include/elf/mips.h

   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 \f
 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 \f
 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 \f
 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 \f
 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 \f
 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 \f
 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 \f
 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 \f
 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 \f
 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 \f
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 */