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authorParménides GV <parmegv@sdf.org>2014-11-04 20:45:42 +0100
committerParménides GV <parmegv@sdf.org>2014-11-04 20:45:42 +0100
commit5304543ebd60778ad46123cd63142e27627fa150 (patch)
treeb07723b530e20b23ae83de822387f6551ea7f9f4 /ics-openvpn-stripped/main/openssl/crypto/armcap.c
parent713c3a98f53a6bd1ad94e90f28d3e37d20abfab9 (diff)
Update ics-openvpn to rev 906.
Diffstat (limited to 'ics-openvpn-stripped/main/openssl/crypto/armcap.c')
-rw-r--r--ics-openvpn-stripped/main/openssl/crypto/armcap.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/ics-openvpn-stripped/main/openssl/crypto/armcap.c b/ics-openvpn-stripped/main/openssl/crypto/armcap.c
new file mode 100644
index 00000000..7e46d07a
--- /dev/null
+++ b/ics-openvpn-stripped/main/openssl/crypto/armcap.c
@@ -0,0 +1,157 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <crypto.h>
+
+#include "arm_arch.h"
+
+unsigned int OPENSSL_armcap_P;
+
+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;
+ }
+
+/*
+ * 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;
+ 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;
+ }
+
+ 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);
+ }