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