1#!/usr/local/bin/perl 2 3package 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 $main'coff); 13 14sub main'asm_init_output { @out=(); } 15sub main'asm_get_output { return(@out); } 16sub main'get_labels { return(@labels); } 17sub main'external_label { push(@labels,@_); } 18 19if ($main'cpp) 20 { 21 $align="ALIGN"; 22 $under=""; 23 $com_start='/*'; 24 $com_end='*/'; 25 } 26 27%lb=( 'eax', '%al', 28 'ebx', '%bl', 29 'ecx', '%cl', 30 'edx', '%dl', 31 'ax', '%al', 32 'bx', '%bl', 33 'cx', '%cl', 34 'dx', '%dl', 35 ); 36 37%hb=( 'eax', '%ah', 38 'ebx', '%bh', 39 'ecx', '%ch', 40 'edx', '%dh', 41 'ax', '%ah', 42 'bx', '%bh', 43 'cx', '%ch', 44 'dx', '%dh', 45 ); 46 47%regs=( 'eax', '%eax', 48 'ebx', '%ebx', 49 'ecx', '%ecx', 50 'edx', '%edx', 51 'esi', '%esi', 52 'edi', '%edi', 53 'ebp', '%ebp', 54 'esp', '%esp', 55 56 'mm0', '%mm0', 57 'mm1', '%mm1', 58 'mm2', '%mm2', 59 'mm3', '%mm3', 60 'mm4', '%mm4', 61 'mm5', '%mm5', 62 'mm6', '%mm6', 63 'mm7', '%mm7', 64 65 'xmm0', '%xmm0', 66 'xmm1', '%xmm1', 67 'xmm2', '%xmm2', 68 'xmm3', '%xmm3', 69 'xmm4', '%xmm4', 70 'xmm5', '%xmm5', 71 'xmm6', '%xmm6', 72 'xmm7', '%xmm7', 73 ); 74 75%reg_val=( 76 'eax', 0x00, 77 'ebx', 0x03, 78 'ecx', 0x01, 79 'edx', 0x02, 80 'esi', 0x06, 81 'edi', 0x07, 82 'ebp', 0x05, 83 'esp', 0x04, 84 ); 85 86sub main'LB 87 { 88 (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n"; 89 return($lb{$_[0]}); 90 } 91 92sub main'HB 93 { 94 (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n"; 95 return($hb{$_[0]}); 96 } 97 98sub main'DWP 99 { 100 local($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($ret); 117 } 118 119sub main'QWP 120 { 121 return(&main'DWP(@_)); 122 } 123 124sub main'BP 125 { 126 return(&main'DWP(@_)); 127 } 128 129sub main'BC 130 { 131 return @_; 132 } 133 134sub main'DWC 135 { 136 return @_; 137 } 138 139#sub main'BP 140# { 141# local($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($ret); 154# } 155 156sub main'mov { &out2("movl",@_); } 157sub main'movb { &out2("movb",@_); } 158sub main'and { &out2("andl",@_); } 159sub main'or { &out2("orl",@_); } 160sub main'shl { &out2("sall",@_); } 161sub main'shr { &out2("shrl",@_); } 162sub main'xor { &out2("xorl",@_); } 163sub main'xorb { &out2("xorb",@_); } 164sub main'add { &out2($_[0]=~/%[a-d][lh]/?"addb":"addl",@_); } 165sub main'adc { &out2("adcl",@_); } 166sub main'sub { &out2("subl",@_); } 167sub main'sbb { &out2("sbbl",@_); } 168sub main'rotl { &out2("roll",@_); } 169sub main'rotr { &out2("rorl",@_); } 170sub main'exch { &out2($_[0]=~/%[a-d][lh]/?"xchgb":"xchgl",@_); } 171sub main'cmp { &out2("cmpl",@_); } 172sub main'lea { &out2("leal",@_); } 173sub main'mul { &out1("mull",@_); } 174sub main'div { &out1("divl",@_); } 175sub main'jmp { &out1("jmp",@_); } 176sub main'jmp_ptr { &out1p("jmp",@_); } 177sub main'je { &out1("je",@_); } 178sub main'jle { &out1("jle",@_); } 179sub main'jne { &out1("jne",@_); } 180sub main'jnz { &out1("jnz",@_); } 181sub main'jz { &out1("jz",@_); } 182sub main'jge { &out1("jge",@_); } 183sub main'jl { &out1("jl",@_); } 184sub main'ja { &out1("ja",@_); } 185sub main'jae { &out1("jae",@_); } 186sub main'jb { &out1("jb",@_); } 187sub main'jbe { &out1("jbe",@_); } 188sub main'jc { &out1("jc",@_); } 189sub main'jnc { &out1("jnc",@_); } 190sub main'jno { &out1("jno",@_); } 191sub main'dec { &out1("decl",@_); } 192sub main'inc { &out1($_[0]=~/%[a-d][hl]/?"incb":"incl",@_); } 193sub main'push { &out1("pushl",@_); $stack+=4; } 194sub main'pop { &out1("popl",@_); $stack-=4; } 195sub main'pushf { &out0("pushfl"); $stack+=4; } 196sub main'popf { &out0("popfl"); $stack-=4; } 197sub main'not { &out1("notl",@_); } 198sub main'call { my $pre=$under; 199 foreach $i (%label) 200 { if ($label{$i} eq $_[0]) { $pre=''; last; } } 201 &out1("call",$pre.$_[0]); 202 } 203sub main'ret { &out0("ret"); } 204sub main'nop { &out0("nop"); } 205sub main'test { &out2("testl",@_); } 206sub main'bt { &out2("btl",@_); } 207sub main'leave { &out0("leave"); } 208sub main'cpuid { &out0(".byte\t0x0f,0xa2"); } 209sub main'rdtsc { &out0(".byte\t0x0f,0x31"); } 210sub main'halt { &out0("hlt"); } 211sub main'movz { &out2("movzbl",@_); } 212sub main'neg { &out1("negl",@_); } 213sub main'cld { &out0("cld"); } 214 215# SSE2 216sub main'emms { &out0("emms"); } 217sub main'movd { &out2("movd",@_); } 218sub main'movq { &out2("movq",@_); } 219sub main'movdqu { &out2("movdqu",@_); } 220sub main'movdqa { &out2("movdqa",@_); } 221sub main'movdq2q{ &out2("movdq2q",@_); } 222sub main'movq2dq{ &out2("movq2dq",@_); } 223sub main'paddq { &out2("paddq",@_); } 224sub main'pmuludq{ &out2("pmuludq",@_); } 225sub main'psrlq { &out2("psrlq",@_); } 226sub main'psllq { &out2("psllq",@_); } 227sub main'pxor { &out2("pxor",@_); } 228sub main'por { &out2("por",@_); } 229sub main'pand { &out2("pand",@_); } 230 231# The bswapl instruction is new for the 486. Emulate if i386. 232sub main'bswap 233 { 234 if ($main'i386) 235 { 236 &main'comment("bswapl @_"); 237 &main'exch(main'HB(@_),main'LB(@_)); 238 &main'rotr(@_,16); 239 &main'exch(main'HB(@_),main'LB(@_)); 240 } 241 else 242 { 243 &out1("bswapl",@_); 244 } 245 } 246 247sub out2 248 { 249 local($name,$p1,$p2)=@_; 250 local($l,$ll,$t); 251 local(%special)=( "roll",0xD1C0,"rorl",0xD1C8, 252 "rcll",0xD1D0,"rcrl",0xD1D8, 253 "shll",0xD1E0,"shrl",0xD1E8, 254 "sarl",0xD1F8); 255 256 if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1)) 257 { 258 $op=$special{$name}|$reg_val{$p1}; 259 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff); 260 $tmp2=sprintf(".byte %d\t",$op &0xff); 261 push(@out,$tmp1); 262 push(@out,$tmp2); 263 264 $p2=&conv($p2); 265 $p1=&conv($p1); 266 &main'comment("$name $p2 $p1"); 267 return; 268 } 269 270 push(@out,"\t$name\t"); 271 $t=&conv($p2).","; 272 $l=length($t); 273 push(@out,$t); 274 $ll=4-($l+9)/8; 275 $tmp1=sprintf("\t" x $ll); 276 push(@out,$tmp1); 277 push(@out,&conv($p1)."\n"); 278 } 279 280sub out1 281 { 282 local($name,$p1)=@_; 283 local($l,$t); 284 local(%special)=("bswapl",0x0FC8); 285 286 if ((defined($special{$name})) && defined($regs{$p1})) 287 { 288 $op=$special{$name}|$reg_val{$p1}; 289 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff); 290 $tmp2=sprintf(".byte %d\t",$op &0xff); 291 push(@out,$tmp1); 292 push(@out,$tmp2); 293 294 $p2=&conv($p2); 295 $p1=&conv($p1); 296 &main'comment("$name $p2 $p1"); 297 return; 298 } 299 300 push(@out,"\t$name\t".&conv($p1)."\n"); 301 } 302 303sub out1p 304 { 305 local($name,$p1)=@_; 306 local($l,$t); 307 308 push(@out,"\t$name\t*".&conv($p1)."\n"); 309 } 310 311sub out0 312 { 313 push(@out,"\t$_[0]\n"); 314 } 315 316sub conv 317 { 318 local($p)=@_; 319 320# $p =~ s/0x([0-9A-Fa-f]+)/0$1h/; 321 322 $p=$regs{$p} if (defined($regs{$p})); 323 324 $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/; 325 $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/; 326 return $p; 327 } 328 329sub main'file 330 { 331 local($file)=@_; 332 333 local($tmp)=<<"EOF"; 334 .file "$file.s" 335EOF 336 push(@out,$tmp); 337 } 338 339sub main'function_begin 340 { 341 local($func)=@_; 342 343 &main'external_label($func); 344 $func=$under.$func; 345 346 local($tmp)=<<"EOF"; 347.text 348.globl $func 349EOF 350 push(@out,$tmp); 351 if ($main'cpp) 352 { $tmp=push(@out,"TYPE($func,\@function)\n"); } 353 elsif ($main'coff) 354 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); } 355 elsif ($main'aout and !$main'pic) 356 { } 357 else { $tmp=push(@out,".type\t$func,\@function\n"); } 358 push(@out,".align\t$align\n"); 359 push(@out,"$func:\n"); 360 $tmp=<<"EOF"; 361 pushl %ebp 362 pushl %ebx 363 pushl %esi 364 pushl %edi 365 366EOF 367 push(@out,$tmp); 368 $stack=20; 369 } 370 371sub main'function_begin_B 372 { 373 local($func,$extra)=@_; 374 375 &main'external_label($func); 376 $func=$under.$func; 377 378 local($tmp)=<<"EOF"; 379.text 380.globl $func 381EOF 382 push(@out,$tmp); 383 if ($main'cpp) 384 { push(@out,"TYPE($func,\@function)\n"); } 385 elsif ($main'coff) 386 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); } 387 elsif ($main'aout and !$main'pic) 388 { } 389 else { push(@out,".type $func,\@function\n"); } 390 push(@out,".align\t$align\n"); 391 push(@out,"$func:\n"); 392 $stack=4; 393 } 394 395sub main'function_end 396 { 397 local($func)=@_; 398 399 $func=$under.$func; 400 401 local($tmp)=<<"EOF"; 402 popl %edi 403 popl %esi 404 popl %ebx 405 popl %ebp 406 ret 407${dot}L_${func}_end: 408EOF 409 push(@out,$tmp); 410 411 if ($main'cpp) 412 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); } 413 elsif ($main'coff or $main'aout) 414 { } 415 else { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); } 416 push(@out,".ident \"$func\"\n"); 417 $stack=0; 418 %label=(); 419 } 420 421sub main'function_end_A 422 { 423 local($func)=@_; 424 425 local($tmp)=<<"EOF"; 426 popl %edi 427 popl %esi 428 popl %ebx 429 popl %ebp 430 ret 431EOF 432 push(@out,$tmp); 433 } 434 435sub main'function_end_B 436 { 437 local($func)=@_; 438 439 $func=$under.$func; 440 441 push(@out,"${dot}L_${func}_end:\n"); 442 if ($main'cpp) 443 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); } 444 elsif ($main'coff or $main'aout) 445 { } 446 else { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); } 447 push(@out,".ident \"$func\"\n"); 448 $stack=0; 449 %label=(); 450 } 451 452sub main'wparam 453 { 454 local($num)=@_; 455 456 return(&main'DWP($stack+$num*4,"esp","",0)); 457 } 458 459sub main'stack_push 460 { 461 local($num)=@_; 462 $stack+=$num*4; 463 &main'sub("esp",$num*4); 464 } 465 466sub main'stack_pop 467 { 468 local($num)=@_; 469 $stack-=$num*4; 470 &main'add("esp",$num*4); 471 } 472 473sub main'swtmp 474 { 475 return(&main'DWP($_[0]*4,"esp","",0)); 476 } 477 478# Should use swtmp, which is above esp. Linix can trash the stack above esp 479#sub main'wtmp 480# { 481# local($num)=@_; 482# 483# return(&main'DWP(-($num+1)*4,"esp","",0)); 484# } 485 486sub main'comment 487 { 488 if (!defined($com_start) or $main'elf) 489 { # Regarding $main'elf above... 490 # GNU and SVR4 as'es use different comment delimiters, 491 push(@out,"\n"); # so we just skip ELF comments... 492 return; 493 } 494 foreach (@_) 495 { 496 if (/^\s*$/) 497 { push(@out,"\n"); } 498 else 499 { push(@out,"\t$com_start $_ $com_end\n"); } 500 } 501 } 502 503sub main'public_label 504 { 505 $label{$_[0]}="${under}${_[0]}" if (!defined($label{$_[0]})); 506 push(@out,".globl\t$label{$_[0]}\n"); 507 } 508 509sub main'label 510 { 511 if (!defined($label{$_[0]})) 512 { 513 $label{$_[0]}="${dot}${label}${_[0]}"; 514 $label++; 515 } 516 return($label{$_[0]}); 517 } 518 519sub main'set_label 520 { 521 if (!defined($label{$_[0]})) 522 { 523 $label{$_[0]}="${dot}${label}${_[0]}"; 524 $label++; 525 } 526 if ($_[1]!=0) 527 { 528 if ($_[1]>1) { main'align($_[1]); } 529 else { push(@out,".align $align\n"); } 530 } 531 push(@out,"$label{$_[0]}:\n"); 532 } 533 534sub main'file_end 535 { 536 # try to detect if SSE2 or MMX extensions were used on ELF platform... 537 if ($main'elf && grep {/%[x]*mm[0-7]/i} @out) { 538 local($tmp); 539 540 push (@out,"\n.section\t.bss\n"); 541 push (@out,".comm\t${under}OPENSSL_ia32cap_P,4,4\n"); 542 543 push (@out,".section\t.init\n"); 544 # One can argue that it's wasteful to craft every 545 # SSE/MMX module with this snippet... Well, it's 72 546 # bytes long and for the moment we have two modules. 547 # Let's argue when we have 7 modules or so... 548 # 549 # $1<<10 sets a reserved bit to signal that variable 550 # was initialized already... 551 &main'picmeup("edx","OPENSSL_ia32cap_P"); 552 $tmp=<<___; 553 cmpl \$0,(%edx) 554 jne 1f 555 movl \$1<<10,(%edx) 556 pushf 557 popl %eax 558 movl %eax,%ecx 559 xorl \$1<<21,%eax 560 pushl %eax 561 popf 562 pushf 563 popl %eax 564 xorl %ecx,%eax 565 btl \$21,%eax 566 jnc 1f 567 pushl %edi 568 pushl %ebx 569 movl %edx,%edi 570 movl \$1,%eax 571 .byte 0x0f,0xa2 572 orl \$1<<10,%edx 573 movl %edx,0(%edi) 574 popl %ebx 575 popl %edi 576 jmp 1f 577 .align $align 578 1: 579___ 580 push (@out,$tmp); 581 } 582 583 if ($const ne "") 584 { 585 push(@out,".section .rodata\n"); 586 push(@out,$const); 587 $const=""; 588 } 589 } 590 591sub main'data_word 592 { 593 push(@out,"\t.long\t".join(',',@_)."\n"); 594 } 595 596sub main'align 597 { 598 my $val=$_[0],$p2,$i; 599 if ($main'aout) { 600 for ($p2=0;$val!=0;$val>>=1) { $p2++; } 601 $val=$p2-1; 602 $val.=",0x90"; 603 } 604 push(@out,".align\t$val\n"); 605 } 606 607# debug output functions: puts, putx, printf 608 609sub main'puts 610 { 611 &pushvars(); 612 &main'push('$Lstring' . ++$constl); 613 &main'call('puts'); 614 $stack-=4; 615 &main'add("esp",4); 616 &popvars(); 617 618 $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n"; 619 } 620 621sub main'putx 622 { 623 &pushvars(); 624 &main'push($_[0]); 625 &main'push('$Lstring' . ++$constl); 626 &main'call('printf'); 627 &main'add("esp",8); 628 $stack-=8; 629 &popvars(); 630 631 $const .= "Lstring$constl:\n\t.string \"\%X\"\n"; 632 } 633 634sub main'printf 635 { 636 $ostack = $stack; 637 &pushvars(); 638 for ($i = @_ - 1; $i >= 0; $i--) 639 { 640 if ($i == 0) # change this to support %s format strings 641 { 642 &main'push('$Lstring' . ++$constl); 643 $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n"; 644 } 645 else 646 { 647 if ($_[$i] =~ /([0-9]*)\(%esp\)/) 648 { 649 &main'push(($1 + $stack - $ostack) . '(%esp)'); 650 } 651 else 652 { 653 &main'push($_[$i]); 654 } 655 } 656 } 657 &main'call('printf'); 658 $stack-=4*@_; 659 &main'add("esp",4*@_); 660 &popvars(); 661 } 662 663sub pushvars 664 { 665 &main'pushf(); 666 &main'push("edx"); 667 &main'push("ecx"); 668 &main'push("eax"); 669 } 670 671sub popvars 672 { 673 &main'pop("eax"); 674 &main'pop("ecx"); 675 &main'pop("edx"); 676 &main'popf(); 677 } 678 679sub main'picmeup 680 { 681 local($dst,$sym)=@_; 682 if ($main'cpp) 683 { 684 local($tmp)=<<___; 685#if (defined(ELF) || defined(SOL)) && defined(PIC) 686 call 1f 6871: popl $regs{$dst} 688 addl \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst} 689 movl $sym\@GOT($regs{$dst}),$regs{$dst} 690#else 691 leal $sym,$regs{$dst} 692#endif 693___ 694 push(@out,$tmp); 695 } 696 elsif ($main'pic && ($main'elf || $main'aout)) 697 { 698 &main'call(&main'label("PIC_me_up")); 699 &main'set_label("PIC_me_up"); 700 &main'blindpop($dst); 701 &main'add($dst,"\$${under}_GLOBAL_OFFSET_TABLE_+[.-". 702 &main'label("PIC_me_up") . "]"); 703 &main'mov($dst,&main'DWP($under.$sym."\@GOT",$dst)); 704 } 705 else 706 { 707 &main'lea($dst,&main'DWP($sym)); 708 } 709 } 710 711sub main'blindpop { &out1("popl",@_); } 712 713sub main'initseg 714 { 715 local($f)=@_; 716 local($tmp); 717 if ($main'elf) 718 { 719 $tmp=<<___; 720.section .init 721 call $under$f 722 jmp .Linitalign 723.align $align 724.Linitalign: 725___ 726 } 727 elsif ($main'coff) 728 { 729 $tmp=<<___; # applies to both Cygwin and Mingw 730.section .ctors 731.long $under$f 732___ 733 } 734 elsif ($main'aout) 735 { 736 local($ctor)="${under}_GLOBAL_\$I\$$f"; 737 $tmp=".text\n"; 738 $tmp.=".type $ctor,\@function\n" if ($main'pic); 739 $tmp.=<<___; # OpenBSD way... 740.globl $ctor 741.align 2 742$ctor: 743 jmp $under$f 744___ 745 } 746 push(@out,$tmp) if ($tmp); 747 } 748 7491; 750