1 /* 2 * Copyright 2010-2019 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include <stdlib.h> 12 #include <string.h> 13 #include <setjmp.h> 14 #include <signal.h> 15 #include "internal/cryptlib.h" 16 #include "s390x_arch.h" 17 18 static sigjmp_buf ill_jmp; 19 static void ill_handler(int sig) 20 { 21 siglongjmp(ill_jmp, sig); 22 } 23 24 void OPENSSL_s390x_facilities(void); 25 void OPENSSL_vx_probe(void); 26 27 struct OPENSSL_s390xcap_st OPENSSL_s390xcap_P; 28 29 void OPENSSL_cpuid_setup(void) 30 { 31 sigset_t oset; 32 struct sigaction ill_act, oact_ill, oact_fpe; 33 34 if (OPENSSL_s390xcap_P.stfle[0]) 35 return; 36 37 /* set a bit that will not be tested later */ 38 OPENSSL_s390xcap_P.stfle[0] |= S390X_CAPBIT(0); 39 40 memset(&ill_act, 0, sizeof(ill_act)); 41 ill_act.sa_handler = ill_handler; 42 sigfillset(&ill_act.sa_mask); 43 sigdelset(&ill_act.sa_mask, SIGILL); 44 sigdelset(&ill_act.sa_mask, SIGFPE); 45 sigdelset(&ill_act.sa_mask, SIGTRAP); 46 sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset); 47 sigaction(SIGILL, &ill_act, &oact_ill); 48 sigaction(SIGFPE, &ill_act, &oact_fpe); 49 50 /* protection against missing store-facility-list-extended */ 51 if (sigsetjmp(ill_jmp, 1) == 0) 52 OPENSSL_s390x_facilities(); 53 54 /* protection against disabled vector facility */ 55 if ((OPENSSL_s390xcap_P.stfle[2] & S390X_CAPBIT(S390X_VX)) 56 && (sigsetjmp(ill_jmp, 1) == 0)) { 57 OPENSSL_vx_probe(); 58 } else { 59 OPENSSL_s390xcap_P.stfle[2] &= ~(S390X_CAPBIT(S390X_VX) 60 | S390X_CAPBIT(S390X_VXD) 61 | S390X_CAPBIT(S390X_VXE)); 62 } 63 64 sigaction(SIGFPE, &oact_fpe, NULL); 65 sigaction(SIGILL, &oact_ill, NULL); 66 sigprocmask(SIG_SETMASK, &oset, NULL); 67 } 68