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 sub main'pshufw {
 238         local ($dst,$src,$magic)=@_;
 239         push(@out,"\tpshufw\t\$$magic,%$src,%$dst\n");
 240         }
 241 sub main'punpckldq      { &out2("punpckldq",@_); }
 242 sub main'pcmpgtb        { &out2("pcmpgtb",@_);   }
 243 sub main'paddb          { &out2("paddb",@_);     }
 244 sub main'psrld          { &out2("psrld",@_);     }
 245 sub main'pslld          { &out2("pslld",@_);     }
 246
 247 # The bswapl instruction is new for the 486. Emulate if i386.
 248 sub main'bswap
 249         {
 250         if ($main'i386)
 251                 {
 252                 &main'comment("bswapl @_");
 253                 &main'exch(main'HB(@_),main'LB(@_));
 254                 &main'rotr(@_,16);
 255                 &main'exch(main'HB(@_),main'LB(@_));
 256                 }
 257         else
 258                 {
 259                 &out1("bswapl",@_);
 260                 }
 261         }
 262
 263 sub out2
 264         {
 265         local($name,$p1,$p2)=@_;
 266         local($l,$ll,$t);
 267         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 268                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 269                                 "shll",0xD1E0,"shrl",0xD1E8,
 270                                 "sarl",0xD1F8);
 271
 272         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 273                 {
 274                 $op=$special{$name}|$reg_val{$p1};
 275                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 276                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 277                 push(@out,$tmp1);
 278                 push(@out,$tmp2);
 279
 280                 $p2=&conv($p2);
 281                 $p1=&conv($p1);
 282                 &main'comment("$name $p2 $p1");
 283                 return;
 284                 }
 285
 286         push(@out,"\t$name\t");
 287         $t=&conv($p2).",";
 288         $l=length($t);
 289         push(@out,$t);
 290         $ll=4-($l+9)/8;
 291         $tmp1=sprintf("\t" x $ll);
 292         push(@out,$tmp1);
 293         push(@out,&conv($p1)."\n");
 294         }
 295
 296 sub out1
 297         {
 298         local($name,$p1)=@_;
 299         local($l,$t);
 300         local(%special)=("bswapl",0x0FC8);
 301
 302         if ((defined($special{$name})) && defined($regs{$p1}))
 303                 {
 304                 $op=$special{$name}|$reg_val{$p1};
 305                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 306                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 307                 push(@out,$tmp1);
 308                 push(@out,$tmp2);
 309
 310                 $p2=&conv($p2);
 311                 $p1=&conv($p1);
 312                 &main'comment("$name $p2 $p1");
 313                 return;
 314                 }
 315
 316         push(@out,"\t$name\t".&conv($p1)."\n");
 317         }
 318
 319 sub out1p
 320         {
 321         local($name,$p1)=@_;
 322         local($l,$t);
 323
 324         push(@out,"\t$name\t*".&conv($p1)."\n");
 325         }
 326
 327 sub out0
 328         {
 329         push(@out,"\t$_[0]\n");
 330         }
 331
 332 sub conv
 333         {
 334         local($p)=@_;
 335
 336 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 337
 338         $p=$regs{$p} if (defined($regs{$p}));
 339
 340         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 341         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 342         return $p;
 343         }
 344
 345 sub main'file
 346         {
 347         local($file)=@_;
 348
 349         local($tmp)=<<"EOF";
 350         .file   "$file.s"
 351 EOF
 352         push(@out,$tmp);
 353         }
 354
 355 sub main'function_begin
 356         {
 357         local($func)=@_;
 358
 359         &main'external_label($func);
 360         $func=$under.$func;
 361
 362         local($tmp)=<<"EOF";
 363 .text
 364 .globl  $func
 365 EOF
 366         push(@out,$tmp);
 367         if ($main'cpp)
 368                 { $tmp=push(@out,"TYPE($func,\@function)\n"); }
 369         elsif ($main'coff)
 370                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 371         elsif ($main'aout and !$main'pic)
 372                 { }
 373         else    { $tmp=push(@out,".type\t$func,\@function\n"); }
 374         push(@out,".align\t$align\n");
 375         push(@out,"$func:\n");
 376         $tmp=<<"EOF";
 377         pushl   %ebp
 378         pushl   %ebx
 379         pushl   %esi
 380         pushl   %edi
 381
 382 EOF
 383         push(@out,$tmp);
 384         $stack=20;
 385         }
 386
 387 sub main'function_begin_B
 388         {
 389         local($func,$extra)=@_;
 390
 391         &main'external_label($func);
 392         $func=$under.$func;
 393
 394         local($tmp)=<<"EOF";
 395 .text
 396 .globl  $func
 397 EOF
 398         push(@out,$tmp);
 399         if ($main'cpp)
 400                 { push(@out,"TYPE($func,\@function)\n"); }
 401         elsif ($main'coff)
 402                 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 403         elsif ($main'aout and !$main'pic)
 404                 { }
 405         else    { push(@out,".type      $func,\@function\n"); }
 406         push(@out,".align\t$align\n");
 407         push(@out,"$func:\n");
 408         $stack=4;
 409         }
 410
 411 sub main'function_end
 412         {
 413         local($func)=@_;
 414
 415         $func=$under.$func;
 416
 417         local($tmp)=<<"EOF";
 418         popl    %edi
 419         popl    %esi
 420         popl    %ebx
 421         popl    %ebp
 422         ret
 423 ${dot}L_${func}_end:
 424 EOF
 425         push(@out,$tmp);
 426
 427         if ($main'cpp)
 428                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 429         elsif ($main'coff or $main'aout)
 430                 { }
 431         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 432         push(@out,".ident       \"$func\"\n");
 433         $stack=0;
 434         %label=();
 435         }
 436
 437 sub main'function_end_A
 438         {
 439         local($func)=@_;
 440
 441         local($tmp)=<<"EOF";
 442         popl    %edi
 443         popl    %esi
 444         popl    %ebx
 445         popl    %ebp
 446         ret
 447 EOF
 448         push(@out,$tmp);
 449         }
 450
 451 sub main'function_end_B
 452         {
 453         local($func)=@_;
 454
 455         $func=$under.$func;
 456
 457         push(@out,"${dot}L_${func}_end:\n");
 458         if ($main'cpp)
 459                 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); }
 460         elsif ($main'coff or $main'aout)
 461                 { }
 462         else    { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); }
 463         push(@out,".ident       \"$func\"\n");
 464         $stack=0;
 465         %label=();
 466         }
 467
 468 sub main'wparam
 469         {
 470         local($num)=@_;
 471
 472         return(&main'DWP($stack+$num*4,"esp","",0));
 473         }
 474
 475 sub main'stack_push
 476         {
 477         local($num)=@_;
 478         $stack+=$num*4;
 479         &main'sub("esp",$num*4);
 480         }
 481
 482 sub main'stack_pop
 483         {
 484         local($num)=@_;
 485         $stack-=$num*4;
 486         &main'add("esp",$num*4);
 487         }
 488
 489 sub main'swtmp
 490         {
 491         return(&main'DWP($_[0]*4,"esp","",0));
 492         }
 493
 494 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 495 #sub main'wtmp
 496 #       {
 497 #       local($num)=@_;
 498 #
 499 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 500 #       }
 501
 502 sub main'comment
 503         {
 504         if (!defined($com_start) or $main'elf)
 505                 {       # Regarding $main'elf above...
 506                         # GNU and SVR4 as'es use different comment delimiters,
 507                 push(@out,"\n");        # so we just skip ELF comments...
 508                 return;
 509                 }
 510         foreach (@_)
 511                 {
 512                 if (/^\s*$/)
 513                         { push(@out,"\n"); }
 514                 else
 515                         { push(@out,"\t$com_start $_ $com_end\n"); }
 516                 }
 517         }
 518
 519 sub main'public_label
 520         {
 521         $label{$_[0]}="${under}${_[0]}" if (!defined($label{$_[0]}));
 522         push(@out,".globl\t$label{$_[0]}\n");
 523         }
 524
 525 sub main'label
 526         {
 527         if (!defined($label{$_[0]}))
 528                 {
 529                 $label{$_[0]}="${dot}${label}${_[0]}";
 530                 $label++;
 531                 }
 532         return($label{$_[0]});
 533         }
 534
 535 sub main'set_label
 536         {
 537         if (!defined($label{$_[0]}))
 538                 {
 539                 $label{$_[0]}="${dot}${label}${_[0]}";
 540                 $label++;
 541                 }
 542         if ($_[1]!=0)
 543                 {
 544                 if ($_[1]>1)    { main'align($_[1]);            }
 545                 else            { push(@out,".align $align\n"); }
 546                 }
 547         push(@out,"$label{$_[0]}:\n");
 548         }
 549
 550 sub main'file_end
 551         {
 552         # try to detect if SSE2 or MMX extensions were used on ELF platform...
 553         if ($main'elf && grep {/%[x]*mm[0-7]/i} @out) {
 554                 local($tmp);
 555
 556                 push (@out,"\n.section\t.bss\n");
 557                 push (@out,".comm\t${under}OPENSSL_ia32cap_P,4,4\n");
 558
 559                 push (@out,".section\t.init\n");
 560                 # One can argue that it's wasteful to craft every
 561                 # SSE/MMX module with this snippet... Well, it's 72
 562                 # bytes long and for the moment we have two modules.
 563                 # Let's argue when we have 7 modules or so...
 564                 #
 565                 # $1<<10 sets a reserved bit to signal that variable
 566                 # was initialized already...
 567                 &main'picmeup("edx","OPENSSL_ia32cap_P");
 568                 $tmp=<<___;
 569                 cmpl    \$0,(%edx)
 570                 jne     1f
 571                 movl    \$1<<10,(%edx)
 572                 pushf
 573                 popl    %eax
 574                 movl    %eax,%ecx
 575                 xorl    \$1<<21,%eax
 576                 pushl   %eax
 577                 popf
 578                 pushf
 579                 popl    %eax
 580                 xorl    %ecx,%eax
 581                 btl     \$21,%eax
 582                 jnc     1f
 583                 pushl   %edi
 584                 pushl   %ebx
 585                 movl    %edx,%edi
 586                 movl    \$1,%eax
 587                 .byte   0x0f,0xa2
 588                 orl     \$1<<10,%edx
 589                 movl    %edx,0(%edi)
 590                 popl    %ebx
 591                 popl    %edi
 592                 jmp     1f
 593         .align  $align
 594         1:
 595 ___
 596                 push (@out,$tmp);
 597         }
 598
 599         if ($const ne "")
 600                 {
 601                 push(@out,".section .rodata\n");
 602                 push(@out,$const);
 603                 $const="";
 604                 }
 605         }
 606
 607 sub main'data_byte
 608         {
 609         push(@out,"\t.byte\t".join(',',@_)."\n");
 610         }
 611
 612 sub main'data_word
 613         {
 614         push(@out,"\t.long\t".join(',',@_)."\n");
 615         }
 616
 617 sub main'align
 618         {
 619         my $val=$_[0],$p2,$i;
 620         if ($main'aout) {
 621                 for ($p2=0;$val!=0;$val>>=1) { $p2++; }
 622                 $val=$p2-1;
 623                 $val.=",0x90";
 624         }
 625         push(@out,".align\t$val\n");
 626         }
 627
 628 # debug output functions: puts, putx, printf
 629
 630 sub main'puts
 631         {
 632         &pushvars();
 633         &main'push('$Lstring' . ++$constl);
 634         &main'call('puts');
 635         $stack-=4;
 636         &main'add("esp",4);
 637         &popvars();
 638
 639         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 640         }
 641
 642 sub main'putx
 643         {
 644         &pushvars();
 645         &main'push($_[0]);
 646         &main'push('$Lstring' . ++$constl);
 647         &main'call('printf');
 648         &main'add("esp",8);
 649         $stack-=8;
 650         &popvars();
 651
 652         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 653         }
 654
 655 sub main'printf
 656         {
 657         $ostack = $stack;
 658         &pushvars();
 659         for ($i = @_ - 1; $i >= 0; $i--)
 660                 {
 661                 if ($i == 0) # change this to support %s format strings
 662                         {
 663                         &main'push('$Lstring' . ++$constl);
 664                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
 665                         }
 666                 else
 667                         {
 668                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
 669                                 {
 670                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
 671                                 }
 672                         else
 673                                 {
 674                                 &main'push($_[$i]);
 675                                 }
 676                         }
 677                 }
 678         &main'call('printf');
 679         $stack-=4*@_;
 680         &main'add("esp",4*@_);
 681         &popvars();
 682         }
 683
 684 sub pushvars
 685         {
 686         &main'pushf();
 687         &main'push("edx");
 688         &main'push("ecx");
 689         &main'push("eax");
 690         }
 691
 692 sub popvars
 693         {
 694         &main'pop("eax");
 695         &main'pop("ecx");
 696         &main'pop("edx");
 697         &main'popf();
 698         }
 699
 700 sub main'picmeup
 701         {
 702         local($dst,$sym,$base,$label)=@_;
 703
 704         if ($main'cpp)
 705                 {
 706                 local($tmp);
 707                 if (!defined($base))
 708                         {
 709                         $tmp=<<___;
 710 #if (defined(ELF) || defined(SOL)) && defined(PIC)
 711         call    1f
 712 1:      popl    $regs{$dst}
 713         addl    \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
 714         movl    $sym\@GOT($regs{$dst}),$regs{$dst}
 715 #else
 716         leal    $sym,$regs{$dst}
 717 #endif
 718 ___
 719                         }
 720                 else    {
 721                         $tmp=<<___;
 722 #if (defined(ELF) || defined(SOL)) && defined(PIC)
 723         leal    _GLOBAL_OFFSET_TABLE_+[.-$label]($regs{$base}),$regs{$dst}
 724         movl    $sym\@GOT($regs{$dst}),$regs{$dst}
 725 #else
 726         leal    $sym,$regs{$dst}
 727 #endif
 728 ___
 729                         }
 730                 push(@out,$tmp);
 731                 }
 732         elsif ($main'pic && ($main'elf || $main'aout))
 733                 {
 734                 if (!defined($base))
 735                         {
 736                         &main'call(&main'label("PIC_me_up"));
 737                         &main'set_label("PIC_me_up");
 738                         &main'blindpop($dst);
 739                         &main'add($dst,"\$${under}_GLOBAL_OFFSET_TABLE_+[.-".
 740                                 &main'label("PIC_me_up") . "]");
 741                         }
 742                 else    {
 743                         &main'lea($dst,&main'DWP(
 744                                 "${under}_GLOBAL_OFFSET_TABLE_+[.-$label]",
 745                                 $base));
 746                         }
 747                 &main'mov($dst,&main'DWP($under.$sym."\@GOT",$dst));
 748                 }
 749         else
 750                 {
 751                 &main'lea($dst,&main'DWP($sym));
 752                 }
 753         }
 754
 755 sub main'blindpop { &out1("popl",@_); }
 756
 757 sub main'initseg
 758         {
 759         local($f)=@_;
 760         local($tmp);
 761         if ($main'elf)
 762                 {
 763                 $tmp=<<___;
 764 .section        .init
 765         call    $under$f
 766         jmp     .Linitalign
 767 .align  $align
 768 .Linitalign:
 769 ___
 770                 }
 771         elsif ($main'coff)
 772                 {
 773                 $tmp=<<___;     # applies to both Cygwin and Mingw
 774 .section        .ctors
 775 .long   $under$f
 776 ___
 777                 }
 778         elsif ($main'aout)
 779                 {
 780                 local($ctor)="${under}_GLOBAL_\$I\$$f";
 781                 $tmp=".text\n";
 782                 $tmp.=".type    $ctor,\@function\n" if ($main'pic);
 783                 $tmp.=<<___;    # OpenBSD way...
 784 .globl  $ctor
 785 .align  2
 786 $ctor:
 787         jmp     $under$f
 788 ___
 789                 }
 790         push(@out,$tmp) if ($tmp);
 791         }
 792
 793 1;