2000-07-19 H.J. Lu <hjl@gnu.org>
[binutils.git] / bfd / elf32-mips.c
blob27ae18abb9823ec9e0c8acf472008a9fcec9f889
1 /* MIPS-specific support for 32-bit ELF
2 Copyright 1993, 94, 95, 96, 97, 98, 1999 Free Software Foundation, Inc.
4 Most of the information added by Ian Lance Taylor, Cygnus Support,
5 <ian@cygnus.com>.
6 N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC.
7 <mark@codesourcery.com>
8 Traditional MIPS targets support added by Koundinya.K, Dansk Data
9 Elektronik & Operations Research Group. <kk@ddeorg.soft.net>
11 This file is part of BFD, the Binary File Descriptor library.
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 /* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly
28 different MIPS ELF from other targets. This matters when linking.
29 This file supports both, switching at runtime. */
31 #include "bfd.h"
32 #include "sysdep.h"
33 #include "libbfd.h"
34 #include "bfdlink.h"
35 #include "genlink.h"
36 #include "elf-bfd.h"
37 #include "elf/mips.h"
39 /* Get the ECOFF swapping routines. */
40 #include "coff/sym.h"
41 #include "coff/symconst.h"
42 #include "coff/internal.h"
43 #include "coff/ecoff.h"
44 #include "coff/mips.h"
45 #define ECOFF_SIGNED_32
46 #include "ecoffswap.h"
48 /* This structure is used to hold .got information when linking. It
49 is stored in the tdata field of the bfd_elf_section_data structure. */
51 struct mips_got_info
53 /* The global symbol in the GOT with the lowest index in the dynamic
54 symbol table. */
55 struct elf_link_hash_entry *global_gotsym;
56 /* The number of global .got entries. */
57 unsigned int global_gotno;
58 /* The number of local .got entries. */
59 unsigned int local_gotno;
60 /* The number of local .got entries we have used. */
61 unsigned int assigned_gotno;
64 /* The MIPS ELF linker needs additional information for each symbol in
65 the global hash table. */
67 struct mips_elf_link_hash_entry
69 struct elf_link_hash_entry root;
71 /* External symbol information. */
72 EXTR esym;
74 /* Number of R_MIPS_32, R_MIPS_REL32, or R_MIPS_64 relocs against
75 this symbol. */
76 unsigned int possibly_dynamic_relocs;
78 /* The index of the first dynamic relocation (in the .rel.dyn
79 section) against this symbol. */
80 unsigned int min_dyn_reloc_index;
82 /* If there is a stub that 32 bit functions should use to call this
83 16 bit function, this points to the section containing the stub. */
84 asection *fn_stub;
86 /* Whether we need the fn_stub; this is set if this symbol appears
87 in any relocs other than a 16 bit call. */
88 boolean need_fn_stub;
90 /* If there is a stub that 16 bit functions should use to call this
91 32 bit function, this points to the section containing the stub. */
92 asection *call_stub;
94 /* This is like the call_stub field, but it is used if the function
95 being called returns a floating point value. */
96 asection *call_fp_stub;
99 static bfd_reloc_status_type mips32_64bit_reloc
100 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
101 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
102 PARAMS ((bfd *, bfd_reloc_code_real_type));
103 static reloc_howto_type *mips_rtype_to_howto
104 PARAMS ((unsigned int));
105 static void mips_info_to_howto_rel
106 PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
107 static void mips_info_to_howto_rela
108 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
109 static void bfd_mips_elf32_swap_gptab_in
110 PARAMS ((bfd *, const Elf32_External_gptab *, Elf32_gptab *));
111 static void bfd_mips_elf32_swap_gptab_out
112 PARAMS ((bfd *, const Elf32_gptab *, Elf32_External_gptab *));
113 #if 0
114 static void bfd_mips_elf_swap_msym_in
115 PARAMS ((bfd *, const Elf32_External_Msym *, Elf32_Internal_Msym *));
116 #endif
117 static void bfd_mips_elf_swap_msym_out
118 PARAMS ((bfd *, const Elf32_Internal_Msym *, Elf32_External_Msym *));
119 static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *));
120 static boolean mips_elf_create_procedure_table
121 PARAMS ((PTR, bfd *, struct bfd_link_info *, asection *,
122 struct ecoff_debug_info *));
123 static INLINE int elf_mips_isa PARAMS ((flagword));
124 static INLINE int elf_mips_mach PARAMS ((flagword));
125 static INLINE char* elf_mips_abi_name PARAMS ((bfd *));
126 static boolean mips_elf_is_local_label_name
127 PARAMS ((bfd *, const char *));
128 static struct bfd_hash_entry *mips_elf_link_hash_newfunc
129 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
130 static int gptab_compare PARAMS ((const void *, const void *));
131 static bfd_reloc_status_type mips16_jump_reloc
132 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
133 static bfd_reloc_status_type mips16_gprel_reloc
134 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
135 static boolean mips_elf_create_compact_rel_section
136 PARAMS ((bfd *, struct bfd_link_info *));
137 static boolean mips_elf_create_got_section
138 PARAMS ((bfd *, struct bfd_link_info *));
139 static bfd_reloc_status_type mips_elf_final_gp
140 PARAMS ((bfd *, asymbol *, boolean, char **, bfd_vma *));
141 static bfd_byte *elf32_mips_get_relocated_section_contents
142 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
143 bfd_byte *, boolean, asymbol **));
144 static asection *mips_elf_create_msym_section
145 PARAMS ((bfd *));
146 static void mips_elf_irix6_finish_dynamic_symbol
147 PARAMS ((bfd *, const char *, Elf_Internal_Sym *));
148 static bfd_vma mips_elf_sign_extend PARAMS ((bfd_vma, int));
149 static boolean mips_elf_overflow_p PARAMS ((bfd_vma, int));
150 static bfd_vma mips_elf_high PARAMS ((bfd_vma));
151 static bfd_vma mips_elf_higher PARAMS ((bfd_vma));
152 static bfd_vma mips_elf_highest PARAMS ((bfd_vma));
153 static bfd_vma mips_elf_global_got_index
154 PARAMS ((bfd *, struct elf_link_hash_entry *));
155 static bfd_vma mips_elf_local_got_index
156 PARAMS ((bfd *, struct bfd_link_info *, bfd_vma));
157 static bfd_vma mips_elf_got_offset_from_index
158 PARAMS ((bfd *, bfd *, bfd_vma));
159 static boolean mips_elf_record_global_got_symbol
160 PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *,
161 struct mips_got_info *));
162 static bfd_vma mips_elf_got_page
163 PARAMS ((bfd *, struct bfd_link_info *, bfd_vma, bfd_vma *));
164 static const Elf_Internal_Rela *mips_elf_next_relocation
165 PARAMS ((unsigned int, const Elf_Internal_Rela *,
166 const Elf_Internal_Rela *));
167 static bfd_reloc_status_type mips_elf_calculate_relocation
168 PARAMS ((bfd *, bfd *, asection *, struct bfd_link_info *,
169 const Elf_Internal_Rela *, bfd_vma, reloc_howto_type *,
170 Elf_Internal_Sym *, asection **, bfd_vma *, const char **,
171 boolean *));
172 static bfd_vma mips_elf_obtain_contents
173 PARAMS ((reloc_howto_type *, const Elf_Internal_Rela *, bfd *, bfd_byte *));
174 static boolean mips_elf_perform_relocation
175 PARAMS ((struct bfd_link_info *, reloc_howto_type *,
176 const Elf_Internal_Rela *, bfd_vma,
177 bfd *, asection *, bfd_byte *, boolean));
178 static boolean mips_elf_assign_gp PARAMS ((bfd *, bfd_vma *));
179 static boolean mips_elf_sort_hash_table_f
180 PARAMS ((struct mips_elf_link_hash_entry *, PTR));
181 static boolean mips_elf_sort_hash_table
182 PARAMS ((struct bfd_link_info *, unsigned long));
183 static asection * mips_elf_got_section PARAMS ((bfd *));
184 static struct mips_got_info *mips_elf_got_info
185 PARAMS ((bfd *, asection **));
186 static boolean mips_elf_local_relocation_p
187 PARAMS ((bfd *, const Elf_Internal_Rela *, asection **, boolean));
188 static bfd_vma mips_elf_create_local_got_entry
189 PARAMS ((bfd *, struct mips_got_info *, asection *, bfd_vma));
190 static bfd_vma mips_elf_got16_entry
191 PARAMS ((bfd *, struct bfd_link_info *, bfd_vma, boolean));
192 static boolean mips_elf_create_dynamic_relocation
193 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Rela *,
194 struct mips_elf_link_hash_entry *, asection *,
195 bfd_vma, bfd_vma *, asection *));
196 static void mips_elf_allocate_dynamic_relocations
197 PARAMS ((bfd *, unsigned int));
198 static boolean mips_elf_stub_section_p
199 PARAMS ((bfd *, asection *));
200 static int sort_dynamic_relocs
201 PARAMS ((const void *, const void *));
203 extern const bfd_target bfd_elf32_tradbigmips_vec;
205 /* The level of IRIX compatibility we're striving for. */
207 typedef enum {
208 ict_none,
209 ict_irix5,
210 ict_irix6
211 } irix_compat_t;
213 /* This will be used when we sort the dynamic relocation records. */
214 static bfd *reldyn_sorting_bfd;
216 /* Nonzero if ABFD is using the N32 ABI. */
218 #define ABI_N32_P(abfd) \
219 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0)
221 /* Nonzero if ABFD is using the 64-bit ABI. FIXME: This is never
222 true, yet. */
223 #define ABI_64_P(abfd) \
224 ((elf_elfheader (abfd)->e_ident[EI_CLASS] == ELFCLASS64) != 0)
226 /* Depending on the target vector we generate some version of Irix
227 executables or "normal" MIPS ELF ABI executables. */
229 #define IRIX_COMPAT(abfd) \
230 (abfd->xvec == &bfd_elf32_tradbigmips_vec ? ict_none : \
231 ((ABI_N32_P (abfd) || ABI_64_P (abfd)) ? ict_irix6 : ict_irix5))
233 /* Whether we are trying to be compatible with IRIX at all. */
235 #define SGI_COMPAT(abfd) \
236 (IRIX_COMPAT (abfd) != ict_none)
238 /* The name of the msym section. */
239 #define MIPS_ELF_MSYM_SECTION_NAME(abfd) ".msym"
241 /* The name of the srdata section. */
242 #define MIPS_ELF_SRDATA_SECTION_NAME(abfd) ".srdata"
244 /* The name of the options section. */
245 #define MIPS_ELF_OPTIONS_SECTION_NAME(abfd) \
246 (IRIX_COMPAT (abfd) == ict_irix6 ? ".MIPS.options" : ".options")
248 /* The name of the stub section. */
249 #define MIPS_ELF_STUB_SECTION_NAME(abfd) \
250 (IRIX_COMPAT (abfd) == ict_irix6 ? ".MIPS.stubs" : ".stub")
252 /* The name of the dynamic relocation section. */
253 #define MIPS_ELF_REL_DYN_SECTION_NAME(abfd) ".rel.dyn"
255 /* The size of an external REL relocation. */
256 #define MIPS_ELF_REL_SIZE(abfd) \
257 (get_elf_backend_data (abfd)->s->sizeof_rel)
259 /* The size of an external dynamic table entry. */
260 #define MIPS_ELF_DYN_SIZE(abfd) \
261 (get_elf_backend_data (abfd)->s->sizeof_dyn)
263 /* The size of a GOT entry. */
264 #define MIPS_ELF_GOT_SIZE(abfd) \
265 (get_elf_backend_data (abfd)->s->arch_size / 8)
267 /* The size of a symbol-table entry. */
268 #define MIPS_ELF_SYM_SIZE(abfd) \
269 (get_elf_backend_data (abfd)->s->sizeof_sym)
271 /* The default alignment for sections, as a power of two. */
272 #define MIPS_ELF_LOG_FILE_ALIGN(abfd) \
273 (get_elf_backend_data (abfd)->s->file_align == 8 ? 3 : 2)
275 /* Get word-sized data. */
276 #define MIPS_ELF_GET_WORD(abfd, ptr) \
277 (ABI_64_P (abfd) ? bfd_get_64 (abfd, ptr) : bfd_get_32 (abfd, ptr))
279 /* Put out word-sized data. */
280 #define MIPS_ELF_PUT_WORD(abfd, val, ptr) \
281 (ABI_64_P (abfd) \
282 ? bfd_put_64 (abfd, val, ptr) \
283 : bfd_put_32 (abfd, val, ptr))
285 /* Add a dynamic symbol table-entry. */
286 #ifdef BFD64
287 #define MIPS_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
288 (ABI_64_P (elf_hash_table (info)->dynobj) \
289 ? bfd_elf64_add_dynamic_entry (info, tag, val) \
290 : bfd_elf32_add_dynamic_entry (info, tag, val))
291 #else
292 #define MIPS_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
293 (ABI_64_P (elf_hash_table (info)->dynobj) \
294 ? (abort (), false) \
295 : bfd_elf32_add_dynamic_entry (info, tag, val))
296 #endif
298 /* The number of local .got entries we reserve. */
299 #define MIPS_RESERVED_GOTNO (2)
301 /* Instructions which appear in a stub. For some reason the stub is
302 slightly different on an SGI system. */
303 #define ELF_MIPS_GP_OFFSET(abfd) (SGI_COMPAT (abfd) ? 0x7ff0 : 0x8000)
304 #define STUB_LW(abfd) \
305 (SGI_COMPAT (abfd) \
306 ? (ABI_64_P (abfd) \
307 ? 0xdf998010 /* ld t9,0x8010(gp) */ \
308 : 0x8f998010) /* lw t9,0x8010(gp) */ \
309 : 0x8f998010) /* lw t9,0x8000(gp) */
310 #define STUB_MOVE(abfd) \
311 (SGI_COMPAT (abfd) ? 0x03e07825 : 0x03e07821) /* move t7,ra */
312 #define STUB_JALR 0x0320f809 /* jal t9 */
313 #define STUB_LI16(abfd) \
314 (SGI_COMPAT (abfd) ? 0x34180000 : 0x24180000) /* ori t8,zero,0 */
315 #define MIPS_FUNCTION_STUB_SIZE (16)
317 #if 0
318 /* We no longer try to identify particular sections for the .dynsym
319 section. When we do, we wind up crashing if there are other random
320 sections with relocations. */
322 /* Names of sections which appear in the .dynsym section in an Irix 5
323 executable. */
325 static const char * const mips_elf_dynsym_sec_names[] =
327 ".text",
328 ".init",
329 ".fini",
330 ".data",
331 ".rodata",
332 ".sdata",
333 ".sbss",
334 ".bss",
335 NULL
338 #define SIZEOF_MIPS_DYNSYM_SECNAMES \
339 (sizeof mips_elf_dynsym_sec_names / sizeof mips_elf_dynsym_sec_names[0])
341 /* The number of entries in mips_elf_dynsym_sec_names which go in the
342 text segment. */
344 #define MIPS_TEXT_DYNSYM_SECNO (3)
346 #endif /* 0 */
348 /* The names of the runtime procedure table symbols used on Irix 5. */
350 static const char * const mips_elf_dynsym_rtproc_names[] =
352 "_procedure_table",
353 "_procedure_string_table",
354 "_procedure_table_size",
355 NULL
358 /* These structures are used to generate the .compact_rel section on
359 Irix 5. */
361 typedef struct
363 unsigned long id1; /* Always one? */
364 unsigned long num; /* Number of compact relocation entries. */
365 unsigned long id2; /* Always two? */
366 unsigned long offset; /* The file offset of the first relocation. */
367 unsigned long reserved0; /* Zero? */
368 unsigned long reserved1; /* Zero? */
369 } Elf32_compact_rel;
371 typedef struct
373 bfd_byte id1[4];
374 bfd_byte num[4];
375 bfd_byte id2[4];
376 bfd_byte offset[4];
377 bfd_byte reserved0[4];
378 bfd_byte reserved1[4];
379 } Elf32_External_compact_rel;
381 typedef struct
383 unsigned int ctype : 1; /* 1: long 0: short format. See below. */
384 unsigned int rtype : 4; /* Relocation types. See below. */
385 unsigned int dist2to : 8;
386 unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */
387 unsigned long konst; /* KONST field. See below. */
388 unsigned long vaddr; /* VADDR to be relocated. */
389 } Elf32_crinfo;
391 typedef struct
393 unsigned int ctype : 1; /* 1: long 0: short format. See below. */
394 unsigned int rtype : 4; /* Relocation types. See below. */
395 unsigned int dist2to : 8;
396 unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */
397 unsigned long konst; /* KONST field. See below. */
398 } Elf32_crinfo2;
400 typedef struct
402 bfd_byte info[4];
403 bfd_byte konst[4];
404 bfd_byte vaddr[4];
405 } Elf32_External_crinfo;
407 typedef struct
409 bfd_byte info[4];
410 bfd_byte konst[4];
411 } Elf32_External_crinfo2;
413 /* These are the constants used to swap the bitfields in a crinfo. */
415 #define CRINFO_CTYPE (0x1)
416 #define CRINFO_CTYPE_SH (31)
417 #define CRINFO_RTYPE (0xf)
418 #define CRINFO_RTYPE_SH (27)
419 #define CRINFO_DIST2TO (0xff)
420 #define CRINFO_DIST2TO_SH (19)
421 #define CRINFO_RELVADDR (0x7ffff)
422 #define CRINFO_RELVADDR_SH (0)
424 /* A compact relocation info has long (3 words) or short (2 words)
425 formats. A short format doesn't have VADDR field and relvaddr
426 fields contains ((VADDR - vaddr of the previous entry) >> 2). */
427 #define CRF_MIPS_LONG 1
428 #define CRF_MIPS_SHORT 0
430 /* There are 4 types of compact relocation at least. The value KONST
431 has different meaning for each type:
433 (type) (konst)
434 CT_MIPS_REL32 Address in data
435 CT_MIPS_WORD Address in word (XXX)
436 CT_MIPS_GPHI_LO GP - vaddr
437 CT_MIPS_JMPAD Address to jump
440 #define CRT_MIPS_REL32 0xa
441 #define CRT_MIPS_WORD 0xb
442 #define CRT_MIPS_GPHI_LO 0xc
443 #define CRT_MIPS_JMPAD 0xd
445 #define mips_elf_set_cr_format(x,format) ((x).ctype = (format))
446 #define mips_elf_set_cr_type(x,type) ((x).rtype = (type))
447 #define mips_elf_set_cr_dist2to(x,v) ((x).dist2to = (v))
448 #define mips_elf_set_cr_relvaddr(x,d) ((x).relvaddr = (d)<<2)
450 static void bfd_elf32_swap_compact_rel_out
451 PARAMS ((bfd *, const Elf32_compact_rel *, Elf32_External_compact_rel *));
452 static void bfd_elf32_swap_crinfo_out
453 PARAMS ((bfd *, const Elf32_crinfo *, Elf32_External_crinfo *));
455 #define USE_REL 1 /* MIPS uses REL relocations instead of RELA */
457 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
458 from smaller values. Start with zero, widen, *then* decrement. */
459 #define MINUS_ONE (((bfd_vma)0) - 1)
461 static reloc_howto_type elf_mips_howto_table[] =
463 /* No relocation. */
464 HOWTO (R_MIPS_NONE, /* type */
465 0, /* rightshift */
466 0, /* size (0 = byte, 1 = short, 2 = long) */
467 0, /* bitsize */
468 false, /* pc_relative */
469 0, /* bitpos */
470 complain_overflow_dont, /* complain_on_overflow */
471 bfd_elf_generic_reloc, /* special_function */
472 "R_MIPS_NONE", /* name */
473 false, /* partial_inplace */
474 0, /* src_mask */
475 0, /* dst_mask */
476 false), /* pcrel_offset */
478 /* 16 bit relocation. */
479 HOWTO (R_MIPS_16, /* type */
480 0, /* rightshift */
481 1, /* size (0 = byte, 1 = short, 2 = long) */
482 16, /* bitsize */
483 false, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_bitfield, /* complain_on_overflow */
486 bfd_elf_generic_reloc, /* special_function */
487 "R_MIPS_16", /* name */
488 true, /* partial_inplace */
489 0xffff, /* src_mask */
490 0xffff, /* dst_mask */
491 false), /* pcrel_offset */
493 /* 32 bit relocation. */
494 HOWTO (R_MIPS_32, /* type */
495 0, /* rightshift */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
497 32, /* bitsize */
498 false, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_bitfield, /* complain_on_overflow */
501 bfd_elf_generic_reloc, /* special_function */
502 "R_MIPS_32", /* name */
503 true, /* partial_inplace */
504 0xffffffff, /* src_mask */
505 0xffffffff, /* dst_mask */
506 false), /* pcrel_offset */
508 /* 32 bit symbol relative relocation. */
509 HOWTO (R_MIPS_REL32, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 false, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_bitfield, /* complain_on_overflow */
516 bfd_elf_generic_reloc, /* special_function */
517 "R_MIPS_REL32", /* name */
518 true, /* partial_inplace */
519 0xffffffff, /* src_mask */
520 0xffffffff, /* dst_mask */
521 false), /* pcrel_offset */
523 /* 26 bit branch address. */
524 HOWTO (R_MIPS_26, /* type */
525 2, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 26, /* bitsize */
528 false, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 /* This needs complex overflow
532 detection, because the upper four
533 bits must match the PC. */
534 bfd_elf_generic_reloc, /* special_function */
535 "R_MIPS_26", /* name */
536 true, /* partial_inplace */
537 0x3ffffff, /* src_mask */
538 0x3ffffff, /* dst_mask */
539 false), /* pcrel_offset */
541 /* High 16 bits of symbol value. */
542 HOWTO (R_MIPS_HI16, /* type */
543 0, /* rightshift */
544 2, /* size (0 = byte, 1 = short, 2 = long) */
545 16, /* bitsize */
546 false, /* pc_relative */
547 0, /* bitpos */
548 complain_overflow_dont, /* complain_on_overflow */
549 _bfd_mips_elf_hi16_reloc, /* special_function */
550 "R_MIPS_HI16", /* name */
551 true, /* partial_inplace */
552 0xffff, /* src_mask */
553 0xffff, /* dst_mask */
554 false), /* pcrel_offset */
556 /* Low 16 bits of symbol value. */
557 HOWTO (R_MIPS_LO16, /* type */
558 0, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 16, /* bitsize */
561 false, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 _bfd_mips_elf_lo16_reloc, /* special_function */
565 "R_MIPS_LO16", /* name */
566 true, /* partial_inplace */
567 0xffff, /* src_mask */
568 0xffff, /* dst_mask */
569 false), /* pcrel_offset */
571 /* GP relative reference. */
572 HOWTO (R_MIPS_GPREL16, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 16, /* bitsize */
576 false, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_signed, /* complain_on_overflow */
579 _bfd_mips_elf_gprel16_reloc, /* special_function */
580 "R_MIPS_GPREL16", /* name */
581 true, /* partial_inplace */
582 0xffff, /* src_mask */
583 0xffff, /* dst_mask */
584 false), /* pcrel_offset */
586 /* Reference to literal section. */
587 HOWTO (R_MIPS_LITERAL, /* type */
588 0, /* rightshift */
589 2, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 false, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_signed, /* complain_on_overflow */
594 _bfd_mips_elf_gprel16_reloc, /* special_function */
595 "R_MIPS_LITERAL", /* name */
596 true, /* partial_inplace */
597 0xffff, /* src_mask */
598 0xffff, /* dst_mask */
599 false), /* pcrel_offset */
601 /* Reference to global offset table. */
602 HOWTO (R_MIPS_GOT16, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 16, /* bitsize */
606 false, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_signed, /* complain_on_overflow */
609 _bfd_mips_elf_got16_reloc, /* special_function */
610 "R_MIPS_GOT16", /* name */
611 false, /* partial_inplace */
612 0xffff, /* src_mask */
613 0xffff, /* dst_mask */
614 false), /* pcrel_offset */
616 /* 16 bit PC relative reference. */
617 HOWTO (R_MIPS_PC16, /* type */
618 0, /* rightshift */
619 2, /* size (0 = byte, 1 = short, 2 = long) */
620 16, /* bitsize */
621 true, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_signed, /* complain_on_overflow */
624 bfd_elf_generic_reloc, /* special_function */
625 "R_MIPS_PC16", /* name */
626 true, /* partial_inplace */
627 0xffff, /* src_mask */
628 0xffff, /* dst_mask */
629 true), /* pcrel_offset */
631 /* 16 bit call through global offset table. */
632 HOWTO (R_MIPS_CALL16, /* type */
633 0, /* rightshift */
634 2, /* size (0 = byte, 1 = short, 2 = long) */
635 16, /* bitsize */
636 false, /* pc_relative */
637 0, /* bitpos */
638 complain_overflow_signed, /* complain_on_overflow */
639 bfd_elf_generic_reloc, /* special_function */
640 "R_MIPS_CALL16", /* name */
641 false, /* partial_inplace */
642 0xffff, /* src_mask */
643 0xffff, /* dst_mask */
644 false), /* pcrel_offset */
646 /* 32 bit GP relative reference. */
647 HOWTO (R_MIPS_GPREL32, /* type */
648 0, /* rightshift */
649 2, /* size (0 = byte, 1 = short, 2 = long) */
650 32, /* bitsize */
651 false, /* pc_relative */
652 0, /* bitpos */
653 complain_overflow_bitfield, /* complain_on_overflow */
654 _bfd_mips_elf_gprel32_reloc, /* special_function */
655 "R_MIPS_GPREL32", /* name */
656 true, /* partial_inplace */
657 0xffffffff, /* src_mask */
658 0xffffffff, /* dst_mask */
659 false), /* pcrel_offset */
661 /* The remaining relocs are defined on Irix 5, although they are
662 not defined by the ABI. */
663 EMPTY_HOWTO (13),
664 EMPTY_HOWTO (14),
665 EMPTY_HOWTO (15),
667 /* A 5 bit shift field. */
668 HOWTO (R_MIPS_SHIFT5, /* type */
669 0, /* rightshift */
670 2, /* size (0 = byte, 1 = short, 2 = long) */
671 5, /* bitsize */
672 false, /* pc_relative */
673 6, /* bitpos */
674 complain_overflow_bitfield, /* complain_on_overflow */
675 bfd_elf_generic_reloc, /* special_function */
676 "R_MIPS_SHIFT5", /* name */
677 true, /* partial_inplace */
678 0x000007c0, /* src_mask */
679 0x000007c0, /* dst_mask */
680 false), /* pcrel_offset */
682 /* A 6 bit shift field. */
683 /* FIXME: This is not handled correctly; a special function is
684 needed to put the most significant bit in the right place. */
685 HOWTO (R_MIPS_SHIFT6, /* type */
686 0, /* rightshift */
687 2, /* size (0 = byte, 1 = short, 2 = long) */
688 6, /* bitsize */
689 false, /* pc_relative */
690 6, /* bitpos */
691 complain_overflow_bitfield, /* complain_on_overflow */
692 bfd_elf_generic_reloc, /* special_function */
693 "R_MIPS_SHIFT6", /* name */
694 true, /* partial_inplace */
695 0x000007c4, /* src_mask */
696 0x000007c4, /* dst_mask */
697 false), /* pcrel_offset */
699 /* A 64 bit relocation. */
700 HOWTO (R_MIPS_64, /* type */
701 0, /* rightshift */
702 4, /* size (0 = byte, 1 = short, 2 = long) */
703 64, /* bitsize */
704 false, /* pc_relative */
705 0, /* bitpos */
706 complain_overflow_bitfield, /* complain_on_overflow */
707 mips32_64bit_reloc, /* special_function */
708 "R_MIPS_64", /* name */
709 true, /* partial_inplace */
710 MINUS_ONE, /* src_mask */
711 MINUS_ONE, /* dst_mask */
712 false), /* pcrel_offset */
714 /* Displacement in the global offset table. */
715 HOWTO (R_MIPS_GOT_DISP, /* type */
716 0, /* rightshift */
717 2, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 false, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_bitfield, /* complain_on_overflow */
722 bfd_elf_generic_reloc, /* special_function */
723 "R_MIPS_GOT_DISP", /* name */
724 true, /* partial_inplace */
725 0x0000ffff, /* src_mask */
726 0x0000ffff, /* dst_mask */
727 false), /* pcrel_offset */
729 /* Displacement to page pointer in the global offset table. */
730 HOWTO (R_MIPS_GOT_PAGE, /* type */
731 0, /* rightshift */
732 2, /* size (0 = byte, 1 = short, 2 = long) */
733 16, /* bitsize */
734 false, /* pc_relative */
735 0, /* bitpos */
736 complain_overflow_bitfield, /* complain_on_overflow */
737 bfd_elf_generic_reloc, /* special_function */
738 "R_MIPS_GOT_PAGE", /* name */
739 true, /* partial_inplace */
740 0x0000ffff, /* src_mask */
741 0x0000ffff, /* dst_mask */
742 false), /* pcrel_offset */
744 /* Offset from page pointer in the global offset table. */
745 HOWTO (R_MIPS_GOT_OFST, /* type */
746 0, /* rightshift */
747 2, /* size (0 = byte, 1 = short, 2 = long) */
748 16, /* bitsize */
749 false, /* pc_relative */
750 0, /* bitpos */
751 complain_overflow_bitfield, /* complain_on_overflow */
752 bfd_elf_generic_reloc, /* special_function */
753 "R_MIPS_GOT_OFST", /* name */
754 true, /* partial_inplace */
755 0x0000ffff, /* src_mask */
756 0x0000ffff, /* dst_mask */
757 false), /* pcrel_offset */
759 /* High 16 bits of displacement in global offset table. */
760 HOWTO (R_MIPS_GOT_HI16, /* type */
761 0, /* rightshift */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
763 16, /* bitsize */
764 false, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_MIPS_GOT_HI16", /* name */
769 true, /* partial_inplace */
770 0x0000ffff, /* src_mask */
771 0x0000ffff, /* dst_mask */
772 false), /* pcrel_offset */
774 /* Low 16 bits of displacement in global offset table. */
775 HOWTO (R_MIPS_GOT_LO16, /* type */
776 0, /* rightshift */
777 2, /* size (0 = byte, 1 = short, 2 = long) */
778 16, /* bitsize */
779 false, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_MIPS_GOT_LO16", /* name */
784 true, /* partial_inplace */
785 0x0000ffff, /* src_mask */
786 0x0000ffff, /* dst_mask */
787 false), /* pcrel_offset */
789 /* 64 bit subtraction. Used in the N32 ABI. */
790 HOWTO (R_MIPS_SUB, /* type */
791 0, /* rightshift */
792 4, /* size (0 = byte, 1 = short, 2 = long) */
793 64, /* bitsize */
794 false, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_bitfield, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_MIPS_SUB", /* name */
799 true, /* partial_inplace */
800 MINUS_ONE, /* src_mask */
801 MINUS_ONE, /* dst_mask */
802 false), /* pcrel_offset */
804 /* Used to cause the linker to insert and delete instructions? */
805 EMPTY_HOWTO (R_MIPS_INSERT_A),
806 EMPTY_HOWTO (R_MIPS_INSERT_B),
807 EMPTY_HOWTO (R_MIPS_DELETE),
809 /* Get the higher value of a 64 bit addend. */
810 HOWTO (R_MIPS_HIGHER, /* type */
811 0, /* rightshift */
812 2, /* size (0 = byte, 1 = short, 2 = long) */
813 16, /* bitsize */
814 false, /* pc_relative */
815 0, /* bitpos */
816 complain_overflow_dont, /* complain_on_overflow */
817 bfd_elf_generic_reloc, /* special_function */
818 "R_MIPS_HIGHER", /* name */
819 true, /* partial_inplace */
820 0, /* src_mask */
821 0xffff, /* dst_mask */
822 false), /* pcrel_offset */
824 /* Get the highest value of a 64 bit addend. */
825 HOWTO (R_MIPS_HIGHEST, /* type */
826 0, /* rightshift */
827 2, /* size (0 = byte, 1 = short, 2 = long) */
828 16, /* bitsize */
829 false, /* pc_relative */
830 0, /* bitpos */
831 complain_overflow_dont, /* complain_on_overflow */
832 bfd_elf_generic_reloc, /* special_function */
833 "R_MIPS_HIGHEST", /* name */
834 true, /* partial_inplace */
835 0, /* src_mask */
836 0xffff, /* dst_mask */
837 false), /* pcrel_offset */
839 /* High 16 bits of displacement in global offset table. */
840 HOWTO (R_MIPS_CALL_HI16, /* type */
841 0, /* rightshift */
842 2, /* size (0 = byte, 1 = short, 2 = long) */
843 16, /* bitsize */
844 false, /* pc_relative */
845 0, /* bitpos */
846 complain_overflow_dont, /* complain_on_overflow */
847 bfd_elf_generic_reloc, /* special_function */
848 "R_MIPS_CALL_HI16", /* name */
849 true, /* partial_inplace */
850 0x0000ffff, /* src_mask */
851 0x0000ffff, /* dst_mask */
852 false), /* pcrel_offset */
854 /* Low 16 bits of displacement in global offset table. */
855 HOWTO (R_MIPS_CALL_LO16, /* type */
856 0, /* rightshift */
857 2, /* size (0 = byte, 1 = short, 2 = long) */
858 16, /* bitsize */
859 false, /* pc_relative */
860 0, /* bitpos */
861 complain_overflow_dont, /* complain_on_overflow */
862 bfd_elf_generic_reloc, /* special_function */
863 "R_MIPS_CALL_LO16", /* name */
864 true, /* partial_inplace */
865 0x0000ffff, /* src_mask */
866 0x0000ffff, /* dst_mask */
867 false), /* pcrel_offset */
869 /* Section displacement. */
870 HOWTO (R_MIPS_SCN_DISP, /* type */
871 0, /* rightshift */
872 2, /* size (0 = byte, 1 = short, 2 = long) */
873 32, /* bitsize */
874 false, /* pc_relative */
875 0, /* bitpos */
876 complain_overflow_dont, /* complain_on_overflow */
877 bfd_elf_generic_reloc, /* special_function */
878 "R_MIPS_SCN_DISP", /* name */
879 false, /* partial_inplace */
880 0xffffffff, /* src_mask */
881 0xffffffff, /* dst_mask */
882 false), /* pcrel_offset */
884 EMPTY_HOWTO (R_MIPS_REL16),
885 EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE),
886 EMPTY_HOWTO (R_MIPS_PJUMP),
887 EMPTY_HOWTO (R_MIPS_RELGOT),
889 /* Protected jump conversion. This is an optimization hint. No
890 relocation is required for correctness. */
891 HOWTO (R_MIPS_JALR, /* type */
892 0, /* rightshift */
893 0, /* size (0 = byte, 1 = short, 2 = long) */
894 0, /* bitsize */
895 false, /* pc_relative */
896 0, /* bitpos */
897 complain_overflow_dont, /* complain_on_overflow */
898 bfd_elf_generic_reloc, /* special_function */
899 "R_MIPS_JALR", /* name */
900 false, /* partial_inplace */
901 0x00000000, /* src_mask */
902 0x00000000, /* dst_mask */
903 false), /* pcrel_offset */
906 /* The reloc used for BFD_RELOC_CTOR when doing a 64 bit link. This
907 is a hack to make the linker think that we need 64 bit values. */
908 static reloc_howto_type elf_mips_ctor64_howto =
909 HOWTO (R_MIPS_64, /* type */
910 0, /* rightshift */
911 4, /* size (0 = byte, 1 = short, 2 = long) */
912 32, /* bitsize */
913 false, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_signed, /* complain_on_overflow */
916 mips32_64bit_reloc, /* special_function */
917 "R_MIPS_64", /* name */
918 true, /* partial_inplace */
919 0xffffffff, /* src_mask */
920 0xffffffff, /* dst_mask */
921 false); /* pcrel_offset */
923 /* The reloc used for the mips16 jump instruction. */
924 static reloc_howto_type elf_mips16_jump_howto =
925 HOWTO (R_MIPS16_26, /* type */
926 2, /* rightshift */
927 2, /* size (0 = byte, 1 = short, 2 = long) */
928 26, /* bitsize */
929 false, /* pc_relative */
930 0, /* bitpos */
931 complain_overflow_dont, /* complain_on_overflow */
932 /* This needs complex overflow
933 detection, because the upper four
934 bits must match the PC. */
935 mips16_jump_reloc, /* special_function */
936 "R_MIPS16_26", /* name */
937 true, /* partial_inplace */
938 0x3ffffff, /* src_mask */
939 0x3ffffff, /* dst_mask */
940 false); /* pcrel_offset */
942 /* The reloc used for the mips16 gprel instruction. */
943 static reloc_howto_type elf_mips16_gprel_howto =
944 HOWTO (R_MIPS16_GPREL, /* type */
945 0, /* rightshift */
946 2, /* size (0 = byte, 1 = short, 2 = long) */
947 16, /* bitsize */
948 false, /* pc_relative */
949 0, /* bitpos */
950 complain_overflow_signed, /* complain_on_overflow */
951 mips16_gprel_reloc, /* special_function */
952 "R_MIPS16_GPREL", /* name */
953 true, /* partial_inplace */
954 0x07ff001f, /* src_mask */
955 0x07ff001f, /* dst_mask */
956 false); /* pcrel_offset */
958 /* GNU extensions for embedded-pic. */
959 /* High 16 bits of symbol value, pc-relative. */
960 static reloc_howto_type elf_mips_gnu_rel_hi16 =
961 HOWTO (R_MIPS_GNU_REL_HI16, /* type */
962 0, /* rightshift */
963 2, /* size (0 = byte, 1 = short, 2 = long) */
964 16, /* bitsize */
965 true, /* pc_relative */
966 0, /* bitpos */
967 complain_overflow_dont, /* complain_on_overflow */
968 _bfd_mips_elf_hi16_reloc, /* special_function */
969 "R_MIPS_GNU_REL_HI16", /* name */
970 true, /* partial_inplace */
971 0xffff, /* src_mask */
972 0xffff, /* dst_mask */
973 true); /* pcrel_offset */
975 /* Low 16 bits of symbol value, pc-relative. */
976 static reloc_howto_type elf_mips_gnu_rel_lo16 =
977 HOWTO (R_MIPS_GNU_REL_LO16, /* type */
978 0, /* rightshift */
979 2, /* size (0 = byte, 1 = short, 2 = long) */
980 16, /* bitsize */
981 true, /* pc_relative */
982 0, /* bitpos */
983 complain_overflow_dont, /* complain_on_overflow */
984 _bfd_mips_elf_lo16_reloc, /* special_function */
985 "R_MIPS_GNU_REL_LO16", /* name */
986 true, /* partial_inplace */
987 0xffff, /* src_mask */
988 0xffff, /* dst_mask */
989 true); /* pcrel_offset */
991 /* 16 bit offset for pc-relative branches. */
992 static reloc_howto_type elf_mips_gnu_rel16_s2 =
993 HOWTO (R_MIPS_GNU_REL16_S2, /* type */
994 2, /* rightshift */
995 2, /* size (0 = byte, 1 = short, 2 = long) */
996 16, /* bitsize */
997 true, /* pc_relative */
998 0, /* bitpos */
999 complain_overflow_signed, /* complain_on_overflow */
1000 bfd_elf_generic_reloc, /* special_function */
1001 "R_MIPS_GNU_REL16_S2", /* name */
1002 true, /* partial_inplace */
1003 0xffff, /* src_mask */
1004 0xffff, /* dst_mask */
1005 true); /* pcrel_offset */
1007 /* 64 bit pc-relative. */
1008 static reloc_howto_type elf_mips_gnu_pcrel64 =
1009 HOWTO (R_MIPS_PC64, /* type */
1010 0, /* rightshift */
1011 4, /* size (0 = byte, 1 = short, 2 = long) */
1012 64, /* bitsize */
1013 true, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_signed, /* complain_on_overflow */
1016 bfd_elf_generic_reloc, /* special_function */
1017 "R_MIPS_PC64", /* name */
1018 true, /* partial_inplace */
1019 MINUS_ONE, /* src_mask */
1020 MINUS_ONE, /* dst_mask */
1021 true); /* pcrel_offset */
1023 /* 32 bit pc-relative. */
1024 static reloc_howto_type elf_mips_gnu_pcrel32 =
1025 HOWTO (R_MIPS_PC32, /* type */
1026 0, /* rightshift */
1027 2, /* size (0 = byte, 1 = short, 2 = long) */
1028 32, /* 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_PC32", /* name */
1034 true, /* partial_inplace */
1035 0xffffffff, /* src_mask */
1036 0xffffffff, /* dst_mask */
1037 true); /* pcrel_offset */
1039 /* GNU extension to record C++ vtable hierarchy */
1040 static reloc_howto_type elf_mips_gnu_vtinherit_howto =
1041 HOWTO (R_MIPS_GNU_VTINHERIT, /* type */
1042 0, /* rightshift */
1043 2, /* size (0 = byte, 1 = short, 2 = long) */
1044 0, /* bitsize */
1045 false, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_dont, /* complain_on_overflow */
1048 NULL, /* special_function */
1049 "R_MIPS_GNU_VTINHERIT", /* name */
1050 false, /* partial_inplace */
1051 0, /* src_mask */
1052 0, /* dst_mask */
1053 false); /* pcrel_offset */
1055 /* GNU extension to record C++ vtable member usage */
1056 static reloc_howto_type elf_mips_gnu_vtentry_howto =
1057 HOWTO (R_MIPS_GNU_VTENTRY, /* type */
1058 0, /* rightshift */
1059 2, /* size (0 = byte, 1 = short, 2 = long) */
1060 0, /* bitsize */
1061 false, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_dont, /* complain_on_overflow */
1064 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1065 "R_MIPS_GNU_VTENTRY", /* name */
1066 false, /* partial_inplace */
1067 0, /* src_mask */
1068 0, /* dst_mask */
1069 false); /* pcrel_offset */
1071 /* Do a R_MIPS_HI16 relocation. This has to be done in combination
1072 with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to
1073 the HI16. Here we just save the information we need; we do the
1074 actual relocation when we see the LO16. MIPS ELF requires that the
1075 LO16 immediately follow the HI16. As a GNU extension, we permit an
1076 arbitrary number of HI16 relocs to be associated with a single LO16
1077 reloc. This extension permits gcc to output the HI and LO relocs
1078 itself. */
1080 struct mips_hi16
1082 struct mips_hi16 *next;
1083 bfd_byte *addr;
1084 bfd_vma addend;
1087 /* FIXME: This should not be a static variable. */
1089 static struct mips_hi16 *mips_hi16_list;
1091 bfd_reloc_status_type
1092 _bfd_mips_elf_hi16_reloc (abfd,
1093 reloc_entry,
1094 symbol,
1095 data,
1096 input_section,
1097 output_bfd,
1098 error_message)
1099 bfd *abfd ATTRIBUTE_UNUSED;
1100 arelent *reloc_entry;
1101 asymbol *symbol;
1102 PTR data;
1103 asection *input_section;
1104 bfd *output_bfd;
1105 char **error_message;
1107 bfd_reloc_status_type ret;
1108 bfd_vma relocation;
1109 struct mips_hi16 *n;
1111 /* If we're relocating, and this an external symbol, we don't want
1112 to change anything. */
1113 if (output_bfd != (bfd *) NULL
1114 && (symbol->flags & BSF_SECTION_SYM) == 0
1115 && reloc_entry->addend == 0)
1117 reloc_entry->address += input_section->output_offset;
1118 return bfd_reloc_ok;
1121 ret = bfd_reloc_ok;
1123 if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
1125 boolean relocateable;
1126 bfd_vma gp;
1128 if (ret == bfd_reloc_undefined)
1129 abort ();
1131 if (output_bfd != NULL)
1132 relocateable = true;
1133 else
1135 relocateable = false;
1136 output_bfd = symbol->section->output_section->owner;
1139 ret = mips_elf_final_gp (output_bfd, symbol, relocateable,
1140 error_message, &gp);
1141 if (ret != bfd_reloc_ok)
1142 return ret;
1144 relocation = gp - reloc_entry->address;
1146 else
1148 if (bfd_is_und_section (symbol->section)
1149 && output_bfd == (bfd *) NULL)
1150 ret = bfd_reloc_undefined;
1152 if (bfd_is_com_section (symbol->section))
1153 relocation = 0;
1154 else
1155 relocation = symbol->value;
1158 relocation += symbol->section->output_section->vma;
1159 relocation += symbol->section->output_offset;
1160 relocation += reloc_entry->addend;
1162 if (reloc_entry->address > input_section->_cooked_size)
1163 return bfd_reloc_outofrange;
1165 /* Save the information, and let LO16 do the actual relocation. */
1166 n = (struct mips_hi16 *) bfd_malloc (sizeof *n);
1167 if (n == NULL)
1168 return bfd_reloc_outofrange;
1169 n->addr = (bfd_byte *) data + reloc_entry->address;
1170 n->addend = relocation;
1171 n->next = mips_hi16_list;
1172 mips_hi16_list = n;
1174 if (output_bfd != (bfd *) NULL)
1175 reloc_entry->address += input_section->output_offset;
1177 return ret;
1180 /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit
1181 inplace relocation; this function exists in order to do the
1182 R_MIPS_HI16 relocation described above. */
1184 bfd_reloc_status_type
1185 _bfd_mips_elf_lo16_reloc (abfd,
1186 reloc_entry,
1187 symbol,
1188 data,
1189 input_section,
1190 output_bfd,
1191 error_message)
1192 bfd *abfd;
1193 arelent *reloc_entry;
1194 asymbol *symbol;
1195 PTR data;
1196 asection *input_section;
1197 bfd *output_bfd;
1198 char **error_message;
1200 arelent gp_disp_relent;
1202 if (mips_hi16_list != NULL)
1204 struct mips_hi16 *l;
1206 l = mips_hi16_list;
1207 while (l != NULL)
1209 unsigned long insn;
1210 unsigned long val;
1211 unsigned long vallo;
1212 struct mips_hi16 *next;
1214 /* Do the HI16 relocation. Note that we actually don't need
1215 to know anything about the LO16 itself, except where to
1216 find the low 16 bits of the addend needed by the LO16. */
1217 insn = bfd_get_32 (abfd, l->addr);
1218 vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
1219 & 0xffff);
1220 val = ((insn & 0xffff) << 16) + vallo;
1221 val += l->addend;
1223 /* The low order 16 bits are always treated as a signed
1224 value. Therefore, a negative value in the low order bits
1225 requires an adjustment in the high order bits. We need
1226 to make this adjustment in two ways: once for the bits we
1227 took from the data, and once for the bits we are putting
1228 back in to the data. */
1229 if ((vallo & 0x8000) != 0)
1230 val -= 0x10000;
1231 if ((val & 0x8000) != 0)
1232 val += 0x10000;
1234 insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff);
1235 bfd_put_32 (abfd, insn, l->addr);
1237 if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
1239 gp_disp_relent = *reloc_entry;
1240 reloc_entry = &gp_disp_relent;
1241 reloc_entry->addend = l->addend;
1244 next = l->next;
1245 free (l);
1246 l = next;
1249 mips_hi16_list = NULL;
1251 else if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
1253 bfd_reloc_status_type ret;
1254 bfd_vma gp, relocation;
1256 /* FIXME: Does this case ever occur? */
1258 ret = mips_elf_final_gp (output_bfd, symbol, true, error_message, &gp);
1259 if (ret != bfd_reloc_ok)
1260 return ret;
1262 relocation = gp - reloc_entry->address;
1263 relocation += symbol->section->output_section->vma;
1264 relocation += symbol->section->output_offset;
1265 relocation += reloc_entry->addend;
1267 if (reloc_entry->address > input_section->_cooked_size)
1268 return bfd_reloc_outofrange;
1270 gp_disp_relent = *reloc_entry;
1271 reloc_entry = &gp_disp_relent;
1272 reloc_entry->addend = relocation - 4;
1275 /* Now do the LO16 reloc in the usual way. */
1276 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1277 input_section, output_bfd, error_message);
1280 /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset
1281 table used for PIC code. If the symbol is an external symbol, the
1282 instruction is modified to contain the offset of the appropriate
1283 entry in the global offset table. If the symbol is a section
1284 symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit
1285 addends are combined to form the real addend against the section
1286 symbol; the GOT16 is modified to contain the offset of an entry in
1287 the global offset table, and the LO16 is modified to offset it
1288 appropriately. Thus an offset larger than 16 bits requires a
1289 modified value in the global offset table.
1291 This implementation suffices for the assembler, but the linker does
1292 not yet know how to create global offset tables. */
1294 bfd_reloc_status_type
1295 _bfd_mips_elf_got16_reloc (abfd,
1296 reloc_entry,
1297 symbol,
1298 data,
1299 input_section,
1300 output_bfd,
1301 error_message)
1302 bfd *abfd;
1303 arelent *reloc_entry;
1304 asymbol *symbol;
1305 PTR data;
1306 asection *input_section;
1307 bfd *output_bfd;
1308 char **error_message;
1310 /* If we're relocating, and this an external symbol, we don't want
1311 to change anything. */
1312 if (output_bfd != (bfd *) NULL
1313 && (symbol->flags & BSF_SECTION_SYM) == 0
1314 && reloc_entry->addend == 0)
1316 reloc_entry->address += input_section->output_offset;
1317 return bfd_reloc_ok;
1320 /* If we're relocating, and this is a local symbol, we can handle it
1321 just like HI16. */
1322 if (output_bfd != (bfd *) NULL
1323 && (symbol->flags & BSF_SECTION_SYM) != 0)
1324 return _bfd_mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
1325 input_section, output_bfd, error_message);
1327 abort ();
1330 /* Set the GP value for OUTPUT_BFD. Returns false if this is a
1331 dangerous relocation. */
1333 static boolean
1334 mips_elf_assign_gp (output_bfd, pgp)
1335 bfd *output_bfd;
1336 bfd_vma *pgp;
1338 unsigned int count;
1339 asymbol **sym;
1340 unsigned int i;
1342 /* If we've already figured out what GP will be, just return it. */
1343 *pgp = _bfd_get_gp_value (output_bfd);
1344 if (*pgp)
1345 return true;
1347 count = bfd_get_symcount (output_bfd);
1348 sym = bfd_get_outsymbols (output_bfd);
1350 /* The linker script will have created a symbol named `_gp' with the
1351 appropriate value. */
1352 if (sym == (asymbol **) NULL)
1353 i = count;
1354 else
1356 for (i = 0; i < count; i++, sym++)
1358 register CONST char *name;
1360 name = bfd_asymbol_name (*sym);
1361 if (*name == '_' && strcmp (name, "_gp") == 0)
1363 *pgp = bfd_asymbol_value (*sym);
1364 _bfd_set_gp_value (output_bfd, *pgp);
1365 break;
1370 if (i >= count)
1372 /* Only get the error once. */
1373 *pgp = 4;
1374 _bfd_set_gp_value (output_bfd, *pgp);
1375 return false;
1378 return true;
1381 /* We have to figure out the gp value, so that we can adjust the
1382 symbol value correctly. We look up the symbol _gp in the output
1383 BFD. If we can't find it, we're stuck. We cache it in the ELF
1384 target data. We don't need to adjust the symbol value for an
1385 external symbol if we are producing relocateable output. */
1387 static bfd_reloc_status_type
1388 mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, pgp)
1389 bfd *output_bfd;
1390 asymbol *symbol;
1391 boolean relocateable;
1392 char **error_message;
1393 bfd_vma *pgp;
1395 if (bfd_is_und_section (symbol->section)
1396 && ! relocateable)
1398 *pgp = 0;
1399 return bfd_reloc_undefined;
1402 *pgp = _bfd_get_gp_value (output_bfd);
1403 if (*pgp == 0
1404 && (! relocateable
1405 || (symbol->flags & BSF_SECTION_SYM) != 0))
1407 if (relocateable)
1409 /* Make up a value. */
1410 *pgp = symbol->section->output_section->vma + 0x4000;
1411 _bfd_set_gp_value (output_bfd, *pgp);
1413 else if (!mips_elf_assign_gp (output_bfd, pgp))
1415 *error_message =
1416 (char *) _("GP relative relocation when _gp not defined");
1417 return bfd_reloc_dangerous;
1421 return bfd_reloc_ok;
1424 /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
1425 become the offset from the gp register. This function also handles
1426 R_MIPS_LITERAL relocations, although those can be handled more
1427 cleverly because the entries in the .lit8 and .lit4 sections can be
1428 merged. */
1430 static bfd_reloc_status_type gprel16_with_gp PARAMS ((bfd *, asymbol *,
1431 arelent *, asection *,
1432 boolean, PTR, bfd_vma));
1434 bfd_reloc_status_type
1435 _bfd_mips_elf_gprel16_reloc (abfd, reloc_entry, symbol, data, input_section,
1436 output_bfd, error_message)
1437 bfd *abfd;
1438 arelent *reloc_entry;
1439 asymbol *symbol;
1440 PTR data;
1441 asection *input_section;
1442 bfd *output_bfd;
1443 char **error_message;
1445 boolean relocateable;
1446 bfd_reloc_status_type ret;
1447 bfd_vma gp;
1449 /* If we're relocating, and this is an external symbol with no
1450 addend, we don't want to change anything. We will only have an
1451 addend if this is a newly created reloc, not read from an ELF
1452 file. */
1453 if (output_bfd != (bfd *) NULL
1454 && (symbol->flags & BSF_SECTION_SYM) == 0
1455 && reloc_entry->addend == 0)
1457 reloc_entry->address += input_section->output_offset;
1458 return bfd_reloc_ok;
1461 if (output_bfd != (bfd *) NULL)
1462 relocateable = true;
1463 else
1465 relocateable = false;
1466 output_bfd = symbol->section->output_section->owner;
1469 ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
1470 &gp);
1471 if (ret != bfd_reloc_ok)
1472 return ret;
1474 return gprel16_with_gp (abfd, symbol, reloc_entry, input_section,
1475 relocateable, data, gp);
1478 static bfd_reloc_status_type
1479 gprel16_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data,
1481 bfd *abfd;
1482 asymbol *symbol;
1483 arelent *reloc_entry;
1484 asection *input_section;
1485 boolean relocateable;
1486 PTR data;
1487 bfd_vma gp;
1489 bfd_vma relocation;
1490 unsigned long insn;
1491 unsigned long val;
1493 if (bfd_is_com_section (symbol->section))
1494 relocation = 0;
1495 else
1496 relocation = symbol->value;
1498 relocation += symbol->section->output_section->vma;
1499 relocation += symbol->section->output_offset;
1501 if (reloc_entry->address > input_section->_cooked_size)
1502 return bfd_reloc_outofrange;
1504 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1506 /* Set val to the offset into the section or symbol. */
1507 if (reloc_entry->howto->src_mask == 0)
1509 /* This case occurs with the 64-bit MIPS ELF ABI. */
1510 val = reloc_entry->addend;
1512 else
1514 val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff;
1515 if (val & 0x8000)
1516 val -= 0x10000;
1519 /* Adjust val for the final section location and GP value. If we
1520 are producing relocateable output, we don't want to do this for
1521 an external symbol. */
1522 if (! relocateable
1523 || (symbol->flags & BSF_SECTION_SYM) != 0)
1524 val += relocation - gp;
1526 insn = (insn &~ 0xffff) | (val & 0xffff);
1527 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
1529 if (relocateable)
1530 reloc_entry->address += input_section->output_offset;
1532 /* Make sure it fit in 16 bits. */
1533 if ((long) val >= 0x8000 || (long) val < -0x8000)
1534 return bfd_reloc_overflow;
1536 return bfd_reloc_ok;
1539 /* Do a R_MIPS_GPREL32 relocation. Is this 32 bit value the offset
1540 from the gp register? XXX */
1542 static bfd_reloc_status_type gprel32_with_gp PARAMS ((bfd *, asymbol *,
1543 arelent *, asection *,
1544 boolean, PTR, bfd_vma));
1546 bfd_reloc_status_type
1547 _bfd_mips_elf_gprel32_reloc (abfd,
1548 reloc_entry,
1549 symbol,
1550 data,
1551 input_section,
1552 output_bfd,
1553 error_message)
1554 bfd *abfd;
1555 arelent *reloc_entry;
1556 asymbol *symbol;
1557 PTR data;
1558 asection *input_section;
1559 bfd *output_bfd;
1560 char **error_message;
1562 boolean relocateable;
1563 bfd_reloc_status_type ret;
1564 bfd_vma gp;
1566 /* If we're relocating, and this is an external symbol with no
1567 addend, we don't want to change anything. We will only have an
1568 addend if this is a newly created reloc, not read from an ELF
1569 file. */
1570 if (output_bfd != (bfd *) NULL
1571 && (symbol->flags & BSF_SECTION_SYM) == 0
1572 && reloc_entry->addend == 0)
1574 *error_message = (char *)
1575 _("32bits gp relative relocation occurs for an external symbol");
1576 return bfd_reloc_outofrange;
1579 if (output_bfd != (bfd *) NULL)
1581 relocateable = true;
1582 gp = _bfd_get_gp_value (output_bfd);
1584 else
1586 relocateable = false;
1587 output_bfd = symbol->section->output_section->owner;
1589 ret = mips_elf_final_gp (output_bfd, symbol, relocateable,
1590 error_message, &gp);
1591 if (ret != bfd_reloc_ok)
1592 return ret;
1595 return gprel32_with_gp (abfd, symbol, reloc_entry, input_section,
1596 relocateable, data, gp);
1599 static bfd_reloc_status_type
1600 gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data,
1602 bfd *abfd;
1603 asymbol *symbol;
1604 arelent *reloc_entry;
1605 asection *input_section;
1606 boolean relocateable;
1607 PTR data;
1608 bfd_vma gp;
1610 bfd_vma relocation;
1611 unsigned long val;
1613 if (bfd_is_com_section (symbol->section))
1614 relocation = 0;
1615 else
1616 relocation = symbol->value;
1618 relocation += symbol->section->output_section->vma;
1619 relocation += symbol->section->output_offset;
1621 if (reloc_entry->address > input_section->_cooked_size)
1622 return bfd_reloc_outofrange;
1624 if (reloc_entry->howto->src_mask == 0)
1626 /* This case arises with the 64-bit MIPS ELF ABI. */
1627 val = 0;
1629 else
1630 val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1632 /* Set val to the offset into the section or symbol. */
1633 val += reloc_entry->addend;
1635 /* Adjust val for the final section location and GP value. If we
1636 are producing relocateable output, we don't want to do this for
1637 an external symbol. */
1638 if (! relocateable
1639 || (symbol->flags & BSF_SECTION_SYM) != 0)
1640 val += relocation - gp;
1642 bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address);
1644 if (relocateable)
1645 reloc_entry->address += input_section->output_offset;
1647 return bfd_reloc_ok;
1650 /* Handle a 64 bit reloc in a 32 bit MIPS ELF file. These are
1651 generated when addreses are 64 bits. The upper 32 bits are a simle
1652 sign extension. */
1654 static bfd_reloc_status_type
1655 mips32_64bit_reloc (abfd, reloc_entry, symbol, data, input_section,
1656 output_bfd, error_message)
1657 bfd *abfd;
1658 arelent *reloc_entry;
1659 asymbol *symbol;
1660 PTR data;
1661 asection *input_section;
1662 bfd *output_bfd;
1663 char **error_message;
1665 bfd_reloc_status_type r;
1666 arelent reloc32;
1667 unsigned long val;
1668 bfd_size_type addr;
1670 r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1671 input_section, output_bfd, error_message);
1672 if (r != bfd_reloc_continue)
1673 return r;
1675 /* Do a normal 32 bit relocation on the lower 32 bits. */
1676 reloc32 = *reloc_entry;
1677 if (bfd_big_endian (abfd))
1678 reloc32.address += 4;
1679 reloc32.howto = &elf_mips_howto_table[R_MIPS_32];
1680 r = bfd_perform_relocation (abfd, &reloc32, data, input_section,
1681 output_bfd, error_message);
1683 /* Sign extend into the upper 32 bits. */
1684 val = bfd_get_32 (abfd, (bfd_byte *) data + reloc32.address);
1685 if ((val & 0x80000000) != 0)
1686 val = 0xffffffff;
1687 else
1688 val = 0;
1689 addr = reloc_entry->address;
1690 if (bfd_little_endian (abfd))
1691 addr += 4;
1692 bfd_put_32 (abfd, val, (bfd_byte *) data + addr);
1694 return r;
1697 /* Handle a mips16 jump. */
1699 static bfd_reloc_status_type
1700 mips16_jump_reloc (abfd, reloc_entry, symbol, data, input_section,
1701 output_bfd, error_message)
1702 bfd *abfd ATTRIBUTE_UNUSED;
1703 arelent *reloc_entry;
1704 asymbol *symbol;
1705 PTR data ATTRIBUTE_UNUSED;
1706 asection *input_section;
1707 bfd *output_bfd;
1708 char **error_message ATTRIBUTE_UNUSED;
1710 if (output_bfd != (bfd *) NULL
1711 && (symbol->flags & BSF_SECTION_SYM) == 0
1712 && reloc_entry->addend == 0)
1714 reloc_entry->address += input_section->output_offset;
1715 return bfd_reloc_ok;
1718 /* FIXME. */
1720 static boolean warned;
1722 if (! warned)
1723 (*_bfd_error_handler)
1724 (_("Linking mips16 objects into %s format is not supported"),
1725 bfd_get_target (input_section->output_section->owner));
1726 warned = true;
1729 return bfd_reloc_undefined;
1732 /* Handle a mips16 GP relative reloc. */
1734 static bfd_reloc_status_type
1735 mips16_gprel_reloc (abfd, reloc_entry, symbol, data, input_section,
1736 output_bfd, error_message)
1737 bfd *abfd;
1738 arelent *reloc_entry;
1739 asymbol *symbol;
1740 PTR data;
1741 asection *input_section;
1742 bfd *output_bfd;
1743 char **error_message;
1745 boolean relocateable;
1746 bfd_reloc_status_type ret;
1747 bfd_vma gp;
1748 unsigned short extend, insn;
1749 unsigned long final;
1751 /* If we're relocating, and this is an external symbol with no
1752 addend, we don't want to change anything. We will only have an
1753 addend if this is a newly created reloc, not read from an ELF
1754 file. */
1755 if (output_bfd != NULL
1756 && (symbol->flags & BSF_SECTION_SYM) == 0
1757 && reloc_entry->addend == 0)
1759 reloc_entry->address += input_section->output_offset;
1760 return bfd_reloc_ok;
1763 if (output_bfd != NULL)
1764 relocateable = true;
1765 else
1767 relocateable = false;
1768 output_bfd = symbol->section->output_section->owner;
1771 ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
1772 &gp);
1773 if (ret != bfd_reloc_ok)
1774 return ret;
1776 if (reloc_entry->address > input_section->_cooked_size)
1777 return bfd_reloc_outofrange;
1779 /* Pick up the mips16 extend instruction and the real instruction. */
1780 extend = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address);
1781 insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address + 2);
1783 /* Stuff the current addend back as a 32 bit value, do the usual
1784 relocation, and then clean up. */
1785 bfd_put_32 (abfd,
1786 (((extend & 0x1f) << 11)
1787 | (extend & 0x7e0)
1788 | (insn & 0x1f)),
1789 (bfd_byte *) data + reloc_entry->address);
1791 ret = gprel16_with_gp (abfd, symbol, reloc_entry, input_section,
1792 relocateable, data, gp);
1794 final = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1795 bfd_put_16 (abfd,
1796 ((extend & 0xf800)
1797 | ((final >> 11) & 0x1f)
1798 | (final & 0x7e0)),
1799 (bfd_byte *) data + reloc_entry->address);
1800 bfd_put_16 (abfd,
1801 ((insn & 0xffe0)
1802 | (final & 0x1f)),
1803 (bfd_byte *) data + reloc_entry->address + 2);
1805 return ret;
1808 /* Return the ISA for a MIPS e_flags value. */
1810 static INLINE int
1811 elf_mips_isa (flags)
1812 flagword flags;
1814 switch (flags & EF_MIPS_ARCH)
1816 case E_MIPS_ARCH_1:
1817 return 1;
1818 case E_MIPS_ARCH_2:
1819 return 2;
1820 case E_MIPS_ARCH_3:
1821 return 3;
1822 case E_MIPS_ARCH_4:
1823 return 4;
1825 return 4;
1828 /* Return the MACH for a MIPS e_flags value. */
1830 static INLINE int
1831 elf_mips_mach (flags)
1832 flagword flags;
1834 switch (flags & EF_MIPS_MACH)
1836 case E_MIPS_MACH_3900:
1837 return bfd_mach_mips3900;
1839 case E_MIPS_MACH_4010:
1840 return bfd_mach_mips4010;
1842 case E_MIPS_MACH_4100:
1843 return bfd_mach_mips4100;
1845 case E_MIPS_MACH_4111:
1846 return bfd_mach_mips4111;
1848 case E_MIPS_MACH_4650:
1849 return bfd_mach_mips4650;
1851 default:
1852 switch (flags & EF_MIPS_ARCH)
1854 default:
1855 case E_MIPS_ARCH_1:
1856 return bfd_mach_mips3000;
1857 break;
1859 case E_MIPS_ARCH_2:
1860 return bfd_mach_mips6000;
1861 break;
1863 case E_MIPS_ARCH_3:
1864 return bfd_mach_mips4000;
1865 break;
1867 case E_MIPS_ARCH_4:
1868 return bfd_mach_mips8000;
1869 break;
1873 return 0;
1876 /* Return printable name for ABI. */
1878 static INLINE char*
1879 elf_mips_abi_name (abfd)
1880 bfd *abfd;
1882 flagword flags;
1884 if (ABI_N32_P (abfd))
1885 return "N32";
1886 else if (ABI_64_P (abfd))
1887 return "64";
1889 flags = elf_elfheader (abfd)->e_flags;
1890 switch (flags & EF_MIPS_ABI)
1892 case 0:
1893 return "none";
1894 case E_MIPS_ABI_O32:
1895 return "O32";
1896 case E_MIPS_ABI_O64:
1897 return "O64";
1898 case E_MIPS_ABI_EABI32:
1899 return "EABI32";
1900 case E_MIPS_ABI_EABI64:
1901 return "EABI64";
1902 default:
1903 return "unknown abi";
1907 /* A mapping from BFD reloc types to MIPS ELF reloc types. */
1909 struct elf_reloc_map {
1910 bfd_reloc_code_real_type bfd_reloc_val;
1911 enum elf_mips_reloc_type elf_reloc_val;
1914 static CONST struct elf_reloc_map mips_reloc_map[] =
1916 { BFD_RELOC_NONE, R_MIPS_NONE, },
1917 { BFD_RELOC_16, R_MIPS_16 },
1918 { BFD_RELOC_32, R_MIPS_32 },
1919 { BFD_RELOC_64, R_MIPS_64 },
1920 { BFD_RELOC_MIPS_JMP, R_MIPS_26 },
1921 { BFD_RELOC_HI16_S, R_MIPS_HI16 },
1922 { BFD_RELOC_LO16, R_MIPS_LO16 },
1923 { BFD_RELOC_MIPS_GPREL, R_MIPS_GPREL16 },
1924 { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL },
1925 { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 },
1926 { BFD_RELOC_16_PCREL, R_MIPS_PC16 },
1927 { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 },
1928 { BFD_RELOC_MIPS_GPREL32, R_MIPS_GPREL32 },
1929 { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 },
1930 { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 },
1931 { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 },
1932 { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 },
1933 { BFD_RELOC_MIPS_SUB, R_MIPS_SUB },
1934 { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE },
1935 { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST },
1936 { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP }
1939 /* Given a BFD reloc type, return a howto structure. */
1941 static reloc_howto_type *
1942 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
1943 bfd *abfd;
1944 bfd_reloc_code_real_type code;
1946 unsigned int i;
1948 for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); i++)
1950 if (mips_reloc_map[i].bfd_reloc_val == code)
1951 return &elf_mips_howto_table[(int) mips_reloc_map[i].elf_reloc_val];
1954 switch (code)
1956 default:
1957 bfd_set_error (bfd_error_bad_value);
1958 return NULL;
1960 case BFD_RELOC_CTOR:
1961 /* We need to handle BFD_RELOC_CTOR specially.
1962 Select the right relocation (R_MIPS_32 or R_MIPS_64) based on the
1963 size of addresses on this architecture. */
1964 if (bfd_arch_bits_per_address (abfd) == 32)
1965 return &elf_mips_howto_table[(int) R_MIPS_32];
1966 else
1967 return &elf_mips_ctor64_howto;
1969 case BFD_RELOC_MIPS16_JMP:
1970 return &elf_mips16_jump_howto;
1971 case BFD_RELOC_MIPS16_GPREL:
1972 return &elf_mips16_gprel_howto;
1973 case BFD_RELOC_VTABLE_INHERIT:
1974 return &elf_mips_gnu_vtinherit_howto;
1975 case BFD_RELOC_VTABLE_ENTRY:
1976 return &elf_mips_gnu_vtentry_howto;
1977 case BFD_RELOC_PCREL_HI16_S:
1978 return &elf_mips_gnu_rel_hi16;
1979 case BFD_RELOC_PCREL_LO16:
1980 return &elf_mips_gnu_rel_lo16;
1981 case BFD_RELOC_16_PCREL_S2:
1982 return &elf_mips_gnu_rel16_s2;
1983 case BFD_RELOC_64_PCREL:
1984 return &elf_mips_gnu_pcrel64;
1985 case BFD_RELOC_32_PCREL:
1986 return &elf_mips_gnu_pcrel32;
1990 /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */
1992 static reloc_howto_type *
1993 mips_rtype_to_howto (r_type)
1994 unsigned int r_type;
1996 switch (r_type)
1998 case R_MIPS16_26:
1999 return &elf_mips16_jump_howto;
2000 break;
2001 case R_MIPS16_GPREL:
2002 return &elf_mips16_gprel_howto;
2003 break;
2004 case R_MIPS_GNU_VTINHERIT:
2005 return &elf_mips_gnu_vtinherit_howto;
2006 break;
2007 case R_MIPS_GNU_VTENTRY:
2008 return &elf_mips_gnu_vtentry_howto;
2009 break;
2010 case R_MIPS_GNU_REL_HI16:
2011 return &elf_mips_gnu_rel_hi16;
2012 break;
2013 case R_MIPS_GNU_REL_LO16:
2014 return &elf_mips_gnu_rel_lo16;
2015 break;
2016 case R_MIPS_GNU_REL16_S2:
2017 return &elf_mips_gnu_rel16_s2;
2018 break;
2019 case R_MIPS_PC64:
2020 return &elf_mips_gnu_pcrel64;
2021 break;
2022 case R_MIPS_PC32:
2023 return &elf_mips_gnu_pcrel32;
2024 break;
2026 default:
2027 BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
2028 return &elf_mips_howto_table[r_type];
2029 break;
2033 /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */
2035 static void
2036 mips_info_to_howto_rel (abfd, cache_ptr, dst)
2037 bfd *abfd;
2038 arelent *cache_ptr;
2039 Elf32_Internal_Rel *dst;
2041 unsigned int r_type;
2043 r_type = ELF32_R_TYPE (dst->r_info);
2044 cache_ptr->howto = mips_rtype_to_howto (r_type);
2046 /* The addend for a GPREL16 or LITERAL relocation comes from the GP
2047 value for the object file. We get the addend now, rather than
2048 when we do the relocation, because the symbol manipulations done
2049 by the linker may cause us to lose track of the input BFD. */
2050 if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0
2051 && (r_type == (unsigned int) R_MIPS_GPREL16
2052 || r_type == (unsigned int) R_MIPS_LITERAL))
2053 cache_ptr->addend = elf_gp (abfd);
2056 /* Given a MIPS Elf32_Internal_Rela, fill in an arelent structure. */
2058 static void
2059 mips_info_to_howto_rela (abfd, cache_ptr, dst)
2060 bfd *abfd;
2061 arelent *cache_ptr;
2062 Elf32_Internal_Rela *dst;
2064 /* Since an Elf32_Internal_Rel is an initial prefix of an
2065 Elf32_Internal_Rela, we can just use mips_info_to_howto_rel
2066 above. */
2067 mips_info_to_howto_rel (abfd, cache_ptr, (Elf32_Internal_Rel *) dst);
2069 /* If we ever need to do any extra processing with dst->r_addend
2070 (the field omitted in an Elf32_Internal_Rel) we can do it here. */
2073 /* A .reginfo section holds a single Elf32_RegInfo structure. These
2074 routines swap this structure in and out. They are used outside of
2075 BFD, so they are globally visible. */
2077 void
2078 bfd_mips_elf32_swap_reginfo_in (abfd, ex, in)
2079 bfd *abfd;
2080 const Elf32_External_RegInfo *ex;
2081 Elf32_RegInfo *in;
2083 in->ri_gprmask = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gprmask);
2084 in->ri_cprmask[0] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[0]);
2085 in->ri_cprmask[1] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[1]);
2086 in->ri_cprmask[2] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[2]);
2087 in->ri_cprmask[3] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[3]);
2088 in->ri_gp_value = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gp_value);
2091 void
2092 bfd_mips_elf32_swap_reginfo_out (abfd, in, ex)
2093 bfd *abfd;
2094 const Elf32_RegInfo *in;
2095 Elf32_External_RegInfo *ex;
2097 bfd_h_put_32 (abfd, (bfd_vma) in->ri_gprmask,
2098 (bfd_byte *) ex->ri_gprmask);
2099 bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[0],
2100 (bfd_byte *) ex->ri_cprmask[0]);
2101 bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[1],
2102 (bfd_byte *) ex->ri_cprmask[1]);
2103 bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[2],
2104 (bfd_byte *) ex->ri_cprmask[2]);
2105 bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[3],
2106 (bfd_byte *) ex->ri_cprmask[3]);
2107 bfd_h_put_32 (abfd, (bfd_vma) in->ri_gp_value,
2108 (bfd_byte *) ex->ri_gp_value);
2111 /* In the 64 bit ABI, the .MIPS.options section holds register
2112 information in an Elf64_Reginfo structure. These routines swap
2113 them in and out. They are globally visible because they are used
2114 outside of BFD. These routines are here so that gas can call them
2115 without worrying about whether the 64 bit ABI has been included. */
2117 void
2118 bfd_mips_elf64_swap_reginfo_in (abfd, ex, in)
2119 bfd *abfd;
2120 const Elf64_External_RegInfo *ex;
2121 Elf64_Internal_RegInfo *in;
2123 in->ri_gprmask = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gprmask);
2124 in->ri_pad = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_pad);
2125 in->ri_cprmask[0] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[0]);
2126 in->ri_cprmask[1] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[1]);
2127 in->ri_cprmask[2] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[2]);
2128 in->ri_cprmask[3] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[3]);
2129 in->ri_gp_value = bfd_h_get_64 (abfd, (bfd_byte *) ex->ri_gp_value);
2132 void
2133 bfd_mips_elf64_swap_reginfo_out (abfd, in, ex)
2134 bfd *abfd;
2135 const Elf64_Internal_RegInfo *in;
2136 Elf64_External_RegInfo *ex;
2138 bfd_h_put_32 (abfd, (bfd_vma) in->ri_gprmask,
2139 (bfd_byte *) ex->ri_gprmask);
2140 bfd_h_put_32 (abfd, (bfd_vma) in->ri_pad,
2141 (bfd_byte *) ex->ri_pad);
2142 bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[0],
2143 (bfd_byte *) ex->ri_cprmask[0]);
2144 bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[1],
2145 (bfd_byte *) ex->ri_cprmask[1]);
2146 bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[2],
2147 (bfd_byte *) ex->ri_cprmask[2]);
2148 bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[3],
2149 (bfd_byte *) ex->ri_cprmask[3]);
2150 bfd_h_put_64 (abfd, (bfd_vma) in->ri_gp_value,
2151 (bfd_byte *) ex->ri_gp_value);
2154 /* Swap an entry in a .gptab section. Note that these routines rely
2155 on the equivalence of the two elements of the union. */
2157 static void
2158 bfd_mips_elf32_swap_gptab_in (abfd, ex, in)
2159 bfd *abfd;
2160 const Elf32_External_gptab *ex;
2161 Elf32_gptab *in;
2163 in->gt_entry.gt_g_value = bfd_h_get_32 (abfd, ex->gt_entry.gt_g_value);
2164 in->gt_entry.gt_bytes = bfd_h_get_32 (abfd, ex->gt_entry.gt_bytes);
2167 static void
2168 bfd_mips_elf32_swap_gptab_out (abfd, in, ex)
2169 bfd *abfd;
2170 const Elf32_gptab *in;
2171 Elf32_External_gptab *ex;
2173 bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_g_value,
2174 ex->gt_entry.gt_g_value);
2175 bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_bytes,
2176 ex->gt_entry.gt_bytes);
2179 static void
2180 bfd_elf32_swap_compact_rel_out (abfd, in, ex)
2181 bfd *abfd;
2182 const Elf32_compact_rel *in;
2183 Elf32_External_compact_rel *ex;
2185 bfd_h_put_32 (abfd, (bfd_vma) in->id1, ex->id1);
2186 bfd_h_put_32 (abfd, (bfd_vma) in->num, ex->num);
2187 bfd_h_put_32 (abfd, (bfd_vma) in->id2, ex->id2);
2188 bfd_h_put_32 (abfd, (bfd_vma) in->offset, ex->offset);
2189 bfd_h_put_32 (abfd, (bfd_vma) in->reserved0, ex->reserved0);
2190 bfd_h_put_32 (abfd, (bfd_vma) in->reserved1, ex->reserved1);
2193 static void
2194 bfd_elf32_swap_crinfo_out (abfd, in, ex)
2195 bfd *abfd;
2196 const Elf32_crinfo *in;
2197 Elf32_External_crinfo *ex;
2199 unsigned long l;
2201 l = (((in->ctype & CRINFO_CTYPE) << CRINFO_CTYPE_SH)
2202 | ((in->rtype & CRINFO_RTYPE) << CRINFO_RTYPE_SH)
2203 | ((in->dist2to & CRINFO_DIST2TO) << CRINFO_DIST2TO_SH)
2204 | ((in->relvaddr & CRINFO_RELVADDR) << CRINFO_RELVADDR_SH));
2205 bfd_h_put_32 (abfd, (bfd_vma) l, ex->info);
2206 bfd_h_put_32 (abfd, (bfd_vma) in->konst, ex->konst);
2207 bfd_h_put_32 (abfd, (bfd_vma) in->vaddr, ex->vaddr);
2210 /* Swap in an options header. */
2212 void
2213 bfd_mips_elf_swap_options_in (abfd, ex, in)
2214 bfd *abfd;
2215 const Elf_External_Options *ex;
2216 Elf_Internal_Options *in;
2218 in->kind = bfd_h_get_8 (abfd, ex->kind);
2219 in->size = bfd_h_get_8 (abfd, ex->size);
2220 in->section = bfd_h_get_16 (abfd, ex->section);
2221 in->info = bfd_h_get_32 (abfd, ex->info);
2224 /* Swap out an options header. */
2226 void
2227 bfd_mips_elf_swap_options_out (abfd, in, ex)
2228 bfd *abfd;
2229 const Elf_Internal_Options *in;
2230 Elf_External_Options *ex;
2232 bfd_h_put_8 (abfd, in->kind, ex->kind);
2233 bfd_h_put_8 (abfd, in->size, ex->size);
2234 bfd_h_put_16 (abfd, in->section, ex->section);
2235 bfd_h_put_32 (abfd, in->info, ex->info);
2237 #if 0
2238 /* Swap in an MSYM entry. */
2240 static void
2241 bfd_mips_elf_swap_msym_in (abfd, ex, in)
2242 bfd *abfd;
2243 const Elf32_External_Msym *ex;
2244 Elf32_Internal_Msym *in;
2246 in->ms_hash_value = bfd_h_get_32 (abfd, ex->ms_hash_value);
2247 in->ms_info = bfd_h_get_32 (abfd, ex->ms_info);
2249 #endif
2250 /* Swap out an MSYM entry. */
2252 static void
2253 bfd_mips_elf_swap_msym_out (abfd, in, ex)
2254 bfd *abfd;
2255 const Elf32_Internal_Msym *in;
2256 Elf32_External_Msym *ex;
2258 bfd_h_put_32 (abfd, in->ms_hash_value, ex->ms_hash_value);
2259 bfd_h_put_32 (abfd, in->ms_info, ex->ms_info);
2263 /* Determine whether a symbol is global for the purposes of splitting
2264 the symbol table into global symbols and local symbols. At least
2265 on Irix 5, this split must be between section symbols and all other
2266 symbols. On most ELF targets the split is between static symbols
2267 and externally visible symbols. */
2269 /*ARGSUSED*/
2270 static boolean
2271 mips_elf_sym_is_global (abfd, sym)
2272 bfd *abfd ATTRIBUTE_UNUSED;
2273 asymbol *sym;
2275 return (sym->flags & BSF_SECTION_SYM) == 0 ? true : false;
2278 /* Set the right machine number for a MIPS ELF file. This is used for
2279 both the 32-bit and the 64-bit ABI. */
2281 boolean
2282 _bfd_mips_elf_object_p (abfd)
2283 bfd *abfd;
2285 /* Irix 5 and 6 is broken. Object file symbol tables are not always
2286 sorted correctly such that local symbols precede global symbols,
2287 and the sh_info field in the symbol table is not always right. */
2288 elf_bad_symtab (abfd) = true;
2290 bfd_default_set_arch_mach (abfd, bfd_arch_mips,
2291 elf_mips_mach (elf_elfheader (abfd)->e_flags));
2292 return true;
2295 /* The final processing done just before writing out a MIPS ELF object
2296 file. This gets the MIPS architecture right based on the machine
2297 number. This is used by both the 32-bit and the 64-bit ABI. */
2299 /*ARGSUSED*/
2300 void
2301 _bfd_mips_elf_final_write_processing (abfd, linker)
2302 bfd *abfd;
2303 boolean linker ATTRIBUTE_UNUSED;
2305 unsigned long val;
2306 unsigned int i;
2307 Elf_Internal_Shdr **hdrpp;
2308 const char *name;
2309 asection *sec;
2311 switch (bfd_get_mach (abfd))
2313 default:
2314 case bfd_mach_mips3000:
2315 val = E_MIPS_ARCH_1;
2316 break;
2318 case bfd_mach_mips3900:
2319 val = E_MIPS_ARCH_1 | E_MIPS_MACH_3900;
2320 break;
2322 case bfd_mach_mips6000:
2323 val = E_MIPS_ARCH_2;
2324 break;
2326 case bfd_mach_mips4000:
2327 case bfd_mach_mips4300:
2328 val = E_MIPS_ARCH_3;
2329 break;
2331 case bfd_mach_mips4010:
2332 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4010;
2333 break;
2335 case bfd_mach_mips4100:
2336 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4100;
2337 break;
2339 case bfd_mach_mips4111:
2340 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4111;
2341 break;
2343 case bfd_mach_mips4650:
2344 val = E_MIPS_ARCH_3 | E_MIPS_MACH_4650;
2345 break;
2347 case bfd_mach_mips8000:
2348 val = E_MIPS_ARCH_4;
2349 break;
2352 elf_elfheader (abfd)->e_flags &= ~ (EF_MIPS_ARCH | EF_MIPS_MACH);
2353 elf_elfheader (abfd)->e_flags |= val;
2355 /* Set the sh_info field for .gptab sections and other appropriate
2356 info for each special section. */
2357 for (i = 1, hdrpp = elf_elfsections (abfd) + 1;
2358 i < elf_elfheader (abfd)->e_shnum;
2359 i++, hdrpp++)
2361 switch ((*hdrpp)->sh_type)
2363 case SHT_MIPS_MSYM:
2364 case SHT_MIPS_LIBLIST:
2365 sec = bfd_get_section_by_name (abfd, ".dynstr");
2366 if (sec != NULL)
2367 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
2368 break;
2370 case SHT_MIPS_GPTAB:
2371 BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
2372 name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
2373 BFD_ASSERT (name != NULL
2374 && strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0);
2375 sec = bfd_get_section_by_name (abfd, name + sizeof ".gptab" - 1);
2376 BFD_ASSERT (sec != NULL);
2377 (*hdrpp)->sh_info = elf_section_data (sec)->this_idx;
2378 break;
2380 case SHT_MIPS_CONTENT:
2381 BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
2382 name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
2383 BFD_ASSERT (name != NULL
2384 && strncmp (name, ".MIPS.content",
2385 sizeof ".MIPS.content" - 1) == 0);
2386 sec = bfd_get_section_by_name (abfd,
2387 name + sizeof ".MIPS.content" - 1);
2388 BFD_ASSERT (sec != NULL);
2389 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
2390 break;
2392 case SHT_MIPS_SYMBOL_LIB:
2393 sec = bfd_get_section_by_name (abfd, ".dynsym");
2394 if (sec != NULL)
2395 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
2396 sec = bfd_get_section_by_name (abfd, ".liblist");
2397 if (sec != NULL)
2398 (*hdrpp)->sh_info = elf_section_data (sec)->this_idx;
2399 break;
2401 case SHT_MIPS_EVENTS:
2402 BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
2403 name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
2404 BFD_ASSERT (name != NULL);
2405 if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) == 0)
2406 sec = bfd_get_section_by_name (abfd,
2407 name + sizeof ".MIPS.events" - 1);
2408 else
2410 BFD_ASSERT (strncmp (name, ".MIPS.post_rel",
2411 sizeof ".MIPS.post_rel" - 1) == 0);
2412 sec = bfd_get_section_by_name (abfd,
2413 (name
2414 + sizeof ".MIPS.post_rel" - 1));
2416 BFD_ASSERT (sec != NULL);
2417 (*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
2418 break;
2424 /* Function to keep MIPS specific file flags like as EF_MIPS_PIC. */
2426 boolean
2427 _bfd_mips_elf_set_private_flags (abfd, flags)
2428 bfd *abfd;
2429 flagword flags;
2431 BFD_ASSERT (!elf_flags_init (abfd)
2432 || elf_elfheader (abfd)->e_flags == flags);
2434 elf_elfheader (abfd)->e_flags = flags;
2435 elf_flags_init (abfd) = true;
2436 return true;
2439 /* Copy backend specific data from one object module to another */
2441 boolean
2442 _bfd_mips_elf_copy_private_bfd_data (ibfd, obfd)
2443 bfd *ibfd;
2444 bfd *obfd;
2446 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2447 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2448 return true;
2450 BFD_ASSERT (!elf_flags_init (obfd)
2451 || (elf_elfheader (obfd)->e_flags
2452 == elf_elfheader (ibfd)->e_flags));
2454 elf_gp (obfd) = elf_gp (ibfd);
2455 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
2456 elf_flags_init (obfd) = true;
2457 return true;
2460 /* Merge backend specific data from an object file to the output
2461 object file when linking. */
2463 boolean
2464 _bfd_mips_elf_merge_private_bfd_data (ibfd, obfd)
2465 bfd *ibfd;
2466 bfd *obfd;
2468 flagword old_flags;
2469 flagword new_flags;
2470 boolean ok;
2472 /* Check if we have the same endianess */
2473 if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
2474 return false;
2476 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2477 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2478 return true;
2480 new_flags = elf_elfheader (ibfd)->e_flags;
2481 elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_NOREORDER;
2482 old_flags = elf_elfheader (obfd)->e_flags;
2484 if (! elf_flags_init (obfd))
2486 elf_flags_init (obfd) = true;
2487 elf_elfheader (obfd)->e_flags = new_flags;
2488 elf_elfheader (obfd)->e_ident[EI_CLASS]
2489 = elf_elfheader (ibfd)->e_ident[EI_CLASS];
2491 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
2492 && bfd_get_arch_info (obfd)->the_default)
2494 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
2495 bfd_get_mach (ibfd)))
2496 return false;
2499 return true;
2502 /* Check flag compatibility. */
2504 new_flags &= ~EF_MIPS_NOREORDER;
2505 old_flags &= ~EF_MIPS_NOREORDER;
2507 if (new_flags == old_flags)
2508 return true;
2510 ok = true;
2512 if ((new_flags & EF_MIPS_PIC) != (old_flags & EF_MIPS_PIC))
2514 new_flags &= ~EF_MIPS_PIC;
2515 old_flags &= ~EF_MIPS_PIC;
2516 (*_bfd_error_handler)
2517 (_("%s: linking PIC files with non-PIC files"),
2518 bfd_get_filename (ibfd));
2519 ok = false;
2522 if ((new_flags & EF_MIPS_CPIC) != (old_flags & EF_MIPS_CPIC))
2524 new_flags &= ~EF_MIPS_CPIC;
2525 old_flags &= ~EF_MIPS_CPIC;
2526 (*_bfd_error_handler)
2527 (_("%s: linking abicalls files with non-abicalls files"),
2528 bfd_get_filename (ibfd));
2529 ok = false;
2532 /* Compare the ISA's. */
2533 if ((new_flags & (EF_MIPS_ARCH | EF_MIPS_MACH))
2534 != (old_flags & (EF_MIPS_ARCH | EF_MIPS_MACH)))
2536 int new_mach = new_flags & EF_MIPS_MACH;
2537 int old_mach = old_flags & EF_MIPS_MACH;
2538 int new_isa = elf_mips_isa (new_flags);
2539 int old_isa = elf_mips_isa (old_flags);
2541 /* If either has no machine specified, just compare the general isa's.
2542 Some combinations of machines are ok, if the isa's match. */
2543 if (! new_mach
2544 || ! old_mach
2545 || new_mach == old_mach
2548 /* Don't warn about mixing -mips1 and -mips2 code, or mixing -mips3
2549 and -mips4 code. They will normally use the same data sizes and
2550 calling conventions. */
2552 if ((new_isa == 1 || new_isa == 2)
2553 ? (old_isa != 1 && old_isa != 2)
2554 : (old_isa == 1 || old_isa == 2))
2556 (*_bfd_error_handler)
2557 (_("%s: ISA mismatch (-mips%d) with previous modules (-mips%d)"),
2558 bfd_get_filename (ibfd), new_isa, old_isa);
2559 ok = false;
2563 else
2565 (*_bfd_error_handler)
2566 (_("%s: ISA mismatch (%d) with previous modules (%d)"),
2567 bfd_get_filename (ibfd),
2568 elf_mips_mach (new_flags),
2569 elf_mips_mach (old_flags));
2570 ok = false;
2573 new_flags &= ~ (EF_MIPS_ARCH | EF_MIPS_MACH);
2574 old_flags &= ~ (EF_MIPS_ARCH | EF_MIPS_MACH);
2577 /* Compare ABI's. The 64-bit ABI does not use EF_MIPS_ABI. But, it
2578 does set EI_CLASS differently from any 32-bit ABI. */
2579 if ((new_flags & EF_MIPS_ABI) != (old_flags & EF_MIPS_ABI)
2580 || (elf_elfheader (ibfd)->e_ident[EI_CLASS]
2581 != elf_elfheader (obfd)->e_ident[EI_CLASS]))
2583 /* Only error if both are set (to different values). */
2584 if (((new_flags & EF_MIPS_ABI) && (old_flags & EF_MIPS_ABI))
2585 || (elf_elfheader (ibfd)->e_ident[EI_CLASS]
2586 != elf_elfheader (obfd)->e_ident[EI_CLASS]))
2588 (*_bfd_error_handler)
2589 (_("%s: ABI mismatch: linking %s module with previous %s modules"),
2590 bfd_get_filename (ibfd),
2591 elf_mips_abi_name (ibfd),
2592 elf_mips_abi_name (obfd));
2593 ok = false;
2595 new_flags &= ~EF_MIPS_ABI;
2596 old_flags &= ~EF_MIPS_ABI;
2599 /* Warn about any other mismatches */
2600 if (new_flags != old_flags)
2602 (*_bfd_error_handler)
2603 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
2604 bfd_get_filename (ibfd), (unsigned long) new_flags,
2605 (unsigned long) old_flags);
2606 ok = false;
2609 if (! ok)
2611 bfd_set_error (bfd_error_bad_value);
2612 return false;
2615 return true;
2618 boolean
2619 _bfd_mips_elf_print_private_bfd_data (abfd, ptr)
2620 bfd *abfd;
2621 PTR ptr;
2623 FILE *file = (FILE *) ptr;
2625 BFD_ASSERT (abfd != NULL && ptr != NULL);
2627 /* Print normal ELF private data. */
2628 _bfd_elf_print_private_bfd_data (abfd, ptr);
2630 /* xgettext:c-format */
2631 fprintf (file, _ ("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
2633 if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O32)
2634 fprintf (file, _ (" [abi=O32]"));
2635 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_O64)
2636 fprintf (file, _ (" [abi=O64]"));
2637 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI32)
2638 fprintf (file, _ (" [abi=EABI32]"));
2639 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI) == E_MIPS_ABI_EABI64)
2640 fprintf (file, _ (" [abi=EABI64]"));
2641 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI))
2642 fprintf (file, _ (" [abi unknown]"));
2643 else if (ABI_N32_P (abfd))
2644 fprintf (file, _ (" [abi=N32]"));
2645 else if (ABI_64_P (abfd))
2646 fprintf (file, _ (" [abi=64]"));
2647 else
2648 fprintf (file, _ (" [no abi set]"));
2650 if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_1)
2651 fprintf (file, _ (" [mips1]"));
2652 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_2)
2653 fprintf (file, _ (" [mips2]"));
2654 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_3)
2655 fprintf (file, _ (" [mips3]"));
2656 else if ((elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_4)
2657 fprintf (file, _ (" [mips4]"));
2658 else
2659 fprintf (file, _ (" [unknown ISA]"));
2661 if (elf_elfheader (abfd)->e_flags & EF_MIPS_32BITMODE)
2662 fprintf (file, _ (" [32bitmode]"));
2663 else
2664 fprintf (file, _ (" [not 32bitmode]"));
2666 fputc ('\n', file);
2668 return true;
2671 /* Handle a MIPS specific section when reading an object file. This
2672 is called when elfcode.h finds a section with an unknown type.
2673 This routine supports both the 32-bit and 64-bit ELF ABI.
2675 FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure
2676 how to. */
2678 boolean
2679 _bfd_mips_elf_section_from_shdr (abfd, hdr, name)
2680 bfd *abfd;
2681 Elf_Internal_Shdr *hdr;
2682 char *name;
2684 flagword flags = 0;
2686 /* There ought to be a place to keep ELF backend specific flags, but
2687 at the moment there isn't one. We just keep track of the
2688 sections by their name, instead. Fortunately, the ABI gives
2689 suggested names for all the MIPS specific sections, so we will
2690 probably get away with this. */
2691 switch (hdr->sh_type)
2693 case SHT_MIPS_LIBLIST:
2694 if (strcmp (name, ".liblist") != 0)
2695 return false;
2696 break;
2697 case SHT_MIPS_MSYM:
2698 if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (abfd)) != 0)
2699 return false;
2700 break;
2701 case SHT_MIPS_CONFLICT:
2702 if (strcmp (name, ".conflict") != 0)
2703 return false;
2704 break;
2705 case SHT_MIPS_GPTAB:
2706 if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) != 0)
2707 return false;
2708 break;
2709 case SHT_MIPS_UCODE:
2710 if (strcmp (name, ".ucode") != 0)
2711 return false;
2712 break;
2713 case SHT_MIPS_DEBUG:
2714 if (strcmp (name, ".mdebug") != 0)
2715 return false;
2716 flags = SEC_DEBUGGING;
2717 break;
2718 case SHT_MIPS_REGINFO:
2719 if (strcmp (name, ".reginfo") != 0
2720 || hdr->sh_size != sizeof (Elf32_External_RegInfo))
2721 return false;
2722 flags = (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_SIZE);
2723 break;
2724 case SHT_MIPS_IFACE:
2725 if (strcmp (name, ".MIPS.interfaces") != 0)
2726 return false;
2727 break;
2728 case SHT_MIPS_CONTENT:
2729 if (strncmp (name, ".MIPS.content", sizeof ".MIPS.content" - 1) != 0)
2730 return false;
2731 break;
2732 case SHT_MIPS_OPTIONS:
2733 if (strcmp (name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) != 0)
2734 return false;
2735 break;
2736 case SHT_MIPS_DWARF:
2737 if (strncmp (name, ".debug_", sizeof ".debug_" - 1) != 0)
2738 return false;
2739 break;
2740 case SHT_MIPS_SYMBOL_LIB:
2741 if (strcmp (name, ".MIPS.symlib") != 0)
2742 return false;
2743 break;
2744 case SHT_MIPS_EVENTS:
2745 if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) != 0
2746 && strncmp (name, ".MIPS.post_rel",
2747 sizeof ".MIPS.post_rel" - 1) != 0)
2748 return false;
2749 break;
2750 default:
2751 return false;
2754 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2755 return false;
2757 if (flags)
2759 if (! bfd_set_section_flags (abfd, hdr->bfd_section,
2760 (bfd_get_section_flags (abfd,
2761 hdr->bfd_section)
2762 | flags)))
2763 return false;
2766 /* FIXME: We should record sh_info for a .gptab section. */
2768 /* For a .reginfo section, set the gp value in the tdata information
2769 from the contents of this section. We need the gp value while
2770 processing relocs, so we just get it now. The .reginfo section
2771 is not used in the 64-bit MIPS ELF ABI. */
2772 if (hdr->sh_type == SHT_MIPS_REGINFO)
2774 Elf32_External_RegInfo ext;
2775 Elf32_RegInfo s;
2777 if (! bfd_get_section_contents (abfd, hdr->bfd_section, (PTR) &ext,
2778 (file_ptr) 0, sizeof ext))
2779 return false;
2780 bfd_mips_elf32_swap_reginfo_in (abfd, &ext, &s);
2781 elf_gp (abfd) = s.ri_gp_value;
2784 /* For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and
2785 set the gp value based on what we find. We may see both
2786 SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case,
2787 they should agree. */
2788 if (hdr->sh_type == SHT_MIPS_OPTIONS)
2790 bfd_byte *contents, *l, *lend;
2792 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
2793 if (contents == NULL)
2794 return false;
2795 if (! bfd_get_section_contents (abfd, hdr->bfd_section, contents,
2796 (file_ptr) 0, hdr->sh_size))
2798 free (contents);
2799 return false;
2801 l = contents;
2802 lend = contents + hdr->sh_size;
2803 while (l + sizeof (Elf_External_Options) <= lend)
2805 Elf_Internal_Options intopt;
2807 bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l,
2808 &intopt);
2809 if (ABI_64_P (abfd) && intopt.kind == ODK_REGINFO)
2811 Elf64_Internal_RegInfo intreg;
2813 bfd_mips_elf64_swap_reginfo_in
2814 (abfd,
2815 ((Elf64_External_RegInfo *)
2816 (l + sizeof (Elf_External_Options))),
2817 &intreg);
2818 elf_gp (abfd) = intreg.ri_gp_value;
2820 else if (intopt.kind == ODK_REGINFO)
2822 Elf32_RegInfo intreg;
2824 bfd_mips_elf32_swap_reginfo_in
2825 (abfd,
2826 ((Elf32_External_RegInfo *)
2827 (l + sizeof (Elf_External_Options))),
2828 &intreg);
2829 elf_gp (abfd) = intreg.ri_gp_value;
2831 l += intopt.size;
2833 free (contents);
2836 return true;
2839 /* Set the correct type for a MIPS ELF section. We do this by the
2840 section name, which is a hack, but ought to work. This routine is
2841 used by both the 32-bit and the 64-bit ABI. */
2843 boolean
2844 _bfd_mips_elf_fake_sections (abfd, hdr, sec)
2845 bfd *abfd;
2846 Elf32_Internal_Shdr *hdr;
2847 asection *sec;
2849 register const char *name;
2851 name = bfd_get_section_name (abfd, sec);
2853 if (strcmp (name, ".liblist") == 0)
2855 hdr->sh_type = SHT_MIPS_LIBLIST;
2856 hdr->sh_info = sec->_raw_size / sizeof (Elf32_Lib);
2857 /* The sh_link field is set in final_write_processing. */
2859 else if (strcmp (name, ".conflict") == 0)
2860 hdr->sh_type = SHT_MIPS_CONFLICT;
2861 else if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0)
2863 hdr->sh_type = SHT_MIPS_GPTAB;
2864 hdr->sh_entsize = sizeof (Elf32_External_gptab);
2865 /* The sh_info field is set in final_write_processing. */
2867 else if (strcmp (name, ".ucode") == 0)
2868 hdr->sh_type = SHT_MIPS_UCODE;
2869 else if (strcmp (name, ".mdebug") == 0)
2871 hdr->sh_type = SHT_MIPS_DEBUG;
2872 /* In a shared object on Irix 5.3, the .mdebug section has an
2873 entsize of 0. FIXME: Does this matter? */
2874 if (SGI_COMPAT (abfd) && (abfd->flags & DYNAMIC) != 0)
2875 hdr->sh_entsize = 0;
2876 else
2877 hdr->sh_entsize = 1;
2879 else if (strcmp (name, ".reginfo") == 0)
2881 hdr->sh_type = SHT_MIPS_REGINFO;
2882 /* In a shared object on Irix 5.3, the .reginfo section has an
2883 entsize of 0x18. FIXME: Does this matter? */
2884 if (SGI_COMPAT (abfd))
2886 if ((abfd->flags & DYNAMIC) != 0)
2887 hdr->sh_entsize = sizeof (Elf32_External_RegInfo);
2888 else
2889 hdr->sh_entsize = 1;
2891 else
2892 hdr->sh_entsize = sizeof (Elf32_External_RegInfo);
2894 else if (SGI_COMPAT (abfd)
2895 && (strcmp (name, ".hash") == 0
2896 || strcmp (name, ".dynamic") == 0
2897 || strcmp (name, ".dynstr") == 0))
2899 if ( SGI_COMPAT(abfd))
2900 hdr->sh_entsize = 0;
2901 #if 0
2902 /* This isn't how the Irix 6 linker behaves. */
2903 hdr->sh_info = SIZEOF_MIPS_DYNSYM_SECNAMES;
2904 #endif
2906 else if (strcmp (name, ".got") == 0
2907 || strcmp (name, MIPS_ELF_SRDATA_SECTION_NAME (abfd)) == 0
2908 || strcmp (name, ".sdata") == 0
2909 || strcmp (name, ".sbss") == 0
2910 || strcmp (name, ".lit4") == 0
2911 || strcmp (name, ".lit8") == 0)
2912 hdr->sh_flags |= SHF_MIPS_GPREL;
2913 else if (strcmp (name, ".MIPS.interfaces") == 0)
2915 hdr->sh_type = SHT_MIPS_IFACE;
2916 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
2918 else if (strncmp (name, ".MIPS.content", strlen (".MIPS.content")) == 0)
2920 hdr->sh_type = SHT_MIPS_CONTENT;
2921 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
2922 /* The sh_info field is set in final_write_processing. */
2924 else if (strcmp (name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0)
2926 hdr->sh_type = SHT_MIPS_OPTIONS;
2927 hdr->sh_entsize = 1;
2928 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
2930 else if (strncmp (name, ".debug_", sizeof ".debug_" - 1) == 0)
2931 hdr->sh_type = SHT_MIPS_DWARF;
2932 else if (strcmp (name, ".MIPS.symlib") == 0)
2934 hdr->sh_type = SHT_MIPS_SYMBOL_LIB;
2935 /* The sh_link and sh_info fields are set in
2936 final_write_processing. */
2938 else if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) == 0
2939 || strncmp (name, ".MIPS.post_rel",
2940 sizeof ".MIPS.post_rel" - 1) == 0)
2942 hdr->sh_type = SHT_MIPS_EVENTS;
2943 hdr->sh_flags |= SHF_MIPS_NOSTRIP;
2944 /* The sh_link field is set in final_write_processing. */
2946 else if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (abfd)) == 0)
2948 hdr->sh_type = SHT_MIPS_MSYM;
2949 hdr->sh_flags |= SHF_ALLOC;
2950 hdr->sh_entsize = 8;
2953 /* The generic elf_fake_sections will set up REL_HDR using the
2954 default kind of relocations. But, we may actually need both
2955 kinds of relocations, so we set up the second header here. */
2956 if ((sec->flags & SEC_RELOC) != 0)
2958 struct bfd_elf_section_data *esd;
2960 esd = elf_section_data (sec);
2961 BFD_ASSERT (esd->rel_hdr2 == NULL);
2962 esd->rel_hdr2
2963 = (Elf_Internal_Shdr *) bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
2964 if (!esd->rel_hdr2)
2965 return false;
2966 _bfd_elf_init_reloc_shdr (abfd, esd->rel_hdr2, sec,
2967 !elf_section_data (sec)->use_rela_p);
2970 return true;
2973 /* Given a BFD section, try to locate the corresponding ELF section
2974 index. This is used by both the 32-bit and the 64-bit ABI.
2975 Actually, it's not clear to me that the 64-bit ABI supports these,
2976 but for non-PIC objects we will certainly want support for at least
2977 the .scommon section. */
2979 boolean
2980 _bfd_mips_elf_section_from_bfd_section (abfd, hdr, sec, retval)
2981 bfd *abfd ATTRIBUTE_UNUSED;
2982 Elf32_Internal_Shdr *hdr ATTRIBUTE_UNUSED;
2983 asection *sec;
2984 int *retval;
2986 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
2988 *retval = SHN_MIPS_SCOMMON;
2989 return true;
2991 if (strcmp (bfd_get_section_name (abfd, sec), ".acommon") == 0)
2993 *retval = SHN_MIPS_ACOMMON;
2994 return true;
2996 return false;
2999 /* When are writing out the .options or .MIPS.options section,
3000 remember the bytes we are writing out, so that we can install the
3001 GP value in the section_processing routine. */
3003 boolean
3004 _bfd_mips_elf_set_section_contents (abfd, section, location, offset, count)
3005 bfd *abfd;
3006 sec_ptr section;
3007 PTR location;
3008 file_ptr offset;
3009 bfd_size_type count;
3011 if (strcmp (section->name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0)
3013 bfd_byte *c;
3015 if (elf_section_data (section) == NULL)
3017 section->used_by_bfd =
3018 (PTR) bfd_zalloc (abfd, sizeof (struct bfd_elf_section_data));
3019 if (elf_section_data (section) == NULL)
3020 return false;
3022 c = (bfd_byte *) elf_section_data (section)->tdata;
3023 if (c == NULL)
3025 bfd_size_type size;
3027 if (section->_cooked_size != 0)
3028 size = section->_cooked_size;
3029 else
3030 size = section->_raw_size;
3031 c = (bfd_byte *) bfd_zalloc (abfd, size);
3032 if (c == NULL)
3033 return false;
3034 elf_section_data (section)->tdata = (PTR) c;
3037 memcpy (c + offset, location, count);
3040 return _bfd_elf_set_section_contents (abfd, section, location, offset,
3041 count);
3044 /* Work over a section just before writing it out. This routine is
3045 used by both the 32-bit and the 64-bit ABI. FIXME: We recognize
3046 sections that need the SHF_MIPS_GPREL flag by name; there has to be
3047 a better way. */
3049 boolean
3050 _bfd_mips_elf_section_processing (abfd, hdr)
3051 bfd *abfd;
3052 Elf_Internal_Shdr *hdr;
3054 if (hdr->sh_type == SHT_MIPS_REGINFO
3055 && hdr->sh_size > 0)
3057 bfd_byte buf[4];
3059 BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo));
3060 BFD_ASSERT (hdr->contents == NULL);
3062 if (bfd_seek (abfd,
3063 hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4,
3064 SEEK_SET) == -1)
3065 return false;
3066 bfd_h_put_32 (abfd, (bfd_vma) elf_gp (abfd), buf);
3067 if (bfd_write (buf, (bfd_size_type) 1, (bfd_size_type) 4, abfd) != 4)
3068 return false;
3071 if (hdr->sh_type == SHT_MIPS_OPTIONS
3072 && hdr->bfd_section != NULL
3073 && elf_section_data (hdr->bfd_section) != NULL
3074 && elf_section_data (hdr->bfd_section)->tdata != NULL)
3076 bfd_byte *contents, *l, *lend;
3078 /* We stored the section contents in the elf_section_data tdata
3079 field in the set_section_contents routine. We save the
3080 section contents so that we don't have to read them again.
3081 At this point we know that elf_gp is set, so we can look
3082 through the section contents to see if there is an
3083 ODK_REGINFO structure. */
3085 contents = (bfd_byte *) elf_section_data (hdr->bfd_section)->tdata;
3086 l = contents;
3087 lend = contents + hdr->sh_size;
3088 while (l + sizeof (Elf_External_Options) <= lend)
3090 Elf_Internal_Options intopt;
3092 bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l,
3093 &intopt);
3094 if (ABI_64_P (abfd) && intopt.kind == ODK_REGINFO)
3096 bfd_byte buf[8];
3098 if (bfd_seek (abfd,
3099 (hdr->sh_offset
3100 + (l - contents)
3101 + sizeof (Elf_External_Options)
3102 + (sizeof (Elf64_External_RegInfo) - 8)),
3103 SEEK_SET) == -1)
3104 return false;
3105 bfd_h_put_64 (abfd, elf_gp (abfd), buf);
3106 if (bfd_write (buf, 1, 8, abfd) != 8)
3107 return false;
3109 else if (intopt.kind == ODK_REGINFO)
3111 bfd_byte buf[4];
3113 if (bfd_seek (abfd,
3114 (hdr->sh_offset
3115 + (l - contents)
3116 + sizeof (Elf_External_Options)
3117 + (sizeof (Elf32_External_RegInfo) - 4)),
3118 SEEK_SET) == -1)
3119 return false;
3120 bfd_h_put_32 (abfd, elf_gp (abfd), buf);
3121 if (bfd_write (buf, 1, 4, abfd) != 4)
3122 return false;
3124 l += intopt.size;
3128 if (hdr->bfd_section != NULL)
3130 const char *name = bfd_get_section_name (abfd, hdr->bfd_section);
3132 if (strcmp (name, ".sdata") == 0
3133 || strcmp (name, ".lit8") == 0
3134 || strcmp (name, ".lit4") == 0)
3136 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
3137 hdr->sh_type = SHT_PROGBITS;
3139 else if (strcmp (name, ".sbss") == 0)
3141 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
3142 hdr->sh_type = SHT_NOBITS;
3144 else if (strcmp (name, MIPS_ELF_SRDATA_SECTION_NAME (abfd)) == 0)
3146 hdr->sh_flags |= SHF_ALLOC | SHF_MIPS_GPREL;
3147 hdr->sh_type = SHT_PROGBITS;
3149 else if (strcmp (name, ".compact_rel") == 0)
3151 hdr->sh_flags = 0;
3152 hdr->sh_type = SHT_PROGBITS;
3154 else if (strcmp (name, ".rtproc") == 0)
3156 if (hdr->sh_addralign != 0 && hdr->sh_entsize == 0)
3158 unsigned int adjust;
3160 adjust = hdr->sh_size % hdr->sh_addralign;
3161 if (adjust != 0)
3162 hdr->sh_size += hdr->sh_addralign - adjust;
3167 return true;
3171 /* MIPS ELF uses two common sections. One is the usual one, and the
3172 other is for small objects. All the small objects are kept
3173 together, and then referenced via the gp pointer, which yields
3174 faster assembler code. This is what we use for the small common
3175 section. This approach is copied from ecoff.c. */
3176 static asection mips_elf_scom_section;
3177 static asymbol mips_elf_scom_symbol;
3178 static asymbol *mips_elf_scom_symbol_ptr;
3180 /* MIPS ELF also uses an acommon section, which represents an
3181 allocated common symbol which may be overridden by a
3182 definition in a shared library. */
3183 static asection mips_elf_acom_section;
3184 static asymbol mips_elf_acom_symbol;
3185 static asymbol *mips_elf_acom_symbol_ptr;
3187 /* Handle the special MIPS section numbers that a symbol may use.
3188 This is used for both the 32-bit and the 64-bit ABI. */
3190 void
3191 _bfd_mips_elf_symbol_processing (abfd, asym)
3192 bfd *abfd;
3193 asymbol *asym;
3195 elf_symbol_type *elfsym;
3197 elfsym = (elf_symbol_type *) asym;
3198 switch (elfsym->internal_elf_sym.st_shndx)
3200 case SHN_MIPS_ACOMMON:
3201 /* This section is used in a dynamically linked executable file.
3202 It is an allocated common section. The dynamic linker can
3203 either resolve these symbols to something in a shared
3204 library, or it can just leave them here. For our purposes,
3205 we can consider these symbols to be in a new section. */
3206 if (mips_elf_acom_section.name == NULL)
3208 /* Initialize the acommon section. */
3209 mips_elf_acom_section.name = ".acommon";
3210 mips_elf_acom_section.flags = SEC_ALLOC;
3211 mips_elf_acom_section.output_section = &mips_elf_acom_section;
3212 mips_elf_acom_section.symbol = &mips_elf_acom_symbol;
3213 mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr;
3214 mips_elf_acom_symbol.name = ".acommon";
3215 mips_elf_acom_symbol.flags = BSF_SECTION_SYM;
3216 mips_elf_acom_symbol.section = &mips_elf_acom_section;
3217 mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol;
3219 asym->section = &mips_elf_acom_section;
3220 break;
3222 case SHN_COMMON:
3223 /* Common symbols less than the GP size are automatically
3224 treated as SHN_MIPS_SCOMMON symbols on IRIX5. */
3225 if (asym->value > elf_gp_size (abfd)
3226 || IRIX_COMPAT (abfd) == ict_irix6)
3227 break;
3228 /* Fall through. */
3229 case SHN_MIPS_SCOMMON:
3230 if (mips_elf_scom_section.name == NULL)
3232 /* Initialize the small common section. */
3233 mips_elf_scom_section.name = ".scommon";
3234 mips_elf_scom_section.flags = SEC_IS_COMMON;
3235 mips_elf_scom_section.output_section = &mips_elf_scom_section;
3236 mips_elf_scom_section.symbol = &mips_elf_scom_symbol;
3237 mips_elf_scom_section.symbol_ptr_ptr = &mips_elf_scom_symbol_ptr;
3238 mips_elf_scom_symbol.name = ".scommon";
3239 mips_elf_scom_symbol.flags = BSF_SECTION_SYM;
3240 mips_elf_scom_symbol.section = &mips_elf_scom_section;
3241 mips_elf_scom_symbol_ptr = &mips_elf_scom_symbol;
3243 asym->section = &mips_elf_scom_section;
3244 asym->value = elfsym->internal_elf_sym.st_size;
3245 break;
3247 case SHN_MIPS_SUNDEFINED:
3248 asym->section = bfd_und_section_ptr;
3249 break;
3251 #if 0 /* for SGI_COMPAT */
3252 case SHN_MIPS_TEXT:
3253 asym->section = mips_elf_text_section_ptr;
3254 break;
3256 case SHN_MIPS_DATA:
3257 asym->section = mips_elf_data_section_ptr;
3258 break;
3259 #endif
3263 /* When creating an Irix 5 executable, we need REGINFO and RTPROC
3264 segments. */
3267 _bfd_mips_elf_additional_program_headers (abfd)
3268 bfd *abfd;
3270 asection *s;
3271 int ret = 0;
3273 /* See if we need a PT_MIPS_REGINFO segment. */
3274 s = bfd_get_section_by_name (abfd, ".reginfo");
3275 if (s && (s->flags & SEC_LOAD))
3276 ++ret;
3278 /* See if we need a PT_MIPS_OPTIONS segment. */
3279 if (IRIX_COMPAT (abfd) == ict_irix6
3280 && bfd_get_section_by_name (abfd,
3281 MIPS_ELF_OPTIONS_SECTION_NAME (abfd)))
3282 ++ret;
3284 /* See if we need a PT_MIPS_RTPROC segment. */
3285 if (IRIX_COMPAT (abfd) == ict_irix5
3286 && bfd_get_section_by_name (abfd, ".dynamic")
3287 && bfd_get_section_by_name (abfd, ".mdebug"))
3288 ++ret;
3290 return ret;
3293 /* Modify the segment map for an Irix 5 executable. */
3295 boolean
3296 _bfd_mips_elf_modify_segment_map (abfd)
3297 bfd *abfd;
3299 asection *s;
3300 struct elf_segment_map *m, **pm;
3302 /* If there is a .reginfo section, we need a PT_MIPS_REGINFO
3303 segment. */
3304 s = bfd_get_section_by_name (abfd, ".reginfo");
3305 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3307 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3308 if (m->p_type == PT_MIPS_REGINFO)
3309 break;
3310 if (m == NULL)
3312 m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m);
3313 if (m == NULL)
3314 return false;
3316 m->p_type = PT_MIPS_REGINFO;
3317 m->count = 1;
3318 m->sections[0] = s;
3320 /* We want to put it after the PHDR and INTERP segments. */
3321 pm = &elf_tdata (abfd)->segment_map;
3322 while (*pm != NULL
3323 && ((*pm)->p_type == PT_PHDR
3324 || (*pm)->p_type == PT_INTERP))
3325 pm = &(*pm)->next;
3327 m->next = *pm;
3328 *pm = m;
3332 /* For IRIX 6, we don't have .mdebug sections, nor does anything but
3333 .dynamic end up in PT_DYNAMIC. However, we do have to insert a
3334 PT_OPTIONS segement immediately following the program header
3335 table. */
3336 if (IRIX_COMPAT (abfd) == ict_irix6)
3338 asection *s;
3340 for (s = abfd->sections; s; s = s->next)
3341 if (elf_section_data (s)->this_hdr.sh_type == SHT_MIPS_OPTIONS)
3342 break;
3344 if (s)
3346 struct elf_segment_map *options_segment;
3348 /* Usually, there's a program header table. But, sometimes
3349 there's not (like when running the `ld' testsuite). So,
3350 if there's no program header table, we just put the
3351 options segement at the end. */
3352 for (pm = &elf_tdata (abfd)->segment_map;
3353 *pm != NULL;
3354 pm = &(*pm)->next)
3355 if ((*pm)->p_type == PT_PHDR)
3356 break;
3358 options_segment = bfd_zalloc (abfd,
3359 sizeof (struct elf_segment_map));
3360 options_segment->next = *pm;
3361 options_segment->p_type = PT_MIPS_OPTIONS;
3362 options_segment->p_flags = PF_R;
3363 options_segment->p_flags_valid = true;
3364 options_segment->count = 1;
3365 options_segment->sections[0] = s;
3366 *pm = options_segment;
3369 else
3371 if (IRIX_COMPAT (abfd) == ict_irix5)
3373 /* If there are .dynamic and .mdebug sections, we make a room
3374 for the RTPROC header. FIXME: Rewrite without section names. */
3375 if (bfd_get_section_by_name (abfd, ".interp") == NULL
3376 && bfd_get_section_by_name (abfd, ".dynamic") != NULL
3377 && bfd_get_section_by_name (abfd, ".mdebug") != NULL)
3379 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3380 if (m->p_type == PT_MIPS_RTPROC)
3381 break;
3382 if (m == NULL)
3384 m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m);
3385 if (m == NULL)
3386 return false;
3388 m->p_type = PT_MIPS_RTPROC;
3390 s = bfd_get_section_by_name (abfd, ".rtproc");
3391 if (s == NULL)
3393 m->count = 0;
3394 m->p_flags = 0;
3395 m->p_flags_valid = 1;
3397 else
3399 m->count = 1;
3400 m->sections[0] = s;
3403 /* We want to put it after the DYNAMIC segment. */
3404 pm = &elf_tdata (abfd)->segment_map;
3405 while (*pm != NULL && (*pm)->p_type != PT_DYNAMIC)
3406 pm = &(*pm)->next;
3407 if (*pm != NULL)
3408 pm = &(*pm)->next;
3410 m->next = *pm;
3411 *pm = m;
3415 /* On Irix 5, the PT_DYNAMIC segment includes the .dynamic,
3416 .dynstr, .dynsym, and .hash sections, and everything in
3417 between. */
3418 for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL;
3419 pm = &(*pm)->next)
3420 if ((*pm)->p_type == PT_DYNAMIC)
3421 break;
3422 m = *pm;
3423 if (IRIX_COMPAT (abfd) == ict_none)
3425 /* For a normal mips executable the permissions for the PT_DYNAMIC
3426 segment are read, write and execute. We do that here since
3427 the code in elf.c sets only the read permission. This matters
3428 sometimes for the dynamic linker. */
3429 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3431 m->p_flags = PF_R | PF_W | PF_X;
3432 m->p_flags_valid = 1;
3435 if (m != NULL
3436 && m->count == 1 && strcmp (m->sections[0]->name, ".dynamic") == 0)
3438 static const char *sec_names[] =
3439 { ".dynamic", ".dynstr", ".dynsym", ".hash" };
3440 bfd_vma low, high;
3441 unsigned int i, c;
3442 struct elf_segment_map *n;
3444 low = 0xffffffff;
3445 high = 0;
3446 for (i = 0; i < sizeof sec_names / sizeof sec_names[0]; i++)
3448 s = bfd_get_section_by_name (abfd, sec_names[i]);
3449 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3451 bfd_size_type sz;
3453 if (low > s->vma)
3454 low = s->vma;
3455 sz = s->_cooked_size;
3456 if (sz == 0)
3457 sz = s->_raw_size;
3458 if (high < s->vma + sz)
3459 high = s->vma + sz;
3463 c = 0;
3464 for (s = abfd->sections; s != NULL; s = s->next)
3465 if ((s->flags & SEC_LOAD) != 0
3466 && s->vma >= low
3467 && ((s->vma
3468 + (s->_cooked_size !=
3469 0 ? s->_cooked_size : s->_raw_size)) <= high))
3470 ++c;
3472 n = ((struct elf_segment_map *)
3473 bfd_zalloc (abfd, sizeof *n + (c - 1) * sizeof (asection *)));
3474 if (n == NULL)
3475 return false;
3476 *n = *m;
3477 n->count = c;
3479 i = 0;
3480 for (s = abfd->sections; s != NULL; s = s->next)
3482 if ((s->flags & SEC_LOAD) != 0
3483 && s->vma >= low
3484 && ((s->vma
3485 + (s->_cooked_size != 0 ?
3486 s->_cooked_size : s->_raw_size)) <= high))
3488 n->sections[i] = s;
3489 ++i;
3493 *pm = n;
3497 return true;
3500 /* The structure of the runtime procedure descriptor created by the
3501 loader for use by the static exception system. */
3503 typedef struct runtime_pdr {
3504 bfd_vma adr; /* memory address of start of procedure */
3505 long regmask; /* save register mask */
3506 long regoffset; /* save register offset */
3507 long fregmask; /* save floating point register mask */
3508 long fregoffset; /* save floating point register offset */
3509 long frameoffset; /* frame size */
3510 short framereg; /* frame pointer register */
3511 short pcreg; /* offset or reg of return pc */
3512 long irpss; /* index into the runtime string table */
3513 long reserved;
3514 struct exception_info *exception_info;/* pointer to exception array */
3515 } RPDR, *pRPDR;
3516 #define cbRPDR sizeof(RPDR)
3517 #define rpdNil ((pRPDR) 0)
3519 /* Swap RPDR (runtime procedure table entry) for output. */
3521 static void ecoff_swap_rpdr_out
3522 PARAMS ((bfd *, const RPDR *, struct rpdr_ext *));
3524 static void
3525 ecoff_swap_rpdr_out (abfd, in, ex)
3526 bfd *abfd;
3527 const RPDR *in;
3528 struct rpdr_ext *ex;
3530 /* ecoff_put_off was defined in ecoffswap.h. */
3531 ecoff_put_off (abfd, in->adr, (bfd_byte *) ex->p_adr);
3532 bfd_h_put_32 (abfd, in->regmask, (bfd_byte *) ex->p_regmask);
3533 bfd_h_put_32 (abfd, in->regoffset, (bfd_byte *) ex->p_regoffset);
3534 bfd_h_put_32 (abfd, in->fregmask, (bfd_byte *) ex->p_fregmask);
3535 bfd_h_put_32 (abfd, in->fregoffset, (bfd_byte *) ex->p_fregoffset);
3536 bfd_h_put_32 (abfd, in->frameoffset, (bfd_byte *) ex->p_frameoffset);
3538 bfd_h_put_16 (abfd, in->framereg, (bfd_byte *) ex->p_framereg);
3539 bfd_h_put_16 (abfd, in->pcreg, (bfd_byte *) ex->p_pcreg);
3541 bfd_h_put_32 (abfd, in->irpss, (bfd_byte *) ex->p_irpss);
3542 #if 0 /* FIXME */
3543 ecoff_put_off (abfd, in->exception_info, (bfd_byte *) ex->p_exception_info);
3544 #endif
3547 /* Read ECOFF debugging information from a .mdebug section into a
3548 ecoff_debug_info structure. */
3550 boolean
3551 _bfd_mips_elf_read_ecoff_info (abfd, section, debug)
3552 bfd *abfd;
3553 asection *section;
3554 struct ecoff_debug_info *debug;
3556 HDRR *symhdr;
3557 const struct ecoff_debug_swap *swap;
3558 char *ext_hdr = NULL;
3560 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
3561 memset (debug, 0, sizeof(*debug));
3563 ext_hdr = (char *) bfd_malloc ((size_t) swap->external_hdr_size);
3564 if (ext_hdr == NULL && swap->external_hdr_size != 0)
3565 goto error_return;
3567 if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
3568 swap->external_hdr_size)
3569 == false)
3570 goto error_return;
3572 symhdr = &debug->symbolic_header;
3573 (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
3575 /* The symbolic header contains absolute file offsets and sizes to
3576 read. */
3577 #define READ(ptr, offset, count, size, type) \
3578 if (symhdr->count == 0) \
3579 debug->ptr = NULL; \
3580 else \
3582 debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \
3583 if (debug->ptr == NULL) \
3584 goto error_return; \
3585 if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
3586 || (bfd_read (debug->ptr, size, symhdr->count, \
3587 abfd) != size * symhdr->count)) \
3588 goto error_return; \
3591 READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
3592 READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
3593 READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
3594 READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
3595 READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
3596 READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
3597 union aux_ext *);
3598 READ (ss, cbSsOffset, issMax, sizeof (char), char *);
3599 READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
3600 READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
3601 READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
3602 READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
3603 #undef READ
3605 debug->fdr = NULL;
3606 debug->adjust = NULL;
3608 return true;
3610 error_return:
3611 if (ext_hdr != NULL)
3612 free (ext_hdr);
3613 if (debug->line != NULL)
3614 free (debug->line);
3615 if (debug->external_dnr != NULL)
3616 free (debug->external_dnr);
3617 if (debug->external_pdr != NULL)
3618 free (debug->external_pdr);
3619 if (debug->external_sym != NULL)
3620 free (debug->external_sym);
3621 if (debug->external_opt != NULL)
3622 free (debug->external_opt);
3623 if (debug->external_aux != NULL)
3624 free (debug->external_aux);
3625 if (debug->ss != NULL)
3626 free (debug->ss);
3627 if (debug->ssext != NULL)
3628 free (debug->ssext);
3629 if (debug->external_fdr != NULL)
3630 free (debug->external_fdr);
3631 if (debug->external_rfd != NULL)
3632 free (debug->external_rfd);
3633 if (debug->external_ext != NULL)
3634 free (debug->external_ext);
3635 return false;
3638 /* MIPS ELF local labels start with '$', not 'L'. */
3640 /*ARGSUSED*/
3641 static boolean
3642 mips_elf_is_local_label_name (abfd, name)
3643 bfd *abfd;
3644 const char *name;
3646 if (name[0] == '$')
3647 return true;
3649 /* On Irix 6, the labels go back to starting with '.', so we accept
3650 the generic ELF local label syntax as well. */
3651 return _bfd_elf_is_local_label_name (abfd, name);
3654 /* MIPS ELF uses a special find_nearest_line routine in order the
3655 handle the ECOFF debugging information. */
3657 struct mips_elf_find_line
3659 struct ecoff_debug_info d;
3660 struct ecoff_find_line i;
3663 boolean
3664 _bfd_mips_elf_find_nearest_line (abfd, section, symbols, offset, filename_ptr,
3665 functionname_ptr, line_ptr)
3666 bfd *abfd;
3667 asection *section;
3668 asymbol **symbols;
3669 bfd_vma offset;
3670 const char **filename_ptr;
3671 const char **functionname_ptr;
3672 unsigned int *line_ptr;
3674 asection *msec;
3676 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
3677 filename_ptr, functionname_ptr,
3678 line_ptr))
3679 return true;
3681 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
3682 filename_ptr, functionname_ptr,
3683 line_ptr,
3684 ABI_64_P (abfd) ? 8 : 0))
3685 return true;
3687 msec = bfd_get_section_by_name (abfd, ".mdebug");
3688 if (msec != NULL)
3690 flagword origflags;
3691 struct mips_elf_find_line *fi;
3692 const struct ecoff_debug_swap * const swap =
3693 get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
3695 /* If we are called during a link, mips_elf_final_link may have
3696 cleared the SEC_HAS_CONTENTS field. We force it back on here
3697 if appropriate (which it normally will be). */
3698 origflags = msec->flags;
3699 if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
3700 msec->flags |= SEC_HAS_CONTENTS;
3702 fi = elf_tdata (abfd)->find_line_info;
3703 if (fi == NULL)
3705 bfd_size_type external_fdr_size;
3706 char *fraw_src;
3707 char *fraw_end;
3708 struct fdr *fdr_ptr;
3710 fi = ((struct mips_elf_find_line *)
3711 bfd_zalloc (abfd, sizeof (struct mips_elf_find_line)));
3712 if (fi == NULL)
3714 msec->flags = origflags;
3715 return false;
3718 if (! _bfd_mips_elf_read_ecoff_info (abfd, msec, &fi->d))
3720 msec->flags = origflags;
3721 return false;
3724 /* Swap in the FDR information. */
3725 fi->d.fdr = ((struct fdr *)
3726 bfd_alloc (abfd,
3727 (fi->d.symbolic_header.ifdMax *
3728 sizeof (struct fdr))));
3729 if (fi->d.fdr == NULL)
3731 msec->flags = origflags;
3732 return false;
3734 external_fdr_size = swap->external_fdr_size;
3735 fdr_ptr = fi->d.fdr;
3736 fraw_src = (char *) fi->d.external_fdr;
3737 fraw_end = (fraw_src
3738 + fi->d.symbolic_header.ifdMax * external_fdr_size);
3739 for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
3740 (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
3742 elf_tdata (abfd)->find_line_info = fi;
3744 /* Note that we don't bother to ever free this information.
3745 find_nearest_line is either called all the time, as in
3746 objdump -l, so the information should be saved, or it is
3747 rarely called, as in ld error messages, so the memory
3748 wasted is unimportant. Still, it would probably be a
3749 good idea for free_cached_info to throw it away. */
3752 if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
3753 &fi->i, filename_ptr, functionname_ptr,
3754 line_ptr))
3756 msec->flags = origflags;
3757 return true;
3760 msec->flags = origflags;
3763 /* Fall back on the generic ELF find_nearest_line routine. */
3765 return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
3766 filename_ptr, functionname_ptr,
3767 line_ptr);
3770 /* The mips16 compiler uses a couple of special sections to handle
3771 floating point arguments.
3773 Section names that look like .mips16.fn.FNNAME contain stubs that
3774 copy floating point arguments from the fp regs to the gp regs and
3775 then jump to FNNAME. If any 32 bit function calls FNNAME, the
3776 call should be redirected to the stub instead. If no 32 bit
3777 function calls FNNAME, the stub should be discarded. We need to
3778 consider any reference to the function, not just a call, because
3779 if the address of the function is taken we will need the stub,
3780 since the address might be passed to a 32 bit function.
3782 Section names that look like .mips16.call.FNNAME contain stubs
3783 that copy floating point arguments from the gp regs to the fp
3784 regs and then jump to FNNAME. If FNNAME is a 32 bit function,
3785 then any 16 bit function that calls FNNAME should be redirected
3786 to the stub instead. If FNNAME is not a 32 bit function, the
3787 stub should be discarded.
3789 .mips16.call.fp.FNNAME sections are similar, but contain stubs
3790 which call FNNAME and then copy the return value from the fp regs
3791 to the gp regs. These stubs store the return value in $18 while
3792 calling FNNAME; any function which might call one of these stubs
3793 must arrange to save $18 around the call. (This case is not
3794 needed for 32 bit functions that call 16 bit functions, because
3795 16 bit functions always return floating point values in both
3796 $f0/$f1 and $2/$3.)
3798 Note that in all cases FNNAME might be defined statically.
3799 Therefore, FNNAME is not used literally. Instead, the relocation
3800 information will indicate which symbol the section is for.
3802 We record any stubs that we find in the symbol table. */
3804 #define FN_STUB ".mips16.fn."
3805 #define CALL_STUB ".mips16.call."
3806 #define CALL_FP_STUB ".mips16.call.fp."
3808 /* MIPS ELF linker hash table. */
3810 struct mips_elf_link_hash_table
3812 struct elf_link_hash_table root;
3813 #if 0
3814 /* We no longer use this. */
3815 /* String section indices for the dynamic section symbols. */
3816 bfd_size_type dynsym_sec_strindex[SIZEOF_MIPS_DYNSYM_SECNAMES];
3817 #endif
3818 /* The number of .rtproc entries. */
3819 bfd_size_type procedure_count;
3820 /* The size of the .compact_rel section (if SGI_COMPAT). */
3821 bfd_size_type compact_rel_size;
3822 /* This flag indicates that the value of DT_MIPS_RLD_MAP dynamic
3823 entry is set to the address of __rld_obj_head as in Irix 5. */
3824 boolean use_rld_obj_head;
3825 /* This is the value of the __rld_map or __rld_obj_head symbol. */
3826 bfd_vma rld_value;
3827 /* This is set if we see any mips16 stub sections. */
3828 boolean mips16_stubs_seen;
3831 /* Look up an entry in a MIPS ELF linker hash table. */
3833 #define mips_elf_link_hash_lookup(table, string, create, copy, follow) \
3834 ((struct mips_elf_link_hash_entry *) \
3835 elf_link_hash_lookup (&(table)->root, (string), (create), \
3836 (copy), (follow)))
3838 /* Traverse a MIPS ELF linker hash table. */
3840 #define mips_elf_link_hash_traverse(table, func, info) \
3841 (elf_link_hash_traverse \
3842 (&(table)->root, \
3843 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
3844 (info)))
3846 /* Get the MIPS ELF linker hash table from a link_info structure. */
3848 #define mips_elf_hash_table(p) \
3849 ((struct mips_elf_link_hash_table *) ((p)->hash))
3851 static boolean mips_elf_output_extsym
3852 PARAMS ((struct mips_elf_link_hash_entry *, PTR));
3854 /* Create an entry in a MIPS ELF linker hash table. */
3856 static struct bfd_hash_entry *
3857 mips_elf_link_hash_newfunc (entry, table, string)
3858 struct bfd_hash_entry *entry;
3859 struct bfd_hash_table *table;
3860 const char *string;
3862 struct mips_elf_link_hash_entry *ret =
3863 (struct mips_elf_link_hash_entry *) entry;
3865 /* Allocate the structure if it has not already been allocated by a
3866 subclass. */
3867 if (ret == (struct mips_elf_link_hash_entry *) NULL)
3868 ret = ((struct mips_elf_link_hash_entry *)
3869 bfd_hash_allocate (table,
3870 sizeof (struct mips_elf_link_hash_entry)));
3871 if (ret == (struct mips_elf_link_hash_entry *) NULL)
3872 return (struct bfd_hash_entry *) ret;
3874 /* Call the allocation method of the superclass. */
3875 ret = ((struct mips_elf_link_hash_entry *)
3876 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3877 table, string));
3878 if (ret != (struct mips_elf_link_hash_entry *) NULL)
3880 /* Set local fields. */
3881 memset (&ret->esym, 0, sizeof (EXTR));
3882 /* We use -2 as a marker to indicate that the information has
3883 not been set. -1 means there is no associated ifd. */
3884 ret->esym.ifd = -2;
3885 ret->possibly_dynamic_relocs = 0;
3886 ret->min_dyn_reloc_index = 0;
3887 ret->fn_stub = NULL;
3888 ret->need_fn_stub = false;
3889 ret->call_stub = NULL;
3890 ret->call_fp_stub = NULL;
3893 return (struct bfd_hash_entry *) ret;
3896 void
3897 _bfd_mips_elf_hide_symbol(info, h)
3898 struct bfd_link_info *info;
3899 struct mips_elf_link_hash_entry *h;
3901 bfd *dynobj;
3902 asection *got;
3903 struct mips_got_info *g;
3904 dynobj = elf_hash_table (info)->dynobj;
3905 got = bfd_get_section_by_name (dynobj, ".got");
3906 g = (struct mips_got_info *) elf_section_data (got)->tdata;
3908 h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3909 h->root.plt.offset = (bfd_vma) -1;
3910 h->root.dynindx = -1;
3912 /* FIXME: Do we allocate too much GOT space here? */
3913 g->local_gotno++;
3914 got->_raw_size += MIPS_ELF_GOT_SIZE (dynobj);
3917 /* Create a MIPS ELF linker hash table. */
3919 struct bfd_link_hash_table *
3920 _bfd_mips_elf_link_hash_table_create (abfd)
3921 bfd *abfd;
3923 struct mips_elf_link_hash_table *ret;
3925 ret = ((struct mips_elf_link_hash_table *)
3926 bfd_alloc (abfd, sizeof (struct mips_elf_link_hash_table)));
3927 if (ret == (struct mips_elf_link_hash_table *) NULL)
3928 return NULL;
3930 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
3931 mips_elf_link_hash_newfunc))
3933 bfd_release (abfd, ret);
3934 return NULL;
3937 #if 0
3938 /* We no longer use this. */
3939 for (i = 0; i < SIZEOF_MIPS_DYNSYM_SECNAMES; i++)
3940 ret->dynsym_sec_strindex[i] = (bfd_size_type) -1;
3941 #endif
3942 ret->procedure_count = 0;
3943 ret->compact_rel_size = 0;
3944 ret->use_rld_obj_head = false;
3945 ret->rld_value = 0;
3946 ret->mips16_stubs_seen = false;
3948 return &ret->root.root;
3951 /* Hook called by the linker routine which adds symbols from an object
3952 file. We must handle the special MIPS section numbers here. */
3954 /*ARGSUSED*/
3955 boolean
3956 _bfd_mips_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
3957 bfd *abfd;
3958 struct bfd_link_info *info;
3959 const Elf_Internal_Sym *sym;
3960 const char **namep;
3961 flagword *flagsp ATTRIBUTE_UNUSED;
3962 asection **secp;
3963 bfd_vma *valp;
3965 if (SGI_COMPAT (abfd)
3966 && (abfd->flags & DYNAMIC) != 0
3967 && strcmp (*namep, "_rld_new_interface") == 0)
3969 /* Skip Irix 5 rld entry name. */
3970 *namep = NULL;
3971 return true;
3974 switch (sym->st_shndx)
3976 case SHN_COMMON:
3977 /* Common symbols less than the GP size are automatically
3978 treated as SHN_MIPS_SCOMMON symbols. */
3979 if (sym->st_size > elf_gp_size (abfd)
3980 || IRIX_COMPAT (abfd) == ict_irix6)
3981 break;
3982 /* Fall through. */
3983 case SHN_MIPS_SCOMMON:
3984 *secp = bfd_make_section_old_way (abfd, ".scommon");
3985 (*secp)->flags |= SEC_IS_COMMON;
3986 *valp = sym->st_size;
3987 break;
3989 case SHN_MIPS_TEXT:
3990 /* This section is used in a shared object. */
3991 if (elf_tdata (abfd)->elf_text_section == NULL)
3993 asymbol *elf_text_symbol;
3994 asection *elf_text_section;
3996 elf_text_section = bfd_zalloc (abfd, sizeof (asection));
3997 if (elf_text_section == NULL)
3998 return false;
4000 elf_text_symbol = bfd_zalloc (abfd, sizeof (asymbol));
4001 if (elf_text_symbol == NULL)
4002 return false;
4004 /* Initialize the section. */
4006 elf_tdata (abfd)->elf_text_section = elf_text_section;
4007 elf_tdata (abfd)->elf_text_symbol = elf_text_symbol;
4009 elf_text_section->symbol = elf_text_symbol;
4010 elf_text_section->symbol_ptr_ptr = &elf_tdata (abfd)->elf_text_symbol;
4012 elf_text_section->name = ".text";
4013 elf_text_section->flags = SEC_NO_FLAGS;
4014 elf_text_section->output_section = NULL;
4015 elf_text_section->owner = abfd;
4016 elf_text_symbol->name = ".text";
4017 elf_text_symbol->flags = BSF_SECTION_SYM | BSF_DYNAMIC;
4018 elf_text_symbol->section = elf_text_section;
4020 /* This code used to do *secp = bfd_und_section_ptr if
4021 info->shared. I don't know why, and that doesn't make sense,
4022 so I took it out. */
4023 *secp = elf_tdata (abfd)->elf_text_section;
4024 break;
4026 case SHN_MIPS_ACOMMON:
4027 /* Fall through. XXX Can we treat this as allocated data? */
4028 case SHN_MIPS_DATA:
4029 /* This section is used in a shared object. */
4030 if (elf_tdata (abfd)->elf_data_section == NULL)
4032 asymbol *elf_data_symbol;
4033 asection *elf_data_section;
4035 elf_data_section = bfd_zalloc (abfd, sizeof (asection));
4036 if (elf_data_section == NULL)
4037 return false;
4039 elf_data_symbol = bfd_zalloc (abfd, sizeof (asymbol));
4040 if (elf_data_symbol == NULL)
4041 return false;
4043 /* Initialize the section. */
4045 elf_tdata (abfd)->elf_data_section = elf_data_section;
4046 elf_tdata (abfd)->elf_data_symbol = elf_data_symbol;
4048 elf_data_section->symbol = elf_data_symbol;
4049 elf_data_section->symbol_ptr_ptr = &elf_tdata (abfd)->elf_data_symbol;
4051 elf_data_section->name = ".data";
4052 elf_data_section->flags = SEC_NO_FLAGS;
4053 elf_data_section->output_section = NULL;
4054 elf_data_section->owner = abfd;
4055 elf_data_symbol->name = ".data";
4056 elf_data_symbol->flags = BSF_SECTION_SYM | BSF_DYNAMIC;
4057 elf_data_symbol->section = elf_data_section;
4059 /* This code used to do *secp = bfd_und_section_ptr if
4060 info->shared. I don't know why, and that doesn't make sense,
4061 so I took it out. */
4062 *secp = elf_tdata (abfd)->elf_data_section;
4063 break;
4065 case SHN_MIPS_SUNDEFINED:
4066 *secp = bfd_und_section_ptr;
4067 break;
4070 if (SGI_COMPAT (abfd)
4071 && ! info->shared
4072 && info->hash->creator == abfd->xvec
4073 && strcmp (*namep, "__rld_obj_head") == 0)
4075 struct elf_link_hash_entry *h;
4077 /* Mark __rld_obj_head as dynamic. */
4078 h = NULL;
4079 if (! (_bfd_generic_link_add_one_symbol
4080 (info, abfd, *namep, BSF_GLOBAL, *secp,
4081 (bfd_vma) *valp, (const char *) NULL, false,
4082 get_elf_backend_data (abfd)->collect,
4083 (struct bfd_link_hash_entry **) &h)))
4084 return false;
4085 h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
4086 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4087 h->type = STT_OBJECT;
4089 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
4090 return false;
4092 mips_elf_hash_table (info)->use_rld_obj_head = true;
4095 /* If this is a mips16 text symbol, add 1 to the value to make it
4096 odd. This will cause something like .word SYM to come up with
4097 the right value when it is loaded into the PC. */
4098 if (sym->st_other == STO_MIPS16)
4099 ++*valp;
4101 return true;
4104 /* Structure used to pass information to mips_elf_output_extsym. */
4106 struct extsym_info
4108 bfd *abfd;
4109 struct bfd_link_info *info;
4110 struct ecoff_debug_info *debug;
4111 const struct ecoff_debug_swap *swap;
4112 boolean failed;
4115 /* This routine is used to write out ECOFF debugging external symbol
4116 information. It is called via mips_elf_link_hash_traverse. The
4117 ECOFF external symbol information must match the ELF external
4118 symbol information. Unfortunately, at this point we don't know
4119 whether a symbol is required by reloc information, so the two
4120 tables may wind up being different. We must sort out the external
4121 symbol information before we can set the final size of the .mdebug
4122 section, and we must set the size of the .mdebug section before we
4123 can relocate any sections, and we can't know which symbols are
4124 required by relocation until we relocate the sections.
4125 Fortunately, it is relatively unlikely that any symbol will be
4126 stripped but required by a reloc. In particular, it can not happen
4127 when generating a final executable. */
4129 static boolean
4130 mips_elf_output_extsym (h, data)
4131 struct mips_elf_link_hash_entry *h;
4132 PTR data;
4134 struct extsym_info *einfo = (struct extsym_info *) data;
4135 boolean strip;
4136 asection *sec, *output_section;
4138 if (h->root.indx == -2)
4139 strip = false;
4140 else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4141 || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
4142 && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4143 && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
4144 strip = true;
4145 else if (einfo->info->strip == strip_all
4146 || (einfo->info->strip == strip_some
4147 && bfd_hash_lookup (einfo->info->keep_hash,
4148 h->root.root.root.string,
4149 false, false) == NULL))
4150 strip = true;
4151 else
4152 strip = false;
4154 if (strip)
4155 return true;
4157 if (h->esym.ifd == -2)
4159 h->esym.jmptbl = 0;
4160 h->esym.cobol_main = 0;
4161 h->esym.weakext = 0;
4162 h->esym.reserved = 0;
4163 h->esym.ifd = ifdNil;
4164 h->esym.asym.value = 0;
4165 h->esym.asym.st = stGlobal;
4167 if (h->root.root.type == bfd_link_hash_undefined
4168 || h->root.root.type == bfd_link_hash_undefweak)
4170 const char *name;
4172 /* Use undefined class. Also, set class and type for some
4173 special symbols. */
4174 name = h->root.root.root.string;
4175 if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0
4176 || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0)
4178 h->esym.asym.sc = scData;
4179 h->esym.asym.st = stLabel;
4180 h->esym.asym.value = 0;
4182 else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0)
4184 h->esym.asym.sc = scAbs;
4185 h->esym.asym.st = stLabel;
4186 h->esym.asym.value =
4187 mips_elf_hash_table (einfo->info)->procedure_count;
4189 else if (strcmp (name, "_gp_disp") == 0)
4191 h->esym.asym.sc = scAbs;
4192 h->esym.asym.st = stLabel;
4193 h->esym.asym.value = elf_gp (einfo->abfd);
4195 else
4196 h->esym.asym.sc = scUndefined;
4198 else if (h->root.root.type != bfd_link_hash_defined
4199 && h->root.root.type != bfd_link_hash_defweak)
4200 h->esym.asym.sc = scAbs;
4201 else
4203 const char *name;
4205 sec = h->root.root.u.def.section;
4206 output_section = sec->output_section;
4208 /* When making a shared library and symbol h is the one from
4209 the another shared library, OUTPUT_SECTION may be null. */
4210 if (output_section == NULL)
4211 h->esym.asym.sc = scUndefined;
4212 else
4214 name = bfd_section_name (output_section->owner, output_section);
4216 if (strcmp (name, ".text") == 0)
4217 h->esym.asym.sc = scText;
4218 else if (strcmp (name, ".data") == 0)
4219 h->esym.asym.sc = scData;
4220 else if (strcmp (name, ".sdata") == 0)
4221 h->esym.asym.sc = scSData;
4222 else if (strcmp (name, ".rodata") == 0
4223 || strcmp (name, ".rdata") == 0)
4224 h->esym.asym.sc = scRData;
4225 else if (strcmp (name, ".bss") == 0)
4226 h->esym.asym.sc = scBss;
4227 else if (strcmp (name, ".sbss") == 0)
4228 h->esym.asym.sc = scSBss;
4229 else if (strcmp (name, ".init") == 0)
4230 h->esym.asym.sc = scInit;
4231 else if (strcmp (name, ".fini") == 0)
4232 h->esym.asym.sc = scFini;
4233 else
4234 h->esym.asym.sc = scAbs;
4238 h->esym.asym.reserved = 0;
4239 h->esym.asym.index = indexNil;
4242 if (h->root.root.type == bfd_link_hash_common)
4243 h->esym.asym.value = h->root.root.u.c.size;
4244 else if (h->root.root.type == bfd_link_hash_defined
4245 || h->root.root.type == bfd_link_hash_defweak)
4247 if (h->esym.asym.sc == scCommon)
4248 h->esym.asym.sc = scBss;
4249 else if (h->esym.asym.sc == scSCommon)
4250 h->esym.asym.sc = scSBss;
4252 sec = h->root.root.u.def.section;
4253 output_section = sec->output_section;
4254 if (output_section != NULL)
4255 h->esym.asym.value = (h->root.root.u.def.value
4256 + sec->output_offset
4257 + output_section->vma);
4258 else
4259 h->esym.asym.value = 0;
4261 else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4263 /* Set type and value for a symbol with a function stub. */
4264 h->esym.asym.st = stProc;
4265 sec = h->root.root.u.def.section;
4266 if (sec == NULL)
4267 h->esym.asym.value = 0;
4268 else
4270 output_section = sec->output_section;
4271 if (output_section != NULL)
4272 h->esym.asym.value = (h->root.plt.offset
4273 + sec->output_offset
4274 + output_section->vma);
4275 else
4276 h->esym.asym.value = 0;
4278 #if 0 /* FIXME? */
4279 h->esym.ifd = 0;
4280 #endif
4283 if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
4284 h->root.root.root.string,
4285 &h->esym))
4287 einfo->failed = true;
4288 return false;
4291 return true;
4294 /* Create a runtime procedure table from the .mdebug section. */
4296 static boolean
4297 mips_elf_create_procedure_table (handle, abfd, info, s, debug)
4298 PTR handle;
4299 bfd *abfd;
4300 struct bfd_link_info *info;
4301 asection *s;
4302 struct ecoff_debug_info *debug;
4304 const struct ecoff_debug_swap *swap;
4305 HDRR *hdr = &debug->symbolic_header;
4306 RPDR *rpdr, *rp;
4307 struct rpdr_ext *erp;
4308 PTR rtproc;
4309 struct pdr_ext *epdr;
4310 struct sym_ext *esym;
4311 char *ss, **sv;
4312 char *str;
4313 unsigned long size, count;
4314 unsigned long sindex;
4315 unsigned long i;
4316 PDR pdr;
4317 SYMR sym;
4318 const char *no_name_func = _("static procedure (no name)");
4320 epdr = NULL;
4321 rpdr = NULL;
4322 esym = NULL;
4323 ss = NULL;
4324 sv = NULL;
4326 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
4328 sindex = strlen (no_name_func) + 1;
4329 count = hdr->ipdMax;
4330 if (count > 0)
4332 size = swap->external_pdr_size;
4334 epdr = (struct pdr_ext *) bfd_malloc (size * count);
4335 if (epdr == NULL)
4336 goto error_return;
4338 if (! _bfd_ecoff_get_accumulated_pdr (handle, (PTR) epdr))
4339 goto error_return;
4341 size = sizeof (RPDR);
4342 rp = rpdr = (RPDR *) bfd_malloc (size * count);
4343 if (rpdr == NULL)
4344 goto error_return;
4346 sv = (char **) bfd_malloc (sizeof (char *) * count);
4347 if (sv == NULL)
4348 goto error_return;
4350 count = hdr->isymMax;
4351 size = swap->external_sym_size;
4352 esym = (struct sym_ext *) bfd_malloc (size * count);
4353 if (esym == NULL)
4354 goto error_return;
4356 if (! _bfd_ecoff_get_accumulated_sym (handle, (PTR) esym))
4357 goto error_return;
4359 count = hdr->issMax;
4360 ss = (char *) bfd_malloc (count);
4361 if (ss == NULL)
4362 goto error_return;
4363 if (! _bfd_ecoff_get_accumulated_ss (handle, (PTR) ss))
4364 goto error_return;
4366 count = hdr->ipdMax;
4367 for (i = 0; i < count; i++, rp++)
4369 (*swap->swap_pdr_in) (abfd, (PTR) (epdr + i), &pdr);
4370 (*swap->swap_sym_in) (abfd, (PTR) &esym[pdr.isym], &sym);
4371 rp->adr = sym.value;
4372 rp->regmask = pdr.regmask;
4373 rp->regoffset = pdr.regoffset;
4374 rp->fregmask = pdr.fregmask;
4375 rp->fregoffset = pdr.fregoffset;
4376 rp->frameoffset = pdr.frameoffset;
4377 rp->framereg = pdr.framereg;
4378 rp->pcreg = pdr.pcreg;
4379 rp->irpss = sindex;
4380 sv[i] = ss + sym.iss;
4381 sindex += strlen (sv[i]) + 1;
4385 size = sizeof (struct rpdr_ext) * (count + 2) + sindex;
4386 size = BFD_ALIGN (size, 16);
4387 rtproc = (PTR) bfd_alloc (abfd, size);
4388 if (rtproc == NULL)
4390 mips_elf_hash_table (info)->procedure_count = 0;
4391 goto error_return;
4394 mips_elf_hash_table (info)->procedure_count = count + 2;
4396 erp = (struct rpdr_ext *) rtproc;
4397 memset (erp, 0, sizeof (struct rpdr_ext));
4398 erp++;
4399 str = (char *) rtproc + sizeof (struct rpdr_ext) * (count + 2);
4400 strcpy (str, no_name_func);
4401 str += strlen (no_name_func) + 1;
4402 for (i = 0; i < count; i++)
4404 ecoff_swap_rpdr_out (abfd, rpdr + i, erp + i);
4405 strcpy (str, sv[i]);
4406 str += strlen (sv[i]) + 1;
4408 ecoff_put_off (abfd, (bfd_vma) -1, (bfd_byte *) (erp + count)->p_adr);
4410 /* Set the size and contents of .rtproc section. */
4411 s->_raw_size = size;
4412 s->contents = (bfd_byte *) rtproc;
4414 /* Skip this section later on (I don't think this currently
4415 matters, but someday it might). */
4416 s->link_order_head = (struct bfd_link_order *) NULL;
4418 if (epdr != NULL)
4419 free (epdr);
4420 if (rpdr != NULL)
4421 free (rpdr);
4422 if (esym != NULL)
4423 free (esym);
4424 if (ss != NULL)
4425 free (ss);
4426 if (sv != NULL)
4427 free (sv);
4429 return true;
4431 error_return:
4432 if (epdr != NULL)
4433 free (epdr);
4434 if (rpdr != NULL)
4435 free (rpdr);
4436 if (esym != NULL)
4437 free (esym);
4438 if (ss != NULL)
4439 free (ss);
4440 if (sv != NULL)
4441 free (sv);
4442 return false;
4445 /* A comparison routine used to sort .gptab entries. */
4447 static int
4448 gptab_compare (p1, p2)
4449 const PTR p1;
4450 const PTR p2;
4452 const Elf32_gptab *a1 = (const Elf32_gptab *) p1;
4453 const Elf32_gptab *a2 = (const Elf32_gptab *) p2;
4455 return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value;
4458 /* We need to use a special link routine to handle the .reginfo and
4459 the .mdebug sections. We need to merge all instances of these
4460 sections together, not write them all out sequentially. */
4462 boolean
4463 _bfd_mips_elf_final_link (abfd, info)
4464 bfd *abfd;
4465 struct bfd_link_info *info;
4467 asection **secpp;
4468 asection *o;
4469 struct bfd_link_order *p;
4470 asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec;
4471 asection *rtproc_sec;
4472 Elf32_RegInfo reginfo;
4473 struct ecoff_debug_info debug;
4474 const struct ecoff_debug_swap *swap
4475 = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
4476 HDRR *symhdr = &debug.symbolic_header;
4477 PTR mdebug_handle = NULL;
4478 asection *s;
4479 EXTR esym;
4480 bfd_vma last;
4481 unsigned int i;
4482 static const char * const name[] =
4483 { ".text", ".init", ".fini", ".data",
4484 ".rodata", ".sdata", ".sbss", ".bss" };
4485 static const int sc[] = { scText, scInit, scFini, scData,
4486 scRData, scSData, scSBss, scBss };
4488 /* If all the things we linked together were PIC, but we're
4489 producing an executable (rather than a shared object), then the
4490 resulting file is CPIC (i.e., it calls PIC code.) */
4491 if (!info->shared
4492 && !info->relocateable
4493 && elf_elfheader (abfd)->e_flags & EF_MIPS_PIC)
4495 elf_elfheader (abfd)->e_flags &= ~EF_MIPS_PIC;
4496 elf_elfheader (abfd)->e_flags |= EF_MIPS_CPIC;
4499 /* We'd carefully arranged the dynamic symbol indices, and then the
4500 generic size_dynamic_sections renumbered them out from under us.
4501 Rather than trying somehow to prevent the renumbering, just do
4502 the sort again. */
4503 if (elf_hash_table (info)->dynamic_sections_created)
4505 bfd *dynobj;
4506 asection *got;
4507 struct mips_got_info *g;
4509 /* When we resort, we must tell mips_elf_sort_hash_table what
4510 the lowest index it may use is. That's the number of section
4511 symbols we're going to add. The generic ELF linker only
4512 adds these symbols when building a shared object. Note that
4513 we count the sections after (possibly) removing the .options
4514 section above. */
4515 if (!mips_elf_sort_hash_table (info, (info->shared
4516 ? bfd_count_sections (abfd) + 1
4517 : 1)))
4518 return false;
4520 /* Make sure we didn't grow the global .got region. */
4521 dynobj = elf_hash_table (info)->dynobj;
4522 got = bfd_get_section_by_name (dynobj, ".got");
4523 g = (struct mips_got_info *) elf_section_data (got)->tdata;
4525 if (g->global_gotsym != NULL)
4526 BFD_ASSERT ((elf_hash_table (info)->dynsymcount
4527 - g->global_gotsym->dynindx)
4528 <= g->global_gotno);
4531 /* On IRIX5, we omit the .options section. On IRIX6, however, we
4532 include it, even though we don't process it quite right. (Some
4533 entries are supposed to be merged.) Empirically, we seem to be
4534 better off including it then not. */
4535 if (IRIX_COMPAT (abfd) == ict_irix5 || IRIX_COMPAT (abfd) == ict_none)
4536 for (secpp = &abfd->sections; *secpp != NULL; secpp = &(*secpp)->next)
4538 if (strcmp ((*secpp)->name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0)
4540 for (p = (*secpp)->link_order_head; p != NULL; p = p->next)
4541 if (p->type == bfd_indirect_link_order)
4542 p->u.indirect.section->flags &=~ SEC_HAS_CONTENTS;
4543 (*secpp)->link_order_head = NULL;
4544 *secpp = (*secpp)->next;
4545 --abfd->section_count;
4547 break;
4551 /* Get a value for the GP register. */
4552 if (elf_gp (abfd) == 0)
4554 struct bfd_link_hash_entry *h;
4556 h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true);
4557 if (h != (struct bfd_link_hash_entry *) NULL
4558 && h->type == bfd_link_hash_defined)
4559 elf_gp (abfd) = (h->u.def.value
4560 + h->u.def.section->output_section->vma
4561 + h->u.def.section->output_offset);
4562 else if (info->relocateable)
4564 bfd_vma lo;
4566 /* Find the GP-relative section with the lowest offset. */
4567 lo = (bfd_vma) -1;
4568 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
4569 if (o->vma < lo
4570 && (elf_section_data (o)->this_hdr.sh_flags & SHF_MIPS_GPREL))
4571 lo = o->vma;
4573 /* And calculate GP relative to that. */
4574 elf_gp (abfd) = lo + ELF_MIPS_GP_OFFSET (abfd);
4576 else
4578 /* If the relocate_section function needs to do a reloc
4579 involving the GP value, it should make a reloc_dangerous
4580 callback to warn that GP is not defined. */
4584 /* Go through the sections and collect the .reginfo and .mdebug
4585 information. */
4586 reginfo_sec = NULL;
4587 mdebug_sec = NULL;
4588 gptab_data_sec = NULL;
4589 gptab_bss_sec = NULL;
4590 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
4592 if (strcmp (o->name, ".reginfo") == 0)
4594 memset (&reginfo, 0, sizeof reginfo);
4596 /* We have found the .reginfo section in the output file.
4597 Look through all the link_orders comprising it and merge
4598 the information together. */
4599 for (p = o->link_order_head;
4600 p != (struct bfd_link_order *) NULL;
4601 p = p->next)
4603 asection *input_section;
4604 bfd *input_bfd;
4605 Elf32_External_RegInfo ext;
4606 Elf32_RegInfo sub;
4608 if (p->type != bfd_indirect_link_order)
4610 if (p->type == bfd_fill_link_order)
4611 continue;
4612 abort ();
4615 input_section = p->u.indirect.section;
4616 input_bfd = input_section->owner;
4618 /* The linker emulation code has probably clobbered the
4619 size to be zero bytes. */
4620 if (input_section->_raw_size == 0)
4621 input_section->_raw_size = sizeof (Elf32_External_RegInfo);
4623 if (! bfd_get_section_contents (input_bfd, input_section,
4624 (PTR) &ext,
4625 (file_ptr) 0,
4626 sizeof ext))
4627 return false;
4629 bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub);
4631 reginfo.ri_gprmask |= sub.ri_gprmask;
4632 reginfo.ri_cprmask[0] |= sub.ri_cprmask[0];
4633 reginfo.ri_cprmask[1] |= sub.ri_cprmask[1];
4634 reginfo.ri_cprmask[2] |= sub.ri_cprmask[2];
4635 reginfo.ri_cprmask[3] |= sub.ri_cprmask[3];
4637 /* ri_gp_value is set by the function
4638 mips_elf32_section_processing when the section is
4639 finally written out. */
4641 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4642 elf_link_input_bfd ignores this section. */
4643 input_section->flags &=~ SEC_HAS_CONTENTS;
4646 /* Size has been set in mips_elf_always_size_sections */
4647 BFD_ASSERT(o->_raw_size == sizeof (Elf32_External_RegInfo));
4649 /* Skip this section later on (I don't think this currently
4650 matters, but someday it might). */
4651 o->link_order_head = (struct bfd_link_order *) NULL;
4653 reginfo_sec = o;
4656 if (strcmp (o->name, ".mdebug") == 0)
4658 struct extsym_info einfo;
4660 /* We have found the .mdebug section in the output file.
4661 Look through all the link_orders comprising it and merge
4662 the information together. */
4663 symhdr->magic = swap->sym_magic;
4664 /* FIXME: What should the version stamp be? */
4665 symhdr->vstamp = 0;
4666 symhdr->ilineMax = 0;
4667 symhdr->cbLine = 0;
4668 symhdr->idnMax = 0;
4669 symhdr->ipdMax = 0;
4670 symhdr->isymMax = 0;
4671 symhdr->ioptMax = 0;
4672 symhdr->iauxMax = 0;
4673 symhdr->issMax = 0;
4674 symhdr->issExtMax = 0;
4675 symhdr->ifdMax = 0;
4676 symhdr->crfd = 0;
4677 symhdr->iextMax = 0;
4679 /* We accumulate the debugging information itself in the
4680 debug_info structure. */
4681 debug.line = NULL;
4682 debug.external_dnr = NULL;
4683 debug.external_pdr = NULL;
4684 debug.external_sym = NULL;
4685 debug.external_opt = NULL;
4686 debug.external_aux = NULL;
4687 debug.ss = NULL;
4688 debug.ssext = debug.ssext_end = NULL;
4689 debug.external_fdr = NULL;
4690 debug.external_rfd = NULL;
4691 debug.external_ext = debug.external_ext_end = NULL;
4693 mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
4694 if (mdebug_handle == (PTR) NULL)
4695 return false;
4697 esym.jmptbl = 0;
4698 esym.cobol_main = 0;
4699 esym.weakext = 0;
4700 esym.reserved = 0;
4701 esym.ifd = ifdNil;
4702 esym.asym.iss = issNil;
4703 esym.asym.st = stLocal;
4704 esym.asym.reserved = 0;
4705 esym.asym.index = indexNil;
4706 last = 0;
4707 for (i = 0; i < 8; i++)
4709 esym.asym.sc = sc[i];
4710 s = bfd_get_section_by_name (abfd, name[i]);
4711 if (s != NULL)
4713 esym.asym.value = s->vma;
4714 last = s->vma + s->_raw_size;
4716 else
4717 esym.asym.value = last;
4718 if (!bfd_ecoff_debug_one_external (abfd, &debug, swap,
4719 name[i], &esym))
4720 return false;
4723 for (p = o->link_order_head;
4724 p != (struct bfd_link_order *) NULL;
4725 p = p->next)
4727 asection *input_section;
4728 bfd *input_bfd;
4729 const struct ecoff_debug_swap *input_swap;
4730 struct ecoff_debug_info input_debug;
4731 char *eraw_src;
4732 char *eraw_end;
4734 if (p->type != bfd_indirect_link_order)
4736 if (p->type == bfd_fill_link_order)
4737 continue;
4738 abort ();
4741 input_section = p->u.indirect.section;
4742 input_bfd = input_section->owner;
4744 if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
4745 || (get_elf_backend_data (input_bfd)
4746 ->elf_backend_ecoff_debug_swap) == NULL)
4748 /* I don't know what a non MIPS ELF bfd would be
4749 doing with a .mdebug section, but I don't really
4750 want to deal with it. */
4751 continue;
4754 input_swap = (get_elf_backend_data (input_bfd)
4755 ->elf_backend_ecoff_debug_swap);
4757 BFD_ASSERT (p->size == input_section->_raw_size);
4759 /* The ECOFF linking code expects that we have already
4760 read in the debugging information and set up an
4761 ecoff_debug_info structure, so we do that now. */
4762 if (! _bfd_mips_elf_read_ecoff_info (input_bfd, input_section,
4763 &input_debug))
4764 return false;
4766 if (! (bfd_ecoff_debug_accumulate
4767 (mdebug_handle, abfd, &debug, swap, input_bfd,
4768 &input_debug, input_swap, info)))
4769 return false;
4771 /* Loop through the external symbols. For each one with
4772 interesting information, try to find the symbol in
4773 the linker global hash table and save the information
4774 for the output external symbols. */
4775 eraw_src = input_debug.external_ext;
4776 eraw_end = (eraw_src
4777 + (input_debug.symbolic_header.iextMax
4778 * input_swap->external_ext_size));
4779 for (;
4780 eraw_src < eraw_end;
4781 eraw_src += input_swap->external_ext_size)
4783 EXTR ext;
4784 const char *name;
4785 struct mips_elf_link_hash_entry *h;
4787 (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
4788 if (ext.asym.sc == scNil
4789 || ext.asym.sc == scUndefined
4790 || ext.asym.sc == scSUndefined)
4791 continue;
4793 name = input_debug.ssext + ext.asym.iss;
4794 h = mips_elf_link_hash_lookup (mips_elf_hash_table (info),
4795 name, false, false, true);
4796 if (h == NULL || h->esym.ifd != -2)
4797 continue;
4799 if (ext.ifd != -1)
4801 BFD_ASSERT (ext.ifd
4802 < input_debug.symbolic_header.ifdMax);
4803 ext.ifd = input_debug.ifdmap[ext.ifd];
4806 h->esym = ext;
4809 /* Free up the information we just read. */
4810 free (input_debug.line);
4811 free (input_debug.external_dnr);
4812 free (input_debug.external_pdr);
4813 free (input_debug.external_sym);
4814 free (input_debug.external_opt);
4815 free (input_debug.external_aux);
4816 free (input_debug.ss);
4817 free (input_debug.ssext);
4818 free (input_debug.external_fdr);
4819 free (input_debug.external_rfd);
4820 free (input_debug.external_ext);
4822 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4823 elf_link_input_bfd ignores this section. */
4824 input_section->flags &=~ SEC_HAS_CONTENTS;
4827 if (SGI_COMPAT (abfd) && info->shared)
4829 /* Create .rtproc section. */
4830 rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc");
4831 if (rtproc_sec == NULL)
4833 flagword flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
4834 | SEC_LINKER_CREATED | SEC_READONLY);
4836 rtproc_sec = bfd_make_section (abfd, ".rtproc");
4837 if (rtproc_sec == NULL
4838 || ! bfd_set_section_flags (abfd, rtproc_sec, flags)
4839 || ! bfd_set_section_alignment (abfd, rtproc_sec, 4))
4840 return false;
4843 if (! mips_elf_create_procedure_table (mdebug_handle, abfd,
4844 info, rtproc_sec, &debug))
4845 return false;
4848 /* Build the external symbol information. */
4849 einfo.abfd = abfd;
4850 einfo.info = info;
4851 einfo.debug = &debug;
4852 einfo.swap = swap;
4853 einfo.failed = false;
4854 mips_elf_link_hash_traverse (mips_elf_hash_table (info),
4855 mips_elf_output_extsym,
4856 (PTR) &einfo);
4857 if (einfo.failed)
4858 return false;
4860 /* Set the size of the .mdebug section. */
4861 o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
4863 /* Skip this section later on (I don't think this currently
4864 matters, but someday it might). */
4865 o->link_order_head = (struct bfd_link_order *) NULL;
4867 mdebug_sec = o;
4870 if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0)
4872 const char *subname;
4873 unsigned int c;
4874 Elf32_gptab *tab;
4875 Elf32_External_gptab *ext_tab;
4876 unsigned int i;
4878 /* The .gptab.sdata and .gptab.sbss sections hold
4879 information describing how the small data area would
4880 change depending upon the -G switch. These sections
4881 not used in executables files. */
4882 if (! info->relocateable)
4884 asection **secpp;
4886 for (p = o->link_order_head;
4887 p != (struct bfd_link_order *) NULL;
4888 p = p->next)
4890 asection *input_section;
4892 if (p->type != bfd_indirect_link_order)
4894 if (p->type == bfd_fill_link_order)
4895 continue;
4896 abort ();
4899 input_section = p->u.indirect.section;
4901 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4902 elf_link_input_bfd ignores this section. */
4903 input_section->flags &=~ SEC_HAS_CONTENTS;
4906 /* Skip this section later on (I don't think this
4907 currently matters, but someday it might). */
4908 o->link_order_head = (struct bfd_link_order *) NULL;
4910 /* Really remove the section. */
4911 for (secpp = &abfd->sections;
4912 *secpp != o;
4913 secpp = &(*secpp)->next)
4915 *secpp = (*secpp)->next;
4916 --abfd->section_count;
4918 continue;
4921 /* There is one gptab for initialized data, and one for
4922 uninitialized data. */
4923 if (strcmp (o->name, ".gptab.sdata") == 0)
4924 gptab_data_sec = o;
4925 else if (strcmp (o->name, ".gptab.sbss") == 0)
4926 gptab_bss_sec = o;
4927 else
4929 (*_bfd_error_handler)
4930 (_("%s: illegal section name `%s'"),
4931 bfd_get_filename (abfd), o->name);
4932 bfd_set_error (bfd_error_nonrepresentable_section);
4933 return false;
4936 /* The linker script always combines .gptab.data and
4937 .gptab.sdata into .gptab.sdata, and likewise for
4938 .gptab.bss and .gptab.sbss. It is possible that there is
4939 no .sdata or .sbss section in the output file, in which
4940 case we must change the name of the output section. */
4941 subname = o->name + sizeof ".gptab" - 1;
4942 if (bfd_get_section_by_name (abfd, subname) == NULL)
4944 if (o == gptab_data_sec)
4945 o->name = ".gptab.data";
4946 else
4947 o->name = ".gptab.bss";
4948 subname = o->name + sizeof ".gptab" - 1;
4949 BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL);
4952 /* Set up the first entry. */
4953 c = 1;
4954 tab = (Elf32_gptab *) bfd_malloc (c * sizeof (Elf32_gptab));
4955 if (tab == NULL)
4956 return false;
4957 tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd);
4958 tab[0].gt_header.gt_unused = 0;
4960 /* Combine the input sections. */
4961 for (p = o->link_order_head;
4962 p != (struct bfd_link_order *) NULL;
4963 p = p->next)
4965 asection *input_section;
4966 bfd *input_bfd;
4967 bfd_size_type size;
4968 unsigned long last;
4969 bfd_size_type gpentry;
4971 if (p->type != bfd_indirect_link_order)
4973 if (p->type == bfd_fill_link_order)
4974 continue;
4975 abort ();
4978 input_section = p->u.indirect.section;
4979 input_bfd = input_section->owner;
4981 /* Combine the gptab entries for this input section one
4982 by one. We know that the input gptab entries are
4983 sorted by ascending -G value. */
4984 size = bfd_section_size (input_bfd, input_section);
4985 last = 0;
4986 for (gpentry = sizeof (Elf32_External_gptab);
4987 gpentry < size;
4988 gpentry += sizeof (Elf32_External_gptab))
4990 Elf32_External_gptab ext_gptab;
4991 Elf32_gptab int_gptab;
4992 unsigned long val;
4993 unsigned long add;
4994 boolean exact;
4995 unsigned int look;
4997 if (! (bfd_get_section_contents
4998 (input_bfd, input_section, (PTR) &ext_gptab,
4999 gpentry, sizeof (Elf32_External_gptab))))
5001 free (tab);
5002 return false;
5005 bfd_mips_elf32_swap_gptab_in (input_bfd, &ext_gptab,
5006 &int_gptab);
5007 val = int_gptab.gt_entry.gt_g_value;
5008 add = int_gptab.gt_entry.gt_bytes - last;
5010 exact = false;
5011 for (look = 1; look < c; look++)
5013 if (tab[look].gt_entry.gt_g_value >= val)
5014 tab[look].gt_entry.gt_bytes += add;
5016 if (tab[look].gt_entry.gt_g_value == val)
5017 exact = true;
5020 if (! exact)
5022 Elf32_gptab *new_tab;
5023 unsigned int max;
5025 /* We need a new table entry. */
5026 new_tab = ((Elf32_gptab *)
5027 bfd_realloc ((PTR) tab,
5028 (c + 1) * sizeof (Elf32_gptab)));
5029 if (new_tab == NULL)
5031 free (tab);
5032 return false;
5034 tab = new_tab;
5035 tab[c].gt_entry.gt_g_value = val;
5036 tab[c].gt_entry.gt_bytes = add;
5038 /* Merge in the size for the next smallest -G
5039 value, since that will be implied by this new
5040 value. */
5041 max = 0;
5042 for (look = 1; look < c; look++)
5044 if (tab[look].gt_entry.gt_g_value < val
5045 && (max == 0
5046 || (tab[look].gt_entry.gt_g_value
5047 > tab[max].gt_entry.gt_g_value)))
5048 max = look;
5050 if (max != 0)
5051 tab[c].gt_entry.gt_bytes +=
5052 tab[max].gt_entry.gt_bytes;
5054 ++c;
5057 last = int_gptab.gt_entry.gt_bytes;
5060 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5061 elf_link_input_bfd ignores this section. */
5062 input_section->flags &=~ SEC_HAS_CONTENTS;
5065 /* The table must be sorted by -G value. */
5066 if (c > 2)
5067 qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare);
5069 /* Swap out the table. */
5070 ext_tab = ((Elf32_External_gptab *)
5071 bfd_alloc (abfd, c * sizeof (Elf32_External_gptab)));
5072 if (ext_tab == NULL)
5074 free (tab);
5075 return false;
5078 for (i = 0; i < c; i++)
5079 bfd_mips_elf32_swap_gptab_out (abfd, tab + i, ext_tab + i);
5080 free (tab);
5082 o->_raw_size = c * sizeof (Elf32_External_gptab);
5083 o->contents = (bfd_byte *) ext_tab;
5085 /* Skip this section later on (I don't think this currently
5086 matters, but someday it might). */
5087 o->link_order_head = (struct bfd_link_order *) NULL;
5091 /* Invoke the regular ELF backend linker to do all the work. */
5092 if (ABI_64_P (abfd))
5094 #ifdef BFD64
5095 if (!bfd_elf64_bfd_final_link (abfd, info))
5096 return false;
5097 #else
5098 abort ();
5099 return false;
5100 #endif /* BFD64 */
5102 else if (!bfd_elf32_bfd_final_link (abfd, info))
5103 return false;
5105 /* Now write out the computed sections. */
5107 if (reginfo_sec != (asection *) NULL)
5109 Elf32_External_RegInfo ext;
5111 bfd_mips_elf32_swap_reginfo_out (abfd, &reginfo, &ext);
5112 if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext,
5113 (file_ptr) 0, sizeof ext))
5114 return false;
5117 if (mdebug_sec != (asection *) NULL)
5119 BFD_ASSERT (abfd->output_has_begun);
5120 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
5121 swap, info,
5122 mdebug_sec->filepos))
5123 return false;
5125 bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
5128 if (gptab_data_sec != (asection *) NULL)
5130 if (! bfd_set_section_contents (abfd, gptab_data_sec,
5131 gptab_data_sec->contents,
5132 (file_ptr) 0,
5133 gptab_data_sec->_raw_size))
5134 return false;
5137 if (gptab_bss_sec != (asection *) NULL)
5139 if (! bfd_set_section_contents (abfd, gptab_bss_sec,
5140 gptab_bss_sec->contents,
5141 (file_ptr) 0,
5142 gptab_bss_sec->_raw_size))
5143 return false;
5146 if (SGI_COMPAT (abfd))
5148 rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc");
5149 if (rtproc_sec != NULL)
5151 if (! bfd_set_section_contents (abfd, rtproc_sec,
5152 rtproc_sec->contents,
5153 (file_ptr) 0,
5154 rtproc_sec->_raw_size))
5155 return false;
5159 return true;
5162 /* This function is called via qsort() to sort the dynamic relocation
5163 entries by increasing r_symndx value. */
5165 static int
5166 sort_dynamic_relocs (arg1,arg2)
5167 const PTR arg1;
5168 const PTR arg2;
5170 const Elf32_External_Rel *ext_reloc1 = (const Elf32_External_Rel *) arg1;
5171 const Elf32_External_Rel *ext_reloc2 = (const Elf32_External_Rel *) arg2;
5173 Elf_Internal_Rel int_reloc1;
5174 Elf_Internal_Rel int_reloc2;
5176 bfd_elf32_swap_reloc_in(reldyn_sorting_bfd, ext_reloc1, &int_reloc1);
5177 bfd_elf32_swap_reloc_in(reldyn_sorting_bfd, ext_reloc2, &int_reloc2);
5179 return (ELF32_R_SYM(int_reloc1.r_info) - ELF32_R_SYM(int_reloc2.r_info));
5182 /* Returns the GOT section for ABFD. */
5184 static asection *
5185 mips_elf_got_section (abfd)
5186 bfd *abfd;
5188 return bfd_get_section_by_name (abfd, ".got");
5191 /* Returns the GOT information associated with the link indicated by
5192 INFO. If SGOTP is non-NULL, it is filled in with the GOT
5193 section. */
5195 static struct mips_got_info *
5196 mips_elf_got_info (abfd, sgotp)
5197 bfd *abfd;
5198 asection **sgotp;
5200 asection *sgot;
5201 struct mips_got_info *g;
5203 sgot = mips_elf_got_section (abfd);
5204 BFD_ASSERT (sgot != NULL);
5205 BFD_ASSERT (elf_section_data (sgot) != NULL);
5206 g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
5207 BFD_ASSERT (g != NULL);
5209 if (sgotp)
5210 *sgotp = sgot;
5211 return g;
5214 /* Return whether a relocation is against a local symbol. */
5216 static boolean
5217 mips_elf_local_relocation_p (input_bfd, relocation, local_sections,
5218 check_forced)
5219 bfd *input_bfd;
5220 const Elf_Internal_Rela *relocation;
5221 asection **local_sections;
5222 boolean check_forced;
5224 unsigned long r_symndx;
5225 Elf_Internal_Shdr *symtab_hdr;
5226 struct mips_elf_link_hash_entry* h;
5227 size_t extsymoff;
5229 r_symndx = ELF32_R_SYM (relocation->r_info);
5230 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5231 extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info;
5233 if (r_symndx < extsymoff)
5234 return true;
5235 if (elf_bad_symtab (input_bfd) && local_sections[r_symndx] != NULL)
5236 return true;
5238 if (check_forced)
5240 /* Look up the hash table to check whether the symbol
5241 was forced local. */
5242 h = (struct mips_elf_link_hash_entry *)
5243 elf_sym_hashes (input_bfd) [r_symndx - extsymoff];
5244 /* Find the real hash-table entry for this symbol. */
5245 while (h->root.root.type == bfd_link_hash_indirect
5246 || h->root.root.type == bfd_link_hash_warning)
5247 h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link;
5248 if ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
5249 return true;
5252 return false;
5255 /* Sign-extend VALUE, which has the indicated number of BITS. */
5257 static bfd_vma
5258 mips_elf_sign_extend (value, bits)
5259 bfd_vma value;
5260 int bits;
5262 if (value & ((bfd_vma)1 << (bits - 1)))
5263 /* VALUE is negative. */
5264 value |= ((bfd_vma) - 1) << bits;
5266 return value;
5269 /* Return non-zero if the indicated VALUE has overflowed the maximum
5270 range expressable by a signed number with the indicated number of
5271 BITS. */
5273 static boolean
5274 mips_elf_overflow_p (value, bits)
5275 bfd_vma value;
5276 int bits;
5278 bfd_signed_vma svalue = (bfd_signed_vma) value;
5280 if (svalue > (1 << (bits - 1)) - 1)
5281 /* The value is too big. */
5282 return true;
5283 else if (svalue < -(1 << (bits - 1)))
5284 /* The value is too small. */
5285 return true;
5287 /* All is well. */
5288 return false;
5291 /* Calculate the %high function. */
5293 static bfd_vma
5294 mips_elf_high (value)
5295 bfd_vma value;
5297 return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff;
5300 /* Calculate the %higher function. */
5302 static bfd_vma
5303 mips_elf_higher (value)
5304 bfd_vma value ATTRIBUTE_UNUSED;
5306 #ifdef BFD64
5307 return ((value + (bfd_vma) 0x80008000) >> 32) & 0xffff;
5308 #else
5309 abort ();
5310 return (bfd_vma) -1;
5311 #endif
5314 /* Calculate the %highest function. */
5316 static bfd_vma
5317 mips_elf_highest (value)
5318 bfd_vma value ATTRIBUTE_UNUSED;
5320 #ifdef BFD64
5321 return ((value + (bfd_vma) 0x800080008000) >> 48) & 0xffff;
5322 #else
5323 abort ();
5324 return (bfd_vma) -1;
5325 #endif
5328 /* Returns the GOT index for the global symbol indicated by H. */
5330 static bfd_vma
5331 mips_elf_global_got_index (abfd, h)
5332 bfd *abfd;
5333 struct elf_link_hash_entry *h;
5335 bfd_vma index;
5336 asection *sgot;
5337 struct mips_got_info *g;
5339 g = mips_elf_got_info (abfd, &sgot);
5341 /* Once we determine the global GOT entry with the lowest dynamic
5342 symbol table index, we must put all dynamic symbols with greater
5343 indices into the GOT. That makes it easy to calculate the GOT
5344 offset. */
5345 BFD_ASSERT (h->dynindx >= g->global_gotsym->dynindx);
5346 index = ((h->dynindx - g->global_gotsym->dynindx + g->local_gotno)
5347 * MIPS_ELF_GOT_SIZE (abfd));
5348 BFD_ASSERT (index < sgot->_raw_size);
5350 return index;
5353 /* Returns the offset for the entry at the INDEXth position
5354 in the GOT. */
5356 static bfd_vma
5357 mips_elf_got_offset_from_index (dynobj, output_bfd, index)
5358 bfd *dynobj;
5359 bfd *output_bfd;
5360 bfd_vma index;
5362 asection *sgot;
5363 bfd_vma gp;
5365 sgot = mips_elf_got_section (dynobj);
5366 gp = _bfd_get_gp_value (output_bfd);
5367 return (sgot->output_section->vma + sgot->output_offset + index -
5368 gp);
5371 /* If H is a symbol that needs a global GOT entry, but has a dynamic
5372 symbol table index lower than any we've seen to date, record it for
5373 posterity. */
5375 static boolean
5376 mips_elf_record_global_got_symbol (h, info, g)
5377 struct elf_link_hash_entry *h;
5378 struct bfd_link_info *info;
5379 struct mips_got_info *g ATTRIBUTE_UNUSED;
5381 /* A global symbol in the GOT must also be in the dynamic symbol
5382 table. */
5383 if (h->dynindx == -1
5384 && !bfd_elf32_link_record_dynamic_symbol (info, h))
5385 return false;
5387 /* If we've already marked this entry as need GOT space, we don't
5388 need to do it again. */
5389 if (h->got.offset != (bfd_vma) - 1)
5390 return true;
5392 /* By setting this to a value other than -1, we are indicating that
5393 there needs to be a GOT entry for H. */
5394 h->got.offset = 0;
5396 return true;
5399 /* This structure is passed to mips_elf_sort_hash_table_f when sorting
5400 the dynamic symbols. */
5402 struct mips_elf_hash_sort_data
5404 /* The symbol in the global GOT with the lowest dynamic symbol table
5405 index. */
5406 struct elf_link_hash_entry *low;
5407 /* The least dynamic symbol table index corresponding to a symbol
5408 with a GOT entry. */
5409 long min_got_dynindx;
5410 /* The greatest dynamic symbol table index not corresponding to a
5411 symbol without a GOT entry. */
5412 long max_non_got_dynindx;
5415 /* If H needs a GOT entry, assign it the highest available dynamic
5416 index. Otherwise, assign it the lowest available dynamic
5417 index. */
5419 static boolean
5420 mips_elf_sort_hash_table_f (h, data)
5421 struct mips_elf_link_hash_entry *h;
5422 PTR data;
5424 struct mips_elf_hash_sort_data *hsd
5425 = (struct mips_elf_hash_sort_data *) data;
5427 /* Symbols without dynamic symbol table entries aren't interesting
5428 at all. */
5429 if (h->root.dynindx == -1)
5430 return true;
5432 if (h->root.got.offset != 0)
5433 h->root.dynindx = hsd->max_non_got_dynindx++;
5434 else
5436 h->root.dynindx = --hsd->min_got_dynindx;
5437 hsd->low = (struct elf_link_hash_entry *) h;
5440 return true;
5443 /* Sort the dynamic symbol table so that symbols that need GOT entries
5444 appear towards the end. This reduces the amount of GOT space
5445 required. MAX_LOCAL is used to set the number of local symbols
5446 known to be in the dynamic symbol table. During
5447 mips_elf_size_dynamic_sections, this value is 1. Afterward, the
5448 section symbols are added and the count is higher. */
5450 static boolean
5451 mips_elf_sort_hash_table (info, max_local)
5452 struct bfd_link_info *info;
5453 unsigned long max_local;
5455 struct mips_elf_hash_sort_data hsd;
5456 struct mips_got_info *g;
5457 bfd *dynobj;
5459 dynobj = elf_hash_table (info)->dynobj;
5461 hsd.low = NULL;
5462 hsd.min_got_dynindx = elf_hash_table (info)->dynsymcount;
5463 hsd.max_non_got_dynindx = max_local;
5464 mips_elf_link_hash_traverse (((struct mips_elf_link_hash_table *)
5465 elf_hash_table (info)),
5466 mips_elf_sort_hash_table_f,
5467 &hsd);
5469 /* There shoud have been enough room in the symbol table to
5470 accomodate both the GOT and non-GOT symbols. */
5471 BFD_ASSERT (hsd.max_non_got_dynindx <= hsd.min_got_dynindx);
5473 /* Now we know which dynamic symbol has the lowest dynamic symbol
5474 table index in the GOT. */
5475 g = mips_elf_got_info (dynobj, NULL);
5476 g->global_gotsym = hsd.low;
5478 return true;
5481 /* Create a local GOT entry for VALUE. Return the index of the entry,
5482 or -1 if it could not be created. */
5484 static bfd_vma
5485 mips_elf_create_local_got_entry (abfd, g, sgot, value)
5486 bfd *abfd;
5487 struct mips_got_info *g;
5488 asection *sgot;
5489 bfd_vma value;
5491 if (g->assigned_gotno >= g->local_gotno)
5493 /* We didn't allocate enough space in the GOT. */
5494 (*_bfd_error_handler)
5495 (_("not enough GOT space for local GOT entries"));
5496 bfd_set_error (bfd_error_bad_value);
5497 return (bfd_vma) -1;
5500 MIPS_ELF_PUT_WORD (abfd, value,
5501 (sgot->contents
5502 + MIPS_ELF_GOT_SIZE (abfd) * g->assigned_gotno));
5503 return MIPS_ELF_GOT_SIZE (abfd) * g->assigned_gotno++;
5506 /* Returns the GOT offset at which the indicated address can be found.
5507 If there is not yet a GOT entry for this value, create one. Returns
5508 -1 if no satisfactory GOT offset can be found. */
5510 static bfd_vma
5511 mips_elf_local_got_index (abfd, info, value)
5512 bfd *abfd;
5513 struct bfd_link_info *info;
5514 bfd_vma value;
5516 asection *sgot;
5517 struct mips_got_info *g;
5518 bfd_byte *entry;
5520 g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
5522 /* Look to see if we already have an appropriate entry. */
5523 for (entry = (sgot->contents
5524 + MIPS_ELF_GOT_SIZE (abfd) * MIPS_RESERVED_GOTNO);
5525 entry != sgot->contents + MIPS_ELF_GOT_SIZE (abfd) * g->assigned_gotno;
5526 entry += MIPS_ELF_GOT_SIZE (abfd))
5528 bfd_vma address = MIPS_ELF_GET_WORD (abfd, entry);
5529 if (address == value)
5530 return entry - sgot->contents;
5533 return mips_elf_create_local_got_entry (abfd, g, sgot, value);
5536 /* Find a GOT entry that is within 32KB of the VALUE. These entries
5537 are supposed to be placed at small offsets in the GOT, i.e.,
5538 within 32KB of GP. Return the index into the GOT for this page,
5539 and store the offset from this entry to the desired address in
5540 OFFSETP, if it is non-NULL. */
5542 static bfd_vma
5543 mips_elf_got_page (abfd, info, value, offsetp)
5544 bfd *abfd;
5545 struct bfd_link_info *info;
5546 bfd_vma value;
5547 bfd_vma *offsetp;
5549 asection *sgot;
5550 struct mips_got_info *g;
5551 bfd_byte *entry;
5552 bfd_byte *last_entry;
5553 bfd_vma index = 0;
5554 bfd_vma address;
5556 g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
5558 /* Look to see if we aleady have an appropriate entry. */
5559 last_entry = sgot->contents + MIPS_ELF_GOT_SIZE (abfd) * g->assigned_gotno;
5560 for (entry = (sgot->contents
5561 + MIPS_ELF_GOT_SIZE (abfd) * MIPS_RESERVED_GOTNO);
5562 entry != last_entry;
5563 entry += MIPS_ELF_GOT_SIZE (abfd))
5565 address = MIPS_ELF_GET_WORD (abfd, entry);
5567 if (!mips_elf_overflow_p (value - address, 16))
5569 /* This entry will serve as the page pointer. We can add a
5570 16-bit number to it to get the actual address. */
5571 index = entry - sgot->contents;
5572 break;
5576 /* If we didn't have an appropriate entry, we create one now. */
5577 if (entry == last_entry)
5578 index = mips_elf_create_local_got_entry (abfd, g, sgot, value);
5580 if (offsetp)
5582 address = MIPS_ELF_GET_WORD (abfd, entry);
5583 *offsetp = value - address;
5586 return index;
5589 /* Find a GOT entry whose higher-order 16 bits are the same as those
5590 for value. Return the index into the GOT for this entry. */
5592 static bfd_vma
5593 mips_elf_got16_entry (abfd, info, value, external)
5594 bfd *abfd;
5595 struct bfd_link_info *info;
5596 bfd_vma value;
5597 boolean external;
5599 asection *sgot;
5600 struct mips_got_info *g;
5601 bfd_byte *entry;
5602 bfd_byte *last_entry;
5603 bfd_vma index = 0;
5604 bfd_vma address;
5606 if (! external)
5608 /* Although the ABI says that it is "the high-order 16 bits" that we
5609 want, it is really the %high value. The complete value is
5610 calculated with a `addiu' of a LO16 relocation, just as with a
5611 HI16/LO16 pair. */
5612 value = mips_elf_high (value) << 16;
5615 g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
5617 /* Look to see if we already have an appropriate entry. */
5618 last_entry = sgot->contents + MIPS_ELF_GOT_SIZE (abfd) * g->assigned_gotno;
5619 for (entry = (sgot->contents
5620 + MIPS_ELF_GOT_SIZE (abfd) * MIPS_RESERVED_GOTNO);
5621 entry != last_entry;
5622 entry += MIPS_ELF_GOT_SIZE (abfd))
5624 address = MIPS_ELF_GET_WORD (abfd, entry);
5625 if (address == value)
5627 /* This entry has the right high-order 16 bits, and the low-order
5628 16 bits are set to zero. */
5629 index = entry - sgot->contents;
5630 break;
5634 /* If we didn't have an appropriate entry, we create one now. */
5635 if (entry == last_entry)
5636 index = mips_elf_create_local_got_entry (abfd, g, sgot, value);
5638 return index;
5641 /* Returns the first relocation of type r_type found, beginning with
5642 RELOCATION. RELEND is one-past-the-end of the relocation table. */
5644 static const Elf_Internal_Rela *
5645 mips_elf_next_relocation (r_type, relocation, relend)
5646 unsigned int r_type;
5647 const Elf_Internal_Rela *relocation;
5648 const Elf_Internal_Rela *relend;
5650 /* According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must be
5651 immediately following. However, for the IRIX6 ABI, the next
5652 relocation may be a composed relocation consisting of several
5653 relocations for the same address. In that case, the R_MIPS_LO16
5654 relocation may occur as one of these. We permit a similar
5655 extension in general, as that is useful for GCC. */
5656 while (relocation < relend)
5658 if (ELF32_R_TYPE (relocation->r_info) == r_type)
5659 return relocation;
5661 ++relocation;
5664 /* We didn't find it. */
5665 bfd_set_error (bfd_error_bad_value);
5666 return NULL;
5669 /* Create a rel.dyn relocation for the dynamic linker to resolve. REL
5670 is the original relocation, which is now being transformed into a
5671 dynamic relocation. The ADDENDP is adjusted if necessary; the
5672 caller should store the result in place of the original addend. */
5674 static boolean
5675 mips_elf_create_dynamic_relocation (output_bfd, info, rel, h, sec,
5676 symbol, addendp, input_section)
5677 bfd *output_bfd;
5678 struct bfd_link_info *info;
5679 const Elf_Internal_Rela *rel;
5680 struct mips_elf_link_hash_entry *h;
5681 asection *sec;
5682 bfd_vma symbol;
5683 bfd_vma *addendp;
5684 asection *input_section;
5686 Elf_Internal_Rel outrel;
5687 boolean skip;
5688 asection *sreloc;
5689 bfd *dynobj;
5690 int r_type;
5692 r_type = ELF32_R_TYPE (rel->r_info);
5693 dynobj = elf_hash_table (info)->dynobj;
5694 sreloc
5695 = bfd_get_section_by_name (dynobj,
5696 MIPS_ELF_REL_DYN_SECTION_NAME (output_bfd));
5697 BFD_ASSERT (sreloc != NULL);
5698 BFD_ASSERT (sreloc->contents != NULL);
5700 skip = false;
5702 /* We begin by assuming that the offset for the dynamic relocation
5703 is the same as for the original relocation. We'll adjust this
5704 later to reflect the correct output offsets. */
5705 if (elf_section_data (input_section)->stab_info == NULL)
5706 outrel.r_offset = rel->r_offset;
5707 else
5709 /* Except that in a stab section things are more complex.
5710 Because we compress stab information, the offset given in the
5711 relocation may not be the one we want; we must let the stabs
5712 machinery tell us the offset. */
5713 outrel.r_offset
5714 = (_bfd_stab_section_offset
5715 (output_bfd, &elf_hash_table (info)->stab_info,
5716 input_section,
5717 &elf_section_data (input_section)->stab_info,
5718 rel->r_offset));
5719 /* If we didn't need the relocation at all, this value will be
5720 -1. */
5721 if (outrel.r_offset == (bfd_vma) -1)
5722 skip = true;
5725 /* If we've decided to skip this relocation, just output an empty
5726 record. Note that R_MIPS_NONE == 0, so that this call to memset
5727 is a way of setting R_TYPE to R_MIPS_NONE. */
5728 if (skip)
5729 memset (&outrel, 0, sizeof (outrel));
5730 else
5732 long indx;
5733 bfd_vma section_offset;
5735 /* We must now calculate the dynamic symbol table index to use
5736 in the relocation. */
5737 if (h != NULL
5738 && (! info->symbolic || (h->root.elf_link_hash_flags
5739 & ELF_LINK_HASH_DEF_REGULAR) == 0))
5741 indx = h->root.dynindx;
5742 /* h->root.dynindx may be -1 if this symbol was marked to
5743 become local. */
5744 if (indx == -1)
5745 indx = 0;
5747 else
5749 if (sec != NULL && bfd_is_abs_section (sec))
5750 indx = 0;
5751 else if (sec == NULL || sec->owner == NULL)
5753 bfd_set_error (bfd_error_bad_value);
5754 return false;
5756 else
5758 indx = elf_section_data (sec->output_section)->dynindx;
5759 if (indx == 0)
5760 abort ();
5763 /* Figure out how far the target of the relocation is from
5764 the beginning of its section. */
5765 section_offset = symbol - sec->output_section->vma;
5766 /* The relocation we're building is section-relative.
5767 Therefore, the original addend must be adjusted by the
5768 section offset. */
5769 *addendp += symbol - sec->output_section->vma;
5770 /* Now, the relocation is just against the section. */
5771 symbol = sec->output_section->vma;
5774 /* If the relocation was previously an absolute relocation, we
5775 must adjust it by the value we give it in the dynamic symbol
5776 table. */
5777 if (r_type != R_MIPS_REL32)
5778 *addendp += symbol;
5780 /* The relocation is always an REL32 relocation because we don't
5781 know where the shared library will wind up at load-time. */
5782 outrel.r_info = ELF32_R_INFO (indx, R_MIPS_REL32);
5784 /* Adjust the output offset of the relocation to reference the
5785 correct location in the output file. */
5786 outrel.r_offset += (input_section->output_section->vma
5787 + input_section->output_offset);
5790 /* Put the relocation back out. We have to use the special
5791 relocation outputter in the 64-bit case since the 64-bit
5792 relocation format is non-standard. */
5793 if (ABI_64_P (output_bfd))
5795 (*get_elf_backend_data (output_bfd)->s->swap_reloc_out)
5796 (output_bfd, &outrel,
5797 (sreloc->contents
5798 + sreloc->reloc_count * sizeof (Elf64_Mips_External_Rel)));
5800 else
5801 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
5802 (((Elf32_External_Rel *)
5803 sreloc->contents)
5804 + sreloc->reloc_count));
5806 /* Record the index of the first relocation referencing H. This
5807 information is later emitted in the .msym section. */
5808 if (h != NULL
5809 && (h->min_dyn_reloc_index == 0
5810 || sreloc->reloc_count < h->min_dyn_reloc_index))
5811 h->min_dyn_reloc_index = sreloc->reloc_count;
5813 /* We've now added another relocation. */
5814 ++sreloc->reloc_count;
5816 /* Make sure the output section is writable. The dynamic linker
5817 will be writing to it. */
5818 elf_section_data (input_section->output_section)->this_hdr.sh_flags
5819 |= SHF_WRITE;
5821 /* On IRIX5, make an entry of compact relocation info. */
5822 if (! skip && IRIX_COMPAT (output_bfd) == ict_irix5)
5824 asection* scpt = bfd_get_section_by_name (dynobj, ".compact_rel");
5825 bfd_byte *cr;
5827 if (scpt)
5829 Elf32_crinfo cptrel;
5831 mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG);
5832 cptrel.vaddr = (rel->r_offset
5833 + input_section->output_section->vma
5834 + input_section->output_offset);
5835 if (r_type == R_MIPS_REL32)
5836 mips_elf_set_cr_type (cptrel, CRT_MIPS_REL32);
5837 else
5838 mips_elf_set_cr_type (cptrel, CRT_MIPS_WORD);
5839 mips_elf_set_cr_dist2to (cptrel, 0);
5840 cptrel.konst = *addendp;
5842 cr = (scpt->contents
5843 + sizeof (Elf32_External_compact_rel));
5844 bfd_elf32_swap_crinfo_out (output_bfd, &cptrel,
5845 ((Elf32_External_crinfo *) cr
5846 + scpt->reloc_count));
5847 ++scpt->reloc_count;
5851 return true;
5854 /* Calculate the value produced by the RELOCATION (which comes from
5855 the INPUT_BFD). The ADDEND is the addend to use for this
5856 RELOCATION; RELOCATION->R_ADDEND is ignored.
5858 The result of the relocation calculation is stored in VALUEP.
5859 REQUIRE_JALXP indicates whether or not the opcode used with this
5860 relocation must be JALX.
5862 This function returns bfd_reloc_continue if the caller need take no
5863 further action regarding this relocation, bfd_reloc_notsupported if
5864 something goes dramatically wrong, bfd_reloc_overflow if an
5865 overflow occurs, and bfd_reloc_ok to indicate success. */
5867 static bfd_reloc_status_type
5868 mips_elf_calculate_relocation (abfd,
5869 input_bfd,
5870 input_section,
5871 info,
5872 relocation,
5873 addend,
5874 howto,
5875 local_syms,
5876 local_sections,
5877 valuep,
5878 namep,
5879 require_jalxp)
5880 bfd *abfd;
5881 bfd *input_bfd;
5882 asection *input_section;
5883 struct bfd_link_info *info;
5884 const Elf_Internal_Rela *relocation;
5885 bfd_vma addend;
5886 reloc_howto_type *howto;
5887 Elf_Internal_Sym *local_syms;
5888 asection **local_sections;
5889 bfd_vma *valuep;
5890 const char **namep;
5891 boolean *require_jalxp;
5893 /* The eventual value we will return. */
5894 bfd_vma value;
5895 /* The address of the symbol against which the relocation is
5896 occurring. */
5897 bfd_vma symbol = 0;
5898 /* The final GP value to be used for the relocatable, executable, or
5899 shared object file being produced. */
5900 bfd_vma gp = (bfd_vma) - 1;
5901 /* The place (section offset or address) of the storage unit being
5902 relocated. */
5903 bfd_vma p;
5904 /* The value of GP used to create the relocatable object. */
5905 bfd_vma gp0 = (bfd_vma) - 1;
5906 /* The offset into the global offset table at which the address of
5907 the relocation entry symbol, adjusted by the addend, resides
5908 during execution. */
5909 bfd_vma g = (bfd_vma) - 1;
5910 /* The section in which the symbol referenced by the relocation is
5911 located. */
5912 asection *sec = NULL;
5913 struct mips_elf_link_hash_entry* h = NULL;
5914 /* True if the symbol referred to by this relocation is a local
5915 symbol. */
5916 boolean local_p;
5917 /* True if the symbol referred to by this relocation is "_gp_disp". */
5918 boolean gp_disp_p = false;
5919 Elf_Internal_Shdr *symtab_hdr;
5920 size_t extsymoff;
5921 unsigned long r_symndx;
5922 int r_type;
5923 /* True if overflow occurred during the calculation of the
5924 relocation value. */
5925 boolean overflowed_p;
5926 /* True if this relocation refers to a MIPS16 function. */
5927 boolean target_is_16_bit_code_p = false;
5929 /* Parse the relocation. */
5930 r_symndx = ELF32_R_SYM (relocation->r_info);
5931 r_type = ELF32_R_TYPE (relocation->r_info);
5932 p = (input_section->output_section->vma
5933 + input_section->output_offset
5934 + relocation->r_offset);
5936 /* Assume that there will be no overflow. */
5937 overflowed_p = false;
5939 /* Figure out whether or not the symbol is local, and get the offset
5940 used in the array of hash table entries. */
5941 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5942 local_p = mips_elf_local_relocation_p (input_bfd, relocation,
5943 local_sections, false);
5944 if (! elf_bad_symtab (input_bfd))
5945 extsymoff = symtab_hdr->sh_info;
5946 else
5948 /* The symbol table does not follow the rule that local symbols
5949 must come before globals. */
5950 extsymoff = 0;
5953 /* Figure out the value of the symbol. */
5954 if (local_p)
5956 Elf_Internal_Sym *sym;
5958 sym = local_syms + r_symndx;
5959 sec = local_sections[r_symndx];
5961 symbol = sec->output_section->vma + sec->output_offset;
5962 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
5963 symbol += sym->st_value;
5965 /* MIPS16 text labels should be treated as odd. */
5966 if (sym->st_other == STO_MIPS16)
5967 ++symbol;
5969 /* Record the name of this symbol, for our caller. */
5970 *namep = bfd_elf_string_from_elf_section (input_bfd,
5971 symtab_hdr->sh_link,
5972 sym->st_name);
5973 if (*namep == '\0')
5974 *namep = bfd_section_name (input_bfd, sec);
5976 target_is_16_bit_code_p = (sym->st_other == STO_MIPS16);
5978 else
5980 /* For global symbols we look up the symbol in the hash-table. */
5981 h = ((struct mips_elf_link_hash_entry *)
5982 elf_sym_hashes (input_bfd) [r_symndx - extsymoff]);
5983 /* Find the real hash-table entry for this symbol. */
5984 while (h->root.root.type == bfd_link_hash_indirect
5985 || h->root.root.type == bfd_link_hash_warning)
5986 h = (struct mips_elf_link_hash_entry *) h->root.root.u.i.link;
5988 /* Record the name of this symbol, for our caller. */
5989 *namep = h->root.root.root.string;
5991 /* See if this is the special _gp_disp symbol. Note that such a
5992 symbol must always be a global symbol. */
5993 if (strcmp (h->root.root.root.string, "_gp_disp") == 0)
5995 /* Relocations against _gp_disp are permitted only with
5996 R_MIPS_HI16 and R_MIPS_LO16 relocations. */
5997 if (r_type != R_MIPS_HI16 && r_type != R_MIPS_LO16)
5998 return bfd_reloc_notsupported;
6000 gp_disp_p = true;
6002 /* If this symbol is defined, calculate its address. Note that
6003 _gp_disp is a magic symbol, always implicitly defined by the
6004 linker, so it's inappropriate to check to see whether or not
6005 its defined. */
6006 else if ((h->root.root.type == bfd_link_hash_defined
6007 || h->root.root.type == bfd_link_hash_defweak)
6008 && h->root.root.u.def.section)
6010 sec = h->root.root.u.def.section;
6011 if (sec->output_section)
6012 symbol = (h->root.root.u.def.value
6013 + sec->output_section->vma
6014 + sec->output_offset);
6015 else
6016 symbol = h->root.root.u.def.value;
6018 else if (h->root.root.type == bfd_link_hash_undefweak)
6019 /* We allow relocations against undefined weak symbols, giving
6020 it the value zero, so that you can undefined weak functions
6021 and check to see if they exist by looking at their
6022 addresses. */
6023 symbol = 0;
6024 else if (info->shared && !info->symbolic && !info->no_undefined
6025 && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
6026 symbol = 0;
6027 else if (strcmp (h->root.root.root.string, "_DYNAMIC_LINK") == 0 ||
6028 strcmp (h->root.root.root.string, "_DYNAMIC_LINKING") == 0)
6030 /* If this is a dynamic link, we should have created a
6031 _DYNAMIC_LINK symbol or _DYNAMIC_LINKING(for normal mips) symbol
6032 in in mips_elf_create_dynamic_sections.
6033 Otherwise, we should define the symbol with a value of 0.
6034 FIXME: It should probably get into the symbol table
6035 somehow as well. */
6036 BFD_ASSERT (! info->shared);
6037 BFD_ASSERT (bfd_get_section_by_name (abfd, ".dynamic") == NULL);
6038 symbol = 0;
6040 else
6042 if (! ((*info->callbacks->undefined_symbol)
6043 (info, h->root.root.root.string, input_bfd,
6044 input_section, relocation->r_offset,
6045 (!info->shared || info->no_undefined
6046 || ELF_ST_VISIBILITY (h->root.other)))))
6047 return bfd_reloc_undefined;
6048 symbol = 0;
6051 target_is_16_bit_code_p = (h->root.other == STO_MIPS16);
6054 /* If this is a 32-bit call to a 16-bit function with a stub, we
6055 need to redirect the call to the stub, unless we're already *in*
6056 a stub. */
6057 if (r_type != R_MIPS16_26 && !info->relocateable
6058 && ((h != NULL && h->fn_stub != NULL)
6059 || (local_p && elf_tdata (input_bfd)->local_stubs != NULL
6060 && elf_tdata (input_bfd)->local_stubs[r_symndx] != NULL))
6061 && !mips_elf_stub_section_p (input_bfd, input_section))
6063 /* This is a 32-bit call to a 16-bit function. We should
6064 have already noticed that we were going to need the
6065 stub. */
6066 if (local_p)
6067 sec = elf_tdata (input_bfd)->local_stubs[r_symndx];
6068 else
6070 BFD_ASSERT (h->need_fn_stub);
6071 sec = h->fn_stub;
6074 symbol = sec->output_section->vma + sec->output_offset;
6076 /* If this is a 16-bit call to a 32-bit function with a stub, we
6077 need to redirect the call to the stub. */
6078 else if (r_type == R_MIPS16_26 && !info->relocateable
6079 && h != NULL
6080 && (h->call_stub != NULL || h->call_fp_stub != NULL)
6081 && !target_is_16_bit_code_p)
6083 /* If both call_stub and call_fp_stub are defined, we can figure
6084 out which one to use by seeing which one appears in the input
6085 file. */
6086 if (h->call_stub != NULL && h->call_fp_stub != NULL)
6088 asection *o;
6090 sec = NULL;
6091 for (o = input_bfd->sections; o != NULL; o = o->next)
6093 if (strncmp (bfd_get_section_name (input_bfd, o),
6094 CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0)
6096 sec = h->call_fp_stub;
6097 break;
6100 if (sec == NULL)
6101 sec = h->call_stub;
6103 else if (h->call_stub != NULL)
6104 sec = h->call_stub;
6105 else
6106 sec = h->call_fp_stub;
6108 BFD_ASSERT (sec->_raw_size > 0);
6109 symbol = sec->output_section->vma + sec->output_offset;
6112 /* Calls from 16-bit code to 32-bit code and vice versa require the
6113 special jalx instruction. */
6114 *require_jalxp = (!info->relocateable
6115 && ((r_type == R_MIPS16_26) != target_is_16_bit_code_p));
6117 local_p = mips_elf_local_relocation_p (input_bfd, relocation,
6118 local_sections, true);
6120 /* If we haven't already determined the GOT offset, or the GP value,
6121 and we're going to need it, get it now. */
6122 switch (r_type)
6124 case R_MIPS_CALL16:
6125 case R_MIPS_GOT16:
6126 case R_MIPS_GOT_DISP:
6127 case R_MIPS_GOT_HI16:
6128 case R_MIPS_CALL_HI16:
6129 case R_MIPS_GOT_LO16:
6130 case R_MIPS_CALL_LO16:
6131 /* Find the index into the GOT where this value is located. */
6132 if (!local_p)
6134 BFD_ASSERT (addend == 0);
6135 g = mips_elf_global_got_index
6136 (elf_hash_table (info)->dynobj,
6137 (struct elf_link_hash_entry*) h);
6138 if (! elf_hash_table(info)->dynamic_sections_created
6139 || (info->shared
6140 && (info->symbolic || h->root.dynindx == -1)
6141 && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
6143 /* This is a static link or a -Bsymbolic link. The
6144 symbol is defined locally, or was forced to be local.
6145 We must initialize this entry in the GOT. */
6146 asection *sgot = mips_elf_got_section(elf_hash_table
6147 (info)->dynobj);
6148 MIPS_ELF_PUT_WORD (elf_hash_table (info)->dynobj,
6149 symbol + addend, sgot->contents + g);
6152 else if (r_type == R_MIPS_GOT16)
6153 /* There's no need to create a local GOT entry here; the
6154 calculation for a local GOT16 entry does not involve G. */
6155 break;
6156 else
6158 g = mips_elf_local_got_index (abfd, info, symbol + addend);
6159 if (g == (bfd_vma) -1)
6160 return false;
6163 /* Convert GOT indices to actual offsets. */
6164 g = mips_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
6165 abfd, g);
6166 break;
6168 case R_MIPS_HI16:
6169 case R_MIPS_LO16:
6170 case R_MIPS_GPREL16:
6171 case R_MIPS_GPREL32:
6172 case R_MIPS_LITERAL:
6173 gp0 = _bfd_get_gp_value (input_bfd);
6174 gp = _bfd_get_gp_value (abfd);
6175 break;
6177 default:
6178 break;
6181 /* Figure out what kind of relocation is being performed. */
6182 switch (r_type)
6184 case R_MIPS_NONE:
6185 return bfd_reloc_continue;
6187 case R_MIPS_16:
6188 value = symbol + mips_elf_sign_extend (addend, 16);
6189 overflowed_p = mips_elf_overflow_p (value, 16);
6190 break;
6192 case R_MIPS_32:
6193 case R_MIPS_REL32:
6194 case R_MIPS_64:
6195 if ((info->shared
6196 || (elf_hash_table (info)->dynamic_sections_created
6197 && h != NULL
6198 && ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)
6199 != 0)))
6200 && (input_section->flags & SEC_ALLOC) != 0)
6202 /* If we're creating a shared library, or this relocation is
6203 against a symbol in a shared library, then we can't know
6204 where the symbol will end up. So, we create a relocation
6205 record in the output, and leave the job up to the dynamic
6206 linker. */
6207 value = addend;
6208 if (!mips_elf_create_dynamic_relocation (abfd,
6209 info,
6210 relocation,
6212 sec,
6213 symbol,
6214 &value,
6215 input_section))
6216 return false;
6218 else
6220 if (r_type != R_MIPS_REL32)
6221 value = symbol + addend;
6222 else
6223 value = addend;
6225 value &= howto->dst_mask;
6226 break;
6228 case R_MIPS_PC32:
6229 case R_MIPS_PC64:
6230 case R_MIPS_GNU_REL_LO16:
6231 value = symbol + addend - p;
6232 value &= howto->dst_mask;
6233 break;
6235 case R_MIPS_GNU_REL16_S2:
6236 value = symbol + mips_elf_sign_extend (addend << 2, 18) - p;
6237 overflowed_p = mips_elf_overflow_p (value, 18);
6238 value = (value >> 2) & howto->dst_mask;
6239 break;
6241 case R_MIPS_GNU_REL_HI16:
6242 value = mips_elf_high (addend + symbol - p);
6243 value &= howto->dst_mask;
6244 break;
6246 case R_MIPS16_26:
6247 /* The calculation for R_MIPS_26 is just the same as for an
6248 R_MIPS_26. It's only the storage of the relocated field into
6249 the output file that's different. That's handled in
6250 mips_elf_perform_relocation. So, we just fall through to the
6251 R_MIPS_26 case here. */
6252 case R_MIPS_26:
6253 if (local_p)
6254 value = (((addend << 2) | (p & 0xf0000000)) + symbol) >> 2;
6255 else
6256 value = (mips_elf_sign_extend (addend << 2, 28) + symbol) >> 2;
6257 value &= howto->dst_mask;
6258 break;
6260 case R_MIPS_HI16:
6261 if (!gp_disp_p)
6263 value = mips_elf_high (addend + symbol);
6264 value &= howto->dst_mask;
6266 else
6268 value = mips_elf_high (addend + gp - p);
6269 overflowed_p = mips_elf_overflow_p (value, 16);
6271 break;
6273 case R_MIPS_LO16:
6274 if (!gp_disp_p)
6275 value = (symbol + addend) & howto->dst_mask;
6276 else
6278 value = addend + gp - p + 4;
6279 /* The MIPS ABI requires checking the R_MIPS_LO16 relocation
6280 for overflow. But, on, say, Irix 5, relocations against
6281 _gp_disp are normally generated from the .cpload
6282 pseudo-op. It generates code that normally looks like
6283 this:
6285 lui $gp,%hi(_gp_disp)
6286 addiu $gp,$gp,%lo(_gp_disp)
6287 addu $gp,$gp,$t9
6289 Here $t9 holds the address of the function being called,
6290 as required by the MIPS ELF ABI. The R_MIPS_LO16
6291 relocation can easily overflow in this situation, but the
6292 R_MIPS_HI16 relocation will handle the overflow.
6293 Therefore, we consider this a bug in the MIPS ABI, and do
6294 not check for overflow here. */
6296 break;
6298 case R_MIPS_LITERAL:
6299 /* Because we don't merge literal sections, we can handle this
6300 just like R_MIPS_GPREL16. In the long run, we should merge
6301 shared literals, and then we will need to additional work
6302 here. */
6304 /* Fall through. */
6306 case R_MIPS16_GPREL:
6307 /* The R_MIPS16_GPREL performs the same calculation as
6308 R_MIPS_GPREL16, but stores the relocated bits in a different
6309 order. We don't need to do anything special here; the
6310 differences are handled in mips_elf_perform_relocation. */
6311 case R_MIPS_GPREL16:
6312 if (local_p)
6313 value = mips_elf_sign_extend (addend, 16) + symbol + gp0 - gp;
6314 else
6315 value = mips_elf_sign_extend (addend, 16) + symbol - gp;
6316 overflowed_p = mips_elf_overflow_p (value, 16);
6317 break;
6319 case R_MIPS_GOT16:
6320 if (local_p)
6322 boolean forced;
6324 /* The special case is when the symbol is forced to be local. We
6325 need the full address in the GOT since no R_MIPS_LO16 relocation
6326 follows. */
6327 forced = ! mips_elf_local_relocation_p (input_bfd, relocation,
6328 local_sections, false);
6329 value = mips_elf_got16_entry (abfd, info, symbol + addend, forced);
6330 if (value == (bfd_vma) -1)
6331 return false;
6332 value
6333 = mips_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
6334 abfd,
6335 value);
6336 overflowed_p = mips_elf_overflow_p (value, 16);
6337 break;
6340 /* Fall through. */
6342 case R_MIPS_CALL16:
6343 case R_MIPS_GOT_DISP:
6344 value = g;
6345 overflowed_p = mips_elf_overflow_p (value, 16);
6346 break;
6348 case R_MIPS_GPREL32:
6349 value = (addend + symbol + gp0 - gp) & howto->dst_mask;
6350 break;
6352 case R_MIPS_PC16:
6353 value = mips_elf_sign_extend (addend, 16) + symbol - p;
6354 value = (bfd_vma) ((bfd_signed_vma) value / 4);
6355 overflowed_p = mips_elf_overflow_p (value, 16);
6356 break;
6358 case R_MIPS_GOT_HI16:
6359 case R_MIPS_CALL_HI16:
6360 /* We're allowed to handle these two relocations identically.
6361 The dynamic linker is allowed to handle the CALL relocations
6362 differently by creating a lazy evaluation stub. */
6363 value = g;
6364 value = mips_elf_high (value);
6365 value &= howto->dst_mask;
6366 break;
6368 case R_MIPS_GOT_LO16:
6369 case R_MIPS_CALL_LO16:
6370 value = g & howto->dst_mask;
6371 break;
6373 case R_MIPS_GOT_PAGE:
6374 value = mips_elf_got_page (abfd, info, symbol + addend, NULL);
6375 if (value == (bfd_vma) -1)
6376 return false;
6377 value = mips_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
6378 abfd,
6379 value);
6380 overflowed_p = mips_elf_overflow_p (value, 16);
6381 break;
6383 case R_MIPS_GOT_OFST:
6384 mips_elf_got_page (abfd, info, symbol + addend, &value);
6385 overflowed_p = mips_elf_overflow_p (value, 16);
6386 break;
6388 case R_MIPS_SUB:
6389 value = symbol - addend;
6390 value &= howto->dst_mask;
6391 break;
6393 case R_MIPS_HIGHER:
6394 value = mips_elf_higher (addend + symbol);
6395 value &= howto->dst_mask;
6396 break;
6398 case R_MIPS_HIGHEST:
6399 value = mips_elf_highest (addend + symbol);
6400 value &= howto->dst_mask;
6401 break;
6403 case R_MIPS_SCN_DISP:
6404 value = symbol + addend - sec->output_offset;
6405 value &= howto->dst_mask;
6406 break;
6408 case R_MIPS_PJUMP:
6409 case R_MIPS_JALR:
6410 /* Both of these may be ignored. R_MIPS_JALR is an optimization
6411 hint; we could improve performance by honoring that hint. */
6412 return bfd_reloc_continue;
6414 case R_MIPS_GNU_VTINHERIT:
6415 case R_MIPS_GNU_VTENTRY:
6416 /* We don't do anything with these at present. */
6417 return bfd_reloc_continue;
6419 default:
6420 /* An unrecognized relocation type. */
6421 return bfd_reloc_notsupported;
6424 /* Store the VALUE for our caller. */
6425 *valuep = value;
6426 return overflowed_p ? bfd_reloc_overflow : bfd_reloc_ok;
6429 /* Obtain the field relocated by RELOCATION. */
6431 static bfd_vma
6432 mips_elf_obtain_contents (howto, relocation, input_bfd, contents)
6433 reloc_howto_type *howto;
6434 const Elf_Internal_Rela *relocation;
6435 bfd *input_bfd;
6436 bfd_byte *contents;
6438 bfd_vma x;
6439 bfd_byte *location = contents + relocation->r_offset;
6441 /* Obtain the bytes. */
6442 x = bfd_get (8 * bfd_get_reloc_size (howto), input_bfd, location);
6444 if ((ELF32_R_TYPE (relocation->r_info) == R_MIPS16_26
6445 || ELF32_R_TYPE (relocation->r_info) == R_MIPS16_GPREL)
6446 && bfd_little_endian (input_bfd))
6447 /* The two 16-bit words will be reversed on a little-endian
6448 system. See mips_elf_perform_relocation for more details. */
6449 x = (((x & 0xffff) << 16) | ((x & 0xffff0000) >> 16));
6451 return x;
6454 /* It has been determined that the result of the RELOCATION is the
6455 VALUE. Use HOWTO to place VALUE into the output file at the
6456 appropriate position. The SECTION is the section to which the
6457 relocation applies. If REQUIRE_JALX is true, then the opcode used
6458 for the relocation must be either JAL or JALX, and it is
6459 unconditionally converted to JALX.
6461 Returns false if anything goes wrong. */
6463 static boolean
6464 mips_elf_perform_relocation (info, howto, relocation, value,
6465 input_bfd, input_section,
6466 contents, require_jalx)
6467 struct bfd_link_info *info;
6468 reloc_howto_type *howto;
6469 const Elf_Internal_Rela *relocation;
6470 bfd_vma value;
6471 bfd *input_bfd;
6472 asection *input_section;
6473 bfd_byte *contents;
6474 boolean require_jalx;
6476 bfd_vma x;
6477 bfd_byte *location;
6478 int r_type = ELF32_R_TYPE (relocation->r_info);
6480 /* Figure out where the relocation is occurring. */
6481 location = contents + relocation->r_offset;
6483 /* Obtain the current value. */
6484 x = mips_elf_obtain_contents (howto, relocation, input_bfd, contents);
6486 /* Clear the field we are setting. */
6487 x &= ~howto->dst_mask;
6489 /* If this is the R_MIPS16_26 relocation, we must store the
6490 value in a funny way. */
6491 if (r_type == R_MIPS16_26)
6493 /* R_MIPS16_26 is used for the mips16 jal and jalx instructions.
6494 Most mips16 instructions are 16 bits, but these instructions
6495 are 32 bits.
6497 The format of these instructions is:
6499 +--------------+--------------------------------+
6500 ! JALX ! X! Imm 20:16 ! Imm 25:21 !
6501 +--------------+--------------------------------+
6502 ! Immediate 15:0 !
6503 +-----------------------------------------------+
6505 JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx.
6506 Note that the immediate value in the first word is swapped.
6508 When producing a relocateable object file, R_MIPS16_26 is
6509 handled mostly like R_MIPS_26. In particular, the addend is
6510 stored as a straight 26-bit value in a 32-bit instruction.
6511 (gas makes life simpler for itself by never adjusting a
6512 R_MIPS16_26 reloc to be against a section, so the addend is
6513 always zero). However, the 32 bit instruction is stored as 2
6514 16-bit values, rather than a single 32-bit value. In a
6515 big-endian file, the result is the same; in a little-endian
6516 file, the two 16-bit halves of the 32 bit value are swapped.
6517 This is so that a disassembler can recognize the jal
6518 instruction.
6520 When doing a final link, R_MIPS16_26 is treated as a 32 bit
6521 instruction stored as two 16-bit values. The addend A is the
6522 contents of the targ26 field. The calculation is the same as
6523 R_MIPS_26. When storing the calculated value, reorder the
6524 immediate value as shown above, and don't forget to store the
6525 value as two 16-bit values.
6527 To put it in MIPS ABI terms, the relocation field is T-targ26-16,
6528 defined as
6530 big-endian:
6531 +--------+----------------------+
6532 | | |
6533 | | targ26-16 |
6534 |31 26|25 0|
6535 +--------+----------------------+
6537 little-endian:
6538 +----------+------+-------------+
6539 | | | |
6540 | sub1 | | sub2 |
6541 |0 9|10 15|16 31|
6542 +----------+--------------------+
6543 where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is
6544 ((sub1 << 16) | sub2)).
6546 When producing a relocateable object file, the calculation is
6547 (((A < 2) | (P & 0xf0000000) + S) >> 2)
6548 When producing a fully linked file, the calculation is
6549 let R = (((A < 2) | (P & 0xf0000000) + S) >> 2)
6550 ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff) */
6552 if (!info->relocateable)
6553 /* Shuffle the bits according to the formula above. */
6554 value = (((value & 0x1f0000) << 5)
6555 | ((value & 0x3e00000) >> 5)
6556 | (value & 0xffff));
6559 else if (r_type == R_MIPS16_GPREL)
6561 /* R_MIPS16_GPREL is used for GP-relative addressing in mips16
6562 mode. A typical instruction will have a format like this:
6564 +--------------+--------------------------------+
6565 ! EXTEND ! Imm 10:5 ! Imm 15:11 !
6566 +--------------+--------------------------------+
6567 ! Major ! rx ! ry ! Imm 4:0 !
6568 +--------------+--------------------------------+
6570 EXTEND is the five bit value 11110. Major is the instruction
6571 opcode.
6573 This is handled exactly like R_MIPS_GPREL16, except that the
6574 addend is retrieved and stored as shown in this diagram; that
6575 is, the Imm fields above replace the V-rel16 field.
6577 All we need to do here is shuffle the bits appropriately. As
6578 above, the two 16-bit halves must be swapped on a
6579 little-endian system. */
6580 value = (((value & 0x7e0) << 16)
6581 | ((value & 0xf800) << 5)
6582 | (value & 0x1f));
6585 /* Set the field. */
6586 x |= (value & howto->dst_mask);
6588 /* If required, turn JAL into JALX. */
6589 if (require_jalx)
6591 boolean ok;
6592 bfd_vma opcode = x >> 26;
6593 bfd_vma jalx_opcode;
6595 /* Check to see if the opcode is already JAL or JALX. */
6596 if (r_type == R_MIPS16_26)
6598 ok = ((opcode == 0x6) || (opcode == 0x7));
6599 jalx_opcode = 0x7;
6601 else
6603 ok = ((opcode == 0x3) || (opcode == 0x1d));
6604 jalx_opcode = 0x1d;
6607 /* If the opcode is not JAL or JALX, there's a problem. */
6608 if (!ok)
6610 (*_bfd_error_handler)
6611 (_("%s: %s+0x%lx: jump to stub routine which is not jal"),
6612 bfd_get_filename (input_bfd),
6613 input_section->name,
6614 (unsigned long) relocation->r_offset);
6615 bfd_set_error (bfd_error_bad_value);
6616 return false;
6619 /* Make this the JALX opcode. */
6620 x = (x & ~(0x3f << 26)) | (jalx_opcode << 26);
6623 /* Swap the high- and low-order 16 bits on little-endian systems
6624 when doing a MIPS16 relocation. */
6625 if ((r_type == R_MIPS16_GPREL || r_type == R_MIPS16_26)
6626 && bfd_little_endian (input_bfd))
6627 x = (((x & 0xffff) << 16) | ((x & 0xffff0000) >> 16));
6629 /* Put the value into the output. */
6630 bfd_put (8 * bfd_get_reloc_size (howto), input_bfd, x, location);
6631 return true;
6634 /* Returns true if SECTION is a MIPS16 stub section. */
6636 static boolean
6637 mips_elf_stub_section_p (abfd, section)
6638 bfd *abfd ATTRIBUTE_UNUSED;
6639 asection *section;
6641 const char *name = bfd_get_section_name (abfd, section);
6643 return (strncmp (name, FN_STUB, sizeof FN_STUB - 1) == 0
6644 || strncmp (name, CALL_STUB, sizeof CALL_STUB - 1) == 0
6645 || strncmp (name, CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0);
6648 /* Relocate a MIPS ELF section. */
6650 boolean
6651 _bfd_mips_elf_relocate_section (output_bfd, info, input_bfd, input_section,
6652 contents, relocs, local_syms, local_sections)
6653 bfd *output_bfd;
6654 struct bfd_link_info *info;
6655 bfd *input_bfd;
6656 asection *input_section;
6657 bfd_byte *contents;
6658 Elf_Internal_Rela *relocs;
6659 Elf_Internal_Sym *local_syms;
6660 asection **local_sections;
6662 Elf_Internal_Rela *rel;
6663 const Elf_Internal_Rela *relend;
6664 bfd_vma addend = 0;
6665 boolean use_saved_addend_p = false;
6666 struct elf_backend_data *bed;
6668 bed = get_elf_backend_data (output_bfd);
6669 relend = relocs + input_section->reloc_count * bed->s->int_rels_per_ext_rel;
6670 for (rel = relocs; rel < relend; ++rel)
6672 const char *name;
6673 bfd_vma value;
6674 reloc_howto_type *howto;
6675 boolean require_jalx;
6676 /* True if the relocation is a RELA relocation, rather than a
6677 REL relocation. */
6678 boolean rela_relocation_p = true;
6679 int r_type = ELF32_R_TYPE (rel->r_info);
6681 /* Find the relocation howto for this relocation. */
6682 if (r_type == R_MIPS_64 && !ABI_64_P (output_bfd))
6684 /* Some 32-bit code uses R_MIPS_64. In particular, people use
6685 64-bit code, but make sure all their addresses are in the
6686 lowermost or uppermost 32-bit section of the 64-bit address
6687 space. Thus, when they use an R_MIPS_64 they mean what is
6688 usually meant by R_MIPS_32, with the exception that the
6689 stored value is sign-extended to 64 bits. */
6690 howto = elf_mips_howto_table + R_MIPS_32;
6692 /* On big-endian systems, we need to lie about the position
6693 of the reloc. */
6694 if (bfd_big_endian (input_bfd))
6695 rel->r_offset += 4;
6697 else
6698 howto = mips_rtype_to_howto (r_type);
6700 if (!use_saved_addend_p)
6702 Elf_Internal_Shdr *rel_hdr;
6704 /* If these relocations were originally of the REL variety,
6705 we must pull the addend out of the field that will be
6706 relocated. Otherwise, we simply use the contents of the
6707 RELA relocation. To determine which flavor or relocation
6708 this is, we depend on the fact that the INPUT_SECTION's
6709 REL_HDR is read before its REL_HDR2. */
6710 rel_hdr = &elf_section_data (input_section)->rel_hdr;
6711 if ((size_t) (rel - relocs)
6712 >= (rel_hdr->sh_size / rel_hdr->sh_entsize
6713 * bed->s->int_rels_per_ext_rel))
6714 rel_hdr = elf_section_data (input_section)->rel_hdr2;
6715 if (rel_hdr->sh_entsize == MIPS_ELF_REL_SIZE (input_bfd))
6717 /* Note that this is a REL relocation. */
6718 rela_relocation_p = false;
6720 /* Get the addend, which is stored in the input file. */
6721 addend = mips_elf_obtain_contents (howto,
6722 rel,
6723 input_bfd,
6724 contents);
6725 addend &= howto->src_mask;
6727 /* For some kinds of relocations, the ADDEND is a
6728 combination of the addend stored in two different
6729 relocations. */
6730 if (r_type == R_MIPS_HI16
6731 || r_type == R_MIPS_GNU_REL_HI16
6732 || (r_type == R_MIPS_GOT16
6733 && mips_elf_local_relocation_p (input_bfd, rel,
6734 local_sections, false)))
6736 bfd_vma l;
6737 const Elf_Internal_Rela *lo16_relocation;
6738 reloc_howto_type *lo16_howto;
6739 int lo;
6741 /* The combined value is the sum of the HI16 addend,
6742 left-shifted by sixteen bits, and the LO16
6743 addend, sign extended. (Usually, the code does
6744 a `lui' of the HI16 value, and then an `addiu' of
6745 the LO16 value.)
6747 Scan ahead to find a matching LO16 relocation. */
6748 if (r_type == R_MIPS_GNU_REL_HI16)
6749 lo = R_MIPS_GNU_REL_LO16;
6750 else
6751 lo = R_MIPS_LO16;
6752 lo16_relocation
6753 = mips_elf_next_relocation (lo, rel, relend);
6754 if (lo16_relocation == NULL)
6755 return false;
6757 /* Obtain the addend kept there. */
6758 lo16_howto = mips_rtype_to_howto (lo);
6759 l = mips_elf_obtain_contents (lo16_howto,
6760 lo16_relocation,
6761 input_bfd, contents);
6762 l &= lo16_howto->src_mask;
6763 l = mips_elf_sign_extend (l, 16);
6765 addend <<= 16;
6767 /* Compute the combined addend. */
6768 addend += l;
6770 else if (r_type == R_MIPS16_GPREL)
6772 /* The addend is scrambled in the object file. See
6773 mips_elf_perform_relocation for details on the
6774 format. */
6775 addend = (((addend & 0x1f0000) >> 5)
6776 | ((addend & 0x7e00000) >> 16)
6777 | (addend & 0x1f));
6780 else
6781 addend = rel->r_addend;
6784 if (info->relocateable)
6786 Elf_Internal_Sym *sym;
6787 unsigned long r_symndx;
6789 if (r_type == R_MIPS_64 && !ABI_64_P (output_bfd)
6790 && bfd_big_endian (input_bfd))
6791 rel->r_offset -= 4;
6793 /* Since we're just relocating, all we need to do is copy
6794 the relocations back out to the object file, unless
6795 they're against a section symbol, in which case we need
6796 to adjust by the section offset, or unless they're GP
6797 relative in which case we need to adjust by the amount
6798 that we're adjusting GP in this relocateable object. */
6800 if (!mips_elf_local_relocation_p (input_bfd, rel, local_sections,
6801 false))
6802 /* There's nothing to do for non-local relocations. */
6803 continue;
6805 if (r_type == R_MIPS16_GPREL
6806 || r_type == R_MIPS_GPREL16
6807 || r_type == R_MIPS_GPREL32
6808 || r_type == R_MIPS_LITERAL)
6809 addend -= (_bfd_get_gp_value (output_bfd)
6810 - _bfd_get_gp_value (input_bfd));
6811 else if (r_type == R_MIPS_26 || r_type == R_MIPS16_26
6812 || r_type == R_MIPS_GNU_REL16_S2)
6813 /* The addend is stored without its two least
6814 significant bits (which are always zero.) In a
6815 non-relocateable link, calculate_relocation will do
6816 this shift; here, we must do it ourselves. */
6817 addend <<= 2;
6819 r_symndx = ELF32_R_SYM (rel->r_info);
6820 sym = local_syms + r_symndx;
6821 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
6822 /* Adjust the addend appropriately. */
6823 addend += local_sections[r_symndx]->output_offset;
6825 /* If the relocation is for a R_MIPS_HI16 or R_MIPS_GOT16,
6826 then we only want to write out the high-order 16 bits.
6827 The subsequent R_MIPS_LO16 will handle the low-order bits. */
6828 if (r_type == R_MIPS_HI16 || r_type == R_MIPS_GOT16
6829 || r_type == R_MIPS_GNU_REL_HI16)
6830 addend = mips_elf_high (addend);
6831 /* If the relocation is for an R_MIPS_26 relocation, then
6832 the two low-order bits are not stored in the object file;
6833 they are implicitly zero. */
6834 else if (r_type == R_MIPS_26 || r_type == R_MIPS16_26
6835 || r_type == R_MIPS_GNU_REL16_S2)
6836 addend >>= 2;
6838 if (rela_relocation_p)
6839 /* If this is a RELA relocation, just update the addend.
6840 We have to cast away constness for REL. */
6841 rel->r_addend = addend;
6842 else
6844 /* Otherwise, we have to write the value back out. Note
6845 that we use the source mask, rather than the
6846 destination mask because the place to which we are
6847 writing will be source of the addend in the final
6848 link. */
6849 addend &= howto->src_mask;
6851 if (r_type == R_MIPS_64 && !ABI_64_P (output_bfd))
6852 /* See the comment above about using R_MIPS_64 in the 32-bit
6853 ABI. Here, we need to update the addend. It would be
6854 possible to get away with just using the R_MIPS_32 reloc
6855 but for endianness. */
6857 bfd_vma sign_bits;
6858 bfd_vma low_bits;
6859 bfd_vma high_bits;
6861 if (addend & ((bfd_vma) 1 << 31))
6862 sign_bits = ((bfd_vma) 1 << 32) - 1;
6863 else
6864 sign_bits = 0;
6866 /* If we don't know that we have a 64-bit type,
6867 do two separate stores. */
6868 if (bfd_big_endian (input_bfd))
6870 /* Store the sign-bits (which are most significant)
6871 first. */
6872 low_bits = sign_bits;
6873 high_bits = addend;
6875 else
6877 low_bits = addend;
6878 high_bits = sign_bits;
6880 bfd_put_32 (input_bfd, low_bits,
6881 contents + rel->r_offset);
6882 bfd_put_32 (input_bfd, high_bits,
6883 contents + rel->r_offset + 4);
6884 continue;
6887 if (!mips_elf_perform_relocation (info, howto, rel, addend,
6888 input_bfd, input_section,
6889 contents, false))
6890 return false;
6893 /* Go on to the next relocation. */
6894 continue;
6897 /* In the N32 and 64-bit ABIs there may be multiple consecutive
6898 relocations for the same offset. In that case we are
6899 supposed to treat the output of each relocation as the addend
6900 for the next. */
6901 if (rel + 1 < relend
6902 && rel->r_offset == rel[1].r_offset
6903 && ELF32_R_TYPE (rel[1].r_info) != R_MIPS_NONE)
6904 use_saved_addend_p = true;
6905 else
6906 use_saved_addend_p = false;
6908 /* Figure out what value we are supposed to relocate. */
6909 switch (mips_elf_calculate_relocation (output_bfd,
6910 input_bfd,
6911 input_section,
6912 info,
6913 rel,
6914 addend,
6915 howto,
6916 local_syms,
6917 local_sections,
6918 &value,
6919 &name,
6920 &require_jalx))
6922 case bfd_reloc_continue:
6923 /* There's nothing to do. */
6924 continue;
6926 case bfd_reloc_undefined:
6927 /* mips_elf_calculate_relocation already called the
6928 undefined_symbol callback. There's no real point in
6929 trying to perform the relocation at this point, so we
6930 just skip ahead to the next relocation. */
6931 continue;
6933 case bfd_reloc_notsupported:
6934 abort ();
6935 break;
6937 case bfd_reloc_overflow:
6938 if (use_saved_addend_p)
6939 /* Ignore overflow until we reach the last relocation for
6940 a given location. */
6942 else
6944 BFD_ASSERT (name != NULL);
6945 if (! ((*info->callbacks->reloc_overflow)
6946 (info, name, howto->name, (bfd_vma) 0,
6947 input_bfd, input_section, rel->r_offset)))
6948 return false;
6950 break;
6952 case bfd_reloc_ok:
6953 break;
6955 default:
6956 abort ();
6957 break;
6960 /* If we've got another relocation for the address, keep going
6961 until we reach the last one. */
6962 if (use_saved_addend_p)
6964 addend = value;
6965 continue;
6968 if (r_type == R_MIPS_64 && !ABI_64_P (output_bfd))
6969 /* See the comment above about using R_MIPS_64 in the 32-bit
6970 ABI. Until now, we've been using the HOWTO for R_MIPS_32;
6971 that calculated the right value. Now, however, we
6972 sign-extend the 32-bit result to 64-bits, and store it as a
6973 64-bit value. We are especially generous here in that we
6974 go to extreme lengths to support this usage on systems with
6975 only a 32-bit VMA. */
6977 bfd_vma sign_bits;
6978 bfd_vma low_bits;
6979 bfd_vma high_bits;
6981 if (value & ((bfd_vma) 1 << 31))
6982 sign_bits = ((bfd_vma) 1 << 32) - 1;
6983 else
6984 sign_bits = 0;
6986 /* If we don't know that we have a 64-bit type,
6987 do two separate stores. */
6988 if (bfd_big_endian (input_bfd))
6990 /* Undo what we did above. */
6991 rel->r_offset -= 4;
6992 /* Store the sign-bits (which are most significant)
6993 first. */
6994 low_bits = sign_bits;
6995 high_bits = value;
6997 else
6999 low_bits = value;
7000 high_bits = sign_bits;
7002 bfd_put_32 (input_bfd, low_bits,
7003 contents + rel->r_offset);
7004 bfd_put_32 (input_bfd, high_bits,
7005 contents + rel->r_offset + 4);
7006 continue;
7009 /* Actually perform the relocation. */
7010 if (!mips_elf_perform_relocation (info, howto, rel, value, input_bfd,
7011 input_section, contents,
7012 require_jalx))
7013 return false;
7016 return true;
7019 /* This hook function is called before the linker writes out a global
7020 symbol. We mark symbols as small common if appropriate. This is
7021 also where we undo the increment of the value for a mips16 symbol. */
7023 /*ARGSIGNORED*/
7024 boolean
7025 _bfd_mips_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec)
7026 bfd *abfd ATTRIBUTE_UNUSED;
7027 struct bfd_link_info *info ATTRIBUTE_UNUSED;
7028 const char *name ATTRIBUTE_UNUSED;
7029 Elf_Internal_Sym *sym;
7030 asection *input_sec;
7032 /* If we see a common symbol, which implies a relocatable link, then
7033 if a symbol was small common in an input file, mark it as small
7034 common in the output file. */
7035 if (sym->st_shndx == SHN_COMMON
7036 && strcmp (input_sec->name, ".scommon") == 0)
7037 sym->st_shndx = SHN_MIPS_SCOMMON;
7039 if (sym->st_other == STO_MIPS16
7040 && (sym->st_value & 1) != 0)
7041 --sym->st_value;
7043 return true;
7046 /* Functions for the dynamic linker. */
7048 /* The name of the dynamic interpreter. This is put in the .interp
7049 section. */
7051 #define ELF_DYNAMIC_INTERPRETER(abfd) \
7052 (ABI_N32_P (abfd) ? "/usr/lib32/libc.so.1" \
7053 : ABI_64_P (abfd) ? "/usr/lib64/libc.so.1" \
7054 : "/usr/lib/libc.so.1")
7056 /* Create dynamic sections when linking against a dynamic object. */
7058 boolean
7059 _bfd_mips_elf_create_dynamic_sections (abfd, info)
7060 bfd *abfd;
7061 struct bfd_link_info *info;
7063 struct elf_link_hash_entry *h;
7064 flagword flags;
7065 register asection *s;
7066 const char * const *namep;
7068 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
7069 | SEC_LINKER_CREATED | SEC_READONLY);
7071 /* Mips ABI requests the .dynamic section to be read only. */
7072 s = bfd_get_section_by_name (abfd, ".dynamic");
7073 if (s != NULL)
7075 if (! bfd_set_section_flags (abfd, s, flags))
7076 return false;
7079 /* We need to create .got section. */
7080 if (! mips_elf_create_got_section (abfd, info))
7081 return false;
7083 /* Create the .msym section on IRIX6. It is used by the dynamic
7084 linker to speed up dynamic relocations, and to avoid computing
7085 the ELF hash for symbols. */
7086 if (IRIX_COMPAT (abfd) == ict_irix6
7087 && !mips_elf_create_msym_section (abfd))
7088 return false;
7090 /* Create .stub section. */
7091 if (bfd_get_section_by_name (abfd,
7092 MIPS_ELF_STUB_SECTION_NAME (abfd)) == NULL)
7094 s = bfd_make_section (abfd, MIPS_ELF_STUB_SECTION_NAME (abfd));
7095 if (s == NULL
7096 || ! bfd_set_section_flags (abfd, s, flags | SEC_CODE)
7097 || ! bfd_set_section_alignment (abfd, s,
7098 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
7099 return false;
7102 if ((IRIX_COMPAT (abfd) == ict_irix5 || IRIX_COMPAT (abfd) == ict_none)
7103 && !info->shared
7104 && bfd_get_section_by_name (abfd, ".rld_map") == NULL)
7106 s = bfd_make_section (abfd, ".rld_map");
7107 if (s == NULL
7108 || ! bfd_set_section_flags (abfd, s, flags & ~SEC_READONLY)
7109 || ! bfd_set_section_alignment (abfd, s,
7110 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
7111 return false;
7114 /* On IRIX5, we adjust add some additional symbols and change the
7115 alignments of several sections. There is no ABI documentation
7116 indicating that this is necessary on IRIX6, nor any evidence that
7117 the linker takes such action. */
7118 if (IRIX_COMPAT (abfd) == ict_irix5)
7120 for (namep = mips_elf_dynsym_rtproc_names; *namep != NULL; namep++)
7122 h = NULL;
7123 if (! (_bfd_generic_link_add_one_symbol
7124 (info, abfd, *namep, BSF_GLOBAL, bfd_und_section_ptr,
7125 (bfd_vma) 0, (const char *) NULL, false,
7126 get_elf_backend_data (abfd)->collect,
7127 (struct bfd_link_hash_entry **) &h)))
7128 return false;
7129 h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
7130 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
7131 h->type = STT_SECTION;
7133 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
7134 return false;
7137 /* We need to create a .compact_rel section. */
7138 if (SGI_COMPAT (abfd))
7140 if (!mips_elf_create_compact_rel_section (abfd, info))
7141 return false;
7144 /* Change aligments of some sections. */
7145 s = bfd_get_section_by_name (abfd, ".hash");
7146 if (s != NULL)
7147 bfd_set_section_alignment (abfd, s, 4);
7148 s = bfd_get_section_by_name (abfd, ".dynsym");
7149 if (s != NULL)
7150 bfd_set_section_alignment (abfd, s, 4);
7151 s = bfd_get_section_by_name (abfd, ".dynstr");
7152 if (s != NULL)
7153 bfd_set_section_alignment (abfd, s, 4);
7154 s = bfd_get_section_by_name (abfd, ".reginfo");
7155 if (s != NULL)
7156 bfd_set_section_alignment (abfd, s, 4);
7157 s = bfd_get_section_by_name (abfd, ".dynamic");
7158 if (s != NULL)
7159 bfd_set_section_alignment (abfd, s, 4);
7162 if (!info->shared)
7164 h = NULL;
7165 if (SGI_COMPAT (abfd))
7167 if (!(_bfd_generic_link_add_one_symbol
7168 (info, abfd, "_DYNAMIC_LINK", BSF_GLOBAL, bfd_abs_section_ptr,
7169 (bfd_vma) 0, (const char *) NULL, false,
7170 get_elf_backend_data (abfd)->collect,
7171 (struct bfd_link_hash_entry **) &h)))
7172 return false;
7174 else
7176 /* For normal mips it is _DYNAMIC_LINKING. */
7177 if (!(_bfd_generic_link_add_one_symbol
7178 (info, abfd, "_DYNAMIC_LINKING", BSF_GLOBAL,
7179 bfd_abs_section_ptr, (bfd_vma) 0, (const char *) NULL, false,
7180 get_elf_backend_data (abfd)->collect,
7181 (struct bfd_link_hash_entry **) &h)))
7182 return false;
7184 h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
7185 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
7186 h->type = STT_SECTION;
7188 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
7189 return false;
7191 if (! mips_elf_hash_table (info)->use_rld_obj_head)
7193 /* __rld_map is a four byte word located in the .data section
7194 and is filled in by the rtld to contain a pointer to
7195 the _r_debug structure. Its symbol value will be set in
7196 mips_elf_finish_dynamic_symbol. */
7197 s = bfd_get_section_by_name (abfd, ".rld_map");
7198 BFD_ASSERT (s != NULL);
7200 h = NULL;
7201 if (SGI_COMPAT (abfd))
7203 if (!(_bfd_generic_link_add_one_symbol
7204 (info, abfd, "__rld_map", BSF_GLOBAL, s,
7205 (bfd_vma) 0, (const char *) NULL, false,
7206 get_elf_backend_data (abfd)->collect,
7207 (struct bfd_link_hash_entry **) &h)))
7208 return false;
7210 else
7212 /* For normal mips the symbol is __RLD_MAP. */
7213 if (!(_bfd_generic_link_add_one_symbol
7214 (info, abfd, "__RLD_MAP", BSF_GLOBAL, s,
7215 (bfd_vma) 0, (const char *) NULL, false,
7216 get_elf_backend_data (abfd)->collect,
7217 (struct bfd_link_hash_entry **) &h)))
7218 return false;
7220 h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
7221 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
7222 h->type = STT_OBJECT;
7224 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
7225 return false;
7229 return true;
7232 /* Create the .compact_rel section. */
7234 static boolean
7235 mips_elf_create_compact_rel_section (abfd, info)
7236 bfd *abfd;
7237 struct bfd_link_info *info ATTRIBUTE_UNUSED;
7239 flagword flags;
7240 register asection *s;
7242 if (bfd_get_section_by_name (abfd, ".compact_rel") == NULL)
7244 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED
7245 | SEC_READONLY);
7247 s = bfd_make_section (abfd, ".compact_rel");
7248 if (s == NULL
7249 || ! bfd_set_section_flags (abfd, s, flags)
7250 || ! bfd_set_section_alignment (abfd, s,
7251 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
7252 return false;
7254 s->_raw_size = sizeof (Elf32_External_compact_rel);
7257 return true;
7260 /* Create the .got section to hold the global offset table. */
7262 static boolean
7263 mips_elf_create_got_section (abfd, info)
7264 bfd *abfd;
7265 struct bfd_link_info *info;
7267 flagword flags;
7268 register asection *s;
7269 struct elf_link_hash_entry *h;
7270 struct mips_got_info *g;
7272 /* This function may be called more than once. */
7273 if (mips_elf_got_section (abfd))
7274 return true;
7276 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
7277 | SEC_LINKER_CREATED);
7279 s = bfd_make_section (abfd, ".got");
7280 if (s == NULL
7281 || ! bfd_set_section_flags (abfd, s, flags)
7282 || ! bfd_set_section_alignment (abfd, s, 4))
7283 return false;
7285 /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the
7286 linker script because we don't want to define the symbol if we
7287 are not creating a global offset table. */
7288 h = NULL;
7289 if (! (_bfd_generic_link_add_one_symbol
7290 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
7291 (bfd_vma) 0, (const char *) NULL, false,
7292 get_elf_backend_data (abfd)->collect,
7293 (struct bfd_link_hash_entry **) &h)))
7294 return false;
7295 h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
7296 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
7297 h->type = STT_OBJECT;
7299 if (info->shared
7300 && ! bfd_elf32_link_record_dynamic_symbol (info, h))
7301 return false;
7303 /* The first several global offset table entries are reserved. */
7304 s->_raw_size = MIPS_RESERVED_GOTNO * MIPS_ELF_GOT_SIZE (abfd);
7306 g = (struct mips_got_info *) bfd_alloc (abfd,
7307 sizeof (struct mips_got_info));
7308 if (g == NULL)
7309 return false;
7310 g->global_gotsym = NULL;
7311 g->local_gotno = MIPS_RESERVED_GOTNO;
7312 g->assigned_gotno = MIPS_RESERVED_GOTNO;
7313 if (elf_section_data (s) == NULL)
7315 s->used_by_bfd =
7316 (PTR) bfd_zalloc (abfd, sizeof (struct bfd_elf_section_data));
7317 if (elf_section_data (s) == NULL)
7318 return false;
7320 elf_section_data (s)->tdata = (PTR) g;
7321 elf_section_data (s)->this_hdr.sh_flags
7322 |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
7324 return true;
7327 /* Returns the .msym section for ABFD, creating it if it does not
7328 already exist. Returns NULL to indicate error. */
7330 static asection *
7331 mips_elf_create_msym_section (abfd)
7332 bfd *abfd;
7334 asection *s;
7336 s = bfd_get_section_by_name (abfd, MIPS_ELF_MSYM_SECTION_NAME (abfd));
7337 if (!s)
7339 s = bfd_make_section (abfd, MIPS_ELF_MSYM_SECTION_NAME (abfd));
7340 if (!s
7341 || !bfd_set_section_flags (abfd, s,
7342 SEC_ALLOC
7343 | SEC_LOAD
7344 | SEC_HAS_CONTENTS
7345 | SEC_LINKER_CREATED
7346 | SEC_READONLY)
7347 || !bfd_set_section_alignment (abfd, s,
7348 MIPS_ELF_LOG_FILE_ALIGN (abfd)))
7349 return NULL;
7352 return s;
7355 /* Add room for N relocations to the .rel.dyn section in ABFD. */
7357 static void
7358 mips_elf_allocate_dynamic_relocations (abfd, n)
7359 bfd *abfd;
7360 unsigned int n;
7362 asection *s;
7364 s = bfd_get_section_by_name (abfd, MIPS_ELF_REL_DYN_SECTION_NAME (abfd));
7365 BFD_ASSERT (s != NULL);
7367 if (s->_raw_size == 0)
7369 /* Make room for a null element. */
7370 s->_raw_size += MIPS_ELF_REL_SIZE (abfd);
7371 ++s->reloc_count;
7373 s->_raw_size += n * MIPS_ELF_REL_SIZE (abfd);
7376 /* Look through the relocs for a section during the first phase, and
7377 allocate space in the global offset table. */
7379 boolean
7380 _bfd_mips_elf_check_relocs (abfd, info, sec, relocs)
7381 bfd *abfd;
7382 struct bfd_link_info *info;
7383 asection *sec;
7384 const Elf_Internal_Rela *relocs;
7386 const char *name;
7387 bfd *dynobj;
7388 Elf_Internal_Shdr *symtab_hdr;
7389 struct elf_link_hash_entry **sym_hashes;
7390 struct mips_got_info *g;
7391 size_t extsymoff;
7392 const Elf_Internal_Rela *rel;
7393 const Elf_Internal_Rela *rel_end;
7394 asection *sgot;
7395 asection *sreloc;
7396 struct elf_backend_data *bed;
7398 if (info->relocateable)
7399 return true;
7401 dynobj = elf_hash_table (info)->dynobj;
7402 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7403 sym_hashes = elf_sym_hashes (abfd);
7404 extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info;
7406 /* Check for the mips16 stub sections. */
7408 name = bfd_get_section_name (abfd, sec);
7409 if (strncmp (name, FN_STUB, sizeof FN_STUB - 1) == 0)
7411 unsigned long r_symndx;
7413 /* Look at the relocation information to figure out which symbol
7414 this is for. */
7416 r_symndx = ELF32_R_SYM (relocs->r_info);
7418 if (r_symndx < extsymoff
7419 || sym_hashes[r_symndx - extsymoff] == NULL)
7421 asection *o;
7423 /* This stub is for a local symbol. This stub will only be
7424 needed if there is some relocation in this BFD, other
7425 than a 16 bit function call, which refers to this symbol. */
7426 for (o = abfd->sections; o != NULL; o = o->next)
7428 Elf_Internal_Rela *sec_relocs;
7429 const Elf_Internal_Rela *r, *rend;
7431 /* We can ignore stub sections when looking for relocs. */
7432 if ((o->flags & SEC_RELOC) == 0
7433 || o->reloc_count == 0
7434 || strncmp (bfd_get_section_name (abfd, o), FN_STUB,
7435 sizeof FN_STUB - 1) == 0
7436 || strncmp (bfd_get_section_name (abfd, o), CALL_STUB,
7437 sizeof CALL_STUB - 1) == 0
7438 || strncmp (bfd_get_section_name (abfd, o), CALL_FP_STUB,
7439 sizeof CALL_FP_STUB - 1) == 0)
7440 continue;
7442 sec_relocs = (_bfd_elf32_link_read_relocs
7443 (abfd, o, (PTR) NULL,
7444 (Elf_Internal_Rela *) NULL,
7445 info->keep_memory));
7446 if (sec_relocs == NULL)
7447 return false;
7449 rend = sec_relocs + o->reloc_count;
7450 for (r = sec_relocs; r < rend; r++)
7451 if (ELF32_R_SYM (r->r_info) == r_symndx
7452 && ELF32_R_TYPE (r->r_info) != R_MIPS16_26)
7453 break;
7455 if (! info->keep_memory)
7456 free (sec_relocs);
7458 if (r < rend)
7459 break;
7462 if (o == NULL)
7464 /* There is no non-call reloc for this stub, so we do
7465 not need it. Since this function is called before
7466 the linker maps input sections to output sections, we
7467 can easily discard it by setting the SEC_EXCLUDE
7468 flag. */
7469 sec->flags |= SEC_EXCLUDE;
7470 return true;
7473 /* Record this stub in an array of local symbol stubs for
7474 this BFD. */
7475 if (elf_tdata (abfd)->local_stubs == NULL)
7477 unsigned long symcount;
7478 asection **n;
7480 if (elf_bad_symtab (abfd))
7481 symcount = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
7482 else
7483 symcount = symtab_hdr->sh_info;
7484 n = (asection **) bfd_zalloc (abfd,
7485 symcount * sizeof (asection *));
7486 if (n == NULL)
7487 return false;
7488 elf_tdata (abfd)->local_stubs = n;
7491 elf_tdata (abfd)->local_stubs[r_symndx] = sec;
7493 /* We don't need to set mips16_stubs_seen in this case.
7494 That flag is used to see whether we need to look through
7495 the global symbol table for stubs. We don't need to set
7496 it here, because we just have a local stub. */
7498 else
7500 struct mips_elf_link_hash_entry *h;
7502 h = ((struct mips_elf_link_hash_entry *)
7503 sym_hashes[r_symndx - extsymoff]);
7505 /* H is the symbol this stub is for. */
7507 h->fn_stub = sec;
7508 mips_elf_hash_table (info)->mips16_stubs_seen = true;
7511 else if (strncmp (name, CALL_STUB, sizeof CALL_STUB - 1) == 0
7512 || strncmp (name, CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0)
7514 unsigned long r_symndx;
7515 struct mips_elf_link_hash_entry *h;
7516 asection **loc;
7518 /* Look at the relocation information to figure out which symbol
7519 this is for. */
7521 r_symndx = ELF32_R_SYM (relocs->r_info);
7523 if (r_symndx < extsymoff
7524 || sym_hashes[r_symndx - extsymoff] == NULL)
7526 /* This stub was actually built for a static symbol defined
7527 in the same file. We assume that all static symbols in
7528 mips16 code are themselves mips16, so we can simply
7529 discard this stub. Since this function is called before
7530 the linker maps input sections to output sections, we can
7531 easily discard it by setting the SEC_EXCLUDE flag. */
7532 sec->flags |= SEC_EXCLUDE;
7533 return true;
7536 h = ((struct mips_elf_link_hash_entry *)
7537 sym_hashes[r_symndx - extsymoff]);
7539 /* H is the symbol this stub is for. */
7541 if (strncmp (name, CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0)
7542 loc = &h->call_fp_stub;
7543 else
7544 loc = &h->call_stub;
7546 /* If we already have an appropriate stub for this function, we
7547 don't need another one, so we can discard this one. Since
7548 this function is called before the linker maps input sections
7549 to output sections, we can easily discard it by setting the
7550 SEC_EXCLUDE flag. We can also discard this section if we
7551 happen to already know that this is a mips16 function; it is
7552 not necessary to check this here, as it is checked later, but
7553 it is slightly faster to check now. */
7554 if (*loc != NULL || h->root.other == STO_MIPS16)
7556 sec->flags |= SEC_EXCLUDE;
7557 return true;
7560 *loc = sec;
7561 mips_elf_hash_table (info)->mips16_stubs_seen = true;
7564 if (dynobj == NULL)
7566 sgot = NULL;
7567 g = NULL;
7569 else
7571 sgot = mips_elf_got_section (dynobj);
7572 if (sgot == NULL)
7573 g = NULL;
7574 else
7576 BFD_ASSERT (elf_section_data (sgot) != NULL);
7577 g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
7578 BFD_ASSERT (g != NULL);
7582 sreloc = NULL;
7583 bed = get_elf_backend_data (abfd);
7584 rel_end = relocs + sec->reloc_count * bed->s->int_rels_per_ext_rel;
7585 for (rel = relocs; rel < rel_end; ++rel)
7587 unsigned long r_symndx;
7588 int r_type;
7589 struct elf_link_hash_entry *h;
7591 r_symndx = ELF32_R_SYM (rel->r_info);
7592 r_type = ELF32_R_TYPE (rel->r_info);
7594 if (r_symndx < extsymoff)
7595 h = NULL;
7596 else
7598 h = sym_hashes[r_symndx - extsymoff];
7600 /* This may be an indirect symbol created because of a version. */
7601 if (h != NULL)
7603 while (h->root.type == bfd_link_hash_indirect)
7604 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7608 /* Some relocs require a global offset table. */
7609 if (dynobj == NULL || sgot == NULL)
7611 switch (r_type)
7613 case R_MIPS_GOT16:
7614 case R_MIPS_CALL16:
7615 case R_MIPS_CALL_HI16:
7616 case R_MIPS_CALL_LO16:
7617 case R_MIPS_GOT_HI16:
7618 case R_MIPS_GOT_LO16:
7619 case R_MIPS_GOT_PAGE:
7620 case R_MIPS_GOT_OFST:
7621 case R_MIPS_GOT_DISP:
7622 if (dynobj == NULL)
7623 elf_hash_table (info)->dynobj = dynobj = abfd;
7624 if (! mips_elf_create_got_section (dynobj, info))
7625 return false;
7626 g = mips_elf_got_info (dynobj, &sgot);
7627 break;
7629 case R_MIPS_32:
7630 case R_MIPS_REL32:
7631 case R_MIPS_64:
7632 if (dynobj == NULL
7633 && (info->shared || h != NULL)
7634 && (sec->flags & SEC_ALLOC) != 0)
7635 elf_hash_table (info)->dynobj = dynobj = abfd;
7636 break;
7638 default:
7639 break;
7643 if (!h && (r_type == R_MIPS_CALL_LO16
7644 || r_type == R_MIPS_GOT_LO16
7645 || r_type == R_MIPS_GOT_DISP))
7647 /* We may need a local GOT entry for this relocation. We
7648 don't count R_MIPS_GOT_PAGE because we can estimate the
7649 maximum number of pages needed by looking at the size of
7650 the segment. Similar comments apply to R_MIPS_GOT16. We
7651 don't count R_MIPS_GOT_HI16, or R_MIPS_CALL_HI16 because
7652 these are always followed by an R_MIPS_GOT_LO16 or
7653 R_MIPS_CALL_LO16.
7655 This estimation is very conservative since we can merge
7656 duplicate entries in the GOT. In order to be less
7657 conservative, we could actually build the GOT here,
7658 rather than in relocate_section. */
7659 g->local_gotno++;
7660 sgot->_raw_size += MIPS_ELF_GOT_SIZE (dynobj);
7663 switch (r_type)
7665 case R_MIPS_CALL16:
7666 if (h == NULL)
7668 (*_bfd_error_handler)
7669 (_("%s: CALL16 reloc at 0x%lx not against global symbol"),
7670 bfd_get_filename (abfd), (unsigned long) rel->r_offset);
7671 bfd_set_error (bfd_error_bad_value);
7672 return false;
7674 /* Fall through. */
7676 case R_MIPS_CALL_HI16:
7677 case R_MIPS_CALL_LO16:
7678 if (h != NULL)
7680 /* This symbol requires a global offset table entry. */
7681 if (!mips_elf_record_global_got_symbol (h, info, g))
7682 return false;
7684 /* We need a stub, not a plt entry for the undefined
7685 function. But we record it as if it needs plt. See
7686 elf_adjust_dynamic_symbol in elflink.h. */
7687 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
7688 h->type = STT_FUNC;
7690 break;
7692 case R_MIPS_GOT16:
7693 case R_MIPS_GOT_HI16:
7694 case R_MIPS_GOT_LO16:
7695 case R_MIPS_GOT_DISP:
7696 /* This symbol requires a global offset table entry. */
7697 if (h && !mips_elf_record_global_got_symbol (h, info, g))
7698 return false;
7699 break;
7701 case R_MIPS_32:
7702 case R_MIPS_REL32:
7703 case R_MIPS_64:
7704 if ((info->shared || h != NULL)
7705 && (sec->flags & SEC_ALLOC) != 0)
7707 if (sreloc == NULL)
7709 const char *name = MIPS_ELF_REL_DYN_SECTION_NAME (dynobj);
7711 sreloc = bfd_get_section_by_name (dynobj, name);
7712 if (sreloc == NULL)
7714 sreloc = bfd_make_section (dynobj, name);
7715 if (sreloc == NULL
7716 || ! bfd_set_section_flags (dynobj, sreloc,
7717 (SEC_ALLOC
7718 | SEC_LOAD
7719 | SEC_HAS_CONTENTS
7720 | SEC_IN_MEMORY
7721 | SEC_LINKER_CREATED
7722 | SEC_READONLY))
7723 || ! bfd_set_section_alignment (dynobj, sreloc,
7725 return false;
7728 if (info->shared)
7729 /* When creating a shared object, we must copy these
7730 reloc types into the output file as R_MIPS_REL32
7731 relocs. We make room for this reloc in the
7732 .rel.dyn reloc section. */
7733 mips_elf_allocate_dynamic_relocations (dynobj, 1);
7734 else
7736 struct mips_elf_link_hash_entry *hmips;
7738 /* We only need to copy this reloc if the symbol is
7739 defined in a dynamic object. */
7740 hmips = (struct mips_elf_link_hash_entry *) h;
7741 ++hmips->possibly_dynamic_relocs;
7744 /* Even though we don't directly need a GOT entry for
7745 this symbol, a symbol must have a dynamic symbol
7746 table index greater that DT_MIPS_GOTSYM if there are
7747 dynamic relocations against it. */
7748 if (h != NULL
7749 && !mips_elf_record_global_got_symbol (h, info, g))
7750 return false;
7753 if (SGI_COMPAT (dynobj))
7754 mips_elf_hash_table (info)->compact_rel_size +=
7755 sizeof (Elf32_External_crinfo);
7756 break;
7758 case R_MIPS_26:
7759 case R_MIPS_GPREL16:
7760 case R_MIPS_LITERAL:
7761 case R_MIPS_GPREL32:
7762 if (SGI_COMPAT (dynobj))
7763 mips_elf_hash_table (info)->compact_rel_size +=
7764 sizeof (Elf32_External_crinfo);
7765 break;
7767 /* This relocation describes the C++ object vtable hierarchy.
7768 Reconstruct it for later use during GC. */
7769 case R_MIPS_GNU_VTINHERIT:
7770 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
7771 return false;
7772 break;
7774 /* This relocation describes which C++ vtable entries are actually
7775 used. Record for later use during GC. */
7776 case R_MIPS_GNU_VTENTRY:
7777 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
7778 return false;
7779 break;
7781 default:
7782 break;
7785 /* If this reloc is not a 16 bit call, and it has a global
7786 symbol, then we will need the fn_stub if there is one.
7787 References from a stub section do not count. */
7788 if (h != NULL
7789 && r_type != R_MIPS16_26
7790 && strncmp (bfd_get_section_name (abfd, sec), FN_STUB,
7791 sizeof FN_STUB - 1) != 0
7792 && strncmp (bfd_get_section_name (abfd, sec), CALL_STUB,
7793 sizeof CALL_STUB - 1) != 0
7794 && strncmp (bfd_get_section_name (abfd, sec), CALL_FP_STUB,
7795 sizeof CALL_FP_STUB - 1) != 0)
7797 struct mips_elf_link_hash_entry *mh;
7799 mh = (struct mips_elf_link_hash_entry *) h;
7800 mh->need_fn_stub = true;
7804 return true;
7807 /* Return the section that should be marked against GC for a given
7808 relocation. */
7810 asection *
7811 _bfd_mips_elf_gc_mark_hook (abfd, info, rel, h, sym)
7812 bfd *abfd;
7813 struct bfd_link_info *info ATTRIBUTE_UNUSED;
7814 Elf_Internal_Rela *rel;
7815 struct elf_link_hash_entry *h;
7816 Elf_Internal_Sym *sym;
7818 /* ??? Do mips16 stub sections need to be handled special? */
7820 if (h != NULL)
7822 switch (ELF32_R_TYPE (rel->r_info))
7824 case R_MIPS_GNU_VTINHERIT:
7825 case R_MIPS_GNU_VTENTRY:
7826 break;
7828 default:
7829 switch (h->root.type)
7831 case bfd_link_hash_defined:
7832 case bfd_link_hash_defweak:
7833 return h->root.u.def.section;
7835 case bfd_link_hash_common:
7836 return h->root.u.c.p->section;
7838 default:
7839 break;
7843 else
7845 if (!(elf_bad_symtab (abfd)
7846 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
7847 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
7848 && sym->st_shndx != SHN_COMMON))
7850 return bfd_section_from_elf_index (abfd, sym->st_shndx);
7854 return NULL;
7857 /* Update the got entry reference counts for the section being removed. */
7859 boolean
7860 _bfd_mips_elf_gc_sweep_hook (abfd, info, sec, relocs)
7861 bfd *abfd ATTRIBUTE_UNUSED;
7862 struct bfd_link_info *info ATTRIBUTE_UNUSED;
7863 asection *sec ATTRIBUTE_UNUSED;
7864 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
7866 #if 0
7867 Elf_Internal_Shdr *symtab_hdr;
7868 struct elf_link_hash_entry **sym_hashes;
7869 bfd_signed_vma *local_got_refcounts;
7870 const Elf_Internal_Rela *rel, *relend;
7871 unsigned long r_symndx;
7872 struct elf_link_hash_entry *h;
7874 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
7875 sym_hashes = elf_sym_hashes (abfd);
7876 local_got_refcounts = elf_local_got_refcounts (abfd);
7878 relend = relocs + sec->reloc_count;
7879 for (rel = relocs; rel < relend; rel++)
7880 switch (ELF32_R_TYPE (rel->r_info))
7882 case R_MIPS_GOT16:
7883 case R_MIPS_CALL16:
7884 case R_MIPS_CALL_HI16:
7885 case R_MIPS_CALL_LO16:
7886 case R_MIPS_GOT_HI16:
7887 case R_MIPS_GOT_LO16:
7888 /* ??? It would seem that the existing MIPS code does no sort
7889 of reference counting or whatnot on its GOT and PLT entries,
7890 so it is not possible to garbage collect them at this time. */
7891 break;
7893 default:
7894 break;
7896 #endif
7898 return true;
7901 /* Copy data from a MIPS ELF indirect symbol to its direct symbol,
7902 hiding the old indirect symbol. Process additional relocation
7903 information. */
7905 void
7906 _bfd_mips_elf_copy_indirect_symbol (dir, ind)
7907 struct elf_link_hash_entry *dir, *ind;
7909 struct mips_elf_link_hash_entry *dirmips, *indmips;
7911 _bfd_elf_link_hash_copy_indirect (dir, ind);
7913 dirmips = (struct mips_elf_link_hash_entry *) dir;
7914 indmips = (struct mips_elf_link_hash_entry *) ind;
7915 dirmips->possibly_dynamic_relocs += indmips->possibly_dynamic_relocs;
7916 if (dirmips->min_dyn_reloc_index == 0
7917 || (indmips->min_dyn_reloc_index != 0
7918 && indmips->min_dyn_reloc_index < dirmips->min_dyn_reloc_index))
7919 dirmips->min_dyn_reloc_index = indmips->min_dyn_reloc_index;
7922 /* Adjust a symbol defined by a dynamic object and referenced by a
7923 regular object. The current definition is in some section of the
7924 dynamic object, but we're not including those sections. We have to
7925 change the definition to something the rest of the link can
7926 understand. */
7928 boolean
7929 _bfd_mips_elf_adjust_dynamic_symbol (info, h)
7930 struct bfd_link_info *info;
7931 struct elf_link_hash_entry *h;
7933 bfd *dynobj;
7934 struct mips_elf_link_hash_entry *hmips;
7935 asection *s;
7937 dynobj = elf_hash_table (info)->dynobj;
7939 /* Make sure we know what is going on here. */
7940 BFD_ASSERT (dynobj != NULL
7941 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
7942 || h->weakdef != NULL
7943 || ((h->elf_link_hash_flags
7944 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
7945 && (h->elf_link_hash_flags
7946 & ELF_LINK_HASH_REF_REGULAR) != 0
7947 && (h->elf_link_hash_flags
7948 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
7950 /* If this symbol is defined in a dynamic object, we need to copy
7951 any R_MIPS_32 or R_MIPS_REL32 relocs against it into the output
7952 file. */
7953 hmips = (struct mips_elf_link_hash_entry *) h;
7954 if (! info->relocateable
7955 && hmips->possibly_dynamic_relocs != 0
7956 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
7957 mips_elf_allocate_dynamic_relocations (dynobj,
7958 hmips->possibly_dynamic_relocs);
7960 /* For a function, create a stub, if needed. */
7961 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
7963 if (! elf_hash_table (info)->dynamic_sections_created)
7964 return true;
7966 /* If this symbol is not defined in a regular file, then set
7967 the symbol to the stub location. This is required to make
7968 function pointers compare as equal between the normal
7969 executable and the shared library. */
7970 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
7972 /* We need .stub section. */
7973 s = bfd_get_section_by_name (dynobj,
7974 MIPS_ELF_STUB_SECTION_NAME (dynobj));
7975 BFD_ASSERT (s != NULL);
7977 h->root.u.def.section = s;
7978 h->root.u.def.value = s->_raw_size;
7980 /* XXX Write this stub address somewhere. */
7981 h->plt.offset = s->_raw_size;
7983 /* Make room for this stub code. */
7984 s->_raw_size += MIPS_FUNCTION_STUB_SIZE;
7986 /* The last half word of the stub will be filled with the index
7987 of this symbol in .dynsym section. */
7988 return true;
7991 else if ((h->type == STT_FUNC)
7992 && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0)
7994 /* This will set the entry for this symbol in the GOT to 0, and
7995 the dynamic linker will take care of this. */
7996 h->root.u.def.value = 0;
7997 return true;
8000 /* If this is a weak symbol, and there is a real definition, the
8001 processor independent code will have arranged for us to see the
8002 real definition first, and we can just use the same value. */
8003 if (h->weakdef != NULL)
8005 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
8006 || h->weakdef->root.type == bfd_link_hash_defweak);
8007 h->root.u.def.section = h->weakdef->root.u.def.section;
8008 h->root.u.def.value = h->weakdef->root.u.def.value;
8009 return true;
8012 /* This is a reference to a symbol defined by a dynamic object which
8013 is not a function. */
8015 return true;
8018 /* This function is called after all the input files have been read,
8019 and the input sections have been assigned to output sections. We
8020 check for any mips16 stub sections that we can discard. */
8022 static boolean mips_elf_check_mips16_stubs
8023 PARAMS ((struct mips_elf_link_hash_entry *, PTR));
8025 boolean
8026 _bfd_mips_elf_always_size_sections (output_bfd, info)
8027 bfd *output_bfd;
8028 struct bfd_link_info *info;
8030 asection *ri;
8032 /* The .reginfo section has a fixed size. */
8033 ri = bfd_get_section_by_name (output_bfd, ".reginfo");
8034 if (ri != NULL)
8035 bfd_set_section_size (output_bfd, ri, sizeof (Elf32_External_RegInfo));
8037 if (info->relocateable
8038 || ! mips_elf_hash_table (info)->mips16_stubs_seen)
8039 return true;
8041 mips_elf_link_hash_traverse (mips_elf_hash_table (info),
8042 mips_elf_check_mips16_stubs,
8043 (PTR) NULL);
8045 return true;
8048 /* Check the mips16 stubs for a particular symbol, and see if we can
8049 discard them. */
8051 /*ARGSUSED*/
8052 static boolean
8053 mips_elf_check_mips16_stubs (h, data)
8054 struct mips_elf_link_hash_entry *h;
8055 PTR data ATTRIBUTE_UNUSED;
8057 if (h->fn_stub != NULL
8058 && ! h->need_fn_stub)
8060 /* We don't need the fn_stub; the only references to this symbol
8061 are 16 bit calls. Clobber the size to 0 to prevent it from
8062 being included in the link. */
8063 h->fn_stub->_raw_size = 0;
8064 h->fn_stub->_cooked_size = 0;
8065 h->fn_stub->flags &= ~ SEC_RELOC;
8066 h->fn_stub->reloc_count = 0;
8067 h->fn_stub->flags |= SEC_EXCLUDE;
8070 if (h->call_stub != NULL
8071 && h->root.other == STO_MIPS16)
8073 /* We don't need the call_stub; this is a 16 bit function, so
8074 calls from other 16 bit functions are OK. Clobber the size
8075 to 0 to prevent it from being included in the link. */
8076 h->call_stub->_raw_size = 0;
8077 h->call_stub->_cooked_size = 0;
8078 h->call_stub->flags &= ~ SEC_RELOC;
8079 h->call_stub->reloc_count = 0;
8080 h->call_stub->flags |= SEC_EXCLUDE;
8083 if (h->call_fp_stub != NULL
8084 && h->root.other == STO_MIPS16)
8086 /* We don't need the call_stub; this is a 16 bit function, so
8087 calls from other 16 bit functions are OK. Clobber the size
8088 to 0 to prevent it from being included in the link. */
8089 h->call_fp_stub->_raw_size = 0;
8090 h->call_fp_stub->_cooked_size = 0;
8091 h->call_fp_stub->flags &= ~ SEC_RELOC;
8092 h->call_fp_stub->reloc_count = 0;
8093 h->call_fp_stub->flags |= SEC_EXCLUDE;
8096 return true;
8099 /* Set the sizes of the dynamic sections. */
8101 boolean
8102 _bfd_mips_elf_size_dynamic_sections (output_bfd, info)
8103 bfd *output_bfd;
8104 struct bfd_link_info *info;
8106 bfd *dynobj;
8107 asection *s;
8108 boolean reltext;
8109 struct mips_got_info *g = NULL;
8111 dynobj = elf_hash_table (info)->dynobj;
8112 BFD_ASSERT (dynobj != NULL);
8114 if (elf_hash_table (info)->dynamic_sections_created)
8116 /* Set the contents of the .interp section to the interpreter. */
8117 if (! info->shared)
8119 s = bfd_get_section_by_name (dynobj, ".interp");
8120 BFD_ASSERT (s != NULL);
8121 s->_raw_size
8122 = strlen (ELF_DYNAMIC_INTERPRETER (output_bfd)) + 1;
8123 s->contents
8124 = (bfd_byte *) ELF_DYNAMIC_INTERPRETER (output_bfd);
8128 /* The check_relocs and adjust_dynamic_symbol entry points have
8129 determined the sizes of the various dynamic sections. Allocate
8130 memory for them. */
8131 reltext = false;
8132 for (s = dynobj->sections; s != NULL; s = s->next)
8134 const char *name;
8135 boolean strip;
8137 /* It's OK to base decisions on the section name, because none
8138 of the dynobj section names depend upon the input files. */
8139 name = bfd_get_section_name (dynobj, s);
8141 if ((s->flags & SEC_LINKER_CREATED) == 0)
8142 continue;
8144 strip = false;
8146 if (strncmp (name, ".rel", 4) == 0)
8148 if (s->_raw_size == 0)
8150 /* We only strip the section if the output section name
8151 has the same name. Otherwise, there might be several
8152 input sections for this output section. FIXME: This
8153 code is probably not needed these days anyhow, since
8154 the linker now does not create empty output sections. */
8155 if (s->output_section != NULL
8156 && strcmp (name,
8157 bfd_get_section_name (s->output_section->owner,
8158 s->output_section)) == 0)
8159 strip = true;
8161 else
8163 const char *outname;
8164 asection *target;
8166 /* If this relocation section applies to a read only
8167 section, then we probably need a DT_TEXTREL entry.
8168 If the relocation section is .rel.dyn, we always
8169 assert a DT_TEXTREL entry rather than testing whether
8170 there exists a relocation to a read only section or
8171 not. */
8172 outname = bfd_get_section_name (output_bfd,
8173 s->output_section);
8174 target = bfd_get_section_by_name (output_bfd, outname + 4);
8175 if ((target != NULL
8176 && (target->flags & SEC_READONLY) != 0
8177 && (target->flags & SEC_ALLOC) != 0)
8178 || strcmp (outname,
8179 MIPS_ELF_REL_DYN_SECTION_NAME (output_bfd)) == 0)
8180 reltext = true;
8182 /* We use the reloc_count field as a counter if we need
8183 to copy relocs into the output file. */
8184 if (strcmp (name,
8185 MIPS_ELF_REL_DYN_SECTION_NAME (output_bfd)) != 0)
8186 s->reloc_count = 0;
8189 else if (strncmp (name, ".got", 4) == 0)
8191 int i;
8192 bfd_size_type loadable_size = 0;
8193 bfd_size_type local_gotno;
8194 struct _bfd *sub;
8196 BFD_ASSERT (elf_section_data (s) != NULL);
8197 g = (struct mips_got_info *) elf_section_data (s)->tdata;
8198 BFD_ASSERT (g != NULL);
8200 /* Calculate the total loadable size of the output. That
8201 will give us the maximum number of GOT_PAGE entries
8202 required. */
8203 for (sub = info->input_bfds; sub; sub = sub->link_next)
8205 asection *subsection;
8207 for (subsection = sub->sections;
8208 subsection;
8209 subsection = subsection->next)
8211 if ((subsection->flags & SEC_ALLOC) == 0)
8212 continue;
8213 loadable_size += (subsection->_raw_size + 0xf) & ~0xf;
8216 loadable_size += MIPS_FUNCTION_STUB_SIZE;
8218 /* Assume there are two loadable segments consisting of
8219 contiguous sections. Is 5 enough? */
8220 local_gotno = (loadable_size >> 16) + 5;
8221 if (IRIX_COMPAT (output_bfd) == ict_irix6)
8222 /* It's possible we will need GOT_PAGE entries as well as
8223 GOT16 entries. Often, these will be able to share GOT
8224 entries, but not always. */
8225 local_gotno *= 2;
8227 g->local_gotno += local_gotno;
8228 s->_raw_size += local_gotno * MIPS_ELF_GOT_SIZE (dynobj);
8230 /* There has to be a global GOT entry for every symbol with
8231 a dynamic symbol table index of DT_MIPS_GOTSYM or
8232 higher. Therefore, it make sense to put those symbols
8233 that need GOT entries at the end of the symbol table. We
8234 do that here. */
8235 if (!mips_elf_sort_hash_table (info, 1))
8236 return false;
8238 if (g->global_gotsym != NULL)
8239 i = elf_hash_table (info)->dynsymcount - g->global_gotsym->dynindx;
8240 else
8241 /* If there are no global symbols, or none requiring
8242 relocations, then GLOBAL_GOTSYM will be NULL. */
8243 i = 0;
8244 g->global_gotno = i;
8245 s->_raw_size += i * MIPS_ELF_GOT_SIZE (dynobj);
8247 else if (strcmp (name, MIPS_ELF_STUB_SECTION_NAME (output_bfd)) == 0)
8249 /* Irix rld assumes that the function stub isn't at the end
8250 of .text section. So put a dummy. XXX */
8251 s->_raw_size += MIPS_FUNCTION_STUB_SIZE;
8253 else if (! info->shared
8254 && ! mips_elf_hash_table (info)->use_rld_obj_head
8255 && strncmp (name, ".rld_map", 8) == 0)
8257 /* We add a room for __rld_map. It will be filled in by the
8258 rtld to contain a pointer to the _r_debug structure. */
8259 s->_raw_size += 4;
8261 else if (SGI_COMPAT (output_bfd)
8262 && strncmp (name, ".compact_rel", 12) == 0)
8263 s->_raw_size += mips_elf_hash_table (info)->compact_rel_size;
8264 else if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (output_bfd))
8265 == 0)
8266 s->_raw_size = (sizeof (Elf32_External_Msym)
8267 * (elf_hash_table (info)->dynsymcount
8268 + bfd_count_sections (output_bfd)));
8269 else if (strncmp (name, ".init", 5) != 0)
8271 /* It's not one of our sections, so don't allocate space. */
8272 continue;
8275 if (strip)
8277 _bfd_strip_section_from_output (info, s);
8278 continue;
8281 /* Allocate memory for the section contents. */
8282 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
8283 if (s->contents == NULL && s->_raw_size != 0)
8285 bfd_set_error (bfd_error_no_memory);
8286 return false;
8290 if (elf_hash_table (info)->dynamic_sections_created)
8292 /* Add some entries to the .dynamic section. We fill in the
8293 values later, in elf_mips_finish_dynamic_sections, but we
8294 must add the entries now so that we get the correct size for
8295 the .dynamic section. The DT_DEBUG entry is filled in by the
8296 dynamic linker and used by the debugger. */
8297 if (! info->shared)
8299 /* SGI object has the equivalence of DT_DEBUG in the
8300 DT_MIPS_RLD_MAP entry. */
8301 if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_MAP, 0))
8302 return false;
8303 if (!SGI_COMPAT (output_bfd))
8305 if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0))
8306 return false;
8309 else
8311 /* Shared libraries on traditional mips have DT_DEBUG. */
8312 if (!SGI_COMPAT (output_bfd))
8314 if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0))
8315 return false;
8318 if (reltext && SGI_COMPAT(output_bfd))
8320 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_TEXTREL, 0))
8321 return false;
8322 info->flags |= DF_TEXTREL;
8325 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTGOT, 0))
8326 return false;
8328 if (bfd_get_section_by_name (dynobj,
8329 MIPS_ELF_REL_DYN_SECTION_NAME (dynobj)))
8331 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_REL, 0))
8332 return false;
8334 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELSZ, 0))
8335 return false;
8337 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELENT, 0))
8338 return false;
8341 if (SGI_COMPAT (output_bfd))
8343 if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_CONFLICTNO, 0))
8344 return false;
8347 if (SGI_COMPAT (output_bfd))
8349 if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LIBLISTNO, 0))
8350 return false;
8353 if (bfd_get_section_by_name (dynobj, ".conflict") != NULL)
8355 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_CONFLICT, 0))
8356 return false;
8358 s = bfd_get_section_by_name (dynobj, ".liblist");
8359 BFD_ASSERT (s != NULL);
8361 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LIBLIST, 0))
8362 return false;
8365 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_VERSION, 0))
8366 return false;
8368 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_FLAGS, 0))
8369 return false;
8371 #if 0
8372 /* Time stamps in executable files are a bad idea. */
8373 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_TIME_STAMP, 0))
8374 return false;
8375 #endif
8377 #if 0 /* FIXME */
8378 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_ICHECKSUM, 0))
8379 return false;
8380 #endif
8382 #if 0 /* FIXME */
8383 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_IVERSION, 0))
8384 return false;
8385 #endif
8387 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_BASE_ADDRESS, 0))
8388 return false;
8390 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LOCAL_GOTNO, 0))
8391 return false;
8393 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_SYMTABNO, 0))
8394 return false;
8396 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_UNREFEXTNO, 0))
8397 return false;
8399 if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_GOTSYM, 0))
8400 return false;
8402 if (IRIX_COMPAT (dynobj) == ict_irix5
8403 && ! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_HIPAGENO, 0))
8404 return false;
8406 if (IRIX_COMPAT (dynobj) == ict_irix6
8407 && (bfd_get_section_by_name
8408 (dynobj, MIPS_ELF_OPTIONS_SECTION_NAME (dynobj)))
8409 && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_OPTIONS, 0))
8410 return false;
8412 if (bfd_get_section_by_name (dynobj,
8413 MIPS_ELF_MSYM_SECTION_NAME (dynobj))
8414 && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_MSYM, 0))
8415 return false;
8418 return true;
8421 /* If NAME is one of the special IRIX6 symbols defined by the linker,
8422 adjust it appropriately now. */
8424 static void
8425 mips_elf_irix6_finish_dynamic_symbol (abfd, name, sym)
8426 bfd *abfd ATTRIBUTE_UNUSED;
8427 const char *name;
8428 Elf_Internal_Sym *sym;
8430 /* The linker script takes care of providing names and values for
8431 these, but we must place them into the right sections. */
8432 static const char* const text_section_symbols[] = {
8433 "_ftext",
8434 "_etext",
8435 "__dso_displacement",
8436 "__elf_header",
8437 "__program_header_table",
8438 NULL
8441 static const char* const data_section_symbols[] = {
8442 "_fdata",
8443 "_edata",
8444 "_end",
8445 "_fbss",
8446 NULL
8449 const char* const *p;
8450 int i;
8452 for (i = 0; i < 2; ++i)
8453 for (p = (i == 0) ? text_section_symbols : data_section_symbols;
8455 ++p)
8456 if (strcmp (*p, name) == 0)
8458 /* All of these symbols are given type STT_SECTION by the
8459 IRIX6 linker. */
8460 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8462 /* The IRIX linker puts these symbols in special sections. */
8463 if (i == 0)
8464 sym->st_shndx = SHN_MIPS_TEXT;
8465 else
8466 sym->st_shndx = SHN_MIPS_DATA;
8468 break;
8472 /* Finish up dynamic symbol handling. We set the contents of various
8473 dynamic sections here. */
8475 boolean
8476 _bfd_mips_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
8477 bfd *output_bfd;
8478 struct bfd_link_info *info;
8479 struct elf_link_hash_entry *h;
8480 Elf_Internal_Sym *sym;
8482 bfd *dynobj;
8483 bfd_vma gval;
8484 asection *sgot;
8485 asection *smsym;
8486 struct mips_got_info *g;
8487 const char *name;
8488 struct mips_elf_link_hash_entry *mh;
8490 dynobj = elf_hash_table (info)->dynobj;
8491 gval = sym->st_value;
8492 mh = (struct mips_elf_link_hash_entry *) h;
8494 if (h->plt.offset != (bfd_vma) -1)
8496 asection *s;
8497 bfd_byte *p;
8498 bfd_byte stub[MIPS_FUNCTION_STUB_SIZE];
8500 /* This symbol has a stub. Set it up. */
8502 BFD_ASSERT (h->dynindx != -1);
8504 s = bfd_get_section_by_name (dynobj,
8505 MIPS_ELF_STUB_SECTION_NAME (dynobj));
8506 BFD_ASSERT (s != NULL);
8508 /* Fill the stub. */
8509 p = stub;
8510 bfd_put_32 (output_bfd, STUB_LW(output_bfd), p);
8511 p += 4;
8512 bfd_put_32 (output_bfd, STUB_MOVE(output_bfd), p);
8513 p += 4;
8515 /* FIXME: Can h->dynindex be more than 64K? */
8516 if (h->dynindx & 0xffff0000)
8517 return false;
8519 bfd_put_32 (output_bfd, STUB_JALR, p);
8520 p += 4;
8521 bfd_put_32 (output_bfd, STUB_LI16(output_bfd) + h->dynindx, p);
8523 BFD_ASSERT (h->plt.offset <= s->_raw_size);
8524 memcpy (s->contents + h->plt.offset, stub, MIPS_FUNCTION_STUB_SIZE);
8526 /* Mark the symbol as undefined. plt.offset != -1 occurs
8527 only for the referenced symbol. */
8528 sym->st_shndx = SHN_UNDEF;
8530 /* The run-time linker uses the st_value field of the symbol
8531 to reset the global offset table entry for this external
8532 to its stub address when unlinking a shared object. */
8533 gval = s->output_section->vma + s->output_offset + h->plt.offset;
8534 sym->st_value = gval;
8537 BFD_ASSERT (h->dynindx != -1
8538 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0);
8540 sgot = mips_elf_got_section (dynobj);
8541 BFD_ASSERT (sgot != NULL);
8542 BFD_ASSERT (elf_section_data (sgot) != NULL);
8543 g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
8544 BFD_ASSERT (g != NULL);
8546 /* Run through the global symbol table, creating GOT entries for all
8547 the symbols that need them. */
8548 if (g->global_gotsym != NULL
8549 && h->dynindx >= g->global_gotsym->dynindx)
8551 bfd_vma offset;
8552 bfd_vma value;
8554 if (sym->st_value)
8555 value = sym->st_value;
8556 else
8558 /* For an entity defined in a shared object, this will be
8559 NULL. (For functions in shared objects for
8560 which we have created stubs, ST_VALUE will be non-NULL.
8561 That's because such the functions are now no longer defined
8562 in a shared object.) */
8564 if (info->shared && h->root.type == bfd_link_hash_undefined)
8565 value = 0;
8566 else
8567 value = h->root.u.def.value;
8569 offset = mips_elf_global_got_index (dynobj, h);
8570 MIPS_ELF_PUT_WORD (output_bfd, value, sgot->contents + offset);
8573 /* Create a .msym entry, if appropriate. */
8574 smsym = bfd_get_section_by_name (dynobj,
8575 MIPS_ELF_MSYM_SECTION_NAME (dynobj));
8576 if (smsym)
8578 Elf32_Internal_Msym msym;
8580 msym.ms_hash_value = bfd_elf_hash (h->root.root.string);
8581 /* It is undocumented what the `1' indicates, but IRIX6 uses
8582 this value. */
8583 msym.ms_info = ELF32_MS_INFO (mh->min_dyn_reloc_index, 1);
8584 bfd_mips_elf_swap_msym_out
8585 (dynobj, &msym,
8586 ((Elf32_External_Msym *) smsym->contents) + h->dynindx);
8589 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
8590 name = h->root.root.string;
8591 if (strcmp (name, "_DYNAMIC") == 0
8592 || strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0)
8593 sym->st_shndx = SHN_ABS;
8594 else if (strcmp (name, "_DYNAMIC_LINK") == 0
8595 || strcmp (name, "_DYNAMIC_LINKING") == 0)
8597 sym->st_shndx = SHN_ABS;
8598 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8599 sym->st_value = 1;
8601 else if (strcmp (name, "_gp_disp") == 0)
8603 sym->st_shndx = SHN_ABS;
8604 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8605 sym->st_value = elf_gp (output_bfd);
8607 else if (SGI_COMPAT (output_bfd))
8609 if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0
8610 || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0)
8612 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8613 sym->st_other = STO_PROTECTED;
8614 sym->st_value = 0;
8615 sym->st_shndx = SHN_MIPS_DATA;
8617 else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0)
8619 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
8620 sym->st_other = STO_PROTECTED;
8621 sym->st_value = mips_elf_hash_table (info)->procedure_count;
8622 sym->st_shndx = SHN_ABS;
8624 else if (sym->st_shndx != SHN_UNDEF && sym->st_shndx != SHN_ABS)
8626 if (h->type == STT_FUNC)
8627 sym->st_shndx = SHN_MIPS_TEXT;
8628 else if (h->type == STT_OBJECT)
8629 sym->st_shndx = SHN_MIPS_DATA;
8633 /* Handle the IRIX6-specific symbols. */
8634 if (IRIX_COMPAT (output_bfd) == ict_irix6)
8635 mips_elf_irix6_finish_dynamic_symbol (output_bfd, name, sym);
8637 if (! info->shared)
8639 if (! mips_elf_hash_table (info)->use_rld_obj_head
8640 && (strcmp (name, "__rld_map") == 0
8641 || strcmp (name, "__RLD_MAP") == 0))
8643 asection *s = bfd_get_section_by_name (dynobj, ".rld_map");
8644 BFD_ASSERT (s != NULL);
8645 sym->st_value = s->output_section->vma + s->output_offset;
8646 bfd_put_32 (output_bfd, (bfd_vma) 0, s->contents);
8647 if (mips_elf_hash_table (info)->rld_value == 0)
8648 mips_elf_hash_table (info)->rld_value = sym->st_value;
8650 else if (mips_elf_hash_table (info)->use_rld_obj_head
8651 && strcmp (name, "__rld_obj_head") == 0)
8653 /* IRIX6 does not use a .rld_map section. */
8654 if (IRIX_COMPAT (output_bfd) == ict_irix5
8655 || IRIX_COMPAT (output_bfd) == ict_none)
8656 BFD_ASSERT (bfd_get_section_by_name (dynobj, ".rld_map")
8657 != NULL);
8658 mips_elf_hash_table (info)->rld_value = sym->st_value;
8662 /* If this is a mips16 symbol, force the value to be even. */
8663 if (sym->st_other == STO_MIPS16
8664 && (sym->st_value & 1) != 0)
8665 --sym->st_value;
8667 return true;
8670 /* Finish up the dynamic sections. */
8672 boolean
8673 _bfd_mips_elf_finish_dynamic_sections (output_bfd, info)
8674 bfd *output_bfd;
8675 struct bfd_link_info *info;
8677 bfd *dynobj;
8678 asection *sdyn;
8679 asection *sgot;
8680 struct mips_got_info *g;
8682 dynobj = elf_hash_table (info)->dynobj;
8684 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8686 sgot = mips_elf_got_section (dynobj);
8687 if (sgot == NULL)
8688 g = NULL;
8689 else
8691 BFD_ASSERT (elf_section_data (sgot) != NULL);
8692 g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
8693 BFD_ASSERT (g != NULL);
8696 if (elf_hash_table (info)->dynamic_sections_created)
8698 bfd_byte *b;
8700 BFD_ASSERT (sdyn != NULL);
8701 BFD_ASSERT (g != NULL);
8703 for (b = sdyn->contents;
8704 b < sdyn->contents + sdyn->_raw_size;
8705 b += MIPS_ELF_DYN_SIZE (dynobj))
8707 Elf_Internal_Dyn dyn;
8708 const char *name;
8709 size_t elemsize;
8710 asection *s;
8711 boolean swap_out_p;
8713 /* Read in the current dynamic entry. */
8714 (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn);
8716 /* Assume that we're going to modify it and write it out. */
8717 swap_out_p = true;
8719 switch (dyn.d_tag)
8721 case DT_RELENT:
8722 s = (bfd_get_section_by_name
8723 (dynobj,
8724 MIPS_ELF_REL_DYN_SECTION_NAME (dynobj)));
8725 BFD_ASSERT (s != NULL);
8726 dyn.d_un.d_val = MIPS_ELF_REL_SIZE (dynobj);
8727 break;
8729 case DT_STRSZ:
8730 /* Rewrite DT_STRSZ. */
8731 dyn.d_un.d_val =
8732 _bfd_stringtab_size (elf_hash_table (info)->dynstr);
8733 break;
8735 case DT_PLTGOT:
8736 name = ".got";
8737 goto get_vma;
8738 case DT_MIPS_CONFLICT:
8739 name = ".conflict";
8740 goto get_vma;
8741 case DT_MIPS_LIBLIST:
8742 name = ".liblist";
8743 get_vma:
8744 s = bfd_get_section_by_name (output_bfd, name);
8745 BFD_ASSERT (s != NULL);
8746 dyn.d_un.d_ptr = s->vma;
8747 break;
8749 case DT_MIPS_RLD_VERSION:
8750 dyn.d_un.d_val = 1; /* XXX */
8751 break;
8753 case DT_MIPS_FLAGS:
8754 dyn.d_un.d_val = RHF_NOTPOT; /* XXX */
8755 break;
8757 case DT_MIPS_CONFLICTNO:
8758 name = ".conflict";
8759 elemsize = sizeof (Elf32_Conflict);
8760 goto set_elemno;
8762 case DT_MIPS_LIBLISTNO:
8763 name = ".liblist";
8764 elemsize = sizeof (Elf32_Lib);
8765 set_elemno:
8766 s = bfd_get_section_by_name (output_bfd, name);
8767 if (s != NULL)
8769 if (s->_cooked_size != 0)
8770 dyn.d_un.d_val = s->_cooked_size / elemsize;
8771 else
8772 dyn.d_un.d_val = s->_raw_size / elemsize;
8774 else
8775 dyn.d_un.d_val = 0;
8776 break;
8778 case DT_MIPS_TIME_STAMP:
8779 time ((time_t *) &dyn.d_un.d_val);
8780 break;
8782 case DT_MIPS_ICHECKSUM:
8783 /* XXX FIXME: */
8784 swap_out_p = false;
8785 break;
8787 case DT_MIPS_IVERSION:
8788 /* XXX FIXME: */
8789 swap_out_p = false;
8790 break;
8792 case DT_MIPS_BASE_ADDRESS:
8793 s = output_bfd->sections;
8794 BFD_ASSERT (s != NULL);
8795 dyn.d_un.d_ptr = s->vma & ~(0xffff);
8796 break;
8798 case DT_MIPS_LOCAL_GOTNO:
8799 dyn.d_un.d_val = g->local_gotno;
8800 break;
8802 case DT_MIPS_UNREFEXTNO:
8803 /* The index into the dynamic symbol table which is the
8804 entry of the first external symbol that is not
8805 referenced within the same object. */
8806 dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1;
8807 break;
8809 case DT_MIPS_GOTSYM:
8810 if (g->global_gotsym)
8812 dyn.d_un.d_val = g->global_gotsym->dynindx;
8813 break;
8815 /* In case if we don't have global got symbols we default
8816 to setting DT_MIPS_GOTSYM to the same value as
8817 DT_MIPS_SYMTABNO, so we just fall through. */
8819 case DT_MIPS_SYMTABNO:
8820 name = ".dynsym";
8821 elemsize = MIPS_ELF_SYM_SIZE (output_bfd);
8822 s = bfd_get_section_by_name (output_bfd, name);
8823 BFD_ASSERT (s != NULL);
8825 if (s->_cooked_size != 0)
8826 dyn.d_un.d_val = s->_cooked_size / elemsize;
8827 else
8828 dyn.d_un.d_val = s->_raw_size / elemsize;
8829 break;
8831 case DT_MIPS_HIPAGENO:
8832 dyn.d_un.d_val = g->local_gotno - MIPS_RESERVED_GOTNO;
8833 break;
8835 case DT_MIPS_RLD_MAP:
8836 dyn.d_un.d_ptr = mips_elf_hash_table (info)->rld_value;
8837 break;
8839 case DT_MIPS_OPTIONS:
8840 s = (bfd_get_section_by_name
8841 (output_bfd, MIPS_ELF_OPTIONS_SECTION_NAME (output_bfd)));
8842 dyn.d_un.d_ptr = s->vma;
8843 break;
8845 case DT_MIPS_MSYM:
8846 s = (bfd_get_section_by_name
8847 (output_bfd, MIPS_ELF_MSYM_SECTION_NAME (output_bfd)));
8848 dyn.d_un.d_ptr = s->vma;
8849 break;
8851 default:
8852 swap_out_p = false;
8853 break;
8856 if (swap_out_p)
8857 (*get_elf_backend_data (dynobj)->s->swap_dyn_out)
8858 (dynobj, &dyn, b);
8862 /* The first entry of the global offset table will be filled at
8863 runtime. The second entry will be used by some runtime loaders.
8864 This isn't the case of Irix rld. */
8865 if (sgot != NULL && sgot->_raw_size > 0)
8867 MIPS_ELF_PUT_WORD (output_bfd, (bfd_vma) 0, sgot->contents);
8868 MIPS_ELF_PUT_WORD (output_bfd, (bfd_vma) 0x80000000,
8869 sgot->contents + MIPS_ELF_GOT_SIZE (output_bfd));
8872 if (sgot != NULL)
8873 elf_section_data (sgot->output_section)->this_hdr.sh_entsize
8874 = MIPS_ELF_GOT_SIZE (output_bfd);
8877 asection *smsym;
8878 asection *s;
8879 Elf32_compact_rel cpt;
8881 /* ??? The section symbols for the output sections were set up in
8882 _bfd_elf_final_link. SGI sets the STT_NOTYPE attribute for these
8883 symbols. Should we do so? */
8885 smsym = bfd_get_section_by_name (dynobj,
8886 MIPS_ELF_MSYM_SECTION_NAME (dynobj));
8887 if (smsym != NULL)
8889 Elf32_Internal_Msym msym;
8891 msym.ms_hash_value = 0;
8892 msym.ms_info = ELF32_MS_INFO (0, 1);
8894 for (s = output_bfd->sections; s != NULL; s = s->next)
8896 long dynindx = elf_section_data (s)->dynindx;
8898 bfd_mips_elf_swap_msym_out
8899 (output_bfd, &msym,
8900 (((Elf32_External_Msym *) smsym->contents)
8901 + dynindx));
8905 if (SGI_COMPAT (output_bfd))
8907 /* Write .compact_rel section out. */
8908 s = bfd_get_section_by_name (dynobj, ".compact_rel");
8909 if (s != NULL)
8911 cpt.id1 = 1;
8912 cpt.num = s->reloc_count;
8913 cpt.id2 = 2;
8914 cpt.offset = (s->output_section->filepos
8915 + sizeof (Elf32_External_compact_rel));
8916 cpt.reserved0 = 0;
8917 cpt.reserved1 = 0;
8918 bfd_elf32_swap_compact_rel_out (output_bfd, &cpt,
8919 ((Elf32_External_compact_rel *)
8920 s->contents));
8922 /* Clean up a dummy stub function entry in .text. */
8923 s = bfd_get_section_by_name (dynobj,
8924 MIPS_ELF_STUB_SECTION_NAME (dynobj));
8925 if (s != NULL)
8927 file_ptr dummy_offset;
8929 BFD_ASSERT (s->_raw_size >= MIPS_FUNCTION_STUB_SIZE);
8930 dummy_offset = s->_raw_size - MIPS_FUNCTION_STUB_SIZE;
8931 memset (s->contents + dummy_offset, 0,
8932 MIPS_FUNCTION_STUB_SIZE);
8937 /* We need to sort the entries of the dynamic relocation section. */
8939 if (!ABI_64_P (output_bfd))
8941 asection *reldyn;
8943 reldyn = bfd_get_section_by_name (dynobj,
8944 MIPS_ELF_REL_DYN_SECTION_NAME (dynobj));
8945 if (reldyn != NULL && reldyn->reloc_count > 2)
8947 reldyn_sorting_bfd = output_bfd;
8948 qsort ((Elf32_External_Rel *) reldyn->contents + 1,
8949 (size_t) reldyn->reloc_count - 1,
8950 sizeof (Elf32_External_Rel), sort_dynamic_relocs);
8954 /* Clean up a first relocation in .rel.dyn. */
8955 s = bfd_get_section_by_name (dynobj,
8956 MIPS_ELF_REL_DYN_SECTION_NAME (dynobj));
8957 if (s != NULL && s->_raw_size > 0)
8958 memset (s->contents, 0, MIPS_ELF_REL_SIZE (dynobj));
8961 return true;
8964 /* This is almost identical to bfd_generic_get_... except that some
8965 MIPS relocations need to be handled specially. Sigh. */
8967 static bfd_byte *
8968 elf32_mips_get_relocated_section_contents (abfd, link_info, link_order, data,
8969 relocateable, symbols)
8970 bfd *abfd;
8971 struct bfd_link_info *link_info;
8972 struct bfd_link_order *link_order;
8973 bfd_byte *data;
8974 boolean relocateable;
8975 asymbol **symbols;
8977 /* Get enough memory to hold the stuff */
8978 bfd *input_bfd = link_order->u.indirect.section->owner;
8979 asection *input_section = link_order->u.indirect.section;
8981 long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section);
8982 arelent **reloc_vector = NULL;
8983 long reloc_count;
8985 if (reloc_size < 0)
8986 goto error_return;
8988 reloc_vector = (arelent **) bfd_malloc (reloc_size);
8989 if (reloc_vector == NULL && reloc_size != 0)
8990 goto error_return;
8992 /* read in the section */
8993 if (!bfd_get_section_contents (input_bfd,
8994 input_section,
8995 (PTR) data,
8997 input_section->_raw_size))
8998 goto error_return;
9000 /* We're not relaxing the section, so just copy the size info */
9001 input_section->_cooked_size = input_section->_raw_size;
9002 input_section->reloc_done = true;
9004 reloc_count = bfd_canonicalize_reloc (input_bfd,
9005 input_section,
9006 reloc_vector,
9007 symbols);
9008 if (reloc_count < 0)
9009 goto error_return;
9011 if (reloc_count > 0)
9013 arelent **parent;
9014 /* for mips */
9015 int gp_found;
9016 bfd_vma gp = 0x12345678; /* initialize just to shut gcc up */
9019 struct bfd_hash_entry *h;
9020 struct bfd_link_hash_entry *lh;
9021 /* Skip all this stuff if we aren't mixing formats. */
9022 if (abfd && input_bfd
9023 && abfd->xvec == input_bfd->xvec)
9024 lh = 0;
9025 else
9027 h = bfd_hash_lookup (&link_info->hash->table, "_gp", false, false);
9028 lh = (struct bfd_link_hash_entry *) h;
9030 lookup:
9031 if (lh)
9033 switch (lh->type)
9035 case bfd_link_hash_undefined:
9036 case bfd_link_hash_undefweak:
9037 case bfd_link_hash_common:
9038 gp_found = 0;
9039 break;
9040 case bfd_link_hash_defined:
9041 case bfd_link_hash_defweak:
9042 gp_found = 1;
9043 gp = lh->u.def.value;
9044 break;
9045 case bfd_link_hash_indirect:
9046 case bfd_link_hash_warning:
9047 lh = lh->u.i.link;
9048 /* @@FIXME ignoring warning for now */
9049 goto lookup;
9050 case bfd_link_hash_new:
9051 default:
9052 abort ();
9055 else
9056 gp_found = 0;
9058 /* end mips */
9059 for (parent = reloc_vector; *parent != (arelent *) NULL;
9060 parent++)
9062 char *error_message = (char *) NULL;
9063 bfd_reloc_status_type r;
9065 /* Specific to MIPS: Deal with relocation types that require
9066 knowing the gp of the output bfd. */
9067 asymbol *sym = *(*parent)->sym_ptr_ptr;
9068 if (bfd_is_abs_section (sym->section) && abfd)
9070 /* The special_function wouldn't get called anyways. */
9072 else if (!gp_found)
9074 /* The gp isn't there; let the special function code
9075 fall over on its own. */
9077 else if ((*parent)->howto->special_function
9078 == _bfd_mips_elf_gprel16_reloc)
9080 /* bypass special_function call */
9081 r = gprel16_with_gp (input_bfd, sym, *parent, input_section,
9082 relocateable, (PTR) data, gp);
9083 goto skip_bfd_perform_relocation;
9085 /* end mips specific stuff */
9087 r = bfd_perform_relocation (input_bfd,
9088 *parent,
9089 (PTR) data,
9090 input_section,
9091 relocateable ? abfd : (bfd *) NULL,
9092 &error_message);
9093 skip_bfd_perform_relocation:
9095 if (relocateable)
9097 asection *os = input_section->output_section;
9099 /* A partial link, so keep the relocs */
9100 os->orelocation[os->reloc_count] = *parent;
9101 os->reloc_count++;
9104 if (r != bfd_reloc_ok)
9106 switch (r)
9108 case bfd_reloc_undefined:
9109 if (!((*link_info->callbacks->undefined_symbol)
9110 (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
9111 input_bfd, input_section, (*parent)->address,
9112 true)))
9113 goto error_return;
9114 break;
9115 case bfd_reloc_dangerous:
9116 BFD_ASSERT (error_message != (char *) NULL);
9117 if (!((*link_info->callbacks->reloc_dangerous)
9118 (link_info, error_message, input_bfd, input_section,
9119 (*parent)->address)))
9120 goto error_return;
9121 break;
9122 case bfd_reloc_overflow:
9123 if (!((*link_info->callbacks->reloc_overflow)
9124 (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
9125 (*parent)->howto->name, (*parent)->addend,
9126 input_bfd, input_section, (*parent)->address)))
9127 goto error_return;
9128 break;
9129 case bfd_reloc_outofrange:
9130 default:
9131 abort ();
9132 break;
9138 if (reloc_vector != NULL)
9139 free (reloc_vector);
9140 return data;
9142 error_return:
9143 if (reloc_vector != NULL)
9144 free (reloc_vector);
9145 return NULL;
9147 #define bfd_elf32_bfd_get_relocated_section_contents \
9148 elf32_mips_get_relocated_section_contents
9150 /* ECOFF swapping routines. These are used when dealing with the
9151 .mdebug section, which is in the ECOFF debugging format. */
9152 static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap =
9154 /* Symbol table magic number. */
9155 magicSym,
9156 /* Alignment of debugging information. E.g., 4. */
9158 /* Sizes of external symbolic information. */
9159 sizeof (struct hdr_ext),
9160 sizeof (struct dnr_ext),
9161 sizeof (struct pdr_ext),
9162 sizeof (struct sym_ext),
9163 sizeof (struct opt_ext),
9164 sizeof (struct fdr_ext),
9165 sizeof (struct rfd_ext),
9166 sizeof (struct ext_ext),
9167 /* Functions to swap in external symbolic data. */
9168 ecoff_swap_hdr_in,
9169 ecoff_swap_dnr_in,
9170 ecoff_swap_pdr_in,
9171 ecoff_swap_sym_in,
9172 ecoff_swap_opt_in,
9173 ecoff_swap_fdr_in,
9174 ecoff_swap_rfd_in,
9175 ecoff_swap_ext_in,
9176 _bfd_ecoff_swap_tir_in,
9177 _bfd_ecoff_swap_rndx_in,
9178 /* Functions to swap out external symbolic data. */
9179 ecoff_swap_hdr_out,
9180 ecoff_swap_dnr_out,
9181 ecoff_swap_pdr_out,
9182 ecoff_swap_sym_out,
9183 ecoff_swap_opt_out,
9184 ecoff_swap_fdr_out,
9185 ecoff_swap_rfd_out,
9186 ecoff_swap_ext_out,
9187 _bfd_ecoff_swap_tir_out,
9188 _bfd_ecoff_swap_rndx_out,
9189 /* Function to read in symbolic data. */
9190 _bfd_mips_elf_read_ecoff_info
9193 #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec
9194 #define TARGET_LITTLE_NAME "elf32-littlemips"
9195 #define TARGET_BIG_SYM bfd_elf32_bigmips_vec
9196 #define TARGET_BIG_NAME "elf32-bigmips"
9197 #define ELF_ARCH bfd_arch_mips
9198 #define ELF_MACHINE_CODE EM_MIPS
9200 /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses
9201 a value of 0x1000, and we are compatible. */
9202 #define ELF_MAXPAGESIZE 0x1000
9204 #define elf_backend_collect true
9205 #define elf_backend_type_change_ok true
9206 #define elf_backend_can_gc_sections true
9207 #define elf_backend_sign_extend_vma true
9208 #define elf_info_to_howto mips_info_to_howto_rela
9209 #define elf_info_to_howto_rel mips_info_to_howto_rel
9210 #define elf_backend_sym_is_global mips_elf_sym_is_global
9211 #define elf_backend_object_p _bfd_mips_elf_object_p
9212 #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr
9213 #define elf_backend_fake_sections _bfd_mips_elf_fake_sections
9214 #define elf_backend_section_from_bfd_section \
9215 _bfd_mips_elf_section_from_bfd_section
9216 #define elf_backend_section_processing _bfd_mips_elf_section_processing
9217 #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing
9218 #define elf_backend_additional_program_headers \
9219 _bfd_mips_elf_additional_program_headers
9220 #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map
9221 #define elf_backend_final_write_processing \
9222 _bfd_mips_elf_final_write_processing
9223 #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap
9224 #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook
9225 #define elf_backend_create_dynamic_sections \
9226 _bfd_mips_elf_create_dynamic_sections
9227 #define elf_backend_check_relocs _bfd_mips_elf_check_relocs
9228 #define elf_backend_adjust_dynamic_symbol \
9229 _bfd_mips_elf_adjust_dynamic_symbol
9230 #define elf_backend_always_size_sections \
9231 _bfd_mips_elf_always_size_sections
9232 #define elf_backend_size_dynamic_sections \
9233 _bfd_mips_elf_size_dynamic_sections
9234 #define elf_backend_relocate_section _bfd_mips_elf_relocate_section
9235 #define elf_backend_link_output_symbol_hook \
9236 _bfd_mips_elf_link_output_symbol_hook
9237 #define elf_backend_finish_dynamic_symbol \
9238 _bfd_mips_elf_finish_dynamic_symbol
9239 #define elf_backend_finish_dynamic_sections \
9240 _bfd_mips_elf_finish_dynamic_sections
9241 #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook
9242 #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook
9244 #define elf_backend_got_header_size (4*MIPS_RESERVED_GOTNO)
9245 #define elf_backend_plt_header_size 0
9247 #define elf_backend_copy_indirect_symbol \
9248 _bfd_mips_elf_copy_indirect_symbol
9250 #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol
9252 #define bfd_elf32_bfd_is_local_label_name \
9253 mips_elf_is_local_label_name
9254 #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line
9255 #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents
9256 #define bfd_elf32_bfd_link_hash_table_create \
9257 _bfd_mips_elf_link_hash_table_create
9258 #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link
9259 #define bfd_elf32_bfd_copy_private_bfd_data \
9260 _bfd_mips_elf_copy_private_bfd_data
9261 #define bfd_elf32_bfd_merge_private_bfd_data \
9262 _bfd_mips_elf_merge_private_bfd_data
9263 #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
9264 #define bfd_elf32_bfd_print_private_bfd_data \
9265 _bfd_mips_elf_print_private_bfd_data
9266 #include "elf32-target.h"
9268 /* Support for traditional mips targets */
9270 #define INCLUDED_TARGET_FILE /* More a type of flag */
9272 #undef TARGET_LITTLE_SYM
9273 #undef TARGET_LITTLE_NAME
9274 #undef TARGET_BIG_SYM
9275 #undef TARGET_BIG_NAME
9277 #define TARGET_LITTLE_SYM bfd_elf32_tradlittlemips_vec
9278 #define TARGET_LITTLE_NAME "elf32-tradlittlemips"
9279 #define TARGET_BIG_SYM bfd_elf32_tradbigmips_vec
9280 #define TARGET_BIG_NAME "elf32-tradbigmips"
9282 /* Include the target file again for this target */
9283 #include "elf32-target.h"