X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fx86cpuid.pl;h=c45b18356bb12814d028cd92c3a94292a2b23229;hb=a39aa18644d3338087a827c6555b18bc857346fe;hp=dca37e7cd265878d04a77d6dea0235add06e4c74;hpb=a90081576c94f9f54de1755188a00ccc1760549a;p=oweals%2Fopenssl.git

diff --git a/crypto/x86cpuid.pl b/crypto/x86cpuid.pl
index dca37e7cd2..c45b18356b 100644
--- a/crypto/x86cpuid.pl
+++ b/crypto/x86cpuid.pl
@@ -1,9 +1,19 @@
-#!/usr/bin/env perl
+#! /usr/bin/env perl
+# Copyright 2004-2016 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";
 
+$output = pop;
+open OUT,">$output";
+*STDOUT=*OUT;
+
 &asm_init($ARGV[0],"x86cpuid");
 
 for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
@@ -168,7 +178,7 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 	&ret	();
 &function_end_B("OPENSSL_rdtsc");
 
-# This works in Ring 0 only [read MS-DOS+privileged DPMI host],
+# This works in Ring 0 only [read DJGPP+MS-DOS+privileged DPMI host],
 # but it's safe to call it on any [supported] 32-bit platform...
 # Just check for [non-]zero return value...
 &function_begin_B("OPENSSL_instrument_halt","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
@@ -202,6 +212,41 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 	&ret	();
 &function_end_B("OPENSSL_instrument_halt");
 
+# Essentially there is only one use for this function. Under DJGPP:
+#
+#	#include <go32.h>
+#	...
+#	i=OPENSSL_far_spin(_dos_ds,0x46c);
+#	...
+# to obtain the number of spins till closest timer interrupt.
+
+&function_begin_B("OPENSSL_far_spin");
+	&pushf	();
+	&pop	("eax");
+	&bt	("eax",9);
+	&jnc	(&label("nospin"));	# interrupts are disabled
+
+	&mov	("eax",&DWP(4,"esp"));
+	&mov	("ecx",&DWP(8,"esp"));
+	&data_word (0x90d88e1e);	# push %ds, mov %eax,%ds
+	&xor	("eax","eax");
+	&mov	("edx",&DWP(0,"ecx"));
+	&jmp	(&label("spin"));
+
+	&align	(16);
+&set_label("spin");
+	&inc	("eax");
+	&cmp	("edx",&DWP(0,"ecx"));
+	&je	(&label("spin"));
+
+	&data_word (0x1f909090);	# pop	%ds
+	&ret	();
+
+&set_label("nospin");
+	&xor	("eax","eax");
+	&xor	("edx","edx");
+	&ret	();
+&function_end_B("OPENSSL_far_spin");
 
 &function_begin_B("OPENSSL_wipe_cpu","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
 	&xor	("eax","eax");
@@ -320,6 +365,31 @@ 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";
@@ -422,29 +492,64 @@ my $max = "ebp";
 &function_end("OPENSSL_instrument_bus2");
 }
 
-&function_begin_B("OPENSSL_ia32_rdrand");
+sub gen_random {
+my $rdop = shift;
+&function_begin_B("OPENSSL_ia32_${rdop}");
 	&mov	("ecx",8);
 &set_label("loop");
-	&rdrand	("eax");
+	&${rdop}("eax");
 	&jc	(&label("break"));
 	&loop	(&label("loop"));
 &set_label("break");
 	&cmp	("eax",0);
 	&cmove	("eax","ecx");
 	&ret	();
-&function_end_B("OPENSSL_ia32_rdrand");
+&function_end_B("OPENSSL_ia32_${rdop}");
+
+&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"));
 
-&function_begin_B("OPENSSL_ia32_rdseed");
 	&mov	("ecx",8);
 &set_label("loop");
-	&rdseed	("eax");
+	&${rdop}("edx");
 	&jc	(&label("break"));
 	&loop	(&label("loop"));
-&set_label("break");
-	&cmp	("eax",0);
-	&cmove	("eax","ecx");
+	&jmp	(&label("done"));
+
+&set_label("break",16);
+	&cmp	("ebx",4);
+	&jb	(&label("tail"));
+	&mov	(&DWP(0,"edi"),"edx");
+	&lea	("edi",&DWP(4,"edi"));
+	&add	("eax",4);
+	&sub	("ebx",4);
+	&jz	(&label("done"));
+	&mov	("ecx",8);
+	&jmp	(&label("loop"));
+
+&set_label("tail",16);
+	&mov	(&BP(0,"edi"),"dl");
+	&lea	("edi",&DWP(1,"edi"));
+	&inc	("eax");
+	&shr	("edx",8);
+	&dec	("ebx");
+	&jnz	(&label("tail"));
+
+&set_label("done");
+	&pop	("ebx");
+	&pop	("edi");
 	&ret	();
-&function_end_B("OPENSSL_ia32_rdseed");
+&function_end_B("OPENSSL_ia32_${rdop}_bytes");
+}
+&gen_random("rdrand");
+&gen_random("rdseed");
 
 &initseg("OPENSSL_cpuid_setup");
 
@@ -452,3 +557,5 @@ my $max = "ebp";
 &hidden("OPENSSL_ia32cap_P");
 
 &asm_finish();
+
+close STDOUT;