| 1 | /* MIPS-specific support for 32-bit ELF |
| 2 | Copyright 1993, 1994, 1995 Free Software Foundation, Inc. |
| 3 | |
| 4 | Most of the information added by Ian Lance Taylor, Cygnus Support, |
| 5 | <ian@cygnus.com>. |
| 6 | |
| 7 | This file is part of BFD, the Binary File Descriptor library. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 22 | |
| 23 | #include "bfd.h" |
| 24 | #include "sysdep.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "bfdlink.h" |
| 27 | #include "genlink.h" |
| 28 | #include "libelf.h" |
| 29 | #include "elf/mips.h" |
| 30 | |
| 31 | /* Get the ECOFF swapping routines. */ |
| 32 | #include "coff/sym.h" |
| 33 | #include "coff/symconst.h" |
| 34 | #include "coff/internal.h" |
| 35 | #include "coff/ecoff.h" |
| 36 | #include "coff/mips.h" |
| 37 | #define ECOFF_32 |
| 38 | #include "ecoffswap.h" |
| 39 | |
| 40 | static bfd_reloc_status_type mips_elf_hi16_reloc PARAMS ((bfd *abfd, |
| 41 | arelent *reloc, |
| 42 | asymbol *symbol, |
| 43 | PTR data, |
| 44 | asection *section, |
| 45 | bfd *output_bfd, |
| 46 | char **error)); |
| 47 | static bfd_reloc_status_type mips_elf_got16_reloc PARAMS ((bfd *abfd, |
| 48 | arelent *reloc, |
| 49 | asymbol *symbol, |
| 50 | PTR data, |
| 51 | asection *section, |
| 52 | bfd *output_bfd, |
| 53 | char **error)); |
| 54 | static bfd_reloc_status_type mips_elf_lo16_reloc PARAMS ((bfd *abfd, |
| 55 | arelent *reloc, |
| 56 | asymbol *symbol, |
| 57 | PTR data, |
| 58 | asection *section, |
| 59 | bfd *output_bfd, |
| 60 | char **error)); |
| 61 | static bfd_reloc_status_type mips_elf_gprel16_reloc PARAMS ((bfd *abfd, |
| 62 | arelent *reloc, |
| 63 | asymbol *symbol, |
| 64 | PTR data, |
| 65 | asection *section, |
| 66 | bfd *output_bfd, |
| 67 | char **error)); |
| 68 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
| 69 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 70 | static void mips_info_to_howto_rel |
| 71 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); |
| 72 | static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *)); |
| 73 | static boolean mips_elf_object_p PARAMS ((bfd *)); |
| 74 | static void mips_elf_final_write_processing |
| 75 | PARAMS ((bfd *, boolean)); |
| 76 | static boolean mips_elf_section_from_shdr |
| 77 | PARAMS ((bfd *, Elf32_Internal_Shdr *, char *)); |
| 78 | static boolean mips_elf_fake_sections |
| 79 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); |
| 80 | static boolean mips_elf_section_from_bfd_section |
| 81 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *)); |
| 82 | static boolean mips_elf_section_processing |
| 83 | PARAMS ((bfd *, Elf32_Internal_Shdr *)); |
| 84 | static void mips_elf_symbol_processing PARAMS ((bfd *, asymbol *)); |
| 85 | static boolean mips_elf_read_ecoff_info |
| 86 | PARAMS ((bfd *, asection *, struct ecoff_debug_info *)); |
| 87 | static boolean mips_elf_is_local_label |
| 88 | PARAMS ((bfd *, asymbol *)); |
| 89 | static boolean mips_elf_find_nearest_line |
| 90 | PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **, |
| 91 | const char **, unsigned int *)); |
| 92 | static struct bfd_hash_entry *mips_elf_link_hash_newfunc |
| 93 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 94 | static struct bfd_link_hash_table *mips_elf_link_hash_table_create |
| 95 | PARAMS ((bfd *)); |
| 96 | static int gptab_compare PARAMS ((const void *, const void *)); |
| 97 | static boolean mips_elf_final_link |
| 98 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 99 | static void mips_elf_relocate_hi16 |
| 100 | PARAMS ((bfd *, Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_byte *, |
| 101 | bfd_vma)); |
| 102 | static boolean mips_elf_relocate_section |
| 103 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 104 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 105 | static boolean mips_elf_add_symbol_hook |
| 106 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, |
| 107 | const char **, flagword *, asection **, bfd_vma *)); |
| 108 | |
| 109 | #define USE_REL 1 /* MIPS uses REL relocations instead of RELA */ |
| 110 | |
| 111 | enum reloc_type |
| 112 | { |
| 113 | R_MIPS_NONE = 0, |
| 114 | R_MIPS_16, R_MIPS_32, |
| 115 | R_MIPS_REL32, R_MIPS_26, |
| 116 | R_MIPS_HI16, R_MIPS_LO16, |
| 117 | R_MIPS_GPREL16, R_MIPS_LITERAL, |
| 118 | R_MIPS_GOT16, R_MIPS_PC16, |
| 119 | R_MIPS_CALL16, R_MIPS_GPREL32, |
| 120 | /* The remaining relocs are defined on Irix, although they are not |
| 121 | in the MIPS ELF ABI. */ |
| 122 | R_MIPS_UNUSED1, R_MIPS_UNUSED2, |
| 123 | R_MIPS_UNUSED3, |
| 124 | R_MIPS_SHIFT5, R_MIPS_SHIFT6, |
| 125 | R_MIPS_64, R_MIPS_GOT_DISP, |
| 126 | R_MIPS_GOT_PAGE, R_MIPS_GOT_OFST, |
| 127 | R_MIPS_GOT_HI16, R_MIPS_GOT_LO16, |
| 128 | R_MIPS_SUB, R_MIPS_INSERT_A, |
| 129 | R_MIPS_INSERT_B, R_MIPS_DELETE, |
| 130 | R_MIPS_HIGHER, R_MIPS_HIGHEST, |
| 131 | R_MIPS_CALL_HI16, R_MIPS_CALL_LO16, |
| 132 | R_MIPS_max |
| 133 | }; |
| 134 | |
| 135 | static reloc_howto_type elf_mips_howto_table[] = |
| 136 | { |
| 137 | /* No relocation. */ |
| 138 | HOWTO (R_MIPS_NONE, /* type */ |
| 139 | 0, /* rightshift */ |
| 140 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 141 | 0, /* bitsize */ |
| 142 | false, /* pc_relative */ |
| 143 | 0, /* bitpos */ |
| 144 | complain_overflow_dont, /* complain_on_overflow */ |
| 145 | bfd_elf_generic_reloc, /* special_function */ |
| 146 | "R_MIPS_NONE", /* name */ |
| 147 | false, /* partial_inplace */ |
| 148 | 0, /* src_mask */ |
| 149 | 0, /* dst_mask */ |
| 150 | false), /* pcrel_offset */ |
| 151 | |
| 152 | /* 16 bit relocation. */ |
| 153 | HOWTO (R_MIPS_16, /* type */ |
| 154 | 0, /* rightshift */ |
| 155 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 156 | 16, /* bitsize */ |
| 157 | false, /* pc_relative */ |
| 158 | 0, /* bitpos */ |
| 159 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 160 | bfd_elf_generic_reloc, /* special_function */ |
| 161 | "R_MIPS_16", /* name */ |
| 162 | true, /* partial_inplace */ |
| 163 | 0xffff, /* src_mask */ |
| 164 | 0xffff, /* dst_mask */ |
| 165 | false), /* pcrel_offset */ |
| 166 | |
| 167 | /* 32 bit relocation. */ |
| 168 | HOWTO (R_MIPS_32, /* type */ |
| 169 | 0, /* rightshift */ |
| 170 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 171 | 32, /* bitsize */ |
| 172 | false, /* pc_relative */ |
| 173 | 0, /* bitpos */ |
| 174 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 175 | bfd_elf_generic_reloc, /* special_function */ |
| 176 | "R_MIPS_32", /* name */ |
| 177 | true, /* partial_inplace */ |
| 178 | 0xffffffff, /* src_mask */ |
| 179 | 0xffffffff, /* dst_mask */ |
| 180 | false), /* pcrel_offset */ |
| 181 | |
| 182 | /* 32 bit symbol relative relocation. */ |
| 183 | HOWTO (R_MIPS_REL32, /* type */ |
| 184 | 0, /* rightshift */ |
| 185 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 186 | 32, /* bitsize */ |
| 187 | false, /* pc_relative */ |
| 188 | 0, /* bitpos */ |
| 189 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 190 | bfd_elf_generic_reloc, /* special_function */ |
| 191 | "R_MIPS_REL32", /* name */ |
| 192 | true, /* partial_inplace */ |
| 193 | 0xffffffff, /* src_mask */ |
| 194 | 0xffffffff, /* dst_mask */ |
| 195 | false), /* pcrel_offset */ |
| 196 | |
| 197 | /* 26 bit branch address. */ |
| 198 | HOWTO (R_MIPS_26, /* type */ |
| 199 | 2, /* rightshift */ |
| 200 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 201 | 26, /* bitsize */ |
| 202 | false, /* pc_relative */ |
| 203 | 0, /* bitpos */ |
| 204 | complain_overflow_dont, /* complain_on_overflow */ |
| 205 | /* This needs complex overflow |
| 206 | detection, because the upper four |
| 207 | bits must match the PC. */ |
| 208 | bfd_elf_generic_reloc, /* special_function */ |
| 209 | "R_MIPS_26", /* name */ |
| 210 | true, /* partial_inplace */ |
| 211 | 0x3ffffff, /* src_mask */ |
| 212 | 0x3ffffff, /* dst_mask */ |
| 213 | false), /* pcrel_offset */ |
| 214 | |
| 215 | /* High 16 bits of symbol value. */ |
| 216 | HOWTO (R_MIPS_HI16, /* type */ |
| 217 | 0, /* rightshift */ |
| 218 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 219 | 16, /* bitsize */ |
| 220 | false, /* pc_relative */ |
| 221 | 0, /* bitpos */ |
| 222 | complain_overflow_dont, /* complain_on_overflow */ |
| 223 | mips_elf_hi16_reloc, /* special_function */ |
| 224 | "R_MIPS_HI16", /* name */ |
| 225 | true, /* partial_inplace */ |
| 226 | 0xffff, /* src_mask */ |
| 227 | 0xffff, /* dst_mask */ |
| 228 | false), /* pcrel_offset */ |
| 229 | |
| 230 | /* Low 16 bits of symbol value. */ |
| 231 | HOWTO (R_MIPS_LO16, /* type */ |
| 232 | 0, /* rightshift */ |
| 233 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 234 | 16, /* bitsize */ |
| 235 | false, /* pc_relative */ |
| 236 | 0, /* bitpos */ |
| 237 | complain_overflow_dont, /* complain_on_overflow */ |
| 238 | mips_elf_lo16_reloc, /* special_function */ |
| 239 | "R_MIPS_LO16", /* name */ |
| 240 | true, /* partial_inplace */ |
| 241 | 0xffff, /* src_mask */ |
| 242 | 0xffff, /* dst_mask */ |
| 243 | false), /* pcrel_offset */ |
| 244 | |
| 245 | /* GP relative reference. */ |
| 246 | HOWTO (R_MIPS_GPREL16, /* type */ |
| 247 | 0, /* rightshift */ |
| 248 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 249 | 16, /* bitsize */ |
| 250 | false, /* pc_relative */ |
| 251 | 0, /* bitpos */ |
| 252 | complain_overflow_signed, /* complain_on_overflow */ |
| 253 | mips_elf_gprel16_reloc, /* special_function */ |
| 254 | "R_MIPS_GPREL16", /* name */ |
| 255 | true, /* partial_inplace */ |
| 256 | 0xffff, /* src_mask */ |
| 257 | 0xffff, /* dst_mask */ |
| 258 | false), /* pcrel_offset */ |
| 259 | |
| 260 | /* Reference to literal section. */ |
| 261 | HOWTO (R_MIPS_LITERAL, /* type */ |
| 262 | 0, /* rightshift */ |
| 263 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 264 | 16, /* bitsize */ |
| 265 | false, /* pc_relative */ |
| 266 | 0, /* bitpos */ |
| 267 | complain_overflow_signed, /* complain_on_overflow */ |
| 268 | mips_elf_gprel16_reloc, /* special_function */ |
| 269 | "R_MIPS_LITERAL", /* name */ |
| 270 | true, /* partial_inplace */ |
| 271 | 0xffff, /* src_mask */ |
| 272 | 0xffff, /* dst_mask */ |
| 273 | false), /* pcrel_offset */ |
| 274 | |
| 275 | /* Reference to global offset table. */ |
| 276 | /* FIXME: This is not handled correctly. */ |
| 277 | HOWTO (R_MIPS_GOT16, /* type */ |
| 278 | 0, /* rightshift */ |
| 279 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 280 | 16, /* bitsize */ |
| 281 | false, /* pc_relative */ |
| 282 | 0, /* bitpos */ |
| 283 | complain_overflow_signed, /* complain_on_overflow */ |
| 284 | mips_elf_got16_reloc, /* special_function */ |
| 285 | "R_MIPS_GOT16", /* name */ |
| 286 | false, /* partial_inplace */ |
| 287 | 0, /* src_mask */ |
| 288 | 0xffff, /* dst_mask */ |
| 289 | false), /* pcrel_offset */ |
| 290 | |
| 291 | /* 16 bit PC relative reference. */ |
| 292 | HOWTO (R_MIPS_PC16, /* type */ |
| 293 | 0, /* rightshift */ |
| 294 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 295 | 16, /* bitsize */ |
| 296 | true, /* pc_relative */ |
| 297 | 0, /* bitpos */ |
| 298 | complain_overflow_signed, /* complain_on_overflow */ |
| 299 | bfd_elf_generic_reloc, /* special_function */ |
| 300 | "R_MIPS_PC16", /* name */ |
| 301 | true, /* partial_inplace */ |
| 302 | 0xffff, /* src_mask */ |
| 303 | 0xffff, /* dst_mask */ |
| 304 | false), /* pcrel_offset */ |
| 305 | |
| 306 | /* 16 bit call through global offset table. */ |
| 307 | /* FIXME: This is not handled correctly. */ |
| 308 | HOWTO (R_MIPS_CALL16, /* type */ |
| 309 | 0, /* rightshift */ |
| 310 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 311 | 16, /* bitsize */ |
| 312 | false, /* pc_relative */ |
| 313 | 0, /* bitpos */ |
| 314 | complain_overflow_signed, /* complain_on_overflow */ |
| 315 | bfd_elf_generic_reloc, /* special_function */ |
| 316 | "R_MIPS_CALL16", /* name */ |
| 317 | false, /* partial_inplace */ |
| 318 | 0, /* src_mask */ |
| 319 | 0xffff, /* dst_mask */ |
| 320 | false), /* pcrel_offset */ |
| 321 | |
| 322 | /* 32 bit GP relative reference. */ |
| 323 | /* FIXME: This is not handled correctly. */ |
| 324 | HOWTO (R_MIPS_GPREL32, /* type */ |
| 325 | 0, /* rightshift */ |
| 326 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 327 | 32, /* bitsize */ |
| 328 | false, /* pc_relative */ |
| 329 | 0, /* bitpos */ |
| 330 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 331 | bfd_elf_generic_reloc, /* special_function */ |
| 332 | "R_MIPS_GPREL32", /* name */ |
| 333 | true, /* partial_inplace */ |
| 334 | 0xffffffff, /* src_mask */ |
| 335 | 0xffffffff, /* dst_mask */ |
| 336 | false), /* pcrel_offset */ |
| 337 | |
| 338 | /* The remaining relocs are defined on Irix 5, although they are |
| 339 | not defined by the ABI. */ |
| 340 | { 13 }, |
| 341 | { 14 }, |
| 342 | { 15 }, |
| 343 | |
| 344 | /* A 5 bit shift field. */ |
| 345 | HOWTO (R_MIPS_SHIFT5, /* type */ |
| 346 | 0, /* rightshift */ |
| 347 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 348 | 5, /* bitsize */ |
| 349 | false, /* pc_relative */ |
| 350 | 6, /* bitpos */ |
| 351 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 352 | bfd_elf_generic_reloc, /* special_function */ |
| 353 | "R_MIPS_SHIFT5", /* name */ |
| 354 | true, /* partial_inplace */ |
| 355 | 0x000007c0, /* src_mask */ |
| 356 | 0x000007c0, /* dst_mask */ |
| 357 | false), /* pcrel_offset */ |
| 358 | |
| 359 | /* A 6 bit shift field. */ |
| 360 | /* FIXME: This is not handled correctly; a special function is |
| 361 | needed to put the most significant bit in the right place. */ |
| 362 | HOWTO (R_MIPS_SHIFT6, /* type */ |
| 363 | 0, /* rightshift */ |
| 364 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 365 | 6, /* bitsize */ |
| 366 | false, /* pc_relative */ |
| 367 | 6, /* bitpos */ |
| 368 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 369 | bfd_elf_generic_reloc, /* special_function */ |
| 370 | "R_MIPS_SHIFT6", /* name */ |
| 371 | true, /* partial_inplace */ |
| 372 | 0x000007c4, /* src_mask */ |
| 373 | 0x000007c4, /* dst_mask */ |
| 374 | false), /* pcrel_offset */ |
| 375 | |
| 376 | /* A 64 bit relocation. Presumably not used in 32 bit ELF. */ |
| 377 | { R_MIPS_64 }, |
| 378 | |
| 379 | /* Displacement in the global offset table. */ |
| 380 | /* FIXME: Not handled correctly. */ |
| 381 | HOWTO (R_MIPS_GOT_DISP, /* type */ |
| 382 | 0, /* rightshift */ |
| 383 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 384 | 16, /* bitsize */ |
| 385 | false, /* pc_relative */ |
| 386 | 0, /* bitpos */ |
| 387 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 388 | bfd_elf_generic_reloc, /* special_function */ |
| 389 | "R_MIPS_GOT_DISP", /* name */ |
| 390 | true, /* partial_inplace */ |
| 391 | 0x0000ffff, /* src_mask */ |
| 392 | 0x0000ffff, /* dst_mask */ |
| 393 | false), /* pcrel_offset */ |
| 394 | |
| 395 | /* Displacement to page pointer in the global offset table. */ |
| 396 | /* FIXME: Not handled correctly. */ |
| 397 | HOWTO (R_MIPS_GOT_PAGE, /* type */ |
| 398 | 0, /* rightshift */ |
| 399 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 400 | 16, /* bitsize */ |
| 401 | false, /* pc_relative */ |
| 402 | 0, /* bitpos */ |
| 403 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 404 | bfd_elf_generic_reloc, /* special_function */ |
| 405 | "R_MIPS_GOT_PAGE", /* name */ |
| 406 | true, /* partial_inplace */ |
| 407 | 0x0000ffff, /* src_mask */ |
| 408 | 0x0000ffff, /* dst_mask */ |
| 409 | false), /* pcrel_offset */ |
| 410 | |
| 411 | /* Offset from page pointer in the global offset table. */ |
| 412 | /* FIXME: Not handled correctly. */ |
| 413 | HOWTO (R_MIPS_GOT_OFST, /* type */ |
| 414 | 0, /* rightshift */ |
| 415 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 416 | 16, /* bitsize */ |
| 417 | false, /* pc_relative */ |
| 418 | 0, /* bitpos */ |
| 419 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 420 | bfd_elf_generic_reloc, /* special_function */ |
| 421 | "R_MIPS_GOT_OFST", /* name */ |
| 422 | true, /* partial_inplace */ |
| 423 | 0x0000ffff, /* src_mask */ |
| 424 | 0x0000ffff, /* dst_mask */ |
| 425 | false), /* pcrel_offset */ |
| 426 | |
| 427 | /* High 16 bits of displacement in global offset table. */ |
| 428 | /* FIXME: Not handled correctly. */ |
| 429 | HOWTO (R_MIPS_GOT_HI16, /* type */ |
| 430 | 0, /* rightshift */ |
| 431 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 432 | 16, /* bitsize */ |
| 433 | false, /* pc_relative */ |
| 434 | 0, /* bitpos */ |
| 435 | complain_overflow_dont, /* complain_on_overflow */ |
| 436 | bfd_elf_generic_reloc, /* special_function */ |
| 437 | "R_MIPS_GOT_HI16", /* name */ |
| 438 | true, /* partial_inplace */ |
| 439 | 0x0000ffff, /* src_mask */ |
| 440 | 0x0000ffff, /* dst_mask */ |
| 441 | false), /* pcrel_offset */ |
| 442 | |
| 443 | /* Low 16 bits of displacement in global offset table. */ |
| 444 | /* FIXME: Not handled correctly. */ |
| 445 | HOWTO (R_MIPS_GOT_LO16, /* type */ |
| 446 | 0, /* rightshift */ |
| 447 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 448 | 16, /* bitsize */ |
| 449 | false, /* pc_relative */ |
| 450 | 0, /* bitpos */ |
| 451 | complain_overflow_dont, /* complain_on_overflow */ |
| 452 | bfd_elf_generic_reloc, /* special_function */ |
| 453 | "R_MIPS_GOT_LO16", /* name */ |
| 454 | true, /* partial_inplace */ |
| 455 | 0x0000ffff, /* src_mask */ |
| 456 | 0x0000ffff, /* dst_mask */ |
| 457 | false), /* pcrel_offset */ |
| 458 | |
| 459 | /* 64 bit subtraction. Presumably not used in 32 bit ELF. */ |
| 460 | { R_MIPS_SUB }, |
| 461 | |
| 462 | /* Used to cause the linker to insert and delete instructions? */ |
| 463 | { R_MIPS_INSERT_A }, |
| 464 | { R_MIPS_INSERT_B }, |
| 465 | { R_MIPS_DELETE }, |
| 466 | |
| 467 | /* Get the higher values of a 64 bit addend. Presumably not used in |
| 468 | 32 bit ELF. */ |
| 469 | { R_MIPS_HIGHER }, |
| 470 | { R_MIPS_HIGHEST }, |
| 471 | |
| 472 | /* High 16 bits of displacement in global offset table. */ |
| 473 | /* FIXME: Not handled correctly. */ |
| 474 | HOWTO (R_MIPS_CALL_HI16, /* type */ |
| 475 | 0, /* rightshift */ |
| 476 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 477 | 16, /* bitsize */ |
| 478 | false, /* pc_relative */ |
| 479 | 0, /* bitpos */ |
| 480 | complain_overflow_dont, /* complain_on_overflow */ |
| 481 | bfd_elf_generic_reloc, /* special_function */ |
| 482 | "R_MIPS_CALL_HI16", /* name */ |
| 483 | true, /* partial_inplace */ |
| 484 | 0x0000ffff, /* src_mask */ |
| 485 | 0x0000ffff, /* dst_mask */ |
| 486 | false), /* pcrel_offset */ |
| 487 | |
| 488 | /* Low 16 bits of displacement in global offset table. */ |
| 489 | /* FIXME: Not handled correctly. */ |
| 490 | HOWTO (R_MIPS_CALL_LO16, /* type */ |
| 491 | 0, /* rightshift */ |
| 492 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 493 | 16, /* bitsize */ |
| 494 | false, /* pc_relative */ |
| 495 | 0, /* bitpos */ |
| 496 | complain_overflow_dont, /* complain_on_overflow */ |
| 497 | bfd_elf_generic_reloc, /* special_function */ |
| 498 | "R_MIPS_CALL_LO16", /* name */ |
| 499 | true, /* partial_inplace */ |
| 500 | 0x0000ffff, /* src_mask */ |
| 501 | 0x0000ffff, /* dst_mask */ |
| 502 | false) /* pcrel_offset */ |
| 503 | }; |
| 504 | |
| 505 | /* Do a R_MIPS_HI16 relocation. This has to be done in combination |
| 506 | with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to |
| 507 | the HI16. Here we just save the information we need; we do the |
| 508 | actual relocation when we see the LO16. MIPS ELF requires that the |
| 509 | LO16 immediately follow the HI16, so this ought to work. */ |
| 510 | |
| 511 | static bfd_byte *mips_hi16_addr; |
| 512 | static bfd_vma mips_hi16_addend; |
| 513 | |
| 514 | static bfd_reloc_status_type |
| 515 | mips_elf_hi16_reloc (abfd, |
| 516 | reloc_entry, |
| 517 | symbol, |
| 518 | data, |
| 519 | input_section, |
| 520 | output_bfd, |
| 521 | error_message) |
| 522 | bfd *abfd; |
| 523 | arelent *reloc_entry; |
| 524 | asymbol *symbol; |
| 525 | PTR data; |
| 526 | asection *input_section; |
| 527 | bfd *output_bfd; |
| 528 | char **error_message; |
| 529 | { |
| 530 | bfd_reloc_status_type ret; |
| 531 | bfd_vma relocation; |
| 532 | |
| 533 | /* If we're relocating, and this an external symbol, we don't want |
| 534 | to change anything. */ |
| 535 | if (output_bfd != (bfd *) NULL |
| 536 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 537 | && reloc_entry->addend == 0) |
| 538 | { |
| 539 | reloc_entry->address += input_section->output_offset; |
| 540 | return bfd_reloc_ok; |
| 541 | } |
| 542 | |
| 543 | /* FIXME: The symbol _gp_disp requires special handling, which we do |
| 544 | not do. */ |
| 545 | if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
| 546 | abort (); |
| 547 | |
| 548 | ret = bfd_reloc_ok; |
| 549 | if (bfd_is_und_section (symbol->section) |
| 550 | && output_bfd == (bfd *) NULL) |
| 551 | ret = bfd_reloc_undefined; |
| 552 | |
| 553 | if (bfd_is_com_section (symbol->section)) |
| 554 | relocation = 0; |
| 555 | else |
| 556 | relocation = symbol->value; |
| 557 | |
| 558 | relocation += symbol->section->output_section->vma; |
| 559 | relocation += symbol->section->output_offset; |
| 560 | relocation += reloc_entry->addend; |
| 561 | |
| 562 | if (reloc_entry->address > input_section->_cooked_size) |
| 563 | return bfd_reloc_outofrange; |
| 564 | |
| 565 | /* Save the information, and let LO16 do the actual relocation. */ |
| 566 | mips_hi16_addr = (bfd_byte *) data + reloc_entry->address; |
| 567 | mips_hi16_addend = relocation; |
| 568 | |
| 569 | if (output_bfd != (bfd *) NULL) |
| 570 | reloc_entry->address += input_section->output_offset; |
| 571 | |
| 572 | return ret; |
| 573 | } |
| 574 | |
| 575 | /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit |
| 576 | inplace relocation; this function exists in order to do the |
| 577 | R_MIPS_HI16 relocation described above. */ |
| 578 | |
| 579 | static bfd_reloc_status_type |
| 580 | mips_elf_lo16_reloc (abfd, |
| 581 | reloc_entry, |
| 582 | symbol, |
| 583 | data, |
| 584 | input_section, |
| 585 | output_bfd, |
| 586 | error_message) |
| 587 | bfd *abfd; |
| 588 | arelent *reloc_entry; |
| 589 | asymbol *symbol; |
| 590 | PTR data; |
| 591 | asection *input_section; |
| 592 | bfd *output_bfd; |
| 593 | char **error_message; |
| 594 | { |
| 595 | /* FIXME: The symbol _gp_disp requires special handling, which we do |
| 596 | not do. */ |
| 597 | if (output_bfd == (bfd *) NULL |
| 598 | && strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
| 599 | abort (); |
| 600 | |
| 601 | if (mips_hi16_addr != (bfd_byte *) NULL) |
| 602 | { |
| 603 | unsigned long insn; |
| 604 | unsigned long val; |
| 605 | unsigned long vallo; |
| 606 | |
| 607 | /* Do the HI16 relocation. Note that we actually don't need to |
| 608 | know anything about the LO16 itself, except where to find the |
| 609 | low 16 bits of the addend needed by the LO16. */ |
| 610 | insn = bfd_get_32 (abfd, mips_hi16_addr); |
| 611 | vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address) |
| 612 | & 0xffff); |
| 613 | val = ((insn & 0xffff) << 16) + vallo; |
| 614 | val += mips_hi16_addend; |
| 615 | |
| 616 | /* The low order 16 bits are always treated as a signed value. |
| 617 | Therefore, a negative value in the low order bits requires an |
| 618 | adjustment in the high order bits. We need to make this |
| 619 | adjustment in two ways: once for the bits we took from the |
| 620 | data, and once for the bits we are putting back in to the |
| 621 | data. */ |
| 622 | if ((vallo & 0x8000) != 0) |
| 623 | val -= 0x10000; |
| 624 | if ((val & 0x8000) != 0) |
| 625 | val += 0x10000; |
| 626 | |
| 627 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); |
| 628 | bfd_put_32 (abfd, insn, mips_hi16_addr); |
| 629 | |
| 630 | mips_hi16_addr = (bfd_byte *) NULL; |
| 631 | } |
| 632 | |
| 633 | /* Now do the LO16 reloc in the usual way. */ |
| 634 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 635 | input_section, output_bfd, error_message); |
| 636 | } |
| 637 | |
| 638 | /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset |
| 639 | table used for PIC code. If the symbol is an external symbol, the |
| 640 | instruction is modified to contain the offset of the appropriate |
| 641 | entry in the global offset table. If the symbol is a section |
| 642 | symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit |
| 643 | addends are combined to form the real addend against the section |
| 644 | symbol; the GOT16 is modified to contain the offset of an entry in |
| 645 | the global offset table, and the LO16 is modified to offset it |
| 646 | appropriately. Thus an offset larger than 16 bits requires a |
| 647 | modified value in the global offset table. |
| 648 | |
| 649 | This implementation suffices for the assembler, but the linker does |
| 650 | not yet know how to create global offset tables. */ |
| 651 | |
| 652 | static bfd_reloc_status_type |
| 653 | mips_elf_got16_reloc (abfd, |
| 654 | reloc_entry, |
| 655 | symbol, |
| 656 | data, |
| 657 | input_section, |
| 658 | output_bfd, |
| 659 | error_message) |
| 660 | bfd *abfd; |
| 661 | arelent *reloc_entry; |
| 662 | asymbol *symbol; |
| 663 | PTR data; |
| 664 | asection *input_section; |
| 665 | bfd *output_bfd; |
| 666 | char **error_message; |
| 667 | { |
| 668 | /* If we're relocating, and this an external symbol, we don't want |
| 669 | to change anything. */ |
| 670 | if (output_bfd != (bfd *) NULL |
| 671 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 672 | && reloc_entry->addend == 0) |
| 673 | { |
| 674 | reloc_entry->address += input_section->output_offset; |
| 675 | return bfd_reloc_ok; |
| 676 | } |
| 677 | |
| 678 | /* If we're relocating, and this is a local symbol, we can handle it |
| 679 | just like HI16. */ |
| 680 | if (output_bfd != (bfd *) NULL |
| 681 | && (symbol->flags & BSF_SECTION_SYM) != 0) |
| 682 | return mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, |
| 683 | input_section, output_bfd, error_message); |
| 684 | |
| 685 | abort (); |
| 686 | } |
| 687 | |
| 688 | /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must |
| 689 | become the offset from the gp register. This function also handles |
| 690 | R_MIPS_LITERAL relocations, although those can be handled more |
| 691 | cleverly because the entries in the .lit8 and .lit4 sections can be |
| 692 | merged. */ |
| 693 | |
| 694 | static bfd_reloc_status_type gprel16_with_gp PARAMS ((bfd *, asymbol *, |
| 695 | arelent *, asection *, |
| 696 | boolean, PTR, bfd_vma)); |
| 697 | |
| 698 | static bfd_reloc_status_type |
| 699 | mips_elf_gprel16_reloc (abfd, |
| 700 | reloc_entry, |
| 701 | symbol, |
| 702 | data, |
| 703 | input_section, |
| 704 | output_bfd, |
| 705 | error_message) |
| 706 | bfd *abfd; |
| 707 | arelent *reloc_entry; |
| 708 | asymbol *symbol; |
| 709 | PTR data; |
| 710 | asection *input_section; |
| 711 | bfd *output_bfd; |
| 712 | char **error_message; |
| 713 | { |
| 714 | boolean relocateable; |
| 715 | |
| 716 | /* If we're relocating, and this is an external symbol with no |
| 717 | addend, we don't want to change anything. We will only have an |
| 718 | addend if this is a newly created reloc, not read from an ELF |
| 719 | file. */ |
| 720 | if (output_bfd != (bfd *) NULL |
| 721 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 722 | && reloc_entry->addend == 0) |
| 723 | { |
| 724 | reloc_entry->address += input_section->output_offset; |
| 725 | return bfd_reloc_ok; |
| 726 | } |
| 727 | |
| 728 | if (output_bfd != (bfd *) NULL) |
| 729 | relocateable = true; |
| 730 | else |
| 731 | { |
| 732 | relocateable = false; |
| 733 | output_bfd = symbol->section->output_section->owner; |
| 734 | } |
| 735 | |
| 736 | if (bfd_is_und_section (symbol->section) |
| 737 | && relocateable == false) |
| 738 | return bfd_reloc_undefined; |
| 739 | |
| 740 | /* Some of the code below assumes the output bfd is ELF too. */ |
| 741 | if (output_bfd->xvec->flavour != bfd_target_elf_flavour) |
| 742 | abort (); |
| 743 | |
| 744 | /* We have to figure out the gp value, so that we can adjust the |
| 745 | symbol value correctly. We look up the symbol _gp in the output |
| 746 | BFD. If we can't find it, we're stuck. We cache it in the ELF |
| 747 | target data. We don't need to adjust the symbol value for an |
| 748 | external symbol if we are producing relocateable output. */ |
| 749 | if (elf_gp (output_bfd) == 0 |
| 750 | && (relocateable == false |
| 751 | || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| 752 | { |
| 753 | if (relocateable != false) |
| 754 | { |
| 755 | /* Make up a value. */ |
| 756 | elf_gp (output_bfd) = |
| 757 | symbol->section->output_section->vma + 0x4000; |
| 758 | } |
| 759 | else |
| 760 | { |
| 761 | unsigned int count; |
| 762 | asymbol **sym; |
| 763 | unsigned int i; |
| 764 | |
| 765 | count = bfd_get_symcount (output_bfd); |
| 766 | sym = bfd_get_outsymbols (output_bfd); |
| 767 | |
| 768 | if (sym == (asymbol **) NULL) |
| 769 | i = count; |
| 770 | else |
| 771 | { |
| 772 | for (i = 0; i < count; i++, sym++) |
| 773 | { |
| 774 | register CONST char *name; |
| 775 | |
| 776 | name = bfd_asymbol_name (*sym); |
| 777 | if (*name == '_' && strcmp (name, "_gp") == 0) |
| 778 | { |
| 779 | elf_gp (output_bfd) = bfd_asymbol_value (*sym); |
| 780 | break; |
| 781 | } |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | if (i >= count) |
| 786 | { |
| 787 | /* Only get the error once. */ |
| 788 | elf_gp (output_bfd) = 4; |
| 789 | *error_message = |
| 790 | (char *) "GP relative relocation when _gp not defined"; |
| 791 | return bfd_reloc_dangerous; |
| 792 | } |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | return gprel16_with_gp (abfd, symbol, reloc_entry, input_section, |
| 797 | relocateable, data, elf_gp (output_bfd)); |
| 798 | } |
| 799 | |
| 800 | static bfd_reloc_status_type |
| 801 | gprel16_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, |
| 802 | gp) |
| 803 | bfd *abfd; |
| 804 | asymbol *symbol; |
| 805 | arelent *reloc_entry; |
| 806 | asection *input_section; |
| 807 | boolean relocateable; |
| 808 | PTR data; |
| 809 | bfd_vma gp; |
| 810 | { |
| 811 | bfd_vma relocation; |
| 812 | unsigned long insn; |
| 813 | unsigned long val; |
| 814 | |
| 815 | if (bfd_is_com_section (symbol->section)) |
| 816 | relocation = 0; |
| 817 | else |
| 818 | relocation = symbol->value; |
| 819 | |
| 820 | relocation += symbol->section->output_section->vma; |
| 821 | relocation += symbol->section->output_offset; |
| 822 | |
| 823 | if (reloc_entry->address > input_section->_cooked_size) |
| 824 | return bfd_reloc_outofrange; |
| 825 | |
| 826 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 827 | |
| 828 | /* Set val to the offset into the section or symbol. */ |
| 829 | val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff; |
| 830 | if (val & 0x8000) |
| 831 | val -= 0x10000; |
| 832 | |
| 833 | /* Adjust val for the final section location and GP value. If we |
| 834 | are producing relocateable output, we don't want to do this for |
| 835 | an external symbol. */ |
| 836 | if (relocateable == false |
| 837 | || (symbol->flags & BSF_SECTION_SYM) != 0) |
| 838 | val += relocation - gp; |
| 839 | |
| 840 | insn = (insn &~ 0xffff) | (val & 0xffff); |
| 841 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| 842 | |
| 843 | if (relocateable != false) |
| 844 | reloc_entry->address += input_section->output_offset; |
| 845 | |
| 846 | /* Make sure it fit in 16 bits. */ |
| 847 | if (val >= 0x8000 && val < 0xffff8000) |
| 848 | return bfd_reloc_overflow; |
| 849 | |
| 850 | return bfd_reloc_ok; |
| 851 | } |
| 852 | |
| 853 | /* A mapping from BFD reloc types to MIPS ELF reloc types. */ |
| 854 | |
| 855 | struct elf_reloc_map { |
| 856 | bfd_reloc_code_real_type bfd_reloc_val; |
| 857 | enum reloc_type elf_reloc_val; |
| 858 | }; |
| 859 | |
| 860 | static CONST struct elf_reloc_map mips_reloc_map[] = |
| 861 | { |
| 862 | { BFD_RELOC_NONE, R_MIPS_NONE, }, |
| 863 | { BFD_RELOC_16, R_MIPS_16 }, |
| 864 | { BFD_RELOC_32, R_MIPS_32 }, |
| 865 | { BFD_RELOC_CTOR, R_MIPS_32 }, |
| 866 | { BFD_RELOC_32_PCREL, R_MIPS_REL32 }, |
| 867 | { BFD_RELOC_MIPS_JMP, R_MIPS_26 }, |
| 868 | { BFD_RELOC_HI16_S, R_MIPS_HI16 }, |
| 869 | { BFD_RELOC_LO16, R_MIPS_LO16 }, |
| 870 | { BFD_RELOC_MIPS_GPREL, R_MIPS_GPREL16 }, |
| 871 | { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL }, |
| 872 | { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 }, |
| 873 | { BFD_RELOC_16_PCREL, R_MIPS_PC16 }, |
| 874 | { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 }, |
| 875 | { BFD_RELOC_MIPS_GPREL32, R_MIPS_GPREL32 } |
| 876 | }; |
| 877 | |
| 878 | /* Given a BFD reloc type, return a howto structure. */ |
| 879 | |
| 880 | static reloc_howto_type * |
| 881 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) |
| 882 | bfd *abfd; |
| 883 | bfd_reloc_code_real_type code; |
| 884 | { |
| 885 | int i; |
| 886 | |
| 887 | for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); i++) |
| 888 | { |
| 889 | if (mips_reloc_map[i].bfd_reloc_val == code) |
| 890 | return &elf_mips_howto_table[(int) mips_reloc_map[i].elf_reloc_val]; |
| 891 | } |
| 892 | return NULL; |
| 893 | } |
| 894 | |
| 895 | /* Given a MIPS reloc type, fill in an arelent structure. */ |
| 896 | |
| 897 | static void |
| 898 | mips_info_to_howto_rel (abfd, cache_ptr, dst) |
| 899 | bfd *abfd; |
| 900 | arelent *cache_ptr; |
| 901 | Elf32_Internal_Rel *dst; |
| 902 | { |
| 903 | unsigned int r_type; |
| 904 | |
| 905 | r_type = ELF32_R_TYPE (dst->r_info); |
| 906 | BFD_ASSERT (r_type < (unsigned int) R_MIPS_max); |
| 907 | cache_ptr->howto = &elf_mips_howto_table[r_type]; |
| 908 | |
| 909 | /* The addend for a GPREL16 or LITERAL relocation comes from the GP |
| 910 | value for the object file. We get the addend now, rather than |
| 911 | when we do the relocation, because the symbol manipulations done |
| 912 | by the linker may cause us to lose track of the input BFD. */ |
| 913 | if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0 |
| 914 | && (r_type == (unsigned int) R_MIPS_GPREL16 |
| 915 | || r_type == (unsigned int) R_MIPS_LITERAL)) |
| 916 | cache_ptr->addend = elf_gp (abfd); |
| 917 | } |
| 918 | \f |
| 919 | /* A .reginfo section holds a single Elf32_RegInfo structure. These |
| 920 | routines swap this structure in and out. They are used outside of |
| 921 | BFD, so they are globally visible. */ |
| 922 | |
| 923 | void |
| 924 | bfd_mips_elf32_swap_reginfo_in (abfd, ex, in) |
| 925 | bfd *abfd; |
| 926 | const Elf32_External_RegInfo *ex; |
| 927 | Elf32_RegInfo *in; |
| 928 | { |
| 929 | in->ri_gprmask = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gprmask); |
| 930 | in->ri_cprmask[0] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[0]); |
| 931 | in->ri_cprmask[1] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[1]); |
| 932 | in->ri_cprmask[2] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[2]); |
| 933 | in->ri_cprmask[3] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[3]); |
| 934 | in->ri_gp_value = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gp_value); |
| 935 | } |
| 936 | |
| 937 | void |
| 938 | bfd_mips_elf32_swap_reginfo_out (abfd, in, ex) |
| 939 | bfd *abfd; |
| 940 | const Elf32_RegInfo *in; |
| 941 | Elf32_External_RegInfo *ex; |
| 942 | { |
| 943 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_gprmask, |
| 944 | (bfd_byte *) ex->ri_gprmask); |
| 945 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[0], |
| 946 | (bfd_byte *) ex->ri_cprmask[0]); |
| 947 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[1], |
| 948 | (bfd_byte *) ex->ri_cprmask[1]); |
| 949 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[2], |
| 950 | (bfd_byte *) ex->ri_cprmask[2]); |
| 951 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[3], |
| 952 | (bfd_byte *) ex->ri_cprmask[3]); |
| 953 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_gp_value, |
| 954 | (bfd_byte *) ex->ri_gp_value); |
| 955 | } |
| 956 | |
| 957 | /* Swap an entry in a .gptab section. Note that these routines rely |
| 958 | on the equivalence of the two elements of the union. */ |
| 959 | |
| 960 | static void |
| 961 | bfd_mips_elf32_swap_gptab_in (abfd, ex, in) |
| 962 | bfd *abfd; |
| 963 | const Elf32_External_gptab *ex; |
| 964 | Elf32_gptab *in; |
| 965 | { |
| 966 | in->gt_entry.gt_g_value = bfd_h_get_32 (abfd, ex->gt_entry.gt_g_value); |
| 967 | in->gt_entry.gt_bytes = bfd_h_get_32 (abfd, ex->gt_entry.gt_bytes); |
| 968 | } |
| 969 | |
| 970 | static void |
| 971 | bfd_mips_elf32_swap_gptab_out (abfd, in, ex) |
| 972 | bfd *abfd; |
| 973 | const Elf32_gptab *in; |
| 974 | Elf32_External_gptab *ex; |
| 975 | { |
| 976 | bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_g_value, |
| 977 | ex->gt_entry.gt_g_value); |
| 978 | bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_bytes, |
| 979 | ex->gt_entry.gt_bytes); |
| 980 | } |
| 981 | \f |
| 982 | /* Determine whether a symbol is global for the purposes of splitting |
| 983 | the symbol table into global symbols and local symbols. At least |
| 984 | on Irix 5, this split must be between section symbols and all other |
| 985 | symbols. On most ELF targets the split is between static symbols |
| 986 | and externally visible symbols. */ |
| 987 | |
| 988 | /*ARGSUSED*/ |
| 989 | static boolean |
| 990 | mips_elf_sym_is_global (abfd, sym) |
| 991 | bfd *abfd; |
| 992 | asymbol *sym; |
| 993 | { |
| 994 | return (sym->flags & BSF_SECTION_SYM) == 0 ? true : false; |
| 995 | } |
| 996 | \f |
| 997 | /* Set the right machine number for a MIPS ELF file. */ |
| 998 | |
| 999 | static boolean |
| 1000 | mips_elf_object_p (abfd) |
| 1001 | bfd *abfd; |
| 1002 | { |
| 1003 | switch (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) |
| 1004 | { |
| 1005 | default: |
| 1006 | case E_MIPS_ARCH_1: |
| 1007 | /* Just use the default, which was set in elfcode.h. */ |
| 1008 | break; |
| 1009 | |
| 1010 | case E_MIPS_ARCH_2: |
| 1011 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 6000); |
| 1012 | break; |
| 1013 | |
| 1014 | case E_MIPS_ARCH_3: |
| 1015 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 4000); |
| 1016 | break; |
| 1017 | } |
| 1018 | |
| 1019 | /* Irix 5 is broken. Object file symbol tables are not always |
| 1020 | sorted correctly such that local symbols precede global symbols, |
| 1021 | and the sh_info field in the symbol table is not always right. */ |
| 1022 | elf_bad_symtab (abfd) = true; |
| 1023 | |
| 1024 | return true; |
| 1025 | } |
| 1026 | |
| 1027 | /* The final processing done just before writing out a MIPS ELF object |
| 1028 | file. This gets the MIPS architecture right based on the machine |
| 1029 | number. */ |
| 1030 | |
| 1031 | /*ARGSUSED*/ |
| 1032 | static void |
| 1033 | mips_elf_final_write_processing (abfd, linker) |
| 1034 | bfd *abfd; |
| 1035 | boolean linker; |
| 1036 | { |
| 1037 | unsigned long val; |
| 1038 | unsigned int i; |
| 1039 | Elf_Internal_Shdr **hdrpp; |
| 1040 | |
| 1041 | switch (bfd_get_mach (abfd)) |
| 1042 | { |
| 1043 | case 3000: |
| 1044 | val = E_MIPS_ARCH_1; |
| 1045 | break; |
| 1046 | |
| 1047 | case 6000: |
| 1048 | val = E_MIPS_ARCH_2; |
| 1049 | break; |
| 1050 | |
| 1051 | case 4000: |
| 1052 | val = E_MIPS_ARCH_3; |
| 1053 | break; |
| 1054 | |
| 1055 | default: |
| 1056 | return; |
| 1057 | } |
| 1058 | |
| 1059 | elf_elfheader (abfd)->e_flags &=~ EF_MIPS_ARCH; |
| 1060 | elf_elfheader (abfd)->e_flags |= val; |
| 1061 | |
| 1062 | /* Set the sh_info field for .gptab sections. */ |
| 1063 | for (i = 1, hdrpp = elf_elfsections (abfd) + 1; |
| 1064 | i < elf_elfheader (abfd)->e_shnum; |
| 1065 | i++, hdrpp++) |
| 1066 | { |
| 1067 | if ((*hdrpp)->sh_type == SHT_MIPS_GPTAB) |
| 1068 | { |
| 1069 | const char *name; |
| 1070 | asection *sec; |
| 1071 | |
| 1072 | BFD_ASSERT ((*hdrpp)->bfd_section != NULL); |
| 1073 | name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section); |
| 1074 | BFD_ASSERT (name != NULL |
| 1075 | && strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0); |
| 1076 | sec = bfd_get_section_by_name (abfd, name + sizeof ".gptab" - 1); |
| 1077 | BFD_ASSERT (sec != NULL); |
| 1078 | (*hdrpp)->sh_info = elf_section_data (sec)->this_idx; |
| 1079 | } |
| 1080 | } |
| 1081 | } |
| 1082 | \f |
| 1083 | /* Handle a MIPS specific section when reading an object file. This |
| 1084 | is called when elfcode.h finds a section with an unknown type. |
| 1085 | FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure |
| 1086 | how to. */ |
| 1087 | |
| 1088 | static boolean |
| 1089 | mips_elf_section_from_shdr (abfd, hdr, name) |
| 1090 | bfd *abfd; |
| 1091 | Elf32_Internal_Shdr *hdr; |
| 1092 | char *name; |
| 1093 | { |
| 1094 | asection *newsect; |
| 1095 | |
| 1096 | /* There ought to be a place to keep ELF backend specific flags, but |
| 1097 | at the moment there isn't one. We just keep track of the |
| 1098 | sections by their name, instead. Fortunately, the ABI gives |
| 1099 | suggested names for all the MIPS specific sections, so we will |
| 1100 | probably get away with this. */ |
| 1101 | switch (hdr->sh_type) |
| 1102 | { |
| 1103 | case SHT_MIPS_LIBLIST: |
| 1104 | if (strcmp (name, ".liblist") != 0) |
| 1105 | return false; |
| 1106 | break; |
| 1107 | case SHT_MIPS_MSYM: |
| 1108 | if (strcmp (name, ".msym") != 0) |
| 1109 | return false; |
| 1110 | break; |
| 1111 | case SHT_MIPS_CONFLICT: |
| 1112 | if (strcmp (name, ".conflict") != 0) |
| 1113 | return false; |
| 1114 | break; |
| 1115 | case SHT_MIPS_GPTAB: |
| 1116 | if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) != 0) |
| 1117 | return false; |
| 1118 | break; |
| 1119 | case SHT_MIPS_UCODE: |
| 1120 | if (strcmp (name, ".ucode") != 0) |
| 1121 | return false; |
| 1122 | break; |
| 1123 | case SHT_MIPS_DEBUG: |
| 1124 | if (strcmp (name, ".mdebug") != 0) |
| 1125 | return false; |
| 1126 | break; |
| 1127 | case SHT_MIPS_REGINFO: |
| 1128 | if (strcmp (name, ".reginfo") != 0 |
| 1129 | || hdr->sh_size != sizeof (Elf32_External_RegInfo)) |
| 1130 | return false; |
| 1131 | break; |
| 1132 | case SHT_MIPS_OPTIONS: |
| 1133 | if (strcmp (name, ".options") != 0) |
| 1134 | return false; |
| 1135 | break; |
| 1136 | case SHT_MIPS_DWARF: |
| 1137 | if (strncmp (name, ".debug_", sizeof ".debug_" - 1) != 0) |
| 1138 | return false; |
| 1139 | break; |
| 1140 | case SHT_MIPS_EVENTS: |
| 1141 | if (strncmp (name, ".MIPS.events.", sizeof ".MIPS.events." - 1) != 0) |
| 1142 | return false; |
| 1143 | break; |
| 1144 | default: |
| 1145 | return false; |
| 1146 | } |
| 1147 | |
| 1148 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 1149 | return false; |
| 1150 | newsect = hdr->bfd_section; |
| 1151 | |
| 1152 | if (hdr->sh_type == SHT_MIPS_DEBUG) |
| 1153 | { |
| 1154 | if (! bfd_set_section_flags (abfd, newsect, |
| 1155 | (bfd_get_section_flags (abfd, newsect) |
| 1156 | | SEC_DEBUGGING))) |
| 1157 | return false; |
| 1158 | } |
| 1159 | |
| 1160 | /* FIXME: We should record sh_info for a .gptab section. */ |
| 1161 | |
| 1162 | /* For a .reginfo section, set the gp value in the tdata information |
| 1163 | from the contents of this section. We need the gp value while |
| 1164 | processing relocs, so we just get it now. */ |
| 1165 | if (hdr->sh_type == SHT_MIPS_REGINFO) |
| 1166 | { |
| 1167 | Elf32_External_RegInfo ext; |
| 1168 | Elf32_RegInfo s; |
| 1169 | |
| 1170 | if (! bfd_get_section_contents (abfd, newsect, (PTR) &ext, |
| 1171 | (file_ptr) 0, sizeof ext)) |
| 1172 | return false; |
| 1173 | bfd_mips_elf32_swap_reginfo_in (abfd, &ext, &s); |
| 1174 | elf_gp (abfd) = s.ri_gp_value; |
| 1175 | } |
| 1176 | |
| 1177 | return true; |
| 1178 | } |
| 1179 | |
| 1180 | /* Set the correct type for a MIPS ELF section. We do this by the |
| 1181 | section name, which is a hack, but ought to work. */ |
| 1182 | |
| 1183 | static boolean |
| 1184 | mips_elf_fake_sections (abfd, hdr, sec) |
| 1185 | bfd *abfd; |
| 1186 | Elf32_Internal_Shdr *hdr; |
| 1187 | asection *sec; |
| 1188 | { |
| 1189 | register const char *name; |
| 1190 | |
| 1191 | name = bfd_get_section_name (abfd, sec); |
| 1192 | |
| 1193 | if (strcmp (name, ".liblist") == 0) |
| 1194 | { |
| 1195 | hdr->sh_type = SHT_MIPS_LIBLIST; |
| 1196 | hdr->sh_info = sec->_raw_size / sizeof (Elf32_Lib); |
| 1197 | /* FIXME: Set the sh_link field. */ |
| 1198 | } |
| 1199 | else if (strcmp (name, ".msym") == 0) |
| 1200 | { |
| 1201 | hdr->sh_type = SHT_MIPS_MSYM; |
| 1202 | hdr->sh_entsize = 8; |
| 1203 | /* FIXME: Set the sh_info field. */ |
| 1204 | } |
| 1205 | else if (strcmp (name, ".conflict") == 0) |
| 1206 | hdr->sh_type = SHT_MIPS_CONFLICT; |
| 1207 | else if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0) |
| 1208 | { |
| 1209 | hdr->sh_type = SHT_MIPS_GPTAB; |
| 1210 | hdr->sh_entsize = sizeof (Elf32_External_gptab); |
| 1211 | /* The sh_info field is set in mips_elf_final_write_processing. */ |
| 1212 | } |
| 1213 | else if (strcmp (name, ".ucode") == 0) |
| 1214 | hdr->sh_type = SHT_MIPS_UCODE; |
| 1215 | else if (strcmp (name, ".mdebug") == 0) |
| 1216 | { |
| 1217 | hdr->sh_type = SHT_MIPS_DEBUG; |
| 1218 | hdr->sh_entsize = 1; |
| 1219 | } |
| 1220 | else if (strcmp (name, ".reginfo") == 0) |
| 1221 | { |
| 1222 | hdr->sh_type = SHT_MIPS_REGINFO; |
| 1223 | hdr->sh_entsize = 1; |
| 1224 | |
| 1225 | /* Force the section size to the correct value, even if the |
| 1226 | linker thinks it is larger. The link routine below will only |
| 1227 | write out this much data for .reginfo. */ |
| 1228 | hdr->sh_size = sec->_raw_size = sizeof (Elf32_External_RegInfo); |
| 1229 | } |
| 1230 | else if (strcmp (name, ".options") == 0) |
| 1231 | { |
| 1232 | hdr->sh_type = SHT_MIPS_OPTIONS; |
| 1233 | hdr->sh_entsize = 1; |
| 1234 | } |
| 1235 | else if (strncmp (name, ".debug_", sizeof ".debug_" - 1) == 0) |
| 1236 | hdr->sh_type = SHT_MIPS_DWARF; |
| 1237 | else if (strncmp (name, ".MIPS.events.", sizeof ".MIPS.events." - 1) == 0) |
| 1238 | hdr->sh_type = SHT_MIPS_EVENTS; |
| 1239 | |
| 1240 | return true; |
| 1241 | } |
| 1242 | |
| 1243 | /* Given a BFD section, try to locate the corresponding ELF section |
| 1244 | index. */ |
| 1245 | |
| 1246 | static boolean |
| 1247 | mips_elf_section_from_bfd_section (abfd, hdr, sec, retval) |
| 1248 | bfd *abfd; |
| 1249 | Elf32_Internal_Shdr *hdr; |
| 1250 | asection *sec; |
| 1251 | int *retval; |
| 1252 | { |
| 1253 | if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) |
| 1254 | { |
| 1255 | *retval = SHN_MIPS_SCOMMON; |
| 1256 | return true; |
| 1257 | } |
| 1258 | if (strcmp (bfd_get_section_name (abfd, sec), ".acommon") == 0) |
| 1259 | { |
| 1260 | *retval = SHN_MIPS_ACOMMON; |
| 1261 | return true; |
| 1262 | } |
| 1263 | return false; |
| 1264 | } |
| 1265 | |
| 1266 | /* Work over a section just before writing it out. We update the GP |
| 1267 | value in the .reginfo section based on the value we are using. |
| 1268 | FIXME: We recognize sections that need the SHF_MIPS_GPREL flag by |
| 1269 | name; there has to be a better way. */ |
| 1270 | |
| 1271 | static boolean |
| 1272 | mips_elf_section_processing (abfd, hdr) |
| 1273 | bfd *abfd; |
| 1274 | Elf32_Internal_Shdr *hdr; |
| 1275 | { |
| 1276 | if (hdr->sh_type == SHT_MIPS_REGINFO) |
| 1277 | { |
| 1278 | bfd_byte buf[4]; |
| 1279 | |
| 1280 | BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo)); |
| 1281 | BFD_ASSERT (hdr->contents == NULL); |
| 1282 | |
| 1283 | if (bfd_seek (abfd, |
| 1284 | hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4, |
| 1285 | SEEK_SET) == -1) |
| 1286 | return false; |
| 1287 | bfd_h_put_32 (abfd, (bfd_vma) elf_gp (abfd), buf); |
| 1288 | if (bfd_write (buf, (bfd_size_type) 1, (bfd_size_type) 4, abfd) != 4) |
| 1289 | return false; |
| 1290 | } |
| 1291 | |
| 1292 | if (hdr->bfd_section != NULL) |
| 1293 | { |
| 1294 | const char *name = bfd_get_section_name (abfd, hdr->bfd_section); |
| 1295 | |
| 1296 | if (strcmp (name, ".sdata") == 0) |
| 1297 | { |
| 1298 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; |
| 1299 | hdr->sh_type = SHT_PROGBITS; |
| 1300 | } |
| 1301 | else if (strcmp (name, ".sbss") == 0) |
| 1302 | { |
| 1303 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; |
| 1304 | hdr->sh_type = SHT_NOBITS; |
| 1305 | } |
| 1306 | else if (strcmp (name, ".lit8") == 0 |
| 1307 | || strcmp (name, ".lit4") == 0) |
| 1308 | { |
| 1309 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; |
| 1310 | hdr->sh_type = SHT_PROGBITS; |
| 1311 | } |
| 1312 | } |
| 1313 | |
| 1314 | return true; |
| 1315 | } |
| 1316 | \f |
| 1317 | /* MIPS ELF uses two common sections. One is the usual one, and the |
| 1318 | other is for small objects. All the small objects are kept |
| 1319 | together, and then referenced via the gp pointer, which yields |
| 1320 | faster assembler code. This is what we use for the small common |
| 1321 | section. This approach is copied from ecoff.c. */ |
| 1322 | static asection mips_elf_scom_section; |
| 1323 | static asymbol mips_elf_scom_symbol; |
| 1324 | static asymbol *mips_elf_scom_symbol_ptr; |
| 1325 | |
| 1326 | /* MIPS ELF also uses an acommon section, which represents an |
| 1327 | allocated common symbol which may be overridden by a |
| 1328 | definition in a shared library. */ |
| 1329 | static asection mips_elf_acom_section; |
| 1330 | static asymbol mips_elf_acom_symbol; |
| 1331 | static asymbol *mips_elf_acom_symbol_ptr; |
| 1332 | |
| 1333 | /* Handle the special MIPS section numbers that a symbol may use. */ |
| 1334 | |
| 1335 | static void |
| 1336 | mips_elf_symbol_processing (abfd, asym) |
| 1337 | bfd *abfd; |
| 1338 | asymbol *asym; |
| 1339 | { |
| 1340 | elf_symbol_type *elfsym; |
| 1341 | |
| 1342 | elfsym = (elf_symbol_type *) asym; |
| 1343 | switch (elfsym->internal_elf_sym.st_shndx) |
| 1344 | { |
| 1345 | case SHN_MIPS_ACOMMON: |
| 1346 | /* This section is used in a dynamically linked executable file. |
| 1347 | It is an allocated common section. The dynamic linker can |
| 1348 | either resolve these symbols to something in a shared |
| 1349 | library, or it can just leave them here. For our purposes, |
| 1350 | we can consider these symbols to be in a new section. */ |
| 1351 | if (mips_elf_acom_section.name == NULL) |
| 1352 | { |
| 1353 | /* Initialize the acommon section. */ |
| 1354 | mips_elf_acom_section.name = ".acommon"; |
| 1355 | mips_elf_acom_section.flags = SEC_NO_FLAGS; |
| 1356 | mips_elf_acom_section.output_section = &mips_elf_acom_section; |
| 1357 | mips_elf_acom_section.symbol = &mips_elf_acom_symbol; |
| 1358 | mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr; |
| 1359 | mips_elf_acom_symbol.name = ".acommon"; |
| 1360 | mips_elf_acom_symbol.flags = BSF_SECTION_SYM; |
| 1361 | mips_elf_acom_symbol.section = &mips_elf_acom_section; |
| 1362 | mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol; |
| 1363 | } |
| 1364 | asym->section = &mips_elf_acom_section; |
| 1365 | break; |
| 1366 | |
| 1367 | case SHN_COMMON: |
| 1368 | /* Common symbols less than the GP size are automatically |
| 1369 | treated as SHN_MIPS_SCOMMON symbols. */ |
| 1370 | if (asym->value > elf_gp_size (abfd)) |
| 1371 | break; |
| 1372 | /* Fall through. */ |
| 1373 | case SHN_MIPS_SCOMMON: |
| 1374 | if (mips_elf_scom_section.name == NULL) |
| 1375 | { |
| 1376 | /* Initialize the small common section. */ |
| 1377 | mips_elf_scom_section.name = ".scommon"; |
| 1378 | mips_elf_scom_section.flags = SEC_IS_COMMON; |
| 1379 | mips_elf_scom_section.output_section = &mips_elf_scom_section; |
| 1380 | mips_elf_scom_section.symbol = &mips_elf_scom_symbol; |
| 1381 | mips_elf_scom_section.symbol_ptr_ptr = &mips_elf_scom_symbol_ptr; |
| 1382 | mips_elf_scom_symbol.name = ".scommon"; |
| 1383 | mips_elf_scom_symbol.flags = BSF_SECTION_SYM; |
| 1384 | mips_elf_scom_symbol.section = &mips_elf_scom_section; |
| 1385 | mips_elf_scom_symbol_ptr = &mips_elf_scom_symbol; |
| 1386 | } |
| 1387 | asym->section = &mips_elf_scom_section; |
| 1388 | asym->value = elfsym->internal_elf_sym.st_size; |
| 1389 | break; |
| 1390 | |
| 1391 | case SHN_MIPS_SUNDEFINED: |
| 1392 | asym->section = bfd_und_section_ptr; |
| 1393 | break; |
| 1394 | } |
| 1395 | } |
| 1396 | \f |
| 1397 | /* Read ECOFF debugging information from a .mdebug section into a |
| 1398 | ecoff_debug_info structure. */ |
| 1399 | |
| 1400 | static boolean |
| 1401 | mips_elf_read_ecoff_info (abfd, section, debug) |
| 1402 | bfd *abfd; |
| 1403 | asection *section; |
| 1404 | struct ecoff_debug_info *debug; |
| 1405 | { |
| 1406 | HDRR *symhdr; |
| 1407 | const struct ecoff_debug_swap *swap; |
| 1408 | char *ext_hdr = NULL; |
| 1409 | |
| 1410 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 1411 | |
| 1412 | ext_hdr = (char *) malloc (swap->external_hdr_size); |
| 1413 | if (ext_hdr == NULL && swap->external_hdr_size != 0) |
| 1414 | { |
| 1415 | bfd_set_error (bfd_error_no_memory); |
| 1416 | goto error_return; |
| 1417 | } |
| 1418 | |
| 1419 | if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, |
| 1420 | swap->external_hdr_size) |
| 1421 | == false) |
| 1422 | goto error_return; |
| 1423 | |
| 1424 | symhdr = &debug->symbolic_header; |
| 1425 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); |
| 1426 | |
| 1427 | /* The symbolic header contains absolute file offsets and sizes to |
| 1428 | read. */ |
| 1429 | #define READ(ptr, offset, count, size, type) \ |
| 1430 | if (symhdr->count == 0) \ |
| 1431 | debug->ptr = NULL; \ |
| 1432 | else \ |
| 1433 | { \ |
| 1434 | debug->ptr = (type) malloc (size * symhdr->count); \ |
| 1435 | if (debug->ptr == NULL) \ |
| 1436 | { \ |
| 1437 | bfd_set_error (bfd_error_no_memory); \ |
| 1438 | goto error_return; \ |
| 1439 | } \ |
| 1440 | if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ |
| 1441 | || (bfd_read (debug->ptr, size, symhdr->count, \ |
| 1442 | abfd) != size * symhdr->count)) \ |
| 1443 | goto error_return; \ |
| 1444 | } |
| 1445 | |
| 1446 | READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); |
| 1447 | READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR); |
| 1448 | READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR); |
| 1449 | READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR); |
| 1450 | READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR); |
| 1451 | READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), |
| 1452 | union aux_ext *); |
| 1453 | READ (ss, cbSsOffset, issMax, sizeof (char), char *); |
| 1454 | READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); |
| 1455 | READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR); |
| 1456 | READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR); |
| 1457 | READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR); |
| 1458 | #undef READ |
| 1459 | |
| 1460 | debug->fdr = NULL; |
| 1461 | debug->adjust = NULL; |
| 1462 | |
| 1463 | return true; |
| 1464 | |
| 1465 | error_return: |
| 1466 | if (ext_hdr != NULL) |
| 1467 | free (ext_hdr); |
| 1468 | if (debug->line != NULL) |
| 1469 | free (debug->line); |
| 1470 | if (debug->external_dnr != NULL) |
| 1471 | free (debug->external_dnr); |
| 1472 | if (debug->external_pdr != NULL) |
| 1473 | free (debug->external_pdr); |
| 1474 | if (debug->external_sym != NULL) |
| 1475 | free (debug->external_sym); |
| 1476 | if (debug->external_opt != NULL) |
| 1477 | free (debug->external_opt); |
| 1478 | if (debug->external_aux != NULL) |
| 1479 | free (debug->external_aux); |
| 1480 | if (debug->ss != NULL) |
| 1481 | free (debug->ss); |
| 1482 | if (debug->ssext != NULL) |
| 1483 | free (debug->ssext); |
| 1484 | if (debug->external_fdr != NULL) |
| 1485 | free (debug->external_fdr); |
| 1486 | if (debug->external_rfd != NULL) |
| 1487 | free (debug->external_rfd); |
| 1488 | if (debug->external_ext != NULL) |
| 1489 | free (debug->external_ext); |
| 1490 | return false; |
| 1491 | } |
| 1492 | \f |
| 1493 | /* MIPS ELF local labels start with '$', not 'L'. */ |
| 1494 | |
| 1495 | /*ARGSUSED*/ |
| 1496 | static boolean |
| 1497 | mips_elf_is_local_label (abfd, symbol) |
| 1498 | bfd *abfd; |
| 1499 | asymbol *symbol; |
| 1500 | { |
| 1501 | return symbol->name[0] == '$'; |
| 1502 | } |
| 1503 | |
| 1504 | /* MIPS ELF uses a special find_nearest_line routine in order the |
| 1505 | handle the ECOFF debugging information. */ |
| 1506 | |
| 1507 | struct mips_elf_find_line |
| 1508 | { |
| 1509 | struct ecoff_debug_info d; |
| 1510 | struct ecoff_find_line i; |
| 1511 | }; |
| 1512 | |
| 1513 | static boolean |
| 1514 | mips_elf_find_nearest_line (abfd, section, symbols, offset, filename_ptr, |
| 1515 | functionname_ptr, line_ptr) |
| 1516 | bfd *abfd; |
| 1517 | asection *section; |
| 1518 | asymbol **symbols; |
| 1519 | bfd_vma offset; |
| 1520 | const char **filename_ptr; |
| 1521 | const char **functionname_ptr; |
| 1522 | unsigned int *line_ptr; |
| 1523 | { |
| 1524 | asection *msec; |
| 1525 | |
| 1526 | msec = bfd_get_section_by_name (abfd, ".mdebug"); |
| 1527 | if (msec != NULL) |
| 1528 | { |
| 1529 | struct mips_elf_find_line *fi; |
| 1530 | const struct ecoff_debug_swap * const swap = |
| 1531 | get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 1532 | |
| 1533 | fi = elf_tdata (abfd)->find_line_info; |
| 1534 | if (fi == NULL) |
| 1535 | { |
| 1536 | bfd_size_type external_fdr_size; |
| 1537 | char *fraw_src; |
| 1538 | char *fraw_end; |
| 1539 | struct fdr *fdr_ptr; |
| 1540 | |
| 1541 | fi = ((struct mips_elf_find_line *) |
| 1542 | bfd_alloc (abfd, sizeof (struct mips_elf_find_line))); |
| 1543 | if (fi == NULL) |
| 1544 | { |
| 1545 | bfd_set_error (bfd_error_no_memory); |
| 1546 | return false; |
| 1547 | } |
| 1548 | |
| 1549 | memset (fi, 0, sizeof (struct mips_elf_find_line)); |
| 1550 | |
| 1551 | if (! mips_elf_read_ecoff_info (abfd, msec, &fi->d)) |
| 1552 | return false; |
| 1553 | |
| 1554 | /* Swap in the FDR information. */ |
| 1555 | fi->d.fdr = ((struct fdr *) |
| 1556 | bfd_alloc (abfd, |
| 1557 | (fi->d.symbolic_header.ifdMax * |
| 1558 | sizeof (struct fdr)))); |
| 1559 | if (fi->d.fdr == NULL) |
| 1560 | { |
| 1561 | bfd_set_error (bfd_error_no_memory); |
| 1562 | return false; |
| 1563 | } |
| 1564 | external_fdr_size = swap->external_fdr_size; |
| 1565 | fdr_ptr = fi->d.fdr; |
| 1566 | fraw_src = (char *) fi->d.external_fdr; |
| 1567 | fraw_end = (fraw_src |
| 1568 | + fi->d.symbolic_header.ifdMax * external_fdr_size); |
| 1569 | for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) |
| 1570 | (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr); |
| 1571 | |
| 1572 | elf_tdata (abfd)->find_line_info = fi; |
| 1573 | |
| 1574 | /* Note that we don't bother to ever free this information. |
| 1575 | find_nearest_line is either called all the time, as in |
| 1576 | objdump -l, so the information should be saved, or it is |
| 1577 | rarely called, as in ld error messages, so the memory |
| 1578 | wasted is unimportant. Still, it would probably be a |
| 1579 | good idea for free_cached_info to throw it away. */ |
| 1580 | } |
| 1581 | |
| 1582 | if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, |
| 1583 | &fi->i, filename_ptr, functionname_ptr, |
| 1584 | line_ptr)) |
| 1585 | return true; |
| 1586 | } |
| 1587 | |
| 1588 | /* Fall back on the generic ELF find_nearest_line routine. */ |
| 1589 | |
| 1590 | return _bfd_elf_find_nearest_line (abfd, section, symbols, offset, |
| 1591 | filename_ptr, functionname_ptr, |
| 1592 | line_ptr); |
| 1593 | } |
| 1594 | \f |
| 1595 | /* The MIPS ELF linker needs additional information for each symbol in |
| 1596 | the global hash table. */ |
| 1597 | |
| 1598 | struct mips_elf_link_hash_entry |
| 1599 | { |
| 1600 | struct elf_link_hash_entry root; |
| 1601 | |
| 1602 | /* External symbol information. */ |
| 1603 | EXTR esym; |
| 1604 | }; |
| 1605 | |
| 1606 | /* MIPS ELF linker hash table. */ |
| 1607 | |
| 1608 | struct mips_elf_link_hash_table |
| 1609 | { |
| 1610 | struct elf_link_hash_table root; |
| 1611 | }; |
| 1612 | |
| 1613 | /* Look up an entry in a MIPS ELF linker hash table. */ |
| 1614 | |
| 1615 | #define mips_elf_link_hash_lookup(table, string, create, copy, follow) \ |
| 1616 | ((struct mips_elf_link_hash_entry *) \ |
| 1617 | elf_link_hash_lookup (&(table)->root, (string), (create), \ |
| 1618 | (copy), (follow))) |
| 1619 | |
| 1620 | /* Traverse a MIPS ELF linker hash table. */ |
| 1621 | |
| 1622 | #define mips_elf_link_hash_traverse(table, func, info) \ |
| 1623 | (elf_link_hash_traverse \ |
| 1624 | (&(table)->root, \ |
| 1625 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ |
| 1626 | (info))) |
| 1627 | |
| 1628 | /* Get the MIPS ELF linker hash table from a link_info structure. */ |
| 1629 | |
| 1630 | #define mips_elf_hash_table(p) \ |
| 1631 | ((struct mips_elf_link_hash_table *) ((p)->hash)) |
| 1632 | |
| 1633 | static boolean mips_elf_output_extsym |
| 1634 | PARAMS ((struct mips_elf_link_hash_entry *, PTR)); |
| 1635 | |
| 1636 | /* Create an entry in a MIPS ELF linker hash table. */ |
| 1637 | |
| 1638 | static struct bfd_hash_entry * |
| 1639 | mips_elf_link_hash_newfunc (entry, table, string) |
| 1640 | struct bfd_hash_entry *entry; |
| 1641 | struct bfd_hash_table *table; |
| 1642 | const char *string; |
| 1643 | { |
| 1644 | struct mips_elf_link_hash_entry *ret = |
| 1645 | (struct mips_elf_link_hash_entry *) entry; |
| 1646 | |
| 1647 | /* Allocate the structure if it has not already been allocated by a |
| 1648 | subclass. */ |
| 1649 | if (ret == (struct mips_elf_link_hash_entry *) NULL) |
| 1650 | ret = ((struct mips_elf_link_hash_entry *) |
| 1651 | bfd_hash_allocate (table, |
| 1652 | sizeof (struct mips_elf_link_hash_entry))); |
| 1653 | if (ret == (struct mips_elf_link_hash_entry *) NULL) |
| 1654 | { |
| 1655 | bfd_set_error (bfd_error_no_memory); |
| 1656 | return (struct bfd_hash_entry *) ret; |
| 1657 | } |
| 1658 | |
| 1659 | /* Call the allocation method of the superclass. */ |
| 1660 | ret = ((struct mips_elf_link_hash_entry *) |
| 1661 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 1662 | table, string)); |
| 1663 | if (ret != (struct mips_elf_link_hash_entry *) NULL) |
| 1664 | { |
| 1665 | /* Set local fields. */ |
| 1666 | memset (&ret->esym, 0, sizeof (EXTR)); |
| 1667 | /* We use -2 as a marker to indicate that the information has |
| 1668 | not been set. -1 means there is no associated ifd. */ |
| 1669 | ret->esym.ifd = -2; |
| 1670 | } |
| 1671 | |
| 1672 | return (struct bfd_hash_entry *) ret; |
| 1673 | } |
| 1674 | |
| 1675 | /* Create a MIPS ELF linker hash table. */ |
| 1676 | |
| 1677 | static struct bfd_link_hash_table * |
| 1678 | mips_elf_link_hash_table_create (abfd) |
| 1679 | bfd *abfd; |
| 1680 | { |
| 1681 | struct mips_elf_link_hash_table *ret; |
| 1682 | |
| 1683 | ret = ((struct mips_elf_link_hash_table *) |
| 1684 | bfd_alloc (abfd, sizeof (struct mips_elf_link_hash_table))); |
| 1685 | if (ret == (struct mips_elf_link_hash_table *) NULL) |
| 1686 | { |
| 1687 | bfd_set_error (bfd_error_no_memory); |
| 1688 | return NULL; |
| 1689 | } |
| 1690 | |
| 1691 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 1692 | mips_elf_link_hash_newfunc)) |
| 1693 | { |
| 1694 | bfd_release (abfd, ret); |
| 1695 | return NULL; |
| 1696 | } |
| 1697 | |
| 1698 | return &ret->root.root; |
| 1699 | } |
| 1700 | |
| 1701 | /* Hook called by the linker routine which adds symbols from an object |
| 1702 | file. We must handle the special MIPS section numbers here. */ |
| 1703 | |
| 1704 | /*ARGSUSED*/ |
| 1705 | static boolean |
| 1706 | mips_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| 1707 | bfd *abfd; |
| 1708 | struct bfd_link_info *info; |
| 1709 | const Elf_Internal_Sym *sym; |
| 1710 | const char **namep; |
| 1711 | flagword *flagsp; |
| 1712 | asection **secp; |
| 1713 | bfd_vma *valp; |
| 1714 | { |
| 1715 | switch (sym->st_shndx) |
| 1716 | { |
| 1717 | case SHN_COMMON: |
| 1718 | /* Common symbols less than the GP size are automatically |
| 1719 | treated as SHN_MIPS_SCOMMON symbols. */ |
| 1720 | if (sym->st_size > elf_gp_size (abfd)) |
| 1721 | break; |
| 1722 | /* Fall through. */ |
| 1723 | case SHN_MIPS_SCOMMON: |
| 1724 | *secp = bfd_make_section_old_way (abfd, ".scommon"); |
| 1725 | (*secp)->flags |= SEC_IS_COMMON; |
| 1726 | *valp = sym->st_size; |
| 1727 | break; |
| 1728 | |
| 1729 | case SHN_MIPS_SUNDEFINED: |
| 1730 | *secp = bfd_und_section_ptr; |
| 1731 | break; |
| 1732 | } |
| 1733 | |
| 1734 | return true; |
| 1735 | } |
| 1736 | |
| 1737 | /* Structure used to pass information to mips_elf_output_extsym. */ |
| 1738 | |
| 1739 | struct extsym_info |
| 1740 | { |
| 1741 | bfd *abfd; |
| 1742 | struct bfd_link_info *info; |
| 1743 | struct ecoff_debug_info *debug; |
| 1744 | const struct ecoff_debug_swap *swap; |
| 1745 | boolean failed; |
| 1746 | }; |
| 1747 | |
| 1748 | /* This routine is used to write out ECOFF debugging external symbol |
| 1749 | information. It is called via mips_elf_link_hash_traverse. The |
| 1750 | ECOFF external symbol information must match the ELF external |
| 1751 | symbol information. Unfortunately, at this point we don't know |
| 1752 | whether a symbol is required by reloc information, so the two |
| 1753 | tables may wind up being different. We must sort out the external |
| 1754 | symbol information before we can set the final size of the .mdebug |
| 1755 | section, and we must set the size of the .mdebug section before we |
| 1756 | can relocate any sections, and we can't know which symbols are |
| 1757 | required by relocation until we relocate the sections. |
| 1758 | Fortunately, it is relatively unlikely that any symbol will be |
| 1759 | stripped but required by a reloc. In particular, it can not happen |
| 1760 | when generating a final executable. */ |
| 1761 | |
| 1762 | static boolean |
| 1763 | mips_elf_output_extsym (h, data) |
| 1764 | struct mips_elf_link_hash_entry *h; |
| 1765 | PTR data; |
| 1766 | { |
| 1767 | struct extsym_info *einfo = (struct extsym_info *) data; |
| 1768 | boolean strip; |
| 1769 | |
| 1770 | if (h->root.indx == -2) |
| 1771 | strip = false; |
| 1772 | else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 1773 | || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) |
| 1774 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
| 1775 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) |
| 1776 | strip = true; |
| 1777 | else if (einfo->info->strip == strip_all |
| 1778 | || (einfo->info->strip == strip_some |
| 1779 | && bfd_hash_lookup (einfo->info->keep_hash, |
| 1780 | h->root.root.root.string, |
| 1781 | false, false) == NULL)) |
| 1782 | strip = true; |
| 1783 | else |
| 1784 | strip = false; |
| 1785 | |
| 1786 | if (strip) |
| 1787 | return true; |
| 1788 | |
| 1789 | if (h->esym.ifd == -2) |
| 1790 | { |
| 1791 | h->esym.jmptbl = 0; |
| 1792 | h->esym.cobol_main = 0; |
| 1793 | h->esym.weakext = 0; |
| 1794 | h->esym.reserved = 0; |
| 1795 | h->esym.ifd = ifdNil; |
| 1796 | h->esym.asym.value = 0; |
| 1797 | h->esym.asym.st = stGlobal; |
| 1798 | |
| 1799 | if (h->root.root.type != bfd_link_hash_defined |
| 1800 | && h->root.root.type != bfd_link_hash_defweak) |
| 1801 | h->esym.asym.sc = scAbs; |
| 1802 | else |
| 1803 | { |
| 1804 | asection *output_section; |
| 1805 | const char *name; |
| 1806 | |
| 1807 | output_section = h->root.root.u.def.section->output_section; |
| 1808 | name = bfd_section_name (output_section->owner, output_section); |
| 1809 | |
| 1810 | if (strcmp (name, ".text") == 0) |
| 1811 | h->esym.asym.sc = scText; |
| 1812 | else if (strcmp (name, ".data") == 0) |
| 1813 | h->esym.asym.sc = scData; |
| 1814 | else if (strcmp (name, ".sdata") == 0) |
| 1815 | h->esym.asym.sc = scSData; |
| 1816 | else if (strcmp (name, ".rodata") == 0 |
| 1817 | || strcmp (name, ".rdata") == 0) |
| 1818 | h->esym.asym.sc = scRData; |
| 1819 | else if (strcmp (name, ".bss") == 0) |
| 1820 | h->esym.asym.sc = scBss; |
| 1821 | else if (strcmp (name, ".sbss") == 0) |
| 1822 | h->esym.asym.sc = scSBss; |
| 1823 | else if (strcmp (name, ".init") == 0) |
| 1824 | h->esym.asym.sc = scInit; |
| 1825 | else if (strcmp (name, ".fini") == 0) |
| 1826 | h->esym.asym.sc = scFini; |
| 1827 | else |
| 1828 | h->esym.asym.sc = scAbs; |
| 1829 | } |
| 1830 | |
| 1831 | h->esym.asym.reserved = 0; |
| 1832 | h->esym.asym.index = indexNil; |
| 1833 | } |
| 1834 | |
| 1835 | if (h->root.root.type == bfd_link_hash_common) |
| 1836 | h->esym.asym.value = h->root.root.u.c.size; |
| 1837 | else if (h->root.root.type == bfd_link_hash_defined |
| 1838 | || h->root.root.type == bfd_link_hash_defweak) |
| 1839 | { |
| 1840 | asection *sec; |
| 1841 | |
| 1842 | if (h->esym.asym.sc == scCommon) |
| 1843 | h->esym.asym.sc = scBss; |
| 1844 | else if (h->esym.asym.sc == scSCommon) |
| 1845 | h->esym.asym.sc = scSBss; |
| 1846 | |
| 1847 | sec = h->root.root.u.def.section; |
| 1848 | h->esym.asym.value = (h->root.root.u.def.value |
| 1849 | + sec->output_offset |
| 1850 | + sec->output_section->vma); |
| 1851 | } |
| 1852 | |
| 1853 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, |
| 1854 | h->root.root.root.string, |
| 1855 | &h->esym)) |
| 1856 | { |
| 1857 | einfo->failed = true; |
| 1858 | return false; |
| 1859 | } |
| 1860 | |
| 1861 | return true; |
| 1862 | } |
| 1863 | |
| 1864 | /* A comparison routine used to sort .gptab entries. */ |
| 1865 | |
| 1866 | static int |
| 1867 | gptab_compare (p1, p2) |
| 1868 | const PTR p1; |
| 1869 | const PTR p2; |
| 1870 | { |
| 1871 | const Elf32_gptab *a1 = (const Elf32_gptab *) p1; |
| 1872 | const Elf32_gptab *a2 = (const Elf32_gptab *) p2; |
| 1873 | |
| 1874 | return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value; |
| 1875 | } |
| 1876 | |
| 1877 | /* We need to use a special link routine to handle the .reginfo and |
| 1878 | the .mdebug sections. We need to merge all instances of these |
| 1879 | sections together, not write them all out sequentially. */ |
| 1880 | |
| 1881 | static boolean |
| 1882 | mips_elf_final_link (abfd, info) |
| 1883 | bfd *abfd; |
| 1884 | struct bfd_link_info *info; |
| 1885 | { |
| 1886 | asection **secpp; |
| 1887 | asection *o; |
| 1888 | struct bfd_link_order *p; |
| 1889 | asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec; |
| 1890 | Elf32_RegInfo reginfo; |
| 1891 | struct ecoff_debug_info debug; |
| 1892 | const struct ecoff_debug_swap *swap |
| 1893 | = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 1894 | HDRR *symhdr = &debug.symbolic_header; |
| 1895 | PTR mdebug_handle = NULL; |
| 1896 | |
| 1897 | /* Drop the .options section, since it has special semantics which I |
| 1898 | haven't bothered to figure out. */ |
| 1899 | for (secpp = &abfd->sections; *secpp != NULL; secpp = &(*secpp)->next) |
| 1900 | { |
| 1901 | if (strcmp ((*secpp)->name, ".options") == 0) |
| 1902 | { |
| 1903 | for (p = (*secpp)->link_order_head; p != NULL; p = p->next) |
| 1904 | if (p->type == bfd_indirect_link_order) |
| 1905 | p->u.indirect.section->flags &=~ SEC_HAS_CONTENTS; |
| 1906 | (*secpp)->link_order_head = NULL; |
| 1907 | *secpp = (*secpp)->next; |
| 1908 | --abfd->section_count; |
| 1909 | break; |
| 1910 | } |
| 1911 | } |
| 1912 | |
| 1913 | /* Go through the sections and collect the .reginfo and .mdebug |
| 1914 | information. */ |
| 1915 | reginfo_sec = NULL; |
| 1916 | mdebug_sec = NULL; |
| 1917 | gptab_data_sec = NULL; |
| 1918 | gptab_bss_sec = NULL; |
| 1919 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
| 1920 | { |
| 1921 | if (strcmp (o->name, ".reginfo") == 0) |
| 1922 | { |
| 1923 | memset (®info, 0, sizeof reginfo); |
| 1924 | |
| 1925 | /* We have found the .reginfo section in the output file. |
| 1926 | Look through all the link_orders comprising it and merge |
| 1927 | the information together. */ |
| 1928 | for (p = o->link_order_head; |
| 1929 | p != (struct bfd_link_order *) NULL; |
| 1930 | p = p->next) |
| 1931 | { |
| 1932 | asection *input_section; |
| 1933 | bfd *input_bfd; |
| 1934 | Elf32_External_RegInfo ext; |
| 1935 | Elf32_RegInfo sub; |
| 1936 | |
| 1937 | if (p->type != bfd_indirect_link_order) |
| 1938 | { |
| 1939 | if (p->type == bfd_fill_link_order) |
| 1940 | continue; |
| 1941 | abort (); |
| 1942 | } |
| 1943 | |
| 1944 | input_section = p->u.indirect.section; |
| 1945 | input_bfd = input_section->owner; |
| 1946 | |
| 1947 | /* The linker emulation code has probably clobbered the |
| 1948 | size to be zero bytes. */ |
| 1949 | if (input_section->_raw_size == 0) |
| 1950 | input_section->_raw_size = sizeof (Elf32_External_RegInfo); |
| 1951 | |
| 1952 | if (! bfd_get_section_contents (input_bfd, input_section, |
| 1953 | (PTR) &ext, |
| 1954 | (file_ptr) 0, |
| 1955 | sizeof ext)) |
| 1956 | return false; |
| 1957 | |
| 1958 | bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub); |
| 1959 | |
| 1960 | reginfo.ri_gprmask |= sub.ri_gprmask; |
| 1961 | reginfo.ri_cprmask[0] |= sub.ri_cprmask[0]; |
| 1962 | reginfo.ri_cprmask[1] |= sub.ri_cprmask[1]; |
| 1963 | reginfo.ri_cprmask[2] |= sub.ri_cprmask[2]; |
| 1964 | reginfo.ri_cprmask[3] |= sub.ri_cprmask[3]; |
| 1965 | |
| 1966 | /* ri_gp_value is set by the function |
| 1967 | mips_elf_section_processing when the section is |
| 1968 | finally written out. */ |
| 1969 | |
| 1970 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 1971 | elf_link_input_bfd ignores this section. */ |
| 1972 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 1973 | } |
| 1974 | |
| 1975 | /* Force the section size to the value we want. */ |
| 1976 | o->_raw_size = sizeof (Elf32_External_RegInfo); |
| 1977 | |
| 1978 | /* Skip this section later on (I don't think this currently |
| 1979 | matters, but someday it might). */ |
| 1980 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 1981 | |
| 1982 | reginfo_sec = o; |
| 1983 | } |
| 1984 | |
| 1985 | if (strcmp (o->name, ".mdebug") == 0) |
| 1986 | { |
| 1987 | struct extsym_info einfo; |
| 1988 | |
| 1989 | /* We have found the .mdebug section in the output file. |
| 1990 | Look through all the link_orders comprising it and merge |
| 1991 | the information together. */ |
| 1992 | symhdr->magic = swap->sym_magic; |
| 1993 | /* FIXME: What should the version stamp be? */ |
| 1994 | symhdr->vstamp = 0; |
| 1995 | symhdr->ilineMax = 0; |
| 1996 | symhdr->cbLine = 0; |
| 1997 | symhdr->idnMax = 0; |
| 1998 | symhdr->ipdMax = 0; |
| 1999 | symhdr->isymMax = 0; |
| 2000 | symhdr->ioptMax = 0; |
| 2001 | symhdr->iauxMax = 0; |
| 2002 | symhdr->issMax = 0; |
| 2003 | symhdr->issExtMax = 0; |
| 2004 | symhdr->ifdMax = 0; |
| 2005 | symhdr->crfd = 0; |
| 2006 | symhdr->iextMax = 0; |
| 2007 | |
| 2008 | /* We accumulate the debugging information itself in the |
| 2009 | debug_info structure. */ |
| 2010 | debug.line = NULL; |
| 2011 | debug.external_dnr = NULL; |
| 2012 | debug.external_pdr = NULL; |
| 2013 | debug.external_sym = NULL; |
| 2014 | debug.external_opt = NULL; |
| 2015 | debug.external_aux = NULL; |
| 2016 | debug.ss = NULL; |
| 2017 | debug.ssext = debug.ssext_end = NULL; |
| 2018 | debug.external_fdr = NULL; |
| 2019 | debug.external_rfd = NULL; |
| 2020 | debug.external_ext = debug.external_ext_end = NULL; |
| 2021 | |
| 2022 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); |
| 2023 | if (mdebug_handle == (PTR) NULL) |
| 2024 | return false; |
| 2025 | |
| 2026 | for (p = o->link_order_head; |
| 2027 | p != (struct bfd_link_order *) NULL; |
| 2028 | p = p->next) |
| 2029 | { |
| 2030 | asection *input_section; |
| 2031 | bfd *input_bfd; |
| 2032 | const struct ecoff_debug_swap *input_swap; |
| 2033 | struct ecoff_debug_info input_debug; |
| 2034 | char *eraw_src; |
| 2035 | char *eraw_end; |
| 2036 | |
| 2037 | if (p->type != bfd_indirect_link_order) |
| 2038 | { |
| 2039 | if (p->type == bfd_fill_link_order) |
| 2040 | continue; |
| 2041 | abort (); |
| 2042 | } |
| 2043 | |
| 2044 | input_section = p->u.indirect.section; |
| 2045 | input_bfd = input_section->owner; |
| 2046 | |
| 2047 | if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour |
| 2048 | || (get_elf_backend_data (input_bfd) |
| 2049 | ->elf_backend_ecoff_debug_swap) == NULL) |
| 2050 | { |
| 2051 | /* I don't know what a non MIPS ELF bfd would be |
| 2052 | doing with a .mdebug section, but I don't really |
| 2053 | want to deal with it. */ |
| 2054 | continue; |
| 2055 | } |
| 2056 | |
| 2057 | input_swap = (get_elf_backend_data (input_bfd) |
| 2058 | ->elf_backend_ecoff_debug_swap); |
| 2059 | |
| 2060 | BFD_ASSERT (p->size == input_section->_raw_size); |
| 2061 | |
| 2062 | /* The ECOFF linking code expects that we have already |
| 2063 | read in the debugging information and set up an |
| 2064 | ecoff_debug_info structure, so we do that now. */ |
| 2065 | if (! mips_elf_read_ecoff_info (input_bfd, input_section, |
| 2066 | &input_debug)) |
| 2067 | return false; |
| 2068 | |
| 2069 | if (! (bfd_ecoff_debug_accumulate |
| 2070 | (mdebug_handle, abfd, &debug, swap, input_bfd, |
| 2071 | &input_debug, input_swap, info))) |
| 2072 | return false; |
| 2073 | |
| 2074 | /* Loop through the external symbols. For each one with |
| 2075 | interesting information, try to find the symbol in |
| 2076 | the linker global hash table and save the information |
| 2077 | for the output external symbols. */ |
| 2078 | eraw_src = input_debug.external_ext; |
| 2079 | eraw_end = (eraw_src |
| 2080 | + (input_debug.symbolic_header.iextMax |
| 2081 | * input_swap->external_ext_size)); |
| 2082 | for (; |
| 2083 | eraw_src < eraw_end; |
| 2084 | eraw_src += input_swap->external_ext_size) |
| 2085 | { |
| 2086 | EXTR ext; |
| 2087 | const char *name; |
| 2088 | struct mips_elf_link_hash_entry *h; |
| 2089 | |
| 2090 | (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext); |
| 2091 | if (ext.asym.sc == scNil |
| 2092 | || ext.asym.sc == scUndefined |
| 2093 | || ext.asym.sc == scSUndefined) |
| 2094 | continue; |
| 2095 | |
| 2096 | name = input_debug.ssext + ext.asym.iss; |
| 2097 | h = mips_elf_link_hash_lookup (mips_elf_hash_table (info), |
| 2098 | name, false, false, true); |
| 2099 | if (h == NULL || h->esym.ifd != -2) |
| 2100 | continue; |
| 2101 | |
| 2102 | if (ext.ifd != -1) |
| 2103 | { |
| 2104 | BFD_ASSERT (ext.ifd |
| 2105 | < input_debug.symbolic_header.ifdMax); |
| 2106 | ext.ifd = input_debug.ifdmap[ext.ifd]; |
| 2107 | } |
| 2108 | |
| 2109 | h->esym = ext; |
| 2110 | } |
| 2111 | |
| 2112 | /* Free up the information we just read. */ |
| 2113 | free (input_debug.line); |
| 2114 | free (input_debug.external_dnr); |
| 2115 | free (input_debug.external_pdr); |
| 2116 | free (input_debug.external_sym); |
| 2117 | free (input_debug.external_opt); |
| 2118 | free (input_debug.external_aux); |
| 2119 | free (input_debug.ss); |
| 2120 | free (input_debug.ssext); |
| 2121 | free (input_debug.external_fdr); |
| 2122 | free (input_debug.external_rfd); |
| 2123 | free (input_debug.external_ext); |
| 2124 | |
| 2125 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 2126 | elf_link_input_bfd ignores this section. */ |
| 2127 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 2128 | } |
| 2129 | |
| 2130 | /* Build the external symbol information. */ |
| 2131 | einfo.abfd = abfd; |
| 2132 | einfo.info = info; |
| 2133 | einfo.debug = &debug; |
| 2134 | einfo.swap = swap; |
| 2135 | einfo.failed = false; |
| 2136 | mips_elf_link_hash_traverse (mips_elf_hash_table (info), |
| 2137 | mips_elf_output_extsym, |
| 2138 | (PTR) &einfo); |
| 2139 | if (einfo.failed) |
| 2140 | return false; |
| 2141 | |
| 2142 | /* Set the size of the .mdebug section. */ |
| 2143 | o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap); |
| 2144 | |
| 2145 | /* Skip this section later on (I don't think this currently |
| 2146 | matters, but someday it might). */ |
| 2147 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 2148 | |
| 2149 | mdebug_sec = o; |
| 2150 | } |
| 2151 | |
| 2152 | if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0) |
| 2153 | { |
| 2154 | const char *subname; |
| 2155 | unsigned int c; |
| 2156 | Elf32_gptab *tab; |
| 2157 | Elf32_External_gptab *ext_tab; |
| 2158 | unsigned int i; |
| 2159 | |
| 2160 | /* The .gptab.sdata and .gptab.sbss sections hold |
| 2161 | information describing how the small data area would |
| 2162 | change depending upon the -G switch. These sections |
| 2163 | not used in executables files. */ |
| 2164 | if (! info->relocateable) |
| 2165 | { |
| 2166 | asection **secpp; |
| 2167 | |
| 2168 | for (p = o->link_order_head; |
| 2169 | p != (struct bfd_link_order *) NULL; |
| 2170 | p = p->next) |
| 2171 | { |
| 2172 | asection *input_section; |
| 2173 | |
| 2174 | if (p->type != bfd_indirect_link_order) |
| 2175 | { |
| 2176 | if (p->type == bfd_fill_link_order) |
| 2177 | continue; |
| 2178 | abort (); |
| 2179 | } |
| 2180 | |
| 2181 | input_section = p->u.indirect.section; |
| 2182 | |
| 2183 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 2184 | elf_link_input_bfd ignores this section. */ |
| 2185 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 2186 | } |
| 2187 | |
| 2188 | /* Skip this section later on (I don't think this |
| 2189 | currently matters, but someday it might). */ |
| 2190 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 2191 | |
| 2192 | /* Really remove the section. */ |
| 2193 | for (secpp = &abfd->sections; |
| 2194 | *secpp != o; |
| 2195 | secpp = &(*secpp)->next) |
| 2196 | ; |
| 2197 | *secpp = (*secpp)->next; |
| 2198 | --abfd->section_count; |
| 2199 | |
| 2200 | continue; |
| 2201 | } |
| 2202 | |
| 2203 | /* There is one gptab for initialized data, and one for |
| 2204 | uninitialized data. */ |
| 2205 | if (strcmp (o->name, ".gptab.sdata") == 0) |
| 2206 | gptab_data_sec = o; |
| 2207 | else if (strcmp (o->name, ".gptab.sbss") == 0) |
| 2208 | gptab_bss_sec = o; |
| 2209 | else |
| 2210 | { |
| 2211 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 2212 | return false; |
| 2213 | } |
| 2214 | |
| 2215 | /* The linker script always combines .gptab.data and |
| 2216 | .gptab.sdata into .gptab.sdata, and likewise for |
| 2217 | .gptab.bss and .gptab.sbss. It is possible that there is |
| 2218 | no .sdata or .sbss section in the output file, in which |
| 2219 | case we must change the name of the output section. */ |
| 2220 | subname = o->name + sizeof ".gptab" - 1; |
| 2221 | if (bfd_get_section_by_name (abfd, subname) == NULL) |
| 2222 | { |
| 2223 | if (o == gptab_data_sec) |
| 2224 | o->name = ".gptab.data"; |
| 2225 | else |
| 2226 | o->name = ".gptab.bss"; |
| 2227 | subname = o->name + sizeof ".gptab" - 1; |
| 2228 | BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL); |
| 2229 | } |
| 2230 | |
| 2231 | /* Set up the first entry. */ |
| 2232 | c = 1; |
| 2233 | tab = (Elf32_gptab *) malloc (c * sizeof (Elf32_gptab)); |
| 2234 | if (tab == NULL) |
| 2235 | { |
| 2236 | bfd_set_error (bfd_error_no_memory); |
| 2237 | return false; |
| 2238 | } |
| 2239 | tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd); |
| 2240 | tab[0].gt_header.gt_unused = 0; |
| 2241 | |
| 2242 | /* Combine the input sections. */ |
| 2243 | for (p = o->link_order_head; |
| 2244 | p != (struct bfd_link_order *) NULL; |
| 2245 | p = p->next) |
| 2246 | { |
| 2247 | asection *input_section; |
| 2248 | bfd *input_bfd; |
| 2249 | bfd_size_type size; |
| 2250 | unsigned long last; |
| 2251 | bfd_size_type gpentry; |
| 2252 | |
| 2253 | if (p->type != bfd_indirect_link_order) |
| 2254 | { |
| 2255 | if (p->type == bfd_fill_link_order) |
| 2256 | continue; |
| 2257 | abort (); |
| 2258 | } |
| 2259 | |
| 2260 | input_section = p->u.indirect.section; |
| 2261 | input_bfd = input_section->owner; |
| 2262 | |
| 2263 | /* Combine the gptab entries for this input section one |
| 2264 | by one. We know that the input gptab entries are |
| 2265 | sorted by ascending -G value. */ |
| 2266 | size = bfd_section_size (input_bfd, input_section); |
| 2267 | last = 0; |
| 2268 | for (gpentry = sizeof (Elf32_External_gptab); |
| 2269 | gpentry < size; |
| 2270 | gpentry += sizeof (Elf32_External_gptab)) |
| 2271 | { |
| 2272 | Elf32_External_gptab ext_gptab; |
| 2273 | Elf32_gptab int_gptab; |
| 2274 | unsigned long val; |
| 2275 | unsigned long add; |
| 2276 | boolean exact; |
| 2277 | unsigned int look; |
| 2278 | |
| 2279 | if (! (bfd_get_section_contents |
| 2280 | (input_bfd, input_section, (PTR) &ext_gptab, |
| 2281 | gpentry, sizeof (Elf32_External_gptab)))) |
| 2282 | { |
| 2283 | free (tab); |
| 2284 | return false; |
| 2285 | } |
| 2286 | |
| 2287 | bfd_mips_elf32_swap_gptab_in (input_bfd, &ext_gptab, |
| 2288 | &int_gptab); |
| 2289 | val = int_gptab.gt_entry.gt_g_value; |
| 2290 | add = int_gptab.gt_entry.gt_bytes - last; |
| 2291 | |
| 2292 | exact = false; |
| 2293 | for (look = 1; look < c; look++) |
| 2294 | { |
| 2295 | if (tab[look].gt_entry.gt_g_value >= val) |
| 2296 | tab[look].gt_entry.gt_bytes += add; |
| 2297 | |
| 2298 | if (tab[look].gt_entry.gt_g_value == val) |
| 2299 | exact = true; |
| 2300 | } |
| 2301 | |
| 2302 | if (! exact) |
| 2303 | { |
| 2304 | Elf32_gptab *new_tab; |
| 2305 | unsigned int max; |
| 2306 | |
| 2307 | /* We need a new table entry. */ |
| 2308 | new_tab = ((Elf32_gptab *) |
| 2309 | realloc ((PTR) tab, |
| 2310 | (c + 1) * sizeof (Elf32_gptab))); |
| 2311 | if (new_tab == NULL) |
| 2312 | { |
| 2313 | bfd_set_error (bfd_error_no_memory); |
| 2314 | free (tab); |
| 2315 | return false; |
| 2316 | } |
| 2317 | tab = new_tab; |
| 2318 | tab[c].gt_entry.gt_g_value = val; |
| 2319 | tab[c].gt_entry.gt_bytes = add; |
| 2320 | |
| 2321 | /* Merge in the size for the next smallest -G |
| 2322 | value, since that will be implied by this new |
| 2323 | value. */ |
| 2324 | max = 0; |
| 2325 | for (look = 1; look < c; look++) |
| 2326 | { |
| 2327 | if (tab[look].gt_entry.gt_g_value < val |
| 2328 | && (max == 0 |
| 2329 | || (tab[look].gt_entry.gt_g_value |
| 2330 | > tab[max].gt_entry.gt_g_value))) |
| 2331 | max = look; |
| 2332 | } |
| 2333 | if (max != 0) |
| 2334 | tab[c].gt_entry.gt_bytes += |
| 2335 | tab[max].gt_entry.gt_bytes; |
| 2336 | |
| 2337 | ++c; |
| 2338 | } |
| 2339 | |
| 2340 | last = int_gptab.gt_entry.gt_bytes; |
| 2341 | } |
| 2342 | |
| 2343 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 2344 | elf_link_input_bfd ignores this section. */ |
| 2345 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 2346 | } |
| 2347 | |
| 2348 | /* The table must be sorted by -G value. */ |
| 2349 | if (c > 2) |
| 2350 | qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare); |
| 2351 | |
| 2352 | /* Swap out the table. */ |
| 2353 | ext_tab = ((Elf32_External_gptab *) |
| 2354 | bfd_alloc (abfd, c * sizeof (Elf32_External_gptab))); |
| 2355 | if (ext_tab == NULL) |
| 2356 | { |
| 2357 | bfd_set_error (bfd_error_no_memory); |
| 2358 | free (tab); |
| 2359 | return false; |
| 2360 | } |
| 2361 | |
| 2362 | for (i = 0; i < c; i++) |
| 2363 | bfd_mips_elf32_swap_gptab_out (abfd, tab + i, ext_tab + i); |
| 2364 | free (tab); |
| 2365 | |
| 2366 | o->_raw_size = c * sizeof (Elf32_External_gptab); |
| 2367 | o->contents = (bfd_byte *) ext_tab; |
| 2368 | |
| 2369 | /* Skip this section later on (I don't think this currently |
| 2370 | matters, but someday it might). */ |
| 2371 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 2372 | } |
| 2373 | } |
| 2374 | |
| 2375 | /* Get a value for the GP register. */ |
| 2376 | if (elf_gp (abfd) == 0) |
| 2377 | { |
| 2378 | struct bfd_link_hash_entry *h; |
| 2379 | |
| 2380 | h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true); |
| 2381 | if (h != (struct bfd_link_hash_entry *) NULL |
| 2382 | && h->type == bfd_link_hash_defined) |
| 2383 | elf_gp (abfd) = (h->u.def.value |
| 2384 | + h->u.def.section->output_section->vma |
| 2385 | + h->u.def.section->output_offset); |
| 2386 | else if (info->relocateable) |
| 2387 | { |
| 2388 | bfd_vma lo; |
| 2389 | |
| 2390 | /* Make up a value. */ |
| 2391 | lo = (bfd_vma) -1; |
| 2392 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
| 2393 | { |
| 2394 | if (o->vma < lo |
| 2395 | && (strcmp (o->name, ".sbss") == 0 |
| 2396 | || strcmp (o->name, ".sdata") == 0 |
| 2397 | || strcmp (o->name, ".lit4") == 0 |
| 2398 | || strcmp (o->name, ".lit8") == 0)) |
| 2399 | lo = o->vma; |
| 2400 | } |
| 2401 | elf_gp (abfd) = lo + 0x8000; |
| 2402 | } |
| 2403 | else |
| 2404 | { |
| 2405 | /* If the relocate_section function needs to do a reloc |
| 2406 | involving the GP value, it should make a reloc_dangerous |
| 2407 | callback to warn that GP is not defined. */ |
| 2408 | } |
| 2409 | } |
| 2410 | |
| 2411 | /* Invoke the regular ELF backend linker to do all the work. */ |
| 2412 | if (! bfd_elf32_bfd_final_link (abfd, info)) |
| 2413 | return false; |
| 2414 | |
| 2415 | /* Now write out the computed sections. */ |
| 2416 | |
| 2417 | if (reginfo_sec != (asection *) NULL) |
| 2418 | { |
| 2419 | Elf32_External_RegInfo ext; |
| 2420 | |
| 2421 | bfd_mips_elf32_swap_reginfo_out (abfd, ®info, &ext); |
| 2422 | if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext, |
| 2423 | (file_ptr) 0, sizeof ext)) |
| 2424 | return false; |
| 2425 | } |
| 2426 | |
| 2427 | if (mdebug_sec != (asection *) NULL) |
| 2428 | { |
| 2429 | BFD_ASSERT (abfd->output_has_begun); |
| 2430 | if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, |
| 2431 | swap, info, |
| 2432 | mdebug_sec->filepos)) |
| 2433 | return false; |
| 2434 | |
| 2435 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); |
| 2436 | } |
| 2437 | |
| 2438 | if (gptab_data_sec != (asection *) NULL) |
| 2439 | { |
| 2440 | if (! bfd_set_section_contents (abfd, gptab_data_sec, |
| 2441 | gptab_data_sec->contents, |
| 2442 | (file_ptr) 0, |
| 2443 | gptab_data_sec->_raw_size)) |
| 2444 | return false; |
| 2445 | } |
| 2446 | |
| 2447 | if (gptab_bss_sec != (asection *) NULL) |
| 2448 | { |
| 2449 | if (! bfd_set_section_contents (abfd, gptab_bss_sec, |
| 2450 | gptab_bss_sec->contents, |
| 2451 | (file_ptr) 0, |
| 2452 | gptab_bss_sec->_raw_size)) |
| 2453 | return false; |
| 2454 | } |
| 2455 | |
| 2456 | return true; |
| 2457 | } |
| 2458 | |
| 2459 | /* Handle a MIPS ELF HI16 reloc. */ |
| 2460 | |
| 2461 | static void |
| 2462 | mips_elf_relocate_hi16 (input_bfd, relhi, rello, contents, addend) |
| 2463 | bfd *input_bfd; |
| 2464 | Elf_Internal_Rela *relhi; |
| 2465 | Elf_Internal_Rela *rello; |
| 2466 | bfd_byte *contents; |
| 2467 | bfd_vma addend; |
| 2468 | { |
| 2469 | bfd_vma insn; |
| 2470 | bfd_vma addlo; |
| 2471 | |
| 2472 | insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); |
| 2473 | |
| 2474 | addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); |
| 2475 | addlo &= 0xffff; |
| 2476 | |
| 2477 | addend += ((insn & 0xffff) << 16) + addlo; |
| 2478 | |
| 2479 | if ((addlo & 0x8000) != 0) |
| 2480 | addend -= 0x10000; |
| 2481 | if ((addend & 0x8000) != 0) |
| 2482 | addend += 0x10000; |
| 2483 | |
| 2484 | bfd_put_32 (input_bfd, |
| 2485 | (insn & 0xffff0000) | ((addend >> 16) & 0xffff), |
| 2486 | contents + relhi->r_offset); |
| 2487 | } |
| 2488 | |
| 2489 | /* Relocate a MIPS ELF section. */ |
| 2490 | |
| 2491 | static boolean |
| 2492 | mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| 2493 | contents, relocs, local_syms, local_sections) |
| 2494 | bfd *output_bfd; |
| 2495 | struct bfd_link_info *info; |
| 2496 | bfd *input_bfd; |
| 2497 | asection *input_section; |
| 2498 | bfd_byte *contents; |
| 2499 | Elf_Internal_Rela *relocs; |
| 2500 | Elf_Internal_Sym *local_syms; |
| 2501 | asection **local_sections; |
| 2502 | { |
| 2503 | Elf_Internal_Shdr *symtab_hdr; |
| 2504 | size_t locsymcount; |
| 2505 | size_t extsymoff; |
| 2506 | Elf_Internal_Rela *rel; |
| 2507 | Elf_Internal_Rela *relend; |
| 2508 | |
| 2509 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2510 | |
| 2511 | if (elf_bad_symtab (input_bfd)) |
| 2512 | { |
| 2513 | locsymcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
| 2514 | extsymoff = 0; |
| 2515 | } |
| 2516 | else |
| 2517 | { |
| 2518 | locsymcount = symtab_hdr->sh_info; |
| 2519 | extsymoff = symtab_hdr->sh_info; |
| 2520 | } |
| 2521 | |
| 2522 | rel = relocs; |
| 2523 | relend = relocs + input_section->reloc_count; |
| 2524 | for (; rel < relend; rel++) |
| 2525 | { |
| 2526 | int r_type; |
| 2527 | reloc_howto_type *howto; |
| 2528 | long r_symndx; |
| 2529 | bfd_vma addend; |
| 2530 | struct elf_link_hash_entry *h; |
| 2531 | asection *sec; |
| 2532 | Elf_Internal_Sym *sym; |
| 2533 | bfd_reloc_status_type r; |
| 2534 | |
| 2535 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2536 | if (r_type < 0 || r_type >= (int) R_MIPS_max) |
| 2537 | { |
| 2538 | bfd_set_error (bfd_error_bad_value); |
| 2539 | return false; |
| 2540 | } |
| 2541 | howto = elf_mips_howto_table + r_type; |
| 2542 | |
| 2543 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2544 | |
| 2545 | /* Mix in the change in GP address for a GP relative reloc. */ |
| 2546 | if (r_type != R_MIPS_GPREL16 |
| 2547 | && r_type != R_MIPS_LITERAL |
| 2548 | && r_type != R_MIPS_GPREL32) |
| 2549 | addend = 0; |
| 2550 | else |
| 2551 | { |
| 2552 | if (elf_gp (output_bfd) == 0) |
| 2553 | { |
| 2554 | if (! ((*info->callbacks->reloc_dangerous) |
| 2555 | (info, |
| 2556 | "GP relative relocation when GP not defined", |
| 2557 | input_bfd, input_section, |
| 2558 | rel->r_offset))) |
| 2559 | return false; |
| 2560 | /* Only give the error once per link. */ |
| 2561 | elf_gp (output_bfd) = 4; |
| 2562 | } |
| 2563 | |
| 2564 | if (r_symndx < extsymoff |
| 2565 | || (elf_bad_symtab (input_bfd) |
| 2566 | && local_sections[r_symndx] != NULL)) |
| 2567 | { |
| 2568 | /* This is a relocation against a section. The current |
| 2569 | addend in the instruction is the difference between |
| 2570 | INPUT_SECTION->vma and the GP value of INPUT_BFD. We |
| 2571 | must change this to be the difference between the |
| 2572 | final definition (which will end up in RELOCATION) |
| 2573 | and the GP value of OUTPUT_BFD (which is in GP). */ |
| 2574 | addend = elf_gp (input_bfd) - elf_gp (output_bfd); |
| 2575 | } |
| 2576 | else if (! info->relocateable) |
| 2577 | { |
| 2578 | /* We are doing a final link. The current addend in the |
| 2579 | instruction is simply the desired offset into the |
| 2580 | symbol (normally zero). We want the instruction to |
| 2581 | hold the difference between the final definition of |
| 2582 | the symbol (which will end up in RELOCATION) and the |
| 2583 | GP value of OUTPUT_BFD (which is in GP). */ |
| 2584 | addend = - elf_gp (output_bfd); |
| 2585 | } |
| 2586 | else |
| 2587 | { |
| 2588 | /* We are generating relocateable output, and we aren't |
| 2589 | going to define this symbol, so we just leave the |
| 2590 | instruction alone. */ |
| 2591 | addend = 0; |
| 2592 | } |
| 2593 | } |
| 2594 | |
| 2595 | h = NULL; |
| 2596 | sym = NULL; |
| 2597 | sec = NULL; |
| 2598 | if (info->relocateable) |
| 2599 | { |
| 2600 | /* This is a relocateable link. We don't have to change |
| 2601 | anything, unless the reloc is against a section symbol, |
| 2602 | in which case we have to adjust according to where the |
| 2603 | section symbol winds up in the output section. */ |
| 2604 | if (r_symndx >= locsymcount |
| 2605 | || (elf_bad_symtab (input_bfd) |
| 2606 | && local_sections[r_symndx] == NULL)) |
| 2607 | r = bfd_reloc_ok; |
| 2608 | else |
| 2609 | { |
| 2610 | sym = local_syms + r_symndx; |
| 2611 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 2612 | r = bfd_reloc_ok; |
| 2613 | else |
| 2614 | { |
| 2615 | sec = local_sections[r_symndx]; |
| 2616 | |
| 2617 | /* It would be logical to add sym->st_value here, |
| 2618 | but Irix 5 sometimes generates a garbage symbol |
| 2619 | value. */ |
| 2620 | addend += sec->output_offset; |
| 2621 | |
| 2622 | /* If this is HI16 with an associated LO16, adjust |
| 2623 | the addend accordingly. Otherwise, just |
| 2624 | relocate. */ |
| 2625 | if (r_type != R_MIPS_HI16 |
| 2626 | || (rel + 1) >= relend |
| 2627 | || ELF32_R_TYPE ((rel + 1)->r_info) != R_MIPS_LO16) |
| 2628 | r = _bfd_relocate_contents (howto, input_bfd, |
| 2629 | addend, |
| 2630 | contents + rel->r_offset); |
| 2631 | else |
| 2632 | { |
| 2633 | mips_elf_relocate_hi16 (input_bfd, rel, rel + 1, |
| 2634 | contents, addend); |
| 2635 | r = bfd_reloc_ok; |
| 2636 | } |
| 2637 | } |
| 2638 | } |
| 2639 | } |
| 2640 | else |
| 2641 | { |
| 2642 | bfd_vma relocation; |
| 2643 | |
| 2644 | /* This is a final link. */ |
| 2645 | sym = NULL; |
| 2646 | if (r_symndx < extsymoff |
| 2647 | || (elf_bad_symtab (input_bfd) |
| 2648 | && local_sections[r_symndx] != NULL)) |
| 2649 | { |
| 2650 | sym = local_syms + r_symndx; |
| 2651 | sec = local_sections[r_symndx]; |
| 2652 | relocation = (sec->output_section->vma |
| 2653 | + sec->output_offset); |
| 2654 | |
| 2655 | /* It would be logical to always add sym->st_value here, |
| 2656 | but Irix 5 sometimes generates a garbage symbol |
| 2657 | value. */ |
| 2658 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 2659 | relocation += sym->st_value; |
| 2660 | } |
| 2661 | else |
| 2662 | { |
| 2663 | long indx; |
| 2664 | |
| 2665 | indx = r_symndx - extsymoff; |
| 2666 | h = elf_sym_hashes (input_bfd)[indx]; |
| 2667 | if (h->root.type == bfd_link_hash_defined |
| 2668 | || h->root.type == bfd_link_hash_defweak) |
| 2669 | { |
| 2670 | sec = h->root.u.def.section; |
| 2671 | relocation = (h->root.u.def.value |
| 2672 | + sec->output_section->vma |
| 2673 | + sec->output_offset); |
| 2674 | } |
| 2675 | else if (h->root.type == bfd_link_hash_undefweak) |
| 2676 | relocation = 0; |
| 2677 | else |
| 2678 | { |
| 2679 | if (! ((*info->callbacks->undefined_symbol) |
| 2680 | (info, h->root.root.string, input_bfd, |
| 2681 | input_section, rel->r_offset))) |
| 2682 | return false; |
| 2683 | relocation = 0; |
| 2684 | } |
| 2685 | } |
| 2686 | |
| 2687 | if (r_type != R_MIPS_HI16 |
| 2688 | || (rel + 1) >= relend |
| 2689 | || ELF32_R_TYPE ((rel + 1)->r_info) != R_MIPS_LO16) |
| 2690 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 2691 | contents, rel->r_offset, |
| 2692 | relocation, addend); |
| 2693 | else |
| 2694 | { |
| 2695 | mips_elf_relocate_hi16 (input_bfd, rel, rel + 1, |
| 2696 | contents, relocation + addend); |
| 2697 | r = bfd_reloc_ok; |
| 2698 | } |
| 2699 | } |
| 2700 | |
| 2701 | if (r != bfd_reloc_ok) |
| 2702 | { |
| 2703 | switch (r) |
| 2704 | { |
| 2705 | default: |
| 2706 | case bfd_reloc_outofrange: |
| 2707 | abort (); |
| 2708 | case bfd_reloc_overflow: |
| 2709 | { |
| 2710 | const char *name; |
| 2711 | |
| 2712 | if (h != NULL) |
| 2713 | name = h->root.root.string; |
| 2714 | else |
| 2715 | { |
| 2716 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 2717 | symtab_hdr->sh_link, |
| 2718 | sym->st_name); |
| 2719 | if (name == NULL) |
| 2720 | return false; |
| 2721 | if (*name == '\0') |
| 2722 | name = bfd_section_name (input_bfd, sec); |
| 2723 | } |
| 2724 | if (! ((*info->callbacks->reloc_overflow) |
| 2725 | (info, name, howto->name, (bfd_vma) 0, |
| 2726 | input_bfd, input_section, rel->r_offset))) |
| 2727 | return false; |
| 2728 | } |
| 2729 | break; |
| 2730 | } |
| 2731 | } |
| 2732 | } |
| 2733 | |
| 2734 | return true; |
| 2735 | } |
| 2736 | \f |
| 2737 | /* This is almost identical to bfd_generic_get_... except that some |
| 2738 | MIPS relocations need to be handled specially. Sigh. */ |
| 2739 | static bfd_byte * |
| 2740 | elf32_mips_get_relocated_section_contents (abfd, link_info, link_order, data, |
| 2741 | relocateable, symbols) |
| 2742 | bfd *abfd; |
| 2743 | struct bfd_link_info *link_info; |
| 2744 | struct bfd_link_order *link_order; |
| 2745 | bfd_byte *data; |
| 2746 | boolean relocateable; |
| 2747 | asymbol **symbols; |
| 2748 | { |
| 2749 | /* Get enough memory to hold the stuff */ |
| 2750 | bfd *input_bfd = link_order->u.indirect.section->owner; |
| 2751 | asection *input_section = link_order->u.indirect.section; |
| 2752 | |
| 2753 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); |
| 2754 | arelent **reloc_vector = NULL; |
| 2755 | long reloc_count; |
| 2756 | |
| 2757 | if (reloc_size < 0) |
| 2758 | goto error_return; |
| 2759 | |
| 2760 | reloc_vector = (arelent **) malloc (reloc_size); |
| 2761 | if (reloc_vector == NULL && reloc_size != 0) |
| 2762 | { |
| 2763 | bfd_set_error (bfd_error_no_memory); |
| 2764 | goto error_return; |
| 2765 | } |
| 2766 | |
| 2767 | /* read in the section */ |
| 2768 | if (!bfd_get_section_contents (input_bfd, |
| 2769 | input_section, |
| 2770 | (PTR) data, |
| 2771 | 0, |
| 2772 | input_section->_raw_size)) |
| 2773 | goto error_return; |
| 2774 | |
| 2775 | /* We're not relaxing the section, so just copy the size info */ |
| 2776 | input_section->_cooked_size = input_section->_raw_size; |
| 2777 | input_section->reloc_done = true; |
| 2778 | |
| 2779 | reloc_count = bfd_canonicalize_reloc (input_bfd, |
| 2780 | input_section, |
| 2781 | reloc_vector, |
| 2782 | symbols); |
| 2783 | if (reloc_count < 0) |
| 2784 | goto error_return; |
| 2785 | |
| 2786 | if (reloc_count > 0) |
| 2787 | { |
| 2788 | arelent **parent; |
| 2789 | /* for mips */ |
| 2790 | int gp_found; |
| 2791 | bfd_vma gp = 0x12345678; /* initialize just to shut gcc up */ |
| 2792 | |
| 2793 | { |
| 2794 | struct bfd_hash_entry *h; |
| 2795 | struct bfd_link_hash_entry *lh; |
| 2796 | /* Skip all this stuff if we aren't mixing formats. */ |
| 2797 | if (abfd && input_bfd |
| 2798 | && abfd->xvec == input_bfd->xvec) |
| 2799 | lh = 0; |
| 2800 | else |
| 2801 | { |
| 2802 | h = bfd_hash_lookup (&link_info->hash->table, "_gp", false, false); |
| 2803 | lh = (struct bfd_link_hash_entry *) h; |
| 2804 | } |
| 2805 | lookup: |
| 2806 | if (lh) |
| 2807 | { |
| 2808 | switch (lh->type) |
| 2809 | { |
| 2810 | case bfd_link_hash_undefined: |
| 2811 | case bfd_link_hash_undefweak: |
| 2812 | case bfd_link_hash_common: |
| 2813 | gp_found = 0; |
| 2814 | break; |
| 2815 | case bfd_link_hash_defined: |
| 2816 | case bfd_link_hash_defweak: |
| 2817 | gp_found = 1; |
| 2818 | gp = lh->u.def.value; |
| 2819 | break; |
| 2820 | case bfd_link_hash_indirect: |
| 2821 | case bfd_link_hash_warning: |
| 2822 | lh = lh->u.i.link; |
| 2823 | /* @@FIXME ignoring warning for now */ |
| 2824 | goto lookup; |
| 2825 | case bfd_link_hash_new: |
| 2826 | default: |
| 2827 | abort (); |
| 2828 | } |
| 2829 | } |
| 2830 | else |
| 2831 | gp_found = 0; |
| 2832 | } |
| 2833 | /* end mips */ |
| 2834 | for (parent = reloc_vector; *parent != (arelent *) NULL; |
| 2835 | parent++) |
| 2836 | { |
| 2837 | char *error_message = (char *) NULL; |
| 2838 | bfd_reloc_status_type r; |
| 2839 | |
| 2840 | /* Specific to MIPS: Deal with relocation types that require |
| 2841 | knowing the gp of the output bfd. */ |
| 2842 | asymbol *sym = *(*parent)->sym_ptr_ptr; |
| 2843 | if (bfd_is_abs_section (sym->section) && abfd) |
| 2844 | { |
| 2845 | /* The special_function wouldn't get called anyways. */ |
| 2846 | } |
| 2847 | else if (!gp_found) |
| 2848 | { |
| 2849 | /* The gp isn't there; let the special function code |
| 2850 | fall over on its own. */ |
| 2851 | } |
| 2852 | else if ((*parent)->howto->special_function == mips_elf_gprel16_reloc) |
| 2853 | { |
| 2854 | /* bypass special_function call */ |
| 2855 | r = gprel16_with_gp (input_bfd, sym, *parent, input_section, |
| 2856 | relocateable, (PTR) data, gp); |
| 2857 | goto skip_bfd_perform_relocation; |
| 2858 | } |
| 2859 | /* end mips specific stuff */ |
| 2860 | |
| 2861 | r = bfd_perform_relocation (input_bfd, |
| 2862 | *parent, |
| 2863 | (PTR) data, |
| 2864 | input_section, |
| 2865 | relocateable ? abfd : (bfd *) NULL, |
| 2866 | &error_message); |
| 2867 | skip_bfd_perform_relocation: |
| 2868 | |
| 2869 | if (relocateable) |
| 2870 | { |
| 2871 | asection *os = input_section->output_section; |
| 2872 | |
| 2873 | /* A partial link, so keep the relocs */ |
| 2874 | os->orelocation[os->reloc_count] = *parent; |
| 2875 | os->reloc_count++; |
| 2876 | } |
| 2877 | |
| 2878 | if (r != bfd_reloc_ok) |
| 2879 | { |
| 2880 | switch (r) |
| 2881 | { |
| 2882 | case bfd_reloc_undefined: |
| 2883 | if (!((*link_info->callbacks->undefined_symbol) |
| 2884 | (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), |
| 2885 | input_bfd, input_section, (*parent)->address))) |
| 2886 | goto error_return; |
| 2887 | break; |
| 2888 | case bfd_reloc_dangerous: |
| 2889 | BFD_ASSERT (error_message != (char *) NULL); |
| 2890 | if (!((*link_info->callbacks->reloc_dangerous) |
| 2891 | (link_info, error_message, input_bfd, input_section, |
| 2892 | (*parent)->address))) |
| 2893 | goto error_return; |
| 2894 | break; |
| 2895 | case bfd_reloc_overflow: |
| 2896 | if (!((*link_info->callbacks->reloc_overflow) |
| 2897 | (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), |
| 2898 | (*parent)->howto->name, (*parent)->addend, |
| 2899 | input_bfd, input_section, (*parent)->address))) |
| 2900 | goto error_return; |
| 2901 | break; |
| 2902 | case bfd_reloc_outofrange: |
| 2903 | default: |
| 2904 | abort (); |
| 2905 | break; |
| 2906 | } |
| 2907 | |
| 2908 | } |
| 2909 | } |
| 2910 | } |
| 2911 | if (reloc_vector != NULL) |
| 2912 | free (reloc_vector); |
| 2913 | return data; |
| 2914 | |
| 2915 | error_return: |
| 2916 | if (reloc_vector != NULL) |
| 2917 | free (reloc_vector); |
| 2918 | return NULL; |
| 2919 | } |
| 2920 | #define bfd_elf32_bfd_get_relocated_section_contents elf32_mips_get_relocated_section_contents |
| 2921 | \f |
| 2922 | /* ECOFF swapping routines. These are used when dealing with the |
| 2923 | .mdebug section, which is in the ECOFF debugging format. */ |
| 2924 | static const struct ecoff_debug_swap mips_elf_ecoff_debug_swap = |
| 2925 | { |
| 2926 | /* Symbol table magic number. */ |
| 2927 | magicSym, |
| 2928 | /* Alignment of debugging information. E.g., 4. */ |
| 2929 | 4, |
| 2930 | /* Sizes of external symbolic information. */ |
| 2931 | sizeof (struct hdr_ext), |
| 2932 | sizeof (struct dnr_ext), |
| 2933 | sizeof (struct pdr_ext), |
| 2934 | sizeof (struct sym_ext), |
| 2935 | sizeof (struct opt_ext), |
| 2936 | sizeof (struct fdr_ext), |
| 2937 | sizeof (struct rfd_ext), |
| 2938 | sizeof (struct ext_ext), |
| 2939 | /* Functions to swap in external symbolic data. */ |
| 2940 | ecoff_swap_hdr_in, |
| 2941 | ecoff_swap_dnr_in, |
| 2942 | ecoff_swap_pdr_in, |
| 2943 | ecoff_swap_sym_in, |
| 2944 | ecoff_swap_opt_in, |
| 2945 | ecoff_swap_fdr_in, |
| 2946 | ecoff_swap_rfd_in, |
| 2947 | ecoff_swap_ext_in, |
| 2948 | _bfd_ecoff_swap_tir_in, |
| 2949 | _bfd_ecoff_swap_rndx_in, |
| 2950 | /* Functions to swap out external symbolic data. */ |
| 2951 | ecoff_swap_hdr_out, |
| 2952 | ecoff_swap_dnr_out, |
| 2953 | ecoff_swap_pdr_out, |
| 2954 | ecoff_swap_sym_out, |
| 2955 | ecoff_swap_opt_out, |
| 2956 | ecoff_swap_fdr_out, |
| 2957 | ecoff_swap_rfd_out, |
| 2958 | ecoff_swap_ext_out, |
| 2959 | _bfd_ecoff_swap_tir_out, |
| 2960 | _bfd_ecoff_swap_rndx_out, |
| 2961 | /* Function to read in symbolic data. */ |
| 2962 | mips_elf_read_ecoff_info |
| 2963 | }; |
| 2964 | \f |
| 2965 | #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec |
| 2966 | #define TARGET_LITTLE_NAME "elf32-littlemips" |
| 2967 | #define TARGET_BIG_SYM bfd_elf32_bigmips_vec |
| 2968 | #define TARGET_BIG_NAME "elf32-bigmips" |
| 2969 | #define ELF_ARCH bfd_arch_mips |
| 2970 | #define ELF_MACHINE_CODE EM_MIPS |
| 2971 | #define ELF_MAXPAGESIZE 0x10000 |
| 2972 | #define elf_backend_collect true |
| 2973 | #define elf_info_to_howto 0 |
| 2974 | #define elf_info_to_howto_rel mips_info_to_howto_rel |
| 2975 | #define elf_backend_sym_is_global mips_elf_sym_is_global |
| 2976 | #define elf_backend_object_p mips_elf_object_p |
| 2977 | #define elf_backend_section_from_shdr mips_elf_section_from_shdr |
| 2978 | #define elf_backend_fake_sections mips_elf_fake_sections |
| 2979 | #define elf_backend_section_from_bfd_section \ |
| 2980 | mips_elf_section_from_bfd_section |
| 2981 | #define elf_backend_section_processing mips_elf_section_processing |
| 2982 | #define elf_backend_symbol_processing mips_elf_symbol_processing |
| 2983 | #define elf_backend_final_write_processing \ |
| 2984 | mips_elf_final_write_processing |
| 2985 | #define elf_backend_ecoff_debug_swap &mips_elf_ecoff_debug_swap |
| 2986 | |
| 2987 | #define bfd_elf32_bfd_is_local_label mips_elf_is_local_label |
| 2988 | #define bfd_elf32_find_nearest_line mips_elf_find_nearest_line |
| 2989 | |
| 2990 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 2991 | mips_elf_link_hash_table_create |
| 2992 | #define bfd_elf32_bfd_final_link mips_elf_final_link |
| 2993 | #define elf_backend_relocate_section mips_elf_relocate_section |
| 2994 | #define elf_backend_add_symbol_hook mips_elf_add_symbol_hook |
| 2995 | |
| 2996 | #include "elf32-target.h" |