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#!/usr/bin/env python3
# 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-linux-canonicalize-syscall-gen.py --help
# Execution result:
# usage: riscv-linux-canonicalize-syscall-gen.py [-h]
#
# Generate file gdb/riscv-linux-canonicalize-syscall-gen.c from
# gdb/syscalls/riscv-linux.xml.
#
# options:
# -h, --help show this help message and exit
import argparse
import re
import xml.etree.ElementTree as ET
from pathlib import Path
FILE = Path(__file__).resolve()
HEAD = f"""\
/* DO NOT EDIT: Autogenerated by {FILE.name}
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"
/* riscv_linux_canonicalize_syscall maps from the native RISC-V Linux set
of syscall ids into a canonical set of syscall ids used by
process record. */
enum gdb_syscall
riscv_linux_canonicalize_syscall (int syscall)
{{
switch (syscall)
{{
"""
TAIL = """\
default:
return gdb_sys_no_syscall;
}
}
"""
HELP_MESSAGE = """\
Generate file gdb/riscv-linux-canonicalize-syscall-gen.c from
gdb/syscalls/riscv-linux.xml.
"""
class Generator:
def _get_gdb_syscalls(self, gdb_syscalls_path: Path) -> set[str]:
gdb_syscalls = set[str]()
with open(gdb_syscalls_path, "r", encoding="UTF-8") as file:
for line in file:
match = re.search(r"(gdb_sys_\S+)\s*=", line)
if match:
gdb_syscalls.add(match[1].strip())
return gdb_syscalls
def _get_arch_syscalls(self, xml_syscalls_path: Path) -> dict[str, int]:
arch_syscalls: dict[str, int] = {}
syscalls_info = ET.parse(xml_syscalls_path)
for syscall in syscalls_info.findall("syscall"):
sysname = syscall.attrib["name"]
sysno = int(syscall.attrib["number"])
arch_syscalls[sysname] = sysno
return arch_syscalls
def _get_canon_syscalls_lines(
self,
arch_syscalls: dict[str, int],
gdb_syscalls: set[str],
exceptions: dict[str, str],
) -> list[str]:
canon_syscalls: dict[int, str] = {}
for sysname, sysno in arch_syscalls.items():
if sysname in exceptions:
sysname = exceptions[sysname]
gdb_sysname = f"gdb_sys_{sysname}"
value = f" /* case {sysno}: return {gdb_sysname}; */\n"
if gdb_sysname in gdb_syscalls:
value = f" case {sysno}: return {gdb_sysname};\n"
canon_syscalls[sysno] = value
return [canon_syscalls[sysno] for sysno in sorted(canon_syscalls)]
def generate(self) -> None:
repo_path = FILE.parent.parent.parent
gdb_path = repo_path / "gdb"
xml_syscalls_path = gdb_path / "syscalls" / "riscv-linux.xml"
gdb_syscalls_path = gdb_path / "linux-record.h"
arch_syscalls_path = gdb_path / "riscv-linux-canonicalize-syscall-gen.c"
exceptions = {"mmap": "old_mmap"}
arch_syscalls = self._get_arch_syscalls(xml_syscalls_path)
gdb_syscalls = self._get_gdb_syscalls(gdb_syscalls_path)
canon_syscalls_lines = self._get_canon_syscalls_lines(
arch_syscalls, gdb_syscalls, exceptions
)
with open(arch_syscalls_path, "w", encoding="UTF-8") as file:
file.writelines(HEAD)
file.writelines(canon_syscalls_lines)
file.writelines(TAIL)
def main() -> int:
parser = argparse.ArgumentParser(description=HELP_MESSAGE)
parser.parse_args()
Generator().generate()
return 0
if __name__ == "__main__":
main()
|
