1 #!/usr/bin/env perl
2 #
3 # ====================================================================
4 # Written by Andy Polyakov <appro@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;