freeswan/libdes/asm/perlasm/x86unix.pl

   1 #!/usr/local/bin/perl
   2
   3 package x86unix;
   4
   5 $label="L000";
   6
   7 $align=($main'aout)?"4":"16";
   8 $under=($main'aout)?"_":"";
   9 $com_start=($main'sol)?"/":"#";
  10
  11 sub main'asm_init_output { @out=(); }
  12 sub main'asm_get_output { return(@out); }
  13 sub main'get_labels { return(@labels); }
  14 sub main'external_label { push(@labels,@_); }
  15
  16 if ($main'cpp)
  17         {
  18         $align="ALIGN";
  19         $under="";
  20         $com_start='/*';
  21         $com_end='*/';
  22         }
  23
  24 %lb=(   'eax',  '%al',
  25         'ebx',  '%bl',
  26         'ecx',  '%cl',
  27         'edx',  '%dl',
  28         'ax',   '%al',
  29         'bx',   '%bl',
  30         'cx',   '%cl',
  31         'dx',   '%dl',
  32         );
  33
  34 %hb=(   'eax',  '%ah',
  35         'ebx',  '%bh',
  36         'ecx',  '%ch',
  37         'edx',  '%dh',
  38         'ax',   '%ah',
  39         'bx',   '%bh',
  40         'cx',   '%ch',
  41         'dx',   '%dh',
  42         );
  43
  44 %regs=( 'eax',  '%eax',
  45         'ebx',  '%ebx',
  46         'ecx',  '%ecx',
  47         'edx',  '%edx',
  48         'esi',  '%esi',
  49         'edi',  '%edi',
  50         'ebp',  '%ebp',
  51         'esp',  '%esp',
  52         );
  53
  54 %reg_val=(
  55         'eax',  0x00,
  56         'ebx',  0x03,
  57         'ecx',  0x01,
  58         'edx',  0x02,
  59         'esi',  0x06,
  60         'edi',  0x07,
  61         'ebp',  0x05,
  62         'esp',  0x04,
  63         );
  64
  65 sub main'LB
  66         {
  67         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  68         return($lb{$_[0]});
  69         }
  70
  71 sub main'HB
  72         {
  73         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  74         return($hb{$_[0]});
  75         }
  76
  77 sub main'DWP
  78         {
  79         local($addr,$reg1,$reg2,$idx)=@_;
  80
  81         $ret="";
  82         $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
  83         $reg1="$regs{$reg1}" if defined($regs{$reg1});
  84         $reg2="$regs{$reg2}" if defined($regs{$reg2});
  85         $ret.=$addr if ($addr ne "") && ($addr ne 0);
  86         if ($reg2 ne "")
  87                 { $ret.="($reg1,$reg2,$idx)"; }
  88         else
  89                 { $ret.="($reg1)" }
  90         return($ret);
  91         }
  92
  93 sub main'BP
  94         {
  95         return(&main'DWP(@_));
  96         }
  97
  98 #sub main'BP
  99 #       {
 100 #       local($addr,$reg1,$reg2,$idx)=@_;
 101 #
 102 #       $ret="";
 103 #
 104 #       $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
 105 #       $reg1="$regs{$reg1}" if defined($regs{$reg1});
 106 #       $reg2="$regs{$reg2}" if defined($regs{$reg2});
 107 #       $ret.=$addr if ($addr ne "") && ($addr ne 0);
 108 #       if ($reg2 ne "")
 109 #               { $ret.="($reg1,$reg2,$idx)"; }
 110 #       else
 111 #               { $ret.="($reg1)" }
 112 #       return($ret);
 113 #       }
 114
 115 sub main'mov    { &out2("movl",@_); }
 116 sub main'movb   { &out2("movb",@_); }
 117 sub main'and    { &out2("andl",@_); }
 118 sub main'or     { &out2("orl",@_); }
 119 sub main'shl    { &out2("sall",@_); }
 120 sub main'shr    { &out2("shrl",@_); }
 121 sub main'xor    { &out2("xorl",@_); }
 122 sub main'xorb   { &out2("xorb",@_); }
 123 sub main'add    { &out2("addl",@_); }
 124 sub main'adc    { &out2("adcl",@_); }
 125 sub main'sub    { &out2("subl",@_); }
 126 sub main'rotl   { &out2("roll",@_); }
 127 sub main'rotr   { &out2("rorl",@_); }
 128 sub main'exch   { &out2("xchg",@_); }
 129 sub main'cmp    { &out2("cmpl",@_); }
 130 sub main'lea    { &out2("leal",@_); }
 131 sub main'mul    { &out1("mull",@_); }
 132 sub main'div    { &out1("divl",@_); }
 133 sub main'jmp    { &out1("jmp",@_); }
 134 sub main'jmp_ptr { &out1p("jmp",@_); }
 135 sub main'je     { &out1("je",@_); }
 136 sub main'jle    { &out1("jle",@_); }
 137 sub main'jne    { &out1("jne",@_); }
 138 sub main'jnz    { &out1("jnz",@_); }
 139 sub main'jz     { &out1("jz",@_); }
 140 sub main'jge    { &out1("jge",@_); }
 141 sub main'jl     { &out1("jl",@_); }
 142 sub main'jb     { &out1("jb",@_); }
 143 sub main'dec    { &out1("decl",@_); }
 144 sub main'inc    { &out1("incl",@_); }
 145 sub main'push   { &out1("pushl",@_); $stack+=4; }
 146 sub main'pop    { &out1("popl",@_); $stack-=4; }
 147 sub main'bswap  { &out1("bswapl",@_); }
 148 sub main'not    { &out1("notl",@_); }
 149 sub main'call   { &out1("call",$under.$_[0]); }
 150 sub main'ret    { &out0("ret"); }
 151 sub main'nop    { &out0("nop"); }
 152
 153 sub out2
 154         {
 155         local($name,$p1,$p2)=@_;
 156         local($l,$ll,$t);
 157         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 158                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 159                                 "shll",0xD1E0,"shrl",0xD1E8,
 160                                 "sarl",0xD1F8);
 161
 162         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 163                 {
 164                 $op=$special{$name}|$reg_val{$p1};
 165                 $tmp1=sprintf ".byte %d\n",($op>>8)&0xff;
 166                 $tmp2=sprintf ".byte %d\t",$op     &0xff;
 167                 push(@out,$tmp1);
 168                 push(@out,$tmp2);
 169
 170                 $p2=&conv($p2);
 171                 $p1=&conv($p1);
 172                 &main'comment("$name $p2 $p1");
 173                 return;
 174                 }
 175
 176         push(@out,"\t$name\t");
 177         $t=&conv($p2).",";
 178         $l=length($t);
 179         push(@out,$t);
 180         $ll=4-($l+9)/8;
 181         $tmp1=sprintf "\t" x $ll;
 182         push(@out,$tmp1);
 183         push(@out,&conv($p1)."\n");
 184         }
 185
 186 sub out1
 187         {
 188         local($name,$p1)=@_;
 189         local($l,$t);
 190
 191         push(@out,"\t$name\t".&conv($p1)."\n");
 192         }
 193
 194 sub out1p
 195         {
 196         local($name,$p1)=@_;
 197         local($l,$t);
 198
 199         push(@out,"\t$name\t*".&conv($p1)."\n");
 200         }
 201
 202 sub out0
 203         {
 204         push(@out,"\t$_[0]\n");
 205         }
 206
 207 sub conv
 208         {
 209         local($p)=@_;
 210
 211 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 212
 213         $p=$regs{$p} if (defined($regs{$p}));
 214
 215         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 216         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 217         return $p;
 218         }
 219
 220 sub main'file
 221         {
 222         local($file)=@_;
 223
 224         local($tmp)=<<"EOF";
 225         .file   "$file.s"
 226         .version        "01.01"
 227 gcc2_compiled.:
 228 EOF
 229         push(@out,$tmp);
 230         }
 231
 232 sub main'function_begin
 233         {
 234         local($func)=@_;
 235
 236         $func=$under.$func;
 237
 238         local($tmp)=<<"EOF";
 239 .text
 240         .align $align
 241 .globl $func
 242 EOF
 243         push(@out,$tmp);
 244         if ($main'cpp)
 245                 { $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
 246         else    { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
 247         push(@out,"$func:\n");
 248         $tmp=<<"EOF";
 249         pushl   %ebp
 250         pushl   %ebx
 251         pushl   %esi
 252         pushl   %edi
 253
 254 EOF
 255         push(@out,$tmp);
 256         $stack=20;
 257         }
 258
 259 sub main'function_begin_B
 260         {
 261         local($func,$extra)=@_;
 262
 263         $func=$under.$func;
 264
 265         local($tmp)=<<"EOF";
 266 .text
 267         .align $align
 268 .globl $func
 269 EOF
 270         push(@out,$tmp);
 271         if ($main'cpp)
 272                 { push(@out,"\tTYPE($func,\@function)\n"); }
 273         else    { push(@out,"\t.type    $func,\@function\n"); }
 274         push(@out,"$func:\n");
 275         $stack=4;
 276         }
 277
 278 sub main'function_end
 279         {
 280         local($func)=@_;
 281
 282         $func=$under.$func;
 283
 284         local($tmp)=<<"EOF";
 285         popl    %edi
 286         popl    %esi
 287         popl    %ebx
 288         popl    %ebp
 289         ret
 290 .${func}_end:
 291 EOF
 292         push(@out,$tmp);
 293         if ($main'cpp)
 294                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 295         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 296         push(@out,".ident       \"$func\"\n");
 297         $stack=0;
 298         %label=();
 299         }
 300
 301 sub main'function_end_A
 302         {
 303         local($func)=@_;
 304
 305         local($tmp)=<<"EOF";
 306         popl    %edi
 307         popl    %esi
 308         popl    %ebx
 309         popl    %ebp
 310         ret
 311 EOF
 312         push(@out,$tmp);
 313         }
 314
 315 sub main'function_end_B
 316         {
 317         local($func)=@_;
 318
 319         $func=$under.$func;
 320
 321         push(@out,".${func}_end:\n");
 322         if ($main'cpp)
 323                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 324         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 325         push(@out,".ident       \"desasm.pl\"\n");
 326         $stack=0;
 327         %label=();
 328         }
 329
 330 sub main'wparam
 331         {
 332         local($num)=@_;
 333
 334         return(&main'DWP($stack+$num*4,"esp","",0));
 335         }
 336
 337 sub main'stack_push
 338         {
 339         local($num)=@_;
 340         $stack+=$num*4;
 341         &main'sub("esp",$num*4);
 342         }
 343
 344 sub main'stack_pop
 345         {
 346         local($num)=@_;
 347         $stack-=$num*4;
 348         &main'add("esp",$num*4);
 349         }
 350
 351 sub main'swtmp
 352         {
 353         return(&main'DWP($_[0]*4,"esp","",0));
 354         }
 355
 356 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 357 #sub main'wtmp
 358 #       {
 359 #       local($num)=@_;
 360 #
 361 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 362 #       }
 363
 364 sub main'comment
 365         {
 366         foreach (@_)
 367                 {
 368                 if (/^\s*$/)
 369                         { push(@out,"\n"); }
 370                 else
 371                         { push(@out,"\t$com_start $_ $com_end\n"); }
 372                 }
 373         }
 374
 375 sub main'label
 376         {
 377         if (!defined($label{$_[0]}))
 378                 {
 379                 $label{$_[0]}=".${label}${_[0]}";
 380                 $label++;
 381                 }
 382         return($label{$_[0]});
 383         }
 384
 385 sub main'set_label
 386         {
 387         if (!defined($label{$_[0]}))
 388                 {
 389                 $label{$_[0]}=".${label}${_[0]}";
 390                 $label++;
 391                 }
 392         push(@out,".align $align\n") if ($_[1] != 0);
 393         push(@out,"$label{$_[0]}:\n");
 394         }
 395
 396 sub main'file_end
 397         {
 398         }
 399
 400 sub main'data_word
 401         {
 402         push(@out,"\t.long $_[0]\n");
 403         }