diff options
author | Arne Schwabe <arne@rfc2549.org> | 2012-04-16 19:21:14 +0200 |
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committer | Arne Schwabe <arne@rfc2549.org> | 2012-04-16 19:21:14 +0200 |
commit | 3e4d8f433239c40311037616b1b8833a06651ae0 (patch) | |
tree | 98ab7fce0d011d34677b0beb762d389cb5c39199 /openssl/crypto/s390xcap.c |
Initial import
Diffstat (limited to 'openssl/crypto/s390xcap.c')
-rw-r--r-- | openssl/crypto/s390xcap.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/openssl/crypto/s390xcap.c b/openssl/crypto/s390xcap.c new file mode 100644 index 0000000..ffbe023 --- /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); + } |