1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
8 This file is part of BFD, the Binary File Descriptor library.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
60 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61 #define TARGET_LITTLE_NAME "elf64-powerpcle"
62 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63 #define TARGET_BIG_NAME "elf64-powerpc"
64 #define ELF_ARCH bfd_arch_powerpc
65 #define ELF_TARGET_ID PPC64_ELF_DATA
66 #define ELF_MACHINE_CODE EM_PPC64
67 #define ELF_MAXPAGESIZE 0x10000
68 #define ELF_COMMONPAGESIZE 0x1000
69 #define elf_info_to_howto ppc64_elf_info_to_howto
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_default_execstack 0
81 #define bfd_elf64_mkobject ppc64_elf_mkobject
82 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
89 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91 #define elf_backend_object_p ppc64_elf_object_p
92 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
93 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
94 #define elf_backend_write_core_note ppc64_elf_write_core_note
95 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
96 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
97 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
98 #define elf_backend_check_directives ppc64_elf_process_dot_syms
99 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
100 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
101 #define elf_backend_check_relocs ppc64_elf_check_relocs
102 #define elf_backend_gc_keep ppc64_elf_gc_keep
103 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
104 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
105 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
106 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
107 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
108 #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
109 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
110 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_post_process_headers _bfd_elf_set_osabi
121 /* The name of the dynamic interpreter. This is put in the .interp
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE 24
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
131 /* TOC base pointers offset from start of TOC. */
132 #define TOC_BASE_OFF 0x8000
134 /* Offset of tp and dtp pointers from start of TLS block. */
135 #define TP_OFFSET 0x7000
136 #define DTP_OFFSET 0x8000
138 /* .plt call stub instructions. The normal stub is like this, but
139 sometimes the .plt entry crosses a 64k boundary and we need to
140 insert an addi to adjust r12. */
141 #define PLT_CALL_STUB_SIZE (7*4)
142 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
143 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
144 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
145 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
146 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
147 /* ld %r11,xxx+16@l(%r12) */
148 #define BCTR 0x4e800420 /* bctr */
151 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
152 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
153 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
154 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
156 #define XOR_R11_R11_R11 0x7d6b5a78 /* xor %r11,%r11,%r11 */
157 #define ADD_R12_R12_R11 0x7d8c5a14 /* add %r12,%r12,%r11 */
158 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
159 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
160 #define BNECTR 0x4ca20420 /* bnectr+ */
161 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
163 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
164 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
166 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
168 /* glink call stub instructions. We enter with the index in R0. */
169 #define GLINK_CALL_STUB_SIZE (16*4)
173 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
174 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
176 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
177 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
178 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
179 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
187 #define NOP 0x60000000
189 /* Some other nops. */
190 #define CROR_151515 0x4def7b82
191 #define CROR_313131 0x4ffffb82
193 /* .glink entries for the first 32k functions are two instructions. */
194 #define LI_R0_0 0x38000000 /* li %r0,0 */
195 #define B_DOT 0x48000000 /* b . */
197 /* After that, we need two instructions to load the index, followed by
199 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
200 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
202 /* Instructions used by the save and restore reg functions. */
203 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
204 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
205 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
206 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
207 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
208 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
209 #define LI_R12_0 0x39800000 /* li %r12,0 */
210 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
211 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
212 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
213 #define BLR 0x4e800020 /* blr */
215 /* Since .opd is an array of descriptors and each entry will end up
216 with identical R_PPC64_RELATIVE relocs, there is really no need to
217 propagate .opd relocs; The dynamic linker should be taught to
218 relocate .opd without reloc entries. */
219 #ifndef NO_OPD_RELOCS
220 #define NO_OPD_RELOCS 0
223 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
225 /* Relocation HOWTO's. */
226 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
228 static reloc_howto_type ppc64_elf_howto_raw[] = {
229 /* This reloc does nothing. */
230 HOWTO (R_PPC64_NONE, /* type */
232 2, /* size (0 = byte, 1 = short, 2 = long) */
234 FALSE, /* pc_relative */
236 complain_overflow_dont, /* complain_on_overflow */
237 bfd_elf_generic_reloc, /* special_function */
238 "R_PPC64_NONE", /* name */
239 FALSE, /* partial_inplace */
242 FALSE), /* pcrel_offset */
244 /* A standard 32 bit relocation. */
245 HOWTO (R_PPC64_ADDR32, /* type */
247 2, /* size (0 = byte, 1 = short, 2 = long) */
249 FALSE, /* pc_relative */
251 complain_overflow_bitfield, /* complain_on_overflow */
252 bfd_elf_generic_reloc, /* special_function */
253 "R_PPC64_ADDR32", /* name */
254 FALSE, /* partial_inplace */
256 0xffffffff, /* dst_mask */
257 FALSE), /* pcrel_offset */
259 /* An absolute 26 bit branch; the lower two bits must be zero.
260 FIXME: we don't check that, we just clear them. */
261 HOWTO (R_PPC64_ADDR24, /* type */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
265 FALSE, /* pc_relative */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_PPC64_ADDR24", /* name */
270 FALSE, /* partial_inplace */
272 0x03fffffc, /* dst_mask */
273 FALSE), /* pcrel_offset */
275 /* A standard 16 bit relocation. */
276 HOWTO (R_PPC64_ADDR16, /* type */
278 1, /* size (0 = byte, 1 = short, 2 = long) */
280 FALSE, /* pc_relative */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_PPC64_ADDR16", /* name */
285 FALSE, /* partial_inplace */
287 0xffff, /* dst_mask */
288 FALSE), /* pcrel_offset */
290 /* A 16 bit relocation without overflow. */
291 HOWTO (R_PPC64_ADDR16_LO, /* type */
293 1, /* size (0 = byte, 1 = short, 2 = long) */
295 FALSE, /* pc_relative */
297 complain_overflow_dont,/* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_PPC64_ADDR16_LO", /* name */
300 FALSE, /* partial_inplace */
302 0xffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
305 /* Bits 16-31 of an address. */
306 HOWTO (R_PPC64_ADDR16_HI, /* type */
308 1, /* size (0 = byte, 1 = short, 2 = long) */
310 FALSE, /* pc_relative */
312 complain_overflow_dont, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_PPC64_ADDR16_HI", /* name */
315 FALSE, /* partial_inplace */
317 0xffff, /* dst_mask */
318 FALSE), /* pcrel_offset */
320 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
321 bits, treated as a signed number, is negative. */
322 HOWTO (R_PPC64_ADDR16_HA, /* type */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
326 FALSE, /* pc_relative */
328 complain_overflow_dont, /* complain_on_overflow */
329 ppc64_elf_ha_reloc, /* special_function */
330 "R_PPC64_ADDR16_HA", /* name */
331 FALSE, /* partial_inplace */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
336 /* An absolute 16 bit branch; the lower two bits must be zero.
337 FIXME: we don't check that, we just clear them. */
338 HOWTO (R_PPC64_ADDR14, /* type */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
342 FALSE, /* pc_relative */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 ppc64_elf_branch_reloc, /* special_function */
346 "R_PPC64_ADDR14", /* name */
347 FALSE, /* partial_inplace */
349 0x0000fffc, /* dst_mask */
350 FALSE), /* pcrel_offset */
352 /* An absolute 16 bit branch, for which bit 10 should be set to
353 indicate that the branch is expected to be taken. The lower two
354 bits must be zero. */
355 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
357 2, /* size (0 = byte, 1 = short, 2 = long) */
359 FALSE, /* pc_relative */
361 complain_overflow_bitfield, /* complain_on_overflow */
362 ppc64_elf_brtaken_reloc, /* special_function */
363 "R_PPC64_ADDR14_BRTAKEN",/* name */
364 FALSE, /* partial_inplace */
366 0x0000fffc, /* dst_mask */
367 FALSE), /* pcrel_offset */
369 /* An absolute 16 bit branch, for which bit 10 should be set to
370 indicate that the branch is not expected to be taken. The lower
371 two bits must be zero. */
372 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
376 FALSE, /* pc_relative */
378 complain_overflow_bitfield, /* complain_on_overflow */
379 ppc64_elf_brtaken_reloc, /* special_function */
380 "R_PPC64_ADDR14_BRNTAKEN",/* name */
381 FALSE, /* partial_inplace */
383 0x0000fffc, /* dst_mask */
384 FALSE), /* pcrel_offset */
386 /* A relative 26 bit branch; the lower two bits must be zero. */
387 HOWTO (R_PPC64_REL24, /* type */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
391 TRUE, /* pc_relative */
393 complain_overflow_signed, /* complain_on_overflow */
394 ppc64_elf_branch_reloc, /* special_function */
395 "R_PPC64_REL24", /* name */
396 FALSE, /* partial_inplace */
398 0x03fffffc, /* dst_mask */
399 TRUE), /* pcrel_offset */
401 /* A relative 16 bit branch; the lower two bits must be zero. */
402 HOWTO (R_PPC64_REL14, /* type */
404 2, /* size (0 = byte, 1 = short, 2 = long) */
406 TRUE, /* pc_relative */
408 complain_overflow_signed, /* complain_on_overflow */
409 ppc64_elf_branch_reloc, /* special_function */
410 "R_PPC64_REL14", /* name */
411 FALSE, /* partial_inplace */
413 0x0000fffc, /* dst_mask */
414 TRUE), /* pcrel_offset */
416 /* A relative 16 bit branch. Bit 10 should be set to indicate that
417 the branch is expected to be taken. The lower two bits must be
419 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
423 TRUE, /* pc_relative */
425 complain_overflow_signed, /* complain_on_overflow */
426 ppc64_elf_brtaken_reloc, /* special_function */
427 "R_PPC64_REL14_BRTAKEN", /* name */
428 FALSE, /* partial_inplace */
430 0x0000fffc, /* dst_mask */
431 TRUE), /* pcrel_offset */
433 /* A relative 16 bit branch. Bit 10 should be set to indicate that
434 the branch is not expected to be taken. The lower two bits must
436 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 TRUE, /* pc_relative */
442 complain_overflow_signed, /* complain_on_overflow */
443 ppc64_elf_brtaken_reloc, /* special_function */
444 "R_PPC64_REL14_BRNTAKEN",/* name */
445 FALSE, /* partial_inplace */
447 0x0000fffc, /* dst_mask */
448 TRUE), /* pcrel_offset */
450 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
452 HOWTO (R_PPC64_GOT16, /* type */
454 1, /* size (0 = byte, 1 = short, 2 = long) */
456 FALSE, /* pc_relative */
458 complain_overflow_signed, /* complain_on_overflow */
459 ppc64_elf_unhandled_reloc, /* special_function */
460 "R_PPC64_GOT16", /* name */
461 FALSE, /* partial_inplace */
463 0xffff, /* dst_mask */
464 FALSE), /* pcrel_offset */
466 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
468 HOWTO (R_PPC64_GOT16_LO, /* type */
470 1, /* size (0 = byte, 1 = short, 2 = long) */
472 FALSE, /* pc_relative */
474 complain_overflow_dont, /* complain_on_overflow */
475 ppc64_elf_unhandled_reloc, /* special_function */
476 "R_PPC64_GOT16_LO", /* name */
477 FALSE, /* partial_inplace */
479 0xffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
482 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
484 HOWTO (R_PPC64_GOT16_HI, /* type */
486 1, /* size (0 = byte, 1 = short, 2 = long) */
488 FALSE, /* pc_relative */
490 complain_overflow_dont,/* complain_on_overflow */
491 ppc64_elf_unhandled_reloc, /* special_function */
492 "R_PPC64_GOT16_HI", /* name */
493 FALSE, /* partial_inplace */
495 0xffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
498 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
500 HOWTO (R_PPC64_GOT16_HA, /* type */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
504 FALSE, /* pc_relative */
506 complain_overflow_dont,/* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16_HA", /* name */
509 FALSE, /* partial_inplace */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
514 /* This is used only by the dynamic linker. The symbol should exist
515 both in the object being run and in some shared library. The
516 dynamic linker copies the data addressed by the symbol from the
517 shared library into the object, because the object being
518 run has to have the data at some particular address. */
519 HOWTO (R_PPC64_COPY, /* type */
521 0, /* this one is variable size */
523 FALSE, /* pc_relative */
525 complain_overflow_dont, /* complain_on_overflow */
526 ppc64_elf_unhandled_reloc, /* special_function */
527 "R_PPC64_COPY", /* name */
528 FALSE, /* partial_inplace */
531 FALSE), /* pcrel_offset */
533 /* Like R_PPC64_ADDR64, but used when setting global offset table
535 HOWTO (R_PPC64_GLOB_DAT, /* type */
537 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
539 FALSE, /* pc_relative */
541 complain_overflow_dont, /* complain_on_overflow */
542 ppc64_elf_unhandled_reloc, /* special_function */
543 "R_PPC64_GLOB_DAT", /* name */
544 FALSE, /* partial_inplace */
546 ONES (64), /* dst_mask */
547 FALSE), /* pcrel_offset */
549 /* Created by the link editor. Marks a procedure linkage table
550 entry for a symbol. */
551 HOWTO (R_PPC64_JMP_SLOT, /* type */
553 0, /* size (0 = byte, 1 = short, 2 = long) */
555 FALSE, /* pc_relative */
557 complain_overflow_dont, /* complain_on_overflow */
558 ppc64_elf_unhandled_reloc, /* special_function */
559 "R_PPC64_JMP_SLOT", /* name */
560 FALSE, /* partial_inplace */
563 FALSE), /* pcrel_offset */
565 /* Used only by the dynamic linker. When the object is run, this
566 doubleword64 is set to the load address of the object, plus the
568 HOWTO (R_PPC64_RELATIVE, /* type */
570 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
572 FALSE, /* pc_relative */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_PPC64_RELATIVE", /* name */
577 FALSE, /* partial_inplace */
579 ONES (64), /* dst_mask */
580 FALSE), /* pcrel_offset */
582 /* Like R_PPC64_ADDR32, but may be unaligned. */
583 HOWTO (R_PPC64_UADDR32, /* type */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
587 FALSE, /* pc_relative */
589 complain_overflow_bitfield, /* complain_on_overflow */
590 bfd_elf_generic_reloc, /* special_function */
591 "R_PPC64_UADDR32", /* name */
592 FALSE, /* partial_inplace */
594 0xffffffff, /* dst_mask */
595 FALSE), /* pcrel_offset */
597 /* Like R_PPC64_ADDR16, but may be unaligned. */
598 HOWTO (R_PPC64_UADDR16, /* type */
600 1, /* size (0 = byte, 1 = short, 2 = long) */
602 FALSE, /* pc_relative */
604 complain_overflow_bitfield, /* complain_on_overflow */
605 bfd_elf_generic_reloc, /* special_function */
606 "R_PPC64_UADDR16", /* name */
607 FALSE, /* partial_inplace */
609 0xffff, /* dst_mask */
610 FALSE), /* pcrel_offset */
612 /* 32-bit PC relative. */
613 HOWTO (R_PPC64_REL32, /* type */
615 2, /* size (0 = byte, 1 = short, 2 = long) */
617 TRUE, /* pc_relative */
619 /* FIXME: Verify. Was complain_overflow_bitfield. */
620 complain_overflow_signed, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 "R_PPC64_REL32", /* name */
623 FALSE, /* partial_inplace */
625 0xffffffff, /* dst_mask */
626 TRUE), /* pcrel_offset */
628 /* 32-bit relocation to the symbol's procedure linkage table. */
629 HOWTO (R_PPC64_PLT32, /* type */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
633 FALSE, /* pc_relative */
635 complain_overflow_bitfield, /* complain_on_overflow */
636 ppc64_elf_unhandled_reloc, /* special_function */
637 "R_PPC64_PLT32", /* name */
638 FALSE, /* partial_inplace */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
643 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
644 FIXME: R_PPC64_PLTREL32 not supported. */
645 HOWTO (R_PPC64_PLTREL32, /* type */
647 2, /* size (0 = byte, 1 = short, 2 = long) */
649 TRUE, /* pc_relative */
651 complain_overflow_signed, /* complain_on_overflow */
652 bfd_elf_generic_reloc, /* special_function */
653 "R_PPC64_PLTREL32", /* name */
654 FALSE, /* partial_inplace */
656 0xffffffff, /* dst_mask */
657 TRUE), /* pcrel_offset */
659 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
661 HOWTO (R_PPC64_PLT16_LO, /* type */
663 1, /* size (0 = byte, 1 = short, 2 = long) */
665 FALSE, /* pc_relative */
667 complain_overflow_dont, /* complain_on_overflow */
668 ppc64_elf_unhandled_reloc, /* special_function */
669 "R_PPC64_PLT16_LO", /* name */
670 FALSE, /* partial_inplace */
672 0xffff, /* dst_mask */
673 FALSE), /* pcrel_offset */
675 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
677 HOWTO (R_PPC64_PLT16_HI, /* type */
679 1, /* size (0 = byte, 1 = short, 2 = long) */
681 FALSE, /* pc_relative */
683 complain_overflow_dont, /* complain_on_overflow */
684 ppc64_elf_unhandled_reloc, /* special_function */
685 "R_PPC64_PLT16_HI", /* name */
686 FALSE, /* partial_inplace */
688 0xffff, /* dst_mask */
689 FALSE), /* pcrel_offset */
691 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
693 HOWTO (R_PPC64_PLT16_HA, /* type */
695 1, /* size (0 = byte, 1 = short, 2 = long) */
697 FALSE, /* pc_relative */
699 complain_overflow_dont, /* complain_on_overflow */
700 ppc64_elf_unhandled_reloc, /* special_function */
701 "R_PPC64_PLT16_HA", /* name */
702 FALSE, /* partial_inplace */
704 0xffff, /* dst_mask */
705 FALSE), /* pcrel_offset */
707 /* 16-bit section relative relocation. */
708 HOWTO (R_PPC64_SECTOFF, /* type */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
712 FALSE, /* pc_relative */
714 complain_overflow_bitfield, /* complain_on_overflow */
715 ppc64_elf_sectoff_reloc, /* special_function */
716 "R_PPC64_SECTOFF", /* name */
717 FALSE, /* partial_inplace */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
722 /* Like R_PPC64_SECTOFF, but no overflow warning. */
723 HOWTO (R_PPC64_SECTOFF_LO, /* type */
725 1, /* size (0 = byte, 1 = short, 2 = long) */
727 FALSE, /* pc_relative */
729 complain_overflow_dont, /* complain_on_overflow */
730 ppc64_elf_sectoff_reloc, /* special_function */
731 "R_PPC64_SECTOFF_LO", /* name */
732 FALSE, /* partial_inplace */
734 0xffff, /* dst_mask */
735 FALSE), /* pcrel_offset */
737 /* 16-bit upper half section relative relocation. */
738 HOWTO (R_PPC64_SECTOFF_HI, /* type */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
742 FALSE, /* pc_relative */
744 complain_overflow_dont, /* complain_on_overflow */
745 ppc64_elf_sectoff_reloc, /* special_function */
746 "R_PPC64_SECTOFF_HI", /* name */
747 FALSE, /* partial_inplace */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
752 /* 16-bit upper half adjusted section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF_HA, /* type */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
757 FALSE, /* pc_relative */
759 complain_overflow_dont, /* complain_on_overflow */
760 ppc64_elf_sectoff_ha_reloc, /* special_function */
761 "R_PPC64_SECTOFF_HA", /* name */
762 FALSE, /* partial_inplace */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
767 /* Like R_PPC64_REL24 without touching the two least significant bits. */
768 HOWTO (R_PPC64_REL30, /* type */
770 2, /* size (0 = byte, 1 = short, 2 = long) */
772 TRUE, /* pc_relative */
774 complain_overflow_dont, /* complain_on_overflow */
775 bfd_elf_generic_reloc, /* special_function */
776 "R_PPC64_REL30", /* name */
777 FALSE, /* partial_inplace */
779 0xfffffffc, /* dst_mask */
780 TRUE), /* pcrel_offset */
782 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
784 /* A standard 64-bit relocation. */
785 HOWTO (R_PPC64_ADDR64, /* type */
787 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
789 FALSE, /* pc_relative */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC64_ADDR64", /* name */
794 FALSE, /* partial_inplace */
796 ONES (64), /* dst_mask */
797 FALSE), /* pcrel_offset */
799 /* The bits 32-47 of an address. */
800 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
802 1, /* size (0 = byte, 1 = short, 2 = long) */
804 FALSE, /* pc_relative */
806 complain_overflow_dont, /* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_PPC64_ADDR16_HIGHER", /* name */
809 FALSE, /* partial_inplace */
811 0xffff, /* dst_mask */
812 FALSE), /* pcrel_offset */
814 /* The bits 32-47 of an address, plus 1 if the contents of the low
815 16 bits, treated as a signed number, is negative. */
816 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
820 FALSE, /* pc_relative */
822 complain_overflow_dont, /* complain_on_overflow */
823 ppc64_elf_ha_reloc, /* special_function */
824 "R_PPC64_ADDR16_HIGHERA", /* name */
825 FALSE, /* partial_inplace */
827 0xffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
830 /* The bits 48-63 of an address. */
831 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
835 FALSE, /* pc_relative */
837 complain_overflow_dont, /* complain_on_overflow */
838 bfd_elf_generic_reloc, /* special_function */
839 "R_PPC64_ADDR16_HIGHEST", /* name */
840 FALSE, /* partial_inplace */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
845 /* The bits 48-63 of an address, plus 1 if the contents of the low
846 16 bits, treated as a signed number, is negative. */
847 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
851 FALSE, /* pc_relative */
853 complain_overflow_dont, /* complain_on_overflow */
854 ppc64_elf_ha_reloc, /* special_function */
855 "R_PPC64_ADDR16_HIGHESTA", /* name */
856 FALSE, /* partial_inplace */
858 0xffff, /* dst_mask */
859 FALSE), /* pcrel_offset */
861 /* Like ADDR64, but may be unaligned. */
862 HOWTO (R_PPC64_UADDR64, /* type */
864 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
866 FALSE, /* pc_relative */
868 complain_overflow_dont, /* complain_on_overflow */
869 bfd_elf_generic_reloc, /* special_function */
870 "R_PPC64_UADDR64", /* name */
871 FALSE, /* partial_inplace */
873 ONES (64), /* dst_mask */
874 FALSE), /* pcrel_offset */
876 /* 64-bit relative relocation. */
877 HOWTO (R_PPC64_REL64, /* type */
879 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
881 TRUE, /* pc_relative */
883 complain_overflow_dont, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC64_REL64", /* name */
886 FALSE, /* partial_inplace */
888 ONES (64), /* dst_mask */
889 TRUE), /* pcrel_offset */
891 /* 64-bit relocation to the symbol's procedure linkage table. */
892 HOWTO (R_PPC64_PLT64, /* type */
894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
896 FALSE, /* pc_relative */
898 complain_overflow_dont, /* complain_on_overflow */
899 ppc64_elf_unhandled_reloc, /* special_function */
900 "R_PPC64_PLT64", /* name */
901 FALSE, /* partial_inplace */
903 ONES (64), /* dst_mask */
904 FALSE), /* pcrel_offset */
906 /* 64-bit PC relative relocation to the symbol's procedure linkage
908 /* FIXME: R_PPC64_PLTREL64 not supported. */
909 HOWTO (R_PPC64_PLTREL64, /* type */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
913 TRUE, /* pc_relative */
915 complain_overflow_dont, /* complain_on_overflow */
916 ppc64_elf_unhandled_reloc, /* special_function */
917 "R_PPC64_PLTREL64", /* name */
918 FALSE, /* partial_inplace */
920 ONES (64), /* dst_mask */
921 TRUE), /* pcrel_offset */
923 /* 16 bit TOC-relative relocation. */
925 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
926 HOWTO (R_PPC64_TOC16, /* type */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
930 FALSE, /* pc_relative */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc64_elf_toc_reloc, /* special_function */
934 "R_PPC64_TOC16", /* name */
935 FALSE, /* partial_inplace */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
940 /* 16 bit TOC-relative relocation without overflow. */
942 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
943 HOWTO (R_PPC64_TOC16_LO, /* type */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
947 FALSE, /* pc_relative */
949 complain_overflow_dont, /* complain_on_overflow */
950 ppc64_elf_toc_reloc, /* special_function */
951 "R_PPC64_TOC16_LO", /* name */
952 FALSE, /* partial_inplace */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
957 /* 16 bit TOC-relative relocation, high 16 bits. */
959 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
960 HOWTO (R_PPC64_TOC16_HI, /* type */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
964 FALSE, /* pc_relative */
966 complain_overflow_dont, /* complain_on_overflow */
967 ppc64_elf_toc_reloc, /* special_function */
968 "R_PPC64_TOC16_HI", /* name */
969 FALSE, /* partial_inplace */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
974 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
975 contents of the low 16 bits, treated as a signed number, is
978 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
979 HOWTO (R_PPC64_TOC16_HA, /* type */
981 1, /* size (0 = byte, 1 = short, 2 = long) */
983 FALSE, /* pc_relative */
985 complain_overflow_dont, /* complain_on_overflow */
986 ppc64_elf_toc_ha_reloc, /* special_function */
987 "R_PPC64_TOC16_HA", /* name */
988 FALSE, /* partial_inplace */
990 0xffff, /* dst_mask */
991 FALSE), /* pcrel_offset */
993 /* 64-bit relocation; insert value of TOC base (.TOC.). */
995 /* R_PPC64_TOC 51 doubleword64 .TOC. */
996 HOWTO (R_PPC64_TOC, /* type */
998 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1000 FALSE, /* pc_relative */
1002 complain_overflow_bitfield, /* complain_on_overflow */
1003 ppc64_elf_toc64_reloc, /* special_function */
1004 "R_PPC64_TOC", /* name */
1005 FALSE, /* partial_inplace */
1007 ONES (64), /* dst_mask */
1008 FALSE), /* pcrel_offset */
1010 /* Like R_PPC64_GOT16, but also informs the link editor that the
1011 value to relocate may (!) refer to a PLT entry which the link
1012 editor (a) may replace with the symbol value. If the link editor
1013 is unable to fully resolve the symbol, it may (b) create a PLT
1014 entry and store the address to the new PLT entry in the GOT.
1015 This permits lazy resolution of function symbols at run time.
1016 The link editor may also skip all of this and just (c) emit a
1017 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1018 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1019 HOWTO (R_PPC64_PLTGOT16, /* type */
1021 1, /* size (0 = byte, 1 = short, 2 = long) */
1023 FALSE, /* pc_relative */
1025 complain_overflow_signed, /* complain_on_overflow */
1026 ppc64_elf_unhandled_reloc, /* special_function */
1027 "R_PPC64_PLTGOT16", /* name */
1028 FALSE, /* partial_inplace */
1030 0xffff, /* dst_mask */
1031 FALSE), /* pcrel_offset */
1033 /* Like R_PPC64_PLTGOT16, but without overflow. */
1034 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1035 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1039 FALSE, /* pc_relative */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 ppc64_elf_unhandled_reloc, /* special_function */
1043 "R_PPC64_PLTGOT16_LO", /* name */
1044 FALSE, /* partial_inplace */
1046 0xffff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
1049 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1050 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1051 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1052 16, /* rightshift */
1053 1, /* size (0 = byte, 1 = short, 2 = long) */
1055 FALSE, /* pc_relative */
1057 complain_overflow_dont, /* complain_on_overflow */
1058 ppc64_elf_unhandled_reloc, /* special_function */
1059 "R_PPC64_PLTGOT16_HI", /* name */
1060 FALSE, /* partial_inplace */
1062 0xffff, /* dst_mask */
1063 FALSE), /* pcrel_offset */
1065 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1066 1 if the contents of the low 16 bits, treated as a signed number,
1068 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1069 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1070 16, /* rightshift */
1071 1, /* size (0 = byte, 1 = short, 2 = long) */
1073 FALSE, /* pc_relative */
1075 complain_overflow_dont,/* complain_on_overflow */
1076 ppc64_elf_unhandled_reloc, /* special_function */
1077 "R_PPC64_PLTGOT16_HA", /* name */
1078 FALSE, /* partial_inplace */
1080 0xffff, /* dst_mask */
1081 FALSE), /* pcrel_offset */
1083 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1084 HOWTO (R_PPC64_ADDR16_DS, /* type */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1088 FALSE, /* pc_relative */
1090 complain_overflow_bitfield, /* complain_on_overflow */
1091 bfd_elf_generic_reloc, /* special_function */
1092 "R_PPC64_ADDR16_DS", /* name */
1093 FALSE, /* partial_inplace */
1095 0xfffc, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1098 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1099 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1103 FALSE, /* pc_relative */
1105 complain_overflow_dont,/* complain_on_overflow */
1106 bfd_elf_generic_reloc, /* special_function */
1107 "R_PPC64_ADDR16_LO_DS",/* name */
1108 FALSE, /* partial_inplace */
1110 0xfffc, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1113 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_GOT16_DS, /* type */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1118 FALSE, /* pc_relative */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc64_elf_unhandled_reloc, /* special_function */
1122 "R_PPC64_GOT16_DS", /* name */
1123 FALSE, /* partial_inplace */
1125 0xfffc, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1128 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1133 FALSE, /* pc_relative */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc64_elf_unhandled_reloc, /* special_function */
1137 "R_PPC64_GOT16_LO_DS", /* name */
1138 FALSE, /* partial_inplace */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1143 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1148 FALSE, /* pc_relative */
1150 complain_overflow_dont, /* complain_on_overflow */
1151 ppc64_elf_unhandled_reloc, /* special_function */
1152 "R_PPC64_PLT16_LO_DS", /* name */
1153 FALSE, /* partial_inplace */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1158 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1163 FALSE, /* pc_relative */
1165 complain_overflow_bitfield, /* complain_on_overflow */
1166 ppc64_elf_sectoff_reloc, /* special_function */
1167 "R_PPC64_SECTOFF_DS", /* name */
1168 FALSE, /* partial_inplace */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1173 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 FALSE, /* pc_relative */
1180 complain_overflow_dont, /* complain_on_overflow */
1181 ppc64_elf_sectoff_reloc, /* special_function */
1182 "R_PPC64_SECTOFF_LO_DS",/* name */
1183 FALSE, /* partial_inplace */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1188 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_TOC16_DS, /* type */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 FALSE, /* pc_relative */
1195 complain_overflow_signed, /* complain_on_overflow */
1196 ppc64_elf_toc_reloc, /* special_function */
1197 "R_PPC64_TOC16_DS", /* name */
1198 FALSE, /* partial_inplace */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1203 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1208 FALSE, /* pc_relative */
1210 complain_overflow_dont, /* complain_on_overflow */
1211 ppc64_elf_toc_reloc, /* special_function */
1212 "R_PPC64_TOC16_LO_DS", /* name */
1213 FALSE, /* partial_inplace */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1218 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1219 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1220 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 FALSE, /* pc_relative */
1226 complain_overflow_signed, /* complain_on_overflow */
1227 ppc64_elf_unhandled_reloc, /* special_function */
1228 "R_PPC64_PLTGOT16_DS", /* name */
1229 FALSE, /* partial_inplace */
1231 0xfffc, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1234 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1235 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1236 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1240 FALSE, /* pc_relative */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc64_elf_unhandled_reloc, /* special_function */
1244 "R_PPC64_PLTGOT16_LO_DS",/* name */
1245 FALSE, /* partial_inplace */
1247 0xfffc, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1250 /* Marker relocs for TLS. */
1253 2, /* size (0 = byte, 1 = short, 2 = long) */
1255 FALSE, /* pc_relative */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 bfd_elf_generic_reloc, /* special_function */
1259 "R_PPC64_TLS", /* name */
1260 FALSE, /* partial_inplace */
1263 FALSE), /* pcrel_offset */
1265 HOWTO (R_PPC64_TLSGD,
1267 2, /* size (0 = byte, 1 = short, 2 = long) */
1269 FALSE, /* pc_relative */
1271 complain_overflow_dont, /* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC64_TLSGD", /* name */
1274 FALSE, /* partial_inplace */
1277 FALSE), /* pcrel_offset */
1279 HOWTO (R_PPC64_TLSLD,
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1283 FALSE, /* pc_relative */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC64_TLSLD", /* name */
1288 FALSE, /* partial_inplace */
1291 FALSE), /* pcrel_offset */
1293 HOWTO (R_PPC64_TOCSAVE,
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 FALSE, /* pc_relative */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TOCSAVE", /* name */
1302 FALSE, /* partial_inplace */
1305 FALSE), /* pcrel_offset */
1307 /* Computes the load module index of the load module that contains the
1308 definition of its TLS sym. */
1309 HOWTO (R_PPC64_DTPMOD64,
1311 4, /* size (0 = byte, 1 = short, 2 = long) */
1313 FALSE, /* pc_relative */
1315 complain_overflow_dont, /* complain_on_overflow */
1316 ppc64_elf_unhandled_reloc, /* special_function */
1317 "R_PPC64_DTPMOD64", /* name */
1318 FALSE, /* partial_inplace */
1320 ONES (64), /* dst_mask */
1321 FALSE), /* pcrel_offset */
1323 /* Computes a dtv-relative displacement, the difference between the value
1324 of sym+add and the base address of the thread-local storage block that
1325 contains the definition of sym, minus 0x8000. */
1326 HOWTO (R_PPC64_DTPREL64,
1328 4, /* size (0 = byte, 1 = short, 2 = long) */
1330 FALSE, /* pc_relative */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPREL64", /* name */
1335 FALSE, /* partial_inplace */
1337 ONES (64), /* dst_mask */
1338 FALSE), /* pcrel_offset */
1340 /* A 16 bit dtprel reloc. */
1341 HOWTO (R_PPC64_DTPREL16,
1343 1, /* size (0 = byte, 1 = short, 2 = long) */
1345 FALSE, /* pc_relative */
1347 complain_overflow_signed, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL16", /* name */
1350 FALSE, /* partial_inplace */
1352 0xffff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1355 /* Like DTPREL16, but no overflow. */
1356 HOWTO (R_PPC64_DTPREL16_LO,
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1360 FALSE, /* pc_relative */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16_LO", /* name */
1365 FALSE, /* partial_inplace */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1370 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1371 HOWTO (R_PPC64_DTPREL16_HI,
1372 16, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1375 FALSE, /* pc_relative */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_HI", /* name */
1380 FALSE, /* partial_inplace */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1385 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1386 HOWTO (R_PPC64_DTPREL16_HA,
1387 16, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1390 FALSE, /* pc_relative */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HA", /* name */
1395 FALSE, /* partial_inplace */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1400 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1401 HOWTO (R_PPC64_DTPREL16_HIGHER,
1402 32, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1405 FALSE, /* pc_relative */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_HIGHER", /* name */
1410 FALSE, /* partial_inplace */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1415 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1417 32, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1420 FALSE, /* pc_relative */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HIGHERA", /* name */
1425 FALSE, /* partial_inplace */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1430 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1432 48, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1435 FALSE, /* pc_relative */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HIGHEST", /* name */
1440 FALSE, /* partial_inplace */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1445 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1447 48, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1450 FALSE, /* pc_relative */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1455 FALSE, /* partial_inplace */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1460 /* Like DTPREL16, but for insns with a DS field. */
1461 HOWTO (R_PPC64_DTPREL16_DS,
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1465 FALSE, /* pc_relative */
1467 complain_overflow_signed, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_DS", /* name */
1470 FALSE, /* partial_inplace */
1472 0xfffc, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1475 /* Like DTPREL16_DS, but no overflow. */
1476 HOWTO (R_PPC64_DTPREL16_LO_DS,
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1480 FALSE, /* pc_relative */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_LO_DS", /* name */
1485 FALSE, /* partial_inplace */
1487 0xfffc, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1490 /* Computes a tp-relative displacement, the difference between the value of
1491 sym+add and the value of the thread pointer (r13). */
1492 HOWTO (R_PPC64_TPREL64,
1494 4, /* size (0 = byte, 1 = short, 2 = long) */
1496 FALSE, /* pc_relative */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc64_elf_unhandled_reloc, /* special_function */
1500 "R_PPC64_TPREL64", /* name */
1501 FALSE, /* partial_inplace */
1503 ONES (64), /* dst_mask */
1504 FALSE), /* pcrel_offset */
1506 /* A 16 bit tprel reloc. */
1507 HOWTO (R_PPC64_TPREL16,
1509 1, /* size (0 = byte, 1 = short, 2 = long) */
1511 FALSE, /* pc_relative */
1513 complain_overflow_signed, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL16", /* name */
1516 FALSE, /* partial_inplace */
1518 0xffff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1521 /* Like TPREL16, but no overflow. */
1522 HOWTO (R_PPC64_TPREL16_LO,
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1526 FALSE, /* pc_relative */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16_LO", /* name */
1531 FALSE, /* partial_inplace */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1536 /* Like TPREL16_LO, but next higher group of 16 bits. */
1537 HOWTO (R_PPC64_TPREL16_HI,
1538 16, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1541 FALSE, /* pc_relative */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_HI", /* name */
1546 FALSE, /* partial_inplace */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1551 /* Like TPREL16_HI, but adjust for low 16 bits. */
1552 HOWTO (R_PPC64_TPREL16_HA,
1553 16, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1556 FALSE, /* pc_relative */
1558 complain_overflow_dont, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HA", /* name */
1561 FALSE, /* partial_inplace */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1566 /* Like TPREL16_HI, but next higher group of 16 bits. */
1567 HOWTO (R_PPC64_TPREL16_HIGHER,
1568 32, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1571 FALSE, /* pc_relative */
1573 complain_overflow_dont, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_HIGHER", /* name */
1576 FALSE, /* partial_inplace */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1581 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HIGHERA,
1583 32, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1586 FALSE, /* pc_relative */
1588 complain_overflow_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HIGHERA", /* name */
1591 FALSE, /* partial_inplace */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1596 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HIGHEST,
1598 48, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1601 FALSE, /* pc_relative */
1603 complain_overflow_dont, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HIGHEST", /* name */
1606 FALSE, /* partial_inplace */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1611 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1613 48, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1616 FALSE, /* pc_relative */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHESTA", /* name */
1621 FALSE, /* partial_inplace */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1626 /* Like TPREL16, but for insns with a DS field. */
1627 HOWTO (R_PPC64_TPREL16_DS,
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1631 FALSE, /* pc_relative */
1633 complain_overflow_signed, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_DS", /* name */
1636 FALSE, /* partial_inplace */
1638 0xfffc, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1641 /* Like TPREL16_DS, but no overflow. */
1642 HOWTO (R_PPC64_TPREL16_LO_DS,
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1646 FALSE, /* pc_relative */
1648 complain_overflow_dont, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_LO_DS", /* name */
1651 FALSE, /* partial_inplace */
1653 0xfffc, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1656 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1657 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1658 to the first entry relative to the TOC base (r2). */
1659 HOWTO (R_PPC64_GOT_TLSGD16,
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1663 FALSE, /* pc_relative */
1665 complain_overflow_signed, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_GOT_TLSGD16", /* name */
1668 FALSE, /* partial_inplace */
1670 0xffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1673 /* Like GOT_TLSGD16, but no overflow. */
1674 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1678 FALSE, /* pc_relative */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc64_elf_unhandled_reloc, /* special_function */
1682 "R_PPC64_GOT_TLSGD16_LO", /* name */
1683 FALSE, /* partial_inplace */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1688 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1689 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1690 16, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1693 FALSE, /* pc_relative */
1695 complain_overflow_dont, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSGD16_HI", /* name */
1698 FALSE, /* partial_inplace */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1703 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1704 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1708 FALSE, /* pc_relative */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16_HA", /* name */
1713 FALSE, /* partial_inplace */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1718 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1719 with values (sym+add)@dtpmod and zero, and computes the offset to the
1720 first entry relative to the TOC base (r2). */
1721 HOWTO (R_PPC64_GOT_TLSLD16,
1723 1, /* size (0 = byte, 1 = short, 2 = long) */
1725 FALSE, /* pc_relative */
1727 complain_overflow_signed, /* complain_on_overflow */
1728 ppc64_elf_unhandled_reloc, /* special_function */
1729 "R_PPC64_GOT_TLSLD16", /* name */
1730 FALSE, /* partial_inplace */
1732 0xffff, /* dst_mask */
1733 FALSE), /* pcrel_offset */
1735 /* Like GOT_TLSLD16, but no overflow. */
1736 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1738 1, /* size (0 = byte, 1 = short, 2 = long) */
1740 FALSE, /* pc_relative */
1742 complain_overflow_dont, /* complain_on_overflow */
1743 ppc64_elf_unhandled_reloc, /* special_function */
1744 "R_PPC64_GOT_TLSLD16_LO", /* name */
1745 FALSE, /* partial_inplace */
1747 0xffff, /* dst_mask */
1748 FALSE), /* pcrel_offset */
1750 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1751 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1752 16, /* rightshift */
1753 1, /* size (0 = byte, 1 = short, 2 = long) */
1755 FALSE, /* pc_relative */
1757 complain_overflow_dont, /* complain_on_overflow */
1758 ppc64_elf_unhandled_reloc, /* special_function */
1759 "R_PPC64_GOT_TLSLD16_HI", /* name */
1760 FALSE, /* partial_inplace */
1762 0xffff, /* dst_mask */
1763 FALSE), /* pcrel_offset */
1765 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1766 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1767 16, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1770 FALSE, /* pc_relative */
1772 complain_overflow_dont, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16_HA", /* name */
1775 FALSE, /* partial_inplace */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1780 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1781 the offset to the entry relative to the TOC base (r2). */
1782 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1784 1, /* size (0 = byte, 1 = short, 2 = long) */
1786 FALSE, /* pc_relative */
1788 complain_overflow_signed, /* complain_on_overflow */
1789 ppc64_elf_unhandled_reloc, /* special_function */
1790 "R_PPC64_GOT_DTPREL16_DS", /* name */
1791 FALSE, /* partial_inplace */
1793 0xfffc, /* dst_mask */
1794 FALSE), /* pcrel_offset */
1796 /* Like GOT_DTPREL16_DS, but no overflow. */
1797 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1799 1, /* size (0 = byte, 1 = short, 2 = long) */
1801 FALSE, /* pc_relative */
1803 complain_overflow_dont, /* complain_on_overflow */
1804 ppc64_elf_unhandled_reloc, /* special_function */
1805 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1806 FALSE, /* partial_inplace */
1808 0xfffc, /* dst_mask */
1809 FALSE), /* pcrel_offset */
1811 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1812 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1813 16, /* rightshift */
1814 1, /* size (0 = byte, 1 = short, 2 = long) */
1816 FALSE, /* pc_relative */
1818 complain_overflow_dont, /* complain_on_overflow */
1819 ppc64_elf_unhandled_reloc, /* special_function */
1820 "R_PPC64_GOT_DTPREL16_HI", /* name */
1821 FALSE, /* partial_inplace */
1823 0xffff, /* dst_mask */
1824 FALSE), /* pcrel_offset */
1826 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1827 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1828 16, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1831 FALSE, /* pc_relative */
1833 complain_overflow_dont, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_HA", /* name */
1836 FALSE, /* partial_inplace */
1838 0xffff, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1841 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1842 offset to the entry relative to the TOC base (r2). */
1843 HOWTO (R_PPC64_GOT_TPREL16_DS,
1845 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 FALSE, /* pc_relative */
1849 complain_overflow_signed, /* complain_on_overflow */
1850 ppc64_elf_unhandled_reloc, /* special_function */
1851 "R_PPC64_GOT_TPREL16_DS", /* name */
1852 FALSE, /* partial_inplace */
1854 0xfffc, /* dst_mask */
1855 FALSE), /* pcrel_offset */
1857 /* Like GOT_TPREL16_DS, but no overflow. */
1858 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1860 1, /* size (0 = byte, 1 = short, 2 = long) */
1862 FALSE, /* pc_relative */
1864 complain_overflow_dont, /* complain_on_overflow */
1865 ppc64_elf_unhandled_reloc, /* special_function */
1866 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1867 FALSE, /* partial_inplace */
1869 0xfffc, /* dst_mask */
1870 FALSE), /* pcrel_offset */
1872 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1873 HOWTO (R_PPC64_GOT_TPREL16_HI,
1874 16, /* rightshift */
1875 1, /* size (0 = byte, 1 = short, 2 = long) */
1877 FALSE, /* pc_relative */
1879 complain_overflow_dont, /* complain_on_overflow */
1880 ppc64_elf_unhandled_reloc, /* special_function */
1881 "R_PPC64_GOT_TPREL16_HI", /* name */
1882 FALSE, /* partial_inplace */
1884 0xffff, /* dst_mask */
1885 FALSE), /* pcrel_offset */
1887 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1888 HOWTO (R_PPC64_GOT_TPREL16_HA,
1889 16, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1892 FALSE, /* pc_relative */
1894 complain_overflow_dont, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_HA", /* name */
1897 FALSE, /* partial_inplace */
1899 0xffff, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1902 HOWTO (R_PPC64_JMP_IREL, /* type */
1904 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1906 FALSE, /* pc_relative */
1908 complain_overflow_dont, /* complain_on_overflow */
1909 ppc64_elf_unhandled_reloc, /* special_function */
1910 "R_PPC64_JMP_IREL", /* name */
1911 FALSE, /* partial_inplace */
1914 FALSE), /* pcrel_offset */
1916 HOWTO (R_PPC64_IRELATIVE, /* type */
1918 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1920 FALSE, /* pc_relative */
1922 complain_overflow_dont, /* complain_on_overflow */
1923 bfd_elf_generic_reloc, /* special_function */
1924 "R_PPC64_IRELATIVE", /* name */
1925 FALSE, /* partial_inplace */
1927 ONES (64), /* dst_mask */
1928 FALSE), /* pcrel_offset */
1930 /* A 16 bit relative relocation. */
1931 HOWTO (R_PPC64_REL16, /* type */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1935 TRUE, /* pc_relative */
1937 complain_overflow_bitfield, /* complain_on_overflow */
1938 bfd_elf_generic_reloc, /* special_function */
1939 "R_PPC64_REL16", /* name */
1940 FALSE, /* partial_inplace */
1942 0xffff, /* dst_mask */
1943 TRUE), /* pcrel_offset */
1945 /* A 16 bit relative relocation without overflow. */
1946 HOWTO (R_PPC64_REL16_LO, /* type */
1948 1, /* size (0 = byte, 1 = short, 2 = long) */
1950 TRUE, /* pc_relative */
1952 complain_overflow_dont,/* complain_on_overflow */
1953 bfd_elf_generic_reloc, /* special_function */
1954 "R_PPC64_REL16_LO", /* name */
1955 FALSE, /* partial_inplace */
1957 0xffff, /* dst_mask */
1958 TRUE), /* pcrel_offset */
1960 /* The high order 16 bits of a relative address. */
1961 HOWTO (R_PPC64_REL16_HI, /* type */
1962 16, /* rightshift */
1963 1, /* size (0 = byte, 1 = short, 2 = long) */
1965 TRUE, /* pc_relative */
1967 complain_overflow_dont, /* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_REL16_HI", /* name */
1970 FALSE, /* partial_inplace */
1972 0xffff, /* dst_mask */
1973 TRUE), /* pcrel_offset */
1975 /* The high order 16 bits of a relative address, plus 1 if the contents of
1976 the low 16 bits, treated as a signed number, is negative. */
1977 HOWTO (R_PPC64_REL16_HA, /* type */
1978 16, /* rightshift */
1979 1, /* size (0 = byte, 1 = short, 2 = long) */
1981 TRUE, /* pc_relative */
1983 complain_overflow_dont, /* complain_on_overflow */
1984 ppc64_elf_ha_reloc, /* special_function */
1985 "R_PPC64_REL16_HA", /* name */
1986 FALSE, /* partial_inplace */
1988 0xffff, /* dst_mask */
1989 TRUE), /* pcrel_offset */
1991 /* GNU extension to record C++ vtable hierarchy. */
1992 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1994 0, /* size (0 = byte, 1 = short, 2 = long) */
1996 FALSE, /* pc_relative */
1998 complain_overflow_dont, /* complain_on_overflow */
1999 NULL, /* special_function */
2000 "R_PPC64_GNU_VTINHERIT", /* name */
2001 FALSE, /* partial_inplace */
2004 FALSE), /* pcrel_offset */
2006 /* GNU extension to record C++ vtable member usage. */
2007 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2009 0, /* size (0 = byte, 1 = short, 2 = long) */
2011 FALSE, /* pc_relative */
2013 complain_overflow_dont, /* complain_on_overflow */
2014 NULL, /* special_function */
2015 "R_PPC64_GNU_VTENTRY", /* name */
2016 FALSE, /* partial_inplace */
2019 FALSE), /* pcrel_offset */
2023 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2027 ppc_howto_init (void)
2029 unsigned int i, type;
2032 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2035 type = ppc64_elf_howto_raw[i].type;
2036 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2037 / sizeof (ppc64_elf_howto_table[0])));
2038 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2042 static reloc_howto_type *
2043 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2044 bfd_reloc_code_real_type code)
2046 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2048 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2049 /* Initialize howto table if needed. */
2057 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2059 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2061 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2063 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2065 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2067 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2069 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2071 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2073 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2075 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2077 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2079 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2081 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2083 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2085 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2087 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2089 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2091 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2093 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2095 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2097 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2099 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2101 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2103 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2105 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2107 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2109 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2111 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2113 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2115 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2117 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2119 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2121 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2123 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2125 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2127 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2129 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2131 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2133 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2135 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2137 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2139 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2141 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2143 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2145 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2147 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2149 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2151 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2153 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2155 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2157 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2159 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2161 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2163 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2165 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2167 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2169 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2171 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2173 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2175 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2177 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2179 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2181 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2183 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2185 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2187 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2189 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2191 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2193 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2195 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2197 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2199 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2201 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2203 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2205 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2207 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2209 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2211 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2213 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2215 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2217 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2219 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2221 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2223 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2225 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2227 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2229 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2231 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2233 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2235 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2237 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2239 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2241 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2243 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2245 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2247 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2249 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2251 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2253 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2255 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2257 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2259 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2261 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2263 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2265 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2267 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2269 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2273 return ppc64_elf_howto_table[r];
2276 static reloc_howto_type *
2277 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2283 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2285 if (ppc64_elf_howto_raw[i].name != NULL
2286 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2287 return &ppc64_elf_howto_raw[i];
2292 /* Set the howto pointer for a PowerPC ELF reloc. */
2295 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2296 Elf_Internal_Rela *dst)
2300 /* Initialize howto table if needed. */
2301 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2304 type = ELF64_R_TYPE (dst->r_info);
2305 if (type >= (sizeof (ppc64_elf_howto_table)
2306 / sizeof (ppc64_elf_howto_table[0])))
2308 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2310 type = R_PPC64_NONE;
2312 cache_ptr->howto = ppc64_elf_howto_table[type];
2315 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2317 static bfd_reloc_status_type
2318 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2319 void *data, asection *input_section,
2320 bfd *output_bfd, char **error_message)
2322 /* If this is a relocatable link (output_bfd test tells us), just
2323 call the generic function. Any adjustment will be done at final
2325 if (output_bfd != NULL)
2326 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2327 input_section, output_bfd, error_message);
2329 /* Adjust the addend for sign extension of the low 16 bits.
2330 We won't actually be using the low 16 bits, so trashing them
2332 reloc_entry->addend += 0x8000;
2333 return bfd_reloc_continue;
2336 static bfd_reloc_status_type
2337 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2338 void *data, asection *input_section,
2339 bfd *output_bfd, char **error_message)
2341 if (output_bfd != NULL)
2342 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2343 input_section, output_bfd, error_message);
2345 if (strcmp (symbol->section->name, ".opd") == 0
2346 && (symbol->section->owner->flags & DYNAMIC) == 0)
2348 bfd_vma dest = opd_entry_value (symbol->section,
2349 symbol->value + reloc_entry->addend,
2351 if (dest != (bfd_vma) -1)
2352 reloc_entry->addend = dest - (symbol->value
2353 + symbol->section->output_section->vma
2354 + symbol->section->output_offset);
2356 return bfd_reloc_continue;
2359 static bfd_reloc_status_type
2360 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2361 void *data, asection *input_section,
2362 bfd *output_bfd, char **error_message)
2365 enum elf_ppc64_reloc_type r_type;
2366 bfd_size_type octets;
2367 /* Assume 'at' branch hints. */
2368 bfd_boolean is_isa_v2 = TRUE;
2370 /* If this is a relocatable link (output_bfd test tells us), just
2371 call the generic function. Any adjustment will be done at final
2373 if (output_bfd != NULL)
2374 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2375 input_section, output_bfd, error_message);
2377 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2378 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2379 insn &= ~(0x01 << 21);
2380 r_type = reloc_entry->howto->type;
2381 if (r_type == R_PPC64_ADDR14_BRTAKEN
2382 || r_type == R_PPC64_REL14_BRTAKEN)
2383 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2387 /* Set 'a' bit. This is 0b00010 in BO field for branch
2388 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2389 for branch on CTR insns (BO == 1a00t or 1a01t). */
2390 if ((insn & (0x14 << 21)) == (0x04 << 21))
2392 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2402 if (!bfd_is_com_section (symbol->section))
2403 target = symbol->value;
2404 target += symbol->section->output_section->vma;
2405 target += symbol->section->output_offset;
2406 target += reloc_entry->addend;
2408 from = (reloc_entry->address
2409 + input_section->output_offset
2410 + input_section->output_section->vma);
2412 /* Invert 'y' bit if not the default. */
2413 if ((bfd_signed_vma) (target - from) < 0)
2416 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2418 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2419 input_section, output_bfd, error_message);
2422 static bfd_reloc_status_type
2423 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2424 void *data, asection *input_section,
2425 bfd *output_bfd, char **error_message)
2427 /* If this is a relocatable link (output_bfd test tells us), just
2428 call the generic function. Any adjustment will be done at final
2430 if (output_bfd != NULL)
2431 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2432 input_section, output_bfd, error_message);
2434 /* Subtract the symbol section base address. */
2435 reloc_entry->addend -= symbol->section->output_section->vma;
2436 return bfd_reloc_continue;
2439 static bfd_reloc_status_type
2440 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2441 void *data, asection *input_section,
2442 bfd *output_bfd, char **error_message)
2444 /* If this is a relocatable link (output_bfd test tells us), just
2445 call the generic function. Any adjustment will be done at final
2447 if (output_bfd != NULL)
2448 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2449 input_section, output_bfd, error_message);
2451 /* Subtract the symbol section base address. */
2452 reloc_entry->addend -= symbol->section->output_section->vma;
2454 /* Adjust the addend for sign extension of the low 16 bits. */
2455 reloc_entry->addend += 0x8000;
2456 return bfd_reloc_continue;
2459 static bfd_reloc_status_type
2460 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2461 void *data, asection *input_section,
2462 bfd *output_bfd, char **error_message)
2466 /* If this is a relocatable link (output_bfd test tells us), just
2467 call the generic function. Any adjustment will be done at final
2469 if (output_bfd != NULL)
2470 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2471 input_section, output_bfd, error_message);
2473 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2475 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2477 /* Subtract the TOC base address. */
2478 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2479 return bfd_reloc_continue;
2482 static bfd_reloc_status_type
2483 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2484 void *data, asection *input_section,
2485 bfd *output_bfd, char **error_message)
2489 /* If this is a relocatable link (output_bfd test tells us), just
2490 call the generic function. Any adjustment will be done at final
2492 if (output_bfd != NULL)
2493 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2494 input_section, output_bfd, error_message);
2496 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2498 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2500 /* Subtract the TOC base address. */
2501 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2503 /* Adjust the addend for sign extension of the low 16 bits. */
2504 reloc_entry->addend += 0x8000;
2505 return bfd_reloc_continue;
2508 static bfd_reloc_status_type
2509 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2510 void *data, asection *input_section,
2511 bfd *output_bfd, char **error_message)
2514 bfd_size_type octets;
2516 /* If this is a relocatable link (output_bfd test tells us), just
2517 call the generic function. Any adjustment will be done at final
2519 if (output_bfd != NULL)
2520 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2521 input_section, output_bfd, error_message);
2523 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2525 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2527 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2528 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2529 return bfd_reloc_ok;
2532 static bfd_reloc_status_type
2533 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2534 void *data, asection *input_section,
2535 bfd *output_bfd, char **error_message)
2537 /* If this is a relocatable link (output_bfd test tells us), just
2538 call the generic function. Any adjustment will be done at final
2540 if (output_bfd != NULL)
2541 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2542 input_section, output_bfd, error_message);
2544 if (error_message != NULL)
2546 static char buf[60];
2547 sprintf (buf, "generic linker can't handle %s",
2548 reloc_entry->howto->name);
2549 *error_message = buf;
2551 return bfd_reloc_dangerous;
2554 /* Track GOT entries needed for a given symbol. We might need more
2555 than one got entry per symbol. */
2558 struct got_entry *next;
2560 /* The symbol addend that we'll be placing in the GOT. */
2563 /* Unlike other ELF targets, we use separate GOT entries for the same
2564 symbol referenced from different input files. This is to support
2565 automatic multiple TOC/GOT sections, where the TOC base can vary
2566 from one input file to another. After partitioning into TOC groups
2567 we merge entries within the group.
2569 Point to the BFD owning this GOT entry. */
2572 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2573 TLS_TPREL or TLS_DTPREL for tls entries. */
2574 unsigned char tls_type;
2576 /* Non-zero if got.ent points to real entry. */
2577 unsigned char is_indirect;
2579 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2582 bfd_signed_vma refcount;
2584 struct got_entry *ent;
2588 /* The same for PLT. */
2591 struct plt_entry *next;
2597 bfd_signed_vma refcount;
2602 struct ppc64_elf_obj_tdata
2604 struct elf_obj_tdata elf;
2606 /* Shortcuts to dynamic linker sections. */
2610 /* Used during garbage collection. We attach global symbols defined
2611 on removed .opd entries to this section so that the sym is removed. */
2612 asection *deleted_section;
2614 /* TLS local dynamic got entry handling. Support for multiple GOT
2615 sections means we potentially need one of these for each input bfd. */
2616 struct got_entry tlsld_got;
2618 /* A copy of relocs before they are modified for --emit-relocs. */
2619 Elf_Internal_Rela *opd_relocs;
2621 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2622 the reloc to be in the range -32768 to 32767. */
2623 unsigned int has_small_toc_reloc : 1;
2625 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2626 instruction not one we handle. */
2627 unsigned int unexpected_toc_insn : 1;
2630 #define ppc64_elf_tdata(bfd) \
2631 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2633 #define ppc64_tlsld_got(bfd) \
2634 (&ppc64_elf_tdata (bfd)->tlsld_got)
2636 #define is_ppc64_elf(bfd) \
2637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2638 && elf_object_id (bfd) == PPC64_ELF_DATA)
2640 /* Override the generic function because we store some extras. */
2643 ppc64_elf_mkobject (bfd *abfd)
2645 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2649 /* Fix bad default arch selected for a 64 bit input bfd when the
2650 default is 32 bit. */
2653 ppc64_elf_object_p (bfd *abfd)
2655 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2657 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2659 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2661 /* Relies on arch after 32 bit default being 64 bit default. */
2662 abfd->arch_info = abfd->arch_info->next;
2663 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2669 /* Support for core dump NOTE sections. */
2672 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2674 size_t offset, size;
2676 if (note->descsz != 504)
2680 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2683 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2689 /* Make a ".reg/999" section. */
2690 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2691 size, note->descpos + offset);
2695 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2697 if (note->descsz != 136)
2700 elf_tdata (abfd)->core->pid
2701 = bfd_get_32 (abfd, note->descdata + 24);
2702 elf_tdata (abfd)->core->program
2703 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2704 elf_tdata (abfd)->core->command
2705 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2711 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2724 va_start (ap, note_type);
2725 memset (data, 0, sizeof (data));
2726 strncpy (data + 40, va_arg (ap, const char *), 16);
2727 strncpy (data + 56, va_arg (ap, const char *), 80);
2729 return elfcore_write_note (abfd, buf, bufsiz,
2730 "CORE", note_type, data, sizeof (data));
2741 va_start (ap, note_type);
2742 memset (data, 0, 112);
2743 pid = va_arg (ap, long);
2744 bfd_put_32 (abfd, pid, data + 32);
2745 cursig = va_arg (ap, int);
2746 bfd_put_16 (abfd, cursig, data + 12);
2747 greg = va_arg (ap, const void *);
2748 memcpy (data + 112, greg, 384);
2749 memset (data + 496, 0, 8);
2751 return elfcore_write_note (abfd, buf, bufsiz,
2752 "CORE", note_type, data, sizeof (data));
2757 /* Add extra PPC sections. */
2759 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2761 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2762 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2766 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2767 { NULL, 0, 0, 0, 0 }
2770 enum _ppc64_sec_type {
2776 struct _ppc64_elf_section_data
2778 struct bfd_elf_section_data elf;
2782 /* An array with one entry for each opd function descriptor. */
2783 struct _opd_sec_data
2785 /* Points to the function code section for local opd entries. */
2786 asection **func_sec;
2788 /* After editing .opd, adjust references to opd local syms. */
2792 /* An array for toc sections, indexed by offset/8. */
2793 struct _toc_sec_data
2795 /* Specifies the relocation symbol index used at a given toc offset. */
2798 /* And the relocation addend. */
2803 enum _ppc64_sec_type sec_type:2;
2805 /* Flag set when small branches are detected. Used to
2806 select suitable defaults for the stub group size. */
2807 unsigned int has_14bit_branch:1;
2810 #define ppc64_elf_section_data(sec) \
2811 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2814 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2816 if (!sec->used_by_bfd)
2818 struct _ppc64_elf_section_data *sdata;
2819 bfd_size_type amt = sizeof (*sdata);
2821 sdata = bfd_zalloc (abfd, amt);
2824 sec->used_by_bfd = sdata;
2827 return _bfd_elf_new_section_hook (abfd, sec);
2830 static struct _opd_sec_data *
2831 get_opd_info (asection * sec)
2834 && ppc64_elf_section_data (sec) != NULL
2835 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2836 return &ppc64_elf_section_data (sec)->u.opd;
2840 /* Parameters for the qsort hook. */
2841 static bfd_boolean synthetic_relocatable;
2843 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2846 compare_symbols (const void *ap, const void *bp)
2848 const asymbol *a = * (const asymbol **) ap;
2849 const asymbol *b = * (const asymbol **) bp;
2851 /* Section symbols first. */
2852 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2854 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2857 /* then .opd symbols. */
2858 if (strcmp (a->section->name, ".opd") == 0
2859 && strcmp (b->section->name, ".opd") != 0)
2861 if (strcmp (a->section->name, ".opd") != 0
2862 && strcmp (b->section->name, ".opd") == 0)
2865 /* then other code symbols. */
2866 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 == (SEC_CODE | SEC_ALLOC)
2868 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 != (SEC_CODE | SEC_ALLOC))
2872 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 != (SEC_CODE | SEC_ALLOC)
2874 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2875 == (SEC_CODE | SEC_ALLOC))
2878 if (synthetic_relocatable)
2880 if (a->section->id < b->section->id)
2883 if (a->section->id > b->section->id)
2887 if (a->value + a->section->vma < b->value + b->section->vma)
2890 if (a->value + a->section->vma > b->value + b->section->vma)
2893 /* For syms with the same value, prefer strong dynamic global function
2894 syms over other syms. */
2895 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2898 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2901 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2904 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2907 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2910 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2913 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2916 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2922 /* Search SYMS for a symbol of the given VALUE. */
2925 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2933 mid = (lo + hi) >> 1;
2934 if (syms[mid]->value + syms[mid]->section->vma < value)
2936 else if (syms[mid]->value + syms[mid]->section->vma > value)
2946 mid = (lo + hi) >> 1;
2947 if (syms[mid]->section->id < id)
2949 else if (syms[mid]->section->id > id)
2951 else if (syms[mid]->value < value)
2953 else if (syms[mid]->value > value)
2963 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2965 bfd_vma vma = *(bfd_vma *) ptr;
2966 return ((section->flags & SEC_ALLOC) != 0
2967 && section->vma <= vma
2968 && vma < section->vma + section->size);
2971 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2972 entry syms. Also generate @plt symbols for the glink branch table. */
2975 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2976 long static_count, asymbol **static_syms,
2977 long dyn_count, asymbol **dyn_syms,
2984 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2986 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2991 opd = bfd_get_section_by_name (abfd, ".opd");
2995 symcount = static_count;
2997 symcount += dyn_count;
3001 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3005 if (!relocatable && static_count != 0 && dyn_count != 0)
3007 /* Use both symbol tables. */
3008 memcpy (syms, static_syms, static_count * sizeof (*syms));
3009 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3011 else if (!relocatable && static_count == 0)
3012 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3014 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3016 synthetic_relocatable = relocatable;
3017 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3019 if (!relocatable && symcount > 1)
3022 /* Trim duplicate syms, since we may have merged the normal and
3023 dynamic symbols. Actually, we only care about syms that have
3024 different values, so trim any with the same value. */
3025 for (i = 1, j = 1; i < symcount; ++i)
3026 if (syms[i - 1]->value + syms[i - 1]->section->vma
3027 != syms[i]->value + syms[i]->section->vma)
3028 syms[j++] = syms[i];
3033 if (strcmp (syms[i]->section->name, ".opd") == 0)
3037 for (; i < symcount; ++i)
3038 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3039 != (SEC_CODE | SEC_ALLOC))
3040 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3044 for (; i < symcount; ++i)
3045 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3049 for (; i < symcount; ++i)
3050 if (strcmp (syms[i]->section->name, ".opd") != 0)
3054 for (; i < symcount; ++i)
3055 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3056 != (SEC_CODE | SEC_ALLOC))
3064 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3069 if (opdsymend == secsymend)
3072 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3073 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3077 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3084 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3088 while (r < opd->relocation + relcount
3089 && r->address < syms[i]->value + opd->vma)
3092 if (r == opd->relocation + relcount)
3095 if (r->address != syms[i]->value + opd->vma)
3098 if (r->howto->type != R_PPC64_ADDR64)
3101 sym = *r->sym_ptr_ptr;
3102 if (!sym_exists_at (syms, opdsymend, symcount,
3103 sym->section->id, sym->value + r->addend))
3106 size += sizeof (asymbol);
3107 size += strlen (syms[i]->name) + 2;
3111 s = *ret = bfd_malloc (size);
3118 names = (char *) (s + count);
3120 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3124 while (r < opd->relocation + relcount
3125 && r->address < syms[i]->value + opd->vma)
3128 if (r == opd->relocation + relcount)
3131 if (r->address != syms[i]->value + opd->vma)
3134 if (r->howto->type != R_PPC64_ADDR64)
3137 sym = *r->sym_ptr_ptr;
3138 if (!sym_exists_at (syms, opdsymend, symcount,
3139 sym->section->id, sym->value + r->addend))
3144 s->flags |= BSF_SYNTHETIC;
3145 s->section = sym->section;
3146 s->value = sym->value + r->addend;
3149 len = strlen (syms[i]->name);
3150 memcpy (names, syms[i]->name, len + 1);
3152 /* Have udata.p point back to the original symbol this
3153 synthetic symbol was derived from. */
3154 s->udata.p = syms[i];
3161 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3165 bfd_vma glink_vma = 0, resolv_vma = 0;
3166 asection *dynamic, *glink = NULL, *relplt = NULL;
3169 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3173 free_contents_and_exit:
3181 for (i = secsymend; i < opdsymend; ++i)
3185 /* Ignore bogus symbols. */
3186 if (syms[i]->value > opd->size - 8)
3189 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3190 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3193 size += sizeof (asymbol);
3194 size += strlen (syms[i]->name) + 2;
3198 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3200 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3202 bfd_byte *dynbuf, *extdyn, *extdynend;
3204 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3206 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3207 goto free_contents_and_exit;
3209 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3210 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3213 extdynend = extdyn + dynamic->size;
3214 for (; extdyn < extdynend; extdyn += extdynsize)
3216 Elf_Internal_Dyn dyn;
3217 (*swap_dyn_in) (abfd, extdyn, &dyn);
3219 if (dyn.d_tag == DT_NULL)
3222 if (dyn.d_tag == DT_PPC64_GLINK)
3224 /* The first glink stub starts at offset 32; see comment in
3225 ppc64_elf_finish_dynamic_sections. */
3226 glink_vma = dyn.d_un.d_val + 32;
3227 /* The .glink section usually does not survive the final
3228 link; search for the section (usually .text) where the
3229 glink stubs now reside. */
3230 glink = bfd_sections_find_if (abfd, section_covers_vma,
3241 /* Determine __glink trampoline by reading the relative branch
3242 from the first glink stub. */
3244 if (bfd_get_section_contents (abfd, glink, buf,
3245 glink_vma + 4 - glink->vma, 4))
3247 unsigned int insn = bfd_get_32 (abfd, buf);
3249 if ((insn & ~0x3fffffc) == 0)
3250 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3254 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3256 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3259 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3260 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3261 goto free_contents_and_exit;
3263 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3264 size += plt_count * sizeof (asymbol);
3266 p = relplt->relocation;
3267 for (i = 0; i < plt_count; i++, p++)
3269 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3271 size += sizeof ("+0x") - 1 + 16;
3276 s = *ret = bfd_malloc (size);
3278 goto free_contents_and_exit;
3280 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3282 for (i = secsymend; i < opdsymend; ++i)
3286 if (syms[i]->value > opd->size - 8)
3289 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3290 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3294 asection *sec = abfd->sections;
3301 long mid = (lo + hi) >> 1;
3302 if (syms[mid]->section->vma < ent)
3304 else if (syms[mid]->section->vma > ent)
3308 sec = syms[mid]->section;
3313 if (lo >= hi && lo > codesecsym)
3314 sec = syms[lo - 1]->section;
3316 for (; sec != NULL; sec = sec->next)
3320 /* SEC_LOAD may not be set if SEC is from a separate debug
3322 if ((sec->flags & SEC_ALLOC) == 0)
3324 if ((sec->flags & SEC_CODE) != 0)
3327 s->flags |= BSF_SYNTHETIC;
3328 s->value = ent - s->section->vma;
3331 len = strlen (syms[i]->name);
3332 memcpy (names, syms[i]->name, len + 1);
3334 /* Have udata.p point back to the original symbol this
3335 synthetic symbol was derived from. */
3336 s->udata.p = syms[i];
3342 if (glink != NULL && relplt != NULL)
3346 /* Add a symbol for the main glink trampoline. */
3347 memset (s, 0, sizeof *s);
3349 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3351 s->value = resolv_vma - glink->vma;
3353 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3354 names += sizeof ("__glink_PLTresolve");
3359 /* FIXME: It would be very much nicer to put sym@plt on the
3360 stub rather than on the glink branch table entry. The
3361 objdump disassembler would then use a sensible symbol
3362 name on plt calls. The difficulty in doing so is
3363 a) finding the stubs, and,
3364 b) matching stubs against plt entries, and,
3365 c) there can be multiple stubs for a given plt entry.
3367 Solving (a) could be done by code scanning, but older
3368 ppc64 binaries used different stubs to current code.
3369 (b) is the tricky one since you need to known the toc
3370 pointer for at least one function that uses a pic stub to
3371 be able to calculate the plt address referenced.
3372 (c) means gdb would need to set multiple breakpoints (or
3373 find the glink branch itself) when setting breakpoints
3374 for pending shared library loads. */
3375 p = relplt->relocation;
3376 for (i = 0; i < plt_count; i++, p++)
3380 *s = **p->sym_ptr_ptr;
3381 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3382 we are defining a symbol, ensure one of them is set. */
3383 if ((s->flags & BSF_LOCAL) == 0)
3384 s->flags |= BSF_GLOBAL;
3385 s->flags |= BSF_SYNTHETIC;
3387 s->value = glink_vma - glink->vma;
3390 len = strlen ((*p->sym_ptr_ptr)->name);
3391 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3395 memcpy (names, "+0x", sizeof ("+0x") - 1);
3396 names += sizeof ("+0x") - 1;
3397 bfd_sprintf_vma (abfd, names, p->addend);
3398 names += strlen (names);
3400 memcpy (names, "@plt", sizeof ("@plt"));
3401 names += sizeof ("@plt");
3416 /* The following functions are specific to the ELF linker, while
3417 functions above are used generally. Those named ppc64_elf_* are
3418 called by the main ELF linker code. They appear in this file more
3419 or less in the order in which they are called. eg.
3420 ppc64_elf_check_relocs is called early in the link process,
3421 ppc64_elf_finish_dynamic_sections is one of the last functions
3424 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3425 functions have both a function code symbol and a function descriptor
3426 symbol. A call to foo in a relocatable object file looks like:
3433 The function definition in another object file might be:
3437 . .quad .TOC.@tocbase
3443 When the linker resolves the call during a static link, the branch
3444 unsurprisingly just goes to .foo and the .opd information is unused.
3445 If the function definition is in a shared library, things are a little
3446 different: The call goes via a plt call stub, the opd information gets
3447 copied to the plt, and the linker patches the nop.
3455 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3456 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3457 . std 2,40(1) # this is the general idea
3465 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3467 The "reloc ()" notation is supposed to indicate that the linker emits
3468 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3471 What are the difficulties here? Well, firstly, the relocations
3472 examined by the linker in check_relocs are against the function code
3473 sym .foo, while the dynamic relocation in the plt is emitted against
3474 the function descriptor symbol, foo. Somewhere along the line, we need
3475 to carefully copy dynamic link information from one symbol to the other.
3476 Secondly, the generic part of the elf linker will make .foo a dynamic
3477 symbol as is normal for most other backends. We need foo dynamic
3478 instead, at least for an application final link. However, when
3479 creating a shared library containing foo, we need to have both symbols
3480 dynamic so that references to .foo are satisfied during the early
3481 stages of linking. Otherwise the linker might decide to pull in a
3482 definition from some other object, eg. a static library.
3484 Update: As of August 2004, we support a new convention. Function
3485 calls may use the function descriptor symbol, ie. "bl foo". This
3486 behaves exactly as "bl .foo". */
3488 /* Of those relocs that might be copied as dynamic relocs, this function
3489 selects those that must be copied when linking a shared library,
3490 even when the symbol is local. */
3493 must_be_dyn_reloc (struct bfd_link_info *info,
3494 enum elf_ppc64_reloc_type r_type)
3506 case R_PPC64_TPREL16:
3507 case R_PPC64_TPREL16_LO:
3508 case R_PPC64_TPREL16_HI:
3509 case R_PPC64_TPREL16_HA:
3510 case R_PPC64_TPREL16_DS:
3511 case R_PPC64_TPREL16_LO_DS:
3512 case R_PPC64_TPREL16_HIGHER:
3513 case R_PPC64_TPREL16_HIGHERA:
3514 case R_PPC64_TPREL16_HIGHEST:
3515 case R_PPC64_TPREL16_HIGHESTA:
3516 case R_PPC64_TPREL64:
3517 return !info->executable;
3521 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3522 copying dynamic variables from a shared lib into an app's dynbss
3523 section, and instead use a dynamic relocation to point into the
3524 shared lib. With code that gcc generates, it's vital that this be
3525 enabled; In the PowerPC64 ABI, the address of a function is actually
3526 the address of a function descriptor, which resides in the .opd
3527 section. gcc uses the descriptor directly rather than going via the
3528 GOT as some other ABI's do, which means that initialized function
3529 pointers must reference the descriptor. Thus, a function pointer
3530 initialized to the address of a function in a shared library will
3531 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3532 redefines the function descriptor symbol to point to the copy. This
3533 presents a problem as a plt entry for that function is also
3534 initialized from the function descriptor symbol and the copy reloc
3535 may not be initialized first. */
3536 #define ELIMINATE_COPY_RELOCS 1
3538 /* Section name for stubs is the associated section name plus this
3540 #define STUB_SUFFIX ".stub"
3543 ppc_stub_long_branch:
3544 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3545 destination, but a 24 bit branch in a stub section will reach.
3548 ppc_stub_plt_branch:
3549 Similar to the above, but a 24 bit branch in the stub section won't
3550 reach its destination.
3551 . addis %r12,%r2,xxx@toc@ha
3552 . ld %r11,xxx@toc@l(%r12)
3557 Used to call a function in a shared library. If it so happens that
3558 the plt entry referenced crosses a 64k boundary, then an extra
3559 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3560 . addis %r12,%r2,xxx@toc@ha
3562 . ld %r11,xxx+0@toc@l(%r12)
3564 . ld %r2,xxx+8@toc@l(%r12)
3565 . ld %r11,xxx+16@toc@l(%r12)
3568 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3569 code to adjust the value and save r2 to support multiple toc sections.
3570 A ppc_stub_long_branch with an r2 offset looks like:
3572 . addis %r2,%r2,off@ha
3573 . addi %r2,%r2,off@l
3576 A ppc_stub_plt_branch with an r2 offset looks like:
3578 . addis %r12,%r2,xxx@toc@ha
3579 . ld %r11,xxx@toc@l(%r12)
3580 . addis %r2,%r2,off@ha
3581 . addi %r2,%r2,off@l
3585 In cases where the "addis" instruction would add zero, the "addis" is
3586 omitted and following instructions modified slightly in some cases.
3589 enum ppc_stub_type {
3591 ppc_stub_long_branch,
3592 ppc_stub_long_branch_r2off,
3593 ppc_stub_plt_branch,
3594 ppc_stub_plt_branch_r2off,
3596 ppc_stub_plt_call_r2save
3599 struct ppc_stub_hash_entry {
3601 /* Base hash table entry structure. */
3602 struct bfd_hash_entry root;
3604 enum ppc_stub_type stub_type;
3606 /* The stub section. */
3609 /* Offset within stub_sec of the beginning of this stub. */
3610 bfd_vma stub_offset;
3612 /* Given the symbol's value and its section we can determine its final
3613 value when building the stubs (so the stub knows where to jump. */
3614 bfd_vma target_value;
3615 asection *target_section;
3617 /* The symbol table entry, if any, that this was derived from. */
3618 struct ppc_link_hash_entry *h;
3619 struct plt_entry *plt_ent;
3621 /* And the reloc addend that this was derived from. */
3624 /* Where this stub is being called from, or, in the case of combined
3625 stub sections, the first input section in the group. */
3629 struct ppc_branch_hash_entry {
3631 /* Base hash table entry structure. */
3632 struct bfd_hash_entry root;
3634 /* Offset within branch lookup table. */
3635 unsigned int offset;
3637 /* Generation marker. */
3641 /* 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 special .TOC. symbol. */
3776 struct ppc_link_hash_entry *dot_toc_dot;
3778 /* The size of reliplt used by got entry relocs. */
3779 bfd_size_type got_reli_size;
3782 unsigned long stub_count[ppc_stub_plt_call_r2save];
3784 /* Number of stubs against global syms. */
3785 unsigned long stub_globals;
3787 /* Alignment of PLT call stubs. */
3788 unsigned int plt_stub_align:4;
3790 /* Set if PLT call stubs should load r11. */
3791 unsigned int plt_static_chain:1;
3793 /* Set if PLT call stubs need a read-read barrier. */
3794 unsigned int plt_thread_safe:1;
3796 /* Set if we should emit symbols for stubs. */
3797 unsigned int emit_stub_syms:1;
3799 /* Set if __tls_get_addr optimization should not be done. */
3800 unsigned int no_tls_get_addr_opt:1;
3802 /* Support for multiple toc sections. */
3803 unsigned int do_multi_toc:1;
3804 unsigned int multi_toc_needed:1;
3805 unsigned int second_toc_pass:1;
3806 unsigned int do_toc_opt:1;
3809 unsigned int stub_error:1;
3811 /* Temp used by ppc64_elf_process_dot_syms. */
3812 unsigned int twiddled_syms:1;
3814 /* Incremented every time we size stubs. */
3815 unsigned int stub_iteration;
3817 /* Small local sym cache. */
3818 struct sym_cache sym_cache;
3821 /* Rename some of the generic section flags to better document how they
3824 /* Nonzero if this section has TLS related relocations. */
3825 #define has_tls_reloc sec_flg0
3827 /* Nonzero if this section has a call to __tls_get_addr. */
3828 #define has_tls_get_addr_call sec_flg1
3830 /* Nonzero if this section has any toc or got relocs. */
3831 #define has_toc_reloc sec_flg2
3833 /* Nonzero if this section has a call to another section that uses
3835 #define makes_toc_func_call sec_flg3
3837 /* Recursion protection when determining above flag. */
3838 #define call_check_in_progress sec_flg4
3839 #define call_check_done sec_flg5
3841 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3843 #define ppc_hash_table(p) \
3844 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3845 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3847 #define ppc_stub_hash_lookup(table, string, create, copy) \
3848 ((struct ppc_stub_hash_entry *) \
3849 bfd_hash_lookup ((table), (string), (create), (copy)))
3851 #define ppc_branch_hash_lookup(table, string, create, copy) \
3852 ((struct ppc_branch_hash_entry *) \
3853 bfd_hash_lookup ((table), (string), (create), (copy)))
3855 /* Create an entry in the stub hash table. */
3857 static struct bfd_hash_entry *
3858 stub_hash_newfunc (struct bfd_hash_entry *entry,
3859 struct bfd_hash_table *table,
3862 /* Allocate the structure if it has not already been allocated by a
3866 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3871 /* Call the allocation method of the superclass. */
3872 entry = bfd_hash_newfunc (entry, table, string);
3875 struct ppc_stub_hash_entry *eh;
3877 /* Initialize the local fields. */
3878 eh = (struct ppc_stub_hash_entry *) entry;
3879 eh->stub_type = ppc_stub_none;
3880 eh->stub_sec = NULL;
3881 eh->stub_offset = 0;
3882 eh->target_value = 0;
3883 eh->target_section = NULL;
3891 /* Create an entry in the branch hash table. */
3893 static struct bfd_hash_entry *
3894 branch_hash_newfunc (struct bfd_hash_entry *entry,
3895 struct bfd_hash_table *table,
3898 /* Allocate the structure if it has not already been allocated by a
3902 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3907 /* Call the allocation method of the superclass. */
3908 entry = bfd_hash_newfunc (entry, table, string);
3911 struct ppc_branch_hash_entry *eh;
3913 /* Initialize the local fields. */
3914 eh = (struct ppc_branch_hash_entry *) entry;
3922 /* Create an entry in a ppc64 ELF linker hash table. */
3924 static struct bfd_hash_entry *
3925 link_hash_newfunc (struct bfd_hash_entry *entry,
3926 struct bfd_hash_table *table,
3929 /* Allocate the structure if it has not already been allocated by a
3933 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3938 /* Call the allocation method of the superclass. */
3939 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3942 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3944 memset (&eh->u.stub_cache, 0,
3945 (sizeof (struct ppc_link_hash_entry)
3946 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3948 /* When making function calls, old ABI code references function entry
3949 points (dot symbols), while new ABI code references the function
3950 descriptor symbol. We need to make any combination of reference and
3951 definition work together, without breaking archive linking.
3953 For a defined function "foo" and an undefined call to "bar":
3954 An old object defines "foo" and ".foo", references ".bar" (possibly
3956 A new object defines "foo" and references "bar".
3958 A new object thus has no problem with its undefined symbols being
3959 satisfied by definitions in an old object. On the other hand, the
3960 old object won't have ".bar" satisfied by a new object.
3962 Keep a list of newly added dot-symbols. */
3964 if (string[0] == '.')
3966 struct ppc_link_hash_table *htab;
3968 htab = (struct ppc_link_hash_table *) table;
3969 eh->u.next_dot_sym = htab->dot_syms;
3970 htab->dot_syms = eh;
3977 struct tocsave_entry {
3983 tocsave_htab_hash (const void *p)
3985 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3986 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
3990 tocsave_htab_eq (const void *p1, const void *p2)
3992 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3993 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3994 return e1->sec == e2->sec && e1->offset == e2->offset;
3997 /* Create a ppc64 ELF linker hash table. */
3999 static struct bfd_link_hash_table *
4000 ppc64_elf_link_hash_table_create (bfd *abfd)
4002 struct ppc_link_hash_table *htab;
4003 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4005 htab = bfd_zmalloc (amt);
4009 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4010 sizeof (struct ppc_link_hash_entry),
4017 /* Init the stub hash table too. */
4018 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4019 sizeof (struct ppc_stub_hash_entry)))
4022 /* And the branch hash table. */
4023 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4024 sizeof (struct ppc_branch_hash_entry)))
4027 htab->tocsave_htab = htab_try_create (1024,
4031 if (htab->tocsave_htab == NULL)
4034 /* Initializing two fields of the union is just cosmetic. We really
4035 only care about glist, but when compiled on a 32-bit host the
4036 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4037 debugger inspection of these fields look nicer. */
4038 htab->elf.init_got_refcount.refcount = 0;
4039 htab->elf.init_got_refcount.glist = NULL;
4040 htab->elf.init_plt_refcount.refcount = 0;
4041 htab->elf.init_plt_refcount.glist = NULL;
4042 htab->elf.init_got_offset.offset = 0;
4043 htab->elf.init_got_offset.glist = NULL;
4044 htab->elf.init_plt_offset.offset = 0;
4045 htab->elf.init_plt_offset.glist = NULL;
4047 return &htab->elf.root;
4050 /* Free the derived linker hash table. */
4053 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4055 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4057 bfd_hash_table_free (&htab->stub_hash_table);
4058 bfd_hash_table_free (&htab->branch_hash_table);
4059 if (htab->tocsave_htab)
4060 htab_delete (htab->tocsave_htab);
4061 _bfd_elf_link_hash_table_free (hash);
4064 /* Create sections for linker generated code. */
4067 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4069 struct ppc_link_hash_table *htab;
4072 htab = ppc_hash_table (info);
4074 /* Create .sfpr for code to save and restore fp regs. */
4075 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4076 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4077 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4079 if (htab->sfpr == NULL
4080 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4083 /* Create .glink for lazy dynamic linking support. */
4084 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4086 if (htab->glink == NULL
4087 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4090 if (!info->no_ld_generated_unwind_info)
4092 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4093 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4094 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4097 if (htab->glink_eh_frame == NULL
4098 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4102 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4103 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4104 if (htab->iplt == NULL
4105 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4108 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4109 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4110 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4113 if (htab->reliplt == NULL
4114 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4117 /* Create branch lookup table for plt_branch stubs. */
4118 flags = (SEC_ALLOC | SEC_LOAD
4119 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4120 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4122 if (htab->brlt == NULL
4123 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4129 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4130 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4131 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4134 if (htab->relbrlt == NULL
4135 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4141 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4144 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4146 struct ppc_link_hash_table *htab;
4148 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4150 /* Always hook our dynamic sections into the first bfd, which is the
4151 linker created stub bfd. This ensures that the GOT header is at
4152 the start of the output TOC section. */
4153 htab = ppc_hash_table (info);
4156 htab->stub_bfd = abfd;
4157 htab->elf.dynobj = abfd;
4159 if (info->relocatable)
4162 return create_linkage_sections (htab->elf.dynobj, info);
4165 /* Build a name for an entry in the stub hash table. */
4168 ppc_stub_name (const asection *input_section,
4169 const asection *sym_sec,
4170 const struct ppc_link_hash_entry *h,
4171 const Elf_Internal_Rela *rel)
4176 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4177 offsets from a sym as a branch target? In fact, we could
4178 probably assume the addend is always zero. */
4179 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4183 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4184 stub_name = bfd_malloc (len);
4185 if (stub_name == NULL)
4188 len = sprintf (stub_name, "%08x.%s+%x",
4189 input_section->id & 0xffffffff,
4190 h->elf.root.root.string,
4191 (int) rel->r_addend & 0xffffffff);
4195 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4196 stub_name = bfd_malloc (len);
4197 if (stub_name == NULL)
4200 len = sprintf (stub_name, "%08x.%x:%x+%x",
4201 input_section->id & 0xffffffff,
4202 sym_sec->id & 0xffffffff,
4203 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4204 (int) rel->r_addend & 0xffffffff);
4206 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4207 stub_name[len - 2] = 0;
4211 /* Look up an entry in the stub hash. Stub entries are cached because
4212 creating the stub name takes a bit of time. */
4214 static struct ppc_stub_hash_entry *
4215 ppc_get_stub_entry (const asection *input_section,
4216 const asection *sym_sec,
4217 struct ppc_link_hash_entry *h,
4218 const Elf_Internal_Rela *rel,
4219 struct ppc_link_hash_table *htab)
4221 struct ppc_stub_hash_entry *stub_entry;
4222 const asection *id_sec;
4224 /* If this input section is part of a group of sections sharing one
4225 stub section, then use the id of the first section in the group.
4226 Stub names need to include a section id, as there may well be
4227 more than one stub used to reach say, printf, and we need to
4228 distinguish between them. */
4229 id_sec = htab->stub_group[input_section->id].link_sec;
4231 if (h != NULL && h->u.stub_cache != NULL
4232 && h->u.stub_cache->h == h
4233 && h->u.stub_cache->id_sec == id_sec)
4235 stub_entry = h->u.stub_cache;
4241 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4242 if (stub_name == NULL)
4245 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4246 stub_name, FALSE, FALSE);
4248 h->u.stub_cache = stub_entry;
4256 /* Add a new stub entry to the stub hash. Not all fields of the new
4257 stub entry are initialised. */
4259 static struct ppc_stub_hash_entry *
4260 ppc_add_stub (const char *stub_name,
4262 struct bfd_link_info *info)
4264 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4267 struct ppc_stub_hash_entry *stub_entry;
4269 link_sec = htab->stub_group[section->id].link_sec;
4270 stub_sec = htab->stub_group[section->id].stub_sec;
4271 if (stub_sec == NULL)
4273 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4274 if (stub_sec == NULL)
4280 namelen = strlen (link_sec->name);
4281 len = namelen + sizeof (STUB_SUFFIX);
4282 s_name = bfd_alloc (htab->stub_bfd, len);
4286 memcpy (s_name, link_sec->name, namelen);
4287 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4288 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4289 if (stub_sec == NULL)
4291 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4293 htab->stub_group[section->id].stub_sec = stub_sec;
4296 /* Enter this entry into the linker stub hash table. */
4297 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4299 if (stub_entry == NULL)
4301 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4302 section->owner, stub_name);
4306 stub_entry->stub_sec = stub_sec;
4307 stub_entry->stub_offset = 0;
4308 stub_entry->id_sec = link_sec;
4312 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4313 not already done. */
4316 create_got_section (bfd *abfd, struct bfd_link_info *info)
4318 asection *got, *relgot;
4320 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4322 if (!is_ppc64_elf (abfd))
4329 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4332 htab->got = bfd_get_linker_section (htab->elf.dynobj, ".got");
4337 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4338 | SEC_LINKER_CREATED);
4340 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4342 || !bfd_set_section_alignment (abfd, got, 3))
4345 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4346 flags | SEC_READONLY);
4348 || ! bfd_set_section_alignment (abfd, relgot, 3))
4351 ppc64_elf_tdata (abfd)->got = got;
4352 ppc64_elf_tdata (abfd)->relgot = relgot;
4356 /* Create the dynamic sections, and set up shortcuts. */
4359 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4361 struct ppc_link_hash_table *htab;
4363 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4366 htab = ppc_hash_table (info);
4371 htab->got = bfd_get_linker_section (dynobj, ".got");
4372 htab->plt = bfd_get_linker_section (dynobj, ".plt");
4373 htab->relplt = bfd_get_linker_section (dynobj, ".rela.plt");
4374 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4376 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4378 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4379 || (!info->shared && !htab->relbss))
4385 /* Follow indirect and warning symbol links. */
4387 static inline struct bfd_link_hash_entry *
4388 follow_link (struct bfd_link_hash_entry *h)
4390 while (h->type == bfd_link_hash_indirect
4391 || h->type == bfd_link_hash_warning)
4396 static inline struct elf_link_hash_entry *
4397 elf_follow_link (struct elf_link_hash_entry *h)
4399 return (struct elf_link_hash_entry *) follow_link (&h->root);
4402 static inline struct ppc_link_hash_entry *
4403 ppc_follow_link (struct ppc_link_hash_entry *h)
4405 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4408 /* Merge PLT info on FROM with that on TO. */
4411 move_plt_plist (struct ppc_link_hash_entry *from,
4412 struct ppc_link_hash_entry *to)
4414 if (from->elf.plt.plist != NULL)
4416 if (to->elf.plt.plist != NULL)
4418 struct plt_entry **entp;
4419 struct plt_entry *ent;
4421 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4423 struct plt_entry *dent;
4425 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4426 if (dent->addend == ent->addend)
4428 dent->plt.refcount += ent->plt.refcount;
4435 *entp = to->elf.plt.plist;
4438 to->elf.plt.plist = from->elf.plt.plist;
4439 from->elf.plt.plist = NULL;
4443 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4446 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4447 struct elf_link_hash_entry *dir,
4448 struct elf_link_hash_entry *ind)
4450 struct ppc_link_hash_entry *edir, *eind;
4452 edir = (struct ppc_link_hash_entry *) dir;
4453 eind = (struct ppc_link_hash_entry *) ind;
4455 edir->is_func |= eind->is_func;
4456 edir->is_func_descriptor |= eind->is_func_descriptor;
4457 edir->tls_mask |= eind->tls_mask;
4458 if (eind->oh != NULL)
4459 edir->oh = ppc_follow_link (eind->oh);
4461 /* If called to transfer flags for a weakdef during processing
4462 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4463 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4464 if (!(ELIMINATE_COPY_RELOCS
4465 && eind->elf.root.type != bfd_link_hash_indirect
4466 && edir->elf.dynamic_adjusted))
4467 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4469 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4470 edir->elf.ref_regular |= eind->elf.ref_regular;
4471 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4472 edir->elf.needs_plt |= eind->elf.needs_plt;
4474 /* Copy over any dynamic relocs we may have on the indirect sym. */
4475 if (eind->dyn_relocs != NULL)
4477 if (edir->dyn_relocs != NULL)
4479 struct elf_dyn_relocs **pp;
4480 struct elf_dyn_relocs *p;
4482 /* Add reloc counts against the indirect sym to the direct sym
4483 list. Merge any entries against the same section. */
4484 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4486 struct elf_dyn_relocs *q;
4488 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4489 if (q->sec == p->sec)
4491 q->pc_count += p->pc_count;
4492 q->count += p->count;
4499 *pp = edir->dyn_relocs;
4502 edir->dyn_relocs = eind->dyn_relocs;
4503 eind->dyn_relocs = NULL;
4506 /* If we were called to copy over info for a weak sym, that's all.
4507 You might think dyn_relocs need not be copied over; After all,
4508 both syms will be dynamic or both non-dynamic so we're just
4509 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4510 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4511 dyn_relocs in read-only sections, and it does so on what is the
4513 if (eind->elf.root.type != bfd_link_hash_indirect)
4516 /* Copy over got entries that we may have already seen to the
4517 symbol which just became indirect. */
4518 if (eind->elf.got.glist != NULL)
4520 if (edir->elf.got.glist != NULL)
4522 struct got_entry **entp;
4523 struct got_entry *ent;
4525 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4527 struct got_entry *dent;
4529 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4530 if (dent->addend == ent->addend
4531 && dent->owner == ent->owner
4532 && dent->tls_type == ent->tls_type)
4534 dent->got.refcount += ent->got.refcount;
4541 *entp = edir->elf.got.glist;
4544 edir->elf.got.glist = eind->elf.got.glist;
4545 eind->elf.got.glist = NULL;
4548 /* And plt entries. */
4549 move_plt_plist (eind, edir);
4551 if (eind->elf.dynindx != -1)
4553 if (edir->elf.dynindx != -1)
4554 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4555 edir->elf.dynstr_index);
4556 edir->elf.dynindx = eind->elf.dynindx;
4557 edir->elf.dynstr_index = eind->elf.dynstr_index;
4558 eind->elf.dynindx = -1;
4559 eind->elf.dynstr_index = 0;
4563 /* Find the function descriptor hash entry from the given function code
4564 hash entry FH. Link the entries via their OH fields. */
4566 static struct ppc_link_hash_entry *
4567 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4569 struct ppc_link_hash_entry *fdh = fh->oh;
4573 const char *fd_name = fh->elf.root.root.string + 1;
4575 fdh = (struct ppc_link_hash_entry *)
4576 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4580 fdh->is_func_descriptor = 1;
4586 return ppc_follow_link (fdh);
4589 /* Make a fake function descriptor sym for the code sym FH. */
4591 static struct ppc_link_hash_entry *
4592 make_fdh (struct bfd_link_info *info,
4593 struct ppc_link_hash_entry *fh)
4597 struct bfd_link_hash_entry *bh;
4598 struct ppc_link_hash_entry *fdh;
4600 abfd = fh->elf.root.u.undef.abfd;
4601 newsym = bfd_make_empty_symbol (abfd);
4602 newsym->name = fh->elf.root.root.string + 1;
4603 newsym->section = bfd_und_section_ptr;
4605 newsym->flags = BSF_WEAK;
4608 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4609 newsym->flags, newsym->section,
4610 newsym->value, NULL, FALSE, FALSE,
4614 fdh = (struct ppc_link_hash_entry *) bh;
4615 fdh->elf.non_elf = 0;
4617 fdh->is_func_descriptor = 1;
4624 /* Fix function descriptor symbols defined in .opd sections to be
4628 ppc64_elf_add_symbol_hook (bfd *ibfd,
4629 struct bfd_link_info *info,
4630 Elf_Internal_Sym *isym,
4631 const char **name ATTRIBUTE_UNUSED,
4632 flagword *flags ATTRIBUTE_UNUSED,
4634 bfd_vma *value ATTRIBUTE_UNUSED)
4636 if ((ibfd->flags & DYNAMIC) == 0
4637 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4638 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4640 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4642 if ((ibfd->flags & DYNAMIC) == 0)
4643 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4645 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4647 else if (*sec != NULL
4648 && strcmp ((*sec)->name, ".opd") == 0)
4649 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4654 /* This function makes an old ABI object reference to ".bar" cause the
4655 inclusion of a new ABI object archive that defines "bar".
4656 NAME is a symbol defined in an archive. Return a symbol in the hash
4657 table that might be satisfied by the archive symbols. */
4659 static struct elf_link_hash_entry *
4660 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4661 struct bfd_link_info *info,
4664 struct elf_link_hash_entry *h;
4668 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4670 /* Don't return this sym if it is a fake function descriptor
4671 created by add_symbol_adjust. */
4672 && !(h->root.type == bfd_link_hash_undefweak
4673 && ((struct ppc_link_hash_entry *) h)->fake))
4679 len = strlen (name);
4680 dot_name = bfd_alloc (abfd, len + 2);
4681 if (dot_name == NULL)
4682 return (struct elf_link_hash_entry *) 0 - 1;
4684 memcpy (dot_name + 1, name, len + 1);
4685 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4686 bfd_release (abfd, dot_name);
4690 /* This function satisfies all old ABI object references to ".bar" if a
4691 new ABI object defines "bar". Well, at least, undefined dot symbols
4692 are made weak. This stops later archive searches from including an
4693 object if we already have a function descriptor definition. It also
4694 prevents the linker complaining about undefined symbols.
4695 We also check and correct mismatched symbol visibility here. The
4696 most restrictive visibility of the function descriptor and the
4697 function entry symbol is used. */
4700 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4702 struct ppc_link_hash_table *htab;
4703 struct ppc_link_hash_entry *fdh;
4705 if (eh->elf.root.type == bfd_link_hash_indirect)
4708 if (eh->elf.root.type == bfd_link_hash_warning)
4709 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4711 if (eh->elf.root.root.string[0] != '.')
4714 htab = ppc_hash_table (info);
4718 fdh = lookup_fdh (eh, htab);
4721 if (!info->relocatable
4722 && (eh->elf.root.type == bfd_link_hash_undefined
4723 || eh->elf.root.type == bfd_link_hash_undefweak)
4724 && eh->elf.ref_regular)
4726 /* Make an undefweak function descriptor sym, which is enough to
4727 pull in an --as-needed shared lib, but won't cause link
4728 errors. Archives are handled elsewhere. */
4729 fdh = make_fdh (info, eh);
4732 fdh->elf.ref_regular = 1;
4737 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4738 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4739 if (entry_vis < descr_vis)
4740 fdh->elf.other += entry_vis - descr_vis;
4741 else if (entry_vis > descr_vis)
4742 eh->elf.other += descr_vis - entry_vis;
4744 if ((fdh->elf.root.type == bfd_link_hash_defined
4745 || fdh->elf.root.type == bfd_link_hash_defweak)
4746 && eh->elf.root.type == bfd_link_hash_undefined)
4748 eh->elf.root.type = bfd_link_hash_undefweak;
4749 eh->was_undefined = 1;
4750 htab->twiddled_syms = 1;
4757 /* Process list of dot-symbols we made in link_hash_newfunc. */
4760 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4762 struct ppc_link_hash_table *htab;
4763 struct ppc_link_hash_entry **p, *eh;
4765 if (!is_ppc64_elf (info->output_bfd))
4767 htab = ppc_hash_table (info);
4771 if (is_ppc64_elf (ibfd))
4773 p = &htab->dot_syms;
4774 while ((eh = *p) != NULL)
4777 if (!add_symbol_adjust (eh, info))
4779 p = &eh->u.next_dot_sym;
4783 /* Clear the list for non-ppc64 input files. */
4784 p = &htab->dot_syms;
4785 while ((eh = *p) != NULL)
4788 p = &eh->u.next_dot_sym;
4791 /* We need to fix the undefs list for any syms we have twiddled to
4793 if (htab->twiddled_syms)
4795 bfd_link_repair_undef_list (&htab->elf.root);
4796 htab->twiddled_syms = 0;
4801 /* Undo hash table changes when an --as-needed input file is determined
4802 not to be needed. */
4805 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4806 struct bfd_link_info *info)
4808 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4813 htab->dot_syms = NULL;
4817 /* If --just-symbols against a final linked binary, then assume we need
4818 toc adjusting stubs when calling functions defined there. */
4821 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4823 if ((sec->flags & SEC_CODE) != 0
4824 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4825 && is_ppc64_elf (sec->owner))
4827 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4829 && got->size >= elf_backend_got_header_size
4830 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4831 sec->has_toc_reloc = 1;
4833 _bfd_elf_link_just_syms (sec, info);
4836 static struct plt_entry **
4837 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4838 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4840 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4841 struct plt_entry **local_plt;
4842 unsigned char *local_got_tls_masks;
4844 if (local_got_ents == NULL)
4846 bfd_size_type size = symtab_hdr->sh_info;
4848 size *= (sizeof (*local_got_ents)
4849 + sizeof (*local_plt)
4850 + sizeof (*local_got_tls_masks));
4851 local_got_ents = bfd_zalloc (abfd, size);
4852 if (local_got_ents == NULL)
4854 elf_local_got_ents (abfd) = local_got_ents;
4857 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4859 struct got_entry *ent;
4861 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4862 if (ent->addend == r_addend
4863 && ent->owner == abfd
4864 && ent->tls_type == tls_type)
4868 bfd_size_type amt = sizeof (*ent);
4869 ent = bfd_alloc (abfd, amt);
4872 ent->next = local_got_ents[r_symndx];
4873 ent->addend = r_addend;
4875 ent->tls_type = tls_type;
4876 ent->is_indirect = FALSE;
4877 ent->got.refcount = 0;
4878 local_got_ents[r_symndx] = ent;
4880 ent->got.refcount += 1;
4883 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4884 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4885 local_got_tls_masks[r_symndx] |= tls_type;
4887 return local_plt + r_symndx;
4891 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4893 struct plt_entry *ent;
4895 for (ent = *plist; ent != NULL; ent = ent->next)
4896 if (ent->addend == addend)
4900 bfd_size_type amt = sizeof (*ent);
4901 ent = bfd_alloc (abfd, amt);
4905 ent->addend = addend;
4906 ent->plt.refcount = 0;
4909 ent->plt.refcount += 1;
4914 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4916 return (r_type == R_PPC64_REL24
4917 || r_type == R_PPC64_REL14
4918 || r_type == R_PPC64_REL14_BRTAKEN
4919 || r_type == R_PPC64_REL14_BRNTAKEN
4920 || r_type == R_PPC64_ADDR24
4921 || r_type == R_PPC64_ADDR14
4922 || r_type == R_PPC64_ADDR14_BRTAKEN
4923 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4926 /* Look through the relocs for a section during the first phase, and
4927 calculate needed space in the global offset table, procedure
4928 linkage table, and dynamic reloc sections. */
4931 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4932 asection *sec, const Elf_Internal_Rela *relocs)
4934 struct ppc_link_hash_table *htab;
4935 Elf_Internal_Shdr *symtab_hdr;
4936 struct elf_link_hash_entry **sym_hashes;
4937 const Elf_Internal_Rela *rel;
4938 const Elf_Internal_Rela *rel_end;
4940 asection **opd_sym_map;
4941 struct elf_link_hash_entry *tga, *dottga;
4943 if (info->relocatable)
4946 /* Don't do anything special with non-loaded, non-alloced sections.
4947 In particular, any relocs in such sections should not affect GOT
4948 and PLT reference counting (ie. we don't allow them to create GOT
4949 or PLT entries), there's no possibility or desire to optimize TLS
4950 relocs, and there's not much point in propagating relocs to shared
4951 libs that the dynamic linker won't relocate. */
4952 if ((sec->flags & SEC_ALLOC) == 0)
4955 BFD_ASSERT (is_ppc64_elf (abfd));
4957 htab = ppc_hash_table (info);
4961 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4962 FALSE, FALSE, TRUE);
4963 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4964 FALSE, FALSE, TRUE);
4965 symtab_hdr = &elf_symtab_hdr (abfd);
4966 sym_hashes = elf_sym_hashes (abfd);
4969 if (strcmp (sec->name, ".opd") == 0)
4971 /* Garbage collection needs some extra help with .opd sections.
4972 We don't want to necessarily keep everything referenced by
4973 relocs in .opd, as that would keep all functions. Instead,
4974 if we reference an .opd symbol (a function descriptor), we
4975 want to keep the function code symbol's section. This is
4976 easy for global symbols, but for local syms we need to keep
4977 information about the associated function section. */
4980 amt = sec->size * sizeof (*opd_sym_map) / 8;
4981 opd_sym_map = bfd_zalloc (abfd, amt);
4982 if (opd_sym_map == NULL)
4984 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4985 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4986 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4989 rel_end = relocs + sec->reloc_count;
4990 for (rel = relocs; rel < rel_end; rel++)
4992 unsigned long r_symndx;
4993 struct elf_link_hash_entry *h;
4994 enum elf_ppc64_reloc_type r_type;
4996 struct _ppc64_elf_section_data *ppc64_sec;
4997 struct plt_entry **ifunc;
4999 r_symndx = ELF64_R_SYM (rel->r_info);
5000 if (r_symndx < symtab_hdr->sh_info)
5004 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5005 h = elf_follow_link (h);
5007 /* PR15323, ref flags aren't set for references in the same
5009 h->root.non_ir_ref = 1;
5016 if (h->type == STT_GNU_IFUNC)
5019 ifunc = &h->plt.plist;
5024 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5029 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5031 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5032 rel->r_addend, PLT_IFUNC);
5037 r_type = ELF64_R_TYPE (rel->r_info);
5038 if (is_branch_reloc (r_type))
5040 if (h != NULL && (h == tga || h == dottga))
5043 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5044 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5045 /* We have a new-style __tls_get_addr call with a marker
5049 /* Mark this section as having an old-style call. */
5050 sec->has_tls_get_addr_call = 1;
5053 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5055 && !update_plt_info (abfd, ifunc, rel->r_addend))
5063 /* These special tls relocs tie a call to __tls_get_addr with
5064 its parameter symbol. */
5067 case R_PPC64_GOT_TLSLD16:
5068 case R_PPC64_GOT_TLSLD16_LO:
5069 case R_PPC64_GOT_TLSLD16_HI:
5070 case R_PPC64_GOT_TLSLD16_HA:
5071 tls_type = TLS_TLS | TLS_LD;
5074 case R_PPC64_GOT_TLSGD16:
5075 case R_PPC64_GOT_TLSGD16_LO:
5076 case R_PPC64_GOT_TLSGD16_HI:
5077 case R_PPC64_GOT_TLSGD16_HA:
5078 tls_type = TLS_TLS | TLS_GD;
5081 case R_PPC64_GOT_TPREL16_DS:
5082 case R_PPC64_GOT_TPREL16_LO_DS:
5083 case R_PPC64_GOT_TPREL16_HI:
5084 case R_PPC64_GOT_TPREL16_HA:
5085 if (!info->executable)
5086 info->flags |= DF_STATIC_TLS;
5087 tls_type = TLS_TLS | TLS_TPREL;
5090 case R_PPC64_GOT_DTPREL16_DS:
5091 case R_PPC64_GOT_DTPREL16_LO_DS:
5092 case R_PPC64_GOT_DTPREL16_HI:
5093 case R_PPC64_GOT_DTPREL16_HA:
5094 tls_type = TLS_TLS | TLS_DTPREL;
5096 sec->has_tls_reloc = 1;
5100 case R_PPC64_GOT16_DS:
5101 case R_PPC64_GOT16_HA:
5102 case R_PPC64_GOT16_HI:
5103 case R_PPC64_GOT16_LO:
5104 case R_PPC64_GOT16_LO_DS:
5105 /* This symbol requires a global offset table entry. */
5106 sec->has_toc_reloc = 1;
5107 if (r_type == R_PPC64_GOT_TLSLD16
5108 || r_type == R_PPC64_GOT_TLSGD16
5109 || r_type == R_PPC64_GOT_TPREL16_DS
5110 || r_type == R_PPC64_GOT_DTPREL16_DS
5111 || r_type == R_PPC64_GOT16
5112 || r_type == R_PPC64_GOT16_DS)
5114 htab->do_multi_toc = 1;
5115 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5118 if (ppc64_elf_tdata (abfd)->got == NULL
5119 && !create_got_section (abfd, info))
5124 struct ppc_link_hash_entry *eh;
5125 struct got_entry *ent;
5127 eh = (struct ppc_link_hash_entry *) h;
5128 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5129 if (ent->addend == rel->r_addend
5130 && ent->owner == abfd
5131 && ent->tls_type == tls_type)
5135 bfd_size_type amt = sizeof (*ent);
5136 ent = bfd_alloc (abfd, amt);
5139 ent->next = eh->elf.got.glist;
5140 ent->addend = rel->r_addend;
5142 ent->tls_type = tls_type;
5143 ent->is_indirect = FALSE;
5144 ent->got.refcount = 0;
5145 eh->elf.got.glist = ent;
5147 ent->got.refcount += 1;
5148 eh->tls_mask |= tls_type;
5151 /* This is a global offset table entry for a local symbol. */
5152 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5153 rel->r_addend, tls_type))
5157 case R_PPC64_PLT16_HA:
5158 case R_PPC64_PLT16_HI:
5159 case R_PPC64_PLT16_LO:
5162 /* This symbol requires a procedure linkage table entry. We
5163 actually build the entry in adjust_dynamic_symbol,
5164 because this might be a case of linking PIC code without
5165 linking in any dynamic objects, in which case we don't
5166 need to generate a procedure linkage table after all. */
5169 /* It does not make sense to have a procedure linkage
5170 table entry for a local symbol. */
5171 bfd_set_error (bfd_error_bad_value);
5176 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5179 if (h->root.root.string[0] == '.'
5180 && h->root.root.string[1] != '\0')
5181 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5185 /* The following relocations don't need to propagate the
5186 relocation if linking a shared object since they are
5187 section relative. */
5188 case R_PPC64_SECTOFF:
5189 case R_PPC64_SECTOFF_LO:
5190 case R_PPC64_SECTOFF_HI:
5191 case R_PPC64_SECTOFF_HA:
5192 case R_PPC64_SECTOFF_DS:
5193 case R_PPC64_SECTOFF_LO_DS:
5194 case R_PPC64_DTPREL16:
5195 case R_PPC64_DTPREL16_LO:
5196 case R_PPC64_DTPREL16_HI:
5197 case R_PPC64_DTPREL16_HA:
5198 case R_PPC64_DTPREL16_DS:
5199 case R_PPC64_DTPREL16_LO_DS:
5200 case R_PPC64_DTPREL16_HIGHER:
5201 case R_PPC64_DTPREL16_HIGHERA:
5202 case R_PPC64_DTPREL16_HIGHEST:
5203 case R_PPC64_DTPREL16_HIGHESTA:
5208 case R_PPC64_REL16_LO:
5209 case R_PPC64_REL16_HI:
5210 case R_PPC64_REL16_HA:
5214 case R_PPC64_TOC16_DS:
5215 htab->do_multi_toc = 1;
5216 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5217 case R_PPC64_TOC16_LO:
5218 case R_PPC64_TOC16_HI:
5219 case R_PPC64_TOC16_HA:
5220 case R_PPC64_TOC16_LO_DS:
5221 sec->has_toc_reloc = 1;
5224 /* This relocation describes the C++ object vtable hierarchy.
5225 Reconstruct it for later use during GC. */
5226 case R_PPC64_GNU_VTINHERIT:
5227 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5231 /* This relocation describes which C++ vtable entries are actually
5232 used. Record for later use during GC. */
5233 case R_PPC64_GNU_VTENTRY:
5234 BFD_ASSERT (h != NULL);
5236 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5241 case R_PPC64_REL14_BRTAKEN:
5242 case R_PPC64_REL14_BRNTAKEN:
5244 asection *dest = NULL;
5246 /* Heuristic: If jumping outside our section, chances are
5247 we are going to need a stub. */
5250 /* If the sym is weak it may be overridden later, so
5251 don't assume we know where a weak sym lives. */
5252 if (h->root.type == bfd_link_hash_defined)
5253 dest = h->root.u.def.section;
5257 Elf_Internal_Sym *isym;
5259 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5264 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5268 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5273 if (h != NULL && ifunc == NULL)
5275 /* We may need a .plt entry if the function this reloc
5276 refers to is in a shared lib. */
5277 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5280 if (h->root.root.string[0] == '.'
5281 && h->root.root.string[1] != '\0')
5282 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5283 if (h == tga || h == dottga)
5284 sec->has_tls_reloc = 1;
5288 case R_PPC64_TPREL64:
5289 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5290 if (!info->executable)
5291 info->flags |= DF_STATIC_TLS;
5294 case R_PPC64_DTPMOD64:
5295 if (rel + 1 < rel_end
5296 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5297 && rel[1].r_offset == rel->r_offset + 8)
5298 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5300 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5303 case R_PPC64_DTPREL64:
5304 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5306 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5307 && rel[-1].r_offset == rel->r_offset - 8)
5308 /* This is the second reloc of a dtpmod, dtprel pair.
5309 Don't mark with TLS_DTPREL. */
5313 sec->has_tls_reloc = 1;
5316 struct ppc_link_hash_entry *eh;
5317 eh = (struct ppc_link_hash_entry *) h;
5318 eh->tls_mask |= tls_type;
5321 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5322 rel->r_addend, tls_type))
5325 ppc64_sec = ppc64_elf_section_data (sec);
5326 if (ppc64_sec->sec_type != sec_toc)
5330 /* One extra to simplify get_tls_mask. */
5331 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5332 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5333 if (ppc64_sec->u.toc.symndx == NULL)
5335 amt = sec->size * sizeof (bfd_vma) / 8;
5336 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5337 if (ppc64_sec->u.toc.add == NULL)
5339 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5340 ppc64_sec->sec_type = sec_toc;
5342 BFD_ASSERT (rel->r_offset % 8 == 0);
5343 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5344 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5346 /* Mark the second slot of a GD or LD entry.
5347 -1 to indicate GD and -2 to indicate LD. */
5348 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5349 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5350 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5351 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5354 case R_PPC64_TPREL16:
5355 case R_PPC64_TPREL16_LO:
5356 case R_PPC64_TPREL16_HI:
5357 case R_PPC64_TPREL16_HA:
5358 case R_PPC64_TPREL16_DS:
5359 case R_PPC64_TPREL16_LO_DS:
5360 case R_PPC64_TPREL16_HIGHER:
5361 case R_PPC64_TPREL16_HIGHERA:
5362 case R_PPC64_TPREL16_HIGHEST:
5363 case R_PPC64_TPREL16_HIGHESTA:
5366 if (!info->executable)
5367 info->flags |= DF_STATIC_TLS;
5372 case R_PPC64_ADDR64:
5373 if (opd_sym_map != NULL
5374 && rel + 1 < rel_end
5375 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5379 if (h->root.root.string[0] == '.'
5380 && h->root.root.string[1] != 0
5381 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5384 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5389 Elf_Internal_Sym *isym;
5391 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5396 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5397 if (s != NULL && s != sec)
5398 opd_sym_map[rel->r_offset / 8] = s;
5406 case R_PPC64_ADDR14:
5407 case R_PPC64_ADDR14_BRNTAKEN:
5408 case R_PPC64_ADDR14_BRTAKEN:
5409 case R_PPC64_ADDR16:
5410 case R_PPC64_ADDR16_DS:
5411 case R_PPC64_ADDR16_HA:
5412 case R_PPC64_ADDR16_HI:
5413 case R_PPC64_ADDR16_HIGHER:
5414 case R_PPC64_ADDR16_HIGHERA:
5415 case R_PPC64_ADDR16_HIGHEST:
5416 case R_PPC64_ADDR16_HIGHESTA:
5417 case R_PPC64_ADDR16_LO:
5418 case R_PPC64_ADDR16_LO_DS:
5419 case R_PPC64_ADDR24:
5420 case R_PPC64_ADDR32:
5421 case R_PPC64_UADDR16:
5422 case R_PPC64_UADDR32:
5423 case R_PPC64_UADDR64:
5425 if (h != NULL && !info->shared)
5426 /* We may need a copy reloc. */
5429 /* Don't propagate .opd relocs. */
5430 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5433 /* If we are creating a shared library, and this is a reloc
5434 against a global symbol, or a non PC relative reloc
5435 against a local symbol, then we need to copy the reloc
5436 into the shared library. However, if we are linking with
5437 -Bsymbolic, we do not need to copy a reloc against a
5438 global symbol which is defined in an object we are
5439 including in the link (i.e., DEF_REGULAR is set). At
5440 this point we have not seen all the input files, so it is
5441 possible that DEF_REGULAR is not set now but will be set
5442 later (it is never cleared). In case of a weak definition,
5443 DEF_REGULAR may be cleared later by a strong definition in
5444 a shared library. We account for that possibility below by
5445 storing information in the dyn_relocs field of the hash
5446 table entry. A similar situation occurs when creating
5447 shared libraries and symbol visibility changes render the
5450 If on the other hand, we are creating an executable, we
5451 may need to keep relocations for symbols satisfied by a
5452 dynamic library if we manage to avoid copy relocs for the
5456 && (must_be_dyn_reloc (info, r_type)
5458 && (!SYMBOLIC_BIND (info, h)
5459 || h->root.type == bfd_link_hash_defweak
5460 || !h->def_regular))))
5461 || (ELIMINATE_COPY_RELOCS
5464 && (h->root.type == bfd_link_hash_defweak
5465 || !h->def_regular))
5469 /* We must copy these reloc types into the output file.
5470 Create a reloc section in dynobj and make room for
5474 sreloc = _bfd_elf_make_dynamic_reloc_section
5475 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5481 /* If this is a global symbol, we count the number of
5482 relocations we need for this symbol. */
5485 struct elf_dyn_relocs *p;
5486 struct elf_dyn_relocs **head;
5488 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5490 if (p == NULL || p->sec != sec)
5492 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5502 if (!must_be_dyn_reloc (info, r_type))
5507 /* Track dynamic relocs needed for local syms too.
5508 We really need local syms available to do this
5510 struct ppc_dyn_relocs *p;
5511 struct ppc_dyn_relocs **head;
5512 bfd_boolean is_ifunc;
5515 Elf_Internal_Sym *isym;
5517 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5522 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5526 vpp = &elf_section_data (s)->local_dynrel;
5527 head = (struct ppc_dyn_relocs **) vpp;
5528 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5530 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5532 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5534 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5540 p->ifunc = is_ifunc;
5556 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5557 of the code entry point, and its section. */
5560 opd_entry_value (asection *opd_sec,
5562 asection **code_sec,
5564 bfd_boolean in_code_sec)
5566 bfd *opd_bfd = opd_sec->owner;
5567 Elf_Internal_Rela *relocs;
5568 Elf_Internal_Rela *lo, *hi, *look;
5571 /* No relocs implies we are linking a --just-symbols object, or looking
5572 at a final linked executable with addr2line or somesuch. */
5573 if (opd_sec->reloc_count == 0)
5577 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5578 return (bfd_vma) -1;
5580 val = bfd_get_64 (opd_bfd, buf);
5581 if (code_sec != NULL)
5583 asection *sec, *likely = NULL;
5589 && val < sec->vma + sec->size)
5595 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5597 && (sec->flags & SEC_LOAD) != 0
5598 && (sec->flags & SEC_ALLOC) != 0)
5603 if (code_off != NULL)
5604 *code_off = val - likely->vma;
5610 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5612 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5614 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5616 /* Go find the opd reloc at the sym address. */
5618 BFD_ASSERT (lo != NULL);
5619 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5623 look = lo + (hi - lo) / 2;
5624 if (look->r_offset < offset)
5626 else if (look->r_offset > offset)
5630 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5632 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5633 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5635 unsigned long symndx = ELF64_R_SYM (look->r_info);
5638 if (symndx < symtab_hdr->sh_info
5639 || elf_sym_hashes (opd_bfd) == NULL)
5641 Elf_Internal_Sym *sym;
5643 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5646 size_t symcnt = symtab_hdr->sh_info;
5647 if (elf_sym_hashes (opd_bfd) == NULL)
5648 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5649 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5650 0, NULL, NULL, NULL);
5653 symtab_hdr->contents = (bfd_byte *) sym;
5657 val = sym->st_value;
5658 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5659 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5663 struct elf_link_hash_entry **sym_hashes;
5664 struct elf_link_hash_entry *rh;
5666 sym_hashes = elf_sym_hashes (opd_bfd);
5667 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5670 rh = elf_follow_link (rh);
5671 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5672 || rh->root.type == bfd_link_hash_defweak);
5673 val = rh->root.u.def.value;
5674 sec = rh->root.u.def.section;
5678 /* Handle the odd case where we can be called
5679 during bfd_elf_link_add_symbols before the
5680 symbol hashes have been fully populated. */
5681 Elf_Internal_Sym *sym;
5683 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
5684 symndx, NULL, NULL, NULL);
5688 val = sym->st_value;
5689 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5693 val += look->r_addend;
5694 if (code_off != NULL)
5696 if (code_sec != NULL)
5698 if (in_code_sec && *code_sec != sec)
5703 if (sec != NULL && sec->output_section != NULL)
5704 val += sec->output_section->vma + sec->output_offset;
5713 /* If the ELF symbol SYM might be a function in SEC, return the
5714 function size and set *CODE_OFF to the function's entry point,
5715 otherwise return zero. */
5717 static bfd_size_type
5718 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
5723 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
5724 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
5728 if (!(sym->flags & BSF_SYNTHETIC))
5729 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
5731 if (strcmp (sym->section->name, ".opd") == 0)
5733 if (opd_entry_value (sym->section, sym->value,
5734 &sec, code_off, TRUE) == (bfd_vma) -1)
5736 /* An old ABI binary with dot-syms has a size of 24 on the .opd
5737 symbol. This size has nothing to do with the code size of the
5738 function, which is what we're supposed to return, but the
5739 code size isn't available without looking up the dot-sym.
5740 However, doing that would be a waste of time particularly
5741 since elf_find_function will look at the dot-sym anyway.
5742 Now, elf_find_function will keep the largest size of any
5743 function sym found at the code address of interest, so return
5744 1 here to avoid it incorrectly caching a larger function size
5745 for a small function. This does mean we return the wrong
5746 size for a new-ABI function of size 24, but all that does is
5747 disable caching for such functions. */
5753 if (sym->section != sec)
5755 *code_off = sym->value;
5762 /* Return true if symbol is defined in a regular object file. */
5765 is_static_defined (struct elf_link_hash_entry *h)
5767 return ((h->root.type == bfd_link_hash_defined
5768 || h->root.type == bfd_link_hash_defweak)
5769 && h->root.u.def.section != NULL
5770 && h->root.u.def.section->output_section != NULL);
5773 /* If FDH is a function descriptor symbol, return the associated code
5774 entry symbol if it is defined. Return NULL otherwise. */
5776 static struct ppc_link_hash_entry *
5777 defined_code_entry (struct ppc_link_hash_entry *fdh)
5779 if (fdh->is_func_descriptor)
5781 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5782 if (fh->elf.root.type == bfd_link_hash_defined
5783 || fh->elf.root.type == bfd_link_hash_defweak)
5789 /* If FH is a function code entry symbol, return the associated
5790 function descriptor symbol if it is defined. Return NULL otherwise. */
5792 static struct ppc_link_hash_entry *
5793 defined_func_desc (struct ppc_link_hash_entry *fh)
5796 && fh->oh->is_func_descriptor)
5798 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5799 if (fdh->elf.root.type == bfd_link_hash_defined
5800 || fdh->elf.root.type == bfd_link_hash_defweak)
5806 /* Mark all our entry sym sections, both opd and code section. */
5809 ppc64_elf_gc_keep (struct bfd_link_info *info)
5811 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5812 struct bfd_sym_chain *sym;
5817 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5819 struct ppc_link_hash_entry *eh, *fh;
5822 eh = (struct ppc_link_hash_entry *)
5823 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5826 if (eh->elf.root.type != bfd_link_hash_defined
5827 && eh->elf.root.type != bfd_link_hash_defweak)
5830 fh = defined_code_entry (eh);
5833 sec = fh->elf.root.u.def.section;
5834 sec->flags |= SEC_KEEP;
5836 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5837 && opd_entry_value (eh->elf.root.u.def.section,
5838 eh->elf.root.u.def.value,
5839 &sec, NULL, FALSE) != (bfd_vma) -1)
5840 sec->flags |= SEC_KEEP;
5842 sec = eh->elf.root.u.def.section;
5843 sec->flags |= SEC_KEEP;
5847 /* Mark sections containing dynamically referenced symbols. When
5848 building shared libraries, we must assume that any visible symbol is
5852 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5854 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5855 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5856 struct ppc_link_hash_entry *fdh;
5858 /* Dynamic linking info is on the func descriptor sym. */
5859 fdh = defined_func_desc (eh);
5863 if ((eh->elf.root.type == bfd_link_hash_defined
5864 || eh->elf.root.type == bfd_link_hash_defweak)
5865 && (eh->elf.ref_dynamic
5866 || (!info->executable
5867 && eh->elf.def_regular
5868 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5869 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5870 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5871 || !bfd_hide_sym_by_version (info->version_info,
5872 eh->elf.root.root.string)))))
5875 struct ppc_link_hash_entry *fh;
5877 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5879 /* Function descriptor syms cause the associated
5880 function code sym section to be marked. */
5881 fh = defined_code_entry (eh);
5884 code_sec = fh->elf.root.u.def.section;
5885 code_sec->flags |= SEC_KEEP;
5887 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5888 && opd_entry_value (eh->elf.root.u.def.section,
5889 eh->elf.root.u.def.value,
5890 &code_sec, NULL, FALSE) != (bfd_vma) -1)
5891 code_sec->flags |= SEC_KEEP;
5897 /* Return the section that should be marked against GC for a given
5901 ppc64_elf_gc_mark_hook (asection *sec,
5902 struct bfd_link_info *info,
5903 Elf_Internal_Rela *rel,
5904 struct elf_link_hash_entry *h,
5905 Elf_Internal_Sym *sym)
5909 /* Syms return NULL if we're marking .opd, so we avoid marking all
5910 function sections, as all functions are referenced in .opd. */
5912 if (get_opd_info (sec) != NULL)
5917 enum elf_ppc64_reloc_type r_type;
5918 struct ppc_link_hash_entry *eh, *fh, *fdh;
5920 r_type = ELF64_R_TYPE (rel->r_info);
5923 case R_PPC64_GNU_VTINHERIT:
5924 case R_PPC64_GNU_VTENTRY:
5928 switch (h->root.type)
5930 case bfd_link_hash_defined:
5931 case bfd_link_hash_defweak:
5932 eh = (struct ppc_link_hash_entry *) h;
5933 fdh = defined_func_desc (eh);
5937 /* Function descriptor syms cause the associated
5938 function code sym section to be marked. */
5939 fh = defined_code_entry (eh);
5942 /* They also mark their opd section. */
5943 eh->elf.root.u.def.section->gc_mark = 1;
5945 rsec = fh->elf.root.u.def.section;
5947 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5948 && opd_entry_value (eh->elf.root.u.def.section,
5949 eh->elf.root.u.def.value,
5950 &rsec, NULL, FALSE) != (bfd_vma) -1)
5951 eh->elf.root.u.def.section->gc_mark = 1;
5953 rsec = h->root.u.def.section;
5956 case bfd_link_hash_common:
5957 rsec = h->root.u.c.p->section;
5961 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5967 struct _opd_sec_data *opd;
5969 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5970 opd = get_opd_info (rsec);
5971 if (opd != NULL && opd->func_sec != NULL)
5975 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5982 /* Update the .got, .plt. and dynamic reloc reference counts for the
5983 section being removed. */
5986 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5987 asection *sec, const Elf_Internal_Rela *relocs)
5989 struct ppc_link_hash_table *htab;
5990 Elf_Internal_Shdr *symtab_hdr;
5991 struct elf_link_hash_entry **sym_hashes;
5992 struct got_entry **local_got_ents;
5993 const Elf_Internal_Rela *rel, *relend;
5995 if (info->relocatable)
5998 if ((sec->flags & SEC_ALLOC) == 0)
6001 elf_section_data (sec)->local_dynrel = NULL;
6003 htab = ppc_hash_table (info);
6007 symtab_hdr = &elf_symtab_hdr (abfd);
6008 sym_hashes = elf_sym_hashes (abfd);
6009 local_got_ents = elf_local_got_ents (abfd);
6011 relend = relocs + sec->reloc_count;
6012 for (rel = relocs; rel < relend; rel++)
6014 unsigned long r_symndx;
6015 enum elf_ppc64_reloc_type r_type;
6016 struct elf_link_hash_entry *h = NULL;
6017 unsigned char tls_type = 0;
6019 r_symndx = ELF64_R_SYM (rel->r_info);
6020 r_type = ELF64_R_TYPE (rel->r_info);
6021 if (r_symndx >= symtab_hdr->sh_info)
6023 struct ppc_link_hash_entry *eh;
6024 struct elf_dyn_relocs **pp;
6025 struct elf_dyn_relocs *p;
6027 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6028 h = elf_follow_link (h);
6029 eh = (struct ppc_link_hash_entry *) h;
6031 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6034 /* Everything must go for SEC. */
6040 if (is_branch_reloc (r_type))
6042 struct plt_entry **ifunc = NULL;
6045 if (h->type == STT_GNU_IFUNC)
6046 ifunc = &h->plt.plist;
6048 else if (local_got_ents != NULL)
6050 struct plt_entry **local_plt = (struct plt_entry **)
6051 (local_got_ents + symtab_hdr->sh_info);
6052 unsigned char *local_got_tls_masks = (unsigned char *)
6053 (local_plt + symtab_hdr->sh_info);
6054 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6055 ifunc = local_plt + r_symndx;
6059 struct plt_entry *ent;
6061 for (ent = *ifunc; ent != NULL; ent = ent->next)
6062 if (ent->addend == rel->r_addend)
6066 if (ent->plt.refcount > 0)
6067 ent->plt.refcount -= 1;
6074 case R_PPC64_GOT_TLSLD16:
6075 case R_PPC64_GOT_TLSLD16_LO:
6076 case R_PPC64_GOT_TLSLD16_HI:
6077 case R_PPC64_GOT_TLSLD16_HA:
6078 tls_type = TLS_TLS | TLS_LD;
6081 case R_PPC64_GOT_TLSGD16:
6082 case R_PPC64_GOT_TLSGD16_LO:
6083 case R_PPC64_GOT_TLSGD16_HI:
6084 case R_PPC64_GOT_TLSGD16_HA:
6085 tls_type = TLS_TLS | TLS_GD;
6088 case R_PPC64_GOT_TPREL16_DS:
6089 case R_PPC64_GOT_TPREL16_LO_DS:
6090 case R_PPC64_GOT_TPREL16_HI:
6091 case R_PPC64_GOT_TPREL16_HA:
6092 tls_type = TLS_TLS | TLS_TPREL;
6095 case R_PPC64_GOT_DTPREL16_DS:
6096 case R_PPC64_GOT_DTPREL16_LO_DS:
6097 case R_PPC64_GOT_DTPREL16_HI:
6098 case R_PPC64_GOT_DTPREL16_HA:
6099 tls_type = TLS_TLS | TLS_DTPREL;
6103 case R_PPC64_GOT16_DS:
6104 case R_PPC64_GOT16_HA:
6105 case R_PPC64_GOT16_HI:
6106 case R_PPC64_GOT16_LO:
6107 case R_PPC64_GOT16_LO_DS:
6110 struct got_entry *ent;
6115 ent = local_got_ents[r_symndx];
6117 for (; ent != NULL; ent = ent->next)
6118 if (ent->addend == rel->r_addend
6119 && ent->owner == abfd
6120 && ent->tls_type == tls_type)
6124 if (ent->got.refcount > 0)
6125 ent->got.refcount -= 1;
6129 case R_PPC64_PLT16_HA:
6130 case R_PPC64_PLT16_HI:
6131 case R_PPC64_PLT16_LO:
6135 case R_PPC64_REL14_BRNTAKEN:
6136 case R_PPC64_REL14_BRTAKEN:
6140 struct plt_entry *ent;
6142 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6143 if (ent->addend == rel->r_addend)
6145 if (ent != NULL && ent->plt.refcount > 0)
6146 ent->plt.refcount -= 1;
6157 /* The maximum size of .sfpr. */
6158 #define SFPR_MAX (218*4)
6160 struct sfpr_def_parms
6162 const char name[12];
6163 unsigned char lo, hi;
6164 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6165 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6168 /* Auto-generate _save*, _rest* functions in .sfpr. */
6171 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6173 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6175 size_t len = strlen (parm->name);
6176 bfd_boolean writing = FALSE;
6182 memcpy (sym, parm->name, len);
6185 for (i = parm->lo; i <= parm->hi; i++)
6187 struct elf_link_hash_entry *h;
6189 sym[len + 0] = i / 10 + '0';
6190 sym[len + 1] = i % 10 + '0';
6191 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6195 h->root.type = bfd_link_hash_defined;
6196 h->root.u.def.section = htab->sfpr;
6197 h->root.u.def.value = htab->sfpr->size;
6200 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6202 if (htab->sfpr->contents == NULL)
6204 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6205 if (htab->sfpr->contents == NULL)
6211 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6213 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6215 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6216 htab->sfpr->size = p - htab->sfpr->contents;
6224 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6226 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6231 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6233 p = savegpr0 (abfd, p, r);
6234 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6236 bfd_put_32 (abfd, BLR, p);
6241 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6243 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6248 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6250 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6252 p = restgpr0 (abfd, p, r);
6253 bfd_put_32 (abfd, MTLR_R0, p);
6257 p = restgpr0 (abfd, p, 30);
6258 p = restgpr0 (abfd, p, 31);
6260 bfd_put_32 (abfd, BLR, p);
6265 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6267 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6272 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6274 p = savegpr1 (abfd, p, r);
6275 bfd_put_32 (abfd, BLR, p);
6280 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6282 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6287 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6289 p = restgpr1 (abfd, p, r);
6290 bfd_put_32 (abfd, BLR, p);
6295 savefpr (bfd *abfd, bfd_byte *p, int r)
6297 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6302 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6304 p = savefpr (abfd, p, r);
6305 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6307 bfd_put_32 (abfd, BLR, p);
6312 restfpr (bfd *abfd, bfd_byte *p, int r)
6314 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6319 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6321 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6323 p = restfpr (abfd, p, r);
6324 bfd_put_32 (abfd, MTLR_R0, p);
6328 p = restfpr (abfd, p, 30);
6329 p = restfpr (abfd, p, 31);
6331 bfd_put_32 (abfd, BLR, p);
6336 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6338 p = savefpr (abfd, p, r);
6339 bfd_put_32 (abfd, BLR, p);
6344 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6346 p = restfpr (abfd, p, r);
6347 bfd_put_32 (abfd, BLR, p);
6352 savevr (bfd *abfd, bfd_byte *p, int r)
6354 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6356 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6361 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6363 p = savevr (abfd, p, r);
6364 bfd_put_32 (abfd, BLR, p);
6369 restvr (bfd *abfd, bfd_byte *p, int r)
6371 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6373 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6378 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6380 p = restvr (abfd, p, r);
6381 bfd_put_32 (abfd, BLR, p);
6385 /* Called via elf_link_hash_traverse to transfer dynamic linking
6386 information on function code symbol entries to their corresponding
6387 function descriptor symbol entries. */
6390 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6392 struct bfd_link_info *info;
6393 struct ppc_link_hash_table *htab;
6394 struct plt_entry *ent;
6395 struct ppc_link_hash_entry *fh;
6396 struct ppc_link_hash_entry *fdh;
6397 bfd_boolean force_local;
6399 fh = (struct ppc_link_hash_entry *) h;
6400 if (fh->elf.root.type == bfd_link_hash_indirect)
6404 htab = ppc_hash_table (info);
6408 /* Resolve undefined references to dot-symbols as the value
6409 in the function descriptor, if we have one in a regular object.
6410 This is to satisfy cases like ".quad .foo". Calls to functions
6411 in dynamic objects are handled elsewhere. */
6412 if (fh->elf.root.type == bfd_link_hash_undefweak
6413 && fh->was_undefined
6414 && (fdh = defined_func_desc (fh)) != NULL
6415 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6416 && opd_entry_value (fdh->elf.root.u.def.section,
6417 fdh->elf.root.u.def.value,
6418 &fh->elf.root.u.def.section,
6419 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6421 fh->elf.root.type = fdh->elf.root.type;
6422 fh->elf.forced_local = 1;
6423 fh->elf.def_regular = fdh->elf.def_regular;
6424 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6427 /* If this is a function code symbol, transfer dynamic linking
6428 information to the function descriptor symbol. */
6432 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6433 if (ent->plt.refcount > 0)
6436 || fh->elf.root.root.string[0] != '.'
6437 || fh->elf.root.root.string[1] == '\0')
6440 /* Find the corresponding function descriptor symbol. Create it
6441 as undefined if necessary. */
6443 fdh = lookup_fdh (fh, htab);
6445 && !info->executable
6446 && (fh->elf.root.type == bfd_link_hash_undefined
6447 || fh->elf.root.type == bfd_link_hash_undefweak))
6449 fdh = make_fdh (info, fh);
6454 /* Fake function descriptors are made undefweak. If the function
6455 code symbol is strong undefined, make the fake sym the same.
6456 If the function code symbol is defined, then force the fake
6457 descriptor local; We can't support overriding of symbols in a
6458 shared library on a fake descriptor. */
6462 && fdh->elf.root.type == bfd_link_hash_undefweak)
6464 if (fh->elf.root.type == bfd_link_hash_undefined)
6466 fdh->elf.root.type = bfd_link_hash_undefined;
6467 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6469 else if (fh->elf.root.type == bfd_link_hash_defined
6470 || fh->elf.root.type == bfd_link_hash_defweak)
6472 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6477 && !fdh->elf.forced_local
6478 && (!info->executable
6479 || fdh->elf.def_dynamic
6480 || fdh->elf.ref_dynamic
6481 || (fdh->elf.root.type == bfd_link_hash_undefweak
6482 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6484 if (fdh->elf.dynindx == -1)
6485 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6487 fdh->elf.ref_regular |= fh->elf.ref_regular;
6488 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6489 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6490 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6491 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6493 move_plt_plist (fh, fdh);
6494 fdh->elf.needs_plt = 1;
6496 fdh->is_func_descriptor = 1;
6501 /* Now that the info is on the function descriptor, clear the
6502 function code sym info. Any function code syms for which we
6503 don't have a definition in a regular file, we force local.
6504 This prevents a shared library from exporting syms that have
6505 been imported from another library. Function code syms that
6506 are really in the library we must leave global to prevent the
6507 linker dragging in a definition from a static library. */
6508 force_local = (!fh->elf.def_regular
6510 || !fdh->elf.def_regular
6511 || fdh->elf.forced_local);
6512 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6517 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6518 this hook to a) provide some gcc support functions, and b) transfer
6519 dynamic linking information gathered so far on function code symbol
6520 entries, to their corresponding function descriptor symbol entries. */
6523 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6524 struct bfd_link_info *info)
6526 struct ppc_link_hash_table *htab;
6528 static const struct sfpr_def_parms funcs[] =
6530 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6531 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6532 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6533 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6534 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6535 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6536 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6537 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6538 { "._savef", 14, 31, savefpr, savefpr1_tail },
6539 { "._restf", 14, 31, restfpr, restfpr1_tail },
6540 { "_savevr_", 20, 31, savevr, savevr_tail },
6541 { "_restvr_", 20, 31, restvr, restvr_tail }
6544 htab = ppc_hash_table (info);
6548 if (htab->sfpr == NULL)
6549 /* We don't have any relocs. */
6552 /* Provide any missing _save* and _rest* functions. */
6553 htab->sfpr->size = 0;
6554 if (!info->relocatable)
6555 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6556 if (!sfpr_define (info, &funcs[i]))
6559 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6561 if (htab->sfpr->size == 0)
6562 htab->sfpr->flags |= SEC_EXCLUDE;
6567 /* Adjust a symbol defined by a dynamic object and referenced by a
6568 regular object. The current definition is in some section of the
6569 dynamic object, but we're not including those sections. We have to
6570 change the definition to something the rest of the link can
6574 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6575 struct elf_link_hash_entry *h)
6577 struct ppc_link_hash_table *htab;
6580 htab = ppc_hash_table (info);
6584 /* Deal with function syms. */
6585 if (h->type == STT_FUNC
6586 || h->type == STT_GNU_IFUNC
6589 /* Clear procedure linkage table information for any symbol that
6590 won't need a .plt entry. */
6591 struct plt_entry *ent;
6592 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6593 if (ent->plt.refcount > 0)
6596 || (h->type != STT_GNU_IFUNC
6597 && (SYMBOL_CALLS_LOCAL (info, h)
6598 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6599 && h->root.type == bfd_link_hash_undefweak))))
6601 h->plt.plist = NULL;
6606 h->plt.plist = NULL;
6608 /* If this is a weak symbol, and there is a real definition, the
6609 processor independent code will have arranged for us to see the
6610 real definition first, and we can just use the same value. */
6611 if (h->u.weakdef != NULL)
6613 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6614 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6615 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6616 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6617 if (ELIMINATE_COPY_RELOCS)
6618 h->non_got_ref = h->u.weakdef->non_got_ref;
6622 /* If we are creating a shared library, we must presume that the
6623 only references to the symbol are via the global offset table.
6624 For such cases we need not do anything here; the relocations will
6625 be handled correctly by relocate_section. */
6629 /* If there are no references to this symbol that do not use the
6630 GOT, we don't need to generate a copy reloc. */
6631 if (!h->non_got_ref)
6634 /* Don't generate a copy reloc for symbols defined in the executable. */
6635 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6638 if (ELIMINATE_COPY_RELOCS)
6640 struct ppc_link_hash_entry * eh;
6641 struct elf_dyn_relocs *p;
6643 eh = (struct ppc_link_hash_entry *) h;
6644 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6646 s = p->sec->output_section;
6647 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6651 /* If we didn't find any dynamic relocs in read-only sections, then
6652 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6660 if (h->plt.plist != NULL)
6662 /* We should never get here, but unfortunately there are versions
6663 of gcc out there that improperly (for this ABI) put initialized
6664 function pointers, vtable refs and suchlike in read-only
6665 sections. Allow them to proceed, but warn that this might
6666 break at runtime. */
6667 info->callbacks->einfo
6668 (_("%P: copy reloc against `%T' requires lazy plt linking; "
6669 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6670 h->root.root.string);
6673 /* This is a reference to a symbol defined by a dynamic object which
6674 is not a function. */
6676 /* We must allocate the symbol in our .dynbss section, which will
6677 become part of the .bss section of the executable. There will be
6678 an entry for this symbol in the .dynsym section. The dynamic
6679 object will contain position independent code, so all references
6680 from the dynamic object to this symbol will go through the global
6681 offset table. The dynamic linker will use the .dynsym entry to
6682 determine the address it must put in the global offset table, so
6683 both the dynamic object and the regular object will refer to the
6684 same memory location for the variable. */
6686 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6687 to copy the initial value out of the dynamic object and into the
6688 runtime process image. We need to remember the offset into the
6689 .rela.bss section we are going to use. */
6690 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6692 htab->relbss->size += sizeof (Elf64_External_Rela);
6698 return _bfd_elf_adjust_dynamic_copy (h, s);
6701 /* If given a function descriptor symbol, hide both the function code
6702 sym and the descriptor. */
6704 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6705 struct elf_link_hash_entry *h,
6706 bfd_boolean force_local)
6708 struct ppc_link_hash_entry *eh;
6709 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6711 eh = (struct ppc_link_hash_entry *) h;
6712 if (eh->is_func_descriptor)
6714 struct ppc_link_hash_entry *fh = eh->oh;
6719 struct ppc_link_hash_table *htab;
6722 /* We aren't supposed to use alloca in BFD because on
6723 systems which do not have alloca the version in libiberty
6724 calls xmalloc, which might cause the program to crash
6725 when it runs out of memory. This function doesn't have a
6726 return status, so there's no way to gracefully return an
6727 error. So cheat. We know that string[-1] can be safely
6728 accessed; It's either a string in an ELF string table,
6729 or allocated in an objalloc structure. */
6731 p = eh->elf.root.root.string - 1;
6734 htab = ppc_hash_table (info);
6738 fh = (struct ppc_link_hash_entry *)
6739 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6742 /* Unfortunately, if it so happens that the string we were
6743 looking for was allocated immediately before this string,
6744 then we overwrote the string terminator. That's the only
6745 reason the lookup should fail. */
6748 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6749 while (q >= eh->elf.root.root.string && *q == *p)
6751 if (q < eh->elf.root.root.string && *p == '.')
6752 fh = (struct ppc_link_hash_entry *)
6753 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6762 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6767 get_sym_h (struct elf_link_hash_entry **hp,
6768 Elf_Internal_Sym **symp,
6770 unsigned char **tls_maskp,
6771 Elf_Internal_Sym **locsymsp,
6772 unsigned long r_symndx,
6775 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6777 if (r_symndx >= symtab_hdr->sh_info)
6779 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6780 struct elf_link_hash_entry *h;
6782 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6783 h = elf_follow_link (h);
6791 if (symsecp != NULL)
6793 asection *symsec = NULL;
6794 if (h->root.type == bfd_link_hash_defined
6795 || h->root.type == bfd_link_hash_defweak)
6796 symsec = h->root.u.def.section;
6800 if (tls_maskp != NULL)
6802 struct ppc_link_hash_entry *eh;
6804 eh = (struct ppc_link_hash_entry *) h;
6805 *tls_maskp = &eh->tls_mask;
6810 Elf_Internal_Sym *sym;
6811 Elf_Internal_Sym *locsyms = *locsymsp;
6813 if (locsyms == NULL)
6815 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6816 if (locsyms == NULL)
6817 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6818 symtab_hdr->sh_info,
6819 0, NULL, NULL, NULL);
6820 if (locsyms == NULL)
6822 *locsymsp = locsyms;
6824 sym = locsyms + r_symndx;
6832 if (symsecp != NULL)
6833 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6835 if (tls_maskp != NULL)
6837 struct got_entry **lgot_ents;
6838 unsigned char *tls_mask;
6841 lgot_ents = elf_local_got_ents (ibfd);
6842 if (lgot_ents != NULL)
6844 struct plt_entry **local_plt = (struct plt_entry **)
6845 (lgot_ents + symtab_hdr->sh_info);
6846 unsigned char *lgot_masks = (unsigned char *)
6847 (local_plt + symtab_hdr->sh_info);
6848 tls_mask = &lgot_masks[r_symndx];
6850 *tls_maskp = tls_mask;
6856 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6857 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6858 type suitable for optimization, and 1 otherwise. */
6861 get_tls_mask (unsigned char **tls_maskp,
6862 unsigned long *toc_symndx,
6863 bfd_vma *toc_addend,
6864 Elf_Internal_Sym **locsymsp,
6865 const Elf_Internal_Rela *rel,
6868 unsigned long r_symndx;
6870 struct elf_link_hash_entry *h;
6871 Elf_Internal_Sym *sym;
6875 r_symndx = ELF64_R_SYM (rel->r_info);
6876 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6879 if ((*tls_maskp != NULL && **tls_maskp != 0)
6881 || ppc64_elf_section_data (sec) == NULL
6882 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6885 /* Look inside a TOC section too. */
6888 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6889 off = h->root.u.def.value;
6892 off = sym->st_value;
6893 off += rel->r_addend;
6894 BFD_ASSERT (off % 8 == 0);
6895 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6896 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6897 if (toc_symndx != NULL)
6898 *toc_symndx = r_symndx;
6899 if (toc_addend != NULL)
6900 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6901 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6903 if ((h == NULL || is_static_defined (h))
6904 && (next_r == -1 || next_r == -2))
6909 /* Find (or create) an entry in the tocsave hash table. */
6911 static struct tocsave_entry *
6912 tocsave_find (struct ppc_link_hash_table *htab,
6913 enum insert_option insert,
6914 Elf_Internal_Sym **local_syms,
6915 const Elf_Internal_Rela *irela,
6918 unsigned long r_indx;
6919 struct elf_link_hash_entry *h;
6920 Elf_Internal_Sym *sym;
6921 struct tocsave_entry ent, *p;
6923 struct tocsave_entry **slot;
6925 r_indx = ELF64_R_SYM (irela->r_info);
6926 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6928 if (ent.sec == NULL || ent.sec->output_section == NULL)
6930 (*_bfd_error_handler)
6931 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6936 ent.offset = h->root.u.def.value;
6938 ent.offset = sym->st_value;
6939 ent.offset += irela->r_addend;
6941 hash = tocsave_htab_hash (&ent);
6942 slot = ((struct tocsave_entry **)
6943 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6949 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6958 /* Adjust all global syms defined in opd sections. In gcc generated
6959 code for the old ABI, these will already have been done. */
6962 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6964 struct ppc_link_hash_entry *eh;
6966 struct _opd_sec_data *opd;
6968 if (h->root.type == bfd_link_hash_indirect)
6971 if (h->root.type != bfd_link_hash_defined
6972 && h->root.type != bfd_link_hash_defweak)
6975 eh = (struct ppc_link_hash_entry *) h;
6976 if (eh->adjust_done)
6979 sym_sec = eh->elf.root.u.def.section;
6980 opd = get_opd_info (sym_sec);
6981 if (opd != NULL && opd->adjust != NULL)
6983 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6986 /* This entry has been deleted. */
6987 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6990 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6991 if (discarded_section (dsec))
6993 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6997 eh->elf.root.u.def.value = 0;
6998 eh->elf.root.u.def.section = dsec;
7001 eh->elf.root.u.def.value += adjust;
7002 eh->adjust_done = 1;
7007 /* Handles decrementing dynamic reloc counts for the reloc specified by
7008 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7009 have already been determined. */
7012 dec_dynrel_count (bfd_vma r_info,
7014 struct bfd_link_info *info,
7015 Elf_Internal_Sym **local_syms,
7016 struct elf_link_hash_entry *h,
7017 Elf_Internal_Sym *sym)
7019 enum elf_ppc64_reloc_type r_type;
7020 asection *sym_sec = NULL;
7022 /* Can this reloc be dynamic? This switch, and later tests here
7023 should be kept in sync with the code in check_relocs. */
7024 r_type = ELF64_R_TYPE (r_info);
7030 case R_PPC64_TPREL16:
7031 case R_PPC64_TPREL16_LO:
7032 case R_PPC64_TPREL16_HI:
7033 case R_PPC64_TPREL16_HA:
7034 case R_PPC64_TPREL16_DS:
7035 case R_PPC64_TPREL16_LO_DS:
7036 case R_PPC64_TPREL16_HIGHER:
7037 case R_PPC64_TPREL16_HIGHERA:
7038 case R_PPC64_TPREL16_HIGHEST:
7039 case R_PPC64_TPREL16_HIGHESTA:
7043 case R_PPC64_TPREL64:
7044 case R_PPC64_DTPMOD64:
7045 case R_PPC64_DTPREL64:
7046 case R_PPC64_ADDR64:
7050 case R_PPC64_ADDR14:
7051 case R_PPC64_ADDR14_BRNTAKEN:
7052 case R_PPC64_ADDR14_BRTAKEN:
7053 case R_PPC64_ADDR16:
7054 case R_PPC64_ADDR16_DS:
7055 case R_PPC64_ADDR16_HA:
7056 case R_PPC64_ADDR16_HI:
7057 case R_PPC64_ADDR16_HIGHER:
7058 case R_PPC64_ADDR16_HIGHERA:
7059 case R_PPC64_ADDR16_HIGHEST:
7060 case R_PPC64_ADDR16_HIGHESTA:
7061 case R_PPC64_ADDR16_LO:
7062 case R_PPC64_ADDR16_LO_DS:
7063 case R_PPC64_ADDR24:
7064 case R_PPC64_ADDR32:
7065 case R_PPC64_UADDR16:
7066 case R_PPC64_UADDR32:
7067 case R_PPC64_UADDR64:
7072 if (local_syms != NULL)
7074 unsigned long r_symndx;
7075 bfd *ibfd = sec->owner;
7077 r_symndx = ELF64_R_SYM (r_info);
7078 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7083 && (must_be_dyn_reloc (info, r_type)
7085 && (!SYMBOLIC_BIND (info, h)
7086 || h->root.type == bfd_link_hash_defweak
7087 || !h->def_regular))))
7088 || (ELIMINATE_COPY_RELOCS
7091 && (h->root.type == bfd_link_hash_defweak
7092 || !h->def_regular)))
7099 struct elf_dyn_relocs *p;
7100 struct elf_dyn_relocs **pp;
7101 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7103 /* elf_gc_sweep may have already removed all dyn relocs associated
7104 with local syms for a given section. Also, symbol flags are
7105 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7106 report a dynreloc miscount. */
7107 if (*pp == NULL && info->gc_sections)
7110 while ((p = *pp) != NULL)
7114 if (!must_be_dyn_reloc (info, r_type))
7126 struct ppc_dyn_relocs *p;
7127 struct ppc_dyn_relocs **pp;
7129 bfd_boolean is_ifunc;
7131 if (local_syms == NULL)
7132 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7133 if (sym_sec == NULL)
7136 vpp = &elf_section_data (sym_sec)->local_dynrel;
7137 pp = (struct ppc_dyn_relocs **) vpp;
7139 if (*pp == NULL && info->gc_sections)
7142 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7143 while ((p = *pp) != NULL)
7145 if (p->sec == sec && p->ifunc == is_ifunc)
7156 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7158 bfd_set_error (bfd_error_bad_value);
7162 /* Remove unused Official Procedure Descriptor entries. Currently we
7163 only remove those associated with functions in discarded link-once
7164 sections, or weakly defined functions that have been overridden. It
7165 would be possible to remove many more entries for statically linked
7169 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7172 bfd_boolean some_edited = FALSE;
7173 asection *need_pad = NULL;
7175 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7178 Elf_Internal_Rela *relstart, *rel, *relend;
7179 Elf_Internal_Shdr *symtab_hdr;
7180 Elf_Internal_Sym *local_syms;
7182 struct _opd_sec_data *opd;
7183 bfd_boolean need_edit, add_aux_fields;
7184 bfd_size_type cnt_16b = 0;
7186 if (!is_ppc64_elf (ibfd))
7189 sec = bfd_get_section_by_name (ibfd, ".opd");
7190 if (sec == NULL || sec->size == 0)
7193 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7196 if (sec->output_section == bfd_abs_section_ptr)
7199 /* Look through the section relocs. */
7200 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7204 symtab_hdr = &elf_symtab_hdr (ibfd);
7206 /* Read the relocations. */
7207 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7209 if (relstart == NULL)
7212 /* First run through the relocs to check they are sane, and to
7213 determine whether we need to edit this opd section. */
7217 relend = relstart + sec->reloc_count;
7218 for (rel = relstart; rel < relend; )
7220 enum elf_ppc64_reloc_type r_type;
7221 unsigned long r_symndx;
7223 struct elf_link_hash_entry *h;
7224 Elf_Internal_Sym *sym;
7226 /* .opd contains a regular array of 16 or 24 byte entries. We're
7227 only interested in the reloc pointing to a function entry
7229 if (rel->r_offset != offset
7230 || rel + 1 >= relend
7231 || (rel + 1)->r_offset != offset + 8)
7233 /* If someone messes with .opd alignment then after a
7234 "ld -r" we might have padding in the middle of .opd.
7235 Also, there's nothing to prevent someone putting
7236 something silly in .opd with the assembler. No .opd
7237 optimization for them! */
7239 (*_bfd_error_handler)
7240 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7245 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7246 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7248 (*_bfd_error_handler)
7249 (_("%B: unexpected reloc type %u in .opd section"),
7255 r_symndx = ELF64_R_SYM (rel->r_info);
7256 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7260 if (sym_sec == NULL || sym_sec->owner == NULL)
7262 const char *sym_name;
7264 sym_name = h->root.root.string;
7266 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7269 (*_bfd_error_handler)
7270 (_("%B: undefined sym `%s' in .opd section"),
7276 /* opd entries are always for functions defined in the
7277 current input bfd. If the symbol isn't defined in the
7278 input bfd, then we won't be using the function in this
7279 bfd; It must be defined in a linkonce section in another
7280 bfd, or is weak. It's also possible that we are
7281 discarding the function due to a linker script /DISCARD/,
7282 which we test for via the output_section. */
7283 if (sym_sec->owner != ibfd
7284 || sym_sec->output_section == bfd_abs_section_ptr)
7289 || (rel + 1 == relend && rel->r_offset == offset + 16))
7291 if (sec->size == offset + 24)
7296 if (rel == relend && sec->size == offset + 16)
7304 if (rel->r_offset == offset + 24)
7306 else if (rel->r_offset != offset + 16)
7308 else if (rel + 1 < relend
7309 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7310 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7315 else if (rel + 2 < relend
7316 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7317 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7326 add_aux_fields = non_overlapping && cnt_16b > 0;
7328 if (need_edit || add_aux_fields)
7330 Elf_Internal_Rela *write_rel;
7331 Elf_Internal_Shdr *rel_hdr;
7332 bfd_byte *rptr, *wptr;
7333 bfd_byte *new_contents;
7338 new_contents = NULL;
7339 amt = sec->size * sizeof (long) / 8;
7340 opd = &ppc64_elf_section_data (sec)->u.opd;
7341 opd->adjust = bfd_zalloc (sec->owner, amt);
7342 if (opd->adjust == NULL)
7344 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7346 /* This seems a waste of time as input .opd sections are all
7347 zeros as generated by gcc, but I suppose there's no reason
7348 this will always be so. We might start putting something in
7349 the third word of .opd entries. */
7350 if ((sec->flags & SEC_IN_MEMORY) == 0)
7353 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7358 if (local_syms != NULL
7359 && symtab_hdr->contents != (unsigned char *) local_syms)
7361 if (elf_section_data (sec)->relocs != relstart)
7365 sec->contents = loc;
7366 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7369 elf_section_data (sec)->relocs = relstart;
7371 new_contents = sec->contents;
7374 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7375 if (new_contents == NULL)
7379 wptr = new_contents;
7380 rptr = sec->contents;
7382 write_rel = relstart;
7386 for (rel = relstart; rel < relend; rel++)
7388 unsigned long r_symndx;
7390 struct elf_link_hash_entry *h;
7391 Elf_Internal_Sym *sym;
7393 r_symndx = ELF64_R_SYM (rel->r_info);
7394 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7398 if (rel->r_offset == offset)
7400 struct ppc_link_hash_entry *fdh = NULL;
7402 /* See if the .opd entry is full 24 byte or
7403 16 byte (with fd_aux entry overlapped with next
7406 if ((rel + 2 == relend && sec->size == offset + 16)
7407 || (rel + 3 < relend
7408 && rel[2].r_offset == offset + 16
7409 && rel[3].r_offset == offset + 24
7410 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7411 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7415 && h->root.root.string[0] == '.')
7417 struct ppc_link_hash_table *htab;
7419 htab = ppc_hash_table (info);
7421 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7424 && fdh->elf.root.type != bfd_link_hash_defined
7425 && fdh->elf.root.type != bfd_link_hash_defweak)
7429 skip = (sym_sec->owner != ibfd
7430 || sym_sec->output_section == bfd_abs_section_ptr);
7433 if (fdh != NULL && sym_sec->owner == ibfd)
7435 /* Arrange for the function descriptor sym
7437 fdh->elf.root.u.def.value = 0;
7438 fdh->elf.root.u.def.section = sym_sec;
7440 opd->adjust[rel->r_offset / 8] = -1;
7444 /* We'll be keeping this opd entry. */
7448 /* Redefine the function descriptor symbol to
7449 this location in the opd section. It is
7450 necessary to update the value here rather
7451 than using an array of adjustments as we do
7452 for local symbols, because various places
7453 in the generic ELF code use the value
7454 stored in u.def.value. */
7455 fdh->elf.root.u.def.value = wptr - new_contents;
7456 fdh->adjust_done = 1;
7459 /* Local syms are a bit tricky. We could
7460 tweak them as they can be cached, but
7461 we'd need to look through the local syms
7462 for the function descriptor sym which we
7463 don't have at the moment. So keep an
7464 array of adjustments. */
7465 opd->adjust[rel->r_offset / 8]
7466 = (wptr - new_contents) - (rptr - sec->contents);
7469 memcpy (wptr, rptr, opd_ent_size);
7470 wptr += opd_ent_size;
7471 if (add_aux_fields && opd_ent_size == 16)
7473 memset (wptr, '\0', 8);
7477 rptr += opd_ent_size;
7478 offset += opd_ent_size;
7484 && !info->relocatable
7485 && !dec_dynrel_count (rel->r_info, sec, info,
7491 /* We need to adjust any reloc offsets to point to the
7492 new opd entries. While we're at it, we may as well
7493 remove redundant relocs. */
7494 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7495 if (write_rel != rel)
7496 memcpy (write_rel, rel, sizeof (*rel));
7501 sec->size = wptr - new_contents;
7502 sec->reloc_count = write_rel - relstart;
7505 free (sec->contents);
7506 sec->contents = new_contents;
7509 /* Fudge the header size too, as this is used later in
7510 elf_bfd_final_link if we are emitting relocs. */
7511 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7512 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7515 else if (elf_section_data (sec)->relocs != relstart)
7518 if (local_syms != NULL
7519 && symtab_hdr->contents != (unsigned char *) local_syms)
7521 if (!info->keep_memory)
7524 symtab_hdr->contents = (unsigned char *) local_syms;
7529 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7531 /* If we are doing a final link and the last .opd entry is just 16 byte
7532 long, add a 8 byte padding after it. */
7533 if (need_pad != NULL && !info->relocatable)
7537 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7539 BFD_ASSERT (need_pad->size > 0);
7541 p = bfd_malloc (need_pad->size + 8);
7545 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7546 p, 0, need_pad->size))
7549 need_pad->contents = p;
7550 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7554 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7558 need_pad->contents = p;
7561 memset (need_pad->contents + need_pad->size, 0, 8);
7562 need_pad->size += 8;
7568 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7571 ppc64_elf_tls_setup (struct bfd_link_info *info,
7572 int no_tls_get_addr_opt,
7575 struct ppc_link_hash_table *htab;
7577 htab = ppc_hash_table (info);
7582 htab->do_multi_toc = 0;
7583 else if (!htab->do_multi_toc)
7586 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7587 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7588 FALSE, FALSE, TRUE));
7589 /* Move dynamic linking info to the function descriptor sym. */
7590 if (htab->tls_get_addr != NULL)
7591 func_desc_adjust (&htab->tls_get_addr->elf, info);
7592 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7593 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7594 FALSE, FALSE, TRUE));
7595 if (!no_tls_get_addr_opt)
7597 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7599 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7600 FALSE, FALSE, TRUE);
7602 func_desc_adjust (opt, info);
7603 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7604 FALSE, FALSE, TRUE);
7606 && (opt_fd->root.type == bfd_link_hash_defined
7607 || opt_fd->root.type == bfd_link_hash_defweak))
7609 /* If glibc supports an optimized __tls_get_addr call stub,
7610 signalled by the presence of __tls_get_addr_opt, and we'll
7611 be calling __tls_get_addr via a plt call stub, then
7612 make __tls_get_addr point to __tls_get_addr_opt. */
7613 tga_fd = &htab->tls_get_addr_fd->elf;
7614 if (htab->elf.dynamic_sections_created
7616 && (tga_fd->type == STT_FUNC
7617 || tga_fd->needs_plt)
7618 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7619 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7620 && tga_fd->root.type == bfd_link_hash_undefweak)))
7622 struct plt_entry *ent;
7624 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7625 if (ent->plt.refcount > 0)
7629 tga_fd->root.type = bfd_link_hash_indirect;
7630 tga_fd->root.u.i.link = &opt_fd->root;
7631 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7632 if (opt_fd->dynindx != -1)
7634 /* Use __tls_get_addr_opt in dynamic relocations. */
7635 opt_fd->dynindx = -1;
7636 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7637 opt_fd->dynstr_index);
7638 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7641 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7642 tga = &htab->tls_get_addr->elf;
7643 if (opt != NULL && tga != NULL)
7645 tga->root.type = bfd_link_hash_indirect;
7646 tga->root.u.i.link = &opt->root;
7647 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7648 _bfd_elf_link_hash_hide_symbol (info, opt,
7650 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7652 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7653 htab->tls_get_addr_fd->is_func_descriptor = 1;
7654 if (htab->tls_get_addr != NULL)
7656 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7657 htab->tls_get_addr->is_func = 1;
7663 no_tls_get_addr_opt = TRUE;
7665 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7666 return _bfd_elf_tls_setup (info->output_bfd, info);
7669 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7673 branch_reloc_hash_match (const bfd *ibfd,
7674 const Elf_Internal_Rela *rel,
7675 const struct ppc_link_hash_entry *hash1,
7676 const struct ppc_link_hash_entry *hash2)
7678 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7679 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7680 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7682 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7684 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7685 struct elf_link_hash_entry *h;
7687 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7688 h = elf_follow_link (h);
7689 if (h == &hash1->elf || h == &hash2->elf)
7695 /* Run through all the TLS relocs looking for optimization
7696 opportunities. The linker has been hacked (see ppc64elf.em) to do
7697 a preliminary section layout so that we know the TLS segment
7698 offsets. We can't optimize earlier because some optimizations need
7699 to know the tp offset, and we need to optimize before allocating
7700 dynamic relocations. */
7703 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7707 struct ppc_link_hash_table *htab;
7708 unsigned char *toc_ref;
7711 if (info->relocatable || !info->executable)
7714 htab = ppc_hash_table (info);
7718 /* Make two passes over the relocs. On the first pass, mark toc
7719 entries involved with tls relocs, and check that tls relocs
7720 involved in setting up a tls_get_addr call are indeed followed by
7721 such a call. If they are not, we can't do any tls optimization.
7722 On the second pass twiddle tls_mask flags to notify
7723 relocate_section that optimization can be done, and adjust got
7724 and plt refcounts. */
7726 for (pass = 0; pass < 2; ++pass)
7727 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7729 Elf_Internal_Sym *locsyms = NULL;
7730 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7732 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7733 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7735 Elf_Internal_Rela *relstart, *rel, *relend;
7736 bfd_boolean found_tls_get_addr_arg = 0;
7738 /* Read the relocations. */
7739 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7741 if (relstart == NULL)
7744 relend = relstart + sec->reloc_count;
7745 for (rel = relstart; rel < relend; rel++)
7747 enum elf_ppc64_reloc_type r_type;
7748 unsigned long r_symndx;
7749 struct elf_link_hash_entry *h;
7750 Elf_Internal_Sym *sym;
7752 unsigned char *tls_mask;
7753 unsigned char tls_set, tls_clear, tls_type = 0;
7755 bfd_boolean ok_tprel, is_local;
7756 long toc_ref_index = 0;
7757 int expecting_tls_get_addr = 0;
7758 bfd_boolean ret = FALSE;
7760 r_symndx = ELF64_R_SYM (rel->r_info);
7761 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7765 if (elf_section_data (sec)->relocs != relstart)
7767 if (toc_ref != NULL)
7770 && (elf_symtab_hdr (ibfd).contents
7771 != (unsigned char *) locsyms))
7778 if (h->root.type == bfd_link_hash_defined
7779 || h->root.type == bfd_link_hash_defweak)
7780 value = h->root.u.def.value;
7781 else if (h->root.type == bfd_link_hash_undefweak)
7785 found_tls_get_addr_arg = 0;
7790 /* Symbols referenced by TLS relocs must be of type
7791 STT_TLS. So no need for .opd local sym adjust. */
7792 value = sym->st_value;
7801 && h->root.type == bfd_link_hash_undefweak)
7805 value += sym_sec->output_offset;
7806 value += sym_sec->output_section->vma;
7807 value -= htab->elf.tls_sec->vma;
7808 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7809 < (bfd_vma) 1 << 32);
7813 r_type = ELF64_R_TYPE (rel->r_info);
7814 /* If this section has old-style __tls_get_addr calls
7815 without marker relocs, then check that each
7816 __tls_get_addr call reloc is preceded by a reloc
7817 that conceivably belongs to the __tls_get_addr arg
7818 setup insn. If we don't find matching arg setup
7819 relocs, don't do any tls optimization. */
7821 && sec->has_tls_get_addr_call
7823 && (h == &htab->tls_get_addr->elf
7824 || h == &htab->tls_get_addr_fd->elf)
7825 && !found_tls_get_addr_arg
7826 && is_branch_reloc (r_type))
7828 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7829 "TLS optimization disabled\n"),
7830 ibfd, sec, rel->r_offset);
7835 found_tls_get_addr_arg = 0;
7838 case R_PPC64_GOT_TLSLD16:
7839 case R_PPC64_GOT_TLSLD16_LO:
7840 expecting_tls_get_addr = 1;
7841 found_tls_get_addr_arg = 1;
7844 case R_PPC64_GOT_TLSLD16_HI:
7845 case R_PPC64_GOT_TLSLD16_HA:
7846 /* These relocs should never be against a symbol
7847 defined in a shared lib. Leave them alone if
7848 that turns out to be the case. */
7855 tls_type = TLS_TLS | TLS_LD;
7858 case R_PPC64_GOT_TLSGD16:
7859 case R_PPC64_GOT_TLSGD16_LO:
7860 expecting_tls_get_addr = 1;
7861 found_tls_get_addr_arg = 1;
7864 case R_PPC64_GOT_TLSGD16_HI:
7865 case R_PPC64_GOT_TLSGD16_HA:
7871 tls_set = TLS_TLS | TLS_TPRELGD;
7873 tls_type = TLS_TLS | TLS_GD;
7876 case R_PPC64_GOT_TPREL16_DS:
7877 case R_PPC64_GOT_TPREL16_LO_DS:
7878 case R_PPC64_GOT_TPREL16_HI:
7879 case R_PPC64_GOT_TPREL16_HA:
7884 tls_clear = TLS_TPREL;
7885 tls_type = TLS_TLS | TLS_TPREL;
7892 found_tls_get_addr_arg = 1;
7897 case R_PPC64_TOC16_LO:
7898 if (sym_sec == NULL || sym_sec != toc)
7901 /* Mark this toc entry as referenced by a TLS
7902 code sequence. We can do that now in the
7903 case of R_PPC64_TLS, and after checking for
7904 tls_get_addr for the TOC16 relocs. */
7905 if (toc_ref == NULL)
7906 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7907 if (toc_ref == NULL)
7911 value = h->root.u.def.value;
7913 value = sym->st_value;
7914 value += rel->r_addend;
7915 BFD_ASSERT (value < toc->size && value % 8 == 0);
7916 toc_ref_index = (value + toc->output_offset) / 8;
7917 if (r_type == R_PPC64_TLS
7918 || r_type == R_PPC64_TLSGD
7919 || r_type == R_PPC64_TLSLD)
7921 toc_ref[toc_ref_index] = 1;
7925 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7930 expecting_tls_get_addr = 2;
7933 case R_PPC64_TPREL64:
7937 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7942 tls_set = TLS_EXPLICIT;
7943 tls_clear = TLS_TPREL;
7948 case R_PPC64_DTPMOD64:
7952 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7954 if (rel + 1 < relend
7956 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7957 && rel[1].r_offset == rel->r_offset + 8)
7961 tls_set = TLS_EXPLICIT | TLS_GD;
7964 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7973 tls_set = TLS_EXPLICIT;
7984 if (!expecting_tls_get_addr
7985 || !sec->has_tls_get_addr_call)
7988 if (rel + 1 < relend
7989 && branch_reloc_hash_match (ibfd, rel + 1,
7991 htab->tls_get_addr_fd))
7993 if (expecting_tls_get_addr == 2)
7995 /* Check for toc tls entries. */
7996 unsigned char *toc_tls;
7999 retval = get_tls_mask (&toc_tls, NULL, NULL,
8004 if (toc_tls != NULL)
8006 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8007 found_tls_get_addr_arg = 1;
8009 toc_ref[toc_ref_index] = 1;
8015 if (expecting_tls_get_addr != 1)
8018 /* Uh oh, we didn't find the expected call. We
8019 could just mark this symbol to exclude it
8020 from tls optimization but it's safer to skip
8021 the entire optimization. */
8022 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8023 "TLS optimization disabled\n"),
8024 ibfd, sec, rel->r_offset);
8029 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8031 struct plt_entry *ent;
8032 for (ent = htab->tls_get_addr->elf.plt.plist;
8035 if (ent->addend == 0)
8037 if (ent->plt.refcount > 0)
8039 ent->plt.refcount -= 1;
8040 expecting_tls_get_addr = 0;
8046 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8048 struct plt_entry *ent;
8049 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8052 if (ent->addend == 0)
8054 if (ent->plt.refcount > 0)
8055 ent->plt.refcount -= 1;
8063 if ((tls_set & TLS_EXPLICIT) == 0)
8065 struct got_entry *ent;
8067 /* Adjust got entry for this reloc. */
8071 ent = elf_local_got_ents (ibfd)[r_symndx];
8073 for (; ent != NULL; ent = ent->next)
8074 if (ent->addend == rel->r_addend
8075 && ent->owner == ibfd
8076 && ent->tls_type == tls_type)
8083 /* We managed to get rid of a got entry. */
8084 if (ent->got.refcount > 0)
8085 ent->got.refcount -= 1;
8090 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8091 we'll lose one or two dyn relocs. */
8092 if (!dec_dynrel_count (rel->r_info, sec, info,
8096 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8098 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8104 *tls_mask |= tls_set;
8105 *tls_mask &= ~tls_clear;
8108 if (elf_section_data (sec)->relocs != relstart)
8113 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8115 if (!info->keep_memory)
8118 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8122 if (toc_ref != NULL)
8127 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8128 the values of any global symbols in a toc section that has been
8129 edited. Globals in toc sections should be a rarity, so this function
8130 sets a flag if any are found in toc sections other than the one just
8131 edited, so that futher hash table traversals can be avoided. */
8133 struct adjust_toc_info
8136 unsigned long *skip;
8137 bfd_boolean global_toc_syms;
8140 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8143 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8145 struct ppc_link_hash_entry *eh;
8146 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8149 if (h->root.type != bfd_link_hash_defined
8150 && h->root.type != bfd_link_hash_defweak)
8153 eh = (struct ppc_link_hash_entry *) h;
8154 if (eh->adjust_done)
8157 if (eh->elf.root.u.def.section == toc_inf->toc)
8159 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8160 i = toc_inf->toc->rawsize >> 3;
8162 i = eh->elf.root.u.def.value >> 3;
8164 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8166 (*_bfd_error_handler)
8167 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8170 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8171 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8174 eh->elf.root.u.def.value -= toc_inf->skip[i];
8175 eh->adjust_done = 1;
8177 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8178 toc_inf->global_toc_syms = TRUE;
8183 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8186 ok_lo_toc_insn (unsigned int insn)
8188 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8189 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8190 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8191 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8192 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8193 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8194 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8195 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8196 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8197 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8198 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8199 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8200 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8201 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8202 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8204 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8205 && ((insn & 3) == 0 || (insn & 3) == 3))
8206 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8209 /* Examine all relocs referencing .toc sections in order to remove
8210 unused .toc entries. */
8213 ppc64_elf_edit_toc (struct bfd_link_info *info)
8216 struct adjust_toc_info toc_inf;
8217 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8219 htab->do_toc_opt = 1;
8220 toc_inf.global_toc_syms = TRUE;
8221 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8223 asection *toc, *sec;
8224 Elf_Internal_Shdr *symtab_hdr;
8225 Elf_Internal_Sym *local_syms;
8226 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8227 unsigned long *skip, *drop;
8228 unsigned char *used;
8229 unsigned char *keep, last, some_unused;
8231 if (!is_ppc64_elf (ibfd))
8234 toc = bfd_get_section_by_name (ibfd, ".toc");
8237 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8238 || discarded_section (toc))
8243 symtab_hdr = &elf_symtab_hdr (ibfd);
8245 /* Look at sections dropped from the final link. */
8248 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8250 if (sec->reloc_count == 0
8251 || !discarded_section (sec)
8252 || get_opd_info (sec)
8253 || (sec->flags & SEC_ALLOC) == 0
8254 || (sec->flags & SEC_DEBUGGING) != 0)
8257 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8258 if (relstart == NULL)
8261 /* Run through the relocs to see which toc entries might be
8263 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8265 enum elf_ppc64_reloc_type r_type;
8266 unsigned long r_symndx;
8268 struct elf_link_hash_entry *h;
8269 Elf_Internal_Sym *sym;
8272 r_type = ELF64_R_TYPE (rel->r_info);
8279 case R_PPC64_TOC16_LO:
8280 case R_PPC64_TOC16_HI:
8281 case R_PPC64_TOC16_HA:
8282 case R_PPC64_TOC16_DS:
8283 case R_PPC64_TOC16_LO_DS:
8287 r_symndx = ELF64_R_SYM (rel->r_info);
8288 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8296 val = h->root.u.def.value;
8298 val = sym->st_value;
8299 val += rel->r_addend;
8301 if (val >= toc->size)
8304 /* Anything in the toc ought to be aligned to 8 bytes.
8305 If not, don't mark as unused. */
8311 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8316 skip[val >> 3] = ref_from_discarded;
8319 if (elf_section_data (sec)->relocs != relstart)
8323 /* For largetoc loads of address constants, we can convert
8324 . addis rx,2,addr@got@ha
8325 . ld ry,addr@got@l(rx)
8327 . addis rx,2,addr@toc@ha
8328 . addi ry,rx,addr@toc@l
8329 when addr is within 2G of the toc pointer. This then means
8330 that the word storing "addr" in the toc is no longer needed. */
8332 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8333 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8334 && toc->reloc_count != 0)
8336 /* Read toc relocs. */
8337 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8339 if (toc_relocs == NULL)
8342 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8344 enum elf_ppc64_reloc_type r_type;
8345 unsigned long r_symndx;
8347 struct elf_link_hash_entry *h;
8348 Elf_Internal_Sym *sym;
8351 r_type = ELF64_R_TYPE (rel->r_info);
8352 if (r_type != R_PPC64_ADDR64)
8355 r_symndx = ELF64_R_SYM (rel->r_info);
8356 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8361 || discarded_section (sym_sec))
8364 if (!SYMBOL_CALLS_LOCAL (info, h))
8369 if (h->type == STT_GNU_IFUNC)
8371 val = h->root.u.def.value;
8375 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8377 val = sym->st_value;
8379 val += rel->r_addend;
8380 val += sym_sec->output_section->vma + sym_sec->output_offset;
8382 /* We don't yet know the exact toc pointer value, but we
8383 know it will be somewhere in the toc section. Don't
8384 optimize if the difference from any possible toc
8385 pointer is outside [ff..f80008000, 7fff7fff]. */
8386 addr = toc->output_section->vma + TOC_BASE_OFF;
8387 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8390 addr = toc->output_section->vma + toc->output_section->rawsize;
8391 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8396 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8401 skip[rel->r_offset >> 3]
8402 |= can_optimize | ((rel - toc_relocs) << 2);
8409 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8413 if (local_syms != NULL
8414 && symtab_hdr->contents != (unsigned char *) local_syms)
8418 && elf_section_data (sec)->relocs != relstart)
8420 if (toc_relocs != NULL
8421 && elf_section_data (toc)->relocs != toc_relocs)
8428 /* Now check all kept sections that might reference the toc.
8429 Check the toc itself last. */
8430 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8433 sec = (sec == toc ? NULL
8434 : sec->next == NULL ? toc
8435 : sec->next == toc && toc->next ? toc->next
8440 if (sec->reloc_count == 0
8441 || discarded_section (sec)
8442 || get_opd_info (sec)
8443 || (sec->flags & SEC_ALLOC) == 0
8444 || (sec->flags & SEC_DEBUGGING) != 0)
8447 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8449 if (relstart == NULL)
8452 /* Mark toc entries referenced as used. */
8456 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8458 enum elf_ppc64_reloc_type r_type;
8459 unsigned long r_symndx;
8461 struct elf_link_hash_entry *h;
8462 Elf_Internal_Sym *sym;
8464 enum {no_check, check_lo, check_ha} insn_check;
8466 r_type = ELF64_R_TYPE (rel->r_info);
8470 insn_check = no_check;
8473 case R_PPC64_GOT_TLSLD16_HA:
8474 case R_PPC64_GOT_TLSGD16_HA:
8475 case R_PPC64_GOT_TPREL16_HA:
8476 case R_PPC64_GOT_DTPREL16_HA:
8477 case R_PPC64_GOT16_HA:
8478 case R_PPC64_TOC16_HA:
8479 insn_check = check_ha;
8482 case R_PPC64_GOT_TLSLD16_LO:
8483 case R_PPC64_GOT_TLSGD16_LO:
8484 case R_PPC64_GOT_TPREL16_LO_DS:
8485 case R_PPC64_GOT_DTPREL16_LO_DS:
8486 case R_PPC64_GOT16_LO:
8487 case R_PPC64_GOT16_LO_DS:
8488 case R_PPC64_TOC16_LO:
8489 case R_PPC64_TOC16_LO_DS:
8490 insn_check = check_lo;
8494 if (insn_check != no_check)
8496 bfd_vma off = rel->r_offset & ~3;
8497 unsigned char buf[4];
8500 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8505 insn = bfd_get_32 (ibfd, buf);
8506 if (insn_check == check_lo
8507 ? !ok_lo_toc_insn (insn)
8508 : ((insn & ((0x3f << 26) | 0x1f << 16))
8509 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8513 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8514 sprintf (str, "%#08x", insn);
8515 info->callbacks->einfo
8516 (_("%P: %H: toc optimization is not supported for"
8517 " %s instruction.\n"),
8518 ibfd, sec, rel->r_offset & ~3, str);
8525 case R_PPC64_TOC16_LO:
8526 case R_PPC64_TOC16_HI:
8527 case R_PPC64_TOC16_HA:
8528 case R_PPC64_TOC16_DS:
8529 case R_PPC64_TOC16_LO_DS:
8530 /* In case we're taking addresses of toc entries. */
8531 case R_PPC64_ADDR64:
8538 r_symndx = ELF64_R_SYM (rel->r_info);
8539 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8550 val = h->root.u.def.value;
8552 val = sym->st_value;
8553 val += rel->r_addend;
8555 if (val >= toc->size)
8558 if ((skip[val >> 3] & can_optimize) != 0)
8565 case R_PPC64_TOC16_HA:
8568 case R_PPC64_TOC16_LO_DS:
8569 off = rel->r_offset;
8570 off += (bfd_big_endian (ibfd) ? -2 : 3);
8571 if (!bfd_get_section_contents (ibfd, sec, &opc,
8577 if ((opc & (0x3f << 2)) == (58u << 2))
8582 /* Wrong sort of reloc, or not a ld. We may
8583 as well clear ref_from_discarded too. */
8590 /* For the toc section, we only mark as used if this
8591 entry itself isn't unused. */
8592 else if ((used[rel->r_offset >> 3]
8593 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8596 /* Do all the relocs again, to catch reference
8605 if (elf_section_data (sec)->relocs != relstart)
8609 /* Merge the used and skip arrays. Assume that TOC
8610 doublewords not appearing as either used or unused belong
8611 to to an entry more than one doubleword in size. */
8612 for (drop = skip, keep = used, last = 0, some_unused = 0;
8613 drop < skip + (toc->size + 7) / 8;
8618 *drop &= ~ref_from_discarded;
8619 if ((*drop & can_optimize) != 0)
8623 else if ((*drop & ref_from_discarded) != 0)
8626 last = ref_from_discarded;
8636 bfd_byte *contents, *src;
8638 Elf_Internal_Sym *sym;
8639 bfd_boolean local_toc_syms = FALSE;
8641 /* Shuffle the toc contents, and at the same time convert the
8642 skip array from booleans into offsets. */
8643 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8646 elf_section_data (toc)->this_hdr.contents = contents;
8648 for (src = contents, off = 0, drop = skip;
8649 src < contents + toc->size;
8652 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8657 memcpy (src - off, src, 8);
8661 toc->rawsize = toc->size;
8662 toc->size = src - contents - off;
8664 /* Adjust addends for relocs against the toc section sym,
8665 and optimize any accesses we can. */
8666 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8668 if (sec->reloc_count == 0
8669 || discarded_section (sec))
8672 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8674 if (relstart == NULL)
8677 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8679 enum elf_ppc64_reloc_type r_type;
8680 unsigned long r_symndx;
8682 struct elf_link_hash_entry *h;
8685 r_type = ELF64_R_TYPE (rel->r_info);
8692 case R_PPC64_TOC16_LO:
8693 case R_PPC64_TOC16_HI:
8694 case R_PPC64_TOC16_HA:
8695 case R_PPC64_TOC16_DS:
8696 case R_PPC64_TOC16_LO_DS:
8697 case R_PPC64_ADDR64:
8701 r_symndx = ELF64_R_SYM (rel->r_info);
8702 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8710 val = h->root.u.def.value;
8713 val = sym->st_value;
8715 local_toc_syms = TRUE;
8718 val += rel->r_addend;
8720 if (val > toc->rawsize)
8722 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8724 else if ((skip[val >> 3] & can_optimize) != 0)
8726 Elf_Internal_Rela *tocrel
8727 = toc_relocs + (skip[val >> 3] >> 2);
8728 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8732 case R_PPC64_TOC16_HA:
8733 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8736 case R_PPC64_TOC16_LO_DS:
8737 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8741 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8743 info->callbacks->einfo
8744 (_("%P: %H: %s references "
8745 "optimized away TOC entry\n"),
8746 ibfd, sec, rel->r_offset,
8747 ppc64_elf_howto_table[r_type]->name);
8748 bfd_set_error (bfd_error_bad_value);
8751 rel->r_addend = tocrel->r_addend;
8752 elf_section_data (sec)->relocs = relstart;
8756 if (h != NULL || sym->st_value != 0)
8759 rel->r_addend -= skip[val >> 3];
8760 elf_section_data (sec)->relocs = relstart;
8763 if (elf_section_data (sec)->relocs != relstart)
8767 /* We shouldn't have local or global symbols defined in the TOC,
8768 but handle them anyway. */
8769 if (local_syms != NULL)
8770 for (sym = local_syms;
8771 sym < local_syms + symtab_hdr->sh_info;
8773 if (sym->st_value != 0
8774 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8778 if (sym->st_value > toc->rawsize)
8779 i = toc->rawsize >> 3;
8781 i = sym->st_value >> 3;
8783 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8786 (*_bfd_error_handler)
8787 (_("%s defined on removed toc entry"),
8788 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8791 while ((skip[i] & (ref_from_discarded | can_optimize)));
8792 sym->st_value = (bfd_vma) i << 3;
8795 sym->st_value -= skip[i];
8796 symtab_hdr->contents = (unsigned char *) local_syms;
8799 /* Adjust any global syms defined in this toc input section. */
8800 if (toc_inf.global_toc_syms)
8803 toc_inf.skip = skip;
8804 toc_inf.global_toc_syms = FALSE;
8805 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8809 if (toc->reloc_count != 0)
8811 Elf_Internal_Shdr *rel_hdr;
8812 Elf_Internal_Rela *wrel;
8815 /* Remove unused toc relocs, and adjust those we keep. */
8816 if (toc_relocs == NULL)
8817 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8819 if (toc_relocs == NULL)
8823 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8824 if ((skip[rel->r_offset >> 3]
8825 & (ref_from_discarded | can_optimize)) == 0)
8827 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8828 wrel->r_info = rel->r_info;
8829 wrel->r_addend = rel->r_addend;
8832 else if (!dec_dynrel_count (rel->r_info, toc, info,
8833 &local_syms, NULL, NULL))
8836 elf_section_data (toc)->relocs = toc_relocs;
8837 toc->reloc_count = wrel - toc_relocs;
8838 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8839 sz = rel_hdr->sh_entsize;
8840 rel_hdr->sh_size = toc->reloc_count * sz;
8843 else if (toc_relocs != NULL
8844 && elf_section_data (toc)->relocs != toc_relocs)
8847 if (local_syms != NULL
8848 && symtab_hdr->contents != (unsigned char *) local_syms)
8850 if (!info->keep_memory)
8853 symtab_hdr->contents = (unsigned char *) local_syms;
8861 /* Return true iff input section I references the TOC using
8862 instructions limited to +/-32k offsets. */
8865 ppc64_elf_has_small_toc_reloc (asection *i)
8867 return (is_ppc64_elf (i->owner)
8868 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8871 /* Allocate space for one GOT entry. */
8874 allocate_got (struct elf_link_hash_entry *h,
8875 struct bfd_link_info *info,
8876 struct got_entry *gent)
8878 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8880 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8881 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8883 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8884 ? 2 : 1) * sizeof (Elf64_External_Rela);
8885 asection *got = ppc64_elf_tdata (gent->owner)->got;
8887 gent->got.offset = got->size;
8888 got->size += entsize;
8890 dyn = htab->elf.dynamic_sections_created;
8891 if (h->type == STT_GNU_IFUNC)
8893 htab->reliplt->size += rentsize;
8894 htab->got_reli_size += rentsize;
8896 else if ((info->shared
8897 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8898 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8899 || h->root.type != bfd_link_hash_undefweak))
8901 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8902 relgot->size += rentsize;
8906 /* This function merges got entries in the same toc group. */
8909 merge_got_entries (struct got_entry **pent)
8911 struct got_entry *ent, *ent2;
8913 for (ent = *pent; ent != NULL; ent = ent->next)
8914 if (!ent->is_indirect)
8915 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8916 if (!ent2->is_indirect
8917 && ent2->addend == ent->addend
8918 && ent2->tls_type == ent->tls_type
8919 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8921 ent2->is_indirect = TRUE;
8922 ent2->got.ent = ent;
8926 /* Allocate space in .plt, .got and associated reloc sections for
8930 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8932 struct bfd_link_info *info;
8933 struct ppc_link_hash_table *htab;
8935 struct ppc_link_hash_entry *eh;
8936 struct elf_dyn_relocs *p;
8937 struct got_entry **pgent, *gent;
8939 if (h->root.type == bfd_link_hash_indirect)
8942 info = (struct bfd_link_info *) inf;
8943 htab = ppc_hash_table (info);
8947 if ((htab->elf.dynamic_sections_created
8949 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8950 || h->type == STT_GNU_IFUNC)
8952 struct plt_entry *pent;
8953 bfd_boolean doneone = FALSE;
8954 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8955 if (pent->plt.refcount > 0)
8957 if (!htab->elf.dynamic_sections_created
8958 || h->dynindx == -1)
8961 pent->plt.offset = s->size;
8962 s->size += PLT_ENTRY_SIZE;
8967 /* If this is the first .plt entry, make room for the special
8971 s->size += PLT_INITIAL_ENTRY_SIZE;
8973 pent->plt.offset = s->size;
8975 /* Make room for this entry. */
8976 s->size += PLT_ENTRY_SIZE;
8978 /* Make room for the .glink code. */
8981 s->size += GLINK_CALL_STUB_SIZE;
8982 /* We need bigger stubs past index 32767. */
8983 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8987 /* We also need to make an entry in the .rela.plt section. */
8990 s->size += sizeof (Elf64_External_Rela);
8994 pent->plt.offset = (bfd_vma) -1;
8997 h->plt.plist = NULL;
9003 h->plt.plist = NULL;
9007 eh = (struct ppc_link_hash_entry *) h;
9008 /* Run through the TLS GD got entries first if we're changing them
9010 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9011 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9012 if (gent->got.refcount > 0
9013 && (gent->tls_type & TLS_GD) != 0)
9015 /* This was a GD entry that has been converted to TPREL. If
9016 there happens to be a TPREL entry we can use that one. */
9017 struct got_entry *ent;
9018 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9019 if (ent->got.refcount > 0
9020 && (ent->tls_type & TLS_TPREL) != 0
9021 && ent->addend == gent->addend
9022 && ent->owner == gent->owner)
9024 gent->got.refcount = 0;
9028 /* If not, then we'll be using our own TPREL entry. */
9029 if (gent->got.refcount != 0)
9030 gent->tls_type = TLS_TLS | TLS_TPREL;
9033 /* Remove any list entry that won't generate a word in the GOT before
9034 we call merge_got_entries. Otherwise we risk merging to empty
9036 pgent = &h->got.glist;
9037 while ((gent = *pgent) != NULL)
9038 if (gent->got.refcount > 0)
9040 if ((gent->tls_type & TLS_LD) != 0
9043 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9044 *pgent = gent->next;
9047 pgent = &gent->next;
9050 *pgent = gent->next;
9052 if (!htab->do_multi_toc)
9053 merge_got_entries (&h->got.glist);
9055 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9056 if (!gent->is_indirect)
9058 /* Make sure this symbol is output as a dynamic symbol.
9059 Undefined weak syms won't yet be marked as dynamic,
9060 nor will all TLS symbols. */
9061 if (h->dynindx == -1
9063 && h->type != STT_GNU_IFUNC
9064 && htab->elf.dynamic_sections_created)
9066 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9070 if (!is_ppc64_elf (gent->owner))
9073 allocate_got (h, info, gent);
9076 if (eh->dyn_relocs == NULL
9077 || (!htab->elf.dynamic_sections_created
9078 && h->type != STT_GNU_IFUNC))
9081 /* In the shared -Bsymbolic case, discard space allocated for
9082 dynamic pc-relative relocs against symbols which turn out to be
9083 defined in regular objects. For the normal shared case, discard
9084 space for relocs that have become local due to symbol visibility
9089 /* Relocs that use pc_count are those that appear on a call insn,
9090 or certain REL relocs (see must_be_dyn_reloc) that can be
9091 generated via assembly. We want calls to protected symbols to
9092 resolve directly to the function rather than going via the plt.
9093 If people want function pointer comparisons to work as expected
9094 then they should avoid writing weird assembly. */
9095 if (SYMBOL_CALLS_LOCAL (info, h))
9097 struct elf_dyn_relocs **pp;
9099 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9101 p->count -= p->pc_count;
9110 /* Also discard relocs on undefined weak syms with non-default
9112 if (eh->dyn_relocs != NULL
9113 && h->root.type == bfd_link_hash_undefweak)
9115 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9116 eh->dyn_relocs = NULL;
9118 /* Make sure this symbol is output as a dynamic symbol.
9119 Undefined weak syms won't yet be marked as dynamic. */
9120 else if (h->dynindx == -1
9121 && !h->forced_local)
9123 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9128 else if (h->type == STT_GNU_IFUNC)
9130 if (!h->non_got_ref)
9131 eh->dyn_relocs = NULL;
9133 else if (ELIMINATE_COPY_RELOCS)
9135 /* For the non-shared case, discard space for relocs against
9136 symbols which turn out to need copy relocs or are not
9142 /* Make sure this symbol is output as a dynamic symbol.
9143 Undefined weak syms won't yet be marked as dynamic. */
9144 if (h->dynindx == -1
9145 && !h->forced_local)
9147 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9151 /* If that succeeded, we know we'll be keeping all the
9153 if (h->dynindx != -1)
9157 eh->dyn_relocs = NULL;
9162 /* Finally, allocate space. */
9163 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9165 asection *sreloc = elf_section_data (p->sec)->sreloc;
9166 if (eh->elf.type == STT_GNU_IFUNC)
9167 sreloc = htab->reliplt;
9168 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9174 /* Find any dynamic relocs that apply to read-only sections. */
9177 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9179 struct ppc_link_hash_entry *eh;
9180 struct elf_dyn_relocs *p;
9182 eh = (struct ppc_link_hash_entry *) h;
9183 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9185 asection *s = p->sec->output_section;
9187 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9189 struct bfd_link_info *info = inf;
9191 info->flags |= DF_TEXTREL;
9193 /* Not an error, just cut short the traversal. */
9200 /* Set the sizes of the dynamic sections. */
9203 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9204 struct bfd_link_info *info)
9206 struct ppc_link_hash_table *htab;
9211 struct got_entry *first_tlsld;
9213 htab = ppc_hash_table (info);
9217 dynobj = htab->elf.dynobj;
9221 if (htab->elf.dynamic_sections_created)
9223 /* Set the contents of the .interp section to the interpreter. */
9224 if (info->executable)
9226 s = bfd_get_linker_section (dynobj, ".interp");
9229 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9230 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9234 /* Set up .got offsets for local syms, and space for local dynamic
9236 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9238 struct got_entry **lgot_ents;
9239 struct got_entry **end_lgot_ents;
9240 struct plt_entry **local_plt;
9241 struct plt_entry **end_local_plt;
9242 unsigned char *lgot_masks;
9243 bfd_size_type locsymcount;
9244 Elf_Internal_Shdr *symtab_hdr;
9246 if (!is_ppc64_elf (ibfd))
9249 for (s = ibfd->sections; s != NULL; s = s->next)
9251 struct ppc_dyn_relocs *p;
9253 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9255 if (!bfd_is_abs_section (p->sec)
9256 && bfd_is_abs_section (p->sec->output_section))
9258 /* Input section has been discarded, either because
9259 it is a copy of a linkonce section or due to
9260 linker script /DISCARD/, so we'll be discarding
9263 else if (p->count != 0)
9265 asection *srel = elf_section_data (p->sec)->sreloc;
9267 srel = htab->reliplt;
9268 srel->size += p->count * sizeof (Elf64_External_Rela);
9269 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9270 info->flags |= DF_TEXTREL;
9275 lgot_ents = elf_local_got_ents (ibfd);
9279 symtab_hdr = &elf_symtab_hdr (ibfd);
9280 locsymcount = symtab_hdr->sh_info;
9281 end_lgot_ents = lgot_ents + locsymcount;
9282 local_plt = (struct plt_entry **) end_lgot_ents;
9283 end_local_plt = local_plt + locsymcount;
9284 lgot_masks = (unsigned char *) end_local_plt;
9285 s = ppc64_elf_tdata (ibfd)->got;
9286 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9288 struct got_entry **pent, *ent;
9291 while ((ent = *pent) != NULL)
9292 if (ent->got.refcount > 0)
9294 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9296 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9301 unsigned int ent_size = 8;
9302 unsigned int rel_size = sizeof (Elf64_External_Rela);
9304 ent->got.offset = s->size;
9305 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9310 s->size += ent_size;
9311 if ((*lgot_masks & PLT_IFUNC) != 0)
9313 htab->reliplt->size += rel_size;
9314 htab->got_reli_size += rel_size;
9316 else if (info->shared)
9318 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9319 srel->size += rel_size;
9328 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9329 for (; local_plt < end_local_plt; ++local_plt)
9331 struct plt_entry *ent;
9333 for (ent = *local_plt; ent != NULL; ent = ent->next)
9334 if (ent->plt.refcount > 0)
9337 ent->plt.offset = s->size;
9338 s->size += PLT_ENTRY_SIZE;
9340 htab->reliplt->size += sizeof (Elf64_External_Rela);
9343 ent->plt.offset = (bfd_vma) -1;
9347 /* Allocate global sym .plt and .got entries, and space for global
9348 sym dynamic relocs. */
9349 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9352 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9354 struct got_entry *ent;
9356 if (!is_ppc64_elf (ibfd))
9359 ent = ppc64_tlsld_got (ibfd);
9360 if (ent->got.refcount > 0)
9362 if (!htab->do_multi_toc && first_tlsld != NULL)
9364 ent->is_indirect = TRUE;
9365 ent->got.ent = first_tlsld;
9369 if (first_tlsld == NULL)
9371 s = ppc64_elf_tdata (ibfd)->got;
9372 ent->got.offset = s->size;
9377 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9378 srel->size += sizeof (Elf64_External_Rela);
9383 ent->got.offset = (bfd_vma) -1;
9386 /* We now have determined the sizes of the various dynamic sections.
9387 Allocate memory for them. */
9389 for (s = dynobj->sections; s != NULL; s = s->next)
9391 if ((s->flags & SEC_LINKER_CREATED) == 0)
9394 if (s == htab->brlt || s == htab->relbrlt)
9395 /* These haven't been allocated yet; don't strip. */
9397 else if (s == htab->got
9401 || s == htab->dynbss)
9403 /* Strip this section if we don't need it; see the
9406 else if (s == htab->glink_eh_frame)
9408 if (!bfd_is_abs_section (s->output_section))
9409 /* Not sized yet. */
9412 else if (CONST_STRNEQ (s->name, ".rela"))
9416 if (s != htab->relplt)
9419 /* We use the reloc_count field as a counter if we need
9420 to copy relocs into the output file. */
9426 /* It's not one of our sections, so don't allocate space. */
9432 /* If we don't need this section, strip it from the
9433 output file. This is mostly to handle .rela.bss and
9434 .rela.plt. We must create both sections in
9435 create_dynamic_sections, because they must be created
9436 before the linker maps input sections to output
9437 sections. The linker does that before
9438 adjust_dynamic_symbol is called, and it is that
9439 function which decides whether anything needs to go
9440 into these sections. */
9441 s->flags |= SEC_EXCLUDE;
9445 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9448 /* Allocate memory for the section contents. We use bfd_zalloc
9449 here in case unused entries are not reclaimed before the
9450 section's contents are written out. This should not happen,
9451 but this way if it does we get a R_PPC64_NONE reloc in .rela
9452 sections instead of garbage.
9453 We also rely on the section contents being zero when writing
9455 s->contents = bfd_zalloc (dynobj, s->size);
9456 if (s->contents == NULL)
9460 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9462 if (!is_ppc64_elf (ibfd))
9465 s = ppc64_elf_tdata (ibfd)->got;
9466 if (s != NULL && s != htab->got)
9469 s->flags |= SEC_EXCLUDE;
9472 s->contents = bfd_zalloc (ibfd, s->size);
9473 if (s->contents == NULL)
9477 s = ppc64_elf_tdata (ibfd)->relgot;
9481 s->flags |= SEC_EXCLUDE;
9484 s->contents = bfd_zalloc (ibfd, s->size);
9485 if (s->contents == NULL)
9493 if (htab->elf.dynamic_sections_created)
9495 /* Add some entries to the .dynamic section. We fill in the
9496 values later, in ppc64_elf_finish_dynamic_sections, but we
9497 must add the entries now so that we get the correct size for
9498 the .dynamic section. The DT_DEBUG entry is filled in by the
9499 dynamic linker and used by the debugger. */
9500 #define add_dynamic_entry(TAG, VAL) \
9501 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9503 if (info->executable)
9505 if (!add_dynamic_entry (DT_DEBUG, 0))
9509 if (htab->plt != NULL && htab->plt->size != 0)
9511 if (!add_dynamic_entry (DT_PLTGOT, 0)
9512 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9513 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9514 || !add_dynamic_entry (DT_JMPREL, 0)
9515 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9521 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9522 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9526 if (!htab->no_tls_get_addr_opt
9527 && htab->tls_get_addr_fd != NULL
9528 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9529 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9534 if (!add_dynamic_entry (DT_RELA, 0)
9535 || !add_dynamic_entry (DT_RELASZ, 0)
9536 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9539 /* If any dynamic relocs apply to a read-only section,
9540 then we need a DT_TEXTREL entry. */
9541 if ((info->flags & DF_TEXTREL) == 0)
9542 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9544 if ((info->flags & DF_TEXTREL) != 0)
9546 if (!add_dynamic_entry (DT_TEXTREL, 0))
9551 #undef add_dynamic_entry
9556 /* Determine the type of stub needed, if any, for a call. */
9558 static inline enum ppc_stub_type
9559 ppc_type_of_stub (asection *input_sec,
9560 const Elf_Internal_Rela *rel,
9561 struct ppc_link_hash_entry **hash,
9562 struct plt_entry **plt_ent,
9563 bfd_vma destination)
9565 struct ppc_link_hash_entry *h = *hash;
9567 bfd_vma branch_offset;
9568 bfd_vma max_branch_offset;
9569 enum elf_ppc64_reloc_type r_type;
9573 struct plt_entry *ent;
9574 struct ppc_link_hash_entry *fdh = h;
9576 && h->oh->is_func_descriptor)
9578 fdh = ppc_follow_link (h->oh);
9582 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9583 if (ent->addend == rel->r_addend
9584 && ent->plt.offset != (bfd_vma) -1)
9587 return ppc_stub_plt_call;
9590 /* Here, we know we don't have a plt entry. If we don't have a
9591 either a defined function descriptor or a defined entry symbol
9592 in a regular object file, then it is pointless trying to make
9593 any other type of stub. */
9594 if (!is_static_defined (&fdh->elf)
9595 && !is_static_defined (&h->elf))
9596 return ppc_stub_none;
9598 else if (elf_local_got_ents (input_sec->owner) != NULL)
9600 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9601 struct plt_entry **local_plt = (struct plt_entry **)
9602 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9603 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9605 if (local_plt[r_symndx] != NULL)
9607 struct plt_entry *ent;
9609 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9610 if (ent->addend == rel->r_addend
9611 && ent->plt.offset != (bfd_vma) -1)
9614 return ppc_stub_plt_call;
9619 /* Determine where the call point is. */
9620 location = (input_sec->output_offset
9621 + input_sec->output_section->vma
9624 branch_offset = destination - location;
9625 r_type = ELF64_R_TYPE (rel->r_info);
9627 /* Determine if a long branch stub is needed. */
9628 max_branch_offset = 1 << 25;
9629 if (r_type != R_PPC64_REL24)
9630 max_branch_offset = 1 << 15;
9632 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9633 /* We need a stub. Figure out whether a long_branch or plt_branch
9635 return ppc_stub_long_branch;
9637 return ppc_stub_none;
9640 /* With power7 weakly ordered memory model, it is possible for ld.so
9641 to update a plt entry in one thread and have another thread see a
9642 stale zero toc entry. To avoid this we need some sort of acquire
9643 barrier in the call stub. One solution is to make the load of the
9644 toc word seem to appear to depend on the load of the function entry
9645 word. Another solution is to test for r2 being zero, and branch to
9646 the appropriate glink entry if so.
9648 . fake dep barrier compare
9649 . ld 11,xxx(2) ld 11,xxx(2)
9651 . xor 11,11,11 ld 2,xxx+8(2)
9652 . add 2,2,11 cmpldi 2,0
9653 . ld 2,xxx+8(2) bnectr+
9654 . bctr b <glink_entry>
9656 The solution involving the compare turns out to be faster, so
9657 that's what we use unless the branch won't reach. */
9659 #define ALWAYS_USE_FAKE_DEP 0
9660 #define ALWAYS_EMIT_R2SAVE 0
9662 #define PPC_LO(v) ((v) & 0xffff)
9663 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9664 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9666 static inline unsigned int
9667 plt_stub_size (struct ppc_link_hash_table *htab,
9668 struct ppc_stub_hash_entry *stub_entry,
9671 unsigned size = PLT_CALL_STUB_SIZE;
9673 if (!(ALWAYS_EMIT_R2SAVE
9674 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9676 if (!htab->plt_static_chain)
9678 if (htab->plt_thread_safe)
9680 if (PPC_HA (off) == 0)
9682 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9684 if (stub_entry->h != NULL
9685 && (stub_entry->h == htab->tls_get_addr_fd
9686 || stub_entry->h == htab->tls_get_addr)
9687 && !htab->no_tls_get_addr_opt)
9692 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9693 then return the padding needed to do so. */
9694 static inline unsigned int
9695 plt_stub_pad (struct ppc_link_hash_table *htab,
9696 struct ppc_stub_hash_entry *stub_entry,
9699 int stub_align = 1 << htab->plt_stub_align;
9700 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9701 bfd_vma stub_off = stub_entry->stub_sec->size;
9703 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9704 > (stub_size & -stub_align))
9705 return stub_align - (stub_off & (stub_align - 1));
9709 /* Build a .plt call stub. */
9711 static inline bfd_byte *
9712 build_plt_stub (struct ppc_link_hash_table *htab,
9713 struct ppc_stub_hash_entry *stub_entry,
9714 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9716 bfd *obfd = htab->stub_bfd;
9717 bfd_boolean plt_static_chain = htab->plt_static_chain;
9718 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9719 bfd_boolean use_fake_dep = plt_thread_safe;
9720 bfd_vma cmp_branch_off = 0;
9722 if (!ALWAYS_USE_FAKE_DEP
9724 && !(stub_entry->h != NULL
9725 && (stub_entry->h == htab->tls_get_addr_fd
9726 || stub_entry->h == htab->tls_get_addr)
9727 && !htab->no_tls_get_addr_opt))
9729 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9730 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9731 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9734 if (pltindex > 32768)
9735 glinkoff += (pltindex - 32768) * 4;
9737 + htab->glink->output_offset
9738 + htab->glink->output_section->vma);
9739 from = (p - stub_entry->stub_sec->contents
9740 + 4 * (ALWAYS_EMIT_R2SAVE
9741 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9742 + 4 * (PPC_HA (offset) != 0)
9743 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9745 + 4 * (plt_static_chain != 0)
9747 + stub_entry->stub_sec->output_offset
9748 + stub_entry->stub_sec->output_section->vma);
9749 cmp_branch_off = to - from;
9750 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9753 if (PPC_HA (offset) != 0)
9757 if (ALWAYS_EMIT_R2SAVE
9758 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9760 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9761 r[1].r_offset = r[0].r_offset + 4;
9762 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9763 r[1].r_addend = r[0].r_addend;
9764 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9766 r[2].r_offset = r[1].r_offset + 4;
9767 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9768 r[2].r_addend = r[0].r_addend;
9772 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9773 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9774 r[2].r_addend = r[0].r_addend + 8;
9775 if (plt_static_chain)
9777 r[3].r_offset = r[2].r_offset + 4;
9778 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9779 r[3].r_addend = r[0].r_addend + 16;
9783 if (ALWAYS_EMIT_R2SAVE
9784 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9785 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9786 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9787 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9788 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9790 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9793 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9796 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9797 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9799 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9800 if (plt_static_chain)
9801 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9807 if (ALWAYS_EMIT_R2SAVE
9808 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9810 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9811 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9813 r[1].r_offset = r[0].r_offset + 4;
9814 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9815 r[1].r_addend = r[0].r_addend;
9819 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9820 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9821 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9822 if (plt_static_chain)
9824 r[2].r_offset = r[1].r_offset + 4;
9825 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9826 r[2].r_addend = r[0].r_addend + 8;
9830 if (ALWAYS_EMIT_R2SAVE
9831 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9832 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9833 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9834 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9836 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9839 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9842 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9843 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9845 if (plt_static_chain)
9846 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9847 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9849 if (plt_thread_safe && !use_fake_dep)
9851 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9852 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9853 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
9856 bfd_put_32 (obfd, BCTR, p), p += 4;
9860 /* Build a special .plt call stub for __tls_get_addr. */
9862 #define LD_R11_0R3 0xe9630000
9863 #define LD_R12_0R3 0xe9830000
9864 #define MR_R0_R3 0x7c601b78
9865 #define CMPDI_R11_0 0x2c2b0000
9866 #define ADD_R3_R12_R13 0x7c6c6a14
9867 #define BEQLR 0x4d820020
9868 #define MR_R3_R0 0x7c030378
9869 #define MFLR_R11 0x7d6802a6
9870 #define STD_R11_0R1 0xf9610000
9871 #define BCTRL 0x4e800421
9872 #define LD_R11_0R1 0xe9610000
9873 #define LD_R2_0R1 0xe8410000
9874 #define MTLR_R11 0x7d6803a6
9876 static inline bfd_byte *
9877 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
9878 struct ppc_stub_hash_entry *stub_entry,
9879 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9881 bfd *obfd = htab->stub_bfd;
9883 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9884 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9885 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9886 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9887 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9888 bfd_put_32 (obfd, BEQLR, p), p += 4;
9889 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9890 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9891 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9894 r[0].r_offset += 9 * 4;
9895 p = build_plt_stub (htab, stub_entry, p, offset, r);
9896 bfd_put_32 (obfd, BCTRL, p - 4);
9898 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9899 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9900 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9901 bfd_put_32 (obfd, BLR, p), p += 4;
9906 static Elf_Internal_Rela *
9907 get_relocs (asection *sec, int count)
9909 Elf_Internal_Rela *relocs;
9910 struct bfd_elf_section_data *elfsec_data;
9912 elfsec_data = elf_section_data (sec);
9913 relocs = elfsec_data->relocs;
9916 bfd_size_type relsize;
9917 relsize = sec->reloc_count * sizeof (*relocs);
9918 relocs = bfd_alloc (sec->owner, relsize);
9921 elfsec_data->relocs = relocs;
9922 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9923 sizeof (Elf_Internal_Shdr));
9924 if (elfsec_data->rela.hdr == NULL)
9926 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9927 * sizeof (Elf64_External_Rela));
9928 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9929 sec->reloc_count = 0;
9931 relocs += sec->reloc_count;
9932 sec->reloc_count += count;
9937 get_r2off (struct bfd_link_info *info,
9938 struct ppc_stub_hash_entry *stub_entry)
9940 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9941 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9945 /* Support linking -R objects. Get the toc pointer from the
9948 asection *opd = stub_entry->h->elf.root.u.def.section;
9949 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9951 if (strcmp (opd->name, ".opd") != 0
9952 || opd->reloc_count != 0)
9954 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
9955 stub_entry->h->elf.root.root.string);
9956 bfd_set_error (bfd_error_bad_value);
9959 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9961 r2off = bfd_get_64 (opd->owner, buf);
9962 r2off -= elf_gp (info->output_bfd);
9964 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9969 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9971 struct ppc_stub_hash_entry *stub_entry;
9972 struct ppc_branch_hash_entry *br_entry;
9973 struct bfd_link_info *info;
9974 struct ppc_link_hash_table *htab;
9979 Elf_Internal_Rela *r;
9982 /* Massage our args to the form they really have. */
9983 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9986 htab = ppc_hash_table (info);
9990 /* Make a note of the offset within the stubs for this entry. */
9991 stub_entry->stub_offset = stub_entry->stub_sec->size;
9992 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9994 htab->stub_count[stub_entry->stub_type - 1] += 1;
9995 switch (stub_entry->stub_type)
9997 case ppc_stub_long_branch:
9998 case ppc_stub_long_branch_r2off:
9999 /* Branches are relative. This is where we are going to. */
10000 off = dest = (stub_entry->target_value
10001 + stub_entry->target_section->output_offset
10002 + stub_entry->target_section->output_section->vma);
10004 /* And this is where we are coming from. */
10005 off -= (stub_entry->stub_offset
10006 + stub_entry->stub_sec->output_offset
10007 + stub_entry->stub_sec->output_section->vma);
10010 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10012 bfd_vma r2off = get_r2off (info, stub_entry);
10016 htab->stub_error = TRUE;
10019 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10022 if (PPC_HA (r2off) != 0)
10025 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10028 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10032 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10034 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10036 info->callbacks->einfo
10037 (_("%P: long branch stub `%s' offset overflow\n"),
10038 stub_entry->root.string);
10039 htab->stub_error = TRUE;
10043 if (info->emitrelocations)
10045 r = get_relocs (stub_entry->stub_sec, 1);
10048 r->r_offset = loc - stub_entry->stub_sec->contents;
10049 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10050 r->r_addend = dest;
10051 if (stub_entry->h != NULL)
10053 struct elf_link_hash_entry **hashes;
10054 unsigned long symndx;
10055 struct ppc_link_hash_entry *h;
10057 hashes = elf_sym_hashes (htab->stub_bfd);
10058 if (hashes == NULL)
10060 bfd_size_type hsize;
10062 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10063 hashes = bfd_zalloc (htab->stub_bfd, hsize);
10064 if (hashes == NULL)
10066 elf_sym_hashes (htab->stub_bfd) = hashes;
10067 htab->stub_globals = 1;
10069 symndx = htab->stub_globals++;
10071 hashes[symndx] = &h->elf;
10072 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10073 if (h->oh != NULL && h->oh->is_func)
10074 h = ppc_follow_link (h->oh);
10075 if (h->elf.root.u.def.section != stub_entry->target_section)
10076 /* H is an opd symbol. The addend must be zero. */
10080 off = (h->elf.root.u.def.value
10081 + h->elf.root.u.def.section->output_offset
10082 + h->elf.root.u.def.section->output_section->vma);
10083 r->r_addend -= off;
10089 case ppc_stub_plt_branch:
10090 case ppc_stub_plt_branch_r2off:
10091 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10092 stub_entry->root.string + 9,
10094 if (br_entry == NULL)
10096 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10097 stub_entry->root.string);
10098 htab->stub_error = TRUE;
10102 dest = (stub_entry->target_value
10103 + stub_entry->target_section->output_offset
10104 + stub_entry->target_section->output_section->vma);
10106 bfd_put_64 (htab->brlt->owner, dest,
10107 htab->brlt->contents + br_entry->offset);
10109 if (br_entry->iter == htab->stub_iteration)
10111 br_entry->iter = 0;
10113 if (htab->relbrlt != NULL)
10115 /* Create a reloc for the branch lookup table entry. */
10116 Elf_Internal_Rela rela;
10119 rela.r_offset = (br_entry->offset
10120 + htab->brlt->output_offset
10121 + htab->brlt->output_section->vma);
10122 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10123 rela.r_addend = dest;
10125 rl = htab->relbrlt->contents;
10126 rl += (htab->relbrlt->reloc_count++
10127 * sizeof (Elf64_External_Rela));
10128 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10130 else if (info->emitrelocations)
10132 r = get_relocs (htab->brlt, 1);
10135 /* brlt, being SEC_LINKER_CREATED does not go through the
10136 normal reloc processing. Symbols and offsets are not
10137 translated from input file to output file form, so
10138 set up the offset per the output file. */
10139 r->r_offset = (br_entry->offset
10140 + htab->brlt->output_offset
10141 + htab->brlt->output_section->vma);
10142 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10143 r->r_addend = dest;
10147 dest = (br_entry->offset
10148 + htab->brlt->output_offset
10149 + htab->brlt->output_section->vma);
10152 - elf_gp (htab->brlt->output_section->owner)
10153 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10155 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10157 info->callbacks->einfo
10158 (_("%P: linkage table error against `%T'\n"),
10159 stub_entry->root.string);
10160 bfd_set_error (bfd_error_bad_value);
10161 htab->stub_error = TRUE;
10165 if (info->emitrelocations)
10167 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10170 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10171 if (bfd_big_endian (info->output_bfd))
10172 r[0].r_offset += 2;
10173 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10174 r[0].r_offset += 4;
10175 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10176 r[0].r_addend = dest;
10177 if (PPC_HA (off) != 0)
10179 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10180 r[1].r_offset = r[0].r_offset + 4;
10181 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10182 r[1].r_addend = r[0].r_addend;
10186 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10188 if (PPC_HA (off) != 0)
10191 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10193 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10198 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10203 bfd_vma r2off = get_r2off (info, stub_entry);
10207 htab->stub_error = TRUE;
10211 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10214 if (PPC_HA (off) != 0)
10217 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10219 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10224 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10228 if (PPC_HA (r2off) != 0)
10231 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10234 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10237 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10239 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10242 case ppc_stub_plt_call:
10243 case ppc_stub_plt_call_r2save:
10244 if (stub_entry->h != NULL
10245 && stub_entry->h->is_func_descriptor
10246 && stub_entry->h->oh != NULL)
10248 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10250 /* If the old-ABI "dot-symbol" is undefined make it weak so
10251 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10252 FIXME: We used to define the symbol on one of the call
10253 stubs instead, which is why we test symbol section id
10254 against htab->top_id in various places. Likely all
10255 these checks could now disappear. */
10256 if (fh->elf.root.type == bfd_link_hash_undefined)
10257 fh->elf.root.type = bfd_link_hash_undefweak;
10258 /* Stop undo_symbol_twiddle changing it back to undefined. */
10259 fh->was_undefined = 0;
10262 /* Now build the stub. */
10263 dest = stub_entry->plt_ent->plt.offset & ~1;
10264 if (dest >= (bfd_vma) -2)
10268 if (!htab->elf.dynamic_sections_created
10269 || stub_entry->h == NULL
10270 || stub_entry->h->elf.dynindx == -1)
10273 dest += plt->output_offset + plt->output_section->vma;
10275 if (stub_entry->h == NULL
10276 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10278 Elf_Internal_Rela rela;
10281 rela.r_offset = dest;
10282 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10283 rela.r_addend = (stub_entry->target_value
10284 + stub_entry->target_section->output_offset
10285 + stub_entry->target_section->output_section->vma);
10287 rl = (htab->reliplt->contents
10288 + (htab->reliplt->reloc_count++
10289 * sizeof (Elf64_External_Rela)));
10290 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10291 stub_entry->plt_ent->plt.offset |= 1;
10295 - elf_gp (plt->output_section->owner)
10296 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10298 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10300 info->callbacks->einfo
10301 (_("%P: linkage table error against `%T'\n"),
10302 stub_entry->h != NULL
10303 ? stub_entry->h->elf.root.root.string
10305 bfd_set_error (bfd_error_bad_value);
10306 htab->stub_error = TRUE;
10310 if (htab->plt_stub_align != 0)
10312 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10314 stub_entry->stub_sec->size += pad;
10315 stub_entry->stub_offset = stub_entry->stub_sec->size;
10320 if (info->emitrelocations)
10322 r = get_relocs (stub_entry->stub_sec,
10324 + (PPC_HA (off) != 0)
10325 + (htab->plt_static_chain
10326 && PPC_HA (off + 16) == PPC_HA (off))));
10329 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10330 if (bfd_big_endian (info->output_bfd))
10331 r[0].r_offset += 2;
10332 r[0].r_addend = dest;
10334 if (stub_entry->h != NULL
10335 && (stub_entry->h == htab->tls_get_addr_fd
10336 || stub_entry->h == htab->tls_get_addr)
10337 && !htab->no_tls_get_addr_opt)
10338 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10340 p = build_plt_stub (htab, stub_entry, loc, off, r);
10349 stub_entry->stub_sec->size += size;
10351 if (htab->emit_stub_syms)
10353 struct elf_link_hash_entry *h;
10356 const char *const stub_str[] = { "long_branch",
10357 "long_branch_r2off",
10359 "plt_branch_r2off",
10363 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10364 len2 = strlen (stub_entry->root.string);
10365 name = bfd_malloc (len1 + len2 + 2);
10368 memcpy (name, stub_entry->root.string, 9);
10369 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10370 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10371 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10374 if (h->root.type == bfd_link_hash_new)
10376 h->root.type = bfd_link_hash_defined;
10377 h->root.u.def.section = stub_entry->stub_sec;
10378 h->root.u.def.value = stub_entry->stub_offset;
10379 h->ref_regular = 1;
10380 h->def_regular = 1;
10381 h->ref_regular_nonweak = 1;
10382 h->forced_local = 1;
10390 /* As above, but don't actually build the stub. Just bump offset so
10391 we know stub section sizes, and select plt_branch stubs where
10392 long_branch stubs won't do. */
10395 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10397 struct ppc_stub_hash_entry *stub_entry;
10398 struct bfd_link_info *info;
10399 struct ppc_link_hash_table *htab;
10403 /* Massage our args to the form they really have. */
10404 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10407 htab = ppc_hash_table (info);
10411 if (stub_entry->stub_type == ppc_stub_plt_call
10412 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10415 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10416 if (off >= (bfd_vma) -2)
10419 if (!htab->elf.dynamic_sections_created
10420 || stub_entry->h == NULL
10421 || stub_entry->h->elf.dynindx == -1)
10423 off += (plt->output_offset
10424 + plt->output_section->vma
10425 - elf_gp (plt->output_section->owner)
10426 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10428 size = plt_stub_size (htab, stub_entry, off);
10429 if (htab->plt_stub_align)
10430 size += plt_stub_pad (htab, stub_entry, off);
10431 if (info->emitrelocations)
10433 stub_entry->stub_sec->reloc_count
10435 + (PPC_HA (off) != 0)
10436 + (htab->plt_static_chain
10437 && PPC_HA (off + 16) == PPC_HA (off)));
10438 stub_entry->stub_sec->flags |= SEC_RELOC;
10443 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10447 off = (stub_entry->target_value
10448 + stub_entry->target_section->output_offset
10449 + stub_entry->target_section->output_section->vma);
10450 off -= (stub_entry->stub_sec->size
10451 + stub_entry->stub_sec->output_offset
10452 + stub_entry->stub_sec->output_section->vma);
10454 /* Reset the stub type from the plt variant in case we now
10455 can reach with a shorter stub. */
10456 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10457 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10460 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10462 r2off = get_r2off (info, stub_entry);
10465 htab->stub_error = TRUE;
10469 if (PPC_HA (r2off) != 0)
10474 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10475 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10477 struct ppc_branch_hash_entry *br_entry;
10479 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10480 stub_entry->root.string + 9,
10482 if (br_entry == NULL)
10484 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10485 stub_entry->root.string);
10486 htab->stub_error = TRUE;
10490 if (br_entry->iter != htab->stub_iteration)
10492 br_entry->iter = htab->stub_iteration;
10493 br_entry->offset = htab->brlt->size;
10494 htab->brlt->size += 8;
10496 if (htab->relbrlt != NULL)
10497 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10498 else if (info->emitrelocations)
10500 htab->brlt->reloc_count += 1;
10501 htab->brlt->flags |= SEC_RELOC;
10505 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10506 off = (br_entry->offset
10507 + htab->brlt->output_offset
10508 + htab->brlt->output_section->vma
10509 - elf_gp (htab->brlt->output_section->owner)
10510 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10512 if (info->emitrelocations)
10514 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10515 stub_entry->stub_sec->flags |= SEC_RELOC;
10518 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10521 if (PPC_HA (off) != 0)
10527 if (PPC_HA (off) != 0)
10530 if (PPC_HA (r2off) != 0)
10534 else if (info->emitrelocations)
10536 stub_entry->stub_sec->reloc_count += 1;
10537 stub_entry->stub_sec->flags |= SEC_RELOC;
10541 stub_entry->stub_sec->size += size;
10545 /* Set up various things so that we can make a list of input sections
10546 for each output section included in the link. Returns -1 on error,
10547 0 when no stubs will be needed, and 1 on success. */
10550 ppc64_elf_setup_section_lists
10551 (struct bfd_link_info *info,
10552 asection *(*add_stub_section) (const char *, asection *),
10553 void (*layout_sections_again) (void))
10556 int top_id, top_index, id;
10558 asection **input_list;
10560 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10564 /* Stash our params away. */
10565 htab->add_stub_section = add_stub_section;
10566 htab->layout_sections_again = layout_sections_again;
10568 /* Find the top input section id. */
10569 for (input_bfd = info->input_bfds, top_id = 3;
10571 input_bfd = input_bfd->link_next)
10573 for (section = input_bfd->sections;
10575 section = section->next)
10577 if (top_id < section->id)
10578 top_id = section->id;
10582 htab->top_id = top_id;
10583 amt = sizeof (struct map_stub) * (top_id + 1);
10584 htab->stub_group = bfd_zmalloc (amt);
10585 if (htab->stub_group == NULL)
10588 /* Set toc_off for com, und, abs and ind sections. */
10589 for (id = 0; id < 3; id++)
10590 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10592 /* We can't use output_bfd->section_count here to find the top output
10593 section index as some sections may have been removed, and
10594 strip_excluded_output_sections doesn't renumber the indices. */
10595 for (section = info->output_bfd->sections, top_index = 0;
10597 section = section->next)
10599 if (top_index < section->index)
10600 top_index = section->index;
10603 htab->top_index = top_index;
10604 amt = sizeof (asection *) * (top_index + 1);
10605 input_list = bfd_zmalloc (amt);
10606 htab->input_list = input_list;
10607 if (input_list == NULL)
10613 /* Set up for first pass at multitoc partitioning. */
10616 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10618 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10620 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10621 htab->toc_curr = elf_gp (info->output_bfd);
10622 htab->toc_bfd = NULL;
10623 htab->toc_first_sec = NULL;
10626 /* The linker repeatedly calls this function for each TOC input section
10627 and linker generated GOT section. Group input bfds such that the toc
10628 within a group is less than 64k in size. */
10631 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10633 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10634 bfd_vma addr, off, limit;
10639 if (!htab->second_toc_pass)
10641 /* Keep track of the first .toc or .got section for this input bfd. */
10642 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
10646 htab->toc_bfd = isec->owner;
10647 htab->toc_first_sec = isec;
10650 addr = isec->output_offset + isec->output_section->vma;
10651 off = addr - htab->toc_curr;
10652 limit = 0x80008000;
10653 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10655 if (off + isec->size > limit)
10657 addr = (htab->toc_first_sec->output_offset
10658 + htab->toc_first_sec->output_section->vma);
10659 htab->toc_curr = addr;
10662 /* toc_curr is the base address of this toc group. Set elf_gp
10663 for the input section to be the offset relative to the
10664 output toc base plus 0x8000. Making the input elf_gp an
10665 offset allows us to move the toc as a whole without
10666 recalculating input elf_gp. */
10667 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10668 off += TOC_BASE_OFF;
10670 /* Die if someone uses a linker script that doesn't keep input
10671 file .toc and .got together. */
10673 && elf_gp (isec->owner) != 0
10674 && elf_gp (isec->owner) != off)
10677 elf_gp (isec->owner) = off;
10681 /* During the second pass toc_first_sec points to the start of
10682 a toc group, and toc_curr is used to track the old elf_gp.
10683 We use toc_bfd to ensure we only look at each bfd once. */
10684 if (htab->toc_bfd == isec->owner)
10686 htab->toc_bfd = isec->owner;
10688 if (htab->toc_first_sec == NULL
10689 || htab->toc_curr != elf_gp (isec->owner))
10691 htab->toc_curr = elf_gp (isec->owner);
10692 htab->toc_first_sec = isec;
10694 addr = (htab->toc_first_sec->output_offset
10695 + htab->toc_first_sec->output_section->vma);
10696 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10697 elf_gp (isec->owner) = off;
10702 /* Called via elf_link_hash_traverse to merge GOT entries for global
10706 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10708 if (h->root.type == bfd_link_hash_indirect)
10711 merge_got_entries (&h->got.glist);
10716 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10720 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10722 struct got_entry *gent;
10724 if (h->root.type == bfd_link_hash_indirect)
10727 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10728 if (!gent->is_indirect)
10729 allocate_got (h, (struct bfd_link_info *) inf, gent);
10733 /* Called on the first multitoc pass after the last call to
10734 ppc64_elf_next_toc_section. This function removes duplicate GOT
10738 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10740 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10741 struct bfd *ibfd, *ibfd2;
10742 bfd_boolean done_something;
10744 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10746 if (!htab->do_multi_toc)
10749 /* Merge global sym got entries within a toc group. */
10750 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10752 /* And tlsld_got. */
10753 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10755 struct got_entry *ent, *ent2;
10757 if (!is_ppc64_elf (ibfd))
10760 ent = ppc64_tlsld_got (ibfd);
10761 if (!ent->is_indirect
10762 && ent->got.offset != (bfd_vma) -1)
10764 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10766 if (!is_ppc64_elf (ibfd2))
10769 ent2 = ppc64_tlsld_got (ibfd2);
10770 if (!ent2->is_indirect
10771 && ent2->got.offset != (bfd_vma) -1
10772 && elf_gp (ibfd2) == elf_gp (ibfd))
10774 ent2->is_indirect = TRUE;
10775 ent2->got.ent = ent;
10781 /* Zap sizes of got sections. */
10782 htab->reliplt->rawsize = htab->reliplt->size;
10783 htab->reliplt->size -= htab->got_reli_size;
10784 htab->got_reli_size = 0;
10786 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10788 asection *got, *relgot;
10790 if (!is_ppc64_elf (ibfd))
10793 got = ppc64_elf_tdata (ibfd)->got;
10796 got->rawsize = got->size;
10798 relgot = ppc64_elf_tdata (ibfd)->relgot;
10799 relgot->rawsize = relgot->size;
10804 /* Now reallocate the got, local syms first. We don't need to
10805 allocate section contents again since we never increase size. */
10806 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10808 struct got_entry **lgot_ents;
10809 struct got_entry **end_lgot_ents;
10810 struct plt_entry **local_plt;
10811 struct plt_entry **end_local_plt;
10812 unsigned char *lgot_masks;
10813 bfd_size_type locsymcount;
10814 Elf_Internal_Shdr *symtab_hdr;
10817 if (!is_ppc64_elf (ibfd))
10820 lgot_ents = elf_local_got_ents (ibfd);
10824 symtab_hdr = &elf_symtab_hdr (ibfd);
10825 locsymcount = symtab_hdr->sh_info;
10826 end_lgot_ents = lgot_ents + locsymcount;
10827 local_plt = (struct plt_entry **) end_lgot_ents;
10828 end_local_plt = local_plt + locsymcount;
10829 lgot_masks = (unsigned char *) end_local_plt;
10830 s = ppc64_elf_tdata (ibfd)->got;
10831 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10833 struct got_entry *ent;
10835 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10837 unsigned int ent_size = 8;
10838 unsigned int rel_size = sizeof (Elf64_External_Rela);
10840 ent->got.offset = s->size;
10841 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10846 s->size += ent_size;
10847 if ((*lgot_masks & PLT_IFUNC) != 0)
10849 htab->reliplt->size += rel_size;
10850 htab->got_reli_size += rel_size;
10852 else if (info->shared)
10854 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10855 srel->size += rel_size;
10861 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10863 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10865 struct got_entry *ent;
10867 if (!is_ppc64_elf (ibfd))
10870 ent = ppc64_tlsld_got (ibfd);
10871 if (!ent->is_indirect
10872 && ent->got.offset != (bfd_vma) -1)
10874 asection *s = ppc64_elf_tdata (ibfd)->got;
10875 ent->got.offset = s->size;
10879 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10880 srel->size += sizeof (Elf64_External_Rela);
10885 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10886 if (!done_something)
10887 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10891 if (!is_ppc64_elf (ibfd))
10894 got = ppc64_elf_tdata (ibfd)->got;
10897 done_something = got->rawsize != got->size;
10898 if (done_something)
10903 if (done_something)
10904 (*htab->layout_sections_again) ();
10906 /* Set up for second pass over toc sections to recalculate elf_gp
10907 on input sections. */
10908 htab->toc_bfd = NULL;
10909 htab->toc_first_sec = NULL;
10910 htab->second_toc_pass = TRUE;
10911 return done_something;
10914 /* Called after second pass of multitoc partitioning. */
10917 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10919 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10921 /* After the second pass, toc_curr tracks the TOC offset used
10922 for code sections below in ppc64_elf_next_input_section. */
10923 htab->toc_curr = TOC_BASE_OFF;
10926 /* No toc references were found in ISEC. If the code in ISEC makes no
10927 calls, then there's no need to use toc adjusting stubs when branching
10928 into ISEC. Actually, indirect calls from ISEC are OK as they will
10929 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10930 needed, and 2 if a cyclical call-graph was found but no other reason
10931 for a stub was detected. If called from the top level, a return of
10932 2 means the same as a return of 0. */
10935 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10939 /* Mark this section as checked. */
10940 isec->call_check_done = 1;
10942 /* We know none of our code bearing sections will need toc stubs. */
10943 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10946 if (isec->size == 0)
10949 if (isec->output_section == NULL)
10953 if (isec->reloc_count != 0)
10955 Elf_Internal_Rela *relstart, *rel;
10956 Elf_Internal_Sym *local_syms;
10957 struct ppc_link_hash_table *htab;
10959 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10960 info->keep_memory);
10961 if (relstart == NULL)
10964 /* Look for branches to outside of this section. */
10966 htab = ppc_hash_table (info);
10970 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10972 enum elf_ppc64_reloc_type r_type;
10973 unsigned long r_symndx;
10974 struct elf_link_hash_entry *h;
10975 struct ppc_link_hash_entry *eh;
10976 Elf_Internal_Sym *sym;
10978 struct _opd_sec_data *opd;
10982 r_type = ELF64_R_TYPE (rel->r_info);
10983 if (r_type != R_PPC64_REL24
10984 && r_type != R_PPC64_REL14
10985 && r_type != R_PPC64_REL14_BRTAKEN
10986 && r_type != R_PPC64_REL14_BRNTAKEN)
10989 r_symndx = ELF64_R_SYM (rel->r_info);
10990 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10997 /* Calls to dynamic lib functions go through a plt call stub
10999 eh = (struct ppc_link_hash_entry *) h;
11001 && (eh->elf.plt.plist != NULL
11003 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11009 if (sym_sec == NULL)
11010 /* Ignore other undefined symbols. */
11013 /* Assume branches to other sections not included in the
11014 link need stubs too, to cover -R and absolute syms. */
11015 if (sym_sec->output_section == NULL)
11022 sym_value = sym->st_value;
11025 if (h->root.type != bfd_link_hash_defined
11026 && h->root.type != bfd_link_hash_defweak)
11028 sym_value = h->root.u.def.value;
11030 sym_value += rel->r_addend;
11032 /* If this branch reloc uses an opd sym, find the code section. */
11033 opd = get_opd_info (sym_sec);
11036 if (h == NULL && opd->adjust != NULL)
11040 adjust = opd->adjust[sym->st_value / 8];
11042 /* Assume deleted functions won't ever be called. */
11044 sym_value += adjust;
11047 dest = opd_entry_value (sym_sec, sym_value,
11048 &sym_sec, NULL, FALSE);
11049 if (dest == (bfd_vma) -1)
11054 + sym_sec->output_offset
11055 + sym_sec->output_section->vma);
11057 /* Ignore branch to self. */
11058 if (sym_sec == isec)
11061 /* If the called function uses the toc, we need a stub. */
11062 if (sym_sec->has_toc_reloc
11063 || sym_sec->makes_toc_func_call)
11069 /* Assume any branch that needs a long branch stub might in fact
11070 need a plt_branch stub. A plt_branch stub uses r2. */
11071 else if (dest - (isec->output_offset
11072 + isec->output_section->vma
11073 + rel->r_offset) + (1 << 25) >= (2 << 25))
11079 /* If calling back to a section in the process of being
11080 tested, we can't say for sure that no toc adjusting stubs
11081 are needed, so don't return zero. */
11082 else if (sym_sec->call_check_in_progress)
11085 /* Branches to another section that itself doesn't have any TOC
11086 references are OK. Recursively call ourselves to check. */
11087 else if (!sym_sec->call_check_done)
11091 /* Mark current section as indeterminate, so that other
11092 sections that call back to current won't be marked as
11094 isec->call_check_in_progress = 1;
11095 recur = toc_adjusting_stub_needed (info, sym_sec);
11096 isec->call_check_in_progress = 0;
11107 if (local_syms != NULL
11108 && (elf_symtab_hdr (isec->owner).contents
11109 != (unsigned char *) local_syms))
11111 if (elf_section_data (isec)->relocs != relstart)
11116 && isec->map_head.s != NULL
11117 && (strcmp (isec->output_section->name, ".init") == 0
11118 || strcmp (isec->output_section->name, ".fini") == 0))
11120 if (isec->map_head.s->has_toc_reloc
11121 || isec->map_head.s->makes_toc_func_call)
11123 else if (!isec->map_head.s->call_check_done)
11126 isec->call_check_in_progress = 1;
11127 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11128 isec->call_check_in_progress = 0;
11135 isec->makes_toc_func_call = 1;
11140 /* The linker repeatedly calls this function for each input section,
11141 in the order that input sections are linked into output sections.
11142 Build lists of input sections to determine groupings between which
11143 we may insert linker stubs. */
11146 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11148 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11153 if ((isec->output_section->flags & SEC_CODE) != 0
11154 && isec->output_section->index <= htab->top_index)
11156 asection **list = htab->input_list + isec->output_section->index;
11157 /* Steal the link_sec pointer for our list. */
11158 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11159 /* This happens to make the list in reverse order,
11160 which is what we want. */
11161 PREV_SEC (isec) = *list;
11165 if (htab->multi_toc_needed)
11167 /* If a code section has a function that uses the TOC then we need
11168 to use the right TOC (obviously). Also, make sure that .opd gets
11169 the correct TOC value for R_PPC64_TOC relocs that don't have or
11170 can't find their function symbol (shouldn't ever happen now).
11171 Also specially treat .fixup for the linux kernel. .fixup
11172 contains branches, but only back to the function that hit an
11174 if (isec->has_toc_reloc
11175 || (isec->flags & SEC_CODE) == 0
11176 || strcmp (isec->name, ".fixup") == 0)
11178 if (elf_gp (isec->owner) != 0)
11179 htab->toc_curr = elf_gp (isec->owner);
11183 if (!isec->call_check_done
11184 && toc_adjusting_stub_needed (info, isec) < 0)
11186 /* If we make a local call from this section, ie. a branch
11187 without a following nop, then we have no place to put a
11188 toc restoring insn. We must use the same toc group as
11190 Testing makes_toc_func_call actually tests for *any*
11191 calls to functions that need a good toc pointer. A more
11192 precise test would be better, as this one will set
11193 incorrect values for pasted .init/.fini fragments.
11194 (Fixed later in check_pasted_section.) */
11195 if (isec->makes_toc_func_call
11196 && elf_gp (isec->owner) != 0)
11197 htab->toc_curr = elf_gp (isec->owner);
11201 /* Functions that don't use the TOC can belong in any TOC group.
11202 Use the last TOC base. */
11203 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11207 /* Check that all .init and .fini sections use the same toc, if they
11208 have toc relocs. */
11211 check_pasted_section (struct bfd_link_info *info, const char *name)
11213 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11217 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11218 bfd_vma toc_off = 0;
11221 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11222 if (i->has_toc_reloc)
11225 toc_off = htab->stub_group[i->id].toc_off;
11226 else if (toc_off != htab->stub_group[i->id].toc_off)
11231 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11232 if (i->makes_toc_func_call)
11234 toc_off = htab->stub_group[i->id].toc_off;
11238 /* Make sure the whole pasted function uses the same toc offset. */
11240 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11241 htab->stub_group[i->id].toc_off = toc_off;
11247 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11249 return (check_pasted_section (info, ".init")
11250 & check_pasted_section (info, ".fini"));
11253 /* See whether we can group stub sections together. Grouping stub
11254 sections may result in fewer stubs. More importantly, we need to
11255 put all .init* and .fini* stubs at the beginning of the .init or
11256 .fini output sections respectively, because glibc splits the
11257 _init and _fini functions into multiple parts. Putting a stub in
11258 the middle of a function is not a good idea. */
11261 group_sections (struct ppc_link_hash_table *htab,
11262 bfd_size_type stub_group_size,
11263 bfd_boolean stubs_always_before_branch)
11266 bfd_size_type stub14_group_size;
11267 bfd_boolean suppress_size_errors;
11269 suppress_size_errors = FALSE;
11270 stub14_group_size = stub_group_size;
11271 if (stub_group_size == 1)
11273 /* Default values. */
11274 if (stubs_always_before_branch)
11276 stub_group_size = 0x1e00000;
11277 stub14_group_size = 0x7800;
11281 stub_group_size = 0x1c00000;
11282 stub14_group_size = 0x7000;
11284 suppress_size_errors = TRUE;
11287 list = htab->input_list + htab->top_index;
11290 asection *tail = *list;
11291 while (tail != NULL)
11295 bfd_size_type total;
11296 bfd_boolean big_sec;
11300 total = tail->size;
11301 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11302 && ppc64_elf_section_data (tail)->has_14bit_branch
11303 ? stub14_group_size : stub_group_size);
11304 if (big_sec && !suppress_size_errors)
11305 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11306 tail->owner, tail);
11307 curr_toc = htab->stub_group[tail->id].toc_off;
11309 while ((prev = PREV_SEC (curr)) != NULL
11310 && ((total += curr->output_offset - prev->output_offset)
11311 < (ppc64_elf_section_data (prev) != NULL
11312 && ppc64_elf_section_data (prev)->has_14bit_branch
11313 ? stub14_group_size : stub_group_size))
11314 && htab->stub_group[prev->id].toc_off == curr_toc)
11317 /* OK, the size from the start of CURR to the end is less
11318 than stub_group_size and thus can be handled by one stub
11319 section. (or the tail section is itself larger than
11320 stub_group_size, in which case we may be toast.) We
11321 should really be keeping track of the total size of stubs
11322 added here, as stubs contribute to the final output
11323 section size. That's a little tricky, and this way will
11324 only break if stubs added make the total size more than
11325 2^25, ie. for the default stub_group_size, if stubs total
11326 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11329 prev = PREV_SEC (tail);
11330 /* Set up this stub group. */
11331 htab->stub_group[tail->id].link_sec = curr;
11333 while (tail != curr && (tail = prev) != NULL);
11335 /* But wait, there's more! Input sections up to stub_group_size
11336 bytes before the stub section can be handled by it too.
11337 Don't do this if we have a really large section after the
11338 stubs, as adding more stubs increases the chance that
11339 branches may not reach into the stub section. */
11340 if (!stubs_always_before_branch && !big_sec)
11343 while (prev != NULL
11344 && ((total += tail->output_offset - prev->output_offset)
11345 < (ppc64_elf_section_data (prev) != NULL
11346 && ppc64_elf_section_data (prev)->has_14bit_branch
11347 ? stub14_group_size : stub_group_size))
11348 && htab->stub_group[prev->id].toc_off == curr_toc)
11351 prev = PREV_SEC (tail);
11352 htab->stub_group[tail->id].link_sec = curr;
11358 while (list-- != htab->input_list);
11359 free (htab->input_list);
11363 static const unsigned char glink_eh_frame_cie[] =
11365 0, 0, 0, 16, /* length. */
11366 0, 0, 0, 0, /* id. */
11367 1, /* CIE version. */
11368 'z', 'R', 0, /* Augmentation string. */
11369 4, /* Code alignment. */
11370 0x78, /* Data alignment. */
11372 1, /* Augmentation size. */
11373 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11374 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11377 /* Stripping output sections is normally done before dynamic section
11378 symbols have been allocated. This function is called later, and
11379 handles cases like htab->brlt which is mapped to its own output
11383 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11385 if (isec->size == 0
11386 && isec->output_section->size == 0
11387 && !(isec->output_section->flags & SEC_KEEP)
11388 && !bfd_section_removed_from_list (info->output_bfd,
11389 isec->output_section)
11390 && elf_section_data (isec->output_section)->dynindx == 0)
11392 isec->output_section->flags |= SEC_EXCLUDE;
11393 bfd_section_list_remove (info->output_bfd, isec->output_section);
11394 info->output_bfd->section_count--;
11398 /* Determine and set the size of the stub section for a final link.
11400 The basic idea here is to examine all the relocations looking for
11401 PC-relative calls to a target that is unreachable with a "bl"
11405 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11406 bfd_boolean plt_static_chain, int plt_thread_safe,
11407 int plt_stub_align)
11409 bfd_size_type stub_group_size;
11410 bfd_boolean stubs_always_before_branch;
11411 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11416 htab->plt_static_chain = plt_static_chain;
11417 htab->plt_stub_align = plt_stub_align;
11418 if (plt_thread_safe == -1 && !info->executable)
11419 plt_thread_safe = 1;
11420 if (plt_thread_safe == -1)
11422 static const char *const thread_starter[] =
11426 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11428 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11429 "mq_notify", "create_timer",
11433 "GOMP_parallel_start",
11434 "GOMP_parallel_loop_static_start",
11435 "GOMP_parallel_loop_dynamic_start",
11436 "GOMP_parallel_loop_guided_start",
11437 "GOMP_parallel_loop_runtime_start",
11438 "GOMP_parallel_sections_start",
11442 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11444 struct elf_link_hash_entry *h;
11445 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11446 FALSE, FALSE, TRUE);
11447 plt_thread_safe = h != NULL && h->ref_regular;
11448 if (plt_thread_safe)
11452 htab->plt_thread_safe = plt_thread_safe;
11453 htab->dot_toc_dot = ((struct ppc_link_hash_entry *)
11454 elf_link_hash_lookup (&htab->elf, ".TOC.",
11455 FALSE, FALSE, TRUE));
11456 stubs_always_before_branch = group_size < 0;
11457 if (group_size < 0)
11458 stub_group_size = -group_size;
11460 stub_group_size = group_size;
11462 group_sections (htab, stub_group_size, stubs_always_before_branch);
11467 unsigned int bfd_indx;
11468 asection *stub_sec;
11470 htab->stub_iteration += 1;
11472 for (input_bfd = info->input_bfds, bfd_indx = 0;
11474 input_bfd = input_bfd->link_next, bfd_indx++)
11476 Elf_Internal_Shdr *symtab_hdr;
11478 Elf_Internal_Sym *local_syms = NULL;
11480 if (!is_ppc64_elf (input_bfd))
11483 /* We'll need the symbol table in a second. */
11484 symtab_hdr = &elf_symtab_hdr (input_bfd);
11485 if (symtab_hdr->sh_info == 0)
11488 /* Walk over each section attached to the input bfd. */
11489 for (section = input_bfd->sections;
11491 section = section->next)
11493 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11495 /* If there aren't any relocs, then there's nothing more
11497 if ((section->flags & SEC_RELOC) == 0
11498 || (section->flags & SEC_ALLOC) == 0
11499 || (section->flags & SEC_LOAD) == 0
11500 || (section->flags & SEC_CODE) == 0
11501 || section->reloc_count == 0)
11504 /* If this section is a link-once section that will be
11505 discarded, then don't create any stubs. */
11506 if (section->output_section == NULL
11507 || section->output_section->owner != info->output_bfd)
11510 /* Get the relocs. */
11512 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11513 info->keep_memory);
11514 if (internal_relocs == NULL)
11515 goto error_ret_free_local;
11517 /* Now examine each relocation. */
11518 irela = internal_relocs;
11519 irelaend = irela + section->reloc_count;
11520 for (; irela < irelaend; irela++)
11522 enum elf_ppc64_reloc_type r_type;
11523 unsigned int r_indx;
11524 enum ppc_stub_type stub_type;
11525 struct ppc_stub_hash_entry *stub_entry;
11526 asection *sym_sec, *code_sec;
11527 bfd_vma sym_value, code_value;
11528 bfd_vma destination;
11529 bfd_boolean ok_dest;
11530 struct ppc_link_hash_entry *hash;
11531 struct ppc_link_hash_entry *fdh;
11532 struct elf_link_hash_entry *h;
11533 Elf_Internal_Sym *sym;
11535 const asection *id_sec;
11536 struct _opd_sec_data *opd;
11537 struct plt_entry *plt_ent;
11539 r_type = ELF64_R_TYPE (irela->r_info);
11540 r_indx = ELF64_R_SYM (irela->r_info);
11542 if (r_type >= R_PPC64_max)
11544 bfd_set_error (bfd_error_bad_value);
11545 goto error_ret_free_internal;
11548 /* Only look for stubs on branch instructions. */
11549 if (r_type != R_PPC64_REL24
11550 && r_type != R_PPC64_REL14
11551 && r_type != R_PPC64_REL14_BRTAKEN
11552 && r_type != R_PPC64_REL14_BRNTAKEN)
11555 /* Now determine the call target, its name, value,
11557 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11558 r_indx, input_bfd))
11559 goto error_ret_free_internal;
11560 hash = (struct ppc_link_hash_entry *) h;
11567 sym_value = sym->st_value;
11570 else if (hash->elf.root.type == bfd_link_hash_defined
11571 || hash->elf.root.type == bfd_link_hash_defweak)
11573 sym_value = hash->elf.root.u.def.value;
11574 if (sym_sec->output_section != NULL)
11577 else if (hash->elf.root.type == bfd_link_hash_undefweak
11578 || hash->elf.root.type == bfd_link_hash_undefined)
11580 /* Recognise an old ABI func code entry sym, and
11581 use the func descriptor sym instead if it is
11583 if (hash->elf.root.root.string[0] == '.'
11584 && (fdh = lookup_fdh (hash, htab)) != NULL)
11586 if (fdh->elf.root.type == bfd_link_hash_defined
11587 || fdh->elf.root.type == bfd_link_hash_defweak)
11589 sym_sec = fdh->elf.root.u.def.section;
11590 sym_value = fdh->elf.root.u.def.value;
11591 if (sym_sec->output_section != NULL)
11600 bfd_set_error (bfd_error_bad_value);
11601 goto error_ret_free_internal;
11607 sym_value += irela->r_addend;
11608 destination = (sym_value
11609 + sym_sec->output_offset
11610 + sym_sec->output_section->vma);
11613 code_sec = sym_sec;
11614 code_value = sym_value;
11615 opd = get_opd_info (sym_sec);
11620 if (hash == NULL && opd->adjust != NULL)
11622 long adjust = opd->adjust[sym_value / 8];
11625 code_value += adjust;
11626 sym_value += adjust;
11628 dest = opd_entry_value (sym_sec, sym_value,
11629 &code_sec, &code_value, FALSE);
11630 if (dest != (bfd_vma) -1)
11632 destination = dest;
11635 /* Fixup old ABI sym to point at code
11637 hash->elf.root.type = bfd_link_hash_defweak;
11638 hash->elf.root.u.def.section = code_sec;
11639 hash->elf.root.u.def.value = code_value;
11644 /* Determine what (if any) linker stub is needed. */
11646 stub_type = ppc_type_of_stub (section, irela, &hash,
11647 &plt_ent, destination);
11649 if (stub_type != ppc_stub_plt_call)
11651 /* Check whether we need a TOC adjusting stub.
11652 Since the linker pastes together pieces from
11653 different object files when creating the
11654 _init and _fini functions, it may be that a
11655 call to what looks like a local sym is in
11656 fact a call needing a TOC adjustment. */
11657 if (code_sec != NULL
11658 && code_sec->output_section != NULL
11659 && (htab->stub_group[code_sec->id].toc_off
11660 != htab->stub_group[section->id].toc_off)
11661 && (code_sec->has_toc_reloc
11662 || code_sec->makes_toc_func_call))
11663 stub_type = ppc_stub_long_branch_r2off;
11666 if (stub_type == ppc_stub_none)
11669 /* __tls_get_addr calls might be eliminated. */
11670 if (stub_type != ppc_stub_plt_call
11672 && (hash == htab->tls_get_addr
11673 || hash == htab->tls_get_addr_fd)
11674 && section->has_tls_reloc
11675 && irela != internal_relocs)
11677 /* Get tls info. */
11678 unsigned char *tls_mask;
11680 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11681 irela - 1, input_bfd))
11682 goto error_ret_free_internal;
11683 if (*tls_mask != 0)
11687 if (stub_type == ppc_stub_plt_call
11688 && irela + 1 < irelaend
11689 && irela[1].r_offset == irela->r_offset + 4
11690 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11692 if (!tocsave_find (htab, INSERT,
11693 &local_syms, irela + 1, input_bfd))
11694 goto error_ret_free_internal;
11696 else if (stub_type == ppc_stub_plt_call)
11697 stub_type = ppc_stub_plt_call_r2save;
11699 /* Support for grouping stub sections. */
11700 id_sec = htab->stub_group[section->id].link_sec;
11702 /* Get the name of this stub. */
11703 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11705 goto error_ret_free_internal;
11707 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11708 stub_name, FALSE, FALSE);
11709 if (stub_entry != NULL)
11711 /* The proper stub has already been created. */
11713 if (stub_type == ppc_stub_plt_call_r2save)
11714 stub_entry->stub_type = stub_type;
11718 stub_entry = ppc_add_stub (stub_name, section, info);
11719 if (stub_entry == NULL)
11722 error_ret_free_internal:
11723 if (elf_section_data (section)->relocs == NULL)
11724 free (internal_relocs);
11725 error_ret_free_local:
11726 if (local_syms != NULL
11727 && (symtab_hdr->contents
11728 != (unsigned char *) local_syms))
11733 stub_entry->stub_type = stub_type;
11734 if (stub_type != ppc_stub_plt_call
11735 && stub_type != ppc_stub_plt_call_r2save)
11737 stub_entry->target_value = code_value;
11738 stub_entry->target_section = code_sec;
11742 stub_entry->target_value = sym_value;
11743 stub_entry->target_section = sym_sec;
11745 stub_entry->h = hash;
11746 stub_entry->plt_ent = plt_ent;
11747 stub_entry->addend = irela->r_addend;
11749 if (stub_entry->h != NULL)
11750 htab->stub_globals += 1;
11753 /* We're done with the internal relocs, free them. */
11754 if (elf_section_data (section)->relocs != internal_relocs)
11755 free (internal_relocs);
11758 if (local_syms != NULL
11759 && symtab_hdr->contents != (unsigned char *) local_syms)
11761 if (!info->keep_memory)
11764 symtab_hdr->contents = (unsigned char *) local_syms;
11768 /* We may have added some stubs. Find out the new size of the
11770 for (stub_sec = htab->stub_bfd->sections;
11772 stub_sec = stub_sec->next)
11773 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11775 stub_sec->rawsize = stub_sec->size;
11776 stub_sec->size = 0;
11777 stub_sec->reloc_count = 0;
11778 stub_sec->flags &= ~SEC_RELOC;
11781 htab->brlt->size = 0;
11782 htab->brlt->reloc_count = 0;
11783 htab->brlt->flags &= ~SEC_RELOC;
11784 if (htab->relbrlt != NULL)
11785 htab->relbrlt->size = 0;
11787 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11789 if (info->emitrelocations
11790 && htab->glink != NULL && htab->glink->size != 0)
11792 htab->glink->reloc_count = 1;
11793 htab->glink->flags |= SEC_RELOC;
11796 if (htab->glink_eh_frame != NULL
11797 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11798 && htab->glink_eh_frame->output_section->size != 0)
11800 size_t size = 0, align;
11802 for (stub_sec = htab->stub_bfd->sections;
11804 stub_sec = stub_sec->next)
11805 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11807 if (htab->glink != NULL && htab->glink->size != 0)
11810 size += sizeof (glink_eh_frame_cie);
11812 align <<= htab->glink_eh_frame->output_section->alignment_power;
11814 size = (size + align) & ~align;
11815 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11816 htab->glink_eh_frame->size = size;
11819 if (htab->plt_stub_align != 0)
11820 for (stub_sec = htab->stub_bfd->sections;
11822 stub_sec = stub_sec->next)
11823 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11824 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11825 & (-1 << htab->plt_stub_align));
11827 for (stub_sec = htab->stub_bfd->sections;
11829 stub_sec = stub_sec->next)
11830 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11831 && stub_sec->rawsize != stub_sec->size)
11834 /* Exit from this loop when no stubs have been added, and no stubs
11835 have changed size. */
11836 if (stub_sec == NULL
11837 && (htab->glink_eh_frame == NULL
11838 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11841 /* Ask the linker to do its stuff. */
11842 (*htab->layout_sections_again) ();
11845 maybe_strip_output (info, htab->brlt);
11846 if (htab->glink_eh_frame != NULL)
11847 maybe_strip_output (info, htab->glink_eh_frame);
11852 /* Called after we have determined section placement. If sections
11853 move, we'll be called again. Provide a value for TOCstart. */
11856 ppc64_elf_toc (bfd *obfd)
11861 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11862 order. The TOC starts where the first of these sections starts. */
11863 s = bfd_get_section_by_name (obfd, ".got");
11864 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11865 s = bfd_get_section_by_name (obfd, ".toc");
11866 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11867 s = bfd_get_section_by_name (obfd, ".tocbss");
11868 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11869 s = bfd_get_section_by_name (obfd, ".plt");
11870 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11872 /* This may happen for
11873 o references to TOC base (SYM@toc / TOC[tc0]) without a
11875 o bad linker script
11876 o --gc-sections and empty TOC sections
11878 FIXME: Warn user? */
11880 /* Look for a likely section. We probably won't even be
11882 for (s = obfd->sections; s != NULL; s = s->next)
11883 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11885 == (SEC_ALLOC | SEC_SMALL_DATA))
11888 for (s = obfd->sections; s != NULL; s = s->next)
11889 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11890 == (SEC_ALLOC | SEC_SMALL_DATA))
11893 for (s = obfd->sections; s != NULL; s = s->next)
11894 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11898 for (s = obfd->sections; s != NULL; s = s->next)
11899 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11905 TOCstart = s->output_section->vma + s->output_offset;
11910 /* Build all the stubs associated with the current output file.
11911 The stubs are kept in a hash table attached to the main linker
11912 hash table. This function is called via gldelf64ppc_finish. */
11915 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11916 struct bfd_link_info *info,
11919 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11920 asection *stub_sec;
11922 int stub_sec_count = 0;
11927 htab->emit_stub_syms = emit_stub_syms;
11929 /* Allocate memory to hold the linker stubs. */
11930 for (stub_sec = htab->stub_bfd->sections;
11932 stub_sec = stub_sec->next)
11933 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11934 && stub_sec->size != 0)
11936 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11937 if (stub_sec->contents == NULL)
11939 /* We want to check that built size is the same as calculated
11940 size. rawsize is a convenient location to use. */
11941 stub_sec->rawsize = stub_sec->size;
11942 stub_sec->size = 0;
11945 if (htab->glink != NULL && htab->glink->size != 0)
11950 /* Build the .glink plt call stub. */
11951 if (htab->emit_stub_syms)
11953 struct elf_link_hash_entry *h;
11954 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11955 TRUE, FALSE, FALSE);
11958 if (h->root.type == bfd_link_hash_new)
11960 h->root.type = bfd_link_hash_defined;
11961 h->root.u.def.section = htab->glink;
11962 h->root.u.def.value = 8;
11963 h->ref_regular = 1;
11964 h->def_regular = 1;
11965 h->ref_regular_nonweak = 1;
11966 h->forced_local = 1;
11970 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11971 if (info->emitrelocations)
11973 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11976 r->r_offset = (htab->glink->output_offset
11977 + htab->glink->output_section->vma);
11978 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11979 r->r_addend = plt0;
11981 p = htab->glink->contents;
11982 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11983 bfd_put_64 (htab->glink->owner, plt0, p);
11985 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11987 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11989 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11991 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11993 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11995 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11997 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11999 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
12001 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
12003 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
12005 bfd_put_32 (htab->glink->owner, BCTR, p);
12007 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12009 bfd_put_32 (htab->glink->owner, NOP, p);
12013 /* Build the .glink lazy link call stubs. */
12015 while (p < htab->glink->contents + htab->glink->size)
12019 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12024 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12026 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
12029 bfd_put_32 (htab->glink->owner,
12030 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12034 htab->glink->rawsize = p - htab->glink->contents;
12037 if (htab->brlt->size != 0)
12039 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12041 if (htab->brlt->contents == NULL)
12044 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12046 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12047 htab->relbrlt->size);
12048 if (htab->relbrlt->contents == NULL)
12052 if (htab->glink_eh_frame != NULL
12053 && htab->glink_eh_frame->size != 0)
12056 bfd_byte *last_fde;
12057 size_t last_fde_len, size, align, pad;
12059 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12062 htab->glink_eh_frame->contents = p;
12065 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12067 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12068 /* CIE length (rewrite in case little-endian). */
12069 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12070 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12071 p += sizeof (glink_eh_frame_cie);
12073 for (stub_sec = htab->stub_bfd->sections;
12075 stub_sec = stub_sec->next)
12076 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12081 bfd_put_32 (htab->elf.dynobj, 16, p);
12084 val = p - htab->glink_eh_frame->contents;
12085 bfd_put_32 (htab->elf.dynobj, val, p);
12087 /* Offset to stub section. */
12088 val = (stub_sec->output_section->vma
12089 + stub_sec->output_offset);
12090 val -= (htab->glink_eh_frame->output_section->vma
12091 + htab->glink_eh_frame->output_offset);
12092 val -= p - htab->glink_eh_frame->contents;
12093 if (val + 0x80000000 > 0xffffffff)
12095 info->callbacks->einfo
12096 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12100 bfd_put_32 (htab->elf.dynobj, val, p);
12102 /* stub section size. */
12103 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12105 /* Augmentation. */
12110 if (htab->glink != NULL && htab->glink->size != 0)
12115 bfd_put_32 (htab->elf.dynobj, 20, p);
12118 val = p - htab->glink_eh_frame->contents;
12119 bfd_put_32 (htab->elf.dynobj, val, p);
12121 /* Offset to .glink. */
12122 val = (htab->glink->output_section->vma
12123 + htab->glink->output_offset
12125 val -= (htab->glink_eh_frame->output_section->vma
12126 + htab->glink_eh_frame->output_offset);
12127 val -= p - htab->glink_eh_frame->contents;
12128 if (val + 0x80000000 > 0xffffffff)
12130 info->callbacks->einfo
12131 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12132 htab->glink->name);
12135 bfd_put_32 (htab->elf.dynobj, val, p);
12138 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
12140 /* Augmentation. */
12143 *p++ = DW_CFA_advance_loc + 1;
12144 *p++ = DW_CFA_register;
12147 *p++ = DW_CFA_advance_loc + 4;
12148 *p++ = DW_CFA_restore_extended;
12151 /* Subsume any padding into the last FDE if user .eh_frame
12152 sections are aligned more than glink_eh_frame. Otherwise any
12153 zero padding will be seen as a terminator. */
12154 size = p - htab->glink_eh_frame->contents;
12156 align <<= htab->glink_eh_frame->output_section->alignment_power;
12158 pad = ((size + align) & ~align) - size;
12159 htab->glink_eh_frame->size = size + pad;
12160 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12163 /* Build the stubs as directed by the stub hash table. */
12164 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12166 if (htab->relbrlt != NULL)
12167 htab->relbrlt->reloc_count = 0;
12169 if (htab->plt_stub_align != 0)
12170 for (stub_sec = htab->stub_bfd->sections;
12172 stub_sec = stub_sec->next)
12173 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12174 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12175 & (-1 << htab->plt_stub_align));
12177 for (stub_sec = htab->stub_bfd->sections;
12179 stub_sec = stub_sec->next)
12180 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12182 stub_sec_count += 1;
12183 if (stub_sec->rawsize != stub_sec->size)
12187 if (stub_sec != NULL
12188 || htab->glink->rawsize != htab->glink->size
12189 || (htab->glink_eh_frame != NULL
12190 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12192 htab->stub_error = TRUE;
12193 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12196 if (htab->stub_error)
12201 *stats = bfd_malloc (500);
12202 if (*stats == NULL)
12205 sprintf (*stats, _("linker stubs in %u group%s\n"
12207 " toc adjust %lu\n"
12208 " long branch %lu\n"
12209 " long toc adj %lu\n"
12211 " plt call toc %lu"),
12213 stub_sec_count == 1 ? "" : "s",
12214 htab->stub_count[ppc_stub_long_branch - 1],
12215 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12216 htab->stub_count[ppc_stub_plt_branch - 1],
12217 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12218 htab->stub_count[ppc_stub_plt_call - 1],
12219 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12224 /* This function undoes the changes made by add_symbol_adjust. */
12227 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12229 struct ppc_link_hash_entry *eh;
12231 if (h->root.type == bfd_link_hash_indirect)
12234 eh = (struct ppc_link_hash_entry *) h;
12235 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12238 eh->elf.root.type = bfd_link_hash_undefined;
12243 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12245 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12248 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12251 /* What to do when ld finds relocations against symbols defined in
12252 discarded sections. */
12254 static unsigned int
12255 ppc64_elf_action_discarded (asection *sec)
12257 if (strcmp (".opd", sec->name) == 0)
12260 if (strcmp (".toc", sec->name) == 0)
12263 if (strcmp (".toc1", sec->name) == 0)
12266 return _bfd_elf_default_action_discarded (sec);
12269 /* The RELOCATE_SECTION function is called by the ELF backend linker
12270 to handle the relocations for a section.
12272 The relocs are always passed as Rela structures; if the section
12273 actually uses Rel structures, the r_addend field will always be
12276 This function is responsible for adjust the section contents as
12277 necessary, and (if using Rela relocs and generating a
12278 relocatable output file) adjusting the reloc addend as
12281 This function does not have to worry about setting the reloc
12282 address or the reloc symbol index.
12284 LOCAL_SYMS is a pointer to the swapped in local symbols.
12286 LOCAL_SECTIONS is an array giving the section in the input file
12287 corresponding to the st_shndx field of each local symbol.
12289 The global hash table entry for the global symbols can be found
12290 via elf_sym_hashes (input_bfd).
12292 When generating relocatable output, this function must handle
12293 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12294 going to be the section symbol corresponding to the output
12295 section, which means that the addend must be adjusted
12299 ppc64_elf_relocate_section (bfd *output_bfd,
12300 struct bfd_link_info *info,
12302 asection *input_section,
12303 bfd_byte *contents,
12304 Elf_Internal_Rela *relocs,
12305 Elf_Internal_Sym *local_syms,
12306 asection **local_sections)
12308 struct ppc_link_hash_table *htab;
12309 Elf_Internal_Shdr *symtab_hdr;
12310 struct elf_link_hash_entry **sym_hashes;
12311 Elf_Internal_Rela *rel;
12312 Elf_Internal_Rela *relend;
12313 Elf_Internal_Rela outrel;
12315 struct got_entry **local_got_ents;
12317 bfd_boolean ret = TRUE;
12318 bfd_boolean is_opd;
12319 /* Assume 'at' branch hints. */
12320 bfd_boolean is_isa_v2 = TRUE;
12321 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12323 /* Initialize howto table if needed. */
12324 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12327 htab = ppc_hash_table (info);
12331 /* Don't relocate stub sections. */
12332 if (input_section->owner == htab->stub_bfd)
12335 BFD_ASSERT (is_ppc64_elf (input_bfd));
12337 local_got_ents = elf_local_got_ents (input_bfd);
12338 TOCstart = elf_gp (output_bfd);
12339 symtab_hdr = &elf_symtab_hdr (input_bfd);
12340 sym_hashes = elf_sym_hashes (input_bfd);
12341 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12344 relend = relocs + input_section->reloc_count;
12345 for (; rel < relend; rel++)
12347 enum elf_ppc64_reloc_type r_type;
12349 bfd_reloc_status_type r;
12350 Elf_Internal_Sym *sym;
12352 struct elf_link_hash_entry *h_elf;
12353 struct ppc_link_hash_entry *h;
12354 struct ppc_link_hash_entry *fdh;
12355 const char *sym_name;
12356 unsigned long r_symndx, toc_symndx;
12357 bfd_vma toc_addend;
12358 unsigned char tls_mask, tls_gd, tls_type;
12359 unsigned char sym_type;
12360 bfd_vma relocation;
12361 bfd_boolean unresolved_reloc;
12362 bfd_boolean warned;
12363 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12366 struct ppc_stub_hash_entry *stub_entry;
12367 bfd_vma max_br_offset;
12369 const Elf_Internal_Rela orig_rel = *rel;
12371 r_type = ELF64_R_TYPE (rel->r_info);
12372 r_symndx = ELF64_R_SYM (rel->r_info);
12374 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12375 symbol of the previous ADDR64 reloc. The symbol gives us the
12376 proper TOC base to use. */
12377 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12379 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12381 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12387 unresolved_reloc = FALSE;
12390 if (r_symndx < symtab_hdr->sh_info)
12392 /* It's a local symbol. */
12393 struct _opd_sec_data *opd;
12395 sym = local_syms + r_symndx;
12396 sec = local_sections[r_symndx];
12397 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12398 sym_type = ELF64_ST_TYPE (sym->st_info);
12399 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12400 opd = get_opd_info (sec);
12401 if (opd != NULL && opd->adjust != NULL)
12403 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12408 /* If this is a relocation against the opd section sym
12409 and we have edited .opd, adjust the reloc addend so
12410 that ld -r and ld --emit-relocs output is correct.
12411 If it is a reloc against some other .opd symbol,
12412 then the symbol value will be adjusted later. */
12413 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12414 rel->r_addend += adjust;
12416 relocation += adjust;
12422 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12423 r_symndx, symtab_hdr, sym_hashes,
12424 h_elf, sec, relocation,
12425 unresolved_reloc, warned);
12426 sym_name = h_elf->root.root.string;
12427 sym_type = h_elf->type;
12429 && sec->owner == output_bfd
12430 && strcmp (sec->name, ".opd") == 0)
12432 /* This is a symbol defined in a linker script. All
12433 such are defined in output sections, even those
12434 defined by simple assignment from a symbol defined in
12435 an input section. Transfer the symbol to an
12436 appropriate input .opd section, so that a branch to
12437 this symbol will be mapped to the location specified
12438 by the opd entry. */
12439 struct bfd_link_order *lo;
12440 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
12441 if (lo->type == bfd_indirect_link_order)
12443 asection *isec = lo->u.indirect.section;
12444 if (h_elf->root.u.def.value >= isec->output_offset
12445 && h_elf->root.u.def.value < (isec->output_offset
12448 h_elf->root.u.def.value -= isec->output_offset;
12449 h_elf->root.u.def.section = isec;
12455 if (h_elf == &htab->dot_toc_dot->elf)
12457 relocation = (TOCstart
12458 + htab->stub_group[input_section->id].toc_off);
12459 sec = bfd_abs_section_ptr;
12460 unresolved_reloc = FALSE;
12463 h = (struct ppc_link_hash_entry *) h_elf;
12465 if (sec != NULL && discarded_section (sec))
12466 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12468 ppc64_elf_howto_table[r_type], 0,
12471 if (info->relocatable)
12474 /* TLS optimizations. Replace instruction sequences and relocs
12475 based on information we collected in tls_optimize. We edit
12476 RELOCS so that --emit-relocs will output something sensible
12477 for the final instruction stream. */
12482 tls_mask = h->tls_mask;
12483 else if (local_got_ents != NULL)
12485 struct plt_entry **local_plt = (struct plt_entry **)
12486 (local_got_ents + symtab_hdr->sh_info);
12487 unsigned char *lgot_masks = (unsigned char *)
12488 (local_plt + symtab_hdr->sh_info);
12489 tls_mask = lgot_masks[r_symndx];
12492 && (r_type == R_PPC64_TLS
12493 || r_type == R_PPC64_TLSGD
12494 || r_type == R_PPC64_TLSLD))
12496 /* Check for toc tls entries. */
12497 unsigned char *toc_tls;
12499 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12500 &local_syms, rel, input_bfd))
12504 tls_mask = *toc_tls;
12507 /* Check that tls relocs are used with tls syms, and non-tls
12508 relocs are used with non-tls syms. */
12509 if (r_symndx != STN_UNDEF
12510 && r_type != R_PPC64_NONE
12512 || h->elf.root.type == bfd_link_hash_defined
12513 || h->elf.root.type == bfd_link_hash_defweak)
12514 && (IS_PPC64_TLS_RELOC (r_type)
12515 != (sym_type == STT_TLS
12516 || (sym_type == STT_SECTION
12517 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12520 && (r_type == R_PPC64_TLS
12521 || r_type == R_PPC64_TLSGD
12522 || r_type == R_PPC64_TLSLD))
12523 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12526 info->callbacks->einfo
12527 (!IS_PPC64_TLS_RELOC (r_type)
12528 ? _("%P: %H: %s used with TLS symbol `%T'\n")
12529 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
12530 input_bfd, input_section, rel->r_offset,
12531 ppc64_elf_howto_table[r_type]->name,
12535 /* Ensure reloc mapping code below stays sane. */
12536 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12537 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12538 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12539 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12540 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12541 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12542 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12543 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12544 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12545 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12553 case R_PPC64_LO_DS_OPT:
12554 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12555 if ((insn & (0x3f << 26)) != 58u << 26)
12557 insn += (14u << 26) - (58u << 26);
12558 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12559 r_type = R_PPC64_TOC16_LO;
12560 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12563 case R_PPC64_TOC16:
12564 case R_PPC64_TOC16_LO:
12565 case R_PPC64_TOC16_DS:
12566 case R_PPC64_TOC16_LO_DS:
12568 /* Check for toc tls entries. */
12569 unsigned char *toc_tls;
12572 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12573 &local_syms, rel, input_bfd);
12579 tls_mask = *toc_tls;
12580 if (r_type == R_PPC64_TOC16_DS
12581 || r_type == R_PPC64_TOC16_LO_DS)
12584 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12589 /* If we found a GD reloc pair, then we might be
12590 doing a GD->IE transition. */
12593 tls_gd = TLS_TPRELGD;
12594 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12597 else if (retval == 3)
12599 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12607 case R_PPC64_GOT_TPREL16_HI:
12608 case R_PPC64_GOT_TPREL16_HA:
12610 && (tls_mask & TLS_TPREL) == 0)
12612 rel->r_offset -= d_offset;
12613 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12614 r_type = R_PPC64_NONE;
12615 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12619 case R_PPC64_GOT_TPREL16_DS:
12620 case R_PPC64_GOT_TPREL16_LO_DS:
12622 && (tls_mask & TLS_TPREL) == 0)
12625 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12627 insn |= 0x3c0d0000; /* addis 0,13,0 */
12628 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12629 r_type = R_PPC64_TPREL16_HA;
12630 if (toc_symndx != 0)
12632 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12633 rel->r_addend = toc_addend;
12634 /* We changed the symbol. Start over in order to
12635 get h, sym, sec etc. right. */
12640 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12646 && (tls_mask & TLS_TPREL) == 0)
12648 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12649 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12652 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12653 /* Was PPC64_TLS which sits on insn boundary, now
12654 PPC64_TPREL16_LO which is at low-order half-word. */
12655 rel->r_offset += d_offset;
12656 r_type = R_PPC64_TPREL16_LO;
12657 if (toc_symndx != 0)
12659 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12660 rel->r_addend = toc_addend;
12661 /* We changed the symbol. Start over in order to
12662 get h, sym, sec etc. right. */
12667 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12671 case R_PPC64_GOT_TLSGD16_HI:
12672 case R_PPC64_GOT_TLSGD16_HA:
12673 tls_gd = TLS_TPRELGD;
12674 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12678 case R_PPC64_GOT_TLSLD16_HI:
12679 case R_PPC64_GOT_TLSLD16_HA:
12680 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12683 if ((tls_mask & tls_gd) != 0)
12684 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12685 + R_PPC64_GOT_TPREL16_DS);
12688 rel->r_offset -= d_offset;
12689 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12690 r_type = R_PPC64_NONE;
12692 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12696 case R_PPC64_GOT_TLSGD16:
12697 case R_PPC64_GOT_TLSGD16_LO:
12698 tls_gd = TLS_TPRELGD;
12699 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12703 case R_PPC64_GOT_TLSLD16:
12704 case R_PPC64_GOT_TLSLD16_LO:
12705 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12707 unsigned int insn1, insn2, insn3;
12711 offset = (bfd_vma) -1;
12712 /* If not using the newer R_PPC64_TLSGD/LD to mark
12713 __tls_get_addr calls, we must trust that the call
12714 stays with its arg setup insns, ie. that the next
12715 reloc is the __tls_get_addr call associated with
12716 the current reloc. Edit both insns. */
12717 if (input_section->has_tls_get_addr_call
12718 && rel + 1 < relend
12719 && branch_reloc_hash_match (input_bfd, rel + 1,
12720 htab->tls_get_addr,
12721 htab->tls_get_addr_fd))
12722 offset = rel[1].r_offset;
12723 if ((tls_mask & tls_gd) != 0)
12726 insn1 = bfd_get_32 (output_bfd,
12727 contents + rel->r_offset - d_offset);
12728 insn1 &= (1 << 26) - (1 << 2);
12729 insn1 |= 58 << 26; /* ld */
12730 insn2 = 0x7c636a14; /* add 3,3,13 */
12731 if (offset != (bfd_vma) -1)
12732 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12733 if ((tls_mask & TLS_EXPLICIT) == 0)
12734 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12735 + R_PPC64_GOT_TPREL16_DS);
12737 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12738 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12743 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12744 insn2 = 0x38630000; /* addi 3,3,0 */
12747 /* Was an LD reloc. */
12749 sec = local_sections[toc_symndx];
12751 r_symndx < symtab_hdr->sh_info;
12753 if (local_sections[r_symndx] == sec)
12755 if (r_symndx >= symtab_hdr->sh_info)
12756 r_symndx = STN_UNDEF;
12757 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12758 if (r_symndx != STN_UNDEF)
12759 rel->r_addend -= (local_syms[r_symndx].st_value
12760 + sec->output_offset
12761 + sec->output_section->vma);
12763 else if (toc_symndx != 0)
12765 r_symndx = toc_symndx;
12766 rel->r_addend = toc_addend;
12768 r_type = R_PPC64_TPREL16_HA;
12769 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12770 if (offset != (bfd_vma) -1)
12772 rel[1].r_info = ELF64_R_INFO (r_symndx,
12773 R_PPC64_TPREL16_LO);
12774 rel[1].r_offset = offset + d_offset;
12775 rel[1].r_addend = rel->r_addend;
12778 bfd_put_32 (output_bfd, insn1,
12779 contents + rel->r_offset - d_offset);
12780 if (offset != (bfd_vma) -1)
12782 insn3 = bfd_get_32 (output_bfd,
12783 contents + offset + 4);
12785 || insn3 == CROR_151515 || insn3 == CROR_313131)
12787 rel[1].r_offset += 4;
12788 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12791 bfd_put_32 (output_bfd, insn2, contents + offset);
12793 if ((tls_mask & tls_gd) == 0
12794 && (tls_gd == 0 || toc_symndx != 0))
12796 /* We changed the symbol. Start over in order
12797 to get h, sym, sec etc. right. */
12804 case R_PPC64_TLSGD:
12805 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12807 unsigned int insn2, insn3;
12808 bfd_vma offset = rel->r_offset;
12810 if ((tls_mask & TLS_TPRELGD) != 0)
12813 r_type = R_PPC64_NONE;
12814 insn2 = 0x7c636a14; /* add 3,3,13 */
12819 if (toc_symndx != 0)
12821 r_symndx = toc_symndx;
12822 rel->r_addend = toc_addend;
12824 r_type = R_PPC64_TPREL16_LO;
12825 rel->r_offset = offset + d_offset;
12826 insn2 = 0x38630000; /* addi 3,3,0 */
12828 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12829 /* Zap the reloc on the _tls_get_addr call too. */
12830 BFD_ASSERT (offset == rel[1].r_offset);
12831 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12832 insn3 = bfd_get_32 (output_bfd,
12833 contents + offset + 4);
12835 || insn3 == CROR_151515 || insn3 == CROR_313131)
12837 rel->r_offset += 4;
12838 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12841 bfd_put_32 (output_bfd, insn2, contents + offset);
12842 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12850 case R_PPC64_TLSLD:
12851 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12853 unsigned int insn2, insn3;
12854 bfd_vma offset = rel->r_offset;
12857 sec = local_sections[toc_symndx];
12859 r_symndx < symtab_hdr->sh_info;
12861 if (local_sections[r_symndx] == sec)
12863 if (r_symndx >= symtab_hdr->sh_info)
12864 r_symndx = STN_UNDEF;
12865 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12866 if (r_symndx != STN_UNDEF)
12867 rel->r_addend -= (local_syms[r_symndx].st_value
12868 + sec->output_offset
12869 + sec->output_section->vma);
12871 r_type = R_PPC64_TPREL16_LO;
12872 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12873 rel->r_offset = offset + d_offset;
12874 /* Zap the reloc on the _tls_get_addr call too. */
12875 BFD_ASSERT (offset == rel[1].r_offset);
12876 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12877 insn2 = 0x38630000; /* addi 3,3,0 */
12878 insn3 = bfd_get_32 (output_bfd,
12879 contents + offset + 4);
12881 || insn3 == CROR_151515 || insn3 == CROR_313131)
12883 rel->r_offset += 4;
12884 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12887 bfd_put_32 (output_bfd, insn2, contents + offset);
12893 case R_PPC64_DTPMOD64:
12894 if (rel + 1 < relend
12895 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12896 && rel[1].r_offset == rel->r_offset + 8)
12898 if ((tls_mask & TLS_GD) == 0)
12900 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12901 if ((tls_mask & TLS_TPRELGD) != 0)
12902 r_type = R_PPC64_TPREL64;
12905 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12906 r_type = R_PPC64_NONE;
12908 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12913 if ((tls_mask & TLS_LD) == 0)
12915 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12916 r_type = R_PPC64_NONE;
12917 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12922 case R_PPC64_TPREL64:
12923 if ((tls_mask & TLS_TPREL) == 0)
12925 r_type = R_PPC64_NONE;
12926 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12931 /* Handle other relocations that tweak non-addend part of insn. */
12933 max_br_offset = 1 << 25;
12934 addend = rel->r_addend;
12935 reloc_dest = DEST_NORMAL;
12941 case R_PPC64_TOCSAVE:
12942 if (relocation + addend == (rel->r_offset
12943 + input_section->output_offset
12944 + input_section->output_section->vma)
12945 && tocsave_find (htab, NO_INSERT,
12946 &local_syms, rel, input_bfd))
12948 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12950 || insn == CROR_151515 || insn == CROR_313131)
12951 bfd_put_32 (input_bfd, STD_R2_40R1,
12952 contents + rel->r_offset);
12956 /* Branch taken prediction relocations. */
12957 case R_PPC64_ADDR14_BRTAKEN:
12958 case R_PPC64_REL14_BRTAKEN:
12959 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12962 /* Branch not taken prediction relocations. */
12963 case R_PPC64_ADDR14_BRNTAKEN:
12964 case R_PPC64_REL14_BRNTAKEN:
12965 insn |= bfd_get_32 (output_bfd,
12966 contents + rel->r_offset) & ~(0x01 << 21);
12969 case R_PPC64_REL14:
12970 max_br_offset = 1 << 15;
12973 case R_PPC64_REL24:
12974 /* Calls to functions with a different TOC, such as calls to
12975 shared objects, need to alter the TOC pointer. This is
12976 done using a linkage stub. A REL24 branching to these
12977 linkage stubs needs to be followed by a nop, as the nop
12978 will be replaced with an instruction to restore the TOC
12983 && h->oh->is_func_descriptor)
12984 fdh = ppc_follow_link (h->oh);
12985 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
12987 if (stub_entry != NULL
12988 && (stub_entry->stub_type == ppc_stub_plt_call
12989 || stub_entry->stub_type == ppc_stub_plt_call_r2save
12990 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12991 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12993 bfd_boolean can_plt_call = FALSE;
12995 if (rel->r_offset + 8 <= input_section->size)
12998 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13000 || nop == CROR_151515 || nop == CROR_313131)
13003 && (h == htab->tls_get_addr_fd
13004 || h == htab->tls_get_addr)
13005 && !htab->no_tls_get_addr_opt)
13007 /* Special stub used, leave nop alone. */
13010 bfd_put_32 (input_bfd, LD_R2_40R1,
13011 contents + rel->r_offset + 4);
13012 can_plt_call = TRUE;
13018 if (stub_entry->stub_type == ppc_stub_plt_call
13019 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13021 /* If this is a plain branch rather than a branch
13022 and link, don't require a nop. However, don't
13023 allow tail calls in a shared library as they
13024 will result in r2 being corrupted. */
13026 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
13027 if (info->executable && (br & 1) == 0)
13028 can_plt_call = TRUE;
13033 && strcmp (h->elf.root.root.string,
13034 ".__libc_start_main") == 0)
13036 /* Allow crt1 branch to go via a toc adjusting stub. */
13037 can_plt_call = TRUE;
13041 info->callbacks->einfo
13042 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13043 "recompile with -fPIC"),
13044 input_bfd, input_section, rel->r_offset, sym_name);
13046 bfd_set_error (bfd_error_bad_value);
13052 && (stub_entry->stub_type == ppc_stub_plt_call
13053 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13054 unresolved_reloc = FALSE;
13057 if ((stub_entry == NULL
13058 || stub_entry->stub_type == ppc_stub_long_branch
13059 || stub_entry->stub_type == ppc_stub_plt_branch)
13060 && get_opd_info (sec) != NULL)
13062 /* The branch destination is the value of the opd entry. */
13063 bfd_vma off = (relocation + addend
13064 - sec->output_section->vma
13065 - sec->output_offset);
13066 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13067 if (dest != (bfd_vma) -1)
13071 reloc_dest = DEST_OPD;
13075 /* If the branch is out of reach we ought to have a long
13077 from = (rel->r_offset
13078 + input_section->output_offset
13079 + input_section->output_section->vma);
13081 if (stub_entry != NULL
13082 && (stub_entry->stub_type == ppc_stub_long_branch
13083 || stub_entry->stub_type == ppc_stub_plt_branch)
13084 && (r_type == R_PPC64_ADDR14_BRTAKEN
13085 || r_type == R_PPC64_ADDR14_BRNTAKEN
13086 || (relocation + addend - from + max_br_offset
13087 < 2 * max_br_offset)))
13088 /* Don't use the stub if this branch is in range. */
13091 if (stub_entry != NULL)
13093 /* Munge up the value and addend so that we call the stub
13094 rather than the procedure directly. */
13095 relocation = (stub_entry->stub_offset
13096 + stub_entry->stub_sec->output_offset
13097 + stub_entry->stub_sec->output_section->vma);
13099 reloc_dest = DEST_STUB;
13101 if ((stub_entry->stub_type == ppc_stub_plt_call
13102 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13103 && (ALWAYS_EMIT_R2SAVE
13104 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13105 && rel + 1 < relend
13106 && rel[1].r_offset == rel->r_offset + 4
13107 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13115 /* Set 'a' bit. This is 0b00010 in BO field for branch
13116 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13117 for branch on CTR insns (BO == 1a00t or 1a01t). */
13118 if ((insn & (0x14 << 21)) == (0x04 << 21))
13119 insn |= 0x02 << 21;
13120 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13121 insn |= 0x08 << 21;
13127 /* Invert 'y' bit if not the default. */
13128 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13129 insn ^= 0x01 << 21;
13132 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13135 /* NOP out calls to undefined weak functions.
13136 We can thus call a weak function without first
13137 checking whether the function is defined. */
13139 && h->elf.root.type == bfd_link_hash_undefweak
13140 && h->elf.dynindx == -1
13141 && r_type == R_PPC64_REL24
13145 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13151 /* Set `addend'. */
13156 info->callbacks->einfo
13157 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13158 input_bfd, (int) r_type, sym_name);
13160 bfd_set_error (bfd_error_bad_value);
13166 case R_PPC64_TLSGD:
13167 case R_PPC64_TLSLD:
13168 case R_PPC64_TOCSAVE:
13169 case R_PPC64_GNU_VTINHERIT:
13170 case R_PPC64_GNU_VTENTRY:
13173 /* GOT16 relocations. Like an ADDR16 using the symbol's
13174 address in the GOT as relocation value instead of the
13175 symbol's value itself. Also, create a GOT entry for the
13176 symbol and put the symbol value there. */
13177 case R_PPC64_GOT_TLSGD16:
13178 case R_PPC64_GOT_TLSGD16_LO:
13179 case R_PPC64_GOT_TLSGD16_HI:
13180 case R_PPC64_GOT_TLSGD16_HA:
13181 tls_type = TLS_TLS | TLS_GD;
13184 case R_PPC64_GOT_TLSLD16:
13185 case R_PPC64_GOT_TLSLD16_LO:
13186 case R_PPC64_GOT_TLSLD16_HI:
13187 case R_PPC64_GOT_TLSLD16_HA:
13188 tls_type = TLS_TLS | TLS_LD;
13191 case R_PPC64_GOT_TPREL16_DS:
13192 case R_PPC64_GOT_TPREL16_LO_DS:
13193 case R_PPC64_GOT_TPREL16_HI:
13194 case R_PPC64_GOT_TPREL16_HA:
13195 tls_type = TLS_TLS | TLS_TPREL;
13198 case R_PPC64_GOT_DTPREL16_DS:
13199 case R_PPC64_GOT_DTPREL16_LO_DS:
13200 case R_PPC64_GOT_DTPREL16_HI:
13201 case R_PPC64_GOT_DTPREL16_HA:
13202 tls_type = TLS_TLS | TLS_DTPREL;
13205 case R_PPC64_GOT16:
13206 case R_PPC64_GOT16_LO:
13207 case R_PPC64_GOT16_HI:
13208 case R_PPC64_GOT16_HA:
13209 case R_PPC64_GOT16_DS:
13210 case R_PPC64_GOT16_LO_DS:
13213 /* Relocation is to the entry for this symbol in the global
13218 unsigned long indx = 0;
13219 struct got_entry *ent;
13221 if (tls_type == (TLS_TLS | TLS_LD)
13223 || !h->elf.def_dynamic))
13224 ent = ppc64_tlsld_got (input_bfd);
13230 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13231 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13234 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13235 /* This is actually a static link, or it is a
13236 -Bsymbolic link and the symbol is defined
13237 locally, or the symbol was forced to be local
13238 because of a version file. */
13242 BFD_ASSERT (h->elf.dynindx != -1);
13243 indx = h->elf.dynindx;
13244 unresolved_reloc = FALSE;
13246 ent = h->elf.got.glist;
13250 if (local_got_ents == NULL)
13252 ent = local_got_ents[r_symndx];
13255 for (; ent != NULL; ent = ent->next)
13256 if (ent->addend == orig_rel.r_addend
13257 && ent->owner == input_bfd
13258 && ent->tls_type == tls_type)
13264 if (ent->is_indirect)
13265 ent = ent->got.ent;
13266 offp = &ent->got.offset;
13267 got = ppc64_elf_tdata (ent->owner)->got;
13271 /* The offset must always be a multiple of 8. We use the
13272 least significant bit to record whether we have already
13273 processed this entry. */
13275 if ((off & 1) != 0)
13279 /* Generate relocs for the dynamic linker, except in
13280 the case of TLSLD where we'll use one entry per
13288 ? h->elf.type == STT_GNU_IFUNC
13289 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13291 relgot = htab->reliplt;
13292 else if ((info->shared || indx != 0)
13294 || (tls_type == (TLS_TLS | TLS_LD)
13295 && !h->elf.def_dynamic)
13296 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13297 || h->elf.root.type != bfd_link_hash_undefweak))
13298 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13299 if (relgot != NULL)
13301 outrel.r_offset = (got->output_section->vma
13302 + got->output_offset
13304 outrel.r_addend = addend;
13305 if (tls_type & (TLS_LD | TLS_GD))
13307 outrel.r_addend = 0;
13308 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13309 if (tls_type == (TLS_TLS | TLS_GD))
13311 loc = relgot->contents;
13312 loc += (relgot->reloc_count++
13313 * sizeof (Elf64_External_Rela));
13314 bfd_elf64_swap_reloca_out (output_bfd,
13316 outrel.r_offset += 8;
13317 outrel.r_addend = addend;
13319 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13322 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13323 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13324 else if (tls_type == (TLS_TLS | TLS_TPREL))
13325 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13326 else if (indx != 0)
13327 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13331 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13333 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13335 /* Write the .got section contents for the sake
13337 loc = got->contents + off;
13338 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13342 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13344 outrel.r_addend += relocation;
13345 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13346 outrel.r_addend -= htab->elf.tls_sec->vma;
13348 loc = relgot->contents;
13349 loc += (relgot->reloc_count++
13350 * sizeof (Elf64_External_Rela));
13351 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13354 /* Init the .got section contents here if we're not
13355 emitting a reloc. */
13358 relocation += addend;
13359 if (tls_type == (TLS_TLS | TLS_LD))
13361 else if (tls_type != 0)
13363 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13364 if (tls_type == (TLS_TLS | TLS_TPREL))
13365 relocation += DTP_OFFSET - TP_OFFSET;
13367 if (tls_type == (TLS_TLS | TLS_GD))
13369 bfd_put_64 (output_bfd, relocation,
13370 got->contents + off + 8);
13375 bfd_put_64 (output_bfd, relocation,
13376 got->contents + off);
13380 if (off >= (bfd_vma) -2)
13383 relocation = got->output_section->vma + got->output_offset + off;
13384 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13388 case R_PPC64_PLT16_HA:
13389 case R_PPC64_PLT16_HI:
13390 case R_PPC64_PLT16_LO:
13391 case R_PPC64_PLT32:
13392 case R_PPC64_PLT64:
13393 /* Relocation is to the entry for this symbol in the
13394 procedure linkage table. */
13396 /* Resolve a PLT reloc against a local symbol directly,
13397 without using the procedure linkage table. */
13401 /* It's possible that we didn't make a PLT entry for this
13402 symbol. This happens when statically linking PIC code,
13403 or when using -Bsymbolic. Go find a match if there is a
13405 if (htab->plt != NULL)
13407 struct plt_entry *ent;
13408 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13409 if (ent->addend == orig_rel.r_addend
13410 && ent->plt.offset != (bfd_vma) -1)
13412 relocation = (htab->plt->output_section->vma
13413 + htab->plt->output_offset
13414 + ent->plt.offset);
13415 unresolved_reloc = FALSE;
13421 /* Relocation value is TOC base. */
13422 relocation = TOCstart;
13423 if (r_symndx == STN_UNDEF)
13424 relocation += htab->stub_group[input_section->id].toc_off;
13425 else if (unresolved_reloc)
13427 else if (sec != NULL && sec->id <= htab->top_id)
13428 relocation += htab->stub_group[sec->id].toc_off;
13430 unresolved_reloc = TRUE;
13433 /* TOC16 relocs. We want the offset relative to the TOC base,
13434 which is the address of the start of the TOC plus 0x8000.
13435 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13437 case R_PPC64_TOC16:
13438 case R_PPC64_TOC16_LO:
13439 case R_PPC64_TOC16_HI:
13440 case R_PPC64_TOC16_DS:
13441 case R_PPC64_TOC16_LO_DS:
13442 case R_PPC64_TOC16_HA:
13443 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13446 /* Relocate against the beginning of the section. */
13447 case R_PPC64_SECTOFF:
13448 case R_PPC64_SECTOFF_LO:
13449 case R_PPC64_SECTOFF_HI:
13450 case R_PPC64_SECTOFF_DS:
13451 case R_PPC64_SECTOFF_LO_DS:
13452 case R_PPC64_SECTOFF_HA:
13454 addend -= sec->output_section->vma;
13457 case R_PPC64_REL16:
13458 case R_PPC64_REL16_LO:
13459 case R_PPC64_REL16_HI:
13460 case R_PPC64_REL16_HA:
13463 case R_PPC64_REL14:
13464 case R_PPC64_REL14_BRNTAKEN:
13465 case R_PPC64_REL14_BRTAKEN:
13466 case R_PPC64_REL24:
13469 case R_PPC64_TPREL16:
13470 case R_PPC64_TPREL16_LO:
13471 case R_PPC64_TPREL16_HI:
13472 case R_PPC64_TPREL16_HA:
13473 case R_PPC64_TPREL16_DS:
13474 case R_PPC64_TPREL16_LO_DS:
13475 case R_PPC64_TPREL16_HIGHER:
13476 case R_PPC64_TPREL16_HIGHERA:
13477 case R_PPC64_TPREL16_HIGHEST:
13478 case R_PPC64_TPREL16_HIGHESTA:
13480 && h->elf.root.type == bfd_link_hash_undefweak
13481 && h->elf.dynindx == -1)
13483 /* Make this relocation against an undefined weak symbol
13484 resolve to zero. This is really just a tweak, since
13485 code using weak externs ought to check that they are
13486 defined before using them. */
13487 bfd_byte *p = contents + rel->r_offset - d_offset;
13489 insn = bfd_get_32 (output_bfd, p);
13490 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13492 bfd_put_32 (output_bfd, insn, p);
13495 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13497 /* The TPREL16 relocs shouldn't really be used in shared
13498 libs as they will result in DT_TEXTREL being set, but
13499 support them anyway. */
13503 case R_PPC64_DTPREL16:
13504 case R_PPC64_DTPREL16_LO:
13505 case R_PPC64_DTPREL16_HI:
13506 case R_PPC64_DTPREL16_HA:
13507 case R_PPC64_DTPREL16_DS:
13508 case R_PPC64_DTPREL16_LO_DS:
13509 case R_PPC64_DTPREL16_HIGHER:
13510 case R_PPC64_DTPREL16_HIGHERA:
13511 case R_PPC64_DTPREL16_HIGHEST:
13512 case R_PPC64_DTPREL16_HIGHESTA:
13513 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13516 case R_PPC64_DTPMOD64:
13521 case R_PPC64_TPREL64:
13522 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13525 case R_PPC64_DTPREL64:
13526 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13529 /* Relocations that may need to be propagated if this is a
13531 case R_PPC64_REL30:
13532 case R_PPC64_REL32:
13533 case R_PPC64_REL64:
13534 case R_PPC64_ADDR14:
13535 case R_PPC64_ADDR14_BRNTAKEN:
13536 case R_PPC64_ADDR14_BRTAKEN:
13537 case R_PPC64_ADDR16:
13538 case R_PPC64_ADDR16_DS:
13539 case R_PPC64_ADDR16_HA:
13540 case R_PPC64_ADDR16_HI:
13541 case R_PPC64_ADDR16_HIGHER:
13542 case R_PPC64_ADDR16_HIGHERA:
13543 case R_PPC64_ADDR16_HIGHEST:
13544 case R_PPC64_ADDR16_HIGHESTA:
13545 case R_PPC64_ADDR16_LO:
13546 case R_PPC64_ADDR16_LO_DS:
13547 case R_PPC64_ADDR24:
13548 case R_PPC64_ADDR32:
13549 case R_PPC64_ADDR64:
13550 case R_PPC64_UADDR16:
13551 case R_PPC64_UADDR32:
13552 case R_PPC64_UADDR64:
13554 if ((input_section->flags & SEC_ALLOC) == 0)
13557 if (NO_OPD_RELOCS && is_opd)
13562 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13563 || h->elf.root.type != bfd_link_hash_undefweak)
13564 && (must_be_dyn_reloc (info, r_type)
13565 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13566 || (ELIMINATE_COPY_RELOCS
13569 && h->elf.dynindx != -1
13570 && !h->elf.non_got_ref
13571 && !h->elf.def_regular)
13574 ? h->elf.type == STT_GNU_IFUNC
13575 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13577 bfd_boolean skip, relocate;
13581 /* When generating a dynamic object, these relocations
13582 are copied into the output file to be resolved at run
13588 out_off = _bfd_elf_section_offset (output_bfd, info,
13589 input_section, rel->r_offset);
13590 if (out_off == (bfd_vma) -1)
13592 else if (out_off == (bfd_vma) -2)
13593 skip = TRUE, relocate = TRUE;
13594 out_off += (input_section->output_section->vma
13595 + input_section->output_offset);
13596 outrel.r_offset = out_off;
13597 outrel.r_addend = rel->r_addend;
13599 /* Optimize unaligned reloc use. */
13600 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13601 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13602 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13603 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13604 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13605 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13606 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13607 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13608 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13611 memset (&outrel, 0, sizeof outrel);
13612 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13614 && r_type != R_PPC64_TOC)
13616 BFD_ASSERT (h->elf.dynindx != -1);
13617 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13621 /* This symbol is local, or marked to become local,
13622 or this is an opd section reloc which must point
13623 at a local function. */
13624 outrel.r_addend += relocation;
13625 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13627 if (is_opd && h != NULL)
13629 /* Lie about opd entries. This case occurs
13630 when building shared libraries and we
13631 reference a function in another shared
13632 lib. The same thing happens for a weak
13633 definition in an application that's
13634 overridden by a strong definition in a
13635 shared lib. (I believe this is a generic
13636 bug in binutils handling of weak syms.)
13637 In these cases we won't use the opd
13638 entry in this lib. */
13639 unresolved_reloc = FALSE;
13642 && r_type == R_PPC64_ADDR64
13644 ? h->elf.type == STT_GNU_IFUNC
13645 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13646 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13649 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13651 /* We need to relocate .opd contents for ld.so.
13652 Prelink also wants simple and consistent rules
13653 for relocs. This make all RELATIVE relocs have
13654 *r_offset equal to r_addend. */
13663 ? h->elf.type == STT_GNU_IFUNC
13664 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13666 info->callbacks->einfo
13667 (_("%P: %H: %s for indirect "
13668 "function `%T' unsupported\n"),
13669 input_bfd, input_section, rel->r_offset,
13670 ppc64_elf_howto_table[r_type]->name,
13674 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13676 else if (sec == NULL || sec->owner == NULL)
13678 bfd_set_error (bfd_error_bad_value);
13685 osec = sec->output_section;
13686 indx = elf_section_data (osec)->dynindx;
13690 if ((osec->flags & SEC_READONLY) == 0
13691 && htab->elf.data_index_section != NULL)
13692 osec = htab->elf.data_index_section;
13694 osec = htab->elf.text_index_section;
13695 indx = elf_section_data (osec)->dynindx;
13697 BFD_ASSERT (indx != 0);
13699 /* We are turning this relocation into one
13700 against a section symbol, so subtract out
13701 the output section's address but not the
13702 offset of the input section in the output
13704 outrel.r_addend -= osec->vma;
13707 outrel.r_info = ELF64_R_INFO (indx, r_type);
13711 sreloc = elf_section_data (input_section)->sreloc;
13713 ? h->elf.type == STT_GNU_IFUNC
13714 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13715 sreloc = htab->reliplt;
13716 if (sreloc == NULL)
13719 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13722 loc = sreloc->contents;
13723 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13724 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13726 /* If this reloc is against an external symbol, it will
13727 be computed at runtime, so there's no need to do
13728 anything now. However, for the sake of prelink ensure
13729 that the section contents are a known value. */
13732 unresolved_reloc = FALSE;
13733 /* The value chosen here is quite arbitrary as ld.so
13734 ignores section contents except for the special
13735 case of .opd where the contents might be accessed
13736 before relocation. Choose zero, as that won't
13737 cause reloc overflow. */
13740 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13741 to improve backward compatibility with older
13743 if (r_type == R_PPC64_ADDR64)
13744 addend = outrel.r_addend;
13745 /* Adjust pc_relative relocs to have zero in *r_offset. */
13746 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13747 addend = (input_section->output_section->vma
13748 + input_section->output_offset
13755 case R_PPC64_GLOB_DAT:
13756 case R_PPC64_JMP_SLOT:
13757 case R_PPC64_JMP_IREL:
13758 case R_PPC64_RELATIVE:
13759 /* We shouldn't ever see these dynamic relocs in relocatable
13761 /* Fall through. */
13763 case R_PPC64_PLTGOT16:
13764 case R_PPC64_PLTGOT16_DS:
13765 case R_PPC64_PLTGOT16_HA:
13766 case R_PPC64_PLTGOT16_HI:
13767 case R_PPC64_PLTGOT16_LO:
13768 case R_PPC64_PLTGOT16_LO_DS:
13769 case R_PPC64_PLTREL32:
13770 case R_PPC64_PLTREL64:
13771 /* These ones haven't been implemented yet. */
13773 info->callbacks->einfo
13774 (_("%P: %B: %s is not supported for `%T'\n"),
13776 ppc64_elf_howto_table[r_type]->name, sym_name);
13778 bfd_set_error (bfd_error_invalid_operation);
13783 /* Multi-instruction sequences that access the TOC can be
13784 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13785 to nop; addi rb,r2,x; */
13791 case R_PPC64_GOT_TLSLD16_HI:
13792 case R_PPC64_GOT_TLSGD16_HI:
13793 case R_PPC64_GOT_TPREL16_HI:
13794 case R_PPC64_GOT_DTPREL16_HI:
13795 case R_PPC64_GOT16_HI:
13796 case R_PPC64_TOC16_HI:
13797 /* These relocs would only be useful if building up an
13798 offset to later add to r2, perhaps in an indexed
13799 addressing mode instruction. Don't try to optimize.
13800 Unfortunately, the possibility of someone building up an
13801 offset like this or even with the HA relocs, means that
13802 we need to check the high insn when optimizing the low
13806 case R_PPC64_GOT_TLSLD16_HA:
13807 case R_PPC64_GOT_TLSGD16_HA:
13808 case R_PPC64_GOT_TPREL16_HA:
13809 case R_PPC64_GOT_DTPREL16_HA:
13810 case R_PPC64_GOT16_HA:
13811 case R_PPC64_TOC16_HA:
13812 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13813 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13815 bfd_byte *p = contents + (rel->r_offset & ~3);
13816 bfd_put_32 (input_bfd, NOP, p);
13820 case R_PPC64_GOT_TLSLD16_LO:
13821 case R_PPC64_GOT_TLSGD16_LO:
13822 case R_PPC64_GOT_TPREL16_LO_DS:
13823 case R_PPC64_GOT_DTPREL16_LO_DS:
13824 case R_PPC64_GOT16_LO:
13825 case R_PPC64_GOT16_LO_DS:
13826 case R_PPC64_TOC16_LO:
13827 case R_PPC64_TOC16_LO_DS:
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 insn = bfd_get_32 (input_bfd, p);
13833 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13835 /* Transform addic to addi when we change reg. */
13836 insn &= ~((0x3f << 26) | (0x1f << 16));
13837 insn |= (14u << 26) | (2 << 16);
13841 insn &= ~(0x1f << 16);
13844 bfd_put_32 (input_bfd, insn, p);
13849 /* Do any further special processing. */
13855 case R_PPC64_ADDR16_HA:
13856 case R_PPC64_REL16_HA:
13857 case R_PPC64_ADDR16_HIGHERA:
13858 case R_PPC64_ADDR16_HIGHESTA:
13859 case R_PPC64_TOC16_HA:
13860 case R_PPC64_SECTOFF_HA:
13861 case R_PPC64_TPREL16_HA:
13862 case R_PPC64_DTPREL16_HA:
13863 case R_PPC64_TPREL16_HIGHER:
13864 case R_PPC64_TPREL16_HIGHERA:
13865 case R_PPC64_TPREL16_HIGHEST:
13866 case R_PPC64_TPREL16_HIGHESTA:
13867 case R_PPC64_DTPREL16_HIGHER:
13868 case R_PPC64_DTPREL16_HIGHERA:
13869 case R_PPC64_DTPREL16_HIGHEST:
13870 case R_PPC64_DTPREL16_HIGHESTA:
13871 /* It's just possible that this symbol is a weak symbol
13872 that's not actually defined anywhere. In that case,
13873 'sec' would be NULL, and we should leave the symbol
13874 alone (it will be set to zero elsewhere in the link). */
13879 case R_PPC64_GOT16_HA:
13880 case R_PPC64_PLTGOT16_HA:
13881 case R_PPC64_PLT16_HA:
13882 case R_PPC64_GOT_TLSGD16_HA:
13883 case R_PPC64_GOT_TLSLD16_HA:
13884 case R_PPC64_GOT_TPREL16_HA:
13885 case R_PPC64_GOT_DTPREL16_HA:
13886 /* Add 0x10000 if sign bit in 0:15 is set.
13887 Bits 0:15 are not used. */
13891 case R_PPC64_ADDR16_DS:
13892 case R_PPC64_ADDR16_LO_DS:
13893 case R_PPC64_GOT16_DS:
13894 case R_PPC64_GOT16_LO_DS:
13895 case R_PPC64_PLT16_LO_DS:
13896 case R_PPC64_SECTOFF_DS:
13897 case R_PPC64_SECTOFF_LO_DS:
13898 case R_PPC64_TOC16_DS:
13899 case R_PPC64_TOC16_LO_DS:
13900 case R_PPC64_PLTGOT16_DS:
13901 case R_PPC64_PLTGOT16_LO_DS:
13902 case R_PPC64_GOT_TPREL16_DS:
13903 case R_PPC64_GOT_TPREL16_LO_DS:
13904 case R_PPC64_GOT_DTPREL16_DS:
13905 case R_PPC64_GOT_DTPREL16_LO_DS:
13906 case R_PPC64_TPREL16_DS:
13907 case R_PPC64_TPREL16_LO_DS:
13908 case R_PPC64_DTPREL16_DS:
13909 case R_PPC64_DTPREL16_LO_DS:
13910 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13912 /* If this reloc is against an lq insn, then the value must be
13913 a multiple of 16. This is somewhat of a hack, but the
13914 "correct" way to do this by defining _DQ forms of all the
13915 _DS relocs bloats all reloc switches in this file. It
13916 doesn't seem to make much sense to use any of these relocs
13917 in data, so testing the insn should be safe. */
13918 if ((insn & (0x3f << 26)) == (56u << 26))
13920 if (((relocation + addend) & mask) != 0)
13922 info->callbacks->einfo
13923 (_("%P: %H: error: %s not a multiple of %u\n"),
13924 input_bfd, input_section, rel->r_offset,
13925 ppc64_elf_howto_table[r_type]->name,
13927 bfd_set_error (bfd_error_bad_value);
13934 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13935 because such sections are not SEC_ALLOC and thus ld.so will
13936 not process them. */
13937 if (unresolved_reloc
13938 && !((input_section->flags & SEC_DEBUGGING) != 0
13939 && h->elf.def_dynamic)
13940 && _bfd_elf_section_offset (output_bfd, info, input_section,
13941 rel->r_offset) != (bfd_vma) -1)
13943 info->callbacks->einfo
13944 (_("%P: %H: unresolvable %s against `%T'\n"),
13945 input_bfd, input_section, rel->r_offset,
13946 ppc64_elf_howto_table[(int) r_type]->name,
13947 h->elf.root.root.string);
13951 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13959 if (r != bfd_reloc_ok)
13961 char *more_info = NULL;
13962 const char *reloc_name = ppc64_elf_howto_table[r_type]->name;
13964 if (reloc_dest != DEST_NORMAL)
13966 more_info = bfd_malloc (strlen (reloc_name) + 8);
13967 if (more_info != NULL)
13969 strcpy (more_info, reloc_name);
13970 strcat (more_info, (reloc_dest == DEST_OPD
13971 ? " (OPD)" : " (stub)"));
13972 reloc_name = more_info;
13976 if (r == bfd_reloc_overflow)
13981 && h->elf.root.type == bfd_link_hash_undefweak
13982 && ppc64_elf_howto_table[r_type]->pc_relative)
13984 /* Assume this is a call protected by other code that
13985 detects the symbol is undefined. If this is the case,
13986 we can safely ignore the overflow. If not, the
13987 program is hosed anyway, and a little warning isn't
13993 if (!((*info->callbacks->reloc_overflow)
13994 (info, &h->elf.root, sym_name,
13995 reloc_name, orig_rel.r_addend,
13996 input_bfd, input_section, rel->r_offset)))
14001 info->callbacks->einfo
14002 (_("%P: %H: %s against `%T': error %d\n"),
14003 input_bfd, input_section, rel->r_offset,
14004 reloc_name, sym_name, (int) r);
14007 if (more_info != NULL)
14012 /* If we're emitting relocations, then shortly after this function
14013 returns, reloc offsets and addends for this section will be
14014 adjusted. Worse, reloc symbol indices will be for the output
14015 file rather than the input. Save a copy of the relocs for
14016 opd_entry_value. */
14017 if (is_opd && (info->emitrelocations || info->relocatable))
14020 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14021 rel = bfd_alloc (input_bfd, amt);
14022 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
14023 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
14026 memcpy (rel, relocs, amt);
14031 /* Adjust the value of any local symbols in opd sections. */
14034 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14035 const char *name ATTRIBUTE_UNUSED,
14036 Elf_Internal_Sym *elfsym,
14037 asection *input_sec,
14038 struct elf_link_hash_entry *h)
14040 struct _opd_sec_data *opd;
14047 opd = get_opd_info (input_sec);
14048 if (opd == NULL || opd->adjust == NULL)
14051 value = elfsym->st_value - input_sec->output_offset;
14052 if (!info->relocatable)
14053 value -= input_sec->output_section->vma;
14055 adjust = opd->adjust[value / 8];
14059 elfsym->st_value += adjust;
14063 /* Finish up dynamic symbol handling. We set the contents of various
14064 dynamic sections here. */
14067 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14068 struct bfd_link_info *info,
14069 struct elf_link_hash_entry *h,
14070 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14072 struct ppc_link_hash_table *htab;
14073 struct plt_entry *ent;
14074 Elf_Internal_Rela rela;
14077 htab = ppc_hash_table (info);
14081 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14082 if (ent->plt.offset != (bfd_vma) -1)
14084 /* This symbol has an entry in the procedure linkage
14085 table. Set it up. */
14086 if (!htab->elf.dynamic_sections_created
14087 || h->dynindx == -1)
14089 BFD_ASSERT (h->type == STT_GNU_IFUNC
14091 && (h->root.type == bfd_link_hash_defined
14092 || h->root.type == bfd_link_hash_defweak));
14093 rela.r_offset = (htab->iplt->output_section->vma
14094 + htab->iplt->output_offset
14095 + ent->plt.offset);
14096 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14097 rela.r_addend = (h->root.u.def.value
14098 + h->root.u.def.section->output_offset
14099 + h->root.u.def.section->output_section->vma
14101 loc = (htab->reliplt->contents
14102 + (htab->reliplt->reloc_count++
14103 * sizeof (Elf64_External_Rela)));
14107 rela.r_offset = (htab->plt->output_section->vma
14108 + htab->plt->output_offset
14109 + ent->plt.offset);
14110 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14111 rela.r_addend = ent->addend;
14112 loc = (htab->relplt->contents
14113 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
14114 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
14116 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14121 /* This symbol needs a copy reloc. Set it up. */
14123 if (h->dynindx == -1
14124 || (h->root.type != bfd_link_hash_defined
14125 && h->root.type != bfd_link_hash_defweak)
14126 || htab->relbss == NULL)
14129 rela.r_offset = (h->root.u.def.value
14130 + h->root.u.def.section->output_section->vma
14131 + h->root.u.def.section->output_offset);
14132 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14134 loc = htab->relbss->contents;
14135 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14136 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14142 /* Used to decide how to sort relocs in an optimal manner for the
14143 dynamic linker, before writing them out. */
14145 static enum elf_reloc_type_class
14146 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14147 const asection *rel_sec,
14148 const Elf_Internal_Rela *rela)
14150 enum elf_ppc64_reloc_type r_type;
14151 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14153 if (rel_sec == htab->reliplt)
14154 return reloc_class_ifunc;
14156 r_type = ELF64_R_TYPE (rela->r_info);
14159 case R_PPC64_RELATIVE:
14160 return reloc_class_relative;
14161 case R_PPC64_JMP_SLOT:
14162 return reloc_class_plt;
14164 return reloc_class_copy;
14166 return reloc_class_normal;
14170 /* Finish up the dynamic sections. */
14173 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14174 struct bfd_link_info *info)
14176 struct ppc_link_hash_table *htab;
14180 htab = ppc_hash_table (info);
14184 dynobj = htab->elf.dynobj;
14185 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14187 if (htab->elf.dynamic_sections_created)
14189 Elf64_External_Dyn *dyncon, *dynconend;
14191 if (sdyn == NULL || htab->got == NULL)
14194 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14195 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14196 for (; dyncon < dynconend; dyncon++)
14198 Elf_Internal_Dyn dyn;
14201 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14208 case DT_PPC64_GLINK:
14210 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14211 /* We stupidly defined DT_PPC64_GLINK to be the start
14212 of glink rather than the first entry point, which is
14213 what ld.so needs, and now have a bigger stub to
14214 support automatic multiple TOCs. */
14215 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
14219 s = bfd_get_section_by_name (output_bfd, ".opd");
14222 dyn.d_un.d_ptr = s->vma;
14225 case DT_PPC64_OPDSZ:
14226 s = bfd_get_section_by_name (output_bfd, ".opd");
14229 dyn.d_un.d_val = s->size;
14234 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14239 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14243 dyn.d_un.d_val = htab->relplt->size;
14247 /* Don't count procedure linkage table relocs in the
14248 overall reloc count. */
14252 dyn.d_un.d_val -= s->size;
14256 /* We may not be using the standard ELF linker script.
14257 If .rela.plt is the first .rela section, we adjust
14258 DT_RELA to not include it. */
14262 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14264 dyn.d_un.d_ptr += s->size;
14268 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14272 if (htab->got != NULL && htab->got->size != 0)
14274 /* Fill in the first entry in the global offset table.
14275 We use it to hold the link-time TOCbase. */
14276 bfd_put_64 (output_bfd,
14277 elf_gp (output_bfd) + TOC_BASE_OFF,
14278 htab->got->contents);
14280 /* Set .got entry size. */
14281 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14284 if (htab->plt != NULL && htab->plt->size != 0)
14286 /* Set .plt entry size. */
14287 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14291 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14292 brlt ourselves if emitrelocations. */
14293 if (htab->brlt != NULL
14294 && htab->brlt->reloc_count != 0
14295 && !_bfd_elf_link_output_relocs (output_bfd,
14297 elf_section_data (htab->brlt)->rela.hdr,
14298 elf_section_data (htab->brlt)->relocs,
14302 if (htab->glink != NULL
14303 && htab->glink->reloc_count != 0
14304 && !_bfd_elf_link_output_relocs (output_bfd,
14306 elf_section_data (htab->glink)->rela.hdr,
14307 elf_section_data (htab->glink)->relocs,
14312 if (htab->glink_eh_frame != NULL
14313 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
14314 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14315 htab->glink_eh_frame,
14316 htab->glink_eh_frame->contents))
14319 /* We need to handle writing out multiple GOT sections ourselves,
14320 since we didn't add them to DYNOBJ. We know dynobj is the first
14322 while ((dynobj = dynobj->link_next) != NULL)
14326 if (!is_ppc64_elf (dynobj))
14329 s = ppc64_elf_tdata (dynobj)->got;
14332 && s->output_section != bfd_abs_section_ptr
14333 && !bfd_set_section_contents (output_bfd, s->output_section,
14334 s->contents, s->output_offset,
14337 s = ppc64_elf_tdata (dynobj)->relgot;
14340 && s->output_section != bfd_abs_section_ptr
14341 && !bfd_set_section_contents (output_bfd, s->output_section,
14342 s->contents, s->output_offset,
14350 #include "elf64-target.h"
14352 /* FreeBSD support */
14354 #undef TARGET_LITTLE_SYM
14355 #undef TARGET_LITTLE_NAME
14357 #undef TARGET_BIG_SYM
14358 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14359 #undef TARGET_BIG_NAME
14360 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14363 #define ELF_OSABI ELFOSABI_FREEBSD
14366 #define elf64_bed elf64_powerpc_fbsd_bed
14368 #include "elf64-target.h"