1ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <stdio.h>
2ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <stdlib.h>
3ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include <signal.h>
4ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
5ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownstatic void handler(int sig, siginfo_t *info, void *v)
6ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{
7ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	printf("info: sig=%d code=%d addr=0x%lx\n",
8ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	       info->si_signo, info->si_code, (unsigned long)info->si_addr);
9ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	exit(0);
10ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown}
11ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
12ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownint main()
13ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{
14ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	struct sigaction sa;
15ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	int val;
16ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
17ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	sa.sa_sigaction = handler;
18ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	sigfillset(&sa.sa_mask);
19ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	sa.sa_flags = SA_SIGINFO;
20ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
21ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	sigaction(SIGSEGV, &sa, NULL);
22ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
23ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	asm volatile("mov %1, %%fs; mov %%fs:0, %0" : "=r" (val) : "r"(4));
24ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
25ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	printf("val=%d\n", val);
26ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown
27ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown	return 0;
28ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown}
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