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gerrit-public.fairphone.software / platform / dalvik / c35a2ef53d0cccd6f924eeba36633220ec67c32e / . / libdex / InstrUtils.c
blob: a3ee859bb27ab56af91edfc7d881ac942a0a96f4 [file] [log] [blame]
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]16
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]17/*
18 * Dalvik instruction utility functions.
19 */
20#include "InstrUtils.h"
21
22#include <stdlib.h>
23
24
25/*
26 * Generate a table that holds the width of all instructions.
27 *
28 * Standard instructions have positive values, optimizer instructions
29 * have negative values, unimplemented instructions have a width of zero.
30 *
31 * I'm doing it with a giant switch statement because it's easier to
32 * maintain and update than a static table with 256 unadorned integers,
33 * and if we're missing a case gcc emits a "warning: enumeration value not
34 * handled" message.
35 *
36 * (To save space in the binary we could generate a static table with a
37 * command-line utility.)
Andy McFadden861b3382010-03-05 15:58:31 -0800[diff] [blame]38 *
39 * TODO: it doesn't look like we're using the negative values anymore.
40 * Consider switching to only positive values.
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]41 */
42InstructionWidth* dexCreateInstrWidthTable(void)
43{
David 'Digit' Turnerec628b52009-09-20 11:58:16 -0700[diff] [blame]44#ifdef __ARM_ARCH_7A__
45 /* hack to work around mysterious problem on emulator */
46 LOGD("creating instr width table\n");
47#endif
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]48 InstructionWidth* instrWidth;
49 int i;
50
51 instrWidth = malloc(sizeof(InstructionWidth) * kNumDalvikInstructions);
52 if (instrWidth == NULL)
53 return NULL;
54
55 for (i = 0; i < kNumDalvikInstructions; i++) {
56 OpCode opc = (OpCode) i;
57 int width = 0;
58
59 switch (opc) {
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]60 case OP_NOP: /* note data for e.g. switch-* encoded "inside" a NOP */
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]61 case OP_MOVE:
62 case OP_MOVE_WIDE:
63 case OP_MOVE_OBJECT:
64 case OP_MOVE_RESULT:
65 case OP_MOVE_RESULT_WIDE:
66 case OP_MOVE_RESULT_OBJECT:
67 case OP_MOVE_EXCEPTION:
68 case OP_RETURN_VOID:
69 case OP_RETURN:
70 case OP_RETURN_WIDE:
71 case OP_RETURN_OBJECT:
72 case OP_CONST_4:
73 case OP_MONITOR_ENTER:
74 case OP_MONITOR_EXIT:
75 case OP_ARRAY_LENGTH:
76 case OP_THROW:
77 case OP_GOTO:
78 case OP_NEG_INT:
79 case OP_NOT_INT:
80 case OP_NEG_LONG:
81 case OP_NOT_LONG:
82 case OP_NEG_FLOAT:
83 case OP_NEG_DOUBLE:
84 case OP_INT_TO_LONG:
85 case OP_INT_TO_FLOAT:
86 case OP_INT_TO_DOUBLE:
87 case OP_LONG_TO_INT:
88 case OP_LONG_TO_FLOAT:
89 case OP_LONG_TO_DOUBLE:
90 case OP_FLOAT_TO_INT:
91 case OP_FLOAT_TO_LONG:
92 case OP_FLOAT_TO_DOUBLE:
93 case OP_DOUBLE_TO_INT:
94 case OP_DOUBLE_TO_LONG:
95 case OP_DOUBLE_TO_FLOAT:
96 case OP_INT_TO_BYTE:
97 case OP_INT_TO_CHAR:
98 case OP_INT_TO_SHORT:
99 case OP_ADD_INT_2ADDR:
100 case OP_SUB_INT_2ADDR:
101 case OP_MUL_INT_2ADDR:
102 case OP_DIV_INT_2ADDR:
103 case OP_REM_INT_2ADDR:
104 case OP_AND_INT_2ADDR:
105 case OP_OR_INT_2ADDR:
106 case OP_XOR_INT_2ADDR:
107 case OP_SHL_INT_2ADDR:
108 case OP_SHR_INT_2ADDR:
109 case OP_USHR_INT_2ADDR:
110 case OP_ADD_LONG_2ADDR:
111 case OP_SUB_LONG_2ADDR:
112 case OP_MUL_LONG_2ADDR:
113 case OP_DIV_LONG_2ADDR:
114 case OP_REM_LONG_2ADDR:
115 case OP_AND_LONG_2ADDR:
116 case OP_OR_LONG_2ADDR:
117 case OP_XOR_LONG_2ADDR:
118 case OP_SHL_LONG_2ADDR:
119 case OP_SHR_LONG_2ADDR:
120 case OP_USHR_LONG_2ADDR:
121 case OP_ADD_FLOAT_2ADDR:
122 case OP_SUB_FLOAT_2ADDR:
123 case OP_MUL_FLOAT_2ADDR:
124 case OP_DIV_FLOAT_2ADDR:
125 case OP_REM_FLOAT_2ADDR:
126 case OP_ADD_DOUBLE_2ADDR:
127 case OP_SUB_DOUBLE_2ADDR:
128 case OP_MUL_DOUBLE_2ADDR:
129 case OP_DIV_DOUBLE_2ADDR:
130 case OP_REM_DOUBLE_2ADDR:
131 width = 1;
132 break;
133
134 case OP_MOVE_FROM16:
135 case OP_MOVE_WIDE_FROM16:
136 case OP_MOVE_OBJECT_FROM16:
137 case OP_CONST_16:
138 case OP_CONST_HIGH16:
139 case OP_CONST_WIDE_16:
140 case OP_CONST_WIDE_HIGH16:
141 case OP_CONST_STRING:
142 case OP_CONST_CLASS:
143 case OP_CHECK_CAST:
144 case OP_INSTANCE_OF:
145 case OP_NEW_INSTANCE:
146 case OP_NEW_ARRAY:
147 case OP_CMPL_FLOAT:
148 case OP_CMPG_FLOAT:
149 case OP_CMPL_DOUBLE:
150 case OP_CMPG_DOUBLE:
151 case OP_CMP_LONG:
152 case OP_GOTO_16:
153 case OP_IF_EQ:
154 case OP_IF_NE:
155 case OP_IF_LT:
156 case OP_IF_GE:
157 case OP_IF_GT:
158 case OP_IF_LE:
159 case OP_IF_EQZ:
160 case OP_IF_NEZ:
161 case OP_IF_LTZ:
162 case OP_IF_GEZ:
163 case OP_IF_GTZ:
164 case OP_IF_LEZ:
165 case OP_AGET:
166 case OP_AGET_WIDE:
167 case OP_AGET_OBJECT:
168 case OP_AGET_BOOLEAN:
169 case OP_AGET_BYTE:
170 case OP_AGET_CHAR:
171 case OP_AGET_SHORT:
172 case OP_APUT:
173 case OP_APUT_WIDE:
174 case OP_APUT_OBJECT:
175 case OP_APUT_BOOLEAN:
176 case OP_APUT_BYTE:
177 case OP_APUT_CHAR:
178 case OP_APUT_SHORT:
179 case OP_IGET:
180 case OP_IGET_WIDE:
181 case OP_IGET_OBJECT:
182 case OP_IGET_BOOLEAN:
183 case OP_IGET_BYTE:
184 case OP_IGET_CHAR:
185 case OP_IGET_SHORT:
186 case OP_IPUT:
187 case OP_IPUT_WIDE:
188 case OP_IPUT_OBJECT:
189 case OP_IPUT_BOOLEAN:
190 case OP_IPUT_BYTE:
191 case OP_IPUT_CHAR:
192 case OP_IPUT_SHORT:
193 case OP_SGET:
194 case OP_SGET_WIDE:
195 case OP_SGET_OBJECT:
196 case OP_SGET_BOOLEAN:
197 case OP_SGET_BYTE:
198 case OP_SGET_CHAR:
199 case OP_SGET_SHORT:
200 case OP_SPUT:
201 case OP_SPUT_WIDE:
202 case OP_SPUT_OBJECT:
203 case OP_SPUT_BOOLEAN:
204 case OP_SPUT_BYTE:
205 case OP_SPUT_CHAR:
206 case OP_SPUT_SHORT:
207 case OP_ADD_INT:
208 case OP_SUB_INT:
209 case OP_MUL_INT:
210 case OP_DIV_INT:
211 case OP_REM_INT:
212 case OP_AND_INT:
213 case OP_OR_INT:
214 case OP_XOR_INT:
215 case OP_SHL_INT:
216 case OP_SHR_INT:
217 case OP_USHR_INT:
218 case OP_ADD_LONG:
219 case OP_SUB_LONG:
220 case OP_MUL_LONG:
221 case OP_DIV_LONG:
222 case OP_REM_LONG:
223 case OP_AND_LONG:
224 case OP_OR_LONG:
225 case OP_XOR_LONG:
226 case OP_SHL_LONG:
227 case OP_SHR_LONG:
228 case OP_USHR_LONG:
229 case OP_ADD_FLOAT:
230 case OP_SUB_FLOAT:
231 case OP_MUL_FLOAT:
232 case OP_DIV_FLOAT:
233 case OP_REM_FLOAT:
234 case OP_ADD_DOUBLE:
235 case OP_SUB_DOUBLE:
236 case OP_MUL_DOUBLE:
237 case OP_DIV_DOUBLE:
238 case OP_REM_DOUBLE:
239 case OP_ADD_INT_LIT16:
240 case OP_RSUB_INT:
241 case OP_MUL_INT_LIT16:
242 case OP_DIV_INT_LIT16:
243 case OP_REM_INT_LIT16:
244 case OP_AND_INT_LIT16:
245 case OP_OR_INT_LIT16:
246 case OP_XOR_INT_LIT16:
247 case OP_ADD_INT_LIT8:
248 case OP_RSUB_INT_LIT8:
249 case OP_MUL_INT_LIT8:
250 case OP_DIV_INT_LIT8:
251 case OP_REM_INT_LIT8:
252 case OP_AND_INT_LIT8:
253 case OP_OR_INT_LIT8:
254 case OP_XOR_INT_LIT8:
255 case OP_SHL_INT_LIT8:
256 case OP_SHR_INT_LIT8:
257 case OP_USHR_INT_LIT8:
258 width = 2;
259 break;
260
261 case OP_MOVE_16:
262 case OP_MOVE_WIDE_16:
263 case OP_MOVE_OBJECT_16:
264 case OP_CONST:
265 case OP_CONST_WIDE_32:
266 case OP_CONST_STRING_JUMBO:
267 case OP_GOTO_32:
268 case OP_FILLED_NEW_ARRAY:
269 case OP_FILLED_NEW_ARRAY_RANGE:
270 case OP_FILL_ARRAY_DATA:
271 case OP_PACKED_SWITCH:
272 case OP_SPARSE_SWITCH:
273 case OP_INVOKE_VIRTUAL:
274 case OP_INVOKE_SUPER:
275 case OP_INVOKE_DIRECT:
276 case OP_INVOKE_STATIC:
277 case OP_INVOKE_INTERFACE:
278 case OP_INVOKE_VIRTUAL_RANGE:
279 case OP_INVOKE_SUPER_RANGE:
280 case OP_INVOKE_DIRECT_RANGE:
281 case OP_INVOKE_STATIC_RANGE:
282 case OP_INVOKE_INTERFACE_RANGE:
283 width = 3;
284 break;
285
286 case OP_CONST_WIDE:
287 width = 5;
288 break;
289
290 /*
291 * Optimized instructions. We return negative size values for these
292 * to distinguish them.
293 */
294 case OP_IGET_QUICK:
295 case OP_IGET_WIDE_QUICK:
296 case OP_IGET_OBJECT_QUICK:
297 case OP_IPUT_QUICK:
298 case OP_IPUT_WIDE_QUICK:
299 case OP_IPUT_OBJECT_QUICK:
Andy McFaddenc35a2ef2010-06-17 12:36:00 -0700[diff] [blame^]300 case OP_IGET_VOLATILE:
301 case OP_IPUT_VOLATILE:
302 case OP_SGET_VOLATILE:
303 case OP_SPUT_VOLATILE:
304 case OP_IGET_OBJECT_VOLATILE:
305 case OP_IPUT_OBJECT_VOLATILE:
306 case OP_SGET_OBJECT_VOLATILE:
307 case OP_SPUT_OBJECT_VOLATILE:
Andy McFadden53878242010-03-05 07:24:27 -0800[diff] [blame]308 case OP_IGET_WIDE_VOLATILE:
309 case OP_IPUT_WIDE_VOLATILE:
310 case OP_SGET_WIDE_VOLATILE:
311 case OP_SPUT_WIDE_VOLATILE:
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]312 case OP_THROW_VERIFICATION_ERROR:
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]313 width = -2;
314 break;
315 case OP_INVOKE_VIRTUAL_QUICK:
316 case OP_INVOKE_VIRTUAL_QUICK_RANGE:
317 case OP_INVOKE_SUPER_QUICK:
318 case OP_INVOKE_SUPER_QUICK_RANGE:
319 case OP_EXECUTE_INLINE:
Andy McFaddenb0a05412009-11-19 10:23:41 -0800[diff] [blame]320 case OP_EXECUTE_INLINE_RANGE:
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]321 case OP_INVOKE_DIRECT_EMPTY:
322 width = -3;
323 break;
324
Andy McFadden96516932009-10-28 17:39:02 -0700[diff] [blame]325 /* these should never appear when scanning bytecode */
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]326 case OP_UNUSED_3E:
327 case OP_UNUSED_3F:
328 case OP_UNUSED_40:
329 case OP_UNUSED_41:
330 case OP_UNUSED_42:
331 case OP_UNUSED_43:
332 case OP_UNUSED_73:
333 case OP_UNUSED_79:
334 case OP_UNUSED_7A:
Andy McFadden96516932009-10-28 17:39:02 -0700[diff] [blame]335 case OP_BREAKPOINT:
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]336 case OP_UNUSED_F1:
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]337 case OP_UNUSED_FF:
338 assert(width == 0);
339 break;
340
341 /*
342 * DO NOT add a "default" clause here. Without it the compiler will
343 * complain if an instruction is missing (which is desirable).
344 */
345 }
346
347 instrWidth[opc] = width;
348 }
349
350 return instrWidth;
351}
352
353/*
354 * Generate a table that holds instruction flags.
355 */
356InstructionFlags* dexCreateInstrFlagsTable(void)
357{
358 InstructionFlags* instrFlags;
359 int i;
360
361 instrFlags = malloc(sizeof(InstructionFlags) * kNumDalvikInstructions);
362 if (instrFlags == NULL)
363 return NULL;
364
365 for (i = 0; i < kNumDalvikInstructions; i++) {
366 OpCode opc = (OpCode) i;
367 InstructionFlags flags = 0;
368
369 switch (opc) {
370 /* these don't affect the PC and can't cause an exception */
371 case OP_NOP:
372 case OP_MOVE:
373 case OP_MOVE_FROM16:
374 case OP_MOVE_16:
375 case OP_MOVE_WIDE:
376 case OP_MOVE_WIDE_FROM16:
377 case OP_MOVE_WIDE_16:
378 case OP_MOVE_OBJECT:
379 case OP_MOVE_OBJECT_FROM16:
380 case OP_MOVE_OBJECT_16:
381 case OP_MOVE_RESULT:
382 case OP_MOVE_RESULT_WIDE:
383 case OP_MOVE_RESULT_OBJECT:
384 case OP_MOVE_EXCEPTION:
385 case OP_CONST_4:
386 case OP_CONST_16:
387 case OP_CONST:
388 case OP_CONST_HIGH16:
389 case OP_CONST_WIDE_16:
390 case OP_CONST_WIDE_32:
391 case OP_CONST_WIDE:
392 case OP_CONST_WIDE_HIGH16:
393 case OP_FILL_ARRAY_DATA:
394 case OP_CMPL_FLOAT:
395 case OP_CMPG_FLOAT:
396 case OP_CMPL_DOUBLE:
397 case OP_CMPG_DOUBLE:
398 case OP_CMP_LONG:
399 case OP_NEG_INT:
400 case OP_NOT_INT:
401 case OP_NEG_LONG:
402 case OP_NOT_LONG:
403 case OP_NEG_FLOAT:
404 case OP_NEG_DOUBLE:
405 case OP_INT_TO_LONG:
406 case OP_INT_TO_FLOAT:
407 case OP_INT_TO_DOUBLE:
408 case OP_LONG_TO_INT:
409 case OP_LONG_TO_FLOAT:
410 case OP_LONG_TO_DOUBLE:
411 case OP_FLOAT_TO_INT:
412 case OP_FLOAT_TO_LONG:
413 case OP_FLOAT_TO_DOUBLE:
414 case OP_DOUBLE_TO_INT:
415 case OP_DOUBLE_TO_LONG:
416 case OP_DOUBLE_TO_FLOAT:
417 case OP_INT_TO_BYTE:
418 case OP_INT_TO_CHAR:
419 case OP_INT_TO_SHORT:
420 case OP_ADD_INT:
421 case OP_SUB_INT:
422 case OP_MUL_INT:
423 case OP_AND_INT:
424 case OP_OR_INT:
425 case OP_XOR_INT:
426 case OP_SHL_INT:
427 case OP_SHR_INT:
428 case OP_USHR_INT:
429 case OP_ADD_LONG:
430 case OP_SUB_LONG:
431 case OP_MUL_LONG:
432 case OP_AND_LONG:
433 case OP_OR_LONG:
434 case OP_XOR_LONG:
435 case OP_SHL_LONG:
436 case OP_SHR_LONG:
437 case OP_USHR_LONG:
438 case OP_ADD_FLOAT:
439 case OP_SUB_FLOAT:
440 case OP_MUL_FLOAT:
441 case OP_DIV_FLOAT:
442 case OP_REM_FLOAT:
443 case OP_ADD_DOUBLE:
444 case OP_SUB_DOUBLE:
445 case OP_MUL_DOUBLE:
446 case OP_DIV_DOUBLE: // div by zero just returns NaN
447 case OP_REM_DOUBLE:
448 case OP_ADD_INT_2ADDR:
449 case OP_SUB_INT_2ADDR:
450 case OP_MUL_INT_2ADDR:
451 case OP_AND_INT_2ADDR:
452 case OP_OR_INT_2ADDR:
453 case OP_XOR_INT_2ADDR:
454 case OP_SHL_INT_2ADDR:
455 case OP_SHR_INT_2ADDR:
456 case OP_USHR_INT_2ADDR:
457 case OP_ADD_LONG_2ADDR:
458 case OP_SUB_LONG_2ADDR:
459 case OP_MUL_LONG_2ADDR:
460 case OP_AND_LONG_2ADDR:
461 case OP_OR_LONG_2ADDR:
462 case OP_XOR_LONG_2ADDR:
463 case OP_SHL_LONG_2ADDR:
464 case OP_SHR_LONG_2ADDR:
465 case OP_USHR_LONG_2ADDR:
466 case OP_ADD_FLOAT_2ADDR:
467 case OP_SUB_FLOAT_2ADDR:
468 case OP_MUL_FLOAT_2ADDR:
469 case OP_DIV_FLOAT_2ADDR:
470 case OP_REM_FLOAT_2ADDR:
471 case OP_ADD_DOUBLE_2ADDR:
472 case OP_SUB_DOUBLE_2ADDR:
473 case OP_MUL_DOUBLE_2ADDR:
474 case OP_DIV_DOUBLE_2ADDR:
475 case OP_REM_DOUBLE_2ADDR:
476 case OP_ADD_INT_LIT16:
477 case OP_RSUB_INT:
478 case OP_MUL_INT_LIT16:
479 case OP_AND_INT_LIT16:
480 case OP_OR_INT_LIT16:
481 case OP_XOR_INT_LIT16:
482 case OP_ADD_INT_LIT8:
483 case OP_RSUB_INT_LIT8:
484 case OP_MUL_INT_LIT8:
485 case OP_AND_INT_LIT8:
486 case OP_OR_INT_LIT8:
487 case OP_XOR_INT_LIT8:
488 case OP_SHL_INT_LIT8:
489 case OP_SHR_INT_LIT8:
490 case OP_USHR_INT_LIT8:
491 flags = kInstrCanContinue;
492 break;
493
494 /* these don't affect the PC, but can cause exceptions */
495 case OP_CONST_STRING:
496 case OP_CONST_STRING_JUMBO:
497 case OP_CONST_CLASS:
498 case OP_MONITOR_ENTER:
499 case OP_MONITOR_EXIT:
500 case OP_CHECK_CAST:
501 case OP_INSTANCE_OF:
502 case OP_ARRAY_LENGTH:
503 case OP_NEW_INSTANCE:
504 case OP_NEW_ARRAY:
505 case OP_FILLED_NEW_ARRAY:
506 case OP_FILLED_NEW_ARRAY_RANGE:
507 case OP_AGET:
508 case OP_AGET_BOOLEAN:
509 case OP_AGET_BYTE:
510 case OP_AGET_CHAR:
511 case OP_AGET_SHORT:
512 case OP_AGET_WIDE:
513 case OP_AGET_OBJECT:
514 case OP_APUT:
515 case OP_APUT_BOOLEAN:
516 case OP_APUT_BYTE:
517 case OP_APUT_CHAR:
518 case OP_APUT_SHORT:
519 case OP_APUT_WIDE:
520 case OP_APUT_OBJECT:
521 case OP_IGET:
522 case OP_IGET_BOOLEAN:
523 case OP_IGET_BYTE:
524 case OP_IGET_CHAR:
525 case OP_IGET_SHORT:
526 case OP_IGET_WIDE:
527 case OP_IGET_OBJECT:
528 case OP_IPUT:
529 case OP_IPUT_BOOLEAN:
530 case OP_IPUT_BYTE:
531 case OP_IPUT_CHAR:
532 case OP_IPUT_SHORT:
533 case OP_IPUT_WIDE:
534 case OP_IPUT_OBJECT:
535 case OP_SGET:
536 case OP_SGET_BOOLEAN:
537 case OP_SGET_BYTE:
538 case OP_SGET_CHAR:
539 case OP_SGET_SHORT:
540 case OP_SGET_WIDE:
541 case OP_SGET_OBJECT:
542 case OP_SPUT:
543 case OP_SPUT_BOOLEAN:
544 case OP_SPUT_BYTE:
545 case OP_SPUT_CHAR:
546 case OP_SPUT_SHORT:
547 case OP_SPUT_WIDE:
548 case OP_SPUT_OBJECT:
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]549 case OP_DIV_INT:
550 case OP_REM_INT:
551 case OP_DIV_LONG:
552 case OP_REM_LONG:
553 case OP_DIV_INT_2ADDR:
554 case OP_REM_INT_2ADDR:
555 case OP_DIV_LONG_2ADDR:
556 case OP_REM_LONG_2ADDR:
557 case OP_DIV_INT_LIT16:
558 case OP_REM_INT_LIT16:
559 case OP_DIV_INT_LIT8:
560 case OP_REM_INT_LIT8:
561 flags = kInstrCanContinue | kInstrCanThrow;
562 break;
563
Ben Chengba4fc8b2009-06-01 13:00:29 -0700[diff] [blame]564 case OP_INVOKE_VIRTUAL:
565 case OP_INVOKE_VIRTUAL_RANGE:
566 case OP_INVOKE_SUPER:
567 case OP_INVOKE_SUPER_RANGE:
568 case OP_INVOKE_DIRECT:
569 case OP_INVOKE_DIRECT_RANGE:
570 case OP_INVOKE_STATIC:
571 case OP_INVOKE_STATIC_RANGE:
572 case OP_INVOKE_INTERFACE:
573 case OP_INVOKE_INTERFACE_RANGE:
574 flags = kInstrCanContinue | kInstrCanThrow | kInstrInvoke;
575 break;
576
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]577 case OP_RETURN_VOID:
578 case OP_RETURN:
579 case OP_RETURN_WIDE:
580 case OP_RETURN_OBJECT:
581 flags = kInstrCanReturn;
582 break;
583
584 case OP_THROW:
585 flags = kInstrCanThrow;
586 break;
587
588 /* unconditional branches */
589 case OP_GOTO:
590 case OP_GOTO_16:
591 case OP_GOTO_32:
Ben Chengba4fc8b2009-06-01 13:00:29 -0700[diff] [blame]592 flags = kInstrCanBranch | kInstrUnconditional;
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]593 break;
594
595 /* conditional branches */
596 case OP_IF_EQ:
597 case OP_IF_NE:
598 case OP_IF_LT:
599 case OP_IF_GE:
600 case OP_IF_GT:
601 case OP_IF_LE:
602 case OP_IF_EQZ:
603 case OP_IF_NEZ:
604 case OP_IF_LTZ:
605 case OP_IF_GEZ:
606 case OP_IF_GTZ:
607 case OP_IF_LEZ:
608 flags = kInstrCanBranch | kInstrCanContinue;
609 break;
610
611 /* switch statements; if value not in switch, it continues */
612 case OP_PACKED_SWITCH:
613 case OP_SPARSE_SWITCH:
614 flags = kInstrCanSwitch | kInstrCanContinue;
615 break;
616
Andy McFaddenb51ea112009-05-08 16:50:17 -0700[diff] [blame]617 /* verifier/optimizer-generated instructions */
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]618 case OP_THROW_VERIFICATION_ERROR:
619 flags = kInstrCanThrow;
620 break;
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]621 case OP_EXECUTE_INLINE:
Andy McFaddenb0a05412009-11-19 10:23:41 -0800[diff] [blame]622 case OP_EXECUTE_INLINE_RANGE:
623 flags = kInstrCanContinue | kInstrCanThrow;
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]624 break;
625 case OP_IGET_QUICK:
626 case OP_IGET_WIDE_QUICK:
627 case OP_IGET_OBJECT_QUICK:
628 case OP_IPUT_QUICK:
629 case OP_IPUT_WIDE_QUICK:
630 case OP_IPUT_OBJECT_QUICK:
Andy McFaddenc35a2ef2010-06-17 12:36:00 -0700[diff] [blame^]631 case OP_IGET_VOLATILE:
632 case OP_IPUT_VOLATILE:
633 case OP_SGET_VOLATILE:
634 case OP_SPUT_VOLATILE:
635 case OP_IGET_OBJECT_VOLATILE:
636 case OP_IPUT_OBJECT_VOLATILE:
637 case OP_SGET_OBJECT_VOLATILE:
638 case OP_SPUT_OBJECT_VOLATILE:
Andy McFadden53878242010-03-05 07:24:27 -0800[diff] [blame]639 case OP_IGET_WIDE_VOLATILE:
640 case OP_IPUT_WIDE_VOLATILE:
641 case OP_SGET_WIDE_VOLATILE:
642 case OP_SPUT_WIDE_VOLATILE:
Ben Chengba4fc8b2009-06-01 13:00:29 -0700[diff] [blame]643 flags = kInstrCanContinue | kInstrCanThrow;
644 break;
645
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]646 case OP_INVOKE_VIRTUAL_QUICK:
647 case OP_INVOKE_VIRTUAL_QUICK_RANGE:
648 case OP_INVOKE_SUPER_QUICK:
649 case OP_INVOKE_SUPER_QUICK_RANGE:
650 case OP_INVOKE_DIRECT_EMPTY:
Ben Chengba4fc8b2009-06-01 13:00:29 -0700[diff] [blame]651 flags = kInstrCanContinue | kInstrCanThrow | kInstrInvoke;
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]652 break;
653
Andy McFadden96516932009-10-28 17:39:02 -0700[diff] [blame]654 /* these should never appear when scanning code */
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]655 case OP_UNUSED_3E:
656 case OP_UNUSED_3F:
657 case OP_UNUSED_40:
658 case OP_UNUSED_41:
659 case OP_UNUSED_42:
660 case OP_UNUSED_43:
661 case OP_UNUSED_73:
662 case OP_UNUSED_79:
663 case OP_UNUSED_7A:
Andy McFadden96516932009-10-28 17:39:02 -0700[diff] [blame]664 case OP_BREAKPOINT:
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]665 case OP_UNUSED_F1:
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]666 case OP_UNUSED_FF:
667 break;
668
669 /*
670 * DO NOT add a "default" clause here. Without it the compiler will
671 * complain if an instruction is missing (which is desirable).
672 */
673 }
674
675 instrFlags[opc] = flags;
676 }
677
678 return instrFlags;
679}
680
681/*
682 * Allocate and populate a 256-element array with instruction formats.
683 * Used in conjunction with dexDecodeInstruction.
684 */
685InstructionFormat* dexCreateInstrFormatTable(void)
686{
687 InstructionFormat* instFmt;
688 int i;
689
690 instFmt = malloc(sizeof(InstructionFormat) * kNumDalvikInstructions);
691 if (instFmt == NULL)
692 return NULL;
693
694 for (i = 0; i < kNumDalvikInstructions; i++) {
695 OpCode opc = (OpCode) i;
696 InstructionFormat fmt = kFmtUnknown;
697
698 switch (opc) {
699 case OP_GOTO:
700 fmt = kFmt10t;
701 break;
702 case OP_NOP:
703 case OP_RETURN_VOID:
704 fmt = kFmt10x;
705 break;
706 case OP_CONST_4:
707 fmt = kFmt11n;
708 break;
709 case OP_CONST_HIGH16:
710 case OP_CONST_WIDE_HIGH16:
711 fmt = kFmt21h;
712 break;
713 case OP_MOVE_RESULT:
714 case OP_MOVE_RESULT_WIDE:
715 case OP_MOVE_RESULT_OBJECT:
716 case OP_MOVE_EXCEPTION:
717 case OP_RETURN:
718 case OP_RETURN_WIDE:
719 case OP_RETURN_OBJECT:
720 case OP_MONITOR_ENTER:
721 case OP_MONITOR_EXIT:
722 case OP_THROW:
723 fmt = kFmt11x;
724 break;
725 case OP_MOVE:
726 case OP_MOVE_WIDE:
727 case OP_MOVE_OBJECT:
728 case OP_ARRAY_LENGTH:
729 case OP_NEG_INT:
730 case OP_NOT_INT:
731 case OP_NEG_LONG:
732 case OP_NOT_LONG:
733 case OP_NEG_FLOAT:
734 case OP_NEG_DOUBLE:
735 case OP_INT_TO_LONG:
736 case OP_INT_TO_FLOAT:
737 case OP_INT_TO_DOUBLE:
738 case OP_LONG_TO_INT:
739 case OP_LONG_TO_FLOAT:
740 case OP_LONG_TO_DOUBLE:
741 case OP_FLOAT_TO_INT:
742 case OP_FLOAT_TO_LONG:
743 case OP_FLOAT_TO_DOUBLE:
744 case OP_DOUBLE_TO_INT:
745 case OP_DOUBLE_TO_LONG:
746 case OP_DOUBLE_TO_FLOAT:
747 case OP_INT_TO_BYTE:
748 case OP_INT_TO_CHAR:
749 case OP_INT_TO_SHORT:
750 case OP_ADD_INT_2ADDR:
751 case OP_SUB_INT_2ADDR:
752 case OP_MUL_INT_2ADDR:
753 case OP_DIV_INT_2ADDR:
754 case OP_REM_INT_2ADDR:
755 case OP_AND_INT_2ADDR:
756 case OP_OR_INT_2ADDR:
757 case OP_XOR_INT_2ADDR:
758 case OP_SHL_INT_2ADDR:
759 case OP_SHR_INT_2ADDR:
760 case OP_USHR_INT_2ADDR:
761 case OP_ADD_LONG_2ADDR:
762 case OP_SUB_LONG_2ADDR:
763 case OP_MUL_LONG_2ADDR:
764 case OP_DIV_LONG_2ADDR:
765 case OP_REM_LONG_2ADDR:
766 case OP_AND_LONG_2ADDR:
767 case OP_OR_LONG_2ADDR:
768 case OP_XOR_LONG_2ADDR:
769 case OP_SHL_LONG_2ADDR:
770 case OP_SHR_LONG_2ADDR:
771 case OP_USHR_LONG_2ADDR:
772 case OP_ADD_FLOAT_2ADDR:
773 case OP_SUB_FLOAT_2ADDR:
774 case OP_MUL_FLOAT_2ADDR:
775 case OP_DIV_FLOAT_2ADDR:
776 case OP_REM_FLOAT_2ADDR:
777 case OP_ADD_DOUBLE_2ADDR:
778 case OP_SUB_DOUBLE_2ADDR:
779 case OP_MUL_DOUBLE_2ADDR:
780 case OP_DIV_DOUBLE_2ADDR:
781 case OP_REM_DOUBLE_2ADDR:
782 fmt = kFmt12x;
783 break;
784 case OP_GOTO_16:
785 fmt = kFmt20t;
786 break;
787 case OP_GOTO_32:
788 fmt = kFmt30t;
789 break;
790 case OP_CONST_STRING:
791 case OP_CONST_CLASS:
792 case OP_CHECK_CAST:
793 case OP_NEW_INSTANCE:
794 case OP_SGET:
795 case OP_SGET_WIDE:
796 case OP_SGET_OBJECT:
797 case OP_SGET_BOOLEAN:
798 case OP_SGET_BYTE:
799 case OP_SGET_CHAR:
800 case OP_SGET_SHORT:
801 case OP_SPUT:
802 case OP_SPUT_WIDE:
803 case OP_SPUT_OBJECT:
804 case OP_SPUT_BOOLEAN:
805 case OP_SPUT_BYTE:
806 case OP_SPUT_CHAR:
807 case OP_SPUT_SHORT:
808 fmt = kFmt21c;
809 break;
810 case OP_CONST_16:
811 case OP_CONST_WIDE_16:
812 fmt = kFmt21s;
813 break;
814 case OP_IF_EQZ:
815 case OP_IF_NEZ:
816 case OP_IF_LTZ:
817 case OP_IF_GEZ:
818 case OP_IF_GTZ:
819 case OP_IF_LEZ:
820 fmt = kFmt21t;
821 break;
822 case OP_FILL_ARRAY_DATA:
823 case OP_PACKED_SWITCH:
824 case OP_SPARSE_SWITCH:
825 fmt = kFmt31t;
826 break;
827 case OP_ADD_INT_LIT8:
828 case OP_RSUB_INT_LIT8:
829 case OP_MUL_INT_LIT8:
830 case OP_DIV_INT_LIT8:
831 case OP_REM_INT_LIT8:
832 case OP_AND_INT_LIT8:
833 case OP_OR_INT_LIT8:
834 case OP_XOR_INT_LIT8:
835 case OP_SHL_INT_LIT8:
836 case OP_SHR_INT_LIT8:
837 case OP_USHR_INT_LIT8:
838 fmt = kFmt22b;
839 break;
840 case OP_INSTANCE_OF:
841 case OP_NEW_ARRAY:
842 case OP_IGET:
843 case OP_IGET_WIDE:
844 case OP_IGET_OBJECT:
845 case OP_IGET_BOOLEAN:
846 case OP_IGET_BYTE:
847 case OP_IGET_CHAR:
848 case OP_IGET_SHORT:
849 case OP_IPUT:
850 case OP_IPUT_WIDE:
851 case OP_IPUT_OBJECT:
852 case OP_IPUT_BOOLEAN:
853 case OP_IPUT_BYTE:
854 case OP_IPUT_CHAR:
855 case OP_IPUT_SHORT:
856 fmt = kFmt22c;
857 break;
858 case OP_ADD_INT_LIT16:
859 case OP_RSUB_INT:
860 case OP_MUL_INT_LIT16:
861 case OP_DIV_INT_LIT16:
862 case OP_REM_INT_LIT16:
863 case OP_AND_INT_LIT16:
864 case OP_OR_INT_LIT16:
865 case OP_XOR_INT_LIT16:
866 fmt = kFmt22s;
867 break;
868 case OP_IF_EQ:
869 case OP_IF_NE:
870 case OP_IF_LT:
871 case OP_IF_GE:
872 case OP_IF_GT:
873 case OP_IF_LE:
874 fmt = kFmt22t;
875 break;
876 case OP_MOVE_FROM16:
877 case OP_MOVE_WIDE_FROM16:
878 case OP_MOVE_OBJECT_FROM16:
879 fmt = kFmt22x;
880 break;
881 case OP_CMPL_FLOAT:
882 case OP_CMPG_FLOAT:
883 case OP_CMPL_DOUBLE:
884 case OP_CMPG_DOUBLE:
885 case OP_CMP_LONG:
886 case OP_AGET:
887 case OP_AGET_WIDE:
888 case OP_AGET_OBJECT:
889 case OP_AGET_BOOLEAN:
890 case OP_AGET_BYTE:
891 case OP_AGET_CHAR:
892 case OP_AGET_SHORT:
893 case OP_APUT:
894 case OP_APUT_WIDE:
895 case OP_APUT_OBJECT:
896 case OP_APUT_BOOLEAN:
897 case OP_APUT_BYTE:
898 case OP_APUT_CHAR:
899 case OP_APUT_SHORT:
900 case OP_ADD_INT:
901 case OP_SUB_INT:
902 case OP_MUL_INT:
903 case OP_DIV_INT:
904 case OP_REM_INT:
905 case OP_AND_INT:
906 case OP_OR_INT:
907 case OP_XOR_INT:
908 case OP_SHL_INT:
909 case OP_SHR_INT:
910 case OP_USHR_INT:
911 case OP_ADD_LONG:
912 case OP_SUB_LONG:
913 case OP_MUL_LONG:
914 case OP_DIV_LONG:
915 case OP_REM_LONG:
916 case OP_AND_LONG:
917 case OP_OR_LONG:
918 case OP_XOR_LONG:
919 case OP_SHL_LONG:
920 case OP_SHR_LONG:
921 case OP_USHR_LONG:
922 case OP_ADD_FLOAT:
923 case OP_SUB_FLOAT:
924 case OP_MUL_FLOAT:
925 case OP_DIV_FLOAT:
926 case OP_REM_FLOAT:
927 case OP_ADD_DOUBLE:
928 case OP_SUB_DOUBLE:
929 case OP_MUL_DOUBLE:
930 case OP_DIV_DOUBLE:
931 case OP_REM_DOUBLE:
932 fmt = kFmt23x;
933 break;
934 case OP_CONST:
935 case OP_CONST_WIDE_32:
936 fmt = kFmt31i;
937 break;
938 case OP_CONST_STRING_JUMBO:
939 fmt = kFmt31c;
940 break;
941 case OP_MOVE_16:
942 case OP_MOVE_WIDE_16:
943 case OP_MOVE_OBJECT_16:
944 fmt = kFmt32x;
945 break;
946 case OP_FILLED_NEW_ARRAY:
947 case OP_INVOKE_VIRTUAL:
948 case OP_INVOKE_SUPER:
949 case OP_INVOKE_DIRECT:
950 case OP_INVOKE_STATIC:
951 case OP_INVOKE_INTERFACE:
952 fmt = kFmt35c;
953 break;
954 case OP_FILLED_NEW_ARRAY_RANGE:
955 case OP_INVOKE_VIRTUAL_RANGE:
956 case OP_INVOKE_SUPER_RANGE:
957 case OP_INVOKE_DIRECT_RANGE:
958 case OP_INVOKE_STATIC_RANGE:
959 case OP_INVOKE_INTERFACE_RANGE:
960 fmt = kFmt3rc;
961 break;
962 case OP_CONST_WIDE:
963 fmt = kFmt51l;
964 break;
965
966 /*
967 * Optimized instructions.
968 */
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]969 case OP_THROW_VERIFICATION_ERROR:
970 fmt = kFmt20bc;
971 break;
Andy McFadden53878242010-03-05 07:24:27 -0800[diff] [blame]972 case OP_IGET_WIDE_VOLATILE:
973 case OP_IPUT_WIDE_VOLATILE:
974 case OP_SGET_WIDE_VOLATILE:
975 case OP_SPUT_WIDE_VOLATILE:
Andy McFaddenc35a2ef2010-06-17 12:36:00 -0700[diff] [blame^]976 case OP_IGET_VOLATILE:
977 case OP_IPUT_VOLATILE:
978 case OP_SGET_VOLATILE:
979 case OP_SPUT_VOLATILE:
980 case OP_IGET_OBJECT_VOLATILE:
981 case OP_IPUT_OBJECT_VOLATILE:
982 case OP_SGET_OBJECT_VOLATILE:
983 case OP_SPUT_OBJECT_VOLATILE:
Andy McFadden53878242010-03-05 07:24:27 -0800[diff] [blame]984 fmt = kFmt22c;
985 break;
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]986 case OP_IGET_QUICK:
987 case OP_IGET_WIDE_QUICK:
988 case OP_IGET_OBJECT_QUICK:
989 case OP_IPUT_QUICK:
990 case OP_IPUT_WIDE_QUICK:
991 case OP_IPUT_OBJECT_QUICK:
992 fmt = kFmt22cs;
993 break;
994 case OP_INVOKE_VIRTUAL_QUICK:
995 case OP_INVOKE_SUPER_QUICK:
996 fmt = kFmt35ms;
997 break;
998 case OP_INVOKE_VIRTUAL_QUICK_RANGE:
999 case OP_INVOKE_SUPER_QUICK_RANGE:
1000 fmt = kFmt3rms;
1001 break;
1002 case OP_EXECUTE_INLINE:
1003 fmt = kFmt3inline;
1004 break;
Andy McFaddenb0a05412009-11-19 10:23:41 -0800[diff] [blame]1005 case OP_EXECUTE_INLINE_RANGE:
1006 fmt = kFmt3rinline;
1007 break;
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1008 case OP_INVOKE_DIRECT_EMPTY:
1009 fmt = kFmt35c;
1010 break;
1011
Andy McFadden96516932009-10-28 17:39:02 -0700[diff] [blame]1012 /* these should never appear when scanning code */
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1013 case OP_UNUSED_3E:
1014 case OP_UNUSED_3F:
1015 case OP_UNUSED_40:
1016 case OP_UNUSED_41:
1017 case OP_UNUSED_42:
1018 case OP_UNUSED_43:
1019 case OP_UNUSED_73:
1020 case OP_UNUSED_79:
1021 case OP_UNUSED_7A:
Andy McFadden96516932009-10-28 17:39:02 -0700[diff] [blame]1022 case OP_BREAKPOINT:
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1023 case OP_UNUSED_F1:
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1024 case OP_UNUSED_FF:
1025 fmt = kFmtUnknown;
1026 break;
1027
1028 /*
1029 * DO NOT add a "default" clause here. Without it the compiler will
1030 * complain if an instruction is missing (which is desirable).
1031 */
1032 }
1033
1034 instFmt[opc] = fmt;
1035 }
1036
1037 return instFmt;
1038}
1039
1040/*
1041 * Copied from InterpCore.h. Used for instruction decoding.
1042 */
1043#define FETCH(_offset) (insns[(_offset)])
1044#define INST_INST(_inst) ((_inst) & 0xff)
1045#define INST_A(_inst) (((u2)(_inst) >> 8) & 0x0f)
1046#define INST_B(_inst) ((u2)(_inst) >> 12)
1047#define INST_AA(_inst) ((_inst) >> 8)
1048
1049/*
1050 * Decode the instruction pointed to by "insns".
1051 *
1052 * Fills out the pieces of "pDec" that are affected by the current
1053 * instruction. Does not touch anything else.
1054 */
1055void dexDecodeInstruction(const InstructionFormat* fmts, const u2* insns,
1056 DecodedInstruction* pDec)
1057{
1058 u2 inst = *insns;
1059
1060 pDec->opCode = (OpCode) INST_INST(inst);
1061
1062 switch (dexGetInstrFormat(fmts, pDec->opCode)) {
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1063 case kFmt10x: // op
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1064 /* nothing to do; copy the AA bits out for the verifier */
1065 pDec->vA = INST_AA(inst);
1066 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1067 case kFmt12x: // op vA, vB
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1068 pDec->vA = INST_A(inst);
1069 pDec->vB = INST_B(inst);
1070 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1071 case kFmt11n: // op vA, #+B
Carl Shapirode750892010-06-08 16:37:12 -0700[diff] [blame]1072 pDec->vA = INST_A(inst);
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1073 pDec->vB = (s4) (INST_B(inst) << 28) >> 28; // sign extend 4-bit value
1074 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1075 case kFmt11x: // op vAA
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1076 pDec->vA = INST_AA(inst);
1077 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1078 case kFmt10t: // op +AA
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1079 pDec->vA = (s1) INST_AA(inst); // sign-extend 8-bit value
1080 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1081 case kFmt20t: // op +AAAA
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1082 pDec->vA = (s2) FETCH(1); // sign-extend 16-bit value
1083 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1084 case kFmt20bc: // op AA, thing@BBBB
1085 case kFmt21c: // op vAA, thing@BBBB
1086 case kFmt22x: // op vAA, vBBBB
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1087 pDec->vA = INST_AA(inst);
1088 pDec->vB = FETCH(1);
1089 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1090 case kFmt21s: // op vAA, #+BBBB
1091 case kFmt21t: // op vAA, +BBBB
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1092 pDec->vA = INST_AA(inst);
1093 pDec->vB = (s2) FETCH(1); // sign-extend 16-bit value
1094 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1095 case kFmt21h: // op vAA, #+BBBB0000[00000000]
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1096 pDec->vA = INST_AA(inst);
1097 /*
1098 * The value should be treated as right-zero-extended, but we don't
1099 * actually do that here. Among other things, we don't know if it's
1100 * the top bits of a 32- or 64-bit value.
1101 */
1102 pDec->vB = FETCH(1);
1103 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1104 case kFmt23x: // op vAA, vBB, vCC
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1105 pDec->vA = INST_AA(inst);
1106 pDec->vB = FETCH(1) & 0xff;
1107 pDec->vC = FETCH(1) >> 8;
1108 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1109 case kFmt22b: // op vAA, vBB, #+CC
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1110 pDec->vA = INST_AA(inst);
1111 pDec->vB = FETCH(1) & 0xff;
1112 pDec->vC = (s1) (FETCH(1) >> 8); // sign-extend 8-bit value
1113 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1114 case kFmt22s: // op vA, vB, #+CCCC
1115 case kFmt22t: // op vA, vB, +CCCC
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1116 pDec->vA = INST_A(inst);
1117 pDec->vB = INST_B(inst);
1118 pDec->vC = (s2) FETCH(1); // sign-extend 16-bit value
1119 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1120 case kFmt22c: // op vA, vB, thing@CCCC
1121 case kFmt22cs: // [opt] op vA, vB, field offset CCCC
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1122 pDec->vA = INST_A(inst);
1123 pDec->vB = INST_B(inst);
1124 pDec->vC = FETCH(1);
1125 break;
1126 case kFmt30t: // op +AAAAAAAA
1127 pDec->vA = FETCH(1) | ((u4) FETCH(2) << 16); // signed 32-bit value
1128 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1129 case kFmt31t: // op vAA, +BBBBBBBB
1130 case kFmt31c: // op vAA, thing@BBBBBBBB
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1131 pDec->vA = INST_AA(inst);
1132 pDec->vB = FETCH(1) | ((u4) FETCH(2) << 16); // 32-bit value
1133 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1134 case kFmt32x: // op vAAAA, vBBBB
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1135 pDec->vA = FETCH(1);
1136 pDec->vB = FETCH(2);
1137 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1138 case kFmt31i: // op vAA, #+BBBBBBBB
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1139 pDec->vA = INST_AA(inst);
1140 pDec->vB = FETCH(1) | ((u4) FETCH(2) << 16);
1141 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1142 case kFmt35c: // op vB, {vD..vG,vA}, thing@CCCC
1143 case kFmt35ms: // [opt] invoke-virtual+super
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1144 {
1145 /*
1146 * The lettering changes that came about when we went from 4 args
1147 * to 5 made the "range" versions of the calls different from
1148 * the non-range versions. We have the choice between decoding
1149 * them the way the spec shows and having lots of conditionals
1150 * in the verifier, or mapping the values onto their original
1151 * registers and leaving the verifier intact.
1152 *
1153 * Current plan is to leave the verifier alone. We can fix it
1154 * later if it's architecturally unbearable.
1155 *
1156 * Bottom line: method constant is always in vB.
1157 */
1158 u2 regList;
1159 int i, count;
1160
1161 pDec->vA = INST_B(inst);
1162 pDec->vB = FETCH(1);
1163 regList = FETCH(2);
1164
1165 if (pDec->vA > 5) {
1166 LOGW("Invalid arg count in 35c/35ms (%d)\n", pDec->vA);
1167 goto bail;
1168 }
1169 count = pDec->vA;
1170 if (count == 5) {
1171 /* 5th arg comes from A field in instruction */
1172 pDec->arg[4] = INST_A(inst);
1173 count--;
1174 }
1175 for (i = 0; i < count; i++) {
1176 pDec->arg[i] = regList & 0x0f;
1177 regList >>= 4;
1178 }
1179 /* copy arg[0] to vC; we don't have vD/vE/vF, so ignore those */
1180 if (pDec->vA > 0)
1181 pDec->vC = pDec->arg[0];
1182 }
1183 break;
Andy McFadden3a1aedb2009-05-07 13:30:23 -0700[diff] [blame]1184 case kFmt3inline: // [opt] inline invoke
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1185 {
1186 u2 regList;
1187 int i;
1188
1189 pDec->vA = INST_B(inst);
1190 pDec->vB = FETCH(1);
1191 regList = FETCH(2);
1192
1193 if (pDec->vA > 4) {
1194 LOGW("Invalid arg count in 3inline (%d)\n", pDec->vA);
1195 goto bail;
1196 }
1197 for (i = 0; i < (int) pDec->vA; i++) {
1198 pDec->arg[i] = regList & 0x0f;
1199 regList >>= 4;
1200 }
1201 /* copy arg[0] to vC; we don't have vD/vE/vF, so ignore those */
1202 if (pDec->vA > 0)
1203 pDec->vC = pDec->arg[0];
1204 }
1205 break;
1206 case kFmt35fs: // [opt] invoke-interface
1207 assert(false); // TODO
1208 break;
1209 case kFmt3rc: // op {vCCCC .. v(CCCC+AA-1)}, meth@BBBB
1210 case kFmt3rms: // [opt] invoke-virtual+super/range
Andy McFaddenb0a05412009-11-19 10:23:41 -0800[diff] [blame]1211 case kFmt3rinline: // [opt] execute-inline/range
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1212 pDec->vA = INST_AA(inst);
1213 pDec->vB = FETCH(1);
1214 pDec->vC = FETCH(2);
1215 break;
1216 case kFmt3rfs: // [opt] invoke-interface/range
1217 assert(false); // TODO
1218 break;
1219 case kFmt51l: // op vAA, #+BBBBBBBBBBBBBBBB
1220 pDec->vA = INST_AA(inst);
1221 pDec->vB_wide = FETCH(1);
1222 pDec->vB_wide |= (u8)FETCH(2) << 16;
1223 pDec->vB_wide |= (u8)FETCH(3) << 32;
1224 pDec->vB_wide |= (u8)FETCH(4) << 48;
1225 break;
1226 default:
1227 LOGW("Can't decode unexpected format %d (op=%d)\n",
1228 dexGetInstrFormat(fmts, pDec->opCode), pDec->opCode);
1229 assert(false);
1230 break;
1231 }
1232
1233bail:
1234 ;
1235}
1236
1237/*
1238 * Return the width of the specified instruction, or 0 if not defined. Also
1239 * works for special OP_NOP entries, including switch statement data tables
1240 * and array data.
1241 */
Andy McFadden228a6b02010-05-04 15:02:32 -0700[diff] [blame]1242size_t dexGetInstrOrTableWidthAbs(const InstructionWidth* widths,
1243 const u2* insns)
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1244{
Andy McFadden228a6b02010-05-04 15:02:32 -0700[diff] [blame]1245 size_t width;
The Android Open Source Projectf6c38712009-03-03 19:28:47 -0800[diff] [blame]1246
1247 if (*insns == kPackedSwitchSignature) {
1248 width = 4 + insns[1] * 2;
1249 } else if (*insns == kSparseSwitchSignature) {
1250 width = 2 + insns[1] * 4;
1251 } else if (*insns == kArrayDataSignature) {
1252 u2 elemWidth = insns[1];
1253 u4 len = insns[2] | (((u4)insns[3]) << 16);
1254 width = 4 + (elemWidth * len + 1) / 2;
1255 } else {
1256 width = dexGetInstrWidthAbs(widths, INST_INST(insns[0]));
1257 }
1258 return width;
1259}