1 /*
2 * Copyright 2009-2021 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 <unistd.h>
16 #if defined(__linux) || defined(_AIX)
17 # include <sys/utsname.h>
18 #endif
19 #if defined(_AIX53) /* defined even on post-5.3 */
20 # include <sys/systemcfg.h>
21 # if !defined(__power_set)
22 # define __power_set(a) (_system_configuration.implementation & (a))
23 # endif
24 #endif
25 #if defined(__APPLE__) && defined(__MACH__)
26 # include <sys/types.h>
27 # include <sys/sysctl.h>
28 #endif
29 #include <openssl/crypto.h>
30 #include "internal/cryptlib.h"
31 #include "crypto/ppc_arch.h"
32
33 unsigned int OPENSSL_ppccap_P = 0;
34
35 static sigset_t all_masked;
36
37 static sigjmp_buf ill_jmp;
ill_handler(int sig)38 static void ill_handler(int sig)
39 {
40 siglongjmp(ill_jmp, sig);
41 }
42
43 void OPENSSL_fpu_probe(void);
44 void OPENSSL_ppc64_probe(void);
45 void OPENSSL_altivec_probe(void);
46 void OPENSSL_crypto207_probe(void);
47 void OPENSSL_madd300_probe(void);
48
49 long OPENSSL_rdtsc_mftb(void);
50 long OPENSSL_rdtsc_mfspr268(void);
51
OPENSSL_rdtsc(void)52 uint32_t OPENSSL_rdtsc(void)
53 {
54 if (OPENSSL_ppccap_P & PPC_MFTB)
55 return OPENSSL_rdtsc_mftb();
56 else if (OPENSSL_ppccap_P & PPC_MFSPR268)
57 return OPENSSL_rdtsc_mfspr268();
58 else
59 return 0;
60 }
61
62 size_t OPENSSL_instrument_bus_mftb(unsigned int *, size_t);
63 size_t OPENSSL_instrument_bus_mfspr268(unsigned int *, size_t);
64
OPENSSL_instrument_bus(unsigned int * out,size_t cnt)65 size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
66 {
67 if (OPENSSL_ppccap_P & PPC_MFTB)
68 return OPENSSL_instrument_bus_mftb(out, cnt);
69 else if (OPENSSL_ppccap_P & PPC_MFSPR268)
70 return OPENSSL_instrument_bus_mfspr268(out, cnt);
71 else
72 return 0;
73 }
74
75 size_t OPENSSL_instrument_bus2_mftb(unsigned int *, size_t, size_t);
76 size_t OPENSSL_instrument_bus2_mfspr268(unsigned int *, size_t, size_t);
77
OPENSSL_instrument_bus2(unsigned int * out,size_t cnt,size_t max)78 size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
79 {
80 if (OPENSSL_ppccap_P & PPC_MFTB)
81 return OPENSSL_instrument_bus2_mftb(out, cnt, max);
82 else if (OPENSSL_ppccap_P & PPC_MFSPR268)
83 return OPENSSL_instrument_bus2_mfspr268(out, cnt, max);
84 else
85 return 0;
86 }
87
88 #if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
89 # if __GLIBC_PREREQ(2, 16)
90 # include <sys/auxv.h>
91 # define OSSL_IMPLEMENT_GETAUXVAL
92 # elif defined(__ANDROID_API__)
93 /* see https://developer.android.google.cn/ndk/guides/cpu-features */
94 # if __ANDROID_API__ >= 18
95 # include <sys/auxv.h>
96 # define OSSL_IMPLEMENT_GETAUXVAL
97 # endif
98 # endif
99 #endif
100
101 #if defined(__FreeBSD__)
102 # include <sys/param.h>
103 # if __FreeBSD_version >= 1200000
104 # include <sys/auxv.h>
105 # define OSSL_IMPLEMENT_GETAUXVAL
106
getauxval(unsigned long key)107 static unsigned long getauxval(unsigned long key)
108 {
109 unsigned long val = 0ul;
110
111 if (elf_aux_info((int)key, &val, sizeof(val)) != 0)
112 return 0ul;
113
114 return val;
115 }
116 # endif
117 #endif
118
119 /* I wish <sys/auxv.h> was universally available */
120 #ifndef AT_HWCAP
121 # define AT_HWCAP 16 /* AT_HWCAP */
122 #endif
123 #define HWCAP_PPC64 (1U << 30)
124 #define HWCAP_ALTIVEC (1U << 28)
125 #define HWCAP_FPU (1U << 27)
126 #define HWCAP_POWER6_EXT (1U << 9)
127 #define HWCAP_VSX (1U << 7)
128
129 #ifndef AT_HWCAP2
130 # define AT_HWCAP2 26 /* AT_HWCAP2 */
131 #endif
132 #define HWCAP_VEC_CRYPTO (1U << 25)
133 #define HWCAP_ARCH_3_00 (1U << 23)
134
135 # if defined(__GNUC__) && __GNUC__>=2
136 __attribute__ ((constructor))
137 # endif
OPENSSL_cpuid_setup(void)138 void OPENSSL_cpuid_setup(void)
139 {
140 char *e;
141 struct sigaction ill_oact, ill_act;
142 sigset_t oset;
143 static int trigger = 0;
144
145 if (trigger)
146 return;
147 trigger = 1;
148
149 if ((e = getenv("OPENSSL_ppccap"))) {
150 OPENSSL_ppccap_P = strtoul(e, NULL, 0);
151 return;
152 }
153
154 OPENSSL_ppccap_P = 0;
155
156 #if defined(_AIX)
157 OPENSSL_ppccap_P |= PPC_FPU;
158
159 if (sizeof(size_t) == 4) {
160 struct utsname uts;
161 # if defined(_SC_AIX_KERNEL_BITMODE)
162 if (sysconf(_SC_AIX_KERNEL_BITMODE) != 64)
163 return;
164 # endif
165 if (uname(&uts) != 0 || atoi(uts.version) < 6)
166 return;
167 }
168
169 # if defined(__power_set)
170 /*
171 * Value used in __power_set is a single-bit 1<<n one denoting
172 * specific processor class. Incidentally 0xffffffff<<n can be
173 * used to denote specific processor and its successors.
174 */
175 if (sizeof(size_t) == 4) {
176 /* In 32-bit case PPC_FPU64 is always fastest [if option] */
177 if (__power_set(0xffffffffU<<13)) /* POWER5 and later */
178 OPENSSL_ppccap_P |= PPC_FPU64;
179 } else {
180 /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */
181 if (__power_set(0x1U<<14)) /* POWER6 */
182 OPENSSL_ppccap_P |= PPC_FPU64;
183 }
184
185 if (__power_set(0xffffffffU<<14)) /* POWER6 and later */
186 OPENSSL_ppccap_P |= PPC_ALTIVEC;
187
188 if (__power_set(0xffffffffU<<16)) /* POWER8 and later */
189 OPENSSL_ppccap_P |= PPC_CRYPTO207;
190
191 if (__power_set(0xffffffffU<<17)) /* POWER9 and later */
192 OPENSSL_ppccap_P |= PPC_MADD300;
193
194 return;
195 # endif
196 #endif
197
198 #if defined(__APPLE__) && defined(__MACH__)
199 OPENSSL_ppccap_P |= PPC_FPU;
200
201 {
202 int val;
203 size_t len = sizeof(val);
204
205 if (sysctlbyname("hw.optional.64bitops", &val, &len, NULL, 0) == 0) {
206 if (val)
207 OPENSSL_ppccap_P |= PPC_FPU64;
208 }
209
210 len = sizeof(val);
211 if (sysctlbyname("hw.optional.altivec", &val, &len, NULL, 0) == 0) {
212 if (val)
213 OPENSSL_ppccap_P |= PPC_ALTIVEC;
214 }
215
216 return;
217 }
218 #endif
219
220 #ifdef OSSL_IMPLEMENT_GETAUXVAL
221 {
222 unsigned long hwcap = getauxval(AT_HWCAP);
223 unsigned long hwcap2 = getauxval(AT_HWCAP2);
224
225 if (hwcap & HWCAP_FPU) {
226 OPENSSL_ppccap_P |= PPC_FPU;
227
228 if (sizeof(size_t) == 4) {
229 /* In 32-bit case PPC_FPU64 is always fastest [if option] */
230 if (hwcap & HWCAP_PPC64)
231 OPENSSL_ppccap_P |= PPC_FPU64;
232 } else {
233 /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */
234 if (hwcap & HWCAP_POWER6_EXT)
235 OPENSSL_ppccap_P |= PPC_FPU64;
236 }
237 }
238
239 if (hwcap & HWCAP_ALTIVEC) {
240 OPENSSL_ppccap_P |= PPC_ALTIVEC;
241
242 if ((hwcap & HWCAP_VSX) && (hwcap2 & HWCAP_VEC_CRYPTO))
243 OPENSSL_ppccap_P |= PPC_CRYPTO207;
244 }
245
246 if (hwcap2 & HWCAP_ARCH_3_00) {
247 OPENSSL_ppccap_P |= PPC_MADD300;
248 }
249 }
250 #endif
251
252 sigfillset(&all_masked);
253 sigdelset(&all_masked, SIGILL);
254 sigdelset(&all_masked, SIGTRAP);
255 #ifdef SIGEMT
256 sigdelset(&all_masked, SIGEMT);
257 #endif
258 sigdelset(&all_masked, SIGFPE);
259 sigdelset(&all_masked, SIGBUS);
260 sigdelset(&all_masked, SIGSEGV);
261
262 memset(&ill_act, 0, sizeof(ill_act));
263 ill_act.sa_handler = ill_handler;
264 ill_act.sa_mask = all_masked;
265
266 sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset);
267 sigaction(SIGILL, &ill_act, &ill_oact);
268
269 #ifndef OSSL_IMPLEMENT_GETAUXVAL
270 if (sigsetjmp(ill_jmp,1) == 0) {
271 OPENSSL_fpu_probe();
272 OPENSSL_ppccap_P |= PPC_FPU;
273
274 if (sizeof(size_t) == 4) {
275 # ifdef __linux
276 struct utsname uts;
277 if (uname(&uts) == 0 && strcmp(uts.machine, "ppc64") == 0)
278 # endif
279 if (sigsetjmp(ill_jmp, 1) == 0) {
280 OPENSSL_ppc64_probe();
281 OPENSSL_ppccap_P |= PPC_FPU64;
282 }
283 } else {
284 /*
285 * Wanted code detecting POWER6 CPU and setting PPC_FPU64
286 */
287 }
288 }
289
290 if (sigsetjmp(ill_jmp, 1) == 0) {
291 OPENSSL_altivec_probe();
292 OPENSSL_ppccap_P |= PPC_ALTIVEC;
293 if (sigsetjmp(ill_jmp, 1) == 0) {
294 OPENSSL_crypto207_probe();
295 OPENSSL_ppccap_P |= PPC_CRYPTO207;
296 }
297 }
298
299 if (sigsetjmp(ill_jmp, 1) == 0) {
300 OPENSSL_madd300_probe();
301 OPENSSL_ppccap_P |= PPC_MADD300;
302 }
303 #endif
304
305 if (sigsetjmp(ill_jmp, 1) == 0) {
306 OPENSSL_rdtsc_mftb();
307 OPENSSL_ppccap_P |= PPC_MFTB;
308 } else if (sigsetjmp(ill_jmp, 1) == 0) {
309 OPENSSL_rdtsc_mfspr268();
310 OPENSSL_ppccap_P |= PPC_MFSPR268;
311 }
312
313 sigaction(SIGILL, &ill_oact, NULL);
314 sigprocmask(SIG_SETMASK, &oset, NULL);
315 }
316