sparcv9cap.c revision 43c12e3d4f9bbbbd4a8ba7b149686437514bc6b6 
1#include <stdio.h>
2#include <stdlib.h>
3#include <string.h>
4#include <setjmp.h>
5#include <signal.h>
6#include <sys/time.h>
7#include <openssl/bn.h>
8
9#define SPARCV9_TICK_PRIVILEGED	(1<<0)
10#define SPARCV9_PREFER_FPU	(1<<1)
11#define SPARCV9_VIS1		(1<<2)
12#define SPARCV9_VIS2		(1<<3)	/* reserved */
13#define SPARCV9_FMADD		(1<<4)	/* reserved for SPARC64 V */
14
15static int OPENSSL_sparcv9cap_P=SPARCV9_TICK_PRIVILEGED;
16
17int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0, int num)
18	{
19	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);
20	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);
21
22	if ((OPENSSL_sparcv9cap_P&(SPARCV9_PREFER_FPU|SPARCV9_VIS1)) ==
23		(SPARCV9_PREFER_FPU|SPARCV9_VIS1))
24		return bn_mul_mont_fpu(rp,ap,bp,np,n0,num);
25	else
26		return bn_mul_mont_int(rp,ap,bp,np,n0,num);
27	}
28
29unsigned long	_sparcv9_rdtick(void);
30void		_sparcv9_vis1_probe(void);
31unsigned long	_sparcv9_vis1_instrument(void);
32void		_sparcv9_vis2_probe(void);
33void		_sparcv9_fmadd_probe(void);
34
35unsigned long OPENSSL_rdtsc(void)
36	{
37	if (OPENSSL_sparcv9cap_P&SPARCV9_TICK_PRIVILEGED)
38#if defined(__sun) && defined(__SVR4)
39		return gethrtime();
40#else
41		return 0;
42#endif
43	else
44		return _sparcv9_rdtick();
45	}
46
47#if 0 && defined(__sun) && defined(__SVR4)
48/* This code path is disabled, because of incompatibility of
49 * libdevinfo.so.1 and libmalloc.so.1 (see below for details)
50 */
51#include <malloc.h>
52#include <dlfcn.h>
53#include <libdevinfo.h>
54#include <sys/systeminfo.h>
55
56typedef di_node_t (*di_init_t)(const char *,uint_t);
57typedef void      (*di_fini_t)(di_node_t);
58typedef char *    (*di_node_name_t)(di_node_t);
59typedef int       (*di_walk_node_t)(di_node_t,uint_t,di_node_name_t,int (*)(di_node_t,di_node_name_t));
60
61#define DLLINK(h,name) (name=(name##_t)dlsym((h),#name))
62
63static int walk_nodename(di_node_t node, di_node_name_t di_node_name)
64	{
65	char *name = (*di_node_name)(node);
66
67	/* This is expected to catch all UltraSPARC flavors prior T1 */
68	if (!strcmp (name,"SUNW,UltraSPARC") ||
69	    !strncmp(name,"SUNW,UltraSPARC-I",17))  /* covers II,III,IV */
70		{
71		OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU|SPARCV9_VIS1;
72
73		/* %tick is privileged only on UltraSPARC-I/II, but not IIe */
74		if (name[14]!='\0' && name[17]!='\0' && name[18]!='\0')
75			OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
76
77		return DI_WALK_TERMINATE;
78		}
79	/* This is expected to catch remaining UltraSPARCs, such as T1 */
80	else if (!strncmp(name,"SUNW,UltraSPARC",15))
81		{
82		OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
83
84		return DI_WALK_TERMINATE;
85		}
86
87	return DI_WALK_CONTINUE;
88	}
89
90void OPENSSL_cpuid_setup(void)
91	{
92	void *h;
93	char *e,si[256];
94	static int trigger=0;
95
96	if (trigger) return;
97	trigger=1;
98
99	if ((e=getenv("OPENSSL_sparcv9cap")))
100		{
101		OPENSSL_sparcv9cap_P=strtoul(e,NULL,0);
102		return;
103		}
104
105	if (sysinfo(SI_MACHINE,si,sizeof(si))>0)
106		{
107		if (strcmp(si,"sun4v"))
108			/* FPU is preferred for all CPUs, but US-T1/2 */
109			OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU;
110		}
111
112	if (sysinfo(SI_ISALIST,si,sizeof(si))>0)
113		{
114		if (strstr(si,"+vis"))
115			OPENSSL_sparcv9cap_P |= SPARCV9_VIS1;
116		if (strstr(si,"+vis2"))
117			{
118			OPENSSL_sparcv9cap_P |= SPARCV9_VIS2;
119			OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
120			return;
121			}
122		}
123#ifdef M_KEEP
124	/*
125	 * Solaris libdevinfo.so.1 is effectively incomatible with
126	 * libmalloc.so.1. Specifically, if application is linked with
127	 * -lmalloc, it crashes upon startup with SIGSEGV in
128	 * free(3LIBMALLOC) called by di_fini. Prior call to
129	 * mallopt(M_KEEP,0) somehow helps... But not always...
130	 */
131	if ((h = dlopen(NULL,RTLD_LAZY)))
132		{
133		union { void *p; int (*f)(int,int); } sym;
134		if ((sym.p = dlsym(h,"mallopt"))) (*sym.f)(M_KEEP,0);
135		dlclose(h);
136		}
137#endif
138	if ((h = dlopen("libdevinfo.so.1",RTLD_LAZY))) do
139		{
140		di_init_t	di_init;
141		di_fini_t	di_fini;
142		di_walk_node_t	di_walk_node;
143		di_node_name_t	di_node_name;
144		di_node_t	root_node;
145
146		if (!DLLINK(h,di_init))		break;
147		if (!DLLINK(h,di_fini))		break;
148		if (!DLLINK(h,di_walk_node))	break;
149		if (!DLLINK(h,di_node_name))	break;
150
151		if ((root_node = (*di_init)("/",DINFOSUBTREE))!=DI_NODE_NIL)
152			{
153			(*di_walk_node)(root_node,DI_WALK_SIBFIRST,
154					di_node_name,walk_nodename);
155			(*di_fini)(root_node);
156			}
157		} while(0);
158
159	if (h) dlclose(h);
160	}
161
162#else
163
164static sigjmp_buf common_jmp;
165static void common_handler(int sig) { siglongjmp(common_jmp,sig); }
166
167void OPENSSL_cpuid_setup(void)
168	{
169	char *e;
170	struct sigaction	common_act,ill_oact,bus_oact;
171	sigset_t		all_masked,oset;
172	int			sig;
173	static int trigger=0;
174
175	if (trigger) return;
176	trigger=1;
177
178	if ((e=getenv("OPENSSL_sparcv9cap")))
179		{
180		OPENSSL_sparcv9cap_P=strtoul(e,NULL,0);
181		return;
182		}
183
184	/* Initial value, fits UltraSPARC-I&II... */
185	OPENSSL_sparcv9cap_P = SPARCV9_PREFER_FPU|SPARCV9_TICK_PRIVILEGED;
186
187	sigfillset(&all_masked);
188	sigdelset(&all_masked,SIGILL);
189	sigdelset(&all_masked,SIGTRAP);
190#ifdef SIGEMT
191	sigdelset(&all_masked,SIGEMT);
192#endif
193	sigdelset(&all_masked,SIGFPE);
194	sigdelset(&all_masked,SIGBUS);
195	sigdelset(&all_masked,SIGSEGV);
196	sigprocmask(SIG_SETMASK,&all_masked,&oset);
197
198	memset(&common_act,0,sizeof(common_act));
199	common_act.sa_handler = common_handler;
200	common_act.sa_mask    = all_masked;
201
202	sigaction(SIGILL,&common_act,&ill_oact);
203	sigaction(SIGBUS,&common_act,&bus_oact);/* T1 fails 16-bit ldda [on Linux] */
204
205	if (sigsetjmp(common_jmp,1) == 0)
206		{
207		_sparcv9_rdtick();
208		OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
209		}
210
211	if (sigsetjmp(common_jmp,1) == 0)
212		{
213		_sparcv9_vis1_probe();
214		OPENSSL_sparcv9cap_P |= SPARCV9_VIS1;
215		/* detect UltraSPARC-Tx, see sparccpud.S for details... */
216		if (_sparcv9_vis1_instrument() >= 12)
217			OPENSSL_sparcv9cap_P &= ~(SPARCV9_VIS1|SPARCV9_PREFER_FPU);
218		else
219			{
220			_sparcv9_vis2_probe();
221			OPENSSL_sparcv9cap_P |= SPARCV9_VIS2;
222			}
223		}
224
225	if (sigsetjmp(common_jmp,1) == 0)
226		{
227		_sparcv9_fmadd_probe();
228		OPENSSL_sparcv9cap_P |= SPARCV9_FMADD;
229		}
230
231	sigaction(SIGBUS,&bus_oact,NULL);
232	sigaction(SIGILL,&ill_oact,NULL);
233
234	sigprocmask(SIG_SETMASK,&oset,NULL);
235	}
236
237#endif
238