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878ddf1f | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | EbcExecute.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | Contains code that implements the virtual machine.\r | |
19 | \r | |
20 | --*/\r | |
21 | \r | |
22 | #include "EbcInt.h"\r | |
23 | #include "EbcExecute.h"\r | |
24 | \r | |
25 | //\r | |
26 | // VM major/minor version\r | |
27 | //\r | |
28 | #define VM_MAJOR_VERSION 1\r | |
29 | #define VM_MINOR_VERSION 0\r | |
30 | \r | |
31 | //\r | |
32 | // Define some useful data size constants to allow switch statements based on\r | |
33 | // size of operands or data.\r | |
34 | //\r | |
35 | #define DATA_SIZE_INVALID 0\r | |
36 | #define DATA_SIZE_8 1\r | |
37 | #define DATA_SIZE_16 2\r | |
38 | #define DATA_SIZE_32 4\r | |
39 | #define DATA_SIZE_64 8\r | |
40 | #define DATA_SIZE_N 48 // 4 or 8\r | |
41 | //\r | |
42 | // Structure we'll use to dispatch opcodes to execute functions.\r | |
43 | //\r | |
44 | typedef struct {\r | |
45 | EFI_STATUS (*ExecuteFunction) (IN VM_CONTEXT * VmPtr);\r | |
46 | }\r | |
47 | VM_TABLE_ENTRY;\r | |
48 | \r | |
49 | typedef\r | |
50 | UINT64\r | |
51 | (*DATA_MANIP_EXEC_FUNCTION) (\r | |
52 | IN VM_CONTEXT * VmPtr,\r | |
53 | IN UINT64 Op1,\r | |
54 | IN UINT64 Op2\r | |
55 | );\r | |
56 | \r | |
57 | STATIC\r | |
58 | INT16\r | |
59 | VmReadIndex16 (\r | |
60 | IN VM_CONTEXT *VmPtr,\r | |
61 | IN UINT32 CodeOffset\r | |
62 | );\r | |
63 | \r | |
64 | STATIC\r | |
65 | INT32\r | |
66 | VmReadIndex32 (\r | |
67 | IN VM_CONTEXT *VmPtr,\r | |
68 | IN UINT32 CodeOffset\r | |
69 | );\r | |
70 | \r | |
71 | STATIC\r | |
72 | INT64\r | |
73 | VmReadIndex64 (\r | |
74 | IN VM_CONTEXT *VmPtr,\r | |
75 | IN UINT32 CodeOffset\r | |
76 | );\r | |
77 | \r | |
78 | STATIC\r | |
79 | UINT8\r | |
80 | VmReadMem8 (\r | |
81 | IN VM_CONTEXT *VmPtr,\r | |
82 | IN UINTN Addr\r | |
83 | );\r | |
84 | \r | |
85 | STATIC\r | |
86 | UINT16\r | |
87 | VmReadMem16 (\r | |
88 | IN VM_CONTEXT *VmPtr,\r | |
89 | IN UINTN Addr\r | |
90 | );\r | |
91 | \r | |
92 | STATIC\r | |
93 | UINT32\r | |
94 | VmReadMem32 (\r | |
95 | IN VM_CONTEXT *VmPtr,\r | |
96 | IN UINTN Addr\r | |
97 | );\r | |
98 | \r | |
99 | STATIC\r | |
100 | UINT64\r | |
101 | VmReadMem64 (\r | |
102 | IN VM_CONTEXT *VmPtr,\r | |
103 | IN UINTN Addr\r | |
104 | );\r | |
105 | \r | |
106 | STATIC\r | |
107 | UINTN\r | |
108 | VmReadMemN (\r | |
109 | IN VM_CONTEXT *VmPtr,\r | |
110 | IN UINTN Addr\r | |
111 | );\r | |
112 | \r | |
113 | STATIC\r | |
114 | EFI_STATUS\r | |
115 | VmWriteMem8 (\r | |
116 | IN VM_CONTEXT *VmPtr,\r | |
117 | UINTN Addr,\r | |
118 | IN UINT8 Data\r | |
119 | );\r | |
120 | \r | |
121 | STATIC\r | |
122 | EFI_STATUS\r | |
123 | VmWriteMem16 (\r | |
124 | IN VM_CONTEXT *VmPtr,\r | |
125 | UINTN Addr,\r | |
126 | IN UINT16 Data\r | |
127 | );\r | |
128 | \r | |
129 | STATIC\r | |
130 | EFI_STATUS\r | |
131 | VmWriteMem32 (\r | |
132 | IN VM_CONTEXT *VmPtr,\r | |
133 | UINTN Addr,\r | |
134 | IN UINT32 Data\r | |
135 | );\r | |
136 | \r | |
137 | EFI_STATUS\r | |
138 | VmWriteMemN (\r | |
139 | IN VM_CONTEXT *VmPtr,\r | |
140 | UINTN Addr,\r | |
141 | IN UINTN Data\r | |
142 | );\r | |
143 | \r | |
144 | EFI_STATUS\r | |
145 | VmWriteMem64 (\r | |
146 | IN VM_CONTEXT *VmPtr,\r | |
147 | UINTN Addr,\r | |
148 | IN UINT64 Data\r | |
149 | );\r | |
150 | \r | |
151 | STATIC\r | |
152 | UINT16\r | |
153 | VmReadCode16 (\r | |
154 | IN VM_CONTEXT *VmPtr,\r | |
155 | IN UINT32 Offset\r | |
156 | );\r | |
157 | \r | |
158 | STATIC\r | |
159 | UINT32\r | |
160 | VmReadCode32 (\r | |
161 | IN VM_CONTEXT *VmPtr,\r | |
162 | IN UINT32 Offset\r | |
163 | );\r | |
164 | \r | |
165 | STATIC\r | |
166 | UINT64\r | |
167 | VmReadCode64 (\r | |
168 | IN VM_CONTEXT *VmPtr,\r | |
169 | IN UINT32 Offset\r | |
170 | );\r | |
171 | \r | |
172 | STATIC\r | |
173 | INT8\r | |
174 | VmReadImmed8 (\r | |
175 | IN VM_CONTEXT *VmPtr,\r | |
176 | IN UINT32 Offset\r | |
177 | );\r | |
178 | \r | |
179 | STATIC\r | |
180 | INT16\r | |
181 | VmReadImmed16 (\r | |
182 | IN VM_CONTEXT *VmPtr,\r | |
183 | IN UINT32 Offset\r | |
184 | );\r | |
185 | \r | |
186 | STATIC\r | |
187 | INT32\r | |
188 | VmReadImmed32 (\r | |
189 | IN VM_CONTEXT *VmPtr,\r | |
190 | IN UINT32 Offset\r | |
191 | );\r | |
192 | \r | |
193 | STATIC\r | |
194 | INT64\r | |
195 | VmReadImmed64 (\r | |
196 | IN VM_CONTEXT *VmPtr,\r | |
197 | IN UINT32 Offset\r | |
198 | );\r | |
199 | \r | |
200 | STATIC\r | |
201 | UINTN\r | |
202 | ConvertStackAddr (\r | |
203 | IN VM_CONTEXT *VmPtr,\r | |
204 | IN UINTN Addr\r | |
205 | );\r | |
206 | \r | |
207 | STATIC\r | |
208 | EFI_STATUS\r | |
209 | ExecuteDataManip (\r | |
210 | IN VM_CONTEXT *VmPtr,\r | |
211 | IN BOOLEAN IsSignedOperation\r | |
212 | );\r | |
213 | \r | |
214 | //\r | |
215 | // Functions that execute VM opcodes\r | |
216 | //\r | |
217 | STATIC\r | |
218 | EFI_STATUS\r | |
219 | ExecuteBREAK (\r | |
220 | IN VM_CONTEXT *VmPtr\r | |
221 | );\r | |
222 | \r | |
223 | STATIC\r | |
224 | EFI_STATUS\r | |
225 | ExecuteJMP (\r | |
226 | IN VM_CONTEXT *VmPtr\r | |
227 | );\r | |
228 | \r | |
229 | STATIC\r | |
230 | EFI_STATUS\r | |
231 | ExecuteJMP8 (\r | |
232 | IN VM_CONTEXT *VmPtr\r | |
233 | );\r | |
234 | \r | |
235 | STATIC\r | |
236 | EFI_STATUS\r | |
237 | ExecuteCALL (\r | |
238 | IN VM_CONTEXT *VmPtr\r | |
239 | );\r | |
240 | \r | |
241 | STATIC\r | |
242 | EFI_STATUS\r | |
243 | ExecuteRET (\r | |
244 | IN VM_CONTEXT *VmPtr\r | |
245 | );\r | |
246 | \r | |
247 | STATIC\r | |
248 | EFI_STATUS\r | |
249 | ExecuteCMP (\r | |
250 | IN VM_CONTEXT *VmPtr\r | |
251 | );\r | |
252 | \r | |
253 | STATIC\r | |
254 | EFI_STATUS\r | |
255 | ExecuteCMPI (\r | |
256 | IN VM_CONTEXT *VmPtr\r | |
257 | );\r | |
258 | \r | |
259 | STATIC\r | |
260 | EFI_STATUS\r | |
261 | ExecuteMOVxx (\r | |
262 | IN VM_CONTEXT *VmPtr\r | |
263 | );\r | |
264 | \r | |
265 | STATIC\r | |
266 | EFI_STATUS\r | |
267 | ExecuteMOVI (\r | |
268 | IN VM_CONTEXT *VmPtr\r | |
269 | );\r | |
270 | \r | |
271 | STATIC\r | |
272 | EFI_STATUS\r | |
273 | ExecuteMOVIn (\r | |
274 | IN VM_CONTEXT *VmPtr\r | |
275 | );\r | |
276 | \r | |
277 | STATIC\r | |
278 | EFI_STATUS\r | |
279 | ExecuteMOVREL (\r | |
280 | IN VM_CONTEXT *VmPtr\r | |
281 | );\r | |
282 | \r | |
283 | STATIC\r | |
284 | EFI_STATUS\r | |
285 | ExecutePUSHn (\r | |
286 | IN VM_CONTEXT *VmPtr\r | |
287 | );\r | |
288 | \r | |
289 | STATIC\r | |
290 | EFI_STATUS\r | |
291 | ExecutePUSH (\r | |
292 | IN VM_CONTEXT *VmPtr\r | |
293 | );\r | |
294 | \r | |
295 | STATIC\r | |
296 | EFI_STATUS\r | |
297 | ExecutePOPn (\r | |
298 | IN VM_CONTEXT *VmPtr\r | |
299 | );\r | |
300 | \r | |
301 | STATIC\r | |
302 | EFI_STATUS\r | |
303 | ExecutePOP (\r | |
304 | IN VM_CONTEXT *VmPtr\r | |
305 | );\r | |
306 | \r | |
307 | STATIC\r | |
308 | EFI_STATUS\r | |
309 | ExecuteSignedDataManip (\r | |
310 | IN VM_CONTEXT *VmPtr\r | |
311 | );\r | |
312 | \r | |
313 | STATIC\r | |
314 | EFI_STATUS\r | |
315 | ExecuteUnsignedDataManip (\r | |
316 | IN VM_CONTEXT *VmPtr\r | |
317 | );\r | |
318 | \r | |
319 | STATIC\r | |
320 | EFI_STATUS\r | |
321 | ExecuteLOADSP (\r | |
322 | IN VM_CONTEXT *VmPtr\r | |
323 | );\r | |
324 | \r | |
325 | STATIC\r | |
326 | EFI_STATUS\r | |
327 | ExecuteSTORESP (\r | |
328 | IN VM_CONTEXT *VmPtr\r | |
329 | );\r | |
330 | \r | |
331 | STATIC\r | |
332 | EFI_STATUS\r | |
333 | ExecuteMOVsnd (\r | |
334 | IN VM_CONTEXT *VmPtr\r | |
335 | );\r | |
336 | \r | |
337 | STATIC\r | |
338 | EFI_STATUS\r | |
339 | ExecuteMOVsnw (\r | |
340 | IN VM_CONTEXT *VmPtr\r | |
341 | );\r | |
342 | \r | |
343 | //\r | |
344 | // Data manipulation subfunctions\r | |
345 | //\r | |
346 | STATIC\r | |
347 | UINT64\r | |
348 | ExecuteNOT (\r | |
349 | IN VM_CONTEXT *VmPtr,\r | |
350 | IN UINT64 Op1,\r | |
351 | IN UINT64 Op2\r | |
352 | );\r | |
353 | \r | |
354 | STATIC\r | |
355 | UINT64\r | |
356 | ExecuteNEG (\r | |
357 | IN VM_CONTEXT *VmPtr,\r | |
358 | IN UINT64 Op1,\r | |
359 | IN UINT64 Op2\r | |
360 | );\r | |
361 | \r | |
362 | STATIC\r | |
363 | UINT64\r | |
364 | ExecuteADD (\r | |
365 | IN VM_CONTEXT *VmPtr,\r | |
366 | IN UINT64 Op1,\r | |
367 | IN UINT64 Op2\r | |
368 | );\r | |
369 | \r | |
370 | STATIC\r | |
371 | UINT64\r | |
372 | ExecuteSUB (\r | |
373 | IN VM_CONTEXT *VmPtr,\r | |
374 | IN UINT64 Op1,\r | |
375 | IN UINT64 Op2\r | |
376 | );\r | |
377 | \r | |
378 | STATIC\r | |
379 | UINT64\r | |
380 | ExecuteMUL (\r | |
381 | IN VM_CONTEXT *VmPtr,\r | |
382 | IN UINT64 Op1,\r | |
383 | IN UINT64 Op2\r | |
384 | );\r | |
385 | \r | |
386 | STATIC\r | |
387 | UINT64\r | |
388 | ExecuteMULU (\r | |
389 | IN VM_CONTEXT *VmPtr,\r | |
390 | IN UINT64 Op1,\r | |
391 | IN UINT64 Op2\r | |
392 | );\r | |
393 | \r | |
394 | STATIC\r | |
395 | UINT64\r | |
396 | ExecuteDIV (\r | |
397 | IN VM_CONTEXT *VmPtr,\r | |
398 | IN UINT64 Op1,\r | |
399 | IN UINT64 Op2\r | |
400 | );\r | |
401 | \r | |
402 | STATIC\r | |
403 | UINT64\r | |
404 | ExecuteDIVU (\r | |
405 | IN VM_CONTEXT *VmPtr,\r | |
406 | IN UINT64 Op1,\r | |
407 | IN UINT64 Op2\r | |
408 | );\r | |
409 | \r | |
410 | STATIC\r | |
411 | UINT64\r | |
412 | ExecuteMOD (\r | |
413 | IN VM_CONTEXT *VmPtr,\r | |
414 | IN UINT64 Op1,\r | |
415 | IN UINT64 Op2\r | |
416 | );\r | |
417 | \r | |
418 | STATIC\r | |
419 | UINT64\r | |
420 | ExecuteMODU (\r | |
421 | IN VM_CONTEXT *VmPtr,\r | |
422 | IN UINT64 Op1,\r | |
423 | IN UINT64 Op2\r | |
424 | );\r | |
425 | \r | |
426 | STATIC\r | |
427 | UINT64\r | |
428 | ExecuteAND (\r | |
429 | IN VM_CONTEXT *VmPtr,\r | |
430 | IN UINT64 Op1,\r | |
431 | IN UINT64 Op2\r | |
432 | );\r | |
433 | \r | |
434 | STATIC\r | |
435 | UINT64\r | |
436 | ExecuteOR (\r | |
437 | IN VM_CONTEXT *VmPtr,\r | |
438 | IN UINT64 Op1,\r | |
439 | IN UINT64 Op2\r | |
440 | );\r | |
441 | \r | |
442 | STATIC\r | |
443 | UINT64\r | |
444 | ExecuteXOR (\r | |
445 | IN VM_CONTEXT *VmPtr,\r | |
446 | IN UINT64 Op1,\r | |
447 | IN UINT64 Op2\r | |
448 | );\r | |
449 | \r | |
450 | STATIC\r | |
451 | UINT64\r | |
452 | ExecuteSHL (\r | |
453 | IN VM_CONTEXT *VmPtr,\r | |
454 | IN UINT64 Op1,\r | |
455 | IN UINT64 Op2\r | |
456 | );\r | |
457 | \r | |
458 | STATIC\r | |
459 | UINT64\r | |
460 | ExecuteSHR (\r | |
461 | IN VM_CONTEXT *VmPtr,\r | |
462 | IN UINT64 Op1,\r | |
463 | IN UINT64 Op2\r | |
464 | );\r | |
465 | \r | |
466 | STATIC\r | |
467 | UINT64\r | |
468 | ExecuteASHR (\r | |
469 | IN VM_CONTEXT *VmPtr,\r | |
470 | IN UINT64 Op1,\r | |
471 | IN UINT64 Op2\r | |
472 | );\r | |
473 | \r | |
474 | STATIC\r | |
475 | UINT64\r | |
476 | ExecuteEXTNDB (\r | |
477 | IN VM_CONTEXT *VmPtr,\r | |
478 | IN UINT64 Op1,\r | |
479 | IN UINT64 Op2\r | |
480 | );\r | |
481 | \r | |
482 | STATIC\r | |
483 | UINT64\r | |
484 | ExecuteEXTNDW (\r | |
485 | IN VM_CONTEXT *VmPtr,\r | |
486 | IN UINT64 Op1,\r | |
487 | IN UINT64 Op2\r | |
488 | );\r | |
489 | \r | |
490 | STATIC\r | |
491 | UINT64\r | |
492 | ExecuteEXTNDD (\r | |
493 | IN VM_CONTEXT *VmPtr,\r | |
494 | IN UINT64 Op1,\r | |
495 | IN UINT64 Op2\r | |
496 | );\r | |
497 | \r | |
498 | //\r | |
499 | // Once we retrieve the operands for the data manipulation instructions,\r | |
500 | // call these functions to perform the operation.\r | |
501 | //\r | |
502 | static CONST DATA_MANIP_EXEC_FUNCTION mDataManipDispatchTable[] = {\r | |
503 | ExecuteNOT,\r | |
504 | ExecuteNEG,\r | |
505 | ExecuteADD,\r | |
506 | ExecuteSUB,\r | |
507 | ExecuteMUL,\r | |
508 | ExecuteMULU,\r | |
509 | ExecuteDIV,\r | |
510 | ExecuteDIVU,\r | |
511 | ExecuteMOD,\r | |
512 | ExecuteMODU,\r | |
513 | ExecuteAND,\r | |
514 | ExecuteOR,\r | |
515 | ExecuteXOR,\r | |
516 | ExecuteSHL,\r | |
517 | ExecuteSHR,\r | |
518 | ExecuteASHR,\r | |
519 | ExecuteEXTNDB,\r | |
520 | ExecuteEXTNDW,\r | |
521 | ExecuteEXTNDD,\r | |
522 | };\r | |
523 | \r | |
524 | static CONST VM_TABLE_ENTRY mVmOpcodeTable[] = {\r | |
525 | { ExecuteBREAK }, // opcode 0x00\r | |
526 | { ExecuteJMP }, // opcode 0x01\r | |
527 | { ExecuteJMP8 }, // opcode 0x02\r | |
528 | { ExecuteCALL }, // opcode 0x03\r | |
529 | { ExecuteRET }, // opcode 0x04\r | |
530 | { ExecuteCMP }, // opcode 0x05 CMPeq\r | |
531 | { ExecuteCMP }, // opcode 0x06 CMPlte\r | |
532 | { ExecuteCMP }, // opcode 0x07 CMPgte\r | |
533 | { ExecuteCMP }, // opcode 0x08 CMPulte\r | |
534 | { ExecuteCMP }, // opcode 0x09 CMPugte\r | |
535 | { ExecuteUnsignedDataManip }, // opcode 0x0A NOT\r | |
536 | { ExecuteSignedDataManip }, // opcode 0x0B NEG\r | |
537 | { ExecuteSignedDataManip }, // opcode 0x0C ADD\r | |
538 | { ExecuteSignedDataManip }, // opcode 0x0D SUB\r | |
539 | { ExecuteSignedDataManip }, // opcode 0x0E MUL\r | |
540 | { ExecuteUnsignedDataManip }, // opcode 0x0F MULU\r | |
541 | { ExecuteSignedDataManip }, // opcode 0x10 DIV\r | |
542 | { ExecuteUnsignedDataManip }, // opcode 0x11 DIVU\r | |
543 | { ExecuteSignedDataManip }, // opcode 0x12 MOD\r | |
544 | { ExecuteUnsignedDataManip }, // opcode 0x13 MODU\r | |
545 | { ExecuteUnsignedDataManip }, // opcode 0x14 AND\r | |
546 | { ExecuteUnsignedDataManip }, // opcode 0x15 OR\r | |
547 | { ExecuteUnsignedDataManip }, // opcode 0x16 XOR\r | |
548 | { ExecuteUnsignedDataManip }, // opcode 0x17 SHL\r | |
549 | { ExecuteUnsignedDataManip }, // opcode 0x18 SHR\r | |
550 | { ExecuteSignedDataManip }, // opcode 0x19 ASHR\r | |
551 | { ExecuteUnsignedDataManip }, // opcode 0x1A EXTNDB\r | |
552 | { ExecuteUnsignedDataManip }, // opcode 0x1B EXTNDW\r | |
553 | { ExecuteUnsignedDataManip }, // opcode 0x1C EXTNDD\r | |
554 | { ExecuteMOVxx }, // opcode 0x1D MOVBW\r | |
555 | { ExecuteMOVxx }, // opcode 0x1E MOVWW\r | |
556 | { ExecuteMOVxx }, // opcode 0x1F MOVDW\r | |
557 | { ExecuteMOVxx }, // opcode 0x20 MOVQW\r | |
558 | { ExecuteMOVxx }, // opcode 0x21 MOVBD\r | |
559 | { ExecuteMOVxx }, // opcode 0x22 MOVWD\r | |
560 | { ExecuteMOVxx }, // opcode 0x23 MOVDD\r | |
561 | { ExecuteMOVxx }, // opcode 0x24 MOVQD\r | |
562 | { ExecuteMOVsnw }, // opcode 0x25 MOVsnw\r | |
563 | { ExecuteMOVsnd }, // opcode 0x26 MOVsnd\r | |
564 | { NULL }, // opcode 0x27\r | |
565 | { ExecuteMOVxx }, // opcode 0x28 MOVqq\r | |
566 | { ExecuteLOADSP }, // opcode 0x29 LOADSP SP1, R2\r | |
567 | { ExecuteSTORESP }, // opcode 0x2A STORESP R1, SP2\r | |
568 | { ExecutePUSH }, // opcode 0x2B PUSH {@}R1 [imm16]\r | |
569 | { ExecutePOP }, // opcode 0x2C POP {@}R1 [imm16]\r | |
570 | { ExecuteCMPI }, // opcode 0x2D CMPIEQ\r | |
571 | { ExecuteCMPI }, // opcode 0x2E CMPILTE\r | |
572 | { ExecuteCMPI }, // opcode 0x2F CMPIGTE\r | |
573 | { ExecuteCMPI }, // opcode 0x30 CMPIULTE\r | |
574 | { ExecuteCMPI }, // opcode 0x31 CMPIUGTE\r | |
575 | { ExecuteMOVxx }, // opcode 0x32 MOVN\r | |
576 | { ExecuteMOVxx }, // opcode 0x33 MOVND\r | |
577 | { NULL }, // opcode 0x34\r | |
578 | { ExecutePUSHn }, // opcode 0x35\r | |
579 | { ExecutePOPn }, // opcode 0x36\r | |
580 | { ExecuteMOVI }, // opcode 0x37 - mov immediate data\r | |
581 | { ExecuteMOVIn }, // opcode 0x38 - mov immediate natural\r | |
582 | { ExecuteMOVREL } // opcode 0x39 - move data relative to PC\r | |
583 | };\r | |
584 | \r | |
585 | //\r | |
586 | // Length of JMP instructions, depending on upper two bits of opcode.\r | |
587 | //\r | |
588 | static CONST UINT8 mJMPLen[] = { 2, 2, 6, 10 };\r | |
589 | \r | |
590 | //\r | |
591 | // Simple Debugger Protocol GUID\r | |
592 | //\r | |
593 | EFI_GUID mEbcSimpleDebuggerProtocolGuid = EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL_GUID;\r | |
594 | \r | |
595 | EFI_STATUS\r | |
596 | EbcExecuteInstructions (\r | |
597 | IN EFI_EBC_VM_TEST_PROTOCOL *This,\r | |
598 | IN VM_CONTEXT *VmPtr,\r | |
599 | IN OUT UINTN *InstructionCount\r | |
600 | )\r | |
601 | /*++\r | |
602 | \r | |
603 | Routine Description:\r | |
604 | \r | |
605 | Given a pointer to a new VM context, execute one or more instructions. This\r | |
606 | function is only used for test purposes via the EBC VM test protocol.\r | |
607 | \r | |
608 | Arguments:\r | |
609 | \r | |
610 | This - pointer to protocol interface\r | |
611 | VmPtr - pointer to a VM context\r | |
612 | InstructionCount - how many instructions to execute. 0 if don't count.\r | |
613 | \r | |
614 | Returns:\r | |
615 | \r | |
616 | EFI_UNSUPPORTED\r | |
617 | EFI_SUCCESS\r | |
618 | \r | |
619 | --*/\r | |
620 | {\r | |
621 | UINTN ExecFunc;\r | |
622 | EFI_STATUS Status;\r | |
623 | UINTN InstructionsLeft;\r | |
624 | UINTN SavedInstructionCount;\r | |
625 | \r | |
626 | Status = EFI_SUCCESS;\r | |
627 | \r | |
628 | if (*InstructionCount == 0) {\r | |
629 | InstructionsLeft = 1;\r | |
630 | } else {\r | |
631 | InstructionsLeft = *InstructionCount;\r | |
632 | }\r | |
633 | \r | |
634 | SavedInstructionCount = *InstructionCount;\r | |
635 | *InstructionCount = 0;\r | |
636 | \r | |
637 | //\r | |
638 | // Index into the opcode table using the opcode byte for this instruction.\r | |
639 | // This gives you the execute function, which we first test for null, then\r | |
640 | // call it if it's not null.\r | |
641 | //\r | |
642 | while (InstructionsLeft != 0) {\r | |
643 | ExecFunc = (UINTN) mVmOpcodeTable[(*VmPtr->Ip & 0x3F)].ExecuteFunction;\r | |
644 | if (ExecFunc == (UINTN) NULL) {\r | |
645 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
646 | return EFI_UNSUPPORTED;\r | |
647 | } else {\r | |
648 | mVmOpcodeTable[(*VmPtr->Ip & 0x3F)].ExecuteFunction (VmPtr);\r | |
649 | *InstructionCount = *InstructionCount + 1;\r | |
650 | }\r | |
651 | \r | |
652 | //\r | |
653 | // Decrement counter if applicable\r | |
654 | //\r | |
655 | if (SavedInstructionCount != 0) {\r | |
656 | InstructionsLeft--;\r | |
657 | }\r | |
658 | }\r | |
659 | \r | |
660 | return Status;\r | |
661 | }\r | |
662 | \r | |
663 | EFI_STATUS\r | |
664 | EbcExecute (\r | |
665 | IN VM_CONTEXT *VmPtr\r | |
666 | )\r | |
667 | /*++\r | |
668 | \r | |
669 | Routine Description:\r | |
670 | \r | |
671 | Execute an EBC image from an entry point or from a published protocol.\r | |
672 | \r | |
673 | Arguments:\r | |
674 | \r | |
675 | VmPtr - pointer to prepared VM context.\r | |
676 | \r | |
677 | Returns:\r | |
678 | \r | |
679 | Standard EBC status.\r | |
680 | \r | |
681 | --*/\r | |
682 | {\r | |
683 | UINTN ExecFunc;\r | |
684 | UINT8 StackCorrupted;\r | |
685 | EFI_STATUS Status;\r | |
686 | EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL *EbcSimpleDebugger;\r | |
687 | \r | |
c91eaa3d | 688 | mVmPtr = VmPtr;\r |
878ddf1f | 689 | EbcSimpleDebugger = NULL;\r |
690 | Status = EFI_SUCCESS;\r | |
691 | StackCorrupted = 0;\r | |
692 | \r | |
693 | //\r | |
694 | // Make sure the magic value has been put on the stack before we got here.\r | |
695 | //\r | |
696 | if (*VmPtr->StackMagicPtr != (UINTN) VM_STACK_KEY_VALUE) {\r | |
697 | StackCorrupted = 1;\r | |
698 | }\r | |
699 | \r | |
700 | VmPtr->FramePtr = (VOID *) ((UINT8 *) (UINTN) VmPtr->R[0] + 8);\r | |
701 | \r | |
702 | //\r | |
703 | // Try to get the debug support for EBC\r | |
704 | //\r | |
2ce31132 | 705 | DEBUG_CODE_BEGIN ();\r |
878ddf1f | 706 | Status = gBS->LocateProtocol (\r |
707 | &mEbcSimpleDebuggerProtocolGuid,\r | |
708 | NULL,\r | |
709 | (VOID **) &EbcSimpleDebugger\r | |
710 | );\r | |
711 | if (EFI_ERROR (Status)) {\r | |
712 | EbcSimpleDebugger = NULL;\r | |
713 | }\r | |
2ce31132 | 714 | DEBUG_CODE_END ();\r |
878ddf1f | 715 | \r |
716 | //\r | |
717 | // Save the start IP for debug. For example, if we take an exception we\r | |
718 | // can print out the location of the exception relative to the entry point,\r | |
719 | // which could then be used in a disassembly listing to find the problem.\r | |
720 | //\r | |
721 | VmPtr->EntryPoint = (VOID *) VmPtr->Ip;\r | |
722 | \r | |
723 | //\r | |
724 | // We'll wait for this flag to know when we're done. The RET\r | |
725 | // instruction sets it if it runs out of stack.\r | |
726 | //\r | |
727 | VmPtr->StopFlags = 0;\r | |
728 | while (!(VmPtr->StopFlags & STOPFLAG_APP_DONE)) {\r | |
729 | //\r | |
730 | // If we've found a simple debugger protocol, call it\r | |
731 | //\r | |
2ce31132 | 732 | DEBUG_CODE_BEGIN ();\r |
878ddf1f | 733 | if (EbcSimpleDebugger != NULL) {\r |
734 | EbcSimpleDebugger->Debugger (EbcSimpleDebugger, VmPtr);\r | |
735 | }\r | |
2ce31132 | 736 | DEBUG_CODE_END ();\r |
878ddf1f | 737 | \r |
738 | //\r | |
739 | // Verify the opcode is in range. Otherwise generate an exception.\r | |
740 | //\r | |
741 | if ((*VmPtr->Ip & OPCODE_M_OPCODE) >= (sizeof (mVmOpcodeTable) / sizeof (mVmOpcodeTable[0]))) {\r | |
742 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
743 | Status = EFI_UNSUPPORTED;\r | |
744 | goto Done;\r | |
745 | }\r | |
746 | //\r | |
747 | // Use the opcode bits to index into the opcode dispatch table. If the\r | |
748 | // function pointer is null then generate an exception.\r | |
749 | //\r | |
750 | ExecFunc = (UINTN) mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction;\r | |
751 | if (ExecFunc == (UINTN) NULL) {\r | |
752 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
753 | Status = EFI_UNSUPPORTED;\r | |
754 | goto Done;\r | |
755 | }\r | |
756 | //\r | |
757 | // The EBC VM is a strongly ordered processor, so perform a fence operation before\r | |
758 | // and after each instruction is executed.\r | |
759 | //\r | |
760 | MemoryFence ();\r | |
761 | \r | |
762 | mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction (VmPtr);\r | |
763 | \r | |
764 | MemoryFence ();\r | |
765 | \r | |
766 | //\r | |
767 | // If the step flag is set, signal an exception and continue. We don't\r | |
768 | // clear it here. Assuming the debugger is responsible for clearing it.\r | |
769 | //\r | |
770 | if (VMFLAG_ISSET (VmPtr, VMFLAGS_STEP)) {\r | |
771 | EbcDebugSignalException (EXCEPT_EBC_STEP, EXCEPTION_FLAG_NONE, VmPtr);\r | |
772 | }\r | |
773 | //\r | |
774 | // Make sure stack has not been corrupted. Only report it once though.\r | |
775 | //\r | |
776 | if (!StackCorrupted && (*VmPtr->StackMagicPtr != (UINTN) VM_STACK_KEY_VALUE)) {\r | |
777 | EbcDebugSignalException (EXCEPT_EBC_STACK_FAULT, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
778 | StackCorrupted = 1;\r | |
779 | }\r | |
780 | }\r | |
781 | \r | |
782 | Done:\r | |
c91eaa3d | 783 | mVmPtr = NULL;\r |
878ddf1f | 784 | return Status;\r |
785 | }\r | |
786 | \r | |
787 | STATIC\r | |
788 | EFI_STATUS\r | |
789 | ExecuteMOVxx (\r | |
790 | IN VM_CONTEXT *VmPtr\r | |
791 | )\r | |
792 | /*++\r | |
793 | \r | |
794 | Routine Description:\r | |
795 | \r | |
796 | Execute the MOVxx instructions.\r | |
797 | \r | |
798 | Arguments:\r | |
799 | \r | |
800 | VmPtr - pointer to a VM context.\r | |
801 | \r | |
802 | Returns:\r | |
803 | \r | |
804 | EFI_UNSUPPORTED\r | |
805 | EFI_SUCCESS\r | |
806 | \r | |
807 | Instruction format:\r | |
808 | \r | |
809 | MOV[b|w|d|q|n]{w|d} {@}R1 {Index16|32}, {@}R2 {Index16|32}\r | |
810 | MOVqq {@}R1 {Index64}, {@}R2 {Index64}\r | |
811 | \r | |
812 | Copies contents of [R2] -> [R1], zero extending where required.\r | |
813 | \r | |
814 | First character indicates the size of the move.\r | |
815 | Second character indicates the size of the index(s).\r | |
816 | \r | |
817 | Invalid to have R1 direct with index.\r | |
818 | \r | |
819 | --*/\r | |
820 | {\r | |
821 | UINT8 Opcode;\r | |
822 | UINT8 OpcMasked;\r | |
823 | UINT8 Operands;\r | |
824 | UINT8 Size;\r | |
825 | UINT8 MoveSize;\r | |
826 | INT16 Index16;\r | |
827 | INT32 Index32;\r | |
828 | INT64 Index64Op1;\r | |
829 | INT64 Index64Op2;\r | |
830 | UINT64 Data64;\r | |
831 | UINT64 DataMask;\r | |
832 | UINTN Source;\r | |
833 | \r | |
834 | Opcode = GETOPCODE (VmPtr);\r | |
835 | OpcMasked = (UINT8) (Opcode & OPCODE_M_OPCODE);\r | |
836 | \r | |
837 | //\r | |
838 | // Get the operands byte so we can get R1 and R2\r | |
839 | //\r | |
840 | Operands = GETOPERANDS (VmPtr);\r | |
841 | \r | |
842 | //\r | |
843 | // Assume no indexes\r | |
844 | //\r | |
845 | Index64Op1 = 0;\r | |
846 | Index64Op2 = 0;\r | |
847 | Data64 = 0;\r | |
848 | \r | |
849 | //\r | |
850 | // Determine if we have an index/immediate data. Base instruction size\r | |
851 | // is 2 (opcode + operands). Add to this size each index specified.\r | |
852 | //\r | |
853 | Size = 2;\r | |
854 | if (Opcode & (OPCODE_M_IMMED_OP1 | OPCODE_M_IMMED_OP2)) {\r | |
855 | //\r | |
856 | // Determine size of the index from the opcode. Then get it.\r | |
857 | //\r | |
858 | if ((OpcMasked <= OPCODE_MOVQW) || (OpcMasked == OPCODE_MOVNW)) {\r | |
859 | //\r | |
860 | // MOVBW, MOVWW, MOVDW, MOVQW, and MOVNW have 16-bit immediate index.\r | |
861 | // Get one or both index values.\r | |
862 | //\r | |
863 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
864 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
865 | Index64Op1 = (INT64) Index16;\r | |
866 | Size += sizeof (UINT16);\r | |
867 | }\r | |
868 | \r | |
869 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
870 | Index16 = VmReadIndex16 (VmPtr, Size);\r | |
871 | Index64Op2 = (INT64) Index16;\r | |
872 | Size += sizeof (UINT16);\r | |
873 | }\r | |
874 | } else if ((OpcMasked <= OPCODE_MOVQD) || (OpcMasked == OPCODE_MOVND)) {\r | |
875 | //\r | |
876 | // MOVBD, MOVWD, MOVDD, MOVQD, and MOVND have 32-bit immediate index\r | |
877 | //\r | |
878 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
879 | Index32 = VmReadIndex32 (VmPtr, 2);\r | |
880 | Index64Op1 = (INT64) Index32;\r | |
881 | Size += sizeof (UINT32);\r | |
882 | }\r | |
883 | \r | |
884 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
885 | Index32 = VmReadIndex32 (VmPtr, Size);\r | |
886 | Index64Op2 = (INT64) Index32;\r | |
887 | Size += sizeof (UINT32);\r | |
888 | }\r | |
889 | } else if (OpcMasked == OPCODE_MOVQQ) {\r | |
890 | //\r | |
891 | // MOVqq -- only form with a 64-bit index\r | |
892 | //\r | |
893 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
894 | Index64Op1 = VmReadIndex64 (VmPtr, 2);\r | |
895 | Size += sizeof (UINT64);\r | |
896 | }\r | |
897 | \r | |
898 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
899 | Index64Op2 = VmReadIndex64 (VmPtr, Size);\r | |
900 | Size += sizeof (UINT64);\r | |
901 | }\r | |
902 | } else {\r | |
903 | //\r | |
904 | // Obsolete MOVBQ, MOVWQ, MOVDQ, and MOVNQ have 64-bit immediate index\r | |
905 | //\r | |
906 | EbcDebugSignalException (\r | |
907 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
908 | EXCEPTION_FLAG_FATAL,\r | |
909 | VmPtr\r | |
910 | );\r | |
911 | return EFI_UNSUPPORTED;\r | |
912 | }\r | |
913 | }\r | |
914 | //\r | |
915 | // Determine the size of the move, and create a mask for it so we can\r | |
916 | // clear unused bits.\r | |
917 | //\r | |
918 | if ((OpcMasked == OPCODE_MOVBW) || (OpcMasked == OPCODE_MOVBD)) {\r | |
919 | MoveSize = DATA_SIZE_8;\r | |
920 | DataMask = 0xFF;\r | |
921 | } else if ((OpcMasked == OPCODE_MOVWW) || (OpcMasked == OPCODE_MOVWD)) {\r | |
922 | MoveSize = DATA_SIZE_16;\r | |
923 | DataMask = 0xFFFF;\r | |
924 | } else if ((OpcMasked == OPCODE_MOVDW) || (OpcMasked == OPCODE_MOVDD)) {\r | |
925 | MoveSize = DATA_SIZE_32;\r | |
926 | DataMask = 0xFFFFFFFF;\r | |
927 | } else if ((OpcMasked == OPCODE_MOVQW) || (OpcMasked == OPCODE_MOVQD) || (OpcMasked == OPCODE_MOVQQ)) {\r | |
928 | MoveSize = DATA_SIZE_64;\r | |
929 | DataMask = (UINT64)~0;\r | |
930 | } else if ((OpcMasked == OPCODE_MOVNW) || (OpcMasked == OPCODE_MOVND)) {\r | |
931 | MoveSize = DATA_SIZE_N;\r | |
932 | DataMask = (UINT64)~0 >> (64 - 8 * sizeof (UINTN));\r | |
933 | } else {\r | |
934 | //\r | |
935 | // We were dispatched to this function and we don't recognize the opcode\r | |
936 | //\r | |
937 | EbcDebugSignalException (EXCEPT_EBC_UNDEFINED, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
938 | return EFI_UNSUPPORTED;\r | |
939 | }\r | |
940 | //\r | |
941 | // Now get the source address\r | |
942 | //\r | |
943 | if (OPERAND2_INDIRECT (Operands)) {\r | |
944 | //\r | |
945 | // Indirect form @R2. Compute address of operand2\r | |
946 | //\r | |
947 | Source = (UINTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Index64Op2);\r | |
948 | //\r | |
949 | // Now get the data from the source. Always 0-extend and let the compiler\r | |
950 | // sign-extend where required.\r | |
951 | //\r | |
952 | switch (MoveSize) {\r | |
953 | case DATA_SIZE_8:\r | |
954 | Data64 = (UINT64) (UINT8) VmReadMem8 (VmPtr, Source);\r | |
955 | break;\r | |
956 | \r | |
957 | case DATA_SIZE_16:\r | |
958 | Data64 = (UINT64) (UINT16) VmReadMem16 (VmPtr, Source);\r | |
959 | break;\r | |
960 | \r | |
961 | case DATA_SIZE_32:\r | |
962 | Data64 = (UINT64) (UINT32) VmReadMem32 (VmPtr, Source);\r | |
963 | break;\r | |
964 | \r | |
965 | case DATA_SIZE_64:\r | |
966 | Data64 = (UINT64) VmReadMem64 (VmPtr, Source);\r | |
967 | break;\r | |
968 | \r | |
969 | case DATA_SIZE_N:\r | |
970 | Data64 = (UINT64) (UINTN) VmReadMemN (VmPtr, Source);\r | |
971 | break;\r | |
972 | \r | |
973 | default:\r | |
974 | //\r | |
975 | // not reached\r | |
976 | //\r | |
977 | break;\r | |
978 | }\r | |
979 | } else {\r | |
980 | //\r | |
981 | // Not indirect source: MOVxx {@}Rx, Ry [Index]\r | |
982 | //\r | |
983 | Data64 = VmPtr->R[OPERAND2_REGNUM (Operands)] + Index64Op2;\r | |
984 | //\r | |
985 | // Did Operand2 have an index? If so, treat as two signed values since\r | |
986 | // indexes are signed values.\r | |
987 | //\r | |
988 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
989 | //\r | |
990 | // NOTE: need to find a way to fix this, most likely by changing the VM\r | |
991 | // implementation to remove the stack gap. To do that, we'd need to\r | |
992 | // allocate stack space for the VM and actually set the system\r | |
993 | // stack pointer to the allocated buffer when the VM starts.\r | |
994 | //\r | |
995 | // Special case -- if someone took the address of a function parameter\r | |
996 | // then we need to make sure it's not in the stack gap. We can identify\r | |
997 | // this situation if (Operand2 register == 0) && (Operand2 is direct)\r | |
998 | // && (Index applies to Operand2) && (Index > 0) && (Operand1 register != 0)\r | |
999 | // Situations that to be aware of:\r | |
1000 | // * stack adjustments at beginning and end of functions R0 = R0 += stacksize\r | |
1001 | //\r | |
1002 | if ((OPERAND2_REGNUM (Operands) == 0) &&\r | |
1003 | (!OPERAND2_INDIRECT (Operands)) &&\r | |
1004 | (Index64Op2 > 0) &&\r | |
1005 | (OPERAND1_REGNUM (Operands) == 0) &&\r | |
1006 | (OPERAND1_INDIRECT (Operands))\r | |
1007 | ) {\r | |
1008 | Data64 = (UINT64) ConvertStackAddr (VmPtr, (UINTN) (INT64) Data64);\r | |
1009 | }\r | |
1010 | }\r | |
1011 | }\r | |
1012 | //\r | |
1013 | // Now write it back\r | |
1014 | //\r | |
1015 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1016 | //\r | |
1017 | // Reuse the Source variable to now be dest.\r | |
1018 | //\r | |
1019 | Source = (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index64Op1);\r | |
1020 | //\r | |
1021 | // Do the write based on the size\r | |
1022 | //\r | |
1023 | switch (MoveSize) {\r | |
1024 | case DATA_SIZE_8:\r | |
1025 | VmWriteMem8 (VmPtr, Source, (UINT8) Data64);\r | |
1026 | break;\r | |
1027 | \r | |
1028 | case DATA_SIZE_16:\r | |
1029 | VmWriteMem16 (VmPtr, Source, (UINT16) Data64);\r | |
1030 | break;\r | |
1031 | \r | |
1032 | case DATA_SIZE_32:\r | |
1033 | VmWriteMem32 (VmPtr, Source, (UINT32) Data64);\r | |
1034 | break;\r | |
1035 | \r | |
1036 | case DATA_SIZE_64:\r | |
1037 | VmWriteMem64 (VmPtr, Source, Data64);\r | |
1038 | break;\r | |
1039 | \r | |
1040 | case DATA_SIZE_N:\r | |
1041 | VmWriteMemN (VmPtr, Source, (UINTN) Data64);\r | |
1042 | break;\r | |
1043 | \r | |
1044 | default:\r | |
1045 | //\r | |
1046 | // not reached\r | |
1047 | //\r | |
1048 | break;\r | |
1049 | }\r | |
1050 | } else {\r | |
1051 | //\r | |
1052 | // Operand1 direct.\r | |
1053 | // Make sure we didn't have an index on operand1.\r | |
1054 | //\r | |
1055 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
1056 | EbcDebugSignalException (\r | |
1057 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1058 | EXCEPTION_FLAG_FATAL,\r | |
1059 | VmPtr\r | |
1060 | );\r | |
1061 | return EFI_UNSUPPORTED;\r | |
1062 | }\r | |
1063 | //\r | |
1064 | // Direct storage in register. Clear unused bits and store back to\r | |
1065 | // register.\r | |
1066 | //\r | |
1067 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Data64 & DataMask;\r | |
1068 | }\r | |
1069 | //\r | |
1070 | // Advance the instruction pointer\r | |
1071 | //\r | |
1072 | VmPtr->Ip += Size;\r | |
1073 | return EFI_SUCCESS;\r | |
1074 | }\r | |
1075 | \r | |
1076 | STATIC\r | |
1077 | EFI_STATUS\r | |
1078 | ExecuteBREAK (\r | |
1079 | IN VM_CONTEXT *VmPtr\r | |
1080 | )\r | |
1081 | /*++\r | |
1082 | \r | |
1083 | Routine Description:\r | |
1084 | \r | |
1085 | Execute the EBC BREAK instruction\r | |
1086 | \r | |
1087 | Arguments:\r | |
1088 | \r | |
1089 | VmPtr - pointer to current VM context\r | |
1090 | \r | |
1091 | Returns:\r | |
1092 | \r | |
1093 | EFI_UNSUPPORTED\r | |
1094 | EFI_SUCCESS\r | |
1095 | \r | |
1096 | --*/\r | |
1097 | {\r | |
1098 | UINT8 Operands;\r | |
1099 | VOID *EbcEntryPoint;\r | |
1100 | VOID *Thunk;\r | |
1101 | EFI_STATUS Status;\r | |
1102 | UINT64 U64EbcEntryPoint;\r | |
1103 | INT32 Offset;\r | |
1104 | \r | |
1105 | Operands = GETOPERANDS (VmPtr);\r | |
1106 | switch (Operands) {\r | |
1107 | //\r | |
1108 | // Runaway program break. Generate an exception and terminate\r | |
1109 | //\r | |
1110 | case 0:\r | |
1111 | EbcDebugSignalException (EXCEPT_EBC_BAD_BREAK, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1112 | break;\r | |
1113 | \r | |
1114 | //\r | |
1115 | // Get VM version -- return VM revision number in R7\r | |
1116 | //\r | |
1117 | case 1:\r | |
1118 | //\r | |
1119 | // Bits:\r | |
1120 | // 63-17 = 0\r | |
1121 | // 16-8 = Major version\r | |
1122 | // 7-0 = Minor version\r | |
1123 | //\r | |
1124 | VmPtr->R[7] = GetVmVersion ();\r | |
1125 | break;\r | |
1126 | \r | |
1127 | //\r | |
1128 | // Debugger breakpoint\r | |
1129 | //\r | |
1130 | case 3:\r | |
1131 | VmPtr->StopFlags |= STOPFLAG_BREAKPOINT;\r | |
1132 | //\r | |
1133 | // See if someone has registered a handler\r | |
1134 | //\r | |
1135 | EbcDebugSignalException (\r | |
1136 | EXCEPT_EBC_BREAKPOINT,\r | |
1137 | EXCEPTION_FLAG_NONE,\r | |
1138 | VmPtr\r | |
1139 | );\r | |
1140 | //\r | |
1141 | // Don't advance the IP\r | |
1142 | //\r | |
1143 | return EFI_UNSUPPORTED;\r | |
1144 | break;\r | |
1145 | \r | |
1146 | //\r | |
1147 | // System call, which there are none, so NOP it.\r | |
1148 | //\r | |
1149 | case 4:\r | |
1150 | break;\r | |
1151 | \r | |
1152 | //\r | |
1153 | // Create a thunk for EBC code. R7 points to a 32-bit (in a 64-bit slot)\r | |
1154 | // "offset from self" pointer to the EBC entry point.\r | |
1155 | // After we're done, *(UINT64 *)R7 will be the address of the new thunk.\r | |
1156 | //\r | |
1157 | case 5:\r | |
1158 | Offset = (INT32) VmReadMem32 (VmPtr, (UINTN) VmPtr->R[7]);\r | |
1159 | U64EbcEntryPoint = (UINT64) (VmPtr->R[7] + Offset + 4);\r | |
1160 | EbcEntryPoint = (VOID *) (UINTN) U64EbcEntryPoint;\r | |
1161 | \r | |
1162 | //\r | |
1163 | // Now create a new thunk\r | |
1164 | //\r | |
1165 | Status = EbcCreateThunks (VmPtr->ImageHandle, EbcEntryPoint, &Thunk, 0);\r | |
1166 | \r | |
1167 | //\r | |
1168 | // Finally replace the EBC entry point memory with the thunk address\r | |
1169 | //\r | |
1170 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[7], (UINT64) (UINTN) Thunk);\r | |
1171 | break;\r | |
1172 | \r | |
1173 | //\r | |
1174 | // Compiler setting version per value in R7\r | |
1175 | //\r | |
1176 | case 6:\r | |
1177 | VmPtr->CompilerVersion = (UINT32) VmPtr->R[7];\r | |
1178 | //\r | |
1179 | // Check compiler version against VM version?\r | |
1180 | //\r | |
1181 | break;\r | |
1182 | \r | |
1183 | //\r | |
1184 | // Unhandled break code. Signal exception.\r | |
1185 | //\r | |
1186 | default:\r | |
1187 | EbcDebugSignalException (EXCEPT_EBC_BAD_BREAK, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1188 | break;\r | |
1189 | }\r | |
1190 | //\r | |
1191 | // Advance IP\r | |
1192 | //\r | |
1193 | VmPtr->Ip += 2;\r | |
1194 | return EFI_SUCCESS;\r | |
1195 | }\r | |
1196 | \r | |
1197 | STATIC\r | |
1198 | EFI_STATUS\r | |
1199 | ExecuteJMP (\r | |
1200 | IN VM_CONTEXT *VmPtr\r | |
1201 | )\r | |
1202 | /*++\r | |
1203 | \r | |
1204 | Routine Description:\r | |
1205 | Execute the JMP instruction\r | |
1206 | \r | |
1207 | Arguments:\r | |
1208 | VmPtr - pointer to VM context\r | |
1209 | \r | |
1210 | Returns:\r | |
1211 | Standard EFI_STATUS\r | |
1212 | \r | |
1213 | Instruction syntax:\r | |
1214 | JMP64{cs|cc} Immed64\r | |
1215 | JMP32{cs|cc} {@}R1 {Immed32|Index32}\r | |
1216 | \r | |
1217 | Encoding:\r | |
1218 | b0.7 - immediate data present\r | |
1219 | b0.6 - 1 = 64 bit immediate data\r | |
1220 | 0 = 32 bit immediate data\r | |
1221 | b1.7 - 1 = conditional\r | |
1222 | b1.6 1 = CS (condition set)\r | |
1223 | 0 = CC (condition clear)\r | |
1224 | b1.4 1 = relative address\r | |
1225 | 0 = absolute address\r | |
1226 | b1.3 1 = operand1 indirect\r | |
1227 | b1.2-0 operand 1\r | |
1228 | \r | |
1229 | --*/\r | |
1230 | {\r | |
1231 | UINT8 Opcode;\r | |
1232 | UINT8 CompareSet;\r | |
1233 | UINT8 ConditionFlag;\r | |
1234 | UINT8 Size;\r | |
1235 | UINT8 Operand;\r | |
1236 | UINT64 Data64;\r | |
1237 | INT32 Index32;\r | |
1238 | UINTN Addr;\r | |
1239 | \r | |
1240 | Operand = GETOPERANDS (VmPtr);\r | |
1241 | Opcode = GETOPCODE (VmPtr);\r | |
1242 | \r | |
1243 | //\r | |
1244 | // Get instruction length from the opcode. The upper two bits are used here\r | |
1245 | // to index into the length array.\r | |
1246 | //\r | |
1247 | Size = mJMPLen[(Opcode >> 6) & 0x03];\r | |
1248 | \r | |
1249 | //\r | |
1250 | // Decode instruction conditions\r | |
1251 | // If we haven't met the condition, then simply advance the IP and return.\r | |
1252 | //\r | |
1253 | CompareSet = (UINT8) ((Operand & JMP_M_CS) ? 1 : 0);\r | |
1254 | ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);\r | |
1255 | if (Operand & CONDITION_M_CONDITIONAL) {\r | |
1256 | if (CompareSet != ConditionFlag) {\r | |
1257 | VmPtr->Ip += Size;\r | |
1258 | return EFI_SUCCESS;\r | |
1259 | }\r | |
1260 | }\r | |
1261 | //\r | |
1262 | // Check for 64-bit form and do it right away since it's the most\r | |
1263 | // straight-forward form.\r | |
1264 | //\r | |
1265 | if (Opcode & OPCODE_M_IMMDATA64) {\r | |
1266 | //\r | |
1267 | // Double check for immediate-data, which is required. If not there,\r | |
1268 | // then signal an exception\r | |
1269 | //\r | |
1270 | if (!(Opcode & OPCODE_M_IMMDATA)) {\r | |
1271 | EbcDebugSignalException (\r | |
1272 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1273 | EXCEPTION_FLAG_ERROR,\r | |
1274 | VmPtr\r | |
1275 | );\r | |
1276 | return EFI_UNSUPPORTED;\r | |
1277 | }\r | |
1278 | //\r | |
1279 | // 64-bit immediate data is full address. Read the immediate data,\r | |
1280 | // check for alignment, and jump absolute.\r | |
1281 | //\r | |
1282 | Data64 = VmReadImmed64 (VmPtr, 2);\r | |
1283 | if (!IS_ALIGNED ((UINTN) Data64, sizeof (UINT16))) {\r | |
1284 | EbcDebugSignalException (\r | |
1285 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
1286 | EXCEPTION_FLAG_FATAL,\r | |
1287 | VmPtr\r | |
1288 | );\r | |
1289 | \r | |
1290 | return EFI_UNSUPPORTED;\r | |
1291 | }\r | |
1292 | \r | |
1293 | //\r | |
1294 | // Take jump -- relative or absolute\r | |
1295 | //\r | |
1296 | if (Operand & JMP_M_RELATIVE) {\r | |
1297 | VmPtr->Ip += (UINTN) Data64 + Size;\r | |
1298 | } else {\r | |
1299 | VmPtr->Ip = (VMIP) (UINTN) Data64;\r | |
1300 | }\r | |
1301 | \r | |
1302 | return EFI_SUCCESS;\r | |
1303 | }\r | |
1304 | //\r | |
1305 | // 32-bit forms:\r | |
1306 | // Get the index if there is one. May be either an index, or an immediate\r | |
1307 | // offset depending on indirect operand.\r | |
1308 | // JMP32 @R1 Index32 -- immediate data is an index\r | |
1309 | // JMP32 R1 Immed32 -- immedate data is an offset\r | |
1310 | //\r | |
1311 | if (Opcode & OPCODE_M_IMMDATA) {\r | |
1312 | if (OPERAND1_INDIRECT (Operand)) {\r | |
1313 | Index32 = VmReadIndex32 (VmPtr, 2);\r | |
1314 | } else {\r | |
1315 | Index32 = VmReadImmed32 (VmPtr, 2);\r | |
1316 | }\r | |
1317 | } else {\r | |
1318 | Index32 = 0;\r | |
1319 | }\r | |
1320 | //\r | |
1321 | // Get the register data. If R == 0, then special case where it's ignored.\r | |
1322 | //\r | |
1323 | if (OPERAND1_REGNUM (Operand) == 0) {\r | |
1324 | Data64 = 0;\r | |
1325 | } else {\r | |
1326 | Data64 = OPERAND1_REGDATA (VmPtr, Operand);\r | |
1327 | }\r | |
1328 | //\r | |
1329 | // Decode the forms\r | |
1330 | //\r | |
1331 | if (OPERAND1_INDIRECT (Operand)) {\r | |
1332 | //\r | |
1333 | // Form: JMP32 @Rx {Index32}\r | |
1334 | //\r | |
1335 | Addr = VmReadMemN (VmPtr, (UINTN) Data64 + Index32);\r | |
1336 | if (!IS_ALIGNED ((UINTN) Addr, sizeof (UINT16))) {\r | |
1337 | EbcDebugSignalException (\r | |
1338 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
1339 | EXCEPTION_FLAG_FATAL,\r | |
1340 | VmPtr\r | |
1341 | );\r | |
1342 | \r | |
1343 | return EFI_UNSUPPORTED;\r | |
1344 | }\r | |
1345 | \r | |
1346 | if (Operand & JMP_M_RELATIVE) {\r | |
1347 | VmPtr->Ip += (UINTN) Addr + Size;\r | |
1348 | } else {\r | |
1349 | VmPtr->Ip = (VMIP) Addr;\r | |
1350 | }\r | |
1351 | } else {\r | |
1352 | //\r | |
1353 | // Form: JMP32 Rx {Immed32}\r | |
1354 | //\r | |
1355 | Addr = (UINTN) (Data64 + Index32);\r | |
1356 | if (!IS_ALIGNED ((UINTN) Addr, sizeof (UINT16))) {\r | |
1357 | EbcDebugSignalException (\r | |
1358 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
1359 | EXCEPTION_FLAG_FATAL,\r | |
1360 | VmPtr\r | |
1361 | );\r | |
1362 | \r | |
1363 | return EFI_UNSUPPORTED;\r | |
1364 | }\r | |
1365 | \r | |
1366 | if (Operand & JMP_M_RELATIVE) {\r | |
1367 | VmPtr->Ip += (UINTN) Addr + Size;\r | |
1368 | } else {\r | |
1369 | VmPtr->Ip = (VMIP) Addr;\r | |
1370 | }\r | |
1371 | }\r | |
1372 | \r | |
1373 | return EFI_SUCCESS;\r | |
1374 | }\r | |
1375 | \r | |
1376 | STATIC\r | |
1377 | EFI_STATUS\r | |
1378 | ExecuteJMP8 (\r | |
1379 | IN VM_CONTEXT *VmPtr\r | |
1380 | )\r | |
1381 | /*++\r | |
1382 | \r | |
1383 | Routine Description:\r | |
1384 | Execute the EBC JMP8 instruction\r | |
1385 | \r | |
1386 | Arguments:\r | |
1387 | VmPtr - pointer to a VM context \r | |
1388 | \r | |
1389 | Returns:\r | |
1390 | Standard EFI_STATUS\r | |
1391 | \r | |
1392 | Instruction syntax:\r | |
1393 | JMP8{cs|cc} Offset/2\r | |
1394 | \r | |
1395 | --*/\r | |
1396 | {\r | |
1397 | UINT8 Opcode;\r | |
1398 | UINT8 ConditionFlag;\r | |
1399 | UINT8 CompareSet;\r | |
1400 | INT8 Offset;\r | |
1401 | \r | |
1402 | //\r | |
1403 | // Decode instruction.\r | |
1404 | //\r | |
1405 | Opcode = GETOPCODE (VmPtr);\r | |
1406 | CompareSet = (UINT8) ((Opcode & JMP_M_CS) ? 1 : 0);\r | |
1407 | ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);\r | |
1408 | \r | |
1409 | //\r | |
1410 | // If we haven't met the condition, then simply advance the IP and return\r | |
1411 | //\r | |
1412 | if (Opcode & CONDITION_M_CONDITIONAL) {\r | |
1413 | if (CompareSet != ConditionFlag) {\r | |
1414 | VmPtr->Ip += 2;\r | |
1415 | return EFI_SUCCESS;\r | |
1416 | }\r | |
1417 | }\r | |
1418 | //\r | |
1419 | // Get the offset from the instruction stream. It's relative to the\r | |
1420 | // following instruction, and divided by 2.\r | |
1421 | //\r | |
1422 | Offset = VmReadImmed8 (VmPtr, 1);\r | |
1423 | //\r | |
1424 | // Want to check for offset == -2 and then raise an exception?\r | |
1425 | //\r | |
1426 | VmPtr->Ip += (Offset * 2) + 2;\r | |
1427 | return EFI_SUCCESS;\r | |
1428 | }\r | |
1429 | \r | |
1430 | STATIC\r | |
1431 | EFI_STATUS\r | |
1432 | ExecuteMOVI (\r | |
1433 | IN VM_CONTEXT *VmPtr\r | |
1434 | )\r | |
1435 | /*++\r | |
1436 | \r | |
1437 | Routine Description:\r | |
1438 | \r | |
1439 | Execute the EBC MOVI \r | |
1440 | \r | |
1441 | Arguments:\r | |
1442 | \r | |
1443 | VmPtr - pointer to a VM context \r | |
1444 | \r | |
1445 | Returns:\r | |
1446 | \r | |
1447 | Standard EFI_STATUS\r | |
1448 | \r | |
1449 | Instruction syntax:\r | |
1450 | \r | |
1451 | MOVI[b|w|d|q][w|d|q] {@}R1 {Index16}, ImmData16|32|64\r | |
1452 | \r | |
1453 | First variable character specifies the move size\r | |
1454 | Second variable character specifies size of the immediate data\r | |
1455 | \r | |
1456 | Sign-extend the immediate data to the size of the operation, and zero-extend\r | |
1457 | if storing to a register.\r | |
1458 | \r | |
1459 | Operand1 direct with index/immed is invalid.\r | |
1460 | \r | |
1461 | --*/\r | |
1462 | {\r | |
1463 | UINT8 Opcode;\r | |
1464 | UINT8 Operands;\r | |
1465 | UINT8 Size;\r | |
1466 | INT16 Index16;\r | |
1467 | INT64 ImmData64;\r | |
1468 | UINT64 Op1;\r | |
1469 | UINT64 Mask64;\r | |
1470 | \r | |
1471 | //\r | |
1472 | // Get the opcode and operands byte so we can get R1 and R2\r | |
1473 | //\r | |
1474 | Opcode = GETOPCODE (VmPtr);\r | |
1475 | Operands = GETOPERANDS (VmPtr);\r | |
1476 | \r | |
1477 | //\r | |
1478 | // Get the index (16-bit) if present\r | |
1479 | //\r | |
1480 | if (Operands & MOVI_M_IMMDATA) {\r | |
1481 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1482 | Size = 4;\r | |
1483 | } else {\r | |
1484 | Index16 = 0;\r | |
1485 | Size = 2;\r | |
1486 | }\r | |
1487 | //\r | |
1488 | // Extract the immediate data. Sign-extend always.\r | |
1489 | //\r | |
1490 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
1491 | ImmData64 = (INT64) (INT16) VmReadImmed16 (VmPtr, Size);\r | |
1492 | Size += 2;\r | |
1493 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
1494 | ImmData64 = (INT64) (INT32) VmReadImmed32 (VmPtr, Size);\r | |
1495 | Size += 4;\r | |
1496 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
1497 | ImmData64 = (INT64) VmReadImmed64 (VmPtr, Size);\r | |
1498 | Size += 8;\r | |
1499 | } else {\r | |
1500 | //\r | |
1501 | // Invalid encoding\r | |
1502 | //\r | |
1503 | EbcDebugSignalException (\r | |
1504 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1505 | EXCEPTION_FLAG_FATAL,\r | |
1506 | VmPtr\r | |
1507 | );\r | |
1508 | return EFI_UNSUPPORTED;\r | |
1509 | }\r | |
1510 | //\r | |
1511 | // Now write back the result\r | |
1512 | //\r | |
1513 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1514 | //\r | |
1515 | // Operand1 direct. Make sure it didn't have an index.\r | |
1516 | //\r | |
1517 | if (Operands & MOVI_M_IMMDATA) {\r | |
1518 | EbcDebugSignalException (\r | |
1519 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1520 | EXCEPTION_FLAG_FATAL,\r | |
1521 | VmPtr\r | |
1522 | );\r | |
1523 | return EFI_UNSUPPORTED;\r | |
1524 | }\r | |
1525 | //\r | |
1526 | // Writing directly to a register. Clear unused bits.\r | |
1527 | //\r | |
1528 | if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH8) {\r | |
1529 | Mask64 = 0x000000FF;\r | |
1530 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH16) {\r | |
1531 | Mask64 = 0x0000FFFF;\r | |
1532 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH32) {\r | |
1533 | Mask64 = 0x00000000FFFFFFFF;\r | |
1534 | } else {\r | |
1535 | Mask64 = (UINT64)~0;\r | |
1536 | }\r | |
1537 | \r | |
1538 | VmPtr->R[OPERAND1_REGNUM (Operands)] = ImmData64 & Mask64;\r | |
1539 | } else {\r | |
1540 | //\r | |
1541 | // Get the address then write back based on size of the move\r | |
1542 | //\r | |
1543 | Op1 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
1544 | if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH8) {\r | |
1545 | VmWriteMem8 (VmPtr, (UINTN) Op1, (UINT8) ImmData64);\r | |
1546 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH16) {\r | |
1547 | VmWriteMem16 (VmPtr, (UINTN) Op1, (UINT16) ImmData64);\r | |
1548 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH32) {\r | |
1549 | VmWriteMem32 (VmPtr, (UINTN) Op1, (UINT32) ImmData64);\r | |
1550 | } else {\r | |
1551 | VmWriteMem64 (VmPtr, (UINTN) Op1, ImmData64);\r | |
1552 | }\r | |
1553 | }\r | |
1554 | //\r | |
1555 | // Advance the instruction pointer\r | |
1556 | //\r | |
1557 | VmPtr->Ip += Size;\r | |
1558 | return EFI_SUCCESS;\r | |
1559 | }\r | |
1560 | \r | |
1561 | STATIC\r | |
1562 | EFI_STATUS\r | |
1563 | ExecuteMOVIn (\r | |
1564 | IN VM_CONTEXT *VmPtr\r | |
1565 | )\r | |
1566 | /*++\r | |
1567 | \r | |
1568 | Routine Description:\r | |
1569 | \r | |
1570 | Execute the EBC MOV immediate natural. This instruction moves an immediate\r | |
1571 | index value into a register or memory location.\r | |
1572 | \r | |
1573 | Arguments:\r | |
1574 | \r | |
1575 | VmPtr - pointer to a VM context \r | |
1576 | \r | |
1577 | Returns:\r | |
1578 | \r | |
1579 | Standard EFI_STATUS\r | |
1580 | \r | |
1581 | Instruction syntax:\r | |
1582 | \r | |
1583 | MOVIn[w|d|q] {@}R1 {Index16}, Index16|32|64\r | |
1584 | \r | |
1585 | --*/\r | |
1586 | {\r | |
1587 | UINT8 Opcode;\r | |
1588 | UINT8 Operands;\r | |
1589 | UINT8 Size;\r | |
1590 | INT16 Index16;\r | |
1591 | INT16 ImmedIndex16;\r | |
1592 | INT32 ImmedIndex32;\r | |
1593 | INT64 ImmedIndex64;\r | |
1594 | UINT64 Op1;\r | |
1595 | \r | |
1596 | //\r | |
1597 | // Get the opcode and operands byte so we can get R1 and R2\r | |
1598 | //\r | |
1599 | Opcode = GETOPCODE (VmPtr);\r | |
1600 | Operands = GETOPERANDS (VmPtr);\r | |
1601 | \r | |
1602 | //\r | |
1603 | // Get the operand1 index (16-bit) if present\r | |
1604 | //\r | |
1605 | if (Operands & MOVI_M_IMMDATA) {\r | |
1606 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1607 | Size = 4;\r | |
1608 | } else {\r | |
1609 | Index16 = 0;\r | |
1610 | Size = 2;\r | |
1611 | }\r | |
1612 | //\r | |
1613 | // Extract the immediate data and convert to a 64-bit index.\r | |
1614 | //\r | |
1615 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
1616 | ImmedIndex16 = VmReadIndex16 (VmPtr, Size);\r | |
1617 | ImmedIndex64 = (INT64) ImmedIndex16;\r | |
1618 | Size += 2;\r | |
1619 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
1620 | ImmedIndex32 = VmReadIndex32 (VmPtr, Size);\r | |
1621 | ImmedIndex64 = (INT64) ImmedIndex32;\r | |
1622 | Size += 4;\r | |
1623 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
1624 | ImmedIndex64 = VmReadIndex64 (VmPtr, Size);\r | |
1625 | Size += 8;\r | |
1626 | } else {\r | |
1627 | //\r | |
1628 | // Invalid encoding\r | |
1629 | //\r | |
1630 | EbcDebugSignalException (\r | |
1631 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1632 | EXCEPTION_FLAG_FATAL,\r | |
1633 | VmPtr\r | |
1634 | );\r | |
1635 | return EFI_UNSUPPORTED;\r | |
1636 | }\r | |
1637 | //\r | |
1638 | // Now write back the result\r | |
1639 | //\r | |
1640 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1641 | //\r | |
1642 | // Check for MOVIn R1 Index16, Immed (not indirect, with index), which\r | |
1643 | // is illegal\r | |
1644 | //\r | |
1645 | if (Operands & MOVI_M_IMMDATA) {\r | |
1646 | EbcDebugSignalException (\r | |
1647 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1648 | EXCEPTION_FLAG_FATAL,\r | |
1649 | VmPtr\r | |
1650 | );\r | |
1651 | return EFI_UNSUPPORTED;\r | |
1652 | }\r | |
1653 | \r | |
1654 | VmPtr->R[OPERAND1_REGNUM (Operands)] = ImmedIndex64;\r | |
1655 | } else {\r | |
1656 | //\r | |
1657 | // Get the address\r | |
1658 | //\r | |
1659 | Op1 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
1660 | VmWriteMemN (VmPtr, (UINTN) Op1, (INTN) ImmedIndex64);\r | |
1661 | }\r | |
1662 | //\r | |
1663 | // Advance the instruction pointer\r | |
1664 | //\r | |
1665 | VmPtr->Ip += Size;\r | |
1666 | return EFI_SUCCESS;\r | |
1667 | }\r | |
1668 | \r | |
1669 | STATIC\r | |
1670 | EFI_STATUS\r | |
1671 | ExecuteMOVREL (\r | |
1672 | IN VM_CONTEXT *VmPtr\r | |
1673 | )\r | |
1674 | /*++\r | |
1675 | \r | |
1676 | Routine Description:\r | |
1677 | \r | |
1678 | Execute the EBC MOVREL instruction.\r | |
1679 | Dest <- Ip + ImmData\r | |
1680 | \r | |
1681 | Arguments:\r | |
1682 | \r | |
1683 | VmPtr - pointer to a VM context \r | |
1684 | \r | |
1685 | Returns:\r | |
1686 | \r | |
1687 | Standard EFI_STATUS\r | |
1688 | \r | |
1689 | Instruction syntax:\r | |
1690 | \r | |
1691 | MOVREL[w|d|q] {@}R1 {Index16}, ImmData16|32|64\r | |
1692 | \r | |
1693 | --*/\r | |
1694 | {\r | |
1695 | UINT8 Opcode;\r | |
1696 | UINT8 Operands;\r | |
1697 | UINT8 Size;\r | |
1698 | INT16 Index16;\r | |
1699 | INT64 ImmData64;\r | |
1700 | UINT64 Op1;\r | |
1701 | UINT64 Op2;\r | |
1702 | \r | |
1703 | //\r | |
1704 | // Get the opcode and operands byte so we can get R1 and R2\r | |
1705 | //\r | |
1706 | Opcode = GETOPCODE (VmPtr);\r | |
1707 | Operands = GETOPERANDS (VmPtr);\r | |
1708 | \r | |
1709 | //\r | |
1710 | // Get the Operand 1 index (16-bit) if present\r | |
1711 | //\r | |
1712 | if (Operands & MOVI_M_IMMDATA) {\r | |
1713 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1714 | Size = 4;\r | |
1715 | } else {\r | |
1716 | Index16 = 0;\r | |
1717 | Size = 2;\r | |
1718 | }\r | |
1719 | //\r | |
1720 | // Get the immediate data.\r | |
1721 | //\r | |
1722 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
1723 | ImmData64 = (INT64) VmReadImmed16 (VmPtr, Size);\r | |
1724 | Size += 2;\r | |
1725 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
1726 | ImmData64 = (INT64) VmReadImmed32 (VmPtr, Size);\r | |
1727 | Size += 4;\r | |
1728 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
1729 | ImmData64 = VmReadImmed64 (VmPtr, Size);\r | |
1730 | Size += 8;\r | |
1731 | } else {\r | |
1732 | //\r | |
1733 | // Invalid encoding\r | |
1734 | //\r | |
1735 | EbcDebugSignalException (\r | |
1736 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1737 | EXCEPTION_FLAG_FATAL,\r | |
1738 | VmPtr\r | |
1739 | );\r | |
1740 | return EFI_UNSUPPORTED;\r | |
1741 | }\r | |
1742 | //\r | |
1743 | // Compute the value and write back the result\r | |
1744 | //\r | |
1745 | Op2 = (UINT64) ((INT64) ((UINT64) (UINTN) VmPtr->Ip) + (INT64) ImmData64 + Size);\r | |
1746 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1747 | //\r | |
1748 | // Check for illegal combination of operand1 direct with immediate data\r | |
1749 | //\r | |
1750 | if (Operands & MOVI_M_IMMDATA) {\r | |
1751 | EbcDebugSignalException (\r | |
1752 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1753 | EXCEPTION_FLAG_FATAL,\r | |
1754 | VmPtr\r | |
1755 | );\r | |
1756 | return EFI_UNSUPPORTED;\r | |
1757 | }\r | |
1758 | \r | |
1759 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (VM_REGISTER) Op2;\r | |
1760 | } else {\r | |
1761 | //\r | |
1762 | // Get the address = [Rx] + Index16\r | |
1763 | // Write back the result. Always a natural size write, since\r | |
1764 | // we're talking addresses here.\r | |
1765 | //\r | |
1766 | Op1 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
1767 | VmWriteMemN (VmPtr, (UINTN) Op1, (UINTN) Op2);\r | |
1768 | }\r | |
1769 | //\r | |
1770 | // Advance the instruction pointer\r | |
1771 | //\r | |
1772 | VmPtr->Ip += Size;\r | |
1773 | return EFI_SUCCESS;\r | |
1774 | }\r | |
1775 | \r | |
1776 | STATIC\r | |
1777 | EFI_STATUS\r | |
1778 | ExecuteMOVsnw (\r | |
1779 | IN VM_CONTEXT *VmPtr\r | |
1780 | )\r | |
1781 | /*++\r | |
1782 | \r | |
1783 | Routine Description:\r | |
1784 | \r | |
1785 | Execute the EBC MOVsnw instruction. This instruction loads a signed \r | |
1786 | natural value from memory or register to another memory or register. On\r | |
1787 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
1788 | is a register.\r | |
1789 | \r | |
1790 | Arguments:\r | |
1791 | \r | |
1792 | VmPtr - pointer to a VM context \r | |
1793 | \r | |
1794 | Returns:\r | |
1795 | \r | |
1796 | Standard EFI_STATUS\r | |
1797 | \r | |
1798 | Instruction syntax:\r | |
1799 | \r | |
1800 | MOVsnw {@}R1 {Index16}, {@}R2 {Index16|Immed16}\r | |
1801 | \r | |
1802 | 0:7 1=>operand1 index present\r | |
1803 | 0:6 1=>operand2 index present\r | |
1804 | \r | |
1805 | --*/\r | |
1806 | {\r | |
1807 | UINT8 Opcode;\r | |
1808 | UINT8 Operands;\r | |
1809 | UINT8 Size;\r | |
1810 | INT16 Op1Index;\r | |
1811 | INT16 Op2Index;\r | |
1812 | UINT64 Op2;\r | |
1813 | \r | |
1814 | //\r | |
1815 | // Get the opcode and operand bytes\r | |
1816 | //\r | |
1817 | Opcode = GETOPCODE (VmPtr);\r | |
1818 | Operands = GETOPERANDS (VmPtr);\r | |
1819 | \r | |
1820 | Op1Index = Op2Index = 0;\r | |
1821 | \r | |
1822 | //\r | |
1823 | // Get the indexes if present.\r | |
1824 | //\r | |
1825 | Size = 2;\r | |
1826 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
1827 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1828 | Op1Index = VmReadIndex16 (VmPtr, 2);\r | |
1829 | } else {\r | |
1830 | //\r | |
1831 | // Illegal form operand1 direct with index: MOVsnw R1 Index16, {@}R2\r | |
1832 | //\r | |
1833 | EbcDebugSignalException (\r | |
1834 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1835 | EXCEPTION_FLAG_FATAL,\r | |
1836 | VmPtr\r | |
1837 | );\r | |
1838 | return EFI_UNSUPPORTED;\r | |
1839 | }\r | |
1840 | \r | |
1841 | Size += sizeof (UINT16);\r | |
1842 | }\r | |
1843 | \r | |
1844 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
1845 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1846 | Op2Index = VmReadIndex16 (VmPtr, Size);\r | |
1847 | } else {\r | |
1848 | Op2Index = VmReadImmed16 (VmPtr, Size);\r | |
1849 | }\r | |
1850 | \r | |
1851 | Size += sizeof (UINT16);\r | |
1852 | }\r | |
1853 | //\r | |
1854 | // Get the data from the source.\r | |
1855 | //\r | |
1856 | Op2 = (INT64) ((INTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Op2Index));\r | |
1857 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1858 | Op2 = (INT64) (INTN) VmReadMemN (VmPtr, (UINTN) Op2);\r | |
1859 | }\r | |
1860 | //\r | |
1861 | // Now write back the result.\r | |
1862 | //\r | |
1863 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1864 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Op2;\r | |
1865 | } else {\r | |
1866 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Op1Index), (UINTN) Op2);\r | |
1867 | }\r | |
1868 | //\r | |
1869 | // Advance the instruction pointer\r | |
1870 | //\r | |
1871 | VmPtr->Ip += Size;\r | |
1872 | return EFI_SUCCESS;\r | |
1873 | }\r | |
1874 | \r | |
1875 | STATIC\r | |
1876 | EFI_STATUS\r | |
1877 | ExecuteMOVsnd (\r | |
1878 | IN VM_CONTEXT *VmPtr\r | |
1879 | )\r | |
1880 | /*++\r | |
1881 | \r | |
1882 | Routine Description:\r | |
1883 | \r | |
1884 | Execute the EBC MOVsnw instruction. This instruction loads a signed \r | |
1885 | natural value from memory or register to another memory or register. On\r | |
1886 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
1887 | is a register.\r | |
1888 | \r | |
1889 | Arguments:\r | |
1890 | \r | |
1891 | VmPtr - pointer to a VM context \r | |
1892 | \r | |
1893 | Returns:\r | |
1894 | \r | |
1895 | Standard EFI_STATUS\r | |
1896 | \r | |
1897 | Instruction syntax:\r | |
1898 | \r | |
1899 | MOVsnd {@}R1 {Indx32}, {@}R2 {Index32|Immed32}\r | |
1900 | \r | |
1901 | 0:7 1=>operand1 index present\r | |
1902 | 0:6 1=>operand2 index present\r | |
1903 | \r | |
1904 | --*/\r | |
1905 | {\r | |
1906 | UINT8 Opcode;\r | |
1907 | UINT8 Operands;\r | |
1908 | UINT8 Size;\r | |
1909 | INT32 Op1Index;\r | |
1910 | INT32 Op2Index;\r | |
1911 | UINT64 Op2;\r | |
1912 | \r | |
1913 | //\r | |
1914 | // Get the opcode and operand bytes\r | |
1915 | //\r | |
1916 | Opcode = GETOPCODE (VmPtr);\r | |
1917 | Operands = GETOPERANDS (VmPtr);\r | |
1918 | \r | |
1919 | Op1Index = Op2Index = 0;\r | |
1920 | \r | |
1921 | //\r | |
1922 | // Get the indexes if present.\r | |
1923 | //\r | |
1924 | Size = 2;\r | |
1925 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
1926 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1927 | Op1Index = VmReadIndex32 (VmPtr, 2);\r | |
1928 | } else {\r | |
1929 | //\r | |
1930 | // Illegal form operand1 direct with index: MOVsnd R1 Index16,..\r | |
1931 | //\r | |
1932 | EbcDebugSignalException (\r | |
1933 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1934 | EXCEPTION_FLAG_FATAL,\r | |
1935 | VmPtr\r | |
1936 | );\r | |
1937 | return EFI_UNSUPPORTED;\r | |
1938 | }\r | |
1939 | \r | |
1940 | Size += sizeof (UINT32);\r | |
1941 | }\r | |
1942 | \r | |
1943 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
1944 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1945 | Op2Index = VmReadIndex32 (VmPtr, Size);\r | |
1946 | } else {\r | |
1947 | Op2Index = VmReadImmed32 (VmPtr, Size);\r | |
1948 | }\r | |
1949 | \r | |
1950 | Size += sizeof (UINT32);\r | |
1951 | }\r | |
1952 | //\r | |
1953 | // Get the data from the source.\r | |
1954 | //\r | |
1955 | Op2 = (INT64) ((INTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Op2Index));\r | |
1956 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1957 | Op2 = (INT64) (INTN) VmReadMemN (VmPtr, (UINTN) Op2);\r | |
1958 | }\r | |
1959 | //\r | |
1960 | // Now write back the result.\r | |
1961 | //\r | |
1962 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1963 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Op2;\r | |
1964 | } else {\r | |
1965 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Op1Index), (UINTN) Op2);\r | |
1966 | }\r | |
1967 | //\r | |
1968 | // Advance the instruction pointer\r | |
1969 | //\r | |
1970 | VmPtr->Ip += Size;\r | |
1971 | return EFI_SUCCESS;\r | |
1972 | }\r | |
1973 | \r | |
1974 | STATIC\r | |
1975 | EFI_STATUS\r | |
1976 | ExecutePUSHn (\r | |
1977 | IN VM_CONTEXT *VmPtr\r | |
1978 | )\r | |
1979 | /*++\r | |
1980 | \r | |
1981 | Routine Description:\r | |
1982 | Execute the EBC PUSHn instruction\r | |
1983 | \r | |
1984 | Arguments:\r | |
1985 | VmPtr - pointer to a VM context \r | |
1986 | \r | |
1987 | Returns:\r | |
1988 | Standard EFI_STATUS\r | |
1989 | \r | |
1990 | Instruction syntax:\r | |
1991 | PUSHn {@}R1 {Index16|Immed16}\r | |
1992 | \r | |
1993 | --*/\r | |
1994 | {\r | |
1995 | UINT8 Opcode;\r | |
1996 | UINT8 Operands;\r | |
1997 | INT16 Index16;\r | |
1998 | UINTN DataN;\r | |
1999 | \r | |
2000 | //\r | |
2001 | // Get opcode and operands\r | |
2002 | //\r | |
2003 | Opcode = GETOPCODE (VmPtr);\r | |
2004 | Operands = GETOPERANDS (VmPtr);\r | |
2005 | \r | |
2006 | //\r | |
2007 | // Get index if present\r | |
2008 | //\r | |
2009 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
2010 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2011 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2012 | } else {\r | |
2013 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2014 | }\r | |
2015 | \r | |
2016 | VmPtr->Ip += 4;\r | |
2017 | } else {\r | |
2018 | Index16 = 0;\r | |
2019 | VmPtr->Ip += 2;\r | |
2020 | }\r | |
2021 | //\r | |
2022 | // Get the data to push\r | |
2023 | //\r | |
2024 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2025 | DataN = VmReadMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2026 | } else {\r | |
2027 | DataN = (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16);\r | |
2028 | }\r | |
2029 | //\r | |
2030 | // Adjust the stack down.\r | |
2031 | //\r | |
2032 | VmPtr->R[0] -= sizeof (UINTN);\r | |
2033 | VmWriteMemN (VmPtr, (UINTN) VmPtr->R[0], DataN);\r | |
2034 | return EFI_SUCCESS;\r | |
2035 | }\r | |
2036 | \r | |
2037 | STATIC\r | |
2038 | EFI_STATUS\r | |
2039 | ExecutePUSH (\r | |
2040 | IN VM_CONTEXT *VmPtr\r | |
2041 | )\r | |
2042 | /*++\r | |
2043 | \r | |
2044 | Routine Description:\r | |
2045 | Execute the EBC PUSH instruction\r | |
2046 | \r | |
2047 | Arguments:\r | |
2048 | VmPtr - pointer to a VM context \r | |
2049 | \r | |
2050 | Returns:\r | |
2051 | Standard EFI_STATUS\r | |
2052 | \r | |
2053 | Instruction syntax:\r | |
2054 | PUSH[32|64] {@}R1 {Index16|Immed16}\r | |
2055 | \r | |
2056 | --*/\r | |
2057 | {\r | |
2058 | UINT8 Opcode;\r | |
2059 | UINT8 Operands;\r | |
2060 | UINT32 Data32;\r | |
2061 | UINT64 Data64;\r | |
2062 | INT16 Index16;\r | |
2063 | \r | |
2064 | //\r | |
2065 | // Get opcode and operands\r | |
2066 | //\r | |
2067 | Opcode = GETOPCODE (VmPtr);\r | |
2068 | Operands = GETOPERANDS (VmPtr);\r | |
2069 | //\r | |
2070 | // Get immediate index if present, then advance the IP.\r | |
2071 | //\r | |
2072 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
2073 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2074 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2075 | } else {\r | |
2076 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2077 | }\r | |
2078 | \r | |
2079 | VmPtr->Ip += 4;\r | |
2080 | } else {\r | |
2081 | Index16 = 0;\r | |
2082 | VmPtr->Ip += 2;\r | |
2083 | }\r | |
2084 | //\r | |
2085 | // Get the data to push\r | |
2086 | //\r | |
2087 | if (Opcode & PUSHPOP_M_64) {\r | |
2088 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2089 | Data64 = VmReadMem64 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2090 | } else {\r | |
2091 | Data64 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2092 | }\r | |
2093 | //\r | |
2094 | // Adjust the stack down, then write back the data\r | |
2095 | //\r | |
2096 | VmPtr->R[0] -= sizeof (UINT64);\r | |
2097 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[0], Data64);\r | |
2098 | } else {\r | |
2099 | //\r | |
2100 | // 32-bit data\r | |
2101 | //\r | |
2102 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2103 | Data32 = VmReadMem32 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2104 | } else {\r | |
2105 | Data32 = (UINT32) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2106 | }\r | |
2107 | //\r | |
2108 | // Adjust the stack down and write the data\r | |
2109 | //\r | |
2110 | VmPtr->R[0] -= sizeof (UINT32);\r | |
2111 | VmWriteMem32 (VmPtr, (UINTN) VmPtr->R[0], Data32);\r | |
2112 | }\r | |
2113 | \r | |
2114 | return EFI_SUCCESS;\r | |
2115 | }\r | |
2116 | \r | |
2117 | STATIC\r | |
2118 | EFI_STATUS\r | |
2119 | ExecutePOPn (\r | |
2120 | IN VM_CONTEXT *VmPtr\r | |
2121 | )\r | |
2122 | /*++\r | |
2123 | \r | |
2124 | Routine Description:\r | |
2125 | Execute the EBC POPn instruction\r | |
2126 | \r | |
2127 | Arguments:\r | |
2128 | VmPtr - pointer to a VM context \r | |
2129 | \r | |
2130 | Returns:\r | |
2131 | Standard EFI_STATUS\r | |
2132 | \r | |
2133 | Instruction syntax:\r | |
2134 | POPn {@}R1 {Index16|Immed16}\r | |
2135 | \r | |
2136 | --*/\r | |
2137 | {\r | |
2138 | UINT8 Opcode;\r | |
2139 | UINT8 Operands;\r | |
2140 | INT16 Index16;\r | |
2141 | UINTN DataN;\r | |
2142 | \r | |
2143 | //\r | |
2144 | // Get opcode and operands\r | |
2145 | //\r | |
2146 | Opcode = GETOPCODE (VmPtr);\r | |
2147 | Operands = GETOPERANDS (VmPtr);\r | |
2148 | //\r | |
2149 | // Get immediate data if present, and advance the IP\r | |
2150 | //\r | |
2151 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
2152 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2153 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2154 | } else {\r | |
2155 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2156 | }\r | |
2157 | \r | |
2158 | VmPtr->Ip += 4;\r | |
2159 | } else {\r | |
2160 | Index16 = 0;\r | |
2161 | VmPtr->Ip += 2;\r | |
2162 | }\r | |
2163 | //\r | |
2164 | // Read the data off the stack, then adjust the stack pointer\r | |
2165 | //\r | |
2166 | DataN = VmReadMemN (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2167 | VmPtr->R[0] += sizeof (UINTN);\r | |
2168 | //\r | |
2169 | // Do the write-back\r | |
2170 | //\r | |
2171 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2172 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16), DataN);\r | |
2173 | } else {\r | |
2174 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (INT64) (UINT64) ((UINTN) DataN + Index16);\r | |
2175 | }\r | |
2176 | \r | |
2177 | return EFI_SUCCESS;\r | |
2178 | }\r | |
2179 | \r | |
2180 | STATIC\r | |
2181 | EFI_STATUS\r | |
2182 | ExecutePOP (\r | |
2183 | IN VM_CONTEXT *VmPtr\r | |
2184 | )\r | |
2185 | /*++\r | |
2186 | \r | |
2187 | Routine Description:\r | |
2188 | Execute the EBC POP instruction\r | |
2189 | \r | |
2190 | Arguments:\r | |
2191 | VmPtr - pointer to a VM context \r | |
2192 | \r | |
2193 | Returns:\r | |
2194 | Standard EFI_STATUS\r | |
2195 | \r | |
2196 | Instruction syntax:\r | |
2197 | POP {@}R1 {Index16|Immed16}\r | |
2198 | \r | |
2199 | --*/\r | |
2200 | {\r | |
2201 | UINT8 Opcode;\r | |
2202 | UINT8 Operands;\r | |
2203 | INT16 Index16;\r | |
2204 | INT32 Data32;\r | |
2205 | UINT64 Data64;\r | |
2206 | \r | |
2207 | //\r | |
2208 | // Get opcode and operands\r | |
2209 | //\r | |
2210 | Opcode = GETOPCODE (VmPtr);\r | |
2211 | Operands = GETOPERANDS (VmPtr);\r | |
2212 | //\r | |
2213 | // Get immediate data if present, and advance the IP.\r | |
2214 | //\r | |
2215 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
2216 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2217 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2218 | } else {\r | |
2219 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2220 | }\r | |
2221 | \r | |
2222 | VmPtr->Ip += 4;\r | |
2223 | } else {\r | |
2224 | Index16 = 0;\r | |
2225 | VmPtr->Ip += 2;\r | |
2226 | }\r | |
2227 | //\r | |
2228 | // Get the data off the stack, then write it to the appropriate location\r | |
2229 | //\r | |
2230 | if (Opcode & PUSHPOP_M_64) {\r | |
2231 | //\r | |
2232 | // Read the data off the stack, then adjust the stack pointer\r | |
2233 | //\r | |
2234 | Data64 = VmReadMem64 (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2235 | VmPtr->R[0] += sizeof (UINT64);\r | |
2236 | //\r | |
2237 | // Do the write-back\r | |
2238 | //\r | |
2239 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2240 | VmWriteMem64 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16), Data64);\r | |
2241 | } else {\r | |
2242 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Data64 + Index16;\r | |
2243 | }\r | |
2244 | } else {\r | |
2245 | //\r | |
2246 | // 32-bit pop. Read it off the stack and adjust the stack pointer\r | |
2247 | //\r | |
2248 | Data32 = (INT32) VmReadMem32 (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2249 | VmPtr->R[0] += sizeof (UINT32);\r | |
2250 | //\r | |
2251 | // Do the write-back\r | |
2252 | //\r | |
2253 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2254 | VmWriteMem32 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16), Data32);\r | |
2255 | } else {\r | |
2256 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (INT64) Data32 + Index16;\r | |
2257 | }\r | |
2258 | }\r | |
2259 | \r | |
2260 | return EFI_SUCCESS;\r | |
2261 | }\r | |
2262 | \r | |
2263 | STATIC\r | |
2264 | EFI_STATUS\r | |
2265 | ExecuteCALL (\r | |
2266 | IN VM_CONTEXT *VmPtr\r | |
2267 | )\r | |
2268 | /*++\r | |
2269 | \r | |
2270 | Routine Description:\r | |
2271 | Implements the EBC CALL instruction.\r | |
2272 | \r | |
2273 | Instruction format: \r | |
2274 | \r | |
2275 | CALL64 Immed64\r | |
2276 | CALL32 {@}R1 {Immed32|Index32}\r | |
2277 | CALLEX64 Immed64\r | |
2278 | CALLEX16 {@}R1 {Immed32}\r | |
2279 | \r | |
2280 | If Rx == R0, then it's a PC relative call to PC = PC + imm32.\r | |
2281 | \r | |
2282 | Arguments:\r | |
2283 | VmPtr - pointer to a VM context.\r | |
2284 | \r | |
2285 | Returns:\r | |
2286 | Standard EFI_STATUS\r | |
2287 | \r | |
2288 | --*/\r | |
2289 | {\r | |
2290 | UINT8 Opcode;\r | |
2291 | UINT8 Operands;\r | |
2292 | INT32 Immed32;\r | |
2293 | UINT8 Size;\r | |
2294 | INT64 Immed64;\r | |
2295 | VOID *FramePtr;\r | |
2296 | \r | |
2297 | //\r | |
2298 | // Get opcode and operands\r | |
2299 | //\r | |
2300 | Opcode = GETOPCODE (VmPtr);\r | |
2301 | Operands = GETOPERANDS (VmPtr);\r | |
2302 | //\r | |
2303 | // Assign these as well to avoid compiler warnings\r | |
2304 | //\r | |
2305 | Immed64 = 0;\r | |
2306 | Immed32 = 0;\r | |
2307 | \r | |
2308 | FramePtr = VmPtr->FramePtr;\r | |
2309 | //\r | |
2310 | // Determine the instruction size, and get immediate data if present\r | |
2311 | //\r | |
2312 | if (Opcode & OPCODE_M_IMMDATA) {\r | |
2313 | if (Opcode & OPCODE_M_IMMDATA64) {\r | |
2314 | Immed64 = VmReadImmed64 (VmPtr, 2);\r | |
2315 | Size = 10;\r | |
2316 | } else {\r | |
2317 | //\r | |
2318 | // If register operand is indirect, then the immediate data is an index\r | |
2319 | //\r | |
2320 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2321 | Immed32 = VmReadIndex32 (VmPtr, 2);\r | |
2322 | } else {\r | |
2323 | Immed32 = VmReadImmed32 (VmPtr, 2);\r | |
2324 | }\r | |
2325 | \r | |
2326 | Size = 6;\r | |
2327 | }\r | |
2328 | } else {\r | |
2329 | Size = 2;\r | |
2330 | }\r | |
2331 | //\r | |
2332 | // If it's a call to EBC, adjust the stack pointer down 16 bytes and\r | |
2333 | // put our return address and frame pointer on the VM stack.\r | |
2334 | //\r | |
2335 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
2336 | VmPtr->R[0] -= 8;\r | |
2337 | VmWriteMemN (VmPtr, (UINTN) VmPtr->R[0], (UINTN) FramePtr);\r | |
2338 | VmPtr->FramePtr = (VOID *) (UINTN) VmPtr->R[0];\r | |
2339 | VmPtr->R[0] -= 8;\r | |
2340 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[0], (UINT64) (UINTN) (VmPtr->Ip + Size));\r | |
2341 | }\r | |
2342 | //\r | |
2343 | // If 64-bit data, then absolute jump only\r | |
2344 | //\r | |
2345 | if (Opcode & OPCODE_M_IMMDATA64) {\r | |
2346 | //\r | |
2347 | // Native or EBC call?\r | |
2348 | //\r | |
2349 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
2350 | VmPtr->Ip = (VMIP) (UINTN) Immed64;\r | |
2351 | } else {\r | |
2352 | //\r | |
2353 | // Call external function, get the return value, and advance the IP\r | |
2354 | //\r | |
2355 | EbcLLCALLEX (VmPtr, (UINTN) Immed64, (UINTN) VmPtr->R[0], FramePtr, Size);\r | |
2356 | }\r | |
2357 | } else {\r | |
2358 | //\r | |
2359 | // Get the register data. If operand1 == 0, then ignore register and\r | |
2360 | // take immediate data as relative or absolute address.\r | |
2361 | // Compiler should take care of upper bits if 32-bit machine.\r | |
2362 | //\r | |
2363 | if (OPERAND1_REGNUM (Operands) != 0) {\r | |
2364 | Immed64 = (UINT64) (UINTN) VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
2365 | }\r | |
2366 | //\r | |
2367 | // Get final address\r | |
2368 | //\r | |
2369 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2370 | Immed64 = (INT64) (UINT64) (UINTN) VmReadMemN (VmPtr, (UINTN) (Immed64 + Immed32));\r | |
2371 | } else {\r | |
2372 | Immed64 += Immed32;\r | |
2373 | }\r | |
2374 | //\r | |
2375 | // Now determine if external call, and then if relative or absolute\r | |
2376 | //\r | |
2377 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
2378 | //\r | |
2379 | // EBC call. Relative or absolute? If relative, then it's relative to the\r | |
2380 | // start of the next instruction.\r | |
2381 | //\r | |
2382 | if (Operands & OPERAND_M_RELATIVE_ADDR) {\r | |
2383 | VmPtr->Ip += Immed64 + Size;\r | |
2384 | } else {\r | |
2385 | VmPtr->Ip = (VMIP) (UINTN) Immed64;\r | |
2386 | }\r | |
2387 | } else {\r | |
2388 | //\r | |
2389 | // Native call. Relative or absolute?\r | |
2390 | //\r | |
2391 | if (Operands & OPERAND_M_RELATIVE_ADDR) {\r | |
2392 | EbcLLCALLEX (VmPtr, (UINTN) (Immed64 + VmPtr->Ip + Size), (UINTN) VmPtr->R[0], FramePtr, Size);\r | |
2393 | } else {\r | |
2394 | if (VmPtr->StopFlags & STOPFLAG_BREAK_ON_CALLEX) {\r | |
2395 | CpuBreakpoint ();\r | |
2396 | }\r | |
2397 | \r | |
2398 | EbcLLCALLEX (VmPtr, (UINTN) Immed64, (UINTN) VmPtr->R[0], FramePtr, Size);\r | |
2399 | }\r | |
2400 | }\r | |
2401 | }\r | |
2402 | \r | |
2403 | return EFI_SUCCESS;\r | |
2404 | }\r | |
2405 | \r | |
2406 | STATIC\r | |
2407 | EFI_STATUS\r | |
2408 | ExecuteRET (\r | |
2409 | IN VM_CONTEXT *VmPtr\r | |
2410 | )\r | |
2411 | /*++\r | |
2412 | \r | |
2413 | Routine Description:\r | |
2414 | Execute the EBC RET instruction\r | |
2415 | \r | |
2416 | Arguments:\r | |
2417 | VmPtr - pointer to a VM context \r | |
2418 | \r | |
2419 | Returns:\r | |
2420 | Standard EFI_STATUS\r | |
2421 | \r | |
2422 | Instruction syntax:\r | |
2423 | RET\r | |
2424 | \r | |
2425 | --*/\r | |
2426 | {\r | |
2427 | //\r | |
2428 | // If we're at the top of the stack, then simply set the done\r | |
2429 | // flag and return\r | |
2430 | //\r | |
2431 | if (VmPtr->StackRetAddr == (UINT64) VmPtr->R[0]) {\r | |
2432 | VmPtr->StopFlags |= STOPFLAG_APP_DONE;\r | |
2433 | } else {\r | |
2434 | //\r | |
2435 | // Pull the return address off the VM app's stack and set the IP\r | |
2436 | // to it\r | |
2437 | //\r | |
2438 | if (!IS_ALIGNED ((UINTN) VmPtr->R[0], sizeof (UINT16))) {\r | |
2439 | EbcDebugSignalException (\r | |
2440 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
2441 | EXCEPTION_FLAG_FATAL,\r | |
2442 | VmPtr\r | |
2443 | );\r | |
2444 | }\r | |
2445 | //\r | |
2446 | // Restore the IP and frame pointer from the stack\r | |
2447 | //\r | |
2448 | VmPtr->Ip = (VMIP) (UINTN) VmReadMem64 (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2449 | VmPtr->R[0] += 8;\r | |
2450 | VmPtr->FramePtr = (VOID *) VmReadMemN (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2451 | VmPtr->R[0] += 8;\r | |
2452 | }\r | |
2453 | \r | |
2454 | return EFI_SUCCESS;\r | |
2455 | }\r | |
2456 | \r | |
2457 | STATIC\r | |
2458 | EFI_STATUS\r | |
2459 | ExecuteCMP (\r | |
2460 | IN VM_CONTEXT *VmPtr\r | |
2461 | )\r | |
2462 | /*++\r | |
2463 | \r | |
2464 | Routine Description:\r | |
2465 | Execute the EBC CMP instruction\r | |
2466 | \r | |
2467 | Arguments:\r | |
2468 | VmPtr - pointer to a VM context \r | |
2469 | \r | |
2470 | Returns:\r | |
2471 | Standard EFI_STATUS\r | |
2472 | \r | |
2473 | Instruction syntax:\r | |
2474 | CMP[32|64][eq|lte|gte|ulte|ugte] R1, {@}R2 {Index16|Immed16}\r | |
2475 | \r | |
2476 | --*/\r | |
2477 | {\r | |
2478 | UINT8 Opcode;\r | |
2479 | UINT8 Operands;\r | |
2480 | UINT8 Size;\r | |
2481 | INT16 Index16;\r | |
2482 | UINT32 Flag;\r | |
2483 | INT64 Op2;\r | |
2484 | INT64 Op1;\r | |
2485 | \r | |
2486 | //\r | |
2487 | // Get opcode and operands\r | |
2488 | //\r | |
2489 | Opcode = GETOPCODE (VmPtr);\r | |
2490 | Operands = GETOPERANDS (VmPtr);\r | |
2491 | //\r | |
2492 | // Get the register data we're going to compare to\r | |
2493 | //\r | |
2494 | Op1 = VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
2495 | //\r | |
2496 | // Get immediate data\r | |
2497 | //\r | |
2498 | if (Opcode & OPCODE_M_IMMDATA) {\r | |
2499 | if (OPERAND2_INDIRECT (Operands)) {\r | |
2500 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2501 | } else {\r | |
2502 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2503 | }\r | |
2504 | \r | |
2505 | Size = 4;\r | |
2506 | } else {\r | |
2507 | Index16 = 0;\r | |
2508 | Size = 2;\r | |
2509 | }\r | |
2510 | //\r | |
2511 | // Now get Op2\r | |
2512 | //\r | |
2513 | if (OPERAND2_INDIRECT (Operands)) {\r | |
2514 | if (Opcode & OPCODE_M_64BIT) {\r | |
2515 | Op2 = (INT64) VmReadMem64 (VmPtr, (UINTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16));\r | |
2516 | } else {\r | |
2517 | //\r | |
2518 | // 32-bit operations. 0-extend the values for all cases.\r | |
2519 | //\r | |
2520 | Op2 = (INT64) (UINT64) ((UINT32) VmReadMem32 (VmPtr, (UINTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16)));\r | |
2521 | }\r | |
2522 | } else {\r | |
2523 | Op2 = VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16;\r | |
2524 | }\r | |
2525 | //\r | |
2526 | // Now do the compare\r | |
2527 | //\r | |
2528 | Flag = 0;\r | |
2529 | if (Opcode & OPCODE_M_64BIT) {\r | |
2530 | //\r | |
2531 | // 64-bit compares\r | |
2532 | //\r | |
2533 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2534 | case OPCODE_CMPEQ:\r | |
2535 | if (Op1 == Op2) {\r | |
2536 | Flag = 1;\r | |
2537 | }\r | |
2538 | break;\r | |
2539 | \r | |
2540 | case OPCODE_CMPLTE:\r | |
2541 | if (Op1 <= Op2) {\r | |
2542 | Flag = 1;\r | |
2543 | }\r | |
2544 | break;\r | |
2545 | \r | |
2546 | case OPCODE_CMPGTE:\r | |
2547 | if (Op1 >= Op2) {\r | |
2548 | Flag = 1;\r | |
2549 | }\r | |
2550 | break;\r | |
2551 | \r | |
2552 | case OPCODE_CMPULTE:\r | |
2553 | if ((UINT64) Op1 <= (UINT64) Op2) {\r | |
2554 | Flag = 1;\r | |
2555 | }\r | |
2556 | break;\r | |
2557 | \r | |
2558 | case OPCODE_CMPUGTE:\r | |
2559 | if ((UINT64) Op1 >= (UINT64) Op2) {\r | |
2560 | Flag = 1;\r | |
2561 | }\r | |
2562 | break;\r | |
2563 | \r | |
2564 | default:\r | |
2565 | ASSERT (0);\r | |
2566 | }\r | |
2567 | } else {\r | |
2568 | //\r | |
2569 | // 32-bit compares\r | |
2570 | //\r | |
2571 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2572 | case OPCODE_CMPEQ:\r | |
2573 | if ((INT32) Op1 == (INT32) Op2) {\r | |
2574 | Flag = 1;\r | |
2575 | }\r | |
2576 | break;\r | |
2577 | \r | |
2578 | case OPCODE_CMPLTE:\r | |
2579 | if ((INT32) Op1 <= (INT32) Op2) {\r | |
2580 | Flag = 1;\r | |
2581 | }\r | |
2582 | break;\r | |
2583 | \r | |
2584 | case OPCODE_CMPGTE:\r | |
2585 | if ((INT32) Op1 >= (INT32) Op2) {\r | |
2586 | Flag = 1;\r | |
2587 | }\r | |
2588 | break;\r | |
2589 | \r | |
2590 | case OPCODE_CMPULTE:\r | |
2591 | if ((UINT32) Op1 <= (UINT32) Op2) {\r | |
2592 | Flag = 1;\r | |
2593 | }\r | |
2594 | break;\r | |
2595 | \r | |
2596 | case OPCODE_CMPUGTE:\r | |
2597 | if ((UINT32) Op1 >= (UINT32) Op2) {\r | |
2598 | Flag = 1;\r | |
2599 | }\r | |
2600 | break;\r | |
2601 | \r | |
2602 | default:\r | |
2603 | ASSERT (0);\r | |
2604 | }\r | |
2605 | }\r | |
2606 | //\r | |
2607 | // Now set the flag accordingly for the comparison\r | |
2608 | //\r | |
2609 | if (Flag) {\r | |
2610 | VMFLAG_SET (VmPtr, VMFLAGS_CC);\r | |
2611 | } else {\r | |
2612 | VMFLAG_CLEAR (VmPtr, VMFLAGS_CC);\r | |
2613 | }\r | |
2614 | //\r | |
2615 | // Advance the IP\r | |
2616 | //\r | |
2617 | VmPtr->Ip += Size;\r | |
2618 | return EFI_SUCCESS;\r | |
2619 | }\r | |
2620 | \r | |
2621 | STATIC\r | |
2622 | EFI_STATUS\r | |
2623 | ExecuteCMPI (\r | |
2624 | IN VM_CONTEXT *VmPtr\r | |
2625 | )\r | |
2626 | /*++\r | |
2627 | \r | |
2628 | Routine Description:\r | |
2629 | Execute the EBC CMPI instruction\r | |
2630 | \r | |
2631 | Arguments:\r | |
2632 | VmPtr - pointer to a VM context \r | |
2633 | \r | |
2634 | Returns:\r | |
2635 | Standard EFI_STATUS\r | |
2636 | \r | |
2637 | Instruction syntax:\r | |
2638 | CMPI[32|64]{w|d}[eq|lte|gte|ulte|ugte] {@}Rx {Index16}, Immed16|Immed32\r | |
2639 | \r | |
2640 | --*/\r | |
2641 | {\r | |
2642 | UINT8 Opcode;\r | |
2643 | UINT8 Operands;\r | |
2644 | UINT8 Size;\r | |
2645 | INT64 Op1;\r | |
2646 | INT64 Op2;\r | |
2647 | INT16 Index16;\r | |
2648 | UINT32 Flag;\r | |
2649 | \r | |
2650 | //\r | |
2651 | // Get opcode and operands\r | |
2652 | //\r | |
2653 | Opcode = GETOPCODE (VmPtr);\r | |
2654 | Operands = GETOPERANDS (VmPtr);\r | |
2655 | \r | |
2656 | //\r | |
2657 | // Get operand1 index if present\r | |
2658 | //\r | |
2659 | Size = 2;\r | |
2660 | if (Operands & OPERAND_M_CMPI_INDEX) {\r | |
2661 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2662 | Size += 2;\r | |
2663 | } else {\r | |
2664 | Index16 = 0;\r | |
2665 | }\r | |
2666 | //\r | |
2667 | // Get operand1 data we're going to compare to\r | |
2668 | //\r | |
2669 | Op1 = (INT64) VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
2670 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2671 | //\r | |
2672 | // Indirect operand1. Fetch 32 or 64-bit value based on compare size.\r | |
2673 | //\r | |
2674 | if (Opcode & OPCODE_M_CMPI64) {\r | |
2675 | Op1 = (INT64) VmReadMem64 (VmPtr, (UINTN) Op1 + Index16);\r | |
2676 | } else {\r | |
2677 | Op1 = (INT64) VmReadMem32 (VmPtr, (UINTN) Op1 + Index16);\r | |
2678 | }\r | |
2679 | } else {\r | |
2680 | //\r | |
2681 | // Better not have been an index with direct. That is, CMPI R1 Index,...\r | |
2682 | // is illegal.\r | |
2683 | //\r | |
2684 | if (Operands & OPERAND_M_CMPI_INDEX) {\r | |
2685 | EbcDebugSignalException (\r | |
2686 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2687 | EXCEPTION_FLAG_ERROR,\r | |
2688 | VmPtr\r | |
2689 | );\r | |
2690 | VmPtr->Ip += Size;\r | |
2691 | return EFI_UNSUPPORTED;\r | |
2692 | }\r | |
2693 | }\r | |
2694 | //\r | |
2695 | // Get immediate data -- 16- or 32-bit sign extended\r | |
2696 | //\r | |
2697 | if (Opcode & OPCODE_M_CMPI32_DATA) {\r | |
2698 | Op2 = (INT64) VmReadImmed32 (VmPtr, Size);\r | |
2699 | Size += 4;\r | |
2700 | } else {\r | |
2701 | //\r | |
2702 | // 16-bit immediate data. Sign extend always.\r | |
2703 | //\r | |
2704 | Op2 = (INT64) ((INT16) VmReadImmed16 (VmPtr, Size));\r | |
2705 | Size += 2;\r | |
2706 | }\r | |
2707 | //\r | |
2708 | // Now do the compare\r | |
2709 | //\r | |
2710 | Flag = 0;\r | |
2711 | if (Opcode & OPCODE_M_CMPI64) {\r | |
2712 | //\r | |
2713 | // 64 bit comparison\r | |
2714 | //\r | |
2715 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2716 | case OPCODE_CMPIEQ:\r | |
2717 | if (Op1 == (INT64) Op2) {\r | |
2718 | Flag = 1;\r | |
2719 | }\r | |
2720 | break;\r | |
2721 | \r | |
2722 | case OPCODE_CMPILTE:\r | |
2723 | if (Op1 <= (INT64) Op2) {\r | |
2724 | Flag = 1;\r | |
2725 | }\r | |
2726 | break;\r | |
2727 | \r | |
2728 | case OPCODE_CMPIGTE:\r | |
2729 | if (Op1 >= (INT64) Op2) {\r | |
2730 | Flag = 1;\r | |
2731 | }\r | |
2732 | break;\r | |
2733 | \r | |
2734 | case OPCODE_CMPIULTE:\r | |
2735 | if ((UINT64) Op1 <= (UINT64) ((UINT32) Op2)) {\r | |
2736 | Flag = 1;\r | |
2737 | }\r | |
2738 | break;\r | |
2739 | \r | |
2740 | case OPCODE_CMPIUGTE:\r | |
2741 | if ((UINT64) Op1 >= (UINT64) ((UINT32) Op2)) {\r | |
2742 | Flag = 1;\r | |
2743 | }\r | |
2744 | break;\r | |
2745 | \r | |
2746 | default:\r | |
2747 | ASSERT (0);\r | |
2748 | }\r | |
2749 | } else {\r | |
2750 | //\r | |
2751 | // 32-bit comparisons\r | |
2752 | //\r | |
2753 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2754 | case OPCODE_CMPIEQ:\r | |
2755 | if ((INT32) Op1 == Op2) {\r | |
2756 | Flag = 1;\r | |
2757 | }\r | |
2758 | break;\r | |
2759 | \r | |
2760 | case OPCODE_CMPILTE:\r | |
2761 | if ((INT32) Op1 <= Op2) {\r | |
2762 | Flag = 1;\r | |
2763 | }\r | |
2764 | break;\r | |
2765 | \r | |
2766 | case OPCODE_CMPIGTE:\r | |
2767 | if ((INT32) Op1 >= Op2) {\r | |
2768 | Flag = 1;\r | |
2769 | }\r | |
2770 | break;\r | |
2771 | \r | |
2772 | case OPCODE_CMPIULTE:\r | |
2773 | if ((UINT32) Op1 <= (UINT32) Op2) {\r | |
2774 | Flag = 1;\r | |
2775 | }\r | |
2776 | break;\r | |
2777 | \r | |
2778 | case OPCODE_CMPIUGTE:\r | |
2779 | if ((UINT32) Op1 >= (UINT32) Op2) {\r | |
2780 | Flag = 1;\r | |
2781 | }\r | |
2782 | break;\r | |
2783 | \r | |
2784 | default:\r | |
2785 | ASSERT (0);\r | |
2786 | }\r | |
2787 | }\r | |
2788 | //\r | |
2789 | // Now set the flag accordingly for the comparison\r | |
2790 | //\r | |
2791 | if (Flag) {\r | |
2792 | VMFLAG_SET (VmPtr, VMFLAGS_CC);\r | |
2793 | } else {\r | |
2794 | VMFLAG_CLEAR (VmPtr, VMFLAGS_CC);\r | |
2795 | }\r | |
2796 | //\r | |
2797 | // Advance the IP\r | |
2798 | //\r | |
2799 | VmPtr->Ip += Size;\r | |
2800 | return EFI_SUCCESS;\r | |
2801 | }\r | |
2802 | \r | |
2803 | STATIC\r | |
2804 | UINT64\r | |
2805 | ExecuteNOT (\r | |
2806 | IN VM_CONTEXT *VmPtr,\r | |
2807 | IN UINT64 Op1,\r | |
2808 | IN UINT64 Op2\r | |
2809 | )\r | |
2810 | /*++\r | |
2811 | \r | |
2812 | Routine Description:\r | |
2813 | Execute the EBC NOT instruction\r | |
2814 | \r | |
2815 | Arguments:\r | |
2816 | VmPtr - pointer to a VM context \r | |
2817 | Op1 - Operand 1 from the instruction \r | |
2818 | Op2 - Operand 2 from the instruction\r | |
2819 | \r | |
2820 | Returns:\r | |
2821 | ~Op2\r | |
2822 | \r | |
2823 | Instruction syntax:\r | |
2824 | NOT[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2825 | \r | |
2826 | --*/\r | |
2827 | {\r | |
2828 | return ~Op2;\r | |
2829 | }\r | |
2830 | \r | |
2831 | STATIC\r | |
2832 | UINT64\r | |
2833 | ExecuteNEG (\r | |
2834 | IN VM_CONTEXT *VmPtr,\r | |
2835 | IN UINT64 Op1,\r | |
2836 | IN UINT64 Op2\r | |
2837 | )\r | |
2838 | /*++\r | |
2839 | \r | |
2840 | Routine Description:\r | |
2841 | Execute the EBC NEG instruction\r | |
2842 | \r | |
2843 | Arguments:\r | |
2844 | VmPtr - pointer to a VM context \r | |
2845 | Op1 - Operand 1 from the instruction \r | |
2846 | Op2 - Operand 2 from the instruction\r | |
2847 | \r | |
2848 | Returns:\r | |
2849 | Op2 * -1\r | |
2850 | \r | |
2851 | Instruction syntax:\r | |
2852 | NEG[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2853 | \r | |
2854 | --*/\r | |
2855 | {\r | |
2856 | return ~Op2 + 1;\r | |
2857 | }\r | |
2858 | \r | |
2859 | STATIC\r | |
2860 | UINT64\r | |
2861 | ExecuteADD (\r | |
2862 | IN VM_CONTEXT *VmPtr,\r | |
2863 | IN UINT64 Op1,\r | |
2864 | IN UINT64 Op2\r | |
2865 | )\r | |
2866 | /*++\r | |
2867 | \r | |
2868 | Routine Description:\r | |
2869 | \r | |
2870 | Execute the EBC ADD instruction\r | |
2871 | \r | |
2872 | Arguments:\r | |
2873 | VmPtr - pointer to a VM context \r | |
2874 | Op1 - Operand 1 from the instruction \r | |
2875 | Op2 - Operand 2 from the instruction\r | |
2876 | \r | |
2877 | Returns:\r | |
2878 | Op1 + Op2\r | |
2879 | \r | |
2880 | Instruction syntax:\r | |
2881 | ADD[32|64] {@}R1, {@}R2 {Index16}\r | |
2882 | \r | |
2883 | --*/\r | |
2884 | {\r | |
2885 | return Op1 + Op2;\r | |
2886 | }\r | |
2887 | \r | |
2888 | STATIC\r | |
2889 | UINT64\r | |
2890 | ExecuteSUB (\r | |
2891 | IN VM_CONTEXT *VmPtr,\r | |
2892 | IN UINT64 Op1,\r | |
2893 | IN UINT64 Op2\r | |
2894 | )\r | |
2895 | /*++\r | |
2896 | \r | |
2897 | Routine Description:\r | |
2898 | Execute the EBC SUB instruction\r | |
2899 | \r | |
2900 | Arguments:\r | |
2901 | VmPtr - pointer to a VM context \r | |
2902 | Op1 - Operand 1 from the instruction \r | |
2903 | Op2 - Operand 2 from the instruction\r | |
2904 | \r | |
2905 | Returns:\r | |
2906 | Op1 - Op2\r | |
2907 | Standard EFI_STATUS\r | |
2908 | \r | |
2909 | Instruction syntax:\r | |
2910 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2911 | \r | |
2912 | --*/\r | |
2913 | {\r | |
2914 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
2915 | return (UINT64) ((INT64) ((INT64) Op1 - (INT64) Op2));\r | |
2916 | } else {\r | |
2917 | return (UINT64) ((INT64) ((INT32) Op1 - (INT32) Op2));\r | |
2918 | }\r | |
2919 | }\r | |
2920 | \r | |
2921 | STATIC\r | |
2922 | UINT64\r | |
2923 | ExecuteMUL (\r | |
2924 | IN VM_CONTEXT *VmPtr,\r | |
2925 | IN UINT64 Op1,\r | |
2926 | IN UINT64 Op2\r | |
2927 | )\r | |
2928 | /*++\r | |
2929 | \r | |
2930 | Routine Description:\r | |
2931 | \r | |
2932 | Execute the EBC MUL instruction\r | |
2933 | \r | |
2934 | Arguments:\r | |
2935 | VmPtr - pointer to a VM context \r | |
2936 | Op1 - Operand 1 from the instruction \r | |
2937 | Op2 - Operand 2 from the instruction\r | |
2938 | \r | |
2939 | Returns:\r | |
2940 | Op1 * Op2\r | |
2941 | \r | |
2942 | Instruction syntax:\r | |
2943 | MUL[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2944 | \r | |
2945 | --*/\r | |
2946 | {\r | |
878ddf1f | 2947 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r |
6d7338ae | 2948 | return MultS64x64 ((INT64)Op1, (INT64)Op2);\r |
878ddf1f | 2949 | } else {\r |
2950 | return (UINT64) ((INT64) ((INT32) Op1 * (INT32) Op2));\r | |
2951 | }\r | |
2952 | }\r | |
2953 | \r | |
2954 | STATIC\r | |
2955 | UINT64\r | |
2956 | ExecuteMULU (\r | |
2957 | IN VM_CONTEXT *VmPtr,\r | |
2958 | IN UINT64 Op1,\r | |
2959 | IN UINT64 Op2\r | |
2960 | )\r | |
2961 | /*++\r | |
2962 | \r | |
2963 | Routine Description:\r | |
2964 | Execute the EBC MULU instruction\r | |
2965 | \r | |
2966 | Arguments:\r | |
2967 | VmPtr - pointer to a VM context \r | |
2968 | Op1 - Operand 1 from the instruction \r | |
2969 | Op2 - Operand 2 from the instruction\r | |
2970 | \r | |
2971 | Returns:\r | |
2972 | (unsigned)Op1 * (unsigned)Op2 \r | |
2973 | \r | |
2974 | Instruction syntax:\r | |
2975 | MULU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2976 | \r | |
2977 | --*/\r | |
2978 | {\r | |
878ddf1f | 2979 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r |
6d7338ae | 2980 | return MultU64x64 (Op1, Op2);\r |
878ddf1f | 2981 | } else {\r |
2982 | return (UINT64) ((UINT32) Op1 * (UINT32) Op2);\r | |
2983 | }\r | |
2984 | }\r | |
2985 | \r | |
2986 | STATIC\r | |
2987 | UINT64\r | |
2988 | ExecuteDIV (\r | |
2989 | IN VM_CONTEXT *VmPtr,\r | |
2990 | IN UINT64 Op1,\r | |
2991 | IN UINT64 Op2\r | |
2992 | )\r | |
2993 | /*++\r | |
2994 | \r | |
2995 | Routine Description:\r | |
2996 | \r | |
2997 | Execute the EBC DIV instruction\r | |
2998 | \r | |
2999 | Arguments:\r | |
3000 | VmPtr - pointer to a VM context \r | |
3001 | Op1 - Operand 1 from the instruction \r | |
3002 | Op2 - Operand 2 from the instruction\r | |
3003 | \r | |
3004 | Returns:\r | |
3005 | Op1/Op2\r | |
3006 | \r | |
3007 | Instruction syntax:\r | |
3008 | DIV[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3009 | \r | |
3010 | --*/\r | |
3011 | {\r | |
3012 | INT64 Remainder;\r | |
878ddf1f | 3013 | \r |
3014 | //\r | |
3015 | // Check for divide-by-0\r | |
3016 | //\r | |
3017 | if (Op2 == 0) {\r | |
3018 | EbcDebugSignalException (\r | |
3019 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3020 | EXCEPTION_FLAG_FATAL,\r | |
3021 | VmPtr\r | |
3022 | );\r | |
3023 | \r | |
3024 | return 0;\r | |
3025 | } else {\r | |
3026 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3027 | return (UINT64) (DivS64x64Remainder (Op1, Op2, &Remainder));\r |
878ddf1f | 3028 | } else {\r |
3029 | return (UINT64) ((INT64) ((INT32) Op1 / (INT32) Op2));\r | |
3030 | }\r | |
3031 | }\r | |
3032 | }\r | |
3033 | \r | |
3034 | STATIC\r | |
3035 | UINT64\r | |
3036 | ExecuteDIVU (\r | |
3037 | IN VM_CONTEXT *VmPtr,\r | |
3038 | IN UINT64 Op1,\r | |
3039 | IN UINT64 Op2\r | |
3040 | )\r | |
3041 | /*++\r | |
3042 | \r | |
3043 | Routine Description:\r | |
3044 | Execute the EBC DIVU instruction\r | |
3045 | \r | |
3046 | Arguments:\r | |
3047 | VmPtr - pointer to a VM context \r | |
3048 | Op1 - Operand 1 from the instruction \r | |
3049 | Op2 - Operand 2 from the instruction\r | |
3050 | \r | |
3051 | Returns:\r | |
3052 | (unsigned)Op1 / (unsigned)Op2\r | |
3053 | \r | |
3054 | Instruction syntax:\r | |
3055 | DIVU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3056 | \r | |
3057 | --*/\r | |
3058 | {\r | |
3059 | UINT64 Remainder;\r | |
878ddf1f | 3060 | \r |
3061 | //\r | |
3062 | // Check for divide-by-0\r | |
3063 | //\r | |
3064 | if (Op2 == 0) {\r | |
3065 | EbcDebugSignalException (\r | |
3066 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3067 | EXCEPTION_FLAG_FATAL,\r | |
3068 | VmPtr\r | |
3069 | );\r | |
3070 | return 0;\r | |
3071 | } else {\r | |
3072 | //\r | |
3073 | // Get the destination register\r | |
3074 | //\r | |
3075 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3076 | return (UINT64) (DivU64x64Remainder ((INT64)Op1, (INT64)Op2, &Remainder));\r |
878ddf1f | 3077 | } else {\r |
3078 | return (UINT64) ((UINT32) Op1 / (UINT32) Op2);\r | |
3079 | }\r | |
3080 | }\r | |
3081 | }\r | |
3082 | \r | |
3083 | STATIC\r | |
3084 | UINT64\r | |
3085 | ExecuteMOD (\r | |
3086 | IN VM_CONTEXT *VmPtr,\r | |
3087 | IN UINT64 Op1,\r | |
3088 | IN UINT64 Op2\r | |
3089 | )\r | |
3090 | /*++\r | |
3091 | \r | |
3092 | Routine Description:\r | |
3093 | Execute the EBC MOD instruction\r | |
3094 | \r | |
3095 | Arguments:\r | |
3096 | VmPtr - pointer to a VM context \r | |
3097 | Op1 - Operand 1 from the instruction \r | |
3098 | Op2 - Operand 2 from the instruction\r | |
3099 | \r | |
3100 | Returns:\r | |
3101 | Op1 MODULUS Op2\r | |
3102 | \r | |
3103 | Instruction syntax:\r | |
3104 | MOD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3105 | \r | |
3106 | --*/\r | |
3107 | {\r | |
3108 | INT64 Remainder;\r | |
878ddf1f | 3109 | \r |
3110 | //\r | |
3111 | // Check for divide-by-0\r | |
3112 | //\r | |
3113 | if (Op2 == 0) {\r | |
3114 | EbcDebugSignalException (\r | |
3115 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3116 | EXCEPTION_FLAG_FATAL,\r | |
3117 | VmPtr\r | |
3118 | );\r | |
3119 | return 0;\r | |
3120 | } else {\r | |
6d7338ae | 3121 | DivS64x64Remainder ((INT64)Op1, (INT64)Op2, &Remainder);\r |
878ddf1f | 3122 | return Remainder;\r |
3123 | }\r | |
3124 | }\r | |
3125 | \r | |
3126 | STATIC\r | |
3127 | UINT64\r | |
3128 | ExecuteMODU (\r | |
3129 | IN VM_CONTEXT *VmPtr,\r | |
3130 | IN UINT64 Op1,\r | |
3131 | IN UINT64 Op2\r | |
3132 | )\r | |
3133 | /*++\r | |
3134 | \r | |
3135 | Routine Description:\r | |
3136 | Execute the EBC MODU instruction\r | |
3137 | \r | |
3138 | Arguments:\r | |
3139 | VmPtr - pointer to a VM context \r | |
3140 | Op1 - Operand 1 from the instruction \r | |
3141 | Op2 - Operand 2 from the instruction\r | |
3142 | \r | |
3143 | Returns:\r | |
3144 | Op1 UNSIGNED_MODULUS Op2\r | |
3145 | \r | |
3146 | Instruction syntax:\r | |
3147 | MODU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3148 | \r | |
3149 | --*/\r | |
3150 | {\r | |
3151 | UINT64 Remainder;\r | |
878ddf1f | 3152 | \r |
3153 | //\r | |
3154 | // Check for divide-by-0\r | |
3155 | //\r | |
3156 | if (Op2 == 0) {\r | |
3157 | EbcDebugSignalException (\r | |
3158 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3159 | EXCEPTION_FLAG_FATAL,\r | |
3160 | VmPtr\r | |
3161 | );\r | |
3162 | return 0;\r | |
3163 | } else {\r | |
6d7338ae | 3164 | DivU64x64Remainder (Op1, Op2, &Remainder);\r |
878ddf1f | 3165 | return Remainder;\r |
3166 | }\r | |
3167 | }\r | |
3168 | \r | |
3169 | STATIC\r | |
3170 | UINT64\r | |
3171 | ExecuteAND (\r | |
3172 | IN VM_CONTEXT *VmPtr,\r | |
3173 | IN UINT64 Op1,\r | |
3174 | IN UINT64 Op2\r | |
3175 | )\r | |
3176 | /*++\r | |
3177 | \r | |
3178 | Routine Description:\r | |
3179 | Execute the EBC AND instruction\r | |
3180 | \r | |
3181 | Arguments:\r | |
3182 | VmPtr - pointer to a VM context \r | |
3183 | Op1 - Operand 1 from the instruction \r | |
3184 | Op2 - Operand 2 from the instruction\r | |
3185 | \r | |
3186 | Returns:\r | |
3187 | Op1 AND Op2\r | |
3188 | \r | |
3189 | Instruction syntax:\r | |
3190 | AND[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3191 | \r | |
3192 | --*/\r | |
3193 | {\r | |
3194 | return Op1 & Op2;\r | |
3195 | }\r | |
3196 | \r | |
3197 | STATIC\r | |
3198 | UINT64\r | |
3199 | ExecuteOR (\r | |
3200 | IN VM_CONTEXT *VmPtr,\r | |
3201 | IN UINT64 Op1,\r | |
3202 | IN UINT64 Op2\r | |
3203 | )\r | |
3204 | /*++\r | |
3205 | \r | |
3206 | Routine Description:\r | |
3207 | Execute the EBC OR instruction\r | |
3208 | \r | |
3209 | Arguments:\r | |
3210 | VmPtr - pointer to a VM context \r | |
3211 | Op1 - Operand 1 from the instruction \r | |
3212 | Op2 - Operand 2 from the instruction\r | |
3213 | \r | |
3214 | Returns:\r | |
3215 | Op1 OR Op2\r | |
3216 | \r | |
3217 | Instruction syntax:\r | |
3218 | OR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3219 | \r | |
3220 | --*/\r | |
3221 | {\r | |
3222 | return Op1 | Op2;\r | |
3223 | }\r | |
3224 | \r | |
3225 | STATIC\r | |
3226 | UINT64\r | |
3227 | ExecuteXOR (\r | |
3228 | IN VM_CONTEXT *VmPtr,\r | |
3229 | IN UINT64 Op1,\r | |
3230 | IN UINT64 Op2\r | |
3231 | )\r | |
3232 | /*++\r | |
3233 | \r | |
3234 | Routine Description:\r | |
3235 | Execute the EBC XOR instruction\r | |
3236 | \r | |
3237 | Arguments:\r | |
3238 | VmPtr - pointer to a VM context \r | |
3239 | Op1 - Operand 1 from the instruction \r | |
3240 | Op2 - Operand 2 from the instruction\r | |
3241 | \r | |
3242 | Returns:\r | |
3243 | Op1 XOR Op2\r | |
3244 | \r | |
3245 | Instruction syntax:\r | |
3246 | XOR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3247 | \r | |
3248 | --*/\r | |
3249 | {\r | |
3250 | return Op1 ^ Op2;\r | |
3251 | }\r | |
3252 | \r | |
3253 | STATIC\r | |
3254 | UINT64\r | |
3255 | ExecuteSHL (\r | |
3256 | IN VM_CONTEXT *VmPtr,\r | |
3257 | IN UINT64 Op1,\r | |
3258 | IN UINT64 Op2\r | |
3259 | )\r | |
3260 | /*++\r | |
3261 | \r | |
3262 | Routine Description:\r | |
3263 | \r | |
3264 | Execute the EBC SHL shift left instruction\r | |
3265 | \r | |
3266 | Arguments:\r | |
3267 | VmPtr - pointer to a VM context \r | |
3268 | Op1 - Operand 1 from the instruction \r | |
3269 | Op2 - Operand 2 from the instruction\r | |
3270 | \r | |
3271 | Returns:\r | |
3272 | Op1 << Op2\r | |
3273 | \r | |
3274 | Instruction syntax:\r | |
3275 | SHL[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3276 | \r | |
3277 | --*/\r | |
3278 | {\r | |
3279 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3280 | return LShiftU64 (Op1, (UINTN)Op2);\r |
878ddf1f | 3281 | } else {\r |
3282 | return (UINT64) ((UINT32) ((UINT32) Op1 << (UINT32) Op2));\r | |
3283 | }\r | |
3284 | }\r | |
3285 | \r | |
3286 | STATIC\r | |
3287 | UINT64\r | |
3288 | ExecuteSHR (\r | |
3289 | IN VM_CONTEXT *VmPtr,\r | |
3290 | IN UINT64 Op1,\r | |
3291 | IN UINT64 Op2\r | |
3292 | )\r | |
3293 | /*++\r | |
3294 | \r | |
3295 | Routine Description:\r | |
3296 | Execute the EBC SHR instruction\r | |
3297 | \r | |
3298 | Arguments:\r | |
3299 | VmPtr - pointer to a VM context \r | |
3300 | Op1 - Operand 1 from the instruction \r | |
3301 | Op2 - Operand 2 from the instruction\r | |
3302 | \r | |
3303 | Returns:\r | |
3304 | Op1 >> Op2 (unsigned operands)\r | |
3305 | \r | |
3306 | Instruction syntax:\r | |
3307 | SHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3308 | \r | |
3309 | --*/\r | |
3310 | {\r | |
3311 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3312 | return RShiftU64 (Op1, (UINTN)Op2);\r |
878ddf1f | 3313 | } else {\r |
3314 | return (UINT64) ((UINT32) Op1 >> (UINT32) Op2);\r | |
3315 | }\r | |
3316 | }\r | |
3317 | \r | |
3318 | STATIC\r | |
3319 | UINT64\r | |
3320 | ExecuteASHR (\r | |
3321 | IN VM_CONTEXT *VmPtr,\r | |
3322 | IN UINT64 Op1,\r | |
3323 | IN UINT64 Op2\r | |
3324 | )\r | |
3325 | /*++\r | |
3326 | \r | |
3327 | Routine Description:\r | |
3328 | Execute the EBC ASHR instruction\r | |
3329 | \r | |
3330 | Arguments:\r | |
3331 | VmPtr - pointer to a VM context \r | |
3332 | Op1 - Operand 1 from the instruction \r | |
3333 | Op2 - Operand 2 from the instruction\r | |
3334 | \r | |
3335 | Returns:\r | |
3336 | Op1 >> Op2 (signed)\r | |
3337 | \r | |
3338 | Instruction syntax:\r | |
3339 | ASHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3340 | \r | |
3341 | --*/\r | |
3342 | {\r | |
3343 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3344 | return ARShiftU64 (Op1, (UINTN)Op2);\r |
878ddf1f | 3345 | } else {\r |
3346 | return (UINT64) ((INT64) ((INT32) Op1 >> (UINT32) Op2));\r | |
3347 | }\r | |
3348 | }\r | |
3349 | \r | |
3350 | STATIC\r | |
3351 | UINT64\r | |
3352 | ExecuteEXTNDB (\r | |
3353 | IN VM_CONTEXT *VmPtr,\r | |
3354 | IN UINT64 Op1,\r | |
3355 | IN UINT64 Op2\r | |
3356 | )\r | |
3357 | /*++\r | |
3358 | \r | |
3359 | Routine Description:\r | |
3360 | Execute the EBC EXTNDB instruction to sign-extend a byte value.\r | |
3361 | \r | |
3362 | Arguments:\r | |
3363 | VmPtr - pointer to a VM context \r | |
3364 | Op1 - Operand 1 from the instruction \r | |
3365 | Op2 - Operand 2 from the instruction\r | |
3366 | \r | |
3367 | Returns:\r | |
3368 | (INT64)(INT8)Op2\r | |
3369 | \r | |
3370 | Instruction syntax:\r | |
3371 | EXTNDB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3372 | \r | |
3373 | \r | |
3374 | --*/\r | |
3375 | {\r | |
3376 | INT8 Data8;\r | |
3377 | INT64 Data64;\r | |
3378 | //\r | |
3379 | // Convert to byte, then return as 64-bit signed value to let compiler\r | |
3380 | // sign-extend the value\r | |
3381 | //\r | |
3382 | Data8 = (INT8) Op2;\r | |
3383 | Data64 = (INT64) Data8;\r | |
3384 | \r | |
3385 | return (UINT64) Data64;\r | |
3386 | }\r | |
3387 | \r | |
3388 | STATIC\r | |
3389 | UINT64\r | |
3390 | ExecuteEXTNDW (\r | |
3391 | IN VM_CONTEXT *VmPtr,\r | |
3392 | IN UINT64 Op1,\r | |
3393 | IN UINT64 Op2\r | |
3394 | )\r | |
3395 | /*++\r | |
3396 | \r | |
3397 | Routine Description:\r | |
3398 | Execute the EBC EXTNDW instruction to sign-extend a 16-bit value.\r | |
3399 | \r | |
3400 | Arguments:\r | |
3401 | VmPtr - pointer to a VM context \r | |
3402 | Op1 - Operand 1 from the instruction \r | |
3403 | Op2 - Operand 2 from the instruction\r | |
3404 | \r | |
3405 | Returns:\r | |
3406 | (INT64)(INT16)Op2\r | |
3407 | \r | |
3408 | Instruction syntax:\r | |
3409 | EXTNDW[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3410 | \r | |
3411 | \r | |
3412 | --*/\r | |
3413 | {\r | |
3414 | INT16 Data16;\r | |
3415 | INT64 Data64;\r | |
3416 | //\r | |
3417 | // Convert to word, then return as 64-bit signed value to let compiler\r | |
3418 | // sign-extend the value\r | |
3419 | //\r | |
3420 | Data16 = (INT16) Op2;\r | |
3421 | Data64 = (INT64) Data16;\r | |
3422 | \r | |
3423 | return (UINT64) Data64;\r | |
3424 | }\r | |
3425 | //\r | |
3426 | // Execute the EBC EXTNDD instruction.\r | |
3427 | //\r | |
3428 | // Format: EXTNDD {@}Rx, {@}Ry [Index16|Immed16]\r | |
3429 | // EXTNDD Dest, Source\r | |
3430 | //\r | |
3431 | // Operation: Dest <- SignExtended((DWORD)Source))\r | |
3432 | //\r | |
3433 | STATIC\r | |
3434 | UINT64\r | |
3435 | ExecuteEXTNDD (\r | |
3436 | IN VM_CONTEXT *VmPtr,\r | |
3437 | IN UINT64 Op1,\r | |
3438 | IN UINT64 Op2\r | |
3439 | )\r | |
3440 | /*++\r | |
3441 | \r | |
3442 | Routine Description:\r | |
3443 | Execute the EBC EXTNDD instruction to sign-extend a 32-bit value.\r | |
3444 | \r | |
3445 | Arguments:\r | |
3446 | VmPtr - pointer to a VM context \r | |
3447 | Op1 - Operand 1 from the instruction \r | |
3448 | Op2 - Operand 2 from the instruction\r | |
3449 | \r | |
3450 | Returns:\r | |
3451 | (INT64)(INT32)Op2\r | |
3452 | \r | |
3453 | Instruction syntax:\r | |
3454 | EXTNDD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3455 | \r | |
3456 | \r | |
3457 | --*/\r | |
3458 | {\r | |
3459 | INT32 Data32;\r | |
3460 | INT64 Data64;\r | |
3461 | //\r | |
3462 | // Convert to 32-bit value, then return as 64-bit signed value to let compiler\r | |
3463 | // sign-extend the value\r | |
3464 | //\r | |
3465 | Data32 = (INT32) Op2;\r | |
3466 | Data64 = (INT64) Data32;\r | |
3467 | \r | |
3468 | return (UINT64) Data64;\r | |
3469 | }\r | |
3470 | \r | |
3471 | STATIC\r | |
3472 | EFI_STATUS\r | |
3473 | ExecuteSignedDataManip (\r | |
3474 | IN VM_CONTEXT *VmPtr\r | |
3475 | )\r | |
3476 | {\r | |
3477 | //\r | |
3478 | // Just call the data manipulation function with a flag indicating this\r | |
3479 | // is a signed operation.\r | |
3480 | //\r | |
3481 | return ExecuteDataManip (VmPtr, TRUE);\r | |
3482 | }\r | |
3483 | \r | |
3484 | STATIC\r | |
3485 | EFI_STATUS\r | |
3486 | ExecuteUnsignedDataManip (\r | |
3487 | IN VM_CONTEXT *VmPtr\r | |
3488 | )\r | |
3489 | {\r | |
3490 | //\r | |
3491 | // Just call the data manipulation function with a flag indicating this\r | |
3492 | // is not a signed operation.\r | |
3493 | //\r | |
3494 | return ExecuteDataManip (VmPtr, FALSE);\r | |
3495 | }\r | |
3496 | \r | |
3497 | STATIC\r | |
3498 | EFI_STATUS\r | |
3499 | ExecuteDataManip (\r | |
3500 | IN VM_CONTEXT *VmPtr,\r | |
3501 | IN BOOLEAN IsSignedOp\r | |
3502 | )\r | |
3503 | /*++\r | |
3504 | \r | |
3505 | Routine Description:\r | |
3506 | Execute all the EBC data manipulation instructions. \r | |
3507 | Since the EBC data manipulation instructions all have the same basic form, \r | |
3508 | they can share the code that does the fetch of operands and the write-back\r | |
3509 | of the result. This function performs the fetch of the operands (even if\r | |
3510 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
3511 | appropriate subfunction, then writes back the returned result.\r | |
3512 | \r | |
3513 | Arguments:\r | |
3514 | VmPtr - pointer to VM context\r | |
3515 | \r | |
3516 | Returns:\r | |
3517 | Standard EBC status\r | |
3518 | \r | |
3519 | Format: \r | |
3520 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
3521 | \r | |
3522 | --*/\r | |
3523 | {\r | |
3524 | UINT8 Opcode;\r | |
3525 | INT16 Index16;\r | |
3526 | UINT8 Operands;\r | |
3527 | UINT8 Size;\r | |
3528 | UINT64 Op1;\r | |
3529 | UINT64 Op2;\r | |
3530 | \r | |
3531 | //\r | |
3532 | // Get opcode and operands\r | |
3533 | //\r | |
3534 | Opcode = GETOPCODE (VmPtr);\r | |
3535 | Operands = GETOPERANDS (VmPtr);\r | |
3536 | \r | |
3537 | //\r | |
3538 | // Determine if we have immediate data by the opcode\r | |
3539 | //\r | |
3540 | if (Opcode & DATAMANIP_M_IMMDATA) {\r | |
3541 | //\r | |
3542 | // Index16 if Ry is indirect, or Immed16 if Ry direct.\r | |
3543 | //\r | |
3544 | if (OPERAND2_INDIRECT (Operands)) {\r | |
3545 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
3546 | } else {\r | |
3547 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
3548 | }\r | |
3549 | \r | |
3550 | Size = 4;\r | |
3551 | } else {\r | |
3552 | Index16 = 0;\r | |
3553 | Size = 2;\r | |
3554 | }\r | |
3555 | //\r | |
3556 | // Now get operand2 (source). It's of format {@}R2 {Index16|Immed16}\r | |
3557 | //\r | |
3558 | Op2 = (UINT64) VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16;\r | |
3559 | if (OPERAND2_INDIRECT (Operands)) {\r | |
3560 | //\r | |
3561 | // Indirect form: @R2 Index16. Fetch as 32- or 64-bit data\r | |
3562 | //\r | |
3563 | if (Opcode & DATAMANIP_M_64) {\r | |
3564 | Op2 = VmReadMem64 (VmPtr, (UINTN) Op2);\r | |
3565 | } else {\r | |
3566 | //\r | |
3567 | // Read as signed value where appropriate.\r | |
3568 | //\r | |
3569 | if (IsSignedOp) {\r | |
3570 | Op2 = (UINT64) (INT64) ((INT32) VmReadMem32 (VmPtr, (UINTN) Op2));\r | |
3571 | } else {\r | |
3572 | Op2 = (UINT64) VmReadMem32 (VmPtr, (UINTN) Op2);\r | |
3573 | }\r | |
3574 | }\r | |
3575 | } else {\r | |
3576 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
3577 | if (IsSignedOp) {\r | |
3578 | Op2 = (UINT64) (INT64) ((INT32) Op2);\r | |
3579 | } else {\r | |
3580 | Op2 = (UINT64) ((UINT32) Op2);\r | |
3581 | }\r | |
3582 | }\r | |
3583 | }\r | |
3584 | //\r | |
3585 | // Get operand1 (destination and sometimes also an actual operand)\r | |
3586 | // of form {@}R1\r | |
3587 | //\r | |
3588 | Op1 = VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
3589 | if (OPERAND1_INDIRECT (Operands)) {\r | |
3590 | if (Opcode & DATAMANIP_M_64) {\r | |
3591 | Op1 = VmReadMem64 (VmPtr, (UINTN) Op1);\r | |
3592 | } else {\r | |
3593 | if (IsSignedOp) {\r | |
3594 | Op1 = (UINT64) (INT64) ((INT32) VmReadMem32 (VmPtr, (UINTN) Op1));\r | |
3595 | } else {\r | |
3596 | Op1 = (UINT64) VmReadMem32 (VmPtr, (UINTN) Op1);\r | |
3597 | }\r | |
3598 | }\r | |
3599 | } else {\r | |
3600 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
3601 | if (IsSignedOp) {\r | |
3602 | Op1 = (UINT64) (INT64) ((INT32) Op1);\r | |
3603 | } else {\r | |
3604 | Op1 = (UINT64) ((UINT32) Op1);\r | |
3605 | }\r | |
3606 | }\r | |
3607 | }\r | |
3608 | //\r | |
3609 | // Dispatch to the computation function\r | |
3610 | //\r | |
3611 | if (((Opcode & OPCODE_M_OPCODE) - OPCODE_NOT) >=\r | |
3612 | (sizeof (mDataManipDispatchTable) / sizeof (mDataManipDispatchTable[0]))\r | |
3613 | ) {\r | |
3614 | EbcDebugSignalException (\r | |
3615 | EXCEPT_EBC_INVALID_OPCODE,\r | |
3616 | EXCEPTION_FLAG_ERROR,\r | |
3617 | VmPtr\r | |
3618 | );\r | |
3619 | //\r | |
3620 | // Advance and return\r | |
3621 | //\r | |
3622 | VmPtr->Ip += Size;\r | |
3623 | return EFI_UNSUPPORTED;\r | |
3624 | } else {\r | |
3625 | Op2 = mDataManipDispatchTable[(Opcode & OPCODE_M_OPCODE) - OPCODE_NOT](VmPtr, Op1, Op2);\r | |
3626 | }\r | |
3627 | //\r | |
3628 | // Write back the result.\r | |
3629 | //\r | |
3630 | if (OPERAND1_INDIRECT (Operands)) {\r | |
3631 | Op1 = VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
3632 | if (Opcode & DATAMANIP_M_64) {\r | |
3633 | VmWriteMem64 (VmPtr, (UINTN) Op1, Op2);\r | |
3634 | } else {\r | |
3635 | VmWriteMem32 (VmPtr, (UINTN) Op1, (UINT32) Op2);\r | |
3636 | }\r | |
3637 | } else {\r | |
3638 | //\r | |
3639 | // Storage back to a register. Write back, clearing upper bits (as per\r | |
3640 | // the specification) if 32-bit operation.\r | |
3641 | //\r | |
3642 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Op2;\r | |
3643 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
3644 | VmPtr->R[OPERAND1_REGNUM (Operands)] &= 0xFFFFFFFF;\r | |
3645 | }\r | |
3646 | }\r | |
3647 | //\r | |
3648 | // Advance the instruction pointer\r | |
3649 | //\r | |
3650 | VmPtr->Ip += Size;\r | |
3651 | return EFI_SUCCESS;\r | |
3652 | }\r | |
3653 | \r | |
3654 | STATIC\r | |
3655 | EFI_STATUS\r | |
3656 | ExecuteLOADSP (\r | |
3657 | IN VM_CONTEXT *VmPtr\r | |
3658 | )\r | |
3659 | /*++\r | |
3660 | \r | |
3661 | Routine Description:\r | |
3662 | Execute the EBC LOADSP instruction\r | |
3663 | \r | |
3664 | Arguments:\r | |
3665 | VmPtr - pointer to a VM context \r | |
3666 | \r | |
3667 | Returns:\r | |
3668 | Standard EFI_STATUS\r | |
3669 | \r | |
3670 | Instruction syntax:\r | |
3671 | LOADSP SP1, R2\r | |
3672 | \r | |
3673 | --*/\r | |
3674 | {\r | |
3675 | UINT8 Operands;\r | |
3676 | \r | |
3677 | //\r | |
3678 | // Get the operands\r | |
3679 | //\r | |
3680 | Operands = GETOPERANDS (VmPtr);\r | |
3681 | \r | |
3682 | //\r | |
3683 | // Do the operation\r | |
3684 | //\r | |
3685 | switch (OPERAND1_REGNUM (Operands)) {\r | |
3686 | //\r | |
3687 | // Set flags\r | |
3688 | //\r | |
3689 | case 0:\r | |
3690 | //\r | |
3691 | // Spec states that this instruction will not modify reserved bits in\r | |
3692 | // the flags register.\r | |
3693 | //\r | |
3694 | VmPtr->Flags = (VmPtr->Flags &~VMFLAGS_ALL_VALID) | (VmPtr->R[OPERAND2_REGNUM (Operands)] & VMFLAGS_ALL_VALID);\r | |
3695 | break;\r | |
3696 | \r | |
3697 | default:\r | |
3698 | EbcDebugSignalException (\r | |
3699 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
3700 | EXCEPTION_FLAG_WARNING,\r | |
3701 | VmPtr\r | |
3702 | );\r | |
3703 | VmPtr->Ip += 2;\r | |
3704 | return EFI_UNSUPPORTED;\r | |
3705 | }\r | |
3706 | \r | |
3707 | VmPtr->Ip += 2;\r | |
3708 | return EFI_SUCCESS;\r | |
3709 | }\r | |
3710 | \r | |
3711 | STATIC\r | |
3712 | EFI_STATUS\r | |
3713 | ExecuteSTORESP (\r | |
3714 | IN VM_CONTEXT *VmPtr\r | |
3715 | )\r | |
3716 | /*++\r | |
3717 | \r | |
3718 | Routine Description:\r | |
3719 | Execute the EBC STORESP instruction\r | |
3720 | \r | |
3721 | Arguments:\r | |
3722 | VmPtr - pointer to a VM context \r | |
3723 | \r | |
3724 | Returns:\r | |
3725 | Standard EFI_STATUS\r | |
3726 | \r | |
3727 | Instruction syntax:\r | |
3728 | STORESP Rx, FLAGS|IP\r | |
3729 | \r | |
3730 | --*/\r | |
3731 | {\r | |
3732 | UINT8 Operands;\r | |
3733 | \r | |
3734 | //\r | |
3735 | // Get the operands\r | |
3736 | //\r | |
3737 | Operands = GETOPERANDS (VmPtr);\r | |
3738 | \r | |
3739 | //\r | |
3740 | // Do the operation\r | |
3741 | //\r | |
3742 | switch (OPERAND2_REGNUM (Operands)) {\r | |
3743 | //\r | |
3744 | // Get flags\r | |
3745 | //\r | |
3746 | case 0:\r | |
3747 | //\r | |
3748 | // Retrieve the value in the flags register, then clear reserved bits\r | |
3749 | //\r | |
3750 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (UINT64) (VmPtr->Flags & VMFLAGS_ALL_VALID);\r | |
3751 | break;\r | |
3752 | \r | |
3753 | //\r | |
3754 | // Get IP -- address of following instruction\r | |
3755 | //\r | |
3756 | case 1:\r | |
3757 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (UINT64) (UINTN) VmPtr->Ip + 2;\r | |
3758 | break;\r | |
3759 | \r | |
3760 | default:\r | |
3761 | EbcDebugSignalException (\r | |
3762 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
3763 | EXCEPTION_FLAG_WARNING,\r | |
3764 | VmPtr\r | |
3765 | );\r | |
3766 | VmPtr->Ip += 2;\r | |
3767 | return EFI_UNSUPPORTED;\r | |
3768 | break;\r | |
3769 | }\r | |
3770 | \r | |
3771 | VmPtr->Ip += 2;\r | |
3772 | return EFI_SUCCESS;\r | |
3773 | }\r | |
3774 | \r | |
3775 | STATIC\r | |
3776 | INT16\r | |
3777 | VmReadIndex16 (\r | |
3778 | IN VM_CONTEXT *VmPtr,\r | |
3779 | IN UINT32 CodeOffset\r | |
3780 | )\r | |
3781 | /*++\r | |
3782 | \r | |
3783 | Routine Description:\r | |
3784 | Decode a 16-bit index to determine the offset. Given an index value:\r | |
3785 | \r | |
3786 | b15 - sign bit\r | |
3787 | b14:12 - number of bits in this index assigned to natural units (=a)\r | |
3788 | ba:11 - constant units = C\r | |
3789 | b0:a - natural units = N\r | |
3790 | \r | |
3791 | Given this info, the offset can be computed by:\r | |
3792 | offset = sign_bit * (C + N * sizeof(UINTN))\r | |
3793 | \r | |
3794 | Max offset is achieved with index = 0x7FFF giving an offset of\r | |
3795 | 0x27B (32-bit machine) or 0x477 (64-bit machine).\r | |
3796 | Min offset is achieved with index = \r | |
3797 | \r | |
3798 | Arguments:\r | |
3799 | VmPtr - pointer to VM context\r | |
3800 | CodeOffset - offset from IP of the location of the 16-bit index to decode\r | |
3801 | \r | |
3802 | Returns:\r | |
3803 | The decoded offset.\r | |
3804 | \r | |
3805 | --*/\r | |
3806 | {\r | |
3807 | UINT16 Index;\r | |
3808 | INT16 Offset;\r | |
3809 | INT16 C;\r | |
3810 | INT16 N;\r | |
3811 | INT16 NBits;\r | |
3812 | INT16 Mask;\r | |
3813 | \r | |
3814 | //\r | |
3815 | // First read the index from the code stream\r | |
3816 | //\r | |
3817 | Index = VmReadCode16 (VmPtr, CodeOffset);\r | |
3818 | \r | |
3819 | //\r | |
3820 | // Get the mask for N. First get the number of bits from the index.\r | |
3821 | //\r | |
3822 | NBits = (INT16) ((Index & 0x7000) >> 12);\r | |
3823 | \r | |
3824 | //\r | |
3825 | // Scale it for 16-bit indexes\r | |
3826 | //\r | |
3827 | NBits *= 2;\r | |
3828 | \r | |
3829 | //\r | |
3830 | // Now using the number of bits, create a mask.\r | |
3831 | //\r | |
3832 | Mask = (INT16) ((INT16)~0 << NBits);\r | |
3833 | \r | |
3834 | //\r | |
3835 | // Now using the mask, extract N from the lower bits of the index.\r | |
3836 | //\r | |
3837 | N = (INT16) (Index &~Mask);\r | |
3838 | \r | |
3839 | //\r | |
3840 | // Now compute C\r | |
3841 | //\r | |
3842 | C = (INT16) (((Index &~0xF000) & Mask) >> NBits);\r | |
3843 | \r | |
3844 | Offset = (INT16) (N * sizeof (UINTN) + C);\r | |
3845 | \r | |
3846 | //\r | |
3847 | // Now set the sign\r | |
3848 | //\r | |
3849 | if (Index & 0x8000) {\r | |
3850 | //\r | |
3851 | // Do it the hard way to work around a bogus compiler warning\r | |
3852 | //\r | |
3853 | // Offset = -1 * Offset;\r | |
3854 | //\r | |
3855 | Offset = (INT16) ((INT32) Offset * -1);\r | |
3856 | }\r | |
3857 | \r | |
3858 | return Offset;\r | |
3859 | }\r | |
3860 | \r | |
3861 | STATIC\r | |
3862 | INT32\r | |
3863 | VmReadIndex32 (\r | |
3864 | IN VM_CONTEXT *VmPtr,\r | |
3865 | IN UINT32 CodeOffset\r | |
3866 | )\r | |
3867 | /*++\r | |
3868 | \r | |
3869 | Routine Description:\r | |
3870 | Decode a 32-bit index to determine the offset.\r | |
3871 | \r | |
3872 | Arguments:\r | |
3873 | VmPtr - pointer to VM context\r | |
3874 | CodeOffset - offset from IP of the location of the 32-bit index to decode\r | |
3875 | \r | |
3876 | Returns:\r | |
3877 | Converted index per EBC VM specification\r | |
3878 | \r | |
3879 | --*/\r | |
3880 | {\r | |
3881 | UINT32 Index;\r | |
3882 | INT32 Offset;\r | |
3883 | INT32 C;\r | |
3884 | INT32 N;\r | |
3885 | INT32 NBits;\r | |
3886 | INT32 Mask;\r | |
3887 | \r | |
3888 | Index = VmReadImmed32 (VmPtr, CodeOffset);\r | |
3889 | \r | |
3890 | //\r | |
3891 | // Get the mask for N. First get the number of bits from the index.\r | |
3892 | //\r | |
3893 | NBits = (Index & 0x70000000) >> 28;\r | |
3894 | \r | |
3895 | //\r | |
3896 | // Scale it for 32-bit indexes\r | |
3897 | //\r | |
3898 | NBits *= 4;\r | |
3899 | \r | |
3900 | //\r | |
3901 | // Now using the number of bits, create a mask.\r | |
3902 | //\r | |
3903 | Mask = (INT32)~0 << NBits;\r | |
3904 | \r | |
3905 | //\r | |
3906 | // Now using the mask, extract N from the lower bits of the index.\r | |
3907 | //\r | |
3908 | N = Index &~Mask;\r | |
3909 | \r | |
3910 | //\r | |
3911 | // Now compute C\r | |
3912 | //\r | |
3913 | C = ((Index &~0xF0000000) & Mask) >> NBits;\r | |
3914 | \r | |
3915 | Offset = N * sizeof (UINTN) + C;\r | |
3916 | \r | |
3917 | //\r | |
3918 | // Now set the sign\r | |
3919 | //\r | |
3920 | if (Index & 0x80000000) {\r | |
3921 | Offset = Offset * -1;\r | |
3922 | }\r | |
3923 | \r | |
3924 | return Offset;\r | |
3925 | }\r | |
3926 | \r | |
3927 | STATIC\r | |
3928 | INT64\r | |
3929 | VmReadIndex64 (\r | |
3930 | IN VM_CONTEXT *VmPtr,\r | |
3931 | IN UINT32 CodeOffset\r | |
3932 | )\r | |
3933 | /*++\r | |
3934 | \r | |
3935 | Routine Description:\r | |
3936 | Decode a 64-bit index to determine the offset.\r | |
3937 | \r | |
3938 | Arguments:\r | |
3939 | VmPtr - pointer to VM context\r | |
3940 | CodeOffset - offset from IP of the location of the 64-bit index to decode\r | |
3941 | \r | |
3942 | Returns:\r | |
3943 | Converted index per EBC VM specification\r | |
3944 | \r | |
3945 | --*/\r | |
3946 | {\r | |
3947 | UINT64 Index;\r | |
878ddf1f | 3948 | INT64 Offset;\r |
3949 | INT64 C;\r | |
3950 | INT64 N;\r | |
3951 | INT64 NBits;\r | |
3952 | INT64 Mask;\r | |
3953 | \r | |
3954 | Index = VmReadCode64 (VmPtr, CodeOffset);\r | |
3955 | \r | |
3956 | //\r | |
3957 | // Get the mask for N. First get the number of bits from the index.\r | |
3958 | //\r | |
6d7338ae | 3959 | NBits = RShiftU64 ((Index & 0x7000000000000000ULL), 60);\r |
878ddf1f | 3960 | \r |
3961 | //\r | |
3962 | // Scale it for 64-bit indexes (multiply by 8 by shifting left 3)\r | |
3963 | //\r | |
6d7338ae | 3964 | NBits = LShiftU64 ((UINT64)NBits, 3);\r |
878ddf1f | 3965 | \r |
3966 | //\r | |
3967 | // Now using the number of bits, create a mask.\r | |
3968 | //\r | |
6d7338ae | 3969 | Mask = (LShiftU64 ((UINT64)~0, (UINTN)NBits));\r |
878ddf1f | 3970 | \r |
3971 | //\r | |
3972 | // Now using the mask, extract N from the lower bits of the index.\r | |
3973 | //\r | |
3974 | N = Index &~Mask;\r | |
3975 | \r | |
3976 | //\r | |
3977 | // Now compute C\r | |
3978 | //\r | |
6d7338ae | 3979 | C = ARShiftU64 (((Index &~0xF000000000000000ULL) & Mask), (UINTN)NBits);\r |
878ddf1f | 3980 | \r |
6d7338ae | 3981 | Offset = MultU64x64 (N, sizeof (UINTN)) + C;\r |
878ddf1f | 3982 | \r |
3983 | //\r | |
3984 | // Now set the sign\r | |
3985 | //\r | |
3986 | if (Index & 0x8000000000000000ULL) {\r | |
6d7338ae | 3987 | Offset = MultS64x64 (Offset, -1);\r |
878ddf1f | 3988 | }\r |
3989 | \r | |
3990 | return Offset;\r | |
3991 | }\r | |
3992 | \r | |
3993 | STATIC\r | |
3994 | EFI_STATUS\r | |
3995 | VmWriteMem8 (\r | |
3996 | IN VM_CONTEXT *VmPtr,\r | |
3997 | IN UINTN Addr,\r | |
3998 | IN UINT8 Data\r | |
3999 | )\r | |
4000 | /*++\r | |
4001 | \r | |
4002 | Routine Description:\r | |
4003 | The following VmWriteMem? routines are called by the EBC data\r | |
4004 | movement instructions that write to memory. Since these writes\r | |
4005 | may be to the stack, which looks like (high address on top) this,\r | |
4006 | \r | |
4007 | [EBC entry point arguments]\r | |
4008 | [VM stack]\r | |
4009 | [EBC stack]\r | |
4010 | \r | |
4011 | we need to detect all attempts to write to the EBC entry point argument\r | |
4012 | stack area and adjust the address (which will initially point into the \r | |
4013 | VM stack) to point into the EBC entry point arguments.\r | |
4014 | \r | |
4015 | Arguments:\r | |
4016 | VmPtr - pointer to a VM context \r | |
4017 | Addr - adddress to write to\r | |
4018 | Data - value to write to Addr\r | |
4019 | \r | |
4020 | Returns:\r | |
4021 | Standard EFI_STATUS\r | |
4022 | \r | |
4023 | --*/\r | |
4024 | {\r | |
4025 | //\r | |
4026 | // Convert the address if it's in the stack gap\r | |
4027 | //\r | |
4028 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4029 | *(UINT8 *) Addr = Data;\r | |
4030 | return EFI_SUCCESS;\r | |
4031 | }\r | |
4032 | \r | |
4033 | STATIC\r | |
4034 | EFI_STATUS\r | |
4035 | VmWriteMem16 (\r | |
4036 | IN VM_CONTEXT *VmPtr,\r | |
4037 | IN UINTN Addr,\r | |
4038 | IN UINT16 Data\r | |
4039 | )\r | |
4040 | {\r | |
4041 | EFI_STATUS Status;\r | |
4042 | \r | |
4043 | //\r | |
4044 | // Convert the address if it's in the stack gap\r | |
4045 | //\r | |
4046 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4047 | \r | |
4048 | //\r | |
4049 | // Do a simple write if aligned\r | |
4050 | //\r | |
4051 | if (IS_ALIGNED (Addr, sizeof (UINT16))) {\r | |
4052 | *(UINT16 *) Addr = Data;\r | |
4053 | } else {\r | |
4054 | //\r | |
4055 | // Write as two bytes\r | |
4056 | //\r | |
4057 | MemoryFence ();\r | |
4058 | if ((Status = VmWriteMem8 (VmPtr, Addr, (UINT8) Data)) != EFI_SUCCESS) {\r | |
4059 | return Status;\r | |
4060 | }\r | |
4061 | \r | |
4062 | MemoryFence ();\r | |
4063 | if ((Status = VmWriteMem8 (VmPtr, Addr + 1, (UINT8) (Data >> 8))) != EFI_SUCCESS) {\r | |
4064 | return Status;\r | |
4065 | }\r | |
4066 | \r | |
4067 | MemoryFence ();\r | |
4068 | }\r | |
4069 | \r | |
4070 | return EFI_SUCCESS;\r | |
4071 | }\r | |
4072 | \r | |
4073 | STATIC\r | |
4074 | EFI_STATUS\r | |
4075 | VmWriteMem32 (\r | |
4076 | IN VM_CONTEXT *VmPtr,\r | |
4077 | IN UINTN Addr,\r | |
4078 | IN UINT32 Data\r | |
4079 | )\r | |
4080 | {\r | |
4081 | EFI_STATUS Status;\r | |
4082 | \r | |
4083 | //\r | |
4084 | // Convert the address if it's in the stack gap\r | |
4085 | //\r | |
4086 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4087 | \r | |
4088 | //\r | |
4089 | // Do a simple write if aligned\r | |
4090 | //\r | |
4091 | if (IS_ALIGNED (Addr, sizeof (UINT32))) {\r | |
4092 | *(UINT32 *) Addr = Data;\r | |
4093 | } else {\r | |
4094 | //\r | |
4095 | // Write as two words\r | |
4096 | //\r | |
4097 | MemoryFence ();\r | |
4098 | if ((Status = VmWriteMem16 (VmPtr, Addr, (UINT16) Data)) != EFI_SUCCESS) {\r | |
4099 | return Status;\r | |
4100 | }\r | |
4101 | \r | |
4102 | MemoryFence ();\r | |
4103 | if ((Status = VmWriteMem16 (VmPtr, Addr + sizeof (UINT16), (UINT16) (Data >> 16))) != EFI_SUCCESS) {\r | |
4104 | return Status;\r | |
4105 | }\r | |
4106 | \r | |
4107 | MemoryFence ();\r | |
4108 | }\r | |
4109 | \r | |
4110 | return EFI_SUCCESS;\r | |
4111 | }\r | |
4112 | \r | |
4113 | EFI_STATUS\r | |
4114 | VmWriteMem64 (\r | |
4115 | IN VM_CONTEXT *VmPtr,\r | |
4116 | IN UINTN Addr,\r | |
4117 | IN UINT64 Data\r | |
4118 | )\r | |
4119 | {\r | |
4120 | EFI_STATUS Status;\r | |
4121 | UINT32 Data32;\r | |
4122 | \r | |
4123 | //\r | |
4124 | // Convert the address if it's in the stack gap\r | |
4125 | //\r | |
4126 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4127 | \r | |
4128 | //\r | |
4129 | // Do a simple write if aligned\r | |
4130 | //\r | |
4131 | if (IS_ALIGNED (Addr, sizeof (UINT64))) {\r | |
4132 | *(UINT64 *) Addr = Data;\r | |
4133 | } else {\r | |
4134 | //\r | |
4135 | // Write as two 32-bit words\r | |
4136 | //\r | |
4137 | MemoryFence ();\r | |
4138 | if ((Status = VmWriteMem32 (VmPtr, Addr, (UINT32) Data)) != EFI_SUCCESS) {\r | |
4139 | return Status;\r | |
4140 | }\r | |
4141 | \r | |
4142 | MemoryFence ();\r | |
4143 | Data32 = (UINT32) (((UINT32 *) &Data)[1]);\r | |
4144 | if ((Status = VmWriteMem32 (VmPtr, Addr + sizeof (UINT32), Data32)) != EFI_SUCCESS) {\r | |
4145 | return Status;\r | |
4146 | }\r | |
4147 | \r | |
4148 | MemoryFence ();\r | |
4149 | }\r | |
4150 | \r | |
4151 | return EFI_SUCCESS;\r | |
4152 | }\r | |
4153 | \r | |
4154 | EFI_STATUS\r | |
4155 | VmWriteMemN (\r | |
4156 | IN VM_CONTEXT *VmPtr,\r | |
4157 | IN UINTN Addr,\r | |
4158 | IN UINTN Data\r | |
4159 | )\r | |
4160 | {\r | |
4161 | EFI_STATUS Status;\r | |
4162 | UINTN Index;\r | |
4163 | \r | |
4164 | Status = EFI_SUCCESS;\r | |
4165 | \r | |
4166 | //\r | |
4167 | // Convert the address if it's in the stack gap\r | |
4168 | //\r | |
4169 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4170 | \r | |
4171 | //\r | |
4172 | // Do a simple write if aligned\r | |
4173 | //\r | |
4174 | if (IS_ALIGNED (Addr, sizeof (UINTN))) {\r | |
4175 | *(UINTN *) Addr = Data;\r | |
4176 | } else {\r | |
4177 | for (Index = 0; Index < sizeof (UINTN) / sizeof (UINT32); Index++) {\r | |
4178 | MemoryFence ();\r | |
4179 | Status = VmWriteMem32 (VmPtr, Addr + Index * sizeof (UINT32), (UINT32) Data);\r | |
4180 | MemoryFence ();\r | |
4181 | Data = (UINTN)RShiftU64 ((UINT64)Data, 32);\r | |
4182 | }\r | |
4183 | }\r | |
4184 | \r | |
4185 | return Status;\r | |
4186 | }\r | |
4187 | \r | |
4188 | STATIC\r | |
4189 | INT8\r | |
4190 | VmReadImmed8 (\r | |
4191 | IN VM_CONTEXT *VmPtr,\r | |
4192 | IN UINT32 Offset\r | |
4193 | )\r | |
4194 | /*++\r | |
4195 | \r | |
4196 | Routine Description:\r | |
4197 | \r | |
4198 | The following VmReadImmed routines are called by the EBC execute\r | |
4199 | functions to read EBC immediate values from the code stream.\r | |
4200 | Since we can't assume alignment, each tries to read in the biggest \r | |
4201 | chunks size available, but will revert to smaller reads if necessary.\r | |
4202 | \r | |
4203 | Arguments:\r | |
4204 | VmPtr - pointer to a VM context \r | |
4205 | Offset - offset from IP of the code bytes to read.\r | |
4206 | \r | |
4207 | Returns:\r | |
4208 | Signed data of the requested size from the specified address.\r | |
4209 | \r | |
4210 | --*/\r | |
4211 | {\r | |
4212 | //\r | |
4213 | // Simply return the data in flat memory space\r | |
4214 | //\r | |
4215 | return * (INT8 *) (VmPtr->Ip + Offset);\r | |
4216 | }\r | |
4217 | \r | |
4218 | STATIC\r | |
4219 | INT16\r | |
4220 | VmReadImmed16 (\r | |
4221 | IN VM_CONTEXT *VmPtr,\r | |
4222 | IN UINT32 Offset\r | |
4223 | )\r | |
4224 | {\r | |
4225 | //\r | |
4226 | // Read direct if aligned\r | |
4227 | //\r | |
4228 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (INT16))) {\r | |
4229 | return * (INT16 *) (VmPtr->Ip + Offset);\r | |
4230 | } else {\r | |
4231 | //\r | |
4232 | // All code word reads should be aligned\r | |
4233 | //\r | |
4234 | EbcDebugSignalException (\r | |
4235 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
4236 | EXCEPTION_FLAG_WARNING,\r | |
4237 | VmPtr\r | |
4238 | );\r | |
4239 | }\r | |
4240 | //\r | |
4241 | // Return unaligned data\r | |
4242 | //\r | |
4243 | return (INT16) (*(UINT8 *) (VmPtr->Ip + Offset) + (*(UINT8 *) (VmPtr->Ip + Offset + 1) << 8));\r | |
4244 | }\r | |
4245 | \r | |
4246 | STATIC\r | |
4247 | INT32\r | |
4248 | VmReadImmed32 (\r | |
4249 | IN VM_CONTEXT *VmPtr,\r | |
4250 | IN UINT32 Offset\r | |
4251 | )\r | |
4252 | {\r | |
4253 | UINT32 Data;\r | |
4254 | \r | |
4255 | //\r | |
4256 | // Read direct if aligned\r | |
4257 | //\r | |
4258 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT32))) {\r | |
4259 | return * (INT32 *) (VmPtr->Ip + Offset);\r | |
4260 | }\r | |
4261 | //\r | |
4262 | // Return unaligned data\r | |
4263 | //\r | |
4264 | Data = (UINT32) VmReadCode16 (VmPtr, Offset);\r | |
4265 | Data |= (UINT32) (VmReadCode16 (VmPtr, Offset + 2) << 16);\r | |
4266 | return Data;\r | |
4267 | }\r | |
4268 | \r | |
4269 | STATIC\r | |
4270 | INT64\r | |
4271 | VmReadImmed64 (\r | |
4272 | IN VM_CONTEXT *VmPtr,\r | |
4273 | IN UINT32 Offset\r | |
4274 | )\r | |
4275 | {\r | |
4276 | UINT64 Data64;\r | |
4277 | UINT32 Data32;\r | |
4278 | UINT8 *Ptr;\r | |
4279 | \r | |
4280 | //\r | |
4281 | // Read direct if aligned\r | |
4282 | //\r | |
4283 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT64))) {\r | |
4284 | return * (UINT64 *) (VmPtr->Ip + Offset);\r | |
4285 | }\r | |
4286 | //\r | |
4287 | // Return unaligned data.\r | |
4288 | //\r | |
4289 | Ptr = (UINT8 *) &Data64;\r | |
4290 | Data32 = VmReadCode32 (VmPtr, Offset);\r | |
4291 | *(UINT32 *) Ptr = Data32;\r | |
4292 | Ptr += sizeof (Data32);\r | |
4293 | Data32 = VmReadCode32 (VmPtr, Offset + sizeof (UINT32));\r | |
4294 | *(UINT32 *) Ptr = Data32;\r | |
4295 | return Data64;\r | |
4296 | }\r | |
4297 | \r | |
4298 | STATIC\r | |
4299 | UINT16\r | |
4300 | VmReadCode16 (\r | |
4301 | IN VM_CONTEXT *VmPtr,\r | |
4302 | IN UINT32 Offset\r | |
4303 | )\r | |
4304 | /*++\r | |
4305 | \r | |
4306 | Routine Description:\r | |
4307 | The following VmReadCode() routines provide the ability to read raw \r | |
4308 | unsigned data from the code stream. \r | |
4309 | \r | |
4310 | Arguments:\r | |
4311 | VmPtr - pointer to VM context\r | |
4312 | Offset - offset from current IP to the raw data to read.\r | |
4313 | \r | |
4314 | Returns:\r | |
4315 | The raw unsigned 16-bit value from the code stream.\r | |
4316 | \r | |
4317 | --*/\r | |
4318 | {\r | |
4319 | //\r | |
4320 | // Read direct if aligned\r | |
4321 | //\r | |
4322 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT16))) {\r | |
4323 | return * (UINT16 *) (VmPtr->Ip + Offset);\r | |
4324 | } else {\r | |
4325 | //\r | |
4326 | // All code word reads should be aligned\r | |
4327 | //\r | |
4328 | EbcDebugSignalException (\r | |
4329 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
4330 | EXCEPTION_FLAG_WARNING,\r | |
4331 | VmPtr\r | |
4332 | );\r | |
4333 | }\r | |
4334 | //\r | |
4335 | // Return unaligned data\r | |
4336 | //\r | |
4337 | return (UINT16) (*(UINT8 *) (VmPtr->Ip + Offset) + (*(UINT8 *) (VmPtr->Ip + Offset + 1) << 8));\r | |
4338 | }\r | |
4339 | \r | |
4340 | STATIC\r | |
4341 | UINT32\r | |
4342 | VmReadCode32 (\r | |
4343 | IN VM_CONTEXT *VmPtr,\r | |
4344 | IN UINT32 Offset\r | |
4345 | )\r | |
4346 | {\r | |
4347 | UINT32 Data;\r | |
4348 | //\r | |
4349 | // Read direct if aligned\r | |
4350 | //\r | |
4351 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT32))) {\r | |
4352 | return * (UINT32 *) (VmPtr->Ip + Offset);\r | |
4353 | }\r | |
4354 | //\r | |
4355 | // Return unaligned data\r | |
4356 | //\r | |
4357 | Data = (UINT32) VmReadCode16 (VmPtr, Offset);\r | |
4358 | Data |= (VmReadCode16 (VmPtr, Offset + 2) << 16);\r | |
4359 | return Data;\r | |
4360 | }\r | |
4361 | \r | |
4362 | STATIC\r | |
4363 | UINT64\r | |
4364 | VmReadCode64 (\r | |
4365 | IN VM_CONTEXT *VmPtr,\r | |
4366 | IN UINT32 Offset\r | |
4367 | )\r | |
4368 | {\r | |
4369 | UINT64 Data64;\r | |
4370 | UINT32 Data32;\r | |
4371 | UINT8 *Ptr;\r | |
4372 | \r | |
4373 | //\r | |
4374 | // Read direct if aligned\r | |
4375 | //\r | |
4376 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT64))) {\r | |
4377 | return * (UINT64 *) (VmPtr->Ip + Offset);\r | |
4378 | }\r | |
4379 | //\r | |
4380 | // Return unaligned data.\r | |
4381 | //\r | |
4382 | Ptr = (UINT8 *) &Data64;\r | |
4383 | Data32 = VmReadCode32 (VmPtr, Offset);\r | |
4384 | *(UINT32 *) Ptr = Data32;\r | |
4385 | Ptr += sizeof (Data32);\r | |
4386 | Data32 = VmReadCode32 (VmPtr, Offset + sizeof (UINT32));\r | |
4387 | *(UINT32 *) Ptr = Data32;\r | |
4388 | return Data64;\r | |
4389 | }\r | |
4390 | \r | |
4391 | STATIC\r | |
4392 | UINT8\r | |
4393 | VmReadMem8 (\r | |
4394 | IN VM_CONTEXT *VmPtr,\r | |
4395 | IN UINTN Addr\r | |
4396 | )\r | |
4397 | {\r | |
4398 | //\r | |
4399 | // Convert the address if it's in the stack gap\r | |
4400 | //\r | |
4401 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4402 | //\r | |
4403 | // Simply return the data in flat memory space\r | |
4404 | //\r | |
4405 | return * (UINT8 *) Addr;\r | |
4406 | }\r | |
4407 | \r | |
4408 | STATIC\r | |
4409 | UINT16\r | |
4410 | VmReadMem16 (\r | |
4411 | IN VM_CONTEXT *VmPtr,\r | |
4412 | IN UINTN Addr\r | |
4413 | )\r | |
4414 | {\r | |
4415 | //\r | |
4416 | // Convert the address if it's in the stack gap\r | |
4417 | //\r | |
4418 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4419 | //\r | |
4420 | // Read direct if aligned\r | |
4421 | //\r | |
4422 | if (IS_ALIGNED (Addr, sizeof (UINT16))) {\r | |
4423 | return * (UINT16 *) Addr;\r | |
4424 | }\r | |
4425 | //\r | |
4426 | // Return unaligned data\r | |
4427 | //\r | |
4428 | return (UINT16) (*(UINT8 *) Addr + (*(UINT8 *) (Addr + 1) << 8));\r | |
4429 | }\r | |
4430 | \r | |
4431 | STATIC\r | |
4432 | UINT32\r | |
4433 | VmReadMem32 (\r | |
4434 | IN VM_CONTEXT *VmPtr,\r | |
4435 | IN UINTN Addr\r | |
4436 | )\r | |
4437 | {\r | |
4438 | UINT32 Data;\r | |
4439 | \r | |
4440 | //\r | |
4441 | // Convert the address if it's in the stack gap\r | |
4442 | //\r | |
4443 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4444 | //\r | |
4445 | // Read direct if aligned\r | |
4446 | //\r | |
4447 | if (IS_ALIGNED (Addr, sizeof (UINT32))) {\r | |
4448 | return * (UINT32 *) Addr;\r | |
4449 | }\r | |
4450 | //\r | |
4451 | // Return unaligned data\r | |
4452 | //\r | |
4453 | Data = (UINT32) VmReadMem16 (VmPtr, Addr);\r | |
4454 | Data |= (VmReadMem16 (VmPtr, Addr + 2) << 16);\r | |
4455 | return Data;\r | |
4456 | }\r | |
4457 | \r | |
4458 | STATIC\r | |
4459 | UINT64\r | |
4460 | VmReadMem64 (\r | |
4461 | IN VM_CONTEXT *VmPtr,\r | |
4462 | IN UINTN Addr\r | |
4463 | )\r | |
4464 | {\r | |
4465 | UINT64 Data;\r | |
4466 | UINT32 Data32;\r | |
4467 | \r | |
4468 | //\r | |
4469 | // Convert the address if it's in the stack gap\r | |
4470 | //\r | |
4471 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4472 | \r | |
4473 | //\r | |
4474 | // Read direct if aligned\r | |
4475 | //\r | |
4476 | if (IS_ALIGNED (Addr, sizeof (UINT64))) {\r | |
4477 | return * (UINT64 *) Addr;\r | |
4478 | }\r | |
4479 | //\r | |
4480 | // Return unaligned data. Assume little endian.\r | |
4481 | //\r | |
4482 | Data = (UINT64) VmReadMem32 (VmPtr, Addr);\r | |
4483 | Data32 = VmReadMem32 (VmPtr, Addr + sizeof (UINT32));\r | |
4484 | *(UINT32 *) ((UINT32 *) &Data + 1) = Data32;\r | |
4485 | return Data;\r | |
4486 | }\r | |
4487 | \r | |
4488 | STATIC\r | |
4489 | UINTN\r | |
4490 | ConvertStackAddr (\r | |
4491 | IN VM_CONTEXT *VmPtr,\r | |
4492 | IN UINTN Addr\r | |
4493 | )\r | |
4494 | /*++\r | |
4495 | \r | |
4496 | Routine Description:\r | |
4497 | \r | |
4498 | Given an address that EBC is going to read from or write to, return\r | |
4499 | an appropriate address that accounts for a gap in the stack.\r | |
4500 | \r | |
4501 | The stack for this application looks like this (high addr on top)\r | |
4502 | [EBC entry point arguments]\r | |
4503 | [VM stack]\r | |
4504 | [EBC stack]\r | |
4505 | \r | |
4506 | The EBC assumes that its arguments are at the top of its stack, which\r | |
4507 | is where the VM stack is really. Therefore if the EBC does memory\r | |
4508 | accesses into the VM stack area, then we need to convert the address\r | |
4509 | to point to the EBC entry point arguments area. Do this here.\r | |
4510 | \r | |
4511 | Arguments:\r | |
4512 | \r | |
4513 | VmPtr - pointer to VM context\r | |
4514 | Addr - address of interest\r | |
4515 | \r | |
4516 | Returns:\r | |
4517 | \r | |
4518 | The unchanged address if it's not in the VM stack region. Otherwise, \r | |
4519 | adjust for the stack gap and return the modified address.\r | |
4520 | \r | |
4521 | --*/\r | |
4522 | {\r | |
4523 | if ((Addr >= VmPtr->LowStackTop) && (Addr < VmPtr->HighStackBottom)) {\r | |
4524 | //\r | |
4525 | // In the stack gap -- now make sure it's not in the VM itself, which\r | |
4526 | // would be the case if it's accessing VM register contents.\r | |
4527 | //\r | |
4528 | if ((Addr < (UINTN) VmPtr) || (Addr > (UINTN) VmPtr + sizeof (VM_CONTEXT))) {\r | |
4529 | VmPtr->LastAddrConverted = Addr;\r | |
4530 | VmPtr->LastAddrConvertedValue = Addr - VmPtr->LowStackTop + VmPtr->HighStackBottom;\r | |
4531 | return Addr - VmPtr->LowStackTop + VmPtr->HighStackBottom;\r | |
4532 | }\r | |
4533 | }\r | |
4534 | \r | |
4535 | return Addr;\r | |
4536 | }\r | |
4537 | \r | |
4538 | STATIC\r | |
4539 | UINTN\r | |
4540 | VmReadMemN (\r | |
4541 | IN VM_CONTEXT *VmPtr,\r | |
4542 | IN UINTN Addr\r | |
4543 | )\r | |
4544 | /*++\r | |
4545 | \r | |
4546 | Routine Description:\r | |
4547 | Read a natural value from memory. May or may not be aligned.\r | |
4548 | \r | |
4549 | Arguments:\r | |
4550 | VmPtr - current VM context\r | |
4551 | Addr - the address to read from\r | |
4552 | \r | |
4553 | Returns:\r | |
4554 | The natural value at address Addr.\r | |
4555 | \r | |
4556 | --*/\r | |
4557 | {\r | |
4558 | UINTN Data;\r | |
4559 | UINT32 Size;\r | |
4560 | UINT8 *FromPtr;\r | |
4561 | UINT8 *ToPtr;\r | |
4562 | //\r | |
4563 | // Convert the address if it's in the stack gap\r | |
4564 | //\r | |
4565 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4566 | //\r | |
4567 | // Read direct if aligned\r | |
4568 | //\r | |
4569 | if (IS_ALIGNED (Addr, sizeof (UINTN))) {\r | |
4570 | return * (UINTN *) Addr;\r | |
4571 | }\r | |
4572 | //\r | |
4573 | // Return unaligned data\r | |
4574 | //\r | |
4575 | Data = 0;\r | |
4576 | FromPtr = (UINT8 *) Addr;\r | |
4577 | ToPtr = (UINT8 *) &Data;\r | |
4578 | \r | |
4579 | for (Size = 0; Size < sizeof (Data); Size++) {\r | |
4580 | *ToPtr = *FromPtr;\r | |
4581 | ToPtr++;\r | |
4582 | FromPtr++;\r | |
4583 | }\r | |
4584 | \r | |
4585 | return Data;\r | |
4586 | }\r | |
4587 | \r | |
4588 | UINT64\r | |
4589 | GetVmVersion (\r | |
4590 | VOID\r | |
4591 | )\r | |
4592 | {\r | |
4593 | return (UINT64) (((VM_MAJOR_VERSION & 0xFFFF) << 16) | ((VM_MINOR_VERSION & 0xFFFF)));\r | |
4594 | }\r |