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