141 symbols which turn out to need copy relocs or are not
9147 /* Make sure this symbol is output as a dynamic symbol.
9148 Undefined weak syms won't yet be marked as dynamic. */
9149 if (h->dynindx == -1
9150 && !h->forced_local)
9152 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9156 /* If that succeeded, we know we'll be keeping all the
9158 if (h->dynindx != -1)
9162 eh->dyn_relocs = NULL;
9167 /* Finally, allocate space. */
9168 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9170 asection *sreloc = elf_section_data (p->sec)->sreloc;
9171 if (eh->elf.type == STT_GNU_IFUNC)
9172 sreloc = htab->reliplt;
9173 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9179 /* Find any dynamic relocs that apply to read-only sections. */
9182 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9184 struct ppc_link_hash_entry *eh;
9185 struct elf_dyn_relocs *p;
9187 eh = (struct ppc_link_hash_entry *) h;
9188 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9190 asection *s = p->sec->output_section;
9192 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9194 struct bfd_link_info *info = inf;
9196 info->flags |= DF_TEXTREL;
9198 /* Not an error, just cut short the traversal. */
9205 /* Set the sizes of the dynamic sections. */
9208 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9209 struct bfd_link_info *info)
9211 struct ppc_link_hash_table *htab;
9216 struct got_entry *first_tlsld;
9218 htab = ppc_hash_table (info);
9222 dynobj = htab->elf.dynobj;
9226 if (htab->elf.dynamic_sections_created)
9228 /* Set the contents of the .interp section to the interpreter. */
9229 if (info->executable)
9231 s = bfd_get_linker_section (dynobj, ".interp");
9234 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9235 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9239 /* Set up .got offsets for local syms, and space for local dynamic
9241 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9243 struct got_entry **lgot_ents;
9244 struct got_entry **end_lgot_ents;
9245 struct plt_entry **local_plt;
9246 struct plt_entry **end_local_plt;
9247 unsigned char *lgot_masks;
9248 bfd_size_type locsymcount;
9249 Elf_Internal_Shdr *symtab_hdr;
9251 if (!is_ppc64_elf (ibfd))
9254 for (s = ibfd->sections; s != NULL; s = s->next)
9256 struct ppc_dyn_relocs *p;
9258 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9260 if (!bfd_is_abs_section (p->sec)
9261 && bfd_is_abs_section (p->sec->output_section))
9263 /* Input section has been discarded, either because
9264 it is a copy of a linkonce section or due to
9265 linker script /DISCARD/, so we'll be discarding
9268 else if (p->count != 0)
9270 asection *srel = elf_section_data (p->sec)->sreloc;
9272 srel = htab->reliplt;
9273 srel->size += p->count * sizeof (Elf64_External_Rela);
9274 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9275 info->flags |= DF_TEXTREL;
9280 lgot_ents = elf_local_got_ents (ibfd);
9284 symtab_hdr = &elf_symtab_hdr (ibfd);
9285 locsymcount = symtab_hdr->sh_info;
9286 end_lgot_ents = lgot_ents + locsymcount;
9287 local_plt = (struct plt_entry **) end_lgot_ents;
9288 end_local_plt = local_plt + locsymcount;
9289 lgot_masks = (unsigned char *) end_local_plt;
9290 s = ppc64_elf_tdata (ibfd)->got;
9291 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9293 struct got_entry **pent, *ent;
9296 while ((ent = *pent) != NULL)
9297 if (ent->got.refcount > 0)
9299 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9301 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9306 unsigned int ent_size = 8;
9307 unsigned int rel_size = sizeof (Elf64_External_Rela);
9309 ent->got.offset = s->size;
9310 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9315 s->size += ent_size;
9316 if ((*lgot_masks & PLT_IFUNC) != 0)
9318 htab->reliplt->size += rel_size;
9319 htab->got_reli_size += rel_size;
9321 else if (info->shared)
9323 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9324 srel->size += rel_size;
9333 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9334 for (; local_plt < end_local_plt; ++local_plt)
9336 struct plt_entry *ent;
9338 for (ent = *local_plt; ent != NULL; ent = ent->next)
9339 if (ent->plt.refcount > 0)
9342 ent->plt.offset = s->size;
9343 s->size += PLT_ENTRY_SIZE;
9345 htab->reliplt->size += sizeof (Elf64_External_Rela);
9348 ent->plt.offset = (bfd_vma) -1;
9352 /* Allocate global sym .plt and .got entries, and space for global
9353 sym dynamic relocs. */
9354 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9357 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9359 struct got_entry *ent;
9361 if (!is_ppc64_elf (ibfd))
9364 ent = ppc64_tlsld_got (ibfd);
9365 if (ent->got.refcount > 0)
9367 if (!htab->do_multi_toc && first_tlsld != NULL)
9369 ent->is_indirect = TRUE;
9370 ent->got.ent = first_tlsld;
9374 if (first_tlsld == NULL)
9376 s = ppc64_elf_tdata (ibfd)->got;
9377 ent->got.offset = s->size;
9382 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9383 srel->size += sizeof (Elf64_External_Rela);
9388 ent->got.offset = (bfd_vma) -1;
9391 /* We now have determined the sizes of the various dynamic sections.
9392 Allocate memory for them. */
9394 for (s = dynobj->sections; s != NULL; s = s->next)
9396 if ((s->flags & SEC_LINKER_CREATED) == 0)
9399 if (s == htab->brlt || s == htab->relbrlt)
9400 /* These haven't been allocated yet; don't strip. */
9402 else if (s == htab->got
9406 || s == htab->dynbss)
9408 /* Strip this section if we don't need it; see the
9411 else if (s == htab->glink_eh_frame)
9413 if (!bfd_is_abs_section (s->output_section))
9414 /* Not sized yet. */
9417 else if (CONST_STRNEQ (s->name, ".rela"))
9421 if (s != htab->relplt)
9424 /* We use the reloc_count field as a counter if we need
9425 to copy relocs into the output file. */
9431 /* It's not one of our sections, so don't allocate space. */
9437 /* If we don't need this section, strip it from the
9438 output file. This is mostly to handle .rela.bss and
9439 .rela.plt. We must create both sections in
9440 create_dynamic_sections, because they must be created
9441 before the linker maps input sections to output
9442 sections. The linker does that before
9443 adjust_dynamic_symbol is called, and it is that
9444 function which decides whether anything needs to go
9445 into these sections. */
9446 s->flags |= SEC_EXCLUDE;
9450 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9453 /* Allocate memory for the section contents. We use bfd_zalloc
9454 here in case unused entries are not reclaimed before the
9455 section's contents are written out. This should not happen,
9456 but this way if it does we get a R_PPC64_NONE reloc in .rela
9457 sections instead of garbage.
9458 We also rely on the section contents being zero when writing
9460 s->contents = bfd_zalloc (dynobj, s->size);
9461 if (s->contents == NULL)
9465 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9467 if (!is_ppc64_elf (ibfd))
9470 s = ppc64_elf_tdata (ibfd)->got;
9471 if (s != NULL && s != htab->got)
9474 s->flags |= SEC_EXCLUDE;
9477 s->contents = bfd_zalloc (ibfd, s->size);
9478 if (s->contents == NULL)
9482 s = ppc64_elf_tdata (ibfd)->relgot;
9486 s->flags |= SEC_EXCLUDE;
9489 s->contents = bfd_zalloc (ibfd, s->size);
9490 if (s->contents == NULL)
9498 if (htab->elf.dynamic_sections_created)
9500 /* Add some entries to the .dynamic section. We fill in the
9501 values later, in ppc64_elf_finish_dynamic_sections, but we
9502 must add the entries now so that we get the correct size for
9503 the .dynamic section. The DT_DEBUG entry is filled in by the
9504 dynamic linker and used by the debugger. */
9505 #define add_dynamic_entry(TAG, VAL) \
9506 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9508 if (info->executable)
9510 if (!add_dynamic_entry (DT_DEBUG, 0))
9514 if (htab->plt != NULL && htab->plt->size != 0)
9516 if (!add_dynamic_entry (DT_PLTGOT, 0)
9517 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9518 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9519 || !add_dynamic_entry (DT_JMPREL, 0)
9520 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9526 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9527 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9531 if (!htab->no_tls_get_addr_opt
9532 && htab->tls_get_addr_fd != NULL
9533 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9534 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9539 if (!add_dynamic_entry (DT_RELA, 0)
9540 || !add_dynamic_entry (DT_RELASZ, 0)
9541 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9544 /* If any dynamic relocs apply to a read-only section,
9545 then we need a DT_TEXTREL entry. */
9546 if ((info->flags & DF_TEXTREL) == 0)
9547 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9549 if ((info->flags & DF_TEXTREL) != 0)
9551 if (!add_dynamic_entry (DT_TEXTREL, 0))
9556 #undef add_dynamic_entry
9561 /* Determine the type of stub needed, if any, for a call. */
9563 static inline enum ppc_stub_type
9564 ppc_type_of_stub (asection *input_sec,
9565 const Elf_Internal_Rela *rel,
9566 struct ppc_link_hash_entry **hash,
9567 struct plt_entry **plt_ent,
9568 bfd_vma destination)
9570 struct ppc_link_hash_entry *h = *hash;
9572 bfd_vma branch_offset;
9573 bfd_vma max_branch_offset;
9574 enum elf_ppc64_reloc_type r_type;
9578 struct plt_entry *ent;
9579 struct ppc_link_hash_entry *fdh = h;
9581 && h->oh->is_func_descriptor)
9583 fdh = ppc_follow_link (h->oh);
9587 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9588 if (ent->addend == rel->r_addend
9589 && ent->plt.offset != (bfd_vma) -1)
9592 return ppc_stub_plt_call;
9595 /* Here, we know we don't have a plt entry. If we don't have a
9596 either a defined function descriptor or a defined entry symbol
9597 in a regular object file, then it is pointless trying to make
9598 any other type of stub. */
9599 if (!is_static_defined (&fdh->elf)
9600 && !is_static_defined (&h->elf))
9601 return ppc_stub_none;
9603 else if (elf_local_got_ents (input_sec->owner) != NULL)
9605 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9606 struct plt_entry **local_plt = (struct plt_entry **)
9607 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9608 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9610 if (local_plt[r_symndx] != NULL)
9612 struct plt_entry *ent;
9614 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9615 if (ent->addend == rel->r_addend
9616 && ent->plt.offset != (bfd_vma) -1)
9619 return ppc_stub_plt_call;
9624 /* Determine where the call point is. */
9625 location = (input_sec->output_offset
9626 + input_sec->output_section->vma
9629 branch_offset = destination - location;
9630 r_type = ELF64_R_TYPE (rel->r_info);
9632 /* Determine if a long branch stub is needed. */
9633 max_branch_offset = 1 << 25;
9634 if (r_type != R_PPC64_REL24)
9635 max_branch_offset = 1 << 15;
9637 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9638 /* We need a stub. Figure out whether a long_branch or plt_branch
9640 return ppc_stub_long_branch;
9642 return ppc_stub_none;
9645 /* With power7 weakly ordered memory model, it is possible for ld.so
9646 to update a plt entry in one thread and have another thread see a
9647 stale zero toc entry. To avoid this we need some sort of acquire
9648 barrier in the call stub. One solution is to make the load of the
9649 toc word seem to appear to depend on the load of the function entry
9650 word. Another solution is to test for r2 being zero, and branch to
9651 the appropriate glink entry if so.
9653 . fake dep barrier compare
9654 . ld 11,xxx(2) ld 11,xxx(2)
9656 . xor 11,11,11 ld 2,xxx+8(2)
9657 . add 2,2,11 cmpldi 2,0
9658 . ld 2,xxx+8(2) bnectr+
9659 . bctr b <glink_entry>
9661 The solution involving the compare turns out to be faster, so
9662 that's what we use unless the branch won't reach. */
9664 #define ALWAYS_USE_FAKE_DEP 0
9665 #define ALWAYS_EMIT_R2SAVE 0
9667 #define PPC_LO(v) ((v) & 0xffff)
9668 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9669 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9671 static inline unsigned int
9672 plt_stub_size (struct ppc_link_hash_table *htab,
9673 struct ppc_stub_hash_entry *stub_entry,
9676 unsigned size = PLT_CALL_STUB_SIZE;
9678 if (!(ALWAYS_EMIT_R2SAVE
9679 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9681 if (!htab->plt_static_chain)
9683 if (htab->plt_thread_safe)
9685 if (PPC_HA (off) == 0)
9687 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9689 if (stub_entry->h != NULL
9690 && (stub_entry->h == htab->tls_get_addr_fd
9691 || stub_entry->h == htab->tls_get_addr)
9692 && !htab->no_tls_get_addr_opt)
9697 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9698 then return the padding needed to do so. */
9699 static inline unsigned int
9700 plt_stub_pad (struct ppc_link_hash_table *htab,
9701 struct ppc_stub_hash_entry *stub_entry,
9704 int stub_align = 1 << htab->plt_stub_align;
9705 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9706 bfd_vma stub_off = stub_entry->stub_sec->size;
9708 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9709 > (stub_size & -stub_align))
9710 return stub_align - (stub_off & (stub_align - 1));
9714 /* Build a .plt call stub. */
9716 static inline bfd_byte *
9717 build_plt_stub (struct ppc_link_hash_table *htab,
9718 struct ppc_stub_hash_entry *stub_entry,
9719 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9721 bfd *obfd = htab->stub_bfd;
9722 bfd_boolean plt_static_chain = htab->plt_static_chain;
9723 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9724 bfd_boolean use_fake_dep = plt_thread_safe;
9725 bfd_vma cmp_branch_off = 0;
9727 if (!ALWAYS_USE_FAKE_DEP
9729 && !(stub_entry->h != NULL
9730 && (stub_entry->h == htab->tls_get_addr_fd
9731 || stub_entry->h == htab->tls_get_addr)
9732 && !htab->no_tls_get_addr_opt))
9734 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9735 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9736 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9739 if (pltindex > 32768)
9740 glinkoff += (pltindex - 32768) * 4;
9742 + htab->glink->output_offset
9743 + htab->glink->output_section->vma);
9744 from = (p - stub_entry->stub_sec->contents
9745 + 4 * (ALWAYS_EMIT_R2SAVE
9746 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9747 + 4 * (PPC_HA (offset) != 0)
9748 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9750 + 4 * (plt_static_chain != 0)
9752 + stub_entry->stub_sec->output_offset
9753 + stub_entry->stub_sec->output_section->vma);
9754 cmp_branch_off = to - from;
9755 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9758 if (PPC_HA (offset) != 0)
9762 if (ALWAYS_EMIT_R2SAVE
9763 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9765 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9766 r[1].r_offset = r[0].r_offset + 4;
9767 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9768 r[1].r_addend = r[0].r_addend;
9769 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9771 r[2].r_offset = r[1].r_offset + 4;
9772 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9773 r[2].r_addend = r[0].r_addend;
9777 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9778 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9779 r[2].r_addend = r[0].r_addend + 8;
9780 if (plt_static_chain)
9782 r[3].r_offset = r[2].r_offset + 4;
9783 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9784 r[3].r_addend = r[0].r_addend + 16;
9788 if (ALWAYS_EMIT_R2SAVE
9789 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9790 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9791 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9792 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9793 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9795 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9798 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9801 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9802 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9804 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9805 if (plt_static_chain)
9806 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9812 if (ALWAYS_EMIT_R2SAVE
9813 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9815 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9816 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9818 r[1].r_offset = r[0].r_offset + 4;
9819 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9820 r[1].r_addend = r[0].r_addend;
9824 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9825 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9826 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9827 if (plt_static_chain)
9829 r[2].r_offset = r[1].r_offset + 4;
9830 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9831 r[2].r_addend = r[0].r_addend + 8;
9835 if (ALWAYS_EMIT_R2SAVE
9836 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9837 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9838 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9839 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9841 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9844 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9847 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9848 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9850 if (plt_static_chain)
9851 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9852 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9854 if (plt_thread_safe && !use_fake_dep)
9856 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9857 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9858 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
9861 bfd_put_32 (obfd, BCTR, p), p += 4;
9865 /* Build a special .plt call stub for __tls_get_addr. */
9867 #define LD_R11_0R3 0xe9630000
9868 #define LD_R12_0R3 0xe9830000
9869 #define MR_R0_R3 0x7c601b78
9870 #define CMPDI_R11_0 0x2c2b0000
9871 #define ADD_R3_R12_R13 0x7c6c6a14
9872 #define BEQLR 0x4d820020
9873 #define MR_R3_R0 0x7c030378
9874 #define MFLR_R11 0x7d6802a6
9875 #define STD_R11_0R1 0xf9610000
9876 #define BCTRL 0x4e800421
9877 #define LD_R11_0R1 0xe9610000
9878 #define LD_R2_0R1 0xe8410000
9879 #define MTLR_R11 0x7d6803a6
9881 static inline bfd_byte *
9882 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
9883 struct ppc_stub_hash_entry *stub_entry,
9884 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9886 bfd *obfd = htab->stub_bfd;
9888 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9889 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9890 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9891 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9892 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9893 bfd_put_32 (obfd, BEQLR, p), p += 4;
9894 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9895 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9896 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9899 r[0].r_offset += 9 * 4;
9900 p = build_plt_stub (htab, stub_entry, p, offset, r);
9901 bfd_put_32 (obfd, BCTRL, p - 4);
9903 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9904 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9905 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9906 bfd_put_32 (obfd, BLR, p), p += 4;
9911 static Elf_Internal_Rela *
9912 get_relocs (asection *sec, int count)
9914 Elf_Internal_Rela *relocs;
9915 struct bfd_elf_section_data *elfsec_data;
9917 elfsec_data = elf_section_data (sec);
9918 relocs = elfsec_data->relocs;
9921 bfd_size_type relsize;
9922 relsize = sec->reloc_count * sizeof (*relocs);
9923 relocs = bfd_alloc (sec->owner, relsize);
9926 elfsec_data->relocs = relocs;
9927 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9928 sizeof (Elf_Internal_Shdr));
9929 if (elfsec_data->rela.hdr == NULL)
9931 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9932 * sizeof (Elf64_External_Rela));
9933 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9934 sec->reloc_count = 0;
9936 relocs += sec->reloc_count;
9937 sec->reloc_count += count;
9942 get_r2off (struct bfd_link_info *info,
9943 struct ppc_stub_hash_entry *stub_entry)
9945 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9946 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9950 /* Support linking -R objects. Get the toc pointer from the
9953 asection *opd = stub_entry->h->elf.root.u.def.section;
9954 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9956 if (strcmp (opd->name, ".opd") != 0
9957 || opd->reloc_count != 0)
9959 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
9960 stub_entry->h->elf.root.root.string);
9961 bfd_set_error (bfd_error_bad_value);
9964 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9966 r2off = bfd_get_64 (opd->owner, buf);
9967 r2off -= elf_gp (info->output_bfd);
9969 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9974 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9976 struct ppc_stub_hash_entry *stub_entry;
9977 struct ppc_branch_hash_entry *br_entry;
9978 struct bfd_link_info *info;
9979 struct ppc_link_hash_table *htab;
9984 Elf_Internal_Rela *r;
9987 /* Massage our args to the form they really have. */
9988 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9991 htab = ppc_hash_table (info);
9995 /* Make a note of the offset within the stubs for this entry. */
9996 stub_entry->stub_offset = stub_entry->stub_sec->size;
9997 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9999 htab->stub_count[stub_entry->stub_type - 1] += 1;
10000 switch (stub_entry->stub_type)
10002 case ppc_stub_long_branch:
10003 case ppc_stub_long_branch_r2off:
10004 /* Branches are relative. This is where we are going to. */
10005 off = dest = (stub_entry->target_value
10006 + stub_entry->target_section->output_offset
10007 + stub_entry->target_section->output_section->vma);
10009 /* And this is where we are coming from. */
10010 off -= (stub_entry->stub_offset
10011 + stub_entry->stub_sec->output_offset
10012 + stub_entry->stub_sec->output_section->vma);
10015 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10017 bfd_vma r2off = get_r2off (info, stub_entry);
10021 htab->stub_error = TRUE;
10024 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10027 if (PPC_HA (r2off) != 0)
10030 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10033 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10037 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10039 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10041 info->callbacks->einfo
10042 (_("%P: long branch stub `%s' offset overflow\n"),
10043 stub_entry->root.string);
10044 htab->stub_error = TRUE;
10048 if (info->emitrelocations)
10050 r = get_relocs (stub_entry->stub_sec, 1);
10053 r->r_offset = loc - stub_entry->stub_sec->contents;
10054 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10055 r->r_addend = dest;
10056 if (stub_entry->h != NULL)
10058 struct elf_link_hash_entry **hashes;
10059 unsigned long symndx;
10060 struct ppc_link_hash_entry *h;
10062 hashes = elf_sym_hashes (htab->stub_bfd);
10063 if (hashes == NULL)
10065 bfd_size_type hsize;
10067 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10068 hashes = bfd_zalloc (htab->stub_bfd, hsize);
10069 if (hashes == NULL)
10071 elf_sym_hashes (htab->stub_bfd) = hashes;
10072 htab->stub_globals = 1;
10074 symndx = htab->stub_globals++;
10076 hashes[symndx] = &h->elf;
10077 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10078 if (h->oh != NULL && h->oh->is_func)
10079 h = ppc_follow_link (h->oh);
10080 if (h->elf.root.u.def.section != stub_entry->target_section)
10081 /* H is an opd symbol. The addend must be zero. */
10085 off = (h->elf.root.u.def.value
10086 + h->elf.root.u.def.section->output_offset
10087 + h->elf.root.u.def.section->output_section->vma);
10088 r->r_addend -= off;
10094 case ppc_stub_plt_branch:
10095 case ppc_stub_plt_branch_r2off:
10096 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10097 stub_entry->root.string + 9,
10099 if (br_entry == NULL)
10101 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10102 stub_entry->root.string);
10103 htab->stub_error = TRUE;
10107 dest = (stub_entry->target_value
10108 + stub_entry->target_section->output_offset
10109 + stub_entry->target_section->output_section->vma);
10111 bfd_put_64 (htab->brlt->owner, dest,
10112 htab->brlt->contents + br_entry->offset);
10114 if (br_entry->iter == htab->stub_iteration)
10116 br_entry->iter = 0;
10118 if (htab->relbrlt != NULL)
10120 /* Create a reloc for the branch lookup table entry. */
10121 Elf_Internal_Rela rela;
10124 rela.r_offset = (br_entry->offset
10125 + htab->brlt->output_offset
10126 + htab->brlt->output_section->vma);
10127 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10128 rela.r_addend = dest;
10130 rl = htab->relbrlt->contents;
10131 rl += (htab->relbrlt->reloc_count++
10132 * sizeof (Elf64_External_Rela));
10133 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10135 else if (info->emitrelocations)
10137 r = get_relocs (htab->brlt, 1);
10140 /* brlt, being SEC_LINKER_CREATED does not go through the
10141 normal reloc processing. Symbols and offsets are not
10142 translated from input file to output file form, so
10143 set up the offset per the output file. */
10144 r->r_offset = (br_entry->offset
10145 + htab->brlt->output_offset
10146 + htab->brlt->output_section->vma);
10147 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10148 r->r_addend = dest;
10152 dest = (br_entry->offset
10153 + htab->brlt->output_offset
10154 + htab->brlt->output_section->vma);
10157 - elf_gp (htab->brlt->output_section->owner)
10158 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10160 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10162 info->callbacks->einfo
10163 (_("%P: linkage table error against `%T'\n"),
10164 stub_entry->root.string);
10165 bfd_set_error (bfd_error_bad_value);
10166 htab->stub_error = TRUE;
10170 if (info->emitrelocations)
10172 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10175 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10176 if (bfd_big_endian (info->output_bfd))
10177 r[0].r_offset += 2;
10178 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10179 r[0].r_offset += 4;
10180 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10181 r[0].r_addend = dest;
10182 if (PPC_HA (off) != 0)
10184 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10185 r[1].r_offset = r[0].r_offset + 4;
10186 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10187 r[1].r_addend = r[0].r_addend;
10191 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10193 if (PPC_HA (off) != 0)
10196 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10198 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10203 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10208 bfd_vma r2off = get_r2off (info, stub_entry);
10212 htab->stub_error = TRUE;
10216 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10219 if (PPC_HA (off) != 0)
10222 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10224 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10229 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10233 if (PPC_HA (r2off) != 0)
10236 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10239 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10242 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10244 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10247 case ppc_stub_plt_call:
10248 case ppc_stub_plt_call_r2save:
10249 if (stub_entry->h != NULL
10250 && stub_entry->h->is_func_descriptor
10251 && stub_entry->h->oh != NULL)
10253 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10255 /* If the old-ABI "dot-symbol" is undefined make it weak so
10256 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10257 FIXME: We used to define the symbol on one of the call
10258 stubs instead, which is why we test symbol section id
10259 against htab->top_id in various places. Likely all
10260 these checks could now disappear. */
10261 if (fh->elf.root.type == bfd_link_hash_undefined)
10262 fh->elf.root.type = bfd_link_hash_undefweak;
10263 /* Stop undo_symbol_twiddle changing it back to undefined. */
10264 fh->was_undefined = 0;
10267 /* Now build the stub. */
10268 dest = stub_entry->plt_ent->plt.offset & ~1;
10269 if (dest >= (bfd_vma) -2)
10273 if (!htab->elf.dynamic_sections_created
10274 || stub_entry->h == NULL
10275 || stub_entry->h->elf.dynindx == -1)
10278 dest += plt->output_offset + plt->output_section->vma;
10280 if (stub_entry->h == NULL
10281 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10283 Elf_Internal_Rela rela;
10286 rela.r_offset = dest;
10287 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10288 rela.r_addend = (stub_entry->target_value
10289 + stub_entry->target_section->output_offset
10290 + stub_entry->target_section->output_section->vma);
10292 rl = (htab->reliplt->contents
10293 + (htab->reliplt->reloc_count++
10294 * sizeof (Elf64_External_Rela)));
10295 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10296 stub_entry->plt_ent->plt.offset |= 1;
10300 - elf_gp (plt->output_section->owner)
10301 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10303 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10305 info->callbacks->einfo
10306 (_("%P: linkage table error against `%T'\n"),
10307 stub_entry->h != NULL
10308 ? stub_entry->h->elf.root.root.string
10310 bfd_set_error (bfd_error_bad_value);
10311 htab->stub_error = TRUE;
10315 if (htab->plt_stub_align != 0)
10317 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10319 stub_entry->stub_sec->size += pad;
10320 stub_entry->stub_offset = stub_entry->stub_sec->size;
10325 if (info->emitrelocations)
10327 r = get_relocs (stub_entry->stub_sec,
10329 + (PPC_HA (off) != 0)
10330 + (htab->plt_static_chain
10331 && PPC_HA (off + 16) == PPC_HA (off))));
10334 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10335 if (bfd_big_endian (info->output_bfd))
10336 r[0].r_offset += 2;
10337 r[0].r_addend = dest;
10339 if (stub_entry->h != NULL
10340 && (stub_entry->h == htab->tls_get_addr_fd
10341 || stub_entry->h == htab->tls_get_addr)
10342 && !htab->no_tls_get_addr_opt)
10343 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10345 p = build_plt_stub (htab, stub_entry, loc, off, r);
10354 stub_entry->stub_sec->size += size;
10356 if (htab->emit_stub_syms)
10358 struct elf_link_hash_entry *h;
10361 const char *const stub_str[] = { "long_branch",
10362 "long_branch_r2off",
10364 "plt_branch_r2off",
10368 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10369 len2 = strlen (stub_entry->root.string);
10370 name = bfd_malloc (len1 + len2 + 2);
10373 memcpy (name, stub_entry->root.string, 9);
10374 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10375 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10376 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10379 if (h->root.type == bfd_link_hash_new)
10381 h->root.type = bfd_link_hash_defined;
10382 h->root.u.def.section = stub_entry->stub_sec;
10383 h->root.u.def.value = stub_entry->stub_offset;
10384 h->ref_regular = 1;
10385 h->def_regular = 1;
10386 h->ref_regular_nonweak = 1;
10387 h->forced_local = 1;
10395 /* As above, but don't actually build the stub. Just bump offset so
10396 we know stub section sizes, and select plt_branch stubs where
10397 long_branch stubs won't do. */
10400 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10402 struct ppc_stub_hash_entry *stub_entry;
10403 struct bfd_link_info *info;
10404 struct ppc_link_hash_table *htab;
10408 /* Massage our args to the form they really have. */
10409 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10412 htab = ppc_hash_table (info);
10416 if (stub_entry->stub_type == ppc_stub_plt_call
10417 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10420 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10421 if (off >= (bfd_vma) -2)
10424 if (!htab->elf.dynamic_sections_created
10425 || stub_entry->h == NULL
10426 || stub_entry->h->elf.dynindx == -1)
10428 off += (plt->output_offset
10429 + plt->output_section->vma
10430 - elf_gp (plt->output_section->owner)
10431 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10433 size = plt_stub_size (htab, stub_entry, off);
10434 if (htab->plt_stub_align)
10435 size += plt_stub_pad (htab, stub_entry, off);
10436 if (info->emitrelocations)
10438 stub_entry->stub_sec->reloc_count
10440 + (PPC_HA (off) != 0)
10441 + (htab->plt_static_chain
10442 && PPC_HA (off + 16) == PPC_HA (off)));
10443 stub_entry->stub_sec->flags |= SEC_RELOC;
10448 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10452 off = (stub_entry->target_value
10453 + stub_entry->target_section->output_offset
10454 + stub_entry->target_section->output_section->vma);
10455 off -= (stub_entry->stub_sec->size
10456 + stub_entry->stub_sec->output_offset
10457 + stub_entry->stub_sec->output_section->vma);
10459 /* Reset the stub type from the plt variant in case we now
10460 can reach with a shorter stub. */
10461 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10462 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10465 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10467 r2off = get_r2off (info, stub_entry);
10470 htab->stub_error = TRUE;
10474 if (PPC_HA (r2off) != 0)
10479 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10480 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10482 struct ppc_branch_hash_entry *br_entry;
10484 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10485 stub_entry->root.string + 9,
10487 if (br_entry == NULL)
10489 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10490 stub_entry->root.string);
10491 htab->stub_error = TRUE;
10495 if (br_entry->iter != htab->stub_iteration)
10497 br_entry->iter = htab->stub_iteration;
10498 br_entry->offset = htab->brlt->size;
10499 htab->brlt->size += 8;
10501 if (htab->relbrlt != NULL)
10502 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10503 else if (info->emitrelocations)
10505 htab->brlt->reloc_count += 1;
10506 htab->brlt->flags |= SEC_RELOC;
10510 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10511 off = (br_entry->offset
10512 + htab->brlt->output_offset
10513 + htab->brlt->output_section->vma
10514 - elf_gp (htab->brlt->output_section->owner)
10515 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10517 if (info->emitrelocations)
10519 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10520 stub_entry->stub_sec->flags |= SEC_RELOC;
10523 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10526 if (PPC_HA (off) != 0)
10532 if (PPC_HA (off) != 0)
10535 if (PPC_HA (r2off) != 0)
10539 else if (info->emitrelocations)
10541 stub_entry->stub_sec->reloc_count += 1;
10542 stub_entry->stub_sec->flags |= SEC_RELOC;
10546 stub_entry->stub_sec->size += size;
10550 /* Set up various things so that we can make a list of input sections
10551 for each output section included in the link. Returns -1 on error,
10552 0 when no stubs will be needed, and 1 on success. */
10555 ppc64_elf_setup_section_lists
10556 (struct bfd_link_info *info,
10557 asection *(*add_stub_section) (const char *, asection *),
10558 void (*layout_sections_again) (void))
10561 int top_id, top_index, id;
10563 asection **input_list;
10565 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10569 /* Stash our params away. */
10570 htab->add_stub_section = add_stub_section;
10571 htab->layout_sections_again = layout_sections_again;
10573 /* Find the top input section id. */
10574 for (input_bfd = info->input_bfds, top_id = 3;
10576 input_bfd = input_bfd->link_next)
10578 for (section = input_bfd->sections;
10580 section = section->next)
10582 if (top_id < section->id)
10583 top_id = section->id;
10587 htab->top_id = top_id;
10588 amt = sizeof (struct map_stub) * (top_id + 1);
10589 htab->stub_group = bfd_zmalloc (amt);
10590 if (htab->stub_group == NULL)
10593 /* Set toc_off for com, und, abs and ind sections. */
10594 for (id = 0; id < 3; id++)
10595 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10597 /* We can't use output_bfd->section_count here to find the top output
10598 section index as some sections may have been removed, and
10599 strip_excluded_output_sections doesn't renumber the indices. */
10600 for (section = info->output_bfd->sections, top_index = 0;
10602 section = section->next)
10604 if (top_index < section->index)
10605 top_index = section->index;
10608 htab->top_index = top_index;
10609 amt = sizeof (asection *) * (top_index + 1);
10610 input_list = bfd_zmalloc (amt);
10611 htab->input_list = input_list;
10612 if (input_list == NULL)
10618 /* Set up for first pass at multitoc partitioning. */
10621 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10623 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10625 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
10626 htab->toc_bfd = NULL;
10627 htab->toc_first_sec = NULL;
10630 /* The linker repeatedly calls this function for each TOC input section
10631 and linker generated GOT section. Group input bfds such that the toc
10632 within a group is less than 64k in size. */
10635 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10637 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10638 bfd_vma addr, off, limit;
10643 if (!htab->second_toc_pass)
10645 /* Keep track of the first .toc or .got section for this input bfd. */
10646 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
10650 htab->toc_bfd = isec->owner;
10651 htab->toc_first_sec = isec;
10654 addr = isec->output_offset + isec->output_section->vma;
10655 off = addr - htab->toc_curr;
10656 limit = 0x80008000;
10657 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10659 if (off + isec->size > limit)
10661 addr = (htab->toc_first_sec->output_offset
10662 + htab->toc_first_sec->output_section->vma);
10663 htab->toc_curr = addr;
10666 /* toc_curr is the base address of this toc group. Set elf_gp
10667 for the input section to be the offset relative to the
10668 output toc base plus 0x8000. Making the input elf_gp an
10669 offset allows us to move the toc as a whole without
10670 recalculating input elf_gp. */
10671 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10672 off += TOC_BASE_OFF;
10674 /* Die if someone uses a linker script that doesn't keep input
10675 file .toc and .got together. */
10677 && elf_gp (isec->owner) != 0
10678 && elf_gp (isec->owner) != off)
10681 elf_gp (isec->owner) = off;
10685 /* During the second pass toc_first_sec points to the start of
10686 a toc group, and toc_curr is used to track the old elf_gp.
10687 We use toc_bfd to ensure we only look at each bfd once. */
10688 if (htab->toc_bfd == isec->owner)
10690 htab->toc_bfd = isec->owner;
10692 if (htab->toc_first_sec == NULL
10693 || htab->toc_curr != elf_gp (isec->owner))
10695 htab->toc_curr = elf_gp (isec->owner);
10696 htab->toc_first_sec = isec;
10698 addr = (htab->toc_first_sec->output_offset
10699 + htab->toc_first_sec->output_section->vma);
10700 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10701 elf_gp (isec->owner) = off;
10706 /* Called via elf_link_hash_traverse to merge GOT entries for global
10710 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10712 if (h->root.type == bfd_link_hash_indirect)
10715 merge_got_entries (&h->got.glist);
10720 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10724 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10726 struct got_entry *gent;
10728 if (h->root.type == bfd_link_hash_indirect)
10731 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10732 if (!gent->is_indirect)
10733 allocate_got (h, (struct bfd_link_info *) inf, gent);
10737 /* Called on the first multitoc pass after the last call to
10738 ppc64_elf_next_toc_section. This function removes duplicate GOT
10742 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10744 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10745 struct bfd *ibfd, *ibfd2;
10746 bfd_boolean done_something;
10748 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10750 if (!htab->do_multi_toc)
10753 /* Merge global sym got entries within a toc group. */
10754 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10756 /* And tlsld_got. */
10757 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10759 struct got_entry *ent, *ent2;
10761 if (!is_ppc64_elf (ibfd))
10764 ent = ppc64_tlsld_got (ibfd);
10765 if (!ent->is_indirect
10766 && ent->got.offset != (bfd_vma) -1)
10768 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10770 if (!is_ppc64_elf (ibfd2))
10773 ent2 = ppc64_tlsld_got (ibfd2);
10774 if (!ent2->is_indirect
10775 && ent2->got.offset != (bfd_vma) -1
10776 && elf_gp (ibfd2) == elf_gp (ibfd))
10778 ent2->is_indirect = TRUE;
10779 ent2->got.ent = ent;
10785 /* Zap sizes of got sections. */
10786 htab->reliplt->rawsize = htab->reliplt->size;
10787 htab->reliplt->size -= htab->got_reli_size;
10788 htab->got_reli_size = 0;
10790 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10792 asection *got, *relgot;
10794 if (!is_ppc64_elf (ibfd))
10797 got = ppc64_elf_tdata (ibfd)->got;
10800 got->rawsize = got->size;
10802 relgot = ppc64_elf_tdata (ibfd)->relgot;
10803 relgot->rawsize = relgot->size;
10808 /* Now reallocate the got, local syms first. We don't need to
10809 allocate section contents again since we never increase size. */
10810 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10812 struct got_entry **lgot_ents;
10813 struct got_entry **end_lgot_ents;
10814 struct plt_entry **local_plt;
10815 struct plt_entry **end_local_plt;
10816 unsigned char *lgot_masks;
10817 bfd_size_type locsymcount;
10818 Elf_Internal_Shdr *symtab_hdr;
10821 if (!is_ppc64_elf (ibfd))
10824 lgot_ents = elf_local_got_ents (ibfd);
10828 symtab_hdr = &elf_symtab_hdr (ibfd);
10829 locsymcount = symtab_hdr->sh_info;
10830 end_lgot_ents = lgot_ents + locsymcount;
10831 local_plt = (struct plt_entry **) end_lgot_ents;
10832 end_local_plt = local_plt + locsymcount;
10833 lgot_masks = (unsigned char *) end_local_plt;
10834 s = ppc64_elf_tdata (ibfd)->got;
10835 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10837 struct got_entry *ent;
10839 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10841 unsigned int ent_size = 8;
10842 unsigned int rel_size = sizeof (Elf64_External_Rela);
10844 ent->got.offset = s->size;
10845 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10850 s->size += ent_size;
10851 if ((*lgot_masks & PLT_IFUNC) != 0)
10853 htab->reliplt->size += rel_size;
10854 htab->got_reli_size += rel_size;
10856 else if (info->shared)
10858 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10859 srel->size += rel_size;
10865 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10867 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10869 struct got_entry *ent;
10871 if (!is_ppc64_elf (ibfd))
10874 ent = ppc64_tlsld_got (ibfd);
10875 if (!ent->is_indirect
10876 && ent->got.offset != (bfd_vma) -1)
10878 asection *s = ppc64_elf_tdata (ibfd)->got;
10879 ent->got.offset = s->size;
10883 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10884 srel->size += sizeof (Elf64_External_Rela);
10889 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10890 if (!done_something)
10891 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10895 if (!is_ppc64_elf (ibfd))
10898 got = ppc64_elf_tdata (ibfd)->got;
10901 done_something = got->rawsize != got->size;
10902 if (done_something)
10907 if (done_something)
10908 (*htab->layout_sections_again) ();
10910 /* Set up for second pass over toc sections to recalculate elf_gp
10911 on input sections. */
10912 htab->toc_bfd = NULL;
10913 htab->toc_first_sec = NULL;
10914 htab->second_toc_pass = TRUE;
10915 return done_something;
10918 /* Called after second pass of multitoc partitioning. */
10921 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10923 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10925 /* After the second pass, toc_curr tracks the TOC offset used
10926 for code sections below in ppc64_elf_next_input_section. */
10927 htab->toc_curr = TOC_BASE_OFF;
10930 /* No toc references were found in ISEC. If the code in ISEC makes no
10931 calls, then there's no need to use toc adjusting stubs when branching
10932 into ISEC. Actually, indirect calls from ISEC are OK as they will
10933 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10934 needed, and 2 if a cyclical call-graph was found but no other reason
10935 for a stub was detected. If called from the top level, a return of
10936 2 means the same as a return of 0. */
10939 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10943 /* Mark this section as checked. */
10944 isec->call_check_done = 1;
10946 /* We know none of our code bearing sections will need toc stubs. */
10947 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10950 if (isec->size == 0)
10953 if (isec->output_section == NULL)
10957 if (isec->reloc_count != 0)
10959 Elf_Internal_Rela *relstart, *rel;
10960 Elf_Internal_Sym *local_syms;
10961 struct ppc_link_hash_table *htab;
10963 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10964 info->keep_memory);
10965 if (relstart == NULL)
10968 /* Look for branches to outside of this section. */
10970 htab = ppc_hash_table (info);
10974 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10976 enum elf_ppc64_reloc_type r_type;
10977 unsigned long r_symndx;
10978 struct elf_link_hash_entry *h;
10979 struct ppc_link_hash_entry *eh;
10980 Elf_Internal_Sym *sym;
10982 struct _opd_sec_data *opd;
10986 r_type = ELF64_R_TYPE (rel->r_info);
10987 if (r_type != R_PPC64_REL24
10988 && r_type != R_PPC64_REL14
10989 && r_type != R_PPC64_REL14_BRTAKEN
10990 && r_type != R_PPC64_REL14_BRNTAKEN)
10993 r_symndx = ELF64_R_SYM (rel->r_info);
10994 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11001 /* Calls to dynamic lib functions go through a plt call stub
11003 eh = (struct ppc_link_hash_entry *) h;
11005 && (eh->elf.plt.plist != NULL
11007 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11013 if (sym_sec == NULL)
11014 /* Ignore other undefined symbols. */
11017 /* Assume branches to other sections not included in the
11018 link need stubs too, to cover -R and absolute syms. */
11019 if (sym_sec->output_section == NULL)
11026 sym_value = sym->st_value;
11029 if (h->root.type != bfd_link_hash_defined
11030 && h->root.type != bfd_link_hash_defweak)
11032 sym_value = h->root.u.def.value;
11034 sym_value += rel->r_addend;
11036 /* If this branch reloc uses an opd sym, find the code section. */
11037 opd = get_opd_info (sym_sec);
11040 if (h == NULL && opd->adjust != NULL)
11044 adjust = opd->adjust[sym->st_value / 8];
11046 /* Assume deleted functions won't ever be called. */
11048 sym_value += adjust;
11051 dest = opd_entry_value (sym_sec, sym_value,
11052 &sym_sec, NULL, FALSE);
11053 if (dest == (bfd_vma) -1)
11058 + sym_sec->output_offset
11059 + sym_sec->output_section->vma);
11061 /* Ignore branch to self. */
11062 if (sym_sec == isec)
11065 /* If the called function uses the toc, we need a stub. */
11066 if (sym_sec->has_toc_reloc
11067 || sym_sec->makes_toc_func_call)
11073 /* Assume any branch that needs a long branch stub might in fact
11074 need a plt_branch stub. A plt_branch stub uses r2. */
11075 else if (dest - (isec->output_offset
11076 + isec->output_section->vma
11077 + rel->r_offset) + (1 << 25) >= (2 << 25))
11083 /* If calling back to a section in the process of being
11084 tested, we can't say for sure that no toc adjusting stubs
11085 are needed, so don't return zero. */
11086 else if (sym_sec->call_check_in_progress)
11089 /* Branches to another section that itself doesn't have any TOC
11090 references are OK. Recursively call ourselves to check. */
11091 else if (!sym_sec->call_check_done)
11095 /* Mark current section as indeterminate, so that other
11096 sections that call back to current won't be marked as
11098 isec->call_check_in_progress = 1;
11099 recur = toc_adjusting_stub_needed (info, sym_sec);
11100 isec->call_check_in_progress = 0;
11111 if (local_syms != NULL
11112 && (elf_symtab_hdr (isec->owner).contents
11113 != (unsigned char *) local_syms))
11115 if (elf_section_data (isec)->relocs != relstart)
11120 && isec->map_head.s != NULL
11121 && (strcmp (isec->output_section->name, ".init") == 0
11122 || strcmp (isec->output_section->name, ".fini") == 0))
11124 if (isec->map_head.s->has_toc_reloc
11125 || isec->map_head.s->makes_toc_func_call)
11127 else if (!isec->map_head.s->call_check_done)
11130 isec->call_check_in_progress = 1;
11131 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11132 isec->call_check_in_progress = 0;
11139 isec->makes_toc_func_call = 1;
11144 /* The linker repeatedly calls this function for each input section,
11145 in the order that input sections are linked into output sections.
11146 Build lists of input sections to determine groupings between which
11147 we may insert linker stubs. */
11150 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11152 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11157 if ((isec->output_section->flags & SEC_CODE) != 0
11158 && isec->output_section->index <= htab->top_index)
11160 asection **list = htab->input_list + isec->output_section->index;
11161 /* Steal the link_sec pointer for our list. */
11162 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11163 /* This happens to make the list in reverse order,
11164 which is what we want. */
11165 PREV_SEC (isec) = *list;
11169 if (htab->multi_toc_needed)
11171 /* If a code section has a function that uses the TOC then we need
11172 to use the right TOC (obviously). Also, make sure that .opd gets
11173 the correct TOC value for R_PPC64_TOC relocs that don't have or
11174 can't find their function symbol (shouldn't ever happen now).
11175 Also specially treat .fixup for the linux kernel. .fixup
11176 contains branches, but only back to the function that hit an
11178 if (isec->has_toc_reloc
11179 || (isec->flags & SEC_CODE) == 0
11180 || strcmp (isec->name, ".fixup") == 0)
11182 if (elf_gp (isec->owner) != 0)
11183 htab->toc_curr = elf_gp (isec->owner);
11187 if (!isec->call_check_done
11188 && toc_adjusting_stub_needed (info, isec) < 0)
11190 /* If we make a local call from this section, ie. a branch
11191 without a following nop, then we have no place to put a
11192 toc restoring insn. We must use the same toc group as
11194 Testing makes_toc_func_call actually tests for *any*
11195 calls to functions that need a good toc pointer. A more
11196 precise test would be better, as this one will set
11197 incorrect values for pasted .init/.fini fragments.
11198 (Fixed later in check_pasted_section.) */
11199 if (isec->makes_toc_func_call
11200 && elf_gp (isec->owner) != 0)
11201 htab->toc_curr = elf_gp (isec->owner);
11205 /* Functions that don't use the TOC can belong in any TOC group.
11206 Use the last TOC base. */
11207 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11211 /* Check that all .init and .fini sections use the same toc, if they
11212 have toc relocs. */
11215 check_pasted_section (struct bfd_link_info *info, const char *name)
11217 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11221 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11222 bfd_vma toc_off = 0;
11225 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11226 if (i->has_toc_reloc)
11229 toc_off = htab->stub_group[i->id].toc_off;
11230 else if (toc_off != htab->stub_group[i->id].toc_off)
11235 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11236 if (i->makes_toc_func_call)
11238 toc_off = htab->stub_group[i->id].toc_off;
11242 /* Make sure the whole pasted function uses the same toc offset. */
11244 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11245 htab->stub_group[i->id].toc_off = toc_off;
11251 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11253 return (check_pasted_section (info, ".init")
11254 & check_pasted_section (info, ".fini"));
11257 /* See whether we can group stub sections together. Grouping stub
11258 sections may result in fewer stubs. More importantly, we need to
11259 put all .init* and .fini* stubs at the beginning of the .init or
11260 .fini output sections respectively, because glibc splits the
11261 _init and _fini functions into multiple parts. Putting a stub in
11262 the middle of a function is not a good idea. */
11265 group_sections (struct ppc_link_hash_table *htab,
11266 bfd_size_type stub_group_size,
11267 bfd_boolean stubs_always_before_branch)
11270 bfd_size_type stub14_group_size;
11271 bfd_boolean suppress_size_errors;
11273 suppress_size_errors = FALSE;
11274 stub14_group_size = stub_group_size;
11275 if (stub_group_size == 1)
11277 /* Default values. */
11278 if (stubs_always_before_branch)
11280 stub_group_size = 0x1e00000;
11281 stub14_group_size = 0x7800;
11285 stub_group_size = 0x1c00000;
11286 stub14_group_size = 0x7000;
11288 suppress_size_errors = TRUE;
11291 list = htab->input_list + htab->top_index;
11294 asection *tail = *list;
11295 while (tail != NULL)
11299 bfd_size_type total;
11300 bfd_boolean big_sec;
11304 total = tail->size;
11305 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11306 && ppc64_elf_section_data (tail)->has_14bit_branch
11307 ? stub14_group_size : stub_group_size);
11308 if (big_sec && !suppress_size_errors)
11309 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11310 tail->owner, tail);
11311 curr_toc = htab->stub_group[tail->id].toc_off;
11313 while ((prev = PREV_SEC (curr)) != NULL
11314 && ((total += curr->output_offset - prev->output_offset)
11315 < (ppc64_elf_section_data (prev) != NULL
11316 && ppc64_elf_section_data (prev)->has_14bit_branch
11317 ? stub14_group_size : stub_group_size))
11318 && htab->stub_group[prev->id].toc_off == curr_toc)
11321 /* OK, the size from the start of CURR to the end is less
11322 than stub_group_size and thus can be handled by one stub
11323 section. (or the tail section is itself larger than
11324 stub_group_size, in which case we may be toast.) We
11325 should really be keeping track of the total size of stubs
11326 added here, as stubs contribute to the final output
11327 section size. That's a little tricky, and this way will
11328 only break if stubs added make the total size more than
11329 2^25, ie. for the default stub_group_size, if stubs total
11330 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11333 prev = PREV_SEC (tail);
11334 /* Set up this stub group. */
11335 htab->stub_group[tail->id].link_sec = curr;
11337 while (tail != curr && (tail = prev) != NULL);
11339 /* But wait, there's more! Input sections up to stub_group_size
11340 bytes before the stub section can be handled by it too.
11341 Don't do this if we have a really large section after the
11342 stubs, as adding more stubs increases the chance that
11343 branches may not reach into the stub section. */
11344 if (!stubs_always_before_branch && !big_sec)
11347 while (prev != NULL
11348 && ((total += tail->output_offset - prev->output_offset)
11349 < (ppc64_elf_section_data (prev) != NULL
11350 && ppc64_elf_section_data (prev)->has_14bit_branch
11351 ? stub14_group_size : stub_group_size))
11352 && htab->stub_group[prev->id].toc_off == curr_toc)
11355 prev = PREV_SEC (tail);
11356 htab->stub_group[tail->id].link_sec = curr;
11362 while (list-- != htab->input_list);
11363 free (htab->input_list);
11367 static const unsigned char glink_eh_frame_cie[] =
11369 0, 0, 0, 16, /* length. */
11370 0, 0, 0, 0, /* id. */
11371 1, /* CIE version. */
11372 'z', 'R', 0, /* Augmentation string. */
11373 4, /* Code alignment. */
11374 0x78, /* Data alignment. */
11376 1, /* Augmentation size. */
11377 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11378 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11381 /* Stripping output sections is normally done before dynamic section
11382 symbols have been allocated. This function is called later, and
11383 handles cases like htab->brlt which is mapped to its own output
11387 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11389 if (isec->size == 0
11390 && isec->output_section->size == 0
11391 && !(isec->output_section->flags & SEC_KEEP)
11392 && !bfd_section_removed_from_list (info->output_bfd,
11393 isec->output_section)
11394 && elf_section_data (isec->output_section)->dynindx == 0)
11396 isec->output_section->flags |= SEC_EXCLUDE;
11397 bfd_section_list_remove (info->output_bfd, isec->output_section);
11398 info->output_bfd->section_count--;
11402 /* Determine and set the size of the stub section for a final link.
11404 The basic idea here is to examine all the relocations looking for
11405 PC-relative calls to a target that is unreachable with a "bl"
11409 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11410 bfd_boolean plt_static_chain, int plt_thread_safe,
11411 int plt_stub_align)
11413 bfd_size_type stub_group_size;
11414 bfd_boolean stubs_always_before_branch;
11415 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11420 htab->plt_static_chain = plt_static_chain;
11421 htab->plt_stub_align = plt_stub_align;
11422 if (plt_thread_safe == -1 && !info->executable)
11423 plt_thread_safe = 1;
11424 if (plt_thread_safe == -1)
11426 static const char *const thread_starter[] =
11430 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11432 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11433 "mq_notify", "create_timer",
11437 "GOMP_parallel_start",
11438 "GOMP_parallel_loop_static_start",
11439 "GOMP_parallel_loop_dynamic_start",
11440 "GOMP_parallel_loop_guided_start",
11441 "GOMP_parallel_loop_runtime_start",
11442 "GOMP_parallel_sections_start",
11446 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11448 struct elf_link_hash_entry *h;
11449 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11450 FALSE, FALSE, TRUE);
11451 plt_thread_safe = h != NULL && h->ref_regular;
11452 if (plt_thread_safe)
11456 htab->plt_thread_safe = plt_thread_safe;
11457 stubs_always_before_branch = group_size < 0;
11458 if (group_size < 0)
11459 stub_group_size = -group_size;
11461 stub_group_size = group_size;
11463 group_sections (htab, stub_group_size, stubs_always_before_branch);
11468 unsigned int bfd_indx;
11469 asection *stub_sec;
11471 htab->stub_iteration += 1;
11473 for (input_bfd = info->input_bfds, bfd_indx = 0;
11475 input_bfd = input_bfd->link_next, bfd_indx++)
11477 Elf_Internal_Shdr *symtab_hdr;
11479 Elf_Internal_Sym *local_syms = NULL;
11481 if (!is_ppc64_elf (input_bfd))
11484 /* We'll need the symbol table in a second. */
11485 symtab_hdr = &elf_symtab_hdr (input_bfd);
11486 if (symtab_hdr->sh_info == 0)
11489 /* Walk over each section attached to the input bfd. */
11490 for (section = input_bfd->sections;
11492 section = section->next)
11494 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11496 /* If there aren't any relocs, then there's nothing more
11498 if ((section->flags & SEC_RELOC) == 0
11499 || (section->flags & SEC_ALLOC) == 0
11500 || (section->flags & SEC_LOAD) == 0
11501 || (section->flags & SEC_CODE) == 0
11502 || section->reloc_count == 0)
11505 /* If this section is a link-once section that will be
11506 discarded, then don't create any stubs. */
11507 if (section->output_section == NULL
11508 || section->output_section->owner != info->output_bfd)
11511 /* Get the relocs. */
11513 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11514 info->keep_memory);
11515 if (internal_relocs == NULL)
11516 goto error_ret_free_local;
11518 /* Now examine each relocation. */
11519 irela = internal_relocs;
11520 irelaend = irela + section->reloc_count;
11521 for (; irela < irelaend; irela++)
11523 enum elf_ppc64_reloc_type r_type;
11524 unsigned int r_indx;
11525 enum ppc_stub_type stub_type;
11526 struct ppc_stub_hash_entry *stub_entry;
11527 asection *sym_sec, *code_sec;
11528 bfd_vma sym_value, code_value;
11529 bfd_vma destination;
11530 bfd_boolean ok_dest;
11531 struct ppc_link_hash_entry *hash;
11532 struct ppc_link_hash_entry *fdh;
11533 struct elf_link_hash_entry *h;
11534 Elf_Internal_Sym *sym;
11536 const asection *id_sec;
11537 struct _opd_sec_data *opd;
11538 struct plt_entry *plt_ent;
11540 r_type = ELF64_R_TYPE (irela->r_info);
11541 r_indx = ELF64_R_SYM (irela->r_info);
11543 if (r_type >= R_PPC64_max)
11545 bfd_set_error (bfd_error_bad_value);
11546 goto error_ret_free_internal;
11549 /* Only look for stubs on branch instructions. */
11550 if (r_type != R_PPC64_REL24
11551 && r_type != R_PPC64_REL14
11552 && r_type != R_PPC64_REL14_BRTAKEN
11553 && r_type != R_PPC64_REL14_BRNTAKEN)
11556 /* Now determine the call target, its name, value,
11558 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11559 r_indx, input_bfd))
11560 goto error_ret_free_internal;
11561 hash = (struct ppc_link_hash_entry *) h;
11568 sym_value = sym->st_value;
11571 else if (hash->elf.root.type == bfd_link_hash_defined
11572 || hash->elf.root.type == bfd_link_hash_defweak)
11574 sym_value = hash->elf.root.u.def.value;
11575 if (sym_sec->output_section != NULL)
11578 else if (hash->elf.root.type == bfd_link_hash_undefweak
11579 || hash->elf.root.type == bfd_link_hash_undefined)
11581 /* Recognise an old ABI func code entry sym, and
11582 use the func descriptor sym instead if it is
11584 if (hash->elf.root.root.string[0] == '.'
11585 && (fdh = lookup_fdh (hash, htab)) != NULL)
11587 if (fdh->elf.root.type == bfd_link_hash_defined
11588 || fdh->elf.root.type == bfd_link_hash_defweak)
11590 sym_sec = fdh->elf.root.u.def.section;
11591 sym_value = fdh->elf.root.u.def.value;
11592 if (sym_sec->output_section != NULL)
11601 bfd_set_error (bfd_error_bad_value);
11602 goto error_ret_free_internal;
11608 sym_value += irela->r_addend;
11609 destination = (sym_value
11610 + sym_sec->output_offset
11611 + sym_sec->output_section->vma);
11614 code_sec = sym_sec;
11615 code_value = sym_value;
11616 opd = get_opd_info (sym_sec);
11621 if (hash == NULL && opd->adjust != NULL)
11623 long adjust = opd->adjust[sym_value / 8];
11626 code_value += adjust;
11627 sym_value += adjust;
11629 dest = opd_entry_value (sym_sec, sym_value,
11630 &code_sec, &code_value, FALSE);
11631 if (dest != (bfd_vma) -1)
11633 destination = dest;
11636 /* Fixup old ABI sym to point at code
11638 hash->elf.root.type = bfd_link_hash_defweak;
11639 hash->elf.root.u.def.section = code_sec;
11640 hash->elf.root.u.def.value = code_value;
11645 /* Determine what (if any) linker stub is needed. */
11647 stub_type = ppc_type_of_stub (section, irela, &hash,
11648 &plt_ent, destination);
11650 if (stub_type != ppc_stub_plt_call)
11652 /* Check whether we need a TOC adjusting stub.
11653 Since the linker pastes together pieces from
11654 different object files when creating the
11655 _init and _fini functions, it may be that a
11656 call to what looks like a local sym is in
11657 fact a call needing a TOC adjustment. */
11658 if (code_sec != NULL
11659 && code_sec->output_section != NULL
11660 && (htab->stub_group[code_sec->id].toc_off
11661 != htab->stub_group[section->id].toc_off)
11662 && (code_sec->has_toc_reloc
11663 || code_sec->makes_toc_func_call))
11664 stub_type = ppc_stub_long_branch_r2off;
11667 if (stub_type == ppc_stub_none)
11670 /* __tls_get_addr calls might be eliminated. */
11671 if (stub_type != ppc_stub_plt_call
11673 && (hash == htab->tls_get_addr
11674 || hash == htab->tls_get_addr_fd)
11675 && section->has_tls_reloc
11676 && irela != internal_relocs)
11678 /* Get tls info. */
11679 unsigned char *tls_mask;
11681 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11682 irela - 1, input_bfd))
11683 goto error_ret_free_internal;
11684 if (*tls_mask != 0)
11688 if (stub_type == ppc_stub_plt_call
11689 && irela + 1 < irelaend
11690 && irela[1].r_offset == irela->r_offset + 4
11691 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11693 if (!tocsave_find (htab, INSERT,
11694 &local_syms, irela + 1, input_bfd))
11695 goto error_ret_free_internal;
11697 else if (stub_type == ppc_stub_plt_call)
11698 stub_type = ppc_stub_plt_call_r2save;
11700 /* Support for grouping stub sections. */
11701 id_sec = htab->stub_group[section->id].link_sec;
11703 /* Get the name of this stub. */
11704 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11706 goto error_ret_free_internal;
11708 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11709 stub_name, FALSE, FALSE);
11710 if (stub_entry != NULL)
11712 /* The proper stub has already been created. */
11714 if (stub_type == ppc_stub_plt_call_r2save)
11715 stub_entry->stub_type = stub_type;
11719 stub_entry = ppc_add_stub (stub_name, section, info);
11720 if (stub_entry == NULL)
11723 error_ret_free_internal:
11724 if (elf_section_data (section)->relocs == NULL)
11725 free (internal_relocs);
11726 error_ret_free_local:
11727 if (local_syms != NULL
11728 && (symtab_hdr->contents
11729 != (unsigned char *) local_syms))
11734 stub_entry->stub_type = stub_type;
11735 if (stub_type != ppc_stub_plt_call
11736 && stub_type != ppc_stub_plt_call_r2save)
11738 stub_entry->target_value = code_value;
11739 stub_entry->target_section = code_sec;
11743 stub_entry->target_value = sym_value;
11744 stub_entry->target_section = sym_sec;
11746 stub_entry->h = hash;
11747 stub_entry->plt_ent = plt_ent;
11748 stub_entry->addend = irela->r_addend;
11750 if (stub_entry->h != NULL)
11751 htab->stub_globals += 1;
11754 /* We're done with the internal relocs, free them. */
11755 if (elf_section_data (section)->relocs != internal_relocs)
11756 free (internal_relocs);
11759 if (local_syms != NULL
11760 && symtab_hdr->contents != (unsigned char *) local_syms)
11762 if (!info->keep_memory)
11765 symtab_hdr->contents = (unsigned char *) local_syms;
11769 /* We may have added some stubs. Find out the new size of the
11771 for (stub_sec = htab->stub_bfd->sections;
11773 stub_sec = stub_sec->next)
11774 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11776 stub_sec->rawsize = stub_sec->size;
11777 stub_sec->size = 0;
11778 stub_sec->reloc_count = 0;
11779 stub_sec->flags &= ~SEC_RELOC;
11782 htab->brlt->size = 0;
11783 htab->brlt->reloc_count = 0;
11784 htab->brlt->flags &= ~SEC_RELOC;
11785 if (htab->relbrlt != NULL)
11786 htab->relbrlt->size = 0;
11788 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11790 if (info->emitrelocations
11791 && htab->glink != NULL && htab->glink->size != 0)
11793 htab->glink->reloc_count = 1;
11794 htab->glink->flags |= SEC_RELOC;
11797 if (htab->glink_eh_frame != NULL
11798 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11799 && htab->glink_eh_frame->output_section->size != 0)
11801 size_t size = 0, align;
11803 for (stub_sec = htab->stub_bfd->sections;
11805 stub_sec = stub_sec->next)
11806 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11808 if (htab->glink != NULL && htab->glink->size != 0)
11811 size += sizeof (glink_eh_frame_cie);
11813 align <<= htab->glink_eh_frame->output_section->alignment_power;
11815 size = (size + align) & ~align;
11816 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11817 htab->glink_eh_frame->size = size;
11820 if (htab->plt_stub_align != 0)
11821 for (stub_sec = htab->stub_bfd->sections;
11823 stub_sec = stub_sec->next)
11824 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11825 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11826 & (-1 << htab->plt_stub_align));
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->rawsize != stub_sec->size)
11835 /* Exit from this loop when no stubs have been added, and no stubs
11836 have changed size. */
11837 if (stub_sec == NULL
11838 && (htab->glink_eh_frame == NULL
11839 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11842 /* Ask the linker to do its stuff. */
11843 (*htab->layout_sections_again) ();
11846 maybe_strip_output (info, htab->brlt);
11847 if (htab->glink_eh_frame != NULL)
11848 maybe_strip_output (info, htab->glink_eh_frame);
11853 /* Called after we have determined section placement. If sections
11854 move, we'll be called again. Provide a value for TOCstart. */
11857 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
11862 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11863 order. The TOC starts where the first of these sections starts. */
11864 s = bfd_get_section_by_name (obfd, ".got");
11865 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11866 s = bfd_get_section_by_name (obfd, ".toc");
11867 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11868 s = bfd_get_section_by_name (obfd, ".tocbss");
11869 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11870 s = bfd_get_section_by_name (obfd, ".plt");
11871 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11873 /* This may happen for
11874 o references to TOC base (SYM@toc / TOC[tc0]) without a
11876 o bad linker script
11877 o --gc-sections and empty TOC sections
11879 FIXME: Warn user? */
11881 /* Look for a likely section. We probably won't even be
11883 for (s = obfd->sections; s != NULL; s = s->next)
11884 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11886 == (SEC_ALLOC | SEC_SMALL_DATA))
11889 for (s = obfd->sections; s != NULL; s = s->next)
11890 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11891 == (SEC_ALLOC | SEC_SMALL_DATA))
11894 for (s = obfd->sections; s != NULL; s = s->next)
11895 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11899 for (s = obfd->sections; s != NULL; s = s->next)
11900 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11906 TOCstart = s->output_section->vma + s->output_offset;
11908 _bfd_set_gp_value (obfd, TOCstart);
11910 if (info != NULL && s != NULL && is_ppc64_elf (obfd))
11912 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11915 && htab->elf.hgot != NULL)
11917 htab->elf.hgot->root.type = bfd_link_hash_defined;
11918 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
11919 htab->elf.hgot->root.u.def.section = s;
11925 /* Build all the stubs associated with the current output file.
11926 The stubs are kept in a hash table attached to the main linker
11927 hash table. This function is called via gldelf64ppc_finish. */
11930 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11931 struct bfd_link_info *info,
11934 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11935 asection *stub_sec;
11937 int stub_sec_count = 0;
11942 htab->emit_stub_syms = emit_stub_syms;
11944 /* Allocate memory to hold the linker stubs. */
11945 for (stub_sec = htab->stub_bfd->sections;
11947 stub_sec = stub_sec->next)
11948 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11949 && stub_sec->size != 0)
11951 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11952 if (stub_sec->contents == NULL)
11954 /* We want to check that built size is the same as calculated
11955 size. rawsize is a convenient location to use. */
11956 stub_sec->rawsize = stub_sec->size;
11957 stub_sec->size = 0;
11960 if (htab->glink != NULL && htab->glink->size != 0)
11965 /* Build the .glink plt call stub. */
11966 if (htab->emit_stub_syms)
11968 struct elf_link_hash_entry *h;
11969 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11970 TRUE, FALSE, FALSE);
11973 if (h->root.type == bfd_link_hash_new)
11975 h->root.type = bfd_link_hash_defined;
11976 h->root.u.def.section = htab->glink;
11977 h->root.u.def.value = 8;
11978 h->ref_regular = 1;
11979 h->def_regular = 1;
11980 h->ref_regular_nonweak = 1;
11981 h->forced_local = 1;
11985 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11986 if (info->emitrelocations)
11988 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11991 r->r_offset = (htab->glink->output_offset
11992 + htab->glink->output_section->vma);
11993 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11994 r->r_addend = plt0;
11996 p = htab->glink->contents;
11997 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11998 bfd_put_64 (htab->glink->owner, plt0, p);
12000 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12002 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12004 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12006 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
12008 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12010 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
12012 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
12014 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
12016 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
12018 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
12020 bfd_put_32 (htab->glink->owner, BCTR, p);
12022 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12024 bfd_put_32 (htab->glink->owner, NOP, p);
12028 /* Build the .glink lazy link call stubs. */
12030 while (p < htab->glink->contents + htab->glink->size)
12034 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12039 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12041 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
12044 bfd_put_32 (htab->glink->owner,
12045 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12049 htab->glink->rawsize = p - htab->glink->contents;
12052 if (htab->brlt->size != 0)
12054 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12056 if (htab->brlt->contents == NULL)
12059 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12061 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12062 htab->relbrlt->size);
12063 if (htab->relbrlt->contents == NULL)
12067 if (htab->glink_eh_frame != NULL
12068 && htab->glink_eh_frame->size != 0)
12071 bfd_byte *last_fde;
12072 size_t last_fde_len, size, align, pad;
12074 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12077 htab->glink_eh_frame->contents = p;
12080 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12082 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12083 /* CIE length (rewrite in case little-endian). */
12084 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12085 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12086 p += sizeof (glink_eh_frame_cie);
12088 for (stub_sec = htab->stub_bfd->sections;
12090 stub_sec = stub_sec->next)
12091 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12096 bfd_put_32 (htab->elf.dynobj, 16, p);
12099 val = p - htab->glink_eh_frame->contents;
12100 bfd_put_32 (htab->elf.dynobj, val, p);
12102 /* Offset to stub section. */
12103 val = (stub_sec->output_section->vma
12104 + stub_sec->output_offset);
12105 val -= (htab->glink_eh_frame->output_section->vma
12106 + htab->glink_eh_frame->output_offset);
12107 val -= p - htab->glink_eh_frame->contents;
12108 if (val + 0x80000000 > 0xffffffff)
12110 info->callbacks->einfo
12111 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12115 bfd_put_32 (htab->elf.dynobj, val, p);
12117 /* stub section size. */
12118 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12120 /* Augmentation. */
12125 if (htab->glink != NULL && htab->glink->size != 0)
12130 bfd_put_32 (htab->elf.dynobj, 20, p);
12133 val = p - htab->glink_eh_frame->contents;
12134 bfd_put_32 (htab->elf.dynobj, val, p);
12136 /* Offset to .glink. */
12137 val = (htab->glink->output_section->vma
12138 + htab->glink->output_offset
12140 val -= (htab->glink_eh_frame->output_section->vma
12141 + htab->glink_eh_frame->output_offset);
12142 val -= p - htab->glink_eh_frame->contents;
12143 if (val + 0x80000000 > 0xffffffff)
12145 info->callbacks->einfo
12146 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12147 htab->glink->name);
12150 bfd_put_32 (htab->elf.dynobj, val, p);
12153 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
12155 /* Augmentation. */
12158 *p++ = DW_CFA_advance_loc + 1;
12159 *p++ = DW_CFA_register;
12162 *p++ = DW_CFA_advance_loc + 4;
12163 *p++ = DW_CFA_restore_extended;
12166 /* Subsume any padding into the last FDE if user .eh_frame
12167 sections are aligned more than glink_eh_frame. Otherwise any
12168 zero padding will be seen as a terminator. */
12169 size = p - htab->glink_eh_frame->contents;
12171 align <<= htab->glink_eh_frame->output_section->alignment_power;
12173 pad = ((size + align) & ~align) - size;
12174 htab->glink_eh_frame->size = size + pad;
12175 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12178 /* Build the stubs as directed by the stub hash table. */
12179 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12181 if (htab->relbrlt != NULL)
12182 htab->relbrlt->reloc_count = 0;
12184 if (htab->plt_stub_align != 0)
12185 for (stub_sec = htab->stub_bfd->sections;
12187 stub_sec = stub_sec->next)
12188 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12189 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12190 & (-1 << htab->plt_stub_align));
12192 for (stub_sec = htab->stub_bfd->sections;
12194 stub_sec = stub_sec->next)
12195 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12197 stub_sec_count += 1;
12198 if (stub_sec->rawsize != stub_sec->size)
12202 if (stub_sec != NULL
12203 || htab->glink->rawsize != htab->glink->size
12204 || (htab->glink_eh_frame != NULL
12205 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12207 htab->stub_error = TRUE;
12208 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12211 if (htab->stub_error)
12216 *stats = bfd_malloc (500);
12217 if (*stats == NULL)
12220 sprintf (*stats, _("linker stubs in %u group%s\n"
12222 " toc adjust %lu\n"
12223 " long branch %lu\n"
12224 " long toc adj %lu\n"
12226 " plt call toc %lu"),
12228 stub_sec_count == 1 ? "" : "s",
12229 htab->stub_count[ppc_stub_long_branch - 1],
12230 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12231 htab->stub_count[ppc_stub_plt_branch - 1],
12232 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12233 htab->stub_count[ppc_stub_plt_call - 1],
12234 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12239 /* This function undoes the changes made by add_symbol_adjust. */
12242 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12244 struct ppc_link_hash_entry *eh;
12246 if (h->root.type == bfd_link_hash_indirect)
12249 eh = (struct ppc_link_hash_entry *) h;
12250 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12253 eh->elf.root.type = bfd_link_hash_undefined;
12258 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12260 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12263 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12266 /* What to do when ld finds relocations against symbols defined in
12267 discarded sections. */
12269 static unsigned int
12270 ppc64_elf_action_discarded (asection *sec)
12272 if (strcmp (".opd", sec->name) == 0)
12275 if (strcmp (".toc", sec->name) == 0)
12278 if (strcmp (".toc1", sec->name) == 0)
12281 return _bfd_elf_default_action_discarded (sec);
12284 /* The RELOCATE_SECTION function is called by the ELF backend linker
12285 to handle the relocations for a section.
12287 The relocs are always passed as Rela structures; if the section
12288 actually uses Rel structures, the r_addend field will always be
12291 This function is responsible for adjust the section contents as
12292 necessary, and (if using Rela relocs and generating a
12293 relocatable output file) adjusting the reloc addend as
12296 This function does not have to worry about setting the reloc
12297 address or the reloc symbol index.
12299 LOCAL_SYMS is a pointer to the swapped in local symbols.
12301 LOCAL_SECTIONS is an array giving the section in the input file
12302 corresponding to the st_shndx field of each local symbol.
12304 The global hash table entry for the global symbols can be found
12305 via elf_sym_hashes (input_bfd).
12307 When generating relocatable output, this function must handle
12308 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12309 going to be the section symbol corresponding to the output
12310 section, which means that the addend must be adjusted
12314 ppc64_elf_relocate_section (bfd *output_bfd,
12315 struct bfd_link_info *info,
12317 asection *input_section,
12318 bfd_byte *contents,
12319 Elf_Internal_Rela *relocs,
12320 Elf_Internal_Sym *local_syms,
12321 asection **local_sections)
12323 struct ppc_link_hash_table *htab;
12324 Elf_Internal_Shdr *symtab_hdr;
12325 struct elf_link_hash_entry **sym_hashes;
12326 Elf_Internal_Rela *rel;
12327 Elf_Internal_Rela *relend;
12328 Elf_Internal_Rela outrel;
12330 struct got_entry **local_got_ents;
12332 bfd_boolean ret = TRUE;
12333 bfd_boolean is_opd;
12334 /* Assume 'at' branch hints. */
12335 bfd_boolean is_isa_v2 = TRUE;
12336 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12338 /* Initialize howto table if needed. */
12339 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12342 htab = ppc_hash_table (info);
12346 /* Don't relocate stub sections. */
12347 if (input_section->owner == htab->stub_bfd)
12350 BFD_ASSERT (is_ppc64_elf (input_bfd));
12352 local_got_ents = elf_local_got_ents (input_bfd);
12353 TOCstart = elf_gp (output_bfd);
12354 symtab_hdr = &elf_symtab_hdr (input_bfd);
12355 sym_hashes = elf_sym_hashes (input_bfd);
12356 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12359 relend = relocs + input_section->reloc_count;
12360 for (; rel < relend; rel++)
12362 enum elf_ppc64_reloc_type r_type;
12364 bfd_reloc_status_type r;
12365 Elf_Internal_Sym *sym;
12367 struct elf_link_hash_entry *h_elf;
12368 struct ppc_link_hash_entry *h;
12369 struct ppc_link_hash_entry *fdh;
12370 const char *sym_name;
12371 unsigned long r_symndx, toc_symndx;
12372 bfd_vma toc_addend;
12373 unsigned char tls_mask, tls_gd, tls_type;
12374 unsigned char sym_type;
12375 bfd_vma relocation;
12376 bfd_boolean unresolved_reloc;
12377 bfd_boolean warned;
12378 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12381 struct ppc_stub_hash_entry *stub_entry;
12382 bfd_vma max_br_offset;
12384 const Elf_Internal_Rela orig_rel = *rel;
12386 r_type = ELF64_R_TYPE (rel->r_info);
12387 r_symndx = ELF64_R_SYM (rel->r_info);
12389 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12390 symbol of the previous ADDR64 reloc. The symbol gives us the
12391 proper TOC base to use. */
12392 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12394 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12396 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12402 unresolved_reloc = FALSE;
12405 if (r_symndx < symtab_hdr->sh_info)
12407 /* It's a local symbol. */
12408 struct _opd_sec_data *opd;
12410 sym = local_syms + r_symndx;
12411 sec = local_sections[r_symndx];
12412 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12413 sym_type = ELF64_ST_TYPE (sym->st_info);
12414 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12415 opd = get_opd_info (sec);
12416 if (opd != NULL && opd->adjust != NULL)
12418 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12423 /* If this is a relocation against the opd section sym
12424 and we have edited .opd, adjust the reloc addend so
12425 that ld -r and ld --emit-relocs output is correct.
12426 If it is a reloc against some other .opd symbol,
12427 then the symbol value will be adjusted later. */
12428 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12429 rel->r_addend += adjust;
12431 relocation += adjust;
12437 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12438 r_symndx, symtab_hdr, sym_hashes,
12439 h_elf, sec, relocation,
12440 unresolved_reloc, warned);
12441 sym_name = h_elf->root.root.string;
12442 sym_type = h_elf->type;
12444 && sec->owner == output_bfd
12445 && strcmp (sec->name, ".opd") == 0)
12447 /* This is a symbol defined in a linker script. All
12448 such are defined in output sections, even those
12449 defined by simple assignment from a symbol defined in
12450 an input section. Transfer the symbol to an
12451 appropriate input .opd section, so that a branch to
12452 this symbol will be mapped to the location specified
12453 by the opd entry. */
12454 struct bfd_link_order *lo;
12455 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
12456 if (lo->type == bfd_indirect_link_order)
12458 asection *isec = lo->u.indirect.section;
12459 if (h_elf->root.u.def.value >= isec->output_offset
12460 && h_elf->root.u.def.value < (isec->output_offset
12463 h_elf->root.u.def.value -= isec->output_offset;
12464 h_elf->root.u.def.section = isec;
12471 h = (struct ppc_link_hash_entry *) h_elf;
12473 if (sec != NULL && discarded_section (sec))
12474 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12476 ppc64_elf_howto_table[r_type], 0,
12479 if (info->relocatable)
12482 if (h != NULL && &h->elf == htab->elf.hgot)
12484 relocation = (TOCstart
12485 + htab->stub_group[input_section->id].toc_off);
12486 sec = bfd_abs_section_ptr;
12487 unresolved_reloc = FALSE;
12490 /* TLS optimizations. Replace instruction sequences and relocs
12491 based on information we collected in tls_optimize. We edit
12492 RELOCS so that --emit-relocs will output something sensible
12493 for the final instruction stream. */
12498 tls_mask = h->tls_mask;
12499 else if (local_got_ents != NULL)
12501 struct plt_entry **local_plt = (struct plt_entry **)
12502 (local_got_ents + symtab_hdr->sh_info);
12503 unsigned char *lgot_masks = (unsigned char *)
12504 (local_plt + symtab_hdr->sh_info);
12505 tls_mask = lgot_masks[r_symndx];
12508 && (r_type == R_PPC64_TLS
12509 || r_type == R_PPC64_TLSGD
12510 || r_type == R_PPC64_TLSLD))
12512 /* Check for toc tls entries. */
12513 unsigned char *toc_tls;
12515 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12516 &local_syms, rel, input_bfd))
12520 tls_mask = *toc_tls;
12523 /* Check that tls relocs are used with tls syms, and non-tls
12524 relocs are used with non-tls syms. */
12525 if (r_symndx != STN_UNDEF
12526 && r_type != R_PPC64_NONE
12528 || h->elf.root.type == bfd_link_hash_defined
12529 || h->elf.root.type == bfd_link_hash_defweak)
12530 && (IS_PPC64_TLS_RELOC (r_type)
12531 != (sym_type == STT_TLS
12532 || (sym_type == STT_SECTION
12533 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12536 && (r_type == R_PPC64_TLS
12537 || r_type == R_PPC64_TLSGD
12538 || r_type == R_PPC64_TLSLD))
12539 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12542 info->callbacks->einfo
12543 (!IS_PPC64_TLS_RELOC (r_type)
12544 ? _("%P: %H: %s used with TLS symbol `%T'\n")
12545 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
12546 input_bfd, input_section, rel->r_offset,
12547 ppc64_elf_howto_table[r_type]->name,
12551 /* Ensure reloc mapping code below stays sane. */
12552 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12553 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12554 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12555 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12556 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12557 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12558 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12559 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12560 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12561 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12569 case R_PPC64_LO_DS_OPT:
12570 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12571 if ((insn & (0x3f << 26)) != 58u << 26)
12573 insn += (14u << 26) - (58u << 26);
12574 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12575 r_type = R_PPC64_TOC16_LO;
12576 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12579 case R_PPC64_TOC16:
12580 case R_PPC64_TOC16_LO:
12581 case R_PPC64_TOC16_DS:
12582 case R_PPC64_TOC16_LO_DS:
12584 /* Check for toc tls entries. */
12585 unsigned char *toc_tls;
12588 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12589 &local_syms, rel, input_bfd);
12595 tls_mask = *toc_tls;
12596 if (r_type == R_PPC64_TOC16_DS
12597 || r_type == R_PPC64_TOC16_LO_DS)
12600 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12605 /* If we found a GD reloc pair, then we might be
12606 doing a GD->IE transition. */
12609 tls_gd = TLS_TPRELGD;
12610 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12613 else if (retval == 3)
12615 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12623 case R_PPC64_GOT_TPREL16_HI:
12624 case R_PPC64_GOT_TPREL16_HA:
12626 && (tls_mask & TLS_TPREL) == 0)
12628 rel->r_offset -= d_offset;
12629 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12630 r_type = R_PPC64_NONE;
12631 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12635 case R_PPC64_GOT_TPREL16_DS:
12636 case R_PPC64_GOT_TPREL16_LO_DS:
12638 && (tls_mask & TLS_TPREL) == 0)
12641 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12643 insn |= 0x3c0d0000; /* addis 0,13,0 */
12644 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12645 r_type = R_PPC64_TPREL16_HA;
12646 if (toc_symndx != 0)
12648 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12649 rel->r_addend = toc_addend;
12650 /* We changed the symbol. Start over in order to
12651 get h, sym, sec etc. right. */
12656 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12662 && (tls_mask & TLS_TPREL) == 0)
12664 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12665 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12668 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12669 /* Was PPC64_TLS which sits on insn boundary, now
12670 PPC64_TPREL16_LO which is at low-order half-word. */
12671 rel->r_offset += d_offset;
12672 r_type = R_PPC64_TPREL16_LO;
12673 if (toc_symndx != 0)
12675 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12676 rel->r_addend = toc_addend;
12677 /* We changed the symbol. Start over in order to
12678 get h, sym, sec etc. right. */
12683 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12687 case R_PPC64_GOT_TLSGD16_HI:
12688 case R_PPC64_GOT_TLSGD16_HA:
12689 tls_gd = TLS_TPRELGD;
12690 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12694 case R_PPC64_GOT_TLSLD16_HI:
12695 case R_PPC64_GOT_TLSLD16_HA:
12696 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12699 if ((tls_mask & tls_gd) != 0)
12700 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12701 + R_PPC64_GOT_TPREL16_DS);
12704 rel->r_offset -= d_offset;
12705 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12706 r_type = R_PPC64_NONE;
12708 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12712 case R_PPC64_GOT_TLSGD16:
12713 case R_PPC64_GOT_TLSGD16_LO:
12714 tls_gd = TLS_TPRELGD;
12715 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12719 case R_PPC64_GOT_TLSLD16:
12720 case R_PPC64_GOT_TLSLD16_LO:
12721 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12723 unsigned int insn1, insn2, insn3;
12727 offset = (bfd_vma) -1;
12728 /* If not using the newer R_PPC64_TLSGD/LD to mark
12729 __tls_get_addr calls, we must trust that the call
12730 stays with its arg setup insns, ie. that the next
12731 reloc is the __tls_get_addr call associated with
12732 the current reloc. Edit both insns. */
12733 if (input_section->has_tls_get_addr_call
12734 && rel + 1 < relend
12735 && branch_reloc_hash_match (input_bfd, rel + 1,
12736 htab->tls_get_addr,
12737 htab->tls_get_addr_fd))
12738 offset = rel[1].r_offset;
12739 if ((tls_mask & tls_gd) != 0)
12742 insn1 = bfd_get_32 (output_bfd,
12743 contents + rel->r_offset - d_offset);
12744 insn1 &= (1 << 26) - (1 << 2);
12745 insn1 |= 58 << 26; /* ld */
12746 insn2 = 0x7c636a14; /* add 3,3,13 */
12747 if (offset != (bfd_vma) -1)
12748 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12749 if ((tls_mask & TLS_EXPLICIT) == 0)
12750 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12751 + R_PPC64_GOT_TPREL16_DS);
12753 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12754 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12759 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12760 insn2 = 0x38630000; /* addi 3,3,0 */
12763 /* Was an LD reloc. */
12765 sec = local_sections[toc_symndx];
12767 r_symndx < symtab_hdr->sh_info;
12769 if (local_sections[r_symndx] == sec)
12771 if (r_symndx >= symtab_hdr->sh_info)
12772 r_symndx = STN_UNDEF;
12773 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12774 if (r_symndx != STN_UNDEF)
12775 rel->r_addend -= (local_syms[r_symndx].st_value
12776 + sec->output_offset
12777 + sec->output_section->vma);
12779 else if (toc_symndx != 0)
12781 r_symndx = toc_symndx;
12782 rel->r_addend = toc_addend;
12784 r_type = R_PPC64_TPREL16_HA;
12785 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12786 if (offset != (bfd_vma) -1)
12788 rel[1].r_info = ELF64_R_INFO (r_symndx,
12789 R_PPC64_TPREL16_LO);
12790 rel[1].r_offset = offset + d_offset;
12791 rel[1].r_addend = rel->r_addend;
12794 bfd_put_32 (output_bfd, insn1,
12795 contents + rel->r_offset - d_offset);
12796 if (offset != (bfd_vma) -1)
12798 insn3 = bfd_get_32 (output_bfd,
12799 contents + offset + 4);
12801 || insn3 == CROR_151515 || insn3 == CROR_313131)
12803 rel[1].r_offset += 4;
12804 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12807 bfd_put_32 (output_bfd, insn2, contents + offset);
12809 if ((tls_mask & tls_gd) == 0
12810 && (tls_gd == 0 || toc_symndx != 0))
12812 /* We changed the symbol. Start over in order
12813 to get h, sym, sec etc. right. */
12820 case R_PPC64_TLSGD:
12821 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12823 unsigned int insn2, insn3;
12824 bfd_vma offset = rel->r_offset;
12826 if ((tls_mask & TLS_TPRELGD) != 0)
12829 r_type = R_PPC64_NONE;
12830 insn2 = 0x7c636a14; /* add 3,3,13 */
12835 if (toc_symndx != 0)
12837 r_symndx = toc_symndx;
12838 rel->r_addend = toc_addend;
12840 r_type = R_PPC64_TPREL16_LO;
12841 rel->r_offset = offset + d_offset;
12842 insn2 = 0x38630000; /* addi 3,3,0 */
12844 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12845 /* Zap the reloc on the _tls_get_addr call too. */
12846 BFD_ASSERT (offset == rel[1].r_offset);
12847 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12848 insn3 = bfd_get_32 (output_bfd,
12849 contents + offset + 4);
12851 || insn3 == CROR_151515 || insn3 == CROR_313131)
12853 rel->r_offset += 4;
12854 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12857 bfd_put_32 (output_bfd, insn2, contents + offset);
12858 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12866 case R_PPC64_TLSLD:
12867 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12869 unsigned int insn2, insn3;
12870 bfd_vma offset = rel->r_offset;
12873 sec = local_sections[toc_symndx];
12875 r_symndx < symtab_hdr->sh_info;
12877 if (local_sections[r_symndx] == sec)
12879 if (r_symndx >= symtab_hdr->sh_info)
12880 r_symndx = STN_UNDEF;
12881 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12882 if (r_symndx != STN_UNDEF)
12883 rel->r_addend -= (local_syms[r_symndx].st_value
12884 + sec->output_offset
12885 + sec->output_section->vma);
12887 r_type = R_PPC64_TPREL16_LO;
12888 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12889 rel->r_offset = offset + d_offset;
12890 /* Zap the reloc on the _tls_get_addr call too. */
12891 BFD_ASSERT (offset == rel[1].r_offset);
12892 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12893 insn2 = 0x38630000; /* addi 3,3,0 */
12894 insn3 = bfd_get_32 (output_bfd,
12895 contents + offset + 4);
12897 || insn3 == CROR_151515 || insn3 == CROR_313131)
12899 rel->r_offset += 4;
12900 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12903 bfd_put_32 (output_bfd, insn2, contents + offset);
12909 case R_PPC64_DTPMOD64:
12910 if (rel + 1 < relend
12911 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12912 && rel[1].r_offset == rel->r_offset + 8)
12914 if ((tls_mask & TLS_GD) == 0)
12916 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12917 if ((tls_mask & TLS_TPRELGD) != 0)
12918 r_type = R_PPC64_TPREL64;
12921 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12922 r_type = R_PPC64_NONE;
12924 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12929 if ((tls_mask & TLS_LD) == 0)
12931 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12932 r_type = R_PPC64_NONE;
12933 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12938 case R_PPC64_TPREL64:
12939 if ((tls_mask & TLS_TPREL) == 0)
12941 r_type = R_PPC64_NONE;
12942 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12947 /* Handle other relocations that tweak non-addend part of insn. */
12949 max_br_offset = 1 << 25;
12950 addend = rel->r_addend;
12951 reloc_dest = DEST_NORMAL;
12957 case R_PPC64_TOCSAVE:
12958 if (relocation + addend == (rel->r_offset
12959 + input_section->output_offset
12960 + input_section->output_section->vma)
12961 && tocsave_find (htab, NO_INSERT,
12962 &local_syms, rel, input_bfd))
12964 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12966 || insn == CROR_151515 || insn == CROR_313131)
12967 bfd_put_32 (input_bfd, STD_R2_40R1,
12968 contents + rel->r_offset);
12972 /* Branch taken prediction relocations. */
12973 case R_PPC64_ADDR14_BRTAKEN:
12974 case R_PPC64_REL14_BRTAKEN:
12975 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12978 /* Branch not taken prediction relocations. */
12979 case R_PPC64_ADDR14_BRNTAKEN:
12980 case R_PPC64_REL14_BRNTAKEN:
12981 insn |= bfd_get_32 (output_bfd,
12982 contents + rel->r_offset) & ~(0x01 << 21);
12985 case R_PPC64_REL14:
12986 max_br_offset = 1 << 15;
12989 case R_PPC64_REL24:
12990 /* Calls to functions with a different TOC, such as calls to
12991 shared objects, need to alter the TOC pointer. This is
12992 done using a linkage stub. A REL24 branching to these
12993 linkage stubs needs to be followed by a nop, as the nop
12994 will be replaced with an instruction to restore the TOC
12999 && h->oh->is_func_descriptor)
13000 fdh = ppc_follow_link (h->oh);
13001 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13003 if (stub_entry != NULL
13004 && (stub_entry->stub_type == ppc_stub_plt_call
13005 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13006 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13007 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13009 bfd_boolean can_plt_call = FALSE;
13011 if (rel->r_offset + 8 <= input_section->size)
13014 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13016 || nop == CROR_151515 || nop == CROR_313131)
13019 && (h == htab->tls_get_addr_fd
13020 || h == htab->tls_get_addr)
13021 && !htab->no_tls_get_addr_opt)
13023 /* Special stub used, leave nop alone. */
13026 bfd_put_32 (input_bfd, LD_R2_40R1,
13027 contents + rel->r_offset + 4);
13028 can_plt_call = TRUE;
13034 if (stub_entry->stub_type == ppc_stub_plt_call
13035 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13037 /* If this is a plain branch rather than a branch
13038 and link, don't require a nop. However, don't
13039 allow tail calls in a shared library as they
13040 will result in r2 being corrupted. */
13042 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
13043 if (info->executable && (br & 1) == 0)
13044 can_plt_call = TRUE;
13049 && strcmp (h->elf.root.root.string,
13050 ".__libc_start_main") == 0)
13052 /* Allow crt1 branch to go via a toc adjusting stub. */
13053 can_plt_call = TRUE;
13057 info->callbacks->einfo
13058 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13059 "recompile with -fPIC"),
13060 input_bfd, input_section, rel->r_offset, sym_name);
13062 bfd_set_error (bfd_error_bad_value);
13068 && (stub_entry->stub_type == ppc_stub_plt_call
13069 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13070 unresolved_reloc = FALSE;
13073 if ((stub_entry == NULL
13074 || stub_entry->stub_type == ppc_stub_long_branch
13075 || stub_entry->stub_type == ppc_stub_plt_branch)
13076 && get_opd_info (sec) != NULL)
13078 /* The branch destination is the value of the opd entry. */
13079 bfd_vma off = (relocation + addend
13080 - sec->output_section->vma
13081 - sec->output_offset);
13082 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13083 if (dest != (bfd_vma) -1)
13087 reloc_dest = DEST_OPD;
13091 /* If the branch is out of reach we ought to have a long
13093 from = (rel->r_offset
13094 + input_section->output_offset
13095 + input_section->output_section->vma);
13097 if (stub_entry != NULL
13098 && (stub_entry->stub_type == ppc_stub_long_branch
13099 || stub_entry->stub_type == ppc_stub_plt_branch)
13100 && (r_type == R_PPC64_ADDR14_BRTAKEN
13101 || r_type == R_PPC64_ADDR14_BRNTAKEN
13102 || (relocation + addend - from + max_br_offset
13103 < 2 * max_br_offset)))
13104 /* Don't use the stub if this branch is in range. */
13107 if (stub_entry != NULL)
13109 /* Munge up the value and addend so that we call the stub
13110 rather than the procedure directly. */
13111 relocation = (stub_entry->stub_offset
13112 + stub_entry->stub_sec->output_offset
13113 + stub_entry->stub_sec->output_section->vma);
13115 reloc_dest = DEST_STUB;
13117 if ((stub_entry->stub_type == ppc_stub_plt_call
13118 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13119 && (ALWAYS_EMIT_R2SAVE
13120 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13121 && rel + 1 < relend
13122 && rel[1].r_offset == rel->r_offset + 4
13123 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13131 /* Set 'a' bit. This is 0b00010 in BO field for branch
13132 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13133 for branch on CTR insns (BO == 1a00t or 1a01t). */
13134 if ((insn & (0x14 << 21)) == (0x04 << 21))
13135 insn |= 0x02 << 21;
13136 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13137 insn |= 0x08 << 21;
13143 /* Invert 'y' bit if not the default. */
13144 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13145 insn ^= 0x01 << 21;
13148 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13151 /* NOP out calls to undefined weak functions.
13152 We can thus call a weak function without first
13153 checking whether the function is defined. */
13155 && h->elf.root.type == bfd_link_hash_undefweak
13156 && h->elf.dynindx == -1
13157 && r_type == R_PPC64_REL24
13161 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13167 /* Set `addend'. */
13172 info->callbacks->einfo
13173 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13174 input_bfd, (int) r_type, sym_name);
13176 bfd_set_error (bfd_error_bad_value);
13182 case R_PPC64_TLSGD:
13183 case R_PPC64_TLSLD:
13184 case R_PPC64_TOCSAVE:
13185 case R_PPC64_GNU_VTINHERIT:
13186 case R_PPC64_GNU_VTENTRY:
13189 /* GOT16 relocations. Like an ADDR16 using the symbol's
13190 address in the GOT as relocation value instead of the
13191 symbol's value itself. Also, create a GOT entry for the
13192 symbol and put the symbol value there. */
13193 case R_PPC64_GOT_TLSGD16:
13194 case R_PPC64_GOT_TLSGD16_LO:
13195 case R_PPC64_GOT_TLSGD16_HI:
13196 case R_PPC64_GOT_TLSGD16_HA:
13197 tls_type = TLS_TLS | TLS_GD;
13200 case R_PPC64_GOT_TLSLD16:
13201 case R_PPC64_GOT_TLSLD16_LO:
13202 case R_PPC64_GOT_TLSLD16_HI:
13203 case R_PPC64_GOT_TLSLD16_HA:
13204 tls_type = TLS_TLS | TLS_LD;
13207 case R_PPC64_GOT_TPREL16_DS:
13208 case R_PPC64_GOT_TPREL16_LO_DS:
13209 case R_PPC64_GOT_TPREL16_HI:
13210 case R_PPC64_GOT_TPREL16_HA:
13211 tls_type = TLS_TLS | TLS_TPREL;
13214 case R_PPC64_GOT_DTPREL16_DS:
13215 case R_PPC64_GOT_DTPREL16_LO_DS:
13216 case R_PPC64_GOT_DTPREL16_HI:
13217 case R_PPC64_GOT_DTPREL16_HA:
13218 tls_type = TLS_TLS | TLS_DTPREL;
13221 case R_PPC64_GOT16:
13222 case R_PPC64_GOT16_LO:
13223 case R_PPC64_GOT16_HI:
13224 case R_PPC64_GOT16_HA:
13225 case R_PPC64_GOT16_DS:
13226 case R_PPC64_GOT16_LO_DS:
13229 /* Relocation is to the entry for this symbol in the global
13234 unsigned long indx = 0;
13235 struct got_entry *ent;
13237 if (tls_type == (TLS_TLS | TLS_LD)
13239 || !h->elf.def_dynamic))
13240 ent = ppc64_tlsld_got (input_bfd);
13246 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13247 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13250 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13251 /* This is actually a static link, or it is a
13252 -Bsymbolic link and the symbol is defined
13253 locally, or the symbol was forced to be local
13254 because of a version file. */
13258 BFD_ASSERT (h->elf.dynindx != -1);
13259 indx = h->elf.dynindx;
13260 unresolved_reloc = FALSE;
13262 ent = h->elf.got.glist;
13266 if (local_got_ents == NULL)
13268 ent = local_got_ents[r_symndx];
13271 for (; ent != NULL; ent = ent->next)
13272 if (ent->addend == orig_rel.r_addend
13273 && ent->owner == input_bfd
13274 && ent->tls_type == tls_type)
13280 if (ent->is_indirect)
13281 ent = ent->got.ent;
13282 offp = &ent->got.offset;
13283 got = ppc64_elf_tdata (ent->owner)->got;
13287 /* The offset must always be a multiple of 8. We use the
13288 least significant bit to record whether we have already
13289 processed this entry. */
13291 if ((off & 1) != 0)
13295 /* Generate relocs for the dynamic linker, except in
13296 the case of TLSLD where we'll use one entry per
13304 ? h->elf.type == STT_GNU_IFUNC
13305 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13307 relgot = htab->reliplt;
13308 else if ((info->shared || indx != 0)
13310 || (tls_type == (TLS_TLS | TLS_LD)
13311 && !h->elf.def_dynamic)
13312 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13313 || h->elf.root.type != bfd_link_hash_undefweak))
13314 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13315 if (relgot != NULL)
13317 outrel.r_offset = (got->output_section->vma
13318 + got->output_offset
13320 outrel.r_addend = addend;
13321 if (tls_type & (TLS_LD | TLS_GD))
13323 outrel.r_addend = 0;
13324 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13325 if (tls_type == (TLS_TLS | TLS_GD))
13327 loc = relgot->contents;
13328 loc += (relgot->reloc_count++
13329 * sizeof (Elf64_External_Rela));
13330 bfd_elf64_swap_reloca_out (output_bfd,
13332 outrel.r_offset += 8;
13333 outrel.r_addend = addend;
13335 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13338 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13339 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13340 else if (tls_type == (TLS_TLS | TLS_TPREL))
13341 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13342 else if (indx != 0)
13343 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13347 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13349 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13351 /* Write the .got section contents for the sake
13353 loc = got->contents + off;
13354 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13358 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13360 outrel.r_addend += relocation;
13361 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13362 outrel.r_addend -= htab->elf.tls_sec->vma;
13364 loc = relgot->contents;
13365 loc += (relgot->reloc_count++
13366 * sizeof (Elf64_External_Rela));
13367 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13370 /* Init the .got section contents here if we're not
13371 emitting a reloc. */
13374 relocation += addend;
13375 if (tls_type == (TLS_TLS | TLS_LD))
13377 else if (tls_type != 0)
13379 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13380 if (tls_type == (TLS_TLS | TLS_TPREL))
13381 relocation += DTP_OFFSET - TP_OFFSET;
13383 if (tls_type == (TLS_TLS | TLS_GD))
13385 bfd_put_64 (output_bfd, relocation,
13386 got->contents + off + 8);
13391 bfd_put_64 (output_bfd, relocation,
13392 got->contents + off);
13396 if (off >= (bfd_vma) -2)
13399 relocation = got->output_section->vma + got->output_offset + off;
13400 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13404 case R_PPC64_PLT16_HA:
13405 case R_PPC64_PLT16_HI:
13406 case R_PPC64_PLT16_LO:
13407 case R_PPC64_PLT32:
13408 case R_PPC64_PLT64:
13409 /* Relocation is to the entry for this symbol in the
13410 procedure linkage table. */
13412 /* Resolve a PLT reloc against a local symbol directly,
13413 without using the procedure linkage table. */
13417 /* It's possible that we didn't make a PLT entry for this
13418 symbol. This happens when statically linking PIC code,
13419 or when using -Bsymbolic. Go find a match if there is a
13421 if (htab->plt != NULL)
13423 struct plt_entry *ent;
13424 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13425 if (ent->addend == orig_rel.r_addend
13426 && ent->plt.offset != (bfd_vma) -1)
13428 relocation = (htab->plt->output_section->vma
13429 + htab->plt->output_offset
13430 + ent->plt.offset);
13431 unresolved_reloc = FALSE;
13437 /* Relocation value is TOC base. */
13438 relocation = TOCstart;
13439 if (r_symndx == STN_UNDEF)
13440 relocation += htab->stub_group[input_section->id].toc_off;
13441 else if (unresolved_reloc)
13443 else if (sec != NULL && sec->id <= htab->top_id)
13444 relocation += htab->stub_group[sec->id].toc_off;
13446 unresolved_reloc = TRUE;
13449 /* TOC16 relocs. We want the offset relative to the TOC base,
13450 which is the address of the start of the TOC plus 0x8000.
13451 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13453 case R_PPC64_TOC16:
13454 case R_PPC64_TOC16_LO:
13455 case R_PPC64_TOC16_HI:
13456 case R_PPC64_TOC16_DS:
13457 case R_PPC64_TOC16_LO_DS:
13458 case R_PPC64_TOC16_HA:
13459 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13462 /* Relocate against the beginning of the section. */
13463 case R_PPC64_SECTOFF:
13464 case R_PPC64_SECTOFF_LO:
13465 case R_PPC64_SECTOFF_HI:
13466 case R_PPC64_SECTOFF_DS:
13467 case R_PPC64_SECTOFF_LO_DS:
13468 case R_PPC64_SECTOFF_HA:
13470 addend -= sec->output_section->vma;
13473 case R_PPC64_REL16:
13474 case R_PPC64_REL16_LO:
13475 case R_PPC64_REL16_HI:
13476 case R_PPC64_REL16_HA:
13479 case R_PPC64_REL14:
13480 case R_PPC64_REL14_BRNTAKEN:
13481 case R_PPC64_REL14_BRTAKEN:
13482 case R_PPC64_REL24:
13485 case R_PPC64_TPREL16:
13486 case R_PPC64_TPREL16_LO:
13487 case R_PPC64_TPREL16_HI:
13488 case R_PPC64_TPREL16_HA:
13489 case R_PPC64_TPREL16_DS:
13490 case R_PPC64_TPREL16_LO_DS:
13491 case R_PPC64_TPREL16_HIGHER:
13492 case R_PPC64_TPREL16_HIGHERA:
13493 case R_PPC64_TPREL16_HIGHEST:
13494 case R_PPC64_TPREL16_HIGHESTA:
13496 && h->elf.root.type == bfd_link_hash_undefweak
13497 && h->elf.dynindx == -1)
13499 /* Make this relocation against an undefined weak symbol
13500 resolve to zero. This is really just a tweak, since
13501 code using weak externs ought to check that they are
13502 defined before using them. */
13503 bfd_byte *p = contents + rel->r_offset - d_offset;
13505 insn = bfd_get_32 (output_bfd, p);
13506 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13508 bfd_put_32 (output_bfd, insn, p);
13511 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13513 /* The TPREL16 relocs shouldn't really be used in shared
13514 libs as they will result in DT_TEXTREL being set, but
13515 support them anyway. */
13519 case R_PPC64_DTPREL16:
13520 case R_PPC64_DTPREL16_LO:
13521 case R_PPC64_DTPREL16_HI:
13522 case R_PPC64_DTPREL16_HA:
13523 case R_PPC64_DTPREL16_DS:
13524 case R_PPC64_DTPREL16_LO_DS:
13525 case R_PPC64_DTPREL16_HIGHER:
13526 case R_PPC64_DTPREL16_HIGHERA:
13527 case R_PPC64_DTPREL16_HIGHEST:
13528 case R_PPC64_DTPREL16_HIGHESTA:
13529 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13532 case R_PPC64_DTPMOD64:
13537 case R_PPC64_TPREL64:
13538 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13541 case R_PPC64_DTPREL64:
13542 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13545 /* Relocations that may need to be propagated if this is a
13547 case R_PPC64_REL30:
13548 case R_PPC64_REL32:
13549 case R_PPC64_REL64:
13550 case R_PPC64_ADDR14:
13551 case R_PPC64_ADDR14_BRNTAKEN:
13552 case R_PPC64_ADDR14_BRTAKEN:
13553 case R_PPC64_ADDR16:
13554 case R_PPC64_ADDR16_DS:
13555 case R_PPC64_ADDR16_HA:
13556 case R_PPC64_ADDR16_HI:
13557 case R_PPC64_ADDR16_HIGHER:
13558 case R_PPC64_ADDR16_HIGHERA:
13559 case R_PPC64_ADDR16_HIGHEST:
13560 case R_PPC64_ADDR16_HIGHESTA:
13561 case R_PPC64_ADDR16_LO:
13562 case R_PPC64_ADDR16_LO_DS:
13563 case R_PPC64_ADDR24:
13564 case R_PPC64_ADDR32:
13565 case R_PPC64_ADDR64:
13566 case R_PPC64_UADDR16:
13567 case R_PPC64_UADDR32:
13568 case R_PPC64_UADDR64:
13570 if ((input_section->flags & SEC_ALLOC) == 0)
13573 if (NO_OPD_RELOCS && is_opd)
13578 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13579 || h->elf.root.type != bfd_link_hash_undefweak)
13580 && (must_be_dyn_reloc (info, r_type)
13581 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13582 || (ELIMINATE_COPY_RELOCS
13585 && h->elf.dynindx != -1
13586 && !h->elf.non_got_ref
13587 && !h->elf.def_regular)
13590 ? h->elf.type == STT_GNU_IFUNC
13591 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13593 bfd_boolean skip, relocate;
13597 /* When generating a dynamic object, these relocations
13598 are copied into the output file to be resolved at run
13604 out_off = _bfd_elf_section_offset (output_bfd, info,
13605 input_section, rel->r_offset);
13606 if (out_off == (bfd_vma) -1)
13608 else if (out_off == (bfd_vma) -2)
13609 skip = TRUE, relocate = TRUE;
13610 out_off += (input_section->output_section->vma
13611 + input_section->output_offset);
13612 outrel.r_offset = out_off;
13613 outrel.r_addend = rel->r_addend;
13615 /* Optimize unaligned reloc use. */
13616 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13617 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13618 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13619 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13620 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13621 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13622 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13623 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13624 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13627 memset (&outrel, 0, sizeof outrel);
13628 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13630 && r_type != R_PPC64_TOC)
13632 BFD_ASSERT (h->elf.dynindx != -1);
13633 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13637 /* This symbol is local, or marked to become local,
13638 or this is an opd section reloc which must point
13639 at a local function. */
13640 outrel.r_addend += relocation;
13641 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13643 if (is_opd && h != NULL)
13645 /* Lie about opd entries. This case occurs
13646 when building shared libraries and we
13647 reference a function in another shared
13648 lib. The same thing happens for a weak
13649 definition in an application that's
13650 overridden by a strong definition in a
13651 shared lib. (I believe this is a generic
13652 bug in binutils handling of weak syms.)
13653 In these cases we won't use the opd
13654 entry in this lib. */
13655 unresolved_reloc = FALSE;
13658 && r_type == R_PPC64_ADDR64
13660 ? h->elf.type == STT_GNU_IFUNC
13661 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13662 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13665 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13667 /* We need to relocate .opd contents for ld.so.
13668 Prelink also wants simple and consistent rules
13669 for relocs. This make all RELATIVE relocs have
13670 *r_offset equal to r_addend. */
13679 ? h->elf.type == STT_GNU_IFUNC
13680 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13682 info->callbacks->einfo
13683 (_("%P: %H: %s for indirect "
13684 "function `%T' unsupported\n"),
13685 input_bfd, input_section, rel->r_offset,
13686 ppc64_elf_howto_table[r_type]->name,
13690 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13692 else if (sec == NULL || sec->owner == NULL)
13694 bfd_set_error (bfd_error_bad_value);
13701 osec = sec->output_section;
13702 indx = elf_section_data (osec)->dynindx;
13706 if ((osec->flags & SEC_READONLY) == 0
13707 && htab->elf.data_index_section != NULL)
13708 osec = htab->elf.data_index_section;
13710 osec = htab->elf.text_index_section;
13711 indx = elf_section_data (osec)->dynindx;
13713 BFD_ASSERT (indx != 0);
13715 /* We are turning this relocation into one
13716 against a section symbol, so subtract out
13717 the output section's address but not the
13718 offset of the input section in the output
13720 outrel.r_addend -= osec->vma;
13723 outrel.r_info = ELF64_R_INFO (indx, r_type);
13727 sreloc = elf_section_data (input_section)->sreloc;
13729 ? h->elf.type == STT_GNU_IFUNC
13730 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13731 sreloc = htab->reliplt;
13732 if (sreloc == NULL)
13735 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13738 loc = sreloc->contents;
13739 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13740 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13742 /* If this reloc is against an external symbol, it will
13743 be computed at runtime, so there's no need to do
13744 anything now. However, for the sake of prelink ensure
13745 that the section contents are a known value. */
13748 unresolved_reloc = FALSE;
13749 /* The value chosen here is quite arbitrary as ld.so
13750 ignores section contents except for the special
13751 case of .opd where the contents might be accessed
13752 before relocation. Choose zero, as that won't
13753 cause reloc overflow. */
13756 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13757 to improve backward compatibility with older
13759 if (r_type == R_PPC64_ADDR64)
13760 addend = outrel.r_addend;
13761 /* Adjust pc_relative relocs to have zero in *r_offset. */
13762 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13763 addend = (input_section->output_section->vma
13764 + input_section->output_offset
13771 case R_PPC64_GLOB_DAT:
13772 case R_PPC64_JMP_SLOT:
13773 case R_PPC64_JMP_IREL:
13774 case R_PPC64_RELATIVE:
13775 /* We shouldn't ever see these dynamic relocs in relocatable
13777 /* Fall through. */
13779 case R_PPC64_PLTGOT16:
13780 case R_PPC64_PLTGOT16_DS:
13781 case R_PPC64_PLTGOT16_HA:
13782 case R_PPC64_PLTGOT16_HI:
13783 case R_PPC64_PLTGOT16_LO:
13784 case R_PPC64_PLTGOT16_LO_DS:
13785 case R_PPC64_PLTREL32:
13786 case R_PPC64_PLTREL64:
13787 /* These ones haven't been implemented yet. */
13789 info->callbacks->einfo
13790 (_("%P: %B: %s is not supported for `%T'\n"),
13792 ppc64_elf_howto_table[r_type]->name, sym_name);
13794 bfd_set_error (bfd_error_invalid_operation);
13799 /* Multi-instruction sequences that access the TOC can be
13800 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13801 to nop; addi rb,r2,x; */
13807 case R_PPC64_GOT_TLSLD16_HI:
13808 case R_PPC64_GOT_TLSGD16_HI:
13809 case R_PPC64_GOT_TPREL16_HI:
13810 case R_PPC64_GOT_DTPREL16_HI:
13811 case R_PPC64_GOT16_HI:
13812 case R_PPC64_TOC16_HI:
13813 /* These relocs would only be useful if building up an
13814 offset to later add to r2, perhaps in an indexed
13815 addressing mode instruction. Don't try to optimize.
13816 Unfortunately, the possibility of someone building up an
13817 offset like this or even with the HA relocs, means that
13818 we need to check the high insn when optimizing the low
13822 case R_PPC64_GOT_TLSLD16_HA:
13823 case R_PPC64_GOT_TLSGD16_HA:
13824 case R_PPC64_GOT_TPREL16_HA:
13825 case R_PPC64_GOT_DTPREL16_HA:
13826 case R_PPC64_GOT16_HA:
13827 case R_PPC64_TOC16_HA:
13828 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13829 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13831 bfd_byte *p = contents + (rel->r_offset & ~3);
13832 bfd_put_32 (input_bfd, NOP, p);
13836 case R_PPC64_GOT_TLSLD16_LO:
13837 case R_PPC64_GOT_TLSGD16_LO:
13838 case R_PPC64_GOT_TPREL16_LO_DS:
13839 case R_PPC64_GOT_DTPREL16_LO_DS:
13840 case R_PPC64_GOT16_LO:
13841 case R_PPC64_GOT16_LO_DS:
13842 case R_PPC64_TOC16_LO:
13843 case R_PPC64_TOC16_LO_DS:
13844 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13845 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13847 bfd_byte *p = contents + (rel->r_offset & ~3);
13848 insn = bfd_get_32 (input_bfd, p);
13849 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13851 /* Transform addic to addi when we change reg. */
13852 insn &= ~((0x3f << 26) | (0x1f << 16));
13853 insn |= (14u << 26) | (2 << 16);
13857 insn &= ~(0x1f << 16);
13860 bfd_put_32 (input_bfd, insn, p);
13865 /* Do any further special processing. */
13871 case R_PPC64_ADDR16_HA:
13872 case R_PPC64_REL16_HA:
13873 case R_PPC64_ADDR16_HIGHERA:
13874 case R_PPC64_ADDR16_HIGHESTA:
13875 case R_PPC64_TOC16_HA:
13876 case R_PPC64_SECTOFF_HA:
13877 case R_PPC64_TPREL16_HA:
13878 case R_PPC64_DTPREL16_HA:
13879 case R_PPC64_TPREL16_HIGHER:
13880 case R_PPC64_TPREL16_HIGHERA:
13881 case R_PPC64_TPREL16_HIGHEST:
13882 case R_PPC64_TPREL16_HIGHESTA:
13883 case R_PPC64_DTPREL16_HIGHER:
13884 case R_PPC64_DTPREL16_HIGHERA:
13885 case R_PPC64_DTPREL16_HIGHEST:
13886 case R_PPC64_DTPREL16_HIGHESTA:
13887 /* It's just possible that this symbol is a weak symbol
13888 that's not actually defined anywhere. In that case,
13889 'sec' would be NULL, and we should leave the symbol
13890 alone (it will be set to zero elsewhere in the link). */
13895 case R_PPC64_GOT16_HA:
13896 case R_PPC64_PLTGOT16_HA:
13897 case R_PPC64_PLT16_HA:
13898 case R_PPC64_GOT_TLSGD16_HA:
13899 case R_PPC64_GOT_TLSLD16_HA:
13900 case R_PPC64_GOT_TPREL16_HA:
13901 case R_PPC64_GOT_DTPREL16_HA:
13902 /* Add 0x10000 if sign bit in 0:15 is set.
13903 Bits 0:15 are not used. */
13907 case R_PPC64_ADDR16_DS:
13908 case R_PPC64_ADDR16_LO_DS:
13909 case R_PPC64_GOT16_DS:
13910 case R_PPC64_GOT16_LO_DS:
13911 case R_PPC64_PLT16_LO_DS:
13912 case R_PPC64_SECTOFF_DS:
13913 case R_PPC64_SECTOFF_LO_DS:
13914 case R_PPC64_TOC16_DS:
13915 case R_PPC64_TOC16_LO_DS:
13916 case R_PPC64_PLTGOT16_DS:
13917 case R_PPC64_PLTGOT16_LO_DS:
13918 case R_PPC64_GOT_TPREL16_DS:
13919 case R_PPC64_GOT_TPREL16_LO_DS:
13920 case R_PPC64_GOT_DTPREL16_DS:
13921 case R_PPC64_GOT_DTPREL16_LO_DS:
13922 case R_PPC64_TPREL16_DS:
13923 case R_PPC64_TPREL16_LO_DS:
13924 case R_PPC64_DTPREL16_DS:
13925 case R_PPC64_DTPREL16_LO_DS:
13926 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13928 /* If this reloc is against an lq insn, then the value must be
13929 a multiple of 16. This is somewhat of a hack, but the
13930 "correct" way to do this by defining _DQ forms of all the
13931 _DS relocs bloats all reloc switches in this file. It
13932 doesn't seem to make much sense to use any of these relocs
13933 in data, so testing the insn should be safe. */
13934 if ((insn & (0x3f << 26)) == (56u << 26))
13936 if (((relocation + addend) & mask) != 0)
13938 info->callbacks->einfo
13939 (_("%P: %H: error: %s not a multiple of %u\n"),
13940 input_bfd, input_section, rel->r_offset,
13941 ppc64_elf_howto_table[r_type]->name,
13943 bfd_set_error (bfd_error_bad_value);
13950 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13951 because such sections are not SEC_ALLOC and thus ld.so will
13952 not process them. */
13953 if (unresolved_reloc
13954 && !((input_section->flags & SEC_DEBUGGING) != 0
13955 && h->elf.def_dynamic)
13956 && _bfd_elf_section_offset (output_bfd, info, input_section,
13957 rel->r_offset) != (bfd_vma) -1)
13959 info->callbacks->einfo
13960 (_("%P: %H: unresolvable %s against `%T'\n"),
13961 input_bfd, input_section, rel->r_offset,
13962 ppc64_elf_howto_table[(int) r_type]->name,
13963 h->elf.root.root.string);
13967 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13975 if (r != bfd_reloc_ok)
13977 char *more_info = NULL;
13978 const char *reloc_name = ppc64_elf_howto_table[r_type]->name;
13980 if (reloc_dest != DEST_NORMAL)
13982 more_info = bfd_malloc (strlen (reloc_name) + 8);
13983 if (more_info != NULL)
13985 strcpy (more_info, reloc_name);
13986 strcat (more_info, (reloc_dest == DEST_OPD
13987 ? " (OPD)" : " (stub)"));
13988 reloc_name = more_info;
13992 if (r == bfd_reloc_overflow)
13997 && h->elf.root.type == bfd_link_hash_undefweak
13998 && ppc64_elf_howto_table[r_type]->pc_relative)
14000 /* Assume this is a call protected by other code that
14001 detects the symbol is undefined. If this is the case,
14002 we can safely ignore the overflow. If not, the
14003 program is hosed anyway, and a little warning isn't
14009 if (!((*info->callbacks->reloc_overflow)
14010 (info, &h->elf.root, sym_name,
14011 reloc_name, orig_rel.r_addend,
14012 input_bfd, input_section, rel->r_offset)))
14017 info->callbacks->einfo
14018 (_("%P: %H: %s against `%T': error %d\n"),
14019 input_bfd, input_section, rel->r_offset,
14020 reloc_name, sym_name, (int) r);
14023 if (more_info != NULL)
14028 /* If we're emitting relocations, then shortly after this function
14029 returns, reloc offsets and addends for this section will be
14030 adjusted. Worse, reloc symbol indices will be for the output
14031 file rather than the input. Save a copy of the relocs for
14032 opd_entry_value. */
14033 if (is_opd && (info->emitrelocations || info->relocatable))
14036 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14037 rel = bfd_alloc (input_bfd, amt);
14038 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
14039 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
14042 memcpy (rel, relocs, amt);
14047 /* Adjust the value of any local symbols in opd sections. */
14050 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14051 const char *name ATTRIBUTE_UNUSED,
14052 Elf_Internal_Sym *elfsym,
14053 asection *input_sec,
14054 struct elf_link_hash_entry *h)
14056 struct _opd_sec_data *opd;
14063 opd = get_opd_info (input_sec);
14064 if (opd == NULL || opd->adjust == NULL)
14067 value = elfsym->st_value - input_sec->output_offset;
14068 if (!info->relocatable)
14069 value -= input_sec->output_section->vma;
14071 adjust = opd->adjust[value / 8];
14075 elfsym->st_value += adjust;
14079 /* Finish up dynamic symbol handling. We set the contents of various
14080 dynamic sections here. */
14083 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14084 struct bfd_link_info *info,
14085 struct elf_link_hash_entry *h,
14086 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14088 struct ppc_link_hash_table *htab;
14089 struct plt_entry *ent;
14090 Elf_Internal_Rela rela;
14093 htab = ppc_hash_table (info);
14097 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14098 if (ent->plt.offset != (bfd_vma) -1)
14100 /* This symbol has an entry in the procedure linkage
14101 table. Set it up. */
14102 if (!htab->elf.dynamic_sections_created
14103 || h->dynindx == -1)
14105 BFD_ASSERT (h->type == STT_GNU_IFUNC
14107 && (h->root.type == bfd_link_hash_defined
14108 || h->root.type == bfd_link_hash_defweak));
14109 rela.r_offset = (htab->iplt->output_section->vma
14110 + htab->iplt->output_offset
14111 + ent->plt.offset);
14112 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14113 rela.r_addend = (h->root.u.def.value
14114 + h->root.u.def.section->output_offset
14115 + h->root.u.def.section->output_section->vma
14117 loc = (htab->reliplt->contents
14118 + (htab->reliplt->reloc_count++
14119 * sizeof (Elf64_External_Rela)));
14123 rela.r_offset = (htab->plt->output_section->vma
14124 + htab->plt->output_offset
14125 + ent->plt.offset);
14126 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14127 rela.r_addend = ent->addend;
14128 loc = (htab->relplt->contents
14129 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
14130 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
14132 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14137 /* This symbol needs a copy reloc. Set it up. */
14139 if (h->dynindx == -1
14140 || (h->root.type != bfd_link_hash_defined
14141 && h->root.type != bfd_link_hash_defweak)
14142 || htab->relbss == NULL)
14145 rela.r_offset = (h->root.u.def.value
14146 + h->root.u.def.section->output_section->vma
14147 + h->root.u.def.section->output_offset);
14148 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14150 loc = htab->relbss->contents;
14151 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14152 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14158 /* Used to decide how to sort relocs in an optimal manner for the
14159 dynamic linker, before writing them out. */
14161 static enum elf_reloc_type_class
14162 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14163 const asection *rel_sec,
14164 const Elf_Internal_Rela *rela)
14166 enum elf_ppc64_reloc_type r_type;
14167 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14169 if (rel_sec == htab->reliplt)
14170 return reloc_class_ifunc;
14172 r_type = ELF64_R_TYPE (rela->r_info);
14175 case R_PPC64_RELATIVE:
14176 return reloc_class_relative;
14177 case R_PPC64_JMP_SLOT:
14178 return reloc_class_plt;
14180 return reloc_class_copy;
14182 return reloc_class_normal;
14186 /* Finish up the dynamic sections. */
14189 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14190 struct bfd_link_info *info)
14192 struct ppc_link_hash_table *htab;
14196 htab = ppc_hash_table (info);
14200 dynobj = htab->elf.dynobj;
14201 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14203 if (htab->elf.dynamic_sections_created)
14205 Elf64_External_Dyn *dyncon, *dynconend;
14207 if (sdyn == NULL || htab->got == NULL)
14210 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14211 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14212 for (; dyncon < dynconend; dyncon++)
14214 Elf_Internal_Dyn dyn;
14217 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14224 case DT_PPC64_GLINK:
14226 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14227 /* We stupidly defined DT_PPC64_GLINK to be the start
14228 of glink rather than the first entry point, which is
14229 what ld.so needs, and now have a bigger stub to
14230 support automatic multiple TOCs. */
14231 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
14235 s = bfd_get_section_by_name (output_bfd, ".opd");
14238 dyn.d_un.d_ptr = s->vma;
14241 case DT_PPC64_OPDSZ:
14242 s = bfd_get_section_by_name (output_bfd, ".opd");
14245 dyn.d_un.d_val = s->size;
14250 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14255 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14259 dyn.d_un.d_val = htab->relplt->size;
14263 /* Don't count procedure linkage table relocs in the
14264 overall reloc count. */
14268 dyn.d_un.d_val -= s->size;
14272 /* We may not be using the standard ELF linker script.
14273 If .rela.plt is the first .rela section, we adjust
14274 DT_RELA to not include it. */
14278 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14280 dyn.d_un.d_ptr += s->size;
14284 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14288 if (htab->got != NULL && htab->got->size != 0)
14290 /* Fill in the first entry in the global offset table.
14291 We use it to hold the link-time TOCbase. */
14292 bfd_put_64 (output_bfd,
14293 elf_gp (output_bfd) + TOC_BASE_OFF,
14294 htab->got->contents);
14296 /* Set .got entry size. */
14297 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14300 if (htab->plt != NULL && htab->plt->size != 0)
14302 /* Set .plt entry size. */
14303 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14307 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14308 brlt ourselves if emitrelocations. */
14309 if (htab->brlt != NULL
14310 && htab->brlt->reloc_count != 0
14311 && !_bfd_elf_link_output_relocs (output_bfd,
14313 elf_section_data (htab->brlt)->rela.hdr,
14314 elf_section_data (htab->brlt)->relocs,
14318 if (htab->glink != NULL
14319 && htab->glink->reloc_count != 0
14320 && !_bfd_elf_link_output_relocs (output_bfd,
14322 elf_section_data (htab->glink)->rela.hdr,
14323 elf_section_data (htab->glink)->relocs,
14328 if (htab->glink_eh_frame != NULL
14329 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
14330 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14331 htab->glink_eh_frame,
14332 htab->glink_eh_frame->contents))
14335 /* We need to handle writing out multiple GOT sections ourselves,
14336 since we didn't add them to DYNOBJ. We know dynobj is the first
14338 while ((dynobj = dynobj->link_next) != NULL)
14342 if (!is_ppc64_elf (dynobj))
14345 s = ppc64_elf_tdata (dynobj)->got;
14348 && s->output_section != bfd_abs_section_ptr
14349 && !bfd_set_section_contents (output_bfd, s->output_section,
14350 s->contents, s->output_offset,
14353 s = ppc64_elf_tdata (dynobj)->relgot;
14356 && s->output_section != bfd_abs_section_ptr
14357 && !bfd_set_section_contents (output_bfd, s->output_section,
14358 s->contents, s->output_offset,
14366 #include "elf64-target.h"
14368 /* FreeBSD support */
14370 #undef TARGET_LITTLE_SYM
14371 #undef TARGET_LITTLE_NAME
14373 #undef TARGET_BIG_SYM
14374 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14375 #undef TARGET_BIG_NAME
14376 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14379 #define ELF_OSABI ELFOSABI_FREEBSD
14382 #define elf64_bed elf64_powerpc_fbsd_bed
14384 #include "elf64-target.h"