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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#include <signal.h>
#include <crypto.h>
#include "arm_arch.h"
unsigned int OPENSSL_armcap_P;
static sigset_t all_masked;
static sigjmp_buf ill_jmp;
static void ill_handler (int sig) { siglongjmp(ill_jmp,sig); }
/*
* Following subroutines could have been inlined, but it's not all
* ARM compilers support inline assembler...
*/
void _armv7_neon_probe(void);
unsigned int _armv7_tick(void);
unsigned int OPENSSL_rdtsc(void)
{
if (OPENSSL_armcap_P & ARMV7_TICK)
return _armv7_tick();
else
return 0;
}
#if defined(__GNUC__) && __GNUC__>=2
void OPENSSL_cpuid_setup(void) __attribute__((constructor));
#endif
void OPENSSL_cpuid_setup(void)
{
char *e;
struct sigaction ill_oact,ill_act;
sigset_t oset;
static int trigger=0;
if (trigger) return;
trigger=1;
if ((e=getenv("OPENSSL_armcap")))
{
OPENSSL_armcap_P=strtoul(e,NULL,0);
return;
}
sigfillset(&all_masked);
sigdelset(&all_masked,SIGILL);
sigdelset(&all_masked,SIGTRAP);
sigdelset(&all_masked,SIGFPE);
sigdelset(&all_masked,SIGBUS);
sigdelset(&all_masked,SIGSEGV);
OPENSSL_armcap_P = 0;
memset(&ill_act,0,sizeof(ill_act));
ill_act.sa_handler = ill_handler;
ill_act.sa_mask = all_masked;
sigprocmask(SIG_SETMASK,&ill_act.sa_mask,&oset);
sigaction(SIGILL,&ill_act,&ill_oact);
if (sigsetjmp(ill_jmp,1) == 0)
{
_armv7_neon_probe();
OPENSSL_armcap_P |= ARMV7_NEON;
}
if (sigsetjmp(ill_jmp,1) == 0)
{
_armv7_tick();
OPENSSL_armcap_P |= ARMV7_TICK;
}
sigaction (SIGILL,&ill_oact,NULL);
sigprocmask(SIG_SETMASK,&oset,NULL);
}