| #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); |
| } |