xref: /netbsd-src/external/gpl3/gdb/dist/include/elf/riscv.h (revision 02f41505626a9ceb584d30d0789203495760ac88)

/* RISC-V ELF support for BFD.
   Copyright (C) 2011-2024 Free Software Foundation, Inc.

   Contributed by Andrew Waterman (andrew@sifive.com).
   Based on MIPS ELF support for BFD, by Ian Lance Taylor.

   This file is part of BFD, the Binary File Descriptor library.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; see the file COPYING3. If not,
   see <http://www.gnu.org/licenses/>.  */

/* This file holds definitions specific to the RISCV ELF ABI.  Note
   that most of this is not actually implemented by BFD.  */

#ifndef _ELF_RISCV_H
#define _ELF_RISCV_H

#include "elf/reloc-macros.h"
#include "libiberty.h"

/* Relocation types.  */
START_RELOC_NUMBERS (elf_riscv_reloc_type)
  /* Relocation types used by the dynamic linker.  */
  RELOC_NUMBER (R_RISCV_NONE, 0)
  RELOC_NUMBER (R_RISCV_32, 1)
  RELOC_NUMBER (R_RISCV_64, 2)
  RELOC_NUMBER (R_RISCV_RELATIVE, 3)
  RELOC_NUMBER (R_RISCV_COPY, 4)
  RELOC_NUMBER (R_RISCV_JUMP_SLOT, 5)
  RELOC_NUMBER (R_RISCV_TLS_DTPMOD32, 6)
  RELOC_NUMBER (R_RISCV_TLS_DTPMOD64, 7)
  RELOC_NUMBER (R_RISCV_TLS_DTPREL32, 8)
  RELOC_NUMBER (R_RISCV_TLS_DTPREL64, 9)
  RELOC_NUMBER (R_RISCV_TLS_TPREL32, 10)
  RELOC_NUMBER (R_RISCV_TLS_TPREL64, 11)
  RELOC_NUMBER (R_RISCV_TLSDESC, 12)

  /* Relocation types not used by the dynamic linker.  */
  RELOC_NUMBER (R_RISCV_BRANCH, 16)
  RELOC_NUMBER (R_RISCV_JAL, 17)
  RELOC_NUMBER (R_RISCV_CALL, 18)
  RELOC_NUMBER (R_RISCV_CALL_PLT, 19)
  RELOC_NUMBER (R_RISCV_GOT_HI20, 20)
  RELOC_NUMBER (R_RISCV_TLS_GOT_HI20, 21)
  RELOC_NUMBER (R_RISCV_TLS_GD_HI20, 22)
  RELOC_NUMBER (R_RISCV_PCREL_HI20, 23)
  RELOC_NUMBER (R_RISCV_PCREL_LO12_I, 24)
  RELOC_NUMBER (R_RISCV_PCREL_LO12_S, 25)
  RELOC_NUMBER (R_RISCV_HI20, 26)
  RELOC_NUMBER (R_RISCV_LO12_I, 27)
  RELOC_NUMBER (R_RISCV_LO12_S, 28)
  RELOC_NUMBER (R_RISCV_TPREL_HI20, 29)
  RELOC_NUMBER (R_RISCV_TPREL_LO12_I, 30)
  RELOC_NUMBER (R_RISCV_TPREL_LO12_S, 31)
  RELOC_NUMBER (R_RISCV_TPREL_ADD, 32)
  RELOC_NUMBER (R_RISCV_ADD8, 33)
  RELOC_NUMBER (R_RISCV_ADD16, 34)
  RELOC_NUMBER (R_RISCV_ADD32, 35)
  RELOC_NUMBER (R_RISCV_ADD64, 36)
  RELOC_NUMBER (R_RISCV_SUB8, 37)
  RELOC_NUMBER (R_RISCV_SUB16, 38)
  RELOC_NUMBER (R_RISCV_SUB32, 39)
  RELOC_NUMBER (R_RISCV_SUB64, 40)
  RELOC_NUMBER (R_RISCV_ALIGN, 43)
  RELOC_NUMBER (R_RISCV_RVC_BRANCH, 44)
  RELOC_NUMBER (R_RISCV_RVC_JUMP, 45)
  RELOC_NUMBER (R_RISCV_RVC_LUI, 46)
  RELOC_NUMBER (R_RISCV_GPREL_I, 47)
  RELOC_NUMBER (R_RISCV_GPREL_S, 48)
  RELOC_NUMBER (R_RISCV_TPREL_I, 49)
  RELOC_NUMBER (R_RISCV_TPREL_S, 50)
  RELOC_NUMBER (R_RISCV_RELAX, 51)
  RELOC_NUMBER (R_RISCV_SUB6, 52)
  RELOC_NUMBER (R_RISCV_SET6, 53)
  RELOC_NUMBER (R_RISCV_SET8, 54)
  RELOC_NUMBER (R_RISCV_SET16, 55)
  RELOC_NUMBER (R_RISCV_SET32, 56)
  RELOC_NUMBER (R_RISCV_32_PCREL, 57)
  RELOC_NUMBER (R_RISCV_IRELATIVE, 58)
  /* Reserved 59 for R_RISCV_PLT32.  */
  RELOC_NUMBER (R_RISCV_SET_ULEB128, 60)
  RELOC_NUMBER (R_RISCV_SUB_ULEB128, 61)
  RELOC_NUMBER (R_RISCV_TLSDESC_HI20, 62)
  RELOC_NUMBER (R_RISCV_TLSDESC_LOAD_LO12, 63)
  RELOC_NUMBER (R_RISCV_TLSDESC_ADD_LO12, 64)
  RELOC_NUMBER (R_RISCV_TLSDESC_CALL, 65)
END_RELOC_NUMBERS (R_RISCV_max)

/* Internal relocations used exclusively by the relaxation pass.  */
#define R_RISCV_DELETE  (R_RISCV_max)
#define R_RISCV_RVC_LUI (R_RISCV_max + 1)
#define R_RISCV_GPREL_I (R_RISCV_max + 2)
#define R_RISCV_GPREL_S (R_RISCV_max + 3)
#define R_RISCV_TPREL_I (R_RISCV_max + 4)
#define R_RISCV_TPREL_S (R_RISCV_max + 5)

/* Processor specific flags for the ELF header e_flags field.  */

/* File may contain compressed instructions.  */
#define EF_RISCV_RVC 0x0001

/* Which floating-point ABI a file uses.  */
#define EF_RISCV_FLOAT_ABI 0x0006

/* File uses the soft-float ABI.  */
#define EF_RISCV_FLOAT_ABI_SOFT 0x0000

/* File uses the single-float ABI.  */
#define EF_RISCV_FLOAT_ABI_SINGLE 0x0002

/* File uses the double-float ABI.  */
#define EF_RISCV_FLOAT_ABI_DOUBLE 0x0004

/* File uses the quad-float ABI.  */
#define EF_RISCV_FLOAT_ABI_QUAD 0x0006

/* File uses the 32E base integer instruction.  */
#define EF_RISCV_RVE 0x0008

/* The name of the global pointer symbol.  */
#define RISCV_GP_SYMBOL "__global_pointer$"

/* Processor specific dynamic array tags.  */
#define DT_RISCV_VARIANT_CC (DT_LOPROC + 1)

/* RISC-V specific values for st_other.  */
#define STO_RISCV_VARIANT_CC 0x80

/* File uses the TSO model. */
#define EF_RISCV_TSO 0x0010

/* Additional section types.  */
#define SHT_RISCV_ATTRIBUTES 0x70000003 /* Section holds attributes.  */

/* Processor specific program header types.  */

/* Location of RISC-V ELF attribute section. */
#define PT_RISCV_ATTRIBUTES 0x70000003

/* Object attributes.  */
enum
{
  /* 0-3 are generic.  */
  Tag_RISCV_stack_align = 4,
  Tag_RISCV_arch = 5,
  Tag_RISCV_unaligned_access = 6,
  Tag_RISCV_priv_spec = 8,
  Tag_RISCV_priv_spec_minor = 10,
  Tag_RISCV_priv_spec_revision = 12
};

#endif /* _ELF_RISCV_H */