pauth-1.c (729B)
1 #include <assert.h> 2 #include <sys/prctl.h> 3 #include <stdio.h> 4 5 #ifndef PR_PAC_RESET_KEYS 6 #define PR_PAC_RESET_KEYS 54 7 #define PR_PAC_APDAKEY (1 << 2) 8 #endif 9 10 #define TESTS 1000 11 12 int main() 13 { 14 int x, i, count = 0; 15 void *p0 = &x, *p1, *p2; 16 float perc; 17 18 for (i = 0; i < TESTS; i++) { 19 asm volatile("pacdza %0" : "=r"(p1) : "0"(p0)); 20 prctl(PR_PAC_RESET_KEYS, PR_PAC_APDAKEY, 0, 0, 0); 21 asm volatile("pacdza %0" : "=r"(p2) : "0"(p0)); 22 23 if (p1 != p0) { 24 count++; 25 } 26 if (p1 != p2) { 27 count++; 28 } 29 } 30 31 perc = (float) count / (float) (TESTS * 2); 32 printf("Ptr Check: %0.2f%%\n", perc * 100.0); 33 assert(perc > 0.95); 34 return 0; 35 }