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:]))