qemu

FORK: QEMU emulator
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pcalign-a64.c (729B)

      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 }