include/elf/mips.h

   1 /* MIPS ELF support for BFD.
   2    Copyright (C) 1993-2024 Free Software Foundation, Inc.
   3
   4    By Ian Lance Taylor, Cygnus Support, <ian@cygnus.com>, from
   5    information in the System V Application Binary Interface, MIPS
   6    Processor Supplement.
   7
   8    This file is part of BFD, the Binary File Descriptor library.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  23    MA 02110-1301, USA.  */
  24
  25 /* This file holds definitions specific to the MIPS ELF ABI.  Note
  26    that most of this is not actually implemented by BFD.  */
  27
  28 #ifndef _ELF_MIPS_H
  29 #define _ELF_MIPS_H
  30
  31 #include "elf/reloc-macros.h"
  32
  33 #ifdef __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 /* Relocation types.  */
  38 START_RELOC_NUMBERS (elf_mips_reloc_type)
  39   RELOC_NUMBER (R_MIPS_NONE, 0)
  40   RELOC_NUMBER (R_MIPS_16, 1)
  41   RELOC_NUMBER (R_MIPS_32, 2)           /* In Elf 64: alias R_MIPS_ADD */
  42   RELOC_NUMBER (R_MIPS_REL32, 3)        /* In Elf 64: alias R_MIPS_REL */
  43   RELOC_NUMBER (R_MIPS_26, 4)
  44   RELOC_NUMBER (R_MIPS_HI16, 5)
  45   RELOC_NUMBER (R_MIPS_LO16, 6)
  46   RELOC_NUMBER (R_MIPS_GPREL16, 7)      /* In Elf 64: alias R_MIPS_GPREL */
  47   RELOC_NUMBER (R_MIPS_LITERAL, 8)
  48   RELOC_NUMBER (R_MIPS_GOT16, 9)        /* In Elf 64: alias R_MIPS_GOT */
  49   RELOC_NUMBER (R_MIPS_PC16, 10)
  50   RELOC_NUMBER (R_MIPS_CALL16, 11)      /* In Elf 64: alias R_MIPS_CALL */
  51   RELOC_NUMBER (R_MIPS_GPREL32, 12)
  52   /* The remaining relocs are defined on Irix, although they are not
  53      in the MIPS ELF ABI.  */
  54   RELOC_NUMBER (R_MIPS_UNUSED1, 13)
  55   RELOC_NUMBER (R_MIPS_UNUSED2, 14)
  56   RELOC_NUMBER (R_MIPS_UNUSED3, 15)
  57   RELOC_NUMBER (R_MIPS_SHIFT5, 16)
  58   RELOC_NUMBER (R_MIPS_SHIFT6, 17)
  59   RELOC_NUMBER (R_MIPS_64, 18)
  60   RELOC_NUMBER (R_MIPS_GOT_DISP, 19)
  61   RELOC_NUMBER (R_MIPS_GOT_PAGE, 20)
  62   RELOC_NUMBER (R_MIPS_GOT_OFST, 21)
  63   RELOC_NUMBER (R_MIPS_GOT_HI16, 22)
  64   RELOC_NUMBER (R_MIPS_GOT_LO16, 23)
  65   RELOC_NUMBER (R_MIPS_SUB, 24)
  66   RELOC_NUMBER (R_MIPS_INSERT_A, 25)
  67   RELOC_NUMBER (R_MIPS_INSERT_B, 26)
  68   RELOC_NUMBER (R_MIPS_DELETE, 27)
  69   RELOC_NUMBER (R_MIPS_HIGHER, 28)
  70   RELOC_NUMBER (R_MIPS_HIGHEST, 29)
  71   RELOC_NUMBER (R_MIPS_CALL_HI16, 30)
  72   RELOC_NUMBER (R_MIPS_CALL_LO16, 31)
  73   RELOC_NUMBER (R_MIPS_SCN_DISP, 32)
  74   RELOC_NUMBER (R_MIPS_REL16, 33)
  75   RELOC_NUMBER (R_MIPS_ADD_IMMEDIATE, 34)
  76   RELOC_NUMBER (R_MIPS_PJUMP, 35)
  77   RELOC_NUMBER (R_MIPS_RELGOT, 36)
  78   RELOC_NUMBER (R_MIPS_JALR, 37)
  79   /* TLS relocations.  */
  80   RELOC_NUMBER (R_MIPS_TLS_DTPMOD32, 38)
  81   RELOC_NUMBER (R_MIPS_TLS_DTPREL32, 39)
  82   RELOC_NUMBER (R_MIPS_TLS_DTPMOD64, 40)
  83   RELOC_NUMBER (R_MIPS_TLS_DTPREL64, 41)
  84   RELOC_NUMBER (R_MIPS_TLS_GD, 42)
  85   RELOC_NUMBER (R_MIPS_TLS_LDM, 43)
  86   RELOC_NUMBER (R_MIPS_TLS_DTPREL_HI16, 44)
  87   RELOC_NUMBER (R_MIPS_TLS_DTPREL_LO16, 45)
  88   RELOC_NUMBER (R_MIPS_TLS_GOTTPREL, 46)
  89   RELOC_NUMBER (R_MIPS_TLS_TPREL32, 47)
  90   RELOC_NUMBER (R_MIPS_TLS_TPREL64, 48)
  91   RELOC_NUMBER (R_MIPS_TLS_TPREL_HI16, 49)
  92   RELOC_NUMBER (R_MIPS_TLS_TPREL_LO16, 50)
  93   RELOC_NUMBER (R_MIPS_GLOB_DAT, 51)
  94   /* Space to grow */
  95   RELOC_NUMBER (R_MIPS_PC21_S2, 60)
  96   RELOC_NUMBER (R_MIPS_PC26_S2, 61)
  97   RELOC_NUMBER (R_MIPS_PC18_S3, 62)
  98   RELOC_NUMBER (R_MIPS_PC19_S2, 63)
  99   RELOC_NUMBER (R_MIPS_PCHI16, 64)
 100   RELOC_NUMBER (R_MIPS_PCLO16, 65)
 101   FAKE_RELOC (R_MIPS_max, 66)
 102   /* These relocs are used for the mips16.  */
 103   FAKE_RELOC (R_MIPS16_min, 100)
 104   RELOC_NUMBER (R_MIPS16_26, 100)
 105   RELOC_NUMBER (R_MIPS16_GPREL, 101)
 106   RELOC_NUMBER (R_MIPS16_GOT16, 102)
 107   RELOC_NUMBER (R_MIPS16_CALL16, 103)
 108   RELOC_NUMBER (R_MIPS16_HI16, 104)
 109   RELOC_NUMBER (R_MIPS16_LO16, 105)
 110   RELOC_NUMBER (R_MIPS16_TLS_GD, 106)
 111   RELOC_NUMBER (R_MIPS16_TLS_LDM, 107)
 112   RELOC_NUMBER (R_MIPS16_TLS_DTPREL_HI16, 108)
 113   RELOC_NUMBER (R_MIPS16_TLS_DTPREL_LO16, 109)
 114   RELOC_NUMBER (R_MIPS16_TLS_GOTTPREL, 110)
 115   RELOC_NUMBER (R_MIPS16_TLS_TPREL_HI16, 111)
 116   RELOC_NUMBER (R_MIPS16_TLS_TPREL_LO16, 112)
 117   RELOC_NUMBER (R_MIPS16_PC16_S1, 113)
 118   FAKE_RELOC (R_MIPS16_max, 114)
 119   /* These relocations are specific to VxWorks.  */
 120   RELOC_NUMBER (R_MIPS_COPY, 126)
 121   RELOC_NUMBER (R_MIPS_JUMP_SLOT, 127)
 122
 123   /* These relocations are specific to microMIPS.  */
 124   FAKE_RELOC (R_MICROMIPS_min, 130)
 125   RELOC_NUMBER (R_MICROMIPS_26_S1, 133)
 126   RELOC_NUMBER (R_MICROMIPS_HI16, 134)
 127   RELOC_NUMBER (R_MICROMIPS_LO16, 135)
 128   RELOC_NUMBER (R_MICROMIPS_GPREL16, 136)       /* In Elf 64:
 129                                                    alias R_MICROMIPS_GPREL */
 130   RELOC_NUMBER (R_MICROMIPS_LITERAL, 137)
 131   RELOC_NUMBER (R_MICROMIPS_GOT16, 138)         /* In Elf 64:
 132                                                    alias R_MICROMIPS_GOT */
 133   RELOC_NUMBER (R_MICROMIPS_PC7_S1, 139)
 134   RELOC_NUMBER (R_MICROMIPS_PC10_S1, 140)
 135   RELOC_NUMBER (R_MICROMIPS_PC16_S1, 141)
 136   RELOC_NUMBER (R_MICROMIPS_CALL16, 142)        /* In Elf 64:
 137                                                    alias R_MICROMIPS_CALL */
 138   RELOC_NUMBER (R_MICROMIPS_GOT_DISP, 145)
 139   RELOC_NUMBER (R_MICROMIPS_GOT_PAGE, 146)
 140   RELOC_NUMBER (R_MICROMIPS_GOT_OFST, 147)
 141   RELOC_NUMBER (R_MICROMIPS_GOT_HI16, 148)
 142   RELOC_NUMBER (R_MICROMIPS_GOT_LO16, 149)
 143   RELOC_NUMBER (R_MICROMIPS_SUB, 150)
 144   RELOC_NUMBER (R_MICROMIPS_HIGHER, 151)
 145   RELOC_NUMBER (R_MICROMIPS_HIGHEST, 152)
 146   RELOC_NUMBER (R_MICROMIPS_CALL_HI16, 153)
 147   RELOC_NUMBER (R_MICROMIPS_CALL_LO16, 154)
 148   RELOC_NUMBER (R_MICROMIPS_SCN_DISP, 155)
 149   RELOC_NUMBER (R_MICROMIPS_JALR, 156)
 150   RELOC_NUMBER (R_MICROMIPS_HI0_LO16, 157)
 151   /* TLS relocations.  */
 152   RELOC_NUMBER (R_MICROMIPS_TLS_GD, 162)
 153   RELOC_NUMBER (R_MICROMIPS_TLS_LDM, 163)
 154   RELOC_NUMBER (R_MICROMIPS_TLS_DTPREL_HI16, 164)
 155   RELOC_NUMBER (R_MICROMIPS_TLS_DTPREL_LO16, 165)
 156   RELOC_NUMBER (R_MICROMIPS_TLS_GOTTPREL, 166)
 157   RELOC_NUMBER (R_MICROMIPS_TLS_TPREL_HI16, 169)
 158   RELOC_NUMBER (R_MICROMIPS_TLS_TPREL_LO16, 170)
 159   /* microMIPS GP- and PC-relative relocations. */
 160   RELOC_NUMBER (R_MICROMIPS_GPREL7_S2, 172)
 161   RELOC_NUMBER (R_MICROMIPS_PC23_S2, 173)
 162   FAKE_RELOC (R_MICROMIPS_max, 174)
 163
 164   /* This was a GNU extension used by embedded-PIC.  It was co-opted by
 165      mips-linux for exception-handling data.  GCC stopped using it in
 166      May, 2004, then started using it again for compact unwind tables.  */
 167   RELOC_NUMBER (R_MIPS_PC32, 248)
 168   RELOC_NUMBER (R_MIPS_EH, 249)
 169   /* FIXME: this relocation is used internally by gas.  */
 170   RELOC_NUMBER (R_MIPS_GNU_REL16_S2, 250)
 171   /* These are GNU extensions to enable C++ vtable garbage collection.  */
 172   RELOC_NUMBER (R_MIPS_GNU_VTINHERIT, 253)
 173   RELOC_NUMBER (R_MIPS_GNU_VTENTRY, 254)
 174 END_RELOC_NUMBERS (R_MIPS_maxext)
 175
 176 /* Processor specific flags for the ELF header e_flags field.  */
 177
 178 /* At least one .noreorder directive appears in the source.  */
 179 #define EF_MIPS_NOREORDER       0x00000001
 180
 181 /* File contains position independent code.  */
 182 #define EF_MIPS_PIC             0x00000002
 183
 184 /* Code in file uses the standard calling sequence for calling
 185    position independent code.  */
 186 #define EF_MIPS_CPIC            0x00000004
 187
 188 /* ???  Unknown flag, set in IRIX 6's BSDdup2.o in libbsd.a.  */
 189 #define EF_MIPS_XGOT            0x00000008
 190
 191 /* Code in file uses UCODE (obsolete) */
 192 #define EF_MIPS_UCODE           0x00000010
 193
 194 /* Code in file uses new ABI (-n32 on Irix 6).  */
 195 #define EF_MIPS_ABI2            0x00000020
 196
 197 /* Process the .MIPS.options section first by ld */
 198 #define EF_MIPS_OPTIONS_FIRST   0x00000080
 199
 200 /* Indicates code compiled for a 64-bit machine in 32-bit mode
 201    (regs are 32-bits wide).  */
 202 #define EF_MIPS_32BITMODE       0x00000100
 203
 204 /* 32-bit machine but FP registers are 64 bit (-mfp64).  */
 205 #define EF_MIPS_FP64            0x00000200
 206
 207 /* Code in file uses the IEEE 754-2008 NaN encoding convention.  */
 208 #define EF_MIPS_NAN2008         0x00000400
 209
 210 /* Architectural Extensions used by this file */
 211 #define EF_MIPS_ARCH_ASE        0x0f000000
 212
 213 /* Use MDMX multimedia extensions */
 214 #define EF_MIPS_ARCH_ASE_MDMX   0x08000000
 215
 216 /* Use MIPS-16 ISA extensions */
 217 #define EF_MIPS_ARCH_ASE_M16    0x04000000
 218
 219 /* Use MICROMIPS ISA extensions.  */
 220 #define EF_MIPS_ARCH_ASE_MICROMIPS      0x02000000
 221
 222 /* Four bit MIPS architecture field.  */
 223 #define EF_MIPS_ARCH            0xf0000000
 224
 225 /* -mips1 code.  */
 226 #define EF_MIPS_ARCH_1          0x00000000
 227
 228 /* -mips2 code.  */
 229 #define EF_MIPS_ARCH_2          0x10000000
 230
 231 /* -mips3 code.  */
 232 #define EF_MIPS_ARCH_3          0x20000000
 233
 234 /* -mips4 code.  */
 235 #define EF_MIPS_ARCH_4          0x30000000
 236
 237 /* -mips5 code.  */
 238 #define EF_MIPS_ARCH_5           0x40000000
 239
 240 /* -mips32 code.  */
 241 #define EF_MIPS_ARCH_32          0x50000000
 242
 243 /* -mips64 code.  */
 244 #define EF_MIPS_ARCH_64          0x60000000
 245
 246 /* -mips32r2 code.  */
 247 #define EF_MIPS_ARCH_32R2        0x70000000
 248
 249 /* -mips64r2 code.  */
 250 #define EF_MIPS_ARCH_64R2        0x80000000
 251
 252 /* -mips32r6 code.  */
 253 #define EF_MIPS_ARCH_32R6        0x90000000
 254
 255 /* -mips64r6 code.  */
 256 #define EF_MIPS_ARCH_64R6        0xa0000000
 257
 258 /* The ABI of the file.  Also see EF_MIPS_ABI2 above. */
 259 #define EF_MIPS_ABI             0x0000F000
 260
 261 /* The original o32 abi. */
 262 #define EF_MIPS_ABI_O32          0x00001000
 263
 264 /* O32 extended to work on 64 bit architectures */
 265 #define EF_MIPS_ABI_O64          0x00002000
 266
 267 /* EABI in 32 bit mode */
 268 #define EF_MIPS_ABI_EABI32       0x00003000
 269
 270 /* EABI in 64 bit mode */
 271 #define EF_MIPS_ABI_EABI64       0x00004000
 272
 273 /* In order to support backwards compatibility we also
 274    define the old versions of some of these constants.  */
 275 #define E_MIPS_ARCH_1     EF_MIPS_ARCH_1
 276 #define E_MIPS_ARCH_2     EF_MIPS_ARCH_2
 277 #define E_MIPS_ARCH_3     EF_MIPS_ARCH_3
 278 #define E_MIPS_ARCH_4     EF_MIPS_ARCH_4
 279 #define E_MIPS_ARCH_5     EF_MIPS_ARCH_5
 280 #define E_MIPS_ARCH_32    EF_MIPS_ARCH_32
 281 #define E_MIPS_ARCH_64    EF_MIPS_ARCH_64
 282 #define E_MIPS_ARCH_32R2  EF_MIPS_ARCH_32R2
 283 #define E_MIPS_ARCH_64R2  EF_MIPS_ARCH_64R2
 284 #define E_MIPS_ARCH_32R6  EF_MIPS_ARCH_32R6
 285 #define E_MIPS_ARCH_64R6  EF_MIPS_ARCH_64R6
 286 #define E_MIPS_ABI_O32    EF_MIPS_ABI_O32
 287 #define E_MIPS_ABI_O64    EF_MIPS_ABI_O64
 288 #define E_MIPS_ABI_EABI32 EF_MIPS_ABI_EABI32
 289 #define E_MIPS_ABI_EABI64 EF_MIPS_ABI_EABI64
 290
 291
 292 /* Machine variant if we know it.  This field was invented at Cygnus,
 293    but it is hoped that other vendors will adopt it.  If some standard
 294    is developed, this code should be changed to follow it. */
 295
 296 #define EF_MIPS_MACH            0x00FF0000
 297
 298 /* Cygnus is choosing values between 80 and 9F;
 299    00 - 7F should be left for a future standard;
 300    the rest are open. */
 301
 302 #define EF_MIPS_MACH_3900       0x00810000
 303 #define EF_MIPS_MACH_4010       0x00820000
 304 #define EF_MIPS_MACH_4100       0x00830000
 305 #define EF_MIPS_MACH_ALLEGREX   0x00840000
 306 #define EF_MIPS_MACH_4650       0x00850000
 307 #define EF_MIPS_MACH_4120       0x00870000
 308 #define EF_MIPS_MACH_4111       0x00880000
 309 #define EF_MIPS_MACH_SB1         0x008a0000
 310 #define EF_MIPS_MACH_OCTEON     0x008b0000
 311 #define EF_MIPS_MACH_XLR        0x008c0000
 312 #define EF_MIPS_MACH_OCTEON2    0x008d0000
 313 #define EF_MIPS_MACH_OCTEON3    0x008e0000
 314 #define EF_MIPS_MACH_5400       0x00910000
 315 #define EF_MIPS_MACH_5900       0x00920000
 316 #define EF_MIPS_MACH_IAMR2      0x00930000
 317 #define EF_MIPS_MACH_5500       0x00980000
 318 #define EF_MIPS_MACH_9000       0x00990000
 319 #define EF_MIPS_MACH_LS2E        0x00A00000
 320 #define EF_MIPS_MACH_LS2F        0x00A10000
 321 #define EF_MIPS_MACH_GS464       0x00A20000
 322 #define EF_MIPS_MACH_GS464E     0x00A30000
 323 #define EF_MIPS_MACH_GS264E     0x00A40000
 324
 325 /* In order to support backwards compatibility we also
 326    define the old versions of some of these constants.  */
 327 #define E_MIPS_MACH_3900      EF_MIPS_MACH_3900
 328 #define E_MIPS_MACH_4010      EF_MIPS_MACH_4010
 329 #define E_MIPS_MACH_4100      EF_MIPS_MACH_4100
 330 #define E_MIPS_MACH_ALLEGREX  EF_MIPS_MACH_ALLEGREX
 331 #define E_MIPS_MACH_4650      EF_MIPS_MACH_4650
 332 #define E_MIPS_MACH_4120      EF_MIPS_MACH_4120
 333 #define E_MIPS_MACH_4111      EF_MIPS_MACH_4111
 334 #define E_MIPS_MACH_SB1       EF_MIPS_MACH_SB1
 335 #define E_MIPS_MACH_OCTEON    EF_MIPS_MACH_OCTEON
 336 #define E_MIPS_MACH_XLR       EF_MIPS_MACH_XLR
 337 #define E_MIPS_MACH_OCTEON2   EF_MIPS_MACH_OCTEON2
 338 #define E_MIPS_MACH_OCTEON3   EF_MIPS_MACH_OCTEON3
 339 #define E_MIPS_MACH_5400      EF_MIPS_MACH_5400
 340 #define E_MIPS_MACH_5900      EF_MIPS_MACH_5900
 341 #define E_MIPS_MACH_IAMR2     EF_MIPS_MACH_IAMR2
 342 #define E_MIPS_MACH_5500      EF_MIPS_MACH_5500
 343 #define E_MIPS_MACH_9000      EF_MIPS_MACH_9000
 344 #define E_MIPS_MACH_LS2E      EF_MIPS_MACH_LS2E
 345 #define E_MIPS_MACH_LS2F      EF_MIPS_MACH_LS2F
 346 #define E_MIPS_MACH_GS464     EF_MIPS_MACH_GS464
 347 #define E_MIPS_MACH_GS464E    EF_MIPS_MACH_GS464E
 348 #define E_MIPS_MACH_GS264E    EF_MIPS_MACH_GS264E
 349
 350 /* Processor specific section indices.  These sections do not actually
 351    exist.  Symbols with a st_shndx field corresponding to one of these
 352    values have a special meaning.  */
 353
 354 /* Defined and allocated common symbol.  Value is virtual address.  If
 355    relocated, alignment must be preserved.  */
 356 #define SHN_MIPS_ACOMMON        SHN_LORESERVE
 357
 358 /* Defined and allocated text symbol.  Value is virtual address.
 359    Occur in the dynamic symbol table of Alpha OSF/1 and Irix 5 executables.  */
 360 #define SHN_MIPS_TEXT           (SHN_LORESERVE + 1)
 361
 362 /* Defined and allocated data symbol.  Value is virtual address.
 363    Occur in the dynamic symbol table of Alpha OSF/1 and Irix 5 executables.  */
 364 #define SHN_MIPS_DATA           (SHN_LORESERVE + 2)
 365
 366 /* Small common symbol.  */
 367 #define SHN_MIPS_SCOMMON        (SHN_LORESERVE + 3)
 368
 369 /* Small undefined symbol.  */
 370 #define SHN_MIPS_SUNDEFINED     (SHN_LORESERVE + 4)
 371 \f
 372 /* Processor specific section types.  */
 373
 374 /* Section contains the set of dynamic shared objects used when
 375    statically linking.  */
 376 #define SHT_MIPS_LIBLIST        0x70000000
 377
 378 /* I'm not sure what this is, but it's used on Irix 5.  */
 379 #define SHT_MIPS_MSYM           0x70000001
 380
 381 /* Section contains list of symbols whose definitions conflict with
 382    symbols defined in shared objects.  */
 383 #define SHT_MIPS_CONFLICT       0x70000002
 384
 385 /* Section contains the global pointer table.  */
 386 #define SHT_MIPS_GPTAB          0x70000003
 387
 388 /* Section contains microcode information.  The exact format is
 389    unspecified.  */
 390 #define SHT_MIPS_UCODE          0x70000004
 391
 392 /* Section contains some sort of debugging information.  The exact
 393    format is unspecified.  It's probably ECOFF symbols.  */
 394 #define SHT_MIPS_DEBUG          0x70000005
 395
 396 /* Section contains register usage information.  */
 397 #define SHT_MIPS_REGINFO        0x70000006
 398
 399 /* ??? */
 400 #define SHT_MIPS_PACKAGE        0x70000007
 401
 402 /* ??? */
 403 #define SHT_MIPS_PACKSYM        0x70000008
 404
 405 /* ??? */
 406 #define SHT_MIPS_RELD           0x70000009
 407
 408 /* Section contains interface information.  */
 409 #define SHT_MIPS_IFACE          0x7000000b
 410
 411 /* Section contains description of contents of another section.  */
 412 #define SHT_MIPS_CONTENT        0x7000000c
 413
 414 /* Section contains miscellaneous options.  */
 415 #define SHT_MIPS_OPTIONS        0x7000000d
 416
 417 /* ??? */
 418 #define SHT_MIPS_SHDR           0x70000010
 419
 420 /* ??? */
 421 #define SHT_MIPS_FDESC          0x70000011
 422
 423 /* ??? */
 424 #define SHT_MIPS_EXTSYM         0x70000012
 425
 426 /* ??? */
 427 #define SHT_MIPS_DENSE          0x70000013
 428
 429 /* ??? */
 430 #define SHT_MIPS_PDESC          0x70000014
 431
 432 /* ??? */
 433 #define SHT_MIPS_LOCSYM         0x70000015
 434
 435 /* ??? */
 436 #define SHT_MIPS_AUXSYM         0x70000016
 437
 438 /* ??? */
 439 #define SHT_MIPS_OPTSYM         0x70000017
 440
 441 /* ??? */
 442 #define SHT_MIPS_LOCSTR         0x70000018
 443
 444 /* ??? */
 445 #define SHT_MIPS_LINE           0x70000019
 446
 447 /* ??? */
 448 #define SHT_MIPS_RFDESC         0x7000001a
 449
 450 /* Delta C++: symbol table */
 451 #define SHT_MIPS_DELTASYM       0x7000001b
 452
 453 /* Delta C++: instance table */
 454 #define SHT_MIPS_DELTAINST      0x7000001c
 455
 456 /* Delta C++: class table */
 457 #define SHT_MIPS_DELTACLASS     0x7000001d
 458
 459 /* DWARF debugging section.  */
 460 #define SHT_MIPS_DWARF          0x7000001e
 461
 462 /* Delta C++: declarations */
 463 #define SHT_MIPS_DELTADECL      0x7000001f
 464
 465 /* List of libraries the binary depends on.  Includes a time stamp, version
 466    number.  */
 467 #define SHT_MIPS_SYMBOL_LIB     0x70000020
 468
 469 /* Events section.  */
 470 #define SHT_MIPS_EVENTS         0x70000021
 471
 472 /* ??? */
 473 #define SHT_MIPS_TRANSLATE      0x70000022
 474
 475 /* Special pixie sections */
 476 #define SHT_MIPS_PIXIE          0x70000023
 477
 478 /* Address translation table (for debug info) */
 479 #define SHT_MIPS_XLATE          0x70000024
 480
 481 /* SGI internal address translation table (for debug info) */
 482 #define SHT_MIPS_XLATE_DEBUG    0x70000025
 483
 484 /* Intermediate code */
 485 #define SHT_MIPS_WHIRL          0x70000026
 486
 487 /* C++ exception handling region info */
 488 #define SHT_MIPS_EH_REGION      0x70000027
 489
 490 /* Obsolete address translation table (for debug info) */
 491 #define SHT_MIPS_XLATE_OLD      0x70000028
 492
 493 /* Runtime procedure descriptor table exception information (ucode) ??? */
 494 #define SHT_MIPS_PDR_EXCEPTION  0x70000029
 495
 496 /* ABI related flags section.  */
 497 #define SHT_MIPS_ABIFLAGS       0x7000002a
 498
 499 /* GNU style symbol hash table with xlat.  */
 500 #define SHT_MIPS_XHASH          0x7000002b
 501
 502 /* A section of type SHT_MIPS_LIBLIST contains an array of the
 503    following structure.  The sh_link field is the section index of the
 504    string table.  The sh_info field is the number of entries in the
 505    section.  */
 506 typedef struct
 507 {
 508   /* String table index for name of shared object.  */
 509   unsigned long l_name;
 510   /* Time stamp.  */
 511   unsigned long l_time_stamp;
 512   /* Checksum of symbol names and common sizes.  */
 513   unsigned long l_checksum;
 514   /* String table index for version.  */
 515   unsigned long l_version;
 516   /* Flags.  */
 517   unsigned long l_flags;
 518 } Elf32_Lib;
 519
 520 /* The external version of Elf32_Lib.  */
 521 typedef struct
 522 {
 523   unsigned char l_name[4];
 524   unsigned char l_time_stamp[4];
 525   unsigned char l_checksum[4];
 526   unsigned char l_version[4];
 527   unsigned char l_flags[4];
 528 } Elf32_External_Lib;
 529
 530 /* The l_flags field of an Elf32_Lib structure may contain the
 531    following flags.  */
 532
 533 /* Require an exact match at runtime.  */
 534 #define LL_EXACT_MATCH          0x00000001
 535
 536 /* Ignore version incompatibilities at runtime.  */
 537 #define LL_IGNORE_INT_VER       0x00000002
 538
 539 /* Require matching minor version number.  */
 540 #define LL_REQUIRE_MINOR        0x00000004
 541
 542 /* ??? */
 543 #define LL_EXPORTS              0x00000008
 544
 545 /* Delay loading of this library until really needed.  */
 546 #define LL_DELAY_LOAD           0x00000010
 547
 548 /* ??? Delta C++ stuff ??? */
 549 #define LL_DELTA                0x00000020
 550
 551
 552 /* A section of type SHT_MIPS_CONFLICT is an array of indices into the
 553    .dynsym section.  Each element has the following type.  */
 554 typedef unsigned long Elf32_Conflict;
 555 typedef unsigned char Elf32_External_Conflict[4];
 556
 557 typedef unsigned long Elf64_Conflict;
 558 typedef unsigned char Elf64_External_Conflict[8];
 559
 560 /* A section of type SHT_MIPS_GPTAB contains information about how
 561    much GP space would be required for different -G arguments.  This
 562    information is only used so that the linker can provide informative
 563    suggestions as to the best -G value to use.  The sh_info field is
 564    the index of the section for which this information applies.  The
 565    contents of the section are an array of the following union.  The
 566    first element uses the gt_header field.  The remaining elements use
 567    the gt_entry field.  */
 568 typedef union
 569 {
 570   struct
 571     {
 572       /* -G value actually used for this object file.  */
 573       unsigned long gt_current_g_value;
 574       /* Unused.  */
 575       unsigned long gt_unused;
 576     } gt_header;
 577   struct
 578     {
 579       /* If this -G argument has been used...  */
 580       unsigned long gt_g_value;
 581       /* ...this many GP section bytes would be required.  */
 582       unsigned long gt_bytes;
 583     } gt_entry;
 584 } Elf32_gptab;
 585
 586 /* The external version of Elf32_gptab.  */
 587
 588 typedef union
 589 {
 590   struct
 591     {
 592       unsigned char gt_current_g_value[4];
 593       unsigned char gt_unused[4];
 594     } gt_header;
 595   struct
 596     {
 597       unsigned char gt_g_value[4];
 598       unsigned char gt_bytes[4];
 599     } gt_entry;
 600 } Elf32_External_gptab;
 601
 602 /* A section of type SHT_MIPS_REGINFO contains the following
 603    structure.  */
 604 typedef struct
 605 {
 606   /* Mask of general purpose registers used.  */
 607   uint32_t ri_gprmask;
 608   /* Mask of co-processor registers used.  */
 609   uint32_t ri_cprmask[4];
 610   /* GP register value for this object file.  */
 611   uint32_t ri_gp_value;
 612 } Elf32_RegInfo;
 613
 614 /* The external version of the Elf_RegInfo structure.  */
 615 typedef struct
 616 {
 617   unsigned char ri_gprmask[4];
 618   unsigned char ri_cprmask[4][4];
 619   unsigned char ri_gp_value[4];
 620 } Elf32_External_RegInfo;
 621
 622 /* MIPS ELF .reginfo swapping routines.  */
 623 extern void bfd_mips_elf32_swap_reginfo_in
 624   (bfd *, const Elf32_External_RegInfo *, Elf32_RegInfo *);
 625 extern void bfd_mips_elf32_swap_reginfo_out
 626   (bfd *, const Elf32_RegInfo *, Elf32_External_RegInfo *);
 627 \f
 628 /* Processor specific section flags.  */
 629
 630 /* This section must be in the global data area.  */
 631 #define SHF_MIPS_GPREL          0x10000000
 632
 633 /* This section should be merged.  */
 634 #define SHF_MIPS_MERGE          0x20000000
 635
 636 /* This section contains address data of size implied by section
 637    element size.  */
 638 #define SHF_MIPS_ADDR           0x40000000
 639
 640 /* This section contains string data.  */
 641 #define SHF_MIPS_STRING         0x80000000
 642
 643 /* This section may not be stripped.  */
 644 #define SHF_MIPS_NOSTRIP        0x08000000
 645
 646 /* This section is local to threads.  */
 647 #define SHF_MIPS_LOCAL          0x04000000
 648
 649 /* Linker should generate implicit weak names for this section.  */
 650 #define SHF_MIPS_NAMES          0x02000000
 651
 652 /* Section contais text/data which may be replicated in other sections.
 653    Linker should retain only one copy.  */
 654 #define SHF_MIPS_NODUPES        0x01000000
 655 \f
 656 /* Processor specific program header types.  */
 657
 658 /* Register usage information.  Identifies one .reginfo section.  */
 659 #define PT_MIPS_REGINFO         0x70000000
 660
 661 /* Runtime procedure table.  */
 662 #define PT_MIPS_RTPROC          0x70000001
 663
 664 /* .MIPS.options section.  */
 665 #define PT_MIPS_OPTIONS         0x70000002
 666
 667 /* Records ABI related flags.  */
 668 #define PT_MIPS_ABIFLAGS        0x70000003
 669 \f
 670 /* Processor specific dynamic array tags.  */
 671
 672 /* 32 bit version number for runtime linker interface.  */
 673 #define DT_MIPS_RLD_VERSION     0x70000001
 674
 675 /* Time stamp.  */
 676 #define DT_MIPS_TIME_STAMP      0x70000002
 677
 678 /* Checksum of external strings and common sizes.  */
 679 #define DT_MIPS_ICHECKSUM       0x70000003
 680
 681 /* Index of version string in string table.  */
 682 #define DT_MIPS_IVERSION        0x70000004
 683
 684 /* 32 bits of flags.  */
 685 #define DT_MIPS_FLAGS           0x70000005
 686
 687 /* Base address of the segment.  */
 688 #define DT_MIPS_BASE_ADDRESS    0x70000006
 689
 690 /* ??? */
 691 #define DT_MIPS_MSYM            0x70000007
 692
 693 /* Address of .conflict section.  */
 694 #define DT_MIPS_CONFLICT        0x70000008
 695
 696 /* Address of .liblist section.  */
 697 #define DT_MIPS_LIBLIST         0x70000009
 698
 699 /* Number of local global offset table entries.  */
 700 #define DT_MIPS_LOCAL_GOTNO     0x7000000a
 701
 702 /* Number of entries in the .conflict section.  */
 703 #define DT_MIPS_CONFLICTNO      0x7000000b
 704
 705 /* Number of entries in the .liblist section.  */
 706 #define DT_MIPS_LIBLISTNO       0x70000010
 707
 708 /* Number of entries in the .dynsym section.  */
 709 #define DT_MIPS_SYMTABNO        0x70000011
 710
 711 /* Index of first external dynamic symbol not referenced locally.  */
 712 #define DT_MIPS_UNREFEXTNO      0x70000012
 713
 714 /* Index of first dynamic symbol in global offset table.  */
 715 #define DT_MIPS_GOTSYM          0x70000013
 716
 717 /* Number of page table entries in global offset table.  */
 718 #define DT_MIPS_HIPAGENO        0x70000014
 719
 720 /* Address of run time loader map, used for debugging.  */
 721 #define DT_MIPS_RLD_MAP         0x70000016
 722
 723 /* Delta C++ class definition.  */
 724 #define DT_MIPS_DELTA_CLASS     0x70000017
 725
 726 /* Number of entries in DT_MIPS_DELTA_CLASS.  */
 727 #define DT_MIPS_DELTA_CLASS_NO  0x70000018
 728
 729 /* Delta C++ class instances.  */
 730 #define DT_MIPS_DELTA_INSTANCE  0x70000019
 731
 732 /* Number of entries in DT_MIPS_DELTA_INSTANCE.  */
 733 #define DT_MIPS_DELTA_INSTANCE_NO       0x7000001a
 734
 735 /* Delta relocations.  */
 736 #define DT_MIPS_DELTA_RELOC     0x7000001b
 737
 738 /* Number of entries in DT_MIPS_DELTA_RELOC.  */
 739 #define DT_MIPS_DELTA_RELOC_NO  0x7000001c
 740
 741 /* Delta symbols that Delta relocations refer to.  */
 742 #define DT_MIPS_DELTA_SYM       0x7000001d
 743
 744 /* Number of entries in DT_MIPS_DELTA_SYM.  */
 745 #define DT_MIPS_DELTA_SYM_NO    0x7000001e
 746
 747 /* Delta symbols that hold class declarations.  */
 748 #define DT_MIPS_DELTA_CLASSSYM  0x70000020
 749
 750 /* Number of entries in DT_MIPS_DELTA_CLASSSYM.  */
 751 #define DT_MIPS_DELTA_CLASSSYM_NO       0x70000021
 752
 753 /* Flags indicating information about C++ flavor.  */
 754 #define DT_MIPS_CXX_FLAGS       0x70000022
 755
 756 /* Pixie information (???).  */
 757 #define DT_MIPS_PIXIE_INIT      0x70000023
 758
 759 /* Address of .MIPS.symlib */
 760 #define DT_MIPS_SYMBOL_LIB      0x70000024
 761
 762 /* The GOT index of the first PTE for a segment */
 763 #define DT_MIPS_LOCALPAGE_GOTIDX        0x70000025
 764
 765 /* The GOT index of the first PTE for a local symbol */
 766 #define DT_MIPS_LOCAL_GOTIDX    0x70000026
 767
 768 /* The GOT index of the first PTE for a hidden symbol */
 769 #define DT_MIPS_HIDDEN_GOTIDX   0x70000027
 770
 771 /* The GOT index of the first PTE for a protected symbol */
 772 #define DT_MIPS_PROTECTED_GOTIDX        0x70000028
 773
 774 /* Address of `.MIPS.options'.  */
 775 #define DT_MIPS_OPTIONS         0x70000029
 776
 777 /* Address of `.interface'.  */
 778 #define DT_MIPS_INTERFACE       0x7000002a
 779
 780 /* ??? */
 781 #define DT_MIPS_DYNSTR_ALIGN    0x7000002b
 782
 783 /* Size of the .interface section.  */
 784 #define DT_MIPS_INTERFACE_SIZE  0x7000002c
 785
 786 /* Size of rld_text_resolve function stored in the GOT.  */
 787 #define DT_MIPS_RLD_TEXT_RESOLVE_ADDR   0x7000002d
 788
 789 /* Default suffix of DSO to be added by rld on dlopen() calls.  */
 790 #define DT_MIPS_PERF_SUFFIX     0x7000002e
 791
 792 /* Size of compact relocation section (O32).  */
 793 #define DT_MIPS_COMPACT_SIZE    0x7000002f
 794
 795 /* GP value for auxiliary GOTs.  */
 796 #define DT_MIPS_GP_VALUE        0x70000030
 797
 798 /* Address of auxiliary .dynamic.  */
 799 #define DT_MIPS_AUX_DYNAMIC     0x70000031
 800
 801 /* Address of the base of the PLTGOT.  */
 802 #define DT_MIPS_PLTGOT         0x70000032
 803
 804 /* Points to the base of a writable PLT.  */
 805 #define DT_MIPS_RWPLT          0x70000034
 806
 807 /* Relative offset of run time loader map, used for debugging.  */
 808 #define DT_MIPS_RLD_MAP_REL    0x70000035
 809
 810 /* Address of .MIPS.xhash section.  */
 811 #define DT_MIPS_XHASH          0x70000036
 812 \f
 813 /* Flags which may appear in a DT_MIPS_FLAGS entry.  */
 814
 815 /* No flags.  */
 816 #define RHF_NONE                0x00000000
 817
 818 /* Uses shortcut pointers.  */
 819 #define RHF_QUICKSTART          0x00000001
 820
 821 /* Hash size is not a power of two.  */
 822 #define RHF_NOTPOT              0x00000002
 823
 824 /* Ignore LD_LIBRARY_PATH.  */
 825 #define RHS_NO_LIBRARY_REPLACEMENT 0x00000004
 826
 827 /* DSO address may not be relocated. */
 828 #define RHF_NO_MOVE             0x00000008
 829
 830 /* SGI specific features. */
 831 #define RHF_SGI_ONLY            0x00000010
 832
 833 /* Guarantee that .init will finish executing before any non-init
 834    code in DSO is called. */
 835 #define RHF_GUARANTEE_INIT         0x00000020
 836
 837 /* Contains Delta C++ code. */
 838 #define RHF_DELTA_C_PLUS_PLUS      0x00000040
 839
 840 /* Guarantee that .init will start executing before any non-init
 841    code in DSO is called. */
 842 #define RHF_GUARANTEE_START_INIT   0x00000080
 843
 844 /* Generated by pixie. */
 845 #define RHF_PIXIE                  0x00000100
 846
 847 /* Delay-load DSO by default. */
 848 #define RHF_DEFAULT_DELAY_LOAD     0x00000200
 849
 850 /* Object may be requickstarted */
 851 #define RHF_REQUICKSTART           0x00000400
 852
 853 /* Object has been requickstarted */
 854 #define RHF_REQUICKSTARTED         0x00000800
 855
 856 /* Generated by cord. */
 857 #define RHF_CORD                   0x00001000
 858
 859 /* Object contains no unresolved undef symbols. */
 860 #define RHF_NO_UNRES_UNDEF         0x00002000
 861
 862 /* Symbol table is in a safe order. */
 863 #define RHF_RLD_ORDER_SAFE         0x00004000
 864 \f
 865 /* Special values for the st_other field in the symbol table.  These
 866    are used in an Irix 5 dynamic symbol table.  */
 867
 868 #define STO_DEFAULT             STV_DEFAULT
 869 #define STO_INTERNAL            STV_INTERNAL
 870 #define STO_HIDDEN              STV_HIDDEN
 871 #define STO_PROTECTED           STV_PROTECTED
 872
 873 /* Two topmost bits denote the MIPS ISA for .text symbols:
 874    + 00 -- standard MIPS code,
 875    + 10 -- microMIPS code,
 876    + 11 -- MIPS16 code; requires the following two bits to be set too.
 877    Note that one of the MIPS16 bits overlaps with STO_MIPS_PIC.  See below
 878    for details.  */
 879 #define STO_MIPS_ISA            (3 << 6)
 880
 881 /* The mask spanning the rest of MIPS psABI flags.  At most one is expected
 882    to be set except for STO_MIPS16.  */
 883 #define STO_MIPS_FLAGS          (~(STO_MIPS_ISA | ELF_ST_VISIBILITY (-1)))
 884
 885 /* The MIPS psABI was updated in 2008 with support for PLTs and copy
 886    relocs.  There are therefore two types of nonzero SHN_UNDEF functions:
 887    PLT entries and traditional MIPS lazy binding stubs.  We mark the former
 888    with STO_MIPS_PLT to distinguish them from the latter.  */
 889 #define STO_MIPS_PLT            0x8
 890 #define ELF_ST_IS_MIPS_PLT(other)                                       \
 891   ((ELF_ST_IS_MIPS16 (other)                                            \
 892     ? ((other) & (~STO_MIPS16 & STO_MIPS_FLAGS))                        \
 893     : ((other) & STO_MIPS_FLAGS)) == STO_MIPS_PLT)
 894 #define ELF_ST_SET_MIPS_PLT(other)                                      \
 895   ((ELF_ST_IS_MIPS16 (other)                                            \
 896     ? ((other) & (STO_MIPS16 | ~STO_MIPS_FLAGS))                        \
 897     : ((other) & ~STO_MIPS_FLAGS)) | STO_MIPS_PLT)
 898
 899 /* This value is used to mark PIC functions in an object that mixes
 900    PIC and non-PIC.  Note that this bit overlaps with STO_MIPS16,
 901    although MIPS16 symbols are never considered to be MIPS_PIC.  */
 902 #define STO_MIPS_PIC            0x20
 903 #define ELF_ST_IS_MIPS_PIC(other) (((other) & STO_MIPS_FLAGS) == STO_MIPS_PIC)
 904 #define ELF_ST_SET_MIPS_PIC(other)                                      \
 905   ((ELF_ST_IS_MIPS16 (other)                                            \
 906     ? ((other) & ~(STO_MIPS16 | STO_MIPS_FLAGS))                        \
 907     : ((other) & ~STO_MIPS_FLAGS)) | STO_MIPS_PIC)
 908
 909 /* This value is used for a mips16 .text symbol.  */
 910 #define STO_MIPS16              0xf0
 911 #define ELF_ST_IS_MIPS16(other) (((other) & STO_MIPS16) == STO_MIPS16)
 912 #define ELF_ST_SET_MIPS16(other) ((other) | STO_MIPS16)
 913
 914 /* This value is used for a microMIPS .text symbol.  To distinguish from
 915    STO_MIPS16, we set top two bits to be 10 to denote STO_MICROMIPS.  The
 916    mask is STO_MIPS_ISA.  */
 917 #define STO_MICROMIPS           (2 << 6)
 918 #define ELF_ST_IS_MICROMIPS(other) (((other) & STO_MIPS_ISA) == STO_MICROMIPS)
 919 #define ELF_ST_SET_MICROMIPS(other) (((other) & ~STO_MIPS_ISA) | STO_MICROMIPS)
 920
 921 /* Whether code compression (either of the MIPS16 or the microMIPS ASEs)
 922    has been indicated for a .text symbol.  */
 923 #define ELF_ST_IS_COMPRESSED(other) \
 924   (ELF_ST_IS_MIPS16 (other) || ELF_ST_IS_MICROMIPS (other))
 925
 926 /* This bit is used on Irix to indicate a symbol whose definition
 927    is optional - if, at final link time, it cannot be found, no
 928    error message should be produced.  */
 929 #define STO_OPTIONAL            (1 << 2)
 930 /* A macro to examine the STO_OPTIONAL bit.  */
 931 #define ELF_MIPS_IS_OPTIONAL(other)     ((other) & STO_OPTIONAL)
 932 \f
 933 /* The 64-bit MIPS ELF ABI uses an unusual reloc format.  Each
 934    relocation entry specifies up to three actual relocations, all at
 935    the same address.  The first relocation which required a symbol
 936    uses the symbol in the r_sym field.  The second relocation which
 937    requires a symbol uses the symbol in the r_ssym field.  If all
 938    three relocations require a symbol, the third one uses a zero
 939    value.  */
 940
 941 /* An entry in a 64 bit SHT_REL section.  */
 942
 943 typedef struct
 944 {
 945   /* Address of relocation.  */
 946   unsigned char r_offset[8];
 947   /* Symbol index.  */
 948   unsigned char r_sym[4];
 949   /* Special symbol.  */
 950   unsigned char r_ssym[1];
 951   /* Third relocation.  */
 952   unsigned char r_type3[1];
 953   /* Second relocation.  */
 954   unsigned char r_type2[1];
 955   /* First relocation.  */
 956   unsigned char r_type[1];
 957 } Elf64_Mips_External_Rel;
 958
 959 typedef struct
 960 {
 961   /* Address of relocation.  */
 962   bfd_vma r_offset;
 963   /* Symbol index.  */
 964   unsigned long r_sym;
 965   /* Special symbol.  */
 966   unsigned char r_ssym;
 967   /* Third relocation.  */
 968   unsigned char r_type3;
 969   /* Second relocation.  */
 970   unsigned char r_type2;
 971   /* First relocation.  */
 972   unsigned char r_type;
 973 } Elf64_Mips_Internal_Rel;
 974
 975 /* An entry in a 64 bit SHT_RELA section.  */
 976
 977 typedef struct
 978 {
 979   /* Address of relocation.  */
 980   unsigned char r_offset[8];
 981   /* Symbol index.  */
 982   unsigned char r_sym[4];
 983   /* Special symbol.  */
 984   unsigned char r_ssym[1];
 985   /* Third relocation.  */
 986   unsigned char r_type3[1];
 987   /* Second relocation.  */
 988   unsigned char r_type2[1];
 989   /* First relocation.  */
 990   unsigned char r_type[1];
 991   /* Addend.  */
 992   unsigned char r_addend[8];
 993 } Elf64_Mips_External_Rela;
 994
 995 typedef struct
 996 {
 997   /* Address of relocation.  */
 998   bfd_vma r_offset;
 999   /* Symbol index.  */
1000   unsigned long r_sym;
1001   /* Special symbol.  */
1002   unsigned char r_ssym;
1003   /* Third relocation.  */
1004   unsigned char r_type3;
1005   /* Second relocation.  */
1006   unsigned char r_type2;
1007   /* First relocation.  */
1008   unsigned char r_type;
1009   /* Addend.  */
1010   bfd_signed_vma r_addend;
1011 } Elf64_Mips_Internal_Rela;
1012
1013 /* MIPS ELF 64 relocation info access macros.  */
1014 #define ELF64_MIPS_R_SSYM(i) (((i) >> 24) & 0xff)
1015 #define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff)
1016 #define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff)
1017 #define ELF64_MIPS_R_TYPE(i) ((i) & 0xff)
1018
1019 /* Values found in the r_ssym field of a relocation entry.  */
1020
1021 /* No relocation.  */
1022 #define RSS_UNDEF       0
1023
1024 /* Value of GP.  */
1025 #define RSS_GP          1
1026
1027 /* Value of GP in object being relocated.  */
1028 #define RSS_GP0         2
1029
1030 /* Address of location being relocated.  */
1031 #define RSS_LOC         3
1032 \f
1033 /* A SHT_MIPS_OPTIONS section contains a series of options, each of
1034    which starts with this header.  */
1035
1036 typedef struct
1037 {
1038   /* Type of option.  */
1039   unsigned char kind[1];
1040   /* Size of option descriptor, including header.  */
1041   unsigned char size[1];
1042   /* Section index of affected section, or 0 for global option.  */
1043   unsigned char section[2];
1044   /* Information specific to this kind of option.  */
1045   unsigned char info[4];
1046 } Elf_External_Options;
1047
1048 typedef struct
1049 {
1050   /* Type of option.  */
1051   unsigned char kind;
1052   /* Size of option descriptor, including header.  */
1053   unsigned char size;
1054   /* Section index of affected section, or 0 for global option.  */
1055   uint16_t section;
1056   /* Information specific to this kind of option.  */
1057   uint32_t info;
1058 } Elf_Internal_Options;
1059
1060 /* MIPS ELF option header swapping routines.  */
1061 extern void bfd_mips_elf_swap_options_in
1062   (bfd *, const Elf_External_Options *, Elf_Internal_Options *);
1063 extern void bfd_mips_elf_swap_options_out
1064   (bfd *, const Elf_Internal_Options *, Elf_External_Options *);
1065
1066 /* Values which may appear in the kind field of an Elf_Options
1067    structure.  */
1068
1069 /* Undefined.  */
1070 #define ODK_NULL        0
1071
1072 /* Register usage and GP value.  */
1073 #define ODK_REGINFO     1
1074
1075 /* Exception processing information.  */
1076 #define ODK_EXCEPTIONS  2
1077
1078 /* Section padding information.  */
1079 #define ODK_PAD         3
1080
1081 /* Hardware workarounds performed.  */
1082 #define ODK_HWPATCH     4
1083
1084 /* Fill value used by the linker.  */
1085 #define ODK_FILL        5
1086
1087 /* Reserved space for desktop tools.  */
1088 #define ODK_TAGS        6
1089
1090 /* Hardware workarounds, AND bits when merging.  */
1091 #define ODK_HWAND       7
1092
1093 /* Hardware workarounds, OR bits when merging.  */
1094 #define ODK_HWOR        8
1095
1096 /* GP group to use for text/data sections.  */
1097 #define ODK_GP_GROUP    9
1098
1099 /* ID information.  */
1100 #define ODK_IDENT       10
1101
1102 /* In the 32 bit ABI, an ODK_REGINFO option is just a Elf32_RegInfo
1103    structure.  In the 64 bit ABI, it is the following structure.  The
1104    info field of the options header is not used.  */
1105
1106 typedef struct
1107 {
1108   /* Mask of general purpose registers used.  */
1109   unsigned char ri_gprmask[4];
1110   /* Padding.  */
1111   unsigned char ri_pad[4];
1112   /* Mask of co-processor registers used.  */
1113   unsigned char ri_cprmask[4][4];
1114   /* GP register value for this object file.  */
1115   unsigned char ri_gp_value[8];
1116 } Elf64_External_RegInfo;
1117
1118 typedef struct
1119 {
1120   /* Mask of general purpose registers used.  */
1121   uint32_t ri_gprmask;
1122   /* Padding.  */
1123   uint32_t ri_pad;
1124   /* Mask of co-processor registers used.  */
1125   uint32_t ri_cprmask[4];
1126   /* GP register value for this object file.  */
1127   uint64_t ri_gp_value;
1128 } Elf64_Internal_RegInfo;
1129
1130 /* ABI Flags structure version 0.  */
1131
1132 typedef struct
1133 {
1134   /* Version of flags structure.  */
1135   unsigned char version[2];
1136   /* The level of the ISA: 1-5, 32, 64.  */
1137   unsigned char isa_level[1];
1138   /* The revision of ISA: 0 for MIPS V and below, 1-n otherwise.  */
1139   unsigned char isa_rev[1];
1140   /* The size of general purpose registers.  */
1141   unsigned char gpr_size[1];
1142   /* The size of co-processor 1 registers.  */
1143   unsigned char cpr1_size[1];
1144   /* The size of co-processor 2 registers.  */
1145   unsigned char cpr2_size[1];
1146   /* The floating-point ABI.  */
1147   unsigned char fp_abi[1];
1148   /* Processor-specific extension.  */
1149   unsigned char isa_ext[4];
1150   /* Mask of ASEs used.  */
1151   unsigned char ases[4];
1152   /* Mask of general flags.  */
1153   unsigned char flags1[4];
1154   unsigned char flags2[4];
1155 } Elf_External_ABIFlags_v0;
1156
1157 typedef struct elf_internal_abiflags_v0
1158 {
1159   /* Version of flags structure.  */
1160   unsigned short version;
1161   /* The level of the ISA: 1-5, 32, 64.  */
1162   unsigned char isa_level;
1163   /* The revision of ISA: 0 for MIPS V and below, 1-n otherwise.  */
1164   unsigned char isa_rev;
1165   /* The size of general purpose registers.  */
1166   unsigned char gpr_size;
1167   /* The size of co-processor 1 registers.  */
1168   unsigned char cpr1_size;
1169   /* The size of co-processor 2 registers.  */
1170   unsigned char cpr2_size;
1171   /* The floating-point ABI.  */
1172   unsigned char fp_abi;
1173   /* Processor-specific extension.  */
1174   unsigned long isa_ext;
1175   /* Mask of ASEs used.  */
1176   unsigned long ases;
1177   /* Mask of general flags.  */
1178   unsigned long flags1;
1179   unsigned long flags2;
1180 } Elf_Internal_ABIFlags_v0;
1181
1182 typedef struct
1183 {
1184   /* The hash value computed from the name of the corresponding
1185      dynamic symbol.  */
1186   unsigned char ms_hash_value[4];
1187   /* Contains both the dynamic relocation index and the symbol flags
1188      field.  The macros ELF32_MS_REL_INDEX and ELF32_MS_FLAGS are used
1189      to access the individual values.  The dynamic relocation index
1190      identifies the first entry in the .rel.dyn section that
1191      references the dynamic symbol corresponding to this msym entry.
1192      If the index is 0, no dynamic relocations are associated with the
1193      symbol.  The symbol flags field is reserved for future use.  */
1194   unsigned char ms_info[4];
1195 } Elf32_External_Msym;
1196
1197 typedef struct
1198 {
1199   /* The hash value computed from the name of the corresponding
1200      dynamic symbol.  */
1201   unsigned long ms_hash_value;
1202   /* Contains both the dynamic relocation index and the symbol flags
1203      field.  The macros ELF32_MS_REL_INDEX and ELF32_MS_FLAGS are used
1204      to access the individual values.  The dynamic relocation index
1205      identifies the first entry in the .rel.dyn section that
1206      references the dynamic symbol corresponding to this msym entry.
1207      If the index is 0, no dynamic relocations are associated with the
1208      symbol.  The symbol flags field is reserved for future use.  */
1209   unsigned long ms_info;
1210 } Elf32_Internal_Msym;
1211
1212 #define ELF32_MS_REL_INDEX(i) ((i) >> 8)
1213 #define ELF32_MS_FLAGS(i)     (i) & 0xff)
1214 #define ELF32_MS_INFO(r, f)   (((r) << 8) + ((f) & 0xff))
1215
1216 /* MIPS ELF reginfo swapping routines.  */
1217 extern void bfd_mips_elf64_swap_reginfo_in
1218   (bfd *, const Elf64_External_RegInfo *, Elf64_Internal_RegInfo *);
1219 extern void bfd_mips_elf64_swap_reginfo_out
1220   (bfd *, const Elf64_Internal_RegInfo *, Elf64_External_RegInfo *);
1221
1222 /* MIPS ELF flags swapping routines.  */
1223 extern void bfd_mips_elf_swap_abiflags_v0_in
1224   (bfd *, const Elf_External_ABIFlags_v0 *, Elf_Internal_ABIFlags_v0 *);
1225 extern void bfd_mips_elf_swap_abiflags_v0_out
1226   (bfd *, const Elf_Internal_ABIFlags_v0 *, Elf_External_ABIFlags_v0 *);
1227
1228 /* Masks for the info work of an ODK_EXCEPTIONS descriptor.  */
1229 #define OEX_FPU_MIN     0x1f    /* FPEs which must be enabled.  */
1230 #define OEX_FPU_MAX     0x1f00  /* FPEs which may be enabled.  */
1231 #define OEX_PAGE0       0x10000 /* Page zero must be mapped.  */
1232 #define OEX_SMM         0x20000 /* Force sequential memory mode.  */
1233 #define OEX_FPDBUG      0x40000 /* Force precise floating-point
1234                                    exceptions (debug mode).  */
1235 #define OEX_DISMISS     0x80000 /* Dismiss invalid address faults.  */
1236
1237 /* Masks of the FP exceptions for OEX_FPU_MIN and OEX_FPU_MAX.  */
1238 #define OEX_FPU_INVAL   0x10    /* Invalid operation exception.  */
1239 #define OEX_FPU_DIV0    0x08    /* Division by zero exception.  */
1240 #define OEX_FPU_OFLO    0x04    /* Overflow exception.  */
1241 #define OEX_FPU_UFLO    0x02    /* Underflow exception.  */
1242 #define OEX_FPU_INEX    0x01    /* Inexact exception.  */
1243
1244 /* Masks for the info word of an ODK_PAD descriptor.  */
1245 #define OPAD_PREFIX     0x01
1246 #define OPAD_POSTFIX    0x02
1247 #define OPAD_SYMBOL     0x04
1248
1249 /* Masks for the info word of an ODK_HWPATCH descriptor.  */
1250 #define OHW_R4KEOP      0x00000001      /* R4000 end-of-page patch.  */
1251 #define OHW_R8KPFETCH   0x00000002      /* May need R8000 prefetch patch.  */
1252 #define OHW_R5KEOP      0x00000004      /* R5000 end-of-page patch.  */
1253 #define OHW_R5KCVTL     0x00000008      /* R5000 cvt.[ds].l bug
1254                                            (clean == 1).  */
1255 #define OHW_R10KLDL     0x00000010      /* Needs R10K misaligned
1256                                            load patch. */
1257
1258 /* Masks for the info word of an ODK_IDENT/ODK_GP_GROUP descriptor.  */
1259 #define OGP_GROUP       0x0000ffff      /* GP group number.  */
1260 #define OGP_SELF        0xffff0000      /* Self-contained GP groups.  */
1261
1262 /* Masks for the info word of an ODK_HWAND/ODK_HWOR descriptor.  */
1263 #define OHWA0_R4KEOP_CHECKED    0x00000001
1264 #define OHWA0_R4KEOP_CLEAN      0x00000002
1265
1266 /* Values for the xxx_size bytes of an ABI flags structure.  */
1267
1268 #define AFL_REG_NONE         0x00       /* No registers.  */
1269 #define AFL_REG_32           0x01       /* 32-bit registers.  */
1270 #define AFL_REG_64           0x02       /* 64-bit registers.  */
1271 #define AFL_REG_128          0x03       /* 128-bit registers.  */
1272
1273 /* Masks for the ases word of an ABI flags structure.  */
1274
1275 #define AFL_ASE_DSP          0x00000001 /* DSP ASE.  */
1276 #define AFL_ASE_DSPR2        0x00000002 /* DSP R2 ASE.  */
1277 #define AFL_ASE_EVA          0x00000004 /* Enhanced VA Scheme.  */
1278 #define AFL_ASE_MCU          0x00000008 /* MCU (MicroController) ASE.  */
1279 #define AFL_ASE_MDMX         0x00000010 /* MDMX ASE.  */
1280 #define AFL_ASE_MIPS3D       0x00000020 /* MIPS-3D ASE.  */
1281 #define AFL_ASE_MT           0x00000040 /* MT ASE.  */
1282 #define AFL_ASE_SMARTMIPS    0x00000080 /* SmartMIPS ASE.  */
1283 #define AFL_ASE_VIRT         0x00000100 /* VZ ASE.  */
1284 #define AFL_ASE_MSA          0x00000200 /* MSA ASE.  */
1285 #define AFL_ASE_MIPS16       0x00000400 /* MIPS16 ASE.  */
1286 #define AFL_ASE_MICROMIPS    0x00000800 /* MICROMIPS ASE.  */
1287 #define AFL_ASE_XPA          0x00001000 /* XPA ASE.  */
1288 #define AFL_ASE_DSPR3        0x00002000 /* DSP R3 ASE.  */
1289 #define AFL_ASE_MIPS16E2     0x00004000 /* MIPS16e2 ASE.  */
1290 #define AFL_ASE_CRC          0x00008000 /* CRC ASE.  */
1291 #define AFL_ASE_RESERVED1    0x00010000 /* Reserved by MIPS Tech for WIP.  */
1292 #define AFL_ASE_GINV         0x00020000 /* GINV ASE.  */
1293 #define AFL_ASE_LOONGSON_MMI 0x00040000 /* Loongson MMI ASE.  */
1294 #define AFL_ASE_LOONGSON_CAM 0x00080000 /* Loongson CAM ASE.  */
1295 #define AFL_ASE_LOONGSON_EXT 0x00100000 /* Loongson EXT instructions.  */
1296 #define AFL_ASE_LOONGSON_EXT2 0x00200000 /* Loongson EXT2 instructions.  */
1297 #define AFL_ASE_MASK         0x003effff /* All ASEs.  */
1298
1299 /* Values for the isa_ext word of an ABI flags structure.  */
1300
1301 #define AFL_EXT_XLR           1  /* RMI Xlr instruction.  */
1302 #define AFL_EXT_OCTEON2       2  /* Cavium Networks Octeon2.  */
1303 #define AFL_EXT_OCTEONP       3  /* Cavium Networks OcteonP.  */
1304 #define AFL_EXT_OCTEON        5  /* Cavium Networks Octeon.  */
1305 #define AFL_EXT_5900          6  /* MIPS R5900 instruction.  */
1306 #define AFL_EXT_4650          7  /* MIPS R4650 instruction.  */
1307 #define AFL_EXT_4010          8  /* LSI R4010 instruction.  */
1308 #define AFL_EXT_4100          9  /* NEC VR4100 instruction.  */
1309 #define AFL_EXT_3900         10  /* Toshiba R3900 instruction.  */
1310 #define AFL_EXT_10000        11  /* MIPS R10000 instruction.  */
1311 #define AFL_EXT_SB1          12  /* Broadcom SB-1 instruction.  */
1312 #define AFL_EXT_4111         13  /* NEC VR4111/VR4181 instruction.  */
1313 #define AFL_EXT_4120         14  /* NEC VR4120 instruction.  */
1314 #define AFL_EXT_5400         15  /* NEC VR5400 instruction.  */
1315 #define AFL_EXT_5500         16  /* NEC VR5500 instruction.  */
1316 #define AFL_EXT_LOONGSON_2E  17  /* ST Microelectronics Loongson 2E.  */
1317 #define AFL_EXT_LOONGSON_2F  18  /* ST Microelectronics Loongson 2F.  */
1318 #define AFL_EXT_OCTEON3      19  /* Cavium Networks Octeon3.  */
1319 #define AFL_EXT_INTERAPTIV_MR2 20  /* Imagination interAptiv MR2.  */
1320
1321 /* Masks for the flags1 word of an ABI flags structure.  */
1322 #define AFL_FLAGS1_ODDSPREG   1  /* Uses odd single-precision registers.  */
1323
1324 extern unsigned int bfd_mips_isa_ext (bfd *);
1325 \f
1326
1327 /* Object attribute tags.  */
1328 enum
1329 {
1330   /* 0-3 are generic.  */
1331
1332   /* Floating-point ABI used by this object file.  */
1333   Tag_GNU_MIPS_ABI_FP = 4,
1334
1335   /* MSA ABI used by this object file.  */
1336   Tag_GNU_MIPS_ABI_MSA = 8,
1337 };
1338
1339 /* Object attribute values.  */
1340 enum
1341 {
1342   /* Values defined for Tag_GNU_MIPS_ABI_FP.  */
1343
1344   /* Not tagged or not using any ABIs affected by the differences.  */
1345   Val_GNU_MIPS_ABI_FP_ANY = 0,
1346
1347   /* Using hard-float -mdouble-float.  */
1348   Val_GNU_MIPS_ABI_FP_DOUBLE = 1,
1349
1350   /* Using hard-float -msingle-float.  */
1351   Val_GNU_MIPS_ABI_FP_SINGLE = 2,
1352
1353   /* Using soft-float.  */
1354   Val_GNU_MIPS_ABI_FP_SOFT = 3,
1355
1356   /* Using -mips32r2 -mfp64.  */
1357   Val_GNU_MIPS_ABI_FP_OLD_64 = 4,
1358
1359   /* Using -mfpxx */
1360   Val_GNU_MIPS_ABI_FP_XX = 5,
1361
1362   /* Using -mips32r2 -mfp64.  */
1363   Val_GNU_MIPS_ABI_FP_64 = 6,
1364
1365   /* Using -mips32r2 -mfp64 -mno-odd-spreg.  */
1366   Val_GNU_MIPS_ABI_FP_64A = 7,
1367
1368   /* This is reserved for backward-compatibility with an earlier
1369      implementation of the MIPS NaN2008 functionality.  */
1370   Val_GNU_MIPS_ABI_FP_NAN2008 = 8,
1371
1372   /* Values defined for Tag_GNU_MIPS_ABI_MSA.  */
1373
1374   /* Not tagged or not using any ABIs affected by the differences.  */
1375   Val_GNU_MIPS_ABI_MSA_ANY = 0,
1376
1377   /* Using 128-bit MSA.  */
1378   Val_GNU_MIPS_ABI_MSA_128 = 1,
1379 };
1380
1381 #ifdef __cplusplus
1382 }
1383 #endif
1384
1385 #endif /* _ELF_MIPS_H */