743 lines
14 KiB
Perl
743 lines
14 KiB
Perl
#!/usr/local/bin/perl
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package x86unix; # GAS actually...
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$label="L000";
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$const="";
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$constl=0;
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$align=($main'aout)?"4":"16";
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$under=($main'aout or $main'coff)?"_":"";
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$dot=($main'aout)?"":".";
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$com_start="#" if ($main'aout or $main'coff);
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sub main'asm_init_output { @out=(); }
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sub main'asm_get_output { return(@out); }
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sub main'get_labels { return(@labels); }
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sub main'external_label { push(@labels,@_); }
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if ($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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'mm2', '%mm2',
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'mm3', '%mm3',
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'mm4', '%mm4',
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'mm5', '%mm5',
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'mm6', '%mm6',
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'mm7', '%mm7',
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'xmm0', '%xmm0',
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'xmm1', '%xmm1',
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'xmm2', '%xmm2',
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'xmm3', '%xmm3',
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'xmm4', '%xmm4',
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'xmm5', '%xmm5',
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'xmm6', '%xmm6',
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'xmm7', '%xmm7',
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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 "" && $idx != 0)
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{ $ret.="($reg1,$reg2,$idx)"; }
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else
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{ $ret.="($reg1,$reg2)"; }
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}
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elsif ($reg1 ne "")
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{ $ret.="($reg1)" }
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return($ret);
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}
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sub main'QWP
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{
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return(&main'DWP(@_));
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}
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sub main'BP
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{
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return(&main'DWP(@_));
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}
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sub main'BC
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{
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return @_;
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}
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sub main'DWC
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{
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return @_;
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}
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#sub main'BP
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# {
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# local($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($ret);
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# }
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sub main'mov { &out2("movl",@_); }
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sub main'movb { &out2("movb",@_); }
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sub main'and { &out2("andl",@_); }
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sub main'or { &out2("orl",@_); }
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sub main'shl { &out2("sall",@_); }
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sub main'shr { &out2("shrl",@_); }
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sub main'xor { &out2("xorl",@_); }
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sub main'xorb { &out2("xorb",@_); }
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sub main'add { &out2($_[0]=~/%[a-d][lh]/?"addb":"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'sbb { &out2("sbbl",@_); }
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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($_[0]=~/%[a-d][lh]/?"xchgb":"xchgl",@_); }
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sub main'cmp { &out2("cmpl",@_); }
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sub main'lea { &out2("leal",@_); }
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sub main'mul { &out1("mull",@_); }
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sub main'div { &out1("divl",@_); }
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sub main'jmp { &out1("jmp",@_); }
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sub main'jmp_ptr { &out1p("jmp",@_); }
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sub main'je { &out1("je",@_); }
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sub main'jle { &out1("jle",@_); }
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sub main'jne { &out1("jne",@_); }
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sub main'jnz { &out1("jnz",@_); }
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sub main'jz { &out1("jz",@_); }
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sub main'jge { &out1("jge",@_); }
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sub main'jl { &out1("jl",@_); }
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sub main'ja { &out1("ja",@_); }
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sub main'jae { &out1("jae",@_); }
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sub main'jb { &out1("jb",@_); }
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sub main'jbe { &out1("jbe",@_); }
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sub main'jc { &out1("jc",@_); }
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sub main'jnc { &out1("jnc",@_); }
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sub main'jno { &out1("jno",@_); }
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sub main'dec { &out1("decl",@_); }
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sub main'inc { &out1($_[0]=~/%[a-d][hl]/?"incb":"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'pushf { &out0("pushfl"); $stack+=4; }
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sub main'popf { &out0("popfl"); $stack-=4; }
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sub main'not { &out1("notl",@_); }
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sub main'call { my $pre=$under;
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foreach $i (%label)
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{ if ($label{$i} eq $_[0]) { $pre=''; last; } }
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&out1("call",$pre.$_[0]);
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}
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sub main'ret { &out0("ret"); }
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sub main'nop { &out0("nop"); }
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sub main'test { &out2("testl",@_); }
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sub main'bt { &out2("btl",@_); }
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sub main'leave { &out0("leave"); }
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sub main'cpuid { &out0(".byte\t0x0f,0xa2"); }
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sub main'rdtsc { &out0(".byte\t0x0f,0x31"); }
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sub main'halt { &out0("hlt"); }
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sub main'movz { &out2("movzbl",@_); }
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# SSE2
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sub main'emms { &out0("emms"); }
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sub main'movd { &out2("movd",@_); }
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sub main'movq { &out2("movq",@_); }
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sub main'movdqu { &out2("movdqu",@_); }
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sub main'movdqa { &out2("movdqa",@_); }
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sub main'movdq2q{ &out2("movdq2q",@_); }
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sub main'movq2dq{ &out2("movq2dq",@_); }
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sub main'paddq { &out2("paddq",@_); }
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sub main'pmuludq{ &out2("pmuludq",@_); }
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sub main'psrlq { &out2("psrlq",@_); }
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sub main'psllq { &out2("psllq",@_); }
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sub main'pxor { &out2("pxor",@_); }
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sub main'por { &out2("por",@_); }
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sub main'pand { &out2("pand",@_); }
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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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EOF
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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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.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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{ $tmp=push(@out,"TYPE($func,\@function)\n"); }
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elsif ($main'coff)
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{ $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
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elsif ($main'aout and !$main'pic)
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{ }
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else { $tmp=push(@out,".type\t$func,\@function\n"); }
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push(@out,".align\t$align\n");
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push(@out,"$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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.globl $func
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EOF
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push(@out,$tmp);
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if ($main'cpp)
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{ push(@out,"TYPE($func,\@function)\n"); }
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elsif ($main'coff)
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{ $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
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elsif ($main'aout and !$main'pic)
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{ }
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else { push(@out,".type $func,\@function\n"); }
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push(@out,".align\t$align\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($tmp)=<<"EOF";
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popl %edi
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popl %esi
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popl %ebx
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popl %ebp
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ret
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${dot}L_${func}_end:
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EOF
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push(@out,$tmp);
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if ($main'cpp)
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{ push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
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elsif ($main'coff or $main'aout)
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{ }
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else { push(@out,".size\t$func,${dot}L_${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,"${dot}L_${func}_end:\n");
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if ($main'cpp)
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{ push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
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elsif ($main'coff or $main'aout)
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{ }
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else { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
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push(@out,".ident \"$func\"\n");
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$stack=0;
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%label=();
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}
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sub main'wparam
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{
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local($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(-($num+1)*4,"esp","",0));
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# }
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sub main'comment
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{
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if (!defined($com_start) or $main'elf)
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{ # Regarding $main'elf above...
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# GNU and SVR4 as'es use different comment delimiters,
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push(@out,"\n"); # so we just skip ELF comments...
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return;
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}
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foreach (@_)
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{
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if (/^\s*$/)
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{ push(@out,"\n"); }
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else
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{ push(@out,"\t$com_start $_ $com_end\n"); }
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}
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}
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sub main'public_label
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{
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$label{$_[0]}="${under}${_[0]}" if (!defined($label{$_[0]}));
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push(@out,".globl\t$label{$_[0]}\n");
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}
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sub main'label
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{
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if (!defined($label{$_[0]}))
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{
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$label{$_[0]}="${dot}${label}${_[0]}";
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$label++;
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}
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return($label{$_[0]});
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}
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sub main'set_label
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{
|
|
if (!defined($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($tmp);
|
|
|
|
push (@out,"\n.comm\t${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
|
|
.align $align
|
|
1:
|
|
___
|
|
push (@out,$tmp);
|
|
}
|
|
|
|
if ($const ne "")
|
|
{
|
|
push(@out,".section .rodata\n");
|
|
push(@out,$const);
|
|
$const="";
|
|
}
|
|
}
|
|
|
|
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
|
|
.align $align
|
|
___
|
|
}
|
|
elsif ($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;
|