vendor/openssl/1.0.2d

1 files changed, 90 insertions, 7 deletions

diff --git a/crypto/armcap.c b/crypto/armcap.c
index 28522ea867845..356fa152871fa 100644
--- a/crypto/armcap.c
+++ b/crypto/armcap.c
@@ -7,8 +7,18 @@
 
 #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)
+{
+}
+
+unsigned long OPENSSL_rdtsc(void)
+{
+    return 0;
+}
+#else
 static sigset_t all_masked;
 
 static sigjmp_buf ill_jmp;
@@ -22,9 +32,13 @@ static void ill_handler(int sig)
  * ARM compilers support inline assembler...
  */
 void _armv7_neon_probe(void);
-unsigned int _armv7_tick(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 int OPENSSL_rdtsc(void)
+unsigned long OPENSSL_rdtsc(void)
 {
     if (OPENSSL_armcap_P & ARMV7_TICK)
         return _armv7_tick();
@@ -32,9 +46,44 @@ unsigned int OPENSSL_rdtsc(void)
         return 0;
 }
 
-#if defined(__GNUC__) && __GNUC__>=2
+/*
+ * 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));
-#endif
+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;
@@ -47,7 +96,7 @@ void OPENSSL_cpuid_setup(void)
     trigger = 1;
 
     if ((e = getenv("OPENSSL_armcap"))) {
-        OPENSSL_armcap_P = strtoul(e, NULL, 0);
+        OPENSSL_armcap_P = (unsigned int)strtoul(e, NULL, 0);
         return;
     }
 
@@ -67,9 +116,42 @@ 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;
+        }
+        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();
@@ -79,3 +161,4 @@ void OPENSSL_cpuid_setup(void)
     sigaction(SIGILL, &ill_oact, NULL);
     sigprocmask(SIG_SETMASK, &oset, NULL);
 }
+#endif