473 lines
8.5 KiB
Perl
473 lines
8.5 KiB
Perl
#!/usr/bin/perl
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package x86unix;
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$label="L000";
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$align=($main::aout)?"4":"16";
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$under=($main::aout)?"_":"";
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$com_start=($main::sol)?"/":"#";
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sub main::asm_init_output { @out=(); }
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sub main::asm_get_output { return(@out); }
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sub main::get_labels { return(@labels); }
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sub main::external_label { push(@labels,@_); }
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if ($main::cpp)
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{
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$align="ALIGN";
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$under="";
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$com_start='/*';
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$com_end='*/';
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}
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%lb=( 'eax', '%al',
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'ebx', '%bl',
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'ecx', '%cl',
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'edx', '%dl',
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'ax', '%al',
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'bx', '%bl',
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'cx', '%cl',
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'dx', '%dl',
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);
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%hb=( 'eax', '%ah',
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'ebx', '%bh',
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'ecx', '%ch',
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'edx', '%dh',
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'ax', '%ah',
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'bx', '%bh',
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'cx', '%ch',
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'dx', '%dh',
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);
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%regs=( 'eax', '%eax',
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'ebx', '%ebx',
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'ecx', '%ecx',
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'edx', '%edx',
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'esi', '%esi',
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'edi', '%edi',
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'ebp', '%ebp',
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'esp', '%esp',
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'mm0', '%mm0',
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'mm1', '%mm1',
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);
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%reg_val=(
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'eax', 0x00,
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'ebx', 0x03,
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'ecx', 0x01,
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'edx', 0x02,
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'esi', 0x06,
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'edi', 0x07,
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'ebp', 0x05,
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'esp', 0x04,
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);
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sub main::LB
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{
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(defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
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return($lb{$_[0]});
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}
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sub main::HB
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{
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(defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
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return($hb{$_[0]});
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}
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sub main::DWP
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{
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local($addr,$reg1,$reg2,$idx)=@_;
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$ret="";
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$addr =~ s/(^|[+ \t])([A-Za-z_]+[A-Za-z0-9_]+)($|[+ \t])/$1$under$2$3/;
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$reg1="$regs{$reg1}" if defined($regs{$reg1});
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$reg2="$regs{$reg2}" if defined($regs{$reg2});
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$ret.=$addr if ($addr ne "") && ($addr ne 0);
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if ($reg2 ne "")
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{
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if($idx ne "")
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{ $ret.="($reg1,$reg2,$idx)"; }
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else
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{ $ret.="($reg1,$reg2)"; }
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}
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else
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{ $ret.="($reg1)" }
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return($ret);
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}
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sub main::BP
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{
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return(&main::DWP(@_));
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}
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sub main::BC
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{
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return @_;
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}
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sub main::DWC
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{
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return @_;
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}
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#sub main::BP
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# {
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# local($addr,$reg1,$reg2,$idx)=@_;
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#
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# $ret="";
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#
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# $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
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# $reg1="$regs{$reg1}" if defined($regs{$reg1});
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# $reg2="$regs{$reg2}" if defined($regs{$reg2});
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# $ret.=$addr if ($addr ne "") && ($addr ne 0);
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# if ($reg2 ne "")
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# { $ret.="($reg1,$reg2,$idx)"; }
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# else
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# { $ret.="($reg1)" }
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# return($ret);
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# }
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sub main::mov { &out2("movl",@_); }
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sub main::movb { &out2("movb",@_); }
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sub main::and { &out2("andl",@_); }
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sub main::or { &out2("orl",@_); }
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sub main::shl { &out2("sall",@_); }
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sub main::shr { &out2("shrl",@_); }
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sub main::xor { &out2("xorl",@_); }
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sub main::xorb { &out2("xorb",@_); }
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sub main::add { &out2("addl",@_); }
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sub main::adc { &out2("adcl",@_); }
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sub main::sub { &out2("subl",@_); }
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sub main::rotl { &out2("roll",@_); }
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sub main::rotr { &out2("rorl",@_); }
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sub main::exch { &out2("xchg",@_); }
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sub main::cmp { &out2("cmpl",@_); }
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sub main::lea { &out2("leal",@_); }
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sub main::mul { &out1("mull",@_); }
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sub main::div { &out1("divl",@_); }
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sub main::jmp { &out1("jmp",@_); }
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sub main::jmp_ptr { &out1p("jmp",@_); }
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sub main::je { &out1("je",@_); }
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sub main::jle { &out1("jle",@_); }
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sub main::jne { &out1("jne",@_); }
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sub main::jnz { &out1("jnz",@_); }
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sub main::jz { &out1("jz",@_); }
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sub main::jge { &out1("jge",@_); }
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sub main::jl { &out1("jl",@_); }
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sub main::jb { &out1("jb",@_); }
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sub main::jc { &out1("jc",@_); }
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sub main::jnc { &out1("jnc",@_); }
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sub main::jno { &out1("jno",@_); }
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sub main::dec { &out1("decl",@_); }
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sub main::inc { &out1("incl",@_); }
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sub main::push { &out1("pushl",@_); $stack+=4; }
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sub main::pop { &out1("popl",@_); $stack-=4; }
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sub main::not { &out1("notl",@_); }
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sub main::call { &out1("call",$under.$_[0]); }
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sub main::ret { &out0("ret"); }
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sub main::nop { &out0("nop"); }
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# The bswapl instruction is new for the 486. Emulate if i386.
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sub main::bswap
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{
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if ($main::i386)
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{
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&main::comment("bswapl @_");
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&main::exch(main::HB(@_),main::LB(@_));
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&main::rotr(@_,16);
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&main::exch(main::HB(@_),main::LB(@_));
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}
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else
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{
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&out1("bswapl",@_);
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}
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}
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sub out2
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{
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local($name,$p1,$p2)=@_;
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local($l,$ll,$t);
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local(%special)=( "roll",0xD1C0,"rorl",0xD1C8,
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"rcll",0xD1D0,"rcrl",0xD1D8,
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"shll",0xD1E0,"shrl",0xD1E8,
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"sarl",0xD1F8);
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if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
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{
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$op=$special{$name}|$reg_val{$p1};
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$tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
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$tmp2=sprintf(".byte %d\t",$op &0xff);
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push(@out,$tmp1);
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push(@out,$tmp2);
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$p2=&conv($p2);
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$p1=&conv($p1);
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&main::comment("$name $p2 $p1");
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return;
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}
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push(@out,"\t$name\t");
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$t=&conv($p2).",";
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$l=length($t);
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push(@out,$t);
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$ll=4-($l+9)/8;
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$tmp1=sprintf("\t" x $ll);
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push(@out,$tmp1);
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push(@out,&conv($p1)."\n");
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}
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sub out1
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{
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local($name,$p1)=@_;
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local($l,$t);
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local(%special)=("bswapl",0x0FC8);
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if ((defined($special{$name})) && defined($regs{$p1}))
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{
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$op=$special{$name}|$reg_val{$p1};
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$tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
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$tmp2=sprintf(".byte %d\t",$op &0xff);
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push(@out,$tmp1);
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push(@out,$tmp2);
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$p2=&conv($p2);
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$p1=&conv($p1);
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&main::comment("$name $p2 $p1");
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return;
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}
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push(@out,"\t$name\t".&conv($p1)."\n");
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}
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sub out1p
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{
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local($name,$p1)=@_;
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local($l,$t);
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push(@out,"\t$name\t*".&conv($p1)."\n");
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}
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sub out0
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{
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push(@out,"\t$_[0]\n");
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}
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sub conv
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{
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local($p)=@_;
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# $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
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$p=$regs{$p} if (defined($regs{$p}));
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$p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
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$p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
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return $p;
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}
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sub main::file
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{
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local($file)=@_;
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local($tmp)=<<"EOF";
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.file "$file.s"
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.version "01.01"
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EOF
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# Removed the next line from previous infile
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#gcc2_compiled.:
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push(@out,$tmp);
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}
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sub main::function_begin
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{
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local($func)=@_;
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&main::external_label($func);
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$func=$under.$func;
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local($tmp)=<<"EOF";
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.text
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.align $align
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.globl $func
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EOF
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push(@out,$tmp);
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if ($main::cpp)
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{ $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
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elsif ($main::gaswin)
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{ $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
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else { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
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push(@out,"$func:\n");
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$tmp=<<"EOF";
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pushl %ebp
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pushl %ebx
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pushl %esi
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pushl %edi
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EOF
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push(@out,$tmp);
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$stack=20;
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}
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sub main::function_begin_B
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{
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local($func,$extra)=@_;
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&main::external_label($func);
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$func=$under.$func;
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local($tmp)=<<"EOF";
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.text
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.align $align
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.globl $func
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EOF
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push(@out,$tmp);
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if ($main::cpp)
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{ push(@out,"\tTYPE($func,\@function)\n"); }
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elsif ($main::gaswin)
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{ $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
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else { push(@out,"\t.type $func,\@function\n"); }
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push(@out,"$func:\n");
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$stack=4;
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}
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sub main::function_end
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{
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local($func)=@_;
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$func=$under.$func;
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local($tmp)=<<"EOF";
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popl %edi
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popl %esi
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popl %ebx
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popl %ebp
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ret
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.${func}_end:
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EOF
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push(@out,$tmp);
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if ($main::cpp)
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{ push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
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elsif ($main::gaswin)
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{ $tmp=push(@out,"\t.align 4\n"); }
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else { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
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push(@out,".ident \"$func\"\n");
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$stack=0;
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%label=();
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}
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sub main::function_end_A
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{
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local($func)=@_;
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local($tmp)=<<"EOF";
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popl %edi
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popl %esi
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popl %ebx
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popl %ebp
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ret
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EOF
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push(@out,$tmp);
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}
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sub main::function_end_B
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{
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local($func)=@_;
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$func=$under.$func;
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push(@out,".L_${func}_end:\n");
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if ($main::cpp)
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{ push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
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elsif ($main::gaswin)
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{ push(@out,"\t.align 4\n"); }
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else { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
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push(@out,".ident \"desasm.pl\"\n");
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$stack=0;
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%label=();
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}
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sub main::wparam
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{
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local($num)=@_;
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return(&main::DWP($stack+$num*4,"esp","",0));
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}
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sub main::stack_push
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{
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local($num)=@_;
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$stack+=$num*4;
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&main::sub("esp",$num*4);
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}
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sub main::stack_pop
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{
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local($num)=@_;
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$stack-=$num*4;
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&main::add("esp",$num*4);
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}
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sub main::swtmp
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{
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return(&main::DWP($_[0]*4,"esp","",0));
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}
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# Should use swtmp, which is above esp. Linix can trash the stack above esp
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#sub main::wtmp
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# {
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# local($num)=@_;
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#
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# return(&main::DWP(-($num+1)*4,"esp","",0));
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# }
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sub main::comment
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{
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foreach (@_)
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{
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if (/^\s*$/)
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{ push(@out,"\n"); }
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else
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{ push(@out,"\t$com_start $_ $com_end\n"); }
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}
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}
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sub main::label
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{
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if (!defined($label{$_[0]}))
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{
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$label{$_[0]}=".${label}${_[0]}";
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$label++;
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}
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return($label{$_[0]});
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}
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sub main::set_label
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{
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if (!defined($label{$_[0]}))
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{
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$label{$_[0]}=".${label}${_[0]}";
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$label++;
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}
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push(@out,".align $align\n") if ($_[1] != 0);
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push(@out,"$label{$_[0]}:\n");
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}
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sub main::file_end
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{
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}
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sub main::data_word
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{
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push(@out,"\t.long $_[0]\n");
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}
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##
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## Additional functions required for MMX and other ops
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##
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sub main::testb { &out2('testb', @_) }
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sub main::movzx { &out2('movzx', @_) }
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sub main::movd { &out2('movd', @_) }
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sub main::emms { &out0('emms', @_) }
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