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