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c9f2799101
There are two main reasons for this patch, * In the past we had two extension tables, one is used to record all supported extensions in bfd/elfxx-riscv.c, another is used to get the default extension versions in gas/config/tc-riscv.c. It is hard to maintain lots of tables in different files, but in fact we can merge them into just one table. Therefore, we now define many riscv_supported_std* tables, which record names and versions for all supported extensions. We not only use these tables to initialize the riscv_ext_order, but also use them to get the default versions of extensions, and decide if the extensions should be enbaled by default. * We add a new filed `default_enable' for the riscv_supported_std* tables, to decide if the extension should be enabled by default. For now if the `default_enable' field of the extension is set to EXT_DEFAULT, then we should enable the extension when the -march and elf architecture attributes are not set. In the future, I suppose the `default_enable' can be set to lots of EXT_<VENDOR>, each vendor can decide to open which extensions, when the target triple of vendor is chosen. The elf/linux regression tests of riscv-gnu-toolchain are passed. bfd/ * elfnn-riscv.c (cpu-riscv.h): Removed sine it is included in bfd/elfxx-riscv.h. (riscv_merge_std_ext): Updated since the field of rpe is changed. * elfxx-riscv.c (cpu-riscv.h): Removed. (riscv_implicit_subsets): Added implicit extensions for g. (struct riscv_supported_ext): Used to be riscv_ext_version. Moved from gas/config/tc-riscv.c, and added new field `default_enable' to decide if the extension should be enabled by default. (EXT_DEFAULT): Defined for `default_enable' field. (riscv_supported_std_ext): It used to return the supported standard architecture string, but now we move ext_version_table from gas/config/tc-riscv.c to here, and rename it to riscv_supported_std_ext. Currently we not only use the table to initialize riscv_ext_order, but also get the default versions of extensions, and decide if the extensions should be enbaled by default. (riscv_supported_std_z_ext): Likewise, but is used for z* extensions. (riscv_supported_std_s_ext): Likewise, but is used for s* extensions. (riscv_supported_std_h_ext): Likewise, but is used for h* extensions. (riscv_supported_std_zxm_ext): Likewise, but is used for zxm* extensions. (riscv_all_supported_ext): Includes all supported extension tables. (riscv_known_prefixed_ext): Updated. (riscv_valid_prefixed_ext): Updated. (riscv_init_ext_order): Init the riscv_ext_order table according to riscv_supported_std_ext. (riscv_get_default_ext_version): Moved from gas/config/tc-riscv.c. Get the versions of extensions from riscv_supported_std* tables. (riscv_parse_add_subset): Updated. (riscv_parse_std_ext): Updated. (riscv_set_default_arch): Set the default subset list according to the default_enable field of riscv_supported_*ext tables. (riscv_parse_subset): If the input ARCH is NULL, then we call riscv_set_default_arch to set the default subset list. * elfxx-riscv.h (cpu-riscv.h): Included. (riscv_parse_subset_t): Removed get_default_version field, and added isa_spec field to replace it. (extern riscv_supported_std_ext): Removed. gas/ * (bfd/cpu-riscv.h): Removed. (struct riscv_ext_version): Renamed and moved to bfd/elfxx-riscv.c. (ext_version_table): Likewise. (riscv_get_default_ext_version): Likewise. (ext_version_hash): Removed. (init_ext_version_hash): Removed. (riscv_set_arch): Updated since the field of rps is changed. Besides, report error when the architecture string is empty. (riscv_after_parse_args): Updated.
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/* RISC-V ELF specific backend routines.
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Copyright (C) 2011-2021 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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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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} 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 bool
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bfd_elf32_riscv_restart_relax_sections (struct bfd_link_info *);
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extern bool
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bfd_elf64_riscv_restart_relax_sections (struct bfd_link_info *);
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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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