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90840a8656
Use -march=help for gas to print all supported extensions and versions.
Here is part of the output of `as -march=help`:
All available -march extensions for RISC-V:
e 1.9
i 2.1, 2.0
m 2.0
a 2.1, 2.0
f 2.2, 2.0
d 2.2, 2.0
q 2.2, 2.0
c 2.0
v 1.0
h 1.0
zicbom 1.0
zicbop 1.0
...
This patch assumes that the supported extensions with the same versions
are listed together. For example:
static struct riscv_supported_ext riscv_supported_std_ext[] =
{
...
{"i", ISA_SPEC_CLASS_20191213, 2, 1, 0 },
{"i", ISA_SPEC_CLASS_20190608, 2, 1, 0 },
{"i", ISA_SPEC_CLASS_2P2, 2, 0, 0 },
...
};
For the "i" extension, 2.1.0 with different spec class are listed together.
This patch records the previous printed extension and version. If the
current extension and version are the same as the previous one, skip
printing.
bfd/
* elfxx-riscv.c (riscv_print_extensions): New function. Print
available extensions and versions.
* elfxx-riscv.h (riscv_print_extensions): New declaration.
gas/
* gas/config/tc-riscv.c (md_parse_option): Parse 'help' keyword in
-march option to print available extensions and versions.
* testsuite/gas/riscv/march-help.l: New testcase for -march=help.
* testsuite/gas/riscv/riscv.exp: Updated.
131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/* RISC-V ELF specific backend routines.
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Copyright (C) 2011-2024 Free Software Foundation, Inc.
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Contributed by Andrew Waterman (andrew@sifive.com).
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Based on MIPS target.
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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; see the file COPYING3. If not,
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see <http://www.gnu.org/licenses/>. */
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#include "elf/common.h"
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#include "elf/internal.h"
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#include "opcode/riscv.h"
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#include "cpu-riscv.h"
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#define RISCV_UNKNOWN_VERSION -1
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struct riscv_elf_params
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{
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/* Whether to relax code sequences to GP-relative addressing. */
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bool relax_gp;
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/* Whether to check if SUB_ULEB128 relocation has non-zero addend. */
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bool check_uleb128;
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};
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extern void riscv_elf32_set_options (struct bfd_link_info *,
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struct riscv_elf_params *);
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extern void riscv_elf64_set_options (struct bfd_link_info *,
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struct riscv_elf_params *);
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extern reloc_howto_type *
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riscv_reloc_name_lookup (bfd *, const char *);
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extern reloc_howto_type *
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riscv_reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
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extern reloc_howto_type *
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riscv_elf_rtype_to_howto (bfd *, unsigned int r_type);
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/* The information of architecture attribute. */
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struct riscv_subset_t
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{
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const char *name;
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int major_version;
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int minor_version;
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struct riscv_subset_t *next;
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};
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typedef struct riscv_subset_t riscv_subset_t;
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typedef struct
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{
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riscv_subset_t *head;
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riscv_subset_t *tail;
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const char *arch_str;
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} riscv_subset_list_t;
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extern void
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riscv_release_subset_list (riscv_subset_list_t *);
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extern void
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riscv_add_subset (riscv_subset_list_t *,
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const char *,
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int, int);
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extern bool
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riscv_lookup_subset (const riscv_subset_list_t *,
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const char *,
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riscv_subset_t **);
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typedef struct
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{
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riscv_subset_list_t *subset_list;
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void (*error_handler) (const char *,
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...) ATTRIBUTE_PRINTF_1;
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unsigned *xlen;
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enum riscv_spec_class *isa_spec;
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bool check_unknown_prefixed_ext;
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} riscv_parse_subset_t;
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extern bool
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riscv_parse_subset (riscv_parse_subset_t *,
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const char *);
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extern void
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riscv_release_subset_list (riscv_subset_list_t *);
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extern char *
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riscv_arch_str (unsigned, const riscv_subset_list_t *);
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extern size_t
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riscv_estimate_digit (unsigned);
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extern int
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riscv_compare_subsets (const char *, const char *);
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extern riscv_subset_list_t *
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riscv_copy_subset_list (riscv_subset_list_t *);
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extern bool
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riscv_update_subset (riscv_parse_subset_t *, const char *);
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extern bool
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riscv_subset_supports (riscv_parse_subset_t *, const char *);
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extern bool
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riscv_multi_subset_supports (riscv_parse_subset_t *, enum riscv_insn_class);
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extern const char *
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riscv_multi_subset_supports_ext (riscv_parse_subset_t *, enum riscv_insn_class);
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extern void
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riscv_print_extensions (void);
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extern void
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bfd_elf32_riscv_set_data_segment_info (struct bfd_link_info *, int *);
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extern void
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bfd_elf64_riscv_set_data_segment_info (struct bfd_link_info *, int *);
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