crypto/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 ($reg2 ne "")
  87                 {
  88                 if($idx ne "")
  89                     { $ret.="($reg1,$reg2,$idx)"; }
  90                 else
  91                     { $ret.="($reg1,$reg2)"; }
  92                 }
  93         else
  94                 { $ret.="($reg1)" }
  95         return($ret);
  96         }
  97
  98 sub main'BP
  99         {
 100         return(&main'DWP(@_));
 101         }
 102
 103 #sub main'BP
 104 #       {
 105 #       local($addr,$reg1,$reg2,$idx)=@_;
 106 #
 107 #       $ret="";
 108 #
 109 #       $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
 110 #       $reg1="$regs{$reg1}" if defined($regs{$reg1});
 111 #       $reg2="$regs{$reg2}" if defined($regs{$reg2});
 112 #       $ret.=$addr if ($addr ne "") && ($addr ne 0);
 113 #       if ($reg2 ne "")
 114 #               { $ret.="($reg1,$reg2,$idx)"; }
 115 #       else
 116 #               { $ret.="($reg1)" }
 117 #       return($ret);
 118 #       }
 119
 120 sub main'mov    { &out2("movl",@_); }
 121 sub main'movb   { &out2("movb",@_); }
 122 sub main'and    { &out2("andl",@_); }
 123 sub main'or     { &out2("orl",@_); }
 124 sub main'shl    { &out2("sall",@_); }
 125 sub main'shr    { &out2("shrl",@_); }
 126 sub main'xor    { &out2("xorl",@_); }
 127 sub main'xorb   { &out2("xorb",@_); }
 128 sub main'add    { &out2("addl",@_); }
 129 sub main'adc    { &out2("adcl",@_); }
 130 sub main'sub    { &out2("subl",@_); }
 131 sub main'rotl   { &out2("roll",@_); }
 132 sub main'rotr   { &out2("rorl",@_); }
 133 sub main'exch   { &out2("xchg",@_); }
 134 sub main'cmp    { &out2("cmpl",@_); }
 135 sub main'lea    { &out2("leal",@_); }
 136 sub main'mul    { &out1("mull",@_); }
 137 sub main'div    { &out1("divl",@_); }
 138 sub main'jmp    { &out1("jmp",@_); }
 139 sub main'jmp_ptr { &out1p("jmp",@_); }
 140 sub main'je     { &out1("je",@_); }
 141 sub main'jle    { &out1("jle",@_); }
 142 sub main'jne    { &out1("jne",@_); }
 143 sub main'jnz    { &out1("jnz",@_); }
 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'jno    { &out1("jno",@_); }
 151 sub main'dec    { &out1("decl",@_); }
 152 sub main'inc    { &out1("incl",@_); }
 153 sub main'push   { &out1("pushl",@_); $stack+=4; }
 154 sub main'pop    { &out1("popl",@_); $stack-=4; }
 155 sub main'not    { &out1("notl",@_); }
 156 sub main'call   { &out1("call",$under.$_[0]); }
 157 sub main'ret    { &out0("ret"); }
 158 sub main'nop    { &out0("nop"); }
 159
 160 # The bswapl instruction is new for the 486. Emulate if i386.
 161 sub main'bswap
 162         {
 163         if ($main'i386)
 164                 {
 165                 &main'comment("bswapl @_");
 166                 &main'exch(main'HB(@_),main'LB(@_));
 167                 &main'rotr(@_,16);
 168                 &main'exch(main'HB(@_),main'LB(@_));
 169                 }
 170         else
 171                 {
 172                 &out1("bswapl",@_);
 173                 }
 174         }
 175
 176 sub out2
 177         {
 178         local($name,$p1,$p2)=@_;
 179         local($l,$ll,$t);
 180         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 181                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 182                                 "shll",0xD1E0,"shrl",0xD1E8,
 183                                 "sarl",0xD1F8);
 184
 185         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 186                 {
 187                 $op=$special{$name}|$reg_val{$p1};
 188                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 189                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 190                 push(@out,$tmp1);
 191                 push(@out,$tmp2);
 192
 193                 $p2=&conv($p2);
 194                 $p1=&conv($p1);
 195                 &main'comment("$name $p2 $p1");
 196                 return;
 197                 }
 198
 199         push(@out,"\t$name\t");
 200         $t=&conv($p2).",";
 201         $l=length($t);
 202         push(@out,$t);
 203         $ll=4-($l+9)/8;
 204         $tmp1=sprintf("\t" x $ll);
 205         push(@out,$tmp1);
 206         push(@out,&conv($p1)."\n");
 207         }
 208
 209 sub out1
 210         {
 211         local($name,$p1)=@_;
 212         local($l,$t);
 213         local(%special)=("bswapl",0x0FC8);
 214
 215         if ((defined($special{$name})) && defined($regs{$p1}))
 216                 {
 217                 $op=$special{$name}|$reg_val{$p1};
 218                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 219                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 220                 push(@out,$tmp1);
 221                 push(@out,$tmp2);
 222
 223                 $p2=&conv($p2);
 224                 $p1=&conv($p1);
 225                 &main'comment("$name $p2 $p1");
 226                 return;
 227                 }
 228
 229         push(@out,"\t$name\t".&conv($p1)."\n");
 230         }
 231
 232 sub out1p
 233         {
 234         local($name,$p1)=@_;
 235         local($l,$t);
 236
 237         push(@out,"\t$name\t*".&conv($p1)."\n");
 238         }
 239
 240 sub out0
 241         {
 242         push(@out,"\t$_[0]\n");
 243         }
 244
 245 sub conv
 246         {
 247         local($p)=@_;
 248
 249 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 250
 251         $p=$regs{$p} if (defined($regs{$p}));
 252
 253         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 254         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 255         return $p;
 256         }
 257
 258 sub main'file
 259         {
 260         local($file)=@_;
 261
 262         local($tmp)=<<"EOF";
 263         .file   "$file.s"
 264         .version        "01.01"
 265 gcc2_compiled.:
 266 EOF
 267         push(@out,$tmp);
 268         }
 269
 270 sub main'function_begin
 271         {
 272         local($func)=@_;
 273
 274         &main'external_label($func);
 275         $func=$under.$func;
 276
 277         local($tmp)=<<"EOF";
 278 .text
 279         .align $align
 280 .globl $func
 281 EOF
 282         push(@out,$tmp);
 283         if ($main'cpp)
 284                 { $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
 285         else    { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
 286         push(@out,"$func:\n");
 287         $tmp=<<"EOF";
 288         pushl   %ebp
 289         pushl   %ebx
 290         pushl   %esi
 291         pushl   %edi
 292
 293 EOF
 294         push(@out,$tmp);
 295         $stack=20;
 296         }
 297
 298 sub main'function_begin_B
 299         {
 300         local($func,$extra)=@_;
 301
 302         &main'external_label($func);
 303         $func=$under.$func;
 304
 305         local($tmp)=<<"EOF";
 306 .text
 307         .align $align
 308 .globl $func
 309 EOF
 310         push(@out,$tmp);
 311         if ($main'cpp)
 312                 { push(@out,"\tTYPE($func,\@function)\n"); }
 313         else    { push(@out,"\t.type    $func,\@function\n"); }
 314         push(@out,"$func:\n");
 315         $stack=4;
 316         }
 317
 318 sub main'function_end
 319         {
 320         local($func)=@_;
 321
 322         $func=$under.$func;
 323
 324         local($tmp)=<<"EOF";
 325         popl    %edi
 326         popl    %esi
 327         popl    %ebx
 328         popl    %ebp
 329         ret
 330 .${func}_end:
 331 EOF
 332         push(@out,$tmp);
 333         if ($main'cpp)
 334                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 335         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 336         push(@out,".ident       \"$func\"\n");
 337         $stack=0;
 338         %label=();
 339         }
 340
 341 sub main'function_end_A
 342         {
 343         local($func)=@_;
 344
 345         local($tmp)=<<"EOF";
 346         popl    %edi
 347         popl    %esi
 348         popl    %ebx
 349         popl    %ebp
 350         ret
 351 EOF
 352         push(@out,$tmp);
 353         }
 354
 355 sub main'function_end_B
 356         {
 357         local($func)=@_;
 358
 359         $func=$under.$func;
 360
 361         push(@out,".${func}_end:\n");
 362         if ($main'cpp)
 363                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 364         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 365         push(@out,".ident       \"desasm.pl\"\n");
 366         $stack=0;
 367         %label=();
 368         }
 369
 370 sub main'wparam
 371         {
 372         local($num)=@_;
 373
 374         return(&main'DWP($stack+$num*4,"esp","",0));
 375         }
 376
 377 sub main'stack_push
 378         {
 379         local($num)=@_;
 380         $stack+=$num*4;
 381         &main'sub("esp",$num*4);
 382         }
 383
 384 sub main'stack_pop
 385         {
 386         local($num)=@_;
 387         $stack-=$num*4;
 388         &main'add("esp",$num*4);
 389         }
 390
 391 sub main'swtmp
 392         {
 393         return(&main'DWP($_[0]*4,"esp","",0));
 394         }
 395
 396 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 397 #sub main'wtmp
 398 #       {
 399 #       local($num)=@_;
 400 #
 401 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 402 #       }
 403
 404 sub main'comment
 405         {
 406         foreach (@_)
 407                 {
 408                 if (/^\s*$/)
 409                         { push(@out,"\n"); }
 410                 else
 411                         { push(@out,"\t$com_start $_ $com_end\n"); }
 412                 }
 413         }
 414
 415 sub main'label
 416         {
 417         if (!defined($label{$_[0]}))
 418                 {
 419                 $label{$_[0]}=".${label}${_[0]}";
 420                 $label++;
 421                 }
 422         return($label{$_[0]});
 423         }
 424
 425 sub main'set_label
 426         {
 427         if (!defined($label{$_[0]}))
 428                 {
 429                 $label{$_[0]}=".${label}${_[0]}";
 430                 $label++;
 431                 }
 432         push(@out,".align $align\n") if ($_[1] != 0);
 433         push(@out,"$label{$_[0]}:\n");
 434         }
 435
 436 sub main'file_end
 437         {
 438         }
 439
 440 sub main'data_word
 441         {
 442         push(@out,"\t.long $_[0]\n");
 443         }