1 /*
2 * Copyright 2005-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 "crypto/sparc_arch.h"
20
21 #if defined(__GNUC__) && defined(__linux)
22 __attribute__ ((visibility("hidden")))
23 #endif
24 unsigned int OPENSSL_sparcv9cap_P[2] = { SPARCV9_TICK_PRIVILEGED, 0 };
25
26 unsigned long _sparcv9_rdtick(void);
27 void _sparcv9_vis1_probe(void);
28 unsigned long _sparcv9_vis1_instrument(void);
29 void _sparcv9_vis2_probe(void);
30 void _sparcv9_fmadd_probe(void);
31 unsigned long _sparcv9_rdcfr(void);
32 void _sparcv9_vis3_probe(void);
33 void _sparcv9_fjaesx_probe(void);
34 unsigned long _sparcv9_random(void);
35 size_t _sparcv9_vis1_instrument_bus(unsigned int *, size_t);
36 size_t _sparcv9_vis1_instrument_bus2(unsigned int *, size_t, size_t);
37
OPENSSL_rdtsc(void)38 uint32_t OPENSSL_rdtsc(void)
39 {
40 if (OPENSSL_sparcv9cap_P[0] & SPARCV9_TICK_PRIVILEGED)
41 #if defined(__sun) && defined(__SVR4)
42 return gethrtime();
43 #else
44 return 0;
45 #endif
46 else
47 return _sparcv9_rdtick();
48 }
49
OPENSSL_instrument_bus(unsigned int * out,size_t cnt)50 size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
51 {
52 if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) ==
53 SPARCV9_BLK)
54 return _sparcv9_vis1_instrument_bus(out, cnt);
55 else
56 return 0;
57 }
58
OPENSSL_instrument_bus2(unsigned int * out,size_t cnt,size_t max)59 size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
60 {
61 if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) ==
62 SPARCV9_BLK)
63 return _sparcv9_vis1_instrument_bus2(out, cnt, max);
64 else
65 return 0;
66 }
67
68 static sigjmp_buf common_jmp;
common_handler(int sig)69 static void common_handler(int sig)
70 {
71 siglongjmp(common_jmp, sig);
72 }
73
74 #if defined(__sun) && defined(__SVR4)
75 # if defined(__GNUC__) && __GNUC__>=2
76 extern unsigned int getisax(unsigned int vec[], unsigned int sz) __attribute__ ((weak));
77 # elif defined(__SUNPRO_C)
78 #pragma weak getisax
79 extern unsigned int getisax(unsigned int vec[], unsigned int sz);
80 # else
81 static unsigned int (*getisax) (unsigned int vec[], unsigned int sz) = NULL;
82 # endif
83 #endif
84
OPENSSL_cpuid_setup(void)85 void OPENSSL_cpuid_setup(void)
86 {
87 char *e;
88 struct sigaction common_act, ill_oact, bus_oact;
89 sigset_t all_masked, oset;
90 static int trigger = 0;
91
92 if (trigger)
93 return;
94 trigger = 1;
95
96 if ((e = getenv("OPENSSL_sparcv9cap"))) {
97 OPENSSL_sparcv9cap_P[0] = strtoul(e, NULL, 0);
98 if ((e = strchr(e, ':')))
99 OPENSSL_sparcv9cap_P[1] = strtoul(e + 1, NULL, 0);
100 return;
101 }
102
103 #if defined(__sun) && defined(__SVR4)
104 if (getisax != NULL) {
105 unsigned int vec[2] = { 0, 0 };
106
107 if (getisax (vec,2)) {
108 if (vec[0]&0x00020) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1;
109 if (vec[0]&0x00040) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;
110 if (vec[0]&0x00080) OPENSSL_sparcv9cap_P[0] |= SPARCV9_BLK;
111 if (vec[0]&0x00100) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD;
112 if (vec[0]&0x00400) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3;
113 if (vec[0]&0x01000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJHPCACE;
114 if (vec[0]&0x02000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJDESX;
115 if (vec[0]&0x08000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_IMA;
116 if (vec[0]&0x10000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX;
117 if (vec[1]&0x00008) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS4;
118
119 /* reconstruct %cfr copy */
120 OPENSSL_sparcv9cap_P[1] = (vec[0]>>17)&0x3ff;
121 OPENSSL_sparcv9cap_P[1] |= (OPENSSL_sparcv9cap_P[1]&CFR_MONTMUL)<<1;
122 if (vec[0]&0x20000000) OPENSSL_sparcv9cap_P[1] |= CFR_CRC32C;
123 if (vec[1]&0x00000020) OPENSSL_sparcv9cap_P[1] |= CFR_XMPMUL;
124 if (vec[1]&0x00000040)
125 OPENSSL_sparcv9cap_P[1] |= CFR_XMONTMUL|CFR_XMONTSQR;
126
127 /* Some heuristics */
128 /* all known VIS2-capable CPUs have unprivileged tick counter */
129 if (OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS2)
130 OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
131
132 OPENSSL_sparcv9cap_P[0] |= SPARCV9_PREFER_FPU;
133
134 /* detect UltraSPARC-Tx, see sparccpud.S for details... */
135 if ((OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS1) &&
136 _sparcv9_vis1_instrument() >= 12)
137 OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU);
138 }
139
140 if (sizeof(size_t) == 8)
141 OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
142
143 return;
144 }
145 #endif
146
147 /* Initial value, fits UltraSPARC-I&II... */
148 OPENSSL_sparcv9cap_P[0] = SPARCV9_PREFER_FPU | SPARCV9_TICK_PRIVILEGED;
149
150 sigfillset(&all_masked);
151 sigdelset(&all_masked, SIGILL);
152 sigdelset(&all_masked, SIGTRAP);
153 # ifdef SIGEMT
154 sigdelset(&all_masked, SIGEMT);
155 # endif
156 sigdelset(&all_masked, SIGFPE);
157 sigdelset(&all_masked, SIGBUS);
158 sigdelset(&all_masked, SIGSEGV);
159 sigprocmask(SIG_SETMASK, &all_masked, &oset);
160
161 memset(&common_act, 0, sizeof(common_act));
162 common_act.sa_handler = common_handler;
163 common_act.sa_mask = all_masked;
164
165 sigaction(SIGILL, &common_act, &ill_oact);
166 sigaction(SIGBUS, &common_act, &bus_oact); /* T1 fails 16-bit ldda [on
167 * Linux] */
168
169 if (sigsetjmp(common_jmp, 1) == 0) {
170 _sparcv9_rdtick();
171 OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
172 }
173
174 if (sigsetjmp(common_jmp, 1) == 0) {
175 _sparcv9_vis1_probe();
176 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1 | SPARCV9_BLK;
177 /* detect UltraSPARC-Tx, see sparccpud.S for details... */
178 if (_sparcv9_vis1_instrument() >= 12)
179 OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU);
180 else {
181 _sparcv9_vis2_probe();
182 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;
183 }
184 }
185
186 if (sigsetjmp(common_jmp, 1) == 0) {
187 _sparcv9_fmadd_probe();
188 OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD;
189 }
190
191 /*
192 * VIS3 flag is tested independently from VIS1, unlike VIS2 that is,
193 * because VIS3 defines even integer instructions.
194 */
195 if (sigsetjmp(common_jmp, 1) == 0) {
196 _sparcv9_vis3_probe();
197 OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3;
198 }
199
200 if (sigsetjmp(common_jmp, 1) == 0) {
201 _sparcv9_fjaesx_probe();
202 OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX;
203 }
204
205 /*
206 * In wait for better solution _sparcv9_rdcfr is masked by
207 * VIS3 flag, because it goes to uninterruptible endless
208 * loop on UltraSPARC II running Solaris. Things might be
209 * different on Linux...
210 */
211 if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3) &&
212 sigsetjmp(common_jmp, 1) == 0) {
213 OPENSSL_sparcv9cap_P[1] = (unsigned int)_sparcv9_rdcfr();
214 }
215
216 sigaction(SIGBUS, &bus_oact, NULL);
217 sigaction(SIGILL, &ill_oact, NULL);
218
219 sigprocmask(SIG_SETMASK, &oset, NULL);
220
221 if (sizeof(size_t) == 8)
222 OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
223 # ifdef __linux
224 else {
225 int ret = syscall(340);
226
227 if (ret >= 0 && ret & 1)
228 OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
229 }
230 # endif
231 }
232
