tests/tcg/aarch64/mte-6.c

   1 #include "mte.h"
   2
   3 void pass(int sig, siginfo_t *info, void *uc)
   4 {
   5     assert(info->si_code == SEGV_MTESERR);
   6     exit(0);
   7 }
   8
   9 int main(void)
  10 {
  11     enable_mte(PR_MTE_TCF_SYNC);
  12
  13     void *brk = sbrk(16);
  14     if (brk == (void *)-1) {
  15         perror("sbrk");
  16         return 2;
  17     }
  18
  19     if (mprotect(brk, 16, PROT_READ | PROT_WRITE | PROT_MTE)) {
  20         perror("mprotect");
  21         return 2;
  22     }
  23
  24     int *p1, *p2;
  25     long excl = 1;
  26
  27     asm("irg %0,%1,%2" : "=r"(p1) : "r"(brk), "r"(excl));
  28     asm("gmi %0,%1,%0" : "+r"(excl) : "r"(p1));
  29     asm("irg %0,%1,%2" : "=r"(p2) : "r"(brk), "r"(excl));
  30     asm("stg %0,[%0]" : : "r"(p1));
  31
  32     *p1 = 0;
  33
  34     struct sigaction sa;
  35     memset(&sa, 0, sizeof(sa));
  36     sa.sa_sigaction = pass;
  37     sa.sa_flags = SA_SIGINFO;
  38     sigaction(SIGSEGV, &sa, NULL);
  39
  40     *p2 = 0;
  41
  42     abort();
  43 }