tests/tcg/aarch64/pcalign-a64.c

   1 /* Test PC misalignment exception */
   2
   3 #include <assert.h>
   4 #include <signal.h>
   5 #include <stdlib.h>
   6 #include <stdio.h>
   7
   8 static void *expected;
   9
  10 static void sigbus(int sig, siginfo_t *info, void *vuc)
  11 {
  12     assert(info->si_code == BUS_ADRALN);
  13     assert(info->si_addr == expected);
  14     exit(EXIT_SUCCESS);
  15 }
  16
  17 int main()
  18 {
  19     void *tmp;
  20
  21     struct sigaction sa = {
  22         .sa_sigaction = sigbus,
  23         .sa_flags = SA_SIGINFO
  24     };
  25
  26     if (sigaction(SIGBUS, &sa, NULL) < 0) {
  27         perror("sigaction");
  28         return EXIT_FAILURE;
  29     }
  30
  31     asm volatile("adr %0, 1f + 1\n\t"
  32                  "str %0, %1\n\t"
  33                  "br  %0\n"
  34                  "1:"
  35                  : "=&r"(tmp), "=m"(expected));
  36     abort();
  37 }