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