81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
#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);
|
|
}
|