include/elf/riscv.h

   1 /* RISC-V ELF support for BFD.
   2    Copyright (C) 2011-2024 Free Software Foundation, Inc.
   3
   4    Contributed by Andrew Waterman (andrew@sifive.com).
   5    Based on MIPS ELF support for BFD, by Ian Lance Taylor.
   6
   7    This file is part of BFD, the Binary File Descriptor library.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; see the file COPYING3. If not,
  21    see <http://www.gnu.org/licenses/>.  */
  22
  23 /* This file holds definitions specific to the RISCV ELF ABI.  Note
  24    that most of this is not actually implemented by BFD.  */
  25
  26 #ifndef _ELF_RISCV_H
  27 #define _ELF_RISCV_H
  28
  29 #include "elf/reloc-macros.h"
  30 #include "libiberty.h"
  31
  32 /* Relocation types.  */
  33 START_RELOC_NUMBERS (elf_riscv_reloc_type)
  34   /* Relocation types used by the dynamic linker.  */
  35   RELOC_NUMBER (R_RISCV_NONE, 0)
  36   RELOC_NUMBER (R_RISCV_32, 1)
  37   RELOC_NUMBER (R_RISCV_64, 2)
  38   RELOC_NUMBER (R_RISCV_RELATIVE, 3)
  39   RELOC_NUMBER (R_RISCV_COPY, 4)
  40   RELOC_NUMBER (R_RISCV_JUMP_SLOT, 5)
  41   RELOC_NUMBER (R_RISCV_TLS_DTPMOD32, 6)
  42   RELOC_NUMBER (R_RISCV_TLS_DTPMOD64, 7)
  43   RELOC_NUMBER (R_RISCV_TLS_DTPREL32, 8)
  44   RELOC_NUMBER (R_RISCV_TLS_DTPREL64, 9)
  45   RELOC_NUMBER (R_RISCV_TLS_TPREL32, 10)
  46   RELOC_NUMBER (R_RISCV_TLS_TPREL64, 11)
  47   RELOC_NUMBER (R_RISCV_TLSDESC, 12)
  48
  49   /* Relocation types not used by the dynamic linker.  */
  50   RELOC_NUMBER (R_RISCV_BRANCH, 16)
  51   RELOC_NUMBER (R_RISCV_JAL, 17)
  52   RELOC_NUMBER (R_RISCV_CALL, 18)
  53   RELOC_NUMBER (R_RISCV_CALL_PLT, 19)
  54   RELOC_NUMBER (R_RISCV_GOT_HI20, 20)
  55   RELOC_NUMBER (R_RISCV_TLS_GOT_HI20, 21)
  56   RELOC_NUMBER (R_RISCV_TLS_GD_HI20, 22)
  57   RELOC_NUMBER (R_RISCV_PCREL_HI20, 23)
  58   RELOC_NUMBER (R_RISCV_PCREL_LO12_I, 24)
  59   RELOC_NUMBER (R_RISCV_PCREL_LO12_S, 25)
  60   RELOC_NUMBER (R_RISCV_HI20, 26)
  61   RELOC_NUMBER (R_RISCV_LO12_I, 27)
  62   RELOC_NUMBER (R_RISCV_LO12_S, 28)
  63   RELOC_NUMBER (R_RISCV_TPREL_HI20, 29)
  64   RELOC_NUMBER (R_RISCV_TPREL_LO12_I, 30)
  65   RELOC_NUMBER (R_RISCV_TPREL_LO12_S, 31)
  66   RELOC_NUMBER (R_RISCV_TPREL_ADD, 32)
  67   RELOC_NUMBER (R_RISCV_ADD8, 33)
  68   RELOC_NUMBER (R_RISCV_ADD16, 34)
  69   RELOC_NUMBER (R_RISCV_ADD32, 35)
  70   RELOC_NUMBER (R_RISCV_ADD64, 36)
  71   RELOC_NUMBER (R_RISCV_SUB8, 37)
  72   RELOC_NUMBER (R_RISCV_SUB16, 38)
  73   RELOC_NUMBER (R_RISCV_SUB32, 39)
  74   RELOC_NUMBER (R_RISCV_SUB64, 40)
  75   RELOC_NUMBER (R_RISCV_ALIGN, 43)
  76   RELOC_NUMBER (R_RISCV_RVC_BRANCH, 44)
  77   RELOC_NUMBER (R_RISCV_RVC_JUMP, 45)
  78   RELOC_NUMBER (R_RISCV_RVC_LUI, 46)
  79   RELOC_NUMBER (R_RISCV_GPREL_I, 47)
  80   RELOC_NUMBER (R_RISCV_GPREL_S, 48)
  81   RELOC_NUMBER (R_RISCV_TPREL_I, 49)
  82   RELOC_NUMBER (R_RISCV_TPREL_S, 50)
  83   RELOC_NUMBER (R_RISCV_RELAX, 51)
  84   RELOC_NUMBER (R_RISCV_SUB6, 52)
  85   RELOC_NUMBER (R_RISCV_SET6, 53)
  86   RELOC_NUMBER (R_RISCV_SET8, 54)
  87   RELOC_NUMBER (R_RISCV_SET16, 55)
  88   RELOC_NUMBER (R_RISCV_SET32, 56)
  89   RELOC_NUMBER (R_RISCV_32_PCREL, 57)
  90   RELOC_NUMBER (R_RISCV_IRELATIVE, 58)
  91   /* Reserved 59 for R_RISCV_PLT32.  */
  92   RELOC_NUMBER (R_RISCV_SET_ULEB128, 60)
  93   RELOC_NUMBER (R_RISCV_SUB_ULEB128, 61)
  94   RELOC_NUMBER (R_RISCV_TLSDESC_HI20, 62)
  95   RELOC_NUMBER (R_RISCV_TLSDESC_LOAD_LO12, 63)
  96   RELOC_NUMBER (R_RISCV_TLSDESC_ADD_LO12, 64)
  97   RELOC_NUMBER (R_RISCV_TLSDESC_CALL, 65)
  98 END_RELOC_NUMBERS (R_RISCV_max)
  99
 100 /* Internal relocations used exclusively by the relaxation pass.  */
 101 #define R_RISCV_DELETE  (R_RISCV_max)
 102 #define R_RISCV_RVC_LUI (R_RISCV_max + 1)
 103 #define R_RISCV_GPREL_I (R_RISCV_max + 2)
 104 #define R_RISCV_GPREL_S (R_RISCV_max + 3)
 105 #define R_RISCV_TPREL_I (R_RISCV_max + 4)
 106 #define R_RISCV_TPREL_S (R_RISCV_max + 5)
 107
 108 /* Processor specific flags for the ELF header e_flags field.  */
 109
 110 /* File may contain compressed instructions.  */
 111 #define EF_RISCV_RVC 0x0001
 112
 113 /* Which floating-point ABI a file uses.  */
 114 #define EF_RISCV_FLOAT_ABI 0x0006
 115
 116 /* File uses the soft-float ABI.  */
 117 #define EF_RISCV_FLOAT_ABI_SOFT 0x0000
 118
 119 /* File uses the single-float ABI.  */
 120 #define EF_RISCV_FLOAT_ABI_SINGLE 0x0002
 121
 122 /* File uses the double-float ABI.  */
 123 #define EF_RISCV_FLOAT_ABI_DOUBLE 0x0004
 124
 125 /* File uses the quad-float ABI.  */
 126 #define EF_RISCV_FLOAT_ABI_QUAD 0x0006
 127
 128 /* File uses the 32E base integer instruction.  */
 129 #define EF_RISCV_RVE 0x0008
 130
 131 /* The name of the global pointer symbol.  */
 132 #define RISCV_GP_SYMBOL "__global_pointer$"
 133
 134 /* Processor specific dynamic array tags.  */
 135 #define DT_RISCV_VARIANT_CC (DT_LOPROC + 1)
 136
 137 /* RISC-V specific values for st_other.  */
 138 #define STO_RISCV_VARIANT_CC 0x80
 139
 140 /* File uses the TSO model. */
 141 #define EF_RISCV_TSO 0x0010
 142
 143 /* Additional section types.  */
 144 #define SHT_RISCV_ATTRIBUTES (SHT_LOPROC + 3) /* Section holds attributes.  */
 145
 146 /* Processor specific program header types.  */
 147
 148 /* Location of RISC-V ELF attribute section. */
 149 #define PT_RISCV_ATTRIBUTES 0x70000003
 150
 151 /* Object attributes.  */
 152 enum
 153 {
 154   /* 0-3 are generic.  */
 155   Tag_RISCV_stack_align = 4,
 156   Tag_RISCV_arch = 5,
 157   Tag_RISCV_unaligned_access = 6,
 158   Tag_RISCV_priv_spec = 8,
 159   Tag_RISCV_priv_spec_minor = 10,
 160   Tag_RISCV_priv_spec_revision = 12
 161 };
 162
 163 #endif /* _ELF_RISCV_H */