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 <unistd.h>
   8 #include <openssl/bn.h>
   9
  10 #include "sparc_arch.h"
  11
  12 #if defined(__GNUC__) && defined(__linux)
  13 __attribute__((visibility("hidden")))
  14 #endif
  15 unsigned int OPENSSL_sparcv9cap_P[2]={SPARCV9_TICK_PRIVILEGED,0};
  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_vis3(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_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 (!(num&1) && num>=6)
  24                 {
  25                 if ((num&15)==0 && num<=64 &&
  26                     (OPENSSL_sparcv9cap_P[1]&(CFR_MONTMUL|CFR_MONTSQR))==
  27                                              (CFR_MONTMUL|CFR_MONTSQR))
  28                         {
  29                         typedef int (*bn_mul_mont_f)(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0);
  30                         int bn_mul_mont_t4_8(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0);
  31                         int bn_mul_mont_t4_16(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0);
  32                         int bn_mul_mont_t4_24(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0);
  33                         int bn_mul_mont_t4_32(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np,const BN_ULONG *n0);
  34                         static const bn_mul_mont_f funcs[4] = {
  35                                 bn_mul_mont_t4_8,       bn_mul_mont_t4_16,
  36                                 bn_mul_mont_t4_24,      bn_mul_mont_t4_32 };
  37                         bn_mul_mont_f worker = funcs[num/16-1];
  38
  39                         if ((*worker)(rp,ap,bp,np,n0)) return 1;
  40                         /* retry once and fall back */
  41                         if ((*worker)(rp,ap,bp,np,n0)) return 1;
  42                         return bn_mul_mont_vis3(rp,ap,bp,np,n0,num);
  43                         }
  44                 if ((OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS3))
  45                         return bn_mul_mont_vis3(rp,ap,bp,np,n0,num);
  46                 else if (num>=8 &&
  47                         (OPENSSL_sparcv9cap_P[0]&(SPARCV9_PREFER_FPU|SPARCV9_VIS1)) ==
  48                         (SPARCV9_PREFER_FPU|SPARCV9_VIS1))
  49                         return bn_mul_mont_fpu(rp,ap,bp,np,n0,num);
  50                 }
  51         return bn_mul_mont_int(rp,ap,bp,np,n0,num);
  52         }
  53
  54 unsigned long   _sparcv9_rdtick(void);
  55 void            _sparcv9_vis1_probe(void);
  56 unsigned long   _sparcv9_vis1_instrument(void);
  57 void            _sparcv9_vis2_probe(void);
  58 void            _sparcv9_fmadd_probe(void);
  59 unsigned long   _sparcv9_rdcfr(void);
  60 void            _sparcv9_vis3_probe(void);
  61 unsigned long   _sparcv9_random(void);
  62 size_t          _sparcv9_vis1_instrument_bus(unsigned int *,size_t);
  63 size_t          _sparcv9_vis1_instrument_bus2(unsigned int *,size_t,size_t);
  64
  65 unsigned long OPENSSL_rdtsc(void)
  66         {
  67         if (OPENSSL_sparcv9cap_P[0]&SPARCV9_TICK_PRIVILEGED)
  68 #if defined(__sun) && defined(__SVR4)
  69                 return gethrtime();
  70 #else
  71                 return 0;
  72 #endif
  73         else
  74                 return _sparcv9_rdtick();
  75         }
  76
  77 size_t OPENSSL_instrument_bus(unsigned int *out,size_t cnt)
  78         {
  79         if ((OPENSSL_sparcv9cap_P[0]&(SPARCV9_TICK_PRIVILEGED|SPARCV9_BLK)) ==
  80                         SPARCV9_BLK)
  81                 return _sparcv9_vis1_instrument_bus(out,cnt);
  82         else
  83                 return 0;
  84         }
  85
  86 size_t OPENSSL_instrument_bus2(unsigned int *out,size_t cnt,size_t max)
  87         {
  88         if ((OPENSSL_sparcv9cap_P[0]&(SPARCV9_TICK_PRIVILEGED|SPARCV9_BLK)) ==
  89                         SPARCV9_BLK)
  90                 return _sparcv9_vis1_instrument_bus2(out,cnt,max);
  91         else
  92                 return 0;
  93         }
  94
  95 #if 0 && defined(__sun) && defined(__SVR4)
  96 /* This code path is disabled, because of incompatibility of
  97  * libdevinfo.so.1 and libmalloc.so.1 (see below for details)
  98  */
  99 #include <malloc.h>
 100 #include <dlfcn.h>
 101 #include <libdevinfo.h>
 102 #include <sys/systeminfo.h>
 103
 104 typedef di_node_t (*di_init_t)(const char *,uint_t);
 105 typedef void      (*di_fini_t)(di_node_t);
 106 typedef char *    (*di_node_name_t)(di_node_t);
 107 typedef int       (*di_walk_node_t)(di_node_t,uint_t,di_node_name_t,int (*)(di_node_t,di_node_name_t));
 108
 109 #define DLLINK(h,name) (name=(name##_t)dlsym((h),#name))
 110
 111 static int walk_nodename(di_node_t node, di_node_name_t di_node_name)
 112         {
 113         char *name = (*di_node_name)(node);
 114
 115         /* This is expected to catch all UltraSPARC flavors prior T1 */
 116         if (!strcmp (name,"SUNW,UltraSPARC") ||
 117             !strncmp(name,"SUNW,UltraSPARC-I",17))  /* covers II,III,IV */
 118                 {
 119                 OPENSSL_sparcv9cap_P[0] |= SPARCV9_PREFER_FPU|SPARCV9_VIS1;
 120
 121                 /* %tick is privileged only on UltraSPARC-I/II, but not IIe */
 122                 if (name[14]!='\0' && name[17]!='\0' && name[18]!='\0')
 123                         OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
 124
 125                 return DI_WALK_TERMINATE;
 126                 }
 127         /* This is expected to catch remaining UltraSPARCs, such as T1 */
 128         else if (!strncmp(name,"SUNW,UltraSPARC",15))
 129                 {
 130                 OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
 131
 132                 return DI_WALK_TERMINATE;
 133                 }
 134
 135         return DI_WALK_CONTINUE;
 136         }
 137
 138 void OPENSSL_cpuid_setup(void)
 139         {
 140         void *h;
 141         char *e,si[256];
 142         static int trigger=0;
 143
 144         if (trigger) return;
 145         trigger=1;
 146
 147         if ((e=getenv("OPENSSL_sparcv9cap")))
 148                 {
 149                 OPENSSL_sparcv9cap_P[0]=strtoul(e,NULL,0);
 150                 return;
 151                 }
 152
 153         if (sysinfo(SI_MACHINE,si,sizeof(si))>0)
 154                 {
 155                 if (strcmp(si,"sun4v"))
 156                         /* FPU is preferred for all CPUs, but US-T1/2 */
 157                         OPENSSL_sparcv9cap_P[0] |= SPARCV9_PREFER_FPU;
 158                 }
 159
 160         if (sysinfo(SI_ISALIST,si,sizeof(si))>0)
 161                 {
 162                 if (strstr(si,"+vis"))
 163                         OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1|SPARCV9_BLK;
 164                 if (strstr(si,"+vis2"))
 165                         {
 166                         OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;
 167                         OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
 168                         return;
 169                         }
 170                 }
 171 #ifdef M_KEEP
 172         /*
 173          * Solaris libdevinfo.so.1 is effectively incomatible with
 174          * libmalloc.so.1. Specifically, if application is linked with
 175          * -lmalloc, it crashes upon startup with SIGSEGV in
 176          * free(3LIBMALLOC) called by di_fini. Prior call to
 177          * mallopt(M_KEEP,0) somehow helps... But not always...
 178          */
 179         if ((h = dlopen(NULL,RTLD_LAZY)))
 180                 {
 181                 union { void *p; int (*f)(int,int); } sym;
 182                 if ((sym.p = dlsym(h,"mallopt"))) (*sym.f)(M_KEEP,0);
 183                 dlclose(h);
 184                 }
 185 #endif
 186         if ((h = dlopen("libdevinfo.so.1",RTLD_LAZY))) do
 187                 {
 188                 di_init_t       di_init;
 189                 di_fini_t       di_fini;
 190                 di_walk_node_t  di_walk_node;
 191                 di_node_name_t  di_node_name;
 192                 di_node_t       root_node;
 193
 194                 if (!DLLINK(h,di_init))         break;
 195                 if (!DLLINK(h,di_fini))         break;
 196                 if (!DLLINK(h,di_walk_node))    break;
 197                 if (!DLLINK(h,di_node_name))    break;
 198
 199                 if ((root_node = (*di_init)("/",DINFOSUBTREE))!=DI_NODE_NIL)
 200                         {
 201                         (*di_walk_node)(root_node,DI_WALK_SIBFIRST,
 202                                         di_node_name,walk_nodename);
 203                         (*di_fini)(root_node);
 204                         }
 205                 } while(0);
 206
 207         if (h) dlclose(h);
 208         }
 209
 210 #else
 211
 212 static sigjmp_buf common_jmp;
 213 static void common_handler(int sig) { siglongjmp(common_jmp,sig); }
 214
 215 void OPENSSL_cpuid_setup(void)
 216         {
 217         char *e;
 218         struct sigaction        common_act,ill_oact,bus_oact;
 219         sigset_t                all_masked,oset;
 220         static int trigger=0;
 221
 222         if (trigger) return;
 223         trigger=1;
 224
 225         if ((e=getenv("OPENSSL_sparcv9cap")))
 226                 {
 227                 OPENSSL_sparcv9cap_P[0]=strtoul(e,NULL,0);
 228                 if ((e=strchr(e,':')))
 229                         OPENSSL_sparcv9cap_P[1]=strtoul(e+1,NULL,0);
 230                 return;
 231                 }
 232
 233         /* Initial value, fits UltraSPARC-I&II... */
 234         OPENSSL_sparcv9cap_P[0] = SPARCV9_PREFER_FPU|SPARCV9_TICK_PRIVILEGED;
 235
 236         sigfillset(&all_masked);
 237         sigdelset(&all_masked,SIGILL);
 238         sigdelset(&all_masked,SIGTRAP);
 239 #ifdef SIGEMT
 240         sigdelset(&all_masked,SIGEMT);
 241 #endif
 242         sigdelset(&all_masked,SIGFPE);
 243         sigdelset(&all_masked,SIGBUS);
 244         sigdelset(&all_masked,SIGSEGV);
 245         sigprocmask(SIG_SETMASK,&all_masked,&oset);
 246
 247         memset(&common_act,0,sizeof(common_act));
 248         common_act.sa_handler = common_handler;
 249         common_act.sa_mask    = all_masked;
 250
 251         sigaction(SIGILL,&common_act,&ill_oact);
 252         sigaction(SIGBUS,&common_act,&bus_oact);/* T1 fails 16-bit ldda [on Linux] */
 253
 254         if (sigsetjmp(common_jmp,1) == 0)
 255                 {
 256                 _sparcv9_rdtick();
 257                 OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
 258                 }
 259
 260         if (sigsetjmp(common_jmp,1) == 0)
 261                 {
 262                 _sparcv9_vis1_probe();
 263                 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1|SPARCV9_BLK;
 264                 /* detect UltraSPARC-Tx, see sparccpud.S for details... */
 265                 if (_sparcv9_vis1_instrument() >= 12)
 266                         OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1|SPARCV9_PREFER_FPU);
 267                 else
 268                         {
 269                         _sparcv9_vis2_probe();
 270                         OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;
 271                         }
 272                 }
 273
 274         if (sigsetjmp(common_jmp,1) == 0)
 275                 {
 276                 _sparcv9_fmadd_probe();
 277                 OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD;
 278                 }
 279
 280         /*
 281          * VIS3 flag is tested independently from VIS1, unlike VIS2 that is,
 282          * because VIS3 defines even integer instructions.
 283          */
 284         if (sigsetjmp(common_jmp,1) == 0)
 285                 {
 286                 _sparcv9_vis3_probe();
 287                 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3;
 288                 }
 289
 290 #if 0   /* was planned at some point but never implemented in hardware */
 291         if (sigsetjmp(common_jmp,1) == 0)
 292                 {
 293                 (void)_sparcv9_random();
 294                 OPENSSL_sparcv9cap_P[0] |= SPARCV9_RANDOM;
 295                 }
 296 #endif
 297
 298         /*
 299          * In wait for better solution _sparcv9_rdcfr is masked by
 300          * VIS3 flag, because it goes to uninterruptable endless
 301          * loop on UltraSPARC II running Solaris. Things might be
 302          * different on Linux...
 303          */
 304         if ((OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS3) &&
 305             sigsetjmp(common_jmp,1) == 0)
 306                 {
 307                 OPENSSL_sparcv9cap_P[1] = (unsigned int)_sparcv9_rdcfr();
 308                 }
 309
 310         sigaction(SIGBUS,&bus_oact,NULL);
 311         sigaction(SIGILL,&ill_oact,NULL);
 312
 313         sigprocmask(SIG_SETMASK,&oset,NULL);
 314
 315         if (sizeof(size_t)==8)
 316                 OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
 317 #ifdef __linux
 318         else
 319                 {
 320                 int ret = syscall(340);
 321
 322                 if (ret>=0 && ret&1)
 323                         OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
 324                 }
 325 #endif
 326         }
 327
 328 #endif