| 1 | /* MIPS-specific support for 32-bit ELF |
| 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | Most of the information added by Ian Lance Taylor, Cygnus Support, |
| 6 | <ian@cygnus.com>. |
| 7 | N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC. |
| 8 | <mark@codesourcery.com> |
| 9 | Traditional MIPS targets support added by Koundinya.K, Dansk Data |
| 10 | Elektronik & Operations Research Group. <kk@ddeorg.soft.net> |
| 11 | |
| 12 | This file is part of BFD, the Binary File Descriptor library. |
| 13 | |
| 14 | This program is free software; you can redistribute it and/or modify |
| 15 | it under the terms of the GNU General Public License as published by |
| 16 | the Free Software Foundation; either version 2 of the License, or |
| 17 | (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, |
| 20 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | GNU General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 27 | |
| 28 | /* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly |
| 29 | different MIPS ELF from other targets. This matters when linking. |
| 30 | This file supports both, switching at runtime. */ |
| 31 | |
| 32 | #include "bfd.h" |
| 33 | #include "sysdep.h" |
| 34 | #include "libbfd.h" |
| 35 | #include "bfdlink.h" |
| 36 | #include "genlink.h" |
| 37 | #include "elf-bfd.h" |
| 38 | #include "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 mips_elf_generic_reloc |
| 51 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 52 | static bfd_reloc_status_type mips_elf_hi16_reloc |
| 53 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 54 | static bfd_reloc_status_type mips_elf_lo16_reloc |
| 55 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 56 | static bfd_reloc_status_type mips_elf_got16_reloc |
| 57 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 58 | static bfd_boolean mips_elf_assign_gp |
| 59 | PARAMS ((bfd *, bfd_vma *)); |
| 60 | static bfd_reloc_status_type mips_elf_final_gp |
| 61 | PARAMS ((bfd *, asymbol *, bfd_boolean, char **, bfd_vma *)); |
| 62 | static bfd_reloc_status_type mips_elf_gprel16_reloc |
| 63 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 64 | static bfd_reloc_status_type mips_elf_literal_reloc |
| 65 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 66 | static bfd_reloc_status_type mips_elf_gprel32_reloc |
| 67 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 68 | static bfd_reloc_status_type gprel32_with_gp |
| 69 | PARAMS ((bfd *, asymbol *, arelent *, asection *, bfd_boolean, PTR, |
| 70 | bfd_vma)); |
| 71 | static bfd_reloc_status_type mips_elf_shift6_reloc |
| 72 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 73 | static bfd_reloc_status_type mips16_jump_reloc |
| 74 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 75 | static bfd_reloc_status_type mips16_gprel_reloc |
| 76 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 77 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
| 78 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 79 | static reloc_howto_type *mips_elf_n32_rtype_to_howto |
| 80 | PARAMS ((unsigned int, bfd_boolean)); |
| 81 | static void mips_info_to_howto_rel |
| 82 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 83 | static void mips_info_to_howto_rela |
| 84 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 85 | static bfd_boolean mips_elf_sym_is_global |
| 86 | PARAMS ((bfd *, asymbol *)); |
| 87 | static bfd_boolean mips_elf_n32_object_p |
| 88 | PARAMS ((bfd *)); |
| 89 | static bfd_boolean elf32_mips_grok_prstatus |
| 90 | PARAMS ((bfd *, Elf_Internal_Note *)); |
| 91 | static bfd_boolean elf32_mips_grok_psinfo |
| 92 | PARAMS ((bfd *, Elf_Internal_Note *)); |
| 93 | static irix_compat_t elf_n32_mips_irix_compat |
| 94 | PARAMS ((bfd *)); |
| 95 | |
| 96 | extern const bfd_target bfd_elf32_nbigmips_vec; |
| 97 | extern const bfd_target bfd_elf32_nlittlemips_vec; |
| 98 | |
| 99 | static bfd_vma prev_reloc_address = -1; |
| 100 | static bfd_vma prev_reloc_addend = 0; |
| 101 | |
| 102 | /* Nonzero if ABFD is using the N32 ABI. */ |
| 103 | #define ABI_N32_P(abfd) \ |
| 104 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0) |
| 105 | |
| 106 | /* Whether we are trying to be compatible with IRIX at all. */ |
| 107 | #define SGI_COMPAT(abfd) \ |
| 108 | (elf_n32_mips_irix_compat (abfd) != ict_none) |
| 109 | |
| 110 | /* The number of local .got entries we reserve. */ |
| 111 | #define MIPS_RESERVED_GOTNO (2) |
| 112 | |
| 113 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| 114 | from smaller values. Start with zero, widen, *then* decrement. */ |
| 115 | #define MINUS_ONE (((bfd_vma)0) - 1) |
| 116 | |
| 117 | /* The relocation table used for SHT_REL sections. */ |
| 118 | |
| 119 | static reloc_howto_type elf_mips_howto_table_rel[] = |
| 120 | { |
| 121 | /* No relocation. */ |
| 122 | HOWTO (R_MIPS_NONE, /* type */ |
| 123 | 0, /* rightshift */ |
| 124 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 125 | 0, /* bitsize */ |
| 126 | FALSE, /* pc_relative */ |
| 127 | 0, /* bitpos */ |
| 128 | complain_overflow_dont, /* complain_on_overflow */ |
| 129 | mips_elf_generic_reloc, /* special_function */ |
| 130 | "R_MIPS_NONE", /* name */ |
| 131 | FALSE, /* partial_inplace */ |
| 132 | 0, /* src_mask */ |
| 133 | 0, /* dst_mask */ |
| 134 | FALSE), /* pcrel_offset */ |
| 135 | |
| 136 | /* 16 bit relocation. */ |
| 137 | HOWTO (R_MIPS_16, /* type */ |
| 138 | 0, /* rightshift */ |
| 139 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 140 | 16, /* bitsize */ |
| 141 | FALSE, /* pc_relative */ |
| 142 | 0, /* bitpos */ |
| 143 | complain_overflow_signed, /* complain_on_overflow */ |
| 144 | mips_elf_generic_reloc, /* special_function */ |
| 145 | "R_MIPS_16", /* name */ |
| 146 | TRUE, /* partial_inplace */ |
| 147 | 0x0000ffff, /* src_mask */ |
| 148 | 0x0000ffff, /* dst_mask */ |
| 149 | FALSE), /* pcrel_offset */ |
| 150 | |
| 151 | /* 32 bit relocation. */ |
| 152 | HOWTO (R_MIPS_32, /* type */ |
| 153 | 0, /* rightshift */ |
| 154 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 155 | 32, /* bitsize */ |
| 156 | FALSE, /* pc_relative */ |
| 157 | 0, /* bitpos */ |
| 158 | complain_overflow_dont, /* complain_on_overflow */ |
| 159 | mips_elf_generic_reloc, /* special_function */ |
| 160 | "R_MIPS_32", /* name */ |
| 161 | TRUE, /* partial_inplace */ |
| 162 | 0xffffffff, /* src_mask */ |
| 163 | 0xffffffff, /* dst_mask */ |
| 164 | FALSE), /* pcrel_offset */ |
| 165 | |
| 166 | /* 32 bit symbol relative relocation. */ |
| 167 | HOWTO (R_MIPS_REL32, /* type */ |
| 168 | 0, /* rightshift */ |
| 169 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 170 | 32, /* bitsize */ |
| 171 | FALSE, /* pc_relative */ |
| 172 | 0, /* bitpos */ |
| 173 | complain_overflow_dont, /* complain_on_overflow */ |
| 174 | mips_elf_generic_reloc, /* special_function */ |
| 175 | "R_MIPS_REL32", /* name */ |
| 176 | TRUE, /* partial_inplace */ |
| 177 | 0xffffffff, /* src_mask */ |
| 178 | 0xffffffff, /* dst_mask */ |
| 179 | FALSE), /* pcrel_offset */ |
| 180 | |
| 181 | /* 26 bit jump address. */ |
| 182 | HOWTO (R_MIPS_26, /* type */ |
| 183 | 2, /* rightshift */ |
| 184 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 185 | 26, /* bitsize */ |
| 186 | FALSE, /* pc_relative */ |
| 187 | 0, /* bitpos */ |
| 188 | complain_overflow_dont, /* complain_on_overflow */ |
| 189 | /* This needs complex overflow |
| 190 | detection, because the upper four |
| 191 | bits must match the PC + 4. */ |
| 192 | mips_elf_generic_reloc, /* special_function */ |
| 193 | "R_MIPS_26", /* name */ |
| 194 | TRUE, /* partial_inplace */ |
| 195 | 0x03ffffff, /* src_mask */ |
| 196 | 0x03ffffff, /* dst_mask */ |
| 197 | FALSE), /* pcrel_offset */ |
| 198 | |
| 199 | /* R_MIPS_HI16 and R_MIPS_LO16 are unsupported for NewABI REL. |
| 200 | However, the native IRIX6 tools use them, so we try our best. */ |
| 201 | |
| 202 | /* High 16 bits of symbol value. */ |
| 203 | HOWTO (R_MIPS_HI16, /* type */ |
| 204 | 0, /* rightshift */ |
| 205 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 206 | 16, /* bitsize */ |
| 207 | FALSE, /* pc_relative */ |
| 208 | 0, /* bitpos */ |
| 209 | complain_overflow_dont, /* complain_on_overflow */ |
| 210 | mips_elf_hi16_reloc, /* special_function */ |
| 211 | "R_MIPS_HI16", /* name */ |
| 212 | TRUE, /* partial_inplace */ |
| 213 | 0x0000ffff, /* src_mask */ |
| 214 | 0x0000ffff, /* dst_mask */ |
| 215 | FALSE), /* pcrel_offset */ |
| 216 | |
| 217 | /* Low 16 bits of symbol value. */ |
| 218 | HOWTO (R_MIPS_LO16, /* type */ |
| 219 | 0, /* rightshift */ |
| 220 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 221 | 16, /* bitsize */ |
| 222 | FALSE, /* pc_relative */ |
| 223 | 0, /* bitpos */ |
| 224 | complain_overflow_dont, /* complain_on_overflow */ |
| 225 | mips_elf_lo16_reloc, /* special_function */ |
| 226 | "R_MIPS_LO16", /* name */ |
| 227 | TRUE, /* partial_inplace */ |
| 228 | 0x0000ffff, /* src_mask */ |
| 229 | 0x0000ffff, /* dst_mask */ |
| 230 | FALSE), /* pcrel_offset */ |
| 231 | |
| 232 | /* GP relative reference. */ |
| 233 | HOWTO (R_MIPS_GPREL16, /* type */ |
| 234 | 0, /* rightshift */ |
| 235 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 236 | 16, /* bitsize */ |
| 237 | FALSE, /* pc_relative */ |
| 238 | 0, /* bitpos */ |
| 239 | complain_overflow_signed, /* complain_on_overflow */ |
| 240 | mips_elf_gprel16_reloc, /* special_function */ |
| 241 | "R_MIPS_GPREL16", /* name */ |
| 242 | TRUE, /* partial_inplace */ |
| 243 | 0x0000ffff, /* src_mask */ |
| 244 | 0x0000ffff, /* dst_mask */ |
| 245 | FALSE), /* pcrel_offset */ |
| 246 | |
| 247 | /* Reference to literal section. */ |
| 248 | HOWTO (R_MIPS_LITERAL, /* type */ |
| 249 | 0, /* rightshift */ |
| 250 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 251 | 16, /* bitsize */ |
| 252 | FALSE, /* pc_relative */ |
| 253 | 0, /* bitpos */ |
| 254 | complain_overflow_signed, /* complain_on_overflow */ |
| 255 | mips_elf_literal_reloc, /* special_function */ |
| 256 | "R_MIPS_LITERAL", /* name */ |
| 257 | TRUE, /* partial_inplace */ |
| 258 | 0x0000ffff, /* src_mask */ |
| 259 | 0x0000ffff, /* dst_mask */ |
| 260 | FALSE), /* pcrel_offset */ |
| 261 | |
| 262 | /* Reference to global offset table. */ |
| 263 | HOWTO (R_MIPS_GOT16, /* type */ |
| 264 | 0, /* rightshift */ |
| 265 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 266 | 16, /* bitsize */ |
| 267 | FALSE, /* pc_relative */ |
| 268 | 0, /* bitpos */ |
| 269 | complain_overflow_signed, /* complain_on_overflow */ |
| 270 | mips_elf_got16_reloc, /* special_function */ |
| 271 | "R_MIPS_GOT16", /* name */ |
| 272 | TRUE, /* partial_inplace */ |
| 273 | 0x0000ffff, /* src_mask */ |
| 274 | 0x0000ffff, /* dst_mask */ |
| 275 | FALSE), /* pcrel_offset */ |
| 276 | |
| 277 | /* 16 bit PC relative reference. */ |
| 278 | HOWTO (R_MIPS_PC16, /* type */ |
| 279 | 0, /* rightshift */ |
| 280 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 281 | 16, /* bitsize */ |
| 282 | TRUE, /* pc_relative */ |
| 283 | 0, /* bitpos */ |
| 284 | complain_overflow_signed, /* complain_on_overflow */ |
| 285 | mips_elf_generic_reloc, /* special_function */ |
| 286 | "R_MIPS_PC16", /* name */ |
| 287 | TRUE, /* partial_inplace */ |
| 288 | 0x0000ffff, /* src_mask */ |
| 289 | 0x0000ffff, /* dst_mask */ |
| 290 | TRUE), /* pcrel_offset */ |
| 291 | |
| 292 | /* 16 bit call through global offset table. */ |
| 293 | HOWTO (R_MIPS_CALL16, /* type */ |
| 294 | 0, /* rightshift */ |
| 295 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 296 | 16, /* bitsize */ |
| 297 | FALSE, /* pc_relative */ |
| 298 | 0, /* bitpos */ |
| 299 | complain_overflow_signed, /* complain_on_overflow */ |
| 300 | mips_elf_generic_reloc, /* special_function */ |
| 301 | "R_MIPS_CALL16", /* name */ |
| 302 | TRUE, /* partial_inplace */ |
| 303 | 0x0000ffff, /* src_mask */ |
| 304 | 0x0000ffff, /* dst_mask */ |
| 305 | FALSE), /* pcrel_offset */ |
| 306 | |
| 307 | /* 32 bit GP relative reference. */ |
| 308 | HOWTO (R_MIPS_GPREL32, /* type */ |
| 309 | 0, /* rightshift */ |
| 310 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 311 | 32, /* bitsize */ |
| 312 | FALSE, /* pc_relative */ |
| 313 | 0, /* bitpos */ |
| 314 | complain_overflow_dont, /* complain_on_overflow */ |
| 315 | mips_elf_gprel32_reloc, /* special_function */ |
| 316 | "R_MIPS_GPREL32", /* name */ |
| 317 | TRUE, /* partial_inplace */ |
| 318 | 0xffffffff, /* src_mask */ |
| 319 | 0xffffffff, /* dst_mask */ |
| 320 | FALSE), /* pcrel_offset */ |
| 321 | |
| 322 | /* The remaining relocs are defined on Irix 5, although they are |
| 323 | not defined by the ABI. */ |
| 324 | EMPTY_HOWTO (13), |
| 325 | EMPTY_HOWTO (14), |
| 326 | EMPTY_HOWTO (15), |
| 327 | |
| 328 | /* A 5 bit shift field. */ |
| 329 | HOWTO (R_MIPS_SHIFT5, /* type */ |
| 330 | 0, /* rightshift */ |
| 331 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 332 | 5, /* bitsize */ |
| 333 | FALSE, /* pc_relative */ |
| 334 | 6, /* bitpos */ |
| 335 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 336 | mips_elf_generic_reloc, /* special_function */ |
| 337 | "R_MIPS_SHIFT5", /* name */ |
| 338 | TRUE, /* partial_inplace */ |
| 339 | 0x000007c0, /* src_mask */ |
| 340 | 0x000007c0, /* dst_mask */ |
| 341 | FALSE), /* pcrel_offset */ |
| 342 | |
| 343 | /* A 6 bit shift field. */ |
| 344 | HOWTO (R_MIPS_SHIFT6, /* type */ |
| 345 | 0, /* rightshift */ |
| 346 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 347 | 6, /* bitsize */ |
| 348 | FALSE, /* pc_relative */ |
| 349 | 6, /* bitpos */ |
| 350 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 351 | mips_elf_shift6_reloc, /* special_function */ |
| 352 | "R_MIPS_SHIFT6", /* name */ |
| 353 | TRUE, /* partial_inplace */ |
| 354 | 0x000007c4, /* src_mask */ |
| 355 | 0x000007c4, /* dst_mask */ |
| 356 | FALSE), /* pcrel_offset */ |
| 357 | |
| 358 | /* A 64 bit relocation. */ |
| 359 | HOWTO (R_MIPS_64, /* type */ |
| 360 | 0, /* rightshift */ |
| 361 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 362 | 64, /* bitsize */ |
| 363 | FALSE, /* pc_relative */ |
| 364 | 0, /* bitpos */ |
| 365 | complain_overflow_dont, /* complain_on_overflow */ |
| 366 | mips_elf_generic_reloc, /* special_function */ |
| 367 | "R_MIPS_64", /* name */ |
| 368 | TRUE, /* partial_inplace */ |
| 369 | MINUS_ONE, /* src_mask */ |
| 370 | MINUS_ONE, /* dst_mask */ |
| 371 | FALSE), /* pcrel_offset */ |
| 372 | |
| 373 | /* Displacement in the global offset table. */ |
| 374 | HOWTO (R_MIPS_GOT_DISP, /* type */ |
| 375 | 0, /* rightshift */ |
| 376 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 377 | 16, /* bitsize */ |
| 378 | FALSE, /* pc_relative */ |
| 379 | 0, /* bitpos */ |
| 380 | complain_overflow_signed, /* complain_on_overflow */ |
| 381 | mips_elf_generic_reloc, /* special_function */ |
| 382 | "R_MIPS_GOT_DISP", /* name */ |
| 383 | TRUE, /* partial_inplace */ |
| 384 | 0x0000ffff, /* src_mask */ |
| 385 | 0x0000ffff, /* dst_mask */ |
| 386 | FALSE), /* pcrel_offset */ |
| 387 | |
| 388 | /* Displacement to page pointer in the global offset table. */ |
| 389 | HOWTO (R_MIPS_GOT_PAGE, /* type */ |
| 390 | 0, /* rightshift */ |
| 391 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 392 | 16, /* bitsize */ |
| 393 | FALSE, /* pc_relative */ |
| 394 | 0, /* bitpos */ |
| 395 | complain_overflow_signed, /* complain_on_overflow */ |
| 396 | mips_elf_generic_reloc, /* special_function */ |
| 397 | "R_MIPS_GOT_PAGE", /* name */ |
| 398 | TRUE, /* partial_inplace */ |
| 399 | 0x0000ffff, /* src_mask */ |
| 400 | 0x0000ffff, /* dst_mask */ |
| 401 | FALSE), /* pcrel_offset */ |
| 402 | |
| 403 | /* Offset from page pointer in the global offset table. */ |
| 404 | HOWTO (R_MIPS_GOT_OFST, /* type */ |
| 405 | 0, /* rightshift */ |
| 406 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 407 | 16, /* bitsize */ |
| 408 | FALSE, /* pc_relative */ |
| 409 | 0, /* bitpos */ |
| 410 | complain_overflow_signed, /* complain_on_overflow */ |
| 411 | mips_elf_generic_reloc, /* special_function */ |
| 412 | "R_MIPS_GOT_OFST", /* name */ |
| 413 | TRUE, /* partial_inplace */ |
| 414 | 0x0000ffff, /* src_mask */ |
| 415 | 0x0000ffff, /* dst_mask */ |
| 416 | FALSE), /* pcrel_offset */ |
| 417 | |
| 418 | /* High 16 bits of displacement in global offset table. */ |
| 419 | HOWTO (R_MIPS_GOT_HI16, /* type */ |
| 420 | 0, /* rightshift */ |
| 421 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 422 | 16, /* bitsize */ |
| 423 | FALSE, /* pc_relative */ |
| 424 | 0, /* bitpos */ |
| 425 | complain_overflow_dont, /* complain_on_overflow */ |
| 426 | mips_elf_generic_reloc, /* special_function */ |
| 427 | "R_MIPS_GOT_HI16", /* name */ |
| 428 | TRUE, /* partial_inplace */ |
| 429 | 0x0000ffff, /* src_mask */ |
| 430 | 0x0000ffff, /* dst_mask */ |
| 431 | FALSE), /* pcrel_offset */ |
| 432 | |
| 433 | /* Low 16 bits of displacement in global offset table. */ |
| 434 | HOWTO (R_MIPS_GOT_LO16, /* type */ |
| 435 | 0, /* rightshift */ |
| 436 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 437 | 16, /* bitsize */ |
| 438 | FALSE, /* pc_relative */ |
| 439 | 0, /* bitpos */ |
| 440 | complain_overflow_dont, /* complain_on_overflow */ |
| 441 | mips_elf_generic_reloc, /* special_function */ |
| 442 | "R_MIPS_GOT_LO16", /* name */ |
| 443 | TRUE, /* partial_inplace */ |
| 444 | 0x0000ffff, /* src_mask */ |
| 445 | 0x0000ffff, /* dst_mask */ |
| 446 | FALSE), /* pcrel_offset */ |
| 447 | |
| 448 | /* 64 bit subtraction. */ |
| 449 | HOWTO (R_MIPS_SUB, /* type */ |
| 450 | 0, /* rightshift */ |
| 451 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 452 | 64, /* bitsize */ |
| 453 | FALSE, /* pc_relative */ |
| 454 | 0, /* bitpos */ |
| 455 | complain_overflow_dont, /* complain_on_overflow */ |
| 456 | mips_elf_generic_reloc, /* special_function */ |
| 457 | "R_MIPS_SUB", /* name */ |
| 458 | TRUE, /* partial_inplace */ |
| 459 | MINUS_ONE, /* src_mask */ |
| 460 | MINUS_ONE, /* dst_mask */ |
| 461 | FALSE), /* pcrel_offset */ |
| 462 | |
| 463 | /* Insert the addend as an instruction. */ |
| 464 | /* FIXME: Not handled correctly. */ |
| 465 | HOWTO (R_MIPS_INSERT_A, /* type */ |
| 466 | 0, /* rightshift */ |
| 467 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 468 | 32, /* bitsize */ |
| 469 | FALSE, /* pc_relative */ |
| 470 | 0, /* bitpos */ |
| 471 | complain_overflow_dont, /* complain_on_overflow */ |
| 472 | mips_elf_generic_reloc, /* special_function */ |
| 473 | "R_MIPS_INSERT_A", /* name */ |
| 474 | TRUE, /* partial_inplace */ |
| 475 | 0xffffffff, /* src_mask */ |
| 476 | 0xffffffff, /* dst_mask */ |
| 477 | FALSE), /* pcrel_offset */ |
| 478 | |
| 479 | /* Insert the addend as an instruction, and change all relocations |
| 480 | to refer to the old instruction at the address. */ |
| 481 | /* FIXME: Not handled correctly. */ |
| 482 | HOWTO (R_MIPS_INSERT_B, /* type */ |
| 483 | 0, /* rightshift */ |
| 484 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 485 | 32, /* bitsize */ |
| 486 | FALSE, /* pc_relative */ |
| 487 | 0, /* bitpos */ |
| 488 | complain_overflow_dont, /* complain_on_overflow */ |
| 489 | mips_elf_generic_reloc, /* special_function */ |
| 490 | "R_MIPS_INSERT_B", /* name */ |
| 491 | TRUE, /* partial_inplace */ |
| 492 | 0xffffffff, /* src_mask */ |
| 493 | 0xffffffff, /* dst_mask */ |
| 494 | FALSE), /* pcrel_offset */ |
| 495 | |
| 496 | /* Delete a 32 bit instruction. */ |
| 497 | /* FIXME: Not handled correctly. */ |
| 498 | HOWTO (R_MIPS_DELETE, /* type */ |
| 499 | 0, /* rightshift */ |
| 500 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 501 | 32, /* bitsize */ |
| 502 | FALSE, /* pc_relative */ |
| 503 | 0, /* bitpos */ |
| 504 | complain_overflow_dont, /* complain_on_overflow */ |
| 505 | mips_elf_generic_reloc, /* special_function */ |
| 506 | "R_MIPS_DELETE", /* name */ |
| 507 | TRUE, /* partial_inplace */ |
| 508 | 0xffffffff, /* src_mask */ |
| 509 | 0xffffffff, /* dst_mask */ |
| 510 | FALSE), /* pcrel_offset */ |
| 511 | |
| 512 | /* The MIPS ELF64 ABI Draft wants us to support these for REL relocations. |
| 513 | We don't, because |
| 514 | a) It means building the addend from a R_MIPS_HIGHEST/R_MIPS_HIGHER/ |
| 515 | R_MIPS_HI16/R_MIPS_LO16 sequence with varying ordering, using |
| 516 | fallable heuristics. |
| 517 | b) No other NEwABI toolchain actually emits such relocations. */ |
| 518 | EMPTY_HOWTO (R_MIPS_HIGHER), |
| 519 | EMPTY_HOWTO (R_MIPS_HIGHEST), |
| 520 | |
| 521 | /* High 16 bits of displacement in global offset table. */ |
| 522 | HOWTO (R_MIPS_CALL_HI16, /* type */ |
| 523 | 0, /* rightshift */ |
| 524 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 525 | 16, /* bitsize */ |
| 526 | FALSE, /* pc_relative */ |
| 527 | 0, /* bitpos */ |
| 528 | complain_overflow_dont, /* complain_on_overflow */ |
| 529 | mips_elf_generic_reloc, /* special_function */ |
| 530 | "R_MIPS_CALL_HI16", /* name */ |
| 531 | TRUE, /* partial_inplace */ |
| 532 | 0x0000ffff, /* src_mask */ |
| 533 | 0x0000ffff, /* dst_mask */ |
| 534 | FALSE), /* pcrel_offset */ |
| 535 | |
| 536 | /* Low 16 bits of displacement in global offset table. */ |
| 537 | HOWTO (R_MIPS_CALL_LO16, /* type */ |
| 538 | 0, /* rightshift */ |
| 539 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 540 | 16, /* bitsize */ |
| 541 | FALSE, /* pc_relative */ |
| 542 | 0, /* bitpos */ |
| 543 | complain_overflow_dont, /* complain_on_overflow */ |
| 544 | mips_elf_generic_reloc, /* special_function */ |
| 545 | "R_MIPS_CALL_LO16", /* name */ |
| 546 | TRUE, /* partial_inplace */ |
| 547 | 0x0000ffff, /* src_mask */ |
| 548 | 0x0000ffff, /* dst_mask */ |
| 549 | FALSE), /* pcrel_offset */ |
| 550 | |
| 551 | /* Section displacement. */ |
| 552 | HOWTO (R_MIPS_SCN_DISP, /* 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 | mips_elf_generic_reloc, /* special_function */ |
| 560 | "R_MIPS_SCN_DISP", /* name */ |
| 561 | TRUE, /* partial_inplace */ |
| 562 | 0xffffffff, /* src_mask */ |
| 563 | 0xffffffff, /* dst_mask */ |
| 564 | FALSE), /* pcrel_offset */ |
| 565 | |
| 566 | HOWTO (R_MIPS_REL16, /* type */ |
| 567 | 0, /* rightshift */ |
| 568 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 569 | 16, /* bitsize */ |
| 570 | FALSE, /* pc_relative */ |
| 571 | 0, /* bitpos */ |
| 572 | complain_overflow_signed, /* complain_on_overflow */ |
| 573 | mips_elf_generic_reloc, /* special_function */ |
| 574 | "R_MIPS_REL16", /* name */ |
| 575 | TRUE, /* partial_inplace */ |
| 576 | 0xffff, /* src_mask */ |
| 577 | 0xffff, /* dst_mask */ |
| 578 | FALSE), /* pcrel_offset */ |
| 579 | |
| 580 | /* These two are obsolete. */ |
| 581 | EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE), |
| 582 | EMPTY_HOWTO (R_MIPS_PJUMP), |
| 583 | |
| 584 | /* Similiar to R_MIPS_REL32, but used for relocations in a GOT section. |
| 585 | It must be used for multigot GOT's (and only there). */ |
| 586 | HOWTO (R_MIPS_RELGOT, /* type */ |
| 587 | 0, /* rightshift */ |
| 588 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 589 | 32, /* bitsize */ |
| 590 | FALSE, /* pc_relative */ |
| 591 | 0, /* bitpos */ |
| 592 | complain_overflow_dont, /* complain_on_overflow */ |
| 593 | mips_elf_generic_reloc, /* special_function */ |
| 594 | "R_MIPS_RELGOT", /* name */ |
| 595 | TRUE, /* partial_inplace */ |
| 596 | 0xffffffff, /* src_mask */ |
| 597 | 0xffffffff, /* dst_mask */ |
| 598 | FALSE), /* pcrel_offset */ |
| 599 | |
| 600 | /* Protected jump conversion. This is an optimization hint. No |
| 601 | relocation is required for correctness. */ |
| 602 | HOWTO (R_MIPS_JALR, /* type */ |
| 603 | 0, /* rightshift */ |
| 604 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 605 | 32, /* bitsize */ |
| 606 | FALSE, /* pc_relative */ |
| 607 | 0, /* bitpos */ |
| 608 | complain_overflow_dont, /* complain_on_overflow */ |
| 609 | mips_elf_generic_reloc, /* special_function */ |
| 610 | "R_MIPS_JALR", /* name */ |
| 611 | FALSE, /* partial_inplace */ |
| 612 | 0x00000000, /* src_mask */ |
| 613 | 0x00000000, /* dst_mask */ |
| 614 | FALSE), /* pcrel_offset */ |
| 615 | }; |
| 616 | |
| 617 | /* The relocation table used for SHT_RELA sections. */ |
| 618 | |
| 619 | static reloc_howto_type elf_mips_howto_table_rela[] = |
| 620 | { |
| 621 | /* No relocation. */ |
| 622 | HOWTO (R_MIPS_NONE, /* type */ |
| 623 | 0, /* rightshift */ |
| 624 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 625 | 0, /* bitsize */ |
| 626 | FALSE, /* pc_relative */ |
| 627 | 0, /* bitpos */ |
| 628 | complain_overflow_dont, /* complain_on_overflow */ |
| 629 | mips_elf_generic_reloc, /* special_function */ |
| 630 | "R_MIPS_NONE", /* name */ |
| 631 | FALSE, /* partial_inplace */ |
| 632 | 0, /* src_mask */ |
| 633 | 0, /* dst_mask */ |
| 634 | FALSE), /* pcrel_offset */ |
| 635 | |
| 636 | /* 16 bit relocation. */ |
| 637 | HOWTO (R_MIPS_16, /* type */ |
| 638 | 0, /* rightshift */ |
| 639 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 640 | 16, /* bitsize */ |
| 641 | FALSE, /* pc_relative */ |
| 642 | 0, /* bitpos */ |
| 643 | complain_overflow_signed, /* complain_on_overflow */ |
| 644 | mips_elf_generic_reloc, /* special_function */ |
| 645 | "R_MIPS_16", /* name */ |
| 646 | FALSE, /* partial_inplace */ |
| 647 | 0, /* src_mask */ |
| 648 | 0x0000, /* dst_mask */ |
| 649 | FALSE), /* pcrel_offset */ |
| 650 | |
| 651 | /* 32 bit relocation. */ |
| 652 | HOWTO (R_MIPS_32, /* type */ |
| 653 | 0, /* rightshift */ |
| 654 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 655 | 32, /* bitsize */ |
| 656 | FALSE, /* pc_relative */ |
| 657 | 0, /* bitpos */ |
| 658 | complain_overflow_dont, /* complain_on_overflow */ |
| 659 | mips_elf_generic_reloc, /* special_function */ |
| 660 | "R_MIPS_32", /* name */ |
| 661 | FALSE, /* partial_inplace */ |
| 662 | 0, /* src_mask */ |
| 663 | 0xffffffff, /* dst_mask */ |
| 664 | FALSE), /* pcrel_offset */ |
| 665 | |
| 666 | /* 32 bit symbol relative relocation. */ |
| 667 | HOWTO (R_MIPS_REL32, /* type */ |
| 668 | 0, /* rightshift */ |
| 669 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 670 | 32, /* bitsize */ |
| 671 | FALSE, /* pc_relative */ |
| 672 | 0, /* bitpos */ |
| 673 | complain_overflow_dont, /* complain_on_overflow */ |
| 674 | mips_elf_generic_reloc, /* special_function */ |
| 675 | "R_MIPS_REL32", /* name */ |
| 676 | FALSE, /* partial_inplace */ |
| 677 | 0, /* src_mask */ |
| 678 | 0xffffffff, /* dst_mask */ |
| 679 | FALSE), /* pcrel_offset */ |
| 680 | |
| 681 | /* 26 bit jump address. */ |
| 682 | HOWTO (R_MIPS_26, /* type */ |
| 683 | 2, /* rightshift */ |
| 684 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 685 | 26, /* bitsize */ |
| 686 | FALSE, /* pc_relative */ |
| 687 | 0, /* bitpos */ |
| 688 | complain_overflow_dont, /* complain_on_overflow */ |
| 689 | /* This needs complex overflow |
| 690 | detection, because the upper 36 |
| 691 | bits must match the PC + 4. */ |
| 692 | mips_elf_generic_reloc, /* special_function */ |
| 693 | "R_MIPS_26", /* name */ |
| 694 | FALSE, /* partial_inplace */ |
| 695 | 0, /* src_mask */ |
| 696 | 0x03ffffff, /* dst_mask */ |
| 697 | FALSE), /* pcrel_offset */ |
| 698 | |
| 699 | /* High 16 bits of symbol value. */ |
| 700 | HOWTO (R_MIPS_HI16, /* type */ |
| 701 | 0, /* rightshift */ |
| 702 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 703 | 16, /* bitsize */ |
| 704 | FALSE, /* pc_relative */ |
| 705 | 0, /* bitpos */ |
| 706 | complain_overflow_dont, /* complain_on_overflow */ |
| 707 | mips_elf_generic_reloc, /* special_function */ |
| 708 | "R_MIPS_HI16", /* name */ |
| 709 | FALSE, /* partial_inplace */ |
| 710 | 0, /* src_mask */ |
| 711 | 0x0000ffff, /* dst_mask */ |
| 712 | FALSE), /* pcrel_offset */ |
| 713 | |
| 714 | /* Low 16 bits of symbol value. */ |
| 715 | HOWTO (R_MIPS_LO16, /* type */ |
| 716 | 0, /* rightshift */ |
| 717 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 718 | 16, /* bitsize */ |
| 719 | FALSE, /* pc_relative */ |
| 720 | 0, /* bitpos */ |
| 721 | complain_overflow_dont, /* complain_on_overflow */ |
| 722 | mips_elf_generic_reloc, /* special_function */ |
| 723 | "R_MIPS_LO16", /* name */ |
| 724 | FALSE, /* partial_inplace */ |
| 725 | 0, /* src_mask */ |
| 726 | 0x0000ffff, /* dst_mask */ |
| 727 | FALSE), /* pcrel_offset */ |
| 728 | |
| 729 | /* GP relative reference. */ |
| 730 | HOWTO (R_MIPS_GPREL16, /* type */ |
| 731 | 0, /* rightshift */ |
| 732 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 733 | 16, /* bitsize */ |
| 734 | FALSE, /* pc_relative */ |
| 735 | 0, /* bitpos */ |
| 736 | complain_overflow_signed, /* complain_on_overflow */ |
| 737 | mips_elf_gprel16_reloc, /* special_function */ |
| 738 | "R_MIPS_GPREL16", /* name */ |
| 739 | FALSE, /* partial_inplace */ |
| 740 | 0, /* src_mask */ |
| 741 | 0x0000ffff, /* dst_mask */ |
| 742 | FALSE), /* pcrel_offset */ |
| 743 | |
| 744 | /* Reference to literal section. */ |
| 745 | HOWTO (R_MIPS_LITERAL, /* type */ |
| 746 | 0, /* rightshift */ |
| 747 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 748 | 16, /* bitsize */ |
| 749 | FALSE, /* pc_relative */ |
| 750 | 0, /* bitpos */ |
| 751 | complain_overflow_signed, /* complain_on_overflow */ |
| 752 | mips_elf_literal_reloc, /* special_function */ |
| 753 | "R_MIPS_LITERAL", /* name */ |
| 754 | FALSE, /* partial_inplace */ |
| 755 | 0, /* src_mask */ |
| 756 | 0x0000ffff, /* dst_mask */ |
| 757 | FALSE), /* pcrel_offset */ |
| 758 | |
| 759 | /* Reference to global offset table. */ |
| 760 | HOWTO (R_MIPS_GOT16, /* type */ |
| 761 | 0, /* rightshift */ |
| 762 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 763 | 16, /* bitsize */ |
| 764 | FALSE, /* pc_relative */ |
| 765 | 0, /* bitpos */ |
| 766 | complain_overflow_signed, /* complain_on_overflow */ |
| 767 | mips_elf_got16_reloc, /* special_function */ |
| 768 | "R_MIPS_GOT16", /* name */ |
| 769 | FALSE, /* partial_inplace */ |
| 770 | 0, /* src_mask */ |
| 771 | 0x0000ffff, /* dst_mask */ |
| 772 | FALSE), /* pcrel_offset */ |
| 773 | |
| 774 | /* 16 bit PC relative reference. */ |
| 775 | HOWTO (R_MIPS_PC16, /* type */ |
| 776 | 0, /* rightshift */ |
| 777 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 778 | 16, /* bitsize */ |
| 779 | TRUE, /* pc_relative */ |
| 780 | 0, /* bitpos */ |
| 781 | complain_overflow_signed, /* complain_on_overflow */ |
| 782 | mips_elf_generic_reloc, /* special_function */ |
| 783 | "R_MIPS_PC16", /* name */ |
| 784 | FALSE, /* partial_inplace */ |
| 785 | 0, /* src_mask */ |
| 786 | 0x0000ffff, /* dst_mask */ |
| 787 | TRUE), /* pcrel_offset */ |
| 788 | |
| 789 | /* 16 bit call through global offset table. */ |
| 790 | HOWTO (R_MIPS_CALL16, /* type */ |
| 791 | 0, /* rightshift */ |
| 792 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 793 | 16, /* bitsize */ |
| 794 | FALSE, /* pc_relative */ |
| 795 | 0, /* bitpos */ |
| 796 | complain_overflow_signed, /* complain_on_overflow */ |
| 797 | mips_elf_generic_reloc, /* special_function */ |
| 798 | "R_MIPS_CALL16", /* name */ |
| 799 | FALSE, /* partial_inplace */ |
| 800 | 0, /* src_mask */ |
| 801 | 0x0000ffff, /* dst_mask */ |
| 802 | FALSE), /* pcrel_offset */ |
| 803 | |
| 804 | /* 32 bit GP relative reference. */ |
| 805 | HOWTO (R_MIPS_GPREL32, /* type */ |
| 806 | 0, /* rightshift */ |
| 807 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 808 | 32, /* bitsize */ |
| 809 | FALSE, /* pc_relative */ |
| 810 | 0, /* bitpos */ |
| 811 | complain_overflow_dont, /* complain_on_overflow */ |
| 812 | mips_elf_gprel32_reloc, /* special_function */ |
| 813 | "R_MIPS_GPREL32", /* name */ |
| 814 | FALSE, /* partial_inplace */ |
| 815 | 0, /* src_mask */ |
| 816 | 0xffffffff, /* dst_mask */ |
| 817 | FALSE), /* pcrel_offset */ |
| 818 | |
| 819 | EMPTY_HOWTO (13), |
| 820 | EMPTY_HOWTO (14), |
| 821 | EMPTY_HOWTO (15), |
| 822 | |
| 823 | /* A 5 bit shift field. */ |
| 824 | HOWTO (R_MIPS_SHIFT5, /* type */ |
| 825 | 0, /* rightshift */ |
| 826 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 827 | 5, /* bitsize */ |
| 828 | FALSE, /* pc_relative */ |
| 829 | 6, /* bitpos */ |
| 830 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 831 | mips_elf_generic_reloc, /* special_function */ |
| 832 | "R_MIPS_SHIFT5", /* name */ |
| 833 | FALSE, /* partial_inplace */ |
| 834 | 0, /* src_mask */ |
| 835 | 0x000007c0, /* dst_mask */ |
| 836 | FALSE), /* pcrel_offset */ |
| 837 | |
| 838 | /* A 6 bit shift field. */ |
| 839 | HOWTO (R_MIPS_SHIFT6, /* type */ |
| 840 | 0, /* rightshift */ |
| 841 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 842 | 6, /* bitsize */ |
| 843 | FALSE, /* pc_relative */ |
| 844 | 6, /* bitpos */ |
| 845 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 846 | mips_elf_shift6_reloc, /* special_function */ |
| 847 | "R_MIPS_SHIFT6", /* name */ |
| 848 | FALSE, /* partial_inplace */ |
| 849 | 0, /* src_mask */ |
| 850 | 0x000007c4, /* dst_mask */ |
| 851 | FALSE), /* pcrel_offset */ |
| 852 | |
| 853 | /* 64 bit relocation. */ |
| 854 | HOWTO (R_MIPS_64, /* type */ |
| 855 | 0, /* rightshift */ |
| 856 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 857 | 64, /* bitsize */ |
| 858 | FALSE, /* pc_relative */ |
| 859 | 0, /* bitpos */ |
| 860 | complain_overflow_dont, /* complain_on_overflow */ |
| 861 | mips_elf_generic_reloc, /* special_function */ |
| 862 | "R_MIPS_64", /* name */ |
| 863 | FALSE, /* partial_inplace */ |
| 864 | 0, /* src_mask */ |
| 865 | MINUS_ONE, /* dst_mask */ |
| 866 | FALSE), /* pcrel_offset */ |
| 867 | |
| 868 | /* Displacement in the global offset table. */ |
| 869 | HOWTO (R_MIPS_GOT_DISP, /* type */ |
| 870 | 0, /* rightshift */ |
| 871 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 872 | 16, /* bitsize */ |
| 873 | FALSE, /* pc_relative */ |
| 874 | 0, /* bitpos */ |
| 875 | complain_overflow_signed, /* complain_on_overflow */ |
| 876 | mips_elf_generic_reloc, /* special_function */ |
| 877 | "R_MIPS_GOT_DISP", /* name */ |
| 878 | FALSE, /* partial_inplace */ |
| 879 | 0, /* src_mask */ |
| 880 | 0x0000ffff, /* dst_mask */ |
| 881 | FALSE), /* pcrel_offset */ |
| 882 | |
| 883 | /* Displacement to page pointer in the global offset table. */ |
| 884 | HOWTO (R_MIPS_GOT_PAGE, /* type */ |
| 885 | 0, /* rightshift */ |
| 886 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 887 | 16, /* bitsize */ |
| 888 | FALSE, /* pc_relative */ |
| 889 | 0, /* bitpos */ |
| 890 | complain_overflow_signed, /* complain_on_overflow */ |
| 891 | mips_elf_generic_reloc, /* special_function */ |
| 892 | "R_MIPS_GOT_PAGE", /* name */ |
| 893 | FALSE, /* partial_inplace */ |
| 894 | 0, /* src_mask */ |
| 895 | 0x0000ffff, /* dst_mask */ |
| 896 | FALSE), /* pcrel_offset */ |
| 897 | |
| 898 | /* Offset from page pointer in the global offset table. */ |
| 899 | HOWTO (R_MIPS_GOT_OFST, /* type */ |
| 900 | 0, /* rightshift */ |
| 901 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 902 | 16, /* bitsize */ |
| 903 | FALSE, /* pc_relative */ |
| 904 | 0, /* bitpos */ |
| 905 | complain_overflow_signed, /* complain_on_overflow */ |
| 906 | mips_elf_generic_reloc, /* special_function */ |
| 907 | "R_MIPS_GOT_OFST", /* name */ |
| 908 | FALSE, /* partial_inplace */ |
| 909 | 0, /* src_mask */ |
| 910 | 0x0000ffff, /* dst_mask */ |
| 911 | FALSE), /* pcrel_offset */ |
| 912 | |
| 913 | /* High 16 bits of displacement in global offset table. */ |
| 914 | HOWTO (R_MIPS_GOT_HI16, /* type */ |
| 915 | 0, /* rightshift */ |
| 916 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 917 | 16, /* bitsize */ |
| 918 | FALSE, /* pc_relative */ |
| 919 | 0, /* bitpos */ |
| 920 | complain_overflow_dont, /* complain_on_overflow */ |
| 921 | mips_elf_generic_reloc, /* special_function */ |
| 922 | "R_MIPS_GOT_HI16", /* name */ |
| 923 | FALSE, /* partial_inplace */ |
| 924 | 0, /* src_mask */ |
| 925 | 0x0000ffff, /* dst_mask */ |
| 926 | FALSE), /* pcrel_offset */ |
| 927 | |
| 928 | /* Low 16 bits of displacement in global offset table. */ |
| 929 | HOWTO (R_MIPS_GOT_LO16, /* type */ |
| 930 | 0, /* rightshift */ |
| 931 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 932 | 16, /* bitsize */ |
| 933 | FALSE, /* pc_relative */ |
| 934 | 0, /* bitpos */ |
| 935 | complain_overflow_dont, /* complain_on_overflow */ |
| 936 | mips_elf_generic_reloc, /* special_function */ |
| 937 | "R_MIPS_GOT_LO16", /* name */ |
| 938 | FALSE, /* partial_inplace */ |
| 939 | 0, /* src_mask */ |
| 940 | 0x0000ffff, /* dst_mask */ |
| 941 | FALSE), /* pcrel_offset */ |
| 942 | |
| 943 | /* 64 bit substraction. */ |
| 944 | HOWTO (R_MIPS_SUB, /* type */ |
| 945 | 0, /* rightshift */ |
| 946 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 947 | 64, /* bitsize */ |
| 948 | FALSE, /* pc_relative */ |
| 949 | 0, /* bitpos */ |
| 950 | complain_overflow_dont, /* complain_on_overflow */ |
| 951 | mips_elf_generic_reloc, /* special_function */ |
| 952 | "R_MIPS_SUB", /* name */ |
| 953 | FALSE, /* partial_inplace */ |
| 954 | 0, /* src_mask */ |
| 955 | MINUS_ONE, /* dst_mask */ |
| 956 | FALSE), /* pcrel_offset */ |
| 957 | |
| 958 | /* Insert the addend as an instruction. */ |
| 959 | /* FIXME: Not handled correctly. */ |
| 960 | HOWTO (R_MIPS_INSERT_A, /* type */ |
| 961 | 0, /* rightshift */ |
| 962 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 963 | 32, /* bitsize */ |
| 964 | FALSE, /* pc_relative */ |
| 965 | 0, /* bitpos */ |
| 966 | complain_overflow_dont, /* complain_on_overflow */ |
| 967 | mips_elf_generic_reloc, /* special_function */ |
| 968 | "R_MIPS_INSERT_A", /* name */ |
| 969 | FALSE, /* partial_inplace */ |
| 970 | 0, /* src_mask */ |
| 971 | 0xffffffff, /* dst_mask */ |
| 972 | FALSE), /* pcrel_offset */ |
| 973 | |
| 974 | /* Insert the addend as an instruction, and change all relocations |
| 975 | to refer to the old instruction at the address. */ |
| 976 | /* FIXME: Not handled correctly. */ |
| 977 | HOWTO (R_MIPS_INSERT_B, /* type */ |
| 978 | 0, /* rightshift */ |
| 979 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 980 | 32, /* bitsize */ |
| 981 | FALSE, /* pc_relative */ |
| 982 | 0, /* bitpos */ |
| 983 | complain_overflow_dont, /* complain_on_overflow */ |
| 984 | mips_elf_generic_reloc, /* special_function */ |
| 985 | "R_MIPS_INSERT_B", /* name */ |
| 986 | FALSE, /* partial_inplace */ |
| 987 | 0, /* src_mask */ |
| 988 | 0xffffffff, /* dst_mask */ |
| 989 | FALSE), /* pcrel_offset */ |
| 990 | |
| 991 | /* Delete a 32 bit instruction. */ |
| 992 | /* FIXME: Not handled correctly. */ |
| 993 | HOWTO (R_MIPS_DELETE, /* type */ |
| 994 | 0, /* rightshift */ |
| 995 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 996 | 32, /* bitsize */ |
| 997 | FALSE, /* pc_relative */ |
| 998 | 0, /* bitpos */ |
| 999 | complain_overflow_dont, /* complain_on_overflow */ |
| 1000 | mips_elf_generic_reloc, /* special_function */ |
| 1001 | "R_MIPS_DELETE", /* name */ |
| 1002 | FALSE, /* partial_inplace */ |
| 1003 | 0, /* src_mask */ |
| 1004 | 0xffffffff, /* dst_mask */ |
| 1005 | FALSE), /* pcrel_offset */ |
| 1006 | |
| 1007 | /* Get the higher value of a 64 bit addend. */ |
| 1008 | HOWTO (R_MIPS_HIGHER, /* type */ |
| 1009 | 0, /* rightshift */ |
| 1010 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1011 | 16, /* bitsize */ |
| 1012 | FALSE, /* pc_relative */ |
| 1013 | 0, /* bitpos */ |
| 1014 | complain_overflow_dont, /* complain_on_overflow */ |
| 1015 | mips_elf_generic_reloc, /* special_function */ |
| 1016 | "R_MIPS_HIGHER", /* name */ |
| 1017 | FALSE, /* partial_inplace */ |
| 1018 | 0, /* src_mask */ |
| 1019 | 0x0000ffff, /* dst_mask */ |
| 1020 | FALSE), /* pcrel_offset */ |
| 1021 | |
| 1022 | /* Get the highest value of a 64 bit addend. */ |
| 1023 | HOWTO (R_MIPS_HIGHEST, /* type */ |
| 1024 | 0, /* rightshift */ |
| 1025 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1026 | 16, /* bitsize */ |
| 1027 | FALSE, /* pc_relative */ |
| 1028 | 0, /* bitpos */ |
| 1029 | complain_overflow_dont, /* complain_on_overflow */ |
| 1030 | mips_elf_generic_reloc, /* special_function */ |
| 1031 | "R_MIPS_HIGHEST", /* name */ |
| 1032 | FALSE, /* partial_inplace */ |
| 1033 | 0, /* src_mask */ |
| 1034 | 0x0000ffff, /* dst_mask */ |
| 1035 | FALSE), /* pcrel_offset */ |
| 1036 | |
| 1037 | /* High 16 bits of displacement in global offset table. */ |
| 1038 | HOWTO (R_MIPS_CALL_HI16, /* type */ |
| 1039 | 0, /* rightshift */ |
| 1040 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1041 | 16, /* bitsize */ |
| 1042 | FALSE, /* pc_relative */ |
| 1043 | 0, /* bitpos */ |
| 1044 | complain_overflow_dont, /* complain_on_overflow */ |
| 1045 | mips_elf_generic_reloc, /* special_function */ |
| 1046 | "R_MIPS_CALL_HI16", /* name */ |
| 1047 | FALSE, /* partial_inplace */ |
| 1048 | 0, /* src_mask */ |
| 1049 | 0x0000ffff, /* dst_mask */ |
| 1050 | FALSE), /* pcrel_offset */ |
| 1051 | |
| 1052 | /* Low 16 bits of displacement in global offset table. */ |
| 1053 | HOWTO (R_MIPS_CALL_LO16, /* type */ |
| 1054 | 0, /* rightshift */ |
| 1055 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1056 | 16, /* bitsize */ |
| 1057 | FALSE, /* pc_relative */ |
| 1058 | 0, /* bitpos */ |
| 1059 | complain_overflow_dont, /* complain_on_overflow */ |
| 1060 | mips_elf_generic_reloc, /* special_function */ |
| 1061 | "R_MIPS_CALL_LO16", /* name */ |
| 1062 | FALSE, /* partial_inplace */ |
| 1063 | 0, /* src_mask */ |
| 1064 | 0x0000ffff, /* dst_mask */ |
| 1065 | FALSE), /* pcrel_offset */ |
| 1066 | |
| 1067 | /* Section displacement, used by an associated event location section. */ |
| 1068 | HOWTO (R_MIPS_SCN_DISP, /* type */ |
| 1069 | 0, /* rightshift */ |
| 1070 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1071 | 32, /* bitsize */ |
| 1072 | FALSE, /* pc_relative */ |
| 1073 | 0, /* bitpos */ |
| 1074 | complain_overflow_dont, /* complain_on_overflow */ |
| 1075 | mips_elf_generic_reloc, /* special_function */ |
| 1076 | "R_MIPS_SCN_DISP", /* name */ |
| 1077 | FALSE, /* partial_inplace */ |
| 1078 | 0, /* src_mask */ |
| 1079 | 0xffffffff, /* dst_mask */ |
| 1080 | FALSE), /* pcrel_offset */ |
| 1081 | |
| 1082 | /* 16 bit relocation. */ |
| 1083 | HOWTO (R_MIPS_REL16, /* type */ |
| 1084 | 0, /* rightshift */ |
| 1085 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1086 | 16, /* bitsize */ |
| 1087 | FALSE, /* pc_relative */ |
| 1088 | 0, /* bitpos */ |
| 1089 | complain_overflow_signed, /* complain_on_overflow */ |
| 1090 | mips_elf_generic_reloc, /* special_function */ |
| 1091 | "R_MIPS_REL16", /* name */ |
| 1092 | FALSE, /* partial_inplace */ |
| 1093 | 0, /* src_mask */ |
| 1094 | 0xffff, /* dst_mask */ |
| 1095 | FALSE), /* pcrel_offset */ |
| 1096 | |
| 1097 | /* These two are obsolete. */ |
| 1098 | EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE), |
| 1099 | EMPTY_HOWTO (R_MIPS_PJUMP), |
| 1100 | |
| 1101 | /* Similiar to R_MIPS_REL32, but used for relocations in a GOT section. |
| 1102 | It must be used for multigot GOT's (and only there). */ |
| 1103 | HOWTO (R_MIPS_RELGOT, /* type */ |
| 1104 | 0, /* rightshift */ |
| 1105 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1106 | 32, /* bitsize */ |
| 1107 | FALSE, /* pc_relative */ |
| 1108 | 0, /* bitpos */ |
| 1109 | complain_overflow_dont, /* complain_on_overflow */ |
| 1110 | mips_elf_generic_reloc, /* special_function */ |
| 1111 | "R_MIPS_RELGOT", /* name */ |
| 1112 | FALSE, /* partial_inplace */ |
| 1113 | 0, /* src_mask */ |
| 1114 | 0xffffffff, /* dst_mask */ |
| 1115 | FALSE), /* pcrel_offset */ |
| 1116 | |
| 1117 | /* Protected jump conversion. This is an optimization hint. No |
| 1118 | relocation is required for correctness. */ |
| 1119 | HOWTO (R_MIPS_JALR, /* type */ |
| 1120 | 0, /* rightshift */ |
| 1121 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1122 | 32, /* bitsize */ |
| 1123 | FALSE, /* pc_relative */ |
| 1124 | 0, /* bitpos */ |
| 1125 | complain_overflow_dont, /* complain_on_overflow */ |
| 1126 | mips_elf_generic_reloc, /* special_function */ |
| 1127 | "R_MIPS_JALR", /* name */ |
| 1128 | FALSE, /* partial_inplace */ |
| 1129 | 0, /* src_mask */ |
| 1130 | 0xffffffff, /* dst_mask */ |
| 1131 | FALSE), /* pcrel_offset */ |
| 1132 | }; |
| 1133 | |
| 1134 | /* The reloc used for the mips16 jump instruction. */ |
| 1135 | static reloc_howto_type elf_mips16_jump_howto = |
| 1136 | HOWTO (R_MIPS16_26, /* type */ |
| 1137 | 2, /* rightshift */ |
| 1138 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1139 | 26, /* bitsize */ |
| 1140 | FALSE, /* pc_relative */ |
| 1141 | 0, /* bitpos */ |
| 1142 | complain_overflow_dont, /* complain_on_overflow */ |
| 1143 | /* This needs complex overflow |
| 1144 | detection, because the upper four |
| 1145 | bits must match the PC. */ |
| 1146 | mips16_jump_reloc, /* special_function */ |
| 1147 | "R_MIPS16_26", /* name */ |
| 1148 | TRUE, /* partial_inplace */ |
| 1149 | 0x3ffffff, /* src_mask */ |
| 1150 | 0x3ffffff, /* dst_mask */ |
| 1151 | FALSE); /* pcrel_offset */ |
| 1152 | |
| 1153 | /* The reloc used for the mips16 gprel instruction. */ |
| 1154 | static reloc_howto_type elf_mips16_gprel_howto = |
| 1155 | HOWTO (R_MIPS16_GPREL, /* type */ |
| 1156 | 0, /* rightshift */ |
| 1157 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1158 | 16, /* bitsize */ |
| 1159 | FALSE, /* pc_relative */ |
| 1160 | 0, /* bitpos */ |
| 1161 | complain_overflow_signed, /* complain_on_overflow */ |
| 1162 | mips16_gprel_reloc, /* special_function */ |
| 1163 | "R_MIPS16_GPREL", /* name */ |
| 1164 | TRUE, /* partial_inplace */ |
| 1165 | 0x07ff001f, /* src_mask */ |
| 1166 | 0x07ff001f, /* dst_mask */ |
| 1167 | FALSE); /* pcrel_offset */ |
| 1168 | |
| 1169 | /* GNU extension to record C++ vtable hierarchy */ |
| 1170 | static reloc_howto_type elf_mips_gnu_vtinherit_howto = |
| 1171 | HOWTO (R_MIPS_GNU_VTINHERIT, /* type */ |
| 1172 | 0, /* rightshift */ |
| 1173 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1174 | 0, /* bitsize */ |
| 1175 | FALSE, /* pc_relative */ |
| 1176 | 0, /* bitpos */ |
| 1177 | complain_overflow_dont, /* complain_on_overflow */ |
| 1178 | NULL, /* special_function */ |
| 1179 | "R_MIPS_GNU_VTINHERIT", /* name */ |
| 1180 | FALSE, /* partial_inplace */ |
| 1181 | 0, /* src_mask */ |
| 1182 | 0, /* dst_mask */ |
| 1183 | FALSE); /* pcrel_offset */ |
| 1184 | |
| 1185 | /* GNU extension to record C++ vtable member usage */ |
| 1186 | static reloc_howto_type elf_mips_gnu_vtentry_howto = |
| 1187 | HOWTO (R_MIPS_GNU_VTENTRY, /* type */ |
| 1188 | 0, /* rightshift */ |
| 1189 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1190 | 0, /* bitsize */ |
| 1191 | FALSE, /* pc_relative */ |
| 1192 | 0, /* bitpos */ |
| 1193 | complain_overflow_dont, /* complain_on_overflow */ |
| 1194 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 1195 | "R_MIPS_GNU_VTENTRY", /* name */ |
| 1196 | FALSE, /* partial_inplace */ |
| 1197 | 0, /* src_mask */ |
| 1198 | 0, /* dst_mask */ |
| 1199 | FALSE); /* pcrel_offset */ |
| 1200 | \f |
| 1201 | /* This is derived from bfd_elf_generic_reloc. NewABI allows us to have |
| 1202 | several relocations against the same address. The addend is derived |
| 1203 | from the addends of preceding relocations. If we don't need to |
| 1204 | do something special, we simply keep track of the addend. */ |
| 1205 | |
| 1206 | #define GET_RELOC_ADDEND(obfd, sym, entry, sec) \ |
| 1207 | { \ |
| 1208 | /* If we're relocating, and this is an external symbol, we don't \ |
| 1209 | want to change anything. */ \ |
| 1210 | if (obfd != (bfd *) NULL \ |
| 1211 | && (sym->flags & BSF_SECTION_SYM) == 0 \ |
| 1212 | && (! entry->howto->partial_inplace \ |
| 1213 | || entry->addend == 0)) \ |
| 1214 | { \ |
| 1215 | entry->address += sec->output_offset; \ |
| 1216 | return bfd_reloc_ok; \ |
| 1217 | } \ |
| 1218 | \ |
| 1219 | /* The addend of combined relocs is remembered and left for \ |
| 1220 | subsequent relocs. */ \ |
| 1221 | if (prev_reloc_address != reloc_entry->address) \ |
| 1222 | { \ |
| 1223 | prev_reloc_address = reloc_entry->address; \ |
| 1224 | prev_reloc_addend = reloc_entry->addend; \ |
| 1225 | } \ |
| 1226 | else \ |
| 1227 | reloc_entry->addend = prev_reloc_addend; \ |
| 1228 | } |
| 1229 | |
| 1230 | #define SET_RELOC_ADDEND(entry) \ |
| 1231 | { \ |
| 1232 | prev_reloc_addend = entry->addend; \ |
| 1233 | } |
| 1234 | |
| 1235 | static bfd_reloc_status_type |
| 1236 | mips_elf_generic_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1237 | output_bfd, error_message) |
| 1238 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1239 | arelent *reloc_entry; |
| 1240 | asymbol *symbol; |
| 1241 | PTR data ATTRIBUTE_UNUSED; |
| 1242 | asection *input_section; |
| 1243 | bfd *output_bfd; |
| 1244 | char **error_message ATTRIBUTE_UNUSED; |
| 1245 | { |
| 1246 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) |
| 1247 | |
| 1248 | return bfd_reloc_continue; |
| 1249 | } |
| 1250 | \f |
| 1251 | /* Do a R_MIPS_HI16 relocation. This has to be done in combination |
| 1252 | with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to |
| 1253 | the HI16. Here we just save the information we need; we do the |
| 1254 | actual relocation when we see the LO16. |
| 1255 | |
| 1256 | MIPS ELF requires that the LO16 immediately follow the HI16. As a |
| 1257 | GNU extension, for non-pc-relative relocations, we permit an |
| 1258 | arbitrary number of HI16 relocs to be associated with a single LO16 |
| 1259 | reloc. This extension permits gcc to output the HI and LO relocs |
| 1260 | itself. |
| 1261 | |
| 1262 | This cannot be done for PC-relative relocations because both the HI16 |
| 1263 | and LO16 parts of the relocations must be done relative to the LO16 |
| 1264 | part, and there can be carry to or borrow from the HI16 part. */ |
| 1265 | |
| 1266 | struct mips_hi16 |
| 1267 | { |
| 1268 | struct mips_hi16 *next; |
| 1269 | bfd_byte *addr; |
| 1270 | bfd_vma addend; |
| 1271 | }; |
| 1272 | |
| 1273 | /* FIXME: This should not be a static variable. */ |
| 1274 | |
| 1275 | static struct mips_hi16 *mips_hi16_list; |
| 1276 | |
| 1277 | static bfd_reloc_status_type |
| 1278 | mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1279 | output_bfd, error_message) |
| 1280 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1281 | arelent *reloc_entry; |
| 1282 | asymbol *symbol; |
| 1283 | PTR data; |
| 1284 | asection *input_section; |
| 1285 | bfd *output_bfd; |
| 1286 | char **error_message ATTRIBUTE_UNUSED; |
| 1287 | { |
| 1288 | bfd_reloc_status_type ret; |
| 1289 | bfd_vma relocation; |
| 1290 | struct mips_hi16 *n; |
| 1291 | |
| 1292 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) |
| 1293 | |
| 1294 | ret = bfd_reloc_ok; |
| 1295 | |
| 1296 | if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL) |
| 1297 | ret = bfd_reloc_undefined; |
| 1298 | |
| 1299 | if (bfd_is_com_section (symbol->section)) |
| 1300 | relocation = 0; |
| 1301 | else |
| 1302 | relocation = symbol->value; |
| 1303 | |
| 1304 | relocation += symbol->section->output_section->vma; |
| 1305 | relocation += symbol->section->output_offset; |
| 1306 | relocation += reloc_entry->addend; |
| 1307 | |
| 1308 | if (reloc_entry->address > input_section->_cooked_size) |
| 1309 | return bfd_reloc_outofrange; |
| 1310 | |
| 1311 | /* Save the information, and let LO16 do the actual relocation. */ |
| 1312 | n = (struct mips_hi16 *) bfd_malloc ((bfd_size_type) sizeof *n); |
| 1313 | if (n == NULL) |
| 1314 | return bfd_reloc_outofrange; |
| 1315 | n->addr = (bfd_byte *) data + reloc_entry->address; |
| 1316 | n->addend = relocation; |
| 1317 | n->next = mips_hi16_list; |
| 1318 | mips_hi16_list = n; |
| 1319 | |
| 1320 | if (output_bfd != (bfd *) NULL) |
| 1321 | reloc_entry->address += input_section->output_offset; |
| 1322 | |
| 1323 | return ret; |
| 1324 | } |
| 1325 | |
| 1326 | /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit |
| 1327 | inplace relocation; this function exists in order to do the |
| 1328 | R_MIPS_HI16 relocation described above. */ |
| 1329 | |
| 1330 | static bfd_reloc_status_type |
| 1331 | mips_elf_lo16_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1332 | output_bfd, error_message) |
| 1333 | bfd *abfd; |
| 1334 | arelent *reloc_entry; |
| 1335 | asymbol *symbol; |
| 1336 | PTR data; |
| 1337 | asection *input_section; |
| 1338 | bfd *output_bfd; |
| 1339 | char **error_message; |
| 1340 | { |
| 1341 | if (mips_hi16_list != NULL) |
| 1342 | { |
| 1343 | struct mips_hi16 *l; |
| 1344 | |
| 1345 | l = mips_hi16_list; |
| 1346 | while (l != NULL) |
| 1347 | { |
| 1348 | unsigned long insn; |
| 1349 | unsigned long val; |
| 1350 | unsigned long vallo; |
| 1351 | struct mips_hi16 *next; |
| 1352 | |
| 1353 | /* Do the HI16 relocation. Note that we actually don't need |
| 1354 | to know anything about the LO16 itself, except where to |
| 1355 | find the low 16 bits of the addend needed by the LO16. */ |
| 1356 | insn = bfd_get_32 (abfd, l->addr); |
| 1357 | vallo = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1358 | |
| 1359 | /* The low order 16 bits are always treated as a signed |
| 1360 | value. */ |
| 1361 | vallo = ((vallo & 0xffff) ^ 0x8000) - 0x8000; |
| 1362 | val = ((insn & 0xffff) << 16) + vallo; |
| 1363 | val += l->addend; |
| 1364 | |
| 1365 | /* If PC-relative, we need to subtract out the address of the LO |
| 1366 | half of the HI/LO. (The actual relocation is relative |
| 1367 | to that instruction.) */ |
| 1368 | if (reloc_entry->howto->pc_relative) |
| 1369 | val -= reloc_entry->address; |
| 1370 | |
| 1371 | /* At this point, "val" has the value of the combined HI/LO |
| 1372 | pair. If the low order 16 bits (which will be used for |
| 1373 | the LO16 insn) are negative, then we will need an |
| 1374 | adjustment for the high order 16 bits. */ |
| 1375 | val += 0x8000; |
| 1376 | val = (val >> 16) & 0xffff; |
| 1377 | |
| 1378 | insn &= ~ (bfd_vma) 0xffff; |
| 1379 | insn |= val; |
| 1380 | bfd_put_32 (abfd, (bfd_vma) insn, l->addr); |
| 1381 | |
| 1382 | next = l->next; |
| 1383 | free (l); |
| 1384 | l = next; |
| 1385 | } |
| 1386 | |
| 1387 | mips_hi16_list = NULL; |
| 1388 | } |
| 1389 | |
| 1390 | /* Now do the LO16 reloc in the usual way. */ |
| 1391 | return mips_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1392 | input_section, output_bfd, error_message); |
| 1393 | } |
| 1394 | |
| 1395 | /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset |
| 1396 | table used for PIC code. If the symbol is an external symbol, the |
| 1397 | instruction is modified to contain the offset of the appropriate |
| 1398 | entry in the global offset table. If the symbol is a section |
| 1399 | symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit |
| 1400 | addends are combined to form the real addend against the section |
| 1401 | symbol; the GOT16 is modified to contain the offset of an entry in |
| 1402 | the global offset table, and the LO16 is modified to offset it |
| 1403 | appropriately. Thus an offset larger than 16 bits requires a |
| 1404 | modified value in the global offset table. |
| 1405 | |
| 1406 | This implementation suffices for the assembler, but the linker does |
| 1407 | not yet know how to create global offset tables. */ |
| 1408 | |
| 1409 | static bfd_reloc_status_type |
| 1410 | mips_elf_got16_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1411 | output_bfd, error_message) |
| 1412 | bfd *abfd; |
| 1413 | arelent *reloc_entry; |
| 1414 | asymbol *symbol; |
| 1415 | PTR data; |
| 1416 | asection *input_section; |
| 1417 | bfd *output_bfd; |
| 1418 | char **error_message; |
| 1419 | { |
| 1420 | /* If we're relocating, and this is a local symbol, we can handle it |
| 1421 | just like HI16. */ |
| 1422 | if (output_bfd != (bfd *) NULL |
| 1423 | && (symbol->flags & BSF_SECTION_SYM) != 0) |
| 1424 | return mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, |
| 1425 | input_section, output_bfd, error_message); |
| 1426 | |
| 1427 | /* Otherwise we try to handle it as R_MIPS_GOT_DISP. */ |
| 1428 | return mips_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1429 | input_section, output_bfd, error_message); |
| 1430 | } |
| 1431 | |
| 1432 | /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a |
| 1433 | dangerous relocation. */ |
| 1434 | |
| 1435 | static bfd_boolean |
| 1436 | mips_elf_assign_gp (output_bfd, pgp) |
| 1437 | bfd *output_bfd; |
| 1438 | bfd_vma *pgp; |
| 1439 | { |
| 1440 | unsigned int count; |
| 1441 | asymbol **sym; |
| 1442 | unsigned int i; |
| 1443 | |
| 1444 | /* If we've already figured out what GP will be, just return it. */ |
| 1445 | *pgp = _bfd_get_gp_value (output_bfd); |
| 1446 | if (*pgp) |
| 1447 | return TRUE; |
| 1448 | |
| 1449 | count = bfd_get_symcount (output_bfd); |
| 1450 | sym = bfd_get_outsymbols (output_bfd); |
| 1451 | |
| 1452 | /* The linker script will have created a symbol named `_gp' with the |
| 1453 | appropriate value. */ |
| 1454 | if (sym == (asymbol **) NULL) |
| 1455 | i = count; |
| 1456 | else |
| 1457 | { |
| 1458 | for (i = 0; i < count; i++, sym++) |
| 1459 | { |
| 1460 | register const char *name; |
| 1461 | |
| 1462 | name = bfd_asymbol_name (*sym); |
| 1463 | if (*name == '_' && strcmp (name, "_gp") == 0) |
| 1464 | { |
| 1465 | *pgp = bfd_asymbol_value (*sym); |
| 1466 | _bfd_set_gp_value (output_bfd, *pgp); |
| 1467 | break; |
| 1468 | } |
| 1469 | } |
| 1470 | } |
| 1471 | |
| 1472 | if (i >= count) |
| 1473 | { |
| 1474 | /* Only get the error once. */ |
| 1475 | *pgp = 4; |
| 1476 | _bfd_set_gp_value (output_bfd, *pgp); |
| 1477 | return FALSE; |
| 1478 | } |
| 1479 | |
| 1480 | return TRUE; |
| 1481 | } |
| 1482 | |
| 1483 | /* We have to figure out the gp value, so that we can adjust the |
| 1484 | symbol value correctly. We look up the symbol _gp in the output |
| 1485 | BFD. If we can't find it, we're stuck. We cache it in the ELF |
| 1486 | target data. We don't need to adjust the symbol value for an |
| 1487 | external symbol if we are producing relocateable output. */ |
| 1488 | |
| 1489 | static bfd_reloc_status_type |
| 1490 | mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, pgp) |
| 1491 | bfd *output_bfd; |
| 1492 | asymbol *symbol; |
| 1493 | bfd_boolean relocateable; |
| 1494 | char **error_message; |
| 1495 | bfd_vma *pgp; |
| 1496 | { |
| 1497 | if (bfd_is_und_section (symbol->section) |
| 1498 | && ! relocateable) |
| 1499 | { |
| 1500 | *pgp = 0; |
| 1501 | return bfd_reloc_undefined; |
| 1502 | } |
| 1503 | |
| 1504 | *pgp = _bfd_get_gp_value (output_bfd); |
| 1505 | if (*pgp == 0 |
| 1506 | && (! relocateable |
| 1507 | || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| 1508 | { |
| 1509 | if (relocateable) |
| 1510 | { |
| 1511 | /* Make up a value. */ |
| 1512 | *pgp = symbol->section->output_section->vma /*+ 0x4000*/; |
| 1513 | _bfd_set_gp_value (output_bfd, *pgp); |
| 1514 | } |
| 1515 | else if (!mips_elf_assign_gp (output_bfd, pgp)) |
| 1516 | { |
| 1517 | *error_message = |
| 1518 | (char *) _("GP relative relocation when _gp not defined"); |
| 1519 | return bfd_reloc_dangerous; |
| 1520 | } |
| 1521 | } |
| 1522 | |
| 1523 | return bfd_reloc_ok; |
| 1524 | } |
| 1525 | |
| 1526 | /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must |
| 1527 | become the offset from the gp register. */ |
| 1528 | |
| 1529 | static bfd_reloc_status_type |
| 1530 | mips_elf_gprel16_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1531 | output_bfd, error_message) |
| 1532 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1533 | arelent *reloc_entry; |
| 1534 | asymbol *symbol; |
| 1535 | PTR data ATTRIBUTE_UNUSED; |
| 1536 | asection *input_section; |
| 1537 | bfd *output_bfd; |
| 1538 | char **error_message ATTRIBUTE_UNUSED; |
| 1539 | { |
| 1540 | bfd_boolean relocateable; |
| 1541 | bfd_reloc_status_type ret; |
| 1542 | bfd_vma gp; |
| 1543 | |
| 1544 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) |
| 1545 | |
| 1546 | if (output_bfd != (bfd *) NULL) |
| 1547 | relocateable = TRUE; |
| 1548 | else |
| 1549 | { |
| 1550 | relocateable = FALSE; |
| 1551 | output_bfd = symbol->section->output_section->owner; |
| 1552 | } |
| 1553 | |
| 1554 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, |
| 1555 | &gp); |
| 1556 | if (ret != bfd_reloc_ok) |
| 1557 | return ret; |
| 1558 | |
| 1559 | return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, |
| 1560 | input_section, relocateable, |
| 1561 | data, gp); |
| 1562 | } |
| 1563 | |
| 1564 | /* Do a R_MIPS_LITERAL relocation. */ |
| 1565 | |
| 1566 | static bfd_reloc_status_type |
| 1567 | mips_elf_literal_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1568 | output_bfd, error_message) |
| 1569 | bfd *abfd; |
| 1570 | arelent *reloc_entry; |
| 1571 | asymbol *symbol; |
| 1572 | PTR data; |
| 1573 | asection *input_section; |
| 1574 | bfd *output_bfd; |
| 1575 | char **error_message; |
| 1576 | { |
| 1577 | bfd_boolean relocateable; |
| 1578 | bfd_reloc_status_type ret; |
| 1579 | bfd_vma gp; |
| 1580 | |
| 1581 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) |
| 1582 | |
| 1583 | /* FIXME: The entries in the .lit8 and .lit4 sections should be merged. */ |
| 1584 | if (output_bfd != (bfd *) NULL) |
| 1585 | relocateable = TRUE; |
| 1586 | else |
| 1587 | { |
| 1588 | relocateable = FALSE; |
| 1589 | output_bfd = symbol->section->output_section->owner; |
| 1590 | } |
| 1591 | |
| 1592 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, |
| 1593 | &gp); |
| 1594 | if (ret != bfd_reloc_ok) |
| 1595 | return ret; |
| 1596 | |
| 1597 | return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, |
| 1598 | input_section, relocateable, |
| 1599 | data, gp); |
| 1600 | } |
| 1601 | |
| 1602 | /* Do a R_MIPS_GPREL32 relocation. This is a 32 bit value which must |
| 1603 | become the offset from the gp register. */ |
| 1604 | |
| 1605 | static bfd_reloc_status_type |
| 1606 | mips_elf_gprel32_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1607 | output_bfd, error_message) |
| 1608 | bfd *abfd; |
| 1609 | arelent *reloc_entry; |
| 1610 | asymbol *symbol; |
| 1611 | PTR data; |
| 1612 | asection *input_section; |
| 1613 | bfd *output_bfd; |
| 1614 | char **error_message; |
| 1615 | { |
| 1616 | bfd_boolean relocateable; |
| 1617 | bfd_reloc_status_type ret; |
| 1618 | bfd_vma gp; |
| 1619 | |
| 1620 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) |
| 1621 | |
| 1622 | /* R_MIPS_GPREL32 relocations are defined for local symbols only. |
| 1623 | We will only have an addend if this is a newly created reloc, |
| 1624 | not read from an ELF file. */ |
| 1625 | if (output_bfd != (bfd *) NULL |
| 1626 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 1627 | && reloc_entry->addend == 0) |
| 1628 | { |
| 1629 | *error_message = (char *) |
| 1630 | _("32bits gp relative relocation occurs for an external symbol"); |
| 1631 | return bfd_reloc_outofrange; |
| 1632 | } |
| 1633 | |
| 1634 | if (output_bfd != (bfd *) NULL) |
| 1635 | { |
| 1636 | relocateable = TRUE; |
| 1637 | gp = _bfd_get_gp_value (output_bfd); |
| 1638 | } |
| 1639 | else |
| 1640 | { |
| 1641 | relocateable = FALSE; |
| 1642 | output_bfd = symbol->section->output_section->owner; |
| 1643 | |
| 1644 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, |
| 1645 | error_message, &gp); |
| 1646 | if (ret != bfd_reloc_ok) |
| 1647 | return ret; |
| 1648 | } |
| 1649 | |
| 1650 | return gprel32_with_gp (abfd, symbol, reloc_entry, input_section, |
| 1651 | relocateable, data, gp); |
| 1652 | } |
| 1653 | |
| 1654 | static bfd_reloc_status_type |
| 1655 | gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, |
| 1656 | gp) |
| 1657 | bfd *abfd; |
| 1658 | asymbol *symbol; |
| 1659 | arelent *reloc_entry; |
| 1660 | asection *input_section; |
| 1661 | bfd_boolean relocateable; |
| 1662 | PTR data; |
| 1663 | bfd_vma gp; |
| 1664 | { |
| 1665 | bfd_vma relocation; |
| 1666 | unsigned long val; |
| 1667 | |
| 1668 | if (bfd_is_com_section (symbol->section)) |
| 1669 | relocation = 0; |
| 1670 | else |
| 1671 | relocation = symbol->value; |
| 1672 | |
| 1673 | relocation += symbol->section->output_section->vma; |
| 1674 | relocation += symbol->section->output_offset; |
| 1675 | |
| 1676 | if (reloc_entry->address > input_section->_cooked_size) |
| 1677 | return bfd_reloc_outofrange; |
| 1678 | |
| 1679 | if (reloc_entry->howto->src_mask == 0) |
| 1680 | val = 0; |
| 1681 | else |
| 1682 | val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1683 | |
| 1684 | /* Set val to the offset into the section or symbol. */ |
| 1685 | val += reloc_entry->addend; |
| 1686 | |
| 1687 | /* Adjust val for the final section location and GP value. If we |
| 1688 | are producing relocateable output, we don't want to do this for |
| 1689 | an external symbol. */ |
| 1690 | if (! relocateable |
| 1691 | || (symbol->flags & BSF_SECTION_SYM) != 0) |
| 1692 | val += relocation - gp; |
| 1693 | |
| 1694 | bfd_put_32 (abfd, (bfd_vma) val, (bfd_byte *) data + reloc_entry->address); |
| 1695 | |
| 1696 | if (relocateable) |
| 1697 | reloc_entry->address += input_section->output_offset; |
| 1698 | |
| 1699 | return bfd_reloc_ok; |
| 1700 | } |
| 1701 | |
| 1702 | /* Do a R_MIPS_SHIFT6 relocation. The MSB of the shift is stored at bit 2, |
| 1703 | the rest is at bits 6-10. The bitpos already got right by the howto. */ |
| 1704 | |
| 1705 | static bfd_reloc_status_type |
| 1706 | mips_elf_shift6_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1707 | output_bfd, error_message) |
| 1708 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1709 | arelent *reloc_entry; |
| 1710 | asymbol *symbol; |
| 1711 | PTR data ATTRIBUTE_UNUSED; |
| 1712 | asection *input_section; |
| 1713 | bfd *output_bfd; |
| 1714 | char **error_message ATTRIBUTE_UNUSED; |
| 1715 | { |
| 1716 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) |
| 1717 | |
| 1718 | reloc_entry->addend = (reloc_entry->addend & 0x00007c0) |
| 1719 | | (reloc_entry->addend & 0x00000800) >> 9; |
| 1720 | |
| 1721 | SET_RELOC_ADDEND (reloc_entry) |
| 1722 | |
| 1723 | return bfd_reloc_continue; |
| 1724 | } |
| 1725 | \f |
| 1726 | /* Handle a mips16 jump. */ |
| 1727 | |
| 1728 | static bfd_reloc_status_type |
| 1729 | mips16_jump_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1730 | output_bfd, error_message) |
| 1731 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1732 | arelent *reloc_entry; |
| 1733 | asymbol *symbol; |
| 1734 | PTR data ATTRIBUTE_UNUSED; |
| 1735 | asection *input_section; |
| 1736 | bfd *output_bfd; |
| 1737 | char **error_message ATTRIBUTE_UNUSED; |
| 1738 | { |
| 1739 | static bfd_boolean warned = FALSE; |
| 1740 | |
| 1741 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) |
| 1742 | |
| 1743 | /* FIXME. */ |
| 1744 | if (! warned) |
| 1745 | (*_bfd_error_handler) |
| 1746 | (_("Linking mips16 objects into %s format is not supported"), |
| 1747 | bfd_get_target (input_section->output_section->owner)); |
| 1748 | warned = TRUE; |
| 1749 | |
| 1750 | return bfd_reloc_undefined; |
| 1751 | } |
| 1752 | |
| 1753 | /* Handle a mips16 GP relative reloc. */ |
| 1754 | |
| 1755 | static bfd_reloc_status_type |
| 1756 | mips16_gprel_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1757 | output_bfd, error_message) |
| 1758 | bfd *abfd; |
| 1759 | arelent *reloc_entry; |
| 1760 | asymbol *symbol; |
| 1761 | PTR data; |
| 1762 | asection *input_section; |
| 1763 | bfd *output_bfd; |
| 1764 | char **error_message; |
| 1765 | { |
| 1766 | bfd_boolean relocateable; |
| 1767 | bfd_reloc_status_type ret; |
| 1768 | bfd_vma gp; |
| 1769 | unsigned short extend, insn; |
| 1770 | unsigned long final; |
| 1771 | |
| 1772 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) |
| 1773 | |
| 1774 | if (output_bfd != NULL) |
| 1775 | relocateable = TRUE; |
| 1776 | else |
| 1777 | { |
| 1778 | relocateable = FALSE; |
| 1779 | output_bfd = symbol->section->output_section->owner; |
| 1780 | } |
| 1781 | |
| 1782 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, |
| 1783 | &gp); |
| 1784 | if (ret != bfd_reloc_ok) |
| 1785 | return ret; |
| 1786 | |
| 1787 | if (reloc_entry->address > input_section->_cooked_size) |
| 1788 | return bfd_reloc_outofrange; |
| 1789 | |
| 1790 | /* Pick up the mips16 extend instruction and the real instruction. */ |
| 1791 | extend = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1792 | insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address + 2); |
| 1793 | |
| 1794 | /* Stuff the current addend back as a 32 bit value, do the usual |
| 1795 | relocation, and then clean up. */ |
| 1796 | bfd_put_32 (abfd, |
| 1797 | (bfd_vma) (((extend & 0x1f) << 11) |
| 1798 | | (extend & 0x7e0) |
| 1799 | | (insn & 0x1f)), |
| 1800 | (bfd_byte *) data + reloc_entry->address); |
| 1801 | |
| 1802 | ret = _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, |
| 1803 | input_section, relocateable, data, gp); |
| 1804 | |
| 1805 | final = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1806 | bfd_put_16 (abfd, |
| 1807 | (bfd_vma) ((extend & 0xf800) |
| 1808 | | ((final >> 11) & 0x1f) |
| 1809 | | (final & 0x7e0)), |
| 1810 | (bfd_byte *) data + reloc_entry->address); |
| 1811 | bfd_put_16 (abfd, |
| 1812 | (bfd_vma) ((insn & 0xffe0) |
| 1813 | | (final & 0x1f)), |
| 1814 | (bfd_byte *) data + reloc_entry->address + 2); |
| 1815 | |
| 1816 | return ret; |
| 1817 | } |
| 1818 | |
| 1819 | #undef GET_RELOC_ADDEND |
| 1820 | #undef SET_RELOC_ADDEND |
| 1821 | \f |
| 1822 | /* A mapping from BFD reloc types to MIPS ELF reloc types. */ |
| 1823 | |
| 1824 | struct elf_reloc_map { |
| 1825 | bfd_reloc_code_real_type bfd_val; |
| 1826 | enum elf_mips_reloc_type elf_val; |
| 1827 | }; |
| 1828 | |
| 1829 | static const struct elf_reloc_map mips_reloc_map[] = |
| 1830 | { |
| 1831 | { BFD_RELOC_NONE, R_MIPS_NONE }, |
| 1832 | { BFD_RELOC_16, R_MIPS_16 }, |
| 1833 | { BFD_RELOC_32, R_MIPS_32 }, |
| 1834 | /* There is no BFD reloc for R_MIPS_REL32. */ |
| 1835 | { BFD_RELOC_CTOR, R_MIPS_32 }, |
| 1836 | { BFD_RELOC_64, R_MIPS_64 }, |
| 1837 | { BFD_RELOC_16_PCREL, R_MIPS_PC16 }, |
| 1838 | { BFD_RELOC_HI16_S, R_MIPS_HI16 }, |
| 1839 | { BFD_RELOC_LO16, R_MIPS_LO16 }, |
| 1840 | { BFD_RELOC_GPREL16, R_MIPS_GPREL16 }, |
| 1841 | { BFD_RELOC_GPREL32, R_MIPS_GPREL32 }, |
| 1842 | { BFD_RELOC_MIPS_JMP, R_MIPS_26 }, |
| 1843 | { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL }, |
| 1844 | { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 }, |
| 1845 | { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 }, |
| 1846 | { BFD_RELOC_MIPS_SHIFT5, R_MIPS_SHIFT5 }, |
| 1847 | { BFD_RELOC_MIPS_SHIFT6, R_MIPS_SHIFT6 }, |
| 1848 | { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP }, |
| 1849 | { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE }, |
| 1850 | { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST }, |
| 1851 | { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 }, |
| 1852 | { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 }, |
| 1853 | { BFD_RELOC_MIPS_SUB, R_MIPS_SUB }, |
| 1854 | { BFD_RELOC_MIPS_INSERT_A, R_MIPS_INSERT_A }, |
| 1855 | { BFD_RELOC_MIPS_INSERT_B, R_MIPS_INSERT_B }, |
| 1856 | { BFD_RELOC_MIPS_DELETE, R_MIPS_DELETE }, |
| 1857 | { BFD_RELOC_MIPS_HIGHEST, R_MIPS_HIGHEST }, |
| 1858 | { BFD_RELOC_MIPS_HIGHER, R_MIPS_HIGHER }, |
| 1859 | { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 }, |
| 1860 | { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 }, |
| 1861 | { BFD_RELOC_MIPS_SCN_DISP, R_MIPS_SCN_DISP }, |
| 1862 | { BFD_RELOC_MIPS_REL16, R_MIPS_REL16 }, |
| 1863 | /* Use of R_MIPS_ADD_IMMEDIATE and R_MIPS_PJUMP is deprecated. */ |
| 1864 | { BFD_RELOC_MIPS_RELGOT, R_MIPS_RELGOT }, |
| 1865 | { BFD_RELOC_MIPS_JALR, R_MIPS_JALR } |
| 1866 | }; |
| 1867 | |
| 1868 | /* Given a BFD reloc type, return a howto structure. */ |
| 1869 | |
| 1870 | static reloc_howto_type * |
| 1871 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) |
| 1872 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1873 | bfd_reloc_code_real_type code; |
| 1874 | { |
| 1875 | unsigned int i; |
| 1876 | /* FIXME: We default to RELA here instead of choosing the right |
| 1877 | relocation variant. */ |
| 1878 | reloc_howto_type *howto_table = elf_mips_howto_table_rela; |
| 1879 | |
| 1880 | for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); |
| 1881 | i++) |
| 1882 | { |
| 1883 | if (mips_reloc_map[i].bfd_val == code) |
| 1884 | return &howto_table[(int) mips_reloc_map[i].elf_val]; |
| 1885 | } |
| 1886 | |
| 1887 | switch (code) |
| 1888 | { |
| 1889 | case BFD_RELOC_MIPS16_JMP: |
| 1890 | return &elf_mips16_jump_howto; |
| 1891 | case BFD_RELOC_MIPS16_GPREL: |
| 1892 | return &elf_mips16_gprel_howto; |
| 1893 | case BFD_RELOC_VTABLE_INHERIT: |
| 1894 | return &elf_mips_gnu_vtinherit_howto; |
| 1895 | case BFD_RELOC_VTABLE_ENTRY: |
| 1896 | return &elf_mips_gnu_vtentry_howto; |
| 1897 | default: |
| 1898 | bfd_set_error (bfd_error_bad_value); |
| 1899 | return NULL; |
| 1900 | } |
| 1901 | } |
| 1902 | |
| 1903 | /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */ |
| 1904 | |
| 1905 | static reloc_howto_type * |
| 1906 | mips_elf_n32_rtype_to_howto (r_type, rela_p) |
| 1907 | unsigned int r_type; |
| 1908 | bfd_boolean rela_p; |
| 1909 | { |
| 1910 | switch (r_type) |
| 1911 | { |
| 1912 | case R_MIPS16_26: |
| 1913 | return &elf_mips16_jump_howto; |
| 1914 | case R_MIPS16_GPREL: |
| 1915 | return &elf_mips16_gprel_howto; |
| 1916 | case R_MIPS_GNU_VTINHERIT: |
| 1917 | return &elf_mips_gnu_vtinherit_howto; |
| 1918 | case R_MIPS_GNU_VTENTRY: |
| 1919 | return &elf_mips_gnu_vtentry_howto; |
| 1920 | default: |
| 1921 | BFD_ASSERT (r_type < (unsigned int) R_MIPS_max); |
| 1922 | if (rela_p) |
| 1923 | return &elf_mips_howto_table_rela[r_type]; |
| 1924 | else |
| 1925 | return &elf_mips_howto_table_rel[r_type]; |
| 1926 | break; |
| 1927 | } |
| 1928 | } |
| 1929 | |
| 1930 | /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */ |
| 1931 | |
| 1932 | static void |
| 1933 | mips_info_to_howto_rel (abfd, cache_ptr, dst) |
| 1934 | bfd *abfd; |
| 1935 | arelent *cache_ptr; |
| 1936 | Elf_Internal_Rela *dst; |
| 1937 | { |
| 1938 | unsigned int r_type; |
| 1939 | |
| 1940 | r_type = ELF32_R_TYPE (dst->r_info); |
| 1941 | cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, FALSE); |
| 1942 | |
| 1943 | /* The addend for a GPREL16 or LITERAL relocation comes from the GP |
| 1944 | value for the object file. We get the addend now, rather than |
| 1945 | when we do the relocation, because the symbol manipulations done |
| 1946 | by the linker may cause us to lose track of the input BFD. */ |
| 1947 | if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0 |
| 1948 | && (r_type == (unsigned int) R_MIPS_GPREL16 |
| 1949 | || r_type == (unsigned int) R_MIPS_LITERAL)) |
| 1950 | cache_ptr->addend = elf_gp (abfd); |
| 1951 | } |
| 1952 | |
| 1953 | /* Given a MIPS Elf_Internal_Rela, fill in an arelent structure. */ |
| 1954 | |
| 1955 | static void |
| 1956 | mips_info_to_howto_rela (abfd, cache_ptr, dst) |
| 1957 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1958 | arelent *cache_ptr; |
| 1959 | Elf_Internal_Rela *dst; |
| 1960 | { |
| 1961 | unsigned int r_type; |
| 1962 | |
| 1963 | r_type = ELF32_R_TYPE (dst->r_info); |
| 1964 | cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, TRUE); |
| 1965 | cache_ptr->addend = dst->r_addend; |
| 1966 | } |
| 1967 | \f |
| 1968 | /* Determine whether a symbol is global for the purposes of splitting |
| 1969 | the symbol table into global symbols and local symbols. At least |
| 1970 | on Irix 5, this split must be between section symbols and all other |
| 1971 | symbols. On most ELF targets the split is between static symbols |
| 1972 | and externally visible symbols. */ |
| 1973 | |
| 1974 | static bfd_boolean |
| 1975 | mips_elf_sym_is_global (abfd, sym) |
| 1976 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1977 | asymbol *sym; |
| 1978 | { |
| 1979 | if (SGI_COMPAT (abfd)) |
| 1980 | return (sym->flags & BSF_SECTION_SYM) == 0; |
| 1981 | else |
| 1982 | return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 |
| 1983 | || bfd_is_und_section (bfd_get_section (sym)) |
| 1984 | || bfd_is_com_section (bfd_get_section (sym))); |
| 1985 | } |
| 1986 | \f |
| 1987 | /* Set the right machine number for a MIPS ELF file. */ |
| 1988 | |
| 1989 | static bfd_boolean |
| 1990 | mips_elf_n32_object_p (abfd) |
| 1991 | bfd *abfd; |
| 1992 | { |
| 1993 | unsigned long mach; |
| 1994 | |
| 1995 | /* Irix 5 and 6 are broken. Object file symbol tables are not always |
| 1996 | sorted correctly such that local symbols precede global symbols, |
| 1997 | and the sh_info field in the symbol table is not always right. */ |
| 1998 | if (SGI_COMPAT (abfd)) |
| 1999 | elf_bad_symtab (abfd) = TRUE; |
| 2000 | |
| 2001 | mach = _bfd_elf_mips_mach (elf_elfheader (abfd)->e_flags); |
| 2002 | bfd_default_set_arch_mach (abfd, bfd_arch_mips, mach); |
| 2003 | |
| 2004 | if (! ABI_N32_P(abfd)) |
| 2005 | return FALSE; |
| 2006 | |
| 2007 | return TRUE; |
| 2008 | } |
| 2009 | \f |
| 2010 | /* Support for core dump NOTE sections. */ |
| 2011 | static bfd_boolean |
| 2012 | elf32_mips_grok_prstatus (abfd, note) |
| 2013 | bfd *abfd; |
| 2014 | Elf_Internal_Note *note; |
| 2015 | { |
| 2016 | int offset; |
| 2017 | unsigned int raw_size; |
| 2018 | |
| 2019 | switch (note->descsz) |
| 2020 | { |
| 2021 | default: |
| 2022 | return FALSE; |
| 2023 | |
| 2024 | case 256: /* Linux/MIPS */ |
| 2025 | /* pr_cursig */ |
| 2026 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); |
| 2027 | |
| 2028 | /* pr_pid */ |
| 2029 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); |
| 2030 | |
| 2031 | /* pr_reg */ |
| 2032 | offset = 72; |
| 2033 | raw_size = 180; |
| 2034 | |
| 2035 | break; |
| 2036 | } |
| 2037 | |
| 2038 | /* Make a ".reg/999" section. */ |
| 2039 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", raw_size, |
| 2040 | note->descpos + offset); |
| 2041 | } |
| 2042 | |
| 2043 | static bfd_boolean |
| 2044 | elf32_mips_grok_psinfo (abfd, note) |
| 2045 | bfd *abfd; |
| 2046 | Elf_Internal_Note *note; |
| 2047 | { |
| 2048 | switch (note->descsz) |
| 2049 | { |
| 2050 | default: |
| 2051 | return FALSE; |
| 2052 | |
| 2053 | case 128: /* Linux/MIPS elf_prpsinfo */ |
| 2054 | elf_tdata (abfd)->core_program |
| 2055 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); |
| 2056 | elf_tdata (abfd)->core_command |
| 2057 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); |
| 2058 | } |
| 2059 | |
| 2060 | /* Note that for some reason, a spurious space is tacked |
| 2061 | onto the end of the args in some (at least one anyway) |
| 2062 | implementations, so strip it off if it exists. */ |
| 2063 | |
| 2064 | { |
| 2065 | char *command = elf_tdata (abfd)->core_command; |
| 2066 | int n = strlen (command); |
| 2067 | |
| 2068 | if (0 < n && command[n - 1] == ' ') |
| 2069 | command[n - 1] = '\0'; |
| 2070 | } |
| 2071 | |
| 2072 | return TRUE; |
| 2073 | } |
| 2074 | \f |
| 2075 | /* Depending on the target vector we generate some version of Irix |
| 2076 | executables or "normal" MIPS ELF ABI executables. */ |
| 2077 | static irix_compat_t |
| 2078 | elf_n32_mips_irix_compat (abfd) |
| 2079 | bfd *abfd; |
| 2080 | { |
| 2081 | if ((abfd->xvec == &bfd_elf32_nbigmips_vec) |
| 2082 | || (abfd->xvec == &bfd_elf32_nlittlemips_vec)) |
| 2083 | return ict_irix6; |
| 2084 | else |
| 2085 | return ict_none; |
| 2086 | } |
| 2087 | \f |
| 2088 | /* ECOFF swapping routines. These are used when dealing with the |
| 2089 | .mdebug section, which is in the ECOFF debugging format. */ |
| 2090 | static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = { |
| 2091 | /* Symbol table magic number. */ |
| 2092 | magicSym, |
| 2093 | /* Alignment of debugging information. E.g., 4. */ |
| 2094 | 4, |
| 2095 | /* Sizes of external symbolic information. */ |
| 2096 | sizeof (struct hdr_ext), |
| 2097 | sizeof (struct dnr_ext), |
| 2098 | sizeof (struct pdr_ext), |
| 2099 | sizeof (struct sym_ext), |
| 2100 | sizeof (struct opt_ext), |
| 2101 | sizeof (struct fdr_ext), |
| 2102 | sizeof (struct rfd_ext), |
| 2103 | sizeof (struct ext_ext), |
| 2104 | /* Functions to swap in external symbolic data. */ |
| 2105 | ecoff_swap_hdr_in, |
| 2106 | ecoff_swap_dnr_in, |
| 2107 | ecoff_swap_pdr_in, |
| 2108 | ecoff_swap_sym_in, |
| 2109 | ecoff_swap_opt_in, |
| 2110 | ecoff_swap_fdr_in, |
| 2111 | ecoff_swap_rfd_in, |
| 2112 | ecoff_swap_ext_in, |
| 2113 | _bfd_ecoff_swap_tir_in, |
| 2114 | _bfd_ecoff_swap_rndx_in, |
| 2115 | /* Functions to swap out external symbolic data. */ |
| 2116 | ecoff_swap_hdr_out, |
| 2117 | ecoff_swap_dnr_out, |
| 2118 | ecoff_swap_pdr_out, |
| 2119 | ecoff_swap_sym_out, |
| 2120 | ecoff_swap_opt_out, |
| 2121 | ecoff_swap_fdr_out, |
| 2122 | ecoff_swap_rfd_out, |
| 2123 | ecoff_swap_ext_out, |
| 2124 | _bfd_ecoff_swap_tir_out, |
| 2125 | _bfd_ecoff_swap_rndx_out, |
| 2126 | /* Function to read in symbolic data. */ |
| 2127 | _bfd_mips_elf_read_ecoff_info |
| 2128 | }; |
| 2129 | \f |
| 2130 | #define ELF_ARCH bfd_arch_mips |
| 2131 | #define ELF_MACHINE_CODE EM_MIPS |
| 2132 | |
| 2133 | /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses |
| 2134 | a value of 0x1000, and we are compatible. |
| 2135 | FIXME: How does this affect NewABI? */ |
| 2136 | #define ELF_MAXPAGESIZE 0x1000 |
| 2137 | |
| 2138 | #define elf_backend_collect TRUE |
| 2139 | #define elf_backend_type_change_ok TRUE |
| 2140 | #define elf_backend_can_gc_sections TRUE |
| 2141 | #define elf_info_to_howto mips_info_to_howto_rela |
| 2142 | #define elf_info_to_howto_rel mips_info_to_howto_rel |
| 2143 | #define elf_backend_sym_is_global mips_elf_sym_is_global |
| 2144 | #define elf_backend_object_p mips_elf_n32_object_p |
| 2145 | #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing |
| 2146 | #define elf_backend_section_processing _bfd_mips_elf_section_processing |
| 2147 | #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr |
| 2148 | #define elf_backend_fake_sections _bfd_mips_elf_fake_sections |
| 2149 | #define elf_backend_section_from_bfd_section \ |
| 2150 | _bfd_mips_elf_section_from_bfd_section |
| 2151 | #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook |
| 2152 | #define elf_backend_link_output_symbol_hook \ |
| 2153 | _bfd_mips_elf_link_output_symbol_hook |
| 2154 | #define elf_backend_create_dynamic_sections \ |
| 2155 | _bfd_mips_elf_create_dynamic_sections |
| 2156 | #define elf_backend_check_relocs _bfd_mips_elf_check_relocs |
| 2157 | #define elf_backend_adjust_dynamic_symbol \ |
| 2158 | _bfd_mips_elf_adjust_dynamic_symbol |
| 2159 | #define elf_backend_always_size_sections \ |
| 2160 | _bfd_mips_elf_always_size_sections |
| 2161 | #define elf_backend_size_dynamic_sections \ |
| 2162 | _bfd_mips_elf_size_dynamic_sections |
| 2163 | #define elf_backend_relocate_section _bfd_mips_elf_relocate_section |
| 2164 | #define elf_backend_finish_dynamic_symbol \ |
| 2165 | _bfd_mips_elf_finish_dynamic_symbol |
| 2166 | #define elf_backend_finish_dynamic_sections \ |
| 2167 | _bfd_mips_elf_finish_dynamic_sections |
| 2168 | #define elf_backend_final_write_processing \ |
| 2169 | _bfd_mips_elf_final_write_processing |
| 2170 | #define elf_backend_additional_program_headers \ |
| 2171 | _bfd_mips_elf_additional_program_headers |
| 2172 | #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map |
| 2173 | #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook |
| 2174 | #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook |
| 2175 | #define elf_backend_copy_indirect_symbol \ |
| 2176 | _bfd_mips_elf_copy_indirect_symbol |
| 2177 | #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol |
| 2178 | #define elf_backend_grok_prstatus elf32_mips_grok_prstatus |
| 2179 | #define elf_backend_grok_psinfo elf32_mips_grok_psinfo |
| 2180 | #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap |
| 2181 | |
| 2182 | #define elf_backend_got_header_size (4 * MIPS_RESERVED_GOTNO) |
| 2183 | #define elf_backend_plt_header_size 0 |
| 2184 | |
| 2185 | /* MIPS n32 ELF can use a mixture of REL and RELA, but some Relocations |
| 2186 | work better/work only in RELA, so we default to this. */ |
| 2187 | #define elf_backend_may_use_rel_p 1 |
| 2188 | #define elf_backend_may_use_rela_p 1 |
| 2189 | #define elf_backend_default_use_rela_p 1 |
| 2190 | #define elf_backend_sign_extend_vma TRUE |
| 2191 | |
| 2192 | #define elf_backend_discard_info _bfd_mips_elf_discard_info |
| 2193 | #define elf_backend_ignore_discarded_relocs \ |
| 2194 | _bfd_mips_elf_ignore_discarded_relocs |
| 2195 | #define elf_backend_write_section _bfd_mips_elf_write_section |
| 2196 | #define elf_backend_mips_irix_compat elf_n32_mips_irix_compat |
| 2197 | #define elf_backend_mips_rtype_to_howto mips_elf_n32_rtype_to_howto |
| 2198 | #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line |
| 2199 | #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents |
| 2200 | #define bfd_elf32_bfd_get_relocated_section_contents \ |
| 2201 | _bfd_elf_mips_get_relocated_section_contents |
| 2202 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 2203 | _bfd_mips_elf_link_hash_table_create |
| 2204 | #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link |
| 2205 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 2206 | _bfd_mips_elf_merge_private_bfd_data |
| 2207 | #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags |
| 2208 | #define bfd_elf32_bfd_print_private_bfd_data \ |
| 2209 | _bfd_mips_elf_print_private_bfd_data |
| 2210 | |
| 2211 | /* Support for SGI-ish mips targets using n32 ABI. */ |
| 2212 | |
| 2213 | #define TARGET_LITTLE_SYM bfd_elf32_nlittlemips_vec |
| 2214 | #define TARGET_LITTLE_NAME "elf32-nlittlemips" |
| 2215 | #define TARGET_BIG_SYM bfd_elf32_nbigmips_vec |
| 2216 | #define TARGET_BIG_NAME "elf32-nbigmips" |
| 2217 | |
| 2218 | #include "elf32-target.h" |
| 2219 | |
| 2220 | /* Support for traditional mips targets using n32 ABI. */ |
| 2221 | #define INCLUDED_TARGET_FILE /* More a type of flag. */ |
| 2222 | |
| 2223 | #undef TARGET_LITTLE_SYM |
| 2224 | #undef TARGET_LITTLE_NAME |
| 2225 | #undef TARGET_BIG_SYM |
| 2226 | #undef TARGET_BIG_NAME |
| 2227 | |
| 2228 | #define TARGET_LITTLE_SYM bfd_elf32_ntradlittlemips_vec |
| 2229 | #define TARGET_LITTLE_NAME "elf32-ntradlittlemips" |
| 2230 | #define TARGET_BIG_SYM bfd_elf32_ntradbigmips_vec |
| 2231 | #define TARGET_BIG_NAME "elf32-ntradbigmips" |
| 2232 | |
| 2233 | /* Include the target file again for this target. */ |
| 2234 | #include "elf32-target.h" |