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         if ($addr =~ /^.+\-.+$/) { $addr="($addr)"; }
  96
  97         $reg1="$regs{$reg1}" if defined($regs{$reg1});
  98         $reg2="$regs{$reg2}" if defined($regs{$reg2});
  99         if (($addr ne "") && ($addr ne 0))
 100                 {
 101                 if ($addr !~ /^-/)
 102                         { $ret.=$addr; }
 103                 else    { $post=$addr; }
 104                 }
 105         if ($reg2 ne "")
 106                 {
 107                 $t="";
 108                 $t="*$idx" if ($idx != 0);
 109                 $reg1="+".$reg1 if ("$reg1$post" ne "");
 110                 $ret.="[$reg2$t$reg1$post]";
 111                 }
 112         else
 113                 {
 114                 $ret.="[$reg1$post]"
 115                 }
 116         $ret =~ s/\[\]//;       # in case $addr was the only argument
 117         return($ret);
 118         }
 119
 120 sub main'mov    { &out2("mov",@_); }
 121 sub main'movb   { &out2("mov",@_); }
 122 sub main'and    { &out2("and",@_); }
 123 sub main'or     { &out2("or",@_); }
 124 sub main'shl    { &out2("shl",@_); }
 125 sub main'shr    { &out2("shr",@_); }
 126 sub main'xor    { &out2("xor",@_); }
 127 sub main'xorb   { &out2("xor",@_); }
 128 sub main'add    { &out2("add",@_); }
 129 sub main'adc    { &out2("adc",@_); }
 130 sub main'sub    { &out2("sub",@_); }
 131 sub main'rotl   { &out2("rol",@_); }
 132 sub main'rotr   { &out2("ror",@_); }
 133 sub main'exch   { &out2("xchg",@_); }
 134 sub main'cmp    { &out2("cmp",@_); }
 135 sub main'lea    { &out2("lea",@_); }
 136 sub main'mul    { &out1("mul",@_); }
 137 sub main'div    { &out1("div",@_); }
 138 sub main'dec    { &out1("dec",@_); }
 139 sub main'inc    { &out1("inc",@_); }
 140 sub main'jmp    { &out1("jmp",@_); }
 141 sub main'jmp_ptr { &out1p("jmp",@_); }
 142 sub main'je     { &out1("je",@_); }
 143 sub main'jle    { &out1("jle",@_); }
 144 sub main'jz     { &out1("jz",@_); }
 145 sub main'jge    { &out1("jge",@_); }
 146 sub main'jl     { &out1("jl",@_); }
 147 sub main'jb     { &out1("jb",@_); }
 148 sub main'jc     { &out1("jc",@_); }
 149 sub main'jnc    { &out1("jnc",@_); }
 150 sub main'jnz    { &out1("jnz",@_); }
 151 sub main'jne    { &out1("jne",@_); }
 152 sub main'jno    { &out1("jno",@_); }
 153 sub main'push   { &out1("push",@_); $stack+=4; }
 154 sub main'pop    { &out1("pop",@_); $stack-=4; }
 155 sub main'bswap  { &out1("bswap",@_); &using486(); }
 156 sub main'not    { &out1("not",@_); }
 157 sub main'call   { &out1("call",($_[0]=~/^\$L/?'':'_').$_[0]); }
 158 sub main'ret    { &out0("ret"); }
 159 sub main'nop    { &out0("nop"); }
 160
 161 sub out2
 162         {
 163         local($name,$p1,$p2)=@_;
 164         local($l,$t);
 165
 166         push(@out,"\t$name\t");
 167         $t=&conv($p1).",";
 168         $l=length($t);
 169         push(@out,$t);
 170         $l=4-($l+9)/8;
 171         push(@out,"\t" x $l);
 172         push(@out,&conv($p2));
 173         push(@out,"\n");
 174         }
 175
 176 sub out0
 177         {
 178         local($name)=@_;
 179
 180         push(@out,"\t$name\n");
 181         }
 182
 183 sub out1
 184         {
 185         local($name,$p1)=@_;
 186         local($l,$t);
 187
 188         push(@out,"\t$name\t".&conv($p1)."\n");
 189         }
 190
 191 sub conv
 192         {
 193         local($p)=@_;
 194
 195         $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 196         return $p;
 197         }
 198
 199 sub using486
 200         {
 201         return if $using486;
 202         $using486++;
 203         grep(s/\.386/\.486/,@out);
 204         }
 205
 206 sub main'file
 207         {
 208         local($file)=@_;
 209
 210         local($tmp)=<<"EOF";
 211         TITLE   $file.asm
 212         .386
 213 .model FLAT
 214 EOF
 215         push(@out,$tmp);
 216         }
 217
 218 sub main'function_begin
 219         {
 220         local($func,$extra)=@_;
 221
 222         push(@labels,$func);
 223
 224         local($tmp)=<<"EOF";
 225 _TEXT   SEGMENT
 226 PUBLIC  _$func
 227 $extra
 228 _$func PROC NEAR
 229         push    ebp
 230         push    ebx
 231         push    esi
 232         push    edi
 233 EOF
 234         push(@out,$tmp);
 235         $stack=20;
 236         }
 237
 238 sub main'function_begin_B
 239         {
 240         local($func,$extra)=@_;
 241
 242         local($tmp)=<<"EOF";
 243 _TEXT   SEGMENT
 244 PUBLIC  _$func
 245 $extra
 246 _$func PROC NEAR
 247 EOF
 248         push(@out,$tmp);
 249         $stack=4;
 250         }
 251
 252 sub main'function_end
 253         {
 254         local($func)=@_;
 255
 256         local($tmp)=<<"EOF";
 257         pop     edi
 258         pop     esi
 259         pop     ebx
 260         pop     ebp
 261         ret
 262 _$func ENDP
 263 _TEXT   ENDS
 264 EOF
 265         push(@out,$tmp);
 266         $stack=0;
 267         %label=();
 268         }
 269
 270 sub main'function_end_B
 271         {
 272         local($func)=@_;
 273
 274         local($tmp)=<<"EOF";
 275 _$func ENDP
 276 _TEXT   ENDS
 277 EOF
 278         push(@out,$tmp);
 279         $stack=0;
 280         %label=();
 281         }
 282
 283 sub main'function_end_A
 284         {
 285         local($func)=@_;
 286
 287         local($tmp)=<<"EOF";
 288         pop     edi
 289         pop     esi
 290         pop     ebx
 291         pop     ebp
 292         ret
 293 EOF
 294         push(@out,$tmp);
 295         }
 296
 297 sub main'file_end
 298         {
 299         push(@out,"END\n");
 300         }
 301
 302 sub main'wparam
 303         {
 304         local($num)=@_;
 305
 306         return(&main'DWP($stack+$num*4,"esp","",0));
 307         }
 308
 309 sub main'swtmp
 310         {
 311         return(&main'DWP($_[0]*4,"esp","",0));
 312         }
 313
 314 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 315 #sub main'wtmp
 316 #       {
 317 #       local($num)=@_;
 318 #
 319 #       return(&main'DWP(-(($num+1)*4),"esp","",0));
 320 #       }
 321
 322 sub main'comment
 323         {
 324         foreach (@_)
 325                 {
 326                 push(@out,"\t; $_\n");
 327                 }
 328         }
 329
 330 sub main'label
 331         {
 332         if (!defined($label{$_[0]}))
 333                 {
 334                 $label{$_[0]}="\$${label}${_[0]}";
 335                 $label++;
 336                 }
 337         return($label{$_[0]});
 338         }
 339
 340 sub main'set_label
 341         {
 342         if (!defined($label{$_[0]}))
 343                 {
 344                 $label{$_[0]}="\$${label}${_[0]}";
 345                 $label++;
 346                 }
 347         if((defined $_[2]) && ($_[2] == 1))
 348                 {
 349                 push(@out,"$label{$_[0]}::\n");
 350                 }
 351         else
 352                 {
 353                 push(@out,"$label{$_[0]}:\n");
 354                 }
 355         }
 356
 357 sub main'data_word
 358         {
 359         push(@out,"\tDD\t$_[0]\n");
 360         }
 361
 362 sub out1p
 363         {
 364         local($name,$p1)=@_;
 365         local($l,$t);
 366
 367         push(@out,"\t$name\t ".&conv($p1)."\n");
 368         }
 369
 370 sub main'picmeup
 371         {
 372         local($dst,$sym)=@_;
 373         &main'lea($dst,&main'DWP($sym));
 374         }
 375
 376 sub main'blindpop { &out1("pop",@_); }