crypto/perlasm/x86unix.pl

   1 #!/usr/local/bin/perl
   2
   3 package x86unix;        # GAS actually...
   4
   5 $label="L000";
   6 $const="";
   7 $constl=0;
   8
   9 $align=($main'aout)?"4":"16";
  10 $under=($main'aout or $main'coff)?"_":"";
  11 $com_start="#" if ($main'aout or $main'coff);
  12
  13 sub main'asm_init_output { @out=(); }
  14 sub main'asm_get_output { return(@out); }
  15 sub main'get_labels { return(@labels); }
  16 sub main'external_label { push(@labels,@_); }
  17
  18 if ($main'cpp)
  19         {
  20         $align="ALIGN";
  21         $under="";
  22         $com_start='/*';
  23         $com_end='*/';
  24         }
  25
  26 %lb=(   'eax',  '%al',
  27         'ebx',  '%bl',
  28         'ecx',  '%cl',
  29         'edx',  '%dl',
  30         'ax',   '%al',
  31         'bx',   '%bl',
  32         'cx',   '%cl',
  33         'dx',   '%dl',
  34         );
  35
  36 %hb=(   'eax',  '%ah',
  37         'ebx',  '%bh',
  38         'ecx',  '%ch',
  39         'edx',  '%dh',
  40         'ax',   '%ah',
  41         'bx',   '%bh',
  42         'cx',   '%ch',
  43         'dx',   '%dh',
  44         );
  45
  46 %regs=( 'eax',  '%eax',
  47         'ebx',  '%ebx',
  48         'ecx',  '%ecx',
  49         'edx',  '%edx',
  50         'esi',  '%esi',
  51         'edi',  '%edi',
  52         'ebp',  '%ebp',
  53         'esp',  '%esp',
  54
  55         'mm0',  '%mm0',
  56         'mm1',  '%mm1',
  57         'mm2',  '%mm2',
  58         'mm3',  '%mm3',
  59         'mm4',  '%mm4',
  60         'mm5',  '%mm5',
  61         'mm6',  '%mm6',
  62         'mm7',  '%mm7',
  63
  64         'xmm0', '%xmm0',
  65         'xmm1', '%xmm1',
  66         'xmm2', '%xmm2',
  67         'xmm3', '%xmm3',
  68         'xmm4', '%xmm4',
  69         'xmm5', '%xmm5',
  70         'xmm6', '%xmm6',
  71         'xmm7', '%xmm7',
  72         );
  73
  74 %reg_val=(
  75         'eax',  0x00,
  76         'ebx',  0x03,
  77         'ecx',  0x01,
  78         'edx',  0x02,
  79         'esi',  0x06,
  80         'edi',  0x07,
  81         'ebp',  0x05,
  82         'esp',  0x04,
  83         );
  84
  85 sub main'LB
  86         {
  87         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  88         return($lb{$_[0]});
  89         }
  90
  91 sub main'HB
  92         {
  93         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  94         return($hb{$_[0]});
  95         }
  96
  97 sub main'DWP
  98         {
  99         local($addr,$reg1,$reg2,$idx)=@_;
 100
 101         $ret="";
 102         $addr =~ s/(^|[+ \t])([A-Za-z_]+[A-Za-z0-9_]+)($|[+ \t])/$1$under$2$3/;
 103         $reg1="$regs{$reg1}" if defined($regs{$reg1});
 104         $reg2="$regs{$reg2}" if defined($regs{$reg2});
 105         $ret.=$addr if ($addr ne "") && ($addr ne 0);
 106         if ($reg2 ne "")
 107                 {
 108                 if($idx ne "" && $idx != 0)
 109                     { $ret.="($reg1,$reg2,$idx)"; }
 110                 else
 111                     { $ret.="($reg1,$reg2)"; }
 112                 }
 113         elsif ($reg1 ne "")
 114                 { $ret.="($reg1)" }
 115         return($ret);
 116         }
 117
 118 sub main'QWP
 119         {
 120         return(&main'DWP(@_));
 121         }
 122
 123 sub main'BP
 124         {
 125         return(&main'DWP(@_));
 126         }
 127
 128 sub main'BC
 129         {
 130         return @_;
 131         }
 132
 133 sub main'DWC
 134         {
 135         return @_;
 136         }
 137
 138 #sub main'BP
 139 #       {
 140 #       local($addr,$reg1,$reg2,$idx)=@_;
 141 #
 142 #       $ret="";
 143 #
 144 #       $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
 145 #       $reg1="$regs{$reg1}" if defined($regs{$reg1});
 146 #       $reg2="$regs{$reg2}" if defined($regs{$reg2});
 147 #       $ret.=$addr if ($addr ne "") && ($addr ne 0);
 148 #       if ($reg2 ne "")
 149 #               { $ret.="($reg1,$reg2,$idx)"; }
 150 #       else
 151 #               { $ret.="($reg1)" }
 152 #       return($ret);
 153 #       }
 154
 155 sub main'mov    { &out2("movl",@_); }
 156 sub main'movb   { &out2("movb",@_); }
 157 sub main'and    { &out2("andl",@_); }
 158 sub main'or     { &out2("orl",@_); }
 159 sub main'shl    { &out2("sall",@_); }
 160 sub main'shr    { &out2("shrl",@_); }
 161 sub main'xor    { &out2("xorl",@_); }
 162 sub main'xorb   { &out2("xorb",@_); }
 163 sub main'add    { &out2("addl",@_); }
 164 sub main'adc    { &out2("adcl",@_); }
 165 sub main'sub    { &out2("subl",@_); }
 166 sub main'rotl   { &out2("roll",@_); }
 167 sub main'rotr   { &out2("rorl",@_); }
 168 sub main'exch   { &out2("xchg",@_); }
 169 sub main'cmp    { &out2("cmpl",@_); }
 170 sub main'lea    { &out2("leal",@_); }
 171 sub main'mul    { &out1("mull",@_); }
 172 sub main'div    { &out1("divl",@_); }
 173 sub main'jmp    { &out1("jmp",@_); }
 174 sub main'jmp_ptr { &out1p("jmp",@_); }
 175 sub main'je     { &out1("je",@_); }
 176 sub main'jle    { &out1("jle",@_); }
 177 sub main'jne    { &out1("jne",@_); }
 178 sub main'jnz    { &out1("jnz",@_); }
 179 sub main'jz     { &out1("jz",@_); }
 180 sub main'jge    { &out1("jge",@_); }
 181 sub main'jl     { &out1("jl",@_); }
 182 sub main'ja     { &out1("ja",@_); }
 183 sub main'jae    { &out1("jae",@_); }
 184 sub main'jb     { &out1("jb",@_); }
 185 sub main'jbe    { &out1("jbe",@_); }
 186 sub main'jc     { &out1("jc",@_); }
 187 sub main'jnc    { &out1("jnc",@_); }
 188 sub main'jno    { &out1("jno",@_); }
 189 sub main'dec    { &out1("decl",@_); }
 190 sub main'inc    { &out1("incl",@_); }
 191 sub main'push   { &out1("pushl",@_); $stack+=4; }
 192 sub main'pop    { &out1("popl",@_); $stack-=4; }
 193 sub main'pushf  { &out0("pushf"); $stack+=4; }
 194 sub main'popf   { &out0("popf"); $stack-=4; }
 195 sub main'not    { &out1("notl",@_); }
 196 sub main'call   { &out1("call",($_[0]=~/^\.L/?'':$under).$_[0]); }
 197 sub main'ret    { &out0("ret"); }
 198 sub main'nop    { &out0("nop"); }
 199 sub main'test   { &out2("testl",@_); }
 200 sub main'bt     { &out2("btl",@_); }
 201 sub main'leave  { &out0("leave"); }
 202 sub main'cpuid  { &out0(".word\t0xa20f"); }
 203 sub main'rdtsc  { &out0(".word\t0x310f"); }
 204
 205 # SSE2
 206 sub main'emms   { &out0("emms"); }
 207 sub main'movd   { &out2("movd",@_); }
 208 sub main'movq   { &out2("movq",@_); }
 209 sub main'movdqu { &out2("movdqu",@_); }
 210 sub main'movdqa { &out2("movdqa",@_); }
 211 sub main'movdq2q{ &out2("movdq2q",@_); }
 212 sub main'movq2dq{ &out2("movq2dq",@_); }
 213 sub main'paddq  { &out2("paddq",@_); }
 214 sub main'pmuludq{ &out2("pmuludq",@_); }
 215 sub main'psrlq  { &out2("psrlq",@_); }
 216 sub main'psllq  { &out2("psllq",@_); }
 217 sub main'pxor   { &out2("pxor",@_); }
 218 sub main'por    { &out2("por",@_); }
 219 sub main'pand   { &out2("pand",@_); }
 220
 221 # The bswapl instruction is new for the 486. Emulate if i386.
 222 sub main'bswap
 223         {
 224         if ($main'i386)
 225                 {
 226                 &main'comment("bswapl @_");
 227                 &main'exch(main'HB(@_),main'LB(@_));
 228                 &main'rotr(@_,16);
 229                 &main'exch(main'HB(@_),main'LB(@_));
 230                 }
 231         else
 232                 {
 233                 &out1("bswapl",@_);
 234                 }
 235         }
 236
 237 sub out2
 238         {
 239         local($name,$p1,$p2)=@_;
 240         local($l,$ll,$t);
 241         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 242                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 243                                 "shll",0xD1E0,"shrl",0xD1E8,
 244                                 "sarl",0xD1F8);
 245
 246         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 247                 {
 248                 $op=$special{$name}|$reg_val{$p1};
 249                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 250                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 251                 push(@out,$tmp1);
 252                 push(@out,$tmp2);
 253
 254                 $p2=&conv($p2);
 255                 $p1=&conv($p1);
 256                 &main'comment("$name $p2 $p1");
 257                 return;
 258                 }
 259
 260         push(@out,"\t$name\t");
 261         $t=&conv($p2).",";
 262         $l=length($t);
 263         push(@out,$t);
 264         $ll=4-($l+9)/8;
 265         $tmp1=sprintf("\t" x $ll);
 266         push(@out,$tmp1);
 267         push(@out,&conv($p1)."\n");
 268         }
 269
 270 sub out1
 271         {
 272         local($name,$p1)=@_;
 273         local($l,$t);
 274         local(%special)=("bswapl",0x0FC8);
 275
 276         if ((defined($special{$name})) && defined($regs{$p1}))
 277                 {
 278                 $op=$special{$name}|$reg_val{$p1};
 279                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 280                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 281                 push(@out,$tmp1);
 282                 push(@out,$tmp2);
 283
 284                 $p2=&conv($p2);
 285                 $p1=&conv($p1);
 286                 &main'comment("$name $p2 $p1");
 287                 return;
 288                 }
 289
 290         push(@out,"\t$name\t".&conv($p1)."\n");
 291         }
 292
 293 sub out1p
 294         {
 295         local($name,$p1)=@_;
 296         local($l,$t);
 297
 298         push(@out,"\t$name\t*".&conv($p1)."\n");
 299         }
 300
 301 sub out0
 302         {
 303         push(@out,"\t$_[0]\n");
 304         }
 305
 306 sub conv
 307         {
 308         local($p)=@_;
 309
 310 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 311
 312         $p=$regs{$p} if (defined($regs{$p}));
 313
 314         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 315         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 316         return $p;
 317         }
 318
 319 sub main'file
 320         {
 321         local($file)=@_;
 322
 323         local($tmp)=<<"EOF";
 324         .file   "$file.s"
 325 EOF
 326         push(@out,$tmp);
 327         }
 328
 329 sub main'function_begin
 330         {
 331         local($func)=@_;
 332
 333         &main'external_label($func);
 334         $func=$under.$func;
 335
 336         local($tmp)=<<"EOF";
 337 .text
 338 .align $align
 339 .globl $func
 340 EOF
 341         push(@out,$tmp);
 342         if ($main'cpp)
 343                 { $tmp=push(@out,"TYPE($func,\@function)\n"); }
 344         elsif ($main'coff)
 345                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 346         elsif ($main'aout)
 347                 { }
 348         else    { $tmp=push(@out,".type\t$func,\@function\n"); }
 349         push(@out,"$func:\n");
 350         $tmp=<<"EOF";
 351         pushl   %ebp
 352         pushl   %ebx
 353         pushl   %esi
 354         pushl   %edi
 355
 356 EOF
 357         push(@out,$tmp);
 358         $stack=20;
 359         }
 360
 361 sub main'function_begin_B
 362         {
 363         local($func,$extra)=@_;
 364
 365         &main'external_label($func);
 366         $func=$under.$func;
 367
 368         local($tmp)=<<"EOF";
 369 .text
 370 .align $align
 371 .globl $func
 372 EOF
 373         push(@out,$tmp);
 374         if ($main'cpp)
 375                 { push(@out,"TYPE($func,\@function)\n"); }
 376         elsif ($main'coff)
 377                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 378         elsif ($main'aout)
 379                 { }
 380         else    { push(@out,".type      $func,\@function\n"); }
 381         push(@out,"$func:\n");
 382         $stack=4;
 383         }
 384
 385 sub main'function_end
 386         {
 387         local($func)=@_;
 388
 389         $func=$under.$func;
 390
 391         local($tmp)=<<"EOF";
 392         popl    %edi
 393         popl    %esi
 394         popl    %ebx
 395         popl    %ebp
 396         ret
 397 .L_${func}_end:
 398 EOF
 399         push(@out,$tmp);
 400
 401         if ($main'cpp)
 402                 { push(@out,"SIZE($func,.L_${func}_end-$func)\n"); }
 403         elsif ($main'coff or $main'aout)
 404                 { $tmp=push(@out,".align $align\n"); }
 405         else    { push(@out,".size\t$func,.L_${func}_end-$func\n"); }
 406         push(@out,".ident       \"$func\"\n");
 407         $stack=0;
 408         %label=();
 409         }
 410
 411 sub main'function_end_A
 412         {
 413         local($func)=@_;
 414
 415         local($tmp)=<<"EOF";
 416         popl    %edi
 417         popl    %esi
 418         popl    %ebx
 419         popl    %ebp
 420         ret
 421 EOF
 422         push(@out,$tmp);
 423         }
 424
 425 sub main'function_end_B
 426         {
 427         local($func)=@_;
 428
 429         $func=$under.$func;
 430
 431         push(@out,".L_${func}_end:\n");
 432         if ($main'cpp)
 433                 { push(@out,"SIZE($func,.L_${func}_end-$func)\n"); }
 434         elsif ($main'coff or $main'aout)
 435                 { push(@out,".align $align\n"); }
 436         else    { push(@out,".size\t$func,.L_${func}_end-$func\n"); }
 437         push(@out,".ident       \"$func\"\n");
 438         $stack=0;
 439         %label=();
 440         }
 441
 442 sub main'wparam
 443         {
 444         local($num)=@_;
 445
 446         return(&main'DWP($stack+$num*4,"esp","",0));
 447         }
 448
 449 sub main'stack_push
 450         {
 451         local($num)=@_;
 452         $stack+=$num*4;
 453         &main'sub("esp",$num*4);
 454         }
 455
 456 sub main'stack_pop
 457         {
 458         local($num)=@_;
 459         $stack-=$num*4;
 460         &main'add("esp",$num*4);
 461         }
 462
 463 sub main'swtmp
 464         {
 465         return(&main'DWP($_[0]*4,"esp","",0));
 466         }
 467
 468 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 469 #sub main'wtmp
 470 #       {
 471 #       local($num)=@_;
 472 #
 473 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 474 #       }
 475
 476 sub main'comment
 477         {
 478         return if (!defined($com_start);
 479         if ($main'elf)  # GNU and SVR4 as'es use different comment delimiters,
 480                 {       # so we just skip comments...
 481                 push(@out,"\n");
 482                 return;
 483                 }
 484         foreach (@_)
 485                 {
 486                 if (/^\s*$/)
 487                         { push(@out,"\n"); }
 488                 else
 489                         { push(@out,"\t$com_start $_ $com_end\n"); }
 490                 }
 491         }
 492
 493 sub main'label
 494         {
 495         if (!defined($label{$_[0]}))
 496                 {
 497                 $label{$_[0]}=".${label}${_[0]}";
 498                 $label++;
 499                 }
 500         return($label{$_[0]});
 501         }
 502
 503 sub main'set_label
 504         {
 505         if (!defined($label{$_[0]}))
 506                 {
 507                 $label{$_[0]}=".${label}${_[0]}";
 508                 $label++;
 509                 }
 510         push(@out,".align $align\n") if ($_[1] != 0);
 511         push(@out,"$label{$_[0]}:\n");
 512         }
 513
 514 sub main'file_end
 515         {
 516         # try to detect if SSE2 or MMX extensions were used on ELF platform...
 517         if ($main'elf && grep {/%[x]*mm[0-7]/i} @out) {
 518                 local($tmp);
 519
 520                 push (@out,"\n.comm\t".$under."OPENSSL_ia32cap,8,4\n");
 521
 522                 push (@out,".section\t.init\n");
 523                 # One can argue that it's wasteful to craft every
 524                 # SSE/MMX module with this snippet... Well, it's 72
 525                 # bytes long and for the moment we have two modules.
 526                 # Let's argue when we have 7 modules or so...
 527                 #
 528                 # $1<<10 sets a reserved bit to signal that variable
 529                 # was initialized already...
 530                 &main'picmeup("edx","OPENSSL_ia32cap");
 531                 $tmp=<<___;
 532                 cmpl    \$0,(%edx)
 533                 jne     1f
 534                 movl    \$1<<10,(%edx)
 535                 pushf
 536                 popl    %eax
 537                 movl    %eax,%ecx
 538                 xorl    \$1<<21,%eax
 539                 pushl   %eax
 540                 popf
 541                 pushf
 542                 popl    %eax
 543                 xorl    %ecx,%eax
 544                 bt      \$21,%eax
 545                 jnc     1f
 546                 pushl   %edi
 547                 pushl   %ebx
 548                 movl    %edx,%edi
 549                 movl    \$1,%eax
 550                 .word   0xa20f
 551                 orl     \$1<<10,%edx
 552                 movl    %edx,0(%edi)
 553                 movl    %ecx,4(%edi)
 554                 popl    %ebx
 555                 popl    %edi
 556         .align  4
 557         1:
 558 ___
 559                 push (@out,$tmp);
 560         }
 561
 562         if ($const ne "")
 563                 {
 564                 push(@out,".section .rodata\n");
 565                 push(@out,$const);
 566                 $const="";
 567                 }
 568         }
 569
 570 sub main'data_word
 571         {
 572         push(@out,"\t.long\t".join(',',@_)."\n");
 573         }
 574
 575 sub main'align
 576         {
 577         my $val=$_[0],$p2,$i;
 578         if ($main'aout) {
 579                 for ($p2=0;$val!=0;$val>>=1) { $p2++; }
 580                 $val=$p2-1;
 581                 $val.=",0x90";
 582         }
 583         push(@out,".align $val\n");
 584         }
 585
 586 # debug output functions: puts, putx, printf
 587
 588 sub main'puts
 589         {
 590         &pushvars();
 591         &main'push('$Lstring' . ++$constl);
 592         &main'call('puts');
 593         $stack-=4;
 594         &main'add("esp",4);
 595         &popvars();
 596
 597         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 598         }
 599
 600 sub main'putx
 601         {
 602         &pushvars();
 603         &main'push($_[0]);
 604         &main'push('$Lstring' . ++$constl);
 605         &main'call('printf');
 606         &main'add("esp",8);
 607         $stack-=8;
 608         &popvars();
 609
 610         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 611         }
 612
 613 sub main'printf
 614         {
 615         $ostack = $stack;
 616         &pushvars();
 617         for ($i = @_ - 1; $i >= 0; $i--)
 618                 {
 619                 if ($i == 0) # change this to support %s format strings
 620                         {
 621                         &main'push('$Lstring' . ++$constl);
 622                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
 623                         }
 624                 else
 625                         {
 626                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
 627                                 {
 628                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
 629                                 }
 630                         else
 631                                 {
 632                                 &main'push($_[$i]);
 633                                 }
 634                         }
 635                 }
 636         &main'call('printf');
 637         $stack-=4*@_;
 638         &main'add("esp",4*@_);
 639         &popvars();
 640         }
 641
 642 sub pushvars
 643         {
 644         &main'pushf();
 645         &main'push("edx");
 646         &main'push("ecx");
 647         &main'push("eax");
 648         }
 649
 650 sub popvars
 651         {
 652         &main'pop("eax");
 653         &main'pop("ecx");
 654         &main'pop("edx");
 655         &main'popf();
 656         }
 657
 658 sub main'picmeup
 659         {
 660         local($dst,$sym)=@_;
 661         if ($main'cpp)
 662                 {
 663                 local($tmp)=<<___;
 664 #if (defined(ELF) || defined(SOL)) && defined(PIC)
 665         .align  4
 666         call    1f
 667 1:      popl    $regs{$dst}
 668         addl    \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
 669         movl    $sym\@GOT($regs{$dst}),$regs{$dst}
 670 #else
 671         leal    $sym,$regs{$dst}
 672 #endif
 673 ___
 674                 push(@out,$tmp);
 675                 }
 676         elsif ($main'pic && ($main'elf || $main'aout))
 677                 {
 678                 &main'call(&main'label("PIC_me_up"));
 679                 &main'set_label("PIC_me_up");
 680                 &main'blindpop($dst);
 681                 &main'add($dst,"\$$under"."_GLOBAL_OFFSET_TABLE_+[.-".
 682                                 &main'label("PIC_me_up") . "]");
 683                 &main'mov($dst,&main'DWP($sym."\@GOT",$dst));
 684                 }
 685         else
 686                 {
 687                 &main'lea($dst,&main'DWP($sym));
 688                 }
 689         }
 690
 691 sub main'blindpop { &out1("popl",@_); }
 692
 693 sub main'initseg
 694         {
 695         local($f)=@_;
 696         if ($main'elf)
 697                 {
 698                 local($tmp)=<<___;
 699 .pushsection    .init
 700         call    $under$f
 701 .popsection
 702 ___
 703                 push(@out,$tmp);
 704                 }
 705         }