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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 | |
878ddf1f | 25 | \r |
26 | //\r | |
27 | // Define some useful data size constants to allow switch statements based on\r | |
28 | // size of operands or data.\r | |
29 | //\r | |
30 | #define DATA_SIZE_INVALID 0\r | |
31 | #define DATA_SIZE_8 1\r | |
32 | #define DATA_SIZE_16 2\r | |
33 | #define DATA_SIZE_32 4\r | |
34 | #define DATA_SIZE_64 8\r | |
35 | #define DATA_SIZE_N 48 // 4 or 8\r | |
36 | //\r | |
37 | // Structure we'll use to dispatch opcodes to execute functions.\r | |
38 | //\r | |
39 | typedef struct {\r | |
40 | EFI_STATUS (*ExecuteFunction) (IN VM_CONTEXT * VmPtr);\r | |
41 | }\r | |
42 | VM_TABLE_ENTRY;\r | |
43 | \r | |
44 | typedef\r | |
45 | UINT64\r | |
46 | (*DATA_MANIP_EXEC_FUNCTION) (\r | |
47 | IN VM_CONTEXT * VmPtr,\r | |
48 | IN UINT64 Op1,\r | |
49 | IN UINT64 Op2\r | |
50 | );\r | |
51 | \r | |
52 | STATIC\r | |
53 | INT16\r | |
54 | VmReadIndex16 (\r | |
55 | IN VM_CONTEXT *VmPtr,\r | |
56 | IN UINT32 CodeOffset\r | |
57 | );\r | |
58 | \r | |
59 | STATIC\r | |
60 | INT32\r | |
61 | VmReadIndex32 (\r | |
62 | IN VM_CONTEXT *VmPtr,\r | |
63 | IN UINT32 CodeOffset\r | |
64 | );\r | |
65 | \r | |
66 | STATIC\r | |
67 | INT64\r | |
68 | VmReadIndex64 (\r | |
69 | IN VM_CONTEXT *VmPtr,\r | |
70 | IN UINT32 CodeOffset\r | |
71 | );\r | |
72 | \r | |
73 | STATIC\r | |
74 | UINT8\r | |
75 | VmReadMem8 (\r | |
76 | IN VM_CONTEXT *VmPtr,\r | |
77 | IN UINTN Addr\r | |
78 | );\r | |
79 | \r | |
80 | STATIC\r | |
81 | UINT16\r | |
82 | VmReadMem16 (\r | |
83 | IN VM_CONTEXT *VmPtr,\r | |
84 | IN UINTN Addr\r | |
85 | );\r | |
86 | \r | |
87 | STATIC\r | |
88 | UINT32\r | |
89 | VmReadMem32 (\r | |
90 | IN VM_CONTEXT *VmPtr,\r | |
91 | IN UINTN Addr\r | |
92 | );\r | |
93 | \r | |
94 | STATIC\r | |
95 | UINT64\r | |
96 | VmReadMem64 (\r | |
97 | IN VM_CONTEXT *VmPtr,\r | |
98 | IN UINTN Addr\r | |
99 | );\r | |
100 | \r | |
101 | STATIC\r | |
102 | UINTN\r | |
103 | VmReadMemN (\r | |
104 | IN VM_CONTEXT *VmPtr,\r | |
105 | IN UINTN Addr\r | |
106 | );\r | |
107 | \r | |
108 | STATIC\r | |
109 | EFI_STATUS\r | |
110 | VmWriteMem8 (\r | |
111 | IN VM_CONTEXT *VmPtr,\r | |
112 | UINTN Addr,\r | |
113 | IN UINT8 Data\r | |
114 | );\r | |
115 | \r | |
116 | STATIC\r | |
117 | EFI_STATUS\r | |
118 | VmWriteMem16 (\r | |
119 | IN VM_CONTEXT *VmPtr,\r | |
120 | UINTN Addr,\r | |
121 | IN UINT16 Data\r | |
122 | );\r | |
123 | \r | |
124 | STATIC\r | |
125 | EFI_STATUS\r | |
126 | VmWriteMem32 (\r | |
127 | IN VM_CONTEXT *VmPtr,\r | |
128 | UINTN Addr,\r | |
129 | IN UINT32 Data\r | |
130 | );\r | |
131 | \r | |
878ddf1f | 132 | STATIC\r |
133 | UINT16\r | |
134 | VmReadCode16 (\r | |
135 | IN VM_CONTEXT *VmPtr,\r | |
136 | IN UINT32 Offset\r | |
137 | );\r | |
138 | \r | |
139 | STATIC\r | |
140 | UINT32\r | |
141 | VmReadCode32 (\r | |
142 | IN VM_CONTEXT *VmPtr,\r | |
143 | IN UINT32 Offset\r | |
144 | );\r | |
145 | \r | |
146 | STATIC\r | |
147 | UINT64\r | |
148 | VmReadCode64 (\r | |
149 | IN VM_CONTEXT *VmPtr,\r | |
150 | IN UINT32 Offset\r | |
151 | );\r | |
152 | \r | |
153 | STATIC\r | |
154 | INT8\r | |
155 | VmReadImmed8 (\r | |
156 | IN VM_CONTEXT *VmPtr,\r | |
157 | IN UINT32 Offset\r | |
158 | );\r | |
159 | \r | |
160 | STATIC\r | |
161 | INT16\r | |
162 | VmReadImmed16 (\r | |
163 | IN VM_CONTEXT *VmPtr,\r | |
164 | IN UINT32 Offset\r | |
165 | );\r | |
166 | \r | |
167 | STATIC\r | |
168 | INT32\r | |
169 | VmReadImmed32 (\r | |
170 | IN VM_CONTEXT *VmPtr,\r | |
171 | IN UINT32 Offset\r | |
172 | );\r | |
173 | \r | |
174 | STATIC\r | |
175 | INT64\r | |
176 | VmReadImmed64 (\r | |
177 | IN VM_CONTEXT *VmPtr,\r | |
178 | IN UINT32 Offset\r | |
179 | );\r | |
180 | \r | |
181 | STATIC\r | |
182 | UINTN\r | |
183 | ConvertStackAddr (\r | |
184 | IN VM_CONTEXT *VmPtr,\r | |
185 | IN UINTN Addr\r | |
186 | );\r | |
187 | \r | |
188 | STATIC\r | |
189 | EFI_STATUS\r | |
190 | ExecuteDataManip (\r | |
191 | IN VM_CONTEXT *VmPtr,\r | |
192 | IN BOOLEAN IsSignedOperation\r | |
193 | );\r | |
194 | \r | |
195 | //\r | |
196 | // Functions that execute VM opcodes\r | |
197 | //\r | |
198 | STATIC\r | |
199 | EFI_STATUS\r | |
200 | ExecuteBREAK (\r | |
201 | IN VM_CONTEXT *VmPtr\r | |
202 | );\r | |
203 | \r | |
204 | STATIC\r | |
205 | EFI_STATUS\r | |
206 | ExecuteJMP (\r | |
207 | IN VM_CONTEXT *VmPtr\r | |
208 | );\r | |
209 | \r | |
210 | STATIC\r | |
211 | EFI_STATUS\r | |
212 | ExecuteJMP8 (\r | |
213 | IN VM_CONTEXT *VmPtr\r | |
214 | );\r | |
215 | \r | |
216 | STATIC\r | |
217 | EFI_STATUS\r | |
218 | ExecuteCALL (\r | |
219 | IN VM_CONTEXT *VmPtr\r | |
220 | );\r | |
221 | \r | |
222 | STATIC\r | |
223 | EFI_STATUS\r | |
224 | ExecuteRET (\r | |
225 | IN VM_CONTEXT *VmPtr\r | |
226 | );\r | |
227 | \r | |
228 | STATIC\r | |
229 | EFI_STATUS\r | |
230 | ExecuteCMP (\r | |
231 | IN VM_CONTEXT *VmPtr\r | |
232 | );\r | |
233 | \r | |
234 | STATIC\r | |
235 | EFI_STATUS\r | |
236 | ExecuteCMPI (\r | |
237 | IN VM_CONTEXT *VmPtr\r | |
238 | );\r | |
239 | \r | |
240 | STATIC\r | |
241 | EFI_STATUS\r | |
242 | ExecuteMOVxx (\r | |
243 | IN VM_CONTEXT *VmPtr\r | |
244 | );\r | |
245 | \r | |
246 | STATIC\r | |
247 | EFI_STATUS\r | |
248 | ExecuteMOVI (\r | |
249 | IN VM_CONTEXT *VmPtr\r | |
250 | );\r | |
251 | \r | |
252 | STATIC\r | |
253 | EFI_STATUS\r | |
254 | ExecuteMOVIn (\r | |
255 | IN VM_CONTEXT *VmPtr\r | |
256 | );\r | |
257 | \r | |
258 | STATIC\r | |
259 | EFI_STATUS\r | |
260 | ExecuteMOVREL (\r | |
261 | IN VM_CONTEXT *VmPtr\r | |
262 | );\r | |
263 | \r | |
264 | STATIC\r | |
265 | EFI_STATUS\r | |
266 | ExecutePUSHn (\r | |
267 | IN VM_CONTEXT *VmPtr\r | |
268 | );\r | |
269 | \r | |
270 | STATIC\r | |
271 | EFI_STATUS\r | |
272 | ExecutePUSH (\r | |
273 | IN VM_CONTEXT *VmPtr\r | |
274 | );\r | |
275 | \r | |
276 | STATIC\r | |
277 | EFI_STATUS\r | |
278 | ExecutePOPn (\r | |
279 | IN VM_CONTEXT *VmPtr\r | |
280 | );\r | |
281 | \r | |
282 | STATIC\r | |
283 | EFI_STATUS\r | |
284 | ExecutePOP (\r | |
285 | IN VM_CONTEXT *VmPtr\r | |
286 | );\r | |
287 | \r | |
288 | STATIC\r | |
289 | EFI_STATUS\r | |
290 | ExecuteSignedDataManip (\r | |
291 | IN VM_CONTEXT *VmPtr\r | |
292 | );\r | |
293 | \r | |
294 | STATIC\r | |
295 | EFI_STATUS\r | |
296 | ExecuteUnsignedDataManip (\r | |
297 | IN VM_CONTEXT *VmPtr\r | |
298 | );\r | |
299 | \r | |
300 | STATIC\r | |
301 | EFI_STATUS\r | |
302 | ExecuteLOADSP (\r | |
303 | IN VM_CONTEXT *VmPtr\r | |
304 | );\r | |
305 | \r | |
306 | STATIC\r | |
307 | EFI_STATUS\r | |
308 | ExecuteSTORESP (\r | |
309 | IN VM_CONTEXT *VmPtr\r | |
310 | );\r | |
311 | \r | |
312 | STATIC\r | |
313 | EFI_STATUS\r | |
314 | ExecuteMOVsnd (\r | |
315 | IN VM_CONTEXT *VmPtr\r | |
316 | );\r | |
317 | \r | |
318 | STATIC\r | |
319 | EFI_STATUS\r | |
320 | ExecuteMOVsnw (\r | |
321 | IN VM_CONTEXT *VmPtr\r | |
322 | );\r | |
323 | \r | |
324 | //\r | |
325 | // Data manipulation subfunctions\r | |
326 | //\r | |
327 | STATIC\r | |
328 | UINT64\r | |
329 | ExecuteNOT (\r | |
330 | IN VM_CONTEXT *VmPtr,\r | |
331 | IN UINT64 Op1,\r | |
332 | IN UINT64 Op2\r | |
333 | );\r | |
334 | \r | |
335 | STATIC\r | |
336 | UINT64\r | |
337 | ExecuteNEG (\r | |
338 | IN VM_CONTEXT *VmPtr,\r | |
339 | IN UINT64 Op1,\r | |
340 | IN UINT64 Op2\r | |
341 | );\r | |
342 | \r | |
343 | STATIC\r | |
344 | UINT64\r | |
345 | ExecuteADD (\r | |
346 | IN VM_CONTEXT *VmPtr,\r | |
347 | IN UINT64 Op1,\r | |
348 | IN UINT64 Op2\r | |
349 | );\r | |
350 | \r | |
351 | STATIC\r | |
352 | UINT64\r | |
353 | ExecuteSUB (\r | |
354 | IN VM_CONTEXT *VmPtr,\r | |
355 | IN UINT64 Op1,\r | |
356 | IN UINT64 Op2\r | |
357 | );\r | |
358 | \r | |
359 | STATIC\r | |
360 | UINT64\r | |
361 | ExecuteMUL (\r | |
362 | IN VM_CONTEXT *VmPtr,\r | |
363 | IN UINT64 Op1,\r | |
364 | IN UINT64 Op2\r | |
365 | );\r | |
366 | \r | |
367 | STATIC\r | |
368 | UINT64\r | |
369 | ExecuteMULU (\r | |
370 | IN VM_CONTEXT *VmPtr,\r | |
371 | IN UINT64 Op1,\r | |
372 | IN UINT64 Op2\r | |
373 | );\r | |
374 | \r | |
375 | STATIC\r | |
376 | UINT64\r | |
377 | ExecuteDIV (\r | |
378 | IN VM_CONTEXT *VmPtr,\r | |
379 | IN UINT64 Op1,\r | |
380 | IN UINT64 Op2\r | |
381 | );\r | |
382 | \r | |
383 | STATIC\r | |
384 | UINT64\r | |
385 | ExecuteDIVU (\r | |
386 | IN VM_CONTEXT *VmPtr,\r | |
387 | IN UINT64 Op1,\r | |
388 | IN UINT64 Op2\r | |
389 | );\r | |
390 | \r | |
391 | STATIC\r | |
392 | UINT64\r | |
393 | ExecuteMOD (\r | |
394 | IN VM_CONTEXT *VmPtr,\r | |
395 | IN UINT64 Op1,\r | |
396 | IN UINT64 Op2\r | |
397 | );\r | |
398 | \r | |
399 | STATIC\r | |
400 | UINT64\r | |
401 | ExecuteMODU (\r | |
402 | IN VM_CONTEXT *VmPtr,\r | |
403 | IN UINT64 Op1,\r | |
404 | IN UINT64 Op2\r | |
405 | );\r | |
406 | \r | |
407 | STATIC\r | |
408 | UINT64\r | |
409 | ExecuteAND (\r | |
410 | IN VM_CONTEXT *VmPtr,\r | |
411 | IN UINT64 Op1,\r | |
412 | IN UINT64 Op2\r | |
413 | );\r | |
414 | \r | |
415 | STATIC\r | |
416 | UINT64\r | |
417 | ExecuteOR (\r | |
418 | IN VM_CONTEXT *VmPtr,\r | |
419 | IN UINT64 Op1,\r | |
420 | IN UINT64 Op2\r | |
421 | );\r | |
422 | \r | |
423 | STATIC\r | |
424 | UINT64\r | |
425 | ExecuteXOR (\r | |
426 | IN VM_CONTEXT *VmPtr,\r | |
427 | IN UINT64 Op1,\r | |
428 | IN UINT64 Op2\r | |
429 | );\r | |
430 | \r | |
431 | STATIC\r | |
432 | UINT64\r | |
433 | ExecuteSHL (\r | |
434 | IN VM_CONTEXT *VmPtr,\r | |
435 | IN UINT64 Op1,\r | |
436 | IN UINT64 Op2\r | |
437 | );\r | |
438 | \r | |
439 | STATIC\r | |
440 | UINT64\r | |
441 | ExecuteSHR (\r | |
442 | IN VM_CONTEXT *VmPtr,\r | |
443 | IN UINT64 Op1,\r | |
444 | IN UINT64 Op2\r | |
445 | );\r | |
446 | \r | |
447 | STATIC\r | |
448 | UINT64\r | |
449 | ExecuteASHR (\r | |
450 | IN VM_CONTEXT *VmPtr,\r | |
451 | IN UINT64 Op1,\r | |
452 | IN UINT64 Op2\r | |
453 | );\r | |
454 | \r | |
455 | STATIC\r | |
456 | UINT64\r | |
457 | ExecuteEXTNDB (\r | |
458 | IN VM_CONTEXT *VmPtr,\r | |
459 | IN UINT64 Op1,\r | |
460 | IN UINT64 Op2\r | |
461 | );\r | |
462 | \r | |
463 | STATIC\r | |
464 | UINT64\r | |
465 | ExecuteEXTNDW (\r | |
466 | IN VM_CONTEXT *VmPtr,\r | |
467 | IN UINT64 Op1,\r | |
468 | IN UINT64 Op2\r | |
469 | );\r | |
470 | \r | |
471 | STATIC\r | |
472 | UINT64\r | |
473 | ExecuteEXTNDD (\r | |
474 | IN VM_CONTEXT *VmPtr,\r | |
475 | IN UINT64 Op1,\r | |
476 | IN UINT64 Op2\r | |
477 | );\r | |
478 | \r | |
479 | //\r | |
480 | // Once we retrieve the operands for the data manipulation instructions,\r | |
481 | // call these functions to perform the operation.\r | |
482 | //\r | |
483 | static CONST DATA_MANIP_EXEC_FUNCTION mDataManipDispatchTable[] = {\r | |
484 | ExecuteNOT,\r | |
485 | ExecuteNEG,\r | |
486 | ExecuteADD,\r | |
487 | ExecuteSUB,\r | |
488 | ExecuteMUL,\r | |
489 | ExecuteMULU,\r | |
490 | ExecuteDIV,\r | |
491 | ExecuteDIVU,\r | |
492 | ExecuteMOD,\r | |
493 | ExecuteMODU,\r | |
494 | ExecuteAND,\r | |
495 | ExecuteOR,\r | |
496 | ExecuteXOR,\r | |
497 | ExecuteSHL,\r | |
498 | ExecuteSHR,\r | |
499 | ExecuteASHR,\r | |
500 | ExecuteEXTNDB,\r | |
501 | ExecuteEXTNDW,\r | |
502 | ExecuteEXTNDD,\r | |
503 | };\r | |
504 | \r | |
505 | static CONST VM_TABLE_ENTRY mVmOpcodeTable[] = {\r | |
506 | { ExecuteBREAK }, // opcode 0x00\r | |
507 | { ExecuteJMP }, // opcode 0x01\r | |
508 | { ExecuteJMP8 }, // opcode 0x02\r | |
509 | { ExecuteCALL }, // opcode 0x03\r | |
510 | { ExecuteRET }, // opcode 0x04\r | |
511 | { ExecuteCMP }, // opcode 0x05 CMPeq\r | |
512 | { ExecuteCMP }, // opcode 0x06 CMPlte\r | |
513 | { ExecuteCMP }, // opcode 0x07 CMPgte\r | |
514 | { ExecuteCMP }, // opcode 0x08 CMPulte\r | |
515 | { ExecuteCMP }, // opcode 0x09 CMPugte\r | |
516 | { ExecuteUnsignedDataManip }, // opcode 0x0A NOT\r | |
517 | { ExecuteSignedDataManip }, // opcode 0x0B NEG\r | |
518 | { ExecuteSignedDataManip }, // opcode 0x0C ADD\r | |
519 | { ExecuteSignedDataManip }, // opcode 0x0D SUB\r | |
520 | { ExecuteSignedDataManip }, // opcode 0x0E MUL\r | |
521 | { ExecuteUnsignedDataManip }, // opcode 0x0F MULU\r | |
522 | { ExecuteSignedDataManip }, // opcode 0x10 DIV\r | |
523 | { ExecuteUnsignedDataManip }, // opcode 0x11 DIVU\r | |
524 | { ExecuteSignedDataManip }, // opcode 0x12 MOD\r | |
525 | { ExecuteUnsignedDataManip }, // opcode 0x13 MODU\r | |
526 | { ExecuteUnsignedDataManip }, // opcode 0x14 AND\r | |
527 | { ExecuteUnsignedDataManip }, // opcode 0x15 OR\r | |
528 | { ExecuteUnsignedDataManip }, // opcode 0x16 XOR\r | |
529 | { ExecuteUnsignedDataManip }, // opcode 0x17 SHL\r | |
530 | { ExecuteUnsignedDataManip }, // opcode 0x18 SHR\r | |
531 | { ExecuteSignedDataManip }, // opcode 0x19 ASHR\r | |
532 | { ExecuteUnsignedDataManip }, // opcode 0x1A EXTNDB\r | |
533 | { ExecuteUnsignedDataManip }, // opcode 0x1B EXTNDW\r | |
534 | { ExecuteUnsignedDataManip }, // opcode 0x1C EXTNDD\r | |
535 | { ExecuteMOVxx }, // opcode 0x1D MOVBW\r | |
536 | { ExecuteMOVxx }, // opcode 0x1E MOVWW\r | |
537 | { ExecuteMOVxx }, // opcode 0x1F MOVDW\r | |
538 | { ExecuteMOVxx }, // opcode 0x20 MOVQW\r | |
539 | { ExecuteMOVxx }, // opcode 0x21 MOVBD\r | |
540 | { ExecuteMOVxx }, // opcode 0x22 MOVWD\r | |
541 | { ExecuteMOVxx }, // opcode 0x23 MOVDD\r | |
542 | { ExecuteMOVxx }, // opcode 0x24 MOVQD\r | |
543 | { ExecuteMOVsnw }, // opcode 0x25 MOVsnw\r | |
544 | { ExecuteMOVsnd }, // opcode 0x26 MOVsnd\r | |
545 | { NULL }, // opcode 0x27\r | |
546 | { ExecuteMOVxx }, // opcode 0x28 MOVqq\r | |
547 | { ExecuteLOADSP }, // opcode 0x29 LOADSP SP1, R2\r | |
548 | { ExecuteSTORESP }, // opcode 0x2A STORESP R1, SP2\r | |
549 | { ExecutePUSH }, // opcode 0x2B PUSH {@}R1 [imm16]\r | |
550 | { ExecutePOP }, // opcode 0x2C POP {@}R1 [imm16]\r | |
551 | { ExecuteCMPI }, // opcode 0x2D CMPIEQ\r | |
552 | { ExecuteCMPI }, // opcode 0x2E CMPILTE\r | |
553 | { ExecuteCMPI }, // opcode 0x2F CMPIGTE\r | |
554 | { ExecuteCMPI }, // opcode 0x30 CMPIULTE\r | |
555 | { ExecuteCMPI }, // opcode 0x31 CMPIUGTE\r | |
556 | { ExecuteMOVxx }, // opcode 0x32 MOVN\r | |
557 | { ExecuteMOVxx }, // opcode 0x33 MOVND\r | |
558 | { NULL }, // opcode 0x34\r | |
559 | { ExecutePUSHn }, // opcode 0x35\r | |
560 | { ExecutePOPn }, // opcode 0x36\r | |
561 | { ExecuteMOVI }, // opcode 0x37 - mov immediate data\r | |
562 | { ExecuteMOVIn }, // opcode 0x38 - mov immediate natural\r | |
563 | { ExecuteMOVREL } // opcode 0x39 - move data relative to PC\r | |
564 | };\r | |
565 | \r | |
566 | //\r | |
567 | // Length of JMP instructions, depending on upper two bits of opcode.\r | |
568 | //\r | |
569 | static CONST UINT8 mJMPLen[] = { 2, 2, 6, 10 };\r | |
570 | \r | |
571 | //\r | |
572 | // Simple Debugger Protocol GUID\r | |
573 | //\r | |
574 | EFI_GUID mEbcSimpleDebuggerProtocolGuid = EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL_GUID;\r | |
575 | \r | |
576 | EFI_STATUS\r | |
577 | EbcExecuteInstructions (\r | |
578 | IN EFI_EBC_VM_TEST_PROTOCOL *This,\r | |
579 | IN VM_CONTEXT *VmPtr,\r | |
580 | IN OUT UINTN *InstructionCount\r | |
581 | )\r | |
582 | /*++\r | |
583 | \r | |
584 | Routine Description:\r | |
585 | \r | |
586 | Given a pointer to a new VM context, execute one or more instructions. This\r | |
587 | function is only used for test purposes via the EBC VM test protocol.\r | |
588 | \r | |
589 | Arguments:\r | |
590 | \r | |
591 | This - pointer to protocol interface\r | |
592 | VmPtr - pointer to a VM context\r | |
593 | InstructionCount - how many instructions to execute. 0 if don't count.\r | |
594 | \r | |
595 | Returns:\r | |
596 | \r | |
597 | EFI_UNSUPPORTED\r | |
598 | EFI_SUCCESS\r | |
599 | \r | |
600 | --*/\r | |
601 | {\r | |
602 | UINTN ExecFunc;\r | |
603 | EFI_STATUS Status;\r | |
604 | UINTN InstructionsLeft;\r | |
605 | UINTN SavedInstructionCount;\r | |
606 | \r | |
607 | Status = EFI_SUCCESS;\r | |
608 | \r | |
609 | if (*InstructionCount == 0) {\r | |
610 | InstructionsLeft = 1;\r | |
611 | } else {\r | |
612 | InstructionsLeft = *InstructionCount;\r | |
613 | }\r | |
614 | \r | |
615 | SavedInstructionCount = *InstructionCount;\r | |
616 | *InstructionCount = 0;\r | |
617 | \r | |
618 | //\r | |
619 | // Index into the opcode table using the opcode byte for this instruction.\r | |
620 | // This gives you the execute function, which we first test for null, then\r | |
621 | // call it if it's not null.\r | |
622 | //\r | |
623 | while (InstructionsLeft != 0) {\r | |
624 | ExecFunc = (UINTN) mVmOpcodeTable[(*VmPtr->Ip & 0x3F)].ExecuteFunction;\r | |
625 | if (ExecFunc == (UINTN) NULL) {\r | |
626 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
627 | return EFI_UNSUPPORTED;\r | |
628 | } else {\r | |
629 | mVmOpcodeTable[(*VmPtr->Ip & 0x3F)].ExecuteFunction (VmPtr);\r | |
630 | *InstructionCount = *InstructionCount + 1;\r | |
631 | }\r | |
632 | \r | |
633 | //\r | |
634 | // Decrement counter if applicable\r | |
635 | //\r | |
636 | if (SavedInstructionCount != 0) {\r | |
637 | InstructionsLeft--;\r | |
638 | }\r | |
639 | }\r | |
640 | \r | |
641 | return Status;\r | |
642 | }\r | |
643 | \r | |
644 | EFI_STATUS\r | |
645 | EbcExecute (\r | |
646 | IN VM_CONTEXT *VmPtr\r | |
647 | )\r | |
648 | /*++\r | |
649 | \r | |
650 | Routine Description:\r | |
651 | \r | |
652 | Execute an EBC image from an entry point or from a published protocol.\r | |
653 | \r | |
654 | Arguments:\r | |
655 | \r | |
656 | VmPtr - pointer to prepared VM context.\r | |
657 | \r | |
658 | Returns:\r | |
659 | \r | |
660 | Standard EBC status.\r | |
661 | \r | |
662 | --*/\r | |
663 | {\r | |
664 | UINTN ExecFunc;\r | |
665 | UINT8 StackCorrupted;\r | |
666 | EFI_STATUS Status;\r | |
667 | EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL *EbcSimpleDebugger;\r | |
668 | \r | |
c91eaa3d | 669 | mVmPtr = VmPtr;\r |
878ddf1f | 670 | EbcSimpleDebugger = NULL;\r |
671 | Status = EFI_SUCCESS;\r | |
672 | StackCorrupted = 0;\r | |
673 | \r | |
674 | //\r | |
675 | // Make sure the magic value has been put on the stack before we got here.\r | |
676 | //\r | |
677 | if (*VmPtr->StackMagicPtr != (UINTN) VM_STACK_KEY_VALUE) {\r | |
678 | StackCorrupted = 1;\r | |
679 | }\r | |
680 | \r | |
681 | VmPtr->FramePtr = (VOID *) ((UINT8 *) (UINTN) VmPtr->R[0] + 8);\r | |
682 | \r | |
683 | //\r | |
684 | // Try to get the debug support for EBC\r | |
685 | //\r | |
2ce31132 | 686 | DEBUG_CODE_BEGIN ();\r |
878ddf1f | 687 | Status = gBS->LocateProtocol (\r |
688 | &mEbcSimpleDebuggerProtocolGuid,\r | |
689 | NULL,\r | |
690 | (VOID **) &EbcSimpleDebugger\r | |
691 | );\r | |
692 | if (EFI_ERROR (Status)) {\r | |
693 | EbcSimpleDebugger = NULL;\r | |
694 | }\r | |
2ce31132 | 695 | DEBUG_CODE_END ();\r |
878ddf1f | 696 | \r |
697 | //\r | |
698 | // Save the start IP for debug. For example, if we take an exception we\r | |
699 | // can print out the location of the exception relative to the entry point,\r | |
700 | // which could then be used in a disassembly listing to find the problem.\r | |
701 | //\r | |
702 | VmPtr->EntryPoint = (VOID *) VmPtr->Ip;\r | |
703 | \r | |
704 | //\r | |
705 | // We'll wait for this flag to know when we're done. The RET\r | |
706 | // instruction sets it if it runs out of stack.\r | |
707 | //\r | |
708 | VmPtr->StopFlags = 0;\r | |
709 | while (!(VmPtr->StopFlags & STOPFLAG_APP_DONE)) {\r | |
710 | //\r | |
711 | // If we've found a simple debugger protocol, call it\r | |
712 | //\r | |
2ce31132 | 713 | DEBUG_CODE_BEGIN ();\r |
878ddf1f | 714 | if (EbcSimpleDebugger != NULL) {\r |
715 | EbcSimpleDebugger->Debugger (EbcSimpleDebugger, VmPtr);\r | |
716 | }\r | |
2ce31132 | 717 | DEBUG_CODE_END ();\r |
878ddf1f | 718 | \r |
719 | //\r | |
720 | // Verify the opcode is in range. Otherwise generate an exception.\r | |
721 | //\r | |
722 | if ((*VmPtr->Ip & OPCODE_M_OPCODE) >= (sizeof (mVmOpcodeTable) / sizeof (mVmOpcodeTable[0]))) {\r | |
723 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
724 | Status = EFI_UNSUPPORTED;\r | |
725 | goto Done;\r | |
726 | }\r | |
727 | //\r | |
728 | // Use the opcode bits to index into the opcode dispatch table. If the\r | |
729 | // function pointer is null then generate an exception.\r | |
730 | //\r | |
731 | ExecFunc = (UINTN) mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction;\r | |
732 | if (ExecFunc == (UINTN) NULL) {\r | |
733 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
734 | Status = EFI_UNSUPPORTED;\r | |
735 | goto Done;\r | |
736 | }\r | |
737 | //\r | |
738 | // The EBC VM is a strongly ordered processor, so perform a fence operation before\r | |
739 | // and after each instruction is executed.\r | |
740 | //\r | |
741 | MemoryFence ();\r | |
742 | \r | |
743 | mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction (VmPtr);\r | |
744 | \r | |
745 | MemoryFence ();\r | |
746 | \r | |
747 | //\r | |
748 | // If the step flag is set, signal an exception and continue. We don't\r | |
749 | // clear it here. Assuming the debugger is responsible for clearing it.\r | |
750 | //\r | |
751 | if (VMFLAG_ISSET (VmPtr, VMFLAGS_STEP)) {\r | |
752 | EbcDebugSignalException (EXCEPT_EBC_STEP, EXCEPTION_FLAG_NONE, VmPtr);\r | |
753 | }\r | |
754 | //\r | |
755 | // Make sure stack has not been corrupted. Only report it once though.\r | |
756 | //\r | |
757 | if (!StackCorrupted && (*VmPtr->StackMagicPtr != (UINTN) VM_STACK_KEY_VALUE)) {\r | |
758 | EbcDebugSignalException (EXCEPT_EBC_STACK_FAULT, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
759 | StackCorrupted = 1;\r | |
760 | }\r | |
73ebf379 | 761 | if (!StackCorrupted && ((UINT64)VmPtr->R[0] <= (UINT64)(UINTN) VmPtr->StackTop)) {\r |
762 | EbcDebugSignalException (EXCEPT_EBC_STACK_FAULT, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
763 | StackCorrupted = 1;\r | |
764 | }\r | |
878ddf1f | 765 | }\r |
766 | \r | |
767 | Done:\r | |
c91eaa3d | 768 | mVmPtr = NULL;\r |
73ebf379 | 769 | \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 | |
878ddf1f | 1125 | break;\r |
1126 | \r | |
1127 | //\r | |
1128 | // System call, which there are none, so NOP it.\r | |
1129 | //\r | |
1130 | case 4:\r | |
1131 | break;\r | |
1132 | \r | |
1133 | //\r | |
1134 | // Create a thunk for EBC code. R7 points to a 32-bit (in a 64-bit slot)\r | |
1135 | // "offset from self" pointer to the EBC entry point.\r | |
1136 | // After we're done, *(UINT64 *)R7 will be the address of the new thunk.\r | |
1137 | //\r | |
1138 | case 5:\r | |
1139 | Offset = (INT32) VmReadMem32 (VmPtr, (UINTN) VmPtr->R[7]);\r | |
1140 | U64EbcEntryPoint = (UINT64) (VmPtr->R[7] + Offset + 4);\r | |
1141 | EbcEntryPoint = (VOID *) (UINTN) U64EbcEntryPoint;\r | |
1142 | \r | |
1143 | //\r | |
1144 | // Now create a new thunk\r | |
1145 | //\r | |
1cc8ee78 | 1146 | EbcCreateThunks (VmPtr->ImageHandle, EbcEntryPoint, &Thunk, 0);\r |
878ddf1f | 1147 | \r |
1148 | //\r | |
1149 | // Finally replace the EBC entry point memory with the thunk address\r | |
1150 | //\r | |
1151 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[7], (UINT64) (UINTN) Thunk);\r | |
1152 | break;\r | |
1153 | \r | |
1154 | //\r | |
1155 | // Compiler setting version per value in R7\r | |
1156 | //\r | |
1157 | case 6:\r | |
1158 | VmPtr->CompilerVersion = (UINT32) VmPtr->R[7];\r | |
1159 | //\r | |
1160 | // Check compiler version against VM version?\r | |
1161 | //\r | |
1162 | break;\r | |
1163 | \r | |
1164 | //\r | |
1165 | // Unhandled break code. Signal exception.\r | |
1166 | //\r | |
1167 | default:\r | |
1168 | EbcDebugSignalException (EXCEPT_EBC_BAD_BREAK, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1169 | break;\r | |
1170 | }\r | |
1171 | //\r | |
1172 | // Advance IP\r | |
1173 | //\r | |
1174 | VmPtr->Ip += 2;\r | |
1175 | return EFI_SUCCESS;\r | |
1176 | }\r | |
1177 | \r | |
1178 | STATIC\r | |
1179 | EFI_STATUS\r | |
1180 | ExecuteJMP (\r | |
1181 | IN VM_CONTEXT *VmPtr\r | |
1182 | )\r | |
1183 | /*++\r | |
1184 | \r | |
1185 | Routine Description:\r | |
1186 | Execute the JMP instruction\r | |
1187 | \r | |
1188 | Arguments:\r | |
1189 | VmPtr - pointer to VM context\r | |
1190 | \r | |
1191 | Returns:\r | |
1192 | Standard EFI_STATUS\r | |
1193 | \r | |
1194 | Instruction syntax:\r | |
1195 | JMP64{cs|cc} Immed64\r | |
1196 | JMP32{cs|cc} {@}R1 {Immed32|Index32}\r | |
1197 | \r | |
1198 | Encoding:\r | |
1199 | b0.7 - immediate data present\r | |
1200 | b0.6 - 1 = 64 bit immediate data\r | |
1201 | 0 = 32 bit immediate data\r | |
1202 | b1.7 - 1 = conditional\r | |
1203 | b1.6 1 = CS (condition set)\r | |
1204 | 0 = CC (condition clear)\r | |
1205 | b1.4 1 = relative address\r | |
1206 | 0 = absolute address\r | |
1207 | b1.3 1 = operand1 indirect\r | |
1208 | b1.2-0 operand 1\r | |
1209 | \r | |
1210 | --*/\r | |
1211 | {\r | |
1212 | UINT8 Opcode;\r | |
1213 | UINT8 CompareSet;\r | |
1214 | UINT8 ConditionFlag;\r | |
1215 | UINT8 Size;\r | |
1216 | UINT8 Operand;\r | |
1217 | UINT64 Data64;\r | |
1218 | INT32 Index32;\r | |
1219 | UINTN Addr;\r | |
1220 | \r | |
1221 | Operand = GETOPERANDS (VmPtr);\r | |
1222 | Opcode = GETOPCODE (VmPtr);\r | |
1223 | \r | |
1224 | //\r | |
1225 | // Get instruction length from the opcode. The upper two bits are used here\r | |
1226 | // to index into the length array.\r | |
1227 | //\r | |
1228 | Size = mJMPLen[(Opcode >> 6) & 0x03];\r | |
1229 | \r | |
1230 | //\r | |
1231 | // Decode instruction conditions\r | |
1232 | // If we haven't met the condition, then simply advance the IP and return.\r | |
1233 | //\r | |
1234 | CompareSet = (UINT8) ((Operand & JMP_M_CS) ? 1 : 0);\r | |
1235 | ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);\r | |
1236 | if (Operand & CONDITION_M_CONDITIONAL) {\r | |
1237 | if (CompareSet != ConditionFlag) {\r | |
1238 | VmPtr->Ip += Size;\r | |
1239 | return EFI_SUCCESS;\r | |
1240 | }\r | |
1241 | }\r | |
1242 | //\r | |
1243 | // Check for 64-bit form and do it right away since it's the most\r | |
1244 | // straight-forward form.\r | |
1245 | //\r | |
1246 | if (Opcode & OPCODE_M_IMMDATA64) {\r | |
1247 | //\r | |
1248 | // Double check for immediate-data, which is required. If not there,\r | |
1249 | // then signal an exception\r | |
1250 | //\r | |
1251 | if (!(Opcode & OPCODE_M_IMMDATA)) {\r | |
1252 | EbcDebugSignalException (\r | |
1253 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1254 | EXCEPTION_FLAG_ERROR,\r | |
1255 | VmPtr\r | |
1256 | );\r | |
1257 | return EFI_UNSUPPORTED;\r | |
1258 | }\r | |
1259 | //\r | |
1260 | // 64-bit immediate data is full address. Read the immediate data,\r | |
1261 | // check for alignment, and jump absolute.\r | |
1262 | //\r | |
1263 | Data64 = VmReadImmed64 (VmPtr, 2);\r | |
1264 | if (!IS_ALIGNED ((UINTN) Data64, sizeof (UINT16))) {\r | |
1265 | EbcDebugSignalException (\r | |
1266 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
1267 | EXCEPTION_FLAG_FATAL,\r | |
1268 | VmPtr\r | |
1269 | );\r | |
1270 | \r | |
1271 | return EFI_UNSUPPORTED;\r | |
1272 | }\r | |
1273 | \r | |
1274 | //\r | |
1275 | // Take jump -- relative or absolute\r | |
1276 | //\r | |
1277 | if (Operand & JMP_M_RELATIVE) {\r | |
1278 | VmPtr->Ip += (UINTN) Data64 + Size;\r | |
1279 | } else {\r | |
1280 | VmPtr->Ip = (VMIP) (UINTN) Data64;\r | |
1281 | }\r | |
1282 | \r | |
1283 | return EFI_SUCCESS;\r | |
1284 | }\r | |
1285 | //\r | |
1286 | // 32-bit forms:\r | |
1287 | // Get the index if there is one. May be either an index, or an immediate\r | |
1288 | // offset depending on indirect operand.\r | |
1289 | // JMP32 @R1 Index32 -- immediate data is an index\r | |
1290 | // JMP32 R1 Immed32 -- immedate data is an offset\r | |
1291 | //\r | |
1292 | if (Opcode & OPCODE_M_IMMDATA) {\r | |
1293 | if (OPERAND1_INDIRECT (Operand)) {\r | |
1294 | Index32 = VmReadIndex32 (VmPtr, 2);\r | |
1295 | } else {\r | |
1296 | Index32 = VmReadImmed32 (VmPtr, 2);\r | |
1297 | }\r | |
1298 | } else {\r | |
1299 | Index32 = 0;\r | |
1300 | }\r | |
1301 | //\r | |
1302 | // Get the register data. If R == 0, then special case where it's ignored.\r | |
1303 | //\r | |
1304 | if (OPERAND1_REGNUM (Operand) == 0) {\r | |
1305 | Data64 = 0;\r | |
1306 | } else {\r | |
1307 | Data64 = OPERAND1_REGDATA (VmPtr, Operand);\r | |
1308 | }\r | |
1309 | //\r | |
1310 | // Decode the forms\r | |
1311 | //\r | |
1312 | if (OPERAND1_INDIRECT (Operand)) {\r | |
1313 | //\r | |
1314 | // Form: JMP32 @Rx {Index32}\r | |
1315 | //\r | |
1316 | Addr = VmReadMemN (VmPtr, (UINTN) Data64 + Index32);\r | |
1317 | if (!IS_ALIGNED ((UINTN) Addr, sizeof (UINT16))) {\r | |
1318 | EbcDebugSignalException (\r | |
1319 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
1320 | EXCEPTION_FLAG_FATAL,\r | |
1321 | VmPtr\r | |
1322 | );\r | |
1323 | \r | |
1324 | return EFI_UNSUPPORTED;\r | |
1325 | }\r | |
1326 | \r | |
1327 | if (Operand & JMP_M_RELATIVE) {\r | |
1328 | VmPtr->Ip += (UINTN) Addr + Size;\r | |
1329 | } else {\r | |
1330 | VmPtr->Ip = (VMIP) Addr;\r | |
1331 | }\r | |
1332 | } else {\r | |
1333 | //\r | |
1334 | // Form: JMP32 Rx {Immed32}\r | |
1335 | //\r | |
1336 | Addr = (UINTN) (Data64 + Index32);\r | |
1337 | if (!IS_ALIGNED ((UINTN) Addr, sizeof (UINT16))) {\r | |
1338 | EbcDebugSignalException (\r | |
1339 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
1340 | EXCEPTION_FLAG_FATAL,\r | |
1341 | VmPtr\r | |
1342 | );\r | |
1343 | \r | |
1344 | return EFI_UNSUPPORTED;\r | |
1345 | }\r | |
1346 | \r | |
1347 | if (Operand & JMP_M_RELATIVE) {\r | |
1348 | VmPtr->Ip += (UINTN) Addr + Size;\r | |
1349 | } else {\r | |
1350 | VmPtr->Ip = (VMIP) Addr;\r | |
1351 | }\r | |
1352 | }\r | |
1353 | \r | |
1354 | return EFI_SUCCESS;\r | |
1355 | }\r | |
1356 | \r | |
1357 | STATIC\r | |
1358 | EFI_STATUS\r | |
1359 | ExecuteJMP8 (\r | |
1360 | IN VM_CONTEXT *VmPtr\r | |
1361 | )\r | |
1362 | /*++\r | |
1363 | \r | |
1364 | Routine Description:\r | |
1365 | Execute the EBC JMP8 instruction\r | |
1366 | \r | |
1367 | Arguments:\r | |
1368 | VmPtr - pointer to a VM context \r | |
1369 | \r | |
1370 | Returns:\r | |
1371 | Standard EFI_STATUS\r | |
1372 | \r | |
1373 | Instruction syntax:\r | |
1374 | JMP8{cs|cc} Offset/2\r | |
1375 | \r | |
1376 | --*/\r | |
1377 | {\r | |
1378 | UINT8 Opcode;\r | |
1379 | UINT8 ConditionFlag;\r | |
1380 | UINT8 CompareSet;\r | |
1381 | INT8 Offset;\r | |
1382 | \r | |
1383 | //\r | |
1384 | // Decode instruction.\r | |
1385 | //\r | |
1386 | Opcode = GETOPCODE (VmPtr);\r | |
1387 | CompareSet = (UINT8) ((Opcode & JMP_M_CS) ? 1 : 0);\r | |
1388 | ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);\r | |
1389 | \r | |
1390 | //\r | |
1391 | // If we haven't met the condition, then simply advance the IP and return\r | |
1392 | //\r | |
1393 | if (Opcode & CONDITION_M_CONDITIONAL) {\r | |
1394 | if (CompareSet != ConditionFlag) {\r | |
1395 | VmPtr->Ip += 2;\r | |
1396 | return EFI_SUCCESS;\r | |
1397 | }\r | |
1398 | }\r | |
1399 | //\r | |
1400 | // Get the offset from the instruction stream. It's relative to the\r | |
1401 | // following instruction, and divided by 2.\r | |
1402 | //\r | |
1403 | Offset = VmReadImmed8 (VmPtr, 1);\r | |
1404 | //\r | |
1405 | // Want to check for offset == -2 and then raise an exception?\r | |
1406 | //\r | |
1407 | VmPtr->Ip += (Offset * 2) + 2;\r | |
1408 | return EFI_SUCCESS;\r | |
1409 | }\r | |
1410 | \r | |
1411 | STATIC\r | |
1412 | EFI_STATUS\r | |
1413 | ExecuteMOVI (\r | |
1414 | IN VM_CONTEXT *VmPtr\r | |
1415 | )\r | |
1416 | /*++\r | |
1417 | \r | |
1418 | Routine Description:\r | |
1419 | \r | |
1420 | Execute the EBC MOVI \r | |
1421 | \r | |
1422 | Arguments:\r | |
1423 | \r | |
1424 | VmPtr - pointer to a VM context \r | |
1425 | \r | |
1426 | Returns:\r | |
1427 | \r | |
1428 | Standard EFI_STATUS\r | |
1429 | \r | |
1430 | Instruction syntax:\r | |
1431 | \r | |
1432 | MOVI[b|w|d|q][w|d|q] {@}R1 {Index16}, ImmData16|32|64\r | |
1433 | \r | |
1434 | First variable character specifies the move size\r | |
1435 | Second variable character specifies size of the immediate data\r | |
1436 | \r | |
1437 | Sign-extend the immediate data to the size of the operation, and zero-extend\r | |
1438 | if storing to a register.\r | |
1439 | \r | |
1440 | Operand1 direct with index/immed is invalid.\r | |
1441 | \r | |
1442 | --*/\r | |
1443 | {\r | |
1444 | UINT8 Opcode;\r | |
1445 | UINT8 Operands;\r | |
1446 | UINT8 Size;\r | |
1447 | INT16 Index16;\r | |
1448 | INT64 ImmData64;\r | |
1449 | UINT64 Op1;\r | |
1450 | UINT64 Mask64;\r | |
1451 | \r | |
1452 | //\r | |
1453 | // Get the opcode and operands byte so we can get R1 and R2\r | |
1454 | //\r | |
1455 | Opcode = GETOPCODE (VmPtr);\r | |
1456 | Operands = GETOPERANDS (VmPtr);\r | |
1457 | \r | |
1458 | //\r | |
1459 | // Get the index (16-bit) if present\r | |
1460 | //\r | |
1461 | if (Operands & MOVI_M_IMMDATA) {\r | |
1462 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1463 | Size = 4;\r | |
1464 | } else {\r | |
1465 | Index16 = 0;\r | |
1466 | Size = 2;\r | |
1467 | }\r | |
1468 | //\r | |
1469 | // Extract the immediate data. Sign-extend always.\r | |
1470 | //\r | |
1471 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
1472 | ImmData64 = (INT64) (INT16) VmReadImmed16 (VmPtr, Size);\r | |
1473 | Size += 2;\r | |
1474 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
1475 | ImmData64 = (INT64) (INT32) VmReadImmed32 (VmPtr, Size);\r | |
1476 | Size += 4;\r | |
1477 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
1478 | ImmData64 = (INT64) VmReadImmed64 (VmPtr, Size);\r | |
1479 | Size += 8;\r | |
1480 | } else {\r | |
1481 | //\r | |
1482 | // Invalid encoding\r | |
1483 | //\r | |
1484 | EbcDebugSignalException (\r | |
1485 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1486 | EXCEPTION_FLAG_FATAL,\r | |
1487 | VmPtr\r | |
1488 | );\r | |
1489 | return EFI_UNSUPPORTED;\r | |
1490 | }\r | |
1491 | //\r | |
1492 | // Now write back the result\r | |
1493 | //\r | |
1494 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1495 | //\r | |
1496 | // Operand1 direct. Make sure it didn't have an index.\r | |
1497 | //\r | |
1498 | if (Operands & MOVI_M_IMMDATA) {\r | |
1499 | EbcDebugSignalException (\r | |
1500 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1501 | EXCEPTION_FLAG_FATAL,\r | |
1502 | VmPtr\r | |
1503 | );\r | |
1504 | return EFI_UNSUPPORTED;\r | |
1505 | }\r | |
1506 | //\r | |
1507 | // Writing directly to a register. Clear unused bits.\r | |
1508 | //\r | |
1509 | if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH8) {\r | |
1510 | Mask64 = 0x000000FF;\r | |
1511 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH16) {\r | |
1512 | Mask64 = 0x0000FFFF;\r | |
1513 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH32) {\r | |
1514 | Mask64 = 0x00000000FFFFFFFF;\r | |
1515 | } else {\r | |
1516 | Mask64 = (UINT64)~0;\r | |
1517 | }\r | |
1518 | \r | |
1519 | VmPtr->R[OPERAND1_REGNUM (Operands)] = ImmData64 & Mask64;\r | |
1520 | } else {\r | |
1521 | //\r | |
1522 | // Get the address then write back based on size of the move\r | |
1523 | //\r | |
1524 | Op1 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
1525 | if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH8) {\r | |
1526 | VmWriteMem8 (VmPtr, (UINTN) Op1, (UINT8) ImmData64);\r | |
1527 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH16) {\r | |
1528 | VmWriteMem16 (VmPtr, (UINTN) Op1, (UINT16) ImmData64);\r | |
1529 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH32) {\r | |
1530 | VmWriteMem32 (VmPtr, (UINTN) Op1, (UINT32) ImmData64);\r | |
1531 | } else {\r | |
1532 | VmWriteMem64 (VmPtr, (UINTN) Op1, ImmData64);\r | |
1533 | }\r | |
1534 | }\r | |
1535 | //\r | |
1536 | // Advance the instruction pointer\r | |
1537 | //\r | |
1538 | VmPtr->Ip += Size;\r | |
1539 | return EFI_SUCCESS;\r | |
1540 | }\r | |
1541 | \r | |
1542 | STATIC\r | |
1543 | EFI_STATUS\r | |
1544 | ExecuteMOVIn (\r | |
1545 | IN VM_CONTEXT *VmPtr\r | |
1546 | )\r | |
1547 | /*++\r | |
1548 | \r | |
1549 | Routine Description:\r | |
1550 | \r | |
1551 | Execute the EBC MOV immediate natural. This instruction moves an immediate\r | |
1552 | index value into a register or memory location.\r | |
1553 | \r | |
1554 | Arguments:\r | |
1555 | \r | |
1556 | VmPtr - pointer to a VM context \r | |
1557 | \r | |
1558 | Returns:\r | |
1559 | \r | |
1560 | Standard EFI_STATUS\r | |
1561 | \r | |
1562 | Instruction syntax:\r | |
1563 | \r | |
1564 | MOVIn[w|d|q] {@}R1 {Index16}, Index16|32|64\r | |
1565 | \r | |
1566 | --*/\r | |
1567 | {\r | |
1568 | UINT8 Opcode;\r | |
1569 | UINT8 Operands;\r | |
1570 | UINT8 Size;\r | |
1571 | INT16 Index16;\r | |
1572 | INT16 ImmedIndex16;\r | |
1573 | INT32 ImmedIndex32;\r | |
1574 | INT64 ImmedIndex64;\r | |
1575 | UINT64 Op1;\r | |
1576 | \r | |
1577 | //\r | |
1578 | // Get the opcode and operands byte so we can get R1 and R2\r | |
1579 | //\r | |
1580 | Opcode = GETOPCODE (VmPtr);\r | |
1581 | Operands = GETOPERANDS (VmPtr);\r | |
1582 | \r | |
1583 | //\r | |
1584 | // Get the operand1 index (16-bit) if present\r | |
1585 | //\r | |
1586 | if (Operands & MOVI_M_IMMDATA) {\r | |
1587 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1588 | Size = 4;\r | |
1589 | } else {\r | |
1590 | Index16 = 0;\r | |
1591 | Size = 2;\r | |
1592 | }\r | |
1593 | //\r | |
1594 | // Extract the immediate data and convert to a 64-bit index.\r | |
1595 | //\r | |
1596 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
1597 | ImmedIndex16 = VmReadIndex16 (VmPtr, Size);\r | |
1598 | ImmedIndex64 = (INT64) ImmedIndex16;\r | |
1599 | Size += 2;\r | |
1600 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
1601 | ImmedIndex32 = VmReadIndex32 (VmPtr, Size);\r | |
1602 | ImmedIndex64 = (INT64) ImmedIndex32;\r | |
1603 | Size += 4;\r | |
1604 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
1605 | ImmedIndex64 = VmReadIndex64 (VmPtr, Size);\r | |
1606 | Size += 8;\r | |
1607 | } else {\r | |
1608 | //\r | |
1609 | // Invalid encoding\r | |
1610 | //\r | |
1611 | EbcDebugSignalException (\r | |
1612 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1613 | EXCEPTION_FLAG_FATAL,\r | |
1614 | VmPtr\r | |
1615 | );\r | |
1616 | return EFI_UNSUPPORTED;\r | |
1617 | }\r | |
1618 | //\r | |
1619 | // Now write back the result\r | |
1620 | //\r | |
1621 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1622 | //\r | |
1623 | // Check for MOVIn R1 Index16, Immed (not indirect, with index), which\r | |
1624 | // is illegal\r | |
1625 | //\r | |
1626 | if (Operands & MOVI_M_IMMDATA) {\r | |
1627 | EbcDebugSignalException (\r | |
1628 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1629 | EXCEPTION_FLAG_FATAL,\r | |
1630 | VmPtr\r | |
1631 | );\r | |
1632 | return EFI_UNSUPPORTED;\r | |
1633 | }\r | |
1634 | \r | |
1635 | VmPtr->R[OPERAND1_REGNUM (Operands)] = ImmedIndex64;\r | |
1636 | } else {\r | |
1637 | //\r | |
1638 | // Get the address\r | |
1639 | //\r | |
1640 | Op1 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
1641 | VmWriteMemN (VmPtr, (UINTN) Op1, (INTN) ImmedIndex64);\r | |
1642 | }\r | |
1643 | //\r | |
1644 | // Advance the instruction pointer\r | |
1645 | //\r | |
1646 | VmPtr->Ip += Size;\r | |
1647 | return EFI_SUCCESS;\r | |
1648 | }\r | |
1649 | \r | |
1650 | STATIC\r | |
1651 | EFI_STATUS\r | |
1652 | ExecuteMOVREL (\r | |
1653 | IN VM_CONTEXT *VmPtr\r | |
1654 | )\r | |
1655 | /*++\r | |
1656 | \r | |
1657 | Routine Description:\r | |
1658 | \r | |
1659 | Execute the EBC MOVREL instruction.\r | |
1660 | Dest <- Ip + ImmData\r | |
1661 | \r | |
1662 | Arguments:\r | |
1663 | \r | |
1664 | VmPtr - pointer to a VM context \r | |
1665 | \r | |
1666 | Returns:\r | |
1667 | \r | |
1668 | Standard EFI_STATUS\r | |
1669 | \r | |
1670 | Instruction syntax:\r | |
1671 | \r | |
1672 | MOVREL[w|d|q] {@}R1 {Index16}, ImmData16|32|64\r | |
1673 | \r | |
1674 | --*/\r | |
1675 | {\r | |
1676 | UINT8 Opcode;\r | |
1677 | UINT8 Operands;\r | |
1678 | UINT8 Size;\r | |
1679 | INT16 Index16;\r | |
1680 | INT64 ImmData64;\r | |
1681 | UINT64 Op1;\r | |
1682 | UINT64 Op2;\r | |
1683 | \r | |
1684 | //\r | |
1685 | // Get the opcode and operands byte so we can get R1 and R2\r | |
1686 | //\r | |
1687 | Opcode = GETOPCODE (VmPtr);\r | |
1688 | Operands = GETOPERANDS (VmPtr);\r | |
1689 | \r | |
1690 | //\r | |
1691 | // Get the Operand 1 index (16-bit) if present\r | |
1692 | //\r | |
1693 | if (Operands & MOVI_M_IMMDATA) {\r | |
1694 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1695 | Size = 4;\r | |
1696 | } else {\r | |
1697 | Index16 = 0;\r | |
1698 | Size = 2;\r | |
1699 | }\r | |
1700 | //\r | |
1701 | // Get the immediate data.\r | |
1702 | //\r | |
1703 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
1704 | ImmData64 = (INT64) VmReadImmed16 (VmPtr, Size);\r | |
1705 | Size += 2;\r | |
1706 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
1707 | ImmData64 = (INT64) VmReadImmed32 (VmPtr, Size);\r | |
1708 | Size += 4;\r | |
1709 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
1710 | ImmData64 = VmReadImmed64 (VmPtr, Size);\r | |
1711 | Size += 8;\r | |
1712 | } else {\r | |
1713 | //\r | |
1714 | // Invalid encoding\r | |
1715 | //\r | |
1716 | EbcDebugSignalException (\r | |
1717 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1718 | EXCEPTION_FLAG_FATAL,\r | |
1719 | VmPtr\r | |
1720 | );\r | |
1721 | return EFI_UNSUPPORTED;\r | |
1722 | }\r | |
1723 | //\r | |
1724 | // Compute the value and write back the result\r | |
1725 | //\r | |
1726 | Op2 = (UINT64) ((INT64) ((UINT64) (UINTN) VmPtr->Ip) + (INT64) ImmData64 + Size);\r | |
1727 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1728 | //\r | |
1729 | // Check for illegal combination of operand1 direct with immediate data\r | |
1730 | //\r | |
1731 | if (Operands & MOVI_M_IMMDATA) {\r | |
1732 | EbcDebugSignalException (\r | |
1733 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1734 | EXCEPTION_FLAG_FATAL,\r | |
1735 | VmPtr\r | |
1736 | );\r | |
1737 | return EFI_UNSUPPORTED;\r | |
1738 | }\r | |
1739 | \r | |
1740 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (VM_REGISTER) Op2;\r | |
1741 | } else {\r | |
1742 | //\r | |
1743 | // Get the address = [Rx] + Index16\r | |
1744 | // Write back the result. Always a natural size write, since\r | |
1745 | // we're talking addresses here.\r | |
1746 | //\r | |
1747 | Op1 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
1748 | VmWriteMemN (VmPtr, (UINTN) Op1, (UINTN) Op2);\r | |
1749 | }\r | |
1750 | //\r | |
1751 | // Advance the instruction pointer\r | |
1752 | //\r | |
1753 | VmPtr->Ip += Size;\r | |
1754 | return EFI_SUCCESS;\r | |
1755 | }\r | |
1756 | \r | |
1757 | STATIC\r | |
1758 | EFI_STATUS\r | |
1759 | ExecuteMOVsnw (\r | |
1760 | IN VM_CONTEXT *VmPtr\r | |
1761 | )\r | |
1762 | /*++\r | |
1763 | \r | |
1764 | Routine Description:\r | |
1765 | \r | |
1766 | Execute the EBC MOVsnw instruction. This instruction loads a signed \r | |
1767 | natural value from memory or register to another memory or register. On\r | |
1768 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
1769 | is a register.\r | |
1770 | \r | |
1771 | Arguments:\r | |
1772 | \r | |
1773 | VmPtr - pointer to a VM context \r | |
1774 | \r | |
1775 | Returns:\r | |
1776 | \r | |
1777 | Standard EFI_STATUS\r | |
1778 | \r | |
1779 | Instruction syntax:\r | |
1780 | \r | |
1781 | MOVsnw {@}R1 {Index16}, {@}R2 {Index16|Immed16}\r | |
1782 | \r | |
1783 | 0:7 1=>operand1 index present\r | |
1784 | 0:6 1=>operand2 index present\r | |
1785 | \r | |
1786 | --*/\r | |
1787 | {\r | |
1788 | UINT8 Opcode;\r | |
1789 | UINT8 Operands;\r | |
1790 | UINT8 Size;\r | |
1791 | INT16 Op1Index;\r | |
1792 | INT16 Op2Index;\r | |
1793 | UINT64 Op2;\r | |
1794 | \r | |
1795 | //\r | |
1796 | // Get the opcode and operand bytes\r | |
1797 | //\r | |
1798 | Opcode = GETOPCODE (VmPtr);\r | |
1799 | Operands = GETOPERANDS (VmPtr);\r | |
1800 | \r | |
1801 | Op1Index = Op2Index = 0;\r | |
1802 | \r | |
1803 | //\r | |
1804 | // Get the indexes if present.\r | |
1805 | //\r | |
1806 | Size = 2;\r | |
1807 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
1808 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1809 | Op1Index = VmReadIndex16 (VmPtr, 2);\r | |
1810 | } else {\r | |
1811 | //\r | |
1812 | // Illegal form operand1 direct with index: MOVsnw R1 Index16, {@}R2\r | |
1813 | //\r | |
1814 | EbcDebugSignalException (\r | |
1815 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1816 | EXCEPTION_FLAG_FATAL,\r | |
1817 | VmPtr\r | |
1818 | );\r | |
1819 | return EFI_UNSUPPORTED;\r | |
1820 | }\r | |
1821 | \r | |
1822 | Size += sizeof (UINT16);\r | |
1823 | }\r | |
1824 | \r | |
1825 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
1826 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1827 | Op2Index = VmReadIndex16 (VmPtr, Size);\r | |
1828 | } else {\r | |
1829 | Op2Index = VmReadImmed16 (VmPtr, Size);\r | |
1830 | }\r | |
1831 | \r | |
1832 | Size += sizeof (UINT16);\r | |
1833 | }\r | |
1834 | //\r | |
1835 | // Get the data from the source.\r | |
1836 | //\r | |
1837 | Op2 = (INT64) ((INTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Op2Index));\r | |
1838 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1839 | Op2 = (INT64) (INTN) VmReadMemN (VmPtr, (UINTN) Op2);\r | |
1840 | }\r | |
1841 | //\r | |
1842 | // Now write back the result.\r | |
1843 | //\r | |
1844 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1845 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Op2;\r | |
1846 | } else {\r | |
1847 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Op1Index), (UINTN) Op2);\r | |
1848 | }\r | |
1849 | //\r | |
1850 | // Advance the instruction pointer\r | |
1851 | //\r | |
1852 | VmPtr->Ip += Size;\r | |
1853 | return EFI_SUCCESS;\r | |
1854 | }\r | |
1855 | \r | |
1856 | STATIC\r | |
1857 | EFI_STATUS\r | |
1858 | ExecuteMOVsnd (\r | |
1859 | IN VM_CONTEXT *VmPtr\r | |
1860 | )\r | |
1861 | /*++\r | |
1862 | \r | |
1863 | Routine Description:\r | |
1864 | \r | |
1865 | Execute the EBC MOVsnw instruction. This instruction loads a signed \r | |
1866 | natural value from memory or register to another memory or register. On\r | |
1867 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
1868 | is a register.\r | |
1869 | \r | |
1870 | Arguments:\r | |
1871 | \r | |
1872 | VmPtr - pointer to a VM context \r | |
1873 | \r | |
1874 | Returns:\r | |
1875 | \r | |
1876 | Standard EFI_STATUS\r | |
1877 | \r | |
1878 | Instruction syntax:\r | |
1879 | \r | |
1880 | MOVsnd {@}R1 {Indx32}, {@}R2 {Index32|Immed32}\r | |
1881 | \r | |
1882 | 0:7 1=>operand1 index present\r | |
1883 | 0:6 1=>operand2 index present\r | |
1884 | \r | |
1885 | --*/\r | |
1886 | {\r | |
1887 | UINT8 Opcode;\r | |
1888 | UINT8 Operands;\r | |
1889 | UINT8 Size;\r | |
1890 | INT32 Op1Index;\r | |
1891 | INT32 Op2Index;\r | |
1892 | UINT64 Op2;\r | |
1893 | \r | |
1894 | //\r | |
1895 | // Get the opcode and operand bytes\r | |
1896 | //\r | |
1897 | Opcode = GETOPCODE (VmPtr);\r | |
1898 | Operands = GETOPERANDS (VmPtr);\r | |
1899 | \r | |
1900 | Op1Index = Op2Index = 0;\r | |
1901 | \r | |
1902 | //\r | |
1903 | // Get the indexes if present.\r | |
1904 | //\r | |
1905 | Size = 2;\r | |
1906 | if (Opcode & OPCODE_M_IMMED_OP1) {\r | |
1907 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1908 | Op1Index = VmReadIndex32 (VmPtr, 2);\r | |
1909 | } else {\r | |
1910 | //\r | |
1911 | // Illegal form operand1 direct with index: MOVsnd R1 Index16,..\r | |
1912 | //\r | |
1913 | EbcDebugSignalException (\r | |
1914 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1915 | EXCEPTION_FLAG_FATAL,\r | |
1916 | VmPtr\r | |
1917 | );\r | |
1918 | return EFI_UNSUPPORTED;\r | |
1919 | }\r | |
1920 | \r | |
1921 | Size += sizeof (UINT32);\r | |
1922 | }\r | |
1923 | \r | |
1924 | if (Opcode & OPCODE_M_IMMED_OP2) {\r | |
1925 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1926 | Op2Index = VmReadIndex32 (VmPtr, Size);\r | |
1927 | } else {\r | |
1928 | Op2Index = VmReadImmed32 (VmPtr, Size);\r | |
1929 | }\r | |
1930 | \r | |
1931 | Size += sizeof (UINT32);\r | |
1932 | }\r | |
1933 | //\r | |
1934 | // Get the data from the source.\r | |
1935 | //\r | |
1936 | Op2 = (INT64) ((INTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Op2Index));\r | |
1937 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1938 | Op2 = (INT64) (INTN) VmReadMemN (VmPtr, (UINTN) Op2);\r | |
1939 | }\r | |
1940 | //\r | |
1941 | // Now write back the result.\r | |
1942 | //\r | |
1943 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1944 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Op2;\r | |
1945 | } else {\r | |
1946 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Op1Index), (UINTN) Op2);\r | |
1947 | }\r | |
1948 | //\r | |
1949 | // Advance the instruction pointer\r | |
1950 | //\r | |
1951 | VmPtr->Ip += Size;\r | |
1952 | return EFI_SUCCESS;\r | |
1953 | }\r | |
1954 | \r | |
1955 | STATIC\r | |
1956 | EFI_STATUS\r | |
1957 | ExecutePUSHn (\r | |
1958 | IN VM_CONTEXT *VmPtr\r | |
1959 | )\r | |
1960 | /*++\r | |
1961 | \r | |
1962 | Routine Description:\r | |
1963 | Execute the EBC PUSHn instruction\r | |
1964 | \r | |
1965 | Arguments:\r | |
1966 | VmPtr - pointer to a VM context \r | |
1967 | \r | |
1968 | Returns:\r | |
1969 | Standard EFI_STATUS\r | |
1970 | \r | |
1971 | Instruction syntax:\r | |
1972 | PUSHn {@}R1 {Index16|Immed16}\r | |
1973 | \r | |
1974 | --*/\r | |
1975 | {\r | |
1976 | UINT8 Opcode;\r | |
1977 | UINT8 Operands;\r | |
1978 | INT16 Index16;\r | |
1979 | UINTN DataN;\r | |
1980 | \r | |
1981 | //\r | |
1982 | // Get opcode and operands\r | |
1983 | //\r | |
1984 | Opcode = GETOPCODE (VmPtr);\r | |
1985 | Operands = GETOPERANDS (VmPtr);\r | |
1986 | \r | |
1987 | //\r | |
1988 | // Get index if present\r | |
1989 | //\r | |
1990 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
1991 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1992 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1993 | } else {\r | |
1994 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
1995 | }\r | |
1996 | \r | |
1997 | VmPtr->Ip += 4;\r | |
1998 | } else {\r | |
1999 | Index16 = 0;\r | |
2000 | VmPtr->Ip += 2;\r | |
2001 | }\r | |
2002 | //\r | |
2003 | // Get the data to push\r | |
2004 | //\r | |
2005 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2006 | DataN = VmReadMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2007 | } else {\r | |
2008 | DataN = (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16);\r | |
2009 | }\r | |
2010 | //\r | |
2011 | // Adjust the stack down.\r | |
2012 | //\r | |
2013 | VmPtr->R[0] -= sizeof (UINTN);\r | |
2014 | VmWriteMemN (VmPtr, (UINTN) VmPtr->R[0], DataN);\r | |
2015 | return EFI_SUCCESS;\r | |
2016 | }\r | |
2017 | \r | |
2018 | STATIC\r | |
2019 | EFI_STATUS\r | |
2020 | ExecutePUSH (\r | |
2021 | IN VM_CONTEXT *VmPtr\r | |
2022 | )\r | |
2023 | /*++\r | |
2024 | \r | |
2025 | Routine Description:\r | |
2026 | Execute the EBC PUSH instruction\r | |
2027 | \r | |
2028 | Arguments:\r | |
2029 | VmPtr - pointer to a VM context \r | |
2030 | \r | |
2031 | Returns:\r | |
2032 | Standard EFI_STATUS\r | |
2033 | \r | |
2034 | Instruction syntax:\r | |
2035 | PUSH[32|64] {@}R1 {Index16|Immed16}\r | |
2036 | \r | |
2037 | --*/\r | |
2038 | {\r | |
2039 | UINT8 Opcode;\r | |
2040 | UINT8 Operands;\r | |
2041 | UINT32 Data32;\r | |
2042 | UINT64 Data64;\r | |
2043 | INT16 Index16;\r | |
2044 | \r | |
2045 | //\r | |
2046 | // Get opcode and operands\r | |
2047 | //\r | |
2048 | Opcode = GETOPCODE (VmPtr);\r | |
2049 | Operands = GETOPERANDS (VmPtr);\r | |
2050 | //\r | |
2051 | // Get immediate index if present, then advance the IP.\r | |
2052 | //\r | |
2053 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
2054 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2055 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2056 | } else {\r | |
2057 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2058 | }\r | |
2059 | \r | |
2060 | VmPtr->Ip += 4;\r | |
2061 | } else {\r | |
2062 | Index16 = 0;\r | |
2063 | VmPtr->Ip += 2;\r | |
2064 | }\r | |
2065 | //\r | |
2066 | // Get the data to push\r | |
2067 | //\r | |
2068 | if (Opcode & PUSHPOP_M_64) {\r | |
2069 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2070 | Data64 = VmReadMem64 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2071 | } else {\r | |
2072 | Data64 = (UINT64) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2073 | }\r | |
2074 | //\r | |
2075 | // Adjust the stack down, then write back the data\r | |
2076 | //\r | |
2077 | VmPtr->R[0] -= sizeof (UINT64);\r | |
2078 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[0], Data64);\r | |
2079 | } else {\r | |
2080 | //\r | |
2081 | // 32-bit data\r | |
2082 | //\r | |
2083 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2084 | Data32 = VmReadMem32 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2085 | } else {\r | |
2086 | Data32 = (UINT32) VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2087 | }\r | |
2088 | //\r | |
2089 | // Adjust the stack down and write the data\r | |
2090 | //\r | |
2091 | VmPtr->R[0] -= sizeof (UINT32);\r | |
2092 | VmWriteMem32 (VmPtr, (UINTN) VmPtr->R[0], Data32);\r | |
2093 | }\r | |
2094 | \r | |
2095 | return EFI_SUCCESS;\r | |
2096 | }\r | |
2097 | \r | |
2098 | STATIC\r | |
2099 | EFI_STATUS\r | |
2100 | ExecutePOPn (\r | |
2101 | IN VM_CONTEXT *VmPtr\r | |
2102 | )\r | |
2103 | /*++\r | |
2104 | \r | |
2105 | Routine Description:\r | |
2106 | Execute the EBC POPn instruction\r | |
2107 | \r | |
2108 | Arguments:\r | |
2109 | VmPtr - pointer to a VM context \r | |
2110 | \r | |
2111 | Returns:\r | |
2112 | Standard EFI_STATUS\r | |
2113 | \r | |
2114 | Instruction syntax:\r | |
2115 | POPn {@}R1 {Index16|Immed16}\r | |
2116 | \r | |
2117 | --*/\r | |
2118 | {\r | |
2119 | UINT8 Opcode;\r | |
2120 | UINT8 Operands;\r | |
2121 | INT16 Index16;\r | |
2122 | UINTN DataN;\r | |
2123 | \r | |
2124 | //\r | |
2125 | // Get opcode and operands\r | |
2126 | //\r | |
2127 | Opcode = GETOPCODE (VmPtr);\r | |
2128 | Operands = GETOPERANDS (VmPtr);\r | |
2129 | //\r | |
2130 | // Get immediate data if present, and advance the IP\r | |
2131 | //\r | |
2132 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
2133 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2134 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2135 | } else {\r | |
2136 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2137 | }\r | |
2138 | \r | |
2139 | VmPtr->Ip += 4;\r | |
2140 | } else {\r | |
2141 | Index16 = 0;\r | |
2142 | VmPtr->Ip += 2;\r | |
2143 | }\r | |
2144 | //\r | |
2145 | // Read the data off the stack, then adjust the stack pointer\r | |
2146 | //\r | |
2147 | DataN = VmReadMemN (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2148 | VmPtr->R[0] += sizeof (UINTN);\r | |
2149 | //\r | |
2150 | // Do the write-back\r | |
2151 | //\r | |
2152 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2153 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16), DataN);\r | |
2154 | } else {\r | |
2155 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (INT64) (UINT64) ((UINTN) DataN + Index16);\r | |
2156 | }\r | |
2157 | \r | |
2158 | return EFI_SUCCESS;\r | |
2159 | }\r | |
2160 | \r | |
2161 | STATIC\r | |
2162 | EFI_STATUS\r | |
2163 | ExecutePOP (\r | |
2164 | IN VM_CONTEXT *VmPtr\r | |
2165 | )\r | |
2166 | /*++\r | |
2167 | \r | |
2168 | Routine Description:\r | |
2169 | Execute the EBC POP instruction\r | |
2170 | \r | |
2171 | Arguments:\r | |
2172 | VmPtr - pointer to a VM context \r | |
2173 | \r | |
2174 | Returns:\r | |
2175 | Standard EFI_STATUS\r | |
2176 | \r | |
2177 | Instruction syntax:\r | |
2178 | POP {@}R1 {Index16|Immed16}\r | |
2179 | \r | |
2180 | --*/\r | |
2181 | {\r | |
2182 | UINT8 Opcode;\r | |
2183 | UINT8 Operands;\r | |
2184 | INT16 Index16;\r | |
2185 | INT32 Data32;\r | |
2186 | UINT64 Data64;\r | |
2187 | \r | |
2188 | //\r | |
2189 | // Get opcode and operands\r | |
2190 | //\r | |
2191 | Opcode = GETOPCODE (VmPtr);\r | |
2192 | Operands = GETOPERANDS (VmPtr);\r | |
2193 | //\r | |
2194 | // Get immediate data if present, and advance the IP.\r | |
2195 | //\r | |
2196 | if (Opcode & PUSHPOP_M_IMMDATA) {\r | |
2197 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2198 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2199 | } else {\r | |
2200 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2201 | }\r | |
2202 | \r | |
2203 | VmPtr->Ip += 4;\r | |
2204 | } else {\r | |
2205 | Index16 = 0;\r | |
2206 | VmPtr->Ip += 2;\r | |
2207 | }\r | |
2208 | //\r | |
2209 | // Get the data off the stack, then write it to the appropriate location\r | |
2210 | //\r | |
2211 | if (Opcode & PUSHPOP_M_64) {\r | |
2212 | //\r | |
2213 | // Read the data off the stack, then adjust the stack pointer\r | |
2214 | //\r | |
2215 | Data64 = VmReadMem64 (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2216 | VmPtr->R[0] += sizeof (UINT64);\r | |
2217 | //\r | |
2218 | // Do the write-back\r | |
2219 | //\r | |
2220 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2221 | VmWriteMem64 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16), Data64);\r | |
2222 | } else {\r | |
2223 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Data64 + Index16;\r | |
2224 | }\r | |
2225 | } else {\r | |
2226 | //\r | |
2227 | // 32-bit pop. Read it off the stack and adjust the stack pointer\r | |
2228 | //\r | |
2229 | Data32 = (INT32) VmReadMem32 (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2230 | VmPtr->R[0] += sizeof (UINT32);\r | |
2231 | //\r | |
2232 | // Do the write-back\r | |
2233 | //\r | |
2234 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2235 | VmWriteMem32 (VmPtr, (UINTN) (VmPtr->R[OPERAND1_REGNUM (Operands)] + Index16), Data32);\r | |
2236 | } else {\r | |
2237 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (INT64) Data32 + Index16;\r | |
2238 | }\r | |
2239 | }\r | |
2240 | \r | |
2241 | return EFI_SUCCESS;\r | |
2242 | }\r | |
2243 | \r | |
2244 | STATIC\r | |
2245 | EFI_STATUS\r | |
2246 | ExecuteCALL (\r | |
2247 | IN VM_CONTEXT *VmPtr\r | |
2248 | )\r | |
2249 | /*++\r | |
2250 | \r | |
2251 | Routine Description:\r | |
2252 | Implements the EBC CALL instruction.\r | |
2253 | \r | |
2254 | Instruction format: \r | |
2255 | \r | |
2256 | CALL64 Immed64\r | |
2257 | CALL32 {@}R1 {Immed32|Index32}\r | |
2258 | CALLEX64 Immed64\r | |
2259 | CALLEX16 {@}R1 {Immed32}\r | |
2260 | \r | |
2261 | If Rx == R0, then it's a PC relative call to PC = PC + imm32.\r | |
2262 | \r | |
2263 | Arguments:\r | |
2264 | VmPtr - pointer to a VM context.\r | |
2265 | \r | |
2266 | Returns:\r | |
2267 | Standard EFI_STATUS\r | |
2268 | \r | |
2269 | --*/\r | |
2270 | {\r | |
2271 | UINT8 Opcode;\r | |
2272 | UINT8 Operands;\r | |
2273 | INT32 Immed32;\r | |
2274 | UINT8 Size;\r | |
2275 | INT64 Immed64;\r | |
2276 | VOID *FramePtr;\r | |
2277 | \r | |
2278 | //\r | |
2279 | // Get opcode and operands\r | |
2280 | //\r | |
2281 | Opcode = GETOPCODE (VmPtr);\r | |
2282 | Operands = GETOPERANDS (VmPtr);\r | |
2283 | //\r | |
2284 | // Assign these as well to avoid compiler warnings\r | |
2285 | //\r | |
2286 | Immed64 = 0;\r | |
2287 | Immed32 = 0;\r | |
2288 | \r | |
2289 | FramePtr = VmPtr->FramePtr;\r | |
2290 | //\r | |
2291 | // Determine the instruction size, and get immediate data if present\r | |
2292 | //\r | |
2293 | if (Opcode & OPCODE_M_IMMDATA) {\r | |
2294 | if (Opcode & OPCODE_M_IMMDATA64) {\r | |
2295 | Immed64 = VmReadImmed64 (VmPtr, 2);\r | |
2296 | Size = 10;\r | |
2297 | } else {\r | |
2298 | //\r | |
2299 | // If register operand is indirect, then the immediate data is an index\r | |
2300 | //\r | |
2301 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2302 | Immed32 = VmReadIndex32 (VmPtr, 2);\r | |
2303 | } else {\r | |
2304 | Immed32 = VmReadImmed32 (VmPtr, 2);\r | |
2305 | }\r | |
2306 | \r | |
2307 | Size = 6;\r | |
2308 | }\r | |
2309 | } else {\r | |
2310 | Size = 2;\r | |
2311 | }\r | |
2312 | //\r | |
2313 | // If it's a call to EBC, adjust the stack pointer down 16 bytes and\r | |
2314 | // put our return address and frame pointer on the VM stack.\r | |
2315 | //\r | |
2316 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
2317 | VmPtr->R[0] -= 8;\r | |
2318 | VmWriteMemN (VmPtr, (UINTN) VmPtr->R[0], (UINTN) FramePtr);\r | |
2319 | VmPtr->FramePtr = (VOID *) (UINTN) VmPtr->R[0];\r | |
2320 | VmPtr->R[0] -= 8;\r | |
2321 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->R[0], (UINT64) (UINTN) (VmPtr->Ip + Size));\r | |
2322 | }\r | |
2323 | //\r | |
2324 | // If 64-bit data, then absolute jump only\r | |
2325 | //\r | |
2326 | if (Opcode & OPCODE_M_IMMDATA64) {\r | |
2327 | //\r | |
2328 | // Native or EBC call?\r | |
2329 | //\r | |
2330 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
2331 | VmPtr->Ip = (VMIP) (UINTN) Immed64;\r | |
2332 | } else {\r | |
2333 | //\r | |
2334 | // Call external function, get the return value, and advance the IP\r | |
2335 | //\r | |
2336 | EbcLLCALLEX (VmPtr, (UINTN) Immed64, (UINTN) VmPtr->R[0], FramePtr, Size);\r | |
2337 | }\r | |
2338 | } else {\r | |
2339 | //\r | |
2340 | // Get the register data. If operand1 == 0, then ignore register and\r | |
2341 | // take immediate data as relative or absolute address.\r | |
2342 | // Compiler should take care of upper bits if 32-bit machine.\r | |
2343 | //\r | |
2344 | if (OPERAND1_REGNUM (Operands) != 0) {\r | |
2345 | Immed64 = (UINT64) (UINTN) VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
2346 | }\r | |
2347 | //\r | |
2348 | // Get final address\r | |
2349 | //\r | |
2350 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2351 | Immed64 = (INT64) (UINT64) (UINTN) VmReadMemN (VmPtr, (UINTN) (Immed64 + Immed32));\r | |
2352 | } else {\r | |
2353 | Immed64 += Immed32;\r | |
2354 | }\r | |
2355 | //\r | |
2356 | // Now determine if external call, and then if relative or absolute\r | |
2357 | //\r | |
2358 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
2359 | //\r | |
2360 | // EBC call. Relative or absolute? If relative, then it's relative to the\r | |
2361 | // start of the next instruction.\r | |
2362 | //\r | |
2363 | if (Operands & OPERAND_M_RELATIVE_ADDR) {\r | |
2364 | VmPtr->Ip += Immed64 + Size;\r | |
2365 | } else {\r | |
2366 | VmPtr->Ip = (VMIP) (UINTN) Immed64;\r | |
2367 | }\r | |
2368 | } else {\r | |
2369 | //\r | |
2370 | // Native call. Relative or absolute?\r | |
2371 | //\r | |
2372 | if (Operands & OPERAND_M_RELATIVE_ADDR) {\r | |
2373 | EbcLLCALLEX (VmPtr, (UINTN) (Immed64 + VmPtr->Ip + Size), (UINTN) VmPtr->R[0], FramePtr, Size);\r | |
2374 | } else {\r | |
2375 | if (VmPtr->StopFlags & STOPFLAG_BREAK_ON_CALLEX) {\r | |
2376 | CpuBreakpoint ();\r | |
2377 | }\r | |
2378 | \r | |
2379 | EbcLLCALLEX (VmPtr, (UINTN) Immed64, (UINTN) VmPtr->R[0], FramePtr, Size);\r | |
2380 | }\r | |
2381 | }\r | |
2382 | }\r | |
2383 | \r | |
2384 | return EFI_SUCCESS;\r | |
2385 | }\r | |
2386 | \r | |
2387 | STATIC\r | |
2388 | EFI_STATUS\r | |
2389 | ExecuteRET (\r | |
2390 | IN VM_CONTEXT *VmPtr\r | |
2391 | )\r | |
2392 | /*++\r | |
2393 | \r | |
2394 | Routine Description:\r | |
2395 | Execute the EBC RET instruction\r | |
2396 | \r | |
2397 | Arguments:\r | |
2398 | VmPtr - pointer to a VM context \r | |
2399 | \r | |
2400 | Returns:\r | |
2401 | Standard EFI_STATUS\r | |
2402 | \r | |
2403 | Instruction syntax:\r | |
2404 | RET\r | |
2405 | \r | |
2406 | --*/\r | |
2407 | {\r | |
2408 | //\r | |
2409 | // If we're at the top of the stack, then simply set the done\r | |
2410 | // flag and return\r | |
2411 | //\r | |
2412 | if (VmPtr->StackRetAddr == (UINT64) VmPtr->R[0]) {\r | |
2413 | VmPtr->StopFlags |= STOPFLAG_APP_DONE;\r | |
2414 | } else {\r | |
2415 | //\r | |
2416 | // Pull the return address off the VM app's stack and set the IP\r | |
2417 | // to it\r | |
2418 | //\r | |
2419 | if (!IS_ALIGNED ((UINTN) VmPtr->R[0], sizeof (UINT16))) {\r | |
2420 | EbcDebugSignalException (\r | |
2421 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
2422 | EXCEPTION_FLAG_FATAL,\r | |
2423 | VmPtr\r | |
2424 | );\r | |
2425 | }\r | |
2426 | //\r | |
2427 | // Restore the IP and frame pointer from the stack\r | |
2428 | //\r | |
2429 | VmPtr->Ip = (VMIP) (UINTN) VmReadMem64 (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2430 | VmPtr->R[0] += 8;\r | |
2431 | VmPtr->FramePtr = (VOID *) VmReadMemN (VmPtr, (UINTN) VmPtr->R[0]);\r | |
2432 | VmPtr->R[0] += 8;\r | |
2433 | }\r | |
2434 | \r | |
2435 | return EFI_SUCCESS;\r | |
2436 | }\r | |
2437 | \r | |
2438 | STATIC\r | |
2439 | EFI_STATUS\r | |
2440 | ExecuteCMP (\r | |
2441 | IN VM_CONTEXT *VmPtr\r | |
2442 | )\r | |
2443 | /*++\r | |
2444 | \r | |
2445 | Routine Description:\r | |
2446 | Execute the EBC CMP instruction\r | |
2447 | \r | |
2448 | Arguments:\r | |
2449 | VmPtr - pointer to a VM context \r | |
2450 | \r | |
2451 | Returns:\r | |
2452 | Standard EFI_STATUS\r | |
2453 | \r | |
2454 | Instruction syntax:\r | |
2455 | CMP[32|64][eq|lte|gte|ulte|ugte] R1, {@}R2 {Index16|Immed16}\r | |
2456 | \r | |
2457 | --*/\r | |
2458 | {\r | |
2459 | UINT8 Opcode;\r | |
2460 | UINT8 Operands;\r | |
2461 | UINT8 Size;\r | |
2462 | INT16 Index16;\r | |
2463 | UINT32 Flag;\r | |
2464 | INT64 Op2;\r | |
2465 | INT64 Op1;\r | |
2466 | \r | |
2467 | //\r | |
2468 | // Get opcode and operands\r | |
2469 | //\r | |
2470 | Opcode = GETOPCODE (VmPtr);\r | |
2471 | Operands = GETOPERANDS (VmPtr);\r | |
2472 | //\r | |
2473 | // Get the register data we're going to compare to\r | |
2474 | //\r | |
2475 | Op1 = VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
2476 | //\r | |
2477 | // Get immediate data\r | |
2478 | //\r | |
2479 | if (Opcode & OPCODE_M_IMMDATA) {\r | |
2480 | if (OPERAND2_INDIRECT (Operands)) {\r | |
2481 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2482 | } else {\r | |
2483 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2484 | }\r | |
2485 | \r | |
2486 | Size = 4;\r | |
2487 | } else {\r | |
2488 | Index16 = 0;\r | |
2489 | Size = 2;\r | |
2490 | }\r | |
2491 | //\r | |
2492 | // Now get Op2\r | |
2493 | //\r | |
2494 | if (OPERAND2_INDIRECT (Operands)) {\r | |
2495 | if (Opcode & OPCODE_M_64BIT) {\r | |
2496 | Op2 = (INT64) VmReadMem64 (VmPtr, (UINTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16));\r | |
2497 | } else {\r | |
2498 | //\r | |
2499 | // 32-bit operations. 0-extend the values for all cases.\r | |
2500 | //\r | |
2501 | Op2 = (INT64) (UINT64) ((UINT32) VmReadMem32 (VmPtr, (UINTN) (VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16)));\r | |
2502 | }\r | |
2503 | } else {\r | |
2504 | Op2 = VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16;\r | |
2505 | }\r | |
2506 | //\r | |
2507 | // Now do the compare\r | |
2508 | //\r | |
2509 | Flag = 0;\r | |
2510 | if (Opcode & OPCODE_M_64BIT) {\r | |
2511 | //\r | |
2512 | // 64-bit compares\r | |
2513 | //\r | |
2514 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2515 | case OPCODE_CMPEQ:\r | |
2516 | if (Op1 == Op2) {\r | |
2517 | Flag = 1;\r | |
2518 | }\r | |
2519 | break;\r | |
2520 | \r | |
2521 | case OPCODE_CMPLTE:\r | |
2522 | if (Op1 <= Op2) {\r | |
2523 | Flag = 1;\r | |
2524 | }\r | |
2525 | break;\r | |
2526 | \r | |
2527 | case OPCODE_CMPGTE:\r | |
2528 | if (Op1 >= Op2) {\r | |
2529 | Flag = 1;\r | |
2530 | }\r | |
2531 | break;\r | |
2532 | \r | |
2533 | case OPCODE_CMPULTE:\r | |
2534 | if ((UINT64) Op1 <= (UINT64) Op2) {\r | |
2535 | Flag = 1;\r | |
2536 | }\r | |
2537 | break;\r | |
2538 | \r | |
2539 | case OPCODE_CMPUGTE:\r | |
2540 | if ((UINT64) Op1 >= (UINT64) Op2) {\r | |
2541 | Flag = 1;\r | |
2542 | }\r | |
2543 | break;\r | |
2544 | \r | |
2545 | default:\r | |
2546 | ASSERT (0);\r | |
2547 | }\r | |
2548 | } else {\r | |
2549 | //\r | |
2550 | // 32-bit compares\r | |
2551 | //\r | |
2552 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2553 | case OPCODE_CMPEQ:\r | |
2554 | if ((INT32) Op1 == (INT32) Op2) {\r | |
2555 | Flag = 1;\r | |
2556 | }\r | |
2557 | break;\r | |
2558 | \r | |
2559 | case OPCODE_CMPLTE:\r | |
2560 | if ((INT32) Op1 <= (INT32) Op2) {\r | |
2561 | Flag = 1;\r | |
2562 | }\r | |
2563 | break;\r | |
2564 | \r | |
2565 | case OPCODE_CMPGTE:\r | |
2566 | if ((INT32) Op1 >= (INT32) Op2) {\r | |
2567 | Flag = 1;\r | |
2568 | }\r | |
2569 | break;\r | |
2570 | \r | |
2571 | case OPCODE_CMPULTE:\r | |
2572 | if ((UINT32) Op1 <= (UINT32) Op2) {\r | |
2573 | Flag = 1;\r | |
2574 | }\r | |
2575 | break;\r | |
2576 | \r | |
2577 | case OPCODE_CMPUGTE:\r | |
2578 | if ((UINT32) Op1 >= (UINT32) Op2) {\r | |
2579 | Flag = 1;\r | |
2580 | }\r | |
2581 | break;\r | |
2582 | \r | |
2583 | default:\r | |
2584 | ASSERT (0);\r | |
2585 | }\r | |
2586 | }\r | |
2587 | //\r | |
2588 | // Now set the flag accordingly for the comparison\r | |
2589 | //\r | |
2590 | if (Flag) {\r | |
2591 | VMFLAG_SET (VmPtr, VMFLAGS_CC);\r | |
2592 | } else {\r | |
2593 | VMFLAG_CLEAR (VmPtr, VMFLAGS_CC);\r | |
2594 | }\r | |
2595 | //\r | |
2596 | // Advance the IP\r | |
2597 | //\r | |
2598 | VmPtr->Ip += Size;\r | |
2599 | return EFI_SUCCESS;\r | |
2600 | }\r | |
2601 | \r | |
2602 | STATIC\r | |
2603 | EFI_STATUS\r | |
2604 | ExecuteCMPI (\r | |
2605 | IN VM_CONTEXT *VmPtr\r | |
2606 | )\r | |
2607 | /*++\r | |
2608 | \r | |
2609 | Routine Description:\r | |
2610 | Execute the EBC CMPI instruction\r | |
2611 | \r | |
2612 | Arguments:\r | |
2613 | VmPtr - pointer to a VM context \r | |
2614 | \r | |
2615 | Returns:\r | |
2616 | Standard EFI_STATUS\r | |
2617 | \r | |
2618 | Instruction syntax:\r | |
2619 | CMPI[32|64]{w|d}[eq|lte|gte|ulte|ugte] {@}Rx {Index16}, Immed16|Immed32\r | |
2620 | \r | |
2621 | --*/\r | |
2622 | {\r | |
2623 | UINT8 Opcode;\r | |
2624 | UINT8 Operands;\r | |
2625 | UINT8 Size;\r | |
2626 | INT64 Op1;\r | |
2627 | INT64 Op2;\r | |
2628 | INT16 Index16;\r | |
2629 | UINT32 Flag;\r | |
2630 | \r | |
2631 | //\r | |
2632 | // Get opcode and operands\r | |
2633 | //\r | |
2634 | Opcode = GETOPCODE (VmPtr);\r | |
2635 | Operands = GETOPERANDS (VmPtr);\r | |
2636 | \r | |
2637 | //\r | |
2638 | // Get operand1 index if present\r | |
2639 | //\r | |
2640 | Size = 2;\r | |
2641 | if (Operands & OPERAND_M_CMPI_INDEX) {\r | |
2642 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2643 | Size += 2;\r | |
2644 | } else {\r | |
2645 | Index16 = 0;\r | |
2646 | }\r | |
2647 | //\r | |
2648 | // Get operand1 data we're going to compare to\r | |
2649 | //\r | |
2650 | Op1 = (INT64) VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
2651 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2652 | //\r | |
2653 | // Indirect operand1. Fetch 32 or 64-bit value based on compare size.\r | |
2654 | //\r | |
2655 | if (Opcode & OPCODE_M_CMPI64) {\r | |
2656 | Op1 = (INT64) VmReadMem64 (VmPtr, (UINTN) Op1 + Index16);\r | |
2657 | } else {\r | |
2658 | Op1 = (INT64) VmReadMem32 (VmPtr, (UINTN) Op1 + Index16);\r | |
2659 | }\r | |
2660 | } else {\r | |
2661 | //\r | |
2662 | // Better not have been an index with direct. That is, CMPI R1 Index,...\r | |
2663 | // is illegal.\r | |
2664 | //\r | |
2665 | if (Operands & OPERAND_M_CMPI_INDEX) {\r | |
2666 | EbcDebugSignalException (\r | |
2667 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2668 | EXCEPTION_FLAG_ERROR,\r | |
2669 | VmPtr\r | |
2670 | );\r | |
2671 | VmPtr->Ip += Size;\r | |
2672 | return EFI_UNSUPPORTED;\r | |
2673 | }\r | |
2674 | }\r | |
2675 | //\r | |
2676 | // Get immediate data -- 16- or 32-bit sign extended\r | |
2677 | //\r | |
2678 | if (Opcode & OPCODE_M_CMPI32_DATA) {\r | |
2679 | Op2 = (INT64) VmReadImmed32 (VmPtr, Size);\r | |
2680 | Size += 4;\r | |
2681 | } else {\r | |
2682 | //\r | |
2683 | // 16-bit immediate data. Sign extend always.\r | |
2684 | //\r | |
2685 | Op2 = (INT64) ((INT16) VmReadImmed16 (VmPtr, Size));\r | |
2686 | Size += 2;\r | |
2687 | }\r | |
2688 | //\r | |
2689 | // Now do the compare\r | |
2690 | //\r | |
2691 | Flag = 0;\r | |
2692 | if (Opcode & OPCODE_M_CMPI64) {\r | |
2693 | //\r | |
2694 | // 64 bit comparison\r | |
2695 | //\r | |
2696 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2697 | case OPCODE_CMPIEQ:\r | |
2698 | if (Op1 == (INT64) Op2) {\r | |
2699 | Flag = 1;\r | |
2700 | }\r | |
2701 | break;\r | |
2702 | \r | |
2703 | case OPCODE_CMPILTE:\r | |
2704 | if (Op1 <= (INT64) Op2) {\r | |
2705 | Flag = 1;\r | |
2706 | }\r | |
2707 | break;\r | |
2708 | \r | |
2709 | case OPCODE_CMPIGTE:\r | |
2710 | if (Op1 >= (INT64) Op2) {\r | |
2711 | Flag = 1;\r | |
2712 | }\r | |
2713 | break;\r | |
2714 | \r | |
2715 | case OPCODE_CMPIULTE:\r | |
2716 | if ((UINT64) Op1 <= (UINT64) ((UINT32) Op2)) {\r | |
2717 | Flag = 1;\r | |
2718 | }\r | |
2719 | break;\r | |
2720 | \r | |
2721 | case OPCODE_CMPIUGTE:\r | |
2722 | if ((UINT64) Op1 >= (UINT64) ((UINT32) Op2)) {\r | |
2723 | Flag = 1;\r | |
2724 | }\r | |
2725 | break;\r | |
2726 | \r | |
2727 | default:\r | |
2728 | ASSERT (0);\r | |
2729 | }\r | |
2730 | } else {\r | |
2731 | //\r | |
2732 | // 32-bit comparisons\r | |
2733 | //\r | |
2734 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
2735 | case OPCODE_CMPIEQ:\r | |
2736 | if ((INT32) Op1 == Op2) {\r | |
2737 | Flag = 1;\r | |
2738 | }\r | |
2739 | break;\r | |
2740 | \r | |
2741 | case OPCODE_CMPILTE:\r | |
2742 | if ((INT32) Op1 <= Op2) {\r | |
2743 | Flag = 1;\r | |
2744 | }\r | |
2745 | break;\r | |
2746 | \r | |
2747 | case OPCODE_CMPIGTE:\r | |
2748 | if ((INT32) Op1 >= Op2) {\r | |
2749 | Flag = 1;\r | |
2750 | }\r | |
2751 | break;\r | |
2752 | \r | |
2753 | case OPCODE_CMPIULTE:\r | |
2754 | if ((UINT32) Op1 <= (UINT32) Op2) {\r | |
2755 | Flag = 1;\r | |
2756 | }\r | |
2757 | break;\r | |
2758 | \r | |
2759 | case OPCODE_CMPIUGTE:\r | |
2760 | if ((UINT32) Op1 >= (UINT32) Op2) {\r | |
2761 | Flag = 1;\r | |
2762 | }\r | |
2763 | break;\r | |
2764 | \r | |
2765 | default:\r | |
2766 | ASSERT (0);\r | |
2767 | }\r | |
2768 | }\r | |
2769 | //\r | |
2770 | // Now set the flag accordingly for the comparison\r | |
2771 | //\r | |
2772 | if (Flag) {\r | |
2773 | VMFLAG_SET (VmPtr, VMFLAGS_CC);\r | |
2774 | } else {\r | |
2775 | VMFLAG_CLEAR (VmPtr, VMFLAGS_CC);\r | |
2776 | }\r | |
2777 | //\r | |
2778 | // Advance the IP\r | |
2779 | //\r | |
2780 | VmPtr->Ip += Size;\r | |
2781 | return EFI_SUCCESS;\r | |
2782 | }\r | |
2783 | \r | |
2784 | STATIC\r | |
2785 | UINT64\r | |
2786 | ExecuteNOT (\r | |
2787 | IN VM_CONTEXT *VmPtr,\r | |
2788 | IN UINT64 Op1,\r | |
2789 | IN UINT64 Op2\r | |
2790 | )\r | |
2791 | /*++\r | |
2792 | \r | |
2793 | Routine Description:\r | |
2794 | Execute the EBC NOT instruction\r | |
2795 | \r | |
2796 | Arguments:\r | |
2797 | VmPtr - pointer to a VM context \r | |
2798 | Op1 - Operand 1 from the instruction \r | |
2799 | Op2 - Operand 2 from the instruction\r | |
2800 | \r | |
2801 | Returns:\r | |
2802 | ~Op2\r | |
2803 | \r | |
2804 | Instruction syntax:\r | |
2805 | NOT[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2806 | \r | |
2807 | --*/\r | |
2808 | {\r | |
2809 | return ~Op2;\r | |
2810 | }\r | |
2811 | \r | |
2812 | STATIC\r | |
2813 | UINT64\r | |
2814 | ExecuteNEG (\r | |
2815 | IN VM_CONTEXT *VmPtr,\r | |
2816 | IN UINT64 Op1,\r | |
2817 | IN UINT64 Op2\r | |
2818 | )\r | |
2819 | /*++\r | |
2820 | \r | |
2821 | Routine Description:\r | |
2822 | Execute the EBC NEG instruction\r | |
2823 | \r | |
2824 | Arguments:\r | |
2825 | VmPtr - pointer to a VM context \r | |
2826 | Op1 - Operand 1 from the instruction \r | |
2827 | Op2 - Operand 2 from the instruction\r | |
2828 | \r | |
2829 | Returns:\r | |
2830 | Op2 * -1\r | |
2831 | \r | |
2832 | Instruction syntax:\r | |
2833 | NEG[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2834 | \r | |
2835 | --*/\r | |
2836 | {\r | |
2837 | return ~Op2 + 1;\r | |
2838 | }\r | |
2839 | \r | |
2840 | STATIC\r | |
2841 | UINT64\r | |
2842 | ExecuteADD (\r | |
2843 | IN VM_CONTEXT *VmPtr,\r | |
2844 | IN UINT64 Op1,\r | |
2845 | IN UINT64 Op2\r | |
2846 | )\r | |
2847 | /*++\r | |
2848 | \r | |
2849 | Routine Description:\r | |
2850 | \r | |
2851 | Execute the EBC ADD instruction\r | |
2852 | \r | |
2853 | Arguments:\r | |
2854 | VmPtr - pointer to a VM context \r | |
2855 | Op1 - Operand 1 from the instruction \r | |
2856 | Op2 - Operand 2 from the instruction\r | |
2857 | \r | |
2858 | Returns:\r | |
2859 | Op1 + Op2\r | |
2860 | \r | |
2861 | Instruction syntax:\r | |
2862 | ADD[32|64] {@}R1, {@}R2 {Index16}\r | |
2863 | \r | |
2864 | --*/\r | |
2865 | {\r | |
2866 | return Op1 + Op2;\r | |
2867 | }\r | |
2868 | \r | |
2869 | STATIC\r | |
2870 | UINT64\r | |
2871 | ExecuteSUB (\r | |
2872 | IN VM_CONTEXT *VmPtr,\r | |
2873 | IN UINT64 Op1,\r | |
2874 | IN UINT64 Op2\r | |
2875 | )\r | |
2876 | /*++\r | |
2877 | \r | |
2878 | Routine Description:\r | |
2879 | Execute the EBC SUB instruction\r | |
2880 | \r | |
2881 | Arguments:\r | |
2882 | VmPtr - pointer to a VM context \r | |
2883 | Op1 - Operand 1 from the instruction \r | |
2884 | Op2 - Operand 2 from the instruction\r | |
2885 | \r | |
2886 | Returns:\r | |
2887 | Op1 - Op2\r | |
2888 | Standard EFI_STATUS\r | |
2889 | \r | |
2890 | Instruction syntax:\r | |
2891 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2892 | \r | |
2893 | --*/\r | |
2894 | {\r | |
2895 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
2896 | return (UINT64) ((INT64) ((INT64) Op1 - (INT64) Op2));\r | |
2897 | } else {\r | |
2898 | return (UINT64) ((INT64) ((INT32) Op1 - (INT32) Op2));\r | |
2899 | }\r | |
2900 | }\r | |
2901 | \r | |
2902 | STATIC\r | |
2903 | UINT64\r | |
2904 | ExecuteMUL (\r | |
2905 | IN VM_CONTEXT *VmPtr,\r | |
2906 | IN UINT64 Op1,\r | |
2907 | IN UINT64 Op2\r | |
2908 | )\r | |
2909 | /*++\r | |
2910 | \r | |
2911 | Routine Description:\r | |
2912 | \r | |
2913 | Execute the EBC MUL instruction\r | |
2914 | \r | |
2915 | Arguments:\r | |
2916 | VmPtr - pointer to a VM context \r | |
2917 | Op1 - Operand 1 from the instruction \r | |
2918 | Op2 - Operand 2 from the instruction\r | |
2919 | \r | |
2920 | Returns:\r | |
2921 | Op1 * Op2\r | |
2922 | \r | |
2923 | Instruction syntax:\r | |
2924 | MUL[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2925 | \r | |
2926 | --*/\r | |
2927 | {\r | |
878ddf1f | 2928 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r |
6d7338ae | 2929 | return MultS64x64 ((INT64)Op1, (INT64)Op2);\r |
878ddf1f | 2930 | } else {\r |
2931 | return (UINT64) ((INT64) ((INT32) Op1 * (INT32) Op2));\r | |
2932 | }\r | |
2933 | }\r | |
2934 | \r | |
2935 | STATIC\r | |
2936 | UINT64\r | |
2937 | ExecuteMULU (\r | |
2938 | IN VM_CONTEXT *VmPtr,\r | |
2939 | IN UINT64 Op1,\r | |
2940 | IN UINT64 Op2\r | |
2941 | )\r | |
2942 | /*++\r | |
2943 | \r | |
2944 | Routine Description:\r | |
2945 | Execute the EBC MULU instruction\r | |
2946 | \r | |
2947 | Arguments:\r | |
2948 | VmPtr - pointer to a VM context \r | |
2949 | Op1 - Operand 1 from the instruction \r | |
2950 | Op2 - Operand 2 from the instruction\r | |
2951 | \r | |
2952 | Returns:\r | |
2953 | (unsigned)Op1 * (unsigned)Op2 \r | |
2954 | \r | |
2955 | Instruction syntax:\r | |
2956 | MULU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2957 | \r | |
2958 | --*/\r | |
2959 | {\r | |
878ddf1f | 2960 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r |
6d7338ae | 2961 | return MultU64x64 (Op1, Op2);\r |
878ddf1f | 2962 | } else {\r |
2963 | return (UINT64) ((UINT32) Op1 * (UINT32) Op2);\r | |
2964 | }\r | |
2965 | }\r | |
2966 | \r | |
2967 | STATIC\r | |
2968 | UINT64\r | |
2969 | ExecuteDIV (\r | |
2970 | IN VM_CONTEXT *VmPtr,\r | |
2971 | IN UINT64 Op1,\r | |
2972 | IN UINT64 Op2\r | |
2973 | )\r | |
2974 | /*++\r | |
2975 | \r | |
2976 | Routine Description:\r | |
2977 | \r | |
2978 | Execute the EBC DIV instruction\r | |
2979 | \r | |
2980 | Arguments:\r | |
2981 | VmPtr - pointer to a VM context \r | |
2982 | Op1 - Operand 1 from the instruction \r | |
2983 | Op2 - Operand 2 from the instruction\r | |
2984 | \r | |
2985 | Returns:\r | |
2986 | Op1/Op2\r | |
2987 | \r | |
2988 | Instruction syntax:\r | |
2989 | DIV[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
2990 | \r | |
2991 | --*/\r | |
2992 | {\r | |
2993 | INT64 Remainder;\r | |
878ddf1f | 2994 | \r |
2995 | //\r | |
2996 | // Check for divide-by-0\r | |
2997 | //\r | |
2998 | if (Op2 == 0) {\r | |
2999 | EbcDebugSignalException (\r | |
3000 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3001 | EXCEPTION_FLAG_FATAL,\r | |
3002 | VmPtr\r | |
3003 | );\r | |
3004 | \r | |
3005 | return 0;\r | |
3006 | } else {\r | |
3007 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3008 | return (UINT64) (DivS64x64Remainder (Op1, Op2, &Remainder));\r |
878ddf1f | 3009 | } else {\r |
3010 | return (UINT64) ((INT64) ((INT32) Op1 / (INT32) Op2));\r | |
3011 | }\r | |
3012 | }\r | |
3013 | }\r | |
3014 | \r | |
3015 | STATIC\r | |
3016 | UINT64\r | |
3017 | ExecuteDIVU (\r | |
3018 | IN VM_CONTEXT *VmPtr,\r | |
3019 | IN UINT64 Op1,\r | |
3020 | IN UINT64 Op2\r | |
3021 | )\r | |
3022 | /*++\r | |
3023 | \r | |
3024 | Routine Description:\r | |
3025 | Execute the EBC DIVU instruction\r | |
3026 | \r | |
3027 | Arguments:\r | |
3028 | VmPtr - pointer to a VM context \r | |
3029 | Op1 - Operand 1 from the instruction \r | |
3030 | Op2 - Operand 2 from the instruction\r | |
3031 | \r | |
3032 | Returns:\r | |
3033 | (unsigned)Op1 / (unsigned)Op2\r | |
3034 | \r | |
3035 | Instruction syntax:\r | |
3036 | DIVU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3037 | \r | |
3038 | --*/\r | |
3039 | {\r | |
3040 | UINT64 Remainder;\r | |
878ddf1f | 3041 | \r |
3042 | //\r | |
3043 | // Check for divide-by-0\r | |
3044 | //\r | |
3045 | if (Op2 == 0) {\r | |
3046 | EbcDebugSignalException (\r | |
3047 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3048 | EXCEPTION_FLAG_FATAL,\r | |
3049 | VmPtr\r | |
3050 | );\r | |
3051 | return 0;\r | |
3052 | } else {\r | |
3053 | //\r | |
3054 | // Get the destination register\r | |
3055 | //\r | |
3056 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3057 | return (UINT64) (DivU64x64Remainder ((INT64)Op1, (INT64)Op2, &Remainder));\r |
878ddf1f | 3058 | } else {\r |
3059 | return (UINT64) ((UINT32) Op1 / (UINT32) Op2);\r | |
3060 | }\r | |
3061 | }\r | |
3062 | }\r | |
3063 | \r | |
3064 | STATIC\r | |
3065 | UINT64\r | |
3066 | ExecuteMOD (\r | |
3067 | IN VM_CONTEXT *VmPtr,\r | |
3068 | IN UINT64 Op1,\r | |
3069 | IN UINT64 Op2\r | |
3070 | )\r | |
3071 | /*++\r | |
3072 | \r | |
3073 | Routine Description:\r | |
3074 | Execute the EBC MOD instruction\r | |
3075 | \r | |
3076 | Arguments:\r | |
3077 | VmPtr - pointer to a VM context \r | |
3078 | Op1 - Operand 1 from the instruction \r | |
3079 | Op2 - Operand 2 from the instruction\r | |
3080 | \r | |
3081 | Returns:\r | |
3082 | Op1 MODULUS Op2\r | |
3083 | \r | |
3084 | Instruction syntax:\r | |
3085 | MOD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3086 | \r | |
3087 | --*/\r | |
3088 | {\r | |
3089 | INT64 Remainder;\r | |
878ddf1f | 3090 | \r |
3091 | //\r | |
3092 | // Check for divide-by-0\r | |
3093 | //\r | |
3094 | if (Op2 == 0) {\r | |
3095 | EbcDebugSignalException (\r | |
3096 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3097 | EXCEPTION_FLAG_FATAL,\r | |
3098 | VmPtr\r | |
3099 | );\r | |
3100 | return 0;\r | |
3101 | } else {\r | |
6d7338ae | 3102 | DivS64x64Remainder ((INT64)Op1, (INT64)Op2, &Remainder);\r |
878ddf1f | 3103 | return Remainder;\r |
3104 | }\r | |
3105 | }\r | |
3106 | \r | |
3107 | STATIC\r | |
3108 | UINT64\r | |
3109 | ExecuteMODU (\r | |
3110 | IN VM_CONTEXT *VmPtr,\r | |
3111 | IN UINT64 Op1,\r | |
3112 | IN UINT64 Op2\r | |
3113 | )\r | |
3114 | /*++\r | |
3115 | \r | |
3116 | Routine Description:\r | |
3117 | Execute the EBC MODU instruction\r | |
3118 | \r | |
3119 | Arguments:\r | |
3120 | VmPtr - pointer to a VM context \r | |
3121 | Op1 - Operand 1 from the instruction \r | |
3122 | Op2 - Operand 2 from the instruction\r | |
3123 | \r | |
3124 | Returns:\r | |
3125 | Op1 UNSIGNED_MODULUS Op2\r | |
3126 | \r | |
3127 | Instruction syntax:\r | |
3128 | MODU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3129 | \r | |
3130 | --*/\r | |
3131 | {\r | |
3132 | UINT64 Remainder;\r | |
878ddf1f | 3133 | \r |
3134 | //\r | |
3135 | // Check for divide-by-0\r | |
3136 | //\r | |
3137 | if (Op2 == 0) {\r | |
3138 | EbcDebugSignalException (\r | |
3139 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3140 | EXCEPTION_FLAG_FATAL,\r | |
3141 | VmPtr\r | |
3142 | );\r | |
3143 | return 0;\r | |
3144 | } else {\r | |
6d7338ae | 3145 | DivU64x64Remainder (Op1, Op2, &Remainder);\r |
878ddf1f | 3146 | return Remainder;\r |
3147 | }\r | |
3148 | }\r | |
3149 | \r | |
3150 | STATIC\r | |
3151 | UINT64\r | |
3152 | ExecuteAND (\r | |
3153 | IN VM_CONTEXT *VmPtr,\r | |
3154 | IN UINT64 Op1,\r | |
3155 | IN UINT64 Op2\r | |
3156 | )\r | |
3157 | /*++\r | |
3158 | \r | |
3159 | Routine Description:\r | |
3160 | Execute the EBC AND instruction\r | |
3161 | \r | |
3162 | Arguments:\r | |
3163 | VmPtr - pointer to a VM context \r | |
3164 | Op1 - Operand 1 from the instruction \r | |
3165 | Op2 - Operand 2 from the instruction\r | |
3166 | \r | |
3167 | Returns:\r | |
3168 | Op1 AND Op2\r | |
3169 | \r | |
3170 | Instruction syntax:\r | |
3171 | AND[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3172 | \r | |
3173 | --*/\r | |
3174 | {\r | |
3175 | return Op1 & Op2;\r | |
3176 | }\r | |
3177 | \r | |
3178 | STATIC\r | |
3179 | UINT64\r | |
3180 | ExecuteOR (\r | |
3181 | IN VM_CONTEXT *VmPtr,\r | |
3182 | IN UINT64 Op1,\r | |
3183 | IN UINT64 Op2\r | |
3184 | )\r | |
3185 | /*++\r | |
3186 | \r | |
3187 | Routine Description:\r | |
3188 | Execute the EBC OR instruction\r | |
3189 | \r | |
3190 | Arguments:\r | |
3191 | VmPtr - pointer to a VM context \r | |
3192 | Op1 - Operand 1 from the instruction \r | |
3193 | Op2 - Operand 2 from the instruction\r | |
3194 | \r | |
3195 | Returns:\r | |
3196 | Op1 OR Op2\r | |
3197 | \r | |
3198 | Instruction syntax:\r | |
3199 | OR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3200 | \r | |
3201 | --*/\r | |
3202 | {\r | |
3203 | return Op1 | Op2;\r | |
3204 | }\r | |
3205 | \r | |
3206 | STATIC\r | |
3207 | UINT64\r | |
3208 | ExecuteXOR (\r | |
3209 | IN VM_CONTEXT *VmPtr,\r | |
3210 | IN UINT64 Op1,\r | |
3211 | IN UINT64 Op2\r | |
3212 | )\r | |
3213 | /*++\r | |
3214 | \r | |
3215 | Routine Description:\r | |
3216 | Execute the EBC XOR instruction\r | |
3217 | \r | |
3218 | Arguments:\r | |
3219 | VmPtr - pointer to a VM context \r | |
3220 | Op1 - Operand 1 from the instruction \r | |
3221 | Op2 - Operand 2 from the instruction\r | |
3222 | \r | |
3223 | Returns:\r | |
3224 | Op1 XOR Op2\r | |
3225 | \r | |
3226 | Instruction syntax:\r | |
3227 | XOR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3228 | \r | |
3229 | --*/\r | |
3230 | {\r | |
3231 | return Op1 ^ Op2;\r | |
3232 | }\r | |
3233 | \r | |
3234 | STATIC\r | |
3235 | UINT64\r | |
3236 | ExecuteSHL (\r | |
3237 | IN VM_CONTEXT *VmPtr,\r | |
3238 | IN UINT64 Op1,\r | |
3239 | IN UINT64 Op2\r | |
3240 | )\r | |
3241 | /*++\r | |
3242 | \r | |
3243 | Routine Description:\r | |
3244 | \r | |
3245 | Execute the EBC SHL shift left instruction\r | |
3246 | \r | |
3247 | Arguments:\r | |
3248 | VmPtr - pointer to a VM context \r | |
3249 | Op1 - Operand 1 from the instruction \r | |
3250 | Op2 - Operand 2 from the instruction\r | |
3251 | \r | |
3252 | Returns:\r | |
3253 | Op1 << Op2\r | |
3254 | \r | |
3255 | Instruction syntax:\r | |
3256 | SHL[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3257 | \r | |
3258 | --*/\r | |
3259 | {\r | |
3260 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3261 | return LShiftU64 (Op1, (UINTN)Op2);\r |
878ddf1f | 3262 | } else {\r |
3263 | return (UINT64) ((UINT32) ((UINT32) Op1 << (UINT32) Op2));\r | |
3264 | }\r | |
3265 | }\r | |
3266 | \r | |
3267 | STATIC\r | |
3268 | UINT64\r | |
3269 | ExecuteSHR (\r | |
3270 | IN VM_CONTEXT *VmPtr,\r | |
3271 | IN UINT64 Op1,\r | |
3272 | IN UINT64 Op2\r | |
3273 | )\r | |
3274 | /*++\r | |
3275 | \r | |
3276 | Routine Description:\r | |
3277 | Execute the EBC SHR instruction\r | |
3278 | \r | |
3279 | Arguments:\r | |
3280 | VmPtr - pointer to a VM context \r | |
3281 | Op1 - Operand 1 from the instruction \r | |
3282 | Op2 - Operand 2 from the instruction\r | |
3283 | \r | |
3284 | Returns:\r | |
3285 | Op1 >> Op2 (unsigned operands)\r | |
3286 | \r | |
3287 | Instruction syntax:\r | |
3288 | SHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3289 | \r | |
3290 | --*/\r | |
3291 | {\r | |
3292 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3293 | return RShiftU64 (Op1, (UINTN)Op2);\r |
878ddf1f | 3294 | } else {\r |
3295 | return (UINT64) ((UINT32) Op1 >> (UINT32) Op2);\r | |
3296 | }\r | |
3297 | }\r | |
3298 | \r | |
3299 | STATIC\r | |
3300 | UINT64\r | |
3301 | ExecuteASHR (\r | |
3302 | IN VM_CONTEXT *VmPtr,\r | |
3303 | IN UINT64 Op1,\r | |
3304 | IN UINT64 Op2\r | |
3305 | )\r | |
3306 | /*++\r | |
3307 | \r | |
3308 | Routine Description:\r | |
3309 | Execute the EBC ASHR instruction\r | |
3310 | \r | |
3311 | Arguments:\r | |
3312 | VmPtr - pointer to a VM context \r | |
3313 | Op1 - Operand 1 from the instruction \r | |
3314 | Op2 - Operand 2 from the instruction\r | |
3315 | \r | |
3316 | Returns:\r | |
3317 | Op1 >> Op2 (signed)\r | |
3318 | \r | |
3319 | Instruction syntax:\r | |
3320 | ASHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3321 | \r | |
3322 | --*/\r | |
3323 | {\r | |
3324 | if (*VmPtr->Ip & DATAMANIP_M_64) {\r | |
6d7338ae | 3325 | return ARShiftU64 (Op1, (UINTN)Op2);\r |
878ddf1f | 3326 | } else {\r |
3327 | return (UINT64) ((INT64) ((INT32) Op1 >> (UINT32) Op2));\r | |
3328 | }\r | |
3329 | }\r | |
3330 | \r | |
3331 | STATIC\r | |
3332 | UINT64\r | |
3333 | ExecuteEXTNDB (\r | |
3334 | IN VM_CONTEXT *VmPtr,\r | |
3335 | IN UINT64 Op1,\r | |
3336 | IN UINT64 Op2\r | |
3337 | )\r | |
3338 | /*++\r | |
3339 | \r | |
3340 | Routine Description:\r | |
3341 | Execute the EBC EXTNDB instruction to sign-extend a byte value.\r | |
3342 | \r | |
3343 | Arguments:\r | |
3344 | VmPtr - pointer to a VM context \r | |
3345 | Op1 - Operand 1 from the instruction \r | |
3346 | Op2 - Operand 2 from the instruction\r | |
3347 | \r | |
3348 | Returns:\r | |
3349 | (INT64)(INT8)Op2\r | |
3350 | \r | |
3351 | Instruction syntax:\r | |
3352 | EXTNDB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3353 | \r | |
3354 | \r | |
3355 | --*/\r | |
3356 | {\r | |
3357 | INT8 Data8;\r | |
3358 | INT64 Data64;\r | |
3359 | //\r | |
3360 | // Convert to byte, then return as 64-bit signed value to let compiler\r | |
3361 | // sign-extend the value\r | |
3362 | //\r | |
3363 | Data8 = (INT8) Op2;\r | |
3364 | Data64 = (INT64) Data8;\r | |
3365 | \r | |
3366 | return (UINT64) Data64;\r | |
3367 | }\r | |
3368 | \r | |
3369 | STATIC\r | |
3370 | UINT64\r | |
3371 | ExecuteEXTNDW (\r | |
3372 | IN VM_CONTEXT *VmPtr,\r | |
3373 | IN UINT64 Op1,\r | |
3374 | IN UINT64 Op2\r | |
3375 | )\r | |
3376 | /*++\r | |
3377 | \r | |
3378 | Routine Description:\r | |
3379 | Execute the EBC EXTNDW instruction to sign-extend a 16-bit value.\r | |
3380 | \r | |
3381 | Arguments:\r | |
3382 | VmPtr - pointer to a VM context \r | |
3383 | Op1 - Operand 1 from the instruction \r | |
3384 | Op2 - Operand 2 from the instruction\r | |
3385 | \r | |
3386 | Returns:\r | |
3387 | (INT64)(INT16)Op2\r | |
3388 | \r | |
3389 | Instruction syntax:\r | |
3390 | EXTNDW[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3391 | \r | |
3392 | \r | |
3393 | --*/\r | |
3394 | {\r | |
3395 | INT16 Data16;\r | |
3396 | INT64 Data64;\r | |
3397 | //\r | |
3398 | // Convert to word, then return as 64-bit signed value to let compiler\r | |
3399 | // sign-extend the value\r | |
3400 | //\r | |
3401 | Data16 = (INT16) Op2;\r | |
3402 | Data64 = (INT64) Data16;\r | |
3403 | \r | |
3404 | return (UINT64) Data64;\r | |
3405 | }\r | |
3406 | //\r | |
3407 | // Execute the EBC EXTNDD instruction.\r | |
3408 | //\r | |
3409 | // Format: EXTNDD {@}Rx, {@}Ry [Index16|Immed16]\r | |
3410 | // EXTNDD Dest, Source\r | |
3411 | //\r | |
3412 | // Operation: Dest <- SignExtended((DWORD)Source))\r | |
3413 | //\r | |
3414 | STATIC\r | |
3415 | UINT64\r | |
3416 | ExecuteEXTNDD (\r | |
3417 | IN VM_CONTEXT *VmPtr,\r | |
3418 | IN UINT64 Op1,\r | |
3419 | IN UINT64 Op2\r | |
3420 | )\r | |
3421 | /*++\r | |
3422 | \r | |
3423 | Routine Description:\r | |
3424 | Execute the EBC EXTNDD instruction to sign-extend a 32-bit value.\r | |
3425 | \r | |
3426 | Arguments:\r | |
3427 | VmPtr - pointer to a VM context \r | |
3428 | Op1 - Operand 1 from the instruction \r | |
3429 | Op2 - Operand 2 from the instruction\r | |
3430 | \r | |
3431 | Returns:\r | |
3432 | (INT64)(INT32)Op2\r | |
3433 | \r | |
3434 | Instruction syntax:\r | |
3435 | EXTNDD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3436 | \r | |
3437 | \r | |
3438 | --*/\r | |
3439 | {\r | |
3440 | INT32 Data32;\r | |
3441 | INT64 Data64;\r | |
3442 | //\r | |
3443 | // Convert to 32-bit value, then return as 64-bit signed value to let compiler\r | |
3444 | // sign-extend the value\r | |
3445 | //\r | |
3446 | Data32 = (INT32) Op2;\r | |
3447 | Data64 = (INT64) Data32;\r | |
3448 | \r | |
3449 | return (UINT64) Data64;\r | |
3450 | }\r | |
3451 | \r | |
3452 | STATIC\r | |
3453 | EFI_STATUS\r | |
3454 | ExecuteSignedDataManip (\r | |
3455 | IN VM_CONTEXT *VmPtr\r | |
3456 | )\r | |
3457 | {\r | |
3458 | //\r | |
3459 | // Just call the data manipulation function with a flag indicating this\r | |
3460 | // is a signed operation.\r | |
3461 | //\r | |
3462 | return ExecuteDataManip (VmPtr, TRUE);\r | |
3463 | }\r | |
3464 | \r | |
3465 | STATIC\r | |
3466 | EFI_STATUS\r | |
3467 | ExecuteUnsignedDataManip (\r | |
3468 | IN VM_CONTEXT *VmPtr\r | |
3469 | )\r | |
3470 | {\r | |
3471 | //\r | |
3472 | // Just call the data manipulation function with a flag indicating this\r | |
3473 | // is not a signed operation.\r | |
3474 | //\r | |
3475 | return ExecuteDataManip (VmPtr, FALSE);\r | |
3476 | }\r | |
3477 | \r | |
3478 | STATIC\r | |
3479 | EFI_STATUS\r | |
3480 | ExecuteDataManip (\r | |
3481 | IN VM_CONTEXT *VmPtr,\r | |
3482 | IN BOOLEAN IsSignedOp\r | |
3483 | )\r | |
3484 | /*++\r | |
3485 | \r | |
3486 | Routine Description:\r | |
3487 | Execute all the EBC data manipulation instructions. \r | |
3488 | Since the EBC data manipulation instructions all have the same basic form, \r | |
3489 | they can share the code that does the fetch of operands and the write-back\r | |
3490 | of the result. This function performs the fetch of the operands (even if\r | |
3491 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
3492 | appropriate subfunction, then writes back the returned result.\r | |
3493 | \r | |
3494 | Arguments:\r | |
3495 | VmPtr - pointer to VM context\r | |
3496 | \r | |
3497 | Returns:\r | |
3498 | Standard EBC status\r | |
3499 | \r | |
3500 | Format: \r | |
3501 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
3502 | \r | |
3503 | --*/\r | |
3504 | {\r | |
3505 | UINT8 Opcode;\r | |
3506 | INT16 Index16;\r | |
3507 | UINT8 Operands;\r | |
3508 | UINT8 Size;\r | |
3509 | UINT64 Op1;\r | |
3510 | UINT64 Op2;\r | |
3511 | \r | |
3512 | //\r | |
3513 | // Get opcode and operands\r | |
3514 | //\r | |
3515 | Opcode = GETOPCODE (VmPtr);\r | |
3516 | Operands = GETOPERANDS (VmPtr);\r | |
3517 | \r | |
3518 | //\r | |
3519 | // Determine if we have immediate data by the opcode\r | |
3520 | //\r | |
3521 | if (Opcode & DATAMANIP_M_IMMDATA) {\r | |
3522 | //\r | |
3523 | // Index16 if Ry is indirect, or Immed16 if Ry direct.\r | |
3524 | //\r | |
3525 | if (OPERAND2_INDIRECT (Operands)) {\r | |
3526 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
3527 | } else {\r | |
3528 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
3529 | }\r | |
3530 | \r | |
3531 | Size = 4;\r | |
3532 | } else {\r | |
3533 | Index16 = 0;\r | |
3534 | Size = 2;\r | |
3535 | }\r | |
3536 | //\r | |
3537 | // Now get operand2 (source). It's of format {@}R2 {Index16|Immed16}\r | |
3538 | //\r | |
3539 | Op2 = (UINT64) VmPtr->R[OPERAND2_REGNUM (Operands)] + Index16;\r | |
3540 | if (OPERAND2_INDIRECT (Operands)) {\r | |
3541 | //\r | |
3542 | // Indirect form: @R2 Index16. Fetch as 32- or 64-bit data\r | |
3543 | //\r | |
3544 | if (Opcode & DATAMANIP_M_64) {\r | |
3545 | Op2 = VmReadMem64 (VmPtr, (UINTN) Op2);\r | |
3546 | } else {\r | |
3547 | //\r | |
3548 | // Read as signed value where appropriate.\r | |
3549 | //\r | |
3550 | if (IsSignedOp) {\r | |
3551 | Op2 = (UINT64) (INT64) ((INT32) VmReadMem32 (VmPtr, (UINTN) Op2));\r | |
3552 | } else {\r | |
3553 | Op2 = (UINT64) VmReadMem32 (VmPtr, (UINTN) Op2);\r | |
3554 | }\r | |
3555 | }\r | |
3556 | } else {\r | |
3557 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
3558 | if (IsSignedOp) {\r | |
3559 | Op2 = (UINT64) (INT64) ((INT32) Op2);\r | |
3560 | } else {\r | |
3561 | Op2 = (UINT64) ((UINT32) Op2);\r | |
3562 | }\r | |
3563 | }\r | |
3564 | }\r | |
3565 | //\r | |
3566 | // Get operand1 (destination and sometimes also an actual operand)\r | |
3567 | // of form {@}R1\r | |
3568 | //\r | |
3569 | Op1 = VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
3570 | if (OPERAND1_INDIRECT (Operands)) {\r | |
3571 | if (Opcode & DATAMANIP_M_64) {\r | |
3572 | Op1 = VmReadMem64 (VmPtr, (UINTN) Op1);\r | |
3573 | } else {\r | |
3574 | if (IsSignedOp) {\r | |
3575 | Op1 = (UINT64) (INT64) ((INT32) VmReadMem32 (VmPtr, (UINTN) Op1));\r | |
3576 | } else {\r | |
3577 | Op1 = (UINT64) VmReadMem32 (VmPtr, (UINTN) Op1);\r | |
3578 | }\r | |
3579 | }\r | |
3580 | } else {\r | |
3581 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
3582 | if (IsSignedOp) {\r | |
3583 | Op1 = (UINT64) (INT64) ((INT32) Op1);\r | |
3584 | } else {\r | |
3585 | Op1 = (UINT64) ((UINT32) Op1);\r | |
3586 | }\r | |
3587 | }\r | |
3588 | }\r | |
3589 | //\r | |
3590 | // Dispatch to the computation function\r | |
3591 | //\r | |
3592 | if (((Opcode & OPCODE_M_OPCODE) - OPCODE_NOT) >=\r | |
3593 | (sizeof (mDataManipDispatchTable) / sizeof (mDataManipDispatchTable[0]))\r | |
3594 | ) {\r | |
3595 | EbcDebugSignalException (\r | |
3596 | EXCEPT_EBC_INVALID_OPCODE,\r | |
3597 | EXCEPTION_FLAG_ERROR,\r | |
3598 | VmPtr\r | |
3599 | );\r | |
3600 | //\r | |
3601 | // Advance and return\r | |
3602 | //\r | |
3603 | VmPtr->Ip += Size;\r | |
3604 | return EFI_UNSUPPORTED;\r | |
3605 | } else {\r | |
3606 | Op2 = mDataManipDispatchTable[(Opcode & OPCODE_M_OPCODE) - OPCODE_NOT](VmPtr, Op1, Op2);\r | |
3607 | }\r | |
3608 | //\r | |
3609 | // Write back the result.\r | |
3610 | //\r | |
3611 | if (OPERAND1_INDIRECT (Operands)) {\r | |
3612 | Op1 = VmPtr->R[OPERAND1_REGNUM (Operands)];\r | |
3613 | if (Opcode & DATAMANIP_M_64) {\r | |
3614 | VmWriteMem64 (VmPtr, (UINTN) Op1, Op2);\r | |
3615 | } else {\r | |
3616 | VmWriteMem32 (VmPtr, (UINTN) Op1, (UINT32) Op2);\r | |
3617 | }\r | |
3618 | } else {\r | |
3619 | //\r | |
3620 | // Storage back to a register. Write back, clearing upper bits (as per\r | |
3621 | // the specification) if 32-bit operation.\r | |
3622 | //\r | |
3623 | VmPtr->R[OPERAND1_REGNUM (Operands)] = Op2;\r | |
3624 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
3625 | VmPtr->R[OPERAND1_REGNUM (Operands)] &= 0xFFFFFFFF;\r | |
3626 | }\r | |
3627 | }\r | |
3628 | //\r | |
3629 | // Advance the instruction pointer\r | |
3630 | //\r | |
3631 | VmPtr->Ip += Size;\r | |
3632 | return EFI_SUCCESS;\r | |
3633 | }\r | |
3634 | \r | |
3635 | STATIC\r | |
3636 | EFI_STATUS\r | |
3637 | ExecuteLOADSP (\r | |
3638 | IN VM_CONTEXT *VmPtr\r | |
3639 | )\r | |
3640 | /*++\r | |
3641 | \r | |
3642 | Routine Description:\r | |
3643 | Execute the EBC LOADSP instruction\r | |
3644 | \r | |
3645 | Arguments:\r | |
3646 | VmPtr - pointer to a VM context \r | |
3647 | \r | |
3648 | Returns:\r | |
3649 | Standard EFI_STATUS\r | |
3650 | \r | |
3651 | Instruction syntax:\r | |
3652 | LOADSP SP1, R2\r | |
3653 | \r | |
3654 | --*/\r | |
3655 | {\r | |
3656 | UINT8 Operands;\r | |
3657 | \r | |
3658 | //\r | |
3659 | // Get the operands\r | |
3660 | //\r | |
3661 | Operands = GETOPERANDS (VmPtr);\r | |
3662 | \r | |
3663 | //\r | |
3664 | // Do the operation\r | |
3665 | //\r | |
3666 | switch (OPERAND1_REGNUM (Operands)) {\r | |
3667 | //\r | |
3668 | // Set flags\r | |
3669 | //\r | |
3670 | case 0:\r | |
3671 | //\r | |
3672 | // Spec states that this instruction will not modify reserved bits in\r | |
3673 | // the flags register.\r | |
3674 | //\r | |
3675 | VmPtr->Flags = (VmPtr->Flags &~VMFLAGS_ALL_VALID) | (VmPtr->R[OPERAND2_REGNUM (Operands)] & VMFLAGS_ALL_VALID);\r | |
3676 | break;\r | |
3677 | \r | |
3678 | default:\r | |
3679 | EbcDebugSignalException (\r | |
3680 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
3681 | EXCEPTION_FLAG_WARNING,\r | |
3682 | VmPtr\r | |
3683 | );\r | |
3684 | VmPtr->Ip += 2;\r | |
3685 | return EFI_UNSUPPORTED;\r | |
3686 | }\r | |
3687 | \r | |
3688 | VmPtr->Ip += 2;\r | |
3689 | return EFI_SUCCESS;\r | |
3690 | }\r | |
3691 | \r | |
3692 | STATIC\r | |
3693 | EFI_STATUS\r | |
3694 | ExecuteSTORESP (\r | |
3695 | IN VM_CONTEXT *VmPtr\r | |
3696 | )\r | |
3697 | /*++\r | |
3698 | \r | |
3699 | Routine Description:\r | |
3700 | Execute the EBC STORESP instruction\r | |
3701 | \r | |
3702 | Arguments:\r | |
3703 | VmPtr - pointer to a VM context \r | |
3704 | \r | |
3705 | Returns:\r | |
3706 | Standard EFI_STATUS\r | |
3707 | \r | |
3708 | Instruction syntax:\r | |
3709 | STORESP Rx, FLAGS|IP\r | |
3710 | \r | |
3711 | --*/\r | |
3712 | {\r | |
3713 | UINT8 Operands;\r | |
3714 | \r | |
3715 | //\r | |
3716 | // Get the operands\r | |
3717 | //\r | |
3718 | Operands = GETOPERANDS (VmPtr);\r | |
3719 | \r | |
3720 | //\r | |
3721 | // Do the operation\r | |
3722 | //\r | |
3723 | switch (OPERAND2_REGNUM (Operands)) {\r | |
3724 | //\r | |
3725 | // Get flags\r | |
3726 | //\r | |
3727 | case 0:\r | |
3728 | //\r | |
3729 | // Retrieve the value in the flags register, then clear reserved bits\r | |
3730 | //\r | |
3731 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (UINT64) (VmPtr->Flags & VMFLAGS_ALL_VALID);\r | |
3732 | break;\r | |
3733 | \r | |
3734 | //\r | |
3735 | // Get IP -- address of following instruction\r | |
3736 | //\r | |
3737 | case 1:\r | |
3738 | VmPtr->R[OPERAND1_REGNUM (Operands)] = (UINT64) (UINTN) VmPtr->Ip + 2;\r | |
3739 | break;\r | |
3740 | \r | |
3741 | default:\r | |
3742 | EbcDebugSignalException (\r | |
3743 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
3744 | EXCEPTION_FLAG_WARNING,\r | |
3745 | VmPtr\r | |
3746 | );\r | |
3747 | VmPtr->Ip += 2;\r | |
3748 | return EFI_UNSUPPORTED;\r | |
3749 | break;\r | |
3750 | }\r | |
3751 | \r | |
3752 | VmPtr->Ip += 2;\r | |
3753 | return EFI_SUCCESS;\r | |
3754 | }\r | |
3755 | \r | |
3756 | STATIC\r | |
3757 | INT16\r | |
3758 | VmReadIndex16 (\r | |
3759 | IN VM_CONTEXT *VmPtr,\r | |
3760 | IN UINT32 CodeOffset\r | |
3761 | )\r | |
3762 | /*++\r | |
3763 | \r | |
3764 | Routine Description:\r | |
3765 | Decode a 16-bit index to determine the offset. Given an index value:\r | |
3766 | \r | |
3767 | b15 - sign bit\r | |
3768 | b14:12 - number of bits in this index assigned to natural units (=a)\r | |
3769 | ba:11 - constant units = C\r | |
3770 | b0:a - natural units = N\r | |
3771 | \r | |
3772 | Given this info, the offset can be computed by:\r | |
3773 | offset = sign_bit * (C + N * sizeof(UINTN))\r | |
3774 | \r | |
3775 | Max offset is achieved with index = 0x7FFF giving an offset of\r | |
3776 | 0x27B (32-bit machine) or 0x477 (64-bit machine).\r | |
3777 | Min offset is achieved with index = \r | |
3778 | \r | |
3779 | Arguments:\r | |
3780 | VmPtr - pointer to VM context\r | |
3781 | CodeOffset - offset from IP of the location of the 16-bit index to decode\r | |
3782 | \r | |
3783 | Returns:\r | |
3784 | The decoded offset.\r | |
3785 | \r | |
3786 | --*/\r | |
3787 | {\r | |
3788 | UINT16 Index;\r | |
3789 | INT16 Offset;\r | |
3790 | INT16 C;\r | |
3791 | INT16 N;\r | |
3792 | INT16 NBits;\r | |
3793 | INT16 Mask;\r | |
3794 | \r | |
3795 | //\r | |
3796 | // First read the index from the code stream\r | |
3797 | //\r | |
3798 | Index = VmReadCode16 (VmPtr, CodeOffset);\r | |
3799 | \r | |
3800 | //\r | |
3801 | // Get the mask for N. First get the number of bits from the index.\r | |
3802 | //\r | |
3803 | NBits = (INT16) ((Index & 0x7000) >> 12);\r | |
3804 | \r | |
3805 | //\r | |
3806 | // Scale it for 16-bit indexes\r | |
3807 | //\r | |
3808 | NBits *= 2;\r | |
3809 | \r | |
3810 | //\r | |
3811 | // Now using the number of bits, create a mask.\r | |
3812 | //\r | |
3813 | Mask = (INT16) ((INT16)~0 << NBits);\r | |
3814 | \r | |
3815 | //\r | |
3816 | // Now using the mask, extract N from the lower bits of the index.\r | |
3817 | //\r | |
3818 | N = (INT16) (Index &~Mask);\r | |
3819 | \r | |
3820 | //\r | |
3821 | // Now compute C\r | |
3822 | //\r | |
3823 | C = (INT16) (((Index &~0xF000) & Mask) >> NBits);\r | |
3824 | \r | |
3825 | Offset = (INT16) (N * sizeof (UINTN) + C);\r | |
3826 | \r | |
3827 | //\r | |
3828 | // Now set the sign\r | |
3829 | //\r | |
3830 | if (Index & 0x8000) {\r | |
3831 | //\r | |
3832 | // Do it the hard way to work around a bogus compiler warning\r | |
3833 | //\r | |
3834 | // Offset = -1 * Offset;\r | |
3835 | //\r | |
3836 | Offset = (INT16) ((INT32) Offset * -1);\r | |
3837 | }\r | |
3838 | \r | |
3839 | return Offset;\r | |
3840 | }\r | |
3841 | \r | |
3842 | STATIC\r | |
3843 | INT32\r | |
3844 | VmReadIndex32 (\r | |
3845 | IN VM_CONTEXT *VmPtr,\r | |
3846 | IN UINT32 CodeOffset\r | |
3847 | )\r | |
3848 | /*++\r | |
3849 | \r | |
3850 | Routine Description:\r | |
3851 | Decode a 32-bit index to determine the offset.\r | |
3852 | \r | |
3853 | Arguments:\r | |
3854 | VmPtr - pointer to VM context\r | |
3855 | CodeOffset - offset from IP of the location of the 32-bit index to decode\r | |
3856 | \r | |
3857 | Returns:\r | |
3858 | Converted index per EBC VM specification\r | |
3859 | \r | |
3860 | --*/\r | |
3861 | {\r | |
3862 | UINT32 Index;\r | |
3863 | INT32 Offset;\r | |
3864 | INT32 C;\r | |
3865 | INT32 N;\r | |
3866 | INT32 NBits;\r | |
3867 | INT32 Mask;\r | |
3868 | \r | |
3869 | Index = VmReadImmed32 (VmPtr, CodeOffset);\r | |
3870 | \r | |
3871 | //\r | |
3872 | // Get the mask for N. First get the number of bits from the index.\r | |
3873 | //\r | |
3874 | NBits = (Index & 0x70000000) >> 28;\r | |
3875 | \r | |
3876 | //\r | |
3877 | // Scale it for 32-bit indexes\r | |
3878 | //\r | |
3879 | NBits *= 4;\r | |
3880 | \r | |
3881 | //\r | |
3882 | // Now using the number of bits, create a mask.\r | |
3883 | //\r | |
3884 | Mask = (INT32)~0 << NBits;\r | |
3885 | \r | |
3886 | //\r | |
3887 | // Now using the mask, extract N from the lower bits of the index.\r | |
3888 | //\r | |
3889 | N = Index &~Mask;\r | |
3890 | \r | |
3891 | //\r | |
3892 | // Now compute C\r | |
3893 | //\r | |
3894 | C = ((Index &~0xF0000000) & Mask) >> NBits;\r | |
3895 | \r | |
3896 | Offset = N * sizeof (UINTN) + C;\r | |
3897 | \r | |
3898 | //\r | |
3899 | // Now set the sign\r | |
3900 | //\r | |
3901 | if (Index & 0x80000000) {\r | |
3902 | Offset = Offset * -1;\r | |
3903 | }\r | |
3904 | \r | |
3905 | return Offset;\r | |
3906 | }\r | |
3907 | \r | |
3908 | STATIC\r | |
3909 | INT64\r | |
3910 | VmReadIndex64 (\r | |
3911 | IN VM_CONTEXT *VmPtr,\r | |
3912 | IN UINT32 CodeOffset\r | |
3913 | )\r | |
3914 | /*++\r | |
3915 | \r | |
3916 | Routine Description:\r | |
3917 | Decode a 64-bit index to determine the offset.\r | |
3918 | \r | |
3919 | Arguments:\r | |
3920 | VmPtr - pointer to VM context\r | |
3921 | CodeOffset - offset from IP of the location of the 64-bit index to decode\r | |
3922 | \r | |
3923 | Returns:\r | |
3924 | Converted index per EBC VM specification\r | |
3925 | \r | |
3926 | --*/\r | |
3927 | {\r | |
3928 | UINT64 Index;\r | |
878ddf1f | 3929 | INT64 Offset;\r |
3930 | INT64 C;\r | |
3931 | INT64 N;\r | |
3932 | INT64 NBits;\r | |
3933 | INT64 Mask;\r | |
3934 | \r | |
3935 | Index = VmReadCode64 (VmPtr, CodeOffset);\r | |
3936 | \r | |
3937 | //\r | |
3938 | // Get the mask for N. First get the number of bits from the index.\r | |
3939 | //\r | |
6d7338ae | 3940 | NBits = RShiftU64 ((Index & 0x7000000000000000ULL), 60);\r |
878ddf1f | 3941 | \r |
3942 | //\r | |
3943 | // Scale it for 64-bit indexes (multiply by 8 by shifting left 3)\r | |
3944 | //\r | |
6d7338ae | 3945 | NBits = LShiftU64 ((UINT64)NBits, 3);\r |
878ddf1f | 3946 | \r |
3947 | //\r | |
3948 | // Now using the number of bits, create a mask.\r | |
3949 | //\r | |
6d7338ae | 3950 | Mask = (LShiftU64 ((UINT64)~0, (UINTN)NBits));\r |
878ddf1f | 3951 | \r |
3952 | //\r | |
3953 | // Now using the mask, extract N from the lower bits of the index.\r | |
3954 | //\r | |
3955 | N = Index &~Mask;\r | |
3956 | \r | |
3957 | //\r | |
3958 | // Now compute C\r | |
3959 | //\r | |
6d7338ae | 3960 | C = ARShiftU64 (((Index &~0xF000000000000000ULL) & Mask), (UINTN)NBits);\r |
878ddf1f | 3961 | \r |
6d7338ae | 3962 | Offset = MultU64x64 (N, sizeof (UINTN)) + C;\r |
878ddf1f | 3963 | \r |
3964 | //\r | |
3965 | // Now set the sign\r | |
3966 | //\r | |
3967 | if (Index & 0x8000000000000000ULL) {\r | |
6d7338ae | 3968 | Offset = MultS64x64 (Offset, -1);\r |
878ddf1f | 3969 | }\r |
3970 | \r | |
3971 | return Offset;\r | |
3972 | }\r | |
3973 | \r | |
3974 | STATIC\r | |
3975 | EFI_STATUS\r | |
3976 | VmWriteMem8 (\r | |
3977 | IN VM_CONTEXT *VmPtr,\r | |
3978 | IN UINTN Addr,\r | |
3979 | IN UINT8 Data\r | |
3980 | )\r | |
3981 | /*++\r | |
3982 | \r | |
3983 | Routine Description:\r | |
3984 | The following VmWriteMem? routines are called by the EBC data\r | |
3985 | movement instructions that write to memory. Since these writes\r | |
3986 | may be to the stack, which looks like (high address on top) this,\r | |
3987 | \r | |
3988 | [EBC entry point arguments]\r | |
3989 | [VM stack]\r | |
3990 | [EBC stack]\r | |
3991 | \r | |
3992 | we need to detect all attempts to write to the EBC entry point argument\r | |
3993 | stack area and adjust the address (which will initially point into the \r | |
3994 | VM stack) to point into the EBC entry point arguments.\r | |
3995 | \r | |
3996 | Arguments:\r | |
3997 | VmPtr - pointer to a VM context \r | |
3998 | Addr - adddress to write to\r | |
3999 | Data - value to write to Addr\r | |
4000 | \r | |
4001 | Returns:\r | |
4002 | Standard EFI_STATUS\r | |
4003 | \r | |
4004 | --*/\r | |
4005 | {\r | |
4006 | //\r | |
4007 | // Convert the address if it's in the stack gap\r | |
4008 | //\r | |
4009 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4010 | *(UINT8 *) Addr = Data;\r | |
4011 | return EFI_SUCCESS;\r | |
4012 | }\r | |
4013 | \r | |
4014 | STATIC\r | |
4015 | EFI_STATUS\r | |
4016 | VmWriteMem16 (\r | |
4017 | IN VM_CONTEXT *VmPtr,\r | |
4018 | IN UINTN Addr,\r | |
4019 | IN UINT16 Data\r | |
4020 | )\r | |
4021 | {\r | |
4022 | EFI_STATUS Status;\r | |
4023 | \r | |
4024 | //\r | |
4025 | // Convert the address if it's in the stack gap\r | |
4026 | //\r | |
4027 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4028 | \r | |
4029 | //\r | |
4030 | // Do a simple write if aligned\r | |
4031 | //\r | |
4032 | if (IS_ALIGNED (Addr, sizeof (UINT16))) {\r | |
4033 | *(UINT16 *) Addr = Data;\r | |
4034 | } else {\r | |
4035 | //\r | |
4036 | // Write as two bytes\r | |
4037 | //\r | |
4038 | MemoryFence ();\r | |
4039 | if ((Status = VmWriteMem8 (VmPtr, Addr, (UINT8) Data)) != EFI_SUCCESS) {\r | |
4040 | return Status;\r | |
4041 | }\r | |
4042 | \r | |
4043 | MemoryFence ();\r | |
4044 | if ((Status = VmWriteMem8 (VmPtr, Addr + 1, (UINT8) (Data >> 8))) != EFI_SUCCESS) {\r | |
4045 | return Status;\r | |
4046 | }\r | |
4047 | \r | |
4048 | MemoryFence ();\r | |
4049 | }\r | |
4050 | \r | |
4051 | return EFI_SUCCESS;\r | |
4052 | }\r | |
4053 | \r | |
4054 | STATIC\r | |
4055 | EFI_STATUS\r | |
4056 | VmWriteMem32 (\r | |
4057 | IN VM_CONTEXT *VmPtr,\r | |
4058 | IN UINTN Addr,\r | |
4059 | IN UINT32 Data\r | |
4060 | )\r | |
4061 | {\r | |
4062 | EFI_STATUS Status;\r | |
4063 | \r | |
4064 | //\r | |
4065 | // Convert the address if it's in the stack gap\r | |
4066 | //\r | |
4067 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4068 | \r | |
4069 | //\r | |
4070 | // Do a simple write if aligned\r | |
4071 | //\r | |
4072 | if (IS_ALIGNED (Addr, sizeof (UINT32))) {\r | |
4073 | *(UINT32 *) Addr = Data;\r | |
4074 | } else {\r | |
4075 | //\r | |
4076 | // Write as two words\r | |
4077 | //\r | |
4078 | MemoryFence ();\r | |
4079 | if ((Status = VmWriteMem16 (VmPtr, Addr, (UINT16) Data)) != EFI_SUCCESS) {\r | |
4080 | return Status;\r | |
4081 | }\r | |
4082 | \r | |
4083 | MemoryFence ();\r | |
4084 | if ((Status = VmWriteMem16 (VmPtr, Addr + sizeof (UINT16), (UINT16) (Data >> 16))) != EFI_SUCCESS) {\r | |
4085 | return Status;\r | |
4086 | }\r | |
4087 | \r | |
4088 | MemoryFence ();\r | |
4089 | }\r | |
4090 | \r | |
4091 | return EFI_SUCCESS;\r | |
4092 | }\r | |
4093 | \r | |
4094 | EFI_STATUS\r | |
4095 | VmWriteMem64 (\r | |
4096 | IN VM_CONTEXT *VmPtr,\r | |
4097 | IN UINTN Addr,\r | |
4098 | IN UINT64 Data\r | |
4099 | )\r | |
4100 | {\r | |
4101 | EFI_STATUS Status;\r | |
4102 | UINT32 Data32;\r | |
4103 | \r | |
4104 | //\r | |
4105 | // Convert the address if it's in the stack gap\r | |
4106 | //\r | |
4107 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4108 | \r | |
4109 | //\r | |
4110 | // Do a simple write if aligned\r | |
4111 | //\r | |
4112 | if (IS_ALIGNED (Addr, sizeof (UINT64))) {\r | |
4113 | *(UINT64 *) Addr = Data;\r | |
4114 | } else {\r | |
4115 | //\r | |
4116 | // Write as two 32-bit words\r | |
4117 | //\r | |
4118 | MemoryFence ();\r | |
4119 | if ((Status = VmWriteMem32 (VmPtr, Addr, (UINT32) Data)) != EFI_SUCCESS) {\r | |
4120 | return Status;\r | |
4121 | }\r | |
4122 | \r | |
4123 | MemoryFence ();\r | |
4124 | Data32 = (UINT32) (((UINT32 *) &Data)[1]);\r | |
4125 | if ((Status = VmWriteMem32 (VmPtr, Addr + sizeof (UINT32), Data32)) != EFI_SUCCESS) {\r | |
4126 | return Status;\r | |
4127 | }\r | |
4128 | \r | |
4129 | MemoryFence ();\r | |
4130 | }\r | |
4131 | \r | |
4132 | return EFI_SUCCESS;\r | |
4133 | }\r | |
4134 | \r | |
4135 | EFI_STATUS\r | |
4136 | VmWriteMemN (\r | |
4137 | IN VM_CONTEXT *VmPtr,\r | |
4138 | IN UINTN Addr,\r | |
4139 | IN UINTN Data\r | |
4140 | )\r | |
4141 | {\r | |
4142 | EFI_STATUS Status;\r | |
4143 | UINTN Index;\r | |
4144 | \r | |
4145 | Status = EFI_SUCCESS;\r | |
4146 | \r | |
4147 | //\r | |
4148 | // Convert the address if it's in the stack gap\r | |
4149 | //\r | |
4150 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4151 | \r | |
4152 | //\r | |
4153 | // Do a simple write if aligned\r | |
4154 | //\r | |
4155 | if (IS_ALIGNED (Addr, sizeof (UINTN))) {\r | |
4156 | *(UINTN *) Addr = Data;\r | |
4157 | } else {\r | |
4158 | for (Index = 0; Index < sizeof (UINTN) / sizeof (UINT32); Index++) {\r | |
4159 | MemoryFence ();\r | |
4160 | Status = VmWriteMem32 (VmPtr, Addr + Index * sizeof (UINT32), (UINT32) Data);\r | |
4161 | MemoryFence ();\r | |
4162 | Data = (UINTN)RShiftU64 ((UINT64)Data, 32);\r | |
4163 | }\r | |
4164 | }\r | |
4165 | \r | |
4166 | return Status;\r | |
4167 | }\r | |
4168 | \r | |
4169 | STATIC\r | |
4170 | INT8\r | |
4171 | VmReadImmed8 (\r | |
4172 | IN VM_CONTEXT *VmPtr,\r | |
4173 | IN UINT32 Offset\r | |
4174 | )\r | |
4175 | /*++\r | |
4176 | \r | |
4177 | Routine Description:\r | |
4178 | \r | |
4179 | The following VmReadImmed routines are called by the EBC execute\r | |
4180 | functions to read EBC immediate values from the code stream.\r | |
4181 | Since we can't assume alignment, each tries to read in the biggest \r | |
4182 | chunks size available, but will revert to smaller reads if necessary.\r | |
4183 | \r | |
4184 | Arguments:\r | |
4185 | VmPtr - pointer to a VM context \r | |
4186 | Offset - offset from IP of the code bytes to read.\r | |
4187 | \r | |
4188 | Returns:\r | |
4189 | Signed data of the requested size from the specified address.\r | |
4190 | \r | |
4191 | --*/\r | |
4192 | {\r | |
4193 | //\r | |
4194 | // Simply return the data in flat memory space\r | |
4195 | //\r | |
4196 | return * (INT8 *) (VmPtr->Ip + Offset);\r | |
4197 | }\r | |
4198 | \r | |
4199 | STATIC\r | |
4200 | INT16\r | |
4201 | VmReadImmed16 (\r | |
4202 | IN VM_CONTEXT *VmPtr,\r | |
4203 | IN UINT32 Offset\r | |
4204 | )\r | |
4205 | {\r | |
4206 | //\r | |
4207 | // Read direct if aligned\r | |
4208 | //\r | |
4209 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (INT16))) {\r | |
4210 | return * (INT16 *) (VmPtr->Ip + Offset);\r | |
4211 | } else {\r | |
4212 | //\r | |
4213 | // All code word reads should be aligned\r | |
4214 | //\r | |
4215 | EbcDebugSignalException (\r | |
4216 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
4217 | EXCEPTION_FLAG_WARNING,\r | |
4218 | VmPtr\r | |
4219 | );\r | |
4220 | }\r | |
4221 | //\r | |
4222 | // Return unaligned data\r | |
4223 | //\r | |
4224 | return (INT16) (*(UINT8 *) (VmPtr->Ip + Offset) + (*(UINT8 *) (VmPtr->Ip + Offset + 1) << 8));\r | |
4225 | }\r | |
4226 | \r | |
4227 | STATIC\r | |
4228 | INT32\r | |
4229 | VmReadImmed32 (\r | |
4230 | IN VM_CONTEXT *VmPtr,\r | |
4231 | IN UINT32 Offset\r | |
4232 | )\r | |
4233 | {\r | |
4234 | UINT32 Data;\r | |
4235 | \r | |
4236 | //\r | |
4237 | // Read direct if aligned\r | |
4238 | //\r | |
4239 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT32))) {\r | |
4240 | return * (INT32 *) (VmPtr->Ip + Offset);\r | |
4241 | }\r | |
4242 | //\r | |
4243 | // Return unaligned data\r | |
4244 | //\r | |
4245 | Data = (UINT32) VmReadCode16 (VmPtr, Offset);\r | |
4246 | Data |= (UINT32) (VmReadCode16 (VmPtr, Offset + 2) << 16);\r | |
4247 | return Data;\r | |
4248 | }\r | |
4249 | \r | |
4250 | STATIC\r | |
4251 | INT64\r | |
4252 | VmReadImmed64 (\r | |
4253 | IN VM_CONTEXT *VmPtr,\r | |
4254 | IN UINT32 Offset\r | |
4255 | )\r | |
4256 | {\r | |
4257 | UINT64 Data64;\r | |
4258 | UINT32 Data32;\r | |
4259 | UINT8 *Ptr;\r | |
4260 | \r | |
4261 | //\r | |
4262 | // Read direct if aligned\r | |
4263 | //\r | |
4264 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT64))) {\r | |
4265 | return * (UINT64 *) (VmPtr->Ip + Offset);\r | |
4266 | }\r | |
4267 | //\r | |
4268 | // Return unaligned data.\r | |
4269 | //\r | |
4270 | Ptr = (UINT8 *) &Data64;\r | |
4271 | Data32 = VmReadCode32 (VmPtr, Offset);\r | |
4272 | *(UINT32 *) Ptr = Data32;\r | |
4273 | Ptr += sizeof (Data32);\r | |
4274 | Data32 = VmReadCode32 (VmPtr, Offset + sizeof (UINT32));\r | |
4275 | *(UINT32 *) Ptr = Data32;\r | |
4276 | return Data64;\r | |
4277 | }\r | |
4278 | \r | |
4279 | STATIC\r | |
4280 | UINT16\r | |
4281 | VmReadCode16 (\r | |
4282 | IN VM_CONTEXT *VmPtr,\r | |
4283 | IN UINT32 Offset\r | |
4284 | )\r | |
4285 | /*++\r | |
4286 | \r | |
4287 | Routine Description:\r | |
4288 | The following VmReadCode() routines provide the ability to read raw \r | |
4289 | unsigned data from the code stream. \r | |
4290 | \r | |
4291 | Arguments:\r | |
4292 | VmPtr - pointer to VM context\r | |
4293 | Offset - offset from current IP to the raw data to read.\r | |
4294 | \r | |
4295 | Returns:\r | |
4296 | The raw unsigned 16-bit value from the code stream.\r | |
4297 | \r | |
4298 | --*/\r | |
4299 | {\r | |
4300 | //\r | |
4301 | // Read direct if aligned\r | |
4302 | //\r | |
4303 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT16))) {\r | |
4304 | return * (UINT16 *) (VmPtr->Ip + Offset);\r | |
4305 | } else {\r | |
4306 | //\r | |
4307 | // All code word reads should be aligned\r | |
4308 | //\r | |
4309 | EbcDebugSignalException (\r | |
4310 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
4311 | EXCEPTION_FLAG_WARNING,\r | |
4312 | VmPtr\r | |
4313 | );\r | |
4314 | }\r | |
4315 | //\r | |
4316 | // Return unaligned data\r | |
4317 | //\r | |
4318 | return (UINT16) (*(UINT8 *) (VmPtr->Ip + Offset) + (*(UINT8 *) (VmPtr->Ip + Offset + 1) << 8));\r | |
4319 | }\r | |
4320 | \r | |
4321 | STATIC\r | |
4322 | UINT32\r | |
4323 | VmReadCode32 (\r | |
4324 | IN VM_CONTEXT *VmPtr,\r | |
4325 | IN UINT32 Offset\r | |
4326 | )\r | |
4327 | {\r | |
4328 | UINT32 Data;\r | |
4329 | //\r | |
4330 | // Read direct if aligned\r | |
4331 | //\r | |
4332 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT32))) {\r | |
4333 | return * (UINT32 *) (VmPtr->Ip + Offset);\r | |
4334 | }\r | |
4335 | //\r | |
4336 | // Return unaligned data\r | |
4337 | //\r | |
4338 | Data = (UINT32) VmReadCode16 (VmPtr, Offset);\r | |
4339 | Data |= (VmReadCode16 (VmPtr, Offset + 2) << 16);\r | |
4340 | return Data;\r | |
4341 | }\r | |
4342 | \r | |
4343 | STATIC\r | |
4344 | UINT64\r | |
4345 | VmReadCode64 (\r | |
4346 | IN VM_CONTEXT *VmPtr,\r | |
4347 | IN UINT32 Offset\r | |
4348 | )\r | |
4349 | {\r | |
4350 | UINT64 Data64;\r | |
4351 | UINT32 Data32;\r | |
4352 | UINT8 *Ptr;\r | |
4353 | \r | |
4354 | //\r | |
4355 | // Read direct if aligned\r | |
4356 | //\r | |
4357 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT64))) {\r | |
4358 | return * (UINT64 *) (VmPtr->Ip + Offset);\r | |
4359 | }\r | |
4360 | //\r | |
4361 | // Return unaligned data.\r | |
4362 | //\r | |
4363 | Ptr = (UINT8 *) &Data64;\r | |
4364 | Data32 = VmReadCode32 (VmPtr, Offset);\r | |
4365 | *(UINT32 *) Ptr = Data32;\r | |
4366 | Ptr += sizeof (Data32);\r | |
4367 | Data32 = VmReadCode32 (VmPtr, Offset + sizeof (UINT32));\r | |
4368 | *(UINT32 *) Ptr = Data32;\r | |
4369 | return Data64;\r | |
4370 | }\r | |
4371 | \r | |
4372 | STATIC\r | |
4373 | UINT8\r | |
4374 | VmReadMem8 (\r | |
4375 | IN VM_CONTEXT *VmPtr,\r | |
4376 | IN UINTN Addr\r | |
4377 | )\r | |
4378 | {\r | |
4379 | //\r | |
4380 | // Convert the address if it's in the stack gap\r | |
4381 | //\r | |
4382 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4383 | //\r | |
4384 | // Simply return the data in flat memory space\r | |
4385 | //\r | |
4386 | return * (UINT8 *) Addr;\r | |
4387 | }\r | |
4388 | \r | |
4389 | STATIC\r | |
4390 | UINT16\r | |
4391 | VmReadMem16 (\r | |
4392 | IN VM_CONTEXT *VmPtr,\r | |
4393 | IN UINTN Addr\r | |
4394 | )\r | |
4395 | {\r | |
4396 | //\r | |
4397 | // Convert the address if it's in the stack gap\r | |
4398 | //\r | |
4399 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4400 | //\r | |
4401 | // Read direct if aligned\r | |
4402 | //\r | |
4403 | if (IS_ALIGNED (Addr, sizeof (UINT16))) {\r | |
4404 | return * (UINT16 *) Addr;\r | |
4405 | }\r | |
4406 | //\r | |
4407 | // Return unaligned data\r | |
4408 | //\r | |
4409 | return (UINT16) (*(UINT8 *) Addr + (*(UINT8 *) (Addr + 1) << 8));\r | |
4410 | }\r | |
4411 | \r | |
4412 | STATIC\r | |
4413 | UINT32\r | |
4414 | VmReadMem32 (\r | |
4415 | IN VM_CONTEXT *VmPtr,\r | |
4416 | IN UINTN Addr\r | |
4417 | )\r | |
4418 | {\r | |
4419 | UINT32 Data;\r | |
4420 | \r | |
4421 | //\r | |
4422 | // Convert the address if it's in the stack gap\r | |
4423 | //\r | |
4424 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4425 | //\r | |
4426 | // Read direct if aligned\r | |
4427 | //\r | |
4428 | if (IS_ALIGNED (Addr, sizeof (UINT32))) {\r | |
4429 | return * (UINT32 *) Addr;\r | |
4430 | }\r | |
4431 | //\r | |
4432 | // Return unaligned data\r | |
4433 | //\r | |
4434 | Data = (UINT32) VmReadMem16 (VmPtr, Addr);\r | |
4435 | Data |= (VmReadMem16 (VmPtr, Addr + 2) << 16);\r | |
4436 | return Data;\r | |
4437 | }\r | |
4438 | \r | |
4439 | STATIC\r | |
4440 | UINT64\r | |
4441 | VmReadMem64 (\r | |
4442 | IN VM_CONTEXT *VmPtr,\r | |
4443 | IN UINTN Addr\r | |
4444 | )\r | |
4445 | {\r | |
4446 | UINT64 Data;\r | |
4447 | UINT32 Data32;\r | |
4448 | \r | |
4449 | //\r | |
4450 | // Convert the address if it's in the stack gap\r | |
4451 | //\r | |
4452 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4453 | \r | |
4454 | //\r | |
4455 | // Read direct if aligned\r | |
4456 | //\r | |
4457 | if (IS_ALIGNED (Addr, sizeof (UINT64))) {\r | |
4458 | return * (UINT64 *) Addr;\r | |
4459 | }\r | |
4460 | //\r | |
4461 | // Return unaligned data. Assume little endian.\r | |
4462 | //\r | |
4463 | Data = (UINT64) VmReadMem32 (VmPtr, Addr);\r | |
4464 | Data32 = VmReadMem32 (VmPtr, Addr + sizeof (UINT32));\r | |
4465 | *(UINT32 *) ((UINT32 *) &Data + 1) = Data32;\r | |
4466 | return Data;\r | |
4467 | }\r | |
4468 | \r | |
4469 | STATIC\r | |
4470 | UINTN\r | |
4471 | ConvertStackAddr (\r | |
4472 | IN VM_CONTEXT *VmPtr,\r | |
4473 | IN UINTN Addr\r | |
4474 | )\r | |
4475 | /*++\r | |
4476 | \r | |
4477 | Routine Description:\r | |
4478 | \r | |
4479 | Given an address that EBC is going to read from or write to, return\r | |
4480 | an appropriate address that accounts for a gap in the stack.\r | |
4481 | \r | |
4482 | The stack for this application looks like this (high addr on top)\r | |
4483 | [EBC entry point arguments]\r | |
4484 | [VM stack]\r | |
4485 | [EBC stack]\r | |
4486 | \r | |
4487 | The EBC assumes that its arguments are at the top of its stack, which\r | |
4488 | is where the VM stack is really. Therefore if the EBC does memory\r | |
4489 | accesses into the VM stack area, then we need to convert the address\r | |
4490 | to point to the EBC entry point arguments area. Do this here.\r | |
4491 | \r | |
4492 | Arguments:\r | |
4493 | \r | |
4494 | VmPtr - pointer to VM context\r | |
4495 | Addr - address of interest\r | |
4496 | \r | |
4497 | Returns:\r | |
4498 | \r | |
4499 | The unchanged address if it's not in the VM stack region. Otherwise, \r | |
4500 | adjust for the stack gap and return the modified address.\r | |
4501 | \r | |
4502 | --*/\r | |
73ebf379 | 4503 | { \r |
4504 | ASSERT(((Addr < VmPtr->LowStackTop) || (Addr > VmPtr->HighStackBottom)));\r | |
878ddf1f | 4505 | return Addr;\r |
4506 | }\r | |
4507 | \r | |
4508 | STATIC\r | |
4509 | UINTN\r | |
4510 | VmReadMemN (\r | |
4511 | IN VM_CONTEXT *VmPtr,\r | |
4512 | IN UINTN Addr\r | |
4513 | )\r | |
4514 | /*++\r | |
4515 | \r | |
4516 | Routine Description:\r | |
4517 | Read a natural value from memory. May or may not be aligned.\r | |
4518 | \r | |
4519 | Arguments:\r | |
4520 | VmPtr - current VM context\r | |
4521 | Addr - the address to read from\r | |
4522 | \r | |
4523 | Returns:\r | |
4524 | The natural value at address Addr.\r | |
4525 | \r | |
4526 | --*/\r | |
4527 | {\r | |
4528 | UINTN Data;\r | |
3401c092 | 4529 | volatile UINT32 Size;\r |
878ddf1f | 4530 | UINT8 *FromPtr;\r |
4531 | UINT8 *ToPtr;\r | |
4532 | //\r | |
4533 | // Convert the address if it's in the stack gap\r | |
4534 | //\r | |
4535 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4536 | //\r | |
4537 | // Read direct if aligned\r | |
4538 | //\r | |
4539 | if (IS_ALIGNED (Addr, sizeof (UINTN))) {\r | |
4540 | return * (UINTN *) Addr;\r | |
4541 | }\r | |
4542 | //\r | |
4543 | // Return unaligned data\r | |
4544 | //\r | |
4545 | Data = 0;\r | |
4546 | FromPtr = (UINT8 *) Addr;\r | |
4547 | ToPtr = (UINT8 *) &Data;\r | |
4548 | \r | |
4549 | for (Size = 0; Size < sizeof (Data); Size++) {\r | |
4550 | *ToPtr = *FromPtr;\r | |
4551 | ToPtr++;\r | |
4552 | FromPtr++;\r | |
4553 | }\r | |
4554 | \r | |
4555 | return Data;\r | |
4556 | }\r | |
4557 | \r | |
4558 | UINT64\r | |
4559 | GetVmVersion (\r | |
4560 | VOID\r | |
4561 | )\r | |
4562 | {\r | |
4563 | return (UINT64) (((VM_MAJOR_VERSION & 0xFFFF) << 16) | ((VM_MINOR_VERSION & 0xFFFF)));\r | |
4564 | }\r |