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#!/usr/bin/env python3
# coding: utf-8
#
# Probe gdb for supported architectures.
#
# This is required to support testing of the gdbstub as its hard to
# handle errors gracefully during the test. Instead this script when
# passed a GDB binary will probe its architecture support and return a
# string of supported arches, stripped of guff.
#
# Copyright 2023 Linaro Ltd
#
# Author: Alex Bennée <alex.bennee@linaro.org>
#
# This work is licensed under the terms of the GNU GPL, version 2 or later.
# See the COPYING file in the top-level directory.
#
# SPDX-License-Identifier: GPL-2.0-or-later
import argparse
import re
from subprocess import check_output, STDOUT
# mappings from gdb arch to QEMU target
mappings = {
"alpha" : "alpha",
"aarch64" : ["aarch64", "aarch64_be"],
"armv7": "arm",
"armv8-a" : ["aarch64", "aarch64_be"],
"avr" : "avr",
"cris" : "cris",
# no hexagon in upstream gdb
"hppa1.0" : "hppa",
"i386" : "i386",
"i386:x86-64" : "x86_64",
"Loongarch64" : "loongarch64",
"m68k" : "m68k",
"MicroBlaze" : "microblaze",
"mips:isa64" : ["mips64", "mips64el"],
"nios2" : "nios2",
"or1k" : "or1k",
"powerpc:common" : "ppc",
"powerpc:common64" : ["ppc64", "ppc64le"],
"riscv:rv32" : "riscv32",
"riscv:rv64" : "riscv64",
"s390:64-bit" : "s390x",
"sh4" : ["sh4", "sh4eb"],
"sparc": "sparc",
"sparc:v8plus": "sparc32plus",
"sparc:v9a" : "sparc64",
# no tricore in upstream gdb
"xtensa" : ["xtensa", "xtensaeb"]
}
def do_probe(gdb):
gdb_out = check_output([gdb,
"-ex", "set architecture",
"-ex", "quit"], stderr=STDOUT)
m = re.search(r"Valid arguments are (.*)",
gdb_out.decode("utf-8"))
valid_arches = set()
if m.group(1):
for arch in m.group(1).split(", "):
if arch in mappings:
mapping = mappings[arch]
if isinstance(mapping, str):
valid_arches.add(mapping)
else:
for entry in mapping:
valid_arches.add(entry)
return valid_arches
def main() -> None:
parser = argparse.ArgumentParser(description='Probe GDB Architectures')
parser.add_argument('gdb', help='Path to GDB binary.')
args = parser.parse_args()
supported = do_probe(args.gdb)
print(" ".join(supported))
if __name__ == '__main__':
main()
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