2016-11-01 17:45:57 +01:00
|
|
|
/* RISC-V ELF support for BFD.
|
2018-01-03 06:17:27 +01:00
|
|
|
Copyright (C) 2011-2018 Free Software Foundation, Inc.
|
2016-11-01 17:45:57 +01:00
|
|
|
|
|
|
|
|
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)
|
|
|
|
|
|
|
|
|
|
/* 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_GNU_VTINHERIT, 41)
|
|
|
|
|
RELOC_NUMBER (R_RISCV_GNU_VTENTRY, 42)
|
|
|
|
|
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)
|
2016-12-19 07:53:48 +01:00
|
|
|
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)
|
2017-06-08 20:54:14 +02:00
|
|
|
RELOC_NUMBER (R_RISCV_32_PCREL, 57)
|
2016-11-01 17:45:57 +01:00
|
|
|
END_RELOC_NUMBERS (R_RISCV_max)
|
|
|
|
|
|
|
|
|
|
/* Processor specific flags for the ELF header e_flags field. */
|
|
|
|
|
|
|
|
|
|
/* File may contain compressed instructions. */
|
|
|
|
|
#define EF_RISCV_RVC 0x0001
|
|
|
|
|
|
Re-work RISC-V gas flags: now we just support -mabi and -march
We've decided to standardize on two flags for RISC-V: "-march" sets the
target architecture (which determines which instructions can be
generated), and "-mabi" sets the target ABI. We needed to rework this
because the old flag set didn't support soft-float or single-float ABIs,
and didn't support an x32-style ABI on RISC-V.
Additionally, we've changed the behavior of the -march flag: it's now a
lot stricter and only parses things we can actually understand.
Additionally, it's now lowercase-only: the rationale is that while the
RISC-V ISA manual specifies that ISA strings are case-insensitive, in
Linux-land things are usually case-sensitive. Since this flag can be
used to determine library paths, we didn't want to bake some
case-insensitivity in there that would case trouble later.
This patch implements these two new flags and removes the old flags that
could conflict with these. There wasn't a RISC-V release before, so we
want to just support a clean flag set.
include/
* elf/riscv.h (EF_RISCV_SOFT_FLOAT): Don't define.
(EF_RISCV_FLOAT_ABI, EF_RISCV_FLOAT_ABI_SOFT): Define.
(EF_RISCV_FLOAT_ABI_SINGLE, EF_RISCV_FLOAT_ABI_DOUBLE): Define.
(EF_RISCV_FLOAT_ABI_QUAD): Define.
bfd/
* elfnn-riscv.c (_bfd_riscv_elf_merge_private_bfd_data): Use
EF_RISCV_FLOAT_ABI_SOFT instead of EF_RISCV_SOFT_FLOAT.
binutils/
* readelf.c (get_machine_flags): Use
EF_RISCV_FLOAT_ABI_{SOFT,SINGLE,DOBULE,QUAD) instead of
EF_RISCV_{SOFT,HARD}_FLOAT.
gas/
* config/tc-riscv.h (xlen): Delete.
* config/tc-riscv.c (xlen): Make static.
(abi_xlen): New variable.
(options): Replace OPTION_{M32,M64,MSOFT_FLOAT,MHARD_FLOAT,MRVC}
with OPTION_MABI.
(md_longopts): Likewise.
(md_parse_option): Likewise.
(riscv_elf_final_processing): Likewise.
* doc/as.texinfo (Target RISC-V options): Likewise.
* doc/c-riscv.texi (OPTIONS): Likewise.
* config/tc-riscv.c (float_mode): Removed.
(float_abi): New type, specifies the floating-point ABI.
(riscv_set_abi): New function.
(riscv_add_subset): Only allow lower-case ISA names and require
them to start with "rv".
(riscv_after_parse_args): Likewise.
opcodes/
* riscv-dis.c (riscv_disassemble_insn): Default to the ELF's
XLEN when none is provided.
2016-12-19 07:53:50 +01:00
|
|
|
/* 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
|
2016-11-01 17:45:57 +01:00
|
|
|
|
2017-04-03 19:08:29 +02:00
|
|
|
/* The name of the global pointer symbol. */
|
|
|
|
|
#define RISCV_GP_SYMBOL "__global_pointer$"
|
|
|
|
|
|
2016-11-01 17:45:57 +01:00
|
|
|
#endif /* _ELF_RISCV_H */
|
