freeswan/libdes/asm/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'jnz    { &out1("jnz",@_); }
 136 sub main'jne    { &out1("jne",@_); }
 137 sub main'push   { &out1("push",@_); $stack+=4; }
 138 sub main'pop    { &out1("pop",@_); $stack-=4; }
 139 sub main'bswap  { &out1("bswap",@_); &using486(); }
 140 sub main'not    { &out1("not",@_); }
 141 sub main'call   { &out1("call",'_'.$_[0]); }
 142 sub main'ret    { &out0("ret"); }
 143 sub main'nop    { &out0("nop"); }
 144
 145 sub out2
 146         {
 147         local($name,$p1,$p2)=@_;
 148         local($l,$t);
 149
 150         push(@out,"\t$name\t");
 151         $t=&conv($p1).",";
 152         $l=length($t);
 153         push(@out,$t);
 154         $l=4-($l+9)/8;
 155         push(@out,"\t" x $l);
 156         push(@out,&conv($p2));
 157         push(@out,"\n");
 158         }
 159
 160 sub out0
 161         {
 162         local($name)=@_;
 163
 164         push(@out,"\t$name\n");
 165         }
 166
 167 sub out1
 168         {
 169         local($name,$p1)=@_;
 170         local($l,$t);
 171
 172         push(@out,"\t$name\t".&conv($p1)."\n");
 173         }
 174
 175 sub conv
 176         {
 177         local($p)=@_;
 178
 179         $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 180         return $p;
 181         }
 182
 183 sub using486
 184         {
 185         return if $using486;
 186         $using486++;
 187         grep(s/\.386/\.486/,@out);
 188         }
 189
 190 sub main'file
 191         {
 192         local($file)=@_;
 193
 194         local($tmp)=<<"EOF";
 195         TITLE   $file.asm
 196         .386
 197 .model FLAT
 198 EOF
 199         push(@out,$tmp);
 200         }
 201
 202 sub main'function_begin
 203         {
 204         local($func,$extra)=@_;
 205
 206         push(@labels,$func);
 207
 208         local($tmp)=<<"EOF";
 209 _TEXT   SEGMENT
 210 PUBLIC  _$func
 211 $extra
 212 _$func PROC NEAR
 213         push    ebp
 214         push    ebx
 215         push    esi
 216         push    edi
 217 EOF
 218         push(@out,$tmp);
 219         $stack=20;
 220         }
 221
 222 sub main'function_begin_B
 223         {
 224         local($func,$extra)=@_;
 225
 226         local($tmp)=<<"EOF";
 227 _TEXT   SEGMENT
 228 PUBLIC  _$func
 229 $extra
 230 _$func PROC NEAR
 231 EOF
 232         push(@out,$tmp);
 233         $stack=4;
 234         }
 235
 236 sub main'function_end
 237         {
 238         local($func)=@_;
 239
 240         local($tmp)=<<"EOF";
 241         pop     edi
 242         pop     esi
 243         pop     ebx
 244         pop     ebp
 245         ret
 246 _$func ENDP
 247 _TEXT   ENDS
 248 EOF
 249         push(@out,$tmp);
 250         $stack=0;
 251         %label=();
 252         }
 253
 254 sub main'function_end_B
 255         {
 256         local($func)=@_;
 257
 258         local($tmp)=<<"EOF";
 259 _$func ENDP
 260 _TEXT   ENDS
 261 EOF
 262         push(@out,$tmp);
 263         $stack=0;
 264         %label=();
 265         }
 266
 267 sub main'function_end_A
 268         {
 269         local($func)=@_;
 270
 271         local($tmp)=<<"EOF";
 272         pop     edi
 273         pop     esi
 274         pop     ebx
 275         pop     ebp
 276         ret
 277 EOF
 278         push(@out,$tmp);
 279         }
 280
 281 sub main'file_end
 282         {
 283         push(@out,"END\n");
 284         }
 285
 286 sub main'wparam
 287         {
 288         local($num)=@_;
 289
 290         return(&main'DWP($stack+$num*4,"esp","",0));
 291         }
 292
 293 sub main'swtmp
 294         {
 295         return(&main'DWP($_[0]*4,"esp","",0));
 296         }
 297
 298 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 299 #sub main'wtmp
 300 #       {
 301 #       local($num)=@_;
 302 #
 303 #       return(&main'DWP(-(($num+1)*4),"esp","",0));
 304 #       }
 305
 306 sub main'comment
 307         {
 308         foreach (@_)
 309                 {
 310                 push(@out,"\t; $_\n");
 311                 }
 312         }
 313
 314 sub main'label
 315         {
 316         if (!defined($label{$_[0]}))
 317                 {
 318                 $label{$_[0]}="\$${label}${_[0]}";
 319                 $label++;
 320                 }
 321         return($label{$_[0]});
 322         }
 323
 324 sub main'set_label
 325         {
 326         if (!defined($label{$_[0]}))
 327                 {
 328                 $label{$_[0]}="${label}${_[0]}";
 329                 $label++;
 330                 }
 331         push(@out,"$label{$_[0]}:\n");
 332         }
 333
 334 sub main'data_word
 335         {
 336         push(@out,"\tDD\t$_[0]\n");
 337         }
 338
 339 sub out1p
 340         {
 341         local($name,$p1)=@_;
 342         local($l,$t);
 343
 344         push(@out,"\t$name\t ".&conv($p1)."\n");
 345         }