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/* $NetBSD: tramptest.c,v 1.1 2003/12/10 13:24:59 drochner Exp $ */
#include <stdlib.h>
#include <signal.h>
/*
* This test checks that the stack has no execute permission.
* It depends on the fact that gcc puts trampoline code for
* nested functions on the stack, at least on some architectures.
* (On the other architectures, the test will fail, as on platforms
* where execution permissions cannot be controlled.)
* Actually, it would be better if gcc wouldn't use stack trampolines,
* at all, but for now it allows for an easy portable check whether the
* stack is executable.
*/
void
__enable_execute_stack()
{
/* replace gcc's internal function by a noop */
}
void
buserr(int s)
{
exit(0);
}
void (*f)(void);
void do_f()
{
(*f)();
}
int
main()
{
void mist()
{
return;
}
signal(SIGBUS, buserr);
f = mist;
do_f();
exit(1);
}
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