crypto/perlasm/x86unix.pl

   1 #!/usr/local/bin/perl
   2
   3 package x86unix;
   4
   5 $label="L000";
   6 $const="";
   7 $constl=0;
   8
   9 $align=($main'aout)?"4":"16";
  10 $under=($main'aout)?"_":"";
  11 $com_start=($main'sol)?"/":"#";
  12
  13 sub main'asm_init_output { @out=(); }
  14 sub main'asm_get_output { return(@out); }
  15 sub main'get_labels { return(@labels); }
  16 sub main'external_label { push(@labels,@_); }
  17
  18 if ($main'cpp)
  19         {
  20         $align="ALIGN";
  21         $under="";
  22         $com_start='/*';
  23         $com_end='*/';
  24         }
  25
  26 %lb=(   'eax',  '%al',
  27         'ebx',  '%bl',
  28         'ecx',  '%cl',
  29         'edx',  '%dl',
  30         'ax',   '%al',
  31         'bx',   '%bl',
  32         'cx',   '%cl',
  33         'dx',   '%dl',
  34         );
  35
  36 %hb=(   'eax',  '%ah',
  37         'ebx',  '%bh',
  38         'ecx',  '%ch',
  39         'edx',  '%dh',
  40         'ax',   '%ah',
  41         'bx',   '%bh',
  42         'cx',   '%ch',
  43         'dx',   '%dh',
  44         );
  45
  46 %regs=( 'eax',  '%eax',
  47         'ebx',  '%ebx',
  48         'ecx',  '%ecx',
  49         'edx',  '%edx',
  50         'esi',  '%esi',
  51         'edi',  '%edi',
  52         'ebp',  '%ebp',
  53         'esp',  '%esp',
  54         );
  55
  56 %reg_val=(
  57         'eax',  0x00,
  58         'ebx',  0x03,
  59         'ecx',  0x01,
  60         'edx',  0x02,
  61         'esi',  0x06,
  62         'edi',  0x07,
  63         'ebp',  0x05,
  64         'esp',  0x04,
  65         );
  66
  67 sub main'LB
  68         {
  69         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  70         return($lb{$_[0]});
  71         }
  72
  73 sub main'HB
  74         {
  75         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  76         return($hb{$_[0]});
  77         }
  78
  79 sub main'DWP
  80         {
  81         local($addr,$reg1,$reg2,$idx)=@_;
  82
  83         $ret="";
  84         $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
  85         $reg1="$regs{$reg1}" if defined($regs{$reg1});
  86         $reg2="$regs{$reg2}" if defined($regs{$reg2});
  87         $ret.=$addr if ($addr ne "") && ($addr ne 0);
  88         if ($reg2 ne "")
  89                 {
  90                 if($idx ne "")
  91                     { $ret.="($reg1,$reg2,$idx)"; }
  92                 else
  93                     { $ret.="($reg1,$reg2)"; }
  94                 }
  95         else
  96                 { $ret.="($reg1)" }
  97         return($ret);
  98         }
  99
 100 sub main'BP
 101         {
 102         return(&main'DWP(@_));
 103         }
 104
 105 sub main'BC
 106         {
 107         return @_;
 108         }
 109
 110 sub main'DWC
 111         {
 112         return @_;
 113         }
 114
 115 #sub main'BP
 116 #       {
 117 #       local($addr,$reg1,$reg2,$idx)=@_;
 118 #
 119 #       $ret="";
 120 #
 121 #       $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
 122 #       $reg1="$regs{$reg1}" if defined($regs{$reg1});
 123 #       $reg2="$regs{$reg2}" if defined($regs{$reg2});
 124 #       $ret.=$addr if ($addr ne "") && ($addr ne 0);
 125 #       if ($reg2 ne "")
 126 #               { $ret.="($reg1,$reg2,$idx)"; }
 127 #       else
 128 #               { $ret.="($reg1)" }
 129 #       return($ret);
 130 #       }
 131
 132 sub main'mov    { &out2("movl",@_); }
 133 sub main'movb   { &out2("movb",@_); }
 134 sub main'and    { &out2("andl",@_); }
 135 sub main'or     { &out2("orl",@_); }
 136 sub main'shl    { &out2("sall",@_); }
 137 sub main'shr    { &out2("shrl",@_); }
 138 sub main'xor    { &out2("xorl",@_); }
 139 sub main'xorb   { &out2("xorb",@_); }
 140 sub main'add    { &out2("addl",@_); }
 141 sub main'adc    { &out2("adcl",@_); }
 142 sub main'sub    { &out2("subl",@_); }
 143 sub main'rotl   { &out2("roll",@_); }
 144 sub main'rotr   { &out2("rorl",@_); }
 145 sub main'exch   { &out2("xchg",@_); }
 146 sub main'cmp    { &out2("cmpl",@_); }
 147 sub main'lea    { &out2("leal",@_); }
 148 sub main'mul    { &out1("mull",@_); }
 149 sub main'div    { &out1("divl",@_); }
 150 sub main'jmp    { &out1("jmp",@_); }
 151 sub main'jmp_ptr { &out1p("jmp",@_); }
 152 sub main'je     { &out1("je",@_); }
 153 sub main'jle    { &out1("jle",@_); }
 154 sub main'jne    { &out1("jne",@_); }
 155 sub main'jnz    { &out1("jnz",@_); }
 156 sub main'jz     { &out1("jz",@_); }
 157 sub main'jge    { &out1("jge",@_); }
 158 sub main'jl     { &out1("jl",@_); }
 159 sub main'jb     { &out1("jb",@_); }
 160 sub main'jc     { &out1("jc",@_); }
 161 sub main'jnc    { &out1("jnc",@_); }
 162 sub main'jno    { &out1("jno",@_); }
 163 sub main'dec    { &out1("decl",@_); }
 164 sub main'inc    { &out1("incl",@_); }
 165 sub main'push   { &out1("pushl",@_); $stack+=4; }
 166 sub main'pop    { &out1("popl",@_); $stack-=4; }
 167 sub main'not    { &out1("notl",@_); }
 168 sub main'call   { &out1("call",$under.$_[0]); }
 169 sub main'ret    { &out0("ret"); }
 170 sub main'nop    { &out0("nop"); }
 171
 172 # The bswapl instruction is new for the 486. Emulate if i386.
 173 sub main'bswap
 174         {
 175         if ($main'i386)
 176                 {
 177                 &main'comment("bswapl @_");
 178                 &main'exch(main'HB(@_),main'LB(@_));
 179                 &main'rotr(@_,16);
 180                 &main'exch(main'HB(@_),main'LB(@_));
 181                 }
 182         else
 183                 {
 184                 &out1("bswapl",@_);
 185                 }
 186         }
 187
 188 sub out2
 189         {
 190         local($name,$p1,$p2)=@_;
 191         local($l,$ll,$t);
 192         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 193                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 194                                 "shll",0xD1E0,"shrl",0xD1E8,
 195                                 "sarl",0xD1F8);
 196
 197         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 198                 {
 199                 $op=$special{$name}|$reg_val{$p1};
 200                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 201                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 202                 push(@out,$tmp1);
 203                 push(@out,$tmp2);
 204
 205                 $p2=&conv($p2);
 206                 $p1=&conv($p1);
 207                 &main'comment("$name $p2 $p1");
 208                 return;
 209                 }
 210
 211         push(@out,"\t$name\t");
 212         $t=&conv($p2).",";
 213         $l=length($t);
 214         push(@out,$t);
 215         $ll=4-($l+9)/8;
 216         $tmp1=sprintf("\t" x $ll);
 217         push(@out,$tmp1);
 218         push(@out,&conv($p1)."\n");
 219         }
 220
 221 sub out1
 222         {
 223         local($name,$p1)=@_;
 224         local($l,$t);
 225         local(%special)=("bswapl",0x0FC8);
 226
 227         if ((defined($special{$name})) && defined($regs{$p1}))
 228                 {
 229                 $op=$special{$name}|$reg_val{$p1};
 230                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 231                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 232                 push(@out,$tmp1);
 233                 push(@out,$tmp2);
 234
 235                 $p2=&conv($p2);
 236                 $p1=&conv($p1);
 237                 &main'comment("$name $p2 $p1");
 238                 return;
 239                 }
 240
 241         push(@out,"\t$name\t".&conv($p1)."\n");
 242         }
 243
 244 sub out1p
 245         {
 246         local($name,$p1)=@_;
 247         local($l,$t);
 248
 249         push(@out,"\t$name\t*".&conv($p1)."\n");
 250         }
 251
 252 sub out0
 253         {
 254         push(@out,"\t$_[0]\n");
 255         }
 256
 257 sub conv
 258         {
 259         local($p)=@_;
 260
 261 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 262
 263         $p=$regs{$p} if (defined($regs{$p}));
 264
 265         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 266         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 267         return $p;
 268         }
 269
 270 sub main'file
 271         {
 272         local($file)=@_;
 273
 274         local($tmp)=<<"EOF";
 275         .file   "$file.s"
 276         .version        "01.01"
 277 gcc2_compiled.:
 278 EOF
 279         push(@out,$tmp);
 280         }
 281
 282 sub main'function_begin
 283         {
 284         local($func)=@_;
 285
 286         &main'external_label($func);
 287         $func=$under.$func;
 288
 289         local($tmp)=<<"EOF";
 290 .text
 291         .align $align
 292 .globl $func
 293 EOF
 294         push(@out,$tmp);
 295         if ($main'cpp)
 296                 { $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
 297         elsif ($main'gaswin)
 298                 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 299         else    { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
 300         push(@out,"$func:\n");
 301         $tmp=<<"EOF";
 302         pushl   %ebp
 303         pushl   %ebx
 304         pushl   %esi
 305         pushl   %edi
 306
 307 EOF
 308         push(@out,$tmp);
 309         $stack=20;
 310         }
 311
 312 sub main'function_begin_B
 313         {
 314         local($func,$extra)=@_;
 315
 316         &main'external_label($func);
 317         $func=$under.$func;
 318
 319         local($tmp)=<<"EOF";
 320 .text
 321         .align $align
 322 .globl $func
 323 EOF
 324         push(@out,$tmp);
 325         if ($main'cpp)
 326                 { push(@out,"\tTYPE($func,\@function)\n"); }
 327         elsif ($main'gaswin)
 328                 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 329         else    { push(@out,"\t.type    $func,\@function\n"); }
 330         push(@out,"$func:\n");
 331         $stack=4;
 332         }
 333
 334 sub main'function_end
 335         {
 336         local($func)=@_;
 337
 338         $func=$under.$func;
 339
 340         local($tmp)=<<"EOF";
 341         popl    %edi
 342         popl    %esi
 343         popl    %ebx
 344         popl    %ebp
 345         ret
 346 .${func}_end:
 347 EOF
 348         push(@out,$tmp);
 349
 350         if ($main'cpp)
 351                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 352         elsif ($main'gaswin)
 353                 { $tmp=push(@out,"\t.align 4\n"); }
 354         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 355         push(@out,".ident       \"$func\"\n");
 356         $stack=0;
 357         %label=();
 358         }
 359
 360 sub main'function_end_A
 361         {
 362         local($func)=@_;
 363
 364         local($tmp)=<<"EOF";
 365         popl    %edi
 366         popl    %esi
 367         popl    %ebx
 368         popl    %ebp
 369         ret
 370 EOF
 371         push(@out,$tmp);
 372         }
 373
 374 sub main'function_end_B
 375         {
 376         local($func)=@_;
 377
 378         $func=$under.$func;
 379
 380         push(@out,".L_${func}_end:\n");
 381         if ($main'cpp)
 382                 { push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
 383         elsif ($main'gaswin)
 384                 { push(@out,"\t.align 4\n"); }
 385         else    { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
 386         push(@out,".ident       \"desasm.pl\"\n");
 387         $stack=0;
 388         %label=();
 389         }
 390
 391 sub main'wparam
 392         {
 393         local($num)=@_;
 394
 395         return(&main'DWP($stack+$num*4,"esp","",0));
 396         }
 397
 398 sub main'stack_push
 399         {
 400         local($num)=@_;
 401         $stack+=$num*4;
 402         &main'sub("esp",$num*4);
 403         }
 404
 405 sub main'stack_pop
 406         {
 407         local($num)=@_;
 408         $stack-=$num*4;
 409         &main'add("esp",$num*4);
 410         }
 411
 412 sub main'swtmp
 413         {
 414         return(&main'DWP($_[0]*4,"esp","",0));
 415         }
 416
 417 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 418 #sub main'wtmp
 419 #       {
 420 #       local($num)=@_;
 421 #
 422 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 423 #       }
 424
 425 sub main'comment
 426         {
 427         foreach (@_)
 428                 {
 429                 if (/^\s*$/)
 430                         { push(@out,"\n"); }
 431                 else
 432                         { push(@out,"\t$com_start $_ $com_end\n"); }
 433                 }
 434         }
 435
 436 sub main'label
 437         {
 438         if (!defined($label{$_[0]}))
 439                 {
 440                 $label{$_[0]}=".${label}${_[0]}";
 441                 $label++;
 442                 }
 443         return($label{$_[0]});
 444         }
 445
 446 sub main'set_label
 447         {
 448         if (!defined($label{$_[0]}))
 449                 {
 450                 $label{$_[0]}=".${label}${_[0]}";
 451                 $label++;
 452                 }
 453         push(@out,".align $align\n") if ($_[1] != 0);
 454         push(@out,"$label{$_[0]}:\n");
 455         }
 456
 457 sub main'file_end
 458         {
 459         if ($const ne "")
 460                 {
 461                 push(@out,".section .rodata\n");
 462                 push(@out,$const);
 463                 $const="";
 464                 }
 465         }
 466
 467 sub main'data_word
 468         {
 469         push(@out,"\t.long $_[0]\n");
 470         }
 471
 472 # debug output functions: puts, putx, printf
 473
 474 sub main'puts
 475         {
 476         &pushvars();
 477         &main'push('$Lstring' . ++$constl);
 478         &main'call('puts');
 479         $stack-=4;
 480         &main'add("esp",4);
 481         &popvars();
 482
 483         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 484         }
 485
 486 sub main'putx
 487         {
 488         &pushvars();
 489         &main'push($_[0]);
 490         &main'push('$Lstring' . ++$constl);
 491         &main'call('printf');
 492         &main'add("esp",8);
 493         $stack-=8;
 494         &popvars();
 495
 496         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 497         }
 498
 499 sub main'printf
 500         {
 501         $ostack = $stack;
 502         &pushvars();
 503         for ($i = @_ - 1; $i >= 0; $i--)
 504                 {
 505                 if ($i == 0) # change this to support %s format strings
 506                         {
 507                         &main'push('$Lstring' . ++$constl);
 508                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
 509                         }
 510                 else
 511                         {
 512                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
 513                                 {
 514                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
 515                                 }
 516                         else
 517                                 {
 518                                 &main'push($_[$i]);
 519                                 }
 520                         }
 521                 }
 522         &main'call('printf');
 523         $stack-=4*@_;
 524         &main'add("esp",4*@_);
 525         &popvars();
 526         }
 527
 528 sub pushvars
 529         {
 530         &out0("pushf");
 531         &main'push("edx");
 532         &main'push("ecx");
 533         &main'push("eax");
 534         }
 535
 536 sub popvars
 537         {
 538         &main'pop("eax");
 539         &main'pop("ecx");
 540         &main'pop("edx");
 541         &out0("popf");
 542         }