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- /* BFD backend for RISC-V
- Copyright (C) 2011-2022 Free Software Foundation, Inc.
- Contributed by Andrew Waterman (andrew@sifive.com).
- Based on MIPS target.
- 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 "cpu-riscv.h"
- static const bfd_arch_info_type *
- riscv_compatible (const bfd_arch_info_type *a, const bfd_arch_info_type *b)
- {
- if (a->arch != b->arch)
- return NULL;
- /* Machine compatibility is checked in
- _bfd_riscv_elf_merge_private_bfd_data. */
- return a;
- }
- /* Return TRUE if STRING matches the architecture described by INFO. */
- static bool
- riscv_scan (const struct bfd_arch_info *info, const char *string)
- {
- if (bfd_default_scan (info, string))
- return true;
- /* The incoming STRING might take the form of riscv:rvXXzzz, where XX is
- 32 or 64, and zzz are one or more extension characters. As we
- currently only have 3 architectures defined, 'riscv', 'riscv:rv32',
- and 'riscv:rv64', we would like to ignore the zzz for the purpose of
- matching here.
- However, we don't want the default 'riscv' to match over a more
- specific 'riscv:rv32' or 'riscv:rv64', so in the case of the default
- architecture (with the shorter 'riscv' name) we don't allow any
- special matching, but for the 'riscv:rvXX' cases, we allow a match
- with any additional trailing characters being ignored. */
- if (!info->the_default
- && strncasecmp (string, info->printable_name,
- strlen (info->printable_name)) == 0)
- return true;
- return false;
- }
- #define N(BITS, NUMBER, PRINT, DEFAULT, NEXT) \
- { \
- BITS, /* Bits in a word. */ \
- BITS, /* Bits in an address. */ \
- 8, /* Bits in a byte. */ \
- bfd_arch_riscv, \
- NUMBER, \
- "riscv", \
- PRINT, \
- 3, \
- DEFAULT, \
- riscv_compatible, \
- riscv_scan, \
- bfd_arch_default_fill, \
- NEXT, \
- 0 /* Maximum offset of a reloc from the start of an insn. */\
- }
- /* This enum must be kept in the same order as arch_info_struct. */
- enum
- {
- I_riscv64,
- I_riscv32
- };
- #define NN(index) (&arch_info_struct[(index) + 1])
- /* This array must be kept in the same order as the anonymous enum above,
- and each entry except the last should end with NN (my enum value). */
- static const bfd_arch_info_type arch_info_struct[] =
- {
- N (64, bfd_mach_riscv64, "riscv:rv64", false, NN (I_riscv64)),
- N (32, bfd_mach_riscv32, "riscv:rv32", false, NULL)
- };
- /* The default architecture is riscv:rv64. */
- const bfd_arch_info_type bfd_riscv_arch =
- N (64, 0, "riscv", true, &arch_info_struct[0]);
- /* List for all supported ISA spec versions. */
- const struct riscv_spec riscv_isa_specs[] =
- {
- {"2.2", ISA_SPEC_CLASS_2P2},
- {"20190608", ISA_SPEC_CLASS_20190608},
- {"20191213", ISA_SPEC_CLASS_20191213},
- };
- /* List for all supported privileged spec versions. */
- const struct riscv_spec riscv_priv_specs[] =
- {
- {"1.9.1", PRIV_SPEC_CLASS_1P9P1},
- {"1.10", PRIV_SPEC_CLASS_1P10},
- {"1.11", PRIV_SPEC_CLASS_1P11},
- {"1.12", PRIV_SPEC_CLASS_1P12},
- };
- /* Get the corresponding CSR version class by giving privilege
- version numbers. It is usually used to convert the priv
- attribute numbers into the corresponding class. */
- void
- riscv_get_priv_spec_class_from_numbers (unsigned int major,
- unsigned int minor,
- unsigned int revision,
- enum riscv_spec_class *class)
- {
- enum riscv_spec_class class_t = *class;
- char buf[36];
- if (revision != 0)
- snprintf (buf, sizeof (buf), "%u.%u.%u", major, minor, revision);
- else
- snprintf (buf, sizeof (buf), "%u.%u", major, minor);
- RISCV_GET_PRIV_SPEC_CLASS (buf, class_t);
- *class = class_t;
- }
- /* Define mapping symbols for riscv. */
- bool
- riscv_elf_is_mapping_symbols (const char *name)
- {
- return (!strncmp (name, "$d", 2)
- || !strncmp (name, "$x", 2));
- }
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