1/* This testcase originally provoked an unaligned access fault on Alpha.
2
3   Since Digital Unix and Linux (and probably others) by default fix
4   these up in the kernel, the failure was not visible unless one
5   is sitting at the console examining logs.
6
7   So: If we know how, ask the kernel to deliver SIGBUS instead so
8   that the test case visibly fails.  */
9
10#if defined(__alpha__) && defined(__linux__)
11#include <asm/sysinfo.h>
12#include <asm/unistd.h>
13
14static inline int
15setsysinfo(unsigned long op, void *buffer, unsigned long size,
16           int *start, void *arg, unsigned long flag)
17{
18  syscall(__NR_osf_setsysinfo, op, buffer, size, start, arg, flag);
19}
20
21static void __attribute__((constructor))
22trap_unaligned(void)
23{
24  unsigned int buf[2];
25  buf[0] = SSIN_UACPROC;
26  buf[1] = UAC_SIGBUS | UAC_NOPRINT;
27  setsysinfo(SSI_NVPAIRS, buf, 1, 0, 0, 0);
28}
29#endif /* alpha */
30
31void foo(char *a, char *b) { }
32
33void showinfo()
34{
35    char uname[33] = "", tty[38] = "/dev/";
36    foo(uname, tty);
37}
38
39int main()
40{
41  showinfo ();
42  exit (0);
43}
44