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;
ill_handler(int sig)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
OPENSSL_cpuid_setup(void)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