crypto/perlasm/x86ms.pl

   1 #!/usr/local/bin/perl
   2
   3 package x86ms;
   4
   5 $label="L000";
   6
   7 %lb=(   'eax',  'al',
   8         'ebx',  'bl',
   9         'ecx',  'cl',
  10         'edx',  'dl',
  11         'ax',   'al',
  12         'bx',   'bl',
  13         'cx',   'cl',
  14         'dx',   'dl',
  15         );
  16
  17 %hb=(   'eax',  'ah',
  18         'ebx',  'bh',
  19         'ecx',  'ch',
  20         'edx',  'dh',
  21         'ax',   'ah',
  22         'bx',   'bh',
  23         'cx',   'ch',
  24         'dx',   'dh',
  25         );
  26
  27 sub main'asm_init_output { @out=(); }
  28 sub main'asm_get_output { return(@out); }
  29 sub main'get_labels { return(@labels); }
  30 sub main'external_label { push(@labels,@_); }
  31
  32 sub main'LB
  33         {
  34         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  35         return($lb{$_[0]});
  36         }
  37
  38 sub main'HB
  39         {
  40         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  41         return($hb{$_[0]});
  42         }
  43
  44 sub main'BP
  45         {
  46         &get_mem("BYTE",@_);
  47         }
  48
  49 sub main'DWP
  50         {
  51         &get_mem("DWORD",@_);
  52         }
  53
  54 sub main'stack_push
  55         {
  56         local($num)=@_;
  57         $stack+=$num*4;
  58         &main'sub("esp",$num*4);
  59         }
  60
  61 sub main'stack_pop
  62         {
  63         local($num)=@_;
  64         $stack-=$num*4;
  65         &main'add("esp",$num*4);
  66         }
  67
  68 sub get_mem
  69         {
  70         local($size,$addr,$reg1,$reg2,$idx)=@_;
  71         local($t,$post);
  72         local($ret)="$size PTR ";
  73
  74         $addr =~ s/^\s+//;
  75         if ($addr =~ /^(.+)\+(.+)$/)
  76                 {
  77                 $reg2=&conv($1);
  78                 $addr="_$2";
  79                 }
  80         elsif ($addr =~ /^[_a-zA-Z]/)
  81                 {
  82                 $addr="_$addr";
  83                 }
  84
  85         $reg1="$regs{$reg1}" if defined($regs{$reg1});
  86         $reg2="$regs{$reg2}" if defined($regs{$reg2});
  87         if (($addr ne "") && ($addr ne 0))
  88                 {
  89                 if ($addr !~ /^-/)
  90                         { $ret.=$addr; }
  91                 else    { $post=$addr; }
  92                 }
  93         if ($reg2 ne "")
  94                 {
  95                 $t="";
  96                 $t="*$idx" if ($idx != 0);
  97                 $reg1="+".$reg1 if ("$reg1$post" ne "");
  98                 $ret.="[$reg2$t$reg1$post]";
  99                 }
 100         else
 101                 {
 102                 $ret.="[$reg1$post]"
 103                 }
 104         return($ret);
 105         }
 106
 107 sub main'mov    { &out2("mov",@_); }
 108 sub main'movb   { &out2("mov",@_); }
 109 sub main'and    { &out2("and",@_); }
 110 sub main'or     { &out2("or",@_); }
 111 sub main'shl    { &out2("shl",@_); }
 112 sub main'shr    { &out2("shr",@_); }
 113 sub main'xor    { &out2("xor",@_); }
 114 sub main'xorb   { &out2("xor",@_); }
 115 sub main'add    { &out2("add",@_); }
 116 sub main'adc    { &out2("adc",@_); }
 117 sub main'sub    { &out2("sub",@_); }
 118 sub main'rotl   { &out2("rol",@_); }
 119 sub main'rotr   { &out2("ror",@_); }
 120 sub main'exch   { &out2("xchg",@_); }
 121 sub main'cmp    { &out2("cmp",@_); }
 122 sub main'lea    { &out2("lea",@_); }
 123 sub main'mul    { &out1("mul",@_); }
 124 sub main'div    { &out1("div",@_); }
 125 sub main'dec    { &out1("dec",@_); }
 126 sub main'inc    { &out1("inc",@_); }
 127 sub main'jmp    { &out1("jmp",@_); }
 128 sub main'jmp_ptr { &out1p("jmp",@_); }
 129 sub main'je     { &out1("je",@_); }
 130 sub main'jle    { &out1("jle",@_); }
 131 sub main'jz     { &out1("jz",@_); }
 132 sub main'jge    { &out1("jge",@_); }
 133 sub main'jl     { &out1("jl",@_); }
 134 sub main'jb     { &out1("jb",@_); }
 135 sub main'jc     { &out1("jc",@_); }
 136 sub main'jnc    { &out1("jnc",@_); }
 137 sub main'jnz    { &out1("jnz",@_); }
 138 sub main'jne    { &out1("jne",@_); }
 139 sub main'jno    { &out1("jno",@_); }
 140 sub main'push   { &out1("push",@_); $stack+=4; }
 141 sub main'pop    { &out1("pop",@_); $stack-=4; }
 142 sub main'bswap  { &out1("bswap",@_); &using486(); }
 143 sub main'not    { &out1("not",@_); }
 144 sub main'call   { &out1("call",'_'.$_[0]); }
 145 sub main'ret    { &out0("ret"); }
 146 sub main'nop    { &out0("nop"); }
 147
 148 sub out2
 149         {
 150         local($name,$p1,$p2)=@_;
 151         local($l,$t);
 152
 153         push(@out,"\t$name\t");
 154         $t=&conv($p1).",";
 155         $l=length($t);
 156         push(@out,$t);
 157         $l=4-($l+9)/8;
 158         push(@out,"\t" x $l);
 159         push(@out,&conv($p2));
 160         push(@out,"\n");
 161         }
 162
 163 sub out0
 164         {
 165         local($name)=@_;
 166
 167         push(@out,"\t$name\n");
 168         }
 169
 170 sub out1
 171         {
 172         local($name,$p1)=@_;
 173         local($l,$t);
 174
 175         push(@out,"\t$name\t".&conv($p1)."\n");
 176         }
 177
 178 sub conv
 179         {
 180         local($p)=@_;
 181
 182         $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 183         return $p;
 184         }
 185
 186 sub using486
 187         {
 188         return if $using486;
 189         $using486++;
 190         grep(s/\.386/\.486/,@out);
 191         }
 192
 193 sub main'file
 194         {
 195         local($file)=@_;
 196
 197         local($tmp)=<<"EOF";
 198         TITLE   $file.asm
 199         .386
 200 .model FLAT
 201 EOF
 202         push(@out,$tmp);
 203         }
 204
 205 sub main'function_begin
 206         {
 207         local($func,$extra)=@_;
 208
 209         push(@labels,$func);
 210
 211         local($tmp)=<<"EOF";
 212 _TEXT   SEGMENT
 213 PUBLIC  _$func
 214 $extra
 215 _$func PROC NEAR
 216         push    ebp
 217         push    ebx
 218         push    esi
 219         push    edi
 220 EOF
 221         push(@out,$tmp);
 222         $stack=20;
 223         }
 224
 225 sub main'function_begin_B
 226         {
 227         local($func,$extra)=@_;
 228
 229         local($tmp)=<<"EOF";
 230 _TEXT   SEGMENT
 231 PUBLIC  _$func
 232 $extra
 233 _$func PROC NEAR
 234 EOF
 235         push(@out,$tmp);
 236         $stack=4;
 237         }
 238
 239 sub main'function_end
 240         {
 241         local($func)=@_;
 242
 243         local($tmp)=<<"EOF";
 244         pop     edi
 245         pop     esi
 246         pop     ebx
 247         pop     ebp
 248         ret
 249 _$func ENDP
 250 _TEXT   ENDS
 251 EOF
 252         push(@out,$tmp);
 253         $stack=0;
 254         %label=();
 255         }
 256
 257 sub main'function_end_B
 258         {
 259         local($func)=@_;
 260
 261         local($tmp)=<<"EOF";
 262 _$func ENDP
 263 _TEXT   ENDS
 264 EOF
 265         push(@out,$tmp);
 266         $stack=0;
 267         %label=();
 268         }
 269
 270 sub main'function_end_A
 271         {
 272         local($func)=@_;
 273
 274         local($tmp)=<<"EOF";
 275         pop     edi
 276         pop     esi
 277         pop     ebx
 278         pop     ebp
 279         ret
 280 EOF
 281         push(@out,$tmp);
 282         }
 283
 284 sub main'file_end
 285         {
 286         push(@out,"END\n");
 287         }
 288
 289 sub main'wparam
 290         {
 291         local($num)=@_;
 292
 293         return(&main'DWP($stack+$num*4,"esp","",0));
 294         }
 295
 296 sub main'swtmp
 297         {
 298         return(&main'DWP($_[0]*4,"esp","",0));
 299         }
 300
 301 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 302 #sub main'wtmp
 303 #       {
 304 #       local($num)=@_;
 305 #
 306 #       return(&main'DWP(-(($num+1)*4),"esp","",0));
 307 #       }
 308
 309 sub main'comment
 310         {
 311         foreach (@_)
 312                 {
 313                 push(@out,"\t; $_\n");
 314                 }
 315         }
 316
 317 sub main'label
 318         {
 319         if (!defined($label{$_[0]}))
 320                 {
 321                 $label{$_[0]}="\$${label}${_[0]}";
 322                 $label++;
 323                 }
 324         return($label{$_[0]});
 325         }
 326
 327 sub main'set_label
 328         {
 329         if (!defined($label{$_[0]}))
 330                 {
 331                 $label{$_[0]}="${label}${_[0]}";
 332                 $label++;
 333                 }
 334         push(@out,"$label{$_[0]}:\n");
 335         }
 336
 337 sub main'data_word
 338         {
 339         push(@out,"\tDD\t$_[0]\n");
 340         }
 341
 342 sub out1p
 343         {
 344         local($name,$p1)=@_;
 345         local($l,$t);
 346
 347         push(@out,"\t$name\t ".&conv($p1)."\n");
 348         }