+/*
+ * Copyright 2011-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (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 <crypto.h>
+#include <openssl/crypto.h>
+#include "internal/cryptlib.h"
#include "arm_arch.h"
-unsigned int OPENSSL_armcap_P;
+unsigned int OPENSSL_armcap_P = 0;
+
+#if __ARM_MAX_ARCH__<7
+void OPENSSL_cpuid_setup(void)
+{
+}
+uint32_t 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); }
+static void ill_handler(int sig)
+{
+ siglongjmp(ill_jmp, sig);
+}
/*
* Following subroutines could have been inlined, but it's not all
void _armv8_sha1_probe(void);
void _armv8_sha256_probe(void);
void _armv8_pmull_probe(void);
-unsigned int _armv7_tick(void);
-
-unsigned int 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
+# ifdef __aarch64__
+void _armv8_sha512_probe(void);
+# endif
+uint32_t _armv7_tick(void);
+
+uint32_t 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
+
+# if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
+# if __GLIBC_PREREQ(2, 16)
+# include <sys/auxv.h>
+# define OSSL_IMPLEMENT_GETAUXVAL
+# endif
+# 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)
+# define HWCAP_CE_SHA512 (1 << 21)
+# 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=strtoul(e,NULL,0);
- return;
- }
-
- 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 (sigsetjmp(ill_jmp,1) == 0)
- {
- _armv7_neon_probe();
- OPENSSL_armcap_P |= ARMV7_NEON;
- 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)
- {
- _armv8_pmull_probe();
- OPENSSL_armcap_P |= ARMV8_PMULL;
- }
- }
- if (sigsetjmp(ill_jmp,1) == 0)
- {
- _armv7_tick();
- OPENSSL_armcap_P |= ARMV7_TICK;
- }
-
- sigaction (SIGILL,&ill_oact,NULL);
- sigprocmask(SIG_SETMASK,&oset,NULL);
- }
+{
+ const 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
+
+ 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);
+ sigdelset(&all_masked, SIGFPE);
+ sigdelset(&all_masked, SIGBUS);
+ sigdelset(&all_masked, SIGSEGV);
+
+ 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 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) {
+ _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 defined(__aarch64__) && !defined(__APPLE__)
+ if (sigsetjmp(ill_jmp, 1) == 0) {
+ _armv8_sha512_probe();
+ OPENSSL_armcap_P |= ARMV8_SHA512;
+ }
+# endif
+ }
+# endif
+
+ /* Things that getauxval didn't tell us */
+ if (sigsetjmp(ill_jmp, 1) == 0) {
+ _armv7_tick();
+ OPENSSL_armcap_P |= ARMV7_TICK;
+ }
+
+ sigaction(SIGILL, &ill_oact, NULL);
+ sigprocmask(SIG_SETMASK, &oset, NULL);
+}
+#endif
projects / openssl.git / blobdiff