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openssl/crypto/sparcv9cap.c

Index: openssl/crypto/sparcv9cap.c
===================================================================
--- openssl/crypto/sparcv9cap.c	(revision 0)
+++ openssl/crypto/sparcv9cap.c	(revision 0)
@@ -0,0 +1,237 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <openssl/bn.h>
+
+#define SPARCV9_TICK_PRIVILEGED	(1<<0)
+#define SPARCV9_PREFER_FPU	(1<<1)
+#define SPARCV9_VIS1		(1<<2)
+#define SPARCV9_VIS2		(1<<3)	/* reserved */
+#define SPARCV9_FMADD		(1<<4)	/* reserved for SPARC64 V */
+
+static int OPENSSL_sparcv9cap_P=SPARCV9_TICK_PRIVILEGED;
+
+int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0, int num)
+	{
+	int bn_mul_mont_fpu(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0, int num);
+	int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0, int num);
+
+	if ((OPENSSL_sparcv9cap_P&(SPARCV9_PREFER_FPU|SPARCV9_VIS1)) ==
+		(SPARCV9_PREFER_FPU|SPARCV9_VIS1))
+		return bn_mul_mont_fpu(rp,ap,bp,np,n0,num);
+	else
+		return bn_mul_mont_int(rp,ap,bp,np,n0,num);
+	}
+
+unsigned long	_sparcv9_rdtick(void);
+void		_sparcv9_vis1_probe(void);
+unsigned long	_sparcv9_vis1_instrument(void);
+void		_sparcv9_vis2_probe(void);
+void		_sparcv9_fmadd_probe(void);
+
+unsigned long OPENSSL_rdtsc(void)
+	{
+	if (OPENSSL_sparcv9cap_P&SPARCV9_TICK_PRIVILEGED)
+#if defined(__sun) && defined(__SVR4)
+		return gethrtime();
+#else
+		return 0;
+#endif
+	else
+		return _sparcv9_rdtick();
+	}
+
+#if 0 && defined(__sun) && defined(__SVR4)
+/* This code path is disabled, because of incompatibility of
+ * libdevinfo.so.1 and libmalloc.so.1 (see below for details)
+ */
+#include <malloc.h>
+#include <dlfcn.h>
+#include <libdevinfo.h>
+#include <sys/systeminfo.h>
+
+typedef di_node_t (*di_init_t)(const char *,uint_t);
+typedef void      (*di_fini_t)(di_node_t);
+typedef char *    (*di_node_name_t)(di_node_t);
+typedef int       (*di_walk_node_t)(di_node_t,uint_t,di_node_name_t,int (*)(di_node_t,di_node_name_t));
+
+#define DLLINK(h,name) (name=(name##_t)dlsym((h),#name))
+
+static int walk_nodename(di_node_t node, di_node_name_t di_node_name)
+	{
+	char *name = (*di_node_name)(node);
+
+	/* This is expected to catch all UltraSPARC flavors prior T1 */
+	if (!strcmp (name,"SUNW,UltraSPARC") ||
+	    !strncmp(name,"SUNW,UltraSPARC-I",17))  /* covers II,III,IV */
+		{
+		OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU|SPARCV9_VIS1;
+
+		/* %tick is privileged only on UltraSPARC-I/II, but not IIe */
+		if (name[14]!='\0' && name[17]!='\0' && name[18]!='\0')
+			OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
+
+		return DI_WALK_TERMINATE;
+		}
+	/* This is expected to catch remaining UltraSPARCs, such as T1 */
+	else if (!strncmp(name,"SUNW,UltraSPARC",15))
+		{
+		OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
+
+		return DI_WALK_TERMINATE;
+		}
+
+	return DI_WALK_CONTINUE;
+	}
+
+void OPENSSL_cpuid_setup(void)
+	{
+	void *h;
+	char *e,si[256];
+	static int trigger=0;
+
+	if (trigger) return;
+	trigger=1;
+
+	if ((e=getenv("OPENSSL_sparcv9cap")))
+		{
+		OPENSSL_sparcv9cap_P=strtoul(e,NULL,0);
+		return;
+		}
+
+	if (sysinfo(SI_MACHINE,si,sizeof(si))>0)
+		{
+		if (strcmp(si,"sun4v"))
+			/* FPU is preferred for all CPUs, but US-T1/2 */
+			OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU;
+		}
+
+	if (sysinfo(SI_ISALIST,si,sizeof(si))>0)
+		{
+		if (strstr(si,"+vis"))
+			OPENSSL_sparcv9cap_P |= SPARCV9_VIS1;
+		if (strstr(si,"+vis2"))
+			{
+			OPENSSL_sparcv9cap_P |= SPARCV9_VIS2;
+			OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
+			return;
+			}
+		}
+#ifdef M_KEEP
+	/*
+	 * Solaris libdevinfo.so.1 is effectively incomatible with
+	 * libmalloc.so.1. Specifically, if application is linked with
+	 * -lmalloc, it crashes upon startup with SIGSEGV in
+	 * free(3LIBMALLOC) called by di_fini. Prior call to
+	 * mallopt(M_KEEP,0) somehow helps... But not always...
+	 */
+	if ((h = dlopen(NULL,RTLD_LAZY)))
+		{
+		union { void *p; int (*f)(int,int); } sym;
+		if ((sym.p = dlsym(h,"mallopt"))) (*sym.f)(M_KEEP,0);
+		dlclose(h);
+		}
+#endif
+	if ((h = dlopen("libdevinfo.so.1",RTLD_LAZY))) do
+		{
+		di_init_t	di_init;
+		di_fini_t	di_fini;
+		di_walk_node_t	di_walk_node;
+		di_node_name_t	di_node_name;
+		di_node_t	root_node;
+
+		if (!DLLINK(h,di_init))		break;
+		if (!DLLINK(h,di_fini))		break;
+		if (!DLLINK(h,di_walk_node))	break;
+		if (!DLLINK(h,di_node_name))	break;
+
+		if ((root_node = (*di_init)("/",DINFOSUBTREE))!=DI_NODE_NIL)
+			{
+			(*di_walk_node)(root_node,DI_WALK_SIBFIRST,
+					di_node_name,walk_nodename);
+			(*di_fini)(root_node);
+			}
+		} while(0);
+
+	if (h) dlclose(h);
+	}
+
+#else
+
+static sigjmp_buf common_jmp;
+static void common_handler(int sig) { siglongjmp(common_jmp,sig); }
+
+void OPENSSL_cpuid_setup(void)
+	{
+	char *e;
+	struct sigaction	common_act,ill_oact,bus_oact;
+	sigset_t		all_masked,oset;
+	int			sig;
+	static int trigger=0;
+
+	if (trigger) return;
+	trigger=1;
+ 
+	if ((e=getenv("OPENSSL_sparcv9cap")))
+		{
+		OPENSSL_sparcv9cap_P=strtoul(e,NULL,0);
+		return;
+		}
+
+	/* Initial value, fits UltraSPARC-I&II... */
+	OPENSSL_sparcv9cap_P = SPARCV9_PREFER_FPU|SPARCV9_TICK_PRIVILEGED;
+
+	sigfillset(&all_masked);
+	sigdelset(&all_masked,SIGILL);
+	sigdelset(&all_masked,SIGTRAP);
+#ifdef SIGEMT
+	sigdelset(&all_masked,SIGEMT);
+#endif
+	sigdelset(&all_masked,SIGFPE);
+	sigdelset(&all_masked,SIGBUS);
+	sigdelset(&all_masked,SIGSEGV);
+	sigprocmask(SIG_SETMASK,&all_masked,&oset);
+
+	memset(&common_act,0,sizeof(common_act));
+	common_act.sa_handler = common_handler;
+	common_act.sa_mask    = all_masked;
+
+	sigaction(SIGILL,&common_act,&ill_oact);
+	sigaction(SIGBUS,&common_act,&bus_oact);/* T1 fails 16-bit ldda [on Linux] */
+
+	if (sigsetjmp(common_jmp,1) == 0)
+		{
+		_sparcv9_rdtick();
+		OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
+		}
+
+	if (sigsetjmp(common_jmp,1) == 0)
+		{
+		_sparcv9_vis1_probe();
+		OPENSSL_sparcv9cap_P |= SPARCV9_VIS1;
+		/* detect UltraSPARC-Tx, see sparccpud.S for details... */
+		if (_sparcv9_vis1_instrument() >= 12)
+			OPENSSL_sparcv9cap_P &= ~(SPARCV9_VIS1|SPARCV9_PREFER_FPU);
+		else
+			{
+			_sparcv9_vis2_probe();
+			OPENSSL_sparcv9cap_P |= SPARCV9_VIS2;
+			}
+		}
+
+	if (sigsetjmp(common_jmp,1) == 0)
+		{
+		_sparcv9_fmadd_probe();
+		OPENSSL_sparcv9cap_P |= SPARCV9_FMADD;
+		}
+
+	sigaction(SIGBUS,&bus_oact,NULL);
+	sigaction(SIGILL,&ill_oact,NULL);
+
+	sigprocmask(SIG_SETMASK,&oset,NULL);
+	}
+
+#endif