1 /* RISC-V ELF support for BFD. 2 Copyright 2011-2014 Free Software Foundation, Inc. 3 4 Contributed by Andrw Waterman <waterman@cs.berkeley.edu> at UC Berkeley. 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; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24 /* This file holds definitions specific to the RISCV ELF ABI. Note 25 that most of this is not actually implemented by BFD. */ 26 27 #ifndef _ELF_RISCV_H 28 #define _ELF_RISCV_H 29 30 #include "elf/reloc-macros.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 48 /* Relocation types not used by the dynamic linker. */ 49 RELOC_NUMBER (R_RISCV_BRANCH, 16) 50 RELOC_NUMBER (R_RISCV_JAL, 17) 51 RELOC_NUMBER (R_RISCV_CALL, 18) 52 RELOC_NUMBER (R_RISCV_CALL_PLT, 19) 53 RELOC_NUMBER (R_RISCV_GOT_HI20, 20) 54 RELOC_NUMBER (R_RISCV_TLS_GOT_HI20, 21) 55 RELOC_NUMBER (R_RISCV_TLS_GD_HI20, 22) 56 RELOC_NUMBER (R_RISCV_PCREL_HI20, 23) 57 RELOC_NUMBER (R_RISCV_PCREL_LO12_I, 24) 58 RELOC_NUMBER (R_RISCV_PCREL_LO12_S, 25) 59 RELOC_NUMBER (R_RISCV_HI20, 26) 60 RELOC_NUMBER (R_RISCV_LO12_I, 27) 61 RELOC_NUMBER (R_RISCV_LO12_S, 28) 62 RELOC_NUMBER (R_RISCV_TPREL_HI20, 29) 63 RELOC_NUMBER (R_RISCV_TPREL_LO12_I, 30) 64 RELOC_NUMBER (R_RISCV_TPREL_LO12_S, 31) 65 RELOC_NUMBER (R_RISCV_TPREL_ADD, 32) 66 RELOC_NUMBER (R_RISCV_ADD8, 33) 67 RELOC_NUMBER (R_RISCV_ADD16, 34) 68 RELOC_NUMBER (R_RISCV_ADD32, 35) 69 RELOC_NUMBER (R_RISCV_ADD64, 36) 70 RELOC_NUMBER (R_RISCV_SUB8, 37) 71 RELOC_NUMBER (R_RISCV_SUB16, 38) 72 RELOC_NUMBER (R_RISCV_SUB32, 39) 73 RELOC_NUMBER (R_RISCV_SUB64, 40) 74 RELOC_NUMBER (R_RISCV_GNU_VTINHERIT, 41) 75 RELOC_NUMBER (R_RISCV_GNU_VTENTRY, 42) 76 RELOC_NUMBER (R_RISCV_ALIGN, 43) 77 END_RELOC_NUMBERS (R_RISCV_max) 78 79 /* Processor specific flags for the ELF header e_flags field. */ 80 81 /* Custom flag definitions. */ 82 83 #define EF_RISCV_EXT_MASK 0xffff 84 #define EF_RISCV_EXT_SH 16 85 #define E_RISCV_EXT_Xcustom 0x0000 86 #define E_RISCV_EXT_Xhwacha 0x0001 87 #define E_RISCV_EXT_RESERVED 0xffff 88 89 #define EF_GET_RISCV_EXT(x) \ 90 ((x >> EF_RISCV_EXT_SH) & EF_RISCV_EXT_MASK) 91 92 #define EF_SET_RISCV_EXT(x, ext) \ 93 do { x |= ((ext & EF_RISCV_EXT_MASK) << EF_RISCV_EXT_SH); } while (0) 94 95 #define EF_IS_RISCV_EXT_Xcustom(x) \ 96 (EF_GET_RISCV_EXT(x) == E_RISCV_EXT_Xcustom) 97 98 /* A mapping from extension names to elf flags */ 99 100 struct riscv_extension_entry 101 { 102 const char* name; 103 unsigned int flag; 104 }; 105 106 static const struct riscv_extension_entry riscv_extension_map[] = 107 { 108 {"Xcustom", E_RISCV_EXT_Xcustom}, 109 {"Xhwacha", E_RISCV_EXT_Xhwacha}, 110 }; 111 112 /* Given an extension name, return an elf flag. */ 113 114 static inline const char* riscv_elf_flag_to_name(unsigned int flag) 115 { 116 unsigned int i; 117 118 for (i=0; i<sizeof(riscv_extension_map)/sizeof(riscv_extension_map[0]); i++) 119 if (riscv_extension_map[i].flag == flag) 120 return riscv_extension_map[i].name; 121 122 return NULL; 123 } 124 125 /* Given an elf flag, return an extension name. */ 126 127 static inline unsigned int riscv_elf_name_to_flag(const char* name) 128 { 129 unsigned int i; 130 131 for (i=0; i<sizeof(riscv_extension_map)/sizeof(riscv_extension_map[0]); i++) 132 if (strcmp(riscv_extension_map[i].name, name) == 0) 133 return riscv_extension_map[i].flag; 134 135 return E_RISCV_EXT_Xcustom; 136 } 137 138 #endif /* _ELF_RISCV_H */ 139