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         $addr =~ s/(^|[+ \t])([A-Za-z_]+[A-Za-z0-9_]+)($|[+ \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 "" && $idx != 0)
  91                     { $ret.="($reg1,$reg2,$idx)"; }
  92                 else
  93                     { $ret.="($reg1,$reg2)"; }
  94                 }
  95         elsif ($reg1 ne "")
  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'pushf  { &out0("pushf"); $stack+=4; }
 168 sub main'popf   { &out0("popf"); $stack-=4; }
 169 sub main'not    { &out1("notl",@_); }
 170 sub main'call   { &out1("call",($_[0]=~/^\.L/?'':$under).$_[0]); }
 171 sub main'ret    { &out0("ret"); }
 172 sub main'nop    { &out0("nop"); }
 173
 174 # The bswapl instruction is new for the 486. Emulate if i386.
 175 sub main'bswap
 176         {
 177         if ($main'i386)
 178                 {
 179                 &main'comment("bswapl @_");
 180                 &main'exch(main'HB(@_),main'LB(@_));
 181                 &main'rotr(@_,16);
 182                 &main'exch(main'HB(@_),main'LB(@_));
 183                 }
 184         else
 185                 {
 186                 &out1("bswapl",@_);
 187                 }
 188         }
 189
 190 sub out2
 191         {
 192         local($name,$p1,$p2)=@_;
 193         local($l,$ll,$t);
 194         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 195                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 196                                 "shll",0xD1E0,"shrl",0xD1E8,
 197                                 "sarl",0xD1F8);
 198
 199         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 200                 {
 201                 $op=$special{$name}|$reg_val{$p1};
 202                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 203                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 204                 push(@out,$tmp1);
 205                 push(@out,$tmp2);
 206
 207                 $p2=&conv($p2);
 208                 $p1=&conv($p1);
 209                 &main'comment("$name $p2 $p1");
 210                 return;
 211                 }
 212
 213         push(@out,"\t$name\t");
 214         $t=&conv($p2).",";
 215         $l=length($t);
 216         push(@out,$t);
 217         $ll=4-($l+9)/8;
 218         $tmp1=sprintf("\t" x $ll);
 219         push(@out,$tmp1);
 220         push(@out,&conv($p1)."\n");
 221         }
 222
 223 sub out1
 224         {
 225         local($name,$p1)=@_;
 226         local($l,$t);
 227         local(%special)=("bswapl",0x0FC8);
 228
 229         if ((defined($special{$name})) && defined($regs{$p1}))
 230                 {
 231                 $op=$special{$name}|$reg_val{$p1};
 232                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 233                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 234                 push(@out,$tmp1);
 235                 push(@out,$tmp2);
 236
 237                 $p2=&conv($p2);
 238                 $p1=&conv($p1);
 239                 &main'comment("$name $p2 $p1");
 240                 return;
 241                 }
 242
 243         push(@out,"\t$name\t".&conv($p1)."\n");
 244         }
 245
 246 sub out1p
 247         {
 248         local($name,$p1)=@_;
 249         local($l,$t);
 250
 251         push(@out,"\t$name\t*".&conv($p1)."\n");
 252         }
 253
 254 sub out0
 255         {
 256         push(@out,"\t$_[0]\n");
 257         }
 258
 259 sub conv
 260         {
 261         local($p)=@_;
 262
 263 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 264
 265         $p=$regs{$p} if (defined($regs{$p}));
 266
 267         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 268         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 269         return $p;
 270         }
 271
 272 sub main'file
 273         {
 274         local($file)=@_;
 275
 276         local($tmp)=<<"EOF";
 277         .file   "$file.s"
 278         .version        "01.01"
 279 gcc2_compiled.:
 280 EOF
 281         push(@out,$tmp);
 282         }
 283
 284 sub main'function_begin
 285         {
 286         local($func)=@_;
 287
 288         &main'external_label($func);
 289         $func=$under.$func;
 290
 291         local($tmp)=<<"EOF";
 292 .text
 293         .align $align
 294 .globl $func
 295 EOF
 296         push(@out,$tmp);
 297         if ($main'cpp)
 298                 { $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
 299         elsif ($main'gaswin)
 300                 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 301         else    { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
 302         push(@out,"$func:\n");
 303         $tmp=<<"EOF";
 304         pushl   %ebp
 305         pushl   %ebx
 306         pushl   %esi
 307         pushl   %edi
 308
 309 EOF
 310         push(@out,$tmp);
 311         $stack=20;
 312         }
 313
 314 sub main'function_begin_B
 315         {
 316         local($func,$extra)=@_;
 317
 318         &main'external_label($func);
 319         $func=$under.$func;
 320
 321         local($tmp)=<<"EOF";
 322 .text
 323         .align $align
 324 .globl $func
 325 EOF
 326         push(@out,$tmp);
 327         if ($main'cpp)
 328                 { push(@out,"\tTYPE($func,\@function)\n"); }
 329         elsif ($main'gaswin)
 330                 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 331         else    { push(@out,"\t.type    $func,\@function\n"); }
 332         push(@out,"$func:\n");
 333         $stack=4;
 334         }
 335
 336 sub main'function_end
 337         {
 338         local($func)=@_;
 339
 340         $func=$under.$func;
 341
 342         local($tmp)=<<"EOF";
 343         popl    %edi
 344         popl    %esi
 345         popl    %ebx
 346         popl    %ebp
 347         ret
 348 .${func}_end:
 349 EOF
 350         push(@out,$tmp);
 351
 352         if ($main'cpp)
 353                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 354         elsif ($main'gaswin)
 355                 { $tmp=push(@out,"\t.align 4\n"); }
 356         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 357         push(@out,".ident       \"$func\"\n");
 358         $stack=0;
 359         %label=();
 360         }
 361
 362 sub main'function_end_A
 363         {
 364         local($func)=@_;
 365
 366         local($tmp)=<<"EOF";
 367         popl    %edi
 368         popl    %esi
 369         popl    %ebx
 370         popl    %ebp
 371         ret
 372 EOF
 373         push(@out,$tmp);
 374         }
 375
 376 sub main'function_end_B
 377         {
 378         local($func)=@_;
 379
 380         $func=$under.$func;
 381
 382         push(@out,".L_${func}_end:\n");
 383         if ($main'cpp)
 384                 { push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
 385         elsif ($main'gaswin)
 386                 { push(@out,"\t.align 4\n"); }
 387         else    { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
 388         push(@out,".ident       \"desasm.pl\"\n");
 389         $stack=0;
 390         %label=();
 391         }
 392
 393 sub main'wparam
 394         {
 395         local($num)=@_;
 396
 397         return(&main'DWP($stack+$num*4,"esp","",0));
 398         }
 399
 400 sub main'stack_push
 401         {
 402         local($num)=@_;
 403         $stack+=$num*4;
 404         &main'sub("esp",$num*4);
 405         }
 406
 407 sub main'stack_pop
 408         {
 409         local($num)=@_;
 410         $stack-=$num*4;
 411         &main'add("esp",$num*4);
 412         }
 413
 414 sub main'swtmp
 415         {
 416         return(&main'DWP($_[0]*4,"esp","",0));
 417         }
 418
 419 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 420 #sub main'wtmp
 421 #       {
 422 #       local($num)=@_;
 423 #
 424 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 425 #       }
 426
 427 sub main'comment
 428         {
 429         if ($main'elf)  # GNU and SVR4 as'es use different comment delimiters,
 430                 {       # so we just skip comments...
 431                 push(@out,"\n");
 432                 return;
 433                 }
 434         foreach (@_)
 435                 {
 436                 if (/^\s*$/)
 437                         { push(@out,"\n"); }
 438                 else
 439                         { push(@out,"\t$com_start $_ $com_end\n"); }
 440                 }
 441         }
 442
 443 sub main'label
 444         {
 445         if (!defined($label{$_[0]}))
 446                 {
 447                 $label{$_[0]}=".${label}${_[0]}";
 448                 $label++;
 449                 }
 450         return($label{$_[0]});
 451         }
 452
 453 sub main'set_label
 454         {
 455         if (!defined($label{$_[0]}))
 456                 {
 457                 $label{$_[0]}=".${label}${_[0]}";
 458                 $label++;
 459                 }
 460         push(@out,".align $align\n") if ($_[1] != 0);
 461         push(@out,"$label{$_[0]}:\n");
 462         }
 463
 464 sub main'file_end
 465         {
 466         if ($const ne "")
 467                 {
 468                 push(@out,".section .rodata\n");
 469                 push(@out,$const);
 470                 $const="";
 471                 }
 472         }
 473
 474 sub main'data_word
 475         {
 476         push(@out,"\t.long $_[0]\n");
 477         }
 478
 479 # debug output functions: puts, putx, printf
 480
 481 sub main'puts
 482         {
 483         &pushvars();
 484         &main'push('$Lstring' . ++$constl);
 485         &main'call('puts');
 486         $stack-=4;
 487         &main'add("esp",4);
 488         &popvars();
 489
 490         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 491         }
 492
 493 sub main'putx
 494         {
 495         &pushvars();
 496         &main'push($_[0]);
 497         &main'push('$Lstring' . ++$constl);
 498         &main'call('printf');
 499         &main'add("esp",8);
 500         $stack-=8;
 501         &popvars();
 502
 503         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 504         }
 505
 506 sub main'printf
 507         {
 508         $ostack = $stack;
 509         &pushvars();
 510         for ($i = @_ - 1; $i >= 0; $i--)
 511                 {
 512                 if ($i == 0) # change this to support %s format strings
 513                         {
 514                         &main'push('$Lstring' . ++$constl);
 515                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
 516                         }
 517                 else
 518                         {
 519                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
 520                                 {
 521                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
 522                                 }
 523                         else
 524                                 {
 525                                 &main'push($_[$i]);
 526                                 }
 527                         }
 528                 }
 529         &main'call('printf');
 530         $stack-=4*@_;
 531         &main'add("esp",4*@_);
 532         &popvars();
 533         }
 534
 535 sub pushvars
 536         {
 537         &main'pushf();
 538         &main'push("edx");
 539         &main'push("ecx");
 540         &main'push("eax");
 541         }
 542
 543 sub popvars
 544         {
 545         &main'pop("eax");
 546         &main'pop("ecx");
 547         &main'pop("edx");
 548         &main'popf();
 549         }
 550
 551 sub main'picmeup
 552         {
 553         local($dst,$sym)=@_;
 554         if ($main'cpp)
 555                 {
 556                 local($tmp)=<<___;
 557 #if (defined(ELF) || defined(SOL)) && defined(PIC)
 558         .align  8
 559         call    1f
 560 1:      popl    $regs{$dst}
 561         addl    \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
 562         movl    $sym\@GOT($regs{$dst}),$regs{$dst}
 563 #else
 564         leal    $sym,$regs{$dst}
 565 #endif
 566 ___
 567                 push(@out,$tmp);
 568                 }
 569         elsif ($main'pic && $main'elf)
 570                 {
 571                 push(@out,"\t.align\t8\n");
 572                 &main'call(&main'label("PIC_me_up"));
 573                 &main'set_label("PIC_me_up");
 574                 &main'blindpop($dst);
 575                 &main'add($dst,"\$_GLOBAL_OFFSET_TABLE_+[.-" .
 576                                 &main'label("PIC_me_up") . "]");
 577                 &main'mov($dst,&main'DWP("$under$sym\@GOT",$dst));
 578                 }
 579         else
 580                 {
 581                 &main'lea($dst,&main'DWP("$under$sym"));
 582                 }
 583         }
 584
 585 sub main'blindpop { &out1("popl",@_); }