[Pkg-openssl-changes] r259 - openssl/trunk/crypto

[kroeckx at alioth.debian.org]

Author: kroeckx
Date: 2007-10-25 21:51:55 +0000 (Thu, 25 Oct 2007)
New Revision: 259

Added:
   openssl/trunk/crypto/x86cpuid.pl
Log:
Add upstream source from 0.9.8g


Added: openssl/trunk/crypto/x86cpuid.pl
===================================================================
--- openssl/trunk/crypto/x86cpuid.pl	                        (rev 0)
+++ openssl/trunk/crypto/x86cpuid.pl	2007-10-25 21:51:55 UTC (rev 259)
@@ -0,0 +1,197 @@
+#!/usr/bin/env perl
+
+push(@INC,"perlasm");
+require "x86asm.pl";
+
+&asm_init($ARGV[0],"x86cpuid");
+
+for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
+
+&function_begin("OPENSSL_ia32_cpuid");
+	&xor	("edx","edx");
+	&pushf	();
+	&pop	("eax");
+	&mov	("ecx","eax");
+	&xor	("eax",1<<21);
+	&push	("eax");
+	&popf	();
+	&pushf	();
+	&pop	("eax");
+	&xor	("ecx","eax");
+	&bt	("ecx",21);
+	&jnc	(&label("nocpuid"));
+	&mov	("eax",1);
+	&cpuid	();
+&set_label("nocpuid");
+	&mov	("eax","edx");
+	&mov	("edx","ecx");
+&function_end("OPENSSL_ia32_cpuid");
+
+&external_label("OPENSSL_ia32cap_P");
+
+&function_begin_B("OPENSSL_rdtsc","EXTRN\t_OPENSSL_ia32cap_P:DWORD");
+	&xor	("eax","eax");
+	&xor	("edx","edx");
+	&picmeup("ecx","OPENSSL_ia32cap_P");
+	&bt	(&DWP(0,"ecx"),4);
+	&jnc	(&label("notsc"));
+	&rdtsc	();
+&set_label("notsc");
+	&ret	();
+&function_end_B("OPENSSL_rdtsc");
+
+# 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");
+	&picmeup("ecx","OPENSSL_ia32cap_P");
+	&bt	(&DWP(0,"ecx"),4);
+	&jnc	(&label("nohalt"));	# no TSC
+
+	&data_word(0x9058900e);		# push %cs; pop %eax
+	&and	("eax",3);
+	&jnz	(&label("nohalt"));	# not enough privileges
+
+	&pushf	();
+	&pop	("eax")
+	&bt	("eax",9);
+	&jnc	(&label("nohalt"));	# interrupts are disabled
+
+	&rdtsc	();
+	&push	("edx");
+	&push	("eax");
+	&halt	();
+	&rdtsc	();
+
+	&sub	("eax",&DWP(0,"esp"));
+	&sbb	("edx",&DWP(4,"esp"));
+	&add	("esp",8);
+	&ret	();
+
+&set_label("nohalt");
+	&xor	("eax","eax");
+	&xor	("edx","edx");
+	&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");
+	&xor	("edx","edx");
+	&picmeup("ecx","OPENSSL_ia32cap_P");
+	&mov	("ecx",&DWP(0,"ecx"));
+	&bt	(&DWP(0,"ecx"),1);
+	&jnc	(&label("no_x87"));
+	if ($sse2) {
+		&bt	(&DWP(0,"ecx"),26);
+		&jnc	(&label("no_sse2"));
+		&pxor	("xmm0","xmm0");
+		&pxor	("xmm1","xmm1");
+		&pxor	("xmm2","xmm2");
+		&pxor	("xmm3","xmm3");
+		&pxor	("xmm4","xmm4");
+		&pxor	("xmm5","xmm5");
+		&pxor	("xmm6","xmm6");
+		&pxor	("xmm7","xmm7");
+	&set_label("no_sse2");
+	}
+	# just a bunch of fldz to zap the fp/mm bank followed by finit...
+	&data_word(0xeed9eed9,0xeed9eed9,0xeed9eed9,0xeed9eed9,0x90e3db9b);
+&set_label("no_x87");
+	&lea	("eax",&DWP(4,"esp"));
+	&ret	();
+&function_end_B("OPENSSL_wipe_cpu");
+
+&function_begin_B("OPENSSL_atomic_add");
+	&mov	("edx",&DWP(4,"esp"));	# fetch the pointer, 1st arg
+	&mov	("ecx",&DWP(8,"esp"));	# fetch the increment, 2nd arg
+	&push	("ebx");
+	&nop	();
+	&mov	("eax",&DWP(0,"edx"));
+&set_label("spin");
+	&lea	("ebx",&DWP(0,"eax","ecx"));
+	&nop	();
+	&data_word(0x1ab10ff0);	# lock;	cmpxchg	%ebx,(%edx)	# %eax is envolved 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");
+
+&initseg("OPENSSL_cpuid_setup");
+
+&asm_finish();