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Diffstat (limited to 'openssl/crypto/s390xcap.c')
-rw-r--r--openssl/crypto/s390xcap.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/openssl/crypto/s390xcap.c b/openssl/crypto/s390xcap.c
new file mode 100644
index 00000000..ffbe0235
--- /dev/null
+++ b/openssl/crypto/s390xcap.c
@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <setjmp.h>
+#include <signal.h>
+
+extern unsigned long OPENSSL_s390xcap_P;
+
+static sigjmp_buf ill_jmp;
+static void ill_handler (int sig) { siglongjmp(ill_jmp,sig); }
+
+unsigned long OPENSSL_s390x_facilities(void);
+
+void OPENSSL_cpuid_setup(void)
+ {
+ sigset_t oset;
+ struct sigaction ill_act,oact;
+
+ if (OPENSSL_s390xcap_P) return;
+
+ memset(&ill_act,0,sizeof(ill_act));
+ ill_act.sa_handler = ill_handler;
+ sigfillset(&ill_act.sa_mask);
+ sigdelset(&ill_act.sa_mask,SIGILL);
+ sigdelset(&ill_act.sa_mask,SIGTRAP);
+ sigprocmask(SIG_SETMASK,&ill_act.sa_mask,&oset);
+ sigaction (SIGILL,&ill_act,&oact);
+
+ /* protection against missing store-facility-list-extended */
+ if (sigsetjmp(ill_jmp,0) == 0)
+ OPENSSL_s390xcap_P = OPENSSL_s390x_facilities();
+ else
+ OPENSSL_s390xcap_P = 1UL<<63;
+
+ sigaction (SIGILL,&oact,NULL);
+ sigprocmask(SIG_SETMASK,&oset,NULL);
+ }