crypto/openssl-0.9.7d/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'ja     { &out1("ja",@_); }
 160 sub main'jae    { &out1("jae",@_); }
 161 sub main'jb     { &out1("jb",@_); }
 162 sub main'jbe    { &out1("jbe",@_); }
 163 sub main'jc     { &out1("jc",@_); }
 164 sub main'jnc    { &out1("jnc",@_); }
 165 sub main'jno    { &out1("jno",@_); }
 166 sub main'dec    { &out1("decl",@_); }
 167 sub main'inc    { &out1("incl",@_); }
 168 sub main'push   { &out1("pushl",@_); $stack+=4; }
 169 sub main'pop    { &out1("popl",@_); $stack-=4; }
 170 sub main'pushf  { &out0("pushf"); $stack+=4; }
 171 sub main'popf   { &out0("popf"); $stack-=4; }
 172 sub main'not    { &out1("notl",@_); }
 173 sub main'call   { &out1("call",($_[0]=~/^\.L/?'':$under).$_[0]); }
 174 sub main'ret    { &out0("ret"); }
 175 sub main'nop    { &out0("nop"); }
 176
 177 # The bswapl instruction is new for the 486. Emulate if i386.
 178 sub main'bswap
 179         {
 180         if ($main'i386)
 181                 {
 182                 &main'comment("bswapl @_");
 183                 &main'exch(main'HB(@_),main'LB(@_));
 184                 &main'rotr(@_,16);
 185                 &main'exch(main'HB(@_),main'LB(@_));
 186                 }
 187         else
 188                 {
 189                 &out1("bswapl",@_);
 190                 }
 191         }
 192
 193 sub out2
 194         {
 195         local($name,$p1,$p2)=@_;
 196         local($l,$ll,$t);
 197         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 198                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 199                                 "shll",0xD1E0,"shrl",0xD1E8,
 200                                 "sarl",0xD1F8);
 201
 202         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 203                 {
 204                 $op=$special{$name}|$reg_val{$p1};
 205                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 206                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 207                 push(@out,$tmp1);
 208                 push(@out,$tmp2);
 209
 210                 $p2=&conv($p2);
 211                 $p1=&conv($p1);
 212                 &main'comment("$name $p2 $p1");
 213                 return;
 214                 }
 215
 216         push(@out,"\t$name\t");
 217         $t=&conv($p2).",";
 218         $l=length($t);
 219         push(@out,$t);
 220         $ll=4-($l+9)/8;
 221         $tmp1=sprintf("\t" x $ll);
 222         push(@out,$tmp1);
 223         push(@out,&conv($p1)."\n");
 224         }
 225
 226 sub out1
 227         {
 228         local($name,$p1)=@_;
 229         local($l,$t);
 230         local(%special)=("bswapl",0x0FC8);
 231
 232         if ((defined($special{$name})) && defined($regs{$p1}))
 233                 {
 234                 $op=$special{$name}|$reg_val{$p1};
 235                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 236                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 237                 push(@out,$tmp1);
 238                 push(@out,$tmp2);
 239
 240                 $p2=&conv($p2);
 241                 $p1=&conv($p1);
 242                 &main'comment("$name $p2 $p1");
 243                 return;
 244                 }
 245
 246         push(@out,"\t$name\t".&conv($p1)."\n");
 247         }
 248
 249 sub out1p
 250         {
 251         local($name,$p1)=@_;
 252         local($l,$t);
 253
 254         push(@out,"\t$name\t*".&conv($p1)."\n");
 255         }
 256
 257 sub out0
 258         {
 259         push(@out,"\t$_[0]\n");
 260         }
 261
 262 sub conv
 263         {
 264         local($p)=@_;
 265
 266 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 267
 268         $p=$regs{$p} if (defined($regs{$p}));
 269
 270         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 271         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 272         return $p;
 273         }
 274
 275 sub main'file
 276         {
 277         local($file)=@_;
 278
 279         local($tmp)=<<"EOF";
 280         .file   "$file.s"
 281         .version        "01.01"
 282 gcc2_compiled.:
 283 EOF
 284         push(@out,$tmp);
 285         }
 286
 287 sub main'function_begin
 288         {
 289         local($func)=@_;
 290
 291         &main'external_label($func);
 292         $func=$under.$func;
 293
 294         local($tmp)=<<"EOF";
 295 .text
 296         .align $align
 297 .globl $func
 298 EOF
 299         push(@out,$tmp);
 300         if ($main'cpp)
 301                 { $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
 302         elsif ($main'gaswin)
 303                 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 304         else    { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
 305         push(@out,"$func:\n");
 306         $tmp=<<"EOF";
 307         pushl   %ebp
 308         pushl   %ebx
 309         pushl   %esi
 310         pushl   %edi
 311
 312 EOF
 313         push(@out,$tmp);
 314         $stack=20;
 315         }
 316
 317 sub main'function_begin_B
 318         {
 319         local($func,$extra)=@_;
 320
 321         &main'external_label($func);
 322         $func=$under.$func;
 323
 324         local($tmp)=<<"EOF";
 325 .text
 326         .align $align
 327 .globl $func
 328 EOF
 329         push(@out,$tmp);
 330         if ($main'cpp)
 331                 { push(@out,"\tTYPE($func,\@function)\n"); }
 332         elsif ($main'gaswin)
 333                 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 334         else    { push(@out,"\t.type    $func,\@function\n"); }
 335         push(@out,"$func:\n");
 336         $stack=4;
 337         }
 338
 339 sub main'function_end
 340         {
 341         local($func)=@_;
 342
 343         $func=$under.$func;
 344
 345         local($tmp)=<<"EOF";
 346         popl    %edi
 347         popl    %esi
 348         popl    %ebx
 349         popl    %ebp
 350         ret
 351 .L_${func}_end:
 352 EOF
 353         push(@out,$tmp);
 354
 355         if ($main'cpp)
 356                 { push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
 357         elsif ($main'gaswin)
 358                 { $tmp=push(@out,"\t.align 4\n"); }
 359         else    { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
 360         push(@out,".ident       \"$func\"\n");
 361         $stack=0;
 362         %label=();
 363         }
 364
 365 sub main'function_end_A
 366         {
 367         local($func)=@_;
 368
 369         local($tmp)=<<"EOF";
 370         popl    %edi
 371         popl    %esi
 372         popl    %ebx
 373         popl    %ebp
 374         ret
 375 EOF
 376         push(@out,$tmp);
 377         }
 378
 379 sub main'function_end_B
 380         {
 381         local($func)=@_;
 382
 383         $func=$under.$func;
 384
 385         push(@out,".L_${func}_end:\n");
 386         if ($main'cpp)
 387                 { push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
 388         elsif ($main'gaswin)
 389                 { push(@out,"\t.align 4\n"); }
 390         else    { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
 391         push(@out,".ident       \"desasm.pl\"\n");
 392         $stack=0;
 393         %label=();
 394         }
 395
 396 sub main'wparam
 397         {
 398         local($num)=@_;
 399
 400         return(&main'DWP($stack+$num*4,"esp","",0));
 401         }
 402
 403 sub main'stack_push
 404         {
 405         local($num)=@_;
 406         $stack+=$num*4;
 407         &main'sub("esp",$num*4);
 408         }
 409
 410 sub main'stack_pop
 411         {
 412         local($num)=@_;
 413         $stack-=$num*4;
 414         &main'add("esp",$num*4);
 415         }
 416
 417 sub main'swtmp
 418         {
 419         return(&main'DWP($_[0]*4,"esp","",0));
 420         }
 421
 422 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 423 #sub main'wtmp
 424 #       {
 425 #       local($num)=@_;
 426 #
 427 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 428 #       }
 429
 430 sub main'comment
 431         {
 432         if ($main'elf)  # GNU and SVR4 as'es use different comment delimiters,
 433                 {       # so we just skip comments...
 434                 push(@out,"\n");
 435                 return;
 436                 }
 437         foreach (@_)
 438                 {
 439                 if (/^\s*$/)
 440                         { push(@out,"\n"); }
 441                 else
 442                         { push(@out,"\t$com_start $_ $com_end\n"); }
 443                 }
 444         }
 445
 446 sub main'label
 447         {
 448         if (!defined($label{$_[0]}))
 449                 {
 450                 $label{$_[0]}=".${label}${_[0]}";
 451                 $label++;
 452                 }
 453         return($label{$_[0]});
 454         }
 455
 456 sub main'set_label
 457         {
 458         if (!defined($label{$_[0]}))
 459                 {
 460                 $label{$_[0]}=".${label}${_[0]}";
 461                 $label++;
 462                 }
 463         push(@out,".align $align\n") if ($_[1] != 0);
 464         push(@out,"$label{$_[0]}:\n");
 465         }
 466
 467 sub main'file_end
 468         {
 469         if ($const ne "")
 470                 {
 471                 push(@out,".section .rodata\n");
 472                 push(@out,$const);
 473                 $const="";
 474                 }
 475         }
 476
 477 sub main'data_word
 478         {
 479         push(@out,"\t.long $_[0]\n");
 480         }
 481
 482 # debug output functions: puts, putx, printf
 483
 484 sub main'puts
 485         {
 486         &pushvars();
 487         &main'push('$Lstring' . ++$constl);
 488         &main'call('puts');
 489         $stack-=4;
 490         &main'add("esp",4);
 491         &popvars();
 492
 493         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 494         }
 495
 496 sub main'putx
 497         {
 498         &pushvars();
 499         &main'push($_[0]);
 500         &main'push('$Lstring' . ++$constl);
 501         &main'call('printf');
 502         &main'add("esp",8);
 503         $stack-=8;
 504         &popvars();
 505
 506         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 507         }
 508
 509 sub main'printf
 510         {
 511         $ostack = $stack;
 512         &pushvars();
 513         for ($i = @_ - 1; $i >= 0; $i--)
 514                 {
 515                 if ($i == 0) # change this to support %s format strings
 516                         {
 517                         &main'push('$Lstring' . ++$constl);
 518                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
 519                         }
 520                 else
 521                         {
 522                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
 523                                 {
 524                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
 525                                 }
 526                         else
 527                                 {
 528                                 &main'push($_[$i]);
 529                                 }
 530                         }
 531                 }
 532         &main'call('printf');
 533         $stack-=4*@_;
 534         &main'add("esp",4*@_);
 535         &popvars();
 536         }
 537
 538 sub pushvars
 539         {
 540         &main'pushf();
 541         &main'push("edx");
 542         &main'push("ecx");
 543         &main'push("eax");
 544         }
 545
 546 sub popvars
 547         {
 548         &main'pop("eax");
 549         &main'pop("ecx");
 550         &main'pop("edx");
 551         &main'popf();
 552         }
 553
 554 sub main'picmeup
 555         {
 556         local($dst,$sym)=@_;
 557         if ($main'cpp)
 558                 {
 559                 local($tmp)=<<___;
 560 #if (defined(ELF) || defined(SOL)) && defined(PIC)
 561         .align  8
 562         call    1f
 563 1:      popl    $regs{$dst}
 564         addl    \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
 565         movl    $sym\@GOT($regs{$dst}),$regs{$dst}
 566 #else
 567         leal    $sym,$regs{$dst}
 568 #endif
 569 ___
 570                 push(@out,$tmp);
 571                 }
 572         elsif ($main'pic && ($main'elf || $main'aout))
 573                 {
 574                 push(@out,"\t.align\t8\n");
 575                 &main'call(&main'label("PIC_me_up"));
 576                 &main'set_label("PIC_me_up");
 577                 &main'blindpop($dst);
 578                 &main'add($dst,"\$$under"."_GLOBAL_OFFSET_TABLE_+[.-".
 579                                 &main'label("PIC_me_up") . "]");
 580                 &main'mov($dst,&main'DWP($sym."\@GOT",$dst));
 581                 }
 582         else
 583                 {
 584                 &main'lea($dst,&main'DWP($sym));
 585                 }
 586         }
 587
 588 sub main'blindpop { &out1("popl",@_); }