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 } 38