1706 lines
47 KiB
C
1706 lines
47 KiB
C
/* RISC-V-specific support for ELF.
|
|
Copyright (C) 2011-2020 Free Software Foundation, Inc.
|
|
|
|
Contributed by Andrew Waterman (andrew@sifive.com).
|
|
Based on TILE-Gx and MIPS targets.
|
|
|
|
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/>. */
|
|
|
|
#include "sysdep.h"
|
|
#include "bfd.h"
|
|
#include "libbfd.h"
|
|
#include "elf-bfd.h"
|
|
#include "elf/riscv.h"
|
|
#include "opcode/riscv.h"
|
|
#include "libiberty.h"
|
|
#include "elfxx-riscv.h"
|
|
#include "safe-ctype.h"
|
|
|
|
#define MINUS_ONE ((bfd_vma)0 - 1)
|
|
|
|
/* Special handler for ADD/SUB relocations that allows them to be filled out
|
|
both in the pre-linked and post-linked file. This is necessary to make
|
|
pre-linked debug info work, as due to linker relaxations we need to emit
|
|
relocations for the debug info. */
|
|
static bfd_reloc_status_type riscv_elf_add_sub_reloc
|
|
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
|
|
|
|
/* The relocation table used for SHT_RELA sections. */
|
|
|
|
static reloc_howto_type howto_table[] =
|
|
{
|
|
/* No relocation. */
|
|
HOWTO (R_RISCV_NONE, /* type */
|
|
0, /* rightshift */
|
|
3, /* size */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_NONE", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 32 bit relocation. */
|
|
HOWTO (R_RISCV_32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_32", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 64 bit relocation. */
|
|
HOWTO (R_RISCV_64, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_64", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Relocation against a local symbol in a shared object. */
|
|
HOWTO (R_RISCV_RELATIVE, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_RELATIVE", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_RISCV_COPY, /* type */
|
|
0, /* rightshift */
|
|
0, /* this one is variable size */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_COPY", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_RISCV_JUMP_SLOT, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_JUMP_SLOT", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Dynamic TLS relocations. */
|
|
HOWTO (R_RISCV_TLS_DTPMOD32, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TLS_DTPMOD32", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_RISCV_TLS_DTPMOD64, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TLS_DTPMOD64", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_RISCV_TLS_DTPREL32, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TLS_DTPREL32", /* name */
|
|
TRUE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_RISCV_TLS_DTPREL64, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TLS_DTPREL64", /* name */
|
|
TRUE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_RISCV_TLS_TPREL32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TLS_TPREL32", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_RISCV_TLS_TPREL64, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TLS_TPREL64", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Reserved for future relocs that the dynamic linker must understand. */
|
|
EMPTY_HOWTO (12),
|
|
EMPTY_HOWTO (13),
|
|
EMPTY_HOWTO (14),
|
|
EMPTY_HOWTO (15),
|
|
|
|
/* 12-bit PC-relative branch offset. */
|
|
HOWTO (R_RISCV_BRANCH, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_BRANCH", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_SBTYPE_IMM (-1U), /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* 20-bit PC-relative jump offset. */
|
|
HOWTO (R_RISCV_JAL, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_JAL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_UJTYPE_IMM (-1U), /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* 32-bit PC-relative function call (AUIPC/JALR). */
|
|
HOWTO (R_RISCV_CALL, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
64, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_CALL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_UTYPE_IMM (-1U) | ((bfd_vma) ENCODE_ITYPE_IMM (-1U) << 32),
|
|
/* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* Like R_RISCV_CALL, but not locally binding. */
|
|
HOWTO (R_RISCV_CALL_PLT, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
64, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_CALL_PLT", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_UTYPE_IMM (-1U) | ((bfd_vma) ENCODE_ITYPE_IMM (-1U) << 32),
|
|
/* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* High 20 bits of 32-bit PC-relative GOT access. */
|
|
HOWTO (R_RISCV_GOT_HI20, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_GOT_HI20", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_UTYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* High 20 bits of 32-bit PC-relative TLS IE GOT access. */
|
|
HOWTO (R_RISCV_TLS_GOT_HI20, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TLS_GOT_HI20", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_UTYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* High 20 bits of 32-bit PC-relative TLS GD GOT reference. */
|
|
HOWTO (R_RISCV_TLS_GD_HI20, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TLS_GD_HI20", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_UTYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* High 20 bits of 32-bit PC-relative reference. */
|
|
HOWTO (R_RISCV_PCREL_HI20, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_PCREL_HI20", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_UTYPE_IMM (-1U), /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* Low 12 bits of a 32-bit PC-relative load or add. */
|
|
HOWTO (R_RISCV_PCREL_LO12_I, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_PCREL_LO12_I", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_ITYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Low 12 bits of a 32-bit PC-relative store. */
|
|
HOWTO (R_RISCV_PCREL_LO12_S, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_PCREL_LO12_S", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_STYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* High 20 bits of 32-bit absolute address. */
|
|
HOWTO (R_RISCV_HI20, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_HI20", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_UTYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* High 12 bits of 32-bit load or add. */
|
|
HOWTO (R_RISCV_LO12_I, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_LO12_I", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_ITYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* High 12 bits of 32-bit store. */
|
|
HOWTO (R_RISCV_LO12_S, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_LO12_S", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_STYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* High 20 bits of TLS LE thread pointer offset. */
|
|
HOWTO (R_RISCV_TPREL_HI20, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TPREL_HI20", /* name */
|
|
TRUE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_UTYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Low 12 bits of TLS LE thread pointer offset for loads and adds. */
|
|
HOWTO (R_RISCV_TPREL_LO12_I, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TPREL_LO12_I", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_ITYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Low 12 bits of TLS LE thread pointer offset for stores. */
|
|
HOWTO (R_RISCV_TPREL_LO12_S, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TPREL_LO12_S", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_STYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* TLS LE thread pointer usage. May be relaxed. */
|
|
HOWTO (R_RISCV_TPREL_ADD, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TPREL_ADD", /* name */
|
|
TRUE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 8-bit in-place addition, for local label subtraction. */
|
|
HOWTO (R_RISCV_ADD8, /* type */
|
|
0, /* rightshift */
|
|
0, /* size */
|
|
8, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
riscv_elf_add_sub_reloc, /* special_function */
|
|
"R_RISCV_ADD8", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 16-bit in-place addition, for local label subtraction. */
|
|
HOWTO (R_RISCV_ADD16, /* type */
|
|
0, /* rightshift */
|
|
1, /* size */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
riscv_elf_add_sub_reloc, /* special_function */
|
|
"R_RISCV_ADD16", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 32-bit in-place addition, for local label subtraction. */
|
|
HOWTO (R_RISCV_ADD32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
riscv_elf_add_sub_reloc, /* special_function */
|
|
"R_RISCV_ADD32", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 64-bit in-place addition, for local label subtraction. */
|
|
HOWTO (R_RISCV_ADD64, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
riscv_elf_add_sub_reloc, /* special_function */
|
|
"R_RISCV_ADD64", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 8-bit in-place addition, for local label subtraction. */
|
|
HOWTO (R_RISCV_SUB8, /* type */
|
|
0, /* rightshift */
|
|
0, /* size */
|
|
8, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
riscv_elf_add_sub_reloc, /* special_function */
|
|
"R_RISCV_SUB8", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 16-bit in-place addition, for local label subtraction. */
|
|
HOWTO (R_RISCV_SUB16, /* type */
|
|
0, /* rightshift */
|
|
1, /* size */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
riscv_elf_add_sub_reloc, /* special_function */
|
|
"R_RISCV_SUB16", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 32-bit in-place addition, for local label subtraction. */
|
|
HOWTO (R_RISCV_SUB32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
riscv_elf_add_sub_reloc, /* special_function */
|
|
"R_RISCV_SUB32", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 64-bit in-place addition, for local label subtraction. */
|
|
HOWTO (R_RISCV_SUB64, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
riscv_elf_add_sub_reloc, /* special_function */
|
|
"R_RISCV_SUB64", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* GNU extension to record C++ vtable hierarchy */
|
|
HOWTO (R_RISCV_GNU_VTINHERIT, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
NULL, /* special_function */
|
|
"R_RISCV_GNU_VTINHERIT", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* GNU extension to record C++ vtable member usage */
|
|
HOWTO (R_RISCV_GNU_VTENTRY, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
|
|
"R_RISCV_GNU_VTENTRY", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Indicates an alignment statement. The addend field encodes how many
|
|
bytes of NOPs follow the statement. The desired alignment is the
|
|
addend rounded up to the next power of two. */
|
|
HOWTO (R_RISCV_ALIGN, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_ALIGN", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* 8-bit PC-relative branch offset. */
|
|
HOWTO (R_RISCV_RVC_BRANCH, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_RVC_BRANCH", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_RVC_B_IMM (-1U), /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* 11-bit PC-relative jump offset. */
|
|
HOWTO (R_RISCV_RVC_JUMP, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_RVC_JUMP", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_RVC_J_IMM (-1U), /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* High 6 bits of 18-bit absolute address. */
|
|
HOWTO (R_RISCV_RVC_LUI, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_RVC_LUI", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_RVC_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* GP-relative load. */
|
|
HOWTO (R_RISCV_GPREL_I, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_GPREL_I", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_ITYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* GP-relative store. */
|
|
HOWTO (R_RISCV_GPREL_S, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_GPREL_S", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_STYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* TP-relative TLS LE load. */
|
|
HOWTO (R_RISCV_TPREL_I, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TPREL_I", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_ITYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* TP-relative TLS LE store. */
|
|
HOWTO (R_RISCV_TPREL_S, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_TPREL_S", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ENCODE_STYPE_IMM (-1U), /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* The paired relocation may be relaxed. */
|
|
HOWTO (R_RISCV_RELAX, /* type */
|
|
0, /* rightshift */
|
|
3, /* size */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_RELAX", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 6-bit in-place addition, for local label subtraction. */
|
|
HOWTO (R_RISCV_SUB6, /* type */
|
|
0, /* rightshift */
|
|
0, /* size */
|
|
8, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
riscv_elf_add_sub_reloc, /* special_function */
|
|
"R_RISCV_SUB6", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0x3f, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 6-bit in-place setting, for local label subtraction. */
|
|
HOWTO (R_RISCV_SET6, /* type */
|
|
0, /* rightshift */
|
|
0, /* size */
|
|
8, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_SET6", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0x3f, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 8-bit in-place setting, for local label subtraction. */
|
|
HOWTO (R_RISCV_SET8, /* type */
|
|
0, /* rightshift */
|
|
0, /* size */
|
|
8, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_SET8", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 16-bit in-place setting, for local label subtraction. */
|
|
HOWTO (R_RISCV_SET16, /* type */
|
|
0, /* rightshift */
|
|
1, /* size */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_SET16", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 32-bit in-place setting, for local label subtraction. */
|
|
HOWTO (R_RISCV_SET32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_SET32", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* 32-bit PC relative. */
|
|
HOWTO (R_RISCV_32_PCREL, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
32, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_RISCV_32_PCREL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
MINUS_ONE, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
};
|
|
|
|
/* A mapping from BFD reloc types to RISC-V ELF reloc types. */
|
|
|
|
struct elf_reloc_map
|
|
{
|
|
bfd_reloc_code_real_type bfd_val;
|
|
enum elf_riscv_reloc_type elf_val;
|
|
};
|
|
|
|
static const struct elf_reloc_map riscv_reloc_map[] =
|
|
{
|
|
{ BFD_RELOC_NONE, R_RISCV_NONE },
|
|
{ BFD_RELOC_32, R_RISCV_32 },
|
|
{ BFD_RELOC_64, R_RISCV_64 },
|
|
{ BFD_RELOC_RISCV_ADD8, R_RISCV_ADD8 },
|
|
{ BFD_RELOC_RISCV_ADD16, R_RISCV_ADD16 },
|
|
{ BFD_RELOC_RISCV_ADD32, R_RISCV_ADD32 },
|
|
{ BFD_RELOC_RISCV_ADD64, R_RISCV_ADD64 },
|
|
{ BFD_RELOC_RISCV_SUB8, R_RISCV_SUB8 },
|
|
{ BFD_RELOC_RISCV_SUB16, R_RISCV_SUB16 },
|
|
{ BFD_RELOC_RISCV_SUB32, R_RISCV_SUB32 },
|
|
{ BFD_RELOC_RISCV_SUB64, R_RISCV_SUB64 },
|
|
{ BFD_RELOC_CTOR, R_RISCV_64 },
|
|
{ BFD_RELOC_12_PCREL, R_RISCV_BRANCH },
|
|
{ BFD_RELOC_RISCV_HI20, R_RISCV_HI20 },
|
|
{ BFD_RELOC_RISCV_LO12_I, R_RISCV_LO12_I },
|
|
{ BFD_RELOC_RISCV_LO12_S, R_RISCV_LO12_S },
|
|
{ BFD_RELOC_RISCV_PCREL_LO12_I, R_RISCV_PCREL_LO12_I },
|
|
{ BFD_RELOC_RISCV_PCREL_LO12_S, R_RISCV_PCREL_LO12_S },
|
|
{ BFD_RELOC_RISCV_CALL, R_RISCV_CALL },
|
|
{ BFD_RELOC_RISCV_CALL_PLT, R_RISCV_CALL_PLT },
|
|
{ BFD_RELOC_RISCV_PCREL_HI20, R_RISCV_PCREL_HI20 },
|
|
{ BFD_RELOC_RISCV_JMP, R_RISCV_JAL },
|
|
{ BFD_RELOC_RISCV_GOT_HI20, R_RISCV_GOT_HI20 },
|
|
{ BFD_RELOC_RISCV_TLS_DTPMOD32, R_RISCV_TLS_DTPMOD32 },
|
|
{ BFD_RELOC_RISCV_TLS_DTPREL32, R_RISCV_TLS_DTPREL32 },
|
|
{ BFD_RELOC_RISCV_TLS_DTPMOD64, R_RISCV_TLS_DTPMOD64 },
|
|
{ BFD_RELOC_RISCV_TLS_DTPREL64, R_RISCV_TLS_DTPREL64 },
|
|
{ BFD_RELOC_RISCV_TLS_TPREL32, R_RISCV_TLS_TPREL32 },
|
|
{ BFD_RELOC_RISCV_TLS_TPREL64, R_RISCV_TLS_TPREL64 },
|
|
{ BFD_RELOC_RISCV_TPREL_HI20, R_RISCV_TPREL_HI20 },
|
|
{ BFD_RELOC_RISCV_TPREL_ADD, R_RISCV_TPREL_ADD },
|
|
{ BFD_RELOC_RISCV_TPREL_LO12_S, R_RISCV_TPREL_LO12_S },
|
|
{ BFD_RELOC_RISCV_TPREL_LO12_I, R_RISCV_TPREL_LO12_I },
|
|
{ BFD_RELOC_RISCV_TLS_GOT_HI20, R_RISCV_TLS_GOT_HI20 },
|
|
{ BFD_RELOC_RISCV_TLS_GD_HI20, R_RISCV_TLS_GD_HI20 },
|
|
{ BFD_RELOC_RISCV_ALIGN, R_RISCV_ALIGN },
|
|
{ BFD_RELOC_RISCV_RVC_BRANCH, R_RISCV_RVC_BRANCH },
|
|
{ BFD_RELOC_RISCV_RVC_JUMP, R_RISCV_RVC_JUMP },
|
|
{ BFD_RELOC_RISCV_RVC_LUI, R_RISCV_RVC_LUI },
|
|
{ BFD_RELOC_RISCV_GPREL_I, R_RISCV_GPREL_I },
|
|
{ BFD_RELOC_RISCV_GPREL_S, R_RISCV_GPREL_S },
|
|
{ BFD_RELOC_RISCV_TPREL_I, R_RISCV_TPREL_I },
|
|
{ BFD_RELOC_RISCV_TPREL_S, R_RISCV_TPREL_S },
|
|
{ BFD_RELOC_RISCV_RELAX, R_RISCV_RELAX },
|
|
{ BFD_RELOC_RISCV_SUB6, R_RISCV_SUB6 },
|
|
{ BFD_RELOC_RISCV_SET6, R_RISCV_SET6 },
|
|
{ BFD_RELOC_RISCV_SET8, R_RISCV_SET8 },
|
|
{ BFD_RELOC_RISCV_SET16, R_RISCV_SET16 },
|
|
{ BFD_RELOC_RISCV_SET32, R_RISCV_SET32 },
|
|
{ BFD_RELOC_RISCV_32_PCREL, R_RISCV_32_PCREL },
|
|
};
|
|
|
|
/* Given a BFD reloc type, return a howto structure. */
|
|
|
|
reloc_howto_type *
|
|
riscv_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
bfd_reloc_code_real_type code)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE (riscv_reloc_map); i++)
|
|
if (riscv_reloc_map[i].bfd_val == code)
|
|
return &howto_table[(int) riscv_reloc_map[i].elf_val];
|
|
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return NULL;
|
|
}
|
|
|
|
reloc_howto_type *
|
|
riscv_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE (howto_table); i++)
|
|
if (howto_table[i].name && strcasecmp (howto_table[i].name, r_name) == 0)
|
|
return &howto_table[i];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
reloc_howto_type *
|
|
riscv_elf_rtype_to_howto (bfd *abfd, unsigned int r_type)
|
|
{
|
|
if (r_type >= ARRAY_SIZE (howto_table))
|
|
{
|
|
(*_bfd_error_handler) (_("%pB: unsupported relocation type %#x"),
|
|
abfd, r_type);
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return NULL;
|
|
}
|
|
return &howto_table[r_type];
|
|
}
|
|
|
|
/* Special_function of RISCV_ADD and RISCV_SUB relocations. */
|
|
|
|
static bfd_reloc_status_type
|
|
riscv_elf_add_sub_reloc (bfd *abfd,
|
|
arelent *reloc_entry,
|
|
asymbol *symbol,
|
|
void *data,
|
|
asection *input_section,
|
|
bfd *output_bfd,
|
|
char **error_message ATTRIBUTE_UNUSED)
|
|
{
|
|
reloc_howto_type *howto = reloc_entry->howto;
|
|
bfd_vma relocation;
|
|
|
|
if (output_bfd != NULL
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
|
&& (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
|
|
{
|
|
reloc_entry->address += input_section->output_offset;
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
if (output_bfd != NULL)
|
|
return bfd_reloc_continue;
|
|
|
|
relocation = symbol->value + symbol->section->output_section->vma
|
|
+ symbol->section->output_offset + reloc_entry->addend;
|
|
bfd_vma old_value = bfd_get (howto->bitsize, abfd,
|
|
data + reloc_entry->address);
|
|
|
|
switch (howto->type)
|
|
{
|
|
case R_RISCV_ADD8:
|
|
case R_RISCV_ADD16:
|
|
case R_RISCV_ADD32:
|
|
case R_RISCV_ADD64:
|
|
relocation = old_value + relocation;
|
|
break;
|
|
case R_RISCV_SUB6:
|
|
case R_RISCV_SUB8:
|
|
case R_RISCV_SUB16:
|
|
case R_RISCV_SUB32:
|
|
case R_RISCV_SUB64:
|
|
relocation = old_value - relocation;
|
|
break;
|
|
}
|
|
bfd_put (howto->bitsize, abfd, relocation, data + reloc_entry->address);
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
/* Parsing subset version.
|
|
|
|
Return Value:
|
|
Points to the end of version
|
|
|
|
Arguments:
|
|
`rps`: Hooks and status for parsing subset.
|
|
`march`: Full arch string.
|
|
`p`: Curent parsing position.
|
|
`major_version`: Parsing result of major version, using
|
|
default_major_version if version is not present in arch string.
|
|
`minor_version`: Parsing result of minor version, set to 0 if version is
|
|
not present in arch string, but set to `default_minor_version` if
|
|
`major_version` using default_major_version.
|
|
`default_major_version`: Default major version.
|
|
`default_minor_version`: Default minor version.
|
|
`std_ext_p`: True if parsing std extension. */
|
|
|
|
static const char *
|
|
riscv_parsing_subset_version (riscv_parse_subset_t *rps,
|
|
const char *march,
|
|
const char *p,
|
|
unsigned *major_version,
|
|
unsigned *minor_version,
|
|
unsigned default_major_version,
|
|
unsigned default_minor_version,
|
|
bfd_boolean std_ext_p)
|
|
{
|
|
bfd_boolean major_p = TRUE;
|
|
unsigned version = 0;
|
|
unsigned major = 0;
|
|
unsigned minor = 0;
|
|
char np;
|
|
|
|
for (;*p; ++p)
|
|
{
|
|
if (*p == 'p')
|
|
{
|
|
np = *(p + 1);
|
|
|
|
if (!ISDIGIT (np))
|
|
{
|
|
/* Might be beginning of `p` extension. */
|
|
if (std_ext_p)
|
|
{
|
|
*major_version = version;
|
|
*minor_version = 0;
|
|
return p;
|
|
}
|
|
else
|
|
{
|
|
rps->error_handler ("-march=%s: Expect number after `%dp'.",
|
|
march, version);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
major = version;
|
|
major_p = FALSE;
|
|
version = 0;
|
|
}
|
|
else if (ISDIGIT (*p))
|
|
version = (version * 10) + (*p - '0');
|
|
else
|
|
break;
|
|
}
|
|
|
|
if (major_p)
|
|
major = version;
|
|
else
|
|
minor = version;
|
|
|
|
if (major == 0 && minor == 0)
|
|
{
|
|
/* We don't found any version string, use default version. */
|
|
*major_version = default_major_version;
|
|
*minor_version = default_minor_version;
|
|
}
|
|
else
|
|
{
|
|
*major_version = major;
|
|
*minor_version = minor;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/* Return string which contain all supported standard extensions in
|
|
canonical order. */
|
|
|
|
const char *
|
|
riscv_supported_std_ext (void)
|
|
{
|
|
return "mafdqlcbjtpvn";
|
|
}
|
|
|
|
/* Parsing function for standard extensions.
|
|
|
|
Return Value:
|
|
Points to the end of extensions.
|
|
|
|
Arguments:
|
|
`rps`: Hooks and status for parsing subset.
|
|
`march`: Full arch string.
|
|
`p`: Curent parsing position. */
|
|
|
|
static const char *
|
|
riscv_parse_std_ext (riscv_parse_subset_t *rps,
|
|
const char *march, const char *p)
|
|
{
|
|
const char *all_std_exts = riscv_supported_std_ext ();
|
|
const char *std_exts = all_std_exts;
|
|
|
|
unsigned major_version = 0;
|
|
unsigned minor_version = 0;
|
|
char std_ext = '\0';
|
|
|
|
/* First letter must start with i, e or g. */
|
|
switch (*p)
|
|
{
|
|
case 'i':
|
|
p++;
|
|
p = riscv_parsing_subset_version (
|
|
rps,
|
|
march,
|
|
p, &major_version, &minor_version,
|
|
/* default_major_version= */ 2,
|
|
/* default_minor_version= */ 0,
|
|
/* std_ext_p= */TRUE);
|
|
riscv_add_subset (rps->subset_list, "i", major_version, minor_version);
|
|
break;
|
|
|
|
case 'e':
|
|
p++;
|
|
p = riscv_parsing_subset_version (
|
|
rps,
|
|
march,
|
|
p, &major_version, &minor_version,
|
|
/* default_major_version= */ 1,
|
|
/* default_minor_version= */ 9,
|
|
/* std_ext_p= */TRUE);
|
|
|
|
riscv_add_subset (rps->subset_list, "e", major_version, minor_version);
|
|
riscv_add_subset (rps->subset_list, "i", 2, 0);
|
|
|
|
if (*rps->xlen > 32)
|
|
{
|
|
rps->error_handler ("-march=%s: rv%de is not a valid base ISA",
|
|
march, *rps->xlen);
|
|
return NULL;
|
|
}
|
|
|
|
break;
|
|
|
|
case 'g':
|
|
p++;
|
|
p = riscv_parsing_subset_version (
|
|
rps,
|
|
march,
|
|
p, &major_version, &minor_version,
|
|
/* default_major_version= */ 2,
|
|
/* default_minor_version= */ 0,
|
|
/* std_ext_p= */TRUE);
|
|
riscv_add_subset (rps->subset_list, "i", major_version, minor_version);
|
|
|
|
for ( ; *std_exts != 'q'; std_exts++)
|
|
{
|
|
const char subset[] = {*std_exts, '\0'};
|
|
riscv_add_subset (
|
|
rps->subset_list, subset, major_version, minor_version);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
rps->error_handler (
|
|
"-march=%s: first ISA subset must be `e', `i' or `g'", march);
|
|
return NULL;
|
|
}
|
|
|
|
while (*p)
|
|
{
|
|
char subset[2] = {0, 0};
|
|
|
|
if (*p == 'x' || *p == 's' || *p == 'z')
|
|
break;
|
|
|
|
if (*p == '_')
|
|
{
|
|
p++;
|
|
continue;
|
|
}
|
|
|
|
std_ext = *p;
|
|
|
|
/* Checking canonical order. */
|
|
while (*std_exts && std_ext != *std_exts) std_exts++;
|
|
|
|
if (std_ext != *std_exts)
|
|
{
|
|
if (strchr (all_std_exts, std_ext) == NULL)
|
|
rps->error_handler (
|
|
"-march=%s: unsupported ISA subset `%c'", march, *p);
|
|
else
|
|
rps->error_handler (
|
|
"-march=%s: ISA string is not in canonical order. `%c'",
|
|
march, *p);
|
|
return NULL;
|
|
}
|
|
|
|
std_exts++;
|
|
|
|
p++;
|
|
p = riscv_parsing_subset_version (
|
|
rps,
|
|
march,
|
|
p, &major_version, &minor_version,
|
|
/* default_major_version= */ 2,
|
|
/* default_minor_version= */ 0,
|
|
/* std_ext_p= */TRUE);
|
|
|
|
subset[0] = std_ext;
|
|
|
|
riscv_add_subset (rps->subset_list, subset, major_version, minor_version);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/* Classify the argument 'arch' into one of riscv_isa_ext_class_t. */
|
|
|
|
riscv_isa_ext_class_t
|
|
riscv_get_prefix_class (const char *arch)
|
|
{
|
|
switch (*arch)
|
|
{
|
|
case 's': return RV_ISA_CLASS_S;
|
|
case 'x': return RV_ISA_CLASS_X;
|
|
case 'z': return RV_ISA_CLASS_Z;
|
|
default: return RV_ISA_CLASS_UNKNOWN;
|
|
}
|
|
}
|
|
|
|
/* Structure describing parameters to use when parsing a particular
|
|
riscv_isa_ext_class_t. One of these should be provided for each
|
|
possible class, except RV_ISA_CLASS_UNKNOWN. */
|
|
|
|
typedef struct riscv_parse_config
|
|
{
|
|
/* Class of the extension. */
|
|
riscv_isa_ext_class_t class;
|
|
|
|
/* Lower-case prefix string for error printing
|
|
and internal parser usage, e.g. "z", "x". */
|
|
const char *prefix;
|
|
|
|
/* Predicate which is used for checking whether
|
|
this is a "known" extension. For 'x',
|
|
it always returns true (since they are by
|
|
definition non-standard and cannot be known. */
|
|
bfd_boolean (*ext_valid_p) (const char *);
|
|
} riscv_parse_config_t;
|
|
|
|
/* Parse a generic prefixed extension.
|
|
march: The full architecture string as passed in by "-march=...".
|
|
p: Point from which to start parsing the -march string.
|
|
config: What class of extensions to parse, predicate funcs,
|
|
and strings to use in error reporting. */
|
|
|
|
static const char *
|
|
riscv_parse_prefixed_ext (riscv_parse_subset_t *rps,
|
|
const char *march,
|
|
const char *p,
|
|
const riscv_parse_config_t *config)
|
|
{
|
|
unsigned major_version = 0;
|
|
unsigned minor_version = 0;
|
|
const char *last_name;
|
|
riscv_isa_ext_class_t class;
|
|
|
|
while (*p)
|
|
{
|
|
if (*p == '_')
|
|
{
|
|
p++;
|
|
continue;
|
|
}
|
|
|
|
/* Assert that the current extension specifier matches our parsing
|
|
class. */
|
|
class = riscv_get_prefix_class (p);
|
|
if (class != config->class)
|
|
break;
|
|
|
|
char *subset = xstrdup (p);
|
|
char *q = subset;
|
|
const char *end_of_version;
|
|
|
|
while (*++q != '\0' && *q != '_' && !ISDIGIT (*q))
|
|
;
|
|
|
|
end_of_version =
|
|
riscv_parsing_subset_version (
|
|
rps,
|
|
march,
|
|
q, &major_version, &minor_version,
|
|
/* default_major_version= */ 2,
|
|
/* default_minor_version= */ 0,
|
|
/* std_ext_p= */FALSE);
|
|
|
|
*q = '\0';
|
|
|
|
/* Check that the name is valid.
|
|
For 'x', anything goes but it cannot simply be 'x'.
|
|
For 's', it must be known from a list and cannot simply be 's'.
|
|
For 'z', it must be known from a list and cannot simply be 'z'. */
|
|
|
|
/* Check that the extension name is well-formed. */
|
|
if (!config->ext_valid_p (subset))
|
|
{
|
|
rps->error_handler
|
|
("-march=%s: Invalid or unknown %s ISA extension: '%s'",
|
|
march, config->prefix, subset);
|
|
free (subset);
|
|
return NULL;
|
|
}
|
|
|
|
/* Check that the last item is not the same as this. */
|
|
last_name = rps->subset_list->tail->name;
|
|
|
|
if (!strcasecmp (last_name, subset))
|
|
{
|
|
rps->error_handler ("-march=%s: Duplicate %s ISA extension: \'%s\'",
|
|
march, config->prefix, subset);
|
|
free (subset);
|
|
return NULL;
|
|
}
|
|
|
|
/* Check that we are in alphabetical order within the subset. */
|
|
if (!strncasecmp (last_name, config->prefix, 1)
|
|
&& strcasecmp (last_name, subset) > 0)
|
|
{
|
|
rps->error_handler ("-march=%s: %s ISA extension not in alphabetical "
|
|
"order: \'%s\' must come before \'%s\'.",
|
|
march, config->prefix, subset, last_name);
|
|
free (subset);
|
|
return NULL;
|
|
}
|
|
|
|
riscv_add_subset (rps->subset_list, subset, major_version, minor_version);
|
|
free (subset);
|
|
p += end_of_version - subset;
|
|
|
|
if (*p != '\0' && *p != '_')
|
|
{
|
|
rps->error_handler ("-march=%s: %s must separate with _",
|
|
march, config->prefix);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
/* List of Z-class extensions that binutils should know about.
|
|
Whether or not a particular entry is in this list will
|
|
dictate if gas/ld will accept its presence in the -march
|
|
string.
|
|
|
|
Example: To add an extension called "Zbb" (bitmanip base extension),
|
|
add "zbb" string to the list (all lowercase).
|
|
|
|
Keep this list alphabetically ordered. */
|
|
|
|
static const char * const riscv_std_z_ext_strtab[] =
|
|
{
|
|
NULL
|
|
};
|
|
|
|
/* Same as `riscv_std_z_ext_strtab', but for S-class extensions. */
|
|
|
|
static const char * const riscv_std_s_ext_strtab[] =
|
|
{
|
|
NULL
|
|
};
|
|
|
|
/* For the extension EXT, search through the list of known extensions
|
|
KNOWN_EXTS for a match, and return TRUE if found. */
|
|
|
|
static bfd_boolean
|
|
riscv_multi_letter_ext_valid_p (const char *ext,
|
|
const char *const *known_exts)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; known_exts[i]; ++i)
|
|
if (!strcmp (ext, known_exts[i]))
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Predicator function for x-prefixed extensions.
|
|
Anything goes, except the literal 'x'. */
|
|
|
|
static bfd_boolean
|
|
riscv_ext_x_valid_p (const char *arg)
|
|
{
|
|
if (!strcasecmp (arg, "x"))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Predicator functions for z-prefixed extensions.
|
|
Only known z-extensions are permitted. */
|
|
|
|
static bfd_boolean
|
|
riscv_ext_z_valid_p (const char *arg)
|
|
{
|
|
return riscv_multi_letter_ext_valid_p (arg, riscv_std_z_ext_strtab);
|
|
}
|
|
|
|
/* Predicator function for 's' prefixed extensions.
|
|
Must be either literal 's', or a known s-prefixed extension. */
|
|
|
|
static bfd_boolean
|
|
riscv_ext_s_valid_p (const char *arg)
|
|
{
|
|
return riscv_multi_letter_ext_valid_p (arg, riscv_std_s_ext_strtab);
|
|
}
|
|
|
|
/* Parsing order that is specified by the ISA manual. */
|
|
|
|
static const riscv_parse_config_t parse_config[] =
|
|
{
|
|
{RV_ISA_CLASS_S, "s", riscv_ext_s_valid_p},
|
|
{RV_ISA_CLASS_Z, "z", riscv_ext_z_valid_p},
|
|
{RV_ISA_CLASS_X, "x", riscv_ext_x_valid_p},
|
|
{RV_ISA_CLASS_UNKNOWN, NULL, NULL}
|
|
};
|
|
|
|
/* Function for parsing arch string.
|
|
|
|
Return Value:
|
|
Return TRUE on success.
|
|
|
|
Arguments:
|
|
`rps`: Hooks and status for parsing subset.
|
|
`arch`: Arch string. */
|
|
|
|
bfd_boolean
|
|
riscv_parse_subset (riscv_parse_subset_t *rps,
|
|
const char *arch)
|
|
{
|
|
const char *p = arch;
|
|
size_t i;
|
|
|
|
if (strncmp (p, "rv32", 4) == 0)
|
|
{
|
|
*rps->xlen = 32;
|
|
p += 4;
|
|
}
|
|
else if (strncmp (p, "rv64", 4) == 0)
|
|
{
|
|
*rps->xlen = 64;
|
|
p += 4;
|
|
}
|
|
else
|
|
{
|
|
rps->error_handler ("-march=%s: ISA string must begin with rv32 or rv64",
|
|
arch);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Parsing standard extension. */
|
|
p = riscv_parse_std_ext (rps, arch, p);
|
|
|
|
if (p == NULL)
|
|
return FALSE;
|
|
|
|
/* Parse the different classes of extensions in the specified order. */
|
|
|
|
for (i = 0; i < ARRAY_SIZE (parse_config); ++i) {
|
|
p = riscv_parse_prefixed_ext (rps, arch, p, &parse_config[i]);
|
|
|
|
if (p == NULL)
|
|
return FALSE;
|
|
}
|
|
|
|
if (*p != '\0')
|
|
{
|
|
rps->error_handler ("-march=%s: unexpected ISA string at end: %s",
|
|
arch, p);
|
|
return FALSE;
|
|
}
|
|
|
|
if (riscv_lookup_subset (rps->subset_list, "e")
|
|
&& riscv_lookup_subset (rps->subset_list, "f"))
|
|
{
|
|
rps->error_handler ("-march=%s: rv32e does not support the `f' extension",
|
|
arch);
|
|
return FALSE;
|
|
}
|
|
|
|
if (riscv_lookup_subset (rps->subset_list, "d")
|
|
&& !riscv_lookup_subset (rps->subset_list, "f"))
|
|
{
|
|
rps->error_handler ("-march=%s: `d' extension requires `f' extension",
|
|
arch);
|
|
return FALSE;
|
|
}
|
|
|
|
if (riscv_lookup_subset (rps->subset_list, "q")
|
|
&& !riscv_lookup_subset (rps->subset_list, "d"))
|
|
{
|
|
rps->error_handler ("-march=%s: `q' extension requires `d' extension",
|
|
arch);
|
|
return FALSE;
|
|
}
|
|
|
|
if (riscv_lookup_subset (rps->subset_list, "q") && *rps->xlen < 64)
|
|
{
|
|
rps->error_handler ("-march=%s: rv32 does not support the `q' extension",
|
|
arch);
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Add new subset to list. */
|
|
|
|
void
|
|
riscv_add_subset (riscv_subset_list_t *subset_list,
|
|
const char *subset,
|
|
int major, int minor)
|
|
{
|
|
riscv_subset_t *s = xmalloc (sizeof *s);
|
|
|
|
if (subset_list->head == NULL)
|
|
subset_list->head = s;
|
|
|
|
s->name = xstrdup (subset);
|
|
s->major_version = major;
|
|
s->minor_version = minor;
|
|
s->next = NULL;
|
|
|
|
if (subset_list->tail != NULL)
|
|
subset_list->tail->next = s;
|
|
|
|
subset_list->tail = s;
|
|
}
|
|
|
|
/* Find subset in list without version checking, return NULL if not found. */
|
|
|
|
riscv_subset_t *
|
|
riscv_lookup_subset (const riscv_subset_list_t *subset_list,
|
|
const char *subset)
|
|
{
|
|
return riscv_lookup_subset_version (
|
|
subset_list, subset,
|
|
RISCV_DONT_CARE_VERSION,
|
|
RISCV_DONT_CARE_VERSION);
|
|
}
|
|
|
|
/* Find subset in list with version checking, return NULL if not found. */
|
|
|
|
riscv_subset_t *
|
|
riscv_lookup_subset_version (const riscv_subset_list_t *subset_list,
|
|
const char *subset,
|
|
int major, int minor)
|
|
{
|
|
riscv_subset_t *s;
|
|
|
|
for (s = subset_list->head; s != NULL; s = s->next)
|
|
if (strcasecmp (s->name, subset) == 0)
|
|
{
|
|
if ((major != RISCV_DONT_CARE_VERSION)
|
|
&& (s->major_version != major))
|
|
return NULL;
|
|
|
|
if ((minor != RISCV_DONT_CARE_VERSION)
|
|
&& (s->minor_version != minor))
|
|
return NULL;
|
|
|
|
return s;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Release subset list. */
|
|
|
|
void
|
|
riscv_release_subset_list (riscv_subset_list_t *subset_list)
|
|
{
|
|
while (subset_list->head != NULL)
|
|
{
|
|
riscv_subset_t *next = subset_list->head->next;
|
|
free ((void *)subset_list->head->name);
|
|
free (subset_list->head);
|
|
subset_list->head = next;
|
|
}
|
|
|
|
subset_list->tail = NULL;
|
|
}
|
|
|
|
/* Return the number of digits for the input. */
|
|
|
|
static size_t
|
|
riscv_estimate_digit (unsigned num)
|
|
{
|
|
size_t digit = 0;
|
|
if (num == 0)
|
|
return 1;
|
|
|
|
for (digit = 0; num ; num /= 10)
|
|
digit++;
|
|
|
|
return digit;
|
|
}
|
|
|
|
/* Auxiliary function to estimate string length of subset list. */
|
|
|
|
static size_t
|
|
riscv_estimate_arch_strlen1 (const riscv_subset_t *subset)
|
|
{
|
|
if (subset == NULL)
|
|
return 6; /* For rv32/rv64/rv128 and string terminator. */
|
|
|
|
return riscv_estimate_arch_strlen1 (subset->next)
|
|
+ strlen (subset->name)
|
|
+ riscv_estimate_digit (subset->major_version)
|
|
+ 1 /* For version seperator: 'p'. */
|
|
+ riscv_estimate_digit (subset->minor_version)
|
|
+ 1 /* For underscore. */;
|
|
}
|
|
|
|
/* Estimate the string length of this subset list. */
|
|
|
|
static size_t
|
|
riscv_estimate_arch_strlen (const riscv_subset_list_t *subset_list)
|
|
{
|
|
return riscv_estimate_arch_strlen1 (subset_list->head);
|
|
}
|
|
|
|
/* Auxiliary function to convert subset info to string. */
|
|
|
|
static void
|
|
riscv_arch_str1 (riscv_subset_t *subset,
|
|
char *attr_str, char *buf, size_t bufsz)
|
|
{
|
|
const char *underline = "_";
|
|
|
|
if (subset == NULL)
|
|
return;
|
|
|
|
/* No underline between rvXX and i/e. */
|
|
if ((strcasecmp (subset->name, "i") == 0)
|
|
|| (strcasecmp (subset->name, "e") == 0))
|
|
underline = "";
|
|
|
|
snprintf (buf, bufsz, "%s%s%dp%d",
|
|
underline,
|
|
subset->name,
|
|
subset->major_version,
|
|
subset->minor_version);
|
|
|
|
strncat (attr_str, buf, bufsz);
|
|
|
|
/* Skip 'i' extension after 'e'. */
|
|
if ((strcasecmp (subset->name, "e") == 0)
|
|
&& subset->next
|
|
&& (strcasecmp (subset->next->name, "i") == 0))
|
|
riscv_arch_str1 (subset->next->next, attr_str, buf, bufsz);
|
|
else
|
|
riscv_arch_str1 (subset->next, attr_str, buf, bufsz);
|
|
}
|
|
|
|
/* Convert subset info to string with explicit version info. */
|
|
|
|
char *
|
|
riscv_arch_str (unsigned xlen, const riscv_subset_list_t *subset)
|
|
{
|
|
size_t arch_str_len = riscv_estimate_arch_strlen (subset);
|
|
char *attr_str = xmalloc (arch_str_len);
|
|
char *buf = xmalloc (arch_str_len);
|
|
|
|
snprintf (attr_str, arch_str_len, "rv%u", xlen);
|
|
|
|
riscv_arch_str1 (subset->head, attr_str, buf, arch_str_len);
|
|
free (buf);
|
|
|
|
return attr_str;
|
|
}
|