| 1 | /* MIPS-specific support for 32-bit ELF |
| 2 | Copyright 1993, 94, 95, 96, 97, 98, 1999 Free Software Foundation, Inc. |
| 3 | |
| 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> |
| 10 | |
| 11 | This file is part of BFD, the Binary File Descriptor library. |
| 12 | |
| 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. |
| 17 | |
| 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. |
| 22 | |
| 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. */ |
| 26 | |
| 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. */ |
| 30 | |
| 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" |
| 38 | |
| 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" |
| 47 | |
| 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. */ |
| 50 | |
| 51 | struct mips_got_info |
| 52 | { |
| 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; |
| 62 | }; |
| 63 | |
| 64 | /* The MIPS ELF linker needs additional information for each symbol in |
| 65 | the global hash table. */ |
| 66 | |
| 67 | struct mips_elf_link_hash_entry |
| 68 | { |
| 69 | struct elf_link_hash_entry root; |
| 70 | |
| 71 | /* External symbol information. */ |
| 72 | EXTR esym; |
| 73 | |
| 74 | /* Number of R_MIPS_32, R_MIPS_REL32, or R_MIPS_64 relocs against |
| 75 | this symbol. */ |
| 76 | unsigned int possibly_dynamic_relocs; |
| 77 | |
| 78 | /* The index of the first dynamic relocation (in the .rel.dyn |
| 79 | section) against this symbol. */ |
| 80 | unsigned int min_dyn_reloc_index; |
| 81 | |
| 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; |
| 85 | |
| 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; |
| 89 | |
| 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; |
| 93 | |
| 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; |
| 97 | }; |
| 98 | |
| 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 *)); |
| 202 | |
| 203 | extern const bfd_target bfd_elf32_tradbigmips_vec; |
| 204 | |
| 205 | /* The level of IRIX compatibility we're striving for. */ |
| 206 | |
| 207 | typedef enum { |
| 208 | ict_none, |
| 209 | ict_irix5, |
| 210 | ict_irix6 |
| 211 | } irix_compat_t; |
| 212 | |
| 213 | /* This will be used when we sort the dynamic relocation records. */ |
| 214 | static bfd *reldyn_sorting_bfd; |
| 215 | |
| 216 | /* Nonzero if ABFD is using the N32 ABI. */ |
| 217 | |
| 218 | #define ABI_N32_P(abfd) \ |
| 219 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0) |
| 220 | |
| 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) |
| 225 | |
| 226 | /* Depending on the target vector we generate some version of Irix |
| 227 | executables or "normal" MIPS ELF ABI executables. */ |
| 228 | |
| 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)) |
| 232 | |
| 233 | /* Whether we are trying to be compatible with IRIX at all. */ |
| 234 | |
| 235 | #define SGI_COMPAT(abfd) \ |
| 236 | (IRIX_COMPAT (abfd) != ict_none) |
| 237 | |
| 238 | /* The name of the msym section. */ |
| 239 | #define MIPS_ELF_MSYM_SECTION_NAME(abfd) ".msym" |
| 240 | |
| 241 | /* The name of the srdata section. */ |
| 242 | #define MIPS_ELF_SRDATA_SECTION_NAME(abfd) ".srdata" |
| 243 | |
| 244 | /* The name of the options section. */ |
| 245 | #define MIPS_ELF_OPTIONS_SECTION_NAME(abfd) \ |
| 246 | (IRIX_COMPAT (abfd) == ict_irix6 ? ".MIPS.options" : ".options") |
| 247 | |
| 248 | /* The name of the stub section. */ |
| 249 | #define MIPS_ELF_STUB_SECTION_NAME(abfd) \ |
| 250 | (IRIX_COMPAT (abfd) == ict_irix6 ? ".MIPS.stubs" : ".stub") |
| 251 | |
| 252 | /* The name of the dynamic relocation section. */ |
| 253 | #define MIPS_ELF_REL_DYN_SECTION_NAME(abfd) ".rel.dyn" |
| 254 | |
| 255 | /* The size of an external REL relocation. */ |
| 256 | #define MIPS_ELF_REL_SIZE(abfd) \ |
| 257 | (get_elf_backend_data (abfd)->s->sizeof_rel) |
| 258 | |
| 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) |
| 262 | |
| 263 | /* The size of a GOT entry. */ |
| 264 | #define MIPS_ELF_GOT_SIZE(abfd) \ |
| 265 | (get_elf_backend_data (abfd)->s->arch_size / 8) |
| 266 | |
| 267 | /* The size of a symbol-table entry. */ |
| 268 | #define MIPS_ELF_SYM_SIZE(abfd) \ |
| 269 | (get_elf_backend_data (abfd)->s->sizeof_sym) |
| 270 | |
| 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) |
| 274 | |
| 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)) |
| 278 | |
| 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)) |
| 284 | |
| 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 |
| 297 | |
| 298 | /* The number of local .got entries we reserve. */ |
| 299 | #define MIPS_RESERVED_GOTNO (2) |
| 300 | |
| 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) |
| 316 | |
| 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. */ |
| 321 | |
| 322 | /* Names of sections which appear in the .dynsym section in an Irix 5 |
| 323 | executable. */ |
| 324 | |
| 325 | static const char * const mips_elf_dynsym_sec_names[] = |
| 326 | { |
| 327 | ".text", |
| 328 | ".init", |
| 329 | ".fini", |
| 330 | ".data", |
| 331 | ".rodata", |
| 332 | ".sdata", |
| 333 | ".sbss", |
| 334 | ".bss", |
| 335 | NULL |
| 336 | }; |
| 337 | |
| 338 | #define SIZEOF_MIPS_DYNSYM_SECNAMES \ |
| 339 | (sizeof mips_elf_dynsym_sec_names / sizeof mips_elf_dynsym_sec_names[0]) |
| 340 | |
| 341 | /* The number of entries in mips_elf_dynsym_sec_names which go in the |
| 342 | text segment. */ |
| 343 | |
| 344 | #define MIPS_TEXT_DYNSYM_SECNO (3) |
| 345 | |
| 346 | #endif /* 0 */ |
| 347 | |
| 348 | /* The names of the runtime procedure table symbols used on Irix 5. */ |
| 349 | |
| 350 | static const char * const mips_elf_dynsym_rtproc_names[] = |
| 351 | { |
| 352 | "_procedure_table", |
| 353 | "_procedure_string_table", |
| 354 | "_procedure_table_size", |
| 355 | NULL |
| 356 | }; |
| 357 | |
| 358 | /* These structures are used to generate the .compact_rel section on |
| 359 | Irix 5. */ |
| 360 | |
| 361 | typedef struct |
| 362 | { |
| 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; |
| 370 | |
| 371 | typedef struct |
| 372 | { |
| 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; |
| 380 | |
| 381 | typedef struct |
| 382 | { |
| 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; |
| 390 | |
| 391 | typedef struct |
| 392 | { |
| 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; |
| 399 | |
| 400 | typedef struct |
| 401 | { |
| 402 | bfd_byte info[4]; |
| 403 | bfd_byte konst[4]; |
| 404 | bfd_byte vaddr[4]; |
| 405 | } Elf32_External_crinfo; |
| 406 | |
| 407 | typedef struct |
| 408 | { |
| 409 | bfd_byte info[4]; |
| 410 | bfd_byte konst[4]; |
| 411 | } Elf32_External_crinfo2; |
| 412 | |
| 413 | /* These are the constants used to swap the bitfields in a crinfo. */ |
| 414 | |
| 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) |
| 423 | |
| 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 |
| 429 | |
| 430 | /* There are 4 types of compact relocation at least. The value KONST |
| 431 | has different meaning for each type: |
| 432 | |
| 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 |
| 438 | */ |
| 439 | |
| 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 |
| 444 | |
| 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) |
| 449 | |
| 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 *)); |
| 454 | |
| 455 | #define USE_REL 1 /* MIPS uses REL relocations instead of RELA */ |
| 456 | |
| 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) |
| 460 | |
| 461 | static reloc_howto_type elf_mips_howto_table[] = |
| 462 | { |
| 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 */ |
| 477 | |
| 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 */ |
| 492 | |
| 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 */ |
| 507 | |
| 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 */ |
| 522 | |
| 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 */ |
| 540 | |
| 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 */ |
| 555 | |
| 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 */ |
| 570 | |
| 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 */ |
| 585 | |
| 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 */ |
| 600 | |
| 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 */ |
| 615 | |
| 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 */ |
| 630 | |
| 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 */ |
| 645 | |
| 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 */ |
| 660 | |
| 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), |
| 666 | |
| 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 */ |
| 681 | |
| 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 */ |
| 698 | |
| 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 */ |
| 713 | |
| 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 */ |
| 728 | |
| 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 */ |
| 743 | |
| 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 */ |
| 758 | |
| 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 */ |
| 773 | |
| 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 */ |
| 788 | |
| 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 */ |
| 803 | |
| 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), |
| 808 | |
| 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 */ |
| 823 | |
| 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 */ |
| 838 | |
| 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 */ |
| 853 | |
| 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 */ |
| 868 | |
| 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 */ |
| 883 | |
| 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), |
| 888 | |
| 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 */ |
| 904 | }; |
| 905 | |
| 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 */ |
| 922 | |
| 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 */ |
| 941 | |
| 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 */ |
| 957 | |
| 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 */ |
| 974 | |
| 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 */ |
| 990 | |
| 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 */ |
| 1006 | |
| 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 */ |
| 1022 | |
| 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 */ |
| 1038 | |
| 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 */ |
| 1054 | |
| 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 */ |
| 1070 | |
| 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. */ |
| 1079 | |
| 1080 | struct mips_hi16 |
| 1081 | { |
| 1082 | struct mips_hi16 *next; |
| 1083 | bfd_byte *addr; |
| 1084 | bfd_vma addend; |
| 1085 | }; |
| 1086 | |
| 1087 | /* FIXME: This should not be a static variable. */ |
| 1088 | |
| 1089 | static struct mips_hi16 *mips_hi16_list; |
| 1090 | |
| 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; |
| 1106 | { |
| 1107 | bfd_reloc_status_type ret; |
| 1108 | bfd_vma relocation; |
| 1109 | struct mips_hi16 *n; |
| 1110 | |
| 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) |
| 1116 | { |
| 1117 | reloc_entry->address += input_section->output_offset; |
| 1118 | return bfd_reloc_ok; |
| 1119 | } |
| 1120 | |
| 1121 | ret = bfd_reloc_ok; |
| 1122 | |
| 1123 | if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
| 1124 | { |
| 1125 | boolean relocateable; |
| 1126 | bfd_vma gp; |
| 1127 | |
| 1128 | if (ret == bfd_reloc_undefined) |
| 1129 | abort (); |
| 1130 | |
| 1131 | if (output_bfd != NULL) |
| 1132 | relocateable = true; |
| 1133 | else |
| 1134 | { |
| 1135 | relocateable = false; |
| 1136 | output_bfd = symbol->section->output_section->owner; |
| 1137 | } |
| 1138 | |
| 1139 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, |
| 1140 | error_message, &gp); |
| 1141 | if (ret != bfd_reloc_ok) |
| 1142 | return ret; |
| 1143 | |
| 1144 | relocation = gp - reloc_entry->address; |
| 1145 | } |
| 1146 | else |
| 1147 | { |
| 1148 | if (bfd_is_und_section (symbol->section) |
| 1149 | && output_bfd == (bfd *) NULL) |
| 1150 | ret = bfd_reloc_undefined; |
| 1151 | |
| 1152 | if (bfd_is_com_section (symbol->section)) |
| 1153 | relocation = 0; |
| 1154 | else |
| 1155 | relocation = symbol->value; |
| 1156 | } |
| 1157 | |
| 1158 | relocation += symbol->section->output_section->vma; |
| 1159 | relocation += symbol->section->output_offset; |
| 1160 | relocation += reloc_entry->addend; |
| 1161 | |
| 1162 | if (reloc_entry->address > input_section->_cooked_size) |
| 1163 | return bfd_reloc_outofrange; |
| 1164 | |
| 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; |
| 1173 | |
| 1174 | if (output_bfd != (bfd *) NULL) |
| 1175 | reloc_entry->address += input_section->output_offset; |
| 1176 | |
| 1177 | return ret; |
| 1178 | } |
| 1179 | |
| 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. */ |
| 1183 | |
| 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; |
| 1199 | { |
| 1200 | arelent gp_disp_relent; |
| 1201 | |
| 1202 | if (mips_hi16_list != NULL) |
| 1203 | { |
| 1204 | struct mips_hi16 *l; |
| 1205 | |
| 1206 | l = mips_hi16_list; |
| 1207 | while (l != NULL) |
| 1208 | { |
| 1209 | unsigned long insn; |
| 1210 | unsigned long val; |
| 1211 | unsigned long vallo; |
| 1212 | struct mips_hi16 *next; |
| 1213 | |
| 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; |
| 1222 | |
| 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; |
| 1233 | |
| 1234 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); |
| 1235 | bfd_put_32 (abfd, insn, l->addr); |
| 1236 | |
| 1237 | if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
| 1238 | { |
| 1239 | gp_disp_relent = *reloc_entry; |
| 1240 | reloc_entry = &gp_disp_relent; |
| 1241 | reloc_entry->addend = l->addend; |
| 1242 | } |
| 1243 | |
| 1244 | next = l->next; |
| 1245 | free (l); |
| 1246 | l = next; |
| 1247 | } |
| 1248 | |
| 1249 | mips_hi16_list = NULL; |
| 1250 | } |
| 1251 | else if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
| 1252 | { |
| 1253 | bfd_reloc_status_type ret; |
| 1254 | bfd_vma gp, relocation; |
| 1255 | |
| 1256 | /* FIXME: Does this case ever occur? */ |
| 1257 | |
| 1258 | ret = mips_elf_final_gp (output_bfd, symbol, true, error_message, &gp); |
| 1259 | if (ret != bfd_reloc_ok) |
| 1260 | return ret; |
| 1261 | |
| 1262 | relocation = gp - reloc_entry->address; |
| 1263 | relocation += symbol->section->output_section->vma; |
| 1264 | relocation += symbol->section->output_offset; |
| 1265 | relocation += reloc_entry->addend; |
| 1266 | |
| 1267 | if (reloc_entry->address > input_section->_cooked_size) |
| 1268 | return bfd_reloc_outofrange; |
| 1269 | |
| 1270 | gp_disp_relent = *reloc_entry; |
| 1271 | reloc_entry = &gp_disp_relent; |
| 1272 | reloc_entry->addend = relocation - 4; |
| 1273 | } |
| 1274 | |
| 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); |
| 1278 | } |
| 1279 | |
| 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. |
| 1290 | |
| 1291 | This implementation suffices for the assembler, but the linker does |
| 1292 | not yet know how to create global offset tables. */ |
| 1293 | |
| 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; |
| 1309 | { |
| 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) |
| 1315 | { |
| 1316 | reloc_entry->address += input_section->output_offset; |
| 1317 | return bfd_reloc_ok; |
| 1318 | } |
| 1319 | |
| 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); |
| 1326 | |
| 1327 | abort (); |
| 1328 | } |
| 1329 | |
| 1330 | /* Set the GP value for OUTPUT_BFD. Returns false if this is a |
| 1331 | dangerous relocation. */ |
| 1332 | |
| 1333 | static boolean |
| 1334 | mips_elf_assign_gp (output_bfd, pgp) |
| 1335 | bfd *output_bfd; |
| 1336 | bfd_vma *pgp; |
| 1337 | { |
| 1338 | unsigned int count; |
| 1339 | asymbol **sym; |
| 1340 | unsigned int i; |
| 1341 | |
| 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; |
| 1346 | |
| 1347 | count = bfd_get_symcount (output_bfd); |
| 1348 | sym = bfd_get_outsymbols (output_bfd); |
| 1349 | |
| 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 |
| 1355 | { |
| 1356 | for (i = 0; i < count; i++, sym++) |
| 1357 | { |
| 1358 | register CONST char *name; |
| 1359 | |
| 1360 | name = bfd_asymbol_name (*sym); |
| 1361 | if (*name == '_' && strcmp (name, "_gp") == 0) |
| 1362 | { |
| 1363 | *pgp = bfd_asymbol_value (*sym); |
| 1364 | _bfd_set_gp_value (output_bfd, *pgp); |
| 1365 | break; |
| 1366 | } |
| 1367 | } |
| 1368 | } |
| 1369 | |
| 1370 | if (i >= count) |
| 1371 | { |
| 1372 | /* Only get the error once. */ |
| 1373 | *pgp = 4; |
| 1374 | _bfd_set_gp_value (output_bfd, *pgp); |
| 1375 | return false; |
| 1376 | } |
| 1377 | |
| 1378 | return true; |
| 1379 | } |
| 1380 | |
| 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. */ |
| 1386 | |
| 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; |
| 1394 | { |
| 1395 | if (bfd_is_und_section (symbol->section) |
| 1396 | && ! relocateable) |
| 1397 | { |
| 1398 | *pgp = 0; |
| 1399 | return bfd_reloc_undefined; |
| 1400 | } |
| 1401 | |
| 1402 | *pgp = _bfd_get_gp_value (output_bfd); |
| 1403 | if (*pgp == 0 |
| 1404 | && (! relocateable |
| 1405 | || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| 1406 | { |
| 1407 | if (relocateable) |
| 1408 | { |
| 1409 | /* Make up a value. */ |
| 1410 | *pgp = symbol->section->output_section->vma + 0x4000; |
| 1411 | _bfd_set_gp_value (output_bfd, *pgp); |
| 1412 | } |
| 1413 | else if (!mips_elf_assign_gp (output_bfd, pgp)) |
| 1414 | { |
| 1415 | *error_message = |
| 1416 | (char *) _("GP relative relocation when _gp not defined"); |
| 1417 | return bfd_reloc_dangerous; |
| 1418 | } |
| 1419 | } |
| 1420 | |
| 1421 | return bfd_reloc_ok; |
| 1422 | } |
| 1423 | |
| 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. */ |
| 1429 | |
| 1430 | static bfd_reloc_status_type gprel16_with_gp PARAMS ((bfd *, asymbol *, |
| 1431 | arelent *, asection *, |
| 1432 | boolean, PTR, bfd_vma)); |
| 1433 | |
| 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; |
| 1444 | { |
| 1445 | boolean relocateable; |
| 1446 | bfd_reloc_status_type ret; |
| 1447 | bfd_vma gp; |
| 1448 | |
| 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) |
| 1456 | { |
| 1457 | reloc_entry->address += input_section->output_offset; |
| 1458 | return bfd_reloc_ok; |
| 1459 | } |
| 1460 | |
| 1461 | if (output_bfd != (bfd *) NULL) |
| 1462 | relocateable = true; |
| 1463 | else |
| 1464 | { |
| 1465 | relocateable = false; |
| 1466 | output_bfd = symbol->section->output_section->owner; |
| 1467 | } |
| 1468 | |
| 1469 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, |
| 1470 | &gp); |
| 1471 | if (ret != bfd_reloc_ok) |
| 1472 | return ret; |
| 1473 | |
| 1474 | return gprel16_with_gp (abfd, symbol, reloc_entry, input_section, |
| 1475 | relocateable, data, gp); |
| 1476 | } |
| 1477 | |
| 1478 | static bfd_reloc_status_type |
| 1479 | gprel16_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, |
| 1480 | gp) |
| 1481 | bfd *abfd; |
| 1482 | asymbol *symbol; |
| 1483 | arelent *reloc_entry; |
| 1484 | asection *input_section; |
| 1485 | boolean relocateable; |
| 1486 | PTR data; |
| 1487 | bfd_vma gp; |
| 1488 | { |
| 1489 | bfd_vma relocation; |
| 1490 | unsigned long insn; |
| 1491 | unsigned long val; |
| 1492 | |
| 1493 | if (bfd_is_com_section (symbol->section)) |
| 1494 | relocation = 0; |
| 1495 | else |
| 1496 | relocation = symbol->value; |
| 1497 | |
| 1498 | relocation += symbol->section->output_section->vma; |
| 1499 | relocation += symbol->section->output_offset; |
| 1500 | |
| 1501 | if (reloc_entry->address > input_section->_cooked_size) |
| 1502 | return bfd_reloc_outofrange; |
| 1503 | |
| 1504 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1505 | |
| 1506 | /* Set val to the offset into the section or symbol. */ |
| 1507 | if (reloc_entry->howto->src_mask == 0) |
| 1508 | { |
| 1509 | /* This case occurs with the 64-bit MIPS ELF ABI. */ |
| 1510 | val = reloc_entry->addend; |
| 1511 | } |
| 1512 | else |
| 1513 | { |
| 1514 | val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff; |
| 1515 | if (val & 0x8000) |
| 1516 | val -= 0x10000; |
| 1517 | } |
| 1518 | |
| 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; |
| 1525 | |
| 1526 | insn = (insn &~ 0xffff) | (val & 0xffff); |
| 1527 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| 1528 | |
| 1529 | if (relocateable) |
| 1530 | reloc_entry->address += input_section->output_offset; |
| 1531 | |
| 1532 | /* Make sure it fit in 16 bits. */ |
| 1533 | if ((long) val >= 0x8000 || (long) val < -0x8000) |
| 1534 | return bfd_reloc_overflow; |
| 1535 | |
| 1536 | return bfd_reloc_ok; |
| 1537 | } |
| 1538 | |
| 1539 | /* Do a R_MIPS_GPREL32 relocation. Is this 32 bit value the offset |
| 1540 | from the gp register? XXX */ |
| 1541 | |
| 1542 | static bfd_reloc_status_type gprel32_with_gp PARAMS ((bfd *, asymbol *, |
| 1543 | arelent *, asection *, |
| 1544 | boolean, PTR, bfd_vma)); |
| 1545 | |
| 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; |
| 1561 | { |
| 1562 | boolean relocateable; |
| 1563 | bfd_reloc_status_type ret; |
| 1564 | bfd_vma gp; |
| 1565 | |
| 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) |
| 1573 | { |
| 1574 | *error_message = (char *) |
| 1575 | _("32bits gp relative relocation occurs for an external symbol"); |
| 1576 | return bfd_reloc_outofrange; |
| 1577 | } |
| 1578 | |
| 1579 | if (output_bfd != (bfd *) NULL) |
| 1580 | { |
| 1581 | relocateable = true; |
| 1582 | gp = _bfd_get_gp_value (output_bfd); |
| 1583 | } |
| 1584 | else |
| 1585 | { |
| 1586 | relocateable = false; |
| 1587 | output_bfd = symbol->section->output_section->owner; |
| 1588 | |
| 1589 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, |
| 1590 | error_message, &gp); |
| 1591 | if (ret != bfd_reloc_ok) |
| 1592 | return ret; |
| 1593 | } |
| 1594 | |
| 1595 | return gprel32_with_gp (abfd, symbol, reloc_entry, input_section, |
| 1596 | relocateable, data, gp); |
| 1597 | } |
| 1598 | |
| 1599 | static bfd_reloc_status_type |
| 1600 | gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, |
| 1601 | gp) |
| 1602 | bfd *abfd; |
| 1603 | asymbol *symbol; |
| 1604 | arelent *reloc_entry; |
| 1605 | asection *input_section; |
| 1606 | boolean relocateable; |
| 1607 | PTR data; |
| 1608 | bfd_vma gp; |
| 1609 | { |
| 1610 | bfd_vma relocation; |
| 1611 | unsigned long val; |
| 1612 | |
| 1613 | if (bfd_is_com_section (symbol->section)) |
| 1614 | relocation = 0; |
| 1615 | else |
| 1616 | relocation = symbol->value; |
| 1617 | |
| 1618 | relocation += symbol->section->output_section->vma; |
| 1619 | relocation += symbol->section->output_offset; |
| 1620 | |
| 1621 | if (reloc_entry->address > input_section->_cooked_size) |
| 1622 | return bfd_reloc_outofrange; |
| 1623 | |
| 1624 | if (reloc_entry->howto->src_mask == 0) |
| 1625 | { |
| 1626 | /* This case arises with the 64-bit MIPS ELF ABI. */ |
| 1627 | val = 0; |
| 1628 | } |
| 1629 | else |
| 1630 | val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1631 | |
| 1632 | /* Set val to the offset into the section or symbol. */ |
| 1633 | val += reloc_entry->addend; |
| 1634 | |
| 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; |
| 1641 | |
| 1642 | bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address); |
| 1643 | |
| 1644 | if (relocateable) |
| 1645 | reloc_entry->address += input_section->output_offset; |
| 1646 | |
| 1647 | return bfd_reloc_ok; |
| 1648 | } |
| 1649 | |
| 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. */ |
| 1653 | |
| 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; |
| 1664 | { |
| 1665 | bfd_reloc_status_type r; |
| 1666 | arelent reloc32; |
| 1667 | unsigned long val; |
| 1668 | bfd_size_type addr; |
| 1669 | |
| 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; |
| 1674 | |
| 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); |
| 1682 | |
| 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); |
| 1693 | |
| 1694 | return r; |
| 1695 | } |
| 1696 | |
| 1697 | /* Handle a mips16 jump. */ |
| 1698 | |
| 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; |
| 1709 | { |
| 1710 | if (output_bfd != (bfd *) NULL |
| 1711 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1712 | && reloc_entry->addend == 0) |
| 1713 | { |
| 1714 | reloc_entry->address += input_section->output_offset; |
| 1715 | return bfd_reloc_ok; |
| 1716 | } |
| 1717 | |
| 1718 | /* FIXME. */ |
| 1719 | { |
| 1720 | static boolean warned; |
| 1721 | |
| 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; |
| 1727 | } |
| 1728 | |
| 1729 | return bfd_reloc_undefined; |
| 1730 | } |
| 1731 | |
| 1732 | /* Handle a mips16 GP relative reloc. */ |
| 1733 | |
| 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; |
| 1744 | { |
| 1745 | boolean relocateable; |
| 1746 | bfd_reloc_status_type ret; |
| 1747 | bfd_vma gp; |
| 1748 | unsigned short extend, insn; |
| 1749 | unsigned long final; |
| 1750 | |
| 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) |
| 1758 | { |
| 1759 | reloc_entry->address += input_section->output_offset; |
| 1760 | return bfd_reloc_ok; |
| 1761 | } |
| 1762 | |
| 1763 | if (output_bfd != NULL) |
| 1764 | relocateable = true; |
| 1765 | else |
| 1766 | { |
| 1767 | relocateable = false; |
| 1768 | output_bfd = symbol->section->output_section->owner; |
| 1769 | } |
| 1770 | |
| 1771 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, |
| 1772 | &gp); |
| 1773 | if (ret != bfd_reloc_ok) |
| 1774 | return ret; |
| 1775 | |
| 1776 | if (reloc_entry->address > input_section->_cooked_size) |
| 1777 | return bfd_reloc_outofrange; |
| 1778 | |
| 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); |
| 1782 | |
| 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); |
| 1790 | |
| 1791 | ret = gprel16_with_gp (abfd, symbol, reloc_entry, input_section, |
| 1792 | relocateable, data, gp); |
| 1793 | |
| 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); |
| 1804 | |
| 1805 | return ret; |
| 1806 | } |
| 1807 | |
| 1808 | /* Return the ISA for a MIPS e_flags value. */ |
| 1809 | |
| 1810 | static INLINE int |
| 1811 | elf_mips_isa (flags) |
| 1812 | flagword flags; |
| 1813 | { |
| 1814 | switch (flags & EF_MIPS_ARCH) |
| 1815 | { |
| 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; |
| 1824 | } |
| 1825 | return 4; |
| 1826 | } |
| 1827 | |
| 1828 | /* Return the MACH for a MIPS e_flags value. */ |
| 1829 | |
| 1830 | static INLINE int |
| 1831 | elf_mips_mach (flags) |
| 1832 | flagword flags; |
| 1833 | { |
| 1834 | switch (flags & EF_MIPS_MACH) |
| 1835 | { |
| 1836 | case E_MIPS_MACH_3900: |
| 1837 | return bfd_mach_mips3900; |
| 1838 | |
| 1839 | case E_MIPS_MACH_4010: |
| 1840 | return bfd_mach_mips4010; |
| 1841 | |
| 1842 | case E_MIPS_MACH_4100: |
| 1843 | return bfd_mach_mips4100; |
| 1844 | |
| 1845 | case E_MIPS_MACH_4111: |
| 1846 | return bfd_mach_mips4111; |
| 1847 | |
| 1848 | case E_MIPS_MACH_4650: |
| 1849 | return bfd_mach_mips4650; |
| 1850 | |
| 1851 | default: |
| 1852 | switch (flags & EF_MIPS_ARCH) |
| 1853 | { |
| 1854 | default: |
| 1855 | case E_MIPS_ARCH_1: |
| 1856 | return bfd_mach_mips3000; |
| 1857 | break; |
| 1858 | |
| 1859 | case E_MIPS_ARCH_2: |
| 1860 | return bfd_mach_mips6000; |
| 1861 | break; |
| 1862 | |
| 1863 | case E_MIPS_ARCH_3: |
| 1864 | return bfd_mach_mips4000; |
| 1865 | break; |
| 1866 | |
| 1867 | case E_MIPS_ARCH_4: |
| 1868 | return bfd_mach_mips8000; |
| 1869 | break; |
| 1870 | } |
| 1871 | } |
| 1872 | |
| 1873 | return 0; |
| 1874 | } |
| 1875 | |
| 1876 | /* Return printable name for ABI. */ |
| 1877 | |
| 1878 | static INLINE char* |
| 1879 | elf_mips_abi_name (abfd) |
| 1880 | bfd *abfd; |
| 1881 | { |
| 1882 | flagword flags; |
| 1883 | |
| 1884 | if (ABI_N32_P (abfd)) |
| 1885 | return "N32"; |
| 1886 | else if (ABI_64_P (abfd)) |
| 1887 | return "64"; |
| 1888 | |
| 1889 | flags = elf_elfheader (abfd)->e_flags; |
| 1890 | switch (flags & EF_MIPS_ABI) |
| 1891 | { |
| 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"; |
| 1904 | } |
| 1905 | } |
| 1906 | |
| 1907 | /* A mapping from BFD reloc types to MIPS ELF reloc types. */ |
| 1908 | |
| 1909 | struct elf_reloc_map { |
| 1910 | bfd_reloc_code_real_type bfd_reloc_val; |
| 1911 | enum elf_mips_reloc_type elf_reloc_val; |
| 1912 | }; |
| 1913 | |
| 1914 | static CONST struct elf_reloc_map mips_reloc_map[] = |
| 1915 | { |
| 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 } |
| 1937 | }; |
| 1938 | |
| 1939 | /* Given a BFD reloc type, return a howto structure. */ |
| 1940 | |
| 1941 | static reloc_howto_type * |
| 1942 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) |
| 1943 | bfd *abfd; |
| 1944 | bfd_reloc_code_real_type code; |
| 1945 | { |
| 1946 | unsigned int i; |
| 1947 | |
| 1948 | for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); i++) |
| 1949 | { |
| 1950 | if (mips_reloc_map[i].bfd_reloc_val == code) |
| 1951 | return &elf_mips_howto_table[(int) mips_reloc_map[i].elf_reloc_val]; |
| 1952 | } |
| 1953 | |
| 1954 | switch (code) |
| 1955 | { |
| 1956 | default: |
| 1957 | bfd_set_error (bfd_error_bad_value); |
| 1958 | return NULL; |
| 1959 | |
| 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; |
| 1968 | |
| 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; |
| 1987 | } |
| 1988 | } |
| 1989 | |
| 1990 | /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */ |
| 1991 | |
| 1992 | static reloc_howto_type * |
| 1993 | mips_rtype_to_howto (r_type) |
| 1994 | unsigned int r_type; |
| 1995 | { |
| 1996 | switch (r_type) |
| 1997 | { |
| 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; |
| 2025 | |
| 2026 | default: |
| 2027 | BFD_ASSERT (r_type < (unsigned int) R_MIPS_max); |
| 2028 | return &elf_mips_howto_table[r_type]; |
| 2029 | break; |
| 2030 | } |
| 2031 | } |
| 2032 | |
| 2033 | /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */ |
| 2034 | |
| 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; |
| 2040 | { |
| 2041 | unsigned int r_type; |
| 2042 | |
| 2043 | r_type = ELF32_R_TYPE (dst->r_info); |
| 2044 | cache_ptr->howto = mips_rtype_to_howto (r_type); |
| 2045 | |
| 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); |
| 2054 | } |
| 2055 | |
| 2056 | /* Given a MIPS Elf32_Internal_Rela, fill in an arelent structure. */ |
| 2057 | |
| 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; |
| 2063 | { |
| 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); |
| 2068 | |
| 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. */ |
| 2071 | } |
| 2072 | \f |
| 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. */ |
| 2076 | |
| 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; |
| 2082 | { |
| 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); |
| 2089 | } |
| 2090 | |
| 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; |
| 2096 | { |
| 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); |
| 2109 | } |
| 2110 | |
| 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. */ |
| 2116 | |
| 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; |
| 2122 | { |
| 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); |
| 2130 | } |
| 2131 | |
| 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; |
| 2137 | { |
| 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); |
| 2152 | } |
| 2153 | |
| 2154 | /* Swap an entry in a .gptab section. Note that these routines rely |
| 2155 | on the equivalence of the two elements of the union. */ |
| 2156 | |
| 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; |
| 2162 | { |
| 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); |
| 2165 | } |
| 2166 | |
| 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; |
| 2172 | { |
| 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); |
| 2177 | } |
| 2178 | |
| 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; |
| 2184 | { |
| 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); |
| 2191 | } |
| 2192 | |
| 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; |
| 2198 | { |
| 2199 | unsigned long l; |
| 2200 | |
| 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); |
| 2208 | } |
| 2209 | |
| 2210 | /* Swap in an options header. */ |
| 2211 | |
| 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; |
| 2217 | { |
| 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); |
| 2222 | } |
| 2223 | |
| 2224 | /* Swap out an options header. */ |
| 2225 | |
| 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; |
| 2231 | { |
| 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); |
| 2236 | } |
| 2237 | #if 0 |
| 2238 | /* Swap in an MSYM entry. */ |
| 2239 | |
| 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; |
| 2245 | { |
| 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); |
| 2248 | } |
| 2249 | #endif |
| 2250 | /* Swap out an MSYM entry. */ |
| 2251 | |
| 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; |
| 2257 | { |
| 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); |
| 2260 | } |
| 2261 | |
| 2262 | \f |
| 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. */ |
| 2268 | |
| 2269 | /*ARGSUSED*/ |
| 2270 | static boolean |
| 2271 | mips_elf_sym_is_global (abfd, sym) |
| 2272 | bfd *abfd ATTRIBUTE_UNUSED; |
| 2273 | asymbol *sym; |
| 2274 | { |
| 2275 | return (sym->flags & BSF_SECTION_SYM) == 0 ? true : false; |
| 2276 | } |
| 2277 | \f |
| 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. */ |
| 2280 | |
| 2281 | boolean |
| 2282 | _bfd_mips_elf_object_p (abfd) |
| 2283 | bfd *abfd; |
| 2284 | { |
| 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; |
| 2289 | |
| 2290 | bfd_default_set_arch_mach (abfd, bfd_arch_mips, |
| 2291 | elf_mips_mach (elf_elfheader (abfd)->e_flags)); |
| 2292 | return true; |
| 2293 | } |
| 2294 | |
| 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. */ |
| 2298 | |
| 2299 | /*ARGSUSED*/ |
| 2300 | void |
| 2301 | _bfd_mips_elf_final_write_processing (abfd, linker) |
| 2302 | bfd *abfd; |
| 2303 | boolean linker ATTRIBUTE_UNUSED; |
| 2304 | { |
| 2305 | unsigned long val; |
| 2306 | unsigned int i; |
| 2307 | Elf_Internal_Shdr **hdrpp; |
| 2308 | const char *name; |
| 2309 | asection *sec; |
| 2310 | |
| 2311 | switch (bfd_get_mach (abfd)) |
| 2312 | { |
| 2313 | default: |
| 2314 | case bfd_mach_mips3000: |
| 2315 | val = E_MIPS_ARCH_1; |
| 2316 | break; |
| 2317 | |
| 2318 | case bfd_mach_mips3900: |
| 2319 | val = E_MIPS_ARCH_1 | E_MIPS_MACH_3900; |
| 2320 | break; |
| 2321 | |
| 2322 | case bfd_mach_mips6000: |
| 2323 | val = E_MIPS_ARCH_2; |
| 2324 | break; |
| 2325 | |
| 2326 | case bfd_mach_mips4000: |
| 2327 | case bfd_mach_mips4300: |
| 2328 | val = E_MIPS_ARCH_3; |
| 2329 | break; |
| 2330 | |
| 2331 | case bfd_mach_mips4010: |
| 2332 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_4010; |
| 2333 | break; |
| 2334 | |
| 2335 | case bfd_mach_mips4100: |
| 2336 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_4100; |
| 2337 | break; |
| 2338 | |
| 2339 | case bfd_mach_mips4111: |
| 2340 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_4111; |
| 2341 | break; |
| 2342 | |
| 2343 | case bfd_mach_mips4650: |
| 2344 | val = E_MIPS_ARCH_3 | E_MIPS_MACH_4650; |
| 2345 | break; |
| 2346 | |
| 2347 | case bfd_mach_mips8000: |
| 2348 | val = E_MIPS_ARCH_4; |
| 2349 | break; |
| 2350 | } |
| 2351 | |
| 2352 | elf_elfheader (abfd)->e_flags &= ~ (EF_MIPS_ARCH | EF_MIPS_MACH); |
| 2353 | elf_elfheader (abfd)->e_flags |= val; |
| 2354 | |
| 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++) |
| 2360 | { |
| 2361 | switch ((*hdrpp)->sh_type) |
| 2362 | { |
| 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; |
| 2369 | |
| 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; |
| 2379 | |
| 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; |
| 2391 | |
| 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; |
| 2400 | |
| 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 |
| 2409 | { |
| 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)); |
| 2415 | } |
| 2416 | BFD_ASSERT (sec != NULL); |
| 2417 | (*hdrpp)->sh_link = elf_section_data (sec)->this_idx; |
| 2418 | break; |
| 2419 | |
| 2420 | } |
| 2421 | } |
| 2422 | } |
| 2423 | \f |
| 2424 | /* Function to keep MIPS specific file flags like as EF_MIPS_PIC. */ |
| 2425 | |
| 2426 | boolean |
| 2427 | _bfd_mips_elf_set_private_flags (abfd, flags) |
| 2428 | bfd *abfd; |
| 2429 | flagword flags; |
| 2430 | { |
| 2431 | BFD_ASSERT (!elf_flags_init (abfd) |
| 2432 | || elf_elfheader (abfd)->e_flags == flags); |
| 2433 | |
| 2434 | elf_elfheader (abfd)->e_flags = flags; |
| 2435 | elf_flags_init (abfd) = true; |
| 2436 | return true; |
| 2437 | } |
| 2438 | |
| 2439 | /* Copy backend specific data from one object module to another */ |
| 2440 | |
| 2441 | boolean |
| 2442 | _bfd_mips_elf_copy_private_bfd_data (ibfd, obfd) |
| 2443 | bfd *ibfd; |
| 2444 | bfd *obfd; |
| 2445 | { |
| 2446 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 2447 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 2448 | return true; |
| 2449 | |
| 2450 | BFD_ASSERT (!elf_flags_init (obfd) |
| 2451 | || (elf_elfheader (obfd)->e_flags |
| 2452 | == elf_elfheader (ibfd)->e_flags)); |
| 2453 | |
| 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; |
| 2458 | } |
| 2459 | |
| 2460 | /* Merge backend specific data from an object file to the output |
| 2461 | object file when linking. */ |
| 2462 | |
| 2463 | boolean |
| 2464 | _bfd_mips_elf_merge_private_bfd_data (ibfd, obfd) |
| 2465 | bfd *ibfd; |
| 2466 | bfd *obfd; |
| 2467 | { |
| 2468 | flagword old_flags; |
| 2469 | flagword new_flags; |
| 2470 | boolean ok; |
| 2471 | |
| 2472 | /* Check if we have the same endianess */ |
| 2473 | if (_bfd_generic_verify_endian_match (ibfd, obfd) == false) |
| 2474 | return false; |
| 2475 | |
| 2476 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 2477 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 2478 | return true; |
| 2479 | |
| 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; |
| 2483 | |
| 2484 | if (! elf_flags_init (obfd)) |
| 2485 | { |
| 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]; |
| 2490 | |
| 2491 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 2492 | && bfd_get_arch_info (obfd)->the_default) |
| 2493 | { |
| 2494 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
| 2495 | bfd_get_mach (ibfd))) |
| 2496 | return false; |
| 2497 | } |
| 2498 | |
| 2499 | return true; |
| 2500 | } |
| 2501 | |
| 2502 | /* Check flag compatibility. */ |
| 2503 | |
| 2504 | new_flags &= ~EF_MIPS_NOREORDER; |
| 2505 | old_flags &= ~EF_MIPS_NOREORDER; |
| 2506 | |
| 2507 | if (new_flags == old_flags) |
| 2508 | return true; |
| 2509 | |
| 2510 | ok = true; |
| 2511 | |
| 2512 | if ((new_flags & EF_MIPS_PIC) != (old_flags & EF_MIPS_PIC)) |
| 2513 | { |
| 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; |
| 2520 | } |
| 2521 | |
| 2522 | if ((new_flags & EF_MIPS_CPIC) != (old_flags & EF_MIPS_CPIC)) |
| 2523 | { |
| 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; |
| 2530 | } |
| 2531 | |
| 2532 | /* Compare the ISA's. */ |
| 2533 | if ((new_flags & (EF_MIPS_ARCH | EF_MIPS_MACH)) |
| 2534 | != (old_flags & (EF_MIPS_ARCH | EF_MIPS_MACH))) |
| 2535 | { |
| 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); |
| 2540 | |
| 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 |
| 2546 | ) |
| 2547 | { |
| 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. */ |
| 2551 | |
| 2552 | if ((new_isa == 1 || new_isa == 2) |
| 2553 | ? (old_isa != 1 && old_isa != 2) |
| 2554 | : (old_isa == 1 || old_isa == 2)) |
| 2555 | { |
| 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; |
| 2560 | } |
| 2561 | } |
| 2562 | |
| 2563 | else |
| 2564 | { |
| 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; |
| 2571 | } |
| 2572 | |
| 2573 | new_flags &= ~ (EF_MIPS_ARCH | EF_MIPS_MACH); |
| 2574 | old_flags &= ~ (EF_MIPS_ARCH | EF_MIPS_MACH); |
| 2575 | } |
| 2576 | |
| 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])) |
| 2582 | { |
| 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])) |
| 2587 | { |
| 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; |
| 2594 | } |
| 2595 | new_flags &= ~EF_MIPS_ABI; |
| 2596 | old_flags &= ~EF_MIPS_ABI; |
| 2597 | } |
| 2598 | |
| 2599 | /* Warn about any other mismatches */ |
| 2600 | if (new_flags != old_flags) |
| 2601 | { |
| 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; |
| 2607 | } |
| 2608 | |
| 2609 | if (! ok) |
| 2610 | { |
| 2611 | bfd_set_error (bfd_error_bad_value); |
| 2612 | return false; |
| 2613 | } |
| 2614 | |
| 2615 | return true; |
| 2616 | } |
| 2617 | \f |
| 2618 | boolean |
| 2619 | _bfd_mips_elf_print_private_bfd_data (abfd, ptr) |
| 2620 | bfd *abfd; |
| 2621 | PTR ptr; |
| 2622 | { |
| 2623 | FILE *file = (FILE *) ptr; |
| 2624 | |
| 2625 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 2626 | |
| 2627 | /* Print normal ELF private data. */ |
| 2628 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 2629 | |
| 2630 | /* xgettext:c-format */ |
| 2631 | fprintf (file, _ ("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 2632 | |
| 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]")); |
| 2649 | |
| 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]")); |
| 2660 | |
| 2661 | if (elf_elfheader (abfd)->e_flags & EF_MIPS_32BITMODE) |
| 2662 | fprintf (file, _ (" [32bitmode]")); |
| 2663 | else |
| 2664 | fprintf (file, _ (" [not 32bitmode]")); |
| 2665 | |
| 2666 | fputc ('\n', file); |
| 2667 | |
| 2668 | return true; |
| 2669 | } |
| 2670 | \f |
| 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. |
| 2674 | |
| 2675 | FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure |
| 2676 | how to. */ |
| 2677 | |
| 2678 | boolean |
| 2679 | _bfd_mips_elf_section_from_shdr (abfd, hdr, name) |
| 2680 | bfd *abfd; |
| 2681 | Elf_Internal_Shdr *hdr; |
| 2682 | char *name; |
| 2683 | { |
| 2684 | flagword flags = 0; |
| 2685 | |
| 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) |
| 2692 | { |
| 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; |
| 2752 | } |
| 2753 | |
| 2754 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 2755 | return false; |
| 2756 | |
| 2757 | if (flags) |
| 2758 | { |
| 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; |
| 2764 | } |
| 2765 | |
| 2766 | /* FIXME: We should record sh_info for a .gptab section. */ |
| 2767 | |
| 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) |
| 2773 | { |
| 2774 | Elf32_External_RegInfo ext; |
| 2775 | Elf32_RegInfo s; |
| 2776 | |
| 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; |
| 2782 | } |
| 2783 | |
| 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) |
| 2789 | { |
| 2790 | bfd_byte *contents, *l, *lend; |
| 2791 | |
| 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)) |
| 2797 | { |
| 2798 | free (contents); |
| 2799 | return false; |
| 2800 | } |
| 2801 | l = contents; |
| 2802 | lend = contents + hdr->sh_size; |
| 2803 | while (l + sizeof (Elf_External_Options) <= lend) |
| 2804 | { |
| 2805 | Elf_Internal_Options intopt; |
| 2806 | |
| 2807 | bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l, |
| 2808 | &intopt); |
| 2809 | if (ABI_64_P (abfd) && intopt.kind == ODK_REGINFO) |
| 2810 | { |
| 2811 | Elf64_Internal_RegInfo intreg; |
| 2812 | |
| 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; |
| 2819 | } |
| 2820 | else if (intopt.kind == ODK_REGINFO) |
| 2821 | { |
| 2822 | Elf32_RegInfo intreg; |
| 2823 | |
| 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; |
| 2830 | } |
| 2831 | l += intopt.size; |
| 2832 | } |
| 2833 | free (contents); |
| 2834 | } |
| 2835 | |
| 2836 | return true; |
| 2837 | } |
| 2838 | |
| 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. */ |
| 2842 | |
| 2843 | boolean |
| 2844 | _bfd_mips_elf_fake_sections (abfd, hdr, sec) |
| 2845 | bfd *abfd; |
| 2846 | Elf32_Internal_Shdr *hdr; |
| 2847 | asection *sec; |
| 2848 | { |
| 2849 | register const char *name; |
| 2850 | |
| 2851 | name = bfd_get_section_name (abfd, sec); |
| 2852 | |
| 2853 | if (strcmp (name, ".liblist") == 0) |
| 2854 | { |
| 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. */ |
| 2858 | } |
| 2859 | else if (strcmp (name, ".conflict") == 0) |
| 2860 | hdr->sh_type = SHT_MIPS_CONFLICT; |
| 2861 | else if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0) |
| 2862 | { |
| 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. */ |
| 2866 | } |
| 2867 | else if (strcmp (name, ".ucode") == 0) |
| 2868 | hdr->sh_type = SHT_MIPS_UCODE; |
| 2869 | else if (strcmp (name, ".mdebug") == 0) |
| 2870 | { |
| 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; |
| 2878 | } |
| 2879 | else if (strcmp (name, ".reginfo") == 0) |
| 2880 | { |
| 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)) |
| 2885 | { |
| 2886 | if ((abfd->flags & DYNAMIC) != 0) |
| 2887 | hdr->sh_entsize = sizeof (Elf32_External_RegInfo); |
| 2888 | else |
| 2889 | hdr->sh_entsize = 1; |
| 2890 | } |
| 2891 | else |
| 2892 | hdr->sh_entsize = sizeof (Elf32_External_RegInfo); |
| 2893 | } |
| 2894 | else if (SGI_COMPAT (abfd) |
| 2895 | && (strcmp (name, ".hash") == 0 |
| 2896 | || strcmp (name, ".dynamic") == 0 |
| 2897 | || strcmp (name, ".dynstr") == 0)) |
| 2898 | { |
| 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 |
| 2905 | } |
| 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) |
| 2914 | { |
| 2915 | hdr->sh_type = SHT_MIPS_IFACE; |
| 2916 | hdr->sh_flags |= SHF_MIPS_NOSTRIP; |
| 2917 | } |
| 2918 | else if (strncmp (name, ".MIPS.content", strlen (".MIPS.content")) == 0) |
| 2919 | { |
| 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. */ |
| 2923 | } |
| 2924 | else if (strcmp (name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0) |
| 2925 | { |
| 2926 | hdr->sh_type = SHT_MIPS_OPTIONS; |
| 2927 | hdr->sh_entsize = 1; |
| 2928 | hdr->sh_flags |= SHF_MIPS_NOSTRIP; |
| 2929 | } |
| 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) |
| 2933 | { |
| 2934 | hdr->sh_type = SHT_MIPS_SYMBOL_LIB; |
| 2935 | /* The sh_link and sh_info fields are set in |
| 2936 | final_write_processing. */ |
| 2937 | } |
| 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) |
| 2941 | { |
| 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. */ |
| 2945 | } |
| 2946 | else if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (abfd)) == 0) |
| 2947 | { |
| 2948 | hdr->sh_type = SHT_MIPS_MSYM; |
| 2949 | hdr->sh_flags |= SHF_ALLOC; |
| 2950 | hdr->sh_entsize = 8; |
| 2951 | } |
| 2952 | |
| 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) |
| 2957 | { |
| 2958 | struct bfd_elf_section_data *esd; |
| 2959 | |
| 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); |
| 2968 | } |
| 2969 | |
| 2970 | return true; |
| 2971 | } |
| 2972 | |
| 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. */ |
| 2978 | |
| 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; |
| 2985 | { |
| 2986 | if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) |
| 2987 | { |
| 2988 | *retval = SHN_MIPS_SCOMMON; |
| 2989 | return true; |
| 2990 | } |
| 2991 | if (strcmp (bfd_get_section_name (abfd, sec), ".acommon") == 0) |
| 2992 | { |
| 2993 | *retval = SHN_MIPS_ACOMMON; |
| 2994 | return true; |
| 2995 | } |
| 2996 | return false; |
| 2997 | } |
| 2998 | |
| 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. */ |
| 3002 | |
| 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; |
| 3010 | { |
| 3011 | if (strcmp (section->name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0) |
| 3012 | { |
| 3013 | bfd_byte *c; |
| 3014 | |
| 3015 | if (elf_section_data (section) == NULL) |
| 3016 | { |
| 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; |
| 3021 | } |
| 3022 | c = (bfd_byte *) elf_section_data (section)->tdata; |
| 3023 | if (c == NULL) |
| 3024 | { |
| 3025 | bfd_size_type size; |
| 3026 | |
| 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; |
| 3035 | } |
| 3036 | |
| 3037 | memcpy (c + offset, location, count); |
| 3038 | } |
| 3039 | |
| 3040 | return _bfd_elf_set_section_contents (abfd, section, location, offset, |
| 3041 | count); |
| 3042 | } |
| 3043 | |
| 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. */ |
| 3048 | |
| 3049 | boolean |
| 3050 | _bfd_mips_elf_section_processing (abfd, hdr) |
| 3051 | bfd *abfd; |
| 3052 | Elf_Internal_Shdr *hdr; |
| 3053 | { |
| 3054 | if (hdr->sh_type == SHT_MIPS_REGINFO |
| 3055 | && hdr->sh_size > 0) |
| 3056 | { |
| 3057 | bfd_byte buf[4]; |
| 3058 | |
| 3059 | BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo)); |
| 3060 | BFD_ASSERT (hdr->contents == NULL); |
| 3061 | |
| 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; |
| 3069 | } |
| 3070 | |
| 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) |
| 3075 | { |
| 3076 | bfd_byte *contents, *l, *lend; |
| 3077 | |
| 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. */ |
| 3084 | |
| 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) |
| 3089 | { |
| 3090 | Elf_Internal_Options intopt; |
| 3091 | |
| 3092 | bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l, |
| 3093 | &intopt); |
| 3094 | if (ABI_64_P (abfd) && intopt.kind == ODK_REGINFO) |
| 3095 | { |
| 3096 | bfd_byte buf[8]; |
| 3097 | |
| 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; |
| 3108 | } |
| 3109 | else if (intopt.kind == ODK_REGINFO) |
| 3110 | { |
| 3111 | bfd_byte buf[4]; |
| 3112 | |
| 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; |
| 3123 | } |
| 3124 | l += intopt.size; |
| 3125 | } |
| 3126 | } |
| 3127 | |
| 3128 | if (hdr->bfd_section != NULL) |
| 3129 | { |
| 3130 | const char *name = bfd_get_section_name (abfd, hdr->bfd_section); |
| 3131 | |
| 3132 | if (strcmp (name, ".sdata") == 0 |
| 3133 | || strcmp (name, ".lit8") == 0 |
| 3134 | || strcmp (name, ".lit4") == 0) |
| 3135 | { |
| 3136 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; |
| 3137 | hdr->sh_type = SHT_PROGBITS; |
| 3138 | } |
| 3139 | else if (strcmp (name, ".sbss") == 0) |
| 3140 | { |
| 3141 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; |
| 3142 | hdr->sh_type = SHT_NOBITS; |
| 3143 | } |
| 3144 | else if (strcmp (name, MIPS_ELF_SRDATA_SECTION_NAME (abfd)) == 0) |
| 3145 | { |
| 3146 | hdr->sh_flags |= SHF_ALLOC | SHF_MIPS_GPREL; |
| 3147 | hdr->sh_type = SHT_PROGBITS; |
| 3148 | } |
| 3149 | else if (strcmp (name, ".compact_rel") == 0) |
| 3150 | { |
| 3151 | hdr->sh_flags = 0; |
| 3152 | hdr->sh_type = SHT_PROGBITS; |
| 3153 | } |
| 3154 | else if (strcmp (name, ".rtproc") == 0) |
| 3155 | { |
| 3156 | if (hdr->sh_addralign != 0 && hdr->sh_entsize == 0) |
| 3157 | { |
| 3158 | unsigned int adjust; |
| 3159 | |
| 3160 | adjust = hdr->sh_size % hdr->sh_addralign; |
| 3161 | if (adjust != 0) |
| 3162 | hdr->sh_size += hdr->sh_addralign - adjust; |
| 3163 | } |
| 3164 | } |
| 3165 | } |
| 3166 | |
| 3167 | return true; |
| 3168 | } |
| 3169 | |
| 3170 | \f |
| 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; |
| 3179 | |
| 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; |
| 3186 | |
| 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. */ |
| 3189 | |
| 3190 | void |
| 3191 | _bfd_mips_elf_symbol_processing (abfd, asym) |
| 3192 | bfd *abfd; |
| 3193 | asymbol *asym; |
| 3194 | { |
| 3195 | elf_symbol_type *elfsym; |
| 3196 | |
| 3197 | elfsym = (elf_symbol_type *) asym; |
| 3198 | switch (elfsym->internal_elf_sym.st_shndx) |
| 3199 | { |
| 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) |
| 3207 | { |
| 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; |
| 3218 | } |
| 3219 | asym->section = &mips_elf_acom_section; |
| 3220 | break; |
| 3221 | |
| 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) |
| 3231 | { |
| 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; |
| 3242 | } |
| 3243 | asym->section = &mips_elf_scom_section; |
| 3244 | asym->value = elfsym->internal_elf_sym.st_size; |
| 3245 | break; |
| 3246 | |
| 3247 | case SHN_MIPS_SUNDEFINED: |
| 3248 | asym->section = bfd_und_section_ptr; |
| 3249 | break; |
| 3250 | |
| 3251 | #if 0 /* for SGI_COMPAT */ |
| 3252 | case SHN_MIPS_TEXT: |
| 3253 | asym->section = mips_elf_text_section_ptr; |
| 3254 | break; |
| 3255 | |
| 3256 | case SHN_MIPS_DATA: |
| 3257 | asym->section = mips_elf_data_section_ptr; |
| 3258 | break; |
| 3259 | #endif |
| 3260 | } |
| 3261 | } |
| 3262 | \f |
| 3263 | /* When creating an Irix 5 executable, we need REGINFO and RTPROC |
| 3264 | segments. */ |
| 3265 | |
| 3266 | int |
| 3267 | _bfd_mips_elf_additional_program_headers (abfd) |
| 3268 | bfd *abfd; |
| 3269 | { |
| 3270 | asection *s; |
| 3271 | int ret = 0; |
| 3272 | |
| 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; |
| 3277 | |
| 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; |
| 3283 | |
| 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; |
| 3289 | |
| 3290 | return ret; |
| 3291 | } |
| 3292 | |
| 3293 | /* Modify the segment map for an Irix 5 executable. */ |
| 3294 | |
| 3295 | boolean |
| 3296 | _bfd_mips_elf_modify_segment_map (abfd) |
| 3297 | bfd *abfd; |
| 3298 | { |
| 3299 | asection *s; |
| 3300 | struct elf_segment_map *m, **pm; |
| 3301 | |
| 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) |
| 3306 | { |
| 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) |
| 3311 | { |
| 3312 | m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m); |
| 3313 | if (m == NULL) |
| 3314 | return false; |
| 3315 | |
| 3316 | m->p_type = PT_MIPS_REGINFO; |
| 3317 | m->count = 1; |
| 3318 | m->sections[0] = s; |
| 3319 | |
| 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; |
| 3326 | |
| 3327 | m->next = *pm; |
| 3328 | *pm = m; |
| 3329 | } |
| 3330 | } |
| 3331 | |
| 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) |
| 3337 | { |
| 3338 | asection *s; |
| 3339 | |
| 3340 | for (s = abfd->sections; s; s = s->next) |
| 3341 | if (elf_section_data (s)->this_hdr.sh_type == SHT_MIPS_OPTIONS) |
| 3342 | break; |
| 3343 | |
| 3344 | if (s) |
| 3345 | { |
| 3346 | struct elf_segment_map *options_segment; |
| 3347 | |
| 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; |
| 3357 | |
| 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; |
| 3367 | } |
| 3368 | } |
| 3369 | else |
| 3370 | { |
| 3371 | if (IRIX_COMPAT (abfd) == ict_irix5) |
| 3372 | { |
| 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) |
| 3378 | { |
| 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) |
| 3383 | { |
| 3384 | m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m); |
| 3385 | if (m == NULL) |
| 3386 | return false; |
| 3387 | |
| 3388 | m->p_type = PT_MIPS_RTPROC; |
| 3389 | |
| 3390 | s = bfd_get_section_by_name (abfd, ".rtproc"); |
| 3391 | if (s == NULL) |
| 3392 | { |
| 3393 | m->count = 0; |
| 3394 | m->p_flags = 0; |
| 3395 | m->p_flags_valid = 1; |
| 3396 | } |
| 3397 | else |
| 3398 | { |
| 3399 | m->count = 1; |
| 3400 | m->sections[0] = s; |
| 3401 | } |
| 3402 | |
| 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; |
| 3409 | |
| 3410 | m->next = *pm; |
| 3411 | *pm = m; |
| 3412 | } |
| 3413 | } |
| 3414 | } |
| 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) |
| 3424 | { |
| 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) |
| 3430 | { |
| 3431 | m->p_flags = PF_R | PF_W | PF_X; |
| 3432 | m->p_flags_valid = 1; |
| 3433 | } |
| 3434 | } |
| 3435 | if (m != NULL |
| 3436 | && m->count == 1 && strcmp (m->sections[0]->name, ".dynamic") == 0) |
| 3437 | { |
| 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; |
| 3443 | |
| 3444 | low = 0xffffffff; |
| 3445 | high = 0; |
| 3446 | for (i = 0; i < sizeof sec_names / sizeof sec_names[0]; i++) |
| 3447 | { |
| 3448 | s = bfd_get_section_by_name (abfd, sec_names[i]); |
| 3449 | if (s != NULL && (s->flags & SEC_LOAD) != 0) |
| 3450 | { |
| 3451 | bfd_size_type sz; |
| 3452 | |
| 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; |
| 3460 | } |
| 3461 | } |
| 3462 | |
| 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; |
| 3471 | |
| 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; |
| 3478 | |
| 3479 | i = 0; |
| 3480 | for (s = abfd->sections; s != NULL; s = s->next) |
| 3481 | { |
| 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)) |
| 3487 | { |
| 3488 | n->sections[i] = s; |
| 3489 | ++i; |
| 3490 | } |
| 3491 | } |
| 3492 | |
| 3493 | *pm = n; |
| 3494 | } |
| 3495 | } |
| 3496 | |
| 3497 | return true; |
| 3498 | } |
| 3499 | \f |
| 3500 | /* The structure of the runtime procedure descriptor created by the |
| 3501 | loader for use by the static exception system. */ |
| 3502 | |
| 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) |
| 3518 | |
| 3519 | /* Swap RPDR (runtime procedure table entry) for output. */ |
| 3520 | |
| 3521 | static void ecoff_swap_rpdr_out |
| 3522 | PARAMS ((bfd *, const RPDR *, struct rpdr_ext *)); |
| 3523 | |
| 3524 | static void |
| 3525 | ecoff_swap_rpdr_out (abfd, in, ex) |
| 3526 | bfd *abfd; |
| 3527 | const RPDR *in; |
| 3528 | struct rpdr_ext *ex; |
| 3529 | { |
| 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); |
| 3537 | |
| 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); |
| 3540 | |
| 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 |
| 3545 | } |
| 3546 | \f |
| 3547 | /* Read ECOFF debugging information from a .mdebug section into a |
| 3548 | ecoff_debug_info structure. */ |
| 3549 | |
| 3550 | boolean |
| 3551 | _bfd_mips_elf_read_ecoff_info (abfd, section, debug) |
| 3552 | bfd *abfd; |
| 3553 | asection *section; |
| 3554 | struct ecoff_debug_info *debug; |
| 3555 | { |
| 3556 | HDRR *symhdr; |
| 3557 | const struct ecoff_debug_swap *swap; |
| 3558 | char *ext_hdr = NULL; |
| 3559 | |
| 3560 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 3561 | memset (debug, 0, sizeof(*debug)); |
| 3562 | |
| 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; |
| 3566 | |
| 3567 | if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, |
| 3568 | swap->external_hdr_size) |
| 3569 | == false) |
| 3570 | goto error_return; |
| 3571 | |
| 3572 | symhdr = &debug->symbolic_header; |
| 3573 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); |
| 3574 | |
| 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 \ |
| 3581 | { \ |
| 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; \ |
| 3589 | } |
| 3590 | |
| 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 |
| 3604 | |
| 3605 | debug->fdr = NULL; |
| 3606 | debug->adjust = NULL; |
| 3607 | |
| 3608 | return true; |
| 3609 | |
| 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; |
| 3636 | } |
| 3637 | \f |
| 3638 | /* MIPS ELF local labels start with '$', not 'L'. */ |
| 3639 | |
| 3640 | /*ARGSUSED*/ |
| 3641 | static boolean |
| 3642 | mips_elf_is_local_label_name (abfd, name) |
| 3643 | bfd *abfd; |
| 3644 | const char *name; |
| 3645 | { |
| 3646 | if (name[0] == '$') |
| 3647 | return true; |
| 3648 | |
| 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); |
| 3652 | } |
| 3653 | |
| 3654 | /* MIPS ELF uses a special find_nearest_line routine in order the |
| 3655 | handle the ECOFF debugging information. */ |
| 3656 | |
| 3657 | struct mips_elf_find_line |
| 3658 | { |
| 3659 | struct ecoff_debug_info d; |
| 3660 | struct ecoff_find_line i; |
| 3661 | }; |
| 3662 | |
| 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; |
| 3673 | { |
| 3674 | asection *msec; |
| 3675 | |
| 3676 | if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset, |
| 3677 | filename_ptr, functionname_ptr, |
| 3678 | line_ptr)) |
| 3679 | return true; |
| 3680 | |
| 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; |
| 3686 | |
| 3687 | msec = bfd_get_section_by_name (abfd, ".mdebug"); |
| 3688 | if (msec != NULL) |
| 3689 | { |
| 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; |
| 3694 | |
| 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; |
| 3701 | |
| 3702 | fi = elf_tdata (abfd)->find_line_info; |
| 3703 | if (fi == NULL) |
| 3704 | { |
| 3705 | bfd_size_type external_fdr_size; |
| 3706 | char *fraw_src; |
| 3707 | char *fraw_end; |
| 3708 | struct fdr *fdr_ptr; |
| 3709 | |
| 3710 | fi = ((struct mips_elf_find_line *) |
| 3711 | bfd_zalloc (abfd, sizeof (struct mips_elf_find_line))); |
| 3712 | if (fi == NULL) |
| 3713 | { |
| 3714 | msec->flags = origflags; |
| 3715 | return false; |
| 3716 | } |
| 3717 | |
| 3718 | if (! _bfd_mips_elf_read_ecoff_info (abfd, msec, &fi->d)) |
| 3719 | { |
| 3720 | msec->flags = origflags; |
| 3721 | return false; |
| 3722 | } |
| 3723 | |
| 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) |
| 3730 | { |
| 3731 | msec->flags = origflags; |
| 3732 | return false; |
| 3733 | } |
| 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); |
| 3741 | |
| 3742 | elf_tdata (abfd)->find_line_info = fi; |
| 3743 | |
| 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. */ |
| 3750 | } |
| 3751 | |
| 3752 | if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, |
| 3753 | &fi->i, filename_ptr, functionname_ptr, |
| 3754 | line_ptr)) |
| 3755 | { |
| 3756 | msec->flags = origflags; |
| 3757 | return true; |
| 3758 | } |
| 3759 | |
| 3760 | msec->flags = origflags; |
| 3761 | } |
| 3762 | |
| 3763 | /* Fall back on the generic ELF find_nearest_line routine. */ |
| 3764 | |
| 3765 | return _bfd_elf_find_nearest_line (abfd, section, symbols, offset, |
| 3766 | filename_ptr, functionname_ptr, |
| 3767 | line_ptr); |
| 3768 | } |
| 3769 | \f |
| 3770 | /* The mips16 compiler uses a couple of special sections to handle |
| 3771 | floating point arguments. |
| 3772 | |
| 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. |
| 3781 | |
| 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. |
| 3788 | |
| 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.) |
| 3797 | |
| 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. |
| 3801 | |
| 3802 | We record any stubs that we find in the symbol table. */ |
| 3803 | |
| 3804 | #define FN_STUB ".mips16.fn." |
| 3805 | #define CALL_STUB ".mips16.call." |
| 3806 | #define CALL_FP_STUB ".mips16.call.fp." |
| 3807 | |
| 3808 | /* MIPS ELF linker hash table. */ |
| 3809 | |
| 3810 | struct mips_elf_link_hash_table |
| 3811 | { |
| 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; |
| 3829 | }; |
| 3830 | |
| 3831 | /* Look up an entry in a MIPS ELF linker hash table. */ |
| 3832 | |
| 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))) |
| 3837 | |
| 3838 | /* Traverse a MIPS ELF linker hash table. */ |
| 3839 | |
| 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))) |
| 3845 | |
| 3846 | /* Get the MIPS ELF linker hash table from a link_info structure. */ |
| 3847 | |
| 3848 | #define mips_elf_hash_table(p) \ |
| 3849 | ((struct mips_elf_link_hash_table *) ((p)->hash)) |
| 3850 | |
| 3851 | static boolean mips_elf_output_extsym |
| 3852 | PARAMS ((struct mips_elf_link_hash_entry *, PTR)); |
| 3853 | |
| 3854 | /* Create an entry in a MIPS ELF linker hash table. */ |
| 3855 | |
| 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; |
| 3861 | { |
| 3862 | struct mips_elf_link_hash_entry *ret = |
| 3863 | (struct mips_elf_link_hash_entry *) entry; |
| 3864 | |
| 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; |
| 3873 | |
| 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) |
| 3879 | { |
| 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; |
| 3891 | } |
| 3892 | |
| 3893 | return (struct bfd_hash_entry *) ret; |
| 3894 | } |
| 3895 | |
| 3896 | void |
| 3897 | _bfd_mips_elf_hide_symbol(info, h) |
| 3898 | struct bfd_link_info *info; |
| 3899 | struct mips_elf_link_hash_entry *h; |
| 3900 | { |
| 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; |
| 3907 | |
| 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; |
| 3911 | |
| 3912 | /* FIXME: Do we allocate too much GOT space here? */ |
| 3913 | g->local_gotno++; |
| 3914 | got->_raw_size += MIPS_ELF_GOT_SIZE (dynobj); |
| 3915 | } |
| 3916 | |
| 3917 | /* Create a MIPS ELF linker hash table. */ |
| 3918 | |
| 3919 | struct bfd_link_hash_table * |
| 3920 | _bfd_mips_elf_link_hash_table_create (abfd) |
| 3921 | bfd *abfd; |
| 3922 | { |
| 3923 | struct mips_elf_link_hash_table *ret; |
| 3924 | |
| 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; |
| 3929 | |
| 3930 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 3931 | mips_elf_link_hash_newfunc)) |
| 3932 | { |
| 3933 | bfd_release (abfd, ret); |
| 3934 | return NULL; |
| 3935 | } |
| 3936 | |
| 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; |
| 3947 | |
| 3948 | return &ret->root.root; |
| 3949 | } |
| 3950 | |
| 3951 | /* Hook called by the linker routine which adds symbols from an object |
| 3952 | file. We must handle the special MIPS section numbers here. */ |
| 3953 | |
| 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; |
| 3964 | { |
| 3965 | if (SGI_COMPAT (abfd) |
| 3966 | && (abfd->flags & DYNAMIC) != 0 |
| 3967 | && strcmp (*namep, "_rld_new_interface") == 0) |
| 3968 | { |
| 3969 | /* Skip Irix 5 rld entry name. */ |
| 3970 | *namep = NULL; |
| 3971 | return true; |
| 3972 | } |
| 3973 | |
| 3974 | switch (sym->st_shndx) |
| 3975 | { |
| 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; |
| 3988 | |
| 3989 | case SHN_MIPS_TEXT: |
| 3990 | /* This section is used in a shared object. */ |
| 3991 | if (elf_tdata (abfd)->elf_text_section == NULL) |
| 3992 | { |
| 3993 | asymbol *elf_text_symbol; |
| 3994 | asection *elf_text_section; |
| 3995 | |
| 3996 | elf_text_section = bfd_zalloc (abfd, sizeof (asection)); |
| 3997 | if (elf_text_section == NULL) |
| 3998 | return false; |
| 3999 | |
| 4000 | elf_text_symbol = bfd_zalloc (abfd, sizeof (asymbol)); |
| 4001 | if (elf_text_symbol == NULL) |
| 4002 | return false; |
| 4003 | |
| 4004 | /* Initialize the section. */ |
| 4005 | |
| 4006 | elf_tdata (abfd)->elf_text_section = elf_text_section; |
| 4007 | elf_tdata (abfd)->elf_text_symbol = elf_text_symbol; |
| 4008 | |
| 4009 | elf_text_section->symbol = elf_text_symbol; |
| 4010 | elf_text_section->symbol_ptr_ptr = &elf_tdata (abfd)->elf_text_symbol; |
| 4011 | |
| 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; |
| 4019 | } |
| 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; |
| 4025 | |
| 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) |
| 4031 | { |
| 4032 | asymbol *elf_data_symbol; |
| 4033 | asection *elf_data_section; |
| 4034 | |
| 4035 | elf_data_section = bfd_zalloc (abfd, sizeof (asection)); |
| 4036 | if (elf_data_section == NULL) |
| 4037 | return false; |
| 4038 | |
| 4039 | elf_data_symbol = bfd_zalloc (abfd, sizeof (asymbol)); |
| 4040 | if (elf_data_symbol == NULL) |
| 4041 | return false; |
| 4042 | |
| 4043 | /* Initialize the section. */ |
| 4044 | |
| 4045 | elf_tdata (abfd)->elf_data_section = elf_data_section; |
| 4046 | elf_tdata (abfd)->elf_data_symbol = elf_data_symbol; |
| 4047 | |
| 4048 | elf_data_section->symbol = elf_data_symbol; |
| 4049 | elf_data_section->symbol_ptr_ptr = &elf_tdata (abfd)->elf_data_symbol; |
| 4050 | |
| 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; |
| 4058 | } |
| 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; |
| 4064 | |
| 4065 | case SHN_MIPS_SUNDEFINED: |
| 4066 | *secp = bfd_und_section_ptr; |
| 4067 | break; |
| 4068 | } |
| 4069 | |
| 4070 | if (SGI_COMPAT (abfd) |
| 4071 | && ! info->shared |
| 4072 | && info->hash->creator == abfd->xvec |
| 4073 | && strcmp (*namep, "__rld_obj_head") == 0) |
| 4074 | { |
| 4075 | struct elf_link_hash_entry *h; |
| 4076 | |
| 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; |
| 4088 | |
| 4089 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 4090 | return false; |
| 4091 | |
| 4092 | mips_elf_hash_table (info)->use_rld_obj_head = true; |
| 4093 | } |
| 4094 | |
| 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; |
| 4100 | |
| 4101 | return true; |
| 4102 | } |
| 4103 | |
| 4104 | /* Structure used to pass information to mips_elf_output_extsym. */ |
| 4105 | |
| 4106 | struct extsym_info |
| 4107 | { |
| 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; |
| 4113 | }; |
| 4114 | |
| 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. */ |
| 4128 | |
| 4129 | static boolean |
| 4130 | mips_elf_output_extsym (h, data) |
| 4131 | struct mips_elf_link_hash_entry *h; |
| 4132 | PTR data; |
| 4133 | { |
| 4134 | struct extsym_info *einfo = (struct extsym_info *) data; |
| 4135 | boolean strip; |
| 4136 | asection *sec, *output_section; |
| 4137 | |
| 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; |
| 4153 | |
| 4154 | if (strip) |
| 4155 | return true; |
| 4156 | |
| 4157 | if (h->esym.ifd == -2) |
| 4158 | { |
| 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; |
| 4166 | |
| 4167 | if (h->root.root.type == bfd_link_hash_undefined |
| 4168 | || h->root.root.type == bfd_link_hash_undefweak) |
| 4169 | { |
| 4170 | const char *name; |
| 4171 | |
| 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) |
| 4177 | { |
| 4178 | h->esym.asym.sc = scData; |
| 4179 | h->esym.asym.st = stLabel; |
| 4180 | h->esym.asym.value = 0; |
| 4181 | } |
| 4182 | else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0) |
| 4183 | { |
| 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; |
| 4188 | } |
| 4189 | else if (strcmp (name, "_gp_disp") == 0) |
| 4190 | { |
| 4191 | h->esym.asym.sc = scAbs; |
| 4192 | h->esym.asym.st = stLabel; |
| 4193 | h->esym.asym.value = elf_gp (einfo->abfd); |
| 4194 | } |
| 4195 | else |
| 4196 | h->esym.asym.sc = scUndefined; |
| 4197 | } |
| 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 |
| 4202 | { |
| 4203 | const char *name; |
| 4204 | |
| 4205 | sec = h->root.root.u.def.section; |
| 4206 | output_section = sec->output_section; |
| 4207 | |
| 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 |
| 4213 | { |
| 4214 | name = bfd_section_name (output_section->owner, output_section); |
| 4215 | |
| 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; |
| 4235 | } |
| 4236 | } |
| 4237 | |
| 4238 | h->esym.asym.reserved = 0; |
| 4239 | h->esym.asym.index = indexNil; |
| 4240 | } |
| 4241 | |
| 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) |
| 4246 | { |
| 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; |
| 4251 | |
| 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; |
| 4260 | } |
| 4261 | else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 4262 | { |
| 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 |
| 4269 | { |
| 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; |
| 4277 | } |
| 4278 | #if 0 /* FIXME? */ |
| 4279 | h->esym.ifd = 0; |
| 4280 | #endif |
| 4281 | } |
| 4282 | |
| 4283 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, |
| 4284 | h->root.root.root.string, |
| 4285 | &h->esym)) |
| 4286 | { |
| 4287 | einfo->failed = true; |
| 4288 | return false; |
| 4289 | } |
| 4290 | |
| 4291 | return true; |
| 4292 | } |
| 4293 | |
| 4294 | /* Create a runtime procedure table from the .mdebug section. */ |
| 4295 | |
| 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; |
| 4303 | { |
| 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)"); |
| 4319 | |
| 4320 | epdr = NULL; |
| 4321 | rpdr = NULL; |
| 4322 | esym = NULL; |
| 4323 | ss = NULL; |
| 4324 | sv = NULL; |
| 4325 | |
| 4326 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 4327 | |
| 4328 | sindex = strlen (no_name_func) + 1; |
| 4329 | count = hdr->ipdMax; |
| 4330 | if (count > 0) |
| 4331 | { |
| 4332 | size = swap->external_pdr_size; |
| 4333 | |
| 4334 | epdr = (struct pdr_ext *) bfd_malloc (size * count); |
| 4335 | if (epdr == NULL) |
| 4336 | goto error_return; |
| 4337 | |
| 4338 | if (! _bfd_ecoff_get_accumulated_pdr (handle, (PTR) epdr)) |
| 4339 | goto error_return; |
| 4340 | |
| 4341 | size = sizeof (RPDR); |
| 4342 | rp = rpdr = (RPDR *) bfd_malloc (size * count); |
| 4343 | if (rpdr == NULL) |
| 4344 | goto error_return; |
| 4345 | |
| 4346 | sv = (char **) bfd_malloc (sizeof (char *) * count); |
| 4347 | if (sv == NULL) |
| 4348 | goto error_return; |
| 4349 | |
| 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; |
| 4355 | |
| 4356 | if (! _bfd_ecoff_get_accumulated_sym (handle, (PTR) esym)) |
| 4357 | goto error_return; |
| 4358 | |
| 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; |
| 4365 | |
| 4366 | count = hdr->ipdMax; |
| 4367 | for (i = 0; i < count; i++, rp++) |
| 4368 | { |
| 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; |
| 4382 | } |
| 4383 | } |
| 4384 | |
| 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) |
| 4389 | { |
| 4390 | mips_elf_hash_table (info)->procedure_count = 0; |
| 4391 | goto error_return; |
| 4392 | } |
| 4393 | |
| 4394 | mips_elf_hash_table (info)->procedure_count = count + 2; |
| 4395 | |
| 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++) |
| 4403 | { |
| 4404 | ecoff_swap_rpdr_out (abfd, rpdr + i, erp + i); |
| 4405 | strcpy (str, sv[i]); |
| 4406 | str += strlen (sv[i]) + 1; |
| 4407 | } |
| 4408 | ecoff_put_off (abfd, (bfd_vma) -1, (bfd_byte *) (erp + count)->p_adr); |
| 4409 | |
| 4410 | /* Set the size and contents of .rtproc section. */ |
| 4411 | s->_raw_size = size; |
| 4412 | s->contents = (bfd_byte *) rtproc; |
| 4413 | |
| 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; |
| 4417 | |
| 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); |
| 4428 | |
| 4429 | return true; |
| 4430 | |
| 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; |
| 4443 | } |
| 4444 | |
| 4445 | /* A comparison routine used to sort .gptab entries. */ |
| 4446 | |
| 4447 | static int |
| 4448 | gptab_compare (p1, p2) |
| 4449 | const PTR p1; |
| 4450 | const PTR p2; |
| 4451 | { |
| 4452 | const Elf32_gptab *a1 = (const Elf32_gptab *) p1; |
| 4453 | const Elf32_gptab *a2 = (const Elf32_gptab *) p2; |
| 4454 | |
| 4455 | return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value; |
| 4456 | } |
| 4457 | |
| 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. */ |
| 4461 | |
| 4462 | boolean |
| 4463 | _bfd_mips_elf_final_link (abfd, info) |
| 4464 | bfd *abfd; |
| 4465 | struct bfd_link_info *info; |
| 4466 | { |
| 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 }; |
| 4487 | |
| 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) |
| 4494 | { |
| 4495 | elf_elfheader (abfd)->e_flags &= ~EF_MIPS_PIC; |
| 4496 | elf_elfheader (abfd)->e_flags |= EF_MIPS_CPIC; |
| 4497 | } |
| 4498 | |
| 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) |
| 4504 | { |
| 4505 | bfd *dynobj; |
| 4506 | asection *got; |
| 4507 | struct mips_got_info *g; |
| 4508 | |
| 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; |
| 4519 | |
| 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; |
| 4524 | |
| 4525 | if (g->global_gotsym != NULL) |
| 4526 | BFD_ASSERT ((elf_hash_table (info)->dynsymcount |
| 4527 | - g->global_gotsym->dynindx) |
| 4528 | <= g->global_gotno); |
| 4529 | } |
| 4530 | |
| 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) |
| 4537 | { |
| 4538 | if (strcmp ((*secpp)->name, MIPS_ELF_OPTIONS_SECTION_NAME (abfd)) == 0) |
| 4539 | { |
| 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; |
| 4546 | |
| 4547 | break; |
| 4548 | } |
| 4549 | } |
| 4550 | |
| 4551 | /* Get a value for the GP register. */ |
| 4552 | if (elf_gp (abfd) == 0) |
| 4553 | { |
| 4554 | struct bfd_link_hash_entry *h; |
| 4555 | |
| 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) |
| 4563 | { |
| 4564 | bfd_vma lo; |
| 4565 | |
| 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; |
| 4572 | |
| 4573 | /* And calculate GP relative to that. */ |
| 4574 | elf_gp (abfd) = lo + ELF_MIPS_GP_OFFSET (abfd); |
| 4575 | } |
| 4576 | else |
| 4577 | { |
| 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. */ |
| 4581 | } |
| 4582 | } |
| 4583 | |
| 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) |
| 4591 | { |
| 4592 | if (strcmp (o->name, ".reginfo") == 0) |
| 4593 | { |
| 4594 | memset (®info, 0, sizeof reginfo); |
| 4595 | |
| 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) |
| 4602 | { |
| 4603 | asection *input_section; |
| 4604 | bfd *input_bfd; |
| 4605 | Elf32_External_RegInfo ext; |
| 4606 | Elf32_RegInfo sub; |
| 4607 | |
| 4608 | if (p->type != bfd_indirect_link_order) |
| 4609 | { |
| 4610 | if (p->type == bfd_fill_link_order) |
| 4611 | continue; |
| 4612 | abort (); |
| 4613 | } |
| 4614 | |
| 4615 | input_section = p->u.indirect.section; |
| 4616 | input_bfd = input_section->owner; |
| 4617 | |
| 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); |
| 4622 | |
| 4623 | if (! bfd_get_section_contents (input_bfd, input_section, |
| 4624 | (PTR) &ext, |
| 4625 | (file_ptr) 0, |
| 4626 | sizeof ext)) |
| 4627 | return false; |
| 4628 | |
| 4629 | bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub); |
| 4630 | |
| 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]; |
| 4636 | |
| 4637 | /* ri_gp_value is set by the function |
| 4638 | mips_elf32_section_processing when the section is |
| 4639 | finally written out. */ |
| 4640 | |
| 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; |
| 4644 | } |
| 4645 | |
| 4646 | /* Size has been set in mips_elf_always_size_sections */ |
| 4647 | BFD_ASSERT(o->_raw_size == sizeof (Elf32_External_RegInfo)); |
| 4648 | |
| 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; |
| 4652 | |
| 4653 | reginfo_sec = o; |
| 4654 | } |
| 4655 | |
| 4656 | if (strcmp (o->name, ".mdebug") == 0) |
| 4657 | { |
| 4658 | struct extsym_info einfo; |
| 4659 | |
| 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; |
| 4678 | |
| 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; |
| 4692 | |
| 4693 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); |
| 4694 | if (mdebug_handle == (PTR) NULL) |
| 4695 | return false; |
| 4696 | |
| 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++) |
| 4708 | { |
| 4709 | esym.asym.sc = sc[i]; |
| 4710 | s = bfd_get_section_by_name (abfd, name[i]); |
| 4711 | if (s != NULL) |
| 4712 | { |
| 4713 | esym.asym.value = s->vma; |
| 4714 | last = s->vma + s->_raw_size; |
| 4715 | } |
| 4716 | else |
| 4717 | esym.asym.value = last; |
| 4718 | if (!bfd_ecoff_debug_one_external (abfd, &debug, swap, |
| 4719 | name[i], &esym)) |
| 4720 | return false; |
| 4721 | } |
| 4722 | |
| 4723 | for (p = o->link_order_head; |
| 4724 | p != (struct bfd_link_order *) NULL; |
| 4725 | p = p->next) |
| 4726 | { |
| 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; |
| 4733 | |
| 4734 | if (p->type != bfd_indirect_link_order) |
| 4735 | { |
| 4736 | if (p->type == bfd_fill_link_order) |
| 4737 | continue; |
| 4738 | abort (); |
| 4739 | } |
| 4740 | |
| 4741 | input_section = p->u.indirect.section; |
| 4742 | input_bfd = input_section->owner; |
| 4743 | |
| 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) |
| 4747 | { |
| 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; |
| 4752 | } |
| 4753 | |
| 4754 | input_swap = (get_elf_backend_data (input_bfd) |
| 4755 | ->elf_backend_ecoff_debug_swap); |
| 4756 | |
| 4757 | BFD_ASSERT (p->size == input_section->_raw_size); |
| 4758 | |
| 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; |
| 4765 | |
| 4766 | if (! (bfd_ecoff_debug_accumulate |
| 4767 | (mdebug_handle, abfd, &debug, swap, input_bfd, |
| 4768 | &input_debug, input_swap, info))) |
| 4769 | return false; |
| 4770 | |
| 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) |
| 4782 | { |
| 4783 | EXTR ext; |
| 4784 | const char *name; |
| 4785 | struct mips_elf_link_hash_entry *h; |
| 4786 | |
| 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; |
| 4792 | |
| 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; |
| 4798 | |
| 4799 | if (ext.ifd != -1) |
| 4800 | { |
| 4801 | BFD_ASSERT (ext.ifd |
| 4802 | < input_debug.symbolic_header.ifdMax); |
| 4803 | ext.ifd = input_debug.ifdmap[ext.ifd]; |
| 4804 | } |
| 4805 | |
| 4806 | h->esym = ext; |
| 4807 | } |
| 4808 | |
| 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); |
| 4821 | |
| 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; |
| 4825 | } |
| 4826 | |
| 4827 | if (SGI_COMPAT (abfd) && info->shared) |
| 4828 | { |
| 4829 | /* Create .rtproc section. */ |
| 4830 | rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc"); |
| 4831 | if (rtproc_sec == NULL) |
| 4832 | { |
| 4833 | flagword flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 4834 | | SEC_LINKER_CREATED | SEC_READONLY); |
| 4835 | |
| 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; |
| 4841 | } |
| 4842 | |
| 4843 | if (! mips_elf_create_procedure_table (mdebug_handle, abfd, |
| 4844 | info, rtproc_sec, &debug)) |
| 4845 | return false; |
| 4846 | } |
| 4847 | |
| 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; |
| 4859 | |
| 4860 | /* Set the size of the .mdebug section. */ |
| 4861 | o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap); |
| 4862 | |
| 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; |
| 4866 | |
| 4867 | mdebug_sec = o; |
| 4868 | } |
| 4869 | |
| 4870 | if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0) |
| 4871 | { |
| 4872 | const char *subname; |
| 4873 | unsigned int c; |
| 4874 | Elf32_gptab *tab; |
| 4875 | Elf32_External_gptab *ext_tab; |
| 4876 | unsigned int i; |
| 4877 | |
| 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) |
| 4883 | { |
| 4884 | asection **secpp; |
| 4885 | |
| 4886 | for (p = o->link_order_head; |
| 4887 | p != (struct bfd_link_order *) NULL; |
| 4888 | p = p->next) |
| 4889 | { |
| 4890 | asection *input_section; |
| 4891 | |
| 4892 | if (p->type != bfd_indirect_link_order) |
| 4893 | { |
| 4894 | if (p->type == bfd_fill_link_order) |
| 4895 | continue; |
| 4896 | abort (); |
| 4897 | } |
| 4898 | |
| 4899 | input_section = p->u.indirect.section; |
| 4900 | |
| 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; |
| 4904 | } |
| 4905 | |
| 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; |
| 4909 | |
| 4910 | /* Really remove the section. */ |
| 4911 | for (secpp = &abfd->sections; |
| 4912 | *secpp != o; |
| 4913 | secpp = &(*secpp)->next) |
| 4914 | ; |
| 4915 | *secpp = (*secpp)->next; |
| 4916 | --abfd->section_count; |
| 4917 | |
| 4918 | continue; |
| 4919 | } |
| 4920 | |
| 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 |
| 4928 | { |
| 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; |
| 4934 | } |
| 4935 | |
| 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) |
| 4943 | { |
| 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); |
| 4950 | } |
| 4951 | |
| 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; |
| 4959 | |
| 4960 | /* Combine the input sections. */ |
| 4961 | for (p = o->link_order_head; |
| 4962 | p != (struct bfd_link_order *) NULL; |
| 4963 | p = p->next) |
| 4964 | { |
| 4965 | asection *input_section; |
| 4966 | bfd *input_bfd; |
| 4967 | bfd_size_type size; |
| 4968 | unsigned long last; |
| 4969 | bfd_size_type gpentry; |
| 4970 | |
| 4971 | if (p->type != bfd_indirect_link_order) |
| 4972 | { |
| 4973 | if (p->type == bfd_fill_link_order) |
| 4974 | continue; |
| 4975 | abort (); |
| 4976 | } |
| 4977 | |
| 4978 | input_section = p->u.indirect.section; |
| 4979 | input_bfd = input_section->owner; |
| 4980 | |
| 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)) |
| 4989 | { |
| 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; |
| 4996 | |
| 4997 | if (! (bfd_get_section_contents |
| 4998 | (input_bfd, input_section, (PTR) &ext_gptab, |
| 4999 | gpentry, sizeof (Elf32_External_gptab)))) |
| 5000 | { |
| 5001 | free (tab); |
| 5002 | return false; |
| 5003 | } |
| 5004 | |
| 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; |
| 5009 | |
| 5010 | exact = false; |
| 5011 | for (look = 1; look < c; look++) |
| 5012 | { |
| 5013 | if (tab[look].gt_entry.gt_g_value >= val) |
| 5014 | tab[look].gt_entry.gt_bytes += add; |
| 5015 | |
| 5016 | if (tab[look].gt_entry.gt_g_value == val) |
| 5017 | exact = true; |
| 5018 | } |
| 5019 | |
| 5020 | if (! exact) |
| 5021 | { |
| 5022 | Elf32_gptab *new_tab; |
| 5023 | unsigned int max; |
| 5024 | |
| 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) |
| 5030 | { |
| 5031 | free (tab); |
| 5032 | return false; |
| 5033 | } |
| 5034 | tab = new_tab; |
| 5035 | tab[c].gt_entry.gt_g_value = val; |
| 5036 | tab[c].gt_entry.gt_bytes = add; |
| 5037 | |
| 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++) |
| 5043 | { |
| 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; |
| 5049 | } |
| 5050 | if (max != 0) |
| 5051 | tab[c].gt_entry.gt_bytes += |
| 5052 | tab[max].gt_entry.gt_bytes; |
| 5053 | |
| 5054 | ++c; |
| 5055 | } |
| 5056 | |
| 5057 | last = int_gptab.gt_entry.gt_bytes; |
| 5058 | } |
| 5059 | |
| 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; |
| 5063 | } |
| 5064 | |
| 5065 | /* The table must be sorted by -G value. */ |
| 5066 | if (c > 2) |
| 5067 | qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare); |
| 5068 | |
| 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) |
| 5073 | { |
| 5074 | free (tab); |
| 5075 | return false; |
| 5076 | } |
| 5077 | |
| 5078 | for (i = 0; i < c; i++) |
| 5079 | bfd_mips_elf32_swap_gptab_out (abfd, tab + i, ext_tab + i); |
| 5080 | free (tab); |
| 5081 | |
| 5082 | o->_raw_size = c * sizeof (Elf32_External_gptab); |
| 5083 | o->contents = (bfd_byte *) ext_tab; |
| 5084 | |
| 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; |
| 5088 | } |
| 5089 | } |
| 5090 | |
| 5091 | /* Invoke the regular ELF backend linker to do all the work. */ |
| 5092 | if (ABI_64_P (abfd)) |
| 5093 | { |
| 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 */ |
| 5101 | } |
| 5102 | else if (!bfd_elf32_bfd_final_link (abfd, info)) |
| 5103 | return false; |
| 5104 | |
| 5105 | /* Now write out the computed sections. */ |
| 5106 | |
| 5107 | if (reginfo_sec != (asection *) NULL) |
| 5108 | { |
| 5109 | Elf32_External_RegInfo ext; |
| 5110 | |
| 5111 | bfd_mips_elf32_swap_reginfo_out (abfd, ®info, &ext); |
| 5112 | if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext, |
| 5113 | (file_ptr) 0, sizeof ext)) |
| 5114 | return false; |
| 5115 | } |
| 5116 | |
| 5117 | if (mdebug_sec != (asection *) NULL) |
| 5118 | { |
| 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; |
| 5124 | |
| 5125 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); |
| 5126 | } |
| 5127 | |
| 5128 | if (gptab_data_sec != (asection *) NULL) |
| 5129 | { |
| 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; |
| 5135 | } |
| 5136 | |
| 5137 | if (gptab_bss_sec != (asection *) NULL) |
| 5138 | { |
| 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; |
| 5144 | } |
| 5145 | |
| 5146 | if (SGI_COMPAT (abfd)) |
| 5147 | { |
| 5148 | rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc"); |
| 5149 | if (rtproc_sec != NULL) |
| 5150 | { |
| 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; |
| 5156 | } |
| 5157 | } |
| 5158 | |
| 5159 | return true; |
| 5160 | } |
| 5161 | |
| 5162 | /* This function is called via qsort() to sort the dynamic relocation |
| 5163 | entries by increasing r_symndx value. */ |
| 5164 | |
| 5165 | static int |
| 5166 | sort_dynamic_relocs (arg1,arg2) |
| 5167 | const PTR arg1; |
| 5168 | const PTR arg2; |
| 5169 | { |
| 5170 | const Elf32_External_Rel *ext_reloc1 = (const Elf32_External_Rel *) arg1; |
| 5171 | const Elf32_External_Rel *ext_reloc2 = (const Elf32_External_Rel *) arg2; |
| 5172 | |
| 5173 | Elf_Internal_Rel int_reloc1; |
| 5174 | Elf_Internal_Rel int_reloc2; |
| 5175 | |
| 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); |
| 5178 | |
| 5179 | return (ELF32_R_SYM(int_reloc1.r_info) - ELF32_R_SYM(int_reloc2.r_info)); |
| 5180 | } |
| 5181 | |
| 5182 | /* Returns the GOT section for ABFD. */ |
| 5183 | |
| 5184 | static asection * |
| 5185 | mips_elf_got_section (abfd) |
| 5186 | bfd *abfd; |
| 5187 | { |
| 5188 | return bfd_get_section_by_name (abfd, ".got"); |
| 5189 | } |
| 5190 | |
| 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. */ |
| 5194 | |
| 5195 | static struct mips_got_info * |
| 5196 | mips_elf_got_info (abfd, sgotp) |
| 5197 | bfd *abfd; |
| 5198 | asection **sgotp; |
| 5199 | { |
| 5200 | asection *sgot; |
| 5201 | struct mips_got_info *g; |
| 5202 | |
| 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); |
| 5208 | |
| 5209 | if (sgotp) |
| 5210 | *sgotp = sgot; |
| 5211 | return g; |
| 5212 | } |
| 5213 | |
| 5214 | /* Return whether a relocation is against a local symbol. */ |
| 5215 | |
| 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; |
| 5223 | { |
| 5224 | unsigned long r_symndx; |
| 5225 | Elf_Internal_Shdr *symtab_hdr; |
| 5226 | struct mips_elf_link_hash_entry* h; |
| 5227 | size_t extsymoff; |
| 5228 | |
| 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; |
| 5232 | |
| 5233 | if (r_symndx < extsymoff) |
| 5234 | return true; |
| 5235 | if (elf_bad_symtab (input_bfd) && local_sections[r_symndx] != NULL) |
| 5236 | return true; |
| 5237 | |
| 5238 | if (check_forced) |
| 5239 | { |
| 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; |
| 5250 | } |
| 5251 | |
| 5252 | return false; |
| 5253 | } |
| 5254 | |
| 5255 | /* Sign-extend VALUE, which has the indicated number of BITS. */ |
| 5256 | |
| 5257 | static bfd_vma |
| 5258 | mips_elf_sign_extend (value, bits) |
| 5259 | bfd_vma value; |
| 5260 | int bits; |
| 5261 | { |
| 5262 | if (value & ((bfd_vma)1 << (bits - 1))) |
| 5263 | /* VALUE is negative. */ |
| 5264 | value |= ((bfd_vma) - 1) << bits; |
| 5265 | |
| 5266 | return value; |
| 5267 | } |
| 5268 | |
| 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. */ |
| 5272 | |
| 5273 | static boolean |
| 5274 | mips_elf_overflow_p (value, bits) |
| 5275 | bfd_vma value; |
| 5276 | int bits; |
| 5277 | { |
| 5278 | bfd_signed_vma svalue = (bfd_signed_vma) value; |
| 5279 | |
| 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; |
| 5286 | |
| 5287 | /* All is well. */ |
| 5288 | return false; |
| 5289 | } |
| 5290 | |
| 5291 | /* Calculate the %high function. */ |
| 5292 | |
| 5293 | static bfd_vma |
| 5294 | mips_elf_high (value) |
| 5295 | bfd_vma value; |
| 5296 | { |
| 5297 | return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff; |
| 5298 | } |
| 5299 | |
| 5300 | /* Calculate the %higher function. */ |
| 5301 | |
| 5302 | static bfd_vma |
| 5303 | mips_elf_higher (value) |
| 5304 | bfd_vma value ATTRIBUTE_UNUSED; |
| 5305 | { |
| 5306 | #ifdef BFD64 |
| 5307 | return ((value + (bfd_vma) 0x80008000) >> 32) & 0xffff; |
| 5308 | #else |
| 5309 | abort (); |
| 5310 | return (bfd_vma) -1; |
| 5311 | #endif |
| 5312 | } |
| 5313 | |
| 5314 | /* Calculate the %highest function. */ |
| 5315 | |
| 5316 | static bfd_vma |
| 5317 | mips_elf_highest (value) |
| 5318 | bfd_vma value ATTRIBUTE_UNUSED; |
| 5319 | { |
| 5320 | #ifdef BFD64 |
| 5321 | return ((value + (bfd_vma) 0x800080008000) >> 48) & 0xffff; |
| 5322 | #else |
| 5323 | abort (); |
| 5324 | return (bfd_vma) -1; |
| 5325 | #endif |
| 5326 | } |
| 5327 | |
| 5328 | /* Returns the GOT index for the global symbol indicated by H. */ |
| 5329 | |
| 5330 | static bfd_vma |
| 5331 | mips_elf_global_got_index (abfd, h) |
| 5332 | bfd *abfd; |
| 5333 | struct elf_link_hash_entry *h; |
| 5334 | { |
| 5335 | bfd_vma index; |
| 5336 | asection *sgot; |
| 5337 | struct mips_got_info *g; |
| 5338 | |
| 5339 | g = mips_elf_got_info (abfd, &sgot); |
| 5340 | |
| 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); |
| 5349 | |
| 5350 | return index; |
| 5351 | } |
| 5352 | |
| 5353 | /* Returns the offset for the entry at the INDEXth position |
| 5354 | in the GOT. */ |
| 5355 | |
| 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; |
| 5361 | { |
| 5362 | asection *sgot; |
| 5363 | bfd_vma gp; |
| 5364 | |
| 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); |
| 5369 | } |
| 5370 | |
| 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. */ |
| 5374 | |
| 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; |
| 5380 | { |
| 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; |
| 5386 | |
| 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; |
| 5391 | |
| 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; |
| 5395 | |
| 5396 | return true; |
| 5397 | } |
| 5398 | |
| 5399 | /* This structure is passed to mips_elf_sort_hash_table_f when sorting |
| 5400 | the dynamic symbols. */ |
| 5401 | |
| 5402 | struct mips_elf_hash_sort_data |
| 5403 | { |
| 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; |
| 5413 | }; |
| 5414 | |
| 5415 | /* If H needs a GOT entry, assign it the highest available dynamic |
| 5416 | index. Otherwise, assign it the lowest available dynamic |
| 5417 | index. */ |
| 5418 | |
| 5419 | static boolean |
| 5420 | mips_elf_sort_hash_table_f (h, data) |
| 5421 | struct mips_elf_link_hash_entry *h; |
| 5422 | PTR data; |
| 5423 | { |
| 5424 | struct mips_elf_hash_sort_data *hsd |
| 5425 | = (struct mips_elf_hash_sort_data *) data; |
| 5426 | |
| 5427 | /* Symbols without dynamic symbol table entries aren't interesting |
| 5428 | at all. */ |
| 5429 | if (h->root.dynindx == -1) |
| 5430 | return true; |
| 5431 | |
| 5432 | if (h->root.got.offset != 0) |
| 5433 | h->root.dynindx = hsd->max_non_got_dynindx++; |
| 5434 | else |
| 5435 | { |
| 5436 | h->root.dynindx = --hsd->min_got_dynindx; |
| 5437 | hsd->low = (struct elf_link_hash_entry *) h; |
| 5438 | } |
| 5439 | |
| 5440 | return true; |
| 5441 | } |
| 5442 | |
| 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. */ |
| 5449 | |
| 5450 | static boolean |
| 5451 | mips_elf_sort_hash_table (info, max_local) |
| 5452 | struct bfd_link_info *info; |
| 5453 | unsigned long max_local; |
| 5454 | { |
| 5455 | struct mips_elf_hash_sort_data hsd; |
| 5456 | struct mips_got_info *g; |
| 5457 | bfd *dynobj; |
| 5458 | |
| 5459 | dynobj = elf_hash_table (info)->dynobj; |
| 5460 | |
| 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); |
| 5468 | |
| 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); |
| 5472 | |
| 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; |
| 5477 | |
| 5478 | return true; |
| 5479 | } |
| 5480 | |
| 5481 | /* Create a local GOT entry for VALUE. Return the index of the entry, |
| 5482 | or -1 if it could not be created. */ |
| 5483 | |
| 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; |
| 5490 | { |
| 5491 | if (g->assigned_gotno >= g->local_gotno) |
| 5492 | { |
| 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; |
| 5498 | } |
| 5499 | |
| 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++; |
| 5504 | } |
| 5505 | |
| 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. */ |
| 5509 | |
| 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; |
| 5515 | { |
| 5516 | asection *sgot; |
| 5517 | struct mips_got_info *g; |
| 5518 | bfd_byte *entry; |
| 5519 | |
| 5520 | g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot); |
| 5521 | |
| 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)) |
| 5527 | { |
| 5528 | bfd_vma address = MIPS_ELF_GET_WORD (abfd, entry); |
| 5529 | if (address == value) |
| 5530 | return entry - sgot->contents; |
| 5531 | } |
| 5532 | |
| 5533 | return mips_elf_create_local_got_entry (abfd, g, sgot, value); |
| 5534 | } |
| 5535 | |
| 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. */ |
| 5541 | |
| 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; |
| 5548 | { |
| 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; |
| 5555 | |
| 5556 | g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot); |
| 5557 | |
| 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)) |
| 5564 | { |
| 5565 | address = MIPS_ELF_GET_WORD (abfd, entry); |
| 5566 | |
| 5567 | if (!mips_elf_overflow_p (value - address, 16)) |
| 5568 | { |
| 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; |
| 5573 | } |
| 5574 | } |
| 5575 | |
| 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); |
| 5579 | |
| 5580 | if (offsetp) |
| 5581 | { |
| 5582 | address = MIPS_ELF_GET_WORD (abfd, entry); |
| 5583 | *offsetp = value - address; |
| 5584 | } |
| 5585 | |
| 5586 | return index; |
| 5587 | } |
| 5588 | |
| 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. */ |
| 5591 | |
| 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; |
| 5598 | { |
| 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; |
| 5605 | |
| 5606 | if (! external) |
| 5607 | { |
| 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; |
| 5613 | } |
| 5614 | |
| 5615 | g = mips_elf_got_info (elf_hash_table (info)->dynobj, &sgot); |
| 5616 | |
| 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)) |
| 5623 | { |
| 5624 | address = MIPS_ELF_GET_WORD (abfd, entry); |
| 5625 | if (address == value) |
| 5626 | { |
| 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; |
| 5631 | } |
| 5632 | } |
| 5633 | |
| 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); |
| 5637 | |
| 5638 | return index; |
| 5639 | } |
| 5640 | |
| 5641 | /* Returns the first relocation of type r_type found, beginning with |
| 5642 | RELOCATION. RELEND is one-past-the-end of the relocation table. */ |
| 5643 | |
| 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; |
| 5649 | { |
| 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) |
| 5657 | { |
| 5658 | if (ELF32_R_TYPE (relocation->r_info) == r_type) |
| 5659 | return relocation; |
| 5660 | |
| 5661 | ++relocation; |
| 5662 | } |
| 5663 | |
| 5664 | /* We didn't find it. */ |
| 5665 | bfd_set_error (bfd_error_bad_value); |
| 5666 | return NULL; |
| 5667 | } |
| 5668 | |
| 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. */ |
| 5673 | |
| 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; |
| 5685 | { |
| 5686 | Elf_Internal_Rel outrel; |
| 5687 | boolean skip; |
| 5688 | asection *sreloc; |
| 5689 | bfd *dynobj; |
| 5690 | int r_type; |
| 5691 | |
| 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); |
| 5699 | |
| 5700 | skip = false; |
| 5701 | |
| 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 |
| 5708 | { |
| 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; |
| 5723 | } |
| 5724 | |
| 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 |
| 5731 | { |
| 5732 | long indx; |
| 5733 | bfd_vma section_offset; |
| 5734 | |
| 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)) |
| 5740 | { |
| 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; |
| 5746 | } |
| 5747 | else |
| 5748 | { |
| 5749 | if (sec != NULL && bfd_is_abs_section (sec)) |
| 5750 | indx = 0; |
| 5751 | else if (sec == NULL || sec->owner == NULL) |
| 5752 | { |
| 5753 | bfd_set_error (bfd_error_bad_value); |
| 5754 | return false; |
| 5755 | } |
| 5756 | else |
| 5757 | { |
| 5758 | indx = elf_section_data (sec->output_section)->dynindx; |
| 5759 | if (indx == 0) |
| 5760 | abort (); |
| 5761 | } |
| 5762 | |
| 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; |
| 5772 | } |
| 5773 | |
| 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; |
| 5779 | |
| 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); |
| 5783 | |
| 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); |
| 5788 | } |
| 5789 | |
| 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)) |
| 5794 | { |
| 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))); |
| 5799 | } |
| 5800 | else |
| 5801 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, |
| 5802 | (((Elf32_External_Rel *) |
| 5803 | sreloc->contents) |
| 5804 | + sreloc->reloc_count)); |
| 5805 | |
| 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; |
| 5812 | |
| 5813 | /* We've now added another relocation. */ |
| 5814 | ++sreloc->reloc_count; |
| 5815 | |
| 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; |
| 5820 | |
| 5821 | /* On IRIX5, make an entry of compact relocation info. */ |
| 5822 | if (! skip && IRIX_COMPAT (output_bfd) == ict_irix5) |
| 5823 | { |
| 5824 | asection* scpt = bfd_get_section_by_name (dynobj, ".compact_rel"); |
| 5825 | bfd_byte *cr; |
| 5826 | |
| 5827 | if (scpt) |
| 5828 | { |
| 5829 | Elf32_crinfo cptrel; |
| 5830 | |
| 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; |
| 5841 | |
| 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; |
| 5848 | } |
| 5849 | } |
| 5850 | |
| 5851 | return true; |
| 5852 | } |
| 5853 | |
| 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. |
| 5857 | |
| 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. |
| 5861 | |
| 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. */ |
| 5866 | |
| 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; |
| 5892 | { |
| 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; |
| 5928 | |
| 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); |
| 5935 | |
| 5936 | /* Assume that there will be no overflow. */ |
| 5937 | overflowed_p = false; |
| 5938 | |
| 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 |
| 5947 | { |
| 5948 | /* The symbol table does not follow the rule that local symbols |
| 5949 | must come before globals. */ |
| 5950 | extsymoff = 0; |
| 5951 | } |
| 5952 | |
| 5953 | /* Figure out the value of the symbol. */ |
| 5954 | if (local_p) |
| 5955 | { |
| 5956 | Elf_Internal_Sym *sym; |
| 5957 | |
| 5958 | sym = local_syms + r_symndx; |
| 5959 | sec = local_sections[r_symndx]; |
| 5960 | |
| 5961 | symbol = sec->output_section->vma + sec->output_offset; |
| 5962 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 5963 | symbol += sym->st_value; |
| 5964 | |
| 5965 | /* MIPS16 text labels should be treated as odd. */ |
| 5966 | if (sym->st_other == STO_MIPS16) |
| 5967 | ++symbol; |
| 5968 | |
| 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); |
| 5975 | |
| 5976 | target_is_16_bit_code_p = (sym->st_other == STO_MIPS16); |
| 5977 | } |
| 5978 | else |
| 5979 | { |
| 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; |
| 5987 | |
| 5988 | /* Record the name of this symbol, for our caller. */ |
| 5989 | *namep = h->root.root.root.string; |
| 5990 | |
| 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) |
| 5994 | { |
| 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; |
| 5999 | |
| 6000 | gp_disp_p = true; |
| 6001 | } |
| 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) |
| 6009 | { |
| 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; |
| 6017 | } |
| 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) |
| 6029 | { |
| 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; |
| 6039 | } |
| 6040 | else |
| 6041 | { |
| 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; |
| 6049 | } |
| 6050 | |
| 6051 | target_is_16_bit_code_p = (h->root.other == STO_MIPS16); |
| 6052 | } |
| 6053 | |
| 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)) |
| 6062 | { |
| 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 |
| 6069 | { |
| 6070 | BFD_ASSERT (h->need_fn_stub); |
| 6071 | sec = h->fn_stub; |
| 6072 | } |
| 6073 | |
| 6074 | symbol = sec->output_section->vma + sec->output_offset; |
| 6075 | } |
| 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) |
| 6082 | { |
| 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) |
| 6087 | { |
| 6088 | asection *o; |
| 6089 | |
| 6090 | sec = NULL; |
| 6091 | for (o = input_bfd->sections; o != NULL; o = o->next) |
| 6092 | { |
| 6093 | if (strncmp (bfd_get_section_name (input_bfd, o), |
| 6094 | CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0) |
| 6095 | { |
| 6096 | sec = h->call_fp_stub; |
| 6097 | break; |
| 6098 | } |
| 6099 | } |
| 6100 | if (sec == NULL) |
| 6101 | sec = h->call_stub; |
| 6102 | } |
| 6103 | else if (h->call_stub != NULL) |
| 6104 | sec = h->call_stub; |
| 6105 | else |
| 6106 | sec = h->call_fp_stub; |
| 6107 | |
| 6108 | BFD_ASSERT (sec->_raw_size > 0); |
| 6109 | symbol = sec->output_section->vma + sec->output_offset; |
| 6110 | } |
| 6111 | |
| 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)); |
| 6116 | |
| 6117 | local_p = mips_elf_local_relocation_p (input_bfd, relocation, |
| 6118 | local_sections, true); |
| 6119 | |
| 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) |
| 6123 | { |
| 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) |
| 6133 | { |
| 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))) |
| 6142 | { |
| 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); |
| 6150 | } |
| 6151 | } |
| 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 |
| 6157 | { |
| 6158 | g = mips_elf_local_got_index (abfd, info, symbol + addend); |
| 6159 | if (g == (bfd_vma) -1) |
| 6160 | return false; |
| 6161 | } |
| 6162 | |
| 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; |
| 6167 | |
| 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; |
| 6176 | |
| 6177 | default: |
| 6178 | break; |
| 6179 | } |
| 6180 | |
| 6181 | /* Figure out what kind of relocation is being performed. */ |
| 6182 | switch (r_type) |
| 6183 | { |
| 6184 | case R_MIPS_NONE: |
| 6185 | return bfd_reloc_continue; |
| 6186 | |
| 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; |
| 6191 | |
| 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) |
| 6201 | { |
| 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, |
| 6211 | h, |
| 6212 | sec, |
| 6213 | symbol, |
| 6214 | &value, |
| 6215 | input_section)) |
| 6216 | return false; |
| 6217 | } |
| 6218 | else |
| 6219 | { |
| 6220 | if (r_type != R_MIPS_REL32) |
| 6221 | value = symbol + addend; |
| 6222 | else |
| 6223 | value = addend; |
| 6224 | } |
| 6225 | value &= howto->dst_mask; |
| 6226 | break; |
| 6227 | |
| 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; |
| 6234 | |
| 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; |
| 6240 | |
| 6241 | case R_MIPS_GNU_REL_HI16: |
| 6242 | value = mips_elf_high (addend + symbol - p); |
| 6243 | value &= howto->dst_mask; |
| 6244 | break; |
| 6245 | |
| 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; |
| 6259 | |
| 6260 | case R_MIPS_HI16: |
| 6261 | if (!gp_disp_p) |
| 6262 | { |
| 6263 | value = mips_elf_high (addend + symbol); |
| 6264 | value &= howto->dst_mask; |
| 6265 | } |
| 6266 | else |
| 6267 | { |
| 6268 | value = mips_elf_high (addend + gp - p); |
| 6269 | overflowed_p = mips_elf_overflow_p (value, 16); |
| 6270 | } |
| 6271 | break; |
| 6272 | |
| 6273 | case R_MIPS_LO16: |
| 6274 | if (!gp_disp_p) |
| 6275 | value = (symbol + addend) & howto->dst_mask; |
| 6276 | else |
| 6277 | { |
| 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: |
| 6284 | |
| 6285 | lui $gp,%hi(_gp_disp) |
| 6286 | addiu $gp,$gp,%lo(_gp_disp) |
| 6287 | addu $gp,$gp,$t9 |
| 6288 | |
| 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. */ |
| 6295 | } |
| 6296 | break; |
| 6297 | |
| 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. */ |
| 6303 | |
| 6304 | /* Fall through. */ |
| 6305 | |
| 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; |
| 6318 | |
| 6319 | case R_MIPS_GOT16: |
| 6320 | if (local_p) |
| 6321 | { |
| 6322 | boolean forced; |
| 6323 | |
| 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; |
| 6338 | } |
| 6339 | |
| 6340 | /* Fall through. */ |
| 6341 | |
| 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; |
| 6347 | |
| 6348 | case R_MIPS_GPREL32: |
| 6349 | value = (addend + symbol + gp0 - gp) & howto->dst_mask; |
| 6350 | break; |
| 6351 | |
| 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; |
| 6357 | |
| 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; |
| 6367 | |
| 6368 | case R_MIPS_GOT_LO16: |
| 6369 | case R_MIPS_CALL_LO16: |
| 6370 | value = g & howto->dst_mask; |
| 6371 | break; |
| 6372 | |
| 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; |
| 6382 | |
| 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; |
| 6387 | |
| 6388 | case R_MIPS_SUB: |
| 6389 | value = symbol - addend; |
| 6390 | value &= howto->dst_mask; |
| 6391 | break; |
| 6392 | |
| 6393 | case R_MIPS_HIGHER: |
| 6394 | value = mips_elf_higher (addend + symbol); |
| 6395 | value &= howto->dst_mask; |
| 6396 | break; |
| 6397 | |
| 6398 | case R_MIPS_HIGHEST: |
| 6399 | value = mips_elf_highest (addend + symbol); |
| 6400 | value &= howto->dst_mask; |
| 6401 | break; |
| 6402 | |
| 6403 | case R_MIPS_SCN_DISP: |
| 6404 | value = symbol + addend - sec->output_offset; |
| 6405 | value &= howto->dst_mask; |
| 6406 | break; |
| 6407 | |
| 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; |
| 6413 | |
| 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; |
| 6418 | |
| 6419 | default: |
| 6420 | /* An unrecognized relocation type. */ |
| 6421 | return bfd_reloc_notsupported; |
| 6422 | } |
| 6423 | |
| 6424 | /* Store the VALUE for our caller. */ |
| 6425 | *valuep = value; |
| 6426 | return overflowed_p ? bfd_reloc_overflow : bfd_reloc_ok; |
| 6427 | } |
| 6428 | |
| 6429 | /* Obtain the field relocated by RELOCATION. */ |
| 6430 | |
| 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; |
| 6437 | { |
| 6438 | bfd_vma x; |
| 6439 | bfd_byte *location = contents + relocation->r_offset; |
| 6440 | |
| 6441 | /* Obtain the bytes. */ |
| 6442 | x = bfd_get (8 * bfd_get_reloc_size (howto), input_bfd, location); |
| 6443 | |
| 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)); |
| 6450 | |
| 6451 | return x; |
| 6452 | } |
| 6453 | |
| 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. |
| 6460 | |
| 6461 | Returns false if anything goes wrong. */ |
| 6462 | |
| 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; |
| 6475 | { |
| 6476 | bfd_vma x; |
| 6477 | bfd_byte *location; |
| 6478 | int r_type = ELF32_R_TYPE (relocation->r_info); |
| 6479 | |
| 6480 | /* Figure out where the relocation is occurring. */ |
| 6481 | location = contents + relocation->r_offset; |
| 6482 | |
| 6483 | /* Obtain the current value. */ |
| 6484 | x = mips_elf_obtain_contents (howto, relocation, input_bfd, contents); |
| 6485 | |
| 6486 | /* Clear the field we are setting. */ |
| 6487 | x &= ~howto->dst_mask; |
| 6488 | |
| 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) |
| 6492 | { |
| 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. |
| 6496 | |
| 6497 | The format of these instructions is: |
| 6498 | |
| 6499 | +--------------+--------------------------------+ |
| 6500 | ! JALX ! X! Imm 20:16 ! Imm 25:21 ! |
| 6501 | +--------------+--------------------------------+ |
| 6502 | ! Immediate 15:0 ! |
| 6503 | +-----------------------------------------------+ |
| 6504 | |
| 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. |
| 6507 | |
| 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. |
| 6519 | |
| 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. |
| 6526 | |
| 6527 | To put it in MIPS ABI terms, the relocation field is T-targ26-16, |
| 6528 | defined as |
| 6529 | |
| 6530 | big-endian: |
| 6531 | +--------+----------------------+ |
| 6532 | | | | |
| 6533 | | | targ26-16 | |
| 6534 | |31 26|25 0| |
| 6535 | +--------+----------------------+ |
| 6536 | |
| 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)). |
| 6545 | |
| 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) */ |
| 6551 | |
| 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)); |
| 6557 | |
| 6558 | } |
| 6559 | else if (r_type == R_MIPS16_GPREL) |
| 6560 | { |
| 6561 | /* R_MIPS16_GPREL is used for GP-relative addressing in mips16 |
| 6562 | mode. A typical instruction will have a format like this: |
| 6563 | |
| 6564 | +--------------+--------------------------------+ |
| 6565 | ! EXTEND ! Imm 10:5 ! Imm 15:11 ! |
| 6566 | +--------------+--------------------------------+ |
| 6567 | ! Major ! rx ! ry ! Imm 4:0 ! |
| 6568 | +--------------+--------------------------------+ |
| 6569 | |
| 6570 | EXTEND is the five bit value 11110. Major is the instruction |
| 6571 | opcode. |
| 6572 | |
| 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. |
| 6576 | |
| 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)); |
| 6583 | } |
| 6584 | |
| 6585 | /* Set the field. */ |
| 6586 | x |= (value & howto->dst_mask); |
| 6587 | |
| 6588 | /* If required, turn JAL into JALX. */ |
| 6589 | if (require_jalx) |
| 6590 | { |
| 6591 | boolean ok; |
| 6592 | bfd_vma opcode = x >> 26; |
| 6593 | bfd_vma jalx_opcode; |
| 6594 | |
| 6595 | /* Check to see if the opcode is already JAL or JALX. */ |
| 6596 | if (r_type == R_MIPS16_26) |
| 6597 | { |
| 6598 | ok = ((opcode == 0x6) || (opcode == 0x7)); |
| 6599 | jalx_opcode = 0x7; |
| 6600 | } |
| 6601 | else |
| 6602 | { |
| 6603 | ok = ((opcode == 0x3) || (opcode == 0x1d)); |
| 6604 | jalx_opcode = 0x1d; |
| 6605 | } |
| 6606 | |
| 6607 | /* If the opcode is not JAL or JALX, there's a problem. */ |
| 6608 | if (!ok) |
| 6609 | { |
| 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; |
| 6617 | } |
| 6618 | |
| 6619 | /* Make this the JALX opcode. */ |
| 6620 | x = (x & ~(0x3f << 26)) | (jalx_opcode << 26); |
| 6621 | } |
| 6622 | |
| 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)); |
| 6628 | |
| 6629 | /* Put the value into the output. */ |
| 6630 | bfd_put (8 * bfd_get_reloc_size (howto), input_bfd, x, location); |
| 6631 | return true; |
| 6632 | } |
| 6633 | |
| 6634 | /* Returns true if SECTION is a MIPS16 stub section. */ |
| 6635 | |
| 6636 | static boolean |
| 6637 | mips_elf_stub_section_p (abfd, section) |
| 6638 | bfd *abfd ATTRIBUTE_UNUSED; |
| 6639 | asection *section; |
| 6640 | { |
| 6641 | const char *name = bfd_get_section_name (abfd, section); |
| 6642 | |
| 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); |
| 6646 | } |
| 6647 | |
| 6648 | /* Relocate a MIPS ELF section. */ |
| 6649 | |
| 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; |
| 6661 | { |
| 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; |
| 6667 | |
| 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) |
| 6671 | { |
| 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); |
| 6680 | |
| 6681 | /* Find the relocation howto for this relocation. */ |
| 6682 | if (r_type == R_MIPS_64 && !ABI_64_P (output_bfd)) |
| 6683 | { |
| 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; |
| 6691 | |
| 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; |
| 6696 | } |
| 6697 | else |
| 6698 | howto = mips_rtype_to_howto (r_type); |
| 6699 | |
| 6700 | if (!use_saved_addend_p) |
| 6701 | { |
| 6702 | Elf_Internal_Shdr *rel_hdr; |
| 6703 | |
| 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)) |
| 6716 | { |
| 6717 | /* Note that this is a REL relocation. */ |
| 6718 | rela_relocation_p = false; |
| 6719 | |
| 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; |
| 6726 | |
| 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))) |
| 6735 | { |
| 6736 | bfd_vma l; |
| 6737 | const Elf_Internal_Rela *lo16_relocation; |
| 6738 | reloc_howto_type *lo16_howto; |
| 6739 | int lo; |
| 6740 | |
| 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.) |
| 6746 | |
| 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; |
| 6756 | |
| 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); |
| 6764 | |
| 6765 | addend <<= 16; |
| 6766 | |
| 6767 | /* Compute the combined addend. */ |
| 6768 | addend += l; |
| 6769 | } |
| 6770 | else if (r_type == R_MIPS16_GPREL) |
| 6771 | { |
| 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)); |
| 6778 | } |
| 6779 | } |
| 6780 | else |
| 6781 | addend = rel->r_addend; |
| 6782 | } |
| 6783 | |
| 6784 | if (info->relocateable) |
| 6785 | { |
| 6786 | Elf_Internal_Sym *sym; |
| 6787 | unsigned long r_symndx; |
| 6788 | |
| 6789 | if (r_type == R_MIPS_64 && !ABI_64_P (output_bfd) |
| 6790 | && bfd_big_endian (input_bfd)) |
| 6791 | rel->r_offset -= 4; |
| 6792 | |
| 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. */ |
| 6799 | |
| 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; |
| 6804 | |
| 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; |
| 6818 | |
| 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; |
| 6824 | |
| 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; |
| 6837 | |
| 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 |
| 6843 | { |
| 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; |
| 6850 | |
| 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. */ |
| 6856 | { |
| 6857 | bfd_vma sign_bits; |
| 6858 | bfd_vma low_bits; |
| 6859 | bfd_vma high_bits; |
| 6860 | |
| 6861 | if (addend & ((bfd_vma) 1 << 31)) |
| 6862 | sign_bits = ((bfd_vma) 1 << 32) - 1; |
| 6863 | else |
| 6864 | sign_bits = 0; |
| 6865 | |
| 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)) |
| 6869 | { |
| 6870 | /* Store the sign-bits (which are most significant) |
| 6871 | first. */ |
| 6872 | low_bits = sign_bits; |
| 6873 | high_bits = addend; |
| 6874 | } |
| 6875 | else |
| 6876 | { |
| 6877 | low_bits = addend; |
| 6878 | high_bits = sign_bits; |
| 6879 | } |
| 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; |
| 6885 | } |
| 6886 | |
| 6887 | if (!mips_elf_perform_relocation (info, howto, rel, addend, |
| 6888 | input_bfd, input_section, |
| 6889 | contents, false)) |
| 6890 | return false; |
| 6891 | } |
| 6892 | |
| 6893 | /* Go on to the next relocation. */ |
| 6894 | continue; |
| 6895 | } |
| 6896 | |
| 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; |
| 6907 | |
| 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)) |
| 6921 | { |
| 6922 | case bfd_reloc_continue: |
| 6923 | /* There's nothing to do. */ |
| 6924 | continue; |
| 6925 | |
| 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; |
| 6932 | |
| 6933 | case bfd_reloc_notsupported: |
| 6934 | abort (); |
| 6935 | break; |
| 6936 | |
| 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. */ |
| 6941 | ; |
| 6942 | else |
| 6943 | { |
| 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; |
| 6949 | } |
| 6950 | break; |
| 6951 | |
| 6952 | case bfd_reloc_ok: |
| 6953 | break; |
| 6954 | |
| 6955 | default: |
| 6956 | abort (); |
| 6957 | break; |
| 6958 | } |
| 6959 | |
| 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) |
| 6963 | { |
| 6964 | addend = value; |
| 6965 | continue; |
| 6966 | } |
| 6967 | |
| 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. */ |
| 6976 | { |
| 6977 | bfd_vma sign_bits; |
| 6978 | bfd_vma low_bits; |
| 6979 | bfd_vma high_bits; |
| 6980 | |
| 6981 | if (value & ((bfd_vma) 1 << 31)) |
| 6982 | sign_bits = ((bfd_vma) 1 << 32) - 1; |
| 6983 | else |
| 6984 | sign_bits = 0; |
| 6985 | |
| 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)) |
| 6989 | { |
| 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; |
| 6996 | } |
| 6997 | else |
| 6998 | { |
| 6999 | low_bits = value; |
| 7000 | high_bits = sign_bits; |
| 7001 | } |
| 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; |
| 7007 | } |
| 7008 | |
| 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; |
| 7014 | } |
| 7015 | |
| 7016 | return true; |
| 7017 | } |
| 7018 | |
| 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. */ |
| 7022 | |
| 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; |
| 7031 | { |
| 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; |
| 7038 | |
| 7039 | if (sym->st_other == STO_MIPS16 |
| 7040 | && (sym->st_value & 1) != 0) |
| 7041 | --sym->st_value; |
| 7042 | |
| 7043 | return true; |
| 7044 | } |
| 7045 | \f |
| 7046 | /* Functions for the dynamic linker. */ |
| 7047 | |
| 7048 | /* The name of the dynamic interpreter. This is put in the .interp |
| 7049 | section. */ |
| 7050 | |
| 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") |
| 7055 | |
| 7056 | /* Create dynamic sections when linking against a dynamic object. */ |
| 7057 | |
| 7058 | boolean |
| 7059 | _bfd_mips_elf_create_dynamic_sections (abfd, info) |
| 7060 | bfd *abfd; |
| 7061 | struct bfd_link_info *info; |
| 7062 | { |
| 7063 | struct elf_link_hash_entry *h; |
| 7064 | flagword flags; |
| 7065 | register asection *s; |
| 7066 | const char * const *namep; |
| 7067 | |
| 7068 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 7069 | | SEC_LINKER_CREATED | SEC_READONLY); |
| 7070 | |
| 7071 | /* Mips ABI requests the .dynamic section to be read only. */ |
| 7072 | s = bfd_get_section_by_name (abfd, ".dynamic"); |
| 7073 | if (s != NULL) |
| 7074 | { |
| 7075 | if (! bfd_set_section_flags (abfd, s, flags)) |
| 7076 | return false; |
| 7077 | } |
| 7078 | |
| 7079 | /* We need to create .got section. */ |
| 7080 | if (! mips_elf_create_got_section (abfd, info)) |
| 7081 | return false; |
| 7082 | |
| 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; |
| 7089 | |
| 7090 | /* Create .stub section. */ |
| 7091 | if (bfd_get_section_by_name (abfd, |
| 7092 | MIPS_ELF_STUB_SECTION_NAME (abfd)) == NULL) |
| 7093 | { |
| 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; |
| 7100 | } |
| 7101 | |
| 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) |
| 7105 | { |
| 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; |
| 7112 | } |
| 7113 | |
| 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) |
| 7119 | { |
| 7120 | for (namep = mips_elf_dynsym_rtproc_names; *namep != NULL; namep++) |
| 7121 | { |
| 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; |
| 7132 | |
| 7133 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 7134 | return false; |
| 7135 | } |
| 7136 | |
| 7137 | /* We need to create a .compact_rel section. */ |
| 7138 | if (SGI_COMPAT (abfd)) |
| 7139 | { |
| 7140 | if (!mips_elf_create_compact_rel_section (abfd, info)) |
| 7141 | return false; |
| 7142 | } |
| 7143 | |
| 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); |
| 7160 | } |
| 7161 | |
| 7162 | if (!info->shared) |
| 7163 | { |
| 7164 | h = NULL; |
| 7165 | if (SGI_COMPAT (abfd)) |
| 7166 | { |
| 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; |
| 7173 | } |
| 7174 | else |
| 7175 | { |
| 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; |
| 7183 | } |
| 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; |
| 7187 | |
| 7188 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 7189 | return false; |
| 7190 | |
| 7191 | if (! mips_elf_hash_table (info)->use_rld_obj_head) |
| 7192 | { |
| 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); |
| 7199 | |
| 7200 | h = NULL; |
| 7201 | if (SGI_COMPAT (abfd)) |
| 7202 | { |
| 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; |
| 7209 | } |
| 7210 | else |
| 7211 | { |
| 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; |
| 7219 | } |
| 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; |
| 7223 | |
| 7224 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 7225 | return false; |
| 7226 | } |
| 7227 | } |
| 7228 | |
| 7229 | return true; |
| 7230 | } |
| 7231 | |
| 7232 | /* Create the .compact_rel section. */ |
| 7233 | |
| 7234 | static boolean |
| 7235 | mips_elf_create_compact_rel_section (abfd, info) |
| 7236 | bfd *abfd; |
| 7237 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 7238 | { |
| 7239 | flagword flags; |
| 7240 | register asection *s; |
| 7241 | |
| 7242 | if (bfd_get_section_by_name (abfd, ".compact_rel") == NULL) |
| 7243 | { |
| 7244 | flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| 7245 | | SEC_READONLY); |
| 7246 | |
| 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; |
| 7253 | |
| 7254 | s->_raw_size = sizeof (Elf32_External_compact_rel); |
| 7255 | } |
| 7256 | |
| 7257 | return true; |
| 7258 | } |
| 7259 | |
| 7260 | /* Create the .got section to hold the global offset table. */ |
| 7261 | |
| 7262 | static boolean |
| 7263 | mips_elf_create_got_section (abfd, info) |
| 7264 | bfd *abfd; |
| 7265 | struct bfd_link_info *info; |
| 7266 | { |
| 7267 | flagword flags; |
| 7268 | register asection *s; |
| 7269 | struct elf_link_hash_entry *h; |
| 7270 | struct mips_got_info *g; |
| 7271 | |
| 7272 | /* This function may be called more than once. */ |
| 7273 | if (mips_elf_got_section (abfd)) |
| 7274 | return true; |
| 7275 | |
| 7276 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 7277 | | SEC_LINKER_CREATED); |
| 7278 | |
| 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; |
| 7284 | |
| 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; |
| 7298 | |
| 7299 | if (info->shared |
| 7300 | && ! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 7301 | return false; |
| 7302 | |
| 7303 | /* The first several global offset table entries are reserved. */ |
| 7304 | s->_raw_size = MIPS_RESERVED_GOTNO * MIPS_ELF_GOT_SIZE (abfd); |
| 7305 | |
| 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) |
| 7314 | { |
| 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; |
| 7319 | } |
| 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; |
| 7323 | |
| 7324 | return true; |
| 7325 | } |
| 7326 | |
| 7327 | /* Returns the .msym section for ABFD, creating it if it does not |
| 7328 | already exist. Returns NULL to indicate error. */ |
| 7329 | |
| 7330 | static asection * |
| 7331 | mips_elf_create_msym_section (abfd) |
| 7332 | bfd *abfd; |
| 7333 | { |
| 7334 | asection *s; |
| 7335 | |
| 7336 | s = bfd_get_section_by_name (abfd, MIPS_ELF_MSYM_SECTION_NAME (abfd)); |
| 7337 | if (!s) |
| 7338 | { |
| 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; |
| 7350 | } |
| 7351 | |
| 7352 | return s; |
| 7353 | } |
| 7354 | |
| 7355 | /* Add room for N relocations to the .rel.dyn section in ABFD. */ |
| 7356 | |
| 7357 | static void |
| 7358 | mips_elf_allocate_dynamic_relocations (abfd, n) |
| 7359 | bfd *abfd; |
| 7360 | unsigned int n; |
| 7361 | { |
| 7362 | asection *s; |
| 7363 | |
| 7364 | s = bfd_get_section_by_name (abfd, MIPS_ELF_REL_DYN_SECTION_NAME (abfd)); |
| 7365 | BFD_ASSERT (s != NULL); |
| 7366 | |
| 7367 | if (s->_raw_size == 0) |
| 7368 | { |
| 7369 | /* Make room for a null element. */ |
| 7370 | s->_raw_size += MIPS_ELF_REL_SIZE (abfd); |
| 7371 | ++s->reloc_count; |
| 7372 | } |
| 7373 | s->_raw_size += n * MIPS_ELF_REL_SIZE (abfd); |
| 7374 | } |
| 7375 | |
| 7376 | /* Look through the relocs for a section during the first phase, and |
| 7377 | allocate space in the global offset table. */ |
| 7378 | |
| 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; |
| 7385 | { |
| 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; |
| 7397 | |
| 7398 | if (info->relocateable) |
| 7399 | return true; |
| 7400 | |
| 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; |
| 7405 | |
| 7406 | /* Check for the mips16 stub sections. */ |
| 7407 | |
| 7408 | name = bfd_get_section_name (abfd, sec); |
| 7409 | if (strncmp (name, FN_STUB, sizeof FN_STUB - 1) == 0) |
| 7410 | { |
| 7411 | unsigned long r_symndx; |
| 7412 | |
| 7413 | /* Look at the relocation information to figure out which symbol |
| 7414 | this is for. */ |
| 7415 | |
| 7416 | r_symndx = ELF32_R_SYM (relocs->r_info); |
| 7417 | |
| 7418 | if (r_symndx < extsymoff |
| 7419 | || sym_hashes[r_symndx - extsymoff] == NULL) |
| 7420 | { |
| 7421 | asection *o; |
| 7422 | |
| 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) |
| 7427 | { |
| 7428 | Elf_Internal_Rela *sec_relocs; |
| 7429 | const Elf_Internal_Rela *r, *rend; |
| 7430 | |
| 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; |
| 7441 | |
| 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; |
| 7448 | |
| 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; |
| 7454 | |
| 7455 | if (! info->keep_memory) |
| 7456 | free (sec_relocs); |
| 7457 | |
| 7458 | if (r < rend) |
| 7459 | break; |
| 7460 | } |
| 7461 | |
| 7462 | if (o == NULL) |
| 7463 | { |
| 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; |
| 7471 | } |
| 7472 | |
| 7473 | /* Record this stub in an array of local symbol stubs for |
| 7474 | this BFD. */ |
| 7475 | if (elf_tdata (abfd)->local_stubs == NULL) |
| 7476 | { |
| 7477 | unsigned long symcount; |
| 7478 | asection **n; |
| 7479 | |
| 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; |
| 7489 | } |
| 7490 | |
| 7491 | elf_tdata (abfd)->local_stubs[r_symndx] = sec; |
| 7492 | |
| 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. */ |
| 7497 | } |
| 7498 | else |
| 7499 | { |
| 7500 | struct mips_elf_link_hash_entry *h; |
| 7501 | |
| 7502 | h = ((struct mips_elf_link_hash_entry *) |
| 7503 | sym_hashes[r_symndx - extsymoff]); |
| 7504 | |
| 7505 | /* H is the symbol this stub is for. */ |
| 7506 | |
| 7507 | h->fn_stub = sec; |
| 7508 | mips_elf_hash_table (info)->mips16_stubs_seen = true; |
| 7509 | } |
| 7510 | } |
| 7511 | else if (strncmp (name, CALL_STUB, sizeof CALL_STUB - 1) == 0 |
| 7512 | || strncmp (name, CALL_FP_STUB, sizeof CALL_FP_STUB - 1) == 0) |
| 7513 | { |
| 7514 | unsigned long r_symndx; |
| 7515 | struct mips_elf_link_hash_entry *h; |
| 7516 | asection **loc; |
| 7517 | |
| 7518 | /* Look at the relocation information to figure out which symbol |
| 7519 | this is for. */ |
| 7520 | |
| 7521 | r_symndx = ELF32_R_SYM (relocs->r_info); |
| 7522 | |
| 7523 | if (r_symndx < extsymoff |
| 7524 | || sym_hashes[r_symndx - extsymoff] == NULL) |
| 7525 | { |
| 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; |
| 7534 | } |
| 7535 | |
| 7536 | h = ((struct mips_elf_link_hash_entry *) |
| 7537 | sym_hashes[r_symndx - extsymoff]); |
| 7538 | |
| 7539 | /* H is the symbol this stub is for. */ |
| 7540 | |
| 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; |
| 7545 | |
| 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) |
| 7555 | { |
| 7556 | sec->flags |= SEC_EXCLUDE; |
| 7557 | return true; |
| 7558 | } |
| 7559 | |
| 7560 | *loc = sec; |
| 7561 | mips_elf_hash_table (info)->mips16_stubs_seen = true; |
| 7562 | } |
| 7563 | |
| 7564 | if (dynobj == NULL) |
| 7565 | { |
| 7566 | sgot = NULL; |
| 7567 | g = NULL; |
| 7568 | } |
| 7569 | else |
| 7570 | { |
| 7571 | sgot = mips_elf_got_section (dynobj); |
| 7572 | if (sgot == NULL) |
| 7573 | g = NULL; |
| 7574 | else |
| 7575 | { |
| 7576 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 7577 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 7578 | BFD_ASSERT (g != NULL); |
| 7579 | } |
| 7580 | } |
| 7581 | |
| 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) |
| 7586 | { |
| 7587 | unsigned long r_symndx; |
| 7588 | int r_type; |
| 7589 | struct elf_link_hash_entry *h; |
| 7590 | |
| 7591 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 7592 | r_type = ELF32_R_TYPE (rel->r_info); |
| 7593 | |
| 7594 | if (r_symndx < extsymoff) |
| 7595 | h = NULL; |
| 7596 | else if (r_symndx >= extsymoff + (symtab_hdr->sh_size / symtab_hdr->sh_entsize)) |
| 7597 | { |
| 7598 | (*_bfd_error_handler) |
| 7599 | (_("Malformed reloc detected for section %s"), name); |
| 7600 | bfd_set_error (bfd_error_bad_value); |
| 7601 | return false; |
| 7602 | } |
| 7603 | else |
| 7604 | { |
| 7605 | h = sym_hashes[r_symndx - extsymoff]; |
| 7606 | |
| 7607 | /* This may be an indirect symbol created because of a version. */ |
| 7608 | if (h != NULL) |
| 7609 | { |
| 7610 | while (h->root.type == bfd_link_hash_indirect) |
| 7611 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 7612 | } |
| 7613 | } |
| 7614 | |
| 7615 | /* Some relocs require a global offset table. */ |
| 7616 | if (dynobj == NULL || sgot == NULL) |
| 7617 | { |
| 7618 | switch (r_type) |
| 7619 | { |
| 7620 | case R_MIPS_GOT16: |
| 7621 | case R_MIPS_CALL16: |
| 7622 | case R_MIPS_CALL_HI16: |
| 7623 | case R_MIPS_CALL_LO16: |
| 7624 | case R_MIPS_GOT_HI16: |
| 7625 | case R_MIPS_GOT_LO16: |
| 7626 | case R_MIPS_GOT_PAGE: |
| 7627 | case R_MIPS_GOT_OFST: |
| 7628 | case R_MIPS_GOT_DISP: |
| 7629 | if (dynobj == NULL) |
| 7630 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 7631 | if (! mips_elf_create_got_section (dynobj, info)) |
| 7632 | return false; |
| 7633 | g = mips_elf_got_info (dynobj, &sgot); |
| 7634 | break; |
| 7635 | |
| 7636 | case R_MIPS_32: |
| 7637 | case R_MIPS_REL32: |
| 7638 | case R_MIPS_64: |
| 7639 | if (dynobj == NULL |
| 7640 | && (info->shared || h != NULL) |
| 7641 | && (sec->flags & SEC_ALLOC) != 0) |
| 7642 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 7643 | break; |
| 7644 | |
| 7645 | default: |
| 7646 | break; |
| 7647 | } |
| 7648 | } |
| 7649 | |
| 7650 | if (!h && (r_type == R_MIPS_CALL_LO16 |
| 7651 | || r_type == R_MIPS_GOT_LO16 |
| 7652 | || r_type == R_MIPS_GOT_DISP)) |
| 7653 | { |
| 7654 | /* We may need a local GOT entry for this relocation. We |
| 7655 | don't count R_MIPS_GOT_PAGE because we can estimate the |
| 7656 | maximum number of pages needed by looking at the size of |
| 7657 | the segment. Similar comments apply to R_MIPS_GOT16. We |
| 7658 | don't count R_MIPS_GOT_HI16, or R_MIPS_CALL_HI16 because |
| 7659 | these are always followed by an R_MIPS_GOT_LO16 or |
| 7660 | R_MIPS_CALL_LO16. |
| 7661 | |
| 7662 | This estimation is very conservative since we can merge |
| 7663 | duplicate entries in the GOT. In order to be less |
| 7664 | conservative, we could actually build the GOT here, |
| 7665 | rather than in relocate_section. */ |
| 7666 | g->local_gotno++; |
| 7667 | sgot->_raw_size += MIPS_ELF_GOT_SIZE (dynobj); |
| 7668 | } |
| 7669 | |
| 7670 | switch (r_type) |
| 7671 | { |
| 7672 | case R_MIPS_CALL16: |
| 7673 | if (h == NULL) |
| 7674 | { |
| 7675 | (*_bfd_error_handler) |
| 7676 | (_("%s: CALL16 reloc at 0x%lx not against global symbol"), |
| 7677 | bfd_get_filename (abfd), (unsigned long) rel->r_offset); |
| 7678 | bfd_set_error (bfd_error_bad_value); |
| 7679 | return false; |
| 7680 | } |
| 7681 | /* Fall through. */ |
| 7682 | |
| 7683 | case R_MIPS_CALL_HI16: |
| 7684 | case R_MIPS_CALL_LO16: |
| 7685 | if (h != NULL) |
| 7686 | { |
| 7687 | /* This symbol requires a global offset table entry. */ |
| 7688 | if (!mips_elf_record_global_got_symbol (h, info, g)) |
| 7689 | return false; |
| 7690 | |
| 7691 | /* We need a stub, not a plt entry for the undefined |
| 7692 | function. But we record it as if it needs plt. See |
| 7693 | elf_adjust_dynamic_symbol in elflink.h. */ |
| 7694 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 7695 | h->type = STT_FUNC; |
| 7696 | } |
| 7697 | break; |
| 7698 | |
| 7699 | case R_MIPS_GOT16: |
| 7700 | case R_MIPS_GOT_HI16: |
| 7701 | case R_MIPS_GOT_LO16: |
| 7702 | case R_MIPS_GOT_DISP: |
| 7703 | /* This symbol requires a global offset table entry. */ |
| 7704 | if (h && !mips_elf_record_global_got_symbol (h, info, g)) |
| 7705 | return false; |
| 7706 | break; |
| 7707 | |
| 7708 | case R_MIPS_32: |
| 7709 | case R_MIPS_REL32: |
| 7710 | case R_MIPS_64: |
| 7711 | if ((info->shared || h != NULL) |
| 7712 | && (sec->flags & SEC_ALLOC) != 0) |
| 7713 | { |
| 7714 | if (sreloc == NULL) |
| 7715 | { |
| 7716 | const char *name = MIPS_ELF_REL_DYN_SECTION_NAME (dynobj); |
| 7717 | |
| 7718 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 7719 | if (sreloc == NULL) |
| 7720 | { |
| 7721 | sreloc = bfd_make_section (dynobj, name); |
| 7722 | if (sreloc == NULL |
| 7723 | || ! bfd_set_section_flags (dynobj, sreloc, |
| 7724 | (SEC_ALLOC |
| 7725 | | SEC_LOAD |
| 7726 | | SEC_HAS_CONTENTS |
| 7727 | | SEC_IN_MEMORY |
| 7728 | | SEC_LINKER_CREATED |
| 7729 | | SEC_READONLY)) |
| 7730 | || ! bfd_set_section_alignment (dynobj, sreloc, |
| 7731 | 4)) |
| 7732 | return false; |
| 7733 | } |
| 7734 | } |
| 7735 | if (info->shared) |
| 7736 | /* When creating a shared object, we must copy these |
| 7737 | reloc types into the output file as R_MIPS_REL32 |
| 7738 | relocs. We make room for this reloc in the |
| 7739 | .rel.dyn reloc section. */ |
| 7740 | mips_elf_allocate_dynamic_relocations (dynobj, 1); |
| 7741 | else |
| 7742 | { |
| 7743 | struct mips_elf_link_hash_entry *hmips; |
| 7744 | |
| 7745 | /* We only need to copy this reloc if the symbol is |
| 7746 | defined in a dynamic object. */ |
| 7747 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 7748 | ++hmips->possibly_dynamic_relocs; |
| 7749 | } |
| 7750 | |
| 7751 | /* Even though we don't directly need a GOT entry for |
| 7752 | this symbol, a symbol must have a dynamic symbol |
| 7753 | table index greater that DT_MIPS_GOTSYM if there are |
| 7754 | dynamic relocations against it. */ |
| 7755 | if (h != NULL |
| 7756 | && !mips_elf_record_global_got_symbol (h, info, g)) |
| 7757 | return false; |
| 7758 | } |
| 7759 | |
| 7760 | if (SGI_COMPAT (abfd)) |
| 7761 | mips_elf_hash_table (info)->compact_rel_size += |
| 7762 | sizeof (Elf32_External_crinfo); |
| 7763 | break; |
| 7764 | |
| 7765 | case R_MIPS_26: |
| 7766 | case R_MIPS_GPREL16: |
| 7767 | case R_MIPS_LITERAL: |
| 7768 | case R_MIPS_GPREL32: |
| 7769 | if (SGI_COMPAT (abfd)) |
| 7770 | mips_elf_hash_table (info)->compact_rel_size += |
| 7771 | sizeof (Elf32_External_crinfo); |
| 7772 | break; |
| 7773 | |
| 7774 | /* This relocation describes the C++ object vtable hierarchy. |
| 7775 | Reconstruct it for later use during GC. */ |
| 7776 | case R_MIPS_GNU_VTINHERIT: |
| 7777 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 7778 | return false; |
| 7779 | break; |
| 7780 | |
| 7781 | /* This relocation describes which C++ vtable entries are actually |
| 7782 | used. Record for later use during GC. */ |
| 7783 | case R_MIPS_GNU_VTENTRY: |
| 7784 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
| 7785 | return false; |
| 7786 | break; |
| 7787 | |
| 7788 | default: |
| 7789 | break; |
| 7790 | } |
| 7791 | |
| 7792 | /* If this reloc is not a 16 bit call, and it has a global |
| 7793 | symbol, then we will need the fn_stub if there is one. |
| 7794 | References from a stub section do not count. */ |
| 7795 | if (h != NULL |
| 7796 | && r_type != R_MIPS16_26 |
| 7797 | && strncmp (bfd_get_section_name (abfd, sec), FN_STUB, |
| 7798 | sizeof FN_STUB - 1) != 0 |
| 7799 | && strncmp (bfd_get_section_name (abfd, sec), CALL_STUB, |
| 7800 | sizeof CALL_STUB - 1) != 0 |
| 7801 | && strncmp (bfd_get_section_name (abfd, sec), CALL_FP_STUB, |
| 7802 | sizeof CALL_FP_STUB - 1) != 0) |
| 7803 | { |
| 7804 | struct mips_elf_link_hash_entry *mh; |
| 7805 | |
| 7806 | mh = (struct mips_elf_link_hash_entry *) h; |
| 7807 | mh->need_fn_stub = true; |
| 7808 | } |
| 7809 | } |
| 7810 | |
| 7811 | return true; |
| 7812 | } |
| 7813 | |
| 7814 | /* Return the section that should be marked against GC for a given |
| 7815 | relocation. */ |
| 7816 | |
| 7817 | asection * |
| 7818 | _bfd_mips_elf_gc_mark_hook (abfd, info, rel, h, sym) |
| 7819 | bfd *abfd; |
| 7820 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 7821 | Elf_Internal_Rela *rel; |
| 7822 | struct elf_link_hash_entry *h; |
| 7823 | Elf_Internal_Sym *sym; |
| 7824 | { |
| 7825 | /* ??? Do mips16 stub sections need to be handled special? */ |
| 7826 | |
| 7827 | if (h != NULL) |
| 7828 | { |
| 7829 | switch (ELF32_R_TYPE (rel->r_info)) |
| 7830 | { |
| 7831 | case R_MIPS_GNU_VTINHERIT: |
| 7832 | case R_MIPS_GNU_VTENTRY: |
| 7833 | break; |
| 7834 | |
| 7835 | default: |
| 7836 | switch (h->root.type) |
| 7837 | { |
| 7838 | case bfd_link_hash_defined: |
| 7839 | case bfd_link_hash_defweak: |
| 7840 | return h->root.u.def.section; |
| 7841 | |
| 7842 | case bfd_link_hash_common: |
| 7843 | return h->root.u.c.p->section; |
| 7844 | |
| 7845 | default: |
| 7846 | break; |
| 7847 | } |
| 7848 | } |
| 7849 | } |
| 7850 | else |
| 7851 | { |
| 7852 | if (!(elf_bad_symtab (abfd) |
| 7853 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) |
| 7854 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) |
| 7855 | && sym->st_shndx != SHN_COMMON)) |
| 7856 | { |
| 7857 | return bfd_section_from_elf_index (abfd, sym->st_shndx); |
| 7858 | } |
| 7859 | } |
| 7860 | |
| 7861 | return NULL; |
| 7862 | } |
| 7863 | |
| 7864 | /* Update the got entry reference counts for the section being removed. */ |
| 7865 | |
| 7866 | boolean |
| 7867 | _bfd_mips_elf_gc_sweep_hook (abfd, info, sec, relocs) |
| 7868 | bfd *abfd ATTRIBUTE_UNUSED; |
| 7869 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 7870 | asection *sec ATTRIBUTE_UNUSED; |
| 7871 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; |
| 7872 | { |
| 7873 | #if 0 |
| 7874 | Elf_Internal_Shdr *symtab_hdr; |
| 7875 | struct elf_link_hash_entry **sym_hashes; |
| 7876 | bfd_signed_vma *local_got_refcounts; |
| 7877 | const Elf_Internal_Rela *rel, *relend; |
| 7878 | unsigned long r_symndx; |
| 7879 | struct elf_link_hash_entry *h; |
| 7880 | |
| 7881 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 7882 | sym_hashes = elf_sym_hashes (abfd); |
| 7883 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 7884 | |
| 7885 | relend = relocs + sec->reloc_count; |
| 7886 | for (rel = relocs; rel < relend; rel++) |
| 7887 | switch (ELF32_R_TYPE (rel->r_info)) |
| 7888 | { |
| 7889 | case R_MIPS_GOT16: |
| 7890 | case R_MIPS_CALL16: |
| 7891 | case R_MIPS_CALL_HI16: |
| 7892 | case R_MIPS_CALL_LO16: |
| 7893 | case R_MIPS_GOT_HI16: |
| 7894 | case R_MIPS_GOT_LO16: |
| 7895 | /* ??? It would seem that the existing MIPS code does no sort |
| 7896 | of reference counting or whatnot on its GOT and PLT entries, |
| 7897 | so it is not possible to garbage collect them at this time. */ |
| 7898 | break; |
| 7899 | |
| 7900 | default: |
| 7901 | break; |
| 7902 | } |
| 7903 | #endif |
| 7904 | |
| 7905 | return true; |
| 7906 | } |
| 7907 | |
| 7908 | /* Copy data from a MIPS ELF indirect symbol to its direct symbol, |
| 7909 | hiding the old indirect symbol. Process additional relocation |
| 7910 | information. */ |
| 7911 | |
| 7912 | void |
| 7913 | _bfd_mips_elf_copy_indirect_symbol (dir, ind) |
| 7914 | struct elf_link_hash_entry *dir, *ind; |
| 7915 | { |
| 7916 | struct mips_elf_link_hash_entry *dirmips, *indmips; |
| 7917 | |
| 7918 | _bfd_elf_link_hash_copy_indirect (dir, ind); |
| 7919 | |
| 7920 | dirmips = (struct mips_elf_link_hash_entry *) dir; |
| 7921 | indmips = (struct mips_elf_link_hash_entry *) ind; |
| 7922 | dirmips->possibly_dynamic_relocs += indmips->possibly_dynamic_relocs; |
| 7923 | if (dirmips->min_dyn_reloc_index == 0 |
| 7924 | || (indmips->min_dyn_reloc_index != 0 |
| 7925 | && indmips->min_dyn_reloc_index < dirmips->min_dyn_reloc_index)) |
| 7926 | dirmips->min_dyn_reloc_index = indmips->min_dyn_reloc_index; |
| 7927 | } |
| 7928 | |
| 7929 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 7930 | regular object. The current definition is in some section of the |
| 7931 | dynamic object, but we're not including those sections. We have to |
| 7932 | change the definition to something the rest of the link can |
| 7933 | understand. */ |
| 7934 | |
| 7935 | boolean |
| 7936 | _bfd_mips_elf_adjust_dynamic_symbol (info, h) |
| 7937 | struct bfd_link_info *info; |
| 7938 | struct elf_link_hash_entry *h; |
| 7939 | { |
| 7940 | bfd *dynobj; |
| 7941 | struct mips_elf_link_hash_entry *hmips; |
| 7942 | asection *s; |
| 7943 | |
| 7944 | dynobj = elf_hash_table (info)->dynobj; |
| 7945 | |
| 7946 | /* Make sure we know what is going on here. */ |
| 7947 | BFD_ASSERT (dynobj != NULL |
| 7948 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| 7949 | || h->weakdef != NULL |
| 7950 | || ((h->elf_link_hash_flags |
| 7951 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 7952 | && (h->elf_link_hash_flags |
| 7953 | & ELF_LINK_HASH_REF_REGULAR) != 0 |
| 7954 | && (h->elf_link_hash_flags |
| 7955 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| 7956 | |
| 7957 | /* If this symbol is defined in a dynamic object, we need to copy |
| 7958 | any R_MIPS_32 or R_MIPS_REL32 relocs against it into the output |
| 7959 | file. */ |
| 7960 | hmips = (struct mips_elf_link_hash_entry *) h; |
| 7961 | if (! info->relocateable |
| 7962 | && hmips->possibly_dynamic_relocs != 0 |
| 7963 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 7964 | mips_elf_allocate_dynamic_relocations (dynobj, |
| 7965 | hmips->possibly_dynamic_relocs); |
| 7966 | |
| 7967 | /* For a function, create a stub, if needed. */ |
| 7968 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 7969 | { |
| 7970 | if (! elf_hash_table (info)->dynamic_sections_created) |
| 7971 | return true; |
| 7972 | |
| 7973 | /* If this symbol is not defined in a regular file, then set |
| 7974 | the symbol to the stub location. This is required to make |
| 7975 | function pointers compare as equal between the normal |
| 7976 | executable and the shared library. */ |
| 7977 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 7978 | { |
| 7979 | /* We need .stub section. */ |
| 7980 | s = bfd_get_section_by_name (dynobj, |
| 7981 | MIPS_ELF_STUB_SECTION_NAME (dynobj)); |
| 7982 | BFD_ASSERT (s != NULL); |
| 7983 | |
| 7984 | h->root.u.def.section = s; |
| 7985 | h->root.u.def.value = s->_raw_size; |
| 7986 | |
| 7987 | /* XXX Write this stub address somewhere. */ |
| 7988 | h->plt.offset = s->_raw_size; |
| 7989 | |
| 7990 | /* Make room for this stub code. */ |
| 7991 | s->_raw_size += MIPS_FUNCTION_STUB_SIZE; |
| 7992 | |
| 7993 | /* The last half word of the stub will be filled with the index |
| 7994 | of this symbol in .dynsym section. */ |
| 7995 | return true; |
| 7996 | } |
| 7997 | } |
| 7998 | else if ((h->type == STT_FUNC) |
| 7999 | && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0) |
| 8000 | { |
| 8001 | /* This will set the entry for this symbol in the GOT to 0, and |
| 8002 | the dynamic linker will take care of this. */ |
| 8003 | h->root.u.def.value = 0; |
| 8004 | return true; |
| 8005 | } |
| 8006 | |
| 8007 | /* If this is a weak symbol, and there is a real definition, the |
| 8008 | processor independent code will have arranged for us to see the |
| 8009 | real definition first, and we can just use the same value. */ |
| 8010 | if (h->weakdef != NULL) |
| 8011 | { |
| 8012 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 8013 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 8014 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 8015 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 8016 | return true; |
| 8017 | } |
| 8018 | |
| 8019 | /* This is a reference to a symbol defined by a dynamic object which |
| 8020 | is not a function. */ |
| 8021 | |
| 8022 | return true; |
| 8023 | } |
| 8024 | |
| 8025 | /* This function is called after all the input files have been read, |
| 8026 | and the input sections have been assigned to output sections. We |
| 8027 | check for any mips16 stub sections that we can discard. */ |
| 8028 | |
| 8029 | static boolean mips_elf_check_mips16_stubs |
| 8030 | PARAMS ((struct mips_elf_link_hash_entry *, PTR)); |
| 8031 | |
| 8032 | boolean |
| 8033 | _bfd_mips_elf_always_size_sections (output_bfd, info) |
| 8034 | bfd *output_bfd; |
| 8035 | struct bfd_link_info *info; |
| 8036 | { |
| 8037 | asection *ri; |
| 8038 | |
| 8039 | /* The .reginfo section has a fixed size. */ |
| 8040 | ri = bfd_get_section_by_name (output_bfd, ".reginfo"); |
| 8041 | if (ri != NULL) |
| 8042 | bfd_set_section_size (output_bfd, ri, sizeof (Elf32_External_RegInfo)); |
| 8043 | |
| 8044 | if (info->relocateable |
| 8045 | || ! mips_elf_hash_table (info)->mips16_stubs_seen) |
| 8046 | return true; |
| 8047 | |
| 8048 | mips_elf_link_hash_traverse (mips_elf_hash_table (info), |
| 8049 | mips_elf_check_mips16_stubs, |
| 8050 | (PTR) NULL); |
| 8051 | |
| 8052 | return true; |
| 8053 | } |
| 8054 | |
| 8055 | /* Check the mips16 stubs for a particular symbol, and see if we can |
| 8056 | discard them. */ |
| 8057 | |
| 8058 | /*ARGSUSED*/ |
| 8059 | static boolean |
| 8060 | mips_elf_check_mips16_stubs (h, data) |
| 8061 | struct mips_elf_link_hash_entry *h; |
| 8062 | PTR data ATTRIBUTE_UNUSED; |
| 8063 | { |
| 8064 | if (h->fn_stub != NULL |
| 8065 | && ! h->need_fn_stub) |
| 8066 | { |
| 8067 | /* We don't need the fn_stub; the only references to this symbol |
| 8068 | are 16 bit calls. Clobber the size to 0 to prevent it from |
| 8069 | being included in the link. */ |
| 8070 | h->fn_stub->_raw_size = 0; |
| 8071 | h->fn_stub->_cooked_size = 0; |
| 8072 | h->fn_stub->flags &= ~ SEC_RELOC; |
| 8073 | h->fn_stub->reloc_count = 0; |
| 8074 | h->fn_stub->flags |= SEC_EXCLUDE; |
| 8075 | } |
| 8076 | |
| 8077 | if (h->call_stub != NULL |
| 8078 | && h->root.other == STO_MIPS16) |
| 8079 | { |
| 8080 | /* We don't need the call_stub; this is a 16 bit function, so |
| 8081 | calls from other 16 bit functions are OK. Clobber the size |
| 8082 | to 0 to prevent it from being included in the link. */ |
| 8083 | h->call_stub->_raw_size = 0; |
| 8084 | h->call_stub->_cooked_size = 0; |
| 8085 | h->call_stub->flags &= ~ SEC_RELOC; |
| 8086 | h->call_stub->reloc_count = 0; |
| 8087 | h->call_stub->flags |= SEC_EXCLUDE; |
| 8088 | } |
| 8089 | |
| 8090 | if (h->call_fp_stub != NULL |
| 8091 | && h->root.other == STO_MIPS16) |
| 8092 | { |
| 8093 | /* We don't need the call_stub; this is a 16 bit function, so |
| 8094 | calls from other 16 bit functions are OK. Clobber the size |
| 8095 | to 0 to prevent it from being included in the link. */ |
| 8096 | h->call_fp_stub->_raw_size = 0; |
| 8097 | h->call_fp_stub->_cooked_size = 0; |
| 8098 | h->call_fp_stub->flags &= ~ SEC_RELOC; |
| 8099 | h->call_fp_stub->reloc_count = 0; |
| 8100 | h->call_fp_stub->flags |= SEC_EXCLUDE; |
| 8101 | } |
| 8102 | |
| 8103 | return true; |
| 8104 | } |
| 8105 | |
| 8106 | /* Set the sizes of the dynamic sections. */ |
| 8107 | |
| 8108 | boolean |
| 8109 | _bfd_mips_elf_size_dynamic_sections (output_bfd, info) |
| 8110 | bfd *output_bfd; |
| 8111 | struct bfd_link_info *info; |
| 8112 | { |
| 8113 | bfd *dynobj; |
| 8114 | asection *s; |
| 8115 | boolean reltext; |
| 8116 | struct mips_got_info *g = NULL; |
| 8117 | |
| 8118 | dynobj = elf_hash_table (info)->dynobj; |
| 8119 | BFD_ASSERT (dynobj != NULL); |
| 8120 | |
| 8121 | if (elf_hash_table (info)->dynamic_sections_created) |
| 8122 | { |
| 8123 | /* Set the contents of the .interp section to the interpreter. */ |
| 8124 | if (! info->shared) |
| 8125 | { |
| 8126 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 8127 | BFD_ASSERT (s != NULL); |
| 8128 | s->_raw_size |
| 8129 | = strlen (ELF_DYNAMIC_INTERPRETER (output_bfd)) + 1; |
| 8130 | s->contents |
| 8131 | = (bfd_byte *) ELF_DYNAMIC_INTERPRETER (output_bfd); |
| 8132 | } |
| 8133 | } |
| 8134 | |
| 8135 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 8136 | determined the sizes of the various dynamic sections. Allocate |
| 8137 | memory for them. */ |
| 8138 | reltext = false; |
| 8139 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 8140 | { |
| 8141 | const char *name; |
| 8142 | boolean strip; |
| 8143 | |
| 8144 | /* It's OK to base decisions on the section name, because none |
| 8145 | of the dynobj section names depend upon the input files. */ |
| 8146 | name = bfd_get_section_name (dynobj, s); |
| 8147 | |
| 8148 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 8149 | continue; |
| 8150 | |
| 8151 | strip = false; |
| 8152 | |
| 8153 | if (strncmp (name, ".rel", 4) == 0) |
| 8154 | { |
| 8155 | if (s->_raw_size == 0) |
| 8156 | { |
| 8157 | /* We only strip the section if the output section name |
| 8158 | has the same name. Otherwise, there might be several |
| 8159 | input sections for this output section. FIXME: This |
| 8160 | code is probably not needed these days anyhow, since |
| 8161 | the linker now does not create empty output sections. */ |
| 8162 | if (s->output_section != NULL |
| 8163 | && strcmp (name, |
| 8164 | bfd_get_section_name (s->output_section->owner, |
| 8165 | s->output_section)) == 0) |
| 8166 | strip = true; |
| 8167 | } |
| 8168 | else |
| 8169 | { |
| 8170 | const char *outname; |
| 8171 | asection *target; |
| 8172 | |
| 8173 | /* If this relocation section applies to a read only |
| 8174 | section, then we probably need a DT_TEXTREL entry. |
| 8175 | If the relocation section is .rel.dyn, we always |
| 8176 | assert a DT_TEXTREL entry rather than testing whether |
| 8177 | there exists a relocation to a read only section or |
| 8178 | not. */ |
| 8179 | outname = bfd_get_section_name (output_bfd, |
| 8180 | s->output_section); |
| 8181 | target = bfd_get_section_by_name (output_bfd, outname + 4); |
| 8182 | if ((target != NULL |
| 8183 | && (target->flags & SEC_READONLY) != 0 |
| 8184 | && (target->flags & SEC_ALLOC) != 0) |
| 8185 | || strcmp (outname, |
| 8186 | MIPS_ELF_REL_DYN_SECTION_NAME (output_bfd)) == 0) |
| 8187 | reltext = true; |
| 8188 | |
| 8189 | /* We use the reloc_count field as a counter if we need |
| 8190 | to copy relocs into the output file. */ |
| 8191 | if (strcmp (name, |
| 8192 | MIPS_ELF_REL_DYN_SECTION_NAME (output_bfd)) != 0) |
| 8193 | s->reloc_count = 0; |
| 8194 | } |
| 8195 | } |
| 8196 | else if (strncmp (name, ".got", 4) == 0) |
| 8197 | { |
| 8198 | int i; |
| 8199 | bfd_size_type loadable_size = 0; |
| 8200 | bfd_size_type local_gotno; |
| 8201 | struct _bfd *sub; |
| 8202 | |
| 8203 | BFD_ASSERT (elf_section_data (s) != NULL); |
| 8204 | g = (struct mips_got_info *) elf_section_data (s)->tdata; |
| 8205 | BFD_ASSERT (g != NULL); |
| 8206 | |
| 8207 | /* Calculate the total loadable size of the output. That |
| 8208 | will give us the maximum number of GOT_PAGE entries |
| 8209 | required. */ |
| 8210 | for (sub = info->input_bfds; sub; sub = sub->link_next) |
| 8211 | { |
| 8212 | asection *subsection; |
| 8213 | |
| 8214 | for (subsection = sub->sections; |
| 8215 | subsection; |
| 8216 | subsection = subsection->next) |
| 8217 | { |
| 8218 | if ((subsection->flags & SEC_ALLOC) == 0) |
| 8219 | continue; |
| 8220 | loadable_size += (subsection->_raw_size + 0xf) & ~0xf; |
| 8221 | } |
| 8222 | } |
| 8223 | loadable_size += MIPS_FUNCTION_STUB_SIZE; |
| 8224 | |
| 8225 | /* Assume there are two loadable segments consisting of |
| 8226 | contiguous sections. Is 5 enough? */ |
| 8227 | local_gotno = (loadable_size >> 16) + 5; |
| 8228 | if (IRIX_COMPAT (output_bfd) == ict_irix6) |
| 8229 | /* It's possible we will need GOT_PAGE entries as well as |
| 8230 | GOT16 entries. Often, these will be able to share GOT |
| 8231 | entries, but not always. */ |
| 8232 | local_gotno *= 2; |
| 8233 | |
| 8234 | g->local_gotno += local_gotno; |
| 8235 | s->_raw_size += local_gotno * MIPS_ELF_GOT_SIZE (dynobj); |
| 8236 | |
| 8237 | /* There has to be a global GOT entry for every symbol with |
| 8238 | a dynamic symbol table index of DT_MIPS_GOTSYM or |
| 8239 | higher. Therefore, it make sense to put those symbols |
| 8240 | that need GOT entries at the end of the symbol table. We |
| 8241 | do that here. */ |
| 8242 | if (!mips_elf_sort_hash_table (info, 1)) |
| 8243 | return false; |
| 8244 | |
| 8245 | if (g->global_gotsym != NULL) |
| 8246 | i = elf_hash_table (info)->dynsymcount - g->global_gotsym->dynindx; |
| 8247 | else |
| 8248 | /* If there are no global symbols, or none requiring |
| 8249 | relocations, then GLOBAL_GOTSYM will be NULL. */ |
| 8250 | i = 0; |
| 8251 | g->global_gotno = i; |
| 8252 | s->_raw_size += i * MIPS_ELF_GOT_SIZE (dynobj); |
| 8253 | } |
| 8254 | else if (strcmp (name, MIPS_ELF_STUB_SECTION_NAME (output_bfd)) == 0) |
| 8255 | { |
| 8256 | /* Irix rld assumes that the function stub isn't at the end |
| 8257 | of .text section. So put a dummy. XXX */ |
| 8258 | s->_raw_size += MIPS_FUNCTION_STUB_SIZE; |
| 8259 | } |
| 8260 | else if (! info->shared |
| 8261 | && ! mips_elf_hash_table (info)->use_rld_obj_head |
| 8262 | && strncmp (name, ".rld_map", 8) == 0) |
| 8263 | { |
| 8264 | /* We add a room for __rld_map. It will be filled in by the |
| 8265 | rtld to contain a pointer to the _r_debug structure. */ |
| 8266 | s->_raw_size += 4; |
| 8267 | } |
| 8268 | else if (SGI_COMPAT (output_bfd) |
| 8269 | && strncmp (name, ".compact_rel", 12) == 0) |
| 8270 | s->_raw_size += mips_elf_hash_table (info)->compact_rel_size; |
| 8271 | else if (strcmp (name, MIPS_ELF_MSYM_SECTION_NAME (output_bfd)) |
| 8272 | == 0) |
| 8273 | s->_raw_size = (sizeof (Elf32_External_Msym) |
| 8274 | * (elf_hash_table (info)->dynsymcount |
| 8275 | + bfd_count_sections (output_bfd))); |
| 8276 | else if (strncmp (name, ".init", 5) != 0) |
| 8277 | { |
| 8278 | /* It's not one of our sections, so don't allocate space. */ |
| 8279 | continue; |
| 8280 | } |
| 8281 | |
| 8282 | if (strip) |
| 8283 | { |
| 8284 | _bfd_strip_section_from_output (info, s); |
| 8285 | continue; |
| 8286 | } |
| 8287 | |
| 8288 | /* Allocate memory for the section contents. */ |
| 8289 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| 8290 | if (s->contents == NULL && s->_raw_size != 0) |
| 8291 | { |
| 8292 | bfd_set_error (bfd_error_no_memory); |
| 8293 | return false; |
| 8294 | } |
| 8295 | } |
| 8296 | |
| 8297 | if (elf_hash_table (info)->dynamic_sections_created) |
| 8298 | { |
| 8299 | /* Add some entries to the .dynamic section. We fill in the |
| 8300 | values later, in elf_mips_finish_dynamic_sections, but we |
| 8301 | must add the entries now so that we get the correct size for |
| 8302 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 8303 | dynamic linker and used by the debugger. */ |
| 8304 | if (! info->shared) |
| 8305 | { |
| 8306 | /* SGI object has the equivalence of DT_DEBUG in the |
| 8307 | DT_MIPS_RLD_MAP entry. */ |
| 8308 | if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_MAP, 0)) |
| 8309 | return false; |
| 8310 | if (!SGI_COMPAT (output_bfd)) |
| 8311 | { |
| 8312 | if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0)) |
| 8313 | return false; |
| 8314 | } |
| 8315 | } |
| 8316 | else |
| 8317 | { |
| 8318 | /* Shared libraries on traditional mips have DT_DEBUG. */ |
| 8319 | if (!SGI_COMPAT (output_bfd)) |
| 8320 | { |
| 8321 | if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0)) |
| 8322 | return false; |
| 8323 | } |
| 8324 | } |
| 8325 | if (reltext && SGI_COMPAT(output_bfd)) |
| 8326 | { |
| 8327 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_TEXTREL, 0)) |
| 8328 | return false; |
| 8329 | info->flags |= DF_TEXTREL; |
| 8330 | } |
| 8331 | |
| 8332 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTGOT, 0)) |
| 8333 | return false; |
| 8334 | |
| 8335 | if (bfd_get_section_by_name (dynobj, |
| 8336 | MIPS_ELF_REL_DYN_SECTION_NAME (dynobj))) |
| 8337 | { |
| 8338 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_REL, 0)) |
| 8339 | return false; |
| 8340 | |
| 8341 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELSZ, 0)) |
| 8342 | return false; |
| 8343 | |
| 8344 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELENT, 0)) |
| 8345 | return false; |
| 8346 | } |
| 8347 | |
| 8348 | if (SGI_COMPAT (output_bfd)) |
| 8349 | { |
| 8350 | if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_CONFLICTNO, 0)) |
| 8351 | return false; |
| 8352 | } |
| 8353 | |
| 8354 | if (SGI_COMPAT (output_bfd)) |
| 8355 | { |
| 8356 | if (!MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LIBLISTNO, 0)) |
| 8357 | return false; |
| 8358 | } |
| 8359 | |
| 8360 | if (bfd_get_section_by_name (dynobj, ".conflict") != NULL) |
| 8361 | { |
| 8362 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_CONFLICT, 0)) |
| 8363 | return false; |
| 8364 | |
| 8365 | s = bfd_get_section_by_name (dynobj, ".liblist"); |
| 8366 | BFD_ASSERT (s != NULL); |
| 8367 | |
| 8368 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LIBLIST, 0)) |
| 8369 | return false; |
| 8370 | } |
| 8371 | |
| 8372 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_RLD_VERSION, 0)) |
| 8373 | return false; |
| 8374 | |
| 8375 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_FLAGS, 0)) |
| 8376 | return false; |
| 8377 | |
| 8378 | #if 0 |
| 8379 | /* Time stamps in executable files are a bad idea. */ |
| 8380 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_TIME_STAMP, 0)) |
| 8381 | return false; |
| 8382 | #endif |
| 8383 | |
| 8384 | #if 0 /* FIXME */ |
| 8385 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_ICHECKSUM, 0)) |
| 8386 | return false; |
| 8387 | #endif |
| 8388 | |
| 8389 | #if 0 /* FIXME */ |
| 8390 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_IVERSION, 0)) |
| 8391 | return false; |
| 8392 | #endif |
| 8393 | |
| 8394 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_BASE_ADDRESS, 0)) |
| 8395 | return false; |
| 8396 | |
| 8397 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_LOCAL_GOTNO, 0)) |
| 8398 | return false; |
| 8399 | |
| 8400 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_SYMTABNO, 0)) |
| 8401 | return false; |
| 8402 | |
| 8403 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_UNREFEXTNO, 0)) |
| 8404 | return false; |
| 8405 | |
| 8406 | if (! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_GOTSYM, 0)) |
| 8407 | return false; |
| 8408 | |
| 8409 | if (IRIX_COMPAT (dynobj) == ict_irix5 |
| 8410 | && ! MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_HIPAGENO, 0)) |
| 8411 | return false; |
| 8412 | |
| 8413 | if (IRIX_COMPAT (dynobj) == ict_irix6 |
| 8414 | && (bfd_get_section_by_name |
| 8415 | (dynobj, MIPS_ELF_OPTIONS_SECTION_NAME (dynobj))) |
| 8416 | && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_OPTIONS, 0)) |
| 8417 | return false; |
| 8418 | |
| 8419 | if (bfd_get_section_by_name (dynobj, |
| 8420 | MIPS_ELF_MSYM_SECTION_NAME (dynobj)) |
| 8421 | && !MIPS_ELF_ADD_DYNAMIC_ENTRY (info, DT_MIPS_MSYM, 0)) |
| 8422 | return false; |
| 8423 | } |
| 8424 | |
| 8425 | return true; |
| 8426 | } |
| 8427 | |
| 8428 | /* If NAME is one of the special IRIX6 symbols defined by the linker, |
| 8429 | adjust it appropriately now. */ |
| 8430 | |
| 8431 | static void |
| 8432 | mips_elf_irix6_finish_dynamic_symbol (abfd, name, sym) |
| 8433 | bfd *abfd ATTRIBUTE_UNUSED; |
| 8434 | const char *name; |
| 8435 | Elf_Internal_Sym *sym; |
| 8436 | { |
| 8437 | /* The linker script takes care of providing names and values for |
| 8438 | these, but we must place them into the right sections. */ |
| 8439 | static const char* const text_section_symbols[] = { |
| 8440 | "_ftext", |
| 8441 | "_etext", |
| 8442 | "__dso_displacement", |
| 8443 | "__elf_header", |
| 8444 | "__program_header_table", |
| 8445 | NULL |
| 8446 | }; |
| 8447 | |
| 8448 | static const char* const data_section_symbols[] = { |
| 8449 | "_fdata", |
| 8450 | "_edata", |
| 8451 | "_end", |
| 8452 | "_fbss", |
| 8453 | NULL |
| 8454 | }; |
| 8455 | |
| 8456 | const char* const *p; |
| 8457 | int i; |
| 8458 | |
| 8459 | for (i = 0; i < 2; ++i) |
| 8460 | for (p = (i == 0) ? text_section_symbols : data_section_symbols; |
| 8461 | *p; |
| 8462 | ++p) |
| 8463 | if (strcmp (*p, name) == 0) |
| 8464 | { |
| 8465 | /* All of these symbols are given type STT_SECTION by the |
| 8466 | IRIX6 linker. */ |
| 8467 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 8468 | |
| 8469 | /* The IRIX linker puts these symbols in special sections. */ |
| 8470 | if (i == 0) |
| 8471 | sym->st_shndx = SHN_MIPS_TEXT; |
| 8472 | else |
| 8473 | sym->st_shndx = SHN_MIPS_DATA; |
| 8474 | |
| 8475 | break; |
| 8476 | } |
| 8477 | } |
| 8478 | |
| 8479 | /* Finish up dynamic symbol handling. We set the contents of various |
| 8480 | dynamic sections here. */ |
| 8481 | |
| 8482 | boolean |
| 8483 | _bfd_mips_elf_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 8484 | bfd *output_bfd; |
| 8485 | struct bfd_link_info *info; |
| 8486 | struct elf_link_hash_entry *h; |
| 8487 | Elf_Internal_Sym *sym; |
| 8488 | { |
| 8489 | bfd *dynobj; |
| 8490 | bfd_vma gval; |
| 8491 | asection *sgot; |
| 8492 | asection *smsym; |
| 8493 | struct mips_got_info *g; |
| 8494 | const char *name; |
| 8495 | struct mips_elf_link_hash_entry *mh; |
| 8496 | |
| 8497 | dynobj = elf_hash_table (info)->dynobj; |
| 8498 | gval = sym->st_value; |
| 8499 | mh = (struct mips_elf_link_hash_entry *) h; |
| 8500 | |
| 8501 | if (h->plt.offset != (bfd_vma) -1) |
| 8502 | { |
| 8503 | asection *s; |
| 8504 | bfd_byte *p; |
| 8505 | bfd_byte stub[MIPS_FUNCTION_STUB_SIZE]; |
| 8506 | |
| 8507 | /* This symbol has a stub. Set it up. */ |
| 8508 | |
| 8509 | BFD_ASSERT (h->dynindx != -1); |
| 8510 | |
| 8511 | s = bfd_get_section_by_name (dynobj, |
| 8512 | MIPS_ELF_STUB_SECTION_NAME (dynobj)); |
| 8513 | BFD_ASSERT (s != NULL); |
| 8514 | |
| 8515 | /* Fill the stub. */ |
| 8516 | p = stub; |
| 8517 | bfd_put_32 (output_bfd, STUB_LW(output_bfd), p); |
| 8518 | p += 4; |
| 8519 | bfd_put_32 (output_bfd, STUB_MOVE(output_bfd), p); |
| 8520 | p += 4; |
| 8521 | |
| 8522 | /* FIXME: Can h->dynindex be more than 64K? */ |
| 8523 | if (h->dynindx & 0xffff0000) |
| 8524 | return false; |
| 8525 | |
| 8526 | bfd_put_32 (output_bfd, STUB_JALR, p); |
| 8527 | p += 4; |
| 8528 | bfd_put_32 (output_bfd, STUB_LI16(output_bfd) + h->dynindx, p); |
| 8529 | |
| 8530 | BFD_ASSERT (h->plt.offset <= s->_raw_size); |
| 8531 | memcpy (s->contents + h->plt.offset, stub, MIPS_FUNCTION_STUB_SIZE); |
| 8532 | |
| 8533 | /* Mark the symbol as undefined. plt.offset != -1 occurs |
| 8534 | only for the referenced symbol. */ |
| 8535 | sym->st_shndx = SHN_UNDEF; |
| 8536 | |
| 8537 | /* The run-time linker uses the st_value field of the symbol |
| 8538 | to reset the global offset table entry for this external |
| 8539 | to its stub address when unlinking a shared object. */ |
| 8540 | gval = s->output_section->vma + s->output_offset + h->plt.offset; |
| 8541 | sym->st_value = gval; |
| 8542 | } |
| 8543 | |
| 8544 | BFD_ASSERT (h->dynindx != -1 |
| 8545 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0); |
| 8546 | |
| 8547 | sgot = mips_elf_got_section (dynobj); |
| 8548 | BFD_ASSERT (sgot != NULL); |
| 8549 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 8550 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 8551 | BFD_ASSERT (g != NULL); |
| 8552 | |
| 8553 | /* Run through the global symbol table, creating GOT entries for all |
| 8554 | the symbols that need them. */ |
| 8555 | if (g->global_gotsym != NULL |
| 8556 | && h->dynindx >= g->global_gotsym->dynindx) |
| 8557 | { |
| 8558 | bfd_vma offset; |
| 8559 | bfd_vma value; |
| 8560 | |
| 8561 | if (sym->st_value) |
| 8562 | value = sym->st_value; |
| 8563 | else |
| 8564 | { |
| 8565 | /* For an entity defined in a shared object, this will be |
| 8566 | NULL. (For functions in shared objects for |
| 8567 | which we have created stubs, ST_VALUE will be non-NULL. |
| 8568 | That's because such the functions are now no longer defined |
| 8569 | in a shared object.) */ |
| 8570 | |
| 8571 | if (info->shared && h->root.type == bfd_link_hash_undefined) |
| 8572 | value = 0; |
| 8573 | else |
| 8574 | value = h->root.u.def.value; |
| 8575 | } |
| 8576 | offset = mips_elf_global_got_index (dynobj, h); |
| 8577 | MIPS_ELF_PUT_WORD (output_bfd, value, sgot->contents + offset); |
| 8578 | } |
| 8579 | |
| 8580 | /* Create a .msym entry, if appropriate. */ |
| 8581 | smsym = bfd_get_section_by_name (dynobj, |
| 8582 | MIPS_ELF_MSYM_SECTION_NAME (dynobj)); |
| 8583 | if (smsym) |
| 8584 | { |
| 8585 | Elf32_Internal_Msym msym; |
| 8586 | |
| 8587 | msym.ms_hash_value = bfd_elf_hash (h->root.root.string); |
| 8588 | /* It is undocumented what the `1' indicates, but IRIX6 uses |
| 8589 | this value. */ |
| 8590 | msym.ms_info = ELF32_MS_INFO (mh->min_dyn_reloc_index, 1); |
| 8591 | bfd_mips_elf_swap_msym_out |
| 8592 | (dynobj, &msym, |
| 8593 | ((Elf32_External_Msym *) smsym->contents) + h->dynindx); |
| 8594 | } |
| 8595 | |
| 8596 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 8597 | name = h->root.root.string; |
| 8598 | if (strcmp (name, "_DYNAMIC") == 0 |
| 8599 | || strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 8600 | sym->st_shndx = SHN_ABS; |
| 8601 | else if (strcmp (name, "_DYNAMIC_LINK") == 0 |
| 8602 | || strcmp (name, "_DYNAMIC_LINKING") == 0) |
| 8603 | { |
| 8604 | sym->st_shndx = SHN_ABS; |
| 8605 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 8606 | sym->st_value = 1; |
| 8607 | } |
| 8608 | else if (strcmp (name, "_gp_disp") == 0) |
| 8609 | { |
| 8610 | sym->st_shndx = SHN_ABS; |
| 8611 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 8612 | sym->st_value = elf_gp (output_bfd); |
| 8613 | } |
| 8614 | else if (SGI_COMPAT (output_bfd)) |
| 8615 | { |
| 8616 | if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0 |
| 8617 | || strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0) |
| 8618 | { |
| 8619 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 8620 | sym->st_other = STO_PROTECTED; |
| 8621 | sym->st_value = 0; |
| 8622 | sym->st_shndx = SHN_MIPS_DATA; |
| 8623 | } |
| 8624 | else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0) |
| 8625 | { |
| 8626 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 8627 | sym->st_other = STO_PROTECTED; |
| 8628 | sym->st_value = mips_elf_hash_table (info)->procedure_count; |
| 8629 | sym->st_shndx = SHN_ABS; |
| 8630 | } |
| 8631 | else if (sym->st_shndx != SHN_UNDEF && sym->st_shndx != SHN_ABS) |
| 8632 | { |
| 8633 | if (h->type == STT_FUNC) |
| 8634 | sym->st_shndx = SHN_MIPS_TEXT; |
| 8635 | else if (h->type == STT_OBJECT) |
| 8636 | sym->st_shndx = SHN_MIPS_DATA; |
| 8637 | } |
| 8638 | } |
| 8639 | |
| 8640 | /* Handle the IRIX6-specific symbols. */ |
| 8641 | if (IRIX_COMPAT (output_bfd) == ict_irix6) |
| 8642 | mips_elf_irix6_finish_dynamic_symbol (output_bfd, name, sym); |
| 8643 | |
| 8644 | if (! info->shared) |
| 8645 | { |
| 8646 | if (! mips_elf_hash_table (info)->use_rld_obj_head |
| 8647 | && (strcmp (name, "__rld_map") == 0 |
| 8648 | || strcmp (name, "__RLD_MAP") == 0)) |
| 8649 | { |
| 8650 | asection *s = bfd_get_section_by_name (dynobj, ".rld_map"); |
| 8651 | BFD_ASSERT (s != NULL); |
| 8652 | sym->st_value = s->output_section->vma + s->output_offset; |
| 8653 | bfd_put_32 (output_bfd, (bfd_vma) 0, s->contents); |
| 8654 | if (mips_elf_hash_table (info)->rld_value == 0) |
| 8655 | mips_elf_hash_table (info)->rld_value = sym->st_value; |
| 8656 | } |
| 8657 | else if (mips_elf_hash_table (info)->use_rld_obj_head |
| 8658 | && strcmp (name, "__rld_obj_head") == 0) |
| 8659 | { |
| 8660 | /* IRIX6 does not use a .rld_map section. */ |
| 8661 | if (IRIX_COMPAT (output_bfd) == ict_irix5 |
| 8662 | || IRIX_COMPAT (output_bfd) == ict_none) |
| 8663 | BFD_ASSERT (bfd_get_section_by_name (dynobj, ".rld_map") |
| 8664 | != NULL); |
| 8665 | mips_elf_hash_table (info)->rld_value = sym->st_value; |
| 8666 | } |
| 8667 | } |
| 8668 | |
| 8669 | /* If this is a mips16 symbol, force the value to be even. */ |
| 8670 | if (sym->st_other == STO_MIPS16 |
| 8671 | && (sym->st_value & 1) != 0) |
| 8672 | --sym->st_value; |
| 8673 | |
| 8674 | return true; |
| 8675 | } |
| 8676 | |
| 8677 | /* Finish up the dynamic sections. */ |
| 8678 | |
| 8679 | boolean |
| 8680 | _bfd_mips_elf_finish_dynamic_sections (output_bfd, info) |
| 8681 | bfd *output_bfd; |
| 8682 | struct bfd_link_info *info; |
| 8683 | { |
| 8684 | bfd *dynobj; |
| 8685 | asection *sdyn; |
| 8686 | asection *sgot; |
| 8687 | struct mips_got_info *g; |
| 8688 | |
| 8689 | dynobj = elf_hash_table (info)->dynobj; |
| 8690 | |
| 8691 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 8692 | |
| 8693 | sgot = mips_elf_got_section (dynobj); |
| 8694 | if (sgot == NULL) |
| 8695 | g = NULL; |
| 8696 | else |
| 8697 | { |
| 8698 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 8699 | g = (struct mips_got_info *) elf_section_data (sgot)->tdata; |
| 8700 | BFD_ASSERT (g != NULL); |
| 8701 | } |
| 8702 | |
| 8703 | if (elf_hash_table (info)->dynamic_sections_created) |
| 8704 | { |
| 8705 | bfd_byte *b; |
| 8706 | |
| 8707 | BFD_ASSERT (sdyn != NULL); |
| 8708 | BFD_ASSERT (g != NULL); |
| 8709 | |
| 8710 | for (b = sdyn->contents; |
| 8711 | b < sdyn->contents + sdyn->_raw_size; |
| 8712 | b += MIPS_ELF_DYN_SIZE (dynobj)) |
| 8713 | { |
| 8714 | Elf_Internal_Dyn dyn; |
| 8715 | const char *name; |
| 8716 | size_t elemsize; |
| 8717 | asection *s; |
| 8718 | boolean swap_out_p; |
| 8719 | |
| 8720 | /* Read in the current dynamic entry. */ |
| 8721 | (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn); |
| 8722 | |
| 8723 | /* Assume that we're going to modify it and write it out. */ |
| 8724 | swap_out_p = true; |
| 8725 | |
| 8726 | switch (dyn.d_tag) |
| 8727 | { |
| 8728 | case DT_RELENT: |
| 8729 | s = (bfd_get_section_by_name |
| 8730 | (dynobj, |
| 8731 | MIPS_ELF_REL_DYN_SECTION_NAME (dynobj))); |
| 8732 | BFD_ASSERT (s != NULL); |
| 8733 | dyn.d_un.d_val = MIPS_ELF_REL_SIZE (dynobj); |
| 8734 | break; |
| 8735 | |
| 8736 | case DT_STRSZ: |
| 8737 | /* Rewrite DT_STRSZ. */ |
| 8738 | dyn.d_un.d_val = |
| 8739 | _bfd_stringtab_size (elf_hash_table (info)->dynstr); |
| 8740 | break; |
| 8741 | |
| 8742 | case DT_PLTGOT: |
| 8743 | name = ".got"; |
| 8744 | goto get_vma; |
| 8745 | case DT_MIPS_CONFLICT: |
| 8746 | name = ".conflict"; |
| 8747 | goto get_vma; |
| 8748 | case DT_MIPS_LIBLIST: |
| 8749 | name = ".liblist"; |
| 8750 | get_vma: |
| 8751 | s = bfd_get_section_by_name (output_bfd, name); |
| 8752 | BFD_ASSERT (s != NULL); |
| 8753 | dyn.d_un.d_ptr = s->vma; |
| 8754 | break; |
| 8755 | |
| 8756 | case DT_MIPS_RLD_VERSION: |
| 8757 | dyn.d_un.d_val = 1; /* XXX */ |
| 8758 | break; |
| 8759 | |
| 8760 | case DT_MIPS_FLAGS: |
| 8761 | dyn.d_un.d_val = RHF_NOTPOT; /* XXX */ |
| 8762 | break; |
| 8763 | |
| 8764 | case DT_MIPS_CONFLICTNO: |
| 8765 | name = ".conflict"; |
| 8766 | elemsize = sizeof (Elf32_Conflict); |
| 8767 | goto set_elemno; |
| 8768 | |
| 8769 | case DT_MIPS_LIBLISTNO: |
| 8770 | name = ".liblist"; |
| 8771 | elemsize = sizeof (Elf32_Lib); |
| 8772 | set_elemno: |
| 8773 | s = bfd_get_section_by_name (output_bfd, name); |
| 8774 | if (s != NULL) |
| 8775 | { |
| 8776 | if (s->_cooked_size != 0) |
| 8777 | dyn.d_un.d_val = s->_cooked_size / elemsize; |
| 8778 | else |
| 8779 | dyn.d_un.d_val = s->_raw_size / elemsize; |
| 8780 | } |
| 8781 | else |
| 8782 | dyn.d_un.d_val = 0; |
| 8783 | break; |
| 8784 | |
| 8785 | case DT_MIPS_TIME_STAMP: |
| 8786 | time ((time_t *) &dyn.d_un.d_val); |
| 8787 | break; |
| 8788 | |
| 8789 | case DT_MIPS_ICHECKSUM: |
| 8790 | /* XXX FIXME: */ |
| 8791 | swap_out_p = false; |
| 8792 | break; |
| 8793 | |
| 8794 | case DT_MIPS_IVERSION: |
| 8795 | /* XXX FIXME: */ |
| 8796 | swap_out_p = false; |
| 8797 | break; |
| 8798 | |
| 8799 | case DT_MIPS_BASE_ADDRESS: |
| 8800 | s = output_bfd->sections; |
| 8801 | BFD_ASSERT (s != NULL); |
| 8802 | dyn.d_un.d_ptr = s->vma & ~(0xffff); |
| 8803 | break; |
| 8804 | |
| 8805 | case DT_MIPS_LOCAL_GOTNO: |
| 8806 | dyn.d_un.d_val = g->local_gotno; |
| 8807 | break; |
| 8808 | |
| 8809 | case DT_MIPS_UNREFEXTNO: |
| 8810 | /* The index into the dynamic symbol table which is the |
| 8811 | entry of the first external symbol that is not |
| 8812 | referenced within the same object. */ |
| 8813 | dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1; |
| 8814 | break; |
| 8815 | |
| 8816 | case DT_MIPS_GOTSYM: |
| 8817 | if (g->global_gotsym) |
| 8818 | { |
| 8819 | dyn.d_un.d_val = g->global_gotsym->dynindx; |
| 8820 | break; |
| 8821 | } |
| 8822 | /* In case if we don't have global got symbols we default |
| 8823 | to setting DT_MIPS_GOTSYM to the same value as |
| 8824 | DT_MIPS_SYMTABNO, so we just fall through. */ |
| 8825 | |
| 8826 | case DT_MIPS_SYMTABNO: |
| 8827 | name = ".dynsym"; |
| 8828 | elemsize = MIPS_ELF_SYM_SIZE (output_bfd); |
| 8829 | s = bfd_get_section_by_name (output_bfd, name); |
| 8830 | BFD_ASSERT (s != NULL); |
| 8831 | |
| 8832 | if (s->_cooked_size != 0) |
| 8833 | dyn.d_un.d_val = s->_cooked_size / elemsize; |
| 8834 | else |
| 8835 | dyn.d_un.d_val = s->_raw_size / elemsize; |
| 8836 | break; |
| 8837 | |
| 8838 | case DT_MIPS_HIPAGENO: |
| 8839 | dyn.d_un.d_val = g->local_gotno - MIPS_RESERVED_GOTNO; |
| 8840 | break; |
| 8841 | |
| 8842 | case DT_MIPS_RLD_MAP: |
| 8843 | dyn.d_un.d_ptr = mips_elf_hash_table (info)->rld_value; |
| 8844 | break; |
| 8845 | |
| 8846 | case DT_MIPS_OPTIONS: |
| 8847 | s = (bfd_get_section_by_name |
| 8848 | (output_bfd, MIPS_ELF_OPTIONS_SECTION_NAME (output_bfd))); |
| 8849 | dyn.d_un.d_ptr = s->vma; |
| 8850 | break; |
| 8851 | |
| 8852 | case DT_MIPS_MSYM: |
| 8853 | s = (bfd_get_section_by_name |
| 8854 | (output_bfd, MIPS_ELF_MSYM_SECTION_NAME (output_bfd))); |
| 8855 | dyn.d_un.d_ptr = s->vma; |
| 8856 | break; |
| 8857 | |
| 8858 | default: |
| 8859 | swap_out_p = false; |
| 8860 | break; |
| 8861 | } |
| 8862 | |
| 8863 | if (swap_out_p) |
| 8864 | (*get_elf_backend_data (dynobj)->s->swap_dyn_out) |
| 8865 | (dynobj, &dyn, b); |
| 8866 | } |
| 8867 | } |
| 8868 | |
| 8869 | /* The first entry of the global offset table will be filled at |
| 8870 | runtime. The second entry will be used by some runtime loaders. |
| 8871 | This isn't the case of Irix rld. */ |
| 8872 | if (sgot != NULL && sgot->_raw_size > 0) |
| 8873 | { |
| 8874 | MIPS_ELF_PUT_WORD (output_bfd, (bfd_vma) 0, sgot->contents); |
| 8875 | MIPS_ELF_PUT_WORD (output_bfd, (bfd_vma) 0x80000000, |
| 8876 | sgot->contents + MIPS_ELF_GOT_SIZE (output_bfd)); |
| 8877 | } |
| 8878 | |
| 8879 | if (sgot != NULL) |
| 8880 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize |
| 8881 | = MIPS_ELF_GOT_SIZE (output_bfd); |
| 8882 | |
| 8883 | { |
| 8884 | asection *smsym; |
| 8885 | asection *s; |
| 8886 | Elf32_compact_rel cpt; |
| 8887 | |
| 8888 | /* ??? The section symbols for the output sections were set up in |
| 8889 | _bfd_elf_final_link. SGI sets the STT_NOTYPE attribute for these |
| 8890 | symbols. Should we do so? */ |
| 8891 | |
| 8892 | smsym = bfd_get_section_by_name (dynobj, |
| 8893 | MIPS_ELF_MSYM_SECTION_NAME (dynobj)); |
| 8894 | if (smsym != NULL) |
| 8895 | { |
| 8896 | Elf32_Internal_Msym msym; |
| 8897 | |
| 8898 | msym.ms_hash_value = 0; |
| 8899 | msym.ms_info = ELF32_MS_INFO (0, 1); |
| 8900 | |
| 8901 | for (s = output_bfd->sections; s != NULL; s = s->next) |
| 8902 | { |
| 8903 | long dynindx = elf_section_data (s)->dynindx; |
| 8904 | |
| 8905 | bfd_mips_elf_swap_msym_out |
| 8906 | (output_bfd, &msym, |
| 8907 | (((Elf32_External_Msym *) smsym->contents) |
| 8908 | + dynindx)); |
| 8909 | } |
| 8910 | } |
| 8911 | |
| 8912 | if (SGI_COMPAT (output_bfd)) |
| 8913 | { |
| 8914 | /* Write .compact_rel section out. */ |
| 8915 | s = bfd_get_section_by_name (dynobj, ".compact_rel"); |
| 8916 | if (s != NULL) |
| 8917 | { |
| 8918 | cpt.id1 = 1; |
| 8919 | cpt.num = s->reloc_count; |
| 8920 | cpt.id2 = 2; |
| 8921 | cpt.offset = (s->output_section->filepos |
| 8922 | + sizeof (Elf32_External_compact_rel)); |
| 8923 | cpt.reserved0 = 0; |
| 8924 | cpt.reserved1 = 0; |
| 8925 | bfd_elf32_swap_compact_rel_out (output_bfd, &cpt, |
| 8926 | ((Elf32_External_compact_rel *) |
| 8927 | s->contents)); |
| 8928 | |
| 8929 | /* Clean up a dummy stub function entry in .text. */ |
| 8930 | s = bfd_get_section_by_name (dynobj, |
| 8931 | MIPS_ELF_STUB_SECTION_NAME (dynobj)); |
| 8932 | if (s != NULL) |
| 8933 | { |
| 8934 | file_ptr dummy_offset; |
| 8935 | |
| 8936 | BFD_ASSERT (s->_raw_size >= MIPS_FUNCTION_STUB_SIZE); |
| 8937 | dummy_offset = s->_raw_size - MIPS_FUNCTION_STUB_SIZE; |
| 8938 | memset (s->contents + dummy_offset, 0, |
| 8939 | MIPS_FUNCTION_STUB_SIZE); |
| 8940 | } |
| 8941 | } |
| 8942 | } |
| 8943 | |
| 8944 | /* We need to sort the entries of the dynamic relocation section. */ |
| 8945 | |
| 8946 | if (!ABI_64_P (output_bfd)) |
| 8947 | { |
| 8948 | asection *reldyn; |
| 8949 | |
| 8950 | reldyn = bfd_get_section_by_name (dynobj, |
| 8951 | MIPS_ELF_REL_DYN_SECTION_NAME (dynobj)); |
| 8952 | if (reldyn != NULL && reldyn->reloc_count > 2) |
| 8953 | { |
| 8954 | reldyn_sorting_bfd = output_bfd; |
| 8955 | qsort ((Elf32_External_Rel *) reldyn->contents + 1, |
| 8956 | (size_t) reldyn->reloc_count - 1, |
| 8957 | sizeof (Elf32_External_Rel), sort_dynamic_relocs); |
| 8958 | } |
| 8959 | } |
| 8960 | |
| 8961 | /* Clean up a first relocation in .rel.dyn. */ |
| 8962 | s = bfd_get_section_by_name (dynobj, |
| 8963 | MIPS_ELF_REL_DYN_SECTION_NAME (dynobj)); |
| 8964 | if (s != NULL && s->_raw_size > 0) |
| 8965 | memset (s->contents, 0, MIPS_ELF_REL_SIZE (dynobj)); |
| 8966 | } |
| 8967 | |
| 8968 | return true; |
| 8969 | } |
| 8970 | \f |
| 8971 | /* This is almost identical to bfd_generic_get_... except that some |
| 8972 | MIPS relocations need to be handled specially. Sigh. */ |
| 8973 | |
| 8974 | static bfd_byte * |
| 8975 | elf32_mips_get_relocated_section_contents (abfd, link_info, link_order, data, |
| 8976 | relocateable, symbols) |
| 8977 | bfd *abfd; |
| 8978 | struct bfd_link_info *link_info; |
| 8979 | struct bfd_link_order *link_order; |
| 8980 | bfd_byte *data; |
| 8981 | boolean relocateable; |
| 8982 | asymbol **symbols; |
| 8983 | { |
| 8984 | /* Get enough memory to hold the stuff */ |
| 8985 | bfd *input_bfd = link_order->u.indirect.section->owner; |
| 8986 | asection *input_section = link_order->u.indirect.section; |
| 8987 | |
| 8988 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); |
| 8989 | arelent **reloc_vector = NULL; |
| 8990 | long reloc_count; |
| 8991 | |
| 8992 | if (reloc_size < 0) |
| 8993 | goto error_return; |
| 8994 | |
| 8995 | reloc_vector = (arelent **) bfd_malloc (reloc_size); |
| 8996 | if (reloc_vector == NULL && reloc_size != 0) |
| 8997 | goto error_return; |
| 8998 | |
| 8999 | /* read in the section */ |
| 9000 | if (!bfd_get_section_contents (input_bfd, |
| 9001 | input_section, |
| 9002 | (PTR) data, |
| 9003 | 0, |
| 9004 | input_section->_raw_size)) |
| 9005 | goto error_return; |
| 9006 | |
| 9007 | /* We're not relaxing the section, so just copy the size info */ |
| 9008 | input_section->_cooked_size = input_section->_raw_size; |
| 9009 | input_section->reloc_done = true; |
| 9010 | |
| 9011 | reloc_count = bfd_canonicalize_reloc (input_bfd, |
| 9012 | input_section, |
| 9013 | reloc_vector, |
| 9014 | symbols); |
| 9015 | if (reloc_count < 0) |
| 9016 | goto error_return; |
| 9017 | |
| 9018 | if (reloc_count > 0) |
| 9019 | { |
| 9020 | arelent **parent; |
| 9021 | /* for mips */ |
| 9022 | int gp_found; |
| 9023 | bfd_vma gp = 0x12345678; /* initialize just to shut gcc up */ |
| 9024 | |
| 9025 | { |
| 9026 | struct bfd_hash_entry *h; |
| 9027 | struct bfd_link_hash_entry *lh; |
| 9028 | /* Skip all this stuff if we aren't mixing formats. */ |
| 9029 | if (abfd && input_bfd |
| 9030 | && abfd->xvec == input_bfd->xvec) |
| 9031 | lh = 0; |
| 9032 | else |
| 9033 | { |
| 9034 | h = bfd_hash_lookup (&link_info->hash->table, "_gp", false, false); |
| 9035 | lh = (struct bfd_link_hash_entry *) h; |
| 9036 | } |
| 9037 | lookup: |
| 9038 | if (lh) |
| 9039 | { |
| 9040 | switch (lh->type) |
| 9041 | { |
| 9042 | case bfd_link_hash_undefined: |
| 9043 | case bfd_link_hash_undefweak: |
| 9044 | case bfd_link_hash_common: |
| 9045 | gp_found = 0; |
| 9046 | break; |
| 9047 | case bfd_link_hash_defined: |
| 9048 | case bfd_link_hash_defweak: |
| 9049 | gp_found = 1; |
| 9050 | gp = lh->u.def.value; |
| 9051 | break; |
| 9052 | case bfd_link_hash_indirect: |
| 9053 | case bfd_link_hash_warning: |
| 9054 | lh = lh->u.i.link; |
| 9055 | /* @@FIXME ignoring warning for now */ |
| 9056 | goto lookup; |
| 9057 | case bfd_link_hash_new: |
| 9058 | default: |
| 9059 | abort (); |
| 9060 | } |
| 9061 | } |
| 9062 | else |
| 9063 | gp_found = 0; |
| 9064 | } |
| 9065 | /* end mips */ |
| 9066 | for (parent = reloc_vector; *parent != (arelent *) NULL; |
| 9067 | parent++) |
| 9068 | { |
| 9069 | char *error_message = (char *) NULL; |
| 9070 | bfd_reloc_status_type r; |
| 9071 | |
| 9072 | /* Specific to MIPS: Deal with relocation types that require |
| 9073 | knowing the gp of the output bfd. */ |
| 9074 | asymbol *sym = *(*parent)->sym_ptr_ptr; |
| 9075 | if (bfd_is_abs_section (sym->section) && abfd) |
| 9076 | { |
| 9077 | /* The special_function wouldn't get called anyways. */ |
| 9078 | } |
| 9079 | else if (!gp_found) |
| 9080 | { |
| 9081 | /* The gp isn't there; let the special function code |
| 9082 | fall over on its own. */ |
| 9083 | } |
| 9084 | else if ((*parent)->howto->special_function |
| 9085 | == _bfd_mips_elf_gprel16_reloc) |
| 9086 | { |
| 9087 | /* bypass special_function call */ |
| 9088 | r = gprel16_with_gp (input_bfd, sym, *parent, input_section, |
| 9089 | relocateable, (PTR) data, gp); |
| 9090 | goto skip_bfd_perform_relocation; |
| 9091 | } |
| 9092 | /* end mips specific stuff */ |
| 9093 | |
| 9094 | r = bfd_perform_relocation (input_bfd, |
| 9095 | *parent, |
| 9096 | (PTR) data, |
| 9097 | input_section, |
| 9098 | relocateable ? abfd : (bfd *) NULL, |
| 9099 | &error_message); |
| 9100 | skip_bfd_perform_relocation: |
| 9101 | |
| 9102 | if (relocateable) |
| 9103 | { |
| 9104 | asection *os = input_section->output_section; |
| 9105 | |
| 9106 | /* A partial link, so keep the relocs */ |
| 9107 | os->orelocation[os->reloc_count] = *parent; |
| 9108 | os->reloc_count++; |
| 9109 | } |
| 9110 | |
| 9111 | if (r != bfd_reloc_ok) |
| 9112 | { |
| 9113 | switch (r) |
| 9114 | { |
| 9115 | case bfd_reloc_undefined: |
| 9116 | if (!((*link_info->callbacks->undefined_symbol) |
| 9117 | (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), |
| 9118 | input_bfd, input_section, (*parent)->address, |
| 9119 | true))) |
| 9120 | goto error_return; |
| 9121 | break; |
| 9122 | case bfd_reloc_dangerous: |
| 9123 | BFD_ASSERT (error_message != (char *) NULL); |
| 9124 | if (!((*link_info->callbacks->reloc_dangerous) |
| 9125 | (link_info, error_message, input_bfd, input_section, |
| 9126 | (*parent)->address))) |
| 9127 | goto error_return; |
| 9128 | break; |
| 9129 | case bfd_reloc_overflow: |
| 9130 | if (!((*link_info->callbacks->reloc_overflow) |
| 9131 | (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), |
| 9132 | (*parent)->howto->name, (*parent)->addend, |
| 9133 | input_bfd, input_section, (*parent)->address))) |
| 9134 | goto error_return; |
| 9135 | break; |
| 9136 | case bfd_reloc_outofrange: |
| 9137 | default: |
| 9138 | abort (); |
| 9139 | break; |
| 9140 | } |
| 9141 | |
| 9142 | } |
| 9143 | } |
| 9144 | } |
| 9145 | if (reloc_vector != NULL) |
| 9146 | free (reloc_vector); |
| 9147 | return data; |
| 9148 | |
| 9149 | error_return: |
| 9150 | if (reloc_vector != NULL) |
| 9151 | free (reloc_vector); |
| 9152 | return NULL; |
| 9153 | } |
| 9154 | #define bfd_elf32_bfd_get_relocated_section_contents \ |
| 9155 | elf32_mips_get_relocated_section_contents |
| 9156 | \f |
| 9157 | /* ECOFF swapping routines. These are used when dealing with the |
| 9158 | .mdebug section, which is in the ECOFF debugging format. */ |
| 9159 | static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = |
| 9160 | { |
| 9161 | /* Symbol table magic number. */ |
| 9162 | magicSym, |
| 9163 | /* Alignment of debugging information. E.g., 4. */ |
| 9164 | 4, |
| 9165 | /* Sizes of external symbolic information. */ |
| 9166 | sizeof (struct hdr_ext), |
| 9167 | sizeof (struct dnr_ext), |
| 9168 | sizeof (struct pdr_ext), |
| 9169 | sizeof (struct sym_ext), |
| 9170 | sizeof (struct opt_ext), |
| 9171 | sizeof (struct fdr_ext), |
| 9172 | sizeof (struct rfd_ext), |
| 9173 | sizeof (struct ext_ext), |
| 9174 | /* Functions to swap in external symbolic data. */ |
| 9175 | ecoff_swap_hdr_in, |
| 9176 | ecoff_swap_dnr_in, |
| 9177 | ecoff_swap_pdr_in, |
| 9178 | ecoff_swap_sym_in, |
| 9179 | ecoff_swap_opt_in, |
| 9180 | ecoff_swap_fdr_in, |
| 9181 | ecoff_swap_rfd_in, |
| 9182 | ecoff_swap_ext_in, |
| 9183 | _bfd_ecoff_swap_tir_in, |
| 9184 | _bfd_ecoff_swap_rndx_in, |
| 9185 | /* Functions to swap out external symbolic data. */ |
| 9186 | ecoff_swap_hdr_out, |
| 9187 | ecoff_swap_dnr_out, |
| 9188 | ecoff_swap_pdr_out, |
| 9189 | ecoff_swap_sym_out, |
| 9190 | ecoff_swap_opt_out, |
| 9191 | ecoff_swap_fdr_out, |
| 9192 | ecoff_swap_rfd_out, |
| 9193 | ecoff_swap_ext_out, |
| 9194 | _bfd_ecoff_swap_tir_out, |
| 9195 | _bfd_ecoff_swap_rndx_out, |
| 9196 | /* Function to read in symbolic data. */ |
| 9197 | _bfd_mips_elf_read_ecoff_info |
| 9198 | }; |
| 9199 | \f |
| 9200 | #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec |
| 9201 | #define TARGET_LITTLE_NAME "elf32-littlemips" |
| 9202 | #define TARGET_BIG_SYM bfd_elf32_bigmips_vec |
| 9203 | #define TARGET_BIG_NAME "elf32-bigmips" |
| 9204 | #define ELF_ARCH bfd_arch_mips |
| 9205 | #define ELF_MACHINE_CODE EM_MIPS |
| 9206 | |
| 9207 | /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses |
| 9208 | a value of 0x1000, and we are compatible. */ |
| 9209 | #define ELF_MAXPAGESIZE 0x1000 |
| 9210 | |
| 9211 | #define elf_backend_collect true |
| 9212 | #define elf_backend_type_change_ok true |
| 9213 | #define elf_backend_can_gc_sections true |
| 9214 | #define elf_backend_sign_extend_vma true |
| 9215 | #define elf_info_to_howto mips_info_to_howto_rela |
| 9216 | #define elf_info_to_howto_rel mips_info_to_howto_rel |
| 9217 | #define elf_backend_sym_is_global mips_elf_sym_is_global |
| 9218 | #define elf_backend_object_p _bfd_mips_elf_object_p |
| 9219 | #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr |
| 9220 | #define elf_backend_fake_sections _bfd_mips_elf_fake_sections |
| 9221 | #define elf_backend_section_from_bfd_section \ |
| 9222 | _bfd_mips_elf_section_from_bfd_section |
| 9223 | #define elf_backend_section_processing _bfd_mips_elf_section_processing |
| 9224 | #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing |
| 9225 | #define elf_backend_additional_program_headers \ |
| 9226 | _bfd_mips_elf_additional_program_headers |
| 9227 | #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map |
| 9228 | #define elf_backend_final_write_processing \ |
| 9229 | _bfd_mips_elf_final_write_processing |
| 9230 | #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap |
| 9231 | #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook |
| 9232 | #define elf_backend_create_dynamic_sections \ |
| 9233 | _bfd_mips_elf_create_dynamic_sections |
| 9234 | #define elf_backend_check_relocs _bfd_mips_elf_check_relocs |
| 9235 | #define elf_backend_adjust_dynamic_symbol \ |
| 9236 | _bfd_mips_elf_adjust_dynamic_symbol |
| 9237 | #define elf_backend_always_size_sections \ |
| 9238 | _bfd_mips_elf_always_size_sections |
| 9239 | #define elf_backend_size_dynamic_sections \ |
| 9240 | _bfd_mips_elf_size_dynamic_sections |
| 9241 | #define elf_backend_relocate_section _bfd_mips_elf_relocate_section |
| 9242 | #define elf_backend_link_output_symbol_hook \ |
| 9243 | _bfd_mips_elf_link_output_symbol_hook |
| 9244 | #define elf_backend_finish_dynamic_symbol \ |
| 9245 | _bfd_mips_elf_finish_dynamic_symbol |
| 9246 | #define elf_backend_finish_dynamic_sections \ |
| 9247 | _bfd_mips_elf_finish_dynamic_sections |
| 9248 | #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook |
| 9249 | #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook |
| 9250 | |
| 9251 | #define elf_backend_got_header_size (4*MIPS_RESERVED_GOTNO) |
| 9252 | #define elf_backend_plt_header_size 0 |
| 9253 | |
| 9254 | #define elf_backend_copy_indirect_symbol \ |
| 9255 | _bfd_mips_elf_copy_indirect_symbol |
| 9256 | |
| 9257 | #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol |
| 9258 | |
| 9259 | #define bfd_elf32_bfd_is_local_label_name \ |
| 9260 | mips_elf_is_local_label_name |
| 9261 | #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line |
| 9262 | #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents |
| 9263 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 9264 | _bfd_mips_elf_link_hash_table_create |
| 9265 | #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link |
| 9266 | #define bfd_elf32_bfd_copy_private_bfd_data \ |
| 9267 | _bfd_mips_elf_copy_private_bfd_data |
| 9268 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 9269 | _bfd_mips_elf_merge_private_bfd_data |
| 9270 | #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags |
| 9271 | #define bfd_elf32_bfd_print_private_bfd_data \ |
| 9272 | _bfd_mips_elf_print_private_bfd_data |
| 9273 | #include "elf32-target.h" |
| 9274 | |
| 9275 | /* Support for traditional mips targets */ |
| 9276 | |
| 9277 | #define INCLUDED_TARGET_FILE /* More a type of flag */ |
| 9278 | |
| 9279 | #undef TARGET_LITTLE_SYM |
| 9280 | #undef TARGET_LITTLE_NAME |
| 9281 | #undef TARGET_BIG_SYM |
| 9282 | #undef TARGET_BIG_NAME |
| 9283 | |
| 9284 | #define TARGET_LITTLE_SYM bfd_elf32_tradlittlemips_vec |
| 9285 | #define TARGET_LITTLE_NAME "elf32-tradlittlemips" |
| 9286 | #define TARGET_BIG_SYM bfd_elf32_tradbigmips_vec |
| 9287 | #define TARGET_BIG_NAME "elf32-tradbigmips" |
| 9288 | |
| 9289 | /* Include the target file again for this target */ |
| 9290 | #include "elf32-target.h" |