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sysemu/os-win32: fix setjmp/longjmp on windows-arm64

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Windows implementation of setjmp/longjmp is done in
C:/WINDOWS/system32/ucrtbase.dll. Alas, on arm64, it seems to *always*
perform stack unwinding, which crashes from generated code.

By using alternative implementation built in mingw, we avoid doing stack
unwinding and this fixes crash when calling longjmp.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230221153006.20300-3-pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Pierrick Bouvier 2023-02-21 16:30:04 +01:00 • committed by Richard Henderson
parent b3c3260295
commit dbd672c87f
2 changed files with 45 additions and 4 deletions
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21
meson.build
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@ -2466,6 +2466,27 @@ if targetos == 'windows'
}''', name: '_lock_file and _unlock_file'))
endif
if targetos == 'windows'
mingw_has_setjmp_longjmp = cc.links('''
#include <setjmp.h>
int main(void) {
/*
* These functions are not available in setjmp header, but may be
* available at link time, from libmingwex.a.
*/
extern int __mingw_setjmp(jmp_buf);
extern void __attribute__((noreturn)) __mingw_longjmp(jmp_buf, int);
jmp_buf env;
__mingw_setjmp(env);
__mingw_longjmp(env, 0);
}
''', name: 'mingw setjmp and longjmp')
if cpu == 'aarch64' and not mingw_has_setjmp_longjmp
error('mingw must provide setjmp/longjmp for windows-arm64')
endif
endif
########################
# Target configuration #
########################