x86cpuid.pl@ 85622

Last change on this file since 85622 was 83916, checked in by vboxsync, 5 years ago
openssl-1.1.1g: Applied and adjusted our OpenSSL changes to 1.1.1g. bugref:9719
File size: 12.2 KB

Line
1	#! /usr/bin/env perl
2	# Copyright 2004-2020 The OpenSSL Project Authors. All Rights Reserved.
3	#
4	# Licensed under the OpenSSL license (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	$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
10	push(@INC, "${dir}perlasm", "perlasm");
11	require "x86asm.pl";
12
13	$output = pop;
14	open OUT,">$output";
15	STDOUT=OUT;
16
17	&asm_init($ARGV[0]);
18
19	for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
20
21	&function_begin("OPENSSL_ia32_cpuid");
22	&xor ("edx","edx");
23	&pushf ();
24	&pop ("eax");
25	&mov ("ecx","eax");
26	&xor ("eax",1<<21);
27	&push ("eax");
28	&popf ();
29	&pushf ();
30	&pop ("eax");
31	&xor ("ecx","eax");
32	&xor ("eax","eax");
33	&mov ("esi",&wparam(0));
34	&mov (&DWP(8,"esi"),"eax"); # clear extended feature flags
35	&bt ("ecx",21);
36	&jnc (&label("nocpuid"));
37	&cpuid ();
38	&mov ("edi","eax"); # max value for standard query level
39
40	&xor ("eax","eax");
41	&cmp ("ebx",0x756e6547); # "Genu"
42	&setne (&LB("eax"));
43	&mov ("ebp","eax");
44	&cmp ("edx",0x49656e69); # "ineI"
45	&setne (&LB("eax"));
46	&or ("ebp","eax");
47	&cmp ("ecx",0x6c65746e); # "ntel"
48	&setne (&LB("eax"));
49	&or ("ebp","eax"); # 0 indicates Intel CPU
50	&jz (&label("intel"));
51
52	&cmp ("ebx",0x68747541); # "Auth"
53	&setne (&LB("eax"));
54	&mov ("esi","eax");
55	&cmp ("edx",0x69746E65); # "enti"
56	&setne (&LB("eax"));
57	&or ("esi","eax");
58	&cmp ("ecx",0x444D4163); # "cAMD"
59	&setne (&LB("eax"));
60	&or ("esi","eax"); # 0 indicates AMD CPU
61	&jnz (&label("intel"));
62
63	# AMD specific
64	&mov ("eax",0x80000000);
65	&cpuid ();
66	&cmp ("eax",0x80000001);
67	&jb (&label("intel"));
68	&mov ("esi","eax");
69	&mov ("eax",0x80000001);
70	&cpuid ();
71	&or ("ebp","ecx");
72	&and ("ebp",1<<11\|1); # isolate XOP bit
73	&cmp ("esi",0x80000008);
74	&jb (&label("intel"));
75
76	&mov ("eax",0x80000008);
77	&cpuid ();
78	&movz ("esi",&LB("ecx")); # number of cores - 1
79	&inc ("esi"); # number of cores
80
81	&mov ("eax",1);
82	&xor ("ecx","ecx");
83	&cpuid ();
84	&bt ("edx",28);
85	&jnc (&label("generic"));
86	&shr ("ebx",16);
87	&and ("ebx",0xff);
88	&cmp ("ebx","esi");
89	&ja (&label("generic"));
90	&and ("edx",0xefffffff); # clear hyper-threading bit
91	&jmp (&label("generic"));
92
93	&set_label("intel");
94	&cmp ("edi",4);
95	&mov ("esi",-1);
96	&jb (&label("nocacheinfo"));
97
98	&mov ("eax",4);
99	&mov ("ecx",0); # query L1D
100	&cpuid ();
101	&mov ("esi","eax");
102	&shr ("esi",14);
103	&and ("esi",0xfff); # number of cores -1 per L1D
104
105	&set_label("nocacheinfo");
106	&mov ("eax",1);
107	&xor ("ecx","ecx");
108	&cpuid ();
109	&and ("edx",0xbfefffff); # force reserved bits #20, #30 to 0
110	&cmp ("ebp",0);
111	&jne (&label("notintel"));
112	&or ("edx",1<<30); # set reserved bit#30 on Intel CPUs
113	&and (&HB("eax"),15); # family ID
114	&cmp (&HB("eax"),15); # P4?
115	&jne (&label("notintel"));
116	&or ("edx",1<<20); # set reserved bit#20 to engage RC4_CHAR
117	&set_label("notintel");
118	&bt ("edx",28); # test hyper-threading bit
119	&jnc (&label("generic"));
120	&and ("edx",0xefffffff);
121	&cmp ("esi",0);
122	&je (&label("generic"));
123
124	&or ("edx",0x10000000);
125	&shr ("ebx",16);
126	&cmp (&LB("ebx"),1);
127	&ja (&label("generic"));
128	&and ("edx",0xefffffff); # clear hyper-threading bit if not
129
130	&set_label("generic");
131	&and ("ebp",1<<11); # isolate AMD XOP flag
132	&and ("ecx",0xfffff7ff); # force 11th bit to 0
133	&mov ("esi","edx"); # %ebp:%esi is copy of %ecx:%edx
134	&or ("ebp","ecx"); # merge AMD XOP flag
135
136	&cmp ("edi",7);
137	&mov ("edi",&wparam(0));
138	&jb (&label("no_extended_info"));
139	&mov ("eax",7);
140	&xor ("ecx","ecx");
141	&cpuid ();
142	&mov (&DWP(8,"edi"),"ebx"); # save extended feature flag
143	&set_label("no_extended_info");
144
145	&bt ("ebp",27); # check OSXSAVE bit
146	&jnc (&label("clear_avx"));
147	&xor ("ecx","ecx");
148	&data_byte(0x0f,0x01,0xd0); # xgetbv
149	&and ("eax",6);
150	&cmp ("eax",6);
151	&je (&label("done"));
152	&cmp ("eax",2);
153	&je (&label("clear_avx"));
154	&set_label("clear_xmm");
155	&and ("ebp",0xfdfffffd); # clear AESNI and PCLMULQDQ bits
156	&and ("esi",0xfeffffff); # clear FXSR
157	&set_label("clear_avx");
158	&and ("ebp",0xefffe7ff); # clear AVX, FMA and AMD XOP bits
159	&and (&DWP(8,"edi"),0xffffffdf); # clear AVX2
160	&set_label("done");
161	&mov ("eax","esi");
162	&mov ("edx","ebp");
163	&set_label("nocpuid");
164	&function_end("OPENSSL_ia32_cpuid");
165
166	&external_label("OPENSSL_ia32cap_P");
167
168	&function_begin_B("OPENSSL_rdtsc","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
169	&xor ("eax","eax");
170	&xor ("edx","edx");
171	&picmeup("ecx","OPENSSL_ia32cap_P");
172	&bt (&DWP(0,"ecx"),4);
173	&jnc (&label("notsc"));
174	&rdtsc ();
175	&set_label("notsc");
176	&ret ();
177	&function_end_B("OPENSSL_rdtsc");
178
179	# This works in Ring 0 only [read DJGPP+MS-DOS+privileged DPMI host],
180	# but it's safe to call it on any [supported] 32-bit platform...
181	# Just check for [non-]zero return value...
182	&function_begin_B("OPENSSL_instrument_halt","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
183	&picmeup("ecx","OPENSSL_ia32cap_P");
184	&bt (&DWP(0,"ecx"),4);
185	&jnc (&label("nohalt")); # no TSC
186
187	&data_word(0x9058900e); # push %cs; pop %eax
188	&and ("eax",3);
189	&jnz (&label("nohalt")); # not enough privileges
190
191	&pushf ();
192	&pop ("eax");
193	&bt ("eax",9);
194	&jnc (&label("nohalt")); # interrupts are disabled
195
196	&rdtsc ();
197	&push ("edx");
198	&push ("eax");
199	&halt ();
200	&rdtsc ();
201
202	&sub ("eax",&DWP(0,"esp"));
203	&sbb ("edx",&DWP(4,"esp"));
204	&add ("esp",8);
205	&ret ();
206
207	&set_label("nohalt");
208	&xor ("eax","eax");
209	&xor ("edx","edx");
210	&ret ();
211	&function_end_B("OPENSSL_instrument_halt");
212
213	# Essentially there is only one use for this function. Under DJGPP:
214	#
215	# #include <go32.h>
216	# ...
217	# i=OPENSSL_far_spin(_dos_ds,0x46c);
218	# ...
219	# to obtain the number of spins till closest timer interrupt.
220
221	&function_begin_B("OPENSSL_far_spin");
222	&pushf ();
223	&pop ("eax");
224	&bt ("eax",9);
225	&jnc (&label("nospin")); # interrupts are disabled
226
227	&mov ("eax",&DWP(4,"esp"));
228	&mov ("ecx",&DWP(8,"esp"));
229	&data_word (0x90d88e1e); # push %ds, mov %eax,%ds
230	&xor ("eax","eax");
231	&mov ("edx",&DWP(0,"ecx"));
232	&jmp (&label("spin"));
233
234	&align (16);
235	&set_label("spin");
236	&inc ("eax");
237	&cmp ("edx",&DWP(0,"ecx"));
238	&je (&label("spin"));
239
240	&data_word (0x1f909090); # pop %ds
241	&ret ();
242
243	&set_label("nospin");
244	&xor ("eax","eax");
245	&xor ("edx","edx");
246	&ret ();
247	&function_end_B("OPENSSL_far_spin");
248
249	&function_begin_B("OPENSSL_wipe_cpu","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
250	&xor ("eax","eax");
251	&xor ("edx","edx");
252	&picmeup("ecx","OPENSSL_ia32cap_P");
253	&mov ("ecx",&DWP(0,"ecx"));
254	&bt (&DWP(0,"ecx"),1);
255	&jnc (&label("no_x87"));
256	if ($sse2) {
257	&and ("ecx",1<<26\|1<<24); # check SSE2 and FXSR bits
258	&cmp ("ecx",1<<26\|1<<24);
259	&jne (&label("no_sse2"));
260	&pxor ("xmm0","xmm0");
261	&pxor ("xmm1","xmm1");
262	&pxor ("xmm2","xmm2");
263	&pxor ("xmm3","xmm3");
264	&pxor ("xmm4","xmm4");
265	&pxor ("xmm5","xmm5");
266	&pxor ("xmm6","xmm6");
267	&pxor ("xmm7","xmm7");
268	&set_label("no_sse2");
269	}
270	# just a bunch of fldz to zap the fp/mm bank followed by finit...
271	&data_word(0xeed9eed9,0xeed9eed9,0xeed9eed9,0xeed9eed9,0x90e3db9b);
272	&set_label("no_x87");
273	&lea ("eax",&DWP(4,"esp"));
274	&ret ();
275	&function_end_B("OPENSSL_wipe_cpu");
276
277	&function_begin_B("OPENSSL_atomic_add");
278	&mov ("edx",&DWP(4,"esp")); # fetch the pointer, 1st arg
279	&mov ("ecx",&DWP(8,"esp")); # fetch the increment, 2nd arg
280	&push ("ebx");
281	&nop ();
282	&mov ("eax",&DWP(0,"edx"));
283	&set_label("spin");
284	&lea ("ebx",&DWP(0,"eax","ecx"));
285	&nop ();
286	&data_word(0x1ab10ff0); # lock; cmpxchg %ebx,(%edx) # %eax is involved and is always reloaded
287	&jne (&label("spin"));
288	&mov ("eax","ebx"); # OpenSSL expects the new value
289	&pop ("ebx");
290	&ret ();
291	&function_end_B("OPENSSL_atomic_add");
292
293	&function_begin_B("OPENSSL_cleanse");
294	&mov ("edx",&wparam(0));
295	&mov ("ecx",&wparam(1));
296	&xor ("eax","eax");
297	&cmp ("ecx",7);
298	&jae (&label("lot"));
299	&cmp ("ecx",0);
300	&je (&label("ret"));
301	&set_label("little");
302	&mov (&BP(0,"edx"),"al");
303	&sub ("ecx",1);
304	&lea ("edx",&DWP(1,"edx"));
305	&jnz (&label("little"));
306	&set_label("ret");
307	&ret ();
308
309	&set_label("lot",16);
310	&test ("edx",3);
311	&jz (&label("aligned"));
312	&mov (&BP(0,"edx"),"al");
313	&lea ("ecx",&DWP(-1,"ecx"));
314	&lea ("edx",&DWP(1,"edx"));
315	&jmp (&label("lot"));
316	&set_label("aligned");
317	&mov (&DWP(0,"edx"),"eax");
318	&lea ("ecx",&DWP(-4,"ecx"));
319	&test ("ecx",-4);
320	&lea ("edx",&DWP(4,"edx"));
321	&jnz (&label("aligned"));
322	&cmp ("ecx",0);
323	&jne (&label("little"));
324	&ret ();
325	&function_end_B("OPENSSL_cleanse");
326
327	&function_begin_B("CRYPTO_memcmp");
328	&push ("esi");
329	&push ("edi");
330	&mov ("esi",&wparam(0));
331	&mov ("edi",&wparam(1));
332	&mov ("ecx",&wparam(2));
333	&xor ("eax","eax");
334	&xor ("edx","edx");
335	&cmp ("ecx",0);
336	&je (&label("no_data"));
337	&set_label("loop");
338	&mov ("dl",&BP(0,"esi"));
339	&lea ("esi",&DWP(1,"esi"));
340	&xor ("dl",&BP(0,"edi"));
341	&lea ("edi",&DWP(1,"edi"));
342	&or ("al","dl");
343	&dec ("ecx");
344	&jnz (&label("loop"));
345	&neg ("eax");
346	&shr ("eax",31);
347	&set_label("no_data");
348	&pop ("edi");
349	&pop ("esi");
350	&ret ();
351	&function_end_B("CRYPTO_memcmp");
352	{
353	my $lasttick = "esi";
354	my $lastdiff = "ebx";
355	my $out = "edi";
356	my $cnt = "ecx";
357	my $max = "ebp";
358
359	&function_begin("OPENSSL_instrument_bus");
360	&mov ("eax",0);
361	if ($sse2) {
362	&picmeup("edx","OPENSSL_ia32cap_P");
363	&bt (&DWP(0,"edx"),4);
364	&jnc (&label("nogo")); # no TSC
365	&bt (&DWP(0,"edx"),19);
366	&jnc (&label("nogo")); # no CLFLUSH
367
368	&mov ($out,&wparam(0)); # load arguments
369	&mov ($cnt,&wparam(1));
370
371	# collect 1st tick
372	&rdtsc ();
373	&mov ($lasttick,"eax"); # lasttick = tick
374	&mov ($lastdiff,0); # lastdiff = 0
375	&clflush(&DWP(0,$out));
376	&data_byte(0xf0); # lock
377	&add (&DWP(0,$out),$lastdiff);
378	&jmp (&label("loop"));
379
380	&set_label("loop",16);
381	&rdtsc ();
382	&mov ("edx","eax"); # put aside tick (yes, I neglect edx)
383	&sub ("eax",$lasttick); # diff
384	&mov ($lasttick,"edx"); # lasttick = tick
385	&mov ($lastdiff,"eax"); # lastdiff = diff
386	&clflush(&DWP(0,$out));
387	&data_byte(0xf0); # lock
388	&add (&DWP(0,$out),"eax"); # accumulate diff
389	&lea ($out,&DWP(4,$out)); # ++$out
390	&sub ($cnt,1); # --$cnt
391	&jnz (&label("loop"));
392
393	&mov ("eax",&wparam(1));
394	&set_label("nogo");
395	}
396	&function_end("OPENSSL_instrument_bus");
397
398	&function_begin("OPENSSL_instrument_bus2");
399	&mov ("eax",0);
400	if ($sse2) {
401	&picmeup("edx","OPENSSL_ia32cap_P");
402	&bt (&DWP(0,"edx"),4);
403	&jnc (&label("nogo")); # no TSC
404	&bt (&DWP(0,"edx"),19);
405	&jnc (&label("nogo")); # no CLFLUSH
406
407	&mov ($out,&wparam(0)); # load arguments
408	&mov ($cnt,&wparam(1));
409	&mov ($max,&wparam(2));
410
411	&rdtsc (); # collect 1st tick
412	&mov ($lasttick,"eax"); # lasttick = tick
413	&mov ($lastdiff,0); # lastdiff = 0
414
415	&clflush(&DWP(0,$out));
416	&data_byte(0xf0); # lock
417	&add (&DWP(0,$out),$lastdiff);
418
419	&rdtsc (); # collect 1st diff
420	&mov ("edx","eax"); # put aside tick (yes, I neglect edx)
421	&sub ("eax",$lasttick); # diff
422	&mov ($lasttick,"edx"); # lasttick = tick
423	&mov ($lastdiff,"eax"); # lastdiff = diff
424	&jmp (&label("loop2"));
425
426	&set_label("loop2",16);
427	&clflush(&DWP(0,$out));
428	&data_byte(0xf0); # lock
429	&add (&DWP(0,$out),"eax"); # accumulate diff
430
431	&sub ($max,1);
432	&jz (&label("done2"));
433
434	&rdtsc ();
435	&mov ("edx","eax"); # put aside tick (yes, I neglect edx)
436	&sub ("eax",$lasttick); # diff
437	&mov ($lasttick,"edx"); # lasttick = tick
438	&cmp ("eax",$lastdiff);
439	&mov ($lastdiff,"eax"); # lastdiff = diff
440	&mov ("edx",0);
441	&setne ("dl");
442	&sub ($cnt,"edx"); # conditional --$cnt
443	&lea ($out,&DWP(0,$out,"edx",4)); # conditional ++$out
444	&jnz (&label("loop2"));
445
446	&set_label("done2");
447	&mov ("eax",&wparam(1));
448	&sub ("eax",$cnt);
449	&set_label("nogo");
450	}
451	&function_end("OPENSSL_instrument_bus2");
452	}
453
454	sub gen_random {
455	my $rdop = shift;
456	&function_begin_B("OPENSSL_ia32_${rdop}_bytes");
457	&push ("edi");
458	&push ("ebx");
459	&xor ("eax","eax"); # return value
460	&mov ("edi",&wparam(0));
461	&mov ("ebx",&wparam(1));
462
463	&cmp ("ebx",0);
464	&je (&label("done"));
465
466	&mov ("ecx",8);
467	&set_label("loop");
468	&${rdop}("edx");
469	&jc (&label("break"));
470	&loop (&label("loop"));
471	&jmp (&label("done"));
472
473	&set_label("break",16);
474	&cmp ("ebx",4);
475	&jb (&label("tail"));
476	&mov (&DWP(0,"edi"),"edx");
477	&lea ("edi",&DWP(4,"edi"));
478	&add ("eax",4);
479	&sub ("ebx",4);
480	&jz (&label("done"));
481	&mov ("ecx",8);
482	&jmp (&label("loop"));
483
484	&set_label("tail",16);
485	&mov (&BP(0,"edi"),"dl");
486	&lea ("edi",&DWP(1,"edi"));
487	&inc ("eax");
488	&shr ("edx",8);
489	&dec ("ebx");
490	&jnz (&label("tail"));
491
492	&set_label("done");
493	&xor ("edx","edx"); # Clear random value from registers
494	&pop ("ebx");
495	&pop ("edi");
496	&ret ();
497	&function_end_B("OPENSSL_ia32_${rdop}_bytes");
498	}
499	&gen_random("rdrand");
500	&gen_random("rdseed");
501
502	&initseg("OPENSSL_cpuid_setup");
503
504	&hidden("OPENSSL_cpuid_setup");
505	&hidden("OPENSSL_ia32cap_P");
506
507	&asm_finish();
508
509	close STDOUT or die "error closing STDOUT: $!";

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source: vbox/trunk/src/libs/openssl-1.1.1g/crypto/x86cpuid.pl@ 85622

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