X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fx86cpuid.pl;h=d43dda4d935cbdee633b11fc62366d09c2a245ec;hp=70c8a2d671a50ee3347672e2278eb273507c94b8;hb=610ea181a85ffafdbebe5a123817becbbfdae30f;hpb=18f5603c5333744ddbe55c963ffd88bb3f59b0d7

diff --git a/crypto/x86cpuid.pl b/crypto/x86cpuid.pl
index 70c8a2d671..d43dda4d93 100644
--- a/crypto/x86cpuid.pl
+++ b/crypto/x86cpuid.pl
@@ -1,10 +1,20 @@
-#!/usr/bin/env perl
+#! /usr/bin/env perl
+# Copyright 2004-2018 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the OpenSSL license (the "License").  You may not use
+# this file except in compliance with the License.  You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
 
 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
 push(@INC, "${dir}perlasm", "perlasm");
 require "x86asm.pl";
 
-&asm_init($ARGV[0],"x86cpuid");
+$output = pop;
+open OUT,">$output";
+*STDOUT=*OUT;
+
+&asm_init($ARGV[0]);
 
 for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 
@@ -19,9 +29,11 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 	&pushf	();
 	&pop	("eax");
 	&xor	("ecx","eax");
-	&bt	("ecx",21);
-	&jnc	(&label("generic"));
 	&xor	("eax","eax");
+	&mov	("esi",&wparam(0));
+	&mov	(&DWP(8,"esi"),"eax");	# clear extended feature flags
+	&bt	("ecx",21);
+	&jnc	(&label("nocpuid"));
 	&cpuid	();
 	&mov	("edi","eax");		# max value for standard query level
 
@@ -67,6 +79,7 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 	&inc	("esi");		# number of cores
 
 	&mov	("eax",1);
+	&xor	("ecx","ecx");
 	&cpuid	();
 	&bt	("edx",28);
 	&jnc	(&label("generic"));
@@ -76,27 +89,28 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 	&ja	(&label("generic"));
 	&and	("edx",0xefffffff);	# clear hyper-threading bit
 	&jmp	(&label("generic"));
-	
+
 &set_label("intel");
 	&cmp	("edi",4);
-	&mov	("edi",-1);
+	&mov	("esi",-1);
 	&jb	(&label("nocacheinfo"));
 
 	&mov	("eax",4);
 	&mov	("ecx",0);		# query L1D
 	&cpuid	();
-	&mov	("edi","eax");
-	&shr	("edi",14);
-	&and	("edi",0xfff);		# number of cores -1 per L1D
+	&mov	("esi","eax");
+	&shr	("esi",14);
+	&and	("esi",0xfff);		# number of cores -1 per L1D
 
 &set_label("nocacheinfo");
 	&mov	("eax",1);
+	&xor	("ecx","ecx");
 	&cpuid	();
 	&and	("edx",0xbfefffff);	# force reserved bits #20, #30 to 0
 	&cmp	("ebp",0);
 	&jne	(&label("notintel"));
 	&or	("edx",1<<30);		# set reserved bit#30 on Intel CPUs
-	&and	(&HB("eax"),15);	# familiy ID
+	&and	(&HB("eax"),15);	# family ID
 	&cmp	(&HB("eax"),15);	# P4?
 	&jne	(&label("notintel"));
 	&or	("edx",1<<20);		# set reserved bit#20 to engage RC4_CHAR
@@ -104,7 +118,7 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 	&bt	("edx",28);		# test hyper-threading bit
 	&jnc	(&label("generic"));
 	&and	("edx",0xefffffff);
-	&cmp	("edi",0);
+	&cmp	("esi",0);
 	&je	(&label("generic"));
 
 	&or	("edx",0x10000000);
@@ -116,13 +130,20 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 &set_label("generic");
 	&and	("ebp",1<<11);		# isolate AMD XOP flag
 	&and	("ecx",0xfffff7ff);	# force 11th bit to 0
-	&mov	("esi","edx");
+	&mov	("esi","edx");		# %ebp:%esi is copy of %ecx:%edx
 	&or	("ebp","ecx");		# merge AMD XOP flag
 
-	&bt	("ecx",26);		# check XSAVE bit
-	&jnc	(&label("done"));
-	&bt	("ecx",27);		# check OSXSAVE bit
-	&jnc	(&label("clear_xmm"));
+	&cmp	("edi",7);
+	&mov	("edi",&wparam(0));
+	&jb	(&label("no_extended_info"));
+	&mov	("eax",7);
+	&xor	("ecx","ecx");
+	&cpuid	();
+	&mov	(&DWP(8,"edi"),"ebx");	# save extended feature flag
+&set_label("no_extended_info");
+
+	&bt	("ebp",27);		# check OSXSAVE bit
+	&jnc	(&label("clear_avx"));
 	&xor	("ecx","ecx");
 	&data_byte(0x0f,0x01,0xd0);	# xgetbv
 	&and	("eax",6);
@@ -135,9 +156,11 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 	&and	("esi",0xfeffffff);	# clear FXSR
 &set_label("clear_avx");
 	&and	("ebp",0xefffe7ff);	# clear AVX, FMA and AMD XOP bits
+	&and	(&DWP(8,"edi"),0xffffffdf);	# clear AVX2
 &set_label("done");
 	&mov	("eax","esi");
 	&mov	("edx","ebp");
+&set_label("nocpuid");
 &function_end("OPENSSL_ia32_cpuid");
 
 &external_label("OPENSSL_ia32cap_P");
@@ -166,7 +189,7 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 	&jnz	(&label("nohalt"));	# not enough privileges
 
 	&pushf	();
-	&pop	("eax")
+	&pop	("eax");
 	&bt	("eax",9);
 	&jnc	(&label("nohalt"));	# interrupts are disabled
 
@@ -197,7 +220,7 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 
 &function_begin_B("OPENSSL_far_spin");
 	&pushf	();
-	&pop	("eax")
+	&pop	("eax");
 	&bt	("eax",9);
 	&jnc	(&label("nospin"));	# interrupts are disabled
 
@@ -260,52 +283,13 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 &set_label("spin");
 	&lea	("ebx",&DWP(0,"eax","ecx"));
 	&nop	();
-	&data_word(0x1ab10ff0);	# lock;	cmpxchg	%ebx,(%edx)	# %eax is envolved and is always reloaded
+	&data_word(0x1ab10ff0);	# lock;	cmpxchg	%ebx,(%edx)	# %eax is involved and is always reloaded
 	&jne	(&label("spin"));
 	&mov	("eax","ebx");	# OpenSSL expects the new value
 	&pop	("ebx");
 	&ret	();
 &function_end_B("OPENSSL_atomic_add");
 
-# This function can become handy under Win32 in situations when
-# we don't know which calling convention, __stdcall or __cdecl(*),
-# indirect callee is using. In C it can be deployed as
-#
-#ifdef OPENSSL_CPUID_OBJ
-#	type OPENSSL_indirect_call(void *f,...);
-#	...
-#	OPENSSL_indirect_call(func,[up to $max arguments]);
-#endif
-#
-# (*)	it's designed to work even for __fastcall if number of
-#	arguments is 1 or 2!
-&function_begin_B("OPENSSL_indirect_call");
-	{
-	my $i,$max=7;		# $max has to be chosen as 4*n-1
-				# in order to preserve eventual
-				# stack alignment
-	&push	("ebp");
-	&mov	("ebp","esp");
-	&sub	("esp",$max*4);
-	&mov	("ecx",&DWP(12,"ebp"));
-	&mov	(&DWP(0,"esp"),"ecx");
-	&mov	("edx",&DWP(16,"ebp"));
-	&mov	(&DWP(4,"esp"),"edx");
-	for($i=2;$i<$max;$i++)
-		{
-		# Some copies will be redundant/bogus...
-		&mov	("eax",&DWP(12+$i*4,"ebp"));
-		&mov	(&DWP(0+$i*4,"esp"),"eax");
-		}
-	&call_ptr	(&DWP(8,"ebp"));# make the call...
-	&mov	("esp","ebp");	# ... and just restore the stack pointer
-				# without paying attention to what we called,
-				# (__cdecl *func) or (__stdcall *one).
-	&pop	("ebp");
-	&ret	();
-	}
-&function_end_B("OPENSSL_indirect_call");
-
 &function_begin_B("OPENSSL_cleanse");
 	&mov	("edx",&wparam(0));
 	&mov	("ecx",&wparam(1));
@@ -340,6 +324,31 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 	&ret	();
 &function_end_B("OPENSSL_cleanse");
 
+&function_begin_B("CRYPTO_memcmp");
+	&push	("esi");
+	&push	("edi");
+	&mov	("esi",&wparam(0));
+	&mov	("edi",&wparam(1));
+	&mov	("ecx",&wparam(2));
+	&xor	("eax","eax");
+	&xor	("edx","edx");
+	&cmp	("ecx",0);
+	&je	(&label("no_data"));
+&set_label("loop");
+	&mov	("dl",&BP(0,"esi"));
+	&lea	("esi",&DWP(1,"esi"));
+	&xor	("dl",&BP(0,"edi"));
+	&lea	("edi",&DWP(1,"edi"));
+	&or	("al","dl");
+	&dec	("ecx");
+	&jnz	(&label("loop"));
+	&neg	("eax");
+	&shr	("eax",31);
+&set_label("no_data");
+	&pop	("edi");
+	&pop	("esi");
+	&ret	();
+&function_end_B("CRYPTO_memcmp");
 {
 my $lasttick = "esi";
 my $lastdiff = "ebx";
@@ -442,6 +451,59 @@ my $max = "ebp";
 &function_end("OPENSSL_instrument_bus2");
 }
 
+sub gen_random {
+my $rdop = shift;
+&function_begin_B("OPENSSL_ia32_${rdop}_bytes");
+	&push	("edi");
+	&push	("ebx");
+	&xor	("eax","eax");		# return value
+	&mov	("edi",&wparam(0));
+	&mov	("ebx",&wparam(1));
+
+	&cmp	("ebx",0);
+	&je	(&label("done"));
+
+	&mov	("ecx",8);
+&set_label("loop");
+	&${rdop}("edx");
+	&jc	(&label("break"));
+	&loop	(&label("loop"));
+	&jmp	(&label("done"));
+
+&set_label("break",16);
+	&cmp	("ebx",4);
+	&jb	(&label("tail"));
+	&mov	(&DWP(0,"edi"),"edx");
+	&lea	("edi",&DWP(4,"edi"));
+	&add	("eax",4);
+	&sub	("ebx",4);
+	&jz	(&label("done"));
+	&mov	("ecx",8);
+	&jmp	(&label("loop"));
+
+&set_label("tail",16);
+	&mov	(&BP(0,"edi"),"dl");
+	&lea	("edi",&DWP(1,"edi"));
+	&inc	("eax");
+	&shr	("edx",8);
+	&dec	("ebx");
+	&jnz	(&label("tail"));
+
+&set_label("done");
+	&xor	("edx","edx");		# Clear random value from registers
+	&pop	("ebx");
+	&pop	("edi");
+	&ret	();
+&function_end_B("OPENSSL_ia32_${rdop}_bytes");
+}
+&gen_random("rdrand");
+&gen_random("rdseed");
+
 &initseg("OPENSSL_cpuid_setup");
 
+&hidden("OPENSSL_cpuid_setup");
+&hidden("OPENSSL_ia32cap_P");
+
 &asm_finish();
+
+close STDOUT;