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 #define E_MIPS_MACH_LS3A 0x00A20000 226 227 /* Processor specific section indices. These sections do not actually 228 exist. Symbols with a st_shndx field corresponding to one of these 229 values have a special meaning. */ 230 231 /* Defined and allocated common symbol. Value is virtual address. If 232 relocated, alignment must be preserved. */ 233 #define SHN_MIPS_ACOMMON SHN_LORESERVE 234 235 /* Defined and allocated text symbol. Value is virtual address. 236 Occur in the dynamic symbol table of Alpha OSF/1 and Irix 5 executables. */ 237 #define SHN_MIPS_TEXT (SHN_LORESERVE + 1) 238 239 /* Defined and allocated data symbol. Value is virtual address. 240 Occur in the dynamic symbol table of Alpha OSF/1 and Irix 5 executables. */ 241 #define SHN_MIPS_DATA (SHN_LORESERVE + 2) 242 243 /* Small common symbol. */ 244 #define SHN_MIPS_SCOMMON (SHN_LORESERVE + 3) 245 246 /* Small undefined symbol. */ 247 #define SHN_MIPS_SUNDEFINED (SHN_LORESERVE + 4) 248 249 /* Processor specific section types. */ 250 251 /* Section contains the set of dynamic shared objects used when 252 statically linking. */ 253 #define SHT_MIPS_LIBLIST 0x70000000 254 255 /* I'm not sure what this is, but it's used on Irix 5. */ 256 #define SHT_MIPS_MSYM 0x70000001 257 258 /* Section contains list of symbols whose definitions conflict with 259 symbols defined in shared objects. */ 260 #define SHT_MIPS_CONFLICT 0x70000002 261 262 /* Section contains the global pointer table. */ 263 #define SHT_MIPS_GPTAB 0x70000003 264 265 /* Section contains microcode information. The exact format is 266 unspecified. */ 267 #define SHT_MIPS_UCODE 0x70000004 268 269 /* Section contains some sort of debugging information. The exact 270 format is unspecified. It's probably ECOFF symbols. */ 271 #define SHT_MIPS_DEBUG 0x70000005 272 273 /* Section contains register usage information. */ 274 #define SHT_MIPS_REGINFO 0x70000006 275 276 /* ??? */ 277 #define SHT_MIPS_PACKAGE 0x70000007 278 279 /* ??? */ 280 #define SHT_MIPS_PACKSYM 0x70000008 281 282 /* ??? */ 283 #define SHT_MIPS_RELD 0x70000009 284 285 /* Section contains interface information. */ 286 #define SHT_MIPS_IFACE 0x7000000b 287 288 /* Section contains description of contents of another section. */ 289 #define SHT_MIPS_CONTENT 0x7000000c 290 291 /* Section contains miscellaneous options. */ 292 #define SHT_MIPS_OPTIONS 0x7000000d 293 294 /* ??? */ 295 #define SHT_MIPS_SHDR 0x70000010 296 297 /* ??? */ 298 #define SHT_MIPS_FDESC 0x70000011 299 300 /* ??? */ 301 #define SHT_MIPS_EXTSYM 0x70000012 302 303 /* ??? */ 304 #define SHT_MIPS_DENSE 0x70000013 305 306 /* ??? */ 307 #define SHT_MIPS_PDESC 0x70000014 308 309 /* ??? */ 310 #define SHT_MIPS_LOCSYM 0x70000015 311 312 /* ??? */ 313 #define SHT_MIPS_AUXSYM 0x70000016 314 315 /* ??? */ 316 #define SHT_MIPS_OPTSYM 0x70000017 317 318 /* ??? */ 319 #define SHT_MIPS_LOCSTR 0x70000018 320 321 /* ??? */ 322 #define SHT_MIPS_LINE 0x70000019 323 324 /* ??? */ 325 #define SHT_MIPS_RFDESC 0x7000001a 326 327 /* Delta C++: symbol table */ 328 #define SHT_MIPS_DELTASYM 0x7000001b 329 330 /* Delta C++: instance table */ 331 #define SHT_MIPS_DELTAINST 0x7000001c 332 333 /* Delta C++: class table */ 334 #define SHT_MIPS_DELTACLASS 0x7000001d 335 336 /* DWARF debugging section. */ 337 #define SHT_MIPS_DWARF 0x7000001e 338 339 /* Delta C++: declarations */ 340 #define SHT_MIPS_DELTADECL 0x7000001f 341 342 /* List of libraries the binary depends on. Includes a time stamp, version 343 number. */ 344 #define SHT_MIPS_SYMBOL_LIB 0x70000020 345 346 /* Events section. */ 347 #define SHT_MIPS_EVENTS 0x70000021 348 349 /* ??? */ 350 #define SHT_MIPS_TRANSLATE 0x70000022 351 352 /* Special pixie sections */ 353 #define SHT_MIPS_PIXIE 0x70000023 354 355 /* Address translation table (for debug info) */ 356 #define SHT_MIPS_XLATE 0x70000024 357 358 /* SGI internal address translation table (for debug info) */ 359 #define SHT_MIPS_XLATE_DEBUG 0x70000025 360 361 /* Intermediate code */ 362 #define SHT_MIPS_WHIRL 0x70000026 363 364 /* C++ exception handling region info */ 365 #define SHT_MIPS_EH_REGION 0x70000027 366 367 /* Obsolete address translation table (for debug info) */ 368 #define SHT_MIPS_XLATE_OLD 0x70000028 369 370 /* Runtime procedure descriptor table exception information (ucode) ??? */ 371 #define SHT_MIPS_PDR_EXCEPTION 0x70000029 372 373 374 /* A section of type SHT_MIPS_LIBLIST contains an array of the 375 following structure. The sh_link field is the section index of the 376 string table. The sh_info field is the number of entries in the 377 section. */ 378 typedef struct 379 { 380 /* String table index for name of shared object. */ 381 unsigned long l_name; 382 /* Time stamp. */ 383 unsigned long l_time_stamp; 384 /* Checksum of symbol names and common sizes. */ 385 unsigned long l_checksum; 386 /* String table index for version. */ 387 unsigned long l_version; 388 /* Flags. */ 389 unsigned long l_flags; 390 } Elf32_Lib; 391 392 /* The external version of Elf32_Lib. */ 393 typedef struct 394 { 395 unsigned char l_name[4]; 396 unsigned char l_time_stamp[4]; 397 unsigned char l_checksum[4]; 398 unsigned char l_version[4]; 399 unsigned char l_flags[4]; 400 } Elf32_External_Lib; 401 402 /* The l_flags field of an Elf32_Lib structure may contain the 403 following flags. */ 404 405 /* Require an exact match at runtime. */ 406 #define LL_EXACT_MATCH 0x00000001 407 408 /* Ignore version incompatibilities at runtime. */ 409 #define LL_IGNORE_INT_VER 0x00000002 410 411 /* Require matching minor version number. */ 412 #define LL_REQUIRE_MINOR 0x00000004 413 414 /* ??? */ 415 #define LL_EXPORTS 0x00000008 416 417 /* Delay loading of this library until really needed. */ 418 #define LL_DELAY_LOAD 0x00000010 419 420 /* ??? Delta C++ stuff ??? */ 421 #define LL_DELTA 0x00000020 422 423 424 /* A section of type SHT_MIPS_CONFLICT is an array of indices into the 425 .dynsym section. Each element has the following type. */ 426 typedef unsigned long Elf32_Conflict; 427 typedef unsigned char Elf32_External_Conflict[4]; 428 429 typedef unsigned long Elf64_Conflict; 430 typedef unsigned char Elf64_External_Conflict[8]; 431 432 /* A section of type SHT_MIPS_GPTAB contains information about how 433 much GP space would be required for different -G arguments. This 434 information is only used so that the linker can provide informative 435 suggestions as to the best -G value to use. The sh_info field is 436 the index of the section for which this information applies. The 437 contents of the section are an array of the following union. The 438 first element uses the gt_header field. The remaining elements use 439 the gt_entry field. */ 440 typedef union 441 { 442 struct 443 { 444 /* -G value actually used for this object file. */ 445 unsigned long gt_current_g_value; 446 /* Unused. */ 447 unsigned long gt_unused; 448 } gt_header; 449 struct 450 { 451 /* If this -G argument has been used... */ 452 unsigned long gt_g_value; 453 /* ...this many GP section bytes would be required. */ 454 unsigned long gt_bytes; 455 } gt_entry; 456 } Elf32_gptab; 457 458 /* The external version of Elf32_gptab. */ 459 460 typedef union 461 { 462 struct 463 { 464 unsigned char gt_current_g_value[4]; 465 unsigned char gt_unused[4]; 466 } gt_header; 467 struct 468 { 469 unsigned char gt_g_value[4]; 470 unsigned char gt_bytes[4]; 471 } gt_entry; 472 } Elf32_External_gptab; 473 474 /* A section of type SHT_MIPS_REGINFO contains the following 475 structure. */ 476 typedef struct 477 { 478 /* Mask of general purpose registers used. */ 479 unsigned long ri_gprmask; 480 /* Mask of co-processor registers used. */ 481 unsigned long ri_cprmask[4]; 482 /* GP register value for this object file. */ 483 long ri_gp_value; 484 } Elf32_RegInfo; 485 486 /* The external version of the Elf_RegInfo structure. */ 487 typedef struct 488 { 489 unsigned char ri_gprmask[4]; 490 unsigned char ri_cprmask[4][4]; 491 unsigned char ri_gp_value[4]; 492 } Elf32_External_RegInfo; 493 494 /* MIPS ELF .reginfo swapping routines. */ 495 extern void bfd_mips_elf32_swap_reginfo_in 496 (bfd *, const Elf32_External_RegInfo *, Elf32_RegInfo *); 497 extern void bfd_mips_elf32_swap_reginfo_out 498 (bfd *, const Elf32_RegInfo *, Elf32_External_RegInfo *); 499 500 /* Processor specific section flags. */ 501 502 /* This section must be in the global data area. */ 503 #define SHF_MIPS_GPREL 0x10000000 504 505 /* This section should be merged. */ 506 #define SHF_MIPS_MERGE 0x20000000 507 508 /* This section contains address data of size implied by section 509 element size. */ 510 #define SHF_MIPS_ADDR 0x40000000 511 512 /* This section contains string data. */ 513 #define SHF_MIPS_STRING 0x80000000 514 515 /* This section may not be stripped. */ 516 #define SHF_MIPS_NOSTRIP 0x08000000 517 518 /* This section is local to threads. */ 519 #define SHF_MIPS_LOCAL 0x04000000 520 521 /* Linker should generate implicit weak names for this section. */ 522 #define SHF_MIPS_NAMES 0x02000000 523 524 /* Section contais text/data which may be replicated in other sections. 525 Linker should retain only one copy. */ 526 #define SHF_MIPS_NODUPES 0x01000000 527 528 /* Processor specific program header types. */ 529 530 /* Register usage information. Identifies one .reginfo section. */ 531 #define PT_MIPS_REGINFO 0x70000000 532 533 /* Runtime procedure table. */ 534 #define PT_MIPS_RTPROC 0x70000001 535 536 /* .MIPS.options section. */ 537 #define PT_MIPS_OPTIONS 0x70000002 538 539 /* Processor specific dynamic array tags. */ 540 541 /* 32 bit version number for runtime linker interface. */ 542 #define DT_MIPS_RLD_VERSION 0x70000001 543 544 /* Time stamp. */ 545 #define DT_MIPS_TIME_STAMP 0x70000002 546 547 /* Checksum of external strings and common sizes. */ 548 #define DT_MIPS_ICHECKSUM 0x70000003 549 550 /* Index of version string in string table. */ 551 #define DT_MIPS_IVERSION 0x70000004 552 553 /* 32 bits of flags. */ 554 #define DT_MIPS_FLAGS 0x70000005 555 556 /* Base address of the segment. */ 557 #define DT_MIPS_BASE_ADDRESS 0x70000006 558 559 /* ??? */ 560 #define DT_MIPS_MSYM 0x70000007 561 562 /* Address of .conflict section. */ 563 #define DT_MIPS_CONFLICT 0x70000008 564 565 /* Address of .liblist section. */ 566 #define DT_MIPS_LIBLIST 0x70000009 567 568 /* Number of local global offset table entries. */ 569 #define DT_MIPS_LOCAL_GOTNO 0x7000000a 570 571 /* Number of entries in the .conflict section. */ 572 #define DT_MIPS_CONFLICTNO 0x7000000b 573 574 /* Number of entries in the .liblist section. */ 575 #define DT_MIPS_LIBLISTNO 0x70000010 576 577 /* Number of entries in the .dynsym section. */ 578 #define DT_MIPS_SYMTABNO 0x70000011 579 580 /* Index of first external dynamic symbol not referenced locally. */ 581 #define DT_MIPS_UNREFEXTNO 0x70000012 582 583 /* Index of first dynamic symbol in global offset table. */ 584 #define DT_MIPS_GOTSYM 0x70000013 585 586 /* Number of page table entries in global offset table. */ 587 #define DT_MIPS_HIPAGENO 0x70000014 588 589 /* Address of run time loader map, used for debugging. */ 590 #define DT_MIPS_RLD_MAP 0x70000016 591 592 /* Delta C++ class definition. */ 593 #define DT_MIPS_DELTA_CLASS 0x70000017 594 595 /* Number of entries in DT_MIPS_DELTA_CLASS. */ 596 #define DT_MIPS_DELTA_CLASS_NO 0x70000018 597 598 /* Delta C++ class instances. */ 599 #define DT_MIPS_DELTA_INSTANCE 0x70000019 600 601 /* Number of entries in DT_MIPS_DELTA_INSTANCE. */ 602 #define DT_MIPS_DELTA_INSTANCE_NO 0x7000001a 603 604 /* Delta relocations. */ 605 #define DT_MIPS_DELTA_RELOC 0x7000001b 606 607 /* Number of entries in DT_MIPS_DELTA_RELOC. */ 608 #define DT_MIPS_DELTA_RELOC_NO 0x7000001c 609 610 /* Delta symbols that Delta relocations refer to. */ 611 #define DT_MIPS_DELTA_SYM 0x7000001d 612 613 /* Number of entries in DT_MIPS_DELTA_SYM. */ 614 #define DT_MIPS_DELTA_SYM_NO 0x7000001e 615 616 /* Delta symbols that hold class declarations. */ 617 #define DT_MIPS_DELTA_CLASSSYM 0x70000020 618 619 /* Number of entries in DT_MIPS_DELTA_CLASSSYM. */ 620 #define DT_MIPS_DELTA_CLASSSYM_NO 0x70000021 621 622 /* Flags indicating information about C++ flavor. */ 623 #define DT_MIPS_CXX_FLAGS 0x70000022 624 625 /* Pixie information (???). */ 626 #define DT_MIPS_PIXIE_INIT 0x70000023 627 628 /* Address of .MIPS.symlib */ 629 #define DT_MIPS_SYMBOL_LIB 0x70000024 630 631 /* The GOT index of the first PTE for a segment */ 632 #define DT_MIPS_LOCALPAGE_GOTIDX 0x70000025 633 634 /* The GOT index of the first PTE for a local symbol */ 635 #define DT_MIPS_LOCAL_GOTIDX 0x70000026 636 637 /* The GOT index of the first PTE for a hidden symbol */ 638 #define DT_MIPS_HIDDEN_GOTIDX 0x70000027 639 640 /* The GOT index of the first PTE for a protected symbol */ 641 #define DT_MIPS_PROTECTED_GOTIDX 0x70000028 642 643 /* Address of `.MIPS.options'. */ 644 #define DT_MIPS_OPTIONS 0x70000029 645 646 /* Address of `.interface'. */ 647 #define DT_MIPS_INTERFACE 0x7000002a 648 649 /* ??? */ 650 #define DT_MIPS_DYNSTR_ALIGN 0x7000002b 651 652 /* Size of the .interface section. */ 653 #define DT_MIPS_INTERFACE_SIZE 0x7000002c 654 655 /* Size of rld_text_resolve function stored in the GOT. */ 656 #define DT_MIPS_RLD_TEXT_RESOLVE_ADDR 0x7000002d 657 658 /* Default suffix of DSO to be added by rld on dlopen() calls. */ 659 #define DT_MIPS_PERF_SUFFIX 0x7000002e 660 661 /* Size of compact relocation section (O32). */ 662 #define DT_MIPS_COMPACT_SIZE 0x7000002f 663 664 /* GP value for auxiliary GOTs. */ 665 #define DT_MIPS_GP_VALUE 0x70000030 666 667 /* Address of auxiliary .dynamic. */ 668 #define DT_MIPS_AUX_DYNAMIC 0x70000031 669 670 /* Address of the base of the PLTGOT. */ 671 #define DT_MIPS_PLTGOT 0x70000032 672 673 /* Points to the base of a writable PLT. */ 674 #define DT_MIPS_RWPLT 0x70000034 675 676 /* Flags which may appear in a DT_MIPS_FLAGS entry. */ 677 678 /* No flags. */ 679 #define RHF_NONE 0x00000000 680 681 /* Uses shortcut pointers. */ 682 #define RHF_QUICKSTART 0x00000001 683 684 /* Hash size is not a power of two. */ 685 #define RHF_NOTPOT 0x00000002 686 687 /* Ignore LD_LIBRARY_PATH. */ 688 #define RHS_NO_LIBRARY_REPLACEMENT 0x00000004 689 690 /* DSO address may not be relocated. */ 691 #define RHF_NO_MOVE 0x00000008 692 693 /* SGI specific features. */ 694 #define RHF_SGI_ONLY 0x00000010 695 696 /* Guarantee that .init will finish executing before any non-init 697 code in DSO is called. */ 698 #define RHF_GUARANTEE_INIT 0x00000020 699 700 /* Contains Delta C++ code. */ 701 #define RHF_DELTA_C_PLUS_PLUS 0x00000040 702 703 /* Guarantee that .init will start executing before any non-init 704 code in DSO is called. */ 705 #define RHF_GUARANTEE_START_INIT 0x00000080 706 707 /* Generated by pixie. */ 708 #define RHF_PIXIE 0x00000100 709 710 /* Delay-load DSO by default. */ 711 #define RHF_DEFAULT_DELAY_LOAD 0x00000200 712 713 /* Object may be requickstarted */ 714 #define RHF_REQUICKSTART 0x00000400 715 716 /* Object has been requickstarted */ 717 #define RHF_REQUICKSTARTED 0x00000800 718 719 /* Generated by cord. */ 720 #define RHF_CORD 0x00001000 721 722 /* Object contains no unresolved undef symbols. */ 723 #define RHF_NO_UNRES_UNDEF 0x00002000 724 725 /* Symbol table is in a safe order. */ 726 #define RHF_RLD_ORDER_SAFE 0x00004000 727 728 /* Special values for the st_other field in the symbol table. These 729 are used in an Irix 5 dynamic symbol table. */ 730 731 #define STO_DEFAULT STV_DEFAULT 732 #define STO_INTERNAL STV_INTERNAL 733 #define STO_HIDDEN STV_HIDDEN 734 #define STO_PROTECTED STV_PROTECTED 735 736 /* The MIPS psABI was updated in 2008 with support for PLTs and copy 737 relocs. There are therefore two types of nonzero SHN_UNDEF functions: 738 PLT entries and traditional MIPS lazy binding stubs. We mark the former 739 with STO_MIPS_PLT to distinguish them from the latter. */ 740 #define STO_MIPS_PLT 0x8 741 742 /* This value is used to mark PIC functions in an object that mixes 743 PIC and non-PIC. */ 744 #define STO_MIPS_PIC 0x20 745 #define ELF_ST_IS_MIPS_PIC(OTHER) \ 746 (((OTHER) & ~ELF_ST_VISIBILITY (-1)) == STO_MIPS_PIC) 747 #define ELF_ST_SET_MIPS_PIC(OTHER) \ 748 (STO_MIPS_PIC | ELF_ST_VISIBILITY (OTHER)) 749 750 /* This value is used for a mips16 .text symbol. */ 751 #define STO_MIPS16 0xf0 752 #define ELF_ST_IS_MIPS16(OTHER) (((OTHER) & 0xf0) == STO_MIPS16) 753 #define ELF_ST_SET_MIPS16(OTHER) (((OTHER) & ~0xf0) | STO_MIPS16) 754 755 /* This bit is used on Irix to indicate a symbol whose definition 756 is optional - if, at final link time, it cannot be found, no 757 error message should be produced. */ 758 #define STO_OPTIONAL (1 << 2) 759 /* A macro to examine the STO_OPTIONAL bit. */ 760 #define ELF_MIPS_IS_OPTIONAL(other) ((other) & STO_OPTIONAL) 761 762 /* The 64-bit MIPS ELF ABI uses an unusual reloc format. Each 763 relocation entry specifies up to three actual relocations, all at 764 the same address. The first relocation which required a symbol 765 uses the symbol in the r_sym field. The second relocation which 766 requires a symbol uses the symbol in the r_ssym field. If all 767 three relocations require a symbol, the third one uses a zero 768 value. */ 769 770 /* An entry in a 64 bit SHT_REL section. */ 771 772 typedef struct 773 { 774 /* Address of relocation. */ 775 unsigned char r_offset[8]; 776 /* Symbol index. */ 777 unsigned char r_sym[4]; 778 /* Special symbol. */ 779 unsigned char r_ssym[1]; 780 /* Third relocation. */ 781 unsigned char r_type3[1]; 782 /* Second relocation. */ 783 unsigned char r_type2[1]; 784 /* First relocation. */ 785 unsigned char r_type[1]; 786 } Elf64_Mips_External_Rel; 787 788 typedef struct 789 { 790 /* Address of relocation. */ 791 bfd_vma r_offset; 792 /* Symbol index. */ 793 unsigned long r_sym; 794 /* Special symbol. */ 795 unsigned char r_ssym; 796 /* Third relocation. */ 797 unsigned char r_type3; 798 /* Second relocation. */ 799 unsigned char r_type2; 800 /* First relocation. */ 801 unsigned char r_type; 802 } Elf64_Mips_Internal_Rel; 803 804 /* An entry in a 64 bit SHT_RELA section. */ 805 806 typedef struct 807 { 808 /* Address of relocation. */ 809 unsigned char r_offset[8]; 810 /* Symbol index. */ 811 unsigned char r_sym[4]; 812 /* Special symbol. */ 813 unsigned char r_ssym[1]; 814 /* Third relocation. */ 815 unsigned char r_type3[1]; 816 /* Second relocation. */ 817 unsigned char r_type2[1]; 818 /* First relocation. */ 819 unsigned char r_type[1]; 820 /* Addend. */ 821 unsigned char r_addend[8]; 822 } Elf64_Mips_External_Rela; 823 824 typedef struct 825 { 826 /* Address of relocation. */ 827 bfd_vma r_offset; 828 /* Symbol index. */ 829 unsigned long r_sym; 830 /* Special symbol. */ 831 unsigned char r_ssym; 832 /* Third relocation. */ 833 unsigned char r_type3; 834 /* Second relocation. */ 835 unsigned char r_type2; 836 /* First relocation. */ 837 unsigned char r_type; 838 /* Addend. */ 839 bfd_signed_vma r_addend; 840 } Elf64_Mips_Internal_Rela; 841 842 /* MIPS ELF 64 relocation info access macros. */ 843 #define ELF64_MIPS_R_SSYM(i) (((i) >> 24) & 0xff) 844 #define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff) 845 #define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff) 846 #define ELF64_MIPS_R_TYPE(i) ((i) & 0xff) 847 848 /* Values found in the r_ssym field of a relocation entry. */ 849 850 /* No relocation. */ 851 #define RSS_UNDEF 0 852 853 /* Value of GP. */ 854 #define RSS_GP 1 855 856 /* Value of GP in object being relocated. */ 857 #define RSS_GP0 2 858 859 /* Address of location being relocated. */ 860 #define RSS_LOC 3 861 862 /* A SHT_MIPS_OPTIONS section contains a series of options, each of 863 which starts with this header. */ 864 865 typedef struct 866 { 867 /* Type of option. */ 868 unsigned char kind[1]; 869 /* Size of option descriptor, including header. */ 870 unsigned char size[1]; 871 /* Section index of affected section, or 0 for global option. */ 872 unsigned char section[2]; 873 /* Information specific to this kind of option. */ 874 unsigned char info[4]; 875 } Elf_External_Options; 876 877 typedef struct 878 { 879 /* Type of option. */ 880 unsigned char kind; 881 /* Size of option descriptor, including header. */ 882 unsigned char size; 883 /* Section index of affected section, or 0 for global option. */ 884 unsigned short section; 885 /* Information specific to this kind of option. */ 886 unsigned long info; 887 } Elf_Internal_Options; 888 889 /* MIPS ELF option header swapping routines. */ 890 extern void bfd_mips_elf_swap_options_in 891 (bfd *, const Elf_External_Options *, Elf_Internal_Options *); 892 extern void bfd_mips_elf_swap_options_out 893 (bfd *, const Elf_Internal_Options *, Elf_External_Options *); 894 895 /* Values which may appear in the kind field of an Elf_Options 896 structure. */ 897 898 /* Undefined. */ 899 #define ODK_NULL 0 900 901 /* Register usage and GP value. */ 902 #define ODK_REGINFO 1 903 904 /* Exception processing information. */ 905 #define ODK_EXCEPTIONS 2 906 907 /* Section padding information. */ 908 #define ODK_PAD 3 909 910 /* Hardware workarounds performed. */ 911 #define ODK_HWPATCH 4 912 913 /* Fill value used by the linker. */ 914 #define ODK_FILL 5 915 916 /* Reserved space for desktop tools. */ 917 #define ODK_TAGS 6 918 919 /* Hardware workarounds, AND bits when merging. */ 920 #define ODK_HWAND 7 921 922 /* Hardware workarounds, OR bits when merging. */ 923 #define ODK_HWOR 8 924 925 /* GP group to use for text/data sections. */ 926 #define ODK_GP_GROUP 9 927 928 /* ID information. */ 929 #define ODK_IDENT 10 930 931 /* In the 32 bit ABI, an ODK_REGINFO option is just a Elf32_RegInfo 932 structure. In the 64 bit ABI, it is the following structure. The 933 info field of the options header is not used. */ 934 935 typedef struct 936 { 937 /* Mask of general purpose registers used. */ 938 unsigned char ri_gprmask[4]; 939 /* Padding. */ 940 unsigned char ri_pad[4]; 941 /* Mask of co-processor registers used. */ 942 unsigned char ri_cprmask[4][4]; 943 /* GP register value for this object file. */ 944 unsigned char ri_gp_value[8]; 945 } Elf64_External_RegInfo; 946 947 typedef struct 948 { 949 /* Mask of general purpose registers used. */ 950 unsigned long ri_gprmask; 951 /* Padding. */ 952 unsigned long ri_pad; 953 /* Mask of co-processor registers used. */ 954 unsigned long ri_cprmask[4]; 955 /* GP register value for this object file. */ 956 bfd_vma ri_gp_value; 957 } Elf64_Internal_RegInfo; 958 959 typedef struct 960 { 961 /* The hash value computed from the name of the corresponding 962 dynamic symbol. */ 963 unsigned char ms_hash_value[4]; 964 /* Contains both the dynamic relocation index and the symbol flags 965 field. The macros ELF32_MS_REL_INDEX and ELF32_MS_FLAGS are used 966 to access the individual values. The dynamic relocation index 967 identifies the first entry in the .rel.dyn section that 968 references the dynamic symbol corresponding to this msym entry. 969 If the index is 0, no dynamic relocations are associated with the 970 symbol. The symbol flags field is reserved for future use. */ 971 unsigned char ms_info[4]; 972 } Elf32_External_Msym; 973 974 typedef struct 975 { 976 /* The hash value computed from the name of the corresponding 977 dynamic symbol. */ 978 unsigned long ms_hash_value; 979 /* Contains both the dynamic relocation index and the symbol flags 980 field. The macros ELF32_MS_REL_INDEX and ELF32_MS_FLAGS are used 981 to access the individual values. The dynamic relocation index 982 identifies the first entry in the .rel.dyn section that 983 references the dynamic symbol corresponding to this msym entry. 984 If the index is 0, no dynamic relocations are associated with the 985 symbol. The symbol flags field is reserved for future use. */ 986 unsigned long ms_info; 987 } Elf32_Internal_Msym; 988 989 #define ELF32_MS_REL_INDEX(i) ((i) >> 8) 990 #define ELF32_MS_FLAGS(i) (i) & 0xff) 991 #define ELF32_MS_INFO(r, f) (((r) << 8) + ((f) & 0xff)) 992 993 /* MIPS ELF reginfo swapping routines. */ 994 extern void bfd_mips_elf64_swap_reginfo_in 995 (bfd *, const Elf64_External_RegInfo *, Elf64_Internal_RegInfo *); 996 extern void bfd_mips_elf64_swap_reginfo_out 997 (bfd *, const Elf64_Internal_RegInfo *, Elf64_External_RegInfo *); 998 999 /* Masks for the info work of an ODK_EXCEPTIONS descriptor. */ 1000 #define OEX_FPU_MIN 0x1f /* FPEs which must be enabled. */ 1001 #define OEX_FPU_MAX 0x1f00 /* FPEs which may be enabled. */ 1002 #define OEX_PAGE0 0x10000 /* Page zero must be mapped. */ 1003 #define OEX_SMM 0x20000 /* Force sequential memory mode. */ 1004 #define OEX_FPDBUG 0x40000 /* Force precise floating-point 1005 exceptions (debug mode). */ 1006 #define OEX_DISMISS 0x80000 /* Dismiss invalid address faults. */ 1007 1008 /* Masks of the FP exceptions for OEX_FPU_MIN and OEX_FPU_MAX. */ 1009 #define OEX_FPU_INVAL 0x10 /* Invalid operation exception. */ 1010 #define OEX_FPU_DIV0 0x08 /* Division by zero exception. */ 1011 #define OEX_FPU_OFLO 0x04 /* Overflow exception. */ 1012 #define OEX_FPU_UFLO 0x02 /* Underflow exception. */ 1013 #define OEX_FPU_INEX 0x01 /* Inexact exception. */ 1014 1015 /* Masks for the info word of an ODK_PAD descriptor. */ 1016 #define OPAD_PREFIX 0x01 1017 #define OPAD_POSTFIX 0x02 1018 #define OPAD_SYMBOL 0x04 1019 1020 /* Masks for the info word of an ODK_HWPATCH descriptor. */ 1021 #define OHW_R4KEOP 0x00000001 /* R4000 end-of-page patch. */ 1022 #define OHW_R8KPFETCH 0x00000002 /* May need R8000 prefetch patch. */ 1023 #define OHW_R5KEOP 0x00000004 /* R5000 end-of-page patch. */ 1024 #define OHW_R5KCVTL 0x00000008 /* R5000 cvt.[ds].l bug 1025 (clean == 1). */ 1026 #define OHW_R10KLDL 0x00000010 /* Needs R10K misaligned 1027 load patch. */ 1028 1029 /* Masks for the info word of an ODK_IDENT/ODK_GP_GROUP descriptor. */ 1030 #define OGP_GROUP 0x0000ffff /* GP group number. */ 1031 #define OGP_SELF 0xffff0000 /* Self-contained GP groups. */ 1032 1033 /* Masks for the info word of an ODK_HWAND/ODK_HWOR descriptor. */ 1034 #define OHWA0_R4KEOP_CHECKED 0x00000001 1035 #define OHWA0_R4KEOP_CLEAN 0x00000002 1036 1037 1038 /* Object attribute tags. */ 1039 enum 1040 { 1041 /* 0-3 are generic. */ 1042 Tag_GNU_MIPS_ABI_FP = 4, /* Value 1 for hard-float -mdouble-float, 2 1043 for hard-float -msingle-float, 3 for 1044 soft-float, 4 for -mips32r2 -mfp64; 0 for 1045 not tagged or not using any ABIs affected 1046 by the differences. */ 1047 }; 1048 1049 #endif /* _ELF_MIPS_H */ 1050