* section.c (struct sec): Remove kept_section.
[deliverable/binutils-gdb.git] / bfd / elf32-mips.c
1 /* MIPS-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4
5 Most of the information added by Ian Lance Taylor, Cygnus Support,
6 <ian@cygnus.com>.
7 N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC.
8 <mark@codesourcery.com>
9 Traditional MIPS targets support added by Koundinya.K, Dansk Data
10 Elektronik & Operations Research Group. <kk@ddeorg.soft.net>
11
12 This file is part of BFD, the Binary File Descriptor library.
13
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 2 of the License, or
17 (at your option) any later version.
18
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
23
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27
28 /* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly
29 different MIPS ELF from other targets. This matters when linking.
30 This file supports both, switching at runtime. */
31
32 #include "bfd.h"
33 #include "sysdep.h"
34 #include "libbfd.h"
35 #include "bfdlink.h"
36 #include "genlink.h"
37 #include "elf-bfd.h"
38 #include "elf/mips.h"
39
40 /* Get the ECOFF swapping routines. */
41 #include "coff/sym.h"
42 #include "coff/symconst.h"
43 #include "coff/internal.h"
44 #include "coff/ecoff.h"
45 #include "coff/mips.h"
46 #define ECOFF_SIGNED_32
47 #include "ecoffswap.h"
48
49 /* This structure is used to hold .got information when linking. It
50 is stored in the tdata field of the bfd_elf_section_data structure. */
51
52 struct mips_got_info
53 {
54 /* The global symbol in the GOT with the lowest index in the dynamic
55 symbol table. */
56 struct elf_link_hash_entry *global_gotsym;
57 /* The number of global .got entries. */
58 unsigned int global_gotno;
59 /* The number of local .got entries. */
60 unsigned int local_gotno;
61 /* The number of local .got entries we have used. */
62 unsigned int assigned_gotno;
63 };
64
65 /* The MIPS ELF linker needs additional information for each symbol in
66 the global hash table. */
67
68 struct mips_elf_link_hash_entry
69 {
70 struct elf_link_hash_entry root;
71
72 /* External symbol information. */
73 EXTR esym;
74
75 /* Number of R_MIPS_32, R_MIPS_REL32, or R_MIPS_64 relocs against
76 this symbol. */
77 unsigned int possibly_dynamic_relocs;
78
79 /* If the R_MIPS_32, R_MIPS_REL32, or R_MIPS_64 reloc is against
80 a readonly section. */
81 boolean readonly_reloc;
82
83 /* The index of the first dynamic relocation (in the .rel.dyn
84 section) against this symbol. */
85 unsigned int min_dyn_reloc_index;
86
87 /* We must not create a stub for a symbol that has relocations
88 related to taking the function's address, i.e. any but
89 R_MIPS_CALL*16 ones -- see "MIPS ABI Supplement, 3rd Edition",
90 p. 4-20. */
91 boolean no_fn_stub;
92
93 /* If there is a stub that 32 bit functions should use to call this
94 16 bit function, this points to the section containing the stub. */
95 asection *fn_stub;
96
97 /* Whether we need the fn_stub; this is set if this symbol appears
98 in any relocs other than a 16 bit call. */
99 boolean need_fn_stub;
100
101 /* If there is a stub that 16 bit functions should use to call this
102 32 bit function, this points to the section containing the stub. */
103 asection *call_stub;
104
105 /* This is like the call_stub field, but it is used if the function
106 being called returns a floating point value. */
107 asection *call_fp_stub;
108 };
109
110 static bfd_reloc_status_type mips32_64bit_reloc
111 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
112 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
113 PARAMS ((bfd *, bfd_reloc_code_real_type));
114 static reloc_howto_type *mips_rtype_to_howto
115 PARAMS ((unsigned int));
116 static void mips_info_to_howto_rel
117 PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
118 static void mips_info_to_howto_rela
119 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
120 static void bfd_mips_elf32_swap_gptab_in
121 PARAMS ((bfd *, const Elf32_External_gptab *, Elf32_gptab *));
122 static void bfd_mips_elf32_swap_gptab_out
123 PARAMS ((bfd *, const Elf32_gptab *, Elf32_External_gptab *));
124 #if 0
125 static void bfd_mips_elf_swap_msym_in
126 PARAMS ((bfd *, const Elf32_External_Msym *, Elf32_Internal_Msym *));
127 #endif
128 static void bfd_mips_elf_swap_msym_out
129 PARAMS ((bfd *, const Elf32_Internal_Msym *, Elf32_External_Msym *));
130 static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *));
131 static boolean mips_elf_create_procedure_table
132 PARAMS ((PTR, bfd *, struct bfd_link_info *, asection *,
133 struct ecoff_debug_info *));
134 static INLINE int elf_mips_isa PARAMS ((flagword));
135 static INLINE unsigned long elf_mips_mach PARAMS ((flagword));
136 static INLINE char* elf_mips_abi_name PARAMS ((bfd *));
137 static boolean mips_elf_is_local_label_name
138 PARAMS ((bfd *, const char *));
139 static struct bfd_hash_entry *mips_elf_link_hash_newfunc
140 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
141 static int gptab_compare PARAMS ((const void *, const void *));
142 static bfd_reloc_status_type mips16_jump_reloc
143 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
144 static bfd_reloc_status_type mips16_gprel_reloc
145 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
146 static boolean mips_elf_create_compact_rel_section
147 PARAMS ((bfd *, struct bfd_link_info *));
148 static boolean mips_elf_create_got_section
149 PARAMS ((bfd *, struct bfd_link_info *));
150 static bfd_reloc_status_type mips_elf_final_gp
151 PARAMS ((bfd *, asymbol *, boolean, char **, bfd_vma *));
152 static bfd_byte *elf32_mips_get_relocated_section_contents
153 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
154 bfd_byte *, boolean, asymbol **));
155 static asection *mips_elf_create_msym_section
156 PARAMS ((bfd *));
157 static void mips_elf_irix6_finish_dynamic_symbol
158 PARAMS ((bfd *, const char *, Elf_Internal_Sym *));
159 static bfd_vma mips_elf_sign_extend PARAMS ((bfd_vma, int));
160 static boolean mips_elf_overflow_p PARAMS ((bfd_vma, int));
161 static bfd_vma mips_elf_high PARAMS ((bfd_vma));
162 static bfd_vma mips_elf_higher PARAMS ((bfd_vma));
163 static bfd_vma mips_elf_highest PARAMS ((bfd_vma));
164 static bfd_vma mips_elf_global_got_index
165 PARAMS ((bfd *, struct elf_link_hash_entry *));
166 static bfd_vma mips_elf_local_got_index
167 PARAMS ((bfd *, struct bfd_link_info *, bfd_vma));
168 static bfd_vma mips_elf_got_offset_from_index
169 PARAMS ((bfd *, bfd *, bfd_vma));
170 static boolean mips_elf_record_global_got_symbol
171 PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *,
172 struct mips_got_info *));
173 static bfd_vma mips_elf_got_page
174 PARAMS ((bfd *, struct bfd_link_info *, bfd_vma, bfd_vma *));
175 static const Elf_Internal_Rela *mips_elf_next_relocation
176 PARAMS ((unsigned int, const Elf_Internal_Rela *,
177 const Elf_Internal_Rela *));
178 static bfd_reloc_status_type mips_elf_calculate_relocation
179 PARAMS ((bfd *, bfd *, asection *, struct bfd_link_info *,
180 const Elf_Internal_Rela *, bfd_vma, reloc_howto_type *,
181 Elf_Internal_Sym *, asection **, bfd_vma *, const char **,
182 boolean *));
183 static bfd_vma mips_elf_obtain_contents
184 PARAMS ((reloc_howto_type *, const Elf_Internal_Rela *, bfd *, bfd_byte *));
185 static boolean mips_elf_perform_relocation
186 PARAMS ((struct bfd_link_info *, reloc_howto_type *,
187 const Elf_Internal_Rela *, bfd_vma,
188 bfd *, asection *, bfd_byte *, boolean));
189 static boolean mips_elf_assign_gp PARAMS ((bfd *, bfd_vma *));
190 static boolean mips_elf_sort_hash_table_f
191 PARAMS ((struct mips_elf_link_hash_entry *, PTR));
192 static boolean mips_elf_sort_hash_table
193 PARAMS ((struct bfd_link_info *, unsigned long));
194 static asection * mips_elf_got_section PARAMS ((bfd *));
195 static struct mips_got_info *mips_elf_got_info
196 PARAMS ((bfd *, asection **));
197 static boolean mips_elf_local_relocation_p
198 PARAMS ((bfd *, const Elf_Internal_Rela *, asection **, boolean));
199 static bfd_vma mips_elf_create_local_got_entry
200 PARAMS ((bfd *, struct mips_got_info *, asection *, bfd_vma));
201 static bfd_vma mips_elf_got16_entry
202 PARAMS ((bfd *, struct bfd_link_info *, bfd_vma, boolean));
203 static boolean mips_elf_create_dynamic_relocation
204 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Rela *,
205 struct mips_elf_link_hash_entry *, asection *,
206 bfd_vma, bfd_vma *, asection *));
207 static void mips_elf_allocate_dynamic_relocations
208 PARAMS ((bfd *, unsigned int));
209 static boolean mips_elf_stub_section_p
210 PARAMS ((bfd *, asection *));
211 static int sort_dynamic_relocs
212 PARAMS ((const void *, const void *));
213 static void _bfd_mips_elf_hide_symbol
214 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
215 static void _bfd_mips_elf_copy_indirect_symbol
216 PARAMS ((struct elf_link_hash_entry *,
217 struct elf_link_hash_entry *));
218 static boolean _bfd_elf32_mips_grok_prstatus
219 PARAMS ((bfd *, Elf_Internal_Note *));
220 static boolean _bfd_elf32_mips_grok_psinfo
221 PARAMS ((bfd *, Elf_Internal_Note *));
222
223 extern const bfd_target bfd_elf32_tradbigmips_vec;
224 extern const bfd_target bfd_elf32_tradlittlemips_vec;
225 #ifdef BFD64
226 extern const bfd_target bfd_elf64_tradbigmips_vec;
227 extern const bfd_target bfd_elf64_tradlittlemips_vec;
228 #endif
229
230 /* The level of IRIX compatibility we're striving for. */
231
232 typedef enum {
233 ict_none,
234 ict_irix5,
235 ict_irix6
236 } irix_compat_t;
237
238 /* This will be used when we sort the dynamic relocation records. */
239 static bfd *reldyn_sorting_bfd;
240
241 /* Nonzero if ABFD is using the N32 ABI. */
242
243 #define ABI_N32_P(abfd) \
244 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0)
245
246 /* Nonzero if ABFD is using the 64-bit ABI. */
247 #define ABI_64_P(abfd) \
248 ((elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64) != 0)
249
250 /* Depending on the target vector we generate some version of Irix
251 executables or "normal" MIPS ELF ABI executables. */
252 #ifdef BFD64
253 #define IRIX_COMPAT(abfd) \
254 (((abfd->xvec == &bfd_elf64_tradbigmips_vec) || \
255 (abfd->xvec == &bfd_elf64_tradlittlemips_vec) || \
256 (abfd->xvec == &bfd_elf32_tradbigmips_vec) || \
257 (abfd->xvec == &bfd_elf32_tradlittlemips_vec)) ? ict_none : \
258 ((ABI_N32_P (abfd) || ABI_64_P (abfd)) ? ict_irix6 : ict_irix5))
259 #else
260 #define IRIX_COMPAT(abfd) \
261 (((abfd->xvec == &bfd_elf32_tradbigmips_vec) || \
262 (abfd->xvec == &bfd_elf32_tradlittlemips_vec)) ? ict_none : \
263 ((ABI_N32_P (abfd) || ABI_64_P (abfd)) ? ict_irix6 : ict_irix5))
264 #endif
265
266 /* Whether we are trying to be compatible with IRIX at all. */
267 #define SGI_COMPAT(abfd) \
268 (IRIX_COMPAT (abfd) != ict_none)
269
270 /* The name of the msym section. */
271 #define MIPS_ELF_MSYM_SECTION_NAME(abfd) ".msym"
272
273 /* The name of the srdata section. */
274 #define MIPS_ELF_SRDATA_SECTION_NAME(abfd) ".srdata"
275
276 /* The name of the options section. */
277 #define MIPS_ELF_OPTIONS_SECTION_NAME(abfd) \
278 (IRIX_COMPAT (abfd) == ict_irix6 ? ".MIPS.options" : ".options")
279
280 /* The name of the stub section. */
281 #define MIPS_ELF_STUB_SECTION_NAME(abfd) \
282 (IRIX_COMPAT (abfd) == ict_irix6 ? ".MIPS.stubs" : ".stub")
283
284 /* The name of the dynamic relocation section. */
285 #define MIPS_ELF_REL_DYN_SECTION_NAME(abfd) ".rel.dyn"
286
287 /* The size of an external REL relocation. */
288 #define MIPS_ELF_REL_SIZE(abfd) \
289 (get_elf_backend_data (abfd)->s->sizeof_rel)
290
291 /* The size of an external dynamic table entry. */
292 #define MIPS_ELF_DYN_SIZE(abfd) \
293 (get_elf_backend_data (abfd)->s->sizeof_dyn)
294
295 /* The size of a GOT entry. */
296 #define MIPS_ELF_GOT_SIZE(abfd) \
297 (get_elf_backend_data (abfd)->s->arch_size / 8)
298
299 /* The size of a symbol-table entry. */
300 #define MIPS_ELF_SYM_SIZE(abfd) \
301 (get_elf_backend_data (abfd)->s->sizeof_sym)
302
303 /* The default alignment for sections, as a power of two. */
304 #define MIPS_ELF_LOG_FILE_ALIGN(abfd) \
305 (get_elf_backend_data (abfd)->s->file_align == 8 ? 3 : 2)
306
307 /* Get word-sized data. */
308 #define MIPS_ELF_GET_WORD(abfd, ptr) \
309 (ABI_64_P (abfd) ? bfd_get_64 (abfd, ptr) : bfd_get_32 (abfd, ptr))
310
311 /* Put out word-sized data. */
312 #define MIPS_ELF_PUT_WORD(abfd, val, ptr) \
313 (ABI_64_P (abfd) \
314 ? bfd_put_64 (abfd, val, ptr) \
315 : bfd_put_32 (abfd, val, ptr))
316
317 /* Add a dynamic symbol table-entry. */
318 #ifdef BFD64
319 #define MIPS_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
320 (ABI_64_P (elf_hash_table (info)->dynobj) \
321 ? bfd_elf64_add_dynamic_entry (info, (bfd_vma) tag, (bfd_vma) val) \
322 : bfd_elf32_add_dynamic_entry (info, (bfd_vma) tag, (bfd_vma) val))
323 #else
324 #define MIPS_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
325 (ABI_64_P (elf_hash_table (info)->dynobj) \
326 ? (boolean) (abort (), false) \
327 : bfd_elf32_add_dynamic_entry (info, (bfd_vma) tag, (bfd_vma) val))
328 #endif
329
330 /* The number of local .got entries we reserve. */
331 #define MIPS_RESERVED_GOTNO (2)
332
333 /* Instructions which appear in a stub. For some reason the stub is
334 slightly different on an SGI system. */
335 #define ELF_MIPS_GP_OFFSET(abfd) (SGI_COMPAT (abfd) ? 0x7ff0 : 0x8000)
336 #define STUB_LW(abfd) \
337 (SGI_COMPAT (abfd) \
338 ? (ABI_64_P (abfd) \
339 ? 0xdf998010 /* ld t9,0x8010(gp) */ \
340 : 0x8f998010) /* lw t9,0x8010(gp) */ \
341 : 0x8f998010) /* lw t9,0x8000(gp) */
342 #define STUB_MOVE(abfd) \
343 (SGI_COMPAT (abfd) ? 0x03e07825 : 0x03e07821) /* move t7,ra */
344 #define STUB_JALR 0x0320f809 /* jal t9 */
345 #define STUB_LI16(abfd) \
346 (SGI_COMPAT (abfd) ? 0x34180000 : 0x24180000) /* ori t8,zero,0 */
347 #define MIPS_FUNCTION_STUB_SIZE (16)
348
349 #if 0
350 /* We no longer try to identify particular sections for the .dynsym
351 section. When we do, we wind up crashing if there are other random
352 sections with relocations. */
353
354 /* Names of sections which appear in the .dynsym section in an Irix 5
355 executable. */
356
357 static const char * const mips_elf_dynsym_sec_names[] =
358 {
359 ".text",
360 ".init",
361 ".fini",
362 ".data",
363 ".rodata",
364 ".sdata",
365 ".sbss",
366 ".bss",
367 NULL
368 };
369
370 #define SIZEOF_MIPS_DYNSYM_SECNAMES \
371 (sizeof mips_elf_dynsym_sec_names / sizeof mips_elf_dynsym_sec_names[0])
372
373 /* The number of entries in mips_elf_dynsym_sec_names which go in the
374 text segment. */
375
376 #define MIPS_TEXT_DYNSYM_SECNO (3)
377
378 #endif /* 0 */
379
380 /* The names of the runtime procedure table symbols used on Irix 5. */
381
382 static const char * const mips_elf_dynsym_rtproc_names[] =
383 {
384 "_procedure_table",
385 "_procedure_string_table",
386 "_procedure_table_size",
387 NULL
388 };
389
390 /* These structures are used to generate the .compact_rel section on
391 Irix 5. */
392
393 typedef struct
394 {
395 unsigned long id1; /* Always one? */
396 unsigned long num; /* Number of compact relocation entries. */
397 unsigned long id2; /* Always two? */
398 unsigned long offset; /* The file offset of the first relocation. */
399 unsigned long reserved0; /* Zero? */
400 unsigned long reserved1; /* Zero? */
401 } Elf32_compact_rel;
402
403 typedef struct
404 {
405 bfd_byte id1[4];
406 bfd_byte num[4];
407 bfd_byte id2[4];
408 bfd_byte offset[4];
409 bfd_byte reserved0[4];
410 bfd_byte reserved1[4];
411 } Elf32_External_compact_rel;
412
413 typedef struct
414 {
415 unsigned int ctype : 1; /* 1: long 0: short format. See below. */
416 unsigned int rtype : 4; /* Relocation types. See below. */
417 unsigned int dist2to : 8;
418 unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */
419 unsigned long konst; /* KONST field. See below. */
420 unsigned long vaddr; /* VADDR to be relocated. */
421 } Elf32_crinfo;
422
423 typedef struct
424 {
425 unsigned int ctype : 1; /* 1: long 0: short format. See below. */
426 unsigned int rtype : 4; /* Relocation types. See below. */
427 unsigned int dist2to : 8;
428 unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */
429 unsigned long konst; /* KONST field. See below. */
430 } Elf32_crinfo2;
431
432 typedef struct
433 {
434 bfd_byte info[4];
435 bfd_byte konst[4];
436 bfd_byte vaddr[4];
437 } Elf32_External_crinfo;
438
439 typedef struct
440 {
441 bfd_byte info[4];
442 bfd_byte konst[4];
443 } Elf32_External_crinfo2;
444
445 /* These are the constants used to swap the bitfields in a crinfo. */
446
447 #define CRINFO_CTYPE (0x1)
448 #define CRINFO_CTYPE_SH (31)
449 #define CRINFO_RTYPE (0xf)
450 #define CRINFO_RTYPE_SH (27)
451 #define CRINFO_DIST2TO (0xff)
452 #define CRINFO_DIST2TO_SH (19)
453 #define CRINFO_RELVADDR (0x7ffff)
454 #define CRINFO_RELVADDR_SH (0)
455
456 /* A compact relocation info has long (3 words) or short (2 words)
457 formats. A short format doesn't have VADDR field and relvaddr
458 fields contains ((VADDR - vaddr of the previous entry) >> 2). */
459 #define CRF_MIPS_LONG 1
460 #define CRF_MIPS_SHORT 0
461
462 /* There are 4 types of compact relocation at least. The value KONST
463 has different meaning for each type:
464
465 (type) (konst)
466 CT_MIPS_REL32 Address in data
467 CT_MIPS_WORD Address in word (XXX)
468 CT_MIPS_GPHI_LO GP - vaddr
469 CT_MIPS_JMPAD Address to jump
470 */
471
472 #define CRT_MIPS_REL32 0xa
473 #define CRT_MIPS_WORD 0xb
474 #define CRT_MIPS_GPHI_LO 0xc
475 #define CRT_MIPS_JMPAD 0xd
476
477 #define mips_elf_set_cr_format(x,format) ((x).ctype = (format))
478 #define mips_elf_set_cr_type(x,type) ((x).rtype = (type))
479 #define mips_elf_set_cr_dist2to(x,v) ((x).dist2to = (v))
480 #define mips_elf_set_cr_relvaddr(x,d) ((x).relvaddr = (d)<<2)
481
482 static void bfd_elf32_swap_compact_rel_out
483 PARAMS ((bfd *, const Elf32_compact_rel *, Elf32_External_compact_rel *));
484 static void bfd_elf32_swap_crinfo_out
485 PARAMS ((bfd *, const Elf32_crinfo *, Elf32_External_crinfo *));
486
487 #define USE_REL 1 /* MIPS uses REL relocations instead of RELA */
488
489 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
490 from smaller values. Start with zero, widen, *then* decrement. */
491 #define MINUS_ONE (((bfd_vma)0) - 1)
492
493 static reloc_howto_type elf_mips_howto_table[] =
494 {
495 /* No relocation. */
496 HOWTO (R_MIPS_NONE, /* type */
497 0, /* rightshift */
498 0, /* size (0 = byte, 1 = short, 2 = long) */
499 0, /* bitsize */
500 false, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_dont, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_MIPS_NONE", /* name */
505 false, /* partial_inplace */
506 0, /* src_mask */
507 0, /* dst_mask */
508 false), /* pcrel_offset */
509
510 /* 16 bit relocation. */
511 HOWTO (R_MIPS_16, /* 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_bitfield, /* complain_on_overflow */
518 bfd_elf_generic_reloc, /* special_function */
519 "R_MIPS_16", /* name */
520 true, /* partial_inplace */
521 0xffff, /* src_mask */
522 0xffff, /* dst_mask */
523 false), /* pcrel_offset */
524
525 /* 32 bit relocation. */
526 HOWTO (R_MIPS_32, /* type */
527 0, /* rightshift */
528 2, /* size (0 = byte, 1 = short, 2 = long) */
529 32, /* bitsize */
530 false, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_bitfield, /* complain_on_overflow */
533 bfd_elf_generic_reloc, /* special_function */
534 "R_MIPS_32", /* name */
535 true, /* partial_inplace */
536 0xffffffff, /* src_mask */
537 0xffffffff, /* dst_mask */
538 false), /* pcrel_offset */
539
540 /* 32 bit symbol relative relocation. */
541 HOWTO (R_MIPS_REL32, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 false, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_bitfield, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_MIPS_REL32", /* name */
550 true, /* partial_inplace */
551 0xffffffff, /* src_mask */
552 0xffffffff, /* dst_mask */
553 false), /* pcrel_offset */
554
555 /* 26 bit jump address. */
556 HOWTO (R_MIPS_26, /* type */
557 2, /* rightshift */
558 2, /* size (0 = byte, 1 = short, 2 = long) */
559 26, /* bitsize */
560 false, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_dont, /* complain_on_overflow */
563 /* This needs complex overflow
564 detection, because the upper four
565 bits must match the PC + 4. */
566 bfd_elf_generic_reloc, /* special_function */
567 "R_MIPS_26", /* name */
568 true, /* partial_inplace */
569 0x3ffffff, /* src_mask */
570 0x3ffffff, /* dst_mask */
571 false), /* pcrel_offset */
572
573 /* High 16 bits of symbol value. */
574 HOWTO (R_MIPS_HI16, /* type */
575 0, /* rightshift */
576 2, /* size (0 = byte, 1 = short, 2 = long) */
577 16, /* bitsize */
578 false, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_dont, /* complain_on_overflow */
581 _bfd_mips_elf_hi16_reloc, /* special_function */
582 "R_MIPS_HI16", /* name */
583 true, /* partial_inplace */
584 0xffff, /* src_mask */
585 0xffff, /* dst_mask */
586 false), /* pcrel_offset */
587
588 /* Low 16 bits of symbol value. */
589 HOWTO (R_MIPS_LO16, /* type */
590 0, /* rightshift */
591 2, /* size (0 = byte, 1 = short, 2 = long) */
592 16, /* bitsize */
593 false, /* pc_relative */
594 0, /* bitpos */
595 complain_overflow_dont, /* complain_on_overflow */
596 _bfd_mips_elf_lo16_reloc, /* special_function */
597 "R_MIPS_LO16", /* name */
598 true, /* partial_inplace */
599 0xffff, /* src_mask */
600 0xffff, /* dst_mask */
601 false), /* pcrel_offset */
602
603 /* GP relative reference. */
604 HOWTO (R_MIPS_GPREL16, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 16, /* bitsize */
608 false, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_signed, /* complain_on_overflow */
611 _bfd_mips_elf_gprel16_reloc, /* special_function */
612 "R_MIPS_GPREL16", /* name */
613 true, /* partial_inplace */
614 0xffff, /* src_mask */
615 0xffff, /* dst_mask */
616 false), /* pcrel_offset */
617
618 /* Reference to literal section. */
619 HOWTO (R_MIPS_LITERAL, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 16, /* bitsize */
623 false, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_signed, /* complain_on_overflow */
626 _bfd_mips_elf_gprel16_reloc, /* special_function */
627 "R_MIPS_LITERAL", /* name */
628 true, /* partial_inplace */
629 0xffff, /* src_mask */
630 0xffff, /* dst_mask */
631 false), /* pcrel_offset */
632
633 /* Reference to global offset table. */
634 HOWTO (R_MIPS_GOT16, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 16, /* bitsize */
638 false, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 _bfd_mips_elf_got16_reloc, /* special_function */
642 "R_MIPS_GOT16", /* name */
643 false, /* partial_inplace */
644 0xffff, /* src_mask */
645 0xffff, /* dst_mask */
646 false), /* pcrel_offset */
647
648 /* 16 bit PC relative reference. */
649 HOWTO (R_MIPS_PC16, /* type */
650 0, /* rightshift */
651 2, /* size (0 = byte, 1 = short, 2 = long) */
652 16, /* bitsize */
653 true, /* pc_relative */
654 0, /* bitpos */
655 complain_overflow_signed, /* complain_on_overflow */
656 bfd_elf_generic_reloc, /* special_function */
657 "R_MIPS_PC16", /* name */
658 true, /* partial_inplace */
659 0xffff, /* src_mask */
660 0xffff, /* dst_mask */
661 true), /* pcrel_offset */
662
663 /* 16 bit call through global offset table. */
664 HOWTO (R_MIPS_CALL16, /* type */
665 0, /* rightshift */
666 2, /* size (0 = byte, 1 = short, 2 = long) */
667 16, /* bitsize */
668 false, /* pc_relative */
669 0, /* bitpos */
670 complain_overflow_signed, /* complain_on_overflow */
671 bfd_elf_generic_reloc, /* special_function */
672 "R_MIPS_CALL16", /* name */
673 false, /* partial_inplace */
674 0xffff, /* src_mask */
675 0xffff, /* dst_mask */
676 false), /* pcrel_offset */
677
678 /* 32 bit GP relative reference. */
679 HOWTO (R_MIPS_GPREL32, /* type */
680 0, /* rightshift */
681 2, /* size (0 = byte, 1 = short, 2 = long) */
682 32, /* bitsize */
683 false, /* pc_relative */
684 0, /* bitpos */
685 complain_overflow_bitfield, /* complain_on_overflow */
686 _bfd_mips_elf_gprel32_reloc, /* special_function */
687 "R_MIPS_GPREL32", /* name */
688 true, /* partial_inplace */
689 0xffffffff, /* src_mask */
690 0xffffffff, /* dst_mask */
691 false), /* pcrel_offset */
692
693 /* The remaining relocs are defined on Irix 5, although they are
694 not defined by the ABI. */
695 EMPTY_HOWTO (13),
696 EMPTY_HOWTO (14),
697 EMPTY_HOWTO (15),
698
699 /* A 5 bit shift field. */
700 HOWTO (R_MIPS_SHIFT5, /* type */
701 0, /* rightshift */
702 2, /* size (0 = byte, 1 = short, 2 = long) */
703 5, /* bitsize */
704 false, /* pc_relative */
705 6, /* bitpos */
706 complain_overflow_bitfield, /* complain_on_overflow */
707 bfd_elf_generic_reloc, /* special_function */
708 "R_MIPS_SHIFT5", /* name */
709 true, /* partial_inplace */
710 0x000007c0, /* src_mask */
711 0x000007c0, /* dst_mask */
712 false), /* pcrel_offset */
713
714 /* A 6 bit shift field. */
715 /* FIXME: This is not handled correctly; a special function is
716 needed to put the most significant bit in the right place. */
717 HOWTO (R_MIPS_SHIFT6, /* type */
718 0, /* rightshift */
719 2, /* size (0 = byte, 1 = short, 2 = long) */
720 6, /* bitsize */
721 false, /* pc_relative */
722 6, /* bitpos */
723 complain_overflow_bitfield, /* complain_on_overflow */
724 bfd_elf_generic_reloc, /* special_function */
725 "R_MIPS_SHIFT6", /* name */
726 true, /* partial_inplace */
727 0x000007c4, /* src_mask */
728 0x000007c4, /* dst_mask */
729 false), /* pcrel_offset */
730
731 /* A 64 bit relocation. */
732 HOWTO (R_MIPS_64, /* type */
733 0, /* rightshift */
734 4, /* size (0 = byte, 1 = short, 2 = long) */
735 64, /* bitsize */
736 false, /* pc_relative */
737 0, /* bitpos */
738 complain_overflow_bitfield, /* complain_on_overflow */
739 mips32_64bit_reloc, /* special_function */
740 "R_MIPS_64", /* name */
741 true, /* partial_inplace */
742 MINUS_ONE, /* src_mask */
743 MINUS_ONE, /* dst_mask */
744 false), /* pcrel_offset */
745
746 /* Displacement in the global offset table. */
747 HOWTO (R_MIPS_GOT_DISP, /* type */
748 0, /* rightshift */
749 2, /* size (0 = byte, 1 = short, 2 = long) */
750 16, /* bitsize */
751 false, /* pc_relative */
752 0, /* bitpos */
753 complain_overflow_bitfield, /* complain_on_overflow */
754 bfd_elf_generic_reloc, /* special_function */
755 "R_MIPS_GOT_DISP", /* name */
756 true, /* partial_inplace */
757 0x0000ffff, /* src_mask */
758 0x0000ffff, /* dst_mask */
759 false), /* pcrel_offset */
760
761 /* Displacement to page pointer in the global offset table. */
762 HOWTO (R_MIPS_GOT_PAGE, /* type */
763 0, /* rightshift */
764 2, /* size (0 = byte, 1 = short, 2 = long) */
765 16, /* bitsize */
766 false, /* pc_relative */
767 0, /* bitpos */
768 complain_overflow_bitfield, /* complain_on_overflow */
769 bfd_elf_generic_reloc, /* special_function */
770 "R_MIPS_GOT_PAGE", /* name */
771 true, /* partial_inplace */
772 0x0000ffff, /* src_mask */
773 0x0000ffff, /* dst_mask */
774 false), /* pcrel_offset */
775
776 /* Offset from page pointer in the global offset table. */
777 HOWTO (R_MIPS_GOT_OFST, /* type */
778 0, /* rightshift */
779 2, /* size (0 = byte, 1 = short, 2 = long) */
780 16, /* bitsize */
781 false, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_bitfield, /* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_MIPS_GOT_OFST", /* name */
786 true, /* partial_inplace */
787 0x0000ffff, /* src_mask */
788 0x0000ffff, /* dst_mask */
789 false), /* pcrel_offset */
790
791 /* High 16 bits of displacement in global offset table. */
792 HOWTO (R_MIPS_GOT_HI16, /* type */
793 0, /* rightshift */
794 2, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 false, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_MIPS_GOT_HI16", /* name */
801 true, /* partial_inplace */
802 0x0000ffff, /* src_mask */
803 0x0000ffff, /* dst_mask */
804 false), /* pcrel_offset */
805
806 /* Low 16 bits of displacement in global offset table. */
807 HOWTO (R_MIPS_GOT_LO16, /* type */
808 0, /* rightshift */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
810 16, /* bitsize */
811 false, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_MIPS_GOT_LO16", /* name */
816 true, /* partial_inplace */
817 0x0000ffff, /* src_mask */
818 0x0000ffff, /* dst_mask */
819 false), /* pcrel_offset */
820
821 /* 64 bit subtraction. Used in the N32 ABI. */
822 HOWTO (R_MIPS_SUB, /* type */
823 0, /* rightshift */
824 4, /* size (0 = byte, 1 = short, 2 = long) */
825 64, /* bitsize */
826 false, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_bitfield, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 "R_MIPS_SUB", /* name */
831 true, /* partial_inplace */
832 MINUS_ONE, /* src_mask */
833 MINUS_ONE, /* dst_mask */
834 false), /* pcrel_offset */
835
836 /* Used to cause the linker to insert and delete instructions? */
837 EMPTY_HOWTO (R_MIPS_INSERT_A),
838 EMPTY_HOWTO (R_MIPS_INSERT_B),
839 EMPTY_HOWTO (R_MIPS_DELETE),
840
841 /* Get the higher value of a 64 bit addend. */
842 HOWTO (R_MIPS_HIGHER, /* type */
843 0, /* rightshift */
844 2, /* 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_MIPS_HIGHER", /* name */
851 true, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 false), /* pcrel_offset */
855
856 /* Get the highest value of a 64 bit addend. */
857 HOWTO (R_MIPS_HIGHEST, /* type */
858 0, /* rightshift */
859 2, /* size (0 = byte, 1 = short, 2 = long) */
860 16, /* bitsize */
861 false, /* pc_relative */
862 0, /* bitpos */
863 complain_overflow_dont, /* complain_on_overflow */
864 bfd_elf_generic_reloc, /* special_function */
865 "R_MIPS_HIGHEST", /* name */
866 true, /* partial_inplace */
867 0, /* src_mask */
868 0xffff, /* dst_mask */
869 false), /* pcrel_offset */
870
871 /* High 16 bits of displacement in global offset table. */
872 HOWTO (R_MIPS_CALL_HI16, /* type */
873 0, /* rightshift */
874 2, /* size (0 = byte, 1 = short, 2 = long) */
875 16, /* bitsize */
876 false, /* pc_relative */
877 0, /* bitpos */
878 complain_overflow_dont, /* complain_on_overflow */
879 bfd_elf_generic_reloc, /* special_function */
880 "R_MIPS_CALL_HI16", /* name */
881 true, /* partial_inplace */
882 0x0000ffff, /* src_mask */
883 0x0000ffff, /* dst_mask */
884 false), /* pcrel_offset */
885
886 /* Low 16 bits of displacement in global offset table. */
887 HOWTO (R_MIPS_CALL_LO16, /* type */
888 0, /* rightshift */
889 2, /* size (0 = byte, 1 = short, 2 = long) */
890 16, /* bitsize */
891 false, /* pc_relative */
892 0, /* bitpos */
893 complain_overflow_dont, /* complain_on_overflow */
894 bfd_elf_generic_reloc, /* special_function */
895 "R_MIPS_CALL_LO16", /* name */
896 true, /* partial_inplace */
897 0x0000ffff, /* src_mask */
898 0x0000ffff, /* dst_mask */
899 false), /* pcrel_offset */
900
901 /* Section displacement. */
902 HOWTO (R_MIPS_SCN_DISP, /* type */
903 0, /* rightshift */
904 2, /* size (0 = byte, 1 = short, 2 = long) */
905 32, /* bitsize */
906 false, /* pc_relative */
907 0, /* bitpos */
908 complain_overflow_dont, /* complain_on_overflow */
909 bfd_elf_generic_reloc, /* special_function */
910 "R_MIPS_SCN_DISP", /* name */
911 false, /* partial_inplace */
912 0xffffffff, /* src_mask */
913 0xffffffff, /* dst_mask */
914 false), /* pcrel_offset */
915
916 EMPTY_HOWTO (R_MIPS_REL16),
917 EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE),
918 EMPTY_HOWTO (R_MIPS_PJUMP),
919 EMPTY_HOWTO (R_MIPS_RELGOT),
920
921 /* Protected jump conversion. This is an optimization hint. No
922 relocation is required for correctness. */
923 HOWTO (R_MIPS_JALR, /* type */
924 0, /* rightshift */
925 0, /* size (0 = byte, 1 = short, 2 = long) */
926 0, /* bitsize */
927 false, /* pc_relative */
928 0, /* bitpos */
929 complain_overflow_dont, /* complain_on_overflow */
930 bfd_elf_generic_reloc, /* special_function */
931 "R_MIPS_JALR", /* name */
932 false, /* partial_inplace */
933 0x00000000, /* src_mask */
934 0x00000000, /* dst_mask */
935 false), /* pcrel_offset */
936 };
937
938 /* The reloc used for BFD_RELOC_CTOR when doing a 64 bit link. This
939 is a hack to make the linker think that we need 64 bit values. */
940 static reloc_howto_type elf_mips_ctor64_howto =
941 HOWTO (R_MIPS_64, /* type */
942 0, /* rightshift */
943 4, /* size (0 = byte, 1 = short, 2 = long) */
944 32, /* bitsize */
945 false, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_signed, /* complain_on_overflow */
948 mips32_64bit_reloc, /* special_function */
949 "R_MIPS_64", /* name */
950 true, /* partial_inplace */
951 0xffffffff, /* src_mask */
952 0xffffffff, /* dst_mask */
953 false); /* pcrel_offset */
954
955 /* The reloc used for the mips16 jump instruction. */
956 static reloc_howto_type elf_mips16_jump_howto =
957 HOWTO (R_MIPS16_26, /* type */
958 2, /* rightshift */
959 2, /* size (0 = byte, 1 = short, 2 = long) */
960 26, /* bitsize */
961 false, /* pc_relative */
962 0, /* bitpos */
963 complain_overflow_dont, /* complain_on_overflow */
964 /* This needs complex overflow
965 detection, because the upper four
966 bits must match the PC. */
967 mips16_jump_reloc, /* special_function */
968 "R_MIPS16_26", /* name */
969 true, /* partial_inplace */
970 0x3ffffff, /* src_mask */
971 0x3ffffff, /* dst_mask */
972 false); /* pcrel_offset */
973
974 /* The reloc used for the mips16 gprel instruction. */
975 static reloc_howto_type elf_mips16_gprel_howto =
976 HOWTO (R_MIPS16_GPREL, /* type */
977 0, /* rightshift */
978 2, /* size (0 = byte, 1 = short, 2 = long) */
979 16, /* bitsize */
980 false, /* pc_relative */
981 0, /* bitpos */
982 complain_overflow_signed, /* complain_on_overflow */
983 mips16_gprel_reloc, /* special_function */
984 "R_MIPS16_GPREL", /* name */
985 true, /* partial_inplace */
986 0x07ff001f, /* src_mask */
987 0x07ff001f, /* dst_mask */
988 false); /* pcrel_offset */
989
990 /* GNU extensions for embedded-pic. */
991 /* High 16 bits of symbol value, pc-relative. */
992 static reloc_howto_type elf_mips_gnu_rel_hi16 =
993 HOWTO (R_MIPS_GNU_REL_HI16, /* type */
994 0, /* rightshift */
995 2, /* size (0 = byte, 1 = short, 2 = long) */
996 16, /* bitsize */
997 true, /* pc_relative */
998 0, /* bitpos */
999 complain_overflow_dont, /* complain_on_overflow */
1000 _bfd_mips_elf_hi16_reloc, /* special_function */
1001 "R_MIPS_GNU_REL_HI16", /* name */
1002 true, /* partial_inplace */
1003 0xffff, /* src_mask */
1004 0xffff, /* dst_mask */
1005 true); /* pcrel_offset */
1006
1007 /* Low 16 bits of symbol value, pc-relative. */
1008 static reloc_howto_type elf_mips_gnu_rel_lo16 =
1009 HOWTO (R_MIPS_GNU_REL_LO16, /* type */
1010 0, /* rightshift */
1011 2, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 true, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_dont, /* complain_on_overflow */
1016 _bfd_mips_elf_lo16_reloc, /* special_function */
1017 "R_MIPS_GNU_REL_LO16", /* name */
1018 true, /* partial_inplace */
1019 0xffff, /* src_mask */
1020 0xffff, /* dst_mask */
1021 true); /* pcrel_offset */
1022
1023 /* 16 bit offset for pc-relative branches. */
1024 static reloc_howto_type elf_mips_gnu_rel16_s2 =
1025 HOWTO (R_MIPS_GNU_REL16_S2, /* type */
1026 2, /* rightshift */
1027 2, /* size (0 = byte, 1 = short, 2 = long) */
1028 16, /* bitsize */
1029 true, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_signed, /* complain_on_overflow */
1032 bfd_elf_generic_reloc, /* special_function */
1033 "R_MIPS_GNU_REL16_S2", /* name */
1034 true, /* partial_inplace */
1035 0xffff, /* src_mask */
1036 0xffff, /* dst_mask */
1037 true); /* pcrel_offset */
1038
1039 /* 64 bit pc-relative. */
1040 static reloc_howto_type elf_mips_gnu_pcrel64 =
1041 HOWTO (R_MIPS_PC64, /* type */
1042 0, /* rightshift */
1043 4, /* size (0 = byte, 1 = short, 2 = long) */
1044 64, /* bitsize */
1045 true, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_signed, /* complain_on_overflow */
1048 bfd_elf_generic_reloc, /* special_function */
1049 "R_MIPS_PC64", /* name */
1050 true, /* partial_inplace */
1051 MINUS_ONE, /* src_mask */
1052 MINUS_ONE, /* dst_mask */
1053 true); /* pcrel_offset */
1054
1055 /* 32 bit pc-relative. */
1056 static reloc_howto_type elf_mips_gnu_pcrel32 =
1057 HOWTO (R_MIPS_PC32, /* type */
1058 0, /* rightshift */
1059 2, /* size (0 = byte, 1 = short, 2 = long) */
1060 32, /* bitsize */
1061 true, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_signed, /* complain_on_overflow */
1064 bfd_elf_generic_reloc, /* special_function */
1065 "R_MIPS_PC32", /* name */
1066 true, /* partial_inplace */
1067 0xffffffff, /* src_mask */
1068 0xffffffff, /* dst_mask */
1069 true); /* pcrel_offset */
1070
1071 /* GNU extension to record C++ vtable hierarchy */
1072 static reloc_howto_type elf_mips_gnu_vtinherit_howto =
1073 HOWTO (R_MIPS_GNU_VTINHERIT, /* type */
1074 0, /* rightshift */
1075 2, /* size (0 = byte, 1 = short, 2 = long) */
1076 0, /* bitsize */
1077 false, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 NULL, /* special_function */
1081 "R_MIPS_GNU_VTINHERIT", /* name */
1082 false, /* partial_inplace */
1083 0, /* src_mask */
1084 0, /* dst_mask */
1085 false); /* pcrel_offset */
1086
1087 /* GNU extension to record C++ vtable member usage */
1088 static reloc_howto_type elf_mips_gnu_vtentry_howto =
1089 HOWTO (R_MIPS_GNU_VTENTRY, /* type */
1090 0, /* rightshift */
1091 2, /* size (0 = byte, 1 = short, 2 = long) */
1092 0, /* bitsize */
1093 false, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_dont, /* complain_on_overflow */
1096 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1097 "R_MIPS_GNU_VTENTRY", /* name */
1098 false, /* partial_inplace */
1099 0, /* src_mask */
1100 0, /* dst_mask */
1101 false); /* pcrel_offset */
1102
1103 /* Do a R_MIPS_HI16 relocation. This has to be done in combination
1104 with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to
1105 the HI16. Here we just save the information we need; we do the
1106 actual relocation when we see the LO16. MIPS ELF requires that the
1107 LO16 immediately follow the HI16. As a GNU extension, we permit an
1108 arbitrary number of HI16 relocs to be associated with a single LO16
1109 reloc. This extension permits gcc to output the HI and LO relocs
1110 itself. */
1111
1112 struct mips_hi16
1113 {
1114 struct mips_hi16 *next;
1115 bfd_byte *addr;
1116 bfd_vma addend;
1117 };
1118
1119 /* FIXME: This should not be a static variable. */
1120
1121 static struct mips_hi16 *mips_hi16_list;
1122
1123 bfd_reloc_status_type
1124 _bfd_mips_elf_hi16_reloc (abfd,
1125 reloc_entry,
1126 symbol,
1127 data,
1128 input_section,
1129 output_bfd,
1130 error_message)
1131 bfd *abfd ATTRIBUTE_UNUSED;
1132 arelent *reloc_entry;
1133 asymbol *symbol;
1134 PTR data;
1135 asection *input_section;
1136 bfd *output_bfd;
1137 char **error_message;
1138 {
1139 bfd_reloc_status_type ret;
1140 bfd_vma relocation;
1141 struct mips_hi16 *n;
1142
1143 /* If we're relocating, and this an external symbol, we don't want
1144 to change anything. */
1145 if (output_bfd != (bfd *) NULL
1146 && (symbol->flags & BSF_SECTION_SYM) == 0
1147 && reloc_entry->addend == 0)
1148 {
1149 reloc_entry->address += input_section->output_offset;
1150 return bfd_reloc_ok;
1151 }
1152
1153 ret = bfd_reloc_ok;
1154
1155 if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
1156 {
1157 boolean relocateable;
1158 bfd_vma gp;
1159
1160 if (ret == bfd_reloc_undefined)
1161 abort ();
1162
1163 if (output_bfd != NULL)
1164 relocateable = true;
1165 else
1166 {
1167 relocateable = false;
1168 output_bfd = symbol->section->output_section->owner;
1169 }
1170
1171 ret = mips_elf_final_gp (output_bfd, symbol, relocateable,
1172 error_message, &gp);
1173 if (ret != bfd_reloc_ok)
1174 return ret;
1175
1176 relocation = gp - reloc_entry->address;
1177 }
1178 else
1179 {
1180 if (bfd_is_und_section (symbol->section)
1181 && output_bfd == (bfd *) NULL)
1182 ret = bfd_reloc_undefined;
1183
1184 if (bfd_is_com_section (symbol->section))
1185 relocation = 0;
1186 else
1187 relocation = symbol->value;
1188 }
1189
1190 relocation += symbol->section->output_section->vma;
1191 relocation += symbol->section->output_offset;
1192 relocation += reloc_entry->addend;
1193
1194 if (reloc_entry->address > input_section->_cooked_size)
1195 return bfd_reloc_outofrange;
1196
1197 /* Save the information, and let LO16 do the actual relocation. */
1198 n = (struct mips_hi16 *) bfd_malloc ((bfd_size_type) sizeof *n);
1199 if (n == NULL)
1200 return bfd_reloc_outofrange;
1201 n->addr = (bfd_byte *) data + reloc_entry->address;
1202 n->addend = relocation;
1203 n->next = mips_hi16_list;
1204 mips_hi16_list = n;
1205
1206 if (output_bfd != (bfd *) NULL)
1207 reloc_entry->address += input_section->output_offset;
1208
1209 return ret;
1210 }
1211
1212 /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit
1213 inplace relocation; this function exists in order to do the
1214 R_MIPS_HI16 relocation described above. */
1215
1216 bfd_reloc_status_type
1217 _bfd_mips_elf_lo16_reloc (abfd,
1218 reloc_entry,
1219 symbol,
1220 data,
1221 input_section,
1222 output_bfd,
1223 error_message)
1224 bfd *abfd;
1225 arelent *reloc_entry;
1226 asymbol *symbol;
1227 PTR data;
1228 asection *input_section;
1229 bfd *output_bfd;
1230 char **error_message;
1231 {
1232 arelent gp_disp_relent;
1233
1234 if (mips_hi16_list != NULL)
1235 {
1236 struct mips_hi16 *l;
1237
1238 l = mips_hi16_list;
1239 while (l != NULL)
1240 {
1241 unsigned long insn;
1242 unsigned long val;
1243 unsigned long vallo;
1244 struct mips_hi16 *next;
1245
1246 /* Do the HI16 relocation. Note that we actually don't need
1247 to know anything about the LO16 itself, except where to
1248 find the low 16 bits of the addend needed by the LO16. */
1249 insn = bfd_get_32 (abfd, l->addr);
1250 vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
1251 & 0xffff);
1252 val = ((insn & 0xffff) << 16) + vallo;
1253 val += l->addend;
1254
1255 /* The low order 16 bits are always treated as a signed
1256 value. Therefore, a negative value in the low order bits
1257 requires an adjustment in the high order bits. We need
1258 to make this adjustment in two ways: once for the bits we
1259 took from the data, and once for the bits we are putting
1260 back in to the data. */
1261 if ((vallo & 0x8000) != 0)
1262 val -= 0x10000;
1263 if ((val & 0x8000) != 0)
1264 val += 0x10000;
1265
1266 insn = (insn &~ (bfd_vma) 0xffff) | ((val >> 16) & 0xffff);
1267 bfd_put_32 (abfd, (bfd_vma) insn, l->addr);
1268
1269 if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
1270 {
1271 gp_disp_relent = *reloc_entry;
1272 reloc_entry = &gp_disp_relent;
1273 reloc_entry->addend = l->addend;
1274 }
1275
1276 next = l->next;
1277 free (l);
1278 l = next;
1279 }
1280
1281 mips_hi16_list = NULL;
1282 }
1283 else if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
1284 {
1285 bfd_reloc_status_type ret;
1286 bfd_vma gp, relocation;
1287
1288 /* FIXME: Does this case ever occur? */
1289
1290 ret = mips_elf_final_gp (output_bfd, symbol, true, error_message, &gp);
1291 if (ret != bfd_reloc_ok)
1292 return ret;
1293
1294 relocation = gp - reloc_entry->address;
1295 relocation += symbol->section->output_section->vma;
1296 relocation += symbol->section->output_offset;
1297 relocation += reloc_entry->addend;
1298
1299 if (reloc_entry->address > input_section->_cooked_size)
1300 return bfd_reloc_outofrange;
1301
1302 gp_disp_relent = *reloc_entry;
1303 reloc_entry = &gp_disp_relent;
1304 reloc_entry->addend = relocation - 4;
1305 }
1306
1307 /* Now do the LO16 reloc in the usual way. */
1308 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1309 input_section, output_bfd, error_message);
1310 }
1311
1312 /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset
1313 table used for PIC code. If the symbol is an external symbol, the
1314 instruction is modified to contain the offset of the appropriate
1315 entry in the global offset table. If the symbol is a section
1316 symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit
1317 addends are combined to form the real addend against the section
1318 symbol; the GOT16 is modified to contain the offset of an entry in
1319 the global offset table, and the LO16 is modified to offset it
1320 appropriately. Thus an offset larger than 16 bits requires a
1321 modified value in the global offset table.
1322
1323 This implementation suffices for the assembler, but the linker does
1324 not yet know how to create global offset tables. */
1325
1326 bfd_reloc_status_type
1327 _bfd_mips_elf_got16_reloc (abfd,
1328 reloc_entry,
1329 symbol,
1330 data,
1331 input_section,
1332 output_bfd,
1333 error_message)
1334 bfd *abfd;
1335 arelent *reloc_entry;
1336 asymbol *symbol;
1337 PTR data;
1338 asection *input_section;
1339 bfd *output_bfd;
1340 char **error_message;
1341 {
1342 /* If we're relocating, and this an external symbol, we don't want
1343 to change anything. */
1344 if (output_bfd != (bfd *) NULL
1345 && (symbol->flags & BSF_SECTION_SYM) == 0
1346 && reloc_entry->addend == 0)
1347 {
1348 reloc_entry->address += input_section->output_offset;
1349 return bfd_reloc_ok;
1350 }
1351
1352 /* If we're relocating, and this is a local symbol, we can handle it
1353 just like HI16. */
1354 if (output_bfd != (bfd *) NULL
1355 && (symbol->flags & BSF_SECTION_SYM) != 0)
1356 return _bfd_mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
1357 input_section, output_bfd, error_message);
1358
1359 abort ();
1360 }
1361
1362 /* Set the GP value for OUTPUT_BFD. Returns false if this is a
1363 dangerous relocation. */
1364
1365 static boolean
1366 mips_elf_assign_gp (output_bfd, pgp)
1367 bfd *output_bfd;
1368 bfd_vma *pgp;
1369 {
1370 unsigned int count;
1371 asymbol **sym;
1372 unsigned int i;
1373
1374 /* If we've already figured out what GP will be, just return it. */
1375 *pgp = _bfd_get_gp_value (output_bfd);
1376 if (*pgp)
1377 return true;
1378
1379 count = bfd_get_symcount (output_bfd);
1380 sym = bfd_get_outsymbols (output_bfd);
1381
1382 /* The linker script will have created a symbol named `_gp' with the
1383 appropriate value. */
1384 if (sym == (asymbol **) NULL)
1385 i = count;
1386 else
1387 {
1388 for (i = 0; i < count; i++, sym++)
1389 {
1390 register const char *name;
1391
1392 name = bfd_asymbol_name (*sym);
1393 if (*name == '_' && strcmp (name, "_gp") == 0)
1394 {
1395 *pgp = bfd_asymbol_value (*sym);
1396 _bfd_set_gp_value (output_bfd, *pgp);
1397 break;
1398 }
1399 }
1400 }
1401
1402 if (i >= count)
1403 {
1404 /* Only get the error once. */
1405 *pgp = 4;
1406 _bfd_set_gp_value (output_bfd, *pgp);
1407 return false;
1408 }
1409
1410 return true;
1411 }
1412
1413 /* We have to figure out the gp value, so that we can adjust the
1414 symbol value correctly. We look up the symbol _gp in the output
1415 BFD. If we can't find it, we're stuck. We cache it in the ELF
1416 target data. We don't need to adjust the symbol value for an
1417 external symbol if we are producing relocateable output. */
1418
1419 static bfd_reloc_status_type
1420 mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, pgp)
1421 bfd *output_bfd;
1422 asymbol *symbol;
1423 boolean relocateable;
1424 char **error_message;
1425 bfd_vma *pgp;
1426 {
1427 if (bfd_is_und_section (symbol->section)
1428 && ! relocateable)
1429 {
1430 *pgp = 0;
1431 return bfd_reloc_undefined;
1432 }
1433
1434 *pgp = _bfd_get_gp_value (output_bfd);
1435 if (*pgp == 0
1436 && (! relocateable
1437 || (symbol->flags & BSF_SECTION_SYM) != 0))
1438 {
1439 if (relocateable)
1440 {
1441 /* Make up a value. */
1442 *pgp = symbol->section->output_section->vma + 0x4000;
1443 _bfd_set_gp_value (output_bfd, *pgp);
1444 }
1445 else if (!mips_elf_assign_gp (output_bfd, pgp))
1446 {
1447 *error_message =
1448 (char *) _("GP relative relocation when _gp not defined");
1449 return bfd_reloc_dangerous;
1450 }
1451 }
1452
1453 return bfd_reloc_ok;
1454 }
1455
1456 /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
1457 become the offset from the gp register. This function also handles
1458 R_MIPS_LITERAL relocations, although those can be handled more
1459 cleverly because the entries in the .lit8 and .lit4 sections can be
1460 merged. */
1461
1462 static bfd_reloc_status_type gprel16_with_gp PARAMS ((bfd *, asymbol *,
1463 arelent *, asection *,
1464 boolean, PTR, bfd_vma));
1465
1466 bfd_reloc_status_type
1467 _bfd_mips_elf_gprel16_reloc (abfd, reloc_entry, symbol, data, input_section,
1468 output_bfd, error_message)
1469 bfd *abfd;
1470 arelent *reloc_entry;
1471 asymbol *symbol;
1472 PTR data;
1473 asection *input_section;
1474 bfd *output_bfd;
1475 char **error_message;
1476 {
1477 boolean relocateable;
1478 bfd_reloc_status_type ret;
1479 bfd_vma gp;
1480
1481 /* If we're relocating, and this is an external symbol with no
1482 addend, we don't want to change anything. We will only have an
1483 addend if this is a newly created reloc, not read from an ELF
1484 file. */
1485 if (output_bfd != (bfd *) NULL
1486 && (symbol->flags & BSF_SECTION_SYM) == 0
1487 && reloc_entry->addend == 0)
1488 {
1489 reloc_entry->address += input_section->output_offset;
1490 return bfd_reloc_ok;
1491 }
1492
1493 if (output_bfd != (bfd *) NULL)
1494 relocateable = true;
1495 else
1496 {
1497 relocateable = false;
1498 output_bfd = symbol->section->output_section->owner;
1499 }
1500
1501 ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
1502 &gp);
1503 if (ret != bfd_reloc_ok)
1504 return ret;
1505
1506 return gprel16_with_gp (abfd, symbol, reloc_entry, input_section,
1507 relocateable, data, gp);
1508 }
1509
1510 static bfd_reloc_status_type
1511 gprel16_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data,
1512 gp)
1513 bfd *abfd;
1514 asymbol *symbol;
1515 arelent *reloc_entry;
1516 asection *input_section;
1517 boolean relocateable;
1518 PTR data;
1519 bfd_vma gp;
1520 {
1521 bfd_vma relocation;
1522 unsigned long insn;
1523 unsigned long val;
1524
1525 if (bfd_is_com_section (symbol->section))
1526 relocation = 0;
1527 else
1528 relocation = symbol->value;
1529
1530 relocation += symbol->section->output_section->vma;
1531 relocation += symbol->section->output_offset;
1532
1533 if (reloc_entry->address > input_section->_cooked_size)
1534 return bfd_reloc_outofrange;
1535
1536 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1537
1538 /* Set val to the offset into the section or symbol. */
1539 if (reloc_entry->howto->src_mask == 0)
1540 {
1541 /* This case occurs with the 64-bit MIPS ELF ABI. */
1542 val = reloc_entry->addend;
1543 }
1544 else
1545 {
1546 val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff;
1547 if (val & 0x8000)
1548 val -= 0x10000;
1549 }
1550
1551 /* Adjust val for the final section location and GP value. If we
1552 are producing relocateable output, we don't want to do this for
1553 an external symbol. */
1554 if (! relocateable
1555 || (symbol->flags & BSF_SECTION_SYM) != 0)
1556 val += relocation - gp;
1557
1558 insn = (insn &~ (bfd_vma) 0xffff) | (val & 0xffff);
1559 bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + reloc_entry->address);
1560
1561 if (relocateable)
1562 reloc_entry->address += input_section->output_offset;
1563
1564 /* Make sure it fit in 16 bits. */
1565 if ((long) val >= 0x8000 || (long) val < -0x8000)
1566 return bfd_reloc_overflow;
1567
1568 return bfd_reloc_ok;
1569 }
1570
1571 /* Do a R_MIPS_GPREL32 relocation. Is this 32 bit value the offset
1572 from the gp register? XXX */
1573
1574 static bfd_reloc_status_type gprel32_with_gp PARAMS ((bfd *, asymbol *,
1575 arelent *, asection *,
1576 boolean, PTR, bfd_vma));
1577
1578 bfd_reloc_status_type
1579 _bfd_mips_elf_gprel32_reloc (abfd,
1580 reloc_entry,
1581 symbol,
1582 data,
1583 input_section,
1584 output_bfd,
1585 error_message)
1586 bfd *abfd;
1587 arelent *reloc_entry;
1588 asymbol *symbol;
1589 PTR data;
1590 asection *input_section;
1591 bfd *output_bfd;
1592 char **error_message;
1593 {
1594 boolean relocateable;
1595 bfd_reloc_status_type ret;
1596 bfd_vma gp;
1597
1598 /* If we're relocating, and this is an external symbol with no
1599 addend, we don't want to change anything. We will only have an
1600 addend if this is a newly created reloc, not read from an ELF
1601 file. */
1602 if (output_bfd != (bfd *) NULL
1603 && (symbol->flags & BSF_SECTION_SYM) == 0
1604 && reloc_entry->addend == 0)
1605 {
1606 *error_message = (char *)
1607 _("32bits gp relative relocation occurs for an external symbol");
1608 return bfd_reloc_outofrange;
1609 }
1610
1611 if (output_bfd != (bfd *) NULL)
1612 {
1613 relocateable = true;
1614 gp = _bfd_get_gp_value (output_bfd);
1615 }
1616 else
1617 {
1618 relocateable = false;
1619 output_bfd = symbol->section->output_section->owner;
1620
1621 ret = mips_elf_final_gp (output_bfd, symbol, relocateable,
1622 error_message, &gp);
1623 if (ret != bfd_reloc_ok)
1624 return ret;
1625 }
1626
1627 return gprel32_with_gp (abfd, symbol, reloc_entry, input_section,
1628 relocateable, data, gp);
1629 }
1630
1631 static bfd_reloc_status_type
1632 gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data,
1633 gp)
1634 bfd *abfd;
1635 asymbol *symbol;
1636 arelent *reloc_entry;
1637 asection *input_section;
1638 boolean relocateable;
1639 PTR data;
1640 bfd_vma gp;
1641 {
1642 bfd_vma relocation;
1643 unsigned long val;
1644
1645 if (bfd_is_com_section (symbol->section))
1646 relocation = 0;
1647 else
1648 relocation = symbol->value;
1649
1650 relocation += symbol->section->output_section->vma;
1651 relocation += symbol->section->output_offset;
1652
1653 if (reloc_entry->address > input_section->_cooked_size)
1654 return bfd_reloc_outofrange;
1655
1656 if (reloc_entry->howto->src_mask == 0)
1657 {
1658 /* This case arises with the 64-bit MIPS ELF ABI. */
1659 val = 0;
1660 }
1661 else
1662 val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1663
1664 /* Set val to the offset into the section or symbol. */
1665 val += reloc_entry->addend;
1666
1667 /* Adjust val for the final section location and GP value. If we
1668 are producing relocateable output, we don't want to do this for
1669 an external symbol. */
1670 if (! relocateable
1671 || (symbol->flags & BSF_SECTION_SYM) != 0)
1672 val += relocation - gp;
1673
1674 bfd_put_32 (abfd, (bfd_vma) val, (bfd_byte *) data + reloc_entry->address);
1675
1676 if (relocateable)
1677 reloc_entry->address += input_section->output_offset;
1678
1679 return bfd_reloc_ok;
1680 }
1681
1682 /* Handle a 64 bit reloc in a 32 bit MIPS ELF file. These are
1683 generated when addresses are 64 bits. The upper 32 bits are a simple
1684 sign extension. */
1685
1686 static bfd_reloc_status_type
1687 mips32_64bit_reloc (abfd, reloc_entry, symbol, data, input_section,
1688 output_bfd, error_message)
1689 bfd *abfd;
1690 arelent *reloc_entry;
1691 asymbol *symbol;
1692 PTR data;
1693 asection *input_section;
1694 bfd *output_bfd;
1695 char **error_message;
1696 {
1697 bfd_reloc_status_type r;
1698 arelent reloc32;
1699 unsigned long val;
1700 bfd_size_type addr;
1701
1702 r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1703 input_section, output_bfd, error_message);
1704 if (r != bfd_reloc_continue)
1705 return r;
1706
1707 /* Do a normal 32 bit relocation on the lower 32 bits. */
1708 reloc32 = *reloc_entry;
1709 if (bfd_big_endian (abfd))
1710 reloc32.address += 4;
1711 reloc32.howto = &elf_mips_howto_table[R_MIPS_32];
1712 r = bfd_perform_relocation (abfd, &reloc32, data, input_section,
1713 output_bfd, error_message);
1714
1715 /* Sign extend into the upper 32 bits. */
1716 val = bfd_get_32 (abfd, (bfd_byte *) data + reloc32.address);
1717 if ((val & 0x80000000) != 0)
1718 val = 0xffffffff;
1719 else
1720 val = 0;
1721 addr = reloc_entry->address;
1722 if (bfd_little_endian (abfd))
1723 addr += 4;
1724 bfd_put_32 (abfd, (bfd_vma) val, (bfd_byte *) data + addr);
1725
1726 return r;
1727 }
1728
1729 /* Handle a mips16 jump. */
1730
1731 static bfd_reloc_status_type
1732 mips16_jump_reloc (abfd, reloc_entry, symbol, data, input_section,
1733 output_bfd, error_message)
1734 bfd *abfd ATTRIBUTE_UNUSED;
1735 arelent *reloc_entry;
1736 asymbol *symbol;
1737 PTR data ATTRIBUTE_UNUSED;
1738 asection *input_section;
1739 bfd *output_bfd;
1740 char **error_message ATTRIBUTE_UNUSED;
1741 {
1742 if (output_bfd != (bfd *) NULL
1743 && (symbol->flags & BSF_SECTION_SYM) == 0
1744 && reloc_entry->addend == 0)
1745 {
1746 reloc_entry->address += input_section->output_offset;
1747 return bfd_reloc_ok;
1748 }
1749
1750 /* FIXME. */
1751 {
1752 static boolean warned;
1753
1754 if (! warned)
1755 (*_bfd_error_handler)
1756 (_("Linking mips16 objects into %s format is not supported"),
1757 bfd_get_target (input_section->output_section->owner));
1758 warned = true;
1759 }
1760
1761 return bfd_reloc_undefined;
1762 }
1763
1764 /* Handle a mips16 GP relative reloc. */
1765
1766 static bfd_reloc_status_type
1767 mips16_gprel_reloc (abfd, reloc_entry, symbol, data, input_section,
1768 output_bfd, error_message)
1769 bfd *abfd;
1770 arelent *reloc_entry;
1771 asymbol *symbol;
1772 PTR data;
1773 asection *input_section;
1774 bfd *output_bfd;
1775 char **error_message;
1776 {
1777 boolean relocateable;
1778 bfd_reloc_status_type ret;
1779 bfd_vma gp;
1780 unsigned short extend, insn;
1781 unsigned long final;
1782
1783 /* If we're relocating, and this is an external symbol with no
1784 addend, we don't want to change anything. We will only have an
1785 addend if this is a newly created reloc, not read from an ELF
1786 file. */
1787 if (output_bfd != NULL
1788 && (symbol->flags & BSF_SECTION_SYM) == 0
1789 && reloc_entry->addend == 0)
1790 {
1791 reloc_entry->address += input_section->output_offset;
1792 return bfd_reloc_ok;
1793 }
1794
1795 if (output_bfd != NULL)
1796 relocateable = true;
1797 else
1798 {
1799 relocateable = false;
1800 output_bfd = symbol->section->output_section->owner;
1801 }
1802
1803 ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
1804 &gp);
1805 if (ret != bfd_reloc_ok)
1806 return ret;
1807
1808 if (reloc_entry->address > input_section->_cooked_size)
1809 return bfd_reloc_outofrange;
1810
1811 /* Pick up the mips16 extend instruction and the real instruction. */
1812 extend = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address);
1813 insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address + 2);
1814
1815 /* Stuff the current addend back as a 32 bit value, do the usual
1816 relocation, and then clean up. */
1817 bfd_put_32 (abfd,
1818 (bfd_vma) (((extend & 0x1f) << 11)
1819 | (extend & 0x7e0)
1820 | (insn & 0x1f)),
1821 (bfd_byte *) data + reloc_entry->address);
1822
1823 ret = gprel16_with_gp (abfd, symbol, reloc_entry, input_section,
1824 relocateable, data, gp);
1825
1826 final = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1827 bfd_put_16 (abfd,
1828 (bfd_vma) ((extend & 0xf800)
1829 | ((final >> 11) & 0x1f)
1830 | (final & 0x7e0)),
1831 (bfd_byte *) data + reloc_entry->address);
1832 bfd_put_16 (abfd,
1833 (bfd_vma) ((insn & 0xffe0)
1834 | (final & 0x1f)),
1835 (bfd_byte *) data + reloc_entry->address + 2);
1836
1837 return ret;
1838 }
1839
1840 /* Return the ISA for a MIPS e_flags value. */
1841
1842 static INLINE int
1843 elf_mips_isa (flags)
1844 flagword flags;
1845 {
1846 switch (flags & EF_MIPS_ARCH)
1847 {
1848 case E_MIPS_ARCH_1:
1849 return 1;
1850 case E_MIPS_ARCH_2:
1851 return 2;
1852 case E_MIPS_ARCH_3:
1853 return 3;
1854 case E_MIPS_ARCH_4:
1855 return 4;
1856 case E_MIPS_ARCH_5:
1857 return 5;
1858 case E_MIPS_ARCH_32:
1859 return 32;
1860 case E_MIPS_ARCH_64:
1861 return 64;
1862 }
1863 return 4;
1864 }
1865
1866 /* Return the MACH for a MIPS e_flags value. */
1867
1868 static INLINE unsigned long
1869 elf_mips_mach (flags)
1870 flagword flags;
1871 {
1872 switch (flags & EF_MIPS_MACH)
1873 {
1874 case E_MIPS_MACH_3900:
1875 return bfd_mach_mips3900;
1876
1877 case E_MIPS_MACH_4010:
1878 return bfd_mach_mips4010;
1879
1880 case E_MIPS_MACH_4100:
1881 return bfd_mach_mips4100;
1882
1883 case E_MIPS_MACH_4111:
1884 return bfd_mach_mips4111;
1885
1886 case E_MIPS_MACH_4650:
1887 return bfd_mach_mips4650;
1888
1889 case E_MIPS_MACH_SB1:
1890 return bfd_mach_mips_sb1;
1891
1892 default:
1893 switch (flags & EF_MIPS_ARCH)
1894 {
1895 default:
1896 case E_MIPS_ARCH_1:
1897 return bfd_mach_mips3000;
1898 break;
1899
1900 case E_MIPS_ARCH_2:
1901 return bfd_mach_mips6000;
1902 break;
1903
1904 case E_MIPS_ARCH_3:
1905 return bfd_mach_mips4000;
1906 break;
1907
1908 case E_MIPS_ARCH_4:
1909 return bfd_mach_mips8000;
1910 break;
1911
1912 case E_MIPS_ARCH_5:
1913 return bfd_mach_mips5;
1914 break;
1915
1916 case E_MIPS_ARCH_32:
1917 return bfd_mach_mipsisa32;
1918 break;
1919
1920 case E_MIPS_ARCH_64:
1921 return bfd_mach_mipsisa64;
1922 break;
1923 }
1924 }
1925
1926 return 0;
1927 }
1928
1929 /* Return printable name for ABI. */
1930
1931 static INLINE char *
1932 elf_mips_abi_name (abfd)
1933 bfd *abfd;
1934 {
1935 flagword flags;
1936
1937 flags = elf_elfheader (abfd)->e_flags;
1938 switch (flags & EF_MIPS_ABI)
1939 {
1940 case 0:
1941 if (ABI_N32_P (abfd))
1942 return "N32";
1943 else if (ABI_64_P (abfd))
1944 return "64";
1945 else
1946 return "none";
1947 case E_MIPS_ABI_O32:
1948 return "O32";
1949 case E_MIPS_ABI_O64:
1950 return "O64";
1951 case E_MIPS_ABI_EABI32:
1952 return "EABI32";
1953 case E_MIPS_ABI_EABI64:
1954 return "EABI64";
1955 default:
1956 return "unknown abi";
1957 }
1958 }
1959
1960 /* A mapping from BFD reloc types to MIPS ELF reloc types. */
1961
1962 struct elf_reloc_map {
1963 bfd_reloc_code_real_type bfd_reloc_val;
1964 enum elf_mips_reloc_type elf_reloc_val;
1965 };
1966
1967 static const struct elf_reloc_map mips_reloc_map[] =
1968 {
1969 { BFD_RELOC_NONE, R_MIPS_NONE, },
1970 { BFD_RELOC_16, R_MIPS_16 },
1971 { BFD_RELOC_32, R_MIPS_32 },
1972 { BFD_RELOC_64, R_MIPS_64 },
1973 { BFD_RELOC_MIPS_JMP, R_MIPS_26 },
1974 { BFD_RELOC_HI16_S, R_MIPS_HI16 },
1975 { BFD_RELOC_LO16, R_MIPS_LO16 },
1976 { BFD_RELOC_MIPS_GPREL, R_MIPS_GPREL16 },
1977 { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL },
1978 { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 },
1979 { BFD_RELOC_16_PCREL, R_MIPS_PC16 },
1980 { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 },
1981 { BFD_RELOC_MIPS_GPREL32, R_MIPS_GPREL32 },
1982 { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 },
1983 { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 },
1984 { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 },
1985 { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 },
1986 { BFD_RELOC_MIPS_SUB, R_MIPS_SUB },
1987 { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE },
1988 { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST },
1989 { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP }
1990 };
1991
1992 /* Given a BFD reloc type, return a howto structure. */
1993
1994 static reloc_howto_type *
1995 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
1996 bfd *abfd;
1997 bfd_reloc_code_real_type code;
1998 {
1999 unsigned int i;
2000
2001 for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); i++)
2002 {
2003 if (mips_reloc_map[i].bfd_reloc_val == code)
2004 return &elf_mips_howto_table[(int) mips_reloc_map[i].elf_reloc_val];
2005 }
2006
2007 switch (code)
2008 {
2009 default:
2010 bfd_set_error (bfd_error_bad_value);
2011 return NULL;
2012
2013 case BFD_RELOC_CTOR:
2014 /* We need to handle BFD_RELOC_CTOR specially.
2015 Select the right relocation (R_MIPS_32 or R_MIPS_64) based on the
2016 size of addresses on this architecture. */
2017 if (bfd_arch_bits_per_address (abfd) == 32)
2018 return &elf_mips_howto_table[(int) R_MIPS_32];
2019 else
2020 return &elf_mips_ctor64_howto;
2021
2022 case BFD_RELOC_MIPS16_JMP:
2023 return &elf_mips16_jump_howto;
2024 case BFD_RELOC_MIPS16_GPREL:
2025 return &elf_mips16_gprel_howto;
2026 case BFD_RELOC_VTABLE_INHERIT:
2027 return &elf_mips_gnu_vtinherit_howto;
2028 case BFD_RELOC_VTABLE_ENTRY:
2029 return &elf_mips_gnu_vtentry_howto;
2030 case BFD_RELOC_PCREL_HI16_S:
2031 return &elf_mips_gnu_rel_hi16;
2032 case BFD_RELOC_PCREL_LO16:
2033 return &elf_mips_gnu_rel_lo16;
2034 case BFD_RELOC_16_PCREL_S2:
2035 return &elf_mips_gnu_rel16_s2;
2036 case BFD_RELOC_64_PCREL:
2037 return &elf_mips_gnu_pcrel64;
2038 case BFD_RELOC_32_PCREL:
2039 return &elf_mips_gnu_pcrel32;
2040 }
2041 }
2042
2043 /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */
2044
2045 static reloc_howto_type *
2046 mips_rtype_to_howto (r_type)
2047 unsigned int r_type;
2048 {
2049 switch (r_type)
2050 {
2051 case R_MIPS16_26:
2052 return &elf_mips16_jump_howto;
2053 break;
2054 case R_MIPS16_GPREL:
2055 return &elf_mips16_gprel_howto;
2056 break;
2057 case R_MIPS_GNU_VTINHERIT:
2058 return &elf_mips_gnu_vtinherit_howto;
2059 break;
2060 case R_MIPS_GNU_VTENTRY:
2061 return &elf_mips_gnu_vtentry_howto;
2062 break;
2063 case R_MIPS_GNU_REL_HI16:
2064 return &elf_mips_gnu_rel_hi16;
2065 break;
2066 case R_MIPS_GNU_REL_LO16:
2067 return &elf_mips_gnu_rel_lo16;
2068 break;
2069 case R_MIPS_GNU_REL16_S2:
2070 return &elf_mips_gnu_rel16_s2;
2071 break;
2072 case R_MIPS_PC64:
2073 return &elf_mips_gnu_pcrel64;
2074 break;
2075 case R_MIPS_PC32:
2076 return &elf_mips_gnu_pcrel32;
2077 break;
2078
2079 default:
2080 BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
2081 return &elf_mips_howto_table[r_type];
2082 break;
2083 }
2084 }
2085
2086 /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */
2087
2088 static void
2089 mips_info_to_howto_rel (abfd, cache_ptr, dst)
2090 bfd *abfd;
2091 arelent *cache_ptr;
2092 Elf32_Internal_Rel *dst;
2093 {
2094 unsigned int r_type;
2095
2096 r_type = ELF32_R_TYPE (dst->r_info);
2097 cache_ptr->howto = mips_rtype_to_howto (r_type);
2098
2099 /* The addend for a GPREL16 or LITERAL relocation comes from the GP
2100 value for the object file. We get the addend now, rather than
2101 when we do the relocation, because the symbol manipulations done
2102 by the linker may cause us to lose track of the input BFD. */
2103 if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0
2104 && (r_type == (unsigned int) R_MIPS_GPREL16
2105 || r_type == (unsigned int) R_MIPS_LITERAL))
2106 cache_ptr->addend = elf_gp (abfd);
2107 }
2108
2109 /* Given a MIPS Elf32_Internal_Rela, fill in an arelent structure. */
2110
2111 static void
2112 mips_info_to_howto_rela (abfd, cache_ptr, dst)
2113 bfd *abfd;
2114 arelent *cache_ptr;
2115 Elf32_Internal_Rela *dst;
2116 {
2117 /* Since an Elf32_Internal_Rel is an initial prefix of an
2118 Elf32_Internal_Rela, we can just use mips_info_to_howto_rel
2119 above. */
2120 mips_info_to_howto_rel (abfd, cache_ptr, (Elf32_Internal_Rel *) dst);
2121
2122 /* If we ever need to do any extra processing with dst->r_addend
2123 (the field omitted in an Elf32_Internal_Rel) we can do it here. */
2124 }
2125 \f
2126 /* A .reginfo section holds a single Elf32_RegInfo structure. These
2127 routines swap this structure in and out. They are used outside of
2128 BFD, so they are globally visible. */
2129
2130 void
2131 bfd_mips_elf32_swap_reginfo_in (abfd, ex, in)
2132 bfd *abfd;
2133 const Elf32_External_RegInfo *ex;
2134 Elf32_RegInfo *in;
2135 {
2136 in->ri_gprmask = H_GET_32 (abfd, ex->ri_gprmask);
2137 in->ri_cprmask[0] = H_GET_32 (abfd, ex->ri_cprmask[0]);
2138 in->ri_cprmask[1] = H_GET_32 (abfd, ex->ri_cprmask[1]);
2139 in->ri_cprmask[2] = H_GET_32 (abfd, ex->ri_cprmask[2]);
2140 in->ri_cprmask[3] = H_GET_32 (abfd, ex->ri_cprmask[3]);
2141 in->ri_gp_value = H_GET_32 (abfd, ex->ri_gp_value);
2142 }
2143
2144 void
2145 bfd_mips_elf32_swap_reginfo_out (abfd, in, ex)
2146 bfd *abfd;
2147 const Elf32_RegInfo *in;
2148 Elf32_External_RegInfo *ex;
2149 {
2150 H_PUT_32 (abfd, in->ri_gprmask, ex->ri_gprmask);
2151 H_PUT_32 (abfd, in->ri_cprmask[0], ex->ri_cprmask[0]);
2152 H_PUT_32 (abfd, in->ri_cprmask[1], ex->ri_cprmask[1]);
2153 H_PUT_32 (abfd, in->ri_cprmask[2], ex->ri_cprmask[2]);
2154 H_PUT_32 (abfd, in->ri_cprmask[3], ex->ri_cprmask[3]);
2155 H_PUT_32 (abfd, in->ri_gp_value, ex->ri_gp_value);
2156 }
2157
2158 /* In the 64 bit ABI, the .MIPS.options section holds register
2159 information in an Elf64_Reginfo structure. These routines swap
2160 them in and out. They are globally visible because they are used
2161 outside of BFD. These routines are here so that gas can call them
2162 without worrying about whether the 64 bit ABI has been included. */
2163
2164 void
2165 bfd_mips_elf64_swap_reginfo_in (abfd, ex, in)
2166 bfd *abfd;
2167 const Elf64_External_RegInfo *ex;
2168 Elf64_Internal_RegInfo *in;
2169 {
2170 in->ri_gprmask = H_GET_32 (abfd, ex->ri_gprmask);
2171 in->ri_pad = H_GET_32 (abfd, ex->ri_pad);
2172 in->ri_cprmask[0] = H_GET_32 (abfd, ex->ri_cprmask[0]);
2173 in->ri_cprmask[1] = H_GET_32 (abfd, ex->ri_cprmask[1]);
2174 in->ri_cprmask[2] = H_GET_32 (abfd, ex->ri_cprmask[2]);
2175 in->ri_cprmask[3] = H_GET_32 (abfd, ex->ri_cprmask[3]);
2176 in->ri_gp_value = H_GET_64 (abfd, ex->ri_gp_value);
2177 }
2178
2179 void
2180 bfd_mips_elf64_swap_reginfo_out (abfd, in, ex)
2181 bfd *abfd;
2182 const Elf64_Internal_RegInfo *in;
2183 Elf64_External_RegInfo *ex;
2184 {
2185 H_PUT_32 (abfd, in->ri_gprmask, ex->ri_gprmask);
2186 H_PUT_32 (abfd, in->ri_pad, ex->ri_pad);
2187 H_PUT_32 (abfd, in->ri_cprmask[0], ex->ri_cprmask[0]);
2188 H_PUT_32 (abfd, in->ri_cprmask[1], ex->ri_cprmask[1]);
2189 H_PUT_32 (abfd, in->ri_cprmask[2], ex->ri_cprmask[2]);
2190 H_PUT_32 (abfd, in->ri_cprmask[3], ex->ri_cprmask[3]);
2191 H_PUT_64 (abfd, in->ri_gp_value, ex->ri_gp_value);
2192 }
2193
2194 /* Swap an entry in a .gptab section. Note that these routines rely
2195 on the equivalence of the two elements of the union. */
2196
2197 static void
2198 bfd_mips_elf32_swap_gptab_in (abfd, ex, in)
2199 bfd *abfd;
2200 const Elf32_External_gptab *ex;
2201 Elf32_gptab *in;
2202 {
2203 in->gt_entry.gt_g_value = H_GET_32 (abfd, ex->gt_entry.gt_g_value);
2204 in->gt_entry.gt_bytes = H_GET_32 (abfd, ex->gt_entry.gt_bytes);
2205 }
2206
2207 static void
2208 bfd_mips_elf32_swap_gptab_out (abfd, in, ex)
2209 bfd *abfd;
2210 const Elf32_gptab *in;
2211 Elf32_External_gptab *ex;
2212 {
2213 H_PUT_32 (abfd, in->gt_entry.gt_g_value, ex->gt_entry.gt_g_value);
2214 H_PUT_32 (abfd, in->gt_entry.gt_bytes, ex->gt_entry.gt_bytes);
2215 }
2216
2217 static void
2218 bfd_elf32_swap_compact_rel_out (abfd, in, ex)
2219 bfd *abfd;
2220 const Elf32_compact_rel *in;
2221 Elf32_External_compact_rel *ex;
2222 {
2223 H_PUT_32 (abfd, in->id1, ex->id1);
2224 H_PUT_32 (abfd, in->num, ex->num);
2225 H_PUT_32 (abfd, in->id2, ex->id2);
2226 H_PUT_32 (abfd, in->offset, ex->offset);
2227 H_PUT_32 (abfd, in->reserved0, ex->reserved0);
2228 H_PUT_32 (abfd, in->reserved1, ex->reserved1);
2229 }
2230
2231 static void
2232 bfd_elf32_swap_crinfo_out (abfd, in, ex)
2233 bfd *abfd;
2234 const Elf32_crinfo *in;
2235 Elf32_External_crinfo *ex;
2236 {
2237 unsigned long l;
2238
2239 l = (((in->ctype & CRINFO_CTYPE) << CRINFO_CTYPE_SH)
2240 | ((in->rtype & CRINFO_RTYPE) << CRINFO_RTYPE_SH)
2241 | ((in->dist2to & CRINFO_DIST2TO) << CRINFO_DIST2TO_SH)
2242 | ((in->relvaddr & CRINFO_RELVADDR) << CRINFO_RELVADDR_SH));
2243 H_PUT_32 (abfd, l, ex->info);
2244 H_PUT_32 (abfd, in->konst, ex->konst);
2245 H_PUT_32 (abfd, in->vaddr, ex->vaddr);
2246 }
2247
2248 /* Swap in an options header. */
2249
2250 void
2251 bfd_mips_elf_swap_options_in (abfd, ex, in)
2252 bfd *abfd;
2253 const Elf_External_Options *ex;
2254 Elf_Internal_Options *in;
2255 {
2256 in->kind = H_GET_8 (abfd, ex->kind);
2257 in->size = H_GET_8 (abfd, ex->size);
2258 in->section = H_GET_16 (abfd, ex->section);
2259 in->info = H_GET_32 (abfd, ex->info);
2260 }
2261
2262 /* Swap out an options header. */
2263
2264 void
2265 bfd_mips_elf_swap_options_out (abfd, in, ex)
2266 bfd *abfd;
2267 const Elf_Internal_Options *in;
2268 Elf_External_Options *ex;
2269 {
2270 H_PUT_8 (abfd, in->kind, ex->kind);
2271 H_PUT_8 (abfd, in->size, ex->size);
2272 H_PUT_16 (abfd, in->section, ex->section);
2273 H_PUT_32 (abfd, in->info, ex->info);
2274 }
2275 #if 0
2276 /* Swap in an MSYM entry. */
2277
2278 static void
2279 bfd_mips_elf_swap_msym_in (abfd, ex, in)
2280 bfd *abfd;
2281 const Elf32_External_Msym *ex;
2282 Elf32_Internal_Msym *in;
2283 {
2284 in->ms_hash_value = H_GET_32 (abfd, ex->ms_hash_value);
2285 in->ms_info = H_GET_32 (abfd, ex->ms_info);
2286 }
2287 #endif
2288 /* Swap out an MSYM entry. */
2289
2290 static void
2291 bfd_mips_elf_swap_msym_out (abfd, in, ex)
2292 bfd *abfd;
2293 const Elf32_Internal_Msym *in;
2294 Elf32_External_Msym *ex;
2295 {
2296 H_PUT_32 (abfd, in->ms_hash_value, ex->ms_hash_value);
2297 H_PUT_32 (abfd, in->ms_info, ex->ms_info);
2298 }
2299 \f
2300 /* Determine whether a symbol is global for the purposes of splitting
2301 the symbol table into global symbols and local symbols. At least
2302 on Irix 5, this split must be between section symbols and all other
2303 symbols. On most ELF targets the split is between static symbols
2304 and externally visible symbols. */
2305
2306 static boolean
2307 mips_elf_sym_is_global (abfd, sym)
2308 bfd *abfd ATTRIBUTE_UNUSED;
2309 asymbol *sym;
2310 {
2311 if (SGI_COMPAT (abfd))
2312 return (sym->flags & BSF_SECTION_SYM) == 0;
2313 else
2314 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
2315 || bfd_is_und_section (bfd_get_section (sym))
2316 || bfd_is_com_section (bfd_get_section (sym)));
2317 }
2318 \f
2319 /* Set the right machine number for a MIPS ELF file. This is used for
2320 both the 32-bit and the 64-bit ABI. */
2321
2322 boolean
2323 _bfd_mips_elf_object_p (abfd)
2324 bfd *abfd;
2325 {
2326 /* Irix 5 and 6 is broken. Object file symbol tables are not always
2327 sorted correctly such that local symbols precede global symbols,
2328 and the sh_info field in the symbol table is not always right. */
2329 if (SGI_COMPAT(abfd))
2330 elf_bad_symtab (abfd) = true;
2331
2332 bfd_default_set_arch_mach (abfd, bfd_arch_mips,
2333 elf_mips_mach (elf_elfheader (abfd)->e_flags));
2334 return true;
2335 }
2336
2337 /* The final processing done just before writing out a MIPS ELF object
2338 file. This gets the MIPS architecture right based on the machine
2339 number. This is used by both the 32-bit and the 64-bit ABI. */
2340
2341 void
2342 _bfd_mips_elf_final_write_processing (abfd, linker)
2343 bfd *abfd;
2344 boolean linker ATTRIBUTE_UNUSED;
2345 {
2346 unsigned long val;
2347 unsigned int i;
2348 Elf_Internal_Shdr **hdrpp;
2349 const char *name;
2350 asection *sec;
2351
2352 switch (bfd_get_mach (abfd))
2353 {
2354 default:
2355 case bfd_mach_mips3000:
2356 val = E_MIPS_ARCH_1;
2357 break;
2358
2359 case bfd_mach_mips3900:
2360 val = E_MIPS_ARCH_1 | E_MIPS_MACH_3900;
2361 break;
2362
2363 case bfd_mach_mips6000:
2364 val = E_MIPS_ARCH_2;
2365 break;
2366
2367 case bfd_mach_mips4000:
2368 case bfd_mach_mips4300:
2369 case bfd_mach_mips4400:
2370 case bfd_mach_mips4600:
2371 val = E_MIPS_ARCH_3;
2372 break;
2373
2374 case bfd_mach_mips4010:
2375 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4010;
2376 break;
2377
2378 case bfd_mach_mips4100:
2379 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4100;
2380 break;
2381
2382 case bfd_mach_mips4111:
2383 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4111;
2384 break;
2385
2386 case bfd_mach_mips4650:
2387 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4650;
2388 break;
2389
2390 case bfd_mach_mips5000:
2391 case bfd_mach_mips8000:
2392 case bfd_mach_mips10000:
2393 case bfd_mach_mips12000:
2394 val = E_MIPS_ARCH_4;
2395 break;
2396
2397 case bfd_mach_mips5:
2398 val = E_MIPS_ARCH_5;
2399 break;
2400
2401 case bfd_mach_mips_sb1:
2402 val = E_MIPS_ARCH_64 | E_MIPS_MACH_SB1;
2403 break;
2404
2405 case bfd_mach_mipsisa32:
2406 val = E_MIPS_ARCH_32;
2407 break;
2408
2409 case bfd_mach_mipsisa64:
2410 val = E_MIPS_ARCH_64;
2411 }
2412
2413 elf_elfheader (abfd)->e_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH);
2414 elf_elfheader (abfd)->e_flags |= val;
2415
2416 /* Set the sh_info field for .gptab sections and other appropriate
2417 info for each special section. */
2418 for (i = 1, hdrpp = elf_elfsections (abfd) + 1;
2419 i < elf_elfheader (abfd)->e_shnum;
2420 i++, hdrpp++)
2421 {
2422 switch ((*hdrpp)->sh_type)
2423 {
2424 case SHT_MIPS_MSYM:
2425 case SHT_MIPS_LIBLIST:
2426 sec = bfd_get_section_by_name (abfd, ".dynstr");
2427 if (sec != NULL)
2428 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
2429 break;
2430
2431 case SHT_MIPS_GPTAB:
2432 BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
2433 name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
2434 BFD_ASSERT (name != NULL
2435 && strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0);
2436 sec = bfd_get_section_by_name (abfd, name + sizeof ".gptab" - 1);
2437 BFD_ASSERT (sec != NULL);
2438 (*hdrpp)->sh_info = elf_section_data (sec)->this_idx;
2439 break;
2440
2441 case SHT_MIPS_CONTENT:
2442 BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
2443 name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
2444 BFD_ASSERT (name != NULL
2445 && strncmp (name, ".MIPS.content",
2446 sizeof ".MIPS.content" - 1) == 0);
2447 sec = bfd_get_section_by_name (abfd,
2448 name + sizeof ".MIPS.content" - 1);
2449 BFD_ASSERT (sec != NULL);
2450 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
2451 break;
2452
2453 case SHT_MIPS_SYMBOL_LIB:
2454 sec = bfd_get_section_by_name (abfd, ".dynsym");
2455 if (sec != NULL)
2456 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
2457 sec = bfd_get_section_by_name (abfd, ".liblist");
2458 if (sec != NULL)
2459 (*hdrpp)->sh_info = elf_section_data (sec)->this_idx;
2460 break;
2461
2462 case SHT_MIPS_EVENTS:
2463 BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
2464 name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
2465 BFD_ASSERT (name != NULL);
2466 if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) == 0)
2467 sec = bfd_get_section_by_name (abfd,
2468 name + sizeof ".MIPS.events" - 1);
2469 else
2470 {
2471 BFD_ASSERT (strncmp (name, ".MIPS.post_rel",
2472 sizeof ".MIPS.post_rel" - 1) == 0);
2473 sec = bfd_get_section_by_name (abfd,
2474 (name
2475 + sizeof ".MIPS.post_rel" - 1));
2476 }
2477 BFD_ASSERT (sec != NULL);
2478 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
2479 break;
2480
2481 }
2482 }
2483 }
2484 \f
2485 /* Function to keep MIPS specific file flags like as EF_MIPS_PIC. */
2486
2487 boolean
2488 _bfd_mips_elf_set_private_flags (abfd, flags)
2489 bfd *abfd;
2490 flagword flags;
2491 {
2492 BFD_ASSERT (!elf_flags_init (abfd)
2493 || elf_elfheader (abfd)->e_flags == flags);
2494
2495 elf_elfheader (abfd)->e_flags = flags;
2496 elf_flags_init (abfd) = true;
2497 return true;
2498 }
2499
2500 /* Copy backend specific data from one object module to another */
2501
2502 boolean
2503 _bfd_mips_elf_copy_private_bfd_data (ibfd, obfd)
2504 bfd *ibfd;
2505 bfd *obfd;
2506 {
2507 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2508 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2509 return true;
2510
2511 BFD_ASSERT (!elf_flags_init (obfd)
2512 || (elf_elfheader (obfd)->e_flags
2513 == elf_elfheader (ibfd)->e_flags));
2514
2515 elf_gp (obfd) = elf_gp (ibfd);
2516 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
2517 elf_flags_init (obfd) = true;
2518 return true;
2519 }
2520
2521 /* Merge backend specific data from an object file to the output
2522 object file when linking. */
2523
2524 boolean
2525 _bfd_mips_elf_merge_private_bfd_data (ibfd, obfd)
2526 bfd *ibfd;
2527 bfd *obfd;
2528 {
2529 flagword old_flags;
2530 flagword new_flags;
2531 boolean ok;
2532 boolean null_input_bfd = true;
2533 asection *sec;
2534
2535 /* Check if we have the same endianess */
2536 if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
2537 return false;
2538
2539 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2540 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2541 return true;
2542
2543 new_flags = elf_elfheader (ibfd)->e_flags;
2544 elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_NOREORDER;
2545 old_flags = elf_elfheader (obfd)->e_flags;
2546
2547 if (! elf_flags_init (obfd))
2548 {
2549 elf_flags_init (obfd) = true;
2550 elf_elfheader (obfd)->e_flags = new_flags;
2551 elf_elfheader (obfd)->e_ident[EI_CLASS]
2552 = elf_elfheader (ibfd)->e_ident[EI_CLASS];
2553
2554 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2555 && bfd_get_arch_info (obfd)->the_default)
2556 {
2557 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
2558 bfd_get_mach (ibfd)))
2559 return false;
2560 }
2561
2562 return true;
2563 }
2564
2565 /* Check flag compatibility. */
2566
2567 new_flags &= ~EF_MIPS_NOREORDER;
2568 old_flags &= ~EF_MIPS_NOREORDER;
2569
2570 if (new_flags == old_flags)
2571 return true;
2572
2573 /* Check to see if the input BFD actually contains any sections.
2574 If not, its flags may not have been initialised either, but it cannot
2575 actually cause any incompatibility. */
2576 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
2577 {
2578 /* Ignore synthetic sections and empty .text, .data and .bss sections
2579 which are automatically generated by gas. */
2580 if (strcmp (sec->name, ".reginfo")
2581 && strcmp (sec->name, ".mdebug")
2582 && ((!strcmp (sec->name, ".text")
2583 || !strcmp (sec->name, ".data")
2584 || !strcmp (sec->name, ".bss"))
2585 && sec->_raw_size != 0))
2586 {
2587 null_input_bfd = false;
2588 break;
2589 }
2590 }
2591 if (null_input_bfd)
2592 return true;
2593
2594 ok = true;
2595
2596 if ((new_flags & EF_MIPS_PIC) != (old_flags & EF_MIPS_PIC))
2597 {
2598 new_flags &= ~EF_MIPS_PIC;
2599 old_flags &= ~EF_MIPS_PIC;
2600 (*_bfd_error_handler)
2601 (_("%s: linking PIC files with non-PIC files"),
2602 bfd_archive_filename (ibfd));
2603 ok = false;
2604 }
2605
2606 if ((new_flags & EF_MIPS_CPIC) != (old_flags & EF_MIPS_CPIC))
2607 {
2608 new_flags &= ~EF_MIPS_CPIC;
2609 old_flags &= ~EF_MIPS_CPIC;
2610 (*_bfd_error_handler)
2611 (_("%s: linking abicalls files with non-abicalls files"),
2612 bfd_archive_filename (ibfd));
2613 ok = false;
2614 }
2615
2616 /* Compare the ISA's. */
2617 if ((new_flags & (EF_MIPS_ARCH | EF_MIPS_MACH))
2618 != (old_flags & (EF_MIPS_ARCH | EF_MIPS_MACH)))
2619 {
2620 int new_mach = new_flags & EF_MIPS_MACH;
2621 int old_mach = old_flags & EF_MIPS_MACH;
2622 int new_isa = elf_mips_isa (new_flags);
2623 int old_isa = elf_mips_isa (old_flags);
2624
2625 /* If either has no machine specified, just compare the general isa's.
2626 Some combinations of machines are ok, if the isa's match. */
2627 if (! new_mach
2628 || ! old_mach
2629 || new_mach == old_mach
2630 )
2631 {
2632 /* Don't warn about mixing code using 32-bit ISAs, or mixing code
2633 using 64-bit ISAs. They will normally use the same data sizes
2634 and calling conventions. */
2635
2636 if (( (new_isa == 1 || new_isa == 2 || new_isa == 32)
2637 ^ (old_isa == 1 || old_isa == 2 || old_isa == 32)) != 0)
2638 {
2639 (*_bfd_error_handler)
2640 (_("%s: ISA mismatch (-mips%d) with previous modules (-mips%d)"),
2641 bfd_archive_filename (ibfd), new_isa, old_isa);
2642 ok = false;
2643 }
2644 }
2645
2646 else
2647 {
2648 (*_bfd_error_handler)
2649 (_("%s: ISA mismatch (%d) with previous modules (%d)"),
2650 bfd_archive_filename (ibfd),
2651 elf_mips_mach (new_flags),
2652 elf_mips_mach (old_flags));
2653 ok = false;
2654 }
2655
2656 new_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH);
2657 old_flags &= ~(EF_MIPS_ARCH | EF_MIPS_MACH);
2658 }
2659
2660 /* Compare ABI's. The 64-bit ABI does not use EF_MIPS_ABI. But, it
2661 does set EI_CLASS differently from any 32-bit ABI. */
2662 if ((new_flags & EF_MIPS_ABI) != (old_flags & EF_MIPS_ABI)
2663 || (elf_elfheader (ibfd)->e_ident[EI_CLASS]
2664 != elf_elfheader (obfd)->e_ident[EI_CLASS]))
2665 {
2666 /* Only error if both are set (to different values). */
2667 if (((new_flags & EF_MIPS_ABI) && (old_flags & EF_MIPS_ABI))
2668 || (elf_elfheader (ibfd)->e_ident[EI_CLASS]
2669 != elf_elfheader (obfd)->e_ident[EI_CLASS]))
2670 {
2671 (*_bfd_error_handler)
2672 (_("%s: ABI mismatch: linking %s module with previous %s modules"),
2673 bfd_archive_filename (ibfd),
2674 elf_mips_abi_name (ibfd),
2675 elf_mips_abi_name (obfd));
2676 ok = false;
2677 }
2678 new_flags &= ~EF_MIPS_ABI;
2679 old_flags &= ~EF_MIPS_ABI;
2680 }
2681
2682 /* Warn about any other mismatches */
2683 if (new_flags != old_flags)
2684 {
2685 (*_bfd_error_handler)
2686 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
2687 bfd_archive_filename (ibfd), (unsigned long) new_flags,
2688 (unsigned long) old_flags);
2689 ok = false;
2690 }
2691
2692 if (! ok)
2693 {
2694 bfd_set_error (bfd_error_bad_value);
2695 return false;
2696 }
2697
2698 return true;
2699 }
2700 \f
2701 boolean
2702 _bfd_mips_elf_print_private_bfd_data (abfd, ptr)
2703 bfd *abfd;
2704 PTR ptr;
2705 {
2706 FILE *file = (FILE *) ptr;
2707
2708 BFD_ASSERT (abfd != NULL && ptr != NULL);
2709
2710 /* Print normal ELF private data. */
2711 _bfd_elf_print_private_bfd_data (abfd, ptr);
2712
2713 /* xgettext:c-format */
2714 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
2715
2716 if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O32)
2717 fprintf (file, _(" [abi=O32]"));
2718 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O64)
2719 fprintf (file, _(" [abi=O64]"));
2720 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI32)
2721 fprintf (file, _(" [abi=EABI32]"));
2722 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI64)
2723 fprintf (file, _(" [abi=EABI64]"));
2724 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI))
2725 fprintf (file, _(" [abi unknown]"));
2726 else if (ABI_N32_P (abfd))
2727 fprintf (file, _(" [abi=N32]"));
2728 else if (ABI_64_P (abfd))
2729 fprintf (file, _(" [abi=64]"));
2730 else
2731 fprintf (file, _(" [no abi set]"));
2732
2733 if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_1)
2734 fprintf (file, _(" [mips1]"));
2735 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_2)
2736 fprintf (file, _(" [mips2]"));
2737 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_3)
2738 fprintf (file, _(" [mips3]"));
2739 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_4)
2740 fprintf (file, _(" [mips4]"));
2741 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_5)
2742 fprintf (file, _ (" [mips5]"));
2743 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_32)
2744 fprintf (file, _ (" [mips32]"));
2745 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_64)
2746 fprintf (file, _ (" [mips64]"));
2747 else
2748 fprintf (file, _(" [unknown ISA]"));
2749
2750 if (elf_elfheader (abfd)->e_flags & EF_MIPS_32BITMODE)
2751 fprintf (file, _(" [32bitmode]"));
2752 else
2753 fprintf (file, _(" [not 32bitmode]"));
2754
2755 fputc ('\n', file);
2756
2757 return true;
2758 }
2759 \f
2760 /* Handle a MIPS specific section when reading an object file. This
2761 is called when elfcode.h finds a section with an unknown type.
2762 This routine supports both the 32-bit and 64-bit ELF ABI.
2763
2764 FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure
2765 how to. */
2766
2767 boolean
2768 _bfd_mips_elf_section_from_shdr (abfd, hdr, name)
2769 bfd *abfd;
2770 Elf_Internal_Shdr *hdr;
2771 char *name;
2772 {
2773 flagword flags = 0;
2774
2775 /* There ought to be a place to keep ELF backend specific flags, but
2776 at the moment there isn't one. We just keep track of the
2777 sections by their name, instead. Fortunately, the ABI gives
2778 suggested names for all the MIPS specific sections, so we will
2779 probably get away with this. */
2780 switch (hdr->sh_type)
2781 {
2782 case SHT_MIPS_LIBLIST:
2783 if (strcmp (name, ".liblist") != 0)
2784 return false;
2785 break;
2786 case SHT_MIPS_MSYM:
2787 if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (abfd)) != 0)
2788 return false;
2789 break;
2790 case SHT_MIPS_CONFLICT:
2791 if (strcmp (name, ".conflict") != 0)
2792 return false;
2793 break;
2794 case SHT_MIPS_GPTAB:
2795 if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) != 0)
2796 return false;
2797 break;
2798 case SHT_MIPS_UCODE:
2799 if (strcmp (name, ".ucode") != 0)
2800 return false;
2801 break;
2802 case SHT_MIPS_DEBUG:
2803 if (strcmp (name, ".mdebug") != 0)
2804 return false;
2805 flags = SEC_DEBUGGING;
2806 break;
2807 case SHT_MIPS_REGINFO:
2808 if (strcmp (name, ".reginfo") != 0
2809 || hdr->sh_size != sizeof (Elf32_External_RegInfo))
2810 return false;
2811 flags = (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_SIZE);
2812 break;
2813 case SHT_MIPS_IFACE:
2814 if (strcmp (name, ".MIPS.interfaces") != 0)
2815 return false;
2816 break;
2817 case SHT_MIPS_CONTENT:
2818 if (strncmp (name, ".MIPS.content", sizeof ".MIPS.content" - 1) != 0)
2819 return false;
2820 break;
2821 case SHT_MIPS_OPTIONS:
2822 if (strcmp (name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) != 0)
2823 return false;
2824 break;
2825 case SHT_MIPS_DWARF:
2826 if (strncmp (name, ".debug_", sizeof ".debug_" - 1) != 0)
2827 return false;
2828 break;
2829 case SHT_MIPS_SYMBOL_LIB:
2830 if (strcmp (name, ".MIPS.symlib") != 0)
2831 return false;
2832 break;
2833 case SHT_MIPS_EVENTS:
2834 if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) != 0
2835 && strncmp (name, ".MIPS.post_rel",
2836 sizeof ".MIPS.post_rel" - 1) != 0)
2837 return false;
2838 break;
2839 default:
2840 return false;
2841 }
2842
2843 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2844 return false;
2845
2846 if (flags)
2847 {
2848 if (! bfd_set_section_flags (abfd, hdr->bfd_section,
2849 (bfd_get_section_flags (abfd,
2850 hdr->bfd_section)
2851 | flags)))
2852 return false;
2853 }
2854
2855 /* FIXME: We should record sh_info for a .gptab section. */
2856
2857 /* For a .reginfo section, set the gp value in the tdata information
2858 from the contents of this section. We need the gp value while
2859 processing relocs, so we just get it now. The .reginfo section
2860 is not used in the 64-bit MIPS ELF ABI. */
2861 if (hdr->sh_type == SHT_MIPS_REGINFO)
2862 {
2863 Elf32_External_RegInfo ext;
2864 Elf32_RegInfo s;
2865
2866 if (! bfd_get_section_contents (abfd, hdr->bfd_section, (PTR) &ext,
2867 (file_ptr) 0,
2868 (bfd_size_type) sizeof ext))
2869 return false;
2870 bfd_mips_elf32_swap_reginfo_in (abfd, &ext, &s);
2871 elf_gp (abfd) = s.ri_gp_value;
2872 }
2873
2874 /* For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and
2875 set the gp value based on what we find. We may see both
2876 SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case,
2877 they should agree. */
2878 if (hdr->sh_type == SHT_MIPS_OPTIONS)
2879 {
2880 bfd_byte *contents, *l, *lend;
2881
2882 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
2883 if (contents == NULL)
2884 return false;
2885 if (! bfd_get_section_contents (abfd, hdr->bfd_section, contents,
2886 (file_ptr) 0, hdr->sh_size))
2887 {
2888 free (contents);
2889 return false;
2890 }
2891 l = contents;
2892 lend = contents + hdr->sh_size;
2893 while (l + sizeof (Elf_External_Options) <= lend)
2894 {
2895 Elf_Internal_Options intopt;
2896
2897 bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l,
2898 &intopt);
2899 if (ABI_64_P (abfd) && intopt.kind == ODK_REGINFO)
2900 {
2901 Elf64_Internal_RegInfo intreg;
2902
2903 bfd_mips_elf64_swap_reginfo_in
2904 (abfd,
2905 ((Elf64_External_RegInfo *)
2906 (l + sizeof (Elf_External_Options))),
2907 &intreg);
2908 elf_gp (abfd) = intreg.ri_gp_value;
2909 }
2910 else if (intopt.kind == ODK_REGINFO)
2911 {
2912 Elf32_RegInfo intreg;
2913
2914 bfd_mips_elf32_swap_reginfo_in
2915 (abfd,
2916 ((Elf32_External_RegInfo *)
2917 (l + sizeof (Elf_External_Options))),
2918 &intreg);
2919 elf_gp (abfd) = intreg.ri_gp_value;
2920 }
2921 l += intopt.size;
2922 }
2923 free (contents);
2924 }
2925
2926 return true;
2927 }
2928
2929 /* Set the correct type for a MIPS ELF section. We do this by the
2930 section name, which is a hack, but ought to work. This routine is
2931 used by both the 32-bit and the 64-bit ABI. */
2932
2933 boolean
2934 _bfd_mips_elf_fake_sections (abfd, hdr, sec)
2935 bfd *abfd;
2936 Elf32_Internal_Shdr *hdr;
2937 asection *sec;
2938 {
2939 register const char *name;
2940
2941 name = bfd_get_section_name (abfd, sec);
2942
2943 if (strcmp (name, ".liblist") == 0)
2944 {
2945 hdr->sh_type = SHT_MIPS_LIBLIST;
2946 hdr->sh_info = sec->_raw_size / sizeof (Elf32_Lib);
2947 /* The sh_link field is set in final_write_processing. */
2948 }
2949 else if (strcmp (name, ".conflict") == 0)
2950 hdr->sh_type = SHT_MIPS_CONFLICT;
2951 else if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0)
2952 {
2953 hdr->sh_type = SHT_MIPS_GPTAB;
2954 hdr->sh_entsize = sizeof (Elf32_External_gptab);
2955 /* The sh_info field is set in final_write_processing. */
2956 }
2957 else if (strcmp (name, ".ucode") == 0)
2958 hdr->sh_type = SHT_MIPS_UCODE;
2959 else if (strcmp (name, ".mdebug") == 0)
2960 {
2961 hdr->sh_type = SHT_MIPS_DEBUG;
2962 /* In a shared object on Irix 5.3, the .mdebug section has an
2963 entsize of 0. FIXME: Does this matter? */
2964 if (SGI_COMPAT (abfd) && (abfd->flags & DYNAMIC) != 0)
2965 hdr->sh_entsize = 0;
2966 else
2967 hdr->sh_entsize = 1;
2968 }
2969 else if (strcmp (name, ".reginfo") == 0)
2970 {
2971 hdr->sh_type = SHT_MIPS_REGINFO;
2972 /* In a shared object on Irix 5.3, the .reginfo section has an
2973 entsize of 0x18. FIXME: Does this matter? */
2974 if (SGI_COMPAT (abfd))
2975 {
2976 if ((abfd->flags & DYNAMIC) != 0)
2977 hdr->sh_entsize = sizeof (Elf32_External_RegInfo);
2978 else
2979 hdr->sh_entsize = 1;
2980 }
2981 else
2982 hdr->sh_entsize = sizeof (Elf32_External_RegInfo);
2983 }
2984 else if (SGI_COMPAT (abfd)
2985 && (strcmp (name, ".hash") == 0
2986 || strcmp (name, ".dynamic") == 0
2987 || strcmp (name, ".dynstr") == 0))
2988 {
2989 if (SGI_COMPAT (abfd))
2990 hdr->sh_entsize = 0;
2991 #if 0
2992 /* This isn't how the Irix 6 linker behaves. */
2993 hdr->sh_info = SIZEOF_MIPS_DYNSYM_SECNAMES;
2994 #endif
2995 }
2996 else if (strcmp (name, ".got") == 0
2997 || strcmp (name, MIPS_ELF_SRDATA_SECTION_NAME (abfd)) == 0
2998 || strcmp (name, ".sdata") == 0
2999 || strcmp (name, ".sbss") == 0
3000 || strcmp (name, ".lit4") == 0
3001 || strcmp (name, ".lit8") == 0)
3002 hdr->sh_flags |= SHF_MIPS_GPREL;
3003 else if (strcmp (name, ".MIPS.interfaces") == 0)
3004 {
3005 hdr->sh_type = SHT_MIPS_IFACE;
3006 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
3007 }
3008 else if (strncmp (name, ".MIPS.content", strlen (".MIPS.content")) == 0)
3009 {
3010 hdr->sh_type = SHT_MIPS_CONTENT;
3011 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
3012 /* The sh_info field is set in final_write_processing. */
3013 }
3014 else if (strcmp (name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0)
3015 {
3016 hdr->sh_type = SHT_MIPS_OPTIONS;
3017 hdr->sh_entsize = 1;
3018 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
3019 }
3020 else if (strncmp (name, ".debug_", sizeof ".debug_" - 1) == 0)
3021 hdr->sh_type = SHT_MIPS_DWARF;
3022 else if (strcmp (name, ".MIPS.symlib") == 0)
3023 {
3024 hdr->sh_type = SHT_MIPS_SYMBOL_LIB;
3025 /* The sh_link and sh_info fields are set in
3026 final_write_processing. */
3027 }
3028 else if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) == 0
3029 || strncmp (name, ".MIPS.post_rel",
3030 sizeof ".MIPS.post_rel" - 1) == 0)
3031 {
3032 hdr->sh_type = SHT_MIPS_EVENTS;
3033 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
3034 /* The sh_link field is set in final_write_processing. */
3035 }
3036 else if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (abfd)) == 0)
3037 {
3038 hdr->sh_type = SHT_MIPS_MSYM;
3039 hdr->sh_flags |= SHF_ALLOC;
3040 hdr->sh_entsize = 8;
3041 }
3042
3043 /* The generic elf_fake_sections will set up REL_HDR using the
3044 default kind of relocations. But, we may actually need both
3045 kinds of relocations, so we set up the second header here. */
3046 if ((sec->flags & SEC_RELOC) != 0)
3047 {
3048 struct bfd_elf_section_data *esd;
3049 bfd_size_type amt = sizeof (Elf_Internal_Shdr);
3050
3051 esd = elf_section_data (sec);
3052 BFD_ASSERT (esd->rel_hdr2 == NULL);
3053 esd->rel_hdr2 = (Elf_Internal_Shdr *) bfd_zalloc (abfd, amt);
3054 if (!esd->rel_hdr2)
3055 return false;
3056 _bfd_elf_init_reloc_shdr (abfd, esd->rel_hdr2, sec,
3057 !elf_section_data (sec)->use_rela_p);
3058 }
3059
3060 return true;
3061 }
3062
3063 /* Given a BFD section, try to locate the corresponding ELF section
3064 index. This is used by both the 32-bit and the 64-bit ABI.
3065 Actually, it's not clear to me that the 64-bit ABI supports these,
3066 but for non-PIC objects we will certainly want support for at least
3067 the .scommon section. */
3068
3069 boolean
3070 _bfd_mips_elf_section_from_bfd_section (abfd, hdr, sec, retval)
3071 bfd *abfd ATTRIBUTE_UNUSED;
3072 Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED;
3073 asection *sec;
3074 int *retval;
3075 {
3076 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
3077 {
3078 *retval = SHN_MIPS_SCOMMON;
3079 return true;
3080 }
3081 if (strcmp (bfd_get_section_name (abfd, sec), ".acommon") == 0)
3082 {
3083 *retval = SHN_MIPS_ACOMMON;
3084 return true;
3085 }
3086 return false;
3087 }
3088
3089 /* When are writing out the .options or .MIPS.options section,
3090 remember the bytes we are writing out, so that we can install the
3091 GP value in the section_processing routine. */
3092
3093 boolean
3094 _bfd_mips_elf_set_section_contents (abfd, section, location, offset, count)
3095 bfd *abfd;
3096 sec_ptr section;
3097 PTR location;
3098 file_ptr offset;
3099 bfd_size_type count;
3100 {
3101 if (strcmp (section->name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0)
3102 {
3103 bfd_byte *c;
3104
3105 if (elf_section_data (section) == NULL)
3106 {
3107 bfd_size_type amt = sizeof (struct bfd_elf_section_data);
3108 section->used_by_bfd = (PTR) bfd_zalloc (abfd, amt);
3109 if (elf_section_data (section) == NULL)
3110 return false;
3111 }
3112 c = (bfd_byte *) elf_section_data (section)->tdata;
3113 if (c == NULL)
3114 {
3115 bfd_size_type size;
3116
3117 if (section->_cooked_size != 0)
3118 size = section->_cooked_size;
3119 else
3120 size = section->_raw_size;
3121 c = (bfd_byte *) bfd_zalloc (abfd, size);
3122 if (c == NULL)
3123 return false;
3124 elf_section_data (section)->tdata = (PTR) c;
3125 }
3126
3127 memcpy (c + offset, location, (size_t) count);
3128 }
3129
3130 return _bfd_elf_set_section_contents (abfd, section, location, offset,
3131 count);
3132 }
3133
3134 /* Work over a section just before writing it out. This routine is
3135 used by both the 32-bit and the 64-bit ABI. FIXME: We recognize
3136 sections that need the SHF_MIPS_GPREL flag by name; there has to be
3137 a better way. */
3138
3139 boolean
3140 _bfd_mips_elf_section_processing (abfd, hdr)
3141 bfd *abfd;
3142 Elf_Internal_Shdr *hdr;
3143 {
3144 if (hdr->sh_type == SHT_MIPS_REGINFO
3145 && hdr->sh_size > 0)
3146 {
3147 bfd_byte buf[4];
3148
3149 BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo));
3150 BFD_ASSERT (hdr->contents == NULL);
3151
3152 if (bfd_seek (abfd,
3153 hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4,
3154 SEEK_SET) != 0)
3155 return false;
3156 H_PUT_32 (abfd, elf_gp (abfd), buf);
3157 if (bfd_bwrite (buf, (bfd_size_type) 4, abfd) != 4)
3158 return false;
3159 }
3160
3161 if (hdr->sh_type == SHT_MIPS_OPTIONS
3162 && hdr->bfd_section != NULL
3163 && elf_section_data (hdr->bfd_section) != NULL
3164 && elf_section_data (hdr->bfd_section)->tdata != NULL)
3165 {
3166 bfd_byte *contents, *l, *lend;
3167
3168 /* We stored the section contents in the elf_section_data tdata
3169 field in the set_section_contents routine. We save the
3170 section contents so that we don't have to read them again.
3171 At this point we know that elf_gp is set, so we can look
3172 through the section contents to see if there is an
3173 ODK_REGINFO structure. */
3174
3175 contents = (bfd_byte *) elf_section_data (hdr->bfd_section)->tdata;
3176 l = contents;
3177 lend = contents + hdr->sh_size;
3178 while (l + sizeof (Elf_External_Options) <= lend)
3179 {
3180 Elf_Internal_Options intopt;
3181
3182 bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l,
3183 &intopt);
3184 if (ABI_64_P (abfd) && intopt.kind == ODK_REGINFO)
3185 {
3186 bfd_byte buf[8];
3187
3188 if (bfd_seek (abfd,
3189 (hdr->sh_offset
3190 + (l - contents)
3191 + sizeof (Elf_External_Options)
3192 + (sizeof (Elf64_External_RegInfo) - 8)),
3193 SEEK_SET) != 0)
3194 return false;
3195 H_PUT_64 (abfd, elf_gp (abfd), buf);
3196 if (bfd_bwrite (buf, (bfd_size_type) 8, abfd) != 8)
3197 return false;
3198 }
3199 else if (intopt.kind == ODK_REGINFO)
3200 {
3201 bfd_byte buf[4];
3202
3203 if (bfd_seek (abfd,
3204 (hdr->sh_offset
3205 + (l - contents)
3206 + sizeof (Elf_External_Options)
3207 + (sizeof (Elf32_External_RegInfo) - 4)),
3208 SEEK_SET) != 0)
3209 return false;
3210 H_PUT_32 (abfd, elf_gp (abfd), buf);
3211 if (bfd_bwrite (buf, (bfd_size_type) 4, abfd) != 4)
3212 return false;
3213 }
3214 l += intopt.size;
3215 }
3216 }
3217
3218 if (hdr->bfd_section != NULL)
3219 {
3220 const char *name = bfd_get_section_name (abfd, hdr->bfd_section);
3221
3222 if (strcmp (name, ".sdata") == 0
3223 || strcmp (name, ".lit8") == 0
3224 || strcmp (name, ".lit4") == 0)
3225 {
3226 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
3227 hdr->sh_type = SHT_PROGBITS;
3228 }
3229 else if (strcmp (name, ".sbss") == 0)
3230 {
3231 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
3232 hdr->sh_type = SHT_NOBITS;
3233 }
3234 else if (strcmp (name, MIPS_ELF_SRDATA_SECTION_NAME (abfd)) == 0)
3235 {
3236 hdr->sh_flags |= SHF_ALLOC | SHF_MIPS_GPREL;
3237 hdr->sh_type = SHT_PROGBITS;
3238 }
3239 else if (strcmp (name, ".compact_rel") == 0)
3240 {
3241 hdr->sh_flags = 0;
3242 hdr->sh_type = SHT_PROGBITS;
3243 }
3244 else if (strcmp (name, ".rtproc") == 0)
3245 {
3246 if (hdr->sh_addralign != 0 && hdr->sh_entsize == 0)
3247 {
3248 unsigned int adjust;
3249
3250 adjust = hdr->sh_size % hdr->sh_addralign;
3251 if (adjust != 0)
3252 hdr->sh_size += hdr->sh_addralign - adjust;
3253 }
3254 }
3255 }
3256
3257 return true;
3258 }
3259 \f
3260 /* MIPS ELF uses two common sections. One is the usual one, and the
3261 other is for small objects. All the small objects are kept
3262 together, and then referenced via the gp pointer, which yields
3263 faster assembler code. This is what we use for the small common
3264 section. This approach is copied from ecoff.c. */
3265 static asection mips_elf_scom_section;
3266 static asymbol mips_elf_scom_symbol;
3267 static asymbol *mips_elf_scom_symbol_ptr;
3268
3269 /* MIPS ELF also uses an acommon section, which represents an
3270 allocated common symbol which may be overridden by a
3271 definition in a shared library. */
3272 static asection mips_elf_acom_section;
3273 static asymbol mips_elf_acom_symbol;
3274 static asymbol *mips_elf_acom_symbol_ptr;
3275
3276 /* Handle the special MIPS section numbers that a symbol may use.
3277 This is used for both the 32-bit and the 64-bit ABI. */
3278
3279 void
3280 _bfd_mips_elf_symbol_processing (abfd, asym)
3281 bfd *abfd;
3282 asymbol *asym;
3283 {
3284 elf_symbol_type *elfsym;
3285
3286 elfsym = (elf_symbol_type *) asym;
3287 switch (elfsym->internal_elf_sym.st_shndx)
3288 {
3289 case SHN_MIPS_ACOMMON:
3290 /* This section is used in a dynamically linked executable file.
3291 It is an allocated common section. The dynamic linker can
3292 either resolve these symbols to something in a shared
3293 library, or it can just leave them here. For our purposes,
3294 we can consider these symbols to be in a new section. */
3295 if (mips_elf_acom_section.name == NULL)
3296 {
3297 /* Initialize the acommon section. */
3298 mips_elf_acom_section.name = ".acommon";
3299 mips_elf_acom_section.flags = SEC_ALLOC;
3300 mips_elf_acom_section.output_section = &mips_elf_acom_section;
3301 mips_elf_acom_section.symbol = &mips_elf_acom_symbol;
3302 mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr;
3303 mips_elf_acom_symbol.name = ".acommon";
3304 mips_elf_acom_symbol.flags = BSF_SECTION_SYM;
3305 mips_elf_acom_symbol.section = &mips_elf_acom_section;
3306 mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol;
3307 }
3308 asym->section = &mips_elf_acom_section;
3309 break;
3310
3311 case SHN_COMMON:
3312 /* Common symbols less than the GP size are automatically
3313 treated as SHN_MIPS_SCOMMON symbols on IRIX5. */
3314 if (asym->value > elf_gp_size (abfd)
3315 || IRIX_COMPAT (abfd) == ict_irix6)
3316 break;
3317 /* Fall through. */
3318 case SHN_MIPS_SCOMMON:
3319 if (mips_elf_scom_section.name == NULL)
3320 {
3321 /* Initialize the small common section. */
3322 mips_elf_scom_section.name = ".scommon";
3323 mips_elf_scom_section.flags = SEC_IS_COMMON;
3324 mips_elf_scom_section.output_section = &mips_elf_scom_section;
3325 mips_elf_scom_section.symbol = &mips_elf_scom_symbol;
3326 mips_elf_scom_section.symbol_ptr_ptr = &mips_elf_scom_symbol_ptr;
3327 mips_elf_scom_symbol.name = ".scommon";
3328 mips_elf_scom_symbol.flags = BSF_SECTION_SYM;
3329 mips_elf_scom_symbol.section = &mips_elf_scom_section;
3330 mips_elf_scom_symbol_ptr = &mips_elf_scom_symbol;
3331 }
3332 asym->section = &mips_elf_scom_section;
3333 asym->value = elfsym->internal_elf_sym.st_size;
3334 break;
3335
3336 case SHN_MIPS_SUNDEFINED:
3337 asym->section = bfd_und_section_ptr;
3338 break;
3339
3340 #if 0 /* for SGI_COMPAT */
3341 case SHN_MIPS_TEXT:
3342 asym->section = mips_elf_text_section_ptr;
3343 break;
3344
3345 case SHN_MIPS_DATA:
3346 asym->section = mips_elf_data_section_ptr;
3347 break;
3348 #endif
3349 }
3350 }
3351 \f
3352 /* When creating an Irix 5 executable, we need REGINFO and RTPROC
3353 segments. */
3354
3355 int
3356 _bfd_mips_elf_additional_program_headers (abfd)
3357 bfd *abfd;
3358 {
3359 asection *s;
3360 int ret = 0;
3361
3362 /* See if we need a PT_MIPS_REGINFO segment. */
3363 s = bfd_get_section_by_name (abfd, ".reginfo");
3364 if (s && (s->flags & SEC_LOAD))
3365 ++ret;
3366
3367 /* See if we need a PT_MIPS_OPTIONS segment. */
3368 if (IRIX_COMPAT (abfd) == ict_irix6
3369 && bfd_get_section_by_name (abfd,
3370 MIPS_ELF_OPTIONS_SECTION_NAME (abfd)))
3371 ++ret;
3372
3373 /* See if we need a PT_MIPS_RTPROC segment. */
3374 if (IRIX_COMPAT (abfd) == ict_irix5
3375 && bfd_get_section_by_name (abfd, ".dynamic")
3376 && bfd_get_section_by_name (abfd, ".mdebug"))
3377 ++ret;
3378
3379 return ret;
3380 }
3381
3382 /* Modify the segment map for an Irix 5 executable. */
3383
3384 boolean
3385 _bfd_mips_elf_modify_segment_map (abfd)
3386 bfd *abfd;
3387 {
3388 asection *s;
3389 struct elf_segment_map *m, **pm;
3390 bfd_size_type amt;
3391
3392 /* If there is a .reginfo section, we need a PT_MIPS_REGINFO
3393 segment. */
3394 s = bfd_get_section_by_name (abfd, ".reginfo");
3395 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3396 {
3397 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3398 if (m->p_type == PT_MIPS_REGINFO)
3399 break;
3400 if (m == NULL)
3401 {
3402 amt = sizeof *m;
3403 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3404 if (m == NULL)
3405 return false;
3406
3407 m->p_type = PT_MIPS_REGINFO;
3408 m->count = 1;
3409 m->sections[0] = s;
3410
3411 /* We want to put it after the PHDR and INTERP segments. */
3412 pm = &elf_tdata (abfd)->segment_map;
3413 while (*pm != NULL
3414 && ((*pm)->p_type == PT_PHDR
3415 || (*pm)->p_type == PT_INTERP))
3416 pm = &(*pm)->next;
3417
3418 m->next = *pm;
3419 *pm = m;
3420 }
3421 }
3422
3423 /* For IRIX 6, we don't have .mdebug sections, nor does anything but
3424 .dynamic end up in PT_DYNAMIC. However, we do have to insert a
3425 PT_OPTIONS segement immediately following the program header
3426 table. */
3427 if (IRIX_COMPAT (abfd) == ict_irix6)
3428 {
3429 for (s = abfd->sections; s; s = s->next)
3430 if (elf_section_data (s)->this_hdr.sh_type == SHT_MIPS_OPTIONS)
3431 break;
3432
3433 if (s)
3434 {
3435 struct elf_segment_map *options_segment;
3436
3437 /* Usually, there's a program header table. But, sometimes
3438 there's not (like when running the `ld' testsuite). So,
3439 if there's no program header table, we just put the
3440 options segement at the end. */
3441 for (pm = &elf_tdata (abfd)->segment_map;
3442 *pm != NULL;
3443 pm = &(*pm)->next)
3444 if ((*pm)->p_type == PT_PHDR)
3445 break;
3446
3447 amt = sizeof (struct elf_segment_map);
3448 options_segment = bfd_zalloc (abfd, amt);
3449 options_segment->next = *pm;
3450 options_segment->p_type = PT_MIPS_OPTIONS;
3451 options_segment->p_flags = PF_R;
3452 options_segment->p_flags_valid = true;
3453 options_segment->count = 1;
3454 options_segment->sections[0] = s;
3455 *pm = options_segment;
3456 }
3457 }
3458 else
3459 {
3460 if (IRIX_COMPAT (abfd) == ict_irix5)
3461 {
3462 /* If there are .dynamic and .mdebug sections, we make a room
3463 for the RTPROC header. FIXME: Rewrite without section names. */
3464 if (bfd_get_section_by_name (abfd, ".interp") == NULL
3465 && bfd_get_section_by_name (abfd, ".dynamic") != NULL
3466 && bfd_get_section_by_name (abfd, ".mdebug") != NULL)
3467 {
3468 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3469 if (m->p_type == PT_MIPS_RTPROC)
3470 break;
3471 if (m == NULL)
3472 {
3473 amt = sizeof *m;
3474 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3475 if (m == NULL)
3476 return false;
3477
3478 m->p_type = PT_MIPS_RTPROC;
3479
3480 s = bfd_get_section_by_name (abfd, ".rtproc");
3481 if (s == NULL)
3482 {
3483 m->count = 0;
3484 m->p_flags = 0;
3485 m->p_flags_valid = 1;
3486 }
3487 else
3488 {
3489 m->count = 1;
3490 m->sections[0] = s;
3491 }
3492
3493 /* We want to put it after the DYNAMIC segment. */
3494 pm = &elf_tdata (abfd)->segment_map;
3495 while (*pm != NULL && (*pm)->p_type != PT_DYNAMIC)
3496 pm = &(*pm)->next;
3497 if (*pm != NULL)
3498 pm = &(*pm)->next;
3499
3500 m->next = *pm;
3501 *pm = m;
3502 }
3503 }
3504 }
3505 /* On Irix 5, the PT_DYNAMIC segment includes the .dynamic,
3506 .dynstr, .dynsym, and .hash sections, and everything in
3507 between. */
3508 for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL;
3509 pm = &(*pm)->next)
3510 if ((*pm)->p_type == PT_DYNAMIC)
3511 break;
3512 m = *pm;
3513 if (IRIX_COMPAT (abfd) == ict_none)
3514 {
3515 /* For a normal mips executable the permissions for the PT_DYNAMIC
3516 segment are read, write and execute. We do that here since
3517 the code in elf.c sets only the read permission. This matters
3518 sometimes for the dynamic linker. */
3519 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3520 {
3521 m->p_flags = PF_R | PF_W | PF_X;
3522 m->p_flags_valid = 1;
3523 }
3524 }
3525 if (m != NULL
3526 && m->count == 1 && strcmp (m->sections[0]->name, ".dynamic") == 0)
3527 {
3528 static const char *sec_names[] =
3529 {
3530 ".dynamic", ".dynstr", ".dynsym", ".hash"
3531 };
3532 bfd_vma low, high;
3533 unsigned int i, c;
3534 struct elf_segment_map *n;
3535
3536 low = 0xffffffff;
3537 high = 0;
3538 for (i = 0; i < sizeof sec_names / sizeof sec_names[0]; i++)
3539 {
3540 s = bfd_get_section_by_name (abfd, sec_names[i]);
3541 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3542 {
3543 bfd_size_type sz;
3544
3545 if (low > s->vma)
3546 low = s->vma;
3547 sz = s->_cooked_size;
3548 if (sz == 0)
3549 sz = s->_raw_size;
3550 if (high < s->vma + sz)
3551 high = s->vma + sz;
3552 }
3553 }
3554
3555 c = 0;
3556 for (s = abfd->sections; s != NULL; s = s->next)
3557 if ((s->flags & SEC_LOAD) != 0
3558 && s->vma >= low
3559 && ((s->vma
3560 + (s->_cooked_size !=
3561 0 ? s->_cooked_size : s->_raw_size)) <= high))
3562 ++c;
3563
3564 amt = sizeof *n + (bfd_size_type) (c - 1) * sizeof (asection *);
3565 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3566 if (n == NULL)
3567 return false;
3568 *n = *m;
3569 n->count = c;
3570
3571 i = 0;
3572 for (s = abfd->sections; s != NULL; s = s->next)
3573 {
3574 if ((s->flags & SEC_LOAD) != 0
3575 && s->vma >= low
3576 && ((s->vma
3577 + (s->_cooked_size != 0 ?
3578 s->_cooked_size : s->_raw_size)) <= high))
3579 {
3580 n->sections[i] = s;
3581 ++i;
3582 }
3583 }
3584
3585 *pm = n;
3586 }
3587 }
3588
3589 return true;
3590 }
3591 \f
3592 /* The structure of the runtime procedure descriptor created by the
3593 loader for use by the static exception system. */
3594
3595 typedef struct runtime_pdr {
3596 bfd_vma adr; /* memory address of start of procedure */
3597 long regmask; /* save register mask */
3598 long regoffset; /* save register offset */
3599 long fregmask; /* save floating point register mask */
3600 long fregoffset; /* save floating point register offset */
3601 long frameoffset; /* frame size */
3602 short framereg; /* frame pointer register */
3603 short pcreg; /* offset or reg of return pc */
3604 long irpss; /* index into the runtime string table */
3605 long reserved;
3606 struct exception_info *exception_info;/* pointer to exception array */
3607 } RPDR, *pRPDR;
3608 #define cbRPDR sizeof (RPDR)
3609 #define rpdNil ((pRPDR) 0)
3610
3611 /* Swap RPDR (runtime procedure table entry) for output. */
3612
3613 static void ecoff_swap_rpdr_out
3614 PARAMS ((bfd *, const RPDR *, struct rpdr_ext *));
3615
3616 static void
3617 ecoff_swap_rpdr_out (abfd, in, ex)
3618 bfd *abfd;
3619 const RPDR *in;
3620 struct rpdr_ext *ex;
3621 {
3622 /* ECOFF_PUT_OFF was defined in ecoffswap.h. */
3623 ECOFF_PUT_OFF (abfd, in->adr, ex->p_adr);
3624 H_PUT_32 (abfd, in->regmask, ex->p_regmask);
3625 H_PUT_32 (abfd, in->regoffset, ex->p_regoffset);
3626 H_PUT_32 (abfd, in->fregmask, ex->p_fregmask);
3627 H_PUT_32 (abfd, in->fregoffset, ex->p_fregoffset);
3628 H_PUT_32 (abfd, in->frameoffset, ex->p_frameoffset);
3629
3630 H_PUT_16 (abfd, in->framereg, ex->p_framereg);
3631 H_PUT_16 (abfd, in->pcreg, ex->p_pcreg);
3632
3633 H_PUT_32 (abfd, in->irpss, ex->p_irpss);
3634 #if 0 /* FIXME */
3635 ECOFF_PUT_OFF (abfd, in->exception_info, ex->p_exception_info);
3636 #endif
3637 }
3638 \f
3639 /* Read ECOFF debugging information from a .mdebug section into a
3640 ecoff_debug_info structure. */
3641
3642 boolean
3643 _bfd_mips_elf_read_ecoff_info (abfd, section, debug)
3644 bfd *abfd;
3645 asection *section;
3646 struct ecoff_debug_info *debug;
3647 {
3648 HDRR *symhdr;
3649 const struct ecoff_debug_swap *swap;
3650 char *ext_hdr = NULL;
3651
3652 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
3653 memset (debug, 0, sizeof (*debug));
3654
3655 ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
3656 if (ext_hdr == NULL && swap->external_hdr_size != 0)
3657 goto error_return;
3658
3659 if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
3660 swap->external_hdr_size)
3661 == false)
3662 goto error_return;
3663
3664 symhdr = &debug->symbolic_header;
3665 (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
3666
3667 /* The symbolic header contains absolute file offsets and sizes to
3668 read. */
3669 #define READ(ptr, offset, count, size, type) \
3670 if (symhdr->count == 0) \
3671 debug->ptr = NULL; \
3672 else \
3673 { \
3674 bfd_size_type amt = (bfd_size_type) size * symhdr->count; \
3675 debug->ptr = (type) bfd_malloc (amt); \
3676 if (debug->ptr == NULL) \
3677 goto error_return; \
3678 if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
3679 || bfd_bread (debug->ptr, amt, abfd) != amt) \
3680 goto error_return; \
3681 }
3682
3683 READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
3684 READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
3685 READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
3686 READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
3687 READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
3688 READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
3689 union aux_ext *);
3690 READ (ss, cbSsOffset, issMax, sizeof (char), char *);
3691 READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
3692 READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
3693 READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
3694 READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
3695 #undef READ
3696
3697 debug->fdr = NULL;
3698 debug->adjust = NULL;
3699
3700 return true;
3701
3702 error_return:
3703 if (ext_hdr != NULL)
3704 free (ext_hdr);
3705 if (debug->line != NULL)
3706 free (debug->line);
3707 if (debug->external_dnr != NULL)
3708 free (debug->external_dnr);
3709 if (debug->external_pdr != NULL)
3710 free (debug->external_pdr);
3711 if (debug->external_sym != NULL)
3712 free (debug->external_sym);
3713 if (debug->external_opt != NULL)
3714 free (debug->external_opt);
3715 if (debug->external_aux != NULL)
3716 free (debug->external_aux);
3717 if (debug->ss != NULL)
3718 free (debug->ss);
3719 if (debug->ssext != NULL)
3720 free (debug->ssext);
3721 if (debug->external_fdr != NULL)
3722 free (debug->external_fdr);
3723 if (debug->external_rfd != NULL)
3724 free (debug->external_rfd);
3725 if (debug->external_ext != NULL)
3726 free (debug->external_ext);
3727 return false;
3728 }
3729 \f
3730 /* MIPS ELF local labels start with '$', not 'L'. */
3731
3732 static boolean
3733 mips_elf_is_local_label_name (abfd, name)
3734 bfd *abfd;
3735 const char *name;
3736 {
3737 if (name[0] == '$')
3738 return true;
3739
3740 /* On Irix 6, the labels go back to starting with '.', so we accept
3741 the generic ELF local label syntax as well. */
3742 return _bfd_elf_is_local_label_name (abfd, name);
3743 }
3744
3745 /* MIPS ELF uses a special find_nearest_line routine in order the
3746 handle the ECOFF debugging information. */
3747
3748 struct mips_elf_find_line
3749 {
3750 struct ecoff_debug_info d;
3751 struct ecoff_find_line i;
3752 };
3753
3754 boolean
3755 _bfd_mips_elf_find_nearest_line (abfd, section, symbols, offset, filename_ptr,
3756 functionname_ptr, line_ptr)
3757 bfd *abfd;
3758 asection *section;
3759 asymbol **symbols;
3760 bfd_vma offset;
3761 const char **filename_ptr;
3762 const char **functionname_ptr;
3763 unsigned int *line_ptr;
3764 {
3765 asection *msec;
3766
3767 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
3768 filename_ptr, functionname_ptr,
3769 line_ptr))
3770 return true;
3771
3772 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
3773 filename_ptr, functionname_ptr,
3774 line_ptr,
3775 (unsigned) (ABI_64_P (abfd) ? 8 : 0),
3776 &elf_tdata (abfd)->dwarf2_find_line_info))
3777 return true;
3778
3779 msec = bfd_get_section_by_name (abfd, ".mdebug");
3780 if (msec != NULL)
3781 {
3782 flagword origflags;
3783 struct mips_elf_find_line *fi;
3784 const struct ecoff_debug_swap * const swap =
3785 get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
3786
3787 /* If we are called during a link, mips_elf_final_link may have
3788 cleared the SEC_HAS_CONTENTS field. We force it back on here
3789 if appropriate (which it normally will be). */
3790 origflags = msec->flags;
3791 if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
3792 msec->flags |= SEC_HAS_CONTENTS;
3793
3794 fi = elf_tdata (abfd)->find_line_info;
3795 if (fi == NULL)
3796 {
3797 bfd_size_type external_fdr_size;
3798 char *fraw_src;
3799 char *fraw_end;
3800 struct fdr *fdr_ptr;
3801 bfd_size_type amt = sizeof (struct mips_elf_find_line);
3802
3803 fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt);
3804 if (fi == NULL)
3805 {
3806 msec->flags = origflags;
3807 return false;
3808 }
3809
3810 if (! _bfd_mips_elf_read_ecoff_info (abfd, msec, &fi->d))
3811 {
3812 msec->flags = origflags;
3813 return false;
3814 }
3815
3816 /* Swap in the FDR information. */
3817 amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
3818 fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
3819 if (fi->d.fdr == NULL)
3820 {
3821 msec->flags = origflags;
3822 return false;
3823 }
3824 external_fdr_size = swap->external_fdr_size;
3825 fdr_ptr = fi->d.fdr;
3826 fraw_src = (char *) fi->d.external_fdr;
3827 fraw_end = (fraw_src
3828 + fi->d.symbolic_header.ifdMax * external_fdr_size);
3829 for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
3830 (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
3831
3832 elf_tdata (abfd)->find_line_info = fi;
3833
3834 /* Note that we don't bother to ever free this information.
3835 find_nearest_line is either called all the time, as in
3836 objdump -l, so the information should be saved, or it is
3837 rarely called, as in ld error messages, so the memory
3838 wasted is unimportant. Still, it would probably be a
3839 good idea for free_cached_info to throw it away. */
3840 }
3841
3842 if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
3843 &fi->i, filename_ptr, functionname_ptr,
3844 line_ptr))
3845 {
3846 msec->flags = origflags;
3847 return true;
3848 }
3849
3850 msec->flags = origflags;
3851 }
3852
3853 /* Fall back on the generic ELF find_nearest_line routine. */
3854
3855 return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
3856 filename_ptr, functionname_ptr,
3857 line_ptr);
3858 }
3859 \f
3860 /* The mips16 compiler uses a couple of special sections to handle
3861 floating point arguments.
3862
3863 Section names that look like .mips16.fn.FNNAME contain stubs that
3864 copy floating point arguments from the fp regs to the gp regs and
3865 then jump to FNNAME. If any 32 bit function calls FNNAME, the
3866 call should be redirected to the stub instead. If no 32 bit
3867 function calls FNNAME, the stub should be discarded. We need to
3868 consider any reference to the function, not just a call, because
3869 if the address of the function is taken we will need the stub,
3870 since the address might be passed to a 32 bit function.
3871
3872 Section names that look like .mips16.call.FNNAME contain stubs
3873 that copy floating point arguments from the gp regs to the fp
3874 regs and then jump to FNNAME. If FNNAME is a 32 bit function,
3875 then any 16 bit function that calls FNNAME should be redirected
3876 to the stub instead. If FNNAME is not a 32 bit function, the
3877 stub should be discarded.
3878
3879 .mips16.call.fp.FNNAME sections are similar, but contain stubs
3880 which call FNNAME and then copy the return value from the fp regs
3881 to the gp regs. These stubs store the return value in $18 while
3882 calling FNNAME; any function which might call one of these stubs
3883 must arrange to save $18 around the call. (This case is not
3884 needed for 32 bit functions that call 16 bit functions, because
3885 16 bit functions always return floating point values in both
3886 $f0/$f1 and $2/$3.)
3887
3888 Note that in all cases FNNAME might be defined statically.
3889 Therefore, FNNAME is not used literally. Instead, the relocation
3890 information will indicate which symbol the section is for.
3891
3892 We record any stubs that we find in the symbol table. */
3893
3894 #define FN_STUB ".mips16.fn."
3895 #define CALL_STUB ".mips16.call."
3896 #define CALL_FP_STUB ".mips16.call.fp."
3897
3898 /* MIPS ELF linker hash table. */
3899
3900 struct mips_elf_link_hash_table
3901 {
3902 struct elf_link_hash_table root;
3903 #if 0
3904 /* We no longer use this. */
3905 /* String section indices for the dynamic section symbols. */
3906 bfd_size_type dynsym_sec_strindex[SIZEOF_MIPS_DYNSYM_SECNAMES];
3907 #endif
3908 /* The number of .rtproc entries. */
3909 bfd_size_type procedure_count;
3910 /* The size of the .compact_rel section (if SGI_COMPAT). */
3911 bfd_size_type compact_rel_size;
3912 /* This flag indicates that the value of DT_MIPS_RLD_MAP dynamic
3913 entry is set to the address of __rld_obj_head as in Irix 5. */
3914 boolean use_rld_obj_head;
3915 /* This is the value of the __rld_map or __rld_obj_head symbol. */
3916 bfd_vma rld_value;
3917 /* This is set if we see any mips16 stub sections. */
3918 boolean mips16_stubs_seen;
3919 };
3920
3921 /* Look up an entry in a MIPS ELF linker hash table. */
3922
3923 #define mips_elf_link_hash_lookup(table, string, create, copy, follow) \
3924 ((struct mips_elf_link_hash_entry *) \
3925 elf_link_hash_lookup (&(table)->root, (string), (create), \
3926 (copy), (follow)))
3927
3928 /* Traverse a MIPS ELF linker hash table. */
3929
3930 #define mips_elf_link_hash_traverse(table, func, info) \
3931 (elf_link_hash_traverse \
3932 (&(table)->root, \
3933 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
3934 (info)))
3935
3936 /* Get the MIPS ELF linker hash table from a link_info structure. */
3937
3938 #define mips_elf_hash_table(p) \
3939 ((struct mips_elf_link_hash_table *) ((p)->hash))
3940
3941 static boolean mips_elf_output_extsym
3942 PARAMS ((struct mips_elf_link_hash_entry *, PTR));
3943
3944 /* Create an entry in a MIPS ELF linker hash table. */
3945
3946 static struct bfd_hash_entry *
3947 mips_elf_link_hash_newfunc (entry, table, string)
3948 struct bfd_hash_entry *entry;
3949 struct bfd_hash_table *table;
3950 const char *string;
3951 {
3952 struct mips_elf_link_hash_entry *ret =
3953 (struct mips_elf_link_hash_entry *) entry;
3954
3955 /* Allocate the structure if it has not already been allocated by a
3956 subclass. */
3957 if (ret == (struct mips_elf_link_hash_entry *) NULL)
3958 ret = ((struct mips_elf_link_hash_entry *)
3959 bfd_hash_allocate (table,
3960 sizeof (struct mips_elf_link_hash_entry)));
3961 if (ret == (struct mips_elf_link_hash_entry *) NULL)
3962 return (struct bfd_hash_entry *) ret;
3963
3964 /* Call the allocation method of the superclass. */
3965 ret = ((struct mips_elf_link_hash_entry *)
3966 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3967 table, string));
3968 if (ret != (struct mips_elf_link_hash_entry *) NULL)
3969 {
3970 /* Set local fields. */
3971 memset (&ret->esym, 0, sizeof (EXTR));
3972 /* We use -2 as a marker to indicate that the information has
3973 not been set. -1 means there is no associated ifd. */
3974 ret->esym.ifd = -2;
3975 ret->possibly_dynamic_relocs = 0;
3976 ret->readonly_reloc = false;
3977 ret->min_dyn_reloc_index = 0;
3978 ret->no_fn_stub = false;
3979 ret->fn_stub = NULL;
3980 ret->need_fn_stub = false;
3981 ret->call_stub = NULL;
3982 ret->call_fp_stub = NULL;
3983 }
3984
3985 return (struct bfd_hash_entry *) ret;
3986 }
3987
3988 static void
3989 _bfd_mips_elf_hide_symbol (info, entry)
3990 struct bfd_link_info *info;
3991 struct elf_link_hash_entry *entry;
3992 {
3993 bfd *dynobj;
3994 asection *got;
3995 struct mips_got_info *g;
3996 struct mips_elf_link_hash_entry *h;
3997 h = (struct mips_elf_link_hash_entry *) entry;
3998 dynobj = elf_hash_table (info)->dynobj;
3999 got = bfd_get_section_by_name (dynobj, ".got");
4000 g = (struct mips_got_info *) elf_section_data (got)->tdata;
4001
4002 h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4003 h->root.plt.offset = (bfd_vma) -1;
4004 if ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
4005 h->root.dynindx = -1;
4006
4007 /* FIXME: Do we allocate too much GOT space here? */
4008 g->local_gotno++;
4009 got->_raw_size += MIPS_ELF_GOT_SIZE (dynobj);
4010 }
4011
4012 /* Create a MIPS ELF linker hash table. */
4013
4014 struct bfd_link_hash_table *
4015 _bfd_mips_elf_link_hash_table_create (abfd)
4016 bfd *abfd;
4017 {
4018 struct mips_elf_link_hash_table *ret;
4019 bfd_size_type amt = sizeof (struct mips_elf_link_hash_table);
4020
4021 ret = (struct mips_elf_link_hash_table *) bfd_alloc (abfd, amt);
4022 if (ret == (struct mips_elf_link_hash_table *) NULL)
4023 return NULL;
4024
4025 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
4026 mips_elf_link_hash_newfunc))
4027 {
4028 bfd_release (abfd, ret);
4029 return NULL;
4030 }
4031
4032 #if 0
4033 /* We no longer use this. */
4034 for (i = 0; i < SIZEOF_MIPS_DYNSYM_SECNAMES; i++)
4035 ret->dynsym_sec_strindex[i] = (bfd_size_type) -1;
4036 #endif
4037 ret->procedure_count = 0;
4038 ret->compact_rel_size = 0;
4039 ret->use_rld_obj_head = false;
4040 ret->rld_value = 0;
4041 ret->mips16_stubs_seen = false;
4042
4043 return &ret->root.root;
4044 }
4045
4046 /* Hook called by the linker routine which adds symbols from an object
4047 file. We must handle the special MIPS section numbers here. */
4048
4049 boolean
4050 _bfd_mips_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
4051 bfd *abfd;
4052 struct bfd_link_info *info;
4053 const Elf_Internal_Sym *sym;
4054 const char **namep;
4055 flagword *flagsp ATTRIBUTE_UNUSED;
4056 asection **secp;
4057 bfd_vma *valp;
4058 {
4059 if (SGI_COMPAT (abfd)
4060 && (abfd->flags & DYNAMIC) != 0
4061 && strcmp (*namep, "_rld_new_interface") == 0)
4062 {
4063 /* Skip Irix 5 rld entry name. */
4064 *namep = NULL;
4065 return true;
4066 }
4067
4068 switch (sym->st_shndx)
4069 {
4070 case SHN_COMMON:
4071 /* Common symbols less than the GP size are automatically
4072 treated as SHN_MIPS_SCOMMON symbols. */
4073 if (sym->st_size > elf_gp_size (abfd)
4074 || IRIX_COMPAT (abfd) == ict_irix6)
4075 break;
4076 /* Fall through. */
4077 case SHN_MIPS_SCOMMON:
4078 *secp = bfd_make_section_old_way (abfd, ".scommon");
4079 (*secp)->flags |= SEC_IS_COMMON;
4080 *valp = sym->st_size;
4081 break;
4082
4083 case SHN_MIPS_TEXT:
4084 /* This section is used in a shared object. */
4085 if (elf_tdata (abfd)->elf_text_section == NULL)
4086 {
4087 asymbol *elf_text_symbol;
4088 asection *elf_text_section;
4089 bfd_size_type amt = sizeof (asection);
4090
4091 elf_text_section = bfd_zalloc (abfd, amt);
4092 if (elf_text_section == NULL)
4093 return false;
4094
4095 amt = sizeof (asymbol);
4096 elf_text_symbol = bfd_zalloc (abfd, amt);
4097 if (elf_text_symbol == NULL)
4098 return false;
4099
4100 /* Initialize the section. */
4101
4102 elf_tdata (abfd)->elf_text_section = elf_text_section;
4103 elf_tdata (abfd)->elf_text_symbol = elf_text_symbol;
4104
4105 elf_text_section->symbol = elf_text_symbol;
4106 elf_text_section->symbol_ptr_ptr = &elf_tdata (abfd)->elf_text_symbol;
4107
4108 elf_text_section->name = ".text";
4109 elf_text_section->flags = SEC_NO_FLAGS;
4110 elf_text_section->output_section = NULL;
4111 elf_text_section->owner = abfd;
4112 elf_text_symbol->name = ".text";
4113 elf_text_symbol->flags = BSF_SECTION_SYM | BSF_DYNAMIC;
4114 elf_text_symbol->section = elf_text_section;
4115 }
4116 /* This code used to do *secp = bfd_und_section_ptr if
4117 info->shared. I don't know why, and that doesn't make sense,
4118 so I took it out. */
4119 *secp = elf_tdata (abfd)->elf_text_section;
4120 break;
4121
4122 case SHN_MIPS_ACOMMON:
4123 /* Fall through. XXX Can we treat this as allocated data? */
4124 case SHN_MIPS_DATA:
4125 /* This section is used in a shared object. */
4126 if (elf_tdata (abfd)->elf_data_section == NULL)
4127 {
4128 asymbol *elf_data_symbol;
4129 asection *elf_data_section;
4130 bfd_size_type amt = sizeof (asection);
4131
4132 elf_data_section = bfd_zalloc (abfd, amt);
4133 if (elf_data_section == NULL)
4134 return false;
4135
4136 amt = sizeof (asymbol);
4137 elf_data_symbol = bfd_zalloc (abfd, amt);
4138 if (elf_data_symbol == NULL)
4139 return false;
4140
4141 /* Initialize the section. */
4142
4143 elf_tdata (abfd)->elf_data_section = elf_data_section;
4144 elf_tdata (abfd)->elf_data_symbol = elf_data_symbol;
4145
4146 elf_data_section->symbol = elf_data_symbol;
4147 elf_data_section->symbol_ptr_ptr = &elf_tdata (abfd)->elf_data_symbol;
4148
4149 elf_data_section->name = ".data";
4150 elf_data_section->flags = SEC_NO_FLAGS;
4151 elf_data_section->output_section = NULL;
4152 elf_data_section->owner = abfd;
4153 elf_data_symbol->name = ".data";
4154 elf_data_symbol->flags = BSF_SECTION_SYM | BSF_DYNAMIC;
4155 elf_data_symbol->section = elf_data_section;
4156 }
4157 /* This code used to do *secp = bfd_und_section_ptr if
4158 info->shared. I don't know why, and that doesn't make sense,
4159 so I took it out. */
4160 *secp = elf_tdata (abfd)->elf_data_section;
4161 break;
4162
4163 case SHN_MIPS_SUNDEFINED:
4164 *secp = bfd_und_section_ptr;
4165 break;
4166 }
4167
4168 if (SGI_COMPAT (abfd)
4169 && ! info->shared
4170 && info->hash->creator == abfd->xvec
4171 && strcmp (*namep, "__rld_obj_head") == 0)
4172 {
4173 struct elf_link_hash_entry *h;
4174
4175 /* Mark __rld_obj_head as dynamic. */
4176 h = NULL;
4177 if (! (_bfd_generic_link_add_one_symbol
4178 (info, abfd, *namep, BSF_GLOBAL, *secp,
4179 (bfd_vma) *valp, (const char *) NULL, false,
4180 get_elf_backend_data (abfd)->collect,
4181 (struct bfd_link_hash_entry **) &h)))
4182 return false;
4183 h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4184 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4185 h->type = STT_OBJECT;
4186
4187 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
4188 return false;
4189
4190 mips_elf_hash_table (info)->use_rld_obj_head = true;
4191 }
4192
4193 /* If this is a mips16 text symbol, add 1 to the value to make it
4194 odd. This will cause something like .word SYM to come up with
4195 the right value when it is loaded into the PC. */
4196 if (sym->st_other == STO_MIPS16)
4197 ++*valp;
4198
4199 return true;
4200 }
4201
4202 /* Structure used to pass information to mips_elf_output_extsym. */
4203
4204 struct extsym_info
4205 {
4206 bfd *abfd;
4207 struct bfd_link_info *info;
4208 struct ecoff_debug_info *debug;
4209 const struct ecoff_debug_swap *swap;
4210 boolean failed;
4211 };
4212
4213 /* This routine is used to write out ECOFF debugging external symbol
4214 information. It is called via mips_elf_link_hash_traverse. The
4215 ECOFF external symbol information must match the ELF external
4216 symbol information. Unfortunately, at this point we don't know
4217 whether a symbol is required by reloc information, so the two
4218 tables may wind up being different. We must sort out the external
4219 symbol information before we can set the final size of the .mdebug
4220 section, and we must set the size of the .mdebug section before we
4221 can relocate any sections, and we can't know which symbols are
4222 required by relocation until we relocate the sections.
4223 Fortunately, it is relatively unlikely that any symbol will be
4224 stripped but required by a reloc. In particular, it can not happen
4225 when generating a final executable. */
4226
4227 static boolean
4228 mips_elf_output_extsym (h, data)
4229 struct mips_elf_link_hash_entry *h;
4230 PTR data;
4231 {
4232 struct extsym_info *einfo = (struct extsym_info *) data;
4233 boolean strip;
4234 asection *sec, *output_section;
4235
4236 if (h->root.indx == -2)
4237 strip = false;
4238 else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4239 || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
4240 && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4241 && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
4242 strip = true;
4243 else if (einfo->info->strip == strip_all
4244 || (einfo->info->strip == strip_some
4245 && bfd_hash_lookup (einfo->info->keep_hash,
4246 h->root.root.root.string,
4247 false, false) == NULL))
4248 strip = true;
4249 else
4250 strip = false;
4251
4252 if (strip)
4253 return true;
4254
4255 if (h->esym.ifd == -2)
4256 {
4257 h->esym.jmptbl = 0;
4258 h->esym.cobol_main = 0;
4259 h->esym.weakext = 0;
4260 h->esym.reserved = 0;
4261 h->esym.ifd = ifdNil;
4262 h->esym.asym.value = 0;
4263 h->esym.asym.st = stGlobal;
4264
4265 if (h->root.root.type == bfd_link_hash_undefined
4266 || h->root.root.type == bfd_link_hash_undefweak)
4267 {
4268 const char *name;
4269
4270 /* Use undefined class. Also, set class and type for some
4271 special symbols. */
4272 name = h->root.root.root.string;
4273 if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0
4274 || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0)
4275 {
4276 h->esym.asym.sc = scData;
4277 h->esym.asym.st = stLabel;
4278 h->esym.asym.value = 0;
4279 }
4280 else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0)
4281 {
4282 h->esym.asym.sc = scAbs;
4283 h->esym.asym.st = stLabel;
4284 h->esym.asym.value =
4285 mips_elf_hash_table (einfo->info)->procedure_count;
4286 }
4287 else if (strcmp (name, "_gp_disp") == 0)
4288 {
4289 h->esym.asym.sc = scAbs;
4290 h->esym.asym.st = stLabel;
4291 h->esym.asym.value = elf_gp (einfo->abfd);
4292 }
4293 else
4294 h->esym.asym.sc = scUndefined;
4295 }
4296 else if (h->root.root.type != bfd_link_hash_defined
4297 && h->root.root.type != bfd_link_hash_defweak)
4298 h->esym.asym.sc = scAbs;
4299 else
4300 {
4301 const char *name;
4302
4303 sec = h->root.root.u.def.section;
4304 output_section = sec->output_section;
4305
4306 /* When making a shared library and symbol h is the one from
4307 the another shared library, OUTPUT_SECTION may be null. */
4308 if (output_section == NULL)
4309 h->esym.asym.sc = scUndefined;
4310 else
4311 {
4312 name = bfd_section_name (output_section->owner, output_section);
4313
4314 if (strcmp (name, ".text") == 0)
4315 h->esym.asym.sc = scText;
4316 else if (strcmp (name, ".data") == 0)
4317 h->esym.asym.sc = scData;
4318 else if (strcmp (name, ".sdata") == 0)
4319 h->esym.asym.sc = scSData;
4320 else if (strcmp (name, ".rodata") == 0
4321 || strcmp (name, ".rdata") == 0)
4322 h->esym.asym.sc = scRData;
4323 else if (strcmp (name, ".bss") == 0)
4324 h->esym.asym.sc = scBss;
4325 else if (strcmp (name, ".sbss") == 0)
4326 h->esym.asym.sc = scSBss;
4327 else if (strcmp (name, ".init") == 0)
4328 h->esym.asym.sc = scInit;
4329 else if (strcmp (name, ".fini") == 0)
4330 h->esym.asym.sc = scFini;
4331 else
4332 h->esym.asym.sc = scAbs;
4333 }
4334 }
4335
4336 h->esym.asym.reserved = 0;
4337 h->esym.asym.index = indexNil;
4338 }
4339
4340 if (h->root.root.type == bfd_link_hash_common)
4341 h->esym.asym.value = h->root.root.u.c.size;
4342 else if (h->root.root.type == bfd_link_hash_defined
4343 || h->root.root.type == bfd_link_hash_defweak)
4344 {
4345 if (h->esym.asym.sc == scCommon)
4346 h->esym.asym.sc = scBss;
4347 else if (h->esym.asym.sc == scSCommon)
4348 h->esym.asym.sc = scSBss;
4349
4350 sec = h->root.root.u.def.section;
4351 output_section = sec->output_section;
4352 if (output_section != NULL)
4353 h->esym.asym.value = (h->root.root.u.def.value
4354 + sec->output_offset
4355 + output_section->vma);
4356 else
4357 h->esym.asym.value = 0;
4358 }
4359 else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4360 {
4361 struct mips_elf_link_hash_entry *hd = h;
4362 boolean no_fn_stub = h->no_fn_stub;
4363
4364 while (hd->root.root.type == bfd_link_hash_indirect)
4365 {
4366 hd = (struct mips_elf_link_hash_entry *)h->root.root.u.i.link;
4367 no_fn_stub = no_fn_stub || hd->no_fn_stub;
4368 }
4369
4370 if (!no_fn_stub)
4371 {
4372 /* Set type and value for a symbol with a function stub. */
4373 h->esym.asym.st = stProc;
4374 sec = hd->root.root.u.def.section;
4375 if (sec == NULL)
4376 h->esym.asym.value = 0;
4377 else
4378 {
4379 output_section = sec->output_section;
4380 if (output_section != NULL)
4381 h->esym.asym.value = (hd->root.plt.offset
4382 + sec->output_offset
4383 + output_section->vma);
4384 else
4385 h->esym.asym.value = 0;
4386 }
4387 #if 0 /* FIXME? */
4388 h->esym.ifd = 0;
4389 #endif
4390 }
4391 }
4392
4393 if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
4394 h->root.root.root.string,
4395 &h->esym))
4396 {
4397 einfo->failed = true;
4398 return false;
4399 }
4400
4401 return true;
4402 }
4403
4404 /* Create a runtime procedure table from the .mdebug section. */
4405
4406 static boolean
4407 mips_elf_create_procedure_table (handle, abfd, info, s, debug)
4408 PTR handle;
4409 bfd *abfd;
4410 struct bfd_link_info *info;
4411 asection *s;
4412 struct ecoff_debug_info *debug;
4413 {
4414 const struct ecoff_debug_swap *swap;
4415 HDRR *hdr = &debug->symbolic_header;
4416 RPDR *rpdr, *rp;
4417 struct rpdr_ext *erp;
4418 PTR rtproc;
4419 struct pdr_ext *epdr;
4420 struct sym_ext *esym;
4421 char *ss, **sv;
4422 char *str;
4423 bfd_size_type size;
4424 bfd_size_type count;
4425 unsigned long sindex;
4426 unsigned long i;
4427 PDR pdr;
4428 SYMR sym;
4429 const char *no_name_func = _("static procedure (no name)");
4430
4431 epdr = NULL;
4432 rpdr = NULL;
4433 esym = NULL;
4434 ss = NULL;
4435 sv = NULL;
4436
4437 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
4438
4439 sindex = strlen (no_name_func) + 1;
4440 count = hdr->ipdMax;
4441 if (count > 0)
4442 {
4443 size = swap->external_pdr_size;
4444
4445 epdr = (struct pdr_ext *) bfd_malloc (size * count);
4446 if (epdr == NULL)
4447 goto error_return;
4448
4449 if (! _bfd_ecoff_get_accumulated_pdr (handle, (PTR) epdr))
4450 goto error_return;
4451
4452 size = sizeof (RPDR);
4453 rp = rpdr = (RPDR *) bfd_malloc (size * count);
4454 if (rpdr == NULL)
4455 goto error_return;
4456
4457 size = sizeof (char *);
4458 sv = (char **) bfd_malloc (size * count);
4459 if (sv == NULL)
4460 goto error_return;
4461
4462 count = hdr->isymMax;
4463 size = swap->external_sym_size;
4464 esym = (struct sym_ext *) bfd_malloc (size * count);
4465 if (esym == NULL)
4466 goto error_return;
4467
4468 if (! _bfd_ecoff_get_accumulated_sym (handle, (PTR) esym))
4469 goto error_return;
4470
4471 count = hdr->issMax;
4472 ss = (char *) bfd_malloc (count);
4473 if (ss == NULL)
4474 goto error_return;
4475 if (! _bfd_ecoff_get_accumulated_ss (handle, (PTR) ss))
4476 goto error_return;
4477
4478 count = hdr->ipdMax;
4479 for (i = 0; i < (unsigned long) count; i++, rp++)
4480 {
4481 (*swap->swap_pdr_in) (abfd, (PTR) (epdr + i), &pdr);
4482 (*swap->swap_sym_in) (abfd, (PTR) &esym[pdr.isym], &sym);
4483 rp->adr = sym.value;
4484 rp->regmask = pdr.regmask;
4485 rp->regoffset = pdr.regoffset;
4486 rp->fregmask = pdr.fregmask;
4487 rp->fregoffset = pdr.fregoffset;
4488 rp->frameoffset = pdr.frameoffset;
4489 rp->framereg = pdr.framereg;
4490 rp->pcreg = pdr.pcreg;
4491 rp->irpss = sindex;
4492 sv[i] = ss + sym.iss;
4493 sindex += strlen (sv[i]) + 1;
4494 }
4495 }
4496
4497 size = sizeof (struct rpdr_ext) * (count + 2) + sindex;
4498 size = BFD_ALIGN (size, 16);
4499 rtproc = (PTR) bfd_alloc (abfd, size);
4500 if (rtproc == NULL)
4501 {
4502 mips_elf_hash_table (info)->procedure_count = 0;
4503 goto error_return;
4504 }
4505
4506 mips_elf_hash_table (info)->procedure_count = count + 2;
4507
4508 erp = (struct rpdr_ext *) rtproc;
4509 memset (erp, 0, sizeof (struct rpdr_ext));
4510 erp++;
4511 str = (char *) rtproc + sizeof (struct rpdr_ext) * (count + 2);
4512 strcpy (str, no_name_func);
4513 str += strlen (no_name_func) + 1;
4514 for (i = 0; i < count; i++)
4515 {
4516 ecoff_swap_rpdr_out (abfd, rpdr + i, erp + i);
4517 strcpy (str, sv[i]);
4518 str += strlen (sv[i]) + 1;
4519 }
4520 ECOFF_PUT_OFF (abfd, -1, (erp + count)->p_adr);
4521
4522 /* Set the size and contents of .rtproc section. */
4523 s->_raw_size = size;
4524 s->contents = (bfd_byte *) rtproc;
4525
4526 /* Skip this section later on (I don't think this currently
4527 matters, but someday it might). */
4528 s->link_order_head = (struct bfd_link_order *) NULL;
4529
4530 if (epdr != NULL)
4531 free (epdr);
4532 if (rpdr != NULL)
4533 free (rpdr);
4534 if (esym != NULL)
4535 free (esym);
4536 if (ss != NULL)
4537 free (ss);
4538 if (sv != NULL)
4539 free (sv);
4540
4541 return true;
4542
4543 error_return:
4544 if (epdr != NULL)
4545 free (epdr);
4546 if (rpdr != NULL)
4547 free (rpdr);
4548 if (esym != NULL)
4549 free (esym);
4550 if (ss != NULL)
4551 free (ss);
4552 if (sv != NULL)
4553 free (sv);
4554 return false;
4555 }
4556
4557 /* A comparison routine used to sort .gptab entries. */
4558
4559 static int
4560 gptab_compare (p1, p2)
4561 const PTR p1;
4562 const PTR p2;
4563 {
4564 const Elf32_gptab *a1 = (const Elf32_gptab *) p1;
4565 const Elf32_gptab *a2 = (const Elf32_gptab *) p2;
4566
4567 return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value;
4568 }
4569
4570 /* We need to use a special link routine to handle the .reginfo and
4571 the .mdebug sections. We need to merge all instances of these
4572 sections together, not write them all out sequentially. */
4573
4574 boolean
4575 _bfd_mips_elf_final_link (abfd, info)
4576 bfd *abfd;
4577 struct bfd_link_info *info;
4578 {
4579 asection **secpp;
4580 asection *o;
4581 struct bfd_link_order *p;
4582 asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec;
4583 asection *rtproc_sec;
4584 Elf32_RegInfo reginfo;
4585 struct ecoff_debug_info debug;
4586 const struct ecoff_debug_swap *swap
4587 = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
4588 HDRR *symhdr = &debug.symbolic_header;
4589 PTR mdebug_handle = NULL;
4590 asection *s;
4591 EXTR esym;
4592 unsigned int i;
4593 bfd_size_type amt;
4594
4595 static const char * const secname[] =
4596 {
4597 ".text", ".init", ".fini", ".data",
4598 ".rodata", ".sdata", ".sbss", ".bss"
4599 };
4600 static const int sc[] =
4601 {
4602 scText, scInit, scFini, scData,
4603 scRData, scSData, scSBss, scBss
4604 };
4605
4606 /* If all the things we linked together were PIC, but we're
4607 producing an executable (rather than a shared object), then the
4608 resulting file is CPIC (i.e., it calls PIC code.) */
4609 if (!info->shared
4610 && !info->relocateable
4611 && elf_elfheader (abfd)->e_flags & EF_MIPS_PIC)
4612 {
4613 elf_elfheader (abfd)->e_flags &= ~EF_MIPS_PIC;
4614 elf_elfheader (abfd)->e_flags |= EF_MIPS_CPIC;
4615 }
4616
4617 /* We'd carefully arranged the dynamic symbol indices, and then the
4618 generic size_dynamic_sections renumbered them out from under us.
4619 Rather than trying somehow to prevent the renumbering, just do
4620 the sort again. */
4621 if (elf_hash_table (info)->dynamic_sections_created)
4622 {
4623 bfd *dynobj;
4624 asection *got;
4625 struct mips_got_info *g;
4626
4627 /* When we resort, we must tell mips_elf_sort_hash_table what
4628 the lowest index it may use is. That's the number of section
4629 symbols we're going to add. The generic ELF linker only
4630 adds these symbols when building a shared object. Note that
4631 we count the sections after (possibly) removing the .options
4632 section above. */
4633 if (!mips_elf_sort_hash_table (info, (info->shared
4634 ? bfd_count_sections (abfd) + 1
4635 : 1)))
4636 return false;
4637
4638 /* Make sure we didn't grow the global .got region. */
4639 dynobj = elf_hash_table (info)->dynobj;
4640 got = bfd_get_section_by_name (dynobj, ".got");
4641 g = (struct mips_got_info *) elf_section_data (got)->tdata;
4642
4643 if (g->global_gotsym != NULL)
4644 BFD_ASSERT ((elf_hash_table (info)->dynsymcount
4645 - g->global_gotsym->dynindx)
4646 <= g->global_gotno);
4647 }
4648
4649 /* On IRIX5, we omit the .options section. On IRIX6, however, we
4650 include it, even though we don't process it quite right. (Some
4651 entries are supposed to be merged.) Empirically, we seem to be
4652 better off including it then not. */
4653 if (IRIX_COMPAT (abfd) == ict_irix5 || IRIX_COMPAT (abfd) == ict_none)
4654 for (secpp = &abfd->sections; *secpp != NULL; secpp = &(*secpp)->next)
4655 {
4656 if (strcmp ((*secpp)->name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0)
4657 {
4658 for (p = (*secpp)->link_order_head; p != NULL; p = p->next)
4659 if (p->type == bfd_indirect_link_order)
4660 p->u.indirect.section->flags &= ~SEC_HAS_CONTENTS;
4661 (*secpp)->link_order_head = NULL;
4662 *secpp = (*secpp)->next;
4663 --abfd->section_count;
4664
4665 break;
4666 }
4667 }
4668
4669 /* Get a value for the GP register. */
4670 if (elf_gp (abfd) == 0)
4671 {
4672 struct bfd_link_hash_entry *h;
4673
4674 h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true);
4675 if (h != (struct bfd_link_hash_entry *) NULL
4676 && h->type == bfd_link_hash_defined)
4677 elf_gp (abfd) = (h->u.def.value
4678 + h->u.def.section->output_section->vma
4679 + h->u.def.section->output_offset);
4680 else if (info->relocateable)
4681 {
4682 bfd_vma lo;
4683
4684 /* Find the GP-relative section with the lowest offset. */
4685 lo = (bfd_vma) -1;
4686 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
4687 if (o->vma < lo
4688 && (elf_section_data (o)->this_hdr.sh_flags & SHF_MIPS_GPREL))
4689 lo = o->vma;
4690
4691 /* And calculate GP relative to that. */
4692 elf_gp (abfd) = lo + ELF_MIPS_GP_OFFSET (abfd);
4693 }
4694 else
4695 {
4696 /* If the relocate_section function needs to do a reloc
4697 involving the GP value, it should make a reloc_dangerous
4698 callback to warn that GP is not defined. */
4699 }
4700 }
4701
4702 /* Go through the sections and collect the .reginfo and .mdebug
4703 information. */
4704 reginfo_sec = NULL;
4705 mdebug_sec = NULL;
4706 gptab_data_sec = NULL;
4707 gptab_bss_sec = NULL;
4708 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
4709 {
4710 if (strcmp (o->name, ".reginfo") == 0)
4711 {
4712 memset (&reginfo, 0, sizeof reginfo);
4713
4714 /* We have found the .reginfo section in the output file.
4715 Look through all the link_orders comprising it and merge
4716 the information together. */
4717 for (p = o->link_order_head;
4718 p != (struct bfd_link_order *) NULL;
4719 p = p->next)
4720 {
4721 asection *input_section;
4722 bfd *input_bfd;
4723 Elf32_External_RegInfo ext;
4724 Elf32_RegInfo sub;
4725
4726 if (p->type != bfd_indirect_link_order)
4727 {
4728 if (p->type == bfd_fill_link_order)
4729 continue;
4730 abort ();
4731 }
4732
4733 input_section = p->u.indirect.section;
4734 input_bfd = input_section->owner;
4735
4736 /* The linker emulation code has probably clobbered the
4737 size to be zero bytes. */
4738 if (input_section->_raw_size == 0)
4739 input_section->_raw_size = sizeof (Elf32_External_RegInfo);
4740
4741 if (! bfd_get_section_contents (input_bfd, input_section,
4742 (PTR) &ext,
4743 (file_ptr) 0,
4744 (bfd_size_type) sizeof ext))
4745 return false;
4746
4747 bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub);
4748
4749 reginfo.ri_gprmask |= sub.ri_gprmask;
4750 reginfo.ri_cprmask[0] |= sub.ri_cprmask[0];
4751 reginfo.ri_cprmask[1] |= sub.ri_cprmask[1];
4752 reginfo.ri_cprmask[2] |= sub.ri_cprmask[2];
4753 reginfo.ri_cprmask[3] |= sub.ri_cprmask[3];
4754
4755 /* ri_gp_value is set by the function
4756 mips_elf32_section_processing when the section is
4757 finally written out. */
4758
4759 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4760 elf_link_input_bfd ignores this section. */
4761 input_section->flags &= ~SEC_HAS_CONTENTS;
4762 }
4763
4764 /* Size has been set in mips_elf_always_size_sections */
4765 BFD_ASSERT(o->_raw_size == sizeof (Elf32_External_RegInfo));
4766
4767 /* Skip this section later on (I don't think this currently
4768 matters, but someday it might). */
4769 o->link_order_head = (struct bfd_link_order *) NULL;
4770
4771 reginfo_sec = o;
4772 }
4773
4774 if (strcmp (o->name, ".mdebug") == 0)
4775 {
4776 struct extsym_info einfo;
4777 bfd_vma last;
4778
4779 /* We have found the .mdebug section in the output file.
4780 Look through all the link_orders comprising it and merge
4781 the information together. */
4782 symhdr->magic = swap->sym_magic;
4783 /* FIXME: What should the version stamp be? */
4784 symhdr->vstamp = 0;
4785 symhdr->ilineMax = 0;
4786 symhdr->cbLine = 0;
4787 symhdr->idnMax = 0;
4788 symhdr->ipdMax = 0;
4789 symhdr->isymMax = 0;
4790 symhdr->ioptMax = 0;
4791 symhdr->iauxMax = 0;
4792 symhdr->issMax = 0;
4793 symhdr->issExtMax = 0;
4794 symhdr->ifdMax = 0;
4795 symhdr->crfd = 0;
4796 symhdr->iextMax = 0;
4797
4798 /* We accumulate the debugging information itself in the
4799 debug_info structure. */
4800 debug.line = NULL;
4801 debug.external_dnr = NULL;
4802 debug.external_pdr = NULL;
4803 debug.external_sym = NULL;
4804 debug.external_opt = NULL;
4805 debug.external_aux = NULL;
4806 debug.ss = NULL;
4807 debug.ssext = debug.ssext_end = NULL;
4808 debug.external_fdr = NULL;
4809 debug.external_rfd = NULL;
4810 debug.external_ext = debug.external_ext_end = NULL;
4811
4812 mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
4813 if (mdebug_handle == (PTR) NULL)
4814 return false;
4815
4816 esym.jmptbl = 0;
4817 esym.cobol_main = 0;
4818 esym.weakext = 0;
4819 esym.reserved = 0;
4820 esym.ifd = ifdNil;
4821 esym.asym.iss = issNil;
4822 esym.asym.st = stLocal;
4823 esym.asym.reserved = 0;
4824 esym.asym.index = indexNil;
4825 last = 0;
4826 for (i = 0; i < sizeof (secname) / sizeof (secname[0]); i++)
4827 {
4828 esym.asym.sc = sc[i];
4829 s = bfd_get_section_by_name (abfd, secname[i]);
4830 if (s != NULL)
4831 {
4832 esym.asym.value = s->vma;
4833 last = s->vma + s->_raw_size;
4834 }
4835 else
4836 esym.asym.value = last;
4837 if (!bfd_ecoff_debug_one_external (abfd, &debug, swap,
4838 secname[i], &esym))
4839 return false;
4840 }
4841
4842 for (p = o->link_order_head;
4843 p != (struct bfd_link_order *) NULL;
4844 p = p->next)
4845 {
4846 asection *input_section;
4847 bfd *input_bfd;
4848 const struct ecoff_debug_swap *input_swap;
4849 struct ecoff_debug_info input_debug;
4850 char *eraw_src;
4851 char *eraw_end;
4852
4853 if (p->type != bfd_indirect_link_order)
4854 {
4855 if (p->type == bfd_fill_link_order)
4856 continue;
4857 abort ();
4858 }
4859
4860 input_section = p->u.indirect.section;
4861 input_bfd = input_section->owner;
4862
4863 if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
4864 || (get_elf_backend_data (input_bfd)
4865 ->elf_backend_ecoff_debug_swap) == NULL)
4866 {
4867 /* I don't know what a non MIPS ELF bfd would be
4868 doing with a .mdebug section, but I don't really
4869 want to deal with it. */
4870 continue;
4871 }
4872
4873 input_swap = (get_elf_backend_data (input_bfd)
4874 ->elf_backend_ecoff_debug_swap);
4875
4876 BFD_ASSERT (p->size == input_section->_raw_size);
4877
4878 /* The ECOFF linking code expects that we have already
4879 read in the debugging information and set up an
4880 ecoff_debug_info structure, so we do that now. */
4881 if (! _bfd_mips_elf_read_ecoff_info (input_bfd, input_section,
4882 &input_debug))
4883 return false;
4884
4885 if (! (bfd_ecoff_debug_accumulate
4886 (mdebug_handle, abfd, &debug, swap, input_bfd,
4887 &input_debug, input_swap, info)))
4888 return false;
4889
4890 /* Loop through the external symbols. For each one with
4891 interesting information, try to find the symbol in
4892 the linker global hash table and save the information
4893 for the output external symbols. */
4894 eraw_src = input_debug.external_ext;
4895 eraw_end = (eraw_src
4896 + (input_debug.symbolic_header.iextMax
4897 * input_swap->external_ext_size));
4898 for (;
4899 eraw_src < eraw_end;
4900 eraw_src += input_swap->external_ext_size)
4901 {
4902 EXTR ext;
4903 const char *name;
4904 struct mips_elf_link_hash_entry *h;
4905
4906 (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
4907 if (ext.asym.sc == scNil
4908 || ext.asym.sc == scUndefined
4909 || ext.asym.sc == scSUndefined)
4910 continue;
4911
4912 name = input_debug.ssext + ext.asym.iss;
4913 h = mips_elf_link_hash_lookup (mips_elf_hash_table (info),
4914 name, false, false, true);
4915 if (h == NULL || h->esym.ifd != -2)
4916 continue;
4917
4918 if (ext.ifd != -1)
4919 {
4920 BFD_ASSERT (ext.ifd
4921 < input_debug.symbolic_header.ifdMax);
4922 ext.ifd = input_debug.ifdmap[ext.ifd];
4923 }
4924
4925 h->esym = ext;
4926 }
4927
4928 /* Free up the information we just read. */
4929 free (input_debug.line);
4930 free (input_debug.external_dnr);
4931 free (input_debug.external_pdr);
4932 free (input_debug.external_sym);
4933 free (input_debug.external_opt);
4934 free (input_debug.external_aux);
4935 free (input_debug.ss);
4936 free (input_debug.ssext);
4937 free (input_debug.external_fdr);
4938 free (input_debug.external_rfd);
4939 free (input_debug.external_ext);
4940
4941 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4942 elf_link_input_bfd ignores this section. */
4943 input_section->flags &= ~SEC_HAS_CONTENTS;
4944 }
4945
4946 if (SGI_COMPAT (abfd) && info->shared)
4947 {
4948 /* Create .rtproc section. */
4949 rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc");
4950 if (rtproc_sec == NULL)
4951 {
4952 flagword flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
4953 | SEC_LINKER_CREATED | SEC_READONLY);
4954
4955 rtproc_sec = bfd_make_section (abfd, ".rtproc");
4956 if (rtproc_sec == NULL
4957 || ! bfd_set_section_flags (abfd, rtproc_sec, flags)
4958 || ! bfd_set_section_alignment (abfd, rtproc_sec, 4))
4959 return false;
4960 }
4961
4962 if (! mips_elf_create_procedure_table (mdebug_handle, abfd,
4963 info, rtproc_sec, &debug))
4964 return false;
4965 }
4966
4967 /* Build the external symbol information. */
4968 einfo.abfd = abfd;
4969 einfo.info = info;
4970 einfo.debug = &debug;
4971 einfo.swap = swap;
4972 einfo.failed = false;
4973 mips_elf_link_hash_traverse (mips_elf_hash_table (info),
4974 mips_elf_output_extsym,
4975 (PTR) &einfo);
4976 if (einfo.failed)
4977 return false;
4978
4979 /* Set the size of the .mdebug section. */
4980 o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
4981
4982 /* Skip this section later on (I don't think this currently
4983 matters, but someday it might). */
4984 o->link_order_head = (struct bfd_link_order *) NULL;
4985
4986 mdebug_sec = o;
4987 }
4988
4989 if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0)
4990 {
4991 const char *subname;
4992 unsigned int c;
4993 Elf32_gptab *tab;
4994 Elf32_External_gptab *ext_tab;
4995 unsigned int j;
4996
4997 /* The .gptab.sdata and .gptab.sbss sections hold
4998 information describing how the small data area would
4999 change depending upon the -G switch. These sections
5000 not used in executables files. */
5001 if (! info->relocateable)
5002 {
5003 for (p = o->link_order_head;
5004 p != (struct bfd_link_order *) NULL;
5005 p = p->next)
5006 {
5007 asection *input_section;
5008
5009 if (p->type != bfd_indirect_link_order)
5010 {
5011 if (p->type == bfd_fill_link_order)
5012 continue;
5013 abort ();
5014 }
5015
5016 input_section = p->u.indirect.section;
5017
5018 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5019 elf_link_input_bfd ignores this section. */
5020 input_section->flags &= ~SEC_HAS_CONTENTS;
5021 }
5022
5023 /* Skip this section later on (I don't think this
5024 currently matters, but someday it might). */
5025 o->link_order_head = (struct bfd_link_order *) NULL;
5026
5027 /* Really remove the section. */
5028 for (secpp = &abfd->sections;
5029 *secpp != o;
5030 secpp = &(*secpp)->next)
5031 ;
5032 *secpp = (*secpp)->next;
5033 --abfd->section_count;
5034
5035 continue;
5036 }
5037
5038 /* There is one gptab for initialized data, and one for
5039 uninitialized data. */
5040 if (strcmp (o->name, ".gptab.sdata") == 0)
5041 gptab_data_sec = o;
5042 else if (strcmp (o->name, ".gptab.sbss") == 0)
5043 gptab_bss_sec = o;
5044 else
5045 {
5046 (*_bfd_error_handler)
5047 (_("%s: illegal section name `%s'"),
5048 bfd_get_filename (abfd), o->name);
5049 bfd_set_error (bfd_error_nonrepresentable_section);
5050 return false;
5051 }
5052
5053 /* The linker script always combines .gptab.data and
5054 .gptab.sdata into .gptab.sdata, and likewise for
5055 .gptab.bss and .gptab.sbss. It is possible that there is
5056 no .sdata or .sbss section in the output file, in which
5057 case we must change the name of the output section. */
5058 subname = o->name + sizeof ".gptab" - 1;
5059 if (bfd_get_section_by_name (abfd, subname) == NULL)
5060 {
5061 if (o == gptab_data_sec)
5062 o->name = ".gptab.data";
5063 else
5064 o->name = ".gptab.bss";
5065 subname = o->name + sizeof ".gptab" - 1;
5066 BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL);
5067 }
5068
5069 /* Set up the first entry. */
5070 c = 1;
5071 amt = c * sizeof (Elf32_gptab);
5072 tab = (Elf32_gptab *) bfd_malloc (amt);
5073 if (tab == NULL)
5074 return false;
5075 tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd);
5076 tab[0].gt_header.gt_unused = 0;
5077
5078 /* Combine the input sections. */
5079 for (p = o->link_order_head;
5080 p != (struct bfd_link_order *) NULL;
5081 p = p->next)
5082 {
5083 asection *input_section;
5084 bfd *input_bfd;
5085 bfd_size_type size;
5086 unsigned long last;
5087 bfd_size_type gpentry;
5088
5089 if (p->type != bfd_indirect_link_order)
5090 {
5091 if (p->type == bfd_fill_link_order)
5092 continue;
5093 abort ();
5094 }
5095
5096 input_section = p->u.indirect.section;
5097 input_bfd = input_section->owner;
5098
5099 /* Combine the gptab entries for this input section one
5100 by one. We know that the input gptab entries are
5101 sorted by ascending -G value. */
5102 size = bfd_section_size (input_bfd, input_section);
5103 last = 0;
5104 for (gpentry = sizeof (Elf32_External_gptab);
5105 gpentry < size;
5106 gpentry += sizeof (Elf32_External_gptab))
5107 {
5108 Elf32_External_gptab ext_gptab;
5109 Elf32_gptab int_gptab;
5110 unsigned long val;
5111 unsigned long add;
5112 boolean exact;
5113 unsigned int look;
5114
5115 if (! (bfd_get_section_contents
5116 (input_bfd, input_section, (PTR) &ext_gptab,
5117 (file_ptr) gpentry,
5118 (bfd_size_type) sizeof (Elf32_External_gptab))))
5119 {
5120 free (tab);
5121 return false;
5122 }
5123
5124 bfd_mips_elf32_swap_gptab_in (input_bfd, &ext_gptab,
5125 &int_gptab);
5126 val = int_gptab.gt_entry.gt_g_value;
5127 add = int_gptab.gt_entry.gt_bytes - last;
5128
5129 exact = false;
5130 for (look = 1; look < c; look++)
5131 {
5132 if (tab[look].gt_entry.gt_g_value >= val)
5133 tab[look].gt_entry.gt_bytes += add;
5134
5135 if (tab[look].gt_entry.gt_g_value == val)
5136 exact = true;
5137 }
5138
5139 if (! exact)
5140 {
5141 Elf32_gptab *new_tab;
5142 unsigned int max;
5143
5144 /* We need a new table entry. */
5145 amt = (bfd_size_type) (c + 1) * sizeof (Elf32_gptab);
5146 new_tab = (Elf32_gptab *) bfd_realloc ((PTR) tab, amt);
5147 if (new_tab == NULL)
5148 {
5149 free (tab);
5150 return false;
5151 }
5152 tab = new_tab;
5153 tab[c].gt_entry.gt_g_value = val;
5154 tab[c].gt_entry.gt_bytes = add;
5155
5156 /* Merge in the size for the next smallest -G
5157 value, since that will be implied by this new
5158 value. */
5159 max = 0;
5160 for (look = 1; look < c; look++)
5161 {
5162 if (tab[look].gt_entry.gt_g_value < val
5163 && (max == 0
5164 || (tab[look].gt_entry.gt_g_value
5165 > tab[max].gt_entry.gt_g_value)))
5166 max = look;
5167 }
5168 if (max != 0)
5169 tab[c].gt_entry.gt_bytes +=
5170 tab[max].gt_entry.gt_bytes;
5171
5172 ++c;
5173 }
5174
5175 last = int_gptab.gt_entry.gt_bytes;
5176 }
5177
5178 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5179 elf_link_input_bfd ignores this section. */
5180 input_section->flags &= ~SEC_HAS_CONTENTS;
5181 }
5182
5183 /* The table must be sorted by -G value. */
5184 if (c > 2)
5185 qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare);
5186
5187 /* Swap out the table. */
5188 amt = (bfd_size_type) c * sizeof (Elf32_External_gptab);
5189 ext_tab = (Elf32_External_gptab *) bfd_alloc (abfd, amt);
5190 if (ext_tab == NULL)
5191 {
5192 free (tab);
5193 return false;
5194 }
5195
5196 for (j = 0; j < c; j++)
5197 bfd_mips_elf32_swap_gptab_out (abfd, tab + j, ext_tab + j);
5198 free (tab);
5199
5200 o->_raw_size = c * sizeof (Elf32_External_gptab);
5201 o->contents = (bfd_byte *) ext_tab;
5202
5203 /* Skip this section later on (I don't think this currently
5204 matters, but someday it might). */
5205 o->link_order_head = (struct bfd_link_order *) NULL;
5206 }
5207 }
5208
5209 /* Invoke the regular ELF backend linker to do all the work. */
5210 if (ABI_64_P (abfd))
5211 {
5212 #ifdef BFD64
5213 if (!bfd_elf64_bfd_final_link (abfd, info))
5214 return false;
5215 #else
5216 abort ();
5217 return false;
5218 #endif /* BFD64 */
5219 }
5220 else if (!bfd_elf32_bfd_final_link (abfd, info))
5221 return false;
5222
5223 /* Now write out the computed sections. */
5224
5225 if (reginfo_sec != (asection *) NULL)
5226 {
5227 Elf32_External_RegInfo ext;
5228
5229 bfd_mips_elf32_swap_reginfo_out (abfd, &reginfo, &ext);
5230 if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext,
5231 (file_ptr) 0, (bfd_size_type) sizeof ext))
5232 return false;
5233 }
5234
5235 if (mdebug_sec != (asection *) NULL)
5236 {
5237 BFD_ASSERT (abfd->output_has_begun);
5238 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
5239 swap, info,
5240 mdebug_sec->filepos))
5241 return false;
5242
5243 bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
5244 }
5245
5246 if (gptab_data_sec != (asection *) NULL)
5247 {
5248 if (! bfd_set_section_contents (abfd, gptab_data_sec,
5249 gptab_data_sec->contents,
5250 (file_ptr) 0,
5251 gptab_data_sec->_raw_size))
5252 return false;
5253 }
5254
5255 if (gptab_bss_sec != (asection *) NULL)
5256 {
5257 if (! bfd_set_section_contents (abfd, gptab_bss_sec,
5258 gptab_bss_sec->contents,
5259 (file_ptr) 0,
5260 gptab_bss_sec->_raw_size))
5261 return false;
5262 }
5263
5264 if (SGI_COMPAT (abfd))
5265 {
5266 rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc");
5267 if (rtproc_sec != NULL)
5268 {
5269 if (! bfd_set_section_contents (abfd, rtproc_sec,
5270 rtproc_sec->contents,
5271 (file_ptr) 0,
5272 rtproc_sec->_raw_size))
5273 return false;
5274 }
5275 }
5276
5277 return true;
5278 }
5279
5280 /* This function is called via qsort() to sort the dynamic relocation
5281 entries by increasing r_symndx value. */
5282
5283 static int
5284 sort_dynamic_relocs (arg1, arg2)
5285 const PTR arg1;
5286 const PTR arg2;
5287 {
5288 const Elf32_External_Rel *ext_reloc1 = (const Elf32_External_Rel *) arg1;
5289 const Elf32_External_Rel *ext_reloc2 = (const Elf32_External_Rel *) arg2;
5290
5291 Elf_Internal_Rel int_reloc1;
5292 Elf_Internal_Rel int_reloc2;
5293
5294 bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, ext_reloc1, &int_reloc1);
5295 bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, ext_reloc2, &int_reloc2);
5296
5297 return (ELF32_R_SYM (int_reloc1.r_info) - ELF32_R_SYM (int_reloc2.r_info));
5298 }
5299
5300 /* Returns the GOT section for ABFD. */
5301
5302 static asection *
5303 mips_elf_got_section (abfd)
5304 bfd *abfd;
5305 {
5306 return bfd_get_section_by_name (abfd, ".got");
5307 }
5308
5309 /* Returns the GOT information associated with the link indicated by
5310 INFO. If SGOTP is non-NULL, it is filled in with the GOT
5311 section. */
5312
5313 static struct mips_got_info *
5314 mips_elf_got_info (abfd, sgotp)
5315 bfd *abfd;
5316 asection **sgotp;
5317 {
5318 asection *sgot;
5319 struct mips_got_info *g;
5320
5321 sgot = mips_elf_got_section (abfd);
5322 BFD_ASSERT (sgot != NULL);
5323 BFD_ASSERT (elf_section_data (sgot) != NULL);
5324 g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
5325 BFD_ASSERT (g != NULL);
5326
5327 if (sgotp)
5328 *sgotp = sgot;
5329 return g;
5330 }
5331
5332 /* Return whether a relocation is against a local symbol. */
5333
5334 static boolean
5335 mips_elf_local_relocation_p (input_bfd, relocation, local_sections,
5336 check_forced)
5337 bfd *input_bfd;
5338 const Elf_Internal_Rela *relocation;
5339 asection **local_sections;
5340 boolean check_forced;
5341 {
5342 unsigned long r_symndx;
5343 Elf_Internal_Shdr *symtab_hdr;
5344 struct mips_elf_link_hash_entry *h;
5345 size_t extsymoff;
5346
5347 r_symndx = ELF32_R_SYM (relocation->r_info);
5348 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5349 extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info;
5350
5351 if (r_symndx < extsymoff)
5352 return true;
5353 if (elf_bad_symtab (input_bfd) && local_sections[r_symndx] != NULL)
5354 return true;
5355
5356 if (check_forced)
5357 {
5358 /* Look up the hash table to check whether the symbol
5359 was forced local. */
5360 h = (struct mips_elf_link_hash_entry *)
5361 elf_sym_hashes (input_bfd) [r_symndx - extsymoff];
5362 /* Find the real hash-table entry for this symbol. */
5363 while (h->root.root.type == bfd_link_hash_indirect
5364 || h->root.root.type == bfd_link_hash_warning)
5365 h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link;
5366 if ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
5367 return true;
5368 }
5369
5370 return false;
5371 }
5372
5373 /* Sign-extend VALUE, which has the indicated number of BITS. */
5374
5375 static bfd_vma
5376 mips_elf_sign_extend (value, bits)
5377 bfd_vma value;
5378 int bits;
5379 {
5380 if (value & ((bfd_vma) 1 << (bits - 1)))
5381 /* VALUE is negative. */
5382 value |= ((bfd_vma) - 1) << bits;
5383
5384 return value;
5385 }
5386
5387 /* Return non-zero if the indicated VALUE has overflowed the maximum
5388 range expressable by a signed number with the indicated number of
5389 BITS. */
5390
5391 static boolean
5392 mips_elf_overflow_p (value, bits)
5393 bfd_vma value;
5394 int bits;
5395 {
5396 bfd_signed_vma svalue = (bfd_signed_vma) value;
5397
5398 if (svalue > (1 << (bits - 1)) - 1)
5399 /* The value is too big. */
5400 return true;
5401 else if (svalue < -(1 << (bits - 1)))
5402 /* The value is too small. */
5403 return true;
5404
5405 /* All is well. */
5406 return false;
5407 }
5408
5409 /* Calculate the %high function. */
5410
5411 static bfd_vma
5412 mips_elf_high (value)
5413 bfd_vma value;
5414 {
5415 return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff;
5416 }
5417
5418 /* Calculate the %higher function. */
5419
5420 static bfd_vma
5421 mips_elf_higher (value)
5422 bfd_vma value ATTRIBUTE_UNUSED;
5423 {
5424 #ifdef BFD64
5425 return ((value + (bfd_vma) 0x80008000) >> 32) & 0xffff;
5426 #else
5427 abort ();
5428 return (bfd_vma) -1;
5429 #endif
5430 }
5431
5432 /* Calculate the %highest function. */
5433
5434 static bfd_vma
5435 mips_elf_highest (value)
5436 bfd_vma value ATTRIBUTE_UNUSED;
5437 {
5438 #ifdef BFD64
5439 return ((value + (bfd_vma) 0x800080008000) >> 48) & 0xffff;
5440 #else
5441 abort ();
5442 return (bfd_vma) -1;
5443 #endif
5444 }
5445
5446 /* Returns the GOT index for the global symbol indicated by H. */
5447
5448 static bfd_vma
5449 mips_elf_global_got_index (abfd, h)
5450 bfd *abfd;
5451 struct elf_link_hash_entry *h;
5452 {
5453 bfd_vma index;
5454 asection *sgot;
5455 struct mips_got_info *g;
5456
5457 g = mips_elf_got_info (abfd, &sgot);
5458
5459 /* Once we determine the global GOT entry with the lowest dynamic
5460 symbol table index, we must put all dynamic symbols with greater
5461 indices into the GOT. That makes it easy to calculate the GOT
5462 offset. */
5463 BFD_ASSERT (h->dynindx >= g->global_gotsym->dynindx);
5464 index = ((h->dynindx - g->global_gotsym->dynindx + g->local_gotno)
5465 * MIPS_ELF_GOT_SIZE (abfd));
5466 BFD_ASSERT (index < sgot->_raw_size);
5467
5468 return index;
5469 }
5470
5471 /* Returns the offset for the entry at the INDEXth position
5472 in the GOT. */
5473
5474 static bfd_vma
5475 mips_elf_got_offset_from_index (dynobj, output_bfd, index)
5476 bfd *dynobj;
5477 bfd *output_bfd;
5478 bfd_vma index;
5479 {
5480 asection *sgot;
5481 bfd_vma gp;
5482
5483 sgot = mips_elf_got_section (dynobj);
5484 gp = _bfd_get_gp_value (output_bfd);
5485 return (sgot->output_section->vma + sgot->output_offset + index -
5486 gp);
5487 }
5488
5489 /* If H is a symbol that needs a global GOT entry, but has a dynamic
5490 symbol table index lower than any we've seen to date, record it for
5491 posterity. */
5492
5493 static boolean
5494 mips_elf_record_global_got_symbol (h, info, g)
5495 struct elf_link_hash_entry *h;
5496 struct bfd_link_info *info;
5497 struct mips_got_info *g ATTRIBUTE_UNUSED;
5498 {
5499 /* A global symbol in the GOT must also be in the dynamic symbol
5500 table. */
5501 if (h->dynindx == -1
5502 && !bfd_elf32_link_record_dynamic_symbol (info, h))
5503 return false;
5504
5505 /* If we've already marked this entry as need GOT space, we don't
5506 need to do it again. */
5507 if (h->got.offset != (bfd_vma) - 1)
5508 return true;
5509
5510 /* By setting this to a value other than -1, we are indicating that
5511 there needs to be a GOT entry for H. */
5512 h->got.offset = 0;
5513
5514 return true;
5515 }
5516
5517 /* This structure is passed to mips_elf_sort_hash_table_f when sorting
5518 the dynamic symbols. */
5519
5520 struct mips_elf_hash_sort_data
5521 {
5522 /* The symbol in the global GOT with the lowest dynamic symbol table
5523 index. */
5524 struct elf_link_hash_entry *low;
5525 /* The least dynamic symbol table index corresponding to a symbol
5526 with a GOT entry. */
5527 long min_got_dynindx;
5528 /* The greatest dynamic symbol table index not corresponding to a
5529 symbol without a GOT entry. */
5530 long max_non_got_dynindx;
5531 };
5532
5533 /* If H needs a GOT entry, assign it the highest available dynamic
5534 index. Otherwise, assign it the lowest available dynamic
5535 index. */
5536
5537 static boolean
5538 mips_elf_sort_hash_table_f (h, data)
5539 struct mips_elf_link_hash_entry *h;
5540 PTR data;
5541 {
5542 struct mips_elf_hash_sort_data *hsd
5543 = (struct mips_elf_hash_sort_data *) data;
5544
5545 /* Symbols without dynamic symbol table entries aren't interesting
5546 at all. */
5547 if (h->root.dynindx == -1)
5548 return true;
5549
5550 if (h->root.got.offset != 0)
5551 h->root.dynindx = hsd->max_non_got_dynindx++;
5552 else
5553 {
5554 h->root.dynindx = --hsd->min_got_dynindx;
5555 hsd->low = (struct elf_link_hash_entry *) h;
5556 }
5557
5558 return true;
5559 }
5560
5561 /* Sort the dynamic symbol table so that symbols that need GOT entries
5562 appear towards the end. This reduces the amount of GOT space
5563 required. MAX_LOCAL is used to set the number of local symbols
5564 known to be in the dynamic symbol table. During
5565 mips_elf_size_dynamic_sections, this value is 1. Afterward, the
5566 section symbols are added and the count is higher. */
5567
5568 static boolean
5569 mips_elf_sort_hash_table (info, max_local)
5570 struct bfd_link_info *info;
5571 unsigned long max_local;
5572 {
5573 struct mips_elf_hash_sort_data hsd;
5574 struct mips_got_info *g;
5575 bfd *dynobj;
5576
5577 dynobj = elf_hash_table (info)->dynobj;
5578
5579 hsd.low = NULL;
5580 hsd.min_got_dynindx = elf_hash_table (info)->dynsymcount;
5581 hsd.max_non_got_dynindx = max_local;
5582 mips_elf_link_hash_traverse (((struct mips_elf_link_hash_table *)
5583 elf_hash_table (info)),
5584 mips_elf_sort_hash_table_f,
5585 &hsd);
5586
5587 /* There shoud have been enough room in the symbol table to
5588 accomodate both the GOT and non-GOT symbols. */
5589 BFD_ASSERT (hsd.max_non_got_dynindx <= hsd.min_got_dynindx);
5590
5591 /* Now we know which dynamic symbol has the lowest dynamic symbol
5592 table index in the GOT. */
5593 g = mips_elf_got_info (dynobj, NULL);
5594 g->global_gotsym = hsd.low;
5595
5596 return true;
5597 }
5598
5599 /* Create a local GOT entry for VALUE. Return the index of the entry,
5600 or -1 if it could not be created. */
5601
5602 static bfd_vma
5603 mips_elf_create_local_got_entry (abfd, g, sgot, value)
5604 bfd *abfd;
5605 struct mips_got_info *g;
5606 asection *sgot;
5607 bfd_vma value;
5608 {
5609 if (g->assigned_gotno >= g->local_gotno)
5610 {
5611 /* We didn't allocate enough space in the GOT. */
5612 (*_bfd_error_handler)
5613 (_("not enough GOT space for local GOT entries"));
5614 bfd_set_error (bfd_error_bad_value);
5615 return (bfd_vma) -1;
5616 }
5617
5618 MIPS_ELF_PUT_WORD (abfd, value,
5619 (sgot->contents
5620 + MIPS_ELF_GOT_SIZE (abfd) * g->assigned_gotno));
5621 return MIPS_ELF_GOT_SIZE (abfd) * g->assigned_gotno++;
5622 }
5623
5624 /* Returns the GOT offset at which the indicated address can be found.
5625 If there is not yet a GOT entry for this value, create one. Returns
5626 -1 if no satisfactory GOT offset can be found. */
5627
5628 static bfd_vma
5629 mips_elf_local_got_index (abfd, info, value)
5630 bfd *abfd;
5631 struct bfd_link_info *info;
5632 bfd_vma value;
5633 {
5634 asection *sgot;
5635 struct mips_got_info *g;
5636 bfd_byte *entry;
5637
5638 g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
5639
5640 /* Look to see if we already have an appropriate entry. */
5641 for (entry = (sgot->contents
5642 + MIPS_ELF_GOT_SIZE (abfd) * MIPS_RESERVED_GOTNO);
5643 entry != sgot->contents + MIPS_ELF_GOT_SIZE (abfd) * g->assigned_gotno;
5644 entry += MIPS_ELF_GOT_SIZE (abfd))
5645 {
5646 bfd_vma address = MIPS_ELF_GET_WORD (abfd, entry);
5647 if (address == value)
5648 return entry - sgot->contents;
5649 }
5650
5651 return mips_elf_create_local_got_entry (abfd, g, sgot, value);
5652 }
5653
5654 /* Find a GOT entry that is within 32KB of the VALUE. These entries
5655 are supposed to be placed at small offsets in the GOT, i.e.,
5656 within 32KB of GP. Return the index into the GOT for this page,
5657 and store the offset from this entry to the desired address in
5658 OFFSETP, if it is non-NULL. */
5659
5660 static bfd_vma
5661 mips_elf_got_page (abfd, info, value, offsetp)
5662 bfd *abfd;
5663 struct bfd_link_info *info;
5664 bfd_vma value;
5665 bfd_vma *offsetp;
5666 {
5667 asection *sgot;
5668 struct mips_got_info *g;
5669 bfd_byte *entry;
5670 bfd_byte *last_entry;
5671 bfd_vma index = 0;
5672 bfd_vma address;
5673
5674 g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
5675
5676 /* Look to see if we aleady have an appropriate entry. */
5677 last_entry = sgot->contents + MIPS_ELF_GOT_SIZE (abfd) * g->assigned_gotno;
5678 for (entry = (sgot->contents
5679 + MIPS_ELF_GOT_SIZE (abfd) * MIPS_RESERVED_GOTNO);
5680 entry != last_entry;
5681 entry += MIPS_ELF_GOT_SIZE (abfd))
5682 {
5683 address = MIPS_ELF_GET_WORD (abfd, entry);
5684
5685 if (!mips_elf_overflow_p (value - address, 16))
5686 {
5687 /* This entry will serve as the page pointer. We can add a
5688 16-bit number to it to get the actual address. */
5689 index = entry - sgot->contents;
5690 break;
5691 }
5692 }
5693
5694 /* If we didn't have an appropriate entry, we create one now. */
5695 if (entry == last_entry)
5696 index = mips_elf_create_local_got_entry (abfd, g, sgot, value);
5697
5698 if (offsetp)
5699 {
5700 address = MIPS_ELF_GET_WORD (abfd, entry);
5701 *offsetp = value - address;
5702 }
5703
5704 return index;
5705 }
5706
5707 /* Find a GOT entry whose higher-order 16 bits are the same as those
5708 for value. Return the index into the GOT for this entry. */
5709
5710 static bfd_vma
5711 mips_elf_got16_entry (abfd, info, value, external)
5712 bfd *abfd;
5713 struct bfd_link_info *info;
5714 bfd_vma value;
5715 boolean external;
5716 {
5717 asection *sgot;
5718 struct mips_got_info *g;
5719 bfd_byte *entry;
5720 bfd_byte *last_entry;
5721 bfd_vma index = 0;
5722 bfd_vma address;
5723
5724 if (! external)
5725 {
5726 /* Although the ABI says that it is "the high-order 16 bits" that we
5727 want, it is really the %high value. The complete value is
5728 calculated with a `addiu' of a LO16 relocation, just as with a
5729 HI16/LO16 pair. */
5730 value = mips_elf_high (value) << 16;
5731 }
5732
5733 g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
5734
5735 /* Look to see if we already have an appropriate entry. */
5736 last_entry = sgot->contents + MIPS_ELF_GOT_SIZE (abfd) * g->assigned_gotno;
5737 for (entry = (sgot->contents
5738 + MIPS_ELF_GOT_SIZE (abfd) * MIPS_RESERVED_GOTNO);
5739 entry != last_entry;
5740 entry += MIPS_ELF_GOT_SIZE (abfd))
5741 {
5742 address = MIPS_ELF_GET_WORD (abfd, entry);
5743 if (address == value)
5744 {
5745 /* This entry has the right high-order 16 bits, and the low-order
5746 16 bits are set to zero. */
5747 index = entry - sgot->contents;
5748 break;
5749 }
5750 }
5751
5752 /* If we didn't have an appropriate entry, we create one now. */
5753 if (entry == last_entry)
5754 index = mips_elf_create_local_got_entry (abfd, g, sgot, value);
5755
5756 return index;
5757 }
5758
5759 /* Returns the first relocation of type r_type found, beginning with
5760 RELOCATION. RELEND is one-past-the-end of the relocation table. */
5761
5762 static const Elf_Internal_Rela *
5763 mips_elf_next_relocation (r_type, relocation, relend)
5764 unsigned int r_type;
5765 const Elf_Internal_Rela *relocation;
5766 const Elf_Internal_Rela *relend;
5767 {
5768 /* According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must be
5769 immediately following. However, for the IRIX6 ABI, the next
5770 relocation may be a composed relocation consisting of several
5771 relocations for the same address. In that case, the R_MIPS_LO16
5772 relocation may occur as one of these. We permit a similar
5773 extension in general, as that is useful for GCC. */
5774 while (relocation < relend)
5775 {
5776 if (ELF32_R_TYPE (relocation->r_info) == r_type)
5777 return relocation;
5778
5779 ++relocation;
5780 }
5781
5782 /* We didn't find it. */
5783 bfd_set_error (bfd_error_bad_value);
5784 return NULL;
5785 }
5786
5787 /* Create a rel.dyn relocation for the dynamic linker to resolve. REL
5788 is the original relocation, which is now being transformed into a
5789 dynamic relocation. The ADDENDP is adjusted if necessary; the
5790 caller should store the result in place of the original addend. */
5791
5792 static boolean
5793 mips_elf_create_dynamic_relocation (output_bfd, info, rel, h, sec,
5794 symbol, addendp, input_section)
5795 bfd *output_bfd;
5796 struct bfd_link_info *info;
5797 const Elf_Internal_Rela *rel;
5798 struct mips_elf_link_hash_entry *h;
5799 asection *sec;
5800 bfd_vma symbol;
5801 bfd_vma *addendp;
5802 asection *input_section;
5803 {
5804 Elf_Internal_Rel outrel;
5805 boolean skip;
5806 asection *sreloc;
5807 bfd *dynobj;
5808 int r_type;
5809
5810 r_type = ELF32_R_TYPE (rel->r_info);
5811 dynobj = elf_hash_table (info)->dynobj;
5812 sreloc
5813 = bfd_get_section_by_name (dynobj,
5814 MIPS_ELF_REL_DYN_SECTION_NAME (output_bfd));
5815 BFD_ASSERT (sreloc != NULL);
5816 BFD_ASSERT (sreloc->contents != NULL);
5817 BFD_ASSERT (sreloc->reloc_count * MIPS_ELF_REL_SIZE (output_bfd)
5818 < sreloc->_raw_size);
5819
5820 skip = false;
5821
5822 /* We begin by assuming that the offset for the dynamic relocation
5823 is the same as for the original relocation. We'll adjust this
5824 later to reflect the correct output offsets. */
5825 if (elf_section_data (input_section)->stab_info == NULL)
5826 outrel.r_offset = rel->r_offset;
5827 else
5828 {
5829 /* Except that in a stab section things are more complex.
5830 Because we compress stab information, the offset given in the
5831 relocation may not be the one we want; we must let the stabs
5832 machinery tell us the offset. */
5833 outrel.r_offset
5834 = (_bfd_stab_section_offset
5835 (output_bfd, &elf_hash_table (info)->stab_info,
5836 input_section,
5837 &elf_section_data (input_section)->stab_info,
5838 rel->r_offset));
5839 /* If we didn't need the relocation at all, this value will be
5840 -1. */
5841 if (outrel.r_offset == (bfd_vma) -1)
5842 skip = true;
5843 }
5844
5845 /* If we've decided to skip this relocation, just output an empty
5846 record. Note that R_MIPS_NONE == 0, so that this call to memset
5847 is a way of setting R_TYPE to R_MIPS_NONE. */
5848 if (skip)
5849 memset (&outrel, 0, sizeof (outrel));
5850 else
5851 {
5852 long indx;
5853 bfd_vma section_offset;
5854
5855 /* We must now calculate the dynamic symbol table index to use
5856 in the relocation. */
5857 if (h != NULL
5858 && (! info->symbolic || (h->root.elf_link_hash_flags
5859 & ELF_LINK_HASH_DEF_REGULAR) == 0))
5860 {
5861 indx = h->root.dynindx;
5862 /* h->root.dynindx may be -1 if this symbol was marked to
5863 become local. */
5864 if (indx == -1)
5865 indx = 0;
5866 }
5867 else
5868 {
5869 if (sec != NULL && bfd_is_abs_section (sec))
5870 indx = 0;
5871 else if (sec == NULL || sec->owner == NULL)
5872 {
5873 bfd_set_error (bfd_error_bad_value);
5874 return false;
5875 }
5876 else
5877 {
5878 indx = elf_section_data (sec->output_section)->dynindx;
5879 if (indx == 0)
5880 abort ();
5881 }
5882
5883 /* Figure out how far the target of the relocation is from
5884 the beginning of its section. */
5885 section_offset = symbol - sec->output_section->vma;
5886 /* The relocation we're building is section-relative.
5887 Therefore, the original addend must be adjusted by the
5888 section offset. */
5889 *addendp += section_offset;
5890 /* Now, the relocation is just against the section. */
5891 symbol = sec->output_section->vma;
5892 }
5893
5894 /* If the relocation was previously an absolute relocation and
5895 this symbol will not be referred to by the relocation, we must
5896 adjust it by the value we give it in the dynamic symbol table.
5897 Otherwise leave the job up to the dynamic linker. */
5898 if (!indx && r_type != R_MIPS_REL32)
5899 *addendp += symbol;
5900
5901 /* The relocation is always an REL32 relocation because we don't
5902 know where the shared library will wind up at load-time. */
5903 outrel.r_info = ELF32_R_INFO (indx, R_MIPS_REL32);
5904
5905 /* Adjust the output offset of the relocation to reference the
5906 correct location in the output file. */
5907 outrel.r_offset += (input_section->output_section->vma
5908 + input_section->output_offset);
5909 }
5910
5911 /* Put the relocation back out. We have to use the special
5912 relocation outputter in the 64-bit case since the 64-bit
5913 relocation format is non-standard. */
5914 if (ABI_64_P (output_bfd))
5915 {
5916 (*get_elf_backend_data (output_bfd)->s->swap_reloc_out)
5917 (output_bfd, &outrel,
5918 (sreloc->contents
5919 + sreloc->reloc_count * sizeof (Elf64_Mips_External_Rel)));
5920 }
5921 else
5922 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
5923 (((Elf32_External_Rel *)
5924 sreloc->contents)
5925 + sreloc->reloc_count));
5926
5927 /* Record the index of the first relocation referencing H. This
5928 information is later emitted in the .msym section. */
5929 if (h != NULL
5930 && (h->min_dyn_reloc_index == 0
5931 || sreloc->reloc_count < h->min_dyn_reloc_index))
5932 h->min_dyn_reloc_index = sreloc->reloc_count;
5933
5934 /* We've now added another relocation. */
5935 ++sreloc->reloc_count;
5936
5937 /* Make sure the output section is writable. The dynamic linker
5938 will be writing to it. */
5939 elf_section_data (input_section->output_section)->this_hdr.sh_flags
5940 |= SHF_WRITE;
5941
5942 /* On IRIX5, make an entry of compact relocation info. */
5943 if (! skip && IRIX_COMPAT (output_bfd) == ict_irix5)
5944 {
5945 asection *scpt = bfd_get_section_by_name (dynobj, ".compact_rel");
5946 bfd_byte *cr;
5947
5948 if (scpt)
5949 {
5950 Elf32_crinfo cptrel;
5951
5952 mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG);
5953 cptrel.vaddr = (rel->r_offset
5954 + input_section->output_section->vma
5955 + input_section->output_offset);
5956 if (r_type == R_MIPS_REL32)
5957 mips_elf_set_cr_type (cptrel, CRT_MIPS_REL32);
5958 else
5959 mips_elf_set_cr_type (cptrel, CRT_MIPS_WORD);
5960 mips_elf_set_cr_dist2to (cptrel, 0);
5961 cptrel.konst = *addendp;
5962
5963 cr = (scpt->contents
5964 + sizeof (Elf32_External_compact_rel));
5965 bfd_elf32_swap_crinfo_out (output_bfd, &cptrel,
5966 ((Elf32_External_crinfo *) cr
5967 + scpt->reloc_count));
5968 ++scpt->reloc_count;
5969 }
5970 }
5971
5972 return true;
5973 }
5974
5975 /* Calculate the value produced by the RELOCATION (which comes from
5976 the INPUT_BFD). The ADDEND is the addend to use for this
5977 RELOCATION; RELOCATION->R_ADDEND is ignored.
5978
5979 The result of the relocation calculation is stored in VALUEP.
5980 REQUIRE_JALXP indicates whether or not the opcode used with this
5981 relocation must be JALX.
5982
5983 This function returns bfd_reloc_continue if the caller need take no
5984 further action regarding this relocation, bfd_reloc_notsupported if
5985 something goes dramatically wrong, bfd_reloc_overflow if an
5986 overflow occurs, and bfd_reloc_ok to indicate success. */
5987
5988 static bfd_reloc_status_type
5989 mips_elf_calculate_relocation (abfd,
5990 input_bfd,
5991 input_section,
5992 info,
5993 relocation,
5994 addend,
5995 howto,
5996 local_syms,
5997 local_sections,
5998 valuep,
5999 namep,
6000 require_jalxp)
6001 bfd *abfd;
6002 bfd *input_bfd;
6003 asection *input_section;
6004 struct bfd_link_info *info;
6005 const Elf_Internal_Rela *relocation;
6006 bfd_vma addend;
6007 reloc_howto_type *howto;
6008 Elf_Internal_Sym *local_syms;
6009 asection **local_sections;
6010 bfd_vma *valuep;
6011 const char **namep;
6012 boolean *require_jalxp;
6013 {
6014 /* The eventual value we will return. */
6015 bfd_vma value;
6016 /* The address of the symbol against which the relocation is
6017 occurring. */
6018 bfd_vma symbol = 0;
6019 /* The final GP value to be used for the relocatable, executable, or
6020 shared object file being produced. */
6021 bfd_vma gp = (bfd_vma) - 1;
6022 /* The place (section offset or address) of the storage unit being
6023 relocated. */
6024 bfd_vma p;
6025 /* The value of GP used to create the relocatable object. */
6026 bfd_vma gp0 = (bfd_vma) - 1;
6027 /* The offset into the global offset table at which the address of
6028 the relocation entry symbol, adjusted by the addend, resides
6029 during execution. */
6030 bfd_vma g = (bfd_vma) - 1;
6031 /* The section in which the symbol referenced by the relocation is
6032 located. */
6033 asection *sec = NULL;
6034 struct mips_elf_link_hash_entry *h = NULL;
6035 /* True if the symbol referred to by this relocation is a local
6036 symbol. */
6037 boolean local_p;
6038 /* True if the symbol referred to by this relocation is "_gp_disp". */
6039 boolean gp_disp_p = false;
6040 Elf_Internal_Shdr *symtab_hdr;
6041 size_t extsymoff;
6042 unsigned long r_symndx;
6043 int r_type;
6044 /* True if overflow occurred during the calculation of the
6045 relocation value. */
6046 boolean overflowed_p;
6047 /* True if this relocation refers to a MIPS16 function. */
6048 boolean target_is_16_bit_code_p = false;
6049
6050 /* Parse the relocation. */
6051 r_symndx = ELF32_R_SYM (relocation->r_info);
6052 r_type = ELF32_R_TYPE (relocation->r_info);
6053 p = (input_section->output_section->vma
6054 + input_section->output_offset
6055 + relocation->r_offset);
6056
6057 /* Assume that there will be no overflow. */
6058 overflowed_p = false;
6059
6060 /* Figure out whether or not the symbol is local, and get the offset
6061 used in the array of hash table entries. */
6062 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6063 local_p = mips_elf_local_relocation_p (input_bfd, relocation,
6064 local_sections, false);
6065 if (! elf_bad_symtab (input_bfd))
6066 extsymoff = symtab_hdr->sh_info;
6067 else
6068 {
6069 /* The symbol table does not follow the rule that local symbols
6070 must come before globals. */
6071 extsymoff = 0;
6072 }
6073
6074 /* Figure out the value of the symbol. */
6075 if (local_p)
6076 {
6077 Elf_Internal_Sym *sym;
6078
6079 sym = local_syms + r_symndx;
6080 sec = local_sections[r_symndx];
6081
6082 symbol = sec->output_section->vma + sec->output_offset;
6083 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
6084 symbol += sym->st_value;
6085
6086 /* MIPS16 text labels should be treated as odd. */
6087 if (sym->st_other == STO_MIPS16)
6088 ++symbol;
6089
6090 /* Record the name of this symbol, for our caller. */
6091 *namep = bfd_elf_string_from_elf_section (input_bfd,
6092 symtab_hdr->sh_link,
6093 sym->st_name);
6094 if (*namep == '\0')
6095 *namep = bfd_section_name (input_bfd, sec);
6096
6097 target_is_16_bit_code_p = (sym->st_other == STO_MIPS16);
6098 }
6099 else
6100 {
6101 /* For global symbols we look up the symbol in the hash-table. */
6102 h = ((struct mips_elf_link_hash_entry *)
6103 elf_sym_hashes (input_bfd) [r_symndx - extsymoff]);
6104 /* Find the real hash-table entry for this symbol. */
6105 while (h->root.root.type == bfd_link_hash_indirect
6106 || h->root.root.type == bfd_link_hash_warning)
6107 h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link;
6108
6109 /* Record the name of this symbol, for our caller. */
6110 *namep = h->root.root.root.string;
6111
6112 /* See if this is the special _gp_disp symbol. Note that such a
6113 symbol must always be a global symbol. */
6114 if (strcmp (h->root.root.root.string, "_gp_disp") == 0)
6115 {
6116 /* Relocations against _gp_disp are permitted only with
6117 R_MIPS_HI16 and R_MIPS_LO16 relocations. */
6118 if (r_type != R_MIPS_HI16 && r_type != R_MIPS_LO16)
6119 return bfd_reloc_notsupported;
6120
6121 gp_disp_p = true;
6122 }
6123 /* If this symbol is defined, calculate its address. Note that
6124 _gp_disp is a magic symbol, always implicitly defined by the
6125 linker, so it's inappropriate to check to see whether or not
6126 its defined. */
6127 else if ((h->root.root.type == bfd_link_hash_defined
6128 || h->root.root.type == bfd_link_hash_defweak)
6129 && h->root.root.u.def.section)
6130 {
6131 sec = h->root.root.u.def.section;
6132 if (sec->output_section)
6133 symbol = (h->root.root.u.def.value
6134 + sec->output_section->vma
6135 + sec->output_offset);
6136 else
6137 symbol = h->root.root.u.def.value;
6138 }
6139 else if (h->root.root.type == bfd_link_hash_undefweak)
6140 /* We allow relocations against undefined weak symbols, giving
6141 it the value zero, so that you can undefined weak functions
6142 and check to see if they exist by looking at their
6143 addresses. */
6144 symbol = 0;
6145 else if (info->shared
6146 && (!info->symbolic || info->allow_shlib_undefined)
6147 && !info->no_undefined
6148 && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
6149 symbol = 0;
6150 else if (strcmp (h->root.root.root.string, "_DYNAMIC_LINK") == 0 ||
6151 strcmp (h->root.root.root.string, "_DYNAMIC_LINKING") == 0)
6152 {
6153 /* If this is a dynamic link, we should have created a
6154 _DYNAMIC_LINK symbol or _DYNAMIC_LINKING(for normal mips) symbol
6155 in in mips_elf_create_dynamic_sections.
6156 Otherwise, we should define the symbol with a value of 0.
6157 FIXME: It should probably get into the symbol table
6158 somehow as well. */
6159 BFD_ASSERT (! info->shared);
6160 BFD_ASSERT (bfd_get_section_by_name (abfd, ".dynamic") == NULL);
6161 symbol = 0;
6162 }
6163 else
6164 {
6165 if (! ((*info->callbacks->undefined_symbol)
6166 (info, h->root.root.root.string, input_bfd,
6167 input_section, relocation->r_offset,
6168 (!info->shared || info->no_undefined
6169 || ELF_ST_VISIBILITY (h->root.other)))))
6170 return bfd_reloc_undefined;
6171 symbol = 0;
6172 }
6173
6174 target_is_16_bit_code_p = (h->root.other == STO_MIPS16);
6175 }
6176
6177 /* If this is a 32-bit call to a 16-bit function with a stub, we
6178 need to redirect the call to the stub, unless we're already *in*
6179 a stub. */
6180 if (r_type != R_MIPS16_26 && !info->relocateable
6181 && ((h != NULL && h->fn_stub != NULL)
6182 || (local_p && elf_tdata (input_bfd)->local_stubs != NULL
6183 && elf_tdata (input_bfd)->local_stubs[r_symndx] != NULL))
6184 && !mips_elf_stub_section_p (input_bfd, input_section))
6185 {
6186 /* This is a 32-bit call to a 16-bit function. We should
6187 have already noticed that we were going to need the
6188 stub. */
6189 if (local_p)
6190 sec = elf_tdata (input_bfd)->local_stubs[r_symndx];
6191 else
6192 {
6193 BFD_ASSERT (h->need_fn_stub);
6194 sec = h->fn_stub;
6195 }
6196
6197 symbol = sec->output_section->vma + sec->output_offset;
6198 }
6199 /* If this is a 16-bit call to a 32-bit function with a stub, we
6200 need to redirect the call to the stub. */
6201 else if (r_type == R_MIPS16_26 && !info->relocateable
6202 && h != NULL
6203 && (h->call_stub != NULL || h->call_fp_stub != NULL)
6204 && !target_is_16_bit_code_p)
6205 {
6206 /* If both call_stub and call_fp_stub are defined, we can figure
6207 out which one to use by seeing which one appears in the input
6208 file. */
6209 if (h->call_stub != NULL && h->call_fp_stub != NULL)
6210 {
6211 asection *o;
6212
6213 sec = NULL;
6214 for (o = input_bfd->sections; o != NULL; o = o->next)
6215 {
6216 if (strncmp (bfd_get_section_name (input_bfd, o),
6217 CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0)
6218 {
6219 sec = h->call_fp_stub;
6220 break;
6221 }
6222 }
6223 if (sec == NULL)
6224 sec = h->call_stub;
6225 }
6226 else if (h->call_stub != NULL)
6227 sec = h->call_stub;
6228 else
6229 sec = h->call_fp_stub;
6230
6231 BFD_ASSERT (sec->_raw_size > 0);
6232 symbol = sec->output_section->vma + sec->output_offset;
6233 }
6234
6235 /* Calls from 16-bit code to 32-bit code and vice versa require the
6236 special jalx instruction. */
6237 *require_jalxp = (!info->relocateable
6238 && ((r_type == R_MIPS16_26) != target_is_16_bit_code_p));
6239
6240 local_p = mips_elf_local_relocation_p (input_bfd, relocation,
6241 local_sections, true);
6242
6243 /* If we haven't already determined the GOT offset, or the GP value,
6244 and we're going to need it, get it now. */
6245 switch (r_type)
6246 {
6247 case R_MIPS_CALL16:
6248 case R_MIPS_GOT16:
6249 case R_MIPS_GOT_DISP:
6250 case R_MIPS_GOT_HI16:
6251 case R_MIPS_CALL_HI16:
6252 case R_MIPS_GOT_LO16:
6253 case R_MIPS_CALL_LO16:
6254 /* Find the index into the GOT where this value is located. */
6255 if (!local_p)
6256 {
6257 BFD_ASSERT (addend == 0);
6258 g = mips_elf_global_got_index
6259 (elf_hash_table (info)->dynobj,
6260 (struct elf_link_hash_entry *) h);
6261 if (! elf_hash_table(info)->dynamic_sections_created
6262 || (info->shared
6263 && (info->symbolic || h->root.dynindx == -1)
6264 && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
6265 {
6266 /* This is a static link or a -Bsymbolic link. The
6267 symbol is defined locally, or was forced to be local.
6268 We must initialize this entry in the GOT. */
6269 asection *sgot = mips_elf_got_section(elf_hash_table
6270 (info)->dynobj);
6271 MIPS_ELF_PUT_WORD (elf_hash_table (info)->dynobj,
6272 symbol + addend, sgot->contents + g);
6273 }
6274 }
6275 else if (r_type == R_MIPS_GOT16 || r_type == R_MIPS_CALL16)
6276 /* There's no need to create a local GOT entry here; the
6277 calculation for a local GOT16 entry does not involve G. */
6278 break;
6279 else
6280 {
6281 g = mips_elf_local_got_index (abfd, info, symbol + addend);
6282 if (g == (bfd_vma) -1)
6283 return false;
6284 }
6285
6286 /* Convert GOT indices to actual offsets. */
6287 g = mips_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
6288 abfd, g);
6289 break;
6290
6291 case R_MIPS_HI16:
6292 case R_MIPS_LO16:
6293 case R_MIPS_GPREL16:
6294 case R_MIPS_GPREL32:
6295 case R_MIPS_LITERAL:
6296 gp0 = _bfd_get_gp_value (input_bfd);
6297 gp = _bfd_get_gp_value (abfd);
6298 break;
6299
6300 default:
6301 break;
6302 }
6303
6304 /* Figure out what kind of relocation is being performed. */
6305 switch (r_type)
6306 {
6307 case R_MIPS_NONE:
6308 return bfd_reloc_continue;
6309
6310 case R_MIPS_16:
6311 value = symbol + mips_elf_sign_extend (addend, 16);
6312 overflowed_p = mips_elf_overflow_p (value, 16);
6313 break;
6314
6315 case R_MIPS_32:
6316 case R_MIPS_REL32:
6317 case R_MIPS_64:
6318 if ((info->shared
6319 || (elf_hash_table (info)->dynamic_sections_created
6320 && h != NULL
6321 && ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)
6322 != 0)))
6323 && (input_section->flags & SEC_ALLOC) != 0)
6324 {
6325 /* If we're creating a shared library, or this relocation is
6326 against a symbol in a shared library, then we can't know
6327 where the symbol will end up. So, we create a relocation
6328 record in the output, and leave the job up to the dynamic
6329 linker. */
6330 value = addend;
6331 if (!mips_elf_create_dynamic_relocation (abfd,
6332 info,
6333 relocation,
6334 h,
6335 sec,
6336 symbol,
6337 &value,
6338 input_section))
6339 return false;
6340 }
6341 else
6342 {
6343 if (r_type != R_MIPS_REL32)
6344 value = symbol + addend;
6345 else
6346 value = addend;
6347 }
6348 value &= howto->dst_mask;
6349 break;
6350
6351 case R_MIPS_PC32:
6352 case R_MIPS_PC64:
6353 case R_MIPS_GNU_REL_LO16:
6354 value = symbol + addend - p;
6355 value &= howto->dst_mask;
6356 break;
6357
6358 case R_MIPS_GNU_REL16_S2:
6359 value = symbol + mips_elf_sign_extend (addend << 2, 18) - p;
6360 overflowed_p = mips_elf_overflow_p (value, 18);
6361 value = (value >> 2) & howto->dst_mask;
6362 break;
6363
6364 case R_MIPS_GNU_REL_HI16:
6365 value = mips_elf_high (addend + symbol - p);
6366 value &= howto->dst_mask;
6367 break;
6368
6369 case R_MIPS16_26:
6370 /* The calculation for R_MIPS16_26 is just the same as for an
6371 R_MIPS_26. It's only the storage of the relocated field into
6372 the output file that's different. That's handled in
6373 mips_elf_perform_relocation. So, we just fall through to the
6374 R_MIPS_26 case here. */
6375 case R_MIPS_26:
6376 if (local_p)
6377 value = (((addend << 2) | ((p + 4) & 0xf0000000)) + symbol) >> 2;
6378 else
6379 value = (mips_elf_sign_extend (addend << 2, 28) + symbol) >> 2;
6380 value &= howto->dst_mask;
6381 break;
6382
6383 case R_MIPS_HI16:
6384 if (!gp_disp_p)
6385 {
6386 value = mips_elf_high (addend + symbol);
6387 value &= howto->dst_mask;
6388 }
6389 else
6390 {
6391 value = mips_elf_high (addend + gp - p);
6392 overflowed_p = mips_elf_overflow_p (value, 16);
6393 }
6394 break;
6395
6396 case R_MIPS_LO16:
6397 if (!gp_disp_p)
6398 value = (symbol + addend) & howto->dst_mask;
6399 else
6400 {
6401 value = addend + gp - p + 4;
6402 /* The MIPS ABI requires checking the R_MIPS_LO16 relocation
6403 for overflow. But, on, say, Irix 5, relocations against
6404 _gp_disp are normally generated from the .cpload
6405 pseudo-op. It generates code that normally looks like
6406 this:
6407
6408 lui $gp,%hi(_gp_disp)
6409 addiu $gp,$gp,%lo(_gp_disp)
6410 addu $gp,$gp,$t9
6411
6412 Here $t9 holds the address of the function being called,
6413 as required by the MIPS ELF ABI. The R_MIPS_LO16
6414 relocation can easily overflow in this situation, but the
6415 R_MIPS_HI16 relocation will handle the overflow.
6416 Therefore, we consider this a bug in the MIPS ABI, and do
6417 not check for overflow here. */
6418 }
6419 break;
6420
6421 case R_MIPS_LITERAL:
6422 /* Because we don't merge literal sections, we can handle this
6423 just like R_MIPS_GPREL16. In the long run, we should merge
6424 shared literals, and then we will need to additional work
6425 here. */
6426
6427 /* Fall through. */
6428
6429 case R_MIPS16_GPREL:
6430 /* The R_MIPS16_GPREL performs the same calculation as
6431 R_MIPS_GPREL16, but stores the relocated bits in a different
6432 order. We don't need to do anything special here; the
6433 differences are handled in mips_elf_perform_relocation. */
6434 case R_MIPS_GPREL16:
6435 if (local_p)
6436 value = mips_elf_sign_extend (addend, 16) + symbol + gp0 - gp;
6437 else
6438 value = mips_elf_sign_extend (addend, 16) + symbol - gp;
6439 overflowed_p = mips_elf_overflow_p (value, 16);
6440 break;
6441
6442 case R_MIPS_GOT16:
6443 case R_MIPS_CALL16:
6444 if (local_p)
6445 {
6446 boolean forced;
6447
6448 /* The special case is when the symbol is forced to be local. We
6449 need the full address in the GOT since no R_MIPS_LO16 relocation
6450 follows. */
6451 forced = ! mips_elf_local_relocation_p (input_bfd, relocation,
6452 local_sections, false);
6453 value = mips_elf_got16_entry (abfd, info, symbol + addend, forced);
6454 if (value == (bfd_vma) -1)
6455 return false;
6456 value
6457 = mips_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
6458 abfd,
6459 value);
6460 overflowed_p = mips_elf_overflow_p (value, 16);
6461 break;
6462 }
6463
6464 /* Fall through. */
6465
6466 case R_MIPS_GOT_DISP:
6467 value = g;
6468 overflowed_p = mips_elf_overflow_p (value, 16);
6469 break;
6470
6471 case R_MIPS_GPREL32:
6472 value = (addend + symbol + gp0 - gp) & howto->dst_mask;
6473 break;
6474
6475 case R_MIPS_PC16:
6476 value = mips_elf_sign_extend (addend, 16) + symbol - p;
6477 overflowed_p = mips_elf_overflow_p (value, 16);
6478 value = (bfd_vma) ((bfd_signed_vma) value / 4);
6479 break;
6480
6481 case R_MIPS_GOT_HI16:
6482 case R_MIPS_CALL_HI16:
6483 /* We're allowed to handle these two relocations identically.
6484 The dynamic linker is allowed to handle the CALL relocations
6485 differently by creating a lazy evaluation stub. */
6486 value = g;
6487 value = mips_elf_high (value);
6488 value &= howto->dst_mask;
6489 break;
6490
6491 case R_MIPS_GOT_LO16:
6492 case R_MIPS_CALL_LO16:
6493 value = g & howto->dst_mask;
6494 break;
6495
6496 case R_MIPS_GOT_PAGE:
6497 value = mips_elf_got_page (abfd, info, symbol + addend, NULL);
6498 if (value == (bfd_vma) -1)
6499 return false;
6500 value = mips_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
6501 abfd,
6502 value);
6503 overflowed_p = mips_elf_overflow_p (value, 16);
6504 break;
6505
6506 case R_MIPS_GOT_OFST:
6507 mips_elf_got_page (abfd, info, symbol + addend, &value);
6508 overflowed_p = mips_elf_overflow_p (value, 16);
6509 break;
6510
6511 case R_MIPS_SUB:
6512 value = symbol - addend;
6513 value &= howto->dst_mask;
6514 break;
6515
6516 case R_MIPS_HIGHER:
6517 value = mips_elf_higher (addend + symbol);
6518 value &= howto->dst_mask;
6519 break;
6520
6521 case R_MIPS_HIGHEST:
6522 value = mips_elf_highest (addend + symbol);
6523 value &= howto->dst_mask;
6524 break;
6525
6526 case R_MIPS_SCN_DISP:
6527 value = symbol + addend - sec->output_offset;
6528 value &= howto->dst_mask;
6529 break;
6530
6531 case R_MIPS_PJUMP:
6532 case R_MIPS_JALR:
6533 /* Both of these may be ignored. R_MIPS_JALR is an optimization
6534 hint; we could improve performance by honoring that hint. */
6535 return bfd_reloc_continue;
6536
6537 case R_MIPS_GNU_VTINHERIT:
6538 case R_MIPS_GNU_VTENTRY:
6539 /* We don't do anything with these at present. */
6540 return bfd_reloc_continue;
6541
6542 default:
6543 /* An unrecognized relocation type. */
6544 return bfd_reloc_notsupported;
6545 }
6546
6547 /* Store the VALUE for our caller. */
6548 *valuep = value;
6549 return overflowed_p ? bfd_reloc_overflow : bfd_reloc_ok;
6550 }
6551
6552 /* Obtain the field relocated by RELOCATION. */
6553
6554 static bfd_vma
6555 mips_elf_obtain_contents (howto, relocation, input_bfd, contents)
6556 reloc_howto_type *howto;
6557 const Elf_Internal_Rela *relocation;
6558 bfd *input_bfd;
6559 bfd_byte *contents;
6560 {
6561 bfd_vma x;
6562 bfd_byte *location = contents + relocation->r_offset;
6563
6564 /* Obtain the bytes. */
6565 x = bfd_get (((bfd_vma)(8 * bfd_get_reloc_size (howto))), input_bfd, location);
6566
6567 if ((ELF32_R_TYPE (relocation->r_info) == R_MIPS16_26
6568 || ELF32_R_TYPE (relocation->r_info) == R_MIPS16_GPREL)
6569 && bfd_little_endian (input_bfd))
6570 /* The two 16-bit words will be reversed on a little-endian
6571 system. See mips_elf_perform_relocation for more details. */
6572 x = (((x & 0xffff) << 16) | ((x & 0xffff0000) >> 16));
6573
6574 return x;
6575 }
6576
6577 /* It has been determined that the result of the RELOCATION is the
6578 VALUE. Use HOWTO to place VALUE into the output file at the
6579 appropriate position. The SECTION is the section to which the
6580 relocation applies. If REQUIRE_JALX is true, then the opcode used
6581 for the relocation must be either JAL or JALX, and it is
6582 unconditionally converted to JALX.
6583
6584 Returns false if anything goes wrong. */
6585
6586 static boolean
6587 mips_elf_perform_relocation (info, howto, relocation, value,
6588 input_bfd, input_section,
6589 contents, require_jalx)
6590 struct bfd_link_info *info;
6591 reloc_howto_type *howto;
6592 const Elf_Internal_Rela *relocation;
6593 bfd_vma value;
6594 bfd *input_bfd;
6595 asection *input_section;
6596 bfd_byte *contents;
6597 boolean require_jalx;
6598 {
6599 bfd_vma x;
6600 bfd_byte *location;
6601 int r_type = ELF32_R_TYPE (relocation->r_info);
6602
6603 /* Figure out where the relocation is occurring. */
6604 location = contents + relocation->r_offset;
6605
6606 /* Obtain the current value. */
6607 x = mips_elf_obtain_contents (howto, relocation, input_bfd, contents);
6608
6609 /* Clear the field we are setting. */
6610 x &= ~howto->dst_mask;
6611
6612 /* If this is the R_MIPS16_26 relocation, we must store the
6613 value in a funny way. */
6614 if (r_type == R_MIPS16_26)
6615 {
6616 /* R_MIPS16_26 is used for the mips16 jal and jalx instructions.
6617 Most mips16 instructions are 16 bits, but these instructions
6618 are 32 bits.
6619
6620 The format of these instructions is:
6621
6622 +--------------+--------------------------------+
6623 ! JALX ! X! Imm 20:16 ! Imm 25:21 !
6624 +--------------+--------------------------------+
6625 ! Immediate 15:0 !
6626 +-----------------------------------------------+
6627
6628 JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx.
6629 Note that the immediate value in the first word is swapped.
6630
6631 When producing a relocateable object file, R_MIPS16_26 is
6632 handled mostly like R_MIPS_26. In particular, the addend is
6633 stored as a straight 26-bit value in a 32-bit instruction.
6634 (gas makes life simpler for itself by never adjusting a
6635 R_MIPS16_26 reloc to be against a section, so the addend is
6636 always zero). However, the 32 bit instruction is stored as 2
6637 16-bit values, rather than a single 32-bit value. In a
6638 big-endian file, the result is the same; in a little-endian
6639 file, the two 16-bit halves of the 32 bit value are swapped.
6640 This is so that a disassembler can recognize the jal
6641 instruction.
6642
6643 When doing a final link, R_MIPS16_26 is treated as a 32 bit
6644 instruction stored as two 16-bit values. The addend A is the
6645 contents of the targ26 field. The calculation is the same as
6646 R_MIPS_26. When storing the calculated value, reorder the
6647 immediate value as shown above, and don't forget to store the
6648 value as two 16-bit values.
6649
6650 To put it in MIPS ABI terms, the relocation field is T-targ26-16,
6651 defined as
6652
6653 big-endian:
6654 +--------+----------------------+
6655 | | |
6656 | | targ26-16 |
6657 |31 26|25 0|
6658 +--------+----------------------+
6659
6660 little-endian:
6661 +----------+------+-------------+
6662 | | | |
6663 | sub1 | | sub2 |
6664 |0 9|10 15|16 31|
6665 +----------+--------------------+
6666 where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is
6667 ((sub1 << 16) | sub2)).
6668
6669 When producing a relocateable object file, the calculation is
6670 (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
6671 When producing a fully linked file, the calculation is
6672 let R = (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
6673 ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff) */
6674
6675 if (!info->relocateable)
6676 /* Shuffle the bits according to the formula above. */
6677 value = (((value & 0x1f0000) << 5)
6678 | ((value & 0x3e00000) >> 5)
6679 | (value & 0xffff));
6680 }
6681 else if (r_type == R_MIPS16_GPREL)
6682 {
6683 /* R_MIPS16_GPREL is used for GP-relative addressing in mips16
6684 mode. A typical instruction will have a format like this:
6685
6686 +--------------+--------------------------------+
6687 ! EXTEND ! Imm 10:5 ! Imm 15:11 !
6688 +--------------+--------------------------------+
6689 ! Major ! rx ! ry ! Imm 4:0 !
6690 +--------------+--------------------------------+
6691
6692 EXTEND is the five bit value 11110. Major is the instruction
6693 opcode.
6694
6695 This is handled exactly like R_MIPS_GPREL16, except that the
6696 addend is retrieved and stored as shown in this diagram; that
6697 is, the Imm fields above replace the V-rel16 field.
6698
6699 All we need to do here is shuffle the bits appropriately. As
6700 above, the two 16-bit halves must be swapped on a
6701 little-endian system. */
6702 value = (((value & 0x7e0) << 16)
6703 | ((value & 0xf800) << 5)
6704 | (value & 0x1f));
6705 }
6706
6707 /* Set the field. */
6708 x |= (value & howto->dst_mask);
6709
6710 /* If required, turn JAL into JALX. */
6711 if (require_jalx)
6712 {
6713 boolean ok;
6714 bfd_vma opcode = x >> 26;
6715 bfd_vma jalx_opcode;
6716
6717 /* Check to see if the opcode is already JAL or JALX. */
6718 if (r_type == R_MIPS16_26)
6719 {
6720 ok = ((opcode == 0x6) || (opcode == 0x7));
6721 jalx_opcode = 0x7;
6722 }
6723 else
6724 {
6725 ok = ((opcode == 0x3) || (opcode == 0x1d));
6726 jalx_opcode = 0x1d;
6727 }
6728
6729 /* If the opcode is not JAL or JALX, there's a problem. */
6730 if (!ok)
6731 {
6732 (*_bfd_error_handler)
6733 (_("%s: %s+0x%lx: jump to stub routine which is not jal"),
6734 bfd_archive_filename (input_bfd),
6735 input_section->name,
6736 (unsigned long) relocation->r_offset);
6737 bfd_set_error (bfd_error_bad_value);
6738 return false;
6739 }
6740
6741 /* Make this the JALX opcode. */
6742 x = (x & ~(0x3f << 26)) | (jalx_opcode << 26);
6743 }
6744
6745 /* Swap the high- and low-order 16 bits on little-endian systems
6746 when doing a MIPS16 relocation. */
6747 if ((r_type == R_MIPS16_GPREL || r_type == R_MIPS16_26)
6748 && bfd_little_endian (input_bfd))
6749 x = (((x & 0xffff) << 16) | ((x & 0xffff0000) >> 16));
6750
6751 /* Put the value into the output. */
6752 bfd_put (8 * bfd_get_reloc_size (howto), input_bfd, x, location);
6753 return true;
6754 }
6755
6756 /* Returns true if SECTION is a MIPS16 stub section. */
6757
6758 static boolean
6759 mips_elf_stub_section_p (abfd, section)
6760 bfd *abfd ATTRIBUTE_UNUSED;
6761 asection *section;
6762 {
6763 const char *name = bfd_get_section_name (abfd, section);
6764
6765 return (strncmp (name, FN_STUB, sizeof FN_STUB - 1) == 0
6766 || strncmp (name, CALL_STUB, sizeof CALL_STUB - 1) == 0
6767 || strncmp (name, CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0);
6768 }
6769
6770 /* Relocate a MIPS ELF section. */
6771
6772 boolean
6773 _bfd_mips_elf_relocate_section (output_bfd, info, input_bfd, input_section,
6774 contents, relocs, local_syms, local_sections)
6775 bfd *output_bfd;
6776 struct bfd_link_info *info;
6777 bfd *input_bfd;
6778 asection *input_section;
6779 bfd_byte *contents;
6780 Elf_Internal_Rela *relocs;
6781 Elf_Internal_Sym *local_syms;
6782 asection **local_sections;
6783 {
6784 Elf_Internal_Rela *rel;
6785 const Elf_Internal_Rela *relend;
6786 bfd_vma addend = 0;
6787 boolean use_saved_addend_p = false;
6788 struct elf_backend_data *bed;
6789
6790 bed = get_elf_backend_data (output_bfd);
6791 relend = relocs + input_section->reloc_count * bed->s->int_rels_per_ext_rel;
6792 for (rel = relocs; rel < relend; ++rel)
6793 {
6794 const char *name;
6795 bfd_vma value;
6796 reloc_howto_type *howto;
6797 boolean require_jalx;
6798 /* True if the relocation is a RELA relocation, rather than a
6799 REL relocation. */
6800 boolean rela_relocation_p = true;
6801 unsigned int r_type = ELF32_R_TYPE (rel->r_info);
6802 const char * msg = (const char *) NULL;
6803
6804 /* Find the relocation howto for this relocation. */
6805 if (r_type == R_MIPS_64 && !ABI_64_P (output_bfd))
6806 {
6807 /* Some 32-bit code uses R_MIPS_64. In particular, people use
6808 64-bit code, but make sure all their addresses are in the
6809 lowermost or uppermost 32-bit section of the 64-bit address
6810 space. Thus, when they use an R_MIPS_64 they mean what is
6811 usually meant by R_MIPS_32, with the exception that the
6812 stored value is sign-extended to 64 bits. */
6813 howto = elf_mips_howto_table + R_MIPS_32;
6814
6815 /* On big-endian systems, we need to lie about the position
6816 of the reloc. */
6817 if (bfd_big_endian (input_bfd))
6818 rel->r_offset += 4;
6819 }
6820 else
6821 howto = mips_rtype_to_howto (r_type);
6822
6823 if (!use_saved_addend_p)
6824 {
6825 Elf_Internal_Shdr *rel_hdr;
6826
6827 /* If these relocations were originally of the REL variety,
6828 we must pull the addend out of the field that will be
6829 relocated. Otherwise, we simply use the contents of the
6830 RELA relocation. To determine which flavor or relocation
6831 this is, we depend on the fact that the INPUT_SECTION's
6832 REL_HDR is read before its REL_HDR2. */
6833 rel_hdr = &elf_section_data (input_section)->rel_hdr;
6834 if ((size_t) (rel - relocs)
6835 >= (NUM_SHDR_ENTRIES (rel_hdr) * bed->s->int_rels_per_ext_rel))
6836 rel_hdr = elf_section_data (input_section)->rel_hdr2;
6837 if (rel_hdr->sh_entsize == MIPS_ELF_REL_SIZE (input_bfd))
6838 {
6839 /* Note that this is a REL relocation. */
6840 rela_relocation_p = false;
6841
6842 /* Get the addend, which is stored in the input file. */
6843 addend = mips_elf_obtain_contents (howto,
6844 rel,
6845 input_bfd,
6846 contents);
6847 addend &= howto->src_mask;
6848
6849 /* For some kinds of relocations, the ADDEND is a
6850 combination of the addend stored in two different
6851 relocations. */
6852 if (r_type == R_MIPS_HI16
6853 || r_type == R_MIPS_GNU_REL_HI16
6854 || (r_type == R_MIPS_GOT16
6855 && mips_elf_local_relocation_p (input_bfd, rel,
6856 local_sections, false)))
6857 {
6858 bfd_vma l;
6859 const Elf_Internal_Rela *lo16_relocation;
6860 reloc_howto_type *lo16_howto;
6861 unsigned int lo;
6862
6863 /* The combined value is the sum of the HI16 addend,
6864 left-shifted by sixteen bits, and the LO16
6865 addend, sign extended. (Usually, the code does
6866 a `lui' of the HI16 value, and then an `addiu' of
6867 the LO16 value.)
6868
6869 Scan ahead to find a matching LO16 relocation. */
6870 if (r_type == R_MIPS_GNU_REL_HI16)
6871 lo = R_MIPS_GNU_REL_LO16;
6872 else
6873 lo = R_MIPS_LO16;
6874 lo16_relocation
6875 = mips_elf_next_relocation (lo, rel, relend);
6876 if (lo16_relocation == NULL)
6877 return false;
6878
6879 /* Obtain the addend kept there. */
6880 lo16_howto = mips_rtype_to_howto (lo);
6881 l = mips_elf_obtain_contents (lo16_howto,
6882 lo16_relocation,
6883 input_bfd, contents);
6884 l &= lo16_howto->src_mask;
6885 l = mips_elf_sign_extend (l, 16);
6886
6887 addend <<= 16;
6888
6889 /* Compute the combined addend. */
6890 addend += l;
6891 }
6892 else if (r_type == R_MIPS16_GPREL)
6893 {
6894 /* The addend is scrambled in the object file. See
6895 mips_elf_perform_relocation for details on the
6896 format. */
6897 addend = (((addend & 0x1f0000) >> 5)
6898 | ((addend & 0x7e00000) >> 16)
6899 | (addend & 0x1f));
6900 }
6901 }
6902 else
6903 addend = rel->r_addend;
6904 }
6905
6906 if (info->relocateable)
6907 {
6908 Elf_Internal_Sym *sym;
6909 unsigned long r_symndx;
6910
6911 if (r_type == R_MIPS_64 && !ABI_64_P (output_bfd)
6912 && bfd_big_endian (input_bfd))
6913 rel->r_offset -= 4;
6914
6915 /* Since we're just relocating, all we need to do is copy
6916 the relocations back out to the object file, unless
6917 they're against a section symbol, in which case we need
6918 to adjust by the section offset, or unless they're GP
6919 relative in which case we need to adjust by the amount
6920 that we're adjusting GP in this relocateable object. */
6921
6922 if (!mips_elf_local_relocation_p (input_bfd, rel, local_sections,
6923 false))
6924 /* There's nothing to do for non-local relocations. */
6925 continue;
6926
6927 if (r_type == R_MIPS16_GPREL
6928 || r_type == R_MIPS_GPREL16
6929 || r_type == R_MIPS_GPREL32
6930 || r_type == R_MIPS_LITERAL)
6931 addend -= (_bfd_get_gp_value (output_bfd)
6932 - _bfd_get_gp_value (input_bfd));
6933 else if (r_type == R_MIPS_26 || r_type == R_MIPS16_26
6934 || r_type == R_MIPS_GNU_REL16_S2)
6935 /* The addend is stored without its two least
6936 significant bits (which are always zero.) In a
6937 non-relocateable link, calculate_relocation will do
6938 this shift; here, we must do it ourselves. */
6939 addend <<= 2;
6940
6941 r_symndx = ELF32_R_SYM (rel->r_info);
6942 sym = local_syms + r_symndx;
6943 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
6944 /* Adjust the addend appropriately. */
6945 addend += local_sections[r_symndx]->output_offset;
6946
6947 /* If the relocation is for a R_MIPS_HI16 or R_MIPS_GOT16,
6948 then we only want to write out the high-order 16 bits.
6949 The subsequent R_MIPS_LO16 will handle the low-order bits. */
6950 if (r_type == R_MIPS_HI16 || r_type == R_MIPS_GOT16
6951 || r_type == R_MIPS_GNU_REL_HI16)
6952 addend = mips_elf_high (addend);
6953 /* If the relocation is for an R_MIPS_26 relocation, then
6954 the two low-order bits are not stored in the object file;
6955 they are implicitly zero. */
6956 else if (r_type == R_MIPS_26 || r_type == R_MIPS16_26
6957 || r_type == R_MIPS_GNU_REL16_S2)
6958 addend >>= 2;
6959
6960 if (rela_relocation_p)
6961 /* If this is a RELA relocation, just update the addend.
6962 We have to cast away constness for REL. */
6963 rel->r_addend = addend;
6964 else
6965 {
6966 /* Otherwise, we have to write the value back out. Note
6967 that we use the source mask, rather than the
6968 destination mask because the place to which we are
6969 writing will be source of the addend in the final
6970 link. */
6971 addend &= howto->src_mask;
6972
6973 if (r_type == R_MIPS_64 && !ABI_64_P (output_bfd))
6974 /* See the comment above about using R_MIPS_64 in the 32-bit
6975 ABI. Here, we need to update the addend. It would be
6976 possible to get away with just using the R_MIPS_32 reloc
6977 but for endianness. */
6978 {
6979 bfd_vma sign_bits;
6980 bfd_vma low_bits;
6981 bfd_vma high_bits;
6982
6983 if (addend & ((bfd_vma) 1 << 31))
6984 #ifdef BFD64
6985 sign_bits = ((bfd_vma) 1 << 32) - 1;
6986 #else
6987 sign_bits = -1;
6988 #endif
6989 else
6990 sign_bits = 0;
6991
6992 /* If we don't know that we have a 64-bit type,
6993 do two separate stores. */
6994 if (bfd_big_endian (input_bfd))
6995 {
6996 /* Store the sign-bits (which are most significant)
6997 first. */
6998 low_bits = sign_bits;
6999 high_bits = addend;
7000 }
7001 else
7002 {
7003 low_bits = addend;
7004 high_bits = sign_bits;
7005 }
7006 bfd_put_32 (input_bfd, low_bits,
7007 contents + rel->r_offset);
7008 bfd_put_32 (input_bfd, high_bits,
7009 contents + rel->r_offset + 4);
7010 continue;
7011 }
7012
7013 if (!mips_elf_perform_relocation (info, howto, rel, addend,
7014 input_bfd, input_section,
7015 contents, false))
7016 return false;
7017 }
7018
7019 /* Go on to the next relocation. */
7020 continue;
7021 }
7022
7023 /* In the N32 and 64-bit ABIs there may be multiple consecutive
7024 relocations for the same offset. In that case we are
7025 supposed to treat the output of each relocation as the addend
7026 for the next. */
7027 if (rel + 1 < relend
7028 && rel->r_offset == rel[1].r_offset
7029 && ELF32_R_TYPE (rel[1].r_info) != R_MIPS_NONE)
7030 use_saved_addend_p = true;
7031 else
7032 use_saved_addend_p = false;
7033
7034 /* Figure out what value we are supposed to relocate. */
7035 switch (mips_elf_calculate_relocation (output_bfd,
7036 input_bfd,
7037 input_section,
7038 info,
7039 rel,
7040 addend,
7041 howto,
7042 local_syms,
7043 local_sections,
7044 &value,
7045 &name,
7046 &require_jalx))
7047 {
7048 case bfd_reloc_continue:
7049 /* There's nothing to do. */
7050 continue;
7051
7052 case bfd_reloc_undefined:
7053 /* mips_elf_calculate_relocation already called the
7054 undefined_symbol callback. There's no real point in
7055 trying to perform the relocation at this point, so we
7056 just skip ahead to the next relocation. */
7057 continue;
7058
7059 case bfd_reloc_notsupported:
7060 msg = _("internal error: unsupported relocation error");
7061 info->callbacks->warning
7062 (info, msg, name, input_bfd, input_section, rel->r_offset);
7063 return false;
7064
7065 case bfd_reloc_overflow:
7066 if (use_saved_addend_p)
7067 /* Ignore overflow until we reach the last relocation for
7068 a given location. */
7069 ;
7070 else
7071 {
7072 BFD_ASSERT (name != NULL);
7073 if (! ((*info->callbacks->reloc_overflow)
7074 (info, name, howto->name, (bfd_vma) 0,
7075 input_bfd, input_section, rel->r_offset)))
7076 return false;
7077 }
7078 break;
7079
7080 case bfd_reloc_ok:
7081 break;
7082
7083 default:
7084 abort ();
7085 break;
7086 }
7087
7088 /* If we've got another relocation for the address, keep going
7089 until we reach the last one. */
7090 if (use_saved_addend_p)
7091 {
7092 addend = value;
7093 continue;
7094 }
7095
7096 if (r_type == R_MIPS_64 && !ABI_64_P (output_bfd))
7097 /* See the comment above about using R_MIPS_64 in the 32-bit
7098 ABI. Until now, we've been using the HOWTO for R_MIPS_32;
7099 that calculated the right value. Now, however, we
7100 sign-extend the 32-bit result to 64-bits, and store it as a
7101 64-bit value. We are especially generous here in that we
7102 go to extreme lengths to support this usage on systems with
7103 only a 32-bit VMA. */
7104 {
7105 bfd_vma sign_bits;
7106 bfd_vma low_bits;
7107 bfd_vma high_bits;
7108
7109 if (value & ((bfd_vma) 1 << 31))
7110 #ifdef BFD64
7111 sign_bits = ((bfd_vma) 1 << 32) - 1;
7112 #else
7113 sign_bits = -1;
7114 #endif
7115 else
7116 sign_bits = 0;
7117
7118 /* If we don't know that we have a 64-bit type,
7119 do two separate stores. */
7120 if (bfd_big_endian (input_bfd))
7121 {
7122 /* Undo what we did above. */
7123 rel->r_offset -= 4;
7124 /* Store the sign-bits (which are most significant)
7125 first. */
7126 low_bits = sign_bits;
7127 high_bits = value;
7128 }
7129 else
7130 {
7131 low_bits = value;
7132 high_bits = sign_bits;
7133 }
7134 bfd_put_32 (input_bfd, low_bits,
7135 contents + rel->r_offset);
7136 bfd_put_32 (input_bfd, high_bits,
7137 contents + rel->r_offset + 4);
7138 continue;
7139 }
7140
7141 /* Actually perform the relocation. */
7142 if (!mips_elf_perform_relocation (info, howto, rel, value, input_bfd,
7143 input_section, contents,
7144 require_jalx))
7145 return false;
7146 }
7147
7148 return true;
7149 }
7150
7151 /* This hook function is called before the linker writes out a global
7152 symbol. We mark symbols as small common if appropriate. This is
7153 also where we undo the increment of the value for a mips16 symbol. */
7154
7155 boolean
7156 _bfd_mips_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec)
7157 bfd *abfd ATTRIBUTE_UNUSED;
7158 struct bfd_link_info *info ATTRIBUTE_UNUSED;
7159 const char *name ATTRIBUTE_UNUSED;
7160 Elf_Internal_Sym *sym;
7161 asection *input_sec;
7162 {
7163 /* If we see a common symbol, which implies a relocatable link, then
7164 if a symbol was small common in an input file, mark it as small
7165 common in the output file. */
7166 if (sym->st_shndx == SHN_COMMON
7167 && strcmp (input_sec->name, ".scommon") == 0)
7168 sym->st_shndx = SHN_MIPS_SCOMMON;
7169
7170 if (sym->st_other == STO_MIPS16
7171 && (sym->st_value & 1) != 0)
7172 --sym->st_value;
7173
7174 return true;
7175 }
7176 \f
7177 /* Functions for the dynamic linker. */
7178
7179 /* The name of the dynamic interpreter. This is put in the .interp
7180 section. */
7181
7182 #define ELF_DYNAMIC_INTERPRETER(abfd) \
7183 (ABI_N32_P (abfd) ? "/usr/lib32/libc.so.1" \
7184 : ABI_64_P (abfd) ? "/usr/lib64/libc.so.1" \
7185 : "/usr/lib/libc.so.1")
7186
7187 /* Create dynamic sections when linking against a dynamic object. */
7188
7189 boolean
7190 _bfd_mips_elf_create_dynamic_sections (abfd, info)
7191 bfd *abfd;
7192 struct bfd_link_info *info;
7193 {
7194 struct elf_link_hash_entry *h;
7195 flagword flags;
7196 register asection *s;
7197 const char * const *namep;
7198
7199 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
7200 | SEC_LINKER_CREATED | SEC_READONLY);
7201
7202 /* Mips ABI requests the .dynamic section to be read only. */
7203 s = bfd_get_section_by_name (abfd, ".dynamic");
7204 if (s != NULL)
7205 {
7206 if (! bfd_set_section_flags (abfd, s, flags))
7207 return false;
7208 }
7209
7210 /* We need to create .got section. */
7211 if (! mips_elf_create_got_section (abfd, info))
7212 return false;
7213
7214 /* Create the .msym section on IRIX6. It is used by the dynamic
7215 linker to speed up dynamic relocations, and to avoid computing
7216 the ELF hash for symbols. */
7217 if (IRIX_COMPAT (abfd) == ict_irix6
7218 && !mips_elf_create_msym_section (abfd))
7219 return false;
7220
7221 /* Create .stub section. */
7222 if (bfd_get_section_by_name (abfd,
7223 MIPS_ELF_STUB_SECTION_NAME (abfd)) == NULL)
7224 {
7225 s = bfd_make_section (abfd, MIPS_ELF_STUB_SECTION_NAME (abfd));
7226 if (s == NULL
7227 || ! bfd_set_section_flags (abfd, s, flags | SEC_CODE)
7228 || ! bfd_set_section_alignment (abfd, s,
7229 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
7230 return false;
7231 }
7232
7233 if ((IRIX_COMPAT (abfd) == ict_irix5 || IRIX_COMPAT (abfd) == ict_none)
7234 && !info->shared
7235 && bfd_get_section_by_name (abfd, ".rld_map") == NULL)
7236 {
7237 s = bfd_make_section (abfd, ".rld_map");
7238 if (s == NULL
7239 || ! bfd_set_section_flags (abfd, s, flags &~ (flagword) SEC_READONLY)
7240 || ! bfd_set_section_alignment (abfd, s,
7241 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
7242 return false;
7243 }
7244
7245 /* On IRIX5, we adjust add some additional symbols and change the
7246 alignments of several sections. There is no ABI documentation
7247 indicating that this is necessary on IRIX6, nor any evidence that
7248 the linker takes such action. */
7249 if (IRIX_COMPAT (abfd) == ict_irix5)
7250 {
7251 for (namep = mips_elf_dynsym_rtproc_names; *namep != NULL; namep++)
7252 {
7253 h = NULL;
7254 if (! (_bfd_generic_link_add_one_symbol
7255 (info, abfd, *namep, BSF_GLOBAL, bfd_und_section_ptr,
7256 (bfd_vma) 0, (const char *) NULL, false,
7257 get_elf_backend_data (abfd)->collect,
7258 (struct bfd_link_hash_entry **) &h)))
7259 return false;
7260 h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
7261 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
7262 h->type = STT_SECTION;
7263
7264 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
7265 return false;
7266 }
7267
7268 /* We need to create a .compact_rel section. */
7269 if (SGI_COMPAT (abfd))
7270 {
7271 if (!mips_elf_create_compact_rel_section (abfd, info))
7272 return false;
7273 }
7274
7275 /* Change aligments of some sections. */
7276 s = bfd_get_section_by_name (abfd, ".hash");
7277 if (s != NULL)
7278 bfd_set_section_alignment (abfd, s, 4);
7279 s = bfd_get_section_by_name (abfd, ".dynsym");
7280 if (s != NULL)
7281 bfd_set_section_alignment (abfd, s, 4);
7282 s = bfd_get_section_by_name (abfd, ".dynstr");
7283 if (s != NULL)
7284 bfd_set_section_alignment (abfd, s, 4);
7285 s = bfd_get_section_by_name (abfd, ".reginfo");
7286 if (s != NULL)
7287 bfd_set_section_alignment (abfd, s, 4);
7288 s = bfd_get_section_by_name (abfd, ".dynamic");
7289 if (s != NULL)
7290 bfd_set_section_alignment (abfd, s, 4);
7291 }
7292
7293 if (!info->shared)
7294 {
7295 h = NULL;
7296 if (SGI_COMPAT (abfd))
7297 {
7298 if (!(_bfd_generic_link_add_one_symbol
7299 (info, abfd, "_DYNAMIC_LINK", BSF_GLOBAL, bfd_abs_section_ptr,
7300 (bfd_vma) 0, (const char *) NULL, false,
7301 get_elf_backend_data (abfd)->collect,
7302 (struct bfd_link_hash_entry **) &h)))
7303 return false;
7304 }
7305 else
7306 {
7307 /* For normal mips it is _DYNAMIC_LINKING. */
7308 if (!(_bfd_generic_link_add_one_symbol
7309 (info, abfd, "_DYNAMIC_LINKING", BSF_GLOBAL,
7310 bfd_abs_section_ptr, (bfd_vma) 0, (const char *) NULL, false,
7311 get_elf_backend_data (abfd)->collect,
7312 (struct bfd_link_hash_entry **) &h)))
7313 return false;
7314 }
7315 h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
7316 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
7317 h->type = STT_SECTION;
7318
7319 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
7320 return false;
7321
7322 if (! mips_elf_hash_table (info)->use_rld_obj_head)
7323 {
7324 /* __rld_map is a four byte word located in the .data section
7325 and is filled in by the rtld to contain a pointer to
7326 the _r_debug structure. Its symbol value will be set in
7327 mips_elf_finish_dynamic_symbol. */
7328 s = bfd_get_section_by_name (abfd, ".rld_map");
7329 BFD_ASSERT (s != NULL);
7330
7331 h = NULL;
7332 if (SGI_COMPAT (abfd))
7333 {
7334 if (!(_bfd_generic_link_add_one_symbol
7335 (info, abfd, "__rld_map", BSF_GLOBAL, s,
7336 (bfd_vma) 0, (const char *) NULL, false,
7337 get_elf_backend_data (abfd)->collect,
7338 (struct bfd_link_hash_entry **) &h)))
7339 return false;
7340 }
7341 else
7342 {
7343 /* For normal mips the symbol is __RLD_MAP. */
7344 if (!(_bfd_generic_link_add_one_symbol
7345 (info, abfd, "__RLD_MAP", BSF_GLOBAL, s,
7346 (bfd_vma) 0, (const char *) NULL, false,
7347 get_elf_backend_data (abfd)->collect,
7348 (struct bfd_link_hash_entry **) &h)))
7349 return false;
7350 }
7351 h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
7352 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
7353 h->type = STT_OBJECT;
7354
7355 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
7356 return false;
7357 }
7358 }
7359
7360 return true;
7361 }
7362
7363 /* Create the .compact_rel section. */
7364
7365 static boolean
7366 mips_elf_create_compact_rel_section (abfd, info)
7367 bfd *abfd;
7368 struct bfd_link_info *info ATTRIBUTE_UNUSED;
7369 {
7370 flagword flags;
7371 register asection *s;
7372
7373 if (bfd_get_section_by_name (abfd, ".compact_rel") == NULL)
7374 {
7375 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED
7376 | SEC_READONLY);
7377
7378 s = bfd_make_section (abfd, ".compact_rel");
7379 if (s == NULL
7380 || ! bfd_set_section_flags (abfd, s, flags)
7381 || ! bfd_set_section_alignment (abfd, s,
7382 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
7383 return false;
7384
7385 s->_raw_size = sizeof (Elf32_External_compact_rel);
7386 }
7387
7388 return true;
7389 }
7390
7391 /* Create the .got section to hold the global offset table. */
7392
7393 static boolean
7394 mips_elf_create_got_section (abfd, info)
7395 bfd *abfd;
7396 struct bfd_link_info *info;
7397 {
7398 flagword flags;
7399 register asection *s;
7400 struct elf_link_hash_entry *h;
7401 struct mips_got_info *g;
7402 bfd_size_type amt;
7403
7404 /* This function may be called more than once. */
7405 if (mips_elf_got_section (abfd))
7406 return true;
7407
7408 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
7409 | SEC_LINKER_CREATED);
7410
7411 s = bfd_make_section (abfd, ".got");
7412 if (s == NULL
7413 || ! bfd_set_section_flags (abfd, s, flags)
7414 || ! bfd_set_section_alignment (abfd, s, 4))
7415 return false;
7416
7417 /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the
7418 linker script because we don't want to define the symbol if we
7419 are not creating a global offset table. */
7420 h = NULL;
7421 if (! (_bfd_generic_link_add_one_symbol
7422 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
7423 (bfd_vma) 0, (const char *) NULL, false,
7424 get_elf_backend_data (abfd)->collect,
7425 (struct bfd_link_hash_entry **) &h)))
7426 return false;
7427 h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
7428 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
7429 h->type = STT_OBJECT;
7430
7431 if (info->shared
7432 && ! bfd_elf32_link_record_dynamic_symbol (info, h))
7433 return false;
7434
7435 /* The first several global offset table entries are reserved. */
7436 s->_raw_size = MIPS_RESERVED_GOTNO * MIPS_ELF_GOT_SIZE (abfd);
7437
7438 amt = sizeof (struct mips_got_info);
7439 g = (struct mips_got_info *) bfd_alloc (abfd, amt);
7440 if (g == NULL)
7441 return false;
7442 g->global_gotsym = NULL;
7443 g->local_gotno = MIPS_RESERVED_GOTNO;
7444 g->assigned_gotno = MIPS_RESERVED_GOTNO;
7445 if (elf_section_data (s) == NULL)
7446 {
7447 amt = sizeof (struct bfd_elf_section_data);
7448 s->used_by_bfd = (PTR) bfd_zalloc (abfd, amt);
7449 if (elf_section_data (s) == NULL)
7450 return false;
7451 }
7452 elf_section_data (s)->tdata = (PTR) g;
7453 elf_section_data (s)->this_hdr.sh_flags
7454 |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
7455
7456 return true;
7457 }
7458
7459 /* Returns the .msym section for ABFD, creating it if it does not
7460 already exist. Returns NULL to indicate error. */
7461
7462 static asection *
7463 mips_elf_create_msym_section (abfd)
7464 bfd *abfd;
7465 {
7466 asection *s;
7467
7468 s = bfd_get_section_by_name (abfd, MIPS_ELF_MSYM_SECTION_NAME (abfd));
7469 if (!s)
7470 {
7471 s = bfd_make_section (abfd, MIPS_ELF_MSYM_SECTION_NAME (abfd));
7472 if (!s
7473 || !bfd_set_section_flags (abfd, s,
7474 SEC_ALLOC
7475 | SEC_LOAD
7476 | SEC_HAS_CONTENTS
7477 | SEC_LINKER_CREATED
7478 | SEC_READONLY)
7479 || !bfd_set_section_alignment (abfd, s,
7480 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
7481 return NULL;
7482 }
7483
7484 return s;
7485 }
7486
7487 /* Add room for N relocations to the .rel.dyn section in ABFD. */
7488
7489 static void
7490 mips_elf_allocate_dynamic_relocations (abfd, n)
7491 bfd *abfd;
7492 unsigned int n;
7493 {
7494 asection *s;
7495
7496 s = bfd_get_section_by_name (abfd, MIPS_ELF_REL_DYN_SECTION_NAME (abfd));
7497 BFD_ASSERT (s != NULL);
7498
7499 if (s->_raw_size == 0)
7500 {
7501 /* Make room for a null element. */
7502 s->_raw_size += MIPS_ELF_REL_SIZE (abfd);
7503 ++s->reloc_count;
7504 }
7505 s->_raw_size += n * MIPS_ELF_REL_SIZE (abfd);
7506 }
7507
7508 /* Look through the relocs for a section during the first phase, and
7509 allocate space in the global offset table. */
7510
7511 boolean
7512 _bfd_mips_elf_check_relocs (abfd, info, sec, relocs)
7513 bfd *abfd;
7514 struct bfd_link_info *info;
7515 asection *sec;
7516 const Elf_Internal_Rela *relocs;
7517 {
7518 const char *name;
7519 bfd *dynobj;
7520 Elf_Internal_Shdr *symtab_hdr;
7521 struct elf_link_hash_entry **sym_hashes;
7522 struct mips_got_info *g;
7523 size_t extsymoff;
7524 const Elf_Internal_Rela *rel;
7525 const Elf_Internal_Rela *rel_end;
7526 asection *sgot;
7527 asection *sreloc;
7528 struct elf_backend_data *bed;
7529
7530 if (info->relocateable)
7531 return true;
7532
7533 dynobj = elf_hash_table (info)->dynobj;
7534 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7535 sym_hashes = elf_sym_hashes (abfd);
7536 extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info;
7537
7538 /* Check for the mips16 stub sections. */
7539
7540 name = bfd_get_section_name (abfd, sec);
7541 if (strncmp (name, FN_STUB, sizeof FN_STUB - 1) == 0)
7542 {
7543 unsigned long r_symndx;
7544
7545 /* Look at the relocation information to figure out which symbol
7546 this is for. */
7547
7548 r_symndx = ELF32_R_SYM (relocs->r_info);
7549
7550 if (r_symndx < extsymoff
7551 || sym_hashes[r_symndx - extsymoff] == NULL)
7552 {
7553 asection *o;
7554
7555 /* This stub is for a local symbol. This stub will only be
7556 needed if there is some relocation in this BFD, other
7557 than a 16 bit function call, which refers to this symbol. */
7558 for (o = abfd->sections; o != NULL; o = o->next)
7559 {
7560 Elf_Internal_Rela *sec_relocs;
7561 const Elf_Internal_Rela *r, *rend;
7562
7563 /* We can ignore stub sections when looking for relocs. */
7564 if ((o->flags & SEC_RELOC) == 0
7565 || o->reloc_count == 0
7566 || strncmp (bfd_get_section_name (abfd, o), FN_STUB,
7567 sizeof FN_STUB - 1) == 0
7568 || strncmp (bfd_get_section_name (abfd, o), CALL_STUB,
7569 sizeof CALL_STUB - 1) == 0
7570 || strncmp (bfd_get_section_name (abfd, o), CALL_FP_STUB,
7571 sizeof CALL_FP_STUB - 1) == 0)
7572 continue;
7573
7574 sec_relocs = (_bfd_elf32_link_read_relocs
7575 (abfd, o, (PTR) NULL,
7576 (Elf_Internal_Rela *) NULL,
7577 info->keep_memory));
7578 if (sec_relocs == NULL)
7579 return false;
7580
7581 rend = sec_relocs + o->reloc_count;
7582 for (r = sec_relocs; r < rend; r++)
7583 if (ELF32_R_SYM (r->r_info) == r_symndx
7584 && ELF32_R_TYPE (r->r_info) != R_MIPS16_26)
7585 break;
7586
7587 if (! info->keep_memory)
7588 free (sec_relocs);
7589
7590 if (r < rend)
7591 break;
7592 }
7593
7594 if (o == NULL)
7595 {
7596 /* There is no non-call reloc for this stub, so we do
7597 not need it. Since this function is called before
7598 the linker maps input sections to output sections, we
7599 can easily discard it by setting the SEC_EXCLUDE
7600 flag. */
7601 sec->flags |= SEC_EXCLUDE;
7602 return true;
7603 }
7604
7605 /* Record this stub in an array of local symbol stubs for
7606 this BFD. */
7607 if (elf_tdata (abfd)->local_stubs == NULL)
7608 {
7609 unsigned long symcount;
7610 asection **n;
7611 bfd_size_type amt;
7612
7613 if (elf_bad_symtab (abfd))
7614 symcount = NUM_SHDR_ENTRIES (symtab_hdr);
7615 else
7616 symcount = symtab_hdr->sh_info;
7617 amt = symcount * sizeof (asection *);
7618 n = (asection **) bfd_zalloc (abfd, amt);
7619 if (n == NULL)
7620 return false;
7621 elf_tdata (abfd)->local_stubs = n;
7622 }
7623
7624 elf_tdata (abfd)->local_stubs[r_symndx] = sec;
7625
7626 /* We don't need to set mips16_stubs_seen in this case.
7627 That flag is used to see whether we need to look through
7628 the global symbol table for stubs. We don't need to set
7629 it here, because we just have a local stub. */
7630 }
7631 else
7632 {
7633 struct mips_elf_link_hash_entry *h;
7634
7635 h = ((struct mips_elf_link_hash_entry *)
7636 sym_hashes[r_symndx - extsymoff]);
7637
7638 /* H is the symbol this stub is for. */
7639
7640 h->fn_stub = sec;
7641 mips_elf_hash_table (info)->mips16_stubs_seen = true;
7642 }
7643 }
7644 else if (strncmp (name, CALL_STUB, sizeof CALL_STUB - 1) == 0
7645 || strncmp (name, CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0)
7646 {
7647 unsigned long r_symndx;
7648 struct mips_elf_link_hash_entry *h;
7649 asection **loc;
7650
7651 /* Look at the relocation information to figure out which symbol
7652 this is for. */
7653
7654 r_symndx = ELF32_R_SYM (relocs->r_info);
7655
7656 if (r_symndx < extsymoff
7657 || sym_hashes[r_symndx - extsymoff] == NULL)
7658 {
7659 /* This stub was actually built for a static symbol defined
7660 in the same file. We assume that all static symbols in
7661 mips16 code are themselves mips16, so we can simply
7662 discard this stub. Since this function is called before
7663 the linker maps input sections to output sections, we can
7664 easily discard it by setting the SEC_EXCLUDE flag. */
7665 sec->flags |= SEC_EXCLUDE;
7666 return true;
7667 }
7668
7669 h = ((struct mips_elf_link_hash_entry *)
7670 sym_hashes[r_symndx - extsymoff]);
7671
7672 /* H is the symbol this stub is for. */
7673
7674 if (strncmp (name, CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0)
7675 loc = &h->call_fp_stub;
7676 else
7677 loc = &h->call_stub;
7678
7679 /* If we already have an appropriate stub for this function, we
7680 don't need another one, so we can discard this one. Since
7681 this function is called before the linker maps input sections
7682 to output sections, we can easily discard it by setting the
7683 SEC_EXCLUDE flag. We can also discard this section if we
7684 happen to already know that this is a mips16 function; it is
7685 not necessary to check this here, as it is checked later, but
7686 it is slightly faster to check now. */
7687 if (*loc != NULL || h->root.other == STO_MIPS16)
7688 {
7689 sec->flags |= SEC_EXCLUDE;
7690 return true;
7691 }
7692
7693 *loc = sec;
7694 mips_elf_hash_table (info)->mips16_stubs_seen = true;
7695 }
7696
7697 if (dynobj == NULL)
7698 {
7699 sgot = NULL;
7700 g = NULL;
7701 }
7702 else
7703 {
7704 sgot = mips_elf_got_section (dynobj);
7705 if (sgot == NULL)
7706 g = NULL;
7707 else
7708 {
7709 BFD_ASSERT (elf_section_data (sgot) != NULL);
7710 g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
7711 BFD_ASSERT (g != NULL);
7712 }
7713 }
7714
7715 sreloc = NULL;
7716 bed = get_elf_backend_data (abfd);
7717 rel_end = relocs + sec->reloc_count * bed->s->int_rels_per_ext_rel;
7718 for (rel = relocs; rel < rel_end; ++rel)
7719 {
7720 unsigned long r_symndx;
7721 unsigned int r_type;
7722 struct elf_link_hash_entry *h;
7723
7724 r_symndx = ELF32_R_SYM (rel->r_info);
7725 r_type = ELF32_R_TYPE (rel->r_info);
7726
7727 if (r_symndx < extsymoff)
7728 h = NULL;
7729 else if (r_symndx >= extsymoff + NUM_SHDR_ENTRIES (symtab_hdr))
7730 {
7731 (*_bfd_error_handler)
7732 (_("%s: Malformed reloc detected for section %s"),
7733 bfd_archive_filename (abfd), name);
7734 bfd_set_error (bfd_error_bad_value);
7735 return false;
7736 }
7737 else
7738 {
7739 h = sym_hashes[r_symndx - extsymoff];
7740
7741 /* This may be an indirect symbol created because of a version. */
7742 if (h != NULL)
7743 {
7744 while (h->root.type == bfd_link_hash_indirect)
7745 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7746 }
7747 }
7748
7749 /* Some relocs require a global offset table. */
7750 if (dynobj == NULL || sgot == NULL)
7751 {
7752 switch (r_type)
7753 {
7754 case R_MIPS_GOT16:
7755 case R_MIPS_CALL16:
7756 case R_MIPS_CALL_HI16:
7757 case R_MIPS_CALL_LO16:
7758 case R_MIPS_GOT_HI16:
7759 case R_MIPS_GOT_LO16:
7760 case R_MIPS_GOT_PAGE:
7761 case R_MIPS_GOT_OFST:
7762 case R_MIPS_GOT_DISP:
7763 if (dynobj == NULL)
7764 elf_hash_table (info)->dynobj = dynobj = abfd;
7765 if (! mips_elf_create_got_section (dynobj, info))
7766 return false;
7767 g = mips_elf_got_info (dynobj, &sgot);
7768 break;
7769
7770 case R_MIPS_32:
7771 case R_MIPS_REL32:
7772 case R_MIPS_64:
7773 if (dynobj == NULL
7774 && (info->shared || h != NULL)
7775 && (sec->flags & SEC_ALLOC) != 0)
7776 elf_hash_table (info)->dynobj = dynobj = abfd;
7777 break;
7778
7779 default:
7780 break;
7781 }
7782 }
7783
7784 if (!h && (r_type == R_MIPS_CALL_LO16
7785 || r_type == R_MIPS_GOT_LO16
7786 || r_type == R_MIPS_GOT_DISP))
7787 {
7788 /* We may need a local GOT entry for this relocation. We
7789 don't count R_MIPS_GOT_PAGE because we can estimate the
7790 maximum number of pages needed by looking at the size of
7791 the segment. Similar comments apply to R_MIPS_GOT16 and
7792 R_MIPS_CALL16. We don't count R_MIPS_GOT_HI16, or
7793 R_MIPS_CALL_HI16 because these are always followed by an
7794 R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16.
7795
7796 This estimation is very conservative since we can merge
7797 duplicate entries in the GOT. In order to be less
7798 conservative, we could actually build the GOT here,
7799 rather than in relocate_section. */
7800 g->local_gotno++;
7801 sgot->_raw_size += MIPS_ELF_GOT_SIZE (dynobj);
7802 }
7803
7804 switch (r_type)
7805 {
7806 case R_MIPS_CALL16:
7807 if (h == NULL)
7808 {
7809 (*_bfd_error_handler)
7810 (_("%s: CALL16 reloc at 0x%lx not against global symbol"),
7811 bfd_archive_filename (abfd), (unsigned long) rel->r_offset);
7812 bfd_set_error (bfd_error_bad_value);
7813 return false;
7814 }
7815 /* Fall through. */
7816
7817 case R_MIPS_CALL_HI16:
7818 case R_MIPS_CALL_LO16:
7819 if (h != NULL)
7820 {
7821 /* This symbol requires a global offset table entry. */
7822 if (!mips_elf_record_global_got_symbol (h, info, g))
7823 return false;
7824
7825 /* We need a stub, not a plt entry for the undefined
7826 function. But we record it as if it needs plt. See
7827 elf_adjust_dynamic_symbol in elflink.h. */
7828 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
7829 h->type = STT_FUNC;
7830 }
7831 break;
7832
7833 case R_MIPS_GOT16:
7834 case R_MIPS_GOT_HI16:
7835 case R_MIPS_GOT_LO16:
7836 case R_MIPS_GOT_DISP:
7837 /* This symbol requires a global offset table entry. */
7838 if (h && !mips_elf_record_global_got_symbol (h, info, g))
7839 return false;
7840 break;
7841
7842 case R_MIPS_32:
7843 case R_MIPS_REL32:
7844 case R_MIPS_64:
7845 if ((info->shared || h != NULL)
7846 && (sec->flags & SEC_ALLOC) != 0)
7847 {
7848 if (sreloc == NULL)
7849 {
7850 const char *dname = MIPS_ELF_REL_DYN_SECTION_NAME (dynobj);
7851
7852 sreloc = bfd_get_section_by_name (dynobj, dname);
7853 if (sreloc == NULL)
7854 {
7855 sreloc = bfd_make_section (dynobj, dname);
7856 if (sreloc == NULL
7857 || ! bfd_set_section_flags (dynobj, sreloc,
7858 (SEC_ALLOC
7859 | SEC_LOAD
7860 | SEC_HAS_CONTENTS
7861 | SEC_IN_MEMORY
7862 | SEC_LINKER_CREATED
7863 | SEC_READONLY))
7864 || ! bfd_set_section_alignment (dynobj, sreloc,
7865 4))
7866 return false;
7867 }
7868 }
7869 #define MIPS_READONLY_SECTION (SEC_ALLOC | SEC_LOAD | SEC_READONLY)
7870 if (info->shared)
7871 {
7872 /* When creating a shared object, we must copy these
7873 reloc types into the output file as R_MIPS_REL32
7874 relocs. We make room for this reloc in the
7875 .rel.dyn reloc section. */
7876 mips_elf_allocate_dynamic_relocations (dynobj, 1);
7877 if ((sec->flags & MIPS_READONLY_SECTION)
7878 == MIPS_READONLY_SECTION)
7879 /* We tell the dynamic linker that there are
7880 relocations against the text segment. */
7881 info->flags |= DF_TEXTREL;
7882 }
7883 else
7884 {
7885 struct mips_elf_link_hash_entry *hmips;
7886
7887 /* We only need to copy this reloc if the symbol is
7888 defined in a dynamic object. */
7889 hmips = (struct mips_elf_link_hash_entry *) h;
7890 ++hmips->possibly_dynamic_relocs;
7891 if ((sec->flags & MIPS_READONLY_SECTION)
7892 == MIPS_READONLY_SECTION)
7893 /* We need it to tell the dynamic linker if there
7894 are relocations against the text segment. */
7895 hmips->readonly_reloc = true;
7896 }
7897
7898 /* Even though we don't directly need a GOT entry for
7899 this symbol, a symbol must have a dynamic symbol
7900 table index greater that DT_MIPS_GOTSYM if there are
7901 dynamic relocations against it. */
7902 if (h != NULL
7903 && !mips_elf_record_global_got_symbol (h, info, g))
7904 return false;
7905 }
7906
7907 if (SGI_COMPAT (abfd))
7908 mips_elf_hash_table (info)->compact_rel_size +=
7909 sizeof (Elf32_External_crinfo);
7910 break;
7911
7912 case R_MIPS_26:
7913 case R_MIPS_GPREL16:
7914 case R_MIPS_LITERAL:
7915 case R_MIPS_GPREL32:
7916 if (SGI_COMPAT (abfd))
7917 mips_elf_hash_table (info)->compact_rel_size +=
7918 sizeof (Elf32_External_crinfo);
7919 break;
7920
7921 /* This relocation describes the C++ object vtable hierarchy.
7922 Reconstruct it for later use during GC. */
7923 case R_MIPS_GNU_VTINHERIT:
7924 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
7925 return false;
7926 break;
7927
7928 /* This relocation describes which C++ vtable entries are actually
7929 used. Record for later use during GC. */
7930 case R_MIPS_GNU_VTENTRY:
7931 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
7932 return false;
7933 break;
7934
7935 default:
7936 break;
7937 }
7938
7939 /* We must not create a stub for a symbol that has relocations
7940 related to taking the function's address. */
7941 switch (r_type)
7942 {
7943 default:
7944 if (h != NULL)
7945 {
7946 struct mips_elf_link_hash_entry *mh;
7947
7948 mh = (struct mips_elf_link_hash_entry *) h;
7949 mh->no_fn_stub = true;
7950 }
7951 break;
7952 case R_MIPS_CALL16:
7953 case R_MIPS_CALL_HI16:
7954 case R_MIPS_CALL_LO16:
7955 break;
7956 }
7957
7958 /* If this reloc is not a 16 bit call, and it has a global
7959 symbol, then we will need the fn_stub if there is one.
7960 References from a stub section do not count. */
7961 if (h != NULL
7962 && r_type != R_MIPS16_26
7963 && strncmp (bfd_get_section_name (abfd, sec), FN_STUB,
7964 sizeof FN_STUB - 1) != 0
7965 && strncmp (bfd_get_section_name (abfd, sec), CALL_STUB,
7966 sizeof CALL_STUB - 1) != 0
7967 && strncmp (bfd_get_section_name (abfd, sec), CALL_FP_STUB,
7968 sizeof CALL_FP_STUB - 1) != 0)
7969 {
7970 struct mips_elf_link_hash_entry *mh;
7971
7972 mh = (struct mips_elf_link_hash_entry *) h;
7973 mh->need_fn_stub = true;
7974 }
7975 }
7976
7977 return true;
7978 }
7979
7980 /* Return the section that should be marked against GC for a given
7981 relocation. */
7982
7983 asection *
7984 _bfd_mips_elf_gc_mark_hook (abfd, info, rel, h, sym)
7985 bfd *abfd;
7986 struct bfd_link_info *info ATTRIBUTE_UNUSED;
7987 Elf_Internal_Rela *rel;
7988 struct elf_link_hash_entry *h;
7989 Elf_Internal_Sym *sym;
7990 {
7991 /* ??? Do mips16 stub sections need to be handled special? */
7992
7993 if (h != NULL)
7994 {
7995 switch (ELF32_R_TYPE (rel->r_info))
7996 {
7997 case R_MIPS_GNU_VTINHERIT:
7998 case R_MIPS_GNU_VTENTRY:
7999 break;
8000
8001 default:
8002 switch (h->root.type)
8003 {
8004 case bfd_link_hash_defined:
8005 case bfd_link_hash_defweak:
8006 return h->root.u.def.section;
8007
8008 case bfd_link_hash_common:
8009 return h->root.u.c.p->section;
8010
8011 default:
8012 break;
8013 }
8014 }
8015 }
8016 else
8017 {
8018 if (!(elf_bad_symtab (abfd)
8019 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
8020 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
8021 && sym->st_shndx != SHN_COMMON))
8022 {
8023 return bfd_section_from_elf_index (abfd, sym->st_shndx);
8024 }
8025 }
8026
8027 return NULL;
8028 }
8029
8030 /* Update the got entry reference counts for the section being removed. */
8031
8032 boolean
8033 _bfd_mips_elf_gc_sweep_hook (abfd, info, sec, relocs)
8034 bfd *abfd ATTRIBUTE_UNUSED;
8035 struct bfd_link_info *info ATTRIBUTE_UNUSED;
8036 asection *sec ATTRIBUTE_UNUSED;
8037 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
8038 {
8039 #if 0
8040 Elf_Internal_Shdr *symtab_hdr;
8041 struct elf_link_hash_entry **sym_hashes;
8042 bfd_signed_vma *local_got_refcounts;
8043 const Elf_Internal_Rela *rel, *relend;
8044 unsigned long r_symndx;
8045 struct elf_link_hash_entry *h;
8046
8047 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
8048 sym_hashes = elf_sym_hashes (abfd);
8049 local_got_refcounts = elf_local_got_refcounts (abfd);
8050
8051 relend = relocs + sec->reloc_count;
8052 for (rel = relocs; rel < relend; rel++)
8053 switch (ELF32_R_TYPE (rel->r_info))
8054 {
8055 case R_MIPS_GOT16:
8056 case R_MIPS_CALL16:
8057 case R_MIPS_CALL_HI16:
8058 case R_MIPS_CALL_LO16:
8059 case R_MIPS_GOT_HI16:
8060 case R_MIPS_GOT_LO16:
8061 /* ??? It would seem that the existing MIPS code does no sort
8062 of reference counting or whatnot on its GOT and PLT entries,
8063 so it is not possible to garbage collect them at this time. */
8064 break;
8065
8066 default:
8067 break;
8068 }
8069 #endif
8070
8071 return true;
8072 }
8073
8074 /* Copy data from a MIPS ELF indirect symbol to its direct symbol,
8075 hiding the old indirect symbol. Process additional relocation
8076 information. */
8077
8078 static void
8079 _bfd_mips_elf_copy_indirect_symbol (dir, ind)
8080 struct elf_link_hash_entry *dir, *ind;
8081 {
8082 struct mips_elf_link_hash_entry *dirmips, *indmips;
8083
8084 _bfd_elf_link_hash_copy_indirect (dir, ind);
8085
8086 dirmips = (struct mips_elf_link_hash_entry *) dir;
8087 indmips = (struct mips_elf_link_hash_entry *) ind;
8088 dirmips->possibly_dynamic_relocs += indmips->possibly_dynamic_relocs;
8089 if (indmips->readonly_reloc)
8090 dirmips->readonly_reloc = true;
8091 if (dirmips->min_dyn_reloc_index == 0
8092 || (indmips->min_dyn_reloc_index != 0
8093 && indmips->min_dyn_reloc_index < dirmips->min_dyn_reloc_index))
8094 dirmips->min_dyn_reloc_index = indmips->min_dyn_reloc_index;
8095 if (indmips->no_fn_stub)
8096 dirmips->no_fn_stub = true;
8097 }
8098
8099 /* Adjust a symbol defined by a dynamic object and referenced by a
8100 regular object. The current definition is in some section of the
8101 dynamic object, but we're not including those sections. We have to
8102 change the definition to something the rest of the link can
8103 understand. */
8104
8105 boolean
8106 _bfd_mips_elf_adjust_dynamic_symbol (info, h)
8107 struct bfd_link_info *info;
8108 struct elf_link_hash_entry *h;
8109 {
8110 bfd *dynobj;
8111 struct mips_elf_link_hash_entry *hmips;
8112 asection *s;
8113
8114 dynobj = elf_hash_table (info)->dynobj;
8115
8116 /* Make sure we know what is going on here. */
8117 BFD_ASSERT (dynobj != NULL
8118 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
8119 || h->weakdef != NULL
8120 || ((h->elf_link_hash_flags
8121 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8122 && (h->elf_link_hash_flags
8123 & ELF_LINK_HASH_REF_REGULAR) != 0
8124 && (h->elf_link_hash_flags
8125 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
8126
8127 /* If this symbol is defined in a dynamic object, we need to copy
8128 any R_MIPS_32 or R_MIPS_REL32 relocs against it into the output
8129 file. */
8130 hmips = (struct mips_elf_link_hash_entry *) h;
8131 if (! info->relocateable
8132 && hmips->possibly_dynamic_relocs != 0
8133 && (h->root.type == bfd_link_hash_defweak
8134 || (h->elf_link_hash_flags
8135 & ELF_LINK_HASH_DEF_REGULAR) == 0))
8136 {
8137 mips_elf_allocate_dynamic_relocations (dynobj,
8138 hmips->possibly_dynamic_relocs);
8139 if (hmips->readonly_reloc)
8140 /* We tell the dynamic linker that there are relocations
8141 against the text segment. */
8142 info->flags |= DF_TEXTREL;
8143 }
8144
8145 /* For a function, create a stub, if allowed. */
8146 if (! hmips->no_fn_stub
8147 && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
8148 {
8149 if (! elf_hash_table (info)->dynamic_sections_created)
8150 return true;
8151
8152 /* If this symbol is not defined in a regular file, then set
8153 the symbol to the stub location. This is required to make
8154 function pointers compare as equal between the normal
8155 executable and the shared library. */
8156 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
8157 {
8158 /* We need .stub section. */
8159 s = bfd_get_section_by_name (dynobj,
8160 MIPS_ELF_STUB_SECTION_NAME (dynobj));
8161 BFD_ASSERT (s != NULL);
8162
8163 h->root.u.def.section = s;
8164 h->root.u.def.value = s->_raw_size;
8165
8166 /* XXX Write this stub address somewhere. */
8167 h->plt.offset = s->_raw_size;
8168
8169 /* Make room for this stub code. */
8170 s->_raw_size += MIPS_FUNCTION_STUB_SIZE;
8171
8172 /* The last half word of the stub will be filled with the index
8173 of this symbol in .dynsym section. */
8174 return true;
8175 }
8176 }
8177 else if ((h->type == STT_FUNC)
8178 && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0)
8179 {
8180 /* This will set the entry for this symbol in the GOT to 0, and
8181 the dynamic linker will take care of this. */
8182 h->root.u.def.value = 0;
8183 return true;
8184 }
8185
8186 /* If this is a weak symbol, and there is a real definition, the
8187 processor independent code will have arranged for us to see the
8188 real definition first, and we can just use the same value. */
8189 if (h->weakdef != NULL)
8190 {
8191 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
8192 || h->weakdef->root.type == bfd_link_hash_defweak);
8193 h->root.u.def.section = h->weakdef->root.u.def.section;
8194 h->root.u.def.value = h->weakdef->root.u.def.value;
8195 return true;
8196 }
8197
8198 /* This is a reference to a symbol defined by a dynamic object which
8199 is not a function. */
8200
8201 return true;
8202 }
8203
8204 /* This function is called after all the input files have been read,
8205 and the input sections have been assigned to output sections. We
8206 check for any mips16 stub sections that we can discard. */
8207
8208 static boolean mips_elf_check_mips16_stubs
8209 PARAMS ((struct mips_elf_link_hash_entry *, PTR));
8210
8211 boolean
8212 _bfd_mips_elf_always_size_sections (output_bfd, info)
8213 bfd *output_bfd;
8214 struct bfd_link_info *info;
8215 {
8216 asection *ri;
8217
8218 /* The .reginfo section has a fixed size. */
8219 ri = bfd_get_section_by_name (output_bfd, ".reginfo");
8220 if (ri != NULL)
8221 bfd_set_section_size (output_bfd, ri,
8222 (bfd_size_type) sizeof (Elf32_External_RegInfo));
8223
8224 if (info->relocateable
8225 || ! mips_elf_hash_table (info)->mips16_stubs_seen)
8226 return true;
8227
8228 mips_elf_link_hash_traverse (mips_elf_hash_table (info),
8229 mips_elf_check_mips16_stubs,
8230 (PTR) NULL);
8231
8232 return true;
8233 }
8234
8235 /* Check the mips16 stubs for a particular symbol, and see if we can
8236 discard them. */
8237
8238 static boolean
8239 mips_elf_check_mips16_stubs (h, data)
8240 struct mips_elf_link_hash_entry *h;
8241 PTR data ATTRIBUTE_UNUSED;
8242 {
8243 if (h->fn_stub != NULL
8244 && ! h->need_fn_stub)
8245 {
8246 /* We don't need the fn_stub; the only references to this symbol
8247 are 16 bit calls. Clobber the size to 0 to prevent it from
8248 being included in the link. */
8249 h->fn_stub->_raw_size = 0;
8250 h->fn_stub->_cooked_size = 0;
8251 h->fn_stub->flags &= ~SEC_RELOC;
8252 h->fn_stub->reloc_count = 0;
8253 h->fn_stub->flags |= SEC_EXCLUDE;
8254 }
8255
8256 if (h->call_stub != NULL
8257 && h->root.other == STO_MIPS16)
8258 {
8259 /* We don't need the call_stub; this is a 16 bit function, so
8260 calls from other 16 bit functions are OK. Clobber the size
8261 to 0 to prevent it from being included in the link. */
8262 h->call_stub->_raw_size = 0;
8263 h->call_stub->_cooked_size = 0;
8264 h->call_stub->flags &= ~SEC_RELOC;
8265 h->call_stub->reloc_count = 0;
8266 h->call_stub->flags |= SEC_EXCLUDE;
8267 }
8268
8269 if (h->call_fp_stub != NULL
8270 && h->root.other == STO_MIPS16)
8271 {
8272 /* We don't need the call_stub; this is a 16 bit function, so
8273 calls from other 16 bit functions are OK. Clobber the size
8274 to 0 to prevent it from being included in the link. */
8275 h->call_fp_stub->_raw_size = 0;
8276 h->call_fp_stub->_cooked_size = 0;
8277 h->call_fp_stub->flags &= ~SEC_RELOC;
8278 h->call_fp_stub->reloc_count = 0;
8279 h->call_fp_stub->flags |= SEC_EXCLUDE;
8280 }
8281
8282 return true;
8283 }
8284
8285 /* Set the sizes of the dynamic sections. */
8286
8287 boolean
8288 _bfd_mips_elf_size_dynamic_sections (output_bfd, info)
8289 bfd *output_bfd;
8290 struct bfd_link_info *info;
8291 {
8292 bfd *dynobj;
8293 asection *s;
8294 boolean reltext;
8295 struct mips_got_info *g = NULL;
8296
8297 dynobj = elf_hash_table (info)->dynobj;
8298 BFD_ASSERT (dynobj != NULL);
8299
8300 if (elf_hash_table (info)->dynamic_sections_created)
8301 {
8302 /* Set the contents of the .interp section to the interpreter. */
8303 if (! info->shared)
8304 {
8305 s = bfd_get_section_by_name (dynobj, ".interp");
8306 BFD_ASSERT (s != NULL);
8307 s->_raw_size
8308 = strlen (ELF_DYNAMIC_INTERPRETER (output_bfd)) + 1;
8309 s->contents
8310 = (bfd_byte *) ELF_DYNAMIC_INTERPRETER (output_bfd);
8311 }
8312 }
8313
8314 /* The check_relocs and adjust_dynamic_symbol entry points have
8315 determined the sizes of the various dynamic sections. Allocate
8316 memory for them. */
8317 reltext = false;
8318 for (s = dynobj->sections; s != NULL; s = s->next)
8319 {
8320 const char *name;
8321 boolean strip;
8322
8323 /* It's OK to base decisions on the section name, because none
8324 of the dynobj section names depend upon the input files. */
8325 name = bfd_get_section_name (dynobj, s);
8326
8327 if ((s->flags & SEC_LINKER_CREATED) == 0)
8328 continue;
8329
8330 strip = false;
8331
8332 if (strncmp (name, ".rel", 4) == 0)
8333 {
8334 if (s->_raw_size == 0)
8335 {
8336 /* We only strip the section if the output section name
8337 has the same name. Otherwise, there might be several
8338 input sections for this output section. FIXME: This
8339 code is probably not needed these days anyhow, since
8340 the linker now does not create empty output sections. */
8341 if (s->output_section != NULL
8342 && strcmp (name,
8343 bfd_get_section_name (s->output_section->owner,
8344 s->output_section)) == 0)
8345 strip = true;
8346 }
8347 else
8348 {
8349 const char *outname;
8350 asection *target;
8351
8352 /* If this relocation section applies to a read only
8353 section, then we probably need a DT_TEXTREL entry.
8354 If the relocation section is .rel.dyn, we always
8355 assert a DT_TEXTREL entry rather than testing whether
8356 there exists a relocation to a read only section or
8357 not. */
8358 outname = bfd_get_section_name (output_bfd,
8359 s->output_section);
8360 target = bfd_get_section_by_name (output_bfd, outname + 4);
8361 if ((target != NULL
8362 && (target->flags & SEC_READONLY) != 0
8363 && (target->flags & SEC_ALLOC) != 0)
8364 || strcmp (outname,
8365 MIPS_ELF_REL_DYN_SECTION_NAME (output_bfd)) == 0)
8366 reltext = true;
8367
8368 /* We use the reloc_count field as a counter if we need
8369 to copy relocs into the output file. */
8370 if (strcmp (name,
8371 MIPS_ELF_REL_DYN_SECTION_NAME (output_bfd)) != 0)
8372 s->reloc_count = 0;
8373 }
8374 }
8375 else if (strncmp (name, ".got", 4) == 0)
8376 {
8377 int i;
8378 bfd_size_type loadable_size = 0;
8379 bfd_size_type local_gotno;
8380 bfd *sub;
8381
8382 BFD_ASSERT (elf_section_data (s) != NULL);
8383 g = (struct mips_got_info *) elf_section_data (s)->tdata;
8384 BFD_ASSERT (g != NULL);
8385
8386 /* Calculate the total loadable size of the output. That
8387 will give us the maximum number of GOT_PAGE entries
8388 required. */
8389 for (sub = info->input_bfds; sub; sub = sub->link_next)
8390 {
8391 asection *subsection;
8392
8393 for (subsection = sub->sections;
8394 subsection;
8395 subsection = subsection->next)
8396 {
8397 if ((subsection->flags & SEC_ALLOC) == 0)
8398 continue;
8399 loadable_size += ((subsection->_raw_size + 0xf)
8400 &~ (bfd_size_type) 0xf);
8401 }
8402 }
8403 loadable_size += MIPS_FUNCTION_STUB_SIZE;
8404
8405 /* Assume there are two loadable segments consisting of
8406 contiguous sections. Is 5 enough? */
8407 local_gotno = (loadable_size >> 16) + 5;
8408 if (IRIX_COMPAT (output_bfd) == ict_irix6)
8409 /* It's possible we will need GOT_PAGE entries as well as
8410 GOT16 entries. Often, these will be able to share GOT
8411 entries, but not always. */
8412 local_gotno *= 2;
8413
8414 g->local_gotno += local_gotno;
8415 s->_raw_size += local_gotno * MIPS_ELF_GOT_SIZE (dynobj);
8416
8417 /* There has to be a global GOT entry for every symbol with
8418 a dynamic symbol table index of DT_MIPS_GOTSYM or
8419 higher. Therefore, it make sense to put those symbols
8420 that need GOT entries at the end of the symbol table. We
8421 do that here. */
8422 if (!mips_elf_sort_hash_table (info, 1))
8423 return false;
8424
8425 if (g->global_gotsym != NULL)
8426 i = elf_hash_table (info)->dynsymcount - g->global_gotsym->dynindx;
8427 else
8428 /* If there are no global symbols, or none requiring
8429 relocations, then GLOBAL_GOTSYM will be NULL. */
8430 i = 0;
8431 g->global_gotno = i;
8432 s->_raw_size += i * MIPS_ELF_GOT_SIZE (dynobj);
8433 }
8434 else if (strcmp (name, MIPS_ELF_STUB_SECTION_NAME (output_bfd)) == 0)
8435 {
8436 /* Irix rld assumes that the function stub isn't at the end
8437 of .text section. So put a dummy. XXX */
8438 s->_raw_size += MIPS_FUNCTION_STUB_SIZE;
8439 }
8440 else if (! info->shared
8441 && ! mips_elf_hash_table (info)->use_rld_obj_head
8442 && strncmp (name, ".rld_map", 8) == 0)
8443 {
8444 /* We add a room for __rld_map. It will be filled in by the
8445 rtld to contain a pointer to the _r_debug structure. */
8446 s->_raw_size += 4;
8447 }
8448 else if (SGI_COMPAT (output_bfd)
8449 && strncmp (name, ".compact_rel", 12) == 0)
8450 s->_raw_size += mips_elf_hash_table (info)->compact_rel_size;
8451 else if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (output_bfd))
8452 == 0)
8453 s->_raw_size = (sizeof (Elf32_External_Msym)
8454 * (elf_hash_table (info)->dynsymcount
8455 + bfd_count_sections (output_bfd)));
8456 else if (strncmp (name, ".init", 5) != 0)
8457 {
8458 /* It's not one of our sections, so don't allocate space. */
8459 continue;
8460 }
8461
8462 if (strip)
8463 {
8464 _bfd_strip_section_from_output (info, s);
8465 continue;
8466 }
8467
8468 /* Allocate memory for the section contents. */
8469 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
8470 if (s->contents == NULL && s->_raw_size != 0)
8471 {
8472 bfd_set_error (bfd_error_no_memory);
8473 return false;
8474 }
8475 }
8476
8477 if (elf_hash_table (info)->dynamic_sections_created)
8478 {
8479 /* Add some entries to the .dynamic section. We fill in the
8480 values later, in elf_mips_finish_dynamic_sections, but we
8481 must add the entries now so that we get the correct size for
8482 the .dynamic section. The DT_DEBUG entry is filled in by the
8483 dynamic linker and used by the debugger. */
8484 if (! info->shared)
8485 {
8486 /* SGI object has the equivalence of DT_DEBUG in the
8487 DT_MIPS_RLD_MAP entry. */
8488 if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_MAP, 0))
8489 return false;
8490 if (!SGI_COMPAT (output_bfd))
8491 {
8492 if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0))
8493 return false;
8494 }
8495 }
8496 else
8497 {
8498 /* Shared libraries on traditional mips have DT_DEBUG. */
8499 if (!SGI_COMPAT (output_bfd))
8500 {
8501 if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0))
8502 return false;
8503 }
8504 }
8505
8506 if (reltext && SGI_COMPAT (output_bfd))
8507 info->flags |= DF_TEXTREL;
8508
8509 if ((info->flags & DF_TEXTREL) != 0)
8510 {
8511 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_TEXTREL, 0))
8512 return false;
8513 }
8514
8515 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTGOT, 0))
8516 return false;
8517
8518 if (bfd_get_section_by_name (dynobj,
8519 MIPS_ELF_REL_DYN_SECTION_NAME (dynobj)))
8520 {
8521 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_REL, 0))
8522 return false;
8523
8524 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELSZ, 0))
8525 return false;
8526
8527 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELENT, 0))
8528 return false;
8529 }
8530
8531 if (SGI_COMPAT (output_bfd))
8532 {
8533 if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_CONFLICTNO, 0))
8534 return false;
8535 }
8536
8537 if (SGI_COMPAT (output_bfd))
8538 {
8539 if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LIBLISTNO, 0))
8540 return false;
8541 }
8542
8543 if (bfd_get_section_by_name (dynobj, ".conflict") != NULL)
8544 {
8545 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_CONFLICT, 0))
8546 return false;
8547
8548 s = bfd_get_section_by_name (dynobj, ".liblist");
8549 BFD_ASSERT (s != NULL);
8550
8551 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LIBLIST, 0))
8552 return false;
8553 }
8554
8555 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_VERSION, 0))
8556 return false;
8557
8558 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_FLAGS, 0))
8559 return false;
8560
8561 #if 0
8562 /* Time stamps in executable files are a bad idea. */
8563 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_TIME_STAMP, 0))
8564 return false;
8565 #endif
8566
8567 #if 0 /* FIXME */
8568 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_ICHECKSUM, 0))
8569 return false;
8570 #endif
8571
8572 #if 0 /* FIXME */
8573 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_IVERSION, 0))
8574 return false;
8575 #endif
8576
8577 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_BASE_ADDRESS, 0))
8578 return false;
8579
8580 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LOCAL_GOTNO, 0))
8581 return false;
8582
8583 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_SYMTABNO, 0))
8584 return false;
8585
8586 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_UNREFEXTNO, 0))
8587 return false;
8588
8589 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_GOTSYM, 0))
8590 return false;
8591
8592 if (IRIX_COMPAT (dynobj) == ict_irix5
8593 && ! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_HIPAGENO, 0))
8594 return false;
8595
8596 if (IRIX_COMPAT (dynobj) == ict_irix6
8597 && (bfd_get_section_by_name
8598 (dynobj, MIPS_ELF_OPTIONS_SECTION_NAME (dynobj)))
8599 && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_OPTIONS, 0))
8600 return false;
8601
8602 if (bfd_get_section_by_name (dynobj,
8603 MIPS_ELF_MSYM_SECTION_NAME (dynobj))
8604 && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_MSYM, 0))
8605 return false;
8606 }
8607
8608 return true;
8609 }
8610
8611 /* If NAME is one of the special IRIX6 symbols defined by the linker,
8612 adjust it appropriately now. */
8613
8614 static void
8615 mips_elf_irix6_finish_dynamic_symbol (abfd, name, sym)
8616 bfd *abfd ATTRIBUTE_UNUSED;
8617 const char *name;
8618 Elf_Internal_Sym *sym;
8619 {
8620 /* The linker script takes care of providing names and values for
8621 these, but we must place them into the right sections. */
8622 static const char* const text_section_symbols[] = {
8623 "_ftext",
8624 "_etext",
8625 "__dso_displacement",
8626 "__elf_header",
8627 "__program_header_table",
8628 NULL
8629 };
8630
8631 static const char* const data_section_symbols[] = {
8632 "_fdata",
8633 "_edata",
8634 "_end",
8635 "_fbss",
8636 NULL
8637 };
8638
8639 const char* const *p;
8640 int i;
8641
8642 for (i = 0; i < 2; ++i)
8643 for (p = (i == 0) ? text_section_symbols : data_section_symbols;
8644 *p;
8645 ++p)
8646 if (strcmp (*p, name) == 0)
8647 {
8648 /* All of these symbols are given type STT_SECTION by the
8649 IRIX6 linker. */
8650 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8651
8652 /* The IRIX linker puts these symbols in special sections. */
8653 if (i == 0)
8654 sym->st_shndx = SHN_MIPS_TEXT;
8655 else
8656 sym->st_shndx = SHN_MIPS_DATA;
8657
8658 break;
8659 }
8660 }
8661
8662 /* Finish up dynamic symbol handling. We set the contents of various
8663 dynamic sections here. */
8664
8665 boolean
8666 _bfd_mips_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
8667 bfd *output_bfd;
8668 struct bfd_link_info *info;
8669 struct elf_link_hash_entry *h;
8670 Elf_Internal_Sym *sym;
8671 {
8672 bfd *dynobj;
8673 bfd_vma gval;
8674 asection *sgot;
8675 asection *smsym;
8676 struct mips_got_info *g;
8677 const char *name;
8678 struct mips_elf_link_hash_entry *mh;
8679
8680 dynobj = elf_hash_table (info)->dynobj;
8681 gval = sym->st_value;
8682 mh = (struct mips_elf_link_hash_entry *) h;
8683
8684 if (h->plt.offset != (bfd_vma) -1)
8685 {
8686 asection *s;
8687 bfd_byte *p;
8688 bfd_byte stub[MIPS_FUNCTION_STUB_SIZE];
8689
8690 /* This symbol has a stub. Set it up. */
8691
8692 BFD_ASSERT (h->dynindx != -1);
8693
8694 s = bfd_get_section_by_name (dynobj,
8695 MIPS_ELF_STUB_SECTION_NAME (dynobj));
8696 BFD_ASSERT (s != NULL);
8697
8698 /* Fill the stub. */
8699 p = stub;
8700 bfd_put_32 (output_bfd, (bfd_vma) STUB_LW (output_bfd), p);
8701 p += 4;
8702 bfd_put_32 (output_bfd, (bfd_vma) STUB_MOVE (output_bfd), p);
8703 p += 4;
8704
8705 /* FIXME: Can h->dynindex be more than 64K? */
8706 if (h->dynindx & 0xffff0000)
8707 return false;
8708
8709 bfd_put_32 (output_bfd, (bfd_vma) STUB_JALR, p);
8710 p += 4;
8711 bfd_put_32 (output_bfd, (bfd_vma) STUB_LI16 (output_bfd) + h->dynindx, p);
8712
8713 BFD_ASSERT (h->plt.offset <= s->_raw_size);
8714 memcpy (s->contents + h->plt.offset, stub, MIPS_FUNCTION_STUB_SIZE);
8715
8716 /* Mark the symbol as undefined. plt.offset != -1 occurs
8717 only for the referenced symbol. */
8718 sym->st_shndx = SHN_UNDEF;
8719
8720 /* The run-time linker uses the st_value field of the symbol
8721 to reset the global offset table entry for this external
8722 to its stub address when unlinking a shared object. */
8723 gval = s->output_section->vma + s->output_offset + h->plt.offset;
8724 sym->st_value = gval;
8725 }
8726
8727 BFD_ASSERT (h->dynindx != -1
8728 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0);
8729
8730 sgot = mips_elf_got_section (dynobj);
8731 BFD_ASSERT (sgot != NULL);
8732 BFD_ASSERT (elf_section_data (sgot) != NULL);
8733 g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
8734 BFD_ASSERT (g != NULL);
8735
8736 /* Run through the global symbol table, creating GOT entries for all
8737 the symbols that need them. */
8738 if (g->global_gotsym != NULL
8739 && h->dynindx >= g->global_gotsym->dynindx)
8740 {
8741 bfd_vma offset;
8742 bfd_vma value;
8743
8744 if (sym->st_value)
8745 value = sym->st_value;
8746 else
8747 {
8748 /* For an entity defined in a shared object, this will be
8749 NULL. (For functions in shared objects for
8750 which we have created stubs, ST_VALUE will be non-NULL.
8751 That's because such the functions are now no longer defined
8752 in a shared object.) */
8753
8754 if (info->shared && h->root.type == bfd_link_hash_undefined)
8755 value = 0;
8756 else
8757 value = h->root.u.def.value;
8758 }
8759 offset = mips_elf_global_got_index (dynobj, h);
8760 MIPS_ELF_PUT_WORD (output_bfd, value, sgot->contents + offset);
8761 }
8762
8763 /* Create a .msym entry, if appropriate. */
8764 smsym = bfd_get_section_by_name (dynobj,
8765 MIPS_ELF_MSYM_SECTION_NAME (dynobj));
8766 if (smsym)
8767 {
8768 Elf32_Internal_Msym msym;
8769
8770 msym.ms_hash_value = bfd_elf_hash (h->root.root.string);
8771 /* It is undocumented what the `1' indicates, but IRIX6 uses
8772 this value. */
8773 msym.ms_info = ELF32_MS_INFO (mh->min_dyn_reloc_index, 1);
8774 bfd_mips_elf_swap_msym_out
8775 (dynobj, &msym,
8776 ((Elf32_External_Msym *) smsym->contents) + h->dynindx);
8777 }
8778
8779 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
8780 name = h->root.root.string;
8781 if (strcmp (name, "_DYNAMIC") == 0
8782 || strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0)
8783 sym->st_shndx = SHN_ABS;
8784 else if (strcmp (name, "_DYNAMIC_LINK") == 0
8785 || strcmp (name, "_DYNAMIC_LINKING") == 0)
8786 {
8787 sym->st_shndx = SHN_ABS;
8788 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8789 sym->st_value = 1;
8790 }
8791 else if (strcmp (name, "_gp_disp") == 0)
8792 {
8793 sym->st_shndx = SHN_ABS;
8794 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8795 sym->st_value = elf_gp (output_bfd);
8796 }
8797 else if (SGI_COMPAT (output_bfd))
8798 {
8799 if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0
8800 || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0)
8801 {
8802 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8803 sym->st_other = STO_PROTECTED;
8804 sym->st_value = 0;
8805 sym->st_shndx = SHN_MIPS_DATA;
8806 }
8807 else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0)
8808 {
8809 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8810 sym->st_other = STO_PROTECTED;
8811 sym->st_value = mips_elf_hash_table (info)->procedure_count;
8812 sym->st_shndx = SHN_ABS;
8813 }
8814 else if (sym->st_shndx != SHN_UNDEF && sym->st_shndx != SHN_ABS)
8815 {
8816 if (h->type == STT_FUNC)
8817 sym->st_shndx = SHN_MIPS_TEXT;
8818 else if (h->type == STT_OBJECT)
8819 sym->st_shndx = SHN_MIPS_DATA;
8820 }
8821 }
8822
8823 /* Handle the IRIX6-specific symbols. */
8824 if (IRIX_COMPAT (output_bfd) == ict_irix6)
8825 mips_elf_irix6_finish_dynamic_symbol (output_bfd, name, sym);
8826
8827 if (! info->shared)
8828 {
8829 if (! mips_elf_hash_table (info)->use_rld_obj_head
8830 && (strcmp (name, "__rld_map") == 0
8831 || strcmp (name, "__RLD_MAP") == 0))
8832 {
8833 asection *s = bfd_get_section_by_name (dynobj, ".rld_map");
8834 BFD_ASSERT (s != NULL);
8835 sym->st_value = s->output_section->vma + s->output_offset;
8836 bfd_put_32 (output_bfd, (bfd_vma) 0, s->contents);
8837 if (mips_elf_hash_table (info)->rld_value == 0)
8838 mips_elf_hash_table (info)->rld_value = sym->st_value;
8839 }
8840 else if (mips_elf_hash_table (info)->use_rld_obj_head
8841 && strcmp (name, "__rld_obj_head") == 0)
8842 {
8843 /* IRIX6 does not use a .rld_map section. */
8844 if (IRIX_COMPAT (output_bfd) == ict_irix5
8845 || IRIX_COMPAT (output_bfd) == ict_none)
8846 BFD_ASSERT (bfd_get_section_by_name (dynobj, ".rld_map")
8847 != NULL);
8848 mips_elf_hash_table (info)->rld_value = sym->st_value;
8849 }
8850 }
8851
8852 /* If this is a mips16 symbol, force the value to be even. */
8853 if (sym->st_other == STO_MIPS16
8854 && (sym->st_value & 1) != 0)
8855 --sym->st_value;
8856
8857 return true;
8858 }
8859
8860 /* Finish up the dynamic sections. */
8861
8862 boolean
8863 _bfd_mips_elf_finish_dynamic_sections (output_bfd, info)
8864 bfd *output_bfd;
8865 struct bfd_link_info *info;
8866 {
8867 bfd *dynobj;
8868 asection *sdyn;
8869 asection *sgot;
8870 struct mips_got_info *g;
8871
8872 dynobj = elf_hash_table (info)->dynobj;
8873
8874 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8875
8876 sgot = mips_elf_got_section (dynobj);
8877 if (sgot == NULL)
8878 g = NULL;
8879 else
8880 {
8881 BFD_ASSERT (elf_section_data (sgot) != NULL);
8882 g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
8883 BFD_ASSERT (g != NULL);
8884 }
8885
8886 if (elf_hash_table (info)->dynamic_sections_created)
8887 {
8888 bfd_byte *b;
8889
8890 BFD_ASSERT (sdyn != NULL);
8891 BFD_ASSERT (g != NULL);
8892
8893 for (b = sdyn->contents;
8894 b < sdyn->contents + sdyn->_raw_size;
8895 b += MIPS_ELF_DYN_SIZE (dynobj))
8896 {
8897 Elf_Internal_Dyn dyn;
8898 const char *name;
8899 size_t elemsize;
8900 asection *s;
8901 boolean swap_out_p;
8902
8903 /* Read in the current dynamic entry. */
8904 (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn);
8905
8906 /* Assume that we're going to modify it and write it out. */
8907 swap_out_p = true;
8908
8909 switch (dyn.d_tag)
8910 {
8911 case DT_RELENT:
8912 s = (bfd_get_section_by_name
8913 (dynobj,
8914 MIPS_ELF_REL_DYN_SECTION_NAME (dynobj)));
8915 BFD_ASSERT (s != NULL);
8916 dyn.d_un.d_val = MIPS_ELF_REL_SIZE (dynobj);
8917 break;
8918
8919 case DT_STRSZ:
8920 /* Rewrite DT_STRSZ. */
8921 dyn.d_un.d_val =
8922 _bfd_stringtab_size (elf_hash_table (info)->dynstr);
8923 break;
8924
8925 case DT_PLTGOT:
8926 name = ".got";
8927 goto get_vma;
8928 case DT_MIPS_CONFLICT:
8929 name = ".conflict";
8930 goto get_vma;
8931 case DT_MIPS_LIBLIST:
8932 name = ".liblist";
8933 get_vma:
8934 s = bfd_get_section_by_name (output_bfd, name);
8935 BFD_ASSERT (s != NULL);
8936 dyn.d_un.d_ptr = s->vma;
8937 break;
8938
8939 case DT_MIPS_RLD_VERSION:
8940 dyn.d_un.d_val = 1; /* XXX */
8941 break;
8942
8943 case DT_MIPS_FLAGS:
8944 dyn.d_un.d_val = RHF_NOTPOT; /* XXX */
8945 break;
8946
8947 case DT_MIPS_CONFLICTNO:
8948 name = ".conflict";
8949 elemsize = sizeof (Elf32_Conflict);
8950 goto set_elemno;
8951
8952 case DT_MIPS_LIBLISTNO:
8953 name = ".liblist";
8954 elemsize = sizeof (Elf32_Lib);
8955 set_elemno:
8956 s = bfd_get_section_by_name (output_bfd, name);
8957 if (s != NULL)
8958 {
8959 if (s->_cooked_size != 0)
8960 dyn.d_un.d_val = s->_cooked_size / elemsize;
8961 else
8962 dyn.d_un.d_val = s->_raw_size / elemsize;
8963 }
8964 else
8965 dyn.d_un.d_val = 0;
8966 break;
8967
8968 case DT_MIPS_TIME_STAMP:
8969 time ((time_t *) &dyn.d_un.d_val);
8970 break;
8971
8972 case DT_MIPS_ICHECKSUM:
8973 /* XXX FIXME: */
8974 swap_out_p = false;
8975 break;
8976
8977 case DT_MIPS_IVERSION:
8978 /* XXX FIXME: */
8979 swap_out_p = false;
8980 break;
8981
8982 case DT_MIPS_BASE_ADDRESS:
8983 s = output_bfd->sections;
8984 BFD_ASSERT (s != NULL);
8985 dyn.d_un.d_ptr = s->vma & ~(bfd_vma) 0xffff;
8986 break;
8987
8988 case DT_MIPS_LOCAL_GOTNO:
8989 dyn.d_un.d_val = g->local_gotno;
8990 break;
8991
8992 case DT_MIPS_UNREFEXTNO:
8993 /* The index into the dynamic symbol table which is the
8994 entry of the first external symbol that is not
8995 referenced within the same object. */
8996 dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1;
8997 break;
8998
8999 case DT_MIPS_GOTSYM:
9000 if (g->global_gotsym)
9001 {
9002 dyn.d_un.d_val = g->global_gotsym->dynindx;
9003 break;
9004 }
9005 /* In case if we don't have global got symbols we default
9006 to setting DT_MIPS_GOTSYM to the same value as
9007 DT_MIPS_SYMTABNO, so we just fall through. */
9008
9009 case DT_MIPS_SYMTABNO:
9010 name = ".dynsym";
9011 elemsize = MIPS_ELF_SYM_SIZE (output_bfd);
9012 s = bfd_get_section_by_name (output_bfd, name);
9013 BFD_ASSERT (s != NULL);
9014
9015 if (s->_cooked_size != 0)
9016 dyn.d_un.d_val = s->_cooked_size / elemsize;
9017 else
9018 dyn.d_un.d_val = s->_raw_size / elemsize;
9019 break;
9020
9021 case DT_MIPS_HIPAGENO:
9022 dyn.d_un.d_val = g->local_gotno - MIPS_RESERVED_GOTNO;
9023 break;
9024
9025 case DT_MIPS_RLD_MAP:
9026 dyn.d_un.d_ptr = mips_elf_hash_table (info)->rld_value;
9027 break;
9028
9029 case DT_MIPS_OPTIONS:
9030 s = (bfd_get_section_by_name
9031 (output_bfd, MIPS_ELF_OPTIONS_SECTION_NAME (output_bfd)));
9032 dyn.d_un.d_ptr = s->vma;
9033 break;
9034
9035 case DT_MIPS_MSYM:
9036 s = (bfd_get_section_by_name
9037 (output_bfd, MIPS_ELF_MSYM_SECTION_NAME (output_bfd)));
9038 dyn.d_un.d_ptr = s->vma;
9039 break;
9040
9041 default:
9042 swap_out_p = false;
9043 break;
9044 }
9045
9046 if (swap_out_p)
9047 (*get_elf_backend_data (dynobj)->s->swap_dyn_out)
9048 (dynobj, &dyn, b);
9049 }
9050 }
9051
9052 /* The first entry of the global offset table will be filled at
9053 runtime. The second entry will be used by some runtime loaders.
9054 This isn't the case of Irix rld. */
9055 if (sgot != NULL && sgot->_raw_size > 0)
9056 {
9057 MIPS_ELF_PUT_WORD (output_bfd, (bfd_vma) 0, sgot->contents);
9058 MIPS_ELF_PUT_WORD (output_bfd, (bfd_vma) 0x80000000,
9059 sgot->contents + MIPS_ELF_GOT_SIZE (output_bfd));
9060 }
9061
9062 if (sgot != NULL)
9063 elf_section_data (sgot->output_section)->this_hdr.sh_entsize
9064 = MIPS_ELF_GOT_SIZE (output_bfd);
9065
9066 {
9067 asection *smsym;
9068 asection *s;
9069 Elf32_compact_rel cpt;
9070
9071 /* ??? The section symbols for the output sections were set up in
9072 _bfd_elf_final_link. SGI sets the STT_NOTYPE attribute for these
9073 symbols. Should we do so? */
9074
9075 smsym = bfd_get_section_by_name (dynobj,
9076 MIPS_ELF_MSYM_SECTION_NAME (dynobj));
9077 if (smsym != NULL)
9078 {
9079 Elf32_Internal_Msym msym;
9080
9081 msym.ms_hash_value = 0;
9082 msym.ms_info = ELF32_MS_INFO (0, 1);
9083
9084 for (s = output_bfd->sections; s != NULL; s = s->next)
9085 {
9086 long dynindx = elf_section_data (s)->dynindx;
9087
9088 bfd_mips_elf_swap_msym_out
9089 (output_bfd, &msym,
9090 (((Elf32_External_Msym *) smsym->contents)
9091 + dynindx));
9092 }
9093 }
9094
9095 if (SGI_COMPAT (output_bfd))
9096 {
9097 /* Write .compact_rel section out. */
9098 s = bfd_get_section_by_name (dynobj, ".compact_rel");
9099 if (s != NULL)
9100 {
9101 cpt.id1 = 1;
9102 cpt.num = s->reloc_count;
9103 cpt.id2 = 2;
9104 cpt.offset = (s->output_section->filepos
9105 + sizeof (Elf32_External_compact_rel));
9106 cpt.reserved0 = 0;
9107 cpt.reserved1 = 0;
9108 bfd_elf32_swap_compact_rel_out (output_bfd, &cpt,
9109 ((Elf32_External_compact_rel *)
9110 s->contents));
9111
9112 /* Clean up a dummy stub function entry in .text. */
9113 s = bfd_get_section_by_name (dynobj,
9114 MIPS_ELF_STUB_SECTION_NAME (dynobj));
9115 if (s != NULL)
9116 {
9117 file_ptr dummy_offset;
9118
9119 BFD_ASSERT (s->_raw_size >= MIPS_FUNCTION_STUB_SIZE);
9120 dummy_offset = s->_raw_size - MIPS_FUNCTION_STUB_SIZE;
9121 memset (s->contents + dummy_offset, 0,
9122 MIPS_FUNCTION_STUB_SIZE);
9123 }
9124 }
9125 }
9126
9127 /* We need to sort the entries of the dynamic relocation section. */
9128
9129 if (!ABI_64_P (output_bfd))
9130 {
9131 asection *reldyn;
9132
9133 reldyn = bfd_get_section_by_name (dynobj,
9134 MIPS_ELF_REL_DYN_SECTION_NAME (dynobj));
9135 if (reldyn != NULL && reldyn->reloc_count > 2)
9136 {
9137 reldyn_sorting_bfd = output_bfd;
9138 qsort ((Elf32_External_Rel *) reldyn->contents + 1,
9139 (size_t) reldyn->reloc_count - 1,
9140 sizeof (Elf32_External_Rel), sort_dynamic_relocs);
9141 }
9142 }
9143
9144 /* Clean up a first relocation in .rel.dyn. */
9145 s = bfd_get_section_by_name (dynobj,
9146 MIPS_ELF_REL_DYN_SECTION_NAME (dynobj));
9147 if (s != NULL && s->_raw_size > 0)
9148 memset (s->contents, 0, MIPS_ELF_REL_SIZE (dynobj));
9149 }
9150
9151 return true;
9152 }
9153 \f
9154 /* Support for core dump NOTE sections */
9155 static boolean
9156 _bfd_elf32_mips_grok_prstatus (abfd, note)
9157 bfd *abfd;
9158 Elf_Internal_Note *note;
9159 {
9160 int offset;
9161 unsigned int raw_size;
9162
9163 switch (note->descsz)
9164 {
9165 default:
9166 return false;
9167
9168 case 256: /* Linux/MIPS */
9169 /* pr_cursig */
9170 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
9171
9172 /* pr_pid */
9173 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
9174
9175 /* pr_reg */
9176 offset = 72;
9177 raw_size = 180;
9178
9179 break;
9180 }
9181
9182 /* Make a ".reg/999" section. */
9183 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
9184 raw_size, note->descpos + offset);
9185 }
9186
9187 static boolean
9188 _bfd_elf32_mips_grok_psinfo (abfd, note)
9189 bfd *abfd;
9190 Elf_Internal_Note *note;
9191 {
9192 switch (note->descsz)
9193 {
9194 default:
9195 return false;
9196
9197 case 128: /* Linux/MIPS elf_prpsinfo */
9198 elf_tdata (abfd)->core_program
9199 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
9200 elf_tdata (abfd)->core_command
9201 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
9202 }
9203
9204 /* Note that for some reason, a spurious space is tacked
9205 onto the end of the args in some (at least one anyway)
9206 implementations, so strip it off if it exists. */
9207
9208 {
9209 char *command = elf_tdata (abfd)->core_command;
9210 int n = strlen (command);
9211
9212 if (0 < n && command[n - 1] == ' ')
9213 command[n - 1] = '\0';
9214 }
9215
9216 return true;
9217 }
9218 \f
9219 /* This is almost identical to bfd_generic_get_... except that some
9220 MIPS relocations need to be handled specially. Sigh. */
9221
9222 static bfd_byte *
9223 elf32_mips_get_relocated_section_contents (abfd, link_info, link_order, data,
9224 relocateable, symbols)
9225 bfd *abfd;
9226 struct bfd_link_info *link_info;
9227 struct bfd_link_order *link_order;
9228 bfd_byte *data;
9229 boolean relocateable;
9230 asymbol **symbols;
9231 {
9232 /* Get enough memory to hold the stuff */
9233 bfd *input_bfd = link_order->u.indirect.section->owner;
9234 asection *input_section = link_order->u.indirect.section;
9235
9236 long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section);
9237 arelent **reloc_vector = NULL;
9238 long reloc_count;
9239
9240 if (reloc_size < 0)
9241 goto error_return;
9242
9243 reloc_vector = (arelent **) bfd_malloc ((bfd_size_type) reloc_size);
9244 if (reloc_vector == NULL && reloc_size != 0)
9245 goto error_return;
9246
9247 /* read in the section */
9248 if (!bfd_get_section_contents (input_bfd,
9249 input_section,
9250 (PTR) data,
9251 (file_ptr) 0,
9252 input_section->_raw_size))
9253 goto error_return;
9254
9255 /* We're not relaxing the section, so just copy the size info */
9256 input_section->_cooked_size = input_section->_raw_size;
9257 input_section->reloc_done = true;
9258
9259 reloc_count = bfd_canonicalize_reloc (input_bfd,
9260 input_section,
9261 reloc_vector,
9262 symbols);
9263 if (reloc_count < 0)
9264 goto error_return;
9265
9266 if (reloc_count > 0)
9267 {
9268 arelent **parent;
9269 /* for mips */
9270 int gp_found;
9271 bfd_vma gp = 0x12345678; /* initialize just to shut gcc up */
9272
9273 {
9274 struct bfd_hash_entry *h;
9275 struct bfd_link_hash_entry *lh;
9276 /* Skip all this stuff if we aren't mixing formats. */
9277 if (abfd && input_bfd
9278 && abfd->xvec == input_bfd->xvec)
9279 lh = 0;
9280 else
9281 {
9282 h = bfd_hash_lookup (&link_info->hash->table, "_gp", false, false);
9283 lh = (struct bfd_link_hash_entry *) h;
9284 }
9285 lookup:
9286 if (lh)
9287 {
9288 switch (lh->type)
9289 {
9290 case bfd_link_hash_undefined:
9291 case bfd_link_hash_undefweak:
9292 case bfd_link_hash_common:
9293 gp_found = 0;
9294 break;
9295 case bfd_link_hash_defined:
9296 case bfd_link_hash_defweak:
9297 gp_found = 1;
9298 gp = lh->u.def.value;
9299 break;
9300 case bfd_link_hash_indirect:
9301 case bfd_link_hash_warning:
9302 lh = lh->u.i.link;
9303 /* @@FIXME ignoring warning for now */
9304 goto lookup;
9305 case bfd_link_hash_new:
9306 default:
9307 abort ();
9308 }
9309 }
9310 else
9311 gp_found = 0;
9312 }
9313 /* end mips */
9314 for (parent = reloc_vector; *parent != (arelent *) NULL;
9315 parent++)
9316 {
9317 char *error_message = (char *) NULL;
9318 bfd_reloc_status_type r;
9319
9320 /* Specific to MIPS: Deal with relocation types that require
9321 knowing the gp of the output bfd. */
9322 asymbol *sym = *(*parent)->sym_ptr_ptr;
9323 if (bfd_is_abs_section (sym->section) && abfd)
9324 {
9325 /* The special_function wouldn't get called anyways. */
9326 }
9327 else if (!gp_found)
9328 {
9329 /* The gp isn't there; let the special function code
9330 fall over on its own. */
9331 }
9332 else if ((*parent)->howto->special_function
9333 == _bfd_mips_elf_gprel16_reloc)
9334 {
9335 /* bypass special_function call */
9336 r = gprel16_with_gp (input_bfd, sym, *parent, input_section,
9337 relocateable, (PTR) data, gp);
9338 goto skip_bfd_perform_relocation;
9339 }
9340 /* end mips specific stuff */
9341
9342 r = bfd_perform_relocation (input_bfd,
9343 *parent,
9344 (PTR) data,
9345 input_section,
9346 relocateable ? abfd : (bfd *) NULL,
9347 &error_message);
9348 skip_bfd_perform_relocation:
9349
9350 if (relocateable)
9351 {
9352 asection *os = input_section->output_section;
9353
9354 /* A partial link, so keep the relocs */
9355 os->orelocation[os->reloc_count] = *parent;
9356 os->reloc_count++;
9357 }
9358
9359 if (r != bfd_reloc_ok)
9360 {
9361 switch (r)
9362 {
9363 case bfd_reloc_undefined:
9364 if (!((*link_info->callbacks->undefined_symbol)
9365 (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
9366 input_bfd, input_section, (*parent)->address,
9367 true)))
9368 goto error_return;
9369 break;
9370 case bfd_reloc_dangerous:
9371 BFD_ASSERT (error_message != (char *) NULL);
9372 if (!((*link_info->callbacks->reloc_dangerous)
9373 (link_info, error_message, input_bfd, input_section,
9374 (*parent)->address)))
9375 goto error_return;
9376 break;
9377 case bfd_reloc_overflow:
9378 if (!((*link_info->callbacks->reloc_overflow)
9379 (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
9380 (*parent)->howto->name, (*parent)->addend,
9381 input_bfd, input_section, (*parent)->address)))
9382 goto error_return;
9383 break;
9384 case bfd_reloc_outofrange:
9385 default:
9386 abort ();
9387 break;
9388 }
9389
9390 }
9391 }
9392 }
9393 if (reloc_vector != NULL)
9394 free (reloc_vector);
9395 return data;
9396
9397 error_return:
9398 if (reloc_vector != NULL)
9399 free (reloc_vector);
9400 return NULL;
9401 }
9402
9403 #define bfd_elf32_bfd_get_relocated_section_contents \
9404 elf32_mips_get_relocated_section_contents
9405 \f
9406 /* ECOFF swapping routines. These are used when dealing with the
9407 .mdebug section, which is in the ECOFF debugging format. */
9408 static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
9409 /* Symbol table magic number. */
9410 magicSym,
9411 /* Alignment of debugging information. E.g., 4. */
9412 4,
9413 /* Sizes of external symbolic information. */
9414 sizeof (struct hdr_ext),
9415 sizeof (struct dnr_ext),
9416 sizeof (struct pdr_ext),
9417 sizeof (struct sym_ext),
9418 sizeof (struct opt_ext),
9419 sizeof (struct fdr_ext),
9420 sizeof (struct rfd_ext),
9421 sizeof (struct ext_ext),
9422 /* Functions to swap in external symbolic data. */
9423 ecoff_swap_hdr_in,
9424 ecoff_swap_dnr_in,
9425 ecoff_swap_pdr_in,
9426 ecoff_swap_sym_in,
9427 ecoff_swap_opt_in,
9428 ecoff_swap_fdr_in,
9429 ecoff_swap_rfd_in,
9430 ecoff_swap_ext_in,
9431 _bfd_ecoff_swap_tir_in,
9432 _bfd_ecoff_swap_rndx_in,
9433 /* Functions to swap out external symbolic data. */
9434 ecoff_swap_hdr_out,
9435 ecoff_swap_dnr_out,
9436 ecoff_swap_pdr_out,
9437 ecoff_swap_sym_out,
9438 ecoff_swap_opt_out,
9439 ecoff_swap_fdr_out,
9440 ecoff_swap_rfd_out,
9441 ecoff_swap_ext_out,
9442 _bfd_ecoff_swap_tir_out,
9443 _bfd_ecoff_swap_rndx_out,
9444 /* Function to read in symbolic data. */
9445 _bfd_mips_elf_read_ecoff_info
9446 };
9447 \f
9448 #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec
9449 #define TARGET_LITTLE_NAME "elf32-littlemips"
9450 #define TARGET_BIG_SYM bfd_elf32_bigmips_vec
9451 #define TARGET_BIG_NAME "elf32-bigmips"
9452 #define ELF_ARCH bfd_arch_mips
9453 #define ELF_MACHINE_CODE EM_MIPS
9454
9455 /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses
9456 a value of 0x1000, and we are compatible. */
9457 #define ELF_MAXPAGESIZE 0x1000
9458
9459 #define elf_backend_collect true
9460 #define elf_backend_type_change_ok true
9461 #define elf_backend_can_gc_sections true
9462 #define elf_backend_sign_extend_vma true
9463 #define elf_info_to_howto mips_info_to_howto_rela
9464 #define elf_info_to_howto_rel mips_info_to_howto_rel
9465 #define elf_backend_sym_is_global mips_elf_sym_is_global
9466 #define elf_backend_object_p _bfd_mips_elf_object_p
9467 #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr
9468 #define elf_backend_fake_sections _bfd_mips_elf_fake_sections
9469 #define elf_backend_section_from_bfd_section \
9470 _bfd_mips_elf_section_from_bfd_section
9471 #define elf_backend_section_processing _bfd_mips_elf_section_processing
9472 #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing
9473 #define elf_backend_additional_program_headers \
9474 _bfd_mips_elf_additional_program_headers
9475 #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map
9476 #define elf_backend_final_write_processing \
9477 _bfd_mips_elf_final_write_processing
9478 #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap
9479 #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook
9480 #define elf_backend_create_dynamic_sections \
9481 _bfd_mips_elf_create_dynamic_sections
9482 #define elf_backend_check_relocs _bfd_mips_elf_check_relocs
9483 #define elf_backend_adjust_dynamic_symbol \
9484 _bfd_mips_elf_adjust_dynamic_symbol
9485 #define elf_backend_always_size_sections \
9486 _bfd_mips_elf_always_size_sections
9487 #define elf_backend_size_dynamic_sections \
9488 _bfd_mips_elf_size_dynamic_sections
9489 #define elf_backend_relocate_section _bfd_mips_elf_relocate_section
9490 #define elf_backend_link_output_symbol_hook \
9491 _bfd_mips_elf_link_output_symbol_hook
9492 #define elf_backend_finish_dynamic_symbol \
9493 _bfd_mips_elf_finish_dynamic_symbol
9494 #define elf_backend_finish_dynamic_sections \
9495 _bfd_mips_elf_finish_dynamic_sections
9496 #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook
9497 #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook
9498
9499 #define elf_backend_got_header_size (4*MIPS_RESERVED_GOTNO)
9500 #define elf_backend_plt_header_size 0
9501
9502 #define elf_backend_copy_indirect_symbol \
9503 _bfd_mips_elf_copy_indirect_symbol
9504
9505 #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol
9506 #define elf_backend_grok_prstatus _bfd_elf32_mips_grok_prstatus
9507 #define elf_backend_grok_psinfo _bfd_elf32_mips_grok_psinfo
9508
9509 #define bfd_elf32_bfd_is_local_label_name \
9510 mips_elf_is_local_label_name
9511 #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line
9512 #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents
9513 #define bfd_elf32_bfd_link_hash_table_create \
9514 _bfd_mips_elf_link_hash_table_create
9515 #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link
9516 #define bfd_elf32_bfd_copy_private_bfd_data \
9517 _bfd_mips_elf_copy_private_bfd_data
9518 #define bfd_elf32_bfd_merge_private_bfd_data \
9519 _bfd_mips_elf_merge_private_bfd_data
9520 #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
9521 #define bfd_elf32_bfd_print_private_bfd_data \
9522 _bfd_mips_elf_print_private_bfd_data
9523 #include "elf32-target.h"
9524
9525 /* Support for traditional mips targets */
9526
9527 #define INCLUDED_TARGET_FILE /* More a type of flag */
9528
9529 #undef TARGET_LITTLE_SYM
9530 #undef TARGET_LITTLE_NAME
9531 #undef TARGET_BIG_SYM
9532 #undef TARGET_BIG_NAME
9533
9534 #define TARGET_LITTLE_SYM bfd_elf32_tradlittlemips_vec
9535 #define TARGET_LITTLE_NAME "elf32-tradlittlemips"
9536 #define TARGET_BIG_SYM bfd_elf32_tradbigmips_vec
9537 #define TARGET_BIG_NAME "elf32-tradbigmips"
9538
9539 /* Include the target file again for this target */
9540 #include "elf32-target.h"
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