1 /*
2 * Copyright 2009-2024 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 void OPENSSL_brd31_probe(void);
49
50 long OPENSSL_rdtsc_mftb(void);
51 long OPENSSL_rdtsc_mfspr268(void);
52
OPENSSL_rdtsc(void)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
OPENSSL_instrument_bus(unsigned int * out,size_t cnt)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
OPENSSL_instrument_bus2(unsigned int * out,size_t cnt,size_t max)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
89 #if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
90 # if __GLIBC_PREREQ(2, 16)
91 # include <sys/auxv.h>
92 # define OSSL_IMPLEMENT_GETAUXVAL
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
99 # endif
100 #endif
101
102 #if defined(__FreeBSD__) || defined(__OpenBSD__)
103 # include <sys/param.h>
104 # if (defined(__FreeBSD__) && __FreeBSD_version >= 1200000) || \
105 (defined(__OpenBSD__) && OpenBSD >= 202409)
106 # include <sys/auxv.h>
107 # define OSSL_IMPLEMENT_GETAUXVAL
108
getauxval(unsigned long key)109 static unsigned long getauxval(unsigned long key)
110 {
111 unsigned long val = 0ul;
112
113 if (elf_aux_info((int)key, &val, sizeof(val)) != 0)
114 return 0ul;
115
116 return val;
117 }
118 # endif
119 #endif
120
121 /* I wish <sys/auxv.h> was universally available */
122 #ifndef AT_HWCAP
123 # define AT_HWCAP 16 /* AT_HWCAP */
124 #endif
125 #define HWCAP_PPC64 (1U << 30)
126 #define HWCAP_ALTIVEC (1U << 28)
127 #define HWCAP_FPU (1U << 27)
128 #define HWCAP_POWER6_EXT (1U << 9)
129 #define HWCAP_VSX (1U << 7)
130
131 #ifndef AT_HWCAP2
132 # define AT_HWCAP2 26 /* AT_HWCAP2 */
133 #endif
134 #define HWCAP_VEC_CRYPTO (1U << 25)
135 #define HWCAP_ARCH_3_00 (1U << 23)
136 #define HWCAP_ARCH_3_1 (1U << 18)
137
138 # if defined(__GNUC__) && __GNUC__>=2
139 __attribute__ ((constructor))
140 # endif
OPENSSL_cpuid_setup(void)141 void OPENSSL_cpuid_setup(void)
142 {
143 char *e;
144 struct sigaction ill_oact, ill_act;
145 sigset_t oset;
146 static int trigger = 0;
147
148 if (trigger)
149 return;
150 trigger = 1;
151
152 if ((e = getenv("OPENSSL_ppccap"))) {
153 OPENSSL_ppccap_P = strtoul(e, NULL, 0);
154 return;
155 }
156
157 OPENSSL_ppccap_P = 0;
158
159 #if defined(_AIX)
160 OPENSSL_ppccap_P |= PPC_FPU;
161
162 if (sizeof(size_t) == 4) {
163 struct utsname uts;
164 # if defined(_SC_AIX_KERNEL_BITMODE)
165 if (sysconf(_SC_AIX_KERNEL_BITMODE) != 64)
166 return;
167 # endif
168 if (uname(&uts) != 0 || atoi(uts.version) < 6)
169 return;
170 }
171
172 # if defined(__power_set)
173 /*
174 * Value used in __power_set is a single-bit 1<<n one denoting
175 * specific processor class. Incidentally 0xffffffff<<n can be
176 * used to denote specific processor and its successors.
177 */
178 if (sizeof(size_t) == 4) {
179 /* In 32-bit case PPC_FPU64 is always fastest [if option] */
180 if (__power_set(0xffffffffU<<13)) /* POWER5 and later */
181 OPENSSL_ppccap_P |= PPC_FPU64;
182 } else {
183 /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */
184 if (__power_set(0x1U<<14)) /* POWER6 */
185 OPENSSL_ppccap_P |= PPC_FPU64;
186 }
187
188 if (__power_set(0xffffffffU<<14)) /* POWER6 and later */
189 OPENSSL_ppccap_P |= PPC_ALTIVEC;
190
191 if (__power_set(0xffffffffU<<16)) /* POWER8 and later */
192 OPENSSL_ppccap_P |= PPC_CRYPTO207;
193
194 if (__power_set(0xffffffffU<<17)) /* POWER9 and later */
195 OPENSSL_ppccap_P |= PPC_MADD300;
196
197 if (__power_set(0xffffffffU<<18)) /* POWER10 and later */
198 OPENSSL_ppccap_P |= PPC_BRD31;
199
200 return;
201 # endif
202 #endif
203
204 #if defined(__APPLE__) && defined(__MACH__)
205 OPENSSL_ppccap_P |= PPC_FPU;
206
207 {
208 int val;
209 size_t len = sizeof(val);
210
211 if (sysctlbyname("hw.optional.64bitops", &val, &len, NULL, 0) == 0) {
212 if (val)
213 OPENSSL_ppccap_P |= PPC_FPU64;
214 }
215
216 len = sizeof(val);
217 if (sysctlbyname("hw.optional.altivec", &val, &len, NULL, 0) == 0) {
218 if (val)
219 OPENSSL_ppccap_P |= PPC_ALTIVEC;
220 }
221
222 return;
223 }
224 #endif
225
226 #ifdef OSSL_IMPLEMENT_GETAUXVAL
227 {
228 unsigned long hwcap = getauxval(AT_HWCAP);
229 unsigned long hwcap2 = getauxval(AT_HWCAP2);
230
231 if (hwcap & HWCAP_FPU) {
232 OPENSSL_ppccap_P |= PPC_FPU;
233
234 if (sizeof(size_t) == 4) {
235 /* In 32-bit case PPC_FPU64 is always fastest [if option] */
236 if (hwcap & HWCAP_PPC64)
237 OPENSSL_ppccap_P |= PPC_FPU64;
238 } else {
239 /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */
240 if (hwcap & HWCAP_POWER6_EXT)
241 OPENSSL_ppccap_P |= PPC_FPU64;
242 }
243 }
244
245 if (hwcap & HWCAP_ALTIVEC) {
246 OPENSSL_ppccap_P |= PPC_ALTIVEC;
247
248 if ((hwcap & HWCAP_VSX) && (hwcap2 & HWCAP_VEC_CRYPTO))
249 OPENSSL_ppccap_P |= PPC_CRYPTO207;
250 }
251
252 if (hwcap2 & HWCAP_ARCH_3_00) {
253 OPENSSL_ppccap_P |= PPC_MADD300;
254 }
255
256 if (hwcap2 & HWCAP_ARCH_3_1) {
257 OPENSSL_ppccap_P |= PPC_BRD31;
258 }
259 }
260 #endif
261
262 sigfillset(&all_masked);
263 sigdelset(&all_masked, SIGILL);
264 sigdelset(&all_masked, SIGTRAP);
265 #ifdef SIGEMT
266 sigdelset(&all_masked, SIGEMT);
267 #endif
268 sigdelset(&all_masked, SIGFPE);
269 sigdelset(&all_masked, SIGBUS);
270 sigdelset(&all_masked, SIGSEGV);
271
272 memset(&ill_act, 0, sizeof(ill_act));
273 ill_act.sa_handler = ill_handler;
274 ill_act.sa_mask = all_masked;
275
276 sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset);
277 sigaction(SIGILL, &ill_act, &ill_oact);
278
279 #ifndef OSSL_IMPLEMENT_GETAUXVAL
280 if (sigsetjmp(ill_jmp, 1) == 0) {
281 OPENSSL_fpu_probe();
282 OPENSSL_ppccap_P |= PPC_FPU;
283
284 if (sizeof(size_t) == 4) {
285 # ifdef __linux
286 struct utsname uts;
287 if (uname(&uts) == 0 && strcmp(uts.machine, "ppc64") == 0)
288 # endif
289 if (sigsetjmp(ill_jmp, 1) == 0) {
290 OPENSSL_ppc64_probe();
291 OPENSSL_ppccap_P |= PPC_FPU64;
292 }
293 } else {
294 /*
295 * Wanted code detecting POWER6 CPU and setting PPC_FPU64
296 */
297 }
298 }
299
300 if (sigsetjmp(ill_jmp, 1) == 0) {
301 OPENSSL_altivec_probe();
302 OPENSSL_ppccap_P |= PPC_ALTIVEC;
303 if (sigsetjmp(ill_jmp, 1) == 0) {
304 OPENSSL_crypto207_probe();
305 OPENSSL_ppccap_P |= PPC_CRYPTO207;
306 }
307 }
308
309 if (sigsetjmp(ill_jmp, 1) == 0) {
310 OPENSSL_madd300_probe();
311 OPENSSL_ppccap_P |= PPC_MADD300;
312 }
313 #endif
314
315 if (sigsetjmp(ill_jmp, 1) == 0) {
316 OPENSSL_rdtsc_mftb();
317 OPENSSL_ppccap_P |= PPC_MFTB;
318 } else if (sigsetjmp(ill_jmp, 1) == 0) {
319 OPENSSL_rdtsc_mfspr268();
320 OPENSSL_ppccap_P |= PPC_MFSPR268;
321 }
322
323 sigaction(SIGILL, &ill_oact, NULL);
324 sigprocmask(SIG_SETMASK, &oset, NULL);
325 }
326
