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($_[0]=~/%[a-d][lh]/?"xchgb":"xchgl",@_); } 171sub main'cmp { &out2("cmpl",@_); } 172sub main'lea { &out2("leal",@_); } 173sub main'mul { &out1("mull",@_); } 174sub main'imul { &out2("imull",@_); } 175sub main'div { &out1("divl",@_); } 176sub main'jmp { &out1("jmp",@_); } 177sub main'jmp_ptr { &out1p("jmp",@_); } 178sub main'je { &out1("je",@_); } 179sub main'jle { &out1("jle",@_); } 180sub main'jne { &out1("jne",@_); } 181sub main'jnz { &out1("jnz",@_); } 182sub main'jz { &out1("jz",@_); } 183sub main'jge { &out1("jge",@_); } 184sub main'jl { &out1("jl",@_); } 185sub main'ja { &out1("ja",@_); } 186sub main'jae { &out1("jae",@_); } 187sub main'jb { &out1("jb",@_); } 188sub main'jbe { &out1("jbe",@_); } 189sub main'jc { &out1("jc",@_); } 190sub main'jnc { &out1("jnc",@_); } 191sub main'jno { &out1("jno",@_); } 192sub main'dec { &out1("decl",@_); } 193sub main'inc { &out1($_[0]=~/%[a-d][hl]/?"incb":"incl",@_); } 194sub main'push { &out1("pushl",@_); $stack+=4; } 195sub main'pop { &out1("popl",@_); $stack-=4; } 196sub main'pushf { &out0("pushfl"); $stack+=4; } 197sub main'popf { &out0("popfl"); $stack-=4; } 198sub main'not { &out1("notl",@_); } 199sub main'call { my $pre=$under; 200 foreach $i (%label) 201 { if ($label{$i} eq $_[0]) { $pre=''; last; } } 202 &out1("call",$pre.$_[0]); 203 } 204sub main'call_ptr { &out1p("call",@_); } 205sub main'ret { &out0("ret"); } 206sub main'nop { &out0("nop"); } 207sub main'test { &out2("testl",@_); } 208sub main'bt { &out2("btl",@_); } 209sub main'leave { &out0("leave"); } 210sub main'cpuid { &out0(".byte\t0x0f,0xa2"); } 211sub main'rdtsc { &out0(".byte\t0x0f,0x31"); } 212sub main'halt { &out0("hlt"); } 213sub main'movz { &out2("movzbl",@_); } 214sub main'neg { &out1("negl",@_); } 215sub main'cld { &out0("cld"); } 216 217# SSE2 218sub main'emms { &out0("emms"); } 219sub main'movd { &out2("movd",@_); } 220sub main'movdqu { &out2("movdqu",@_); } 221sub main'movdqa { &out2("movdqa",@_); } 222sub main'movdq2q{ &out2("movdq2q",@_); } 223sub main'movq2dq{ &out2("movq2dq",@_); } 224sub main'paddq { &out2("paddq",@_); } 225sub main'pmuludq{ &out2("pmuludq",@_); } 226sub main'psrlq { &out2("psrlq",@_); } 227sub main'psllq { &out2("psllq",@_); } 228sub main'pxor { &out2("pxor",@_); } 229sub main'por { &out2("por",@_); } 230sub main'pand { &out2("pand",@_); } 231sub main'movq { 232 local($p1,$p2,$optimize)=@_; 233 if ($optimize && $p1=~/^mm[0-7]$/ && $p2=~/^mm[0-7]$/) 234 # movq between mmx registers can sink Intel CPUs 235 { push(@out,"\tpshufw\t\$0xe4,%$p2,%$p1\n"); } 236 else { &out2("movq",@_); } 237 } 238 239# The bswapl instruction is new for the 486. Emulate if i386. 240sub main'bswap 241 { 242 if ($main'i386) 243 { 244 &main'comment("bswapl @_"); 245 &main'exch(main'HB(@_),main'LB(@_)); 246 &main'rotr(@_,16); 247 &main'exch(main'HB(@_),main'LB(@_)); 248 } 249 else 250 { 251 &out1("bswapl",@_); 252 } 253 } 254 255sub out2 256 { 257 local($name,$p1,$p2)=@_; 258 local($l,$ll,$t); 259 local(%special)=( "roll",0xD1C0,"rorl",0xD1C8, 260 "rcll",0xD1D0,"rcrl",0xD1D8, 261 "shll",0xD1E0,"shrl",0xD1E8, 262 "sarl",0xD1F8); 263 264 if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1)) 265 { 266 $op=$special{$name}|$reg_val{$p1}; 267 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff); 268 $tmp2=sprintf(".byte %d\t",$op &0xff); 269 push(@out,$tmp1); 270 push(@out,$tmp2); 271 272 $p2=&conv($p2); 273 $p1=&conv($p1); 274 &main'comment("$name $p2 $p1"); 275 return; 276 } 277 278 push(@out,"\t$name\t"); 279 $t=&conv($p2).","; 280 $l=length($t); 281 push(@out,$t); 282 $ll=4-($l+9)/8; 283 $tmp1=sprintf("\t" x $ll); 284 push(@out,$tmp1); 285 push(@out,&conv($p1)."\n"); 286 } 287 288sub out1 289 { 290 local($name,$p1)=@_; 291 local($l,$t); 292 local(%special)=("bswapl",0x0FC8); 293 294 if ((defined($special{$name})) && defined($regs{$p1})) 295 { 296 $op=$special{$name}|$reg_val{$p1}; 297 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff); 298 $tmp2=sprintf(".byte %d\t",$op &0xff); 299 push(@out,$tmp1); 300 push(@out,$tmp2); 301 302 $p2=&conv($p2); 303 $p1=&conv($p1); 304 &main'comment("$name $p2 $p1"); 305 return; 306 } 307 308 push(@out,"\t$name\t".&conv($p1)."\n"); 309 } 310 311sub out1p 312 { 313 local($name,$p1)=@_; 314 local($l,$t); 315 316 push(@out,"\t$name\t*".&conv($p1)."\n"); 317 } 318 319sub out0 320 { 321 push(@out,"\t$_[0]\n"); 322 } 323 324sub conv 325 { 326 local($p)=@_; 327 328# $p =~ s/0x([0-9A-Fa-f]+)/0$1h/; 329 330 $p=$regs{$p} if (defined($regs{$p})); 331 332 $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/; 333 $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/; 334 return $p; 335 } 336 337sub main'file 338 { 339 local($file)=@_; 340 341 local($tmp)=<<"EOF"; 342 .file "$file.s" 343EOF 344 push(@out,$tmp); 345 } 346 347sub main'function_begin 348 { 349 local($func)=@_; 350 351 &main'external_label($func); 352 $func=$under.$func; 353 354 local($tmp)=<<"EOF"; 355.text 356.globl $func 357EOF 358 push(@out,$tmp); 359 if ($main'cpp) 360 { $tmp=push(@out,"TYPE($func,\@function)\n"); } 361 elsif ($main'coff) 362 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); } 363 elsif ($main'aout and !$main'pic) 364 { } 365 else { $tmp=push(@out,".type\t$func,\@function\n"); } 366 push(@out,".align\t$align\n"); 367 push(@out,"$func:\n"); 368 $tmp=<<"EOF"; 369 pushl %ebp 370 pushl %ebx 371 pushl %esi 372 pushl %edi 373 374EOF 375 push(@out,$tmp); 376 $stack=20; 377 } 378 379sub main'function_begin_B 380 { 381 local($func,$extra)=@_; 382 383 &main'external_label($func); 384 $func=$under.$func; 385 386 local($tmp)=<<"EOF"; 387.text 388.globl $func 389EOF 390 push(@out,$tmp); 391 if ($main'cpp) 392 { push(@out,"TYPE($func,\@function)\n"); } 393 elsif ($main'coff) 394 { $tmp=push(@out,".def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); } 395 elsif ($main'aout and !$main'pic) 396 { } 397 else { push(@out,".type $func,\@function\n"); } 398 push(@out,".align\t$align\n"); 399 push(@out,"$func:\n"); 400 $stack=4; 401 } 402 403sub main'function_end 404 { 405 local($func)=@_; 406 407 $func=$under.$func; 408 409 local($tmp)=<<"EOF"; 410 popl %edi 411 popl %esi 412 popl %ebx 413 popl %ebp 414 ret 415${dot}L_${func}_end: 416EOF 417 push(@out,$tmp); 418 419 if ($main'cpp) 420 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); } 421 elsif ($main'coff or $main'aout) 422 { } 423 else { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); } 424 push(@out,".ident \"$func\"\n"); 425 $stack=0; 426 %label=(); 427 } 428 429sub main'function_end_A 430 { 431 local($func)=@_; 432 433 local($tmp)=<<"EOF"; 434 popl %edi 435 popl %esi 436 popl %ebx 437 popl %ebp 438 ret 439EOF 440 push(@out,$tmp); 441 } 442 443sub main'function_end_B 444 { 445 local($func)=@_; 446 447 $func=$under.$func; 448 449 push(@out,"${dot}L_${func}_end:\n"); 450 if ($main'cpp) 451 { push(@out,"SIZE($func,${dot}L_${func}_end-$func)\n"); } 452 elsif ($main'coff or $main'aout) 453 { } 454 else { push(@out,".size\t$func,${dot}L_${func}_end-$func\n"); } 455 push(@out,".ident \"$func\"\n"); 456 $stack=0; 457 %label=(); 458 } 459 460sub main'wparam 461 { 462 local($num)=@_; 463 464 return(&main'DWP($stack+$num*4,"esp","",0)); 465 } 466 467sub main'stack_push 468 { 469 local($num)=@_; 470 $stack+=$num*4; 471 &main'sub("esp",$num*4); 472 } 473 474sub main'stack_pop 475 { 476 local($num)=@_; 477 $stack-=$num*4; 478 &main'add("esp",$num*4); 479 } 480 481sub main'swtmp 482 { 483 return(&main'DWP($_[0]*4,"esp","",0)); 484 } 485 486# Should use swtmp, which is above esp. Linix can trash the stack above esp 487#sub main'wtmp 488# { 489# local($num)=@_; 490# 491# return(&main'DWP(-($num+1)*4,"esp","",0)); 492# } 493 494sub main'comment 495 { 496 if (!defined($com_start) or $main'elf) 497 { # Regarding $main'elf above... 498 # GNU and SVR4 as'es use different comment delimiters, 499 push(@out,"\n"); # so we just skip ELF comments... 500 return; 501 } 502 foreach (@_) 503 { 504 if (/^\s*$/) 505 { push(@out,"\n"); } 506 else 507 { push(@out,"\t$com_start $_ $com_end\n"); } 508 } 509 } 510 511sub main'public_label 512 { 513 $label{$_[0]}="${under}${_[0]}" if (!defined($label{$_[0]})); 514 push(@out,".globl\t$label{$_[0]}\n"); 515 } 516 517sub main'label 518 { 519 if (!defined($label{$_[0]})) 520 { 521 $label{$_[0]}="${dot}${label}${_[0]}"; 522 $label++; 523 } 524 return($label{$_[0]}); 525 } 526 527sub main'set_label 528 { 529 if (!defined($label{$_[0]})) 530 { 531 $label{$_[0]}="${dot}${label}${_[0]}"; 532 $label++; 533 } 534 if ($_[1]!=0) 535 { 536 if ($_[1]>1) { main'align($_[1]); } 537 else { push(@out,".align $align\n"); } 538 } 539 push(@out,"$label{$_[0]}:\n"); 540 } 541 542sub main'file_end 543 { 544 # try to detect if SSE2 or MMX extensions were used on ELF platform... 545 if ($main'elf && grep {/\b%[x]*mm[0-7]\b|OPENSSL_ia32cap_P\b/i} @out) { 546 local($tmp); 547 548 push (@out,"\n.section\t.bss\n"); 549 push (@out,".comm\t${under}OPENSSL_ia32cap_P,4,4\n"); 550 551 return; 552 } 553 554 if ($const ne "") 555 { 556 push(@out,".section .rodata\n"); 557 push(@out,$const); 558 $const=""; 559 } 560 } 561 562sub main'data_byte 563 { 564 push(@out,"\t.byte\t".join(',',@_)."\n"); 565 } 566 567sub main'data_word 568 { 569 push(@out,"\t.long\t".join(',',@_)."\n"); 570 } 571 572sub main'align 573 { 574 my $val=$_[0],$p2,$i; 575 if ($main'aout) { 576 for ($p2=0;$val!=0;$val>>=1) { $p2++; } 577 $val=$p2-1; 578 $val.=",0x90"; 579 } 580 push(@out,".align\t$val\n"); 581 } 582 583# debug output functions: puts, putx, printf 584 585sub main'puts 586 { 587 &pushvars(); 588 &main'push('$Lstring' . ++$constl); 589 &main'call('puts'); 590 $stack-=4; 591 &main'add("esp",4); 592 &popvars(); 593 594 $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n"; 595 } 596 597sub main'putx 598 { 599 &pushvars(); 600 &main'push($_[0]); 601 &main'push('$Lstring' . ++$constl); 602 &main'call('printf'); 603 &main'add("esp",8); 604 $stack-=8; 605 &popvars(); 606 607 $const .= "Lstring$constl:\n\t.string \"\%X\"\n"; 608 } 609 610sub main'printf 611 { 612 $ostack = $stack; 613 &pushvars(); 614 for ($i = @_ - 1; $i >= 0; $i--) 615 { 616 if ($i == 0) # change this to support %s format strings 617 { 618 &main'push('$Lstring' . ++$constl); 619 $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n"; 620 } 621 else 622 { 623 if ($_[$i] =~ /([0-9]*)\(%esp\)/) 624 { 625 &main'push(($1 + $stack - $ostack) . '(%esp)'); 626 } 627 else 628 { 629 &main'push($_[$i]); 630 } 631 } 632 } 633 &main'call('printf'); 634 $stack-=4*@_; 635 &main'add("esp",4*@_); 636 &popvars(); 637 } 638 639sub pushvars 640 { 641 &main'pushf(); 642 &main'push("edx"); 643 &main'push("ecx"); 644 &main'push("eax"); 645 } 646 647sub popvars 648 { 649 &main'pop("eax"); 650 &main'pop("ecx"); 651 &main'pop("edx"); 652 &main'popf(); 653 } 654 655sub main'picmeup 656 { 657 local($dst,$sym)=@_; 658 if ($main'cpp) 659 { 660 local($tmp)=<<___; 661#if (defined(ELF) || defined(SOL)) && defined(PIC) 662 call 1f 6631: popl $regs{$dst} 664 addl \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst} 665 movl $sym\@GOT($regs{$dst}),$regs{$dst} 666#else 667 leal $sym,$regs{$dst} 668#endif 669___ 670 push(@out,$tmp); 671 } 672 elsif ($main'pic && ($main'elf || $main'aout)) 673 { 674 &main'call(&main'label("PIC_me_up")); 675 &main'set_label("PIC_me_up"); 676 &main'blindpop($dst); 677 &main'add($dst,"\$${under}_GLOBAL_OFFSET_TABLE_+[.-". 678 &main'label("PIC_me_up") . "]"); 679 &main'mov($dst,&main'DWP($under.$sym."\@GOT",$dst)); 680 } 681 else 682 { 683 &main'lea($dst,&main'DWP($sym)); 684 } 685 } 686 687sub main'blindpop { &out1("popl",@_); } 688 689sub main'initseg 690 { 691 local($f)=@_; 692 local($tmp); 693 if ($main'elf) 694 { 695 $tmp=<<___; 696.section .init 697 call $under$f 698 jmp .Linitalign 699.align $align 700.Linitalign: 701___ 702 } 703 elsif ($main'coff) 704 { 705 $tmp=<<___; # applies to both Cygwin and Mingw 706.section .ctors 707.long $under$f 708___ 709 } 710 elsif ($main'aout) 711 { 712 local($ctor)="${under}_GLOBAL_\$I\$$f"; 713 $tmp=".text\n"; 714 $tmp.=".type $ctor,\@function\n" if ($main'pic); 715 $tmp.=<<___; # OpenBSD way... 716.globl $ctor 717.align 2 718$ctor: 719 jmp $under$f 720___ 721 } 722 push(@out,$tmp) if ($tmp); 723 } 724 7251; 726