/
cpu.cpp
1473 lines (1317 loc) · 44.7 KB
/
cpu.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// cpu.cpp - originally written and placed in the public domain by Wei Dai
// modified by Jeffrey Walton and the community over the years.
#include "pch.h"
#include "config.h"
#ifndef EXCEPTION_EXECUTE_HANDLER
# define EXCEPTION_EXECUTE_HANDLER 1
#endif
#ifndef CRYPTOPP_IMPORTS
#include "cpu.h"
#include "misc.h"
#include "stdcpp.h"
// For _xgetbv on Microsoft 32-bit and 64-bit Intel platforms
// https://github.com/weidai11/cryptopp/issues/972
#if (CRYPTOPP_MSC_VERSION >= 1600) && (defined(_M_IX86) || defined(_M_X64))
# include <immintrin.h>
#endif
// For IsProcessorFeaturePresent on Microsoft Arm64 platforms,
// https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-isprocessorfeaturepresent
#if defined(_WIN32) && defined(_M_ARM64)
# include <Windows.h>
# include <processthreadsapi.h>
#endif
#ifdef _AIX
# include <sys/systemcfg.h>
#endif
#ifdef __linux__
# include <unistd.h>
#endif
// Capability queries, requires Glibc 2.16, http://lwn.net/Articles/519085/
// CRYPTOPP_GLIBC_VERSION not used because config.h is missing <feature.h>
#if (((__GLIBC__ * 100) + __GLIBC_MINOR__) >= 216)
# define CRYPTOPP_GETAUXV_AVAILABLE 1
#endif
#if CRYPTOPP_GETAUXV_AVAILABLE
# include <sys/auxv.h>
#else
#ifndef AT_HWCAP
# define AT_HWCAP 16
#endif
#ifndef AT_HWCAP2
# define AT_HWCAP2 26
#endif
unsigned long int getauxval(unsigned long int) { return 0; }
#endif
#if defined(__APPLE__)
# include <sys/utsname.h>
# include <sys/sysctl.h>
#endif
// FreeBSD headers are giving us trouble...
// https://github.com/weidai11/cryptopp/pull/1029
#if defined(__FreeBSD__)
# include <sys/auxv.h>
# include <sys/elf_common.h>
#endif
// The cpu-features header and source file are located in
// "$ANDROID_NDK_ROOT/sources/android/cpufeatures".
// setenv-android.sh will copy the header and source file
// into PWD and the makefile will build it in place.
#if defined(__ANDROID__)
# include "cpu-features.h"
#endif
#ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
# include <signal.h>
# include <setjmp.h>
#endif
// Required by Visual Studio 2008 and below and Clang on Windows.
// Use it for all MSVC-compatible compilers.
// XGETBV64 and CPUID64 are in x64dll.asm.
#if defined(_M_X64) && defined(CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY)
extern "C" unsigned long long __fastcall XGETBV64(unsigned int);
extern "C" unsigned long long __fastcall CPUID64(unsigned int, unsigned int, unsigned int*);
#endif
#ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
extern "C" {
typedef void (*SigHandler)(int);
}
extern "C"
{
static jmp_buf s_jmpNoCPUID;
static void SigIllHandler(int)
{
longjmp(s_jmpNoCPUID, 1);
}
}
#endif // CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
ANONYMOUS_NAMESPACE_BEGIN
#if (CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64)
using CryptoPP::word32;
inline bool IsIntel(const word32 output[4])
{
// This is the "GenuineIntel" string
return (output[1] /*EBX*/ == 0x756e6547) &&
(output[2] /*ECX*/ == 0x6c65746e) &&
(output[3] /*EDX*/ == 0x49656e69);
}
inline bool IsAMD(const word32 output[4])
{
// This is the "AuthenticAMD" string.
return ((output[1] /*EBX*/ == 0x68747541) &&
(output[2] /*ECX*/ == 0x444D4163) &&
(output[3] /*EDX*/ == 0x69746E65)) ||
// Early K5's can return "AMDisbetter!"
((output[1] /*EBX*/ == 0x69444d41) &&
(output[2] /*ECX*/ == 0x74656273) &&
(output[3] /*EDX*/ == 0x21726574));
}
inline bool IsHygon(const word32 output[4])
{
// This is the "HygonGenuine" string.
return (output[1] /*EBX*/ == 0x6f677948) &&
(output[2] /*ECX*/ == 0x656e6975) &&
(output[3] /*EDX*/ == 0x6e65476e);
}
inline bool IsVIA(const word32 output[4])
{
// This is the "CentaurHauls" string.
return ((output[1] /*EBX*/ == 0x746e6543) &&
(output[2] /*ECX*/ == 0x736c7561) &&
(output[3] /*EDX*/ == 0x48727561)) ||
// Some non-PadLock's return "VIA VIA VIA "
((output[1] /*EBX*/ == 0x32414956) &&
(output[2] /*ECX*/ == 0x32414956) &&
(output[3] /*EDX*/ == 0x32414956));
}
#endif // X86, X32 and X64
#if defined(__APPLE__)
// http://stackoverflow.com/questions/45637888/how-to-determine-armv8-features-at-runtime-on-ios
class AppleMachineInfo
{
public:
enum { PowerMac=1, Mac, iPhone, iPod, iPad, AppleTV, AppleWatch };
enum { PowerPC=1, I386, I686, X86_64, ARM32, ARMV8, ARMV82, ARMV83 };
AppleMachineInfo() : m_device(0), m_version(0), m_arch(0)
{
struct utsname systemInfo;
systemInfo.machine[0] = '\0';
uname(&systemInfo);
std::string machine(systemInfo.machine);
std::string::size_type pos = machine.find_first_of("0123456789");
if (pos != std::string::npos)
m_version = std::atoi(machine.substr(pos).c_str());
if (machine.find("iPhone") != std::string::npos)
{
m_device = iPhone;
if (m_version >= 6) { m_arch = ARMV8; }
else { m_arch = ARM32; }
}
else if (machine.find("iPod") != std::string::npos)
{
m_device = iPod;
if (m_version >= 6) { m_arch = ARMV8; }
else { m_arch = ARM32; }
}
else if (machine.find("iPad") != std::string::npos)
{
m_device = iPad;
if (m_version >= 5) { m_arch = ARMV8; }
else { m_arch = ARM32; }
}
else if (machine.find("PowerMac") != std::string::npos ||
machine.find("Power Macintosh") != std::string::npos)
{
m_device = PowerMac;
m_arch = PowerPC;
}
else if (machine.find("Mac") != std::string::npos ||
machine.find("Macintosh") != std::string::npos)
{
#if defined(__x86_64) || defined(__amd64)
m_device = Mac;
m_arch = X86_64;
#elif defined(__i386)
m_device = Mac;
m_arch = I386;
#elif defined(__i686)
m_device = Mac;
m_arch = I686;
#else
// Should never get here
m_device = Mac;
m_arch = 0;
#endif
}
else if (machine.find("AppleTV") != std::string::npos)
{
m_device = AppleTV;
if (m_version >= 4) { m_arch = ARMV8; }
else { m_arch = ARM32; }
}
else if (machine.find("AppleWatch") != std::string::npos)
{
m_device = AppleWatch;
if (m_version >= 4) { m_arch = ARMV8; }
else { m_arch = ARM32; }
}
else if (machine.find("arm64") != std::string::npos)
{
// M1 machine?
std::string brand;
size_t size = 32;
// Supply an oversized buffer, and avoid
// an extra call to sysctlbyname.
brand.resize(size);
if (sysctlbyname("machdep.cpu.brand_string", &brand[0], &size, NULL, 0) == 0 && size > 0)
{
if (brand[size-1] == '\0')
size--;
brand.resize(size);
}
if (brand == "Apple M1")
{
m_device = Mac;
m_arch = ARMV82;
}
else
{
// ???
m_device = 0;
m_arch = ARMV8;
}
}
else
{
CRYPTOPP_ASSERT(0);
}
}
unsigned int Device() const {
return m_device;
}
unsigned int Version() const {
return m_version;
}
unsigned int Arch() const {
return m_arch;
}
bool IsARM32() const {
return m_arch == ARM32;
}
bool IsARMv8() const {
return m_arch >= ARMV8;
}
bool IsARMv82() const {
return m_arch >= ARMV82;
}
bool IsARMv83() const {
return m_arch >= ARMV83;
}
private:
unsigned int m_device, m_version, m_arch;
};
void GetAppleMachineInfo(unsigned int& device, unsigned int& version, unsigned int& arch)
{
#if CRYPTOPP_CXX11_STATIC_INIT
static const AppleMachineInfo info;
#else
using CryptoPP::Singleton;
const AppleMachineInfo& info = Singleton<AppleMachineInfo>().Ref();
#endif
device = info.Device();
version = info.Version();
arch = info.Arch();
}
inline bool IsAppleMachineARM32()
{
static unsigned int arch;
if (arch == 0)
{
unsigned int unused;
GetAppleMachineInfo(unused, unused, arch);
}
return arch == AppleMachineInfo::ARM32;
}
inline bool IsAppleMachineARMv8()
{
static unsigned int arch;
if (arch == 0)
{
unsigned int unused;
GetAppleMachineInfo(unused, unused, arch);
}
return arch >= AppleMachineInfo::ARMV8;
}
inline bool IsAppleMachineARMv82()
{
static unsigned int arch;
if (arch == 0)
{
unsigned int unused;
GetAppleMachineInfo(unused, unused, arch);
}
return arch >= AppleMachineInfo::ARMV82;
}
inline bool IsAppleMachineARMv83()
{
static unsigned int arch;
if (arch == 0)
{
unsigned int unused;
GetAppleMachineInfo(unused, unused, arch);
}
return arch >= AppleMachineInfo::ARMV83;
}
#endif // __APPLE__
ANONYMOUS_NAMESPACE_END
NAMESPACE_BEGIN(CryptoPP)
// *************************** IA-32 CPUs ***************************
#if (CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64)
bool CRYPTOPP_SECTION_INIT g_x86DetectionDone = false;
bool CRYPTOPP_SECTION_INIT g_hasSSE2 = false;
bool CRYPTOPP_SECTION_INIT g_hasSSSE3 = false;
bool CRYPTOPP_SECTION_INIT g_hasSSE41 = false;
bool CRYPTOPP_SECTION_INIT g_hasSSE42 = false;
bool CRYPTOPP_SECTION_INIT g_hasAESNI = false;
bool CRYPTOPP_SECTION_INIT g_hasCLMUL = false;
bool CRYPTOPP_SECTION_INIT g_hasMOVBE = false;
bool CRYPTOPP_SECTION_INIT g_hasAVX = false;
bool CRYPTOPP_SECTION_INIT g_hasAVX2 = false;
bool CRYPTOPP_SECTION_INIT g_hasADX = false;
bool CRYPTOPP_SECTION_INIT g_hasSHA = false;
bool CRYPTOPP_SECTION_INIT g_hasRDRAND = false;
bool CRYPTOPP_SECTION_INIT g_hasRDSEED = false;
bool CRYPTOPP_SECTION_INIT g_isP4 = false;
bool CRYPTOPP_SECTION_INIT g_hasPadlockRNG = false;
bool CRYPTOPP_SECTION_INIT g_hasPadlockACE = false;
bool CRYPTOPP_SECTION_INIT g_hasPadlockACE2 = false;
bool CRYPTOPP_SECTION_INIT g_hasPadlockPHE = false;
bool CRYPTOPP_SECTION_INIT g_hasPadlockPMM = false;
word32 CRYPTOPP_SECTION_INIT g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
// For Solaris 11
extern bool CPU_ProbeSSE2();
// xcr0 is available when xgetbv is present.
// The intrinsic is broke on GCC 8.1 and earlier. Also see
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85684.
word64 XGetBV(word32 num)
{
// Explicitly handle CRYPTOPP_DISABLE_ASM case.
// https://github.com/weidai11/cryptopp/issues/1240
#if defined(CRYPTOPP_DISABLE_ASM)
return 0;
// Required by Visual Studio 2008 and below and Clang on Windows.
// Use it for all MSVC-compatible compilers.
#elif defined(_M_X64) && defined(CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY)
return XGETBV64(num);
// Required by Visual Studio 2008 and below and Clang on Windows.
// Use it for all MSVC-compatible compilers.
#elif defined(_M_IX86) && defined(CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY)
word32 a=0, d=0;
__asm {
push eax
push edx
push ecx
mov ecx, num
_emit 0x0f
_emit 0x01
_emit 0xd0
mov a, eax
mov d, edx
pop ecx
pop edx
pop eax
}
return (static_cast<word64>(d) << 32) | a;
// GCC 4.4 and above
#elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
word32 a=0, d=0;
__asm__
(
"xgetbv" : "=a"(a), "=d"(d) : "c"(num) : "cc"
);
return (static_cast<word64>(d) << 32) | a;
// Remainder of GCC and compatibles.
#elif defined(__GNUC__) || defined(__clang__) || defined(__SUNPRO_CC)
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71659 and
// http://www.agner.org/optimize/vectorclass/read.php?i=65
word32 a=0, d=0;
__asm__
(
".byte 0x0f, 0x01, 0xd0" "\n\t"
: "=a"(a), "=d"(d) : "c"(num) : "cc"
);
return (static_cast<word64>(d) << 32) | a;
#else
# error "Need an xgetbv function"
#endif
}
// No inline due to Borland/Embarcadero and Issue 498
// cpu.cpp (131): E2211 Inline assembly not allowed in inline and template functions
bool CpuId(word32 func, word32 subfunc, word32 output[4])
{
// Explicitly handle CRYPTOPP_DISABLE_ASM case.
// https://github.com/weidai11/cryptopp/issues/1240
#if defined(CRYPTOPP_DISABLE_ASM)
output[0] = output[1] = output[2] = output[3] = 0;
return false;
// Required by Visual Studio 2008 and below and Clang on Windows.
// Use it for all MSVC-compatible compilers.
#elif defined(_M_X64) && defined(CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY)
CPUID64(func, subfunc, output);
return true;
// Required by Visual Studio 2008 and below and Clang on Windows.
// Use it for all MSVC-compatible compilers.
#elif defined(_M_IX86) && defined(CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY)
__try
{
// Borland/Embarcadero and Issue 500
// Local variables for cpuid output
word32 a, b, c, d;
__asm
{
push ebx
mov eax, func
mov ecx, subfunc
cpuid
mov [a], eax
mov [b], ebx
mov [c], ecx
mov [d], edx
pop ebx
}
output[0] = a;
output[1] = b;
output[2] = c;
output[3] = d;
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
return false;
}
return true;
// Linux, Unix, OS X, Solaris, Cygwin, MinGW
#else
// longjmp and clobber warnings. Volatile is required.
// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
volatile bool result = true;
volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
if (oldHandler == SIG_ERR)
return false;
# ifndef __MINGW32__
volatile sigset_t oldMask;
if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask) != 0)
{
signal(SIGILL, oldHandler);
return false;
}
# endif
if (setjmp(s_jmpNoCPUID))
result = false;
else
{
asm volatile
(
// save ebx in case -fPIC is being used
# if CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64
"pushq %%rbx; cpuid; mov %%ebx, %%edi; popq %%rbx"
# else
"push %%ebx; cpuid; mov %%ebx, %%edi; pop %%ebx"
# endif
: "=a" (output[0]), "=D" (output[1]), "=c" (output[2]), "=d" (output[3])
: "a" (func), "c" (subfunc)
: "cc"
);
}
# ifndef __MINGW32__
sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
# endif
signal(SIGILL, oldHandler);
return result;
#endif
}
void DetectX86Features()
{
// Coverity finding CID 171239. Initialize arrays.
// Indexes: EAX=0, EBX=1, ECX=2, EDX=3
word32 cpuid0[4]={0}, cpuid1[4]={0}, cpuid2[4]={0};
#if defined(CRYPTOPP_DISABLE_ASM)
// Not available
goto done;
#else
if (!CpuId(0, 0, cpuid0))
goto done;
if (!CpuId(1, 0, cpuid1))
goto done;
#endif
CRYPTOPP_CONSTANT(EAX_REG = 0);
CRYPTOPP_CONSTANT(EBX_REG = 1);
CRYPTOPP_CONSTANT(ECX_REG = 2);
CRYPTOPP_CONSTANT(EDX_REG = 3);
CRYPTOPP_CONSTANT(MMX_FLAG = (1 << 24)); // EDX
CRYPTOPP_CONSTANT(SSE_FLAG = (1 << 25)); // EDX
CRYPTOPP_CONSTANT(SSE2_FLAG = (1 << 26)); // EDX
CRYPTOPP_CONSTANT(SSE3_FLAG = (1 << 0)); // ECX
CRYPTOPP_CONSTANT(SSSE3_FLAG = (1 << 9)); // ECX
CRYPTOPP_CONSTANT(SSE41_FLAG = (1 << 19)); // ECX
CRYPTOPP_CONSTANT(SSE42_FLAG = (1 << 20)); // ECX
CRYPTOPP_CONSTANT(MOVBE_FLAG = (1 << 22)); // ECX
CRYPTOPP_CONSTANT(AESNI_FLAG = (1 << 25)); // ECX
CRYPTOPP_CONSTANT(CLMUL_FLAG = (1 << 1)); // ECX
CRYPTOPP_CONSTANT(XSAVE_FLAG = (1 << 26)); // ECX
CRYPTOPP_CONSTANT(OSXSAVE_FLAG = (1 << 27)); // ECX
CRYPTOPP_CONSTANT(AVX_FLAG = (3 << 27)); // ECX
CRYPTOPP_CONSTANT(YMM_FLAG = (3 << 1)); // CR0
// x86_64 machines don't check some flags because SSE2
// is part of the core instruction set architecture
CRYPTOPP_UNUSED(MMX_FLAG); CRYPTOPP_UNUSED(SSE_FLAG);
CRYPTOPP_UNUSED(SSE2_FLAG); CRYPTOPP_UNUSED(SSE3_FLAG);
CRYPTOPP_UNUSED(XSAVE_FLAG);
#if (CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64)
// 64-bit core instruction set includes SSE2. Just check
// the OS enabled SSE2 support using OSXSAVE.
g_hasSSE2 = (cpuid1[ECX_REG] & OSXSAVE_FLAG) != 0;
#else
// Check the processor supports SSE2. Then use OSXSAVE to
// signal OS support for SSE2 to avoid probes.
// Also see http://stackoverflow.com/a/22521619/608639
// and http://github.com/weidai11/cryptopp/issues/511.
if ((cpuid1[EDX_REG] & SSE2_FLAG) == SSE2_FLAG)
g_hasSSE2 = (cpuid1[ECX_REG] & XSAVE_FLAG) != 0 &&
(cpuid1[ECX_REG] & OSXSAVE_FLAG) != 0;
#endif
// Solaris 11 i86pc does not signal SSE support using
// OSXSAVE. Additionally, Fedora 38 on a 2015 Celeron
// N3700 does not set OSXSAVE. So we need to explicitly
// probe for SSE support on rare occasions. Ugh...
if (g_hasSSE2 == false)
{
g_hasSSE2 = CPU_ProbeSSE2();
if (g_hasSSE2 == false)
goto done;
}
g_hasSSSE3 = (cpuid1[ECX_REG] & SSSE3_FLAG) != 0;
g_hasSSE41 = (cpuid1[ECX_REG] & SSE41_FLAG) != 0;
g_hasSSE42 = (cpuid1[ECX_REG] & SSE42_FLAG) != 0;
g_hasMOVBE = (cpuid1[ECX_REG] & MOVBE_FLAG) != 0;
g_hasAESNI = (cpuid1[ECX_REG] & AESNI_FLAG) != 0;
g_hasCLMUL = (cpuid1[ECX_REG] & CLMUL_FLAG) != 0;
// AVX is similar to SSE. Check if AVX is available on the cpu, then
// check if the OS enabled XSAVE/XRESTORE for the extended registers.
// https://software.intel.com/en-us/blogs/2011/04/14/is-avx-enabled
if ((cpuid1[ECX_REG] & AVX_FLAG) == AVX_FLAG)
{
word64 xcr0 = XGetBV(0);
g_hasAVX = (xcr0 & YMM_FLAG) == YMM_FLAG;
}
if (IsIntel(cpuid0))
{
CRYPTOPP_CONSTANT(RDRAND_FLAG = (1 << 30));
CRYPTOPP_CONSTANT(RDSEED_FLAG = (1 << 18));
CRYPTOPP_CONSTANT( ADX_FLAG = (1 << 19));
CRYPTOPP_CONSTANT( SHA_FLAG = (1 << 29));
CRYPTOPP_CONSTANT( AVX2_FLAG = (1 << 5));
g_isP4 = ((cpuid1[0] >> 8) & 0xf) == 0xf;
g_cacheLineSize = 8 * GETBYTE(cpuid1[1], 1);
g_hasRDRAND = (cpuid1[ECX_REG] & RDRAND_FLAG) != 0;
if (cpuid0[EAX_REG] >= 7)
{
if (CpuId(7, 0, cpuid2))
{
g_hasRDSEED = (cpuid2[EBX_REG] & RDSEED_FLAG) != 0;
g_hasADX = (cpuid2[EBX_REG] & ADX_FLAG) != 0;
g_hasSHA = (cpuid2[EBX_REG] & SHA_FLAG) != 0;
g_hasAVX2 = (cpuid2[EBX_REG] & AVX2_FLAG) != 0;
}
}
}
else if (IsAMD(cpuid0) || IsHygon(cpuid0))
{
CRYPTOPP_CONSTANT(RDRAND_FLAG = (1 << 30));
CRYPTOPP_CONSTANT(RDSEED_FLAG = (1 << 18));
CRYPTOPP_CONSTANT( ADX_FLAG = (1 << 19));
CRYPTOPP_CONSTANT( SHA_FLAG = (1 << 29));
CRYPTOPP_CONSTANT( AVX2_FLAG = (1 << 5));
CpuId(0x80000005, 0, cpuid2);
g_cacheLineSize = GETBYTE(cpuid2[ECX_REG], 0);
g_hasRDRAND = (cpuid1[ECX_REG] & RDRAND_FLAG) != 0;
if (cpuid0[EAX_REG] >= 7)
{
if (CpuId(7, 0, cpuid2))
{
g_hasRDSEED = (cpuid2[EBX_REG] & RDSEED_FLAG) != 0;
g_hasADX = (cpuid2[EBX_REG] & ADX_FLAG) != 0;
g_hasSHA = (cpuid2[EBX_REG] & SHA_FLAG) != 0;
g_hasAVX2 = (cpuid2[EBX_REG] & AVX2_FLAG) != 0;
}
}
// Unconditionally disable RDRAND and RDSEED on AMD cpu's with family 15h or 16h.
// See Crypto++ Issue 924, https://github.com/weidai11/cryptopp/issues/924,
// Clear RDRAND CPUID bit on AMD family 15h/16h, https://lore.kernel.org/patchwork/patch/1115413/,
// and AMD CPUID Specification, https://www.amd.com/system/files/TechDocs/25481.pdf
{
CRYPTOPP_CONSTANT(FAMILY_BASE_FLAG = (0x0f << 8));
CRYPTOPP_CONSTANT(FAMILY_EXT_FLAG = (0xff << 20));
word32 family = (cpuid1[0] & FAMILY_BASE_FLAG) >> 8;
if (family == 0xf)
family += (cpuid1[0] & FAMILY_EXT_FLAG) >> 20;
if (family == 0x15 || family == 0x16)
{
g_hasRDRAND = false;
g_hasRDSEED = false;
}
}
}
else if (IsVIA(cpuid0))
{
// Two bits: available and enabled
CRYPTOPP_CONSTANT( RNG_FLAGS = (0x3 << 2));
CRYPTOPP_CONSTANT( ACE_FLAGS = (0x3 << 6));
CRYPTOPP_CONSTANT(ACE2_FLAGS = (0x3 << 8));
CRYPTOPP_CONSTANT( PHE_FLAGS = (0x3 << 10));
CRYPTOPP_CONSTANT( PMM_FLAGS = (0x3 << 12));
CpuId(0xC0000000, 0, cpuid2);
word32 extendedFeatures = cpuid2[0];
if (extendedFeatures >= 0xC0000001)
{
CpuId(0xC0000001, 0, cpuid2);
g_hasPadlockRNG = (cpuid2[EDX_REG] & RNG_FLAGS) != 0;
g_hasPadlockACE = (cpuid2[EDX_REG] & ACE_FLAGS) != 0;
g_hasPadlockACE2 = (cpuid2[EDX_REG] & ACE2_FLAGS) != 0;
g_hasPadlockPHE = (cpuid2[EDX_REG] & PHE_FLAGS) != 0;
g_hasPadlockPMM = (cpuid2[EDX_REG] & PMM_FLAGS) != 0;
}
if (extendedFeatures >= 0xC0000005)
{
CpuId(0xC0000005, 0, cpuid2);
g_cacheLineSize = GETBYTE(cpuid2[ECX_REG], 0);
}
}
// Keep AVX2 in sync with OS support for AVX. AVX tests both
// cpu support and OS support, while AVX2 only tests cpu support.
g_hasAVX2 &= g_hasAVX;
done:
#if defined(_SC_LEVEL1_DCACHE_LINESIZE)
// Glibc does not implement on some platforms. The runtime returns 0 instead of error.
// https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/posix/sysconf.c
int cacheLineSize = (int)sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
if (g_cacheLineSize == 0 && cacheLineSize > 0)
g_cacheLineSize = cacheLineSize;
#endif
if (g_cacheLineSize == 0)
g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
*const_cast<volatile bool*>(&g_x86DetectionDone) = true;
}
// *************************** ARM-32, Aarch32 and Aarch64 ***************************
#elif (CRYPTOPP_BOOL_ARM32 || CRYPTOPP_BOOL_ARMV8)
bool CRYPTOPP_SECTION_INIT g_ArmDetectionDone = false;
bool CRYPTOPP_SECTION_INIT g_hasARMv7 = false;
bool CRYPTOPP_SECTION_INIT g_hasNEON = false;
bool CRYPTOPP_SECTION_INIT g_hasPMULL = false;
bool CRYPTOPP_SECTION_INIT g_hasCRC32 = false;
bool CRYPTOPP_SECTION_INIT g_hasAES = false;
bool CRYPTOPP_SECTION_INIT g_hasSHA1 = false;
bool CRYPTOPP_SECTION_INIT g_hasSHA2 = false;
bool CRYPTOPP_SECTION_INIT g_hasSHA512 = false;
bool CRYPTOPP_SECTION_INIT g_hasSHA3 = false;
bool CRYPTOPP_SECTION_INIT g_hasSM3 = false;
bool CRYPTOPP_SECTION_INIT g_hasSM4 = false;
word32 CRYPTOPP_SECTION_INIT g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
// ARM does not have an unprivileged equivalent to CPUID on IA-32. We have to
// jump through some hoops to detect features on a wide array of platforms.
// Our strategy is two part. First, attempt to *Query* the OS for a feature,
// like using getauxval on Linux. If that fails, then *Probe* the cpu
// executing an instruction and an observe a SIGILL if unsupported. The probes
// are in source files where compilation options like -march=armv8-a+crc make
// intrinsics available. They are expensive when compared to a standard OS
// feature query. Always perform the feature query first. For Linux see
// http://sourceware.org/ml/libc-help/2017-08/msg00012.html
// Avoid probes on Apple platforms because Apple's signal handling for SIGILLs
// appears broken. We are trying to figure out a way to feature test without
// probes. Also see http://stackoverflow.com/a/11197770/608639 and
// http://gist.github.com/erkanyildiz/390a480f27e86f8cd6ba.
extern bool CPU_ProbeARMv7();
extern bool CPU_ProbeNEON();
extern bool CPU_ProbeCRC32();
extern bool CPU_ProbeAES();
extern bool CPU_ProbeSHA1();
extern bool CPU_ProbeSHA256();
extern bool CPU_ProbeSHA512();
extern bool CPU_ProbeSHA3();
extern bool CPU_ProbeSM3();
extern bool CPU_ProbeSM4();
extern bool CPU_ProbePMULL();
// https://github.com/torvalds/linux/blob/master/arch/arm/include/uapi/asm/hwcap.h
// https://github.com/torvalds/linux/blob/master/arch/arm64/include/uapi/asm/hwcap.h
#ifndef HWCAP_ARMv7
# define HWCAP_ARMv7 (1 << 29)
#endif
#ifndef HWCAP_ASIMD
# define HWCAP_ASIMD (1 << 1)
#endif
#ifndef HWCAP_NEON
# define HWCAP_NEON (1 << 12)
#endif
#ifndef HWCAP_CRC32
# define HWCAP_CRC32 (1 << 7)
#endif
#ifndef HWCAP2_CRC32
# define HWCAP2_CRC32 (1 << 4)
#endif
#ifndef HWCAP_PMULL
# define HWCAP_PMULL (1 << 4)
#endif
#ifndef HWCAP2_PMULL
# define HWCAP2_PMULL (1 << 1)
#endif
#ifndef HWCAP_AES
# define HWCAP_AES (1 << 3)
#endif
#ifndef HWCAP2_AES
# define HWCAP2_AES (1 << 0)
#endif
#ifndef HWCAP_SHA1
# define HWCAP_SHA1 (1 << 5)
#endif
#ifndef HWCAP_SHA2
# define HWCAP_SHA2 (1 << 6)
#endif
#ifndef HWCAP2_SHA1
# define HWCAP2_SHA1 (1 << 2)
#endif
#ifndef HWCAP2_SHA2
# define HWCAP2_SHA2 (1 << 3)
#endif
#ifndef HWCAP_SHA3
# define HWCAP_SHA3 (1 << 17)
#endif
#ifndef HWCAP_SM3
# define HWCAP_SM3 (1 << 18)
#endif
#ifndef HWCAP_SM4
# define HWCAP_SM4 (1 << 19)
#endif
#ifndef HWCAP_SHA512
# define HWCAP_SHA512 (1 << 21)
#endif
inline bool CPU_QueryARMv7()
{
#if defined(__ANDROID__) && defined(__arm__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_ARMv7) != 0))
return true;
#elif defined(__linux__) && defined(__arm__)
if ((getauxval(AT_HWCAP) & HWCAP_ARMv7) != 0 ||
(getauxval(AT_HWCAP) & HWCAP_NEON) != 0)
return true;
#elif defined(__APPLE__) && defined(__arm__)
// Apple hardware is ARMv7 or above.
return true;
#elif defined(_WIN32) && defined(_M_ARM64)
// Windows 10 ARM64 is only supported on Armv8a and above
return true;
#endif
return false;
}
inline bool CPU_QueryNEON()
{
#if defined(__ANDROID__) && defined(__aarch64__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM64_FEATURE_ASIMD) != 0))
return true;
#elif defined(__ANDROID__) && defined(__arm__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0))
return true;
#elif defined(__linux__) && defined(__aarch64__)
if ((getauxval(AT_HWCAP) & HWCAP_ASIMD) != 0)
return true;
#elif defined(__linux__) && defined(__aarch32__)
if ((getauxval(AT_HWCAP2) & HWCAP2_ASIMD) != 0)
return true;
#elif defined(__linux__) && defined(__arm__)
if ((getauxval(AT_HWCAP) & HWCAP_NEON) != 0)
return true;
#elif defined(__APPLE__) && defined(__aarch64__)
// Core feature set for Aarch32 and Aarch64.
if (IsAppleMachineARMv8())
return true;
#elif defined(_WIN32) && defined(_M_ARM64)
// Windows 10 ARM64 is only supported on Armv8a and above
if (IsProcessorFeaturePresent(PF_ARM_V8_INSTRUCTIONS_AVAILABLE) != 0)
return true;
#endif
return false;
}
inline bool CPU_QueryCRC32()
{
#if defined(__ANDROID__) && defined(__aarch64__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM64_FEATURE_CRC32) != 0))
return true;
#elif defined(__ANDROID__) && defined(__aarch32__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_CRC32) != 0))
return true;
#elif defined(__linux__) && defined(__aarch64__)
if ((getauxval(AT_HWCAP) & HWCAP_CRC32) != 0)
return true;
#elif defined(__linux__) && defined(__aarch32__)
if ((getauxval(AT_HWCAP2) & HWCAP2_CRC32) != 0)
return true;
#elif defined(__APPLE__) && defined(__aarch64__)
// M1 processor
if (IsAppleMachineARMv82())
return true;
#elif defined(_WIN32) && defined(_M_ARM64)
if (IsProcessorFeaturePresent(PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE) != 0)
return true;
#endif
return false;
}
inline bool CPU_QueryPMULL()
{
#if defined(__ANDROID__) && defined(__aarch64__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM64_FEATURE_PMULL) != 0))
return true;
#elif defined(__ANDROID__) && defined(__aarch32__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_PMULL) != 0))
return true;
#elif defined(__linux__) && defined(__aarch64__)
if ((getauxval(AT_HWCAP) & HWCAP_PMULL) != 0)
return true;
#elif defined(__linux__) && defined(__aarch32__)
if ((getauxval(AT_HWCAP2) & HWCAP2_PMULL) != 0)
return true;
#elif defined(__APPLE__) && defined(__aarch64__)
// M1 processor
if (IsAppleMachineARMv82())
return true;
#elif defined(_WIN32) && defined(_M_ARM64)
if (IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE) != 0)
return true;
#endif
return false;
}
inline bool CPU_QueryAES()
{
#if defined(__ANDROID__) && defined(__aarch64__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM64_FEATURE_AES) != 0))
return true;
#elif defined(__ANDROID__) && defined(__aarch32__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_AES) != 0))
return true;
#elif defined(__linux__) && defined(__aarch64__)
if ((getauxval(AT_HWCAP) & HWCAP_AES) != 0)
return true;
#elif defined(__linux__) && defined(__aarch32__)
if ((getauxval(AT_HWCAP2) & HWCAP2_AES) != 0)
return true;
#elif defined(__APPLE__) && defined(__aarch64__)
// M1 processor
if (IsAppleMachineARMv82())
return true;
#elif defined(_WIN32) && defined(_M_ARM64)
if (IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE) != 0)
return true;
#endif
return false;
}
inline bool CPU_QuerySHA1()
{
#if defined(__ANDROID__) && defined(__aarch64__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM64_FEATURE_SHA1) != 0))
return true;
#elif defined(__ANDROID__) && defined(__aarch32__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_SHA1) != 0))
return true;
#elif defined(__linux__) && defined(__aarch64__)
if ((getauxval(AT_HWCAP) & HWCAP_SHA1) != 0)
return true;
#elif defined(__linux__) && defined(__aarch32__)
if ((getauxval(AT_HWCAP2) & HWCAP2_SHA1) != 0)
return true;
#elif defined(__APPLE__) && defined(__aarch64__)
// M1 processor
if (IsAppleMachineARMv82())
return true;
#elif defined(_WIN32) && defined(_M_ARM64)
if (IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE) != 0)
return true;
#endif
return false;