1 files changed, 153 insertions, 0 deletions
diff --git a/gdb/syscalls/riscv-linux-canonicalize-syscall-gen.py b/gdb/syscalls/riscv-linux-canonicalize-syscall-gen.py
new file mode 100755
index 0000000..aaf3943
--- /dev/null
+++ b/gdb/syscalls/riscv-linux-canonicalize-syscall-gen.py
@@ -0,0 +1,153 @@
+#!/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()