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("xchg",@_); }
 171 sub main'cmp    { &out2("cmpl",@_); }
 172 sub main'lea    { &out2("leal",@_); }
 173 sub main'mul    { &out1("mull",@_); }
 174 sub main'div    { &out1("divl",@_); }
 175 sub main'jmp    { &out1("jmp",@_); }
 176 sub main'jmp_ptr { &out1p("jmp",@_); }
 177 sub main'je     { &out1("je",@_); }
 178 sub main'jle    { &out1("jle",@_); }
 179 sub main'jne    { &out1("jne",@_); }
 180 sub main'jnz    { &out1("jnz",@_); }
 181 sub main'jz     { &out1("jz",@_); }
 182 sub main'jge    { &out1("jge",@_); }
 183 sub main'jl     { &out1("jl",@_); }
 184 sub main'ja     { &out1("ja",@_); }
 185 sub main'jae    { &out1("jae",@_); }
 186 sub main'jb     { &out1("jb",@_); }
 187 sub main'jbe    { &out1("jbe",@_); }
 188 sub main'jc     { &out1("jc",@_); }
 189 sub main'jnc    { &out1("jnc",@_); }
 190 sub main'jno    { &out1("jno",@_); }
 191 sub main'dec    { &out1("decl",@_); }
 192 sub main'inc    { &out1($_[0]=~/%[a-d][hl]/?"incb":"incl",@_); }
 193 sub main'push   { &out1("pushl",@_); $stack+=4; }
 194 sub main'pop    { &out1("popl",@_); $stack-=4; }
 195 sub main'pushf  { &out0("pushfl"); $stack+=4; }
 196 sub main'popf   { &out0("popfl"); $stack-=4; }
 197 sub main'not    { &out1("notl",@_); }
 198 sub main'call   {       my $pre=$under;
 199                         foreach $i (%label)
 200                         { if ($label{$i} eq $_[0]) { $pre=''; last; } }
 201                         &out1("call",$pre.$_[0]);
 202                 }
 203 sub main'ret    { &out0("ret"); }
 204 sub main'nop    { &out0("nop"); }
 205 sub main'test   { &out2("testl",@_); }
 206 sub main'bt     { &out2("btl",@_); }
 207 sub main'leave  { &out0("leave"); }
 208 sub main'cpuid  { &out0(".byte\t0x0f,0xa2"); }
 209 sub main'rdtsc  { &out0(".byte\t0x0f,0x31"); }
 210 sub main'halt   { &out0("hlt"); }
 211 sub main'movz   { &out2("movzb",@_); }
 212
 213 # SSE2
 214 sub main'emms   { &out0("emms"); }
 215 sub main'movd   { &out2("movd",@_); }
 216 sub main'movq   { &out2("movq",@_); }
 217 sub main'movdqu { &out2("movdqu",@_); }
 218 sub main'movdqa { &out2("movdqa",@_); }
 219 sub main'movdq2q{ &out2("movdq2q",@_); }
 220 sub main'movq2dq{ &out2("movq2dq",@_); }
 221 sub main'paddq  { &out2("paddq",@_); }
 222 sub main'pmuludq{ &out2("pmuludq",@_); }
 223 sub main'psrlq  { &out2("psrlq",@_); }
 224 sub main'psllq  { &out2("psllq",@_); }
 225 sub main'pxor   { &out2("pxor",@_); }
 226 sub main'por    { &out2("por",@_); }
 227 sub main'pand   { &out2("pand",@_); }
 228
 229 # The bswapl instruction is new for the 486. Emulate if i386.
 230 sub main'bswap
 231         {
 232         if ($main'i386)
 233                 {
 234                 &main'comment("bswapl @_");
 235                 &main'exch(main'HB(@_),main'LB(@_));
 236                 &main'rotr(@_,16);
 237                 &main'exch(main'HB(@_),main'LB(@_));
 238                 }
 239         else
 240                 {
 241                 &out1("bswapl",@_);
 242                 }
 243         }
 244
 245 sub out2
 246         {
 247         local($name,$p1,$p2)=@_;
 248         local($l,$ll,$t);
 249         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 250                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 251                                 "shll",0xD1E0,"shrl",0xD1E8,
 252                                 "sarl",0xD1F8);
 253
 254         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 255                 {
 256                 $op=$special{$name}|$reg_val{$p1};
 257                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 258                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 259                 push(@out,$tmp1);
 260                 push(@out,$tmp2);
 261
 262                 $p2=&conv($p2);
 263                 $p1=&conv($p1);
 264                 &main'comment("$name $p2 $p1");
 265                 return;
 266                 }
 267
 268         push(@out,"\t$name\t");
 269         $t=&conv($p2).",";
 270         $l=length($t);
 271         push(@out,$t);
 272         $ll=4-($l+9)/8;
 273         $tmp1=sprintf("\t" x $ll);
 274         push(@out,$tmp1);
 275         push(@out,&conv($p1)."\n");
 276         }
 277
 278 sub out1
 279         {
 280         local($name,$p1)=@_;
 281         local($l,$t);
 282         local(%special)=("bswapl",0x0FC8);
 283
 284         if ((defined($special{$name})) && defined($regs{$p1}))
 285                 {
 286                 $op=$special{$name}|$reg_val{$p1};
 287                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 288                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 289                 push(@out,$tmp1);
 290                 push(@out,$tmp2);
 291
 292                 $p2=&conv($p2);
 293                 $p1=&conv($p1);
 294                 &main'comment("$name $p2 $p1");
 295                 return;
 296                 }
 297
 298         push(@out,"\t$name\t".&conv($p1)."\n");
 299         }
 300
 301 sub out1p
 302         {
 303         local($name,$p1)=@_;
 304         local($l,$t);
 305
 306         push(@out,"\t$name\t*".&conv($p1)."\n");
 307         }
 308
 309 sub out0
 310         {
 311         push(@out,"\t$_[0]\n");
 312         }
 313
 314 sub conv
 315         {
 316         local($p)=@_;
 317
 318 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 319
 320         $p=$regs{$p} if (defined($regs{$p}));
 321
 322         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 323         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 324         return $p;
 325         }
 326
 327 sub main'file
 328         {
 329         local($file)=@_;
 330
 331         local($tmp)=<<"EOF";
 332         .file   "$file.s"
 333 EOF
 334         push(@out,$tmp);
 335         }
 336
 337 sub main'function_begin
 338         {
 339         local($func)=@_;
 340
 341         &main'external_label($func);
 342         $func=$under.$func;
 343
 344         local($tmp)=<<"EOF";
 345 .text
 346 .globl  $func
 347 EOF
 348         push(@out,$tmp);
 349         if ($main'cpp)
 350                 { $tmp=push(@out,"TYPE($func,\@function)\n"); }
 351         elsif ($main'coff)
 352                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 353         elsif ($main'aout and !$main'pic)
 354                 { }
 355         else    { $tmp=push(@out,".type\t$func,\@function\n"); }
 356         push(@out,".align\t$align\n");
 357         push(@out,"$func:\n");
 358         $tmp=<<"EOF";
 359         pushl   %ebp
 360         pushl   %ebx
 361         pushl   %esi
 362         pushl   %edi
 363
 364 EOF
 365         push(@out,$tmp);
 366         $stack=20;
 367         }
 368
 369 sub main'function_begin_B
 370         {
 371         local($func,$extra)=@_;
 372
 373         &main'external_label($func);
 374         $func=$under.$func;
 375
 376         local($tmp)=<<"EOF";
 377 .text
 378 .globl  $func
 379 EOF
 380         push(@out,$tmp);
 381         if ($main'cpp)
 382                 { push(@out,"TYPE($func,\@function)\n"); }
 383         elsif ($main'coff)
 384                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 385         elsif ($main'aout and !$main'pic)
 386                 { }
 387         else    { push(@out,".type      $func,\@function\n"); }
 388         push(@out,".align\t$align\n");
 389         push(@out,"$func:\n");
 390         $stack=4;
 391         }
 392
 393 sub main'function_end
 394         {
 395         local($func)=@_;
 396
 397         $func=$under.$func;
 398
 399         local($tmp)=<<"EOF";
 400         popl    %edi
 401         popl    %esi
 402         popl    %ebx
 403         popl    %ebp
 404         ret
 405 ${dot}L_${func}_end:
 406 EOF
 407         push(@out,$tmp);
 408
 409         if ($main'cpp)
 410                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 411         elsif ($main'coff or $main'aout)
 412                 { }
 413         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 414         push(@out,".ident       \"$func\"\n");
 415         $stack=0;
 416         %label=();
 417         }
 418
 419 sub main'function_end_A
 420         {
 421         local($func)=@_;
 422
 423         local($tmp)=<<"EOF";
 424         popl    %edi
 425         popl    %esi
 426         popl    %ebx
 427         popl    %ebp
 428         ret
 429 EOF
 430         push(@out,$tmp);
 431         }
 432
 433 sub main'function_end_B
 434         {
 435         local($func)=@_;
 436
 437         $func=$under.$func;
 438
 439         push(@out,"${dot}L_${func}_end:\n");
 440         if ($main'cpp)
 441                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 442         elsif ($main'coff or $main'aout)
 443                 { }
 444         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 445         push(@out,".ident       \"$func\"\n");
 446         $stack=0;
 447         %label=();
 448         }
 449
 450 sub main'wparam
 451         {
 452         local($num)=@_;
 453
 454         return(&main'DWP($stack+$num*4,"esp","",0));
 455         }
 456
 457 sub main'stack_push
 458         {
 459         local($num)=@_;
 460         $stack+=$num*4;
 461         &main'sub("esp",$num*4);
 462         }
 463
 464 sub main'stack_pop
 465         {
 466         local($num)=@_;
 467         $stack-=$num*4;
 468         &main'add("esp",$num*4);
 469         }
 470
 471 sub main'swtmp
 472         {
 473         return(&main'DWP($_[0]*4,"esp","",0));
 474         }
 475
 476 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 477 #sub main'wtmp
 478 #       {
 479 #       local($num)=@_;
 480 #
 481 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 482 #       }
 483
 484 sub main'comment
 485         {
 486         if (!defined($com_start) or $main'elf)
 487                 {       # Regarding $main'elf above...
 488                         # GNU and SVR4 as'es use different comment delimiters,
 489                 push(@out,"\n");        # so we just skip ELF comments...
 490                 return;
 491                 }
 492         foreach (@_)
 493                 {
 494                 if (/^\s*$/)
 495                         { push(@out,"\n"); }
 496                 else
 497                         { push(@out,"\t$com_start $_ $com_end\n"); }
 498                 }
 499         }
 500
 501 sub main'label
 502         {
 503         if (!defined($label{$_[0]}))
 504                 {
 505                 $label{$_[0]}="${dot}${label}${_[0]}";
 506                 $label++;
 507                 }
 508         return($label{$_[0]});
 509         }
 510
 511 sub main'set_label
 512         {
 513         if (!defined($label{$_[0]}))
 514                 {
 515                 $label{$_[0]}="${dot}${label}${_[0]}";
 516                 $label++;
 517                 }
 518         if ($_[1]!=0)
 519                 {
 520                 if ($_[1]>1)    { main'align($_[1]);            }
 521                 else            { push(@out,".align $align\n"); }
 522                 }
 523         push(@out,"$label{$_[0]}:\n");
 524         }
 525
 526 sub main'file_end
 527         {
 528         # try to detect if SSE2 or MMX extensions were used on ELF platform...
 529         if ($main'elf && grep {/%[x]*mm[0-7]/i} @out) {
 530                 local($tmp);
 531
 532                 push (@out,"\n.comm\t${under}OPENSSL_ia32cap_P,4,4\n");
 533
 534                 push (@out,".section\t.init\n");
 535                 # One can argue that it's wasteful to craft every
 536                 # SSE/MMX module with this snippet... Well, it's 72
 537                 # bytes long and for the moment we have two modules.
 538                 # Let's argue when we have 7 modules or so...
 539                 #
 540                 # $1<<10 sets a reserved bit to signal that variable
 541                 # was initialized already...
 542                 &main'picmeup("edx","OPENSSL_ia32cap_P");
 543                 $tmp=<<___;
 544                 cmpl    \$0,(%edx)
 545                 jne     1f
 546                 movl    \$1<<10,(%edx)
 547                 pushf
 548                 popl    %eax
 549                 movl    %eax,%ecx
 550                 xorl    \$1<<21,%eax
 551                 pushl   %eax
 552                 popf
 553                 pushf
 554                 popl    %eax
 555                 xorl    %ecx,%eax
 556                 btl     \$21,%eax
 557                 jnc     1f
 558                 pushl   %edi
 559                 pushl   %ebx
 560                 movl    %edx,%edi
 561                 movl    \$1,%eax
 562                 .byte   0x0f,0xa2
 563                 orl     \$1<<10,%edx
 564                 movl    %edx,0(%edi)
 565                 popl    %ebx
 566                 popl    %edi
 567         .align  $align
 568         1:
 569 ___
 570                 push (@out,$tmp);
 571         }
 572
 573         if ($const ne "")
 574                 {
 575                 push(@out,".section .rodata\n");
 576                 push(@out,$const);
 577                 $const="";
 578                 }
 579         }
 580
 581 sub main'data_word
 582         {
 583         push(@out,"\t.long\t".join(',',@_)."\n");
 584         }
 585
 586 sub main'align
 587         {
 588         my $val=$_[0],$p2,$i;
 589         if ($main'aout) {
 590                 for ($p2=0;$val!=0;$val>>=1) { $p2++; }
 591                 $val=$p2-1;
 592                 $val.=",0x90";
 593         }
 594         push(@out,".align\t$val\n");
 595         }
 596
 597 # debug output functions: puts, putx, printf
 598
 599 sub main'puts
 600         {
 601         &pushvars();
 602         &main'push('$Lstring' . ++$constl);
 603         &main'call('puts');
 604         $stack-=4;
 605         &main'add("esp",4);
 606         &popvars();
 607
 608         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 609         }
 610
 611 sub main'putx
 612         {
 613         &pushvars();
 614         &main'push($_[0]);
 615         &main'push('$Lstring' . ++$constl);
 616         &main'call('printf');
 617         &main'add("esp",8);
 618         $stack-=8;
 619         &popvars();
 620
 621         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 622         }
 623
 624 sub main'printf
 625         {
 626         $ostack = $stack;
 627         &pushvars();
 628         for ($i = @_ - 1; $i >= 0; $i--)
 629                 {
 630                 if ($i == 0) # change this to support %s format strings
 631                         {
 632                         &main'push('$Lstring' . ++$constl);
 633                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
 634                         }
 635                 else
 636                         {
 637                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
 638                                 {
 639                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
 640                                 }
 641                         else
 642                                 {
 643                                 &main'push($_[$i]);
 644                                 }
 645                         }
 646                 }
 647         &main'call('printf');
 648         $stack-=4*@_;
 649         &main'add("esp",4*@_);
 650         &popvars();
 651         }
 652
 653 sub pushvars
 654         {
 655         &main'pushf();
 656         &main'push("edx");
 657         &main'push("ecx");
 658         &main'push("eax");
 659         }
 660
 661 sub popvars
 662         {
 663         &main'pop("eax");
 664         &main'pop("ecx");
 665         &main'pop("edx");
 666         &main'popf();
 667         }
 668
 669 sub main'picmeup
 670         {
 671         local($dst,$sym)=@_;
 672         if ($main'cpp)
 673                 {
 674                 local($tmp)=<<___;
 675 #if (defined(ELF) || defined(SOL)) && defined(PIC)
 676         call    1f
 677 1:      popl    $regs{$dst}
 678         addl    \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
 679         movl    $sym\@GOT($regs{$dst}),$regs{$dst}
 680 #else
 681         leal    $sym,$regs{$dst}
 682 #endif
 683 ___
 684                 push(@out,$tmp);
 685                 }
 686         elsif ($main'pic && ($main'elf || $main'aout))
 687                 {
 688                 &main'call(&main'label("PIC_me_up"));
 689                 &main'set_label("PIC_me_up");
 690                 &main'blindpop($dst);
 691                 &main'add($dst,"\$${under}_GLOBAL_OFFSET_TABLE_+[.-".
 692                                 &main'label("PIC_me_up") . "]");
 693                 &main'mov($dst,&main'DWP($under.$sym."\@GOT",$dst));
 694                 }
 695         else
 696                 {
 697                 &main'lea($dst,&main'DWP($sym));
 698                 }
 699         }
 700
 701 sub main'blindpop { &out1("popl",@_); }
 702
 703 sub main'initseg
 704         {
 705         local($f)=@_;
 706         local($tmp);
 707         if ($main'elf)
 708                 {
 709                 $tmp=<<___;
 710 .section        .init
 711         call    $under$f
 712         .align  $align
 713 ___
 714                 }
 715         elsif ($main'coff)
 716                 {
 717                 $tmp=<<___;     # applies to both Cygwin and Mingw
 718 .section        .ctors
 719 .long   $under$f
 720 ___
 721                 }
 722         elsif ($main'aout)
 723                 {
 724                 local($ctor)="${under}_GLOBAL_\$I\$$f";
 725                 $tmp=".text\n";
 726                 $tmp.=".type    $ctor,\@function\n" if ($main'pic);
 727                 $tmp.=<<___;    # OpenBSD way...
 728 .globl  $ctor
 729 .align  2
 730 $ctor:
 731         jmp     $under$f
 732 ___
 733                 }
 734         push(@out,$tmp) if ($tmp);
 735         }
 736
 737 1;