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1 | #!/usr/bin/env python3 |
2 | # coding: utf-8 | |
3 | # | |
4 | # Probe gdb for supported architectures. | |
5 | # | |
6 | # This is required to support testing of the gdbstub as its hard to | |
7 | # handle errors gracefully during the test. Instead this script when | |
8 | # passed a GDB binary will probe its architecture support and return a | |
9 | # string of supported arches, stripped of guff. | |
10 | # | |
11 | # Copyright 2023 Linaro Ltd | |
12 | # | |
13 | # Author: Alex Bennée <alex.bennee@linaro.org> | |
14 | # | |
15 | # This work is licensed under the terms of the GNU GPL, version 2 or later. | |
16 | # See the COPYING file in the top-level directory. | |
17 | # | |
18 | # SPDX-License-Identifier: GPL-2.0-or-later | |
19 | ||
20 | import argparse | |
21 | import re | |
22 | from subprocess import check_output, STDOUT | |
23 | ||
24 | # mappings from gdb arch to QEMU target | |
25 | mappings = { | |
26 | "alpha" : "alpha", | |
27 | "aarch64" : ["aarch64", "aarch64_be"], | |
28 | "armv7": "arm", | |
29 | "armv8-a" : ["aarch64", "aarch64_be"], | |
30 | "avr" : "avr", | |
31 | "cris" : "cris", | |
32 | # no hexagon in upstream gdb | |
33 | "hppa1.0" : "hppa", | |
34 | "i386" : "i386", | |
35 | "i386:x86-64" : "x86_64", | |
36 | "Loongarch64" : "loongarch64", | |
37 | "m68k" : "m68k", | |
38 | "MicroBlaze" : "microblaze", | |
39 | "mips:isa64" : ["mips64", "mips64el"], | |
40 | "nios2" : "nios2", | |
41 | "or1k" : "or1k", | |
42 | "powerpc:common" : "ppc", | |
43 | "powerpc:common64" : ["ppc64", "ppc64le"], | |
44 | "riscv:rv32" : "riscv32", | |
45 | "riscv:rv64" : "riscv64", | |
46 | "s390:64-bit" : "s390x", | |
47 | "sh4" : ["sh4", "sh4eb"], | |
48 | "sparc": "sparc", | |
49 | "sparc:v8plus": "sparc32plus", | |
50 | "sparc:v9a" : "sparc64", | |
51 | # no tricore in upstream gdb | |
52 | "xtensa" : ["xtensa", "xtensaeb"] | |
53 | } | |
54 | ||
55 | def do_probe(gdb): | |
56 | gdb_out = check_output([gdb, | |
57 | "-ex", "set architecture", | |
58 | "-ex", "quit"], stderr=STDOUT) | |
59 | ||
60 | m = re.search(r"Valid arguments are (.*)", | |
61 | gdb_out.decode("utf-8")) | |
62 | ||
63 | valid_arches = set() | |
64 | ||
65 | if m.group(1): | |
66 | for arch in m.group(1).split(", "): | |
67 | if arch in mappings: | |
68 | mapping = mappings[arch] | |
69 | if isinstance(mapping, str): | |
70 | valid_arches.add(mapping) | |
71 | else: | |
72 | for entry in mapping: | |
73 | valid_arches.add(entry) | |
74 | ||
75 | return valid_arches | |
76 | ||
77 | def main() -> None: | |
78 | parser = argparse.ArgumentParser(description='Probe GDB Architectures') | |
79 | parser.add_argument('gdb', help='Path to GDB binary.') | |
80 | ||
81 | args = parser.parse_args() | |
82 | ||
83 | supported = do_probe(args.gdb) | |
84 | ||
85 | print(" ".join(supported)) | |
86 | ||
87 | if __name__ == '__main__': | |
88 | main() |