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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, CalledProcessError
import sys
# Mappings from gdb arch to QEMU target
MAP = {
"alpha" : ["alpha"],
"aarch64" : ["aarch64", "aarch64_be"],
"armv7": ["arm"],
"armv8-a" : ["aarch64", "aarch64_be"],
"avr" : ["avr"],
# 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"],
"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):
try:
gdb_out = check_output([gdb,
"-ex", "set architecture",
"-ex", "quit"], stderr=STDOUT, encoding="utf-8")
except (OSError) as e:
sys.exit(e)
except CalledProcessError as e:
sys.exit(f'{e}. Output:\n\n{e.output}')
found_gdb_archs = re.search(r'Valid arguments are (.*)', gdb_out)
targets = set()
if found_gdb_archs:
gdb_archs = found_gdb_archs.group(1).split(", ")
mapped_gdb_archs = [arch for arch in gdb_archs if arch in MAP]
targets = {target for arch in mapped_gdb_archs for target in MAP[arch]}
# QEMU targets
return targets
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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