crypto/openssl-0.9/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($_[0]=~/%[a-d][lh]/?"xchgb":"xchgl",@_); }
 171 sub main'cmp    { &out2("cmpl",@_); }
 172 sub main'lea    { &out2("leal",@_); }
 173 sub main'mul    { &out1("mull",@_); }
 174 sub main'div    { &out1("divl",@_); }
 175 sub main'jmp    { &out1("jmp",@_); }
 176 sub main'jmp_ptr { &out1p("jmp",@_); }
 177 sub main'je     { &out1("je",@_); }
 178 sub main'jle    { &out1("jle",@_); }
 179 sub main'jne    { &out1("jne",@_); }
 180 sub main'jnz    { &out1("jnz",@_); }
 181 sub main'jz     { &out1("jz",@_); }
 182 sub main'jge    { &out1("jge",@_); }
 183 sub main'jl     { &out1("jl",@_); }
 184 sub main'ja     { &out1("ja",@_); }
 185 sub main'jae    { &out1("jae",@_); }
 186 sub main'jb     { &out1("jb",@_); }
 187 sub main'jbe    { &out1("jbe",@_); }
 188 sub main'jc     { &out1("jc",@_); }
 189 sub main'jnc    { &out1("jnc",@_); }
 190 sub main'jno    { &out1("jno",@_); }
 191 sub main'dec    { &out1("decl",@_); }
 192 sub main'inc    { &out1($_[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.$_[0]);
 202                 }
 203 sub main'call_ptr { &out1p("call",@_); }
 204 sub main'ret    { &out0("ret"); }
 205 sub main'nop    { &out0("nop"); }
 206 sub main'test   { &out2("testl",@_); }
 207 sub main'bt     { &out2("btl",@_); }
 208 sub main'leave  { &out0("leave"); }
 209 sub main'cpuid  { &out0(".byte\t0x0f,0xa2"); }
 210 sub main'rdtsc  { &out0(".byte\t0x0f,0x31"); }
 211 sub main'halt   { &out0("hlt"); }
 212 sub main'movz   { &out2("movzbl",@_); }
 213 sub main'neg    { &out1("negl",@_); }
 214 sub main'cld    { &out0("cld"); }
 215
 216 # SSE2
 217 sub main'emms   { &out0("emms"); }
 218 sub main'movd   { &out2("movd",@_); }
 219 sub main'movdqu { &out2("movdqu",@_); }
 220 sub main'movdqa { &out2("movdqa",@_); }
 221 sub main'movdq2q{ &out2("movdq2q",@_); }
 222 sub main'movq2dq{ &out2("movq2dq",@_); }
 223 sub main'paddq  { &out2("paddq",@_); }
 224 sub main'pmuludq{ &out2("pmuludq",@_); }
 225 sub main'psrlq  { &out2("psrlq",@_); }
 226 sub main'psllq  { &out2("psllq",@_); }
 227 sub main'pxor   { &out2("pxor",@_); }
 228 sub main'por    { &out2("por",@_); }
 229 sub main'pand   { &out2("pand",@_); }
 230 sub main'movq   {
 231         local($p1,$p2,$optimize)=@_;
 232         if ($optimize && $p1=~/^mm[0-7]$/ && $p2=~/^mm[0-7]$/)
 233                 # movq between mmx registers can sink Intel CPUs
 234                 {       push(@out,"\tpshufw\t\$0xe4,%$p2,%$p1\n");      }
 235         else    {       &out2("movq",@_);                               }
 236         }
 237
 238 # The bswapl instruction is new for the 486. Emulate if i386.
 239 sub main'bswap
 240         {
 241         if ($main'i386)
 242                 {
 243                 &main'comment("bswapl @_");
 244                 &main'exch(main'HB(@_),main'LB(@_));
 245                 &main'rotr(@_,16);
 246                 &main'exch(main'HB(@_),main'LB(@_));
 247                 }
 248         else
 249                 {
 250                 &out1("bswapl",@_);
 251                 }
 252         }
 253
 254 sub out2
 255         {
 256         local($name,$p1,$p2)=@_;
 257         local($l,$ll,$t);
 258         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 259                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 260                                 "shll",0xD1E0,"shrl",0xD1E8,
 261                                 "sarl",0xD1F8);
 262
 263         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 264                 {
 265                 $op=$special{$name}|$reg_val{$p1};
 266                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 267                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 268                 push(@out,$tmp1);
 269                 push(@out,$tmp2);
 270
 271                 $p2=&conv($p2);
 272                 $p1=&conv($p1);
 273                 &main'comment("$name $p2 $p1");
 274                 return;
 275                 }
 276
 277         push(@out,"\t$name\t");
 278         $t=&conv($p2).",";
 279         $l=length($t);
 280         push(@out,$t);
 281         $ll=4-($l+9)/8;
 282         $tmp1=sprintf("\t" x $ll);
 283         push(@out,$tmp1);
 284         push(@out,&conv($p1)."\n");
 285         }
 286
 287 sub out1
 288         {
 289         local($name,$p1)=@_;
 290         local($l,$t);
 291         local(%special)=("bswapl",0x0FC8);
 292
 293         if ((defined($special{$name})) && defined($regs{$p1}))
 294                 {
 295                 $op=$special{$name}|$reg_val{$p1};
 296                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 297                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 298                 push(@out,$tmp1);
 299                 push(@out,$tmp2);
 300
 301                 $p2=&conv($p2);
 302                 $p1=&conv($p1);
 303                 &main'comment("$name $p2 $p1");
 304                 return;
 305                 }
 306
 307         push(@out,"\t$name\t".&conv($p1)."\n");
 308         }
 309
 310 sub out1p
 311         {
 312         local($name,$p1)=@_;
 313         local($l,$t);
 314
 315         push(@out,"\t$name\t*".&conv($p1)."\n");
 316         }
 317
 318 sub out0
 319         {
 320         push(@out,"\t$_[0]\n");
 321         }
 322
 323 sub conv
 324         {
 325         local($p)=@_;
 326
 327 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 328
 329         $p=$regs{$p} if (defined($regs{$p}));
 330
 331         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 332         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 333         return $p;
 334         }
 335
 336 sub main'file
 337         {
 338         local($file)=@_;
 339
 340         local($tmp)=<<"EOF";
 341         .file   "$file.s"
 342 EOF
 343         push(@out,$tmp);
 344         }
 345
 346 sub main'function_begin
 347         {
 348         local($func)=@_;
 349
 350         &main'external_label($func);
 351         $func=$under.$func;
 352
 353         local($tmp)=<<"EOF";
 354 .text
 355 .globl  $func
 356 EOF
 357         push(@out,$tmp);
 358         if ($main'cpp)
 359                 { $tmp=push(@out,"TYPE($func,\@function)\n"); }
 360         elsif ($main'coff)
 361                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 362         elsif ($main'aout and !$main'pic)
 363                 { }
 364         else    { $tmp=push(@out,".type\t$func,\@function\n"); }
 365         push(@out,".align\t$align\n");
 366         push(@out,"$func:\n");
 367         $tmp=<<"EOF";
 368         pushl   %ebp
 369         pushl   %ebx
 370         pushl   %esi
 371         pushl   %edi
 372
 373 EOF
 374         push(@out,$tmp);
 375         $stack=20;
 376         }
 377
 378 sub main'function_begin_B
 379         {
 380         local($func,$extra)=@_;
 381
 382         &main'external_label($func);
 383         $func=$under.$func;
 384
 385         local($tmp)=<<"EOF";
 386 .text
 387 .globl  $func
 388 EOF
 389         push(@out,$tmp);
 390         if ($main'cpp)
 391                 { push(@out,"TYPE($func,\@function)\n"); }
 392         elsif ($main'coff)
 393                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 394         elsif ($main'aout and !$main'pic)
 395                 { }
 396         else    { push(@out,".type      $func,\@function\n"); }
 397         push(@out,".align\t$align\n");
 398         push(@out,"$func:\n");
 399         $stack=4;
 400         }
 401
 402 sub main'function_end
 403         {
 404         local($func)=@_;
 405
 406         $func=$under.$func;
 407
 408         local($tmp)=<<"EOF";
 409         popl    %edi
 410         popl    %esi
 411         popl    %ebx
 412         popl    %ebp
 413         ret
 414 ${dot}L_${func}_end:
 415 EOF
 416         push(@out,$tmp);
 417
 418         if ($main'cpp)
 419                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 420         elsif ($main'coff or $main'aout)
 421                 { }
 422         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 423         push(@out,".ident       \"$func\"\n");
 424         $stack=0;
 425         %label=();
 426         }
 427
 428 sub main'function_end_A
 429         {
 430         local($func)=@_;
 431
 432         local($tmp)=<<"EOF";
 433         popl    %edi
 434         popl    %esi
 435         popl    %ebx
 436         popl    %ebp
 437         ret
 438 EOF
 439         push(@out,$tmp);
 440         }
 441
 442 sub main'function_end_B
 443         {
 444         local($func)=@_;
 445
 446         $func=$under.$func;
 447
 448         push(@out,"${dot}L_${func}_end:\n");
 449         if ($main'cpp)
 450                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 451         elsif ($main'coff or $main'aout)
 452                 { }
 453         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 454         push(@out,".ident       \"$func\"\n");
 455         $stack=0;
 456         %label=();
 457         }
 458
 459 sub main'wparam
 460         {
 461         local($num)=@_;
 462
 463         return(&main'DWP($stack+$num*4,"esp","",0));
 464         }
 465
 466 sub main'stack_push
 467         {
 468         local($num)=@_;
 469         $stack+=$num*4;
 470         &main'sub("esp",$num*4);
 471         }
 472
 473 sub main'stack_pop
 474         {
 475         local($num)=@_;
 476         $stack-=$num*4;
 477         &main'add("esp",$num*4);
 478         }
 479
 480 sub main'swtmp
 481         {
 482         return(&main'DWP($_[0]*4,"esp","",0));
 483         }
 484
 485 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 486 #sub main'wtmp
 487 #       {
 488 #       local($num)=@_;
 489 #
 490 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 491 #       }
 492
 493 sub main'comment
 494         {
 495         if (!defined($com_start) or $main'elf)
 496                 {       # Regarding $main'elf above...
 497                         # GNU and SVR4 as'es use different comment delimiters,
 498                 push(@out,"\n");        # so we just skip ELF comments...
 499                 return;
 500                 }
 501         foreach (@_)
 502                 {
 503                 if (/^\s*$/)
 504                         { push(@out,"\n"); }
 505                 else
 506                         { push(@out,"\t$com_start $_ $com_end\n"); }
 507                 }
 508         }
 509
 510 sub main'public_label
 511         {
 512         $label{$_[0]}="${under}${_[0]}" if (!defined($label{$_[0]}));
 513         push(@out,".globl\t$label{$_[0]}\n");
 514         }
 515
 516 sub main'label
 517         {
 518         if (!defined($label{$_[0]}))
 519                 {
 520                 $label{$_[0]}="${dot}${label}${_[0]}";
 521                 $label++;
 522                 }
 523         return($label{$_[0]});
 524         }
 525
 526 sub main'set_label
 527         {
 528         if (!defined($label{$_[0]}))
 529                 {
 530                 $label{$_[0]}="${dot}${label}${_[0]}";
 531                 $label++;
 532                 }
 533         if ($_[1]!=0)
 534                 {
 535                 if ($_[1]>1)    { main'align($_[1]);            }
 536                 else            { push(@out,".align $align\n"); }
 537                 }
 538         push(@out,"$label{$_[0]}:\n");
 539         }
 540
 541 sub main'file_end
 542         {
 543         # try to detect if SSE2 or MMX extensions were used on ELF platform...
 544         if ($main'elf && grep {/%[x]*mm[0-7]/i} @out) {
 545                 local($tmp);
 546
 547                 push (@out,"\n.section\t.bss\n");
 548                 push (@out,".comm\t${under}OPENSSL_ia32cap_P,4,4\n");
 549
 550                 push (@out,".section\t.init\n");
 551                 # One can argue that it's wasteful to craft every
 552                 # SSE/MMX module with this snippet... Well, it's 72
 553                 # bytes long and for the moment we have two modules.
 554                 # Let's argue when we have 7 modules or so...
 555                 #
 556                 # $1<<10 sets a reserved bit to signal that variable
 557                 # was initialized already...
 558                 &main'picmeup("edx","OPENSSL_ia32cap_P");
 559                 $tmp=<<___;
 560                 cmpl    \$0,(%edx)
 561                 jne     1f
 562                 movl    \$1<<10,(%edx)
 563                 pushf
 564                 popl    %eax
 565                 movl    %eax,%ecx
 566                 xorl    \$1<<21,%eax
 567                 pushl   %eax
 568                 popf
 569                 pushf
 570                 popl    %eax
 571                 xorl    %ecx,%eax
 572                 btl     \$21,%eax
 573                 jnc     1f
 574                 pushl   %edi
 575                 pushl   %ebx
 576                 movl    %edx,%edi
 577                 movl    \$1,%eax
 578                 .byte   0x0f,0xa2
 579                 orl     \$1<<10,%edx
 580                 movl    %edx,0(%edi)
 581                 popl    %ebx
 582                 popl    %edi
 583                 jmp     1f
 584         .align  $align
 585         1:
 586 ___
 587                 push (@out,$tmp);
 588         }
 589
 590         if ($const ne "")
 591                 {
 592                 push(@out,".section .rodata\n");
 593                 push(@out,$const);
 594                 $const="";
 595                 }
 596         }
 597
 598 sub main'data_byte
 599         {
 600         push(@out,"\t.byte\t".join(',',@_)."\n");
 601         }
 602
 603 sub main'data_word
 604         {
 605         push(@out,"\t.long\t".join(',',@_)."\n");
 606         }
 607
 608 sub main'align
 609         {
 610         my $val=$_[0],$p2,$i;
 611         if ($main'aout) {
 612                 for ($p2=0;$val!=0;$val>>=1) { $p2++; }
 613                 $val=$p2-1;
 614                 $val.=",0x90";
 615         }
 616         push(@out,".align\t$val\n");
 617         }
 618
 619 # debug output functions: puts, putx, printf
 620
 621 sub main'puts
 622         {
 623         &pushvars();
 624         &main'push('$Lstring' . ++$constl);
 625         &main'call('puts');
 626         $stack-=4;
 627         &main'add("esp",4);
 628         &popvars();
 629
 630         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 631         }
 632
 633 sub main'putx
 634         {
 635         &pushvars();
 636         &main'push($_[0]);
 637         &main'push('$Lstring' . ++$constl);
 638         &main'call('printf');
 639         &main'add("esp",8);
 640         $stack-=8;
 641         &popvars();
 642
 643         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 644         }
 645
 646 sub main'printf
 647         {
 648         $ostack = $stack;
 649         &pushvars();
 650         for ($i = @_ - 1; $i >= 0; $i--)
 651                 {
 652                 if ($i == 0) # change this to support %s format strings
 653                         {
 654                         &main'push('$Lstring' . ++$constl);
 655                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
 656                         }
 657                 else
 658                         {
 659                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
 660                                 {
 661                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
 662                                 }
 663                         else
 664                                 {
 665                                 &main'push($_[$i]);
 666                                 }
 667                         }
 668                 }
 669         &main'call('printf');
 670         $stack-=4*@_;
 671         &main'add("esp",4*@_);
 672         &popvars();
 673         }
 674
 675 sub pushvars
 676         {
 677         &main'pushf();
 678         &main'push("edx");
 679         &main'push("ecx");
 680         &main'push("eax");
 681         }
 682
 683 sub popvars
 684         {
 685         &main'pop("eax");
 686         &main'pop("ecx");
 687         &main'pop("edx");
 688         &main'popf();
 689         }
 690
 691 sub main'picmeup
 692         {
 693         local($dst,$sym)=@_;
 694         if ($main'cpp)
 695                 {
 696                 local($tmp)=<<___;
 697 #if (defined(ELF) || defined(SOL)) && defined(PIC)
 698         call    1f
 699 1:      popl    $regs{$dst}
 700         addl    \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
 701         movl    $sym\@GOT($regs{$dst}),$regs{$dst}
 702 #else
 703         leal    $sym,$regs{$dst}
 704 #endif
 705 ___
 706                 push(@out,$tmp);
 707                 }
 708         elsif ($main'pic && ($main'elf || $main'aout))
 709                 {
 710                 &main'call(&main'label("PIC_me_up"));
 711                 &main'set_label("PIC_me_up");
 712                 &main'blindpop($dst);
 713                 &main'add($dst,"\$${under}_GLOBAL_OFFSET_TABLE_+[.-".
 714                                 &main'label("PIC_me_up") . "]");
 715                 &main'mov($dst,&main'DWP($under.$sym."\@GOT",$dst));
 716                 }
 717         else
 718                 {
 719                 &main'lea($dst,&main'DWP($sym));
 720                 }
 721         }
 722
 723 sub main'blindpop { &out1("popl",@_); }
 724
 725 sub main'initseg
 726         {
 727         local($f)=@_;
 728         local($tmp);
 729         if ($main'elf)
 730                 {
 731                 $tmp=<<___;
 732 .section        .init
 733         call    $under$f
 734         jmp     .Linitalign
 735 .align  $align
 736 .Linitalign:
 737 ___
 738                 }
 739         elsif ($main'coff)
 740                 {
 741                 $tmp=<<___;     # applies to both Cygwin and Mingw
 742 .section        .ctors
 743 .long   $under$f
 744 ___
 745                 }
 746         elsif ($main'aout)
 747                 {
 748                 local($ctor)="${under}_GLOBAL_\$I\$$f";
 749                 $tmp=".text\n";
 750                 $tmp.=".type    $ctor,\@function\n" if ($main'pic);
 751                 $tmp.=<<___;    # OpenBSD way...
 752 .globl  $ctor
 753 .align  2
 754 $ctor:
 755         jmp     $under$f
 756 ___
 757                 }
 758         push(@out,$tmp) if ($tmp);
 759         }
 760
 761 1;