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