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