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This patch adds a plugin API function that allows diverting the program counter during execution. A potential use case for this functionality is to skip over parts of the code, e.g., by hooking into a specific instruction and setting the PC to the next instruction in the callback. Link: https://lists.nongnu.org/archive/html/qemu-devel/2025-08/msg00656.html Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Signed-off-by: Florian Hofhammer <florian.hofhammer@epfl.ch> Link: https://lore.kernel.org/qemu-devel/20260305-setpc-v5-v7-4-4c3adba52403@epfl.ch Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
#!/usr/bin/env python3
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#
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# Extract QEMU Plugin API symbols from a header file
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#
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# Copyright 2024 Linaro Ltd
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#
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# Author: Pierrick Bouvier <pierrick.bouvier@linaro.org>
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#
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# This work is licensed under the terms of the GNU GPL, version 2 or later.
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# See the COPYING file in the top-level directory.
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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import argparse
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import re
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def extract_symbols(plugin_header):
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with open(plugin_header) as file:
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content = file.read()
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# Remove QEMU_PLUGIN_API macro definition.
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content = content.replace('#define QEMU_PLUGIN_API', '')
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expected = content.count('QEMU_PLUGIN_API')
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# Find last word between QEMU_PLUGIN_API and ( to get the function name,
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# matching on several lines. Discard attributes, if any.
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# We use *? non-greedy quantifier.
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syms = re.findall(
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r'QEMU_PLUGIN_API\s+(?:__attribute__\(\(\S+\)\))?.*?(\w+)\s*\(',
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content,
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re.DOTALL,
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)
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syms.sort()
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# Ensure we found as many symbols as API markers.
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assert len(syms) == expected
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return syms
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def main() -> None:
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parser = argparse.ArgumentParser(description='Extract QEMU plugin symbols')
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parser.add_argument('plugin_header', help='Path to QEMU plugin header.')
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args = parser.parse_args()
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syms = extract_symbols(args.plugin_header)
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print('{')
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for s in syms:
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print(" {};".format(s))
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print('};')
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if __name__ == '__main__':
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main()
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