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{$_[0]});
  42         }
  43
  44 sub main'BP
  45         {
  46         &get_mem("BYTE",@_);
  47         }
  48
  49 sub main'DWP
  50         {
  51         &get_mem("DWORD",@_);
  52         }
  53
  54 sub main'BC
  55         {
  56         return @_;
  57         }
  58
  59 sub main'DWC
  60         {
  61         return @_;
  62         }
  63
  64 sub main'stack_push
  65         {
  66         local($num)=@_;
  67         $stack+=$num*4;
  68         &main'sub("esp",$num*4);
  69         }
  70
  71 sub main'stack_pop
  72         {
  73         local($num)=@_;
  74         $stack-=$num*4;
  75         &main'add("esp",$num*4);
  76         }
  77
  78 sub get_mem
  79         {
  80         local($size,$addr,$reg1,$reg2,$idx)=@_;
  81         local($t,$post);
  82         local($ret)="$size PTR ";
  83
  84         $addr =~ s/^\s+//;
  85         if ($addr =~ /^(.+)\+(.+)$/)
  86                 {
  87                 $reg2=&conv($1);
  88                 $addr="_$2";
  89                 }
  90         elsif ($addr =~ /^[_a-zA-Z]/)
  91                 {
  92                 $addr="_$addr";
  93                 }
  94
  95         $reg1="$regs{$reg1}" if defined($regs{$reg1});
  96         $reg2="$regs{$reg2}" if defined($regs{$reg2});
  97         if (($addr ne "") && ($addr ne 0))
  98                 {
  99                 if ($addr !~ /^-/)
 100                         { $ret.=$addr; }
 101                 else    { $post=$addr; }
 102                 }
 103         if ($reg2 ne "")
 104                 {
 105                 $t="";
 106                 $t="*$idx" if ($idx != 0);
 107                 $reg1="+".$reg1 if ("$reg1$post" ne "");
 108                 $ret.="[$reg2$t$reg1$post]";
 109                 }
 110         else
 111                 {
 112                 $ret.="[$reg1$post]"
 113                 }
 114         return($ret);
 115         }
 116
 117 sub main'mov    { &out2("mov",@_); }
 118 sub main'movb   { &out2("mov",@_); }
 119 sub main'and    { &out2("and",@_); }
 120 sub main'or     { &out2("or",@_); }
 121 sub main'shl    { &out2("shl",@_); }
 122 sub main'shr    { &out2("shr",@_); }
 123 sub main'xor    { &out2("xor",@_); }
 124 sub main'xorb   { &out2("xor",@_); }
 125 sub main'add    { &out2("add",@_); }
 126 sub main'adc    { &out2("adc",@_); }
 127 sub main'sub    { &out2("sub",@_); }
 128 sub main'rotl   { &out2("rol",@_); }
 129 sub main'rotr   { &out2("ror",@_); }
 130 sub main'exch   { &out2("xchg",@_); }
 131 sub main'cmp    { &out2("cmp",@_); }
 132 sub main'lea    { &out2("lea",@_); }
 133 sub main'mul    { &out1("mul",@_); }
 134 sub main'div    { &out1("div",@_); }
 135 sub main'dec    { &out1("dec",@_); }
 136 sub main'inc    { &out1("inc",@_); }
 137 sub main'jmp    { &out1("jmp",@_); }
 138 sub main'jmp_ptr { &out1p("jmp",@_); }
 139 sub main'je     { &out1("je",@_); }
 140 sub main'jle    { &out1("jle",@_); }
 141 sub main'jz     { &out1("jz",@_); }
 142 sub main'jge    { &out1("jge",@_); }
 143 sub main'jl     { &out1("jl",@_); }
 144 sub main'jb     { &out1("jb",@_); }
 145 sub main'jc     { &out1("jc",@_); }
 146 sub main'jnc    { &out1("jnc",@_); }
 147 sub main'jnz    { &out1("jnz",@_); }
 148 sub main'jne    { &out1("jne",@_); }
 149 sub main'jno    { &out1("jno",@_); }
 150 sub main'push   { &out1("push",@_); $stack+=4; }
 151 sub main'pop    { &out1("pop",@_); $stack-=4; }
 152 sub main'bswap  { &out1("bswap",@_); &using486(); }
 153 sub main'not    { &out1("not",@_); }
 154 sub main'call   { &out1("call",'_'.$_[0]); }
 155 sub main'ret    { &out0("ret"); }
 156 sub main'nop    { &out0("nop"); }
 157
 158 sub out2
 159         {
 160         local($name,$p1,$p2)=@_;
 161         local($l,$t);
 162
 163         push(@out,"\t$name\t");
 164         $t=&conv($p1).",";
 165         $l=length($t);
 166         push(@out,$t);
 167         $l=4-($l+9)/8;
 168         push(@out,"\t" x $l);
 169         push(@out,&conv($p2));
 170         push(@out,"\n");
 171         }
 172
 173 sub out0
 174         {
 175         local($name)=@_;
 176
 177         push(@out,"\t$name\n");
 178         }
 179
 180 sub out1
 181         {
 182         local($name,$p1)=@_;
 183         local($l,$t);
 184
 185         push(@out,"\t$name\t".&conv($p1)."\n");
 186         }
 187
 188 sub conv
 189         {
 190         local($p)=@_;
 191
 192         $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 193         return $p;
 194         }
 195
 196 sub using486
 197         {
 198         return if $using486;
 199         $using486++;
 200         grep(s/\.386/\.486/,@out);
 201         }
 202
 203 sub main'file
 204         {
 205         local($file)=@_;
 206
 207         local($tmp)=<<"EOF";
 208         TITLE   $file.asm
 209         .386
 210 .model FLAT
 211 EOF
 212         push(@out,$tmp);
 213         }
 214
 215 sub main'function_begin
 216         {
 217         local($func,$extra)=@_;
 218
 219         push(@labels,$func);
 220
 221         local($tmp)=<<"EOF";
 222 _TEXT   SEGMENT
 223 PUBLIC  _$func
 224 $extra
 225 _$func PROC NEAR
 226         push    ebp
 227         push    ebx
 228         push    esi
 229         push    edi
 230 EOF
 231         push(@out,$tmp);
 232         $stack=20;
 233         }
 234
 235 sub main'function_begin_B
 236         {
 237         local($func,$extra)=@_;
 238
 239         local($tmp)=<<"EOF";
 240 _TEXT   SEGMENT
 241 PUBLIC  _$func
 242 $extra
 243 _$func PROC NEAR
 244 EOF
 245         push(@out,$tmp);
 246         $stack=4;
 247         }
 248
 249 sub main'function_end
 250         {
 251         local($func)=@_;
 252
 253         local($tmp)=<<"EOF";
 254         pop     edi
 255         pop     esi
 256         pop     ebx
 257         pop     ebp
 258         ret
 259 _$func ENDP
 260 _TEXT   ENDS
 261 EOF
 262         push(@out,$tmp);
 263         $stack=0;
 264         %label=();
 265         }
 266
 267 sub main'function_end_B
 268         {
 269         local($func)=@_;
 270
 271         local($tmp)=<<"EOF";
 272 _$func ENDP
 273 _TEXT   ENDS
 274 EOF
 275         push(@out,$tmp);
 276         $stack=0;
 277         %label=();
 278         }
 279
 280 sub main'function_end_A
 281         {
 282         local($func)=@_;
 283
 284         local($tmp)=<<"EOF";
 285         pop     edi
 286         pop     esi
 287         pop     ebx
 288         pop     ebp
 289         ret
 290 EOF
 291         push(@out,$tmp);
 292         }
 293
 294 sub main'file_end
 295         {
 296         push(@out,"END\n");
 297         }
 298
 299 sub main'wparam
 300         {
 301         local($num)=@_;
 302
 303         return(&main'DWP($stack+$num*4,"esp","",0));
 304         }
 305
 306 sub main'swtmp
 307         {
 308         return(&main'DWP($_[0]*4,"esp","",0));
 309         }
 310
 311 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 312 #sub main'wtmp
 313 #       {
 314 #       local($num)=@_;
 315 #
 316 #       return(&main'DWP(-(($num+1)*4),"esp","",0));
 317 #       }
 318
 319 sub main'comment
 320         {
 321         foreach (@_)
 322                 {
 323                 push(@out,"\t; $_\n");
 324                 }
 325         }
 326
 327 sub main'label
 328         {
 329         if (!defined($label{$_[0]}))
 330                 {
 331                 $label{$_[0]}="\$${label}${_[0]}";
 332                 $label++;
 333                 }
 334         return($label{$_[0]});
 335         }
 336
 337 sub main'set_label
 338         {
 339         if (!defined($label{$_[0]}))
 340                 {
 341                 $label{$_[0]}="${label}${_[0]}";
 342                 $label++;
 343                 }
 344         if((defined $_[2]) && ($_[2] == 1))
 345                 {
 346                 push(@out,"$label{$_[0]}::\n");
 347                 }
 348         else
 349                 {
 350                 push(@out,"$label{$_[0]}:\n");
 351                 }
 352         }
 353
 354 sub main'data_word
 355         {
 356         push(@out,"\tDD\t$_[0]\n");
 357         }
 358
 359 sub out1p
 360         {
 361         local($name,$p1)=@_;
 362         local($l,$t);
 363
 364         push(@out,"\t$name\t ".&conv($p1)."\n");
 365         }
 366
 367 sub main'blindpop { &out1("pop",@_); }