crypto/openssl/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($ret);
 154 #       }
 155
 156 sub main'mov    { &out2("movl",@_); }
 157 sub main'movb   { &out2("movb",@_); }
 158 sub main'and    { &out2("andl",@_); }
 159 sub main'or     { &out2("orl",@_); }
 160 sub main'shl    { &out2("sall",@_); }
 161 sub main'shr    { &out2("shrl",@_); }
 162 sub main'xor    { &out2("xorl",@_); }
 163 sub main'xorb   { &out2("xorb",@_); }
 164 sub main'add    { &out2($_[0]=~/%[a-d][lh]/?"addb":"addl",@_); }
 165 sub main'adc    { &out2("adcl",@_); }
 166 sub main'sub    { &out2("subl",@_); }
 167 sub main'sbb    { &out2("sbbl",@_); }
 168 sub main'rotl   { &out2("roll",@_); }
 169 sub main'rotr   { &out2("rorl",@_); }
 170 sub main'exch   { &out2($_[0]=~/%[a-d][lh]/?"xchgb":"xchgl",@_); }
 171 sub main'cmp    { &out2("cmpl",@_); }
 172 sub main'lea    { &out2("leal",@_); }
 173 sub main'mul    { &out1("mull",@_); }
 174 sub main'imul   { &out2("imull",@_); }
 175 sub main'div    { &out1("divl",@_); }
 176 sub main'jmp    { &out1("jmp",@_); }
 177 sub main'jmp_ptr { &out1p("jmp",@_); }
 178 sub main'je     { &out1("je",@_); }
 179 sub main'jle    { &out1("jle",@_); }
 180 sub main'jne    { &out1("jne",@_); }
 181 sub main'jnz    { &out1("jnz",@_); }
 182 sub main'jz     { &out1("jz",@_); }
 183 sub main'jge    { &out1("jge",@_); }
 184 sub main'jl     { &out1("jl",@_); }
 185 sub main'ja     { &out1("ja",@_); }
 186 sub main'jae    { &out1("jae",@_); }
 187 sub main'jb     { &out1("jb",@_); }
 188 sub main'jbe    { &out1("jbe",@_); }
 189 sub main'jc     { &out1("jc",@_); }
 190 sub main'jnc    { &out1("jnc",@_); }
 191 sub main'jno    { &out1("jno",@_); }
 192 sub main'dec    { &out1("decl",@_); }
 193 sub main'inc    { &out1($_[0]=~/%[a-d][hl]/?"incb":"incl",@_); }
 194 sub main'push   { &out1("pushl",@_); $stack+=4; }
 195 sub main'pop    { &out1("popl",@_); $stack-=4; }
 196 sub main'pushf  { &out0("pushfl"); $stack+=4; }
 197 sub main'popf   { &out0("popfl"); $stack-=4; }
 198 sub main'not    { &out1("notl",@_); }
 199 sub main'call   {       my $pre=$under;
 200                         foreach $i (%label)
 201                         { if ($label{$i} eq $_[0]) { $pre=''; last; } }
 202                         &out1("call",$pre.$_[0]);
 203                 }
 204 sub main'call_ptr { &out1p("call",@_); }
 205 sub main'ret    { &out0("ret"); }
 206 sub main'nop    { &out0("nop"); }
 207 sub main'test   { &out2("testl",@_); }
 208 sub main'bt     { &out2("btl",@_); }
 209 sub main'leave  { &out0("leave"); }
 210 sub main'cpuid  { &out0(".byte\t0x0f,0xa2"); }
 211 sub main'rdtsc  { &out0(".byte\t0x0f,0x31"); }
 212 sub main'halt   { &out0("hlt"); }
 213 sub main'movz   { &out2("movzbl",@_); }
 214 sub main'neg    { &out1("negl",@_); }
 215 sub main'cld    { &out0("cld"); }
 216
 217 # SSE2
 218 sub main'emms   { &out0("emms"); }
 219 sub main'movd   { &out2("movd",@_); }
 220 sub main'movdqu { &out2("movdqu",@_); }
 221 sub main'movdqa { &out2("movdqa",@_); }
 222 sub main'movdq2q{ &out2("movdq2q",@_); }
 223 sub main'movq2dq{ &out2("movq2dq",@_); }
 224 sub main'paddq  { &out2("paddq",@_); }
 225 sub main'pmuludq{ &out2("pmuludq",@_); }
 226 sub main'psrlq  { &out2("psrlq",@_); }
 227 sub main'psllq  { &out2("psllq",@_); }
 228 sub main'pxor   { &out2("pxor",@_); }
 229 sub main'por    { &out2("por",@_); }
 230 sub main'pand   { &out2("pand",@_); }
 231 sub main'movq   {
 232         local($p1,$p2,$optimize)=@_;
 233         if ($optimize && $p1=~/^mm[0-7]$/ && $p2=~/^mm[0-7]$/)
 234                 # movq between mmx registers can sink Intel CPUs
 235                 {       push(@out,"\tpshufw\t\$0xe4,%$p2,%$p1\n");      }
 236         else    {       &out2("movq",@_);                               }
 237         }
 238
 239 # The bswapl instruction is new for the 486. Emulate if i386.
 240 sub main'bswap
 241         {
 242         if ($main'i386)
 243                 {
 244                 &main'comment("bswapl @_");
 245                 &main'exch(main'HB(@_),main'LB(@_));
 246                 &main'rotr(@_,16);
 247                 &main'exch(main'HB(@_),main'LB(@_));
 248                 }
 249         else
 250                 {
 251                 &out1("bswapl",@_);
 252                 }
 253         }
 254
 255 sub out2
 256         {
 257         local($name,$p1,$p2)=@_;
 258         local($l,$ll,$t);
 259         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 260                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 261                                 "shll",0xD1E0,"shrl",0xD1E8,
 262                                 "sarl",0xD1F8);
 263
 264         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 265                 {
 266                 $op=$special{$name}|$reg_val{$p1};
 267                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 268                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 269                 push(@out,$tmp1);
 270                 push(@out,$tmp2);
 271
 272                 $p2=&conv($p2);
 273                 $p1=&conv($p1);
 274                 &main'comment("$name $p2 $p1");
 275                 return;
 276                 }
 277
 278         push(@out,"\t$name\t");
 279         $t=&conv($p2).",";
 280         $l=length($t);
 281         push(@out,$t);
 282         $ll=4-($l+9)/8;
 283         $tmp1=sprintf("\t" x $ll);
 284         push(@out,$tmp1);
 285         push(@out,&conv($p1)."\n");
 286         }
 287
 288 sub out1
 289         {
 290         local($name,$p1)=@_;
 291         local($l,$t);
 292         local(%special)=("bswapl",0x0FC8);
 293
 294         if ((defined($special{$name})) && defined($regs{$p1}))
 295                 {
 296                 $op=$special{$name}|$reg_val{$p1};
 297                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 298                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 299                 push(@out,$tmp1);
 300                 push(@out,$tmp2);
 301
 302                 $p2=&conv($p2);
 303                 $p1=&conv($p1);
 304                 &main'comment("$name $p2 $p1");
 305                 return;
 306                 }
 307
 308         push(@out,"\t$name\t".&conv($p1)."\n");
 309         }
 310
 311 sub out1p
 312         {
 313         local($name,$p1)=@_;
 314         local($l,$t);
 315
 316         push(@out,"\t$name\t*".&conv($p1)."\n");
 317         }
 318
 319 sub out0
 320         {
 321         push(@out,"\t$_[0]\n");
 322         }
 323
 324 sub conv
 325         {
 326         local($p)=@_;
 327
 328 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 329
 330         $p=$regs{$p} if (defined($regs{$p}));
 331
 332         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 333         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 334         return $p;
 335         }
 336
 337 sub main'file
 338         {
 339         local($file)=@_;
 340
 341         local($tmp)=<<"EOF";
 342         .file   "$file.s"
 343 EOF
 344         push(@out,$tmp);
 345         }
 346
 347 sub main'function_begin
 348         {
 349         local($func)=@_;
 350
 351         &main'external_label($func);
 352         $func=$under.$func;
 353
 354         local($tmp)=<<"EOF";
 355 .text
 356 .globl  $func
 357 EOF
 358         push(@out,$tmp);
 359         if ($main'cpp)
 360                 { $tmp=push(@out,"TYPE($func,\@function)\n"); }
 361         elsif ($main'coff)
 362                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 363         elsif ($main'aout and !$main'pic)
 364                 { }
 365         else    { $tmp=push(@out,".type\t$func,\@function\n"); }
 366         push(@out,".align\t$align\n");
 367         push(@out,"$func:\n");
 368         $tmp=<<"EOF";
 369         pushl   %ebp
 370         pushl   %ebx
 371         pushl   %esi
 372         pushl   %edi
 373
 374 EOF
 375         push(@out,$tmp);
 376         $stack=20;
 377         }
 378
 379 sub main'function_begin_B
 380         {
 381         local($func,$extra)=@_;
 382
 383         &main'external_label($func);
 384         $func=$under.$func;
 385
 386         local($tmp)=<<"EOF";
 387 .text
 388 .globl  $func
 389 EOF
 390         push(@out,$tmp);
 391         if ($main'cpp)
 392                 { push(@out,"TYPE($func,\@function)\n"); }
 393         elsif ($main'coff)
 394                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 395         elsif ($main'aout and !$main'pic)
 396                 { }
 397         else    { push(@out,".type      $func,\@function\n"); }
 398         push(@out,".align\t$align\n");
 399         push(@out,"$func:\n");
 400         $stack=4;
 401         }
 402
 403 sub main'function_end
 404         {
 405         local($func)=@_;
 406
 407         $func=$under.$func;
 408
 409         local($tmp)=<<"EOF";
 410         popl    %edi
 411         popl    %esi
 412         popl    %ebx
 413         popl    %ebp
 414         ret
 415 ${dot}L_${func}_end:
 416 EOF
 417         push(@out,$tmp);
 418
 419         if ($main'cpp)
 420                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 421         elsif ($main'coff or $main'aout)
 422                 { }
 423         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 424         push(@out,".ident       \"$func\"\n");
 425         $stack=0;
 426         %label=();
 427         }
 428
 429 sub main'function_end_A
 430         {
 431         local($func)=@_;
 432
 433         local($tmp)=<<"EOF";
 434         popl    %edi
 435         popl    %esi
 436         popl    %ebx
 437         popl    %ebp
 438         ret
 439 EOF
 440         push(@out,$tmp);
 441         }
 442
 443 sub main'function_end_B
 444         {
 445         local($func)=@_;
 446
 447         $func=$under.$func;
 448
 449         push(@out,"${dot}L_${func}_end:\n");
 450         if ($main'cpp)
 451                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 452         elsif ($main'coff or $main'aout)
 453                 { }
 454         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 455         push(@out,".ident       \"$func\"\n");
 456         $stack=0;
 457         %label=();
 458         }
 459
 460 sub main'wparam
 461         {
 462         local($num)=@_;
 463
 464         return(&main'DWP($stack+$num*4,"esp","",0));
 465         }
 466
 467 sub main'stack_push
 468         {
 469         local($num)=@_;
 470         $stack+=$num*4;
 471         &main'sub("esp",$num*4);
 472         }
 473
 474 sub main'stack_pop
 475         {
 476         local($num)=@_;
 477         $stack-=$num*4;
 478         &main'add("esp",$num*4);
 479         }
 480
 481 sub main'swtmp
 482         {
 483         return(&main'DWP($_[0]*4,"esp","",0));
 484         }
 485
 486 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 487 #sub main'wtmp
 488 #       {
 489 #       local($num)=@_;
 490 #
 491 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 492 #       }
 493
 494 sub main'comment
 495         {
 496         if (!defined($com_start) or $main'elf)
 497                 {       # Regarding $main'elf above...
 498                         # GNU and SVR4 as'es use different comment delimiters,
 499                 push(@out,"\n");        # so we just skip ELF comments...
 500                 return;
 501                 }
 502         foreach (@_)
 503                 {
 504                 if (/^\s*$/)
 505                         { push(@out,"\n"); }
 506                 else
 507                         { push(@out,"\t$com_start $_ $com_end\n"); }
 508                 }
 509         }
 510
 511 sub main'public_label
 512         {
 513         $label{$_[0]}="${under}${_[0]}" if (!defined($label{$_[0]}));
 514         push(@out,".globl\t$label{$_[0]}\n");
 515         }
 516
 517 sub main'label
 518         {
 519         if (!defined($label{$_[0]}))
 520                 {
 521                 $label{$_[0]}="${dot}${label}${_[0]}";
 522                 $label++;
 523                 }
 524         return($label{$_[0]});
 525         }
 526
 527 sub main'set_label
 528         {
 529         if (!defined($label{$_[0]}))
 530                 {
 531                 $label{$_[0]}="${dot}${label}${_[0]}";
 532                 $label++;
 533                 }
 534         if ($_[1]!=0)
 535                 {
 536                 if ($_[1]>1)    { main'align($_[1]);            }
 537                 else            { push(@out,".align $align\n"); }
 538                 }
 539         push(@out,"$label{$_[0]}:\n");
 540         }
 541
 542 sub main'file_end
 543         {
 544         # try to detect if SSE2 or MMX extensions were used on ELF platform...
 545         if ($main'elf && grep {/\b%[x]*mm[0-7]\b|OPENSSL_ia32cap_P\b/i} @out) {
 546                 local($tmp);
 547
 548                 push (@out,"\n.section\t.bss\n");
 549                 push (@out,".comm\t${under}OPENSSL_ia32cap_P,4,4\n");
 550
 551                 return;
 552         }
 553
 554         if ($const ne "")
 555                 {
 556                 push(@out,".section .rodata\n");
 557                 push(@out,$const);
 558                 $const="";
 559                 }
 560         }
 561
 562 sub main'data_byte
 563         {
 564         push(@out,"\t.byte\t".join(',',@_)."\n");
 565         }
 566
 567 sub main'data_word
 568         {
 569         push(@out,"\t.long\t".join(',',@_)."\n");
 570         }
 571
 572 sub main'align
 573         {
 574         my $val=$_[0],$p2,$i;
 575         if ($main'aout) {
 576                 for ($p2=0;$val!=0;$val>>=1) { $p2++; }
 577                 $val=$p2-1;
 578                 $val.=",0x90";
 579         }
 580         push(@out,".align\t$val\n");
 581         }
 582
 583 # debug output functions: puts, putx, printf
 584
 585 sub main'puts
 586         {
 587         &pushvars();
 588         &main'push('$Lstring' . ++$constl);
 589         &main'call('puts');
 590         $stack-=4;
 591         &main'add("esp",4);
 592         &popvars();
 593
 594         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 595         }
 596
 597 sub main'putx
 598         {
 599         &pushvars();
 600         &main'push($_[0]);
 601         &main'push('$Lstring' . ++$constl);
 602         &main'call('printf');
 603         &main'add("esp",8);
 604         $stack-=8;
 605         &popvars();
 606
 607         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 608         }
 609
 610 sub main'printf
 611         {
 612         $ostack = $stack;
 613         &pushvars();
 614         for ($i = @_ - 1; $i >= 0; $i--)
 615                 {
 616                 if ($i == 0) # change this to support %s format strings
 617                         {
 618                         &main'push('$Lstring' . ++$constl);
 619                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
 620                         }
 621                 else
 622                         {
 623                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
 624                                 {
 625                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
 626                                 }
 627                         else
 628                                 {
 629                                 &main'push($_[$i]);
 630                                 }
 631                         }
 632                 }
 633         &main'call('printf');
 634         $stack-=4*@_;
 635         &main'add("esp",4*@_);
 636         &popvars();
 637         }
 638
 639 sub pushvars
 640         {
 641         &main'pushf();
 642         &main'push("edx");
 643         &main'push("ecx");
 644         &main'push("eax");
 645         }
 646
 647 sub popvars
 648         {
 649         &main'pop("eax");
 650         &main'pop("ecx");
 651         &main'pop("edx");
 652         &main'popf();
 653         }
 654
 655 sub main'picmeup
 656         {
 657         local($dst,$sym)=@_;
 658         if ($main'cpp)
 659                 {
 660                 local($tmp)=<<___;
 661 #if (defined(ELF) || defined(SOL)) && defined(PIC)
 662         call    1f
 663 1:      popl    $regs{$dst}
 664         addl    \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
 665         movl    $sym\@GOT($regs{$dst}),$regs{$dst}
 666 #else
 667         leal    $sym,$regs{$dst}
 668 #endif
 669 ___
 670                 push(@out,$tmp);
 671                 }
 672         elsif ($main'pic && ($main'elf || $main'aout))
 673                 {
 674                 &main'call(&main'label("PIC_me_up"));
 675                 &main'set_label("PIC_me_up");
 676                 &main'blindpop($dst);
 677                 &main'add($dst,"\$${under}_GLOBAL_OFFSET_TABLE_+[.-".
 678                                 &main'label("PIC_me_up") . "]");
 679                 &main'mov($dst,&main'DWP($under.$sym."\@GOT",$dst));
 680                 }
 681         else
 682                 {
 683                 &main'lea($dst,&main'DWP($sym));
 684                 }
 685         }
 686
 687 sub main'blindpop { &out1("popl",@_); }
 688
 689 sub main'initseg
 690         {
 691         local($f)=@_;
 692         local($tmp);
 693         if ($main'elf)
 694                 {
 695                 $tmp=<<___;
 696 .section        .init
 697         call    $under$f
 698         jmp     .Linitalign
 699 .align  $align
 700 .Linitalign:
 701 ___
 702                 }
 703         elsif ($main'coff)
 704                 {
 705                 $tmp=<<___;     # applies to both Cygwin and Mingw
 706 .section        .ctors
 707 .long   $under$f
 708 ___
 709                 }
 710         elsif ($main'aout)
 711                 {
 712                 local($ctor)="${under}_GLOBAL_\$I\$$f";
 713                 $tmp=".text\n";
 714                 $tmp.=".type    $ctor,\@function\n" if ($main'pic);
 715                 $tmp.=<<___;    # OpenBSD way...
 716 .globl  $ctor
 717 .align  2
 718 $ctor:
 719         jmp     $under$f
 720 ___
 721                 }
 722         push(@out,$tmp) if ($tmp);
 723         }
 724
 725 1;