mirror of
https://github.com/openssl/openssl.git
synced 2024-12-03 05:41:46 +08:00
78 lines
1.5 KiB
C
78 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <crypto.h>
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#include "arm_arch.h"
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unsigned int OPENSSL_armcap_P;
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static sigset_t all_masked;
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static sigjmp_buf ill_jmp;
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static void ill_handler (int sig) { siglongjmp(ill_jmp,sig); }
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/*
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* Following subroutines could have been inlined, but it's not all
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* ARM compilers support inline assembler...
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*/
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void _armv7_neon_probe(void);
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unsigned int _armv7_tick(void);
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unsigned int OPENSSL_rdtsc(void)
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{
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if (OPENSSL_armcap_P|ARMV7_TICK)
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return _armv7_tick();
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else
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return 0;
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}
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void OPENSSL_cpuid_setup(void)
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{
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char *e;
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struct sigaction ill_oact,ill_act;
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sigset_t oset;
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static int trigger=0;
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if (trigger) return;
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trigger=1;
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if ((e=getenv("OPENSSL_armcap")))
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{
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OPENSSL_armcap_P=strtoul(e,NULL,0);
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return;
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}
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sigfillset(&all_masked);
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sigdelset(&all_masked,SIGILL);
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sigdelset(&all_masked,SIGTRAP);
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sigdelset(&all_masked,SIGFPE);
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sigdelset(&all_masked,SIGBUS);
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sigdelset(&all_masked,SIGSEGV);
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OPENSSL_armcap_P = 0;
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memset(&ill_act,0,sizeof(ill_act));
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ill_act.sa_handler = ill_handler;
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ill_act.sa_mask = all_masked;
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sigprocmask(SIG_SETMASK,&ill_act.sa_mask,&oset);
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sigaction(SIGILL,&ill_act,&ill_oact);
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if (sigsetjmp(ill_jmp,1) == 0)
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{
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_armv7_neon_probe();
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OPENSSL_armcap_P |= ARMV7_NEON;
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}
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if (sigsetjmp(ill_jmp,1) == 0)
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{
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_armv7_tick();
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OPENSSL_armcap_P |= ARMV7_TICK;
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}
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sigaction (SIGILL,&ill_oact,NULL);
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sigprocmask(SIG_SETMASK,&oset,NULL);
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}
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