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#!/usr/bin/env python3
# pylint: disable=invalid-name
# Copyright (C) 2024-2025 Free Software Foundation, Inc.
# Contributed by Timur Golubovich
# This file is part of GDB.
# 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. If not, see <http://www.gnu.org/licenses/>.
# To get help message for this script, run:
# ./gdb/syscalls/riscv-canonicalize-syscall-gen.py --help
# Execution result:
# usage: riscv-canonicalize-syscall-gen.py [-h] -i INPUT
#
# Generate file gdb/riscv-canonicalize-syscall-gen.c from path to riscv linux syscalls.
#
# options:
# -h, --help show this help message and exit
# -i INPUT, --input INPUT
# path to riscv linux syscalls (glibc/sysdeps/unix/sysv/linux/riscv/rv64/arch-syscall.h)
import argparse
import re
import sys
from pathlib import Path as _Path
head = """\
/* DO NOT EDIT: Autogenerated by riscv-canonicalize-syscall-gen.py
Copyright (C) 2024-2025 Free Software Foundation, Inc.
This file is part of GDB.
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. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "riscv-linux-tdep.h"
/* riscv64_canonicalize_syscall maps from the native riscv 64 Linux set
of syscall ids into a canonical set of syscall ids used by
process record. */
enum gdb_syscall
riscv64_canonicalize_syscall (int syscall)
{
switch (syscall)
{
"""
tail = """\
default:
return gdb_sys_no_syscall;
}
}
"""
class Generator:
def _get_gdb_syscalls(self, gdb_syscalls_path: _Path) -> list[str]:
gdb_syscalls: list[str] = []
with open(gdb_syscalls_path, "r", encoding="UTF-8") as file:
lines = file.readlines()
for line in lines:
match = re.search(r"\s*(?P<name>gdb_sys_[^S]+)\S*=", line)
if match:
gdb_syscalls.append(match.group("name").strip())
return gdb_syscalls
def _get_canon_syscalls_lines(
self, syscalls_path: _Path, gdb_syscalls: list[str]
) -> list[str]:
canon_syscalls: dict[int, str] = {}
with open(syscalls_path, "r", encoding="UTF-8") as file:
lines = file.readlines()
for line in lines:
match = re.match(
r"#define\s+__NR_(?P<name>[^\s]+)\s+(?P<number>\d+)", line
)
if match:
syscall_name = match.group("name")
syscall_num = int(match.group("number"))
gdb_syscall_name = f"gdb_sys_{syscall_name}"
if gdb_syscall_name in gdb_syscalls:
value = f" case {syscall_num}: return {gdb_syscall_name};\n"
canon_syscalls[syscall_num] = value
# this is a place for corner cases
elif syscall_name == "mmap":
gdb_old_syscall_name = "gdb_sys_old_mmap"
value = (
f" case {syscall_num}: return {gdb_old_syscall_name};\n"
)
canon_syscalls[syscall_num] = value
else:
value = f" /* case {syscall_num}: return {gdb_syscall_name}; */\n"
canon_syscalls[syscall_num] = value
return [canon_syscalls[syscall_num] for syscall_num in sorted(canon_syscalls)]
def generate(self, syscalls_path: _Path) -> None:
repo_path = _Path(__file__).parent.parent.parent
gdb_syscalls_path = repo_path / "gdb" / "linux-record.h"
canon_syscalls_path = repo_path / "gdb" / "riscv-canonicalize-syscall-gen.c"
gdb_syscalls = self._get_gdb_syscalls(gdb_syscalls_path)
canon_syscalls_lines = self._get_canon_syscalls_lines(
syscalls_path, gdb_syscalls
)
with open(canon_syscalls_path, "w", encoding="UTF-8") as file:
file.writelines(head)
file.writelines(canon_syscalls_lines)
file.writelines(tail)
help_message = """\
Generate file gdb/riscv-canonicalize-syscall-gen.c
from path to riscv linux syscalls.
"""
def setup_parser() -> argparse.ArgumentParser:
parser = argparse.ArgumentParser(description=help_message)
parser.add_argument(
"-i",
"--input",
type=_Path,
required=True,
help="path to riscv linux syscalls (glibc/sysdeps/unix/sysv/linux/riscv/rv64/arch-syscall.h)",
)
return parser
def main(argv: list[str]) -> int:
try:
parser = setup_parser()
args = parser.parse_args(argv)
generator = Generator()
generator.generate(args.input)
return 0
except RuntimeError as e:
print(str(e))
return -1
if __name__ == "__main__":
sys.exit(main(sys.argv[1:]))
|
