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 unsigned long   _sparcv9_rdwrasi(unsigned long);
  31 void            _sparcv9_vis1_probe(void);
  32
  33 unsigned long OPENSSL_rdtsc(void)
  34         {
  35         if (OPENSSL_sparcv9cap_P&SPARCV9_TICK_PRIVILEGED)
  36 #if defined(__sun) && defined(__SVR4)
  37                 return gethrtime();
  38 #else
  39                 return 0;
  40 #endif
  41         else
  42                 return _sparcv9_rdtick();
  43         }
  44
  45 #if defined(__sun) && defined(__SVR4)
  46
  47 #include <dlfcn.h>
  48 #include <libdevinfo.h>
  49 #include <sys/systeminfo.h>
  50
  51 typedef di_node_t (*di_init_t)(const char *,uint_t);
  52 typedef void      (*di_fini_t)(di_node_t);
  53 typedef char *    (*di_node_name_t)(di_node_t);
  54 typedef int       (*di_walk_node_t)(di_node_t,uint_t,di_node_name_t,int (*)(di_node_t,di_node_name_t));
  55
  56 #define DLLINK(h,name) (name=(name##_t)dlsym((h),#name))
  57
  58 static int walk_nodename(di_node_t node, di_node_name_t di_node_name)
  59         {
  60         char *name = (*di_node_name)(node);
  61
  62         /* This is expected to catch all UltraSPARC flavors prior T1 */
  63         if (!strcmp (name,"SUNW,UltraSPARC") ||
  64             !strncmp(name,"SUNW,UltraSPARC-I",17))  /* covers II,III,IV */
  65                 {
  66                 OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU|SPARCV9_VIS1;
  67
  68                 /* %tick is privileged only on UltraSPARC-I/II, but not IIe */
  69                 if (name[14]!='\0' && name[17]!='\0' && name[18]!='\0')
  70                         OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
  71
  72                 return DI_WALK_TERMINATE;
  73                 }
  74         /* This is expected to catch remaining UltraSPARCs, such as T1 */
  75         else if (!strncmp(name,"SUNW,UltraSPARC",15))
  76                 {
  77                 OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
  78
  79                 return DI_WALK_TERMINATE;
  80                 }
  81
  82         return DI_WALK_CONTINUE;
  83         }
  84
  85 void OPENSSL_cpuid_setup(void)
  86         {
  87         void *h;
  88         char *e,si[256];
  89         static int trigger=0;
  90
  91         if (trigger) return;
  92         trigger=1;
  93
  94         if ((e=getenv("OPENSSL_sparcv9cap")))
  95                 {
  96                 OPENSSL_sparcv9cap_P=strtoul(e,NULL,0);
  97                 return;
  98                 }
  99
 100         if (sysinfo(SI_MACHINE,si,sizeof(si))>0)
 101                 {
 102                 if (strcmp(si,"sun4v"))
 103                         /* FPU is preferred for all CPUs, but US-T1/2 */
 104                         OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU;
 105                 }
 106
 107         if (sysinfo(SI_ISALIST,si,sizeof(si))>0)
 108                 {
 109                 if (strstr(si,"+vis"))
 110                         OPENSSL_sparcv9cap_P |= SPARCV9_VIS1;
 111                 if (strstr(si,"+vis2"))
 112                         {
 113                         OPENSSL_sparcv9cap_P |= SPARCV9_VIS2;
 114                         OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
 115                         return;
 116                         }
 117                 }
 118
 119         if ((h = dlopen("libdevinfo.so.1",RTLD_LAZY))) do
 120                 {
 121                 di_init_t       di_init;
 122                 di_fini_t       di_fini;
 123                 di_walk_node_t  di_walk_node;
 124                 di_node_name_t  di_node_name;
 125                 di_node_t       root_node;
 126
 127                 if (!DLLINK(h,di_init))         break;
 128                 if (!DLLINK(h,di_fini))         break;
 129                 if (!DLLINK(h,di_walk_node))    break;
 130                 if (!DLLINK(h,di_node_name))    break;
 131
 132                 if ((root_node = (*di_init)("/",DINFOSUBTREE))!=DI_NODE_NIL)
 133                         {
 134                         (*di_walk_node)(root_node,DI_WALK_SIBFIRST,
 135                                         di_node_name,walk_nodename);
 136                         (*di_fini)(root_node);
 137                         }
 138                 } while(0);
 139
 140         if (h) dlclose(h);
 141         }
 142
 143 #else
 144
 145 static sigjmp_buf common_jmp;
 146 static void common_handler(int sig) { siglongjmp(common_jmp,sig); }
 147
 148 void OPENSSL_cpuid_setup(void)
 149         {
 150         char *e;
 151         struct sigaction        common_act,ill_oact,bus_oact;
 152         sigset_t                all_masked,oset;
 153         unsigned long           oasi;
 154         int                     sig;
 155
 156         if ((e=getenv("OPENSSL_sparcv9cap")))
 157                 {
 158                 OPENSSL_sparcv9cap_P=strtoul(e,NULL,0);
 159                 return;
 160                 }
 161
 162         /* For now we assume that the rest supports UltraSPARC-I* only */
 163         OPENSSL_sparcv9cap_P |= SPARCV9_PREFER_FPU|SPARCV9_VIS1;
 164
 165         sigfillset(&all_masked);
 166         sigdelset(&all_masked,SIGILL);
 167         sigdelset(&all_masked,SIGTRAP);
 168 #ifdef SIGEMT
 169         sigdelset(&all_masked,SIGEMT);
 170 #endif
 171         sigdelset(&all_masked,SIGFPE);
 172         sigdelset(&all_masked,SIGBUS);
 173         sigdelset(&all_masked,SIGSEGV);
 174         sigprocmask(SIG_SETMASK,&all_masked,&oset);
 175
 176         memset(&common_act,0,sizeof(common_act));
 177         common_act.sa_handler = common_handler;
 178         common_act.sa_mask    = all_masked;
 179
 180         sigaction(SIGILL,&common_act,&ill_oact);
 181         sigaction(SIGBUS,&common_act,&bus_oact);/* T1 fails 16-bit ldda */
 182         oasi = _sparcv9_rdwrasi(0xD2);          /* ASI_FL16_P */
 183         if ((sig=sigsetjmp(common_jmp,0)) == 0)
 184                 {
 185                 _sparcv9_vis1_probe();
 186                 OPENSSL_sparcv9cap_P |= SPARCV9_VIS1;
 187                 }
 188         else if (sig == SIGBUS)                 /* T1 fails 16-bit ldda */
 189                 {
 190                 OPENSSL_sparcv9cap_P &= ~SPARCV9_PREFER_FPU;
 191                 }
 192         else
 193                 {
 194                 OPENSSL_sparcv9cap_P &= ~SPARCV9_VIS1;
 195                 }
 196         _sparcv9_rdwrasi(oasi);
 197         sigaction(SIGBUS,&bus_oact,NULL);
 198         sigaction(SIGILL,&ill_oact,NULL);
 199
 200         sigaction(SIGILL,&common_act,&ill_oact);
 201         if (sigsetjmp(common_jmp,0) == 0)
 202                 {
 203                 _sparcv9_rdtick();
 204                 OPENSSL_sparcv9cap_P &= ~SPARCV9_TICK_PRIVILEGED;
 205                 }
 206         else
 207                 {
 208                 OPENSSL_sparcv9cap_P |= SPARCV9_TICK_PRIVILEGED;
 209                 }
 210         sigaction(SIGILL,&ill_oact,NULL);
 211
 212         sigprocmask(SIG_SETMASK,&oset,NULL);
 213         }
 214
 215 #endif