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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);
- void _armv8_aes_probe(void);
- void _armv8_sha1_probe(void);
- void _armv8_sha256_probe(void);
- void _armv8_pmull_probe(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;
- #ifdef __aarch64__
- if (sigsetjmp(ill_jmp,1) == 0)
- {
- _armv8_pmull_probe();
- OPENSSL_armcap_P |= ARMV8_PMULL|ARMV8_AES;
- }
- else if (sigsetjmp(ill_jmp,1) == 0)
- {
- _armv8_aes_probe();
- OPENSSL_armcap_P |= ARMV8_AES;
- }
- if (sigsetjmp(ill_jmp,1) == 0)
- {
- _armv8_sha1_probe();
- OPENSSL_armcap_P |= ARMV8_SHA1;
- }
- if (sigsetjmp(ill_jmp,1) == 0)
- {
- _armv8_sha256_probe();
- OPENSSL_armcap_P |= ARMV8_SHA256;
- }
- #endif
- }
- if (sigsetjmp(ill_jmp,1) == 0)
- {
- _armv7_tick();
- OPENSSL_armcap_P |= ARMV7_TICK;
- }
- sigaction (SIGILL,&ill_oact,NULL);
- sigprocmask(SIG_SETMASK,&oset,NULL);
- }
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