crypto/sparcv9cap.c

   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
  15 static int OPENSSL_sparcv9cap_P=SPARCV9_TICK_PRIVILEGED;
  16
  17 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)
  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
  29 unsigned long   _sparcv9_rdtick(void);
  30 void            _sparcv9_vis1_probe(void);
  31 unsigned long   _sparcv9_vis1_instrument(void);
  32 void            _sparcv9_vis2_probe(void);
  33 void            _sparcv9_fmadd_probe(void);
  34
  35 unsigned 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
  56 typedef di_node_t (*di_init_t)(const char *,uint_t);
  57 typedef void      (*di_fini_t)(di_node_t);
  58 typedef char *    (*di_node_name_t)(di_node_t);
  59 typedef 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
  63 static 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
  90 void 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
 164 static sigjmp_buf common_jmp;
 165 static void common_handler(int sig) { siglongjmp(common_jmp,sig); }
 166
 167 void 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