diff options
author | Andy Polyakov <appro@openssl.org> | 2014-06-01 17:21:06 +0200 |
---|---|---|
committer | Andy Polyakov <appro@openssl.org> | 2014-06-10 23:20:55 +0200 |
commit | dabfbea7d91619b286e5d32ffc68ec7e5bd7e9bf (patch) | |
tree | 8818defbbd319f9bd338ffcf2ae17754233d4c7a /crypto | |
parent | 56d973709c02a1936ae35c40de56cff478713c45 (diff) |
Add linux-aarch64 taget.
armcap.c is shared between 32- and 64-bit builds and features link-time
detection of getauxval.
Submitted by: Ard Biesheuvel.
(cherry picked from commit e8d93e342b4b7d43c73e955e81e227c514d389d9)
Diffstat (limited to 'crypto')
-rw-r--r-- | crypto/arm64cpuid.S | 46 | ||||
-rw-r--r-- | crypto/arm_arch.h | 15 | ||||
-rw-r--r-- | crypto/armcap.c | 71 |
3 files changed, 121 insertions, 11 deletions
diff --git a/crypto/arm64cpuid.S b/crypto/arm64cpuid.S new file mode 100644 index 0000000000..4778ac1dea --- /dev/null +++ b/crypto/arm64cpuid.S @@ -0,0 +1,46 @@ +#include "arm_arch.h" + +.text +.arch armv8-a+crypto + +.align 5 +.global _armv7_neon_probe +.type _armv7_neon_probe,%function +_armv7_neon_probe: + orr v15.16b, v15.16b, v15.16b + ret +.size _armv7_neon_probe,.-_armv7_neon_probe + +.global _armv7_tick +.type _armv7_tick,%function +_armv7_tick: + mrs x0, CNTVCT_EL0 + ret +.size _armv7_tick,.-_armv7_tick + +.global _armv8_aes_probe +.type _armv8_aes_probe,%function +_armv8_aes_probe: + aese v0.16b, v0.16b + ret +.size _armv8_aes_probe,.-_armv8_aes_probe + +.global _armv8_sha1_probe +.type _armv8_sha1_probe,%function +_armv8_sha1_probe: + sha1h s0, s0 + ret +.size _armv8_sha1_probe,.-_armv8_sha1_probe + +.global _armv8_sha256_probe +.type _armv8_sha256_probe,%function +_armv8_sha256_probe: + sha256su0 v0.4s, v0.4s + ret +.size _armv8_sha256_probe,.-_armv8_sha256_probe +.global _armv8_pmull_probe +.type _armv8_pmull_probe,%function +_armv8_pmull_probe: + pmull v0.1q, v0.1d, v0.1d + ret +.size _armv8_pmull_probe,.-_armv8_pmull_probe diff --git a/crypto/arm_arch.h b/crypto/arm_arch.h index d68318c851..6fa87244d1 100644 --- a/crypto/arm_arch.h +++ b/crypto/arm_arch.h @@ -10,13 +10,24 @@ # define __ARMEL__ # endif # elif defined(__GNUC__) +# if defined(__aarch64__) +# define __ARM_ARCH__ 8 +# if __BYTE_ORDER__==__ORDER_BIG_ENDIAN__ +# define __ARMEB__ +# else +# define __ARMEL__ +# endif /* * Why doesn't gcc define __ARM_ARCH__? Instead it defines * bunch of below macros. See all_architectires[] table in * gcc/config/arm/arm.c. On a side note it defines * __ARMEL__/__ARMEB__ for little-/big-endian. */ -# if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || \ +# elif defined(__ARM_ARCH) +# define __ARM_ARCH__ __ARM_ARCH +# elif defined(__ARM_ARCH_8A__) +# define __ARM_ARCH__ 8 +# elif defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || \ defined(__ARM_ARCH_7R__)|| defined(__ARM_ARCH_7M__) || \ defined(__ARM_ARCH_7EM__) # define __ARM_ARCH__ 7 @@ -43,6 +54,7 @@ #if !__ASSEMBLER__ extern unsigned int OPENSSL_armcap_P; +#endif #define ARMV7_NEON (1<<0) #define ARMV7_TICK (1<<1) @@ -50,6 +62,5 @@ extern unsigned int OPENSSL_armcap_P; #define ARMV8_SHA1 (1<<3) #define ARMV8_SHA256 (1<<4) #define ARMV8_PMULL (1<<5) -#endif #endif diff --git a/crypto/armcap.c b/crypto/armcap.c index 550414425d..7e46d07a32 100644 --- a/crypto/armcap.c +++ b/crypto/armcap.c @@ -23,9 +23,9 @@ void _armv8_aes_probe(void); void _armv8_sha1_probe(void); void _armv8_sha256_probe(void); void _armv8_pmull_probe(void); -unsigned int _armv7_tick(void); +unsigned long _armv7_tick(void); -unsigned int OPENSSL_rdtsc(void) +unsigned long OPENSSL_rdtsc(void) { if (OPENSSL_armcap_P & ARMV7_TICK) return _armv7_tick(); @@ -33,9 +33,41 @@ unsigned int OPENSSL_rdtsc(void) return 0; } +/* + * 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 void OPENSSL_cpuid_setup(void) __attribute__((constructor)); +extern unsigned long getauxval(unsigned long type) __attribute__((weak)); +#else +static unsigned long (*getauxval)(unsigned long) = NULL; #endif + +/* + * ARM puts the 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; @@ -48,7 +80,7 @@ void OPENSSL_cpuid_setup(void) if ((e=getenv("OPENSSL_armcap"))) { - OPENSSL_armcap_P=strtoul(e,NULL,0); + OPENSSL_armcap_P=(unsigned int)strtoul(e,NULL,0); return; } @@ -68,12 +100,38 @@ void OPENSSL_cpuid_setup(void) sigprocmask(SIG_SETMASK,&ill_act.sa_mask,&oset); sigaction(SIGILL,&ill_act,&ill_oact); - if (sigsetjmp(ill_jmp,1) == 0) + 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; } @@ -87,11 +145,6 @@ void OPENSSL_cpuid_setup(void) _armv8_sha256_probe(); OPENSSL_armcap_P |= ARMV8_SHA256; } - if (sigsetjmp(ill_jmp,1) == 0) - { - _armv8_pmull_probe(); - OPENSSL_armcap_P |= ARMV8_PMULL; - } } if (sigsetjmp(ill_jmp,1) == 0) { |