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143 lines
4.5 KiB
143 lines
4.5 KiB
/* RISC-V ELF support for BFD.
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Copyright 2011-2014 Free Software Foundation, Inc.
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Contributed by Andrw Waterman <waterman@cs.berkeley.edu> at UC Berkeley.
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Based on MIPS ELF support for BFD, by Ian Lance Taylor.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* This file holds definitions specific to the RISCV ELF ABI. Note
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that most of this is not actually implemented by BFD. */
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#ifndef _ELF_RISCV_H
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#define _ELF_RISCV_H
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#include "elf/reloc-macros.h"
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/* Relocation types. */
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START_RELOC_NUMBERS (elf_riscv_reloc_type)
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/* Relocation types used by the dynamic linker. */
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RELOC_NUMBER (R_RISCV_NONE, 0)
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RELOC_NUMBER (R_RISCV_32, 1)
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RELOC_NUMBER (R_RISCV_64, 2)
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RELOC_NUMBER (R_RISCV_RELATIVE, 3)
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RELOC_NUMBER (R_RISCV_COPY, 4)
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RELOC_NUMBER (R_RISCV_JUMP_SLOT, 5)
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RELOC_NUMBER (R_RISCV_TLS_DTPMOD32, 6)
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RELOC_NUMBER (R_RISCV_TLS_DTPMOD64, 7)
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RELOC_NUMBER (R_RISCV_TLS_DTPREL32, 8)
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RELOC_NUMBER (R_RISCV_TLS_DTPREL64, 9)
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RELOC_NUMBER (R_RISCV_TLS_TPREL32, 10)
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RELOC_NUMBER (R_RISCV_TLS_TPREL64, 11)
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/* Relocation types not used by the dynamic linker. */
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RELOC_NUMBER (R_RISCV_BRANCH, 16)
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RELOC_NUMBER (R_RISCV_JAL, 17)
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RELOC_NUMBER (R_RISCV_CALL, 18)
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RELOC_NUMBER (R_RISCV_CALL_PLT, 19)
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RELOC_NUMBER (R_RISCV_GOT_HI20, 20)
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RELOC_NUMBER (R_RISCV_TLS_GOT_HI20, 21)
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RELOC_NUMBER (R_RISCV_TLS_GD_HI20, 22)
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RELOC_NUMBER (R_RISCV_PCREL_HI20, 23)
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RELOC_NUMBER (R_RISCV_PCREL_LO12_I, 24)
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RELOC_NUMBER (R_RISCV_PCREL_LO12_S, 25)
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RELOC_NUMBER (R_RISCV_HI20, 26)
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RELOC_NUMBER (R_RISCV_LO12_I, 27)
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RELOC_NUMBER (R_RISCV_LO12_S, 28)
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RELOC_NUMBER (R_RISCV_TPREL_HI20, 29)
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RELOC_NUMBER (R_RISCV_TPREL_LO12_I, 30)
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RELOC_NUMBER (R_RISCV_TPREL_LO12_S, 31)
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RELOC_NUMBER (R_RISCV_TPREL_ADD, 32)
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RELOC_NUMBER (R_RISCV_ADD8, 33)
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RELOC_NUMBER (R_RISCV_ADD16, 34)
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RELOC_NUMBER (R_RISCV_ADD32, 35)
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RELOC_NUMBER (R_RISCV_ADD64, 36)
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RELOC_NUMBER (R_RISCV_SUB8, 37)
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RELOC_NUMBER (R_RISCV_SUB16, 38)
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RELOC_NUMBER (R_RISCV_SUB32, 39)
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RELOC_NUMBER (R_RISCV_SUB64, 40)
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RELOC_NUMBER (R_RISCV_GNU_VTINHERIT, 41)
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RELOC_NUMBER (R_RISCV_GNU_VTENTRY, 42)
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RELOC_NUMBER (R_RISCV_ALIGN, 43)
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RELOC_NUMBER (R_RISCV_RVC_BRANCH, 44)
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RELOC_NUMBER (R_RISCV_RVC_JUMP, 45)
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END_RELOC_NUMBERS (R_RISCV_max)
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/* Processor specific flags for the ELF header e_flags field. */
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/* File may contain compressed instructions. */
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#define EF_RISCV_RVC 0x0001
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/* Custom flag definitions. */
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#define EF_RISCV_EXT_MASK 0xffff
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#define EF_RISCV_EXT_SH 16
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#define E_RISCV_EXT_Xcustom 0x0000
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#define E_RISCV_EXT_Xhwacha 0x0001
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#define E_RISCV_EXT_RESERVED 0xffff
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#define EF_GET_RISCV_EXT(x) \
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((x >> EF_RISCV_EXT_SH) & EF_RISCV_EXT_MASK)
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#define EF_SET_RISCV_EXT(x, ext) \
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do { x |= ((ext & EF_RISCV_EXT_MASK) << EF_RISCV_EXT_SH); } while (0)
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#define EF_IS_RISCV_EXT_Xcustom(x) \
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(EF_GET_RISCV_EXT(x) == E_RISCV_EXT_Xcustom)
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/* A mapping from extension names to elf flags */
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struct riscv_extension_entry
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{
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const char* name;
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unsigned int flag;
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};
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static const struct riscv_extension_entry riscv_extension_map[] =
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{
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{"Xcustom", E_RISCV_EXT_Xcustom},
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{"Xhwacha", E_RISCV_EXT_Xhwacha},
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};
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/* Given an extension name, return an elf flag. */
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static inline const char* riscv_elf_flag_to_name(unsigned int flag)
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{
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unsigned int i;
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for (i=0; i<sizeof(riscv_extension_map)/sizeof(riscv_extension_map[0]); i++)
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if (riscv_extension_map[i].flag == flag)
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return riscv_extension_map[i].name;
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return NULL;
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}
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/* Given an elf flag, return an extension name. */
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static inline unsigned int riscv_elf_name_to_flag(const char* name)
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{
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unsigned int i;
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for (i=0; i<sizeof(riscv_extension_map)/sizeof(riscv_extension_map[0]); i++)
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if (strcmp(riscv_extension_map[i].name, name) == 0)
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return riscv_extension_map[i].flag;
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return E_RISCV_EXT_Xcustom;
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}
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#endif /* _ELF_RISCV_H */
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