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81 lines
1.7 KiB
81 lines
1.7 KiB
#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) |
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{ |
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siglongjmp(ill_jmp, sig); |
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} |
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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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#if defined(__GNUC__) && __GNUC__>=2 |
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void OPENSSL_cpuid_setup(void) __attribute__ ((constructor)); |
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#endif |
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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) |
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return; |
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trigger = 1; |
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if ((e = getenv("OPENSSL_armcap"))) { |
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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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_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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_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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