freebsd-dev/crypto/libdes/asm/x86unix.pl

254 lines
3.7 KiB
Perl

#!/usr/local/bin/perl
package x86ms;
$label="L000";
$align=($main'aout)?"4":"16";
$under=($main'aout)?"_":"";
$com_start=($main'sol)?"/":"#";
if ($main'cpp)
{
$align="ALIGN";
$under="";
$com_start='/*';
$com_end='*/';
}
%lb=( 'eax', '%al',
'ebx', '%bl',
'ecx', '%cl',
'edx', '%dl',
'ax', '%al',
'bx', '%bl',
'cx', '%cl',
'dx', '%dl',
);
%hb=( 'eax', '%ah',
'ebx', '%bh',
'ecx', '%ch',
'edx', '%dh',
'ax', '%ah',
'bx', '%bh',
'cx', '%ch',
'dx', '%dh',
);
%regs=( 'eax', '%eax',
'ebx', '%ebx',
'ecx', '%ecx',
'edx', '%edx',
'esi', '%esi',
'edi', '%edi',
'ebp', '%ebp',
'esp', '%esp',
);
sub main'LB
{
(defined($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{$_[0]});
}
sub main'DWP
{
local($addr,$reg1,$reg2,$idx)=@_;
$ret="";
$addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
$reg1="$regs{$reg1}" if defined($regs{$reg1});
$reg2="$regs{$reg2}" if defined($regs{$reg2});
$ret.=$addr if ($addr ne "") && ($addr ne 0);
if ($reg2 ne "")
{
$ret.="($reg1,$reg2,$idx)";
}
else
{
$ret.="($reg1)"
}
return($ret);
}
sub main'mov { &out2("movl",@_); }
sub main'movb { &out2("movb",@_); }
sub main'and { &out2("andl",@_); }
sub main'or { &out2("orl",@_); }
sub main'shl { &out2("shll",@_); }
sub main'shr { &out2("shrl",@_); }
sub main'xor { &out2("xorl",@_); }
sub main'add { &out2("addl",@_); }
sub main'sub { &out2("subl",@_); }
sub main'rotl { &out2("roll",@_); }
sub main'rotr { &out2("rorl",@_); }
sub main'exch { &out2("xchg",@_); }
sub main'cmp { &out2("cmpl",@_); }
sub main'jmp { &out1("jmp",@_); }
sub main'je { &out1("je",@_); }
sub main'jne { &out1("jne",@_); }
sub main'jnz { &out1("jnz",@_); }
sub main'dec { &out1("decl",@_); }
sub main'push { &out1("pushl",@_); }
sub main'call { &out1("call",$under.$_[0]); }
sub out2
{
local($name,$p1,$p2)=@_;
local($l,$ll,$t);
print "\t$name\t";
$t=&conv($p2).",";
$l=length($t);
print $t;
$ll=4-($l+9)/8;
print "\t" x $ll;
print &conv($p1);
print "\n";
}
sub out1
{
local($name,$p1)=@_;
local($l,$t);
print "\t$name\t";
print &conv($p1);
print "\n";
}
sub conv
{
local($p)=@_;
# $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
$p=$regs{$p} if (defined($regs{$p}));
$p =~ s/^([0-9A-Fa-f]+)$/\$$1/;
$p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
return $p;
}
sub main'file
{
local($file)=@_;
print <<"EOF";
.file "$file.s"
.version "01.01"
gcc2_compiled.:
EOF
}
sub main'function_begin
{
local($func,$num)=@_;
$params=$num*4;
$func=$under.$func;
print <<"EOF";
.text
.align $align
.globl $func
EOF
if ($main'cpp)
{ printf("\tTYPE($func,\@function)\n"); }
else { printf("\t.type $func,\@function\n"); }
print <<"EOF";
$func:
pushl %ebp
pushl %ebx
pushl %esi
pushl %edi
EOF
$stack=20;
}
sub main'function_end
{
local($func)=@_;
$func=$under.$func;
print <<"EOF";
popl %edi
popl %esi
popl %ebx
popl %ebp
ret
.${func}_end:
EOF
if ($main'cpp)
{ printf("\tSIZE($func,.${func}_end-$func)\n"); }
else { printf("\t.size\t$func,.${func}_end-$func\n"); }
print ".ident \"desasm.pl\"\n";
$stack=0;
%label=();
}
sub main'wparam
{
local($num)=@_;
return(&main'DWP($stack+$num*4,"esp","",0));
}
sub main'wtmp
{
local($num)=@_;
return(&main'DWP(-($num+1)*4,"esp","",0));
}
sub main'comment
{
foreach (@_)
{
if (/^\s*$/)
{ print "\n"; }
else
{ print "\t$com_start $_ $com_end\n"; }
}
}
sub main'label
{
if (!defined($label{$_[0]}))
{
$label{$_[0]}=".${label}${_[0]}";
$label++;
}
return($label{$_[0]});
}
sub main'set_label
{
if (!defined($label{$_[0]}))
{
$label{$_[0]}=".${label}${_[0]}";
$label++;
}
print ".align $align\n";
print "$label{$_[0]}:\n";
}
sub main'file_end
{
}