1 /* 2 * Copyright 2005-2021 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 #include "bn/bn_local.h" /* for definition of bn_mul_mont */ 20 21 #include "sparc_arch.h" 22 23 #if defined(__GNUC__) && defined(__linux) 24 __attribute__ ((visibility("hidden"))) 25 #endif 26 unsigned int OPENSSL_sparcv9cap_P[2] = { SPARCV9_TICK_PRIVILEGED, 0 }; 27 28 int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, 29 const BN_ULONG *np, const BN_ULONG *n0, int num) 30 { 31 int bn_mul_mont_vis3(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, 32 const BN_ULONG *np, const BN_ULONG *n0, int num); 33 int bn_mul_mont_fpu(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, 34 const BN_ULONG *np, const BN_ULONG *n0, int num); 35 int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, 36 const BN_ULONG *np, const BN_ULONG *n0, int num); 37 38 if (!(num & 1) && num >= 6) { 39 if ((num & 15) == 0 && num <= 64 && 40 (OPENSSL_sparcv9cap_P[1] & (CFR_MONTMUL | CFR_MONTSQR)) == 41 (CFR_MONTMUL | CFR_MONTSQR)) { 42 typedef int (*bn_mul_mont_f) (BN_ULONG *rp, const BN_ULONG *ap, 43 const BN_ULONG *bp, 44 const BN_ULONG *np, 45 const BN_ULONG *n0); 46 int bn_mul_mont_t4_8(BN_ULONG *rp, const BN_ULONG *ap, 47 const BN_ULONG *bp, const BN_ULONG *np, 48 const BN_ULONG *n0); 49 int bn_mul_mont_t4_16(BN_ULONG *rp, const BN_ULONG *ap, 50 const BN_ULONG *bp, const BN_ULONG *np, 51 const BN_ULONG *n0); 52 int bn_mul_mont_t4_24(BN_ULONG *rp, const BN_ULONG *ap, 53 const BN_ULONG *bp, const BN_ULONG *np, 54 const BN_ULONG *n0); 55 int bn_mul_mont_t4_32(BN_ULONG *rp, const BN_ULONG *ap, 56 const BN_ULONG *bp, const BN_ULONG *np, 57 const BN_ULONG *n0); 58 static const bn_mul_mont_f funcs[4] = { 59 bn_mul_mont_t4_8, bn_mul_mont_t4_16, 60 bn_mul_mont_t4_24, bn_mul_mont_t4_32 61 }; 62 bn_mul_mont_f worker = funcs[num / 16 - 1]; 63 64 if ((*worker) (rp, ap, bp, np, n0)) 65 return 1; 66 /* retry once and fall back */ 67 if ((*worker) (rp, ap, bp, np, n0)) 68 return 1; 69 return bn_mul_mont_vis3(rp, ap, bp, np, n0, num); 70 } 71 if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3)) 72 return bn_mul_mont_vis3(rp, ap, bp, np, n0, num); 73 else if (num >= 8 && 74 /* 75 * bn_mul_mont_fpu doesn't use FMADD, we just use the 76 * flag to detect when FPU path is preferable in cases 77 * when current heuristics is unreliable. [it works 78 * out because FMADD-capable processors where FPU 79 * code path is undesirable are also VIS3-capable and 80 * VIS3 code path takes precedence.] 81 */ 82 ( (OPENSSL_sparcv9cap_P[0] & SPARCV9_FMADD) || 83 (OPENSSL_sparcv9cap_P[0] & 84 (SPARCV9_PREFER_FPU | SPARCV9_VIS1)) == 85 (SPARCV9_PREFER_FPU | SPARCV9_VIS1) )) 86 return bn_mul_mont_fpu(rp, ap, bp, np, n0, num); 87 } 88 return bn_mul_mont_int(rp, ap, bp, np, n0, num); 89 } 90 91 unsigned long _sparcv9_rdtick(void); 92 void _sparcv9_vis1_probe(void); 93 unsigned long _sparcv9_vis1_instrument(void); 94 void _sparcv9_vis2_probe(void); 95 void _sparcv9_fmadd_probe(void); 96 unsigned long _sparcv9_rdcfr(void); 97 void _sparcv9_vis3_probe(void); 98 void _sparcv9_fjaesx_probe(void); 99 unsigned long _sparcv9_random(void); 100 size_t _sparcv9_vis1_instrument_bus(unsigned int *, size_t); 101 size_t _sparcv9_vis1_instrument_bus2(unsigned int *, size_t, size_t); 102 103 uint32_t OPENSSL_rdtsc(void) 104 { 105 if (OPENSSL_sparcv9cap_P[0] & SPARCV9_TICK_PRIVILEGED) 106 #if defined(__sun) && defined(__SVR4) 107 return gethrtime(); 108 #else 109 return 0; 110 #endif 111 else 112 return _sparcv9_rdtick(); 113 } 114 115 size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt) 116 { 117 if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) == 118 SPARCV9_BLK) 119 return _sparcv9_vis1_instrument_bus(out, cnt); 120 else 121 return 0; 122 } 123 124 size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max) 125 { 126 if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) == 127 SPARCV9_BLK) 128 return _sparcv9_vis1_instrument_bus2(out, cnt, max); 129 else 130 return 0; 131 } 132 133 static sigjmp_buf common_jmp; 134 static void common_handler(int sig) 135 { 136 siglongjmp(common_jmp, sig); 137 } 138 139 #if defined(__sun) && defined(__SVR4) 140 # if defined(__GNUC__) && __GNUC__>=2 141 extern unsigned int getisax(unsigned int vec[], unsigned int sz) __attribute__ ((weak)); 142 # elif defined(__SUNPRO_C) 143 #pragma weak getisax 144 extern unsigned int getisax(unsigned int vec[], unsigned int sz); 145 # else 146 static unsigned int (*getisax) (unsigned int vec[], unsigned int sz) = NULL; 147 # endif 148 #endif 149 150 void OPENSSL_cpuid_setup(void) 151 { 152 char *e; 153 struct sigaction common_act, ill_oact, bus_oact; 154 sigset_t all_masked, oset; 155 static int trigger = 0; 156 157 if (trigger) 158 return; 159 trigger = 1; 160 161 if ((e = getenv("OPENSSL_sparcv9cap"))) { 162 OPENSSL_sparcv9cap_P[0] = strtoul(e, NULL, 0); 163 if ((e = strchr(e, ':'))) 164 OPENSSL_sparcv9cap_P[1] = strtoul(e + 1, NULL, 0); 165 return; 166 } 167 168 #if defined(__sun) && defined(__SVR4) 169 if (getisax != NULL) { 170 unsigned int vec[2] = { 0, 0 }; 171 172 if (getisax (vec,2)) { 173 if (vec[0]&0x00020) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1; 174 if (vec[0]&0x00040) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2; 175 if (vec[0]&0x00080) OPENSSL_sparcv9cap_P[0] |= SPARCV9_BLK; 176 if (vec[0]&0x00100) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD; 177 if (vec[0]&0x00400) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3; 178 if (vec[0]&0x01000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJHPCACE; 179 if (vec[0]&0x02000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJDESX; 180 if (vec[0]&0x08000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_IMA; 181 if (vec[0]&0x10000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX; 182 if (vec[1]&0x00008) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS4; 183 184 /* reconstruct %cfr copy */ 185 OPENSSL_sparcv9cap_P[1] = (vec[0]>>17)&0x3ff; 186 OPENSSL_sparcv9cap_P[1] |= (OPENSSL_sparcv9cap_P[1]&CFR_MONTMUL)<<1; 187 if (vec[0]&0x20000000) OPENSSL_sparcv9cap_P[1] |= CFR_CRC32C; 188 if (vec[1]&0x00000020) OPENSSL_sparcv9cap_P[1] |= CFR_XMPMUL; 189 if (vec[1]&0x00000040) 190 OPENSSL_sparcv9cap_P[1] |= CFR_XMONTMUL|CFR_XMONTSQR; 191 192 /* Some heuristics */ 193 /* all known VIS2-capable CPUs have unprivileged tick counter */ 194 if (OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS2) 195 OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED; 196 197 OPENSSL_sparcv9cap_P[0] |= SPARCV9_PREFER_FPU; 198 199 /* detect UltraSPARC-Tx, see sparccpud.S for details... */ 200 if ((OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS1) && 201 _sparcv9_vis1_instrument() >= 12) 202 OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU); 203 } 204 205 if (sizeof(size_t) == 8) 206 OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK; 207 208 return; 209 } 210 #endif 211 212 /* Initial value, fits UltraSPARC-I&II... */ 213 OPENSSL_sparcv9cap_P[0] = SPARCV9_PREFER_FPU | SPARCV9_TICK_PRIVILEGED; 214 215 sigfillset(&all_masked); 216 sigdelset(&all_masked, SIGILL); 217 sigdelset(&all_masked, SIGTRAP); 218 # ifdef SIGEMT 219 sigdelset(&all_masked, SIGEMT); 220 # endif 221 sigdelset(&all_masked, SIGFPE); 222 sigdelset(&all_masked, SIGBUS); 223 sigdelset(&all_masked, SIGSEGV); 224 sigprocmask(SIG_SETMASK, &all_masked, &oset); 225 226 memset(&common_act, 0, sizeof(common_act)); 227 common_act.sa_handler = common_handler; 228 common_act.sa_mask = all_masked; 229 230 sigaction(SIGILL, &common_act, &ill_oact); 231 sigaction(SIGBUS, &common_act, &bus_oact); /* T1 fails 16-bit ldda [on 232 * Linux] */ 233 234 if (sigsetjmp(common_jmp, 1) == 0) { 235 _sparcv9_rdtick(); 236 OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED; 237 } 238 239 if (sigsetjmp(common_jmp, 1) == 0) { 240 _sparcv9_vis1_probe(); 241 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1 | SPARCV9_BLK; 242 /* detect UltraSPARC-Tx, see sparccpud.S for details... */ 243 if (_sparcv9_vis1_instrument() >= 12) 244 OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU); 245 else { 246 _sparcv9_vis2_probe(); 247 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2; 248 } 249 } 250 251 if (sigsetjmp(common_jmp, 1) == 0) { 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 _sparcv9_vis3_probe(); 262 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3; 263 } 264 265 if (sigsetjmp(common_jmp, 1) == 0) { 266 _sparcv9_fjaesx_probe(); 267 OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX; 268 } 269 270 /* 271 * In wait for better solution _sparcv9_rdcfr is masked by 272 * VIS3 flag, because it goes to uninterruptible endless 273 * loop on UltraSPARC II running Solaris. Things might be 274 * different on Linux... 275 */ 276 if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3) && 277 sigsetjmp(common_jmp, 1) == 0) { 278 OPENSSL_sparcv9cap_P[1] = (unsigned int)_sparcv9_rdcfr(); 279 } 280 281 sigaction(SIGBUS, &bus_oact, NULL); 282 sigaction(SIGILL, &ill_oact, NULL); 283 284 sigprocmask(SIG_SETMASK, &oset, NULL); 285 286 if (sizeof(size_t) == 8) 287 OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK; 288 # ifdef __linux 289 else { 290 int ret = syscall(340); 291 292 if (ret >= 0 && ret & 1) 293 OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK; 294 } 295 # endif 296 } 297
Indexes created Sat Feb 28 05:31:39 UTC 2026