diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/armcap.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/armcap.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/armcap.c b/openssl-1.1.0h/crypto/armcap.c new file mode 100644 index 0000000..432a06c --- /dev/null +++ b/openssl-1.1.0h/crypto/armcap.c @@ -0,0 +1,193 @@ +/* + * Copyright 2011-2017 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <setjmp.h> +#include <signal.h> +#include <openssl/crypto.h> + +#include "arm_arch.h" + +unsigned int OPENSSL_armcap_P = 0; + +#if __ARM_MAX_ARCH__<7 +void OPENSSL_cpuid_setup(void) +{ +} + +unsigned long OPENSSL_rdtsc(void) +{ + return 0; +} +#else +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); +void _armv8_aes_probe(void); +void _armv8_sha1_probe(void); +void _armv8_sha256_probe(void); +void _armv8_pmull_probe(void); +unsigned long _armv7_tick(void); + +unsigned long 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 +/* + * 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; +# endif + +/* + * ARM puts the feature bits for Crypto Extensions in AT_HWCAP2, whereas + * AArch64 used AT_HWCAP. + */ +# if defined(__arm__) || defined (__arm) +# define HWCAP 16 + /* AT_HWCAP */ +# define HWCAP_NEON (1 << 12) + +# define HWCAP_CE 26 + /* AT_HWCAP2 */ +# define HWCAP_CE_AES (1 << 0) +# define HWCAP_CE_PMULL (1 << 1) +# define HWCAP_CE_SHA1 (1 << 2) +# define HWCAP_CE_SHA256 (1 << 3) +# elif defined(__aarch64__) +# define HWCAP 16 + /* AT_HWCAP */ +# define HWCAP_NEON (1 << 1) + +# define HWCAP_CE HWCAP +# define HWCAP_CE_AES (1 << 3) +# define HWCAP_CE_PMULL (1 << 4) +# define HWCAP_CE_SHA1 (1 << 5) +# define HWCAP_CE_SHA256 (1 << 6) +# 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 = (unsigned int)strtoul(e, NULL, 0); + return; + } + +# if defined(__APPLE__) && !defined(__aarch64__) + /* + * Capability probing by catching SIGILL appears to be problematic + * on iOS. But since Apple universe is "monocultural", it's actually + * possible to simply set pre-defined processor capability mask. + */ + if (1) { + OPENSSL_armcap_P = ARMV7_NEON; + return; + } + /* + * One could do same even for __aarch64__ iOS builds. It's not done + * exclusively for reasons of keeping code unified across platforms. + * Unified code works because it never triggers SIGILL on Apple + * devices... + */ +# endif + + 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 (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; + } + } else if (sigsetjmp(ill_jmp, 1) == 0) { + _armv7_neon_probe(); + OPENSSL_armcap_P |= ARMV7_NEON; + 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; + } + } + if (sigsetjmp(ill_jmp, 1) == 0) { + _armv7_tick(); + OPENSSL_armcap_P |= ARMV7_TICK; + } + + sigaction(SIGILL, &ill_oact, NULL); + sigprocmask(SIG_SETMASK, &oset, NULL); +} +#endif |