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1/* PowerPC64-specific support for 64-bit ELF.
2 Copyright (C) 1999-2017 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22
23
24/* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28#include "sysdep.h"
29#include <stdarg.h>
30#include "bfd.h"
31#include "bfdlink.h"
32#include "libbfd.h"
33#include "elf-bfd.h"
34#include "elf/ppc64.h"
35#include "elf64-ppc.h"
36#include "dwarf2.h"
37
38static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean);
58
59#define TARGET_LITTLE_SYM powerpc_elf64_le_vec
60#define TARGET_LITTLE_NAME "elf64-powerpcle"
61#define TARGET_BIG_SYM powerpc_elf64_vec
62#define TARGET_BIG_NAME "elf64-powerpc"
63#define ELF_ARCH bfd_arch_powerpc
64#define ELF_TARGET_ID PPC64_ELF_DATA
65#define ELF_MACHINE_CODE EM_PPC64
66#define ELF_MAXPAGESIZE 0x10000
67#define ELF_COMMONPAGESIZE 0x10000
68#define elf_info_to_howto ppc64_elf_info_to_howto
69
70#define elf_backend_want_got_sym 0
71#define elf_backend_want_plt_sym 0
72#define elf_backend_plt_alignment 3
73#define elf_backend_plt_not_loaded 1
74#define elf_backend_got_header_size 8
75#define elf_backend_want_dynrelro 1
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_dtrel_excludes_plt 1
80#define elf_backend_default_execstack 0
81
82#define bfd_elf64_mkobject ppc64_elf_mkobject
83#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
84#define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
85#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
86#define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data
87#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
88#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
89#define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
90#define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
91#define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections
92
93#define elf_backend_object_p ppc64_elf_object_p
94#define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
95#define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
96#define elf_backend_write_core_note ppc64_elf_write_core_note
97#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
98#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
99#define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
100#define elf_backend_check_directives ppc64_elf_before_check_relocs
101#define elf_backend_notice_as_needed ppc64_elf_notice_as_needed
102#define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
103#define elf_backend_check_relocs ppc64_elf_check_relocs
104#define elf_backend_gc_keep ppc64_elf_gc_keep
105#define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
106#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
107#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
108#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
109#define elf_backend_hide_symbol ppc64_elf_hide_symbol
110#define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym
111#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
112#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
113#define elf_backend_hash_symbol ppc64_elf_hash_symbol
114#define elf_backend_init_index_section _bfd_elf_init_2_index_sections
115#define elf_backend_action_discarded ppc64_elf_action_discarded
116#define elf_backend_relocate_section ppc64_elf_relocate_section
117#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
118#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
119#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
120#define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
121#define elf_backend_special_sections ppc64_elf_special_sections
122#define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute
123#define elf_backend_merge_symbol ppc64_elf_merge_symbol
124
125/* The name of the dynamic interpreter. This is put in the .interp
126 section. */
127#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
128
129/* The size in bytes of an entry in the procedure linkage table. */
130#define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8)
131
132/* The initial size of the plt reserved for the dynamic linker. */
133#define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16)
134
135/* Offsets to some stack save slots. */
136#define STK_LR 16
137#define STK_TOC(htab) (htab->opd_abi ? 40 : 24)
138/* This one is dodgy. ELFv2 does not have a linker word, so use the
139 CR save slot. Used only by optimised __tls_get_addr call stub,
140 relying on __tls_get_addr_opt not saving CR.. */
141#define STK_LINKER(htab) (htab->opd_abi ? 32 : 8)
142
143/* TOC base pointers offset from start of TOC. */
144#define TOC_BASE_OFF 0x8000
145/* TOC base alignment. */
146#define TOC_BASE_ALIGN 256
147
148/* Offset of tp and dtp pointers from start of TLS block. */
149#define TP_OFFSET 0x7000
150#define DTP_OFFSET 0x8000
151
152/* .plt call stub instructions. The normal stub is like this, but
153 sometimes the .plt entry crosses a 64k boundary and we need to
154 insert an addi to adjust r11. */
155#define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */
156#define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */
157#define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */
158#define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */
159#define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */
160#define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */
161#define BCTR 0x4e800420 /* bctr */
162
163#define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */
164#define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
165#define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
166
167#define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */
168#define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */
169#define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */
170#define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
171#define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
172#define BNECTR 0x4ca20420 /* bnectr+ */
173#define BNECTR_P4 0x4ce20420 /* bnectr+ */
174
175#define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */
176#define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
177#define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
178
179#define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */
180#define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */
181#define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */
182
183#define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */
184#define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */
185#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
186#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
187#define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */
188
189/* glink call stub instructions. We enter with the index in R0. */
190#define GLINK_CALL_STUB_SIZE (16*4)
191 /* 0: */
192 /* .quad plt0-1f */
193 /* __glink: */
194#define MFLR_R12 0x7d8802a6 /* mflr %12 */
195#define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
196 /* 1: */
197#define MFLR_R11 0x7d6802a6 /* mflr %11 */
198 /* ld %2,(0b-1b)(%11) */
199#define MTLR_R12 0x7d8803a6 /* mtlr %12 */
200#define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */
201 /* ld %12,0(%11) */
202 /* ld %2,8(%11) */
203 /* mtctr %12 */
204 /* ld %11,16(%11) */
205 /* bctr */
206#define MFLR_R0 0x7c0802a6 /* mflr %r0 */
207#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
208#define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */
209#define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */
210#define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */
211
212/* Pad with this. */
213#define NOP 0x60000000
214
215/* Some other nops. */
216#define CROR_151515 0x4def7b82
217#define CROR_313131 0x4ffffb82
218
219/* .glink entries for the first 32k functions are two instructions. */
220#define LI_R0_0 0x38000000 /* li %r0,0 */
221#define B_DOT 0x48000000 /* b . */
222
223/* After that, we need two instructions to load the index, followed by
224 a branch. */
225#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
226#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
227
228/* Instructions used by the save and restore reg functions. */
229#define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
230#define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
231#define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
232#define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
233#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
234#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
235#define LI_R12_0 0x39800000 /* li %r12,0 */
236#define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
237#define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
238#define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
239#define BLR 0x4e800020 /* blr */
240
241/* Since .opd is an array of descriptors and each entry will end up
242 with identical R_PPC64_RELATIVE relocs, there is really no need to
243 propagate .opd relocs; The dynamic linker should be taught to
244 relocate .opd without reloc entries. */
245#ifndef NO_OPD_RELOCS
246#define NO_OPD_RELOCS 0
247#endif
248
249#ifndef ARRAY_SIZE
250#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
251#endif
252
253static inline int
254abiversion (bfd *abfd)
255{
256 return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI;
257}
258
259static inline void
260set_abiversion (bfd *abfd, int ver)
261{
262 elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI;
263 elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI;
264}
265\f
266#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
267
268/* Relocation HOWTO's. */
269static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
270
271static reloc_howto_type ppc64_elf_howto_raw[] = {
272 /* This reloc does nothing. */
273 HOWTO (R_PPC64_NONE, /* type */
274 0, /* rightshift */
275 3, /* size (0 = byte, 1 = short, 2 = long) */
276 0, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_dont, /* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_PPC64_NONE", /* name */
282 FALSE, /* partial_inplace */
283 0, /* src_mask */
284 0, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* A standard 32 bit relocation. */
288 HOWTO (R_PPC64_ADDR32, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 32, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC64_ADDR32", /* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xffffffff, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 26 bit branch; the lower two bits must be zero.
303 FIXME: we don't check that, we just clear them. */
304 HOWTO (R_PPC64_ADDR24, /* type */
305 0, /* rightshift */
306 2, /* size (0 = byte, 1 = short, 2 = long) */
307 26, /* bitsize */
308 FALSE, /* pc_relative */
309 0, /* bitpos */
310 complain_overflow_bitfield, /* complain_on_overflow */
311 bfd_elf_generic_reloc, /* special_function */
312 "R_PPC64_ADDR24", /* name */
313 FALSE, /* partial_inplace */
314 0, /* src_mask */
315 0x03fffffc, /* dst_mask */
316 FALSE), /* pcrel_offset */
317
318 /* A standard 16 bit relocation. */
319 HOWTO (R_PPC64_ADDR16, /* type */
320 0, /* rightshift */
321 1, /* size (0 = byte, 1 = short, 2 = long) */
322 16, /* bitsize */
323 FALSE, /* pc_relative */
324 0, /* bitpos */
325 complain_overflow_bitfield, /* complain_on_overflow */
326 bfd_elf_generic_reloc, /* special_function */
327 "R_PPC64_ADDR16", /* name */
328 FALSE, /* partial_inplace */
329 0, /* src_mask */
330 0xffff, /* dst_mask */
331 FALSE), /* pcrel_offset */
332
333 /* A 16 bit relocation without overflow. */
334 HOWTO (R_PPC64_ADDR16_LO, /* type */
335 0, /* rightshift */
336 1, /* size (0 = byte, 1 = short, 2 = long) */
337 16, /* bitsize */
338 FALSE, /* pc_relative */
339 0, /* bitpos */
340 complain_overflow_dont,/* complain_on_overflow */
341 bfd_elf_generic_reloc, /* special_function */
342 "R_PPC64_ADDR16_LO", /* name */
343 FALSE, /* partial_inplace */
344 0, /* src_mask */
345 0xffff, /* dst_mask */
346 FALSE), /* pcrel_offset */
347
348 /* Bits 16-31 of an address. */
349 HOWTO (R_PPC64_ADDR16_HI, /* type */
350 16, /* rightshift */
351 1, /* size (0 = byte, 1 = short, 2 = long) */
352 16, /* bitsize */
353 FALSE, /* pc_relative */
354 0, /* bitpos */
355 complain_overflow_signed, /* complain_on_overflow */
356 bfd_elf_generic_reloc, /* special_function */
357 "R_PPC64_ADDR16_HI", /* name */
358 FALSE, /* partial_inplace */
359 0, /* src_mask */
360 0xffff, /* dst_mask */
361 FALSE), /* pcrel_offset */
362
363 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
364 bits, treated as a signed number, is negative. */
365 HOWTO (R_PPC64_ADDR16_HA, /* type */
366 16, /* rightshift */
367 1, /* size (0 = byte, 1 = short, 2 = long) */
368 16, /* bitsize */
369 FALSE, /* pc_relative */
370 0, /* bitpos */
371 complain_overflow_signed, /* complain_on_overflow */
372 ppc64_elf_ha_reloc, /* special_function */
373 "R_PPC64_ADDR16_HA", /* name */
374 FALSE, /* partial_inplace */
375 0, /* src_mask */
376 0xffff, /* dst_mask */
377 FALSE), /* pcrel_offset */
378
379 /* An absolute 16 bit branch; the lower two bits must be zero.
380 FIXME: we don't check that, we just clear them. */
381 HOWTO (R_PPC64_ADDR14, /* type */
382 0, /* rightshift */
383 2, /* size (0 = byte, 1 = short, 2 = long) */
384 16, /* bitsize */
385 FALSE, /* pc_relative */
386 0, /* bitpos */
387 complain_overflow_signed, /* complain_on_overflow */
388 ppc64_elf_branch_reloc, /* special_function */
389 "R_PPC64_ADDR14", /* name */
390 FALSE, /* partial_inplace */
391 0, /* src_mask */
392 0x0000fffc, /* dst_mask */
393 FALSE), /* pcrel_offset */
394
395 /* An absolute 16 bit branch, for which bit 10 should be set to
396 indicate that the branch is expected to be taken. The lower two
397 bits must be zero. */
398 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
399 0, /* rightshift */
400 2, /* size (0 = byte, 1 = short, 2 = long) */
401 16, /* bitsize */
402 FALSE, /* pc_relative */
403 0, /* bitpos */
404 complain_overflow_signed, /* complain_on_overflow */
405 ppc64_elf_brtaken_reloc, /* special_function */
406 "R_PPC64_ADDR14_BRTAKEN",/* name */
407 FALSE, /* partial_inplace */
408 0, /* src_mask */
409 0x0000fffc, /* dst_mask */
410 FALSE), /* pcrel_offset */
411
412 /* An absolute 16 bit branch, for which bit 10 should be set to
413 indicate that the branch is not expected to be taken. The lower
414 two bits must be zero. */
415 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
416 0, /* rightshift */
417 2, /* size (0 = byte, 1 = short, 2 = long) */
418 16, /* bitsize */
419 FALSE, /* pc_relative */
420 0, /* bitpos */
421 complain_overflow_signed, /* complain_on_overflow */
422 ppc64_elf_brtaken_reloc, /* special_function */
423 "R_PPC64_ADDR14_BRNTAKEN",/* name */
424 FALSE, /* partial_inplace */
425 0, /* src_mask */
426 0x0000fffc, /* dst_mask */
427 FALSE), /* pcrel_offset */
428
429 /* A relative 26 bit branch; the lower two bits must be zero. */
430 HOWTO (R_PPC64_REL24, /* type */
431 0, /* rightshift */
432 2, /* size (0 = byte, 1 = short, 2 = long) */
433 26, /* bitsize */
434 TRUE, /* pc_relative */
435 0, /* bitpos */
436 complain_overflow_signed, /* complain_on_overflow */
437 ppc64_elf_branch_reloc, /* special_function */
438 "R_PPC64_REL24", /* name */
439 FALSE, /* partial_inplace */
440 0, /* src_mask */
441 0x03fffffc, /* dst_mask */
442 TRUE), /* pcrel_offset */
443
444 /* A relative 16 bit branch; the lower two bits must be zero. */
445 HOWTO (R_PPC64_REL14, /* type */
446 0, /* rightshift */
447 2, /* size (0 = byte, 1 = short, 2 = long) */
448 16, /* bitsize */
449 TRUE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_signed, /* complain_on_overflow */
452 ppc64_elf_branch_reloc, /* special_function */
453 "R_PPC64_REL14", /* name */
454 FALSE, /* partial_inplace */
455 0, /* src_mask */
456 0x0000fffc, /* dst_mask */
457 TRUE), /* pcrel_offset */
458
459 /* A relative 16 bit branch. Bit 10 should be set to indicate that
460 the branch is expected to be taken. The lower two bits must be
461 zero. */
462 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
463 0, /* rightshift */
464 2, /* size (0 = byte, 1 = short, 2 = long) */
465 16, /* bitsize */
466 TRUE, /* pc_relative */
467 0, /* bitpos */
468 complain_overflow_signed, /* complain_on_overflow */
469 ppc64_elf_brtaken_reloc, /* special_function */
470 "R_PPC64_REL14_BRTAKEN", /* name */
471 FALSE, /* partial_inplace */
472 0, /* src_mask */
473 0x0000fffc, /* dst_mask */
474 TRUE), /* pcrel_offset */
475
476 /* A relative 16 bit branch. Bit 10 should be set to indicate that
477 the branch is not expected to be taken. The lower two bits must
478 be zero. */
479 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
480 0, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 16, /* bitsize */
483 TRUE, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_signed, /* complain_on_overflow */
486 ppc64_elf_brtaken_reloc, /* special_function */
487 "R_PPC64_REL14_BRNTAKEN",/* name */
488 FALSE, /* partial_inplace */
489 0, /* src_mask */
490 0x0000fffc, /* dst_mask */
491 TRUE), /* pcrel_offset */
492
493 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
494 symbol. */
495 HOWTO (R_PPC64_GOT16, /* type */
496 0, /* rightshift */
497 1, /* size (0 = byte, 1 = short, 2 = long) */
498 16, /* bitsize */
499 FALSE, /* pc_relative */
500 0, /* bitpos */
501 complain_overflow_signed, /* complain_on_overflow */
502 ppc64_elf_unhandled_reloc, /* special_function */
503 "R_PPC64_GOT16", /* name */
504 FALSE, /* partial_inplace */
505 0, /* src_mask */
506 0xffff, /* dst_mask */
507 FALSE), /* pcrel_offset */
508
509 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
510 the symbol. */
511 HOWTO (R_PPC64_GOT16_LO, /* type */
512 0, /* rightshift */
513 1, /* size (0 = byte, 1 = short, 2 = long) */
514 16, /* bitsize */
515 FALSE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_dont, /* complain_on_overflow */
518 ppc64_elf_unhandled_reloc, /* special_function */
519 "R_PPC64_GOT16_LO", /* name */
520 FALSE, /* partial_inplace */
521 0, /* src_mask */
522 0xffff, /* dst_mask */
523 FALSE), /* pcrel_offset */
524
525 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
526 the symbol. */
527 HOWTO (R_PPC64_GOT16_HI, /* type */
528 16, /* rightshift */
529 1, /* size (0 = byte, 1 = short, 2 = long) */
530 16, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_signed,/* complain_on_overflow */
534 ppc64_elf_unhandled_reloc, /* special_function */
535 "R_PPC64_GOT16_HI", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 0xffff, /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
542 the symbol. */
543 HOWTO (R_PPC64_GOT16_HA, /* type */
544 16, /* rightshift */
545 1, /* size (0 = byte, 1 = short, 2 = long) */
546 16, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_signed,/* complain_on_overflow */
550 ppc64_elf_unhandled_reloc, /* special_function */
551 "R_PPC64_GOT16_HA", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 0xffff, /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* This is used only by the dynamic linker. The symbol should exist
558 both in the object being run and in some shared library. The
559 dynamic linker copies the data addressed by the symbol from the
560 shared library into the object, because the object being
561 run has to have the data at some particular address. */
562 HOWTO (R_PPC64_COPY, /* type */
563 0, /* rightshift */
564 0, /* this one is variable size */
565 0, /* bitsize */
566 FALSE, /* pc_relative */
567 0, /* bitpos */
568 complain_overflow_dont, /* complain_on_overflow */
569 ppc64_elf_unhandled_reloc, /* special_function */
570 "R_PPC64_COPY", /* name */
571 FALSE, /* partial_inplace */
572 0, /* src_mask */
573 0, /* dst_mask */
574 FALSE), /* pcrel_offset */
575
576 /* Like R_PPC64_ADDR64, but used when setting global offset table
577 entries. */
578 HOWTO (R_PPC64_GLOB_DAT, /* type */
579 0, /* rightshift */
580 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
581 64, /* bitsize */
582 FALSE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_dont, /* complain_on_overflow */
585 ppc64_elf_unhandled_reloc, /* special_function */
586 "R_PPC64_GLOB_DAT", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 ONES (64), /* dst_mask */
590 FALSE), /* pcrel_offset */
591
592 /* Created by the link editor. Marks a procedure linkage table
593 entry for a symbol. */
594 HOWTO (R_PPC64_JMP_SLOT, /* type */
595 0, /* rightshift */
596 0, /* size (0 = byte, 1 = short, 2 = long) */
597 0, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_dont, /* complain_on_overflow */
601 ppc64_elf_unhandled_reloc, /* special_function */
602 "R_PPC64_JMP_SLOT", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* Used only by the dynamic linker. When the object is run, this
609 doubleword64 is set to the load address of the object, plus the
610 addend. */
611 HOWTO (R_PPC64_RELATIVE, /* type */
612 0, /* rightshift */
613 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
614 64, /* bitsize */
615 FALSE, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_dont, /* complain_on_overflow */
618 bfd_elf_generic_reloc, /* special_function */
619 "R_PPC64_RELATIVE", /* name */
620 FALSE, /* partial_inplace */
621 0, /* src_mask */
622 ONES (64), /* dst_mask */
623 FALSE), /* pcrel_offset */
624
625 /* Like R_PPC64_ADDR32, but may be unaligned. */
626 HOWTO (R_PPC64_UADDR32, /* type */
627 0, /* rightshift */
628 2, /* size (0 = byte, 1 = short, 2 = long) */
629 32, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_bitfield, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC64_UADDR32", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffffffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC64_ADDR16, but may be unaligned. */
641 HOWTO (R_PPC64_UADDR16, /* type */
642 0, /* rightshift */
643 1, /* size (0 = byte, 1 = short, 2 = long) */
644 16, /* bitsize */
645 FALSE, /* pc_relative */
646 0, /* bitpos */
647 complain_overflow_bitfield, /* complain_on_overflow */
648 bfd_elf_generic_reloc, /* special_function */
649 "R_PPC64_UADDR16", /* name */
650 FALSE, /* partial_inplace */
651 0, /* src_mask */
652 0xffff, /* dst_mask */
653 FALSE), /* pcrel_offset */
654
655 /* 32-bit PC relative. */
656 HOWTO (R_PPC64_REL32, /* type */
657 0, /* rightshift */
658 2, /* size (0 = byte, 1 = short, 2 = long) */
659 32, /* bitsize */
660 TRUE, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_signed, /* complain_on_overflow */
663 bfd_elf_generic_reloc, /* special_function */
664 "R_PPC64_REL32", /* name */
665 FALSE, /* partial_inplace */
666 0, /* src_mask */
667 0xffffffff, /* dst_mask */
668 TRUE), /* pcrel_offset */
669
670 /* 32-bit relocation to the symbol's procedure linkage table. */
671 HOWTO (R_PPC64_PLT32, /* type */
672 0, /* rightshift */
673 2, /* size (0 = byte, 1 = short, 2 = long) */
674 32, /* bitsize */
675 FALSE, /* pc_relative */
676 0, /* bitpos */
677 complain_overflow_bitfield, /* complain_on_overflow */
678 ppc64_elf_unhandled_reloc, /* special_function */
679 "R_PPC64_PLT32", /* name */
680 FALSE, /* partial_inplace */
681 0, /* src_mask */
682 0xffffffff, /* dst_mask */
683 FALSE), /* pcrel_offset */
684
685 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
686 FIXME: R_PPC64_PLTREL32 not supported. */
687 HOWTO (R_PPC64_PLTREL32, /* type */
688 0, /* rightshift */
689 2, /* size (0 = byte, 1 = short, 2 = long) */
690 32, /* bitsize */
691 TRUE, /* pc_relative */
692 0, /* bitpos */
693 complain_overflow_signed, /* complain_on_overflow */
694 ppc64_elf_unhandled_reloc, /* special_function */
695 "R_PPC64_PLTREL32", /* name */
696 FALSE, /* partial_inplace */
697 0, /* src_mask */
698 0xffffffff, /* dst_mask */
699 TRUE), /* pcrel_offset */
700
701 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
702 the symbol. */
703 HOWTO (R_PPC64_PLT16_LO, /* type */
704 0, /* rightshift */
705 1, /* size (0 = byte, 1 = short, 2 = long) */
706 16, /* bitsize */
707 FALSE, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_dont, /* complain_on_overflow */
710 ppc64_elf_unhandled_reloc, /* special_function */
711 "R_PPC64_PLT16_LO", /* name */
712 FALSE, /* partial_inplace */
713 0, /* src_mask */
714 0xffff, /* dst_mask */
715 FALSE), /* pcrel_offset */
716
717 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
718 the symbol. */
719 HOWTO (R_PPC64_PLT16_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_signed, /* complain_on_overflow */
726 ppc64_elf_unhandled_reloc, /* special_function */
727 "R_PPC64_PLT16_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
734 the symbol. */
735 HOWTO (R_PPC64_PLT16_HA, /* type */
736 16, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 FALSE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_signed, /* complain_on_overflow */
742 ppc64_elf_unhandled_reloc, /* special_function */
743 "R_PPC64_PLT16_HA", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 FALSE), /* pcrel_offset */
748
749 /* 16-bit section relative relocation. */
750 HOWTO (R_PPC64_SECTOFF, /* type */
751 0, /* rightshift */
752 1, /* size (0 = byte, 1 = short, 2 = long) */
753 16, /* bitsize */
754 FALSE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_signed, /* complain_on_overflow */
757 ppc64_elf_sectoff_reloc, /* special_function */
758 "R_PPC64_SECTOFF", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 0xffff, /* dst_mask */
762 FALSE), /* pcrel_offset */
763
764 /* Like R_PPC64_SECTOFF, but no overflow warning. */
765 HOWTO (R_PPC64_SECTOFF_LO, /* type */
766 0, /* rightshift */
767 1, /* size (0 = byte, 1 = short, 2 = long) */
768 16, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 ppc64_elf_sectoff_reloc, /* special_function */
773 "R_PPC64_SECTOFF_LO", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* 16-bit upper half section relative relocation. */
780 HOWTO (R_PPC64_SECTOFF_HI, /* type */
781 16, /* rightshift */
782 1, /* size (0 = byte, 1 = short, 2 = long) */
783 16, /* bitsize */
784 FALSE, /* pc_relative */
785 0, /* bitpos */
786 complain_overflow_signed, /* complain_on_overflow */
787 ppc64_elf_sectoff_reloc, /* special_function */
788 "R_PPC64_SECTOFF_HI", /* name */
789 FALSE, /* partial_inplace */
790 0, /* src_mask */
791 0xffff, /* dst_mask */
792 FALSE), /* pcrel_offset */
793
794 /* 16-bit upper half adjusted section relative relocation. */
795 HOWTO (R_PPC64_SECTOFF_HA, /* type */
796 16, /* rightshift */
797 1, /* size (0 = byte, 1 = short, 2 = long) */
798 16, /* bitsize */
799 FALSE, /* pc_relative */
800 0, /* bitpos */
801 complain_overflow_signed, /* complain_on_overflow */
802 ppc64_elf_sectoff_ha_reloc, /* special_function */
803 "R_PPC64_SECTOFF_HA", /* name */
804 FALSE, /* partial_inplace */
805 0, /* src_mask */
806 0xffff, /* dst_mask */
807 FALSE), /* pcrel_offset */
808
809 /* Like R_PPC64_REL24 without touching the two least significant bits. */
810 HOWTO (R_PPC64_REL30, /* type */
811 2, /* rightshift */
812 2, /* size (0 = byte, 1 = short, 2 = long) */
813 30, /* bitsize */
814 TRUE, /* pc_relative */
815 0, /* bitpos */
816 complain_overflow_dont, /* complain_on_overflow */
817 bfd_elf_generic_reloc, /* special_function */
818 "R_PPC64_REL30", /* name */
819 FALSE, /* partial_inplace */
820 0, /* src_mask */
821 0xfffffffc, /* dst_mask */
822 TRUE), /* pcrel_offset */
823
824 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
825
826 /* A standard 64-bit relocation. */
827 HOWTO (R_PPC64_ADDR64, /* type */
828 0, /* rightshift */
829 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
830 64, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 bfd_elf_generic_reloc, /* special_function */
835 "R_PPC64_ADDR64", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 ONES (64), /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* The bits 32-47 of an address. */
842 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
843 32, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 bfd_elf_generic_reloc, /* special_function */
850 "R_PPC64_ADDR16_HIGHER", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* The bits 32-47 of an address, plus 1 if the contents of the low
857 16 bits, treated as a signed number, is negative. */
858 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
859 32, /* rightshift */
860 1, /* size (0 = byte, 1 = short, 2 = long) */
861 16, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc64_elf_ha_reloc, /* special_function */
866 "R_PPC64_ADDR16_HIGHERA", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* The bits 48-63 of an address. */
873 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
874 48, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_dont, /* complain_on_overflow */
880 bfd_elf_generic_reloc, /* special_function */
881 "R_PPC64_ADDR16_HIGHEST", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* The bits 48-63 of an address, plus 1 if the contents of the low
888 16 bits, treated as a signed number, is negative. */
889 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
890 48, /* rightshift */
891 1, /* size (0 = byte, 1 = short, 2 = long) */
892 16, /* bitsize */
893 FALSE, /* pc_relative */
894 0, /* bitpos */
895 complain_overflow_dont, /* complain_on_overflow */
896 ppc64_elf_ha_reloc, /* special_function */
897 "R_PPC64_ADDR16_HIGHESTA", /* name */
898 FALSE, /* partial_inplace */
899 0, /* src_mask */
900 0xffff, /* dst_mask */
901 FALSE), /* pcrel_offset */
902
903 /* Like ADDR64, but may be unaligned. */
904 HOWTO (R_PPC64_UADDR64, /* type */
905 0, /* rightshift */
906 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
907 64, /* bitsize */
908 FALSE, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_dont, /* complain_on_overflow */
911 bfd_elf_generic_reloc, /* special_function */
912 "R_PPC64_UADDR64", /* name */
913 FALSE, /* partial_inplace */
914 0, /* src_mask */
915 ONES (64), /* dst_mask */
916 FALSE), /* pcrel_offset */
917
918 /* 64-bit relative relocation. */
919 HOWTO (R_PPC64_REL64, /* type */
920 0, /* rightshift */
921 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
922 64, /* bitsize */
923 TRUE, /* pc_relative */
924 0, /* bitpos */
925 complain_overflow_dont, /* complain_on_overflow */
926 bfd_elf_generic_reloc, /* special_function */
927 "R_PPC64_REL64", /* name */
928 FALSE, /* partial_inplace */
929 0, /* src_mask */
930 ONES (64), /* dst_mask */
931 TRUE), /* pcrel_offset */
932
933 /* 64-bit relocation to the symbol's procedure linkage table. */
934 HOWTO (R_PPC64_PLT64, /* type */
935 0, /* rightshift */
936 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
937 64, /* bitsize */
938 FALSE, /* pc_relative */
939 0, /* bitpos */
940 complain_overflow_dont, /* complain_on_overflow */
941 ppc64_elf_unhandled_reloc, /* special_function */
942 "R_PPC64_PLT64", /* name */
943 FALSE, /* partial_inplace */
944 0, /* src_mask */
945 ONES (64), /* dst_mask */
946 FALSE), /* pcrel_offset */
947
948 /* 64-bit PC relative relocation to the symbol's procedure linkage
949 table. */
950 /* FIXME: R_PPC64_PLTREL64 not supported. */
951 HOWTO (R_PPC64_PLTREL64, /* type */
952 0, /* rightshift */
953 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
954 64, /* bitsize */
955 TRUE, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_dont, /* complain_on_overflow */
958 ppc64_elf_unhandled_reloc, /* special_function */
959 "R_PPC64_PLTREL64", /* name */
960 FALSE, /* partial_inplace */
961 0, /* src_mask */
962 ONES (64), /* dst_mask */
963 TRUE), /* pcrel_offset */
964
965 /* 16 bit TOC-relative relocation. */
966
967 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
968 HOWTO (R_PPC64_TOC16, /* type */
969 0, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_signed, /* complain_on_overflow */
975 ppc64_elf_toc_reloc, /* special_function */
976 "R_PPC64_TOC16", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 16 bit TOC-relative relocation without overflow. */
983
984 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
985 HOWTO (R_PPC64_TOC16_LO, /* type */
986 0, /* rightshift */
987 1, /* size (0 = byte, 1 = short, 2 = long) */
988 16, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_dont, /* complain_on_overflow */
992 ppc64_elf_toc_reloc, /* special_function */
993 "R_PPC64_TOC16_LO", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 0xffff, /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* 16 bit TOC-relative relocation, high 16 bits. */
1000
1001 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
1002 HOWTO (R_PPC64_TOC16_HI, /* type */
1003 16, /* rightshift */
1004 1, /* size (0 = byte, 1 = short, 2 = long) */
1005 16, /* bitsize */
1006 FALSE, /* pc_relative */
1007 0, /* bitpos */
1008 complain_overflow_signed, /* complain_on_overflow */
1009 ppc64_elf_toc_reloc, /* special_function */
1010 "R_PPC64_TOC16_HI", /* name */
1011 FALSE, /* partial_inplace */
1012 0, /* src_mask */
1013 0xffff, /* dst_mask */
1014 FALSE), /* pcrel_offset */
1015
1016 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
1017 contents of the low 16 bits, treated as a signed number, is
1018 negative. */
1019
1020 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
1021 HOWTO (R_PPC64_TOC16_HA, /* type */
1022 16, /* rightshift */
1023 1, /* size (0 = byte, 1 = short, 2 = long) */
1024 16, /* bitsize */
1025 FALSE, /* pc_relative */
1026 0, /* bitpos */
1027 complain_overflow_signed, /* complain_on_overflow */
1028 ppc64_elf_toc_ha_reloc, /* special_function */
1029 "R_PPC64_TOC16_HA", /* name */
1030 FALSE, /* partial_inplace */
1031 0, /* src_mask */
1032 0xffff, /* dst_mask */
1033 FALSE), /* pcrel_offset */
1034
1035 /* 64-bit relocation; insert value of TOC base (.TOC.). */
1036
1037 /* R_PPC64_TOC 51 doubleword64 .TOC. */
1038 HOWTO (R_PPC64_TOC, /* type */
1039 0, /* rightshift */
1040 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1041 64, /* bitsize */
1042 FALSE, /* pc_relative */
1043 0, /* bitpos */
1044 complain_overflow_dont, /* complain_on_overflow */
1045 ppc64_elf_toc64_reloc, /* special_function */
1046 "R_PPC64_TOC", /* name */
1047 FALSE, /* partial_inplace */
1048 0, /* src_mask */
1049 ONES (64), /* dst_mask */
1050 FALSE), /* pcrel_offset */
1051
1052 /* Like R_PPC64_GOT16, but also informs the link editor that the
1053 value to relocate may (!) refer to a PLT entry which the link
1054 editor (a) may replace with the symbol value. If the link editor
1055 is unable to fully resolve the symbol, it may (b) create a PLT
1056 entry and store the address to the new PLT entry in the GOT.
1057 This permits lazy resolution of function symbols at run time.
1058 The link editor may also skip all of this and just (c) emit a
1059 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1060 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1061 HOWTO (R_PPC64_PLTGOT16, /* type */
1062 0, /* rightshift */
1063 1, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_signed, /* complain_on_overflow */
1068 ppc64_elf_unhandled_reloc, /* special_function */
1069 "R_PPC64_PLTGOT16", /* name */
1070 FALSE, /* partial_inplace */
1071 0, /* src_mask */
1072 0xffff, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* Like R_PPC64_PLTGOT16, but without overflow. */
1076 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1077 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1078 0, /* rightshift */
1079 1, /* size (0 = byte, 1 = short, 2 = long) */
1080 16, /* bitsize */
1081 FALSE, /* pc_relative */
1082 0, /* bitpos */
1083 complain_overflow_dont, /* complain_on_overflow */
1084 ppc64_elf_unhandled_reloc, /* special_function */
1085 "R_PPC64_PLTGOT16_LO", /* name */
1086 FALSE, /* partial_inplace */
1087 0, /* src_mask */
1088 0xffff, /* dst_mask */
1089 FALSE), /* pcrel_offset */
1090
1091 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1092 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1093 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1094 16, /* rightshift */
1095 1, /* size (0 = byte, 1 = short, 2 = long) */
1096 16, /* bitsize */
1097 FALSE, /* pc_relative */
1098 0, /* bitpos */
1099 complain_overflow_signed, /* complain_on_overflow */
1100 ppc64_elf_unhandled_reloc, /* special_function */
1101 "R_PPC64_PLTGOT16_HI", /* name */
1102 FALSE, /* partial_inplace */
1103 0, /* src_mask */
1104 0xffff, /* dst_mask */
1105 FALSE), /* pcrel_offset */
1106
1107 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1108 1 if the contents of the low 16 bits, treated as a signed number,
1109 is negative. */
1110 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1111 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1112 16, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc64_elf_unhandled_reloc, /* special_function */
1119 "R_PPC64_PLTGOT16_HA", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1126 HOWTO (R_PPC64_ADDR16_DS, /* type */
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_signed, /* complain_on_overflow */
1133 bfd_elf_generic_reloc, /* special_function */
1134 "R_PPC64_ADDR16_DS", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xfffc, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1141 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1142 0, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont,/* complain_on_overflow */
1148 bfd_elf_generic_reloc, /* special_function */
1149 "R_PPC64_ADDR16_LO_DS",/* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xfffc, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1156 HOWTO (R_PPC64_GOT16_DS, /* type */
1157 0, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_signed, /* complain_on_overflow */
1163 ppc64_elf_unhandled_reloc, /* special_function */
1164 "R_PPC64_GOT16_DS", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xfffc, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1171 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1172 0, /* rightshift */
1173 1, /* size (0 = byte, 1 = short, 2 = long) */
1174 16, /* bitsize */
1175 FALSE, /* pc_relative */
1176 0, /* bitpos */
1177 complain_overflow_dont, /* complain_on_overflow */
1178 ppc64_elf_unhandled_reloc, /* special_function */
1179 "R_PPC64_GOT16_LO_DS", /* name */
1180 FALSE, /* partial_inplace */
1181 0, /* src_mask */
1182 0xfffc, /* dst_mask */
1183 FALSE), /* pcrel_offset */
1184
1185 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1186 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1187 0, /* rightshift */
1188 1, /* size (0 = byte, 1 = short, 2 = long) */
1189 16, /* bitsize */
1190 FALSE, /* pc_relative */
1191 0, /* bitpos */
1192 complain_overflow_dont, /* complain_on_overflow */
1193 ppc64_elf_unhandled_reloc, /* special_function */
1194 "R_PPC64_PLT16_LO_DS", /* name */
1195 FALSE, /* partial_inplace */
1196 0, /* src_mask */
1197 0xfffc, /* dst_mask */
1198 FALSE), /* pcrel_offset */
1199
1200 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1201 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1202 0, /* rightshift */
1203 1, /* size (0 = byte, 1 = short, 2 = long) */
1204 16, /* bitsize */
1205 FALSE, /* pc_relative */
1206 0, /* bitpos */
1207 complain_overflow_signed, /* complain_on_overflow */
1208 ppc64_elf_sectoff_reloc, /* special_function */
1209 "R_PPC64_SECTOFF_DS", /* name */
1210 FALSE, /* partial_inplace */
1211 0, /* src_mask */
1212 0xfffc, /* dst_mask */
1213 FALSE), /* pcrel_offset */
1214
1215 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1216 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1217 0, /* rightshift */
1218 1, /* size (0 = byte, 1 = short, 2 = long) */
1219 16, /* bitsize */
1220 FALSE, /* pc_relative */
1221 0, /* bitpos */
1222 complain_overflow_dont, /* complain_on_overflow */
1223 ppc64_elf_sectoff_reloc, /* special_function */
1224 "R_PPC64_SECTOFF_LO_DS",/* name */
1225 FALSE, /* partial_inplace */
1226 0, /* src_mask */
1227 0xfffc, /* dst_mask */
1228 FALSE), /* pcrel_offset */
1229
1230 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1231 HOWTO (R_PPC64_TOC16_DS, /* type */
1232 0, /* rightshift */
1233 1, /* size (0 = byte, 1 = short, 2 = long) */
1234 16, /* bitsize */
1235 FALSE, /* pc_relative */
1236 0, /* bitpos */
1237 complain_overflow_signed, /* complain_on_overflow */
1238 ppc64_elf_toc_reloc, /* special_function */
1239 "R_PPC64_TOC16_DS", /* name */
1240 FALSE, /* partial_inplace */
1241 0, /* src_mask */
1242 0xfffc, /* dst_mask */
1243 FALSE), /* pcrel_offset */
1244
1245 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1246 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1247 0, /* rightshift */
1248 1, /* size (0 = byte, 1 = short, 2 = long) */
1249 16, /* bitsize */
1250 FALSE, /* pc_relative */
1251 0, /* bitpos */
1252 complain_overflow_dont, /* complain_on_overflow */
1253 ppc64_elf_toc_reloc, /* special_function */
1254 "R_PPC64_TOC16_LO_DS", /* name */
1255 FALSE, /* partial_inplace */
1256 0, /* src_mask */
1257 0xfffc, /* dst_mask */
1258 FALSE), /* pcrel_offset */
1259
1260 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1261 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1262 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1263 0, /* rightshift */
1264 1, /* size (0 = byte, 1 = short, 2 = long) */
1265 16, /* bitsize */
1266 FALSE, /* pc_relative */
1267 0, /* bitpos */
1268 complain_overflow_signed, /* complain_on_overflow */
1269 ppc64_elf_unhandled_reloc, /* special_function */
1270 "R_PPC64_PLTGOT16_DS", /* name */
1271 FALSE, /* partial_inplace */
1272 0, /* src_mask */
1273 0xfffc, /* dst_mask */
1274 FALSE), /* pcrel_offset */
1275
1276 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1277 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1278 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_dont, /* complain_on_overflow */
1285 ppc64_elf_unhandled_reloc, /* special_function */
1286 "R_PPC64_PLTGOT16_LO_DS",/* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xfffc, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* Marker relocs for TLS. */
1293 HOWTO (R_PPC64_TLS,
1294 0, /* rightshift */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 32, /* bitsize */
1297 FALSE, /* pc_relative */
1298 0, /* bitpos */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TLS", /* name */
1302 FALSE, /* partial_inplace */
1303 0, /* src_mask */
1304 0, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1306
1307 HOWTO (R_PPC64_TLSGD,
1308 0, /* rightshift */
1309 2, /* size (0 = byte, 1 = short, 2 = long) */
1310 32, /* bitsize */
1311 FALSE, /* pc_relative */
1312 0, /* bitpos */
1313 complain_overflow_dont, /* complain_on_overflow */
1314 bfd_elf_generic_reloc, /* special_function */
1315 "R_PPC64_TLSGD", /* name */
1316 FALSE, /* partial_inplace */
1317 0, /* src_mask */
1318 0, /* dst_mask */
1319 FALSE), /* pcrel_offset */
1320
1321 HOWTO (R_PPC64_TLSLD,
1322 0, /* rightshift */
1323 2, /* size (0 = byte, 1 = short, 2 = long) */
1324 32, /* bitsize */
1325 FALSE, /* pc_relative */
1326 0, /* bitpos */
1327 complain_overflow_dont, /* complain_on_overflow */
1328 bfd_elf_generic_reloc, /* special_function */
1329 "R_PPC64_TLSLD", /* name */
1330 FALSE, /* partial_inplace */
1331 0, /* src_mask */
1332 0, /* dst_mask */
1333 FALSE), /* pcrel_offset */
1334
1335 HOWTO (R_PPC64_TOCSAVE,
1336 0, /* rightshift */
1337 2, /* size (0 = byte, 1 = short, 2 = long) */
1338 32, /* bitsize */
1339 FALSE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_dont, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC64_TOCSAVE", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* Computes the load module index of the load module that contains the
1350 definition of its TLS sym. */
1351 HOWTO (R_PPC64_DTPMOD64,
1352 0, /* rightshift */
1353 4, /* size (0 = byte, 1 = short, 2 = long) */
1354 64, /* bitsize */
1355 FALSE, /* pc_relative */
1356 0, /* bitpos */
1357 complain_overflow_dont, /* complain_on_overflow */
1358 ppc64_elf_unhandled_reloc, /* special_function */
1359 "R_PPC64_DTPMOD64", /* name */
1360 FALSE, /* partial_inplace */
1361 0, /* src_mask */
1362 ONES (64), /* dst_mask */
1363 FALSE), /* pcrel_offset */
1364
1365 /* Computes a dtv-relative displacement, the difference between the value
1366 of sym+add and the base address of the thread-local storage block that
1367 contains the definition of sym, minus 0x8000. */
1368 HOWTO (R_PPC64_DTPREL64,
1369 0, /* rightshift */
1370 4, /* size (0 = byte, 1 = short, 2 = long) */
1371 64, /* bitsize */
1372 FALSE, /* pc_relative */
1373 0, /* bitpos */
1374 complain_overflow_dont, /* complain_on_overflow */
1375 ppc64_elf_unhandled_reloc, /* special_function */
1376 "R_PPC64_DTPREL64", /* name */
1377 FALSE, /* partial_inplace */
1378 0, /* src_mask */
1379 ONES (64), /* dst_mask */
1380 FALSE), /* pcrel_offset */
1381
1382 /* A 16 bit dtprel reloc. */
1383 HOWTO (R_PPC64_DTPREL16,
1384 0, /* rightshift */
1385 1, /* size (0 = byte, 1 = short, 2 = long) */
1386 16, /* bitsize */
1387 FALSE, /* pc_relative */
1388 0, /* bitpos */
1389 complain_overflow_signed, /* complain_on_overflow */
1390 ppc64_elf_unhandled_reloc, /* special_function */
1391 "R_PPC64_DTPREL16", /* name */
1392 FALSE, /* partial_inplace */
1393 0, /* src_mask */
1394 0xffff, /* dst_mask */
1395 FALSE), /* pcrel_offset */
1396
1397 /* Like DTPREL16, but no overflow. */
1398 HOWTO (R_PPC64_DTPREL16_LO,
1399 0, /* rightshift */
1400 1, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 FALSE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_dont, /* complain_on_overflow */
1405 ppc64_elf_unhandled_reloc, /* special_function */
1406 "R_PPC64_DTPREL16_LO", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 FALSE), /* pcrel_offset */
1411
1412 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1413 HOWTO (R_PPC64_DTPREL16_HI,
1414 16, /* rightshift */
1415 1, /* size (0 = byte, 1 = short, 2 = long) */
1416 16, /* bitsize */
1417 FALSE, /* pc_relative */
1418 0, /* bitpos */
1419 complain_overflow_signed, /* complain_on_overflow */
1420 ppc64_elf_unhandled_reloc, /* special_function */
1421 "R_PPC64_DTPREL16_HI", /* name */
1422 FALSE, /* partial_inplace */
1423 0, /* src_mask */
1424 0xffff, /* dst_mask */
1425 FALSE), /* pcrel_offset */
1426
1427 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1428 HOWTO (R_PPC64_DTPREL16_HA,
1429 16, /* rightshift */
1430 1, /* size (0 = byte, 1 = short, 2 = long) */
1431 16, /* bitsize */
1432 FALSE, /* pc_relative */
1433 0, /* bitpos */
1434 complain_overflow_signed, /* complain_on_overflow */
1435 ppc64_elf_unhandled_reloc, /* special_function */
1436 "R_PPC64_DTPREL16_HA", /* name */
1437 FALSE, /* partial_inplace */
1438 0, /* src_mask */
1439 0xffff, /* dst_mask */
1440 FALSE), /* pcrel_offset */
1441
1442 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1443 HOWTO (R_PPC64_DTPREL16_HIGHER,
1444 32, /* rightshift */
1445 1, /* size (0 = byte, 1 = short, 2 = long) */
1446 16, /* bitsize */
1447 FALSE, /* pc_relative */
1448 0, /* bitpos */
1449 complain_overflow_dont, /* complain_on_overflow */
1450 ppc64_elf_unhandled_reloc, /* special_function */
1451 "R_PPC64_DTPREL16_HIGHER", /* name */
1452 FALSE, /* partial_inplace */
1453 0, /* src_mask */
1454 0xffff, /* dst_mask */
1455 FALSE), /* pcrel_offset */
1456
1457 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1458 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1459 32, /* rightshift */
1460 1, /* size (0 = byte, 1 = short, 2 = long) */
1461 16, /* bitsize */
1462 FALSE, /* pc_relative */
1463 0, /* bitpos */
1464 complain_overflow_dont, /* complain_on_overflow */
1465 ppc64_elf_unhandled_reloc, /* special_function */
1466 "R_PPC64_DTPREL16_HIGHERA", /* name */
1467 FALSE, /* partial_inplace */
1468 0, /* src_mask */
1469 0xffff, /* dst_mask */
1470 FALSE), /* pcrel_offset */
1471
1472 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1473 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1474 48, /* rightshift */
1475 1, /* size (0 = byte, 1 = short, 2 = long) */
1476 16, /* bitsize */
1477 FALSE, /* pc_relative */
1478 0, /* bitpos */
1479 complain_overflow_dont, /* complain_on_overflow */
1480 ppc64_elf_unhandled_reloc, /* special_function */
1481 "R_PPC64_DTPREL16_HIGHEST", /* name */
1482 FALSE, /* partial_inplace */
1483 0, /* src_mask */
1484 0xffff, /* dst_mask */
1485 FALSE), /* pcrel_offset */
1486
1487 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1488 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1489 48, /* rightshift */
1490 1, /* size (0 = byte, 1 = short, 2 = long) */
1491 16, /* bitsize */
1492 FALSE, /* pc_relative */
1493 0, /* bitpos */
1494 complain_overflow_dont, /* complain_on_overflow */
1495 ppc64_elf_unhandled_reloc, /* special_function */
1496 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1497 FALSE, /* partial_inplace */
1498 0, /* src_mask */
1499 0xffff, /* dst_mask */
1500 FALSE), /* pcrel_offset */
1501
1502 /* Like DTPREL16, but for insns with a DS field. */
1503 HOWTO (R_PPC64_DTPREL16_DS,
1504 0, /* rightshift */
1505 1, /* size (0 = byte, 1 = short, 2 = long) */
1506 16, /* bitsize */
1507 FALSE, /* pc_relative */
1508 0, /* bitpos */
1509 complain_overflow_signed, /* complain_on_overflow */
1510 ppc64_elf_unhandled_reloc, /* special_function */
1511 "R_PPC64_DTPREL16_DS", /* name */
1512 FALSE, /* partial_inplace */
1513 0, /* src_mask */
1514 0xfffc, /* dst_mask */
1515 FALSE), /* pcrel_offset */
1516
1517 /* Like DTPREL16_DS, but no overflow. */
1518 HOWTO (R_PPC64_DTPREL16_LO_DS,
1519 0, /* rightshift */
1520 1, /* size (0 = byte, 1 = short, 2 = long) */
1521 16, /* bitsize */
1522 FALSE, /* pc_relative */
1523 0, /* bitpos */
1524 complain_overflow_dont, /* complain_on_overflow */
1525 ppc64_elf_unhandled_reloc, /* special_function */
1526 "R_PPC64_DTPREL16_LO_DS", /* name */
1527 FALSE, /* partial_inplace */
1528 0, /* src_mask */
1529 0xfffc, /* dst_mask */
1530 FALSE), /* pcrel_offset */
1531
1532 /* Computes a tp-relative displacement, the difference between the value of
1533 sym+add and the value of the thread pointer (r13). */
1534 HOWTO (R_PPC64_TPREL64,
1535 0, /* rightshift */
1536 4, /* size (0 = byte, 1 = short, 2 = long) */
1537 64, /* bitsize */
1538 FALSE, /* pc_relative */
1539 0, /* bitpos */
1540 complain_overflow_dont, /* complain_on_overflow */
1541 ppc64_elf_unhandled_reloc, /* special_function */
1542 "R_PPC64_TPREL64", /* name */
1543 FALSE, /* partial_inplace */
1544 0, /* src_mask */
1545 ONES (64), /* dst_mask */
1546 FALSE), /* pcrel_offset */
1547
1548 /* A 16 bit tprel reloc. */
1549 HOWTO (R_PPC64_TPREL16,
1550 0, /* rightshift */
1551 1, /* size (0 = byte, 1 = short, 2 = long) */
1552 16, /* bitsize */
1553 FALSE, /* pc_relative */
1554 0, /* bitpos */
1555 complain_overflow_signed, /* complain_on_overflow */
1556 ppc64_elf_unhandled_reloc, /* special_function */
1557 "R_PPC64_TPREL16", /* name */
1558 FALSE, /* partial_inplace */
1559 0, /* src_mask */
1560 0xffff, /* dst_mask */
1561 FALSE), /* pcrel_offset */
1562
1563 /* Like TPREL16, but no overflow. */
1564 HOWTO (R_PPC64_TPREL16_LO,
1565 0, /* rightshift */
1566 1, /* size (0 = byte, 1 = short, 2 = long) */
1567 16, /* bitsize */
1568 FALSE, /* pc_relative */
1569 0, /* bitpos */
1570 complain_overflow_dont, /* complain_on_overflow */
1571 ppc64_elf_unhandled_reloc, /* special_function */
1572 "R_PPC64_TPREL16_LO", /* name */
1573 FALSE, /* partial_inplace */
1574 0, /* src_mask */
1575 0xffff, /* dst_mask */
1576 FALSE), /* pcrel_offset */
1577
1578 /* Like TPREL16_LO, but next higher group of 16 bits. */
1579 HOWTO (R_PPC64_TPREL16_HI,
1580 16, /* rightshift */
1581 1, /* size (0 = byte, 1 = short, 2 = long) */
1582 16, /* bitsize */
1583 FALSE, /* pc_relative */
1584 0, /* bitpos */
1585 complain_overflow_signed, /* complain_on_overflow */
1586 ppc64_elf_unhandled_reloc, /* special_function */
1587 "R_PPC64_TPREL16_HI", /* name */
1588 FALSE, /* partial_inplace */
1589 0, /* src_mask */
1590 0xffff, /* dst_mask */
1591 FALSE), /* pcrel_offset */
1592
1593 /* Like TPREL16_HI, but adjust for low 16 bits. */
1594 HOWTO (R_PPC64_TPREL16_HA,
1595 16, /* rightshift */
1596 1, /* size (0 = byte, 1 = short, 2 = long) */
1597 16, /* bitsize */
1598 FALSE, /* pc_relative */
1599 0, /* bitpos */
1600 complain_overflow_signed, /* complain_on_overflow */
1601 ppc64_elf_unhandled_reloc, /* special_function */
1602 "R_PPC64_TPREL16_HA", /* name */
1603 FALSE, /* partial_inplace */
1604 0, /* src_mask */
1605 0xffff, /* dst_mask */
1606 FALSE), /* pcrel_offset */
1607
1608 /* Like TPREL16_HI, but next higher group of 16 bits. */
1609 HOWTO (R_PPC64_TPREL16_HIGHER,
1610 32, /* rightshift */
1611 1, /* size (0 = byte, 1 = short, 2 = long) */
1612 16, /* bitsize */
1613 FALSE, /* pc_relative */
1614 0, /* bitpos */
1615 complain_overflow_dont, /* complain_on_overflow */
1616 ppc64_elf_unhandled_reloc, /* special_function */
1617 "R_PPC64_TPREL16_HIGHER", /* name */
1618 FALSE, /* partial_inplace */
1619 0, /* src_mask */
1620 0xffff, /* dst_mask */
1621 FALSE), /* pcrel_offset */
1622
1623 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1624 HOWTO (R_PPC64_TPREL16_HIGHERA,
1625 32, /* rightshift */
1626 1, /* size (0 = byte, 1 = short, 2 = long) */
1627 16, /* bitsize */
1628 FALSE, /* pc_relative */
1629 0, /* bitpos */
1630 complain_overflow_dont, /* complain_on_overflow */
1631 ppc64_elf_unhandled_reloc, /* special_function */
1632 "R_PPC64_TPREL16_HIGHERA", /* name */
1633 FALSE, /* partial_inplace */
1634 0, /* src_mask */
1635 0xffff, /* dst_mask */
1636 FALSE), /* pcrel_offset */
1637
1638 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1639 HOWTO (R_PPC64_TPREL16_HIGHEST,
1640 48, /* rightshift */
1641 1, /* size (0 = byte, 1 = short, 2 = long) */
1642 16, /* bitsize */
1643 FALSE, /* pc_relative */
1644 0, /* bitpos */
1645 complain_overflow_dont, /* complain_on_overflow */
1646 ppc64_elf_unhandled_reloc, /* special_function */
1647 "R_PPC64_TPREL16_HIGHEST", /* name */
1648 FALSE, /* partial_inplace */
1649 0, /* src_mask */
1650 0xffff, /* dst_mask */
1651 FALSE), /* pcrel_offset */
1652
1653 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1654 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1655 48, /* rightshift */
1656 1, /* size (0 = byte, 1 = short, 2 = long) */
1657 16, /* bitsize */
1658 FALSE, /* pc_relative */
1659 0, /* bitpos */
1660 complain_overflow_dont, /* complain_on_overflow */
1661 ppc64_elf_unhandled_reloc, /* special_function */
1662 "R_PPC64_TPREL16_HIGHESTA", /* name */
1663 FALSE, /* partial_inplace */
1664 0, /* src_mask */
1665 0xffff, /* dst_mask */
1666 FALSE), /* pcrel_offset */
1667
1668 /* Like TPREL16, but for insns with a DS field. */
1669 HOWTO (R_PPC64_TPREL16_DS,
1670 0, /* rightshift */
1671 1, /* size (0 = byte, 1 = short, 2 = long) */
1672 16, /* bitsize */
1673 FALSE, /* pc_relative */
1674 0, /* bitpos */
1675 complain_overflow_signed, /* complain_on_overflow */
1676 ppc64_elf_unhandled_reloc, /* special_function */
1677 "R_PPC64_TPREL16_DS", /* name */
1678 FALSE, /* partial_inplace */
1679 0, /* src_mask */
1680 0xfffc, /* dst_mask */
1681 FALSE), /* pcrel_offset */
1682
1683 /* Like TPREL16_DS, but no overflow. */
1684 HOWTO (R_PPC64_TPREL16_LO_DS,
1685 0, /* rightshift */
1686 1, /* size (0 = byte, 1 = short, 2 = long) */
1687 16, /* bitsize */
1688 FALSE, /* pc_relative */
1689 0, /* bitpos */
1690 complain_overflow_dont, /* complain_on_overflow */
1691 ppc64_elf_unhandled_reloc, /* special_function */
1692 "R_PPC64_TPREL16_LO_DS", /* name */
1693 FALSE, /* partial_inplace */
1694 0, /* src_mask */
1695 0xfffc, /* dst_mask */
1696 FALSE), /* pcrel_offset */
1697
1698 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1699 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1700 to the first entry relative to the TOC base (r2). */
1701 HOWTO (R_PPC64_GOT_TLSGD16,
1702 0, /* rightshift */
1703 1, /* size (0 = byte, 1 = short, 2 = long) */
1704 16, /* bitsize */
1705 FALSE, /* pc_relative */
1706 0, /* bitpos */
1707 complain_overflow_signed, /* complain_on_overflow */
1708 ppc64_elf_unhandled_reloc, /* special_function */
1709 "R_PPC64_GOT_TLSGD16", /* name */
1710 FALSE, /* partial_inplace */
1711 0, /* src_mask */
1712 0xffff, /* dst_mask */
1713 FALSE), /* pcrel_offset */
1714
1715 /* Like GOT_TLSGD16, but no overflow. */
1716 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1717 0, /* rightshift */
1718 1, /* size (0 = byte, 1 = short, 2 = long) */
1719 16, /* bitsize */
1720 FALSE, /* pc_relative */
1721 0, /* bitpos */
1722 complain_overflow_dont, /* complain_on_overflow */
1723 ppc64_elf_unhandled_reloc, /* special_function */
1724 "R_PPC64_GOT_TLSGD16_LO", /* name */
1725 FALSE, /* partial_inplace */
1726 0, /* src_mask */
1727 0xffff, /* dst_mask */
1728 FALSE), /* pcrel_offset */
1729
1730 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1731 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1732 16, /* rightshift */
1733 1, /* size (0 = byte, 1 = short, 2 = long) */
1734 16, /* bitsize */
1735 FALSE, /* pc_relative */
1736 0, /* bitpos */
1737 complain_overflow_signed, /* complain_on_overflow */
1738 ppc64_elf_unhandled_reloc, /* special_function */
1739 "R_PPC64_GOT_TLSGD16_HI", /* name */
1740 FALSE, /* partial_inplace */
1741 0, /* src_mask */
1742 0xffff, /* dst_mask */
1743 FALSE), /* pcrel_offset */
1744
1745 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1746 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1747 16, /* rightshift */
1748 1, /* size (0 = byte, 1 = short, 2 = long) */
1749 16, /* bitsize */
1750 FALSE, /* pc_relative */
1751 0, /* bitpos */
1752 complain_overflow_signed, /* complain_on_overflow */
1753 ppc64_elf_unhandled_reloc, /* special_function */
1754 "R_PPC64_GOT_TLSGD16_HA", /* name */
1755 FALSE, /* partial_inplace */
1756 0, /* src_mask */
1757 0xffff, /* dst_mask */
1758 FALSE), /* pcrel_offset */
1759
1760 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1761 with values (sym+add)@dtpmod and zero, and computes the offset to the
1762 first entry relative to the TOC base (r2). */
1763 HOWTO (R_PPC64_GOT_TLSLD16,
1764 0, /* rightshift */
1765 1, /* size (0 = byte, 1 = short, 2 = long) */
1766 16, /* bitsize */
1767 FALSE, /* pc_relative */
1768 0, /* bitpos */
1769 complain_overflow_signed, /* complain_on_overflow */
1770 ppc64_elf_unhandled_reloc, /* special_function */
1771 "R_PPC64_GOT_TLSLD16", /* name */
1772 FALSE, /* partial_inplace */
1773 0, /* src_mask */
1774 0xffff, /* dst_mask */
1775 FALSE), /* pcrel_offset */
1776
1777 /* Like GOT_TLSLD16, but no overflow. */
1778 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1779 0, /* rightshift */
1780 1, /* size (0 = byte, 1 = short, 2 = long) */
1781 16, /* bitsize */
1782 FALSE, /* pc_relative */
1783 0, /* bitpos */
1784 complain_overflow_dont, /* complain_on_overflow */
1785 ppc64_elf_unhandled_reloc, /* special_function */
1786 "R_PPC64_GOT_TLSLD16_LO", /* name */
1787 FALSE, /* partial_inplace */
1788 0, /* src_mask */
1789 0xffff, /* dst_mask */
1790 FALSE), /* pcrel_offset */
1791
1792 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1793 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1794 16, /* rightshift */
1795 1, /* size (0 = byte, 1 = short, 2 = long) */
1796 16, /* bitsize */
1797 FALSE, /* pc_relative */
1798 0, /* bitpos */
1799 complain_overflow_signed, /* complain_on_overflow */
1800 ppc64_elf_unhandled_reloc, /* special_function */
1801 "R_PPC64_GOT_TLSLD16_HI", /* name */
1802 FALSE, /* partial_inplace */
1803 0, /* src_mask */
1804 0xffff, /* dst_mask */
1805 FALSE), /* pcrel_offset */
1806
1807 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1808 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1809 16, /* rightshift */
1810 1, /* size (0 = byte, 1 = short, 2 = long) */
1811 16, /* bitsize */
1812 FALSE, /* pc_relative */
1813 0, /* bitpos */
1814 complain_overflow_signed, /* complain_on_overflow */
1815 ppc64_elf_unhandled_reloc, /* special_function */
1816 "R_PPC64_GOT_TLSLD16_HA", /* name */
1817 FALSE, /* partial_inplace */
1818 0, /* src_mask */
1819 0xffff, /* dst_mask */
1820 FALSE), /* pcrel_offset */
1821
1822 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1823 the offset to the entry relative to the TOC base (r2). */
1824 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1825 0, /* rightshift */
1826 1, /* size (0 = byte, 1 = short, 2 = long) */
1827 16, /* bitsize */
1828 FALSE, /* pc_relative */
1829 0, /* bitpos */
1830 complain_overflow_signed, /* complain_on_overflow */
1831 ppc64_elf_unhandled_reloc, /* special_function */
1832 "R_PPC64_GOT_DTPREL16_DS", /* name */
1833 FALSE, /* partial_inplace */
1834 0, /* src_mask */
1835 0xfffc, /* dst_mask */
1836 FALSE), /* pcrel_offset */
1837
1838 /* Like GOT_DTPREL16_DS, but no overflow. */
1839 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1840 0, /* rightshift */
1841 1, /* size (0 = byte, 1 = short, 2 = long) */
1842 16, /* bitsize */
1843 FALSE, /* pc_relative */
1844 0, /* bitpos */
1845 complain_overflow_dont, /* complain_on_overflow */
1846 ppc64_elf_unhandled_reloc, /* special_function */
1847 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1848 FALSE, /* partial_inplace */
1849 0, /* src_mask */
1850 0xfffc, /* dst_mask */
1851 FALSE), /* pcrel_offset */
1852
1853 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1854 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1855 16, /* rightshift */
1856 1, /* size (0 = byte, 1 = short, 2 = long) */
1857 16, /* bitsize */
1858 FALSE, /* pc_relative */
1859 0, /* bitpos */
1860 complain_overflow_signed, /* complain_on_overflow */
1861 ppc64_elf_unhandled_reloc, /* special_function */
1862 "R_PPC64_GOT_DTPREL16_HI", /* name */
1863 FALSE, /* partial_inplace */
1864 0, /* src_mask */
1865 0xffff, /* dst_mask */
1866 FALSE), /* pcrel_offset */
1867
1868 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1869 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1870 16, /* rightshift */
1871 1, /* size (0 = byte, 1 = short, 2 = long) */
1872 16, /* bitsize */
1873 FALSE, /* pc_relative */
1874 0, /* bitpos */
1875 complain_overflow_signed, /* complain_on_overflow */
1876 ppc64_elf_unhandled_reloc, /* special_function */
1877 "R_PPC64_GOT_DTPREL16_HA", /* name */
1878 FALSE, /* partial_inplace */
1879 0, /* src_mask */
1880 0xffff, /* dst_mask */
1881 FALSE), /* pcrel_offset */
1882
1883 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1884 offset to the entry relative to the TOC base (r2). */
1885 HOWTO (R_PPC64_GOT_TPREL16_DS,
1886 0, /* rightshift */
1887 1, /* size (0 = byte, 1 = short, 2 = long) */
1888 16, /* bitsize */
1889 FALSE, /* pc_relative */
1890 0, /* bitpos */
1891 complain_overflow_signed, /* complain_on_overflow */
1892 ppc64_elf_unhandled_reloc, /* special_function */
1893 "R_PPC64_GOT_TPREL16_DS", /* name */
1894 FALSE, /* partial_inplace */
1895 0, /* src_mask */
1896 0xfffc, /* dst_mask */
1897 FALSE), /* pcrel_offset */
1898
1899 /* Like GOT_TPREL16_DS, but no overflow. */
1900 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1901 0, /* rightshift */
1902 1, /* size (0 = byte, 1 = short, 2 = long) */
1903 16, /* bitsize */
1904 FALSE, /* pc_relative */
1905 0, /* bitpos */
1906 complain_overflow_dont, /* complain_on_overflow */
1907 ppc64_elf_unhandled_reloc, /* special_function */
1908 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1909 FALSE, /* partial_inplace */
1910 0, /* src_mask */
1911 0xfffc, /* dst_mask */
1912 FALSE), /* pcrel_offset */
1913
1914 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1915 HOWTO (R_PPC64_GOT_TPREL16_HI,
1916 16, /* rightshift */
1917 1, /* size (0 = byte, 1 = short, 2 = long) */
1918 16, /* bitsize */
1919 FALSE, /* pc_relative */
1920 0, /* bitpos */
1921 complain_overflow_signed, /* complain_on_overflow */
1922 ppc64_elf_unhandled_reloc, /* special_function */
1923 "R_PPC64_GOT_TPREL16_HI", /* name */
1924 FALSE, /* partial_inplace */
1925 0, /* src_mask */
1926 0xffff, /* dst_mask */
1927 FALSE), /* pcrel_offset */
1928
1929 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1930 HOWTO (R_PPC64_GOT_TPREL16_HA,
1931 16, /* rightshift */
1932 1, /* size (0 = byte, 1 = short, 2 = long) */
1933 16, /* bitsize */
1934 FALSE, /* pc_relative */
1935 0, /* bitpos */
1936 complain_overflow_signed, /* complain_on_overflow */
1937 ppc64_elf_unhandled_reloc, /* special_function */
1938 "R_PPC64_GOT_TPREL16_HA", /* name */
1939 FALSE, /* partial_inplace */
1940 0, /* src_mask */
1941 0xffff, /* dst_mask */
1942 FALSE), /* pcrel_offset */
1943
1944 HOWTO (R_PPC64_JMP_IREL, /* type */
1945 0, /* rightshift */
1946 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1947 0, /* bitsize */
1948 FALSE, /* pc_relative */
1949 0, /* bitpos */
1950 complain_overflow_dont, /* complain_on_overflow */
1951 ppc64_elf_unhandled_reloc, /* special_function */
1952 "R_PPC64_JMP_IREL", /* name */
1953 FALSE, /* partial_inplace */
1954 0, /* src_mask */
1955 0, /* dst_mask */
1956 FALSE), /* pcrel_offset */
1957
1958 HOWTO (R_PPC64_IRELATIVE, /* type */
1959 0, /* rightshift */
1960 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1961 64, /* bitsize */
1962 FALSE, /* pc_relative */
1963 0, /* bitpos */
1964 complain_overflow_dont, /* complain_on_overflow */
1965 bfd_elf_generic_reloc, /* special_function */
1966 "R_PPC64_IRELATIVE", /* name */
1967 FALSE, /* partial_inplace */
1968 0, /* src_mask */
1969 ONES (64), /* dst_mask */
1970 FALSE), /* pcrel_offset */
1971
1972 /* A 16 bit relative relocation. */
1973 HOWTO (R_PPC64_REL16, /* type */
1974 0, /* rightshift */
1975 1, /* size (0 = byte, 1 = short, 2 = long) */
1976 16, /* bitsize */
1977 TRUE, /* pc_relative */
1978 0, /* bitpos */
1979 complain_overflow_signed, /* complain_on_overflow */
1980 bfd_elf_generic_reloc, /* special_function */
1981 "R_PPC64_REL16", /* name */
1982 FALSE, /* partial_inplace */
1983 0, /* src_mask */
1984 0xffff, /* dst_mask */
1985 TRUE), /* pcrel_offset */
1986
1987 /* A 16 bit relative relocation without overflow. */
1988 HOWTO (R_PPC64_REL16_LO, /* type */
1989 0, /* rightshift */
1990 1, /* size (0 = byte, 1 = short, 2 = long) */
1991 16, /* bitsize */
1992 TRUE, /* pc_relative */
1993 0, /* bitpos */
1994 complain_overflow_dont,/* complain_on_overflow */
1995 bfd_elf_generic_reloc, /* special_function */
1996 "R_PPC64_REL16_LO", /* name */
1997 FALSE, /* partial_inplace */
1998 0, /* src_mask */
1999 0xffff, /* dst_mask */
2000 TRUE), /* pcrel_offset */
2001
2002 /* The high order 16 bits of a relative address. */
2003 HOWTO (R_PPC64_REL16_HI, /* type */
2004 16, /* rightshift */
2005 1, /* size (0 = byte, 1 = short, 2 = long) */
2006 16, /* bitsize */
2007 TRUE, /* pc_relative */
2008 0, /* bitpos */
2009 complain_overflow_signed, /* complain_on_overflow */
2010 bfd_elf_generic_reloc, /* special_function */
2011 "R_PPC64_REL16_HI", /* name */
2012 FALSE, /* partial_inplace */
2013 0, /* src_mask */
2014 0xffff, /* dst_mask */
2015 TRUE), /* pcrel_offset */
2016
2017 /* The high order 16 bits of a relative address, plus 1 if the contents of
2018 the low 16 bits, treated as a signed number, is negative. */
2019 HOWTO (R_PPC64_REL16_HA, /* type */
2020 16, /* rightshift */
2021 1, /* size (0 = byte, 1 = short, 2 = long) */
2022 16, /* bitsize */
2023 TRUE, /* pc_relative */
2024 0, /* bitpos */
2025 complain_overflow_signed, /* complain_on_overflow */
2026 ppc64_elf_ha_reloc, /* special_function */
2027 "R_PPC64_REL16_HA", /* name */
2028 FALSE, /* partial_inplace */
2029 0, /* src_mask */
2030 0xffff, /* dst_mask */
2031 TRUE), /* pcrel_offset */
2032
2033 /* Like R_PPC64_REL16_HA but for split field in addpcis. */
2034 HOWTO (R_PPC64_REL16DX_HA, /* type */
2035 16, /* rightshift */
2036 2, /* size (0 = byte, 1 = short, 2 = long) */
2037 16, /* bitsize */
2038 TRUE, /* pc_relative */
2039 0, /* bitpos */
2040 complain_overflow_signed, /* complain_on_overflow */
2041 ppc64_elf_ha_reloc, /* special_function */
2042 "R_PPC64_REL16DX_HA", /* name */
2043 FALSE, /* partial_inplace */
2044 0, /* src_mask */
2045 0x1fffc1, /* dst_mask */
2046 TRUE), /* pcrel_offset */
2047
2048 /* Like R_PPC64_ADDR16_HI, but no overflow. */
2049 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
2050 16, /* rightshift */
2051 1, /* size (0 = byte, 1 = short, 2 = long) */
2052 16, /* bitsize */
2053 FALSE, /* pc_relative */
2054 0, /* bitpos */
2055 complain_overflow_dont, /* complain_on_overflow */
2056 bfd_elf_generic_reloc, /* special_function */
2057 "R_PPC64_ADDR16_HIGH", /* name */
2058 FALSE, /* partial_inplace */
2059 0, /* src_mask */
2060 0xffff, /* dst_mask */
2061 FALSE), /* pcrel_offset */
2062
2063 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2064 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2065 16, /* rightshift */
2066 1, /* size (0 = byte, 1 = short, 2 = long) */
2067 16, /* bitsize */
2068 FALSE, /* pc_relative */
2069 0, /* bitpos */
2070 complain_overflow_dont, /* complain_on_overflow */
2071 ppc64_elf_ha_reloc, /* special_function */
2072 "R_PPC64_ADDR16_HIGHA", /* name */
2073 FALSE, /* partial_inplace */
2074 0, /* src_mask */
2075 0xffff, /* dst_mask */
2076 FALSE), /* pcrel_offset */
2077
2078 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2079 HOWTO (R_PPC64_DTPREL16_HIGH,
2080 16, /* rightshift */
2081 1, /* size (0 = byte, 1 = short, 2 = long) */
2082 16, /* bitsize */
2083 FALSE, /* pc_relative */
2084 0, /* bitpos */
2085 complain_overflow_dont, /* complain_on_overflow */
2086 ppc64_elf_unhandled_reloc, /* special_function */
2087 "R_PPC64_DTPREL16_HIGH", /* name */
2088 FALSE, /* partial_inplace */
2089 0, /* src_mask */
2090 0xffff, /* dst_mask */
2091 FALSE), /* pcrel_offset */
2092
2093 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2094 HOWTO (R_PPC64_DTPREL16_HIGHA,
2095 16, /* rightshift */
2096 1, /* size (0 = byte, 1 = short, 2 = long) */
2097 16, /* bitsize */
2098 FALSE, /* pc_relative */
2099 0, /* bitpos */
2100 complain_overflow_dont, /* complain_on_overflow */
2101 ppc64_elf_unhandled_reloc, /* special_function */
2102 "R_PPC64_DTPREL16_HIGHA", /* name */
2103 FALSE, /* partial_inplace */
2104 0, /* src_mask */
2105 0xffff, /* dst_mask */
2106 FALSE), /* pcrel_offset */
2107
2108 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2109 HOWTO (R_PPC64_TPREL16_HIGH,
2110 16, /* rightshift */
2111 1, /* size (0 = byte, 1 = short, 2 = long) */
2112 16, /* bitsize */
2113 FALSE, /* pc_relative */
2114 0, /* bitpos */
2115 complain_overflow_dont, /* complain_on_overflow */
2116 ppc64_elf_unhandled_reloc, /* special_function */
2117 "R_PPC64_TPREL16_HIGH", /* name */
2118 FALSE, /* partial_inplace */
2119 0, /* src_mask */
2120 0xffff, /* dst_mask */
2121 FALSE), /* pcrel_offset */
2122
2123 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2124 HOWTO (R_PPC64_TPREL16_HIGHA,
2125 16, /* rightshift */
2126 1, /* size (0 = byte, 1 = short, 2 = long) */
2127 16, /* bitsize */
2128 FALSE, /* pc_relative */
2129 0, /* bitpos */
2130 complain_overflow_dont, /* complain_on_overflow */
2131 ppc64_elf_unhandled_reloc, /* special_function */
2132 "R_PPC64_TPREL16_HIGHA", /* name */
2133 FALSE, /* partial_inplace */
2134 0, /* src_mask */
2135 0xffff, /* dst_mask */
2136 FALSE), /* pcrel_offset */
2137
2138 /* Marker reloc on ELFv2 large-model function entry. */
2139 HOWTO (R_PPC64_ENTRY,
2140 0, /* rightshift */
2141 2, /* size (0 = byte, 1 = short, 2 = long) */
2142 32, /* bitsize */
2143 FALSE, /* pc_relative */
2144 0, /* bitpos */
2145 complain_overflow_dont, /* complain_on_overflow */
2146 bfd_elf_generic_reloc, /* special_function */
2147 "R_PPC64_ENTRY", /* name */
2148 FALSE, /* partial_inplace */
2149 0, /* src_mask */
2150 0, /* dst_mask */
2151 FALSE), /* pcrel_offset */
2152
2153 /* Like ADDR64, but use local entry point of function. */
2154 HOWTO (R_PPC64_ADDR64_LOCAL, /* type */
2155 0, /* rightshift */
2156 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
2157 64, /* bitsize */
2158 FALSE, /* pc_relative */
2159 0, /* bitpos */
2160 complain_overflow_dont, /* complain_on_overflow */
2161 bfd_elf_generic_reloc, /* special_function */
2162 "R_PPC64_ADDR64_LOCAL", /* name */
2163 FALSE, /* partial_inplace */
2164 0, /* src_mask */
2165 ONES (64), /* dst_mask */
2166 FALSE), /* pcrel_offset */
2167
2168 /* GNU extension to record C++ vtable hierarchy. */
2169 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2170 0, /* rightshift */
2171 0, /* size (0 = byte, 1 = short, 2 = long) */
2172 0, /* bitsize */
2173 FALSE, /* pc_relative */
2174 0, /* bitpos */
2175 complain_overflow_dont, /* complain_on_overflow */
2176 NULL, /* special_function */
2177 "R_PPC64_GNU_VTINHERIT", /* name */
2178 FALSE, /* partial_inplace */
2179 0, /* src_mask */
2180 0, /* dst_mask */
2181 FALSE), /* pcrel_offset */
2182
2183 /* GNU extension to record C++ vtable member usage. */
2184 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2185 0, /* rightshift */
2186 0, /* size (0 = byte, 1 = short, 2 = long) */
2187 0, /* bitsize */
2188 FALSE, /* pc_relative */
2189 0, /* bitpos */
2190 complain_overflow_dont, /* complain_on_overflow */
2191 NULL, /* special_function */
2192 "R_PPC64_GNU_VTENTRY", /* name */
2193 FALSE, /* partial_inplace */
2194 0, /* src_mask */
2195 0, /* dst_mask */
2196 FALSE), /* pcrel_offset */
2197};
2198
2199\f
2200/* Initialize the ppc64_elf_howto_table, so that linear accesses can
2201 be done. */
2202
2203static void
2204ppc_howto_init (void)
2205{
2206 unsigned int i, type;
2207
2208 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2209 {
2210 type = ppc64_elf_howto_raw[i].type;
2211 BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table));
2212 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2213 }
2214}
2215
2216static reloc_howto_type *
2217ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2218 bfd_reloc_code_real_type code)
2219{
2220 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2221
2222 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2223 /* Initialize howto table if needed. */
2224 ppc_howto_init ();
2225
2226 switch (code)
2227 {
2228 default:
2229 return NULL;
2230
2231 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2232 break;
2233 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2234 break;
2235 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2236 break;
2237 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2238 break;
2239 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2240 break;
2241 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2242 break;
2243 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2244 break;
2245 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2246 break;
2247 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2248 break;
2249 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2250 break;
2251 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2252 break;
2253 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2254 break;
2255 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2256 break;
2257 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2258 break;
2259 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2260 break;
2261 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2262 break;
2263 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2264 break;
2265 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2266 break;
2267 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2268 break;
2269 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2270 break;
2271 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2272 break;
2273 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2274 break;
2275 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2276 break;
2277 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2278 break;
2279 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2280 break;
2281 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2282 break;
2283 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2284 break;
2285 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2286 break;
2287 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2288 break;
2289 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2290 break;
2291 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2292 break;
2293 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2294 break;
2295 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2296 break;
2297 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2298 break;
2299 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2300 break;
2301 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2302 break;
2303 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2304 break;
2305 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2306 break;
2307 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2308 break;
2309 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2310 break;
2311 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2312 break;
2313 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2314 break;
2315 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2316 break;
2317 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2318 break;
2319 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2320 break;
2321 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2322 break;
2323 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2324 break;
2325 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2326 break;
2327 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2328 break;
2329 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2330 break;
2331 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2332 break;
2333 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2334 break;
2335 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2336 break;
2337 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2338 break;
2339 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2340 break;
2341 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2342 break;
2343 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2344 break;
2345 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2346 break;
2347 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2348 break;
2349 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2350 break;
2351 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2352 break;
2353 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2354 break;
2355 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2356 break;
2357 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2358 break;
2359 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2360 break;
2361 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2362 break;
2363 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2364 break;
2365 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2366 break;
2367 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2368 break;
2369 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2370 break;
2371 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2372 break;
2373 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2374 break;
2375 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2376 break;
2377 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2378 break;
2379 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2380 break;
2381 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2382 break;
2383 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2384 break;
2385 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2386 break;
2387 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2388 break;
2389 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2390 break;
2391 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2392 break;
2393 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2394 break;
2395 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2396 break;
2397 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2398 break;
2399 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2400 break;
2401 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2402 break;
2403 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2404 break;
2405 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2406 break;
2407 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2408 break;
2409 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2410 break;
2411 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2412 break;
2413 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2414 break;
2415 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2416 break;
2417 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2418 break;
2419 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2420 break;
2421 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2422 break;
2423 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2424 break;
2425 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2426 break;
2427 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2428 break;
2429 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2430 break;
2431 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2432 break;
2433 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2434 break;
2435 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2436 break;
2437 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2438 break;
2439 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2440 break;
2441 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2442 break;
2443 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2444 break;
2445 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2446 break;
2447 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2448 break;
2449 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2450 break;
2451 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2452 break;
2453 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA;
2454 break;
2455 case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY;
2456 break;
2457 case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL;
2458 break;
2459 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2460 break;
2461 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2462 break;
2463 }
2464
2465 return ppc64_elf_howto_table[r];
2466};
2467
2468static reloc_howto_type *
2469ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2470 const char *r_name)
2471{
2472 unsigned int i;
2473
2474 for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++)
2475 if (ppc64_elf_howto_raw[i].name != NULL
2476 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2477 return &ppc64_elf_howto_raw[i];
2478
2479 return NULL;
2480}
2481
2482/* Set the howto pointer for a PowerPC ELF reloc. */
2483
2484static void
2485ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2486 Elf_Internal_Rela *dst)
2487{
2488 unsigned int type;
2489
2490 /* Initialize howto table if needed. */
2491 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2492 ppc_howto_init ();
2493
2494 type = ELF64_R_TYPE (dst->r_info);
2495 if (type >= ARRAY_SIZE (ppc64_elf_howto_table))
2496 {
2497 /* xgettext:c-format */
2498 _bfd_error_handler (_("%B: invalid relocation type %d"),
2499 abfd, (int) type);
2500 type = R_PPC64_NONE;
2501 }
2502 cache_ptr->howto = ppc64_elf_howto_table[type];
2503}
2504
2505/* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2506
2507static bfd_reloc_status_type
2508ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511{
2512 enum elf_ppc64_reloc_type r_type;
2513 long insn;
2514 bfd_size_type octets;
2515 bfd_vma value;
2516
2517 /* If this is a relocatable link (output_bfd test tells us), just
2518 call the generic function. Any adjustment will be done at final
2519 link time. */
2520 if (output_bfd != NULL)
2521 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2522 input_section, output_bfd, error_message);
2523
2524 /* Adjust the addend for sign extension of the low 16 bits.
2525 We won't actually be using the low 16 bits, so trashing them
2526 doesn't matter. */
2527 reloc_entry->addend += 0x8000;
2528 r_type = reloc_entry->howto->type;
2529 if (r_type != R_PPC64_REL16DX_HA)
2530 return bfd_reloc_continue;
2531
2532 value = 0;
2533 if (!bfd_is_com_section (symbol->section))
2534 value = symbol->value;
2535 value += (reloc_entry->addend
2536 + symbol->section->output_offset
2537 + symbol->section->output_section->vma);
2538 value -= (reloc_entry->address
2539 + input_section->output_offset
2540 + input_section->output_section->vma);
2541 value = (bfd_signed_vma) value >> 16;
2542
2543 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2544 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2545 insn &= ~0x1fffc1;
2546 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2547 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2548 if (value + 0x8000 > 0xffff)
2549 return bfd_reloc_overflow;
2550 return bfd_reloc_ok;
2551}
2552
2553static bfd_reloc_status_type
2554ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2555 void *data, asection *input_section,
2556 bfd *output_bfd, char **error_message)
2557{
2558 if (output_bfd != NULL)
2559 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2560 input_section, output_bfd, error_message);
2561
2562 if (strcmp (symbol->section->name, ".opd") == 0
2563 && (symbol->section->owner->flags & DYNAMIC) == 0)
2564 {
2565 bfd_vma dest = opd_entry_value (symbol->section,
2566 symbol->value + reloc_entry->addend,
2567 NULL, NULL, FALSE);
2568 if (dest != (bfd_vma) -1)
2569 reloc_entry->addend = dest - (symbol->value
2570 + symbol->section->output_section->vma
2571 + symbol->section->output_offset);
2572 }
2573 else
2574 {
2575 elf_symbol_type *elfsym = (elf_symbol_type *) symbol;
2576
2577 if (symbol->section->owner != abfd
2578 && symbol->section->owner != NULL
2579 && abiversion (symbol->section->owner) >= 2)
2580 {
2581 unsigned int i;
2582
2583 for (i = 0; i < symbol->section->owner->symcount; ++i)
2584 {
2585 asymbol *symdef = symbol->section->owner->outsymbols[i];
2586
2587 if (strcmp (symdef->name, symbol->name) == 0)
2588 {
2589 elfsym = (elf_symbol_type *) symdef;
2590 break;
2591 }
2592 }
2593 }
2594 reloc_entry->addend
2595 += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other);
2596 }
2597 return bfd_reloc_continue;
2598}
2599
2600static bfd_reloc_status_type
2601ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2602 void *data, asection *input_section,
2603 bfd *output_bfd, char **error_message)
2604{
2605 long insn;
2606 enum elf_ppc64_reloc_type r_type;
2607 bfd_size_type octets;
2608 /* Assume 'at' branch hints. */
2609 bfd_boolean is_isa_v2 = TRUE;
2610
2611 /* If this is a relocatable link (output_bfd test tells us), just
2612 call the generic function. Any adjustment will be done at final
2613 link time. */
2614 if (output_bfd != NULL)
2615 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2616 input_section, output_bfd, error_message);
2617
2618 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2619 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2620 insn &= ~(0x01 << 21);
2621 r_type = reloc_entry->howto->type;
2622 if (r_type == R_PPC64_ADDR14_BRTAKEN
2623 || r_type == R_PPC64_REL14_BRTAKEN)
2624 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2625
2626 if (is_isa_v2)
2627 {
2628 /* Set 'a' bit. This is 0b00010 in BO field for branch
2629 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2630 for branch on CTR insns (BO == 1a00t or 1a01t). */
2631 if ((insn & (0x14 << 21)) == (0x04 << 21))
2632 insn |= 0x02 << 21;
2633 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2634 insn |= 0x08 << 21;
2635 else
2636 goto out;
2637 }
2638 else
2639 {
2640 bfd_vma target = 0;
2641 bfd_vma from;
2642
2643 if (!bfd_is_com_section (symbol->section))
2644 target = symbol->value;
2645 target += symbol->section->output_section->vma;
2646 target += symbol->section->output_offset;
2647 target += reloc_entry->addend;
2648
2649 from = (reloc_entry->address
2650 + input_section->output_offset
2651 + input_section->output_section->vma);
2652
2653 /* Invert 'y' bit if not the default. */
2654 if ((bfd_signed_vma) (target - from) < 0)
2655 insn ^= 0x01 << 21;
2656 }
2657 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2658 out:
2659 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2660 input_section, output_bfd, error_message);
2661}
2662
2663static bfd_reloc_status_type
2664ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2665 void *data, asection *input_section,
2666 bfd *output_bfd, char **error_message)
2667{
2668 /* If this is a relocatable link (output_bfd test tells us), just
2669 call the generic function. Any adjustment will be done at final
2670 link time. */
2671 if (output_bfd != NULL)
2672 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2673 input_section, output_bfd, error_message);
2674
2675 /* Subtract the symbol section base address. */
2676 reloc_entry->addend -= symbol->section->output_section->vma;
2677 return bfd_reloc_continue;
2678}
2679
2680static bfd_reloc_status_type
2681ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2682 void *data, asection *input_section,
2683 bfd *output_bfd, char **error_message)
2684{
2685 /* If this is a relocatable link (output_bfd test tells us), just
2686 call the generic function. Any adjustment will be done at final
2687 link time. */
2688 if (output_bfd != NULL)
2689 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2690 input_section, output_bfd, error_message);
2691
2692 /* Subtract the symbol section base address. */
2693 reloc_entry->addend -= symbol->section->output_section->vma;
2694
2695 /* Adjust the addend for sign extension of the low 16 bits. */
2696 reloc_entry->addend += 0x8000;
2697 return bfd_reloc_continue;
2698}
2699
2700static bfd_reloc_status_type
2701ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2702 void *data, asection *input_section,
2703 bfd *output_bfd, char **error_message)
2704{
2705 bfd_vma TOCstart;
2706
2707 /* If this is a relocatable link (output_bfd test tells us), just
2708 call the generic function. Any adjustment will be done at final
2709 link time. */
2710 if (output_bfd != NULL)
2711 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2712 input_section, output_bfd, error_message);
2713
2714 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2715 if (TOCstart == 0)
2716 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2717
2718 /* Subtract the TOC base address. */
2719 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2720 return bfd_reloc_continue;
2721}
2722
2723static bfd_reloc_status_type
2724ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2725 void *data, asection *input_section,
2726 bfd *output_bfd, char **error_message)
2727{
2728 bfd_vma TOCstart;
2729
2730 /* If this is a relocatable link (output_bfd test tells us), just
2731 call the generic function. Any adjustment will be done at final
2732 link time. */
2733 if (output_bfd != NULL)
2734 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2735 input_section, output_bfd, error_message);
2736
2737 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2738 if (TOCstart == 0)
2739 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2740
2741 /* Subtract the TOC base address. */
2742 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2743
2744 /* Adjust the addend for sign extension of the low 16 bits. */
2745 reloc_entry->addend += 0x8000;
2746 return bfd_reloc_continue;
2747}
2748
2749static bfd_reloc_status_type
2750ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2751 void *data, asection *input_section,
2752 bfd *output_bfd, char **error_message)
2753{
2754 bfd_vma TOCstart;
2755 bfd_size_type octets;
2756
2757 /* If this is a relocatable link (output_bfd test tells us), just
2758 call the generic function. Any adjustment will be done at final
2759 link time. */
2760 if (output_bfd != NULL)
2761 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2762 input_section, output_bfd, error_message);
2763
2764 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2765 if (TOCstart == 0)
2766 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2767
2768 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2769 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2770 return bfd_reloc_ok;
2771}
2772
2773static bfd_reloc_status_type
2774ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2775 void *data, asection *input_section,
2776 bfd *output_bfd, char **error_message)
2777{
2778 /* If this is a relocatable link (output_bfd test tells us), just
2779 call the generic function. Any adjustment will be done at final
2780 link time. */
2781 if (output_bfd != NULL)
2782 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2783 input_section, output_bfd, error_message);
2784
2785 if (error_message != NULL)
2786 {
2787 static char buf[60];
2788 sprintf (buf, "generic linker can't handle %s",
2789 reloc_entry->howto->name);
2790 *error_message = buf;
2791 }
2792 return bfd_reloc_dangerous;
2793}
2794
2795/* Track GOT entries needed for a given symbol. We might need more
2796 than one got entry per symbol. */
2797struct got_entry
2798{
2799 struct got_entry *next;
2800
2801 /* The symbol addend that we'll be placing in the GOT. */
2802 bfd_vma addend;
2803
2804 /* Unlike other ELF targets, we use separate GOT entries for the same
2805 symbol referenced from different input files. This is to support
2806 automatic multiple TOC/GOT sections, where the TOC base can vary
2807 from one input file to another. After partitioning into TOC groups
2808 we merge entries within the group.
2809
2810 Point to the BFD owning this GOT entry. */
2811 bfd *owner;
2812
2813 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2814 TLS_TPREL or TLS_DTPREL for tls entries. */
2815 unsigned char tls_type;
2816
2817 /* Non-zero if got.ent points to real entry. */
2818 unsigned char is_indirect;
2819
2820 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2821 union
2822 {
2823 bfd_signed_vma refcount;
2824 bfd_vma offset;
2825 struct got_entry *ent;
2826 } got;
2827};
2828
2829/* The same for PLT. */
2830struct plt_entry
2831{
2832 struct plt_entry *next;
2833
2834 bfd_vma addend;
2835
2836 union
2837 {
2838 bfd_signed_vma refcount;
2839 bfd_vma offset;
2840 } plt;
2841};
2842
2843struct ppc64_elf_obj_tdata
2844{
2845 struct elf_obj_tdata elf;
2846
2847 /* Shortcuts to dynamic linker sections. */
2848 asection *got;
2849 asection *relgot;
2850
2851 /* Used during garbage collection. We attach global symbols defined
2852 on removed .opd entries to this section so that the sym is removed. */
2853 asection *deleted_section;
2854
2855 /* TLS local dynamic got entry handling. Support for multiple GOT
2856 sections means we potentially need one of these for each input bfd. */
2857 struct got_entry tlsld_got;
2858
2859 union {
2860 /* A copy of relocs before they are modified for --emit-relocs. */
2861 Elf_Internal_Rela *relocs;
2862
2863 /* Section contents. */
2864 bfd_byte *contents;
2865 } opd;
2866
2867 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2868 the reloc to be in the range -32768 to 32767. */
2869 unsigned int has_small_toc_reloc : 1;
2870
2871 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2872 instruction not one we handle. */
2873 unsigned int unexpected_toc_insn : 1;
2874};
2875
2876#define ppc64_elf_tdata(bfd) \
2877 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2878
2879#define ppc64_tlsld_got(bfd) \
2880 (&ppc64_elf_tdata (bfd)->tlsld_got)
2881
2882#define is_ppc64_elf(bfd) \
2883 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2884 && elf_object_id (bfd) == PPC64_ELF_DATA)
2885
2886/* Override the generic function because we store some extras. */
2887
2888static bfd_boolean
2889ppc64_elf_mkobject (bfd *abfd)
2890{
2891 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2892 PPC64_ELF_DATA);
2893}
2894
2895/* Fix bad default arch selected for a 64 bit input bfd when the
2896 default is 32 bit. Also select arch based on apuinfo. */
2897
2898static bfd_boolean
2899ppc64_elf_object_p (bfd *abfd)
2900{
2901 if (!abfd->arch_info->the_default)
2902 return TRUE;
2903
2904 if (abfd->arch_info->bits_per_word == 32)
2905 {
2906 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2907
2908 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2909 {
2910 /* Relies on arch after 32 bit default being 64 bit default. */
2911 abfd->arch_info = abfd->arch_info->next;
2912 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2913 }
2914 }
2915 return _bfd_elf_ppc_set_arch (abfd);
2916}
2917
2918/* Support for core dump NOTE sections. */
2919
2920static bfd_boolean
2921ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2922{
2923 size_t offset, size;
2924
2925 if (note->descsz != 504)
2926 return FALSE;
2927
2928 /* pr_cursig */
2929 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2930
2931 /* pr_pid */
2932 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2933
2934 /* pr_reg */
2935 offset = 112;
2936 size = 384;
2937
2938 /* Make a ".reg/999" section. */
2939 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2940 size, note->descpos + offset);
2941}
2942
2943static bfd_boolean
2944ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2945{
2946 if (note->descsz != 136)
2947 return FALSE;
2948
2949 elf_tdata (abfd)->core->pid
2950 = bfd_get_32 (abfd, note->descdata + 24);
2951 elf_tdata (abfd)->core->program
2952 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2953 elf_tdata (abfd)->core->command
2954 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2955
2956 return TRUE;
2957}
2958
2959static char *
2960ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2961 ...)
2962{
2963 switch (note_type)
2964 {
2965 default:
2966 return NULL;
2967
2968 case NT_PRPSINFO:
2969 {
2970 char data[136];
2971 va_list ap;
2972
2973 va_start (ap, note_type);
2974 memset (data, 0, sizeof (data));
2975 strncpy (data + 40, va_arg (ap, const char *), 16);
2976 strncpy (data + 56, va_arg (ap, const char *), 80);
2977 va_end (ap);
2978 return elfcore_write_note (abfd, buf, bufsiz,
2979 "CORE", note_type, data, sizeof (data));
2980 }
2981
2982 case NT_PRSTATUS:
2983 {
2984 char data[504];
2985 va_list ap;
2986 long pid;
2987 int cursig;
2988 const void *greg;
2989
2990 va_start (ap, note_type);
2991 memset (data, 0, 112);
2992 pid = va_arg (ap, long);
2993 bfd_put_32 (abfd, pid, data + 32);
2994 cursig = va_arg (ap, int);
2995 bfd_put_16 (abfd, cursig, data + 12);
2996 greg = va_arg (ap, const void *);
2997 memcpy (data + 112, greg, 384);
2998 memset (data + 496, 0, 8);
2999 va_end (ap);
3000 return elfcore_write_note (abfd, buf, bufsiz,
3001 "CORE", note_type, data, sizeof (data));
3002 }
3003 }
3004}
3005
3006/* Add extra PPC sections. */
3007
3008static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
3009{
3010 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
3011 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3012 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3013 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3014 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
3015 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
3016 { NULL, 0, 0, 0, 0 }
3017};
3018
3019enum _ppc64_sec_type {
3020 sec_normal = 0,
3021 sec_opd = 1,
3022 sec_toc = 2
3023};
3024
3025struct _ppc64_elf_section_data
3026{
3027 struct bfd_elf_section_data elf;
3028
3029 union
3030 {
3031 /* An array with one entry for each opd function descriptor,
3032 and some spares since opd entries may be either 16 or 24 bytes. */
3033#define OPD_NDX(OFF) ((OFF) >> 4)
3034 struct _opd_sec_data
3035 {
3036 /* Points to the function code section for local opd entries. */
3037 asection **func_sec;
3038
3039 /* After editing .opd, adjust references to opd local syms. */
3040 long *adjust;
3041 } opd;
3042
3043 /* An array for toc sections, indexed by offset/8. */
3044 struct _toc_sec_data
3045 {
3046 /* Specifies the relocation symbol index used at a given toc offset. */
3047 unsigned *symndx;
3048
3049 /* And the relocation addend. */
3050 bfd_vma *add;
3051 } toc;
3052 } u;
3053
3054 enum _ppc64_sec_type sec_type:2;
3055
3056 /* Flag set when small branches are detected. Used to
3057 select suitable defaults for the stub group size. */
3058 unsigned int has_14bit_branch:1;
3059};
3060
3061#define ppc64_elf_section_data(sec) \
3062 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
3063
3064static bfd_boolean
3065ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
3066{
3067 if (!sec->used_by_bfd)
3068 {
3069 struct _ppc64_elf_section_data *sdata;
3070 bfd_size_type amt = sizeof (*sdata);
3071
3072 sdata = bfd_zalloc (abfd, amt);
3073 if (sdata == NULL)
3074 return FALSE;
3075 sec->used_by_bfd = sdata;
3076 }
3077
3078 return _bfd_elf_new_section_hook (abfd, sec);
3079}
3080
3081static struct _opd_sec_data *
3082get_opd_info (asection * sec)
3083{
3084 if (sec != NULL
3085 && ppc64_elf_section_data (sec) != NULL
3086 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
3087 return &ppc64_elf_section_data (sec)->u.opd;
3088 return NULL;
3089}
3090\f
3091/* Parameters for the qsort hook. */
3092static bfd_boolean synthetic_relocatable;
3093static asection *synthetic_opd;
3094
3095/* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
3096
3097static int
3098compare_symbols (const void *ap, const void *bp)
3099{
3100 const asymbol *a = * (const asymbol **) ap;
3101 const asymbol *b = * (const asymbol **) bp;
3102
3103 /* Section symbols first. */
3104 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
3105 return -1;
3106 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
3107 return 1;
3108
3109 /* then .opd symbols. */
3110 if (synthetic_opd != NULL)
3111 {
3112 if (strcmp (a->section->name, ".opd") == 0
3113 && strcmp (b->section->name, ".opd") != 0)
3114 return -1;
3115 if (strcmp (a->section->name, ".opd") != 0
3116 && strcmp (b->section->name, ".opd") == 0)
3117 return 1;
3118 }
3119
3120 /* then other code symbols. */
3121 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3122 == (SEC_CODE | SEC_ALLOC)
3123 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3124 != (SEC_CODE | SEC_ALLOC))
3125 return -1;
3126
3127 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3128 != (SEC_CODE | SEC_ALLOC)
3129 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3130 == (SEC_CODE | SEC_ALLOC))
3131 return 1;
3132
3133 if (synthetic_relocatable)
3134 {
3135 if (a->section->id < b->section->id)
3136 return -1;
3137
3138 if (a->section->id > b->section->id)
3139 return 1;
3140 }
3141
3142 if (a->value + a->section->vma < b->value + b->section->vma)
3143 return -1;
3144
3145 if (a->value + a->section->vma > b->value + b->section->vma)
3146 return 1;
3147
3148 /* For syms with the same value, prefer strong dynamic global function
3149 syms over other syms. */
3150 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3151 return -1;
3152
3153 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3154 return 1;
3155
3156 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3157 return -1;
3158
3159 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3160 return 1;
3161
3162 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3163 return -1;
3164
3165 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3166 return 1;
3167
3168 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3169 return -1;
3170
3171 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3172 return 1;
3173
3174 return 0;
3175}
3176
3177/* Search SYMS for a symbol of the given VALUE. */
3178
3179static asymbol *
3180sym_exists_at (asymbol **syms, long lo, long hi, unsigned int id, bfd_vma value)
3181{
3182 long mid;
3183
3184 if (id == (unsigned) -1)
3185 {
3186 while (lo < hi)
3187 {
3188 mid = (lo + hi) >> 1;
3189 if (syms[mid]->value + syms[mid]->section->vma < value)
3190 lo = mid + 1;
3191 else if (syms[mid]->value + syms[mid]->section->vma > value)
3192 hi = mid;
3193 else
3194 return syms[mid];
3195 }
3196 }
3197 else
3198 {
3199 while (lo < hi)
3200 {
3201 mid = (lo + hi) >> 1;
3202 if (syms[mid]->section->id < id)
3203 lo = mid + 1;
3204 else if (syms[mid]->section->id > id)
3205 hi = mid;
3206 else if (syms[mid]->value < value)
3207 lo = mid + 1;
3208 else if (syms[mid]->value > value)
3209 hi = mid;
3210 else
3211 return syms[mid];
3212 }
3213 }
3214 return NULL;
3215}
3216
3217static bfd_boolean
3218section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3219{
3220 bfd_vma vma = *(bfd_vma *) ptr;
3221 return ((section->flags & SEC_ALLOC) != 0
3222 && section->vma <= vma
3223 && vma < section->vma + section->size);
3224}
3225
3226/* Create synthetic symbols, effectively restoring "dot-symbol" function
3227 entry syms. Also generate @plt symbols for the glink branch table.
3228 Returns count of synthetic symbols in RET or -1 on error. */
3229
3230static long
3231ppc64_elf_get_synthetic_symtab (bfd *abfd,
3232 long static_count, asymbol **static_syms,
3233 long dyn_count, asymbol **dyn_syms,
3234 asymbol **ret)
3235{
3236 asymbol *s;
3237 long i;
3238 long count;
3239 char *names;
3240 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3241 asection *opd = NULL;
3242 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3243 asymbol **syms;
3244 int abi = abiversion (abfd);
3245
3246 *ret = NULL;
3247
3248 if (abi < 2)
3249 {
3250 opd = bfd_get_section_by_name (abfd, ".opd");
3251 if (opd == NULL && abi == 1)
3252 return 0;
3253 }
3254
3255 symcount = static_count;
3256 if (!relocatable)
3257 symcount += dyn_count;
3258 if (symcount == 0)
3259 return 0;
3260
3261 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3262 if (syms == NULL)
3263 return -1;
3264
3265 if (!relocatable && static_count != 0 && dyn_count != 0)
3266 {
3267 /* Use both symbol tables. */
3268 memcpy (syms, static_syms, static_count * sizeof (*syms));
3269 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3270 }
3271 else if (!relocatable && static_count == 0)
3272 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3273 else
3274 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3275
3276 synthetic_relocatable = relocatable;
3277 synthetic_opd = opd;
3278 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3279
3280 if (!relocatable && symcount > 1)
3281 {
3282 long j;
3283 /* Trim duplicate syms, since we may have merged the normal and
3284 dynamic symbols. Actually, we only care about syms that have
3285 different values, so trim any with the same value. */
3286 for (i = 1, j = 1; i < symcount; ++i)
3287 if (syms[i - 1]->value + syms[i - 1]->section->vma
3288 != syms[i]->value + syms[i]->section->vma)
3289 syms[j++] = syms[i];
3290 symcount = j;
3291 }
3292
3293 i = 0;
3294 /* Note that here and in compare_symbols we can't compare opd and
3295 sym->section directly. With separate debug info files, the
3296 symbols will be extracted from the debug file while abfd passed
3297 to this function is the real binary. */
3298 if (opd != NULL && strcmp (syms[i]->section->name, ".opd") == 0)
3299 ++i;
3300 codesecsym = i;
3301
3302 for (; i < symcount; ++i)
3303 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3304 != (SEC_CODE | SEC_ALLOC))
3305 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3306 break;
3307 codesecsymend = i;
3308
3309 for (; i < symcount; ++i)
3310 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3311 break;
3312 secsymend = i;
3313
3314 if (opd != NULL)
3315 for (; i < symcount; ++i)
3316 if (strcmp (syms[i]->section->name, ".opd") != 0)
3317 break;
3318 opdsymend = i;
3319
3320 for (; i < symcount; ++i)
3321 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3322 != (SEC_CODE | SEC_ALLOC))
3323 break;
3324 symcount = i;
3325
3326 count = 0;
3327
3328 if (relocatable)
3329 {
3330 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3331 arelent *r;
3332 size_t size;
3333 long relcount;
3334
3335 if (opdsymend == secsymend)
3336 goto done;
3337
3338 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3339 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3340 if (relcount == 0)
3341 goto done;
3342
3343 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3344 {
3345 count = -1;
3346 goto done;
3347 }
3348
3349 size = 0;
3350 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3351 {
3352 asymbol *sym;
3353
3354 while (r < opd->relocation + relcount
3355 && r->address < syms[i]->value + opd->vma)
3356 ++r;
3357
3358 if (r == opd->relocation + relcount)
3359 break;
3360
3361 if (r->address != syms[i]->value + opd->vma)
3362 continue;
3363
3364 if (r->howto->type != R_PPC64_ADDR64)
3365 continue;
3366
3367 sym = *r->sym_ptr_ptr;
3368 if (!sym_exists_at (syms, opdsymend, symcount,
3369 sym->section->id, sym->value + r->addend))
3370 {
3371 ++count;
3372 size += sizeof (asymbol);
3373 size += strlen (syms[i]->name) + 2;
3374 }
3375 }
3376
3377 if (size == 0)
3378 goto done;
3379 s = *ret = bfd_malloc (size);
3380 if (s == NULL)
3381 {
3382 count = -1;
3383 goto done;
3384 }
3385
3386 names = (char *) (s + count);
3387
3388 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3389 {
3390 asymbol *sym;
3391
3392 while (r < opd->relocation + relcount
3393 && r->address < syms[i]->value + opd->vma)
3394 ++r;
3395
3396 if (r == opd->relocation + relcount)
3397 break;
3398
3399 if (r->address != syms[i]->value + opd->vma)
3400 continue;
3401
3402 if (r->howto->type != R_PPC64_ADDR64)
3403 continue;
3404
3405 sym = *r->sym_ptr_ptr;
3406 if (!sym_exists_at (syms, opdsymend, symcount,
3407 sym->section->id, sym->value + r->addend))
3408 {
3409 size_t len;
3410
3411 *s = *syms[i];
3412 s->flags |= BSF_SYNTHETIC;
3413 s->section = sym->section;
3414 s->value = sym->value + r->addend;
3415 s->name = names;
3416 *names++ = '.';
3417 len = strlen (syms[i]->name);
3418 memcpy (names, syms[i]->name, len + 1);
3419 names += len + 1;
3420 /* Have udata.p point back to the original symbol this
3421 synthetic symbol was derived from. */
3422 s->udata.p = syms[i];
3423 s++;
3424 }
3425 }
3426 }
3427 else
3428 {
3429 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3430 bfd_byte *contents = NULL;
3431 size_t size;
3432 long plt_count = 0;
3433 bfd_vma glink_vma = 0, resolv_vma = 0;
3434 asection *dynamic, *glink = NULL, *relplt = NULL;
3435 arelent *p;
3436
3437 if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents))
3438 {
3439 free_contents_and_exit_err:
3440 count = -1;
3441 free_contents_and_exit:
3442 if (contents)
3443 free (contents);
3444 goto done;
3445 }
3446
3447 size = 0;
3448 for (i = secsymend; i < opdsymend; ++i)
3449 {
3450 bfd_vma ent;
3451
3452 /* Ignore bogus symbols. */
3453 if (syms[i]->value > opd->size - 8)
3454 continue;
3455
3456 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3457 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3458 {
3459 ++count;
3460 size += sizeof (asymbol);
3461 size += strlen (syms[i]->name) + 2;
3462 }
3463 }
3464
3465 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3466 if (dyn_count != 0
3467 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3468 {
3469 bfd_byte *dynbuf, *extdyn, *extdynend;
3470 size_t extdynsize;
3471 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3472
3473 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3474 goto free_contents_and_exit_err;
3475
3476 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3477 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3478
3479 extdyn = dynbuf;
3480 extdynend = extdyn + dynamic->size;
3481 for (; extdyn < extdynend; extdyn += extdynsize)
3482 {
3483 Elf_Internal_Dyn dyn;
3484 (*swap_dyn_in) (abfd, extdyn, &dyn);
3485
3486 if (dyn.d_tag == DT_NULL)
3487 break;
3488
3489 if (dyn.d_tag == DT_PPC64_GLINK)
3490 {
3491 /* The first glink stub starts at offset 32; see
3492 comment in ppc64_elf_finish_dynamic_sections. */
3493 glink_vma = dyn.d_un.d_val + GLINK_CALL_STUB_SIZE - 8 * 4;
3494 /* The .glink section usually does not survive the final
3495 link; search for the section (usually .text) where the
3496 glink stubs now reside. */
3497 glink = bfd_sections_find_if (abfd, section_covers_vma,
3498 &glink_vma);
3499 break;
3500 }
3501 }
3502
3503 free (dynbuf);
3504 }
3505
3506 if (glink != NULL)
3507 {
3508 /* Determine __glink trampoline by reading the relative branch
3509 from the first glink stub. */
3510 bfd_byte buf[4];
3511 unsigned int off = 0;
3512
3513 while (bfd_get_section_contents (abfd, glink, buf,
3514 glink_vma + off - glink->vma, 4))
3515 {
3516 unsigned int insn = bfd_get_32 (abfd, buf);
3517 insn ^= B_DOT;
3518 if ((insn & ~0x3fffffc) == 0)
3519 {
3520 resolv_vma = glink_vma + off + (insn ^ 0x2000000) - 0x2000000;
3521 break;
3522 }
3523 off += 4;
3524 if (off > 4)
3525 break;
3526 }
3527
3528 if (resolv_vma)
3529 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3530
3531 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3532 if (relplt != NULL)
3533 {
3534 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3535 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3536 goto free_contents_and_exit_err;
3537
3538 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3539 size += plt_count * sizeof (asymbol);
3540
3541 p = relplt->relocation;
3542 for (i = 0; i < plt_count; i++, p++)
3543 {
3544 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3545 if (p->addend != 0)
3546 size += sizeof ("+0x") - 1 + 16;
3547 }
3548 }
3549 }
3550
3551 if (size == 0)
3552 goto free_contents_and_exit;
3553 s = *ret = bfd_malloc (size);
3554 if (s == NULL)
3555 goto free_contents_and_exit_err;
3556
3557 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3558
3559 for (i = secsymend; i < opdsymend; ++i)
3560 {
3561 bfd_vma ent;
3562
3563 if (syms[i]->value > opd->size - 8)
3564 continue;
3565
3566 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3567 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3568 {
3569 long lo, hi;
3570 size_t len;
3571 asection *sec = abfd->sections;
3572
3573 *s = *syms[i];
3574 lo = codesecsym;
3575 hi = codesecsymend;
3576 while (lo < hi)
3577 {
3578 long mid = (lo + hi) >> 1;
3579 if (syms[mid]->section->vma < ent)
3580 lo = mid + 1;
3581 else if (syms[mid]->section->vma > ent)
3582 hi = mid;
3583 else
3584 {
3585 sec = syms[mid]->section;
3586 break;
3587 }
3588 }
3589
3590 if (lo >= hi && lo > codesecsym)
3591 sec = syms[lo - 1]->section;
3592
3593 for (; sec != NULL; sec = sec->next)
3594 {
3595 if (sec->vma > ent)
3596 break;
3597 /* SEC_LOAD may not be set if SEC is from a separate debug
3598 info file. */
3599 if ((sec->flags & SEC_ALLOC) == 0)
3600 break;
3601 if ((sec->flags & SEC_CODE) != 0)
3602 s->section = sec;
3603 }
3604 s->flags |= BSF_SYNTHETIC;
3605 s->value = ent - s->section->vma;
3606 s->name = names;
3607 *names++ = '.';
3608 len = strlen (syms[i]->name);
3609 memcpy (names, syms[i]->name, len + 1);
3610 names += len + 1;
3611 /* Have udata.p point back to the original symbol this
3612 synthetic symbol was derived from. */
3613 s->udata.p = syms[i];
3614 s++;
3615 }
3616 }
3617 free (contents);
3618
3619 if (glink != NULL && relplt != NULL)
3620 {
3621 if (resolv_vma)
3622 {
3623 /* Add a symbol for the main glink trampoline. */
3624 memset (s, 0, sizeof *s);
3625 s->the_bfd = abfd;
3626 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3627 s->section = glink;
3628 s->value = resolv_vma - glink->vma;
3629 s->name = names;
3630 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3631 names += sizeof ("__glink_PLTresolve");
3632 s++;
3633 count++;
3634 }
3635
3636 /* FIXME: It would be very much nicer to put sym@plt on the
3637 stub rather than on the glink branch table entry. The
3638 objdump disassembler would then use a sensible symbol
3639 name on plt calls. The difficulty in doing so is
3640 a) finding the stubs, and,
3641 b) matching stubs against plt entries, and,
3642 c) there can be multiple stubs for a given plt entry.
3643
3644 Solving (a) could be done by code scanning, but older
3645 ppc64 binaries used different stubs to current code.
3646 (b) is the tricky one since you need to known the toc
3647 pointer for at least one function that uses a pic stub to
3648 be able to calculate the plt address referenced.
3649 (c) means gdb would need to set multiple breakpoints (or
3650 find the glink branch itself) when setting breakpoints
3651 for pending shared library loads. */
3652 p = relplt->relocation;
3653 for (i = 0; i < plt_count; i++, p++)
3654 {
3655 size_t len;
3656
3657 *s = **p->sym_ptr_ptr;
3658 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3659 we are defining a symbol, ensure one of them is set. */
3660 if ((s->flags & BSF_LOCAL) == 0)
3661 s->flags |= BSF_GLOBAL;
3662 s->flags |= BSF_SYNTHETIC;
3663 s->section = glink;
3664 s->value = glink_vma - glink->vma;
3665 s->name = names;
3666 s->udata.p = NULL;
3667 len = strlen ((*p->sym_ptr_ptr)->name);
3668 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3669 names += len;
3670 if (p->addend != 0)
3671 {
3672 memcpy (names, "+0x", sizeof ("+0x") - 1);
3673 names += sizeof ("+0x") - 1;
3674 bfd_sprintf_vma (abfd, names, p->addend);
3675 names += strlen (names);
3676 }
3677 memcpy (names, "@plt", sizeof ("@plt"));
3678 names += sizeof ("@plt");
3679 s++;
3680 if (abi < 2)
3681 {
3682 glink_vma += 8;
3683 if (i >= 0x8000)
3684 glink_vma += 4;
3685 }
3686 else
3687 glink_vma += 4;
3688 }
3689 count += plt_count;
3690 }
3691 }
3692
3693 done:
3694 free (syms);
3695 return count;
3696}
3697\f
3698/* The following functions are specific to the ELF linker, while
3699 functions above are used generally. Those named ppc64_elf_* are
3700 called by the main ELF linker code. They appear in this file more
3701 or less in the order in which they are called. eg.
3702 ppc64_elf_check_relocs is called early in the link process,
3703 ppc64_elf_finish_dynamic_sections is one of the last functions
3704 called.
3705
3706 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3707 functions have both a function code symbol and a function descriptor
3708 symbol. A call to foo in a relocatable object file looks like:
3709
3710 . .text
3711 . x:
3712 . bl .foo
3713 . nop
3714
3715 The function definition in another object file might be:
3716
3717 . .section .opd
3718 . foo: .quad .foo
3719 . .quad .TOC.@tocbase
3720 . .quad 0
3721 .
3722 . .text
3723 . .foo: blr
3724
3725 When the linker resolves the call during a static link, the branch
3726 unsurprisingly just goes to .foo and the .opd information is unused.
3727 If the function definition is in a shared library, things are a little
3728 different: The call goes via a plt call stub, the opd information gets
3729 copied to the plt, and the linker patches the nop.
3730
3731 . x:
3732 . bl .foo_stub
3733 . ld 2,40(1)
3734 .
3735 .
3736 . .foo_stub:
3737 . std 2,40(1) # in practice, the call stub
3738 . addis 11,2,Lfoo@toc@ha # is slightly optimized, but
3739 . addi 11,11,Lfoo@toc@l # this is the general idea
3740 . ld 12,0(11)
3741 . ld 2,8(11)
3742 . mtctr 12
3743 . ld 11,16(11)
3744 . bctr
3745 .
3746 . .section .plt
3747 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3748
3749 The "reloc ()" notation is supposed to indicate that the linker emits
3750 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3751 copying.
3752
3753 What are the difficulties here? Well, firstly, the relocations
3754 examined by the linker in check_relocs are against the function code
3755 sym .foo, while the dynamic relocation in the plt is emitted against
3756 the function descriptor symbol, foo. Somewhere along the line, we need
3757 to carefully copy dynamic link information from one symbol to the other.
3758 Secondly, the generic part of the elf linker will make .foo a dynamic
3759 symbol as is normal for most other backends. We need foo dynamic
3760 instead, at least for an application final link. However, when
3761 creating a shared library containing foo, we need to have both symbols
3762 dynamic so that references to .foo are satisfied during the early
3763 stages of linking. Otherwise the linker might decide to pull in a
3764 definition from some other object, eg. a static library.
3765
3766 Update: As of August 2004, we support a new convention. Function
3767 calls may use the function descriptor symbol, ie. "bl foo". This
3768 behaves exactly as "bl .foo". */
3769
3770/* Of those relocs that might be copied as dynamic relocs, this function
3771 selects those that must be copied when linking a shared library,
3772 even when the symbol is local. */
3773
3774static int
3775must_be_dyn_reloc (struct bfd_link_info *info,
3776 enum elf_ppc64_reloc_type r_type)
3777{
3778 switch (r_type)
3779 {
3780 default:
3781 return 1;
3782
3783 case R_PPC64_REL32:
3784 case R_PPC64_REL64:
3785 case R_PPC64_REL30:
3786 return 0;
3787
3788 case R_PPC64_TPREL16:
3789 case R_PPC64_TPREL16_LO:
3790 case R_PPC64_TPREL16_HI:
3791 case R_PPC64_TPREL16_HA:
3792 case R_PPC64_TPREL16_DS:
3793 case R_PPC64_TPREL16_LO_DS:
3794 case R_PPC64_TPREL16_HIGH:
3795 case R_PPC64_TPREL16_HIGHA:
3796 case R_PPC64_TPREL16_HIGHER:
3797 case R_PPC64_TPREL16_HIGHERA:
3798 case R_PPC64_TPREL16_HIGHEST:
3799 case R_PPC64_TPREL16_HIGHESTA:
3800 case R_PPC64_TPREL64:
3801 return !bfd_link_executable (info);
3802 }
3803}
3804
3805/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3806 copying dynamic variables from a shared lib into an app's dynbss
3807 section, and instead use a dynamic relocation to point into the
3808 shared lib. With code that gcc generates, it's vital that this be
3809 enabled; In the PowerPC64 ABI, the address of a function is actually
3810 the address of a function descriptor, which resides in the .opd
3811 section. gcc uses the descriptor directly rather than going via the
3812 GOT as some other ABI's do, which means that initialized function
3813 pointers must reference the descriptor. Thus, a function pointer
3814 initialized to the address of a function in a shared library will
3815 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3816 redefines the function descriptor symbol to point to the copy. This
3817 presents a problem as a plt entry for that function is also
3818 initialized from the function descriptor symbol and the copy reloc
3819 may not be initialized first. */
3820#define ELIMINATE_COPY_RELOCS 1
3821
3822/* Section name for stubs is the associated section name plus this
3823 string. */
3824#define STUB_SUFFIX ".stub"
3825
3826/* Linker stubs.
3827 ppc_stub_long_branch:
3828 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3829 destination, but a 24 bit branch in a stub section will reach.
3830 . b dest
3831
3832 ppc_stub_plt_branch:
3833 Similar to the above, but a 24 bit branch in the stub section won't
3834 reach its destination.
3835 . addis %r11,%r2,xxx@toc@ha
3836 . ld %r12,xxx@toc@l(%r11)
3837 . mtctr %r12
3838 . bctr
3839
3840 ppc_stub_plt_call:
3841 Used to call a function in a shared library. If it so happens that
3842 the plt entry referenced crosses a 64k boundary, then an extra
3843 "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr".
3844 . std %r2,40(%r1)
3845 . addis %r11,%r2,xxx@toc@ha
3846 . ld %r12,xxx+0@toc@l(%r11)
3847 . mtctr %r12
3848 . ld %r2,xxx+8@toc@l(%r11)
3849 . ld %r11,xxx+16@toc@l(%r11)
3850 . bctr
3851
3852 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3853 code to adjust the value and save r2 to support multiple toc sections.
3854 A ppc_stub_long_branch with an r2 offset looks like:
3855 . std %r2,40(%r1)
3856 . addis %r2,%r2,off@ha
3857 . addi %r2,%r2,off@l
3858 . b dest
3859
3860 A ppc_stub_plt_branch with an r2 offset looks like:
3861 . std %r2,40(%r1)
3862 . addis %r11,%r2,xxx@toc@ha
3863 . ld %r12,xxx@toc@l(%r11)
3864 . addis %r2,%r2,off@ha
3865 . addi %r2,%r2,off@l
3866 . mtctr %r12
3867 . bctr
3868
3869 In cases where the "addis" instruction would add zero, the "addis" is
3870 omitted and following instructions modified slightly in some cases.
3871*/
3872
3873enum ppc_stub_type {
3874 ppc_stub_none,
3875 ppc_stub_long_branch,
3876 ppc_stub_long_branch_r2off,
3877 ppc_stub_plt_branch,
3878 ppc_stub_plt_branch_r2off,
3879 ppc_stub_plt_call,
3880 ppc_stub_plt_call_r2save,
3881 ppc_stub_global_entry,
3882 ppc_stub_save_res
3883};
3884
3885/* Information on stub grouping. */
3886struct map_stub
3887{
3888 /* The stub section. */
3889 asection *stub_sec;
3890 /* This is the section to which stubs in the group will be attached. */
3891 asection *link_sec;
3892 /* Next group. */
3893 struct map_stub *next;
3894 /* Whether to emit a copy of register save/restore functions in this
3895 group. */
3896 int needs_save_res;
3897};
3898
3899struct ppc_stub_hash_entry {
3900
3901 /* Base hash table entry structure. */
3902 struct bfd_hash_entry root;
3903
3904 enum ppc_stub_type stub_type;
3905
3906 /* Group information. */
3907 struct map_stub *group;
3908
3909 /* Offset within stub_sec of the beginning of this stub. */
3910 bfd_vma stub_offset;
3911
3912 /* Given the symbol's value and its section we can determine its final
3913 value when building the stubs (so the stub knows where to jump. */
3914 bfd_vma target_value;
3915 asection *target_section;
3916
3917 /* The symbol table entry, if any, that this was derived from. */
3918 struct ppc_link_hash_entry *h;
3919 struct plt_entry *plt_ent;
3920
3921 /* Symbol st_other. */
3922 unsigned char other;
3923};
3924
3925struct ppc_branch_hash_entry {
3926
3927 /* Base hash table entry structure. */
3928 struct bfd_hash_entry root;
3929
3930 /* Offset within branch lookup table. */
3931 unsigned int offset;
3932
3933 /* Generation marker. */
3934 unsigned int iter;
3935};
3936
3937/* Used to track dynamic relocations for local symbols. */
3938struct ppc_dyn_relocs
3939{
3940 struct ppc_dyn_relocs *next;
3941
3942 /* The input section of the reloc. */
3943 asection *sec;
3944
3945 /* Total number of relocs copied for the input section. */
3946 unsigned int count : 31;
3947
3948 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3949 unsigned int ifunc : 1;
3950};
3951
3952struct ppc_link_hash_entry
3953{
3954 struct elf_link_hash_entry elf;
3955
3956 union {
3957 /* A pointer to the most recently used stub hash entry against this
3958 symbol. */
3959 struct ppc_stub_hash_entry *stub_cache;
3960
3961 /* A pointer to the next symbol starting with a '.' */
3962 struct ppc_link_hash_entry *next_dot_sym;
3963 } u;
3964
3965 /* Track dynamic relocs copied for this symbol. */
3966 struct elf_dyn_relocs *dyn_relocs;
3967
3968 /* Chain of aliases referring to a weakdef. */
3969 struct ppc_link_hash_entry *weakref;
3970
3971 /* Link between function code and descriptor symbols. */
3972 struct ppc_link_hash_entry *oh;
3973
3974 /* Flag function code and descriptor symbols. */
3975 unsigned int is_func:1;
3976 unsigned int is_func_descriptor:1;
3977 unsigned int fake:1;
3978
3979 /* Whether global opd/toc sym has been adjusted or not.
3980 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3981 should be set for all globals defined in any opd/toc section. */
3982 unsigned int adjust_done:1;
3983
3984 /* Set if this is an out-of-line register save/restore function,
3985 with non-standard calling convention. */
3986 unsigned int save_res:1;
3987
3988 /* Contexts in which symbol is used in the GOT (or TOC).
3989 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3990 corresponding relocs are encountered during check_relocs.
3991 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3992 indicate the corresponding GOT entry type is not needed.
3993 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3994 a TPREL one. We use a separate flag rather than setting TPREL
3995 just for convenience in distinguishing the two cases. */
3996#define TLS_GD 1 /* GD reloc. */
3997#define TLS_LD 2 /* LD reloc. */
3998#define TLS_TPREL 4 /* TPREL reloc, => IE. */
3999#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
4000#define TLS_TLS 16 /* Any TLS reloc. */
4001#define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
4002#define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
4003#define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
4004 unsigned char tls_mask;
4005};
4006
4007/* ppc64 ELF linker hash table. */
4008
4009struct ppc_link_hash_table
4010{
4011 struct elf_link_hash_table elf;
4012
4013 /* The stub hash table. */
4014 struct bfd_hash_table stub_hash_table;
4015
4016 /* Another hash table for plt_branch stubs. */
4017 struct bfd_hash_table branch_hash_table;
4018
4019 /* Hash table for function prologue tocsave. */
4020 htab_t tocsave_htab;
4021
4022 /* Various options and other info passed from the linker. */
4023 struct ppc64_elf_params *params;
4024
4025 /* The size of sec_info below. */
4026 unsigned int sec_info_arr_size;
4027
4028 /* Per-section array of extra section info. Done this way rather
4029 than as part of ppc64_elf_section_data so we have the info for
4030 non-ppc64 sections. */
4031 struct
4032 {
4033 /* Along with elf_gp, specifies the TOC pointer used by this section. */
4034 bfd_vma toc_off;
4035
4036 union
4037 {
4038 /* The section group that this section belongs to. */
4039 struct map_stub *group;
4040 /* A temp section list pointer. */
4041 asection *list;
4042 } u;
4043 } *sec_info;
4044
4045 /* Linked list of groups. */
4046 struct map_stub *group;
4047
4048 /* Temp used when calculating TOC pointers. */
4049 bfd_vma toc_curr;
4050 bfd *toc_bfd;
4051 asection *toc_first_sec;
4052
4053 /* Used when adding symbols. */
4054 struct ppc_link_hash_entry *dot_syms;
4055
4056 /* Shortcuts to get to dynamic linker sections. */
4057 asection *glink;
4058 asection *sfpr;
4059 asection *brlt;
4060 asection *relbrlt;
4061 asection *glink_eh_frame;
4062
4063 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
4064 struct ppc_link_hash_entry *tls_get_addr;
4065 struct ppc_link_hash_entry *tls_get_addr_fd;
4066
4067 /* The size of reliplt used by got entry relocs. */
4068 bfd_size_type got_reli_size;
4069
4070 /* Statistics. */
4071 unsigned long stub_count[ppc_stub_global_entry];
4072
4073 /* Number of stubs against global syms. */
4074 unsigned long stub_globals;
4075
4076 /* Set if we're linking code with function descriptors. */
4077 unsigned int opd_abi:1;
4078
4079 /* Support for multiple toc sections. */
4080 unsigned int do_multi_toc:1;
4081 unsigned int multi_toc_needed:1;
4082 unsigned int second_toc_pass:1;
4083 unsigned int do_toc_opt:1;
4084
4085 /* Set on error. */
4086 unsigned int stub_error:1;
4087
4088 /* Whether func_desc_adjust needs to be run over symbols. */
4089 unsigned int need_func_desc_adj:1;
4090
4091 /* Incremented every time we size stubs. */
4092 unsigned int stub_iteration;
4093
4094 /* Small local sym cache. */
4095 struct sym_cache sym_cache;
4096};
4097
4098/* Rename some of the generic section flags to better document how they
4099 are used here. */
4100
4101/* Nonzero if this section has TLS related relocations. */
4102#define has_tls_reloc sec_flg0
4103
4104/* Nonzero if this section has a call to __tls_get_addr. */
4105#define has_tls_get_addr_call sec_flg1
4106
4107/* Nonzero if this section has any toc or got relocs. */
4108#define has_toc_reloc sec_flg2
4109
4110/* Nonzero if this section has a call to another section that uses
4111 the toc or got. */
4112#define makes_toc_func_call sec_flg3
4113
4114/* Recursion protection when determining above flag. */
4115#define call_check_in_progress sec_flg4
4116#define call_check_done sec_flg5
4117
4118/* Get the ppc64 ELF linker hash table from a link_info structure. */
4119
4120#define ppc_hash_table(p) \
4121 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
4122 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
4123
4124#define ppc_stub_hash_lookup(table, string, create, copy) \
4125 ((struct ppc_stub_hash_entry *) \
4126 bfd_hash_lookup ((table), (string), (create), (copy)))
4127
4128#define ppc_branch_hash_lookup(table, string, create, copy) \
4129 ((struct ppc_branch_hash_entry *) \
4130 bfd_hash_lookup ((table), (string), (create), (copy)))
4131
4132/* Create an entry in the stub hash table. */
4133
4134static struct bfd_hash_entry *
4135stub_hash_newfunc (struct bfd_hash_entry *entry,
4136 struct bfd_hash_table *table,
4137 const char *string)
4138{
4139 /* Allocate the structure if it has not already been allocated by a
4140 subclass. */
4141 if (entry == NULL)
4142 {
4143 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
4144 if (entry == NULL)
4145 return entry;
4146 }
4147
4148 /* Call the allocation method of the superclass. */
4149 entry = bfd_hash_newfunc (entry, table, string);
4150 if (entry != NULL)
4151 {
4152 struct ppc_stub_hash_entry *eh;
4153
4154 /* Initialize the local fields. */
4155 eh = (struct ppc_stub_hash_entry *) entry;
4156 eh->stub_type = ppc_stub_none;
4157 eh->group = NULL;
4158 eh->stub_offset = 0;
4159 eh->target_value = 0;
4160 eh->target_section = NULL;
4161 eh->h = NULL;
4162 eh->plt_ent = NULL;
4163 eh->other = 0;
4164 }
4165
4166 return entry;
4167}
4168
4169/* Create an entry in the branch hash table. */
4170
4171static struct bfd_hash_entry *
4172branch_hash_newfunc (struct bfd_hash_entry *entry,
4173 struct bfd_hash_table *table,
4174 const char *string)
4175{
4176 /* Allocate the structure if it has not already been allocated by a
4177 subclass. */
4178 if (entry == NULL)
4179 {
4180 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4181 if (entry == NULL)
4182 return entry;
4183 }
4184
4185 /* Call the allocation method of the superclass. */
4186 entry = bfd_hash_newfunc (entry, table, string);
4187 if (entry != NULL)
4188 {
4189 struct ppc_branch_hash_entry *eh;
4190
4191 /* Initialize the local fields. */
4192 eh = (struct ppc_branch_hash_entry *) entry;
4193 eh->offset = 0;
4194 eh->iter = 0;
4195 }
4196
4197 return entry;
4198}
4199
4200/* Create an entry in a ppc64 ELF linker hash table. */
4201
4202static struct bfd_hash_entry *
4203link_hash_newfunc (struct bfd_hash_entry *entry,
4204 struct bfd_hash_table *table,
4205 const char *string)
4206{
4207 /* Allocate the structure if it has not already been allocated by a
4208 subclass. */
4209 if (entry == NULL)
4210 {
4211 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4212 if (entry == NULL)
4213 return entry;
4214 }
4215
4216 /* Call the allocation method of the superclass. */
4217 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4218 if (entry != NULL)
4219 {
4220 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4221
4222 memset (&eh->u.stub_cache, 0,
4223 (sizeof (struct ppc_link_hash_entry)
4224 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4225
4226 /* When making function calls, old ABI code references function entry
4227 points (dot symbols), while new ABI code references the function
4228 descriptor symbol. We need to make any combination of reference and
4229 definition work together, without breaking archive linking.
4230
4231 For a defined function "foo" and an undefined call to "bar":
4232 An old object defines "foo" and ".foo", references ".bar" (possibly
4233 "bar" too).
4234 A new object defines "foo" and references "bar".
4235
4236 A new object thus has no problem with its undefined symbols being
4237 satisfied by definitions in an old object. On the other hand, the
4238 old object won't have ".bar" satisfied by a new object.
4239
4240 Keep a list of newly added dot-symbols. */
4241
4242 if (string[0] == '.')
4243 {
4244 struct ppc_link_hash_table *htab;
4245
4246 htab = (struct ppc_link_hash_table *) table;
4247 eh->u.next_dot_sym = htab->dot_syms;
4248 htab->dot_syms = eh;
4249 }
4250 }
4251
4252 return entry;
4253}
4254
4255struct tocsave_entry {
4256 asection *sec;
4257 bfd_vma offset;
4258};
4259
4260static hashval_t
4261tocsave_htab_hash (const void *p)
4262{
4263 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4264 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4265}
4266
4267static int
4268tocsave_htab_eq (const void *p1, const void *p2)
4269{
4270 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4271 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4272 return e1->sec == e2->sec && e1->offset == e2->offset;
4273}
4274
4275/* Destroy a ppc64 ELF linker hash table. */
4276
4277static void
4278ppc64_elf_link_hash_table_free (bfd *obfd)
4279{
4280 struct ppc_link_hash_table *htab;
4281
4282 htab = (struct ppc_link_hash_table *) obfd->link.hash;
4283 if (htab->tocsave_htab)
4284 htab_delete (htab->tocsave_htab);
4285 bfd_hash_table_free (&htab->branch_hash_table);
4286 bfd_hash_table_free (&htab->stub_hash_table);
4287 _bfd_elf_link_hash_table_free (obfd);
4288}
4289
4290/* Create a ppc64 ELF linker hash table. */
4291
4292static struct bfd_link_hash_table *
4293ppc64_elf_link_hash_table_create (bfd *abfd)
4294{
4295 struct ppc_link_hash_table *htab;
4296 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4297
4298 htab = bfd_zmalloc (amt);
4299 if (htab == NULL)
4300 return NULL;
4301
4302 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4303 sizeof (struct ppc_link_hash_entry),
4304 PPC64_ELF_DATA))
4305 {
4306 free (htab);
4307 return NULL;
4308 }
4309
4310 /* Init the stub hash table too. */
4311 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4312 sizeof (struct ppc_stub_hash_entry)))
4313 {
4314 _bfd_elf_link_hash_table_free (abfd);
4315 return NULL;
4316 }
4317
4318 /* And the branch hash table. */
4319 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4320 sizeof (struct ppc_branch_hash_entry)))
4321 {
4322 bfd_hash_table_free (&htab->stub_hash_table);
4323 _bfd_elf_link_hash_table_free (abfd);
4324 return NULL;
4325 }
4326
4327 htab->tocsave_htab = htab_try_create (1024,
4328 tocsave_htab_hash,
4329 tocsave_htab_eq,
4330 NULL);
4331 if (htab->tocsave_htab == NULL)
4332 {
4333 ppc64_elf_link_hash_table_free (abfd);
4334 return NULL;
4335 }
4336 htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free;
4337
4338 /* Initializing two fields of the union is just cosmetic. We really
4339 only care about glist, but when compiled on a 32-bit host the
4340 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4341 debugger inspection of these fields look nicer. */
4342 htab->elf.init_got_refcount.refcount = 0;
4343 htab->elf.init_got_refcount.glist = NULL;
4344 htab->elf.init_plt_refcount.refcount = 0;
4345 htab->elf.init_plt_refcount.glist = NULL;
4346 htab->elf.init_got_offset.offset = 0;
4347 htab->elf.init_got_offset.glist = NULL;
4348 htab->elf.init_plt_offset.offset = 0;
4349 htab->elf.init_plt_offset.glist = NULL;
4350
4351 return &htab->elf.root;
4352}
4353
4354/* Create sections for linker generated code. */
4355
4356static bfd_boolean
4357create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4358{
4359 struct ppc_link_hash_table *htab;
4360 flagword flags;
4361
4362 htab = ppc_hash_table (info);
4363
4364 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4365 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4366 if (htab->params->save_restore_funcs)
4367 {
4368 /* Create .sfpr for code to save and restore fp regs. */
4369 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4370 flags);
4371 if (htab->sfpr == NULL
4372 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4373 return FALSE;
4374 }
4375
4376 if (bfd_link_relocatable (info))
4377 return TRUE;
4378
4379 /* Create .glink for lazy dynamic linking support. */
4380 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4381 flags);
4382 if (htab->glink == NULL
4383 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4384 return FALSE;
4385
4386 if (!info->no_ld_generated_unwind_info)
4387 {
4388 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4389 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4390 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4391 ".eh_frame",
4392 flags);
4393 if (htab->glink_eh_frame == NULL
4394 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4395 return FALSE;
4396 }
4397
4398 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4399 htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4400 if (htab->elf.iplt == NULL
4401 || ! bfd_set_section_alignment (dynobj, htab->elf.iplt, 3))
4402 return FALSE;
4403
4404 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4405 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4406 htab->elf.irelplt
4407 = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags);
4408 if (htab->elf.irelplt == NULL
4409 || ! bfd_set_section_alignment (dynobj, htab->elf.irelplt, 3))
4410 return FALSE;
4411
4412 /* Create branch lookup table for plt_branch stubs. */
4413 flags = (SEC_ALLOC | SEC_LOAD
4414 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4415 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4416 flags);
4417 if (htab->brlt == NULL
4418 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4419 return FALSE;
4420
4421 if (!bfd_link_pic (info))
4422 return TRUE;
4423
4424 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4425 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4426 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4427 ".rela.branch_lt",
4428 flags);
4429 if (htab->relbrlt == NULL
4430 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4431 return FALSE;
4432
4433 return TRUE;
4434}
4435
4436/* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4437
4438bfd_boolean
4439ppc64_elf_init_stub_bfd (struct bfd_link_info *info,
4440 struct ppc64_elf_params *params)
4441{
4442 struct ppc_link_hash_table *htab;
4443
4444 elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64;
4445
4446/* Always hook our dynamic sections into the first bfd, which is the
4447 linker created stub bfd. This ensures that the GOT header is at
4448 the start of the output TOC section. */
4449 htab = ppc_hash_table (info);
4450 htab->elf.dynobj = params->stub_bfd;
4451 htab->params = params;
4452
4453 return create_linkage_sections (htab->elf.dynobj, info);
4454}
4455
4456/* Build a name for an entry in the stub hash table. */
4457
4458static char *
4459ppc_stub_name (const asection *input_section,
4460 const asection *sym_sec,
4461 const struct ppc_link_hash_entry *h,
4462 const Elf_Internal_Rela *rel)
4463{
4464 char *stub_name;
4465 ssize_t len;
4466
4467 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4468 offsets from a sym as a branch target? In fact, we could
4469 probably assume the addend is always zero. */
4470 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4471
4472 if (h)
4473 {
4474 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4475 stub_name = bfd_malloc (len);
4476 if (stub_name == NULL)
4477 return stub_name;
4478
4479 len = sprintf (stub_name, "%08x.%s+%x",
4480 input_section->id & 0xffffffff,
4481 h->elf.root.root.string,
4482 (int) rel->r_addend & 0xffffffff);
4483 }
4484 else
4485 {
4486 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4487 stub_name = bfd_malloc (len);
4488 if (stub_name == NULL)
4489 return stub_name;
4490
4491 len = sprintf (stub_name, "%08x.%x:%x+%x",
4492 input_section->id & 0xffffffff,
4493 sym_sec->id & 0xffffffff,
4494 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4495 (int) rel->r_addend & 0xffffffff);
4496 }
4497 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4498 stub_name[len - 2] = 0;
4499 return stub_name;
4500}
4501
4502/* Look up an entry in the stub hash. Stub entries are cached because
4503 creating the stub name takes a bit of time. */
4504
4505static struct ppc_stub_hash_entry *
4506ppc_get_stub_entry (const asection *input_section,
4507 const asection *sym_sec,
4508 struct ppc_link_hash_entry *h,
4509 const Elf_Internal_Rela *rel,
4510 struct ppc_link_hash_table *htab)
4511{
4512 struct ppc_stub_hash_entry *stub_entry;
4513 struct map_stub *group;
4514
4515 /* If this input section is part of a group of sections sharing one
4516 stub section, then use the id of the first section in the group.
4517 Stub names need to include a section id, as there may well be
4518 more than one stub used to reach say, printf, and we need to
4519 distinguish between them. */
4520 group = htab->sec_info[input_section->id].u.group;
4521 if (group == NULL)
4522 return NULL;
4523
4524 if (h != NULL && h->u.stub_cache != NULL
4525 && h->u.stub_cache->h == h
4526 && h->u.stub_cache->group == group)
4527 {
4528 stub_entry = h->u.stub_cache;
4529 }
4530 else
4531 {
4532 char *stub_name;
4533
4534 stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel);
4535 if (stub_name == NULL)
4536 return NULL;
4537
4538 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4539 stub_name, FALSE, FALSE);
4540 if (h != NULL)
4541 h->u.stub_cache = stub_entry;
4542
4543 free (stub_name);
4544 }
4545
4546 return stub_entry;
4547}
4548
4549/* Add a new stub entry to the stub hash. Not all fields of the new
4550 stub entry are initialised. */
4551
4552static struct ppc_stub_hash_entry *
4553ppc_add_stub (const char *stub_name,
4554 asection *section,
4555 struct bfd_link_info *info)
4556{
4557 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4558 struct map_stub *group;
4559 asection *link_sec;
4560 asection *stub_sec;
4561 struct ppc_stub_hash_entry *stub_entry;
4562
4563 group = htab->sec_info[section->id].u.group;
4564 link_sec = group->link_sec;
4565 stub_sec = group->stub_sec;
4566 if (stub_sec == NULL)
4567 {
4568 size_t namelen;
4569 bfd_size_type len;
4570 char *s_name;
4571
4572 namelen = strlen (link_sec->name);
4573 len = namelen + sizeof (STUB_SUFFIX);
4574 s_name = bfd_alloc (htab->params->stub_bfd, len);
4575 if (s_name == NULL)
4576 return NULL;
4577
4578 memcpy (s_name, link_sec->name, namelen);
4579 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4580 stub_sec = (*htab->params->add_stub_section) (s_name, link_sec);
4581 if (stub_sec == NULL)
4582 return NULL;
4583 group->stub_sec = stub_sec;
4584 }
4585
4586 /* Enter this entry into the linker stub hash table. */
4587 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4588 TRUE, FALSE);
4589 if (stub_entry == NULL)
4590 {
4591 /* xgettext:c-format */
4592 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4593 section->owner, stub_name);
4594 return NULL;
4595 }
4596
4597 stub_entry->group = group;
4598 stub_entry->stub_offset = 0;
4599 return stub_entry;
4600}
4601
4602/* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4603 not already done. */
4604
4605static bfd_boolean
4606create_got_section (bfd *abfd, struct bfd_link_info *info)
4607{
4608 asection *got, *relgot;
4609 flagword flags;
4610 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4611
4612 if (!is_ppc64_elf (abfd))
4613 return FALSE;
4614 if (htab == NULL)
4615 return FALSE;
4616
4617 if (!htab->elf.sgot
4618 && !_bfd_elf_create_got_section (htab->elf.dynobj, info))
4619 return FALSE;
4620
4621 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4622 | SEC_LINKER_CREATED);
4623
4624 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4625 if (!got
4626 || !bfd_set_section_alignment (abfd, got, 3))
4627 return FALSE;
4628
4629 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4630 flags | SEC_READONLY);
4631 if (!relgot
4632 || ! bfd_set_section_alignment (abfd, relgot, 3))
4633 return FALSE;
4634
4635 ppc64_elf_tdata (abfd)->got = got;
4636 ppc64_elf_tdata (abfd)->relgot = relgot;
4637 return TRUE;
4638}
4639
4640/* Follow indirect and warning symbol links. */
4641
4642static inline struct bfd_link_hash_entry *
4643follow_link (struct bfd_link_hash_entry *h)
4644{
4645 while (h->type == bfd_link_hash_indirect
4646 || h->type == bfd_link_hash_warning)
4647 h = h->u.i.link;
4648 return h;
4649}
4650
4651static inline struct elf_link_hash_entry *
4652elf_follow_link (struct elf_link_hash_entry *h)
4653{
4654 return (struct elf_link_hash_entry *) follow_link (&h->root);
4655}
4656
4657static inline struct ppc_link_hash_entry *
4658ppc_follow_link (struct ppc_link_hash_entry *h)
4659{
4660 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4661}
4662
4663/* Merge PLT info on FROM with that on TO. */
4664
4665static void
4666move_plt_plist (struct ppc_link_hash_entry *from,
4667 struct ppc_link_hash_entry *to)
4668{
4669 if (from->elf.plt.plist != NULL)
4670 {
4671 if (to->elf.plt.plist != NULL)
4672 {
4673 struct plt_entry **entp;
4674 struct plt_entry *ent;
4675
4676 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4677 {
4678 struct plt_entry *dent;
4679
4680 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4681 if (dent->addend == ent->addend)
4682 {
4683 dent->plt.refcount += ent->plt.refcount;
4684 *entp = ent->next;
4685 break;
4686 }
4687 if (dent == NULL)
4688 entp = &ent->next;
4689 }
4690 *entp = to->elf.plt.plist;
4691 }
4692
4693 to->elf.plt.plist = from->elf.plt.plist;
4694 from->elf.plt.plist = NULL;
4695 }
4696}
4697
4698/* Copy the extra info we tack onto an elf_link_hash_entry. */
4699
4700static void
4701ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4702 struct elf_link_hash_entry *dir,
4703 struct elf_link_hash_entry *ind)
4704{
4705 struct ppc_link_hash_entry *edir, *eind;
4706
4707 edir = (struct ppc_link_hash_entry *) dir;
4708 eind = (struct ppc_link_hash_entry *) ind;
4709
4710 edir->is_func |= eind->is_func;
4711 edir->is_func_descriptor |= eind->is_func_descriptor;
4712 edir->tls_mask |= eind->tls_mask;
4713 if (eind->oh != NULL)
4714 edir->oh = ppc_follow_link (eind->oh);
4715
4716 /* If called to transfer flags for a weakdef during processing
4717 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4718 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4719 if (!(ELIMINATE_COPY_RELOCS
4720 && eind->elf.root.type != bfd_link_hash_indirect
4721 && edir->elf.dynamic_adjusted))
4722 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4723
4724 if (edir->elf.versioned != versioned_hidden)
4725 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4726 edir->elf.ref_regular |= eind->elf.ref_regular;
4727 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4728 edir->elf.needs_plt |= eind->elf.needs_plt;
4729 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
4730
4731 /* If we were called to copy over info for a weak sym, don't copy
4732 dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs
4733 in order to simplify readonly_dynrelocs and save a field in the
4734 symbol hash entry, but that means dyn_relocs can't be used in any
4735 tests about a specific symbol, or affect other symbol flags which
4736 are then tested.
4737 Chain weakdefs so we can get from the weakdef back to an alias.
4738 The list is circular so that we don't need to use u.weakdef as
4739 well as this list to look at all aliases. */
4740 if (eind->elf.root.type != bfd_link_hash_indirect)
4741 {
4742 struct ppc_link_hash_entry *cur, *add, *next;
4743
4744 add = eind;
4745 do
4746 {
4747 cur = edir->weakref;
4748 if (cur != NULL)
4749 {
4750 do
4751 {
4752 /* We can be called twice for the same symbols.
4753 Don't make multiple loops. */
4754 if (cur == add)
4755 return;
4756 cur = cur->weakref;
4757 } while (cur != edir);
4758 }
4759 next = add->weakref;
4760 if (cur != add)
4761 {
4762 add->weakref = edir->weakref != NULL ? edir->weakref : edir;
4763 edir->weakref = add;
4764 }
4765 add = next;
4766 } while (add != NULL && add != eind);
4767 return;
4768 }
4769
4770 /* Copy over any dynamic relocs we may have on the indirect sym. */
4771 if (eind->dyn_relocs != NULL)
4772 {
4773 if (edir->dyn_relocs != NULL)
4774 {
4775 struct elf_dyn_relocs **pp;
4776 struct elf_dyn_relocs *p;
4777
4778 /* Add reloc counts against the indirect sym to the direct sym
4779 list. Merge any entries against the same section. */
4780 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4781 {
4782 struct elf_dyn_relocs *q;
4783
4784 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4785 if (q->sec == p->sec)
4786 {
4787 q->pc_count += p->pc_count;
4788 q->count += p->count;
4789 *pp = p->next;
4790 break;
4791 }
4792 if (q == NULL)
4793 pp = &p->next;
4794 }
4795 *pp = edir->dyn_relocs;
4796 }
4797
4798 edir->dyn_relocs = eind->dyn_relocs;
4799 eind->dyn_relocs = NULL;
4800 }
4801
4802 /* Copy over got entries that we may have already seen to the
4803 symbol which just became indirect. */
4804 if (eind->elf.got.glist != NULL)
4805 {
4806 if (edir->elf.got.glist != NULL)
4807 {
4808 struct got_entry **entp;
4809 struct got_entry *ent;
4810
4811 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4812 {
4813 struct got_entry *dent;
4814
4815 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4816 if (dent->addend == ent->addend
4817 && dent->owner == ent->owner
4818 && dent->tls_type == ent->tls_type)
4819 {
4820 dent->got.refcount += ent->got.refcount;
4821 *entp = ent->next;
4822 break;
4823 }
4824 if (dent == NULL)
4825 entp = &ent->next;
4826 }
4827 *entp = edir->elf.got.glist;
4828 }
4829
4830 edir->elf.got.glist = eind->elf.got.glist;
4831 eind->elf.got.glist = NULL;
4832 }
4833
4834 /* And plt entries. */
4835 move_plt_plist (eind, edir);
4836
4837 if (eind->elf.dynindx != -1)
4838 {
4839 if (edir->elf.dynindx != -1)
4840 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4841 edir->elf.dynstr_index);
4842 edir->elf.dynindx = eind->elf.dynindx;
4843 edir->elf.dynstr_index = eind->elf.dynstr_index;
4844 eind->elf.dynindx = -1;
4845 eind->elf.dynstr_index = 0;
4846 }
4847}
4848
4849/* Find the function descriptor hash entry from the given function code
4850 hash entry FH. Link the entries via their OH fields. */
4851
4852static struct ppc_link_hash_entry *
4853lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4854{
4855 struct ppc_link_hash_entry *fdh = fh->oh;
4856
4857 if (fdh == NULL)
4858 {
4859 const char *fd_name = fh->elf.root.root.string + 1;
4860
4861 fdh = (struct ppc_link_hash_entry *)
4862 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4863 if (fdh == NULL)
4864 return fdh;
4865
4866 fdh->is_func_descriptor = 1;
4867 fdh->oh = fh;
4868 fh->is_func = 1;
4869 fh->oh = fdh;
4870 }
4871
4872 fdh = ppc_follow_link (fdh);
4873 fdh->is_func_descriptor = 1;
4874 fdh->oh = fh;
4875 return fdh;
4876}
4877
4878/* Make a fake function descriptor sym for the undefined code sym FH. */
4879
4880static struct ppc_link_hash_entry *
4881make_fdh (struct bfd_link_info *info,
4882 struct ppc_link_hash_entry *fh)
4883{
4884 bfd *abfd = fh->elf.root.u.undef.abfd;
4885 struct bfd_link_hash_entry *bh = NULL;
4886 struct ppc_link_hash_entry *fdh;
4887 flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak
4888 ? BSF_WEAK
4889 : BSF_GLOBAL);
4890
4891 if (!_bfd_generic_link_add_one_symbol (info, abfd,
4892 fh->elf.root.root.string + 1,
4893 flags, bfd_und_section_ptr, 0,
4894 NULL, FALSE, FALSE, &bh))
4895 return NULL;
4896
4897 fdh = (struct ppc_link_hash_entry *) bh;
4898 fdh->elf.non_elf = 0;
4899 fdh->fake = 1;
4900 fdh->is_func_descriptor = 1;
4901 fdh->oh = fh;
4902 fh->is_func = 1;
4903 fh->oh = fdh;
4904 return fdh;
4905}
4906
4907/* Fix function descriptor symbols defined in .opd sections to be
4908 function type. */
4909
4910static bfd_boolean
4911ppc64_elf_add_symbol_hook (bfd *ibfd,
4912 struct bfd_link_info *info,
4913 Elf_Internal_Sym *isym,
4914 const char **name,
4915 flagword *flags ATTRIBUTE_UNUSED,
4916 asection **sec,
4917 bfd_vma *value)
4918{
4919 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4920 && (ibfd->flags & DYNAMIC) == 0
4921 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
4922 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
4923
4924 if (*sec != NULL
4925 && strcmp ((*sec)->name, ".opd") == 0)
4926 {
4927 asection *code_sec;
4928
4929 if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
4930 || ELF_ST_TYPE (isym->st_info) == STT_FUNC))
4931 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4932
4933 /* If the symbol is a function defined in .opd, and the function
4934 code is in a discarded group, let it appear to be undefined. */
4935 if (!bfd_link_relocatable (info)
4936 && (*sec)->reloc_count != 0
4937 && opd_entry_value (*sec, *value, &code_sec, NULL,
4938 FALSE) != (bfd_vma) -1
4939 && discarded_section (code_sec))
4940 {
4941 *sec = bfd_und_section_ptr;
4942 isym->st_shndx = SHN_UNDEF;
4943 }
4944 }
4945 else if (*sec != NULL
4946 && strcmp ((*sec)->name, ".toc") == 0
4947 && ELF_ST_TYPE (isym->st_info) == STT_OBJECT)
4948 {
4949 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4950 if (htab != NULL)
4951 htab->params->object_in_toc = 1;
4952 }
4953
4954 if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0)
4955 {
4956 if (abiversion (ibfd) == 0)
4957 set_abiversion (ibfd, 2);
4958 else if (abiversion (ibfd) == 1)
4959 {
4960 info->callbacks->einfo (_("%P: symbol '%s' has invalid st_other"
4961 " for ABI version 1\n"), name);
4962 bfd_set_error (bfd_error_bad_value);
4963 return FALSE;
4964 }
4965 }
4966
4967 return TRUE;
4968}
4969
4970/* Merge non-visibility st_other attributes: local entry point. */
4971
4972static void
4973ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h,
4974 const Elf_Internal_Sym *isym,
4975 bfd_boolean definition,
4976 bfd_boolean dynamic)
4977{
4978 if (definition && !dynamic)
4979 h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
4980 | ELF_ST_VISIBILITY (h->other));
4981}
4982
4983/* Hook called on merging a symbol. We use this to clear "fake" since
4984 we now have a real symbol. */
4985
4986static bfd_boolean
4987ppc64_elf_merge_symbol (struct elf_link_hash_entry *h,
4988 const Elf_Internal_Sym *isym ATTRIBUTE_UNUSED,
4989 asection **psec ATTRIBUTE_UNUSED,
4990 bfd_boolean newdef ATTRIBUTE_UNUSED,
4991 bfd_boolean olddef ATTRIBUTE_UNUSED,
4992 bfd *oldbfd ATTRIBUTE_UNUSED,
4993 const asection *oldsec ATTRIBUTE_UNUSED)
4994{
4995 ((struct ppc_link_hash_entry *) h)->fake = 0;
4996 return TRUE;
4997}
4998
4999/* This function makes an old ABI object reference to ".bar" cause the
5000 inclusion of a new ABI object archive that defines "bar".
5001 NAME is a symbol defined in an archive. Return a symbol in the hash
5002 table that might be satisfied by the archive symbols. */
5003
5004static struct elf_link_hash_entry *
5005ppc64_elf_archive_symbol_lookup (bfd *abfd,
5006 struct bfd_link_info *info,
5007 const char *name)
5008{
5009 struct elf_link_hash_entry *h;
5010 char *dot_name;
5011 size_t len;
5012
5013 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
5014 if (h != NULL
5015 /* Don't return this sym if it is a fake function descriptor
5016 created by add_symbol_adjust. */
5017 && !((struct ppc_link_hash_entry *) h)->fake)
5018 return h;
5019
5020 if (name[0] == '.')
5021 return h;
5022
5023 len = strlen (name);
5024 dot_name = bfd_alloc (abfd, len + 2);
5025 if (dot_name == NULL)
5026 return (struct elf_link_hash_entry *) 0 - 1;
5027 dot_name[0] = '.';
5028 memcpy (dot_name + 1, name, len + 1);
5029 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
5030 bfd_release (abfd, dot_name);
5031 return h;
5032}
5033
5034/* This function satisfies all old ABI object references to ".bar" if a
5035 new ABI object defines "bar". Well, at least, undefined dot symbols
5036 are made weak. This stops later archive searches from including an
5037 object if we already have a function descriptor definition. It also
5038 prevents the linker complaining about undefined symbols.
5039 We also check and correct mismatched symbol visibility here. The
5040 most restrictive visibility of the function descriptor and the
5041 function entry symbol is used. */
5042
5043static bfd_boolean
5044add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
5045{
5046 struct ppc_link_hash_table *htab;
5047 struct ppc_link_hash_entry *fdh;
5048
5049 if (eh->elf.root.type == bfd_link_hash_warning)
5050 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5051
5052 if (eh->elf.root.type == bfd_link_hash_indirect)
5053 return TRUE;
5054
5055 if (eh->elf.root.root.string[0] != '.')
5056 abort ();
5057
5058 htab = ppc_hash_table (info);
5059 if (htab == NULL)
5060 return FALSE;
5061
5062 fdh = lookup_fdh (eh, htab);
5063 if (fdh == NULL
5064 && !bfd_link_relocatable (info)
5065 && (eh->elf.root.type == bfd_link_hash_undefined
5066 || eh->elf.root.type == bfd_link_hash_undefweak)
5067 && eh->elf.ref_regular)
5068 {
5069 /* Make an undefined function descriptor sym, in order to
5070 pull in an --as-needed shared lib. Archives are handled
5071 elsewhere. */
5072 fdh = make_fdh (info, eh);
5073 if (fdh == NULL)
5074 return FALSE;
5075 }
5076
5077 if (fdh != NULL)
5078 {
5079 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
5080 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
5081
5082 /* Make both descriptor and entry symbol have the most
5083 constraining visibility of either symbol. */
5084 if (entry_vis < descr_vis)
5085 fdh->elf.other += entry_vis - descr_vis;
5086 else if (entry_vis > descr_vis)
5087 eh->elf.other += descr_vis - entry_vis;
5088
5089 /* Propagate reference flags from entry symbol to function
5090 descriptor symbol. */
5091 fdh->elf.root.non_ir_ref |= eh->elf.root.non_ir_ref;
5092 fdh->elf.ref_regular |= eh->elf.ref_regular;
5093 fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak;
5094
5095 if (!fdh->elf.forced_local
5096 && fdh->elf.dynindx == -1
5097 && fdh->elf.versioned != versioned_hidden
5098 && (bfd_link_dll (info)
5099 || fdh->elf.def_dynamic
5100 || fdh->elf.ref_dynamic)
5101 && (eh->elf.ref_regular
5102 || eh->elf.def_regular))
5103 {
5104 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5105 return FALSE;
5106 }
5107 }
5108
5109 return TRUE;
5110}
5111
5112/* Set up opd section info and abiversion for IBFD, and process list
5113 of dot-symbols we made in link_hash_newfunc. */
5114
5115static bfd_boolean
5116ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info)
5117{
5118 struct ppc_link_hash_table *htab;
5119 struct ppc_link_hash_entry **p, *eh;
5120 asection *opd = bfd_get_section_by_name (ibfd, ".opd");
5121
5122 if (opd != NULL && opd->size != 0)
5123 {
5124 if (abiversion (ibfd) == 0)
5125 set_abiversion (ibfd, 1);
5126 else if (abiversion (ibfd) >= 2)
5127 {
5128 /* xgettext:c-format */
5129 info->callbacks->einfo (_("%P: %B .opd not allowed in ABI"
5130 " version %d\n"),
5131 ibfd, abiversion (ibfd));
5132 bfd_set_error (bfd_error_bad_value);
5133 return FALSE;
5134 }
5135
5136 if ((ibfd->flags & DYNAMIC) == 0
5137 && (opd->flags & SEC_RELOC) != 0
5138 && opd->reloc_count != 0
5139 && !bfd_is_abs_section (opd->output_section))
5140 {
5141 /* Garbage collection needs some extra help with .opd sections.
5142 We don't want to necessarily keep everything referenced by
5143 relocs in .opd, as that would keep all functions. Instead,
5144 if we reference an .opd symbol (a function descriptor), we
5145 want to keep the function code symbol's section. This is
5146 easy for global symbols, but for local syms we need to keep
5147 information about the associated function section. */
5148 bfd_size_type amt;
5149 asection **opd_sym_map;
5150
5151 amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map);
5152 opd_sym_map = bfd_zalloc (ibfd, amt);
5153 if (opd_sym_map == NULL)
5154 return FALSE;
5155 ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map;
5156 BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal);
5157 ppc64_elf_section_data (opd)->sec_type = sec_opd;
5158 }
5159 }
5160
5161 if (!is_ppc64_elf (info->output_bfd))
5162 return TRUE;
5163 htab = ppc_hash_table (info);
5164 if (htab == NULL)
5165 return FALSE;
5166
5167 /* For input files without an explicit abiversion in e_flags
5168 we should have flagged any with symbol st_other bits set
5169 as ELFv1 and above flagged those with .opd as ELFv2.
5170 Set the output abiversion if not yet set, and for any input
5171 still ambiguous, take its abiversion from the output.
5172 Differences in ABI are reported later. */
5173 if (abiversion (info->output_bfd) == 0)
5174 set_abiversion (info->output_bfd, abiversion (ibfd));
5175 else if (abiversion (ibfd) == 0)
5176 set_abiversion (ibfd, abiversion (info->output_bfd));
5177
5178 p = &htab->dot_syms;
5179 while ((eh = *p) != NULL)
5180 {
5181 *p = NULL;
5182 if (&eh->elf == htab->elf.hgot)
5183 ;
5184 else if (htab->elf.hgot == NULL
5185 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
5186 htab->elf.hgot = &eh->elf;
5187 else if (abiversion (ibfd) <= 1)
5188 {
5189 htab->need_func_desc_adj = 1;
5190 if (!add_symbol_adjust (eh, info))
5191 return FALSE;
5192 }
5193 p = &eh->u.next_dot_sym;
5194 }
5195 return TRUE;
5196}
5197
5198/* Undo hash table changes when an --as-needed input file is determined
5199 not to be needed. */
5200
5201static bfd_boolean
5202ppc64_elf_notice_as_needed (bfd *ibfd,
5203 struct bfd_link_info *info,
5204 enum notice_asneeded_action act)
5205{
5206 if (act == notice_not_needed)
5207 {
5208 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5209
5210 if (htab == NULL)
5211 return FALSE;
5212
5213 htab->dot_syms = NULL;
5214 }
5215 return _bfd_elf_notice_as_needed (ibfd, info, act);
5216}
5217
5218/* If --just-symbols against a final linked binary, then assume we need
5219 toc adjusting stubs when calling functions defined there. */
5220
5221static void
5222ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
5223{
5224 if ((sec->flags & SEC_CODE) != 0
5225 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
5226 && is_ppc64_elf (sec->owner))
5227 {
5228 if (abiversion (sec->owner) >= 2
5229 || bfd_get_section_by_name (sec->owner, ".opd") != NULL)
5230 sec->has_toc_reloc = 1;
5231 }
5232 _bfd_elf_link_just_syms (sec, info);
5233}
5234
5235static struct plt_entry **
5236update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
5237 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
5238{
5239 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
5240 struct plt_entry **local_plt;
5241 unsigned char *local_got_tls_masks;
5242
5243 if (local_got_ents == NULL)
5244 {
5245 bfd_size_type size = symtab_hdr->sh_info;
5246
5247 size *= (sizeof (*local_got_ents)
5248 + sizeof (*local_plt)
5249 + sizeof (*local_got_tls_masks));
5250 local_got_ents = bfd_zalloc (abfd, size);
5251 if (local_got_ents == NULL)
5252 return NULL;
5253 elf_local_got_ents (abfd) = local_got_ents;
5254 }
5255
5256 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
5257 {
5258 struct got_entry *ent;
5259
5260 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
5261 if (ent->addend == r_addend
5262 && ent->owner == abfd
5263 && ent->tls_type == tls_type)
5264 break;
5265 if (ent == NULL)
5266 {
5267 bfd_size_type amt = sizeof (*ent);
5268 ent = bfd_alloc (abfd, amt);
5269 if (ent == NULL)
5270 return FALSE;
5271 ent->next = local_got_ents[r_symndx];
5272 ent->addend = r_addend;
5273 ent->owner = abfd;
5274 ent->tls_type = tls_type;
5275 ent->is_indirect = FALSE;
5276 ent->got.refcount = 0;
5277 local_got_ents[r_symndx] = ent;
5278 }
5279 ent->got.refcount += 1;
5280 }
5281
5282 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
5283 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
5284 local_got_tls_masks[r_symndx] |= tls_type;
5285
5286 return local_plt + r_symndx;
5287}
5288
5289static bfd_boolean
5290update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5291{
5292 struct plt_entry *ent;
5293
5294 for (ent = *plist; ent != NULL; ent = ent->next)
5295 if (ent->addend == addend)
5296 break;
5297 if (ent == NULL)
5298 {
5299 bfd_size_type amt = sizeof (*ent);
5300 ent = bfd_alloc (abfd, amt);
5301 if (ent == NULL)
5302 return FALSE;
5303 ent->next = *plist;
5304 ent->addend = addend;
5305 ent->plt.refcount = 0;
5306 *plist = ent;
5307 }
5308 ent->plt.refcount += 1;
5309 return TRUE;
5310}
5311
5312static bfd_boolean
5313is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5314{
5315 return (r_type == R_PPC64_REL24
5316 || r_type == R_PPC64_REL14
5317 || r_type == R_PPC64_REL14_BRTAKEN
5318 || r_type == R_PPC64_REL14_BRNTAKEN
5319 || r_type == R_PPC64_ADDR24
5320 || r_type == R_PPC64_ADDR14
5321 || r_type == R_PPC64_ADDR14_BRTAKEN
5322 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5323}
5324
5325/* Look through the relocs for a section during the first phase, and
5326 calculate needed space in the global offset table, procedure
5327 linkage table, and dynamic reloc sections. */
5328
5329static bfd_boolean
5330ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5331 asection *sec, const Elf_Internal_Rela *relocs)
5332{
5333 struct ppc_link_hash_table *htab;
5334 Elf_Internal_Shdr *symtab_hdr;
5335 struct elf_link_hash_entry **sym_hashes;
5336 const Elf_Internal_Rela *rel;
5337 const Elf_Internal_Rela *rel_end;
5338 asection *sreloc;
5339 asection **opd_sym_map;
5340 struct elf_link_hash_entry *tga, *dottga;
5341
5342 if (bfd_link_relocatable (info))
5343 return TRUE;
5344
5345 /* Don't do anything special with non-loaded, non-alloced sections.
5346 In particular, any relocs in such sections should not affect GOT
5347 and PLT reference counting (ie. we don't allow them to create GOT
5348 or PLT entries), there's no possibility or desire to optimize TLS
5349 relocs, and there's not much point in propagating relocs to shared
5350 libs that the dynamic linker won't relocate. */
5351 if ((sec->flags & SEC_ALLOC) == 0)
5352 return TRUE;
5353
5354 BFD_ASSERT (is_ppc64_elf (abfd));
5355
5356 htab = ppc_hash_table (info);
5357 if (htab == NULL)
5358 return FALSE;
5359
5360 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5361 FALSE, FALSE, TRUE);
5362 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5363 FALSE, FALSE, TRUE);
5364 symtab_hdr = &elf_symtab_hdr (abfd);
5365 sym_hashes = elf_sym_hashes (abfd);
5366 sreloc = NULL;
5367 opd_sym_map = NULL;
5368 if (ppc64_elf_section_data (sec) != NULL
5369 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
5370 opd_sym_map = ppc64_elf_section_data (sec)->u.opd.func_sec;
5371
5372 rel_end = relocs + sec->reloc_count;
5373 for (rel = relocs; rel < rel_end; rel++)
5374 {
5375 unsigned long r_symndx;
5376 struct elf_link_hash_entry *h;
5377 enum elf_ppc64_reloc_type r_type;
5378 int tls_type;
5379 struct _ppc64_elf_section_data *ppc64_sec;
5380 struct plt_entry **ifunc, **plt_list;
5381
5382 r_symndx = ELF64_R_SYM (rel->r_info);
5383 if (r_symndx < symtab_hdr->sh_info)
5384 h = NULL;
5385 else
5386 {
5387 struct ppc_link_hash_entry *eh;
5388
5389 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5390 h = elf_follow_link (h);
5391 eh = (struct ppc_link_hash_entry *) h;
5392
5393 /* PR15323, ref flags aren't set for references in the same
5394 object. */
5395 h->root.non_ir_ref = 1;
5396 if (eh->is_func && eh->oh != NULL)
5397 eh->oh->elf.root.non_ir_ref = 1;
5398
5399 if (h == htab->elf.hgot)
5400 sec->has_toc_reloc = 1;
5401 }
5402
5403 tls_type = 0;
5404 ifunc = NULL;
5405 if (h != NULL)
5406 {
5407 if (h->type == STT_GNU_IFUNC)
5408 {
5409 h->needs_plt = 1;
5410 ifunc = &h->plt.plist;
5411 }
5412 }
5413 else
5414 {
5415 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5416 abfd, r_symndx);
5417 if (isym == NULL)
5418 return FALSE;
5419
5420 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5421 {
5422 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5423 rel->r_addend, PLT_IFUNC);
5424 if (ifunc == NULL)
5425 return FALSE;
5426 }
5427 }
5428
5429 r_type = ELF64_R_TYPE (rel->r_info);
5430 switch (r_type)
5431 {
5432 case R_PPC64_TLSGD:
5433 case R_PPC64_TLSLD:
5434 /* These special tls relocs tie a call to __tls_get_addr with
5435 its parameter symbol. */
5436 break;
5437
5438 case R_PPC64_GOT_TLSLD16:
5439 case R_PPC64_GOT_TLSLD16_LO:
5440 case R_PPC64_GOT_TLSLD16_HI:
5441 case R_PPC64_GOT_TLSLD16_HA:
5442 tls_type = TLS_TLS | TLS_LD;
5443 goto dogottls;
5444
5445 case R_PPC64_GOT_TLSGD16:
5446 case R_PPC64_GOT_TLSGD16_LO:
5447 case R_PPC64_GOT_TLSGD16_HI:
5448 case R_PPC64_GOT_TLSGD16_HA:
5449 tls_type = TLS_TLS | TLS_GD;
5450 goto dogottls;
5451
5452 case R_PPC64_GOT_TPREL16_DS:
5453 case R_PPC64_GOT_TPREL16_LO_DS:
5454 case R_PPC64_GOT_TPREL16_HI:
5455 case R_PPC64_GOT_TPREL16_HA:
5456 if (bfd_link_pic (info))
5457 info->flags |= DF_STATIC_TLS;
5458 tls_type = TLS_TLS | TLS_TPREL;
5459 goto dogottls;
5460
5461 case R_PPC64_GOT_DTPREL16_DS:
5462 case R_PPC64_GOT_DTPREL16_LO_DS:
5463 case R_PPC64_GOT_DTPREL16_HI:
5464 case R_PPC64_GOT_DTPREL16_HA:
5465 tls_type = TLS_TLS | TLS_DTPREL;
5466 dogottls:
5467 sec->has_tls_reloc = 1;
5468 /* Fall through */
5469
5470 case R_PPC64_GOT16:
5471 case R_PPC64_GOT16_DS:
5472 case R_PPC64_GOT16_HA:
5473 case R_PPC64_GOT16_HI:
5474 case R_PPC64_GOT16_LO:
5475 case R_PPC64_GOT16_LO_DS:
5476 /* This symbol requires a global offset table entry. */
5477 sec->has_toc_reloc = 1;
5478 if (r_type == R_PPC64_GOT_TLSLD16
5479 || r_type == R_PPC64_GOT_TLSGD16
5480 || r_type == R_PPC64_GOT_TPREL16_DS
5481 || r_type == R_PPC64_GOT_DTPREL16_DS
5482 || r_type == R_PPC64_GOT16
5483 || r_type == R_PPC64_GOT16_DS)
5484 {
5485 htab->do_multi_toc = 1;
5486 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5487 }
5488
5489 if (ppc64_elf_tdata (abfd)->got == NULL
5490 && !create_got_section (abfd, info))
5491 return FALSE;
5492
5493 if (h != NULL)
5494 {
5495 struct ppc_link_hash_entry *eh;
5496 struct got_entry *ent;
5497
5498 eh = (struct ppc_link_hash_entry *) h;
5499 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5500 if (ent->addend == rel->r_addend
5501 && ent->owner == abfd
5502 && ent->tls_type == tls_type)
5503 break;
5504 if (ent == NULL)
5505 {
5506 bfd_size_type amt = sizeof (*ent);
5507 ent = bfd_alloc (abfd, amt);
5508 if (ent == NULL)
5509 return FALSE;
5510 ent->next = eh->elf.got.glist;
5511 ent->addend = rel->r_addend;
5512 ent->owner = abfd;
5513 ent->tls_type = tls_type;
5514 ent->is_indirect = FALSE;
5515 ent->got.refcount = 0;
5516 eh->elf.got.glist = ent;
5517 }
5518 ent->got.refcount += 1;
5519 eh->tls_mask |= tls_type;
5520 }
5521 else
5522 /* This is a global offset table entry for a local symbol. */
5523 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5524 rel->r_addend, tls_type))
5525 return FALSE;
5526
5527 /* We may also need a plt entry if the symbol turns out to be
5528 an ifunc. */
5529 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1)
5530 {
5531 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5532 return FALSE;
5533 }
5534 break;
5535
5536 case R_PPC64_PLT16_HA:
5537 case R_PPC64_PLT16_HI:
5538 case R_PPC64_PLT16_LO:
5539 case R_PPC64_PLT32:
5540 case R_PPC64_PLT64:
5541 /* This symbol requires a procedure linkage table entry. */
5542 plt_list = ifunc;
5543 if (h != NULL)
5544 {
5545 h->needs_plt = 1;
5546 if (h->root.root.string[0] == '.'
5547 && h->root.root.string[1] != '\0')
5548 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5549 plt_list = &h->plt.plist;
5550 }
5551 if (plt_list == NULL)
5552 {
5553 /* It does not make sense to have a procedure linkage
5554 table entry for a non-ifunc local symbol. */
5555 info->callbacks->einfo
5556 /* xgettext:c-format */
5557 (_("%P: %H: %s reloc against local symbol\n"),
5558 abfd, sec, rel->r_offset,
5559 ppc64_elf_howto_table[r_type]->name);
5560 bfd_set_error (bfd_error_bad_value);
5561 return FALSE;
5562 }
5563 if (!update_plt_info (abfd, plt_list, rel->r_addend))
5564 return FALSE;
5565 break;
5566
5567 /* The following relocations don't need to propagate the
5568 relocation if linking a shared object since they are
5569 section relative. */
5570 case R_PPC64_SECTOFF:
5571 case R_PPC64_SECTOFF_LO:
5572 case R_PPC64_SECTOFF_HI:
5573 case R_PPC64_SECTOFF_HA:
5574 case R_PPC64_SECTOFF_DS:
5575 case R_PPC64_SECTOFF_LO_DS:
5576 case R_PPC64_DTPREL16:
5577 case R_PPC64_DTPREL16_LO:
5578 case R_PPC64_DTPREL16_HI:
5579 case R_PPC64_DTPREL16_HA:
5580 case R_PPC64_DTPREL16_DS:
5581 case R_PPC64_DTPREL16_LO_DS:
5582 case R_PPC64_DTPREL16_HIGH:
5583 case R_PPC64_DTPREL16_HIGHA:
5584 case R_PPC64_DTPREL16_HIGHER:
5585 case R_PPC64_DTPREL16_HIGHERA:
5586 case R_PPC64_DTPREL16_HIGHEST:
5587 case R_PPC64_DTPREL16_HIGHESTA:
5588 break;
5589
5590 /* Nor do these. */
5591 case R_PPC64_REL16:
5592 case R_PPC64_REL16_LO:
5593 case R_PPC64_REL16_HI:
5594 case R_PPC64_REL16_HA:
5595 case R_PPC64_REL16DX_HA:
5596 break;
5597
5598 /* Not supported as a dynamic relocation. */
5599 case R_PPC64_ADDR64_LOCAL:
5600 if (bfd_link_pic (info))
5601 {
5602 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
5603 ppc_howto_init ();
5604 /* xgettext:c-format */
5605 info->callbacks->einfo (_("%P: %H: %s reloc unsupported "
5606 "in shared libraries and PIEs.\n"),
5607 abfd, sec, rel->r_offset,
5608 ppc64_elf_howto_table[r_type]->name);
5609 bfd_set_error (bfd_error_bad_value);
5610 return FALSE;
5611 }
5612 break;
5613
5614 case R_PPC64_TOC16:
5615 case R_PPC64_TOC16_DS:
5616 htab->do_multi_toc = 1;
5617 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5618 /* Fall through. */
5619 case R_PPC64_TOC16_LO:
5620 case R_PPC64_TOC16_HI:
5621 case R_PPC64_TOC16_HA:
5622 case R_PPC64_TOC16_LO_DS:
5623 sec->has_toc_reloc = 1;
5624 break;
5625
5626 /* Marker reloc. */
5627 case R_PPC64_ENTRY:
5628 break;
5629
5630 /* This relocation describes the C++ object vtable hierarchy.
5631 Reconstruct it for later use during GC. */
5632 case R_PPC64_GNU_VTINHERIT:
5633 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5634 return FALSE;
5635 break;
5636
5637 /* This relocation describes which C++ vtable entries are actually
5638 used. Record for later use during GC. */
5639 case R_PPC64_GNU_VTENTRY:
5640 BFD_ASSERT (h != NULL);
5641 if (h != NULL
5642 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5643 return FALSE;
5644 break;
5645
5646 case R_PPC64_REL14:
5647 case R_PPC64_REL14_BRTAKEN:
5648 case R_PPC64_REL14_BRNTAKEN:
5649 {
5650 asection *dest = NULL;
5651
5652 /* Heuristic: If jumping outside our section, chances are
5653 we are going to need a stub. */
5654 if (h != NULL)
5655 {
5656 /* If the sym is weak it may be overridden later, so
5657 don't assume we know where a weak sym lives. */
5658 if (h->root.type == bfd_link_hash_defined)
5659 dest = h->root.u.def.section;
5660 }
5661 else
5662 {
5663 Elf_Internal_Sym *isym;
5664
5665 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5666 abfd, r_symndx);
5667 if (isym == NULL)
5668 return FALSE;
5669
5670 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5671 }
5672
5673 if (dest != sec)
5674 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5675 }
5676 /* Fall through. */
5677
5678 case R_PPC64_REL24:
5679 plt_list = ifunc;
5680 if (h != NULL)
5681 {
5682 h->needs_plt = 1;
5683 if (h->root.root.string[0] == '.'
5684 && h->root.root.string[1] != '\0')
5685 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5686
5687 if (h == tga || h == dottga)
5688 {
5689 sec->has_tls_reloc = 1;
5690 if (rel != relocs
5691 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5692 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5693 /* We have a new-style __tls_get_addr call with
5694 a marker reloc. */
5695 ;
5696 else
5697 /* Mark this section as having an old-style call. */
5698 sec->has_tls_get_addr_call = 1;
5699 }
5700 plt_list = &h->plt.plist;
5701 }
5702
5703 /* We may need a .plt entry if the function this reloc
5704 refers to is in a shared lib. */
5705 if (plt_list
5706 && !update_plt_info (abfd, plt_list, rel->r_addend))
5707 return FALSE;
5708 break;
5709
5710 case R_PPC64_ADDR14:
5711 case R_PPC64_ADDR14_BRNTAKEN:
5712 case R_PPC64_ADDR14_BRTAKEN:
5713 case R_PPC64_ADDR24:
5714 goto dodyn;
5715
5716 case R_PPC64_TPREL64:
5717 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5718 if (bfd_link_pic (info))
5719 info->flags |= DF_STATIC_TLS;
5720 goto dotlstoc;
5721
5722 case R_PPC64_DTPMOD64:
5723 if (rel + 1 < rel_end
5724 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5725 && rel[1].r_offset == rel->r_offset + 8)
5726 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5727 else
5728 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5729 goto dotlstoc;
5730
5731 case R_PPC64_DTPREL64:
5732 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5733 if (rel != relocs
5734 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5735 && rel[-1].r_offset == rel->r_offset - 8)
5736 /* This is the second reloc of a dtpmod, dtprel pair.
5737 Don't mark with TLS_DTPREL. */
5738 goto dodyn;
5739
5740 dotlstoc:
5741 sec->has_tls_reloc = 1;
5742 if (h != NULL)
5743 {
5744 struct ppc_link_hash_entry *eh;
5745 eh = (struct ppc_link_hash_entry *) h;
5746 eh->tls_mask |= tls_type;
5747 }
5748 else
5749 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5750 rel->r_addend, tls_type))
5751 return FALSE;
5752
5753 ppc64_sec = ppc64_elf_section_data (sec);
5754 if (ppc64_sec->sec_type != sec_toc)
5755 {
5756 bfd_size_type amt;
5757
5758 /* One extra to simplify get_tls_mask. */
5759 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5760 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5761 if (ppc64_sec->u.toc.symndx == NULL)
5762 return FALSE;
5763 amt = sec->size * sizeof (bfd_vma) / 8;
5764 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5765 if (ppc64_sec->u.toc.add == NULL)
5766 return FALSE;
5767 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5768 ppc64_sec->sec_type = sec_toc;
5769 }
5770 BFD_ASSERT (rel->r_offset % 8 == 0);
5771 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5772 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5773
5774 /* Mark the second slot of a GD or LD entry.
5775 -1 to indicate GD and -2 to indicate LD. */
5776 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5777 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5778 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5779 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5780 goto dodyn;
5781
5782 case R_PPC64_TPREL16:
5783 case R_PPC64_TPREL16_LO:
5784 case R_PPC64_TPREL16_HI:
5785 case R_PPC64_TPREL16_HA:
5786 case R_PPC64_TPREL16_DS:
5787 case R_PPC64_TPREL16_LO_DS:
5788 case R_PPC64_TPREL16_HIGH:
5789 case R_PPC64_TPREL16_HIGHA:
5790 case R_PPC64_TPREL16_HIGHER:
5791 case R_PPC64_TPREL16_HIGHERA:
5792 case R_PPC64_TPREL16_HIGHEST:
5793 case R_PPC64_TPREL16_HIGHESTA:
5794 if (bfd_link_pic (info))
5795 {
5796 info->flags |= DF_STATIC_TLS;
5797 goto dodyn;
5798 }
5799 break;
5800
5801 case R_PPC64_ADDR64:
5802 if (opd_sym_map != NULL
5803 && rel + 1 < rel_end
5804 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5805 {
5806 if (h != NULL)
5807 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5808 else
5809 {
5810 asection *s;
5811 Elf_Internal_Sym *isym;
5812
5813 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5814 abfd, r_symndx);
5815 if (isym == NULL)
5816 return FALSE;
5817
5818 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5819 if (s != NULL && s != sec)
5820 opd_sym_map[OPD_NDX (rel->r_offset)] = s;
5821 }
5822 }
5823 /* Fall through. */
5824
5825 case R_PPC64_ADDR16:
5826 case R_PPC64_ADDR16_DS:
5827 case R_PPC64_ADDR16_HA:
5828 case R_PPC64_ADDR16_HI:
5829 case R_PPC64_ADDR16_HIGH:
5830 case R_PPC64_ADDR16_HIGHA:
5831 case R_PPC64_ADDR16_HIGHER:
5832 case R_PPC64_ADDR16_HIGHERA:
5833 case R_PPC64_ADDR16_HIGHEST:
5834 case R_PPC64_ADDR16_HIGHESTA:
5835 case R_PPC64_ADDR16_LO:
5836 case R_PPC64_ADDR16_LO_DS:
5837 if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1
5838 && rel->r_addend == 0)
5839 {
5840 /* We may need a .plt entry if this reloc refers to a
5841 function in a shared lib. */
5842 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5843 return FALSE;
5844 h->pointer_equality_needed = 1;
5845 }
5846 /* Fall through. */
5847
5848 case R_PPC64_REL30:
5849 case R_PPC64_REL32:
5850 case R_PPC64_REL64:
5851 case R_PPC64_ADDR32:
5852 case R_PPC64_UADDR16:
5853 case R_PPC64_UADDR32:
5854 case R_PPC64_UADDR64:
5855 case R_PPC64_TOC:
5856 if (h != NULL && !bfd_link_pic (info))
5857 /* We may need a copy reloc. */
5858 h->non_got_ref = 1;
5859
5860 /* Don't propagate .opd relocs. */
5861 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5862 break;
5863
5864 /* If we are creating a shared library, and this is a reloc
5865 against a global symbol, or a non PC relative reloc
5866 against a local symbol, then we need to copy the reloc
5867 into the shared library. However, if we are linking with
5868 -Bsymbolic, we do not need to copy a reloc against a
5869 global symbol which is defined in an object we are
5870 including in the link (i.e., DEF_REGULAR is set). At
5871 this point we have not seen all the input files, so it is
5872 possible that DEF_REGULAR is not set now but will be set
5873 later (it is never cleared). In case of a weak definition,
5874 DEF_REGULAR may be cleared later by a strong definition in
5875 a shared library. We account for that possibility below by
5876 storing information in the dyn_relocs field of the hash
5877 table entry. A similar situation occurs when creating
5878 shared libraries and symbol visibility changes render the
5879 symbol local.
5880
5881 If on the other hand, we are creating an executable, we
5882 may need to keep relocations for symbols satisfied by a
5883 dynamic library if we manage to avoid copy relocs for the
5884 symbol. */
5885 dodyn:
5886 if ((bfd_link_pic (info)
5887 && (must_be_dyn_reloc (info, r_type)
5888 || (h != NULL
5889 && (!SYMBOLIC_BIND (info, h)
5890 || h->root.type == bfd_link_hash_defweak
5891 || !h->def_regular))))
5892 || (ELIMINATE_COPY_RELOCS
5893 && !bfd_link_pic (info)
5894 && h != NULL
5895 && (h->root.type == bfd_link_hash_defweak
5896 || !h->def_regular))
5897 || (!bfd_link_pic (info)
5898 && ifunc != NULL))
5899 {
5900 /* We must copy these reloc types into the output file.
5901 Create a reloc section in dynobj and make room for
5902 this reloc. */
5903 if (sreloc == NULL)
5904 {
5905 sreloc = _bfd_elf_make_dynamic_reloc_section
5906 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5907
5908 if (sreloc == NULL)
5909 return FALSE;
5910 }
5911
5912 /* If this is a global symbol, we count the number of
5913 relocations we need for this symbol. */
5914 if (h != NULL)
5915 {
5916 struct elf_dyn_relocs *p;
5917 struct elf_dyn_relocs **head;
5918
5919 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5920 p = *head;
5921 if (p == NULL || p->sec != sec)
5922 {
5923 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5924 if (p == NULL)
5925 return FALSE;
5926 p->next = *head;
5927 *head = p;
5928 p->sec = sec;
5929 p->count = 0;
5930 p->pc_count = 0;
5931 }
5932 p->count += 1;
5933 if (!must_be_dyn_reloc (info, r_type))
5934 p->pc_count += 1;
5935 }
5936 else
5937 {
5938 /* Track dynamic relocs needed for local syms too.
5939 We really need local syms available to do this
5940 easily. Oh well. */
5941 struct ppc_dyn_relocs *p;
5942 struct ppc_dyn_relocs **head;
5943 bfd_boolean is_ifunc;
5944 asection *s;
5945 void *vpp;
5946 Elf_Internal_Sym *isym;
5947
5948 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5949 abfd, r_symndx);
5950 if (isym == NULL)
5951 return FALSE;
5952
5953 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5954 if (s == NULL)
5955 s = sec;
5956
5957 vpp = &elf_section_data (s)->local_dynrel;
5958 head = (struct ppc_dyn_relocs **) vpp;
5959 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5960 p = *head;
5961 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5962 p = p->next;
5963 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5964 {
5965 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5966 if (p == NULL)
5967 return FALSE;
5968 p->next = *head;
5969 *head = p;
5970 p->sec = sec;
5971 p->ifunc = is_ifunc;
5972 p->count = 0;
5973 }
5974 p->count += 1;
5975 }
5976 }
5977 break;
5978
5979 default:
5980 break;
5981 }
5982 }
5983
5984 return TRUE;
5985}
5986
5987/* Merge backend specific data from an object file to the output
5988 object file when linking. */
5989
5990static bfd_boolean
5991ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
5992{
5993 bfd *obfd = info->output_bfd;
5994 unsigned long iflags, oflags;
5995
5996 if ((ibfd->flags & BFD_LINKER_CREATED) != 0)
5997 return TRUE;
5998
5999 if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd))
6000 return TRUE;
6001
6002 if (!_bfd_generic_verify_endian_match (ibfd, info))
6003 return FALSE;
6004
6005 iflags = elf_elfheader (ibfd)->e_flags;
6006 oflags = elf_elfheader (obfd)->e_flags;
6007
6008 if (iflags & ~EF_PPC64_ABI)
6009 {
6010 _bfd_error_handler
6011 /* xgettext:c-format */
6012 (_("%B uses unknown e_flags 0x%lx"), ibfd, iflags);
6013 bfd_set_error (bfd_error_bad_value);
6014 return FALSE;
6015 }
6016 else if (iflags != oflags && iflags != 0)
6017 {
6018 _bfd_error_handler
6019 /* xgettext:c-format */
6020 (_("%B: ABI version %ld is not compatible with ABI version %ld output"),
6021 ibfd, iflags, oflags);
6022 bfd_set_error (bfd_error_bad_value);
6023 return FALSE;
6024 }
6025
6026 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
6027
6028 /* Merge Tag_compatibility attributes and any common GNU ones. */
6029 _bfd_elf_merge_object_attributes (ibfd, info);
6030
6031 return TRUE;
6032}
6033
6034static bfd_boolean
6035ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr)
6036{
6037 /* Print normal ELF private data. */
6038 _bfd_elf_print_private_bfd_data (abfd, ptr);
6039
6040 if (elf_elfheader (abfd)->e_flags != 0)
6041 {
6042 FILE *file = ptr;
6043
6044 fprintf (file, _("private flags = 0x%lx:"),
6045 elf_elfheader (abfd)->e_flags);
6046
6047 if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0)
6048 fprintf (file, _(" [abiv%ld]"),
6049 elf_elfheader (abfd)->e_flags & EF_PPC64_ABI);
6050 fputc ('\n', file);
6051 }
6052
6053 return TRUE;
6054}
6055
6056/* OFFSET in OPD_SEC specifies a function descriptor. Return the address
6057 of the code entry point, and its section, which must be in the same
6058 object as OPD_SEC. Returns (bfd_vma) -1 on error. */
6059
6060static bfd_vma
6061opd_entry_value (asection *opd_sec,
6062 bfd_vma offset,
6063 asection **code_sec,
6064 bfd_vma *code_off,
6065 bfd_boolean in_code_sec)
6066{
6067 bfd *opd_bfd = opd_sec->owner;
6068 Elf_Internal_Rela *relocs;
6069 Elf_Internal_Rela *lo, *hi, *look;
6070 bfd_vma val;
6071
6072 /* No relocs implies we are linking a --just-symbols object, or looking
6073 at a final linked executable with addr2line or somesuch. */
6074 if (opd_sec->reloc_count == 0)
6075 {
6076 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
6077
6078 if (contents == NULL)
6079 {
6080 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
6081 return (bfd_vma) -1;
6082 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
6083 }
6084
6085 /* PR 17512: file: 64b9dfbb. */
6086 if (offset + 7 >= opd_sec->size || offset + 7 < offset)
6087 return (bfd_vma) -1;
6088
6089 val = bfd_get_64 (opd_bfd, contents + offset);
6090 if (code_sec != NULL)
6091 {
6092 asection *sec, *likely = NULL;
6093
6094 if (in_code_sec)
6095 {
6096 sec = *code_sec;
6097 if (sec->vma <= val
6098 && val < sec->vma + sec->size)
6099 likely = sec;
6100 else
6101 val = -1;
6102 }
6103 else
6104 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
6105 if (sec->vma <= val
6106 && (sec->flags & SEC_LOAD) != 0
6107 && (sec->flags & SEC_ALLOC) != 0)
6108 likely = sec;
6109 if (likely != NULL)
6110 {
6111 *code_sec = likely;
6112 if (code_off != NULL)
6113 *code_off = val - likely->vma;
6114 }
6115 }
6116 return val;
6117 }
6118
6119 BFD_ASSERT (is_ppc64_elf (opd_bfd));
6120
6121 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
6122 if (relocs == NULL)
6123 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
6124 /* PR 17512: file: df8e1fd6. */
6125 if (relocs == NULL)
6126 return (bfd_vma) -1;
6127
6128 /* Go find the opd reloc at the sym address. */
6129 lo = relocs;
6130 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
6131 val = (bfd_vma) -1;
6132 while (lo < hi)
6133 {
6134 look = lo + (hi - lo) / 2;
6135 if (look->r_offset < offset)
6136 lo = look + 1;
6137 else if (look->r_offset > offset)
6138 hi = look;
6139 else
6140 {
6141 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
6142
6143 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
6144 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
6145 {
6146 unsigned long symndx = ELF64_R_SYM (look->r_info);
6147 asection *sec = NULL;
6148
6149 if (symndx >= symtab_hdr->sh_info
6150 && elf_sym_hashes (opd_bfd) != NULL)
6151 {
6152 struct elf_link_hash_entry **sym_hashes;
6153 struct elf_link_hash_entry *rh;
6154
6155 sym_hashes = elf_sym_hashes (opd_bfd);
6156 rh = sym_hashes[symndx - symtab_hdr->sh_info];
6157 if (rh != NULL)
6158 {
6159 rh = elf_follow_link (rh);
6160 if (rh->root.type != bfd_link_hash_defined
6161 && rh->root.type != bfd_link_hash_defweak)
6162 break;
6163 if (rh->root.u.def.section->owner == opd_bfd)
6164 {
6165 val = rh->root.u.def.value;
6166 sec = rh->root.u.def.section;
6167 }
6168 }
6169 }
6170
6171 if (sec == NULL)
6172 {
6173 Elf_Internal_Sym *sym;
6174
6175 if (symndx < symtab_hdr->sh_info)
6176 {
6177 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
6178 if (sym == NULL)
6179 {
6180 size_t symcnt = symtab_hdr->sh_info;
6181 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6182 symcnt, 0,
6183 NULL, NULL, NULL);
6184 if (sym == NULL)
6185 break;
6186 symtab_hdr->contents = (bfd_byte *) sym;
6187 }
6188 sym += symndx;
6189 }
6190 else
6191 {
6192 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
6193 1, symndx,
6194 NULL, NULL, NULL);
6195 if (sym == NULL)
6196 break;
6197 }
6198 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
6199 if (sec == NULL)
6200 break;
6201 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
6202 val = sym->st_value;
6203 }
6204
6205 val += look->r_addend;
6206 if (code_off != NULL)
6207 *code_off = val;
6208 if (code_sec != NULL)
6209 {
6210 if (in_code_sec && *code_sec != sec)
6211 return -1;
6212 else
6213 *code_sec = sec;
6214 }
6215 if (sec->output_section != NULL)
6216 val += sec->output_section->vma + sec->output_offset;
6217 }
6218 break;
6219 }
6220 }
6221
6222 return val;
6223}
6224
6225/* If the ELF symbol SYM might be a function in SEC, return the
6226 function size and set *CODE_OFF to the function's entry point,
6227 otherwise return zero. */
6228
6229static bfd_size_type
6230ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
6231 bfd_vma *code_off)
6232{
6233 bfd_size_type size;
6234
6235 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
6236 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
6237 return 0;
6238
6239 size = 0;
6240 if (!(sym->flags & BSF_SYNTHETIC))
6241 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
6242
6243 if (strcmp (sym->section->name, ".opd") == 0)
6244 {
6245 struct _opd_sec_data *opd = get_opd_info (sym->section);
6246 bfd_vma symval = sym->value;
6247
6248 if (opd != NULL
6249 && opd->adjust != NULL
6250 && elf_section_data (sym->section)->relocs != NULL)
6251 {
6252 /* opd_entry_value will use cached relocs that have been
6253 adjusted, but with raw symbols. That means both local
6254 and global symbols need adjusting. */
6255 long adjust = opd->adjust[OPD_NDX (symval)];
6256 if (adjust == -1)
6257 return 0;
6258 symval += adjust;
6259 }
6260
6261 if (opd_entry_value (sym->section, symval,
6262 &sec, code_off, TRUE) == (bfd_vma) -1)
6263 return 0;
6264 /* An old ABI binary with dot-syms has a size of 24 on the .opd
6265 symbol. This size has nothing to do with the code size of the
6266 function, which is what we're supposed to return, but the
6267 code size isn't available without looking up the dot-sym.
6268 However, doing that would be a waste of time particularly
6269 since elf_find_function will look at the dot-sym anyway.
6270 Now, elf_find_function will keep the largest size of any
6271 function sym found at the code address of interest, so return
6272 1 here to avoid it incorrectly caching a larger function size
6273 for a small function. This does mean we return the wrong
6274 size for a new-ABI function of size 24, but all that does is
6275 disable caching for such functions. */
6276 if (size == 24)
6277 size = 1;
6278 }
6279 else
6280 {
6281 if (sym->section != sec)
6282 return 0;
6283 *code_off = sym->value;
6284 }
6285 if (size == 0)
6286 size = 1;
6287 return size;
6288}
6289
6290/* Return true if symbol is defined in a regular object file. */
6291
6292static bfd_boolean
6293is_static_defined (struct elf_link_hash_entry *h)
6294{
6295 return ((h->root.type == bfd_link_hash_defined
6296 || h->root.type == bfd_link_hash_defweak)
6297 && h->root.u.def.section != NULL
6298 && h->root.u.def.section->output_section != NULL);
6299}
6300
6301/* If FDH is a function descriptor symbol, return the associated code
6302 entry symbol if it is defined. Return NULL otherwise. */
6303
6304static struct ppc_link_hash_entry *
6305defined_code_entry (struct ppc_link_hash_entry *fdh)
6306{
6307 if (fdh->is_func_descriptor)
6308 {
6309 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
6310 if (fh->elf.root.type == bfd_link_hash_defined
6311 || fh->elf.root.type == bfd_link_hash_defweak)
6312 return fh;
6313 }
6314 return NULL;
6315}
6316
6317/* If FH is a function code entry symbol, return the associated
6318 function descriptor symbol if it is defined. Return NULL otherwise. */
6319
6320static struct ppc_link_hash_entry *
6321defined_func_desc (struct ppc_link_hash_entry *fh)
6322{
6323 if (fh->oh != NULL
6324 && fh->oh->is_func_descriptor)
6325 {
6326 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
6327 if (fdh->elf.root.type == bfd_link_hash_defined
6328 || fdh->elf.root.type == bfd_link_hash_defweak)
6329 return fdh;
6330 }
6331 return NULL;
6332}
6333
6334static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *);
6335
6336/* Garbage collect sections, after first dealing with dot-symbols. */
6337
6338static bfd_boolean
6339ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
6340{
6341 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6342
6343 if (htab != NULL && htab->need_func_desc_adj)
6344 {
6345 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6346 htab->need_func_desc_adj = 0;
6347 }
6348 return bfd_elf_gc_sections (abfd, info);
6349}
6350
6351/* Mark all our entry sym sections, both opd and code section. */
6352
6353static void
6354ppc64_elf_gc_keep (struct bfd_link_info *info)
6355{
6356 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6357 struct bfd_sym_chain *sym;
6358
6359 if (htab == NULL)
6360 return;
6361
6362 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
6363 {
6364 struct ppc_link_hash_entry *eh, *fh;
6365 asection *sec;
6366
6367 eh = (struct ppc_link_hash_entry *)
6368 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
6369 if (eh == NULL)
6370 continue;
6371 if (eh->elf.root.type != bfd_link_hash_defined
6372 && eh->elf.root.type != bfd_link_hash_defweak)
6373 continue;
6374
6375 fh = defined_code_entry (eh);
6376 if (fh != NULL)
6377 {
6378 sec = fh->elf.root.u.def.section;
6379 sec->flags |= SEC_KEEP;
6380 }
6381 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6382 && opd_entry_value (eh->elf.root.u.def.section,
6383 eh->elf.root.u.def.value,
6384 &sec, NULL, FALSE) != (bfd_vma) -1)
6385 sec->flags |= SEC_KEEP;
6386
6387 sec = eh->elf.root.u.def.section;
6388 sec->flags |= SEC_KEEP;
6389 }
6390}
6391
6392/* Mark sections containing dynamically referenced symbols. When
6393 building shared libraries, we must assume that any visible symbol is
6394 referenced. */
6395
6396static bfd_boolean
6397ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
6398{
6399 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6400 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
6401 struct ppc_link_hash_entry *fdh;
6402 struct bfd_elf_dynamic_list *d = info->dynamic_list;
6403
6404 /* Dynamic linking info is on the func descriptor sym. */
6405 fdh = defined_func_desc (eh);
6406 if (fdh != NULL)
6407 eh = fdh;
6408
6409 if ((eh->elf.root.type == bfd_link_hash_defined
6410 || eh->elf.root.type == bfd_link_hash_defweak)
6411 && (eh->elf.ref_dynamic
6412 || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf))
6413 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
6414 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
6415 && (!bfd_link_executable (info)
6416 || info->export_dynamic
6417 || (eh->elf.dynamic
6418 && d != NULL
6419 && (*d->match) (&d->head, NULL, eh->elf.root.root.string)))
6420 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
6421 || !bfd_hide_sym_by_version (info->version_info,
6422 eh->elf.root.root.string)))))
6423 {
6424 asection *code_sec;
6425 struct ppc_link_hash_entry *fh;
6426
6427 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6428
6429 /* Function descriptor syms cause the associated
6430 function code sym section to be marked. */
6431 fh = defined_code_entry (eh);
6432 if (fh != NULL)
6433 {
6434 code_sec = fh->elf.root.u.def.section;
6435 code_sec->flags |= SEC_KEEP;
6436 }
6437 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6438 && opd_entry_value (eh->elf.root.u.def.section,
6439 eh->elf.root.u.def.value,
6440 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6441 code_sec->flags |= SEC_KEEP;
6442 }
6443
6444 return TRUE;
6445}
6446
6447/* Return the section that should be marked against GC for a given
6448 relocation. */
6449
6450static asection *
6451ppc64_elf_gc_mark_hook (asection *sec,
6452 struct bfd_link_info *info,
6453 Elf_Internal_Rela *rel,
6454 struct elf_link_hash_entry *h,
6455 Elf_Internal_Sym *sym)
6456{
6457 asection *rsec;
6458
6459 /* Syms return NULL if we're marking .opd, so we avoid marking all
6460 function sections, as all functions are referenced in .opd. */
6461 rsec = NULL;
6462 if (get_opd_info (sec) != NULL)
6463 return rsec;
6464
6465 if (h != NULL)
6466 {
6467 enum elf_ppc64_reloc_type r_type;
6468 struct ppc_link_hash_entry *eh, *fh, *fdh;
6469
6470 r_type = ELF64_R_TYPE (rel->r_info);
6471 switch (r_type)
6472 {
6473 case R_PPC64_GNU_VTINHERIT:
6474 case R_PPC64_GNU_VTENTRY:
6475 break;
6476
6477 default:
6478 switch (h->root.type)
6479 {
6480 case bfd_link_hash_defined:
6481 case bfd_link_hash_defweak:
6482 eh = (struct ppc_link_hash_entry *) h;
6483 fdh = defined_func_desc (eh);
6484 if (fdh != NULL)
6485 {
6486 /* -mcall-aixdesc code references the dot-symbol on
6487 a call reloc. Mark the function descriptor too
6488 against garbage collection. */
6489 fdh->elf.mark = 1;
6490 if (fdh->elf.u.weakdef != NULL)
6491 fdh->elf.u.weakdef->mark = 1;
6492 eh = fdh;
6493 }
6494
6495 /* Function descriptor syms cause the associated
6496 function code sym section to be marked. */
6497 fh = defined_code_entry (eh);
6498 if (fh != NULL)
6499 {
6500 /* They also mark their opd section. */
6501 eh->elf.root.u.def.section->gc_mark = 1;
6502
6503 rsec = fh->elf.root.u.def.section;
6504 }
6505 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6506 && opd_entry_value (eh->elf.root.u.def.section,
6507 eh->elf.root.u.def.value,
6508 &rsec, NULL, FALSE) != (bfd_vma) -1)
6509 eh->elf.root.u.def.section->gc_mark = 1;
6510 else
6511 rsec = h->root.u.def.section;
6512 break;
6513
6514 case bfd_link_hash_common:
6515 rsec = h->root.u.c.p->section;
6516 break;
6517
6518 default:
6519 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6520 }
6521 }
6522 }
6523 else
6524 {
6525 struct _opd_sec_data *opd;
6526
6527 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6528 opd = get_opd_info (rsec);
6529 if (opd != NULL && opd->func_sec != NULL)
6530 {
6531 rsec->gc_mark = 1;
6532
6533 rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)];
6534 }
6535 }
6536
6537 return rsec;
6538}
6539
6540/* Update the .got, .plt. and dynamic reloc reference counts for the
6541 section being removed. */
6542
6543static bfd_boolean
6544ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6545 asection *sec, const Elf_Internal_Rela *relocs)
6546{
6547 struct ppc_link_hash_table *htab;
6548 Elf_Internal_Shdr *symtab_hdr;
6549 struct elf_link_hash_entry **sym_hashes;
6550 struct got_entry **local_got_ents;
6551 const Elf_Internal_Rela *rel, *relend;
6552
6553 if (bfd_link_relocatable (info))
6554 return TRUE;
6555
6556 if ((sec->flags & SEC_ALLOC) == 0)
6557 return TRUE;
6558
6559 elf_section_data (sec)->local_dynrel = NULL;
6560
6561 htab = ppc_hash_table (info);
6562 if (htab == NULL)
6563 return FALSE;
6564
6565 symtab_hdr = &elf_symtab_hdr (abfd);
6566 sym_hashes = elf_sym_hashes (abfd);
6567 local_got_ents = elf_local_got_ents (abfd);
6568
6569 relend = relocs + sec->reloc_count;
6570 for (rel = relocs; rel < relend; rel++)
6571 {
6572 unsigned long r_symndx;
6573 enum elf_ppc64_reloc_type r_type;
6574 struct elf_link_hash_entry *h = NULL;
6575 struct plt_entry **plt_list;
6576 unsigned char tls_type = 0;
6577
6578 r_symndx = ELF64_R_SYM (rel->r_info);
6579 r_type = ELF64_R_TYPE (rel->r_info);
6580 if (r_symndx >= symtab_hdr->sh_info)
6581 {
6582 struct ppc_link_hash_entry *eh;
6583 struct elf_dyn_relocs **pp;
6584 struct elf_dyn_relocs *p;
6585
6586 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6587 h = elf_follow_link (h);
6588 eh = (struct ppc_link_hash_entry *) h;
6589
6590 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6591 if (p->sec == sec)
6592 {
6593 /* Everything must go for SEC. */
6594 *pp = p->next;
6595 break;
6596 }
6597 }
6598
6599 switch (r_type)
6600 {
6601 case R_PPC64_GOT_TLSLD16:
6602 case R_PPC64_GOT_TLSLD16_LO:
6603 case R_PPC64_GOT_TLSLD16_HI:
6604 case R_PPC64_GOT_TLSLD16_HA:
6605 tls_type = TLS_TLS | TLS_LD;
6606 goto dogot;
6607
6608 case R_PPC64_GOT_TLSGD16:
6609 case R_PPC64_GOT_TLSGD16_LO:
6610 case R_PPC64_GOT_TLSGD16_HI:
6611 case R_PPC64_GOT_TLSGD16_HA:
6612 tls_type = TLS_TLS | TLS_GD;
6613 goto dogot;
6614
6615 case R_PPC64_GOT_TPREL16_DS:
6616 case R_PPC64_GOT_TPREL16_LO_DS:
6617 case R_PPC64_GOT_TPREL16_HI:
6618 case R_PPC64_GOT_TPREL16_HA:
6619 tls_type = TLS_TLS | TLS_TPREL;
6620 goto dogot;
6621
6622 case R_PPC64_GOT_DTPREL16_DS:
6623 case R_PPC64_GOT_DTPREL16_LO_DS:
6624 case R_PPC64_GOT_DTPREL16_HI:
6625 case R_PPC64_GOT_DTPREL16_HA:
6626 tls_type = TLS_TLS | TLS_DTPREL;
6627 goto dogot;
6628
6629 case R_PPC64_GOT16:
6630 case R_PPC64_GOT16_DS:
6631 case R_PPC64_GOT16_HA:
6632 case R_PPC64_GOT16_HI:
6633 case R_PPC64_GOT16_LO:
6634 case R_PPC64_GOT16_LO_DS:
6635 dogot:
6636 {
6637 struct got_entry *ent;
6638
6639 if (h != NULL)
6640 ent = h->got.glist;
6641 else
6642 ent = local_got_ents[r_symndx];
6643
6644 for (; ent != NULL; ent = ent->next)
6645 if (ent->addend == rel->r_addend
6646 && ent->owner == abfd
6647 && ent->tls_type == tls_type)
6648 break;
6649 if (ent == NULL)
6650 abort ();
6651 if (ent->got.refcount > 0)
6652 ent->got.refcount -= 1;
6653 }
6654 break;
6655
6656 case R_PPC64_PLT16_HA:
6657 case R_PPC64_PLT16_HI:
6658 case R_PPC64_PLT16_LO:
6659 case R_PPC64_PLT32:
6660 case R_PPC64_PLT64:
6661 case R_PPC64_REL14:
6662 case R_PPC64_REL14_BRNTAKEN:
6663 case R_PPC64_REL14_BRTAKEN:
6664 case R_PPC64_REL24:
6665 plt_list = NULL;
6666 if (h != NULL)
6667 plt_list = &h->plt.plist;
6668 else if (local_got_ents != NULL)
6669 {
6670 struct plt_entry **local_plt = (struct plt_entry **)
6671 (local_got_ents + symtab_hdr->sh_info);
6672 unsigned char *local_got_tls_masks = (unsigned char *)
6673 (local_plt + symtab_hdr->sh_info);
6674 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6675 plt_list = local_plt + r_symndx;
6676 }
6677 if (plt_list)
6678 {
6679 struct plt_entry *ent;
6680
6681 for (ent = *plt_list; ent != NULL; ent = ent->next)
6682 if (ent->addend == rel->r_addend)
6683 break;
6684 if (ent != NULL && ent->plt.refcount > 0)
6685 ent->plt.refcount -= 1;
6686 }
6687 break;
6688
6689 default:
6690 break;
6691 }
6692 }
6693 return TRUE;
6694}
6695
6696/* The maximum size of .sfpr. */
6697#define SFPR_MAX (218*4)
6698
6699struct sfpr_def_parms
6700{
6701 const char name[12];
6702 unsigned char lo, hi;
6703 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6704 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6705};
6706
6707/* Auto-generate _save*, _rest* functions in .sfpr.
6708 If STUB_SEC is non-null, define alias symbols in STUB_SEC
6709 instead. */
6710
6711static bfd_boolean
6712sfpr_define (struct bfd_link_info *info,
6713 const struct sfpr_def_parms *parm,
6714 asection *stub_sec)
6715{
6716 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6717 unsigned int i;
6718 size_t len = strlen (parm->name);
6719 bfd_boolean writing = FALSE;
6720 char sym[16];
6721
6722 if (htab == NULL)
6723 return FALSE;
6724
6725 memcpy (sym, parm->name, len);
6726 sym[len + 2] = 0;
6727
6728 for (i = parm->lo; i <= parm->hi; i++)
6729 {
6730 struct ppc_link_hash_entry *h;
6731
6732 sym[len + 0] = i / 10 + '0';
6733 sym[len + 1] = i % 10 + '0';
6734 h = (struct ppc_link_hash_entry *)
6735 elf_link_hash_lookup (&htab->elf, sym, writing, TRUE, TRUE);
6736 if (stub_sec != NULL)
6737 {
6738 if (h != NULL
6739 && h->elf.root.type == bfd_link_hash_defined
6740 && h->elf.root.u.def.section == htab->sfpr)
6741 {
6742 struct elf_link_hash_entry *s;
6743 char buf[32];
6744 sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym);
6745 s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE);
6746 if (s == NULL)
6747 return FALSE;
6748 if (s->root.type == bfd_link_hash_new
6749 || (s->root.type = bfd_link_hash_defined
6750 && s->root.u.def.section == stub_sec))
6751 {
6752 s->root.type = bfd_link_hash_defined;
6753 s->root.u.def.section = stub_sec;
6754 s->root.u.def.value = (stub_sec->size
6755 + h->elf.root.u.def.value);
6756 s->ref_regular = 1;
6757 s->def_regular = 1;
6758 s->ref_regular_nonweak = 1;
6759 s->forced_local = 1;
6760 s->non_elf = 0;
6761 s->root.linker_def = 1;
6762 }
6763 }
6764 continue;
6765 }
6766 if (h != NULL)
6767 {
6768 h->save_res = 1;
6769 if (!h->elf.def_regular)
6770 {
6771 h->elf.root.type = bfd_link_hash_defined;
6772 h->elf.root.u.def.section = htab->sfpr;
6773 h->elf.root.u.def.value = htab->sfpr->size;
6774 h->elf.type = STT_FUNC;
6775 h->elf.def_regular = 1;
6776 h->elf.non_elf = 0;
6777 _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE);
6778 writing = TRUE;
6779 if (htab->sfpr->contents == NULL)
6780 {
6781 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6782 if (htab->sfpr->contents == NULL)
6783 return FALSE;
6784 }
6785 }
6786 }
6787 if (writing)
6788 {
6789 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6790 if (i != parm->hi)
6791 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6792 else
6793 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6794 htab->sfpr->size = p - htab->sfpr->contents;
6795 }
6796 }
6797
6798 return TRUE;
6799}
6800
6801static bfd_byte *
6802savegpr0 (bfd *abfd, bfd_byte *p, int r)
6803{
6804 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6805 return p + 4;
6806}
6807
6808static bfd_byte *
6809savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6810{
6811 p = savegpr0 (abfd, p, r);
6812 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6813 p = p + 4;
6814 bfd_put_32 (abfd, BLR, p);
6815 return p + 4;
6816}
6817
6818static bfd_byte *
6819restgpr0 (bfd *abfd, bfd_byte *p, int r)
6820{
6821 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6822 return p + 4;
6823}
6824
6825static bfd_byte *
6826restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6827{
6828 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6829 p = p + 4;
6830 p = restgpr0 (abfd, p, r);
6831 bfd_put_32 (abfd, MTLR_R0, p);
6832 p = p + 4;
6833 if (r == 29)
6834 {
6835 p = restgpr0 (abfd, p, 30);
6836 p = restgpr0 (abfd, p, 31);
6837 }
6838 bfd_put_32 (abfd, BLR, p);
6839 return p + 4;
6840}
6841
6842static bfd_byte *
6843savegpr1 (bfd *abfd, bfd_byte *p, int r)
6844{
6845 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6846 return p + 4;
6847}
6848
6849static bfd_byte *
6850savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6851{
6852 p = savegpr1 (abfd, p, r);
6853 bfd_put_32 (abfd, BLR, p);
6854 return p + 4;
6855}
6856
6857static bfd_byte *
6858restgpr1 (bfd *abfd, bfd_byte *p, int r)
6859{
6860 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6861 return p + 4;
6862}
6863
6864static bfd_byte *
6865restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6866{
6867 p = restgpr1 (abfd, p, r);
6868 bfd_put_32 (abfd, BLR, p);
6869 return p + 4;
6870}
6871
6872static bfd_byte *
6873savefpr (bfd *abfd, bfd_byte *p, int r)
6874{
6875 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6876 return p + 4;
6877}
6878
6879static bfd_byte *
6880savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6881{
6882 p = savefpr (abfd, p, r);
6883 bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p);
6884 p = p + 4;
6885 bfd_put_32 (abfd, BLR, p);
6886 return p + 4;
6887}
6888
6889static bfd_byte *
6890restfpr (bfd *abfd, bfd_byte *p, int r)
6891{
6892 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6893 return p + 4;
6894}
6895
6896static bfd_byte *
6897restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6898{
6899 bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p);
6900 p = p + 4;
6901 p = restfpr (abfd, p, r);
6902 bfd_put_32 (abfd, MTLR_R0, p);
6903 p = p + 4;
6904 if (r == 29)
6905 {
6906 p = restfpr (abfd, p, 30);
6907 p = restfpr (abfd, p, 31);
6908 }
6909 bfd_put_32 (abfd, BLR, p);
6910 return p + 4;
6911}
6912
6913static bfd_byte *
6914savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6915{
6916 p = savefpr (abfd, p, r);
6917 bfd_put_32 (abfd, BLR, p);
6918 return p + 4;
6919}
6920
6921static bfd_byte *
6922restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6923{
6924 p = restfpr (abfd, p, r);
6925 bfd_put_32 (abfd, BLR, p);
6926 return p + 4;
6927}
6928
6929static bfd_byte *
6930savevr (bfd *abfd, bfd_byte *p, int r)
6931{
6932 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6933 p = p + 4;
6934 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6935 return p + 4;
6936}
6937
6938static bfd_byte *
6939savevr_tail (bfd *abfd, bfd_byte *p, int r)
6940{
6941 p = savevr (abfd, p, r);
6942 bfd_put_32 (abfd, BLR, p);
6943 return p + 4;
6944}
6945
6946static bfd_byte *
6947restvr (bfd *abfd, bfd_byte *p, int r)
6948{
6949 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6950 p = p + 4;
6951 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6952 return p + 4;
6953}
6954
6955static bfd_byte *
6956restvr_tail (bfd *abfd, bfd_byte *p, int r)
6957{
6958 p = restvr (abfd, p, r);
6959 bfd_put_32 (abfd, BLR, p);
6960 return p + 4;
6961}
6962
6963/* Called via elf_link_hash_traverse to transfer dynamic linking
6964 information on function code symbol entries to their corresponding
6965 function descriptor symbol entries. */
6966
6967static bfd_boolean
6968func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6969{
6970 struct bfd_link_info *info;
6971 struct ppc_link_hash_table *htab;
6972 struct ppc_link_hash_entry *fh;
6973 struct ppc_link_hash_entry *fdh;
6974 bfd_boolean force_local;
6975
6976 fh = (struct ppc_link_hash_entry *) h;
6977 if (fh->elf.root.type == bfd_link_hash_indirect)
6978 return TRUE;
6979
6980 if (!fh->is_func)
6981 return TRUE;
6982
6983 if (fh->elf.root.root.string[0] != '.'
6984 || fh->elf.root.root.string[1] == '\0')
6985 return TRUE;
6986
6987 info = inf;
6988 htab = ppc_hash_table (info);
6989 if (htab == NULL)
6990 return FALSE;
6991
6992 /* Find the corresponding function descriptor symbol. */
6993 fdh = lookup_fdh (fh, htab);
6994
6995 /* Resolve undefined references to dot-symbols as the value
6996 in the function descriptor, if we have one in a regular object.
6997 This is to satisfy cases like ".quad .foo". Calls to functions
6998 in dynamic objects are handled elsewhere. */
6999 if ((fh->elf.root.type == bfd_link_hash_undefined
7000 || fh->elf.root.type == bfd_link_hash_undefweak)
7001 && (fdh->elf.root.type == bfd_link_hash_defined
7002 || fdh->elf.root.type == bfd_link_hash_defweak)
7003 && get_opd_info (fdh->elf.root.u.def.section) != NULL
7004 && opd_entry_value (fdh->elf.root.u.def.section,
7005 fdh->elf.root.u.def.value,
7006 &fh->elf.root.u.def.section,
7007 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
7008 {
7009 fh->elf.root.type = fdh->elf.root.type;
7010 fh->elf.forced_local = 1;
7011 fh->elf.def_regular = fdh->elf.def_regular;
7012 fh->elf.def_dynamic = fdh->elf.def_dynamic;
7013 }
7014
7015 if (!fh->elf.dynamic)
7016 {
7017 struct plt_entry *ent;
7018
7019 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
7020 if (ent->plt.refcount > 0)
7021 break;
7022 if (ent == NULL)
7023 return TRUE;
7024 }
7025
7026 /* Create a descriptor as undefined if necessary. */
7027 if (fdh == NULL
7028 && !bfd_link_executable (info)
7029 && (fh->elf.root.type == bfd_link_hash_undefined
7030 || fh->elf.root.type == bfd_link_hash_undefweak))
7031 {
7032 fdh = make_fdh (info, fh);
7033 if (fdh == NULL)
7034 return FALSE;
7035 }
7036
7037 /* We can't support overriding of symbols on a fake descriptor. */
7038 if (fdh != NULL
7039 && fdh->fake
7040 && (fh->elf.root.type == bfd_link_hash_defined
7041 || fh->elf.root.type == bfd_link_hash_defweak))
7042 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
7043
7044 /* Transfer dynamic linking information to the function descriptor. */
7045 if (fdh != NULL)
7046 {
7047 fdh->elf.ref_regular |= fh->elf.ref_regular;
7048 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
7049 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
7050 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
7051 fdh->elf.dynamic |= fh->elf.dynamic;
7052 fdh->elf.needs_plt |= (fh->elf.needs_plt
7053 || fh->elf.type == STT_FUNC
7054 || fh->elf.type == STT_GNU_IFUNC);
7055 move_plt_plist (fh, fdh);
7056
7057 if (!fdh->elf.forced_local
7058 && fh->elf.dynindx != -1)
7059 if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
7060 return FALSE;
7061 }
7062
7063 /* Now that the info is on the function descriptor, clear the
7064 function code sym info. Any function code syms for which we
7065 don't have a definition in a regular file, we force local.
7066 This prevents a shared library from exporting syms that have
7067 been imported from another library. Function code syms that
7068 are really in the library we must leave global to prevent the
7069 linker dragging in a definition from a static library. */
7070 force_local = (!fh->elf.def_regular
7071 || fdh == NULL
7072 || !fdh->elf.def_regular
7073 || fdh->elf.forced_local);
7074 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7075
7076 return TRUE;
7077}
7078
7079static const struct sfpr_def_parms save_res_funcs[] =
7080 {
7081 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
7082 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
7083 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
7084 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
7085 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
7086 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
7087 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
7088 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
7089 { "._savef", 14, 31, savefpr, savefpr1_tail },
7090 { "._restf", 14, 31, restfpr, restfpr1_tail },
7091 { "_savevr_", 20, 31, savevr, savevr_tail },
7092 { "_restvr_", 20, 31, restvr, restvr_tail }
7093 };
7094
7095/* Called near the start of bfd_elf_size_dynamic_sections. We use
7096 this hook to a) provide some gcc support functions, and b) transfer
7097 dynamic linking information gathered so far on function code symbol
7098 entries, to their corresponding function descriptor symbol entries. */
7099
7100static bfd_boolean
7101ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
7102 struct bfd_link_info *info)
7103{
7104 struct ppc_link_hash_table *htab;
7105
7106 htab = ppc_hash_table (info);
7107 if (htab == NULL)
7108 return FALSE;
7109
7110 /* Provide any missing _save* and _rest* functions. */
7111 if (htab->sfpr != NULL)
7112 {
7113 unsigned int i;
7114
7115 htab->sfpr->size = 0;
7116 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
7117 if (!sfpr_define (info, &save_res_funcs[i], NULL))
7118 return FALSE;
7119 if (htab->sfpr->size == 0)
7120 htab->sfpr->flags |= SEC_EXCLUDE;
7121 }
7122
7123 if (bfd_link_relocatable (info))
7124 return TRUE;
7125
7126 if (htab->elf.hgot != NULL)
7127 {
7128 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
7129 /* Make .TOC. defined so as to prevent it being made dynamic.
7130 The wrong value here is fixed later in ppc64_elf_set_toc. */
7131 if (!htab->elf.hgot->def_regular
7132 || htab->elf.hgot->root.type != bfd_link_hash_defined)
7133 {
7134 htab->elf.hgot->root.type = bfd_link_hash_defined;
7135 htab->elf.hgot->root.u.def.value = 0;
7136 htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr;
7137 htab->elf.hgot->def_regular = 1;
7138 htab->elf.hgot->root.linker_def = 1;
7139 }
7140 htab->elf.hgot->type = STT_OBJECT;
7141 htab->elf.hgot->other = ((htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1))
7142 | STV_HIDDEN);
7143 }
7144
7145 if (htab->need_func_desc_adj)
7146 {
7147 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
7148 htab->need_func_desc_adj = 0;
7149 }
7150
7151 return TRUE;
7152}
7153
7154/* Return true if we have dynamic relocs against H that apply to
7155 read-only sections. */
7156
7157static bfd_boolean
7158readonly_dynrelocs (struct elf_link_hash_entry *h)
7159{
7160 struct ppc_link_hash_entry *eh;
7161 struct elf_dyn_relocs *p;
7162
7163 eh = (struct ppc_link_hash_entry *) h;
7164 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7165 {
7166 asection *s = p->sec->output_section;
7167
7168 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7169 return TRUE;
7170 }
7171 return FALSE;
7172}
7173
7174/* Return true if we have dynamic relocs against H or any of its weak
7175 aliases, that apply to read-only sections. */
7176
7177static bfd_boolean
7178alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
7179{
7180 struct ppc_link_hash_entry *eh;
7181
7182 eh = (struct ppc_link_hash_entry *) h;
7183 do
7184 {
7185 if (readonly_dynrelocs (&eh->elf))
7186 return TRUE;
7187 eh = eh->weakref;
7188 } while (eh != NULL && &eh->elf != h);
7189
7190 return FALSE;
7191}
7192
7193/* Return whether EH has pc-relative dynamic relocs. */
7194
7195static bfd_boolean
7196pc_dynrelocs (struct ppc_link_hash_entry *eh)
7197{
7198 struct elf_dyn_relocs *p;
7199
7200 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7201 if (p->pc_count != 0)
7202 return TRUE;
7203 return FALSE;
7204}
7205
7206/* Return true if a global entry stub will be created for H. Valid
7207 for ELFv2 before plt entries have been allocated. */
7208
7209static bfd_boolean
7210global_entry_stub (struct elf_link_hash_entry *h)
7211{
7212 struct plt_entry *pent;
7213
7214 if (!h->pointer_equality_needed
7215 || h->def_regular)
7216 return FALSE;
7217
7218 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7219 if (pent->plt.refcount > 0
7220 && pent->addend == 0)
7221 return TRUE;
7222
7223 return FALSE;
7224}
7225
7226/* Adjust a symbol defined by a dynamic object and referenced by a
7227 regular object. The current definition is in some section of the
7228 dynamic object, but we're not including those sections. We have to
7229 change the definition to something the rest of the link can
7230 understand. */
7231
7232static bfd_boolean
7233ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
7234 struct elf_link_hash_entry *h)
7235{
7236 struct ppc_link_hash_table *htab;
7237 asection *s, *srel;
7238
7239 htab = ppc_hash_table (info);
7240 if (htab == NULL)
7241 return FALSE;
7242
7243 /* Deal with function syms. */
7244 if (h->type == STT_FUNC
7245 || h->type == STT_GNU_IFUNC
7246 || h->needs_plt)
7247 {
7248 /* Clear procedure linkage table information for any symbol that
7249 won't need a .plt entry. */
7250 struct plt_entry *ent;
7251 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7252 if (ent->plt.refcount > 0)
7253 break;
7254 if (ent == NULL
7255 || (h->type != STT_GNU_IFUNC
7256 && (SYMBOL_CALLS_LOCAL (info, h)
7257 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7258 && h->root.type == bfd_link_hash_undefweak)))
7259 || ((struct ppc_link_hash_entry *) h)->save_res)
7260 {
7261 h->plt.plist = NULL;
7262 h->needs_plt = 0;
7263 h->pointer_equality_needed = 0;
7264 }
7265 else if (abiversion (info->output_bfd) >= 2)
7266 {
7267 /* Taking a function's address in a read/write section
7268 doesn't require us to define the function symbol in the
7269 executable on a global entry stub. A dynamic reloc can
7270 be used instead. The reason we prefer a few more dynamic
7271 relocs is that calling via a global entry stub costs a
7272 few more instructions, and pointer_equality_needed causes
7273 extra work in ld.so when resolving these symbols. */
7274 if (global_entry_stub (h)
7275 && !alias_readonly_dynrelocs (h))
7276 {
7277 h->pointer_equality_needed = 0;
7278 /* After adjust_dynamic_symbol, non_got_ref set in
7279 the non-pic case means that dyn_relocs for this
7280 symbol should be discarded. */
7281 h->non_got_ref = 0;
7282 }
7283
7284 /* If making a plt entry, then we don't need copy relocs. */
7285 return TRUE;
7286 }
7287 }
7288 else
7289 h->plt.plist = NULL;
7290
7291 /* If this is a weak symbol, and there is a real definition, the
7292 processor independent code will have arranged for us to see the
7293 real definition first, and we can just use the same value. */
7294 if (h->u.weakdef != NULL)
7295 {
7296 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
7297 || h->u.weakdef->root.type == bfd_link_hash_defweak);
7298 h->root.u.def.section = h->u.weakdef->root.u.def.section;
7299 h->root.u.def.value = h->u.weakdef->root.u.def.value;
7300 if (ELIMINATE_COPY_RELOCS)
7301 h->non_got_ref = h->u.weakdef->non_got_ref;
7302 return TRUE;
7303 }
7304
7305 /* If we are creating a shared library, we must presume that the
7306 only references to the symbol are via the global offset table.
7307 For such cases we need not do anything here; the relocations will
7308 be handled correctly by relocate_section. */
7309 if (bfd_link_pic (info))
7310 return TRUE;
7311
7312 /* If there are no references to this symbol that do not use the
7313 GOT, we don't need to generate a copy reloc. */
7314 if (!h->non_got_ref)
7315 return TRUE;
7316
7317 /* Don't generate a copy reloc for symbols defined in the executable. */
7318 if (!h->def_dynamic || !h->ref_regular || h->def_regular
7319
7320 /* If -z nocopyreloc was given, don't generate them either. */
7321 || info->nocopyreloc
7322
7323 /* If we didn't find any dynamic relocs in read-only sections, then
7324 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7325 || (ELIMINATE_COPY_RELOCS && !alias_readonly_dynrelocs (h))
7326
7327 /* Protected variables do not work with .dynbss. The copy in
7328 .dynbss won't be used by the shared library with the protected
7329 definition for the variable. Text relocations are preferable
7330 to an incorrect program. */
7331 || h->protected_def)
7332 {
7333 h->non_got_ref = 0;
7334 return TRUE;
7335 }
7336
7337 if (h->plt.plist != NULL)
7338 {
7339 /* We should never get here, but unfortunately there are versions
7340 of gcc out there that improperly (for this ABI) put initialized
7341 function pointers, vtable refs and suchlike in read-only
7342 sections. Allow them to proceed, but warn that this might
7343 break at runtime. */
7344 info->callbacks->einfo
7345 (_("%P: copy reloc against `%T' requires lazy plt linking; "
7346 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
7347 h->root.root.string);
7348 }
7349
7350 /* This is a reference to a symbol defined by a dynamic object which
7351 is not a function. */
7352
7353 /* We must allocate the symbol in our .dynbss section, which will
7354 become part of the .bss section of the executable. There will be
7355 an entry for this symbol in the .dynsym section. The dynamic
7356 object will contain position independent code, so all references
7357 from the dynamic object to this symbol will go through the global
7358 offset table. The dynamic linker will use the .dynsym entry to
7359 determine the address it must put in the global offset table, so
7360 both the dynamic object and the regular object will refer to the
7361 same memory location for the variable. */
7362
7363 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
7364 to copy the initial value out of the dynamic object and into the
7365 runtime process image. We need to remember the offset into the
7366 .rela.bss section we are going to use. */
7367 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7368 {
7369 s = htab->elf.sdynrelro;
7370 srel = htab->elf.sreldynrelro;
7371 }
7372 else
7373 {
7374 s = htab->elf.sdynbss;
7375 srel = htab->elf.srelbss;
7376 }
7377 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7378 {
7379 srel->size += sizeof (Elf64_External_Rela);
7380 h->needs_copy = 1;
7381 }
7382
7383 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7384}
7385
7386/* If given a function descriptor symbol, hide both the function code
7387 sym and the descriptor. */
7388static void
7389ppc64_elf_hide_symbol (struct bfd_link_info *info,
7390 struct elf_link_hash_entry *h,
7391 bfd_boolean force_local)
7392{
7393 struct ppc_link_hash_entry *eh;
7394 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
7395
7396 eh = (struct ppc_link_hash_entry *) h;
7397 if (eh->is_func_descriptor)
7398 {
7399 struct ppc_link_hash_entry *fh = eh->oh;
7400
7401 if (fh == NULL)
7402 {
7403 const char *p, *q;
7404 struct elf_link_hash_table *htab = elf_hash_table (info);
7405 char save;
7406
7407 /* We aren't supposed to use alloca in BFD because on
7408 systems which do not have alloca the version in libiberty
7409 calls xmalloc, which might cause the program to crash
7410 when it runs out of memory. This function doesn't have a
7411 return status, so there's no way to gracefully return an
7412 error. So cheat. We know that string[-1] can be safely
7413 accessed; It's either a string in an ELF string table,
7414 or allocated in an objalloc structure. */
7415
7416 p = eh->elf.root.root.string - 1;
7417 save = *p;
7418 *(char *) p = '.';
7419 fh = (struct ppc_link_hash_entry *)
7420 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7421 *(char *) p = save;
7422
7423 /* Unfortunately, if it so happens that the string we were
7424 looking for was allocated immediately before this string,
7425 then we overwrote the string terminator. That's the only
7426 reason the lookup should fail. */
7427 if (fh == NULL)
7428 {
7429 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
7430 while (q >= eh->elf.root.root.string && *q == *p)
7431 --q, --p;
7432 if (q < eh->elf.root.root.string && *p == '.')
7433 fh = (struct ppc_link_hash_entry *)
7434 elf_link_hash_lookup (htab, p, FALSE, FALSE, FALSE);
7435 }
7436 if (fh != NULL)
7437 {
7438 eh->oh = fh;
7439 fh->oh = eh;
7440 }
7441 }
7442 if (fh != NULL)
7443 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
7444 }
7445}
7446
7447static bfd_boolean
7448get_sym_h (struct elf_link_hash_entry **hp,
7449 Elf_Internal_Sym **symp,
7450 asection **symsecp,
7451 unsigned char **tls_maskp,
7452 Elf_Internal_Sym **locsymsp,
7453 unsigned long r_symndx,
7454 bfd *ibfd)
7455{
7456 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7457
7458 if (r_symndx >= symtab_hdr->sh_info)
7459 {
7460 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7461 struct elf_link_hash_entry *h;
7462
7463 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7464 h = elf_follow_link (h);
7465
7466 if (hp != NULL)
7467 *hp = h;
7468
7469 if (symp != NULL)
7470 *symp = NULL;
7471
7472 if (symsecp != NULL)
7473 {
7474 asection *symsec = NULL;
7475 if (h->root.type == bfd_link_hash_defined
7476 || h->root.type == bfd_link_hash_defweak)
7477 symsec = h->root.u.def.section;
7478 *symsecp = symsec;
7479 }
7480
7481 if (tls_maskp != NULL)
7482 {
7483 struct ppc_link_hash_entry *eh;
7484
7485 eh = (struct ppc_link_hash_entry *) h;
7486 *tls_maskp = &eh->tls_mask;
7487 }
7488 }
7489 else
7490 {
7491 Elf_Internal_Sym *sym;
7492 Elf_Internal_Sym *locsyms = *locsymsp;
7493
7494 if (locsyms == NULL)
7495 {
7496 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
7497 if (locsyms == NULL)
7498 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
7499 symtab_hdr->sh_info,
7500 0, NULL, NULL, NULL);
7501 if (locsyms == NULL)
7502 return FALSE;
7503 *locsymsp = locsyms;
7504 }
7505 sym = locsyms + r_symndx;
7506
7507 if (hp != NULL)
7508 *hp = NULL;
7509
7510 if (symp != NULL)
7511 *symp = sym;
7512
7513 if (symsecp != NULL)
7514 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
7515
7516 if (tls_maskp != NULL)
7517 {
7518 struct got_entry **lgot_ents;
7519 unsigned char *tls_mask;
7520
7521 tls_mask = NULL;
7522 lgot_ents = elf_local_got_ents (ibfd);
7523 if (lgot_ents != NULL)
7524 {
7525 struct plt_entry **local_plt = (struct plt_entry **)
7526 (lgot_ents + symtab_hdr->sh_info);
7527 unsigned char *lgot_masks = (unsigned char *)
7528 (local_plt + symtab_hdr->sh_info);
7529 tls_mask = &lgot_masks[r_symndx];
7530 }
7531 *tls_maskp = tls_mask;
7532 }
7533 }
7534 return TRUE;
7535}
7536
7537/* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
7538 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
7539 type suitable for optimization, and 1 otherwise. */
7540
7541static int
7542get_tls_mask (unsigned char **tls_maskp,
7543 unsigned long *toc_symndx,
7544 bfd_vma *toc_addend,
7545 Elf_Internal_Sym **locsymsp,
7546 const Elf_Internal_Rela *rel,
7547 bfd *ibfd)
7548{
7549 unsigned long r_symndx;
7550 int next_r;
7551 struct elf_link_hash_entry *h;
7552 Elf_Internal_Sym *sym;
7553 asection *sec;
7554 bfd_vma off;
7555
7556 r_symndx = ELF64_R_SYM (rel->r_info);
7557 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7558 return 0;
7559
7560 if ((*tls_maskp != NULL && **tls_maskp != 0)
7561 || sec == NULL
7562 || ppc64_elf_section_data (sec) == NULL
7563 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7564 return 1;
7565
7566 /* Look inside a TOC section too. */
7567 if (h != NULL)
7568 {
7569 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7570 off = h->root.u.def.value;
7571 }
7572 else
7573 off = sym->st_value;
7574 off += rel->r_addend;
7575 BFD_ASSERT (off % 8 == 0);
7576 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7577 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7578 if (toc_symndx != NULL)
7579 *toc_symndx = r_symndx;
7580 if (toc_addend != NULL)
7581 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7582 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7583 return 0;
7584 if ((h == NULL || is_static_defined (h))
7585 && (next_r == -1 || next_r == -2))
7586 return 1 - next_r;
7587 return 1;
7588}
7589
7590/* Find (or create) an entry in the tocsave hash table. */
7591
7592static struct tocsave_entry *
7593tocsave_find (struct ppc_link_hash_table *htab,
7594 enum insert_option insert,
7595 Elf_Internal_Sym **local_syms,
7596 const Elf_Internal_Rela *irela,
7597 bfd *ibfd)
7598{
7599 unsigned long r_indx;
7600 struct elf_link_hash_entry *h;
7601 Elf_Internal_Sym *sym;
7602 struct tocsave_entry ent, *p;
7603 hashval_t hash;
7604 struct tocsave_entry **slot;
7605
7606 r_indx = ELF64_R_SYM (irela->r_info);
7607 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7608 return NULL;
7609 if (ent.sec == NULL || ent.sec->output_section == NULL)
7610 {
7611 _bfd_error_handler
7612 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7613 return NULL;
7614 }
7615
7616 if (h != NULL)
7617 ent.offset = h->root.u.def.value;
7618 else
7619 ent.offset = sym->st_value;
7620 ent.offset += irela->r_addend;
7621
7622 hash = tocsave_htab_hash (&ent);
7623 slot = ((struct tocsave_entry **)
7624 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7625 if (slot == NULL)
7626 return NULL;
7627
7628 if (*slot == NULL)
7629 {
7630 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7631 if (p == NULL)
7632 return NULL;
7633 *p = ent;
7634 *slot = p;
7635 }
7636 return *slot;
7637}
7638
7639/* Adjust all global syms defined in opd sections. In gcc generated
7640 code for the old ABI, these will already have been done. */
7641
7642static bfd_boolean
7643adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7644{
7645 struct ppc_link_hash_entry *eh;
7646 asection *sym_sec;
7647 struct _opd_sec_data *opd;
7648
7649 if (h->root.type == bfd_link_hash_indirect)
7650 return TRUE;
7651
7652 if (h->root.type != bfd_link_hash_defined
7653 && h->root.type != bfd_link_hash_defweak)
7654 return TRUE;
7655
7656 eh = (struct ppc_link_hash_entry *) h;
7657 if (eh->adjust_done)
7658 return TRUE;
7659
7660 sym_sec = eh->elf.root.u.def.section;
7661 opd = get_opd_info (sym_sec);
7662 if (opd != NULL && opd->adjust != NULL)
7663 {
7664 long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)];
7665 if (adjust == -1)
7666 {
7667 /* This entry has been deleted. */
7668 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7669 if (dsec == NULL)
7670 {
7671 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7672 if (discarded_section (dsec))
7673 {
7674 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7675 break;
7676 }
7677 }
7678 eh->elf.root.u.def.value = 0;
7679 eh->elf.root.u.def.section = dsec;
7680 }
7681 else
7682 eh->elf.root.u.def.value += adjust;
7683 eh->adjust_done = 1;
7684 }
7685 return TRUE;
7686}
7687
7688/* Handles decrementing dynamic reloc counts for the reloc specified by
7689 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7690 have already been determined. */
7691
7692static bfd_boolean
7693dec_dynrel_count (bfd_vma r_info,
7694 asection *sec,
7695 struct bfd_link_info *info,
7696 Elf_Internal_Sym **local_syms,
7697 struct elf_link_hash_entry *h,
7698 Elf_Internal_Sym *sym)
7699{
7700 enum elf_ppc64_reloc_type r_type;
7701 asection *sym_sec = NULL;
7702
7703 /* Can this reloc be dynamic? This switch, and later tests here
7704 should be kept in sync with the code in check_relocs. */
7705 r_type = ELF64_R_TYPE (r_info);
7706 switch (r_type)
7707 {
7708 default:
7709 return TRUE;
7710
7711 case R_PPC64_TPREL16:
7712 case R_PPC64_TPREL16_LO:
7713 case R_PPC64_TPREL16_HI:
7714 case R_PPC64_TPREL16_HA:
7715 case R_PPC64_TPREL16_DS:
7716 case R_PPC64_TPREL16_LO_DS:
7717 case R_PPC64_TPREL16_HIGH:
7718 case R_PPC64_TPREL16_HIGHA:
7719 case R_PPC64_TPREL16_HIGHER:
7720 case R_PPC64_TPREL16_HIGHERA:
7721 case R_PPC64_TPREL16_HIGHEST:
7722 case R_PPC64_TPREL16_HIGHESTA:
7723 if (!bfd_link_pic (info))
7724 return TRUE;
7725
7726 case R_PPC64_TPREL64:
7727 case R_PPC64_DTPMOD64:
7728 case R_PPC64_DTPREL64:
7729 case R_PPC64_ADDR64:
7730 case R_PPC64_REL30:
7731 case R_PPC64_REL32:
7732 case R_PPC64_REL64:
7733 case R_PPC64_ADDR14:
7734 case R_PPC64_ADDR14_BRNTAKEN:
7735 case R_PPC64_ADDR14_BRTAKEN:
7736 case R_PPC64_ADDR16:
7737 case R_PPC64_ADDR16_DS:
7738 case R_PPC64_ADDR16_HA:
7739 case R_PPC64_ADDR16_HI:
7740 case R_PPC64_ADDR16_HIGH:
7741 case R_PPC64_ADDR16_HIGHA:
7742 case R_PPC64_ADDR16_HIGHER:
7743 case R_PPC64_ADDR16_HIGHERA:
7744 case R_PPC64_ADDR16_HIGHEST:
7745 case R_PPC64_ADDR16_HIGHESTA:
7746 case R_PPC64_ADDR16_LO:
7747 case R_PPC64_ADDR16_LO_DS:
7748 case R_PPC64_ADDR24:
7749 case R_PPC64_ADDR32:
7750 case R_PPC64_UADDR16:
7751 case R_PPC64_UADDR32:
7752 case R_PPC64_UADDR64:
7753 case R_PPC64_TOC:
7754 break;
7755 }
7756
7757 if (local_syms != NULL)
7758 {
7759 unsigned long r_symndx;
7760 bfd *ibfd = sec->owner;
7761
7762 r_symndx = ELF64_R_SYM (r_info);
7763 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7764 return FALSE;
7765 }
7766
7767 if ((bfd_link_pic (info)
7768 && (must_be_dyn_reloc (info, r_type)
7769 || (h != NULL
7770 && (!SYMBOLIC_BIND (info, h)
7771 || h->root.type == bfd_link_hash_defweak
7772 || !h->def_regular))))
7773 || (ELIMINATE_COPY_RELOCS
7774 && !bfd_link_pic (info)
7775 && h != NULL
7776 && (h->root.type == bfd_link_hash_defweak
7777 || !h->def_regular)))
7778 ;
7779 else
7780 return TRUE;
7781
7782 if (h != NULL)
7783 {
7784 struct elf_dyn_relocs *p;
7785 struct elf_dyn_relocs **pp;
7786 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7787
7788 /* elf_gc_sweep may have already removed all dyn relocs associated
7789 with local syms for a given section. Also, symbol flags are
7790 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7791 report a dynreloc miscount. */
7792 if (*pp == NULL && info->gc_sections)
7793 return TRUE;
7794
7795 while ((p = *pp) != NULL)
7796 {
7797 if (p->sec == sec)
7798 {
7799 if (!must_be_dyn_reloc (info, r_type))
7800 p->pc_count -= 1;
7801 p->count -= 1;
7802 if (p->count == 0)
7803 *pp = p->next;
7804 return TRUE;
7805 }
7806 pp = &p->next;
7807 }
7808 }
7809 else
7810 {
7811 struct ppc_dyn_relocs *p;
7812 struct ppc_dyn_relocs **pp;
7813 void *vpp;
7814 bfd_boolean is_ifunc;
7815
7816 if (local_syms == NULL)
7817 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7818 if (sym_sec == NULL)
7819 sym_sec = sec;
7820
7821 vpp = &elf_section_data (sym_sec)->local_dynrel;
7822 pp = (struct ppc_dyn_relocs **) vpp;
7823
7824 if (*pp == NULL && info->gc_sections)
7825 return TRUE;
7826
7827 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7828 while ((p = *pp) != NULL)
7829 {
7830 if (p->sec == sec && p->ifunc == is_ifunc)
7831 {
7832 p->count -= 1;
7833 if (p->count == 0)
7834 *pp = p->next;
7835 return TRUE;
7836 }
7837 pp = &p->next;
7838 }
7839 }
7840
7841 /* xgettext:c-format */
7842 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7843 sec->owner, sec);
7844 bfd_set_error (bfd_error_bad_value);
7845 return FALSE;
7846}
7847
7848/* Remove unused Official Procedure Descriptor entries. Currently we
7849 only remove those associated with functions in discarded link-once
7850 sections, or weakly defined functions that have been overridden. It
7851 would be possible to remove many more entries for statically linked
7852 applications. */
7853
7854bfd_boolean
7855ppc64_elf_edit_opd (struct bfd_link_info *info)
7856{
7857 bfd *ibfd;
7858 bfd_boolean some_edited = FALSE;
7859 asection *need_pad = NULL;
7860 struct ppc_link_hash_table *htab;
7861
7862 htab = ppc_hash_table (info);
7863 if (htab == NULL)
7864 return FALSE;
7865
7866 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7867 {
7868 asection *sec;
7869 Elf_Internal_Rela *relstart, *rel, *relend;
7870 Elf_Internal_Shdr *symtab_hdr;
7871 Elf_Internal_Sym *local_syms;
7872 struct _opd_sec_data *opd;
7873 bfd_boolean need_edit, add_aux_fields, broken;
7874 bfd_size_type cnt_16b = 0;
7875
7876 if (!is_ppc64_elf (ibfd))
7877 continue;
7878
7879 sec = bfd_get_section_by_name (ibfd, ".opd");
7880 if (sec == NULL || sec->size == 0)
7881 continue;
7882
7883 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7884 continue;
7885
7886 if (sec->output_section == bfd_abs_section_ptr)
7887 continue;
7888
7889 /* Look through the section relocs. */
7890 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7891 continue;
7892
7893 local_syms = NULL;
7894 symtab_hdr = &elf_symtab_hdr (ibfd);
7895
7896 /* Read the relocations. */
7897 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7898 info->keep_memory);
7899 if (relstart == NULL)
7900 return FALSE;
7901
7902 /* First run through the relocs to check they are sane, and to
7903 determine whether we need to edit this opd section. */
7904 need_edit = FALSE;
7905 broken = FALSE;
7906 need_pad = sec;
7907 relend = relstart + sec->reloc_count;
7908 for (rel = relstart; rel < relend; )
7909 {
7910 enum elf_ppc64_reloc_type r_type;
7911 unsigned long r_symndx;
7912 asection *sym_sec;
7913 struct elf_link_hash_entry *h;
7914 Elf_Internal_Sym *sym;
7915 bfd_vma offset;
7916
7917 /* .opd contains an array of 16 or 24 byte entries. We're
7918 only interested in the reloc pointing to a function entry
7919 point. */
7920 offset = rel->r_offset;
7921 if (rel + 1 == relend
7922 || rel[1].r_offset != offset + 8)
7923 {
7924 /* If someone messes with .opd alignment then after a
7925 "ld -r" we might have padding in the middle of .opd.
7926 Also, there's nothing to prevent someone putting
7927 something silly in .opd with the assembler. No .opd
7928 optimization for them! */
7929 broken_opd:
7930 _bfd_error_handler
7931 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7932 broken = TRUE;
7933 break;
7934 }
7935
7936 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7937 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7938 {
7939 _bfd_error_handler
7940 /* xgettext:c-format */
7941 (_("%B: unexpected reloc type %u in .opd section"),
7942 ibfd, r_type);
7943 broken = TRUE;
7944 break;
7945 }
7946
7947 r_symndx = ELF64_R_SYM (rel->r_info);
7948 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7949 r_symndx, ibfd))
7950 goto error_ret;
7951
7952 if (sym_sec == NULL || sym_sec->owner == NULL)
7953 {
7954 const char *sym_name;
7955 if (h != NULL)
7956 sym_name = h->root.root.string;
7957 else
7958 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7959 sym_sec);
7960
7961 _bfd_error_handler
7962 /* xgettext:c-format */
7963 (_("%B: undefined sym `%s' in .opd section"),
7964 ibfd, sym_name);
7965 broken = TRUE;
7966 break;
7967 }
7968
7969 /* opd entries are always for functions defined in the
7970 current input bfd. If the symbol isn't defined in the
7971 input bfd, then we won't be using the function in this
7972 bfd; It must be defined in a linkonce section in another
7973 bfd, or is weak. It's also possible that we are
7974 discarding the function due to a linker script /DISCARD/,
7975 which we test for via the output_section. */
7976 if (sym_sec->owner != ibfd
7977 || sym_sec->output_section == bfd_abs_section_ptr)
7978 need_edit = TRUE;
7979
7980 rel += 2;
7981 if (rel + 1 == relend
7982 || (rel + 2 < relend
7983 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC))
7984 ++rel;
7985
7986 if (rel == relend)
7987 {
7988 if (sec->size == offset + 24)
7989 {
7990 need_pad = NULL;
7991 break;
7992 }
7993 if (sec->size == offset + 16)
7994 {
7995 cnt_16b++;
7996 break;
7997 }
7998 goto broken_opd;
7999 }
8000 else if (rel + 1 < relend
8001 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
8002 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
8003 {
8004 if (rel[0].r_offset == offset + 16)
8005 cnt_16b++;
8006 else if (rel[0].r_offset != offset + 24)
8007 goto broken_opd;
8008 }
8009 else
8010 goto broken_opd;
8011 }
8012
8013 add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0;
8014
8015 if (!broken && (need_edit || add_aux_fields))
8016 {
8017 Elf_Internal_Rela *write_rel;
8018 Elf_Internal_Shdr *rel_hdr;
8019 bfd_byte *rptr, *wptr;
8020 bfd_byte *new_contents;
8021 bfd_size_type amt;
8022
8023 new_contents = NULL;
8024 amt = OPD_NDX (sec->size) * sizeof (long);
8025 opd = &ppc64_elf_section_data (sec)->u.opd;
8026 opd->adjust = bfd_zalloc (sec->owner, amt);
8027 if (opd->adjust == NULL)
8028 return FALSE;
8029 ppc64_elf_section_data (sec)->sec_type = sec_opd;
8030
8031 /* This seems a waste of time as input .opd sections are all
8032 zeros as generated by gcc, but I suppose there's no reason
8033 this will always be so. We might start putting something in
8034 the third word of .opd entries. */
8035 if ((sec->flags & SEC_IN_MEMORY) == 0)
8036 {
8037 bfd_byte *loc;
8038 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
8039 {
8040 if (loc != NULL)
8041 free (loc);
8042 error_ret:
8043 if (local_syms != NULL
8044 && symtab_hdr->contents != (unsigned char *) local_syms)
8045 free (local_syms);
8046 if (elf_section_data (sec)->relocs != relstart)
8047 free (relstart);
8048 return FALSE;
8049 }
8050 sec->contents = loc;
8051 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8052 }
8053
8054 elf_section_data (sec)->relocs = relstart;
8055
8056 new_contents = sec->contents;
8057 if (add_aux_fields)
8058 {
8059 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
8060 if (new_contents == NULL)
8061 return FALSE;
8062 need_pad = NULL;
8063 }
8064 wptr = new_contents;
8065 rptr = sec->contents;
8066 write_rel = relstart;
8067 for (rel = relstart; rel < relend; )
8068 {
8069 unsigned long r_symndx;
8070 asection *sym_sec;
8071 struct elf_link_hash_entry *h;
8072 struct ppc_link_hash_entry *fdh = NULL;
8073 Elf_Internal_Sym *sym;
8074 long opd_ent_size;
8075 Elf_Internal_Rela *next_rel;
8076 bfd_boolean skip;
8077
8078 r_symndx = ELF64_R_SYM (rel->r_info);
8079 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8080 r_symndx, ibfd))
8081 goto error_ret;
8082
8083 next_rel = rel + 2;
8084 if (next_rel + 1 == relend
8085 || (next_rel + 2 < relend
8086 && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC))
8087 ++next_rel;
8088
8089 /* See if the .opd entry is full 24 byte or
8090 16 byte (with fd_aux entry overlapped with next
8091 fd_func). */
8092 opd_ent_size = 24;
8093 if (next_rel == relend)
8094 {
8095 if (sec->size == rel->r_offset + 16)
8096 opd_ent_size = 16;
8097 }
8098 else if (next_rel->r_offset == rel->r_offset + 16)
8099 opd_ent_size = 16;
8100
8101 if (h != NULL
8102 && h->root.root.string[0] == '.')
8103 {
8104 fdh = ((struct ppc_link_hash_entry *) h)->oh;
8105 if (fdh != NULL)
8106 {
8107 fdh = ppc_follow_link (fdh);
8108 if (fdh->elf.root.type != bfd_link_hash_defined
8109 && fdh->elf.root.type != bfd_link_hash_defweak)
8110 fdh = NULL;
8111 }
8112 }
8113
8114 skip = (sym_sec->owner != ibfd
8115 || sym_sec->output_section == bfd_abs_section_ptr);
8116 if (skip)
8117 {
8118 if (fdh != NULL && sym_sec->owner == ibfd)
8119 {
8120 /* Arrange for the function descriptor sym
8121 to be dropped. */
8122 fdh->elf.root.u.def.value = 0;
8123 fdh->elf.root.u.def.section = sym_sec;
8124 }
8125 opd->adjust[OPD_NDX (rel->r_offset)] = -1;
8126
8127 if (NO_OPD_RELOCS || bfd_link_relocatable (info))
8128 rel = next_rel;
8129 else
8130 while (1)
8131 {
8132 if (!dec_dynrel_count (rel->r_info, sec, info,
8133 NULL, h, sym))
8134 goto error_ret;
8135
8136 if (++rel == next_rel)
8137 break;
8138
8139 r_symndx = ELF64_R_SYM (rel->r_info);
8140 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8141 r_symndx, ibfd))
8142 goto error_ret;
8143 }
8144 }
8145 else
8146 {
8147 /* We'll be keeping this opd entry. */
8148 long adjust;
8149
8150 if (fdh != NULL)
8151 {
8152 /* Redefine the function descriptor symbol to
8153 this location in the opd section. It is
8154 necessary to update the value here rather
8155 than using an array of adjustments as we do
8156 for local symbols, because various places
8157 in the generic ELF code use the value
8158 stored in u.def.value. */
8159 fdh->elf.root.u.def.value = wptr - new_contents;
8160 fdh->adjust_done = 1;
8161 }
8162
8163 /* Local syms are a bit tricky. We could
8164 tweak them as they can be cached, but
8165 we'd need to look through the local syms
8166 for the function descriptor sym which we
8167 don't have at the moment. So keep an
8168 array of adjustments. */
8169 adjust = (wptr - new_contents) - (rptr - sec->contents);
8170 opd->adjust[OPD_NDX (rel->r_offset)] = adjust;
8171
8172 if (wptr != rptr)
8173 memcpy (wptr, rptr, opd_ent_size);
8174 wptr += opd_ent_size;
8175 if (add_aux_fields && opd_ent_size == 16)
8176 {
8177 memset (wptr, '\0', 8);
8178 wptr += 8;
8179 }
8180
8181 /* We need to adjust any reloc offsets to point to the
8182 new opd entries. */
8183 for ( ; rel != next_rel; ++rel)
8184 {
8185 rel->r_offset += adjust;
8186 if (write_rel != rel)
8187 memcpy (write_rel, rel, sizeof (*rel));
8188 ++write_rel;
8189 }
8190 }
8191
8192 rptr += opd_ent_size;
8193 }
8194
8195 sec->size = wptr - new_contents;
8196 sec->reloc_count = write_rel - relstart;
8197 if (add_aux_fields)
8198 {
8199 free (sec->contents);
8200 sec->contents = new_contents;
8201 }
8202
8203 /* Fudge the header size too, as this is used later in
8204 elf_bfd_final_link if we are emitting relocs. */
8205 rel_hdr = _bfd_elf_single_rel_hdr (sec);
8206 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
8207 some_edited = TRUE;
8208 }
8209 else if (elf_section_data (sec)->relocs != relstart)
8210 free (relstart);
8211
8212 if (local_syms != NULL
8213 && symtab_hdr->contents != (unsigned char *) local_syms)
8214 {
8215 if (!info->keep_memory)
8216 free (local_syms);
8217 else
8218 symtab_hdr->contents = (unsigned char *) local_syms;
8219 }
8220 }
8221
8222 if (some_edited)
8223 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
8224
8225 /* If we are doing a final link and the last .opd entry is just 16 byte
8226 long, add a 8 byte padding after it. */
8227 if (need_pad != NULL && !bfd_link_relocatable (info))
8228 {
8229 bfd_byte *p;
8230
8231 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
8232 {
8233 BFD_ASSERT (need_pad->size > 0);
8234
8235 p = bfd_malloc (need_pad->size + 8);
8236 if (p == NULL)
8237 return FALSE;
8238
8239 if (! bfd_get_section_contents (need_pad->owner, need_pad,
8240 p, 0, need_pad->size))
8241 return FALSE;
8242
8243 need_pad->contents = p;
8244 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
8245 }
8246 else
8247 {
8248 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
8249 if (p == NULL)
8250 return FALSE;
8251
8252 need_pad->contents = p;
8253 }
8254
8255 memset (need_pad->contents + need_pad->size, 0, 8);
8256 need_pad->size += 8;
8257 }
8258
8259 return TRUE;
8260}
8261
8262/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
8263
8264asection *
8265ppc64_elf_tls_setup (struct bfd_link_info *info)
8266{
8267 struct ppc_link_hash_table *htab;
8268
8269 htab = ppc_hash_table (info);
8270 if (htab == NULL)
8271 return NULL;
8272
8273 if (abiversion (info->output_bfd) == 1)
8274 htab->opd_abi = 1;
8275
8276 if (htab->params->no_multi_toc)
8277 htab->do_multi_toc = 0;
8278 else if (!htab->do_multi_toc)
8279 htab->params->no_multi_toc = 1;
8280
8281 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
8282 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
8283 FALSE, FALSE, TRUE));
8284 /* Move dynamic linking info to the function descriptor sym. */
8285 if (htab->tls_get_addr != NULL)
8286 func_desc_adjust (&htab->tls_get_addr->elf, info);
8287 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
8288 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
8289 FALSE, FALSE, TRUE));
8290 if (htab->params->tls_get_addr_opt)
8291 {
8292 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
8293
8294 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
8295 FALSE, FALSE, TRUE);
8296 if (opt != NULL)
8297 func_desc_adjust (opt, info);
8298 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
8299 FALSE, FALSE, TRUE);
8300 if (opt_fd != NULL
8301 && (opt_fd->root.type == bfd_link_hash_defined
8302 || opt_fd->root.type == bfd_link_hash_defweak))
8303 {
8304 /* If glibc supports an optimized __tls_get_addr call stub,
8305 signalled by the presence of __tls_get_addr_opt, and we'll
8306 be calling __tls_get_addr via a plt call stub, then
8307 make __tls_get_addr point to __tls_get_addr_opt. */
8308 tga_fd = &htab->tls_get_addr_fd->elf;
8309 if (htab->elf.dynamic_sections_created
8310 && tga_fd != NULL
8311 && (tga_fd->type == STT_FUNC
8312 || tga_fd->needs_plt)
8313 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
8314 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
8315 && tga_fd->root.type == bfd_link_hash_undefweak)))
8316 {
8317 struct plt_entry *ent;
8318
8319 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
8320 if (ent->plt.refcount > 0)
8321 break;
8322 if (ent != NULL)
8323 {
8324 tga_fd->root.type = bfd_link_hash_indirect;
8325 tga_fd->root.u.i.link = &opt_fd->root;
8326 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
8327 opt_fd->forced_local = 0;
8328 if (opt_fd->dynindx != -1)
8329 {
8330 /* Use __tls_get_addr_opt in dynamic relocations. */
8331 opt_fd->dynindx = -1;
8332 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
8333 opt_fd->dynstr_index);
8334 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
8335 return NULL;
8336 }
8337 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
8338 tga = &htab->tls_get_addr->elf;
8339 if (opt != NULL && tga != NULL)
8340 {
8341 tga->root.type = bfd_link_hash_indirect;
8342 tga->root.u.i.link = &opt->root;
8343 ppc64_elf_copy_indirect_symbol (info, opt, tga);
8344 opt->forced_local = 0;
8345 _bfd_elf_link_hash_hide_symbol (info, opt,
8346 tga->forced_local);
8347 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
8348 }
8349 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
8350 htab->tls_get_addr_fd->is_func_descriptor = 1;
8351 if (htab->tls_get_addr != NULL)
8352 {
8353 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
8354 htab->tls_get_addr->is_func = 1;
8355 }
8356 }
8357 }
8358 }
8359 else if (htab->params->tls_get_addr_opt < 0)
8360 htab->params->tls_get_addr_opt = 0;
8361 }
8362 return _bfd_elf_tls_setup (info->output_bfd, info);
8363}
8364
8365/* Return TRUE iff REL is a branch reloc with a global symbol matching
8366 HASH1 or HASH2. */
8367
8368static bfd_boolean
8369branch_reloc_hash_match (const bfd *ibfd,
8370 const Elf_Internal_Rela *rel,
8371 const struct ppc_link_hash_entry *hash1,
8372 const struct ppc_link_hash_entry *hash2)
8373{
8374 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
8375 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
8376 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
8377
8378 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
8379 {
8380 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
8381 struct elf_link_hash_entry *h;
8382
8383 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
8384 h = elf_follow_link (h);
8385 if (h == &hash1->elf || h == &hash2->elf)
8386 return TRUE;
8387 }
8388 return FALSE;
8389}
8390
8391/* Run through all the TLS relocs looking for optimization
8392 opportunities. The linker has been hacked (see ppc64elf.em) to do
8393 a preliminary section layout so that we know the TLS segment
8394 offsets. We can't optimize earlier because some optimizations need
8395 to know the tp offset, and we need to optimize before allocating
8396 dynamic relocations. */
8397
8398bfd_boolean
8399ppc64_elf_tls_optimize (struct bfd_link_info *info)
8400{
8401 bfd *ibfd;
8402 asection *sec;
8403 struct ppc_link_hash_table *htab;
8404 unsigned char *toc_ref;
8405 int pass;
8406
8407 if (!bfd_link_executable (info))
8408 return TRUE;
8409
8410 htab = ppc_hash_table (info);
8411 if (htab == NULL)
8412 return FALSE;
8413
8414 /* Make two passes over the relocs. On the first pass, mark toc
8415 entries involved with tls relocs, and check that tls relocs
8416 involved in setting up a tls_get_addr call are indeed followed by
8417 such a call. If they are not, we can't do any tls optimization.
8418 On the second pass twiddle tls_mask flags to notify
8419 relocate_section that optimization can be done, and adjust got
8420 and plt refcounts. */
8421 toc_ref = NULL;
8422 for (pass = 0; pass < 2; ++pass)
8423 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8424 {
8425 Elf_Internal_Sym *locsyms = NULL;
8426 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
8427
8428 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8429 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
8430 {
8431 Elf_Internal_Rela *relstart, *rel, *relend;
8432 bfd_boolean found_tls_get_addr_arg = 0;
8433
8434 /* Read the relocations. */
8435 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8436 info->keep_memory);
8437 if (relstart == NULL)
8438 {
8439 free (toc_ref);
8440 return FALSE;
8441 }
8442
8443 relend = relstart + sec->reloc_count;
8444 for (rel = relstart; rel < relend; rel++)
8445 {
8446 enum elf_ppc64_reloc_type r_type;
8447 unsigned long r_symndx;
8448 struct elf_link_hash_entry *h;
8449 Elf_Internal_Sym *sym;
8450 asection *sym_sec;
8451 unsigned char *tls_mask;
8452 unsigned char tls_set, tls_clear, tls_type = 0;
8453 bfd_vma value;
8454 bfd_boolean ok_tprel, is_local;
8455 long toc_ref_index = 0;
8456 int expecting_tls_get_addr = 0;
8457 bfd_boolean ret = FALSE;
8458
8459 r_symndx = ELF64_R_SYM (rel->r_info);
8460 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
8461 r_symndx, ibfd))
8462 {
8463 err_free_rel:
8464 if (elf_section_data (sec)->relocs != relstart)
8465 free (relstart);
8466 if (toc_ref != NULL)
8467 free (toc_ref);
8468 if (locsyms != NULL
8469 && (elf_symtab_hdr (ibfd).contents
8470 != (unsigned char *) locsyms))
8471 free (locsyms);
8472 return ret;
8473 }
8474
8475 if (h != NULL)
8476 {
8477 if (h->root.type == bfd_link_hash_defined
8478 || h->root.type == bfd_link_hash_defweak)
8479 value = h->root.u.def.value;
8480 else if (h->root.type == bfd_link_hash_undefweak)
8481 value = 0;
8482 else
8483 {
8484 found_tls_get_addr_arg = 0;
8485 continue;
8486 }
8487 }
8488 else
8489 /* Symbols referenced by TLS relocs must be of type
8490 STT_TLS. So no need for .opd local sym adjust. */
8491 value = sym->st_value;
8492
8493 ok_tprel = FALSE;
8494 is_local = FALSE;
8495 if (h == NULL
8496 || !h->def_dynamic)
8497 {
8498 is_local = TRUE;
8499 if (h != NULL
8500 && h->root.type == bfd_link_hash_undefweak)
8501 ok_tprel = TRUE;
8502 else if (sym_sec != NULL
8503 && sym_sec->output_section != NULL)
8504 {
8505 value += sym_sec->output_offset;
8506 value += sym_sec->output_section->vma;
8507 value -= htab->elf.tls_sec->vma;
8508 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
8509 < (bfd_vma) 1 << 32);
8510 }
8511 }
8512
8513 r_type = ELF64_R_TYPE (rel->r_info);
8514 /* If this section has old-style __tls_get_addr calls
8515 without marker relocs, then check that each
8516 __tls_get_addr call reloc is preceded by a reloc
8517 that conceivably belongs to the __tls_get_addr arg
8518 setup insn. If we don't find matching arg setup
8519 relocs, don't do any tls optimization. */
8520 if (pass == 0
8521 && sec->has_tls_get_addr_call
8522 && h != NULL
8523 && (h == &htab->tls_get_addr->elf
8524 || h == &htab->tls_get_addr_fd->elf)
8525 && !found_tls_get_addr_arg
8526 && is_branch_reloc (r_type))
8527 {
8528 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
8529 "TLS optimization disabled\n"),
8530 ibfd, sec, rel->r_offset);
8531 ret = TRUE;
8532 goto err_free_rel;
8533 }
8534
8535 found_tls_get_addr_arg = 0;
8536 switch (r_type)
8537 {
8538 case R_PPC64_GOT_TLSLD16:
8539 case R_PPC64_GOT_TLSLD16_LO:
8540 expecting_tls_get_addr = 1;
8541 found_tls_get_addr_arg = 1;
8542 /* Fall through. */
8543
8544 case R_PPC64_GOT_TLSLD16_HI:
8545 case R_PPC64_GOT_TLSLD16_HA:
8546 /* These relocs should never be against a symbol
8547 defined in a shared lib. Leave them alone if
8548 that turns out to be the case. */
8549 if (!is_local)
8550 continue;
8551
8552 /* LD -> LE */
8553 tls_set = 0;
8554 tls_clear = TLS_LD;
8555 tls_type = TLS_TLS | TLS_LD;
8556 break;
8557
8558 case R_PPC64_GOT_TLSGD16:
8559 case R_PPC64_GOT_TLSGD16_LO:
8560 expecting_tls_get_addr = 1;
8561 found_tls_get_addr_arg = 1;
8562 /* Fall through. */
8563
8564 case R_PPC64_GOT_TLSGD16_HI:
8565 case R_PPC64_GOT_TLSGD16_HA:
8566 if (ok_tprel)
8567 /* GD -> LE */
8568 tls_set = 0;
8569 else
8570 /* GD -> IE */
8571 tls_set = TLS_TLS | TLS_TPRELGD;
8572 tls_clear = TLS_GD;
8573 tls_type = TLS_TLS | TLS_GD;
8574 break;
8575
8576 case R_PPC64_GOT_TPREL16_DS:
8577 case R_PPC64_GOT_TPREL16_LO_DS:
8578 case R_PPC64_GOT_TPREL16_HI:
8579 case R_PPC64_GOT_TPREL16_HA:
8580 if (ok_tprel)
8581 {
8582 /* IE -> LE */
8583 tls_set = 0;
8584 tls_clear = TLS_TPREL;
8585 tls_type = TLS_TLS | TLS_TPREL;
8586 break;
8587 }
8588 continue;
8589
8590 case R_PPC64_TLSGD:
8591 case R_PPC64_TLSLD:
8592 found_tls_get_addr_arg = 1;
8593 /* Fall through. */
8594
8595 case R_PPC64_TLS:
8596 case R_PPC64_TOC16:
8597 case R_PPC64_TOC16_LO:
8598 if (sym_sec == NULL || sym_sec != toc)
8599 continue;
8600
8601 /* Mark this toc entry as referenced by a TLS
8602 code sequence. We can do that now in the
8603 case of R_PPC64_TLS, and after checking for
8604 tls_get_addr for the TOC16 relocs. */
8605 if (toc_ref == NULL)
8606 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8607 if (toc_ref == NULL)
8608 goto err_free_rel;
8609
8610 if (h != NULL)
8611 value = h->root.u.def.value;
8612 else
8613 value = sym->st_value;
8614 value += rel->r_addend;
8615 if (value % 8 != 0)
8616 continue;
8617 BFD_ASSERT (value < toc->size
8618 && toc->output_offset % 8 == 0);
8619 toc_ref_index = (value + toc->output_offset) / 8;
8620 if (r_type == R_PPC64_TLS
8621 || r_type == R_PPC64_TLSGD
8622 || r_type == R_PPC64_TLSLD)
8623 {
8624 toc_ref[toc_ref_index] = 1;
8625 continue;
8626 }
8627
8628 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8629 continue;
8630
8631 tls_set = 0;
8632 tls_clear = 0;
8633 expecting_tls_get_addr = 2;
8634 break;
8635
8636 case R_PPC64_TPREL64:
8637 if (pass == 0
8638 || sec != toc
8639 || toc_ref == NULL
8640 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8641 continue;
8642 if (ok_tprel)
8643 {
8644 /* IE -> LE */
8645 tls_set = TLS_EXPLICIT;
8646 tls_clear = TLS_TPREL;
8647 break;
8648 }
8649 continue;
8650
8651 case R_PPC64_DTPMOD64:
8652 if (pass == 0
8653 || sec != toc
8654 || toc_ref == NULL
8655 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8656 continue;
8657 if (rel + 1 < relend
8658 && (rel[1].r_info
8659 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8660 && rel[1].r_offset == rel->r_offset + 8)
8661 {
8662 if (ok_tprel)
8663 /* GD -> LE */
8664 tls_set = TLS_EXPLICIT | TLS_GD;
8665 else
8666 /* GD -> IE */
8667 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8668 tls_clear = TLS_GD;
8669 }
8670 else
8671 {
8672 if (!is_local)
8673 continue;
8674
8675 /* LD -> LE */
8676 tls_set = TLS_EXPLICIT;
8677 tls_clear = TLS_LD;
8678 }
8679 break;
8680
8681 default:
8682 continue;
8683 }
8684
8685 if (pass == 0)
8686 {
8687 if (!expecting_tls_get_addr
8688 || !sec->has_tls_get_addr_call)
8689 continue;
8690
8691 if (rel + 1 < relend
8692 && branch_reloc_hash_match (ibfd, rel + 1,
8693 htab->tls_get_addr,
8694 htab->tls_get_addr_fd))
8695 {
8696 if (expecting_tls_get_addr == 2)
8697 {
8698 /* Check for toc tls entries. */
8699 unsigned char *toc_tls;
8700 int retval;
8701
8702 retval = get_tls_mask (&toc_tls, NULL, NULL,
8703 &locsyms,
8704 rel, ibfd);
8705 if (retval == 0)
8706 goto err_free_rel;
8707 if (toc_tls != NULL)
8708 {
8709 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8710 found_tls_get_addr_arg = 1;
8711 if (retval > 1)
8712 toc_ref[toc_ref_index] = 1;
8713 }
8714 }
8715 continue;
8716 }
8717
8718 if (expecting_tls_get_addr != 1)
8719 continue;
8720
8721 /* Uh oh, we didn't find the expected call. We
8722 could just mark this symbol to exclude it
8723 from tls optimization but it's safer to skip
8724 the entire optimization. */
8725 /* xgettext:c-format */
8726 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8727 "TLS optimization disabled\n"),
8728 ibfd, sec, rel->r_offset);
8729 ret = TRUE;
8730 goto err_free_rel;
8731 }
8732
8733 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8734 {
8735 struct plt_entry *ent;
8736 for (ent = htab->tls_get_addr->elf.plt.plist;
8737 ent != NULL;
8738 ent = ent->next)
8739 if (ent->addend == 0)
8740 {
8741 if (ent->plt.refcount > 0)
8742 {
8743 ent->plt.refcount -= 1;
8744 expecting_tls_get_addr = 0;
8745 }
8746 break;
8747 }
8748 }
8749
8750 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8751 {
8752 struct plt_entry *ent;
8753 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8754 ent != NULL;
8755 ent = ent->next)
8756 if (ent->addend == 0)
8757 {
8758 if (ent->plt.refcount > 0)
8759 ent->plt.refcount -= 1;
8760 break;
8761 }
8762 }
8763
8764 if (tls_clear == 0)
8765 continue;
8766
8767 if ((tls_set & TLS_EXPLICIT) == 0)
8768 {
8769 struct got_entry *ent;
8770
8771 /* Adjust got entry for this reloc. */
8772 if (h != NULL)
8773 ent = h->got.glist;
8774 else
8775 ent = elf_local_got_ents (ibfd)[r_symndx];
8776
8777 for (; ent != NULL; ent = ent->next)
8778 if (ent->addend == rel->r_addend
8779 && ent->owner == ibfd
8780 && ent->tls_type == tls_type)
8781 break;
8782 if (ent == NULL)
8783 abort ();
8784
8785 if (tls_set == 0)
8786 {
8787 /* We managed to get rid of a got entry. */
8788 if (ent->got.refcount > 0)
8789 ent->got.refcount -= 1;
8790 }
8791 }
8792 else
8793 {
8794 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8795 we'll lose one or two dyn relocs. */
8796 if (!dec_dynrel_count (rel->r_info, sec, info,
8797 NULL, h, sym))
8798 return FALSE;
8799
8800 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8801 {
8802 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8803 NULL, h, sym))
8804 return FALSE;
8805 }
8806 }
8807
8808 *tls_mask |= tls_set;
8809 *tls_mask &= ~tls_clear;
8810 }
8811
8812 if (elf_section_data (sec)->relocs != relstart)
8813 free (relstart);
8814 }
8815
8816 if (locsyms != NULL
8817 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8818 {
8819 if (!info->keep_memory)
8820 free (locsyms);
8821 else
8822 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8823 }
8824 }
8825
8826 if (toc_ref != NULL)
8827 free (toc_ref);
8828 return TRUE;
8829}
8830
8831/* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8832 the values of any global symbols in a toc section that has been
8833 edited. Globals in toc sections should be a rarity, so this function
8834 sets a flag if any are found in toc sections other than the one just
8835 edited, so that futher hash table traversals can be avoided. */
8836
8837struct adjust_toc_info
8838{
8839 asection *toc;
8840 unsigned long *skip;
8841 bfd_boolean global_toc_syms;
8842};
8843
8844enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8845
8846static bfd_boolean
8847adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8848{
8849 struct ppc_link_hash_entry *eh;
8850 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8851 unsigned long i;
8852
8853 if (h->root.type != bfd_link_hash_defined
8854 && h->root.type != bfd_link_hash_defweak)
8855 return TRUE;
8856
8857 eh = (struct ppc_link_hash_entry *) h;
8858 if (eh->adjust_done)
8859 return TRUE;
8860
8861 if (eh->elf.root.u.def.section == toc_inf->toc)
8862 {
8863 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8864 i = toc_inf->toc->rawsize >> 3;
8865 else
8866 i = eh->elf.root.u.def.value >> 3;
8867
8868 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8869 {
8870 _bfd_error_handler
8871 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8872 do
8873 ++i;
8874 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8875 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8876 }
8877
8878 eh->elf.root.u.def.value -= toc_inf->skip[i];
8879 eh->adjust_done = 1;
8880 }
8881 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8882 toc_inf->global_toc_syms = TRUE;
8883
8884 return TRUE;
8885}
8886
8887/* Return TRUE iff INSN with a relocation of R_TYPE is one we expect
8888 on a _LO variety toc/got reloc. */
8889
8890static bfd_boolean
8891ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type)
8892{
8893 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
8894 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
8895 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8896 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8897 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8898 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8899 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8900 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8901 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8902 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8903 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8904 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8905 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8906 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8907 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8908 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
8909 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
8910 /* Exclude lfqu by testing reloc. If relocs are ever
8911 defined for the reduced D field in psq_lu then those
8912 will need testing too. */
8913 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8914 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
8915 && (insn & 1) == 0)
8916 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
8917 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
8918 /* Exclude stfqu. psq_stu as above for psq_lu. */
8919 && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO)
8920 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
8921 && (insn & 1) == 0));
8922}
8923
8924/* Examine all relocs referencing .toc sections in order to remove
8925 unused .toc entries. */
8926
8927bfd_boolean
8928ppc64_elf_edit_toc (struct bfd_link_info *info)
8929{
8930 bfd *ibfd;
8931 struct adjust_toc_info toc_inf;
8932 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8933
8934 htab->do_toc_opt = 1;
8935 toc_inf.global_toc_syms = TRUE;
8936 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8937 {
8938 asection *toc, *sec;
8939 Elf_Internal_Shdr *symtab_hdr;
8940 Elf_Internal_Sym *local_syms;
8941 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8942 unsigned long *skip, *drop;
8943 unsigned char *used;
8944 unsigned char *keep, last, some_unused;
8945
8946 if (!is_ppc64_elf (ibfd))
8947 continue;
8948
8949 toc = bfd_get_section_by_name (ibfd, ".toc");
8950 if (toc == NULL
8951 || toc->size == 0
8952 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8953 || discarded_section (toc))
8954 continue;
8955
8956 toc_relocs = NULL;
8957 local_syms = NULL;
8958 symtab_hdr = &elf_symtab_hdr (ibfd);
8959
8960 /* Look at sections dropped from the final link. */
8961 skip = NULL;
8962 relstart = NULL;
8963 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8964 {
8965 if (sec->reloc_count == 0
8966 || !discarded_section (sec)
8967 || get_opd_info (sec)
8968 || (sec->flags & SEC_ALLOC) == 0
8969 || (sec->flags & SEC_DEBUGGING) != 0)
8970 continue;
8971
8972 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8973 if (relstart == NULL)
8974 goto error_ret;
8975
8976 /* Run through the relocs to see which toc entries might be
8977 unused. */
8978 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8979 {
8980 enum elf_ppc64_reloc_type r_type;
8981 unsigned long r_symndx;
8982 asection *sym_sec;
8983 struct elf_link_hash_entry *h;
8984 Elf_Internal_Sym *sym;
8985 bfd_vma val;
8986
8987 r_type = ELF64_R_TYPE (rel->r_info);
8988 switch (r_type)
8989 {
8990 default:
8991 continue;
8992
8993 case R_PPC64_TOC16:
8994 case R_PPC64_TOC16_LO:
8995 case R_PPC64_TOC16_HI:
8996 case R_PPC64_TOC16_HA:
8997 case R_PPC64_TOC16_DS:
8998 case R_PPC64_TOC16_LO_DS:
8999 break;
9000 }
9001
9002 r_symndx = ELF64_R_SYM (rel->r_info);
9003 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9004 r_symndx, ibfd))
9005 goto error_ret;
9006
9007 if (sym_sec != toc)
9008 continue;
9009
9010 if (h != NULL)
9011 val = h->root.u.def.value;
9012 else
9013 val = sym->st_value;
9014 val += rel->r_addend;
9015
9016 if (val >= toc->size)
9017 continue;
9018
9019 /* Anything in the toc ought to be aligned to 8 bytes.
9020 If not, don't mark as unused. */
9021 if (val & 7)
9022 continue;
9023
9024 if (skip == NULL)
9025 {
9026 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9027 if (skip == NULL)
9028 goto error_ret;
9029 }
9030
9031 skip[val >> 3] = ref_from_discarded;
9032 }
9033
9034 if (elf_section_data (sec)->relocs != relstart)
9035 free (relstart);
9036 }
9037
9038 /* For largetoc loads of address constants, we can convert
9039 . addis rx,2,addr@got@ha
9040 . ld ry,addr@got@l(rx)
9041 to
9042 . addis rx,2,addr@toc@ha
9043 . addi ry,rx,addr@toc@l
9044 when addr is within 2G of the toc pointer. This then means
9045 that the word storing "addr" in the toc is no longer needed. */
9046
9047 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
9048 && toc->output_section->rawsize < (bfd_vma) 1 << 31
9049 && toc->reloc_count != 0)
9050 {
9051 /* Read toc relocs. */
9052 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9053 info->keep_memory);
9054 if (toc_relocs == NULL)
9055 goto error_ret;
9056
9057 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9058 {
9059 enum elf_ppc64_reloc_type r_type;
9060 unsigned long r_symndx;
9061 asection *sym_sec;
9062 struct elf_link_hash_entry *h;
9063 Elf_Internal_Sym *sym;
9064 bfd_vma val, addr;
9065
9066 r_type = ELF64_R_TYPE (rel->r_info);
9067 if (r_type != R_PPC64_ADDR64)
9068 continue;
9069
9070 r_symndx = ELF64_R_SYM (rel->r_info);
9071 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9072 r_symndx, ibfd))
9073 goto error_ret;
9074
9075 if (sym_sec == NULL
9076 || sym_sec->output_section == NULL
9077 || discarded_section (sym_sec))
9078 continue;
9079
9080 if (!SYMBOL_REFERENCES_LOCAL (info, h))
9081 continue;
9082
9083 if (h != NULL)
9084 {
9085 if (h->type == STT_GNU_IFUNC)
9086 continue;
9087 val = h->root.u.def.value;
9088 }
9089 else
9090 {
9091 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
9092 continue;
9093 val = sym->st_value;
9094 }
9095 val += rel->r_addend;
9096 val += sym_sec->output_section->vma + sym_sec->output_offset;
9097
9098 /* We don't yet know the exact toc pointer value, but we
9099 know it will be somewhere in the toc section. Don't
9100 optimize if the difference from any possible toc
9101 pointer is outside [ff..f80008000, 7fff7fff]. */
9102 addr = toc->output_section->vma + TOC_BASE_OFF;
9103 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9104 continue;
9105
9106 addr = toc->output_section->vma + toc->output_section->rawsize;
9107 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
9108 continue;
9109
9110 if (skip == NULL)
9111 {
9112 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
9113 if (skip == NULL)
9114 goto error_ret;
9115 }
9116
9117 skip[rel->r_offset >> 3]
9118 |= can_optimize | ((rel - toc_relocs) << 2);
9119 }
9120 }
9121
9122 if (skip == NULL)
9123 continue;
9124
9125 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
9126 if (used == NULL)
9127 {
9128 error_ret:
9129 if (local_syms != NULL
9130 && symtab_hdr->contents != (unsigned char *) local_syms)
9131 free (local_syms);
9132 if (sec != NULL
9133 && relstart != NULL
9134 && elf_section_data (sec)->relocs != relstart)
9135 free (relstart);
9136 if (toc_relocs != NULL
9137 && elf_section_data (toc)->relocs != toc_relocs)
9138 free (toc_relocs);
9139 if (skip != NULL)
9140 free (skip);
9141 return FALSE;
9142 }
9143
9144 /* Now check all kept sections that might reference the toc.
9145 Check the toc itself last. */
9146 for (sec = (ibfd->sections == toc && toc->next ? toc->next
9147 : ibfd->sections);
9148 sec != NULL;
9149 sec = (sec == toc ? NULL
9150 : sec->next == NULL ? toc
9151 : sec->next == toc && toc->next ? toc->next
9152 : sec->next))
9153 {
9154 int repeat;
9155
9156 if (sec->reloc_count == 0
9157 || discarded_section (sec)
9158 || get_opd_info (sec)
9159 || (sec->flags & SEC_ALLOC) == 0
9160 || (sec->flags & SEC_DEBUGGING) != 0)
9161 continue;
9162
9163 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9164 info->keep_memory);
9165 if (relstart == NULL)
9166 {
9167 free (used);
9168 goto error_ret;
9169 }
9170
9171 /* Mark toc entries referenced as used. */
9172 do
9173 {
9174 repeat = 0;
9175 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9176 {
9177 enum elf_ppc64_reloc_type r_type;
9178 unsigned long r_symndx;
9179 asection *sym_sec;
9180 struct elf_link_hash_entry *h;
9181 Elf_Internal_Sym *sym;
9182 bfd_vma val;
9183 enum {no_check, check_lo, check_ha} insn_check;
9184
9185 r_type = ELF64_R_TYPE (rel->r_info);
9186 switch (r_type)
9187 {
9188 default:
9189 insn_check = no_check;
9190 break;
9191
9192 case R_PPC64_GOT_TLSLD16_HA:
9193 case R_PPC64_GOT_TLSGD16_HA:
9194 case R_PPC64_GOT_TPREL16_HA:
9195 case R_PPC64_GOT_DTPREL16_HA:
9196 case R_PPC64_GOT16_HA:
9197 case R_PPC64_TOC16_HA:
9198 insn_check = check_ha;
9199 break;
9200
9201 case R_PPC64_GOT_TLSLD16_LO:
9202 case R_PPC64_GOT_TLSGD16_LO:
9203 case R_PPC64_GOT_TPREL16_LO_DS:
9204 case R_PPC64_GOT_DTPREL16_LO_DS:
9205 case R_PPC64_GOT16_LO:
9206 case R_PPC64_GOT16_LO_DS:
9207 case R_PPC64_TOC16_LO:
9208 case R_PPC64_TOC16_LO_DS:
9209 insn_check = check_lo;
9210 break;
9211 }
9212
9213 if (insn_check != no_check)
9214 {
9215 bfd_vma off = rel->r_offset & ~3;
9216 unsigned char buf[4];
9217 unsigned int insn;
9218
9219 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
9220 {
9221 free (used);
9222 goto error_ret;
9223 }
9224 insn = bfd_get_32 (ibfd, buf);
9225 if (insn_check == check_lo
9226 ? !ok_lo_toc_insn (insn, r_type)
9227 : ((insn & ((0x3f << 26) | 0x1f << 16))
9228 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
9229 {
9230 char str[12];
9231
9232 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
9233 sprintf (str, "%#08x", insn);
9234 info->callbacks->einfo
9235 /* xgettext:c-format */
9236 (_("%P: %H: toc optimization is not supported for"
9237 " %s instruction.\n"),
9238 ibfd, sec, rel->r_offset & ~3, str);
9239 }
9240 }
9241
9242 switch (r_type)
9243 {
9244 case R_PPC64_TOC16:
9245 case R_PPC64_TOC16_LO:
9246 case R_PPC64_TOC16_HI:
9247 case R_PPC64_TOC16_HA:
9248 case R_PPC64_TOC16_DS:
9249 case R_PPC64_TOC16_LO_DS:
9250 /* In case we're taking addresses of toc entries. */
9251 case R_PPC64_ADDR64:
9252 break;
9253
9254 default:
9255 continue;
9256 }
9257
9258 r_symndx = ELF64_R_SYM (rel->r_info);
9259 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9260 r_symndx, ibfd))
9261 {
9262 free (used);
9263 goto error_ret;
9264 }
9265
9266 if (sym_sec != toc)
9267 continue;
9268
9269 if (h != NULL)
9270 val = h->root.u.def.value;
9271 else
9272 val = sym->st_value;
9273 val += rel->r_addend;
9274
9275 if (val >= toc->size)
9276 continue;
9277
9278 if ((skip[val >> 3] & can_optimize) != 0)
9279 {
9280 bfd_vma off;
9281 unsigned char opc;
9282
9283 switch (r_type)
9284 {
9285 case R_PPC64_TOC16_HA:
9286 break;
9287
9288 case R_PPC64_TOC16_LO_DS:
9289 off = rel->r_offset;
9290 off += (bfd_big_endian (ibfd) ? -2 : 3);
9291 if (!bfd_get_section_contents (ibfd, sec, &opc,
9292 off, 1))
9293 {
9294 free (used);
9295 goto error_ret;
9296 }
9297 if ((opc & (0x3f << 2)) == (58u << 2))
9298 break;
9299 /* Fall through. */
9300
9301 default:
9302 /* Wrong sort of reloc, or not a ld. We may
9303 as well clear ref_from_discarded too. */
9304 skip[val >> 3] = 0;
9305 }
9306 }
9307
9308 if (sec != toc)
9309 used[val >> 3] = 1;
9310 /* For the toc section, we only mark as used if this
9311 entry itself isn't unused. */
9312 else if ((used[rel->r_offset >> 3]
9313 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
9314 && !used[val >> 3])
9315 {
9316 /* Do all the relocs again, to catch reference
9317 chains. */
9318 repeat = 1;
9319 used[val >> 3] = 1;
9320 }
9321 }
9322 }
9323 while (repeat);
9324
9325 if (elf_section_data (sec)->relocs != relstart)
9326 free (relstart);
9327 }
9328
9329 /* Merge the used and skip arrays. Assume that TOC
9330 doublewords not appearing as either used or unused belong
9331 to to an entry more than one doubleword in size. */
9332 for (drop = skip, keep = used, last = 0, some_unused = 0;
9333 drop < skip + (toc->size + 7) / 8;
9334 ++drop, ++keep)
9335 {
9336 if (*keep)
9337 {
9338 *drop &= ~ref_from_discarded;
9339 if ((*drop & can_optimize) != 0)
9340 some_unused = 1;
9341 last = 0;
9342 }
9343 else if ((*drop & ref_from_discarded) != 0)
9344 {
9345 some_unused = 1;
9346 last = ref_from_discarded;
9347 }
9348 else
9349 *drop = last;
9350 }
9351
9352 free (used);
9353
9354 if (some_unused)
9355 {
9356 bfd_byte *contents, *src;
9357 unsigned long off;
9358 Elf_Internal_Sym *sym;
9359 bfd_boolean local_toc_syms = FALSE;
9360
9361 /* Shuffle the toc contents, and at the same time convert the
9362 skip array from booleans into offsets. */
9363 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
9364 goto error_ret;
9365
9366 elf_section_data (toc)->this_hdr.contents = contents;
9367
9368 for (src = contents, off = 0, drop = skip;
9369 src < contents + toc->size;
9370 src += 8, ++drop)
9371 {
9372 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
9373 off += 8;
9374 else if (off != 0)
9375 {
9376 *drop = off;
9377 memcpy (src - off, src, 8);
9378 }
9379 }
9380 *drop = off;
9381 toc->rawsize = toc->size;
9382 toc->size = src - contents - off;
9383
9384 /* Adjust addends for relocs against the toc section sym,
9385 and optimize any accesses we can. */
9386 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
9387 {
9388 if (sec->reloc_count == 0
9389 || discarded_section (sec))
9390 continue;
9391
9392 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
9393 info->keep_memory);
9394 if (relstart == NULL)
9395 goto error_ret;
9396
9397 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
9398 {
9399 enum elf_ppc64_reloc_type r_type;
9400 unsigned long r_symndx;
9401 asection *sym_sec;
9402 struct elf_link_hash_entry *h;
9403 bfd_vma val;
9404
9405 r_type = ELF64_R_TYPE (rel->r_info);
9406 switch (r_type)
9407 {
9408 default:
9409 continue;
9410
9411 case R_PPC64_TOC16:
9412 case R_PPC64_TOC16_LO:
9413 case R_PPC64_TOC16_HI:
9414 case R_PPC64_TOC16_HA:
9415 case R_PPC64_TOC16_DS:
9416 case R_PPC64_TOC16_LO_DS:
9417 case R_PPC64_ADDR64:
9418 break;
9419 }
9420
9421 r_symndx = ELF64_R_SYM (rel->r_info);
9422 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9423 r_symndx, ibfd))
9424 goto error_ret;
9425
9426 if (sym_sec != toc)
9427 continue;
9428
9429 if (h != NULL)
9430 val = h->root.u.def.value;
9431 else
9432 {
9433 val = sym->st_value;
9434 if (val != 0)
9435 local_toc_syms = TRUE;
9436 }
9437
9438 val += rel->r_addend;
9439
9440 if (val > toc->rawsize)
9441 val = toc->rawsize;
9442 else if ((skip[val >> 3] & ref_from_discarded) != 0)
9443 continue;
9444 else if ((skip[val >> 3] & can_optimize) != 0)
9445 {
9446 Elf_Internal_Rela *tocrel
9447 = toc_relocs + (skip[val >> 3] >> 2);
9448 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
9449
9450 switch (r_type)
9451 {
9452 case R_PPC64_TOC16_HA:
9453 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
9454 break;
9455
9456 case R_PPC64_TOC16_LO_DS:
9457 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
9458 break;
9459
9460 default:
9461 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9462 ppc_howto_init ();
9463 info->callbacks->einfo
9464 /* xgettext:c-format */
9465 (_("%P: %H: %s references "
9466 "optimized away TOC entry\n"),
9467 ibfd, sec, rel->r_offset,
9468 ppc64_elf_howto_table[r_type]->name);
9469 bfd_set_error (bfd_error_bad_value);
9470 goto error_ret;
9471 }
9472 rel->r_addend = tocrel->r_addend;
9473 elf_section_data (sec)->relocs = relstart;
9474 continue;
9475 }
9476
9477 if (h != NULL || sym->st_value != 0)
9478 continue;
9479
9480 rel->r_addend -= skip[val >> 3];
9481 elf_section_data (sec)->relocs = relstart;
9482 }
9483
9484 if (elf_section_data (sec)->relocs != relstart)
9485 free (relstart);
9486 }
9487
9488 /* We shouldn't have local or global symbols defined in the TOC,
9489 but handle them anyway. */
9490 if (local_syms != NULL)
9491 for (sym = local_syms;
9492 sym < local_syms + symtab_hdr->sh_info;
9493 ++sym)
9494 if (sym->st_value != 0
9495 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
9496 {
9497 unsigned long i;
9498
9499 if (sym->st_value > toc->rawsize)
9500 i = toc->rawsize >> 3;
9501 else
9502 i = sym->st_value >> 3;
9503
9504 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
9505 {
9506 if (local_toc_syms)
9507 _bfd_error_handler
9508 (_("%s defined on removed toc entry"),
9509 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
9510 do
9511 ++i;
9512 while ((skip[i] & (ref_from_discarded | can_optimize)));
9513 sym->st_value = (bfd_vma) i << 3;
9514 }
9515
9516 sym->st_value -= skip[i];
9517 symtab_hdr->contents = (unsigned char *) local_syms;
9518 }
9519
9520 /* Adjust any global syms defined in this toc input section. */
9521 if (toc_inf.global_toc_syms)
9522 {
9523 toc_inf.toc = toc;
9524 toc_inf.skip = skip;
9525 toc_inf.global_toc_syms = FALSE;
9526 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
9527 &toc_inf);
9528 }
9529
9530 if (toc->reloc_count != 0)
9531 {
9532 Elf_Internal_Shdr *rel_hdr;
9533 Elf_Internal_Rela *wrel;
9534 bfd_size_type sz;
9535
9536 /* Remove unused toc relocs, and adjust those we keep. */
9537 if (toc_relocs == NULL)
9538 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
9539 info->keep_memory);
9540 if (toc_relocs == NULL)
9541 goto error_ret;
9542
9543 wrel = toc_relocs;
9544 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
9545 if ((skip[rel->r_offset >> 3]
9546 & (ref_from_discarded | can_optimize)) == 0)
9547 {
9548 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
9549 wrel->r_info = rel->r_info;
9550 wrel->r_addend = rel->r_addend;
9551 ++wrel;
9552 }
9553 else if (!dec_dynrel_count (rel->r_info, toc, info,
9554 &local_syms, NULL, NULL))
9555 goto error_ret;
9556
9557 elf_section_data (toc)->relocs = toc_relocs;
9558 toc->reloc_count = wrel - toc_relocs;
9559 rel_hdr = _bfd_elf_single_rel_hdr (toc);
9560 sz = rel_hdr->sh_entsize;
9561 rel_hdr->sh_size = toc->reloc_count * sz;
9562 }
9563 }
9564 else if (toc_relocs != NULL
9565 && elf_section_data (toc)->relocs != toc_relocs)
9566 free (toc_relocs);
9567
9568 if (local_syms != NULL
9569 && symtab_hdr->contents != (unsigned char *) local_syms)
9570 {
9571 if (!info->keep_memory)
9572 free (local_syms);
9573 else
9574 symtab_hdr->contents = (unsigned char *) local_syms;
9575 }
9576 free (skip);
9577 }
9578
9579 return TRUE;
9580}
9581
9582/* Return true iff input section I references the TOC using
9583 instructions limited to +/-32k offsets. */
9584
9585bfd_boolean
9586ppc64_elf_has_small_toc_reloc (asection *i)
9587{
9588 return (is_ppc64_elf (i->owner)
9589 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9590}
9591
9592/* Allocate space for one GOT entry. */
9593
9594static void
9595allocate_got (struct elf_link_hash_entry *h,
9596 struct bfd_link_info *info,
9597 struct got_entry *gent)
9598{
9599 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9600 bfd_boolean dyn;
9601 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9602 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9603 ? 16 : 8);
9604 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9605 ? 2 : 1) * sizeof (Elf64_External_Rela);
9606 asection *got = ppc64_elf_tdata (gent->owner)->got;
9607
9608 gent->got.offset = got->size;
9609 got->size += entsize;
9610
9611 dyn = htab->elf.dynamic_sections_created;
9612 if (h->type == STT_GNU_IFUNC)
9613 {
9614 htab->elf.irelplt->size += rentsize;
9615 htab->got_reli_size += rentsize;
9616 }
9617 else if ((bfd_link_pic (info)
9618 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9619 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9620 || h->root.type != bfd_link_hash_undefweak))
9621 {
9622 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9623 relgot->size += rentsize;
9624 }
9625}
9626
9627/* This function merges got entries in the same toc group. */
9628
9629static void
9630merge_got_entries (struct got_entry **pent)
9631{
9632 struct got_entry *ent, *ent2;
9633
9634 for (ent = *pent; ent != NULL; ent = ent->next)
9635 if (!ent->is_indirect)
9636 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9637 if (!ent2->is_indirect
9638 && ent2->addend == ent->addend
9639 && ent2->tls_type == ent->tls_type
9640 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9641 {
9642 ent2->is_indirect = TRUE;
9643 ent2->got.ent = ent;
9644 }
9645}
9646
9647/* Allocate space in .plt, .got and associated reloc sections for
9648 dynamic relocs. */
9649
9650static bfd_boolean
9651allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9652{
9653 struct bfd_link_info *info;
9654 struct ppc_link_hash_table *htab;
9655 asection *s;
9656 struct ppc_link_hash_entry *eh;
9657 struct got_entry **pgent, *gent;
9658
9659 if (h->root.type == bfd_link_hash_indirect)
9660 return TRUE;
9661
9662 info = (struct bfd_link_info *) inf;
9663 htab = ppc_hash_table (info);
9664 if (htab == NULL)
9665 return FALSE;
9666
9667 eh = (struct ppc_link_hash_entry *) h;
9668 /* Run through the TLS GD got entries first if we're changing them
9669 to TPREL. */
9670 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9671 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9672 if (gent->got.refcount > 0
9673 && (gent->tls_type & TLS_GD) != 0)
9674 {
9675 /* This was a GD entry that has been converted to TPREL. If
9676 there happens to be a TPREL entry we can use that one. */
9677 struct got_entry *ent;
9678 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9679 if (ent->got.refcount > 0
9680 && (ent->tls_type & TLS_TPREL) != 0
9681 && ent->addend == gent->addend
9682 && ent->owner == gent->owner)
9683 {
9684 gent->got.refcount = 0;
9685 break;
9686 }
9687
9688 /* If not, then we'll be using our own TPREL entry. */
9689 if (gent->got.refcount != 0)
9690 gent->tls_type = TLS_TLS | TLS_TPREL;
9691 }
9692
9693 /* Remove any list entry that won't generate a word in the GOT before
9694 we call merge_got_entries. Otherwise we risk merging to empty
9695 entries. */
9696 pgent = &h->got.glist;
9697 while ((gent = *pgent) != NULL)
9698 if (gent->got.refcount > 0)
9699 {
9700 if ((gent->tls_type & TLS_LD) != 0
9701 && !h->def_dynamic)
9702 {
9703 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9704 *pgent = gent->next;
9705 }
9706 else
9707 pgent = &gent->next;
9708 }
9709 else
9710 *pgent = gent->next;
9711
9712 if (!htab->do_multi_toc)
9713 merge_got_entries (&h->got.glist);
9714
9715 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9716 if (!gent->is_indirect)
9717 {
9718 /* Make sure this symbol is output as a dynamic symbol.
9719 Undefined weak syms won't yet be marked as dynamic,
9720 nor will all TLS symbols. */
9721 if (h->dynindx == -1
9722 && !h->forced_local
9723 && h->type != STT_GNU_IFUNC
9724 && htab->elf.dynamic_sections_created)
9725 {
9726 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9727 return FALSE;
9728 }
9729
9730 if (!is_ppc64_elf (gent->owner))
9731 abort ();
9732
9733 allocate_got (h, info, gent);
9734 }
9735
9736 if (!htab->elf.dynamic_sections_created
9737 && h->type != STT_GNU_IFUNC)
9738 eh->dyn_relocs = NULL;
9739
9740 if (eh->dyn_relocs != NULL)
9741 {
9742 struct elf_dyn_relocs *p, **pp;
9743
9744 /* In the shared -Bsymbolic case, discard space allocated for
9745 dynamic pc-relative relocs against symbols which turn out to
9746 be defined in regular objects. For the normal shared case,
9747 discard space for relocs that have become local due to symbol
9748 visibility changes. */
9749
9750 if (bfd_link_pic (info))
9751 {
9752 /* Relocs that use pc_count are those that appear on a call
9753 insn, or certain REL relocs (see must_be_dyn_reloc) that
9754 can be generated via assembly. We want calls to
9755 protected symbols to resolve directly to the function
9756 rather than going via the plt. If people want function
9757 pointer comparisons to work as expected then they should
9758 avoid writing weird assembly. */
9759 if (SYMBOL_CALLS_LOCAL (info, h))
9760 {
9761 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9762 {
9763 p->count -= p->pc_count;
9764 p->pc_count = 0;
9765 if (p->count == 0)
9766 *pp = p->next;
9767 else
9768 pp = &p->next;
9769 }
9770 }
9771
9772 /* Also discard relocs on undefined weak syms with
9773 non-default visibility. */
9774 if (eh->dyn_relocs != NULL
9775 && h->root.type == bfd_link_hash_undefweak)
9776 {
9777 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9778 eh->dyn_relocs = NULL;
9779
9780 /* Make sure this symbol is output as a dynamic symbol.
9781 Undefined weak syms won't yet be marked as dynamic. */
9782 else if (h->dynindx == -1
9783 && !h->forced_local)
9784 {
9785 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9786 return FALSE;
9787 }
9788 }
9789 }
9790 else if (h->type == STT_GNU_IFUNC)
9791 {
9792 /* A plt entry is always created when making direct calls to
9793 an ifunc, even when building a static executable, but
9794 that doesn't cover all cases. We may have only an ifunc
9795 initialised function pointer for a given ifunc symbol.
9796
9797 For ELFv2, dynamic relocations are not required when
9798 generating a global entry PLT stub. */
9799 if (abiversion (info->output_bfd) >= 2)
9800 {
9801 if (global_entry_stub (h))
9802 eh->dyn_relocs = NULL;
9803 }
9804
9805 /* For ELFv1 we have function descriptors. Descriptors need
9806 to be treated like PLT entries and thus have dynamic
9807 relocations. One exception is when the function
9808 descriptor is copied into .dynbss (which should only
9809 happen with ancient versions of gcc). */
9810 else if (h->needs_copy)
9811 eh->dyn_relocs = NULL;
9812 }
9813 else if (ELIMINATE_COPY_RELOCS)
9814 {
9815 /* For the non-pic case, discard space for relocs against
9816 symbols which turn out to need copy relocs or are not
9817 dynamic. */
9818
9819 /* First make sure this symbol is output as a dynamic symbol.
9820 Undefined weak syms won't yet be marked as dynamic. */
9821 if (h->root.type == bfd_link_hash_undefweak
9822 && !h->non_got_ref
9823 && !h->def_regular
9824 && h->dynindx == -1
9825 && !h->forced_local
9826 && !bfd_elf_link_record_dynamic_symbol (info, h))
9827 return FALSE;
9828
9829 if (h->non_got_ref
9830 || h->def_regular
9831 || h->dynindx == -1)
9832 eh->dyn_relocs = NULL;
9833 }
9834
9835 /* Finally, allocate space. */
9836 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9837 {
9838 asection *sreloc = elf_section_data (p->sec)->sreloc;
9839 if (eh->elf.type == STT_GNU_IFUNC)
9840 sreloc = htab->elf.irelplt;
9841 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9842 }
9843 }
9844
9845 if ((htab->elf.dynamic_sections_created
9846 && h->dynindx != -1
9847 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
9848 || h->type == STT_GNU_IFUNC)
9849 {
9850 struct plt_entry *pent;
9851 bfd_boolean doneone = FALSE;
9852 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9853 if (pent->plt.refcount > 0)
9854 {
9855 if (!htab->elf.dynamic_sections_created
9856 || h->dynindx == -1)
9857 {
9858 s = htab->elf.iplt;
9859 pent->plt.offset = s->size;
9860 s->size += PLT_ENTRY_SIZE (htab);
9861 s = htab->elf.irelplt;
9862 }
9863 else
9864 {
9865 /* If this is the first .plt entry, make room for the special
9866 first entry. */
9867 s = htab->elf.splt;
9868 if (s->size == 0)
9869 s->size += PLT_INITIAL_ENTRY_SIZE (htab);
9870
9871 pent->plt.offset = s->size;
9872
9873 /* Make room for this entry. */
9874 s->size += PLT_ENTRY_SIZE (htab);
9875
9876 /* Make room for the .glink code. */
9877 s = htab->glink;
9878 if (s->size == 0)
9879 s->size += GLINK_CALL_STUB_SIZE;
9880 if (htab->opd_abi)
9881 {
9882 /* We need bigger stubs past index 32767. */
9883 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9884 s->size += 4;
9885 s->size += 2*4;
9886 }
9887 else
9888 s->size += 4;
9889
9890 /* We also need to make an entry in the .rela.plt section. */
9891 s = htab->elf.srelplt;
9892 }
9893 s->size += sizeof (Elf64_External_Rela);
9894 doneone = TRUE;
9895 }
9896 else
9897 pent->plt.offset = (bfd_vma) -1;
9898 if (!doneone)
9899 {
9900 h->plt.plist = NULL;
9901 h->needs_plt = 0;
9902 }
9903 }
9904 else
9905 {
9906 h->plt.plist = NULL;
9907 h->needs_plt = 0;
9908 }
9909
9910 return TRUE;
9911}
9912
9913/* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections
9914 to set up space for global entry stubs. These are put in glink,
9915 after the branch table. */
9916
9917static bfd_boolean
9918size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
9919{
9920 struct bfd_link_info *info;
9921 struct ppc_link_hash_table *htab;
9922 struct plt_entry *pent;
9923 asection *s;
9924
9925 if (h->root.type == bfd_link_hash_indirect)
9926 return TRUE;
9927
9928 if (!h->pointer_equality_needed)
9929 return TRUE;
9930
9931 if (h->def_regular)
9932 return TRUE;
9933
9934 info = inf;
9935 htab = ppc_hash_table (info);
9936 if (htab == NULL)
9937 return FALSE;
9938
9939 s = htab->glink;
9940 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9941 if (pent->plt.offset != (bfd_vma) -1
9942 && pent->addend == 0)
9943 {
9944 /* For ELFv2, if this symbol is not defined in a regular file
9945 and we are not generating a shared library or pie, then we
9946 need to define the symbol in the executable on a call stub.
9947 This is to avoid text relocations. */
9948 s->size = (s->size + 15) & -16;
9949 h->root.type = bfd_link_hash_defined;
9950 h->root.u.def.section = s;
9951 h->root.u.def.value = s->size;
9952 s->size += 16;
9953 break;
9954 }
9955 return TRUE;
9956}
9957
9958/* Set DF_TEXTREL if we find any dynamic relocs that apply to
9959 read-only sections. */
9960
9961static bfd_boolean
9962maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
9963{
9964 if (h->root.type == bfd_link_hash_indirect)
9965 return TRUE;
9966
9967 if (readonly_dynrelocs (h))
9968 {
9969 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
9970
9971 /* Not an error, just cut short the traversal. */
9972 return FALSE;
9973 }
9974 return TRUE;
9975}
9976
9977/* Set the sizes of the dynamic sections. */
9978
9979static bfd_boolean
9980ppc64_elf_size_dynamic_sections (bfd *output_bfd,
9981 struct bfd_link_info *info)
9982{
9983 struct ppc_link_hash_table *htab;
9984 bfd *dynobj;
9985 asection *s;
9986 bfd_boolean relocs;
9987 bfd *ibfd;
9988 struct got_entry *first_tlsld;
9989
9990 htab = ppc_hash_table (info);
9991 if (htab == NULL)
9992 return FALSE;
9993
9994 dynobj = htab->elf.dynobj;
9995 if (dynobj == NULL)
9996 abort ();
9997
9998 if (htab->elf.dynamic_sections_created)
9999 {
10000 /* Set the contents of the .interp section to the interpreter. */
10001 if (bfd_link_executable (info) && !info->nointerp)
10002 {
10003 s = bfd_get_linker_section (dynobj, ".interp");
10004 if (s == NULL)
10005 abort ();
10006 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
10007 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
10008 }
10009 }
10010
10011 /* Set up .got offsets for local syms, and space for local dynamic
10012 relocs. */
10013 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10014 {
10015 struct got_entry **lgot_ents;
10016 struct got_entry **end_lgot_ents;
10017 struct plt_entry **local_plt;
10018 struct plt_entry **end_local_plt;
10019 unsigned char *lgot_masks;
10020 bfd_size_type locsymcount;
10021 Elf_Internal_Shdr *symtab_hdr;
10022
10023 if (!is_ppc64_elf (ibfd))
10024 continue;
10025
10026 for (s = ibfd->sections; s != NULL; s = s->next)
10027 {
10028 struct ppc_dyn_relocs *p;
10029
10030 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
10031 {
10032 if (!bfd_is_abs_section (p->sec)
10033 && bfd_is_abs_section (p->sec->output_section))
10034 {
10035 /* Input section has been discarded, either because
10036 it is a copy of a linkonce section or due to
10037 linker script /DISCARD/, so we'll be discarding
10038 the relocs too. */
10039 }
10040 else if (p->count != 0)
10041 {
10042 asection *srel = elf_section_data (p->sec)->sreloc;
10043 if (p->ifunc)
10044 srel = htab->elf.irelplt;
10045 srel->size += p->count * sizeof (Elf64_External_Rela);
10046 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
10047 info->flags |= DF_TEXTREL;
10048 }
10049 }
10050 }
10051
10052 lgot_ents = elf_local_got_ents (ibfd);
10053 if (!lgot_ents)
10054 continue;
10055
10056 symtab_hdr = &elf_symtab_hdr (ibfd);
10057 locsymcount = symtab_hdr->sh_info;
10058 end_lgot_ents = lgot_ents + locsymcount;
10059 local_plt = (struct plt_entry **) end_lgot_ents;
10060 end_local_plt = local_plt + locsymcount;
10061 lgot_masks = (unsigned char *) end_local_plt;
10062 s = ppc64_elf_tdata (ibfd)->got;
10063 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10064 {
10065 struct got_entry **pent, *ent;
10066
10067 pent = lgot_ents;
10068 while ((ent = *pent) != NULL)
10069 if (ent->got.refcount > 0)
10070 {
10071 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
10072 {
10073 ppc64_tlsld_got (ibfd)->got.refcount += 1;
10074 *pent = ent->next;
10075 }
10076 else
10077 {
10078 unsigned int ent_size = 8;
10079 unsigned int rel_size = sizeof (Elf64_External_Rela);
10080
10081 ent->got.offset = s->size;
10082 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10083 {
10084 ent_size *= 2;
10085 rel_size *= 2;
10086 }
10087 s->size += ent_size;
10088 if ((*lgot_masks & PLT_IFUNC) != 0)
10089 {
10090 htab->elf.irelplt->size += rel_size;
10091 htab->got_reli_size += rel_size;
10092 }
10093 else if (bfd_link_pic (info))
10094 {
10095 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10096 srel->size += rel_size;
10097 }
10098 pent = &ent->next;
10099 }
10100 }
10101 else
10102 *pent = ent->next;
10103 }
10104
10105 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
10106 for (; local_plt < end_local_plt; ++local_plt)
10107 {
10108 struct plt_entry *ent;
10109
10110 for (ent = *local_plt; ent != NULL; ent = ent->next)
10111 if (ent->plt.refcount > 0)
10112 {
10113 s = htab->elf.iplt;
10114 ent->plt.offset = s->size;
10115 s->size += PLT_ENTRY_SIZE (htab);
10116
10117 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
10118 }
10119 else
10120 ent->plt.offset = (bfd_vma) -1;
10121 }
10122 }
10123
10124 /* Allocate global sym .plt and .got entries, and space for global
10125 sym dynamic relocs. */
10126 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
10127 /* Stash the end of glink branch table. */
10128 if (htab->glink != NULL)
10129 htab->glink->rawsize = htab->glink->size;
10130
10131 if (!htab->opd_abi && !bfd_link_pic (info))
10132 elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info);
10133
10134 first_tlsld = NULL;
10135 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10136 {
10137 struct got_entry *ent;
10138
10139 if (!is_ppc64_elf (ibfd))
10140 continue;
10141
10142 ent = ppc64_tlsld_got (ibfd);
10143 if (ent->got.refcount > 0)
10144 {
10145 if (!htab->do_multi_toc && first_tlsld != NULL)
10146 {
10147 ent->is_indirect = TRUE;
10148 ent->got.ent = first_tlsld;
10149 }
10150 else
10151 {
10152 if (first_tlsld == NULL)
10153 first_tlsld = ent;
10154 s = ppc64_elf_tdata (ibfd)->got;
10155 ent->got.offset = s->size;
10156 ent->owner = ibfd;
10157 s->size += 16;
10158 if (bfd_link_pic (info))
10159 {
10160 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10161 srel->size += sizeof (Elf64_External_Rela);
10162 }
10163 }
10164 }
10165 else
10166 ent->got.offset = (bfd_vma) -1;
10167 }
10168
10169 /* We now have determined the sizes of the various dynamic sections.
10170 Allocate memory for them. */
10171 relocs = FALSE;
10172 for (s = dynobj->sections; s != NULL; s = s->next)
10173 {
10174 if ((s->flags & SEC_LINKER_CREATED) == 0)
10175 continue;
10176
10177 if (s == htab->brlt || s == htab->relbrlt)
10178 /* These haven't been allocated yet; don't strip. */
10179 continue;
10180 else if (s == htab->elf.sgot
10181 || s == htab->elf.splt
10182 || s == htab->elf.iplt
10183 || s == htab->glink
10184 || s == htab->elf.sdynbss
10185 || s == htab->elf.sdynrelro)
10186 {
10187 /* Strip this section if we don't need it; see the
10188 comment below. */
10189 }
10190 else if (s == htab->glink_eh_frame)
10191 {
10192 if (!bfd_is_abs_section (s->output_section))
10193 /* Not sized yet. */
10194 continue;
10195 }
10196 else if (CONST_STRNEQ (s->name, ".rela"))
10197 {
10198 if (s->size != 0)
10199 {
10200 if (s != htab->elf.srelplt)
10201 relocs = TRUE;
10202
10203 /* We use the reloc_count field as a counter if we need
10204 to copy relocs into the output file. */
10205 s->reloc_count = 0;
10206 }
10207 }
10208 else
10209 {
10210 /* It's not one of our sections, so don't allocate space. */
10211 continue;
10212 }
10213
10214 if (s->size == 0)
10215 {
10216 /* If we don't need this section, strip it from the
10217 output file. This is mostly to handle .rela.bss and
10218 .rela.plt. We must create both sections in
10219 create_dynamic_sections, because they must be created
10220 before the linker maps input sections to output
10221 sections. The linker does that before
10222 adjust_dynamic_symbol is called, and it is that
10223 function which decides whether anything needs to go
10224 into these sections. */
10225 s->flags |= SEC_EXCLUDE;
10226 continue;
10227 }
10228
10229 if ((s->flags & SEC_HAS_CONTENTS) == 0)
10230 continue;
10231
10232 /* Allocate memory for the section contents. We use bfd_zalloc
10233 here in case unused entries are not reclaimed before the
10234 section's contents are written out. This should not happen,
10235 but this way if it does we get a R_PPC64_NONE reloc in .rela
10236 sections instead of garbage.
10237 We also rely on the section contents being zero when writing
10238 the GOT and .dynrelro. */
10239 s->contents = bfd_zalloc (dynobj, s->size);
10240 if (s->contents == NULL)
10241 return FALSE;
10242 }
10243
10244 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10245 {
10246 if (!is_ppc64_elf (ibfd))
10247 continue;
10248
10249 s = ppc64_elf_tdata (ibfd)->got;
10250 if (s != NULL && s != htab->elf.sgot)
10251 {
10252 if (s->size == 0)
10253 s->flags |= SEC_EXCLUDE;
10254 else
10255 {
10256 s->contents = bfd_zalloc (ibfd, s->size);
10257 if (s->contents == NULL)
10258 return FALSE;
10259 }
10260 }
10261 s = ppc64_elf_tdata (ibfd)->relgot;
10262 if (s != NULL)
10263 {
10264 if (s->size == 0)
10265 s->flags |= SEC_EXCLUDE;
10266 else
10267 {
10268 s->contents = bfd_zalloc (ibfd, s->size);
10269 if (s->contents == NULL)
10270 return FALSE;
10271 relocs = TRUE;
10272 s->reloc_count = 0;
10273 }
10274 }
10275 }
10276
10277 if (htab->elf.dynamic_sections_created)
10278 {
10279 bfd_boolean tls_opt;
10280
10281 /* Add some entries to the .dynamic section. We fill in the
10282 values later, in ppc64_elf_finish_dynamic_sections, but we
10283 must add the entries now so that we get the correct size for
10284 the .dynamic section. The DT_DEBUG entry is filled in by the
10285 dynamic linker and used by the debugger. */
10286#define add_dynamic_entry(TAG, VAL) \
10287 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
10288
10289 if (bfd_link_executable (info))
10290 {
10291 if (!add_dynamic_entry (DT_DEBUG, 0))
10292 return FALSE;
10293 }
10294
10295 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
10296 {
10297 if (!add_dynamic_entry (DT_PLTGOT, 0)
10298 || !add_dynamic_entry (DT_PLTRELSZ, 0)
10299 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
10300 || !add_dynamic_entry (DT_JMPREL, 0)
10301 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
10302 return FALSE;
10303 }
10304
10305 if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1)
10306 {
10307 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
10308 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
10309 return FALSE;
10310 }
10311
10312 tls_opt = (htab->params->tls_get_addr_opt
10313 && htab->tls_get_addr_fd != NULL
10314 && htab->tls_get_addr_fd->elf.plt.plist != NULL);
10315 if (tls_opt || !htab->opd_abi)
10316 {
10317 if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0))
10318 return FALSE;
10319 }
10320
10321 if (relocs)
10322 {
10323 if (!add_dynamic_entry (DT_RELA, 0)
10324 || !add_dynamic_entry (DT_RELASZ, 0)
10325 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
10326 return FALSE;
10327
10328 /* If any dynamic relocs apply to a read-only section,
10329 then we need a DT_TEXTREL entry. */
10330 if ((info->flags & DF_TEXTREL) == 0)
10331 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
10332
10333 if ((info->flags & DF_TEXTREL) != 0)
10334 {
10335 if (!add_dynamic_entry (DT_TEXTREL, 0))
10336 return FALSE;
10337 }
10338 }
10339 }
10340#undef add_dynamic_entry
10341
10342 return TRUE;
10343}
10344
10345/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
10346
10347static bfd_boolean
10348ppc64_elf_hash_symbol (struct elf_link_hash_entry *h)
10349{
10350 if (h->plt.plist != NULL
10351 && !h->def_regular
10352 && !h->pointer_equality_needed)
10353 return FALSE;
10354
10355 return _bfd_elf_hash_symbol (h);
10356}
10357
10358/* Determine the type of stub needed, if any, for a call. */
10359
10360static inline enum ppc_stub_type
10361ppc_type_of_stub (asection *input_sec,
10362 const Elf_Internal_Rela *rel,
10363 struct ppc_link_hash_entry **hash,
10364 struct plt_entry **plt_ent,
10365 bfd_vma destination,
10366 unsigned long local_off)
10367{
10368 struct ppc_link_hash_entry *h = *hash;
10369 bfd_vma location;
10370 bfd_vma branch_offset;
10371 bfd_vma max_branch_offset;
10372 enum elf_ppc64_reloc_type r_type;
10373
10374 if (h != NULL)
10375 {
10376 struct plt_entry *ent;
10377 struct ppc_link_hash_entry *fdh = h;
10378 if (h->oh != NULL
10379 && h->oh->is_func_descriptor)
10380 {
10381 fdh = ppc_follow_link (h->oh);
10382 *hash = fdh;
10383 }
10384
10385 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
10386 if (ent->addend == rel->r_addend
10387 && ent->plt.offset != (bfd_vma) -1)
10388 {
10389 *plt_ent = ent;
10390 return ppc_stub_plt_call;
10391 }
10392
10393 /* Here, we know we don't have a plt entry. If we don't have a
10394 either a defined function descriptor or a defined entry symbol
10395 in a regular object file, then it is pointless trying to make
10396 any other type of stub. */
10397 if (!is_static_defined (&fdh->elf)
10398 && !is_static_defined (&h->elf))
10399 return ppc_stub_none;
10400 }
10401 else if (elf_local_got_ents (input_sec->owner) != NULL)
10402 {
10403 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
10404 struct plt_entry **local_plt = (struct plt_entry **)
10405 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
10406 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
10407
10408 if (local_plt[r_symndx] != NULL)
10409 {
10410 struct plt_entry *ent;
10411
10412 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
10413 if (ent->addend == rel->r_addend
10414 && ent->plt.offset != (bfd_vma) -1)
10415 {
10416 *plt_ent = ent;
10417 return ppc_stub_plt_call;
10418 }
10419 }
10420 }
10421
10422 /* Determine where the call point is. */
10423 location = (input_sec->output_offset
10424 + input_sec->output_section->vma
10425 + rel->r_offset);
10426
10427 branch_offset = destination - location;
10428 r_type = ELF64_R_TYPE (rel->r_info);
10429
10430 /* Determine if a long branch stub is needed. */
10431 max_branch_offset = 1 << 25;
10432 if (r_type != R_PPC64_REL24)
10433 max_branch_offset = 1 << 15;
10434
10435 if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off)
10436 /* We need a stub. Figure out whether a long_branch or plt_branch
10437 is needed later. */
10438 return ppc_stub_long_branch;
10439
10440 return ppc_stub_none;
10441}
10442
10443/* With power7 weakly ordered memory model, it is possible for ld.so
10444 to update a plt entry in one thread and have another thread see a
10445 stale zero toc entry. To avoid this we need some sort of acquire
10446 barrier in the call stub. One solution is to make the load of the
10447 toc word seem to appear to depend on the load of the function entry
10448 word. Another solution is to test for r2 being zero, and branch to
10449 the appropriate glink entry if so.
10450
10451 . fake dep barrier compare
10452 . ld 12,xxx(2) ld 12,xxx(2)
10453 . mtctr 12 mtctr 12
10454 . xor 11,12,12 ld 2,xxx+8(2)
10455 . add 2,2,11 cmpldi 2,0
10456 . ld 2,xxx+8(2) bnectr+
10457 . bctr b <glink_entry>
10458
10459 The solution involving the compare turns out to be faster, so
10460 that's what we use unless the branch won't reach. */
10461
10462#define ALWAYS_USE_FAKE_DEP 0
10463#define ALWAYS_EMIT_R2SAVE 0
10464
10465#define PPC_LO(v) ((v) & 0xffff)
10466#define PPC_HI(v) (((v) >> 16) & 0xffff)
10467#define PPC_HA(v) PPC_HI ((v) + 0x8000)
10468
10469static inline unsigned int
10470plt_stub_size (struct ppc_link_hash_table *htab,
10471 struct ppc_stub_hash_entry *stub_entry,
10472 bfd_vma off)
10473{
10474 unsigned size = 12;
10475
10476 if (ALWAYS_EMIT_R2SAVE
10477 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10478 size += 4;
10479 if (PPC_HA (off) != 0)
10480 size += 4;
10481 if (htab->opd_abi)
10482 {
10483 size += 4;
10484 if (htab->params->plt_static_chain)
10485 size += 4;
10486 if (htab->params->plt_thread_safe
10487 && htab->elf.dynamic_sections_created
10488 && stub_entry->h != NULL
10489 && stub_entry->h->elf.dynindx != -1)
10490 size += 8;
10491 if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off))
10492 size += 4;
10493 }
10494 if (stub_entry->h != NULL
10495 && (stub_entry->h == htab->tls_get_addr_fd
10496 || stub_entry->h == htab->tls_get_addr)
10497 && htab->params->tls_get_addr_opt)
10498 size += 13 * 4;
10499 return size;
10500}
10501
10502/* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
10503 then return the padding needed to do so. */
10504static inline unsigned int
10505plt_stub_pad (struct ppc_link_hash_table *htab,
10506 struct ppc_stub_hash_entry *stub_entry,
10507 bfd_vma plt_off)
10508{
10509 int stub_align = 1 << htab->params->plt_stub_align;
10510 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
10511 bfd_vma stub_off = stub_entry->group->stub_sec->size;
10512
10513 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
10514 > ((stub_size - 1) & -stub_align))
10515 return stub_align - (stub_off & (stub_align - 1));
10516 return 0;
10517}
10518
10519/* Build a .plt call stub. */
10520
10521static inline bfd_byte *
10522build_plt_stub (struct ppc_link_hash_table *htab,
10523 struct ppc_stub_hash_entry *stub_entry,
10524 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10525{
10526 bfd *obfd = htab->params->stub_bfd;
10527 bfd_boolean plt_load_toc = htab->opd_abi;
10528 bfd_boolean plt_static_chain = htab->params->plt_static_chain;
10529 bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe
10530 && htab->elf.dynamic_sections_created
10531 && stub_entry->h != NULL
10532 && stub_entry->h->elf.dynindx != -1);
10533 bfd_boolean use_fake_dep = plt_thread_safe;
10534 bfd_vma cmp_branch_off = 0;
10535
10536 if (!ALWAYS_USE_FAKE_DEP
10537 && plt_load_toc
10538 && plt_thread_safe
10539 && !((stub_entry->h == htab->tls_get_addr_fd
10540 || stub_entry->h == htab->tls_get_addr)
10541 && htab->params->tls_get_addr_opt))
10542 {
10543 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
10544 bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab))
10545 / PLT_ENTRY_SIZE (htab));
10546 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
10547 bfd_vma to, from;
10548
10549 if (pltindex > 32768)
10550 glinkoff += (pltindex - 32768) * 4;
10551 to = (glinkoff
10552 + htab->glink->output_offset
10553 + htab->glink->output_section->vma);
10554 from = (p - stub_entry->group->stub_sec->contents
10555 + 4 * (ALWAYS_EMIT_R2SAVE
10556 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10557 + 4 * (PPC_HA (offset) != 0)
10558 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
10559 != PPC_HA (offset))
10560 + 4 * (plt_static_chain != 0)
10561 + 20
10562 + stub_entry->group->stub_sec->output_offset
10563 + stub_entry->group->stub_sec->output_section->vma);
10564 cmp_branch_off = to - from;
10565 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
10566 }
10567
10568 if (PPC_HA (offset) != 0)
10569 {
10570 if (r != NULL)
10571 {
10572 if (ALWAYS_EMIT_R2SAVE
10573 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10574 r[0].r_offset += 4;
10575 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10576 r[1].r_offset = r[0].r_offset + 4;
10577 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10578 r[1].r_addend = r[0].r_addend;
10579 if (plt_load_toc)
10580 {
10581 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10582 {
10583 r[2].r_offset = r[1].r_offset + 4;
10584 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
10585 r[2].r_addend = r[0].r_addend;
10586 }
10587 else
10588 {
10589 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
10590 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10591 r[2].r_addend = r[0].r_addend + 8;
10592 if (plt_static_chain)
10593 {
10594 r[3].r_offset = r[2].r_offset + 4;
10595 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10596 r[3].r_addend = r[0].r_addend + 16;
10597 }
10598 }
10599 }
10600 }
10601 if (ALWAYS_EMIT_R2SAVE
10602 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10603 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10604 if (plt_load_toc)
10605 {
10606 bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4;
10607 bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4;
10608 }
10609 else
10610 {
10611 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
10612 bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4;
10613 }
10614 if (plt_load_toc
10615 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10616 {
10617 bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4;
10618 offset = 0;
10619 }
10620 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10621 if (plt_load_toc)
10622 {
10623 if (use_fake_dep)
10624 {
10625 bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4;
10626 bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4;
10627 }
10628 bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4;
10629 if (plt_static_chain)
10630 bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4;
10631 }
10632 }
10633 else
10634 {
10635 if (r != NULL)
10636 {
10637 if (ALWAYS_EMIT_R2SAVE
10638 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10639 r[0].r_offset += 4;
10640 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10641 if (plt_load_toc)
10642 {
10643 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10644 {
10645 r[1].r_offset = r[0].r_offset + 4;
10646 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
10647 r[1].r_addend = r[0].r_addend;
10648 }
10649 else
10650 {
10651 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
10652 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10653 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
10654 if (plt_static_chain)
10655 {
10656 r[2].r_offset = r[1].r_offset + 4;
10657 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10658 r[2].r_addend = r[0].r_addend + 8;
10659 }
10660 }
10661 }
10662 }
10663 if (ALWAYS_EMIT_R2SAVE
10664 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10665 bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4;
10666 bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4;
10667 if (plt_load_toc
10668 && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
10669 {
10670 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
10671 offset = 0;
10672 }
10673 bfd_put_32 (obfd, MTCTR_R12, p), p += 4;
10674 if (plt_load_toc)
10675 {
10676 if (use_fake_dep)
10677 {
10678 bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4;
10679 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
10680 }
10681 if (plt_static_chain)
10682 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
10683 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
10684 }
10685 }
10686 if (plt_load_toc && plt_thread_safe && !use_fake_dep)
10687 {
10688 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
10689 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
10690 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
10691 }
10692 else
10693 bfd_put_32 (obfd, BCTR, p), p += 4;
10694 return p;
10695}
10696
10697/* Build a special .plt call stub for __tls_get_addr. */
10698
10699#define LD_R11_0R3 0xe9630000
10700#define LD_R12_0R3 0xe9830000
10701#define MR_R0_R3 0x7c601b78
10702#define CMPDI_R11_0 0x2c2b0000
10703#define ADD_R3_R12_R13 0x7c6c6a14
10704#define BEQLR 0x4d820020
10705#define MR_R3_R0 0x7c030378
10706#define STD_R11_0R1 0xf9610000
10707#define BCTRL 0x4e800421
10708#define LD_R11_0R1 0xe9610000
10709#define MTLR_R11 0x7d6803a6
10710
10711static inline bfd_byte *
10712build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10713 struct ppc_stub_hash_entry *stub_entry,
10714 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10715{
10716 bfd *obfd = htab->params->stub_bfd;
10717
10718 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10719 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10720 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10721 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10722 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10723 bfd_put_32 (obfd, BEQLR, p), p += 4;
10724 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10725 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10726 bfd_put_32 (obfd, STD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10727
10728 if (r != NULL)
10729 r[0].r_offset += 9 * 4;
10730 p = build_plt_stub (htab, stub_entry, p, offset, r);
10731 bfd_put_32 (obfd, BCTRL, p - 4);
10732
10733 bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p), p += 4;
10734 bfd_put_32 (obfd, LD_R11_0R1 + STK_LINKER (htab), p), p += 4;
10735 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10736 bfd_put_32 (obfd, BLR, p), p += 4;
10737
10738 return p;
10739}
10740
10741static Elf_Internal_Rela *
10742get_relocs (asection *sec, int count)
10743{
10744 Elf_Internal_Rela *relocs;
10745 struct bfd_elf_section_data *elfsec_data;
10746
10747 elfsec_data = elf_section_data (sec);
10748 relocs = elfsec_data->relocs;
10749 if (relocs == NULL)
10750 {
10751 bfd_size_type relsize;
10752 relsize = sec->reloc_count * sizeof (*relocs);
10753 relocs = bfd_alloc (sec->owner, relsize);
10754 if (relocs == NULL)
10755 return NULL;
10756 elfsec_data->relocs = relocs;
10757 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10758 sizeof (Elf_Internal_Shdr));
10759 if (elfsec_data->rela.hdr == NULL)
10760 return NULL;
10761 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10762 * sizeof (Elf64_External_Rela));
10763 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10764 sec->reloc_count = 0;
10765 }
10766 relocs += sec->reloc_count;
10767 sec->reloc_count += count;
10768 return relocs;
10769}
10770
10771static bfd_vma
10772get_r2off (struct bfd_link_info *info,
10773 struct ppc_stub_hash_entry *stub_entry)
10774{
10775 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10776 bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off;
10777
10778 if (r2off == 0)
10779 {
10780 /* Support linking -R objects. Get the toc pointer from the
10781 opd entry. */
10782 char buf[8];
10783 if (!htab->opd_abi)
10784 return r2off;
10785 asection *opd = stub_entry->h->elf.root.u.def.section;
10786 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10787
10788 if (strcmp (opd->name, ".opd") != 0
10789 || opd->reloc_count != 0)
10790 {
10791 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10792 stub_entry->h->elf.root.root.string);
10793 bfd_set_error (bfd_error_bad_value);
10794 return (bfd_vma) -1;
10795 }
10796 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10797 return (bfd_vma) -1;
10798 r2off = bfd_get_64 (opd->owner, buf);
10799 r2off -= elf_gp (info->output_bfd);
10800 }
10801 r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off;
10802 return r2off;
10803}
10804
10805static bfd_boolean
10806ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10807{
10808 struct ppc_stub_hash_entry *stub_entry;
10809 struct ppc_branch_hash_entry *br_entry;
10810 struct bfd_link_info *info;
10811 struct ppc_link_hash_table *htab;
10812 bfd_byte *loc;
10813 bfd_byte *p;
10814 bfd_vma dest, off;
10815 int size;
10816 Elf_Internal_Rela *r;
10817 asection *plt;
10818
10819 /* Massage our args to the form they really have. */
10820 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10821 info = in_arg;
10822
10823 htab = ppc_hash_table (info);
10824 if (htab == NULL)
10825 return FALSE;
10826
10827 /* Make a note of the offset within the stubs for this entry. */
10828 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
10829 loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset;
10830
10831 htab->stub_count[stub_entry->stub_type - 1] += 1;
10832 switch (stub_entry->stub_type)
10833 {
10834 case ppc_stub_long_branch:
10835 case ppc_stub_long_branch_r2off:
10836 /* Branches are relative. This is where we are going to. */
10837 dest = (stub_entry->target_value
10838 + stub_entry->target_section->output_offset
10839 + stub_entry->target_section->output_section->vma);
10840 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10841 off = dest;
10842
10843 /* And this is where we are coming from. */
10844 off -= (stub_entry->stub_offset
10845 + stub_entry->group->stub_sec->output_offset
10846 + stub_entry->group->stub_sec->output_section->vma);
10847
10848 size = 4;
10849 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10850 {
10851 bfd_vma r2off = get_r2off (info, stub_entry);
10852
10853 if (r2off == (bfd_vma) -1)
10854 {
10855 htab->stub_error = TRUE;
10856 return FALSE;
10857 }
10858 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
10859 loc += 4;
10860 size = 8;
10861 if (PPC_HA (r2off) != 0)
10862 {
10863 bfd_put_32 (htab->params->stub_bfd,
10864 ADDIS_R2_R2 | PPC_HA (r2off), loc);
10865 loc += 4;
10866 size += 4;
10867 }
10868 if (PPC_LO (r2off) != 0)
10869 {
10870 bfd_put_32 (htab->params->stub_bfd,
10871 ADDI_R2_R2 | PPC_LO (r2off), loc);
10872 loc += 4;
10873 size += 4;
10874 }
10875 off -= size - 4;
10876 }
10877 bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10878
10879 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10880 {
10881 info->callbacks->einfo
10882 (_("%P: long branch stub `%s' offset overflow\n"),
10883 stub_entry->root.string);
10884 htab->stub_error = TRUE;
10885 return FALSE;
10886 }
10887
10888 if (info->emitrelocations)
10889 {
10890 r = get_relocs (stub_entry->group->stub_sec, 1);
10891 if (r == NULL)
10892 return FALSE;
10893 r->r_offset = loc - stub_entry->group->stub_sec->contents;
10894 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10895 r->r_addend = dest;
10896 if (stub_entry->h != NULL)
10897 {
10898 struct elf_link_hash_entry **hashes;
10899 unsigned long symndx;
10900 struct ppc_link_hash_entry *h;
10901
10902 hashes = elf_sym_hashes (htab->params->stub_bfd);
10903 if (hashes == NULL)
10904 {
10905 bfd_size_type hsize;
10906
10907 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10908 hashes = bfd_zalloc (htab->params->stub_bfd, hsize);
10909 if (hashes == NULL)
10910 return FALSE;
10911 elf_sym_hashes (htab->params->stub_bfd) = hashes;
10912 htab->stub_globals = 1;
10913 }
10914 symndx = htab->stub_globals++;
10915 h = stub_entry->h;
10916 hashes[symndx] = &h->elf;
10917 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10918 if (h->oh != NULL && h->oh->is_func)
10919 h = ppc_follow_link (h->oh);
10920 if (h->elf.root.u.def.section != stub_entry->target_section)
10921 /* H is an opd symbol. The addend must be zero. */
10922 r->r_addend = 0;
10923 else
10924 {
10925 off = (h->elf.root.u.def.value
10926 + h->elf.root.u.def.section->output_offset
10927 + h->elf.root.u.def.section->output_section->vma);
10928 r->r_addend -= off;
10929 }
10930 }
10931 }
10932 break;
10933
10934 case ppc_stub_plt_branch:
10935 case ppc_stub_plt_branch_r2off:
10936 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10937 stub_entry->root.string + 9,
10938 FALSE, FALSE);
10939 if (br_entry == NULL)
10940 {
10941 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10942 stub_entry->root.string);
10943 htab->stub_error = TRUE;
10944 return FALSE;
10945 }
10946
10947 dest = (stub_entry->target_value
10948 + stub_entry->target_section->output_offset
10949 + stub_entry->target_section->output_section->vma);
10950 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10951 dest += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
10952
10953 bfd_put_64 (htab->brlt->owner, dest,
10954 htab->brlt->contents + br_entry->offset);
10955
10956 if (br_entry->iter == htab->stub_iteration)
10957 {
10958 br_entry->iter = 0;
10959
10960 if (htab->relbrlt != NULL)
10961 {
10962 /* Create a reloc for the branch lookup table entry. */
10963 Elf_Internal_Rela rela;
10964 bfd_byte *rl;
10965
10966 rela.r_offset = (br_entry->offset
10967 + htab->brlt->output_offset
10968 + htab->brlt->output_section->vma);
10969 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10970 rela.r_addend = dest;
10971
10972 rl = htab->relbrlt->contents;
10973 rl += (htab->relbrlt->reloc_count++
10974 * sizeof (Elf64_External_Rela));
10975 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10976 }
10977 else if (info->emitrelocations)
10978 {
10979 r = get_relocs (htab->brlt, 1);
10980 if (r == NULL)
10981 return FALSE;
10982 /* brlt, being SEC_LINKER_CREATED does not go through the
10983 normal reloc processing. Symbols and offsets are not
10984 translated from input file to output file form, so
10985 set up the offset per the output file. */
10986 r->r_offset = (br_entry->offset
10987 + htab->brlt->output_offset
10988 + htab->brlt->output_section->vma);
10989 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10990 r->r_addend = dest;
10991 }
10992 }
10993
10994 dest = (br_entry->offset
10995 + htab->brlt->output_offset
10996 + htab->brlt->output_section->vma);
10997
10998 off = (dest
10999 - elf_gp (htab->brlt->output_section->owner)
11000 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11001
11002 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11003 {
11004 info->callbacks->einfo
11005 (_("%P: linkage table error against `%T'\n"),
11006 stub_entry->root.string);
11007 bfd_set_error (bfd_error_bad_value);
11008 htab->stub_error = TRUE;
11009 return FALSE;
11010 }
11011
11012 if (info->emitrelocations)
11013 {
11014 r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0));
11015 if (r == NULL)
11016 return FALSE;
11017 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11018 if (bfd_big_endian (info->output_bfd))
11019 r[0].r_offset += 2;
11020 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
11021 r[0].r_offset += 4;
11022 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
11023 r[0].r_addend = dest;
11024 if (PPC_HA (off) != 0)
11025 {
11026 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
11027 r[1].r_offset = r[0].r_offset + 4;
11028 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
11029 r[1].r_addend = r[0].r_addend;
11030 }
11031 }
11032
11033 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11034 {
11035 if (PPC_HA (off) != 0)
11036 {
11037 size = 16;
11038 bfd_put_32 (htab->params->stub_bfd,
11039 ADDIS_R12_R2 | PPC_HA (off), loc);
11040 loc += 4;
11041 bfd_put_32 (htab->params->stub_bfd,
11042 LD_R12_0R12 | PPC_LO (off), loc);
11043 }
11044 else
11045 {
11046 size = 12;
11047 bfd_put_32 (htab->params->stub_bfd,
11048 LD_R12_0R2 | PPC_LO (off), loc);
11049 }
11050 }
11051 else
11052 {
11053 bfd_vma r2off = get_r2off (info, stub_entry);
11054
11055 if (r2off == (bfd_vma) -1)
11056 {
11057 htab->stub_error = TRUE;
11058 return FALSE;
11059 }
11060
11061 bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), loc);
11062 loc += 4;
11063 size = 16;
11064 if (PPC_HA (off) != 0)
11065 {
11066 size += 4;
11067 bfd_put_32 (htab->params->stub_bfd,
11068 ADDIS_R12_R2 | PPC_HA (off), loc);
11069 loc += 4;
11070 bfd_put_32 (htab->params->stub_bfd,
11071 LD_R12_0R12 | PPC_LO (off), loc);
11072 }
11073 else
11074 bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), loc);
11075
11076 if (PPC_HA (r2off) != 0)
11077 {
11078 size += 4;
11079 loc += 4;
11080 bfd_put_32 (htab->params->stub_bfd,
11081 ADDIS_R2_R2 | PPC_HA (r2off), loc);
11082 }
11083 if (PPC_LO (r2off) != 0)
11084 {
11085 size += 4;
11086 loc += 4;
11087 bfd_put_32 (htab->params->stub_bfd,
11088 ADDI_R2_R2 | PPC_LO (r2off), loc);
11089 }
11090 }
11091 loc += 4;
11092 bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, loc);
11093 loc += 4;
11094 bfd_put_32 (htab->params->stub_bfd, BCTR, loc);
11095 break;
11096
11097 case ppc_stub_plt_call:
11098 case ppc_stub_plt_call_r2save:
11099 if (stub_entry->h != NULL
11100 && stub_entry->h->is_func_descriptor
11101 && stub_entry->h->oh != NULL)
11102 {
11103 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
11104
11105 /* If the old-ABI "dot-symbol" is undefined make it weak so
11106 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */
11107 if (fh->elf.root.type == bfd_link_hash_undefined
11108 && (stub_entry->h->elf.root.type == bfd_link_hash_defined
11109 || stub_entry->h->elf.root.type == bfd_link_hash_defweak))
11110 fh->elf.root.type = bfd_link_hash_undefweak;
11111 }
11112
11113 /* Now build the stub. */
11114 dest = stub_entry->plt_ent->plt.offset & ~1;
11115 if (dest >= (bfd_vma) -2)
11116 abort ();
11117
11118 plt = htab->elf.splt;
11119 if (!htab->elf.dynamic_sections_created
11120 || stub_entry->h == NULL
11121 || stub_entry->h->elf.dynindx == -1)
11122 plt = htab->elf.iplt;
11123
11124 dest += plt->output_offset + plt->output_section->vma;
11125
11126 if (stub_entry->h == NULL
11127 && (stub_entry->plt_ent->plt.offset & 1) == 0)
11128 {
11129 Elf_Internal_Rela rela;
11130 bfd_byte *rl;
11131
11132 rela.r_offset = dest;
11133 if (htab->opd_abi)
11134 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
11135 else
11136 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11137 rela.r_addend = (stub_entry->target_value
11138 + stub_entry->target_section->output_offset
11139 + stub_entry->target_section->output_section->vma);
11140
11141 rl = (htab->elf.irelplt->contents
11142 + (htab->elf.irelplt->reloc_count++
11143 * sizeof (Elf64_External_Rela)));
11144 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
11145 stub_entry->plt_ent->plt.offset |= 1;
11146 }
11147
11148 off = (dest
11149 - elf_gp (plt->output_section->owner)
11150 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11151
11152 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
11153 {
11154 info->callbacks->einfo
11155 /* xgettext:c-format */
11156 (_("%P: linkage table error against `%T'\n"),
11157 stub_entry->h != NULL
11158 ? stub_entry->h->elf.root.root.string
11159 : "<local sym>");
11160 bfd_set_error (bfd_error_bad_value);
11161 htab->stub_error = TRUE;
11162 return FALSE;
11163 }
11164
11165 if (htab->params->plt_stub_align != 0)
11166 {
11167 unsigned pad = plt_stub_pad (htab, stub_entry, off);
11168
11169 stub_entry->group->stub_sec->size += pad;
11170 stub_entry->stub_offset = stub_entry->group->stub_sec->size;
11171 loc += pad;
11172 }
11173
11174 r = NULL;
11175 if (info->emitrelocations)
11176 {
11177 r = get_relocs (stub_entry->group->stub_sec,
11178 ((PPC_HA (off) != 0)
11179 + (htab->opd_abi
11180 ? 2 + (htab->params->plt_static_chain
11181 && PPC_HA (off + 16) == PPC_HA (off))
11182 : 1)));
11183 if (r == NULL)
11184 return FALSE;
11185 r[0].r_offset = loc - stub_entry->group->stub_sec->contents;
11186 if (bfd_big_endian (info->output_bfd))
11187 r[0].r_offset += 2;
11188 r[0].r_addend = dest;
11189 }
11190 if (stub_entry->h != NULL
11191 && (stub_entry->h == htab->tls_get_addr_fd
11192 || stub_entry->h == htab->tls_get_addr)
11193 && htab->params->tls_get_addr_opt)
11194 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
11195 else
11196 p = build_plt_stub (htab, stub_entry, loc, off, r);
11197 size = p - loc;
11198 break;
11199
11200 case ppc_stub_save_res:
11201 return TRUE;
11202
11203 default:
11204 BFD_FAIL ();
11205 return FALSE;
11206 }
11207
11208 stub_entry->group->stub_sec->size += size;
11209
11210 if (htab->params->emit_stub_syms)
11211 {
11212 struct elf_link_hash_entry *h;
11213 size_t len1, len2;
11214 char *name;
11215 const char *const stub_str[] = { "long_branch",
11216 "long_branch_r2off",
11217 "plt_branch",
11218 "plt_branch_r2off",
11219 "plt_call",
11220 "plt_call" };
11221
11222 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
11223 len2 = strlen (stub_entry->root.string);
11224 name = bfd_malloc (len1 + len2 + 2);
11225 if (name == NULL)
11226 return FALSE;
11227 memcpy (name, stub_entry->root.string, 9);
11228 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
11229 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
11230 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
11231 if (h == NULL)
11232 return FALSE;
11233 if (h->root.type == bfd_link_hash_new)
11234 {
11235 h->root.type = bfd_link_hash_defined;
11236 h->root.u.def.section = stub_entry->group->stub_sec;
11237 h->root.u.def.value = stub_entry->stub_offset;
11238 h->ref_regular = 1;
11239 h->def_regular = 1;
11240 h->ref_regular_nonweak = 1;
11241 h->forced_local = 1;
11242 h->non_elf = 0;
11243 h->root.linker_def = 1;
11244 }
11245 }
11246
11247 return TRUE;
11248}
11249
11250/* As above, but don't actually build the stub. Just bump offset so
11251 we know stub section sizes, and select plt_branch stubs where
11252 long_branch stubs won't do. */
11253
11254static bfd_boolean
11255ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
11256{
11257 struct ppc_stub_hash_entry *stub_entry;
11258 struct bfd_link_info *info;
11259 struct ppc_link_hash_table *htab;
11260 bfd_vma off;
11261 int size;
11262
11263 /* Massage our args to the form they really have. */
11264 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
11265 info = in_arg;
11266
11267 htab = ppc_hash_table (info);
11268 if (htab == NULL)
11269 return FALSE;
11270
11271 if (stub_entry->h != NULL
11272 && stub_entry->h->save_res
11273 && stub_entry->h->elf.root.type == bfd_link_hash_defined
11274 && stub_entry->h->elf.root.u.def.section == htab->sfpr)
11275 {
11276 /* Don't make stubs to out-of-line register save/restore
11277 functions. Instead, emit copies of the functions. */
11278 stub_entry->group->needs_save_res = 1;
11279 stub_entry->stub_type = ppc_stub_save_res;
11280 return TRUE;
11281 }
11282
11283 if (stub_entry->stub_type == ppc_stub_plt_call
11284 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
11285 {
11286 asection *plt;
11287 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
11288 if (off >= (bfd_vma) -2)
11289 abort ();
11290 plt = htab->elf.splt;
11291 if (!htab->elf.dynamic_sections_created
11292 || stub_entry->h == NULL
11293 || stub_entry->h->elf.dynindx == -1)
11294 plt = htab->elf.iplt;
11295 off += (plt->output_offset
11296 + plt->output_section->vma
11297 - elf_gp (plt->output_section->owner)
11298 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11299
11300 size = plt_stub_size (htab, stub_entry, off);
11301 if (htab->params->plt_stub_align)
11302 size += plt_stub_pad (htab, stub_entry, off);
11303 if (info->emitrelocations)
11304 {
11305 stub_entry->group->stub_sec->reloc_count
11306 += ((PPC_HA (off) != 0)
11307 + (htab->opd_abi
11308 ? 2 + (htab->params->plt_static_chain
11309 && PPC_HA (off + 16) == PPC_HA (off))
11310 : 1));
11311 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11312 }
11313 }
11314 else
11315 {
11316 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
11317 variants. */
11318 bfd_vma r2off = 0;
11319 bfd_vma local_off = 0;
11320
11321 off = (stub_entry->target_value
11322 + stub_entry->target_section->output_offset
11323 + stub_entry->target_section->output_section->vma);
11324 off -= (stub_entry->group->stub_sec->size
11325 + stub_entry->group->stub_sec->output_offset
11326 + stub_entry->group->stub_sec->output_section->vma);
11327
11328 /* Reset the stub type from the plt variant in case we now
11329 can reach with a shorter stub. */
11330 if (stub_entry->stub_type >= ppc_stub_plt_branch)
11331 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
11332
11333 size = 4;
11334 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
11335 {
11336 r2off = get_r2off (info, stub_entry);
11337 if (r2off == (bfd_vma) -1)
11338 {
11339 htab->stub_error = TRUE;
11340 return FALSE;
11341 }
11342 size = 8;
11343 if (PPC_HA (r2off) != 0)
11344 size += 4;
11345 if (PPC_LO (r2off) != 0)
11346 size += 4;
11347 off -= size - 4;
11348 }
11349
11350 local_off = PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other);
11351
11352 /* If the branch offset if too big, use a ppc_stub_plt_branch.
11353 Do the same for -R objects without function descriptors. */
11354 if (off + (1 << 25) >= (bfd_vma) (1 << 26) - local_off
11355 || (stub_entry->stub_type == ppc_stub_long_branch_r2off
11356 && r2off == 0
11357 && htab->sec_info[stub_entry->target_section->id].toc_off == 0))
11358 {
11359 struct ppc_branch_hash_entry *br_entry;
11360
11361 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
11362 stub_entry->root.string + 9,
11363 TRUE, FALSE);
11364 if (br_entry == NULL)
11365 {
11366 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
11367 stub_entry->root.string);
11368 htab->stub_error = TRUE;
11369 return FALSE;
11370 }
11371
11372 if (br_entry->iter != htab->stub_iteration)
11373 {
11374 br_entry->iter = htab->stub_iteration;
11375 br_entry->offset = htab->brlt->size;
11376 htab->brlt->size += 8;
11377
11378 if (htab->relbrlt != NULL)
11379 htab->relbrlt->size += sizeof (Elf64_External_Rela);
11380 else if (info->emitrelocations)
11381 {
11382 htab->brlt->reloc_count += 1;
11383 htab->brlt->flags |= SEC_RELOC;
11384 }
11385 }
11386
11387 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
11388 off = (br_entry->offset
11389 + htab->brlt->output_offset
11390 + htab->brlt->output_section->vma
11391 - elf_gp (htab->brlt->output_section->owner)
11392 - htab->sec_info[stub_entry->group->link_sec->id].toc_off);
11393
11394 if (info->emitrelocations)
11395 {
11396 stub_entry->group->stub_sec->reloc_count
11397 += 1 + (PPC_HA (off) != 0);
11398 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11399 }
11400
11401 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
11402 {
11403 size = 12;
11404 if (PPC_HA (off) != 0)
11405 size = 16;
11406 }
11407 else
11408 {
11409 size = 16;
11410 if (PPC_HA (off) != 0)
11411 size += 4;
11412
11413 if (PPC_HA (r2off) != 0)
11414 size += 4;
11415 if (PPC_LO (r2off) != 0)
11416 size += 4;
11417 }
11418 }
11419 else if (info->emitrelocations)
11420 {
11421 stub_entry->group->stub_sec->reloc_count += 1;
11422 stub_entry->group->stub_sec->flags |= SEC_RELOC;
11423 }
11424 }
11425
11426 stub_entry->group->stub_sec->size += size;
11427 return TRUE;
11428}
11429
11430/* Set up various things so that we can make a list of input sections
11431 for each output section included in the link. Returns -1 on error,
11432 0 when no stubs will be needed, and 1 on success. */
11433
11434int
11435ppc64_elf_setup_section_lists (struct bfd_link_info *info)
11436{
11437 unsigned int id;
11438 bfd_size_type amt;
11439 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11440
11441 if (htab == NULL)
11442 return -1;
11443
11444 htab->sec_info_arr_size = bfd_get_next_section_id ();
11445 amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size);
11446 htab->sec_info = bfd_zmalloc (amt);
11447 if (htab->sec_info == NULL)
11448 return -1;
11449
11450 /* Set toc_off for com, und, abs and ind sections. */
11451 for (id = 0; id < 3; id++)
11452 htab->sec_info[id].toc_off = TOC_BASE_OFF;
11453
11454 return 1;
11455}
11456
11457/* Set up for first pass at multitoc partitioning. */
11458
11459void
11460ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
11461{
11462 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11463
11464 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
11465 htab->toc_bfd = NULL;
11466 htab->toc_first_sec = NULL;
11467}
11468
11469/* The linker repeatedly calls this function for each TOC input section
11470 and linker generated GOT section. Group input bfds such that the toc
11471 within a group is less than 64k in size. */
11472
11473bfd_boolean
11474ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
11475{
11476 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11477 bfd_vma addr, off, limit;
11478
11479 if (htab == NULL)
11480 return FALSE;
11481
11482 if (!htab->second_toc_pass)
11483 {
11484 /* Keep track of the first .toc or .got section for this input bfd. */
11485 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
11486
11487 if (new_bfd)
11488 {
11489 htab->toc_bfd = isec->owner;
11490 htab->toc_first_sec = isec;
11491 }
11492
11493 addr = isec->output_offset + isec->output_section->vma;
11494 off = addr - htab->toc_curr;
11495 limit = 0x80008000;
11496 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
11497 limit = 0x10000;
11498 if (off + isec->size > limit)
11499 {
11500 addr = (htab->toc_first_sec->output_offset
11501 + htab->toc_first_sec->output_section->vma);
11502 htab->toc_curr = addr;
11503 htab->toc_curr &= -TOC_BASE_ALIGN;
11504 }
11505
11506 /* toc_curr is the base address of this toc group. Set elf_gp
11507 for the input section to be the offset relative to the
11508 output toc base plus 0x8000. Making the input elf_gp an
11509 offset allows us to move the toc as a whole without
11510 recalculating input elf_gp. */
11511 off = htab->toc_curr - elf_gp (isec->output_section->owner);
11512 off += TOC_BASE_OFF;
11513
11514 /* Die if someone uses a linker script that doesn't keep input
11515 file .toc and .got together. */
11516 if (new_bfd
11517 && elf_gp (isec->owner) != 0
11518 && elf_gp (isec->owner) != off)
11519 return FALSE;
11520
11521 elf_gp (isec->owner) = off;
11522 return TRUE;
11523 }
11524
11525 /* During the second pass toc_first_sec points to the start of
11526 a toc group, and toc_curr is used to track the old elf_gp.
11527 We use toc_bfd to ensure we only look at each bfd once. */
11528 if (htab->toc_bfd == isec->owner)
11529 return TRUE;
11530 htab->toc_bfd = isec->owner;
11531
11532 if (htab->toc_first_sec == NULL
11533 || htab->toc_curr != elf_gp (isec->owner))
11534 {
11535 htab->toc_curr = elf_gp (isec->owner);
11536 htab->toc_first_sec = isec;
11537 }
11538 addr = (htab->toc_first_sec->output_offset
11539 + htab->toc_first_sec->output_section->vma);
11540 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
11541 elf_gp (isec->owner) = off;
11542
11543 return TRUE;
11544}
11545
11546/* Called via elf_link_hash_traverse to merge GOT entries for global
11547 symbol H. */
11548
11549static bfd_boolean
11550merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11551{
11552 if (h->root.type == bfd_link_hash_indirect)
11553 return TRUE;
11554
11555 merge_got_entries (&h->got.glist);
11556
11557 return TRUE;
11558}
11559
11560/* Called via elf_link_hash_traverse to allocate GOT entries for global
11561 symbol H. */
11562
11563static bfd_boolean
11564reallocate_got (struct elf_link_hash_entry *h, void *inf)
11565{
11566 struct got_entry *gent;
11567
11568 if (h->root.type == bfd_link_hash_indirect)
11569 return TRUE;
11570
11571 for (gent = h->got.glist; gent != NULL; gent = gent->next)
11572 if (!gent->is_indirect)
11573 allocate_got (h, (struct bfd_link_info *) inf, gent);
11574 return TRUE;
11575}
11576
11577/* Called on the first multitoc pass after the last call to
11578 ppc64_elf_next_toc_section. This function removes duplicate GOT
11579 entries. */
11580
11581bfd_boolean
11582ppc64_elf_layout_multitoc (struct bfd_link_info *info)
11583{
11584 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11585 struct bfd *ibfd, *ibfd2;
11586 bfd_boolean done_something;
11587
11588 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
11589
11590 if (!htab->do_multi_toc)
11591 return FALSE;
11592
11593 /* Merge global sym got entries within a toc group. */
11594 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
11595
11596 /* And tlsld_got. */
11597 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11598 {
11599 struct got_entry *ent, *ent2;
11600
11601 if (!is_ppc64_elf (ibfd))
11602 continue;
11603
11604 ent = ppc64_tlsld_got (ibfd);
11605 if (!ent->is_indirect
11606 && ent->got.offset != (bfd_vma) -1)
11607 {
11608 for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next)
11609 {
11610 if (!is_ppc64_elf (ibfd2))
11611 continue;
11612
11613 ent2 = ppc64_tlsld_got (ibfd2);
11614 if (!ent2->is_indirect
11615 && ent2->got.offset != (bfd_vma) -1
11616 && elf_gp (ibfd2) == elf_gp (ibfd))
11617 {
11618 ent2->is_indirect = TRUE;
11619 ent2->got.ent = ent;
11620 }
11621 }
11622 }
11623 }
11624
11625 /* Zap sizes of got sections. */
11626 htab->elf.irelplt->rawsize = htab->elf.irelplt->size;
11627 htab->elf.irelplt->size -= htab->got_reli_size;
11628 htab->got_reli_size = 0;
11629
11630 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11631 {
11632 asection *got, *relgot;
11633
11634 if (!is_ppc64_elf (ibfd))
11635 continue;
11636
11637 got = ppc64_elf_tdata (ibfd)->got;
11638 if (got != NULL)
11639 {
11640 got->rawsize = got->size;
11641 got->size = 0;
11642 relgot = ppc64_elf_tdata (ibfd)->relgot;
11643 relgot->rawsize = relgot->size;
11644 relgot->size = 0;
11645 }
11646 }
11647
11648 /* Now reallocate the got, local syms first. We don't need to
11649 allocate section contents again since we never increase size. */
11650 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11651 {
11652 struct got_entry **lgot_ents;
11653 struct got_entry **end_lgot_ents;
11654 struct plt_entry **local_plt;
11655 struct plt_entry **end_local_plt;
11656 unsigned char *lgot_masks;
11657 bfd_size_type locsymcount;
11658 Elf_Internal_Shdr *symtab_hdr;
11659 asection *s;
11660
11661 if (!is_ppc64_elf (ibfd))
11662 continue;
11663
11664 lgot_ents = elf_local_got_ents (ibfd);
11665 if (!lgot_ents)
11666 continue;
11667
11668 symtab_hdr = &elf_symtab_hdr (ibfd);
11669 locsymcount = symtab_hdr->sh_info;
11670 end_lgot_ents = lgot_ents + locsymcount;
11671 local_plt = (struct plt_entry **) end_lgot_ents;
11672 end_local_plt = local_plt + locsymcount;
11673 lgot_masks = (unsigned char *) end_local_plt;
11674 s = ppc64_elf_tdata (ibfd)->got;
11675 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
11676 {
11677 struct got_entry *ent;
11678
11679 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
11680 {
11681 unsigned int ent_size = 8;
11682 unsigned int rel_size = sizeof (Elf64_External_Rela);
11683
11684 ent->got.offset = s->size;
11685 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
11686 {
11687 ent_size *= 2;
11688 rel_size *= 2;
11689 }
11690 s->size += ent_size;
11691 if ((*lgot_masks & PLT_IFUNC) != 0)
11692 {
11693 htab->elf.irelplt->size += rel_size;
11694 htab->got_reli_size += rel_size;
11695 }
11696 else if (bfd_link_pic (info))
11697 {
11698 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11699 srel->size += rel_size;
11700 }
11701 }
11702 }
11703 }
11704
11705 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
11706
11707 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11708 {
11709 struct got_entry *ent;
11710
11711 if (!is_ppc64_elf (ibfd))
11712 continue;
11713
11714 ent = ppc64_tlsld_got (ibfd);
11715 if (!ent->is_indirect
11716 && ent->got.offset != (bfd_vma) -1)
11717 {
11718 asection *s = ppc64_elf_tdata (ibfd)->got;
11719 ent->got.offset = s->size;
11720 s->size += 16;
11721 if (bfd_link_pic (info))
11722 {
11723 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11724 srel->size += sizeof (Elf64_External_Rela);
11725 }
11726 }
11727 }
11728
11729 done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size;
11730 if (!done_something)
11731 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
11732 {
11733 asection *got;
11734
11735 if (!is_ppc64_elf (ibfd))
11736 continue;
11737
11738 got = ppc64_elf_tdata (ibfd)->got;
11739 if (got != NULL)
11740 {
11741 done_something = got->rawsize != got->size;
11742 if (done_something)
11743 break;
11744 }
11745 }
11746
11747 if (done_something)
11748 (*htab->params->layout_sections_again) ();
11749
11750 /* Set up for second pass over toc sections to recalculate elf_gp
11751 on input sections. */
11752 htab->toc_bfd = NULL;
11753 htab->toc_first_sec = NULL;
11754 htab->second_toc_pass = TRUE;
11755 return done_something;
11756}
11757
11758/* Called after second pass of multitoc partitioning. */
11759
11760void
11761ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11762{
11763 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11764
11765 /* After the second pass, toc_curr tracks the TOC offset used
11766 for code sections below in ppc64_elf_next_input_section. */
11767 htab->toc_curr = TOC_BASE_OFF;
11768}
11769
11770/* No toc references were found in ISEC. If the code in ISEC makes no
11771 calls, then there's no need to use toc adjusting stubs when branching
11772 into ISEC. Actually, indirect calls from ISEC are OK as they will
11773 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11774 needed, and 2 if a cyclical call-graph was found but no other reason
11775 for a stub was detected. If called from the top level, a return of
11776 2 means the same as a return of 0. */
11777
11778static int
11779toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11780{
11781 int ret;
11782
11783 /* Mark this section as checked. */
11784 isec->call_check_done = 1;
11785
11786 /* We know none of our code bearing sections will need toc stubs. */
11787 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11788 return 0;
11789
11790 if (isec->size == 0)
11791 return 0;
11792
11793 if (isec->output_section == NULL)
11794 return 0;
11795
11796 ret = 0;
11797 if (isec->reloc_count != 0)
11798 {
11799 Elf_Internal_Rela *relstart, *rel;
11800 Elf_Internal_Sym *local_syms;
11801 struct ppc_link_hash_table *htab;
11802
11803 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11804 info->keep_memory);
11805 if (relstart == NULL)
11806 return -1;
11807
11808 /* Look for branches to outside of this section. */
11809 local_syms = NULL;
11810 htab = ppc_hash_table (info);
11811 if (htab == NULL)
11812 return -1;
11813
11814 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11815 {
11816 enum elf_ppc64_reloc_type r_type;
11817 unsigned long r_symndx;
11818 struct elf_link_hash_entry *h;
11819 struct ppc_link_hash_entry *eh;
11820 Elf_Internal_Sym *sym;
11821 asection *sym_sec;
11822 struct _opd_sec_data *opd;
11823 bfd_vma sym_value;
11824 bfd_vma dest;
11825
11826 r_type = ELF64_R_TYPE (rel->r_info);
11827 if (r_type != R_PPC64_REL24
11828 && r_type != R_PPC64_REL14
11829 && r_type != R_PPC64_REL14_BRTAKEN
11830 && r_type != R_PPC64_REL14_BRNTAKEN)
11831 continue;
11832
11833 r_symndx = ELF64_R_SYM (rel->r_info);
11834 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11835 isec->owner))
11836 {
11837 ret = -1;
11838 break;
11839 }
11840
11841 /* Calls to dynamic lib functions go through a plt call stub
11842 that uses r2. */
11843 eh = (struct ppc_link_hash_entry *) h;
11844 if (eh != NULL
11845 && (eh->elf.plt.plist != NULL
11846 || (eh->oh != NULL
11847 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11848 {
11849 ret = 1;
11850 break;
11851 }
11852
11853 if (sym_sec == NULL)
11854 /* Ignore other undefined symbols. */
11855 continue;
11856
11857 /* Assume branches to other sections not included in the
11858 link need stubs too, to cover -R and absolute syms. */
11859 if (sym_sec->output_section == NULL)
11860 {
11861 ret = 1;
11862 break;
11863 }
11864
11865 if (h == NULL)
11866 sym_value = sym->st_value;
11867 else
11868 {
11869 if (h->root.type != bfd_link_hash_defined
11870 && h->root.type != bfd_link_hash_defweak)
11871 abort ();
11872 sym_value = h->root.u.def.value;
11873 }
11874 sym_value += rel->r_addend;
11875
11876 /* If this branch reloc uses an opd sym, find the code section. */
11877 opd = get_opd_info (sym_sec);
11878 if (opd != NULL)
11879 {
11880 if (h == NULL && opd->adjust != NULL)
11881 {
11882 long adjust;
11883
11884 adjust = opd->adjust[OPD_NDX (sym_value)];
11885 if (adjust == -1)
11886 /* Assume deleted functions won't ever be called. */
11887 continue;
11888 sym_value += adjust;
11889 }
11890
11891 dest = opd_entry_value (sym_sec, sym_value,
11892 &sym_sec, NULL, FALSE);
11893 if (dest == (bfd_vma) -1)
11894 continue;
11895 }
11896 else
11897 dest = (sym_value
11898 + sym_sec->output_offset
11899 + sym_sec->output_section->vma);
11900
11901 /* Ignore branch to self. */
11902 if (sym_sec == isec)
11903 continue;
11904
11905 /* If the called function uses the toc, we need a stub. */
11906 if (sym_sec->has_toc_reloc
11907 || sym_sec->makes_toc_func_call)
11908 {
11909 ret = 1;
11910 break;
11911 }
11912
11913 /* Assume any branch that needs a long branch stub might in fact
11914 need a plt_branch stub. A plt_branch stub uses r2. */
11915 else if (dest - (isec->output_offset
11916 + isec->output_section->vma
11917 + rel->r_offset) + (1 << 25)
11918 >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h
11919 ? h->other
11920 : sym->st_other))
11921 {
11922 ret = 1;
11923 break;
11924 }
11925
11926 /* If calling back to a section in the process of being
11927 tested, we can't say for sure that no toc adjusting stubs
11928 are needed, so don't return zero. */
11929 else if (sym_sec->call_check_in_progress)
11930 ret = 2;
11931
11932 /* Branches to another section that itself doesn't have any TOC
11933 references are OK. Recursively call ourselves to check. */
11934 else if (!sym_sec->call_check_done)
11935 {
11936 int recur;
11937
11938 /* Mark current section as indeterminate, so that other
11939 sections that call back to current won't be marked as
11940 known. */
11941 isec->call_check_in_progress = 1;
11942 recur = toc_adjusting_stub_needed (info, sym_sec);
11943 isec->call_check_in_progress = 0;
11944
11945 if (recur != 0)
11946 {
11947 ret = recur;
11948 if (recur != 2)
11949 break;
11950 }
11951 }
11952 }
11953
11954 if (local_syms != NULL
11955 && (elf_symtab_hdr (isec->owner).contents
11956 != (unsigned char *) local_syms))
11957 free (local_syms);
11958 if (elf_section_data (isec)->relocs != relstart)
11959 free (relstart);
11960 }
11961
11962 if ((ret & 1) == 0
11963 && isec->map_head.s != NULL
11964 && (strcmp (isec->output_section->name, ".init") == 0
11965 || strcmp (isec->output_section->name, ".fini") == 0))
11966 {
11967 if (isec->map_head.s->has_toc_reloc
11968 || isec->map_head.s->makes_toc_func_call)
11969 ret = 1;
11970 else if (!isec->map_head.s->call_check_done)
11971 {
11972 int recur;
11973 isec->call_check_in_progress = 1;
11974 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11975 isec->call_check_in_progress = 0;
11976 if (recur != 0)
11977 ret = recur;
11978 }
11979 }
11980
11981 if (ret == 1)
11982 isec->makes_toc_func_call = 1;
11983
11984 return ret;
11985}
11986
11987/* The linker repeatedly calls this function for each input section,
11988 in the order that input sections are linked into output sections.
11989 Build lists of input sections to determine groupings between which
11990 we may insert linker stubs. */
11991
11992bfd_boolean
11993ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11994{
11995 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11996
11997 if (htab == NULL)
11998 return FALSE;
11999
12000 if ((isec->output_section->flags & SEC_CODE) != 0
12001 && isec->output_section->id < htab->sec_info_arr_size)
12002 {
12003 /* This happens to make the list in reverse order,
12004 which is what we want. */
12005 htab->sec_info[isec->id].u.list
12006 = htab->sec_info[isec->output_section->id].u.list;
12007 htab->sec_info[isec->output_section->id].u.list = isec;
12008 }
12009
12010 if (htab->multi_toc_needed)
12011 {
12012 /* Analyse sections that aren't already flagged as needing a
12013 valid toc pointer. Exclude .fixup for the linux kernel.
12014 .fixup contains branches, but only back to the function that
12015 hit an exception. */
12016 if (!(isec->has_toc_reloc
12017 || (isec->flags & SEC_CODE) == 0
12018 || strcmp (isec->name, ".fixup") == 0
12019 || isec->call_check_done))
12020 {
12021 if (toc_adjusting_stub_needed (info, isec) < 0)
12022 return FALSE;
12023 }
12024 /* Make all sections use the TOC assigned for this object file.
12025 This will be wrong for pasted sections; We fix that in
12026 check_pasted_section(). */
12027 if (elf_gp (isec->owner) != 0)
12028 htab->toc_curr = elf_gp (isec->owner);
12029 }
12030
12031 htab->sec_info[isec->id].toc_off = htab->toc_curr;
12032 return TRUE;
12033}
12034
12035/* Check that all .init and .fini sections use the same toc, if they
12036 have toc relocs. */
12037
12038static bfd_boolean
12039check_pasted_section (struct bfd_link_info *info, const char *name)
12040{
12041 asection *o = bfd_get_section_by_name (info->output_bfd, name);
12042
12043 if (o != NULL)
12044 {
12045 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12046 bfd_vma toc_off = 0;
12047 asection *i;
12048
12049 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12050 if (i->has_toc_reloc)
12051 {
12052 if (toc_off == 0)
12053 toc_off = htab->sec_info[i->id].toc_off;
12054 else if (toc_off != htab->sec_info[i->id].toc_off)
12055 return FALSE;
12056 }
12057
12058 if (toc_off == 0)
12059 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12060 if (i->makes_toc_func_call)
12061 {
12062 toc_off = htab->sec_info[i->id].toc_off;
12063 break;
12064 }
12065
12066 /* Make sure the whole pasted function uses the same toc offset. */
12067 if (toc_off != 0)
12068 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
12069 htab->sec_info[i->id].toc_off = toc_off;
12070 }
12071 return TRUE;
12072}
12073
12074bfd_boolean
12075ppc64_elf_check_init_fini (struct bfd_link_info *info)
12076{
12077 return (check_pasted_section (info, ".init")
12078 & check_pasted_section (info, ".fini"));
12079}
12080
12081/* See whether we can group stub sections together. Grouping stub
12082 sections may result in fewer stubs. More importantly, we need to
12083 put all .init* and .fini* stubs at the beginning of the .init or
12084 .fini output sections respectively, because glibc splits the
12085 _init and _fini functions into multiple parts. Putting a stub in
12086 the middle of a function is not a good idea. */
12087
12088static bfd_boolean
12089group_sections (struct bfd_link_info *info,
12090 bfd_size_type stub_group_size,
12091 bfd_boolean stubs_always_before_branch)
12092{
12093 struct ppc_link_hash_table *htab;
12094 asection *osec;
12095 bfd_boolean suppress_size_errors;
12096
12097 htab = ppc_hash_table (info);
12098 if (htab == NULL)
12099 return FALSE;
12100
12101 suppress_size_errors = FALSE;
12102 if (stub_group_size == 1)
12103 {
12104 /* Default values. */
12105 if (stubs_always_before_branch)
12106 stub_group_size = 0x1e00000;
12107 else
12108 stub_group_size = 0x1c00000;
12109 suppress_size_errors = TRUE;
12110 }
12111
12112 for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next)
12113 {
12114 asection *tail;
12115
12116 if (osec->id >= htab->sec_info_arr_size)
12117 continue;
12118
12119 tail = htab->sec_info[osec->id].u.list;
12120 while (tail != NULL)
12121 {
12122 asection *curr;
12123 asection *prev;
12124 bfd_size_type total;
12125 bfd_boolean big_sec;
12126 bfd_vma curr_toc;
12127 struct map_stub *group;
12128 bfd_size_type group_size;
12129
12130 curr = tail;
12131 total = tail->size;
12132 group_size = (ppc64_elf_section_data (tail) != NULL
12133 && ppc64_elf_section_data (tail)->has_14bit_branch
12134 ? stub_group_size >> 10 : stub_group_size);
12135
12136 big_sec = total > group_size;
12137 if (big_sec && !suppress_size_errors)
12138 /* xgettext:c-format */
12139 _bfd_error_handler (_("%B section %A exceeds stub group size"),
12140 tail->owner, tail);
12141 curr_toc = htab->sec_info[tail->id].toc_off;
12142
12143 while ((prev = htab->sec_info[curr->id].u.list) != NULL
12144 && ((total += curr->output_offset - prev->output_offset)
12145 < (ppc64_elf_section_data (prev) != NULL
12146 && ppc64_elf_section_data (prev)->has_14bit_branch
12147 ? (group_size = stub_group_size >> 10) : group_size))
12148 && htab->sec_info[prev->id].toc_off == curr_toc)
12149 curr = prev;
12150
12151 /* OK, the size from the start of CURR to the end is less
12152 than group_size and thus can be handled by one stub
12153 section. (or the tail section is itself larger than
12154 group_size, in which case we may be toast.) We should
12155 really be keeping track of the total size of stubs added
12156 here, as stubs contribute to the final output section
12157 size. That's a little tricky, and this way will only
12158 break if stubs added make the total size more than 2^25,
12159 ie. for the default stub_group_size, if stubs total more
12160 than 2097152 bytes, or nearly 75000 plt call stubs. */
12161 group = bfd_alloc (curr->owner, sizeof (*group));
12162 if (group == NULL)
12163 return FALSE;
12164 group->link_sec = curr;
12165 group->stub_sec = NULL;
12166 group->needs_save_res = 0;
12167 group->next = htab->group;
12168 htab->group = group;
12169 do
12170 {
12171 prev = htab->sec_info[tail->id].u.list;
12172 /* Set up this stub group. */
12173 htab->sec_info[tail->id].u.group = group;
12174 }
12175 while (tail != curr && (tail = prev) != NULL);
12176
12177 /* But wait, there's more! Input sections up to group_size
12178 bytes before the stub section can be handled by it too.
12179 Don't do this if we have a really large section after the
12180 stubs, as adding more stubs increases the chance that
12181 branches may not reach into the stub section. */
12182 if (!stubs_always_before_branch && !big_sec)
12183 {
12184 total = 0;
12185 while (prev != NULL
12186 && ((total += tail->output_offset - prev->output_offset)
12187 < (ppc64_elf_section_data (prev) != NULL
12188 && ppc64_elf_section_data (prev)->has_14bit_branch
12189 ? (group_size = stub_group_size >> 10) : group_size))
12190 && htab->sec_info[prev->id].toc_off == curr_toc)
12191 {
12192 tail = prev;
12193 prev = htab->sec_info[tail->id].u.list;
12194 htab->sec_info[tail->id].u.group = group;
12195 }
12196 }
12197 tail = prev;
12198 }
12199 }
12200 return TRUE;
12201}
12202
12203static const unsigned char glink_eh_frame_cie[] =
12204{
12205 0, 0, 0, 16, /* length. */
12206 0, 0, 0, 0, /* id. */
12207 1, /* CIE version. */
12208 'z', 'R', 0, /* Augmentation string. */
12209 4, /* Code alignment. */
12210 0x78, /* Data alignment. */
12211 65, /* RA reg. */
12212 1, /* Augmentation size. */
12213 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
12214 DW_CFA_def_cfa, 1, 0, /* def_cfa: r1 offset 0. */
12215 0, 0, 0, 0
12216};
12217
12218/* Stripping output sections is normally done before dynamic section
12219 symbols have been allocated. This function is called later, and
12220 handles cases like htab->brlt which is mapped to its own output
12221 section. */
12222
12223static void
12224maybe_strip_output (struct bfd_link_info *info, asection *isec)
12225{
12226 if (isec->size == 0
12227 && isec->output_section->size == 0
12228 && !(isec->output_section->flags & SEC_KEEP)
12229 && !bfd_section_removed_from_list (info->output_bfd,
12230 isec->output_section)
12231 && elf_section_data (isec->output_section)->dynindx == 0)
12232 {
12233 isec->output_section->flags |= SEC_EXCLUDE;
12234 bfd_section_list_remove (info->output_bfd, isec->output_section);
12235 info->output_bfd->section_count--;
12236 }
12237}
12238
12239/* Determine and set the size of the stub section for a final link.
12240
12241 The basic idea here is to examine all the relocations looking for
12242 PC-relative calls to a target that is unreachable with a "bl"
12243 instruction. */
12244
12245bfd_boolean
12246ppc64_elf_size_stubs (struct bfd_link_info *info)
12247{
12248 bfd_size_type stub_group_size;
12249 bfd_boolean stubs_always_before_branch;
12250 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12251
12252 if (htab == NULL)
12253 return FALSE;
12254
12255 if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info))
12256 htab->params->plt_thread_safe = 1;
12257 if (!htab->opd_abi)
12258 htab->params->plt_thread_safe = 0;
12259 else if (htab->params->plt_thread_safe == -1)
12260 {
12261 static const char *const thread_starter[] =
12262 {
12263 "pthread_create",
12264 /* libstdc++ */
12265 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
12266 /* librt */
12267 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
12268 "mq_notify", "create_timer",
12269 /* libanl */
12270 "getaddrinfo_a",
12271 /* libgomp */
12272 "GOMP_parallel",
12273 "GOMP_parallel_start",
12274 "GOMP_parallel_loop_static",
12275 "GOMP_parallel_loop_static_start",
12276 "GOMP_parallel_loop_dynamic",
12277 "GOMP_parallel_loop_dynamic_start",
12278 "GOMP_parallel_loop_guided",
12279 "GOMP_parallel_loop_guided_start",
12280 "GOMP_parallel_loop_runtime",
12281 "GOMP_parallel_loop_runtime_start",
12282 "GOMP_parallel_sections",
12283 "GOMP_parallel_sections_start",
12284 /* libgo */
12285 "__go_go",
12286 };
12287 unsigned i;
12288
12289 for (i = 0; i < ARRAY_SIZE (thread_starter); i++)
12290 {
12291 struct elf_link_hash_entry *h;
12292 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
12293 FALSE, FALSE, TRUE);
12294 htab->params->plt_thread_safe = h != NULL && h->ref_regular;
12295 if (htab->params->plt_thread_safe)
12296 break;
12297 }
12298 }
12299 stubs_always_before_branch = htab->params->group_size < 0;
12300 if (htab->params->group_size < 0)
12301 stub_group_size = -htab->params->group_size;
12302 else
12303 stub_group_size = htab->params->group_size;
12304
12305 if (!group_sections (info, stub_group_size, stubs_always_before_branch))
12306 return FALSE;
12307
12308#define STUB_SHRINK_ITER 20
12309 /* Loop until no stubs added. After iteration 20 of this loop we may
12310 exit on a stub section shrinking. This is to break out of a
12311 pathological case where adding stubs on one iteration decreases
12312 section gaps (perhaps due to alignment), which then requires
12313 fewer or smaller stubs on the next iteration. */
12314
12315 while (1)
12316 {
12317 bfd *input_bfd;
12318 unsigned int bfd_indx;
12319 struct map_stub *group;
12320 asection *stub_sec;
12321
12322 htab->stub_iteration += 1;
12323
12324 for (input_bfd = info->input_bfds, bfd_indx = 0;
12325 input_bfd != NULL;
12326 input_bfd = input_bfd->link.next, bfd_indx++)
12327 {
12328 Elf_Internal_Shdr *symtab_hdr;
12329 asection *section;
12330 Elf_Internal_Sym *local_syms = NULL;
12331
12332 if (!is_ppc64_elf (input_bfd))
12333 continue;
12334
12335 /* We'll need the symbol table in a second. */
12336 symtab_hdr = &elf_symtab_hdr (input_bfd);
12337 if (symtab_hdr->sh_info == 0)
12338 continue;
12339
12340 /* Walk over each section attached to the input bfd. */
12341 for (section = input_bfd->sections;
12342 section != NULL;
12343 section = section->next)
12344 {
12345 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
12346
12347 /* If there aren't any relocs, then there's nothing more
12348 to do. */
12349 if ((section->flags & SEC_RELOC) == 0
12350 || (section->flags & SEC_ALLOC) == 0
12351 || (section->flags & SEC_LOAD) == 0
12352 || (section->flags & SEC_CODE) == 0
12353 || section->reloc_count == 0)
12354 continue;
12355
12356 /* If this section is a link-once section that will be
12357 discarded, then don't create any stubs. */
12358 if (section->output_section == NULL
12359 || section->output_section->owner != info->output_bfd)
12360 continue;
12361
12362 /* Get the relocs. */
12363 internal_relocs
12364 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
12365 info->keep_memory);
12366 if (internal_relocs == NULL)
12367 goto error_ret_free_local;
12368
12369 /* Now examine each relocation. */
12370 irela = internal_relocs;
12371 irelaend = irela + section->reloc_count;
12372 for (; irela < irelaend; irela++)
12373 {
12374 enum elf_ppc64_reloc_type r_type;
12375 unsigned int r_indx;
12376 enum ppc_stub_type stub_type;
12377 struct ppc_stub_hash_entry *stub_entry;
12378 asection *sym_sec, *code_sec;
12379 bfd_vma sym_value, code_value;
12380 bfd_vma destination;
12381 unsigned long local_off;
12382 bfd_boolean ok_dest;
12383 struct ppc_link_hash_entry *hash;
12384 struct ppc_link_hash_entry *fdh;
12385 struct elf_link_hash_entry *h;
12386 Elf_Internal_Sym *sym;
12387 char *stub_name;
12388 const asection *id_sec;
12389 struct _opd_sec_data *opd;
12390 struct plt_entry *plt_ent;
12391
12392 r_type = ELF64_R_TYPE (irela->r_info);
12393 r_indx = ELF64_R_SYM (irela->r_info);
12394
12395 if (r_type >= R_PPC64_max)
12396 {
12397 bfd_set_error (bfd_error_bad_value);
12398 goto error_ret_free_internal;
12399 }
12400
12401 /* Only look for stubs on branch instructions. */
12402 if (r_type != R_PPC64_REL24
12403 && r_type != R_PPC64_REL14
12404 && r_type != R_PPC64_REL14_BRTAKEN
12405 && r_type != R_PPC64_REL14_BRNTAKEN)
12406 continue;
12407
12408 /* Now determine the call target, its name, value,
12409 section. */
12410 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
12411 r_indx, input_bfd))
12412 goto error_ret_free_internal;
12413 hash = (struct ppc_link_hash_entry *) h;
12414
12415 ok_dest = FALSE;
12416 fdh = NULL;
12417 sym_value = 0;
12418 if (hash == NULL)
12419 {
12420 sym_value = sym->st_value;
12421 if (sym_sec != NULL
12422 && sym_sec->output_section != NULL)
12423 ok_dest = TRUE;
12424 }
12425 else if (hash->elf.root.type == bfd_link_hash_defined
12426 || hash->elf.root.type == bfd_link_hash_defweak)
12427 {
12428 sym_value = hash->elf.root.u.def.value;
12429 if (sym_sec->output_section != NULL)
12430 ok_dest = TRUE;
12431 }
12432 else if (hash->elf.root.type == bfd_link_hash_undefweak
12433 || hash->elf.root.type == bfd_link_hash_undefined)
12434 {
12435 /* Recognise an old ABI func code entry sym, and
12436 use the func descriptor sym instead if it is
12437 defined. */
12438 if (hash->elf.root.root.string[0] == '.'
12439 && hash->oh != NULL)
12440 {
12441 fdh = ppc_follow_link (hash->oh);
12442 if (fdh->elf.root.type == bfd_link_hash_defined
12443 || fdh->elf.root.type == bfd_link_hash_defweak)
12444 {
12445 sym_sec = fdh->elf.root.u.def.section;
12446 sym_value = fdh->elf.root.u.def.value;
12447 if (sym_sec->output_section != NULL)
12448 ok_dest = TRUE;
12449 }
12450 else
12451 fdh = NULL;
12452 }
12453 }
12454 else
12455 {
12456 bfd_set_error (bfd_error_bad_value);
12457 goto error_ret_free_internal;
12458 }
12459
12460 destination = 0;
12461 local_off = 0;
12462 if (ok_dest)
12463 {
12464 sym_value += irela->r_addend;
12465 destination = (sym_value
12466 + sym_sec->output_offset
12467 + sym_sec->output_section->vma);
12468 local_off = PPC64_LOCAL_ENTRY_OFFSET (hash
12469 ? hash->elf.other
12470 : sym->st_other);
12471 }
12472
12473 code_sec = sym_sec;
12474 code_value = sym_value;
12475 opd = get_opd_info (sym_sec);
12476 if (opd != NULL)
12477 {
12478 bfd_vma dest;
12479
12480 if (hash == NULL && opd->adjust != NULL)
12481 {
12482 long adjust = opd->adjust[OPD_NDX (sym_value)];
12483 if (adjust == -1)
12484 continue;
12485 code_value += adjust;
12486 sym_value += adjust;
12487 }
12488 dest = opd_entry_value (sym_sec, sym_value,
12489 &code_sec, &code_value, FALSE);
12490 if (dest != (bfd_vma) -1)
12491 {
12492 destination = dest;
12493 if (fdh != NULL)
12494 {
12495 /* Fixup old ABI sym to point at code
12496 entry. */
12497 hash->elf.root.type = bfd_link_hash_defweak;
12498 hash->elf.root.u.def.section = code_sec;
12499 hash->elf.root.u.def.value = code_value;
12500 }
12501 }
12502 }
12503
12504 /* Determine what (if any) linker stub is needed. */
12505 plt_ent = NULL;
12506 stub_type = ppc_type_of_stub (section, irela, &hash,
12507 &plt_ent, destination,
12508 local_off);
12509
12510 if (stub_type != ppc_stub_plt_call)
12511 {
12512 /* Check whether we need a TOC adjusting stub.
12513 Since the linker pastes together pieces from
12514 different object files when creating the
12515 _init and _fini functions, it may be that a
12516 call to what looks like a local sym is in
12517 fact a call needing a TOC adjustment. */
12518 if (code_sec != NULL
12519 && code_sec->output_section != NULL
12520 && (htab->sec_info[code_sec->id].toc_off
12521 != htab->sec_info[section->id].toc_off)
12522 && (code_sec->has_toc_reloc
12523 || code_sec->makes_toc_func_call))
12524 stub_type = ppc_stub_long_branch_r2off;
12525 }
12526
12527 if (stub_type == ppc_stub_none)
12528 continue;
12529
12530 /* __tls_get_addr calls might be eliminated. */
12531 if (stub_type != ppc_stub_plt_call
12532 && hash != NULL
12533 && (hash == htab->tls_get_addr
12534 || hash == htab->tls_get_addr_fd)
12535 && section->has_tls_reloc
12536 && irela != internal_relocs)
12537 {
12538 /* Get tls info. */
12539 unsigned char *tls_mask;
12540
12541 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
12542 irela - 1, input_bfd))
12543 goto error_ret_free_internal;
12544 if (*tls_mask != 0)
12545 continue;
12546 }
12547
12548 if (stub_type == ppc_stub_plt_call
12549 && irela + 1 < irelaend
12550 && irela[1].r_offset == irela->r_offset + 4
12551 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
12552 {
12553 if (!tocsave_find (htab, INSERT,
12554 &local_syms, irela + 1, input_bfd))
12555 goto error_ret_free_internal;
12556 }
12557 else if (stub_type == ppc_stub_plt_call)
12558 stub_type = ppc_stub_plt_call_r2save;
12559
12560 /* Support for grouping stub sections. */
12561 id_sec = htab->sec_info[section->id].u.group->link_sec;
12562
12563 /* Get the name of this stub. */
12564 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
12565 if (!stub_name)
12566 goto error_ret_free_internal;
12567
12568 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
12569 stub_name, FALSE, FALSE);
12570 if (stub_entry != NULL)
12571 {
12572 /* The proper stub has already been created. */
12573 free (stub_name);
12574 if (stub_type == ppc_stub_plt_call_r2save)
12575 stub_entry->stub_type = stub_type;
12576 continue;
12577 }
12578
12579 stub_entry = ppc_add_stub (stub_name, section, info);
12580 if (stub_entry == NULL)
12581 {
12582 free (stub_name);
12583 error_ret_free_internal:
12584 if (elf_section_data (section)->relocs == NULL)
12585 free (internal_relocs);
12586 error_ret_free_local:
12587 if (local_syms != NULL
12588 && (symtab_hdr->contents
12589 != (unsigned char *) local_syms))
12590 free (local_syms);
12591 return FALSE;
12592 }
12593
12594 stub_entry->stub_type = stub_type;
12595 if (stub_type != ppc_stub_plt_call
12596 && stub_type != ppc_stub_plt_call_r2save)
12597 {
12598 stub_entry->target_value = code_value;
12599 stub_entry->target_section = code_sec;
12600 }
12601 else
12602 {
12603 stub_entry->target_value = sym_value;
12604 stub_entry->target_section = sym_sec;
12605 }
12606 stub_entry->h = hash;
12607 stub_entry->plt_ent = plt_ent;
12608 stub_entry->other = hash ? hash->elf.other : sym->st_other;
12609
12610 if (stub_entry->h != NULL)
12611 htab->stub_globals += 1;
12612 }
12613
12614 /* We're done with the internal relocs, free them. */
12615 if (elf_section_data (section)->relocs != internal_relocs)
12616 free (internal_relocs);
12617 }
12618
12619 if (local_syms != NULL
12620 && symtab_hdr->contents != (unsigned char *) local_syms)
12621 {
12622 if (!info->keep_memory)
12623 free (local_syms);
12624 else
12625 symtab_hdr->contents = (unsigned char *) local_syms;
12626 }
12627 }
12628
12629 /* We may have added some stubs. Find out the new size of the
12630 stub sections. */
12631 for (stub_sec = htab->params->stub_bfd->sections;
12632 stub_sec != NULL;
12633 stub_sec = stub_sec->next)
12634 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12635 {
12636 if (htab->stub_iteration <= STUB_SHRINK_ITER
12637 || stub_sec->rawsize < stub_sec->size)
12638 /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */
12639 stub_sec->rawsize = stub_sec->size;
12640 stub_sec->size = 0;
12641 stub_sec->reloc_count = 0;
12642 stub_sec->flags &= ~SEC_RELOC;
12643 }
12644
12645 htab->brlt->size = 0;
12646 htab->brlt->reloc_count = 0;
12647 htab->brlt->flags &= ~SEC_RELOC;
12648 if (htab->relbrlt != NULL)
12649 htab->relbrlt->size = 0;
12650
12651 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
12652
12653 for (group = htab->group; group != NULL; group = group->next)
12654 if (group->needs_save_res)
12655 group->stub_sec->size += htab->sfpr->size;
12656
12657 if (info->emitrelocations
12658 && htab->glink != NULL && htab->glink->size != 0)
12659 {
12660 htab->glink->reloc_count = 1;
12661 htab->glink->flags |= SEC_RELOC;
12662 }
12663
12664 if (htab->glink_eh_frame != NULL
12665 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
12666 && htab->glink_eh_frame->output_section->size != 0)
12667 {
12668 size_t size = 0, align;
12669
12670 for (stub_sec = htab->params->stub_bfd->sections;
12671 stub_sec != NULL;
12672 stub_sec = stub_sec->next)
12673 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12674 size += 24;
12675 if (htab->glink != NULL && htab->glink->size != 0)
12676 size += 24;
12677 if (size != 0)
12678 size += sizeof (glink_eh_frame_cie);
12679 align = 1;
12680 align <<= htab->glink_eh_frame->output_section->alignment_power;
12681 align -= 1;
12682 size = (size + align) & ~align;
12683 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12684 htab->glink_eh_frame->size = size;
12685 }
12686
12687 if (htab->params->plt_stub_align != 0)
12688 for (stub_sec = htab->params->stub_bfd->sections;
12689 stub_sec != NULL;
12690 stub_sec = stub_sec->next)
12691 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12692 stub_sec->size = ((stub_sec->size
12693 + (1 << htab->params->plt_stub_align) - 1)
12694 & -(1 << htab->params->plt_stub_align));
12695
12696 for (stub_sec = htab->params->stub_bfd->sections;
12697 stub_sec != NULL;
12698 stub_sec = stub_sec->next)
12699 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12700 && stub_sec->rawsize != stub_sec->size
12701 && (htab->stub_iteration <= STUB_SHRINK_ITER
12702 || stub_sec->rawsize < stub_sec->size))
12703 break;
12704
12705 if (stub_sec == NULL
12706 && (htab->glink_eh_frame == NULL
12707 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
12708 break;
12709
12710 /* Ask the linker to do its stuff. */
12711 (*htab->params->layout_sections_again) ();
12712 }
12713
12714 if (htab->glink_eh_frame != NULL
12715 && htab->glink_eh_frame->size != 0)
12716 {
12717 bfd_vma val;
12718 bfd_byte *p, *last_fde;
12719 size_t last_fde_len, size, align, pad;
12720 asection *stub_sec;
12721
12722 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12723 if (p == NULL)
12724 return FALSE;
12725 htab->glink_eh_frame->contents = p;
12726 last_fde = p;
12727
12728 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12729 /* CIE length (rewrite in case little-endian). */
12730 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12731 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12732 p += sizeof (glink_eh_frame_cie);
12733
12734 for (stub_sec = htab->params->stub_bfd->sections;
12735 stub_sec != NULL;
12736 stub_sec = stub_sec->next)
12737 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12738 {
12739 last_fde = p;
12740 last_fde_len = 20;
12741 /* FDE length. */
12742 bfd_put_32 (htab->elf.dynobj, 20, p);
12743 p += 4;
12744 /* CIE pointer. */
12745 val = p - htab->glink_eh_frame->contents;
12746 bfd_put_32 (htab->elf.dynobj, val, p);
12747 p += 4;
12748 /* Offset to stub section, written later. */
12749 p += 4;
12750 /* stub section size. */
12751 bfd_put_32 (htab->elf.dynobj, stub_sec->size, p);
12752 p += 4;
12753 /* Augmentation. */
12754 p += 1;
12755 /* Pad. */
12756 p += 7;
12757 }
12758 if (htab->glink != NULL && htab->glink->size != 0)
12759 {
12760 last_fde = p;
12761 last_fde_len = 20;
12762 /* FDE length. */
12763 bfd_put_32 (htab->elf.dynobj, 20, p);
12764 p += 4;
12765 /* CIE pointer. */
12766 val = p - htab->glink_eh_frame->contents;
12767 bfd_put_32 (htab->elf.dynobj, val, p);
12768 p += 4;
12769 /* Offset to .glink, written later. */
12770 p += 4;
12771 /* .glink size. */
12772 bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p);
12773 p += 4;
12774 /* Augmentation. */
12775 p += 1;
12776
12777 *p++ = DW_CFA_advance_loc + 1;
12778 *p++ = DW_CFA_register;
12779 *p++ = 65;
12780 *p++ = htab->opd_abi ? 12 : 0;
12781 *p++ = DW_CFA_advance_loc + 4;
12782 *p++ = DW_CFA_restore_extended;
12783 *p++ = 65;
12784 }
12785 /* Subsume any padding into the last FDE if user .eh_frame
12786 sections are aligned more than glink_eh_frame. Otherwise any
12787 zero padding will be seen as a terminator. */
12788 size = p - htab->glink_eh_frame->contents;
12789 align = 1;
12790 align <<= htab->glink_eh_frame->output_section->alignment_power;
12791 align -= 1;
12792 pad = ((size + align) & ~align) - size;
12793 htab->glink_eh_frame->size = size + pad;
12794 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12795 }
12796
12797 maybe_strip_output (info, htab->brlt);
12798 if (htab->glink_eh_frame != NULL)
12799 maybe_strip_output (info, htab->glink_eh_frame);
12800
12801 return TRUE;
12802}
12803
12804/* Called after we have determined section placement. If sections
12805 move, we'll be called again. Provide a value for TOCstart. */
12806
12807bfd_vma
12808ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
12809{
12810 asection *s;
12811 bfd_vma TOCstart, adjust;
12812
12813 if (info != NULL)
12814 {
12815 struct elf_link_hash_entry *h;
12816 struct elf_link_hash_table *htab = elf_hash_table (info);
12817
12818 if (is_elf_hash_table (htab)
12819 && htab->hgot != NULL)
12820 h = htab->hgot;
12821 else
12822 {
12823 h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE);
12824 if (is_elf_hash_table (htab))
12825 htab->hgot = h;
12826 }
12827 if (h != NULL
12828 && h->root.type == bfd_link_hash_defined
12829 && !h->root.linker_def
12830 && (!is_elf_hash_table (htab)
12831 || h->def_regular))
12832 {
12833 TOCstart = (h->root.u.def.value - TOC_BASE_OFF
12834 + h->root.u.def.section->output_offset
12835 + h->root.u.def.section->output_section->vma);
12836 _bfd_set_gp_value (obfd, TOCstart);
12837 return TOCstart;
12838 }
12839 }
12840
12841 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
12842 order. The TOC starts where the first of these sections starts. */
12843 s = bfd_get_section_by_name (obfd, ".got");
12844 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12845 s = bfd_get_section_by_name (obfd, ".toc");
12846 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12847 s = bfd_get_section_by_name (obfd, ".tocbss");
12848 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12849 s = bfd_get_section_by_name (obfd, ".plt");
12850 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
12851 {
12852 /* This may happen for
12853 o references to TOC base (SYM@toc / TOC[tc0]) without a
12854 .toc directive
12855 o bad linker script
12856 o --gc-sections and empty TOC sections
12857
12858 FIXME: Warn user? */
12859
12860 /* Look for a likely section. We probably won't even be
12861 using TOCstart. */
12862 for (s = obfd->sections; s != NULL; s = s->next)
12863 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12864 | SEC_EXCLUDE))
12865 == (SEC_ALLOC | SEC_SMALL_DATA))
12866 break;
12867 if (s == NULL)
12868 for (s = obfd->sections; s != NULL; s = s->next)
12869 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12870 == (SEC_ALLOC | SEC_SMALL_DATA))
12871 break;
12872 if (s == NULL)
12873 for (s = obfd->sections; s != NULL; s = s->next)
12874 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12875 == SEC_ALLOC)
12876 break;
12877 if (s == NULL)
12878 for (s = obfd->sections; s != NULL; s = s->next)
12879 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12880 break;
12881 }
12882
12883 TOCstart = 0;
12884 if (s != NULL)
12885 TOCstart = s->output_section->vma + s->output_offset;
12886
12887 /* Force alignment. */
12888 adjust = TOCstart & (TOC_BASE_ALIGN - 1);
12889 TOCstart -= adjust;
12890 _bfd_set_gp_value (obfd, TOCstart);
12891
12892 if (info != NULL && s != NULL)
12893 {
12894 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12895
12896 if (htab != NULL)
12897 {
12898 if (htab->elf.hgot != NULL)
12899 {
12900 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust;
12901 htab->elf.hgot->root.u.def.section = s;
12902 }
12903 }
12904 else
12905 {
12906 struct bfd_link_hash_entry *bh = NULL;
12907 _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL,
12908 s, TOC_BASE_OFF - adjust,
12909 NULL, FALSE, FALSE, &bh);
12910 }
12911 }
12912 return TOCstart;
12913}
12914
12915/* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to
12916 write out any global entry stubs. */
12917
12918static bfd_boolean
12919build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
12920{
12921 struct bfd_link_info *info;
12922 struct ppc_link_hash_table *htab;
12923 struct plt_entry *pent;
12924 asection *s;
12925
12926 if (h->root.type == bfd_link_hash_indirect)
12927 return TRUE;
12928
12929 if (!h->pointer_equality_needed)
12930 return TRUE;
12931
12932 if (h->def_regular)
12933 return TRUE;
12934
12935 info = inf;
12936 htab = ppc_hash_table (info);
12937 if (htab == NULL)
12938 return FALSE;
12939
12940 s = htab->glink;
12941 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
12942 if (pent->plt.offset != (bfd_vma) -1
12943 && pent->addend == 0)
12944 {
12945 bfd_byte *p;
12946 asection *plt;
12947 bfd_vma off;
12948
12949 p = s->contents + h->root.u.def.value;
12950 plt = htab->elf.splt;
12951 if (!htab->elf.dynamic_sections_created
12952 || h->dynindx == -1)
12953 plt = htab->elf.iplt;
12954 off = pent->plt.offset + plt->output_offset + plt->output_section->vma;
12955 off -= h->root.u.def.value + s->output_offset + s->output_section->vma;
12956
12957 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
12958 {
12959 info->callbacks->einfo
12960 (_("%P: linkage table error against `%T'\n"),
12961 h->root.root.string);
12962 bfd_set_error (bfd_error_bad_value);
12963 htab->stub_error = TRUE;
12964 }
12965
12966 htab->stub_count[ppc_stub_global_entry - 1] += 1;
12967 if (htab->params->emit_stub_syms)
12968 {
12969 size_t len = strlen (h->root.root.string);
12970 char *name = bfd_malloc (sizeof "12345678.global_entry." + len);
12971
12972 if (name == NULL)
12973 return FALSE;
12974
12975 sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string);
12976 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
12977 if (h == NULL)
12978 return FALSE;
12979 if (h->root.type == bfd_link_hash_new)
12980 {
12981 h->root.type = bfd_link_hash_defined;
12982 h->root.u.def.section = s;
12983 h->root.u.def.value = p - s->contents;
12984 h->ref_regular = 1;
12985 h->def_regular = 1;
12986 h->ref_regular_nonweak = 1;
12987 h->forced_local = 1;
12988 h->non_elf = 0;
12989 h->root.linker_def = 1;
12990 }
12991 }
12992
12993 if (PPC_HA (off) != 0)
12994 {
12995 bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p);
12996 p += 4;
12997 }
12998 bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p);
12999 p += 4;
13000 bfd_put_32 (s->owner, MTCTR_R12, p);
13001 p += 4;
13002 bfd_put_32 (s->owner, BCTR, p);
13003 break;
13004 }
13005 return TRUE;
13006}
13007
13008/* Build all the stubs associated with the current output file.
13009 The stubs are kept in a hash table attached to the main linker
13010 hash table. This function is called via gldelf64ppc_finish. */
13011
13012bfd_boolean
13013ppc64_elf_build_stubs (struct bfd_link_info *info,
13014 char **stats)
13015{
13016 struct ppc_link_hash_table *htab = ppc_hash_table (info);
13017 struct map_stub *group;
13018 asection *stub_sec;
13019 bfd_byte *p;
13020 int stub_sec_count = 0;
13021
13022 if (htab == NULL)
13023 return FALSE;
13024
13025 /* Allocate memory to hold the linker stubs. */
13026 for (stub_sec = htab->params->stub_bfd->sections;
13027 stub_sec != NULL;
13028 stub_sec = stub_sec->next)
13029 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
13030 && stub_sec->size != 0)
13031 {
13032 stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, stub_sec->size);
13033 if (stub_sec->contents == NULL)
13034 return FALSE;
13035 stub_sec->size = 0;
13036 }
13037
13038 if (htab->glink != NULL && htab->glink->size != 0)
13039 {
13040 unsigned int indx;
13041 bfd_vma plt0;
13042
13043 /* Build the .glink plt call stub. */
13044 if (htab->params->emit_stub_syms)
13045 {
13046 struct elf_link_hash_entry *h;
13047 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
13048 TRUE, FALSE, FALSE);
13049 if (h == NULL)
13050 return FALSE;
13051 if (h->root.type == bfd_link_hash_new)
13052 {
13053 h->root.type = bfd_link_hash_defined;
13054 h->root.u.def.section = htab->glink;
13055 h->root.u.def.value = 8;
13056 h->ref_regular = 1;
13057 h->def_regular = 1;
13058 h->ref_regular_nonweak = 1;
13059 h->forced_local = 1;
13060 h->non_elf = 0;
13061 h->root.linker_def = 1;
13062 }
13063 }
13064 plt0 = (htab->elf.splt->output_section->vma
13065 + htab->elf.splt->output_offset
13066 - 16);
13067 if (info->emitrelocations)
13068 {
13069 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
13070 if (r == NULL)
13071 return FALSE;
13072 r->r_offset = (htab->glink->output_offset
13073 + htab->glink->output_section->vma);
13074 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
13075 r->r_addend = plt0;
13076 }
13077 p = htab->glink->contents;
13078 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
13079 bfd_put_64 (htab->glink->owner, plt0, p);
13080 p += 8;
13081 if (htab->opd_abi)
13082 {
13083 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
13084 p += 4;
13085 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13086 p += 4;
13087 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13088 p += 4;
13089 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13090 p += 4;
13091 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
13092 p += 4;
13093 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13094 p += 4;
13095 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13096 p += 4;
13097 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p);
13098 p += 4;
13099 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13100 p += 4;
13101 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p);
13102 p += 4;
13103 }
13104 else
13105 {
13106 bfd_put_32 (htab->glink->owner, MFLR_R0, p);
13107 p += 4;
13108 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
13109 p += 4;
13110 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
13111 p += 4;
13112 bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p);
13113 p += 4;
13114 bfd_put_32 (htab->glink->owner, MTLR_R0, p);
13115 p += 4;
13116 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
13117 p += 4;
13118 bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p);
13119 p += 4;
13120 bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p);
13121 p += 4;
13122 bfd_put_32 (htab->glink->owner, LD_R12_0R11, p);
13123 p += 4;
13124 bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p);
13125 p += 4;
13126 bfd_put_32 (htab->glink->owner, MTCTR_R12, p);
13127 p += 4;
13128 bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p);
13129 p += 4;
13130 }
13131 bfd_put_32 (htab->glink->owner, BCTR, p);
13132 p += 4;
13133 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
13134 {
13135 bfd_put_32 (htab->glink->owner, NOP, p);
13136 p += 4;
13137 }
13138
13139 /* Build the .glink lazy link call stubs. */
13140 indx = 0;
13141 while (p < htab->glink->contents + htab->glink->rawsize)
13142 {
13143 if (htab->opd_abi)
13144 {
13145 if (indx < 0x8000)
13146 {
13147 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
13148 p += 4;
13149 }
13150 else
13151 {
13152 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
13153 p += 4;
13154 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx),
13155 p);
13156 p += 4;
13157 }
13158 }
13159 bfd_put_32 (htab->glink->owner,
13160 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
13161 indx++;
13162 p += 4;
13163 }
13164
13165 /* Build .glink global entry stubs. */
13166 if (htab->glink->size > htab->glink->rawsize)
13167 elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
13168 }
13169
13170 if (htab->brlt != NULL && htab->brlt->size != 0)
13171 {
13172 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
13173 htab->brlt->size);
13174 if (htab->brlt->contents == NULL)
13175 return FALSE;
13176 }
13177 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
13178 {
13179 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
13180 htab->relbrlt->size);
13181 if (htab->relbrlt->contents == NULL)
13182 return FALSE;
13183 }
13184
13185 /* Build the stubs as directed by the stub hash table. */
13186 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
13187
13188 for (group = htab->group; group != NULL; group = group->next)
13189 if (group->needs_save_res)
13190 {
13191 stub_sec = group->stub_sec;
13192 memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
13193 htab->sfpr->size);
13194 if (htab->params->emit_stub_syms)
13195 {
13196 unsigned int i;
13197
13198 for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
13199 if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
13200 return FALSE;
13201 }
13202 stub_sec->size += htab->sfpr->size;
13203 }
13204
13205 if (htab->relbrlt != NULL)
13206 htab->relbrlt->reloc_count = 0;
13207
13208 if (htab->params->plt_stub_align != 0)
13209 for (stub_sec = htab->params->stub_bfd->sections;
13210 stub_sec != NULL;
13211 stub_sec = stub_sec->next)
13212 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13213 stub_sec->size = ((stub_sec->size
13214 + (1 << htab->params->plt_stub_align) - 1)
13215 & -(1 << htab->params->plt_stub_align));
13216
13217 for (stub_sec = htab->params->stub_bfd->sections;
13218 stub_sec != NULL;
13219 stub_sec = stub_sec->next)
13220 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
13221 {
13222 stub_sec_count += 1;
13223 if (stub_sec->rawsize != stub_sec->size
13224 && (htab->stub_iteration <= STUB_SHRINK_ITER
13225 || stub_sec->rawsize < stub_sec->size))
13226 break;
13227 }
13228
13229 /* Note that the glink_eh_frame check here is not only testing that
13230 the generated size matched the calculated size but also that
13231 bfd_elf_discard_info didn't make any changes to the section. */
13232 if (stub_sec != NULL
13233 || (htab->glink_eh_frame != NULL
13234 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
13235 {
13236 htab->stub_error = TRUE;
13237 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
13238 }
13239
13240 if (htab->stub_error)
13241 return FALSE;
13242
13243 if (stats != NULL)
13244 {
13245 *stats = bfd_malloc (500);
13246 if (*stats == NULL)
13247 return FALSE;
13248
13249 sprintf (*stats, _("linker stubs in %u group%s\n"
13250 " branch %lu\n"
13251 " toc adjust %lu\n"
13252 " long branch %lu\n"
13253 " long toc adj %lu\n"
13254 " plt call %lu\n"
13255 " plt call toc %lu\n"
13256 " global entry %lu"),
13257 stub_sec_count,
13258 stub_sec_count == 1 ? "" : "s",
13259 htab->stub_count[ppc_stub_long_branch - 1],
13260 htab->stub_count[ppc_stub_long_branch_r2off - 1],
13261 htab->stub_count[ppc_stub_plt_branch - 1],
13262 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
13263 htab->stub_count[ppc_stub_plt_call - 1],
13264 htab->stub_count[ppc_stub_plt_call_r2save - 1],
13265 htab->stub_count[ppc_stub_global_entry - 1]);
13266 }
13267 return TRUE;
13268}
13269
13270/* What to do when ld finds relocations against symbols defined in
13271 discarded sections. */
13272
13273static unsigned int
13274ppc64_elf_action_discarded (asection *sec)
13275{
13276 if (strcmp (".opd", sec->name) == 0)
13277 return 0;
13278
13279 if (strcmp (".toc", sec->name) == 0)
13280 return 0;
13281
13282 if (strcmp (".toc1", sec->name) == 0)
13283 return 0;
13284
13285 return _bfd_elf_default_action_discarded (sec);
13286}
13287
13288/* The RELOCATE_SECTION function is called by the ELF backend linker
13289 to handle the relocations for a section.
13290
13291 The relocs are always passed as Rela structures; if the section
13292 actually uses Rel structures, the r_addend field will always be
13293 zero.
13294
13295 This function is responsible for adjust the section contents as
13296 necessary, and (if using Rela relocs and generating a
13297 relocatable output file) adjusting the reloc addend as
13298 necessary.
13299
13300 This function does not have to worry about setting the reloc
13301 address or the reloc symbol index.
13302
13303 LOCAL_SYMS is a pointer to the swapped in local symbols.
13304
13305 LOCAL_SECTIONS is an array giving the section in the input file
13306 corresponding to the st_shndx field of each local symbol.
13307
13308 The global hash table entry for the global symbols can be found
13309 via elf_sym_hashes (input_bfd).
13310
13311 When generating relocatable output, this function must handle
13312 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
13313 going to be the section symbol corresponding to the output
13314 section, which means that the addend must be adjusted
13315 accordingly. */
13316
13317static bfd_boolean
13318ppc64_elf_relocate_section (bfd *output_bfd,
13319 struct bfd_link_info *info,
13320 bfd *input_bfd,
13321 asection *input_section,
13322 bfd_byte *contents,
13323 Elf_Internal_Rela *relocs,
13324 Elf_Internal_Sym *local_syms,
13325 asection **local_sections)
13326{
13327 struct ppc_link_hash_table *htab;
13328 Elf_Internal_Shdr *symtab_hdr;
13329 struct elf_link_hash_entry **sym_hashes;
13330 Elf_Internal_Rela *rel;
13331 Elf_Internal_Rela *wrel;
13332 Elf_Internal_Rela *relend;
13333 Elf_Internal_Rela outrel;
13334 bfd_byte *loc;
13335 struct got_entry **local_got_ents;
13336 bfd_vma TOCstart;
13337 bfd_boolean ret = TRUE;
13338 bfd_boolean is_opd;
13339 /* Assume 'at' branch hints. */
13340 bfd_boolean is_isa_v2 = TRUE;
13341 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
13342
13343 /* Initialize howto table if needed. */
13344 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
13345 ppc_howto_init ();
13346
13347 htab = ppc_hash_table (info);
13348 if (htab == NULL)
13349 return FALSE;
13350
13351 /* Don't relocate stub sections. */
13352 if (input_section->owner == htab->params->stub_bfd)
13353 return TRUE;
13354
13355 BFD_ASSERT (is_ppc64_elf (input_bfd));
13356
13357 local_got_ents = elf_local_got_ents (input_bfd);
13358 TOCstart = elf_gp (output_bfd);
13359 symtab_hdr = &elf_symtab_hdr (input_bfd);
13360 sym_hashes = elf_sym_hashes (input_bfd);
13361 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
13362
13363 rel = wrel = relocs;
13364 relend = relocs + input_section->reloc_count;
13365 for (; rel < relend; wrel++, rel++)
13366 {
13367 enum elf_ppc64_reloc_type r_type;
13368 bfd_vma addend;
13369 bfd_reloc_status_type r;
13370 Elf_Internal_Sym *sym;
13371 asection *sec;
13372 struct elf_link_hash_entry *h_elf;
13373 struct ppc_link_hash_entry *h;
13374 struct ppc_link_hash_entry *fdh;
13375 const char *sym_name;
13376 unsigned long r_symndx, toc_symndx;
13377 bfd_vma toc_addend;
13378 unsigned char tls_mask, tls_gd, tls_type;
13379 unsigned char sym_type;
13380 bfd_vma relocation;
13381 bfd_boolean unresolved_reloc;
13382 bfd_boolean warned;
13383 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
13384 unsigned int insn;
13385 unsigned int mask;
13386 struct ppc_stub_hash_entry *stub_entry;
13387 bfd_vma max_br_offset;
13388 bfd_vma from;
13389 Elf_Internal_Rela orig_rel;
13390 reloc_howto_type *howto;
13391 struct reloc_howto_struct alt_howto;
13392
13393 again:
13394 orig_rel = *rel;
13395
13396 r_type = ELF64_R_TYPE (rel->r_info);
13397 r_symndx = ELF64_R_SYM (rel->r_info);
13398
13399 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
13400 symbol of the previous ADDR64 reloc. The symbol gives us the
13401 proper TOC base to use. */
13402 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
13403 && wrel != relocs
13404 && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64
13405 && is_opd)
13406 r_symndx = ELF64_R_SYM (wrel[-1].r_info);
13407
13408 sym = NULL;
13409 sec = NULL;
13410 h_elf = NULL;
13411 sym_name = NULL;
13412 unresolved_reloc = FALSE;
13413 warned = FALSE;
13414
13415 if (r_symndx < symtab_hdr->sh_info)
13416 {
13417 /* It's a local symbol. */
13418 struct _opd_sec_data *opd;
13419
13420 sym = local_syms + r_symndx;
13421 sec = local_sections[r_symndx];
13422 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
13423 sym_type = ELF64_ST_TYPE (sym->st_info);
13424 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
13425 opd = get_opd_info (sec);
13426 if (opd != NULL && opd->adjust != NULL)
13427 {
13428 long adjust = opd->adjust[OPD_NDX (sym->st_value
13429 + rel->r_addend)];
13430 if (adjust == -1)
13431 relocation = 0;
13432 else
13433 {
13434 /* If this is a relocation against the opd section sym
13435 and we have edited .opd, adjust the reloc addend so
13436 that ld -r and ld --emit-relocs output is correct.
13437 If it is a reloc against some other .opd symbol,
13438 then the symbol value will be adjusted later. */
13439 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
13440 rel->r_addend += adjust;
13441 else
13442 relocation += adjust;
13443 }
13444 }
13445 }
13446 else
13447 {
13448 bfd_boolean ignored;
13449
13450 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
13451 r_symndx, symtab_hdr, sym_hashes,
13452 h_elf, sec, relocation,
13453 unresolved_reloc, warned, ignored);
13454 sym_name = h_elf->root.root.string;
13455 sym_type = h_elf->type;
13456 if (sec != NULL
13457 && sec->owner == output_bfd
13458 && strcmp (sec->name, ".opd") == 0)
13459 {
13460 /* This is a symbol defined in a linker script. All
13461 such are defined in output sections, even those
13462 defined by simple assignment from a symbol defined in
13463 an input section. Transfer the symbol to an
13464 appropriate input .opd section, so that a branch to
13465 this symbol will be mapped to the location specified
13466 by the opd entry. */
13467 struct bfd_link_order *lo;
13468 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
13469 if (lo->type == bfd_indirect_link_order)
13470 {
13471 asection *isec = lo->u.indirect.section;
13472 if (h_elf->root.u.def.value >= isec->output_offset
13473 && h_elf->root.u.def.value < (isec->output_offset
13474 + isec->size))
13475 {
13476 h_elf->root.u.def.value -= isec->output_offset;
13477 h_elf->root.u.def.section = isec;
13478 sec = isec;
13479 break;
13480 }
13481 }
13482 }
13483 }
13484 h = (struct ppc_link_hash_entry *) h_elf;
13485
13486 if (sec != NULL && discarded_section (sec))
13487 {
13488 _bfd_clear_contents (ppc64_elf_howto_table[r_type],
13489 input_bfd, input_section,
13490 contents + rel->r_offset);
13491 wrel->r_offset = rel->r_offset;
13492 wrel->r_info = 0;
13493 wrel->r_addend = 0;
13494
13495 /* For ld -r, remove relocations in debug sections against
13496 sections defined in discarded sections. Not done for
13497 non-debug to preserve relocs in .eh_frame which the
13498 eh_frame editing code expects to be present. */
13499 if (bfd_link_relocatable (info)
13500 && (input_section->flags & SEC_DEBUGGING))
13501 wrel--;
13502
13503 continue;
13504 }
13505
13506 if (bfd_link_relocatable (info))
13507 goto copy_reloc;
13508
13509 if (h != NULL && &h->elf == htab->elf.hgot)
13510 {
13511 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13512 sec = bfd_abs_section_ptr;
13513 unresolved_reloc = FALSE;
13514 }
13515
13516 /* TLS optimizations. Replace instruction sequences and relocs
13517 based on information we collected in tls_optimize. We edit
13518 RELOCS so that --emit-relocs will output something sensible
13519 for the final instruction stream. */
13520 tls_mask = 0;
13521 tls_gd = 0;
13522 toc_symndx = 0;
13523 if (h != NULL)
13524 tls_mask = h->tls_mask;
13525 else if (local_got_ents != NULL)
13526 {
13527 struct plt_entry **local_plt = (struct plt_entry **)
13528 (local_got_ents + symtab_hdr->sh_info);
13529 unsigned char *lgot_masks = (unsigned char *)
13530 (local_plt + symtab_hdr->sh_info);
13531 tls_mask = lgot_masks[r_symndx];
13532 }
13533 if (tls_mask == 0
13534 && (r_type == R_PPC64_TLS
13535 || r_type == R_PPC64_TLSGD
13536 || r_type == R_PPC64_TLSLD))
13537 {
13538 /* Check for toc tls entries. */
13539 unsigned char *toc_tls;
13540
13541 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13542 &local_syms, rel, input_bfd))
13543 return FALSE;
13544
13545 if (toc_tls)
13546 tls_mask = *toc_tls;
13547 }
13548
13549 /* Check that tls relocs are used with tls syms, and non-tls
13550 relocs are used with non-tls syms. */
13551 if (r_symndx != STN_UNDEF
13552 && r_type != R_PPC64_NONE
13553 && (h == NULL
13554 || h->elf.root.type == bfd_link_hash_defined
13555 || h->elf.root.type == bfd_link_hash_defweak)
13556 && (IS_PPC64_TLS_RELOC (r_type)
13557 != (sym_type == STT_TLS
13558 || (sym_type == STT_SECTION
13559 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
13560 {
13561 if (tls_mask != 0
13562 && (r_type == R_PPC64_TLS
13563 || r_type == R_PPC64_TLSGD
13564 || r_type == R_PPC64_TLSLD))
13565 /* R_PPC64_TLS is OK against a symbol in the TOC. */
13566 ;
13567 else
13568 info->callbacks->einfo
13569 (!IS_PPC64_TLS_RELOC (r_type)
13570 /* xgettext:c-format */
13571 ? _("%P: %H: %s used with TLS symbol `%T'\n")
13572 /* xgettext:c-format */
13573 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
13574 input_bfd, input_section, rel->r_offset,
13575 ppc64_elf_howto_table[r_type]->name,
13576 sym_name);
13577 }
13578
13579 /* Ensure reloc mapping code below stays sane. */
13580 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
13581 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
13582 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
13583 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
13584 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
13585 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
13586 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
13587 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
13588 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
13589 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
13590 abort ();
13591
13592 switch (r_type)
13593 {
13594 default:
13595 break;
13596
13597 case R_PPC64_LO_DS_OPT:
13598 insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset);
13599 if ((insn & (0x3f << 26)) != 58u << 26)
13600 abort ();
13601 insn += (14u << 26) - (58u << 26);
13602 bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset);
13603 r_type = R_PPC64_TOC16_LO;
13604 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13605 break;
13606
13607 case R_PPC64_TOC16:
13608 case R_PPC64_TOC16_LO:
13609 case R_PPC64_TOC16_DS:
13610 case R_PPC64_TOC16_LO_DS:
13611 {
13612 /* Check for toc tls entries. */
13613 unsigned char *toc_tls;
13614 int retval;
13615
13616 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
13617 &local_syms, rel, input_bfd);
13618 if (retval == 0)
13619 return FALSE;
13620
13621 if (toc_tls)
13622 {
13623 tls_mask = *toc_tls;
13624 if (r_type == R_PPC64_TOC16_DS
13625 || r_type == R_PPC64_TOC16_LO_DS)
13626 {
13627 if (tls_mask != 0
13628 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
13629 goto toctprel;
13630 }
13631 else
13632 {
13633 /* If we found a GD reloc pair, then we might be
13634 doing a GD->IE transition. */
13635 if (retval == 2)
13636 {
13637 tls_gd = TLS_TPRELGD;
13638 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13639 goto tls_ldgd_opt;
13640 }
13641 else if (retval == 3)
13642 {
13643 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13644 goto tls_ldgd_opt;
13645 }
13646 }
13647 }
13648 }
13649 break;
13650
13651 case R_PPC64_GOT_TPREL16_HI:
13652 case R_PPC64_GOT_TPREL16_HA:
13653 if (tls_mask != 0
13654 && (tls_mask & TLS_TPREL) == 0)
13655 {
13656 rel->r_offset -= d_offset;
13657 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13658 r_type = R_PPC64_NONE;
13659 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13660 }
13661 break;
13662
13663 case R_PPC64_GOT_TPREL16_DS:
13664 case R_PPC64_GOT_TPREL16_LO_DS:
13665 if (tls_mask != 0
13666 && (tls_mask & TLS_TPREL) == 0)
13667 {
13668 toctprel:
13669 insn = bfd_get_32 (input_bfd,
13670 contents + rel->r_offset - d_offset);
13671 insn &= 31 << 21;
13672 insn |= 0x3c0d0000; /* addis 0,13,0 */
13673 bfd_put_32 (input_bfd, insn,
13674 contents + rel->r_offset - d_offset);
13675 r_type = R_PPC64_TPREL16_HA;
13676 if (toc_symndx != 0)
13677 {
13678 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13679 rel->r_addend = toc_addend;
13680 /* We changed the symbol. Start over in order to
13681 get h, sym, sec etc. right. */
13682 goto again;
13683 }
13684 else
13685 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13686 }
13687 break;
13688
13689 case R_PPC64_TLS:
13690 if (tls_mask != 0
13691 && (tls_mask & TLS_TPREL) == 0)
13692 {
13693 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13694 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
13695 if (insn == 0)
13696 abort ();
13697 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
13698 /* Was PPC64_TLS which sits on insn boundary, now
13699 PPC64_TPREL16_LO which is at low-order half-word. */
13700 rel->r_offset += d_offset;
13701 r_type = R_PPC64_TPREL16_LO;
13702 if (toc_symndx != 0)
13703 {
13704 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
13705 rel->r_addend = toc_addend;
13706 /* We changed the symbol. Start over in order to
13707 get h, sym, sec etc. right. */
13708 goto again;
13709 }
13710 else
13711 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13712 }
13713 break;
13714
13715 case R_PPC64_GOT_TLSGD16_HI:
13716 case R_PPC64_GOT_TLSGD16_HA:
13717 tls_gd = TLS_TPRELGD;
13718 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13719 goto tls_gdld_hi;
13720 break;
13721
13722 case R_PPC64_GOT_TLSLD16_HI:
13723 case R_PPC64_GOT_TLSLD16_HA:
13724 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13725 {
13726 tls_gdld_hi:
13727 if ((tls_mask & tls_gd) != 0)
13728 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13729 + R_PPC64_GOT_TPREL16_DS);
13730 else
13731 {
13732 rel->r_offset -= d_offset;
13733 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
13734 r_type = R_PPC64_NONE;
13735 }
13736 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13737 }
13738 break;
13739
13740 case R_PPC64_GOT_TLSGD16:
13741 case R_PPC64_GOT_TLSGD16_LO:
13742 tls_gd = TLS_TPRELGD;
13743 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13744 goto tls_ldgd_opt;
13745 break;
13746
13747 case R_PPC64_GOT_TLSLD16:
13748 case R_PPC64_GOT_TLSLD16_LO:
13749 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13750 {
13751 unsigned int insn1, insn2, insn3;
13752 bfd_vma offset;
13753
13754 tls_ldgd_opt:
13755 offset = (bfd_vma) -1;
13756 /* If not using the newer R_PPC64_TLSGD/LD to mark
13757 __tls_get_addr calls, we must trust that the call
13758 stays with its arg setup insns, ie. that the next
13759 reloc is the __tls_get_addr call associated with
13760 the current reloc. Edit both insns. */
13761 if (input_section->has_tls_get_addr_call
13762 && rel + 1 < relend
13763 && branch_reloc_hash_match (input_bfd, rel + 1,
13764 htab->tls_get_addr,
13765 htab->tls_get_addr_fd))
13766 offset = rel[1].r_offset;
13767 /* We read the low GOT_TLS (or TOC16) insn because we
13768 need to keep the destination reg. It may be
13769 something other than the usual r3, and moved to r3
13770 before the call by intervening code. */
13771 insn1 = bfd_get_32 (input_bfd,
13772 contents + rel->r_offset - d_offset);
13773 if ((tls_mask & tls_gd) != 0)
13774 {
13775 /* IE */
13776 insn1 &= (0x1f << 21) | (0x1f << 16);
13777 insn1 |= 58 << 26; /* ld */
13778 insn2 = 0x7c636a14; /* add 3,3,13 */
13779 if (offset != (bfd_vma) -1)
13780 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13781 if ((tls_mask & TLS_EXPLICIT) == 0)
13782 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
13783 + R_PPC64_GOT_TPREL16_DS);
13784 else
13785 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
13786 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13787 }
13788 else
13789 {
13790 /* LE */
13791 insn1 &= 0x1f << 21;
13792 insn1 |= 0x3c0d0000; /* addis r,13,0 */
13793 insn2 = 0x38630000; /* addi 3,3,0 */
13794 if (tls_gd == 0)
13795 {
13796 /* Was an LD reloc. */
13797 if (toc_symndx)
13798 sec = local_sections[toc_symndx];
13799 for (r_symndx = 0;
13800 r_symndx < symtab_hdr->sh_info;
13801 r_symndx++)
13802 if (local_sections[r_symndx] == sec)
13803 break;
13804 if (r_symndx >= symtab_hdr->sh_info)
13805 r_symndx = STN_UNDEF;
13806 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13807 if (r_symndx != STN_UNDEF)
13808 rel->r_addend -= (local_syms[r_symndx].st_value
13809 + sec->output_offset
13810 + sec->output_section->vma);
13811 }
13812 else if (toc_symndx != 0)
13813 {
13814 r_symndx = toc_symndx;
13815 rel->r_addend = toc_addend;
13816 }
13817 r_type = R_PPC64_TPREL16_HA;
13818 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13819 if (offset != (bfd_vma) -1)
13820 {
13821 rel[1].r_info = ELF64_R_INFO (r_symndx,
13822 R_PPC64_TPREL16_LO);
13823 rel[1].r_offset = offset + d_offset;
13824 rel[1].r_addend = rel->r_addend;
13825 }
13826 }
13827 bfd_put_32 (input_bfd, insn1,
13828 contents + rel->r_offset - d_offset);
13829 if (offset != (bfd_vma) -1)
13830 {
13831 insn3 = bfd_get_32 (input_bfd,
13832 contents + offset + 4);
13833 if (insn3 == NOP
13834 || insn3 == CROR_151515 || insn3 == CROR_313131)
13835 {
13836 rel[1].r_offset += 4;
13837 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13838 insn2 = NOP;
13839 }
13840 bfd_put_32 (input_bfd, insn2, contents + offset);
13841 }
13842 if ((tls_mask & tls_gd) == 0
13843 && (tls_gd == 0 || toc_symndx != 0))
13844 {
13845 /* We changed the symbol. Start over in order
13846 to get h, sym, sec etc. right. */
13847 goto again;
13848 }
13849 }
13850 break;
13851
13852 case R_PPC64_TLSGD:
13853 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
13854 {
13855 unsigned int insn2, insn3;
13856 bfd_vma offset = rel->r_offset;
13857
13858 if ((tls_mask & TLS_TPRELGD) != 0)
13859 {
13860 /* IE */
13861 r_type = R_PPC64_NONE;
13862 insn2 = 0x7c636a14; /* add 3,3,13 */
13863 }
13864 else
13865 {
13866 /* LE */
13867 if (toc_symndx != 0)
13868 {
13869 r_symndx = toc_symndx;
13870 rel->r_addend = toc_addend;
13871 }
13872 r_type = R_PPC64_TPREL16_LO;
13873 rel->r_offset = offset + d_offset;
13874 insn2 = 0x38630000; /* addi 3,3,0 */
13875 }
13876 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13877 /* Zap the reloc on the _tls_get_addr call too. */
13878 BFD_ASSERT (offset == rel[1].r_offset);
13879 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13880 insn3 = bfd_get_32 (input_bfd,
13881 contents + offset + 4);
13882 if (insn3 == NOP
13883 || insn3 == CROR_151515 || insn3 == CROR_313131)
13884 {
13885 rel->r_offset += 4;
13886 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13887 insn2 = NOP;
13888 }
13889 bfd_put_32 (input_bfd, insn2, contents + offset);
13890 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
13891 goto again;
13892 }
13893 break;
13894
13895 case R_PPC64_TLSLD:
13896 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
13897 {
13898 unsigned int insn2, insn3;
13899 bfd_vma offset = rel->r_offset;
13900
13901 if (toc_symndx)
13902 sec = local_sections[toc_symndx];
13903 for (r_symndx = 0;
13904 r_symndx < symtab_hdr->sh_info;
13905 r_symndx++)
13906 if (local_sections[r_symndx] == sec)
13907 break;
13908 if (r_symndx >= symtab_hdr->sh_info)
13909 r_symndx = STN_UNDEF;
13910 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13911 if (r_symndx != STN_UNDEF)
13912 rel->r_addend -= (local_syms[r_symndx].st_value
13913 + sec->output_offset
13914 + sec->output_section->vma);
13915
13916 r_type = R_PPC64_TPREL16_LO;
13917 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13918 rel->r_offset = offset + d_offset;
13919 /* Zap the reloc on the _tls_get_addr call too. */
13920 BFD_ASSERT (offset == rel[1].r_offset);
13921 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13922 insn2 = 0x38630000; /* addi 3,3,0 */
13923 insn3 = bfd_get_32 (input_bfd,
13924 contents + offset + 4);
13925 if (insn3 == NOP
13926 || insn3 == CROR_151515 || insn3 == CROR_313131)
13927 {
13928 rel->r_offset += 4;
13929 bfd_put_32 (input_bfd, insn2, contents + offset + 4);
13930 insn2 = NOP;
13931 }
13932 bfd_put_32 (input_bfd, insn2, contents + offset);
13933 goto again;
13934 }
13935 break;
13936
13937 case R_PPC64_DTPMOD64:
13938 if (rel + 1 < relend
13939 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13940 && rel[1].r_offset == rel->r_offset + 8)
13941 {
13942 if ((tls_mask & TLS_GD) == 0)
13943 {
13944 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13945 if ((tls_mask & TLS_TPRELGD) != 0)
13946 r_type = R_PPC64_TPREL64;
13947 else
13948 {
13949 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13950 r_type = R_PPC64_NONE;
13951 }
13952 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13953 }
13954 }
13955 else
13956 {
13957 if ((tls_mask & TLS_LD) == 0)
13958 {
13959 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13960 r_type = R_PPC64_NONE;
13961 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13962 }
13963 }
13964 break;
13965
13966 case R_PPC64_TPREL64:
13967 if ((tls_mask & TLS_TPREL) == 0)
13968 {
13969 r_type = R_PPC64_NONE;
13970 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13971 }
13972 break;
13973
13974 case R_PPC64_ENTRY:
13975 relocation = TOCstart + htab->sec_info[input_section->id].toc_off;
13976 if (!bfd_link_pic (info)
13977 && !info->traditional_format
13978 && relocation + 0x80008000 <= 0xffffffff)
13979 {
13980 unsigned int insn1, insn2;
13981
13982 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
13983 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13984 if ((insn1 & ~0xfffc) == LD_R2_0R12
13985 && insn2 == ADD_R2_R2_R12)
13986 {
13987 bfd_put_32 (input_bfd,
13988 LIS_R2 + PPC_HA (relocation),
13989 contents + rel->r_offset);
13990 bfd_put_32 (input_bfd,
13991 ADDI_R2_R2 + PPC_LO (relocation),
13992 contents + rel->r_offset + 4);
13993 }
13994 }
13995 else
13996 {
13997 relocation -= (rel->r_offset
13998 + input_section->output_offset
13999 + input_section->output_section->vma);
14000 if (relocation + 0x80008000 <= 0xffffffff)
14001 {
14002 unsigned int insn1, insn2;
14003
14004 insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset);
14005 insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
14006 if ((insn1 & ~0xfffc) == LD_R2_0R12
14007 && insn2 == ADD_R2_R2_R12)
14008 {
14009 bfd_put_32 (input_bfd,
14010 ADDIS_R2_R12 + PPC_HA (relocation),
14011 contents + rel->r_offset);
14012 bfd_put_32 (input_bfd,
14013 ADDI_R2_R2 + PPC_LO (relocation),
14014 contents + rel->r_offset + 4);
14015 }
14016 }
14017 }
14018 break;
14019
14020 case R_PPC64_REL16_HA:
14021 /* If we are generating a non-PIC executable, edit
14022 . 0: addis 2,12,.TOC.-0b@ha
14023 . addi 2,2,.TOC.-0b@l
14024 used by ELFv2 global entry points to set up r2, to
14025 . lis 2,.TOC.@ha
14026 . addi 2,2,.TOC.@l
14027 if .TOC. is in range. */
14028 if (!bfd_link_pic (info)
14029 && !info->traditional_format
14030 && !htab->opd_abi
14031 && rel->r_addend == d_offset
14032 && h != NULL && &h->elf == htab->elf.hgot
14033 && rel + 1 < relend
14034 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO)
14035 && rel[1].r_offset == rel->r_offset + 4
14036 && rel[1].r_addend == rel->r_addend + 4
14037 && relocation + 0x80008000 <= 0xffffffff)
14038 {
14039 unsigned int insn1, insn2;
14040 bfd_vma offset = rel->r_offset - d_offset;
14041 insn1 = bfd_get_32 (input_bfd, contents + offset);
14042 insn2 = bfd_get_32 (input_bfd, contents + offset + 4);
14043 if ((insn1 & 0xffff0000) == ADDIS_R2_R12
14044 && (insn2 & 0xffff0000) == ADDI_R2_R2)
14045 {
14046 r_type = R_PPC64_ADDR16_HA;
14047 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
14048 rel->r_addend -= d_offset;
14049 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO);
14050 rel[1].r_addend -= d_offset + 4;
14051 bfd_put_32 (input_bfd, LIS_R2, contents + offset);
14052 }
14053 }
14054 break;
14055 }
14056
14057 /* Handle other relocations that tweak non-addend part of insn. */
14058 insn = 0;
14059 max_br_offset = 1 << 25;
14060 addend = rel->r_addend;
14061 reloc_dest = DEST_NORMAL;
14062 switch (r_type)
14063 {
14064 default:
14065 break;
14066
14067 case R_PPC64_TOCSAVE:
14068 if (relocation + addend == (rel->r_offset
14069 + input_section->output_offset
14070 + input_section->output_section->vma)
14071 && tocsave_find (htab, NO_INSERT,
14072 &local_syms, rel, input_bfd))
14073 {
14074 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
14075 if (insn == NOP
14076 || insn == CROR_151515 || insn == CROR_313131)
14077 bfd_put_32 (input_bfd,
14078 STD_R2_0R1 + STK_TOC (htab),
14079 contents + rel->r_offset);
14080 }
14081 break;
14082
14083 /* Branch taken prediction relocations. */
14084 case R_PPC64_ADDR14_BRTAKEN:
14085 case R_PPC64_REL14_BRTAKEN:
14086 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
14087 /* Fall through. */
14088
14089 /* Branch not taken prediction relocations. */
14090 case R_PPC64_ADDR14_BRNTAKEN:
14091 case R_PPC64_REL14_BRNTAKEN:
14092 insn |= bfd_get_32 (input_bfd,
14093 contents + rel->r_offset) & ~(0x01 << 21);
14094 /* Fall through. */
14095
14096 case R_PPC64_REL14:
14097 max_br_offset = 1 << 15;
14098 /* Fall through. */
14099
14100 case R_PPC64_REL24:
14101 /* Calls to functions with a different TOC, such as calls to
14102 shared objects, need to alter the TOC pointer. This is
14103 done using a linkage stub. A REL24 branching to these
14104 linkage stubs needs to be followed by a nop, as the nop
14105 will be replaced with an instruction to restore the TOC
14106 base pointer. */
14107 fdh = h;
14108 if (h != NULL
14109 && h->oh != NULL
14110 && h->oh->is_func_descriptor)
14111 fdh = ppc_follow_link (h->oh);
14112 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
14113 htab);
14114 if (stub_entry != NULL
14115 && (stub_entry->stub_type == ppc_stub_plt_call
14116 || stub_entry->stub_type == ppc_stub_plt_call_r2save
14117 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
14118 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
14119 {
14120 bfd_boolean can_plt_call = FALSE;
14121
14122 /* All of these stubs will modify r2, so there must be a
14123 branch and link followed by a nop. The nop is
14124 replaced by an insn to restore r2. */
14125 if (rel->r_offset + 8 <= input_section->size)
14126 {
14127 unsigned long br;
14128
14129 br = bfd_get_32 (input_bfd,
14130 contents + rel->r_offset);
14131 if ((br & 1) != 0)
14132 {
14133 unsigned long nop;
14134
14135 nop = bfd_get_32 (input_bfd,
14136 contents + rel->r_offset + 4);
14137 if (nop == NOP
14138 || nop == CROR_151515 || nop == CROR_313131)
14139 {
14140 if (h != NULL
14141 && (h == htab->tls_get_addr_fd
14142 || h == htab->tls_get_addr)
14143 && htab->params->tls_get_addr_opt)
14144 {
14145 /* Special stub used, leave nop alone. */
14146 }
14147 else
14148 bfd_put_32 (input_bfd,
14149 LD_R2_0R1 + STK_TOC (htab),
14150 contents + rel->r_offset + 4);
14151 can_plt_call = TRUE;
14152 }
14153 }
14154 }
14155
14156 if (!can_plt_call && h != NULL)
14157 {
14158 const char *name = h->elf.root.root.string;
14159
14160 if (*name == '.')
14161 ++name;
14162
14163 if (strncmp (name, "__libc_start_main", 17) == 0
14164 && (name[17] == 0 || name[17] == '@'))
14165 {
14166 /* Allow crt1 branch to go via a toc adjusting
14167 stub. Other calls that never return could do
14168 the same, if we could detect such. */
14169 can_plt_call = TRUE;
14170 }
14171 }
14172
14173 if (!can_plt_call)
14174 {
14175 /* g++ as of 20130507 emits self-calls without a
14176 following nop. This is arguably wrong since we
14177 have conflicting information. On the one hand a
14178 global symbol and on the other a local call
14179 sequence, but don't error for this special case.
14180 It isn't possible to cheaply verify we have
14181 exactly such a call. Allow all calls to the same
14182 section. */
14183 asection *code_sec = sec;
14184
14185 if (get_opd_info (sec) != NULL)
14186 {
14187 bfd_vma off = (relocation + addend
14188 - sec->output_section->vma
14189 - sec->output_offset);
14190
14191 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
14192 }
14193 if (code_sec == input_section)
14194 can_plt_call = TRUE;
14195 }
14196
14197 if (!can_plt_call)
14198 {
14199 if (stub_entry->stub_type == ppc_stub_plt_call
14200 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14201 info->callbacks->einfo
14202 /* xgettext:c-format */
14203 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14204 "recompile with -fPIC\n"),
14205 input_bfd, input_section, rel->r_offset, sym_name);
14206 else
14207 info->callbacks->einfo
14208 /* xgettext:c-format */
14209 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
14210 "(-mcmodel=small toc adjust stub)\n"),
14211 input_bfd, input_section, rel->r_offset, sym_name);
14212
14213 bfd_set_error (bfd_error_bad_value);
14214 ret = FALSE;
14215 }
14216
14217 if (can_plt_call
14218 && (stub_entry->stub_type == ppc_stub_plt_call
14219 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
14220 unresolved_reloc = FALSE;
14221 }
14222
14223 if ((stub_entry == NULL
14224 || stub_entry->stub_type == ppc_stub_long_branch
14225 || stub_entry->stub_type == ppc_stub_plt_branch)
14226 && get_opd_info (sec) != NULL)
14227 {
14228 /* The branch destination is the value of the opd entry. */
14229 bfd_vma off = (relocation + addend
14230 - sec->output_section->vma
14231 - sec->output_offset);
14232 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
14233 if (dest != (bfd_vma) -1)
14234 {
14235 relocation = dest;
14236 addend = 0;
14237 reloc_dest = DEST_OPD;
14238 }
14239 }
14240
14241 /* If the branch is out of reach we ought to have a long
14242 branch stub. */
14243 from = (rel->r_offset
14244 + input_section->output_offset
14245 + input_section->output_section->vma);
14246
14247 relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh
14248 ? fdh->elf.other
14249 : sym->st_other);
14250
14251 if (stub_entry != NULL
14252 && (stub_entry->stub_type == ppc_stub_long_branch
14253 || stub_entry->stub_type == ppc_stub_plt_branch)
14254 && (r_type == R_PPC64_ADDR14_BRTAKEN
14255 || r_type == R_PPC64_ADDR14_BRNTAKEN
14256 || (relocation + addend - from + max_br_offset
14257 < 2 * max_br_offset)))
14258 /* Don't use the stub if this branch is in range. */
14259 stub_entry = NULL;
14260
14261 if (stub_entry != NULL)
14262 {
14263 /* Munge up the value and addend so that we call the stub
14264 rather than the procedure directly. */
14265 asection *stub_sec = stub_entry->group->stub_sec;
14266
14267 if (stub_entry->stub_type == ppc_stub_save_res)
14268 relocation += (stub_sec->output_offset
14269 + stub_sec->output_section->vma
14270 + stub_sec->size - htab->sfpr->size
14271 - htab->sfpr->output_offset
14272 - htab->sfpr->output_section->vma);
14273 else
14274 relocation = (stub_entry->stub_offset
14275 + stub_sec->output_offset
14276 + stub_sec->output_section->vma);
14277 addend = 0;
14278 reloc_dest = DEST_STUB;
14279
14280 if ((stub_entry->stub_type == ppc_stub_plt_call
14281 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14282 && (ALWAYS_EMIT_R2SAVE
14283 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
14284 && rel + 1 < relend
14285 && rel[1].r_offset == rel->r_offset + 4
14286 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
14287 relocation += 4;
14288 }
14289
14290 if (insn != 0)
14291 {
14292 if (is_isa_v2)
14293 {
14294 /* Set 'a' bit. This is 0b00010 in BO field for branch
14295 on CR(BI) insns (BO == 001at or 011at), and 0b01000
14296 for branch on CTR insns (BO == 1a00t or 1a01t). */
14297 if ((insn & (0x14 << 21)) == (0x04 << 21))
14298 insn |= 0x02 << 21;
14299 else if ((insn & (0x14 << 21)) == (0x10 << 21))
14300 insn |= 0x08 << 21;
14301 else
14302 break;
14303 }
14304 else
14305 {
14306 /* Invert 'y' bit if not the default. */
14307 if ((bfd_signed_vma) (relocation + addend - from) < 0)
14308 insn ^= 0x01 << 21;
14309 }
14310
14311 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
14312 }
14313
14314 /* NOP out calls to undefined weak functions.
14315 We can thus call a weak function without first
14316 checking whether the function is defined. */
14317 else if (h != NULL
14318 && h->elf.root.type == bfd_link_hash_undefweak
14319 && h->elf.dynindx == -1
14320 && r_type == R_PPC64_REL24
14321 && relocation == 0
14322 && addend == 0)
14323 {
14324 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
14325 goto copy_reloc;
14326 }
14327 break;
14328 }
14329
14330 /* Set `addend'. */
14331 tls_type = 0;
14332 switch (r_type)
14333 {
14334 default:
14335 info->callbacks->einfo
14336 /* xgettext:c-format */
14337 (_("%P: %B: unknown relocation type %d for `%T'\n"),
14338 input_bfd, (int) r_type, sym_name);
14339
14340 bfd_set_error (bfd_error_bad_value);
14341 ret = FALSE;
14342 goto copy_reloc;
14343
14344 case R_PPC64_NONE:
14345 case R_PPC64_TLS:
14346 case R_PPC64_TLSGD:
14347 case R_PPC64_TLSLD:
14348 case R_PPC64_TOCSAVE:
14349 case R_PPC64_GNU_VTINHERIT:
14350 case R_PPC64_GNU_VTENTRY:
14351 case R_PPC64_ENTRY:
14352 goto copy_reloc;
14353
14354 /* GOT16 relocations. Like an ADDR16 using the symbol's
14355 address in the GOT as relocation value instead of the
14356 symbol's value itself. Also, create a GOT entry for the
14357 symbol and put the symbol value there. */
14358 case R_PPC64_GOT_TLSGD16:
14359 case R_PPC64_GOT_TLSGD16_LO:
14360 case R_PPC64_GOT_TLSGD16_HI:
14361 case R_PPC64_GOT_TLSGD16_HA:
14362 tls_type = TLS_TLS | TLS_GD;
14363 goto dogot;
14364
14365 case R_PPC64_GOT_TLSLD16:
14366 case R_PPC64_GOT_TLSLD16_LO:
14367 case R_PPC64_GOT_TLSLD16_HI:
14368 case R_PPC64_GOT_TLSLD16_HA:
14369 tls_type = TLS_TLS | TLS_LD;
14370 goto dogot;
14371
14372 case R_PPC64_GOT_TPREL16_DS:
14373 case R_PPC64_GOT_TPREL16_LO_DS:
14374 case R_PPC64_GOT_TPREL16_HI:
14375 case R_PPC64_GOT_TPREL16_HA:
14376 tls_type = TLS_TLS | TLS_TPREL;
14377 goto dogot;
14378
14379 case R_PPC64_GOT_DTPREL16_DS:
14380 case R_PPC64_GOT_DTPREL16_LO_DS:
14381 case R_PPC64_GOT_DTPREL16_HI:
14382 case R_PPC64_GOT_DTPREL16_HA:
14383 tls_type = TLS_TLS | TLS_DTPREL;
14384 goto dogot;
14385
14386 case R_PPC64_GOT16:
14387 case R_PPC64_GOT16_LO:
14388 case R_PPC64_GOT16_HI:
14389 case R_PPC64_GOT16_HA:
14390 case R_PPC64_GOT16_DS:
14391 case R_PPC64_GOT16_LO_DS:
14392 dogot:
14393 {
14394 /* Relocation is to the entry for this symbol in the global
14395 offset table. */
14396 asection *got;
14397 bfd_vma *offp;
14398 bfd_vma off;
14399 unsigned long indx = 0;
14400 struct got_entry *ent;
14401
14402 if (tls_type == (TLS_TLS | TLS_LD)
14403 && (h == NULL
14404 || !h->elf.def_dynamic))
14405 ent = ppc64_tlsld_got (input_bfd);
14406 else
14407 {
14408
14409 if (h != NULL)
14410 {
14411 bfd_boolean dyn = htab->elf.dynamic_sections_created;
14412 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info),
14413 &h->elf)
14414 || (bfd_link_pic (info)
14415 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
14416 /* This is actually a static link, or it is a
14417 -Bsymbolic link and the symbol is defined
14418 locally, or the symbol was forced to be local
14419 because of a version file. */
14420 ;
14421 else
14422 {
14423 BFD_ASSERT (h->elf.dynindx != -1);
14424 indx = h->elf.dynindx;
14425 unresolved_reloc = FALSE;
14426 }
14427 ent = h->elf.got.glist;
14428 }
14429 else
14430 {
14431 if (local_got_ents == NULL)
14432 abort ();
14433 ent = local_got_ents[r_symndx];
14434 }
14435
14436 for (; ent != NULL; ent = ent->next)
14437 if (ent->addend == orig_rel.r_addend
14438 && ent->owner == input_bfd
14439 && ent->tls_type == tls_type)
14440 break;
14441 }
14442
14443 if (ent == NULL)
14444 abort ();
14445 if (ent->is_indirect)
14446 ent = ent->got.ent;
14447 offp = &ent->got.offset;
14448 got = ppc64_elf_tdata (ent->owner)->got;
14449 if (got == NULL)
14450 abort ();
14451
14452 /* The offset must always be a multiple of 8. We use the
14453 least significant bit to record whether we have already
14454 processed this entry. */
14455 off = *offp;
14456 if ((off & 1) != 0)
14457 off &= ~1;
14458 else
14459 {
14460 /* Generate relocs for the dynamic linker, except in
14461 the case of TLSLD where we'll use one entry per
14462 module. */
14463 asection *relgot;
14464 bfd_boolean ifunc;
14465
14466 *offp = off | 1;
14467 relgot = NULL;
14468 ifunc = (h != NULL
14469 ? h->elf.type == STT_GNU_IFUNC
14470 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
14471 if (ifunc)
14472 relgot = htab->elf.irelplt;
14473 else if ((bfd_link_pic (info) || indx != 0)
14474 && (h == NULL
14475 || (tls_type == (TLS_TLS | TLS_LD)
14476 && !h->elf.def_dynamic)
14477 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
14478 || h->elf.root.type != bfd_link_hash_undefweak))
14479 relgot = ppc64_elf_tdata (ent->owner)->relgot;
14480 if (relgot != NULL)
14481 {
14482 outrel.r_offset = (got->output_section->vma
14483 + got->output_offset
14484 + off);
14485 outrel.r_addend = addend;
14486 if (tls_type & (TLS_LD | TLS_GD))
14487 {
14488 outrel.r_addend = 0;
14489 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
14490 if (tls_type == (TLS_TLS | TLS_GD))
14491 {
14492 loc = relgot->contents;
14493 loc += (relgot->reloc_count++
14494 * sizeof (Elf64_External_Rela));
14495 bfd_elf64_swap_reloca_out (output_bfd,
14496 &outrel, loc);
14497 outrel.r_offset += 8;
14498 outrel.r_addend = addend;
14499 outrel.r_info
14500 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14501 }
14502 }
14503 else if (tls_type == (TLS_TLS | TLS_DTPREL))
14504 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
14505 else if (tls_type == (TLS_TLS | TLS_TPREL))
14506 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
14507 else if (indx != 0)
14508 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
14509 else
14510 {
14511 if (ifunc)
14512 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14513 else
14514 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14515
14516 /* Write the .got section contents for the sake
14517 of prelink. */
14518 loc = got->contents + off;
14519 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
14520 loc);
14521 }
14522
14523 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
14524 {
14525 outrel.r_addend += relocation;
14526 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
14527 {
14528 if (htab->elf.tls_sec == NULL)
14529 outrel.r_addend = 0;
14530 else
14531 outrel.r_addend -= htab->elf.tls_sec->vma;
14532 }
14533 }
14534 loc = relgot->contents;
14535 loc += (relgot->reloc_count++
14536 * sizeof (Elf64_External_Rela));
14537 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14538 }
14539
14540 /* Init the .got section contents here if we're not
14541 emitting a reloc. */
14542 else
14543 {
14544 relocation += addend;
14545 if (tls_type == (TLS_TLS | TLS_LD))
14546 relocation = 1;
14547 else if (tls_type != 0)
14548 {
14549 if (htab->elf.tls_sec == NULL)
14550 relocation = 0;
14551 else
14552 {
14553 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
14554 if (tls_type == (TLS_TLS | TLS_TPREL))
14555 relocation += DTP_OFFSET - TP_OFFSET;
14556 }
14557
14558 if (tls_type == (TLS_TLS | TLS_GD))
14559 {
14560 bfd_put_64 (output_bfd, relocation,
14561 got->contents + off + 8);
14562 relocation = 1;
14563 }
14564 }
14565
14566 bfd_put_64 (output_bfd, relocation,
14567 got->contents + off);
14568 }
14569 }
14570
14571 if (off >= (bfd_vma) -2)
14572 abort ();
14573
14574 relocation = got->output_section->vma + got->output_offset + off;
14575 addend = -(TOCstart + htab->sec_info[input_section->id].toc_off);
14576 }
14577 break;
14578
14579 case R_PPC64_PLT16_HA:
14580 case R_PPC64_PLT16_HI:
14581 case R_PPC64_PLT16_LO:
14582 case R_PPC64_PLT32:
14583 case R_PPC64_PLT64:
14584 /* Relocation is to the entry for this symbol in the
14585 procedure linkage table. */
14586 {
14587 struct plt_entry **plt_list = NULL;
14588 if (h != NULL)
14589 plt_list = &h->elf.plt.plist;
14590 else if (local_got_ents != NULL)
14591 {
14592 struct plt_entry **local_plt = (struct plt_entry **)
14593 (local_got_ents + symtab_hdr->sh_info);
14594 unsigned char *local_got_tls_masks = (unsigned char *)
14595 (local_plt + symtab_hdr->sh_info);
14596 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
14597 plt_list = local_plt + r_symndx;
14598 }
14599 if (plt_list)
14600 {
14601 struct plt_entry *ent;
14602
14603 for (ent = *plt_list; ent != NULL; ent = ent->next)
14604 if (ent->plt.offset != (bfd_vma) -1
14605 && ent->addend == orig_rel.r_addend)
14606 {
14607 asection *plt;
14608
14609 plt = htab->elf.splt;
14610 if (!htab->elf.dynamic_sections_created
14611 || h == NULL
14612 || h->elf.dynindx == -1)
14613 plt = htab->elf.iplt;
14614 relocation = (plt->output_section->vma
14615 + plt->output_offset
14616 + ent->plt.offset);
14617 addend = 0;
14618 unresolved_reloc = FALSE;
14619 break;
14620 }
14621 }
14622 }
14623 break;
14624
14625 case R_PPC64_TOC:
14626 /* Relocation value is TOC base. */
14627 relocation = TOCstart;
14628 if (r_symndx == STN_UNDEF)
14629 relocation += htab->sec_info[input_section->id].toc_off;
14630 else if (unresolved_reloc)
14631 ;
14632 else if (sec != NULL && sec->id < htab->sec_info_arr_size)
14633 relocation += htab->sec_info[sec->id].toc_off;
14634 else
14635 unresolved_reloc = TRUE;
14636 goto dodyn;
14637
14638 /* TOC16 relocs. We want the offset relative to the TOC base,
14639 which is the address of the start of the TOC plus 0x8000.
14640 The TOC consists of sections .got, .toc, .tocbss, and .plt,
14641 in this order. */
14642 case R_PPC64_TOC16:
14643 case R_PPC64_TOC16_LO:
14644 case R_PPC64_TOC16_HI:
14645 case R_PPC64_TOC16_DS:
14646 case R_PPC64_TOC16_LO_DS:
14647 case R_PPC64_TOC16_HA:
14648 addend -= TOCstart + htab->sec_info[input_section->id].toc_off;
14649 break;
14650
14651 /* Relocate against the beginning of the section. */
14652 case R_PPC64_SECTOFF:
14653 case R_PPC64_SECTOFF_LO:
14654 case R_PPC64_SECTOFF_HI:
14655 case R_PPC64_SECTOFF_DS:
14656 case R_PPC64_SECTOFF_LO_DS:
14657 case R_PPC64_SECTOFF_HA:
14658 if (sec != NULL)
14659 addend -= sec->output_section->vma;
14660 break;
14661
14662 case R_PPC64_REL16:
14663 case R_PPC64_REL16_LO:
14664 case R_PPC64_REL16_HI:
14665 case R_PPC64_REL16_HA:
14666 case R_PPC64_REL16DX_HA:
14667 break;
14668
14669 case R_PPC64_REL14:
14670 case R_PPC64_REL14_BRNTAKEN:
14671 case R_PPC64_REL14_BRTAKEN:
14672 case R_PPC64_REL24:
14673 break;
14674
14675 case R_PPC64_TPREL16:
14676 case R_PPC64_TPREL16_LO:
14677 case R_PPC64_TPREL16_HI:
14678 case R_PPC64_TPREL16_HA:
14679 case R_PPC64_TPREL16_DS:
14680 case R_PPC64_TPREL16_LO_DS:
14681 case R_PPC64_TPREL16_HIGH:
14682 case R_PPC64_TPREL16_HIGHA:
14683 case R_PPC64_TPREL16_HIGHER:
14684 case R_PPC64_TPREL16_HIGHERA:
14685 case R_PPC64_TPREL16_HIGHEST:
14686 case R_PPC64_TPREL16_HIGHESTA:
14687 if (h != NULL
14688 && h->elf.root.type == bfd_link_hash_undefweak
14689 && h->elf.dynindx == -1)
14690 {
14691 /* Make this relocation against an undefined weak symbol
14692 resolve to zero. This is really just a tweak, since
14693 code using weak externs ought to check that they are
14694 defined before using them. */
14695 bfd_byte *p = contents + rel->r_offset - d_offset;
14696
14697 insn = bfd_get_32 (input_bfd, p);
14698 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
14699 if (insn != 0)
14700 bfd_put_32 (input_bfd, insn, p);
14701 break;
14702 }
14703 if (htab->elf.tls_sec != NULL)
14704 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14705 if (bfd_link_pic (info))
14706 /* The TPREL16 relocs shouldn't really be used in shared
14707 libs as they will result in DT_TEXTREL being set, but
14708 support them anyway. */
14709 goto dodyn;
14710 break;
14711
14712 case R_PPC64_DTPREL16:
14713 case R_PPC64_DTPREL16_LO:
14714 case R_PPC64_DTPREL16_HI:
14715 case R_PPC64_DTPREL16_HA:
14716 case R_PPC64_DTPREL16_DS:
14717 case R_PPC64_DTPREL16_LO_DS:
14718 case R_PPC64_DTPREL16_HIGH:
14719 case R_PPC64_DTPREL16_HIGHA:
14720 case R_PPC64_DTPREL16_HIGHER:
14721 case R_PPC64_DTPREL16_HIGHERA:
14722 case R_PPC64_DTPREL16_HIGHEST:
14723 case R_PPC64_DTPREL16_HIGHESTA:
14724 if (htab->elf.tls_sec != NULL)
14725 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14726 break;
14727
14728 case R_PPC64_ADDR64_LOCAL:
14729 addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL
14730 ? h->elf.other
14731 : sym->st_other);
14732 break;
14733
14734 case R_PPC64_DTPMOD64:
14735 relocation = 1;
14736 addend = 0;
14737 goto dodyn;
14738
14739 case R_PPC64_TPREL64:
14740 if (htab->elf.tls_sec != NULL)
14741 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
14742 goto dodyn;
14743
14744 case R_PPC64_DTPREL64:
14745 if (htab->elf.tls_sec != NULL)
14746 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
14747 /* Fall through. */
14748
14749 /* Relocations that may need to be propagated if this is a
14750 dynamic object. */
14751 case R_PPC64_REL30:
14752 case R_PPC64_REL32:
14753 case R_PPC64_REL64:
14754 case R_PPC64_ADDR14:
14755 case R_PPC64_ADDR14_BRNTAKEN:
14756 case R_PPC64_ADDR14_BRTAKEN:
14757 case R_PPC64_ADDR16:
14758 case R_PPC64_ADDR16_DS:
14759 case R_PPC64_ADDR16_HA:
14760 case R_PPC64_ADDR16_HI:
14761 case R_PPC64_ADDR16_HIGH:
14762 case R_PPC64_ADDR16_HIGHA:
14763 case R_PPC64_ADDR16_HIGHER:
14764 case R_PPC64_ADDR16_HIGHERA:
14765 case R_PPC64_ADDR16_HIGHEST:
14766 case R_PPC64_ADDR16_HIGHESTA:
14767 case R_PPC64_ADDR16_LO:
14768 case R_PPC64_ADDR16_LO_DS:
14769 case R_PPC64_ADDR24:
14770 case R_PPC64_ADDR32:
14771 case R_PPC64_ADDR64:
14772 case R_PPC64_UADDR16:
14773 case R_PPC64_UADDR32:
14774 case R_PPC64_UADDR64:
14775 dodyn:
14776 if ((input_section->flags & SEC_ALLOC) == 0)
14777 break;
14778
14779 if (NO_OPD_RELOCS && is_opd)
14780 break;
14781
14782 if (bfd_link_pic (info)
14783 ? ((h != NULL && pc_dynrelocs (h))
14784 || must_be_dyn_reloc (info, r_type))
14785 : (h != NULL
14786 ? h->dyn_relocs != NULL
14787 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14788 {
14789 bfd_boolean skip, relocate;
14790 asection *sreloc;
14791 bfd_vma out_off;
14792
14793 /* When generating a dynamic object, these relocations
14794 are copied into the output file to be resolved at run
14795 time. */
14796
14797 skip = FALSE;
14798 relocate = FALSE;
14799
14800 out_off = _bfd_elf_section_offset (output_bfd, info,
14801 input_section, rel->r_offset);
14802 if (out_off == (bfd_vma) -1)
14803 skip = TRUE;
14804 else if (out_off == (bfd_vma) -2)
14805 skip = TRUE, relocate = TRUE;
14806 out_off += (input_section->output_section->vma
14807 + input_section->output_offset);
14808 outrel.r_offset = out_off;
14809 outrel.r_addend = rel->r_addend;
14810
14811 /* Optimize unaligned reloc use. */
14812 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
14813 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
14814 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
14815 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
14816 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
14817 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
14818 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
14819 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
14820 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
14821
14822 if (skip)
14823 memset (&outrel, 0, sizeof outrel);
14824 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
14825 && !is_opd
14826 && r_type != R_PPC64_TOC)
14827 {
14828 BFD_ASSERT (h->elf.dynindx != -1);
14829 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
14830 }
14831 else
14832 {
14833 /* This symbol is local, or marked to become local,
14834 or this is an opd section reloc which must point
14835 at a local function. */
14836 outrel.r_addend += relocation;
14837 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
14838 {
14839 if (is_opd && h != NULL)
14840 {
14841 /* Lie about opd entries. This case occurs
14842 when building shared libraries and we
14843 reference a function in another shared
14844 lib. The same thing happens for a weak
14845 definition in an application that's
14846 overridden by a strong definition in a
14847 shared lib. (I believe this is a generic
14848 bug in binutils handling of weak syms.)
14849 In these cases we won't use the opd
14850 entry in this lib. */
14851 unresolved_reloc = FALSE;
14852 }
14853 if (!is_opd
14854 && r_type == R_PPC64_ADDR64
14855 && (h != NULL
14856 ? h->elf.type == STT_GNU_IFUNC
14857 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
14858 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
14859 else
14860 {
14861 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
14862
14863 /* We need to relocate .opd contents for ld.so.
14864 Prelink also wants simple and consistent rules
14865 for relocs. This make all RELATIVE relocs have
14866 *r_offset equal to r_addend. */
14867 relocate = TRUE;
14868 }
14869 }
14870 else
14871 {
14872 long indx = 0;
14873
14874 if (h != NULL
14875 ? h->elf.type == STT_GNU_IFUNC
14876 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14877 {
14878 info->callbacks->einfo
14879 /* xgettext:c-format */
14880 (_("%P: %H: %s for indirect "
14881 "function `%T' unsupported\n"),
14882 input_bfd, input_section, rel->r_offset,
14883 ppc64_elf_howto_table[r_type]->name,
14884 sym_name);
14885 ret = FALSE;
14886 }
14887 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
14888 ;
14889 else if (sec == NULL || sec->owner == NULL)
14890 {
14891 bfd_set_error (bfd_error_bad_value);
14892 return FALSE;
14893 }
14894 else
14895 {
14896 asection *osec;
14897
14898 osec = sec->output_section;
14899 indx = elf_section_data (osec)->dynindx;
14900
14901 if (indx == 0)
14902 {
14903 if ((osec->flags & SEC_READONLY) == 0
14904 && htab->elf.data_index_section != NULL)
14905 osec = htab->elf.data_index_section;
14906 else
14907 osec = htab->elf.text_index_section;
14908 indx = elf_section_data (osec)->dynindx;
14909 }
14910 BFD_ASSERT (indx != 0);
14911
14912 /* We are turning this relocation into one
14913 against a section symbol, so subtract out
14914 the output section's address but not the
14915 offset of the input section in the output
14916 section. */
14917 outrel.r_addend -= osec->vma;
14918 }
14919
14920 outrel.r_info = ELF64_R_INFO (indx, r_type);
14921 }
14922 }
14923
14924 sreloc = elf_section_data (input_section)->sreloc;
14925 if (h != NULL
14926 ? h->elf.type == STT_GNU_IFUNC
14927 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
14928 sreloc = htab->elf.irelplt;
14929 if (sreloc == NULL)
14930 abort ();
14931
14932 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
14933 >= sreloc->size)
14934 abort ();
14935 loc = sreloc->contents;
14936 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
14937 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
14938
14939 /* If this reloc is against an external symbol, it will
14940 be computed at runtime, so there's no need to do
14941 anything now. However, for the sake of prelink ensure
14942 that the section contents are a known value. */
14943 if (! relocate)
14944 {
14945 unresolved_reloc = FALSE;
14946 /* The value chosen here is quite arbitrary as ld.so
14947 ignores section contents except for the special
14948 case of .opd where the contents might be accessed
14949 before relocation. Choose zero, as that won't
14950 cause reloc overflow. */
14951 relocation = 0;
14952 addend = 0;
14953 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
14954 to improve backward compatibility with older
14955 versions of ld. */
14956 if (r_type == R_PPC64_ADDR64)
14957 addend = outrel.r_addend;
14958 /* Adjust pc_relative relocs to have zero in *r_offset. */
14959 else if (ppc64_elf_howto_table[r_type]->pc_relative)
14960 addend = (input_section->output_section->vma
14961 + input_section->output_offset
14962 + rel->r_offset);
14963 }
14964 }
14965 break;
14966
14967 case R_PPC64_COPY:
14968 case R_PPC64_GLOB_DAT:
14969 case R_PPC64_JMP_SLOT:
14970 case R_PPC64_JMP_IREL:
14971 case R_PPC64_RELATIVE:
14972 /* We shouldn't ever see these dynamic relocs in relocatable
14973 files. */
14974 /* Fall through. */
14975
14976 case R_PPC64_PLTGOT16:
14977 case R_PPC64_PLTGOT16_DS:
14978 case R_PPC64_PLTGOT16_HA:
14979 case R_PPC64_PLTGOT16_HI:
14980 case R_PPC64_PLTGOT16_LO:
14981 case R_PPC64_PLTGOT16_LO_DS:
14982 case R_PPC64_PLTREL32:
14983 case R_PPC64_PLTREL64:
14984 /* These ones haven't been implemented yet. */
14985
14986 info->callbacks->einfo
14987 /* xgettext:c-format */
14988 (_("%P: %B: %s is not supported for `%T'\n"),
14989 input_bfd,
14990 ppc64_elf_howto_table[r_type]->name, sym_name);
14991
14992 bfd_set_error (bfd_error_invalid_operation);
14993 ret = FALSE;
14994 goto copy_reloc;
14995 }
14996
14997 /* Multi-instruction sequences that access the TOC can be
14998 optimized, eg. addis ra,r2,0; addi rb,ra,x;
14999 to nop; addi rb,r2,x; */
15000 switch (r_type)
15001 {
15002 default:
15003 break;
15004
15005 case R_PPC64_GOT_TLSLD16_HI:
15006 case R_PPC64_GOT_TLSGD16_HI:
15007 case R_PPC64_GOT_TPREL16_HI:
15008 case R_PPC64_GOT_DTPREL16_HI:
15009 case R_PPC64_GOT16_HI:
15010 case R_PPC64_TOC16_HI:
15011 /* These relocs would only be useful if building up an
15012 offset to later add to r2, perhaps in an indexed
15013 addressing mode instruction. Don't try to optimize.
15014 Unfortunately, the possibility of someone building up an
15015 offset like this or even with the HA relocs, means that
15016 we need to check the high insn when optimizing the low
15017 insn. */
15018 break;
15019
15020 case R_PPC64_GOT_TLSLD16_HA:
15021 case R_PPC64_GOT_TLSGD16_HA:
15022 case R_PPC64_GOT_TPREL16_HA:
15023 case R_PPC64_GOT_DTPREL16_HA:
15024 case R_PPC64_GOT16_HA:
15025 case R_PPC64_TOC16_HA:
15026 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15027 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15028 {
15029 bfd_byte *p = contents + (rel->r_offset & ~3);
15030 bfd_put_32 (input_bfd, NOP, p);
15031 }
15032 break;
15033
15034 case R_PPC64_GOT_TLSLD16_LO:
15035 case R_PPC64_GOT_TLSGD16_LO:
15036 case R_PPC64_GOT_TPREL16_LO_DS:
15037 case R_PPC64_GOT_DTPREL16_LO_DS:
15038 case R_PPC64_GOT16_LO:
15039 case R_PPC64_GOT16_LO_DS:
15040 case R_PPC64_TOC16_LO:
15041 case R_PPC64_TOC16_LO_DS:
15042 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
15043 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
15044 {
15045 bfd_byte *p = contents + (rel->r_offset & ~3);
15046 insn = bfd_get_32 (input_bfd, p);
15047 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
15048 {
15049 /* Transform addic to addi when we change reg. */
15050 insn &= ~((0x3f << 26) | (0x1f << 16));
15051 insn |= (14u << 26) | (2 << 16);
15052 }
15053 else
15054 {
15055 insn &= ~(0x1f << 16);
15056 insn |= 2 << 16;
15057 }
15058 bfd_put_32 (input_bfd, insn, p);
15059 }
15060 break;
15061 }
15062
15063 /* Do any further special processing. */
15064 howto = ppc64_elf_howto_table[(int) r_type];
15065 switch (r_type)
15066 {
15067 default:
15068 break;
15069
15070 case R_PPC64_REL16_HA:
15071 case R_PPC64_REL16DX_HA:
15072 case R_PPC64_ADDR16_HA:
15073 case R_PPC64_ADDR16_HIGHA:
15074 case R_PPC64_ADDR16_HIGHERA:
15075 case R_PPC64_ADDR16_HIGHESTA:
15076 case R_PPC64_TOC16_HA:
15077 case R_PPC64_SECTOFF_HA:
15078 case R_PPC64_TPREL16_HA:
15079 case R_PPC64_TPREL16_HIGHA:
15080 case R_PPC64_TPREL16_HIGHERA:
15081 case R_PPC64_TPREL16_HIGHESTA:
15082 case R_PPC64_DTPREL16_HA:
15083 case R_PPC64_DTPREL16_HIGHA:
15084 case R_PPC64_DTPREL16_HIGHERA:
15085 case R_PPC64_DTPREL16_HIGHESTA:
15086 /* It's just possible that this symbol is a weak symbol
15087 that's not actually defined anywhere. In that case,
15088 'sec' would be NULL, and we should leave the symbol
15089 alone (it will be set to zero elsewhere in the link). */
15090 if (sec == NULL)
15091 break;
15092 /* Fall through. */
15093
15094 case R_PPC64_GOT16_HA:
15095 case R_PPC64_PLTGOT16_HA:
15096 case R_PPC64_PLT16_HA:
15097 case R_PPC64_GOT_TLSGD16_HA:
15098 case R_PPC64_GOT_TLSLD16_HA:
15099 case R_PPC64_GOT_TPREL16_HA:
15100 case R_PPC64_GOT_DTPREL16_HA:
15101 /* Add 0x10000 if sign bit in 0:15 is set.
15102 Bits 0:15 are not used. */
15103 addend += 0x8000;
15104 break;
15105
15106 case R_PPC64_ADDR16_DS:
15107 case R_PPC64_ADDR16_LO_DS:
15108 case R_PPC64_GOT16_DS:
15109 case R_PPC64_GOT16_LO_DS:
15110 case R_PPC64_PLT16_LO_DS:
15111 case R_PPC64_SECTOFF_DS:
15112 case R_PPC64_SECTOFF_LO_DS:
15113 case R_PPC64_TOC16_DS:
15114 case R_PPC64_TOC16_LO_DS:
15115 case R_PPC64_PLTGOT16_DS:
15116 case R_PPC64_PLTGOT16_LO_DS:
15117 case R_PPC64_GOT_TPREL16_DS:
15118 case R_PPC64_GOT_TPREL16_LO_DS:
15119 case R_PPC64_GOT_DTPREL16_DS:
15120 case R_PPC64_GOT_DTPREL16_LO_DS:
15121 case R_PPC64_TPREL16_DS:
15122 case R_PPC64_TPREL16_LO_DS:
15123 case R_PPC64_DTPREL16_DS:
15124 case R_PPC64_DTPREL16_LO_DS:
15125 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15126 mask = 3;
15127 /* If this reloc is against an lq, lxv, or stxv insn, then
15128 the value must be a multiple of 16. This is somewhat of
15129 a hack, but the "correct" way to do this by defining _DQ
15130 forms of all the _DS relocs bloats all reloc switches in
15131 this file. It doesn't make much sense to use these
15132 relocs in data, so testing the insn should be safe. */
15133 if ((insn & (0x3f << 26)) == (56u << 26)
15134 || ((insn & (0x3f << 26)) == (61u << 26) && (insn & 3) == 1))
15135 mask = 15;
15136 relocation += addend;
15137 addend = insn & (mask ^ 3);
15138 if ((relocation & mask) != 0)
15139 {
15140 relocation ^= relocation & mask;
15141 info->callbacks->einfo
15142 /* xgettext:c-format */
15143 (_("%P: %H: error: %s not a multiple of %u\n"),
15144 input_bfd, input_section, rel->r_offset,
15145 howto->name,
15146 mask + 1);
15147 bfd_set_error (bfd_error_bad_value);
15148 ret = FALSE;
15149 goto copy_reloc;
15150 }
15151 break;
15152 }
15153
15154 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
15155 because such sections are not SEC_ALLOC and thus ld.so will
15156 not process them. */
15157 if (unresolved_reloc
15158 && !((input_section->flags & SEC_DEBUGGING) != 0
15159 && h->elf.def_dynamic)
15160 && _bfd_elf_section_offset (output_bfd, info, input_section,
15161 rel->r_offset) != (bfd_vma) -1)
15162 {
15163 info->callbacks->einfo
15164 /* xgettext:c-format */
15165 (_("%P: %H: unresolvable %s against `%T'\n"),
15166 input_bfd, input_section, rel->r_offset,
15167 howto->name,
15168 h->elf.root.root.string);
15169 ret = FALSE;
15170 }
15171
15172 /* 16-bit fields in insns mostly have signed values, but a
15173 few insns have 16-bit unsigned values. Really, we should
15174 have different reloc types. */
15175 if (howto->complain_on_overflow != complain_overflow_dont
15176 && howto->dst_mask == 0xffff
15177 && (input_section->flags & SEC_CODE) != 0)
15178 {
15179 enum complain_overflow complain = complain_overflow_signed;
15180
15181 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
15182 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
15183 complain = complain_overflow_bitfield;
15184 else if (howto->rightshift == 0
15185 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
15186 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
15187 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
15188 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
15189 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
15190 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
15191 complain = complain_overflow_unsigned;
15192 if (howto->complain_on_overflow != complain)
15193 {
15194 alt_howto = *howto;
15195 alt_howto.complain_on_overflow = complain;
15196 howto = &alt_howto;
15197 }
15198 }
15199
15200 if (r_type == R_PPC64_REL16DX_HA)
15201 {
15202 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
15203 if (rel->r_offset + 4 > input_section->size)
15204 r = bfd_reloc_outofrange;
15205 else
15206 {
15207 relocation += addend;
15208 relocation -= (rel->r_offset
15209 + input_section->output_offset
15210 + input_section->output_section->vma);
15211 relocation = (bfd_signed_vma) relocation >> 16;
15212 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
15213 insn &= ~0x1fffc1;
15214 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
15215 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
15216 r = bfd_reloc_ok;
15217 if (relocation + 0x8000 > 0xffff)
15218 r = bfd_reloc_overflow;
15219 }
15220 }
15221 else
15222 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
15223 rel->r_offset, relocation, addend);
15224
15225 if (r != bfd_reloc_ok)
15226 {
15227 char *more_info = NULL;
15228 const char *reloc_name = howto->name;
15229
15230 if (reloc_dest != DEST_NORMAL)
15231 {
15232 more_info = bfd_malloc (strlen (reloc_name) + 8);
15233 if (more_info != NULL)
15234 {
15235 strcpy (more_info, reloc_name);
15236 strcat (more_info, (reloc_dest == DEST_OPD
15237 ? " (OPD)" : " (stub)"));
15238 reloc_name = more_info;
15239 }
15240 }
15241
15242 if (r == bfd_reloc_overflow)
15243 {
15244 /* On code like "if (foo) foo();" don't report overflow
15245 on a branch to zero when foo is undefined. */
15246 if (!warned
15247 && (reloc_dest == DEST_STUB
15248 || !(h != NULL
15249 && (h->elf.root.type == bfd_link_hash_undefweak
15250 || h->elf.root.type == bfd_link_hash_undefined)
15251 && is_branch_reloc (r_type))))
15252 info->callbacks->reloc_overflow (info, &h->elf.root,
15253 sym_name, reloc_name,
15254 orig_rel.r_addend,
15255 input_bfd, input_section,
15256 rel->r_offset);
15257 }
15258 else
15259 {
15260 info->callbacks->einfo
15261 /* xgettext:c-format */
15262 (_("%P: %H: %s against `%T': error %d\n"),
15263 input_bfd, input_section, rel->r_offset,
15264 reloc_name, sym_name, (int) r);
15265 ret = FALSE;
15266 }
15267 if (more_info != NULL)
15268 free (more_info);
15269 }
15270 copy_reloc:
15271 if (wrel != rel)
15272 *wrel = *rel;
15273 }
15274
15275 if (wrel != rel)
15276 {
15277 Elf_Internal_Shdr *rel_hdr;
15278 size_t deleted = rel - wrel;
15279
15280 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
15281 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15282 if (rel_hdr->sh_size == 0)
15283 {
15284 /* It is too late to remove an empty reloc section. Leave
15285 one NONE reloc.
15286 ??? What is wrong with an empty section??? */
15287 rel_hdr->sh_size = rel_hdr->sh_entsize;
15288 deleted -= 1;
15289 }
15290 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
15291 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
15292 input_section->reloc_count -= deleted;
15293 }
15294
15295 /* If we're emitting relocations, then shortly after this function
15296 returns, reloc offsets and addends for this section will be
15297 adjusted. Worse, reloc symbol indices will be for the output
15298 file rather than the input. Save a copy of the relocs for
15299 opd_entry_value. */
15300 if (is_opd && (info->emitrelocations || bfd_link_relocatable (info)))
15301 {
15302 bfd_size_type amt;
15303 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
15304 rel = bfd_alloc (input_bfd, amt);
15305 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
15306 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
15307 if (rel == NULL)
15308 return FALSE;
15309 memcpy (rel, relocs, amt);
15310 }
15311 return ret;
15312}
15313
15314/* Adjust the value of any local symbols in opd sections. */
15315
15316static int
15317ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
15318 const char *name ATTRIBUTE_UNUSED,
15319 Elf_Internal_Sym *elfsym,
15320 asection *input_sec,
15321 struct elf_link_hash_entry *h)
15322{
15323 struct _opd_sec_data *opd;
15324 long adjust;
15325 bfd_vma value;
15326
15327 if (h != NULL)
15328 return 1;
15329
15330 opd = get_opd_info (input_sec);
15331 if (opd == NULL || opd->adjust == NULL)
15332 return 1;
15333
15334 value = elfsym->st_value - input_sec->output_offset;
15335 if (!bfd_link_relocatable (info))
15336 value -= input_sec->output_section->vma;
15337
15338 adjust = opd->adjust[OPD_NDX (value)];
15339 if (adjust == -1)
15340 return 2;
15341
15342 elfsym->st_value += adjust;
15343 return 1;
15344}
15345
15346/* Finish up dynamic symbol handling. We set the contents of various
15347 dynamic sections here. */
15348
15349static bfd_boolean
15350ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
15351 struct bfd_link_info *info,
15352 struct elf_link_hash_entry *h,
15353 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
15354{
15355 struct ppc_link_hash_table *htab;
15356 struct plt_entry *ent;
15357 Elf_Internal_Rela rela;
15358 bfd_byte *loc;
15359
15360 htab = ppc_hash_table (info);
15361 if (htab == NULL)
15362 return FALSE;
15363
15364 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
15365 if (ent->plt.offset != (bfd_vma) -1)
15366 {
15367 /* This symbol has an entry in the procedure linkage
15368 table. Set it up. */
15369 if (!htab->elf.dynamic_sections_created
15370 || h->dynindx == -1)
15371 {
15372 BFD_ASSERT (h->type == STT_GNU_IFUNC
15373 && h->def_regular
15374 && (h->root.type == bfd_link_hash_defined
15375 || h->root.type == bfd_link_hash_defweak));
15376 rela.r_offset = (htab->elf.iplt->output_section->vma
15377 + htab->elf.iplt->output_offset
15378 + ent->plt.offset);
15379 if (htab->opd_abi)
15380 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
15381 else
15382 rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
15383 rela.r_addend = (h->root.u.def.value
15384 + h->root.u.def.section->output_offset
15385 + h->root.u.def.section->output_section->vma
15386 + ent->addend);
15387 loc = (htab->elf.irelplt->contents
15388 + (htab->elf.irelplt->reloc_count++
15389 * sizeof (Elf64_External_Rela)));
15390 }
15391 else
15392 {
15393 rela.r_offset = (htab->elf.splt->output_section->vma
15394 + htab->elf.splt->output_offset
15395 + ent->plt.offset);
15396 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
15397 rela.r_addend = ent->addend;
15398 loc = (htab->elf.srelplt->contents
15399 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab))
15400 / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela)));
15401 }
15402 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15403
15404 if (!htab->opd_abi)
15405 {
15406 if (!h->def_regular)
15407 {
15408 /* Mark the symbol as undefined, rather than as
15409 defined in glink. Leave the value if there were
15410 any relocations where pointer equality matters
15411 (this is a clue for the dynamic linker, to make
15412 function pointer comparisons work between an
15413 application and shared library), otherwise set it
15414 to zero. */
15415 sym->st_shndx = SHN_UNDEF;
15416 if (!h->pointer_equality_needed)
15417 sym->st_value = 0;
15418 else if (!h->ref_regular_nonweak)
15419 {
15420 /* This breaks function pointer comparisons, but
15421 that is better than breaking tests for a NULL
15422 function pointer. */
15423 sym->st_value = 0;
15424 }
15425 }
15426 }
15427 }
15428
15429 if (h->needs_copy)
15430 {
15431 /* This symbol needs a copy reloc. Set it up. */
15432 asection *srel;
15433
15434 if (h->dynindx == -1
15435 || (h->root.type != bfd_link_hash_defined
15436 && h->root.type != bfd_link_hash_defweak)
15437 || htab->elf.srelbss == NULL
15438 || htab->elf.sreldynrelro == NULL)
15439 abort ();
15440
15441 rela.r_offset = (h->root.u.def.value
15442 + h->root.u.def.section->output_section->vma
15443 + h->root.u.def.section->output_offset);
15444 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
15445 rela.r_addend = 0;
15446 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
15447 srel = htab->elf.sreldynrelro;
15448 else
15449 srel = htab->elf.srelbss;
15450 loc = srel->contents;
15451 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
15452 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
15453 }
15454
15455 return TRUE;
15456}
15457
15458/* Used to decide how to sort relocs in an optimal manner for the
15459 dynamic linker, before writing them out. */
15460
15461static enum elf_reloc_type_class
15462ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
15463 const asection *rel_sec,
15464 const Elf_Internal_Rela *rela)
15465{
15466 enum elf_ppc64_reloc_type r_type;
15467 struct ppc_link_hash_table *htab = ppc_hash_table (info);
15468
15469 if (rel_sec == htab->elf.irelplt)
15470 return reloc_class_ifunc;
15471
15472 r_type = ELF64_R_TYPE (rela->r_info);
15473 switch (r_type)
15474 {
15475 case R_PPC64_RELATIVE:
15476 return reloc_class_relative;
15477 case R_PPC64_JMP_SLOT:
15478 return reloc_class_plt;
15479 case R_PPC64_COPY:
15480 return reloc_class_copy;
15481 default:
15482 return reloc_class_normal;
15483 }
15484}
15485
15486/* Finish up the dynamic sections. */
15487
15488static bfd_boolean
15489ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
15490 struct bfd_link_info *info)
15491{
15492 struct ppc_link_hash_table *htab;
15493 bfd *dynobj;
15494 asection *sdyn;
15495
15496 htab = ppc_hash_table (info);
15497 if (htab == NULL)
15498 return FALSE;
15499
15500 dynobj = htab->elf.dynobj;
15501 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
15502
15503 if (htab->elf.dynamic_sections_created)
15504 {
15505 Elf64_External_Dyn *dyncon, *dynconend;
15506
15507 if (sdyn == NULL || htab->elf.sgot == NULL)
15508 abort ();
15509
15510 dyncon = (Elf64_External_Dyn *) sdyn->contents;
15511 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
15512 for (; dyncon < dynconend; dyncon++)
15513 {
15514 Elf_Internal_Dyn dyn;
15515 asection *s;
15516
15517 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
15518
15519 switch (dyn.d_tag)
15520 {
15521 default:
15522 continue;
15523
15524 case DT_PPC64_GLINK:
15525 s = htab->glink;
15526 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15527 /* We stupidly defined DT_PPC64_GLINK to be the start
15528 of glink rather than the first entry point, which is
15529 what ld.so needs, and now have a bigger stub to
15530 support automatic multiple TOCs. */
15531 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 8 * 4;
15532 break;
15533
15534 case DT_PPC64_OPD:
15535 s = bfd_get_section_by_name (output_bfd, ".opd");
15536 if (s == NULL)
15537 continue;
15538 dyn.d_un.d_ptr = s->vma;
15539 break;
15540
15541 case DT_PPC64_OPT:
15542 if (htab->do_multi_toc && htab->multi_toc_needed)
15543 dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC;
15544 break;
15545
15546 case DT_PPC64_OPDSZ:
15547 s = bfd_get_section_by_name (output_bfd, ".opd");
15548 if (s == NULL)
15549 continue;
15550 dyn.d_un.d_val = s->size;
15551 break;
15552
15553 case DT_PLTGOT:
15554 s = htab->elf.splt;
15555 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15556 break;
15557
15558 case DT_JMPREL:
15559 s = htab->elf.srelplt;
15560 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
15561 break;
15562
15563 case DT_PLTRELSZ:
15564 dyn.d_un.d_val = htab->elf.srelplt->size;
15565 break;
15566 }
15567
15568 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
15569 }
15570 }
15571
15572 if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0)
15573 {
15574 /* Fill in the first entry in the global offset table.
15575 We use it to hold the link-time TOCbase. */
15576 bfd_put_64 (output_bfd,
15577 elf_gp (output_bfd) + TOC_BASE_OFF,
15578 htab->elf.sgot->contents);
15579
15580 /* Set .got entry size. */
15581 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 8;
15582 }
15583
15584 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
15585 {
15586 /* Set .plt entry size. */
15587 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
15588 = PLT_ENTRY_SIZE (htab);
15589 }
15590
15591 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
15592 brlt ourselves if emitrelocations. */
15593 if (htab->brlt != NULL
15594 && htab->brlt->reloc_count != 0
15595 && !_bfd_elf_link_output_relocs (output_bfd,
15596 htab->brlt,
15597 elf_section_data (htab->brlt)->rela.hdr,
15598 elf_section_data (htab->brlt)->relocs,
15599 NULL))
15600 return FALSE;
15601
15602 if (htab->glink != NULL
15603 && htab->glink->reloc_count != 0
15604 && !_bfd_elf_link_output_relocs (output_bfd,
15605 htab->glink,
15606 elf_section_data (htab->glink)->rela.hdr,
15607 elf_section_data (htab->glink)->relocs,
15608 NULL))
15609 return FALSE;
15610
15611 if (htab->glink_eh_frame != NULL
15612 && htab->glink_eh_frame->size != 0)
15613 {
15614 bfd_vma val;
15615 bfd_byte *p;
15616 asection *stub_sec;
15617
15618 p = htab->glink_eh_frame->contents + sizeof (glink_eh_frame_cie);
15619 for (stub_sec = htab->params->stub_bfd->sections;
15620 stub_sec != NULL;
15621 stub_sec = stub_sec->next)
15622 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
15623 {
15624 /* FDE length. */
15625 p += 4;
15626 /* CIE pointer. */
15627 p += 4;
15628 /* Offset to stub section. */
15629 val = (stub_sec->output_section->vma
15630 + stub_sec->output_offset);
15631 val -= (htab->glink_eh_frame->output_section->vma
15632 + htab->glink_eh_frame->output_offset
15633 + (p - htab->glink_eh_frame->contents));
15634 if (val + 0x80000000 > 0xffffffff)
15635 {
15636 info->callbacks->einfo
15637 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15638 stub_sec->name);
15639 return FALSE;
15640 }
15641 bfd_put_32 (dynobj, val, p);
15642 p += 4;
15643 /* stub section size. */
15644 p += 4;
15645 /* Augmentation. */
15646 p += 1;
15647 /* Pad. */
15648 p += 7;
15649 }
15650 if (htab->glink != NULL && htab->glink->size != 0)
15651 {
15652 /* FDE length. */
15653 p += 4;
15654 /* CIE pointer. */
15655 p += 4;
15656 /* Offset to .glink. */
15657 val = (htab->glink->output_section->vma
15658 + htab->glink->output_offset
15659 + 8);
15660 val -= (htab->glink_eh_frame->output_section->vma
15661 + htab->glink_eh_frame->output_offset
15662 + (p - htab->glink_eh_frame->contents));
15663 if (val + 0x80000000 > 0xffffffff)
15664 {
15665 info->callbacks->einfo
15666 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
15667 htab->glink->name);
15668 return FALSE;
15669 }
15670 bfd_put_32 (dynobj, val, p);
15671 p += 4;
15672 /* .glink size. */
15673 p += 4;
15674 /* Augmentation. */
15675 p += 1;
15676 /* Ops. */
15677 p += 7;
15678 }
15679
15680 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
15681 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
15682 htab->glink_eh_frame,
15683 htab->glink_eh_frame->contents))
15684 return FALSE;
15685 }
15686
15687 /* We need to handle writing out multiple GOT sections ourselves,
15688 since we didn't add them to DYNOBJ. We know dynobj is the first
15689 bfd. */
15690 while ((dynobj = dynobj->link.next) != NULL)
15691 {
15692 asection *s;
15693
15694 if (!is_ppc64_elf (dynobj))
15695 continue;
15696
15697 s = ppc64_elf_tdata (dynobj)->got;
15698 if (s != NULL
15699 && s->size != 0
15700 && s->output_section != bfd_abs_section_ptr
15701 && !bfd_set_section_contents (output_bfd, s->output_section,
15702 s->contents, s->output_offset,
15703 s->size))
15704 return FALSE;
15705 s = ppc64_elf_tdata (dynobj)->relgot;
15706 if (s != NULL
15707 && s->size != 0
15708 && s->output_section != bfd_abs_section_ptr
15709 && !bfd_set_section_contents (output_bfd, s->output_section,
15710 s->contents, s->output_offset,
15711 s->size))
15712 return FALSE;
15713 }
15714
15715 return TRUE;
15716}
15717
15718#include "elf64-target.h"
15719
15720/* FreeBSD support */
15721
15722#undef TARGET_LITTLE_SYM
15723#undef TARGET_LITTLE_NAME
15724
15725#undef TARGET_BIG_SYM
15726#define TARGET_BIG_SYM powerpc_elf64_fbsd_vec
15727#undef TARGET_BIG_NAME
15728#define TARGET_BIG_NAME "elf64-powerpc-freebsd"
15729
15730#undef ELF_OSABI
15731#define ELF_OSABI ELFOSABI_FREEBSD
15732
15733#undef elf64_bed
15734#define elf64_bed elf64_powerpc_fbsd_bed
15735
15736#include "elf64-target.h"
15737
GDB Binutils - Deliverables
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