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878ddf1f | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | EbcExecute.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | Contains code that implements the virtual machine.\r | |
19 | \r | |
20 | --*/\r | |
21 | \r | |
22 | #include "EbcInt.h"\r | |
23 | #include "EbcExecute.h"\r | |
24 | \r | |
25 | //\r | |
26 | // VM major/minor version\r | |
27 | //\r | |
28 | #define VM_MAJOR_VERSION 1\r | |
29 | #define VM_MINOR_VERSION 0\r | |
30 | \r | |
31 | //\r | |
32 | // Define some useful data size constants to allow switch statements based on\r | |
33 | // size of operands or data.\r | |
34 | //\r | |
35 | #define DATA_SIZE_INVALID 0\r | |
36 | #define DATA_SIZE_8 1\r | |
37 | #define DATA_SIZE_16 2\r | |
38 | #define DATA_SIZE_32 4\r | |
39 | #define DATA_SIZE_64 8\r | |
40 | #define DATA_SIZE_N 48 // 4 or 8\r | |
41 | //\r | |
42 | // Structure we'll use to dispatch opcodes to execute functions.\r | |
43 | //\r | |
44 | typedef struct {\r | |
45 | EFI_STATUS (*ExecuteFunction) (IN VM_CONTEXT * VmPtr);\r | |
46 | }\r | |
47 | VM_TABLE_ENTRY;\r | |
48 | \r | |
49 | typedef\r | |
50 | UINT64\r | |
51 | (*DATA_MANIP_EXEC_FUNCTION) (\r | |
52 | IN VM_CONTEXT * VmPtr,\r | |
53 | IN UINT64 Op1,\r | |
54 | IN UINT64 Op2\r | |
55 | );\r | |
56 | \r | |
57 | STATIC\r | |
58 | INT16\r | |
59 | VmReadIndex16 (\r | |
60 | IN VM_CONTEXT *VmPtr,\r | |
61 | IN UINT32 CodeOffset\r | |
62 | );\r | |
63 | \r | |
64 | STATIC\r | |
65 | INT32\r | |
66 | VmReadIndex32 (\r | |
67 | IN VM_CONTEXT *VmPtr,\r | |
68 | IN UINT32 CodeOffset\r | |
69 | );\r | |
70 | \r | |
71 | STATIC\r | |
72 | INT64\r | |
73 | VmReadIndex64 (\r | |
74 | IN VM_CONTEXT *VmPtr,\r | |
75 | IN UINT32 CodeOffset\r | |
76 | );\r | |
77 | \r | |
78 | STATIC\r | |
79 | UINT8\r | |
80 | VmReadMem8 (\r | |
81 | IN VM_CONTEXT *VmPtr,\r | |
82 | IN UINTN Addr\r | |
83 | );\r | |
84 | \r | |
85 | STATIC\r | |
86 | UINT16\r | |
87 | VmReadMem16 (\r | |
88 | IN VM_CONTEXT *VmPtr,\r | |
89 | IN UINTN Addr\r | |
90 | );\r | |
91 | \r | |
92 | STATIC\r | |
93 | UINT32\r | |
94 | VmReadMem32 (\r | |
95 | IN VM_CONTEXT *VmPtr,\r | |
96 | IN UINTN Addr\r | |
97 | );\r | |
98 | \r | |
99 | STATIC\r | |
100 | UINT64\r | |
101 | VmReadMem64 (\r | |
102 | IN VM_CONTEXT *VmPtr,\r | |
103 | IN UINTN Addr\r | |
104 | );\r | |
105 | \r | |
106 | STATIC\r | |
107 | UINTN\r | |
108 | VmReadMemN (\r | |
109 | IN VM_CONTEXT *VmPtr,\r | |
110 | IN UINTN Addr\r | |
111 | );\r | |
112 | \r | |
113 | STATIC\r | |
114 | EFI_STATUS\r | |
115 | VmWriteMem8 (\r | |
116 | IN VM_CONTEXT *VmPtr,\r | |
117 | UINTN Addr,\r | |
118 | IN UINT8 Data\r | |
119 | );\r | |
120 | \r | |
121 | STATIC\r | |
122 | EFI_STATUS\r | |
123 | VmWriteMem16 (\r | |
124 | IN VM_CONTEXT *VmPtr,\r | |
125 | UINTN Addr,\r | |
126 | IN UINT16 Data\r | |
127 | );\r | |
128 | \r | |
129 | STATIC\r | |
130 | EFI_STATUS\r | |
131 | VmWriteMem32 (\r | |
132 | IN VM_CONTEXT *VmPtr,\r | |
133 | UINTN Addr,\r | |
134 | IN UINT32 Data\r | |
135 | );\r | |
136 | \r | |
878ddf1f | 137 | STATIC\r |
138 | UINT16\r | |
139 | VmReadCode16 (\r | |
140 | IN VM_CONTEXT *VmPtr,\r | |
141 | IN UINT32 Offset\r | |
142 | );\r | |
143 | \r | |
144 | STATIC\r | |
145 | UINT32\r | |
146 | VmReadCode32 (\r | |
147 | IN VM_CONTEXT *VmPtr,\r | |
148 | IN UINT32 Offset\r | |
149 | );\r | |
150 | \r | |
151 | STATIC\r | |
152 | UINT64\r | |
153 | VmReadCode64 (\r | |
154 | IN VM_CONTEXT *VmPtr,\r | |
155 | IN UINT32 Offset\r | |
156 | );\r | |
157 | \r | |
158 | STATIC\r | |
159 | INT8\r | |
160 | VmReadImmed8 (\r | |
161 | IN VM_CONTEXT *VmPtr,\r | |
162 | IN UINT32 Offset\r | |
163 | );\r | |
164 | \r | |
165 | STATIC\r | |
166 | INT16\r | |
167 | VmReadImmed16 (\r | |
168 | IN VM_CONTEXT *VmPtr,\r | |
169 | IN UINT32 Offset\r | |
170 | );\r | |
171 | \r | |
172 | STATIC\r | |
173 | INT32\r | |
174 | VmReadImmed32 (\r | |
175 | IN VM_CONTEXT *VmPtr,\r | |
176 | IN UINT32 Offset\r | |
177 | );\r | |
178 | \r | |
179 | STATIC\r | |
180 | INT64\r | |
181 | VmReadImmed64 (\r | |
182 | IN VM_CONTEXT *VmPtr,\r | |
183 | IN UINT32 Offset\r | |
184 | );\r | |
185 | \r | |
186 | STATIC\r | |
187 | UINTN\r | |
188 | ConvertStackAddr (\r | |
189 | IN VM_CONTEXT *VmPtr,\r | |
190 | IN UINTN Addr\r | |
191 | );\r | |
192 | \r | |
193 | STATIC\r | |
194 | EFI_STATUS\r | |
195 | ExecuteDataManip (\r | |
196 | IN VM_CONTEXT *VmPtr,\r | |
197 | IN BOOLEAN IsSignedOperation\r | |
198 | );\r | |
199 | \r | |
200 | //\r | |
201 | // Functions that execute VM opcodes\r | |
202 | //\r | |
203 | STATIC\r | |
204 | EFI_STATUS\r | |
205 | ExecuteBREAK (\r | |
206 | IN VM_CONTEXT *VmPtr\r | |
207 | );\r | |
208 | \r | |
209 | STATIC\r | |
210 | EFI_STATUS\r | |
211 | ExecuteJMP (\r | |
212 | IN VM_CONTEXT *VmPtr\r | |
213 | );\r | |
214 | \r | |
215 | STATIC\r | |
216 | EFI_STATUS\r | |
217 | ExecuteJMP8 (\r | |
218 | IN VM_CONTEXT *VmPtr\r | |
219 | );\r | |
220 | \r | |
221 | STATIC\r | |
222 | EFI_STATUS\r | |
223 | ExecuteCALL (\r | |
224 | IN VM_CONTEXT *VmPtr\r | |
225 | );\r | |
226 | \r | |
227 | STATIC\r | |
228 | EFI_STATUS\r | |
229 | ExecuteRET (\r | |
230 | IN VM_CONTEXT *VmPtr\r | |
231 | );\r | |
232 | \r | |
233 | STATIC\r | |
234 | EFI_STATUS\r | |
235 | ExecuteCMP (\r | |
236 | IN VM_CONTEXT *VmPtr\r | |
237 | );\r | |
238 | \r | |
239 | STATIC\r | |
240 | EFI_STATUS\r | |
241 | ExecuteCMPI (\r | |
242 | IN VM_CONTEXT *VmPtr\r | |
243 | );\r | |
244 | \r | |
245 | STATIC\r | |
246 | EFI_STATUS\r | |
247 | ExecuteMOVxx (\r | |
248 | IN VM_CONTEXT *VmPtr\r | |
249 | );\r | |
250 | \r | |
251 | STATIC\r | |
252 | EFI_STATUS\r | |
253 | ExecuteMOVI (\r | |
254 | IN VM_CONTEXT *VmPtr\r | |
255 | );\r | |
256 | \r | |
257 | STATIC\r | |
258 | EFI_STATUS\r | |
259 | ExecuteMOVIn (\r | |
260 | IN VM_CONTEXT *VmPtr\r | |
261 | );\r | |
262 | \r | |
263 | STATIC\r | |
264 | EFI_STATUS\r | |
265 | ExecuteMOVREL (\r | |
266 | IN VM_CONTEXT *VmPtr\r | |
267 | );\r | |
268 | \r | |
269 | STATIC\r | |
270 | EFI_STATUS\r | |
271 | ExecutePUSHn (\r | |
272 | IN VM_CONTEXT *VmPtr\r | |
273 | );\r | |
274 | \r | |
275 | STATIC\r | |
276 | EFI_STATUS\r | |
277 | ExecutePUSH (\r | |
278 | IN VM_CONTEXT *VmPtr\r | |
279 | );\r | |
280 | \r | |
281 | STATIC\r | |
282 | EFI_STATUS\r | |
283 | ExecutePOPn (\r | |
284 | IN VM_CONTEXT *VmPtr\r | |
285 | );\r | |
286 | \r | |
287 | STATIC\r | |
288 | EFI_STATUS\r | |
289 | ExecutePOP (\r | |
290 | IN VM_CONTEXT *VmPtr\r | |
291 | );\r | |
292 | \r | |
293 | STATIC\r | |
294 | EFI_STATUS\r | |
295 | ExecuteSignedDataManip (\r | |
296 | IN VM_CONTEXT *VmPtr\r | |
297 | );\r | |
298 | \r | |
299 | STATIC\r | |
300 | EFI_STATUS\r | |
301 | ExecuteUnsignedDataManip (\r | |
302 | IN VM_CONTEXT *VmPtr\r | |
303 | );\r | |
304 | \r | |
305 | STATIC\r | |
306 | EFI_STATUS\r | |
307 | ExecuteLOADSP (\r | |
308 | IN VM_CONTEXT *VmPtr\r | |
309 | );\r | |
310 | \r | |
311 | STATIC\r | |
312 | EFI_STATUS\r | |
313 | ExecuteSTORESP (\r | |
314 | IN VM_CONTEXT *VmPtr\r | |
315 | );\r | |
316 | \r | |
317 | STATIC\r | |
318 | EFI_STATUS\r | |
319 | ExecuteMOVsnd (\r | |
320 | IN VM_CONTEXT *VmPtr\r | |
321 | );\r | |
322 | \r | |
323 | STATIC\r | |
324 | EFI_STATUS\r | |
325 | ExecuteMOVsnw (\r | |
326 | IN VM_CONTEXT *VmPtr\r | |
327 | );\r | |
328 | \r | |
329 | //\r | |
330 | // Data manipulation subfunctions\r | |
331 | //\r | |
332 | STATIC\r | |
333 | UINT64\r | |
334 | ExecuteNOT (\r | |
335 | IN VM_CONTEXT *VmPtr,\r | |
336 | IN UINT64 Op1,\r | |
337 | IN UINT64 Op2\r | |
338 | );\r | |
339 | \r | |
340 | STATIC\r | |
341 | UINT64\r | |
342 | ExecuteNEG (\r | |
343 | IN VM_CONTEXT *VmPtr,\r | |
344 | IN UINT64 Op1,\r | |
345 | IN UINT64 Op2\r | |
346 | );\r | |
347 | \r | |
348 | STATIC\r | |
349 | UINT64\r | |
350 | ExecuteADD (\r | |
351 | IN VM_CONTEXT *VmPtr,\r | |
352 | IN UINT64 Op1,\r | |
353 | IN UINT64 Op2\r | |
354 | );\r | |
355 | \r | |
356 | STATIC\r | |
357 | UINT64\r | |
358 | ExecuteSUB (\r | |
359 | IN VM_CONTEXT *VmPtr,\r | |
360 | IN UINT64 Op1,\r | |
361 | IN UINT64 Op2\r | |
362 | );\r | |
363 | \r | |
364 | STATIC\r | |
365 | UINT64\r | |
366 | ExecuteMUL (\r | |
367 | IN VM_CONTEXT *VmPtr,\r | |
368 | IN UINT64 Op1,\r | |
369 | IN UINT64 Op2\r | |
370 | );\r | |
371 | \r | |
372 | STATIC\r | |
373 | UINT64\r | |
374 | ExecuteMULU (\r | |
375 | IN VM_CONTEXT *VmPtr,\r | |
376 | IN UINT64 Op1,\r | |
377 | IN UINT64 Op2\r | |
378 | );\r | |
379 | \r | |
380 | STATIC\r | |
381 | UINT64\r | |
382 | ExecuteDIV (\r | |
383 | IN VM_CONTEXT *VmPtr,\r | |
384 | IN UINT64 Op1,\r | |
385 | IN UINT64 Op2\r | |
386 | );\r | |
387 | \r | |
388 | STATIC\r | |
389 | UINT64\r | |
390 | ExecuteDIVU (\r | |
391 | IN VM_CONTEXT *VmPtr,\r | |
392 | IN UINT64 Op1,\r | |
393 | IN UINT64 Op2\r | |
394 | );\r | |
395 | \r | |
396 | STATIC\r | |
397 | UINT64\r | |
398 | ExecuteMOD (\r | |
399 | IN VM_CONTEXT *VmPtr,\r | |
400 | IN UINT64 Op1,\r | |
401 | IN UINT64 Op2\r | |
402 | );\r | |
403 | \r | |
404 | STATIC\r | |
405 | UINT64\r | |
406 | ExecuteMODU (\r | |
407 | IN VM_CONTEXT *VmPtr,\r | |
408 | IN UINT64 Op1,\r | |
409 | IN UINT64 Op2\r | |
410 | );\r | |
411 | \r | |
412 | STATIC\r | |
413 | UINT64\r | |
414 | ExecuteAND (\r | |
415 | IN VM_CONTEXT *VmPtr,\r | |
416 | IN UINT64 Op1,\r | |
417 | IN UINT64 Op2\r | |
418 | );\r | |
419 | \r | |
420 | STATIC\r | |
421 | UINT64\r | |
422 | ExecuteOR (\r | |
423 | IN VM_CONTEXT *VmPtr,\r | |
424 | IN UINT64 Op1,\r | |
425 | IN UINT64 Op2\r | |
426 | );\r | |
427 | \r | |
428 | STATIC\r | |
429 | UINT64\r | |
430 | ExecuteXOR (\r | |
431 | IN VM_CONTEXT *VmPtr,\r | |
432 | IN UINT64 Op1,\r | |
433 | IN UINT64 Op2\r | |
434 | );\r | |
435 | \r | |
436 | STATIC\r | |
437 | UINT64\r | |
438 | ExecuteSHL (\r | |
439 | IN VM_CONTEXT *VmPtr,\r | |
440 | IN UINT64 Op1,\r | |
441 | IN UINT64 Op2\r | |
442 | );\r | |
443 | \r | |
444 | STATIC\r | |
445 | UINT64\r | |
446 | ExecuteSHR (\r | |
447 | IN VM_CONTEXT *VmPtr,\r | |
448 | IN UINT64 Op1,\r | |
449 | IN UINT64 Op2\r | |
450 | );\r | |
451 | \r | |
452 | STATIC\r | |
453 | UINT64\r | |
454 | ExecuteASHR (\r | |
455 | IN VM_CONTEXT *VmPtr,\r | |
456 | IN UINT64 Op1,\r | |
457 | IN UINT64 Op2\r | |
458 | );\r | |
459 | \r | |
460 | STATIC\r | |
461 | UINT64\r | |
462 | ExecuteEXTNDB (\r | |
463 | IN VM_CONTEXT *VmPtr,\r | |
464 | IN UINT64 Op1,\r | |
465 | IN UINT64 Op2\r | |
466 | );\r | |
467 | \r | |
468 | STATIC\r | |
469 | UINT64\r | |
470 | ExecuteEXTNDW (\r | |
471 | IN VM_CONTEXT *VmPtr,\r | |
472 | IN UINT64 Op1,\r | |
473 | IN UINT64 Op2\r | |
474 | );\r | |
475 | \r | |
476 | STATIC\r | |
477 | UINT64\r | |
478 | ExecuteEXTNDD (\r | |
479 | IN VM_CONTEXT *VmPtr,\r | |
480 | IN UINT64 Op1,\r | |
481 | IN UINT64 Op2\r | |
482 | );\r | |
483 | \r | |
484 | //\r | |
485 | // Once we retrieve the operands for the data manipulation instructions,\r | |
486 | // call these functions to perform the operation.\r | |
487 | //\r | |
488 | static CONST DATA_MANIP_EXEC_FUNCTION mDataManipDispatchTable[] = {\r | |
489 | ExecuteNOT,\r | |
490 | ExecuteNEG,\r | |
491 | ExecuteADD,\r | |
492 | ExecuteSUB,\r | |
493 | ExecuteMUL,\r | |
494 | ExecuteMULU,\r | |
495 | ExecuteDIV,\r | |
496 | ExecuteDIVU,\r | |
497 | ExecuteMOD,\r | |
498 | ExecuteMODU,\r | |
499 | ExecuteAND,\r | |
500 | ExecuteOR,\r | |
501 | ExecuteXOR,\r | |
502 | ExecuteSHL,\r | |
503 | ExecuteSHR,\r | |
504 | ExecuteASHR,\r | |
505 | ExecuteEXTNDB,\r | |
506 | ExecuteEXTNDW,\r | |
507 | ExecuteEXTNDD,\r | |
508 | };\r | |
509 | \r | |
510 | static CONST VM_TABLE_ENTRY mVmOpcodeTable[] = {\r | |
511 | { ExecuteBREAK }, // opcode 0x00\r | |
512 | { ExecuteJMP }, // opcode 0x01\r | |
513 | { ExecuteJMP8 }, // opcode 0x02\r | |
514 | { ExecuteCALL }, // opcode 0x03\r | |
515 | { ExecuteRET }, // opcode 0x04\r | |
516 | { ExecuteCMP }, // opcode 0x05 CMPeq\r | |
517 | { ExecuteCMP }, // opcode 0x06 CMPlte\r | |
518 | { ExecuteCMP }, // opcode 0x07 CMPgte\r | |
519 | { ExecuteCMP }, // opcode 0x08 CMPulte\r | |
520 | { ExecuteCMP }, // opcode 0x09 CMPugte\r | |
521 | { ExecuteUnsignedDataManip }, // opcode 0x0A NOT\r | |
522 | { ExecuteSignedDataManip }, // opcode 0x0B NEG\r | |
523 | { ExecuteSignedDataManip }, // opcode 0x0C ADD\r | |
524 | { ExecuteSignedDataManip }, // opcode 0x0D SUB\r | |
525 | { ExecuteSignedDataManip }, // opcode 0x0E MUL\r | |
526 | { ExecuteUnsignedDataManip }, // opcode 0x0F MULU\r | |
527 | { ExecuteSignedDataManip }, // opcode 0x10 DIV\r | |
528 | { ExecuteUnsignedDataManip }, // opcode 0x11 DIVU\r | |
529 | { ExecuteSignedDataManip }, // opcode 0x12 MOD\r | |
530 | { ExecuteUnsignedDataManip }, // opcode 0x13 MODU\r | |
531 | { ExecuteUnsignedDataManip }, // opcode 0x14 AND\r | |
532 | { ExecuteUnsignedDataManip }, // opcode 0x15 OR\r | |
533 | { ExecuteUnsignedDataManip }, // opcode 0x16 XOR\r | |
534 | { ExecuteUnsignedDataManip }, // opcode 0x17 SHL\r | |
535 | { ExecuteUnsignedDataManip }, // opcode 0x18 SHR\r | |
536 | { ExecuteSignedDataManip }, // opcode 0x19 ASHR\r | |
537 | { ExecuteUnsignedDataManip }, // opcode 0x1A EXTNDB\r | |
538 | { ExecuteUnsignedDataManip }, // opcode 0x1B EXTNDW\r | |
539 | { ExecuteUnsignedDataManip }, // opcode 0x1C EXTNDD\r | |
540 | { ExecuteMOVxx }, // opcode 0x1D MOVBW\r | |
541 | { ExecuteMOVxx }, // opcode 0x1E MOVWW\r | |
542 | { ExecuteMOVxx }, // opcode 0x1F MOVDW\r | |
543 | { ExecuteMOVxx }, // opcode 0x20 MOVQW\r | |
544 | { ExecuteMOVxx }, // opcode 0x21 MOVBD\r | |
545 | { ExecuteMOVxx }, // opcode 0x22 MOVWD\r | |
546 | { ExecuteMOVxx }, // opcode 0x23 MOVDD\r | |
547 | { ExecuteMOVxx }, // opcode 0x24 MOVQD\r | |
548 | { ExecuteMOVsnw }, // opcode 0x25 MOVsnw\r | |
549 | { ExecuteMOVsnd }, // opcode 0x26 MOVsnd\r | |
550 | { NULL }, // opcode 0x27\r | |
551 | { ExecuteMOVxx }, // opcode 0x28 MOVqq\r | |
552 | { ExecuteLOADSP }, // opcode 0x29 LOADSP SP1, R2\r | |
553 | { ExecuteSTORESP }, // opcode 0x2A STORESP R1, SP2\r | |
554 | { ExecutePUSH }, // opcode 0x2B PUSH {@}R1 [imm16]\r | |
555 | { ExecutePOP }, // opcode 0x2C POP {@}R1 [imm16]\r | |
556 | { ExecuteCMPI }, // opcode 0x2D CMPIEQ\r | |
557 | { ExecuteCMPI }, // opcode 0x2E CMPILTE\r | |
558 | { ExecuteCMPI }, // opcode 0x2F CMPIGTE\r | |
559 | { ExecuteCMPI }, // opcode 0x30 CMPIULTE\r | |
560 | { ExecuteCMPI }, // opcode 0x31 CMPIUGTE\r | |
561 | { ExecuteMOVxx }, // opcode 0x32 MOVN\r | |
562 | { ExecuteMOVxx }, // opcode 0x33 MOVND\r | |
563 | { NULL }, // opcode 0x34\r | |
564 | { ExecutePUSHn }, // opcode 0x35\r | |
565 | { ExecutePOPn }, // opcode 0x36\r | |
566 | { ExecuteMOVI }, // opcode 0x37 - mov immediate data\r | |
567 | { ExecuteMOVIn }, // opcode 0x38 - mov immediate natural\r | |
568 | { ExecuteMOVREL } // opcode 0x39 - move data relative to PC\r | |
569 | };\r | |
570 | \r | |
571 | //\r | |
572 | // Length of JMP instructions, depending on upper two bits of opcode.\r | |
573 | //\r | |
574 | static CONST UINT8 mJMPLen[] = { 2, 2, 6, 10 };\r | |
575 | \r | |
576 | //\r | |
577 | // Simple Debugger Protocol GUID\r | |
578 | //\r | |
579 | EFI_GUID mEbcSimpleDebuggerProtocolGuid = EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL_GUID;\r | |
580 | \r | |
581 | EFI_STATUS\r | |
582 | EbcExecuteInstructions (\r | |
583 | IN EFI_EBC_VM_TEST_PROTOCOL *This,\r | |
584 | IN VM_CONTEXT *VmPtr,\r | |
585 | IN OUT UINTN *InstructionCount\r | |
586 | )\r | |
587 | /*++\r | |
588 | \r | |
589 | Routine Description:\r | |
590 | \r | |
591 | Given a pointer to a new VM context, execute one or more instructions. This\r | |
592 | function is only used for test purposes via the EBC VM test protocol.\r | |
593 | \r | |
594 | Arguments:\r | |
595 | \r | |
596 | This - pointer to protocol interface\r | |
597 | VmPtr - pointer to a VM context\r | |
598 | InstructionCount - how many instructions to execute. 0 if don't count.\r | |
599 | \r | |
600 | Returns:\r | |
601 | \r | |
602 | EFI_UNSUPPORTED\r | |
603 | EFI_SUCCESS\r | |
604 | \r | |
605 | --*/\r | |
606 | {\r | |
607 | UINTN ExecFunc;\r | |
608 | EFI_STATUS Status;\r | |
609 | UINTN InstructionsLeft;\r | |
610 | UINTN SavedInstructionCount;\r | |
611 | \r | |
612 | Status = EFI_SUCCESS;\r | |
613 | \r | |
614 | if (*InstructionCount == 0) {\r | |
615 | InstructionsLeft = 1;\r | |
616 | } else {\r | |
617 | InstructionsLeft = *InstructionCount;\r | |
618 | }\r | |
619 | \r | |
620 | SavedInstructionCount = *InstructionCount;\r | |
621 | *InstructionCount = 0;\r | |
622 | \r | |
623 | //\r | |
624 | // Index into the opcode table using the opcode byte for this instruction.\r | |
625 | // This gives you the execute function, which we first test for null, then\r | |
626 | // call it if it's not null.\r | |
627 | //\r | |
628 | while (InstructionsLeft != 0) {\r | |
629 | ExecFunc = (UINTN) mVmOpcodeTable[(*VmPtr->Ip & 0x3F)].ExecuteFunction;\r | |
630 | if (ExecFunc == (UINTN) NULL) {\r | |
631 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
632 | return EFI_UNSUPPORTED;\r | |
633 | } else {\r | |
634 | mVmOpcodeTable[(*VmPtr->Ip & 0x3F)].ExecuteFunction (VmPtr);\r | |
635 | *InstructionCount = *InstructionCount + 1;\r | |
636 | }\r | |
637 | \r | |
638 | //\r | |
639 | // Decrement counter if applicable\r | |
640 | //\r | |
641 | if (SavedInstructionCount != 0) {\r | |
642 | InstructionsLeft--;\r | |
643 | }\r | |
644 | }\r | |
645 | \r | |
646 | return Status;\r | |
647 | }\r | |
648 | \r | |
649 | EFI_STATUS\r | |
650 | EbcExecute (\r | |
651 | IN VM_CONTEXT *VmPtr\r | |
652 | )\r | |
653 | /*++\r | |
654 | \r | |
655 | Routine Description:\r | |
656 | \r | |
657 | Execute an EBC image from an entry point or from a published protocol.\r | |
658 | \r | |
659 | Arguments:\r | |
660 | \r | |
661 | VmPtr - pointer to prepared VM context.\r | |
662 | \r | |
663 | Returns:\r | |
664 | \r | |
665 | Standard EBC status.\r | |
666 | \r | |
667 | --*/\r | |
668 | {\r | |
669 | UINTN ExecFunc;\r | |
670 | UINT8 StackCorrupted;\r | |
671 | EFI_STATUS Status;\r | |
672 | EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL *EbcSimpleDebugger;\r | |
673 | \r | |
c91eaa3d | 674 | mVmPtr = VmPtr;\r |
878ddf1f | 675 | EbcSimpleDebugger = NULL;\r |
676 | Status = EFI_SUCCESS;\r | |
677 | StackCorrupted = 0;\r | |
678 | \r | |
679 | //\r | |
680 | // Make sure the magic value has been put on the stack before we got here.\r | |
681 | //\r | |
682 | if (*VmPtr->StackMagicPtr != (UINTN) VM_STACK_KEY_VALUE) {\r | |
683 | StackCorrupted = 1;\r | |
684 | }\r | |
685 | \r | |
686 | VmPtr->FramePtr = (VOID *) ((UINT8 *) (UINTN) VmPtr->R[0] + 8);\r | |
687 | \r | |
688 | //\r | |
689 | // Try to get the debug support for EBC\r | |
690 | //\r | |
2ce31132 | 691 | DEBUG_CODE_BEGIN ();\r |
878ddf1f | 692 | Status = gBS->LocateProtocol (\r |
693 | &mEbcSimpleDebuggerProtocolGuid,\r | |
694 | NULL,\r | |
695 | (VOID **) &EbcSimpleDebugger\r | |
696 | );\r | |
697 | if (EFI_ERROR (Status)) {\r | |
698 | EbcSimpleDebugger = NULL;\r | |
699 | }\r | |
2ce31132 | 700 | DEBUG_CODE_END ();\r |
878ddf1f | 701 | \r |
702 | //\r | |
703 | // Save the start IP for debug. For example, if we take an exception we\r | |
704 | // can print out the location of the exception relative to the entry point,\r | |
705 | // which could then be used in a disassembly listing to find the problem.\r | |
706 | //\r | |
707 | VmPtr->EntryPoint = (VOID *) VmPtr->Ip;\r | |
708 | \r | |
709 | //\r | |
710 | // We'll wait for this flag to know when we're done. The RET\r | |
711 | // instruction sets it if it runs out of stack.\r | |
712 | //\r | |
713 | VmPtr->StopFlags = 0;\r | |
714 | while (!(VmPtr->StopFlags & STOPFLAG_APP_DONE)) {\r | |
715 | //\r | |
716 | // If we've found a simple debugger protocol, call it\r | |
717 | //\r | |
2ce31132 | 718 | DEBUG_CODE_BEGIN ();\r |
878ddf1f | 719 | if (EbcSimpleDebugger != NULL) {\r |
720 | EbcSimpleDebugger->Debugger (EbcSimpleDebugger, VmPtr);\r | |
721 | }\r | |
2ce31132 | 722 | DEBUG_CODE_END ();\r |
878ddf1f | 723 | \r |
724 | //\r | |
725 | // Verify the opcode is in range. Otherwise generate an exception.\r | |
726 | //\r | |
727 | if ((*VmPtr->Ip & OPCODE_M_OPCODE) >= (sizeof (mVmOpcodeTable) / sizeof (mVmOpcodeTable[0]))) {\r | |
728 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
729 | Status = EFI_UNSUPPORTED;\r | |
730 | goto Done;\r | |
731 | }\r | |
732 | //\r | |
733 | // Use the opcode bits to index into the opcode dispatch table. If the\r | |
734 | // function pointer is null then generate an exception.\r | |
735 | //\r | |
736 | ExecFunc = (UINTN) mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction;\r | |
737 | if (ExecFunc == (UINTN) NULL) {\r | |
738 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
739 | Status = EFI_UNSUPPORTED;\r | |
740 | goto Done;\r | |
741 | }\r | |
742 | //\r | |
743 | // The EBC VM is a strongly ordered processor, so perform a fence operation before\r | |
744 | // and after each instruction is executed.\r | |
745 | //\r | |
746 | MemoryFence ();\r | |
747 | \r | |
748 | mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction (VmPtr);\r | |
749 | \r | |
750 | MemoryFence ();\r | |
751 | \r | |
752 | //\r | |
753 | // If the step flag is set, signal an exception and continue. We don't\r | |
754 | // clear it here. Assuming the debugger is responsible for clearing it.\r | |
755 | //\r | |
756 | if (VMFLAG_ISSET (VmPtr, VMFLAGS_STEP)) {\r | |
757 | EbcDebugSignalException (EXCEPT_EBC_STEP, EXCEPTION_FLAG_NONE, VmPtr);\r | |
758 | }\r | |
759 | //\r | |
760 | // Make sure stack has not been corrupted. Only report it once though.\r | |
761 | //\r | |
762 | if (!StackCorrupted && (*VmPtr->StackMagicPtr != (UINTN) VM_STACK_KEY_VALUE)) {\r | |
763 | EbcDebugSignalException (EXCEPT_EBC_STACK_FAULT, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
764 | StackCorrupted = 1;\r | |
765 | }\r | |
766 | }\r | |
767 | \r | |
768 | Done:\r | |
c91eaa3d | 769 | mVmPtr = NULL;\r |
878ddf1f | 770 | return Status;\r |
771 | }\r | |
772 | \r | |
773 | STATIC\r | |
774 | EFI_STATUS\r | |
775 | ExecuteMOVxx (\r | |
776 | IN VM_CONTEXT *VmPtr\r | |
777 | )\r | |
778 | /*++\r | |
779 | \r | |
780 | Routine Description:\r | |
781 | \r | |
782 | Execute the MOVxx instructions.\r | |
783 | \r | |
784 | Arguments:\r | |
785 | \r | |
786 | VmPtr - pointer to a VM context.\r | |
787 | \r | |
788 | Returns:\r | |
789 | \r | |
790 | EFI_UNSUPPORTED\r | |
791 | EFI_SUCCESS\r | |
792 | \r | |
793 | Instruction format:\r | |
794 | \r | |
795 | MOV[b|w|d|q|n]{w|d} {@}R1 {Index16|32}, {@}R2 {Index16|32}\r | |
796 | MOVqq {@}R1 {Index64}, {@}R2 {Index64}\r | |
797 | \r | |
798 | Copies contents of [R2] -> [R1], zero extending where required.\r | |
799 | \r | |
800 | First character indicates the size of the move.\r | |
801 | Second character indicates the size of the index(s).\r | |
802 | \r | |
803 | Invalid to have R1 direct with index.\r | |
804 | \r | |
805 | --*/\r | |
806 | {\r | |
807 | UINT8 Opcode;\r | |
808 | UINT8 OpcMasked;\r | |
809 | UINT8 Operands;\r | |
810 | UINT8 Size;\r | |
811 | UINT8 MoveSize;\r | |
812 | INT16 Index16;\r | |
813 | INT32 Index32;\r | |
814 | INT64 Index64Op1;\r | |
815 | INT64 Index64Op2;\r | |
816 | UINT64 Data64;\r | |
817 | UINT64 DataMask;\r | |
818 | UINTN Source;\r | |
819 | \r | |
820 | Opcode = GETOPCODE (VmPtr);\r | |
821 | OpcMasked = (UINT8) (Opcode & OPCODE_M_OPCODE);\r | |
822 | \r | |
823 | //\r | |
824 | // Get the operands byte so we can get R1 and R2\r | |
825 | //\r | |
826 | Operands = GETOPERANDS (VmPtr);\r | |
827 | \r | |
828 | //\r | |
829 | // Assume no indexes\r | |
830 | //\r | |
831 | Index64Op1 = 0;\r | |
832 | Index64Op2 = 0;\r | |
833 | Data64 = 0;\r | |
834 | \r | |
835 | //\r | |
836 | // Determine if we have an index/immediate data. Base instruction size\r | |
837 | // is 2 (opcode + operands). Add to this size each index specified.\r | |
838 | //\r | |
839 | Size = 2;\r | |
840 | if (Opcode & (OPCODE_M_IMMED_OP1 | OPCODE_M_IMMED_OP2)) {\r | |
841 | //\r | |
842 | // Determine size of the index from the opcode. Then get it.\r | |
843 | //\r | |
844 | if ((OpcMasked <= OPCODE_MOVQW) || (OpcMasked == OPCODE_MOVNW)) {\r | |
845 | //\r | |
846 | // MOVBW, MOVWW, MOVDW, MOVQW, and MOVNW have 16-bit immediate index.\r | |
847 | // Get one or both index values.\r | |
848 | //\r | |
849 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
850 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
851 | Index64Op1 = (INT64) Index16;\r | |
852 | Size += sizeof (UINT16);\r | |
853 | }\r | |
854 | \r | |
855 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
856 | Index16 = VmReadIndex16 (VmPtr, Size);\r | |
857 | Index64Op2 = (INT64) Index16;\r | |
858 | Size += sizeof (UINT16);\r | |
859 | }\r | |
860 | } else if ((OpcMasked <= OPCODE_MOVQD) || (OpcMasked == OPCODE_MOVND)) {\r | |
861 | //\r | |
862 | // MOVBD, MOVWD, MOVDD, MOVQD, and MOVND have 32-bit immediate index\r | |
863 | //\r | |
864 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
865 | Index32 = VmReadIndex32 (VmPtr, 2);\r | |
866 | Index64Op1 = (INT64) Index32;\r | |
867 | Size += sizeof (UINT32);\r | |
868 | }\r | |
869 | \r | |
870 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
871 | Index32 = VmReadIndex32 (VmPtr, Size);\r | |
872 | Index64Op2 = (INT64) Index32;\r | |
873 | Size += sizeof (UINT32);\r | |
874 | }\r | |
875 | } else if (OpcMasked == OPCODE_MOVQQ) {\r | |
876 | //\r | |
877 | // MOVqq -- only form with a 64-bit index\r | |
878 | //\r | |
879 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
880 | Index64Op1 = VmReadIndex64 (VmPtr, 2);\r | |
881 | Size += sizeof (UINT64);\r | |
882 | }\r | |
883 | \r | |
884 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
885 | Index64Op2 = VmReadIndex64 (VmPtr, Size);\r | |
886 | Size += sizeof (UINT64);\r | |
887 | }\r | |
888 | } else {\r | |
889 | //\r | |
890 | // Obsolete MOVBQ, MOVWQ, MOVDQ, and MOVNQ have 64-bit immediate index\r | |
891 | //\r | |
892 | EbcDebugSignalException (\r | |
893 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
894 | EXCEPTION_FLAG_FATAL,\r | |
895 | VmPtr\r | |
896 | );\r | |
897 | return EFI_UNSUPPORTED;\r | |
898 | }\r | |
899 | }\r | |
900 | //\r | |
901 | // Determine the size of the move, and create a mask for it so we can\r | |
902 | // clear unused bits.\r | |
903 | //\r | |
904 | if ((OpcMasked == OPCODE_MOVBW) || (OpcMasked == OPCODE_MOVBD)) {\r | |
905 | MoveSize = DATA_SIZE_8;\r | |
906 | DataMask = 0xFF;\r | |
907 | } else if ((OpcMasked == OPCODE_MOVWW) || (OpcMasked == OPCODE_MOVWD)) {\r | |
908 | MoveSize = DATA_SIZE_16;\r | |
909 | DataMask = 0xFFFF;\r | |
910 | } else if ((OpcMasked == OPCODE_MOVDW) || (OpcMasked == OPCODE_MOVDD)) {\r | |
911 | MoveSize = DATA_SIZE_32;\r | |
912 | DataMask = 0xFFFFFFFF;\r | |
913 | } else if ((OpcMasked == OPCODE_MOVQW) || (OpcMasked == OPCODE_MOVQD) || (OpcMasked == OPCODE_MOVQQ)) {\r | |
914 | MoveSize = DATA_SIZE_64;\r | |
915 | DataMask = (UINT64)~0;\r | |
916 | } else if ((OpcMasked == OPCODE_MOVNW) || (OpcMasked == OPCODE_MOVND)) {\r | |
917 | MoveSize = DATA_SIZE_N;\r | |
918 | DataMask = (UINT64)~0 >> (64 - 8 * sizeof (UINTN));\r | |
919 | } else {\r | |
920 | //\r | |
921 | // We were dispatched to this function and we don't recognize the opcode\r | |
922 | //\r | |
923 | EbcDebugSignalException (EXCEPT_EBC_UNDEFINED, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
924 | return EFI_UNSUPPORTED;\r | |
925 | }\r | |
926 | //\r | |
927 | // Now get the source address\r | |
928 | //\r | |
929 | if (OPERAND2_INDIRECT (Operands)) {\r | |
930 | //\r | |
931 | // Indirect form @R2. Compute address of operand2\r | |
932 | //\r | |
933 | Source = (UINTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Index64Op2);\r | |
934 | //\r | |
935 | // Now get the data from the source. Always 0-extend and let the compiler\r | |
936 | // sign-extend where required.\r | |
937 | //\r | |
938 | switch (MoveSize) {\r | |
939 | case DATA_SIZE_8:\r | |
940 | Data64 = (UINT64) (UINT8) VmReadMem8 (VmPtr, Source);\r | |
941 | break;\r | |
942 | \r | |
943 | case DATA_SIZE_16:\r | |
944 | Data64 = (UINT64) (UINT16) VmReadMem16 (VmPtr, Source);\r | |
945 | break;\r | |
946 | \r | |
947 | case DATA_SIZE_32:\r | |
948 | Data64 = (UINT64) (UINT32) VmReadMem32 (VmPtr, Source);\r | |
949 | break;\r | |
950 | \r | |
951 | case DATA_SIZE_64:\r | |
952 | Data64 = (UINT64) VmReadMem64 (VmPtr, Source);\r | |
953 | break;\r | |
954 | \r | |
955 | case DATA_SIZE_N:\r | |
956 | Data64 = (UINT64) (UINTN) VmReadMemN (VmPtr, Source);\r | |
957 | break;\r | |
958 | \r | |
959 | default:\r | |
960 | //\r | |
961 | // not reached\r | |
962 | //\r | |
963 | break;\r | |
964 | }\r | |
965 | } else {\r | |
966 | //\r | |
967 | // Not indirect source: MOVxx {@}Rx, Ry [Index]\r | |
968 | //\r | |
969 | Data64 = VmPtr->R[OPERAND2_REGNUM (Operands)] + Index64Op2;\r | |
970 | //\r | |
971 | // Did Operand2 have an index? If so, treat as two signed values since\r | |
972 | // indexes are signed values.\r | |
973 | //\r | |
974 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
975 | //\r | |
976 | // NOTE: need to find a way to fix this, most likely by changing the VM\r | |
977 | // implementation to remove the stack gap. To do that, we'd need to\r | |
978 | // allocate stack space for the VM and actually set the system\r | |
979 | // stack pointer to the allocated buffer when the VM starts.\r | |
980 | //\r | |
981 | // Special case -- if someone took the address of a function parameter\r | |
982 | // then we need to make sure it's not in the stack gap. We can identify\r | |
983 | // this situation if (Operand2 register == 0) && (Operand2 is direct)\r | |
984 | // && (Index applies to Operand2) && (Index > 0) && (Operand1 register != 0)\r | |
985 | // Situations that to be aware of:\r | |
986 | // * stack adjustments at beginning and end of functions R0 = R0 += stacksize\r | |
987 | //\r | |
988 | if ((OPERAND2_REGNUM (Operands) == 0) &&\r | |
989 | (!OPERAND2_INDIRECT (Operands)) &&\r | |
990 | (Index64Op2 > 0) &&\r | |
991 | (OPERAND1_REGNUM (Operands) == 0) &&\r | |
992 | (OPERAND1_INDIRECT (Operands))\r | |
993 | ) {\r | |
994 | Data64 = (UINT64) ConvertStackAddr (VmPtr, (UINTN) (INT64) Data64);\r | |
995 | }\r | |
996 | }\r | |
997 | }\r | |
998 | //\r | |
999 | // Now write it back\r | |
1000 | //\r | |
1001 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1002 | //\r | |
1003 | // Reuse the Source variable to now be dest.\r | |
1004 | //\r | |
1005 | Source = (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index64Op1);\r | |
1006 | //\r | |
1007 | // Do the write based on the size\r | |
1008 | //\r | |
1009 | switch (MoveSize) {\r | |
1010 | case DATA_SIZE_8:\r | |
1011 | VmWriteMem8 (VmPtr, Source, (UINT8) Data64);\r | |
1012 | break;\r | |
1013 | \r | |
1014 | case DATA_SIZE_16:\r | |
1015 | VmWriteMem16 (VmPtr, Source, (UINT16) Data64);\r | |
1016 | break;\r | |
1017 | \r | |
1018 | case DATA_SIZE_32:\r | |
1019 | VmWriteMem32 (VmPtr, Source, (UINT32) Data64);\r | |
1020 | break;\r | |
1021 | \r | |
1022 | case DATA_SIZE_64:\r | |
1023 | VmWriteMem64 (VmPtr, Source, Data64);\r | |
1024 | break;\r | |
1025 | \r | |
1026 | case DATA_SIZE_N:\r | |
1027 | VmWriteMemN (VmPtr, Source, (UINTN) Data64);\r | |
1028 | break;\r | |
1029 | \r | |
1030 | default:\r | |
1031 | //\r | |
1032 | // not reached\r | |
1033 | //\r | |
1034 | break;\r | |
1035 | }\r | |
1036 | } else {\r | |
1037 | //\r | |
1038 | // Operand1 direct.\r | |
1039 | // Make sure we didn't have an index on operand1.\r | |
1040 | //\r | |
1041 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
1042 | EbcDebugSignalException (\r | |
1043 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1044 | EXCEPTION_FLAG_FATAL,\r | |
1045 | VmPtr\r | |
1046 | );\r | |
1047 | return EFI_UNSUPPORTED;\r | |
1048 | }\r | |
1049 | //\r | |
1050 | // Direct storage in register. Clear unused bits and store back to\r | |
1051 | // register.\r | |
1052 | //\r | |
1053 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Data64 & DataMask;\r | |
1054 | }\r | |
1055 | //\r | |
1056 | // Advance the instruction pointer\r | |
1057 | //\r | |
1058 | VmPtr->Ip += Size;\r | |
1059 | return EFI_SUCCESS;\r | |
1060 | }\r | |
1061 | \r | |
1062 | STATIC\r | |
1063 | EFI_STATUS\r | |
1064 | ExecuteBREAK (\r | |
1065 | IN VM_CONTEXT *VmPtr\r | |
1066 | )\r | |
1067 | /*++\r | |
1068 | \r | |
1069 | Routine Description:\r | |
1070 | \r | |
1071 | Execute the EBC BREAK instruction\r | |
1072 | \r | |
1073 | Arguments:\r | |
1074 | \r | |
1075 | VmPtr - pointer to current VM context\r | |
1076 | \r | |
1077 | Returns:\r | |
1078 | \r | |
1079 | EFI_UNSUPPORTED\r | |
1080 | EFI_SUCCESS\r | |
1081 | \r | |
1082 | --*/\r | |
1083 | {\r | |
1084 | UINT8 Operands;\r | |
1085 | VOID *EbcEntryPoint;\r | |
1086 | VOID *Thunk;\r | |
878ddf1f | 1087 | UINT64 U64EbcEntryPoint;\r |
1088 | INT32 Offset;\r | |
1089 | \r | |
1090 | Operands = GETOPERANDS (VmPtr);\r | |
1091 | switch (Operands) {\r | |
1092 | //\r | |
1093 | // Runaway program break. Generate an exception and terminate\r | |
1094 | //\r | |
1095 | case 0:\r | |
1096 | EbcDebugSignalException (EXCEPT_EBC_BAD_BREAK, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1097 | break;\r | |
1098 | \r | |
1099 | //\r | |
1100 | // Get VM version -- return VM revision number in R7\r | |
1101 | //\r | |
1102 | case 1:\r | |
1103 | //\r | |
1104 | // Bits:\r | |
1105 | // 63-17 = 0\r | |
1106 | // 16-8 = Major version\r | |
1107 | // 7-0 = Minor version\r | |
1108 | //\r | |
1109 | VmPtr->R[7] = GetVmVersion ();\r | |
1110 | break;\r | |
1111 | \r | |
1112 | //\r | |
1113 | // Debugger breakpoint\r | |
1114 | //\r | |
1115 | case 3:\r | |
1116 | VmPtr->StopFlags |= STOPFLAG_BREAKPOINT;\r | |
1117 | //\r | |
1118 | // See if someone has registered a handler\r | |
1119 | //\r | |
1120 | EbcDebugSignalException (\r | |
1121 | EXCEPT_EBC_BREAKPOINT,\r | |
1122 | EXCEPTION_FLAG_NONE,\r | |
1123 | VmPtr\r | |
1124 | );\r | |
1125 | //\r | |
1126 | // Don't advance the IP\r | |
1127 | //\r | |
1128 | return EFI_UNSUPPORTED;\r | |
1129 | break;\r | |
1130 | \r | |
1131 | //\r | |
1132 | // System call, which there are none, so NOP it.\r | |
1133 | //\r | |
1134 | case 4:\r | |
1135 | break;\r | |
1136 | \r | |
1137 | //\r | |
1138 | // Create a thunk for EBC code. R7 points to a 32-bit (in a 64-bit slot)\r | |
1139 | // "offset from self" pointer to the EBC entry point.\r | |
1140 | // After we're done, *(UINT64 *)R7 will be the address of the new thunk.\r | |
1141 | //\r | |
1142 | case 5:\r | |
1143 | Offset = (INT32) VmReadMem32 (VmPtr, (UINTN) VmPtr->R[7]);\r | |
1144 | U64EbcEntryPoint = (UINT64) (VmPtr->R[7] + Offset + 4);\r | |
1145 | EbcEntryPoint = (VOID *) (UINTN) U64EbcEntryPoint;\r | |
1146 | \r | |
1147 | //\r | |
1148 | // Now create a new thunk\r | |
1149 | //\r | |
1cc8ee78 | 1150 | EbcCreateThunks (VmPtr->ImageHandle, EbcEntryPoint, &Thunk, 0);\r |
878ddf1f | 1151 | \r |
1152 | //\r | |
1153 | // Finally replace the EBC entry point memory with the thunk address\r | |
1154 | //\r | |
1155 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[7], (UINT64) (UINTN) Thunk);\r | |
1156 | break;\r | |
1157 | \r | |
1158 | //\r | |
1159 | // Compiler setting version per value in R7\r | |
1160 | //\r | |
1161 | case 6:\r | |
1162 | VmPtr->CompilerVersion = (UINT32) VmPtr->R[7];\r | |
1163 | //\r | |
1164 | // Check compiler version against VM version?\r | |
1165 | //\r | |
1166 | break;\r | |
1167 | \r | |
1168 | //\r | |
1169 | // Unhandled break code. Signal exception.\r | |
1170 | //\r | |
1171 | default:\r | |
1172 | EbcDebugSignalException (EXCEPT_EBC_BAD_BREAK, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1173 | break;\r | |
1174 | }\r | |
1175 | //\r | |
1176 | // Advance IP\r | |
1177 | //\r | |
1178 | VmPtr->Ip += 2;\r | |
1179 | return EFI_SUCCESS;\r | |
1180 | }\r | |
1181 | \r | |
1182 | STATIC\r | |
1183 | EFI_STATUS\r | |
1184 | ExecuteJMP (\r | |
1185 | IN VM_CONTEXT *VmPtr\r | |
1186 | )\r | |
1187 | /*++\r | |
1188 | \r | |
1189 | Routine Description:\r | |
1190 | Execute the JMP instruction\r | |
1191 | \r | |
1192 | Arguments:\r | |
1193 | VmPtr - pointer to VM context\r | |
1194 | \r | |
1195 | Returns:\r | |
1196 | Standard EFI_STATUS\r | |
1197 | \r | |
1198 | Instruction syntax:\r | |
1199 | JMP64{cs|cc} Immed64\r | |
1200 | JMP32{cs|cc} {@}R1 {Immed32|Index32}\r | |
1201 | \r | |
1202 | Encoding:\r | |
1203 | b0.7 - immediate data present\r | |
1204 | b0.6 - 1 = 64 bit immediate data\r | |
1205 | 0 = 32 bit immediate data\r | |
1206 | b1.7 - 1 = conditional\r | |
1207 | b1.6 1 = CS (condition set)\r | |
1208 | 0 = CC (condition clear)\r | |
1209 | b1.4 1 = relative address\r | |
1210 | 0 = absolute address\r | |
1211 | b1.3 1 = operand1 indirect\r | |
1212 | b1.2-0 operand 1\r | |
1213 | \r | |
1214 | --*/\r | |
1215 | {\r | |
1216 | UINT8 Opcode;\r | |
1217 | UINT8 CompareSet;\r | |
1218 | UINT8 ConditionFlag;\r | |
1219 | UINT8 Size;\r | |
1220 | UINT8 Operand;\r | |
1221 | UINT64 Data64;\r | |
1222 | INT32 Index32;\r | |
1223 | UINTN Addr;\r | |
1224 | \r | |
1225 | Operand = GETOPERANDS (VmPtr);\r | |
1226 | Opcode = GETOPCODE (VmPtr);\r | |
1227 | \r | |
1228 | //\r | |
1229 | // Get instruction length from the opcode. The upper two bits are used here\r | |
1230 | // to index into the length array.\r | |
1231 | //\r | |
1232 | Size = mJMPLen[(Opcode >> 6) & 0x03];\r | |
1233 | \r | |
1234 | //\r | |
1235 | // Decode instruction conditions\r | |
1236 | // If we haven't met the condition, then simply advance the IP and return.\r | |
1237 | //\r | |
1238 | CompareSet = (UINT8) ((Operand & JMP_M_CS) ? 1 : 0);\r | |
1239 | ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);\r | |
1240 | if (Operand & CONDITION_M_CONDITIONAL) {\r | |
1241 | if (CompareSet != ConditionFlag) {\r | |
1242 | VmPtr->Ip += Size;\r | |
1243 | return EFI_SUCCESS;\r | |
1244 | }\r | |
1245 | }\r | |
1246 | //\r | |
1247 | // Check for 64-bit form and do it right away since it's the most\r | |
1248 | // straight-forward form.\r | |
1249 | //\r | |
1250 | if (Opcode & OPCODE_M_IMMDATA64) {\r | |
1251 | //\r | |
1252 | // Double check for immediate-data, which is required. If not there,\r | |
1253 | // then signal an exception\r | |
1254 | //\r | |
1255 | if (!(Opcode & OPCODE_M_IMMDATA)) {\r | |
1256 | EbcDebugSignalException (\r | |
1257 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1258 | EXCEPTION_FLAG_ERROR,\r | |
1259 | VmPtr\r | |
1260 | );\r | |
1261 | return EFI_UNSUPPORTED;\r | |
1262 | }\r | |
1263 | //\r | |
1264 | // 64-bit immediate data is full address. Read the immediate data,\r | |
1265 | // check for alignment, and jump absolute.\r | |
1266 | //\r | |
1267 | Data64 = VmReadImmed64 (VmPtr, 2);\r | |
1268 | if (!IS_ALIGNED ((UINTN) Data64, sizeof (UINT16))) {\r | |
1269 | EbcDebugSignalException (\r | |
1270 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
1271 | EXCEPTION_FLAG_FATAL,\r | |
1272 | VmPtr\r | |
1273 | );\r | |
1274 | \r | |
1275 | return EFI_UNSUPPORTED;\r | |
1276 | }\r | |
1277 | \r | |
1278 | //\r | |
1279 | // Take jump -- relative or absolute\r | |
1280 | //\r | |
1281 | if (Operand & JMP_M_RELATIVE) {\r | |
1282 | VmPtr->Ip += (UINTN) Data64 + Size;\r | |
1283 | } else {\r | |
1284 | VmPtr->Ip = (VMIP) (UINTN) Data64;\r | |
1285 | }\r | |
1286 | \r | |
1287 | return EFI_SUCCESS;\r | |
1288 | }\r | |
1289 | //\r | |
1290 | // 32-bit forms:\r | |
1291 | // Get the index if there is one. May be either an index, or an immediate\r | |
1292 | // offset depending on indirect operand.\r | |
1293 | // JMP32 @R1 Index32 -- immediate data is an index\r | |
1294 | // JMP32 R1 Immed32 -- immedate data is an offset\r | |
1295 | //\r | |
1296 | if (Opcode & OPCODE_M_IMMDATA) {\r | |
1297 | if (OPERAND1_INDIRECT (Operand)) {\r | |
1298 | Index32 = VmReadIndex32 (VmPtr, 2);\r | |
1299 | } else {\r | |
1300 | Index32 = VmReadImmed32 (VmPtr, 2);\r | |
1301 | }\r | |
1302 | } else {\r | |
1303 | Index32 = 0;\r | |
1304 | }\r | |
1305 | //\r | |
1306 | // Get the register data. If R == 0, then special case where it's ignored.\r | |
1307 | //\r | |
1308 | if (OPERAND1_REGNUM (Operand) == 0) {\r | |
1309 | Data64 = 0;\r | |
1310 | } else {\r | |
1311 | Data64 = OPERAND1_REGDATA (VmPtr, Operand);\r | |
1312 | }\r | |
1313 | //\r | |
1314 | // Decode the forms\r | |
1315 | //\r | |
1316 | if (OPERAND1_INDIRECT (Operand)) {\r | |
1317 | //\r | |
1318 | // Form: JMP32 @Rx {Index32}\r | |
1319 | //\r | |
1320 | Addr = VmReadMemN (VmPtr, (UINTN) Data64 + Index32);\r | |
1321 | if (!IS_ALIGNED ((UINTN) Addr, sizeof (UINT16))) {\r | |
1322 | EbcDebugSignalException (\r | |
1323 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
1324 | EXCEPTION_FLAG_FATAL,\r | |
1325 | VmPtr\r | |
1326 | );\r | |
1327 | \r | |
1328 | return EFI_UNSUPPORTED;\r | |
1329 | }\r | |
1330 | \r | |
1331 | if (Operand & JMP_M_RELATIVE) {\r | |
1332 | VmPtr->Ip += (UINTN) Addr + Size;\r | |
1333 | } else {\r | |
1334 | VmPtr->Ip = (VMIP) Addr;\r | |
1335 | }\r | |
1336 | } else {\r | |
1337 | //\r | |
1338 | // Form: JMP32 Rx {Immed32}\r | |
1339 | //\r | |
1340 | Addr = (UINTN) (Data64 + Index32);\r | |
1341 | if (!IS_ALIGNED ((UINTN) Addr, sizeof (UINT16))) {\r | |
1342 | EbcDebugSignalException (\r | |
1343 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
1344 | EXCEPTION_FLAG_FATAL,\r | |
1345 | VmPtr\r | |
1346 | );\r | |
1347 | \r | |
1348 | return EFI_UNSUPPORTED;\r | |
1349 | }\r | |
1350 | \r | |
1351 | if (Operand & JMP_M_RELATIVE) {\r | |
1352 | VmPtr->Ip += (UINTN) Addr + Size;\r | |
1353 | } else {\r | |
1354 | VmPtr->Ip = (VMIP) Addr;\r | |
1355 | }\r | |
1356 | }\r | |
1357 | \r | |
1358 | return EFI_SUCCESS;\r | |
1359 | }\r | |
1360 | \r | |
1361 | STATIC\r | |
1362 | EFI_STATUS\r | |
1363 | ExecuteJMP8 (\r | |
1364 | IN VM_CONTEXT *VmPtr\r | |
1365 | )\r | |
1366 | /*++\r | |
1367 | \r | |
1368 | Routine Description:\r | |
1369 | Execute the EBC JMP8 instruction\r | |
1370 | \r | |
1371 | Arguments:\r | |
1372 | VmPtr - pointer to a VM context \r | |
1373 | \r | |
1374 | Returns:\r | |
1375 | Standard EFI_STATUS\r | |
1376 | \r | |
1377 | Instruction syntax:\r | |
1378 | JMP8{cs|cc} Offset/2\r | |
1379 | \r | |
1380 | --*/\r | |
1381 | {\r | |
1382 | UINT8 Opcode;\r | |
1383 | UINT8 ConditionFlag;\r | |
1384 | UINT8 CompareSet;\r | |
1385 | INT8 Offset;\r | |
1386 | \r | |
1387 | //\r | |
1388 | // Decode instruction.\r | |
1389 | //\r | |
1390 | Opcode = GETOPCODE (VmPtr);\r | |
1391 | CompareSet = (UINT8) ((Opcode & JMP_M_CS) ? 1 : 0);\r | |
1392 | ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);\r | |
1393 | \r | |
1394 | //\r | |
1395 | // If we haven't met the condition, then simply advance the IP and return\r | |
1396 | //\r | |
1397 | if (Opcode & CONDITION_M_CONDITIONAL) {\r | |
1398 | if (CompareSet != ConditionFlag) {\r | |
1399 | VmPtr->Ip += 2;\r | |
1400 | return EFI_SUCCESS;\r | |
1401 | }\r | |
1402 | }\r | |
1403 | //\r | |
1404 | // Get the offset from the instruction stream. It's relative to the\r | |
1405 | // following instruction, and divided by 2.\r | |
1406 | //\r | |
1407 | Offset = VmReadImmed8 (VmPtr, 1);\r | |
1408 | //\r | |
1409 | // Want to check for offset == -2 and then raise an exception?\r | |
1410 | //\r | |
1411 | VmPtr->Ip += (Offset * 2) + 2;\r | |
1412 | return EFI_SUCCESS;\r | |
1413 | }\r | |
1414 | \r | |
1415 | STATIC\r | |
1416 | EFI_STATUS\r | |
1417 | ExecuteMOVI (\r | |
1418 | IN VM_CONTEXT *VmPtr\r | |
1419 | )\r | |
1420 | /*++\r | |
1421 | \r | |
1422 | Routine Description:\r | |
1423 | \r | |
1424 | Execute the EBC MOVI \r | |
1425 | \r | |
1426 | Arguments:\r | |
1427 | \r | |
1428 | VmPtr - pointer to a VM context \r | |
1429 | \r | |
1430 | Returns:\r | |
1431 | \r | |
1432 | Standard EFI_STATUS\r | |
1433 | \r | |
1434 | Instruction syntax:\r | |
1435 | \r | |
1436 | MOVI[b|w|d|q][w|d|q] {@}R1 {Index16}, ImmData16|32|64\r | |
1437 | \r | |
1438 | First variable character specifies the move size\r | |
1439 | Second variable character specifies size of the immediate data\r | |
1440 | \r | |
1441 | Sign-extend the immediate data to the size of the operation, and zero-extend\r | |
1442 | if storing to a register.\r | |
1443 | \r | |
1444 | Operand1 direct with index/immed is invalid.\r | |
1445 | \r | |
1446 | --*/\r | |
1447 | {\r | |
1448 | UINT8 Opcode;\r | |
1449 | UINT8 Operands;\r | |
1450 | UINT8 Size;\r | |
1451 | INT16 Index16;\r | |
1452 | INT64 ImmData64;\r | |
1453 | UINT64 Op1;\r | |
1454 | UINT64 Mask64;\r | |
1455 | \r | |
1456 | //\r | |
1457 | // Get the opcode and operands byte so we can get R1 and R2\r | |
1458 | //\r | |
1459 | Opcode = GETOPCODE (VmPtr);\r | |
1460 | Operands = GETOPERANDS (VmPtr);\r | |
1461 | \r | |
1462 | //\r | |
1463 | // Get the index (16-bit) if present\r | |
1464 | //\r | |
1465 | if (Operands & MOVI_M_IMMDATA) {\r | |
1466 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1467 | Size = 4;\r | |
1468 | } else {\r | |
1469 | Index16 = 0;\r | |
1470 | Size = 2;\r | |
1471 | }\r | |
1472 | //\r | |
1473 | // Extract the immediate data. Sign-extend always.\r | |
1474 | //\r | |
1475 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
1476 | ImmData64 = (INT64) (INT16) VmReadImmed16 (VmPtr, Size);\r | |
1477 | Size += 2;\r | |
1478 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
1479 | ImmData64 = (INT64) (INT32) VmReadImmed32 (VmPtr, Size);\r | |
1480 | Size += 4;\r | |
1481 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
1482 | ImmData64 = (INT64) VmReadImmed64 (VmPtr, Size);\r | |
1483 | Size += 8;\r | |
1484 | } else {\r | |
1485 | //\r | |
1486 | // Invalid encoding\r | |
1487 | //\r | |
1488 | EbcDebugSignalException (\r | |
1489 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1490 | EXCEPTION_FLAG_FATAL,\r | |
1491 | VmPtr\r | |
1492 | );\r | |
1493 | return EFI_UNSUPPORTED;\r | |
1494 | }\r | |
1495 | //\r | |
1496 | // Now write back the result\r | |
1497 | //\r | |
1498 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1499 | //\r | |
1500 | // Operand1 direct. Make sure it didn't have an index.\r | |
1501 | //\r | |
1502 | if (Operands & MOVI_M_IMMDATA) {\r | |
1503 | EbcDebugSignalException (\r | |
1504 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1505 | EXCEPTION_FLAG_FATAL,\r | |
1506 | VmPtr\r | |
1507 | );\r | |
1508 | return EFI_UNSUPPORTED;\r | |
1509 | }\r | |
1510 | //\r | |
1511 | // Writing directly to a register. Clear unused bits.\r | |
1512 | //\r | |
1513 | if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH8) {\r | |
1514 | Mask64 = 0x000000FF;\r | |
1515 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH16) {\r | |
1516 | Mask64 = 0x0000FFFF;\r | |
1517 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH32) {\r | |
1518 | Mask64 = 0x00000000FFFFFFFF;\r | |
1519 | } else {\r | |
1520 | Mask64 = (UINT64)~0;\r | |
1521 | }\r | |
1522 | \r | |
1523 | VmPtr->R[OPERAND1_REGNUM (Operands)] = ImmData64 & Mask64;\r | |
1524 | } else {\r | |
1525 | //\r | |
1526 | // Get the address then write back based on size of the move\r | |
1527 | //\r | |
1528 | Op1 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
1529 | if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH8) {\r | |
1530 | VmWriteMem8 (VmPtr, (UINTN) Op1, (UINT8) ImmData64);\r | |
1531 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH16) {\r | |
1532 | VmWriteMem16 (VmPtr, (UINTN) Op1, (UINT16) ImmData64);\r | |
1533 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH32) {\r | |
1534 | VmWriteMem32 (VmPtr, (UINTN) Op1, (UINT32) ImmData64);\r | |
1535 | } else {\r | |
1536 | VmWriteMem64 (VmPtr, (UINTN) Op1, ImmData64);\r | |
1537 | }\r | |
1538 | }\r | |
1539 | //\r | |
1540 | // Advance the instruction pointer\r | |
1541 | //\r | |
1542 | VmPtr->Ip += Size;\r | |
1543 | return EFI_SUCCESS;\r | |
1544 | }\r | |
1545 | \r | |
1546 | STATIC\r | |
1547 | EFI_STATUS\r | |
1548 | ExecuteMOVIn (\r | |
1549 | IN VM_CONTEXT *VmPtr\r | |
1550 | )\r | |
1551 | /*++\r | |
1552 | \r | |
1553 | Routine Description:\r | |
1554 | \r | |
1555 | Execute the EBC MOV immediate natural. This instruction moves an immediate\r | |
1556 | index value into a register or memory location.\r | |
1557 | \r | |
1558 | Arguments:\r | |
1559 | \r | |
1560 | VmPtr - pointer to a VM context \r | |
1561 | \r | |
1562 | Returns:\r | |
1563 | \r | |
1564 | Standard EFI_STATUS\r | |
1565 | \r | |
1566 | Instruction syntax:\r | |
1567 | \r | |
1568 | MOVIn[w|d|q] {@}R1 {Index16}, Index16|32|64\r | |
1569 | \r | |
1570 | --*/\r | |
1571 | {\r | |
1572 | UINT8 Opcode;\r | |
1573 | UINT8 Operands;\r | |
1574 | UINT8 Size;\r | |
1575 | INT16 Index16;\r | |
1576 | INT16 ImmedIndex16;\r | |
1577 | INT32 ImmedIndex32;\r | |
1578 | INT64 ImmedIndex64;\r | |
1579 | UINT64 Op1;\r | |
1580 | \r | |
1581 | //\r | |
1582 | // Get the opcode and operands byte so we can get R1 and R2\r | |
1583 | //\r | |
1584 | Opcode = GETOPCODE (VmPtr);\r | |
1585 | Operands = GETOPERANDS (VmPtr);\r | |
1586 | \r | |
1587 | //\r | |
1588 | // Get the operand1 index (16-bit) if present\r | |
1589 | //\r | |
1590 | if (Operands & MOVI_M_IMMDATA) {\r | |
1591 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1592 | Size = 4;\r | |
1593 | } else {\r | |
1594 | Index16 = 0;\r | |
1595 | Size = 2;\r | |
1596 | }\r | |
1597 | //\r | |
1598 | // Extract the immediate data and convert to a 64-bit index.\r | |
1599 | //\r | |
1600 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
1601 | ImmedIndex16 = VmReadIndex16 (VmPtr, Size);\r | |
1602 | ImmedIndex64 = (INT64) ImmedIndex16;\r | |
1603 | Size += 2;\r | |
1604 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
1605 | ImmedIndex32 = VmReadIndex32 (VmPtr, Size);\r | |
1606 | ImmedIndex64 = (INT64) ImmedIndex32;\r | |
1607 | Size += 4;\r | |
1608 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
1609 | ImmedIndex64 = VmReadIndex64 (VmPtr, Size);\r | |
1610 | Size += 8;\r | |
1611 | } else {\r | |
1612 | //\r | |
1613 | // Invalid encoding\r | |
1614 | //\r | |
1615 | EbcDebugSignalException (\r | |
1616 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1617 | EXCEPTION_FLAG_FATAL,\r | |
1618 | VmPtr\r | |
1619 | );\r | |
1620 | return EFI_UNSUPPORTED;\r | |
1621 | }\r | |
1622 | //\r | |
1623 | // Now write back the result\r | |
1624 | //\r | |
1625 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1626 | //\r | |
1627 | // Check for MOVIn R1 Index16, Immed (not indirect, with index), which\r | |
1628 | // is illegal\r | |
1629 | //\r | |
1630 | if (Operands & MOVI_M_IMMDATA) {\r | |
1631 | EbcDebugSignalException (\r | |
1632 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1633 | EXCEPTION_FLAG_FATAL,\r | |
1634 | VmPtr\r | |
1635 | );\r | |
1636 | return EFI_UNSUPPORTED;\r | |
1637 | }\r | |
1638 | \r | |
1639 | VmPtr->R[OPERAND1_REGNUM (Operands)] = ImmedIndex64;\r | |
1640 | } else {\r | |
1641 | //\r | |
1642 | // Get the address\r | |
1643 | //\r | |
1644 | Op1 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
1645 | VmWriteMemN (VmPtr, (UINTN) Op1, (INTN) ImmedIndex64);\r | |
1646 | }\r | |
1647 | //\r | |
1648 | // Advance the instruction pointer\r | |
1649 | //\r | |
1650 | VmPtr->Ip += Size;\r | |
1651 | return EFI_SUCCESS;\r | |
1652 | }\r | |
1653 | \r | |
1654 | STATIC\r | |
1655 | EFI_STATUS\r | |
1656 | ExecuteMOVREL (\r | |
1657 | IN VM_CONTEXT *VmPtr\r | |
1658 | )\r | |
1659 | /*++\r | |
1660 | \r | |
1661 | Routine Description:\r | |
1662 | \r | |
1663 | Execute the EBC MOVREL instruction.\r | |
1664 | Dest <- Ip + ImmData\r | |
1665 | \r | |
1666 | Arguments:\r | |
1667 | \r | |
1668 | VmPtr - pointer to a VM context \r | |
1669 | \r | |
1670 | Returns:\r | |
1671 | \r | |
1672 | Standard EFI_STATUS\r | |
1673 | \r | |
1674 | Instruction syntax:\r | |
1675 | \r | |
1676 | MOVREL[w|d|q] {@}R1 {Index16}, ImmData16|32|64\r | |
1677 | \r | |
1678 | --*/\r | |
1679 | {\r | |
1680 | UINT8 Opcode;\r | |
1681 | UINT8 Operands;\r | |
1682 | UINT8 Size;\r | |
1683 | INT16 Index16;\r | |
1684 | INT64 ImmData64;\r | |
1685 | UINT64 Op1;\r | |
1686 | UINT64 Op2;\r | |
1687 | \r | |
1688 | //\r | |
1689 | // Get the opcode and operands byte so we can get R1 and R2\r | |
1690 | //\r | |
1691 | Opcode = GETOPCODE (VmPtr);\r | |
1692 | Operands = GETOPERANDS (VmPtr);\r | |
1693 | \r | |
1694 | //\r | |
1695 | // Get the Operand 1 index (16-bit) if present\r | |
1696 | //\r | |
1697 | if (Operands & MOVI_M_IMMDATA) {\r | |
1698 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1699 | Size = 4;\r | |
1700 | } else {\r | |
1701 | Index16 = 0;\r | |
1702 | Size = 2;\r | |
1703 | }\r | |
1704 | //\r | |
1705 | // Get the immediate data.\r | |
1706 | //\r | |
1707 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
1708 | ImmData64 = (INT64) VmReadImmed16 (VmPtr, Size);\r | |
1709 | Size += 2;\r | |
1710 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
1711 | ImmData64 = (INT64) VmReadImmed32 (VmPtr, Size);\r | |
1712 | Size += 4;\r | |
1713 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
1714 | ImmData64 = VmReadImmed64 (VmPtr, Size);\r | |
1715 | Size += 8;\r | |
1716 | } else {\r | |
1717 | //\r | |
1718 | // Invalid encoding\r | |
1719 | //\r | |
1720 | EbcDebugSignalException (\r | |
1721 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1722 | EXCEPTION_FLAG_FATAL,\r | |
1723 | VmPtr\r | |
1724 | );\r | |
1725 | return EFI_UNSUPPORTED;\r | |
1726 | }\r | |
1727 | //\r | |
1728 | // Compute the value and write back the result\r | |
1729 | //\r | |
1730 | Op2 = (UINT64) ((INT64) ((UINT64) (UINTN) VmPtr->Ip) + (INT64) ImmData64 + Size);\r | |
1731 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1732 | //\r | |
1733 | // Check for illegal combination of operand1 direct with immediate data\r | |
1734 | //\r | |
1735 | if (Operands & MOVI_M_IMMDATA) {\r | |
1736 | EbcDebugSignalException (\r | |
1737 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1738 | EXCEPTION_FLAG_FATAL,\r | |
1739 | VmPtr\r | |
1740 | );\r | |
1741 | return EFI_UNSUPPORTED;\r | |
1742 | }\r | |
1743 | \r | |
1744 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (VM_REGISTER) Op2;\r | |
1745 | } else {\r | |
1746 | //\r | |
1747 | // Get the address = [Rx] + Index16\r | |
1748 | // Write back the result. Always a natural size write, since\r | |
1749 | // we're talking addresses here.\r | |
1750 | //\r | |
1751 | Op1 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
1752 | VmWriteMemN (VmPtr, (UINTN) Op1, (UINTN) Op2);\r | |
1753 | }\r | |
1754 | //\r | |
1755 | // Advance the instruction pointer\r | |
1756 | //\r | |
1757 | VmPtr->Ip += Size;\r | |
1758 | return EFI_SUCCESS;\r | |
1759 | }\r | |
1760 | \r | |
1761 | STATIC\r | |
1762 | EFI_STATUS\r | |
1763 | ExecuteMOVsnw (\r | |
1764 | IN VM_CONTEXT *VmPtr\r | |
1765 | )\r | |
1766 | /*++\r | |
1767 | \r | |
1768 | Routine Description:\r | |
1769 | \r | |
1770 | Execute the EBC MOVsnw instruction. This instruction loads a signed \r | |
1771 | natural value from memory or register to another memory or register. On\r | |
1772 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
1773 | is a register.\r | |
1774 | \r | |
1775 | Arguments:\r | |
1776 | \r | |
1777 | VmPtr - pointer to a VM context \r | |
1778 | \r | |
1779 | Returns:\r | |
1780 | \r | |
1781 | Standard EFI_STATUS\r | |
1782 | \r | |
1783 | Instruction syntax:\r | |
1784 | \r | |
1785 | MOVsnw {@}R1 {Index16}, {@}R2 {Index16|Immed16}\r | |
1786 | \r | |
1787 | 0:7 1=>operand1 index present\r | |
1788 | 0:6 1=>operand2 index present\r | |
1789 | \r | |
1790 | --*/\r | |
1791 | {\r | |
1792 | UINT8 Opcode;\r | |
1793 | UINT8 Operands;\r | |
1794 | UINT8 Size;\r | |
1795 | INT16 Op1Index;\r | |
1796 | INT16 Op2Index;\r | |
1797 | UINT64 Op2;\r | |
1798 | \r | |
1799 | //\r | |
1800 | // Get the opcode and operand bytes\r | |
1801 | //\r | |
1802 | Opcode = GETOPCODE (VmPtr);\r | |
1803 | Operands = GETOPERANDS (VmPtr);\r | |
1804 | \r | |
1805 | Op1Index = Op2Index = 0;\r | |
1806 | \r | |
1807 | //\r | |
1808 | // Get the indexes if present.\r | |
1809 | //\r | |
1810 | Size = 2;\r | |
1811 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
1812 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1813 | Op1Index = VmReadIndex16 (VmPtr, 2);\r | |
1814 | } else {\r | |
1815 | //\r | |
1816 | // Illegal form operand1 direct with index: MOVsnw R1 Index16, {@}R2\r | |
1817 | //\r | |
1818 | EbcDebugSignalException (\r | |
1819 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1820 | EXCEPTION_FLAG_FATAL,\r | |
1821 | VmPtr\r | |
1822 | );\r | |
1823 | return EFI_UNSUPPORTED;\r | |
1824 | }\r | |
1825 | \r | |
1826 | Size += sizeof (UINT16);\r | |
1827 | }\r | |
1828 | \r | |
1829 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
1830 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1831 | Op2Index = VmReadIndex16 (VmPtr, Size);\r | |
1832 | } else {\r | |
1833 | Op2Index = VmReadImmed16 (VmPtr, Size);\r | |
1834 | }\r | |
1835 | \r | |
1836 | Size += sizeof (UINT16);\r | |
1837 | }\r | |
1838 | //\r | |
1839 | // Get the data from the source.\r | |
1840 | //\r | |
1841 | Op2 = (INT64) ((INTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Op2Index));\r | |
1842 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1843 | Op2 = (INT64) (INTN) VmReadMemN (VmPtr, (UINTN) Op2);\r | |
1844 | }\r | |
1845 | //\r | |
1846 | // Now write back the result.\r | |
1847 | //\r | |
1848 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1849 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Op2;\r | |
1850 | } else {\r | |
1851 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Op1Index), (UINTN) Op2);\r | |
1852 | }\r | |
1853 | //\r | |
1854 | // Advance the instruction pointer\r | |
1855 | //\r | |
1856 | VmPtr->Ip += Size;\r | |
1857 | return EFI_SUCCESS;\r | |
1858 | }\r | |
1859 | \r | |
1860 | STATIC\r | |
1861 | EFI_STATUS\r | |
1862 | ExecuteMOVsnd (\r | |
1863 | IN VM_CONTEXT *VmPtr\r | |
1864 | )\r | |
1865 | /*++\r | |
1866 | \r | |
1867 | Routine Description:\r | |
1868 | \r | |
1869 | Execute the EBC MOVsnw instruction. This instruction loads a signed \r | |
1870 | natural value from memory or register to another memory or register. On\r | |
1871 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
1872 | is a register.\r | |
1873 | \r | |
1874 | Arguments:\r | |
1875 | \r | |
1876 | VmPtr - pointer to a VM context \r | |
1877 | \r | |
1878 | Returns:\r | |
1879 | \r | |
1880 | Standard EFI_STATUS\r | |
1881 | \r | |
1882 | Instruction syntax:\r | |
1883 | \r | |
1884 | MOVsnd {@}R1 {Indx32}, {@}R2 {Index32|Immed32}\r | |
1885 | \r | |
1886 | 0:7 1=>operand1 index present\r | |
1887 | 0:6 1=>operand2 index present\r | |
1888 | \r | |
1889 | --*/\r | |
1890 | {\r | |
1891 | UINT8 Opcode;\r | |
1892 | UINT8 Operands;\r | |
1893 | UINT8 Size;\r | |
1894 | INT32 Op1Index;\r | |
1895 | INT32 Op2Index;\r | |
1896 | UINT64 Op2;\r | |
1897 | \r | |
1898 | //\r | |
1899 | // Get the opcode and operand bytes\r | |
1900 | //\r | |
1901 | Opcode = GETOPCODE (VmPtr);\r | |
1902 | Operands = GETOPERANDS (VmPtr);\r | |
1903 | \r | |
1904 | Op1Index = Op2Index = 0;\r | |
1905 | \r | |
1906 | //\r | |
1907 | // Get the indexes if present.\r | |
1908 | //\r | |
1909 | Size = 2;\r | |
1910 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
1911 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1912 | Op1Index = VmReadIndex32 (VmPtr, 2);\r | |
1913 | } else {\r | |
1914 | //\r | |
1915 | // Illegal form operand1 direct with index: MOVsnd R1 Index16,..\r | |
1916 | //\r | |
1917 | EbcDebugSignalException (\r | |
1918 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1919 | EXCEPTION_FLAG_FATAL,\r | |
1920 | VmPtr\r | |
1921 | );\r | |
1922 | return EFI_UNSUPPORTED;\r | |
1923 | }\r | |
1924 | \r | |
1925 | Size += sizeof (UINT32);\r | |
1926 | }\r | |
1927 | \r | |
1928 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
1929 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1930 | Op2Index = VmReadIndex32 (VmPtr, Size);\r | |
1931 | } else {\r | |
1932 | Op2Index = VmReadImmed32 (VmPtr, Size);\r | |
1933 | }\r | |
1934 | \r | |
1935 | Size += sizeof (UINT32);\r | |
1936 | }\r | |
1937 | //\r | |
1938 | // Get the data from the source.\r | |
1939 | //\r | |
1940 | Op2 = (INT64) ((INTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Op2Index));\r | |
1941 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1942 | Op2 = (INT64) (INTN) VmReadMemN (VmPtr, (UINTN) Op2);\r | |
1943 | }\r | |
1944 | //\r | |
1945 | // Now write back the result.\r | |
1946 | //\r | |
1947 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1948 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Op2;\r | |
1949 | } else {\r | |
1950 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Op1Index), (UINTN) Op2);\r | |
1951 | }\r | |
1952 | //\r | |
1953 | // Advance the instruction pointer\r | |
1954 | //\r | |
1955 | VmPtr->Ip += Size;\r | |
1956 | return EFI_SUCCESS;\r | |
1957 | }\r | |
1958 | \r | |
1959 | STATIC\r | |
1960 | EFI_STATUS\r | |
1961 | ExecutePUSHn (\r | |
1962 | IN VM_CONTEXT *VmPtr\r | |
1963 | )\r | |
1964 | /*++\r | |
1965 | \r | |
1966 | Routine Description:\r | |
1967 | Execute the EBC PUSHn instruction\r | |
1968 | \r | |
1969 | Arguments:\r | |
1970 | VmPtr - pointer to a VM context \r | |
1971 | \r | |
1972 | Returns:\r | |
1973 | Standard EFI_STATUS\r | |
1974 | \r | |
1975 | Instruction syntax:\r | |
1976 | PUSHn {@}R1 {Index16|Immed16}\r | |
1977 | \r | |
1978 | --*/\r | |
1979 | {\r | |
1980 | UINT8 Opcode;\r | |
1981 | UINT8 Operands;\r | |
1982 | INT16 Index16;\r | |
1983 | UINTN DataN;\r | |
1984 | \r | |
1985 | //\r | |
1986 | // Get opcode and operands\r | |
1987 | //\r | |
1988 | Opcode = GETOPCODE (VmPtr);\r | |
1989 | Operands = GETOPERANDS (VmPtr);\r | |
1990 | \r | |
1991 | //\r | |
1992 | // Get index if present\r | |
1993 | //\r | |
1994 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
1995 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1996 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1997 | } else {\r | |
1998 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
1999 | }\r | |
2000 | \r | |
2001 | VmPtr->Ip += 4;\r | |
2002 | } else {\r | |
2003 | Index16 = 0;\r | |
2004 | VmPtr->Ip += 2;\r | |
2005 | }\r | |
2006 | //\r | |
2007 | // Get the data to push\r | |
2008 | //\r | |
2009 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2010 | DataN = VmReadMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2011 | } else {\r | |
2012 | DataN = (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16);\r | |
2013 | }\r | |
2014 | //\r | |
2015 | // Adjust the stack down.\r | |
2016 | //\r | |
2017 | VmPtr->R[0] -= sizeof (UINTN);\r | |
2018 | VmWriteMemN (VmPtr, (UINTN) VmPtr->R[0], DataN);\r | |
2019 | return EFI_SUCCESS;\r | |
2020 | }\r | |
2021 | \r | |
2022 | STATIC\r | |
2023 | EFI_STATUS\r | |
2024 | ExecutePUSH (\r | |
2025 | IN VM_CONTEXT *VmPtr\r | |
2026 | )\r | |
2027 | /*++\r | |
2028 | \r | |
2029 | Routine Description:\r | |
2030 | Execute the EBC PUSH instruction\r | |
2031 | \r | |
2032 | Arguments:\r | |
2033 | VmPtr - pointer to a VM context \r | |
2034 | \r | |
2035 | Returns:\r | |
2036 | Standard EFI_STATUS\r | |
2037 | \r | |
2038 | Instruction syntax:\r | |
2039 | PUSH[32|64] {@}R1 {Index16|Immed16}\r | |
2040 | \r | |
2041 | --*/\r | |
2042 | {\r | |
2043 | UINT8 Opcode;\r | |
2044 | UINT8 Operands;\r | |
2045 | UINT32 Data32;\r | |
2046 | UINT64 Data64;\r | |
2047 | INT16 Index16;\r | |
2048 | \r | |
2049 | //\r | |
2050 | // Get opcode and operands\r | |
2051 | //\r | |
2052 | Opcode = GETOPCODE (VmPtr);\r | |
2053 | Operands = GETOPERANDS (VmPtr);\r | |
2054 | //\r | |
2055 | // Get immediate index if present, then advance the IP.\r | |
2056 | //\r | |
2057 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
2058 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2059 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2060 | } else {\r | |
2061 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2062 | }\r | |
2063 | \r | |
2064 | VmPtr->Ip += 4;\r | |
2065 | } else {\r | |
2066 | Index16 = 0;\r | |
2067 | VmPtr->Ip += 2;\r | |
2068 | }\r | |
2069 | //\r | |
2070 | // Get the data to push\r | |
2071 | //\r | |
2072 | if (Opcode & PUSHPOP_M_64) {\r | |
2073 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2074 | Data64 = VmReadMem64 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2075 | } else {\r | |
2076 | Data64 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2077 | }\r | |
2078 | //\r | |
2079 | // Adjust the stack down, then write back the data\r | |
2080 | //\r | |
2081 | VmPtr->R[0] -= sizeof (UINT64);\r | |
2082 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[0], Data64);\r | |
2083 | } else {\r | |
2084 | //\r | |
2085 | // 32-bit data\r | |
2086 | //\r | |
2087 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2088 | Data32 = VmReadMem32 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2089 | } else {\r | |
2090 | Data32 = (UINT32) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2091 | }\r | |
2092 | //\r | |
2093 | // Adjust the stack down and write the data\r | |
2094 | //\r | |
2095 | VmPtr->R[0] -= sizeof (UINT32);\r | |
2096 | VmWriteMem32 (VmPtr, (UINTN) VmPtr->R[0], Data32);\r | |
2097 | }\r | |
2098 | \r | |
2099 | return EFI_SUCCESS;\r | |
2100 | }\r | |
2101 | \r | |
2102 | STATIC\r | |
2103 | EFI_STATUS\r | |
2104 | ExecutePOPn (\r | |
2105 | IN VM_CONTEXT *VmPtr\r | |
2106 | )\r | |
2107 | /*++\r | |
2108 | \r | |
2109 | Routine Description:\r | |
2110 | Execute the EBC POPn instruction\r | |
2111 | \r | |
2112 | Arguments:\r | |
2113 | VmPtr - pointer to a VM context \r | |
2114 | \r | |
2115 | Returns:\r | |
2116 | Standard EFI_STATUS\r | |
2117 | \r | |
2118 | Instruction syntax:\r | |
2119 | POPn {@}R1 {Index16|Immed16}\r | |
2120 | \r | |
2121 | --*/\r | |
2122 | {\r | |
2123 | UINT8 Opcode;\r | |
2124 | UINT8 Operands;\r | |
2125 | INT16 Index16;\r | |
2126 | UINTN DataN;\r | |
2127 | \r | |
2128 | //\r | |
2129 | // Get opcode and operands\r | |
2130 | //\r | |
2131 | Opcode = GETOPCODE (VmPtr);\r | |
2132 | Operands = GETOPERANDS (VmPtr);\r | |
2133 | //\r | |
2134 | // Get immediate data if present, and advance the IP\r | |
2135 | //\r | |
2136 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
2137 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2138 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2139 | } else {\r | |
2140 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2141 | }\r | |
2142 | \r | |
2143 | VmPtr->Ip += 4;\r | |
2144 | } else {\r | |
2145 | Index16 = 0;\r | |
2146 | VmPtr->Ip += 2;\r | |
2147 | }\r | |
2148 | //\r | |
2149 | // Read the data off the stack, then adjust the stack pointer\r | |
2150 | //\r | |
2151 | DataN = VmReadMemN (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2152 | VmPtr->R[0] += sizeof (UINTN);\r | |
2153 | //\r | |
2154 | // Do the write-back\r | |
2155 | //\r | |
2156 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2157 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16), DataN);\r | |
2158 | } else {\r | |
2159 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (INT64) (UINT64) ((UINTN) DataN + Index16);\r | |
2160 | }\r | |
2161 | \r | |
2162 | return EFI_SUCCESS;\r | |
2163 | }\r | |
2164 | \r | |
2165 | STATIC\r | |
2166 | EFI_STATUS\r | |
2167 | ExecutePOP (\r | |
2168 | IN VM_CONTEXT *VmPtr\r | |
2169 | )\r | |
2170 | /*++\r | |
2171 | \r | |
2172 | Routine Description:\r | |
2173 | Execute the EBC POP instruction\r | |
2174 | \r | |
2175 | Arguments:\r | |
2176 | VmPtr - pointer to a VM context \r | |
2177 | \r | |
2178 | Returns:\r | |
2179 | Standard EFI_STATUS\r | |
2180 | \r | |
2181 | Instruction syntax:\r | |
2182 | POP {@}R1 {Index16|Immed16}\r | |
2183 | \r | |
2184 | --*/\r | |
2185 | {\r | |
2186 | UINT8 Opcode;\r | |
2187 | UINT8 Operands;\r | |
2188 | INT16 Index16;\r | |
2189 | INT32 Data32;\r | |
2190 | UINT64 Data64;\r | |
2191 | \r | |
2192 | //\r | |
2193 | // Get opcode and operands\r | |
2194 | //\r | |
2195 | Opcode = GETOPCODE (VmPtr);\r | |
2196 | Operands = GETOPERANDS (VmPtr);\r | |
2197 | //\r | |
2198 | // Get immediate data if present, and advance the IP.\r | |
2199 | //\r | |
2200 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
2201 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2202 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2203 | } else {\r | |
2204 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2205 | }\r | |
2206 | \r | |
2207 | VmPtr->Ip += 4;\r | |
2208 | } else {\r | |
2209 | Index16 = 0;\r | |
2210 | VmPtr->Ip += 2;\r | |
2211 | }\r | |
2212 | //\r | |
2213 | // Get the data off the stack, then write it to the appropriate location\r | |
2214 | //\r | |
2215 | if (Opcode & PUSHPOP_M_64) {\r | |
2216 | //\r | |
2217 | // Read the data off the stack, then adjust the stack pointer\r | |
2218 | //\r | |
2219 | Data64 = VmReadMem64 (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2220 | VmPtr->R[0] += sizeof (UINT64);\r | |
2221 | //\r | |
2222 | // Do the write-back\r | |
2223 | //\r | |
2224 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2225 | VmWriteMem64 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16), Data64);\r | |
2226 | } else {\r | |
2227 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Data64 + Index16;\r | |
2228 | }\r | |
2229 | } else {\r | |
2230 | //\r | |
2231 | // 32-bit pop. Read it off the stack and adjust the stack pointer\r | |
2232 | //\r | |
2233 | Data32 = (INT32) VmReadMem32 (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2234 | VmPtr->R[0] += sizeof (UINT32);\r | |
2235 | //\r | |
2236 | // Do the write-back\r | |
2237 | //\r | |
2238 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2239 | VmWriteMem32 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16), Data32);\r | |
2240 | } else {\r | |
2241 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (INT64) Data32 + Index16;\r | |
2242 | }\r | |
2243 | }\r | |
2244 | \r | |
2245 | return EFI_SUCCESS;\r | |
2246 | }\r | |
2247 | \r | |
2248 | STATIC\r | |
2249 | EFI_STATUS\r | |
2250 | ExecuteCALL (\r | |
2251 | IN VM_CONTEXT *VmPtr\r | |
2252 | )\r | |
2253 | /*++\r | |
2254 | \r | |
2255 | Routine Description:\r | |
2256 | Implements the EBC CALL instruction.\r | |
2257 | \r | |
2258 | Instruction format: \r | |
2259 | \r | |
2260 | CALL64 Immed64\r | |
2261 | CALL32 {@}R1 {Immed32|Index32}\r | |
2262 | CALLEX64 Immed64\r | |
2263 | CALLEX16 {@}R1 {Immed32}\r | |
2264 | \r | |
2265 | If Rx == R0, then it's a PC relative call to PC = PC + imm32.\r | |
2266 | \r | |
2267 | Arguments:\r | |
2268 | VmPtr - pointer to a VM context.\r | |
2269 | \r | |
2270 | Returns:\r | |
2271 | Standard EFI_STATUS\r | |
2272 | \r | |
2273 | --*/\r | |
2274 | {\r | |
2275 | UINT8 Opcode;\r | |
2276 | UINT8 Operands;\r | |
2277 | INT32 Immed32;\r | |
2278 | UINT8 Size;\r | |
2279 | INT64 Immed64;\r | |
2280 | VOID *FramePtr;\r | |
2281 | \r | |
2282 | //\r | |
2283 | // Get opcode and operands\r | |
2284 | //\r | |
2285 | Opcode = GETOPCODE (VmPtr);\r | |
2286 | Operands = GETOPERANDS (VmPtr);\r | |
2287 | //\r | |
2288 | // Assign these as well to avoid compiler warnings\r | |
2289 | //\r | |
2290 | Immed64 = 0;\r | |
2291 | Immed32 = 0;\r | |
2292 | \r | |
2293 | FramePtr = VmPtr->FramePtr;\r | |
2294 | //\r | |
2295 | // Determine the instruction size, and get immediate data if present\r | |
2296 | //\r | |
2297 | if (Opcode & OPCODE_M_IMMDATA) {\r | |
2298 | if (Opcode & OPCODE_M_IMMDATA64) {\r | |
2299 | Immed64 = VmReadImmed64 (VmPtr, 2);\r | |
2300 | Size = 10;\r | |
2301 | } else {\r | |
2302 | //\r | |
2303 | // If register operand is indirect, then the immediate data is an index\r | |
2304 | //\r | |
2305 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2306 | Immed32 = VmReadIndex32 (VmPtr, 2);\r | |
2307 | } else {\r | |
2308 | Immed32 = VmReadImmed32 (VmPtr, 2);\r | |
2309 | }\r | |
2310 | \r | |
2311 | Size = 6;\r | |
2312 | }\r | |
2313 | } else {\r | |
2314 | Size = 2;\r | |
2315 | }\r | |
2316 | //\r | |
2317 | // If it's a call to EBC, adjust the stack pointer down 16 bytes and\r | |
2318 | // put our return address and frame pointer on the VM stack.\r | |
2319 | //\r | |
2320 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
2321 | VmPtr->R[0] -= 8;\r | |
2322 | VmWriteMemN (VmPtr, (UINTN) VmPtr->R[0], (UINTN) FramePtr);\r | |
2323 | VmPtr->FramePtr = (VOID *) (UINTN) VmPtr->R[0];\r | |
2324 | VmPtr->R[0] -= 8;\r | |
2325 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[0], (UINT64) (UINTN) (VmPtr->Ip + Size));\r | |
2326 | }\r | |
2327 | //\r | |
2328 | // If 64-bit data, then absolute jump only\r | |
2329 | //\r | |
2330 | if (Opcode & OPCODE_M_IMMDATA64) {\r | |
2331 | //\r | |
2332 | // Native or EBC call?\r | |
2333 | //\r | |
2334 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
2335 | VmPtr->Ip = (VMIP) (UINTN) Immed64;\r | |
2336 | } else {\r | |
2337 | //\r | |
2338 | // Call external function, get the return value, and advance the IP\r | |
2339 | //\r | |
2340 | EbcLLCALLEX (VmPtr, (UINTN) Immed64, (UINTN) VmPtr->R[0], FramePtr, Size);\r | |
2341 | }\r | |
2342 | } else {\r | |
2343 | //\r | |
2344 | // Get the register data. If operand1 == 0, then ignore register and\r | |
2345 | // take immediate data as relative or absolute address.\r | |
2346 | // Compiler should take care of upper bits if 32-bit machine.\r | |
2347 | //\r | |
2348 | if (OPERAND1_REGNUM (Operands) != 0) {\r | |
2349 | Immed64 = (UINT64) (UINTN) VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
2350 | }\r | |
2351 | //\r | |
2352 | // Get final address\r | |
2353 | //\r | |
2354 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2355 | Immed64 = (INT64) (UINT64) (UINTN) VmReadMemN (VmPtr, (UINTN) (Immed64 + Immed32));\r | |
2356 | } else {\r | |
2357 | Immed64 += Immed32;\r | |
2358 | }\r | |
2359 | //\r | |
2360 | // Now determine if external call, and then if relative or absolute\r | |
2361 | //\r | |
2362 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
2363 | //\r | |
2364 | // EBC call. Relative or absolute? If relative, then it's relative to the\r | |
2365 | // start of the next instruction.\r | |
2366 | //\r | |
2367 | if (Operands & OPERAND_M_RELATIVE_ADDR) {\r | |
2368 | VmPtr->Ip += Immed64 + Size;\r | |
2369 | } else {\r | |
2370 | VmPtr->Ip = (VMIP) (UINTN) Immed64;\r | |
2371 | }\r | |
2372 | } else {\r | |
2373 | //\r | |
2374 | // Native call. Relative or absolute?\r | |
2375 | //\r | |
2376 | if (Operands & OPERAND_M_RELATIVE_ADDR) {\r | |
2377 | EbcLLCALLEX (VmPtr, (UINTN) (Immed64 + VmPtr->Ip + Size), (UINTN) VmPtr->R[0], FramePtr, Size);\r | |
2378 | } else {\r | |
2379 | if (VmPtr->StopFlags & STOPFLAG_BREAK_ON_CALLEX) {\r | |
2380 | CpuBreakpoint ();\r | |
2381 | }\r | |
2382 | \r | |
2383 | EbcLLCALLEX (VmPtr, (UINTN) Immed64, (UINTN) VmPtr->R[0], FramePtr, Size);\r | |
2384 | }\r | |
2385 | }\r | |
2386 | }\r | |
2387 | \r | |
2388 | return EFI_SUCCESS;\r | |
2389 | }\r | |
2390 | \r | |
2391 | STATIC\r | |
2392 | EFI_STATUS\r | |
2393 | ExecuteRET (\r | |
2394 | IN VM_CONTEXT *VmPtr\r | |
2395 | )\r | |
2396 | /*++\r | |
2397 | \r | |
2398 | Routine Description:\r | |
2399 | Execute the EBC RET instruction\r | |
2400 | \r | |
2401 | Arguments:\r | |
2402 | VmPtr - pointer to a VM context \r | |
2403 | \r | |
2404 | Returns:\r | |
2405 | Standard EFI_STATUS\r | |
2406 | \r | |
2407 | Instruction syntax:\r | |
2408 | RET\r | |
2409 | \r | |
2410 | --*/\r | |
2411 | {\r | |
2412 | //\r | |
2413 | // If we're at the top of the stack, then simply set the done\r | |
2414 | // flag and return\r | |
2415 | //\r | |
2416 | if (VmPtr->StackRetAddr == (UINT64) VmPtr->R[0]) {\r | |
2417 | VmPtr->StopFlags |= STOPFLAG_APP_DONE;\r | |
2418 | } else {\r | |
2419 | //\r | |
2420 | // Pull the return address off the VM app's stack and set the IP\r | |
2421 | // to it\r | |
2422 | //\r | |
2423 | if (!IS_ALIGNED ((UINTN) VmPtr->R[0], sizeof (UINT16))) {\r | |
2424 | EbcDebugSignalException (\r | |
2425 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
2426 | EXCEPTION_FLAG_FATAL,\r | |
2427 | VmPtr\r | |
2428 | );\r | |
2429 | }\r | |
2430 | //\r | |
2431 | // Restore the IP and frame pointer from the stack\r | |
2432 | //\r | |
2433 | VmPtr->Ip = (VMIP) (UINTN) VmReadMem64 (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2434 | VmPtr->R[0] += 8;\r | |
2435 | VmPtr->FramePtr = (VOID *) VmReadMemN (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2436 | VmPtr->R[0] += 8;\r | |
2437 | }\r | |
2438 | \r | |
2439 | return EFI_SUCCESS;\r | |
2440 | }\r | |
2441 | \r | |
2442 | STATIC\r | |
2443 | EFI_STATUS\r | |
2444 | ExecuteCMP (\r | |
2445 | IN VM_CONTEXT *VmPtr\r | |
2446 | )\r | |
2447 | /*++\r | |
2448 | \r | |
2449 | Routine Description:\r | |
2450 | Execute the EBC CMP instruction\r | |
2451 | \r | |
2452 | Arguments:\r | |
2453 | VmPtr - pointer to a VM context \r | |
2454 | \r | |
2455 | Returns:\r | |
2456 | Standard EFI_STATUS\r | |
2457 | \r | |
2458 | Instruction syntax:\r | |
2459 | CMP[32|64][eq|lte|gte|ulte|ugte] R1, {@}R2 {Index16|Immed16}\r | |
2460 | \r | |
2461 | --*/\r | |
2462 | {\r | |
2463 | UINT8 Opcode;\r | |
2464 | UINT8 Operands;\r | |
2465 | UINT8 Size;\r | |
2466 | INT16 Index16;\r | |
2467 | UINT32 Flag;\r | |
2468 | INT64 Op2;\r | |
2469 | INT64 Op1;\r | |
2470 | \r | |
2471 | //\r | |
2472 | // Get opcode and operands\r | |
2473 | //\r | |
2474 | Opcode = GETOPCODE (VmPtr);\r | |
2475 | Operands = GETOPERANDS (VmPtr);\r | |
2476 | //\r | |
2477 | // Get the register data we're going to compare to\r | |
2478 | //\r | |
2479 | Op1 = VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
2480 | //\r | |
2481 | // Get immediate data\r | |
2482 | //\r | |
2483 | if (Opcode & OPCODE_M_IMMDATA) {\r | |
2484 | if (OPERAND2_INDIRECT (Operands)) {\r | |
2485 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2486 | } else {\r | |
2487 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2488 | }\r | |
2489 | \r | |
2490 | Size = 4;\r | |
2491 | } else {\r | |
2492 | Index16 = 0;\r | |
2493 | Size = 2;\r | |
2494 | }\r | |
2495 | //\r | |
2496 | // Now get Op2\r | |
2497 | //\r | |
2498 | if (OPERAND2_INDIRECT (Operands)) {\r | |
2499 | if (Opcode & OPCODE_M_64BIT) {\r | |
2500 | Op2 = (INT64) VmReadMem64 (VmPtr, (UINTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16));\r | |
2501 | } else {\r | |
2502 | //\r | |
2503 | // 32-bit operations. 0-extend the values for all cases.\r | |
2504 | //\r | |
2505 | Op2 = (INT64) (UINT64) ((UINT32) VmReadMem32 (VmPtr, (UINTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16)));\r | |
2506 | }\r | |
2507 | } else {\r | |
2508 | Op2 = VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16;\r | |
2509 | }\r | |
2510 | //\r | |
2511 | // Now do the compare\r | |
2512 | //\r | |
2513 | Flag = 0;\r | |
2514 | if (Opcode & OPCODE_M_64BIT) {\r | |
2515 | //\r | |
2516 | // 64-bit compares\r | |
2517 | //\r | |
2518 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2519 | case OPCODE_CMPEQ:\r | |
2520 | if (Op1 == Op2) {\r | |
2521 | Flag = 1;\r | |
2522 | }\r | |
2523 | break;\r | |
2524 | \r | |
2525 | case OPCODE_CMPLTE:\r | |
2526 | if (Op1 <= Op2) {\r | |
2527 | Flag = 1;\r | |
2528 | }\r | |
2529 | break;\r | |
2530 | \r | |
2531 | case OPCODE_CMPGTE:\r | |
2532 | if (Op1 >= Op2) {\r | |
2533 | Flag = 1;\r | |
2534 | }\r | |
2535 | break;\r | |
2536 | \r | |
2537 | case OPCODE_CMPULTE:\r | |
2538 | if ((UINT64) Op1 <= (UINT64) Op2) {\r | |
2539 | Flag = 1;\r | |
2540 | }\r | |
2541 | break;\r | |
2542 | \r | |
2543 | case OPCODE_CMPUGTE:\r | |
2544 | if ((UINT64) Op1 >= (UINT64) Op2) {\r | |
2545 | Flag = 1;\r | |
2546 | }\r | |
2547 | break;\r | |
2548 | \r | |
2549 | default:\r | |
2550 | ASSERT (0);\r | |
2551 | }\r | |
2552 | } else {\r | |
2553 | //\r | |
2554 | // 32-bit compares\r | |
2555 | //\r | |
2556 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2557 | case OPCODE_CMPEQ:\r | |
2558 | if ((INT32) Op1 == (INT32) Op2) {\r | |
2559 | Flag = 1;\r | |
2560 | }\r | |
2561 | break;\r | |
2562 | \r | |
2563 | case OPCODE_CMPLTE:\r | |
2564 | if ((INT32) Op1 <= (INT32) Op2) {\r | |
2565 | Flag = 1;\r | |
2566 | }\r | |
2567 | break;\r | |
2568 | \r | |
2569 | case OPCODE_CMPGTE:\r | |
2570 | if ((INT32) Op1 >= (INT32) Op2) {\r | |
2571 | Flag = 1;\r | |
2572 | }\r | |
2573 | break;\r | |
2574 | \r | |
2575 | case OPCODE_CMPULTE:\r | |
2576 | if ((UINT32) Op1 <= (UINT32) Op2) {\r | |
2577 | Flag = 1;\r | |
2578 | }\r | |
2579 | break;\r | |
2580 | \r | |
2581 | case OPCODE_CMPUGTE:\r | |
2582 | if ((UINT32) Op1 >= (UINT32) Op2) {\r | |
2583 | Flag = 1;\r | |
2584 | }\r | |
2585 | break;\r | |
2586 | \r | |
2587 | default:\r | |
2588 | ASSERT (0);\r | |
2589 | }\r | |
2590 | }\r | |
2591 | //\r | |
2592 | // Now set the flag accordingly for the comparison\r | |
2593 | //\r | |
2594 | if (Flag) {\r | |
2595 | VMFLAG_SET (VmPtr, VMFLAGS_CC);\r | |
2596 | } else {\r | |
2597 | VMFLAG_CLEAR (VmPtr, VMFLAGS_CC);\r | |
2598 | }\r | |
2599 | //\r | |
2600 | // Advance the IP\r | |
2601 | //\r | |
2602 | VmPtr->Ip += Size;\r | |
2603 | return EFI_SUCCESS;\r | |
2604 | }\r | |
2605 | \r | |
2606 | STATIC\r | |
2607 | EFI_STATUS\r | |
2608 | ExecuteCMPI (\r | |
2609 | IN VM_CONTEXT *VmPtr\r | |
2610 | )\r | |
2611 | /*++\r | |
2612 | \r | |
2613 | Routine Description:\r | |
2614 | Execute the EBC CMPI instruction\r | |
2615 | \r | |
2616 | Arguments:\r | |
2617 | VmPtr - pointer to a VM context \r | |
2618 | \r | |
2619 | Returns:\r | |
2620 | Standard EFI_STATUS\r | |
2621 | \r | |
2622 | Instruction syntax:\r | |
2623 | CMPI[32|64]{w|d}[eq|lte|gte|ulte|ugte] {@}Rx {Index16}, Immed16|Immed32\r | |
2624 | \r | |
2625 | --*/\r | |
2626 | {\r | |
2627 | UINT8 Opcode;\r | |
2628 | UINT8 Operands;\r | |
2629 | UINT8 Size;\r | |
2630 | INT64 Op1;\r | |
2631 | INT64 Op2;\r | |
2632 | INT16 Index16;\r | |
2633 | UINT32 Flag;\r | |
2634 | \r | |
2635 | //\r | |
2636 | // Get opcode and operands\r | |
2637 | //\r | |
2638 | Opcode = GETOPCODE (VmPtr);\r | |
2639 | Operands = GETOPERANDS (VmPtr);\r | |
2640 | \r | |
2641 | //\r | |
2642 | // Get operand1 index if present\r | |
2643 | //\r | |
2644 | Size = 2;\r | |
2645 | if (Operands & OPERAND_M_CMPI_INDEX) {\r | |
2646 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2647 | Size += 2;\r | |
2648 | } else {\r | |
2649 | Index16 = 0;\r | |
2650 | }\r | |
2651 | //\r | |
2652 | // Get operand1 data we're going to compare to\r | |
2653 | //\r | |
2654 | Op1 = (INT64) VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
2655 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2656 | //\r | |
2657 | // Indirect operand1. Fetch 32 or 64-bit value based on compare size.\r | |
2658 | //\r | |
2659 | if (Opcode & OPCODE_M_CMPI64) {\r | |
2660 | Op1 = (INT64) VmReadMem64 (VmPtr, (UINTN) Op1 + Index16);\r | |
2661 | } else {\r | |
2662 | Op1 = (INT64) VmReadMem32 (VmPtr, (UINTN) Op1 + Index16);\r | |
2663 | }\r | |
2664 | } else {\r | |
2665 | //\r | |
2666 | // Better not have been an index with direct. That is, CMPI R1 Index,...\r | |
2667 | // is illegal.\r | |
2668 | //\r | |
2669 | if (Operands & OPERAND_M_CMPI_INDEX) {\r | |
2670 | EbcDebugSignalException (\r | |
2671 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2672 | EXCEPTION_FLAG_ERROR,\r | |
2673 | VmPtr\r | |
2674 | );\r | |
2675 | VmPtr->Ip += Size;\r | |
2676 | return EFI_UNSUPPORTED;\r | |
2677 | }\r | |
2678 | }\r | |
2679 | //\r | |
2680 | // Get immediate data -- 16- or 32-bit sign extended\r | |
2681 | //\r | |
2682 | if (Opcode & OPCODE_M_CMPI32_DATA) {\r | |
2683 | Op2 = (INT64) VmReadImmed32 (VmPtr, Size);\r | |
2684 | Size += 4;\r | |
2685 | } else {\r | |
2686 | //\r | |
2687 | // 16-bit immediate data. Sign extend always.\r | |
2688 | //\r | |
2689 | Op2 = (INT64) ((INT16) VmReadImmed16 (VmPtr, Size));\r | |
2690 | Size += 2;\r | |
2691 | }\r | |
2692 | //\r | |
2693 | // Now do the compare\r | |
2694 | //\r | |
2695 | Flag = 0;\r | |
2696 | if (Opcode & OPCODE_M_CMPI64) {\r | |
2697 | //\r | |
2698 | // 64 bit comparison\r | |
2699 | //\r | |
2700 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2701 | case OPCODE_CMPIEQ:\r | |
2702 | if (Op1 == (INT64) Op2) {\r | |
2703 | Flag = 1;\r | |
2704 | }\r | |
2705 | break;\r | |
2706 | \r | |
2707 | case OPCODE_CMPILTE:\r | |
2708 | if (Op1 <= (INT64) Op2) {\r | |
2709 | Flag = 1;\r | |
2710 | }\r | |
2711 | break;\r | |
2712 | \r | |
2713 | case OPCODE_CMPIGTE:\r | |
2714 | if (Op1 >= (INT64) Op2) {\r | |
2715 | Flag = 1;\r | |
2716 | }\r | |
2717 | break;\r | |
2718 | \r | |
2719 | case OPCODE_CMPIULTE:\r | |
2720 | if ((UINT64) Op1 <= (UINT64) ((UINT32) Op2)) {\r | |
2721 | Flag = 1;\r | |
2722 | }\r | |
2723 | break;\r | |
2724 | \r | |
2725 | case OPCODE_CMPIUGTE:\r | |
2726 | if ((UINT64) Op1 >= (UINT64) ((UINT32) Op2)) {\r | |
2727 | Flag = 1;\r | |
2728 | }\r | |
2729 | break;\r | |
2730 | \r | |
2731 | default:\r | |
2732 | ASSERT (0);\r | |
2733 | }\r | |
2734 | } else {\r | |
2735 | //\r | |
2736 | // 32-bit comparisons\r | |
2737 | //\r | |
2738 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2739 | case OPCODE_CMPIEQ:\r | |
2740 | if ((INT32) Op1 == Op2) {\r | |
2741 | Flag = 1;\r | |
2742 | }\r | |
2743 | break;\r | |
2744 | \r | |
2745 | case OPCODE_CMPILTE:\r | |
2746 | if ((INT32) Op1 <= Op2) {\r | |
2747 | Flag = 1;\r | |
2748 | }\r | |
2749 | break;\r | |
2750 | \r | |
2751 | case OPCODE_CMPIGTE:\r | |
2752 | if ((INT32) Op1 >= Op2) {\r | |
2753 | Flag = 1;\r | |
2754 | }\r | |
2755 | break;\r | |
2756 | \r | |
2757 | case OPCODE_CMPIULTE:\r | |
2758 | if ((UINT32) Op1 <= (UINT32) Op2) {\r | |
2759 | Flag = 1;\r | |
2760 | }\r | |
2761 | break;\r | |
2762 | \r | |
2763 | case OPCODE_CMPIUGTE:\r | |
2764 | if ((UINT32) Op1 >= (UINT32) Op2) {\r | |
2765 | Flag = 1;\r | |
2766 | }\r | |
2767 | break;\r | |
2768 | \r | |
2769 | default:\r | |
2770 | ASSERT (0);\r | |
2771 | }\r | |
2772 | }\r | |
2773 | //\r | |
2774 | // Now set the flag accordingly for the comparison\r | |
2775 | //\r | |
2776 | if (Flag) {\r | |
2777 | VMFLAG_SET (VmPtr, VMFLAGS_CC);\r | |
2778 | } else {\r | |
2779 | VMFLAG_CLEAR (VmPtr, VMFLAGS_CC);\r | |
2780 | }\r | |
2781 | //\r | |
2782 | // Advance the IP\r | |
2783 | //\r | |
2784 | VmPtr->Ip += Size;\r | |
2785 | return EFI_SUCCESS;\r | |
2786 | }\r | |
2787 | \r | |
2788 | STATIC\r | |
2789 | UINT64\r | |
2790 | ExecuteNOT (\r | |
2791 | IN VM_CONTEXT *VmPtr,\r | |
2792 | IN UINT64 Op1,\r | |
2793 | IN UINT64 Op2\r | |
2794 | )\r | |
2795 | /*++\r | |
2796 | \r | |
2797 | Routine Description:\r | |
2798 | Execute the EBC NOT instruction\r | |
2799 | \r | |
2800 | Arguments:\r | |
2801 | VmPtr - pointer to a VM context \r | |
2802 | Op1 - Operand 1 from the instruction \r | |
2803 | Op2 - Operand 2 from the instruction\r | |
2804 | \r | |
2805 | Returns:\r | |
2806 | ~Op2\r | |
2807 | \r | |
2808 | Instruction syntax:\r | |
2809 | NOT[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2810 | \r | |
2811 | --*/\r | |
2812 | {\r | |
2813 | return ~Op2;\r | |
2814 | }\r | |
2815 | \r | |
2816 | STATIC\r | |
2817 | UINT64\r | |
2818 | ExecuteNEG (\r | |
2819 | IN VM_CONTEXT *VmPtr,\r | |
2820 | IN UINT64 Op1,\r | |
2821 | IN UINT64 Op2\r | |
2822 | )\r | |
2823 | /*++\r | |
2824 | \r | |
2825 | Routine Description:\r | |
2826 | Execute the EBC NEG instruction\r | |
2827 | \r | |
2828 | Arguments:\r | |
2829 | VmPtr - pointer to a VM context \r | |
2830 | Op1 - Operand 1 from the instruction \r | |
2831 | Op2 - Operand 2 from the instruction\r | |
2832 | \r | |
2833 | Returns:\r | |
2834 | Op2 * -1\r | |
2835 | \r | |
2836 | Instruction syntax:\r | |
2837 | NEG[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2838 | \r | |
2839 | --*/\r | |
2840 | {\r | |
2841 | return ~Op2 + 1;\r | |
2842 | }\r | |
2843 | \r | |
2844 | STATIC\r | |
2845 | UINT64\r | |
2846 | ExecuteADD (\r | |
2847 | IN VM_CONTEXT *VmPtr,\r | |
2848 | IN UINT64 Op1,\r | |
2849 | IN UINT64 Op2\r | |
2850 | )\r | |
2851 | /*++\r | |
2852 | \r | |
2853 | Routine Description:\r | |
2854 | \r | |
2855 | Execute the EBC ADD instruction\r | |
2856 | \r | |
2857 | Arguments:\r | |
2858 | VmPtr - pointer to a VM context \r | |
2859 | Op1 - Operand 1 from the instruction \r | |
2860 | Op2 - Operand 2 from the instruction\r | |
2861 | \r | |
2862 | Returns:\r | |
2863 | Op1 + Op2\r | |
2864 | \r | |
2865 | Instruction syntax:\r | |
2866 | ADD[32|64] {@}R1, {@}R2 {Index16}\r | |
2867 | \r | |
2868 | --*/\r | |
2869 | {\r | |
2870 | return Op1 + Op2;\r | |
2871 | }\r | |
2872 | \r | |
2873 | STATIC\r | |
2874 | UINT64\r | |
2875 | ExecuteSUB (\r | |
2876 | IN VM_CONTEXT *VmPtr,\r | |
2877 | IN UINT64 Op1,\r | |
2878 | IN UINT64 Op2\r | |
2879 | )\r | |
2880 | /*++\r | |
2881 | \r | |
2882 | Routine Description:\r | |
2883 | Execute the EBC SUB instruction\r | |
2884 | \r | |
2885 | Arguments:\r | |
2886 | VmPtr - pointer to a VM context \r | |
2887 | Op1 - Operand 1 from the instruction \r | |
2888 | Op2 - Operand 2 from the instruction\r | |
2889 | \r | |
2890 | Returns:\r | |
2891 | Op1 - Op2\r | |
2892 | Standard EFI_STATUS\r | |
2893 | \r | |
2894 | Instruction syntax:\r | |
2895 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2896 | \r | |
2897 | --*/\r | |
2898 | {\r | |
2899 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
2900 | return (UINT64) ((INT64) ((INT64) Op1 - (INT64) Op2));\r | |
2901 | } else {\r | |
2902 | return (UINT64) ((INT64) ((INT32) Op1 - (INT32) Op2));\r | |
2903 | }\r | |
2904 | }\r | |
2905 | \r | |
2906 | STATIC\r | |
2907 | UINT64\r | |
2908 | ExecuteMUL (\r | |
2909 | IN VM_CONTEXT *VmPtr,\r | |
2910 | IN UINT64 Op1,\r | |
2911 | IN UINT64 Op2\r | |
2912 | )\r | |
2913 | /*++\r | |
2914 | \r | |
2915 | Routine Description:\r | |
2916 | \r | |
2917 | Execute the EBC MUL instruction\r | |
2918 | \r | |
2919 | Arguments:\r | |
2920 | VmPtr - pointer to a VM context \r | |
2921 | Op1 - Operand 1 from the instruction \r | |
2922 | Op2 - Operand 2 from the instruction\r | |
2923 | \r | |
2924 | Returns:\r | |
2925 | Op1 * Op2\r | |
2926 | \r | |
2927 | Instruction syntax:\r | |
2928 | MUL[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2929 | \r | |
2930 | --*/\r | |
2931 | {\r | |
878ddf1f | 2932 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r |
6d7338ae | 2933 | return MultS64x64 ((INT64)Op1, (INT64)Op2);\r |
878ddf1f | 2934 | } else {\r |
2935 | return (UINT64) ((INT64) ((INT32) Op1 * (INT32) Op2));\r | |
2936 | }\r | |
2937 | }\r | |
2938 | \r | |
2939 | STATIC\r | |
2940 | UINT64\r | |
2941 | ExecuteMULU (\r | |
2942 | IN VM_CONTEXT *VmPtr,\r | |
2943 | IN UINT64 Op1,\r | |
2944 | IN UINT64 Op2\r | |
2945 | )\r | |
2946 | /*++\r | |
2947 | \r | |
2948 | Routine Description:\r | |
2949 | Execute the EBC MULU instruction\r | |
2950 | \r | |
2951 | Arguments:\r | |
2952 | VmPtr - pointer to a VM context \r | |
2953 | Op1 - Operand 1 from the instruction \r | |
2954 | Op2 - Operand 2 from the instruction\r | |
2955 | \r | |
2956 | Returns:\r | |
2957 | (unsigned)Op1 * (unsigned)Op2 \r | |
2958 | \r | |
2959 | Instruction syntax:\r | |
2960 | MULU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2961 | \r | |
2962 | --*/\r | |
2963 | {\r | |
878ddf1f | 2964 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r |
6d7338ae | 2965 | return MultU64x64 (Op1, Op2);\r |
878ddf1f | 2966 | } else {\r |
2967 | return (UINT64) ((UINT32) Op1 * (UINT32) Op2);\r | |
2968 | }\r | |
2969 | }\r | |
2970 | \r | |
2971 | STATIC\r | |
2972 | UINT64\r | |
2973 | ExecuteDIV (\r | |
2974 | IN VM_CONTEXT *VmPtr,\r | |
2975 | IN UINT64 Op1,\r | |
2976 | IN UINT64 Op2\r | |
2977 | )\r | |
2978 | /*++\r | |
2979 | \r | |
2980 | Routine Description:\r | |
2981 | \r | |
2982 | Execute the EBC DIV instruction\r | |
2983 | \r | |
2984 | Arguments:\r | |
2985 | VmPtr - pointer to a VM context \r | |
2986 | Op1 - Operand 1 from the instruction \r | |
2987 | Op2 - Operand 2 from the instruction\r | |
2988 | \r | |
2989 | Returns:\r | |
2990 | Op1/Op2\r | |
2991 | \r | |
2992 | Instruction syntax:\r | |
2993 | DIV[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2994 | \r | |
2995 | --*/\r | |
2996 | {\r | |
2997 | INT64 Remainder;\r | |
878ddf1f | 2998 | \r |
2999 | //\r | |
3000 | // Check for divide-by-0\r | |
3001 | //\r | |
3002 | if (Op2 == 0) {\r | |
3003 | EbcDebugSignalException (\r | |
3004 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3005 | EXCEPTION_FLAG_FATAL,\r | |
3006 | VmPtr\r | |
3007 | );\r | |
3008 | \r | |
3009 | return 0;\r | |
3010 | } else {\r | |
3011 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3012 | return (UINT64) (DivS64x64Remainder (Op1, Op2, &Remainder));\r |
878ddf1f | 3013 | } else {\r |
3014 | return (UINT64) ((INT64) ((INT32) Op1 / (INT32) Op2));\r | |
3015 | }\r | |
3016 | }\r | |
3017 | }\r | |
3018 | \r | |
3019 | STATIC\r | |
3020 | UINT64\r | |
3021 | ExecuteDIVU (\r | |
3022 | IN VM_CONTEXT *VmPtr,\r | |
3023 | IN UINT64 Op1,\r | |
3024 | IN UINT64 Op2\r | |
3025 | )\r | |
3026 | /*++\r | |
3027 | \r | |
3028 | Routine Description:\r | |
3029 | Execute the EBC DIVU instruction\r | |
3030 | \r | |
3031 | Arguments:\r | |
3032 | VmPtr - pointer to a VM context \r | |
3033 | Op1 - Operand 1 from the instruction \r | |
3034 | Op2 - Operand 2 from the instruction\r | |
3035 | \r | |
3036 | Returns:\r | |
3037 | (unsigned)Op1 / (unsigned)Op2\r | |
3038 | \r | |
3039 | Instruction syntax:\r | |
3040 | DIVU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3041 | \r | |
3042 | --*/\r | |
3043 | {\r | |
3044 | UINT64 Remainder;\r | |
878ddf1f | 3045 | \r |
3046 | //\r | |
3047 | // Check for divide-by-0\r | |
3048 | //\r | |
3049 | if (Op2 == 0) {\r | |
3050 | EbcDebugSignalException (\r | |
3051 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3052 | EXCEPTION_FLAG_FATAL,\r | |
3053 | VmPtr\r | |
3054 | );\r | |
3055 | return 0;\r | |
3056 | } else {\r | |
3057 | //\r | |
3058 | // Get the destination register\r | |
3059 | //\r | |
3060 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3061 | return (UINT64) (DivU64x64Remainder ((INT64)Op1, (INT64)Op2, &Remainder));\r |
878ddf1f | 3062 | } else {\r |
3063 | return (UINT64) ((UINT32) Op1 / (UINT32) Op2);\r | |
3064 | }\r | |
3065 | }\r | |
3066 | }\r | |
3067 | \r | |
3068 | STATIC\r | |
3069 | UINT64\r | |
3070 | ExecuteMOD (\r | |
3071 | IN VM_CONTEXT *VmPtr,\r | |
3072 | IN UINT64 Op1,\r | |
3073 | IN UINT64 Op2\r | |
3074 | )\r | |
3075 | /*++\r | |
3076 | \r | |
3077 | Routine Description:\r | |
3078 | Execute the EBC MOD instruction\r | |
3079 | \r | |
3080 | Arguments:\r | |
3081 | VmPtr - pointer to a VM context \r | |
3082 | Op1 - Operand 1 from the instruction \r | |
3083 | Op2 - Operand 2 from the instruction\r | |
3084 | \r | |
3085 | Returns:\r | |
3086 | Op1 MODULUS Op2\r | |
3087 | \r | |
3088 | Instruction syntax:\r | |
3089 | MOD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3090 | \r | |
3091 | --*/\r | |
3092 | {\r | |
3093 | INT64 Remainder;\r | |
878ddf1f | 3094 | \r |
3095 | //\r | |
3096 | // Check for divide-by-0\r | |
3097 | //\r | |
3098 | if (Op2 == 0) {\r | |
3099 | EbcDebugSignalException (\r | |
3100 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3101 | EXCEPTION_FLAG_FATAL,\r | |
3102 | VmPtr\r | |
3103 | );\r | |
3104 | return 0;\r | |
3105 | } else {\r | |
6d7338ae | 3106 | DivS64x64Remainder ((INT64)Op1, (INT64)Op2, &Remainder);\r |
878ddf1f | 3107 | return Remainder;\r |
3108 | }\r | |
3109 | }\r | |
3110 | \r | |
3111 | STATIC\r | |
3112 | UINT64\r | |
3113 | ExecuteMODU (\r | |
3114 | IN VM_CONTEXT *VmPtr,\r | |
3115 | IN UINT64 Op1,\r | |
3116 | IN UINT64 Op2\r | |
3117 | )\r | |
3118 | /*++\r | |
3119 | \r | |
3120 | Routine Description:\r | |
3121 | Execute the EBC MODU instruction\r | |
3122 | \r | |
3123 | Arguments:\r | |
3124 | VmPtr - pointer to a VM context \r | |
3125 | Op1 - Operand 1 from the instruction \r | |
3126 | Op2 - Operand 2 from the instruction\r | |
3127 | \r | |
3128 | Returns:\r | |
3129 | Op1 UNSIGNED_MODULUS Op2\r | |
3130 | \r | |
3131 | Instruction syntax:\r | |
3132 | MODU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3133 | \r | |
3134 | --*/\r | |
3135 | {\r | |
3136 | UINT64 Remainder;\r | |
878ddf1f | 3137 | \r |
3138 | //\r | |
3139 | // Check for divide-by-0\r | |
3140 | //\r | |
3141 | if (Op2 == 0) {\r | |
3142 | EbcDebugSignalException (\r | |
3143 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3144 | EXCEPTION_FLAG_FATAL,\r | |
3145 | VmPtr\r | |
3146 | );\r | |
3147 | return 0;\r | |
3148 | } else {\r | |
6d7338ae | 3149 | DivU64x64Remainder (Op1, Op2, &Remainder);\r |
878ddf1f | 3150 | return Remainder;\r |
3151 | }\r | |
3152 | }\r | |
3153 | \r | |
3154 | STATIC\r | |
3155 | UINT64\r | |
3156 | ExecuteAND (\r | |
3157 | IN VM_CONTEXT *VmPtr,\r | |
3158 | IN UINT64 Op1,\r | |
3159 | IN UINT64 Op2\r | |
3160 | )\r | |
3161 | /*++\r | |
3162 | \r | |
3163 | Routine Description:\r | |
3164 | Execute the EBC AND instruction\r | |
3165 | \r | |
3166 | Arguments:\r | |
3167 | VmPtr - pointer to a VM context \r | |
3168 | Op1 - Operand 1 from the instruction \r | |
3169 | Op2 - Operand 2 from the instruction\r | |
3170 | \r | |
3171 | Returns:\r | |
3172 | Op1 AND Op2\r | |
3173 | \r | |
3174 | Instruction syntax:\r | |
3175 | AND[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3176 | \r | |
3177 | --*/\r | |
3178 | {\r | |
3179 | return Op1 & Op2;\r | |
3180 | }\r | |
3181 | \r | |
3182 | STATIC\r | |
3183 | UINT64\r | |
3184 | ExecuteOR (\r | |
3185 | IN VM_CONTEXT *VmPtr,\r | |
3186 | IN UINT64 Op1,\r | |
3187 | IN UINT64 Op2\r | |
3188 | )\r | |
3189 | /*++\r | |
3190 | \r | |
3191 | Routine Description:\r | |
3192 | Execute the EBC OR instruction\r | |
3193 | \r | |
3194 | Arguments:\r | |
3195 | VmPtr - pointer to a VM context \r | |
3196 | Op1 - Operand 1 from the instruction \r | |
3197 | Op2 - Operand 2 from the instruction\r | |
3198 | \r | |
3199 | Returns:\r | |
3200 | Op1 OR Op2\r | |
3201 | \r | |
3202 | Instruction syntax:\r | |
3203 | OR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3204 | \r | |
3205 | --*/\r | |
3206 | {\r | |
3207 | return Op1 | Op2;\r | |
3208 | }\r | |
3209 | \r | |
3210 | STATIC\r | |
3211 | UINT64\r | |
3212 | ExecuteXOR (\r | |
3213 | IN VM_CONTEXT *VmPtr,\r | |
3214 | IN UINT64 Op1,\r | |
3215 | IN UINT64 Op2\r | |
3216 | )\r | |
3217 | /*++\r | |
3218 | \r | |
3219 | Routine Description:\r | |
3220 | Execute the EBC XOR instruction\r | |
3221 | \r | |
3222 | Arguments:\r | |
3223 | VmPtr - pointer to a VM context \r | |
3224 | Op1 - Operand 1 from the instruction \r | |
3225 | Op2 - Operand 2 from the instruction\r | |
3226 | \r | |
3227 | Returns:\r | |
3228 | Op1 XOR Op2\r | |
3229 | \r | |
3230 | Instruction syntax:\r | |
3231 | XOR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3232 | \r | |
3233 | --*/\r | |
3234 | {\r | |
3235 | return Op1 ^ Op2;\r | |
3236 | }\r | |
3237 | \r | |
3238 | STATIC\r | |
3239 | UINT64\r | |
3240 | ExecuteSHL (\r | |
3241 | IN VM_CONTEXT *VmPtr,\r | |
3242 | IN UINT64 Op1,\r | |
3243 | IN UINT64 Op2\r | |
3244 | )\r | |
3245 | /*++\r | |
3246 | \r | |
3247 | Routine Description:\r | |
3248 | \r | |
3249 | Execute the EBC SHL shift left instruction\r | |
3250 | \r | |
3251 | Arguments:\r | |
3252 | VmPtr - pointer to a VM context \r | |
3253 | Op1 - Operand 1 from the instruction \r | |
3254 | Op2 - Operand 2 from the instruction\r | |
3255 | \r | |
3256 | Returns:\r | |
3257 | Op1 << Op2\r | |
3258 | \r | |
3259 | Instruction syntax:\r | |
3260 | SHL[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3261 | \r | |
3262 | --*/\r | |
3263 | {\r | |
3264 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3265 | return LShiftU64 (Op1, (UINTN)Op2);\r |
878ddf1f | 3266 | } else {\r |
3267 | return (UINT64) ((UINT32) ((UINT32) Op1 << (UINT32) Op2));\r | |
3268 | }\r | |
3269 | }\r | |
3270 | \r | |
3271 | STATIC\r | |
3272 | UINT64\r | |
3273 | ExecuteSHR (\r | |
3274 | IN VM_CONTEXT *VmPtr,\r | |
3275 | IN UINT64 Op1,\r | |
3276 | IN UINT64 Op2\r | |
3277 | )\r | |
3278 | /*++\r | |
3279 | \r | |
3280 | Routine Description:\r | |
3281 | Execute the EBC SHR instruction\r | |
3282 | \r | |
3283 | Arguments:\r | |
3284 | VmPtr - pointer to a VM context \r | |
3285 | Op1 - Operand 1 from the instruction \r | |
3286 | Op2 - Operand 2 from the instruction\r | |
3287 | \r | |
3288 | Returns:\r | |
3289 | Op1 >> Op2 (unsigned operands)\r | |
3290 | \r | |
3291 | Instruction syntax:\r | |
3292 | SHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3293 | \r | |
3294 | --*/\r | |
3295 | {\r | |
3296 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3297 | return RShiftU64 (Op1, (UINTN)Op2);\r |
878ddf1f | 3298 | } else {\r |
3299 | return (UINT64) ((UINT32) Op1 >> (UINT32) Op2);\r | |
3300 | }\r | |
3301 | }\r | |
3302 | \r | |
3303 | STATIC\r | |
3304 | UINT64\r | |
3305 | ExecuteASHR (\r | |
3306 | IN VM_CONTEXT *VmPtr,\r | |
3307 | IN UINT64 Op1,\r | |
3308 | IN UINT64 Op2\r | |
3309 | )\r | |
3310 | /*++\r | |
3311 | \r | |
3312 | Routine Description:\r | |
3313 | Execute the EBC ASHR instruction\r | |
3314 | \r | |
3315 | Arguments:\r | |
3316 | VmPtr - pointer to a VM context \r | |
3317 | Op1 - Operand 1 from the instruction \r | |
3318 | Op2 - Operand 2 from the instruction\r | |
3319 | \r | |
3320 | Returns:\r | |
3321 | Op1 >> Op2 (signed)\r | |
3322 | \r | |
3323 | Instruction syntax:\r | |
3324 | ASHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3325 | \r | |
3326 | --*/\r | |
3327 | {\r | |
3328 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3329 | return ARShiftU64 (Op1, (UINTN)Op2);\r |
878ddf1f | 3330 | } else {\r |
3331 | return (UINT64) ((INT64) ((INT32) Op1 >> (UINT32) Op2));\r | |
3332 | }\r | |
3333 | }\r | |
3334 | \r | |
3335 | STATIC\r | |
3336 | UINT64\r | |
3337 | ExecuteEXTNDB (\r | |
3338 | IN VM_CONTEXT *VmPtr,\r | |
3339 | IN UINT64 Op1,\r | |
3340 | IN UINT64 Op2\r | |
3341 | )\r | |
3342 | /*++\r | |
3343 | \r | |
3344 | Routine Description:\r | |
3345 | Execute the EBC EXTNDB instruction to sign-extend a byte value.\r | |
3346 | \r | |
3347 | Arguments:\r | |
3348 | VmPtr - pointer to a VM context \r | |
3349 | Op1 - Operand 1 from the instruction \r | |
3350 | Op2 - Operand 2 from the instruction\r | |
3351 | \r | |
3352 | Returns:\r | |
3353 | (INT64)(INT8)Op2\r | |
3354 | \r | |
3355 | Instruction syntax:\r | |
3356 | EXTNDB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3357 | \r | |
3358 | \r | |
3359 | --*/\r | |
3360 | {\r | |
3361 | INT8 Data8;\r | |
3362 | INT64 Data64;\r | |
3363 | //\r | |
3364 | // Convert to byte, then return as 64-bit signed value to let compiler\r | |
3365 | // sign-extend the value\r | |
3366 | //\r | |
3367 | Data8 = (INT8) Op2;\r | |
3368 | Data64 = (INT64) Data8;\r | |
3369 | \r | |
3370 | return (UINT64) Data64;\r | |
3371 | }\r | |
3372 | \r | |
3373 | STATIC\r | |
3374 | UINT64\r | |
3375 | ExecuteEXTNDW (\r | |
3376 | IN VM_CONTEXT *VmPtr,\r | |
3377 | IN UINT64 Op1,\r | |
3378 | IN UINT64 Op2\r | |
3379 | )\r | |
3380 | /*++\r | |
3381 | \r | |
3382 | Routine Description:\r | |
3383 | Execute the EBC EXTNDW instruction to sign-extend a 16-bit value.\r | |
3384 | \r | |
3385 | Arguments:\r | |
3386 | VmPtr - pointer to a VM context \r | |
3387 | Op1 - Operand 1 from the instruction \r | |
3388 | Op2 - Operand 2 from the instruction\r | |
3389 | \r | |
3390 | Returns:\r | |
3391 | (INT64)(INT16)Op2\r | |
3392 | \r | |
3393 | Instruction syntax:\r | |
3394 | EXTNDW[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3395 | \r | |
3396 | \r | |
3397 | --*/\r | |
3398 | {\r | |
3399 | INT16 Data16;\r | |
3400 | INT64 Data64;\r | |
3401 | //\r | |
3402 | // Convert to word, then return as 64-bit signed value to let compiler\r | |
3403 | // sign-extend the value\r | |
3404 | //\r | |
3405 | Data16 = (INT16) Op2;\r | |
3406 | Data64 = (INT64) Data16;\r | |
3407 | \r | |
3408 | return (UINT64) Data64;\r | |
3409 | }\r | |
3410 | //\r | |
3411 | // Execute the EBC EXTNDD instruction.\r | |
3412 | //\r | |
3413 | // Format: EXTNDD {@}Rx, {@}Ry [Index16|Immed16]\r | |
3414 | // EXTNDD Dest, Source\r | |
3415 | //\r | |
3416 | // Operation: Dest <- SignExtended((DWORD)Source))\r | |
3417 | //\r | |
3418 | STATIC\r | |
3419 | UINT64\r | |
3420 | ExecuteEXTNDD (\r | |
3421 | IN VM_CONTEXT *VmPtr,\r | |
3422 | IN UINT64 Op1,\r | |
3423 | IN UINT64 Op2\r | |
3424 | )\r | |
3425 | /*++\r | |
3426 | \r | |
3427 | Routine Description:\r | |
3428 | Execute the EBC EXTNDD instruction to sign-extend a 32-bit value.\r | |
3429 | \r | |
3430 | Arguments:\r | |
3431 | VmPtr - pointer to a VM context \r | |
3432 | Op1 - Operand 1 from the instruction \r | |
3433 | Op2 - Operand 2 from the instruction\r | |
3434 | \r | |
3435 | Returns:\r | |
3436 | (INT64)(INT32)Op2\r | |
3437 | \r | |
3438 | Instruction syntax:\r | |
3439 | EXTNDD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3440 | \r | |
3441 | \r | |
3442 | --*/\r | |
3443 | {\r | |
3444 | INT32 Data32;\r | |
3445 | INT64 Data64;\r | |
3446 | //\r | |
3447 | // Convert to 32-bit value, then return as 64-bit signed value to let compiler\r | |
3448 | // sign-extend the value\r | |
3449 | //\r | |
3450 | Data32 = (INT32) Op2;\r | |
3451 | Data64 = (INT64) Data32;\r | |
3452 | \r | |
3453 | return (UINT64) Data64;\r | |
3454 | }\r | |
3455 | \r | |
3456 | STATIC\r | |
3457 | EFI_STATUS\r | |
3458 | ExecuteSignedDataManip (\r | |
3459 | IN VM_CONTEXT *VmPtr\r | |
3460 | )\r | |
3461 | {\r | |
3462 | //\r | |
3463 | // Just call the data manipulation function with a flag indicating this\r | |
3464 | // is a signed operation.\r | |
3465 | //\r | |
3466 | return ExecuteDataManip (VmPtr, TRUE);\r | |
3467 | }\r | |
3468 | \r | |
3469 | STATIC\r | |
3470 | EFI_STATUS\r | |
3471 | ExecuteUnsignedDataManip (\r | |
3472 | IN VM_CONTEXT *VmPtr\r | |
3473 | )\r | |
3474 | {\r | |
3475 | //\r | |
3476 | // Just call the data manipulation function with a flag indicating this\r | |
3477 | // is not a signed operation.\r | |
3478 | //\r | |
3479 | return ExecuteDataManip (VmPtr, FALSE);\r | |
3480 | }\r | |
3481 | \r | |
3482 | STATIC\r | |
3483 | EFI_STATUS\r | |
3484 | ExecuteDataManip (\r | |
3485 | IN VM_CONTEXT *VmPtr,\r | |
3486 | IN BOOLEAN IsSignedOp\r | |
3487 | )\r | |
3488 | /*++\r | |
3489 | \r | |
3490 | Routine Description:\r | |
3491 | Execute all the EBC data manipulation instructions. \r | |
3492 | Since the EBC data manipulation instructions all have the same basic form, \r | |
3493 | they can share the code that does the fetch of operands and the write-back\r | |
3494 | of the result. This function performs the fetch of the operands (even if\r | |
3495 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
3496 | appropriate subfunction, then writes back the returned result.\r | |
3497 | \r | |
3498 | Arguments:\r | |
3499 | VmPtr - pointer to VM context\r | |
3500 | \r | |
3501 | Returns:\r | |
3502 | Standard EBC status\r | |
3503 | \r | |
3504 | Format: \r | |
3505 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
3506 | \r | |
3507 | --*/\r | |
3508 | {\r | |
3509 | UINT8 Opcode;\r | |
3510 | INT16 Index16;\r | |
3511 | UINT8 Operands;\r | |
3512 | UINT8 Size;\r | |
3513 | UINT64 Op1;\r | |
3514 | UINT64 Op2;\r | |
3515 | \r | |
3516 | //\r | |
3517 | // Get opcode and operands\r | |
3518 | //\r | |
3519 | Opcode = GETOPCODE (VmPtr);\r | |
3520 | Operands = GETOPERANDS (VmPtr);\r | |
3521 | \r | |
3522 | //\r | |
3523 | // Determine if we have immediate data by the opcode\r | |
3524 | //\r | |
3525 | if (Opcode & DATAMANIP_M_IMMDATA) {\r | |
3526 | //\r | |
3527 | // Index16 if Ry is indirect, or Immed16 if Ry direct.\r | |
3528 | //\r | |
3529 | if (OPERAND2_INDIRECT (Operands)) {\r | |
3530 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
3531 | } else {\r | |
3532 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
3533 | }\r | |
3534 | \r | |
3535 | Size = 4;\r | |
3536 | } else {\r | |
3537 | Index16 = 0;\r | |
3538 | Size = 2;\r | |
3539 | }\r | |
3540 | //\r | |
3541 | // Now get operand2 (source). It's of format {@}R2 {Index16|Immed16}\r | |
3542 | //\r | |
3543 | Op2 = (UINT64) VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16;\r | |
3544 | if (OPERAND2_INDIRECT (Operands)) {\r | |
3545 | //\r | |
3546 | // Indirect form: @R2 Index16. Fetch as 32- or 64-bit data\r | |
3547 | //\r | |
3548 | if (Opcode & DATAMANIP_M_64) {\r | |
3549 | Op2 = VmReadMem64 (VmPtr, (UINTN) Op2);\r | |
3550 | } else {\r | |
3551 | //\r | |
3552 | // Read as signed value where appropriate.\r | |
3553 | //\r | |
3554 | if (IsSignedOp) {\r | |
3555 | Op2 = (UINT64) (INT64) ((INT32) VmReadMem32 (VmPtr, (UINTN) Op2));\r | |
3556 | } else {\r | |
3557 | Op2 = (UINT64) VmReadMem32 (VmPtr, (UINTN) Op2);\r | |
3558 | }\r | |
3559 | }\r | |
3560 | } else {\r | |
3561 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
3562 | if (IsSignedOp) {\r | |
3563 | Op2 = (UINT64) (INT64) ((INT32) Op2);\r | |
3564 | } else {\r | |
3565 | Op2 = (UINT64) ((UINT32) Op2);\r | |
3566 | }\r | |
3567 | }\r | |
3568 | }\r | |
3569 | //\r | |
3570 | // Get operand1 (destination and sometimes also an actual operand)\r | |
3571 | // of form {@}R1\r | |
3572 | //\r | |
3573 | Op1 = VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
3574 | if (OPERAND1_INDIRECT (Operands)) {\r | |
3575 | if (Opcode & DATAMANIP_M_64) {\r | |
3576 | Op1 = VmReadMem64 (VmPtr, (UINTN) Op1);\r | |
3577 | } else {\r | |
3578 | if (IsSignedOp) {\r | |
3579 | Op1 = (UINT64) (INT64) ((INT32) VmReadMem32 (VmPtr, (UINTN) Op1));\r | |
3580 | } else {\r | |
3581 | Op1 = (UINT64) VmReadMem32 (VmPtr, (UINTN) Op1);\r | |
3582 | }\r | |
3583 | }\r | |
3584 | } else {\r | |
3585 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
3586 | if (IsSignedOp) {\r | |
3587 | Op1 = (UINT64) (INT64) ((INT32) Op1);\r | |
3588 | } else {\r | |
3589 | Op1 = (UINT64) ((UINT32) Op1);\r | |
3590 | }\r | |
3591 | }\r | |
3592 | }\r | |
3593 | //\r | |
3594 | // Dispatch to the computation function\r | |
3595 | //\r | |
3596 | if (((Opcode & OPCODE_M_OPCODE) - OPCODE_NOT) >=\r | |
3597 | (sizeof (mDataManipDispatchTable) / sizeof (mDataManipDispatchTable[0]))\r | |
3598 | ) {\r | |
3599 | EbcDebugSignalException (\r | |
3600 | EXCEPT_EBC_INVALID_OPCODE,\r | |
3601 | EXCEPTION_FLAG_ERROR,\r | |
3602 | VmPtr\r | |
3603 | );\r | |
3604 | //\r | |
3605 | // Advance and return\r | |
3606 | //\r | |
3607 | VmPtr->Ip += Size;\r | |
3608 | return EFI_UNSUPPORTED;\r | |
3609 | } else {\r | |
3610 | Op2 = mDataManipDispatchTable[(Opcode & OPCODE_M_OPCODE) - OPCODE_NOT](VmPtr, Op1, Op2);\r | |
3611 | }\r | |
3612 | //\r | |
3613 | // Write back the result.\r | |
3614 | //\r | |
3615 | if (OPERAND1_INDIRECT (Operands)) {\r | |
3616 | Op1 = VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
3617 | if (Opcode & DATAMANIP_M_64) {\r | |
3618 | VmWriteMem64 (VmPtr, (UINTN) Op1, Op2);\r | |
3619 | } else {\r | |
3620 | VmWriteMem32 (VmPtr, (UINTN) Op1, (UINT32) Op2);\r | |
3621 | }\r | |
3622 | } else {\r | |
3623 | //\r | |
3624 | // Storage back to a register. Write back, clearing upper bits (as per\r | |
3625 | // the specification) if 32-bit operation.\r | |
3626 | //\r | |
3627 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Op2;\r | |
3628 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
3629 | VmPtr->R[OPERAND1_REGNUM (Operands)] &= 0xFFFFFFFF;\r | |
3630 | }\r | |
3631 | }\r | |
3632 | //\r | |
3633 | // Advance the instruction pointer\r | |
3634 | //\r | |
3635 | VmPtr->Ip += Size;\r | |
3636 | return EFI_SUCCESS;\r | |
3637 | }\r | |
3638 | \r | |
3639 | STATIC\r | |
3640 | EFI_STATUS\r | |
3641 | ExecuteLOADSP (\r | |
3642 | IN VM_CONTEXT *VmPtr\r | |
3643 | )\r | |
3644 | /*++\r | |
3645 | \r | |
3646 | Routine Description:\r | |
3647 | Execute the EBC LOADSP instruction\r | |
3648 | \r | |
3649 | Arguments:\r | |
3650 | VmPtr - pointer to a VM context \r | |
3651 | \r | |
3652 | Returns:\r | |
3653 | Standard EFI_STATUS\r | |
3654 | \r | |
3655 | Instruction syntax:\r | |
3656 | LOADSP SP1, R2\r | |
3657 | \r | |
3658 | --*/\r | |
3659 | {\r | |
3660 | UINT8 Operands;\r | |
3661 | \r | |
3662 | //\r | |
3663 | // Get the operands\r | |
3664 | //\r | |
3665 | Operands = GETOPERANDS (VmPtr);\r | |
3666 | \r | |
3667 | //\r | |
3668 | // Do the operation\r | |
3669 | //\r | |
3670 | switch (OPERAND1_REGNUM (Operands)) {\r | |
3671 | //\r | |
3672 | // Set flags\r | |
3673 | //\r | |
3674 | case 0:\r | |
3675 | //\r | |
3676 | // Spec states that this instruction will not modify reserved bits in\r | |
3677 | // the flags register.\r | |
3678 | //\r | |
3679 | VmPtr->Flags = (VmPtr->Flags &~VMFLAGS_ALL_VALID) | (VmPtr->R[OPERAND2_REGNUM (Operands)] & VMFLAGS_ALL_VALID);\r | |
3680 | break;\r | |
3681 | \r | |
3682 | default:\r | |
3683 | EbcDebugSignalException (\r | |
3684 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
3685 | EXCEPTION_FLAG_WARNING,\r | |
3686 | VmPtr\r | |
3687 | );\r | |
3688 | VmPtr->Ip += 2;\r | |
3689 | return EFI_UNSUPPORTED;\r | |
3690 | }\r | |
3691 | \r | |
3692 | VmPtr->Ip += 2;\r | |
3693 | return EFI_SUCCESS;\r | |
3694 | }\r | |
3695 | \r | |
3696 | STATIC\r | |
3697 | EFI_STATUS\r | |
3698 | ExecuteSTORESP (\r | |
3699 | IN VM_CONTEXT *VmPtr\r | |
3700 | )\r | |
3701 | /*++\r | |
3702 | \r | |
3703 | Routine Description:\r | |
3704 | Execute the EBC STORESP instruction\r | |
3705 | \r | |
3706 | Arguments:\r | |
3707 | VmPtr - pointer to a VM context \r | |
3708 | \r | |
3709 | Returns:\r | |
3710 | Standard EFI_STATUS\r | |
3711 | \r | |
3712 | Instruction syntax:\r | |
3713 | STORESP Rx, FLAGS|IP\r | |
3714 | \r | |
3715 | --*/\r | |
3716 | {\r | |
3717 | UINT8 Operands;\r | |
3718 | \r | |
3719 | //\r | |
3720 | // Get the operands\r | |
3721 | //\r | |
3722 | Operands = GETOPERANDS (VmPtr);\r | |
3723 | \r | |
3724 | //\r | |
3725 | // Do the operation\r | |
3726 | //\r | |
3727 | switch (OPERAND2_REGNUM (Operands)) {\r | |
3728 | //\r | |
3729 | // Get flags\r | |
3730 | //\r | |
3731 | case 0:\r | |
3732 | //\r | |
3733 | // Retrieve the value in the flags register, then clear reserved bits\r | |
3734 | //\r | |
3735 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (UINT64) (VmPtr->Flags & VMFLAGS_ALL_VALID);\r | |
3736 | break;\r | |
3737 | \r | |
3738 | //\r | |
3739 | // Get IP -- address of following instruction\r | |
3740 | //\r | |
3741 | case 1:\r | |
3742 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (UINT64) (UINTN) VmPtr->Ip + 2;\r | |
3743 | break;\r | |
3744 | \r | |
3745 | default:\r | |
3746 | EbcDebugSignalException (\r | |
3747 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
3748 | EXCEPTION_FLAG_WARNING,\r | |
3749 | VmPtr\r | |
3750 | );\r | |
3751 | VmPtr->Ip += 2;\r | |
3752 | return EFI_UNSUPPORTED;\r | |
3753 | break;\r | |
3754 | }\r | |
3755 | \r | |
3756 | VmPtr->Ip += 2;\r | |
3757 | return EFI_SUCCESS;\r | |
3758 | }\r | |
3759 | \r | |
3760 | STATIC\r | |
3761 | INT16\r | |
3762 | VmReadIndex16 (\r | |
3763 | IN VM_CONTEXT *VmPtr,\r | |
3764 | IN UINT32 CodeOffset\r | |
3765 | )\r | |
3766 | /*++\r | |
3767 | \r | |
3768 | Routine Description:\r | |
3769 | Decode a 16-bit index to determine the offset. Given an index value:\r | |
3770 | \r | |
3771 | b15 - sign bit\r | |
3772 | b14:12 - number of bits in this index assigned to natural units (=a)\r | |
3773 | ba:11 - constant units = C\r | |
3774 | b0:a - natural units = N\r | |
3775 | \r | |
3776 | Given this info, the offset can be computed by:\r | |
3777 | offset = sign_bit * (C + N * sizeof(UINTN))\r | |
3778 | \r | |
3779 | Max offset is achieved with index = 0x7FFF giving an offset of\r | |
3780 | 0x27B (32-bit machine) or 0x477 (64-bit machine).\r | |
3781 | Min offset is achieved with index = \r | |
3782 | \r | |
3783 | Arguments:\r | |
3784 | VmPtr - pointer to VM context\r | |
3785 | CodeOffset - offset from IP of the location of the 16-bit index to decode\r | |
3786 | \r | |
3787 | Returns:\r | |
3788 | The decoded offset.\r | |
3789 | \r | |
3790 | --*/\r | |
3791 | {\r | |
3792 | UINT16 Index;\r | |
3793 | INT16 Offset;\r | |
3794 | INT16 C;\r | |
3795 | INT16 N;\r | |
3796 | INT16 NBits;\r | |
3797 | INT16 Mask;\r | |
3798 | \r | |
3799 | //\r | |
3800 | // First read the index from the code stream\r | |
3801 | //\r | |
3802 | Index = VmReadCode16 (VmPtr, CodeOffset);\r | |
3803 | \r | |
3804 | //\r | |
3805 | // Get the mask for N. First get the number of bits from the index.\r | |
3806 | //\r | |
3807 | NBits = (INT16) ((Index & 0x7000) >> 12);\r | |
3808 | \r | |
3809 | //\r | |
3810 | // Scale it for 16-bit indexes\r | |
3811 | //\r | |
3812 | NBits *= 2;\r | |
3813 | \r | |
3814 | //\r | |
3815 | // Now using the number of bits, create a mask.\r | |
3816 | //\r | |
3817 | Mask = (INT16) ((INT16)~0 << NBits);\r | |
3818 | \r | |
3819 | //\r | |
3820 | // Now using the mask, extract N from the lower bits of the index.\r | |
3821 | //\r | |
3822 | N = (INT16) (Index &~Mask);\r | |
3823 | \r | |
3824 | //\r | |
3825 | // Now compute C\r | |
3826 | //\r | |
3827 | C = (INT16) (((Index &~0xF000) & Mask) >> NBits);\r | |
3828 | \r | |
3829 | Offset = (INT16) (N * sizeof (UINTN) + C);\r | |
3830 | \r | |
3831 | //\r | |
3832 | // Now set the sign\r | |
3833 | //\r | |
3834 | if (Index & 0x8000) {\r | |
3835 | //\r | |
3836 | // Do it the hard way to work around a bogus compiler warning\r | |
3837 | //\r | |
3838 | // Offset = -1 * Offset;\r | |
3839 | //\r | |
3840 | Offset = (INT16) ((INT32) Offset * -1);\r | |
3841 | }\r | |
3842 | \r | |
3843 | return Offset;\r | |
3844 | }\r | |
3845 | \r | |
3846 | STATIC\r | |
3847 | INT32\r | |
3848 | VmReadIndex32 (\r | |
3849 | IN VM_CONTEXT *VmPtr,\r | |
3850 | IN UINT32 CodeOffset\r | |
3851 | )\r | |
3852 | /*++\r | |
3853 | \r | |
3854 | Routine Description:\r | |
3855 | Decode a 32-bit index to determine the offset.\r | |
3856 | \r | |
3857 | Arguments:\r | |
3858 | VmPtr - pointer to VM context\r | |
3859 | CodeOffset - offset from IP of the location of the 32-bit index to decode\r | |
3860 | \r | |
3861 | Returns:\r | |
3862 | Converted index per EBC VM specification\r | |
3863 | \r | |
3864 | --*/\r | |
3865 | {\r | |
3866 | UINT32 Index;\r | |
3867 | INT32 Offset;\r | |
3868 | INT32 C;\r | |
3869 | INT32 N;\r | |
3870 | INT32 NBits;\r | |
3871 | INT32 Mask;\r | |
3872 | \r | |
3873 | Index = VmReadImmed32 (VmPtr, CodeOffset);\r | |
3874 | \r | |
3875 | //\r | |
3876 | // Get the mask for N. First get the number of bits from the index.\r | |
3877 | //\r | |
3878 | NBits = (Index & 0x70000000) >> 28;\r | |
3879 | \r | |
3880 | //\r | |
3881 | // Scale it for 32-bit indexes\r | |
3882 | //\r | |
3883 | NBits *= 4;\r | |
3884 | \r | |
3885 | //\r | |
3886 | // Now using the number of bits, create a mask.\r | |
3887 | //\r | |
3888 | Mask = (INT32)~0 << NBits;\r | |
3889 | \r | |
3890 | //\r | |
3891 | // Now using the mask, extract N from the lower bits of the index.\r | |
3892 | //\r | |
3893 | N = Index &~Mask;\r | |
3894 | \r | |
3895 | //\r | |
3896 | // Now compute C\r | |
3897 | //\r | |
3898 | C = ((Index &~0xF0000000) & Mask) >> NBits;\r | |
3899 | \r | |
3900 | Offset = N * sizeof (UINTN) + C;\r | |
3901 | \r | |
3902 | //\r | |
3903 | // Now set the sign\r | |
3904 | //\r | |
3905 | if (Index & 0x80000000) {\r | |
3906 | Offset = Offset * -1;\r | |
3907 | }\r | |
3908 | \r | |
3909 | return Offset;\r | |
3910 | }\r | |
3911 | \r | |
3912 | STATIC\r | |
3913 | INT64\r | |
3914 | VmReadIndex64 (\r | |
3915 | IN VM_CONTEXT *VmPtr,\r | |
3916 | IN UINT32 CodeOffset\r | |
3917 | )\r | |
3918 | /*++\r | |
3919 | \r | |
3920 | Routine Description:\r | |
3921 | Decode a 64-bit index to determine the offset.\r | |
3922 | \r | |
3923 | Arguments:\r | |
3924 | VmPtr - pointer to VM context\r | |
3925 | CodeOffset - offset from IP of the location of the 64-bit index to decode\r | |
3926 | \r | |
3927 | Returns:\r | |
3928 | Converted index per EBC VM specification\r | |
3929 | \r | |
3930 | --*/\r | |
3931 | {\r | |
3932 | UINT64 Index;\r | |
878ddf1f | 3933 | INT64 Offset;\r |
3934 | INT64 C;\r | |
3935 | INT64 N;\r | |
3936 | INT64 NBits;\r | |
3937 | INT64 Mask;\r | |
3938 | \r | |
3939 | Index = VmReadCode64 (VmPtr, CodeOffset);\r | |
3940 | \r | |
3941 | //\r | |
3942 | // Get the mask for N. First get the number of bits from the index.\r | |
3943 | //\r | |
6d7338ae | 3944 | NBits = RShiftU64 ((Index & 0x7000000000000000ULL), 60);\r |
878ddf1f | 3945 | \r |
3946 | //\r | |
3947 | // Scale it for 64-bit indexes (multiply by 8 by shifting left 3)\r | |
3948 | //\r | |
6d7338ae | 3949 | NBits = LShiftU64 ((UINT64)NBits, 3);\r |
878ddf1f | 3950 | \r |
3951 | //\r | |
3952 | // Now using the number of bits, create a mask.\r | |
3953 | //\r | |
6d7338ae | 3954 | Mask = (LShiftU64 ((UINT64)~0, (UINTN)NBits));\r |
878ddf1f | 3955 | \r |
3956 | //\r | |
3957 | // Now using the mask, extract N from the lower bits of the index.\r | |
3958 | //\r | |
3959 | N = Index &~Mask;\r | |
3960 | \r | |
3961 | //\r | |
3962 | // Now compute C\r | |
3963 | //\r | |
6d7338ae | 3964 | C = ARShiftU64 (((Index &~0xF000000000000000ULL) & Mask), (UINTN)NBits);\r |
878ddf1f | 3965 | \r |
6d7338ae | 3966 | Offset = MultU64x64 (N, sizeof (UINTN)) + C;\r |
878ddf1f | 3967 | \r |
3968 | //\r | |
3969 | // Now set the sign\r | |
3970 | //\r | |
3971 | if (Index & 0x8000000000000000ULL) {\r | |
6d7338ae | 3972 | Offset = MultS64x64 (Offset, -1);\r |
878ddf1f | 3973 | }\r |
3974 | \r | |
3975 | return Offset;\r | |
3976 | }\r | |
3977 | \r | |
3978 | STATIC\r | |
3979 | EFI_STATUS\r | |
3980 | VmWriteMem8 (\r | |
3981 | IN VM_CONTEXT *VmPtr,\r | |
3982 | IN UINTN Addr,\r | |
3983 | IN UINT8 Data\r | |
3984 | )\r | |
3985 | /*++\r | |
3986 | \r | |
3987 | Routine Description:\r | |
3988 | The following VmWriteMem? routines are called by the EBC data\r | |
3989 | movement instructions that write to memory. Since these writes\r | |
3990 | may be to the stack, which looks like (high address on top) this,\r | |
3991 | \r | |
3992 | [EBC entry point arguments]\r | |
3993 | [VM stack]\r | |
3994 | [EBC stack]\r | |
3995 | \r | |
3996 | we need to detect all attempts to write to the EBC entry point argument\r | |
3997 | stack area and adjust the address (which will initially point into the \r | |
3998 | VM stack) to point into the EBC entry point arguments.\r | |
3999 | \r | |
4000 | Arguments:\r | |
4001 | VmPtr - pointer to a VM context \r | |
4002 | Addr - adddress to write to\r | |
4003 | Data - value to write to Addr\r | |
4004 | \r | |
4005 | Returns:\r | |
4006 | Standard EFI_STATUS\r | |
4007 | \r | |
4008 | --*/\r | |
4009 | {\r | |
4010 | //\r | |
4011 | // Convert the address if it's in the stack gap\r | |
4012 | //\r | |
4013 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4014 | *(UINT8 *) Addr = Data;\r | |
4015 | return EFI_SUCCESS;\r | |
4016 | }\r | |
4017 | \r | |
4018 | STATIC\r | |
4019 | EFI_STATUS\r | |
4020 | VmWriteMem16 (\r | |
4021 | IN VM_CONTEXT *VmPtr,\r | |
4022 | IN UINTN Addr,\r | |
4023 | IN UINT16 Data\r | |
4024 | )\r | |
4025 | {\r | |
4026 | EFI_STATUS Status;\r | |
4027 | \r | |
4028 | //\r | |
4029 | // Convert the address if it's in the stack gap\r | |
4030 | //\r | |
4031 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4032 | \r | |
4033 | //\r | |
4034 | // Do a simple write if aligned\r | |
4035 | //\r | |
4036 | if (IS_ALIGNED (Addr, sizeof (UINT16))) {\r | |
4037 | *(UINT16 *) Addr = Data;\r | |
4038 | } else {\r | |
4039 | //\r | |
4040 | // Write as two bytes\r | |
4041 | //\r | |
4042 | MemoryFence ();\r | |
4043 | if ((Status = VmWriteMem8 (VmPtr, Addr, (UINT8) Data)) != EFI_SUCCESS) {\r | |
4044 | return Status;\r | |
4045 | }\r | |
4046 | \r | |
4047 | MemoryFence ();\r | |
4048 | if ((Status = VmWriteMem8 (VmPtr, Addr + 1, (UINT8) (Data >> 8))) != EFI_SUCCESS) {\r | |
4049 | return Status;\r | |
4050 | }\r | |
4051 | \r | |
4052 | MemoryFence ();\r | |
4053 | }\r | |
4054 | \r | |
4055 | return EFI_SUCCESS;\r | |
4056 | }\r | |
4057 | \r | |
4058 | STATIC\r | |
4059 | EFI_STATUS\r | |
4060 | VmWriteMem32 (\r | |
4061 | IN VM_CONTEXT *VmPtr,\r | |
4062 | IN UINTN Addr,\r | |
4063 | IN UINT32 Data\r | |
4064 | )\r | |
4065 | {\r | |
4066 | EFI_STATUS Status;\r | |
4067 | \r | |
4068 | //\r | |
4069 | // Convert the address if it's in the stack gap\r | |
4070 | //\r | |
4071 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4072 | \r | |
4073 | //\r | |
4074 | // Do a simple write if aligned\r | |
4075 | //\r | |
4076 | if (IS_ALIGNED (Addr, sizeof (UINT32))) {\r | |
4077 | *(UINT32 *) Addr = Data;\r | |
4078 | } else {\r | |
4079 | //\r | |
4080 | // Write as two words\r | |
4081 | //\r | |
4082 | MemoryFence ();\r | |
4083 | if ((Status = VmWriteMem16 (VmPtr, Addr, (UINT16) Data)) != EFI_SUCCESS) {\r | |
4084 | return Status;\r | |
4085 | }\r | |
4086 | \r | |
4087 | MemoryFence ();\r | |
4088 | if ((Status = VmWriteMem16 (VmPtr, Addr + sizeof (UINT16), (UINT16) (Data >> 16))) != EFI_SUCCESS) {\r | |
4089 | return Status;\r | |
4090 | }\r | |
4091 | \r | |
4092 | MemoryFence ();\r | |
4093 | }\r | |
4094 | \r | |
4095 | return EFI_SUCCESS;\r | |
4096 | }\r | |
4097 | \r | |
4098 | EFI_STATUS\r | |
4099 | VmWriteMem64 (\r | |
4100 | IN VM_CONTEXT *VmPtr,\r | |
4101 | IN UINTN Addr,\r | |
4102 | IN UINT64 Data\r | |
4103 | )\r | |
4104 | {\r | |
4105 | EFI_STATUS Status;\r | |
4106 | UINT32 Data32;\r | |
4107 | \r | |
4108 | //\r | |
4109 | // Convert the address if it's in the stack gap\r | |
4110 | //\r | |
4111 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4112 | \r | |
4113 | //\r | |
4114 | // Do a simple write if aligned\r | |
4115 | //\r | |
4116 | if (IS_ALIGNED (Addr, sizeof (UINT64))) {\r | |
4117 | *(UINT64 *) Addr = Data;\r | |
4118 | } else {\r | |
4119 | //\r | |
4120 | // Write as two 32-bit words\r | |
4121 | //\r | |
4122 | MemoryFence ();\r | |
4123 | if ((Status = VmWriteMem32 (VmPtr, Addr, (UINT32) Data)) != EFI_SUCCESS) {\r | |
4124 | return Status;\r | |
4125 | }\r | |
4126 | \r | |
4127 | MemoryFence ();\r | |
4128 | Data32 = (UINT32) (((UINT32 *) &Data)[1]);\r | |
4129 | if ((Status = VmWriteMem32 (VmPtr, Addr + sizeof (UINT32), Data32)) != EFI_SUCCESS) {\r | |
4130 | return Status;\r | |
4131 | }\r | |
4132 | \r | |
4133 | MemoryFence ();\r | |
4134 | }\r | |
4135 | \r | |
4136 | return EFI_SUCCESS;\r | |
4137 | }\r | |
4138 | \r | |
4139 | EFI_STATUS\r | |
4140 | VmWriteMemN (\r | |
4141 | IN VM_CONTEXT *VmPtr,\r | |
4142 | IN UINTN Addr,\r | |
4143 | IN UINTN Data\r | |
4144 | )\r | |
4145 | {\r | |
4146 | EFI_STATUS Status;\r | |
4147 | UINTN Index;\r | |
4148 | \r | |
4149 | Status = EFI_SUCCESS;\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 | //\r | |
4157 | // Do a simple write if aligned\r | |
4158 | //\r | |
4159 | if (IS_ALIGNED (Addr, sizeof (UINTN))) {\r | |
4160 | *(UINTN *) Addr = Data;\r | |
4161 | } else {\r | |
4162 | for (Index = 0; Index < sizeof (UINTN) / sizeof (UINT32); Index++) {\r | |
4163 | MemoryFence ();\r | |
4164 | Status = VmWriteMem32 (VmPtr, Addr + Index * sizeof (UINT32), (UINT32) Data);\r | |
4165 | MemoryFence ();\r | |
4166 | Data = (UINTN)RShiftU64 ((UINT64)Data, 32);\r | |
4167 | }\r | |
4168 | }\r | |
4169 | \r | |
4170 | return Status;\r | |
4171 | }\r | |
4172 | \r | |
4173 | STATIC\r | |
4174 | INT8\r | |
4175 | VmReadImmed8 (\r | |
4176 | IN VM_CONTEXT *VmPtr,\r | |
4177 | IN UINT32 Offset\r | |
4178 | )\r | |
4179 | /*++\r | |
4180 | \r | |
4181 | Routine Description:\r | |
4182 | \r | |
4183 | The following VmReadImmed routines are called by the EBC execute\r | |
4184 | functions to read EBC immediate values from the code stream.\r | |
4185 | Since we can't assume alignment, each tries to read in the biggest \r | |
4186 | chunks size available, but will revert to smaller reads if necessary.\r | |
4187 | \r | |
4188 | Arguments:\r | |
4189 | VmPtr - pointer to a VM context \r | |
4190 | Offset - offset from IP of the code bytes to read.\r | |
4191 | \r | |
4192 | Returns:\r | |
4193 | Signed data of the requested size from the specified address.\r | |
4194 | \r | |
4195 | --*/\r | |
4196 | {\r | |
4197 | //\r | |
4198 | // Simply return the data in flat memory space\r | |
4199 | //\r | |
4200 | return * (INT8 *) (VmPtr->Ip + Offset);\r | |
4201 | }\r | |
4202 | \r | |
4203 | STATIC\r | |
4204 | INT16\r | |
4205 | VmReadImmed16 (\r | |
4206 | IN VM_CONTEXT *VmPtr,\r | |
4207 | IN UINT32 Offset\r | |
4208 | )\r | |
4209 | {\r | |
4210 | //\r | |
4211 | // Read direct if aligned\r | |
4212 | //\r | |
4213 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (INT16))) {\r | |
4214 | return * (INT16 *) (VmPtr->Ip + Offset);\r | |
4215 | } else {\r | |
4216 | //\r | |
4217 | // All code word reads should be aligned\r | |
4218 | //\r | |
4219 | EbcDebugSignalException (\r | |
4220 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
4221 | EXCEPTION_FLAG_WARNING,\r | |
4222 | VmPtr\r | |
4223 | );\r | |
4224 | }\r | |
4225 | //\r | |
4226 | // Return unaligned data\r | |
4227 | //\r | |
4228 | return (INT16) (*(UINT8 *) (VmPtr->Ip + Offset) + (*(UINT8 *) (VmPtr->Ip + Offset + 1) << 8));\r | |
4229 | }\r | |
4230 | \r | |
4231 | STATIC\r | |
4232 | INT32\r | |
4233 | VmReadImmed32 (\r | |
4234 | IN VM_CONTEXT *VmPtr,\r | |
4235 | IN UINT32 Offset\r | |
4236 | )\r | |
4237 | {\r | |
4238 | UINT32 Data;\r | |
4239 | \r | |
4240 | //\r | |
4241 | // Read direct if aligned\r | |
4242 | //\r | |
4243 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT32))) {\r | |
4244 | return * (INT32 *) (VmPtr->Ip + Offset);\r | |
4245 | }\r | |
4246 | //\r | |
4247 | // Return unaligned data\r | |
4248 | //\r | |
4249 | Data = (UINT32) VmReadCode16 (VmPtr, Offset);\r | |
4250 | Data |= (UINT32) (VmReadCode16 (VmPtr, Offset + 2) << 16);\r | |
4251 | return Data;\r | |
4252 | }\r | |
4253 | \r | |
4254 | STATIC\r | |
4255 | INT64\r | |
4256 | VmReadImmed64 (\r | |
4257 | IN VM_CONTEXT *VmPtr,\r | |
4258 | IN UINT32 Offset\r | |
4259 | )\r | |
4260 | {\r | |
4261 | UINT64 Data64;\r | |
4262 | UINT32 Data32;\r | |
4263 | UINT8 *Ptr;\r | |
4264 | \r | |
4265 | //\r | |
4266 | // Read direct if aligned\r | |
4267 | //\r | |
4268 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT64))) {\r | |
4269 | return * (UINT64 *) (VmPtr->Ip + Offset);\r | |
4270 | }\r | |
4271 | //\r | |
4272 | // Return unaligned data.\r | |
4273 | //\r | |
4274 | Ptr = (UINT8 *) &Data64;\r | |
4275 | Data32 = VmReadCode32 (VmPtr, Offset);\r | |
4276 | *(UINT32 *) Ptr = Data32;\r | |
4277 | Ptr += sizeof (Data32);\r | |
4278 | Data32 = VmReadCode32 (VmPtr, Offset + sizeof (UINT32));\r | |
4279 | *(UINT32 *) Ptr = Data32;\r | |
4280 | return Data64;\r | |
4281 | }\r | |
4282 | \r | |
4283 | STATIC\r | |
4284 | UINT16\r | |
4285 | VmReadCode16 (\r | |
4286 | IN VM_CONTEXT *VmPtr,\r | |
4287 | IN UINT32 Offset\r | |
4288 | )\r | |
4289 | /*++\r | |
4290 | \r | |
4291 | Routine Description:\r | |
4292 | The following VmReadCode() routines provide the ability to read raw \r | |
4293 | unsigned data from the code stream. \r | |
4294 | \r | |
4295 | Arguments:\r | |
4296 | VmPtr - pointer to VM context\r | |
4297 | Offset - offset from current IP to the raw data to read.\r | |
4298 | \r | |
4299 | Returns:\r | |
4300 | The raw unsigned 16-bit value from the code stream.\r | |
4301 | \r | |
4302 | --*/\r | |
4303 | {\r | |
4304 | //\r | |
4305 | // Read direct if aligned\r | |
4306 | //\r | |
4307 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT16))) {\r | |
4308 | return * (UINT16 *) (VmPtr->Ip + Offset);\r | |
4309 | } else {\r | |
4310 | //\r | |
4311 | // All code word reads should be aligned\r | |
4312 | //\r | |
4313 | EbcDebugSignalException (\r | |
4314 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
4315 | EXCEPTION_FLAG_WARNING,\r | |
4316 | VmPtr\r | |
4317 | );\r | |
4318 | }\r | |
4319 | //\r | |
4320 | // Return unaligned data\r | |
4321 | //\r | |
4322 | return (UINT16) (*(UINT8 *) (VmPtr->Ip + Offset) + (*(UINT8 *) (VmPtr->Ip + Offset + 1) << 8));\r | |
4323 | }\r | |
4324 | \r | |
4325 | STATIC\r | |
4326 | UINT32\r | |
4327 | VmReadCode32 (\r | |
4328 | IN VM_CONTEXT *VmPtr,\r | |
4329 | IN UINT32 Offset\r | |
4330 | )\r | |
4331 | {\r | |
4332 | UINT32 Data;\r | |
4333 | //\r | |
4334 | // Read direct if aligned\r | |
4335 | //\r | |
4336 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT32))) {\r | |
4337 | return * (UINT32 *) (VmPtr->Ip + Offset);\r | |
4338 | }\r | |
4339 | //\r | |
4340 | // Return unaligned data\r | |
4341 | //\r | |
4342 | Data = (UINT32) VmReadCode16 (VmPtr, Offset);\r | |
4343 | Data |= (VmReadCode16 (VmPtr, Offset + 2) << 16);\r | |
4344 | return Data;\r | |
4345 | }\r | |
4346 | \r | |
4347 | STATIC\r | |
4348 | UINT64\r | |
4349 | VmReadCode64 (\r | |
4350 | IN VM_CONTEXT *VmPtr,\r | |
4351 | IN UINT32 Offset\r | |
4352 | )\r | |
4353 | {\r | |
4354 | UINT64 Data64;\r | |
4355 | UINT32 Data32;\r | |
4356 | UINT8 *Ptr;\r | |
4357 | \r | |
4358 | //\r | |
4359 | // Read direct if aligned\r | |
4360 | //\r | |
4361 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT64))) {\r | |
4362 | return * (UINT64 *) (VmPtr->Ip + Offset);\r | |
4363 | }\r | |
4364 | //\r | |
4365 | // Return unaligned data.\r | |
4366 | //\r | |
4367 | Ptr = (UINT8 *) &Data64;\r | |
4368 | Data32 = VmReadCode32 (VmPtr, Offset);\r | |
4369 | *(UINT32 *) Ptr = Data32;\r | |
4370 | Ptr += sizeof (Data32);\r | |
4371 | Data32 = VmReadCode32 (VmPtr, Offset + sizeof (UINT32));\r | |
4372 | *(UINT32 *) Ptr = Data32;\r | |
4373 | return Data64;\r | |
4374 | }\r | |
4375 | \r | |
4376 | STATIC\r | |
4377 | UINT8\r | |
4378 | VmReadMem8 (\r | |
4379 | IN VM_CONTEXT *VmPtr,\r | |
4380 | IN UINTN Addr\r | |
4381 | )\r | |
4382 | {\r | |
4383 | //\r | |
4384 | // Convert the address if it's in the stack gap\r | |
4385 | //\r | |
4386 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4387 | //\r | |
4388 | // Simply return the data in flat memory space\r | |
4389 | //\r | |
4390 | return * (UINT8 *) Addr;\r | |
4391 | }\r | |
4392 | \r | |
4393 | STATIC\r | |
4394 | UINT16\r | |
4395 | VmReadMem16 (\r | |
4396 | IN VM_CONTEXT *VmPtr,\r | |
4397 | IN UINTN Addr\r | |
4398 | )\r | |
4399 | {\r | |
4400 | //\r | |
4401 | // Convert the address if it's in the stack gap\r | |
4402 | //\r | |
4403 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4404 | //\r | |
4405 | // Read direct if aligned\r | |
4406 | //\r | |
4407 | if (IS_ALIGNED (Addr, sizeof (UINT16))) {\r | |
4408 | return * (UINT16 *) Addr;\r | |
4409 | }\r | |
4410 | //\r | |
4411 | // Return unaligned data\r | |
4412 | //\r | |
4413 | return (UINT16) (*(UINT8 *) Addr + (*(UINT8 *) (Addr + 1) << 8));\r | |
4414 | }\r | |
4415 | \r | |
4416 | STATIC\r | |
4417 | UINT32\r | |
4418 | VmReadMem32 (\r | |
4419 | IN VM_CONTEXT *VmPtr,\r | |
4420 | IN UINTN Addr\r | |
4421 | )\r | |
4422 | {\r | |
4423 | UINT32 Data;\r | |
4424 | \r | |
4425 | //\r | |
4426 | // Convert the address if it's in the stack gap\r | |
4427 | //\r | |
4428 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4429 | //\r | |
4430 | // Read direct if aligned\r | |
4431 | //\r | |
4432 | if (IS_ALIGNED (Addr, sizeof (UINT32))) {\r | |
4433 | return * (UINT32 *) Addr;\r | |
4434 | }\r | |
4435 | //\r | |
4436 | // Return unaligned data\r | |
4437 | //\r | |
4438 | Data = (UINT32) VmReadMem16 (VmPtr, Addr);\r | |
4439 | Data |= (VmReadMem16 (VmPtr, Addr + 2) << 16);\r | |
4440 | return Data;\r | |
4441 | }\r | |
4442 | \r | |
4443 | STATIC\r | |
4444 | UINT64\r | |
4445 | VmReadMem64 (\r | |
4446 | IN VM_CONTEXT *VmPtr,\r | |
4447 | IN UINTN Addr\r | |
4448 | )\r | |
4449 | {\r | |
4450 | UINT64 Data;\r | |
4451 | UINT32 Data32;\r | |
4452 | \r | |
4453 | //\r | |
4454 | // Convert the address if it's in the stack gap\r | |
4455 | //\r | |
4456 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4457 | \r | |
4458 | //\r | |
4459 | // Read direct if aligned\r | |
4460 | //\r | |
4461 | if (IS_ALIGNED (Addr, sizeof (UINT64))) {\r | |
4462 | return * (UINT64 *) Addr;\r | |
4463 | }\r | |
4464 | //\r | |
4465 | // Return unaligned data. Assume little endian.\r | |
4466 | //\r | |
4467 | Data = (UINT64) VmReadMem32 (VmPtr, Addr);\r | |
4468 | Data32 = VmReadMem32 (VmPtr, Addr + sizeof (UINT32));\r | |
4469 | *(UINT32 *) ((UINT32 *) &Data + 1) = Data32;\r | |
4470 | return Data;\r | |
4471 | }\r | |
4472 | \r | |
4473 | STATIC\r | |
4474 | UINTN\r | |
4475 | ConvertStackAddr (\r | |
4476 | IN VM_CONTEXT *VmPtr,\r | |
4477 | IN UINTN Addr\r | |
4478 | )\r | |
4479 | /*++\r | |
4480 | \r | |
4481 | Routine Description:\r | |
4482 | \r | |
4483 | Given an address that EBC is going to read from or write to, return\r | |
4484 | an appropriate address that accounts for a gap in the stack.\r | |
4485 | \r | |
4486 | The stack for this application looks like this (high addr on top)\r | |
4487 | [EBC entry point arguments]\r | |
4488 | [VM stack]\r | |
4489 | [EBC stack]\r | |
4490 | \r | |
4491 | The EBC assumes that its arguments are at the top of its stack, which\r | |
4492 | is where the VM stack is really. Therefore if the EBC does memory\r | |
4493 | accesses into the VM stack area, then we need to convert the address\r | |
4494 | to point to the EBC entry point arguments area. Do this here.\r | |
4495 | \r | |
4496 | Arguments:\r | |
4497 | \r | |
4498 | VmPtr - pointer to VM context\r | |
4499 | Addr - address of interest\r | |
4500 | \r | |
4501 | Returns:\r | |
4502 | \r | |
4503 | The unchanged address if it's not in the VM stack region. Otherwise, \r | |
4504 | adjust for the stack gap and return the modified address.\r | |
4505 | \r | |
4506 | --*/\r | |
4507 | {\r | |
4508 | if ((Addr >= VmPtr->LowStackTop) && (Addr < VmPtr->HighStackBottom)) {\r | |
4509 | //\r | |
4510 | // In the stack gap -- now make sure it's not in the VM itself, which\r | |
4511 | // would be the case if it's accessing VM register contents.\r | |
4512 | //\r | |
4513 | if ((Addr < (UINTN) VmPtr) || (Addr > (UINTN) VmPtr + sizeof (VM_CONTEXT))) {\r | |
4514 | VmPtr->LastAddrConverted = Addr;\r | |
4515 | VmPtr->LastAddrConvertedValue = Addr - VmPtr->LowStackTop + VmPtr->HighStackBottom;\r | |
4516 | return Addr - VmPtr->LowStackTop + VmPtr->HighStackBottom;\r | |
4517 | }\r | |
4518 | }\r | |
4519 | \r | |
4520 | return Addr;\r | |
4521 | }\r | |
4522 | \r | |
4523 | STATIC\r | |
4524 | UINTN\r | |
4525 | VmReadMemN (\r | |
4526 | IN VM_CONTEXT *VmPtr,\r | |
4527 | IN UINTN Addr\r | |
4528 | )\r | |
4529 | /*++\r | |
4530 | \r | |
4531 | Routine Description:\r | |
4532 | Read a natural value from memory. May or may not be aligned.\r | |
4533 | \r | |
4534 | Arguments:\r | |
4535 | VmPtr - current VM context\r | |
4536 | Addr - the address to read from\r | |
4537 | \r | |
4538 | Returns:\r | |
4539 | The natural value at address Addr.\r | |
4540 | \r | |
4541 | --*/\r | |
4542 | {\r | |
4543 | UINTN Data;\r | |
3401c092 | 4544 | volatile UINT32 Size;\r |
878ddf1f | 4545 | UINT8 *FromPtr;\r |
4546 | UINT8 *ToPtr;\r | |
4547 | //\r | |
4548 | // Convert the address if it's in the stack gap\r | |
4549 | //\r | |
4550 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4551 | //\r | |
4552 | // Read direct if aligned\r | |
4553 | //\r | |
4554 | if (IS_ALIGNED (Addr, sizeof (UINTN))) {\r | |
4555 | return * (UINTN *) Addr;\r | |
4556 | }\r | |
4557 | //\r | |
4558 | // Return unaligned data\r | |
4559 | //\r | |
4560 | Data = 0;\r | |
4561 | FromPtr = (UINT8 *) Addr;\r | |
4562 | ToPtr = (UINT8 *) &Data;\r | |
4563 | \r | |
4564 | for (Size = 0; Size < sizeof (Data); Size++) {\r | |
4565 | *ToPtr = *FromPtr;\r | |
4566 | ToPtr++;\r | |
4567 | FromPtr++;\r | |
4568 | }\r | |
4569 | \r | |
4570 | return Data;\r | |
4571 | }\r | |
4572 | \r | |
4573 | UINT64\r | |
4574 | GetVmVersion (\r | |
4575 | VOID\r | |
4576 | )\r | |
4577 | {\r | |
4578 | return (UINT64) (((VM_MAJOR_VERSION & 0xFFFF) << 16) | ((VM_MINOR_VERSION & 0xFFFF)));\r | |
4579 | }\r |