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