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/* $OpenBSD: s390xcap.c,v 1.3 2014/06/12 15:49:27 deraadt Exp $ */
#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[0])
return;
OPENSSL_s390xcap_P[0] = 1UL << (8*sizeof(unsigned long) - 1);
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, 1) == 0)
OPENSSL_s390x_facilities();
sigaction (SIGILL, &oact, NULL);
sigprocmask(SIG_SETMASK, &oset, NULL);
}
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