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.$_[0]); 202 } 203sub main'call_ptr { &out1p("call",@_); } 204sub main'ret { &out0("ret"); } 205sub main'nop { &out0("nop"); } 206sub main'test { &out2("testl",@_); } 207sub main'bt { &out2("btl",@_); } 208sub main'leave { &out0("leave"); } 209sub main'cpuid { &out0(".byte\t0x0f,0xa2"); } 210sub main'rdtsc { &out0(".byte\t0x0f,0x31"); } 211sub main'halt { &out0("hlt"); } 212sub main'movz { &out2("movzbl",@_); } 213sub main'neg { &out1("negl",@_); } 214sub main'cld { &out0("cld"); } 215 216# SSE2 217sub main'emms { &out0("emms"); } 218sub main'movd { &out2("movd",@_); } 219sub main'movdqu { &out2("movdqu",@_); } 220sub main'movdqa { &out2("movdqa",@_); } 221sub main'movdq2q{ &out2("movdq2q",@_); } 222sub main'movq2dq{ &out2("movq2dq",@_); } 223sub main'paddq { &out2("paddq",@_); } 224sub main'pmuludq{ &out2("pmuludq",@_); } 225sub main'psrlq { &out2("psrlq",@_); } 226sub main'psllq { &out2("psllq",@_); } 227sub main'pxor { &out2("pxor",@_); } 228sub main'por { &out2("por",@_); } 229sub main'pand { &out2("pand",@_); } 230sub main'movq { 231 local($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. 239sub main'bswap 240 { 241 if ($main'i386) 242 { 243 &main'comment("bswapl @_"); 244 &main'exch(main'HB(@_),main'LB(@_)); 245 &main'rotr(@_,16); 246 &main'exch(main'HB(@_),main'LB(@_)); 247 } 248 else 249 { 250 &out1("bswapl",@_); 251 } 252 } 253 254sub out2 255 { 256 local($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($p1)."\n"); 285 } 286 287sub out1 288 { 289 local($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($p1)."\n"); 308 } 309 310sub out1p 311 { 312 local($name,$p1)=@_; 313 local($l,$t); 314 315 push(@out,"\t$name\t*".&conv($p1)."\n"); 316 } 317 318sub out0 319 { 320 push(@out,"\t$_[0]\n"); 321 } 322 323sub 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 $p; 334 } 335 336sub main'file 337 { 338 local($file)=@_; 339 340 local($tmp)=<<"EOF"; 341 .file "$file.s" 342EOF 343 push(@out,$tmp); 344 } 345 346sub main'function_begin 347 { 348 local($func)=@_; 349 350 &main'external_label($func); 351 $func=$under.$func; 352 353 local($tmp)=<<"EOF"; 354.text 355.globl $func 356EOF 357 push(@out,$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 $tmp=<<"EOF"; 368 pushl %ebp 369 pushl %ebx 370 pushl %esi 371 pushl %edi 372 373EOF 374 push(@out,$tmp); 375 $stack=20; 376 } 377 378sub main'function_begin_B 379 { 380 local($func,$extra)=@_; 381 382 &main'external_label($func); 383 $func=$under.$func; 384 385 local($tmp)=<<"EOF"; 386.text 387.globl $func 388EOF 389 push(@out,$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 $stack=4; 400 } 401 402sub main'function_end 403 { 404 local($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: 415EOF 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 $stack=0; 425 %label=(); 426 } 427 428sub main'function_end_A 429 { 430 local($func)=@_; 431 432 local($tmp)=<<"EOF"; 433 popl %edi 434 popl %esi 435 popl %ebx 436 popl %ebp 437 ret 438EOF 439 push(@out,$tmp); 440 } 441 442sub 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 $stack=0; 456 %label=(); 457 } 458 459sub main'wparam 460 { 461 local($num)=@_; 462 463 return(&main'DWP($stack+$num*4,"esp","",0)); 464 } 465 466sub main'stack_push 467 { 468 local($num)=@_; 469 $stack+=$num*4; 470 &main'sub("esp",$num*4); 471 } 472 473sub main'stack_pop 474 { 475 local($num)=@_; 476 $stack-=$num*4; 477 &main'add("esp",$num*4); 478 } 479 480sub main'swtmp 481 { 482 return(&main'DWP($_[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 493sub 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 510sub main'public_label 511 { 512 $label{$_[0]}="${under}${_[0]}" if (!defined($label{$_[0]})); 513 push(@out,".globl\t$label{$_[0]}\n"); 514 } 515 516sub main'label 517 { 518 if (!defined($label{$_[0]})) 519 { 520 $label{$_[0]}="${dot}${label}${_[0]}"; 521 $label++; 522 } 523 return($label{$_[0]}); 524 } 525 526sub main'set_label 527 { 528 if (!defined($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{$_[0]}:\n"); 539 } 540 541sub main'file_end 542 { 543 # try to detect if SSE2 or MMX extensions were used on ELF platform... 544 if ($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 598sub main'data_byte 599 { 600 push(@out,"\t.byte\t".join(',',@_)."\n"); 601 } 602 603sub main'data_word 604 { 605 push(@out,"\t.long\t".join(',',@_)."\n"); 606 } 607 608sub 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 621sub 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 633sub 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 646sub 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 $stack-=4*@_; 671 &main'add("esp",4*@_); 672 &popvars(); 673 } 674 675sub pushvars 676 { 677 &main'pushf(); 678 &main'push("edx"); 679 &main'push("ecx"); 680 &main'push("eax"); 681 } 682 683sub popvars 684 { 685 &main'pop("eax"); 686 &main'pop("ecx"); 687 &main'pop("edx"); 688 &main'popf(); 689 } 690 691sub main'picmeup 692 { 693 local($dst,$sym)=@_; 694 if ($main'cpp) 695 { 696 local($tmp)=<<___; 697#if (defined(ELF) || defined(SOL)) && defined(PIC) 698 call 1f 6991: 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 723sub main'blindpop { &out1("popl",@_); } 724 725sub 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 7611; 762