#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <setjmp.h>
#include <sys/mman.h>

void *faultAddress = 0;
jmp_buf env;


void getFaultAddress(int signo, struct siginfo *info, void *data)
{
	faultAddress = info->si_addr;
	longjmp(env, 1);
}

int main()
{
	long *l;
	struct sigaction sa;
	sa.sa_sigaction = getFaultAddress;
	sa.sa_flags = SA_SIGINFO | SA_ONESHOT;
	l = (long *)mmap(0,4096, PROT_READ, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
	printf("Read only write address = %08x\n", l);
	sigaction(SIGSEGV, &sa, NULL);
	if (!setjmp(env))
		l[0] = 1;
	else 
		printf("fault address = %08x\n", faultAddress);
	l = (long *)mmap(0,8192, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
	l[0] = 2;
	l[1024] = 3;
	l = (long *)(((char *)l)+1);
	printf("Unaligned write address = %08x\n", l);
	sigaction(SIGBUS, &sa, NULL);
	__asm__ __volatile__("pushfl\n\t"
			     "orl $0x40000,(%esp)\n\t"
			     "popfl");
	if (!setjmp(env)) 
		l[0] = 4;
	else
		printf("fault address = %08x\n", faultAddress);
}