check_settls1.c (937B)
1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <errno.h> 4 #include <unistd.h> 5 6 #include <sys/syscall.h> 7 8 #ifndef SYS_set_thread_area 9 #define SYS_set_thread_area 243 10 #endif 11 12 int main (void) 13 { 14 unsigned long tp, old_tp; 15 int ret; 16 17 asm volatile ("move $pid,%0" : "=r" (old_tp)); 18 old_tp &= ~0xff; 19 20 ret = syscall (SYS_set_thread_area, 0xf0); 21 if (ret != -1 || errno != EINVAL) { 22 syscall (SYS_set_thread_area, old_tp); 23 perror ("Invalid thread area accepted:"); 24 abort(); 25 } 26 27 ret = syscall (SYS_set_thread_area, 0xeddeed00); 28 if (ret != 0) { 29 perror ("Valid thread area not accepted: "); 30 abort (); 31 } 32 33 asm volatile ("move $pid,%0" : "=r" (tp)); 34 tp &= ~0xff; 35 syscall (SYS_set_thread_area, old_tp); 36 37 if (tp != 0xeddeed00) { 38 * (volatile int *) 0 = 0; 39 perror ("tls2"); 40 abort (); 41 } 42 43 printf ("pass\n"); 44 return EXIT_SUCCESS; 45 }