| 1 | /* MIPS-specific support for 32-bit ELF |
| 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
| 3 | 2003, 2004, 2005 Free Software Foundation, Inc. |
| 4 | |
| 5 | Most of the information added by Ian Lance Taylor, Cygnus Support, |
| 6 | <ian@cygnus.com>. |
| 7 | N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC. |
| 8 | <mark@codesourcery.com> |
| 9 | Traditional MIPS targets support added by Koundinya.K, Dansk Data |
| 10 | Elektronik & Operations Research Group. <kk@ddeorg.soft.net> |
| 11 | |
| 12 | This file is part of BFD, the Binary File Descriptor library. |
| 13 | |
| 14 | This program is free software; you can redistribute it and/or modify |
| 15 | it under the terms of the GNU General Public License as published by |
| 16 | the Free Software Foundation; either version 2 of the License, or |
| 17 | (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, |
| 20 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | GNU General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 27 | |
| 28 | /* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly |
| 29 | different MIPS ELF from other targets. This matters when linking. |
| 30 | This file supports both, switching at runtime. */ |
| 31 | |
| 32 | #include "bfd.h" |
| 33 | #include "sysdep.h" |
| 34 | #include "libbfd.h" |
| 35 | #include "bfdlink.h" |
| 36 | #include "genlink.h" |
| 37 | #include "elf-bfd.h" |
| 38 | #include "elfxx-mips.h" |
| 39 | #include "elf/mips.h" |
| 40 | |
| 41 | /* Get the ECOFF swapping routines. */ |
| 42 | #include "coff/sym.h" |
| 43 | #include "coff/symconst.h" |
| 44 | #include "coff/internal.h" |
| 45 | #include "coff/ecoff.h" |
| 46 | #include "coff/mips.h" |
| 47 | #define ECOFF_SIGNED_32 |
| 48 | #include "ecoffswap.h" |
| 49 | |
| 50 | static bfd_reloc_status_type gprel32_with_gp |
| 51 | (bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma); |
| 52 | static bfd_reloc_status_type mips_elf_gprel32_reloc |
| 53 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 54 | static bfd_reloc_status_type mips32_64bit_reloc |
| 55 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 56 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
| 57 | (bfd *, bfd_reloc_code_real_type); |
| 58 | static reloc_howto_type *mips_elf32_rtype_to_howto |
| 59 | (unsigned int, bfd_boolean); |
| 60 | static void mips_info_to_howto_rel |
| 61 | (bfd *, arelent *, Elf_Internal_Rela *); |
| 62 | static void mips_info_to_howto_rela |
| 63 | (bfd *, arelent *, Elf_Internal_Rela *); |
| 64 | static bfd_boolean mips_elf_sym_is_global |
| 65 | (bfd *, asymbol *); |
| 66 | static bfd_boolean mips_elf32_object_p |
| 67 | (bfd *); |
| 68 | static bfd_boolean mips_elf_is_local_label_name |
| 69 | (bfd *, const char *); |
| 70 | static bfd_reloc_status_type mips16_jump_reloc |
| 71 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 72 | static bfd_reloc_status_type mips16_gprel_reloc |
| 73 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 74 | static bfd_reloc_status_type mips_elf_final_gp |
| 75 | (bfd *, asymbol *, bfd_boolean, char **, bfd_vma *); |
| 76 | static bfd_boolean mips_elf_assign_gp |
| 77 | (bfd *, bfd_vma *); |
| 78 | static bfd_boolean elf32_mips_grok_prstatus |
| 79 | (bfd *, Elf_Internal_Note *); |
| 80 | static bfd_boolean elf32_mips_grok_psinfo |
| 81 | (bfd *, Elf_Internal_Note *); |
| 82 | static irix_compat_t elf32_mips_irix_compat |
| 83 | (bfd *); |
| 84 | |
| 85 | extern const bfd_target bfd_elf32_bigmips_vec; |
| 86 | extern const bfd_target bfd_elf32_littlemips_vec; |
| 87 | |
| 88 | /* Nonzero if ABFD is using the N32 ABI. */ |
| 89 | #define ABI_N32_P(abfd) \ |
| 90 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0) |
| 91 | |
| 92 | /* Whether we are trying to be compatible with IRIX at all. */ |
| 93 | #define SGI_COMPAT(abfd) \ |
| 94 | (elf32_mips_irix_compat (abfd) != ict_none) |
| 95 | |
| 96 | /* The number of local .got entries we reserve. */ |
| 97 | #define MIPS_RESERVED_GOTNO (2) |
| 98 | |
| 99 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| 100 | from smaller values. Start with zero, widen, *then* decrement. */ |
| 101 | #define MINUS_ONE (((bfd_vma)0) - 1) |
| 102 | |
| 103 | /* The relocation table used for SHT_REL sections. */ |
| 104 | |
| 105 | static reloc_howto_type elf_mips_howto_table_rel[] = |
| 106 | { |
| 107 | /* No relocation. */ |
| 108 | HOWTO (R_MIPS_NONE, /* type */ |
| 109 | 0, /* rightshift */ |
| 110 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 111 | 0, /* bitsize */ |
| 112 | FALSE, /* pc_relative */ |
| 113 | 0, /* bitpos */ |
| 114 | complain_overflow_dont, /* complain_on_overflow */ |
| 115 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 116 | "R_MIPS_NONE", /* name */ |
| 117 | FALSE, /* partial_inplace */ |
| 118 | 0, /* src_mask */ |
| 119 | 0, /* dst_mask */ |
| 120 | FALSE), /* pcrel_offset */ |
| 121 | |
| 122 | /* 16 bit relocation. */ |
| 123 | HOWTO (R_MIPS_16, /* type */ |
| 124 | 0, /* rightshift */ |
| 125 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 126 | 16, /* bitsize */ |
| 127 | FALSE, /* pc_relative */ |
| 128 | 0, /* bitpos */ |
| 129 | complain_overflow_signed, /* complain_on_overflow */ |
| 130 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 131 | "R_MIPS_16", /* name */ |
| 132 | TRUE, /* partial_inplace */ |
| 133 | 0x0000ffff, /* src_mask */ |
| 134 | 0x0000ffff, /* dst_mask */ |
| 135 | FALSE), /* pcrel_offset */ |
| 136 | |
| 137 | /* 32 bit relocation. */ |
| 138 | HOWTO (R_MIPS_32, /* type */ |
| 139 | 0, /* rightshift */ |
| 140 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 141 | 32, /* bitsize */ |
| 142 | FALSE, /* pc_relative */ |
| 143 | 0, /* bitpos */ |
| 144 | complain_overflow_dont, /* complain_on_overflow */ |
| 145 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 146 | "R_MIPS_32", /* name */ |
| 147 | TRUE, /* partial_inplace */ |
| 148 | 0xffffffff, /* src_mask */ |
| 149 | 0xffffffff, /* dst_mask */ |
| 150 | FALSE), /* pcrel_offset */ |
| 151 | |
| 152 | /* 32 bit symbol relative relocation. */ |
| 153 | HOWTO (R_MIPS_REL32, /* type */ |
| 154 | 0, /* rightshift */ |
| 155 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 156 | 32, /* bitsize */ |
| 157 | FALSE, /* pc_relative */ |
| 158 | 0, /* bitpos */ |
| 159 | complain_overflow_dont, /* complain_on_overflow */ |
| 160 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 161 | "R_MIPS_REL32", /* name */ |
| 162 | TRUE, /* partial_inplace */ |
| 163 | 0xffffffff, /* src_mask */ |
| 164 | 0xffffffff, /* dst_mask */ |
| 165 | FALSE), /* pcrel_offset */ |
| 166 | |
| 167 | /* 26 bit jump address. */ |
| 168 | HOWTO (R_MIPS_26, /* type */ |
| 169 | 2, /* rightshift */ |
| 170 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 171 | 26, /* bitsize */ |
| 172 | FALSE, /* pc_relative */ |
| 173 | 0, /* bitpos */ |
| 174 | complain_overflow_dont, /* complain_on_overflow */ |
| 175 | /* This needs complex overflow |
| 176 | detection, because the upper four |
| 177 | bits must match the PC + 4. */ |
| 178 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 179 | "R_MIPS_26", /* name */ |
| 180 | TRUE, /* partial_inplace */ |
| 181 | 0x03ffffff, /* src_mask */ |
| 182 | 0x03ffffff, /* dst_mask */ |
| 183 | FALSE), /* pcrel_offset */ |
| 184 | |
| 185 | /* High 16 bits of symbol value. */ |
| 186 | HOWTO (R_MIPS_HI16, /* type */ |
| 187 | 16, /* rightshift */ |
| 188 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 189 | 16, /* bitsize */ |
| 190 | FALSE, /* pc_relative */ |
| 191 | 0, /* bitpos */ |
| 192 | complain_overflow_dont, /* complain_on_overflow */ |
| 193 | _bfd_mips_elf_hi16_reloc, /* special_function */ |
| 194 | "R_MIPS_HI16", /* name */ |
| 195 | TRUE, /* partial_inplace */ |
| 196 | 0x0000ffff, /* src_mask */ |
| 197 | 0x0000ffff, /* dst_mask */ |
| 198 | FALSE), /* pcrel_offset */ |
| 199 | |
| 200 | /* Low 16 bits of symbol value. */ |
| 201 | HOWTO (R_MIPS_LO16, /* type */ |
| 202 | 0, /* rightshift */ |
| 203 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 204 | 16, /* bitsize */ |
| 205 | FALSE, /* pc_relative */ |
| 206 | 0, /* bitpos */ |
| 207 | complain_overflow_dont, /* complain_on_overflow */ |
| 208 | _bfd_mips_elf_lo16_reloc, /* special_function */ |
| 209 | "R_MIPS_LO16", /* name */ |
| 210 | TRUE, /* partial_inplace */ |
| 211 | 0x0000ffff, /* src_mask */ |
| 212 | 0x0000ffff, /* dst_mask */ |
| 213 | FALSE), /* pcrel_offset */ |
| 214 | |
| 215 | /* GP relative reference. */ |
| 216 | HOWTO (R_MIPS_GPREL16, /* 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_signed, /* complain_on_overflow */ |
| 223 | _bfd_mips_elf32_gprel16_reloc, /* special_function */ |
| 224 | "R_MIPS_GPREL16", /* name */ |
| 225 | TRUE, /* partial_inplace */ |
| 226 | 0x0000ffff, /* src_mask */ |
| 227 | 0x0000ffff, /* dst_mask */ |
| 228 | FALSE), /* pcrel_offset */ |
| 229 | |
| 230 | /* Reference to literal section. */ |
| 231 | HOWTO (R_MIPS_LITERAL, /* 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_signed, /* complain_on_overflow */ |
| 238 | _bfd_mips_elf32_gprel16_reloc, /* special_function */ |
| 239 | "R_MIPS_LITERAL", /* name */ |
| 240 | TRUE, /* partial_inplace */ |
| 241 | 0x0000ffff, /* src_mask */ |
| 242 | 0x0000ffff, /* dst_mask */ |
| 243 | FALSE), /* pcrel_offset */ |
| 244 | |
| 245 | /* Reference to global offset table. */ |
| 246 | HOWTO (R_MIPS_GOT16, /* 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 | _bfd_mips_elf_got16_reloc, /* special_function */ |
| 254 | "R_MIPS_GOT16", /* name */ |
| 255 | TRUE, /* partial_inplace */ |
| 256 | 0x0000ffff, /* src_mask */ |
| 257 | 0x0000ffff, /* dst_mask */ |
| 258 | FALSE), /* pcrel_offset */ |
| 259 | |
| 260 | /* 16 bit PC relative reference. Note that the ABI document has a typo |
| 261 | and claims R_MIPS_PC16 to be not rightshifted, rendering it useless. |
| 262 | We do the right thing here. */ |
| 263 | HOWTO (R_MIPS_PC16, /* type */ |
| 264 | 2, /* rightshift */ |
| 265 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 266 | 16, /* bitsize */ |
| 267 | TRUE, /* pc_relative */ |
| 268 | 0, /* bitpos */ |
| 269 | complain_overflow_signed, /* complain_on_overflow */ |
| 270 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 271 | "R_MIPS_PC16", /* name */ |
| 272 | TRUE, /* partial_inplace */ |
| 273 | 0x0000ffff, /* src_mask */ |
| 274 | 0x0000ffff, /* dst_mask */ |
| 275 | TRUE), /* pcrel_offset */ |
| 276 | |
| 277 | /* 16 bit call through global offset table. */ |
| 278 | HOWTO (R_MIPS_CALL16, /* type */ |
| 279 | 0, /* rightshift */ |
| 280 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 281 | 16, /* bitsize */ |
| 282 | FALSE, /* pc_relative */ |
| 283 | 0, /* bitpos */ |
| 284 | complain_overflow_signed, /* complain_on_overflow */ |
| 285 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 286 | "R_MIPS_CALL16", /* name */ |
| 287 | TRUE, /* partial_inplace */ |
| 288 | 0x0000ffff, /* src_mask */ |
| 289 | 0x0000ffff, /* dst_mask */ |
| 290 | FALSE), /* pcrel_offset */ |
| 291 | |
| 292 | /* 32 bit GP relative reference. */ |
| 293 | HOWTO (R_MIPS_GPREL32, /* type */ |
| 294 | 0, /* rightshift */ |
| 295 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 296 | 32, /* bitsize */ |
| 297 | FALSE, /* pc_relative */ |
| 298 | 0, /* bitpos */ |
| 299 | complain_overflow_dont, /* complain_on_overflow */ |
| 300 | mips_elf_gprel32_reloc, /* special_function */ |
| 301 | "R_MIPS_GPREL32", /* name */ |
| 302 | TRUE, /* partial_inplace */ |
| 303 | 0xffffffff, /* src_mask */ |
| 304 | 0xffffffff, /* dst_mask */ |
| 305 | FALSE), /* pcrel_offset */ |
| 306 | |
| 307 | /* The remaining relocs are defined on Irix 5, although they are |
| 308 | not defined by the ABI. */ |
| 309 | EMPTY_HOWTO (13), |
| 310 | EMPTY_HOWTO (14), |
| 311 | EMPTY_HOWTO (15), |
| 312 | |
| 313 | /* A 5 bit shift field. */ |
| 314 | HOWTO (R_MIPS_SHIFT5, /* type */ |
| 315 | 0, /* rightshift */ |
| 316 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 317 | 5, /* bitsize */ |
| 318 | FALSE, /* pc_relative */ |
| 319 | 6, /* bitpos */ |
| 320 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 321 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 322 | "R_MIPS_SHIFT5", /* name */ |
| 323 | TRUE, /* partial_inplace */ |
| 324 | 0x000007c0, /* src_mask */ |
| 325 | 0x000007c0, /* dst_mask */ |
| 326 | FALSE), /* pcrel_offset */ |
| 327 | |
| 328 | /* A 6 bit shift field. */ |
| 329 | /* FIXME: This is not handled correctly; a special function is |
| 330 | needed to put the most significant bit in the right place. */ |
| 331 | HOWTO (R_MIPS_SHIFT6, /* type */ |
| 332 | 0, /* rightshift */ |
| 333 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 334 | 6, /* bitsize */ |
| 335 | FALSE, /* pc_relative */ |
| 336 | 6, /* bitpos */ |
| 337 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 338 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 339 | "R_MIPS_SHIFT6", /* name */ |
| 340 | TRUE, /* partial_inplace */ |
| 341 | 0x000007c4, /* src_mask */ |
| 342 | 0x000007c4, /* dst_mask */ |
| 343 | FALSE), /* pcrel_offset */ |
| 344 | |
| 345 | /* A 64 bit relocation. */ |
| 346 | HOWTO (R_MIPS_64, /* type */ |
| 347 | 0, /* rightshift */ |
| 348 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 349 | 64, /* bitsize */ |
| 350 | FALSE, /* pc_relative */ |
| 351 | 0, /* bitpos */ |
| 352 | complain_overflow_dont, /* complain_on_overflow */ |
| 353 | mips32_64bit_reloc, /* special_function */ |
| 354 | "R_MIPS_64", /* name */ |
| 355 | TRUE, /* partial_inplace */ |
| 356 | MINUS_ONE, /* src_mask */ |
| 357 | MINUS_ONE, /* dst_mask */ |
| 358 | FALSE), /* pcrel_offset */ |
| 359 | |
| 360 | /* Displacement in the global offset table. */ |
| 361 | HOWTO (R_MIPS_GOT_DISP, /* type */ |
| 362 | 0, /* rightshift */ |
| 363 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 364 | 16, /* bitsize */ |
| 365 | FALSE, /* pc_relative */ |
| 366 | 0, /* bitpos */ |
| 367 | complain_overflow_signed, /* complain_on_overflow */ |
| 368 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 369 | "R_MIPS_GOT_DISP", /* name */ |
| 370 | TRUE, /* partial_inplace */ |
| 371 | 0x0000ffff, /* src_mask */ |
| 372 | 0x0000ffff, /* dst_mask */ |
| 373 | FALSE), /* pcrel_offset */ |
| 374 | |
| 375 | /* Displacement to page pointer in the global offset table. */ |
| 376 | HOWTO (R_MIPS_GOT_PAGE, /* type */ |
| 377 | 0, /* rightshift */ |
| 378 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 379 | 16, /* bitsize */ |
| 380 | FALSE, /* pc_relative */ |
| 381 | 0, /* bitpos */ |
| 382 | complain_overflow_signed, /* complain_on_overflow */ |
| 383 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 384 | "R_MIPS_GOT_PAGE", /* name */ |
| 385 | TRUE, /* partial_inplace */ |
| 386 | 0x0000ffff, /* src_mask */ |
| 387 | 0x0000ffff, /* dst_mask */ |
| 388 | FALSE), /* pcrel_offset */ |
| 389 | |
| 390 | /* Offset from page pointer in the global offset table. */ |
| 391 | HOWTO (R_MIPS_GOT_OFST, /* type */ |
| 392 | 0, /* rightshift */ |
| 393 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 394 | 16, /* bitsize */ |
| 395 | FALSE, /* pc_relative */ |
| 396 | 0, /* bitpos */ |
| 397 | complain_overflow_signed, /* complain_on_overflow */ |
| 398 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 399 | "R_MIPS_GOT_OFST", /* name */ |
| 400 | TRUE, /* partial_inplace */ |
| 401 | 0x0000ffff, /* src_mask */ |
| 402 | 0x0000ffff, /* dst_mask */ |
| 403 | FALSE), /* pcrel_offset */ |
| 404 | |
| 405 | /* High 16 bits of displacement in global offset table. */ |
| 406 | HOWTO (R_MIPS_GOT_HI16, /* type */ |
| 407 | 0, /* rightshift */ |
| 408 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 409 | 16, /* bitsize */ |
| 410 | FALSE, /* pc_relative */ |
| 411 | 0, /* bitpos */ |
| 412 | complain_overflow_dont, /* complain_on_overflow */ |
| 413 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 414 | "R_MIPS_GOT_HI16", /* name */ |
| 415 | TRUE, /* partial_inplace */ |
| 416 | 0x0000ffff, /* src_mask */ |
| 417 | 0x0000ffff, /* dst_mask */ |
| 418 | FALSE), /* pcrel_offset */ |
| 419 | |
| 420 | /* Low 16 bits of displacement in global offset table. */ |
| 421 | HOWTO (R_MIPS_GOT_LO16, /* type */ |
| 422 | 0, /* rightshift */ |
| 423 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 424 | 16, /* bitsize */ |
| 425 | FALSE, /* pc_relative */ |
| 426 | 0, /* bitpos */ |
| 427 | complain_overflow_dont, /* complain_on_overflow */ |
| 428 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 429 | "R_MIPS_GOT_LO16", /* name */ |
| 430 | TRUE, /* partial_inplace */ |
| 431 | 0x0000ffff, /* src_mask */ |
| 432 | 0x0000ffff, /* dst_mask */ |
| 433 | FALSE), /* pcrel_offset */ |
| 434 | |
| 435 | /* 64 bit subtraction. Used in the N32 ABI. */ |
| 436 | HOWTO (R_MIPS_SUB, /* type */ |
| 437 | 0, /* rightshift */ |
| 438 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 439 | 64, /* bitsize */ |
| 440 | FALSE, /* pc_relative */ |
| 441 | 0, /* bitpos */ |
| 442 | complain_overflow_dont, /* complain_on_overflow */ |
| 443 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 444 | "R_MIPS_SUB", /* name */ |
| 445 | TRUE, /* partial_inplace */ |
| 446 | MINUS_ONE, /* src_mask */ |
| 447 | MINUS_ONE, /* dst_mask */ |
| 448 | FALSE), /* pcrel_offset */ |
| 449 | |
| 450 | /* Used to cause the linker to insert and delete instructions? */ |
| 451 | EMPTY_HOWTO (R_MIPS_INSERT_A), |
| 452 | EMPTY_HOWTO (R_MIPS_INSERT_B), |
| 453 | EMPTY_HOWTO (R_MIPS_DELETE), |
| 454 | |
| 455 | /* Get the higher value of a 64 bit addend. */ |
| 456 | HOWTO (R_MIPS_HIGHER, /* type */ |
| 457 | 0, /* rightshift */ |
| 458 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 459 | 16, /* bitsize */ |
| 460 | FALSE, /* pc_relative */ |
| 461 | 0, /* bitpos */ |
| 462 | complain_overflow_dont, /* complain_on_overflow */ |
| 463 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 464 | "R_MIPS_HIGHER", /* name */ |
| 465 | TRUE, /* partial_inplace */ |
| 466 | 0x0000ffff, /* src_mask */ |
| 467 | 0x0000ffff, /* dst_mask */ |
| 468 | FALSE), /* pcrel_offset */ |
| 469 | |
| 470 | /* Get the highest value of a 64 bit addend. */ |
| 471 | HOWTO (R_MIPS_HIGHEST, /* type */ |
| 472 | 0, /* rightshift */ |
| 473 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 474 | 16, /* bitsize */ |
| 475 | FALSE, /* pc_relative */ |
| 476 | 0, /* bitpos */ |
| 477 | complain_overflow_dont, /* complain_on_overflow */ |
| 478 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 479 | "R_MIPS_HIGHEST", /* name */ |
| 480 | TRUE, /* partial_inplace */ |
| 481 | 0x0000ffff, /* src_mask */ |
| 482 | 0x0000ffff, /* dst_mask */ |
| 483 | FALSE), /* pcrel_offset */ |
| 484 | |
| 485 | /* High 16 bits of displacement in global offset table. */ |
| 486 | HOWTO (R_MIPS_CALL_HI16, /* type */ |
| 487 | 0, /* rightshift */ |
| 488 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 489 | 16, /* bitsize */ |
| 490 | FALSE, /* pc_relative */ |
| 491 | 0, /* bitpos */ |
| 492 | complain_overflow_dont, /* complain_on_overflow */ |
| 493 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 494 | "R_MIPS_CALL_HI16", /* name */ |
| 495 | TRUE, /* partial_inplace */ |
| 496 | 0x0000ffff, /* src_mask */ |
| 497 | 0x0000ffff, /* dst_mask */ |
| 498 | FALSE), /* pcrel_offset */ |
| 499 | |
| 500 | /* Low 16 bits of displacement in global offset table. */ |
| 501 | HOWTO (R_MIPS_CALL_LO16, /* type */ |
| 502 | 0, /* rightshift */ |
| 503 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 504 | 16, /* bitsize */ |
| 505 | FALSE, /* pc_relative */ |
| 506 | 0, /* bitpos */ |
| 507 | complain_overflow_dont, /* complain_on_overflow */ |
| 508 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 509 | "R_MIPS_CALL_LO16", /* name */ |
| 510 | TRUE, /* partial_inplace */ |
| 511 | 0x0000ffff, /* src_mask */ |
| 512 | 0x0000ffff, /* dst_mask */ |
| 513 | FALSE), /* pcrel_offset */ |
| 514 | |
| 515 | /* Section displacement. */ |
| 516 | HOWTO (R_MIPS_SCN_DISP, /* type */ |
| 517 | 0, /* rightshift */ |
| 518 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 519 | 32, /* bitsize */ |
| 520 | FALSE, /* pc_relative */ |
| 521 | 0, /* bitpos */ |
| 522 | complain_overflow_dont, /* complain_on_overflow */ |
| 523 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 524 | "R_MIPS_SCN_DISP", /* name */ |
| 525 | TRUE, /* partial_inplace */ |
| 526 | 0xffffffff, /* src_mask */ |
| 527 | 0xffffffff, /* dst_mask */ |
| 528 | FALSE), /* pcrel_offset */ |
| 529 | |
| 530 | EMPTY_HOWTO (R_MIPS_REL16), |
| 531 | EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE), |
| 532 | EMPTY_HOWTO (R_MIPS_PJUMP), |
| 533 | EMPTY_HOWTO (R_MIPS_RELGOT), |
| 534 | |
| 535 | /* Protected jump conversion. This is an optimization hint. No |
| 536 | relocation is required for correctness. */ |
| 537 | HOWTO (R_MIPS_JALR, /* type */ |
| 538 | 0, /* rightshift */ |
| 539 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 540 | 32, /* bitsize */ |
| 541 | FALSE, /* pc_relative */ |
| 542 | 0, /* bitpos */ |
| 543 | complain_overflow_dont, /* complain_on_overflow */ |
| 544 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 545 | "R_MIPS_JALR", /* name */ |
| 546 | FALSE, /* partial_inplace */ |
| 547 | 0x00000000, /* src_mask */ |
| 548 | 0x00000000, /* dst_mask */ |
| 549 | FALSE), /* pcrel_offset */ |
| 550 | |
| 551 | /* TLS GD/LD dynamic relocations. */ |
| 552 | HOWTO (R_MIPS_TLS_DTPMOD32, /* type */ |
| 553 | 0, /* rightshift */ |
| 554 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 555 | 32, /* bitsize */ |
| 556 | FALSE, /* pc_relative */ |
| 557 | 0, /* bitpos */ |
| 558 | complain_overflow_dont, /* complain_on_overflow */ |
| 559 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 560 | "R_MIPS_TLS_DTPMOD32", /* name */ |
| 561 | TRUE, /* partial_inplace */ |
| 562 | 0xffffffff, /* src_mask */ |
| 563 | 0xffffffff, /* dst_mask */ |
| 564 | FALSE), /* pcrel_offset */ |
| 565 | |
| 566 | HOWTO (R_MIPS_TLS_DTPREL32, /* type */ |
| 567 | 0, /* rightshift */ |
| 568 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 569 | 32, /* bitsize */ |
| 570 | FALSE, /* pc_relative */ |
| 571 | 0, /* bitpos */ |
| 572 | complain_overflow_dont, /* complain_on_overflow */ |
| 573 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 574 | "R_MIPS_TLS_DTPREL32", /* name */ |
| 575 | TRUE, /* partial_inplace */ |
| 576 | 0xffffffff, /* src_mask */ |
| 577 | 0xffffffff, /* dst_mask */ |
| 578 | FALSE), /* pcrel_offset */ |
| 579 | |
| 580 | EMPTY_HOWTO (R_MIPS_TLS_DTPMOD64), |
| 581 | EMPTY_HOWTO (R_MIPS_TLS_DTPREL64), |
| 582 | |
| 583 | /* TLS general dynamic variable reference. */ |
| 584 | HOWTO (R_MIPS_TLS_GD, /* type */ |
| 585 | 0, /* rightshift */ |
| 586 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 587 | 16, /* bitsize */ |
| 588 | FALSE, /* pc_relative */ |
| 589 | 0, /* bitpos */ |
| 590 | complain_overflow_signed, /* complain_on_overflow */ |
| 591 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 592 | "R_MIPS_TLS_GD", /* name */ |
| 593 | TRUE, /* partial_inplace */ |
| 594 | 0x0000ffff, /* src_mask */ |
| 595 | 0x0000ffff, /* dst_mask */ |
| 596 | FALSE), /* pcrel_offset */ |
| 597 | |
| 598 | /* TLS local dynamic variable reference. */ |
| 599 | HOWTO (R_MIPS_TLS_LDM, /* type */ |
| 600 | 0, /* rightshift */ |
| 601 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 602 | 16, /* bitsize */ |
| 603 | FALSE, /* pc_relative */ |
| 604 | 0, /* bitpos */ |
| 605 | complain_overflow_signed, /* complain_on_overflow */ |
| 606 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 607 | "R_MIPS_TLS_LDM", /* name */ |
| 608 | TRUE, /* partial_inplace */ |
| 609 | 0x0000ffff, /* src_mask */ |
| 610 | 0x0000ffff, /* dst_mask */ |
| 611 | FALSE), /* pcrel_offset */ |
| 612 | |
| 613 | /* TLS local dynamic offset. */ |
| 614 | HOWTO (R_MIPS_TLS_DTPREL_HI16, /* type */ |
| 615 | 0, /* rightshift */ |
| 616 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 617 | 16, /* bitsize */ |
| 618 | FALSE, /* pc_relative */ |
| 619 | 0, /* bitpos */ |
| 620 | complain_overflow_signed, /* complain_on_overflow */ |
| 621 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 622 | "R_MIPS_TLS_DTPREL_HI16", /* name */ |
| 623 | TRUE, /* partial_inplace */ |
| 624 | 0x0000ffff, /* src_mask */ |
| 625 | 0x0000ffff, /* dst_mask */ |
| 626 | FALSE), /* pcrel_offset */ |
| 627 | |
| 628 | /* TLS local dynamic offset. */ |
| 629 | HOWTO (R_MIPS_TLS_DTPREL_LO16, /* type */ |
| 630 | 0, /* rightshift */ |
| 631 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 632 | 16, /* bitsize */ |
| 633 | FALSE, /* pc_relative */ |
| 634 | 0, /* bitpos */ |
| 635 | complain_overflow_signed, /* complain_on_overflow */ |
| 636 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 637 | "R_MIPS_TLS_DTPREL_LO16", /* name */ |
| 638 | TRUE, /* partial_inplace */ |
| 639 | 0x0000ffff, /* src_mask */ |
| 640 | 0x0000ffff, /* dst_mask */ |
| 641 | FALSE), /* pcrel_offset */ |
| 642 | |
| 643 | /* TLS thread pointer offset. */ |
| 644 | HOWTO (R_MIPS_TLS_GOTTPREL, /* type */ |
| 645 | 0, /* rightshift */ |
| 646 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 647 | 16, /* bitsize */ |
| 648 | FALSE, /* pc_relative */ |
| 649 | 0, /* bitpos */ |
| 650 | complain_overflow_signed, /* complain_on_overflow */ |
| 651 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 652 | "R_MIPS_TLS_GOTTPREL", /* name */ |
| 653 | TRUE, /* partial_inplace */ |
| 654 | 0x0000ffff, /* src_mask */ |
| 655 | 0x0000ffff, /* dst_mask */ |
| 656 | FALSE), /* pcrel_offset */ |
| 657 | |
| 658 | /* TLS IE dynamic relocations. */ |
| 659 | HOWTO (R_MIPS_TLS_TPREL32, /* type */ |
| 660 | 0, /* rightshift */ |
| 661 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 662 | 32, /* bitsize */ |
| 663 | FALSE, /* pc_relative */ |
| 664 | 0, /* bitpos */ |
| 665 | complain_overflow_dont, /* complain_on_overflow */ |
| 666 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 667 | "R_MIPS_TLS_TPREL32", /* name */ |
| 668 | TRUE, /* partial_inplace */ |
| 669 | 0xffffffff, /* src_mask */ |
| 670 | 0xffffffff, /* dst_mask */ |
| 671 | FALSE), /* pcrel_offset */ |
| 672 | |
| 673 | EMPTY_HOWTO (R_MIPS_TLS_TPREL64), |
| 674 | |
| 675 | /* TLS thread pointer offset. */ |
| 676 | HOWTO (R_MIPS_TLS_TPREL_HI16, /* type */ |
| 677 | 0, /* rightshift */ |
| 678 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 679 | 16, /* bitsize */ |
| 680 | FALSE, /* pc_relative */ |
| 681 | 0, /* bitpos */ |
| 682 | complain_overflow_signed, /* complain_on_overflow */ |
| 683 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 684 | "R_MIPS_TLS_TPREL_HI16", /* name */ |
| 685 | TRUE, /* partial_inplace */ |
| 686 | 0x0000ffff, /* src_mask */ |
| 687 | 0x0000ffff, /* dst_mask */ |
| 688 | FALSE), /* pcrel_offset */ |
| 689 | |
| 690 | /* TLS thread pointer offset. */ |
| 691 | HOWTO (R_MIPS_TLS_TPREL_LO16, /* type */ |
| 692 | 0, /* rightshift */ |
| 693 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 694 | 16, /* bitsize */ |
| 695 | FALSE, /* pc_relative */ |
| 696 | 0, /* bitpos */ |
| 697 | complain_overflow_signed, /* complain_on_overflow */ |
| 698 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 699 | "R_MIPS_TLS_TPREL_LO16", /* name */ |
| 700 | TRUE, /* partial_inplace */ |
| 701 | 0x0000ffff, /* src_mask */ |
| 702 | 0x0000ffff, /* dst_mask */ |
| 703 | FALSE), /* pcrel_offset */ |
| 704 | }; |
| 705 | |
| 706 | /* The reloc used for BFD_RELOC_CTOR when doing a 64 bit link. This |
| 707 | is a hack to make the linker think that we need 64 bit values. */ |
| 708 | static reloc_howto_type elf_mips_ctor64_howto = |
| 709 | HOWTO (R_MIPS_64, /* type */ |
| 710 | 0, /* rightshift */ |
| 711 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 712 | 32, /* bitsize */ |
| 713 | FALSE, /* pc_relative */ |
| 714 | 0, /* bitpos */ |
| 715 | complain_overflow_signed, /* complain_on_overflow */ |
| 716 | mips32_64bit_reloc, /* special_function */ |
| 717 | "R_MIPS_64", /* name */ |
| 718 | TRUE, /* partial_inplace */ |
| 719 | 0xffffffff, /* src_mask */ |
| 720 | 0xffffffff, /* dst_mask */ |
| 721 | FALSE); /* pcrel_offset */ |
| 722 | |
| 723 | static reloc_howto_type elf_mips16_howto_table_rel[] = |
| 724 | { |
| 725 | /* The reloc used for the mips16 jump instruction. */ |
| 726 | HOWTO (R_MIPS16_26, /* type */ |
| 727 | 2, /* rightshift */ |
| 728 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 729 | 26, /* bitsize */ |
| 730 | FALSE, /* pc_relative */ |
| 731 | 0, /* bitpos */ |
| 732 | complain_overflow_dont, /* complain_on_overflow */ |
| 733 | /* This needs complex overflow |
| 734 | detection, because the upper four |
| 735 | bits must match the PC. */ |
| 736 | mips16_jump_reloc, /* special_function */ |
| 737 | "R_MIPS16_26", /* name */ |
| 738 | TRUE, /* partial_inplace */ |
| 739 | 0x3ffffff, /* src_mask */ |
| 740 | 0x3ffffff, /* dst_mask */ |
| 741 | FALSE), /* pcrel_offset */ |
| 742 | |
| 743 | /* The reloc used for the mips16 gprel instruction. */ |
| 744 | HOWTO (R_MIPS16_GPREL, /* type */ |
| 745 | 0, /* rightshift */ |
| 746 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 747 | 16, /* bitsize */ |
| 748 | FALSE, /* pc_relative */ |
| 749 | 0, /* bitpos */ |
| 750 | complain_overflow_signed, /* complain_on_overflow */ |
| 751 | mips16_gprel_reloc, /* special_function */ |
| 752 | "R_MIPS16_GPREL", /* name */ |
| 753 | TRUE, /* partial_inplace */ |
| 754 | 0x0000ffff, /* src_mask */ |
| 755 | 0x0000ffff, /* dst_mask */ |
| 756 | FALSE), /* pcrel_offset */ |
| 757 | |
| 758 | /* A placeholder for MIPS16 reference to global offset table. */ |
| 759 | EMPTY_HOWTO (R_MIPS16_GOT16), |
| 760 | |
| 761 | /* A placeholder for MIPS16 16 bit call through global offset table. */ |
| 762 | EMPTY_HOWTO (R_MIPS16_CALL16), |
| 763 | |
| 764 | /* MIPS16 high 16 bits of symbol value. */ |
| 765 | HOWTO (R_MIPS16_HI16, /* type */ |
| 766 | 16, /* rightshift */ |
| 767 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 768 | 16, /* bitsize */ |
| 769 | FALSE, /* pc_relative */ |
| 770 | 0, /* bitpos */ |
| 771 | complain_overflow_dont, /* complain_on_overflow */ |
| 772 | _bfd_mips_elf_hi16_reloc, /* special_function */ |
| 773 | "R_MIPS16_HI16", /* name */ |
| 774 | TRUE, /* partial_inplace */ |
| 775 | 0x0000ffff, /* src_mask */ |
| 776 | 0x0000ffff, /* dst_mask */ |
| 777 | FALSE), /* pcrel_offset */ |
| 778 | |
| 779 | /* MIPS16 low 16 bits of symbol value. */ |
| 780 | HOWTO (R_MIPS16_LO16, /* type */ |
| 781 | 0, /* rightshift */ |
| 782 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 783 | 16, /* bitsize */ |
| 784 | FALSE, /* pc_relative */ |
| 785 | 0, /* bitpos */ |
| 786 | complain_overflow_dont, /* complain_on_overflow */ |
| 787 | _bfd_mips_elf_lo16_reloc, /* special_function */ |
| 788 | "R_MIPS16_LO16", /* name */ |
| 789 | TRUE, /* partial_inplace */ |
| 790 | 0x0000ffff, /* src_mask */ |
| 791 | 0x0000ffff, /* dst_mask */ |
| 792 | FALSE), /* pcrel_offset */ |
| 793 | }; |
| 794 | |
| 795 | /* 16 bit offset for pc-relative branches. */ |
| 796 | static reloc_howto_type elf_mips_gnu_rel16_s2 = |
| 797 | HOWTO (R_MIPS_GNU_REL16_S2, /* type */ |
| 798 | 2, /* rightshift */ |
| 799 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 800 | 16, /* bitsize */ |
| 801 | TRUE, /* pc_relative */ |
| 802 | 0, /* bitpos */ |
| 803 | complain_overflow_signed, /* complain_on_overflow */ |
| 804 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 805 | "R_MIPS_GNU_REL16_S2", /* name */ |
| 806 | TRUE, /* partial_inplace */ |
| 807 | 0xffff, /* src_mask */ |
| 808 | 0xffff, /* dst_mask */ |
| 809 | TRUE); /* pcrel_offset */ |
| 810 | |
| 811 | /* 32 bit pc-relative. This was a GNU extension used by embedded-PIC. |
| 812 | It was co-opted by mips-linux for exception-handling data. It is no |
| 813 | longer used, but should continue to be supported by the linker for |
| 814 | backward compatibility. (GCC stopped using it in May, 2004.) */ |
| 815 | static reloc_howto_type elf_mips_gnu_pcrel32 = |
| 816 | HOWTO (R_MIPS_PC32, /* type */ |
| 817 | 0, /* rightshift */ |
| 818 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 819 | 32, /* bitsize */ |
| 820 | TRUE, /* pc_relative */ |
| 821 | 0, /* bitpos */ |
| 822 | complain_overflow_signed, /* complain_on_overflow */ |
| 823 | _bfd_mips_elf_generic_reloc, /* special_function */ |
| 824 | "R_MIPS_PC32", /* name */ |
| 825 | TRUE, /* partial_inplace */ |
| 826 | 0xffffffff, /* src_mask */ |
| 827 | 0xffffffff, /* dst_mask */ |
| 828 | TRUE); /* pcrel_offset */ |
| 829 | |
| 830 | /* GNU extension to record C++ vtable hierarchy */ |
| 831 | static reloc_howto_type elf_mips_gnu_vtinherit_howto = |
| 832 | HOWTO (R_MIPS_GNU_VTINHERIT, /* type */ |
| 833 | 0, /* rightshift */ |
| 834 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 835 | 0, /* bitsize */ |
| 836 | FALSE, /* pc_relative */ |
| 837 | 0, /* bitpos */ |
| 838 | complain_overflow_dont, /* complain_on_overflow */ |
| 839 | NULL, /* special_function */ |
| 840 | "R_MIPS_GNU_VTINHERIT", /* name */ |
| 841 | FALSE, /* partial_inplace */ |
| 842 | 0, /* src_mask */ |
| 843 | 0, /* dst_mask */ |
| 844 | FALSE); /* pcrel_offset */ |
| 845 | |
| 846 | /* GNU extension to record C++ vtable member usage */ |
| 847 | static reloc_howto_type elf_mips_gnu_vtentry_howto = |
| 848 | HOWTO (R_MIPS_GNU_VTENTRY, /* type */ |
| 849 | 0, /* rightshift */ |
| 850 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 851 | 0, /* bitsize */ |
| 852 | FALSE, /* pc_relative */ |
| 853 | 0, /* bitpos */ |
| 854 | complain_overflow_dont, /* complain_on_overflow */ |
| 855 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 856 | "R_MIPS_GNU_VTENTRY", /* name */ |
| 857 | FALSE, /* partial_inplace */ |
| 858 | 0, /* src_mask */ |
| 859 | 0, /* dst_mask */ |
| 860 | FALSE); /* pcrel_offset */ |
| 861 | |
| 862 | /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a |
| 863 | dangerous relocation. */ |
| 864 | |
| 865 | static bfd_boolean |
| 866 | mips_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) |
| 867 | { |
| 868 | unsigned int count; |
| 869 | asymbol **sym; |
| 870 | unsigned int i; |
| 871 | |
| 872 | /* If we've already figured out what GP will be, just return it. */ |
| 873 | *pgp = _bfd_get_gp_value (output_bfd); |
| 874 | if (*pgp) |
| 875 | return TRUE; |
| 876 | |
| 877 | count = bfd_get_symcount (output_bfd); |
| 878 | sym = bfd_get_outsymbols (output_bfd); |
| 879 | |
| 880 | /* The linker script will have created a symbol named `_gp' with the |
| 881 | appropriate value. */ |
| 882 | if (sym == NULL) |
| 883 | i = count; |
| 884 | else |
| 885 | { |
| 886 | for (i = 0; i < count; i++, sym++) |
| 887 | { |
| 888 | register const char *name; |
| 889 | |
| 890 | name = bfd_asymbol_name (*sym); |
| 891 | if (*name == '_' && strcmp (name, "_gp") == 0) |
| 892 | { |
| 893 | *pgp = bfd_asymbol_value (*sym); |
| 894 | _bfd_set_gp_value (output_bfd, *pgp); |
| 895 | break; |
| 896 | } |
| 897 | } |
| 898 | } |
| 899 | |
| 900 | if (i >= count) |
| 901 | { |
| 902 | /* Only get the error once. */ |
| 903 | *pgp = 4; |
| 904 | _bfd_set_gp_value (output_bfd, *pgp); |
| 905 | return FALSE; |
| 906 | } |
| 907 | |
| 908 | return TRUE; |
| 909 | } |
| 910 | |
| 911 | /* We have to figure out the gp value, so that we can adjust the |
| 912 | symbol value correctly. We look up the symbol _gp in the output |
| 913 | BFD. If we can't find it, we're stuck. We cache it in the ELF |
| 914 | target data. We don't need to adjust the symbol value for an |
| 915 | external symbol if we are producing relocatable output. */ |
| 916 | |
| 917 | static bfd_reloc_status_type |
| 918 | mips_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, |
| 919 | char **error_message, bfd_vma *pgp) |
| 920 | { |
| 921 | if (bfd_is_und_section (symbol->section) |
| 922 | && ! relocatable) |
| 923 | { |
| 924 | *pgp = 0; |
| 925 | return bfd_reloc_undefined; |
| 926 | } |
| 927 | |
| 928 | *pgp = _bfd_get_gp_value (output_bfd); |
| 929 | if (*pgp == 0 |
| 930 | && (! relocatable |
| 931 | || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| 932 | { |
| 933 | if (relocatable) |
| 934 | { |
| 935 | /* Make up a value. */ |
| 936 | *pgp = symbol->section->output_section->vma + 0x4000; |
| 937 | _bfd_set_gp_value (output_bfd, *pgp); |
| 938 | } |
| 939 | else if (!mips_elf_assign_gp (output_bfd, pgp)) |
| 940 | { |
| 941 | *error_message = |
| 942 | (char *) _("GP relative relocation when _gp not defined"); |
| 943 | return bfd_reloc_dangerous; |
| 944 | } |
| 945 | } |
| 946 | |
| 947 | return bfd_reloc_ok; |
| 948 | } |
| 949 | |
| 950 | /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must |
| 951 | become the offset from the gp register. This function also handles |
| 952 | R_MIPS_LITERAL relocations, although those can be handled more |
| 953 | cleverly because the entries in the .lit8 and .lit4 sections can be |
| 954 | merged. */ |
| 955 | |
| 956 | bfd_reloc_status_type |
| 957 | _bfd_mips_elf32_gprel16_reloc (bfd *abfd, arelent *reloc_entry, |
| 958 | asymbol *symbol, void *data, |
| 959 | asection *input_section, bfd *output_bfd, |
| 960 | char **error_message) |
| 961 | { |
| 962 | bfd_boolean relocatable; |
| 963 | bfd_reloc_status_type ret; |
| 964 | bfd_vma gp; |
| 965 | |
| 966 | /* R_MIPS_LITERAL relocations are defined for local symbols only. */ |
| 967 | if (reloc_entry->howto->type == R_MIPS_LITERAL |
| 968 | && output_bfd != NULL |
| 969 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 970 | && (symbol->flags & BSF_LOCAL) != 0) |
| 971 | { |
| 972 | *error_message = (char *) |
| 973 | _("literal relocation occurs for an external symbol"); |
| 974 | return bfd_reloc_outofrange; |
| 975 | } |
| 976 | |
| 977 | if (output_bfd != NULL) |
| 978 | relocatable = TRUE; |
| 979 | else |
| 980 | { |
| 981 | relocatable = FALSE; |
| 982 | output_bfd = symbol->section->output_section->owner; |
| 983 | } |
| 984 | |
| 985 | ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message, |
| 986 | &gp); |
| 987 | if (ret != bfd_reloc_ok) |
| 988 | return ret; |
| 989 | |
| 990 | return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, |
| 991 | input_section, relocatable, |
| 992 | data, gp); |
| 993 | } |
| 994 | |
| 995 | /* Do a R_MIPS_GPREL32 relocation. This is a 32 bit value which must |
| 996 | become the offset from the gp register. */ |
| 997 | |
| 998 | static bfd_reloc_status_type |
| 999 | mips_elf_gprel32_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1000 | void *data, asection *input_section, bfd *output_bfd, |
| 1001 | char **error_message) |
| 1002 | { |
| 1003 | bfd_boolean relocatable; |
| 1004 | bfd_reloc_status_type ret; |
| 1005 | bfd_vma gp; |
| 1006 | |
| 1007 | /* R_MIPS_GPREL32 relocations are defined for local symbols only. */ |
| 1008 | if (output_bfd != NULL |
| 1009 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1010 | && (symbol->flags & BSF_LOCAL) != 0) |
| 1011 | { |
| 1012 | *error_message = (char *) |
| 1013 | _("32bits gp relative relocation occurs for an external symbol"); |
| 1014 | return bfd_reloc_outofrange; |
| 1015 | } |
| 1016 | |
| 1017 | if (output_bfd != NULL) |
| 1018 | relocatable = TRUE; |
| 1019 | else |
| 1020 | { |
| 1021 | relocatable = FALSE; |
| 1022 | output_bfd = symbol->section->output_section->owner; |
| 1023 | } |
| 1024 | |
| 1025 | ret = mips_elf_final_gp (output_bfd, symbol, relocatable, |
| 1026 | error_message, &gp); |
| 1027 | if (ret != bfd_reloc_ok) |
| 1028 | return ret; |
| 1029 | |
| 1030 | return gprel32_with_gp (abfd, symbol, reloc_entry, input_section, |
| 1031 | relocatable, data, gp); |
| 1032 | } |
| 1033 | |
| 1034 | static bfd_reloc_status_type |
| 1035 | gprel32_with_gp (bfd *abfd, asymbol *symbol, arelent *reloc_entry, |
| 1036 | asection *input_section, bfd_boolean relocatable, |
| 1037 | void *data, bfd_vma gp) |
| 1038 | { |
| 1039 | bfd_vma relocation; |
| 1040 | bfd_vma val; |
| 1041 | |
| 1042 | if (bfd_is_com_section (symbol->section)) |
| 1043 | relocation = 0; |
| 1044 | else |
| 1045 | relocation = symbol->value; |
| 1046 | |
| 1047 | relocation += symbol->section->output_section->vma; |
| 1048 | relocation += symbol->section->output_offset; |
| 1049 | |
| 1050 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 1051 | return bfd_reloc_outofrange; |
| 1052 | |
| 1053 | /* Set val to the offset into the section or symbol. */ |
| 1054 | val = reloc_entry->addend; |
| 1055 | |
| 1056 | if (reloc_entry->howto->partial_inplace) |
| 1057 | val += bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1058 | |
| 1059 | /* Adjust val for the final section location and GP value. If we |
| 1060 | are producing relocatable output, we don't want to do this for |
| 1061 | an external symbol. */ |
| 1062 | if (! relocatable |
| 1063 | || (symbol->flags & BSF_SECTION_SYM) != 0) |
| 1064 | val += relocation - gp; |
| 1065 | |
| 1066 | if (reloc_entry->howto->partial_inplace) |
| 1067 | bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address); |
| 1068 | else |
| 1069 | reloc_entry->addend = val; |
| 1070 | |
| 1071 | if (relocatable) |
| 1072 | reloc_entry->address += input_section->output_offset; |
| 1073 | |
| 1074 | return bfd_reloc_ok; |
| 1075 | } |
| 1076 | |
| 1077 | /* Handle a 64 bit reloc in a 32 bit MIPS ELF file. These are |
| 1078 | generated when addresses are 64 bits. The upper 32 bits are a simple |
| 1079 | sign extension. */ |
| 1080 | |
| 1081 | static bfd_reloc_status_type |
| 1082 | mips32_64bit_reloc (bfd *abfd, arelent *reloc_entry, |
| 1083 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 1084 | void *data, asection *input_section, |
| 1085 | bfd *output_bfd, char **error_message) |
| 1086 | { |
| 1087 | bfd_reloc_status_type r; |
| 1088 | arelent reloc32; |
| 1089 | unsigned long val; |
| 1090 | bfd_size_type addr; |
| 1091 | |
| 1092 | /* Do a normal 32 bit relocation on the lower 32 bits. */ |
| 1093 | reloc32 = *reloc_entry; |
| 1094 | if (bfd_big_endian (abfd)) |
| 1095 | reloc32.address += 4; |
| 1096 | reloc32.howto = &elf_mips_howto_table_rel[R_MIPS_32]; |
| 1097 | r = bfd_perform_relocation (abfd, &reloc32, data, input_section, |
| 1098 | output_bfd, error_message); |
| 1099 | |
| 1100 | /* Sign extend into the upper 32 bits. */ |
| 1101 | val = bfd_get_32 (abfd, (bfd_byte *) data + reloc32.address); |
| 1102 | if ((val & 0x80000000) != 0) |
| 1103 | val = 0xffffffff; |
| 1104 | else |
| 1105 | val = 0; |
| 1106 | addr = reloc_entry->address; |
| 1107 | if (bfd_little_endian (abfd)) |
| 1108 | addr += 4; |
| 1109 | bfd_put_32 (abfd, val, (bfd_byte *) data + addr); |
| 1110 | |
| 1111 | return r; |
| 1112 | } |
| 1113 | |
| 1114 | /* Handle a mips16 jump. */ |
| 1115 | |
| 1116 | static bfd_reloc_status_type |
| 1117 | mips16_jump_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, |
| 1118 | asymbol *symbol, void *data ATTRIBUTE_UNUSED, |
| 1119 | asection *input_section, bfd *output_bfd, |
| 1120 | char **error_message ATTRIBUTE_UNUSED) |
| 1121 | { |
| 1122 | if (output_bfd != NULL |
| 1123 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1124 | && reloc_entry->addend == 0) |
| 1125 | { |
| 1126 | reloc_entry->address += input_section->output_offset; |
| 1127 | return bfd_reloc_ok; |
| 1128 | } |
| 1129 | |
| 1130 | /* FIXME. */ |
| 1131 | { |
| 1132 | static bfd_boolean warned; |
| 1133 | |
| 1134 | if (! warned) |
| 1135 | (*_bfd_error_handler) |
| 1136 | (_("Linking mips16 objects into %s format is not supported"), |
| 1137 | bfd_get_target (input_section->output_section->owner)); |
| 1138 | warned = TRUE; |
| 1139 | } |
| 1140 | |
| 1141 | return bfd_reloc_undefined; |
| 1142 | } |
| 1143 | |
| 1144 | /* Handle a mips16 GP relative reloc. */ |
| 1145 | |
| 1146 | static bfd_reloc_status_type |
| 1147 | mips16_gprel_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1148 | void *data, asection *input_section, bfd *output_bfd, |
| 1149 | char **error_message) |
| 1150 | { |
| 1151 | bfd_boolean relocatable; |
| 1152 | bfd_reloc_status_type ret; |
| 1153 | bfd_byte *location; |
| 1154 | bfd_vma gp; |
| 1155 | |
| 1156 | /* If we're relocating, and this is an external symbol, we don't want |
| 1157 | to change anything. */ |
| 1158 | if (output_bfd != NULL |
| 1159 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1160 | && (symbol->flags & BSF_LOCAL) != 0) |
| 1161 | { |
| 1162 | reloc_entry->address += input_section->output_offset; |
| 1163 | return bfd_reloc_ok; |
| 1164 | } |
| 1165 | |
| 1166 | if (output_bfd != NULL) |
| 1167 | relocatable = TRUE; |
| 1168 | else |
| 1169 | { |
| 1170 | relocatable = FALSE; |
| 1171 | output_bfd = symbol->section->output_section->owner; |
| 1172 | } |
| 1173 | |
| 1174 | ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message, |
| 1175 | &gp); |
| 1176 | if (ret != bfd_reloc_ok) |
| 1177 | return ret; |
| 1178 | |
| 1179 | location = (bfd_byte *) data + reloc_entry->address; |
| 1180 | _bfd_mips16_elf_reloc_unshuffle (abfd, reloc_entry->howto->type, FALSE, |
| 1181 | location); |
| 1182 | ret = _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, |
| 1183 | input_section, relocatable, |
| 1184 | data, gp); |
| 1185 | _bfd_mips16_elf_reloc_shuffle (abfd, reloc_entry->howto->type, !relocatable, |
| 1186 | location); |
| 1187 | |
| 1188 | return ret; |
| 1189 | } |
| 1190 | |
| 1191 | /* A mapping from BFD reloc types to MIPS ELF reloc types. */ |
| 1192 | |
| 1193 | struct elf_reloc_map { |
| 1194 | bfd_reloc_code_real_type bfd_val; |
| 1195 | enum elf_mips_reloc_type elf_val; |
| 1196 | }; |
| 1197 | |
| 1198 | static const struct elf_reloc_map mips_reloc_map[] = |
| 1199 | { |
| 1200 | { BFD_RELOC_NONE, R_MIPS_NONE }, |
| 1201 | { BFD_RELOC_16, R_MIPS_16 }, |
| 1202 | { BFD_RELOC_32, R_MIPS_32 }, |
| 1203 | /* There is no BFD reloc for R_MIPS_REL32. */ |
| 1204 | { BFD_RELOC_64, R_MIPS_64 }, |
| 1205 | { BFD_RELOC_MIPS_JMP, R_MIPS_26 }, |
| 1206 | { BFD_RELOC_HI16_S, R_MIPS_HI16 }, |
| 1207 | { BFD_RELOC_LO16, R_MIPS_LO16 }, |
| 1208 | { BFD_RELOC_GPREL16, R_MIPS_GPREL16 }, |
| 1209 | { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL }, |
| 1210 | { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 }, |
| 1211 | { BFD_RELOC_16_PCREL_S2, R_MIPS_PC16 }, |
| 1212 | { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 }, |
| 1213 | { BFD_RELOC_GPREL32, R_MIPS_GPREL32 }, |
| 1214 | { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 }, |
| 1215 | { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 }, |
| 1216 | { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 }, |
| 1217 | { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 }, |
| 1218 | { BFD_RELOC_MIPS_SUB, R_MIPS_SUB }, |
| 1219 | { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE }, |
| 1220 | { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST }, |
| 1221 | { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP }, |
| 1222 | { BFD_RELOC_MIPS_TLS_DTPMOD32, R_MIPS_TLS_DTPMOD32 }, |
| 1223 | { BFD_RELOC_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL32 }, |
| 1224 | { BFD_RELOC_MIPS_TLS_DTPMOD64, R_MIPS_TLS_DTPMOD64 }, |
| 1225 | { BFD_RELOC_MIPS_TLS_DTPREL64, R_MIPS_TLS_DTPREL64 }, |
| 1226 | { BFD_RELOC_MIPS_TLS_GD, R_MIPS_TLS_GD }, |
| 1227 | { BFD_RELOC_MIPS_TLS_LDM, R_MIPS_TLS_LDM }, |
| 1228 | { BFD_RELOC_MIPS_TLS_DTPREL_HI16, R_MIPS_TLS_DTPREL_HI16 }, |
| 1229 | { BFD_RELOC_MIPS_TLS_DTPREL_LO16, R_MIPS_TLS_DTPREL_LO16 }, |
| 1230 | { BFD_RELOC_MIPS_TLS_GOTTPREL, R_MIPS_TLS_GOTTPREL }, |
| 1231 | { BFD_RELOC_MIPS_TLS_TPREL32, R_MIPS_TLS_TPREL32 }, |
| 1232 | { BFD_RELOC_MIPS_TLS_TPREL64, R_MIPS_TLS_TPREL64 }, |
| 1233 | { BFD_RELOC_MIPS_TLS_TPREL_HI16, R_MIPS_TLS_TPREL_HI16 }, |
| 1234 | { BFD_RELOC_MIPS_TLS_TPREL_LO16, R_MIPS_TLS_TPREL_LO16 } |
| 1235 | }; |
| 1236 | |
| 1237 | static const struct elf_reloc_map mips16_reloc_map[] = |
| 1238 | { |
| 1239 | { BFD_RELOC_MIPS16_JMP, R_MIPS16_26 - R_MIPS16_min }, |
| 1240 | { BFD_RELOC_MIPS16_GPREL, R_MIPS16_GPREL - R_MIPS16_min }, |
| 1241 | { BFD_RELOC_MIPS16_HI16_S, R_MIPS16_HI16 - R_MIPS16_min }, |
| 1242 | { BFD_RELOC_MIPS16_LO16, R_MIPS16_LO16 - R_MIPS16_min }, |
| 1243 | }; |
| 1244 | |
| 1245 | /* Given a BFD reloc type, return a howto structure. */ |
| 1246 | |
| 1247 | static reloc_howto_type * |
| 1248 | bfd_elf32_bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code) |
| 1249 | { |
| 1250 | unsigned int i; |
| 1251 | reloc_howto_type *howto_table = elf_mips_howto_table_rel; |
| 1252 | reloc_howto_type *howto16_table = elf_mips16_howto_table_rel; |
| 1253 | |
| 1254 | for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); |
| 1255 | i++) |
| 1256 | { |
| 1257 | if (mips_reloc_map[i].bfd_val == code) |
| 1258 | return &howto_table[(int) mips_reloc_map[i].elf_val]; |
| 1259 | } |
| 1260 | |
| 1261 | for (i = 0; i < sizeof (mips16_reloc_map) / sizeof (struct elf_reloc_map); |
| 1262 | i++) |
| 1263 | { |
| 1264 | if (mips16_reloc_map[i].bfd_val == code) |
| 1265 | return &howto16_table[(int) mips16_reloc_map[i].elf_val]; |
| 1266 | } |
| 1267 | |
| 1268 | switch (code) |
| 1269 | { |
| 1270 | default: |
| 1271 | bfd_set_error (bfd_error_bad_value); |
| 1272 | return NULL; |
| 1273 | |
| 1274 | case BFD_RELOC_CTOR: |
| 1275 | /* We need to handle BFD_RELOC_CTOR specially. |
| 1276 | Select the right relocation (R_MIPS_32 or R_MIPS_64) based on the |
| 1277 | size of addresses of the ABI. */ |
| 1278 | if ((elf_elfheader (abfd)->e_flags & (E_MIPS_ABI_O64 |
| 1279 | | E_MIPS_ABI_EABI64)) != 0) |
| 1280 | return &elf_mips_ctor64_howto; |
| 1281 | else |
| 1282 | return &howto_table[(int) R_MIPS_32]; |
| 1283 | |
| 1284 | case BFD_RELOC_VTABLE_INHERIT: |
| 1285 | return &elf_mips_gnu_vtinherit_howto; |
| 1286 | case BFD_RELOC_VTABLE_ENTRY: |
| 1287 | return &elf_mips_gnu_vtentry_howto; |
| 1288 | case BFD_RELOC_32_PCREL: |
| 1289 | return &elf_mips_gnu_pcrel32; |
| 1290 | } |
| 1291 | } |
| 1292 | |
| 1293 | /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */ |
| 1294 | |
| 1295 | static reloc_howto_type * |
| 1296 | mips_elf32_rtype_to_howto (unsigned int r_type, |
| 1297 | bfd_boolean rela_p ATTRIBUTE_UNUSED) |
| 1298 | { |
| 1299 | switch (r_type) |
| 1300 | { |
| 1301 | case R_MIPS_GNU_VTINHERIT: |
| 1302 | return &elf_mips_gnu_vtinherit_howto; |
| 1303 | case R_MIPS_GNU_VTENTRY: |
| 1304 | return &elf_mips_gnu_vtentry_howto; |
| 1305 | case R_MIPS_GNU_REL16_S2: |
| 1306 | return &elf_mips_gnu_rel16_s2; |
| 1307 | case R_MIPS_PC32: |
| 1308 | return &elf_mips_gnu_pcrel32; |
| 1309 | default: |
| 1310 | if (r_type >= R_MIPS16_min && r_type < R_MIPS16_max) |
| 1311 | return &elf_mips16_howto_table_rel[r_type - R_MIPS16_min]; |
| 1312 | BFD_ASSERT (r_type < (unsigned int) R_MIPS_max); |
| 1313 | return &elf_mips_howto_table_rel[r_type]; |
| 1314 | } |
| 1315 | } |
| 1316 | |
| 1317 | /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */ |
| 1318 | |
| 1319 | static void |
| 1320 | mips_info_to_howto_rel (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst) |
| 1321 | { |
| 1322 | unsigned int r_type; |
| 1323 | |
| 1324 | r_type = ELF32_R_TYPE (dst->r_info); |
| 1325 | cache_ptr->howto = mips_elf32_rtype_to_howto (r_type, FALSE); |
| 1326 | |
| 1327 | /* The addend for a GPREL16 or LITERAL relocation comes from the GP |
| 1328 | value for the object file. We get the addend now, rather than |
| 1329 | when we do the relocation, because the symbol manipulations done |
| 1330 | by the linker may cause us to lose track of the input BFD. */ |
| 1331 | if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0 |
| 1332 | && (r_type == (unsigned int) R_MIPS_GPREL16 |
| 1333 | || r_type == (unsigned int) R_MIPS_LITERAL)) |
| 1334 | cache_ptr->addend = elf_gp (abfd); |
| 1335 | } |
| 1336 | |
| 1337 | /* Given a MIPS Elf_Internal_Rela, fill in an arelent structure. */ |
| 1338 | |
| 1339 | static void |
| 1340 | mips_info_to_howto_rela (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst) |
| 1341 | { |
| 1342 | mips_info_to_howto_rel (abfd, cache_ptr, dst); |
| 1343 | |
| 1344 | /* If we ever need to do any extra processing with dst->r_addend |
| 1345 | (the field omitted in an Elf_Internal_Rel) we can do it here. */ |
| 1346 | } |
| 1347 | \f |
| 1348 | /* Determine whether a symbol is global for the purposes of splitting |
| 1349 | the symbol table into global symbols and local symbols. At least |
| 1350 | on Irix 5, this split must be between section symbols and all other |
| 1351 | symbols. On most ELF targets the split is between static symbols |
| 1352 | and externally visible symbols. */ |
| 1353 | |
| 1354 | static bfd_boolean |
| 1355 | mips_elf_sym_is_global (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym) |
| 1356 | { |
| 1357 | if (SGI_COMPAT (abfd)) |
| 1358 | return (sym->flags & BSF_SECTION_SYM) == 0; |
| 1359 | else |
| 1360 | return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 |
| 1361 | || bfd_is_und_section (bfd_get_section (sym)) |
| 1362 | || bfd_is_com_section (bfd_get_section (sym))); |
| 1363 | } |
| 1364 | \f |
| 1365 | /* Set the right machine number for a MIPS ELF file. */ |
| 1366 | |
| 1367 | static bfd_boolean |
| 1368 | mips_elf32_object_p (bfd *abfd) |
| 1369 | { |
| 1370 | unsigned long mach; |
| 1371 | |
| 1372 | /* Irix 5 and 6 are broken. Object file symbol tables are not always |
| 1373 | sorted correctly such that local symbols precede global symbols, |
| 1374 | and the sh_info field in the symbol table is not always right. */ |
| 1375 | if (SGI_COMPAT (abfd)) |
| 1376 | elf_bad_symtab (abfd) = TRUE; |
| 1377 | |
| 1378 | if (ABI_N32_P (abfd)) |
| 1379 | return FALSE; |
| 1380 | |
| 1381 | mach = _bfd_elf_mips_mach (elf_elfheader (abfd)->e_flags); |
| 1382 | bfd_default_set_arch_mach (abfd, bfd_arch_mips, mach); |
| 1383 | |
| 1384 | return TRUE; |
| 1385 | } |
| 1386 | \f |
| 1387 | /* MIPS ELF local labels start with '$', not 'L'. */ |
| 1388 | |
| 1389 | static bfd_boolean |
| 1390 | mips_elf_is_local_label_name (bfd *abfd, const char *name) |
| 1391 | { |
| 1392 | if (name[0] == '$') |
| 1393 | return TRUE; |
| 1394 | |
| 1395 | /* On Irix 6, the labels go back to starting with '.', so we accept |
| 1396 | the generic ELF local label syntax as well. */ |
| 1397 | return _bfd_elf_is_local_label_name (abfd, name); |
| 1398 | } |
| 1399 | \f |
| 1400 | /* Support for core dump NOTE sections. */ |
| 1401 | static bfd_boolean |
| 1402 | elf32_mips_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 1403 | { |
| 1404 | int offset; |
| 1405 | unsigned int size; |
| 1406 | |
| 1407 | switch (note->descsz) |
| 1408 | { |
| 1409 | default: |
| 1410 | return FALSE; |
| 1411 | |
| 1412 | case 256: /* Linux/MIPS */ |
| 1413 | /* pr_cursig */ |
| 1414 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); |
| 1415 | |
| 1416 | /* pr_pid */ |
| 1417 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); |
| 1418 | |
| 1419 | /* pr_reg */ |
| 1420 | offset = 72; |
| 1421 | size = 180; |
| 1422 | |
| 1423 | break; |
| 1424 | } |
| 1425 | |
| 1426 | /* Make a ".reg/999" section. */ |
| 1427 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 1428 | size, note->descpos + offset); |
| 1429 | } |
| 1430 | |
| 1431 | static bfd_boolean |
| 1432 | elf32_mips_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 1433 | { |
| 1434 | switch (note->descsz) |
| 1435 | { |
| 1436 | default: |
| 1437 | return FALSE; |
| 1438 | |
| 1439 | case 128: /* Linux/MIPS elf_prpsinfo */ |
| 1440 | elf_tdata (abfd)->core_program |
| 1441 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); |
| 1442 | elf_tdata (abfd)->core_command |
| 1443 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); |
| 1444 | } |
| 1445 | |
| 1446 | /* Note that for some reason, a spurious space is tacked |
| 1447 | onto the end of the args in some (at least one anyway) |
| 1448 | implementations, so strip it off if it exists. */ |
| 1449 | |
| 1450 | { |
| 1451 | char *command = elf_tdata (abfd)->core_command; |
| 1452 | int n = strlen (command); |
| 1453 | |
| 1454 | if (0 < n && command[n - 1] == ' ') |
| 1455 | command[n - 1] = '\0'; |
| 1456 | } |
| 1457 | |
| 1458 | return TRUE; |
| 1459 | } |
| 1460 | \f |
| 1461 | /* Depending on the target vector we generate some version of Irix |
| 1462 | executables or "normal" MIPS ELF ABI executables. */ |
| 1463 | static irix_compat_t |
| 1464 | elf32_mips_irix_compat (bfd *abfd) |
| 1465 | { |
| 1466 | if ((abfd->xvec == &bfd_elf32_bigmips_vec) |
| 1467 | || (abfd->xvec == &bfd_elf32_littlemips_vec)) |
| 1468 | return ict_irix5; |
| 1469 | else |
| 1470 | return ict_none; |
| 1471 | } |
| 1472 | \f |
| 1473 | /* ECOFF swapping routines. These are used when dealing with the |
| 1474 | .mdebug section, which is in the ECOFF debugging format. */ |
| 1475 | static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = { |
| 1476 | /* Symbol table magic number. */ |
| 1477 | magicSym, |
| 1478 | /* Alignment of debugging information. E.g., 4. */ |
| 1479 | 4, |
| 1480 | /* Sizes of external symbolic information. */ |
| 1481 | sizeof (struct hdr_ext), |
| 1482 | sizeof (struct dnr_ext), |
| 1483 | sizeof (struct pdr_ext), |
| 1484 | sizeof (struct sym_ext), |
| 1485 | sizeof (struct opt_ext), |
| 1486 | sizeof (struct fdr_ext), |
| 1487 | sizeof (struct rfd_ext), |
| 1488 | sizeof (struct ext_ext), |
| 1489 | /* Functions to swap in external symbolic data. */ |
| 1490 | ecoff_swap_hdr_in, |
| 1491 | ecoff_swap_dnr_in, |
| 1492 | ecoff_swap_pdr_in, |
| 1493 | ecoff_swap_sym_in, |
| 1494 | ecoff_swap_opt_in, |
| 1495 | ecoff_swap_fdr_in, |
| 1496 | ecoff_swap_rfd_in, |
| 1497 | ecoff_swap_ext_in, |
| 1498 | _bfd_ecoff_swap_tir_in, |
| 1499 | _bfd_ecoff_swap_rndx_in, |
| 1500 | /* Functions to swap out external symbolic data. */ |
| 1501 | ecoff_swap_hdr_out, |
| 1502 | ecoff_swap_dnr_out, |
| 1503 | ecoff_swap_pdr_out, |
| 1504 | ecoff_swap_sym_out, |
| 1505 | ecoff_swap_opt_out, |
| 1506 | ecoff_swap_fdr_out, |
| 1507 | ecoff_swap_rfd_out, |
| 1508 | ecoff_swap_ext_out, |
| 1509 | _bfd_ecoff_swap_tir_out, |
| 1510 | _bfd_ecoff_swap_rndx_out, |
| 1511 | /* Function to read in symbolic data. */ |
| 1512 | _bfd_mips_elf_read_ecoff_info |
| 1513 | }; |
| 1514 | \f |
| 1515 | #define ELF_ARCH bfd_arch_mips |
| 1516 | #define ELF_MACHINE_CODE EM_MIPS |
| 1517 | |
| 1518 | #define elf_backend_collect TRUE |
| 1519 | #define elf_backend_type_change_ok TRUE |
| 1520 | #define elf_backend_can_gc_sections TRUE |
| 1521 | #define elf_info_to_howto mips_info_to_howto_rela |
| 1522 | #define elf_info_to_howto_rel mips_info_to_howto_rel |
| 1523 | #define elf_backend_sym_is_global mips_elf_sym_is_global |
| 1524 | #define elf_backend_object_p mips_elf32_object_p |
| 1525 | #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing |
| 1526 | #define elf_backend_section_processing _bfd_mips_elf_section_processing |
| 1527 | #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr |
| 1528 | #define elf_backend_fake_sections _bfd_mips_elf_fake_sections |
| 1529 | #define elf_backend_section_from_bfd_section \ |
| 1530 | _bfd_mips_elf_section_from_bfd_section |
| 1531 | #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook |
| 1532 | #define elf_backend_link_output_symbol_hook \ |
| 1533 | _bfd_mips_elf_link_output_symbol_hook |
| 1534 | #define elf_backend_create_dynamic_sections \ |
| 1535 | _bfd_mips_elf_create_dynamic_sections |
| 1536 | #define elf_backend_check_relocs _bfd_mips_elf_check_relocs |
| 1537 | #define elf_backend_adjust_dynamic_symbol \ |
| 1538 | _bfd_mips_elf_adjust_dynamic_symbol |
| 1539 | #define elf_backend_always_size_sections \ |
| 1540 | _bfd_mips_elf_always_size_sections |
| 1541 | #define elf_backend_size_dynamic_sections \ |
| 1542 | _bfd_mips_elf_size_dynamic_sections |
| 1543 | #define elf_backend_relocate_section _bfd_mips_elf_relocate_section |
| 1544 | #define elf_backend_finish_dynamic_symbol \ |
| 1545 | _bfd_mips_elf_finish_dynamic_symbol |
| 1546 | #define elf_backend_finish_dynamic_sections \ |
| 1547 | _bfd_mips_elf_finish_dynamic_sections |
| 1548 | #define elf_backend_final_write_processing \ |
| 1549 | _bfd_mips_elf_final_write_processing |
| 1550 | #define elf_backend_additional_program_headers \ |
| 1551 | _bfd_mips_elf_additional_program_headers |
| 1552 | #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map |
| 1553 | #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook |
| 1554 | #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook |
| 1555 | #define elf_backend_copy_indirect_symbol \ |
| 1556 | _bfd_mips_elf_copy_indirect_symbol |
| 1557 | #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol |
| 1558 | #define elf_backend_grok_prstatus elf32_mips_grok_prstatus |
| 1559 | #define elf_backend_grok_psinfo elf32_mips_grok_psinfo |
| 1560 | #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap |
| 1561 | |
| 1562 | #define elf_backend_got_header_size (4 * MIPS_RESERVED_GOTNO) |
| 1563 | #define elf_backend_may_use_rel_p 1 |
| 1564 | #define elf_backend_may_use_rela_p 0 |
| 1565 | #define elf_backend_default_use_rela_p 0 |
| 1566 | #define elf_backend_sign_extend_vma TRUE |
| 1567 | |
| 1568 | #define elf_backend_discard_info _bfd_mips_elf_discard_info |
| 1569 | #define elf_backend_ignore_discarded_relocs \ |
| 1570 | _bfd_mips_elf_ignore_discarded_relocs |
| 1571 | #define elf_backend_mips_irix_compat elf32_mips_irix_compat |
| 1572 | #define elf_backend_mips_rtype_to_howto mips_elf32_rtype_to_howto |
| 1573 | #define bfd_elf32_bfd_is_local_label_name \ |
| 1574 | mips_elf_is_local_label_name |
| 1575 | #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line |
| 1576 | #define bfd_elf32_find_inliner_info _bfd_mips_elf_find_inliner_info |
| 1577 | #define bfd_elf32_new_section_hook _bfd_mips_elf_new_section_hook |
| 1578 | #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents |
| 1579 | #define bfd_elf32_bfd_get_relocated_section_contents \ |
| 1580 | _bfd_elf_mips_get_relocated_section_contents |
| 1581 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 1582 | _bfd_mips_elf_link_hash_table_create |
| 1583 | #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link |
| 1584 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 1585 | _bfd_mips_elf_merge_private_bfd_data |
| 1586 | #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags |
| 1587 | #define bfd_elf32_bfd_print_private_bfd_data \ |
| 1588 | _bfd_mips_elf_print_private_bfd_data |
| 1589 | |
| 1590 | /* Support for SGI-ish mips targets. */ |
| 1591 | #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec |
| 1592 | #define TARGET_LITTLE_NAME "elf32-littlemips" |
| 1593 | #define TARGET_BIG_SYM bfd_elf32_bigmips_vec |
| 1594 | #define TARGET_BIG_NAME "elf32-bigmips" |
| 1595 | |
| 1596 | /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses |
| 1597 | a value of 0x1000, and we are compatible. */ |
| 1598 | #define ELF_MAXPAGESIZE 0x1000 |
| 1599 | |
| 1600 | #include "elf32-target.h" |
| 1601 | |
| 1602 | /* Support for traditional mips targets. */ |
| 1603 | #undef TARGET_LITTLE_SYM |
| 1604 | #undef TARGET_LITTLE_NAME |
| 1605 | #undef TARGET_BIG_SYM |
| 1606 | #undef TARGET_BIG_NAME |
| 1607 | |
| 1608 | #undef ELF_MAXPAGESIZE |
| 1609 | |
| 1610 | #define TARGET_LITTLE_SYM bfd_elf32_tradlittlemips_vec |
| 1611 | #define TARGET_LITTLE_NAME "elf32-tradlittlemips" |
| 1612 | #define TARGET_BIG_SYM bfd_elf32_tradbigmips_vec |
| 1613 | #define TARGET_BIG_NAME "elf32-tradbigmips" |
| 1614 | |
| 1615 | /* The SVR4 MIPS ABI says that this should be 0x10000, and Linux uses |
| 1616 | page sizes of up to that limit, so we need to respect it. */ |
| 1617 | #define ELF_MAXPAGESIZE 0x10000 |
| 1618 | #define elf32_bed elf32_tradbed |
| 1619 | |
| 1620 | /* Include the target file again for this target. */ |
| 1621 | #include "elf32-target.h" |