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Detect exit() from coroutine/fiber alternate stack and convert to emu quit #3571

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Detect exit() from coroutine/fiber alternate stack and convert to emu quit #3571

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13 changes: 13 additions & 0 deletions src/wrapped/wrappedlibc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4099,6 +4099,19 @@ EXPORT void my_exit(x64emu_t* emu, int code)
emu->flags.quitonexit = 2;
return;
}
if(emu->size_stack && emu->init_stack) {
uintptr_t sp = R_RSP;
uintptr_t stack_lo = (uintptr_t)emu->init_stack;
uintptr_t stack_hi = stack_lo + emu->size_stack;
if(sp < stack_lo || sp > stack_hi) {
printf_log(LOG_INFO, "exit(%d) called from alternate stack "
"(RSP=%p, main stack=%p--%p), converting to emu quit\n",
code, (void*)sp, (void*)stack_lo, (void*)stack_hi);
emu->quit = 1;
R_EAX = code;
return;
}
}
emu->quit = 1;
box64_exit_code = code;
endBox64();
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