1 /* 2 * Copyright 2005-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <stdio.h> 11 #include <stdlib.h> 12 #include <string.h> 13 #include <setjmp.h> 14 #include <signal.h> 15 #include <sys/time.h> 16 #include <unistd.h> 17 #include <openssl/bn.h> 18 #include "internal/cryptlib.h" 19 20 #include "sparc_arch.h" 21 22 #if defined(__GNUC__) && defined(__linux) 23 __attribute__ ((visibility("hidden"))) 24 #endif 25 unsigned int OPENSSL_sparcv9cap_P[2] = { SPARCV9_TICK_PRIVILEGED, 0 }; 26 27 int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, 28 const BN_ULONG *np, const BN_ULONG *n0, int num) 29 { 30 int bn_mul_mont_vis3(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, 31 const BN_ULONG *np, const BN_ULONG *n0, int num); 32 int bn_mul_mont_fpu(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, 33 const BN_ULONG *np, const BN_ULONG *n0, int num); 34 int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, 35 const BN_ULONG *np, const BN_ULONG *n0, int num); 36 37 if (!(num & 1) && num >= 6) { 38 if ((num & 15) == 0 && num <= 64 && 39 (OPENSSL_sparcv9cap_P[1] & (CFR_MONTMUL | CFR_MONTSQR)) == 40 (CFR_MONTMUL | CFR_MONTSQR)) { 41 typedef int (*bn_mul_mont_f) (BN_ULONG *rp, const BN_ULONG *ap, 42 const BN_ULONG *bp, 43 const BN_ULONG *np, 44 const BN_ULONG *n0); 45 int bn_mul_mont_t4_8(BN_ULONG *rp, const BN_ULONG *ap, 46 const BN_ULONG *bp, const BN_ULONG *np, 47 const BN_ULONG *n0); 48 int bn_mul_mont_t4_16(BN_ULONG *rp, const BN_ULONG *ap, 49 const BN_ULONG *bp, const BN_ULONG *np, 50 const BN_ULONG *n0); 51 int bn_mul_mont_t4_24(BN_ULONG *rp, const BN_ULONG *ap, 52 const BN_ULONG *bp, const BN_ULONG *np, 53 const BN_ULONG *n0); 54 int bn_mul_mont_t4_32(BN_ULONG *rp, const BN_ULONG *ap, 55 const BN_ULONG *bp, const BN_ULONG *np, 56 const BN_ULONG *n0); 57 static const bn_mul_mont_f funcs[4] = { 58 bn_mul_mont_t4_8, bn_mul_mont_t4_16, 59 bn_mul_mont_t4_24, bn_mul_mont_t4_32 60 }; 61 bn_mul_mont_f worker = funcs[num / 16 - 1]; 62 63 if ((*worker) (rp, ap, bp, np, n0)) 64 return 1; 65 /* retry once and fall back */ 66 if ((*worker) (rp, ap, bp, np, n0)) 67 return 1; 68 return bn_mul_mont_vis3(rp, ap, bp, np, n0, num); 69 } 70 if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3)) 71 return bn_mul_mont_vis3(rp, ap, bp, np, n0, num); 72 else if (num >= 8 && 73 /* 74 * bn_mul_mont_fpu doesn't use FMADD, we just use the 75 * flag to detect when FPU path is preferable in cases 76 * when current heuristics is unreliable. [it works 77 * out because FMADD-capable processors where FPU 78 * code path is undesirable are also VIS3-capable and 79 * VIS3 code path takes precedence.] 80 */ 81 ( (OPENSSL_sparcv9cap_P[0] & SPARCV9_FMADD) || 82 (OPENSSL_sparcv9cap_P[0] & 83 (SPARCV9_PREFER_FPU | SPARCV9_VIS1)) == 84 (SPARCV9_PREFER_FPU | SPARCV9_VIS1) )) 85 return bn_mul_mont_fpu(rp, ap, bp, np, n0, num); 86 } 87 return bn_mul_mont_int(rp, ap, bp, np, n0, num); 88 } 89 90 unsigned long _sparcv9_rdtick(void); 91 void _sparcv9_vis1_probe(void); 92 unsigned long _sparcv9_vis1_instrument(void); 93 void _sparcv9_vis2_probe(void); 94 void _sparcv9_fmadd_probe(void); 95 unsigned long _sparcv9_rdcfr(void); 96 void _sparcv9_vis3_probe(void); 97 void _sparcv9_fjaesx_probe(void); 98 unsigned long _sparcv9_random(void); 99 size_t _sparcv9_vis1_instrument_bus(unsigned int *, size_t); 100 size_t _sparcv9_vis1_instrument_bus2(unsigned int *, size_t, size_t); 101 102 uint32_t OPENSSL_rdtsc(void) 103 { 104 if (OPENSSL_sparcv9cap_P[0] & SPARCV9_TICK_PRIVILEGED) 105 #if defined(__sun) && defined(__SVR4) 106 return gethrtime(); 107 #else 108 return 0; 109 #endif 110 else 111 return _sparcv9_rdtick(); 112 } 113 114 size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt) 115 { 116 if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) == 117 SPARCV9_BLK) 118 return _sparcv9_vis1_instrument_bus(out, cnt); 119 else 120 return 0; 121 } 122 123 size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max) 124 { 125 if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) == 126 SPARCV9_BLK) 127 return _sparcv9_vis1_instrument_bus2(out, cnt, max); 128 else 129 return 0; 130 } 131 132 static sigjmp_buf common_jmp; 133 static void common_handler(int sig) 134 { 135 siglongjmp(common_jmp, sig); 136 } 137 138 #if defined(__sun) && defined(__SVR4) 139 # if defined(__GNUC__) && __GNUC__>=2 140 extern unsigned int getisax(unsigned int vec[], unsigned int sz) __attribute__ ((weak)); 141 # elif defined(__SUNPRO_C) 142 #pragma weak getisax 143 extern unsigned int getisax(unsigned int vec[], unsigned int sz); 144 # else 145 static unsigned int (*getisax) (unsigned int vec[], unsigned int sz) = NULL; 146 # endif 147 #endif 148 149 void OPENSSL_cpuid_setup(void) 150 { 151 char *e; 152 struct sigaction common_act, ill_oact, bus_oact; 153 sigset_t all_masked, oset; 154 static int trigger = 0; 155 156 if (trigger) 157 return; 158 trigger = 1; 159 160 if ((e = getenv("OPENSSL_sparcv9cap"))) { 161 OPENSSL_sparcv9cap_P[0] = strtoul(e, NULL, 0); 162 if ((e = strchr(e, ':'))) 163 OPENSSL_sparcv9cap_P[1] = strtoul(e + 1, NULL, 0); 164 return; 165 } 166 167 #if defined(__sun) && defined(__SVR4) 168 if (getisax != NULL) { 169 unsigned int vec[2] = { 0, 0 }; 170 171 if (getisax (vec,2)) { 172 if (vec[0]&0x00020) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1; 173 if (vec[0]&0x00040) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2; 174 if (vec[0]&0x00080) OPENSSL_sparcv9cap_P[0] |= SPARCV9_BLK; 175 if (vec[0]&0x00100) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD; 176 if (vec[0]&0x00400) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3; 177 if (vec[0]&0x01000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJHPCACE; 178 if (vec[0]&0x02000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJDESX; 179 if (vec[0]&0x08000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_IMA; 180 if (vec[0]&0x10000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX; 181 if (vec[1]&0x00008) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS4; 182 183 /* reconstruct %cfr copy */ 184 OPENSSL_sparcv9cap_P[1] = (vec[0]>>17)&0x3ff; 185 OPENSSL_sparcv9cap_P[1] |= (OPENSSL_sparcv9cap_P[1]&CFR_MONTMUL)<<1; 186 if (vec[0]&0x20000000) OPENSSL_sparcv9cap_P[1] |= CFR_CRC32C; 187 if (vec[1]&0x00000020) OPENSSL_sparcv9cap_P[1] |= CFR_XMPMUL; 188 if (vec[1]&0x00000040) 189 OPENSSL_sparcv9cap_P[1] |= CFR_XMONTMUL|CFR_XMONTSQR; 190 191 /* Some heuristics */ 192 /* all known VIS2-capable CPUs have unprivileged tick counter */ 193 if (OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS2) 194 OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED; 195 196 OPENSSL_sparcv9cap_P[0] |= SPARCV9_PREFER_FPU; 197 198 /* detect UltraSPARC-Tx, see sparccpud.S for details... */ 199 if ((OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS1) && 200 _sparcv9_vis1_instrument() >= 12) 201 OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU); 202 } 203 204 if (sizeof(size_t) == 8) 205 OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK; 206 207 return; 208 } 209 #endif 210 211 /* Initial value, fits UltraSPARC-I&II... */ 212 OPENSSL_sparcv9cap_P[0] = SPARCV9_PREFER_FPU | SPARCV9_TICK_PRIVILEGED; 213 214 sigfillset(&all_masked); 215 sigdelset(&all_masked, SIGILL); 216 sigdelset(&all_masked, SIGTRAP); 217 # ifdef SIGEMT 218 sigdelset(&all_masked, SIGEMT); 219 # endif 220 sigdelset(&all_masked, SIGFPE); 221 sigdelset(&all_masked, SIGBUS); 222 sigdelset(&all_masked, SIGSEGV); 223 sigprocmask(SIG_SETMASK, &all_masked, &oset); 224 225 memset(&common_act, 0, sizeof(common_act)); 226 common_act.sa_handler = common_handler; 227 common_act.sa_mask = all_masked; 228 229 sigaction(SIGILL, &common_act, &ill_oact); 230 sigaction(SIGBUS, &common_act, &bus_oact); /* T1 fails 16-bit ldda [on 231 * Linux] */ 232 233 if (sigsetjmp(common_jmp, 1) == 0) { 234 _sparcv9_rdtick(); 235 OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED; 236 } 237 238 if (sigsetjmp(common_jmp, 1) == 0) { 239 _sparcv9_vis1_probe(); 240 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1 | SPARCV9_BLK; 241 /* detect UltraSPARC-Tx, see sparccpud.S for details... */ 242 if (_sparcv9_vis1_instrument() >= 12) 243 OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU); 244 else { 245 _sparcv9_vis2_probe(); 246 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2; 247 } 248 } 249 250 if (sigsetjmp(common_jmp, 1) == 0) { 251 _sparcv9_fmadd_probe(); 252 OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD; 253 } 254 255 /* 256 * VIS3 flag is tested independently from VIS1, unlike VIS2 that is, 257 * because VIS3 defines even integer instructions. 258 */ 259 if (sigsetjmp(common_jmp, 1) == 0) { 260 _sparcv9_vis3_probe(); 261 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3; 262 } 263 264 if (sigsetjmp(common_jmp, 1) == 0) { 265 _sparcv9_fjaesx_probe(); 266 OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX; 267 } 268 269 /* 270 * In wait for better solution _sparcv9_rdcfr is masked by 271 * VIS3 flag, because it goes to uninterruptable endless 272 * loop on UltraSPARC II running Solaris. Things might be 273 * different on Linux... 274 */ 275 if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3) && 276 sigsetjmp(common_jmp, 1) == 0) { 277 OPENSSL_sparcv9cap_P[1] = (unsigned int)_sparcv9_rdcfr(); 278 } 279 280 sigaction(SIGBUS, &bus_oact, NULL); 281 sigaction(SIGILL, &ill_oact, NULL); 282 283 sigprocmask(SIG_SETMASK, &oset, NULL); 284 285 if (sizeof(size_t) == 8) 286 OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK; 287 # ifdef __linux 288 else { 289 int ret = syscall(340); 290 291 if (ret >= 0 && ret & 1) 292 OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK; 293 } 294 # endif 295 } 296