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 #define SPARCV9_BLK             (1<<5)  /* VIS1 block copy */
  15
  16 static int OPENSSL_sparcv9cap_P=SPARCV9_TICK_PRIVILEGED;
  17
  18 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)
  19         {
  20         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);
  21         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);
  22
  23         if ((OPENSSL_sparcv9cap_P&(SPARCV9_PREFER_FPU|SPARCV9_VIS1)) ==
  24                 (SPARCV9_PREFER_FPU|SPARCV9_VIS1))
  25                 return bn_mul_mont_fpu(rp,ap,bp,np,n0,num);
  26         else
  27                 return bn_mul_mont_int(rp,ap,bp,np,n0,num);
  28         }
  29
  30 unsigned long   _sparcv9_rdtick(void);
  31 void            _sparcv9_vis1_probe(void);
  32 unsigned long   _sparcv9_vis1_instrument(void);
  33 void            _sparcv9_vis2_probe(void);
  34 void            _sparcv9_fmadd_probe(void);
  35 size_t          _sparcv9_vis1_instrument_bus(unsigned int *,size_t);
  36 size_t          _sparcv8_vis1_instrument_bus2(unsigned int *,size_t,size_t);
  37
  38 unsigned long OPENSSL_rdtsc(void)
  39         {
  40         if (OPENSSL_sparcv9cap_P&SPARCV9_TICK_PRIVILEGED)
  41 #if defined(__sun) && defined(__SVR4)
  42                 return gethrtime();
  43 #else
  44                 return 0;
  45 #endif
  46         else
  47                 return _sparcv9_rdtick();
  48         }
  49
  50 size_t OPENSSL_instrument_bus(unsigned int *out,size_t cnt)
  51         {
  52         if (OPENSSL_sparcv9cap_P&(SPARCV9_TICK_PRIVILEGED|SPARCV9_BLK) ==
  53                         SPARCV9_BLK)
  54                 return _sparcv9_vis1_instrument_bus(out,cnt);
  55         else
  56                 return 0;
  57         }
  58
  59 size_t OPENSSL_instrument_bus2(unsigned int *out,size_t cnt,size_t max)
  60         {
  61         if (OPENSSL_sparcv9cap_P&(SPARCV9_TICK_PRIVILEGED|SPARCV9_BLK) ==
  62                         SPARCV9_BLK)
  63                 return _sparcv9_vis1_instrument_bus2(out,cnt,max);
  64         else
  65                 return 0;
  66         }
  67
  68 #if 0 && defined(__sun) && defined(__SVR4)
  69 /* This code path is disabled, because of incompatibility of
  70  * libdevinfo.so.1 and libmalloc.so.1 (see below for details)
  71  */
  72 #include <malloc.h>
  73 #include <dlfcn.h>
  74 #include <libdevinfo.h>
  75 #include <sys/systeminfo.h>
  76
  77 typedef di_node_t (*di_init_t)(const char *,uint_t);
  78 typedef void      (*di_fini_t)(di_node_t);
  79 typedef char *    (*di_node_name_t)(di_node_t);
  80 typedef int       (*di_walk_node_t)(di_node_t,uint_t,di_node_name_t,int (*)(di_node_t,di_node_name_t));
  81
  82 #define DLLINK(h,name) (name=(name##_t)dlsym((h),#name))
  83
  84 static int walk_nodename(di_node_t node, di_node_name_t di_node_name)
  85         {
  86         char *name = (*di_node_name)(node);
  87
  88         /* This is expected to catch all UltraSPARC flavors prior T1 */
  89         if (!strcmp (name,"SUNW,UltraSPARC") ||
  90             !strncmp(name,"SUNW,UltraSPARC-I",17))  /* covers II,III,IV */
  91                 {
  92                 OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU|SPARCV9_VIS1;
  93
  94                 /* %tick is privileged only on UltraSPARC-I/II, but not IIe */
  95                 if (name[14]!='\0' && name[17]!='\0' && name[18]!='\0')
  96                         OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
  97
  98                 return DI_WALK_TERMINATE;
  99                 }
 100         /* This is expected to catch remaining UltraSPARCs, such as T1 */
 101         else if (!strncmp(name,"SUNW,UltraSPARC",15))
 102                 {
 103                 OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
 104
 105                 return DI_WALK_TERMINATE;
 106                 }
 107
 108         return DI_WALK_CONTINUE;
 109         }
 110
 111 void OPENSSL_cpuid_setup(void)
 112         {
 113         void *h;
 114         char *e,si[256];
 115         static int trigger=0;
 116
 117         if (trigger) return;
 118         trigger=1;
 119
 120         if ((e=getenv("OPENSSL_sparcv9cap")))
 121                 {
 122                 OPENSSL_sparcv9cap_P=strtoul(e,NULL,0);
 123                 return;
 124                 }
 125
 126         if (sysinfo(SI_MACHINE,si,sizeof(si))>0)
 127                 {
 128                 if (strcmp(si,"sun4v"))
 129                         /* FPU is preferred for all CPUs, but US-T1/2 */
 130                         OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU;
 131                 }
 132
 133         if (sysinfo(SI_ISALIST,si,sizeof(si))>0)
 134                 {
 135                 if (strstr(si,"+vis"))
 136                         OPENSSL_sparcv9cap_P |= SPARCV9_VIS1|SPARCV9_BLK;
 137                 if (strstr(si,"+vis2"))
 138                         {
 139                         OPENSSL_sparcv9cap_P |= SPARCV9_VIS2;
 140                         OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
 141                         return;
 142                         }
 143                 }
 144 #ifdef M_KEEP
 145         /*
 146          * Solaris libdevinfo.so.1 is effectively incomatible with
 147          * libmalloc.so.1. Specifically, if application is linked with
 148          * -lmalloc, it crashes upon startup with SIGSEGV in
 149          * free(3LIBMALLOC) called by di_fini. Prior call to
 150          * mallopt(M_KEEP,0) somehow helps... But not always...
 151          */
 152         if ((h = dlopen(NULL,RTLD_LAZY)))
 153                 {
 154                 union { void *p; int (*f)(int,int); } sym;
 155                 if ((sym.p = dlsym(h,"mallopt"))) (*sym.f)(M_KEEP,0);
 156                 dlclose(h);
 157                 }
 158 #endif
 159         if ((h = dlopen("libdevinfo.so.1",RTLD_LAZY))) do
 160                 {
 161                 di_init_t       di_init;
 162                 di_fini_t       di_fini;
 163                 di_walk_node_t  di_walk_node;
 164                 di_node_name_t  di_node_name;
 165                 di_node_t       root_node;
 166
 167                 if (!DLLINK(h,di_init))         break;
 168                 if (!DLLINK(h,di_fini))         break;
 169                 if (!DLLINK(h,di_walk_node))    break;
 170                 if (!DLLINK(h,di_node_name))    break;
 171
 172                 if ((root_node = (*di_init)("/",DINFOSUBTREE))!=DI_NODE_NIL)
 173                         {
 174                         (*di_walk_node)(root_node,DI_WALK_SIBFIRST,
 175                                         di_node_name,walk_nodename);
 176                         (*di_fini)(root_node);
 177                         }
 178                 } while(0);
 179
 180         if (h) dlclose(h);
 181         }
 182
 183 #else
 184
 185 static sigjmp_buf common_jmp;
 186 static void common_handler(int sig) { siglongjmp(common_jmp,sig); }
 187
 188 void OPENSSL_cpuid_setup(void)
 189         {
 190         char *e;
 191         struct sigaction        common_act,ill_oact,bus_oact;
 192         sigset_t                all_masked,oset;
 193         static int trigger=0;
 194
 195         if (trigger) return;
 196         trigger=1;
 197
 198         if ((e=getenv("OPENSSL_sparcv9cap")))
 199                 {
 200                 OPENSSL_sparcv9cap_P=strtoul(e,NULL,0);
 201                 return;
 202                 }
 203
 204         /* Initial value, fits UltraSPARC-I&II... */
 205         OPENSSL_sparcv9cap_P = SPARCV9_PREFER_FPU|SPARCV9_TICK_PRIVILEGED;
 206
 207         sigfillset(&all_masked);
 208         sigdelset(&all_masked,SIGILL);
 209         sigdelset(&all_masked,SIGTRAP);
 210 #ifdef SIGEMT
 211         sigdelset(&all_masked,SIGEMT);
 212 #endif
 213         sigdelset(&all_masked,SIGFPE);
 214         sigdelset(&all_masked,SIGBUS);
 215         sigdelset(&all_masked,SIGSEGV);
 216         sigprocmask(SIG_SETMASK,&all_masked,&oset);
 217
 218         memset(&common_act,0,sizeof(common_act));
 219         common_act.sa_handler = common_handler;
 220         common_act.sa_mask    = all_masked;
 221
 222         sigaction(SIGILL,&common_act,&ill_oact);
 223         sigaction(SIGBUS,&common_act,&bus_oact);/* T1 fails 16-bit ldda [on Linux] */
 224
 225         if (sigsetjmp(common_jmp,1) == 0)
 226                 {
 227                 _sparcv9_rdtick();
 228                 OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
 229                 }
 230
 231         if (sigsetjmp(common_jmp,1) == 0)
 232                 {
 233                 _sparcv9_vis1_probe();
 234                 OPENSSL_sparcv9cap_P |= SPARCV9_VIS1|SPARCV9_BLK;
 235                 /* detect UltraSPARC-Tx, see sparccpud.S for details... */
 236                 if (_sparcv9_vis1_instrument() >= 12)
 237                         OPENSSL_sparcv9cap_P &= ~(SPARCV9_VIS1|SPARCV9_PREFER_FPU);
 238                 else
 239                         {
 240                         _sparcv9_vis2_probe();
 241                         OPENSSL_sparcv9cap_P |= SPARCV9_VIS2;
 242                         }
 243                 }
 244
 245         if (sigsetjmp(common_jmp,1) == 0)
 246                 {
 247                 _sparcv9_fmadd_probe();
 248                 OPENSSL_sparcv9cap_P |= SPARCV9_FMADD;
 249                 }
 250
 251         sigaction(SIGBUS,&bus_oact,NULL);
 252         sigaction(SIGILL,&ill_oact,NULL);
 253
 254         sigprocmask(SIG_SETMASK,&oset,NULL);
 255         }
 256
 257 #endif