1 /* MIPS ELF support for BFD. 2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 3 2003, 2004, 2005, 2008, 2009, 2010 4 Free Software Foundation, Inc. 5 6 By Ian Lance Taylor, Cygnus Support, <ian@cygnus.com>, from 7 information in the System V Application Binary Interface, MIPS 8 Processor Supplement. 9 10 This file is part of BFD, the Binary File Descriptor library. 11 12 This program is free software; you can redistribute it and/or modify 13 it under the terms of the GNU General Public License as published by 14 the Free Software Foundation; either version 3 of the License, or 15 (at your option) any later version. 16 17 This program is distributed in the hope that it will be useful, 18 but WITHOUT ANY WARRANTY; without even the implied warranty of 19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 GNU General Public License for more details. 21 22 You should have received a copy of the GNU General Public License 23 along with this program; if not, write to the Free Software 24 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 25 MA 02110-1301, USA. */ 26 27 /* This file holds definitions specific to the MIPS ELF ABI. Note 28 that most of this is not actually implemented by BFD. */ 29 30 #ifndef _ELF_MIPS_H 31 #define _ELF_MIPS_H 32 33 #include "elf/reloc-macros.h" 34 35 /* Relocation types. */ 36 START_RELOC_NUMBERS (elf_mips_reloc_type) 37 RELOC_NUMBER (R_MIPS_NONE, 0) 38 RELOC_NUMBER (R_MIPS_16, 1) 39 RELOC_NUMBER (R_MIPS_32, 2) /* In Elf 64: alias R_MIPS_ADD */ 40 RELOC_NUMBER (R_MIPS_REL32, 3) /* In Elf 64: alias R_MIPS_REL */ 41 RELOC_NUMBER (R_MIPS_26, 4) 42 RELOC_NUMBER (R_MIPS_HI16, 5) 43 RELOC_NUMBER (R_MIPS_LO16, 6) 44 RELOC_NUMBER (R_MIPS_GPREL16, 7) /* In Elf 64: alias R_MIPS_GPREL */ 45 RELOC_NUMBER (R_MIPS_LITERAL, 8) 46 RELOC_NUMBER (R_MIPS_GOT16, 9) /* In Elf 64: alias R_MIPS_GOT */ 47 RELOC_NUMBER (R_MIPS_PC16, 10) 48 RELOC_NUMBER (R_MIPS_CALL16, 11) /* In Elf 64: alias R_MIPS_CALL */ 49 RELOC_NUMBER (R_MIPS_GPREL32, 12) 50 /* The remaining relocs are defined on Irix, although they are not 51 in the MIPS ELF ABI. */ 52 RELOC_NUMBER (R_MIPS_UNUSED1, 13) 53 RELOC_NUMBER (R_MIPS_UNUSED2, 14) 54 RELOC_NUMBER (R_MIPS_UNUSED3, 15) 55 RELOC_NUMBER (R_MIPS_SHIFT5, 16) 56 RELOC_NUMBER (R_MIPS_SHIFT6, 17) 57 RELOC_NUMBER (R_MIPS_64, 18) 58 RELOC_NUMBER (R_MIPS_GOT_DISP, 19) 59 RELOC_NUMBER (R_MIPS_GOT_PAGE, 20) 60 RELOC_NUMBER (R_MIPS_GOT_OFST, 21) 61 RELOC_NUMBER (R_MIPS_GOT_HI16, 22) 62 RELOC_NUMBER (R_MIPS_GOT_LO16, 23) 63 RELOC_NUMBER (R_MIPS_SUB, 24) 64 RELOC_NUMBER (R_MIPS_INSERT_A, 25) 65 RELOC_NUMBER (R_MIPS_INSERT_B, 26) 66 RELOC_NUMBER (R_MIPS_DELETE, 27) 67 RELOC_NUMBER (R_MIPS_HIGHER, 28) 68 RELOC_NUMBER (R_MIPS_HIGHEST, 29) 69 RELOC_NUMBER (R_MIPS_CALL_HI16, 30) 70 RELOC_NUMBER (R_MIPS_CALL_LO16, 31) 71 RELOC_NUMBER (R_MIPS_SCN_DISP, 32) 72 RELOC_NUMBER (R_MIPS_REL16, 33) 73 RELOC_NUMBER (R_MIPS_ADD_IMMEDIATE, 34) 74 RELOC_NUMBER (R_MIPS_PJUMP, 35) 75 RELOC_NUMBER (R_MIPS_RELGOT, 36) 76 RELOC_NUMBER (R_MIPS_JALR, 37) 77 /* TLS relocations. */ 78 RELOC_NUMBER (R_MIPS_TLS_DTPMOD32, 38) 79 RELOC_NUMBER (R_MIPS_TLS_DTPREL32, 39) 80 RELOC_NUMBER (R_MIPS_TLS_DTPMOD64, 40) 81 RELOC_NUMBER (R_MIPS_TLS_DTPREL64, 41) 82 RELOC_NUMBER (R_MIPS_TLS_GD, 42) 83 RELOC_NUMBER (R_MIPS_TLS_LDM, 43) 84 RELOC_NUMBER (R_MIPS_TLS_DTPREL_HI16, 44) 85 RELOC_NUMBER (R_MIPS_TLS_DTPREL_LO16, 45) 86 RELOC_NUMBER (R_MIPS_TLS_GOTTPREL, 46) 87 RELOC_NUMBER (R_MIPS_TLS_TPREL32, 47) 88 RELOC_NUMBER (R_MIPS_TLS_TPREL64, 48) 89 RELOC_NUMBER (R_MIPS_TLS_TPREL_HI16, 49) 90 RELOC_NUMBER (R_MIPS_TLS_TPREL_LO16, 50) 91 RELOC_NUMBER (R_MIPS_GLOB_DAT, 51) 92 FAKE_RELOC (R_MIPS_max, 52) 93 /* These relocs are used for the mips16. */ 94 FAKE_RELOC (R_MIPS16_min, 100) 95 RELOC_NUMBER (R_MIPS16_26, 100) 96 RELOC_NUMBER (R_MIPS16_GPREL, 101) 97 RELOC_NUMBER (R_MIPS16_GOT16, 102) 98 RELOC_NUMBER (R_MIPS16_CALL16, 103) 99 RELOC_NUMBER (R_MIPS16_HI16, 104) 100 RELOC_NUMBER (R_MIPS16_LO16, 105) 101 FAKE_RELOC (R_MIPS16_max, 106) 102 /* These relocations are specific to VxWorks. */ 103 RELOC_NUMBER (R_MIPS_COPY, 126) 104 RELOC_NUMBER (R_MIPS_JUMP_SLOT, 127) 105 106 /* These relocations are specific to microMIPS. */ 107 FAKE_RELOC (R_MICROMIPS_min, 130) 108 RELOC_NUMBER (R_MICROMIPS_26_S1, 133) 109 RELOC_NUMBER (R_MICROMIPS_HI16, 134) 110 RELOC_NUMBER (R_MICROMIPS_LO16, 135) 111 RELOC_NUMBER (R_MICROMIPS_GPREL16, 136) /* In Elf 64: 112 alias R_MICROMIPS_GPREL */ 113 RELOC_NUMBER (R_MICROMIPS_LITERAL, 137) 114 RELOC_NUMBER (R_MICROMIPS_GOT16, 138) /* In Elf 64: 115 alias R_MICROMIPS_GOT */ 116 RELOC_NUMBER (R_MICROMIPS_PC7_S1, 139) 117 RELOC_NUMBER (R_MICROMIPS_PC10_S1, 140) 118 RELOC_NUMBER (R_MICROMIPS_PC16_S1, 141) 119 RELOC_NUMBER (R_MICROMIPS_CALL16, 142) /* In Elf 64: 120 alias R_MICROMIPS_CALL */ 121 RELOC_NUMBER (R_MICROMIPS_GOT_DISP, 145) 122 RELOC_NUMBER (R_MICROMIPS_GOT_PAGE, 146) 123 RELOC_NUMBER (R_MICROMIPS_GOT_OFST, 147) 124 RELOC_NUMBER (R_MICROMIPS_GOT_HI16, 148) 125 RELOC_NUMBER (R_MICROMIPS_GOT_LO16, 149) 126 RELOC_NUMBER (R_MICROMIPS_SUB, 150) 127 RELOC_NUMBER (R_MICROMIPS_HIGHER, 151) 128 RELOC_NUMBER (R_MICROMIPS_HIGHEST, 152) 129 RELOC_NUMBER (R_MICROMIPS_CALL_HI16, 153) 130 RELOC_NUMBER (R_MICROMIPS_CALL_LO16, 154) 131 RELOC_NUMBER (R_MICROMIPS_SCN_DISP, 155) 132 RELOC_NUMBER (R_MICROMIPS_JALR, 156) 133 RELOC_NUMBER (R_MICROMIPS_HI0_LO16, 157) 134 /* TLS relocations. */ 135 RELOC_NUMBER (R_MICROMIPS_TLS_GD, 162) 136 RELOC_NUMBER (R_MICROMIPS_TLS_LDM, 163) 137 RELOC_NUMBER (R_MICROMIPS_TLS_DTPREL_HI16, 164) 138 RELOC_NUMBER (R_MICROMIPS_TLS_DTPREL_LO16, 165) 139 RELOC_NUMBER (R_MICROMIPS_TLS_GOTTPREL, 166) 140 RELOC_NUMBER (R_MICROMIPS_TLS_TPREL_HI16, 169) 141 RELOC_NUMBER (R_MICROMIPS_TLS_TPREL_LO16, 170) 142 /* microMIPS GP- and PC-relative relocations. */ 143 RELOC_NUMBER (R_MICROMIPS_GPREL7_S2, 172) 144 RELOC_NUMBER (R_MICROMIPS_PC23_S2, 173) 145 FAKE_RELOC (R_MICROMIPS_max, 174) 146 147 /* This was a GNU extension used by embedded-PIC. It was co-opted by 148 mips-linux for exception-handling data. It is no longer used, but 149 should continue to be supported by the linker for backward 150 compatibility. (GCC stopped using it in May, 2004.) */ 151 RELOC_NUMBER (R_MIPS_PC32, 248) 152 /* FIXME: this relocation is used internally by gas. */ 153 RELOC_NUMBER (R_MIPS_GNU_REL16_S2, 250) 154 /* These are GNU extensions to enable C++ vtable garbage collection. */ 155 RELOC_NUMBER (R_MIPS_GNU_VTINHERIT, 253) 156 RELOC_NUMBER (R_MIPS_GNU_VTENTRY, 254) 157 END_RELOC_NUMBERS (R_MIPS_maxext) 158 159 /* Processor specific flags for the ELF header e_flags field. */ 160 161 /* At least one .noreorder directive appears in the source. */ 162 #define EF_MIPS_NOREORDER 0x00000001 163 164 /* File contains position independent code. */ 165 #define EF_MIPS_PIC 0x00000002 166 167 /* Code in file uses the standard calling sequence for calling 168 position independent code. */ 169 #define EF_MIPS_CPIC 0x00000004 170 171 /* ??? Unknown flag, set in IRIX 6's BSDdup2.o in libbsd.a. */ 172 #define EF_MIPS_XGOT 0x00000008 173 174 /* Code in file uses UCODE (obsolete) */ 175 #define EF_MIPS_UCODE 0x00000010 176 177 /* Code in file uses new ABI (-n32 on Irix 6). */ 178 #define EF_MIPS_ABI2 0x00000020 179 180 /* Process the .MIPS.options section first by ld */ 181 #define EF_MIPS_OPTIONS_FIRST 0x00000080 182 183 /* Architectural Extensions used by this file */ 184 #define EF_MIPS_ARCH_ASE 0x0f000000 185 186 /* Use MDMX multimedia extensions */ 187 #define EF_MIPS_ARCH_ASE_MDMX 0x08000000 188 189 /* Use MIPS-16 ISA extensions */ 190 #define EF_MIPS_ARCH_ASE_M16 0x04000000 191 192 /* Use MICROMIPS ISA extensions. */ 193 #define EF_MIPS_ARCH_ASE_MICROMIPS 0x02000000 194 195 /* Indicates code compiled for a 64-bit machine in 32-bit mode. 196 (regs are 32-bits wide.) */ 197 #define EF_MIPS_32BITMODE 0x00000100 198 199 /* Four bit MIPS architecture field. */ 200 #define EF_MIPS_ARCH 0xf0000000 201 202 /* -mips1 code. */ 203 #define E_MIPS_ARCH_1 0x00000000 204 205 /* -mips2 code. */ 206 #define E_MIPS_ARCH_2 0x10000000 207 208 /* -mips3 code. */ 209 #define E_MIPS_ARCH_3 0x20000000 210 211 /* -mips4 code. */ 212 #define E_MIPS_ARCH_4 0x30000000 213 214 /* -mips5 code. */ 215 #define E_MIPS_ARCH_5 0x40000000 216 217 /* -mips32 code. */ 218 #define E_MIPS_ARCH_32 0x50000000 219 220 /* -mips64 code. */ 221 #define E_MIPS_ARCH_64 0x60000000 222 223 /* -mips32r2 code. */ 224 #define E_MIPS_ARCH_32R2 0x70000000 225 226 /* -mips64r2 code. */ 227 #define E_MIPS_ARCH_64R2 0x80000000 228 229 /* The ABI of the file. Also see EF_MIPS_ABI2 above. */ 230 #define EF_MIPS_ABI 0x0000F000 231 232 /* The original o32 abi. */ 233 #define E_MIPS_ABI_O32 0x00001000 234 235 /* O32 extended to work on 64 bit architectures */ 236 #define E_MIPS_ABI_O64 0x00002000 237 238 /* EABI in 32 bit mode */ 239 #define E_MIPS_ABI_EABI32 0x00003000 240 241 /* EABI in 64 bit mode */ 242 #define E_MIPS_ABI_EABI64 0x00004000 243 244 245 /* Machine variant if we know it. This field was invented at Cygnus, 246 but it is hoped that other vendors will adopt it. If some standard 247 is developed, this code should be changed to follow it. */ 248 249 #define EF_MIPS_MACH 0x00FF0000 250 251 /* Cygnus is choosing values between 80 and 9F; 252 00 - 7F should be left for a future standard; 253 the rest are open. */ 254 255 #define E_MIPS_MACH_3900 0x00810000 256 #define E_MIPS_MACH_4010 0x00820000 257 #define E_MIPS_MACH_4100 0x00830000 258 #define E_MIPS_MACH_4650 0x00850000 259 #define E_MIPS_MACH_4120 0x00870000 260 #define E_MIPS_MACH_4111 0x00880000 261 #define E_MIPS_MACH_SB1 0x008a0000 262 #define E_MIPS_MACH_OCTEON 0x008b0000 263 #define E_MIPS_MACH_XLR 0x008c0000 264 #define E_MIPS_MACH_OCTEON2 0x008d0000 265 #define E_MIPS_MACH_5400 0x00910000 266 #define E_MIPS_MACH_5500 0x00980000 267 #define E_MIPS_MACH_9000 0x00990000 268 #define E_MIPS_MACH_LS2E 0x00A00000 269 #define E_MIPS_MACH_LS2F 0x00A10000 270 #define E_MIPS_MACH_LS3A 0x00A20000 271 272 /* Processor specific section indices. These sections do not actually 273 exist. Symbols with a st_shndx field corresponding to one of these 274 values have a special meaning. */ 275 276 /* Defined and allocated common symbol. Value is virtual address. If 277 relocated, alignment must be preserved. */ 278 #define SHN_MIPS_ACOMMON SHN_LORESERVE 279 280 /* Defined and allocated text symbol. Value is virtual address. 281 Occur in the dynamic symbol table of Alpha OSF/1 and Irix 5 executables. */ 282 #define SHN_MIPS_TEXT (SHN_LORESERVE + 1) 283 284 /* Defined and allocated data symbol. Value is virtual address. 285 Occur in the dynamic symbol table of Alpha OSF/1 and Irix 5 executables. */ 286 #define SHN_MIPS_DATA (SHN_LORESERVE + 2) 287 288 /* Small common symbol. */ 289 #define SHN_MIPS_SCOMMON (SHN_LORESERVE + 3) 290 291 /* Small undefined symbol. */ 292 #define SHN_MIPS_SUNDEFINED (SHN_LORESERVE + 4) 293 294 /* Processor specific section types. */ 295 296 /* Section contains the set of dynamic shared objects used when 297 statically linking. */ 298 #define SHT_MIPS_LIBLIST 0x70000000 299 300 /* I'm not sure what this is, but it's used on Irix 5. */ 301 #define SHT_MIPS_MSYM 0x70000001 302 303 /* Section contains list of symbols whose definitions conflict with 304 symbols defined in shared objects. */ 305 #define SHT_MIPS_CONFLICT 0x70000002 306 307 /* Section contains the global pointer table. */ 308 #define SHT_MIPS_GPTAB 0x70000003 309 310 /* Section contains microcode information. The exact format is 311 unspecified. */ 312 #define SHT_MIPS_UCODE 0x70000004 313 314 /* Section contains some sort of debugging information. The exact 315 format is unspecified. It's probably ECOFF symbols. */ 316 #define SHT_MIPS_DEBUG 0x70000005 317 318 /* Section contains register usage information. */ 319 #define SHT_MIPS_REGINFO 0x70000006 320 321 /* ??? */ 322 #define SHT_MIPS_PACKAGE 0x70000007 323 324 /* ??? */ 325 #define SHT_MIPS_PACKSYM 0x70000008 326 327 /* ??? */ 328 #define SHT_MIPS_RELD 0x70000009 329 330 /* Section contains interface information. */ 331 #define SHT_MIPS_IFACE 0x7000000b 332 333 /* Section contains description of contents of another section. */ 334 #define SHT_MIPS_CONTENT 0x7000000c 335 336 /* Section contains miscellaneous options. */ 337 #define SHT_MIPS_OPTIONS 0x7000000d 338 339 /* ??? */ 340 #define SHT_MIPS_SHDR 0x70000010 341 342 /* ??? */ 343 #define SHT_MIPS_FDESC 0x70000011 344 345 /* ??? */ 346 #define SHT_MIPS_EXTSYM 0x70000012 347 348 /* ??? */ 349 #define SHT_MIPS_DENSE 0x70000013 350 351 /* ??? */ 352 #define SHT_MIPS_PDESC 0x70000014 353 354 /* ??? */ 355 #define SHT_MIPS_LOCSYM 0x70000015 356 357 /* ??? */ 358 #define SHT_MIPS_AUXSYM 0x70000016 359 360 /* ??? */ 361 #define SHT_MIPS_OPTSYM 0x70000017 362 363 /* ??? */ 364 #define SHT_MIPS_LOCSTR 0x70000018 365 366 /* ??? */ 367 #define SHT_MIPS_LINE 0x70000019 368 369 /* ??? */ 370 #define SHT_MIPS_RFDESC 0x7000001a 371 372 /* Delta C++: symbol table */ 373 #define SHT_MIPS_DELTASYM 0x7000001b 374 375 /* Delta C++: instance table */ 376 #define SHT_MIPS_DELTAINST 0x7000001c 377 378 /* Delta C++: class table */ 379 #define SHT_MIPS_DELTACLASS 0x7000001d 380 381 /* DWARF debugging section. */ 382 #define SHT_MIPS_DWARF 0x7000001e 383 384 /* Delta C++: declarations */ 385 #define SHT_MIPS_DELTADECL 0x7000001f 386 387 /* List of libraries the binary depends on. Includes a time stamp, version 388 number. */ 389 #define SHT_MIPS_SYMBOL_LIB 0x70000020 390 391 /* Events section. */ 392 #define SHT_MIPS_EVENTS 0x70000021 393 394 /* ??? */ 395 #define SHT_MIPS_TRANSLATE 0x70000022 396 397 /* Special pixie sections */ 398 #define SHT_MIPS_PIXIE 0x70000023 399 400 /* Address translation table (for debug info) */ 401 #define SHT_MIPS_XLATE 0x70000024 402 403 /* SGI internal address translation table (for debug info) */ 404 #define SHT_MIPS_XLATE_DEBUG 0x70000025 405 406 /* Intermediate code */ 407 #define SHT_MIPS_WHIRL 0x70000026 408 409 /* C++ exception handling region info */ 410 #define SHT_MIPS_EH_REGION 0x70000027 411 412 /* Obsolete address translation table (for debug info) */ 413 #define SHT_MIPS_XLATE_OLD 0x70000028 414 415 /* Runtime procedure descriptor table exception information (ucode) ??? */ 416 #define SHT_MIPS_PDR_EXCEPTION 0x70000029 417 418 419 /* A section of type SHT_MIPS_LIBLIST contains an array of the 420 following structure. The sh_link field is the section index of the 421 string table. The sh_info field is the number of entries in the 422 section. */ 423 typedef struct 424 { 425 /* String table index for name of shared object. */ 426 unsigned long l_name; 427 /* Time stamp. */ 428 unsigned long l_time_stamp; 429 /* Checksum of symbol names and common sizes. */ 430 unsigned long l_checksum; 431 /* String table index for version. */ 432 unsigned long l_version; 433 /* Flags. */ 434 unsigned long l_flags; 435 } Elf32_Lib; 436 437 /* The external version of Elf32_Lib. */ 438 typedef struct 439 { 440 unsigned char l_name[4]; 441 unsigned char l_time_stamp[4]; 442 unsigned char l_checksum[4]; 443 unsigned char l_version[4]; 444 unsigned char l_flags[4]; 445 } Elf32_External_Lib; 446 447 /* The l_flags field of an Elf32_Lib structure may contain the 448 following flags. */ 449 450 /* Require an exact match at runtime. */ 451 #define LL_EXACT_MATCH 0x00000001 452 453 /* Ignore version incompatibilities at runtime. */ 454 #define LL_IGNORE_INT_VER 0x00000002 455 456 /* Require matching minor version number. */ 457 #define LL_REQUIRE_MINOR 0x00000004 458 459 /* ??? */ 460 #define LL_EXPORTS 0x00000008 461 462 /* Delay loading of this library until really needed. */ 463 #define LL_DELAY_LOAD 0x00000010 464 465 /* ??? Delta C++ stuff ??? */ 466 #define LL_DELTA 0x00000020 467 468 469 /* A section of type SHT_MIPS_CONFLICT is an array of indices into the 470 .dynsym section. Each element has the following type. */ 471 typedef unsigned long Elf32_Conflict; 472 typedef unsigned char Elf32_External_Conflict[4]; 473 474 typedef unsigned long Elf64_Conflict; 475 typedef unsigned char Elf64_External_Conflict[8]; 476 477 /* A section of type SHT_MIPS_GPTAB contains information about how 478 much GP space would be required for different -G arguments. This 479 information is only used so that the linker can provide informative 480 suggestions as to the best -G value to use. The sh_info field is 481 the index of the section for which this information applies. The 482 contents of the section are an array of the following union. The 483 first element uses the gt_header field. The remaining elements use 484 the gt_entry field. */ 485 typedef union 486 { 487 struct 488 { 489 /* -G value actually used for this object file. */ 490 unsigned long gt_current_g_value; 491 /* Unused. */ 492 unsigned long gt_unused; 493 } gt_header; 494 struct 495 { 496 /* If this -G argument has been used... */ 497 unsigned long gt_g_value; 498 /* ...this many GP section bytes would be required. */ 499 unsigned long gt_bytes; 500 } gt_entry; 501 } Elf32_gptab; 502 503 /* The external version of Elf32_gptab. */ 504 505 typedef union 506 { 507 struct 508 { 509 unsigned char gt_current_g_value[4]; 510 unsigned char gt_unused[4]; 511 } gt_header; 512 struct 513 { 514 unsigned char gt_g_value[4]; 515 unsigned char gt_bytes[4]; 516 } gt_entry; 517 } Elf32_External_gptab; 518 519 /* A section of type SHT_MIPS_REGINFO contains the following 520 structure. */ 521 typedef struct 522 { 523 /* Mask of general purpose registers used. */ 524 unsigned long ri_gprmask; 525 /* Mask of co-processor registers used. */ 526 unsigned long ri_cprmask[4]; 527 /* GP register value for this object file. */ 528 long ri_gp_value; 529 } Elf32_RegInfo; 530 531 /* The external version of the Elf_RegInfo structure. */ 532 typedef struct 533 { 534 unsigned char ri_gprmask[4]; 535 unsigned char ri_cprmask[4][4]; 536 unsigned char ri_gp_value[4]; 537 } Elf32_External_RegInfo; 538 539 /* MIPS ELF .reginfo swapping routines. */ 540 extern void bfd_mips_elf32_swap_reginfo_in 541 (bfd *, const Elf32_External_RegInfo *, Elf32_RegInfo *); 542 extern void bfd_mips_elf32_swap_reginfo_out 543 (bfd *, const Elf32_RegInfo *, Elf32_External_RegInfo *); 544 545 /* Processor specific section flags. */ 546 547 /* This section must be in the global data area. */ 548 #define SHF_MIPS_GPREL 0x10000000 549 550 /* This section should be merged. */ 551 #define SHF_MIPS_MERGE 0x20000000 552 553 /* This section contains address data of size implied by section 554 element size. */ 555 #define SHF_MIPS_ADDR 0x40000000 556 557 /* This section contains string data. */ 558 #define SHF_MIPS_STRING 0x80000000 559 560 /* This section may not be stripped. */ 561 #define SHF_MIPS_NOSTRIP 0x08000000 562 563 /* This section is local to threads. */ 564 #define SHF_MIPS_LOCAL 0x04000000 565 566 /* Linker should generate implicit weak names for this section. */ 567 #define SHF_MIPS_NAMES 0x02000000 568 569 /* Section contais text/data which may be replicated in other sections. 570 Linker should retain only one copy. */ 571 #define SHF_MIPS_NODUPES 0x01000000 572 573 /* Processor specific program header types. */ 574 575 /* Register usage information. Identifies one .reginfo section. */ 576 #define PT_MIPS_REGINFO 0x70000000 577 578 /* Runtime procedure table. */ 579 #define PT_MIPS_RTPROC 0x70000001 580 581 /* .MIPS.options section. */ 582 #define PT_MIPS_OPTIONS 0x70000002 583 584 /* Processor specific dynamic array tags. */ 585 586 /* 32 bit version number for runtime linker interface. */ 587 #define DT_MIPS_RLD_VERSION 0x70000001 588 589 /* Time stamp. */ 590 #define DT_MIPS_TIME_STAMP 0x70000002 591 592 /* Checksum of external strings and common sizes. */ 593 #define DT_MIPS_ICHECKSUM 0x70000003 594 595 /* Index of version string in string table. */ 596 #define DT_MIPS_IVERSION 0x70000004 597 598 /* 32 bits of flags. */ 599 #define DT_MIPS_FLAGS 0x70000005 600 601 /* Base address of the segment. */ 602 #define DT_MIPS_BASE_ADDRESS 0x70000006 603 604 /* ??? */ 605 #define DT_MIPS_MSYM 0x70000007 606 607 /* Address of .conflict section. */ 608 #define DT_MIPS_CONFLICT 0x70000008 609 610 /* Address of .liblist section. */ 611 #define DT_MIPS_LIBLIST 0x70000009 612 613 /* Number of local global offset table entries. */ 614 #define DT_MIPS_LOCAL_GOTNO 0x7000000a 615 616 /* Number of entries in the .conflict section. */ 617 #define DT_MIPS_CONFLICTNO 0x7000000b 618 619 /* Number of entries in the .liblist section. */ 620 #define DT_MIPS_LIBLISTNO 0x70000010 621 622 /* Number of entries in the .dynsym section. */ 623 #define DT_MIPS_SYMTABNO 0x70000011 624 625 /* Index of first external dynamic symbol not referenced locally. */ 626 #define DT_MIPS_UNREFEXTNO 0x70000012 627 628 /* Index of first dynamic symbol in global offset table. */ 629 #define DT_MIPS_GOTSYM 0x70000013 630 631 /* Number of page table entries in global offset table. */ 632 #define DT_MIPS_HIPAGENO 0x70000014 633 634 /* Address of run time loader map, used for debugging. */ 635 #define DT_MIPS_RLD_MAP 0x70000016 636 637 /* Delta C++ class definition. */ 638 #define DT_MIPS_DELTA_CLASS 0x70000017 639 640 /* Number of entries in DT_MIPS_DELTA_CLASS. */ 641 #define DT_MIPS_DELTA_CLASS_NO 0x70000018 642 643 /* Delta C++ class instances. */ 644 #define DT_MIPS_DELTA_INSTANCE 0x70000019 645 646 /* Number of entries in DT_MIPS_DELTA_INSTANCE. */ 647 #define DT_MIPS_DELTA_INSTANCE_NO 0x7000001a 648 649 /* Delta relocations. */ 650 #define DT_MIPS_DELTA_RELOC 0x7000001b 651 652 /* Number of entries in DT_MIPS_DELTA_RELOC. */ 653 #define DT_MIPS_DELTA_RELOC_NO 0x7000001c 654 655 /* Delta symbols that Delta relocations refer to. */ 656 #define DT_MIPS_DELTA_SYM 0x7000001d 657 658 /* Number of entries in DT_MIPS_DELTA_SYM. */ 659 #define DT_MIPS_DELTA_SYM_NO 0x7000001e 660 661 /* Delta symbols that hold class declarations. */ 662 #define DT_MIPS_DELTA_CLASSSYM 0x70000020 663 664 /* Number of entries in DT_MIPS_DELTA_CLASSSYM. */ 665 #define DT_MIPS_DELTA_CLASSSYM_NO 0x70000021 666 667 /* Flags indicating information about C++ flavor. */ 668 #define DT_MIPS_CXX_FLAGS 0x70000022 669 670 /* Pixie information (???). */ 671 #define DT_MIPS_PIXIE_INIT 0x70000023 672 673 /* Address of .MIPS.symlib */ 674 #define DT_MIPS_SYMBOL_LIB 0x70000024 675 676 /* The GOT index of the first PTE for a segment */ 677 #define DT_MIPS_LOCALPAGE_GOTIDX 0x70000025 678 679 /* The GOT index of the first PTE for a local symbol */ 680 #define DT_MIPS_LOCAL_GOTIDX 0x70000026 681 682 /* The GOT index of the first PTE for a hidden symbol */ 683 #define DT_MIPS_HIDDEN_GOTIDX 0x70000027 684 685 /* The GOT index of the first PTE for a protected symbol */ 686 #define DT_MIPS_PROTECTED_GOTIDX 0x70000028 687 688 /* Address of `.MIPS.options'. */ 689 #define DT_MIPS_OPTIONS 0x70000029 690 691 /* Address of `.interface'. */ 692 #define DT_MIPS_INTERFACE 0x7000002a 693 694 /* ??? */ 695 #define DT_MIPS_DYNSTR_ALIGN 0x7000002b 696 697 /* Size of the .interface section. */ 698 #define DT_MIPS_INTERFACE_SIZE 0x7000002c 699 700 /* Size of rld_text_resolve function stored in the GOT. */ 701 #define DT_MIPS_RLD_TEXT_RESOLVE_ADDR 0x7000002d 702 703 /* Default suffix of DSO to be added by rld on dlopen() calls. */ 704 #define DT_MIPS_PERF_SUFFIX 0x7000002e 705 706 /* Size of compact relocation section (O32). */ 707 #define DT_MIPS_COMPACT_SIZE 0x7000002f 708 709 /* GP value for auxiliary GOTs. */ 710 #define DT_MIPS_GP_VALUE 0x70000030 711 712 /* Address of auxiliary .dynamic. */ 713 #define DT_MIPS_AUX_DYNAMIC 0x70000031 714 715 /* Address of the base of the PLTGOT. */ 716 #define DT_MIPS_PLTGOT 0x70000032 717 718 /* Points to the base of a writable PLT. */ 719 #define DT_MIPS_RWPLT 0x70000034 720 721 /* Flags which may appear in a DT_MIPS_FLAGS entry. */ 722 723 /* No flags. */ 724 #define RHF_NONE 0x00000000 725 726 /* Uses shortcut pointers. */ 727 #define RHF_QUICKSTART 0x00000001 728 729 /* Hash size is not a power of two. */ 730 #define RHF_NOTPOT 0x00000002 731 732 /* Ignore LD_LIBRARY_PATH. */ 733 #define RHS_NO_LIBRARY_REPLACEMENT 0x00000004 734 735 /* DSO address may not be relocated. */ 736 #define RHF_NO_MOVE 0x00000008 737 738 /* SGI specific features. */ 739 #define RHF_SGI_ONLY 0x00000010 740 741 /* Guarantee that .init will finish executing before any non-init 742 code in DSO is called. */ 743 #define RHF_GUARANTEE_INIT 0x00000020 744 745 /* Contains Delta C++ code. */ 746 #define RHF_DELTA_C_PLUS_PLUS 0x00000040 747 748 /* Guarantee that .init will start executing before any non-init 749 code in DSO is called. */ 750 #define RHF_GUARANTEE_START_INIT 0x00000080 751 752 /* Generated by pixie. */ 753 #define RHF_PIXIE 0x00000100 754 755 /* Delay-load DSO by default. */ 756 #define RHF_DEFAULT_DELAY_LOAD 0x00000200 757 758 /* Object may be requickstarted */ 759 #define RHF_REQUICKSTART 0x00000400 760 761 /* Object has been requickstarted */ 762 #define RHF_REQUICKSTARTED 0x00000800 763 764 /* Generated by cord. */ 765 #define RHF_CORD 0x00001000 766 767 /* Object contains no unresolved undef symbols. */ 768 #define RHF_NO_UNRES_UNDEF 0x00002000 769 770 /* Symbol table is in a safe order. */ 771 #define RHF_RLD_ORDER_SAFE 0x00004000 772 773 /* Special values for the st_other field in the symbol table. These 774 are used in an Irix 5 dynamic symbol table. */ 775 776 #define STO_DEFAULT STV_DEFAULT 777 #define STO_INTERNAL STV_INTERNAL 778 #define STO_HIDDEN STV_HIDDEN 779 #define STO_PROTECTED STV_PROTECTED 780 781 /* Two topmost bits denote the MIPS ISA for .text symbols: 782 + 00 -- standard MIPS code, 783 + 10 -- microMIPS code, 784 + 11 -- MIPS16 code; requires the following two bits to be set too. 785 Note that one of the MIPS16 bits overlaps with STO_MIPS_PIC. See below 786 for details. */ 787 #define STO_MIPS_ISA (3 << 6) 788 789 /* The mask spanning the rest of MIPS psABI flags. At most one is expected 790 to be set except for STO_MIPS16. */ 791 #define STO_MIPS_FLAGS (~(STO_MIPS_ISA | ELF_ST_VISIBILITY (-1))) 792 793 /* The MIPS psABI was updated in 2008 with support for PLTs and copy 794 relocs. There are therefore two types of nonzero SHN_UNDEF functions: 795 PLT entries and traditional MIPS lazy binding stubs. We mark the former 796 with STO_MIPS_PLT to distinguish them from the latter. */ 797 #define STO_MIPS_PLT 0x8 798 #define ELF_ST_IS_MIPS_PLT(other) (((other) & STO_MIPS_FLAGS) == STO_MIPS_PLT) 799 #define ELF_ST_SET_MIPS_PLT(other) (((other) & ~STO_MIPS_FLAGS) | STO_MIPS_PLT) 800 801 /* This value is used to mark PIC functions in an object that mixes 802 PIC and non-PIC. Note that this bit overlaps with STO_MIPS16, 803 although MIPS16 symbols are never considered to be MIPS_PIC. */ 804 #define STO_MIPS_PIC 0x20 805 #define ELF_ST_IS_MIPS_PIC(other) (((other) & STO_MIPS_FLAGS) == STO_MIPS_PIC) 806 #define ELF_ST_SET_MIPS_PIC(other) (((other) & ~STO_MIPS_FLAGS) | STO_MIPS_PIC) 807 808 /* This value is used for a mips16 .text symbol. */ 809 #define STO_MIPS16 0xf0 810 #define ELF_ST_IS_MIPS16(other) (((other) & STO_MIPS16) == STO_MIPS16) 811 #define ELF_ST_SET_MIPS16(other) ((other) | STO_MIPS16) 812 813 /* This value is used for a microMIPS .text symbol. To distinguish from 814 STO_MIPS16, we set top two bits to be 10 to denote STO_MICROMIPS. The 815 mask is STO_MIPS_ISA. */ 816 #define STO_MICROMIPS (2 << 6) 817 #define ELF_ST_IS_MICROMIPS(other) (((other) & STO_MIPS_ISA) == STO_MICROMIPS) 818 #define ELF_ST_SET_MICROMIPS(other) (((other) & ~STO_MIPS_ISA) | STO_MICROMIPS) 819 820 /* Whether code compression (either of the MIPS16 or the microMIPS ASEs) 821 has been indicated for a .text symbol. */ 822 #define ELF_ST_IS_COMPRESSED(other) \ 823 (ELF_ST_IS_MIPS16 (other) || ELF_ST_IS_MICROMIPS (other)) 824 825 /* This bit is used on Irix to indicate a symbol whose definition 826 is optional - if, at final link time, it cannot be found, no 827 error message should be produced. */ 828 #define STO_OPTIONAL (1 << 2) 829 /* A macro to examine the STO_OPTIONAL bit. */ 830 #define ELF_MIPS_IS_OPTIONAL(other) ((other) & STO_OPTIONAL) 831 832 /* The 64-bit MIPS ELF ABI uses an unusual reloc format. Each 833 relocation entry specifies up to three actual relocations, all at 834 the same address. The first relocation which required a symbol 835 uses the symbol in the r_sym field. The second relocation which 836 requires a symbol uses the symbol in the r_ssym field. If all 837 three relocations require a symbol, the third one uses a zero 838 value. */ 839 840 /* An entry in a 64 bit SHT_REL section. */ 841 842 typedef struct 843 { 844 /* Address of relocation. */ 845 unsigned char r_offset[8]; 846 /* Symbol index. */ 847 unsigned char r_sym[4]; 848 /* Special symbol. */ 849 unsigned char r_ssym[1]; 850 /* Third relocation. */ 851 unsigned char r_type3[1]; 852 /* Second relocation. */ 853 unsigned char r_type2[1]; 854 /* First relocation. */ 855 unsigned char r_type[1]; 856 } Elf64_Mips_External_Rel; 857 858 typedef struct 859 { 860 /* Address of relocation. */ 861 bfd_vma r_offset; 862 /* Symbol index. */ 863 unsigned long r_sym; 864 /* Special symbol. */ 865 unsigned char r_ssym; 866 /* Third relocation. */ 867 unsigned char r_type3; 868 /* Second relocation. */ 869 unsigned char r_type2; 870 /* First relocation. */ 871 unsigned char r_type; 872 } Elf64_Mips_Internal_Rel; 873 874 /* An entry in a 64 bit SHT_RELA section. */ 875 876 typedef struct 877 { 878 /* Address of relocation. */ 879 unsigned char r_offset[8]; 880 /* Symbol index. */ 881 unsigned char r_sym[4]; 882 /* Special symbol. */ 883 unsigned char r_ssym[1]; 884 /* Third relocation. */ 885 unsigned char r_type3[1]; 886 /* Second relocation. */ 887 unsigned char r_type2[1]; 888 /* First relocation. */ 889 unsigned char r_type[1]; 890 /* Addend. */ 891 unsigned char r_addend[8]; 892 } Elf64_Mips_External_Rela; 893 894 typedef struct 895 { 896 /* Address of relocation. */ 897 bfd_vma r_offset; 898 /* Symbol index. */ 899 unsigned long r_sym; 900 /* Special symbol. */ 901 unsigned char r_ssym; 902 /* Third relocation. */ 903 unsigned char r_type3; 904 /* Second relocation. */ 905 unsigned char r_type2; 906 /* First relocation. */ 907 unsigned char r_type; 908 /* Addend. */ 909 bfd_signed_vma r_addend; 910 } Elf64_Mips_Internal_Rela; 911 912 /* MIPS ELF 64 relocation info access macros. */ 913 #define ELF64_MIPS_R_SSYM(i) (((i) >> 24) & 0xff) 914 #define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff) 915 #define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff) 916 #define ELF64_MIPS_R_TYPE(i) ((i) & 0xff) 917 918 /* Values found in the r_ssym field of a relocation entry. */ 919 920 /* No relocation. */ 921 #define RSS_UNDEF 0 922 923 /* Value of GP. */ 924 #define RSS_GP 1 925 926 /* Value of GP in object being relocated. */ 927 #define RSS_GP0 2 928 929 /* Address of location being relocated. */ 930 #define RSS_LOC 3 931 932 /* A SHT_MIPS_OPTIONS section contains a series of options, each of 933 which starts with this header. */ 934 935 typedef struct 936 { 937 /* Type of option. */ 938 unsigned char kind[1]; 939 /* Size of option descriptor, including header. */ 940 unsigned char size[1]; 941 /* Section index of affected section, or 0 for global option. */ 942 unsigned char section[2]; 943 /* Information specific to this kind of option. */ 944 unsigned char info[4]; 945 } Elf_External_Options; 946 947 typedef struct 948 { 949 /* Type of option. */ 950 unsigned char kind; 951 /* Size of option descriptor, including header. */ 952 unsigned char size; 953 /* Section index of affected section, or 0 for global option. */ 954 unsigned short section; 955 /* Information specific to this kind of option. */ 956 unsigned long info; 957 } Elf_Internal_Options; 958 959 /* MIPS ELF option header swapping routines. */ 960 extern void bfd_mips_elf_swap_options_in 961 (bfd *, const Elf_External_Options *, Elf_Internal_Options *); 962 extern void bfd_mips_elf_swap_options_out 963 (bfd *, const Elf_Internal_Options *, Elf_External_Options *); 964 965 /* Values which may appear in the kind field of an Elf_Options 966 structure. */ 967 968 /* Undefined. */ 969 #define ODK_NULL 0 970 971 /* Register usage and GP value. */ 972 #define ODK_REGINFO 1 973 974 /* Exception processing information. */ 975 #define ODK_EXCEPTIONS 2 976 977 /* Section padding information. */ 978 #define ODK_PAD 3 979 980 /* Hardware workarounds performed. */ 981 #define ODK_HWPATCH 4 982 983 /* Fill value used by the linker. */ 984 #define ODK_FILL 5 985 986 /* Reserved space for desktop tools. */ 987 #define ODK_TAGS 6 988 989 /* Hardware workarounds, AND bits when merging. */ 990 #define ODK_HWAND 7 991 992 /* Hardware workarounds, OR bits when merging. */ 993 #define ODK_HWOR 8 994 995 /* GP group to use for text/data sections. */ 996 #define ODK_GP_GROUP 9 997 998 /* ID information. */ 999 #define ODK_IDENT 10 1000 1001 /* In the 32 bit ABI, an ODK_REGINFO option is just a Elf32_RegInfo 1002 structure. In the 64 bit ABI, it is the following structure. The 1003 info field of the options header is not used. */ 1004 1005 typedef struct 1006 { 1007 /* Mask of general purpose registers used. */ 1008 unsigned char ri_gprmask[4]; 1009 /* Padding. */ 1010 unsigned char ri_pad[4]; 1011 /* Mask of co-processor registers used. */ 1012 unsigned char ri_cprmask[4][4]; 1013 /* GP register value for this object file. */ 1014 unsigned char ri_gp_value[8]; 1015 } Elf64_External_RegInfo; 1016 1017 typedef struct 1018 { 1019 /* Mask of general purpose registers used. */ 1020 unsigned long ri_gprmask; 1021 /* Padding. */ 1022 unsigned long ri_pad; 1023 /* Mask of co-processor registers used. */ 1024 unsigned long ri_cprmask[4]; 1025 /* GP register value for this object file. */ 1026 bfd_vma ri_gp_value; 1027 } Elf64_Internal_RegInfo; 1028 1029 typedef struct 1030 { 1031 /* The hash value computed from the name of the corresponding 1032 dynamic symbol. */ 1033 unsigned char ms_hash_value[4]; 1034 /* Contains both the dynamic relocation index and the symbol flags 1035 field. The macros ELF32_MS_REL_INDEX and ELF32_MS_FLAGS are used 1036 to access the individual values. The dynamic relocation index 1037 identifies the first entry in the .rel.dyn section that 1038 references the dynamic symbol corresponding to this msym entry. 1039 If the index is 0, no dynamic relocations are associated with the 1040 symbol. The symbol flags field is reserved for future use. */ 1041 unsigned char ms_info[4]; 1042 } Elf32_External_Msym; 1043 1044 typedef struct 1045 { 1046 /* The hash value computed from the name of the corresponding 1047 dynamic symbol. */ 1048 unsigned long ms_hash_value; 1049 /* Contains both the dynamic relocation index and the symbol flags 1050 field. The macros ELF32_MS_REL_INDEX and ELF32_MS_FLAGS are used 1051 to access the individual values. The dynamic relocation index 1052 identifies the first entry in the .rel.dyn section that 1053 references the dynamic symbol corresponding to this msym entry. 1054 If the index is 0, no dynamic relocations are associated with the 1055 symbol. The symbol flags field is reserved for future use. */ 1056 unsigned long ms_info; 1057 } Elf32_Internal_Msym; 1058 1059 #define ELF32_MS_REL_INDEX(i) ((i) >> 8) 1060 #define ELF32_MS_FLAGS(i) (i) & 0xff) 1061 #define ELF32_MS_INFO(r, f) (((r) << 8) + ((f) & 0xff)) 1062 1063 /* MIPS ELF reginfo swapping routines. */ 1064 extern void bfd_mips_elf64_swap_reginfo_in 1065 (bfd *, const Elf64_External_RegInfo *, Elf64_Internal_RegInfo *); 1066 extern void bfd_mips_elf64_swap_reginfo_out 1067 (bfd *, const Elf64_Internal_RegInfo *, Elf64_External_RegInfo *); 1068 1069 /* Masks for the info work of an ODK_EXCEPTIONS descriptor. */ 1070 #define OEX_FPU_MIN 0x1f /* FPEs which must be enabled. */ 1071 #define OEX_FPU_MAX 0x1f00 /* FPEs which may be enabled. */ 1072 #define OEX_PAGE0 0x10000 /* Page zero must be mapped. */ 1073 #define OEX_SMM 0x20000 /* Force sequential memory mode. */ 1074 #define OEX_FPDBUG 0x40000 /* Force precise floating-point 1075 exceptions (debug mode). */ 1076 #define OEX_DISMISS 0x80000 /* Dismiss invalid address faults. */ 1077 1078 /* Masks of the FP exceptions for OEX_FPU_MIN and OEX_FPU_MAX. */ 1079 #define OEX_FPU_INVAL 0x10 /* Invalid operation exception. */ 1080 #define OEX_FPU_DIV0 0x08 /* Division by zero exception. */ 1081 #define OEX_FPU_OFLO 0x04 /* Overflow exception. */ 1082 #define OEX_FPU_UFLO 0x02 /* Underflow exception. */ 1083 #define OEX_FPU_INEX 0x01 /* Inexact exception. */ 1084 1085 /* Masks for the info word of an ODK_PAD descriptor. */ 1086 #define OPAD_PREFIX 0x01 1087 #define OPAD_POSTFIX 0x02 1088 #define OPAD_SYMBOL 0x04 1089 1090 /* Masks for the info word of an ODK_HWPATCH descriptor. */ 1091 #define OHW_R4KEOP 0x00000001 /* R4000 end-of-page patch. */ 1092 #define OHW_R8KPFETCH 0x00000002 /* May need R8000 prefetch patch. */ 1093 #define OHW_R5KEOP 0x00000004 /* R5000 end-of-page patch. */ 1094 #define OHW_R5KCVTL 0x00000008 /* R5000 cvt.[ds].l bug 1095 (clean == 1). */ 1096 #define OHW_R10KLDL 0x00000010 /* Needs R10K misaligned 1097 load patch. */ 1098 1099 /* Masks for the info word of an ODK_IDENT/ODK_GP_GROUP descriptor. */ 1100 #define OGP_GROUP 0x0000ffff /* GP group number. */ 1101 #define OGP_SELF 0xffff0000 /* Self-contained GP groups. */ 1102 1103 /* Masks for the info word of an ODK_HWAND/ODK_HWOR descriptor. */ 1104 #define OHWA0_R4KEOP_CHECKED 0x00000001 1105 #define OHWA0_R4KEOP_CLEAN 0x00000002 1106 1107 1108 /* Object attribute tags. */ 1109 enum 1110 { 1111 /* 0-3 are generic. */ 1112 Tag_GNU_MIPS_ABI_FP = 4, /* Value 1 for hard-float -mdouble-float, 2 1113 for hard-float -msingle-float, 3 for 1114 soft-float, 4 for -mips32r2 -mfp64; 0 for 1115 not tagged or not using any ABIs affected 1116 by the differences. */ 1117 }; 1118 1119 #endif /* _ELF_MIPS_H */ 1120