1 /* zArchitecture specifies that operation exception(illegal opcode) is
2 suppressing. That means that the program check old psw will point to
3 the instruction after the illegal one (according to the calculated length).
4 There are some programs out there that use this mechanism to detect available
5 instruction (sigh).
6 This patch checks, that valgrind makes forard progress. */
7 #include <signal.h>
8 #include <stdio.h>
9 #include <string.h>
10 static volatile int got_ill;
handle_ill(int sig)11 static void handle_ill(int sig)
12 {
13 got_ill = 1;
14 }
main()15 int main()
16 {
17 struct sigaction sa;
18
19 memset(&sa, 0, sizeof(sa));
20 sa.sa_handler = handle_ill;
21 sigaction(SIGILL, &sa, NULL);
22
23 got_ill = 0;
24 /* most architectures loop here, but on s390 this would increase the
25 PSW by 2 and then by 2 */
26 asm volatile(".long 0\n");
27 if (got_ill)
28 printf("0x00000000 does not loop\n");
29
30 got_ill = 0;
31 /* most architectures loop here, but on s390 this would increase the
32 PSW by 6 and then by 2*/
33 asm volatile(".long 0xffffffff\n.long 0xffff0000\n");
34 if (got_ill)
35 printf("0xffffffff does not loop\n");
36 return 0;
37 }
38
39