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   {       my $pre=$under;
 198                         foreach $i (%label)
 199                         { if ($label{$i} eq $_[0]) { $pre=''; last; } }
 200                         &out1("call",$pre.$_[0]);
 201                 }
 202 sub main'ret    { &out0("ret"); }
 203 sub main'nop    { &out0("nop"); }
 204 sub main'test   { &out2("testl",@_); }
 205 sub main'bt     { &out2("btl",@_); }
 206 sub main'leave  { &out0("leave"); }
 207 sub main'cpuid  { &out0(".word\t0xa20f"); }
 208 sub main'rdtsc  { &out0(".word\t0x310f"); }
 209
 210 # SSE2
 211 sub main'emms   { &out0("emms"); }
 212 sub main'movd   { &out2("movd",@_); }
 213 sub main'movq   { &out2("movq",@_); }
 214 sub main'movdqu { &out2("movdqu",@_); }
 215 sub main'movdqa { &out2("movdqa",@_); }
 216 sub main'movdq2q{ &out2("movdq2q",@_); }
 217 sub main'movq2dq{ &out2("movq2dq",@_); }
 218 sub main'paddq  { &out2("paddq",@_); }
 219 sub main'pmuludq{ &out2("pmuludq",@_); }
 220 sub main'psrlq  { &out2("psrlq",@_); }
 221 sub main'psllq  { &out2("psllq",@_); }
 222 sub main'pxor   { &out2("pxor",@_); }
 223 sub main'por    { &out2("por",@_); }
 224 sub main'pand   { &out2("pand",@_); }
 225
 226 # The bswapl instruction is new for the 486. Emulate if i386.
 227 sub main'bswap
 228         {
 229         if ($main'i386)
 230                 {
 231                 &main'comment("bswapl @_");
 232                 &main'exch(main'HB(@_),main'LB(@_));
 233                 &main'rotr(@_,16);
 234                 &main'exch(main'HB(@_),main'LB(@_));
 235                 }
 236         else
 237                 {
 238                 &out1("bswapl",@_);
 239                 }
 240         }
 241
 242 sub out2
 243         {
 244         local($name,$p1,$p2)=@_;
 245         local($l,$ll,$t);
 246         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 247                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 248                                 "shll",0xD1E0,"shrl",0xD1E8,
 249                                 "sarl",0xD1F8);
 250
 251         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 252                 {
 253                 $op=$special{$name}|$reg_val{$p1};
 254                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 255                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 256                 push(@out,$tmp1);
 257                 push(@out,$tmp2);
 258
 259                 $p2=&conv($p2);
 260                 $p1=&conv($p1);
 261                 &main'comment("$name $p2 $p1");
 262                 return;
 263                 }
 264
 265         push(@out,"\t$name\t");
 266         $t=&conv($p2).",";
 267         $l=length($t);
 268         push(@out,$t);
 269         $ll=4-($l+9)/8;
 270         $tmp1=sprintf("\t" x $ll);
 271         push(@out,$tmp1);
 272         push(@out,&conv($p1)."\n");
 273         }
 274
 275 sub out1
 276         {
 277         local($name,$p1)=@_;
 278         local($l,$t);
 279         local(%special)=("bswapl",0x0FC8);
 280
 281         if ((defined($special{$name})) && defined($regs{$p1}))
 282                 {
 283                 $op=$special{$name}|$reg_val{$p1};
 284                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 285                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 286                 push(@out,$tmp1);
 287                 push(@out,$tmp2);
 288
 289                 $p2=&conv($p2);
 290                 $p1=&conv($p1);
 291                 &main'comment("$name $p2 $p1");
 292                 return;
 293                 }
 294
 295         push(@out,"\t$name\t".&conv($p1)."\n");
 296         }
 297
 298 sub out1p
 299         {
 300         local($name,$p1)=@_;
 301         local($l,$t);
 302
 303         push(@out,"\t$name\t*".&conv($p1)."\n");
 304         }
 305
 306 sub out0
 307         {
 308         push(@out,"\t$_[0]\n");
 309         }
 310
 311 sub conv
 312         {
 313         local($p)=@_;
 314
 315 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 316
 317         $p=$regs{$p} if (defined($regs{$p}));
 318
 319         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 320         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 321         return $p;
 322         }
 323
 324 sub main'file
 325         {
 326         local($file)=@_;
 327
 328         local($tmp)=<<"EOF";
 329         .file   "$file.s"
 330 EOF
 331         push(@out,$tmp);
 332         }
 333
 334 sub main'function_begin
 335         {
 336         local($func)=@_;
 337
 338         &main'external_label($func);
 339         $func=$under.$func;
 340
 341         local($tmp)=<<"EOF";
 342 .text
 343 .globl  $func
 344 EOF
 345         push(@out,$tmp);
 346         if ($main'cpp)
 347                 { $tmp=push(@out,"TYPE($func,\@function)\n"); }
 348         elsif ($main'coff)
 349                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 350         elsif ($main'aout and !$main'pic)
 351                 { }
 352         else    { $tmp=push(@out,".type\t$func,\@function\n"); }
 353         push(@out,".align\t$align\n");
 354         push(@out,"$func:\n");
 355         $tmp=<<"EOF";
 356         pushl   %ebp
 357         pushl   %ebx
 358         pushl   %esi
 359         pushl   %edi
 360
 361 EOF
 362         push(@out,$tmp);
 363         $stack=20;
 364         }
 365
 366 sub main'function_begin_B
 367         {
 368         local($func,$extra)=@_;
 369
 370         &main'external_label($func);
 371         $func=$under.$func;
 372
 373         local($tmp)=<<"EOF";
 374 .text
 375 .globl  $func
 376 EOF
 377         push(@out,$tmp);
 378         if ($main'cpp)
 379                 { push(@out,"TYPE($func,\@function)\n"); }
 380         elsif ($main'coff)
 381                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 382         elsif ($main'aout and !$main'pic)
 383                 { }
 384         else    { push(@out,".type      $func,\@function\n"); }
 385         push(@out,".align\t$align\n");
 386         push(@out,"$func:\n");
 387         $stack=4;
 388         }
 389
 390 sub main'function_end
 391         {
 392         local($func)=@_;
 393
 394         $func=$under.$func;
 395
 396         local($tmp)=<<"EOF";
 397         popl    %edi
 398         popl    %esi
 399         popl    %ebx
 400         popl    %ebp
 401         ret
 402 ${dot}L_${func}_end:
 403 EOF
 404         push(@out,$tmp);
 405
 406         if ($main'cpp)
 407                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 408         elsif ($main'coff or $main'aout)
 409                 { }
 410         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 411         push(@out,".ident       \"$func\"\n");
 412         $stack=0;
 413         %label=();
 414         }
 415
 416 sub main'function_end_A
 417         {
 418         local($func)=@_;
 419
 420         local($tmp)=<<"EOF";
 421         popl    %edi
 422         popl    %esi
 423         popl    %ebx
 424         popl    %ebp
 425         ret
 426 EOF
 427         push(@out,$tmp);
 428         }
 429
 430 sub main'function_end_B
 431         {
 432         local($func)=@_;
 433
 434         $func=$under.$func;
 435
 436         push(@out,"${dot}L_${func}_end:\n");
 437         if ($main'cpp)
 438                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 439         elsif ($main'coff or $main'aout)
 440                 { }
 441         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 442         push(@out,".ident       \"$func\"\n");
 443         $stack=0;
 444         %label=();
 445         }
 446
 447 sub main'wparam
 448         {
 449         local($num)=@_;
 450
 451         return(&main'DWP($stack+$num*4,"esp","",0));
 452         }
 453
 454 sub main'stack_push
 455         {
 456         local($num)=@_;
 457         $stack+=$num*4;
 458         &main'sub("esp",$num*4);
 459         }
 460
 461 sub main'stack_pop
 462         {
 463         local($num)=@_;
 464         $stack-=$num*4;
 465         &main'add("esp",$num*4);
 466         }
 467
 468 sub main'swtmp
 469         {
 470         return(&main'DWP($_[0]*4,"esp","",0));
 471         }
 472
 473 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 474 #sub main'wtmp
 475 #       {
 476 #       local($num)=@_;
 477 #
 478 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 479 #       }
 480
 481 sub main'comment
 482         {
 483         if (!defined($com_start) or $main'elf)
 484                 {       # Regarding $main'elf above...
 485                         # GNU and SVR4 as'es use different comment delimiters,
 486                 push(@out,"\n");        # so we just skip ELF comments...
 487                 return;
 488                 }
 489         foreach (@_)
 490                 {
 491                 if (/^\s*$/)
 492                         { push(@out,"\n"); }
 493                 else
 494                         { push(@out,"\t$com_start $_ $com_end\n"); }
 495                 }
 496         }
 497
 498 sub main'label
 499         {
 500         if (!defined($label{$_[0]}))
 501                 {
 502                 $label{$_[0]}="${dot}${label}${_[0]}";
 503                 $label++;
 504                 }
 505         return($label{$_[0]});
 506         }
 507
 508 sub main'set_label
 509         {
 510         if (!defined($label{$_[0]}))
 511                 {
 512                 $label{$_[0]}="${dot}${label}${_[0]}";
 513                 $label++;
 514                 }
 515         if ($_[1]!=0)
 516                 {
 517                 if ($_[1]>1)    { main'align($_[1]);            }
 518                 else            { push(@out,".align $align\n"); }
 519                 }
 520         push(@out,"$label{$_[0]}:\n");
 521         }
 522
 523 sub main'file_end
 524         {
 525         # try to detect if SSE2 or MMX extensions were used on ELF platform...
 526         if ($main'elf && grep {/%[x]*mm[0-7]/i} @out) {
 527                 local($tmp);
 528
 529                 push (@out,"\n.comm\t${under}OPENSSL_ia32cap_P,4,4\n");
 530
 531                 push (@out,".section\t.init\n");
 532                 # One can argue that it's wasteful to craft every
 533                 # SSE/MMX module with this snippet... Well, it's 72
 534                 # bytes long and for the moment we have two modules.
 535                 # Let's argue when we have 7 modules or so...
 536                 #
 537                 # $1<<10 sets a reserved bit to signal that variable
 538                 # was initialized already...
 539                 &main'picmeup("edx","OPENSSL_ia32cap_P");
 540                 $tmp=<<___;
 541                 cmpl    \$0,(%edx)
 542                 jne     1f
 543                 movl    \$1<<10,(%edx)
 544                 pushf
 545                 popl    %eax
 546                 movl    %eax,%ecx
 547                 xorl    \$1<<21,%eax
 548                 pushl   %eax
 549                 popf
 550                 pushf
 551                 popl    %eax
 552                 xorl    %ecx,%eax
 553                 bt      \$21,%eax
 554                 jnc     1f
 555                 pushl   %edi
 556                 pushl   %ebx
 557                 movl    %edx,%edi
 558                 movl    \$1,%eax
 559                 .word   0xa20f
 560                 orl     \$1<<10,%edx
 561                 movl    %edx,0(%edi)
 562                 popl    %ebx
 563                 popl    %edi
 564         .align  4
 565         1:
 566 ___
 567                 push (@out,$tmp);
 568         }
 569
 570         if ($const ne "")
 571                 {
 572                 push(@out,".section .rodata\n");
 573                 push(@out,$const);
 574                 $const="";
 575                 }
 576         }
 577
 578 sub main'data_word
 579         {
 580         push(@out,"\t.long\t".join(',',@_)."\n");
 581         }
 582
 583 sub main'align
 584         {
 585         my $val=$_[0],$p2,$i;
 586         if ($main'aout) {
 587                 for ($p2=0;$val!=0;$val>>=1) { $p2++; }
 588                 $val=$p2-1;
 589                 $val.=",0x90";
 590         }
 591         push(@out,".align\t$val\n");
 592         }
 593
 594 # debug output functions: puts, putx, printf
 595
 596 sub main'puts
 597         {
 598         &pushvars();
 599         &main'push('$Lstring' . ++$constl);
 600         &main'call('puts');
 601         $stack-=4;
 602         &main'add("esp",4);
 603         &popvars();
 604
 605         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 606         }
 607
 608 sub main'putx
 609         {
 610         &pushvars();
 611         &main'push($_[0]);
 612         &main'push('$Lstring' . ++$constl);
 613         &main'call('printf');
 614         &main'add("esp",8);
 615         $stack-=8;
 616         &popvars();
 617
 618         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 619         }
 620
 621 sub main'printf
 622         {
 623         $ostack = $stack;
 624         &pushvars();
 625         for ($i = @_ - 1; $i >= 0; $i--)
 626                 {
 627                 if ($i == 0) # change this to support %s format strings
 628                         {
 629                         &main'push('$Lstring' . ++$constl);
 630                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
 631                         }
 632                 else
 633                         {
 634                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
 635                                 {
 636                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
 637                                 }
 638                         else
 639                                 {
 640                                 &main'push($_[$i]);
 641                                 }
 642                         }
 643                 }
 644         &main'call('printf');
 645         $stack-=4*@_;
 646         &main'add("esp",4*@_);
 647         &popvars();
 648         }
 649
 650 sub pushvars
 651         {
 652         &main'pushf();
 653         &main'push("edx");
 654         &main'push("ecx");
 655         &main'push("eax");
 656         }
 657
 658 sub popvars
 659         {
 660         &main'pop("eax");
 661         &main'pop("ecx");
 662         &main'pop("edx");
 663         &main'popf();
 664         }
 665
 666 sub main'picmeup
 667         {
 668         local($dst,$sym)=@_;
 669         if ($main'cpp)
 670                 {
 671                 local($tmp)=<<___;
 672 #if (defined(ELF) || defined(SOL)) && defined(PIC)
 673         call    1f
 674 1:      popl    $regs{$dst}
 675         addl    \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
 676         movl    $sym\@GOT($regs{$dst}),$regs{$dst}
 677 #else
 678         leal    $sym,$regs{$dst}
 679 #endif
 680 ___
 681                 push(@out,$tmp);
 682                 }
 683         elsif ($main'pic && ($main'elf || $main'aout))
 684                 {
 685                 &main'call(&main'label("PIC_me_up"));
 686                 &main'set_label("PIC_me_up");
 687                 &main'blindpop($dst);
 688                 &main'add($dst,"\$${under}_GLOBAL_OFFSET_TABLE_+[.-".
 689                                 &main'label("PIC_me_up") . "]");
 690                 &main'mov($dst,&main'DWP($under.$sym."\@GOT",$dst));
 691                 }
 692         else
 693                 {
 694                 &main'lea($dst,&main'DWP($sym));
 695                 }
 696         }
 697
 698 sub main'blindpop { &out1("popl",@_); }
 699
 700 sub main'initseg
 701         {
 702         local($f)=@_;
 703         local($tmp);
 704         if ($main'elf)
 705                 {
 706                 $tmp=<<___;
 707 .section        .init
 708         call    $under$f
 709 ___
 710                 }
 711         elsif ($main'coff)
 712                 {
 713                 $tmp=<<___;     # applies to both Cygwin and Mingw
 714 .section        .ctors
 715 .long   $under$f
 716 ___
 717                 }
 718         elsif ($main'aout)
 719                 {
 720                 local($ctor)="${under}_GLOBAL_\$I\$$f";
 721                 $tmp=".text\n";
 722                 $tmp.=".type    $ctor,\@function\n" if ($main'pic);
 723                 $tmp.=<<___;    # OpenBSD way...
 724 .globl  $ctor
 725 .align  2
 726 $ctor:
 727         jmp     $under$f
 728 ___
 729                 }
 730         push(@out,$tmp) if ($tmp);
 731         }
 732
 733 1;