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