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Diffstat (limited to 'gdb/syscalls/riscv-canonicalize-syscall-gen.py')
| -rwxr-xr-x | gdb/syscalls/riscv-canonicalize-syscall-gen.py | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/gdb/syscalls/riscv-canonicalize-syscall-gen.py b/gdb/syscalls/riscv-canonicalize-syscall-gen.py new file mode 100755 index 0000000..aa07ac1 --- /dev/null +++ b/gdb/syscalls/riscv-canonicalize-syscall-gen.py @@ -0,0 +1,163 @@ +#!/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 (riscv-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_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 (riscv-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:])) |