s390xcap.c revision 296341
1#include <stdio.h> 2#include <stdlib.h> 3#include <string.h> 4#include <setjmp.h> 5#include <signal.h> 6 7extern unsigned long OPENSSL_s390xcap_P[]; 8 9static sigjmp_buf ill_jmp; 10static void ill_handler(int sig) 11{ 12 siglongjmp(ill_jmp, sig); 13} 14 15unsigned long OPENSSL_s390x_facilities(void); 16 17void OPENSSL_cpuid_setup(void) 18{ 19 sigset_t oset; 20 struct sigaction ill_act, oact; 21 22 if (OPENSSL_s390xcap_P[0]) 23 return; 24 25 OPENSSL_s390xcap_P[0] = 1UL << (8 * sizeof(unsigned long) - 1); 26 27 memset(&ill_act, 0, sizeof(ill_act)); 28 ill_act.sa_handler = ill_handler; 29 sigfillset(&ill_act.sa_mask); 30 sigdelset(&ill_act.sa_mask, SIGILL); 31 sigdelset(&ill_act.sa_mask, SIGTRAP); 32 sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset); 33 sigaction(SIGILL, &ill_act, &oact); 34 35 /* protection against missing store-facility-list-extended */ 36 if (sigsetjmp(ill_jmp, 1) == 0) 37 OPENSSL_s390x_facilities(); 38 39 sigaction(SIGILL, &oact, NULL); 40 sigprocmask(SIG_SETMASK, &oset, NULL); 41} 42