Beginnings of experimental support for NASM assembler. This is a free

assembler for various X86 platforms including Win32. It can output object files
that VC++ will tolerate so it could be used to provide assembly language support
to Win32 without the need for MASM.

This is preliminary stuff: it doesn't even work yet.

crypto/perlasm/x86asm.pl

@@ -29,6 +29,8 @@ sub main'asm_init
 		{ $cpp=1; require "x86unix.pl"; }
 	elsif (	($type eq "win32"))
 		{ $win32=1; require "x86ms.pl"; }
+	elsif (	($type eq "win32n"))
+		{ $win32=1; require "x86nasm.pl"; }
 	else
 		{
 		print STDERR <<"EOF";
@@ -38,6 +40,7 @@ Pick one target type from
 	sol	- x86 solaris
 	cpp	- format so x86unix.cpp can be used
 	win32	- Windows 95/Windows NT
+	win32n	- Windows 95/Windows NT NASM format
 EOF
 		exit(1);
 		}

crypto/perlasm/x86nasm.pl

+#!/usr/local/bin/perl
+
+package x86nasm;
+
+$label="L000";
+
+%lb=(	'eax',	'al',
+	'ebx',	'bl',
+	'ecx',	'cl',
+	'edx',	'dl',
+	'ax',	'al',
+	'bx',	'bl',
+	'cx',	'cl',
+	'dx',	'dl',
+	);
+
+%hb=(	'eax',	'ah',
+	'ebx',	'bh',
+	'ecx',	'ch',
+	'edx',	'dh',
+	'ax',	'ah',
+	'bx',	'bh',
+	'cx',	'ch',
+	'dx',	'dh',
+	);
+
+sub main'asm_init_output { @out=(); }
+sub main'asm_get_output { return(@out); }
+sub main'get_labels { return(@labels); }
+sub main'external_label { push(@labels,@_); push(@out, "EXTERN\t$_[0]"); }
+
+sub main'LB
+	{
+	(defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
+	return($lb{$_[0]});
+	}
+
+sub main'HB
+	{
+	(defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
+	return($hb{$_[0]});
+	}
+
+sub main'BP
+	{
+	&get_mem("BYTE",@_);
+	}
+
+sub main'DWP
+	{
+	&get_mem("DWORD",@_);
+	}
+
+sub main'stack_push
+	{
+	my($num)=@_;
+	$stack+=$num*4;
+	&main'sub("esp",$num*4);
+	}
+
+sub main'stack_pop
+	{
+	my($num)=@_;
+	$stack-=$num*4;
+	&main'add("esp",$num*4);
+	}
+
+sub get_mem
+	{
+	my($size,$addr,$reg1,$reg2,$idx)=@_;
+	my($t,$post);
+	my($ret)="[$size ";
+	$addr =~ s/^\s+//;
+	if ($addr =~ /^(.+)\+(.+)$/)
+		{
+		$reg2=&conv($1);
+		$addr="_$2";
+		}
+	elsif ($addr =~ /^[_a-zA-Z]/)
+		{
+		$addr="_$addr";
+		}
+
+	$reg1="$regs{$reg1}" if defined($regs{$reg1});
+	$reg2="$regs{$reg2}" if defined($regs{$reg2});
+	if (($addr ne "") && ($addr ne 0))
+		{
+		if ($addr !~ /^-/)
+			{ $ret.="${addr}+"; }
+		else	{ $post=$addr; }
+		}
+	if ($reg2 ne "")
+		{
+		$t="";
+		$t="*$idx" if ($idx != 0);
+		$reg1="+".$reg1 if ("$reg1$post" ne "");
+		$ret.="$reg2$t$reg1$post]";
+		}
+	else
+		{
+		$ret.="$reg1$post]"
+		}
+	return($ret);
+	}
+
+sub main'mov	{ &out2("mov",@_); }
+sub main'movb	{ &out2("mov",@_); }
+sub main'and	{ &out2("and",@_); }
+sub main'or	{ &out2("or",@_); }
+sub main'shl	{ &out2("shl",@_); }
+sub main'shr	{ &out2("shr",@_); }
+sub main'xor	{ &out2("xor",@_); }
+sub main'xorb	{ &out2("xor",@_); }
+sub main'add	{ &out2("add",@_); }
+sub main'adc	{ &out2("adc",@_); }
+sub main'sub	{ &out2("sub",@_); }
+sub main'rotl	{ &out2("rol",@_); }
+sub main'rotr	{ &out2("ror",@_); }
+sub main'exch	{ &out2("xchg",@_); }
+sub main'cmp	{ &out2("cmp",@_); }
+sub main'lea	{ &out2("lea",@_); }
+sub main'mul	{ &out1("mul",@_); }
+sub main'div	{ &out1("div",@_); }
+sub main'dec	{ &out1("dec",@_); }
+sub main'inc	{ &out1("inc",@_); }
+sub main'jmp	{ &out1("jmp",@_); }
+sub main'jmp_ptr { &out1p("jmp",@_); }
+
+# This is a bit of a kludge: declare all branches as NEAR.
+sub main'je	{ &out1("je NEAR",@_); }
+sub main'jle	{ &out1("jle NEAR",@_); }
+sub main'jz	{ &out1("jz NEAR",@_); }
+sub main'jge	{ &out1("jge NEAR",@_); }
+sub main'jl	{ &out1("jl NEAR",@_); }
+sub main'jb	{ &out1("jb NEAR",@_); }
+sub main'jc	{ &out1("jc NEAR",@_); }
+sub main'jnc	{ &out1("jnc NEAR",@_); }
+sub main'jnz	{ &out1("jnz NEAR",@_); }
+sub main'jne	{ &out1("jne NEAR",@_); }
+sub main'jno	{ &out1("jno NEAR",@_); }
+
+sub main'push	{ &out1("push",@_); $stack+=4; }
+sub main'pop	{ &out1("pop",@_); $stack-=4; }
+sub main'bswap	{ &out1("bswap",@_); &using486(); }
+sub main'not	{ &out1("not",@_); }
+sub main'call	{ &out1("call",'_'.$_[0]); }
+sub main'ret	{ &out0("ret"); }
+sub main'nop	{ &out0("nop"); }
+
+sub out2
+	{
+	my($name,$p1,$p2)=@_;
+	my($l,$t);
+
+	push(@out,"\t$name\t");
+	$t=&conv($p1).",";
+	$l=length($t);
+	push(@out,$t);
+	$l=4-($l+9)/8;
+	push(@out,"\t" x $l);
+	push(@out,&conv($p2));
+	push(@out,"\n");
+	}
+
+sub out0
+	{
+	my($name)=@_;
+
+	push(@out,"\t$name\n");
+	}
+
+sub out1
+	{
+	my($name,$p1)=@_;
+	my($l,$t);
+	push(@out,"\t$name\t".&conv($p1)."\n");
+	}
+
+sub conv
+	{
+	my($p)=@_;
+	$p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
+	return $p;
+	}
+
+sub using486
+	{
+	return if $using486;
+	$using486++;
+	grep(s/\.386/\.486/,@out);
+	}
+
+sub main'file
+	{
+	push(@out, "segment .text");
+	}
+
+sub main'function_begin
+	{
+	my($func,$extra)=@_;
+
+	push(@labels,$func);
+	my($tmp)=<<"EOF";
+GLOBAL	_$func
+_$func:
+	push	ebp
+	push	ebx
+	push	esi
+	push	edi
+EOF
+	push(@out,$tmp);
+	$stack=20;
+	}
+
+sub main'function_begin_B
+	{
+	my($func,$extra)=@_;
+	my($tmp)=<<"EOF";
+GLOBAL	_$func
+_$func:
+EOF
+	push(@out,$tmp);
+	$stack=4;
+	}
+
+sub main'function_end
+	{
+	my($func)=@_;
+
+	my($tmp)=<<"EOF";
+	pop	edi
+	pop	esi
+	pop	ebx
+	pop	ebp
+	ret
+EOF
+	push(@out,$tmp);
+	$stack=0;
+	%label=();
+	}
+
+sub main'function_end_B
+	{
+	$stack=0;
+	%label=();
+	}
+
+sub main'function_end_A
+	{
+	my($func)=@_;
+
+	my($tmp)=<<"EOF";
+	pop	edi
+	pop	esi
+	pop	ebx
+	pop	ebp
+	ret
+EOF
+	push(@out,$tmp);
+	}
+
+sub main'file_end
+	{
+	}
+
+sub main'wparam
+	{
+	my($num)=@_;
+
+	return(&main'DWP($stack+$num*4,"esp","",0));
+	}
+
+sub main'swtmp
+	{
+	return(&main'DWP($_[0]*4,"esp","",0));
+	}
+
+# Should use swtmp, which is above esp.  Linix can trash the stack above esp
+#sub main'wtmp
+#	{
+#	my($num)=@_;
+#
+#	return(&main'DWP(-(($num+1)*4),"esp","",0));
+#	}
+
+sub main'comment
+	{
+	foreach (@_)
+		{
+		push(@out,"\t; $_\n");
+		}
+	}
+
+sub main'label
+	{
+	if (!defined($label{$_[0]}))
+		{
+		$label{$_[0]}="\$${label}${_[0]}";
+		$label++;
+		}
+	return($label{$_[0]});
+	}
+
+sub main'set_label
+	{
+	if (!defined($label{$_[0]}))
+		{
+		$label{$_[0]}="${label}${_[0]}";
+		$label++;
+		}
+	push(@out,"$label{$_[0]}:\n");
+	}
+
+sub main'data_word
+	{
+	push(@out,"\tDD\t$_[0]\n");
+	}
+
+sub out1p
+	{
+	my($name,$p1)=@_;
+	my($l,$t);
+
+	push(@out,"\t$name\t ".&conv($p1)."\n");
+	}