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#include <sys/types.h>
#include <sys/signal.h>
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#define FAULTADDR 0x123123
static void
handler(int sig, siginfo_t *sip, void *scp)
{
char buf[1024];
if (sip == NULL)
_exit(1);
if (sip->si_addr == 0) /* wrong address */
_exit(1);
// snprintf(buf, sizeof buf, "addr %p\n", sip->si_addr);
// write(STDOUT_FILENO, buf, strlen(buf));
_exit(0);
}
int
main(int argc, char *argv[])
{
struct sigaction sa;
memset(&sa, 0, sizeof sa);
sigfillset(&sa.sa_mask);
sa.sa_sigaction = handler;
sa.sa_flags = SA_SIGINFO;
sigaction(SIGSEGV, &sa, NULL);
sigaction(SIGBUS, &sa, NULL);
*(char *)FAULTADDR = 0;
}
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