1 #!/usr/bin/env perl 2 # 3 # ==================================================================== 4 # Written by Andy Polyakov <appro (at] openssl.org> for the OpenSSL 5 # project. The module is, however, dual licensed under OpenSSL and 6 # CRYPTOGAMS licenses depending on where you obtain it. For further 7 # details see http://www.openssl.org/~appro/cryptogams/. 8 # ==================================================================== 9 10 # June 2011 11 # 12 # This is RC4+MD5 "stitch" implementation. The idea, as spelled in 13 # http://download.intel.com/design/intarch/papers/323686.pdf, is that 14 # since both algorithms exhibit instruction-level parallelism, ILP, 15 # below theoretical maximum, interleaving them would allow to utilize 16 # processor resources better and achieve better performance. RC4 17 # instruction sequence is virtually identical to rc4-x86_64.pl, which 18 # is heavily based on submission by Maxim Perminov, Maxim Locktyukhin 19 # and Jim Guilford of Intel. MD5 is fresh implementation aiming to 20 # minimize register usage, which was used as "main thread" with RC4 21 # weaved into it, one RC4 round per one MD5 round. In addition to the 22 # stiched subroutine the script can generate standalone replacement 23 # md5_block_asm_data_order and RC4. Below are performance numbers in 24 # cycles per processed byte, less is better, for these the standalone 25 # subroutines, sum of them, and stitched one: 26 # 27 # RC4 MD5 RC4+MD5 stitch gain 28 # Opteron 6.5(*) 5.4 11.9 7.0 +70%(*) 29 # Core2 6.5 5.8 12.3 7.7 +60% 30 # Westmere 4.3 5.2 9.5 7.0 +36% 31 # Sandy Bridge 4.2 5.5 9.7 6.8 +43% 32 # Atom 9.3 6.5 15.8 11.1 +42% 33 # 34 # (*) rc4-x86_64.pl delivers 5.3 on Opteron, so real improvement 35 # is +53%... 36 37 my ($rc4,$md5)=(1,1); # what to generate? 38 my $D="#" if (!$md5); # if set to "#", MD5 is stitched into RC4(), 39 # but its result is discarded. Idea here is 40 # to be able to use 'openssl speed rc4' for 41 # benchmarking the stitched subroutine... 42 43 my $flavour = shift; 44 my $output = shift; 45 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; } 46 47 my $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/); 48 49 $0 =~ m/(.*[\/\\])[^\/\\]+$/; my $dir=$1; my $xlate; 50 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or 51 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or 52 die "can't locate x86_64-xlate.pl"; 53 54 open OUT,"| \"$^X\" $xlate $flavour $output"; 55 *STDOUT=*OUT; 56 57 my ($dat,$in0,$out,$ctx,$inp,$len, $func,$nargs); 58 59 if ($rc4 && !$md5) { 60 ($dat,$len,$in0,$out) = ("%rdi","%rsi","%rdx","%rcx"); 61 $func="RC4"; $nargs=4; 62 } elsif ($md5 && !$rc4) { 63 ($ctx,$inp,$len) = ("%rdi","%rsi","%rdx"); 64 $func="md5_block_asm_data_order"; $nargs=3; 65 } else { 66 ($dat,$in0,$out,$ctx,$inp,$len) = ("%rdi","%rsi","%rdx","%rcx","%r8","%r9"); 67 $func="rc4_md5_enc"; $nargs=6; 68 # void rc4_md5_enc( 69 # RC4_KEY *key, # 70 # const void *in0, # RC4 input 71 # void *out, # RC4 output 72 # MD5_CTX *ctx, # 73 # const void *inp, # MD5 input 74 # size_t len); # number of 64-byte blocks 75 } 76 77 my @K=( 0xd76aa478,0xe8c7b756,0x242070db,0xc1bdceee, 78 0xf57c0faf,0x4787c62a,0xa8304613,0xfd469501, 79 0x698098d8,0x8b44f7af,0xffff5bb1,0x895cd7be, 80 0x6b901122,0xfd987193,0xa679438e,0x49b40821, 81 82 0xf61e2562,0xc040b340,0x265e5a51,0xe9b6c7aa, 83 0xd62f105d,0x02441453,0xd8a1e681,0xe7d3fbc8, 84 0x21e1cde6,0xc33707d6,0xf4d50d87,0x455a14ed, 85 0xa9e3e905,0xfcefa3f8,0x676f02d9,0x8d2a4c8a, 86 87 0xfffa3942,0x8771f681,0x6d9d6122,0xfde5380c, 88 0xa4beea44,0x4bdecfa9,0xf6bb4b60,0xbebfbc70, 89 0x289b7ec6,0xeaa127fa,0xd4ef3085,0x04881d05, 90 0xd9d4d039,0xe6db99e5,0x1fa27cf8,0xc4ac5665, 91 92 0xf4292244,0x432aff97,0xab9423a7,0xfc93a039, 93 0x655b59c3,0x8f0ccc92,0xffeff47d,0x85845dd1, 94 0x6fa87e4f,0xfe2ce6e0,0xa3014314,0x4e0811a1, 95 0xf7537e82,0xbd3af235,0x2ad7d2bb,0xeb86d391 ); 96 97 my @V=("%r8d","%r9d","%r10d","%r11d"); # MD5 registers 98 my $tmp="%r12d"; 99 100 my @XX=("%rbp","%rsi"); # RC4 registers 101 my @TX=("%rax","%rbx"); 102 my $YY="%rcx"; 103 my $TY="%rdx"; 104 105 my $MOD=32; # 16, 32 or 64 106 107 $code.=<<___; 108 .text 109 .align 16 110 111 .globl $func 112 .type $func,\@function,$nargs 113 $func: 114 cmp \$0,$len 115 je .Labort 116 push %rbx 117 push %rbp 118 push %r12 119 push %r13 120 push %r14 121 push %r15 122 sub \$40,%rsp 123 .Lbody: 124 ___ 125 if ($rc4) { 126 $code.=<<___; 127 $D#md5# mov $ctx,%r11 # reassign arguments 128 mov $len,%r12 129 mov $in0,%r13 130 mov $out,%r14 131 $D#md5# mov $inp,%r15 132 ___ 133 $ctx="%r11" if ($md5); # reassign arguments 134 $len="%r12"; 135 $in0="%r13"; 136 $out="%r14"; 137 $inp="%r15" if ($md5); 138 $inp=$in0 if (!$md5); 139 $code.=<<___; 140 xor $XX[0],$XX[0] 141 xor $YY,$YY 142 143 lea 8($dat),$dat 144 mov -8($dat),$XX[0]#b 145 mov -4($dat),$YY#b 146 147 inc $XX[0]#b 148 sub $in0,$out 149 movl ($dat,$XX[0],4),$TX[0]#d 150 ___ 151 $code.=<<___ if (!$md5); 152 xor $TX[1],$TX[1] 153 test \$-128,$len 154 jz .Loop1 155 sub $XX[0],$TX[1] 156 and \$`$MOD-1`,$TX[1] 157 jz .Loop${MOD}_is_hot 158 sub $TX[1],$len 159 .Loop${MOD}_warmup: 160 add $TX[0]#b,$YY#b 161 movl ($dat,$YY,4),$TY#d 162 movl $TX[0]#d,($dat,$YY,4) 163 movl $TY#d,($dat,$XX[0],4) 164 add $TY#b,$TX[0]#b 165 inc $XX[0]#b 166 movl ($dat,$TX[0],4),$TY#d 167 movl ($dat,$XX[0],4),$TX[0]#d 168 xorb ($in0),$TY#b 169 movb $TY#b,($out,$in0) 170 lea 1($in0),$in0 171 dec $TX[1] 172 jnz .Loop${MOD}_warmup 173 174 mov $YY,$TX[1] 175 xor $YY,$YY 176 mov $TX[1]#b,$YY#b 177 178 .Loop${MOD}_is_hot: 179 mov $len,32(%rsp) # save original $len 180 shr \$6,$len # number of 64-byte blocks 181 ___ 182 if ($D && !$md5) { # stitch in dummy MD5 183 $md5=1; 184 $ctx="%r11"; 185 $inp="%r15"; 186 $code.=<<___; 187 mov %rsp,$ctx 188 mov $in0,$inp 189 ___ 190 } 191 } 192 $code.=<<___; 193 #rc4# add $TX[0]#b,$YY#b 194 #rc4# lea ($dat,$XX[0],4),$XX[1] 195 shl \$6,$len 196 add $inp,$len # pointer to the end of input 197 mov $len,16(%rsp) 198 199 #md5# mov $ctx,24(%rsp) # save pointer to MD5_CTX 200 #md5# mov 0*4($ctx),$V[0] # load current hash value from MD5_CTX 201 #md5# mov 1*4($ctx),$V[1] 202 #md5# mov 2*4($ctx),$V[2] 203 #md5# mov 3*4($ctx),$V[3] 204 jmp .Loop 205 206 .align 16 207 .Loop: 208 #md5# mov $V[0],0*4(%rsp) # put aside current hash value 209 #md5# mov $V[1],1*4(%rsp) 210 #md5# mov $V[2],2*4(%rsp) 211 #md5# mov $V[3],$tmp # forward reference 212 #md5# mov $V[3],3*4(%rsp) 213 ___ 214 215 sub R0 { 216 my ($i,$a,$b,$c,$d)=@_; 217 my @rot0=(7,12,17,22); 218 my $j=$i%16; 219 my $k=$i%$MOD; 220 my $xmm="%xmm".($j&1); 221 $code.=" movdqu ($in0),%xmm2\n" if ($rc4 && $j==15); 222 $code.=" add \$$MOD,$XX[0]#b\n" if ($rc4 && $j==15 && $k==$MOD-1); 223 $code.=" pxor $xmm,$xmm\n" if ($rc4 && $j<=1); 224 $code.=<<___; 225 #rc4# movl ($dat,$YY,4),$TY#d 226 #md5# xor $c,$tmp 227 #rc4# movl $TX[0]#d,($dat,$YY,4) 228 #md5# and $b,$tmp 229 #md5# add 4*`$j`($inp),$a 230 #rc4# add $TY#b,$TX[0]#b 231 #rc4# movl `4*(($k+1)%$MOD)`(`$k==$MOD-1?"$dat,$XX[0],4":"$XX[1]"`),$TX[1]#d 232 #md5# add \$$K[$i],$a 233 #md5# xor $d,$tmp 234 #rc4# movz $TX[0]#b,$TX[0]#d 235 #rc4# movl $TY#d,4*$k($XX[1]) 236 #md5# add $tmp,$a 237 #rc4# add $TX[1]#b,$YY#b 238 #md5# rol \$$rot0[$j%4],$a 239 #md5# mov `$j==15?"$b":"$c"`,$tmp # forward reference 240 #rc4# pinsrw \$`($j>>1)&7`,($dat,$TX[0],4),$xmm\n 241 #md5# add $b,$a 242 ___ 243 $code.=<<___ if ($rc4 && $j==15 && $k==$MOD-1); 244 mov $YY,$XX[1] 245 xor $YY,$YY # keyword to partial register 246 mov $XX[1]#b,$YY#b 247 lea ($dat,$XX[0],4),$XX[1] 248 ___ 249 $code.=<<___ if ($rc4 && $j==15); 250 psllq \$8,%xmm1 251 pxor %xmm0,%xmm2 252 pxor %xmm1,%xmm2 253 ___ 254 } 255 sub R1 { 256 my ($i,$a,$b,$c,$d)=@_; 257 my @rot1=(5,9,14,20); 258 my $j=$i%16; 259 my $k=$i%$MOD; 260 my $xmm="%xmm".($j&1); 261 $code.=" movdqu 16($in0),%xmm3\n" if ($rc4 && $j==15); 262 $code.=" add \$$MOD,$XX[0]#b\n" if ($rc4 && $j==15 && $k==$MOD-1); 263 $code.=" pxor $xmm,$xmm\n" if ($rc4 && $j<=1); 264 $code.=<<___; 265 #rc4# movl ($dat,$YY,4),$TY#d 266 #md5# xor $b,$tmp 267 #rc4# movl $TX[0]#d,($dat,$YY,4) 268 #md5# and $d,$tmp 269 #md5# add 4*`((1+5*$j)%16)`($inp),$a 270 #rc4# add $TY#b,$TX[0]#b 271 #rc4# movl `4*(($k+1)%$MOD)`(`$k==$MOD-1?"$dat,$XX[0],4":"$XX[1]"`),$TX[1]#d 272 #md5# add \$$K[$i],$a 273 #md5# xor $c,$tmp 274 #rc4# movz $TX[0]#b,$TX[0]#d 275 #rc4# movl $TY#d,4*$k($XX[1]) 276 #md5# add $tmp,$a 277 #rc4# add $TX[1]#b,$YY#b 278 #md5# rol \$$rot1[$j%4],$a 279 #md5# mov `$j==15?"$c":"$b"`,$tmp # forward reference 280 #rc4# pinsrw \$`($j>>1)&7`,($dat,$TX[0],4),$xmm\n 281 #md5# add $b,$a 282 ___ 283 $code.=<<___ if ($rc4 && $j==15 && $k==$MOD-1); 284 mov $YY,$XX[1] 285 xor $YY,$YY # keyword to partial register 286 mov $XX[1]#b,$YY#b 287 lea ($dat,$XX[0],4),$XX[1] 288 ___ 289 $code.=<<___ if ($rc4 && $j==15); 290 psllq \$8,%xmm1 291 pxor %xmm0,%xmm3 292 pxor %xmm1,%xmm3 293 ___ 294 } 295 sub R2 { 296 my ($i,$a,$b,$c,$d)=@_; 297 my @rot2=(4,11,16,23); 298 my $j=$i%16; 299 my $k=$i%$MOD; 300 my $xmm="%xmm".($j&1); 301 $code.=" movdqu 32($in0),%xmm4\n" if ($rc4 && $j==15); 302 $code.=" add \$$MOD,$XX[0]#b\n" if ($rc4 && $j==15 && $k==$MOD-1); 303 $code.=" pxor $xmm,$xmm\n" if ($rc4 && $j<=1); 304 $code.=<<___; 305 #rc4# movl ($dat,$YY,4),$TY#d 306 #md5# xor $c,$tmp 307 #rc4# movl $TX[0]#d,($dat,$YY,4) 308 #md5# xor $b,$tmp 309 #md5# add 4*`((5+3*$j)%16)`($inp),$a 310 #rc4# add $TY#b,$TX[0]#b 311 #rc4# movl `4*(($k+1)%$MOD)`(`$k==$MOD-1?"$dat,$XX[0],4":"$XX[1]"`),$TX[1]#d 312 #md5# add \$$K[$i],$a 313 #rc4# movz $TX[0]#b,$TX[0]#d 314 #md5# add $tmp,$a 315 #rc4# movl $TY#d,4*$k($XX[1]) 316 #rc4# add $TX[1]#b,$YY#b 317 #md5# rol \$$rot2[$j%4],$a 318 #md5# mov `$j==15?"\\\$-1":"$c"`,$tmp # forward reference 319 #rc4# pinsrw \$`($j>>1)&7`,($dat,$TX[0],4),$xmm\n 320 #md5# add $b,$a 321 ___ 322 $code.=<<___ if ($rc4 && $j==15 && $k==$MOD-1); 323 mov $YY,$XX[1] 324 xor $YY,$YY # keyword to partial register 325 mov $XX[1]#b,$YY#b 326 lea ($dat,$XX[0],4),$XX[1] 327 ___ 328 $code.=<<___ if ($rc4 && $j==15); 329 psllq \$8,%xmm1 330 pxor %xmm0,%xmm4 331 pxor %xmm1,%xmm4 332 ___ 333 } 334 sub R3 { 335 my ($i,$a,$b,$c,$d)=@_; 336 my @rot3=(6,10,15,21); 337 my $j=$i%16; 338 my $k=$i%$MOD; 339 my $xmm="%xmm".($j&1); 340 $code.=" movdqu 48($in0),%xmm5\n" if ($rc4 && $j==15); 341 $code.=" add \$$MOD,$XX[0]#b\n" if ($rc4 && $j==15 && $k==$MOD-1); 342 $code.=" pxor $xmm,$xmm\n" if ($rc4 && $j<=1); 343 $code.=<<___; 344 #rc4# movl ($dat,$YY,4),$TY#d 345 #md5# xor $d,$tmp 346 #rc4# movl $TX[0]#d,($dat,$YY,4) 347 #md5# or $b,$tmp 348 #md5# add 4*`((7*$j)%16)`($inp),$a 349 #rc4# add $TY#b,$TX[0]#b 350 #rc4# movl `4*(($k+1)%$MOD)`(`$k==$MOD-1?"$dat,$XX[0],4":"$XX[1]"`),$TX[1]#d 351 #md5# add \$$K[$i],$a 352 #rc4# movz $TX[0]#b,$TX[0]#d 353 #md5# xor $c,$tmp 354 #rc4# movl $TY#d,4*$k($XX[1]) 355 #md5# add $tmp,$a 356 #rc4# add $TX[1]#b,$YY#b 357 #md5# rol \$$rot3[$j%4],$a 358 #md5# mov \$-1,$tmp # forward reference 359 #rc4# pinsrw \$`($j>>1)&7`,($dat,$TX[0],4),$xmm\n 360 #md5# add $b,$a 361 ___ 362 $code.=<<___ if ($rc4 && $j==15); 363 mov $XX[0],$XX[1] 364 xor $XX[0],$XX[0] # keyword to partial register 365 mov $XX[1]#b,$XX[0]#b 366 mov $YY,$XX[1] 367 xor $YY,$YY # keyword to partial register 368 mov $XX[1]#b,$YY#b 369 lea ($dat,$XX[0],4),$XX[1] 370 psllq \$8,%xmm1 371 pxor %xmm0,%xmm5 372 pxor %xmm1,%xmm5 373 ___ 374 } 375 376 my $i=0; 377 for(;$i<16;$i++) { R0($i,@V); unshift(@V,pop(@V)); push(@TX,shift(@TX)); } 378 for(;$i<32;$i++) { R1($i,@V); unshift(@V,pop(@V)); push(@TX,shift(@TX)); } 379 for(;$i<48;$i++) { R2($i,@V); unshift(@V,pop(@V)); push(@TX,shift(@TX)); } 380 for(;$i<64;$i++) { R3($i,@V); unshift(@V,pop(@V)); push(@TX,shift(@TX)); } 381 382 $code.=<<___; 383 #md5# add 0*4(%rsp),$V[0] # accumulate hash value 384 #md5# add 1*4(%rsp),$V[1] 385 #md5# add 2*4(%rsp),$V[2] 386 #md5# add 3*4(%rsp),$V[3] 387 388 #rc4# movdqu %xmm2,($out,$in0) # write RC4 output 389 #rc4# movdqu %xmm3,16($out,$in0) 390 #rc4# movdqu %xmm4,32($out,$in0) 391 #rc4# movdqu %xmm5,48($out,$in0) 392 #md5# lea 64($inp),$inp 393 #rc4# lea 64($in0),$in0 394 cmp 16(%rsp),$inp # are we done? 395 jb .Loop 396 397 #md5# mov 24(%rsp),$len # restore pointer to MD5_CTX 398 #rc4# sub $TX[0]#b,$YY#b # correct $YY 399 #md5# mov $V[0],0*4($len) # write MD5_CTX 400 #md5# mov $V[1],1*4($len) 401 #md5# mov $V[2],2*4($len) 402 #md5# mov $V[3],3*4($len) 403 ___ 404 $code.=<<___ if ($rc4 && (!$md5 || $D)); 405 mov 32(%rsp),$len # restore original $len 406 and \$63,$len # remaining bytes 407 jnz .Loop1 408 jmp .Ldone 409 410 .align 16 411 .Loop1: 412 add $TX[0]#b,$YY#b 413 movl ($dat,$YY,4),$TY#d 414 movl $TX[0]#d,($dat,$YY,4) 415 movl $TY#d,($dat,$XX[0],4) 416 add $TY#b,$TX[0]#b 417 inc $XX[0]#b 418 movl ($dat,$TX[0],4),$TY#d 419 movl ($dat,$XX[0],4),$TX[0]#d 420 xorb ($in0),$TY#b 421 movb $TY#b,($out,$in0) 422 lea 1($in0),$in0 423 dec $len 424 jnz .Loop1 425 426 .Ldone: 427 ___ 428 $code.=<<___; 429 #rc4# sub \$1,$XX[0]#b 430 #rc4# movl $XX[0]#d,-8($dat) 431 #rc4# movl $YY#d,-4($dat) 432 433 mov 40(%rsp),%r15 434 mov 48(%rsp),%r14 435 mov 56(%rsp),%r13 436 mov 64(%rsp),%r12 437 mov 72(%rsp),%rbp 438 mov 80(%rsp),%rbx 439 lea 88(%rsp),%rsp 440 .Lepilogue: 441 .Labort: 442 ret 443 .size $func,.-$func 444 ___ 445 446 if ($rc4 && $D) { # sole purpose of this section is to provide 447 # option to use the generated module as drop-in 448 # replacement for rc4-x86_64.pl for debugging 449 # and testing purposes... 450 my ($idx,$ido)=("%r8","%r9"); 451 my ($dat,$len,$inp)=("%rdi","%rsi","%rdx"); 452 453 $code.=<<___; 454 .globl RC4_set_key 455 .type RC4_set_key,\@function,3 456 .align 16 457 RC4_set_key: 458 lea 8($dat),$dat 459 lea ($inp,$len),$inp 460 neg $len 461 mov $len,%rcx 462 xor %eax,%eax 463 xor $ido,$ido 464 xor %r10,%r10 465 xor %r11,%r11 466 jmp .Lw1stloop 467 468 .align 16 469 .Lw1stloop: 470 mov %eax,($dat,%rax,4) 471 add \$1,%al 472 jnc .Lw1stloop 473 474 xor $ido,$ido 475 xor $idx,$idx 476 .align 16 477 .Lw2ndloop: 478 mov ($dat,$ido,4),%r10d 479 add ($inp,$len,1),$idx#b 480 add %r10b,$idx#b 481 add \$1,$len 482 mov ($dat,$idx,4),%r11d 483 cmovz %rcx,$len 484 mov %r10d,($dat,$idx,4) 485 mov %r11d,($dat,$ido,4) 486 add \$1,$ido#b 487 jnc .Lw2ndloop 488 489 xor %eax,%eax 490 mov %eax,-8($dat) 491 mov %eax,-4($dat) 492 ret 493 .size RC4_set_key,.-RC4_set_key 494 495 .globl RC4_options 496 .type RC4_options,\@abi-omnipotent 497 .align 16 498 RC4_options: 499 lea .Lopts(%rip),%rax 500 ret 501 .align 64 502 .Lopts: 503 .asciz "rc4(64x,int)" 504 .align 64 505 .size RC4_options,.-RC4_options 506 ___ 507 } 508 # EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame, 509 # CONTEXT *context,DISPATCHER_CONTEXT *disp) 510 if ($win64) { 511 my $rec="%rcx"; 512 my $frame="%rdx"; 513 my $context="%r8"; 514 my $disp="%r9"; 515 516 $code.=<<___; 517 .extern __imp_RtlVirtualUnwind 518 .type se_handler,\@abi-omnipotent 519 .align 16 520 se_handler: 521 push %rsi 522 push %rdi 523 push %rbx 524 push %rbp 525 push %r12 526 push %r13 527 push %r14 528 push %r15 529 pushfq 530 sub \$64,%rsp 531 532 mov 120($context),%rax # pull context->Rax 533 mov 248($context),%rbx # pull context->Rip 534 535 lea .Lbody(%rip),%r10 536 cmp %r10,%rbx # context->Rip<.Lbody 537 jb .Lin_prologue 538 539 mov 152($context),%rax # pull context->Rsp 540 541 lea .Lepilogue(%rip),%r10 542 cmp %r10,%rbx # context->Rip>=.Lepilogue 543 jae .Lin_prologue 544 545 mov 40(%rax),%r15 546 mov 48(%rax),%r14 547 mov 56(%rax),%r13 548 mov 64(%rax),%r12 549 mov 72(%rax),%rbp 550 mov 80(%rax),%rbx 551 lea 88(%rax),%rax 552 553 mov %rbx,144($context) # restore context->Rbx 554 mov %rbp,160($context) # restore context->Rbp 555 mov %r12,216($context) # restore context->R12 556 mov %r13,224($context) # restore context->R12 557 mov %r14,232($context) # restore context->R14 558 mov %r15,240($context) # restore context->R15 559 560 .Lin_prologue: 561 mov 8(%rax),%rdi 562 mov 16(%rax),%rsi 563 mov %rax,152($context) # restore context->Rsp 564 mov %rsi,168($context) # restore context->Rsi 565 mov %rdi,176($context) # restore context->Rdi 566 567 mov 40($disp),%rdi # disp->ContextRecord 568 mov $context,%rsi # context 569 mov \$154,%ecx # sizeof(CONTEXT) 570 .long 0xa548f3fc # cld; rep movsq 571 572 mov $disp,%rsi 573 xor %rcx,%rcx # arg1, UNW_FLAG_NHANDLER 574 mov 8(%rsi),%rdx # arg2, disp->ImageBase 575 mov 0(%rsi),%r8 # arg3, disp->ControlPc 576 mov 16(%rsi),%r9 # arg4, disp->FunctionEntry 577 mov 40(%rsi),%r10 # disp->ContextRecord 578 lea 56(%rsi),%r11 # &disp->HandlerData 579 lea 24(%rsi),%r12 # &disp->EstablisherFrame 580 mov %r10,32(%rsp) # arg5 581 mov %r11,40(%rsp) # arg6 582 mov %r12,48(%rsp) # arg7 583 mov %rcx,56(%rsp) # arg8, (NULL) 584 call *__imp_RtlVirtualUnwind(%rip) 585 586 mov \$1,%eax # ExceptionContinueSearch 587 add \$64,%rsp 588 popfq 589 pop %r15 590 pop %r14 591 pop %r13 592 pop %r12 593 pop %rbp 594 pop %rbx 595 pop %rdi 596 pop %rsi 597 ret 598 .size se_handler,.-se_handler 599 600 .section .pdata 601 .align 4 602 .rva .LSEH_begin_$func 603 .rva .LSEH_end_$func 604 .rva .LSEH_info_$func 605 606 .section .xdata 607 .align 8 608 .LSEH_info_$func: 609 .byte 9,0,0,0 610 .rva se_handler 611 ___ 612 } 613 614 sub reg_part { 615 my ($reg,$conv)=@_; 616 if ($reg =~ /%r[0-9]+/) { $reg .= $conv; } 617 elsif ($conv eq "b") { $reg =~ s/%[er]([^x]+)x?/%$1l/; } 618 elsif ($conv eq "w") { $reg =~ s/%[er](.+)/%$1/; } 619 elsif ($conv eq "d") { $reg =~ s/%[er](.+)/%e$1/; } 620 return $reg; 621 } 622 623 $code =~ s/(%[a-z0-9]+)#([bwd])/reg_part($1,$2)/gem; 624 $code =~ s/\`([^\`]*)\`/eval $1/gem; 625 $code =~ s/pinsrw\s+\$0,/movd /gm; 626 627 $code =~ s/#md5#//gm if ($md5); 628 $code =~ s/#rc4#//gm if ($rc4); 629 630 print $code; 631 632 close STDOUT; 633
