tests/tcg/aarch64/pauth-1.c

   1 #include <assert.h>
   2 #include <sys/prctl.h>
   3 #include <stdio.h>
   4
   5 asm(".arch armv8.4-a");
   6
   7 #ifndef PR_PAC_RESET_KEYS
   8 #define PR_PAC_RESET_KEYS  54
   9 #define PR_PAC_APDAKEY     (1 << 2)
  10 #endif
  11
  12 #define TESTS 1000
  13
  14 int main()
  15 {
  16     int x, i, count = 0;
  17     void *p0 = &x, *p1, *p2;
  18     float perc;
  19
  20     for (i = 0; i < TESTS; i++) {
  21         asm volatile("pacdza %0" : "=r"(p1) : "0"(p0));
  22         prctl(PR_PAC_RESET_KEYS, PR_PAC_APDAKEY, 0, 0, 0);
  23         asm volatile("pacdza %0" : "=r"(p2) : "0"(p0));
  24
  25         if (p1 != p0) {
  26             count++;
  27         }
  28         if (p1 != p2) {
  29             count++;
  30         }
  31     }
  32
  33     perc = (float) count / (float) (TESTS * 2);
  34     printf("Ptr Check: %0.2f%%", perc * 100.0);
  35     assert(perc > 0.95);
  36     return 0;
  37 }