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b1322259 | 1 | /* |
fecb3aae | 2 | * Copyright 2009-2022 The OpenSSL Project Authors. All Rights Reserved. |
b1322259 | 3 | * |
0e9725bc | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
b1322259 RS |
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 | ||
b4b48a10 AP |
10 | #include <stdio.h> |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <setjmp.h> | |
14 | #include <signal.h> | |
fd054957 | 15 | #include <unistd.h> |
d5630dd6 | 16 | #if defined(__linux) || defined(_AIX) |
0f113f3e | 17 | # include <sys/utsname.h> |
78c3e205 | 18 | #endif |
2688d999 AP |
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 | |
0bd93bbe AP |
25 | #if defined(__APPLE__) && defined(__MACH__) |
26 | # include <sys/types.h> | |
27 | # include <sys/sysctl.h> | |
28 | #endif | |
11252459 | 29 | #include <openssl/crypto.h> |
449bdf37 | 30 | #include "internal/cryptlib.h" |
3d178db7 | 31 | #include "crypto/ppc_arch.h" |
b4b48a10 | 32 | |
07f3e4f3 | 33 | unsigned int OPENSSL_ppccap_P = 0; |
b4b48a10 AP |
34 | |
35 | static sigset_t all_masked; | |
36 | ||
b4b48a10 | 37 | static sigjmp_buf ill_jmp; |
0f113f3e MC |
38 | static void ill_handler(int sig) |
39 | { | |
40 | siglongjmp(ill_jmp, sig); | |
41 | } | |
b4b48a10 | 42 | |
2688d999 | 43 | void OPENSSL_fpu_probe(void); |
70b76d39 | 44 | void OPENSSL_ppc64_probe(void); |
fd054957 | 45 | void OPENSSL_altivec_probe(void); |
de51e830 | 46 | void OPENSSL_crypto207_probe(void); |
53385e1f | 47 | void OPENSSL_madd300_probe(void); |
f596bbe4 | 48 | void OPENSSL_brd31_probe(void); |
70b76d39 | 49 | |
c8f37048 BE |
50 | long OPENSSL_rdtsc_mftb(void); |
51 | long OPENSSL_rdtsc_mfspr268(void); | |
52 | ||
53 | uint32_t OPENSSL_rdtsc(void) | |
54 | { | |
55 | if (OPENSSL_ppccap_P & PPC_MFTB) | |
56 | return OPENSSL_rdtsc_mftb(); | |
57 | else if (OPENSSL_ppccap_P & PPC_MFSPR268) | |
58 | return OPENSSL_rdtsc_mfspr268(); | |
59 | else | |
60 | return 0; | |
61 | } | |
62 | ||
63 | size_t OPENSSL_instrument_bus_mftb(unsigned int *, size_t); | |
64 | size_t OPENSSL_instrument_bus_mfspr268(unsigned int *, size_t); | |
65 | ||
66 | size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt) | |
67 | { | |
68 | if (OPENSSL_ppccap_P & PPC_MFTB) | |
69 | return OPENSSL_instrument_bus_mftb(out, cnt); | |
70 | else if (OPENSSL_ppccap_P & PPC_MFSPR268) | |
71 | return OPENSSL_instrument_bus_mfspr268(out, cnt); | |
72 | else | |
73 | return 0; | |
74 | } | |
75 | ||
76 | size_t OPENSSL_instrument_bus2_mftb(unsigned int *, size_t, size_t); | |
77 | size_t OPENSSL_instrument_bus2_mfspr268(unsigned int *, size_t, size_t); | |
78 | ||
79 | size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max) | |
80 | { | |
81 | if (OPENSSL_ppccap_P & PPC_MFTB) | |
82 | return OPENSSL_instrument_bus2_mftb(out, cnt, max); | |
83 | else if (OPENSSL_ppccap_P & PPC_MFSPR268) | |
84 | return OPENSSL_instrument_bus2_mfspr268(out, cnt, max); | |
85 | else | |
86 | return 0; | |
87 | } | |
88 | ||
5f40dd15 RL |
89 | #if defined(__GLIBC__) && defined(__GLIBC_PREREQ) |
90 | # if __GLIBC_PREREQ(2, 16) | |
91 | # include <sys/auxv.h> | |
92 | # define OSSL_IMPLEMENT_GETAUXVAL | |
d5567d5f | 93 | # elif defined(__ANDROID_API__) |
94 | /* see https://developer.android.google.cn/ndk/guides/cpu-features */ | |
95 | # if __ANDROID_API__ >= 18 | |
96 | # include <sys/auxv.h> | |
97 | # define OSSL_IMPLEMENT_GETAUXVAL | |
98 | # endif | |
5f40dd15 | 99 | # endif |
2688d999 AP |
100 | #endif |
101 | ||
b57ec739 DC |
102 | #if defined(__FreeBSD__) |
103 | # include <sys/param.h> | |
104 | # if __FreeBSD_version >= 1200000 | |
105 | # include <sys/auxv.h> | |
106 | # define OSSL_IMPLEMENT_GETAUXVAL | |
107 | ||
108 | static unsigned long getauxval(unsigned long key) | |
109 | { | |
110 | unsigned long val = 0ul; | |
111 | ||
112 | if (elf_aux_info((int)key, &val, sizeof(val)) != 0) | |
113 | return 0ul; | |
114 | ||
115 | return val; | |
116 | } | |
117 | # endif | |
118 | #endif | |
119 | ||
2688d999 | 120 | /* I wish <sys/auxv.h> was universally available */ |
f5485b97 | 121 | #ifndef AT_HWCAP |
122 | # define AT_HWCAP 16 /* AT_HWCAP */ | |
123 | #endif | |
2688d999 AP |
124 | #define HWCAP_PPC64 (1U << 30) |
125 | #define HWCAP_ALTIVEC (1U << 28) | |
126 | #define HWCAP_FPU (1U << 27) | |
127 | #define HWCAP_POWER6_EXT (1U << 9) | |
128 | #define HWCAP_VSX (1U << 7) | |
129 | ||
f5485b97 | 130 | #ifndef AT_HWCAP2 |
131 | # define AT_HWCAP2 26 /* AT_HWCAP2 */ | |
132 | #endif | |
2688d999 | 133 | #define HWCAP_VEC_CRYPTO (1U << 25) |
e0e53282 | 134 | #define HWCAP_ARCH_3_00 (1U << 23) |
f596bbe4 | 135 | #define HWCAP_ARCH_3_1 (1U << 18) |
2688d999 AP |
136 | |
137 | # if defined(__GNUC__) && __GNUC__>=2 | |
138 | __attribute__ ((constructor)) | |
139 | # endif | |
b4b48a10 | 140 | void OPENSSL_cpuid_setup(void) |
0f113f3e MC |
141 | { |
142 | char *e; | |
143 | struct sigaction ill_oact, ill_act; | |
144 | sigset_t oset; | |
145 | static int trigger = 0; | |
146 | ||
147 | if (trigger) | |
148 | return; | |
149 | trigger = 1; | |
150 | ||
0f113f3e MC |
151 | if ((e = getenv("OPENSSL_ppccap"))) { |
152 | OPENSSL_ppccap_P = strtoul(e, NULL, 0); | |
153 | return; | |
154 | } | |
b4b48a10 | 155 | |
0f113f3e | 156 | OPENSSL_ppccap_P = 0; |
6415dd7b | 157 | |
fd054957 | 158 | #if defined(_AIX) |
2688d999 AP |
159 | OPENSSL_ppccap_P |= PPC_FPU; |
160 | ||
0f113f3e MC |
161 | if (sizeof(size_t) == 4) { |
162 | struct utsname uts; | |
fd054957 | 163 | # if defined(_SC_AIX_KERNEL_BITMODE) |
0f113f3e MC |
164 | if (sysconf(_SC_AIX_KERNEL_BITMODE) != 64) |
165 | return; | |
fd054957 | 166 | # endif |
0f113f3e MC |
167 | if (uname(&uts) != 0 || atoi(uts.version) < 6) |
168 | return; | |
169 | } | |
2688d999 AP |
170 | |
171 | # if defined(__power_set) | |
172 | /* | |
173 | * Value used in __power_set is a single-bit 1<<n one denoting | |
174 | * specific processor class. Incidentally 0xffffffff<<n can be | |
175 | * used to denote specific processor and its successors. | |
176 | */ | |
177 | if (sizeof(size_t) == 4) { | |
178 | /* In 32-bit case PPC_FPU64 is always fastest [if option] */ | |
179 | if (__power_set(0xffffffffU<<13)) /* POWER5 and later */ | |
180 | OPENSSL_ppccap_P |= PPC_FPU64; | |
181 | } else { | |
182 | /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */ | |
183 | if (__power_set(0x1U<<14)) /* POWER6 */ | |
184 | OPENSSL_ppccap_P |= PPC_FPU64; | |
185 | } | |
186 | ||
187 | if (__power_set(0xffffffffU<<14)) /* POWER6 and later */ | |
188 | OPENSSL_ppccap_P |= PPC_ALTIVEC; | |
189 | ||
190 | if (__power_set(0xffffffffU<<16)) /* POWER8 and later */ | |
191 | OPENSSL_ppccap_P |= PPC_CRYPTO207; | |
192 | ||
e0e53282 AP |
193 | if (__power_set(0xffffffffU<<17)) /* POWER9 and later */ |
194 | OPENSSL_ppccap_P |= PPC_MADD300; | |
195 | ||
f596bbe4 DB |
196 | if (__power_set(0xffffffffU<<18)) /* POWER10 and later */ |
197 | OPENSSL_ppccap_P |= PPC_BRD31; | |
198 | ||
2688d999 AP |
199 | return; |
200 | # endif | |
201 | #endif | |
202 | ||
0bd93bbe AP |
203 | #if defined(__APPLE__) && defined(__MACH__) |
204 | OPENSSL_ppccap_P |= PPC_FPU; | |
205 | ||
206 | { | |
207 | int val; | |
208 | size_t len = sizeof(val); | |
209 | ||
210 | if (sysctlbyname("hw.optional.64bitops", &val, &len, NULL, 0) == 0) { | |
211 | if (val) | |
212 | OPENSSL_ppccap_P |= PPC_FPU64; | |
213 | } | |
214 | ||
215 | len = sizeof(val); | |
216 | if (sysctlbyname("hw.optional.altivec", &val, &len, NULL, 0) == 0) { | |
217 | if (val) | |
218 | OPENSSL_ppccap_P |= PPC_ALTIVEC; | |
219 | } | |
220 | ||
221 | return; | |
222 | } | |
223 | #endif | |
224 | ||
5f40dd15 RL |
225 | #ifdef OSSL_IMPLEMENT_GETAUXVAL |
226 | { | |
f5485b97 | 227 | unsigned long hwcap = getauxval(AT_HWCAP); |
228 | unsigned long hwcap2 = getauxval(AT_HWCAP2); | |
2688d999 AP |
229 | |
230 | if (hwcap & HWCAP_FPU) { | |
dccd20d1 | 231 | OPENSSL_ppccap_P |= PPC_FPU; |
2688d999 AP |
232 | |
233 | if (sizeof(size_t) == 4) { | |
234 | /* In 32-bit case PPC_FPU64 is always fastest [if option] */ | |
235 | if (hwcap & HWCAP_PPC64) | |
236 | OPENSSL_ppccap_P |= PPC_FPU64; | |
237 | } else { | |
238 | /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */ | |
239 | if (hwcap & HWCAP_POWER6_EXT) | |
240 | OPENSSL_ppccap_P |= PPC_FPU64; | |
241 | } | |
242 | } | |
243 | ||
244 | if (hwcap & HWCAP_ALTIVEC) { | |
245 | OPENSSL_ppccap_P |= PPC_ALTIVEC; | |
246 | ||
99592c73 | 247 | if ((hwcap & HWCAP_VSX) && (hwcap2 & HWCAP_VEC_CRYPTO)) |
2688d999 AP |
248 | OPENSSL_ppccap_P |= PPC_CRYPTO207; |
249 | } | |
250 | ||
99592c73 | 251 | if (hwcap2 & HWCAP_ARCH_3_00) { |
e0e53282 AP |
252 | OPENSSL_ppccap_P |= PPC_MADD300; |
253 | } | |
f596bbe4 DB |
254 | |
255 | if (hwcap2 & HWCAP_ARCH_3_1) { | |
256 | OPENSSL_ppccap_P |= PPC_BRD31; | |
257 | } | |
2688d999 | 258 | } |
5f40dd15 | 259 | #endif |
2688d999 AP |
260 | |
261 | sigfillset(&all_masked); | |
262 | sigdelset(&all_masked, SIGILL); | |
263 | sigdelset(&all_masked, SIGTRAP); | |
264 | #ifdef SIGEMT | |
265 | sigdelset(&all_masked, SIGEMT); | |
fd054957 | 266 | #endif |
2688d999 AP |
267 | sigdelset(&all_masked, SIGFPE); |
268 | sigdelset(&all_masked, SIGBUS); | |
269 | sigdelset(&all_masked, SIGSEGV); | |
fd054957 | 270 | |
0f113f3e MC |
271 | memset(&ill_act, 0, sizeof(ill_act)); |
272 | ill_act.sa_handler = ill_handler; | |
273 | ill_act.sa_mask = all_masked; | |
6415dd7b | 274 | |
0f113f3e MC |
275 | sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset); |
276 | sigaction(SIGILL, &ill_act, &ill_oact); | |
6415dd7b | 277 | |
c8f37048 | 278 | #ifndef OSSL_IMPLEMENT_GETAUXVAL |
1287dabd | 279 | if (sigsetjmp(ill_jmp, 1) == 0) { |
2688d999 AP |
280 | OPENSSL_fpu_probe(); |
281 | OPENSSL_ppccap_P |= PPC_FPU; | |
282 | ||
283 | if (sizeof(size_t) == 4) { | |
c8f37048 | 284 | # ifdef __linux |
2688d999 AP |
285 | struct utsname uts; |
286 | if (uname(&uts) == 0 && strcmp(uts.machine, "ppc64") == 0) | |
c8f37048 | 287 | # endif |
2688d999 AP |
288 | if (sigsetjmp(ill_jmp, 1) == 0) { |
289 | OPENSSL_ppc64_probe(); | |
290 | OPENSSL_ppccap_P |= PPC_FPU64; | |
291 | } | |
292 | } else { | |
293 | /* | |
294 | * Wanted code detecting POWER6 CPU and setting PPC_FPU64 | |
295 | */ | |
296 | } | |
0f113f3e MC |
297 | } |
298 | ||
299 | if (sigsetjmp(ill_jmp, 1) == 0) { | |
300 | OPENSSL_altivec_probe(); | |
301 | OPENSSL_ppccap_P |= PPC_ALTIVEC; | |
302 | if (sigsetjmp(ill_jmp, 1) == 0) { | |
303 | OPENSSL_crypto207_probe(); | |
304 | OPENSSL_ppccap_P |= PPC_CRYPTO207; | |
305 | } | |
306 | } | |
307 | ||
e0e53282 AP |
308 | if (sigsetjmp(ill_jmp, 1) == 0) { |
309 | OPENSSL_madd300_probe(); | |
310 | OPENSSL_ppccap_P |= PPC_MADD300; | |
311 | } | |
c8f37048 BE |
312 | #endif |
313 | ||
314 | if (sigsetjmp(ill_jmp, 1) == 0) { | |
315 | OPENSSL_rdtsc_mftb(); | |
316 | OPENSSL_ppccap_P |= PPC_MFTB; | |
317 | } else if (sigsetjmp(ill_jmp, 1) == 0) { | |
318 | OPENSSL_rdtsc_mfspr268(); | |
319 | OPENSSL_ppccap_P |= PPC_MFSPR268; | |
320 | } | |
e0e53282 | 321 | |
0f113f3e MC |
322 | sigaction(SIGILL, &ill_oact, NULL); |
323 | sigprocmask(SIG_SETMASK, &oset, NULL); | |
324 | } |