#!/usr/local/bin/perl
package x86unix; # GAS actually...
$label="L000";
$const="";
$constl=0;
$align=($main'aout)?"4":"16";
$under=($main'aout or $main'coff)?"_":"";
$dot=($main'aout)?"":".";
$com_start="#" if ($main'aout or $main'coff);
sub main'asm_init_output { @out=(); }
sub main'asm_get_output { return(@out); }
sub main'get_labels { return(@labels); }
sub main'external_label { push(@labels,@_); }
if ($main'cpp)
{
$align="ALIGN";
$under="";
$com_start='/*';
$com_end='*/';
}
%lb=( 'eax', '%al',
'ebx', '%bl',
'ecx', '%cl',
'edx', '%dl',
'ax', '%al',
'bx', '%bl',
'cx', '%cl',
'dx', '%dl',
);
%hb=( 'eax', '%ah',
'ebx', '%bh',
'ecx', '%ch',
'edx', '%dh',
'ax', '%ah',
'bx', '%bh',
'cx', '%ch',
'dx', '%dh',
);
%regs=( 'eax', '%eax',
'ebx', '%ebx',
'ecx', '%ecx',
'edx', '%edx',
'esi', '%esi',
'edi', '%edi',
'ebp', '%ebp',
'esp', '%esp',
'mm0', '%mm0',
'mm1', '%mm1',
'mm2', '%mm2',
'mm3', '%mm3',
'mm4', '%mm4',
'mm5', '%mm5',
'mm6', '%mm6',
'mm7', '%mm7',
'xmm0', '%xmm0',
'xmm1', '%xmm1',
'xmm2', '%xmm2',
'xmm3', '%xmm3',
'xmm4', '%xmm4',
'xmm5', '%xmm5',
'xmm6', '%xmm6',
'xmm7', '%xmm7',
);
%reg_val=(
'eax', 0x00,
'ebx', 0x03,
'ecx', 0x01,
'edx', 0x02,
'esi', 0x06,
'edi', 0x07,
'ebp', 0x05,
'esp', 0x04,
);
sub main'LB
{
(defined($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="";
$addr =~ s/(^|[+ \t])([A-Za-z_]+[A-Za-z0-9_]+)($|[+ \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 ($reg2 ne "")
{
if($idx ne "" && $idx != 0)
{ $ret.="($reg1,$reg2,$idx)"; }
else
{ $ret.="($reg1,$reg2)"; }
}
elsif ($reg1 ne "")
{ $ret.="($reg1)" }
return($ret);
}
sub main'QWP
{
return(&main'DWP(@_));
}
sub main'BP
{
return(&main'DWP(@_));
}
sub main'BC
{
return @_;
}
sub main'DWC
{
return @_;
}
#sub main'BP
# {
# local($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($ret);
# }
sub main'mov { &out2("movl",@_); }
sub main'movb { &out2("movb",@_); }
sub main'and { &out2("andl",@_); }
sub main'or { &out2("orl",@_); }
sub main'shl { &out2("sall",@_); }
sub main'shr { &out2("shrl",@_); }
sub main'xor { &out2("xorl",@_); }
sub main'xorb { &out2("xorb",@_); }
sub main'add { &out2($_[0]=~/%[a-d][lh]/?"addb":"addl",@_); }
sub main'adc { &out2("adcl",@_); }
sub main'sub { &out2("subl",@_); }
sub main'sbb { &out2("sbbl",@_); }
sub main'rotl { &out2("roll",@_); }
sub main'rotr { &out2("rorl",@_); }
sub main'exch { &out2($_[0]=~/%[a-d][lh]/?"xchgb":"xchgl",@_); }
sub main'cmp { &out2("cmpl",@_); }
sub main'lea { &out2("leal",@_); }
sub main'mul { &out1("mull",@_); }
sub main'div { &out1("divl",@_); }
sub main'jmp { &out1("jmp",@_); }
sub main'jmp_ptr { &out1p("jmp",@_); }
sub main'je { &out1("je",@_); }
sub main'jle { &out1("jle",@_); }
sub main'jne { &out1("jne",@_); }
sub main'jnz { &out1("jnz",@_); }
sub main'jz { &out1("jz",@_); }
sub main'jge { &out1("jge",@_); }
sub main'jl { &out1("jl",@_); }
sub main'ja { &out1("ja",@_); }
sub main'jae { &out1("jae",@_); }
sub main'jb { &out1("jb",@_); }
sub main'jbe { &out1("jbe",@_); }
sub main'jc { &out1("jc",@_); }
sub main'jnc { &out1("jnc",@_); }
sub main'jno { &out1("jno",@_); }
sub main'dec { &out1("decl",@_); }
sub main'inc { &out1($_[0]=~/%[a-d][hl]/?"incb":"incl",@_); }
sub main'push { &out1("pushl",@_); $stack+=4; }
sub main'pop { &out1("popl",@_); $stack-=4; }
sub main'pushf { &out0("pushfl"); $stack+=4; }
sub main'popf { &out0("popfl"); $stack-=4; }
sub main'not { &out1("notl",@_); }
sub main'call { my $pre=$under;
foreach $i (%label)
{ if ($label{$i} eq $_[0]) { $pre=''; last; } }
&out1("call",$pre.$_[0]);
}
sub main'call_ptr { &out1p("call",@_); }
sub main'ret { &out0("ret"); }
sub main'nop { &out0("nop"); }
sub main'test { &out2("testl",@_); }
sub main'bt { &out2("btl",@_); }
sub main'leave { &out0("leave"); }
sub main'cpuid { &out0(".byte\t0x0f,0xa2"); }
sub main'rdtsc { &out0(".byte\t0x0f,0x31"); }
sub main'halt { &out0("hlt"); }
sub main'movz { &out2("movzbl",@_); }
sub main'neg { &out1("negl",@_); }
sub main'cld { &out0("cld"); }
# SSE2
sub main'emms { &out0("emms"); }
sub main'movd { &out2("movd",@_); }
sub main'movdqu { &out2("movdqu",@_); }
sub main'movdqa { &out2("movdqa",@_); }
sub main'movdq2q{ &out2("movdq2q",@_); }
sub main'movq2dq{ &out2("movq2dq",@_); }
sub main'paddq { &out2("paddq",@_); }
sub main'pmuludq{ &out2("pmuludq",@_); }
sub main'psrlq { &out2("psrlq",@_); }
sub main'psllq { &out2("psllq",@_); }
sub main'pxor { &out2("pxor",@_); }
sub main'por { &out2("por",@_); }
sub main'pand { &out2("pand",@_); }
sub main'movq {
local($p1,$p2,$optimize)=@_;
if ($optimize && $p1=~/^mm[0-7]$/ && $p2=~/^mm[0-7]$/)
# movq between mmx registers can sink Intel CPUs
{ push(@out,"\tpshufw\t\$0xe4,%$p2,%$p1\n"); }
else { &out2("movq",@_); }
}
# The bswapl instruction is new for the 486. Emulate if i386.
sub main'bswap
{
if ($main'i386)
{
&main'comment("bswapl @_");
&main'exch(main'HB(@_),main'LB(@_));
&main'rotr(@_,16);
&main'exch(main'HB(@_),main'LB(@_));
}
else
{
&out1("bswapl",@_);
}
}
sub out2
{
local($name,$p1,$p2)=@_;
local($l,$ll,$t);
local(%special)=( "roll",0xD1C0,"rorl",0xD1C8,
"rcll",0xD1D0,"rcrl",0xD1D8,
"shll",0xD1E0,"shrl",0xD1E8,
"sarl",0xD1F8);
if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
{
$op=$special{$name}|$reg_val{$p1};
$tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
$tmp2=sprintf(".byte %d\t",$op &0xff);
push(@out,$tmp1);
push(@out,$tmp2);
$p2=&conv($p2);
$p1=&conv($p1);
&main'comment("$name $p2 $p1");
return;
}
push(@out,"\t$name\t");
$t=&conv($p2).",";
$l=length($t);
push(@out,$t);
$ll=4-($l+9)/8;
$tmp1=sprintf("\t" x $ll);
push(@out,$tmp1);
push(@out,&conv($p1)."\n");
}
sub out1
{
local($name,$p1)=@_;
local($l,$t);
local(%special)=("bswapl",0x0FC8);
if ((defined($special{$name})) && defined($regs{$p1}))
{
$op=$special{$name}|$reg_val{$p1};
$tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
$tmp2=sprintf(".byte %d\t",$op &0xff);
push(@out,$tmp1);
push(@out,$tmp2);
$p2=&conv($p2);
$p1=&conv($p1);
&main'comment("$name $p2 $p1");
return;
}
push(@out,"\t$name\t".&conv($p1)."\n");
}
sub out1p
{
local($name,$p1)=@_;
local($l,$t);
push(@out,"\t$name\t*".&conv($p1)."\n");
}
sub out0
{
push(@out,"\t$_[0]\n");
}
sub conv
{
local($p)=@_;
# $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
$p=$regs{$p} if (defined($regs{$p}));
$p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
$p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
return $p;
}
sub main'file
{
local($file)=@_;
local($tmp)=<<"EOF";
.file "$file.s"
EOF
push(@out,$tmp);
}
sub main'function_begin
{
local($func)=@_;
&main'external_label($func);
$func=$under.$func;
local($tmp)=<<"EOF";
.text
.globl $func
EOF
push(@out,$tmp);
if ($main'cpp)
{ $tmp=push(@out,"TYPE($func,\@function)\n"); }
elsif ($main'coff)
{ $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
elsif ($main'aout and !$main'pic)
{ }
else { $tmp=push(@out,".type\t$func,\@function\n"); }
push(@out,".align\t$align\n");
push(@out,"$func:\n");
$tmp=<<"EOF";
pushl %ebp
pushl %ebx
pushl %esi
pushl %edi
EOF
push(@out,$tmp);
$stack=20;
}
sub main'function_begin_B
{
local($func,$extra)=@_;
&main'external_label($func);
$func=$under.$func;
local($tmp)=<<"EOF";
.text
.globl $func
EOF
push(@out,$tmp);
if ($main'cpp)
{ push(@out,"TYPE($func,\@function)\n"); }
elsif ($main'coff)
{ $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
elsif ($main'aout and !$main'pic)
{ }
else { push(@out,".type $func,\@function\n"); }
push(@out,".align\t$align\n");
push(@out,"$func:\n");
$stack=4;
}
sub main'function_end
{
local($func)=@_;
$func=$under.$func;
local($tmp)=<<"EOF";
popl %edi
popl %esi
popl %ebx
popl %ebp
ret
${dot}L_${func}_end:
EOF
push(@out,$tmp);
if ($main'cpp)
{ push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
elsif ($main'coff or $main'aout)
{ }
else { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
push(@out,".ident \"$func\"\n");
$stack=0;
%label=();
}
sub main'function_end_A
{
local($func)=@_;
local($tmp)=<<"EOF";
popl %edi
popl %esi
popl %ebx
popl %ebp
ret
EOF
push(@out,$tmp);
}
sub main'function_end_B
{
local($func)=@_;
$func=$under.$func;
push(@out,"${dot}L_${func}_end:\n");
if ($main'cpp)
{ push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
elsif ($main'coff or $main'aout)
{ }
else { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
push(@out,".ident \"$func\"\n");
$stack=0;
%label=();
}
sub main'wparam
{
local($num)=@_;
return(&main'DWP($stack+$num*4,"esp","",0));
}
sub main'stack_push
{
local($num)=@_;
$stack+=$num*4;
&main'sub("esp",$num*4);
}
sub main'stack_pop
{
local($num)=@_;
$stack-=$num*4;
&main'add("esp",$num*4);
}
sub main'swtmp
{
return(&main'DWP($_[0]*4,"esp","",0));
}
# Should use swtmp, which is above esp. Linix can trash the stack above esp
#sub main'wtmp
# {
# local($num)=@_;
#
# return(&main'DWP(-($num+1)*4,"esp","",0));
# }
sub main'comment
{
if (!defined($com_start) or $main'elf)
{ # Regarding $main'elf above...
# GNU and SVR4 as'es use different comment delimiters,
push(@out,"\n"); # so we just skip ELF comments...
return;
}
foreach (@_)
{
if (/^\s*$/)
{ push(@out,"\n"); }
else
{ push(@out,"\t$com_start $_ $com_end\n"); }
}
}
sub main'public_label
{
$label{$_[0]}="${under}${_[0]}" if (!defined($label{$_[0]}));
push(@out,".globl\t$label{$_[0]}\n");
}
sub main'label
{
if (!defined($label{$_[0]}))
{
$label{$_[0]}="${dot}${label}${_[0]}";
$label++;
}
return($label{$_[0]});
}
sub main'set_label
{
if (!defined($label{$_[0]}))
{
$label{$_[0]}="${dot}${label}${_[0]}";
$label++;
}
if ($_[1]!=0)
{
if ($_[1]>1) { main'align($_[1]); }
else { push(@out,".align $align\n"); }
}
push(@out,"$label{$_[0]}:\n");
}
sub main'file_end
{
# try to detect if SSE2 or MMX extensions were used on ELF platform...
if ($main'elf && grep {/%[x]*mm[0-7]/i} @out) {
local($tmp);
push (@out,"\n.section\t.bss\n");
push (@out,".comm\t${under}OPENSSL_ia32cap_P,4,4\n");
push (@out,".section\t.init\n");
# One can argue that it's wasteful to craft every
# SSE/MMX module with this snippet... Well, it's 72
# bytes long and for the moment we have two modules.
# Let's argue when we have 7 modules or so...
#
# $1<<10 sets a reserved bit to signal that variable
# was initialized already...
&main'picmeup("edx","OPENSSL_ia32cap_P");
$tmp=<<___;
cmpl \$0,(%edx)
jne 1f
movl \$1<<10,(%edx)
pushf
popl %eax
movl %eax,%ecx
xorl \$1<<21,%eax
pushl %eax
popf
pushf
popl %eax
xorl %ecx,%eax
btl \$21,%eax
jnc 1f
pushl %edi
pushl %ebx
movl %edx,%edi
movl \$1,%eax
.byte 0x0f,0xa2
orl \$1<<10,%edx
movl %edx,0(%edi)
popl %ebx
popl %edi
jmp 1f
.align $align
1:
___
push (@out,$tmp);
}
if ($const ne "")
{
push(@out,".section .rodata\n");
push(@out,$const);
$const="";
}
}
sub main'data_byte
{
push(@out,"\t.byte\t".join(',',@_)."\n");
}
sub main'data_word
{
push(@out,"\t.long\t".join(',',@_)."\n");
}
sub main'align
{
my $val=$_[0],$p2,$i;
if ($main'aout) {
for ($p2=0;$val!=0;$val>>=1) { $p2++; }
$val=$p2-1;
$val.=",0x90";
}
push(@out,".align\t$val\n");
}
# debug output functions: puts, putx, printf
sub main'puts
{
&pushvars();
&main'push('$Lstring' . ++$constl);
&main'call('puts');
$stack-=4;
&main'add("esp",4);
&popvars();
$const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
}
sub main'putx
{
&pushvars();
&main'push($_[0]);
&main'push('$Lstring' . ++$constl);
&main'call('printf');
&main'add("esp",8);
$stack-=8;
&popvars();
$const .= "Lstring$constl:\n\t.string \"\%X\"\n";
}
sub main'printf
{
$ostack = $stack;
&pushvars();
for ($i = @_ - 1; $i >= 0; $i--)
{
if ($i == 0) # change this to support %s format strings
{
&main'push('$Lstring' . ++$constl);
$const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
}
else
{
if ($_[$i] =~ /([0-9]*)\(%esp\)/)
{
&main'push(($1 + $stack - $ostack) . '(%esp)');
}
else
{
&main'push($_[$i]);
}
}
}
&main'call('printf');
$stack-=4*@_;
&main'add("esp",4*@_);
&popvars();
}
sub pushvars
{
&main'pushf();
&main'push("edx");
&main'push("ecx");
&main'push("eax");
}
sub popvars
{
&main'pop("eax");
&main'pop("ecx");
&main'pop("edx");
&main'popf();
}
sub main'picmeup
{
local($dst,$sym)=@_;
if ($main'cpp)
{
local($tmp)=<<___;
#if (defined(ELF) || defined(SOL)) && defined(PIC)
call 1f
1: popl $regs{$dst}
addl \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
movl $sym\@GOT($regs{$dst}),$regs{$dst}
#else
leal $sym,$regs{$dst}
#endif
___
push(@out,$tmp);
}
elsif ($main'pic && ($main'elf || $main'aout))
{
&main'call(&main'label("PIC_me_up"));
&main'set_label("PIC_me_up");
&main'blindpop($dst);
&main'add($dst,"\$${under}_GLOBAL_OFFSET_TABLE_+[.-".
&main'label("PIC_me_up") . "]");
&main'mov($dst,&main'DWP($under.$sym."\@GOT",$dst));
}
else
{
&main'lea($dst,&main'DWP($sym));
}
}
sub main'blindpop { &out1("popl",@_); }
sub main'initseg
{
local($f)=@_;
local($tmp);
if ($main'elf)
{
$tmp=<<___;
.section .init
call $under$f
jmp .Linitalign
.align $align
.Linitalign:
___
}
elsif ($main'coff)
{
$tmp=<<___; # applies to both Cygwin and Mingw
.section .ctors
.long $under$f
___
}
elsif ($main'aout)
{
local($ctor)="${under}_GLOBAL_\$I\$$f";
$tmp=".text\n";
$tmp.=".type $ctor,\@function\n" if ($main'pic);
$tmp.=<<___; # OpenBSD way...
.globl $ctor
.align 2
$ctor:
jmp $under$f
___
}
push(@out,$tmp) if ($tmp);
}
1;
|
