diff options
Diffstat (limited to 'crypto/armcap.c')
| -rw-r--r-- | crypto/armcap.c | 77 |
1 files changed, 41 insertions, 36 deletions
diff --git a/crypto/armcap.c b/crypto/armcap.c index e97bdd147d..70d2719ba7 100644 --- a/crypto/armcap.c +++ b/crypto/armcap.c @@ -62,14 +62,12 @@ uint32_t OPENSSL_rdtsc(void) # if defined(__GNUC__) && __GNUC__>=2 void OPENSSL_cpuid_setup(void) __attribute__ ((constructor)); # endif -/* - * Use a weak reference to getauxval() so we can use it if it is available but - * don't break the build if it is not. - */ -# if defined(__GNUC__) && __GNUC__>=2 && defined(__ELF__) -extern unsigned long getauxval(unsigned long type) __attribute__ ((weak)); -# else -static unsigned long (*getauxval) (unsigned long) = NULL; + +# if defined(__GLIBC__) && defined(__GLIBC_PREREQ) +# if __GLIBC_PREREQ(2, 16) +# include <sys/auxv.h> +# define OSSL_IMPLEMENT_GETAUXVAL +# endif # endif /* @@ -134,6 +132,33 @@ void OPENSSL_cpuid_setup(void) */ # endif + OPENSSL_armcap_P = 0; + +# ifdef OSSL_IMPLEMENT_GETAUXVAL + if (getauxval(HWCAP) & HWCAP_NEON) { + unsigned long hwcap = getauxval(HWCAP_CE); + + OPENSSL_armcap_P |= ARMV7_NEON; + + if (hwcap & HWCAP_CE_AES) + OPENSSL_armcap_P |= ARMV8_AES; + + if (hwcap & HWCAP_CE_PMULL) + OPENSSL_armcap_P |= ARMV8_PMULL; + + if (hwcap & HWCAP_CE_SHA1) + OPENSSL_armcap_P |= ARMV8_SHA1; + + if (hwcap & HWCAP_CE_SHA256) + OPENSSL_armcap_P |= ARMV8_SHA256; + +# ifdef __aarch64__ + if (hwcap & HWCAP_CE_SHA512) + OPENSSL_armcap_P |= ARMV8_SHA512; +# endif + } +# endif + sigfillset(&all_masked); sigdelset(&all_masked, SIGILL); sigdelset(&all_masked, SIGTRAP); @@ -141,8 +166,6 @@ void OPENSSL_cpuid_setup(void) 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; @@ -150,30 +173,9 @@ void OPENSSL_cpuid_setup(void) sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset); sigaction(SIGILL, &ill_act, &ill_oact); - if (getauxval != NULL) { - if (getauxval(HWCAP) & HWCAP_NEON) { - unsigned long hwcap = getauxval(HWCAP_CE); - - OPENSSL_armcap_P |= ARMV7_NEON; - - if (hwcap & HWCAP_CE_AES) - OPENSSL_armcap_P |= ARMV8_AES; - - if (hwcap & HWCAP_CE_PMULL) - OPENSSL_armcap_P |= ARMV8_PMULL; - - if (hwcap & HWCAP_CE_SHA1) - OPENSSL_armcap_P |= ARMV8_SHA1; - - if (hwcap & HWCAP_CE_SHA256) - OPENSSL_armcap_P |= ARMV8_SHA256; - -# ifdef __aarch64__ - if (hwcap & HWCAP_CE_SHA512) - OPENSSL_armcap_P |= ARMV8_SHA512; -# endif - } - } else if (sigsetjmp(ill_jmp, 1) == 0) { + /* If we used getauxval, we already have all the values */ +# ifndef OSSL_IMPLEMENT_GETAUXVAL + if (sigsetjmp(ill_jmp, 1) == 0) { _armv7_neon_probe(); OPENSSL_armcap_P |= ARMV7_NEON; if (sigsetjmp(ill_jmp, 1) == 0) { @@ -191,13 +193,16 @@ void OPENSSL_cpuid_setup(void) _armv8_sha256_probe(); OPENSSL_armcap_P |= ARMV8_SHA256; } -# if defined(__aarch64__) && !defined(__APPLE__) +# if defined(__aarch64__) && !defined(__APPLE__) if (sigsetjmp(ill_jmp, 1) == 0) { _armv8_sha512_probe(); OPENSSL_armcap_P |= ARMV8_SHA512; } -# endif +# endif } +# endif + + /* Things that getauxval didn't tell us */ if (sigsetjmp(ill_jmp, 1) == 0) { _armv7_tick(); OPENSSL_armcap_P |= ARMV7_TICK; |